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1 | /* | |
2 | ** Splint - annotation-assisted static program checker | |
3 | ** Copyright (C) 1994-2003 University of Virginia, | |
4 | ** Massachusetts Institute of Technology | |
5 | ** | |
6 | ** This program is free software; you can redistribute it and/or modify it | |
7 | ** under the terms of the GNU General Public License as published by the | |
8 | ** Free Software Foundation; either version 2 of the License, or (at your | |
9 | ** option) any later version. | |
10 | ** | |
11 | ** This program is distributed in the hope that it will be useful, but | |
12 | ** WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | ** General Public License for more details. | |
15 | ** | |
16 | ** The GNU General Public License is available from http://www.gnu.org/ or | |
17 | ** the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, | |
18 | ** MA 02111-1307, USA. | |
19 | ** | |
20 | ** For information on splint: info@splint.org | |
21 | ** To report a bug: splint-bug@splint.org | |
22 | ** For more information: http://www.splint.org | |
23 | */ | |
24 | /* | |
25 | ** exprNode.c | |
26 | */ | |
27 | ||
28 | # include <ctype.h> /* for isdigit */ | |
29 | # include "splintMacros.nf" | |
30 | # include "basic.h" | |
31 | # include "cgrammar.h" | |
32 | # include "cscanner.h" | |
33 | # include "cscannerHelp.h" | |
34 | # include "cgrammar_tokens.h" | |
35 | ||
36 | # include "exprChecks.h" | |
37 | # include "transferChecks.h" | |
38 | # include "exprNodeSList.h" | |
39 | ||
40 | static bool exprNode_sameStorage (exprNode p_e1, exprNode p_e2) /*@*/ ; | |
41 | static bool exprNode_isEmptyStatement (exprNode p_e); | |
42 | static /*@exposed@*/ exprNode exprNode_firstStatement (/*@returned@*/ exprNode p_e); | |
43 | static bool exprNode_isFalseConstant (exprNode p_e) /*@*/ ; | |
44 | static bool exprNode_isStatement (exprNode p_e); | |
45 | static void checkGlobUse (uentry p_glob, bool p_isCall, /*@notnull@*/ exprNode p_e); | |
46 | static void exprNode_addUse (exprNode p_e, /*@exposed@*/ sRef p_s); | |
47 | static bool exprNode_matchArgType (ctype p_ct, exprNode p_e); | |
48 | static exprNode exprNode_fakeCopy (exprNode p_e) /*@*/ ; | |
49 | static exprNode exprNode_statementError (/*@only@*/ exprNode p_e, /*@only@*/ lltok p_t); | |
50 | static bool exprNode_matchTypes (exprNode p_e1, exprNode p_e2); | |
51 | static void checkUniqueParams (exprNode p_fcn, | |
52 | /*@notnull@*/ exprNode p_current, exprNodeList p_args, | |
53 | int p_paramno, uentry p_ucurrent); | |
54 | static void updateAliases (/*@notnull@*/ exprNode p_e1, /*@notnull@*/ exprNode p_e2); | |
55 | static bool abstractOpError (ctype p_tr1, ctype p_tr2, lltok p_op, | |
56 | /*@notnull@*/ exprNode p_e1, /*@notnull@*/ exprNode p_e2, | |
57 | fileloc p_loc1, fileloc p_loc2) | |
58 | /*@modifies g_warningstream@*/ ; | |
59 | static ctype checkNumerics (ctype p_tr1, ctype p_tr2, ctype p_te1, ctype p_te2, | |
60 | /*@notnull@*/ exprNode p_e1, /*@notnull@*/ exprNode p_e2, lltok p_op); | |
61 | static void doAssign (/*@notnull@*/ exprNode p_e1, /*@notnull@*/ exprNode p_e2, bool p_isInit); | |
62 | static void checkSafeUse (exprNode p_e, /*@exposed@*/ sRef p_s); | |
63 | static void reflectNullTest (/*@notnull@*/ exprNode p_e, bool p_isnull); | |
64 | static void checkMacroParen (exprNode p_e); | |
65 | static exprNodeSList exprNode_flatten (/*@dependent@*/ exprNode p_e); | |
66 | static void exprNode_checkSetAny (exprNode p_e, /*@dependent@*/ cstring p_name); | |
67 | static void exprNode_checkUse (exprNode p_e, /*@exposed@*/ sRef p_s, fileloc p_loc); | |
68 | static void exprNode_mergeUSs (exprNode p_res, exprNode p_other); | |
69 | static void exprNode_mergeCondUSs (exprNode p_res, exprNode p_other1, exprNode p_other2); | |
70 | static /*@only@*/ /*@notnull@*/ exprNode exprNode_fromIdentifierAux (/*@observer@*/ uentry p_c); | |
71 | static void checkAnyCall (/*@notnull@*/ /*@dependent@*/ exprNode p_fcn, | |
72 | /*@dependent@*/ cstring p_fname, | |
73 | uentryList p_pn, exprNodeList p_args, | |
74 | bool p_hasMods, sRefSet p_mods, bool p_isSpec, | |
75 | int p_specialArgs); | |
76 | static void checkOneArg (uentry p_ucurrent, /*@notnull@*/ exprNode p_current, | |
77 | /*@dependent@*/ exprNode p_fcn, bool p_isSpec, int p_argno, int p_totargs); | |
78 | static void | |
79 | checkUnspecCall (/*@notnull@*/ /*@dependent@*/ exprNode p_fcn, uentryList p_params, exprNodeList p_args); | |
80 | ||
81 | static /*@only@*/ exprNode exprNode_effect (exprNode p_e) | |
82 | /*@globals internalState@*/ ; | |
83 | static /*@only@*/ cstring exprNode_doUnparse (exprNode p_e); | |
84 | static /*@observer@*/ cstring exprNode_rootVarName (exprNode p_e); | |
85 | static /*@exposed@*/ exprNode | |
86 | exprNode_lastStatement (/*@returned@*/ exprNode p_e); | |
87 | ||
88 | static /*@only@*/ exprNode s_mustExitNode = exprNode_undefined; | |
89 | ||
90 | static int checkArgsReal (uentry p_fcn, /*@dependent@*/ exprNode p_f, | |
91 | uentryList p_cl, | |
92 | exprNodeList p_args, bool p_isIter, exprNode p_ret); | |
93 | ||
94 | static bool inEffect = FALSE; | |
95 | static int nowalloc = 0; | |
96 | static int totalloc = 0; | |
97 | static int maxalloc = 0; | |
98 | ||
99 | static /*@only@*/ uentry regArg; | |
100 | static /*@only@*/ uentry outArg; | |
101 | static /*@only@*/ uentry outStringArg; | |
102 | static /*@exposed@*/ sRef stdinRef; | |
103 | static /*@exposed@*/ sRef stdoutRef; | |
104 | static /*@only@*/ uentry csArg; | |
105 | static /*@only@*/ uentry csOnlyArg; | |
106 | static ctype cstringType; | |
107 | static ctype ctypeType; | |
108 | static ctype filelocType; | |
109 | static bool initMod = FALSE; | |
110 | ||
111 | /*@function void exprNode_swap (sef exprNode, sef exprNode)@*/ | |
112 | /*@-macroassign@*/ | |
113 | # define exprNode_swap(e1,e2) do { exprNode m_tmp = (e1); (e1) = (e2); (e2) = m_tmp; } while (FALSE) | |
114 | /*@=macroassign@*/ | |
115 | ||
116 | static void exprNode_defineConstraints(/*@sef@*/ /*@special@*/ /*@notnull@*/ exprNode e) | |
117 | /*@defines e->requiresConstraints, e->ensuresConstraints, | |
118 | e->trueEnsuresConstraints, e->falseEnsuresConstraints @*/ | |
119 | { | |
120 | e->requiresConstraints = constraintList_makeNew (); | |
121 | e->ensuresConstraints = constraintList_makeNew (); | |
122 | e->trueEnsuresConstraints = constraintList_makeNew (); | |
123 | e->falseEnsuresConstraints = constraintList_makeNew (); | |
124 | } | |
125 | ||
126 | /* | |
127 | ** must occur after library has been read | |
128 | */ | |
129 | ||
130 | void exprNode_initMod (void) | |
131 | /*@globals undef regArg, undef outArg, undef outStringArg, | |
132 | undef csOnlyArg, undef csArg; | |
133 | @*/ | |
134 | { | |
135 | uentry ue; | |
136 | idDecl tmp; | |
137 | ||
138 | initMod = TRUE; | |
139 | cstringType = ctype_unknown; | |
140 | ctypeType = ctype_unknown; | |
141 | filelocType = ctype_unknown; | |
142 | ||
143 | if (usymtab_existsType (cstring_makeLiteralTemp ("cstring"))) | |
144 | { | |
145 | cstringType = usymtab_lookupAbstractType (cstring_makeLiteralTemp ("cstring")); | |
146 | } | |
147 | ||
148 | if (usymtab_existsType (cstring_makeLiteralTemp ("ctype"))) | |
149 | { | |
150 | ctypeType = usymtab_lookupAbstractType (cstring_makeLiteralTemp ("ctype")); | |
151 | } | |
152 | ||
153 | if (usymtab_existsType (cstring_makeLiteralTemp ("fileloc"))) | |
154 | { | |
155 | filelocType = usymtab_lookupAbstractType (cstring_makeLiteralTemp ("fileloc")); | |
156 | } | |
157 | ||
158 | if (usymtab_existsGlob (cstring_makeLiteralTemp ("stdin"))) | |
159 | { | |
160 | ue = usymtab_lookupGlob (cstring_makeLiteralTemp ("stdin")); | |
161 | } | |
162 | else /* define stdin */ | |
163 | { | |
164 | ue = uentry_makeVariable (cstring_makeLiteralTemp ("stdin"), | |
165 | ctype_unknown, | |
166 | fileloc_getBuiltin (), | |
167 | FALSE); | |
168 | uentry_setHasNameError (ue); | |
169 | ue = usymtab_supGlobalEntryReturn (ue); | |
170 | } | |
171 | ||
172 | stdinRef = sRef_makePointer (uentry_getSref (ue)); | |
173 | ||
174 | if (usymtab_existsGlob (cstring_makeLiteralTemp ("stdout"))) | |
175 | { | |
176 | ue = usymtab_lookupGlob (cstring_makeLiteralTemp ("stdout")); | |
177 | } | |
178 | else | |
179 | { | |
180 | ue = uentry_makeVariable (cstring_makeLiteralTemp ("stdout"), | |
181 | ctype_unknown, | |
182 | fileloc_getBuiltin (), | |
183 | FALSE); | |
184 | uentry_setHasNameError (ue); | |
185 | ue = usymtab_supGlobalEntryReturn (ue); | |
186 | } | |
187 | ||
188 | stdoutRef = sRef_makePointer (uentry_getSref (ue)); | |
189 | ||
190 | tmp = idDecl_create (cstring_undefined, qtype_create (ctype_unknown)); | |
191 | ||
192 | regArg = uentry_makeParam (tmp, PARAMUNKNOWN); | |
193 | ||
194 | idDecl_setTyp (tmp, | |
195 | qtype_addQual (qtype_create (ctype_makePointer (ctype_unknown)), | |
196 | qual_createOut ())); | |
197 | ||
198 | outArg = uentry_makeParam (tmp, PARAMUNKNOWN); | |
199 | ||
200 | idDecl_setTyp (tmp, qtype_addQual (qtype_create (ctype_string), | |
201 | qual_createOut ())); | |
202 | ||
203 | outStringArg = uentry_makeParam (tmp, PARAMUNKNOWN); | |
204 | ||
205 | idDecl_setTyp (tmp, qtype_addQual (qtype_addQual (qtype_create (cstringType), | |
206 | qual_createOnly ()), | |
207 | qual_createNull ())); | |
208 | ||
209 | csOnlyArg = uentry_makeParam (tmp, PARAMUNKNOWN); | |
210 | ||
211 | idDecl_setTyp (tmp, qtype_addQual (qtype_create (cstringType), qual_createNull ())); | |
212 | csArg = uentry_makeParam (tmp, PARAMUNKNOWN); | |
213 | ||
214 | idDecl_free (tmp); | |
215 | } | |
216 | ||
217 | void | |
218 | exprNode_destroyMod (void) | |
219 | /*@globals killed regArg, killed outArg, killed outStringArg, | |
220 | killed s_mustExitNode, initMod @*/ | |
221 | { | |
222 | if (initMod) | |
223 | { | |
224 | /* evans 2002-07-12: changed uentry_free to uentry_freeComplete */ | |
225 | uentry_freeComplete (regArg); | |
226 | uentry_freeComplete (outArg); | |
227 | uentry_freeComplete (outStringArg); | |
228 | ||
229 | exprNode_free (s_mustExitNode); | |
230 | initMod = FALSE; | |
231 | /*@-branchstate@*/ | |
232 | } | |
233 | /*@=branchstate@*/ | |
234 | } | |
235 | ||
236 | static void exprNode_resetSref (/*@notnull@*/ exprNode e) | |
237 | { | |
238 | e->sref = sRef_undefined; | |
239 | } | |
240 | ||
241 | exprNode exprNode_fakeCopy (exprNode e) | |
242 | { | |
243 | /*@-temptrans@*/ /*@-retalias@*/ | |
244 | return e; | |
245 | /*@=temptrans@*/ /*@=retalias@*/ | |
246 | } | |
247 | ||
248 | static bool isFlagKey (char key) | |
249 | { | |
250 | return (key == '-' || key == '+' || key == ' ' || key == '#'); | |
251 | } | |
252 | ||
253 | static void exprNode_combineControl (/*@notnull@*/ exprNode ret, | |
254 | /*@notnull@*/ exprNode ifclause, | |
255 | /*@notnull@*/ exprNode elseclause) | |
256 | { | |
257 | ret->canBreak = ifclause->canBreak || elseclause->canBreak; | |
258 | ||
259 | ret->mustBreak = | |
260 | (ifclause->mustBreak || exprNode_mustEscape (ifclause)) | |
261 | && (elseclause->mustBreak || exprNode_mustEscape (elseclause)); | |
262 | ||
263 | ret->exitCode = exitkind_combine (ifclause->exitCode, | |
264 | elseclause->exitCode); | |
265 | ||
266 | } | |
267 | ||
268 | /* | |
269 | ** For exprNode's returned by exprNode_effect. | |
270 | */ | |
271 | ||
272 | static bool shallowKind (exprKind kind) | |
273 | { | |
274 | return (kind == XPR_STRINGLITERAL | |
275 | || kind == XPR_NUMLIT | |
276 | || kind == XPR_EMPTY | |
277 | || kind == XPR_BODY | |
278 | || kind == XPR_NODE); | |
279 | } | |
280 | ||
281 | static void | |
282 | exprNode_freeIniter (/*@only@*/ exprNode e) | |
283 | { | |
284 | if (!exprNode_isError (e)) | |
285 | { | |
286 | switch (e->kind) | |
287 | { | |
288 | case XPR_FACCESS: | |
289 | /* | |
290 | ** Its a fake copy, don't free the field->rec and field->field | |
291 | ** fields. | |
292 | */ | |
293 | ||
294 | /*@-compdestroy@*/ | |
295 | sfree (e->edata->field); | |
296 | /*@=compdestroy@*/ | |
297 | ||
298 | sfree (e->edata); | |
299 | break; | |
300 | case XPR_FETCH: | |
301 | exprNode_free (e->edata->op->b); | |
302 | /*@-compdestroy@*/ sfree (e->edata->op); /*@=compdestroy@*/ | |
303 | sfree (e->edata); | |
304 | break; | |
305 | default: | |
306 | llbug (message ("other: %s", exprNode_unparse (e))); | |
307 | } | |
308 | ||
309 | multiVal_free (e->val); | |
310 | cstring_free (e->etext); | |
311 | fileloc_free (e->loc); | |
312 | sRefSet_free (e->uses); | |
313 | sRefSet_free (e->sets); | |
314 | sRefSet_free (e->msets); | |
315 | guardSet_free (e->guards); | |
316 | ||
317 | constraintList_free(e->requiresConstraints); | |
318 | constraintList_free(e->ensuresConstraints); | |
319 | constraintList_free(e->trueEnsuresConstraints); | |
320 | constraintList_free(e->falseEnsuresConstraints); | |
321 | ||
322 | e->requiresConstraints = NULL; | |
323 | e->ensuresConstraints = NULL; | |
324 | e->trueEnsuresConstraints = NULL; | |
325 | e->falseEnsuresConstraints = NULL; | |
326 | ||
327 | sfree (e); | |
328 | } | |
329 | } | |
330 | ||
331 | void | |
332 | exprNode_freeShallow (/*@only@*/ exprNode e) | |
333 | { | |
334 | if (!exprNode_isError (e)) | |
335 | { | |
336 | if (shallowKind (e->kind)) | |
337 | { | |
338 | } | |
339 | else | |
340 | { | |
341 | if (!inEffect) | |
342 | { | |
343 | if (e->kind == XPR_EMPTY | |
344 | || e->kind == XPR_BODY | |
345 | || e->kind == XPR_STRINGLITERAL | |
346 | || e->kind == XPR_NUMLIT | |
347 | || e->kind == XPR_NODE | |
348 | || e->kind == XPR_OFFSETOF | |
349 | || e->kind == XPR_ALIGNOFT | |
350 | || e->kind == XPR_ALIGNOF | |
351 | || e->kind == XPR_SIZEOFT | |
352 | || e->kind == XPR_SIZEOF) | |
353 | { | |
354 | /* don't free anything */ | |
355 | } | |
356 | else | |
357 | { | |
358 | /* multiVal_free (e->val); */ | |
359 | cstring_free (e->etext); | |
360 | fileloc_free (e->loc); | |
361 | sRefSet_free (e->uses); | |
362 | sRefSet_free (e->sets); | |
363 | sRefSet_free (e->msets); | |
364 | guardSet_free (e->guards); | |
365 | exprData_freeShallow (e->edata, e->kind); | |
366 | nowalloc--; | |
367 | /*@-compdestroy@*/ sfree (e); /*@=compdestroy@*/ | |
368 | /*@-branchstate@*/ | |
369 | } | |
370 | } | |
371 | } /*@=branchstate@*/ | |
372 | } | |
373 | } | |
374 | ||
375 | void | |
376 | exprNode_free (exprNode e) | |
377 | { | |
378 | if (!exprNode_isError (e)) | |
379 | { | |
380 | if (!inEffect) | |
381 | { | |
382 | multiVal_free (e->val); | |
383 | cstring_free (e->etext); | |
384 | fileloc_free (e->loc); | |
385 | sRefSet_free (e->uses); | |
386 | sRefSet_free (e->sets); | |
387 | sRefSet_free (e->msets); | |
388 | guardSet_free (e->guards); | |
389 | exprData_free (e->edata, e->kind); | |
390 | ||
391 | constraintList_free(e->requiresConstraints); | |
392 | constraintList_free(e->ensuresConstraints); | |
393 | constraintList_free(e->trueEnsuresConstraints); | |
394 | constraintList_free(e->falseEnsuresConstraints); | |
395 | ||
396 | e->requiresConstraints = NULL; | |
397 | e->ensuresConstraints = NULL; | |
398 | e->trueEnsuresConstraints = NULL; | |
399 | e->falseEnsuresConstraints = NULL; | |
400 | ||
401 | nowalloc--; | |
402 | sfree (e); | |
403 | /*@-branchstate@*/ | |
404 | } /*@=branchstate@*/ | |
405 | } | |
406 | } | |
407 | ||
408 | exprNode | |
409 | exprNode_makeError () | |
410 | { | |
411 | return exprNode_undefined; | |
412 | } | |
413 | ||
414 | static /*@out@*/ /*@only@*/ /*@notnull@*/ exprNode | |
415 | exprNode_new (void) | |
416 | { | |
417 | exprNode ret = (exprNode) dmalloc (sizeof (*ret)); | |
418 | /* static int lastexpnodes = 0; */ | |
419 | ||
420 | nowalloc++; | |
421 | totalloc++; | |
422 | ||
423 | if (nowalloc > maxalloc) | |
424 | { | |
425 | maxalloc = nowalloc; | |
426 | } | |
427 | ||
428 | return ret; | |
429 | } | |
430 | ||
431 | static /*@notnull@*/ /*@special@*/ exprNode | |
432 | exprNode_createPlain (ctype c) | |
433 | /*@defines result@*/ | |
434 | /*@ensures isnull result->edata, result->loc, result->val, result->guards, | |
435 | result->uses, result->sets, result->msets, result->etext @*/ | |
436 | /*@*/ | |
437 | { | |
438 | exprNode e = exprNode_new (); | |
439 | ||
440 | e->typ = c; | |
441 | e->kind = XPR_EMPTY; | |
442 | e->val = multiVal_undefined; | |
443 | e->sref = sRef_undefined; | |
444 | e->etext = cstring_undefined; | |
445 | e->loc = fileloc_undefined; | |
446 | e->guards = guardSet_undefined; | |
447 | e->uses = sRefSet_undefined; | |
448 | e->sets = sRefSet_undefined; | |
449 | e->msets = sRefSet_undefined; | |
450 | e->edata = exprData_undefined; | |
451 | e->exitCode = XK_NEVERESCAPE; | |
452 | e->canBreak = FALSE; | |
453 | e->mustBreak = FALSE; | |
454 | e->isJumpPoint = FALSE; | |
455 | ||
456 | exprNode_defineConstraints(e); | |
457 | ||
458 | return (e); | |
459 | } | |
460 | ||
461 | /*@observer@*/ exprNode exprNode_makeMustExit (void) | |
462 | { | |
463 | if (exprNode_isUndefined (s_mustExitNode)) | |
464 | { | |
465 | s_mustExitNode = exprNode_createPlain (ctype_unknown); | |
466 | s_mustExitNode->exitCode = XK_MUSTEXIT; | |
467 | } | |
468 | ||
469 | return s_mustExitNode; | |
470 | } | |
471 | ||
472 | ||
473 | static /*@notnull@*/ /*@special@*/ exprNode exprNode_create (ctype c) | |
474 | /*@defines result@*/ | |
475 | /*@post:isnull result->edata, result->guards, result->val, | |
476 | result->uses, result->sets, result->msets@*/ | |
477 | /*@*/ | |
478 | { | |
479 | exprNode e = exprNode_createPlain (c); | |
480 | e->loc = fileloc_copy (g_currentloc); | |
481 | return (e); | |
482 | } | |
483 | ||
484 | static /*@notnull@*/ /*@special@*/ exprNode exprNode_createUnknown (void) | |
485 | /*@defines result@*/ | |
486 | /*@post:isnull result->edata, result->guards, | |
487 | result->uses, result->sets, result->msets@*/ | |
488 | /*@*/ | |
489 | { | |
490 | return (exprNode_create (ctype_unknown)); | |
491 | } | |
492 | ||
493 | static /*@notnull@*/ /*@special@*/ exprNode | |
494 | exprNode_createLoc (ctype c, /*@keep@*/ fileloc loc) | |
495 | /*@defines result@*/ | |
496 | /*@post:isnull result->edata, result->guards, result->val, | |
497 | result->uses, result->sets, result->msets@*/ | |
498 | /*@*/ | |
499 | { | |
500 | exprNode e = exprNode_createPlain (c); | |
501 | e->loc = loc; | |
502 | return (e); | |
503 | } | |
504 | ||
505 | static void | |
506 | exprNode_copySets (/*@special@*/ /*@notnull@*/ exprNode ret, exprNode e) | |
507 | /*@defines ret->guards, ret->uses, ret->sets, ret->msets@*/ | |
508 | { | |
509 | if (exprNode_isDefined (e)) | |
510 | { | |
511 | ret->guards = guardSet_copy (e->guards); | |
512 | ret->uses = sRefSet_newCopy (e->uses); | |
513 | ret->sets = sRefSet_newCopy (e->sets); | |
514 | ret->msets = sRefSet_newCopy (e->msets); | |
515 | } | |
516 | else | |
517 | { | |
518 | ret->guards = guardSet_undefined; | |
519 | ret->uses = sRefSet_undefined; | |
520 | ret->sets = sRefSet_undefined; | |
521 | ret->msets = sRefSet_undefined; | |
522 | } | |
523 | } | |
524 | ||
525 | static /*@notnull@*/ /*@special@*/ exprNode | |
526 | exprNode_createPartialLocCopy (exprNode e, /*@only@*/ fileloc loc) | |
527 | /*@defines result@*/ | |
528 | /*@post:isnull result->edata, result->etext@*/ | |
529 | /*@*/ | |
530 | { | |
531 | exprNode ret = exprNode_new (); | |
532 | ||
533 | if (exprNode_isError (e)) | |
534 | { | |
535 | ret->typ = ctype_unknown; | |
536 | ret->val = multiVal_undefined; | |
537 | ret->loc = loc; | |
538 | ret->guards = guardSet_undefined; | |
539 | ret->uses = sRefSet_undefined; | |
540 | ret->sets = sRefSet_undefined; | |
541 | ret->msets = sRefSet_undefined; | |
542 | } | |
543 | else | |
544 | { | |
545 | ret->typ = e->typ; | |
546 | ret->val = multiVal_copy (e->val); | |
547 | ret->loc = loc; | |
548 | ret->guards = guardSet_copy (e->guards); | |
549 | ret->uses = sRefSet_newCopy (e->uses); | |
550 | ret->sets = sRefSet_newCopy (e->sets); | |
551 | ret->msets = sRefSet_newCopy (e->msets); | |
552 | } | |
553 | ||
554 | ret->kind = XPR_EMPTY; | |
555 | ret->sref = sRef_undefined; | |
556 | ret->etext = cstring_undefined; | |
557 | ret->exitCode = XK_NEVERESCAPE; | |
558 | ret->canBreak = FALSE; | |
559 | ret->mustBreak = FALSE; | |
560 | ret->isJumpPoint = FALSE; | |
561 | ret->edata = exprData_undefined; | |
562 | ||
563 | exprNode_defineConstraints(ret); | |
564 | ||
565 | return (ret); | |
566 | } | |
567 | ||
568 | ||
569 | static /*@notnull@*/ /*@special@*/ exprNode | |
570 | exprNode_createPartialCopy (exprNode e) | |
571 | /*@defines result@*/ | |
572 | /*@post:isnull result->edata, result->etext@*/ | |
573 | /*@*/ | |
574 | { | |
575 | return (exprNode_createPartialLocCopy (e, fileloc_copy (exprNode_loc (e)))); | |
576 | } | |
577 | ||
578 | static /*@notnull@*/ /*@special@*/ exprNode | |
579 | exprNode_createPartialNVCopy (exprNode e) | |
580 | /*@defines result@*/ | |
581 | /*@post:isnull result->edata, result->etext, result->val @*/ | |
582 | /*@*/ | |
583 | { | |
584 | exprNode ret = exprNode_new (); | |
585 | ||
586 | if (exprNode_isError (e)) | |
587 | { | |
588 | ret->typ = ctype_unknown; | |
589 | ret->loc = fileloc_undefined; | |
590 | ret->guards = guardSet_undefined; | |
591 | ret->uses = sRefSet_undefined; | |
592 | ret->sets = sRefSet_undefined; | |
593 | ret->msets = sRefSet_undefined; | |
594 | } | |
595 | else | |
596 | { | |
597 | ret->typ = e->typ; | |
598 | ret->loc = fileloc_copy (e->loc); | |
599 | ret->guards = guardSet_copy (e->guards); | |
600 | ret->uses = sRefSet_newCopy (e->uses); | |
601 | ret->sets = sRefSet_newCopy (e->sets); | |
602 | ret->msets = sRefSet_newCopy (e->msets); | |
603 | } | |
604 | ||
605 | ret->val = multiVal_undefined; | |
606 | ret->kind = XPR_EMPTY; | |
607 | ret->sref = sRef_undefined; | |
608 | ret->etext = cstring_undefined; | |
609 | ret->exitCode = XK_NEVERESCAPE; | |
610 | ret->canBreak = FALSE; | |
611 | ret->mustBreak = FALSE; | |
612 | ret->isJumpPoint = FALSE; | |
613 | ret->edata = exprData_undefined; | |
614 | ||
615 | exprNode_defineConstraints(ret); | |
616 | ||
617 | return (ret); | |
618 | } | |
619 | ||
620 | static /*@notnull@*/ /*@special@*/ exprNode | |
621 | exprNode_createSemiCopy (exprNode e) | |
622 | /*@defines result@*/ | |
623 | /*@post:isnull result->edata, result->etext, result->sets, | |
624 | result->msets, result->uses, result->guards@*/ | |
625 | /*@*/ | |
626 | { | |
627 | if (exprNode_isError (e)) | |
628 | { | |
629 | return exprNode_createPlain (ctype_unknown); | |
630 | } | |
631 | else | |
632 | { | |
633 | exprNode ret = exprNode_new (); | |
634 | ||
635 | ret->typ = e->typ; | |
636 | ret->val = multiVal_copy (e->val); | |
637 | ret->loc = fileloc_copy (e->loc); | |
638 | ret->guards = guardSet_undefined; | |
639 | ret->uses = sRefSet_undefined; | |
640 | ret->sets = sRefSet_undefined; | |
641 | ret->msets = sRefSet_undefined; | |
642 | ||
643 | ret->kind = XPR_EMPTY; | |
644 | ret->sref = sRef_undefined; | |
645 | ret->etext = cstring_undefined; | |
646 | ret->exitCode = XK_NEVERESCAPE; | |
647 | ret->canBreak = FALSE; | |
648 | ret->mustBreak = FALSE; | |
649 | ret->isJumpPoint = FALSE; | |
650 | ret->edata = exprData_undefined; | |
651 | ||
652 | exprNode_defineConstraints(ret); | |
653 | ||
654 | return (ret); | |
655 | } | |
656 | } | |
657 | ||
658 | bool | |
659 | exprNode_isNullValue (exprNode e) | |
660 | { | |
661 | if (exprNode_isDefined (e)) | |
662 | { | |
663 | multiVal m = exprNode_getValue (e); | |
664 | ||
665 | if (multiVal_isInt (m)) | |
666 | { | |
667 | return (multiVal_forceInt (m) == 0); | |
668 | } | |
669 | } | |
670 | ||
671 | return FALSE; | |
672 | } | |
673 | ||
674 | static bool | |
675 | exprNode_isUnknownConstant (/*@notnull@*/ exprNode e) | |
676 | { | |
677 | while (e->kind == XPR_PARENS) | |
678 | { | |
679 | e = exprData_getUopNode (e->edata); | |
680 | ||
681 | if (!exprNode_isDefined (e)) | |
682 | { | |
683 | return FALSE; | |
684 | } | |
685 | ||
686 | /* evans 2002-02-05: was llassert (exprNode_isDefined (e)); but this can fail */ | |
687 | } | |
688 | ||
689 | if (e->kind == XPR_CONST) | |
690 | { | |
691 | multiVal m = exprNode_getValue (e); | |
692 | ||
693 | if (multiVal_isUnknown (m)) | |
694 | { | |
695 | return TRUE; | |
696 | } | |
697 | } | |
698 | ||
699 | return FALSE; | |
700 | } | |
701 | ||
702 | /*@only@*/ exprNode | |
703 | exprNode_numLiteral (ctype c, /*@temp@*/ cstring t, | |
704 | /*@only@*/ fileloc loc, long val) | |
705 | { | |
706 | exprNode e = exprNode_createLoc (c, loc); | |
707 | ||
708 | e->kind = XPR_NUMLIT; | |
709 | ||
710 | llassert (multiVal_isUndefined (e->val)); | |
711 | e->val = multiVal_makeInt (val); | |
712 | e->edata = exprData_makeLiteral (cstring_copy (t)); | |
713 | ||
714 | if (val == 0) | |
715 | { | |
716 | e->sref = sRef_makeUnknown (); | |
717 | sRef_setDefNull (e->sref, e->loc); | |
718 | } | |
719 | ||
720 | DPRINTF (("Num lit: %s / %s", exprNode_unparse (e), ctype_unparse (exprNode_getType (e)))); | |
721 | return (e); | |
722 | } | |
723 | ||
724 | /*@only@*/ exprNode | |
725 | exprNode_charLiteral (char c, cstring text, /*@only@*/ fileloc loc) | |
726 | { | |
727 | exprNode e = exprNode_createLoc (ctype_char, loc); | |
728 | ||
729 | if (context_getFlag (FLG_CHARINTLITERAL)) | |
730 | { | |
731 | e->typ = ctype_makeConj (ctype_char, ctype_int); | |
732 | } | |
733 | ||
734 | e->kind = XPR_NUMLIT; | |
735 | e->val = multiVal_makeChar (c); | |
736 | ||
737 | e->edata = exprData_makeLiteral (cstring_copy (text)); | |
738 | return (e); | |
739 | } | |
740 | ||
741 | /*@only@*/ exprNode | |
742 | exprNode_floatLiteral (double d, ctype ct, cstring text, /*@only@*/ fileloc loc) | |
743 | { | |
744 | exprNode e = exprNode_createLoc (ct, loc); | |
745 | ||
746 | e->kind = XPR_NUMLIT; | |
747 | e->val = multiVal_makeDouble (d); | |
748 | e->edata = exprData_makeLiteral (cstring_copy (text)); | |
749 | return (e); | |
750 | } | |
751 | ||
752 | multiVal exprNode_getValue (exprNode e) | |
753 | { | |
754 | while (exprNode_isInParens (e)) { | |
755 | if (e->edata != NULL) { | |
756 | e = exprData_getUopNode (e->edata); | |
757 | } else { | |
758 | break; | |
759 | } | |
760 | } | |
761 | ||
762 | if (exprNode_isDefined (e)) { | |
763 | return e->val; | |
764 | } else { | |
765 | return multiVal_undefined; | |
766 | } | |
767 | } | |
768 | ||
769 | /*@only@*/ exprNode | |
770 | exprNode_combineLiterals (exprNode e, exprNode rest) | |
771 | { | |
772 | cstring ns; | |
773 | ||
774 | /* Both must be string literals. */ | |
775 | ||
776 | if (exprNode_isUndefined (rest) || exprNode_isUndefined (e)) | |
777 | { | |
778 | exprNode_free (rest); | |
779 | return e; | |
780 | } | |
781 | ||
782 | if (!exprNode_isStringLiteral (e)) | |
783 | { | |
784 | voptgenerror | |
785 | (FLG_SYNTAX, | |
786 | message ("Constant concatentation is ungrammatical: %s %s", exprNode_unparse (e), | |
787 | exprNode_unparse (rest)), | |
788 | e->loc); | |
789 | exprNode_free (rest); | |
790 | return e; | |
791 | } | |
792 | ||
793 | if (!exprNode_isStringLiteral (rest)) | |
794 | { | |
795 | voptgenerror | |
796 | (FLG_SYNTAX, | |
797 | message ("Constant concatentation is ungrammatical: %s %s", exprNode_unparse (e), exprNode_unparse (rest)), | |
798 | rest->loc); | |
799 | ||
800 | exprNode_free (rest); | |
801 | return e; | |
802 | } | |
803 | ||
804 | ns = cstring_concat (multiVal_forceString (exprNode_getValue (e)), | |
805 | multiVal_forceString (exprNode_getValue (rest))); | |
806 | ||
807 | multiVal_free (e->val); | |
808 | exprData_free (e->edata, e->kind); | |
809 | e->edata = exprData_makeLiteral (cstring_copy (ns)); | |
810 | e->val = multiVal_makeString (ns); | |
811 | exprNode_free (rest); | |
812 | return e; | |
813 | } | |
814 | ||
815 | /*@only@*/ exprNode | |
816 | exprNode_rawStringLiteral (/*@only@*/ cstring t, /*@only@*/ fileloc loc) | |
817 | { | |
818 | exprNode e = exprNode_createLoc (ctype_string, loc); | |
819 | size_t len = cstring_length (t); | |
820 | ||
821 | if (context_getFlag (FLG_STRINGLITERALLEN)) | |
822 | { | |
823 | if (len > size_fromInt (context_getValue (FLG_STRINGLITERALLEN))) | |
824 | { | |
825 | voptgenerror (FLG_STRINGLITERALLEN, | |
826 | message | |
827 | ("String literal length (%d) exceeds maximum " | |
828 | "length (%d): \"%s\"", | |
829 | size_toInt (len), | |
830 | context_getValue (FLG_STRINGLITERALLEN), | |
831 | t), | |
832 | e->loc); | |
833 | } | |
834 | } | |
835 | ||
836 | e->kind = XPR_STRINGLITERAL; | |
837 | e->val = multiVal_makeString (cstring_copy (t)); | |
838 | e->edata = exprData_makeLiteral (t); | |
839 | e->sref = sRef_makeConst (ctype_string); | |
840 | ||
841 | if (context_getFlag (FLG_READONLYSTRINGS)) | |
842 | { | |
843 | sRef_setAliasKind (e->sref, AK_STATIC, fileloc_undefined); | |
844 | sRef_setExKind (e->sref, XO_OBSERVER, loc); | |
845 | } | |
846 | else | |
847 | { | |
848 | sRef_setAliasKind (e->sref, AK_ERROR, fileloc_undefined); | |
849 | } | |
850 | ||
851 | return (e); /* s released */ | |
852 | } | |
853 | ||
854 | /*@only@*/ exprNode | |
855 | exprNode_wideStringLiteral (/*@only@*/ cstring t, /*@only@*/ fileloc loc) | |
856 | { | |
857 | exprNode res = exprNode_stringLiteral (t, loc); | |
858 | res->typ = ctype_makeWideString (); | |
859 | return res; | |
860 | } | |
861 | ||
862 | /*@only@*/ exprNode | |
863 | exprNode_stringLiteral (/*@only@*/ cstring t, /*@only@*/ fileloc loc) | |
864 | { | |
865 | size_t len = size_fromInt (size_toInt (cstring_length (t)) - 2); | |
866 | char *ts = cstring_toCharsSafe (t); | |
867 | char *s = cstring_toCharsSafe (cstring_create (len + 1)); | |
868 | ||
869 | llassert (*ts == '\"' && *(ts + len + 1) == '\"'); | |
870 | strncpy (s, ts+1, len); | |
871 | *(s + len) = '\0'; | |
872 | cstring_free (t); | |
873 | return exprNode_rawStringLiteral (cstring_fromCharsO (s), loc); | |
874 | } | |
875 | ||
876 | exprNode exprNode_fromUIO (cstring c) | |
877 | { | |
878 | fileloc loc = context_getSaveLocation (); | |
879 | exprNode e = exprNode_createPlain (ctype_unknown); | |
880 | ||
881 | e->kind = XPR_VAR; | |
882 | ||
883 | if (fileloc_isUndefined (loc)) | |
884 | { | |
885 | loc = fileloc_copy (g_currentloc); | |
886 | } | |
887 | ||
888 | e->loc = loc; /* save loc was mangled */ | |
889 | e->sref = sRef_undefined; | |
890 | ||
891 | if (usymtab_exists (c)) | |
892 | { | |
893 | uentry ue = usymtab_lookupEither (c); | |
894 | ||
895 | if (uentry_isDatatype (ue) | |
896 | && uentry_isSpecified (ue)) | |
897 | { | |
898 | llfatalerror | |
899 | (message ("%q: Specified datatype %s used in code, but not defined. " | |
900 | "(Cannot continue reasonably from this error.)", | |
901 | fileloc_unparse (e->loc), c)); | |
902 | } | |
903 | else | |
904 | { | |
905 | BADBRANCH; | |
906 | } | |
907 | } | |
908 | ||
909 | llassertprint (!usymtab_exists (c), ("Entry exists: %s", c)); | |
910 | ||
911 | /* | |
912 | ** was supercedeGlobalEntry...is this better? | |
913 | */ | |
914 | ||
915 | if (!context_inIterEnd ()) | |
916 | { | |
917 | if (context_inMacro ()) | |
918 | { | |
919 | if (context_getFlag (FLG_UNRECOG)) | |
920 | { | |
921 | voptgenerror | |
922 | (FLG_MACROUNDEF, | |
923 | message ("Unrecognized identifier in macro definition: %s", c), e->loc); | |
924 | } | |
925 | else | |
926 | { | |
927 | flagcode_recordSuppressed (FLG_UNRECOG); | |
928 | } | |
929 | } | |
930 | else | |
931 | { | |
932 | voptgenerror | |
933 | (FLG_UNRECOG, message ("Unrecognized identifier: %s", c), e->loc); | |
934 | } | |
935 | } | |
936 | ||
937 | e->edata = exprData_makeId (uentry_makeUnrecognized (c, fileloc_copy (loc))); | |
938 | ||
939 | /* No alias errors for unrecognized identifiers */ | |
940 | sRef_setAliasKind (e->sref, AK_ERROR, loc); | |
941 | ||
942 | return (e); | |
943 | } | |
944 | ||
945 | exprNode exprNode_makeConstantString (cstring c, /*@only@*/ fileloc loc) | |
946 | { | |
947 | exprNode e = exprNode_createPlain (ctype_unknown); | |
948 | e->kind = XPR_VAR; | |
949 | e->loc = loc; | |
950 | e->sref = sRef_makeConst (ctype_string); | |
951 | e->edata = exprData_makeId (uentry_makeUnrecognized (c, fileloc_copy (loc))); | |
952 | e->typ = ctype_string; | |
953 | ||
954 | /* No alias errors for unrecognized identifiers */ | |
955 | sRef_setAliasKind (e->sref, AK_STATIC, loc); | |
956 | sRef_setExKind (e->sref, XO_OBSERVER, loc); | |
957 | ||
958 | return (e); | |
959 | } | |
960 | ||
961 | exprNode exprNode_createId (/*@observer@*/ uentry c) | |
962 | { | |
963 | if (uentry_isValid (c)) | |
964 | { | |
965 | exprNode e = exprNode_new (); | |
966 | ||
967 | DPRINTF (("create id: %s", uentry_unparse (c))); | |
968 | ||
969 | e->typ = uentry_getType (c); | |
970 | ||
971 | if (uentry_isFunction (c) | |
972 | && !sRef_isLocalVar (uentry_getSref (c))) | |
973 | { | |
974 | e->sref = sRef_undefined; | |
975 | } | |
976 | else | |
977 | { | |
978 | e->sref = uentry_getSref (c); | |
979 | } | |
980 | ||
981 | if (sRef_isStateUnknown (e->sref) && uentry_isNonLocal (c)) | |
982 | { | |
983 | sRef_setDefined (e->sref, fileloc_undefined); | |
984 | } | |
985 | ||
986 | /* | |
987 | ** yoikes! leaving this out was a heinous bug...that would have been | |
988 | ** caught if i had splint working first. gag! | |
989 | */ | |
990 | ||
991 | e->etext = cstring_undefined; | |
992 | ||
993 | if (uentry_isEitherConstant (c)) | |
994 | { | |
995 | e->kind = XPR_CONST; | |
996 | e->val = multiVal_copy (uentry_getConstantValue (c)); | |
997 | } | |
998 | else | |
999 | { | |
1000 | e->kind = XPR_VAR; | |
1001 | e->val = multiVal_unknown (); | |
1002 | } | |
1003 | ||
1004 | e->edata = exprData_makeId (c); | |
1005 | e->loc = context_getSaveLocation (); | |
1006 | ||
1007 | if (fileloc_isUndefined (e->loc)) | |
1008 | { | |
1009 | fileloc_free (e->loc); | |
1010 | e->loc = fileloc_copy (g_currentloc); | |
1011 | } | |
1012 | ||
1013 | e->guards = guardSet_new (); | |
1014 | e->sets = sRefSet_new (); | |
1015 | e->msets = sRefSet_new (); | |
1016 | e->uses = sRefSet_new (); | |
1017 | ||
1018 | /*> missing fields, detected by splint <*/ | |
1019 | e->exitCode = XK_NEVERESCAPE; | |
1020 | e->isJumpPoint = FALSE; | |
1021 | e->canBreak = FALSE; | |
1022 | e->mustBreak = FALSE; | |
1023 | ||
1024 | exprNode_defineConstraints (e); | |
1025 | return e; | |
1026 | } | |
1027 | else | |
1028 | { | |
1029 | return exprNode_createUnknown (); | |
1030 | } | |
1031 | } | |
1032 | ||
1033 | /*@notnull@*/ exprNode | |
1034 | exprNode_fromIdentifier (/*@observer@*/ uentry c) | |
1035 | { | |
1036 | exprNode ret; | |
1037 | ||
1038 | if (context_justPopped ()) /* watch out! c could be dead */ | |
1039 | { | |
1040 | uentry ce = usymtab_lookupSafe (cscannerHelp_observeLastIdentifier ()); | |
1041 | ||
1042 | if (uentry_isValid (ce)) | |
1043 | { | |
1044 | c = ce; | |
1045 | } | |
1046 | else | |
1047 | { | |
1048 | llbuglit ("Looks like Aunt Millie forgot to walk to dog again."); | |
1049 | } | |
1050 | } | |
1051 | ||
1052 | ret = exprNode_fromIdentifierAux (c); | |
1053 | return ret; | |
1054 | } | |
1055 | ||
1056 | static void exprNode_checkStringLiteralLength (ctype t1, exprNode e2) | |
1057 | { | |
1058 | multiVal mval = exprNode_getValue (e2); | |
1059 | cstring slit; | |
1060 | size_t len; | |
1061 | ||
1062 | if (ctype_isFixedArray (t1)) | |
1063 | { | |
1064 | size_t nelements = ctype_getArraySize (t1); | |
1065 | ||
1066 | llassert (multiVal_isString (mval)); | |
1067 | slit = multiVal_forceString (mval); | |
1068 | ||
1069 | len = cstring_lengthExpandEscapes (slit); | |
1070 | ||
1071 | llassert (exprNode_isDefined (e2)); | |
1072 | ||
1073 | if (len == nelements) | |
1074 | { | |
1075 | mstring temp; | |
1076 | ||
1077 | temp = cstring_expandEscapes (slit); | |
1078 | ||
1079 | if (temp[len-1] == '\0') | |
1080 | { | |
1081 | voptgenerror | |
1082 | (FLG_STRINGLITNOROOMFINALNULL, | |
1083 | message ("String literal with %d character%& " | |
1084 | "is assigned to %s (no room for final null terminator): %s", | |
1085 | size_toInt (len + 1), | |
1086 | ctype_unparse (t1), | |
1087 | exprNode_unparse (e2)), | |
1088 | e2->loc); | |
1089 | } | |
1090 | else | |
1091 | { | |
1092 | voptgenerror | |
1093 | (FLG_STRINGLITNOROOM, | |
1094 | message ("String literal with %d character%& " | |
1095 | "is assigned to %s (no room for null terminator): %s", | |
1096 | size_toInt (len + 1), | |
1097 | ctype_unparse (t1), | |
1098 | exprNode_unparse (e2)), | |
1099 | e2->loc); | |
1100 | } | |
1101 | } | |
1102 | else if (len > nelements) | |
1103 | { | |
1104 | voptgenerror | |
1105 | (FLG_STRINGLITTOOLONG, | |
1106 | message ("String literal with %d character%& (counting null terminator) " | |
1107 | "is assigned to %s (insufficient storage available): %s", | |
1108 | size_toInt (len + 1), | |
1109 | ctype_unparse (t1), | |
1110 | exprNode_unparse (e2)), | |
1111 | e2->loc); | |
1112 | } | |
1113 | else if (len < nelements - 1) | |
1114 | { | |
1115 | voptgenerror | |
1116 | (FLG_STRINGLITSMALLER, | |
1117 | message ("String literal with %d character%& is assigned to %s (possible waste of storage): %s", | |
1118 | size_toInt (len + 1), | |
1119 | ctype_unparse (t1), | |
1120 | exprNode_unparse (e2)), | |
1121 | e2->loc); | |
1122 | } | |
1123 | else | |
1124 | { | |
1125 | ; /* okay */ | |
1126 | } | |
1127 | } | |
1128 | } | |
1129 | ||
1130 | static /*@only@*/ /*@notnull@*/ exprNode | |
1131 | exprNode_fromIdentifierAux (/*@observer@*/ uentry c) | |
1132 | { | |
1133 | exprNode e = exprNode_createId (c); | |
1134 | sRef sr = e->sref; | |
1135 | ||
1136 | uentry_setUsed (c, e->loc); | |
1137 | ||
1138 | if (uentry_isVar (c) && sRef_isFileOrGlobalScope (sr)) | |
1139 | { | |
1140 | checkGlobUse (c, FALSE, e); | |
1141 | } | |
1142 | ||
1143 | return (e); | |
1144 | } | |
1145 | ||
1146 | static bool | |
1147 | exprNode_isZero (exprNode e) | |
1148 | { | |
1149 | if (exprNode_isDefined (e)) | |
1150 | { | |
1151 | multiVal m = exprNode_getValue (e); | |
1152 | ||
1153 | if (multiVal_isInt (m)) | |
1154 | { | |
1155 | return (multiVal_forceInt (m) == 0); | |
1156 | } | |
1157 | } | |
1158 | ||
1159 | return FALSE; | |
1160 | } | |
1161 | ||
1162 | static bool | |
1163 | exprNode_isNonNegative (exprNode e) | |
1164 | { | |
1165 | if (exprNode_isDefined (e)) | |
1166 | { | |
1167 | multiVal m = exprNode_getValue (e); | |
1168 | ||
1169 | if (multiVal_isInt (m)) | |
1170 | { | |
1171 | return (multiVal_forceInt (m) >= 0); | |
1172 | } | |
1173 | ||
1174 | /* | |
1175 | ** This is not always true if programmer defines enum | |
1176 | ** values, but then the constant should be known. | |
1177 | */ | |
1178 | ||
1179 | if (ctype_isEnum (ctype_realType (e->typ))) | |
1180 | { | |
1181 | return TRUE; | |
1182 | } | |
1183 | } | |
1184 | ||
1185 | return FALSE; | |
1186 | } | |
1187 | ||
1188 | /* | |
1189 | ** a[x] - uses a but NOT a[] | |
1190 | ** result sref = a[] (set/use in assignment) | |
1191 | ** | |
1192 | ** The syntax x[a] is also legal in C, and has the same | |
1193 | ** semantics. If ind is an array, and arr is an int, flip | |
1194 | ** the arguments. | |
1195 | */ | |
1196 | ||
1197 | /*@only@*/ exprNode | |
1198 | exprNode_arrayFetch (/*@only@*/ exprNode e1, /*@only@*/ exprNode e2) | |
1199 | { | |
1200 | /* | |
1201 | ** error in arr, error propagates (no new messages) | |
1202 | ** error in ind, assume valid and continue | |
1203 | */ | |
1204 | ||
1205 | DPRINTF (("Array fetch: %s / %s", | |
1206 | exprNode_unparse (e1), exprNode_unparse (e2))); | |
1207 | ||
1208 | if (exprNode_isError (e1)) | |
1209 | { | |
1210 | exprNode_free (e2); | |
1211 | return (exprNode_makeError ()); | |
1212 | } | |
1213 | else | |
1214 | { | |
1215 | exprNode arr; | |
1216 | exprNode ind; | |
1217 | ctype carr = exprNode_getType (e1); | |
1218 | ctype crarr = ctype_realType (carr); | |
1219 | ||
1220 | /* | |
1221 | ** this sets up funny aliasing, that leads to spurious | |
1222 | ** splint errors. Hence, the i2 comments. | |
1223 | */ | |
1224 | ||
1225 | /* evans 2001-09-09 added ctype_isKnown so there is no swap when e1 type is unknown */ | |
1226 | if (ctype_isKnown (crarr) | |
1227 | && !ctype_isRealArray (crarr) | |
1228 | && ctype_isRealNumeric (crarr) | |
1229 | && !exprNode_isError (e2) | |
1230 | && ctype_isRealAP (exprNode_getType (e2))) /* fetch like 3[a] */ | |
1231 | { | |
1232 | arr = e2; | |
1233 | ind = e1; | |
1234 | ||
1235 | carr = exprNode_getType (arr); | |
1236 | crarr = ctype_realType (carr); | |
1237 | } | |
1238 | else | |
1239 | { | |
1240 | arr = e1; | |
1241 | ind = e2; | |
1242 | } | |
1243 | ||
1244 | DPRINTF (("arr: %s", exprNode_unparse (arr))); | |
1245 | ||
1246 | if (sRef_possiblyNull (arr->sref)) | |
1247 | { | |
1248 | if (!usymtab_isGuarded (arr->sref)) | |
1249 | { | |
1250 | if (!context_inSizeof() ) | |
1251 | { | |
1252 | if (optgenerror (FLG_NULLDEREF, | |
1253 | message ("Index of %s pointer %q: %s", | |
1254 | sRef_nullMessage (arr->sref), | |
1255 | sRef_unparse (arr->sref), | |
1256 | exprNode_unparse (arr)), | |
1257 | arr->loc)) | |
1258 | { | |
1259 | DPRINTF (("ref: %s", sRef_unparseFull (arr->sref))); | |
1260 | sRef_showNullInfo (arr->sref); | |
1261 | ||
1262 | /* suppress future messages */ | |
1263 | sRef_setNullError (arr->sref); | |
1264 | } | |
1265 | } | |
1266 | } | |
1267 | } | |
1268 | ||
1269 | if (exprNode_isError (ind)) | |
1270 | { | |
1271 | if ((ctype_isArrayPtr (crarr) | |
1272 | && !ctype_isFunction (crarr)) | |
1273 | || ctype_isUnknown (carr)) | |
1274 | { | |
1275 | exprNode ret = exprNode_createPartialCopy (arr); | |
1276 | ||
1277 | if (ctype_isKnown (carr)) | |
1278 | { | |
1279 | ret->typ = ctype_baseArrayPtr (crarr); | |
1280 | } | |
1281 | else | |
1282 | { | |
1283 | ret->typ = ctype_unknown; | |
1284 | } | |
1285 | ||
1286 | ret->sref = sRef_makeArrayFetch (arr->sref); | |
1287 | ||
1288 | ret->kind = XPR_FETCH; | |
1289 | ||
1290 | /* | |
1291 | ** Because of funny aliasing (when arr and ind are | |
1292 | ** flipped) spurious errors would be reported here. | |
1293 | */ | |
1294 | ||
1295 | /*@i2@*/ ret->edata = exprData_makePair (arr, ind); | |
1296 | checkSafeUse (ret, arr->sref); | |
1297 | return (ret); | |
1298 | } | |
1299 | else | |
1300 | { | |
1301 | voptgenerror (FLG_TYPE, | |
1302 | message ("Array fetch from non-array (%t): %s[%s]", carr, | |
1303 | exprNode_unparse (e1), exprNode_unparse (e2)), | |
1304 | arr->loc); | |
1305 | exprNode_free (arr); | |
1306 | return (exprNode_makeError ()); | |
1307 | } | |
1308 | } | |
1309 | else | |
1310 | { | |
1311 | if (!ctype_isForceRealInt (&(ind->typ))) | |
1312 | { | |
1313 | ctype rt = ctype_realType (ind->typ); | |
1314 | ||
1315 | if (ctype_isChar (rt)) | |
1316 | { | |
1317 | vnoptgenerror | |
1318 | (FLG_CHARINDEX, | |
1319 | message ("Array fetch using non-integer, %t: %s[%s]", | |
1320 | ind->typ, | |
1321 | exprNode_unparse (e1), exprNode_unparse (e2)), | |
1322 | arr->loc); | |
1323 | } | |
1324 | else if (ctype_isEnum (rt)) | |
1325 | { | |
1326 | vnoptgenerror | |
1327 | (FLG_ENUMINDEX, | |
1328 | message ("Array fetch using non-integer, %t: %s[%s]", | |
1329 | ind->typ, | |
1330 | exprNode_unparse (e1), exprNode_unparse (e2)), | |
1331 | arr->loc); | |
1332 | } | |
1333 | else if (ctype_isNumAbstract (rt)) | |
1334 | { | |
1335 | vnoptgenerror | |
1336 | (FLG_NUMABSTRACTINDEX, | |
1337 | message ("Array fetch using numabstract type, %t: %s[%s]", | |
1338 | ind->typ, | |
1339 | exprNode_unparse (e1), exprNode_unparse (e2)), | |
1340 | arr->loc); | |
1341 | } | |
1342 | else | |
1343 | { | |
1344 | voptgenerror | |
1345 | (FLG_TYPE, | |
1346 | message ("Array fetch using non-integer, %t: %s[%s]", | |
1347 | ind->typ, | |
1348 | exprNode_unparse (e1), exprNode_unparse (e2)), | |
1349 | arr->loc); | |
1350 | } | |
1351 | ||
1352 | multiVal_free (ind->val); | |
1353 | ind->val = multiVal_unknown (); | |
1354 | } | |
1355 | ||
1356 | if (ctype_isArrayPtr (crarr) && !ctype_isFunction (crarr)) | |
1357 | { | |
1358 | exprNode ret = exprNode_createSemiCopy (arr); | |
1359 | multiVal m = exprNode_getValue (ind); | |
1360 | ||
1361 | ret->typ = ctype_baseArrayPtr (crarr); | |
1362 | ret->kind = XPR_FETCH; | |
1363 | ||
1364 | if (multiVal_isInt (m)) | |
1365 | { | |
1366 | int i = (int) multiVal_forceInt (m); | |
1367 | ||
1368 | if (sRef_isValid (arr->sref)) { | |
1369 | ret->sref = sRef_makeArrayFetchKnown (arr->sref, i); | |
1370 | } else { | |
1371 | ret->sref = sRef_undefined; | |
1372 | } | |
1373 | } | |
1374 | else | |
1375 | { | |
1376 | ret->sref = sRef_makeArrayFetch (arr->sref); | |
1377 | } | |
1378 | ||
1379 | ret->sets = sRefSet_realNewUnion (arr->sets, ind->sets); | |
1380 | ret->msets = sRefSet_realNewUnion (arr->msets, ind->msets); | |
1381 | ret->uses = sRefSet_realNewUnion (arr->uses, ind->uses); | |
1382 | ||
1383 | /* (see comment on spurious errors above) */ | |
1384 | /*@i2@*/ ret->edata = exprData_makePair (arr, ind); | |
1385 | ||
1386 | exprNode_checkUse (ret, ind->sref, ind->loc); | |
1387 | exprNode_checkUse (ret, arr->sref, arr->loc); | |
1388 | ||
1389 | return (ret); | |
1390 | } | |
1391 | else | |
1392 | { | |
1393 | if (ctype_isUnknown (carr)) | |
1394 | { | |
1395 | exprNode ret = exprNode_createPartialCopy (arr); | |
1396 | ||
1397 | ret->kind = XPR_FETCH; | |
1398 | ret->typ = ctype_unknown; | |
1399 | ret->sets = sRefSet_union (ret->sets, ind->sets); | |
1400 | ret->msets = sRefSet_union (ret->msets, ind->msets); | |
1401 | ret->uses = sRefSet_union (ret->uses, ind->uses); | |
1402 | ||
1403 | /* (see comment on spurious errors above) */ | |
1404 | /*@i2@*/ ret->edata = exprData_makePair (arr, ind); | |
1405 | ||
1406 | exprNode_checkUse (ret, ind->sref, ind->loc); | |
1407 | exprNode_checkUse (ret, arr->sref, arr->loc); | |
1408 | return (ret); | |
1409 | } | |
1410 | else | |
1411 | { | |
1412 | voptgenerror | |
1413 | (FLG_TYPE, | |
1414 | message ("Array fetch from non-array (%t): %s[%s]", carr, | |
1415 | exprNode_unparse (e1), exprNode_unparse (e2)), | |
1416 | arr->loc); | |
1417 | ||
1418 | exprNode_free (arr); | |
1419 | exprNode_free (ind); | |
1420 | ||
1421 | return (exprNode_makeError ()); | |
1422 | } | |
1423 | } | |
1424 | } | |
1425 | } | |
1426 | BADEXIT; | |
1427 | } | |
1428 | ||
1429 | ||
1430 | static int | |
1431 | checkArgs (uentry fcn, /*@dependent@*/ exprNode f, ctype t, | |
1432 | exprNodeList args, exprNode ret) | |
1433 | { | |
1434 | return (checkArgsReal (fcn, f, ctype_argsFunction (t), args, FALSE, ret)); | |
1435 | } | |
1436 | ||
1437 | /* | |
1438 | ** checkPrintfArgs --- checks arguments for printf-like functions | |
1439 | ** Arguments before ... have already been checked. | |
1440 | ** The argument before the ... is a char *. | |
1441 | ** argno is the format string argument. | |
1442 | */ | |
1443 | ||
1444 | static void | |
1445 | checkPrintfArgs (/*@notnull@*/ /*@dependent@*/ exprNode f, uentry fcn, | |
1446 | exprNodeList args, exprNode ret, int argno) | |
1447 | { | |
1448 | /* | |
1449 | ** the last argument before the elips is the format string | |
1450 | */ | |
1451 | ||
1452 | int i = argno; | |
1453 | fileloc formatloc; | |
1454 | int nargs = exprNodeList_size (args); | |
1455 | uentryList params = uentry_getParams (fcn); | |
1456 | exprNode a; | |
1457 | ||
1458 | /* | |
1459 | ** These should be ensured by checkSpecialFunction | |
1460 | */ | |
1461 | ||
1462 | llassert (uentryList_size (params) == argno + 1); | |
1463 | llassert (uentry_isElipsisMarker (uentryList_getN (params, argno))); | |
1464 | ||
1465 | a = exprNodeList_getN (args, argno - 1); | |
1466 | formatloc = fileloc_copy (exprNode_loc (a)); | |
1467 | ||
1468 | if (exprNode_isDefined (a) && exprNode_isStringLiteral (a) | |
1469 | && exprNode_knownStringValue (a)) | |
1470 | { | |
1471 | char *format = cstring_toCharsSafe (multiVal_forceString (exprNode_getValue (a))); | |
1472 | char *code = format; | |
1473 | char *ocode = code; | |
1474 | ||
1475 | nargs = exprNodeList_size (args); | |
1476 | ||
1477 | while ((code = strchr (code, '%')) != NULL) | |
1478 | { | |
1479 | char *origcode = code; | |
1480 | cstring codetext = cstring_newEmpty (); | |
1481 | char key = *(++code); | |
1482 | ctype modtype = ctype_int; | |
1483 | bool modified = FALSE; | |
1484 | ||
1485 | fileloc_addColumn (formatloc, code - ocode); | |
1486 | ||
1487 | codetext = cstring_appendChar (codetext, key); | |
1488 | ||
1489 | /* ignore flags */ | |
1490 | while (isFlagKey (key)) | |
1491 | { | |
1492 | key = *(++code); | |
1493 | codetext = cstring_appendChar (codetext, key); | |
1494 | fileloc_incColumn (formatloc); | |
1495 | } | |
1496 | ||
1497 | if (key == 'm') /* skipped in syslog */ | |
1498 | { | |
1499 | continue; | |
1500 | } | |
1501 | ||
1502 | /* ignore field width */ | |
1503 | while (isdigit ((int) key) != 0) | |
1504 | { | |
1505 | key = *(++code); | |
1506 | codetext = cstring_appendChar (codetext, key); | |
1507 | fileloc_incColumn (formatloc); | |
1508 | } | |
1509 | ||
1510 | /* ignore precision */ | |
1511 | if (key == '.') | |
1512 | { | |
1513 | key = *(++code); | |
1514 | codetext = cstring_appendChar (codetext, key); | |
1515 | fileloc_incColumn (formatloc); | |
1516 | ||
1517 | /* | |
1518 | ** In printf, '*' means: read the next arg as an int for the | |
1519 | ** field width. This seems to be missing from my copy of the | |
1520 | ** standard x3.159-1989. Setion 4.9.6.1 refers to * (described | |
1521 | ** later) but never does. | |
1522 | */ | |
1523 | ||
1524 | if (key == '*') | |
1525 | { | |
1526 | ; /* don't do anything --- handle later */ | |
1527 | } | |
1528 | else | |
1529 | { | |
1530 | while (isdigit ((int) key) != 0) | |
1531 | { | |
1532 | key = *(++code); | |
1533 | codetext = cstring_appendChar (codetext, key); | |
1534 | fileloc_incColumn (formatloc); | |
1535 | } | |
1536 | } | |
1537 | } | |
1538 | ||
1539 | if (key == 'h') | |
1540 | { | |
1541 | modtype = ctype_sint; /* short */ | |
1542 | key = *(++code); | |
1543 | codetext = cstring_appendChar (codetext, key); | |
1544 | fileloc_incColumn (formatloc); | |
1545 | } | |
1546 | else if (key == 'l' || key == 'L') | |
1547 | { | |
1548 | modtype = ctype_lint; /* long */ | |
1549 | key = *(++code); | |
1550 | codetext = cstring_appendChar (codetext, key); | |
1551 | fileloc_incColumn (formatloc); | |
1552 | ||
1553 | if (key == 'l' || key == 'L') { | |
1554 | modtype = ctype_llint; /* long long */ | |
1555 | key = *(++code); | |
1556 | codetext = cstring_appendChar (codetext, key); | |
1557 | fileloc_incColumn (formatloc); | |
1558 | } | |
1559 | } | |
1560 | else | |
1561 | { | |
1562 | ; /* no modifier */ | |
1563 | } | |
1564 | ||
1565 | /* now, key = type of conversion to apply */ | |
1566 | ++code; | |
1567 | fileloc_incColumn (formatloc); | |
1568 | ||
1569 | if (key != '%') | |
1570 | { | |
1571 | if (i >= nargs) | |
1572 | { | |
1573 | if (optgenerror | |
1574 | (FLG_TYPE, | |
1575 | message ("No argument corresponding to %q format " | |
1576 | "code %d (%%%s): \"%s\"", | |
1577 | uentry_getName (fcn), | |
1578 | i, codetext, | |
1579 | cstring_fromChars (format)), | |
1580 | f->loc)) | |
1581 | { | |
1582 | if (fileloc_isDefined (formatloc) | |
1583 | && context_getFlag (FLG_SHOWCOL)) | |
1584 | { | |
1585 | llgenindentmsg (cstring_makeLiteral ("Corresponding format code"), | |
1586 | formatloc); | |
1587 | } | |
1588 | } | |
1589 | i++; | |
1590 | } | |
1591 | else | |
1592 | { | |
1593 | a = exprNodeList_getN (args, i); | |
1594 | i++; | |
1595 | ||
1596 | if (!exprNode_isError (a)) | |
1597 | { | |
1598 | ctype expecttype; | |
1599 | ||
1600 | switch (key) | |
1601 | { | |
1602 | case '*': /* int argument for fieldwidth */ | |
1603 | expecttype = ctype_int; | |
1604 | *(--code) = '%'; /* convert it for next code */ | |
1605 | fileloc_subColumn (formatloc, 1); | |
1606 | /*@switchbreak@*/ break; | |
1607 | case 'u': | |
1608 | case 'o': | |
1609 | expecttype = ctype_combine (ctype_uint, modtype); | |
1610 | /*@switchbreak@*/ break; | |
1611 | ||
1612 | case 'i': /* int argument */ | |
1613 | case 'd': | |
1614 | expecttype = ctype_combine (ctype_int, modtype); | |
1615 | /*@switchbreak@*/ break; | |
1616 | ||
1617 | case 'x': /* unsigned int */ | |
1618 | case 'X': | |
1619 | expecttype = ctype_combine (ctype_uint, modtype); | |
1620 | ||
1621 | /*@switchbreak@*/ break; | |
1622 | ||
1623 | case 'e': | |
1624 | case 'E': | |
1625 | case 'g': | |
1626 | case 'G': | |
1627 | case 'f': /* double */ | |
1628 | expecttype = ctype_combine (ctype_double, modtype); | |
1629 | /*@switchbreak@*/ break; | |
1630 | ||
1631 | case 'c': /* int converted to char (check its a char?) */ | |
1632 | expecttype = ctype_makeConj (ctype_int, | |
1633 | ctype_makeConj (ctype_char, | |
1634 | ctype_uchar)); | |
1635 | /* evans 2001-10-05 - changed to reflect correct ISO spec: | |
1636 | int converted to char */ | |
1637 | ||
1638 | /*@switchbreak@*/ break; | |
1639 | ||
1640 | case 's': /* string */ | |
1641 | expecttype = ctype_string; | |
1642 | /*@switchbreak@*/ break; | |
1643 | case '[': | |
1644 | /* skip to ']' */ | |
1645 | while (((key = *(++code)) != ']') | |
1646 | && (key != '\0')) | |
1647 | { | |
1648 | codetext = cstring_appendChar (codetext, key); | |
1649 | fileloc_incColumn (formatloc); | |
1650 | } | |
1651 | ||
1652 | if (key == '\0') | |
1653 | { | |
1654 | llfatalerrorLoc | |
1655 | (message ("Bad character set format: %s", | |
1656 | cstring_fromChars (origcode))); | |
1657 | } | |
1658 | ||
1659 | expecttype = ctype_string; | |
1660 | /*@switchbreak@*/ break; | |
1661 | ||
1662 | case 'p': /* pointer */ | |
1663 | expecttype = ctype_makePointer (ctype_void); | |
1664 | /* need not be defined */ | |
1665 | uentry_setDefState (regArg, SS_RELDEF); | |
1666 | sRef_setPosNull (uentry_getSref (regArg), | |
1667 | fileloc_undefined); | |
1668 | /* could be null */ | |
1669 | /*@switchbreak@*/ break; | |
1670 | ||
1671 | case 'n': /* pointer to int, modified by call! */ | |
1672 | expecttype = ctype_combine (ctype_makePointer (ctype_int), modtype); | |
1673 | modified = TRUE; | |
1674 | uentry_setDefState (regArg, SS_ALLOCATED); /* corresponds to out */ | |
1675 | /*@switchbreak@*/ break; | |
1676 | ||
1677 | case 'm': /* in a syslog, it doesn't consume an argument */ | |
1678 | /* should check we're really doing syslog */ | |
1679 | ||
1680 | /*@switchbreak@*/ break; | |
1681 | ||
1682 | ||
1683 | default: | |
1684 | expecttype = ctype_unknown; | |
1685 | ||
1686 | voptgenerror | |
1687 | (FLG_FORMATCODE, | |
1688 | message ("Unrecognized format code: %s", | |
1689 | cstring_fromChars (origcode)), | |
1690 | fileloc_isDefined (formatloc) | |
1691 | ? formatloc : g_currentloc); | |
1692 | ||
1693 | /*@switchbreak@*/ break; | |
1694 | } | |
1695 | ||
1696 | if (!(exprNode_matchArgType (expecttype, a))) | |
1697 | { | |
1698 | if (ctype_isVoidPointer (expecttype) | |
1699 | && ctype_isRealAbstract (a->typ) | |
1700 | && (context_getFlag (FLG_ABSTVOIDP))) | |
1701 | { | |
1702 | ; | |
1703 | } | |
1704 | else | |
1705 | { | |
1706 | if (llgenformattypeerror | |
1707 | (expecttype, exprNode_undefined, | |
1708 | a->typ, a, | |
1709 | message ("Format argument %d to %q (%%%s) expects " | |
1710 | "%t gets %t: %s", | |
1711 | i - argno, | |
1712 | uentry_getName (fcn), | |
1713 | codetext, | |
1714 | expecttype, | |
1715 | a->typ, exprNode_unparse (a)), | |
1716 | a->loc)) | |
1717 | { | |
1718 | if (fileloc_isDefined (formatloc) | |
1719 | && context_getFlag (FLG_SHOWCOL)) | |
1720 | { | |
1721 | llgenindentmsg | |
1722 | (cstring_makeLiteral | |
1723 | ("Corresponding format code"), | |
1724 | formatloc); | |
1725 | } | |
1726 | } | |
1727 | } | |
1728 | } | |
1729 | ||
1730 | uentry_setType (regArg, expecttype); | |
1731 | checkOneArg (regArg, a, f, FALSE, i+1, nargs); | |
1732 | ||
1733 | if (ctype_equal (expecttype, ctype_string)) | |
1734 | { | |
1735 | exprNode_checkUse (a, sRef_makePointer (a->sref), a->loc); | |
1736 | } | |
1737 | ||
1738 | uentry_setType (regArg, ctype_unknown); | |
1739 | uentry_fixupSref (regArg); | |
1740 | ||
1741 | if (modified) | |
1742 | { | |
1743 | exprNode_checkCallModifyVal (a->sref, args, f, ret); | |
1744 | } | |
1745 | } | |
1746 | else | |
1747 | { | |
1748 | ; | |
1749 | } | |
1750 | } | |
1751 | } | |
1752 | ||
1753 | ocode = code; | |
1754 | cstring_free (codetext); | |
1755 | } | |
1756 | ||
1757 | if (i < nargs) | |
1758 | { | |
1759 | voptgenerror (FLG_TYPE, | |
1760 | message ("Format string for %q has %d arg%&, given %d", | |
1761 | uentry_getName (fcn), i - argno, nargs - argno), | |
1762 | f->loc); | |
1763 | } | |
1764 | } | |
1765 | else | |
1766 | { | |
1767 | /* no checking possible for compile-time unknown format strings */ | |
1768 | if (exprNode_isDefined (a)) | |
1769 | { | |
1770 | voptgenerror | |
1771 | (FLG_FORMATCONST, | |
1772 | message ("Format string parameter to %s is not a compile-time constant: %s", | |
1773 | exprNode_unparse (f), | |
1774 | exprNode_unparse (a)), | |
1775 | f->loc); | |
1776 | } | |
1777 | } | |
1778 | ||
1779 | fileloc_free (formatloc); | |
1780 | } | |
1781 | ||
1782 | static void | |
1783 | checkScanfArgs (/*@notnull@*/ /*@dependent@*/ exprNode f, uentry fcn, | |
1784 | exprNodeList args, exprNode ret, int argno) | |
1785 | { | |
1786 | int i = argno; | |
1787 | fileloc formatloc; | |
1788 | int nargs = exprNodeList_size (args); | |
1789 | uentryList params = uentry_getParams (fcn); | |
1790 | exprNode a; | |
1791 | ||
1792 | /* | |
1793 | ** These should be ensured by checkSpecialFunction | |
1794 | */ | |
1795 | ||
1796 | llassert (uentryList_size (params) == argno + 1); | |
1797 | llassert (uentry_isElipsisMarker (uentryList_getN (params, argno))); | |
1798 | ||
1799 | a = exprNodeList_getN (args, argno - 1); | |
1800 | formatloc = fileloc_copy (exprNode_loc (a)); | |
1801 | ||
1802 | if (exprNode_isDefined (a) && exprNode_isStringLiteral (a) | |
1803 | && exprNode_knownStringValue (a)) | |
1804 | { | |
1805 | char *format = cstring_toCharsSafe (multiVal_forceString (exprNode_getValue (a))); | |
1806 | char *code = format; | |
1807 | char *ocode = code; | |
1808 | ||
1809 | nargs = exprNodeList_size (args); | |
1810 | ||
1811 | while ((code = strchr (code, '%')) != NULL) | |
1812 | { | |
1813 | char *origcode = code; | |
1814 | char key = *(++code); | |
1815 | cstring codetext = cstring_newEmpty (); | |
1816 | ctype modtype = ctype_int; | |
1817 | char modifier = '\0'; | |
1818 | bool modified = TRUE; | |
1819 | bool ignore = FALSE; | |
1820 | ||
1821 | codetext = cstring_appendChar (codetext, key); | |
1822 | fileloc_addColumn (formatloc, code - ocode); | |
1823 | ||
1824 | /* | |
1825 | ** this is based on ANSI standard library description of fscanf | |
1826 | ** (from ANSI standard X3.159-1989, 4.9.6.1) | |
1827 | */ | |
1828 | ||
1829 | /* '*' suppresses assignment (does not need match argument) */ | |
1830 | ||
1831 | if (key == '*') | |
1832 | { | |
1833 | key = *(++code); | |
1834 | codetext = cstring_appendChar (codetext, key); | |
1835 | modified = FALSE; | |
1836 | ignore = TRUE; | |
1837 | fileloc_incColumn (formatloc); | |
1838 | } | |
1839 | ||
1840 | /* ignore field width */ | |
1841 | while (isdigit ((int) key) != 0) | |
1842 | { | |
1843 | key = *(++code); | |
1844 | codetext = cstring_appendChar (codetext, key); | |
1845 | fileloc_incColumn (formatloc); | |
1846 | } | |
1847 | ||
1848 | if (key == 'h') | |
1849 | { | |
1850 | modtype = ctype_sint; /* short */ | |
1851 | key = *(++code); | |
1852 | codetext = cstring_appendChar (codetext, key); | |
1853 | fileloc_incColumn (formatloc); | |
1854 | } | |
1855 | else if (key == 'l' || key == 'L') | |
1856 | { | |
1857 | modtype = ctype_lint; /* long */ | |
1858 | modifier = key; | |
1859 | ||
1860 | key = *(++code); | |
1861 | codetext = cstring_appendChar (codetext, key); | |
1862 | ||
1863 | fileloc_incColumn (formatloc); | |
1864 | ||
1865 | if (key == 'l' || key == 'L') { | |
1866 | modtype = ctype_llint; /* long long */ | |
1867 | key = *(++code); | |
1868 | codetext = cstring_appendChar (codetext, key); | |
1869 | fileloc_incColumn (formatloc); | |
1870 | } | |
1871 | } | |
1872 | else | |
1873 | { | |
1874 | ; /* no modifier */ | |
1875 | } | |
1876 | ||
1877 | /* now, key = type of conversion to apply */ | |
1878 | ++code; | |
1879 | fileloc_incColumn (formatloc); | |
1880 | ||
1881 | if (key != '%') | |
1882 | { | |
1883 | if (ignore) | |
1884 | { | |
1885 | ; | |
1886 | } | |
1887 | else | |
1888 | { | |
1889 | if (i >= nargs) | |
1890 | { | |
1891 | if (optgenerror | |
1892 | (FLG_TYPE, | |
1893 | message ("No argument corresponding to %q format " | |
1894 | "code %d (%%%s): \"%s\"", | |
1895 | uentry_getName (fcn), | |
1896 | i, codetext, | |
1897 | cstring_fromChars (format)), | |
1898 | f->loc)) | |
1899 | { | |
1900 | if (fileloc_isDefined (formatloc) | |
1901 | && context_getFlag (FLG_SHOWCOL)) | |
1902 | { | |
1903 | llgenindentmsg | |
1904 | (cstring_makeLiteral ("Corresponding format code"), | |
1905 | formatloc); | |
1906 | } | |
1907 | } | |
1908 | i++; | |
1909 | } | |
1910 | else | |
1911 | { | |
1912 | a = exprNodeList_getN (args, i); | |
1913 | i++; | |
1914 | ||
1915 | if (!exprNode_isError (a)) | |
1916 | { | |
1917 | ctype expecttype; | |
1918 | ||
1919 | switch (key) | |
1920 | { | |
1921 | case '*': /* int argument for fieldwidth */ | |
1922 | expecttype = ctype_makePointer (ctype_int); | |
1923 | *(--code) = '%'; /* convert it for next code */ | |
1924 | fileloc_subColumn (formatloc, 1); | |
1925 | /*@switchbreak@*/ break; | |
1926 | case 'u': | |
1927 | case 'o': | |
1928 | expecttype = ctype_makePointer (ctype_combine (ctype_uint, modtype)); | |
1929 | /*@switchbreak@*/ break; | |
1930 | ||
1931 | case 'i': | |
1932 | case 'd': | |
1933 | case 'x': | |
1934 | case 'X': /* unsigned int */ | |
1935 | expecttype = ctype_makePointer (ctype_combine (ctype_int, modtype)); | |
1936 | /*@switchbreak@*/ break; | |
1937 | ||
1938 | case 'e': | |
1939 | case 'E': | |
1940 | case 'g': | |
1941 | case 'G': | |
1942 | case 'f': | |
1943 | /* printf is double, scanf is float! */ | |
1944 | ||
1945 | if (modifier == 'l') | |
1946 | { | |
1947 | expecttype = ctype_makePointer (ctype_double); | |
1948 | } | |
1949 | else if (modifier == 'L') | |
1950 | { | |
1951 | expecttype = ctype_makePointer (ctype_ldouble); | |
1952 | } | |
1953 | else | |
1954 | { | |
1955 | llassert (modifier == '\0'); | |
1956 | expecttype = ctype_makePointer (ctype_float); | |
1957 | } | |
1958 | /*@switchbreak@*/ break; | |
1959 | ||
1960 | case 'c': /* int converted to char (check its a char?) */ | |
1961 | expecttype = ctype_makePointer (ctype_makeConj (ctype_char, ctype_uchar)); | |
1962 | /*@switchbreak@*/ break; | |
1963 | ||
1964 | case 's': /* string */ | |
1965 | expecttype = ctype_string; | |
1966 | /*@switchbreak@*/ break; | |
1967 | ||
1968 | case '[': | |
1969 | /* skip to ']' */ | |
1970 | while (((key = *(++code)) != ']') | |
1971 | && (key != '\0')) | |
1972 | { | |
1973 | codetext = cstring_appendChar (codetext, key); | |
1974 | fileloc_incColumn (formatloc); | |
1975 | } | |
1976 | ||
1977 | if (key == '\0') | |
1978 | { | |
1979 | llfatalerrorLoc | |
1980 | (message ("Bad character set format: %s", | |
1981 | cstring_fromChars (origcode))); | |
1982 | } | |
1983 | ||
1984 | expecttype = ctype_string; | |
1985 | /*@switchbreak@*/ break; | |
1986 | ||
1987 | ||
1988 | case 'p': /* pointer */ | |
1989 | voptgenerror | |
1990 | (FLG_FORMATCODE, | |
1991 | message ("Format code should not be used in scanf: %s", | |
1992 | cstring_fromChars (origcode)), | |
1993 | fileloc_isDefined (formatloc) | |
1994 | ? formatloc : g_currentloc); | |
1995 | ||
1996 | expecttype = ctype_unknown; | |
1997 | /*@switchbreak@*/ break; | |
1998 | ||
1999 | case 'n': /* pointer to int, modified by call! */ | |
2000 | expecttype = ctype_makePointer (ctype_int); | |
2001 | /*@switchbreak@*/ break; | |
2002 | ||
2003 | default: | |
2004 | expecttype = ctype_unknown; | |
2005 | ||
2006 | voptgenerror | |
2007 | (FLG_FORMATCODE, | |
2008 | message ("Unrecognized format code: %s", | |
2009 | cstring_fromChars (origcode)), | |
2010 | fileloc_isDefined (formatloc) | |
2011 | ? formatloc : g_currentloc); | |
2012 | ||
2013 | /*@switchbreak@*/ break; | |
2014 | } | |
2015 | ||
2016 | if (!(exprNode_matchArgType (expecttype, a))) | |
2017 | { | |
2018 | if (ctype_isVoidPointer (expecttype) | |
2019 | && ctype_isRealAbstract (a->typ) | |
2020 | && (context_getFlag (FLG_ABSTVOIDP))) | |
2021 | { | |
2022 | ; | |
2023 | } | |
2024 | else | |
2025 | { | |
2026 | if (llgenformattypeerror | |
2027 | (expecttype, exprNode_undefined, | |
2028 | a->typ, a, | |
2029 | message ("Format argument %d to %q (%%%s) expects " | |
2030 | "%t gets %t: %s", | |
2031 | i - argno, | |
2032 | uentry_getName (fcn), | |
2033 | codetext, expecttype, | |
2034 | a->typ, exprNode_unparse (a)), | |
2035 | a->loc)) | |
2036 | { | |
2037 | if (fileloc_isDefined (formatloc) | |
2038 | && context_getFlag (FLG_SHOWCOL)) | |
2039 | { | |
2040 | llgenindentmsg | |
2041 | (cstring_makeLiteral | |
2042 | ("Corresponding format code"), | |
2043 | formatloc); | |
2044 | } | |
2045 | } | |
2046 | } | |
2047 | } | |
2048 | ||
2049 | uentry_setType (outArg, expecttype); | |
2050 | checkOneArg (outArg, a, f, FALSE, i+1, nargs); | |
2051 | uentry_setType (outArg, ctype_unknown); | |
2052 | uentry_fixupSref (outArg); | |
2053 | ||
2054 | if (modified) | |
2055 | { | |
2056 | exprNode_checkCallModifyVal (a->sref, args, f, ret); | |
2057 | } | |
2058 | } | |
2059 | else | |
2060 | { | |
2061 | /* a->sref = sRef_undefined; */ | |
2062 | } | |
2063 | } | |
2064 | } | |
2065 | } | |
2066 | ||
2067 | ocode = code; | |
2068 | cstring_free (codetext); | |
2069 | } | |
2070 | ||
2071 | if (i < nargs) | |
2072 | { | |
2073 | voptgenerror (FLG_TYPE, | |
2074 | message ("Format string for %q has %d arg%&, given %d", | |
2075 | uentry_getName (fcn), i - argno, nargs - argno), | |
2076 | f->loc); | |
2077 | } | |
2078 | } | |
2079 | else | |
2080 | { | |
2081 | /* no checking possible for compile-time unknown format strings */ | |
2082 | } | |
2083 | ||
2084 | fileloc_free (formatloc); | |
2085 | } | |
2086 | ||
2087 | static void | |
2088 | checkMessageArgs (/*@notnull@*/ /*@dependent@*/ exprNode f, | |
2089 | uentry fcn, | |
2090 | exprNodeList args, | |
2091 | /*@unused@*/ int argno) | |
2092 | { | |
2093 | /* | |
2094 | ** the last argument before the elips is the format string | |
2095 | */ | |
2096 | ||
2097 | int nargs = exprNodeList_size (args); | |
2098 | int i = argno; | |
2099 | fileloc formatloc; | |
2100 | exprNode a; | |
2101 | ||
2102 | a = exprNodeList_getN (args, argno - 1); | |
2103 | formatloc = fileloc_copy (exprNode_loc (a)); | |
2104 | ||
2105 | if (ctype_isUnknown (cstringType)) { | |
2106 | if (usymtab_existsType (cstring_makeLiteralTemp ("cstring"))) | |
2107 | { | |
2108 | cstringType = usymtab_lookupAbstractType (cstring_makeLiteralTemp ("cstring")); | |
2109 | } | |
2110 | } | |
2111 | ||
2112 | if (ctype_isUnknown (ctypeType)) { | |
2113 | if (usymtab_existsType (cstring_makeLiteralTemp ("ctype"))) | |
2114 | { | |
2115 | ctypeType = usymtab_lookupAbstractType (cstring_makeLiteralTemp ("ctype")); | |
2116 | } | |
2117 | } | |
2118 | ||
2119 | if (ctype_isUnknown (filelocType)) { | |
2120 | if (usymtab_existsType (cstring_makeLiteralTemp ("fileloc"))) | |
2121 | { | |
2122 | filelocType = usymtab_lookupAbstractType (cstring_makeLiteralTemp ("fileloc")); | |
2123 | } | |
2124 | } | |
2125 | ||
2126 | if (exprNode_isDefined (a) && exprNode_isStringLiteral (a) | |
2127 | && exprNode_knownStringValue (a)) | |
2128 | { | |
2129 | cstring format = multiVal_forceString (exprNode_getValue (a)); | |
2130 | char *code = cstring_toCharsSafe (format); | |
2131 | char *ocode = code; | |
2132 | ||
2133 | nargs = exprNodeList_size (args); | |
2134 | ||
2135 | while ((code = strchr (code, '%')) != NULL) | |
2136 | { | |
2137 | char *origcode = code; | |
2138 | char key = *(++code); | |
2139 | cstring codetext = cstring_newEmpty (); | |
2140 | bool isOnly = FALSE; | |
2141 | ||
2142 | codetext = cstring_appendChar (codetext, key); | |
2143 | ||
2144 | fileloc_addColumn (formatloc, code - ocode); | |
2145 | ||
2146 | while (key >= '0' && key <= '9') | |
2147 | { | |
2148 | key = *(++code); | |
2149 | codetext = cstring_appendChar (codetext, key); | |
2150 | fileloc_incColumn (formatloc); | |
2151 | } | |
2152 | ||
2153 | ++code; | |
2154 | fileloc_incColumn (formatloc); | |
2155 | ||
2156 | if (key != '%') | |
2157 | { | |
2158 | if (key == '&') /* plural marker */ | |
2159 | { | |
2160 | goto nextKey; | |
2161 | } | |
2162 | ||
2163 | if (i >= nargs) | |
2164 | { | |
2165 | voptgenerror | |
2166 | (FLG_TYPE, | |
2167 | message ("Message missing format arg %d (%%%s): \"%s\"", | |
2168 | i + 1, codetext, format), | |
2169 | f->loc); | |
2170 | i++; | |
2171 | } | |
2172 | else | |
2173 | { | |
2174 | a = exprNodeList_getN (args, i); | |
2175 | i++; | |
2176 | ||
2177 | nextKey: | |
2178 | if (!exprNode_isError (a)) | |
2179 | { | |
2180 | ctype expecttype; | |
2181 | ||
2182 | /*@-loopswitchbreak@*/ | |
2183 | ||
2184 | switch (key) | |
2185 | { | |
2186 | case 'c': | |
2187 | case 'h': | |
2188 | expecttype = ctype_char; break; | |
2189 | case 's': | |
2190 | expecttype = cstringType; break; | |
2191 | case 'q': | |
2192 | expecttype = cstringType; isOnly = TRUE; break; | |
2193 | case 'x': | |
2194 | expecttype = cstringType; isOnly = TRUE; break; | |
2195 | case 'd': expecttype = ctype_int; break; | |
2196 | case 'u': expecttype = ctype_uint; break; | |
2197 | case 'w': expecttype = ctype_ulint; break; | |
2198 | case 'f': expecttype = ctype_float; break; | |
2199 | case 'b': expecttype = ctype_bool; break; | |
2200 | case 't': expecttype = ctypeType; break; | |
2201 | case 'p': | |
2202 | expecttype = ctype_makePointer (ctype_void); | |
2203 | /* need not be defined */ | |
2204 | uentry_setDefState (regArg, SS_RELDEF); | |
2205 | sRef_setPosNull (uentry_getSref (regArg), | |
2206 | fileloc_undefined); | |
2207 | /* could be null */ | |
2208 | /*@switchbreak@*/ break; | |
2209 | case 'l': expecttype = filelocType; break; | |
2210 | case '&': /* a wee bit of a hack methinks */ | |
2211 | expecttype = ctype_int; | |
2212 | break; | |
2213 | case 'r': expecttype = ctype_bool; break; | |
2214 | default: | |
2215 | expecttype = ctype_unknown; | |
2216 | voptgenerror | |
2217 | (FLG_FORMATCODE, | |
2218 | message ("Unrecognized format code: %s", | |
2219 | cstring_fromChars (origcode)), | |
2220 | fileloc_isDefined (formatloc) | |
2221 | ? formatloc : g_currentloc); | |
2222 | break; | |
2223 | } | |
2224 | /*@=loopswitchbreak@*/ | |
2225 | ||
2226 | if (!(exprNode_matchArgType (expecttype, a))) | |
2227 | { | |
2228 | if (ctype_isVoidPointer (expecttype) | |
2229 | && ctype_isRealAbstract (a->typ) | |
2230 | && (context_getFlag (FLG_ABSTVOIDP))) | |
2231 | { | |
2232 | ; | |
2233 | } | |
2234 | else | |
2235 | { | |
2236 | if (llgenformattypeerror | |
2237 | (expecttype, exprNode_undefined, | |
2238 | a->typ, a, | |
2239 | message ("Format argument %d to %q (%%%s) expects " | |
2240 | "%t gets %t: %s", | |
2241 | i - argno, | |
2242 | uentry_getName (fcn), | |
2243 | codetext, expecttype, | |
2244 | a->typ, exprNode_unparse (a)), | |
2245 | a->loc)) | |
2246 | { | |
2247 | if (fileloc_isDefined (formatloc) | |
2248 | && context_getFlag (FLG_SHOWCOL)) | |
2249 | { | |
2250 | llgenindentmsg | |
2251 | (cstring_makeLiteral | |
2252 | ("Corresponding format code"), | |
2253 | formatloc); | |
2254 | } | |
2255 | } | |
2256 | } | |
2257 | } | |
2258 | ||
2259 | if (ctype_equal (expecttype, cstringType)) | |
2260 | { | |
2261 | if (isOnly) | |
2262 | { | |
2263 | checkOneArg (csOnlyArg, a, f, FALSE, i+1, nargs); | |
2264 | uentry_fixupSref (csOnlyArg); | |
2265 | } | |
2266 | else | |
2267 | { | |
2268 | checkOneArg (csArg, a, f, FALSE, i+1, nargs); | |
2269 | uentry_fixupSref (csArg); | |
2270 | } | |
2271 | } | |
2272 | else | |
2273 | { | |
2274 | checkOneArg (regArg, a, f, FALSE, i+1, nargs); | |
2275 | uentry_fixupSref (regArg); | |
2276 | } | |
2277 | } | |
2278 | } | |
2279 | } | |
2280 | ||
2281 | cstring_free (codetext); | |
2282 | } | |
2283 | ||
2284 | if (i < nargs) | |
2285 | { | |
2286 | voptgenerror (FLG_TYPE, | |
2287 | message ("Format string for %q has %d arg%&, given %d", | |
2288 | uentry_getName (fcn), i - argno, nargs -argno), | |
2289 | f->loc); | |
2290 | } | |
2291 | } | |
2292 | else | |
2293 | { | |
2294 | /* no checking possible for compile-time unknown format strings */ | |
2295 | } | |
2296 | ||
2297 | fileloc_free (formatloc); | |
2298 | } | |
2299 | ||
2300 | static void | |
2301 | checkExpressionDefinedAux (/*@notnull@*/ exprNode e1, | |
2302 | /*@notnull@*/ exprNode e2, | |
2303 | sRefSet sets1, | |
2304 | sRefSet sets2, | |
2305 | lltok op, | |
2306 | flagcode flag) | |
2307 | { | |
2308 | bool hadUncon = FALSE; | |
2309 | ||
2310 | if (sRef_isFileOrGlobalScope (sRef_getRootBase (e1->sref)) && | |
2311 | sRefSet_hasUnconstrained (sets2)) | |
2312 | { | |
2313 | voptgenerror | |
2314 | (FLG_EVALORDERUNCON, | |
2315 | message | |
2316 | ("Expression may have undefined behavior (%q used in right operand " | |
2317 | "may set global variable %q used in left operand): %s %s %s", | |
2318 | sRefSet_unparseUnconstrained (sets2), | |
2319 | sRef_unparse (sRef_getRootBase (e1->sref)), | |
2320 | exprNode_unparse (e1), lltok_unparse (op), exprNode_unparse (e2)), | |
2321 | e2->loc); | |
2322 | } | |
2323 | ||
2324 | if (sRef_isFileOrGlobalScope (sRef_getRootBase (e2->sref)) && | |
2325 | sRefSet_hasUnconstrained (sets1)) | |
2326 | { | |
2327 | voptgenerror | |
2328 | (FLG_EVALORDERUNCON, | |
2329 | message | |
2330 | ("Expression has undefined behavior (%q used in left operand " | |
2331 | "may set global variable %q used in right operand): %s %s %s", | |
2332 | sRefSet_unparseUnconstrained (sets1), | |
2333 | sRef_unparse (e2->sref), | |
2334 | exprNode_unparse (e1), lltok_unparse (op), exprNode_unparse (e2)), | |
2335 | e2->loc); | |
2336 | } | |
2337 | ||
2338 | sRefSet_realElements (e1->uses, sr) | |
2339 | { | |
2340 | if (sRef_isMeaningful (sr) && sRefSet_member (sets2, sr)) | |
2341 | { | |
2342 | voptgenerror | |
2343 | (FLG_EVALORDER, | |
2344 | message | |
2345 | ("Expression has undefined behavior (left operand uses %q, " | |
2346 | "modified by right operand): %s %s %s", | |
2347 | sRef_unparse (sr), | |
2348 | exprNode_unparse (e1), lltok_unparse (op), exprNode_unparse (e2)), | |
2349 | e2->loc); | |
2350 | } | |
2351 | } end_sRefSet_realElements; | |
2352 | ||
2353 | sRefSet_realElements (sets1, sr) | |
2354 | { | |
2355 | if (sRef_isMeaningful (sr)) | |
2356 | { | |
2357 | if (sRef_same (sr, e2->sref)) | |
2358 | { | |
2359 | voptgenerror | |
2360 | (flag, | |
2361 | message | |
2362 | ("Expression has undefined behavior (value of right operand " | |
2363 | "modified by left operand): %s %s %s", | |
2364 | exprNode_unparse (e1), lltok_unparse (op), exprNode_unparse (e2)), | |
2365 | e2->loc); | |
2366 | } | |
2367 | else if (sRefSet_member (e2->uses, sr)) | |
2368 | { | |
2369 | voptgenerror | |
2370 | (flag, | |
2371 | message | |
2372 | ("Expression has undefined behavior (left operand modifies %q, " | |
2373 | "used by right operand): %s %s %s", | |
2374 | sRef_unparse (sr), | |
2375 | exprNode_unparse (e1), lltok_unparse (op), exprNode_unparse (e2)), | |
2376 | e2->loc); | |
2377 | } | |
2378 | else | |
2379 | { | |
2380 | if (sRefSet_member (sets2, sr)) | |
2381 | { | |
2382 | if (sRef_isUnconstrained (sr)) | |
2383 | { | |
2384 | if (hadUncon) | |
2385 | { | |
2386 | ; | |
2387 | } | |
2388 | else | |
2389 | { | |
2390 | hadUncon = optgenerror | |
2391 | (FLG_EVALORDERUNCON, | |
2392 | message | |
2393 | ("Expression may have undefined behavior. Left operand " | |
2394 | "calls %q; right operand calls %q. The unconstrained " | |
2395 | "functions may modify global state used by " | |
2396 | "the other operand): %s %s %s", | |
2397 | sRefSet_unparseUnconstrained (sets1), | |
2398 | sRefSet_unparseUnconstrained (sets2), | |
2399 | exprNode_unparse (e1), lltok_unparse (op), | |
2400 | exprNode_unparse (e2)), | |
2401 | e2->loc); | |
2402 | } | |
2403 | } | |
2404 | else | |
2405 | { | |
2406 | voptgenerror | |
2407 | (flag, | |
2408 | message | |
2409 | ("Expression has undefined behavior (both " | |
2410 | "operands modify %q): %s %s %s", | |
2411 | sRef_unparse (sr), | |
2412 | exprNode_unparse (e1), | |
2413 | lltok_unparse (op), exprNode_unparse (e2)), | |
2414 | e2->loc); | |
2415 | } | |
2416 | } | |
2417 | } | |
2418 | } | |
2419 | } end_sRefSet_realElements; | |
2420 | } | |
2421 | ||
2422 | static void checkExpressionDefined (exprNode e1, exprNode e2, lltok op) | |
2423 | { | |
2424 | bool hasError = FALSE; | |
2425 | ||
2426 | if (exprNode_isError (e1) || exprNode_isError (e2)) | |
2427 | { | |
2428 | return; | |
2429 | } | |
2430 | ||
2431 | if (sRefSet_member (e2->sets, e1->sref)) | |
2432 | { | |
2433 | if (e2->kind == XPR_CALL) | |
2434 | { | |
2435 | ; | |
2436 | } | |
2437 | else | |
2438 | { | |
2439 | hasError = optgenerror | |
2440 | (FLG_EVALORDER, | |
2441 | message ("Expression has undefined behavior " | |
2442 | "(value of left operand %s is modified " | |
2443 | "by right operand %s): %s %s %s", | |
2444 | exprNode_unparse (e1), | |
2445 | exprNode_unparse (e2), | |
2446 | exprNode_unparse (e1), lltok_unparse (op), | |
2447 | exprNode_unparse (e2)), | |
2448 | e2->loc); | |
2449 | } | |
2450 | } | |
2451 | ||
2452 | if (context_getFlag (FLG_EVALORDERUNCON)) | |
2453 | { | |
2454 | if (sRefSet_member (e2->msets, e1->sref)) | |
2455 | { | |
2456 | if (e2->kind == XPR_CALL) | |
2457 | { | |
2458 | ; | |
2459 | } | |
2460 | else | |
2461 | { | |
2462 | hasError = optgenerror | |
2463 | (FLG_EVALORDER, | |
2464 | message | |
2465 | ("Expression has undefined behavior (value of left " | |
2466 | "operand may be modified by right operand): %s %s %s", | |
2467 | exprNode_unparse (e1), lltok_unparse (op), | |
2468 | exprNode_unparse (e2)), | |
2469 | e2->loc); | |
2470 | } | |
2471 | } | |
2472 | } | |
2473 | ||
2474 | if (!hasError) | |
2475 | { | |
2476 | checkExpressionDefinedAux (e1, e2, e1->sets, e2->sets, op, FLG_EVALORDER); | |
2477 | ||
2478 | if (context_maybeSet (FLG_EVALORDERUNCON)) | |
2479 | { | |
2480 | checkExpressionDefinedAux (e1, e2, e1->msets, | |
2481 | e2->msets, op, FLG_EVALORDERUNCON); | |
2482 | } | |
2483 | } | |
2484 | } | |
2485 | ||
2486 | static void checkSequencing (exprNode p_f, exprNodeList p_args); | |
2487 | ||
2488 | static int | |
2489 | checkArgsReal (uentry fcn, /*@dependent@*/ exprNode f, uentryList cl, | |
2490 | exprNodeList args, bool isIter, exprNode ret) | |
2491 | { | |
2492 | int special = 0; | |
2493 | ||
2494 | if (!exprNode_isError (f)) | |
2495 | { | |
2496 | if (!uentryList_isMissingParams (cl)) | |
2497 | { | |
2498 | int nargs = exprNodeList_size (args); | |
2499 | int expectargs = uentryList_size (cl); | |
2500 | ctype last; | |
2501 | int i = 0; | |
2502 | ||
2503 | if (expectargs == 0) | |
2504 | { | |
2505 | if (nargs != 0) | |
2506 | { | |
2507 | if (isIter) | |
2508 | { | |
2509 | voptgenerror | |
2510 | (FLG_TYPE, | |
2511 | message ("Iter %q invoked with %d args, " | |
2512 | "declared void", | |
2513 | uentry_getName (fcn), | |
2514 | nargs), | |
2515 | f->loc); | |
2516 | } | |
2517 | else | |
2518 | { | |
2519 | voptgenerror | |
2520 | (FLG_TYPE, | |
2521 | message ("Function %s called with %d args, " | |
2522 | "declared void", | |
2523 | exprNode_unparse (f), nargs), | |
2524 | f->loc); | |
2525 | } | |
2526 | } | |
2527 | return special; | |
2528 | } | |
2529 | ||
2530 | last = uentry_getType (uentryList_getN (cl, expectargs - 1)); | |
2531 | ||
2532 | exprNodeList_reset (args); | |
2533 | ||
2534 | uentryList_elements (cl, current) | |
2535 | { | |
2536 | ctype ct = uentry_getType (current); | |
2537 | exprNode a; | |
2538 | ||
2539 | if (ctype_isElips (ct)) | |
2540 | { | |
2541 | /* | |
2542 | ** do special checking for printf/scanf library functions | |
2543 | ** | |
2544 | ** this is kludgey code, just for handling the special case | |
2545 | ** | |
2546 | */ | |
2547 | ||
2548 | if (uentry_isPrintfLike (fcn)) | |
2549 | { | |
2550 | checkPrintfArgs (f, fcn, args, ret, i); | |
2551 | special = i; | |
2552 | } | |
2553 | else if (uentry_isScanfLike (fcn)) | |
2554 | { | |
2555 | checkScanfArgs (f, fcn, args, ret, i); | |
2556 | special = i; | |
2557 | } | |
2558 | else if (uentry_isMessageLike (fcn)) | |
2559 | { | |
2560 | checkMessageArgs (f, fcn, args, i); | |
2561 | special = i; | |
2562 | } | |
2563 | else | |
2564 | { | |
2565 | llassert (!uentry_isSpecialFunction (fcn)); | |
2566 | } | |
2567 | ||
2568 | nargs = expectargs; /* avoid errors */ | |
2569 | break; | |
2570 | } | |
2571 | else | |
2572 | { | |
2573 | if (i >= nargs) break; | |
2574 | ||
2575 | a = exprNodeList_current (args); | |
2576 | exprNodeList_advance (args); | |
2577 | ||
2578 | i++; | |
2579 | ||
2580 | if (exprNode_isError (a)) | |
2581 | { | |
2582 | ; | |
2583 | } | |
2584 | else | |
2585 | { | |
2586 | /* | |
2587 | probably necessary? I'm not sure about this one | |
2588 | checkMacroParen (a); | |
2589 | */ | |
2590 | ||
2591 | f->guards = guardSet_union (f->guards, a->guards); | |
2592 | ||
2593 | DPRINTF (("match arg: %s / %s", ctype_unparse (ct), ctype_unparse (a->typ))); | |
2594 | ||
2595 | if (!(exprNode_matchArgType (ct, a))) | |
2596 | { | |
2597 | DPRINTF (("Args mismatch!")); | |
2598 | ||
2599 | if (ctype_isVoidPointer (ct) | |
2600 | && (ctype_isPointer (a->typ) | |
2601 | && (ctype_isRealAbstract (ctype_baseArrayPtr (a->typ))))) | |
2602 | { | |
2603 | vnoptgenerror | |
2604 | (FLG_ABSTVOIDP, | |
2605 | message | |
2606 | ("Pointer to abstract type (%t) used " | |
2607 | "as void pointer " | |
2608 | "(arg %d to %q): %s", | |
2609 | a->typ, i, | |
2610 | uentry_getName (fcn), | |
2611 | exprNode_unparse (a)), | |
2612 | a->loc); | |
2613 | } | |
2614 | else | |
2615 | { | |
2616 | if (isIter) | |
2617 | { | |
2618 | (void) gentypeerror | |
2619 | (ct, exprNode_undefined, | |
2620 | a->typ, a, | |
2621 | message | |
2622 | ("Iter %q expects arg %d to " | |
2623 | "be %t gets %t: %s", | |
2624 | uentry_getName (fcn), | |
2625 | i, ct, a->typ, exprNode_unparse (a)), | |
2626 | a->loc); | |
2627 | } | |
2628 | else | |
2629 | { | |
2630 | if (gentypeerror | |
2631 | (ct, | |
2632 | exprNode_undefined, | |
2633 | a->typ, | |
2634 | a, | |
2635 | message | |
2636 | ("Function %q expects arg %d to be %t gets %t: %s", | |
2637 | uentry_getName (fcn), | |
2638 | i, ct, a->typ, exprNode_unparse (a)), | |
2639 | a->loc)) | |
2640 | { | |
2641 | DPRINTF (("Types: %s / %s", | |
2642 | ctype_unparse (ct), | |
2643 | ctype_unparse (a->typ))); | |
2644 | } | |
2645 | ||
2646 | /* | |
2647 | ** Clear null marker for abstract types. | |
2648 | ** (It is not revealed, so suppress future messages.) | |
2649 | */ | |
2650 | ||
2651 | if (ctype_isAbstract (a->typ)) | |
2652 | { | |
2653 | sRef_setNullUnknown (exprNode_getSref (a), a->loc); | |
2654 | } | |
2655 | } | |
2656 | } | |
2657 | } | |
2658 | } | |
2659 | } | |
2660 | } end_uentryList_elements ; | |
2661 | ||
2662 | ||
2663 | if (expectargs != nargs) /* note: not != since we may have ... */ | |
2664 | { | |
2665 | if (ctype_isElips (last)) | |
2666 | { | |
2667 | voptgenerror | |
2668 | (FLG_TYPE, | |
2669 | message ("Function %s called with %d args, expects at least %d", | |
2670 | exprNode_unparse (f), | |
2671 | nargs, expectargs - 1), | |
2672 | f->loc); | |
2673 | } | |
2674 | else | |
2675 | { | |
2676 | if (isIter) | |
2677 | { | |
2678 | voptgenerror | |
2679 | (FLG_TYPE, | |
2680 | message ("Iter %q invoked with %d args, expects %d", | |
2681 | uentry_getName (fcn), nargs, expectargs), | |
2682 | f->loc); | |
2683 | } | |
2684 | else | |
2685 | { | |
2686 | voptgenerror | |
2687 | (FLG_TYPE, | |
2688 | message ("Function %s called with %d args, expects %d", | |
2689 | exprNode_unparse (f), | |
2690 | nargs, expectargs), | |
2691 | f->loc); | |
2692 | } | |
2693 | } | |
2694 | } | |
2695 | } | |
2696 | } | |
2697 | ||
2698 | return special; | |
2699 | } | |
2700 | ||
2701 | /* | |
2702 | ** Check for undefined code sequences in function arguments: | |
2703 | ** | |
2704 | ** one parameter sets something used by another parameter | |
2705 | ** one parameter sets something set by another parameter | |
2706 | */ | |
2707 | ||
2708 | static void | |
2709 | checkSequencingOne (exprNode f, exprNodeList args, | |
2710 | /*@notnull@*/ exprNode el, int argno) | |
2711 | { | |
2712 | /* | |
2713 | ** Do second loop, iff +undefunspec | |
2714 | */ | |
2715 | ||
2716 | int checkloop; | |
2717 | int numloops = context_maybeSet (FLG_EVALORDERUNCON) ? 2 : 1; | |
2718 | ||
2719 | for (checkloop = 0; checkloop < numloops; checkloop++) | |
2720 | { | |
2721 | sRefSet thissets; | |
2722 | ||
2723 | if (checkloop == 0) | |
2724 | { | |
2725 | thissets = el->sets; | |
2726 | } | |
2727 | else | |
2728 | { | |
2729 | llassert (checkloop == 1); | |
2730 | thissets = el->msets; | |
2731 | } | |
2732 | ||
2733 | sRefSet_realElements (thissets, thisset) | |
2734 | { | |
2735 | int j; | |
2736 | ||
2737 | /*@access exprNodeList@*/ | |
2738 | for (j = 0; j < args->nelements; j++) | |
2739 | { | |
2740 | exprNode jl = args->elements[j]; | |
2741 | int thisargno = j + 1; | |
2742 | ||
2743 | if (thisargno != argno && exprNode_isDefined (jl)) | |
2744 | { | |
2745 | sRefSet otheruses = jl->uses; | |
2746 | ||
2747 | if (sRef_isFileOrGlobalScope (sRef_getRootBase (jl->sref)) && | |
2748 | sRefSet_hasUnconstrained (thissets)) | |
2749 | { | |
2750 | voptgenerror | |
2751 | (FLG_EVALORDERUNCON, | |
2752 | /*@-sefparams@*/ | |
2753 | message | |
2754 | ("%q used in argument %d may set " | |
2755 | "global variable %q used by argument %d: %s(%q)", | |
2756 | cstring_capitalizeFree (sRefSet_unparseUnconstrained (thissets)), | |
2757 | /*@=sefparams@*/ | |
2758 | argno, | |
2759 | sRef_unparse (sRef_getRootBase (jl->sref)), | |
2760 | thisargno, | |
2761 | exprNode_unparse (f), exprNodeList_unparse (args)), | |
2762 | el->loc); | |
2763 | } | |
2764 | ||
2765 | if (sRefSet_member (otheruses, thisset)) | |
2766 | { | |
2767 | if (sRef_isUnconstrained (thisset)) | |
2768 | { | |
2769 | voptgenerror | |
2770 | (FLG_EVALORDERUNCON, | |
2771 | message | |
2772 | ("Unconstrained functions used in arguments %d (%q) " | |
2773 | "and %d (%s) may modify " | |
2774 | "or use global state in undefined way: %s(%q)", | |
2775 | argno, | |
2776 | sRefSet_unparseUnconstrainedPlain (otheruses), | |
2777 | thisargno, | |
2778 | sRef_unconstrainedName (thisset), | |
2779 | exprNode_unparse (f), | |
2780 | exprNodeList_unparse (args)), | |
2781 | el->loc); | |
2782 | } | |
2783 | else | |
2784 | { | |
2785 | voptgenerror | |
2786 | (FLG_EVALORDER, | |
2787 | message | |
2788 | ("Argument %d modifies %q, used by argument %d " | |
2789 | "(order of evaluation of actual parameters is " | |
2790 | "undefined): %s(%q)", | |
2791 | argno, sRef_unparse (thisset), thisargno, | |
2792 | exprNode_unparse (f), exprNodeList_unparse (args)), | |
2793 | el->loc); | |
2794 | } | |
2795 | } | |
2796 | else | |
2797 | { | |
2798 | sRefSet othersets = jl->sets; | |
2799 | ||
2800 | if (sRefSet_member (othersets, thisset)) | |
2801 | { | |
2802 | if (sRef_isUnconstrained (thisset)) | |
2803 | { | |
2804 | voptgenerror | |
2805 | (FLG_EVALORDERUNCON, | |
2806 | message | |
2807 | ("Unconstrained functions used in " | |
2808 | "arguments %d (%q) and %d (%s) may modify " | |
2809 | "or use global state in undefined way: %s(%q)", | |
2810 | argno, | |
2811 | sRefSet_unparseUnconstrainedPlain (othersets), | |
2812 | thisargno, | |
2813 | sRef_unconstrainedName (thisset), | |
2814 | exprNode_unparse (f), exprNodeList_unparse (args)), | |
2815 | el->loc); | |
2816 | } | |
2817 | else | |
2818 | { | |
2819 | voptgenerror | |
2820 | (FLG_EVALORDER, | |
2821 | message | |
2822 | ("Argument %d modifies %q, set by argument %d (order of" | |
2823 | " evaluation of actual parameters is undefined): %s(%q)", | |
2824 | argno, sRef_unparse (thisset), thisargno, | |
2825 | exprNode_unparse (f), exprNodeList_unparse (args)), | |
2826 | el->loc); | |
2827 | } | |
2828 | } | |
2829 | } | |
2830 | } | |
2831 | } | |
2832 | /*@noaccess exprNodeList@*/ | |
2833 | } end_sRefSet_realElements; | |
2834 | } | |
2835 | } | |
2836 | ||
2837 | static void | |
2838 | checkSequencing (exprNode f, exprNodeList args) | |
2839 | { | |
2840 | if (exprNodeList_size (args) > 1) | |
2841 | { | |
2842 | int i; | |
2843 | exprNode el; | |
2844 | ||
2845 | /*@access exprNodeList*/ | |
2846 | ||
2847 | for (i = 0; i < args->nelements; i++) | |
2848 | { | |
2849 | el = args->elements[i]; | |
2850 | ||
2851 | if (!exprNode_isError (el)) | |
2852 | { | |
2853 | checkSequencingOne (f, args, el, i + 1); | |
2854 | } | |
2855 | } | |
2856 | /*@noaccess exprNodeList*/ | |
2857 | } | |
2858 | } | |
2859 | ||
2860 | /* | |
2861 | ** requires le = exprNode_getUentry (f) | |
2862 | */ | |
2863 | ||
2864 | static void | |
2865 | checkGlobMods (/*@notnull@*/ /*@dependent@*/ exprNode f, | |
2866 | uentry le, exprNodeList args, | |
2867 | /*@notnull@*/ exprNode ret, int specialArgs) | |
2868 | { | |
2869 | bool isSpec = FALSE; | |
2870 | bool hasMods = FALSE; | |
2871 | cstring fname; | |
2872 | globSet usesGlobs = globSet_undefined; | |
2873 | sRefSet mods = sRefSet_undefined; | |
2874 | bool freshMods = FALSE; | |
2875 | uentryList params = uentryList_undefined; | |
2876 | ||
2877 | DPRINTF (("Check glob mods: %s", exprNode_unparse (ret))); | |
2878 | ||
2879 | /* | |
2880 | ** check globals and modifies | |
2881 | */ | |
2882 | ||
2883 | setCodePoint (); | |
2884 | ||
2885 | if (!uentry_isValid (le)) | |
2886 | { | |
2887 | ctype fr = ctype_realType (f->typ); | |
2888 | ||
2889 | if (ctype_isFunction (fr)) | |
2890 | { | |
2891 | params = ctype_argsFunction (fr); | |
2892 | } | |
2893 | else | |
2894 | { | |
2895 | params = uentryList_missingParams; | |
2896 | } | |
2897 | ||
2898 | if (!context_getFlag (FLG_MODNOMODS) | |
2899 | && !context_getFlag (FLG_GLOBUNSPEC)) | |
2900 | { | |
2901 | checkUnspecCall (f, params, args); | |
2902 | } | |
2903 | ||
2904 | return; | |
2905 | } | |
2906 | ||
2907 | fname = uentry_rawName (le); | |
2908 | ||
2909 | setCodePoint (); | |
2910 | ||
2911 | if (uentry_isFunction (le)) | |
2912 | { | |
2913 | params = uentry_getParams (le); | |
2914 | mods = uentry_getMods (le); | |
2915 | hasMods = uentry_hasMods (le); | |
2916 | usesGlobs = uentry_getGlobs (le); | |
2917 | isSpec = uentry_isSpecified (le); | |
2918 | } | |
2919 | else /* not a function */ | |
2920 | { | |
2921 | ctype ct = ctype_realType (uentry_getType (le)); | |
2922 | ||
2923 | llassertprint (uentry_isVar (le) && ctype_isFunction (ct), | |
2924 | ("checkModGlobs: uentry not a function: %s", | |
2925 | uentry_unparse (le))); | |
2926 | ||
2927 | params = ctype_argsFunction (ct); | |
2928 | return; /*@32 ! remove this? */ | |
2929 | } | |
2930 | ||
2931 | /* | |
2932 | ** check globals | |
2933 | */ | |
2934 | ||
2935 | setCodePoint (); | |
2936 | ||
2937 | globSet_allElements (usesGlobs, el) | |
2938 | { | |
2939 | if (sRef_isValid (el)) | |
2940 | { | |
2941 | if (sRef_isInternalState (el) || sRef_isSystemState (el)) | |
2942 | { | |
2943 | context_usedGlobal (el); | |
2944 | exprNode_checkUse (f, el, f->loc); | |
2945 | ||
2946 | if (context_checkInternalUse ()) | |
2947 | { | |
2948 | if (!context_globAccess (el)) | |
2949 | { | |
2950 | if (sRef_isSystemState (el) | |
2951 | && !context_getFlag (FLG_MODFILESYSTEM)) | |
2952 | { | |
2953 | ; | |
2954 | } | |
2955 | else | |
2956 | { | |
2957 | voptgenerror | |
2958 | (FLG_INTERNALGLOBS, | |
2959 | message | |
2960 | ("Called procedure %s may access %q, but " | |
2961 | "globals list does not include globals %s", | |
2962 | exprNode_unparse (f), | |
2963 | sRef_unparse (el), | |
2964 | cstring_makeLiteralTemp (sRef_isInternalState (el) | |
2965 | ? "internalState" | |
2966 | : "fileSystem")), | |
2967 | f->loc); | |
2968 | } | |
2969 | } | |
2970 | } | |
2971 | } | |
2972 | else if (sRef_isNothing (el) || sRef_isSpecState (el)) | |
2973 | { | |
2974 | ; | |
2975 | } | |
2976 | else | |
2977 | { | |
2978 | uentry gle = sRef_getUentry (el); | |
2979 | sRef sr = sRef_updateSref (el); | |
2980 | ||
2981 | if (sRef_isUndefGlob (el)) | |
2982 | { | |
2983 | sRef_setDefined (sr, f->loc); | |
2984 | exprNode_checkSet (f, sr); | |
2985 | } | |
2986 | else | |
2987 | { | |
2988 | /* | |
2989 | ** check definition | |
2990 | */ | |
2991 | ||
2992 | if (sRef_isAllocated (el)) | |
2993 | { | |
2994 | exprNode_checkSet (f, sr); | |
2995 | } | |
2996 | else | |
2997 | { | |
2998 | if (sRef_isStateUndefined (sr)) | |
2999 | { | |
3000 | voptgenerror | |
3001 | (FLG_GLOBSTATE, | |
3002 | message | |
3003 | ("%s %q used by function undefined before call: %s", | |
3004 | sRef_getScopeName (sr), | |
3005 | sRef_unparse (sr), | |
3006 | exprNode_unparse (f)), | |
3007 | f->loc); | |
3008 | sRef_setDefined (sr, f->loc); | |
3009 | } | |
3010 | exprNode_checkUse (f, sr, f->loc); | |
3011 | } | |
3012 | ||
3013 | checkGlobUse (gle, TRUE, f); | |
3014 | } | |
3015 | ||
3016 | if (sRef_isKilledGlob (el)) | |
3017 | { | |
3018 | sRef_kill (sr, f->loc); | |
3019 | context_usedGlobal (sr); | |
3020 | } | |
3021 | } | |
3022 | } | |
3023 | } end_globSet_allElements; | |
3024 | ||
3025 | /* | |
3026 | ** check modifies | |
3027 | */ | |
3028 | ||
3029 | if (context_hasMods () || context_getFlag (FLG_MODNOMODS)) | |
3030 | { | |
3031 | sRefSet smods = sRefSet_undefined; | |
3032 | ||
3033 | /* | |
3034 | ** NEED to check for modifies anything | |
3035 | */ | |
3036 | ||
3037 | /* | |
3038 | ** check each sRef that called function modifies (ml), is | |
3039 | ** modifiable by tl | |
3040 | */ | |
3041 | ||
3042 | setCodePoint (); | |
3043 | ||
3044 | sRefSet_allElements (mods, s) /* s is something which may be modified */ | |
3045 | { | |
3046 | DPRINTF (("Check modify: %s", sRef_unparse (s))); | |
3047 | ||
3048 | if (sRef_isKindSpecial (s)) | |
3049 | { | |
3050 | if (sRef_isSpecInternalState (s)) | |
3051 | { | |
3052 | if (context_getFlag (FLG_MODINTERNALSTRICT)) | |
3053 | { | |
3054 | exprNode_checkCallModifyVal (s, args, f, ret); | |
3055 | } | |
3056 | else | |
3057 | { | |
3058 | sRefSet mmods = context_modList (); | |
3059 | ||
3060 | sRefSet_allElements (mmods, el) | |
3061 | { | |
3062 | if (sRef_isInternalState (el)) | |
3063 | { | |
3064 | sRef_setModified (el); | |
3065 | } | |
3066 | } end_sRefSet_allElements ; | |
3067 | } | |
3068 | } | |
3069 | else | |
3070 | { | |
3071 | exprNode_checkCallModifyVal (s, args, f, ret); | |
3072 | } | |
3073 | } | |
3074 | else | |
3075 | { | |
3076 | sRef rb = sRef_getRootBase (s); | |
3077 | ||
3078 | if (sRef_isFileOrGlobalScope (rb)) | |
3079 | { | |
3080 | context_usedGlobal (rb); | |
3081 | } | |
3082 | ||
3083 | if (sRef_isFileStatic (s) | |
3084 | && !fileId_equal (fileloc_fileId (f->loc), | |
3085 | fileloc_fileId (uentry_whereDefined (le)))) | |
3086 | { | |
3087 | smods = sRefSet_insert (smods, s); | |
3088 | } | |
3089 | else | |
3090 | { | |
3091 | exprNode_checkCallModifyVal (s, args, f, ret); | |
3092 | } | |
3093 | } | |
3094 | } end_sRefSet_allElements; | |
3095 | ||
3096 | setCodePoint (); | |
3097 | ||
3098 | /* | |
3099 | ** Static elements in modifies set can have nasty consequences. | |
3100 | ** (I think...have not been able to reproduce a possible bug.) | |
3101 | */ | |
3102 | ||
3103 | if (!sRefSet_isDefined (smods)) | |
3104 | { | |
3105 | mods = sRefSet_newCopy (mods); | |
3106 | freshMods = TRUE; | |
3107 | ||
3108 | sRefSet_allElements (smods, el) | |
3109 | { | |
3110 | bool res = sRefSet_delete (mods, el); | |
3111 | ||
3112 | llassert (res); | |
3113 | } end_sRefSet_allElements; | |
3114 | ||
3115 | sRefSet_free (smods); | |
3116 | /*@-branchstate@*/ | |
3117 | } | |
3118 | /*@=branchstate@*/ | |
3119 | } | |
3120 | else if (sRefSet_isDefined (mods)) | |
3121 | { /* just check observers */ | |
3122 | setCodePoint (); | |
3123 | ||
3124 | sRefSet_allElements (mods, s) /* s is something which may be modified */ | |
3125 | { | |
3126 | sRef rb = sRef_getRootBase (s); | |
3127 | ||
3128 | setCodePoint (); | |
3129 | ||
3130 | if (sRef_isParam (rb)) | |
3131 | { | |
3132 | sRef b = sRef_fixBaseParam (s, args); | |
3133 | ||
3134 | if (sRef_isObserver (b)) | |
3135 | { | |
3136 | exprNode e = exprNodeList_nth (args, usymId_toInt (sRef_getParam (rb))); | |
3137 | ||
3138 | if (optgenerror | |
3139 | (FLG_MODOBSERVER, | |
3140 | message ("Function call may modify observer%q: %s", | |
3141 | sRef_unparsePreOpt (b), exprNode_unparse (e)), | |
3142 | exprNode_loc (e))) | |
3143 | { | |
3144 | sRef_showExpInfo (b); | |
3145 | } | |
3146 | } | |
3147 | } | |
3148 | } end_sRefSet_allElements; | |
3149 | } | |
3150 | else | |
3151 | { | |
3152 | if (!hasMods) /* no specified modifications */ | |
3153 | { | |
3154 | if (context_getFlag (FLG_MODOBSERVERUNCON)) | |
3155 | { | |
3156 | exprNodeList_elements (args, e) | |
3157 | { | |
3158 | if (exprNode_isDefined (e)) | |
3159 | { | |
3160 | sRef s = exprNode_getSref (e); | |
3161 | ||
3162 | if (sRef_isObserver (s) | |
3163 | && ctype_isMutable (sRef_getType (s))) | |
3164 | { | |
3165 | if (optgenerror | |
3166 | (FLG_MODOBSERVERUNCON, | |
3167 | message | |
3168 | ("Call to unconstrained function %s may modify observer%q: %s", | |
3169 | exprNode_unparse (f), | |
3170 | sRef_unparsePreOpt (s), exprNode_unparse (e)), | |
3171 | exprNode_loc (e))) | |
3172 | { | |
3173 | sRef_showExpInfo (s); | |
3174 | } | |
3175 | } | |
3176 | } | |
3177 | } end_exprNodeList_elements; | |
3178 | } | |
3179 | } | |
3180 | } | |
3181 | ||
3182 | checkAnyCall (f, fname, params, args, hasMods, mods, isSpec, specialArgs); | |
3183 | ||
3184 | ret->uses = sRefSet_union (ret->uses, f->uses); | |
3185 | ret->sets = sRefSet_union (ret->sets, f->sets); | |
3186 | ret->msets = sRefSet_union (ret->msets, f->msets); | |
3187 | ||
3188 | if (freshMods) | |
3189 | { | |
3190 | /* | |
3191 | ** Spurious errors reported, because splint can't tell | |
3192 | ** mods must be fresh if freshMods is true. | |
3193 | */ | |
3194 | ||
3195 | /*@i@*/ sRefSet_free (mods); | |
3196 | } | |
3197 | ||
3198 | setCodePoint (); | |
3199 | } | |
3200 | ||
3201 | void checkGlobUse (uentry glob, bool isCall, /*@notnull@*/ exprNode e) | |
3202 | { | |
3203 | if (uentry_isVar (glob)) | |
3204 | { | |
3205 | if (context_inFunctionLike ()) | |
3206 | { | |
3207 | sRef sr = uentry_getSref (glob); | |
3208 | ||
3209 | context_usedGlobal (sr); | |
3210 | ||
3211 | if (context_checkGlobUse (glob)) | |
3212 | { | |
3213 | if (!context_globAccess (sr)) | |
3214 | { | |
3215 | if (isCall) | |
3216 | { | |
3217 | voptgenerror | |
3218 | (FLG_GLOBALS, | |
3219 | message ("Called procedure %s may access %s %q", | |
3220 | exprNode_unparse (e), | |
3221 | sRef_unparseScope (sr), | |
3222 | uentry_getName (glob)), | |
3223 | e->loc); | |
3224 | } | |
3225 | else | |
3226 | { | |
3227 | voptgenerror | |
3228 | (FLG_GLOBALS, | |
3229 | message ("Undocumented use of %s %s", | |
3230 | sRef_unparseScope (sr), | |
3231 | exprNode_unparse (e)), | |
3232 | e->loc); | |
3233 | } | |
3234 | } | |
3235 | } | |
3236 | } | |
3237 | } | |
3238 | else | |
3239 | { | |
3240 | llbug (message ("Global not variable: %q", uentry_unparse (glob))); | |
3241 | } | |
3242 | } | |
3243 | ||
3244 | static void | |
3245 | reflectEnsuresClause (exprNode ret, uentry le, exprNode f, exprNodeList args) | |
3246 | { | |
3247 | DPRINTF (("Reflect ensures clause: %s(%s) / %s / %s", | |
3248 | exprNode_unparse (f), exprNodeList_unparse (args), | |
3249 | uentry_unparseFull (le), | |
3250 | stateClauseList_unparse (uentry_getStateClauseList (le)))); | |
3251 | ||
3252 | if (uentry_isValid (le) && uentry_isFunction (le)) | |
3253 | { | |
3254 | stateClauseList sclauses = uentry_getStateClauseList (le); | |
3255 | ||
3256 | if (stateClauseList_isDefined (sclauses)) | |
3257 | { | |
3258 | DPRINTF (("Reflect ensures: %s / %s / %s", | |
3259 | uentry_unparse (le), | |
3260 | exprNode_unparse (f), exprNodeList_unparse (args))); | |
3261 | ||
3262 | stateClauseList_elements (sclauses, cl) | |
3263 | { | |
3264 | if (stateClause_hasEnsures (cl)) | |
3265 | { | |
3266 | /* Same in usymtab.c:1904 */ | |
3267 | if (stateClause_setsMetaState (cl)) | |
3268 | { | |
3269 | qual q = stateClause_getMetaQual (cl); | |
3270 | annotationInfo ainfo = qual_getAnnotationInfo (q); | |
3271 | metaStateInfo minfo = annotationInfo_getState (ainfo); | |
3272 | cstring key = metaStateInfo_getName (minfo); | |
3273 | int mvalue = annotationInfo_getValue (ainfo); | |
3274 | ||
3275 | sRefSet osrs = sRefSet_undefined; | |
3276 | sRefSet srs; | |
3277 | ||
3278 | if (stateClause_isGlobal (cl)) | |
3279 | { | |
3280 | srs = sRefSet_single (usymtab_lookupGlobalMarker ()); | |
3281 | osrs = srs; | |
3282 | } | |
3283 | else | |
3284 | { | |
3285 | srs = stateClause_getRefs (cl); | |
3286 | } | |
3287 | ||
3288 | DPRINTF (("Reflect ensures clause: %s", stateClause_unparse (cl))); | |
3289 | ||
3290 | ||
3291 | DPRINTF (("Sets meta state! %s", stateClause_unparse (cl))); | |
3292 | ||
3293 | sRefSet_elements (srs, sel) | |
3294 | { | |
3295 | sRef s; | |
3296 | ||
3297 | if (sRef_isResult (sRef_getRootBase (sel))) | |
3298 | { | |
3299 | s = exprNode_getSref (ret); | |
3300 | } | |
3301 | else | |
3302 | { | |
3303 | s = sRef_fixBaseParam (sel, args); | |
3304 | } | |
3305 | ||
3306 | DPRINTF (("Reflecting state clause on: %s / %s", | |
3307 | sRef_unparse (sel), sRef_unparse (s))); | |
3308 | ||
3309 | sRef_setMetaStateValueComplete (s, key, mvalue, exprNode_loc (f)); | |
3310 | } end_sRefSet_elements; | |
3311 | ||
3312 | sRefSet_free (osrs); | |
3313 | } | |
3314 | else | |
3315 | { | |
3316 | sRefSet srs = stateClause_getRefs (cl); | |
3317 | sRefModVal modf = stateClause_getEnsuresFunction (cl); | |
3318 | int eparam = stateClause_getStateParameter (cl); | |
3319 | ||
3320 | llassert (modf != NULL); | |
3321 | ||
3322 | DPRINTF (("Reflect after clause: %s / %s", | |
3323 | stateClause_unparse (cl), | |
3324 | sRefSet_unparse (srs))); | |
3325 | ||
3326 | sRefSet_elements (srs, sel) | |
3327 | { | |
3328 | sRef s; | |
3329 | ||
3330 | DPRINTF (("elements: %s", sRef_unparse (sel))); | |
3331 | DPRINTF (("elements: %s", sRef_unparseFull (sel))); | |
3332 | ||
3333 | if (sRef_isResult (sRef_getRootBase (sel))) | |
3334 | { | |
3335 | DPRINTF (("Fix base: %s / %s", | |
3336 | sRef_unparse (sel), sRef_unparse (exprNode_getSref (ret)))); | |
3337 | s = sRef_fixBase (sel, exprNode_getSref (ret)); | |
3338 | DPRINTF (("==> %s", sRef_unparseFull (s))); | |
3339 | } | |
3340 | else | |
3341 | { | |
3342 | s = sRef_fixBaseParam (sel, args); | |
3343 | } | |
3344 | ||
3345 | DPRINTF (("elements: %s", sRef_unparse (s))); | |
3346 | DPRINTF (("elements: %s", sRef_unparseFull (s))); | |
3347 | ||
3348 | DPRINTF (("Reflecting state clause on: %s / %s", | |
3349 | sRef_unparseFull (sel), sRef_unparseFull (s))); | |
3350 | ||
3351 | /* evans 2001-08-24 - added aliasSetCompleteParam */ | |
3352 | sRef_aliasSetCompleteParam (modf, s, eparam, exprNode_loc (f)); | |
3353 | ||
3354 | DPRINTF (("After reflecting state clause on: %s / %s", | |
3355 | sRef_unparseFull (sel), sRef_unparseFull (s))); | |
3356 | } end_sRefSet_elements; | |
3357 | } | |
3358 | } | |
3359 | } end_stateClauseList_elements ; | |
3360 | } | |
3361 | ||
3362 | DPRINTF (("Here: %s / %s", | |
3363 | uentry_unparseFull (le), | |
3364 | bool_unparse (uentry_hasMetaStateEnsures (le)))); | |
3365 | ||
3366 | if (uentry_hasMetaStateEnsures (le)) | |
3367 | { | |
3368 | fileloc loc = exprNode_loc (f); | |
3369 | ||
3370 | metaStateConstraintList mscl = uentry_getMetaStateEnsures (le); | |
3371 | ||
3372 | metaStateConstraintList_elements (mscl, msc) | |
3373 | { | |
3374 | metaStateSpecifier msspec = metaStateConstraint_getSpecifier (msc); | |
3375 | metaStateInfo msinfo = metaStateSpecifier_getMetaStateInfo (msspec); | |
3376 | metaStateExpression msexpr = metaStateConstraint_getExpression (msc); | |
3377 | cstring key = metaStateInfo_getName (msinfo); | |
3378 | sRef mlsr = metaStateSpecifier_getSref (msspec); | |
3379 | sRef s; | |
3380 | sRef lastref = sRef_undefined; | |
3381 | stateValue sval = stateValue_undefined; | |
3382 | ||
3383 | DPRINTF (("Meta state constraint for %s: %s", uentry_unparse (le), | |
3384 | metaStateConstraint_unparse (msc))); | |
3385 | DPRINTF (("Matches left: %s", sRef_unparseDebug (mlsr))); | |
3386 | ||
3387 | if (sRef_isResult (sRef_getRootBase (mlsr))) | |
3388 | { | |
3389 | s = exprNode_getSref (ret); | |
3390 | } | |
3391 | else | |
3392 | { | |
3393 | s = sRef_fixBaseParam (mlsr, args); | |
3394 | } | |
3395 | ||
3396 | DPRINTF (("Setting state: %s", sRef_unparseFull (s))); | |
3397 | ||
3398 | while (metaStateExpression_isDefined (msexpr)) | |
3399 | { | |
3400 | metaStateSpecifier ms = metaStateExpression_getSpecifier (msexpr); | |
3401 | metaStateInfo msi = metaStateSpecifier_getMetaStateInfo (ms); | |
3402 | sRef msr, fs; | |
3403 | ||
3404 | DPRINTF (("Check expression: %s", metaStateExpression_unparse (msexpr))); | |
3405 | ||
3406 | if (metaStateExpression_isMerge (msexpr)) | |
3407 | { | |
3408 | msexpr = metaStateExpression_getRest (msexpr); | |
3409 | } | |
3410 | else | |
3411 | { | |
3412 | msexpr = metaStateExpression_undefined; | |
3413 | } | |
3414 | ||
3415 | if (metaStateInfo_isDefined (msi)) | |
3416 | { | |
3417 | /* Must match lhs state */ | |
3418 | llassert (metaStateInfo_equal (msinfo, msi)); | |
3419 | } | |
3420 | ||
3421 | if (metaStateSpecifier_isElipsis (ms)) | |
3422 | { | |
3423 | /* | |
3424 | ** For elipsis, we need to merge all the relevant elipsis parameters | |
3425 | ** | |
3426 | */ | |
3427 | ||
3428 | uentryList params = uentry_getParams (le); | |
3429 | int paramno = uentryList_size (params) - 1; | |
3430 | ||
3431 | if (!uentry_isElipsisMarker (uentryList_getN (params, paramno))) | |
3432 | { | |
3433 | voptgenerror | |
3434 | (FLG_TYPE, | |
3435 | message ("Ensures clauses uses ... for function without ... in parameter list: %q", | |
3436 | uentry_getName (le)), | |
3437 | uentry_whereLast (le)); | |
3438 | /*@innerbreak@*/ break; | |
3439 | } | |
3440 | ||
3441 | while (paramno < exprNodeList_size (args)) | |
3442 | { | |
3443 | exprNode arg = exprNodeList_getN (args, paramno); | |
3444 | fs = exprNode_getSref (arg); | |
3445 | DPRINTF (("Merge arg: %s", exprNode_unparse (arg))); | |
3446 | ||
3447 | /* cut and pasted... gack*/ | |
3448 | if (stateValue_isDefined (sval)) | |
3449 | { | |
3450 | /* Use combination table to merge old state value with new one: */ | |
3451 | stateValue tval = sRef_getMetaStateValue (fs, key); | |
3452 | ||
3453 | if (stateValue_isDefined (tval)) | |
3454 | { | |
3455 | stateCombinationTable sctable = metaStateInfo_getMergeTable (msinfo); | |
3456 | cstring msg = cstring_undefined; | |
3457 | int nval = stateCombinationTable_lookup (sctable, | |
3458 | stateValue_getValue (sval), | |
3459 | stateValue_getValue (tval), | |
3460 | &msg); | |
3461 | DPRINTF (("Combining: %s + %s -> %d", | |
3462 | stateValue_unparseValue (sval, msinfo), | |
3463 | stateValue_unparseValue (tval, msinfo), | |
3464 | nval)); | |
3465 | ||
3466 | if (nval == stateValue_error) | |
3467 | { | |
3468 | if (optgenerror | |
3469 | (FLG_STATEMERGE, | |
3470 | message | |
3471 | ("Attributes merged in ensures clause in states that " | |
3472 | "cannot be combined (%q is %q, %q is %q)%q", | |
3473 | sRef_unparse (lastref), | |
3474 | stateValue_unparseValue (sval, msinfo), | |
3475 | sRef_unparse (fs), | |
3476 | stateValue_unparseValue (tval, msinfo), | |
3477 | cstring_isDefined (msg) ? | |
3478 | message (": %s", msg) : cstring_undefined), | |
3479 | exprNode_loc (f))) | |
3480 | { | |
3481 | sRef_showMetaStateInfo (fs, key); | |
3482 | } | |
3483 | } | |
3484 | ||
3485 | stateValue_updateValueLoc (sval, nval, fileloc_undefined); | |
3486 | loc = exprNode_loc (arg); | |
3487 | } | |
3488 | else | |
3489 | { | |
3490 | DPRINTF (("No value for: %s:%s", sRef_unparse (fs), key)); | |
3491 | } | |
3492 | } | |
3493 | else | |
3494 | { | |
3495 | sval = sRef_getMetaStateValue (fs, key); | |
3496 | } | |
3497 | ||
3498 | lastref = fs; | |
3499 | ||
3500 | if (stateValue_isError (sval)) | |
3501 | { | |
3502 | /*@innerbreak@*/ break; /* Don't merge any more values if here was an error */ | |
3503 | } | |
3504 | ||
3505 | ||
3506 | paramno++; | |
3507 | } | |
3508 | } | |
3509 | else | |
3510 | { | |
3511 | msr = metaStateSpecifier_getSref (ms); | |
3512 | ||
3513 | ||
3514 | llassert (sRef_isParam (sRef_getRootBase (msr))); | |
3515 | fs = sRef_fixBaseParam (msr, args); | |
3516 | ||
3517 | if (stateValue_isDefined (sval)) | |
3518 | { | |
3519 | /* Use combination table to merge old state value with new one: */ | |
3520 | stateValue tval = sRef_getMetaStateValue (fs, key); | |
3521 | ||
3522 | if (stateValue_isDefined (tval)) | |
3523 | { | |
3524 | stateCombinationTable sctable = metaStateInfo_getMergeTable (msinfo); | |
3525 | cstring msg = cstring_undefined; | |
3526 | int nval = stateCombinationTable_lookup (sctable, | |
3527 | stateValue_getValue (sval), | |
3528 | stateValue_getValue (tval), | |
3529 | &msg); | |
3530 | DPRINTF (("Combining: %s + %s -> %d", | |
3531 | stateValue_unparseValue (sval, msinfo), | |
3532 | stateValue_unparseValue (tval, msinfo), | |
3533 | nval)); | |
3534 | ||
3535 | if (nval == stateValue_error) | |
3536 | { | |
3537 | if (optgenerror | |
3538 | (FLG_STATEMERGE, | |
3539 | message | |
3540 | ("Attributes merged in ensures clause in states that " | |
3541 | "cannot be combined (%q is %q, %q is %q)%q", | |
3542 | sRef_unparse (lastref), | |
3543 | stateValue_unparseValue (sval, msinfo), | |
3544 | sRef_unparse (fs), | |
3545 | stateValue_unparseValue (tval, msinfo), | |
3546 | cstring_isDefined (msg) | |
3547 | ? message (": %s", msg) : cstring_undefined), | |
3548 | exprNode_loc (f))) | |
3549 | { | |
3550 | sRef_showMetaStateInfo (fs, key); | |
3551 | } | |
3552 | } | |
3553 | ||
3554 | stateValue_updateValueLoc (sval, nval, fileloc_undefined); | |
3555 | } | |
3556 | else | |
3557 | { | |
3558 | DPRINTF (("No value for: %s:%s", sRef_unparse (fs), key)); | |
3559 | } | |
3560 | } | |
3561 | else | |
3562 | { | |
3563 | sval = sRef_getMetaStateValue (fs, key); | |
3564 | } | |
3565 | ||
3566 | lastref = fs; | |
3567 | ||
3568 | if (stateValue_isError (sval)) | |
3569 | { | |
3570 | /*@innerbreak@*/ break; /* Don't merge any more values if here was an error */ | |
3571 | } | |
3572 | } | |
3573 | } | |
3574 | ||
3575 | DPRINTF (("Setting: %s:%s <- %s", sRef_unparse (s), key, stateValue_unparse (sval))); | |
3576 | ||
3577 | if (stateValue_isDefined (sval)) | |
3578 | { | |
3579 | sRef_setMetaStateValueComplete (s, key, stateValue_getValue (sval), loc); | |
3580 | } | |
3581 | else | |
3582 | { | |
3583 | DPRINTF (("Undefined state: %s", cstring_toCharsSafe (sRef_unparse (s)))); | |
3584 | } | |
3585 | } end_metaStateConstraintList_elements ; | |
3586 | ||
3587 | metaStateConstraintList_free (mscl); | |
3588 | } | |
3589 | } | |
3590 | } | |
3591 | ||
3592 | static void | |
3593 | checkRequiresClause (uentry le, exprNode f, exprNodeList args) | |
3594 | { | |
3595 | DPRINTF (("Check requires clause: %s(%s) / %s / %s", | |
3596 | exprNode_unparse (f), exprNodeList_unparse (args), | |
3597 | uentry_unparseFull (le), | |
3598 | stateClauseList_unparse (uentry_getStateClauseList (le)))); | |
3599 | ||
3600 | if (uentry_isValid (le) && uentry_isFunction (le)) | |
3601 | { | |
3602 | stateClauseList sclauses = uentry_getStateClauseList (le); | |
3603 | ||
3604 | if (stateClauseList_isDefined (sclauses)) | |
3605 | { | |
3606 | DPRINTF (("Check requires: %s / %s / %s", | |
3607 | uentry_unparse (le), | |
3608 | exprNode_unparse (f), exprNodeList_unparse (args))); | |
3609 | ||
3610 | stateClauseList_elements (sclauses, cl) | |
3611 | { | |
3612 | DPRINTF (("Check clause: %s / %s", | |
3613 | stateClause_unparse (cl), | |
3614 | bool_unparse (stateClause_hasRequires (cl)))); | |
3615 | ||
3616 | if (stateClause_hasRequires (cl)) | |
3617 | { | |
3618 | sRefSet osrs = sRefSet_undefined; | |
3619 | sRefSet srs; | |
3620 | ||
3621 | if (stateClause_isGlobal (cl)) | |
3622 | { | |
3623 | srs = sRefSet_single (usymtab_lookupGlobalMarker ()); | |
3624 | osrs = srs; | |
3625 | } | |
3626 | else | |
3627 | { | |
3628 | srs = stateClause_getRefs (cl); | |
3629 | } | |
3630 | ||
3631 | DPRINTF (("Refs: %s", sRefSet_unparse (srs))); | |
3632 | ||
3633 | if (stateClause_setsMetaState (cl)) | |
3634 | { | |
3635 | qual q = stateClause_getMetaQual (cl); | |
3636 | annotationInfo ainfo = qual_getAnnotationInfo (q); | |
3637 | metaStateInfo minfo = annotationInfo_getState (ainfo); | |
3638 | cstring key = metaStateInfo_getName (minfo); | |
3639 | int mvalue = annotationInfo_getValue (ainfo); | |
3640 | ||
3641 | DPRINTF (("Requires meta state! %s = %d", key, mvalue)); | |
3642 | ||
3643 | sRefSet_elements (srs, sel) | |
3644 | { | |
3645 | sRef s = sRef_fixBaseParam (sel, args); | |
3646 | ||
3647 | if (sRef_isResult (sRef_getRootBase (sel))) | |
3648 | { | |
3649 | BADBRANCH; | |
3650 | } | |
3651 | else | |
3652 | { | |
3653 | DPRINTF (("Checking state clause on: %s / %s / %s = %d", | |
3654 | sRef_unparseFull (sel), sRef_unparseFull (s), | |
3655 | key, mvalue)); | |
3656 | ||
3657 | if (!sRef_checkMetaStateValue (s, key, mvalue)) | |
3658 | { | |
3659 | DPRINTF (("HERE: %s", sRef_unparse (s))); | |
3660 | if (optgenerror | |
3661 | (FLG_STATETRANSFER, | |
3662 | message | |
3663 | ("Requires clause of called function %q not satisfied%q (state is %q): %q", | |
3664 | uentry_getName (le), | |
3665 | sRef_isGlobalMarker (s) | |
3666 | ? message ("") | |
3667 | : message (" by %q", sRef_unparse (s)), | |
3668 | stateValue_unparseValue (sRef_getMetaStateValue (s, key), | |
3669 | minfo), | |
3670 | stateClause_unparse (cl)), | |
3671 | exprNode_loc (f))) | |
3672 | { | |
3673 | sRef_showAliasInfo (s); | |
3674 | } | |
3675 | else | |
3676 | { | |
3677 | DPRINTF (("Error supressed!")); | |
3678 | DPRINTF (("Loc: %s", fileloc_unparse (exprNode_loc (f)))); | |
3679 | DPRINTF (("Context supress: %s", | |
3680 | bool_unparse (context_suppressFlagMsg (FLG_STATETRANSFER, exprNode_loc (f))))); | |
3681 | } | |
3682 | } | |
3683 | } | |
3684 | } end_sRefSet_elements; | |
3685 | } | |
3686 | else | |
3687 | { | |
3688 | sRefModVal modf = stateClause_getRequiresBodyFunction (cl); | |
3689 | int eparam = stateClause_getStateParameter (cl); | |
3690 | ||
3691 | DPRINTF (("Reflect after clause: %s / %s", | |
3692 | stateClause_unparse (cl), | |
3693 | sRefSet_unparse (srs))); | |
3694 | ||
3695 | llassert (modf != NULL); | |
3696 | ||
3697 | sRefSet_elements (srs, sel) | |
3698 | { | |
3699 | sRef s; | |
3700 | ||
3701 | DPRINTF (("elements: %s", sRef_unparse (sel))); | |
3702 | DPRINTF (("elements: %s", sRef_unparseFull (sel))); | |
3703 | ||
3704 | s = sRef_fixBaseParam (sel, args); | |
3705 | ||
3706 | DPRINTF (("elements: %s", sRef_unparse (s))); | |
3707 | DPRINTF (("elements: %s", sRef_unparseFull (s))); | |
3708 | ||
3709 | if (sRef_isResult (sRef_getRootBase (sel))) | |
3710 | { | |
3711 | ; /* what do we do about results? */ | |
3712 | } | |
3713 | else | |
3714 | { | |
3715 | DPRINTF (("Reflecting state clause on: %s / %s", | |
3716 | sRef_unparse (sel), sRef_unparse (s))); | |
3717 | ||
3718 | modf (s, eparam, exprNode_loc (f)); | |
3719 | } | |
3720 | } end_sRefSet_elements; | |
3721 | } | |
3722 | ||
3723 | sRefSet_free (osrs); | |
3724 | } | |
3725 | } end_stateClauseList_elements ; | |
3726 | } | |
3727 | } | |
3728 | } | |
3729 | ||
3730 | static /*@only@*/ exprNode | |
3731 | functionCallSafe (/*@only@*/ /*@notnull@*/ exprNode f, | |
3732 | ctype t, /*@keep@*/ exprNodeList args) | |
3733 | { | |
3734 | /* requires f is a non-error exprNode, with type function */ | |
3735 | cstring fname = exprNode_unparse (f); | |
3736 | uentry le = exprNode_getUentry (f); | |
3737 | exprNode ret = exprNode_createPartialCopy (f); | |
3738 | int special; | |
3739 | ||
3740 | setCodePoint (); | |
3741 | ||
3742 | DPRINTF (("Call: %s %s",exprNode_unparse (f), exprNodeList_unparse (args))); | |
3743 | ||
3744 | ret->typ = ctype_getReturnType (t); | |
3745 | ret->kind = XPR_CALL; | |
3746 | ||
3747 | ret->edata = exprData_makeCall (f, args); | |
3748 | ||
3749 | /* | |
3750 | ** Order of these steps is very important! | |
3751 | ** | |
3752 | ** Must check for argument dependencies before messing up uses and sets. | |
3753 | */ | |
3754 | ||
3755 | if (context_getFlag (FLG_EVALORDER)) | |
3756 | { | |
3757 | exprNodeList_elements (args, current) | |
3758 | { | |
3759 | if (exprNode_isDefined (current)) | |
3760 | { | |
3761 | exprNode_addUse (current, current->sref); | |
3762 | } | |
3763 | } end_exprNodeList_elements; | |
3764 | ||
3765 | if (context_maybeSet (FLG_EVALORDER) || context_maybeSet (FLG_EVALORDERUNCON)) | |
3766 | { | |
3767 | checkSequencing (f, args); | |
3768 | } | |
3769 | ||
3770 | exprNodeList_elements (args, current) | |
3771 | { | |
3772 | if (exprNode_isDefined (current) && sRef_isMeaningful (current->sref)) | |
3773 | { | |
3774 | exprNode_addUse (ret, sRef_makeDerived (current->sref)); | |
3775 | } | |
3776 | } end_exprNodeList_elements ; | |
3777 | } | |
3778 | ||
3779 | special = checkArgs (le, f, t, args, ret); | |
3780 | checkGlobMods (f, le, args, ret, special); | |
3781 | checkRequiresClause (le, f, args); | |
3782 | setCodePoint (); | |
3783 | ||
3784 | if (uentry_isValid (le) | |
3785 | && (uentry_isFunction (le) | |
3786 | || (uentry_isVariable (le) | |
3787 | && ctype_isFunction (uentry_getType (le))))) | |
3788 | { | |
3789 | exitkind exk = uentry_getExitCode (le); | |
3790 | ||
3791 | /* f->typ is already set to the return type */ | |
3792 | ||
3793 | DPRINTF (("Function: %s", uentry_unparseFull (le))); | |
3794 | ret->sref = uentry_returnedRef (le, args, exprNode_loc (f)); | |
3795 | DPRINTF (("Returned: %s / %s", | |
3796 | uentry_unparseFull (le), | |
3797 | sRef_unparseFull (ret->sref))); | |
3798 | ||
3799 | if (uentry_isFunction (le) && exprNodeList_size (args) >= 1) | |
3800 | { | |
3801 | qual nullPred = uentry_nullPred (le); | |
3802 | ||
3803 | if (qual_isTrueNull (nullPred)) | |
3804 | { | |
3805 | exprNode arg = exprNodeList_head (args); | |
3806 | ||
3807 | if (exprNode_isDefined (arg)) | |
3808 | { | |
3809 | ret->guards = guardSet_addFalseGuard (ret->guards, arg->sref); | |
3810 | } | |
3811 | } | |
3812 | else if (qual_isFalseNull (nullPred)) | |
3813 | { | |
3814 | exprNode arg = exprNodeList_head (args); | |
3815 | ||
3816 | if (exprNode_isDefined (arg)) | |
3817 | { | |
3818 | ret->guards = guardSet_addTrueGuard (ret->guards, arg->sref); | |
3819 | } | |
3820 | } | |
3821 | else | |
3822 | { | |
3823 | llassert (qual_isUnknown (nullPred)); | |
3824 | } | |
3825 | } | |
3826 | ||
3827 | if (exitkind_isConditionalExit (exk)) | |
3828 | { | |
3829 | /* | |
3830 | ** True exit is: | |
3831 | ** if (arg0) then { exit! } else { ; } | |
3832 | ** False exit is: | |
3833 | ** if (arg0) then { ; } else { exit! } | |
3834 | */ | |
3835 | ||
3836 | exprNode firstArg; | |
3837 | ||
3838 | llassert (!exprNodeList_isEmpty (args)); | |
3839 | firstArg = exprNodeList_head (args); | |
3840 | ||
3841 | if (exprNode_isDefined (firstArg) | |
3842 | && !guardSet_isEmpty (firstArg->guards)) | |
3843 | { | |
3844 | usymtab_trueBranch (guardSet_undefined); | |
3845 | usymtab_altBranch (guardSet_undefined); | |
3846 | ||
3847 | if (exitkind_isTrueExit (exk)) | |
3848 | { | |
3849 | usymtab_popBranches (firstArg, | |
3850 | exprNode_makeMustExit (), | |
3851 | exprNode_undefined, | |
3852 | TRUE, TRUEEXITCLAUSE); | |
3853 | } | |
3854 | else | |
3855 | { | |
3856 | usymtab_popBranches (firstArg, | |
3857 | exprNode_undefined, | |
3858 | exprNode_makeMustExit (), | |
3859 | TRUE, FALSEEXITCLAUSE); | |
3860 | } | |
3861 | } | |
3862 | ||
3863 | ret->exitCode = XK_MAYEXIT; | |
3864 | } | |
3865 | else if (exitkind_mustExit (exk)) | |
3866 | { | |
3867 | ret->exitCode = XK_MUSTEXIT; | |
3868 | } | |
3869 | else if (exitkind_couldExit (exk)) | |
3870 | { | |
3871 | ret->exitCode = XK_MAYEXIT; | |
3872 | } | |
3873 | else | |
3874 | { | |
3875 | ; | |
3876 | } | |
3877 | ||
3878 | if (cstring_equalLit (fname, "exit")) | |
3879 | { | |
3880 | if (exprNodeList_size (args) == 1) | |
3881 | { | |
3882 | exprNode arg = exprNodeList_head (args); | |
3883 | ||
3884 | if (exprNode_isDefined (arg) && exprNode_knownIntValue (arg)) | |
3885 | { | |
3886 | long int val = multiVal_forceInt (exprNode_getValue (arg)); | |
3887 | ||
3888 | if (val != 0) | |
3889 | { | |
3890 | voptgenerror | |
3891 | (FLG_EXITARG, | |
3892 | message | |
3893 | ("Argument to exit has implementation defined behavior: %s", | |
3894 | exprNode_unparse (arg)), | |
3895 | exprNode_loc (arg)); | |
3896 | } | |
3897 | } | |
3898 | } | |
3899 | } | |
3900 | } | |
3901 | else | |
3902 | { | |
3903 | ret->sref = sRef_undefined; | |
3904 | exprNode_checkSetAny (ret, uentry_rawName (le)); | |
3905 | } | |
3906 | ||
3907 | DPRINTF (("Before reflect: %s", sRef_unparseFull (ret->sref))); | |
3908 | DPRINTF (("Reflect: %s", uentry_unparseFull (le))); | |
3909 | reflectEnsuresClause (ret, le, f, args); | |
3910 | setCodePoint (); | |
3911 | ||
3912 | DPRINTF (("Here: %s", sRef_unparseFull (ret->sref))); | |
3913 | return (ret); | |
3914 | } | |
3915 | ||
3916 | /* | |
3917 | ** this is yucky! should keep the uentry as part of exprNode! | |
3918 | */ | |
3919 | ||
3920 | uentry exprNode_getUentry (exprNode e) | |
3921 | { | |
3922 | if (exprNode_isError (e)) | |
3923 | { | |
3924 | return uentry_undefined; | |
3925 | } | |
3926 | else | |
3927 | { | |
3928 | cstring s = exprNode_rootVarName (e); | |
3929 | uentry ue = usymtab_lookupSafe (s); | |
3930 | ||
3931 | return ue; | |
3932 | } | |
3933 | } | |
3934 | ||
3935 | /* | |
3936 | ** Returns true iff e1 and e2 are both exactly the same storage | |
3937 | ** (conservative). | |
3938 | */ | |
3939 | ||
3940 | static bool exprNode_sameStorage (exprNode e1, exprNode e2) | |
3941 | { | |
3942 | sRef s1 = exprNode_getSref (e1); | |
3943 | sRef s2 = exprNode_getSref (e2); | |
3944 | ||
3945 | return (sRef_realSame (s1, s2)); | |
3946 | } | |
3947 | ||
3948 | exprNode | |
3949 | exprNode_makeInitBlock (lltok brace, /*@only@*/ exprNodeList inits) | |
3950 | { | |
3951 | exprNode ret = exprNode_createPlain (ctype_unknown); | |
3952 | ||
3953 | ret->kind = XPR_INITBLOCK; | |
3954 | ret->edata = exprData_makeCall (exprNode_undefined, inits); | |
3955 | ret->loc = fileloc_update (ret->loc, lltok_getLoc (brace)); | |
3956 | ||
3957 | return (ret); | |
3958 | } | |
3959 | ||
3960 | exprNode | |
3961 | exprNode_functionCall (/*@only@*/ exprNode f, /*@only@*/ exprNodeList args) | |
3962 | { | |
3963 | ctype t; | |
3964 | ||
3965 | # ifdef DEBUGSPLINT | |
3966 | usymtab_checkAllValid (); | |
3967 | # endif | |
3968 | ||
3969 | if (exprNode_isUndefined (f)) | |
3970 | { | |
3971 | exprNode_free (f); | |
3972 | exprNodeList_free (args); | |
3973 | return exprNode_undefined; | |
3974 | } | |
3975 | ||
3976 | t = exprNode_getType (f); | |
3977 | ||
3978 | if (sRef_isLocalVar (f->sref)) | |
3979 | { | |
3980 | exprNode_checkUse (f, f->sref, f->loc); | |
3981 | ||
3982 | if (sRef_possiblyNull (f->sref)) | |
3983 | { | |
3984 | if (!usymtab_isGuarded (f->sref)) | |
3985 | { | |
3986 | if (optgenerror (FLG_NULLDEREF, | |
3987 | message ("Function call using %s pointer %q", | |
3988 | sRef_nullMessage (f->sref), | |
3989 | sRef_unparse (f->sref)), | |
3990 | f->loc)) | |
3991 | { | |
3992 | sRef_showNullInfo (f->sref); | |
3993 | sRef_setNullError (f->sref); | |
3994 | } | |
3995 | } | |
3996 | } | |
3997 | } | |
3998 | ||
3999 | setCodePoint (); | |
4000 | ||
4001 | if (ctype_isRealFunction (t)) | |
4002 | { | |
4003 | exprNode ret = functionCallSafe (f, t, args); | |
4004 | setCodePoint (); | |
4005 | return ret; | |
4006 | } | |
4007 | else if (ctype_isUnknown (t)) | |
4008 | { | |
4009 | exprNode ret = exprNode_createPartialCopy (f); | |
4010 | cstring tstring; | |
4011 | ||
4012 | setCodePoint (); | |
4013 | ||
4014 | ret->typ = t; | |
4015 | exprNodeList_elements (args, current) | |
4016 | { | |
4017 | if (exprNode_isDefined (current)) | |
4018 | { | |
4019 | exprNode_checkUse (ret, current->sref, ret->loc); | |
4020 | ||
4021 | /* | |
4022 | ** also, anything derivable from current->sref may be used | |
4023 | */ | |
4024 | ||
4025 | exprNode_addUse (ret, sRef_makeDerived (current->sref)); | |
4026 | exprNode_mergeUSs (ret, current); | |
4027 | } | |
4028 | } end_exprNodeList_elements; | |
4029 | ||
4030 | ret->edata = exprData_makeCall (f, args); | |
4031 | ret->kind = XPR_CALL; | |
4032 | ||
4033 | tstring = cstring_copy (exprNode_unparse (f)); | |
4034 | ||
4035 | cstring_markOwned (tstring); | |
4036 | exprNode_checkSetAny (ret, tstring); | |
4037 | ||
4038 | return (ret); | |
4039 | } | |
4040 | else | |
4041 | { | |
4042 | voptgenerror (FLG_TYPE, | |
4043 | message ("Call to non-function (type %t): %s", t, | |
4044 | exprNode_unparse (f)), | |
4045 | f->loc); | |
4046 | exprNode_free (f); | |
4047 | exprNodeList_free (args); | |
4048 | ||
4049 | return (exprNode_makeError ()); | |
4050 | } | |
4051 | } | |
4052 | ||
4053 | static exprNode | |
4054 | exprNode_fieldAccessAux (/*@only@*/ exprNode s, /*@observer@*/ fileloc loc, | |
4055 | /*@only@*/ cstring f) | |
4056 | { | |
4057 | exprNode ret = exprNode_createPartialCopy (s); | |
4058 | ||
4059 | ret->kind = XPR_FACCESS; | |
4060 | ||
4061 | if (exprNode_isError (s)) | |
4062 | { | |
4063 | ret->edata = exprData_makeField (s, f); | |
4064 | return ret; | |
4065 | } | |
4066 | else | |
4067 | { | |
4068 | ctype t = exprNode_getType (s); | |
4069 | ctype tr = ctype_realType (t); | |
4070 | ||
4071 | checkMacroParen (s); | |
4072 | ||
4073 | ret->edata = exprData_makeField (s, f); | |
4074 | ||
4075 | if (ctype_isStructorUnion (tr)) | |
4076 | { | |
4077 | uentry tf = uentryList_lookupField (ctype_getFields (tr), f); | |
4078 | ||
4079 | if (uentry_isUndefined (tf)) | |
4080 | { | |
4081 | voptgenerror (FLG_TYPE, | |
4082 | message ("Access non-existent field %s of %t: %s", f, t, | |
4083 | exprNode_unparse (ret)), | |
4084 | loc); | |
4085 | /*! cstring_free (f); */ /* evans 2001-03-25 self-detect */ | |
4086 | return (ret); | |
4087 | } | |
4088 | else | |
4089 | { | |
4090 | uentry_setUsed (tf, exprNode_loc (ret)); | |
4091 | ||
4092 | ret->typ = uentry_getType (tf); | |
4093 | checkSafeUse (ret, s->sref); | |
4094 | ||
4095 | ret->sref = sRef_makeField (s->sref, uentry_rawName (tf)); | |
4096 | /*!? exprNode_free (s); */ /* evans 2001-03-25 self-detect */ | |
4097 | return (ret); | |
4098 | } | |
4099 | } | |
4100 | else /* isStructorUnion */ | |
4101 | { | |
4102 | if (ctype_isRealAbstract (tr)) | |
4103 | { | |
4104 | voptgenerror | |
4105 | (FLG_ABSTRACT, | |
4106 | message ("Access field of abstract type (%t): %s.%s", | |
4107 | t, exprNode_unparse (s), f), | |
4108 | loc); | |
4109 | ret->typ = ctype_unknown; | |
4110 | } | |
4111 | else | |
4112 | { | |
4113 | if (ctype_isKnown (tr)) | |
4114 | { | |
4115 | voptgenerror | |
4116 | (FLG_TYPE, | |
4117 | message | |
4118 | ("Access field of non-struct or union (%t): %s.%s", | |
4119 | t, exprNode_unparse (s), f), | |
4120 | loc); | |
4121 | ||
4122 | ret->typ = ctype_unknown; | |
4123 | } | |
4124 | else | |
4125 | { | |
4126 | cstring sn = cstring_copy (f); | |
4127 | ||
4128 | checkSafeUse (ret, s->sref); | |
4129 | cstring_markOwned (sn); | |
4130 | ret->sref = sRef_makeField (s->sref, sn); | |
4131 | return (ret); | |
4132 | } | |
4133 | } | |
4134 | ||
4135 | return (ret); | |
4136 | } | |
4137 | } | |
4138 | BADEXIT; | |
4139 | } | |
4140 | ||
4141 | exprNode | |
4142 | exprNode_fieldAccess (/*@only@*/ exprNode s, /*@only@*/ lltok dot, | |
4143 | /*@only@*/ cstring f) | |
4144 | { | |
4145 | exprNode res = exprNode_fieldAccessAux (s, lltok_getLoc (dot), f); | |
4146 | lltok_free (dot); | |
4147 | return res; | |
4148 | } | |
4149 | ||
4150 | exprNode | |
4151 | exprNode_addParens (/*@only@*/ lltok lpar, /*@only@*/ exprNode e) | |
4152 | { | |
4153 | exprNode ret = exprNode_createPartialCopy (e); | |
4154 | ||
4155 | ret->loc = fileloc_update (ret->loc, lltok_getLoc (lpar)); | |
4156 | ret->kind = XPR_PARENS; | |
4157 | ret->edata = exprData_makeUop (e, lpar); | |
4158 | ||
4159 | if (!exprNode_isError (e)) | |
4160 | { | |
4161 | ret->exitCode = e->exitCode; | |
4162 | ret->canBreak = e->canBreak; | |
4163 | ret->mustBreak = e->mustBreak; | |
4164 | ret->isJumpPoint = e->isJumpPoint; | |
4165 | ret->sref = e->sref; | |
4166 | } | |
4167 | ||
4168 | return ret; | |
4169 | } | |
4170 | ||
4171 | static exprNode | |
4172 | exprNode_arrowAccessAux (/*@only@*/ exprNode s, /*@observer@*/ fileloc loc, | |
4173 | /*@only@*/ cstring f) | |
4174 | { | |
4175 | exprNode ret = exprNode_createPartialCopy (s); | |
4176 | ||
4177 | ret->edata = exprData_makeField (s, f); | |
4178 | ret->kind = XPR_ARROW; | |
4179 | ||
4180 | if (exprNode_isError (s)) | |
4181 | { | |
4182 | return (ret); | |
4183 | } | |
4184 | else | |
4185 | { | |
4186 | ctype t = exprNode_getType (s); | |
4187 | ctype tr = ctype_realType (t); | |
4188 | ||
4189 | checkMacroParen (s); | |
4190 | ||
4191 | (void) ctype_fixArrayPtr (tr); /* REWRITE THIS */ | |
4192 | ||
4193 | if (ctype_isRealPointer (tr)) | |
4194 | { | |
4195 | ctype b = ctype_realType (ctype_baseArrayPtr (tr)); | |
4196 | ||
4197 | if (ctype_isStructorUnion (b)) | |
4198 | { | |
4199 | uentry fentry = uentryList_lookupField (ctype_getFields (b), f); | |
4200 | ||
4201 | if (sRef_isKnown (s->sref) && sRef_possiblyNull (s->sref)) | |
4202 | { | |
4203 | if (!usymtab_isGuarded (s->sref) && !context_inProtectVars ()) | |
4204 | { | |
4205 | if (optgenerror | |
4206 | (FLG_NULLDEREF, | |
4207 | message ("Arrow access from %s pointer%q: %s", | |
4208 | sRef_nullMessage (s->sref), | |
4209 | sRef_unparsePreOpt (s->sref), | |
4210 | exprNode_unparse (ret)), | |
4211 | loc)) | |
4212 | { | |
4213 | sRef_showNullInfo (s->sref); | |
4214 | sRef_setNullError (s->sref); | |
4215 | } | |
4216 | } | |
4217 | } | |
4218 | ||
4219 | if (uentry_isUndefined (fentry)) | |
4220 | { | |
4221 | voptgenerror | |
4222 | (FLG_TYPE, | |
4223 | message ("Access non-existent field %s of %t: %s", | |
4224 | f, t, exprNode_unparse (ret)), | |
4225 | loc); | |
4226 | ret->typ = ctype_unknown; | |
4227 | return (ret); | |
4228 | } | |
4229 | else | |
4230 | { | |
4231 | /* | |
4232 | ** was safeUse: shouldn't be safe! | |
4233 | ** | |
4234 | ** to do rec->field | |
4235 | ** rec must be defined, | |
4236 | ** *rec must be allocated | |
4237 | ** rec->field need only be defined it if is an rvalue | |
4238 | */ | |
4239 | ||
4240 | uentry_setUsed (fentry, exprNode_loc (ret)); | |
4241 | ret->typ = uentry_getType (fentry); | |
4242 | ||
4243 | exprNode_checkUse (ret, s->sref, s->loc); | |
4244 | ||
4245 | /* exprNode_checkUse (ret, sRef_makePointer (s->sref), s->loc); */ | |
4246 | ret->sref = sRef_makeArrow (s->sref, uentry_rawName (fentry)); | |
4247 | return (ret); | |
4248 | } | |
4249 | } | |
4250 | else /* Pointer to something that is not a struct or union*/ | |
4251 | { | |
4252 | if (ctype_isRealAbstract (tr)) | |
4253 | { | |
4254 | ctype xrt = ctype_forceRealType (tr); | |
4255 | ||
4256 | voptgenerror | |
4257 | (FLG_ABSTRACT, | |
4258 | message ("Arrow access field of abstract type (%t): %s->%s", | |
4259 | t, exprNode_unparse (s), f), | |
4260 | loc); | |
4261 | ||
4262 | /* | |
4263 | ** Set the state correctly, as if the abstraction is broken. | |
4264 | */ | |
4265 | ||
4266 | if (ctype_isRealPointer (xrt) && | |
4267 | (b = ctype_realType (ctype_baseArrayPtr (xrt)), | |
4268 | ctype_isStructorUnion (b))) | |
4269 | { | |
4270 | uentry fentry = uentryList_lookupField (ctype_getFields (b), f); | |
4271 | ret->typ = uentry_getType (fentry); | |
4272 | ret->sref = sRef_makeArrow (s->sref, uentry_rawName (fentry)); | |
4273 | } | |
4274 | else | |
4275 | { | |
4276 | ret->typ = ctype_unknown; | |
4277 | ret->sref = sRef_undefined; | |
4278 | } | |
4279 | } | |
4280 | else /* not a struct, union or abstract */ | |
4281 | { | |
4282 | if (ctype_isUnknown (tr)) { | |
4283 | cstring sn = cstring_copy (f); | |
4284 | ||
4285 | DPRINTF (("Here: %s", exprNode_unparse (s))); | |
4286 | ||
4287 | exprNode_checkUse (ret, s->sref, s->loc); | |
4288 | exprNode_checkUse (ret, sRef_makePointer (s->sref), s->loc); | |
4289 | ||
4290 | cstring_markOwned (sn); | |
4291 | ret->sref = sRef_makeArrow (s->sref, sn); | |
4292 | ||
4293 | ret->kind = XPR_ARROW; | |
4294 | return (ret); | |
4295 | } else { | |
4296 | voptgenerror | |
4297 | (FLG_TYPE, | |
4298 | message ("Arrow access field of non-struct or union " | |
4299 | "pointer (%t): %s->%s", | |
4300 | t, exprNode_unparse (s), f), | |
4301 | loc); | |
4302 | ||
4303 | ret->typ = ctype_unknown; | |
4304 | ret->sref = sRef_undefined; | |
4305 | } | |
4306 | } | |
4307 | } | |
4308 | } | |
4309 | else /* its not a pointer */ | |
4310 | { | |
4311 | if (!ctype_isUnknown (tr)) | |
4312 | { | |
4313 | voptgenerror | |
4314 | (FLG_TYPE, | |
4315 | message ("Arrow access of non-pointer (%t): %s->%s", | |
4316 | t, exprNode_unparse (s), f), | |
4317 | loc); | |
4318 | ||
4319 | ret->typ = ctype_unknown; | |
4320 | ret->sref = sRef_undefined; | |
4321 | } | |
4322 | else | |
4323 | { | |
4324 | cstring sn = cstring_copy (f); | |
4325 | ||
4326 | DPRINTF (("Here: %s", exprNode_unparse (s))); | |
4327 | ||
4328 | exprNode_checkUse (ret, s->sref, s->loc); | |
4329 | exprNode_checkUse (ret, sRef_makePointer (s->sref), s->loc); | |
4330 | ||
4331 | cstring_markOwned (sn); | |
4332 | ret->sref = sRef_makeArrow (s->sref, sn); | |
4333 | ||
4334 | ret->kind = XPR_ARROW; | |
4335 | return (ret); | |
4336 | } | |
4337 | } | |
4338 | ||
4339 | return (ret); | |
4340 | } | |
4341 | BADEXIT; | |
4342 | } | |
4343 | ||
4344 | exprNode | |
4345 | exprNode_arrowAccess (/*@only@*/ exprNode s, | |
4346 | /*@only@*/ lltok arrow, | |
4347 | /*@only@*/ cstring f) | |
4348 | { | |
4349 | exprNode res = exprNode_arrowAccessAux (s, lltok_getLoc (arrow), f); | |
4350 | lltok_free (arrow); | |
4351 | return res; | |
4352 | } | |
4353 | ||
4354 | /* | |
4355 | ** only postOp's in C: i++ and i-- | |
4356 | */ | |
4357 | ||
4358 | exprNode | |
4359 | exprNode_postOp (/*@only@*/ exprNode e, /*@only@*/ lltok op) | |
4360 | { | |
4361 | /* check modification also */ | |
4362 | /* cstring opname = lltok_unparse (op);*/ | |
4363 | ctype t; | |
4364 | exprNode ret = exprNode_createPartialCopy (e); | |
4365 | ||
4366 | ret->loc = fileloc_update (ret->loc, lltok_getLoc (op)); | |
4367 | ret->kind = XPR_POSTOP; | |
4368 | ret->edata = exprData_makeUop (e, op); | |
4369 | ||
4370 | if (!exprNode_isDefined (e)) | |
4371 | { | |
4372 | return ret; | |
4373 | } | |
4374 | ||
4375 | checkMacroParen (e); | |
4376 | ||
4377 | exprNode_checkUse (ret, e->sref, e->loc); | |
4378 | exprNode_checkSet (ret, e->sref); | |
4379 | ||
4380 | t = exprNode_getType (e); | |
4381 | ||
4382 | if (sRef_isUnsafe (e->sref)) | |
4383 | { | |
4384 | voptgenerror (FLG_MACROPARAMS, | |
4385 | message ("Operand of %s is macro parameter (non-functional): %s%s", | |
4386 | lltok_unparse (op), exprNode_unparse (e), lltok_unparse (op)), | |
4387 | e->loc); | |
4388 | sRef_makeSafe (e->sref); | |
4389 | sRef_makeSafe (ret->sref); | |
4390 | } | |
4391 | ||
4392 | if (ctype_isForceRealNumeric (&t) || ctype_isRealAP (t)) | |
4393 | { | |
4394 | ret->typ = e->typ; | |
4395 | } | |
4396 | else | |
4397 | { | |
4398 | if (ctype_isRealAbstract (t)) | |
4399 | { | |
4400 | if (ctype_isRealNumAbstract (t)) { | |
4401 | ; /* Allow operations on numabstract types */ | |
4402 | } else { | |
4403 | voptgenerror | |
4404 | (FLG_ABSTRACT, | |
4405 | message ("Operand of %s is abstract type (%t): %s", | |
4406 | lltok_unparse (op), t, exprNode_unparse (e)), | |
4407 | e->loc); | |
4408 | } | |
4409 | } | |
4410 | else | |
4411 | { | |
4412 | voptgenerror | |
4413 | (FLG_TYPE, | |
4414 | message ("Operand of %s is non-numeric (%t): %s", | |
4415 | lltok_unparse (op), t, exprNode_unparse (e)), | |
4416 | e->loc); | |
4417 | } | |
4418 | ret->typ = ctype_unknown; | |
4419 | } | |
4420 | ||
4421 | /* if (ctype_isZero (t)) e->typ = ctype_int; */ | |
4422 | ||
4423 | exprNode_checkModify (e, ret); | |
4424 | ||
4425 | /* added 7/11/2000 D.L */ | |
4426 | ||
4427 | /* updateEnvironmentForPostOp (e); */ | |
4428 | ||
4429 | /* start modifications */ | |
4430 | /* added by Seejo on 4/16/2000 */ | |
4431 | ||
4432 | /* Arithmetic operations on pointers wil modify the size/len/null terminated | |
4433 | status */ | |
4434 | if ((sRef_isPossiblyNullTerminated (e->sref)) || (sRef_isNullTerminated(e->sref))) { | |
4435 | ||
4436 | ret->sref = sRef_copy (e->sref); | |
4437 | ||
4438 | /* Operator : ++ */ | |
4439 | if (lltok_getTok (op) == INC_OP) { | |
4440 | if (sRef_getSize(e->sref) > 0) { | |
4441 | ||
4442 | sRef_setSize (ret->sref, sRef_getSize(e->sref) - 1); | |
4443 | ||
4444 | if (sRef_getLen(e->sref) == 1) { /* i.e. the first character is \0 */ | |
4445 | /* Assumption: there is only 1 \0 in the buffer */ | |
4446 | /* This will not be correct if there are 2 \0's in the buffer */ | |
4447 | sRef_setNotNullTerminatedState(ret->sref); | |
4448 | sRef_resetLen(ret->sref); | |
4449 | } else { | |
4450 | sRef_setNullTerminatedState(ret->sref); | |
4451 | sRef_setLen (ret->sref, sRef_getLen(e->sref) - 1); | |
4452 | } | |
4453 | if (sRef_isNullTerminated (ret->sref)) | |
4454 | printf ("ret->sref is Null Terminated\n"); | |
4455 | else if (sRef_isPossiblyNullTerminated (ret->sref)) | |
4456 | printf ("ret->sref is Possibly Null Terminated\n"); | |
4457 | else if (sRef_isNotNullTerminated (ret->sref)) | |
4458 | printf ("ret->sref is Not Null Terminated\n"); | |
4459 | else | |
4460 | {} | |
4461 | } | |
4462 | } | |
4463 | ||
4464 | /* Operator : -- */ | |
4465 | if (lltok_getTok (op) == DEC_OP) { | |
4466 | if (sRef_getSize(e->sref) >= 0) { | |
4467 | sRef_setSize (ret->sref, sRef_getSize(e->sref) + 1); | |
4468 | sRef_setLen (ret->sref, sRef_getLen(e->sref) + 1); | |
4469 | } | |
4470 | } | |
4471 | } | |
4472 | /* end modifications */ | |
4473 | ||
4474 | return ret; | |
4475 | } | |
4476 | ||
4477 | exprNode | |
4478 | exprNode_preOp (/*@only@*/ exprNode e, /*@only@*/ lltok op) | |
4479 | { | |
4480 | bool checkMod = FALSE; | |
4481 | ctype te, tr; | |
4482 | int opid = lltok_getTok (op); | |
4483 | exprNode ret = exprNode_createSemiCopy (e); | |
4484 | ||
4485 | exprNode_copySets (ret, e); | |
4486 | ||
4487 | multiVal_free (ret->val); | |
4488 | ret->val = multiVal_undefined; | |
4489 | ret->loc = fileloc_update (ret->loc, lltok_getLoc (op)); | |
4490 | ret->kind = XPR_PREOP; | |
4491 | ret->edata = exprData_makeUop (e, op); | |
4492 | ||
4493 | if (exprNode_isError (e)) | |
4494 | { | |
4495 | return ret; | |
4496 | } | |
4497 | ||
4498 | checkMacroParen (e); | |
4499 | ||
4500 | te = exprNode_getType (e); | |
4501 | tr = ctype_realType (te); | |
4502 | ||
4503 | if (opid != TAMPERSAND) | |
4504 | { | |
4505 | exprNode_checkUse (ret, e->sref, e->loc); | |
4506 | ||
4507 | if (ctype_isRealAbstract (tr) | |
4508 | && (!(ctype_isRealBool (te) && (opid == TEXCL)))) | |
4509 | { | |
4510 | if (ctype_isRealNumAbstract (tr)) | |
4511 | { | |
4512 | ; /* no warning for numabstract types */ | |
4513 | } | |
4514 | else | |
4515 | { | |
4516 | if (optgenerror (FLG_ABSTRACT, | |
4517 | message ("Operand of %s is abstract type (%t): %s", | |
4518 | lltok_unparse (op), tr, | |
4519 | exprNode_unparse (ret)), | |
4520 | e->loc)) | |
4521 | { | |
4522 | tr = te = ctype_unknown; | |
4523 | ret->typ = ctype_unknown; | |
4524 | sRef_setNullError (e->sref); | |
4525 | } | |
4526 | } | |
4527 | } | |
4528 | } | |
4529 | ||
4530 | switch (opid) | |
4531 | { | |
4532 | case INC_OP: | |
4533 | case DEC_OP: /* should also check modification! */ | |
4534 | if (sRef_isMacroParamRef (e->sref)) | |
4535 | { | |
4536 | voptgenerror | |
4537 | (FLG_MACROPARAMS, | |
4538 | message ("Operand of %s is macro parameter (non-functional): %s", | |
4539 | lltok_unparse (op), exprNode_unparse (ret)), | |
4540 | e->loc); | |
4541 | } | |
4542 | else | |
4543 | { | |
4544 | exprNode_checkSet (ret, e->sref); | |
4545 | } | |
4546 | ||
4547 | if (ctype_isForceRealNumeric (&tr) || ctype_isRealAP (tr)) | |
4548 | { | |
4549 | } | |
4550 | else | |
4551 | { | |
4552 | if (context_msgStrictOps ()) | |
4553 | { | |
4554 | voptgenerror | |
4555 | (FLG_STRICTOPS, | |
4556 | message ("Operand of %s is non-numeric (%t): %s", | |
4557 | lltok_unparse (op), te, exprNode_unparse (ret)), | |
4558 | e->loc); | |
4559 | } | |
4560 | ret->typ = ctype_int; | |
4561 | } | |
4562 | ||
4563 | /* start modifications */ | |
4564 | /* added by Seejo on 4/16/2000 */ | |
4565 | ||
4566 | /* Arithmetic operations on pointers wil modify the size/len/null terminated | |
4567 | status */ | |
4568 | if ((sRef_isPossiblyNullTerminated (e->sref)) | |
4569 | || (sRef_isNullTerminated(e->sref))) { | |
4570 | ret->sref = sRef_copy (e->sref); | |
4571 | ||
4572 | /* Operator : ++ */ | |
4573 | if (lltok_getTok (op) == INC_OP) { | |
4574 | if (sRef_getSize(e->sref) > 0) { | |
4575 | ||
4576 | sRef_setSize (ret->sref, sRef_getSize(e->sref) - 1); | |
4577 | ||
4578 | if (sRef_getLen(e->sref) == 1) { /* i.e. the first character is \0 */ | |
4579 | /* Assumption: there is only 1 \0 in the buffer */ | |
4580 | /* This will not be correct if there are 2 \0's in the buffer */ | |
4581 | sRef_setNotNullTerminatedState(ret->sref); | |
4582 | sRef_resetLen (ret->sref); | |
4583 | } else { | |
4584 | sRef_setNullTerminatedState(ret->sref); | |
4585 | sRef_setLen (ret->sref, sRef_getLen(e->sref) - 1); | |
4586 | } | |
4587 | } | |
4588 | } | |
4589 | ||
4590 | /* Operator : -- */ | |
4591 | if (lltok_getTok (op) == DEC_OP) { | |
4592 | if (sRef_getSize(e->sref) >= 0) { | |
4593 | sRef_setSize (ret->sref, sRef_getSize(e->sref) + 1); | |
4594 | sRef_setLen (ret->sref, sRef_getLen(e->sref) + 1); | |
4595 | } | |
4596 | } | |
4597 | } | |
4598 | ||
4599 | /* end modifications */ | |
4600 | ||
4601 | checkMod = TRUE; | |
4602 | break; | |
4603 | ||
4604 | case TMINUS: | |
4605 | case TPLUS: | |
4606 | if (ctype_isForceRealNumeric (&tr)) | |
4607 | { | |
4608 | if (opid == TMINUS) | |
4609 | { | |
4610 | ret->val = multiVal_invert (exprNode_getValue (e)); | |
4611 | } | |
4612 | else | |
4613 | { | |
4614 | ret->val = multiVal_copy (exprNode_getValue (e)); | |
4615 | } | |
4616 | } | |
4617 | else | |
4618 | { | |
4619 | if (context_msgStrictOps ()) | |
4620 | { | |
4621 | voptgenerror | |
4622 | (FLG_STRICTOPS, | |
4623 | message ("Operand of %s is non-numeric (%t): %s", | |
4624 | lltok_unparse (op), te, exprNode_unparse (ret)), | |
4625 | e->loc); | |
4626 | } | |
4627 | ||
4628 | ret->typ = ctype_int; | |
4629 | } | |
4630 | break; | |
4631 | ||
4632 | case TEXCL: /* maybe this should be restricted */ | |
4633 | guardSet_flip (ret->guards); | |
4634 | ||
4635 | if (ctype_isRealBool (te) || ctype_isUnknown (te)) | |
4636 | { | |
4637 | ; | |
4638 | } | |
4639 | else | |
4640 | { | |
4641 | if (ctype_isRealPointer (tr)) | |
4642 | { | |
4643 | if (sRef_isKnown (e->sref)) | |
4644 | { | |
4645 | ret->guards = guardSet_addFalseGuard (ret->guards, e->sref); | |
4646 | } | |
4647 | ||
4648 | voptgenerror2n | |
4649 | (FLG_BOOLOPS, FLG_PTRNEGATE, | |
4650 | message ("Operand of %s is non-boolean (%t): %s", | |
4651 | lltok_unparse (op), te, exprNode_unparse (ret)), | |
4652 | e->loc); | |
4653 | } | |
4654 | else | |
4655 | { | |
4656 | voptgenerror | |
4657 | (FLG_BOOLOPS, | |
4658 | message ("Operand of %s is non-boolean (%t): %s", | |
4659 | lltok_unparse (op), te, exprNode_unparse (ret)), | |
4660 | e->loc); | |
4661 | } | |
4662 | ||
4663 | ret->typ = ctype_bool; | |
4664 | } | |
4665 | break; | |
4666 | ||
4667 | case TTILDE: | |
4668 | if (ctype_isForceRealInt (&tr)) | |
4669 | { | |
4670 | } | |
4671 | else | |
4672 | { | |
4673 | if (context_msgStrictOps ()) | |
4674 | { | |
4675 | voptgenerror | |
4676 | (FLG_STRICTOPS, | |
4677 | message ("Operand of %s is non-integer (%t): %s", | |
4678 | lltok_unparse (op), te, exprNode_unparse (ret)), | |
4679 | e->loc); | |
4680 | } | |
4681 | ||
4682 | if (ctype_isInt (e->typ)) | |
4683 | { | |
4684 | ret->typ = e->typ; | |
4685 | } | |
4686 | else | |
4687 | { | |
4688 | ret->typ = ctype_int; | |
4689 | } | |
4690 | } | |
4691 | break; | |
4692 | ||
4693 | case TAMPERSAND: | |
4694 | ret->typ = ctype_makePointer (e->typ); | |
4695 | ||
4696 | if (sRef_isKnown (e->sref)) | |
4697 | { | |
4698 | ret->sref = sRef_makeAddress (e->sref); | |
4699 | } | |
4700 | ||
4701 | break; | |
4702 | ||
4703 | case TMULT: | |
4704 | ||
4705 | if (ctype_isAP (tr)) | |
4706 | { | |
4707 | ret->typ = ctype_baseArrayPtr (e->typ); | |
4708 | } | |
4709 | else | |
4710 | { | |
4711 | if (ctype_isKnown (te)) | |
4712 | { | |
4713 | if (ctype_isFunction (te)) | |
4714 | { | |
4715 | ret->typ = e->typ; | |
4716 | ||
4717 | voptgenerror | |
4718 | (FLG_FCNDEREF, | |
4719 | message ("Dereference of function type (%t): %s", | |
4720 | te, exprNode_unparse (ret)), | |
4721 | e->loc); | |
4722 | } | |
4723 | else | |
4724 | { | |
4725 | voptgenerror (FLG_TYPE, | |
4726 | message ("Dereference of non-pointer (%t): %s", | |
4727 | te, exprNode_unparse (ret)), | |
4728 | e->loc); | |
4729 | ret->typ = ctype_unknown; | |
4730 | } | |
4731 | } | |
4732 | else | |
4733 | { | |
4734 | ret->typ = ctype_unknown; | |
4735 | } | |
4736 | ||
4737 | } | |
4738 | ||
4739 | if (sRef_isKnown (e->sref)) | |
4740 | { | |
4741 | DPRINTF (("Checking possibly null: %s", sRef_unparseFull (e->sref))); | |
4742 | ||
4743 | if (sRef_possiblyNull (e->sref)) | |
4744 | { | |
4745 | DPRINTF (("Checking possibly null: %s", sRef_unparse (e->sref))); | |
4746 | if (!usymtab_isGuarded (e->sref) && !context_inProtectVars ()) | |
4747 | { | |
4748 | if (optgenerror | |
4749 | (FLG_NULLDEREF, | |
4750 | message ("Dereference of %s pointer %q: %s", | |
4751 | sRef_nullMessage (e->sref), | |
4752 | sRef_unparse (e->sref), | |
4753 | exprNode_unparse (ret)), | |
4754 | e->loc)) | |
4755 | { | |
4756 | sRef_showNullInfo (e->sref); | |
4757 | sRef_setNotNull (e->sref, e->loc); /* suppress future messages */ | |
4758 | } | |
4759 | } | |
4760 | } | |
4761 | ||
4762 | ret->sref = sRef_makePointer (e->sref); | |
4763 | } | |
4764 | break; | |
4765 | ||
4766 | default: | |
4767 | llbug (message ("exprNode_preOp: unhandled op: %s", lltok_unparse (op))); | |
4768 | } | |
4769 | ||
4770 | if (checkMod) | |
4771 | { | |
4772 | exprNode_checkModify (e, ret); | |
4773 | } | |
4774 | ||
4775 | return ret; | |
4776 | } | |
4777 | ||
4778 | /* | |
4779 | ** any reason to disallow sizeof (abstract type) ? | |
4780 | */ | |
4781 | ||
4782 | /* | |
4783 | ** used by both sizeof | |
4784 | */ | |
4785 | ||
4786 | static | |
4787 | ctype sizeof_resultType (void) | |
4788 | { | |
4789 | static ctype sizet = ctype_unknown; | |
4790 | ||
4791 | if (ctype_isUnknown (sizet)) | |
4792 | { | |
4793 | if (usymtab_existsType (cstring_makeLiteralTemp ("size_t"))) | |
4794 | { | |
4795 | sizet = uentry_getAbstractType (usymtab_lookup (cstring_makeLiteralTemp ("size_t"))); | |
4796 | } | |
4797 | else | |
4798 | { | |
4799 | sizet = ctype_ulint; | |
4800 | } | |
4801 | } | |
4802 | return sizet; | |
4803 | } | |
4804 | ||
4805 | exprNode | |
4806 | exprNode_sizeofType (/*@only@*/ qtype qt) | |
4807 | { | |
4808 | exprNode ret = exprNode_create (sizeof_resultType ()); | |
4809 | ctype ct = qtype_getType (qt); | |
4810 | ||
4811 | ret->kind = XPR_SIZEOFT; | |
4812 | ret->edata = exprData_makeSizeofType (qt); | |
4813 | ||
4814 | voptgenerror (FLG_SIZEOFTYPE, | |
4815 | message ("Parameter to sizeof is type %s: %s", | |
4816 | ctype_unparse (ct), | |
4817 | exprNode_unparse (ret)), | |
4818 | ret->loc); | |
4819 | ||
4820 | return (ret); | |
4821 | } | |
4822 | ||
4823 | exprNode | |
4824 | exprNode_alignofType (/*@only@*/ qtype qt) | |
4825 | { | |
4826 | exprNode ret = exprNode_create (sizeof_resultType ()); | |
4827 | ctype ct = qtype_getType (qt); | |
4828 | ||
4829 | ret->kind = XPR_ALIGNOFT; | |
4830 | ret->edata = exprData_makeSizeofType (qt); | |
4831 | ||
4832 | voptgenerror (FLG_SIZEOFTYPE, | |
4833 | message ("Parameter to alignof is type %s: %s", | |
4834 | ctype_unparse (ct), | |
4835 | exprNode_unparse (ret)), | |
4836 | ret->loc); | |
4837 | ||
4838 | return (ret); | |
4839 | } | |
4840 | ||
4841 | exprNode exprNode_offsetof (qtype qt, cstringList s) | |
4842 | { | |
4843 | exprNode ret = exprNode_create (sizeof_resultType ()); | |
4844 | ctype ct = qtype_getType (qt); | |
4845 | ||
4846 | ret->kind = XPR_OFFSETOF; | |
4847 | ret->edata = exprData_makeOffsetof (qt, s); | |
4848 | ||
4849 | if (!ctype_isRealSU (ct)) | |
4850 | { | |
4851 | voptgenerror (FLG_TYPE, | |
4852 | message ("First parameter to offsetof is not a " | |
4853 | "struct or union type (type %s): %s", | |
4854 | ctype_unparse (ct), | |
4855 | exprNode_unparse (ret)), | |
4856 | ret->loc); | |
4857 | } | |
4858 | else | |
4859 | { | |
4860 | ctype lt = ct; | |
4861 | ||
4862 | cstringList_elements (s, el) { | |
4863 | uentryList fields; | |
4864 | uentry fld; | |
4865 | ||
4866 | if (ctype_isUndefined (lt)) | |
4867 | { | |
4868 | break; | |
4869 | } | |
4870 | else if (!ctype_isRealSU (lt)) | |
4871 | { | |
4872 | voptgenerror (FLG_TYPE, | |
4873 | message ("Inner offsetof type is not a " | |
4874 | "struct or union type (type %s before field %s): %s", | |
4875 | ctype_unparse (lt), el, | |
4876 | exprNode_unparse (ret)), | |
4877 | ret->loc); | |
4878 | break; | |
4879 | } | |
4880 | else | |
4881 | { | |
4882 | fields = ctype_getFields (ctype_realType (lt)); | |
4883 | fld = uentryList_lookupField (fields, el); | |
4884 | DPRINTF (("Try: %s / %s", ctype_unparse (lt), el)); | |
4885 | ||
4886 | if (uentry_isUndefined (fld)) | |
4887 | { | |
4888 | if (ctype_equal (lt, ct)) { | |
4889 | voptgenerror (FLG_TYPE, | |
4890 | message ("Field %s in offsetof is not the " | |
4891 | "name of a field of %s: %s", | |
4892 | el, | |
4893 | ctype_unparse (ct), | |
4894 | exprNode_unparse (ret)), | |
4895 | ret->loc); | |
4896 | } else { | |
4897 | voptgenerror (FLG_TYPE, | |
4898 | message ("Deep field %s in offsetof is not the " | |
4899 | "name of a field of %s: %s", | |
4900 | el, | |
4901 | ctype_unparse (lt), | |
4902 | exprNode_unparse (ret)), | |
4903 | ret->loc); | |
4904 | } | |
4905 | } | |
4906 | else | |
4907 | { | |
4908 | lt = uentry_getType (fld); | |
4909 | } | |
4910 | } | |
4911 | } end_cstringList_elements; | |
4912 | ||
4913 | /* Should report error if its a bit field - behavior is undefined! */ | |
4914 | } | |
4915 | ||
4916 | return (ret); | |
4917 | } | |
4918 | ||
4919 | /*@only@*/ exprNode | |
4920 | exprNode_sizeofExpr (/*@only@*/ exprNode e) | |
4921 | { | |
4922 | exprNode ret; | |
4923 | ||
4924 | if (exprNode_isUndefined (e)) | |
4925 | { | |
4926 | ret = exprNode_createLoc (ctype_unknown, fileloc_copy (g_currentloc)); | |
4927 | ret->edata = exprData_makeSingle (e); | |
4928 | ret->typ = sizeof_resultType (); | |
4929 | ret->kind = XPR_SIZEOF; | |
4930 | } | |
4931 | else | |
4932 | { | |
4933 | uentry u = exprNode_getUentry (e); | |
4934 | ||
4935 | ret = exprNode_createPartialCopy (e); | |
4936 | ret->edata = exprData_makeSingle (e); | |
4937 | ||
4938 | ret->typ = sizeof_resultType (); | |
4939 | ret->kind = XPR_SIZEOF; | |
4940 | ||
4941 | if (uentry_isValid (u) | |
4942 | && uentry_isRefParam (u) | |
4943 | && ctype_isRealArray (uentry_getType (u))) | |
4944 | { | |
4945 | voptgenerror | |
4946 | (FLG_SIZEOFFORMALARRAY, | |
4947 | message ("Parameter to sizeof is an array-type function parameter: %s", | |
4948 | exprNode_unparse (ret)), | |
4949 | ret->loc); | |
4950 | } | |
4951 | } | |
4952 | ||
4953 | /* | |
4954 | ** sizeof (x) doesn't "really" use x | |
4955 | */ | |
4956 | ||
4957 | return (ret); | |
4958 | } | |
4959 | ||
4960 | /*@only@*/ exprNode | |
4961 | exprNode_alignofExpr (/*@only@*/ exprNode e) | |
4962 | { | |
4963 | exprNode ret; | |
4964 | ||
4965 | if (exprNode_isUndefined (e)) | |
4966 | { | |
4967 | ret = exprNode_createLoc (ctype_unknown, fileloc_copy (g_currentloc)); | |
4968 | } | |
4969 | else | |
4970 | { | |
4971 | ret = exprNode_createPartialCopy (e); | |
4972 | } | |
4973 | ||
4974 | ret->edata = exprData_makeSingle (e); | |
4975 | ret->typ = sizeof_resultType (); | |
4976 | ret->kind = XPR_ALIGNOF; | |
4977 | ||
4978 | /* | |
4979 | ** sizeof (x) doesn't "really" use x | |
4980 | */ | |
4981 | ||
4982 | return (ret); | |
4983 | } | |
4984 | ||
4985 | /*@only@*/ exprNode | |
4986 | exprNode_cast (/*@only@*/ lltok tok, /*@only@*/ exprNode e, /*@only@*/ qtype q) | |
4987 | { | |
4988 | ctype c; | |
4989 | ctype t; | |
4990 | exprNode ret; | |
4991 | ||
4992 | if (exprNode_isError (e)) | |
4993 | { | |
4994 | qtype_free (q); | |
4995 | lltok_free (tok); | |
4996 | return exprNode_undefined; | |
4997 | } | |
4998 | ||
4999 | checkMacroParen (e); | |
5000 | ||
5001 | c = qtype_getType (q); | |
5002 | t = exprNode_getType (e); | |
5003 | ||
5004 | ret = exprNode_createPartialCopy (e); | |
5005 | ||
5006 | ret->loc = fileloc_update (ret->loc, lltok_getLoc (tok)); | |
5007 | ret->typ = c; | |
5008 | ret->kind = XPR_CAST; | |
5009 | ret->edata = exprData_makeCast (tok, e, q); | |
5010 | ||
5011 | ret->sref = sRef_copy (e->sref); | |
5012 | ||
5013 | DPRINTF (("Cast 2: -> %s", sRef_unparseFull (ret->sref))); | |
5014 | ||
5015 | if (!sRef_isConst (e->sref)) | |
5016 | { | |
5017 | usymtab_addForceMustAlias (ret->sref, e->sref); | |
5018 | } | |
5019 | ||
5020 | DPRINTF (("Cast 2: -> %s", sRef_unparseFull (ret->sref))); | |
5021 | sRef_setTypeFull (ret->sref, c); | |
5022 | DPRINTF (("Cast 2: -> %s", sRef_unparseFull (ret->sref))); | |
5023 | ||
5024 | /* | |
5025 | ** we allow | |
5026 | ** abstract -> void | |
5027 | ** 0 <-> abstract * | |
5028 | ** void * <-> abstract * (if FLG_ABSTVOIDP) | |
5029 | ** abstract * <-> void * (if FLG_ABSTVOIDP) | |
5030 | */ | |
5031 | ||
5032 | if (ctype_isVoid (c)) /* cast to void is always okay --- discard value */ | |
5033 | { | |
5034 | /* evans 2002-07-19: added this warning */ | |
5035 | DPRINTF (("Checking: %s / %s", exprNode_unparse (ret), sRef_unparseFull (ret->sref))); | |
5036 | if (sRef_isFresh (ret->sref)) | |
5037 | { | |
5038 | voptgenerror | |
5039 | (FLG_MUSTFREEFRESH, | |
5040 | message ("New fresh storage %q(type %s) cast to void (not released): %s", | |
5041 | sRef_unparseOpt (ret->sref), | |
5042 | ctype_unparse (exprNode_getType (ret)), | |
5043 | exprNode_unparse (ret)), | |
5044 | exprNode_loc (ret)); | |
5045 | } | |
5046 | } | |
5047 | else if (ctype_isRealAP (c)) /* casting to array or pointer */ | |
5048 | { | |
5049 | ctype bc = ctype_getBaseType (c); | |
5050 | ctype bt = ctype_getBaseType (t); | |
5051 | ctype rt = ctype_realType (t); | |
5052 | ||
5053 | if (ctype_isFunction (ctype_baseArrayPtr (ctype_realType (c))) | |
5054 | && (ctype_isArrayPtr (rt) | |
5055 | && !ctype_isFunction (ctype_realType (ctype_baseArrayPtr (rt))))) | |
5056 | { | |
5057 | voptgenerror | |
5058 | (FLG_CASTFCNPTR, | |
5059 | message ("Cast from function pointer type (%t) to " | |
5060 | "non-function pointer (%t): %s", | |
5061 | c, t, exprNode_unparse (ret)), | |
5062 | e->loc); | |
5063 | } | |
5064 | ||
5065 | if (!ctype_isFunction (ctype_baseArrayPtr (c)) | |
5066 | && (ctype_isArrayPtr (rt) | |
5067 | && ctype_isFunction (ctype_realType (ctype_baseArrayPtr (rt))))) | |
5068 | { | |
5069 | voptgenerror | |
5070 | (FLG_CASTFCNPTR, | |
5071 | message ("Cast from non-function pointer type (%t) to " | |
5072 | "function pointer (%t): %s", | |
5073 | c, t, exprNode_unparse (ret)), | |
5074 | e->loc); | |
5075 | } | |
5076 | ||
5077 | if (exprNode_isZero (e) && context_getFlag (FLG_ZEROPTR) && | |
5078 | !(ctype_isRealAbstract (bc) | |
5079 | && context_hasAccess (ctype_typeId (bc)))) | |
5080 | { | |
5081 | ; /* okay to cast zero */ | |
5082 | } | |
5083 | else | |
5084 | { | |
5085 | if (ctype_isRealAbstract (bc) | |
5086 | && !context_hasAccess (ctype_typeId (bc))) | |
5087 | { | |
5088 | if (ctype_isVoidPointer (t) || ctype_isUnknown (t)) | |
5089 | { | |
5090 | vnoptgenerror | |
5091 | (FLG_ABSTVOIDP, | |
5092 | message ("Cast to underlying abstract type %t: %s", | |
5093 | c, exprNode_unparse (ret)), | |
5094 | e->loc); | |
5095 | } | |
5096 | else | |
5097 | { | |
5098 | voptgenerror | |
5099 | (FLG_ABSTRACT, | |
5100 | message ("Cast to underlying abstract type %t: %s", | |
5101 | c, exprNode_unparse (ret)), | |
5102 | e->loc); | |
5103 | } | |
5104 | } | |
5105 | ||
5106 | if (ctype_isRealAbstract (bt) | |
5107 | && !context_hasAccess (ctype_typeId (bt))) | |
5108 | { | |
5109 | if (ctype_isUnknown (c) || ctype_isVoidPointer (c)) | |
5110 | { | |
5111 | vnoptgenerror | |
5112 | (FLG_ABSTVOIDP, | |
5113 | message ("Cast from underlying abstract type %t: %s", | |
5114 | t, exprNode_unparse (ret)), | |
5115 | e->loc); | |
5116 | } | |
5117 | else | |
5118 | { | |
5119 | voptgenerror | |
5120 | (FLG_ABSTRACT, | |
5121 | message ("Cast from underlying abstract type %t: %s", | |
5122 | t, exprNode_unparse (ret)), | |
5123 | e->loc); | |
5124 | } | |
5125 | } | |
5126 | } | |
5127 | } | |
5128 | else | |
5129 | { | |
5130 | ctype bt = ctype_realType (ctype_getBaseType (t)); | |
5131 | ctype bc = ctype_realType (ctype_getBaseType (c)); | |
5132 | ||
5133 | if (ctype_isAbstract (bt) && !context_hasAccess (ctype_typeId (bt))) | |
5134 | { | |
5135 | if (ctype_match (c, t)) | |
5136 | { | |
5137 | if (ctype_equal (c, t)) | |
5138 | { | |
5139 | voptgenerror | |
5140 | (FLG_TYPE, | |
5141 | message ("Redundant cast involving abstract type %t: %s", | |
5142 | bt, exprNode_unparse (ret)), | |
5143 | e->loc); | |
5144 | } | |
5145 | } | |
5146 | else | |
5147 | { | |
5148 | voptgenerror | |
5149 | (FLG_ABSTRACT, | |
5150 | message ("Cast from abstract type %t: %s", | |
5151 | bt, exprNode_unparse (ret)), | |
5152 | e->loc); | |
5153 | } | |
5154 | } | |
5155 | ||
5156 | if (ctype_isAbstract (bc) | |
5157 | && !context_hasAccess (ctype_typeId (bc))) | |
5158 | { | |
5159 | if (ctype_match (c, t)) | |
5160 | { | |
5161 | ; | |
5162 | } | |
5163 | else | |
5164 | { | |
5165 | if (ctype_isNumAbstract (bc)) | |
5166 | { | |
5167 | if (exprNode_isNumLiteral (e)) | |
5168 | { | |
5169 | voptgenerror | |
5170 | (FLG_NUMABSTRACTCAST, | |
5171 | message ("Cast from literal to numabstract type %t: %s", bc, | |
5172 | exprNode_unparse (ret)), | |
5173 | e->loc); | |
5174 | } | |
5175 | else | |
5176 | { | |
5177 | voptgenerror | |
5178 | (FLG_NUMABSTRACT, | |
5179 | message ("Cast to numabstract type %t: %s", bc, | |
5180 | exprNode_unparse (ret)), | |
5181 | e->loc); | |
5182 | } | |
5183 | } | |
5184 | else | |
5185 | { | |
5186 | DPRINTF (("No access to: %s / %d", | |
5187 | ctype_unparse (bc), ctype_typeId (bc))); | |
5188 | DPRINTF (("Context %s %s", | |
5189 | bool_unparse (context_inFunctionLike ()), | |
5190 | context_unparse ())); | |
5191 | voptgenerror | |
5192 | (FLG_ABSTRACT, | |
5193 | message ("Cast to abstract type %t: %s", bc, | |
5194 | exprNode_unparse (ret)), | |
5195 | e->loc); | |
5196 | } | |
5197 | } | |
5198 | } | |
5199 | } | |
5200 | ||
5201 | if (ctype_isAbstract (c)) | |
5202 | { | |
5203 | if (sRef_isExposed (e->sref) || sRef_isOnly (e->sref)) | |
5204 | { | |
5205 | /* okay, cast exposed to abstract */ | |
5206 | sRef_clearExKindComplete (ret->sref, fileloc_undefined); | |
5207 | } | |
5208 | else | |
5209 | { | |
5210 | if (ctype_isVisiblySharable (t) | |
5211 | && sRef_isExternallyVisible (e->sref) | |
5212 | && !(ctype_isAbstract (t) | |
5213 | && context_hasAccess (ctype_typeId (t)))) | |
5214 | { | |
5215 | voptgenerror | |
5216 | (FLG_CASTEXPOSE, | |
5217 | message ("Cast to abstract type from externally visible " | |
5218 | "mutable storage exposes rep of %s: %s", | |
5219 | ctype_unparse (c), | |
5220 | exprNode_unparse (e)), | |
5221 | e->loc); | |
5222 | } | |
5223 | } | |
5224 | } | |
5225 | ||
5226 | return (ret); | |
5227 | } | |
5228 | ||
5229 | static bool | |
5230 | evaluationOrderUndefined (lltok op) | |
5231 | { | |
5232 | int opid = lltok_getTok (op); | |
5233 | ||
5234 | return (opid != AND_OP && opid != OR_OP); | |
5235 | } | |
5236 | ||
5237 | static bool checkIntegral (/*@notnull@*/ exprNode e1, | |
5238 | /*@notnull@*/ exprNode e2, | |
5239 | /*@notnull@*/ exprNode ret, | |
5240 | lltok op) | |
5241 | { | |
5242 | bool error = FALSE; | |
5243 | ||
5244 | ctype te1 = exprNode_getType (e1); | |
5245 | ctype te2 = exprNode_getType (e2); | |
5246 | ||
5247 | ctype tr1 = ctype_realishType (te1); | |
5248 | ctype tr2 = ctype_realishType (te2); | |
5249 | ||
5250 | if (ctype_isForceRealInt (&tr1) && ctype_isForceRealInt (&tr2)) | |
5251 | { | |
5252 | ; | |
5253 | } | |
5254 | else | |
5255 | { | |
5256 | if (context_msgStrictOps ()) | |
5257 | { | |
5258 | if (!ctype_isInt (tr1) && !ctype_isInt (tr2)) | |
5259 | { | |
5260 | if (ctype_sameName (te1, te2)) | |
5261 | { | |
5262 | error = optgenerror | |
5263 | (FLG_STRICTOPS, | |
5264 | message ("Operands of %s are non-integer (%t): %s", | |
5265 | lltok_unparse (op), te1, | |
5266 | exprNode_unparse (ret)), | |
5267 | e1->loc); | |
5268 | } | |
5269 | else | |
5270 | { | |
5271 | error = optgenerror | |
5272 | (FLG_STRICTOPS, | |
5273 | message ("Operands of %s are non-integers (%t, %t): %s", | |
5274 | lltok_unparse (op), te1, te2, | |
5275 | exprNode_unparse (ret)), | |
5276 | e1->loc); | |
5277 | } | |
5278 | } | |
5279 | else if (!ctype_isInt (tr1)) | |
5280 | { | |
5281 | error = optgenerror | |
5282 | (FLG_STRICTOPS, | |
5283 | message ("Left operand of %s is non-integer (%t): %s", | |
5284 | lltok_unparse (op), te1, exprNode_unparse (ret)), | |
5285 | e1->loc); | |
5286 | } | |
5287 | else | |
5288 | /* !ctype_isInt (te2) */ | |
5289 | { | |
5290 | error = optgenerror | |
5291 | (FLG_STRICTOPS, | |
5292 | message ("Right operand of %s is non-integer (%t): %s", | |
5293 | lltok_unparse (op), te2, exprNode_unparse (ret)), | |
5294 | e2->loc); | |
5295 | } | |
5296 | } | |
5297 | } | |
5298 | ||
5299 | return !error; | |
5300 | } | |
5301 | ||
5302 | /* | |
5303 | ** returns exprNode representing e1 op e2 | |
5304 | ** | |
5305 | ** uses msg if there are errors | |
5306 | ** can be used for both assignment ops and regular ops | |
5307 | ** | |
5308 | ** modifies e1 | |
5309 | */ | |
5310 | ||
5311 | static /*@only@*/ /*@notnull@*/ exprNode | |
5312 | exprNode_makeOp (/*@keep@*/ exprNode e1, /*@keep@*/ exprNode e2, | |
5313 | /*@keep@*/ lltok op) | |
5314 | { | |
5315 | ctype te1, te2, tr1, tr2, tret; | |
5316 | int opid = lltok_getTok (op); | |
5317 | bool hasError = FALSE; | |
5318 | exprNode ret; | |
5319 | ||
5320 | if (exprNode_isError (e1)) | |
5321 | { | |
5322 | ret = exprNode_createPartialNVCopy (e2); | |
5323 | } | |
5324 | else | |
5325 | { | |
5326 | ret = exprNode_createPartialNVCopy (e1); | |
5327 | } | |
5328 | ||
5329 | ret->val = multiVal_undefined; | |
5330 | ||
5331 | ret->kind = XPR_OP; | |
5332 | ret->edata = exprData_makeOp (e1, e2, op); | |
5333 | ||
5334 | if (exprNode_isError (e1) || exprNode_isError (e2)) | |
5335 | { | |
5336 | if (opid == TLT || opid == TGT || opid == LE_OP || opid == GE_OP | |
5337 | || opid == EQ_OP || opid == NE_OP | |
5338 | || opid == AND_OP || opid == OR_OP) | |
5339 | { | |
5340 | ret->typ = ctype_bool; | |
5341 | } | |
5342 | ||
5343 | if (exprNode_isDefined (e1)) | |
5344 | { | |
5345 | exprNode_checkUse (ret, e1->sref, e1->loc); | |
5346 | } | |
5347 | ||
5348 | if (exprNode_isDefined (e2)) | |
5349 | { | |
5350 | exprNode_mergeUSs (ret, e2); | |
5351 | exprNode_checkUse (ret, e2->sref, e2->loc); | |
5352 | } | |
5353 | ||
5354 | return ret; | |
5355 | } | |
5356 | ||
5357 | tret = ctype_unknown; | |
5358 | te1 = exprNode_getType (e1); | |
5359 | ||
5360 | DPRINTF (("te1 = %s / %s", exprNode_unparse (e1), ctype_unparse (te1))); | |
5361 | ||
5362 | te2 = exprNode_getType (e2); | |
5363 | ||
5364 | tr1 = ctype_realishType (te1); | |
5365 | tr2 = ctype_realishType (te2); | |
5366 | ||
5367 | if (opid == OR_OP) | |
5368 | { | |
5369 | ret->guards = guardSet_or (ret->guards, e2->guards); | |
5370 | } | |
5371 | else if (opid == AND_OP) | |
5372 | { | |
5373 | ret->guards = guardSet_and (ret->guards, e2->guards); | |
5374 | } | |
5375 | else | |
5376 | { | |
5377 | /* no guards */ | |
5378 | } | |
5379 | ||
5380 | if (opid == EQ_OP || opid == NE_OP) | |
5381 | { | |
5382 | exprNode temp1 = e1, temp2 = e2; | |
5383 | ||
5384 | /* could do NULL == x */ | |
5385 | ||
5386 | if (exprNode_isNullValue (e1) || exprNode_isUnknownConstant (e1)) | |
5387 | { | |
5388 | temp1 = e2; temp2 = e1; | |
5389 | } | |
5390 | ||
5391 | if (exprNode_isNullValue (temp2) || exprNode_isUnknownConstant (temp2)) | |
5392 | { | |
5393 | reflectNullTest (temp1, (opid == NE_OP)); | |
5394 | guardSet_free (ret->guards); | |
5395 | ret->guards = guardSet_copy (temp1->guards); | |
5396 | } | |
5397 | } | |
5398 | ||
5399 | if (opid == TLT || opid == TGT || opid == LE_OP || opid == GE_OP | |
5400 | || opid == EQ_OP || opid == NE_OP || opid == AND_OP || opid == OR_OP) | |
5401 | { | |
5402 | tret = ctype_bool; | |
5403 | } | |
5404 | ||
5405 | if (anyAbstract (tr1, tr2) && | |
5406 | (!((ctype_isRealBool (te1) || ctype_isRealBool (te2)) && | |
5407 | (opid == AND_OP || opid == OR_OP | |
5408 | || opid == EQ_OP || opid == NE_OP)))) | |
5409 | { | |
5410 | if (abstractOpError (tr1, tr2, op, e1, e2, e1->loc, e2->loc)) | |
5411 | { | |
5412 | tret = ctype_unknown; | |
5413 | goto skiprest; | |
5414 | } | |
5415 | } | |
5416 | ||
5417 | if (ctype_isUnknown (te1) || ctype_isUnknown (te2)) | |
5418 | { | |
5419 | /* unknown types, no comparisons possible */ | |
5420 | goto skiprest; | |
5421 | } | |
5422 | ||
5423 | switch (opid) | |
5424 | { | |
5425 | case TMULT: /* multiplication and division: */ | |
5426 | case TDIV: /* */ | |
5427 | case MUL_ASSIGN: /* numeric, numeric -> numeric */ | |
5428 | case DIV_ASSIGN: /* */ | |
5429 | if (opid == TMULT || opid == MUL_ASSIGN) | |
5430 | { | |
5431 | ret->val = multiVal_multiply (exprNode_getValue (e1), | |
5432 | exprNode_getValue (e2)); | |
5433 | } | |
5434 | else | |
5435 | { | |
5436 | ret->val = multiVal_divide (exprNode_getValue (e1), | |
5437 | exprNode_getValue (e2)); | |
5438 | } | |
5439 | ||
5440 | tret = checkNumerics (tr1, tr2, te1, te2, e1, e2, op); | |
5441 | break; | |
5442 | ||
5443 | case TPLUS: /* addition and subtraction: */ | |
5444 | case TMINUS: /* pointer, int -> pointer */ | |
5445 | case SUB_ASSIGN: /* int, pointer -> pointer */ | |
5446 | case ADD_ASSIGN: /* numeric, numeric -> numeric */ | |
5447 | if (opid == TPLUS || opid == ADD_ASSIGN) | |
5448 | { | |
5449 | ret->val = multiVal_add (exprNode_getValue (e1), | |
5450 | exprNode_getValue (e2)); | |
5451 | } | |
5452 | else | |
5453 | { | |
5454 | ret->val = multiVal_subtract (exprNode_getValue (e1), | |
5455 | exprNode_getValue (e2)); | |
5456 | } | |
5457 | ||
5458 | tr1 = ctype_fixArrayPtr (tr1); | |
5459 | ||
5460 | if ((ctype_isRealPointer (tr1) && !exprNode_isNullValue (e1)) | |
5461 | && (!ctype_isRealPointer (tr2) && ctype_isRealInt (tr2))) | |
5462 | { | |
5463 | /* pointer + int */ | |
5464 | ||
5465 | if (context_msgPointerArith ()) | |
5466 | { | |
5467 | voptgenerror | |
5468 | (FLG_POINTERARITH, | |
5469 | message ("Pointer arithmetic (%t, %t): %s", | |
5470 | te1, te2, exprNode_unparse (ret)), | |
5471 | e1->loc); | |
5472 | } | |
5473 | ||
5474 | /* | |
5475 | ** Swap terms so e1 is always the pointer | |
5476 | */ | |
5477 | ||
5478 | if (ctype_isRealPointer (tr1)) | |
5479 | { | |
5480 | ; | |
5481 | } | |
5482 | else | |
5483 | { | |
5484 | exprNode_swap (e1, e2); | |
5485 | } | |
5486 | ||
5487 | if (sRef_possiblyNull (e1->sref) | |
5488 | && !usymtab_isGuarded (e1->sref)) | |
5489 | { | |
5490 | voptgenerror | |
5491 | (FLG_NULLPOINTERARITH, | |
5492 | message ("Pointer arithmetic involving possibly " | |
5493 | "null pointer %s: %s", | |
5494 | exprNode_unparse (e1), | |
5495 | exprNode_unparse (ret)), | |
5496 | e1->loc); | |
5497 | } | |
5498 | ||
5499 | ret->sref = sRef_copy (e1->sref); | |
5500 | ||
5501 | /* start modifications */ | |
5502 | /* added by Seejo on 4/16/2000 */ | |
5503 | ||
5504 | /* Arithmetic operations on pointers wil modify the size/len/null terminated | |
5505 | status */ | |
5506 | if ((sRef_isPossiblyNullTerminated (e1->sref)) || (sRef_isNullTerminated(e1->sref))) { | |
5507 | int val; | |
5508 | /*drl 1-4-2002 | |
5509 | added ugly fixed to stop | |
5510 | program from crashing on point + int +int | |
5511 | one day I'll fix this or ask Seejo wtf the codes supposed to do. */ | |
5512 | ||
5513 | if (!multiVal_isInt (e2->val) ) | |
5514 | break; | |
5515 | /*end drl*/ | |
5516 | ||
5517 | val = (int) multiVal_forceInt (e2->val); | |
5518 | ||
5519 | /* Operator : + or += */ | |
5520 | if ((lltok_getTok (op) == TPLUS) || (lltok_getTok(op) == ADD_ASSIGN)) { | |
5521 | if (sRef_getSize(e1->sref) >= val) {/* Incrementing the pointer by | |
5522 | val should not result in a | |
5523 | size < 0 (size = 0 is ok !) */ | |
5524 | ||
5525 | sRef_setSize (ret->sref, sRef_getSize(e1->sref) - val); | |
5526 | ||
5527 | if (sRef_getLen(e1->sref) == val) { /* i.e. the character at posn val is \0 */ | |
5528 | sRef_setNotNullTerminatedState(ret->sref); | |
5529 | sRef_resetLen (ret->sref); | |
5530 | } else { | |
5531 | sRef_setNullTerminatedState(ret->sref); | |
5532 | sRef_setLen (ret->sref, sRef_getLen(e1->sref) - val); | |
5533 | } | |
5534 | } | |
5535 | } | |
5536 | ||
5537 | /* Operator : - or -= */ | |
5538 | if ((lltok_getTok (op) == TMINUS) || (lltok_getTok (op) == SUB_ASSIGN)) { | |
5539 | if (sRef_getSize(e1->sref) >= 0) { | |
5540 | sRef_setSize (ret->sref, sRef_getSize(e1->sref) + val); | |
5541 | sRef_setLen (ret->sref, sRef_getLen(e1->sref) + val); | |
5542 | } | |
5543 | } | |
5544 | } | |
5545 | ||
5546 | /* end modifications */ | |
5547 | ||
5548 | sRef_setNullError (ret->sref); | |
5549 | ||
5550 | /* | |
5551 | ** Fixed for 2.2c: the alias state of ptr + int is dependent, | |
5552 | ** since is points to storage that should not be deallocated | |
5553 | ** through this pointer. | |
5554 | */ | |
5555 | ||
5556 | if (sRef_isOnly (ret->sref) | |
5557 | || sRef_isFresh (ret->sref)) | |
5558 | { | |
5559 | sRef_setAliasKind (ret->sref, AK_DEPENDENT, exprNode_loc (ret)); | |
5560 | } | |
5561 | ||
5562 | tret = e1->typ; | |
5563 | } | |
5564 | else if ((!ctype_isRealPointer(tr1) && ctype_isRealInt (tr1)) | |
5565 | && (ctype_isRealPointer (tr2) && !exprNode_isNullValue (e2))) | |
5566 | { | |
5567 | if (context_msgPointerArith ()) | |
5568 | { | |
5569 | voptgenerror | |
5570 | (FLG_POINTERARITH, | |
5571 | message ("Pointer arithmetic (%t, %t): %s", | |
5572 | te1, te2, exprNode_unparse (ret)), | |
5573 | e1->loc); | |
5574 | } | |
5575 | ||
5576 | if (sRef_possiblyNull (e1->sref) | |
5577 | && !usymtab_isGuarded (e1->sref)) | |
5578 | { | |
5579 | voptgenerror | |
5580 | (FLG_NULLPOINTERARITH, | |
5581 | message ("Pointer arithmetic involving possibly " | |
5582 | "null pointer %s: %s", | |
5583 | exprNode_unparse (e2), | |
5584 | exprNode_unparse (ret)), | |
5585 | e2->loc); | |
5586 | } | |
5587 | ||
5588 | ret->sref = sRef_copy (e2->sref); | |
5589 | ||
5590 | /* start modifications */ | |
5591 | /* added by Seejo on 4/16/2000 */ | |
5592 | ||
5593 | /* Arithmetic operations on pointers wil modify the size/len/null terminated | |
5594 | status */ | |
5595 | ||
5596 | if ((sRef_isPossiblyNullTerminated (e2->sref)) || (sRef_isNullTerminated(e2->sref))) { | |
5597 | int val = (int) multiVal_forceInt (e1->val); | |
5598 | ||
5599 | /* Operator : + or += */ | |
5600 | if ((lltok_getTok (op) == TPLUS) || (lltok_getTok(op) == ADD_ASSIGN)) { | |
5601 | if (sRef_getSize(e2->sref) >= val) {/* Incrementing the pointer by | |
5602 | val should not result in a | |
5603 | size < 0 (size = 0 is ok !) */ | |
5604 | ||
5605 | sRef_setSize (ret->sref, sRef_getSize(e2->sref) - val); | |
5606 | ||
5607 | if (sRef_getLen(e2->sref) == val) { /* i.e. the character at posn val is \0 */ | |
5608 | sRef_setNotNullTerminatedState(ret->sref); | |
5609 | sRef_resetLen (ret->sref); | |
5610 | } else { | |
5611 | sRef_setNullTerminatedState(ret->sref); | |
5612 | sRef_setLen (ret->sref, sRef_getLen(e2->sref) - val); | |
5613 | } | |
5614 | } | |
5615 | } | |
5616 | ||
5617 | /* Operator : - or -= */ | |
5618 | if ((lltok_getTok (op) == TMINUS) || (lltok_getTok (op) == SUB_ASSIGN)) { | |
5619 | if (sRef_getSize(e2->sref) >= 0) { | |
5620 | sRef_setSize (ret->sref, sRef_getSize(e2->sref) + val); | |
5621 | sRef_setLen (ret->sref, sRef_getLen(e2->sref) + val); | |
5622 | } | |
5623 | } | |
5624 | } | |
5625 | /* end modifications */ | |
5626 | ||
5627 | sRef_setNullError (ret->sref); | |
5628 | ||
5629 | /* | |
5630 | ** Fixed for 2.2c: the alias state of ptr + int is dependent, | |
5631 | ** since is points to storage that should not be deallocated | |
5632 | ** through this pointer. | |
5633 | */ | |
5634 | ||
5635 | if (sRef_isOnly (ret->sref) | |
5636 | || sRef_isFresh (ret->sref)) { | |
5637 | sRef_setAliasKind (ret->sref, AK_DEPENDENT, exprNode_loc (ret)); | |
5638 | } | |
5639 | ||
5640 | tret = e2->typ; | |
5641 | ret->sref = e2->sref; | |
5642 | } | |
5643 | else | |
5644 | { | |
5645 | tret = checkNumerics (tr1, tr2, te1, te2, e1, e2, op); | |
5646 | } | |
5647 | ||
5648 | break; | |
5649 | ||
5650 | case LEFT_ASSIGN: | |
5651 | case RIGHT_ASSIGN: | |
5652 | case LEFT_OP: | |
5653 | case RIGHT_OP: | |
5654 | case TAMPERSAND: /* bitwise & */ | |
5655 | case AND_ASSIGN: | |
5656 | case TCIRC: /* ^ (XOR) */ | |
5657 | case TBAR: | |
5658 | case XOR_ASSIGN: | |
5659 | case OR_ASSIGN: | |
5660 | { | |
5661 | bool reported = FALSE; | |
5662 | ||
5663 | /* | |
5664 | ** Shift Operator | |
5665 | */ | |
5666 | ||
5667 | if (opid == LEFT_OP || opid == LEFT_ASSIGN | |
5668 | || opid == RIGHT_OP || opid == RIGHT_ASSIGN) | |
5669 | { | |
5670 | /* | |
5671 | ** evans 2002-01-01: fixed this to follow ISO 6.5.7. | |
5672 | */ | |
5673 | ||
5674 | if (!ctype_isUnsigned (tr2) | |
5675 | && !exprNode_isNonNegative (e2)) | |
5676 | { | |
5677 | reported = optgenerror | |
5678 | (FLG_SHIFTNEGATIVE, | |
5679 | message ("Right operand of %s may be negative (%t): %s", | |
5680 | lltok_unparse (op), te2, | |
5681 | exprNode_unparse (ret)), | |
5682 | e2->loc); | |
5683 | } | |
5684 | ||
5685 | if (!ctype_isUnsigned (tr1) | |
5686 | && !exprNode_isNonNegative (e1)) | |
5687 | { | |
5688 | reported = optgenerror | |
5689 | (FLG_SHIFTIMPLEMENTATION, | |
5690 | message ("Left operand of %s may be negative (%t): %s", | |
5691 | lltok_unparse (op), te1, | |
5692 | exprNode_unparse (ret)), | |
5693 | e1->loc); | |
5694 | } | |
5695 | ||
5696 | /* | |
5697 | ** Should check size of right operand also... | |
5698 | */ | |
5699 | ||
5700 | } | |
5701 | else | |
5702 | { | |
5703 | if (!ctype_isUnsigned (tr1)) | |
5704 | { | |
5705 | if (exprNode_isNonNegative (e1)) { | |
5706 | ; | |
5707 | } else { | |
5708 | reported = optgenerror | |
5709 | (FLG_BITWISEOPS, | |
5710 | message ("Left operand of %s is not unsigned value (%t): %s", | |
5711 | lltok_unparse (op), te1, | |
5712 | exprNode_unparse (ret)), | |
5713 | e1->loc); | |
5714 | ||
5715 | if (reported) { | |
5716 | te1 = ctype_uint; | |
5717 | } | |
5718 | } | |
5719 | } | |
5720 | else | |
5721 | { | |
5722 | if (!ctype_isUnsigned (tr2)) | |
5723 | { | |
5724 | if (!exprNode_isNonNegative (e2)) { | |
5725 | reported = optgenerror | |
5726 | (FLG_BITWISEOPS, | |
5727 | message ("Right operand of %s is not unsigned value (%t): %s", | |
5728 | lltok_unparse (op), te2, | |
5729 | exprNode_unparse (ret)), | |
5730 | e2->loc); | |
5731 | } | |
5732 | } | |
5733 | } | |
5734 | } | |
5735 | ||
5736 | if (!reported) | |
5737 | { | |
5738 | if (!checkIntegral (e1, e2, ret, op)) { | |
5739 | te1 = ctype_unknown; | |
5740 | } | |
5741 | } | |
5742 | ||
5743 | DPRINTF (("Set: %s", ctype_unparse (te1))); | |
5744 | ||
5745 | /* | |
5746 | ** tret is the widest type of te1 and te2 | |
5747 | */ | |
5748 | ||
5749 | tret = ctype_widest (te1, te2); | |
5750 | break; | |
5751 | } | |
5752 | case MOD_ASSIGN: | |
5753 | case TPERCENT: | |
5754 | if (checkIntegral (e1, e2, ret, op)) { | |
5755 | tret = te1; | |
5756 | } else { | |
5757 | tret = ctype_unknown; | |
5758 | } | |
5759 | break; | |
5760 | case EQ_OP: | |
5761 | case NE_OP: | |
5762 | case TLT: /* comparisons */ | |
5763 | case TGT: /* numeric, numeric -> bool */ | |
5764 | ||
5765 | DPRINTF (("Here we go: %s / %s", | |
5766 | ctype_unparse (tr1), ctype_unparse (tr2))); | |
5767 | ||
5768 | if ((ctype_isReal (tr1) && !ctype_isInt (tr1)) | |
5769 | || (ctype_isReal (tr2) && !ctype_isInt (tr2))) | |
5770 | { | |
5771 | ctype rtype = tr1; | |
5772 | bool fepsilon = FALSE; | |
5773 | ||
5774 | if (!ctype_isReal (rtype) || ctype_isInt (rtype)) | |
5775 | { | |
5776 | rtype = tr2; | |
5777 | } | |
5778 | ||
5779 | if (opid == TLT || opid == TGT) | |
5780 | { | |
5781 | uentry ue1 = exprNode_getUentry (e1); | |
5782 | uentry ue2 = exprNode_getUentry (e2); | |
5783 | ||
5784 | /* | |
5785 | ** FLT_EPSILON, etc. really is a variable, not | |
5786 | ** a constant. | |
5787 | */ | |
5788 | ||
5789 | if (uentry_isVariable (ue1)) | |
5790 | { | |
5791 | cstring uname = uentry_rawName (ue1); | |
5792 | ||
5793 | if (cstring_equalLit (uname, "FLT_EPSILON") | |
5794 | || cstring_equalLit (uname, "DBL_EPSILON") | |
5795 | || cstring_equalLit (uname, "LDBL_EPSILON")) | |
5796 | { | |
5797 | fepsilon = TRUE; | |
5798 | } | |
5799 | } | |
5800 | ||
5801 | if (uentry_isVariable (ue2)) | |
5802 | { | |
5803 | cstring uname = uentry_rawName (ue2); | |
5804 | ||
5805 | if (cstring_equalLit (uname, "FLT_EPSILON") | |
5806 | || cstring_equalLit (uname, "DBL_EPSILON") | |
5807 | || cstring_equalLit (uname, "LDBL_EPSILON")) | |
5808 | { | |
5809 | fepsilon = TRUE; | |
5810 | } | |
5811 | } | |
5812 | } | |
5813 | ||
5814 | if (fepsilon) | |
5815 | { | |
5816 | ; /* Don't complain. */ | |
5817 | } | |
5818 | else | |
5819 | { | |
5820 | voptgenerror | |
5821 | (FLG_REALCOMPARE, | |
5822 | message ("Dangerous comparison involving %s types: %s", | |
5823 | ctype_unparse (rtype), | |
5824 | exprNode_unparse (ret)), | |
5825 | ret->loc); | |
5826 | } | |
5827 | } | |
5828 | /*@fallthrough@*/ | |
5829 | case LE_OP: | |
5830 | case GE_OP: | |
5831 | ||
5832 | /* | |
5833 | ** Types should match. | |
5834 | */ | |
5835 | ||
5836 | DPRINTF (("Match types: %s / %s", exprNode_unparse (e1), | |
5837 | exprNode_unparse (e2))); | |
5838 | ||
5839 | if (!exprNode_matchTypes (e1, e2)) | |
5840 | { | |
5841 | hasError = gentypeerror | |
5842 | (te1, e1, te2, e2, | |
5843 | message ("Operands of %s have incompatible types (%t, %t): %s", | |
5844 | lltok_unparse (op), te1, te2, exprNode_unparse (ret)), | |
5845 | e1->loc); | |
5846 | ||
5847 | } | |
5848 | ||
5849 | if (hasError | |
5850 | || (ctype_isForceRealNumeric (&tr1) | |
5851 | && ctype_isForceRealNumeric (&tr2)) || | |
5852 | (ctype_isRealPointer (tr1) && ctype_isRealPointer (tr2))) | |
5853 | { | |
5854 | ; /* okay */ | |
5855 | } | |
5856 | else | |
5857 | { | |
5858 | if ((ctype_isRealNumeric (tr1) && ctype_isRealPointer (tr2)) || | |
5859 | (ctype_isRealPointer (tr1) && ctype_isRealNumeric (tr2))) | |
5860 | { | |
5861 | voptgenerror | |
5862 | (FLG_PTRNUMCOMPARE, | |
5863 | message ("Comparison of pointer and numeric (%t, %t): %s", | |
5864 | te1, te2, exprNode_unparse (ret)), | |
5865 | e1->loc); | |
5866 | } | |
5867 | else | |
5868 | { | |
5869 | (void) checkNumerics (tr1, tr2, te1, te2, e1, e2, op); | |
5870 | } | |
5871 | tret = ctype_bool; | |
5872 | } | |
5873 | ||
5874 | /* certain comparisons on unsigned's and zero look suspicious */ | |
5875 | ||
5876 | if (opid == TLT || opid == LE_OP || opid == GE_OP) | |
5877 | { | |
5878 | if ((ctype_isUnsigned (tr1) && exprNode_isZero (e2)) | |
5879 | || (ctype_isUnsigned (tr2) && exprNode_isZero (e1))) | |
5880 | { | |
5881 | voptgenerror | |
5882 | (FLG_UNSIGNEDCOMPARE, | |
5883 | message ("Comparison of unsigned value involving zero: %s", | |
5884 | exprNode_unparse (ret)), | |
5885 | e1->loc); | |
5886 | } | |
5887 | } | |
5888 | ||
5889 | /* EQ_OP should NOT be used with booleans (unless one is FALSE) */ | |
5890 | ||
5891 | if ((opid == EQ_OP || opid == NE_OP) && | |
5892 | ctype_isDirectBool (tr1) && ctype_isDirectBool (tr2)) | |
5893 | { | |
5894 | /* | |
5895 | ** is one a variable? | |
5896 | */ | |
5897 | ||
5898 | if (uentry_isVariable (exprNode_getUentry (e1)) | |
5899 | || uentry_isVariable (exprNode_getUentry (e2))) | |
5900 | { | |
5901 | /* | |
5902 | ** comparisons with FALSE are okay | |
5903 | */ | |
5904 | ||
5905 | if (exprNode_isFalseConstant (e1) | |
5906 | || exprNode_isFalseConstant (e2)) | |
5907 | { | |
5908 | ; | |
5909 | } | |
5910 | else | |
5911 | { | |
5912 | voptgenerror | |
5913 | (FLG_BOOLCOMPARE, | |
5914 | message | |
5915 | ("Use of %q with %s variables (risks inconsistency because " | |
5916 | "of multiple true values): %s", | |
5917 | cstring_makeLiteral ((opid == EQ_OP) ? "==" : "!="), | |
5918 | context_printBoolName (), exprNode_unparse (ret)), | |
5919 | e1->loc); | |
5920 | } | |
5921 | } | |
5922 | } | |
5923 | break; | |
5924 | ||
5925 | case AND_OP: /* bool, bool -> bool */ | |
5926 | case OR_OP: | |
5927 | if (ctype_isForceRealBool (&tr1) && ctype_isForceRealBool (&tr2)) | |
5928 | { | |
5929 | ; | |
5930 | } | |
5931 | else | |
5932 | { | |
5933 | if (context_maybeSet (FLG_BOOLOPS)) | |
5934 | { | |
5935 | if (!ctype_isRealBool (te1) && !ctype_isRealBool (te2)) | |
5936 | { | |
5937 | if (ctype_sameName (te1, te2)) | |
5938 | { | |
5939 | voptgenerror | |
5940 | (FLG_BOOLOPS, | |
5941 | message ("Operands of %s are non-boolean (%t): %s", | |
5942 | lltok_unparse (op), te1, | |
5943 | exprNode_unparse (ret)), | |
5944 | e1->loc); | |
5945 | } | |
5946 | else | |
5947 | { | |
5948 | voptgenerror | |
5949 | (FLG_BOOLOPS, | |
5950 | message | |
5951 | ("Operands of %s are non-booleans (%t, %t): %s", | |
5952 | lltok_unparse (op), te1, te2, exprNode_unparse (ret)), | |
5953 | e1->loc); | |
5954 | } | |
5955 | } | |
5956 | else if (!ctype_isRealBool (te1)) | |
5957 | { | |
5958 | voptgenerror | |
5959 | (FLG_BOOLOPS, | |
5960 | message ("Left operand of %s is non-boolean (%t): %s", | |
5961 | lltok_unparse (op), te1, exprNode_unparse (ret)), | |
5962 | e1->loc); | |
5963 | } | |
5964 | else if (!ctype_isRealBool (te2)) | |
5965 | { | |
5966 | voptgenerror | |
5967 | (FLG_BOOLOPS, | |
5968 | message ("Right operand of %s is non-boolean (%t): %s", | |
5969 | lltok_unparse (op), te2, exprNode_unparse (ret)), | |
5970 | e2->loc); | |
5971 | } | |
5972 | else | |
5973 | { | |
5974 | ; | |
5975 | } | |
5976 | } | |
5977 | tret = ctype_bool; | |
5978 | } | |
5979 | break; | |
5980 | default: | |
5981 | llfatalbug | |
5982 | (cstring_makeLiteral | |
5983 | ("There has been a problem in the parser. This is believed to result " | |
5984 | "from a problem with bison v. 1.25. Please try rebuidling Splint " | |
5985 | "using the pre-compiled grammar files by commenting out the " | |
5986 | "BISON= line in the top-level Makefile.")); | |
5987 | } | |
5988 | ||
5989 | skiprest: | |
5990 | ret->typ = tret; | |
5991 | DPRINTF (("Return type %s: %s", exprNode_unparse (ret), ctype_unparse (tret))); | |
5992 | ||
5993 | exprNode_checkUse (ret, e1->sref, e1->loc); | |
5994 | exprNode_mergeUSs (ret, e2); | |
5995 | exprNode_checkUse (ret, e2->sref, e2->loc); | |
5996 | ||
5997 | return ret; | |
5998 | } | |
5999 | ||
6000 | /*@only@*/ exprNode | |
6001 | exprNode_op (/*@only@*/ exprNode e1, /*@keep@*/ exprNode e2, | |
6002 | /*@only@*/ lltok op) | |
6003 | { | |
6004 | exprNode ret; | |
6005 | ||
6006 | checkMacroParen (e1); | |
6007 | checkMacroParen (e2); | |
6008 | ||
6009 | if (evaluationOrderUndefined (op) && context_maybeSet (FLG_EVALORDER)) | |
6010 | { | |
6011 | checkExpressionDefined (e1, e2, op); | |
6012 | } | |
6013 | ||
6014 | ret = exprNode_makeOp (e1, e2, op); | |
6015 | return (ret); | |
6016 | } | |
6017 | ||
6018 | static | |
6019 | void exprNode_checkAssignMod (exprNode e1, exprNode ret) | |
6020 | { | |
6021 | /* | |
6022 | ** This is somewhat bogus! | |
6023 | ** | |
6024 | ** Assigning to a nested observer in a non-observer datatype | |
6025 | ** should not produce an error. | |
6026 | */ | |
6027 | ||
6028 | sRef ref = exprNode_getSref (e1); | |
6029 | ||
6030 | DPRINTF (("Check assign mod: %s", | |
6031 | sRef_unparseFull (ref))); | |
6032 | ||
6033 | if (sRef_isObserver (ref) | |
6034 | || ((sRef_isFileStatic (ref) || sRef_isFileOrGlobalScope (ref)) | |
6035 | && ctype_isArray (ctype_realType (sRef_getType (ref))))) | |
6036 | { | |
6037 | sRef base = sRef_getBase (ref); | |
6038 | ||
6039 | if (sRef_isValid (base) && sRef_isObserver (base)) | |
6040 | { | |
6041 | exprNode_checkModify (e1, ret); | |
6042 | } | |
6043 | else | |
6044 | { | |
6045 | exprNode_checkModifyVal (e1, ret); | |
6046 | } | |
6047 | } | |
6048 | else | |
6049 | { | |
6050 | exprNode_checkModify (e1, ret); | |
6051 | } | |
6052 | } | |
6053 | ||
6054 | exprNode | |
6055 | exprNode_assign (/*@only@*/ exprNode e1, /*@only@*/ exprNode e2, /*@only@*/ lltok op) | |
6056 | { | |
6057 | bool isalloc = FALSE; | |
6058 | bool isjustalloc = FALSE; | |
6059 | bool noalias = FALSE; | |
6060 | exprNode ret; | |
6061 | ||
6062 | DPRINTF (("%s [%s] <- %s [%s]", | |
6063 | exprNode_unparse (e1), | |
6064 | ctype_unparse (e1->typ), | |
6065 | exprNode_unparse (e2), | |
6066 | ctype_unparse (e2->typ))); | |
6067 | ||
6068 | if (lltok_getTok (op) != TASSIGN) | |
6069 | { | |
6070 | ret = exprNode_makeOp (e1, e2, op); | |
6071 | ||
6072 | DPRINTF (("Here goes: %s %s", | |
6073 | ctype_unparse (e1->typ), | |
6074 | ctype_unparse (e2->typ))); | |
6075 | ||
6076 | if (exprNode_isDefined (e1) | |
6077 | && exprNode_isDefined (e2)) | |
6078 | { | |
6079 | if (ctype_isNumeric (e2->typ) | |
6080 | || ctype_isNumeric (e1->typ)) | |
6081 | { | |
6082 | /* Its a pointer arithmetic expression like ptr += i */ | |
6083 | noalias = TRUE; | |
6084 | } | |
6085 | } | |
6086 | } | |
6087 | else | |
6088 | { | |
6089 | ret = exprNode_createPartialCopy (e1); | |
6090 | ret->kind = XPR_ASSIGN; | |
6091 | ret->edata = exprData_makeOp (e1, e2, op); | |
6092 | ||
6093 | if (!exprNode_isError (e2)) | |
6094 | { | |
6095 | ret->sets = sRefSet_union (ret->sets, e2->sets); | |
6096 | ret->msets = sRefSet_union (ret->msets, e2->msets); | |
6097 | ret->uses = sRefSet_union (ret->uses, e2->uses); | |
6098 | } | |
6099 | } | |
6100 | ||
6101 | checkExpressionDefined (e1, e2, op); | |
6102 | ||
6103 | if (exprNode_isError (e1)) | |
6104 | { | |
6105 | if (!exprNode_isError (e2)) | |
6106 | { | |
6107 | ret->loc = fileloc_update (ret->loc, e2->loc); | |
6108 | } | |
6109 | else | |
6110 | { | |
6111 | ret->loc = fileloc_update (ret->loc, g_currentloc); | |
6112 | } | |
6113 | } | |
6114 | ||
6115 | if (!exprNode_isError (e2)) | |
6116 | { | |
6117 | checkMacroParen (e2); | |
6118 | } | |
6119 | ||
6120 | if (exprNode_isDefined (e1)) | |
6121 | { | |
6122 | if (sRef_isMacroParamRef (e1->sref)) | |
6123 | { | |
6124 | if (context_inIterDef ()) | |
6125 | { | |
6126 | uentry ue = sRef_getUentry (e1->sref); | |
6127 | ||
6128 | if (uentry_isYield (ue)) | |
6129 | { | |
6130 | ; | |
6131 | } | |
6132 | else | |
6133 | { | |
6134 | if (fileloc_isDefined (e1->loc)) | |
6135 | { | |
6136 | voptgenerror | |
6137 | (FLG_MACROPARAMS, | |
6138 | message ("Assignment to non-yield iter parameter: %q", | |
6139 | sRef_unparse (e1->sref)), | |
6140 | e1->loc); | |
6141 | } | |
6142 | else | |
6143 | { | |
6144 | voptgenerror | |
6145 | (FLG_MACROPARAMS, | |
6146 | message ("Assignment to non-yield iter parameter: %q", | |
6147 | sRef_unparse (e1->sref)), | |
6148 | g_currentloc); | |
6149 | } | |
6150 | } | |
6151 | } | |
6152 | else | |
6153 | { | |
6154 | if (fileloc_isDefined (e1->loc)) | |
6155 | { | |
6156 | voptgenerror | |
6157 | (FLG_MACROASSIGN, | |
6158 | message ("Assignment to macro parameter: %q", | |
6159 | sRef_unparse (e1->sref)), | |
6160 | e1->loc); | |
6161 | } | |
6162 | else | |
6163 | { | |
6164 | voptgenerror | |
6165 | (FLG_MACROASSIGN, | |
6166 | message ("Assignment to macro parameter: %q", | |
6167 | sRef_unparse (e1->sref)), | |
6168 | g_currentloc); | |
6169 | } | |
6170 | ||
6171 | exprNode_checkAssignMod (e1, ret); /* evans 2001-07-22 */ | |
6172 | } | |
6173 | } | |
6174 | else | |
6175 | { | |
6176 | exprNode_checkAssignMod (e1, ret); | |
6177 | } | |
6178 | ||
6179 | if (exprNode_isDefined (e2)) | |
6180 | { | |
6181 | if (lltok_getTok (op) == TASSIGN) | |
6182 | { | |
6183 | ctype te1 = exprNode_getType (e1); | |
6184 | ctype te2 = exprNode_getType (e2); | |
6185 | ||
6186 | if (ctype_isVoid (te2)) | |
6187 | { | |
6188 | (void) gentypeerror | |
6189 | (te2, e2, te1, e1, | |
6190 | message ("Assignment of void value to %t: %s %s %s", | |
6191 | te1, exprNode_unparse (e1), | |
6192 | lltok_unparse (op), | |
6193 | exprNode_unparse (e2)), | |
6194 | e1->loc); | |
6195 | } | |
6196 | else if (!ctype_forceMatch (te1, te2)) | |
6197 | { | |
6198 | if (exprNode_matchLiteral (te1, e2)) | |
6199 | { | |
6200 | DPRINTF (("Literals match: %s / %s", | |
6201 | ctype_unparse (te1), exprNode_unparse (e2))); | |
6202 | if (ctype_isNumAbstract (te1)) { | |
6203 | if (!context_flagOn (FLG_NUMABSTRACTLIT, e1->loc)) { | |
6204 | (void) llgenhinterror | |
6205 | (FLG_NUMABSTRACT, | |
6206 | message | |
6207 | ("Assignment of %t literal to numabstract type %t: %s %s %s", | |
6208 | te2, te1, | |
6209 | exprNode_unparse (e1), | |
6210 | lltok_unparse (op), | |
6211 | exprNode_unparse (e2)), | |
6212 | cstring_makeLiteral | |
6213 | ("Use +numabstractlit to allow numeric literals to be used as numabstract values"), | |
6214 | e1->loc); | |
6215 | } | |
6216 | } | |
6217 | } | |
6218 | else | |
6219 | { | |
6220 | (void) gentypeerror | |
6221 | (te2, e2, te1, e1, | |
6222 | message ("Assignment of %t to %t: %s %s %s", | |
6223 | te2, te1, exprNode_unparse (e1), | |
6224 | lltok_unparse (op), | |
6225 | exprNode_unparse (e2)), | |
6226 | e1->loc); | |
6227 | } | |
6228 | } | |
6229 | else | |
6230 | { | |
6231 | /* Type checks okay */ | |
6232 | } | |
6233 | } | |
6234 | ||
6235 | exprNode_mergeUSs (ret, e2); | |
6236 | exprNode_checkUse (ret, e2->sref, e2->loc); | |
6237 | ||
6238 | DPRINTF (("Do assign! %s %s", exprNode_unparse (e1), exprNode_unparse (e2))); | |
6239 | if (noalias) | |
6240 | { | |
6241 | ; | |
6242 | } | |
6243 | else | |
6244 | { | |
6245 | doAssign (e1, e2, FALSE); | |
6246 | } | |
6247 | ||
6248 | ret->sref = e1->sref; | |
6249 | } | |
6250 | else | |
6251 | { | |
6252 | if (exprNode_isDefined (e2)) | |
6253 | { | |
6254 | exprNode_mergeUSs (ret, e2); | |
6255 | exprNode_checkUse (ret, e2->sref, e2->loc); | |
6256 | } | |
6257 | } | |
6258 | ||
6259 | if (sRef_isPointer (e1->sref) && !sRef_isMacroParamRef (e1->sref)) | |
6260 | { | |
6261 | exprNode_checkUse (ret, sRef_getBase (e1->sref), e1->loc); | |
6262 | } | |
6263 | ||
6264 | isjustalloc = sRef_isJustAllocated (e1->sref); | |
6265 | isalloc = sRef_isAllocated (e1->sref); | |
6266 | ||
6267 | if (sRef_isField (e1->sref)) | |
6268 | { | |
6269 | sRef root = sRef_getRootBase (sRef_getBase (e1->sref)); | |
6270 | ||
6271 | if (!sRef_isAllocated (root) && !sRef_isMacroParamRef (root)) | |
6272 | { | |
6273 | exprNode_checkUse (ret, root, e1->loc); | |
6274 | } | |
6275 | ||
6276 | } | |
6277 | ||
6278 | /* | |
6279 | ** be careful! this defines e1->sref. | |
6280 | */ | |
6281 | ||
6282 | /* evans 2001-07-22: removed if (!sRef_isMacroParamRef (e1->sref)) */ | |
6283 | ||
6284 | DPRINTF (("Setting: %s -> %s", exprNode_unparse (ret), sRef_unparse (e1->sref))); | |
6285 | exprNode_checkSet (ret, e1->sref); | |
6286 | ||
6287 | if (isjustalloc) | |
6288 | { | |
6289 | sRef_setAllocatedComplete (e1->sref, exprNode_isDefined (e2) | |
6290 | ? e2->loc : e1->loc); | |
6291 | } | |
6292 | else | |
6293 | { | |
6294 | if (isalloc) | |
6295 | { | |
6296 | sRef_setAllocatedShallowComplete (e1->sref, exprNode_loc (e2)); | |
6297 | } | |
6298 | } | |
6299 | } | |
6300 | ||
6301 | return ret; | |
6302 | } | |
6303 | ||
6304 | exprNode | |
6305 | exprNode_cond (/*@keep@*/ exprNode pred, /*@keep@*/ exprNode ifclause, | |
6306 | /*@keep@*/ exprNode elseclause) | |
6307 | { | |
6308 | exprNode ret; | |
6309 | ||
6310 | if (!exprNode_isError (pred)) | |
6311 | { | |
6312 | ret = exprNode_createPartialCopy (pred); | |
6313 | checkMacroParen (pred); | |
6314 | exprNode_checkPred (cstring_makeLiteralTemp ("conditional"), pred); | |
6315 | ||
6316 | if (!exprNode_isError (ifclause)) | |
6317 | { | |
6318 | checkMacroParen (ifclause); /* update macro counts! */ | |
6319 | ||
6320 | if (!exprNode_isError (elseclause)) | |
6321 | { | |
6322 | checkMacroParen (elseclause); | |
6323 | ||
6324 | if (!exprNode_matchTypes (ifclause, elseclause)) | |
6325 | { | |
6326 | if (gentypeerror | |
6327 | (exprNode_getType (ifclause), | |
6328 | ifclause, | |
6329 | exprNode_getType (elseclause), | |
6330 | elseclause, | |
6331 | message ("Conditional clauses are not of same type: " | |
6332 | "%s (%t), %s (%t)", | |
6333 | exprNode_unparse (ifclause), | |
6334 | exprNode_getType (ifclause), | |
6335 | exprNode_unparse (elseclause), | |
6336 | exprNode_getType (elseclause)), | |
6337 | ifclause->loc)) | |
6338 | { | |
6339 | ret->sref = sRef_undefined; | |
6340 | ret->typ = ctype_unknown; | |
6341 | } | |
6342 | } | |
6343 | else | |
6344 | { | |
6345 | /* for now...should merge the states */ | |
6346 | ret->sref = ifclause->sref; | |
6347 | ret->typ = ifclause->typ; | |
6348 | ||
6349 | if (exprNode_isNullValue (ifclause)) | |
6350 | { | |
6351 | ret->typ = elseclause->typ; | |
6352 | } | |
6353 | } | |
6354 | ||
6355 | exprNode_checkUse (ret, pred->sref, pred->loc); | |
6356 | exprNode_checkUse (ifclause, ifclause->sref, ifclause->loc); | |
6357 | exprNode_checkUse (elseclause, elseclause->sref, elseclause->loc); | |
6358 | ||
6359 | exprNode_mergeCondUSs (ret, ifclause, elseclause); | |
6360 | ||
6361 | } | |
6362 | else | |
6363 | { | |
6364 | ret->typ = ifclause->typ; | |
6365 | ||
6366 | exprNode_checkUse (pred, pred->sref, pred->loc); | |
6367 | exprNode_checkUse (ifclause, ifclause->sref, ifclause->loc); | |
6368 | ||
6369 | exprNode_mergeCondUSs (ret, ifclause, exprNode_undefined); | |
6370 | } | |
6371 | } | |
6372 | else | |
6373 | { | |
6374 | if (!exprNode_isError (elseclause)) | |
6375 | { | |
6376 | ret->typ = elseclause->typ; | |
6377 | ||
6378 | exprNode_checkUse (pred, pred->sref, pred->loc); | |
6379 | exprNode_checkUse (elseclause, elseclause->sref, elseclause->loc); | |
6380 | ||
6381 | exprNode_mergeCondUSs (ret, exprNode_undefined, elseclause); | |
6382 | } | |
6383 | } | |
6384 | } | |
6385 | else /* pred is error */ | |
6386 | { | |
6387 | if (!exprNode_isError (ifclause)) | |
6388 | { | |
6389 | ret = exprNode_createSemiCopy (ifclause); | |
6390 | ||
6391 | checkMacroParen (ifclause); /* update macro counts! */ | |
6392 | ||
6393 | if (!exprNode_isError (elseclause)) | |
6394 | { | |
6395 | checkMacroParen (elseclause); | |
6396 | ||
6397 | ret->typ = ifclause->typ; | |
6398 | ||
6399 | if (!ctype_forceMatch (ifclause->typ, elseclause->typ)) | |
6400 | { | |
6401 | if (gentypeerror | |
6402 | (exprNode_getType (ifclause), | |
6403 | ifclause, | |
6404 | exprNode_getType (elseclause), | |
6405 | elseclause, | |
6406 | message ("Conditional clauses are not of same type: " | |
6407 | "%s (%t), %s (%t)", | |
6408 | exprNode_unparse (ifclause), | |
6409 | exprNode_getType (ifclause), | |
6410 | exprNode_unparse (elseclause), | |
6411 | exprNode_getType (elseclause)), | |
6412 | ifclause->loc)) | |
6413 | { | |
6414 | ret->typ = ctype_unknown; | |
6415 | } | |
6416 | } | |
6417 | ||
6418 | exprNode_checkUse (ifclause, ifclause->sref, ifclause->loc); | |
6419 | exprNode_checkUse (elseclause, elseclause->sref, elseclause->loc); | |
6420 | ||
6421 | exprNode_mergeCondUSs (ret, ifclause, elseclause); | |
6422 | } | |
6423 | } | |
6424 | else if (!exprNode_isError (elseclause)) /* pred, if errors */ | |
6425 | { | |
6426 | ret = exprNode_createSemiCopy (ifclause); | |
6427 | ||
6428 | ret->typ = elseclause->typ; | |
6429 | checkMacroParen (elseclause); | |
6430 | ||
6431 | exprNode_checkUse (elseclause, elseclause->sref, elseclause->loc); | |
6432 | exprNode_mergeCondUSs (ret, exprNode_undefined, elseclause); | |
6433 | } | |
6434 | else /* all errors! */ | |
6435 | { | |
6436 | ret = exprNode_createLoc (ctype_unknown, fileloc_copy (g_currentloc)); | |
6437 | } | |
6438 | } | |
6439 | ||
6440 | ret->kind = XPR_COND; | |
6441 | ret->edata = exprData_makeCond (pred, ifclause, elseclause); | |
6442 | ||
6443 | if (exprNode_isDefined (ifclause) && exprNode_isDefined (elseclause)) | |
6444 | { | |
6445 | exprNode_combineControl (ret, ifclause, elseclause); | |
6446 | } | |
6447 | ||
6448 | return (ret); | |
6449 | } | |
6450 | ||
6451 | exprNode | |
6452 | exprNode_vaArg (/*@only@*/ lltok tok, /*@only@*/ exprNode arg, /*@only@*/ qtype qt) | |
6453 | { | |
6454 | ctype totype = qtype_getType (qt); | |
6455 | exprNode ret = | |
6456 | exprNode_createPartialLocCopy (arg, fileloc_copy (lltok_getLoc (tok))); | |
6457 | ctype targ; | |
6458 | ||
6459 | /* | |
6460 | ** check use of va_arg : <valist>, type -> type | |
6461 | */ | |
6462 | ||
6463 | if (exprNode_isError (arg)) | |
6464 | { | |
6465 | } | |
6466 | else | |
6467 | { | |
6468 | targ = exprNode_getType (arg); | |
6469 | ||
6470 | /* | |
6471 | ** arg should have be a pointer | |
6472 | */ | |
6473 | ||
6474 | if (!ctype_isUA (targ) || | |
6475 | (!typeId_equal (ctype_typeId (targ), | |
6476 | usymtab_getTypeId (cstring_makeLiteralTemp ("va_list"))))) | |
6477 | { | |
6478 | voptgenerror | |
6479 | (FLG_TYPE, | |
6480 | message ("First argument to va_arg is not a va_list (type %t): %s", | |
6481 | targ, exprNode_unparse (arg)), | |
6482 | arg->loc); | |
6483 | } | |
6484 | ||
6485 | exprNode_checkSet (ret, arg->sref); | |
6486 | } | |
6487 | ||
6488 | /* | |
6489 | ** return type is totype | |
6490 | */ | |
6491 | ||
6492 | ret->typ = totype; | |
6493 | ret->kind = XPR_VAARG; | |
6494 | ret->edata = exprData_makeCast (tok, arg, qt); | |
6495 | ||
6496 | return (ret); | |
6497 | } | |
6498 | ||
6499 | exprNode exprNode_labelMarker (/*@only@*/ cstring label) | |
6500 | { | |
6501 | exprNode ret = exprNode_createPlain (ctype_undefined); | |
6502 | ret->kind = XPR_LABEL; | |
6503 | ret->edata = exprData_makeLiteral (label); | |
6504 | ret->isJumpPoint = TRUE; | |
6505 | ||
6506 | return (ret); /* for now, ignore label */ | |
6507 | } | |
6508 | ||
6509 | exprNode exprNode_notReached (/*@returned@*/ exprNode stmt) | |
6510 | { | |
6511 | if (exprNode_isDefined (stmt)) | |
6512 | { | |
6513 | stmt->isJumpPoint = TRUE; | |
6514 | ||
6515 | /* This prevent stray no return path errors, etc. */ | |
6516 | stmt->exitCode = XK_MUSTEXIT; | |
6517 | } | |
6518 | ||
6519 | return (stmt); | |
6520 | } | |
6521 | ||
6522 | bool exprNode_isDefaultMarker (exprNode e) | |
6523 | { | |
6524 | if (exprNode_isDefined (e)) | |
6525 | { | |
6526 | return (e->kind == XPR_DEFAULT || e->kind == XPR_FTDEFAULT); | |
6527 | } | |
6528 | ||
6529 | return FALSE; | |
6530 | } | |
6531 | ||
6532 | bool exprNode_isCaseMarker (exprNode e) | |
6533 | { | |
6534 | if (exprNode_isDefined (e)) | |
6535 | { | |
6536 | return (e->kind == XPR_FTCASE || e->kind == XPR_CASE); | |
6537 | } | |
6538 | ||
6539 | return FALSE; | |
6540 | } | |
6541 | ||
6542 | bool exprNode_isLabelMarker (exprNode e) | |
6543 | { | |
6544 | if (exprNode_isDefined (e)) | |
6545 | { | |
6546 | return (e->kind == XPR_LABEL); | |
6547 | } | |
6548 | ||
6549 | return FALSE; | |
6550 | } | |
6551 | ||
6552 | exprNode exprNode_caseMarker (/*@only@*/ exprNode test, bool fallThrough) | |
6553 | { | |
6554 | exprNode ret = exprNode_createPartialCopy (test); | |
6555 | ||
6556 | ret->kind = fallThrough ? XPR_FTCASE : XPR_CASE; | |
6557 | ||
6558 | if (exprNode_isError (test)) { | |
6559 | return ret; | |
6560 | } | |
6561 | ||
6562 | exprNode_checkUse (ret, test->sref, test->loc); | |
6563 | ||
6564 | usymtab_setExitCode (ret->exitCode); | |
6565 | ||
6566 | if (ret->mustBreak) | |
6567 | { | |
6568 | usymtab_setMustBreak (); | |
6569 | } | |
6570 | ||
6571 | ret->edata = exprData_makeSingle (test); | |
6572 | ret->isJumpPoint = TRUE; | |
6573 | ||
6574 | return ret; | |
6575 | } | |
6576 | ||
6577 | # if 0 | |
6578 | exprNode exprNode_caseStatement (/*@only@*/ exprNode test, /*@only@*/ exprNode stmt, bool fallThrough) | |
6579 | { | |
6580 | exprNode ret = exprNode_createPartialCopy (test); | |
6581 | ||
6582 | ret->kind = fallThrough ? XPR_FTCASE : XPR_CASE; | |
6583 | ret->edata = exprData_makePair (test, stmt); | |
6584 | ret->isJumpPoint = TRUE; | |
6585 | ||
6586 | if (exprNode_isError (test)) | |
6587 | { | |
6588 | return ret; | |
6589 | } | |
6590 | ||
6591 | exprNode_checkUse (ret, test->sref, test->loc); | |
6592 | ||
6593 | if (exprNode_isError (stmt)) | |
6594 | { | |
6595 | return ret; | |
6596 | } | |
6597 | ||
6598 | exprNode_mergeUSs (ret, stmt); | |
6599 | ||
6600 | ret->exitCode = stmt->exitCode; | |
6601 | ret->mustBreak = stmt->mustBreak; | |
6602 | ret->canBreak = stmt->canBreak; | |
6603 | ||
6604 | usymtab_setExitCode (ret->exitCode); | |
6605 | ||
6606 | if (ret->mustBreak) | |
6607 | { | |
6608 | usymtab_setMustBreak (); | |
6609 | } | |
6610 | ||
6611 | return ret; | |
6612 | } | |
6613 | # endif | |
6614 | ||
6615 | /*@notnull@*/ /*@only@*/ exprNode | |
6616 | exprNode_defaultMarker (/*@only@*/ lltok def, bool fallThrough) | |
6617 | { | |
6618 | exprNode ret = exprNode_createTok (def); | |
6619 | ||
6620 | ret->isJumpPoint = TRUE; | |
6621 | ret->kind = fallThrough ? XPR_FTDEFAULT : XPR_DEFAULT; | |
6622 | return (ret); | |
6623 | } | |
6624 | ||
6625 | bool | |
6626 | exprNode_mayEscape (exprNode e) | |
6627 | { | |
6628 | if (exprNode_isDefined (e)) | |
6629 | { | |
6630 | return exitkind_couldEscape (e->exitCode); | |
6631 | } | |
6632 | return FALSE; | |
6633 | } | |
6634 | ||
6635 | static bool | |
6636 | exprNode_mustBreak (exprNode e) | |
6637 | { | |
6638 | if (exprNode_isDefined (e)) | |
6639 | { | |
6640 | return e->mustBreak; | |
6641 | } | |
6642 | ||
6643 | return FALSE; | |
6644 | } | |
6645 | ||
6646 | bool | |
6647 | exprNode_mustEscape (exprNode e) | |
6648 | { | |
6649 | if (exprNode_isDefined (e)) | |
6650 | { | |
6651 | return exitkind_mustEscape (e->exitCode) || exprNode_mustBreak (e); | |
6652 | } | |
6653 | ||
6654 | return FALSE; | |
6655 | } | |
6656 | ||
6657 | bool | |
6658 | exprNode_errorEscape (exprNode e) | |
6659 | { | |
6660 | if (exprNode_isDefined (e)) | |
6661 | { | |
6662 | return exitkind_isError (e->exitCode); | |
6663 | } | |
6664 | ||
6665 | return FALSE; | |
6666 | } | |
6667 | ||
6668 | exprNode exprNode_concat (/*@only@*/ exprNode e1, /*@only@*/ exprNode e2) | |
6669 | { | |
6670 | exprNode ret = exprNode_createPartialCopy (e1); | |
6671 | ||
6672 | DPRINTF (("Concat: %s / %s", exprNode_unparse (e1), exprNode_unparse (e2))); | |
6673 | ||
6674 | ret->edata = exprData_makePair (e1, e2); | |
6675 | ret->kind = XPR_STMTLIST; | |
6676 | ||
6677 | if (exprNode_isDefined (e1)) | |
6678 | { | |
6679 | ret->isJumpPoint = e1->isJumpPoint; | |
6680 | ret->canBreak = e1->canBreak; | |
6681 | } | |
6682 | else | |
6683 | { | |
6684 | if (exprNode_isDefined (e2)) | |
6685 | { | |
6686 | ret->loc = fileloc_update (ret->loc, e2->loc); | |
6687 | } | |
6688 | } | |
6689 | ||
6690 | if (exprNode_isDefined (e2)) | |
6691 | { | |
6692 | ret->exitCode = e2->exitCode; | |
6693 | ret->mustBreak = e2->mustBreak; | |
6694 | if (e2->canBreak) ret->canBreak = TRUE; | |
6695 | } | |
6696 | ||
6697 | /* | |
6698 | ** if e1 must return, then e2 is unreachable! | |
6699 | */ | |
6700 | ||
6701 | if (exprNode_isDefined (e1) && exprNode_isDefined (e2)) | |
6702 | { | |
6703 | if ((exprNode_mustEscape (e1) || exprNode_mustBreak (e1)) | |
6704 | && !(e2->isJumpPoint)) | |
6705 | { | |
6706 | if (context_getFlag (FLG_UNREACHABLE)) | |
6707 | { | |
6708 | exprNode nr = e2; | |
6709 | ||
6710 | if (e2->kind == XPR_STMT) | |
6711 | { | |
6712 | nr = exprData_getUopNode (e2->edata); | |
6713 | } | |
6714 | ||
6715 | if ((nr->kind == XPR_TOK | |
6716 | && lltok_isSemi (exprData_getTok (nr->edata)))) | |
6717 | { | |
6718 | /* okay to have unreachable ";" */ | |
6719 | ret->exitCode = XK_MUSTEXIT; | |
6720 | ret->canBreak = TRUE; | |
6721 | } | |
6722 | else | |
6723 | { | |
6724 | if (optgenerror (FLG_UNREACHABLE, | |
6725 | message ("Unreachable code: %s", | |
6726 | exprNode_unparseFirst (nr)), | |
6727 | exprNode_loc (nr))) | |
6728 | { | |
6729 | ret->isJumpPoint = TRUE; | |
6730 | ret->mustBreak = FALSE; | |
6731 | ret->exitCode = XK_ERROR; | |
6732 | DPRINTF (("Jump point: %s", exprNode_unparse (ret))); | |
6733 | } | |
6734 | else | |
6735 | { | |
6736 | ret->exitCode = XK_MUSTEXIT; | |
6737 | ret->canBreak = TRUE; | |
6738 | } | |
6739 | ||
6740 | } | |
6741 | } | |
6742 | } | |
6743 | else | |
6744 | { | |
6745 | if ((e2->kind == XPR_CASE || e2->kind == XPR_DEFAULT)) | |
6746 | { | |
6747 | /* | |
6748 | ** We want a warning anytime we have: | |
6749 | ** case xxx: ... | |
6750 | ** yyy; <<<- no break or return | |
6751 | ** case zzz: ... | |
6752 | */ | |
6753 | ||
6754 | exprNode lastStmt = exprNode_lastStatement (e1); | |
6755 | ||
6756 | if (exprNode_isDefined (lastStmt) | |
6757 | && !exprNode_mustEscape (lastStmt) | |
6758 | && !exprNode_mustBreak (lastStmt) | |
6759 | && !exprNode_isCaseMarker (lastStmt) | |
6760 | && !exprNode_isDefaultMarker (lastStmt) | |
6761 | && !exprNode_isLabelMarker (lastStmt)) | |
6762 | { | |
6763 | voptgenerror (FLG_CASEBREAK, | |
6764 | cstring_makeLiteral | |
6765 | ("Fall through case (no preceding break)"), | |
6766 | e2->loc); | |
6767 | } | |
6768 | } | |
6769 | } | |
6770 | } | |
6771 | ||
6772 | exprNode_mergeUSs (ret, e2); | |
6773 | ||
6774 | usymtab_setExitCode (ret->exitCode); | |
6775 | ||
6776 | if (ret->mustBreak) | |
6777 | { | |
6778 | usymtab_setMustBreak (); | |
6779 | } | |
6780 | ||
6781 | DPRINTF (("==> %s", exprNode_unparse (ret))); | |
6782 | return ret; | |
6783 | } | |
6784 | ||
6785 | exprNode exprNode_createTok (/*@only@*/ lltok t) | |
6786 | { | |
6787 | exprNode ret = exprNode_create (ctype_unknown); | |
6788 | ret->kind = XPR_TOK; | |
6789 | ret->edata = exprData_makeTok (t); | |
6790 | return ret; | |
6791 | } | |
6792 | ||
6793 | exprNode exprNode_statement (/*@only@*/ exprNode e, /*@only@*/ lltok t) | |
6794 | { | |
6795 | if (!exprNode_isError (e)) | |
6796 | { | |
6797 | exprChecks_checkStatementEffect(e); | |
6798 | } | |
6799 | ||
6800 | return (exprNode_statementError (e, t)); | |
6801 | } | |
6802 | ||
6803 | static exprNode exprNode_statementError (/*@only@*/ exprNode e, /*@only@*/ lltok t) | |
6804 | { | |
6805 | exprNode ret = exprNode_createPartialCopy (e); | |
6806 | ||
6807 | if (!exprNode_isError (e)) | |
6808 | { | |
6809 | if (e->kind != XPR_ASSIGN) | |
6810 | { | |
6811 | exprNode_checkUse (ret, e->sref, e->loc); | |
6812 | } | |
6813 | ||
6814 | ret->exitCode = e->exitCode; | |
6815 | ret->canBreak = e->canBreak; | |
6816 | ret->mustBreak = e->mustBreak; | |
6817 | } | |
6818 | ||
6819 | ret->edata = exprData_makeUop (e, t); | |
6820 | ret->kind = XPR_STMT; | |
6821 | ||
6822 | return ret; | |
6823 | } | |
6824 | ||
6825 | exprNode exprNode_checkExpr (/*@returned@*/ exprNode e) | |
6826 | { | |
6827 | if (!exprNode_isError (e)) | |
6828 | { | |
6829 | if (e->kind != XPR_ASSIGN) | |
6830 | { | |
6831 | exprNode_checkUse (e, e->sref, e->loc); | |
6832 | } | |
6833 | } | |
6834 | ||
6835 | return e; | |
6836 | } | |
6837 | ||
6838 | void exprNode_produceGuards (exprNode pred) | |
6839 | { | |
6840 | if (!exprNode_isError (pred)) | |
6841 | { | |
6842 | if (ctype_isRealPointer (pred->typ)) | |
6843 | { | |
6844 | pred->guards = guardSet_addTrueGuard (pred->guards, pred->sref); | |
6845 | } | |
6846 | ||
6847 | exprNode_checkUse (pred, pred->sref, pred->loc); | |
6848 | exprNode_resetSref (pred); | |
6849 | } | |
6850 | } | |
6851 | ||
6852 | exprNode exprNode_compoundStatementExpression (/*@only@*/ lltok tlparen, /*@only@*/ exprNode e) | |
6853 | { | |
6854 | exprNode laststmt; | |
6855 | ||
6856 | DPRINTF (("Compound: %s", exprNode_unparse (e))); | |
6857 | ||
6858 | if (!context_flagOn (FLG_GNUEXTENSIONS, exprNode_loc (e))) | |
6859 | { | |
6860 | (void) llgenhinterror | |
6861 | (FLG_SYNTAX, | |
6862 | message ("Compound statement expressions is not supported by ISO C99"), | |
6863 | message ("Use +gnuextensions to allow compound statement expressions (and other GNU language extensions) " | |
6864 | "without this warning"), | |
6865 | exprNode_loc (e)); | |
6866 | } | |
6867 | ||
6868 | /* | |
6869 | ** The type of a compoundStatementExpression is the type of the last statement | |
6870 | */ | |
6871 | ||
6872 | llassert (exprNode_isBlock (e)); | |
6873 | laststmt = exprNode_lastStatement (e); | |
6874 | ||
6875 | DPRINTF (("Last statement: %s / %s", exprNode_unparse (laststmt), ctype_unparse (exprNode_getType (laststmt)))); | |
6876 | DPRINTF (("e: %s", exprNode_unparse (e))); | |
6877 | e->typ = exprNode_getType (laststmt); | |
6878 | return exprNode_addParens (tlparen, e); | |
6879 | } | |
6880 | ||
6881 | ||
6882 | exprNode exprNode_makeBlock (/*@only@*/ exprNode e) | |
6883 | { | |
6884 | exprNode ret = exprNode_createPartialCopy (e); | |
6885 | ||
6886 | if (!exprNode_isError (e)) | |
6887 | { | |
6888 | ret->exitCode = e->exitCode; | |
6889 | ret->canBreak = e->canBreak; | |
6890 | ret->mustBreak = e->mustBreak; | |
6891 | } | |
6892 | ||
6893 | DPRINTF (("Block e: %s", exprNode_unparse (e))); | |
6894 | ret->edata = exprData_makeSingle (e); | |
6895 | ret->kind = XPR_BLOCK; | |
6896 | DPRINTF (("Block: %s", exprNode_unparse (ret))); | |
6897 | return ret; | |
6898 | } | |
6899 | ||
6900 | bool exprNode_isBlock (exprNode e) | |
6901 | { | |
6902 | return (exprNode_isDefined (e) | |
6903 | && ((e)->kind == XPR_BLOCK)); | |
6904 | } | |
6905 | ||
6906 | bool exprNode_isStatement (exprNode e) | |
6907 | { | |
6908 | return (exprNode_isDefined (e) | |
6909 | && ((e)->kind == XPR_STMT)); | |
6910 | } | |
6911 | ||
6912 | bool exprNode_isAssign (exprNode e) | |
6913 | { | |
6914 | if (exprNode_isDefined (e)) | |
6915 | { | |
6916 | return (e->kind == XPR_ASSIGN); | |
6917 | } | |
6918 | ||
6919 | return FALSE; | |
6920 | } | |
6921 | ||
6922 | bool exprNode_isEmptyStatement (exprNode e) | |
6923 | { | |
6924 | return (exprNode_isDefined (e) | |
6925 | && (e->kind == XPR_TOK) | |
6926 | && (lltok_isSemi (exprData_getTok (e->edata)))); | |
6927 | } | |
6928 | ||
6929 | bool exprNode_isMultiStatement (exprNode e) | |
6930 | { | |
6931 | return (exprNode_isDefined (e) | |
6932 | && ((e->kind == XPR_FOR) | |
6933 | || (e->kind == XPR_FORPRED) | |
6934 | || (e->kind == XPR_IF) | |
6935 | || (e->kind == XPR_IFELSE) | |
6936 | || (e->kind == XPR_WHILE) | |
6937 | || (e->kind == XPR_WHILEPRED) | |
6938 | || (e->kind == XPR_DOWHILE) | |
6939 | || (e->kind == XPR_BLOCK) | |
6940 | || (e->kind == XPR_STMT) | |
6941 | || (e->kind == XPR_STMTLIST) | |
6942 | || (e->kind == XPR_SWITCH))); | |
6943 | } | |
6944 | ||
6945 | void exprNode_checkIfPred (exprNode pred) | |
6946 | { | |
6947 | exprNode_checkPred (cstring_makeLiteralTemp ("if"), pred); | |
6948 | } | |
6949 | ||
6950 | exprNode exprNode_if (/*@only@*/ exprNode pred, /*@only@*/ exprNode tclause) | |
6951 | { | |
6952 | exprNode ret; | |
6953 | bool emptyErr = FALSE; | |
6954 | ||
6955 | if (context_maybeSet (FLG_IFEMPTY)) | |
6956 | { | |
6957 | if (exprNode_isEmptyStatement (tclause)) | |
6958 | { | |
6959 | emptyErr = optgenerror (FLG_IFEMPTY, | |
6960 | cstring_makeLiteral | |
6961 | ("Body of if statement is empty"), | |
6962 | exprNode_loc (tclause)); | |
6963 | } | |
6964 | } | |
6965 | ||
6966 | if (!emptyErr && context_maybeSet (FLG_IFBLOCK)) | |
6967 | { | |
6968 | if (exprNode_isDefined (tclause) | |
6969 | && !exprNode_isBlock (tclause)) | |
6970 | { | |
6971 | voptgenerror (FLG_IFBLOCK, | |
6972 | message | |
6973 | ("Body of if statement is not a block: %s", | |
6974 | exprNode_unparse (tclause)), | |
6975 | exprNode_loc (tclause)); | |
6976 | } | |
6977 | } | |
6978 | ||
6979 | if (exprNode_isError (pred)) | |
6980 | { | |
6981 | if (exprNode_isError (tclause)) | |
6982 | { | |
6983 | ret = exprNode_createLoc (ctype_unknown, fileloc_copy (g_currentloc)); | |
6984 | } | |
6985 | else | |
6986 | { | |
6987 | ret = exprNode_createPartialCopy (tclause); | |
6988 | } | |
6989 | } | |
6990 | else | |
6991 | { | |
6992 | if (exprNode_mustEscape (pred)) | |
6993 | { | |
6994 | voptgenerror | |
6995 | (FLG_UNREACHABLE, | |
6996 | message ("Predicate always exits: %s", exprNode_unparse (pred)), | |
6997 | exprNode_loc (pred)); | |
6998 | } | |
6999 | ||
7000 | exprNode_checkUse (pred, pred->sref, pred->loc); | |
7001 | ||
7002 | if (!exprNode_isError (tclause)) | |
7003 | { | |
7004 | exprNode_mergeCondUSs (pred, tclause, exprNode_undefined); | |
7005 | } | |
7006 | ||
7007 | ret = exprNode_createPartialCopy (pred); | |
7008 | } | |
7009 | ||
7010 | ret->kind = XPR_IF; | |
7011 | ret->edata = exprData_makePair (pred, tclause); | |
7012 | ||
7013 | ret->exitCode = XK_UNKNOWN; | |
7014 | ||
7015 | if (exprNode_isDefined (tclause)) | |
7016 | { | |
7017 | ret->exitCode = exitkind_makeConditional (tclause->exitCode); | |
7018 | ret->canBreak = tclause->canBreak; | |
7019 | ret->sets = sRefSet_union (ret->sets, tclause->sets); | |
7020 | ret->msets = sRefSet_union (ret->msets, tclause->msets); | |
7021 | ret->uses = sRefSet_union (ret->uses, tclause->uses); | |
7022 | } | |
7023 | ||
7024 | ret->mustBreak = FALSE; | |
7025 | ||
7026 | return ret; | |
7027 | } | |
7028 | ||
7029 | exprNode exprNode_ifelse (/*@only@*/ exprNode pred, | |
7030 | /*@only@*/ exprNode tclause, | |
7031 | /*@only@*/ exprNode eclause) | |
7032 | { | |
7033 | exprNode ret; | |
7034 | bool tEmptyErr = FALSE; | |
7035 | bool eEmptyErr = FALSE; | |
7036 | ||
7037 | if (context_maybeSet (FLG_IFEMPTY)) | |
7038 | { | |
7039 | if (exprNode_isEmptyStatement (tclause)) | |
7040 | { | |
7041 | tEmptyErr = optgenerror | |
7042 | (FLG_IFEMPTY, | |
7043 | cstring_makeLiteral | |
7044 | ("Body of if clause of if statement is empty"), | |
7045 | exprNode_loc (tclause)); | |
7046 | } | |
7047 | ||
7048 | if (exprNode_isEmptyStatement (eclause)) | |
7049 | { | |
7050 | eEmptyErr = optgenerror | |
7051 | (FLG_IFEMPTY, | |
7052 | cstring_makeLiteral | |
7053 | ("Body of else clause of if statement is empty"), | |
7054 | exprNode_loc (eclause)); | |
7055 | } | |
7056 | } | |
7057 | ||
7058 | if (context_maybeSet (FLG_IFBLOCK)) | |
7059 | { | |
7060 | if (!tEmptyErr | |
7061 | && exprNode_isDefined (tclause) | |
7062 | && !exprNode_isBlock (tclause)) | |
7063 | { | |
7064 | voptgenerror (FLG_IFBLOCK, | |
7065 | message | |
7066 | ("Body of if clause of if statement is not a block: %s", | |
7067 | exprNode_unparse (tclause)), | |
7068 | exprNode_loc (tclause)); | |
7069 | } | |
7070 | ||
7071 | if (!eEmptyErr | |
7072 | && exprNode_isDefined (eclause) | |
7073 | && !exprNode_isBlock (eclause) | |
7074 | && !(eclause->kind == XPR_IF) | |
7075 | && !(eclause->kind == XPR_IFELSE)) | |
7076 | { | |
7077 | voptgenerror | |
7078 | (FLG_IFBLOCK, | |
7079 | message | |
7080 | ("Body of else clause of if statement is not a block: %s", | |
7081 | exprNode_unparse (eclause)), | |
7082 | exprNode_loc (eclause)); | |
7083 | } | |
7084 | } | |
7085 | ||
7086 | if (context_maybeSet (FLG_ELSEIFCOMPLETE)) | |
7087 | { | |
7088 | if (exprNode_isDefined (eclause) | |
7089 | && (eclause->kind == XPR_IF)) | |
7090 | { | |
7091 | voptgenerror (FLG_ELSEIFCOMPLETE, | |
7092 | message ("Incomplete else if logic (no final else): %s", | |
7093 | exprNode_unparse (eclause)), | |
7094 | exprNode_loc (eclause)); | |
7095 | } | |
7096 | } | |
7097 | ||
7098 | if (exprNode_isError (pred)) | |
7099 | { | |
7100 | if (exprNode_isError (tclause)) | |
7101 | { | |
7102 | if (exprNode_isError (eclause)) | |
7103 | { | |
7104 | ret = exprNode_createLoc (ctype_unknown, fileloc_copy (g_currentloc)); | |
7105 | } | |
7106 | else | |
7107 | { | |
7108 | ret = exprNode_createPartialCopy (eclause); | |
7109 | } | |
7110 | } | |
7111 | else | |
7112 | { | |
7113 | ret = exprNode_createPartialCopy (tclause); | |
7114 | } | |
7115 | } | |
7116 | else /* pred is okay */ | |
7117 | { | |
7118 | ret = exprNode_createPartialCopy (pred); | |
7119 | ||
7120 | if (exprNode_mustEscape (pred)) | |
7121 | { | |
7122 | voptgenerror | |
7123 | (FLG_UNREACHABLE, | |
7124 | message ("Predicate always exits: %s", exprNode_unparse (pred)), | |
7125 | exprNode_loc (pred)); | |
7126 | } | |
7127 | ||
7128 | exprNode_checkUse (ret, pred->sref, pred->loc); | |
7129 | exprNode_mergeCondUSs (ret, tclause, eclause); | |
7130 | } | |
7131 | ||
7132 | ret->kind = XPR_IFELSE; | |
7133 | ret->edata = exprData_makeCond (pred, tclause, eclause); | |
7134 | ||
7135 | if (exprNode_isDefined (tclause) && exprNode_isDefined (eclause)) | |
7136 | { | |
7137 | exprNode_combineControl (ret, tclause, eclause); | |
7138 | ret->loc = fileloc_update (ret->loc, eclause->loc); | |
7139 | } | |
7140 | ||
7141 | return ret; | |
7142 | } | |
7143 | ||
7144 | /* | |
7145 | ** *allpaths <- TRUE iff all executions paths must go through the switch | |
7146 | */ | |
7147 | ||
7148 | static bool | |
7149 | checkSwitchExpr (exprNode test, /*@dependent@*/ exprNode e, /*@out@*/ bool *allpaths) | |
7150 | { | |
7151 | exprNodeSList el = exprNode_flatten (e); | |
7152 | bool mustReturn = TRUE; /* find a branch that doesn't */ | |
7153 | bool thisReturn = FALSE; | |
7154 | bool hasDefault = FALSE; | |
7155 | bool hasAllMembers = FALSE; | |
7156 | bool inSwitch = FALSE; | |
7157 | bool isEnumSwitch = FALSE; | |
7158 | bool canBreak = FALSE; | |
7159 | bool fallThrough = FALSE; | |
7160 | ctype ct = ctype_unknown; | |
7161 | enumNameSList usedEnums; | |
7162 | enumNameList enums; | |
7163 | ||
7164 | if (exprNode_isDefined (test)) | |
7165 | { | |
7166 | ctype ttype; | |
7167 | ||
7168 | ct = test->typ; | |
7169 | ttype = ctype_realType (ct); | |
7170 | ||
7171 | if (ctype_isEnum (ttype)) | |
7172 | { | |
7173 | isEnumSwitch = TRUE; | |
7174 | enums = ctype_elist (ttype); | |
7175 | usedEnums = enumNameSList_new (); | |
7176 | } | |
7177 | } | |
7178 | ||
7179 | exprNodeSList_elements (el, current) | |
7180 | { | |
7181 | ||
7182 | DPRINTF ((message("checkSwitchExpr current = %s ", exprNode_unparse(current) ) )); | |
7183 | ||
7184 | if (exprNode_isDefined (current)) | |
7185 | { | |
7186 | switch (current->kind) | |
7187 | { | |
7188 | case XPR_FTDEFAULT: | |
7189 | case XPR_DEFAULT: | |
7190 | if (hasDefault) | |
7191 | { | |
7192 | voptgenerror | |
7193 | (FLG_DUPLICATECASES, | |
7194 | message ("Duplicate default cases in switch"), | |
7195 | exprNode_loc (current)); | |
7196 | } | |
7197 | /*@fallthrough@*/ | |
7198 | case XPR_FTCASE: | |
7199 | case XPR_CASE: | |
7200 | if (current->kind == XPR_DEFAULT || current->kind == XPR_FTDEFAULT) | |
7201 | { | |
7202 | hasDefault = TRUE; | |
7203 | } | |
7204 | else | |
7205 | { | |
7206 | if (isEnumSwitch) | |
7207 | { | |
7208 | exprNode st = exprData_getSingle (current->edata); | |
7209 | uentry ue = exprNode_getUentry (st); | |
7210 | ||
7211 | if (uentry_isValid (ue)) | |
7212 | { | |
7213 | cstring cname = uentry_rawName (ue); | |
7214 | ||
7215 | if (enumNameList_member (/*@-usedef@*/enums/*@=usedef@*/, cname)) | |
7216 | { | |
7217 | if (enumNameSList_member | |
7218 | (/*@-usedef@*/usedEnums/*@=usedef@*/, cname)) | |
7219 | { | |
7220 | voptgenerror | |
7221 | (FLG_DUPLICATECASES, | |
7222 | message ("Duplicate case in switch: %s", | |
7223 | cname), | |
7224 | current->loc); | |
7225 | } | |
7226 | else | |
7227 | { | |
7228 | enumNameSList_addh (usedEnums, cname); | |
7229 | } | |
7230 | } | |
7231 | else | |
7232 | { | |
7233 | voptgenerror | |
7234 | (FLG_TYPE, | |
7235 | message ("Case in switch not %s member: %s", | |
7236 | ctype_unparse (ct), cname), | |
7237 | current->loc); | |
7238 | } | |
7239 | } | |
7240 | } | |
7241 | } | |
7242 | ||
7243 | if (inSwitch && !fallThrough) | |
7244 | { | |
7245 | if (!thisReturn || canBreak) | |
7246 | { | |
7247 | mustReturn = FALSE; | |
7248 | } | |
7249 | } | |
7250 | ||
7251 | fallThrough = TRUE; | |
7252 | inSwitch = TRUE; | |
7253 | thisReturn = FALSE; | |
7254 | canBreak = FALSE; | |
7255 | /*@switchbreak@*/ break; | |
7256 | default: | |
7257 | thisReturn = thisReturn || exprNode_mustEscape (current); | |
7258 | canBreak = canBreak || current->canBreak; | |
7259 | if (canBreak) fallThrough = FALSE; | |
7260 | } | |
7261 | } | |
7262 | } end_exprNodeSList_elements; | |
7263 | ||
7264 | if (inSwitch) /* check the last one! */ | |
7265 | { | |
7266 | if (!thisReturn || canBreak) | |
7267 | { | |
7268 | mustReturn = FALSE; | |
7269 | } | |
7270 | } | |
7271 | ||
7272 | if (isEnumSwitch) | |
7273 | { | |
7274 | if (!hasDefault | |
7275 | && (enumNameSList_size (/*@-usedef@*/usedEnums/*@=usedef@*/) != | |
7276 | enumNameList_size (/*@-usedef@*/enums/*@=usedef@*/))) | |
7277 | { | |
7278 | enumNameSList unused = enumNameSList_subtract (enums, usedEnums); | |
7279 | ||
7280 | voptgenerror (FLG_MISSCASE, | |
7281 | message ("Missing case%s in switch: %q", | |
7282 | cstring_makeLiteralTemp | |
7283 | ((enumNameSList_size (unused) > 1) ? "s" : ""), | |
7284 | enumNameSList_unparse (unused)), | |
7285 | g_currentloc); | |
7286 | ||
7287 | enumNameSList_free (unused); | |
7288 | *allpaths = FALSE; /* evans 2002-01-01 */ | |
7289 | } | |
7290 | else | |
7291 | { | |
7292 | hasAllMembers = TRUE; | |
7293 | *allpaths = TRUE; | |
7294 | } | |
7295 | ||
7296 | enumNameSList_free (usedEnums); | |
7297 | } | |
7298 | else | |
7299 | { | |
7300 | *allpaths = hasDefault; | |
7301 | } | |
7302 | ||
7303 | exprNodeSList_free (el); | |
7304 | return ((hasDefault || hasAllMembers) && mustReturn); | |
7305 | } | |
7306 | ||
7307 | exprNode exprNode_switch (/*@only@*/ exprNode e, /*@only@*/ exprNode s) | |
7308 | { | |
7309 | exprNode ret = exprNode_createPartialCopy (e); | |
7310 | bool allpaths; | |
7311 | ||
7312 | DPRINTF (("Switch: %s", exprNode_unparse (s))); | |
7313 | ||
7314 | ret->kind = XPR_SWITCH; | |
7315 | ret->edata = exprData_makePair (e, s); | |
7316 | ||
7317 | if (!exprNode_isError (s)) | |
7318 | { | |
7319 | exprNode fs = exprNode_firstStatement (s); | |
7320 | ret->loc = fileloc_update (ret->loc, s->loc); | |
7321 | ||
7322 | if (exprNode_isUndefined (fs) | |
7323 | || exprNode_isCaseMarker (fs) || exprNode_isLabelMarker (fs) | |
7324 | || exprNode_isDefaultMarker (fs)) { | |
7325 | ; | |
7326 | } else { | |
7327 | voptgenerror (FLG_FIRSTCASE, | |
7328 | message | |
7329 | ("Statement after switch is not a case: %s", exprNode_unparse (fs)), | |
7330 | fs->loc); | |
7331 | } | |
7332 | } | |
7333 | ||
7334 | if (!exprNode_isError (e)) | |
7335 | { | |
7336 | if (checkSwitchExpr (e, s, &allpaths)) | |
7337 | { | |
7338 | ret->exitCode = XK_MUSTRETURN; | |
7339 | } | |
7340 | else | |
7341 | { | |
7342 | ret->exitCode = e->exitCode; | |
7343 | } | |
7344 | ||
7345 | ret->canBreak = e->canBreak; | |
7346 | ret->mustBreak = e->mustBreak; | |
7347 | } | |
7348 | /* | |
7349 | ** forgot this! | |
7350 | ** exprNode.c:3883,32: Variable allpaths used before definition | |
7351 | */ | |
7352 | else | |
7353 | { | |
7354 | allpaths = FALSE; | |
7355 | } | |
7356 | ||
7357 | DPRINTF (("Context exit switch!")); | |
7358 | context_exitSwitch (ret, allpaths); | |
7359 | DPRINTF (("Context exit switch done!")); | |
7360 | ||
7361 | return ret; | |
7362 | } | |
7363 | ||
7364 | static void checkInfiniteLoop (/*@notnull@*/ exprNode test, | |
7365 | /*@notnull@*/ exprNode body) | |
7366 | { | |
7367 | sRefSet tuses = test->uses; | |
7368 | ||
7369 | if (!sRefSet_isEmpty (test->uses)) | |
7370 | { | |
7371 | sRefSet sets = sRefSet_newCopy (body->sets); | |
7372 | bool hasError = TRUE; | |
7373 | bool innerState = FALSE; | |
7374 | sRefSet tuncon = sRefSet_undefined; | |
7375 | ||
7376 | sets = sRefSet_union (sets, test->sets); | |
7377 | sets = sRefSet_union (sets, body->msets); | |
7378 | sets = sRefSet_union (sets, test->msets); | |
7379 | ||
7380 | sRefSet_allElements (tuses, el) | |
7381 | { | |
7382 | if (sRef_isUnconstrained (el)) | |
7383 | { | |
7384 | tuncon = sRefSet_insert (tuncon, el); | |
7385 | } | |
7386 | else | |
7387 | { | |
7388 | if (sRefSet_member (sets, el)) | |
7389 | { | |
7390 | hasError = FALSE; | |
7391 | break; | |
7392 | } | |
7393 | } | |
7394 | ||
7395 | if (sRef_isInternalState (el) | |
7396 | || sRef_isFileStatic (sRef_getRootBase (el))) | |
7397 | { | |
7398 | innerState = TRUE; | |
7399 | } | |
7400 | } end_sRefSet_allElements ; | |
7401 | ||
7402 | if (hasError) | |
7403 | { | |
7404 | sRefSet suncon = sRefSet_undefined; | |
7405 | bool sinner = FALSE; | |
7406 | ||
7407 | sRefSet_allElements (sets, el) | |
7408 | { | |
7409 | if (sRef_isUnconstrained (el)) | |
7410 | { | |
7411 | suncon = sRefSet_insert (suncon, el); | |
7412 | } | |
7413 | else if (sRef_isInternalState (el)) | |
7414 | { | |
7415 | sinner = TRUE; | |
7416 | } | |
7417 | else | |
7418 | { | |
7419 | ; | |
7420 | } | |
7421 | } end_sRefSet_allElements ; | |
7422 | ||
7423 | if (sinner && innerState) | |
7424 | { | |
7425 | ; | |
7426 | } | |
7427 | else if (sRefSet_isEmpty (tuncon) | |
7428 | && sRefSet_isEmpty (suncon)) | |
7429 | { | |
7430 | voptgenerror | |
7431 | (FLG_INFLOOPS, | |
7432 | message | |
7433 | ("Suspected infinite loop. No value used in loop test (%q) " | |
7434 | "is modified by test or loop body.", | |
7435 | sRefSet_unparsePlain (tuses)), | |
7436 | test->loc); | |
7437 | } | |
7438 | else | |
7439 | { | |
7440 | if (sRefSet_isEmpty (tuncon)) | |
7441 | { | |
7442 | voptgenerror | |
7443 | (FLG_INFLOOPSUNCON, | |
7444 | message ("Suspected infinite loop. No condition values " | |
7445 | "modified. Modification possible through " | |
7446 | "unconstrained calls: %q", | |
7447 | sRefSet_unparsePlain (suncon)), | |
7448 | test->loc); | |
7449 | } | |
7450 | else | |
7451 | { | |
7452 | voptgenerror | |
7453 | (FLG_INFLOOPSUNCON, | |
7454 | message ("Suspected infinite loop. No condition values " | |
7455 | "modified. Possible undetected dependency through " | |
7456 | "unconstrained calls in loop test: %q", | |
7457 | sRefSet_unparsePlain (tuncon)), | |
7458 | test->loc); | |
7459 | } | |
7460 | } | |
7461 | } | |
7462 | ||
7463 | sRefSet_free (sets); | |
7464 | } | |
7465 | } | |
7466 | ||
7467 | exprNode exprNode_while (/*@keep@*/ exprNode t, /*@keep@*/ exprNode b) | |
7468 | { | |
7469 | exprNode ret; | |
7470 | bool emptyErr = FALSE; | |
7471 | ||
7472 | if (context_maybeSet (FLG_WHILEEMPTY)) | |
7473 | { | |
7474 | if (exprNode_isEmptyStatement (b)) | |
7475 | { | |
7476 | emptyErr = optgenerror | |
7477 | (FLG_WHILEEMPTY, | |
7478 | cstring_makeLiteral | |
7479 | ("Body of while statement is empty"), | |
7480 | exprNode_loc (b)); | |
7481 | } | |
7482 | } | |
7483 | ||
7484 | if (!emptyErr && context_maybeSet (FLG_WHILEBLOCK)) | |
7485 | { | |
7486 | if (exprNode_isDefined (b) | |
7487 | && !exprNode_isBlock (b)) | |
7488 | { | |
7489 | if (context_inIterDef () | |
7490 | && (b->kind == XPR_STMTLIST | |
7491 | || b->kind == XPR_TOK)) | |
7492 | { | |
7493 | ; /* no error */ | |
7494 | } | |
7495 | else | |
7496 | { | |
7497 | voptgenerror (FLG_WHILEBLOCK, | |
7498 | message | |
7499 | ("Body of while statement is not a block: %s", | |
7500 | exprNode_unparse (b)), | |
7501 | exprNode_loc (b)); | |
7502 | } | |
7503 | } | |
7504 | } | |
7505 | ||
7506 | if (exprNode_isError (t)) | |
7507 | { | |
7508 | if (exprNode_isError (b)) | |
7509 | { | |
7510 | ret = exprNode_createLoc (ctype_unknown, fileloc_copy (g_currentloc)); | |
7511 | } | |
7512 | else | |
7513 | { | |
7514 | ret = exprNode_createPartialCopy (b); | |
7515 | } | |
7516 | } | |
7517 | else | |
7518 | { | |
7519 | exprNode test; | |
7520 | ||
7521 | ret = exprNode_createPartialCopy (t); | |
7522 | ||
7523 | llassert (t->kind == XPR_WHILEPRED); | |
7524 | ||
7525 | test = exprData_getSingle (t->edata); | |
7526 | ||
7527 | if (!exprNode_isError (b) && exprNode_isDefined (test)) | |
7528 | { | |
7529 | if (context_maybeSet (FLG_INFLOOPS) | |
7530 | || context_maybeSet (FLG_INFLOOPSUNCON)) | |
7531 | { | |
7532 | /* | |
7533 | ** check that some variable in the predicate is set by the body | |
7534 | ** if the predicate uses any variables | |
7535 | */ | |
7536 | ||
7537 | checkInfiniteLoop (test, b); | |
7538 | } | |
7539 | ||
7540 | exprNode_mergeUSs (ret, b); | |
7541 | ||
7542 | if (exprNode_isDefined (b)) | |
7543 | { | |
7544 | ret->exitCode = exitkind_makeConditional (b->exitCode); | |
7545 | } | |
7546 | } | |
7547 | } | |
7548 | ||
7549 | ret->edata = exprData_makePair (t, b); | |
7550 | ret->kind = XPR_WHILE; | |
7551 | ||
7552 | if (exprNode_isDefined (t) && exprNode_mustEscape (t)) | |
7553 | { | |
7554 | voptgenerror | |
7555 | (FLG_ALWAYSEXITS, | |
7556 | message ("Predicate always exits: %s", exprNode_unparse (t)), | |
7557 | exprNode_loc (t)); | |
7558 | } | |
7559 | ||
7560 | ret->exitCode = XK_NEVERESCAPE; | |
7561 | ||
7562 | /* | |
7563 | ** If loop is infinite, and there is no break inside, | |
7564 | ** exit code is never reach. | |
7565 | */ | |
7566 | ||
7567 | if (exprNode_knownIntValue (t)) | |
7568 | { | |
7569 | if (!exprNode_isZero (t)) | |
7570 | { | |
7571 | if (exprNode_isDefined (b)) | |
7572 | { | |
7573 | if (!b->canBreak) | |
7574 | { | |
7575 | /* Really, it means never reached. */ | |
7576 | ret->exitCode = XK_MUSTEXIT; | |
7577 | } | |
7578 | } | |
7579 | } | |
7580 | } | |
7581 | else | |
7582 | { | |
7583 | ; | |
7584 | } | |
7585 | ||
7586 | ret->canBreak = FALSE; | |
7587 | ret->mustBreak = FALSE; | |
7588 | ||
7589 | return ret; | |
7590 | } | |
7591 | ||
7592 | /* | |
7593 | ** do { b } while (t); | |
7594 | ** | |
7595 | ** note: body passed as first argument | |
7596 | */ | |
7597 | ||
7598 | exprNode exprNode_doWhile (/*@only@*/ exprNode b, /*@only@*/ exprNode t) | |
7599 | { | |
7600 | exprNode ret; | |
7601 | ||
7602 | DPRINTF (("Do while: %s / %s", | |
7603 | exprNode_unparse (b), exprNode_unparse (t))); | |
7604 | ||
7605 | if (exprNode_isError (t)) | |
7606 | { | |
7607 | if (exprNode_isError (b)) | |
7608 | { | |
7609 | ret = exprNode_createLoc (ctype_unknown, fileloc_copy (g_currentloc)); | |
7610 | } | |
7611 | else | |
7612 | { | |
7613 | ret = exprNode_createPartialCopy (b); | |
7614 | ||
7615 | ret->exitCode = exitkind_makeConditional (b->exitCode); | |
7616 | exprNode_checkUse (ret, b->sref, b->loc); | |
7617 | ret->exitCode = b->exitCode; | |
7618 | ret->canBreak = b->canBreak; | |
7619 | ret->mustBreak = FALSE; | |
7620 | } | |
7621 | } | |
7622 | else | |
7623 | { | |
7624 | DPRINTF (("Do while: %s / %s", | |
7625 | exitkind_unparse (t->exitCode), | |
7626 | exitkind_unparse (b->exitCode))); | |
7627 | ||
7628 | ret = exprNode_createPartialCopy (t); | |
7629 | exprNode_checkPred (cstring_makeLiteralTemp ("while"), t); | |
7630 | ||
7631 | if (!exprNode_isError (b)) | |
7632 | { | |
7633 | /* | |
7634 | ** forgot the copy's --- why wasn't this detected?? | |
7635 | */ | |
7636 | ||
7637 | ret->sets = sRefSet_copyInto (ret->sets, b->sets); | |
7638 | ret->msets = sRefSet_copyInto (ret->msets, b->msets); | |
7639 | ret->uses = sRefSet_copyInto (ret->uses, b->uses); | |
7640 | ||
7641 | /* left this out --- causes and aliasing bug (infinite loop) | |
7642 | should be detected?? */ | |
7643 | ||
7644 | exprNode_checkUse (ret, b->sref, b->loc); | |
7645 | exprNode_mergeUSs (ret, t); | |
7646 | exprNode_checkUse (ret, t->sref, t->loc); | |
7647 | ||
7648 | /* evans 2001-10-05: while loop can break */ | |
7649 | ret->exitCode = exitkind_makeConditional (b->exitCode); | |
7650 | ||
7651 | DPRINTF (("Do while: %s", | |
7652 | exitkind_unparse (ret->exitCode))); | |
7653 | ||
7654 | ret->canBreak = b->canBreak; | |
7655 | ||
7656 | /* Always FALSE for doWhile loops - break's when test is false */ | |
7657 | ret->mustBreak = FALSE; /* b->mustBreak; */ | |
7658 | } | |
7659 | } | |
7660 | ||
7661 | context_exitDoWhileClause (t); | |
7662 | ||
7663 | ret->kind = XPR_DOWHILE; | |
7664 | ret->edata = exprData_makePair (t, b); | |
7665 | return ret; | |
7666 | } | |
7667 | ||
7668 | bool exprNode_loopMustExec (exprNode forPred) | |
7669 | { | |
7670 | /* | |
7671 | ** Returns true if it is obvious that the loop always executes at least once | |
7672 | ** | |
7673 | ** For now, we only identify the most obvious cases. Should be true anytime | |
7674 | ** we can prove init => !test. | |
7675 | */ | |
7676 | ||
7677 | if (exprNode_isDefined (forPred)) | |
7678 | { | |
7679 | exprNode init, test, inc; | |
7680 | exprData edata; | |
7681 | ||
7682 | llassert (forPred->kind == XPR_FORPRED); | |
7683 | ||
7684 | edata = forPred->edata; | |
7685 | init = exprData_getTripleInit (edata); | |
7686 | test = exprData_getTripleTest (edata); | |
7687 | inc = exprData_getTripleInc (edata); | |
7688 | ||
7689 | if (exprNode_isAssign (init)) | |
7690 | { | |
7691 | exprNode loopVar = exprData_getOpA (init->edata); | |
7692 | exprNode loopInit = exprData_getOpB (init->edata); | |
7693 | ||
7694 | if (exprNode_isDefined (test) && test->kind == XPR_OP) | |
7695 | { | |
7696 | exprNode testVar = exprData_getOpA (test->edata); | |
7697 | exprNode testVal = exprData_getOpB (test->edata); | |
7698 | lltok comp = exprData_getOpTok (test->edata); | |
7699 | int opid = lltok_getTok (comp); | |
7700 | ||
7701 | DPRINTF (("Same storage: %s / %s", exprNode_unparse (loopVar), | |
7702 | exprNode_unparse (testVar))); | |
7703 | ||
7704 | if (exprNode_sameStorage (loopVar, testVar)) | |
7705 | { | |
7706 | multiVal valinit = exprNode_getValue (loopInit); | |
7707 | multiVal valtest = exprNode_getValue (testVal); | |
7708 | ||
7709 | DPRINTF (("Values: %s / %s", multiVal_unparse (valinit), | |
7710 | multiVal_unparse (valtest))); | |
7711 | ||
7712 | if (multiVal_isInt (valinit) && multiVal_isInt (valtest)) | |
7713 | { | |
7714 | long v1 = multiVal_forceInt (valinit); | |
7715 | long v2 = multiVal_forceInt (valtest); | |
7716 | ||
7717 | DPRINTF (("Here: %ld %ld", v1, v2)); | |
7718 | ||
7719 | if ((opid == EQ_OP && v1 < v2) | |
7720 | || (opid == NE_OP && v1 != v2) | |
7721 | || (opid == TLT && v1 <= v2) | |
7722 | || (opid == TGT && v1 >= v2) | |
7723 | || (opid == LE_OP && v1 < v2) | |
7724 | || (opid == GE_OP && v1 > v2)) | |
7725 | { | |
7726 | DPRINTF (("mustexec if inc")); | |
7727 | return TRUE; | |
7728 | } | |
7729 | } | |
7730 | } | |
7731 | } | |
7732 | } | |
7733 | } | |
7734 | ||
7735 | DPRINTF (("loop must exec: FALSE")); | |
7736 | return FALSE; | |
7737 | } | |
7738 | ||
7739 | exprNode exprNode_for (/*@keep@*/ exprNode inc, /*@keep@*/ exprNode body) | |
7740 | { | |
7741 | exprNode ret; | |
7742 | bool emptyErr = FALSE; | |
7743 | ||
7744 | if (context_maybeSet (FLG_FOREMPTY)) | |
7745 | { | |
7746 | if (exprNode_isEmptyStatement (body)) | |
7747 | { | |
7748 | emptyErr = optgenerror | |
7749 | (FLG_FOREMPTY, | |
7750 | cstring_makeLiteral | |
7751 | ("Body of for statement is empty"), | |
7752 | exprNode_loc (body)); | |
7753 | } | |
7754 | } | |
7755 | ||
7756 | if (!emptyErr && context_maybeSet (FLG_FORBLOCK)) | |
7757 | { | |
7758 | if (exprNode_isDefined (body) | |
7759 | && !exprNode_isBlock (body)) | |
7760 | { | |
7761 | if (context_inIterDef () | |
7762 | && (body->kind == XPR_STMTLIST | |
7763 | || body->kind == XPR_TOK)) | |
7764 | { | |
7765 | ; /* no error */ | |
7766 | } | |
7767 | else | |
7768 | { | |
7769 | voptgenerror (FLG_FORBLOCK, | |
7770 | message | |
7771 | ("Body of for statement is not a block: %s", | |
7772 | exprNode_unparse (body)), | |
7773 | exprNode_loc (body)); | |
7774 | } | |
7775 | } | |
7776 | } | |
7777 | ||
7778 | /* | |
7779 | ** for ud purposes: (alreadly) init -> test -> (now) LOOP: body + inc + test | |
7780 | */ | |
7781 | ||
7782 | if (exprNode_isError (body)) | |
7783 | { | |
7784 | ret = exprNode_createPartialCopy (inc); | |
7785 | } | |
7786 | else | |
7787 | { | |
7788 | ret = exprNode_createPartialCopy (body); | |
7789 | ||
7790 | ret->exitCode = exitkind_makeConditional (body->exitCode); | |
7791 | ||
7792 | exprNode_mergeUSs (inc, body); | |
7793 | ||
7794 | if (exprNode_isDefined (inc)) | |
7795 | { | |
7796 | exprNode tmp; | |
7797 | ||
7798 | context_setMessageAnnote (cstring_makeLiteral ("in post loop increment")); | |
7799 | ||
7800 | tmp = exprNode_effect (exprData_getTripleInc (inc->edata)); | |
7801 | exprNode_freeShallow (tmp); | |
7802 | ||
7803 | context_clearMessageAnnote (); | |
7804 | context_setMessageAnnote (cstring_makeLiteral ("in post loop test")); | |
7805 | ||
7806 | tmp = exprNode_effect (exprData_getTripleTest (inc->edata)); | |
7807 | exprNode_freeShallow (tmp); | |
7808 | ||
7809 | context_clearMessageAnnote (); | |
7810 | ||
7811 | ret->uses = sRefSet_copyInto (ret->uses, inc->uses); | |
7812 | ret->sets = sRefSet_copyInto (ret->sets, inc->sets); | |
7813 | ret->msets = sRefSet_copyInto (ret->msets, inc->msets); | |
7814 | } | |
7815 | } | |
7816 | ||
7817 | ret->kind = XPR_FOR; | |
7818 | ret->edata = exprData_makePair (inc, body); | |
7819 | ||
7820 | if (exprNode_isDefined (inc)) { | |
7821 | exprNode test = exprData_getTripleTest (inc->edata); | |
7822 | ||
7823 | if (exprNode_isUndefined (test)) { | |
7824 | if (exprNode_isDefined (body)) { | |
7825 | if (!body->canBreak) { | |
7826 | /* Really, it means never reached. */ | |
7827 | ret->exitCode = XK_MUSTEXIT; | |
7828 | } | |
7829 | } | |
7830 | } | |
7831 | } | |
7832 | ||
7833 | return (ret); | |
7834 | } | |
7835 | ||
7836 | /* | |
7837 | ** for (init; test; inc) | |
7838 | ** ==> | |
7839 | ** init; | |
7840 | ** while (test) { body; inc; } | |
7841 | ** | |
7842 | ** Now: check use of init (may set vars for test) | |
7843 | ** check use of test | |
7844 | ** no checks on inc | |
7845 | _*/ | |
7846 | ||
7847 | /*@observer@*/ guardSet exprNode_getForGuards (exprNode pred) | |
7848 | { | |
7849 | exprNode test; | |
7850 | ||
7851 | if (exprNode_isError (pred)) return guardSet_undefined; | |
7852 | ||
7853 | llassert (pred->kind == XPR_FORPRED); | |
7854 | ||
7855 | test = exprData_getTripleTest (pred->edata); | |
7856 | ||
7857 | if (!exprNode_isError (test)) | |
7858 | { | |
7859 | return (test->guards); | |
7860 | } | |
7861 | ||
7862 | return guardSet_undefined; | |
7863 | } | |
7864 | ||
7865 | exprNode exprNode_whilePred (/*@only@*/ exprNode test) | |
7866 | { | |
7867 | exprNode ret = exprNode_createSemiCopy (test); | |
7868 | ||
7869 | if (exprNode_isDefined (test)) | |
7870 | { | |
7871 | exprNode_copySets (ret, test); | |
7872 | exprNode_checkPred (cstring_makeLiteralTemp ("while"), test); | |
7873 | exprNode_checkUse (ret, test->sref, test->loc); | |
7874 | ||
7875 | exprNode_produceGuards (test); | |
7876 | ||
7877 | ret->guards = guardSet_copy (test->guards); | |
7878 | } | |
7879 | ||
7880 | ret->edata = exprData_makeSingle (test); | |
7881 | ret->kind = XPR_WHILEPRED; | |
7882 | return ret; | |
7883 | } | |
7884 | ||
7885 | exprNode exprNode_forPred (/*@only@*/ exprNode init, /*@only@*/ exprNode test, | |
7886 | /*@only@*/ exprNode inc) | |
7887 | { | |
7888 | exprNode ret; | |
7889 | ||
7890 | /* | |
7891 | ** for ud purposes: init -> test -> LOOP: [ body, inc ] | |
7892 | */ | |
7893 | ||
7894 | exprNode_checkPred (cstring_makeLiteralTemp ("for"), test); | |
7895 | ||
7896 | if (!exprNode_isError (inc)) | |
7897 | { | |
7898 | ret = exprNode_createPartialCopy (inc); | |
7899 | } | |
7900 | else | |
7901 | { | |
7902 | if (!exprNode_isError (init)) | |
7903 | { | |
7904 | ret = exprNode_createPartialCopy (init); | |
7905 | } | |
7906 | else if (!exprNode_isError (test)) | |
7907 | { | |
7908 | ret = exprNode_createPartialCopy (test); | |
7909 | } | |
7910 | else | |
7911 | { | |
7912 | ret = exprNode_createUnknown (); | |
7913 | } | |
7914 | } | |
7915 | ||
7916 | exprNode_mergeUSs (ret, init); | |
7917 | ||
7918 | if (exprNode_isDefined (init)) | |
7919 | { | |
7920 | exprNode_checkUse (ret, init->sref, init->loc); | |
7921 | } | |
7922 | ||
7923 | exprNode_mergeUSs (ret, test); | |
7924 | ||
7925 | if (exprNode_isDefined (test)) | |
7926 | { | |
7927 | exprNode_checkUse (ret, test->sref, test->loc); | |
7928 | } | |
7929 | ||
7930 | ret->kind = XPR_FORPRED; | |
7931 | ret->edata = exprData_makeFor (init, test, inc); | |
7932 | return (ret); | |
7933 | } | |
7934 | ||
7935 | /*@notnull@*/ /*@only@*/ exprNode exprNode_goto (/*@only@*/ cstring label) | |
7936 | { | |
7937 | exprNode ret = exprNode_createUnknown (); | |
7938 | ||
7939 | if (context_inMacro ()) | |
7940 | { | |
7941 | voptgenerror (FLG_MACROSTMT, | |
7942 | message ("Macro %s uses goto (not functional)", | |
7943 | context_inFunctionName ()), | |
7944 | g_currentloc); | |
7945 | } | |
7946 | ||
7947 | ret->kind = XPR_GOTO; | |
7948 | ret->edata = exprData_makeLiteral (label); | |
7949 | ret->mustBreak = TRUE; | |
7950 | ret->exitCode = XK_GOTO; | |
7951 | ret->canBreak = TRUE; | |
7952 | return ret; | |
7953 | } | |
7954 | ||
7955 | exprNode exprNode_continue (/*@only@*/ lltok l, int qcontinue) | |
7956 | { | |
7957 | exprNode ret = exprNode_createLoc (ctype_unknown, fileloc_copy (lltok_getLoc (l))); | |
7958 | ||
7959 | ret->kind = XPR_CONTINUE; | |
7960 | ret->edata = exprData_makeTok (l); | |
7961 | ret->canBreak = TRUE; | |
7962 | ret->mustBreak = TRUE; | |
7963 | ||
7964 | if (qcontinue == QSAFEBREAK) | |
7965 | { | |
7966 | ; /* no checking */ | |
7967 | } | |
7968 | else if (qcontinue == QINNERCONTINUE) | |
7969 | { | |
7970 | if (!context_inDeepLoop ()) | |
7971 | { | |
7972 | voptgenerror | |
7973 | (FLG_LOOPLOOPCONTINUE, | |
7974 | cstring_makeLiteral ("Continue statement marked with innercontinue " | |
7975 | "is not inside a nested loop"), | |
7976 | exprNode_loc (ret)); | |
7977 | } | |
7978 | } | |
7979 | else if (qcontinue == BADTOK) | |
7980 | { | |
7981 | if (context_inDeepLoop ()) | |
7982 | { | |
7983 | voptgenerror | |
7984 | (FLG_LOOPLOOPCONTINUE, | |
7985 | cstring_makeLiteral ("Continue statement in nested loop"), | |
7986 | exprNode_loc (ret)); | |
7987 | } | |
7988 | } | |
7989 | else | |
7990 | { | |
7991 | llbuglit ("exprNode_continue: bad qcontinue"); | |
7992 | } | |
7993 | ||
7994 | return ret; | |
7995 | } | |
7996 | ||
7997 | exprNode exprNode_break (/*@only@*/ lltok l, int bqual) | |
7998 | { | |
7999 | exprNode ret = exprNode_createLoc (ctype_unknown, fileloc_copy (lltok_getLoc (l))); | |
8000 | clause breakClause = context_breakClause (); | |
8001 | ||
8002 | ret->kind = XPR_BREAK; | |
8003 | ret->edata = exprData_makeTok (l); | |
8004 | ret->canBreak = TRUE; | |
8005 | ret->mustBreak = TRUE; | |
8006 | ||
8007 | if (breakClause == NOCLAUSE) | |
8008 | { | |
8009 | voptgenerror | |
8010 | (FLG_SYNTAX, | |
8011 | cstring_makeLiteral ("Break not inside while, for or switch statement"), | |
8012 | exprNode_loc (ret)); | |
8013 | } | |
8014 | else | |
8015 | { | |
8016 | if (bqual != BADTOK) | |
8017 | { | |
8018 | switch (bqual) | |
8019 | { | |
8020 | case QSAFEBREAK: | |
8021 | break; | |
8022 | case QINNERBREAK: | |
8023 | if (breakClause == SWITCHCLAUSE) | |
8024 | { | |
8025 | if (!context_inDeepSwitch ()) | |
8026 | { | |
8027 | voptgenerror (FLG_SYNTAX, | |
8028 | cstring_makeLiteral | |
8029 | ("Break preceded by innerbreak is not in a deep switch"), | |
8030 | exprNode_loc (ret)); | |
8031 | } | |
8032 | } | |
8033 | else | |
8034 | { | |
8035 | if (!context_inDeepLoop ()) | |
8036 | { | |
8037 | voptgenerror (FLG_SYNTAX, | |
8038 | cstring_makeLiteral | |
8039 | ("Break preceded by innerbreak is not in a deep loop"), | |
8040 | exprNode_loc (ret)); | |
8041 | } | |
8042 | } | |
8043 | break; | |
8044 | case QLOOPBREAK: | |
8045 | if (breakClause == SWITCHCLAUSE) | |
8046 | { | |
8047 | voptgenerror (FLG_SYNTAX, | |
8048 | cstring_makeLiteral | |
8049 | ("Break preceded by loopbreak is breaking a switch"), | |
8050 | exprNode_loc (ret)); | |
8051 | } | |
8052 | break; | |
8053 | case QSWITCHBREAK: | |
8054 | if (breakClause != SWITCHCLAUSE) | |
8055 | { | |
8056 | voptgenerror | |
8057 | (FLG_SYNTAX, | |
8058 | message ("Break preceded by switchbreak is breaking %s", | |
8059 | cstring_makeLiteralTemp | |
8060 | ((breakClause == WHILECLAUSE | |
8061 | || breakClause == DOWHILECLAUSE) ? "a while loop" | |
8062 | : (breakClause == FORCLAUSE) ? "a for loop" | |
8063 | : (breakClause == ITERCLAUSE) ? "an iterator" | |
8064 | : "<error loop>")), | |
8065 | exprNode_loc (ret)); | |
8066 | } | |
8067 | break; | |
8068 | BADDEFAULT; | |
8069 | } | |
8070 | } | |
8071 | else | |
8072 | { | |
8073 | if (breakClause == SWITCHCLAUSE) | |
8074 | { | |
8075 | clause nextBreakClause = context_nextBreakClause (); | |
8076 | ||
8077 | switch (nextBreakClause) | |
8078 | { | |
8079 | case NOCLAUSE: break; | |
8080 | case WHILECLAUSE: | |
8081 | case DOWHILECLAUSE: | |
8082 | case FORCLAUSE: | |
8083 | case ITERCLAUSE: | |
8084 | voptgenerror | |
8085 | (FLG_LOOPSWITCHBREAK, | |
8086 | cstring_makeLiteral ("Break statement in switch inside loop"), | |
8087 | exprNode_loc (ret)); | |
8088 | break; | |
8089 | case SWITCHCLAUSE: | |
8090 | voptgenerror | |
8091 | (FLG_SWITCHSWITCHBREAK, | |
8092 | cstring_makeLiteral ("Break statement in switch inside switch"), | |
8093 | exprNode_loc (ret)); | |
8094 | break; | |
8095 | BADDEFAULT; | |
8096 | } | |
8097 | } | |
8098 | else | |
8099 | { | |
8100 | if (context_inDeepLoop ()) | |
8101 | { | |
8102 | voptgenerror | |
8103 | (FLG_LOOPLOOPBREAK, | |
8104 | cstring_makeLiteral ("Break statement in nested loop"), | |
8105 | exprNode_loc (ret)); | |
8106 | } | |
8107 | else | |
8108 | { | |
8109 | if (context_inDeepLoopSwitch ()) | |
8110 | { | |
8111 | voptgenerror | |
8112 | (FLG_SWITCHLOOPBREAK, | |
8113 | cstring_makeLiteral ("Break statement in loop inside switch"), | |
8114 | exprNode_loc (ret)); | |
8115 | } | |
8116 | } | |
8117 | } | |
8118 | } | |
8119 | } | |
8120 | ||
8121 | return ret; | |
8122 | } | |
8123 | ||
8124 | exprNode exprNode_nullReturn (/*@only@*/ lltok t) | |
8125 | { | |
8126 | fileloc loc = lltok_getLoc (t); | |
8127 | exprNode ret = exprNode_createLoc (ctype_unknown, fileloc_copy (loc)); | |
8128 | ||
8129 | context_returnFunction (); | |
8130 | exprChecks_checkNullReturn (loc); | |
8131 | ||
8132 | ret->kind = XPR_NULLRETURN; | |
8133 | ret->edata = exprData_makeTok (t); | |
8134 | ret->exitCode = XK_MUSTRETURN; | |
8135 | return ret; | |
8136 | } | |
8137 | ||
8138 | exprNode exprNode_return (/*@only@*/ exprNode e) | |
8139 | { | |
8140 | exprNode ret; | |
8141 | ||
8142 | if (exprNode_isError (e)) | |
8143 | { | |
8144 | ret = exprNode_createUnknown (); | |
8145 | } | |
8146 | else | |
8147 | { | |
8148 | ret = exprNode_createLoc (ctype_unknown, fileloc_copy (e->loc)); | |
8149 | ||
8150 | exprNode_checkUse (ret, e->sref, e->loc); | |
8151 | exprNode_checkReturn (e); | |
8152 | } | |
8153 | ||
8154 | context_returnFunction (); | |
8155 | ret->kind = XPR_RETURN; | |
8156 | ret->edata = exprData_makeSingle (e); | |
8157 | ret->exitCode = XK_MUSTRETURN; | |
8158 | ||
8159 | return (ret); | |
8160 | } | |
8161 | ||
8162 | exprNode exprNode_comma (/*@only@*/ exprNode e1, /*@only@*/ exprNode e2) | |
8163 | { | |
8164 | exprNode ret; | |
8165 | ||
8166 | if (exprNode_isError (e1)) | |
8167 | { | |
8168 | if (exprNode_isError (e2)) | |
8169 | { | |
8170 | ret = exprNode_createLoc (ctype_unknown, fileloc_copy (g_currentloc)); | |
8171 | } | |
8172 | else | |
8173 | { | |
8174 | ret = exprNode_createPartialCopy (e2); | |
8175 | exprNode_checkUse (ret, e2->sref, e2->loc); | |
8176 | ret->sref = e2->sref; | |
8177 | } | |
8178 | } | |
8179 | else | |
8180 | { | |
8181 | ret = exprNode_createPartialCopy (e1); | |
8182 | ||
8183 | exprNode_checkUse (ret, e1->sref, e1->loc); | |
8184 | ||
8185 | if (!exprNode_isError (e2)) | |
8186 | { | |
8187 | exprNode_mergeUSs (ret, e2); | |
8188 | exprNode_checkUse (ret, e2->sref, e2->loc); | |
8189 | ret->sref = e2->sref; | |
8190 | } | |
8191 | } | |
8192 | ||
8193 | ret->kind = XPR_COMMA; | |
8194 | ret->edata = exprData_makePair (e1, e2); | |
8195 | ||
8196 | if (exprNode_isDefined (e1)) | |
8197 | { | |
8198 | if (exprNode_isDefined (e2)) | |
8199 | { | |
8200 | ret->typ = e2->typ; | |
8201 | ||
8202 | if (exprNode_mustEscape (e1) || e1->mustBreak) | |
8203 | { | |
8204 | voptgenerror | |
8205 | (FLG_UNREACHABLE, | |
8206 | message ("Second clause of comma expression is unreachable: %s", | |
8207 | exprNode_unparse (e2)), | |
8208 | exprNode_loc (e2)); | |
8209 | } | |
8210 | ||
8211 | ret->exitCode = exitkind_combine (e1->exitCode, e2->exitCode); | |
8212 | ret->mustBreak = e1->mustBreak || e2->mustBreak; | |
8213 | ret->canBreak = e1->canBreak || e2->canBreak; | |
8214 | } | |
8215 | else | |
8216 | { | |
8217 | if (exprNode_mustEscape (e1) || e1->mustBreak) | |
8218 | { | |
8219 | voptgenerror | |
8220 | (FLG_UNREACHABLE, | |
8221 | message ("Second clause of comma expression is unreachable: %s", | |
8222 | exprNode_unparse (e2)), | |
8223 | exprNode_loc (e2)); | |
8224 | } | |
8225 | ||
8226 | ret->exitCode = e1->exitCode; | |
8227 | ret->canBreak = e1->canBreak; | |
8228 | } | |
8229 | } | |
8230 | else | |
8231 | { | |
8232 | if (exprNode_isDefined (e2)) | |
8233 | { | |
8234 | ret->exitCode = e2->exitCode; | |
8235 | ret->mustBreak = e2->mustBreak; | |
8236 | ret->canBreak = e2->canBreak; | |
8237 | } | |
8238 | } | |
8239 | ||
8240 | return (ret); | |
8241 | } | |
8242 | ||
8243 | static bool exprNode_checkOneInit (/*@notnull@*/ exprNode el, exprNode val) | |
8244 | { | |
8245 | ctype t1 = exprNode_getType (el); | |
8246 | ctype t2 = exprNode_getType (val); | |
8247 | bool hasError = FALSE; | |
8248 | ||
8249 | DPRINTF (("Check one init: %s / %s", | |
8250 | exprNode_unparse (el), | |
8251 | exprNode_unparse (val))); | |
8252 | ||
8253 | if (ctype_isUnknown (t1)) | |
8254 | { | |
8255 | voptgenerror (FLG_IMPTYPE, | |
8256 | message ("Variable has unknown (implicitly int) type: %s", | |
8257 | exprNode_unparse (el)), | |
8258 | el->loc); | |
8259 | ||
8260 | t1 = ctype_int; | |
8261 | el->typ = ctype_int; | |
8262 | } | |
8263 | ||
8264 | if (exprNode_isDefined (val) && val->kind == XPR_INITBLOCK) | |
8265 | { | |
8266 | exprNodeList vals = exprData_getArgs (val->edata); | |
8267 | ||
8268 | DPRINTF (("Check one init: %s", exprNodeList_unparse (vals))); | |
8269 | DPRINTF (("Type: %s", ctype_unparse (t1))); | |
8270 | ||
8271 | if (ctype_isRealAP (t1)) | |
8272 | { | |
8273 | int i = 0; | |
8274 | int nerrors = 0; | |
8275 | ||
8276 | if (ctype_isFixedArray (t1)) | |
8277 | { | |
8278 | size_t nelements = ctype_getArraySize (t1); | |
8279 | ||
8280 | DPRINTF (("Checked array: %s / %d", | |
8281 | ctype_unparse (t1), nelements)); | |
8282 | ||
8283 | if (exprNode_isStringLiteral (val)) | |
8284 | { | |
8285 | exprNode_checkStringLiteralLength (t1, val); | |
8286 | } | |
8287 | else | |
8288 | { | |
8289 | if (exprNodeList_size (vals) != size_toInt (nelements)) | |
8290 | { | |
8291 | hasError = optgenerror | |
8292 | (exprNodeList_size (vals) > size_toInt (nelements) | |
8293 | ? FLG_INITSIZE : FLG_INITALLELEMENTS, | |
8294 | message ("Initializer block for " | |
8295 | "%s has %d element%&, but declared as %s: %q", | |
8296 | exprNode_unparse (el), | |
8297 | exprNodeList_size (vals), | |
8298 | ctype_unparse (t1), | |
8299 | exprNodeList_unparse (vals)), | |
8300 | val->loc); | |
8301 | } | |
8302 | } | |
8303 | } | |
8304 | ||
8305 | exprNodeList_elements (vals, oneval) | |
8306 | { | |
8307 | cstring istring = message ("%d", i); | |
8308 | exprNode newel = | |
8309 | exprNode_arrayFetch | |
8310 | (exprNode_fakeCopy (el), | |
8311 | exprNode_numLiteral (ctype_int, istring, | |
8312 | fileloc_copy (el->loc), i)); | |
8313 | ||
8314 | if (exprNode_isDefined (newel)) | |
8315 | { | |
8316 | if (exprNodeList_size (vals) == 1 | |
8317 | && ctype_isString (exprNode_getType (oneval)) | |
8318 | && ctype_isChar (exprNode_getType (newel))) | |
8319 | { | |
8320 | exprNode_freeIniter (newel); | |
8321 | } | |
8322 | else | |
8323 | { | |
8324 | if (exprNode_checkOneInit (newel, oneval)) | |
8325 | { | |
8326 | hasError = TRUE; | |
8327 | nerrors++; | |
8328 | ||
8329 | if (nerrors > 3 && exprNodeList_size (vals) > 6) | |
8330 | { | |
8331 | llgenmsg | |
8332 | (message ("Additional initialization errors " | |
8333 | "for %s not reported", | |
8334 | exprNode_unparse (el)), | |
8335 | exprNode_loc (el)); | |
8336 | exprNode_freeIniter (newel); | |
8337 | break; | |
8338 | } | |
8339 | else | |
8340 | { | |
8341 | exprNode_freeIniter (newel); | |
8342 | } | |
8343 | } | |
8344 | else | |
8345 | { | |
8346 | exprNode_freeIniter (newel); | |
8347 | } | |
8348 | } | |
8349 | } | |
8350 | ||
8351 | cstring_free (istring); | |
8352 | i++; | |
8353 | /*@-branchstate@*/ | |
8354 | } end_exprNodeList_elements; | |
8355 | /*@=branchstate@*/ | |
8356 | } | |
8357 | else if (ctype_isStruct (ctype_realType (t1))) | |
8358 | { | |
8359 | uentryList fields = ctype_getFields (t1); | |
8360 | int i = 0; | |
8361 | ||
8362 | if (uentryList_size (fields) != exprNodeList_size (vals)) | |
8363 | { | |
8364 | if (uentryList_size (fields) > exprNodeList_size (vals)) | |
8365 | { | |
8366 | hasError = optgenerror | |
8367 | (FLG_FULLINITBLOCK, | |
8368 | message ("Initializer block for " | |
8369 | "%s has %d field%&, but %s has %d field%&: %q", | |
8370 | exprNode_unparse (el), | |
8371 | exprNodeList_size (vals), | |
8372 | ctype_unparse (t1), | |
8373 | uentryList_size (fields), | |
8374 | exprNodeList_unparse (vals)), | |
8375 | val->loc); | |
8376 | } | |
8377 | else | |
8378 | { | |
8379 | hasError = optgenerror | |
8380 | (FLG_TYPE, | |
8381 | message ("Initializer block for " | |
8382 | "%s has %d field%&, but %s has %d field%&: %q", | |
8383 | exprNode_unparse (el), | |
8384 | exprNodeList_size (vals), | |
8385 | ctype_unparse (t1), | |
8386 | uentryList_size (fields), | |
8387 | exprNodeList_unparse (vals)), | |
8388 | val->loc); | |
8389 | } | |
8390 | } | |
8391 | else | |
8392 | { | |
8393 | exprNodeList_elements (vals, oneval) | |
8394 | { | |
8395 | uentry thisfield = uentryList_getN (fields, i); | |
8396 | exprNode newel = | |
8397 | exprNode_fieldAccessAux (exprNode_fakeCopy (el), | |
8398 | exprNode_loc (el), | |
8399 | uentry_getName (thisfield)); | |
8400 | ||
8401 | if (exprNode_isDefined (newel)) | |
8402 | { | |
8403 | if (exprNode_checkOneInit (newel, oneval)) | |
8404 | { | |
8405 | hasError = TRUE; | |
8406 | } | |
8407 | ||
8408 | exprNode_freeIniter (newel); | |
8409 | } | |
8410 | ||
8411 | i++; | |
8412 | } end_exprNodeList_elements; | |
8413 | } | |
8414 | } | |
8415 | /* evans 2001-12-30: added to fix bug reported by Jim Zelenka */ | |
8416 | else if (ctype_isUnion (ctype_realType (t1))) | |
8417 | { | |
8418 | uentryList fields = ctype_getFields (t1); | |
8419 | int i = 0; | |
8420 | ||
8421 | /* | |
8422 | ** Union initializers set the first member always. | |
8423 | */ | |
8424 | ||
8425 | DPRINTF (("Union initializer: %s / %s", | |
8426 | exprNode_unparse (el), ctype_unparse (ctype_realType (t1)))); | |
8427 | ||
8428 | if (exprNodeList_size (vals) != 1) | |
8429 | { | |
8430 | hasError = optgenerror | |
8431 | (FLG_TYPE, | |
8432 | message ("Initializer block for union " | |
8433 | "%s has %d elements, union initializers should have one element: %q", | |
8434 | exprNode_unparse (el), | |
8435 | exprNodeList_size (vals), | |
8436 | exprNodeList_unparse (vals)), | |
8437 | val->loc); | |
8438 | } | |
8439 | else | |
8440 | { | |
8441 | exprNode oneval = exprNodeList_head (vals); | |
8442 | uentry thisfield = uentryList_getN (fields, i); | |
8443 | exprNode newel = | |
8444 | exprNode_fieldAccessAux (exprNode_fakeCopy (el), | |
8445 | exprNode_loc (el), | |
8446 | uentry_getName (thisfield)); | |
8447 | ||
8448 | if (exprNode_isDefined (newel)) | |
8449 | { | |
8450 | if (exprNode_checkOneInit (newel, oneval)) | |
8451 | { | |
8452 | hasError = TRUE; | |
8453 | } | |
8454 | ||
8455 | exprNode_freeIniter (newel); | |
8456 | } | |
8457 | } | |
8458 | } | |
8459 | else | |
8460 | { | |
8461 | hasError = optgenerror | |
8462 | (FLG_TYPE, | |
8463 | message ("Initializer block used for " | |
8464 | "%s where %t is expected: %s", | |
8465 | exprNode_unparse (el), t1, exprNode_unparse (val)), | |
8466 | val->loc); | |
8467 | } | |
8468 | } | |
8469 | else | |
8470 | { | |
8471 | if (exprNode_isDefined (val)) | |
8472 | { | |
8473 | doAssign (el, val, TRUE); | |
8474 | ||
8475 | if (!exprNode_matchType (t1, val)) | |
8476 | { | |
8477 | hasError = gentypeerror | |
8478 | (t1, val, t2, el, | |
8479 | message ("Initial value of %s is type %t, " | |
8480 | "expects %t: %s", | |
8481 | exprNode_unparse (el), | |
8482 | t2, t1, exprNode_unparse (val)), | |
8483 | val->loc); | |
8484 | } | |
8485 | } | |
8486 | } | |
8487 | ||
8488 | return hasError; | |
8489 | } | |
8490 | ||
8491 | static /*@notnull@*/ exprNode | |
8492 | exprNode_makeInitializationAux (/*@temp@*/ idDecl t) | |
8493 | { | |
8494 | exprNode ret; | |
8495 | ||
8496 | DPRINTF (("Initialization: %s", idDecl_unparse (t))); | |
8497 | ||
8498 | if (usymtab_exists (idDecl_observeId (t))) | |
8499 | { | |
8500 | uentry ue = usymtab_lookup (idDecl_observeId (t)); | |
8501 | ret = exprNode_createId (ue); | |
8502 | } | |
8503 | else | |
8504 | { | |
8505 | uentry ue; | |
8506 | ||
8507 | DPRINTF (("Unrecognized: %s", idDecl_unparse (t))); | |
8508 | ||
8509 | ue = uentry_makeUnrecognized (idDecl_observeId (t), fileloc_copy (g_currentloc)); | |
8510 | ret = exprNode_fromIdentifierAux (ue); | |
8511 | ||
8512 | /* | |
8513 | ** No error - this happens in old style declarations: | |
8514 | ||
8515 | voptgenerror | |
8516 | (FLG_UNRECOG, | |
8517 | message ("Unrecognized identifier in intializer: %s", idDecl_observeId (t)), | |
8518 | g_currentloc); | |
8519 | ||
8520 | ** | |
8521 | */ | |
8522 | } | |
8523 | ||
8524 | exprData_free (ret->edata, ret->kind); | |
8525 | ret->edata = exprData_undefined; | |
8526 | ret->exitCode = XK_NEVERESCAPE; | |
8527 | ret->mustBreak = FALSE; | |
8528 | ret->kind = XPR_INIT; | |
8529 | return ret; | |
8530 | } | |
8531 | ||
8532 | exprNode exprNode_makeEmptyInitialization (/*@only@*/ idDecl t) | |
8533 | { | |
8534 | exprNode ret = exprNode_makeInitializationAux (t); | |
8535 | llassert (ret->edata == exprData_undefined); | |
8536 | ret->edata = exprData_makeInit (t, exprNode_undefined); | |
8537 | return ret; | |
8538 | } | |
8539 | ||
8540 | exprNode exprNode_makeInitialization (/*@only@*/ idDecl t, | |
8541 | /*@only@*/ exprNode e) | |
8542 | { | |
8543 | uentry ue = usymtab_lookup (idDecl_observeId (t)); | |
8544 | exprNode ret = exprNode_makeInitializationAux (t); | |
8545 | fileloc loc = exprNode_loc (e); | |
8546 | ||
8547 | DPRINTF (("initialization: %s = %s", idDecl_unparse (t), exprNode_unparse (e))); | |
8548 | ||
8549 | if (exprNode_isError (e)) | |
8550 | { | |
8551 | e = exprNode_createUnknown (); | |
8552 | /* error: assume initializer is defined */ | |
8553 | sRef_setDefined (ret->sref, g_currentloc); | |
8554 | ret->edata = exprData_makeInit (t, e); | |
8555 | } | |
8556 | else | |
8557 | { | |
8558 | ctype ct = ctype_realishType (ret->typ); | |
8559 | ||
8560 | /* | |
8561 | ** evs - 9 Apr 1995 | |
8562 | ** | |
8563 | ** was addSafeUse --- what's the problem? | |
8564 | ** | |
8565 | ** int x = 3, y = x ? | |
8566 | */ | |
8567 | ||
8568 | exprData_free (ret->edata, ret->kind); | |
8569 | ret->edata = exprData_makeInit (t, e); | |
8570 | DPRINTF (("ret: %s", exprNode_unparse (ret))); | |
8571 | ||
8572 | exprNode_checkUse (ret, e->sref, e->loc); | |
8573 | ||
8574 | if (ctype_isUnknown (e->typ) && uentry_isValid (ue)) | |
8575 | { | |
8576 | exprNode lhs = exprNode_createId (ue); | |
8577 | ||
8578 | /* | |
8579 | ** static storage should be undefined before initializing | |
8580 | */ | |
8581 | ||
8582 | if (uentry_isStatic (ue)) | |
8583 | { | |
8584 | sRef_setDefState (lhs->sref, SS_PARTIAL, fileloc_undefined); | |
8585 | } | |
8586 | ||
8587 | (void) exprNode_checkOneInit (lhs, e); | |
8588 | ||
8589 | if (uentry_isStatic (ue)) | |
8590 | { | |
8591 | sRef_setDefState (lhs->sref, SS_DEFINED, fileloc_undefined); | |
8592 | } | |
8593 | ||
8594 | exprNode_free (lhs); | |
8595 | } | |
8596 | else | |
8597 | { | |
8598 | if (!exprNode_matchType (ct, e)) | |
8599 | { | |
8600 | if (exprNode_isZero (e) && ctype_isArrayPtr (ct)) | |
8601 | { | |
8602 | ; | |
8603 | } | |
8604 | else | |
8605 | { | |
8606 | (void) gentypeerror | |
8607 | (exprNode_getType (e), e, exprNode_getType (ret), ret, | |
8608 | message | |
8609 | ("Variable %q initialized to type %t, expects %t: %s", | |
8610 | uentry_getName (ue), exprNode_getType (e), | |
8611 | exprNode_getType (ret), | |
8612 | exprNode_unparse (e)), | |
8613 | e->loc); | |
8614 | } | |
8615 | } | |
8616 | } | |
8617 | ||
8618 | if (uentry_isStatic (ue)) | |
8619 | { | |
8620 | sRef_setDefState (ret->sref, SS_PARTIAL, fileloc_undefined); | |
8621 | } | |
8622 | ||
8623 | if (exprNode_isStringLiteral (e) | |
8624 | && (ctype_isArray (ct)) | |
8625 | && (ctype_isChar (ctype_realType (ctype_baseArrayPtr (ct))))) | |
8626 | { | |
8627 | /* | |
8628 | ** If t is a char [], the literal is copied. | |
8629 | */ | |
8630 | ||
8631 | exprNode_checkStringLiteralLength (ct, e); | |
8632 | sRef_setDefState (ret->sref, SS_DEFINED, e->loc); | |
8633 | ret->val = multiVal_copy (e->val); | |
8634 | ||
8635 | sRef_setNullTerminatedState (ret->sref); | |
8636 | ||
8637 | if (multiVal_isDefined (e->val)) | |
8638 | { | |
8639 | cstring slit = multiVal_forceString (e->val); | |
8640 | sRef_setLen (ret->sref, size_toInt (cstring_length (slit) + 1)); | |
8641 | } | |
8642 | ||
8643 | if (ctype_isFixedArray (ct)) | |
8644 | { | |
8645 | sRef_setSize (ret->sref, size_toInt (ctype_getArraySize (ct))); | |
8646 | } | |
8647 | } | |
8648 | else | |
8649 | { | |
8650 | doAssign (ret, e, TRUE); | |
8651 | } | |
8652 | ||
8653 | if (uentry_isStatic (ue)) | |
8654 | { | |
8655 | sRef_setDefState (ret->sref, SS_DEFINED, fileloc_undefined); | |
8656 | } | |
8657 | } | |
8658 | ||
8659 | if (context_inIterDef ()) | |
8660 | { | |
8661 | /* should check if it is yield */ | |
8662 | uentry_setUsed (ue, loc); | |
8663 | } | |
8664 | else | |
8665 | { | |
8666 | ; | |
8667 | } | |
8668 | ||
8669 | exprNode_mergeUSs (ret, e); | |
8670 | DPRINTF (("Ret: %s %p %p", | |
8671 | exprNode_unparse (ret), | |
8672 | ret->requiresConstraints, | |
8673 | ret->ensuresConstraints)); | |
8674 | ||
8675 | DPRINTF (("Ret: %s %s %s", | |
8676 | exprNode_unparse (ret), | |
8677 | constraintList_unparse (ret->requiresConstraints), | |
8678 | constraintList_unparse (ret->ensuresConstraints))); | |
8679 | return ret; | |
8680 | } | |
8681 | ||
8682 | exprNode exprNode_iter (/*@observer@*/ uentry name, | |
8683 | /*@only@*/ exprNodeList alist, | |
8684 | /*@only@*/ exprNode body, | |
8685 | /*@observer@*/ uentry end) | |
8686 | { | |
8687 | exprNode ret; | |
8688 | cstring iname; | |
8689 | ||
8690 | llassert (uentry_isValid (name)); | |
8691 | ||
8692 | uentry_setUsed (name, exprNode_loc (body)); | |
8693 | ||
8694 | ret = exprNode_createPartialCopy (body); | |
8695 | iname = uentry_getName (name); | |
8696 | ||
8697 | if (uentry_isInvalid (end)) | |
8698 | { | |
8699 | llerror (FLG_ITERBALANCE, | |
8700 | message ("Iter %s not balanced with end_%s", iname, iname)); | |
8701 | } | |
8702 | else | |
8703 | { | |
8704 | cstring ename = uentry_getName (end); | |
8705 | ||
8706 | if (!cstring_equalPrefixLit (ename, "end_")) | |
8707 | { | |
8708 | llerror (FLG_ITERBALANCE, message ("Iter %s not balanced with end_%s: %s", | |
8709 | iname, iname, ename)); | |
8710 | } | |
8711 | else | |
8712 | { | |
8713 | if (!cstring_equal (iname, cstring_suffix (ename, 4))) | |
8714 | { | |
8715 | llerror (FLG_ITERBALANCE, | |
8716 | message ("Iter %s not balanced with end_%s: %s", | |
8717 | iname, iname, ename)); | |
8718 | } | |
8719 | } | |
8720 | ||
8721 | cstring_free (ename); | |
8722 | } | |
8723 | ||
8724 | context_exitIterClause (body); | |
8725 | ||
8726 | ret->kind = XPR_ITER; | |
8727 | ret->edata = exprData_makeIter (name, alist, body, end); | |
8728 | ||
8729 | if (uentry_isIter (name)) | |
8730 | { | |
8731 | (void) checkArgsReal (name, body, | |
8732 | uentry_getParams (name), alist, TRUE, ret); | |
8733 | } | |
8734 | ||
8735 | cstring_free (iname); | |
8736 | ||
8737 | return ret; | |
8738 | } | |
8739 | ||
8740 | exprNode | |
8741 | exprNode_iterNewId (/*@only@*/ cstring s) | |
8742 | { | |
8743 | exprNode e = exprNode_new (); | |
8744 | uentry ue = uentryList_getN (uentry_getParams (getCurrentIter ()), iterParamNo ()); | |
8745 | ||
8746 | llassert (processingIterVars ()); | |
8747 | ||
8748 | e->loc = context_getSaveLocation (); | |
8749 | ||
8750 | if (fileloc_isUndefined (e->loc)) | |
8751 | { | |
8752 | fileloc_free (e->loc); | |
8753 | e->loc = fileloc_copy (g_currentloc); | |
8754 | } | |
8755 | ||
8756 | e->uses = sRefSet_new (); | |
8757 | e->sets = sRefSet_new (); | |
8758 | e->msets = sRefSet_new (); | |
8759 | e->kind = XPR_VAR; | |
8760 | e->val = multiVal_unknown (); | |
8761 | e->guards = guardSet_new (); | |
8762 | e->sref = sRef_undefined; | |
8763 | e->isJumpPoint = FALSE; | |
8764 | e->exitCode = XK_NEVERESCAPE; | |
8765 | ||
8766 | /*> missing fields, detected by splint <*/ | |
8767 | e->canBreak = FALSE; | |
8768 | e->mustBreak = FALSE; | |
8769 | e->etext = cstring_undefined; | |
8770 | ||
8771 | if (uentry_isYield (ue)) | |
8772 | { | |
8773 | uentry uue = uentry_makeVariable (s, uentry_getType (ue), | |
8774 | fileloc_copy (e->loc), | |
8775 | FALSE); | |
8776 | sRef sr; | |
8777 | ||
8778 | uue = usymtab_supEntrySrefReturn (uue); | |
8779 | ||
8780 | sr = uentry_getSref (uue); | |
8781 | sRef_mergeStateQuiet (sr, uentry_getSref (ue)); | |
8782 | sr = uentry_getSref (uue); | |
8783 | sRef_setDefined (sr, e->loc); | |
8784 | ||
8785 | e->typ = uentry_getType (uue); | |
8786 | e->sref = sr; | |
8787 | e->edata = exprData_makeId (uue); | |
8788 | uentry_setUsed (uue, g_currentloc); | |
8789 | } | |
8790 | else | |
8791 | { | |
8792 | uentry uue; | |
8793 | ||
8794 | sRef_setGlobalScope (); | |
8795 | uue = uentry_makeVariableLoc (s, ctype_unknown); | |
8796 | ||
8797 | e->typ = ctype_unknown; | |
8798 | e->edata = exprData_makeId (uue); | |
8799 | ||
8800 | uentry_setUsed (uue, e->loc); | |
8801 | uentry_setHasNameError (uue); | |
8802 | ||
8803 | if (context_getFlag (FLG_REPEATUNRECOG)) | |
8804 | { | |
8805 | uentry_markOwned (uue); | |
8806 | } | |
8807 | else | |
8808 | { | |
8809 | usymtab_supGlobalEntry (uue); | |
8810 | } | |
8811 | ||
8812 | sRef_clearGlobalScope (); | |
8813 | ||
8814 | voptgenerror (FLG_UNRECOG, message ("Unrecognized identifier: %s", s), | |
8815 | e->loc); | |
8816 | } | |
8817 | ||
8818 | ||
8819 | cstring_free (s); | |
8820 | ||
8821 | exprNode_defineConstraints(e); | |
8822 | return (e); | |
8823 | } | |
8824 | ||
8825 | exprNode | |
8826 | exprNode_iterExpr (/*@returned@*/ exprNode e) | |
8827 | { | |
8828 | if (!processingIterVars ()) | |
8829 | { | |
8830 | llcontbuglit ("checkIterParam: not in iter"); | |
8831 | return e; | |
8832 | } | |
8833 | ||
8834 | if (uentry_isYield (uentryList_getN (uentry_getParams (getCurrentIter ()), | |
8835 | iterParamNo ()))) | |
8836 | { | |
8837 | if (exprNode_isDefined (e)) | |
8838 | { | |
8839 | if (fileloc_isDefined (e->loc)) | |
8840 | { | |
8841 | voptgenerror | |
8842 | (FLG_ITERYIELD, | |
8843 | message ("Yield parameter is not simple identifier: %s", | |
8844 | exprNode_unparse (e)), | |
8845 | e->loc); | |
8846 | } | |
8847 | else | |
8848 | { | |
8849 | voptgenerror | |
8850 | (FLG_ITERYIELD, | |
8851 | message ("Yield parameter is not simple identifier: %s", | |
8852 | exprNode_unparse (e)), | |
8853 | g_currentloc); | |
8854 | ||
8855 | } | |
8856 | } | |
8857 | } | |
8858 | return e; | |
8859 | } | |
8860 | ||
8861 | exprNode | |
8862 | exprNode_iterId (/*@observer@*/ uentry c) | |
8863 | { | |
8864 | uentry ue; | |
8865 | ||
8866 | llassert (processingIterVars ()); | |
8867 | ||
8868 | ue = uentryList_getN (uentry_getParams (getCurrentIter ()), | |
8869 | iterParamNo ()); | |
8870 | ||
8871 | if (uentry_isYield (ue)) | |
8872 | { | |
8873 | ctype ct = uentry_getType (ue); | |
8874 | exprNode e = exprNode_createPlain (ct); | |
8875 | cstring name = uentry_getName (c); | |
8876 | uentry le = uentry_makeVariable (name, ct, fileloc_undefined, FALSE); | |
8877 | ||
8878 | uentry_setUsed (ue, g_currentloc); | |
8879 | uentry_setHasNameError (ue); | |
8880 | ||
8881 | cstring_free (name); | |
8882 | ||
8883 | e->kind = XPR_VAR; | |
8884 | e->edata = exprData_makeId (le); | |
8885 | e->loc = context_getSaveLocation (); | |
8886 | e->sref = uentry_getSref (le); | |
8887 | ||
8888 | usymtab_supEntrySref (le); | |
8889 | ||
8890 | if (!context_inHeader ()) | |
8891 | { | |
8892 | if (optgenerror | |
8893 | (FLG_ITERYIELD, | |
8894 | message ("Yield parameter shadows local declaration: %q", | |
8895 | uentry_getName (c)), | |
8896 | fileloc_isDefined (e->loc) ? e->loc : g_currentloc)) | |
8897 | { | |
8898 | uentry_showWhereDeclared (c); | |
8899 | } | |
8900 | } | |
8901 | ||
8902 | return e; | |
8903 | } | |
8904 | ||
8905 | return (exprNode_fromIdentifierAux (c)); | |
8906 | } | |
8907 | ||
8908 | exprNode exprNode_iterStart (/*@observer@*/ uentry name, /*@only@*/ exprNodeList alist) | |
8909 | { | |
8910 | exprNode ret = exprNode_create (ctype_unknown); | |
8911 | ||
8912 | ret->kind = XPR_ITERCALL; | |
8913 | ret->edata = exprData_makeIterCall (name, alist); | |
8914 | ||
8915 | if (uentry_isIter (name)) | |
8916 | { | |
8917 | uentryList params = uentry_getParams (name); | |
8918 | ||
8919 | if (context_inIterDef () | |
8920 | && uentryList_size (params) == exprNodeList_size (alist)) | |
8921 | { | |
8922 | int i = 0; | |
8923 | ||
8924 | exprNodeList_elements (alist, arg) | |
8925 | { | |
8926 | uentry parg = uentryList_getN (params, i); | |
8927 | ||
8928 | if (uentry_isYield (parg)) | |
8929 | { | |
8930 | uentry ue = exprNode_getUentry (arg); | |
8931 | ||
8932 | if (uentry_isValid (ue)) | |
8933 | { | |
8934 | ; | |
8935 | } | |
8936 | } | |
8937 | ||
8938 | i++; | |
8939 | } end_exprNodeList_elements; | |
8940 | } | |
8941 | ||
8942 | (void) checkArgsReal (name, ret, params, alist, TRUE, ret); | |
8943 | checkUnspecCall (ret, params, alist); | |
8944 | } | |
8945 | ||
8946 | return ret; | |
8947 | } | |
8948 | ||
8949 | /*@exposed@*/ sRef exprNode_getSref (exprNode e) | |
8950 | { | |
8951 | if (exprNode_isDefined (e)) | |
8952 | { | |
8953 | if (sRef_isInvalid (e->sref)) | |
8954 | { | |
8955 | /*@-mods@*/ | |
8956 | e->sref = sRef_makeUnknown (); | |
8957 | sRef_setAliasKind (e->sref, AK_ERROR, fileloc_undefined); | |
8958 | /*@=mods@*/ | |
8959 | return e->sref; | |
8960 | } | |
8961 | else | |
8962 | { | |
8963 | return e->sref; | |
8964 | } | |
8965 | } | |
8966 | else | |
8967 | { | |
8968 | return sRef_undefined; | |
8969 | } | |
8970 | } | |
8971 | ||
8972 | /*@observer@*/ cstring | |
8973 | exprNode_unparseFirst (exprNode e) | |
8974 | { | |
8975 | if (exprNode_isDefined (e)) | |
8976 | { | |
8977 | cstring ret; | |
8978 | ||
8979 | if (e->kind == XPR_STMTLIST | |
8980 | || e->kind == XPR_COMMA || e->kind == XPR_COND) | |
8981 | { | |
8982 | exprNode first = exprData_getPairA (e->edata); | |
8983 | ||
8984 | if (exprNode_isDefined (first)) | |
8985 | { | |
8986 | return (exprNode_unparseFirst (exprData_getPairA (e->edata))); | |
8987 | } | |
8988 | else | |
8989 | { | |
8990 | return (cstring_makeLiteralTemp ("...")); | |
8991 | } | |
8992 | } | |
8993 | ||
8994 | ret = cstring_elide (exprNode_unparse (e), 20); | |
8995 | cstring_markOwned (ret); | |
8996 | ||
8997 | return (ret); | |
8998 | } | |
8999 | else | |
9000 | { | |
9001 | return cstring_makeLiteralTemp ("<error>"); | |
9002 | } | |
9003 | } | |
9004 | ||
9005 | /*@observer@*/ cstring | |
9006 | exprNode_unparse (/*@temp@*/ exprNode e) | |
9007 | { | |
9008 | if (exprNode_isError (e)) | |
9009 | { | |
9010 | return cstring_makeLiteralTemp ("<error>"); | |
9011 | } | |
9012 | ||
9013 | if (cstring_isDefined (e->etext)) | |
9014 | { | |
9015 | return e->etext; | |
9016 | } | |
9017 | else | |
9018 | { | |
9019 | cstring ret = exprNode_doUnparse (e); | |
9020 | ||
9021 | /*@-modifies@*/ /* benevolent */ | |
9022 | e->etext = ret; | |
9023 | /*@=modifies@*/ | |
9024 | return ret; | |
9025 | } | |
9026 | } | |
9027 | ||
9028 | /*@observer@*/ fileloc | |
9029 | exprNode_loc (exprNode e) | |
9030 | { | |
9031 | if (exprNode_isError (e)) | |
9032 | { | |
9033 | return (g_currentloc); | |
9034 | } | |
9035 | else | |
9036 | { | |
9037 | return (e->loc); | |
9038 | } | |
9039 | } | |
9040 | ||
9041 | /* | |
9042 | ** executes exprNode e | |
9043 | ** recursively rexecutes as though in original parse using | |
9044 | ** information in e->edata | |
9045 | */ | |
9046 | ||
9047 | static /*@only@*/ exprNodeList exprNodeList_effect (exprNodeList e) | |
9048 | { | |
9049 | exprNodeList ret = exprNodeList_new (); | |
9050 | ||
9051 | exprNodeList_elements (e, current) | |
9052 | { | |
9053 | exprNodeList_addh (ret, exprNode_effect (current)); | |
9054 | } end_exprNodeList_elements; | |
9055 | ||
9056 | return ret; | |
9057 | } | |
9058 | ||
9059 | static /*@only@*/ exprNode exprNode_effect (exprNode e) | |
9060 | /*@globals internalState@*/ | |
9061 | { | |
9062 | bool innerEffect = inEffect; | |
9063 | exprNode ret; | |
9064 | exprData data; | |
9065 | ||
9066 | inEffect = TRUE; | |
9067 | ||
9068 | context_clearJustPopped (); | |
9069 | ||
9070 | if (exprNode_isError (e)) | |
9071 | { | |
9072 | ret = exprNode_undefined; | |
9073 | } | |
9074 | else | |
9075 | { | |
9076 | /* | |
9077 | ** Turn off expose and dependent transfer checking. | |
9078 | ** Need to pass exposed internal nodes, | |
9079 | ** [ copying would be a waste! ] | |
9080 | ** [ Actually, I think I wasted a lot more time than its worth ] | |
9081 | ** [ trying to do this. ] | |
9082 | */ | |
9083 | ||
9084 | /*@-exposetrans@*/ | |
9085 | /*@-observertrans@*/ | |
9086 | /*@-dependenttrans@*/ | |
9087 | ||
9088 | data = e->edata; | |
9089 | ||
9090 | switch (e->kind) | |
9091 | { | |
9092 | case XPR_PARENS: | |
9093 | ret = exprNode_addParens (exprData_getUopTok (data), | |
9094 | exprNode_effect (exprData_getUopNode (data))); | |
9095 | break; | |
9096 | case XPR_ASSIGN: | |
9097 | ret = exprNode_assign (exprNode_effect (exprData_getOpA (data)), | |
9098 | exprNode_effect (exprData_getOpB (data)), | |
9099 | exprData_getOpTok (data)); | |
9100 | break; | |
9101 | case XPR_INITBLOCK: | |
9102 | ret = exprNode_undefined; | |
9103 | break; | |
9104 | case XPR_CALL: | |
9105 | ret = exprNode_functionCall (exprNode_effect (exprData_getFcn (data)), | |
9106 | exprNodeList_effect (exprData_getArgs (data))); | |
9107 | break; | |
9108 | case XPR_EMPTY: | |
9109 | ret = e; | |
9110 | break; | |
9111 | ||
9112 | case XPR_LABEL: | |
9113 | ret = e; | |
9114 | break; | |
9115 | ||
9116 | case XPR_CONST: | |
9117 | case XPR_VAR: | |
9118 | { | |
9119 | cstring id = exprData_getId (data); | |
9120 | uentry ue = usymtab_lookupSafe (id); | |
9121 | ||
9122 | ret = exprNode_fromIdentifierAux (ue); | |
9123 | ret->loc = fileloc_update (ret->loc, e->loc); | |
9124 | break; | |
9125 | } | |
9126 | case XPR_BODY: | |
9127 | ret = e; | |
9128 | break; | |
9129 | case XPR_FETCH: | |
9130 | ret = exprNode_arrayFetch (exprNode_effect (exprData_getPairA (data)), | |
9131 | exprNode_effect (exprData_getPairB (data))); | |
9132 | break; | |
9133 | case XPR_OP: | |
9134 | /* | |
9135 | ** evans 2002-03-15: for && and ||, need to do the guards also | |
9136 | ** this is what cgrammar.y does - should be | |
9137 | ** able to avoid duplication, but need to | |
9138 | ** time with grammar productions. | |
9139 | */ | |
9140 | ||
9141 | DPRINTF (("Effect: %s", exprNode_unparse (e))); | |
9142 | ||
9143 | if (lltok_getTok (exprData_getOpTok (data)) == AND_OP) | |
9144 | { | |
9145 | exprNode e1 = exprNode_effect (exprData_getOpA (data)); | |
9146 | exprNode e2; | |
9147 | exprNode_produceGuards (e1); | |
9148 | context_enterAndClause (e1); | |
9149 | e2 = exprNode_effect (exprData_getOpB (data)); | |
9150 | ||
9151 | ret = exprNode_op (e1, e2, | |
9152 | exprData_getOpTok (data)); | |
9153 | ||
9154 | context_exitAndClause (ret, e2); | |
9155 | } | |
9156 | else if (lltok_getTok (exprData_getOpTok (data)) == OR_OP) | |
9157 | { | |
9158 | exprNode e1 = exprNode_effect (exprData_getOpA (data)); | |
9159 | exprNode e2; | |
9160 | exprNode_produceGuards (e1); | |
9161 | context_enterOrClause (e1); | |
9162 | e2 = exprNode_effect (exprData_getOpB (data)); | |
9163 | ||
9164 | ret = exprNode_op (e1, e2, | |
9165 | exprData_getOpTok (data)); | |
9166 | ||
9167 | context_exitOrClause (ret, e2); | |
9168 | } | |
9169 | else | |
9170 | { | |
9171 | ret = exprNode_op (exprNode_effect (exprData_getOpA (data)), | |
9172 | exprNode_effect (exprData_getOpB (data)), | |
9173 | exprData_getOpTok (data)); | |
9174 | } | |
9175 | break; | |
9176 | ||
9177 | case XPR_POSTOP: | |
9178 | ret = exprNode_postOp (exprNode_effect (exprData_getUopNode (data)), | |
9179 | exprData_getUopTok (data)); | |
9180 | break; | |
9181 | case XPR_PREOP: | |
9182 | ret = exprNode_preOp (exprNode_effect (exprData_getUopNode (data)), | |
9183 | exprData_getUopTok (data)); | |
9184 | break; | |
9185 | ||
9186 | case XPR_OFFSETOF: | |
9187 | case XPR_SIZEOFT: | |
9188 | case XPR_SIZEOF: | |
9189 | case XPR_ALIGNOFT: | |
9190 | case XPR_ALIGNOF: | |
9191 | ret = e; | |
9192 | break; | |
9193 | ||
9194 | case XPR_VAARG: | |
9195 | ret = exprNode_vaArg (exprData_getCastTok (data), | |
9196 | exprNode_effect (exprData_getCastNode (data)), | |
9197 | exprData_getCastType (data)); | |
9198 | break; | |
9199 | ||
9200 | case XPR_CAST: | |
9201 | ret = exprNode_cast (exprData_getCastTok (data), | |
9202 | exprNode_effect (exprData_getCastNode (data)), | |
9203 | exprData_getCastType (data)); | |
9204 | break; | |
9205 | case XPR_ITERCALL: | |
9206 | ret = exprNode_iterStart (exprData_getIterCallIter (data), | |
9207 | exprNodeList_effect | |
9208 | (exprData_getIterCallArgs (data))); | |
9209 | break; | |
9210 | ||
9211 | case XPR_ITER: | |
9212 | ret = exprNode_iter (exprData_getIterSname (data), | |
9213 | exprNodeList_effect (exprData_getIterAlist (data)), | |
9214 | exprNode_effect (exprData_getIterBody (data)), | |
9215 | exprData_getIterEname (data)); | |
9216 | break; | |
9217 | ||
9218 | case XPR_FOR: | |
9219 | ret = exprNode_for (exprNode_effect (exprData_getPairA (data)), | |
9220 | exprNode_effect (exprData_getPairB (data))); | |
9221 | break; | |
9222 | ||
9223 | case XPR_FORPRED: | |
9224 | ret = exprNode_forPred (exprNode_effect (exprData_getTripleInit (data)), | |
9225 | exprNode_effect (exprData_getTripleTest (data)), | |
9226 | exprNode_effect (exprData_getTripleInc (data))); | |
9227 | break; | |
9228 | ||
9229 | case XPR_TOK: | |
9230 | ret = exprNode_createTok (exprData_getTok (data)); | |
9231 | break; | |
9232 | ||
9233 | case XPR_GOTO: | |
9234 | ret = exprNode_goto (exprData_getLiteral (data)); | |
9235 | ret->loc = fileloc_update (ret->loc, e->loc); | |
9236 | break; | |
9237 | ||
9238 | case XPR_CONTINUE: | |
9239 | ret = exprNode_continue (exprData_getTok (data), QSAFEBREAK); | |
9240 | break; | |
9241 | ||
9242 | case XPR_BREAK: | |
9243 | ret = exprNode_break (exprData_getTok (data), QSAFEBREAK); | |
9244 | break; | |
9245 | ||
9246 | case XPR_RETURN: | |
9247 | ret = exprNode_return (exprNode_effect (exprData_getSingle (data))); | |
9248 | break; | |
9249 | ||
9250 | case XPR_NULLRETURN: | |
9251 | ret = exprNode_nullReturn (exprData_getTok (data)); | |
9252 | break; | |
9253 | ||
9254 | case XPR_COMMA: | |
9255 | ret = exprNode_comma (exprNode_effect (exprData_getPairA (data)), | |
9256 | exprNode_effect (exprData_getPairB (data))); | |
9257 | break; | |
9258 | ||
9259 | case XPR_COND: | |
9260 | ret = exprNode_cond (exprNode_effect (exprData_getTriplePred (data)), | |
9261 | exprNode_effect (exprData_getTripleTrue (data)), | |
9262 | exprNode_effect (exprData_getTripleFalse (data))); | |
9263 | break; | |
9264 | case XPR_IF: | |
9265 | ret = exprNode_if (exprNode_effect (exprData_getPairA (data)), | |
9266 | exprNode_effect (exprData_getPairB (data))); | |
9267 | break; | |
9268 | ||
9269 | case XPR_IFELSE: | |
9270 | ret = exprNode_ifelse (exprNode_effect (exprData_getTriplePred (data)), | |
9271 | exprNode_effect (exprData_getTripleTrue (data)), | |
9272 | exprNode_effect (exprData_getTripleFalse (data))); | |
9273 | break; | |
9274 | case XPR_WHILEPRED: | |
9275 | ret = exprNode_whilePred (exprData_getSingle (data)); | |
9276 | break; | |
9277 | ||
9278 | case XPR_WHILE: | |
9279 | ret = exprNode_while (exprNode_effect (exprData_getPairA (data)), | |
9280 | exprNode_effect (exprData_getPairB (data))); | |
9281 | break; | |
9282 | ||
9283 | case XPR_DOWHILE: | |
9284 | ret = exprNode_doWhile (exprNode_effect (exprData_getPairA (data)), | |
9285 | exprNode_effect (exprData_getPairB (data))); | |
9286 | break; | |
9287 | ||
9288 | case XPR_BLOCK: | |
9289 | ret = exprNode_makeBlock (exprNode_effect (exprData_getSingle (data))); | |
9290 | break; | |
9291 | ||
9292 | case XPR_STMT: | |
9293 | ret = exprNode_statement (exprNode_effect (exprData_getUopNode (data)), | |
9294 | exprData_getUopTok (data)); | |
9295 | break; | |
9296 | ||
9297 | case XPR_STMTLIST: | |
9298 | ret = exprNode_concat (exprNode_effect (exprData_getPairA (data)), | |
9299 | exprNode_effect (exprData_getPairB (data))); | |
9300 | break; | |
9301 | ||
9302 | case XPR_FTCASE: | |
9303 | case XPR_CASE: | |
9304 | ret = exprNode_caseMarker | |
9305 | (exprNode_effect (exprData_getSingle (data)), | |
9306 | TRUE); | |
9307 | break; | |
9308 | ||
9309 | case XPR_FTDEFAULT: | |
9310 | case XPR_DEFAULT: | |
9311 | ret = exprNode_createTok (exprData_getTok (data)); | |
9312 | break; | |
9313 | ||
9314 | case XPR_SWITCH: | |
9315 | ret = exprNode_switch (exprNode_effect (exprData_getPairA (data)), | |
9316 | exprNode_effect (exprData_getPairB (data))); | |
9317 | break; | |
9318 | ||
9319 | case XPR_INIT: | |
9320 | ret = exprNode_makeInitialization | |
9321 | (exprData_getInitId (data), | |
9322 | exprNode_effect (exprData_getInitNode (data))); | |
9323 | break; | |
9324 | ||
9325 | case XPR_FACCESS: | |
9326 | ret = exprNode_fieldAccessAux | |
9327 | (exprNode_effect (exprData_getFieldNode (data)), | |
9328 | exprNode_loc (exprData_getFieldNode (data)), | |
9329 | cstring_copy (exprData_getFieldName (data))); | |
9330 | break; | |
9331 | ||
9332 | case XPR_ARROW: | |
9333 | ret = exprNode_arrowAccessAux | |
9334 | (exprNode_effect (exprData_getFieldNode (data)), | |
9335 | exprNode_loc (exprData_getFieldNode (data)), | |
9336 | cstring_copy (exprData_getFieldName (data))); | |
9337 | break; | |
9338 | ||
9339 | case XPR_STRINGLITERAL: | |
9340 | ret = e; | |
9341 | break; | |
9342 | ||
9343 | case XPR_NUMLIT: | |
9344 | ret = e; | |
9345 | break; | |
9346 | ||
9347 | case XPR_NODE: | |
9348 | ret = e; | |
9349 | break; | |
9350 | /*@-branchstate@*/ | |
9351 | } | |
9352 | /*@=branchstate@*/ | |
9353 | /*@=observertrans@*/ | |
9354 | /*@=exposetrans@*/ | |
9355 | /*@=dependenttrans@*/ | |
9356 | } | |
9357 | ||
9358 | if (!innerEffect) | |
9359 | { | |
9360 | inEffect = FALSE; | |
9361 | } | |
9362 | ||
9363 | return ret; | |
9364 | } | |
9365 | ||
9366 | static /*@observer@*/ cstring exprNode_rootVarName (exprNode e) | |
9367 | { | |
9368 | cstring ret; | |
9369 | exprData data; | |
9370 | ||
9371 | if (exprNode_isError (e)) | |
9372 | { | |
9373 | return cstring_undefined; | |
9374 | } | |
9375 | ||
9376 | data = e->edata; | |
9377 | ||
9378 | switch (e->kind) | |
9379 | { | |
9380 | case XPR_PARENS: | |
9381 | ret = exprNode_rootVarName (exprData_getUopNode (data)); | |
9382 | break; | |
9383 | case XPR_ASSIGN: | |
9384 | ret = exprNode_rootVarName (exprData_getOpA (data)); | |
9385 | break; | |
9386 | case XPR_CONST: | |
9387 | case XPR_VAR: | |
9388 | ret = exprData_getId (data); | |
9389 | break; | |
9390 | case XPR_INIT: | |
9391 | ret = idDecl_getName (exprData_getInitId (data)); | |
9392 | break; | |
9393 | case XPR_LABEL: | |
9394 | case XPR_TOK: | |
9395 | case XPR_ITERCALL: | |
9396 | case XPR_EMPTY: | |
9397 | case XPR_CALL: | |
9398 | case XPR_INITBLOCK: | |
9399 | case XPR_BODY: | |
9400 | case XPR_FETCH: | |
9401 | case XPR_OP: | |
9402 | case XPR_POSTOP: | |
9403 | case XPR_PREOP: | |
9404 | case XPR_OFFSETOF: | |
9405 | case XPR_ALIGNOFT: | |
9406 | case XPR_ALIGNOF: | |
9407 | case XPR_SIZEOFT: | |
9408 | case XPR_SIZEOF: | |
9409 | case XPR_VAARG: | |
9410 | case XPR_CAST: | |
9411 | case XPR_ITER: | |
9412 | case XPR_FOR: | |
9413 | case XPR_FORPRED: | |
9414 | case XPR_BREAK: | |
9415 | case XPR_RETURN: | |
9416 | case XPR_NULLRETURN: | |
9417 | case XPR_COMMA: | |
9418 | case XPR_COND: | |
9419 | case XPR_IF: | |
9420 | case XPR_IFELSE: | |
9421 | case XPR_WHILE: | |
9422 | case XPR_WHILEPRED: | |
9423 | case XPR_DOWHILE: | |
9424 | case XPR_GOTO: | |
9425 | case XPR_CONTINUE: | |
9426 | case XPR_FTDEFAULT: | |
9427 | case XPR_DEFAULT: | |
9428 | case XPR_SWITCH: | |
9429 | case XPR_FTCASE: | |
9430 | case XPR_CASE: | |
9431 | case XPR_BLOCK: | |
9432 | case XPR_STMT: | |
9433 | case XPR_STMTLIST: | |
9434 | case XPR_FACCESS: | |
9435 | case XPR_ARROW: | |
9436 | case XPR_NODE: | |
9437 | case XPR_NUMLIT: | |
9438 | case XPR_STRINGLITERAL: | |
9439 | ret = cstring_undefined; | |
9440 | break; | |
9441 | } | |
9442 | ||
9443 | return ret; | |
9444 | } | |
9445 | ||
9446 | static /*@only@*/ cstring exprNode_doUnparse (exprNode e) | |
9447 | { | |
9448 | cstring ret; | |
9449 | exprData data; | |
9450 | ||
9451 | if (exprNode_isError (e)) | |
9452 | { | |
9453 | static /*@only@*/ cstring error = cstring_undefined; | |
9454 | ||
9455 | if (!cstring_isDefined (error)) | |
9456 | { | |
9457 | error = cstring_makeLiteral ("<error>"); | |
9458 | } | |
9459 | ||
9460 | return error; | |
9461 | } | |
9462 | ||
9463 | data = e->edata; | |
9464 | ||
9465 | switch (e->kind) | |
9466 | { | |
9467 | case XPR_PARENS: | |
9468 | ret = message ("(%s)", exprNode_unparse (exprData_getUopNode (e->edata))); | |
9469 | break; | |
9470 | case XPR_ASSIGN: | |
9471 | ret = message ("%s %s %s", | |
9472 | exprNode_unparse (exprData_getOpA (data)), | |
9473 | lltok_unparse (exprData_getOpTok (data)), | |
9474 | exprNode_unparse (exprData_getOpB (data))); | |
9475 | break; | |
9476 | case XPR_CALL: | |
9477 | ret = message ("%s(%q)", | |
9478 | exprNode_unparse (exprData_getFcn (data)), | |
9479 | exprNodeList_unparse (exprData_getArgs (data))); | |
9480 | break; | |
9481 | case XPR_INITBLOCK: | |
9482 | ret = message ("{ %q }", exprNodeList_unparse (exprData_getArgs (data))); | |
9483 | break; | |
9484 | case XPR_EMPTY: | |
9485 | ret = cstring_undefined; | |
9486 | break; | |
9487 | case XPR_LABEL: | |
9488 | ret = message ("%s:", exprData_getId (data)); | |
9489 | break; | |
9490 | case XPR_CONST: | |
9491 | case XPR_VAR: | |
9492 | ret = cstring_copy (exprData_getId (data)); | |
9493 | break; | |
9494 | case XPR_FETCH: | |
9495 | ret = message ("%s[%s]", exprNode_unparse (exprData_getPairA (data)), | |
9496 | exprNode_unparse (exprData_getPairB (data))); | |
9497 | break; | |
9498 | case XPR_BODY: | |
9499 | ret = message ("<body>"); | |
9500 | break; | |
9501 | case XPR_OP: | |
9502 | ret = message ("%s %s %s", | |
9503 | exprNode_unparse (exprData_getOpA (data)), | |
9504 | lltok_unparse (exprData_getOpTok (data)), | |
9505 | exprNode_unparse (exprData_getOpB (data))); | |
9506 | break; | |
9507 | ||
9508 | case XPR_PREOP: | |
9509 | ret = message ("%s%s", | |
9510 | lltok_unparse (exprData_getUopTok (data)), | |
9511 | exprNode_unparse (exprData_getUopNode (data))); | |
9512 | break; | |
9513 | ||
9514 | case XPR_POSTOP: | |
9515 | ret = message ("%s%s", | |
9516 | exprNode_unparse (exprData_getUopNode (data)), | |
9517 | lltok_unparse (exprData_getUopTok (data))); | |
9518 | break; | |
9519 | ||
9520 | case XPR_OFFSETOF: | |
9521 | ret = message ("offsetof(%s,%q)", | |
9522 | ctype_unparse (qtype_getType (exprData_getOffsetType (data))), | |
9523 | cstringList_unparseSep (exprData_getOffsetName (data), cstring_makeLiteralTemp ("."))); | |
9524 | break; | |
9525 | ||
9526 | case XPR_SIZEOFT: | |
9527 | ret = message ("sizeof(%s)", ctype_unparse (qtype_getType (exprData_getType (data)))); | |
9528 | break; | |
9529 | ||
9530 | case XPR_SIZEOF: | |
9531 | ret = message ("sizeof(%s)", exprNode_unparse (exprData_getSingle (data))); | |
9532 | break; | |
9533 | ||
9534 | case XPR_ALIGNOFT: | |
9535 | ret = message ("alignof(%s)", ctype_unparse (qtype_getType (exprData_getType (data)))); | |
9536 | break; | |
9537 | ||
9538 | case XPR_ALIGNOF: | |
9539 | ret = message ("alignof(%s)", exprNode_unparse (exprData_getSingle (data))); | |
9540 | break; | |
9541 | ||
9542 | case XPR_VAARG: | |
9543 | ret = message ("va_arg(%s, %q)", | |
9544 | exprNode_unparse (exprData_getCastNode (data)), | |
9545 | qtype_unparse (exprData_getCastType (data))); | |
9546 | break; | |
9547 | ||
9548 | case XPR_ITERCALL: | |
9549 | ret = message ("%q(%q)", | |
9550 | uentry_getName (exprData_getIterCallIter (data)), | |
9551 | exprNodeList_unparse (exprData_getIterCallArgs (data))); | |
9552 | break; | |
9553 | case XPR_ITER: | |
9554 | ret = message ("%q(%q) %s %q", | |
9555 | uentry_getName (exprData_getIterSname (data)), | |
9556 | exprNodeList_unparse (exprData_getIterAlist (data)), | |
9557 | exprNode_unparse (exprData_getIterBody (data)), | |
9558 | uentry_getName (exprData_getIterEname (data))); | |
9559 | break; | |
9560 | case XPR_CAST: | |
9561 | ret = message ("(%q)%s", | |
9562 | qtype_unparse (exprData_getCastType (data)), | |
9563 | exprNode_unparse (exprData_getCastNode (data))); | |
9564 | break; | |
9565 | ||
9566 | case XPR_FOR: | |
9567 | ret = message ("%s %s", | |
9568 | exprNode_unparse (exprData_getPairA (data)), | |
9569 | exprNode_unparse (exprData_getPairB (data))); | |
9570 | break; | |
9571 | ||
9572 | case XPR_FORPRED: | |
9573 | ret = message ("for (%s; %s; %s)", | |
9574 | exprNode_unparse (exprData_getTripleInit (data)), | |
9575 | exprNode_unparse (exprData_getTripleTest (data)), | |
9576 | exprNode_unparse (exprData_getTripleInc (data))); | |
9577 | break; | |
9578 | ||
9579 | case XPR_GOTO: | |
9580 | ret = message ("goto %s", exprData_getLiteral (data)); | |
9581 | break; | |
9582 | ||
9583 | case XPR_CONTINUE: | |
9584 | ret = cstring_makeLiteral ("continue"); | |
9585 | break; | |
9586 | ||
9587 | case XPR_BREAK: | |
9588 | ret = cstring_makeLiteral ("break"); | |
9589 | break; | |
9590 | ||
9591 | case XPR_RETURN: | |
9592 | ret = message ("return %s", exprNode_unparse (exprData_getSingle (data))); | |
9593 | break; | |
9594 | ||
9595 | case XPR_NULLRETURN: | |
9596 | ret = cstring_makeLiteral ("return"); | |
9597 | break; | |
9598 | ||
9599 | case XPR_COMMA: | |
9600 | ret = message ("%s, %s", | |
9601 | exprNode_unparse (exprData_getPairA (data)), | |
9602 | exprNode_unparse (exprData_getPairB (data))); | |
9603 | break; | |
9604 | ||
9605 | case XPR_COND: | |
9606 | ret = message ("%s ? %s : %s", | |
9607 | exprNode_unparse (exprData_getTriplePred (data)), | |
9608 | exprNode_unparse (exprData_getTripleTrue (data)), | |
9609 | exprNode_unparse (exprData_getTripleFalse (data))); | |
9610 | break; | |
9611 | case XPR_IF: | |
9612 | ret = message ("if (%s) %s", | |
9613 | exprNode_unparse (exprData_getPairA (data)), | |
9614 | exprNode_unparse (exprData_getPairB (data))); | |
9615 | break; | |
9616 | ||
9617 | case XPR_IFELSE: | |
9618 | ret = message ("if (%s) %s else %s", | |
9619 | exprNode_unparse (exprData_getTriplePred (data)), | |
9620 | exprNode_unparse (exprData_getTripleTrue (data)), | |
9621 | exprNode_unparse (exprData_getTripleFalse (data))); | |
9622 | break; | |
9623 | case XPR_WHILE: | |
9624 | ret = message ("while (%s) %s", | |
9625 | exprNode_unparse (exprData_getPairA (data)), | |
9626 | exprNode_unparse (exprData_getPairB (data))); | |
9627 | break; | |
9628 | ||
9629 | case XPR_WHILEPRED: | |
9630 | ret = cstring_copy (exprNode_unparse (exprData_getSingle (data))); | |
9631 | break; | |
9632 | ||
9633 | case XPR_TOK: | |
9634 | ret = cstring_copy (lltok_unparse (exprData_getTok (data))); | |
9635 | break; | |
9636 | ||
9637 | case XPR_DOWHILE: | |
9638 | ret = message ("do { %s } while (%s)", | |
9639 | exprNode_unparse (exprData_getPairB (data)), | |
9640 | exprNode_unparse (exprData_getPairA (data))); | |
9641 | break; | |
9642 | ||
9643 | case XPR_BLOCK: | |
9644 | ret = message ("{ %s }", exprNode_unparse (exprData_getSingle (data))); | |
9645 | /* evans 2002-02-20 was unparseFirst! */ | |
9646 | break; | |
9647 | ||
9648 | case XPR_STMT: | |
9649 | ret = message ("%s;", exprNode_unparse (exprData_getUopNode (data))); | |
9650 | break; | |
9651 | ||
9652 | case XPR_STMTLIST: | |
9653 | if (exprNode_isStatement (exprData_getPairA (data))) | |
9654 | { | |
9655 | /* | |
9656 | ** statement expressions already print the ; | |
9657 | */ | |
9658 | ||
9659 | ret = message ("%s %s", | |
9660 | exprNode_unparse (exprData_getPairA (data)), | |
9661 | exprNode_unparse (exprData_getPairB (data))); | |
9662 | } | |
9663 | else | |
9664 | { | |
9665 | ret = message ("%s; %s", | |
9666 | exprNode_unparse (exprData_getPairA (data)), | |
9667 | exprNode_unparse (exprData_getPairB (data))); | |
9668 | } | |
9669 | break; | |
9670 | ||
9671 | case XPR_FTDEFAULT: | |
9672 | case XPR_DEFAULT: | |
9673 | ret = cstring_makeLiteral ("default:"); | |
9674 | break; | |
9675 | ||
9676 | case XPR_SWITCH: | |
9677 | ret = message ("switch (%s) %s", | |
9678 | exprNode_unparse (exprData_getPairA (data)), | |
9679 | exprNode_unparse (exprData_getPairB (data))); | |
9680 | break; | |
9681 | ||
9682 | case XPR_FTCASE: | |
9683 | case XPR_CASE: | |
9684 | ret = message ("case %s:", | |
9685 | exprNode_unparse (exprData_getSingle (data))); | |
9686 | break; | |
9687 | ||
9688 | case XPR_INIT: | |
9689 | if (exprNode_isError (exprData_getInitNode (data))) | |
9690 | { | |
9691 | ret = message ("%q", idDecl_unparseC (exprData_getInitId (data))); | |
9692 | } | |
9693 | else | |
9694 | { | |
9695 | ret = message ("%q = %s", | |
9696 | idDecl_unparseC (exprData_getInitId (data)), | |
9697 | exprNode_unparse (exprData_getInitNode (data))); | |
9698 | } | |
9699 | break; | |
9700 | ||
9701 | case XPR_FACCESS: | |
9702 | ret = message ("%s.%s", | |
9703 | exprNode_unparse (exprData_getFieldNode (data)), | |
9704 | exprData_getFieldName (data)); | |
9705 | break; | |
9706 | ||
9707 | case XPR_ARROW: | |
9708 | ret = message ("%s->%s", | |
9709 | exprNode_unparse (exprData_getFieldNode (data)), | |
9710 | exprData_getFieldName (data)); | |
9711 | break; | |
9712 | ||
9713 | case XPR_STRINGLITERAL: | |
9714 | if (ctype_isWideString (e->typ)) | |
9715 | { | |
9716 | ret = message ("L\"%s\"", exprData_getLiteral (data)); | |
9717 | } | |
9718 | else | |
9719 | { | |
9720 | ret = message ("\"%s\"", exprData_getLiteral (data)); | |
9721 | } | |
9722 | break; | |
9723 | ||
9724 | case XPR_NUMLIT: | |
9725 | ret = cstring_copy (exprData_getLiteral (data)); | |
9726 | break; | |
9727 | ||
9728 | case XPR_NODE: | |
9729 | ret = cstring_makeLiteral ("<node>"); | |
9730 | break; | |
9731 | } | |
9732 | ||
9733 | return ret; | |
9734 | } | |
9735 | ||
9736 | bool | |
9737 | exprNode_isInitializer (exprNode e) | |
9738 | { | |
9739 | return (exprNode_isDefined (e) | |
9740 | && e->kind == XPR_INIT); | |
9741 | } | |
9742 | ||
9743 | bool | |
9744 | exprNode_isCharLiteral (exprNode e) | |
9745 | { | |
9746 | if (exprNode_isDefined (e)) | |
9747 | { | |
9748 | return (multiVal_isChar (exprNode_getValue (e))); | |
9749 | } | |
9750 | else | |
9751 | { | |
9752 | return FALSE; | |
9753 | } | |
9754 | } | |
9755 | ||
9756 | bool | |
9757 | exprNode_isNumLiteral (exprNode e) | |
9758 | { | |
9759 | if (exprNode_isDefined (e)) | |
9760 | { | |
9761 | return (multiVal_isInt (exprNode_getValue (e))); | |
9762 | } | |
9763 | else | |
9764 | { | |
9765 | return FALSE; | |
9766 | } | |
9767 | } | |
9768 | ||
9769 | static bool | |
9770 | exprNode_isFalseConstant (exprNode e) | |
9771 | { | |
9772 | if (exprNode_isDefined (e)) | |
9773 | { | |
9774 | cstring s = exprNode_rootVarName (e); | |
9775 | ||
9776 | if (cstring_equal (s, context_getFalseName ())) | |
9777 | { | |
9778 | return TRUE; | |
9779 | } | |
9780 | } | |
9781 | ||
9782 | return FALSE; | |
9783 | } | |
9784 | ||
9785 | bool | |
9786 | exprNode_matchLiteral (ctype expected, exprNode e) | |
9787 | { | |
9788 | if (exprNode_isDefined (e)) | |
9789 | { | |
9790 | multiVal m = exprNode_getValue (e); | |
9791 | ||
9792 | if (multiVal_isDefined (m)) | |
9793 | { | |
9794 | if (multiVal_isInt (m)) | |
9795 | { | |
9796 | long int val = multiVal_forceInt (m); | |
9797 | ||
9798 | if (ctype_isNumAbstract (expected) | |
9799 | && context_flagOn (FLG_NUMABSTRACTLIT, exprNode_loc (e))) | |
9800 | { | |
9801 | return TRUE; | |
9802 | } | |
9803 | ||
9804 | if (ctype_isDirectBool (ctype_realishType (expected))) | |
9805 | { | |
9806 | if (val == 0) | |
9807 | { | |
9808 | return FALSE; /* really?! return TRUE; allow use of 0 for FALSE */ | |
9809 | } | |
9810 | else | |
9811 | { | |
9812 | return FALSE; | |
9813 | } | |
9814 | } | |
9815 | ||
9816 | if (ctype_isRealInt (expected)) | |
9817 | { | |
9818 | /* | |
9819 | ** unsigned <- [ constant >= 0 is okay ] | |
9820 | */ | |
9821 | ||
9822 | if (ctype_isUnsigned (expected)) | |
9823 | { | |
9824 | if (val < 0) | |
9825 | { | |
9826 | return FALSE; | |
9827 | } | |
9828 | } | |
9829 | ||
9830 | /* | |
9831 | ** No checks on sizes of integers...maybe add | |
9832 | ** these later. | |
9833 | */ | |
9834 | ||
9835 | DPRINTF (("Here: %s => %s", exprNode_unparse (e), ctype_unparse (expected))); | |
9836 | DPRINTF (("Type: %s / %s", ctype_unparse (exprNode_getType (e)), | |
9837 | bool_unparse (ctype_isInt (exprNode_getType (e))))); | |
9838 | ||
9839 | if (context_getFlag (FLG_NUMLITERAL) | |
9840 | && (ctype_isRegularInt (exprNode_getType (e)) || val == 0)) { | |
9841 | return TRUE; | |
9842 | } else { | |
9843 | if (val == 0) { | |
9844 | return TRUE; | |
9845 | } else { | |
9846 | return FALSE; /* evs 2000-05-17: previously, always returned TRUE */ | |
9847 | } | |
9848 | } | |
9849 | } | |
9850 | else if (ctype_isChar (expected)) | |
9851 | { | |
9852 | return FALSE; | |
9853 | } | |
9854 | else if (ctype_isArrayPtr (expected)) | |
9855 | { | |
9856 | /* | |
9857 | ** evans 2001-10-14: We allow 0 to match any pointer, but only if the type matches or is void *. | |
9858 | */ | |
9859 | ||
9860 | if (val == 0) | |
9861 | { | |
9862 | if (ctype_match (exprNode_getType (e), expected) | |
9863 | || ctype_isVoidPointer (exprNode_getType (e))) | |
9864 | { | |
9865 | return TRUE; | |
9866 | } | |
9867 | } | |
9868 | else | |
9869 | { | |
9870 | return FALSE; | |
9871 | } | |
9872 | } | |
9873 | else if (ctype_isAnyFloat (expected)) | |
9874 | { | |
9875 | return (context_getFlag (FLG_NUMLITERAL)); | |
9876 | } | |
9877 | else | |
9878 | { | |
9879 | return FALSE; | |
9880 | } | |
9881 | } | |
9882 | else if (multiVal_isDouble (m)) | |
9883 | { | |
9884 | if (ctype_isAnyFloat (expected)) | |
9885 | { | |
9886 | return TRUE; | |
9887 | } | |
9888 | } | |
9889 | else if (multiVal_isChar (m)) | |
9890 | { | |
9891 | char val = multiVal_forceChar (m); | |
9892 | ||
9893 | if (ctype_isChar (expected)) | |
9894 | { | |
9895 | if (ctype_isUnsigned (expected) && ((int)val) < 0) | |
9896 | { | |
9897 | return FALSE; | |
9898 | } | |
9899 | else | |
9900 | { | |
9901 | return TRUE; | |
9902 | } | |
9903 | } | |
9904 | } | |
9905 | else | |
9906 | { | |
9907 | return FALSE; | |
9908 | } | |
9909 | } | |
9910 | } | |
9911 | ||
9912 | return FALSE; | |
9913 | } | |
9914 | ||
9915 | bool | |
9916 | exprNode_matchType (ctype expected, exprNode e) | |
9917 | { | |
9918 | ctype actual; | |
9919 | ||
9920 | if (!exprNode_isDefined (e)) return TRUE; | |
9921 | ||
9922 | actual = ctype_realishType (exprNode_getType (e)); | |
9923 | ||
9924 | if (ctype_match (ctype_realishType (expected), actual)) | |
9925 | { | |
9926 | return TRUE; | |
9927 | } | |
9928 | ||
9929 | llassert (!exprNode_isError (e)); | |
9930 | return (exprNode_matchLiteral (expected, e)); | |
9931 | } | |
9932 | ||
9933 | static bool | |
9934 | exprNode_matchTypes (exprNode e1, exprNode e2) | |
9935 | { | |
9936 | ctype t1; | |
9937 | ctype t2; | |
9938 | ||
9939 | if (!exprNode_isDefined (e1)) return TRUE; | |
9940 | if (!exprNode_isDefined (e2)) return TRUE; | |
9941 | ||
9942 | /* | |
9943 | ** realish type --- keep bools, bools | |
9944 | */ | |
9945 | ||
9946 | t1 = ctype_realishType (exprNode_getType (e1)); | |
9947 | t2 = ctype_realishType (exprNode_getType (e2)); | |
9948 | ||
9949 | if (ctype_match (t1, t2)) | |
9950 | { | |
9951 | return TRUE; | |
9952 | } | |
9953 | ||
9954 | DPRINTF (("Matching literal! %s %s %s %s", | |
9955 | ctype_unparse (t1), exprNode_unparse (e2), | |
9956 | ctype_unparse (t2), exprNode_unparse (e1))); | |
9957 | ||
9958 | return (exprNode_matchLiteral (t1, e2) || exprNode_matchLiteral (t2, e1)); | |
9959 | } | |
9960 | ||
9961 | /* | |
9962 | ** pass e as ct | |
9963 | */ | |
9964 | ||
9965 | static bool | |
9966 | exprNode_matchArgType (ctype ct, exprNode e) | |
9967 | { | |
9968 | ctype et; | |
9969 | ||
9970 | if (!exprNode_isDefined (e)) | |
9971 | { | |
9972 | return TRUE; | |
9973 | } | |
9974 | ||
9975 | et = ctype_realType (exprNode_getType (e)); | |
9976 | ||
9977 | if (ctype_matchArg (ct, et)) return TRUE; | |
9978 | ||
9979 | llassert (!exprNode_isError (e)); | |
9980 | return (exprNode_matchLiteral (ct, e)); | |
9981 | } | |
9982 | ||
9983 | static /*@only@*/ exprNodeSList | |
9984 | exprNode_flatten (/*@dependent@*/ exprNode e) /*@*/ | |
9985 | { | |
9986 | if (exprNode_isDefined (e)) | |
9987 | { | |
9988 | if (e->kind == XPR_STMTLIST) | |
9989 | { | |
9990 | return (exprNodeSList_append | |
9991 | (exprNode_flatten (exprData_getPairA (e->edata)), | |
9992 | exprNode_flatten (exprData_getPairB (e->edata)))); | |
9993 | } | |
9994 | else if (e->kind == XPR_BLOCK) | |
9995 | { | |
9996 | return (exprNode_flatten (exprData_getSingle (e->edata))); | |
9997 | } | |
9998 | else | |
9999 | { | |
10000 | return (exprNodeSList_singleton (e)); | |
10001 | } | |
10002 | } | |
10003 | ||
10004 | return exprNodeSList_new (); | |
10005 | } | |
10006 | ||
10007 | static /*@exposed@*/ exprNode | |
10008 | exprNode_lastStatement (/*@returned@*/ exprNode e) | |
10009 | { | |
10010 | if (exprNode_isDefined (e)) | |
10011 | { | |
10012 | if (e->kind == XPR_STMTLIST) | |
10013 | { | |
10014 | exprNode b = exprData_getPairB (e->edata); | |
10015 | ||
10016 | if (exprNode_isDefined (b)) | |
10017 | { | |
10018 | return exprNode_lastStatement (b); | |
10019 | } | |
10020 | else | |
10021 | { | |
10022 | return exprNode_lastStatement (exprData_getPairA (e->edata)); | |
10023 | } | |
10024 | } | |
10025 | else if (e->kind == XPR_BLOCK) | |
10026 | { | |
10027 | return (exprNode_lastStatement (exprData_getSingle (e->edata))); | |
10028 | } | |
10029 | else | |
10030 | { | |
10031 | return (e); | |
10032 | } | |
10033 | } | |
10034 | ||
10035 | return exprNode_undefined; | |
10036 | } | |
10037 | ||
10038 | static /*@exposed@*/ exprNode | |
10039 | exprNode_firstStatement (/*@returned@*/ exprNode e) | |
10040 | { | |
10041 | if (exprNode_isDefined (e)) | |
10042 | { | |
10043 | if (e->kind == XPR_STMTLIST) | |
10044 | { | |
10045 | exprNode b = exprData_getPairA (e->edata); | |
10046 | ||
10047 | if (exprNode_isDefined (b)) | |
10048 | { | |
10049 | return exprNode_firstStatement (b); | |
10050 | } | |
10051 | else | |
10052 | { | |
10053 | return exprNode_firstStatement (exprData_getPairB (e->edata)); | |
10054 | } | |
10055 | } | |
10056 | else if (e->kind == XPR_BLOCK) | |
10057 | { | |
10058 | return (exprNode_firstStatement (exprData_getSingle (e->edata))); | |
10059 | } | |
10060 | else | |
10061 | { | |
10062 | return (e); | |
10063 | } | |
10064 | } | |
10065 | ||
10066 | return exprNode_undefined; | |
10067 | } | |
10068 | ||
10069 | static void | |
10070 | exprNode_mergeUSs (exprNode res, exprNode other) | |
10071 | { | |
10072 | if (exprNode_isDefined (res) && exprNode_isDefined (other)) | |
10073 | { | |
10074 | res->msets = sRefSet_union (res->msets, other->msets); | |
10075 | res->sets = sRefSet_union (res->sets, other->sets); | |
10076 | res->uses = sRefSet_union (res->uses, other->uses); | |
10077 | } | |
10078 | } | |
10079 | ||
10080 | static void | |
10081 | exprNode_mergeCondUSs (exprNode res, exprNode other1, exprNode other2) | |
10082 | { | |
10083 | if (exprNode_isDefined (res)) | |
10084 | { | |
10085 | if (exprNode_isDefined (other1)) | |
10086 | { | |
10087 | res->sets = sRefSet_union (res->sets, other1->sets); | |
10088 | res->msets = sRefSet_union (res->msets, other1->msets); | |
10089 | res->uses = sRefSet_union (res->uses, other1->uses); | |
10090 | } | |
10091 | if (exprNode_isDefined (other2)) | |
10092 | { | |
10093 | res->sets = sRefSet_union (res->sets, other2->sets); | |
10094 | res->msets = sRefSet_union (res->msets, other2->msets); | |
10095 | res->uses = sRefSet_union (res->uses, other2->uses); | |
10096 | } | |
10097 | } | |
10098 | } | |
10099 | ||
10100 | /* | |
10101 | ** modifies e->uses | |
10102 | ** | |
10103 | ** Reports errors is s is not defined. | |
10104 | */ | |
10105 | ||
10106 | static void | |
10107 | exprNode_addUse (exprNode e, /*@exposed@*/ sRef s) | |
10108 | { | |
10109 | if (exprNode_isDefined (e)) | |
10110 | { | |
10111 | e->uses = sRefSet_insert (e->uses, s); | |
10112 | } | |
10113 | } | |
10114 | ||
10115 | void | |
10116 | exprNode_checkUse (exprNode e, /*@exposed@*/ sRef s, fileloc loc) | |
10117 | { | |
10118 | if (sRef_isKnown (s) && !sRef_isConst (s)) | |
10119 | { | |
10120 | /* | |
10121 | ** need to check all outer types are useable | |
10122 | */ | |
10123 | ||
10124 | DPRINTF (("Check use: %s / %s", | |
10125 | exprNode_unparse (e), sRef_unparse (s))); | |
10126 | ||
10127 | exprNode_addUse (e, s); | |
10128 | ||
10129 | if (!context_inProtectVars ()) | |
10130 | { | |
10131 | /* | |
10132 | ** only report the deepest error | |
10133 | */ | |
10134 | ||
10135 | sRef errorRef = sRef_undefined; | |
10136 | sRef lastRef = sRef_undefined; | |
10137 | bool deadRef = FALSE; | |
10138 | bool unuseable = FALSE; | |
10139 | bool errorMaybe = FALSE; | |
10140 | ||
10141 | while (sRef_isValid (s) && sRef_isKnown (s)) | |
10142 | { | |
10143 | ynm readable = sRef_isValidLvalue (s); | |
10144 | ||
10145 | DPRINTF (("Readable: %s / %s", | |
10146 | sRef_unparseFull (s), ynm_unparse (readable))); | |
10147 | ||
10148 | if (!(ynm_toBoolStrict (readable))) | |
10149 | { | |
10150 | if (ynm_isMaybe (readable)) | |
10151 | { | |
10152 | lastRef = errorRef; | |
10153 | errorRef = s; | |
10154 | DPRINTF (("Setting ERROR: %s", sRef_unparseFull (s))); | |
10155 | deadRef = sRef_isPossiblyDead (errorRef); | |
10156 | unuseable = sRef_isUnuseable (errorRef); | |
10157 | errorMaybe = TRUE; | |
10158 | } | |
10159 | else | |
10160 | { | |
10161 | lastRef = errorRef; | |
10162 | errorRef = s; | |
10163 | DPRINTF (("Setting ERROR: %s", sRef_unparseFull (s))); | |
10164 | deadRef = sRef_isDead (errorRef); | |
10165 | unuseable = sRef_isUnuseable (errorRef); | |
10166 | errorMaybe = FALSE; | |
10167 | } | |
10168 | ||
10169 | /* | |
10170 | if (!sRef_isPartial (s)) | |
10171 | { | |
10172 | DPRINTF (("Defining! %s", sRef_unparseFull (s))); | |
10173 | sRef_setDefined (s, loc); | |
10174 | DPRINTF (("Defining! %s", sRef_unparseFull (s))); | |
10175 | } | |
10176 | */ | |
10177 | } | |
10178 | ||
10179 | s = sRef_getBaseSafe (s); | |
10180 | } /* end while */ | |
10181 | ||
10182 | if (sRef_isValid (errorRef)) | |
10183 | { | |
10184 | if (sRef_isValid (lastRef) && sRef_isField (lastRef) | |
10185 | && sRef_isPointer (errorRef)) | |
10186 | { | |
10187 | errorRef = lastRef; | |
10188 | DPRINTF (("errorRef: %s", sRef_unparseFull (errorRef))); | |
10189 | } | |
10190 | ||
10191 | if (deadRef) | |
10192 | { | |
10193 | if (sRef_isThroughArrayFetch (errorRef)) | |
10194 | { | |
10195 | if (optgenerror | |
10196 | (FLG_STRICTUSERELEASED, | |
10197 | message ("%q %q may be used after being released", | |
10198 | sRef_unparseKindNamePlain (errorRef), | |
10199 | sRef_unparse (errorRef)), | |
10200 | loc)) | |
10201 | { | |
10202 | sRef_showRefKilled (errorRef); | |
10203 | ||
10204 | if (sRef_isKept (errorRef)) | |
10205 | { | |
10206 | sRef_clearAliasState (errorRef, loc); | |
10207 | } | |
10208 | } | |
10209 | } | |
10210 | else | |
10211 | { | |
10212 | DPRINTF (("HERE: %s", sRef_unparseFull (errorRef))); | |
10213 | ||
10214 | if (optgenerror | |
10215 | (FLG_USERELEASED, | |
10216 | message ("%q %q %qused after being released", | |
10217 | sRef_unparseKindNamePlain (errorRef), | |
10218 | sRef_unparse (errorRef), | |
10219 | cstring_makeLiteral (errorMaybe | |
10220 | ? "may be " : "")), | |
10221 | loc)) | |
10222 | { | |
10223 | sRef_showRefKilled (errorRef); | |
10224 | ||
10225 | if (sRef_isKept (errorRef)) | |
10226 | { | |
10227 | sRef_clearAliasState (errorRef, loc); | |
10228 | } | |
10229 | } | |
10230 | } | |
10231 | } | |
10232 | else if (unuseable) | |
10233 | { | |
10234 | if (optgenerror | |
10235 | (FLG_USEDEF, | |
10236 | message ("%q %q%qused in inconsistent state", | |
10237 | sRef_unparseKindName (errorRef), | |
10238 | sRef_unparseOpt (errorRef), | |
10239 | cstring_makeLiteral (errorMaybe ? "may be " : "")), | |
10240 | loc)) | |
10241 | { | |
10242 | sRef_showStateInconsistent (errorRef); | |
10243 | } | |
10244 | } | |
10245 | else | |
10246 | { | |
10247 | DPRINTF (("HERE: %s", sRef_unparseFull (errorRef))); | |
10248 | ||
10249 | if (optgenerror | |
10250 | (FLG_USEDEF, | |
10251 | message ("%q %q%qused before definition", | |
10252 | sRef_unparseKindName (errorRef), | |
10253 | sRef_unparseOpt (errorRef), | |
10254 | cstring_makeLiteral (errorMaybe ? "may be " : "")), | |
10255 | loc)) | |
10256 | { | |
10257 | ; | |
10258 | } | |
10259 | ||
10260 | DPRINTF (("Error: %s", sRef_unparseFull (errorRef))); | |
10261 | } | |
10262 | ||
10263 | sRef_setDefined (errorRef, loc); | |
10264 | ||
10265 | if (sRef_isAddress (errorRef)) | |
10266 | { | |
10267 | sRef_setDefined (sRef_getRootBase (errorRef), loc); | |
10268 | } | |
10269 | } /* end is error */ | |
10270 | } | |
10271 | } | |
10272 | ||
10273 | setCodePoint (); | |
10274 | } | |
10275 | ||
10276 | static void | |
10277 | checkSafeUse (exprNode e, /*@exposed@*/ sRef s) | |
10278 | { | |
10279 | if (exprNode_isDefined (e) && sRef_isKnown (s)) | |
10280 | { | |
10281 | e->uses = sRefSet_insert (e->uses, s); | |
10282 | } | |
10283 | } | |
10284 | ||
10285 | static void | |
10286 | exprNode_checkSetAny (exprNode e, /*@dependent@*/ cstring name) | |
10287 | { | |
10288 | if (exprNode_isDefined (e)) | |
10289 | { | |
10290 | e->sets = sRefSet_insert (e->sets, sRef_makeUnconstrained (name)); | |
10291 | } | |
10292 | } | |
10293 | ||
10294 | void | |
10295 | exprNode_checkSet (exprNode e, /*@exposed@*/ sRef s) | |
10296 | { | |
10297 | sRef defines = sRef_undefined; | |
10298 | ||
10299 | if (sRef_isValid (s) && !sRef_isNothing (s)) | |
10300 | { | |
10301 | uentry ue = sRef_getBaseUentry (s); | |
10302 | ||
10303 | if (uentry_isValid (ue)) | |
10304 | { | |
10305 | uentry_setLset (ue); | |
10306 | } | |
10307 | ||
10308 | if (!ynm_toBoolStrict (sRef_isWriteable (s))) | |
10309 | { | |
10310 | voptgenerror (FLG_USEDEF, | |
10311 | message ("Attempt to set unuseable storage: %q", | |
10312 | sRef_unparse (s)), | |
10313 | exprNode_loc (e)); | |
10314 | } | |
10315 | ||
10316 | if (sRef_isMeaningful (s)) | |
10317 | { | |
10318 | if (sRef_isDead (s)) | |
10319 | { | |
10320 | sRef base = sRef_getBaseSafe (s); | |
10321 | ||
10322 | if (sRef_isValid (base) | |
10323 | && sRef_isDead (base)) | |
10324 | { | |
10325 | sRef_setPartial (s, exprNode_loc (e)); | |
10326 | } | |
10327 | ||
10328 | defines = s; /* okay - modifies for only param */ | |
10329 | } | |
10330 | else if (sRef_isPartial (s)) | |
10331 | { | |
10332 | sRef eref = exprNode_getSref (e); | |
10333 | ||
10334 | if (!sRef_isPartial (eref)) | |
10335 | { | |
10336 | /* | |
10337 | ** should do something different here??? | |
10338 | */ | |
10339 | ||
10340 | sRef_setDefinedComplete (eref, exprNode_loc (e)); | |
10341 | } | |
10342 | else | |
10343 | { | |
10344 | sRef_setPartialDefinedComplete (eref, exprNode_loc (e)); | |
10345 | } | |
10346 | ||
10347 | if (sRef_isMeaningful (eref)) | |
10348 | { | |
10349 | defines = eref; | |
10350 | } | |
10351 | else | |
10352 | { | |
10353 | defines = s; | |
10354 | } | |
10355 | } | |
10356 | else if (sRef_isAllocated (s)) | |
10357 | { | |
10358 | sRef eref = exprNode_getSref (e); | |
10359 | ||
10360 | ||
10361 | if (!sRef_isAllocated (eref)) | |
10362 | { | |
10363 | sRef_setDefinedComplete (eref, exprNode_loc (e)); | |
10364 | } | |
10365 | else | |
10366 | { | |
10367 | sRef base = sRef_getBaseSafe (eref); | |
10368 | ||
10369 | if (sRef_isValid (base)) | |
10370 | { | |
10371 | sRef_setPdefined (base, exprNode_loc (e)); | |
10372 | } | |
10373 | } | |
10374 | ||
10375 | defines = s; | |
10376 | } | |
10377 | else | |
10378 | { | |
10379 | sRef_setDefinedNCComplete (s, exprNode_loc (e)); | |
10380 | defines = s; | |
10381 | } | |
10382 | ||
10383 | } | |
10384 | else /* not meaningful...but still need to insert it */ | |
10385 | { | |
10386 | defines = s; | |
10387 | } | |
10388 | } | |
10389 | ||
10390 | if (exprNode_isDefined (e) && sRef_isValid (defines)) | |
10391 | { | |
10392 | e->sets = sRefSet_insert (e->sets, defines); | |
10393 | } | |
10394 | } | |
10395 | ||
10396 | void | |
10397 | exprNode_checkMSet (exprNode e, /*@exposed@*/ sRef s) | |
10398 | { | |
10399 | if (sRef_isValid (s) && !sRef_isNothing (s)) | |
10400 | { | |
10401 | uentry ue = sRef_getBaseUentry (s); | |
10402 | ||
10403 | if (uentry_isValid (ue)) | |
10404 | { | |
10405 | uentry_setLset (ue); | |
10406 | } | |
10407 | ||
10408 | if (!ynm_toBoolStrict (sRef_isWriteable (s))) | |
10409 | { | |
10410 | voptgenerror (FLG_USEDEF, | |
10411 | message ("Attempt to set unuseable storage: %q", sRef_unparse (s)), | |
10412 | exprNode_loc (e)); | |
10413 | } | |
10414 | ||
10415 | if (sRef_isMeaningful (s)) | |
10416 | { | |
10417 | sRef_setDefinedComplete (s, exprNode_loc (e)); | |
10418 | } | |
10419 | ||
10420 | if (exprNode_isDefined (e)) | |
10421 | { | |
10422 | e->msets = sRefSet_insert (e->msets, s); | |
10423 | } | |
10424 | } | |
10425 | } | |
10426 | ||
10427 | static void | |
10428 | checkUnspecCall (/*@notnull@*/ /*@dependent@*/ exprNode fcn, uentryList params, exprNodeList args) | |
10429 | { | |
10430 | checkAnyCall (fcn, cstring_undefined, params, args, | |
10431 | FALSE, sRefSet_undefined, FALSE, 0); | |
10432 | } | |
10433 | ||
10434 | static void | |
10435 | checkOneArg (uentry ucurrent, /*@notnull@*/ exprNode current, | |
10436 | /*@dependent@*/ exprNode fcn, bool isSpec, int argno, int totargs) | |
10437 | { | |
10438 | setCodePoint (); | |
10439 | ||
10440 | if (uentry_isYield (ucurrent)) | |
10441 | { | |
10442 | sRef_setDefined (exprNode_getSref (current), exprNode_loc (current)); | |
10443 | exprNode_checkSet (current, current->sref); | |
10444 | } | |
10445 | else | |
10446 | { | |
10447 | if (uentry_isSefParam (ucurrent)) | |
10448 | { | |
10449 | sRefSet sets = current->sets; | |
10450 | sRef ref = exprNode_getSref (current); | |
10451 | ||
10452 | if (sRef_isMacroParamRef (ref)) | |
10453 | { | |
10454 | uentry ue = sRef_getUentry (ref); | |
10455 | ||
10456 | if (!uentry_isSefParam (ue)) | |
10457 | { | |
10458 | voptgenerror | |
10459 | (FLG_SEFPARAMS, | |
10460 | message | |
10461 | ("Parameter %d to %s is declared sef, but " | |
10462 | "the argument is a macro parameter declared " | |
10463 | "without sef: %s", | |
10464 | argno, exprNode_unparse (fcn), | |
10465 | exprNode_unparse (current)), | |
10466 | exprNode_loc (current)); | |
10467 | } | |
10468 | } | |
10469 | ||
10470 | if (!sRefSet_isEmpty (sets)) | |
10471 | { | |
10472 | sRefSet reported = sRefSet_undefined; | |
10473 | ||
10474 | sRefSet_realElements (current->sets, el) | |
10475 | { | |
10476 | if (sRefSet_isSameNameMember (reported, el)) | |
10477 | { | |
10478 | ; /* don't report again */ | |
10479 | } | |
10480 | else | |
10481 | { | |
10482 | if (sRef_isUnconstrained (el)) | |
10483 | { | |
10484 | voptgenerror | |
10485 | (FLG_SEFUNSPEC, | |
10486 | message | |
10487 | ("Parameter %d to %s is declared sef, but " | |
10488 | "the argument calls unconstrained function %s " | |
10489 | "(no guarantee it will not modify something): %s", | |
10490 | argno, exprNode_unparse (fcn), | |
10491 | sRef_unconstrainedName (el), | |
10492 | exprNode_unparse (current)), | |
10493 | exprNode_loc (current)); | |
10494 | } | |
10495 | else | |
10496 | { | |
10497 | voptgenerror | |
10498 | (FLG_SEFPARAMS, | |
10499 | message | |
10500 | ("Parameter %d to %s is declared sef, but " | |
10501 | "the argument may modify %q: %s", | |
10502 | argno, exprNode_unparse (fcn), | |
10503 | sRef_unparse (el), | |
10504 | exprNode_unparse (current)), | |
10505 | exprNode_loc (current)); | |
10506 | } | |
10507 | } | |
10508 | } end_sRefSet_realElements; | |
10509 | } | |
10510 | } | |
10511 | ||
10512 | transferChecks_passParam (current, ucurrent, isSpec, fcn, argno, totargs); | |
10513 | exprNode_mergeUSs (fcn, current); | |
10514 | } | |
10515 | } | |
10516 | ||
10517 | static void | |
10518 | checkAnyCall (/*@dependent@*/ exprNode fcn, | |
10519 | /*@dependent@*/ cstring fname, | |
10520 | uentryList pn, | |
10521 | exprNodeList args, | |
10522 | bool hasMods, sRefSet mods, | |
10523 | bool isSpec, | |
10524 | int specialArgs) | |
10525 | { | |
10526 | int paramno = 0; | |
10527 | int nargs = exprNodeList_size (args); | |
10528 | ||
10529 | setCodePoint (); | |
10530 | ||
10531 | /* | |
10532 | ** concat all args ud's to f, add each arg sref as a use unless | |
10533 | ** it was specified as "out", in which case it is a def. | |
10534 | */ | |
10535 | ||
10536 | uentryList_reset (pn); | |
10537 | ||
10538 | /* | |
10539 | ** aliasing checks: | |
10540 | ** | |
10541 | ** if paramn is only or unique, no other arg may alias argn | |
10542 | */ | |
10543 | ||
10544 | exprNodeList_elements (args, current) | |
10545 | { | |
10546 | paramno++; | |
10547 | ||
10548 | if (exprNode_isDefined (current)) | |
10549 | { | |
10550 | if ((!uentryList_isUndefined (pn) && !uentryList_isFinished (pn))) | |
10551 | { | |
10552 | uentry ucurrent = uentryList_current (pn); | |
10553 | ||
10554 | if (specialArgs == 0 | |
10555 | || (paramno < specialArgs)) | |
10556 | { | |
10557 | checkOneArg (ucurrent, current, fcn, isSpec, paramno, nargs); | |
10558 | ||
10559 | if (context_maybeSet (FLG_ALIASUNIQUE)) | |
10560 | { | |
10561 | if (uentry_isOnly (ucurrent) | |
10562 | || uentry_isUnique (ucurrent)) | |
10563 | { | |
10564 | checkUniqueParams (fcn, current, args, | |
10565 | paramno, ucurrent); | |
10566 | } | |
10567 | } | |
10568 | } | |
10569 | } | |
10570 | else /* uentry is undefined */ | |
10571 | { | |
10572 | if (specialArgs == 0) | |
10573 | { | |
10574 | exprNode_checkUseParam (current); | |
10575 | } | |
10576 | ||
10577 | exprNode_mergeUSs (fcn, current); | |
10578 | } | |
10579 | } | |
10580 | uentryList_advanceSafe (pn); | |
10581 | } end_exprNodeList_elements; | |
10582 | ||
10583 | if (hasMods) | |
10584 | { | |
10585 | setCodePoint (); | |
10586 | ||
10587 | sRefSet_allElements (mods, s) | |
10588 | { | |
10589 | sRef fb; | |
10590 | sRef rb = sRef_getRootBase (s); | |
10591 | ||
10592 | if (sRef_isFileOrGlobalScope (rb)) | |
10593 | { | |
10594 | context_usedGlobal (rb); | |
10595 | } | |
10596 | ||
10597 | fb = sRef_fixBaseParam (s, args); | |
10598 | ||
10599 | if (!sRef_isMacroParamRef (fb)) | |
10600 | { | |
10601 | if (sRef_isNothing (fb)) | |
10602 | { | |
10603 | ; | |
10604 | } | |
10605 | else | |
10606 | { | |
10607 | if (sRef_isValid (fb)) | |
10608 | { | |
10609 | uentry ue = sRef_getBaseUentry (s); | |
10610 | ||
10611 | if (uentry_isValid (ue)) | |
10612 | { | |
10613 | uentry_setLset (ue); | |
10614 | } | |
10615 | } | |
10616 | ||
10617 | fcn->sets = sRefSet_insert (fcn->sets, fb); | |
10618 | } | |
10619 | } | |
10620 | sRef_clearDerivedComplete (s); | |
10621 | } end_sRefSet_allElements; | |
10622 | ||
10623 | setCodePoint (); | |
10624 | } | |
10625 | else | |
10626 | { | |
10627 | if (context_hasMods ()) | |
10628 | { | |
10629 | if (context_maybeSet (FLG_MODUNCON)) | |
10630 | { | |
10631 | voptgenerror | |
10632 | (FLG_MODUNCON, | |
10633 | message ("Undetected modification possible " | |
10634 | "from call to unconstrained function %s: %s", | |
10635 | fname, | |
10636 | exprNode_unparse (fcn)), | |
10637 | exprNode_loc (fcn)); | |
10638 | } | |
10639 | } | |
10640 | else | |
10641 | { | |
10642 | if (context_maybeSet (FLG_MODUNCONNOMODS) | |
10643 | && !(context_inIterDef () || context_inIterEnd ())) | |
10644 | { | |
10645 | voptgenerror | |
10646 | (FLG_MODUNCONNOMODS, | |
10647 | message ("Undetected modification possible " | |
10648 | "from call to unconstrained function %s: %s", | |
10649 | fname, | |
10650 | exprNode_unparse (fcn)), | |
10651 | exprNode_loc (fcn)); | |
10652 | } | |
10653 | } | |
10654 | ||
10655 | exprNode_checkSetAny (fcn, fname); | |
10656 | } | |
10657 | } | |
10658 | ||
10659 | void exprNode_checkUseParam (exprNode current) | |
10660 | { | |
10661 | if (exprNode_isDefined (current)) | |
10662 | { | |
10663 | exprNode_checkUse (current, current->sref, current->loc); | |
10664 | } | |
10665 | } | |
10666 | ||
10667 | static ctype | |
10668 | checkNumerics (ctype tr1, ctype tr2, ctype te1, ctype te2, | |
10669 | /*@notnull@*/ exprNode e1, /*@notnull@*/ exprNode e2, | |
10670 | lltok op) | |
10671 | { | |
10672 | ctype ret = tr1; | |
10673 | ||
10674 | if (!ctype_match (tr1, tr2)) | |
10675 | { | |
10676 | if ((ctype_isRealInt (tr1) || ctype_isReal (tr1)) && | |
10677 | (ctype_isRealInt (tr2) || ctype_isReal (tr2))) | |
10678 | { | |
10679 | DPRINTF (("No error: [%s] %s / [%s] %s", | |
10680 | exprNode_unparse (e1), ctype_unparse (tr1), | |
10681 | exprNode_unparse (e2), ctype_unparse (tr2))); | |
10682 | ||
10683 | ret = ctype_biggerType (tr1, tr2); | |
10684 | } | |
10685 | else | |
10686 | { | |
10687 | if (ctype_isNumAbstract (tr1) | |
10688 | && exprNode_isNumLiteral (e2) | |
10689 | && context_flagOn (FLG_NUMABSTRACTLIT, e1->loc)) | |
10690 | { | |
10691 | ret = tr1; /* No error */ | |
10692 | } | |
10693 | else if (ctype_isNumAbstract (tr2) | |
10694 | && exprNode_isNumLiteral (e1) | |
10695 | && context_flagOn (FLG_NUMABSTRACTLIT, e1->loc)) | |
10696 | { | |
10697 | ret = tr2; | |
10698 | } | |
10699 | else | |
10700 | { | |
10701 | if (gentypeerror | |
10702 | (tr1, e1, tr2, e2, | |
10703 | message ("Incompatible types for %s (%s, %s): %s %s %s", | |
10704 | lltok_unparse (op), | |
10705 | ctype_unparse (te1), | |
10706 | ctype_unparse (te2), | |
10707 | exprNode_unparse (e1), lltok_unparse (op), | |
10708 | exprNode_unparse (e2)), | |
10709 | e1->loc)) | |
10710 | { | |
10711 | ret = ctype_unknown; | |
10712 | } | |
10713 | else | |
10714 | { | |
10715 | ret = ctype_biggerType (tr1, tr2); | |
10716 | } | |
10717 | } | |
10718 | } | |
10719 | } | |
10720 | else | |
10721 | { | |
10722 | if (ctype_isNumAbstract (tr1)) | |
10723 | { | |
10724 | ret = tr1; | |
10725 | } | |
10726 | else if (ctype_isForceRealNumeric (&tr1) | |
10727 | && ctype_isForceRealNumeric (&tr2)) | |
10728 | { | |
10729 | ret = ctype_resolveNumerics (tr1, tr2); | |
10730 | } | |
10731 | else if (!context_msgStrictOps ()) | |
10732 | { | |
10733 | if (ctype_isPointer (tr1)) | |
10734 | { | |
10735 | if (ctype_isPointer (tr2) && !exprNode_isNullValue (e2)) | |
10736 | { | |
10737 | ret = ctype_int; | |
10738 | } | |
10739 | else if (ctype_isInt (tr2)) | |
10740 | { | |
10741 | ret = te1; | |
10742 | } | |
10743 | else | |
10744 | { | |
10745 | ret = ctype_unknown; | |
10746 | } | |
10747 | } | |
10748 | else if (ctype_isPointer (tr2)) | |
10749 | { | |
10750 | if (ctype_isPointer (tr1)) | |
10751 | { | |
10752 | ret = ctype_int; | |
10753 | } | |
10754 | else if (ctype_isInt (tr1)) | |
10755 | { | |
10756 | ret = te2; | |
10757 | } | |
10758 | else | |
10759 | { | |
10760 | ret = ctype_unknown; | |
10761 | } | |
10762 | } | |
10763 | else | |
10764 | { | |
10765 | ret = ctype_resolveNumerics (tr1, tr2); | |
10766 | } | |
10767 | } | |
10768 | else | |
10769 | { | |
10770 | int opid = lltok_getTok (op); | |
10771 | bool comparop = (opid == EQ_OP || opid == NE_OP | |
10772 | || opid == TLT || opid == TGT | |
10773 | || opid == LE_OP || opid == GE_OP); | |
10774 | ||
10775 | if (!ctype_isNumeric (tr1) && !ctype_isNumeric (tr2)) | |
10776 | { | |
10777 | if (comparop | |
10778 | && ((ctype_isEnum (tr1) && ctype_isEnum (tr2)) | |
10779 | || (ctype_isBool (tr1) && ctype_isBool (tr2)) | |
10780 | || (ctype_isChar (tr1) && ctype_isChar (tr2)))) | |
10781 | { | |
10782 | ; /* no error */ | |
10783 | } | |
10784 | else | |
10785 | { | |
10786 | if (ctype_sameName (te1, te2)) | |
10787 | { | |
10788 | voptgenerror | |
10789 | (FLG_STRICTOPS, | |
10790 | message ("Operands of %s are non-numeric (%t): %s %s %s", | |
10791 | lltok_unparse (op), te1, | |
10792 | exprNode_unparse (e1), lltok_unparse (op), | |
10793 | exprNode_unparse (e2)), | |
10794 | e1->loc); | |
10795 | } | |
10796 | else | |
10797 | { | |
10798 | voptgenerror | |
10799 | (FLG_STRICTOPS, | |
10800 | message ("Operands of %s are non-numerics (%t, %t): %s %s %s", | |
10801 | lltok_unparse (op), te1, te2, | |
10802 | exprNode_unparse (e1), lltok_unparse (op), | |
10803 | exprNode_unparse (e2)), | |
10804 | e1->loc); | |
10805 | } | |
10806 | } | |
10807 | } | |
10808 | else if (!ctype_isNumeric (tr1)) | |
10809 | { | |
10810 | voptgenerror | |
10811 | (FLG_STRICTOPS, | |
10812 | message ("Right operand of %s is non-numeric (%t): %s %s %s", | |
10813 | lltok_unparse (op), te1, | |
10814 | exprNode_unparse (e1), lltok_unparse (op), | |
10815 | exprNode_unparse (e2)), | |
10816 | e1->loc); | |
10817 | } | |
10818 | else | |
10819 | { | |
10820 | if (!ctype_isNumeric (tr2)) | |
10821 | { | |
10822 | voptgenerror | |
10823 | (FLG_STRICTOPS, | |
10824 | message ("Left operand of %s is non-numeric (%t): %s %s %s", | |
10825 | lltok_unparse (op), te2, | |
10826 | exprNode_unparse (e1), lltok_unparse (op), | |
10827 | exprNode_unparse (e2)), | |
10828 | e2->loc); | |
10829 | } | |
10830 | } | |
10831 | ||
10832 | ret = ctype_unknown; | |
10833 | } | |
10834 | } | |
10835 | ||
10836 | return ret; | |
10837 | } | |
10838 | ||
10839 | static bool | |
10840 | abstractOpError (ctype tr1, ctype tr2, lltok op, | |
10841 | /*@notnull@*/ exprNode e1, /*@notnull@*/ exprNode e2, | |
10842 | fileloc loc1, fileloc loc2) | |
10843 | { | |
10844 | if (ctype_isRealAbstract (tr1) && ctype_isRealAbstract (tr2)) | |
10845 | { | |
10846 | if (ctype_match (tr1, tr2)) | |
10847 | { | |
10848 | if (ctype_isRealNumAbstract (tr1)) | |
10849 | { | |
10850 | ; /* No warning for numabstract types */ | |
10851 | } | |
10852 | else | |
10853 | { | |
10854 | if (lltok_isEqOp (op) || lltok_isNotEqOp (op)) | |
10855 | { | |
10856 | return optgenerror | |
10857 | (FLG_ABSTRACTCOMPARE, | |
10858 | message ("Object equality comparison (%s) on objects of abstract type (%t): %s %s %s", | |
10859 | lltok_unparse (op), tr1, | |
10860 | exprNode_unparse (e1), lltok_unparse (op), exprNode_unparse (e2)), | |
10861 | loc1); | |
10862 | } | |
10863 | else | |
10864 | { | |
10865 | return optgenerror | |
10866 | (FLG_ABSTRACT, | |
10867 | message ("Operands of %s are abstract type (%t): %s %s %s", | |
10868 | lltok_unparse (op), tr1, | |
10869 | exprNode_unparse (e1), lltok_unparse (op), exprNode_unparse (e2)), | |
10870 | loc1); | |
10871 | } | |
10872 | } | |
10873 | } | |
10874 | else | |
10875 | { | |
10876 | if (ctype_isRealNumAbstract (tr1) && ctype_isRealNumAbstract (tr2)) | |
10877 | { | |
10878 | return optgenerror | |
10879 | (FLG_NUMABSTRACT, | |
10880 | message | |
10881 | ("Operands of %s are different numabstract types (%t, %t): %s %s %s", | |
10882 | lltok_unparse (op), tr1, tr2, | |
10883 | exprNode_unparse (e1), | |
10884 | lltok_unparse (op), exprNode_unparse (e2)), | |
10885 | loc1); | |
10886 | } | |
10887 | else | |
10888 | { | |
10889 | return optgenerror | |
10890 | (FLG_ABSTRACT, | |
10891 | message ("Operands of %s are abstract types (%t, %t): %s %s %s", | |
10892 | lltok_unparse (op), tr1, tr2, | |
10893 | exprNode_unparse (e1), lltok_unparse (op), | |
10894 | exprNode_unparse (e2)), | |
10895 | loc1); | |
10896 | } | |
10897 | } | |
10898 | } | |
10899 | else if (ctype_isRealAbstract (tr1) && !ctype_isRealNumAbstract (tr1)) | |
10900 | { | |
10901 | return optgenerror | |
10902 | (FLG_ABSTRACT, | |
10903 | message ("Left operand of %s is abstract type (%t): %s %s %s", | |
10904 | lltok_unparse (op), tr1, | |
10905 | exprNode_unparse (e1), lltok_unparse (op), exprNode_unparse (e2)), | |
10906 | loc1); | |
10907 | } | |
10908 | else | |
10909 | { | |
10910 | if (ctype_isRealAbstract (tr2) && !ctype_isRealNumAbstract (tr2)) | |
10911 | { | |
10912 | return optgenerror | |
10913 | (FLG_ABSTRACT, | |
10914 | message ("Right operand of %s is abstract type (%t): %s %s %s", | |
10915 | lltok_unparse (op), tr2, | |
10916 | exprNode_unparse (e1), lltok_unparse (op), exprNode_unparse (e2)), | |
10917 | loc2); | |
10918 | } | |
10919 | } | |
10920 | ||
10921 | return FALSE; | |
10922 | } | |
10923 | ||
10924 | /* | |
10925 | ** e1 <= e2 | |
10926 | ** | |
10927 | ** requies e1 and e2 and not error exprNode's. | |
10928 | ** | |
10929 | ** Checks: | |
10930 | ** | |
10931 | ** If e1 is a component of an abstract type, and e2 is mutable and client-visible, | |
10932 | ** the rep of the abstract type is exposed. | |
10933 | ** | |
10934 | ** The order is very important: | |
10935 | ** | |
10936 | ** check rep expose (move into check transfer) | |
10937 | ** check transfer | |
10938 | ** setup aliases | |
10939 | */ | |
10940 | ||
10941 | /* | |
10942 | ** This isn't really a sensible procedure, but the indententation | |
10943 | ** was getting too deep. | |
10944 | */ | |
10945 | ||
10946 | static void | |
10947 | checkOneRepExpose (sRef ysr, sRef base, | |
10948 | /*@notnull@*/ exprNode e1, | |
10949 | /*@notnull@*/ exprNode e2, ctype ct, | |
10950 | sRef s2b) | |
10951 | { | |
10952 | if (!(sRef_isOnly (ysr) || sRef_isKeep (ysr) | |
10953 | || sRef_isOwned (ysr) | |
10954 | || sRef_isExposed (ysr))) | |
10955 | { | |
10956 | if (sRef_isAnyParam (base) && !sRef_isExposed (base) | |
10957 | && !sRef_isObserver (base)) /* evans 2001-07-11: added isObserver */ | |
10958 | ||
10959 | { | |
10960 | if (sRef_isIReference (ysr)) | |
10961 | { | |
10962 | if (sRef_sameName (base, sRef_getRootBase (e2->sref))) | |
10963 | { | |
10964 | voptgenerror | |
10965 | (FLG_ASSIGNEXPOSE, | |
10966 | message | |
10967 | ("Assignment of mutable component of parameter %q " | |
10968 | "to component of abstract " | |
10969 | "type %s exposes rep: %s = %s", | |
10970 | sRef_unparse (base), | |
10971 | ctype_unparse (ct), | |
10972 | exprNode_unparse (e1), exprNode_unparse (e2)), | |
10973 | e1->loc); | |
10974 | } | |
10975 | else | |
10976 | { | |
10977 | voptgenerror | |
10978 | (FLG_ASSIGNEXPOSE, | |
10979 | message | |
10980 | ("Assignment of mutable component of parameter %q " | |
10981 | "(through alias %q) to component of abstract " | |
10982 | "type %s exposes rep: %s = %s", | |
10983 | sRef_unparse (base), | |
10984 | sRef_unparse (e2->sref), | |
10985 | ctype_unparse (ct), | |
10986 | exprNode_unparse (e1), exprNode_unparse (e2)), | |
10987 | e1->loc); | |
10988 | } | |
10989 | } | |
10990 | else | |
10991 | { | |
10992 | if (sRef_sameName (base, sRef_getRootBase (e2->sref))) | |
10993 | { | |
10994 | voptgenerror | |
10995 | (FLG_ASSIGNEXPOSE, | |
10996 | message ("Assignment of mutable parameter %q " | |
10997 | "to component of abstract type %s " | |
10998 | "exposes rep: %s = %s", | |
10999 | sRef_unparse (base), | |
11000 | ctype_unparse (ct), | |
11001 | exprNode_unparse (e1), | |
11002 | exprNode_unparse (e2)), | |
11003 | e1->loc); | |
11004 | } | |
11005 | else | |
11006 | { | |
11007 | voptgenerror | |
11008 | (FLG_ASSIGNEXPOSE, | |
11009 | message ("Assignment of mutable parameter %q " | |
11010 | "(through alias %q) to " | |
11011 | "component of abstract type %s exposes " | |
11012 | "rep: %s = %s", | |
11013 | sRef_unparse (base), | |
11014 | sRef_unparse (e2->sref), | |
11015 | ctype_unparse (ct), | |
11016 | exprNode_unparse (e1), | |
11017 | exprNode_unparse (e2)), | |
11018 | e1->loc); | |
11019 | } | |
11020 | } | |
11021 | } | |
11022 | ||
11023 | if (sRef_isFileOrGlobalScope (s2b)) | |
11024 | { | |
11025 | if (sRef_sameName (base, sRef_getRootBase (e2->sref))) | |
11026 | { | |
11027 | voptgenerror | |
11028 | (FLG_REPEXPOSE, | |
11029 | message ("Assignment of global %q " | |
11030 | "to component of " | |
11031 | "abstract type %s exposes rep: %s = %s", | |
11032 | sRef_unparse (base), | |
11033 | ctype_unparse (ct), | |
11034 | exprNode_unparse (e1), exprNode_unparse (e2)), | |
11035 | e1->loc); | |
11036 | } | |
11037 | else | |
11038 | { | |
11039 | voptgenerror | |
11040 | (FLG_REPEXPOSE, | |
11041 | message ("Assignment of global %q (through alias %q) " | |
11042 | "to component of " | |
11043 | "abstract type %s exposes rep: %s = %s", | |
11044 | sRef_unparse (base), | |
11045 | sRef_unparse (e2->sref), | |
11046 | ctype_unparse (ct), | |
11047 | exprNode_unparse (e1), exprNode_unparse (e2)), | |
11048 | e1->loc); | |
11049 | } | |
11050 | } | |
11051 | } | |
11052 | } | |
11053 | ||
11054 | static void | |
11055 | doAssign (/*@notnull@*/ exprNode e1, /*@notnull@*/ exprNode e2, bool isInit) | |
11056 | { | |
11057 | DPRINTF (("Do assign: %s <- %s", | |
11058 | exprNode_unparse (e1), exprNode_unparse (e2))); | |
11059 | DPRINTF (("Ctype: %s", ctype_unparse (exprNode_getType (e1)))); | |
11060 | ||
11061 | if (ctype_isRealFunction (exprNode_getType (e1)) | |
11062 | && !ctype_isRealPointer (exprNode_getType (e1))) | |
11063 | { | |
11064 | voptgenerror | |
11065 | (FLG_TYPE, | |
11066 | message ("Invalid left-hand side of assignment (function type %s): %s", | |
11067 | ctype_unparse (exprNode_getType (e1)), | |
11068 | exprNode_unparse (e1)), | |
11069 | e1->loc); | |
11070 | } | |
11071 | ||
11072 | if (context_getFlag (FLG_ASSIGNEXPOSE) && ctype_isMutable (e2->typ)) | |
11073 | { | |
11074 | ctype t2 = exprNode_getType (e2); | |
11075 | sRef sr = sRef_getRootBase (e1->sref); | |
11076 | ctype ct = sRef_getType (sr); | |
11077 | ||
11078 | if (ctype_isAbstract (t2) | |
11079 | && !ctype_isNumAbstract (t2) | |
11080 | && !(uentry_isMutableDatatype (usymtab_getTypeEntry (ctype_typeId (t2))))) | |
11081 | { | |
11082 | /* it is immutable, okay to reference */ | |
11083 | goto donerepexpose; | |
11084 | } | |
11085 | ||
11086 | if (ctype_isAbstract (ct) && sRef_isIReference (e1->sref)) | |
11087 | { | |
11088 | sRef s2b = sRef_getRootBase (e2->sref); | |
11089 | sRef s1 = e1->sref; | |
11090 | sRef s1b = sRef_getRootBase (s1); | |
11091 | sRefSet aliases; | |
11092 | ||
11093 | aliases = usymtab_canAlias (e2->sref); | |
11094 | ||
11095 | if (!sRef_similar (s2b, s1b) | |
11096 | && !sRef_isExposed (s1) | |
11097 | && !(sRef_isOnly (s2b) || sRef_isKeep (s2b) || sRef_isExposed (s2b))) | |
11098 | { | |
11099 | if (sRef_isAnyParam (s2b) && !sRef_isOnly (s2b) | |
11100 | && !sRef_isOwned (s2b) && !sRef_isKeep (s2b) | |
11101 | && !sRef_isExposed (s2b)) | |
11102 | { | |
11103 | if (sRef_isIReference (e2->sref)) | |
11104 | { | |
11105 | voptgenerror | |
11106 | (FLG_ASSIGNEXPOSE, | |
11107 | message | |
11108 | ("Assignment of mutable component of parameter %q " | |
11109 | "to component of abstract type %s exposes rep: %s = %s", | |
11110 | sRef_unparse (s2b), | |
11111 | ctype_unparse (ct), | |
11112 | exprNode_unparse (e1), exprNode_unparse (e2)), | |
11113 | e1->loc); | |
11114 | } | |
11115 | else | |
11116 | { | |
11117 | voptgenerror | |
11118 | (FLG_ASSIGNEXPOSE, | |
11119 | message ("Assignment of mutable parameter %q to " | |
11120 | "component of abstract type %s exposes rep: %s = %s", | |
11121 | sRef_unparse (s2b), | |
11122 | ctype_unparse (ct), | |
11123 | exprNode_unparse (e1), exprNode_unparse (e2)), | |
11124 | e1->loc); | |
11125 | } | |
11126 | } | |
11127 | ||
11128 | if (sRef_isFileOrGlobalScope (s2b)) | |
11129 | { | |
11130 | voptgenerror | |
11131 | (FLG_ASSIGNEXPOSE, | |
11132 | message ("Assignment of global %q to component of " | |
11133 | "abstract type %s exposes rep: %s = %s", | |
11134 | sRef_unparse (s2b), | |
11135 | ctype_unparse (ct), | |
11136 | exprNode_unparse (e1), exprNode_unparse (e2)), | |
11137 | e1->loc); | |
11138 | } | |
11139 | ||
11140 | sRefSet_realElements (aliases, ysr) | |
11141 | { | |
11142 | sRef base = sRef_getRootBase (ysr); | |
11143 | ||
11144 | if (sRef_similar (ysr, s2b) || sRef_similar (s1b, base) | |
11145 | || sRef_sameName (base, s1b)) | |
11146 | { | |
11147 | ; /* error already reported or same sref */ | |
11148 | } | |
11149 | else | |
11150 | { | |
11151 | checkOneRepExpose (ysr, base, e1, e2, ct, s2b); | |
11152 | } | |
11153 | } end_sRefSet_realElements; | |
11154 | } | |
11155 | sRefSet_free (aliases); | |
11156 | } | |
11157 | } | |
11158 | ||
11159 | donerepexpose: | |
11160 | ||
11161 | /* | |
11162 | ** function variables don't really work... | |
11163 | */ | |
11164 | ||
11165 | if (!ctype_isFunction (ctype_realType (e2->typ))) | |
11166 | { | |
11167 | if (isInit) | |
11168 | { | |
11169 | DPRINTF (("Check init: %s / %s", | |
11170 | exprNode_unparse (e1), exprNode_unparse (e2))); | |
11171 | transferChecks_initialization (e1, e2); | |
11172 | } | |
11173 | else | |
11174 | { | |
11175 | transferChecks_assign (e1, e2); | |
11176 | } | |
11177 | } | |
11178 | else | |
11179 | { | |
11180 | sRef fref = e2->sref; | |
11181 | ||
11182 | sRef_setDefState (e1->sref, sRef_getDefState (fref), e1->loc); | |
11183 | sRef_setNullState (e1->sref, sRef_getNullState (fref), e1->loc); | |
11184 | ||
11185 | /* Need to typecheck the annotation on the parameters */ | |
11186 | ||
11187 | if (ctype_isRealFunction (e1->typ)) { | |
11188 | uentryList e1p = ctype_argsFunction (ctype_realType (e1->typ)); | |
11189 | uentryList e2p = ctype_argsFunction (ctype_realType (e2->typ)); | |
11190 | ||
11191 | if (!uentryList_isMissingParams (e1p) | |
11192 | && !uentryList_isMissingParams (e2p) | |
11193 | && uentryList_size (e1p) > 0) { | |
11194 | if (uentryList_size (e1p) == uentryList_size (e2p)) { | |
11195 | int n = 0; | |
11196 | ||
11197 | uentryList_elements (e1p, el1) { | |
11198 | uentry el2; | |
11199 | ||
11200 | el2 = uentryList_getN (e2p, n); | |
11201 | n++; | |
11202 | uentry_checkMatchParam (el1, el2, n, e2); | |
11203 | } end_uentryList_elements; | |
11204 | } | |
11205 | } | |
11206 | } | |
11207 | } | |
11208 | ||
11209 | if (exprNode_isStringLiteral (e2)) | |
11210 | { | |
11211 | exprNode_checkStringLiteralLength (exprNode_getType (e1), e2); | |
11212 | } | |
11213 | ||
11214 | if (isInit && sRef_isFileOrGlobalScope (e1->sref)) | |
11215 | { | |
11216 | ; | |
11217 | } | |
11218 | else | |
11219 | { | |
11220 | DPRINTF (("Update aliases: %s / %s", exprNode_unparse (e1), exprNode_unparse (e2))); | |
11221 | updateAliases (e1, e2); | |
11222 | } | |
11223 | } | |
11224 | ||
11225 | static void | |
11226 | checkMacroParen (exprNode e) | |
11227 | { | |
11228 | if (exprNode_isError (e) || e->kind == XPR_CAST) | |
11229 | { | |
11230 | ; | |
11231 | } | |
11232 | else | |
11233 | { | |
11234 | if (sRef_isUnsafe (e->sref) && !exprNode_isInParens (e)) | |
11235 | { | |
11236 | voptgenerror | |
11237 | (FLG_MACROPARENS, | |
11238 | message ("Macro parameter used without parentheses: %s", | |
11239 | exprNode_unparse (e)), | |
11240 | e->loc); | |
11241 | } | |
11242 | } | |
11243 | } | |
11244 | ||
11245 | static void | |
11246 | reflectNullTest (/*@notnull@*/ exprNode e, bool isnull) | |
11247 | { | |
11248 | if (isnull) | |
11249 | { | |
11250 | e->guards = guardSet_addTrueGuard (e->guards, e->sref); | |
11251 | } | |
11252 | else | |
11253 | { | |
11254 | e->guards = guardSet_addFalseGuard (e->guards, e->sref); | |
11255 | } | |
11256 | } | |
11257 | ||
11258 | /* | |
11259 | ** e1 <= e2 | |
11260 | ** | |
11261 | ** if e2 is a parameter or global derived location which | |
11262 | ** can be modified (that is, e2 is a mutable abstract type, | |
11263 | ** or a derived pointer), then e1 can alias e2. | |
11264 | ** | |
11265 | ** e1 can alias everything which e2 can alias. | |
11266 | ** | |
11267 | ** Also, if e1 is guarded, remove from guard sets! | |
11268 | */ | |
11269 | ||
11270 | static void updateAliases (/*@notnull@*/ exprNode e1, /*@notnull@*/ exprNode e2) | |
11271 | { | |
11272 | if (!context_inProtectVars ()) | |
11273 | { | |
11274 | /* | |
11275 | ** depends on types of e1 and e2 | |
11276 | */ | |
11277 | ||
11278 | sRef s1 = e1->sref; | |
11279 | sRef s2 = e2->sref; | |
11280 | ctype t1 = exprNode_getType (e1); | |
11281 | ||
11282 | /* handle pointer sRefs, record fields, arrays, etc... */ | |
11283 | ||
11284 | if (!ctype_isRealSU (t1)) | |
11285 | { | |
11286 | DPRINTF (("Copying real! %s", ctype_unparse (t1))); | |
11287 | sRef_copyRealDerivedComplete (s1, s2); | |
11288 | } | |
11289 | else | |
11290 | { | |
11291 | /* | |
11292 | ** Fields should alias | |
11293 | */ | |
11294 | ||
11295 | DPRINTF (("Not COPYING!: %s", ctype_unparse (t1))); | |
11296 | } | |
11297 | ||
11298 | if (ctype_isMutable (t1) && sRef_isKnown (s1)) | |
11299 | { | |
11300 | usymtab_clearAlias (s1); | |
11301 | usymtab_addMustAlias (s1, s2); | |
11302 | DPRINTF (("Add must alias: %s / %s", sRef_unparse (s1), sRef_unparse (s2))); | |
11303 | } | |
11304 | else | |
11305 | { | |
11306 | DPRINTF (("Not mutable: %s", ctype_unparse (t1))); | |
11307 | } | |
11308 | ||
11309 | if (sRef_possiblyNull (s1) && usymtab_isGuarded (s1)) | |
11310 | { | |
11311 | usymtab_unguard (s1); | |
11312 | } | |
11313 | } | |
11314 | } | |
11315 | ||
11316 | exprNode exprNode_updateLocation (/*@returned@*/ exprNode e, /*@temp@*/ fileloc loc) | |
11317 | { | |
11318 | if (exprNode_isDefined (e)) | |
11319 | { | |
11320 | e->loc = fileloc_update (e->loc, loc); | |
11321 | } | |
11322 | else | |
11323 | { | |
11324 | e = exprNode_createLoc (ctype_unknown, fileloc_copy (loc)); | |
11325 | } | |
11326 | ||
11327 | return (e); | |
11328 | } | |
11329 | ||
11330 | static void checkUniqueParams (exprNode fcn, | |
11331 | /*@notnull@*/ exprNode current, | |
11332 | exprNodeList args, | |
11333 | int paramno, uentry ucurrent) | |
11334 | { | |
11335 | int iparamno = 0; | |
11336 | sRef thisref = exprNode_getSref (current); | |
11337 | ||
11338 | /* | |
11339 | ** Check if any argument could match this argument. | |
11340 | */ | |
11341 | ||
11342 | exprNodeList_elements (args, icurrent) | |
11343 | { | |
11344 | iparamno++; | |
11345 | ||
11346 | if (iparamno != paramno) | |
11347 | { | |
11348 | sRef sr = exprNode_getSref (icurrent); | |
11349 | ||
11350 | if (sRef_similarRelaxed (thisref, sr)) | |
11351 | { | |
11352 | if (!sRef_isConst (thisref) && !sRef_isConst (sr)) | |
11353 | { | |
11354 | voptgenerror | |
11355 | (FLG_ALIASUNIQUE, | |
11356 | message | |
11357 | ("Parameter %d (%s) to function %s is declared %s but " | |
11358 | "is aliased by parameter %d (%s)", | |
11359 | paramno, | |
11360 | exprNode_unparse (current), | |
11361 | exprNode_unparse (fcn), | |
11362 | alkind_unparse (uentry_getAliasKind (ucurrent)), | |
11363 | iparamno, exprNode_unparse (icurrent)), | |
11364 | current->loc); | |
11365 | } | |
11366 | } | |
11367 | else | |
11368 | { | |
11369 | sRefSet aliases = usymtab_canAlias (sr); | |
11370 | ||
11371 | sRefSet_allElements (aliases, asr) | |
11372 | { | |
11373 | if (ctype_isUnknown (sRef_getType (thisref))) | |
11374 | { | |
11375 | sRef_setType (thisref, uentry_getType (ucurrent)); | |
11376 | } | |
11377 | ||
11378 | if (sRef_similarRelaxed (thisref, asr)) | |
11379 | { | |
11380 | if (sRef_isExternal (asr)) | |
11381 | { | |
11382 | if (sRef_isLocalState (thisref)) | |
11383 | { | |
11384 | ; /* okay */ | |
11385 | } | |
11386 | else | |
11387 | { | |
11388 | sRef base = sRef_getRootBase (asr); | |
11389 | ||
11390 | if (!sRef_similar (sRef_getBase (asr), thisref)) | |
11391 | { | |
11392 | if (sRef_isUnique (base) || sRef_isOnly (base) | |
11393 | || sRef_isKept (base) | |
11394 | || (sRef_isAddress (asr) && sRef_isLocalVar (base)) | |
11395 | || (sRef_isAddress (thisref) | |
11396 | && sRef_isLocalVar (sRef_getRootBase (thisref)))) | |
11397 | { | |
11398 | ; /* okay, no error */ | |
11399 | } | |
11400 | else | |
11401 | { | |
11402 | voptgenerror | |
11403 | (FLG_MAYALIASUNIQUE, | |
11404 | message | |
11405 | ("Parameter %d (%s) to function %s is declared %s but " | |
11406 | "may be aliased externally by parameter %d (%s)", | |
11407 | paramno, | |
11408 | exprNode_unparse (current), | |
11409 | exprNode_unparse (fcn), | |
11410 | alkind_unparse (uentry_getAliasKind (ucurrent)), | |
11411 | iparamno, exprNode_unparse (icurrent)), | |
11412 | current->loc); | |
11413 | } | |
11414 | } | |
11415 | } | |
11416 | } | |
11417 | else | |
11418 | { | |
11419 | voptgenerror | |
11420 | (FLG_ALIASUNIQUE, | |
11421 | message | |
11422 | ("Parameter %d (%s) to function %s is declared %s but " | |
11423 | "is aliased externally by parameter %d (%s) through " | |
11424 | "alias %q", | |
11425 | paramno, | |
11426 | exprNode_unparse (current), | |
11427 | exprNode_unparse (fcn), | |
11428 | alkind_unparse (uentry_getAliasKind (ucurrent)), | |
11429 | iparamno, exprNode_unparse (icurrent), | |
11430 | sRef_unparse (asr)), | |
11431 | current->loc); | |
11432 | } | |
11433 | } | |
11434 | } end_sRefSet_allElements; | |
11435 | sRefSet_free (aliases); | |
11436 | } | |
11437 | } | |
11438 | } end_exprNodeList_elements; | |
11439 | } | |
11440 | ||
11441 | long exprNode_getLongValue (exprNode e) { | |
11442 | long value; | |
11443 | ||
11444 | if (exprNode_hasValue (e) | |
11445 | && multiVal_isInt (exprNode_getValue (e))) | |
11446 | { | |
11447 | value = multiVal_forceInt (exprNode_getValue (e)); | |
11448 | } | |
11449 | else | |
11450 | { | |
11451 | /*@!! BADBRANCH;*/ | |
11452 | value = 0; | |
11453 | } | |
11454 | ||
11455 | return value; | |
11456 | } | |
11457 | ||
11458 | /*@observer@*/ fileloc exprNode_getfileloc (exprNode p_e) | |
11459 | { | |
11460 | if (exprNode_isDefined (p_e) ) | |
11461 | return ( p_e->loc ); | |
11462 | else | |
11463 | return fileloc_undefined; | |
11464 | } | |
11465 | ||
11466 | /*@only@*/ fileloc exprNode_getNextSequencePoint (exprNode e) | |
11467 | { | |
11468 | /* | |
11469 | ** Returns the location of the sequence point following e. | |
11470 | ** | |
11471 | ** Only works for statements (for now). | |
11472 | */ | |
11473 | ||
11474 | if (exprNode_isDefined (e) && e->kind == XPR_STMT) { | |
11475 | lltok t = exprData_getUopTok (e->edata); | |
11476 | return fileloc_copy(lltok_getLoc (t)); | |
11477 | } else { | |
11478 | /* drl possible problem : warning fix | |
11479 | llcontbug (message ("Cannot get next sequence point: %s", exprNode_unparse (e))); | |
11480 | */ | |
11481 | return fileloc_undefined; | |
11482 | } | |
11483 | } | |
11484 | ||
11485 | exprNode exprNode_createNew(ctype c) | |
11486 | { | |
11487 | exprNode ret; | |
11488 | ||
11489 | ret = exprNode_createPlain (c); | |
11490 | ||
11491 | return ret; | |
11492 | } | |
11493 | ||
11494 | bool exprNode_isInitBlock (exprNode e) | |
11495 | { | |
11496 | return (exprNode_isDefined(e) && e->kind == XPR_INITBLOCK); | |
11497 | } | |
11498 | ||
11499 | /*drl 3/2/2003 moved this function out of constraint.c */ | |
11500 | exprNode exprNode_copyConstraints (/*@returned@*/ exprNode dst, exprNode src) | |
11501 | { | |
11502 | ||
11503 | llassert (exprNode_isDefined (dst) ); | |
11504 | llassert (exprNode_isDefined (src) ); | |
11505 | ||
11506 | constraintList_free (dst->ensuresConstraints); | |
11507 | constraintList_free (dst->requiresConstraints); | |
11508 | constraintList_free (dst->trueEnsuresConstraints); | |
11509 | constraintList_free (dst->falseEnsuresConstraints); | |
11510 | ||
11511 | dst->ensuresConstraints = constraintList_copy (src->ensuresConstraints); | |
11512 | dst->requiresConstraints = constraintList_copy (src->requiresConstraints); | |
11513 | dst->trueEnsuresConstraints = constraintList_copy (src->trueEnsuresConstraints); | |
11514 | dst->falseEnsuresConstraints = constraintList_copy (src->falseEnsuresConstraints); | |
11515 | return dst; | |
11516 | } |