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1 | /* | |
2 | ** Splint - annotation-assisted static program checker | |
3 | ** Copyright (C) 1994-2002 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 "cgrammar_tokens.h" | |
33 | ||
34 | # include "exprChecks.h" | |
35 | # include "transferChecks.h" | |
36 | # include "exprNodeSList.h" | |
37 | ||
38 | static bool exprNode_sameStorage (exprNode p_e1, exprNode p_e2) /*@*/ ; | |
39 | static bool exprNode_isEmptyStatement (exprNode p_e); | |
40 | static /*@exposed@*/ exprNode exprNode_firstStatement (/*@returned@*/ exprNode p_e); | |
41 | static bool exprNode_isFalseConstant (exprNode p_e) /*@*/ ; | |
42 | static bool exprNode_isBlock (exprNode p_e); | |
43 | static void checkGlobUse (uentry p_glob, bool p_isCall, /*@notnull@*/ exprNode p_e); | |
44 | static void exprNode_addUse (exprNode p_e, /*@exposed@*/ sRef p_s); | |
45 | static bool exprNode_matchArgType (ctype p_ct, exprNode p_e); | |
46 | static exprNode exprNode_fakeCopy (exprNode p_e) /*@*/ ; | |
47 | static exprNode exprNode_statementError (/*@only@*/ exprNode p_e, /*@only@*/ lltok p_t); | |
48 | static bool exprNode_matchTypes (exprNode p_e1, exprNode p_e2); | |
49 | static void checkUniqueParams (exprNode p_fcn, | |
50 | /*@notnull@*/ exprNode p_current, exprNodeList p_args, | |
51 | int p_paramno, uentry p_ucurrent); | |
52 | static void updateAliases (/*@notnull@*/ exprNode p_e1, /*@notnull@*/ exprNode p_e2); | |
53 | static void abstractOpError (ctype p_tr1, ctype p_tr2, lltok p_op, | |
54 | /*@notnull@*/ exprNode p_e1, /*@notnull@*/ exprNode p_e2, | |
55 | fileloc p_loc1, fileloc p_loc2); | |
56 | static ctype checkNumerics (ctype p_tr1, ctype p_tr2, ctype p_te1, ctype p_te2, | |
57 | /*@notnull@*/ exprNode p_e1, /*@notnull@*/ exprNode p_e2, lltok p_op); | |
58 | static void doAssign (/*@notnull@*/ exprNode p_e1, /*@notnull@*/ exprNode p_e2, bool p_isInit); | |
59 | static void checkSafeUse (exprNode p_e, /*@exposed@*/ sRef p_s); | |
60 | static void reflectNullTest (/*@notnull@*/ exprNode p_e, bool p_isnull); | |
61 | static void checkMacroParen (exprNode p_e); | |
62 | static exprNodeSList exprNode_flatten (/*@dependent@*/ exprNode p_e); | |
63 | static void exprNode_checkSetAny (exprNode p_e, /*@dependent@*/ cstring p_name); | |
64 | static void exprNode_checkUse (exprNode p_e, /*@exposed@*/ sRef p_s, fileloc p_loc); | |
65 | static void exprNode_mergeUSs (exprNode p_res, exprNode p_other); | |
66 | static void exprNode_mergeCondUSs (exprNode p_res, exprNode p_other1, exprNode p_other2); | |
67 | static /*@only@*/ /*@notnull@*/ exprNode exprNode_fromIdentifierAux (/*@observer@*/ uentry p_c); | |
68 | static void checkAnyCall (/*@notnull@*/ /*@dependent@*/ exprNode p_fcn, | |
69 | /*@dependent@*/ cstring p_fname, | |
70 | uentryList p_pn, exprNodeList p_args, | |
71 | bool p_hasMods, sRefSet p_mods, bool p_isSpec, | |
72 | int p_specialArgs); | |
73 | static void checkOneArg (uentry p_ucurrent, /*@notnull@*/ exprNode p_current, | |
74 | /*@dependent@*/ exprNode p_fcn, bool p_isSpec, int p_argno, int p_totargs); | |
75 | static void | |
76 | checkUnspecCall (/*@notnull@*/ /*@dependent@*/ exprNode p_fcn, uentryList p_params, exprNodeList p_args); | |
77 | ||
78 | static /*@only@*/ exprNode exprNode_effect (exprNode p_e) | |
79 | /*@globals internalState@*/ ; | |
80 | static /*@only@*/ cstring exprNode_doUnparse (exprNode p_e); | |
81 | static /*@observer@*/ cstring exprNode_rootVarName (exprNode p_e); | |
82 | static /*@exposed@*/ exprNode | |
83 | exprNode_lastStatement (/*@returned@*/ exprNode p_e); | |
84 | ||
85 | static /*@null@*/ sRef defref = sRef_undefined; | |
86 | static /*@only@*/ exprNode mustExitNode = exprNode_undefined; | |
87 | ||
88 | static int checkArgsReal (uentry p_fcn, /*@dependent@*/ exprNode p_f, | |
89 | uentryList p_cl, | |
90 | exprNodeList p_args, bool p_isIter, exprNode p_ret); | |
91 | ||
92 | static bool inEffect = FALSE; | |
93 | static int nowalloc = 0; | |
94 | static int totalloc = 0; | |
95 | static int maxalloc = 0; | |
96 | ||
97 | static /*@only@*/ uentry regArg; | |
98 | static /*@only@*/ uentry outArg; | |
99 | static /*@only@*/ uentry outStringArg; | |
100 | static /*@exposed@*/ sRef stdinRef; | |
101 | static /*@exposed@*/ sRef stdoutRef; | |
102 | static /*@only@*/ uentry csArg; | |
103 | static /*@only@*/ uentry csOnlyArg; | |
104 | static ctype cstringType; | |
105 | static ctype ctypeType; | |
106 | static ctype filelocType; | |
107 | static bool initMod = FALSE; | |
108 | ||
109 | /*@function void exprNode_swap (sef exprNode, sef exprNode)@*/ | |
110 | /*@-macroassign@*/ | |
111 | # define exprNode_swap(e1,e2) do { exprNode m_tmp = (e1); (e1) = (e2); (e2) = m_tmp; } while (FALSE) | |
112 | /*@=macroassign@*/ | |
113 | ||
114 | static void exprNode_defineConstraints(/*@sef@*/ /*@special@*/ /*@notnull@*/ exprNode e) | |
115 | /*@defines e->requiresConstraints, e->ensuresConstraints, | |
116 | e->trueEnsuresConstraints, e->falseEnsuresConstraints @*/ | |
117 | { | |
118 | e->requiresConstraints = constraintList_makeNew (); | |
119 | e->ensuresConstraints = constraintList_makeNew (); | |
120 | e->trueEnsuresConstraints = constraintList_makeNew (); | |
121 | e->falseEnsuresConstraints = constraintList_makeNew (); | |
122 | } | |
123 | ||
124 | /* | |
125 | ** must occur after library has been read | |
126 | */ | |
127 | ||
128 | void exprNode_initMod (void) | |
129 | /*@globals undef regArg, undef outArg, undef outStringArg, | |
130 | undef csOnlyArg, undef csArg; | |
131 | @*/ | |
132 | { | |
133 | uentry ue; | |
134 | idDecl tmp; | |
135 | ||
136 | initMod = TRUE; | |
137 | cstringType = ctype_unknown; | |
138 | ctypeType = ctype_unknown; | |
139 | filelocType = ctype_unknown; | |
140 | ||
141 | defref = sRef_undefined; | |
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 mustExitNode, initMod @*/ | |
221 | { | |
222 | if (initMod) | |
223 | { | |
224 | uentry_free (regArg); | |
225 | uentry_free (outArg); | |
226 | uentry_free (outStringArg); | |
227 | ||
228 | exprNode_free (mustExitNode); | |
229 | initMod = FALSE; | |
230 | /*@-branchstate@*/ | |
231 | } | |
232 | /*@=branchstate@*/ | |
233 | } | |
234 | ||
235 | static void exprNode_resetSref (/*@notnull@*/ exprNode e) | |
236 | { | |
237 | e->sref = defref; | |
238 | } | |
239 | ||
240 | exprNode exprNode_fakeCopy (exprNode e) | |
241 | { | |
242 | /*@-temptrans@*/ /*@-retalias@*/ | |
243 | return e; | |
244 | /*@=temptrans@*/ /*@=retalias@*/ | |
245 | } | |
246 | ||
247 | static bool isFlagKey (char key) | |
248 | { | |
249 | return (key == '-' || key == '+' || key == ' ' || key == '#'); | |
250 | } | |
251 | ||
252 | static void exprNode_combineControl (/*@notnull@*/ exprNode ret, | |
253 | /*@notnull@*/ exprNode ifclause, | |
254 | /*@notnull@*/ exprNode elseclause) | |
255 | { | |
256 | ret->canBreak = ifclause->canBreak || elseclause->canBreak; | |
257 | ||
258 | ret->mustBreak = | |
259 | (ifclause->mustBreak || exprNode_mustEscape (ifclause)) | |
260 | && (elseclause->mustBreak || exprNode_mustEscape (elseclause)); | |
261 | ||
262 | ret->exitCode = exitkind_combine (ifclause->exitCode, | |
263 | elseclause->exitCode); | |
264 | ||
265 | } | |
266 | ||
267 | /* | |
268 | ** For exprNode's returned by exprNode_effect. | |
269 | */ | |
270 | ||
271 | static bool shallowKind (exprKind kind) | |
272 | { | |
273 | return (kind == XPR_STRINGLITERAL | |
274 | || kind == XPR_NUMLIT | |
275 | || kind == XPR_EMPTY | |
276 | || kind == XPR_BODY | |
277 | || kind == XPR_NODE); | |
278 | } | |
279 | ||
280 | static void | |
281 | exprNode_freeIniter (/*@only@*/ exprNode e) | |
282 | { | |
283 | if (!exprNode_isError (e)) | |
284 | { | |
285 | switch (e->kind) | |
286 | { | |
287 | case XPR_FACCESS: | |
288 | /* | |
289 | ** Its a fake copy, don't free the field->rec and field->field | |
290 | ** fields. | |
291 | */ | |
292 | ||
293 | /*@-compdestroy@*/ | |
294 | sfree (e->edata->field); | |
295 | /*@=compdestroy@*/ | |
296 | ||
297 | sfree (e->edata); | |
298 | break; | |
299 | case XPR_FETCH: | |
300 | exprNode_free (e->edata->op->b); | |
301 | /*@-compdestroy@*/ sfree (e->edata->op); /*@=compdestroy@*/ | |
302 | sfree (e->edata); | |
303 | break; | |
304 | default: | |
305 | llbug (message ("other: %s", exprNode_unparse (e))); | |
306 | } | |
307 | ||
308 | multiVal_free (e->val); | |
309 | cstring_free (e->etext); | |
310 | fileloc_free (e->loc); | |
311 | sRefSet_free (e->uses); | |
312 | sRefSet_free (e->sets); | |
313 | sRefSet_free (e->msets); | |
314 | guardSet_free (e->guards); | |
315 | ||
316 | constraintList_free(e->requiresConstraints); | |
317 | constraintList_free(e->ensuresConstraints); | |
318 | constraintList_free(e->trueEnsuresConstraints); | |
319 | constraintList_free(e->falseEnsuresConstraints); | |
320 | ||
321 | e->requiresConstraints = NULL; | |
322 | e->ensuresConstraints = NULL; | |
323 | e->trueEnsuresConstraints = NULL; | |
324 | e->falseEnsuresConstraints = NULL; | |
325 | ||
326 | sfree (e); | |
327 | } | |
328 | } | |
329 | ||
330 | void | |
331 | exprNode_freeShallow (/*@only@*/ exprNode e) | |
332 | { | |
333 | if (!exprNode_isError (e)) | |
334 | { | |
335 | if (shallowKind (e->kind)) | |
336 | { | |
337 | } | |
338 | else | |
339 | { | |
340 | if (!inEffect) | |
341 | { | |
342 | if (e->kind == XPR_EMPTY | |
343 | || e->kind == XPR_BODY | |
344 | || e->kind == XPR_STRINGLITERAL | |
345 | || e->kind == XPR_NUMLIT | |
346 | || e->kind == XPR_NODE | |
347 | || e->kind == XPR_OFFSETOF | |
348 | || e->kind == XPR_ALIGNOFT | |
349 | || e->kind == XPR_ALIGNOF | |
350 | || e->kind == XPR_SIZEOFT | |
351 | || e->kind == XPR_SIZEOF) | |
352 | { | |
353 | /* don't free anything */ | |
354 | } | |
355 | else | |
356 | { | |
357 | /* multiVal_free (e->val); */ | |
358 | cstring_free (e->etext); | |
359 | fileloc_free (e->loc); | |
360 | sRefSet_free (e->uses); | |
361 | sRefSet_free (e->sets); | |
362 | sRefSet_free (e->msets); | |
363 | guardSet_free (e->guards); | |
364 | exprData_freeShallow (e->edata, e->kind); | |
365 | nowalloc--; | |
366 | /*@-compdestroy@*/ sfree (e); /*@=compdestroy@*/ | |
367 | /*@-branchstate@*/ | |
368 | } | |
369 | } | |
370 | } /*@=branchstate@*/ | |
371 | } | |
372 | } | |
373 | ||
374 | void | |
375 | exprNode_free (exprNode e) | |
376 | { | |
377 | if (!exprNode_isError (e)) | |
378 | { | |
379 | if (!inEffect) | |
380 | { | |
381 | multiVal_free (e->val); | |
382 | cstring_free (e->etext); | |
383 | fileloc_free (e->loc); | |
384 | sRefSet_free (e->uses); | |
385 | sRefSet_free (e->sets); | |
386 | sRefSet_free (e->msets); | |
387 | guardSet_free (e->guards); | |
388 | exprData_free (e->edata, e->kind); | |
389 | ||
390 | constraintList_free(e->requiresConstraints); | |
391 | constraintList_free(e->ensuresConstraints); | |
392 | constraintList_free(e->trueEnsuresConstraints); | |
393 | constraintList_free(e->falseEnsuresConstraints); | |
394 | ||
395 | e->requiresConstraints = NULL; | |
396 | e->ensuresConstraints = NULL; | |
397 | e->trueEnsuresConstraints = NULL; | |
398 | e->falseEnsuresConstraints = NULL; | |
399 | ||
400 | nowalloc--; | |
401 | sfree (e); | |
402 | /*@-branchstate@*/ | |
403 | } /*@=branchstate@*/ | |
404 | } | |
405 | } | |
406 | ||
407 | exprNode | |
408 | exprNode_makeError () | |
409 | { | |
410 | return exprNode_undefined; | |
411 | } | |
412 | ||
413 | static /*@out@*/ /*@only@*/ /*@notnull@*/ exprNode | |
414 | exprNode_new (void) | |
415 | { | |
416 | exprNode ret = (exprNode) dmalloc (sizeof (*ret)); | |
417 | /* static int lastexpnodes = 0; */ | |
418 | ||
419 | nowalloc++; | |
420 | totalloc++; | |
421 | ||
422 | if (nowalloc > maxalloc) | |
423 | { | |
424 | maxalloc = nowalloc; | |
425 | } | |
426 | ||
427 | return ret; | |
428 | } | |
429 | ||
430 | static /*@notnull@*/ /*@special@*/ exprNode | |
431 | exprNode_createPlain (ctype c) | |
432 | /*@defines result@*/ | |
433 | /*@ensures isnull result->edata, result->loc, result->val, result->guards, | |
434 | result->uses, result->sets, result->msets, result->etext @*/ | |
435 | /*@*/ | |
436 | { | |
437 | exprNode e = exprNode_new (); | |
438 | ||
439 | e->typ = c; | |
440 | e->kind = XPR_EMPTY; | |
441 | e->val = multiVal_undefined; | |
442 | e->sref = defref; | |
443 | e->etext = cstring_undefined; | |
444 | e->loc = fileloc_undefined; | |
445 | e->guards = guardSet_undefined; | |
446 | e->uses = sRefSet_undefined; | |
447 | e->sets = sRefSet_undefined; | |
448 | e->msets = sRefSet_undefined; | |
449 | e->edata = exprData_undefined; | |
450 | e->exitCode = XK_NEVERESCAPE; | |
451 | e->canBreak = FALSE; | |
452 | e->mustBreak = FALSE; | |
453 | e->isJumpPoint = FALSE; | |
454 | ||
455 | exprNode_defineConstraints(e); | |
456 | ||
457 | return (e); | |
458 | } | |
459 | ||
460 | /*@observer@*/ exprNode exprNode_makeMustExit (void) | |
461 | { | |
462 | if (exprNode_isUndefined (mustExitNode)) | |
463 | { | |
464 | mustExitNode = exprNode_createPlain (ctype_unknown); | |
465 | mustExitNode->exitCode = XK_MUSTEXIT; | |
466 | } | |
467 | ||
468 | return mustExitNode; | |
469 | } | |
470 | ||
471 | ||
472 | static /*@notnull@*/ /*@special@*/ exprNode exprNode_create (ctype c) | |
473 | /*@defines result@*/ | |
474 | /*@post:isnull result->edata, result->guards, result->val, | |
475 | result->uses, result->sets, result->msets@*/ | |
476 | /*@*/ | |
477 | { | |
478 | exprNode e = exprNode_createPlain (c); | |
479 | e->loc = fileloc_copy (g_currentloc); | |
480 | return (e); | |
481 | } | |
482 | ||
483 | static /*@notnull@*/ /*@special@*/ exprNode exprNode_createUnknown (void) | |
484 | /*@defines result@*/ | |
485 | /*@post:isnull result->edata, result->guards, | |
486 | result->uses, result->sets, result->msets@*/ | |
487 | /*@*/ | |
488 | { | |
489 | return (exprNode_create (ctype_unknown)); | |
490 | } | |
491 | ||
492 | static /*@notnull@*/ /*@special@*/ exprNode | |
493 | exprNode_createLoc (ctype c, /*@keep@*/ fileloc loc) | |
494 | /*@defines result@*/ | |
495 | /*@post:isnull result->edata, result->guards, result->val, | |
496 | result->uses, result->sets, result->msets@*/ | |
497 | /*@*/ | |
498 | { | |
499 | exprNode e = exprNode_createPlain (c); | |
500 | e->loc = loc; | |
501 | return (e); | |
502 | } | |
503 | ||
504 | static void | |
505 | exprNode_copySets (/*@special@*/ /*@notnull@*/ exprNode ret, exprNode e) | |
506 | /*@defines ret->guards, ret->uses, ret->sets, ret->msets@*/ | |
507 | { | |
508 | if (exprNode_isDefined (e)) | |
509 | { | |
510 | ret->guards = guardSet_copy (e->guards); | |
511 | ret->uses = sRefSet_newCopy (e->uses); | |
512 | ret->sets = sRefSet_newCopy (e->sets); | |
513 | ret->msets = sRefSet_newCopy (e->msets); | |
514 | } | |
515 | else | |
516 | { | |
517 | ret->guards = guardSet_undefined; | |
518 | ret->uses = sRefSet_undefined; | |
519 | ret->sets = sRefSet_undefined; | |
520 | ret->msets = sRefSet_undefined; | |
521 | } | |
522 | } | |
523 | ||
524 | static /*@notnull@*/ /*@special@*/ exprNode | |
525 | exprNode_createPartialLocCopy (exprNode e, /*@only@*/ fileloc loc) | |
526 | /*@defines result@*/ | |
527 | /*@post:isnull result->edata, result->etext@*/ | |
528 | /*@*/ | |
529 | { | |
530 | exprNode ret = exprNode_new (); | |
531 | ||
532 | if (exprNode_isError (e)) | |
533 | { | |
534 | ret->typ = ctype_unknown; | |
535 | ret->val = multiVal_undefined; | |
536 | ret->loc = loc; | |
537 | ret->guards = guardSet_undefined; | |
538 | ret->uses = sRefSet_undefined; | |
539 | ret->sets = sRefSet_undefined; | |
540 | ret->msets = sRefSet_undefined; | |
541 | } | |
542 | else | |
543 | { | |
544 | ret->typ = e->typ; | |
545 | ret->val = multiVal_copy (e->val); | |
546 | ret->loc = loc; | |
547 | ret->guards = guardSet_copy (e->guards); | |
548 | ret->uses = sRefSet_newCopy (e->uses); | |
549 | ret->sets = sRefSet_newCopy (e->sets); | |
550 | ret->msets = sRefSet_newCopy (e->msets); | |
551 | } | |
552 | ||
553 | ret->kind = XPR_EMPTY; | |
554 | ret->sref = defref; | |
555 | ret->etext = cstring_undefined; | |
556 | ret->exitCode = XK_NEVERESCAPE; | |
557 | ret->canBreak = FALSE; | |
558 | ret->mustBreak = FALSE; | |
559 | ret->isJumpPoint = FALSE; | |
560 | ret->edata = exprData_undefined; | |
561 | ||
562 | exprNode_defineConstraints(ret); | |
563 | ||
564 | return (ret); | |
565 | } | |
566 | ||
567 | ||
568 | static /*@notnull@*/ /*@special@*/ exprNode | |
569 | exprNode_createPartialCopy (exprNode e) | |
570 | /*@defines result@*/ | |
571 | /*@post:isnull result->edata, result->etext@*/ | |
572 | /*@*/ | |
573 | { | |
574 | return (exprNode_createPartialLocCopy (e, fileloc_copy (exprNode_loc (e)))); | |
575 | } | |
576 | ||
577 | static /*@notnull@*/ /*@special@*/ exprNode | |
578 | exprNode_createPartialNVCopy (exprNode e) | |
579 | /*@defines result@*/ | |
580 | /*@post:isnull result->edata, result->etext, result->val @*/ | |
581 | /*@*/ | |
582 | { | |
583 | exprNode ret = exprNode_new (); | |
584 | ||
585 | if (exprNode_isError (e)) | |
586 | { | |
587 | ret->typ = ctype_unknown; | |
588 | ret->loc = fileloc_undefined; | |
589 | ret->guards = guardSet_undefined; | |
590 | ret->uses = sRefSet_undefined; | |
591 | ret->sets = sRefSet_undefined; | |
592 | ret->msets = sRefSet_undefined; | |
593 | } | |
594 | else | |
595 | { | |
596 | ret->typ = e->typ; | |
597 | ret->loc = fileloc_copy (e->loc); | |
598 | ret->guards = guardSet_copy (e->guards); | |
599 | ret->uses = sRefSet_newCopy (e->uses); | |
600 | ret->sets = sRefSet_newCopy (e->sets); | |
601 | ret->msets = sRefSet_newCopy (e->msets); | |
602 | } | |
603 | ||
604 | ret->val = multiVal_undefined; | |
605 | ret->kind = XPR_EMPTY; | |
606 | ret->sref = defref; | |
607 | ret->etext = cstring_undefined; | |
608 | ret->exitCode = XK_NEVERESCAPE; | |
609 | ret->canBreak = FALSE; | |
610 | ret->mustBreak = FALSE; | |
611 | ret->isJumpPoint = FALSE; | |
612 | ret->edata = exprData_undefined; | |
613 | ||
614 | exprNode_defineConstraints(ret); | |
615 | ||
616 | return (ret); | |
617 | } | |
618 | ||
619 | static /*@notnull@*/ /*@special@*/ exprNode | |
620 | exprNode_createSemiCopy (exprNode e) | |
621 | /*@defines result@*/ | |
622 | /*@post:isnull result->edata, result->etext, result->sets, | |
623 | result->msets, result->uses, result->guards@*/ | |
624 | /*@*/ | |
625 | { | |
626 | if (exprNode_isError (e)) | |
627 | { | |
628 | return exprNode_createPlain (ctype_unknown); | |
629 | } | |
630 | else | |
631 | { | |
632 | exprNode ret = exprNode_new (); | |
633 | ||
634 | ret->typ = e->typ; | |
635 | ret->val = multiVal_copy (e->val); | |
636 | ret->loc = fileloc_copy (e->loc); | |
637 | ret->guards = guardSet_undefined; | |
638 | ret->uses = sRefSet_undefined; | |
639 | ret->sets = sRefSet_undefined; | |
640 | ret->msets = sRefSet_undefined; | |
641 | ||
642 | ret->kind = XPR_EMPTY; | |
643 | ret->sref = defref; | |
644 | ret->etext = cstring_undefined; | |
645 | ret->exitCode = XK_NEVERESCAPE; | |
646 | ret->canBreak = FALSE; | |
647 | ret->mustBreak = FALSE; | |
648 | ret->isJumpPoint = FALSE; | |
649 | ret->edata = exprData_undefined; | |
650 | ||
651 | exprNode_defineConstraints(ret); | |
652 | ||
653 | return (ret); | |
654 | } | |
655 | } | |
656 | ||
657 | bool | |
658 | exprNode_isNullValue (exprNode e) | |
659 | { | |
660 | if (exprNode_isDefined (e)) | |
661 | { | |
662 | multiVal m = exprNode_getValue (e); | |
663 | ||
664 | if (multiVal_isInt (m)) | |
665 | { | |
666 | return (multiVal_forceInt (m) == 0); | |
667 | } | |
668 | } | |
669 | ||
670 | return FALSE; | |
671 | } | |
672 | ||
673 | static bool | |
674 | exprNode_isUnknownConstant (/*@notnull@*/ exprNode e) | |
675 | { | |
676 | while (e->kind == XPR_PARENS) | |
677 | { | |
678 | e = exprData_getUopNode (e->edata); | |
679 | llassert (exprNode_isDefined (e)); | |
680 | } | |
681 | ||
682 | if (e->kind == XPR_CONST) | |
683 | { | |
684 | multiVal m = exprNode_getValue (e); | |
685 | ||
686 | if (multiVal_isUnknown (m)) | |
687 | { | |
688 | return TRUE; | |
689 | } | |
690 | } | |
691 | ||
692 | return FALSE; | |
693 | } | |
694 | ||
695 | /*@only@*/ exprNode | |
696 | exprNode_numLiteral (ctype c, /*@temp@*/ cstring t, | |
697 | /*@only@*/ fileloc loc, long val) | |
698 | { | |
699 | exprNode e = exprNode_createLoc (c, loc); | |
700 | ||
701 | e->kind = XPR_NUMLIT; | |
702 | ||
703 | llassert (multiVal_isUndefined (e->val)); | |
704 | e->val = multiVal_makeInt (val); | |
705 | e->edata = exprData_makeLiteral (cstring_copy (t)); | |
706 | ||
707 | if (val == 0) | |
708 | { | |
709 | e->sref = sRef_makeUnknown (); | |
710 | sRef_setDefNull (e->sref, e->loc); | |
711 | } | |
712 | ||
713 | DPRINTF (("Num lit: %s / %s", exprNode_unparse (e), ctype_unparse (exprNode_getType (e)))); | |
714 | return (e); | |
715 | } | |
716 | ||
717 | /*@only@*/ exprNode | |
718 | exprNode_charLiteral (char c, cstring text, /*@only@*/ fileloc loc) | |
719 | { | |
720 | exprNode e = exprNode_createLoc (ctype_char, loc); | |
721 | ||
722 | if (context_getFlag (FLG_CHARINTLITERAL)) | |
723 | { | |
724 | e->typ = ctype_makeConj (ctype_char, ctype_int); | |
725 | } | |
726 | ||
727 | e->kind = XPR_NUMLIT; | |
728 | e->val = multiVal_makeChar (c); | |
729 | ||
730 | e->edata = exprData_makeLiteral (cstring_copy (text)); | |
731 | return (e); | |
732 | } | |
733 | ||
734 | /*@only@*/ exprNode | |
735 | exprNode_floatLiteral (double d, ctype ct, cstring text, /*@only@*/ fileloc loc) | |
736 | { | |
737 | exprNode e = exprNode_createLoc (ct, loc); | |
738 | ||
739 | e->kind = XPR_NUMLIT; | |
740 | e->val = multiVal_makeDouble (d); | |
741 | e->edata = exprData_makeLiteral (cstring_copy (text)); | |
742 | return (e); | |
743 | } | |
744 | ||
745 | multiVal exprNode_getValue (exprNode e) | |
746 | { | |
747 | while (exprNode_isInParens (e)) { | |
748 | if (e->edata != NULL) { | |
749 | e = exprData_getUopNode (e->edata); | |
750 | } else { | |
751 | break; | |
752 | } | |
753 | } | |
754 | ||
755 | if (exprNode_isDefined (e)) { | |
756 | return e->val; | |
757 | } else { | |
758 | return multiVal_undefined; | |
759 | } | |
760 | } | |
761 | ||
762 | /*@only@*/ exprNode | |
763 | exprNode_combineLiterals (exprNode e, exprNode rest) | |
764 | { | |
765 | cstring ns; | |
766 | ||
767 | /* Both must be string literals. */ | |
768 | ||
769 | if (exprNode_isUndefined (rest) || exprNode_isUndefined (e)) | |
770 | { | |
771 | exprNode_free (rest); | |
772 | return e; | |
773 | } | |
774 | ||
775 | if (!exprNode_isStringLiteral (e)) | |
776 | { | |
777 | voptgenerror | |
778 | (FLG_SYNTAX, | |
779 | message ("Constant concatentation is ungrammatical: %s %s", exprNode_unparse (e), | |
780 | exprNode_unparse (rest)), | |
781 | e->loc); | |
782 | exprNode_free (rest); | |
783 | return e; | |
784 | } | |
785 | ||
786 | if (!exprNode_isStringLiteral (rest)) | |
787 | { | |
788 | voptgenerror | |
789 | (FLG_SYNTAX, | |
790 | message ("Constant concatentation is ungrammatical: %s %s", exprNode_unparse (e), exprNode_unparse (rest)), | |
791 | rest->loc); | |
792 | ||
793 | exprNode_free (rest); | |
794 | return e; | |
795 | } | |
796 | ||
797 | ns = cstring_concat (multiVal_forceString (exprNode_getValue (e)), | |
798 | multiVal_forceString (exprNode_getValue (rest))); | |
799 | ||
800 | multiVal_free (e->val); | |
801 | exprData_free (e->edata, e->kind); | |
802 | e->edata = exprData_makeLiteral (cstring_copy (ns)); | |
803 | e->val = multiVal_makeString (ns); | |
804 | exprNode_free (rest); | |
805 | return e; | |
806 | } | |
807 | ||
808 | /*@only@*/ exprNode | |
809 | exprNode_rawStringLiteral (/*@only@*/ cstring t, /*@only@*/ fileloc loc) | |
810 | { | |
811 | exprNode e = exprNode_createLoc (ctype_string, loc); | |
812 | int len = cstring_length (t); | |
813 | ||
814 | if (context_getFlag (FLG_STRINGLITERALLEN)) | |
815 | { | |
816 | if (len > context_getValue (FLG_STRINGLITERALLEN)) | |
817 | { | |
818 | voptgenerror (FLG_STRINGLITERALLEN, | |
819 | message | |
820 | ("String literal length (%d) exceeds maximum " | |
821 | "length (%d): \"%s\"", | |
822 | len, | |
823 | context_getValue (FLG_STRINGLITERALLEN), | |
824 | t), | |
825 | e->loc); | |
826 | } | |
827 | } | |
828 | ||
829 | e->kind = XPR_STRINGLITERAL; | |
830 | e->val = multiVal_makeString (cstring_copy (t)); | |
831 | e->edata = exprData_makeLiteral (t); | |
832 | e->sref = sRef_makeConst (ctype_string); | |
833 | ||
834 | if (context_getFlag (FLG_READONLYSTRINGS)) | |
835 | { | |
836 | sRef_setAliasKind (e->sref, AK_STATIC, fileloc_undefined); | |
837 | sRef_setExKind (e->sref, XO_OBSERVER, loc); | |
838 | } | |
839 | else | |
840 | { | |
841 | sRef_setAliasKind (e->sref, AK_ERROR, fileloc_undefined); | |
842 | } | |
843 | ||
844 | return (e); /* s released */ | |
845 | } | |
846 | ||
847 | /*@only@*/ exprNode | |
848 | exprNode_wideStringLiteral (/*@only@*/ cstring t, /*@only@*/ fileloc loc) | |
849 | { | |
850 | exprNode res = exprNode_stringLiteral (t, loc); | |
851 | res->typ = ctype_makeWideString (); | |
852 | ||
853 | return res; | |
854 | } | |
855 | ||
856 | /*@only@*/ exprNode | |
857 | exprNode_stringLiteral (/*@only@*/ cstring t, /*@only@*/ fileloc loc) | |
858 | { | |
859 | int len = cstring_length (t) - 2; | |
860 | char *ts = cstring_toCharsSafe (t); | |
861 | char *s = cstring_toCharsSafe (cstring_create (len + 1)); | |
862 | ||
863 | llassert (*ts == '\"' && *(ts + len + 1) == '\"'); | |
864 | strncpy (s, ts+1, size_fromInt (len)); | |
865 | *(s + len) = '\0'; | |
866 | cstring_free (t); | |
867 | return exprNode_rawStringLiteral (cstring_fromCharsO (s), loc); | |
868 | } | |
869 | ||
870 | exprNode exprNode_fromUIO (cstring c) | |
871 | { | |
872 | fileloc loc = context_getSaveLocation (); | |
873 | exprNode e = exprNode_createPlain (ctype_unknown); | |
874 | ||
875 | e->kind = XPR_VAR; | |
876 | ||
877 | if (fileloc_isUndefined (loc)) | |
878 | { | |
879 | loc = fileloc_copy (g_currentloc); | |
880 | } | |
881 | ||
882 | e->loc = loc; /* save loc was mangled */ | |
883 | e->sref = defref; | |
884 | ||
885 | if (usymtab_exists (c)) | |
886 | { | |
887 | uentry ue = usymtab_lookupEither (c); | |
888 | ||
889 | if (uentry_isDatatype (ue) | |
890 | && uentry_isSpecified (ue)) | |
891 | { | |
892 | llfatalerror | |
893 | (message ("%q: Specified datatype %s used in code, but not defined. " | |
894 | "(Cannot continue reasonably from this error.)", | |
895 | fileloc_unparse (e->loc), c)); | |
896 | } | |
897 | else | |
898 | { | |
899 | BADBRANCH; | |
900 | } | |
901 | } | |
902 | ||
903 | llassertprint (!usymtab_exists (c), ("Entry exists: %s", c)); | |
904 | ||
905 | /* | |
906 | ** was supercedeGlobalEntry...is this better? | |
907 | */ | |
908 | ||
909 | if (!context_inIterEnd ()) | |
910 | { | |
911 | if (context_inMacro ()) | |
912 | { | |
913 | if (context_getFlag (FLG_UNRECOG)) | |
914 | { | |
915 | voptgenerror | |
916 | (FLG_MACROUNDEF, | |
917 | message ("Unrecognized identifier in macro definition: %s", c), e->loc); | |
918 | } | |
919 | else | |
920 | { | |
921 | flagcode_recordSuppressed (FLG_UNRECOG); | |
922 | } | |
923 | } | |
924 | else | |
925 | { | |
926 | voptgenerror | |
927 | (FLG_UNRECOG, message ("Unrecognized identifier: %s", c), e->loc); | |
928 | } | |
929 | } | |
930 | ||
931 | e->edata = exprData_makeId (uentry_makeUnrecognized (c, fileloc_copy (loc))); | |
932 | ||
933 | /* No alias errors for unrecognized identifiers */ | |
934 | sRef_setAliasKind (e->sref, AK_ERROR, loc); | |
935 | ||
936 | return (e); | |
937 | } | |
938 | ||
939 | exprNode exprNode_makeConstantString (cstring c, /*@only@*/ fileloc loc) | |
940 | { | |
941 | exprNode e = exprNode_createPlain (ctype_unknown); | |
942 | e->kind = XPR_VAR; | |
943 | e->loc = loc; | |
944 | e->sref = sRef_makeConst (ctype_string); | |
945 | e->edata = exprData_makeId (uentry_makeUnrecognized (c, fileloc_copy (loc))); | |
946 | e->typ = ctype_string; | |
947 | ||
948 | /* No alias errors for unrecognized identifiers */ | |
949 | sRef_setAliasKind (e->sref, AK_STATIC, loc); | |
950 | sRef_setExKind (e->sref, XO_OBSERVER, loc); | |
951 | ||
952 | return (e); | |
953 | } | |
954 | ||
955 | exprNode exprNode_createId (/*@observer@*/ uentry c) | |
956 | { | |
957 | if (uentry_isValid (c)) | |
958 | { | |
959 | exprNode e = exprNode_new (); | |
960 | ||
961 | DPRINTF (("create id: %s", uentry_unparse (c))); | |
962 | ||
963 | e->typ = uentry_getType (c); | |
964 | ||
965 | if (uentry_isFunction (c) | |
966 | && !sRef_isLocalVar (uentry_getSref (c))) | |
967 | { | |
968 | e->sref = sRef_undefined; | |
969 | } | |
970 | else | |
971 | { | |
972 | e->sref = uentry_getSref (c); | |
973 | } | |
974 | ||
975 | if (sRef_isStateUnknown (e->sref) && uentry_isNonLocal (c)) | |
976 | { | |
977 | sRef_setDefined (e->sref, fileloc_undefined); | |
978 | } | |
979 | ||
980 | /* | |
981 | ** yoikes! leaving this out was a heinous bug...that would have been | |
982 | ** caught if i had splint working first. gag! | |
983 | */ | |
984 | ||
985 | e->etext = cstring_undefined; | |
986 | ||
987 | if (uentry_isEitherConstant (c)) | |
988 | { | |
989 | e->kind = XPR_CONST; | |
990 | e->val = multiVal_copy (uentry_getConstantValue (c)); | |
991 | } | |
992 | else | |
993 | { | |
994 | e->kind = XPR_VAR; | |
995 | e->val = multiVal_unknown (); | |
996 | } | |
997 | ||
998 | e->edata = exprData_makeId (c); | |
999 | e->loc = context_getSaveLocation (); | |
1000 | ||
1001 | if (fileloc_isUndefined (e->loc)) | |
1002 | { | |
1003 | fileloc_free (e->loc); | |
1004 | e->loc = fileloc_copy (g_currentloc); | |
1005 | } | |
1006 | ||
1007 | e->guards = guardSet_new (); | |
1008 | e->sets = sRefSet_new (); | |
1009 | e->msets = sRefSet_new (); | |
1010 | e->uses = sRefSet_new (); | |
1011 | ||
1012 | /*> missing fields, detected by splint <*/ | |
1013 | e->exitCode = XK_NEVERESCAPE; | |
1014 | e->isJumpPoint = FALSE; | |
1015 | e->canBreak = FALSE; | |
1016 | e->mustBreak = FALSE; | |
1017 | ||
1018 | exprNode_defineConstraints(e); | |
1019 | ||
1020 | return e; | |
1021 | } | |
1022 | else | |
1023 | { | |
1024 | return exprNode_createUnknown (); | |
1025 | } | |
1026 | } | |
1027 | ||
1028 | /*@notnull@*/ exprNode | |
1029 | exprNode_fromIdentifier (/*@observer@*/ uentry c) | |
1030 | { | |
1031 | exprNode ret; | |
1032 | ||
1033 | if (context_justPopped ()) /* watch out! c could be dead */ | |
1034 | { | |
1035 | uentry ce = usymtab_lookupSafe (LastIdentifier ()); | |
1036 | ||
1037 | if (uentry_isValid (ce)) | |
1038 | { | |
1039 | c = ce; | |
1040 | } | |
1041 | else | |
1042 | { | |
1043 | llbuglit ("Looks like Aunt Millie forgot to walk to dog again."); | |
1044 | } | |
1045 | } | |
1046 | ||
1047 | ret = exprNode_fromIdentifierAux (c); | |
1048 | return ret; | |
1049 | } | |
1050 | ||
1051 | ||
1052 | static void exprNode_checkStringLiteralLength (ctype t1, exprNode e2) | |
1053 | { | |
1054 | multiVal mval = exprNode_getValue (e2); | |
1055 | cstring slit; | |
1056 | int len; | |
1057 | ||
1058 | if (ctype_isFixedArray (t1)) | |
1059 | { | |
1060 | ||
1061 | int nelements = long_toInt (ctype_getArraySize (t1)); | |
1062 | ||
1063 | llassert (multiVal_isString (mval)); | |
1064 | slit = multiVal_forceString (mval); | |
1065 | ||
1066 | len = cstring_lengthExpandEscapes (slit); | |
1067 | ||
1068 | ||
1069 | if (len == nelements) | |
1070 | { | |
1071 | mstring temp; | |
1072 | ||
1073 | temp = cstring_expandEscapes(slit); | |
1074 | ||
1075 | if (temp[len-1] == '\0') | |
1076 | { | |
1077 | voptgenerror | |
1078 | (FLG_STRINGLITNOROOMFINALNULL, | |
1079 | message ("String literal with %d character%& " | |
1080 | "is assigned to %s (no room for final null terminator): %s", | |
1081 | len + 1, | |
1082 | ctype_unparse (t1), | |
1083 | exprNode_unparse (e2)), | |
1084 | e2->loc); | |
1085 | } | |
1086 | else | |
1087 | { | |
1088 | ||
1089 | ||
1090 | voptgenerror | |
1091 | (FLG_STRINGLITNOROOM, | |
1092 | message ("String literal with %d character%& " | |
1093 | "is assigned to %s (no room for null terminator): %s", | |
1094 | len + 1, | |
1095 | ctype_unparse (t1), | |
1096 | exprNode_unparse (e2)), | |
1097 | e2->loc); | |
1098 | } | |
1099 | } | |
1100 | else if (len > nelements) | |
1101 | { | |
1102 | voptgenerror | |
1103 | (FLG_STRINGLITTOOLONG, | |
1104 | message ("String literal with %d character%& (counting null terminator) " | |
1105 | "is assigned to %s (insufficient storage available): %s", | |
1106 | len + 1, | |
1107 | ctype_unparse (t1), | |
1108 | exprNode_unparse (e2)), | |
1109 | e2->loc); | |
1110 | } | |
1111 | else if (len < nelements - 1) | |
1112 | { | |
1113 | voptgenerror | |
1114 | (FLG_STRINGLITSMALLER, | |
1115 | message ("String literal with %d character%& is assigned to %s (possible waste of storage): %s", | |
1116 | len + 1, | |
1117 | ctype_unparse (t1), | |
1118 | exprNode_unparse (e2)), | |
1119 | e2->loc); | |
1120 | } | |
1121 | else | |
1122 | { | |
1123 | ; /* okay */ | |
1124 | } | |
1125 | } | |
1126 | } | |
1127 | ||
1128 | static /*@only@*/ /*@notnull@*/ exprNode | |
1129 | exprNode_fromIdentifierAux (/*@observer@*/ uentry c) | |
1130 | { | |
1131 | exprNode e = exprNode_createId (c); | |
1132 | sRef sr = e->sref; | |
1133 | ||
1134 | uentry_setUsed (c, e->loc); | |
1135 | ||
1136 | if (uentry_isVar (c) && sRef_isFileOrGlobalScope (sr)) | |
1137 | { | |
1138 | checkGlobUse (c, FALSE, e); | |
1139 | } | |
1140 | ||
1141 | return (e); | |
1142 | } | |
1143 | ||
1144 | static bool | |
1145 | exprNode_isZero (exprNode e) | |
1146 | { | |
1147 | if (exprNode_isDefined (e)) | |
1148 | { | |
1149 | multiVal m = exprNode_getValue (e); | |
1150 | ||
1151 | if (multiVal_isInt (m)) | |
1152 | { | |
1153 | return (multiVal_forceInt (m) == 0); | |
1154 | } | |
1155 | } | |
1156 | ||
1157 | return FALSE; | |
1158 | } | |
1159 | ||
1160 | static bool | |
1161 | exprNode_isNonNegative (exprNode e) | |
1162 | { | |
1163 | if (exprNode_isDefined (e)) | |
1164 | { | |
1165 | multiVal m = exprNode_getValue (e); | |
1166 | ||
1167 | if (multiVal_isInt (m)) | |
1168 | { | |
1169 | return (multiVal_forceInt (m) >= 0); | |
1170 | } | |
1171 | ||
1172 | /* | |
1173 | ** This is not always true if programmer defines enum | |
1174 | ** values, but then the constant should be known. | |
1175 | */ | |
1176 | ||
1177 | if (ctype_isEnum (ctype_realType (e->typ))) | |
1178 | { | |
1179 | return TRUE; | |
1180 | } | |
1181 | } | |
1182 | ||
1183 | return FALSE; | |
1184 | } | |
1185 | ||
1186 | /* | |
1187 | ** a[x] - uses a but NOT a[] | |
1188 | ** result sref = a[] (set/use in assignment) | |
1189 | ** | |
1190 | ** The syntax x[a] is also legal in C, and has the same | |
1191 | ** semantics. If ind is an array, and arr is an int, flip | |
1192 | ** the arguments. | |
1193 | */ | |
1194 | ||
1195 | /*@only@*/ exprNode | |
1196 | exprNode_arrayFetch (/*@only@*/ exprNode e1, /*@only@*/ exprNode e2) | |
1197 | { | |
1198 | /* | |
1199 | ** error in arr, error propagates (no new messages) | |
1200 | ** error in ind, assume valid and continue | |
1201 | */ | |
1202 | ||
1203 | DPRINTF (("Array fetch: %s / %s", | |
1204 | exprNode_unparse (e1), exprNode_unparse (e2))); | |
1205 | ||
1206 | if (exprNode_isError (e1)) | |
1207 | { | |
1208 | exprNode_free (e2); | |
1209 | return (exprNode_makeError ()); | |
1210 | } | |
1211 | else | |
1212 | { | |
1213 | exprNode arr; | |
1214 | exprNode ind; | |
1215 | ctype carr = exprNode_getType (e1); | |
1216 | ctype crarr = ctype_realType (carr); | |
1217 | ||
1218 | /* | |
1219 | ** this sets up funny aliasing, that leads to spurious | |
1220 | ** splint errors. Hence, the i2 comments. | |
1221 | */ | |
1222 | ||
1223 | /* evans 2001-09-09 added ctype_isKnown so there is no swap when e1 type is unknown */ | |
1224 | if (ctype_isKnown (crarr) | |
1225 | && !ctype_isRealArray (crarr) | |
1226 | && ctype_isRealNumeric (crarr) | |
1227 | && !exprNode_isError (e2) | |
1228 | && ctype_isRealAP (exprNode_getType (e2))) /* fetch like 3[a] */ | |
1229 | { | |
1230 | arr = e2; | |
1231 | ind = e1; | |
1232 | ||
1233 | carr = exprNode_getType (arr); | |
1234 | crarr = ctype_realType (carr); | |
1235 | } | |
1236 | else | |
1237 | { | |
1238 | arr = e1; | |
1239 | ind = e2; | |
1240 | } | |
1241 | ||
1242 | DPRINTF (("arr: %s", exprNode_unparse (arr))); | |
1243 | ||
1244 | if (sRef_possiblyNull (arr->sref)) | |
1245 | { | |
1246 | if (!usymtab_isGuarded (arr->sref)) | |
1247 | { | |
1248 | if (optgenerror (FLG_NULLDEREF, | |
1249 | message ("Index of %s pointer %q: %s", | |
1250 | sRef_nullMessage (arr->sref), | |
1251 | sRef_unparse (arr->sref), | |
1252 | exprNode_unparse (arr)), | |
1253 | arr->loc)) | |
1254 | { | |
1255 | DPRINTF (("ref: %s", sRef_unparseFull (arr->sref))); | |
1256 | sRef_showNullInfo (arr->sref); | |
1257 | ||
1258 | /* suppress future messages */ | |
1259 | sRef_setNullError (arr->sref); | |
1260 | } | |
1261 | } | |
1262 | } | |
1263 | ||
1264 | if (exprNode_isError (ind)) | |
1265 | { | |
1266 | if ((ctype_isArrayPtr (crarr) | |
1267 | && !ctype_isFunction (crarr)) | |
1268 | || ctype_isUnknown (carr)) | |
1269 | { | |
1270 | exprNode ret = exprNode_createPartialCopy (arr); | |
1271 | ||
1272 | if (ctype_isKnown (carr)) | |
1273 | { | |
1274 | ret->typ = ctype_baseArrayPtr (crarr); | |
1275 | } | |
1276 | else | |
1277 | { | |
1278 | ret->typ = ctype_unknown; | |
1279 | } | |
1280 | ||
1281 | ret->sref = sRef_makeArrayFetch (arr->sref); | |
1282 | ||
1283 | ret->kind = XPR_FETCH; | |
1284 | ||
1285 | /* | |
1286 | ** Because of funny aliasing (when arr and ind are | |
1287 | ** flipped) spurious errors would be reported here. | |
1288 | */ | |
1289 | ||
1290 | /*@i2@*/ ret->edata = exprData_makePair (arr, ind); | |
1291 | checkSafeUse (ret, arr->sref); | |
1292 | return (ret); | |
1293 | } | |
1294 | else | |
1295 | { | |
1296 | voptgenerror (FLG_TYPE, | |
1297 | message ("Array fetch from non-array (%t): %s[%s]", carr, | |
1298 | exprNode_unparse (e1), exprNode_unparse (e2)), | |
1299 | arr->loc); | |
1300 | exprNode_free (arr); | |
1301 | return (exprNode_makeError ()); | |
1302 | } | |
1303 | } | |
1304 | else | |
1305 | { | |
1306 | if (!ctype_isForceRealInt (&(ind->typ))) | |
1307 | { | |
1308 | ctype rt = ctype_realType (ind->typ); | |
1309 | ||
1310 | if (ctype_isChar (rt)) | |
1311 | { | |
1312 | vnoptgenerror | |
1313 | (FLG_CHARINDEX, | |
1314 | message ("Array fetch using non-integer, %t: %s[%s]", | |
1315 | ind->typ, | |
1316 | exprNode_unparse (e1), exprNode_unparse (e2)), | |
1317 | arr->loc); | |
1318 | } | |
1319 | else if (ctype_isEnum (rt)) | |
1320 | { | |
1321 | vnoptgenerror | |
1322 | (FLG_ENUMINDEX, | |
1323 | message ("Array fetch using non-integer, %t: %s[%s]", | |
1324 | ind->typ, | |
1325 | exprNode_unparse (e1), exprNode_unparse (e2)), | |
1326 | arr->loc); | |
1327 | } | |
1328 | else | |
1329 | { | |
1330 | voptgenerror | |
1331 | (FLG_TYPE, | |
1332 | message ("Array fetch using non-integer, %t: %s[%s]", | |
1333 | ind->typ, | |
1334 | exprNode_unparse (e1), exprNode_unparse (e2)), | |
1335 | arr->loc); | |
1336 | } | |
1337 | ||
1338 | multiVal_free (ind->val); | |
1339 | ind->val = multiVal_unknown (); | |
1340 | } | |
1341 | ||
1342 | if (ctype_isArrayPtr (crarr) && !ctype_isFunction (crarr)) | |
1343 | { | |
1344 | exprNode ret = exprNode_createSemiCopy (arr); | |
1345 | multiVal m = exprNode_getValue (ind); | |
1346 | ||
1347 | ret->typ = ctype_baseArrayPtr (crarr); | |
1348 | ret->kind = XPR_FETCH; | |
1349 | ||
1350 | if (multiVal_isInt (m)) | |
1351 | { | |
1352 | int i = (int) multiVal_forceInt (m); | |
1353 | ||
1354 | if (sRef_isValid (arr->sref)) { | |
1355 | ret->sref = sRef_makeArrayFetchKnown (arr->sref, i); | |
1356 | } else { | |
1357 | ret->sref = sRef_undefined; | |
1358 | } | |
1359 | } | |
1360 | else | |
1361 | { | |
1362 | ret->sref = sRef_makeArrayFetch (arr->sref); | |
1363 | } | |
1364 | ||
1365 | ret->sets = sRefSet_realNewUnion (arr->sets, ind->sets); | |
1366 | ret->msets = sRefSet_realNewUnion (arr->msets, ind->msets); | |
1367 | ret->uses = sRefSet_realNewUnion (arr->uses, ind->uses); | |
1368 | ||
1369 | /* (see comment on spurious errors above) */ | |
1370 | /*@i2@*/ ret->edata = exprData_makePair (arr, ind); | |
1371 | ||
1372 | exprNode_checkUse (ret, ind->sref, ind->loc); | |
1373 | exprNode_checkUse (ret, arr->sref, arr->loc); | |
1374 | ||
1375 | return (ret); | |
1376 | } | |
1377 | else | |
1378 | { | |
1379 | if (ctype_isUnknown (carr)) | |
1380 | { | |
1381 | exprNode ret = exprNode_createPartialCopy (arr); | |
1382 | ||
1383 | ret->kind = XPR_FETCH; | |
1384 | ret->typ = ctype_unknown; | |
1385 | ret->sets = sRefSet_union (ret->sets, ind->sets); | |
1386 | ret->msets = sRefSet_union (ret->msets, ind->msets); | |
1387 | ret->uses = sRefSet_union (ret->uses, ind->uses); | |
1388 | ||
1389 | /* (see comment on spurious errors above) */ | |
1390 | /*@i2@*/ ret->edata = exprData_makePair (arr, ind); | |
1391 | ||
1392 | exprNode_checkUse (ret, ind->sref, ind->loc); | |
1393 | exprNode_checkUse (ret, arr->sref, arr->loc); | |
1394 | return (ret); | |
1395 | } | |
1396 | else | |
1397 | { | |
1398 | voptgenerror | |
1399 | (FLG_TYPE, | |
1400 | message ("Array fetch from non-array (%t): %s[%s]", carr, | |
1401 | exprNode_unparse (e1), exprNode_unparse (e2)), | |
1402 | arr->loc); | |
1403 | ||
1404 | exprNode_free (arr); | |
1405 | exprNode_free (ind); | |
1406 | ||
1407 | return (exprNode_makeError ()); | |
1408 | } | |
1409 | } | |
1410 | } | |
1411 | } | |
1412 | BADEXIT; | |
1413 | } | |
1414 | ||
1415 | ||
1416 | static int | |
1417 | checkArgs (uentry fcn, /*@dependent@*/ exprNode f, ctype t, | |
1418 | exprNodeList args, exprNode ret) | |
1419 | { | |
1420 | return (checkArgsReal (fcn, f, ctype_argsFunction (t), args, FALSE, ret)); | |
1421 | } | |
1422 | ||
1423 | /* | |
1424 | ** checkPrintfArgs --- checks arguments for printf-like functions | |
1425 | ** Arguments before ... have already been checked. | |
1426 | ** The argument before the ... is a char *. | |
1427 | ** argno is the format string argument. | |
1428 | */ | |
1429 | ||
1430 | static void | |
1431 | checkPrintfArgs (/*@notnull@*/ /*@dependent@*/ exprNode f, uentry fcn, | |
1432 | exprNodeList args, exprNode ret, int argno) | |
1433 | { | |
1434 | /* | |
1435 | ** the last argument before the elips is the format string | |
1436 | */ | |
1437 | ||
1438 | int i = argno; | |
1439 | fileloc formatloc; | |
1440 | int nargs = exprNodeList_size (args); | |
1441 | uentryList params = uentry_getParams (fcn); | |
1442 | exprNode a; | |
1443 | ||
1444 | /* | |
1445 | ** These should be ensured by checkSpecialFunction | |
1446 | */ | |
1447 | ||
1448 | llassert (uentryList_size (params) == argno + 1); | |
1449 | llassert (uentry_isElipsisMarker (uentryList_getN (params, argno))); | |
1450 | ||
1451 | a = exprNodeList_getN (args, argno - 1); | |
1452 | formatloc = fileloc_copy (exprNode_loc (a)); | |
1453 | ||
1454 | if (exprNode_isDefined (a) && exprNode_isStringLiteral (a) | |
1455 | && exprNode_knownStringValue (a)) | |
1456 | { | |
1457 | char *format = cstring_toCharsSafe (multiVal_forceString (exprNode_getValue (a))); | |
1458 | char *code = format; | |
1459 | char *ocode = code; | |
1460 | ||
1461 | nargs = exprNodeList_size (args); | |
1462 | ||
1463 | while ((code = strchr (code, '%')) != NULL) | |
1464 | { | |
1465 | char *origcode = code; | |
1466 | cstring codetext = cstring_newEmpty (); | |
1467 | char key = *(++code); | |
1468 | ctype modtype = ctype_int; | |
1469 | bool modified = FALSE; | |
1470 | ||
1471 | fileloc_addColumn (formatloc, code - ocode); | |
1472 | ||
1473 | codetext = cstring_appendChar (codetext, key); | |
1474 | ||
1475 | /* ignore flags */ | |
1476 | while (isFlagKey (key)) | |
1477 | { | |
1478 | key = *(++code); | |
1479 | codetext = cstring_appendChar (codetext, key); | |
1480 | fileloc_incColumn (formatloc); | |
1481 | } | |
1482 | ||
1483 | if (key == 'm') /* skipped in syslog */ | |
1484 | { | |
1485 | continue; | |
1486 | } | |
1487 | ||
1488 | /* ignore field width */ | |
1489 | while (isdigit ((int) key) != 0) | |
1490 | { | |
1491 | key = *(++code); | |
1492 | codetext = cstring_appendChar (codetext, key); | |
1493 | fileloc_incColumn (formatloc); | |
1494 | } | |
1495 | ||
1496 | /* ignore precision */ | |
1497 | if (key == '.') | |
1498 | { | |
1499 | key = *(++code); | |
1500 | codetext = cstring_appendChar (codetext, key); | |
1501 | fileloc_incColumn (formatloc); | |
1502 | ||
1503 | /* | |
1504 | ** In printf, '*' means: read the next arg as an int for the | |
1505 | ** field width. This seems to be missing from my copy of the | |
1506 | ** standard x3.159-1989. Setion 4.9.6.1 refers to * (described | |
1507 | ** later) but never does. | |
1508 | */ | |
1509 | ||
1510 | if (key == '*') | |
1511 | { | |
1512 | ; /* don't do anything --- handle later */ | |
1513 | } | |
1514 | else | |
1515 | { | |
1516 | while (isdigit ((int) key) != 0) | |
1517 | { | |
1518 | key = *(++code); | |
1519 | codetext = cstring_appendChar (codetext, key); | |
1520 | fileloc_incColumn (formatloc); | |
1521 | } | |
1522 | } | |
1523 | } | |
1524 | ||
1525 | if (key == 'h') | |
1526 | { | |
1527 | modtype = ctype_sint; /* short */ | |
1528 | key = *(++code); | |
1529 | codetext = cstring_appendChar (codetext, key); | |
1530 | fileloc_incColumn (formatloc); | |
1531 | } | |
1532 | else if (key == 'l' || key == 'L') | |
1533 | { | |
1534 | modtype = ctype_lint; /* long */ | |
1535 | key = *(++code); | |
1536 | codetext = cstring_appendChar (codetext, key); | |
1537 | fileloc_incColumn (formatloc); | |
1538 | ||
1539 | if (key == 'l' || key == 'L') { | |
1540 | modtype = ctype_llint; /* long long */ | |
1541 | key = *(++code); | |
1542 | codetext = cstring_appendChar (codetext, key); | |
1543 | fileloc_incColumn (formatloc); | |
1544 | } | |
1545 | } | |
1546 | else | |
1547 | { | |
1548 | ; /* no modifier */ | |
1549 | } | |
1550 | ||
1551 | /* now, key = type of conversion to apply */ | |
1552 | ++code; | |
1553 | fileloc_incColumn (formatloc); | |
1554 | ||
1555 | if (key != '%') | |
1556 | { | |
1557 | if (i >= nargs) | |
1558 | { | |
1559 | if (optgenerror | |
1560 | (FLG_TYPE, | |
1561 | message ("No argument corresponding to %q format " | |
1562 | "code %d (%%%s): \"%s\"", | |
1563 | uentry_getName (fcn), | |
1564 | i, codetext, | |
1565 | cstring_fromChars (format)), | |
1566 | f->loc)) | |
1567 | { | |
1568 | if (fileloc_isDefined (formatloc) | |
1569 | && context_getFlag (FLG_SHOWCOL)) | |
1570 | { | |
1571 | llgenindentmsg (cstring_makeLiteral ("Corresponding format code"), | |
1572 | formatloc); | |
1573 | } | |
1574 | } | |
1575 | i++; | |
1576 | } | |
1577 | else | |
1578 | { | |
1579 | a = exprNodeList_getN (args, i); | |
1580 | i++; | |
1581 | ||
1582 | if (!exprNode_isError (a)) | |
1583 | { | |
1584 | ctype expecttype; | |
1585 | ||
1586 | switch (key) | |
1587 | { | |
1588 | case '*': /* int argument for fieldwidth */ | |
1589 | expecttype = ctype_int; | |
1590 | *(--code) = '%'; /* convert it for next code */ | |
1591 | fileloc_subColumn (formatloc, 1); | |
1592 | /*@switchbreak@*/ break; | |
1593 | case 'u': | |
1594 | case 'o': | |
1595 | expecttype = ctype_combine (ctype_uint, modtype); | |
1596 | /*@switchbreak@*/ break; | |
1597 | ||
1598 | case 'i': /* int argument */ | |
1599 | case 'd': | |
1600 | expecttype = ctype_combine (ctype_int, modtype); | |
1601 | /*@switchbreak@*/ break; | |
1602 | ||
1603 | case 'x': /* unsigned int */ | |
1604 | case 'X': | |
1605 | expecttype = ctype_combine (ctype_uint, modtype); | |
1606 | ||
1607 | /*@switchbreak@*/ break; | |
1608 | ||
1609 | case 'e': | |
1610 | case 'E': | |
1611 | case 'g': | |
1612 | case 'G': | |
1613 | case 'f': /* double */ | |
1614 | expecttype = ctype_combine (ctype_double, modtype); | |
1615 | /*@switchbreak@*/ break; | |
1616 | ||
1617 | case 'c': /* int converted to char (check its a char?) */ | |
1618 | expecttype = ctype_makeConj (ctype_int, | |
1619 | ctype_makeConj (ctype_char, | |
1620 | ctype_uchar)); | |
1621 | /*@i231@*/ | |
1622 | /* evans 2001-10-05 - changed to reflect correct ISO spec: | |
1623 | int converted to char */ | |
1624 | ||
1625 | /* expecttype = ctype_makeConj (ctype_char, ctype_uchar); */ | |
1626 | /*@switchbreak@*/ break; | |
1627 | ||
1628 | case 's': /* string */ | |
1629 | expecttype = ctype_string; | |
1630 | /*@switchbreak@*/ break; | |
1631 | case '[': | |
1632 | /* skip to ']' */ | |
1633 | while (((key = *(++code)) != ']') | |
1634 | && (key != '\0')) | |
1635 | { | |
1636 | codetext = cstring_appendChar (codetext, key); | |
1637 | fileloc_incColumn (formatloc); | |
1638 | } | |
1639 | ||
1640 | if (key == '\0') | |
1641 | { | |
1642 | llfatalerrorLoc | |
1643 | (message ("Bad character set format: %s", | |
1644 | cstring_fromChars (origcode))); | |
1645 | } | |
1646 | ||
1647 | expecttype = ctype_string; | |
1648 | /*@switchbreak@*/ break; | |
1649 | ||
1650 | case 'p': /* pointer */ | |
1651 | expecttype = ctype_makePointer (ctype_void); | |
1652 | uentry_setDefState (regArg, SS_RELDEF); /* need not be defined */ | |
1653 | sRef_setPosNull (uentry_getSref (regArg), fileloc_undefined); /* could be null */ | |
1654 | /*@switchbreak@*/ break; | |
1655 | ||
1656 | case 'n': /* pointer to int, modified by call! */ | |
1657 | expecttype = ctype_combine (ctype_makePointer (ctype_int), modtype); | |
1658 | modified = TRUE; | |
1659 | uentry_setDefState (regArg, SS_ALLOCATED); /* corresponds to out */ | |
1660 | /*@switchbreak@*/ break; | |
1661 | ||
1662 | case 'm': /* in a syslog, it doesn't consume an argument */ | |
1663 | /* should check we're really doing syslog */ | |
1664 | ||
1665 | /*@switchbreak@*/ break; | |
1666 | ||
1667 | ||
1668 | default: | |
1669 | expecttype = ctype_unknown; | |
1670 | ||
1671 | voptgenerror | |
1672 | (FLG_FORMATCODE, | |
1673 | message ("Unrecognized format code: %s", | |
1674 | cstring_fromChars (origcode)), | |
1675 | fileloc_isDefined (formatloc) | |
1676 | ? formatloc : g_currentloc); | |
1677 | ||
1678 | /*@switchbreak@*/ break; | |
1679 | } | |
1680 | ||
1681 | if (!(exprNode_matchArgType (expecttype, a))) | |
1682 | { | |
1683 | if (ctype_isVoidPointer (expecttype) | |
1684 | && ctype_isRealAbstract (a->typ) | |
1685 | && (context_getFlag (FLG_ABSTVOIDP))) | |
1686 | { | |
1687 | ; | |
1688 | } | |
1689 | else | |
1690 | { | |
1691 | if (llgenformattypeerror | |
1692 | (expecttype, exprNode_undefined, | |
1693 | a->typ, a, | |
1694 | message ("Format argument %d to %q (%%%s) expects " | |
1695 | "%t gets %t: %s", | |
1696 | i - argno, | |
1697 | uentry_getName (fcn), | |
1698 | codetext, | |
1699 | expecttype, | |
1700 | a->typ, exprNode_unparse (a)), | |
1701 | a->loc)) | |
1702 | { | |
1703 | if (fileloc_isDefined (formatloc) | |
1704 | && context_getFlag (FLG_SHOWCOL)) | |
1705 | { | |
1706 | llgenindentmsg | |
1707 | (cstring_makeLiteral | |
1708 | ("Corresponding format code"), | |
1709 | formatloc); | |
1710 | } | |
1711 | } | |
1712 | } | |
1713 | } | |
1714 | ||
1715 | uentry_setType (regArg, expecttype); | |
1716 | checkOneArg (regArg, a, f, FALSE, i+1, nargs); | |
1717 | ||
1718 | if (ctype_equal (expecttype, ctype_string)) | |
1719 | { | |
1720 | exprNode_checkUse (a, sRef_makePointer (a->sref), a->loc); | |
1721 | } | |
1722 | ||
1723 | uentry_setType (regArg, ctype_unknown); | |
1724 | uentry_fixupSref (regArg); | |
1725 | ||
1726 | if (modified) | |
1727 | { | |
1728 | exprNode_checkCallModifyVal (a->sref, args, f, ret); | |
1729 | } | |
1730 | } | |
1731 | else | |
1732 | { | |
1733 | ; | |
1734 | } | |
1735 | } | |
1736 | } | |
1737 | ||
1738 | ocode = code; | |
1739 | cstring_free (codetext); | |
1740 | } | |
1741 | ||
1742 | if (i < nargs) | |
1743 | { | |
1744 | voptgenerror (FLG_TYPE, | |
1745 | message ("Format string for %q has %d arg%&, given %d", | |
1746 | uentry_getName (fcn), i - argno, nargs - argno), | |
1747 | f->loc); | |
1748 | } | |
1749 | } | |
1750 | else | |
1751 | { | |
1752 | /* no checking possible for compile-time unknown format strings */ | |
1753 | if (exprNode_isDefined (a)) | |
1754 | { | |
1755 | voptgenerror | |
1756 | (FLG_FORMATCONST, | |
1757 | message ("Format string parameter to %s is not a compile-time constant: %s", | |
1758 | exprNode_unparse (f), | |
1759 | exprNode_unparse (a)), | |
1760 | f->loc); | |
1761 | } | |
1762 | } | |
1763 | ||
1764 | fileloc_free (formatloc); | |
1765 | } | |
1766 | ||
1767 | static void | |
1768 | checkScanfArgs (/*@notnull@*/ /*@dependent@*/ exprNode f, uentry fcn, | |
1769 | exprNodeList args, exprNode ret, int argno) | |
1770 | { | |
1771 | int i = argno; | |
1772 | fileloc formatloc; | |
1773 | int nargs = exprNodeList_size (args); | |
1774 | uentryList params = uentry_getParams (fcn); | |
1775 | exprNode a; | |
1776 | ||
1777 | /* | |
1778 | ** These should be ensured by checkSpecialFunction | |
1779 | */ | |
1780 | ||
1781 | llassert (uentryList_size (params) == argno + 1); | |
1782 | llassert (uentry_isElipsisMarker (uentryList_getN (params, argno))); | |
1783 | ||
1784 | a = exprNodeList_getN (args, argno - 1); | |
1785 | formatloc = fileloc_copy (exprNode_loc (a)); | |
1786 | ||
1787 | if (exprNode_isDefined (a) && exprNode_isStringLiteral (a) | |
1788 | && exprNode_knownStringValue (a)) | |
1789 | { | |
1790 | char *format = cstring_toCharsSafe (multiVal_forceString (exprNode_getValue (a))); | |
1791 | char *code = format; | |
1792 | char *ocode = code; | |
1793 | ||
1794 | nargs = exprNodeList_size (args); | |
1795 | ||
1796 | while ((code = strchr (code, '%')) != NULL) | |
1797 | { | |
1798 | char *origcode = code; | |
1799 | char key = *(++code); | |
1800 | cstring codetext = cstring_newEmpty (); | |
1801 | ctype modtype = ctype_int; | |
1802 | char modifier = '\0'; | |
1803 | bool modified = TRUE; | |
1804 | bool ignore = FALSE; | |
1805 | ||
1806 | codetext = cstring_appendChar (codetext, key); | |
1807 | fileloc_addColumn (formatloc, code - ocode); | |
1808 | ||
1809 | /* | |
1810 | ** this is based on ANSI standard library description of fscanf | |
1811 | ** (from ANSI standard X3.159-1989, 4.9.6.1) | |
1812 | */ | |
1813 | ||
1814 | /* '*' suppresses assignment (does not need match argument) */ | |
1815 | ||
1816 | if (key == '*') | |
1817 | { | |
1818 | key = *(++code); | |
1819 | codetext = cstring_appendChar (codetext, key); | |
1820 | modified = FALSE; | |
1821 | ignore = TRUE; | |
1822 | fileloc_incColumn (formatloc); | |
1823 | } | |
1824 | ||
1825 | /* ignore field width */ | |
1826 | while (isdigit ((int) key) != 0) | |
1827 | { | |
1828 | key = *(++code); | |
1829 | codetext = cstring_appendChar (codetext, key); | |
1830 | fileloc_incColumn (formatloc); | |
1831 | } | |
1832 | ||
1833 | if (key == 'h') | |
1834 | { | |
1835 | modtype = ctype_sint; /* short */ | |
1836 | key = *(++code); | |
1837 | codetext = cstring_appendChar (codetext, key); | |
1838 | fileloc_incColumn (formatloc); | |
1839 | } | |
1840 | else if (key == 'l' || key == 'L') | |
1841 | { | |
1842 | modtype = ctype_lint; /* long */ | |
1843 | modifier = key; | |
1844 | ||
1845 | key = *(++code); | |
1846 | codetext = cstring_appendChar (codetext, key); | |
1847 | ||
1848 | fileloc_incColumn (formatloc); | |
1849 | ||
1850 | if (key == 'l' || key == 'L') { | |
1851 | modtype = ctype_llint; /* long long */ | |
1852 | key = *(++code); | |
1853 | codetext = cstring_appendChar (codetext, key); | |
1854 | fileloc_incColumn (formatloc); | |
1855 | } | |
1856 | } | |
1857 | else | |
1858 | { | |
1859 | ; /* no modifier */ | |
1860 | } | |
1861 | ||
1862 | /* now, key = type of conversion to apply */ | |
1863 | ++code; | |
1864 | fileloc_incColumn (formatloc); | |
1865 | ||
1866 | if (key != '%') | |
1867 | { | |
1868 | if (ignore) | |
1869 | { | |
1870 | ; | |
1871 | } | |
1872 | else | |
1873 | { | |
1874 | if (i >= nargs) | |
1875 | { | |
1876 | if (optgenerror | |
1877 | (FLG_TYPE, | |
1878 | message ("No argument corresponding to %q format " | |
1879 | "code %d (%%%s): \"%s\"", | |
1880 | uentry_getName (fcn), | |
1881 | i, codetext, | |
1882 | cstring_fromChars (format)), | |
1883 | f->loc)) | |
1884 | { | |
1885 | if (fileloc_isDefined (formatloc) | |
1886 | && context_getFlag (FLG_SHOWCOL)) | |
1887 | { | |
1888 | llgenindentmsg | |
1889 | (cstring_makeLiteral ("Corresponding format code"), | |
1890 | formatloc); | |
1891 | } | |
1892 | } | |
1893 | i++; | |
1894 | } | |
1895 | else | |
1896 | { | |
1897 | a = exprNodeList_getN (args, i); | |
1898 | i++; | |
1899 | ||
1900 | if (!exprNode_isError (a)) | |
1901 | { | |
1902 | ctype expecttype; | |
1903 | ||
1904 | switch (key) | |
1905 | { | |
1906 | case '*': /* int argument for fieldwidth */ | |
1907 | expecttype = ctype_makePointer (ctype_int); | |
1908 | *(--code) = '%'; /* convert it for next code */ | |
1909 | fileloc_subColumn (formatloc, 1); | |
1910 | /*@switchbreak@*/ break; | |
1911 | case 'u': | |
1912 | case 'o': | |
1913 | expecttype = ctype_makePointer (ctype_combine (ctype_uint, modtype)); | |
1914 | /*@switchbreak@*/ break; | |
1915 | ||
1916 | case 'i': | |
1917 | case 'd': | |
1918 | case 'x': | |
1919 | case 'X': /* unsigned int */ | |
1920 | expecttype = ctype_makePointer (ctype_combine (ctype_int, modtype)); | |
1921 | /*@switchbreak@*/ break; | |
1922 | ||
1923 | case 'e': | |
1924 | case 'E': | |
1925 | case 'g': | |
1926 | case 'G': | |
1927 | case 'f': | |
1928 | /* printf is double, scanf is float! */ | |
1929 | ||
1930 | if (modifier == 'l') | |
1931 | { | |
1932 | expecttype = ctype_makePointer (ctype_double); | |
1933 | } | |
1934 | else if (modifier == 'L') | |
1935 | { | |
1936 | expecttype = ctype_makePointer (ctype_ldouble); | |
1937 | } | |
1938 | else | |
1939 | { | |
1940 | llassert (modifier == '\0'); | |
1941 | expecttype = ctype_makePointer (ctype_float); | |
1942 | } | |
1943 | /*@switchbreak@*/ break; | |
1944 | ||
1945 | case 'c': /* int converted to char (check its a char?) */ | |
1946 | expecttype = ctype_makePointer (ctype_makeConj (ctype_char, ctype_uchar)); | |
1947 | /*@switchbreak@*/ break; | |
1948 | ||
1949 | case 's': /* string */ | |
1950 | expecttype = ctype_string; | |
1951 | /*@switchbreak@*/ break; | |
1952 | ||
1953 | case '[': | |
1954 | /* skip to ']' */ | |
1955 | while (((key = *(++code)) != ']') | |
1956 | && (key != '\0')) | |
1957 | { | |
1958 | codetext = cstring_appendChar (codetext, key); | |
1959 | fileloc_incColumn (formatloc); | |
1960 | } | |
1961 | ||
1962 | if (key == '\0') | |
1963 | { | |
1964 | llfatalerrorLoc | |
1965 | (message ("Bad character set format: %s", | |
1966 | cstring_fromChars (origcode))); | |
1967 | } | |
1968 | ||
1969 | expecttype = ctype_string; | |
1970 | /*@switchbreak@*/ break; | |
1971 | ||
1972 | ||
1973 | case 'p': /* pointer */ | |
1974 | voptgenerror | |
1975 | (FLG_FORMATCODE, | |
1976 | message ("Format code should not be used in scanf: %s", | |
1977 | cstring_fromChars (origcode)), | |
1978 | fileloc_isDefined (formatloc) | |
1979 | ? formatloc : g_currentloc); | |
1980 | ||
1981 | expecttype = ctype_unknown; | |
1982 | /*@switchbreak@*/ break; | |
1983 | ||
1984 | case 'n': /* pointer to int, modified by call! */ | |
1985 | expecttype = ctype_makePointer (ctype_int); | |
1986 | /*@switchbreak@*/ break; | |
1987 | ||
1988 | default: | |
1989 | expecttype = ctype_unknown; | |
1990 | ||
1991 | voptgenerror | |
1992 | (FLG_FORMATCODE, | |
1993 | message ("Unrecognized format code: %s", | |
1994 | cstring_fromChars (origcode)), | |
1995 | fileloc_isDefined (formatloc) | |
1996 | ? formatloc : g_currentloc); | |
1997 | ||
1998 | /*@switchbreak@*/ break; | |
1999 | } | |
2000 | ||
2001 | if (!(exprNode_matchArgType (expecttype, a))) | |
2002 | { | |
2003 | if (ctype_isVoidPointer (expecttype) | |
2004 | && ctype_isRealAbstract (a->typ) | |
2005 | && (context_getFlag (FLG_ABSTVOIDP))) | |
2006 | { | |
2007 | ; | |
2008 | } | |
2009 | else | |
2010 | { | |
2011 | if (llgenformattypeerror | |
2012 | (expecttype, exprNode_undefined, | |
2013 | a->typ, a, | |
2014 | message ("Format argument %d to %q (%%%s) expects " | |
2015 | "%t gets %t: %s", | |
2016 | i - argno, | |
2017 | uentry_getName (fcn), | |
2018 | codetext, expecttype, | |
2019 | a->typ, exprNode_unparse (a)), | |
2020 | a->loc)) | |
2021 | { | |
2022 | if (fileloc_isDefined (formatloc) | |
2023 | && context_getFlag (FLG_SHOWCOL)) | |
2024 | { | |
2025 | llgenindentmsg | |
2026 | (cstring_makeLiteral | |
2027 | ("Corresponding format code"), | |
2028 | formatloc); | |
2029 | } | |
2030 | } | |
2031 | } | |
2032 | } | |
2033 | ||
2034 | uentry_setType (outArg, expecttype); | |
2035 | checkOneArg (outArg, a, f, FALSE, i+1, nargs); | |
2036 | uentry_setType (outArg, ctype_unknown); | |
2037 | uentry_fixupSref (outArg); | |
2038 | ||
2039 | if (modified) | |
2040 | { | |
2041 | exprNode_checkCallModifyVal (a->sref, args, f, ret); | |
2042 | } | |
2043 | } | |
2044 | else | |
2045 | { | |
2046 | /* a->sref = defref; */ | |
2047 | } | |
2048 | } | |
2049 | } | |
2050 | } | |
2051 | ||
2052 | ocode = code; | |
2053 | cstring_free (codetext); | |
2054 | } | |
2055 | ||
2056 | if (i < nargs) | |
2057 | { | |
2058 | voptgenerror (FLG_TYPE, | |
2059 | message ("Format string for %q has %d arg%&, given %d", | |
2060 | uentry_getName (fcn), i - argno, nargs - argno), | |
2061 | f->loc); | |
2062 | } | |
2063 | } | |
2064 | else | |
2065 | { | |
2066 | /* no checking possible for compile-time unknown format strings */ | |
2067 | } | |
2068 | ||
2069 | fileloc_free (formatloc); | |
2070 | } | |
2071 | ||
2072 | static void | |
2073 | checkMessageArgs (/*@notnull@*/ /*@dependent@*/ exprNode f, | |
2074 | uentry fcn, | |
2075 | exprNodeList args, | |
2076 | /*@unused@*/ int argno) | |
2077 | { | |
2078 | /* | |
2079 | ** the last argument before the elips is the format string | |
2080 | */ | |
2081 | ||
2082 | int nargs = exprNodeList_size (args); | |
2083 | int i = argno; | |
2084 | fileloc formatloc; | |
2085 | exprNode a; | |
2086 | ||
2087 | a = exprNodeList_getN (args, argno - 1); | |
2088 | formatloc = fileloc_copy (exprNode_loc (a)); | |
2089 | ||
2090 | if (ctype_isUnknown (cstringType)) { | |
2091 | if (usymtab_existsType (cstring_makeLiteralTemp ("cstring"))) | |
2092 | { | |
2093 | cstringType = usymtab_lookupAbstractType (cstring_makeLiteralTemp ("cstring")); | |
2094 | } | |
2095 | } | |
2096 | ||
2097 | if (ctype_isUnknown (ctypeType)) { | |
2098 | if (usymtab_existsType (cstring_makeLiteralTemp ("ctype"))) | |
2099 | { | |
2100 | ctypeType = usymtab_lookupAbstractType (cstring_makeLiteralTemp ("ctype")); | |
2101 | } | |
2102 | } | |
2103 | ||
2104 | if (ctype_isUnknown (filelocType)) { | |
2105 | if (usymtab_existsType (cstring_makeLiteralTemp ("fileloc"))) | |
2106 | { | |
2107 | filelocType = usymtab_lookupAbstractType (cstring_makeLiteralTemp ("fileloc")); | |
2108 | } | |
2109 | } | |
2110 | ||
2111 | if (exprNode_isDefined (a) && exprNode_isStringLiteral (a) | |
2112 | && exprNode_knownStringValue (a)) | |
2113 | { | |
2114 | cstring format = multiVal_forceString (exprNode_getValue (a)); | |
2115 | char *code = cstring_toCharsSafe (format); | |
2116 | char *ocode = code; | |
2117 | ||
2118 | nargs = exprNodeList_size (args); | |
2119 | ||
2120 | while ((code = strchr (code, '%')) != NULL) | |
2121 | { | |
2122 | char *origcode = code; | |
2123 | char key = *(++code); | |
2124 | cstring codetext = cstring_newEmpty (); | |
2125 | bool isOnly = FALSE; | |
2126 | ||
2127 | codetext = cstring_appendChar (codetext, key); | |
2128 | ||
2129 | fileloc_addColumn (formatloc, code - ocode); | |
2130 | ||
2131 | while (key >= '0' && key <= '9') | |
2132 | { | |
2133 | key = *(++code); | |
2134 | codetext = cstring_appendChar (codetext, key); | |
2135 | fileloc_incColumn (formatloc); | |
2136 | } | |
2137 | ||
2138 | ++code; | |
2139 | fileloc_incColumn (formatloc); | |
2140 | ||
2141 | if (key != '%') | |
2142 | { | |
2143 | if (key == '&') /* plural marker */ | |
2144 | { | |
2145 | goto nextKey; | |
2146 | } | |
2147 | ||
2148 | if (i >= nargs) | |
2149 | { | |
2150 | voptgenerror | |
2151 | (FLG_TYPE, | |
2152 | message ("Message missing format arg %d (%%%s): \"%s\"", | |
2153 | i + 1, codetext, format), | |
2154 | f->loc); | |
2155 | i++; | |
2156 | } | |
2157 | else | |
2158 | { | |
2159 | a = exprNodeList_getN (args, i); | |
2160 | i++; | |
2161 | ||
2162 | nextKey: | |
2163 | if (!exprNode_isError (a)) | |
2164 | { | |
2165 | ctype expecttype; | |
2166 | ||
2167 | /*@-loopswitchbreak@*/ | |
2168 | ||
2169 | switch (key) | |
2170 | { | |
2171 | case 'c': | |
2172 | case 'h': | |
2173 | expecttype = ctype_char; break; | |
2174 | case 's': | |
2175 | expecttype = cstringType; break; | |
2176 | case 'q': | |
2177 | expecttype = cstringType; isOnly = TRUE; break; | |
2178 | case 'x': | |
2179 | expecttype = cstringType; isOnly = TRUE; break; | |
2180 | case 'd': expecttype = ctype_int; break; | |
2181 | case 'u': expecttype = ctype_uint; break; | |
2182 | case 'w': expecttype = ctype_ulint; break; | |
2183 | case 'f': expecttype = ctype_float; break; | |
2184 | case 'b': expecttype = ctype_bool; break; | |
2185 | case 't': expecttype = ctypeType; break; | |
2186 | case 'l': expecttype = filelocType; break; | |
2187 | case '&': /* a wee bit of a hack methinks */ | |
2188 | expecttype = ctype_int; | |
2189 | break; | |
2190 | case 'r': expecttype = ctype_bool; break; | |
2191 | default: | |
2192 | expecttype = ctype_unknown; | |
2193 | voptgenerror | |
2194 | (FLG_FORMATCODE, | |
2195 | message ("Unrecognized format code: %s", | |
2196 | cstring_fromChars (origcode)), | |
2197 | fileloc_isDefined (formatloc) | |
2198 | ? formatloc : g_currentloc); | |
2199 | break; | |
2200 | } | |
2201 | /*@=loopswitchbreak@*/ | |
2202 | ||
2203 | if (!(exprNode_matchArgType (expecttype, a))) | |
2204 | { | |
2205 | if (ctype_isVoidPointer (expecttype) | |
2206 | && ctype_isRealAbstract (a->typ) | |
2207 | && (context_getFlag (FLG_ABSTVOIDP))) | |
2208 | { | |
2209 | ; | |
2210 | } | |
2211 | else | |
2212 | { | |
2213 | if (llgenformattypeerror | |
2214 | (expecttype, exprNode_undefined, | |
2215 | a->typ, a, | |
2216 | message ("Format argument %d to %q (%%%s) expects " | |
2217 | "%t gets %t: %s", | |
2218 | i - argno, | |
2219 | uentry_getName (fcn), | |
2220 | codetext, expecttype, | |
2221 | a->typ, exprNode_unparse (a)), | |
2222 | a->loc)) | |
2223 | { | |
2224 | if (fileloc_isDefined (formatloc) | |
2225 | && context_getFlag (FLG_SHOWCOL)) | |
2226 | { | |
2227 | llgenindentmsg | |
2228 | (cstring_makeLiteral | |
2229 | ("Corresponding format code"), | |
2230 | formatloc); | |
2231 | } | |
2232 | } | |
2233 | } | |
2234 | } | |
2235 | ||
2236 | if (ctype_equal (expecttype, cstringType)) | |
2237 | { | |
2238 | if (isOnly) | |
2239 | { | |
2240 | checkOneArg (csOnlyArg, a, f, FALSE, i+1, nargs); | |
2241 | uentry_fixupSref (csOnlyArg); | |
2242 | } | |
2243 | else | |
2244 | { | |
2245 | checkOneArg (csArg, a, f, FALSE, i+1, nargs); | |
2246 | uentry_fixupSref (csArg); | |
2247 | } | |
2248 | } | |
2249 | else | |
2250 | { | |
2251 | checkOneArg (regArg, a, f, FALSE, i+1, nargs); | |
2252 | uentry_fixupSref (regArg); | |
2253 | } | |
2254 | } | |
2255 | } | |
2256 | } | |
2257 | ||
2258 | cstring_free (codetext); | |
2259 | } | |
2260 | ||
2261 | if (i < nargs) | |
2262 | { | |
2263 | voptgenerror (FLG_TYPE, | |
2264 | message ("Format string for %q has %d arg%&, given %d", | |
2265 | uentry_getName (fcn), i - argno, nargs -argno), | |
2266 | f->loc); | |
2267 | } | |
2268 | } | |
2269 | else | |
2270 | { | |
2271 | /* no checking possible for compile-time unknown format strings */ | |
2272 | } | |
2273 | ||
2274 | fileloc_free (formatloc); | |
2275 | } | |
2276 | ||
2277 | static void | |
2278 | checkExpressionDefinedAux (/*@notnull@*/ exprNode e1, | |
2279 | /*@notnull@*/ exprNode e2, | |
2280 | sRefSet sets1, | |
2281 | sRefSet sets2, | |
2282 | lltok op, | |
2283 | flagcode flag) | |
2284 | { | |
2285 | bool hadUncon = FALSE; | |
2286 | ||
2287 | if (sRef_isFileOrGlobalScope (sRef_getRootBase (e1->sref)) && | |
2288 | sRefSet_hasUnconstrained (sets2)) | |
2289 | { | |
2290 | voptgenerror | |
2291 | (FLG_EVALORDERUNCON, | |
2292 | message | |
2293 | ("Expression may have undefined behavior (%q used in right operand " | |
2294 | "may set global variable %q used in left operand): %s %s %s", | |
2295 | sRefSet_unparseUnconstrained (sets2), | |
2296 | sRef_unparse (sRef_getRootBase (e1->sref)), | |
2297 | exprNode_unparse (e1), lltok_unparse (op), exprNode_unparse (e2)), | |
2298 | e2->loc); | |
2299 | } | |
2300 | ||
2301 | if (sRef_isFileOrGlobalScope (sRef_getRootBase (e2->sref)) && | |
2302 | sRefSet_hasUnconstrained (sets1)) | |
2303 | { | |
2304 | voptgenerror | |
2305 | (FLG_EVALORDERUNCON, | |
2306 | message | |
2307 | ("Expression has undefined behavior (%q used in left operand " | |
2308 | "may set global variable %q used in right operand): %s %s %s", | |
2309 | sRefSet_unparseUnconstrained (sets1), | |
2310 | sRef_unparse (e2->sref), | |
2311 | exprNode_unparse (e1), lltok_unparse (op), exprNode_unparse (e2)), | |
2312 | e2->loc); | |
2313 | } | |
2314 | ||
2315 | sRefSet_realElements (e1->uses, sr) | |
2316 | { | |
2317 | if (sRef_isMeaningful (sr) && sRefSet_member (sets2, sr)) | |
2318 | { | |
2319 | voptgenerror | |
2320 | (FLG_EVALORDER, | |
2321 | message | |
2322 | ("Expression has undefined behavior (left operand uses %q, " | |
2323 | "modified by right operand): %s %s %s", | |
2324 | sRef_unparse (sr), | |
2325 | exprNode_unparse (e1), lltok_unparse (op), exprNode_unparse (e2)), | |
2326 | e2->loc); | |
2327 | } | |
2328 | } end_sRefSet_realElements; | |
2329 | ||
2330 | sRefSet_realElements (sets1, sr) | |
2331 | { | |
2332 | if (sRef_isMeaningful (sr)) | |
2333 | { | |
2334 | if (sRef_same (sr, e2->sref)) | |
2335 | { | |
2336 | voptgenerror | |
2337 | (flag, | |
2338 | message | |
2339 | ("Expression has undefined behavior (value of right operand " | |
2340 | "modified by left operand): %s %s %s", | |
2341 | exprNode_unparse (e1), lltok_unparse (op), exprNode_unparse (e2)), | |
2342 | e2->loc); | |
2343 | } | |
2344 | else if (sRefSet_member (e2->uses, sr)) | |
2345 | { | |
2346 | voptgenerror | |
2347 | (flag, | |
2348 | message | |
2349 | ("Expression has undefined behavior (left operand modifies %q, " | |
2350 | "used by right operand): %s %s %s", | |
2351 | sRef_unparse (sr), | |
2352 | exprNode_unparse (e1), lltok_unparse (op), exprNode_unparse (e2)), | |
2353 | e2->loc); | |
2354 | } | |
2355 | else | |
2356 | { | |
2357 | if (sRefSet_member (sets2, sr)) | |
2358 | { | |
2359 | if (sRef_isUnconstrained (sr)) | |
2360 | { | |
2361 | if (hadUncon) | |
2362 | { | |
2363 | ; | |
2364 | } | |
2365 | else | |
2366 | { | |
2367 | hadUncon = optgenerror | |
2368 | (FLG_EVALORDERUNCON, | |
2369 | message | |
2370 | ("Expression may have undefined behavior. Left operand " | |
2371 | "calls %q; right operand calls %q. The unconstrained " | |
2372 | "functions may modify global state used by " | |
2373 | "the other operand): %s %s %s", | |
2374 | sRefSet_unparseUnconstrained (sets1), | |
2375 | sRefSet_unparseUnconstrained (sets2), | |
2376 | exprNode_unparse (e1), lltok_unparse (op), | |
2377 | exprNode_unparse (e2)), | |
2378 | e2->loc); | |
2379 | } | |
2380 | } | |
2381 | else | |
2382 | { | |
2383 | voptgenerror | |
2384 | (flag, | |
2385 | message | |
2386 | ("Expression has undefined behavior (both " | |
2387 | "operands modify %q): %s %s %s", | |
2388 | sRef_unparse (sr), | |
2389 | exprNode_unparse (e1), | |
2390 | lltok_unparse (op), exprNode_unparse (e2)), | |
2391 | e2->loc); | |
2392 | } | |
2393 | } | |
2394 | } | |
2395 | } | |
2396 | } end_sRefSet_realElements; | |
2397 | } | |
2398 | ||
2399 | static void checkExpressionDefined (exprNode e1, exprNode e2, lltok op) | |
2400 | { | |
2401 | bool hasError = FALSE; | |
2402 | ||
2403 | if (exprNode_isError (e1) || exprNode_isError (e2)) | |
2404 | { | |
2405 | return; | |
2406 | } | |
2407 | ||
2408 | if (sRefSet_member (e2->sets, e1->sref)) | |
2409 | { | |
2410 | if (e2->kind == XPR_CALL) | |
2411 | { | |
2412 | ; | |
2413 | } | |
2414 | else | |
2415 | { | |
2416 | hasError = optgenerror | |
2417 | (FLG_EVALORDER, | |
2418 | message ("Expression has undefined behavior " | |
2419 | "(value of left operand %s is modified " | |
2420 | "by right operand %s): %s %s %s", | |
2421 | exprNode_unparse (e1), | |
2422 | exprNode_unparse (e2), | |
2423 | exprNode_unparse (e1), lltok_unparse (op), | |
2424 | exprNode_unparse (e2)), | |
2425 | e2->loc); | |
2426 | } | |
2427 | } | |
2428 | ||
2429 | if (context_getFlag (FLG_EVALORDERUNCON)) | |
2430 | { | |
2431 | if (sRefSet_member (e2->msets, e1->sref)) | |
2432 | { | |
2433 | if (e2->kind == XPR_CALL) | |
2434 | { | |
2435 | ; | |
2436 | } | |
2437 | else | |
2438 | { | |
2439 | hasError = optgenerror | |
2440 | (FLG_EVALORDER, | |
2441 | message | |
2442 | ("Expression has undefined behavior (value of left " | |
2443 | "operand may be modified by right operand): %s %s %s", | |
2444 | exprNode_unparse (e1), lltok_unparse (op), | |
2445 | exprNode_unparse (e2)), | |
2446 | e2->loc); | |
2447 | } | |
2448 | } | |
2449 | } | |
2450 | ||
2451 | if (!hasError) | |
2452 | { | |
2453 | checkExpressionDefinedAux (e1, e2, e1->sets, e2->sets, op, FLG_EVALORDER); | |
2454 | ||
2455 | if (context_maybeSet (FLG_EVALORDERUNCON)) | |
2456 | { | |
2457 | checkExpressionDefinedAux (e1, e2, e1->msets, | |
2458 | e2->msets, op, FLG_EVALORDERUNCON); | |
2459 | } | |
2460 | } | |
2461 | } | |
2462 | ||
2463 | static void checkSequencing (exprNode p_f, exprNodeList p_args); | |
2464 | ||
2465 | static int | |
2466 | checkArgsReal (uentry fcn, /*@dependent@*/ exprNode f, uentryList cl, | |
2467 | exprNodeList args, bool isIter, exprNode ret) | |
2468 | { | |
2469 | int special = 0; | |
2470 | ||
2471 | if (!exprNode_isError (f)) | |
2472 | { | |
2473 | if (!uentryList_isMissingParams (cl)) | |
2474 | { | |
2475 | int nargs = exprNodeList_size (args); | |
2476 | int expectargs = uentryList_size (cl); | |
2477 | ctype last; | |
2478 | int i = 0; | |
2479 | ||
2480 | if (expectargs == 0) | |
2481 | { | |
2482 | if (nargs != 0) | |
2483 | { | |
2484 | if (isIter) | |
2485 | { | |
2486 | voptgenerror | |
2487 | (FLG_TYPE, | |
2488 | message ("Iter %q invoked with %d args, " | |
2489 | "declared void", | |
2490 | uentry_getName (fcn), | |
2491 | nargs), | |
2492 | f->loc); | |
2493 | } | |
2494 | else | |
2495 | { | |
2496 | voptgenerror | |
2497 | (FLG_TYPE, | |
2498 | message ("Function %s called with %d args, " | |
2499 | "declared void", | |
2500 | exprNode_unparse (f), nargs), | |
2501 | f->loc); | |
2502 | } | |
2503 | } | |
2504 | return special; | |
2505 | } | |
2506 | ||
2507 | last = uentry_getType (uentryList_getN (cl, expectargs - 1)); | |
2508 | ||
2509 | exprNodeList_reset (args); | |
2510 | ||
2511 | uentryList_elements (cl, current) | |
2512 | { | |
2513 | ctype ct = uentry_getType (current); | |
2514 | exprNode a; | |
2515 | ||
2516 | if (ctype_isElips (ct)) | |
2517 | { | |
2518 | /* | |
2519 | ** do special checking for printf/scanf library functions | |
2520 | ** | |
2521 | ** this is kludgey code, just for handling the special case | |
2522 | ** | |
2523 | */ | |
2524 | ||
2525 | if (uentry_isPrintfLike (fcn)) | |
2526 | { | |
2527 | checkPrintfArgs (f, fcn, args, ret, i); | |
2528 | special = i; | |
2529 | } | |
2530 | else if (uentry_isScanfLike (fcn)) | |
2531 | { | |
2532 | checkScanfArgs (f, fcn, args, ret, i); | |
2533 | special = i; | |
2534 | } | |
2535 | else if (uentry_isMessageLike (fcn)) | |
2536 | { | |
2537 | checkMessageArgs (f, fcn, args, i); | |
2538 | special = i; | |
2539 | } | |
2540 | else | |
2541 | { | |
2542 | llassert (!uentry_isSpecialFunction (fcn)); | |
2543 | } | |
2544 | ||
2545 | nargs = expectargs; /* avoid errors */ | |
2546 | break; | |
2547 | } | |
2548 | else | |
2549 | { | |
2550 | if (i >= nargs) break; | |
2551 | ||
2552 | a = exprNodeList_current (args); | |
2553 | exprNodeList_advance (args); | |
2554 | ||
2555 | i++; | |
2556 | ||
2557 | if (exprNode_isError (a)) | |
2558 | { | |
2559 | ; | |
2560 | } | |
2561 | else | |
2562 | { | |
2563 | /* | |
2564 | probably necessary? I'm not sure about this one | |
2565 | checkMacroParen (a); | |
2566 | */ | |
2567 | ||
2568 | f->guards = guardSet_union (f->guards, a->guards); | |
2569 | ||
2570 | DPRINTF (("match arg: %s / %s", ctype_unparse (ct), ctype_unparse (a->typ))); | |
2571 | ||
2572 | if (!(exprNode_matchArgType (ct, a))) | |
2573 | { | |
2574 | DPRINTF (("Args mismatch!")); | |
2575 | ||
2576 | if (ctype_isVoidPointer (ct) | |
2577 | && (ctype_isPointer (a->typ) | |
2578 | && (ctype_isRealAbstract (ctype_baseArrayPtr (a->typ))))) | |
2579 | { | |
2580 | vnoptgenerror | |
2581 | (FLG_ABSTVOIDP, | |
2582 | message | |
2583 | ("Pointer to abstract type (%t) used " | |
2584 | "as void pointer " | |
2585 | "(arg %d to %q): %s", | |
2586 | a->typ, i, | |
2587 | uentry_getName (fcn), | |
2588 | exprNode_unparse (a)), | |
2589 | a->loc); | |
2590 | } | |
2591 | else | |
2592 | { | |
2593 | if (isIter) | |
2594 | { | |
2595 | (void) gentypeerror | |
2596 | (ct, exprNode_undefined, | |
2597 | a->typ, a, | |
2598 | message | |
2599 | ("Iter %q expects arg %d to " | |
2600 | "be %t gets %t: %s", | |
2601 | uentry_getName (fcn), | |
2602 | i, ct, a->typ, exprNode_unparse (a)), | |
2603 | a->loc); | |
2604 | } | |
2605 | else | |
2606 | { | |
2607 | if (gentypeerror | |
2608 | (ct, | |
2609 | exprNode_undefined, | |
2610 | a->typ, | |
2611 | a, | |
2612 | message | |
2613 | ("Function %q expects arg %d to be %t gets %t: %s", | |
2614 | uentry_getName (fcn), | |
2615 | i, ct, a->typ, exprNode_unparse (a)), | |
2616 | a->loc)) | |
2617 | { | |
2618 | DPRINTF (("Types: %s / %s", | |
2619 | ctype_unparse (ct), | |
2620 | ctype_unparse (a->typ))); | |
2621 | } | |
2622 | ||
2623 | /* | |
2624 | ** Clear null marker for abstract types. | |
2625 | ** (It is not revealed, so suppress future messages.) | |
2626 | */ | |
2627 | ||
2628 | if (ctype_isAbstract (a->typ)) | |
2629 | { | |
2630 | sRef_setNullUnknown (exprNode_getSref (a), a->loc); | |
2631 | } | |
2632 | } | |
2633 | } | |
2634 | } | |
2635 | } | |
2636 | } | |
2637 | } end_uentryList_elements ; | |
2638 | ||
2639 | ||
2640 | if (expectargs != nargs) /* note: not != since we may have ... */ | |
2641 | { | |
2642 | if (ctype_isElips (last)) | |
2643 | { | |
2644 | voptgenerror | |
2645 | (FLG_TYPE, | |
2646 | message ("Function %s called with %d args, expects at least %d", | |
2647 | exprNode_unparse (f), | |
2648 | nargs, expectargs - 1), | |
2649 | f->loc); | |
2650 | } | |
2651 | else | |
2652 | { | |
2653 | if (isIter) | |
2654 | { | |
2655 | voptgenerror | |
2656 | (FLG_TYPE, | |
2657 | message ("Iter %q invoked with %d args, expects %d", | |
2658 | uentry_getName (fcn), nargs, expectargs), | |
2659 | f->loc); | |
2660 | } | |
2661 | else | |
2662 | { | |
2663 | voptgenerror | |
2664 | (FLG_TYPE, | |
2665 | message ("Function %s called with %d args, expects %d", | |
2666 | exprNode_unparse (f), | |
2667 | nargs, expectargs), | |
2668 | f->loc); | |
2669 | } | |
2670 | } | |
2671 | } | |
2672 | } | |
2673 | } | |
2674 | ||
2675 | return special; | |
2676 | } | |
2677 | ||
2678 | /* | |
2679 | ** Check for undefined code sequences in function arguments: | |
2680 | ** | |
2681 | ** one parameter sets something used by another parameter | |
2682 | ** one parameter sets something set by another parameter | |
2683 | */ | |
2684 | ||
2685 | static void | |
2686 | checkSequencingOne (exprNode f, exprNodeList args, | |
2687 | /*@notnull@*/ exprNode el, int argno) | |
2688 | { | |
2689 | /* | |
2690 | ** Do second loop, iff +undefunspec | |
2691 | */ | |
2692 | ||
2693 | int checkloop; | |
2694 | int numloops = context_maybeSet (FLG_EVALORDERUNCON) ? 2 : 1; | |
2695 | ||
2696 | for (checkloop = 0; checkloop < numloops; checkloop++) | |
2697 | { | |
2698 | sRefSet thissets; | |
2699 | ||
2700 | if (checkloop == 0) | |
2701 | { | |
2702 | thissets = el->sets; | |
2703 | } | |
2704 | else | |
2705 | { | |
2706 | llassert (checkloop == 1); | |
2707 | thissets = el->msets; | |
2708 | } | |
2709 | ||
2710 | sRefSet_realElements (thissets, thisset) | |
2711 | { | |
2712 | int j; | |
2713 | ||
2714 | /*@access exprNodeList@*/ | |
2715 | for (j = 0; j < args->nelements; j++) | |
2716 | { | |
2717 | exprNode jl = args->elements[j]; | |
2718 | int thisargno = j + 1; | |
2719 | ||
2720 | if (thisargno != argno && exprNode_isDefined (jl)) | |
2721 | { | |
2722 | sRefSet otheruses = jl->uses; | |
2723 | ||
2724 | if (sRef_isFileOrGlobalScope (sRef_getRootBase (jl->sref)) && | |
2725 | sRefSet_hasUnconstrained (thissets)) | |
2726 | { | |
2727 | voptgenerror | |
2728 | (FLG_EVALORDERUNCON, | |
2729 | /*@-sefparams@*/ | |
2730 | message | |
2731 | ("%q used in argument %d may set " | |
2732 | "global variable %q used by argument %d: %s(%q)", | |
2733 | cstring_capitalizeFree (sRefSet_unparseUnconstrained (thissets)), | |
2734 | /*@=sefparams@*/ | |
2735 | argno, | |
2736 | sRef_unparse (sRef_getRootBase (jl->sref)), | |
2737 | thisargno, | |
2738 | exprNode_unparse (f), exprNodeList_unparse (args)), | |
2739 | el->loc); | |
2740 | } | |
2741 | ||
2742 | if (sRefSet_member (otheruses, thisset)) | |
2743 | { | |
2744 | if (sRef_isUnconstrained (thisset)) | |
2745 | { | |
2746 | voptgenerror | |
2747 | (FLG_EVALORDERUNCON, | |
2748 | message | |
2749 | ("Unconstrained functions used in arguments %d (%q) " | |
2750 | "and %d (%s) may modify " | |
2751 | "or use global state in undefined way: %s(%q)", | |
2752 | argno, | |
2753 | sRefSet_unparseUnconstrainedPlain (otheruses), | |
2754 | thisargno, | |
2755 | sRef_unconstrainedName (thisset), | |
2756 | exprNode_unparse (f), | |
2757 | exprNodeList_unparse (args)), | |
2758 | el->loc); | |
2759 | } | |
2760 | else | |
2761 | { | |
2762 | voptgenerror | |
2763 | (FLG_EVALORDER, | |
2764 | message | |
2765 | ("Argument %d modifies %q, used by argument %d " | |
2766 | "(order of evaluation of actual parameters is " | |
2767 | "undefined): %s(%q)", | |
2768 | argno, sRef_unparse (thisset), thisargno, | |
2769 | exprNode_unparse (f), exprNodeList_unparse (args)), | |
2770 | el->loc); | |
2771 | } | |
2772 | } | |
2773 | else | |
2774 | { | |
2775 | sRefSet othersets = jl->sets; | |
2776 | ||
2777 | if (sRefSet_member (othersets, thisset)) | |
2778 | { | |
2779 | if (sRef_isUnconstrained (thisset)) | |
2780 | { | |
2781 | voptgenerror | |
2782 | (FLG_EVALORDERUNCON, | |
2783 | message | |
2784 | ("Unconstrained functions used in " | |
2785 | "arguments %d (%q) and %d (%s) may modify " | |
2786 | "or use global state in undefined way: %s(%q)", | |
2787 | argno, | |
2788 | sRefSet_unparseUnconstrainedPlain (othersets), | |
2789 | thisargno, | |
2790 | sRef_unconstrainedName (thisset), | |
2791 | exprNode_unparse (f), exprNodeList_unparse (args)), | |
2792 | el->loc); | |
2793 | } | |
2794 | else | |
2795 | { | |
2796 | voptgenerror | |
2797 | (FLG_EVALORDER, | |
2798 | message | |
2799 | ("Argument %d modifies %q, set by argument %d (order of" | |
2800 | " evaluation of actual parameters is undefined): %s(%q)", | |
2801 | argno, sRef_unparse (thisset), thisargno, | |
2802 | exprNode_unparse (f), exprNodeList_unparse (args)), | |
2803 | el->loc); | |
2804 | } | |
2805 | } | |
2806 | } | |
2807 | } | |
2808 | } | |
2809 | /*@noaccess exprNodeList@*/ | |
2810 | } end_sRefSet_realElements; | |
2811 | } | |
2812 | } | |
2813 | ||
2814 | static void | |
2815 | checkSequencing (exprNode f, exprNodeList args) | |
2816 | { | |
2817 | if (exprNodeList_size (args) > 1) | |
2818 | { | |
2819 | int i; | |
2820 | exprNode el; | |
2821 | ||
2822 | /*@access exprNodeList*/ | |
2823 | ||
2824 | for (i = 0; i < args->nelements; i++) | |
2825 | { | |
2826 | el = args->elements[i]; | |
2827 | ||
2828 | if (!exprNode_isError (el)) | |
2829 | { | |
2830 | checkSequencingOne (f, args, el, i + 1); | |
2831 | } | |
2832 | } | |
2833 | /*@noaccess exprNodeList*/ | |
2834 | } | |
2835 | } | |
2836 | ||
2837 | /* | |
2838 | ** requires le = exprNode_getUentry (f) | |
2839 | */ | |
2840 | ||
2841 | static void | |
2842 | checkGlobMods (/*@notnull@*/ /*@dependent@*/ exprNode f, | |
2843 | uentry le, exprNodeList args, | |
2844 | /*@notnull@*/ exprNode ret, int specialArgs) | |
2845 | { | |
2846 | bool isSpec = FALSE; | |
2847 | bool hasMods = FALSE; | |
2848 | cstring fname; | |
2849 | globSet usesGlobs = globSet_undefined; | |
2850 | sRefSet mods = sRefSet_undefined; | |
2851 | bool freshMods = FALSE; | |
2852 | uentryList params = uentryList_undefined; | |
2853 | ||
2854 | DPRINTF (("Check glob mods: %s", exprNode_unparse (ret))); | |
2855 | ||
2856 | /* | |
2857 | ** check globals and modifies | |
2858 | */ | |
2859 | ||
2860 | setCodePoint (); | |
2861 | ||
2862 | if (!uentry_isValid (le)) | |
2863 | { | |
2864 | ctype fr = ctype_realType (f->typ); | |
2865 | ||
2866 | if (ctype_isFunction (fr)) | |
2867 | { | |
2868 | params = ctype_argsFunction (fr); | |
2869 | } | |
2870 | else | |
2871 | { | |
2872 | params = uentryList_missingParams; | |
2873 | } | |
2874 | ||
2875 | if (!context_getFlag (FLG_MODNOMODS) | |
2876 | && !context_getFlag (FLG_GLOBUNSPEC)) | |
2877 | { | |
2878 | checkUnspecCall (f, params, args); | |
2879 | } | |
2880 | ||
2881 | return; | |
2882 | } | |
2883 | ||
2884 | fname = uentry_rawName (le); | |
2885 | ||
2886 | setCodePoint (); | |
2887 | ||
2888 | if (uentry_isFunction (le)) | |
2889 | { | |
2890 | params = uentry_getParams (le); | |
2891 | mods = uentry_getMods (le); | |
2892 | hasMods = uentry_hasMods (le); | |
2893 | usesGlobs = uentry_getGlobs (le); | |
2894 | isSpec = uentry_isSpecified (le); | |
2895 | } | |
2896 | else /* not a function */ | |
2897 | { | |
2898 | ctype ct = ctype_realType (uentry_getType (le)); | |
2899 | ||
2900 | llassertprint (uentry_isVar (le) && ctype_isFunction (ct), | |
2901 | ("checkModGlobs: uentry not a function: %s", | |
2902 | uentry_unparse (le))); | |
2903 | ||
2904 | params = ctype_argsFunction (ct); | |
2905 | return; /*@32 ! remove this? */ | |
2906 | } | |
2907 | ||
2908 | /* | |
2909 | ** check globals | |
2910 | */ | |
2911 | ||
2912 | setCodePoint (); | |
2913 | ||
2914 | globSet_allElements (usesGlobs, el) | |
2915 | { | |
2916 | if (sRef_isValid (el)) | |
2917 | { | |
2918 | if (sRef_isInternalState (el) || sRef_isSystemState (el)) | |
2919 | { | |
2920 | context_usedGlobal (el); | |
2921 | exprNode_checkUse (f, el, f->loc); | |
2922 | ||
2923 | if (context_checkInternalUse ()) | |
2924 | { | |
2925 | if (!context_globAccess (el)) | |
2926 | { | |
2927 | if (sRef_isSystemState (el) | |
2928 | && !context_getFlag (FLG_MODFILESYSTEM)) | |
2929 | { | |
2930 | ; | |
2931 | } | |
2932 | else | |
2933 | { | |
2934 | voptgenerror | |
2935 | (FLG_INTERNALGLOBS, | |
2936 | message | |
2937 | ("Called procedure %s may access %q, but " | |
2938 | "globals list does not include globals %s", | |
2939 | exprNode_unparse (f), | |
2940 | sRef_unparse (el), | |
2941 | cstring_makeLiteralTemp (sRef_isInternalState (el) | |
2942 | ? "internalState" | |
2943 | : "fileSystem")), | |
2944 | f->loc); | |
2945 | } | |
2946 | } | |
2947 | } | |
2948 | } | |
2949 | else if (sRef_isNothing (el) || sRef_isSpecState (el)) | |
2950 | { | |
2951 | ; | |
2952 | } | |
2953 | else | |
2954 | { | |
2955 | uentry gle = sRef_getUentry (el); | |
2956 | sRef sr = sRef_updateSref (el); | |
2957 | ||
2958 | if (sRef_isUndefGlob (el)) | |
2959 | { | |
2960 | sRef_setDefined (sr, f->loc); | |
2961 | exprNode_checkSet (f, sr); | |
2962 | } | |
2963 | else | |
2964 | { | |
2965 | /* | |
2966 | ** check definition | |
2967 | */ | |
2968 | ||
2969 | if (sRef_isAllocated (el)) | |
2970 | { | |
2971 | exprNode_checkSet (f, sr); | |
2972 | } | |
2973 | else | |
2974 | { | |
2975 | if (sRef_isStateUndefined (sr)) | |
2976 | { | |
2977 | voptgenerror | |
2978 | (FLG_GLOBSTATE, | |
2979 | message | |
2980 | ("%s %q used by function undefined before call: %s", | |
2981 | sRef_getScopeName (sr), | |
2982 | sRef_unparse (sr), | |
2983 | exprNode_unparse (f)), | |
2984 | f->loc); | |
2985 | sRef_setDefined (sr, f->loc); | |
2986 | } | |
2987 | exprNode_checkUse (f, sr, f->loc); | |
2988 | } | |
2989 | ||
2990 | checkGlobUse (gle, TRUE, f); | |
2991 | } | |
2992 | ||
2993 | if (sRef_isKilledGlob (el)) | |
2994 | { | |
2995 | sRef_kill (sr, f->loc); | |
2996 | context_usedGlobal (sr); | |
2997 | } | |
2998 | } | |
2999 | } | |
3000 | } end_globSet_allElements; | |
3001 | ||
3002 | /* | |
3003 | ** check modifies | |
3004 | */ | |
3005 | ||
3006 | if (context_hasMods () || context_getFlag (FLG_MODNOMODS)) | |
3007 | { | |
3008 | sRefSet smods = sRefSet_undefined; | |
3009 | ||
3010 | /* | |
3011 | ** NEED to check for modifies anything | |
3012 | */ | |
3013 | ||
3014 | /* | |
3015 | ** check each sRef that called function modifies (ml), is | |
3016 | ** modifiable by tl | |
3017 | */ | |
3018 | ||
3019 | setCodePoint (); | |
3020 | ||
3021 | sRefSet_allElements (mods, s) /* s is something which may be modified */ | |
3022 | { | |
3023 | DPRINTF (("Check modify: %s", sRef_unparse (s))); | |
3024 | ||
3025 | if (sRef_isKindSpecial (s)) | |
3026 | { | |
3027 | if (sRef_isSpecInternalState (s)) | |
3028 | { | |
3029 | if (context_getFlag (FLG_MODINTERNALSTRICT)) | |
3030 | { | |
3031 | exprNode_checkCallModifyVal (s, args, f, ret); | |
3032 | } | |
3033 | else | |
3034 | { | |
3035 | sRefSet mmods = context_modList (); | |
3036 | ||
3037 | sRefSet_allElements (mmods, el) | |
3038 | { | |
3039 | if (sRef_isInternalState (el)) | |
3040 | { | |
3041 | sRef_setModified (el); | |
3042 | } | |
3043 | } end_sRefSet_allElements ; | |
3044 | } | |
3045 | } | |
3046 | else | |
3047 | { | |
3048 | exprNode_checkCallModifyVal (s, args, f, ret); | |
3049 | } | |
3050 | } | |
3051 | else | |
3052 | { | |
3053 | sRef rb = sRef_getRootBase (s); | |
3054 | ||
3055 | if (sRef_isFileOrGlobalScope (rb)) | |
3056 | { | |
3057 | context_usedGlobal (rb); | |
3058 | } | |
3059 | ||
3060 | if (sRef_isFileStatic (s) | |
3061 | && !fileId_equal (fileloc_fileId (f->loc), | |
3062 | fileloc_fileId (uentry_whereDefined (le)))) | |
3063 | { | |
3064 | smods = sRefSet_insert (smods, s); | |
3065 | } | |
3066 | else | |
3067 | { | |
3068 | exprNode_checkCallModifyVal (s, args, f, ret); | |
3069 | } | |
3070 | } | |
3071 | } end_sRefSet_allElements; | |
3072 | ||
3073 | setCodePoint (); | |
3074 | ||
3075 | /* | |
3076 | ** Static elements in modifies set can have nasty consequences. | |
3077 | ** (I think...have not been able to reproduce a possible bug.) | |
3078 | */ | |
3079 | ||
3080 | if (!sRefSet_isDefined (smods)) | |
3081 | { | |
3082 | mods = sRefSet_newCopy (mods); | |
3083 | freshMods = TRUE; | |
3084 | ||
3085 | sRefSet_allElements (smods, el) | |
3086 | { | |
3087 | bool res = sRefSet_delete (mods, el); | |
3088 | ||
3089 | llassert (res); | |
3090 | } end_sRefSet_allElements; | |
3091 | ||
3092 | sRefSet_free (smods); | |
3093 | /*@-branchstate@*/ | |
3094 | } | |
3095 | /*@=branchstate@*/ | |
3096 | } | |
3097 | else if (sRefSet_isDefined (mods)) | |
3098 | { /* just check observers */ | |
3099 | setCodePoint (); | |
3100 | ||
3101 | sRefSet_allElements (mods, s) /* s is something which may be modified */ | |
3102 | { | |
3103 | sRef rb = sRef_getRootBase (s); | |
3104 | ||
3105 | setCodePoint (); | |
3106 | ||
3107 | if (sRef_isParam (rb)) | |
3108 | { | |
3109 | sRef b = sRef_fixBaseParam (s, args); | |
3110 | ||
3111 | if (sRef_isObserver (b)) | |
3112 | { | |
3113 | exprNode e = exprNodeList_nth (args, sRef_getParam (rb)); | |
3114 | ||
3115 | if (optgenerror | |
3116 | (FLG_MODOBSERVER, | |
3117 | message ("Function call may modify observer%q: %s", | |
3118 | sRef_unparsePreOpt (b), exprNode_unparse (e)), | |
3119 | exprNode_loc (e))) | |
3120 | { | |
3121 | sRef_showExpInfo (b); | |
3122 | } | |
3123 | } | |
3124 | } | |
3125 | } end_sRefSet_allElements; | |
3126 | } | |
3127 | else | |
3128 | { | |
3129 | if (!hasMods) /* no specified modifications */ | |
3130 | { | |
3131 | if (context_getFlag (FLG_MODOBSERVERUNCON)) | |
3132 | { | |
3133 | exprNodeList_elements (args, e) | |
3134 | { | |
3135 | if (exprNode_isDefined (e)) | |
3136 | { | |
3137 | sRef s = exprNode_getSref (e); | |
3138 | ||
3139 | if (sRef_isObserver (s) | |
3140 | && ctype_isMutable (sRef_getType (s))) | |
3141 | { | |
3142 | if (optgenerror | |
3143 | (FLG_MODOBSERVERUNCON, | |
3144 | message | |
3145 | ("Call to unconstrained function %s may modify observer%q: %s", | |
3146 | exprNode_unparse (f), | |
3147 | sRef_unparsePreOpt (s), exprNode_unparse (e)), | |
3148 | exprNode_loc (e))) | |
3149 | { | |
3150 | sRef_showExpInfo (s); | |
3151 | } | |
3152 | } | |
3153 | } | |
3154 | } end_exprNodeList_elements; | |
3155 | } | |
3156 | } | |
3157 | } | |
3158 | ||
3159 | checkAnyCall (f, fname, params, args, hasMods, mods, isSpec, specialArgs); | |
3160 | ||
3161 | ret->uses = sRefSet_union (ret->uses, f->uses); | |
3162 | ret->sets = sRefSet_union (ret->sets, f->sets); | |
3163 | ret->msets = sRefSet_union (ret->msets, f->msets); | |
3164 | ||
3165 | if (freshMods) | |
3166 | { | |
3167 | /* | |
3168 | ** Spurious errors reported, because splint can't tell | |
3169 | ** mods must be fresh if freshMods is true. | |
3170 | */ | |
3171 | ||
3172 | /*@i@*/ sRefSet_free (mods); | |
3173 | } | |
3174 | ||
3175 | setCodePoint (); | |
3176 | } | |
3177 | ||
3178 | void checkGlobUse (uentry glob, bool isCall, /*@notnull@*/ exprNode e) | |
3179 | { | |
3180 | if (uentry_isVar (glob)) | |
3181 | { | |
3182 | if (context_inFunctionLike ()) | |
3183 | { | |
3184 | sRef sr = uentry_getSref (glob); | |
3185 | ||
3186 | context_usedGlobal (sr); | |
3187 | ||
3188 | if (context_checkGlobUse (glob)) | |
3189 | { | |
3190 | if (!context_globAccess (sr)) | |
3191 | { | |
3192 | if (isCall) | |
3193 | { | |
3194 | voptgenerror | |
3195 | (FLG_GLOBALS, | |
3196 | message ("Called procedure %s may access %s %q", | |
3197 | exprNode_unparse (e), | |
3198 | sRef_unparseScope (sr), | |
3199 | uentry_getName (glob)), | |
3200 | e->loc); | |
3201 | } | |
3202 | else | |
3203 | { | |
3204 | voptgenerror | |
3205 | (FLG_GLOBALS, | |
3206 | message ("Undocumented use of %s %s", | |
3207 | sRef_unparseScope (sr), | |
3208 | exprNode_unparse (e)), | |
3209 | e->loc); | |
3210 | } | |
3211 | } | |
3212 | } | |
3213 | } | |
3214 | } | |
3215 | else | |
3216 | { | |
3217 | llbug (message ("Global not variable: %q", uentry_unparse (glob))); | |
3218 | } | |
3219 | } | |
3220 | ||
3221 | static void | |
3222 | reflectEnsuresClause (exprNode ret, uentry le, exprNode f, exprNodeList args) | |
3223 | { | |
3224 | DPRINTF (("Reflect ensures clause: %s(%s) / %s / %s", | |
3225 | exprNode_unparse (f), exprNodeList_unparse (args), | |
3226 | uentry_unparseFull (le), | |
3227 | stateClauseList_unparse (uentry_getStateClauseList (le)))); | |
3228 | ||
3229 | if (uentry_isValid (le) && uentry_isFunction (le)) | |
3230 | { | |
3231 | stateClauseList sclauses = uentry_getStateClauseList (le); | |
3232 | ||
3233 | if (stateClauseList_isDefined (sclauses)) | |
3234 | { | |
3235 | DPRINTF (("Reflect ensures: %s / %s / %s", | |
3236 | uentry_unparse (le), | |
3237 | exprNode_unparse (f), exprNodeList_unparse (args))); | |
3238 | ||
3239 | stateClauseList_elements (sclauses, cl) | |
3240 | { | |
3241 | if (stateClause_hasEnsures (cl)) | |
3242 | { | |
3243 | /* Same in usymtab.c:1904 */ | |
3244 | if (stateClause_setsMetaState (cl)) | |
3245 | { | |
3246 | qual q = stateClause_getMetaQual (cl); | |
3247 | annotationInfo ainfo = qual_getAnnotationInfo (q); | |
3248 | metaStateInfo minfo = annotationInfo_getState (ainfo); | |
3249 | cstring key = metaStateInfo_getName (minfo); | |
3250 | int mvalue = annotationInfo_getValue (ainfo); | |
3251 | ||
3252 | sRefSet osrs = sRefSet_undefined; | |
3253 | sRefSet srs; | |
3254 | ||
3255 | if (stateClause_isGlobal (cl)) | |
3256 | { | |
3257 | srs = sRefSet_single (usymtab_lookupGlobalMarker ()); | |
3258 | osrs = srs; | |
3259 | } | |
3260 | else | |
3261 | { | |
3262 | srs = stateClause_getRefs (cl); | |
3263 | } | |
3264 | ||
3265 | DPRINTF (("Reflect ensures clause: %s", stateClause_unparse (cl))); | |
3266 | ||
3267 | ||
3268 | DPRINTF (("Sets meta state! %s", stateClause_unparse (cl))); | |
3269 | ||
3270 | sRefSet_elements (srs, sel) | |
3271 | { | |
3272 | sRef s; | |
3273 | ||
3274 | if (sRef_isResult (sRef_getRootBase (sel))) | |
3275 | { | |
3276 | s = exprNode_getSref (ret); | |
3277 | } | |
3278 | else | |
3279 | { | |
3280 | s = sRef_fixBaseParam (sel, args); | |
3281 | } | |
3282 | ||
3283 | DPRINTF (("Reflecting state clause on: %s / %s", | |
3284 | sRef_unparse (sel), sRef_unparse (s))); | |
3285 | ||
3286 | sRef_setMetaStateValueComplete (s, key, mvalue, exprNode_loc (f)); | |
3287 | } end_sRefSet_elements; | |
3288 | ||
3289 | sRefSet_free (osrs); | |
3290 | } | |
3291 | else | |
3292 | { | |
3293 | sRefSet srs = stateClause_getRefs (cl); | |
3294 | sRefModVal modf = stateClause_getEnsuresFunction (cl); | |
3295 | int eparam = stateClause_getStateParameter (cl); | |
3296 | ||
3297 | DPRINTF (("Reflect after clause: %s / %s", | |
3298 | stateClause_unparse (cl), | |
3299 | sRefSet_unparse (srs))); | |
3300 | ||
3301 | sRefSet_elements (srs, sel) | |
3302 | { | |
3303 | sRef s; | |
3304 | ||
3305 | DPRINTF (("elements: %s", sRef_unparse (sel))); | |
3306 | DPRINTF (("elements: %s", sRef_unparseFull (sel))); | |
3307 | ||
3308 | if (sRef_isResult (sRef_getRootBase (sel))) | |
3309 | { | |
3310 | DPRINTF (("Fix base: %s / %s", | |
3311 | sRef_unparse (sel), sRef_unparse (exprNode_getSref (ret)))); | |
3312 | s = sRef_fixBase (sel, exprNode_getSref (ret)); | |
3313 | DPRINTF (("==> %s", sRef_unparseFull (s))); | |
3314 | } | |
3315 | else | |
3316 | { | |
3317 | s = sRef_fixBaseParam (sel, args); | |
3318 | } | |
3319 | ||
3320 | DPRINTF (("elements: %s", sRef_unparse (s))); | |
3321 | DPRINTF (("elements: %s", sRef_unparseFull (s))); | |
3322 | ||
3323 | DPRINTF (("Reflecting state clause on: %s / %s", | |
3324 | sRef_unparseFull (sel), sRef_unparseFull (s))); | |
3325 | ||
3326 | /* evans 2001-08-24 - added aliasSetCompleteParam */ | |
3327 | sRef_aliasSetCompleteParam (modf, s, eparam, exprNode_loc (f)); | |
3328 | ||
3329 | DPRINTF (("After reflecting state clause on: %s / %s", | |
3330 | sRef_unparseFull (sel), sRef_unparseFull (s))); | |
3331 | } end_sRefSet_elements; | |
3332 | } | |
3333 | } | |
3334 | } end_stateClauseList_elements ; | |
3335 | } | |
3336 | ||
3337 | DPRINTF (("Here: %s / %s", | |
3338 | uentry_unparseFull (le), | |
3339 | bool_unparse (uentry_hasMetaStateEnsures (le)))); | |
3340 | ||
3341 | if (uentry_hasMetaStateEnsures (le)) | |
3342 | { | |
3343 | fileloc loc = exprNode_loc (f); | |
3344 | ||
3345 | metaStateConstraintList mscl = uentry_getMetaStateEnsures (le); | |
3346 | ||
3347 | metaStateConstraintList_elements (mscl, msc) | |
3348 | { | |
3349 | metaStateSpecifier msspec = metaStateConstraint_getSpecifier (msc); | |
3350 | metaStateInfo msinfo = metaStateSpecifier_getMetaStateInfo (msspec); | |
3351 | metaStateExpression msexpr = metaStateConstraint_getExpression (msc); | |
3352 | cstring key = metaStateInfo_getName (msinfo); | |
3353 | sRef mlsr = metaStateSpecifier_getSref (msspec); | |
3354 | sRef s; | |
3355 | sRef lastref = sRef_undefined; | |
3356 | stateValue sval = stateValue_undefined; | |
3357 | ||
3358 | DPRINTF (("Meta state constraint for %s: %s", uentry_unparse (le), | |
3359 | metaStateConstraint_unparse (msc))); | |
3360 | DPRINTF (("Matches left: %s", sRef_unparseDebug (mlsr))); | |
3361 | ||
3362 | if (sRef_isResult (sRef_getRootBase (mlsr))) | |
3363 | { | |
3364 | s = exprNode_getSref (ret); | |
3365 | } | |
3366 | else | |
3367 | { | |
3368 | s = sRef_fixBaseParam (mlsr, args); | |
3369 | } | |
3370 | ||
3371 | DPRINTF (("Setting state: %s", sRef_unparseFull (s))); | |
3372 | ||
3373 | while (metaStateExpression_isDefined (msexpr)) | |
3374 | { | |
3375 | metaStateSpecifier ms = metaStateExpression_getSpecifier (msexpr); | |
3376 | metaStateInfo msi = metaStateSpecifier_getMetaStateInfo (ms); | |
3377 | sRef msr, fs; | |
3378 | ||
3379 | DPRINTF (("Check expression: %s", metaStateExpression_unparse (msexpr))); | |
3380 | ||
3381 | if (metaStateExpression_isMerge (msexpr)) | |
3382 | { | |
3383 | msexpr = metaStateExpression_getRest (msexpr); | |
3384 | } | |
3385 | else | |
3386 | { | |
3387 | msexpr = metaStateExpression_undefined; | |
3388 | } | |
3389 | ||
3390 | if (metaStateInfo_isDefined (msi)) | |
3391 | { | |
3392 | /* Must match lhs state */ | |
3393 | llassert (metaStateInfo_equal (msinfo, msi)); | |
3394 | } | |
3395 | ||
3396 | if (metaStateSpecifier_isElipsis (ms)) | |
3397 | { | |
3398 | /* | |
3399 | ** For elipsis, we need to merge all the relevant elipsis parameters | |
3400 | ** | |
3401 | */ | |
3402 | ||
3403 | uentryList params = uentry_getParams (le); | |
3404 | int paramno = uentryList_size (params) - 1; | |
3405 | ||
3406 | if (!uentry_isElipsisMarker (uentryList_getN (params, paramno))) | |
3407 | { | |
3408 | voptgenerror | |
3409 | (FLG_TYPE, | |
3410 | message ("Ensures clauses uses ... for function without ... in parameter list: %q", | |
3411 | uentry_getName (le)), | |
3412 | uentry_whereLast (le)); | |
3413 | /*@innerbreak@*/ break; | |
3414 | } | |
3415 | ||
3416 | while (paramno < exprNodeList_size (args)) | |
3417 | { | |
3418 | exprNode arg = exprNodeList_getN (args, paramno); | |
3419 | fs = exprNode_getSref (arg); | |
3420 | DPRINTF (("Merge arg: %s", exprNode_unparse (arg))); | |
3421 | ||
3422 | /* cut and pasted... gack*/ | |
3423 | if (stateValue_isDefined (sval)) | |
3424 | { | |
3425 | /* Use combination table to merge old state value with new one: */ | |
3426 | stateValue tval = sRef_getMetaStateValue (fs, key); | |
3427 | ||
3428 | if (stateValue_isDefined (tval)) | |
3429 | { | |
3430 | stateCombinationTable sctable = metaStateInfo_getMergeTable (msinfo); | |
3431 | cstring msg = cstring_undefined; | |
3432 | int nval = stateCombinationTable_lookup (sctable, | |
3433 | stateValue_getValue (sval), | |
3434 | stateValue_getValue (tval), | |
3435 | &msg); | |
3436 | DPRINTF (("Combining: %s + %s -> %d", | |
3437 | stateValue_unparseValue (sval, msinfo), | |
3438 | stateValue_unparseValue (tval, msinfo), | |
3439 | nval)); | |
3440 | ||
3441 | if (nval == stateValue_error) | |
3442 | { | |
3443 | if (optgenerror | |
3444 | (FLG_STATEMERGE, | |
3445 | message | |
3446 | ("Attributes merged in ensures clause in states that " | |
3447 | "cannot be combined (%q is %q, %q is %q)%q", | |
3448 | sRef_unparse (lastref), | |
3449 | stateValue_unparseValue (sval, msinfo), | |
3450 | sRef_unparse (fs), | |
3451 | stateValue_unparseValue (tval, msinfo), | |
3452 | cstring_isDefined (msg) ? | |
3453 | message (": %s", msg) : cstring_undefined), | |
3454 | exprNode_loc (f))) | |
3455 | { | |
3456 | sRef_showMetaStateInfo (fs, key); | |
3457 | } | |
3458 | } | |
3459 | ||
3460 | stateValue_updateValueLoc (sval, nval, fileloc_undefined); | |
3461 | loc = exprNode_loc (arg); | |
3462 | } | |
3463 | else | |
3464 | { | |
3465 | DPRINTF (("No value for: %s:%s", sRef_unparse (fs), key)); | |
3466 | } | |
3467 | } | |
3468 | else | |
3469 | { | |
3470 | sval = sRef_getMetaStateValue (fs, key); | |
3471 | } | |
3472 | ||
3473 | lastref = fs; | |
3474 | ||
3475 | if (stateValue_isError (sval)) | |
3476 | { | |
3477 | /*@innerbreak@*/ break; /* Don't merge any more values if here was an error */ | |
3478 | } | |
3479 | ||
3480 | ||
3481 | paramno++; | |
3482 | } | |
3483 | } | |
3484 | else | |
3485 | { | |
3486 | msr = metaStateSpecifier_getSref (ms); | |
3487 | ||
3488 | ||
3489 | llassert (sRef_isParam (sRef_getRootBase (msr))); | |
3490 | fs = sRef_fixBaseParam (msr, args); | |
3491 | ||
3492 | if (stateValue_isDefined (sval)) | |
3493 | { | |
3494 | /* Use combination table to merge old state value with new one: */ | |
3495 | stateValue tval = sRef_getMetaStateValue (fs, key); | |
3496 | ||
3497 | if (stateValue_isDefined (tval)) | |
3498 | { | |
3499 | stateCombinationTable sctable = metaStateInfo_getMergeTable (msinfo); | |
3500 | cstring msg = cstring_undefined; | |
3501 | int nval = stateCombinationTable_lookup (sctable, | |
3502 | stateValue_getValue (sval), | |
3503 | stateValue_getValue (tval), | |
3504 | &msg); | |
3505 | DPRINTF (("Combining: %s + %s -> %d", | |
3506 | stateValue_unparseValue (sval, msinfo), | |
3507 | stateValue_unparseValue (tval, msinfo), | |
3508 | nval)); | |
3509 | ||
3510 | if (nval == stateValue_error) | |
3511 | { | |
3512 | if (optgenerror | |
3513 | (FLG_STATEMERGE, | |
3514 | message | |
3515 | ("Attributes merged in ensures clause in states that " | |
3516 | "cannot be combined (%q is %q, %q is %q)%q", | |
3517 | sRef_unparse (lastref), | |
3518 | stateValue_unparseValue (sval, msinfo), | |
3519 | sRef_unparse (fs), | |
3520 | stateValue_unparseValue (tval, msinfo), | |
3521 | cstring_isDefined (msg) | |
3522 | ? message (": %s", msg) : cstring_undefined), | |
3523 | exprNode_loc (f))) | |
3524 | { | |
3525 | sRef_showMetaStateInfo (fs, key); | |
3526 | } | |
3527 | } | |
3528 | ||
3529 | stateValue_updateValueLoc (sval, nval, fileloc_undefined); | |
3530 | } | |
3531 | else | |
3532 | { | |
3533 | DPRINTF (("No value for: %s:%s", sRef_unparse (fs), key)); | |
3534 | } | |
3535 | } | |
3536 | else | |
3537 | { | |
3538 | sval = sRef_getMetaStateValue (fs, key); | |
3539 | } | |
3540 | ||
3541 | lastref = fs; | |
3542 | ||
3543 | if (stateValue_isError (sval)) | |
3544 | { | |
3545 | /*@innerbreak@*/ break; /* Don't merge any more values if here was an error */ | |
3546 | } | |
3547 | } | |
3548 | } | |
3549 | ||
3550 | DPRINTF (("Setting: %s:%s <- %s", sRef_unparse (s), key, stateValue_unparse (sval))); | |
3551 | ||
3552 | if (stateValue_isDefined (sval)) | |
3553 | { | |
3554 | sRef_setMetaStateValueComplete (s, key, stateValue_getValue (sval), loc); | |
3555 | } | |
3556 | else | |
3557 | { | |
3558 | DPRINTF (("Undefined state: %s", cstring_toCharsSafe (sRef_unparse (s)))); | |
3559 | } | |
3560 | } end_metaStateConstraintList_elements ; | |
3561 | ||
3562 | metaStateConstraintList_free (mscl); | |
3563 | } | |
3564 | } | |
3565 | } | |
3566 | ||
3567 | static void | |
3568 | checkRequiresClause (uentry le, exprNode f, exprNodeList args) | |
3569 | { | |
3570 | DPRINTF (("Check requires clause: %s(%s) / %s / %s", | |
3571 | exprNode_unparse (f), exprNodeList_unparse (args), | |
3572 | uentry_unparseFull (le), | |
3573 | stateClauseList_unparse (uentry_getStateClauseList (le)))); | |
3574 | ||
3575 | if (uentry_isValid (le) && uentry_isFunction (le)) | |
3576 | { | |
3577 | stateClauseList sclauses = uentry_getStateClauseList (le); | |
3578 | ||
3579 | if (stateClauseList_isDefined (sclauses)) | |
3580 | { | |
3581 | DPRINTF (("Check requires: %s / %s / %s", | |
3582 | uentry_unparse (le), | |
3583 | exprNode_unparse (f), exprNodeList_unparse (args))); | |
3584 | ||
3585 | stateClauseList_elements (sclauses, cl) | |
3586 | { | |
3587 | DPRINTF (("Check clause: %s / %s", | |
3588 | stateClause_unparse (cl), | |
3589 | bool_unparse (stateClause_hasRequires (cl)))); | |
3590 | ||
3591 | if (stateClause_hasRequires (cl)) | |
3592 | { | |
3593 | sRefSet osrs = sRefSet_undefined; | |
3594 | sRefSet srs; | |
3595 | ||
3596 | if (stateClause_isGlobal (cl)) | |
3597 | { | |
3598 | srs = sRefSet_single (usymtab_lookupGlobalMarker ()); | |
3599 | osrs = srs; | |
3600 | } | |
3601 | else | |
3602 | { | |
3603 | srs = stateClause_getRefs (cl); | |
3604 | } | |
3605 | ||
3606 | DPRINTF (("Refs: %s", sRefSet_unparse (srs))); | |
3607 | ||
3608 | if (stateClause_setsMetaState (cl)) | |
3609 | { | |
3610 | qual q = stateClause_getMetaQual (cl); | |
3611 | annotationInfo ainfo = qual_getAnnotationInfo (q); | |
3612 | metaStateInfo minfo = annotationInfo_getState (ainfo); | |
3613 | cstring key = metaStateInfo_getName (minfo); | |
3614 | int mvalue = annotationInfo_getValue (ainfo); | |
3615 | ||
3616 | DPRINTF (("Requires meta state! %s = %d", key, mvalue)); | |
3617 | ||
3618 | sRefSet_elements (srs, sel) | |
3619 | { | |
3620 | sRef s = sRef_fixBaseParam (sel, args); | |
3621 | ||
3622 | if (sRef_isResult (sRef_getRootBase (sel))) | |
3623 | { | |
3624 | BADBRANCH; | |
3625 | } | |
3626 | else | |
3627 | { | |
3628 | DPRINTF (("Checking state clause on: %s / %s / %s = %d", | |
3629 | sRef_unparseFull (sel), sRef_unparseFull (s), | |
3630 | key, mvalue)); | |
3631 | ||
3632 | if (!sRef_checkMetaStateValue (s, key, mvalue)) | |
3633 | { | |
3634 | DPRINTF (("HERE: %s", sRef_unparse (s))); | |
3635 | if (optgenerror | |
3636 | (FLG_STATETRANSFER, | |
3637 | message | |
3638 | ("Requires clause of called function %q not satisfied%q (state is %q): %q", | |
3639 | uentry_getName (le), | |
3640 | sRef_isGlobalMarker (s) | |
3641 | ? message ("") | |
3642 | : message (" by %q", sRef_unparse (s)), | |
3643 | stateValue_unparseValue (sRef_getMetaStateValue (s, key), | |
3644 | minfo), | |
3645 | stateClause_unparse (cl)), | |
3646 | exprNode_loc (f))) | |
3647 | { | |
3648 | sRef_showAliasInfo (s); | |
3649 | } | |
3650 | else | |
3651 | { | |
3652 | DPRINTF (("Error supressed!")); | |
3653 | DPRINTF (("Loc: %s", fileloc_unparse (exprNode_loc (f)))); | |
3654 | DPRINTF (("Context supress: %s", | |
3655 | bool_unparse (context_suppressFlagMsg (FLG_STATETRANSFER, exprNode_loc (f))))); | |
3656 | } | |
3657 | } | |
3658 | } | |
3659 | } end_sRefSet_elements; | |
3660 | } | |
3661 | else | |
3662 | { | |
3663 | sRefModVal modf = stateClause_getRequiresBodyFunction (cl); | |
3664 | int eparam = stateClause_getStateParameter (cl); | |
3665 | ||
3666 | DPRINTF (("Reflect after clause: %s / %s", | |
3667 | stateClause_unparse (cl), | |
3668 | sRefSet_unparse (srs))); | |
3669 | ||
3670 | sRefSet_elements (srs, sel) | |
3671 | { | |
3672 | sRef s; | |
3673 | ||
3674 | DPRINTF (("elements: %s", sRef_unparse (sel))); | |
3675 | DPRINTF (("elements: %s", sRef_unparseFull (sel))); | |
3676 | ||
3677 | s = sRef_fixBaseParam (sel, args); | |
3678 | ||
3679 | DPRINTF (("elements: %s", sRef_unparse (s))); | |
3680 | DPRINTF (("elements: %s", sRef_unparseFull (s))); | |
3681 | ||
3682 | if (sRef_isResult (sRef_getRootBase (sel))) | |
3683 | { | |
3684 | ; /*@i423 what do we do about results */ | |
3685 | } | |
3686 | else | |
3687 | { | |
3688 | DPRINTF (("Reflecting state clause on: %s / %s", | |
3689 | sRef_unparse (sel), sRef_unparse (s))); | |
3690 | ||
3691 | modf (s, eparam, exprNode_loc (f)); | |
3692 | } | |
3693 | } end_sRefSet_elements; | |
3694 | } | |
3695 | ||
3696 | sRefSet_free (osrs); | |
3697 | } | |
3698 | } end_stateClauseList_elements ; | |
3699 | } | |
3700 | } | |
3701 | } | |
3702 | ||
3703 | static /*@only@*/ exprNode | |
3704 | functionCallSafe (/*@only@*/ /*@notnull@*/ exprNode f, | |
3705 | ctype t, /*@keep@*/ exprNodeList args) | |
3706 | { | |
3707 | /* requires f is a non-error exprNode, with type function */ | |
3708 | cstring fname = exprNode_unparse (f); | |
3709 | uentry le = exprNode_getUentry (f); | |
3710 | exprNode ret = exprNode_createPartialCopy (f); | |
3711 | int special; | |
3712 | ||
3713 | setCodePoint (); | |
3714 | ||
3715 | DPRINTF (("Call: %s %s",exprNode_unparse (f), exprNodeList_unparse (args))); | |
3716 | ||
3717 | ret->typ = ctype_getReturnType (t); | |
3718 | ret->kind = XPR_CALL; | |
3719 | ||
3720 | ret->edata = exprData_makeCall (f, args); | |
3721 | ||
3722 | /* | |
3723 | ** Order of these steps is very important! | |
3724 | ** | |
3725 | ** Must check for argument dependencies before messing up uses and sets. | |
3726 | */ | |
3727 | ||
3728 | if (context_getFlag (FLG_EVALORDER)) | |
3729 | { | |
3730 | exprNodeList_elements (args, current) | |
3731 | { | |
3732 | if (exprNode_isDefined (current)) | |
3733 | { | |
3734 | exprNode_addUse (current, current->sref); | |
3735 | } | |
3736 | } end_exprNodeList_elements; | |
3737 | ||
3738 | if (context_maybeSet (FLG_EVALORDER) || context_maybeSet (FLG_EVALORDERUNCON)) | |
3739 | { | |
3740 | checkSequencing (f, args); | |
3741 | } | |
3742 | ||
3743 | exprNodeList_elements (args, current) | |
3744 | { | |
3745 | if (exprNode_isDefined (current) && sRef_isMeaningful (current->sref)) | |
3746 | { | |
3747 | exprNode_addUse (ret, sRef_makeDerived (current->sref)); | |
3748 | } | |
3749 | } end_exprNodeList_elements ; | |
3750 | } | |
3751 | ||
3752 | special = checkArgs (le, f, t, args, ret); | |
3753 | checkGlobMods (f, le, args, ret, special); | |
3754 | checkRequiresClause (le, f, args); | |
3755 | setCodePoint (); | |
3756 | ||
3757 | if (uentry_isValid (le) | |
3758 | && (uentry_isFunction (le) | |
3759 | || (uentry_isVariable (le) | |
3760 | && ctype_isFunction (uentry_getType (le))))) | |
3761 | { | |
3762 | exitkind exk = uentry_getExitCode (le); | |
3763 | ||
3764 | /* f->typ is already set to the return type */ | |
3765 | ||
3766 | DPRINTF (("Function: %s", uentry_unparseFull (le))); | |
3767 | ret->sref = uentry_returnedRef (le, args); | |
3768 | DPRINTF (("Returned: %s / %s", | |
3769 | uentry_unparseFull (le), | |
3770 | sRef_unparseFull (ret->sref))); | |
3771 | ||
3772 | if (uentry_isFunction (le) && exprNodeList_size (args) >= 1) | |
3773 | { | |
3774 | qual nullPred = uentry_nullPred (le); | |
3775 | ||
3776 | if (qual_isTrueNull (nullPred)) | |
3777 | { | |
3778 | exprNode arg = exprNodeList_head (args); | |
3779 | ||
3780 | if (exprNode_isDefined (arg)) | |
3781 | { | |
3782 | ret->guards = guardSet_addFalseGuard (ret->guards, arg->sref); | |
3783 | } | |
3784 | } | |
3785 | else if (qual_isFalseNull (nullPred)) | |
3786 | { | |
3787 | exprNode arg = exprNodeList_head (args); | |
3788 | ||
3789 | if (exprNode_isDefined (arg)) | |
3790 | { | |
3791 | ret->guards = guardSet_addTrueGuard (ret->guards, arg->sref); | |
3792 | } | |
3793 | } | |
3794 | else | |
3795 | { | |
3796 | llassert (qual_isUnknown (nullPred)); | |
3797 | } | |
3798 | } | |
3799 | ||
3800 | if (exitkind_isConditionalExit (exk)) | |
3801 | { | |
3802 | /* | |
3803 | ** True exit is: | |
3804 | ** if (arg0) then { exit! } else { ; } | |
3805 | ** False exit is: | |
3806 | ** if (arg0) then { ; } else { exit! } | |
3807 | */ | |
3808 | ||
3809 | exprNode firstArg; | |
3810 | ||
3811 | llassert (!exprNodeList_isEmpty (args)); | |
3812 | firstArg = exprNodeList_head (args); | |
3813 | ||
3814 | if (exprNode_isDefined (firstArg) | |
3815 | && !guardSet_isEmpty (firstArg->guards)) | |
3816 | { | |
3817 | usymtab_trueBranch (guardSet_undefined); | |
3818 | usymtab_altBranch (guardSet_undefined); | |
3819 | ||
3820 | if (exitkind_isTrueExit (exk)) | |
3821 | { | |
3822 | usymtab_popBranches (firstArg, | |
3823 | exprNode_makeMustExit (), | |
3824 | exprNode_undefined, | |
3825 | TRUE, TRUEEXITCLAUSE); | |
3826 | } | |
3827 | else | |
3828 | { | |
3829 | usymtab_popBranches (firstArg, | |
3830 | exprNode_undefined, | |
3831 | exprNode_makeMustExit (), | |
3832 | TRUE, FALSEEXITCLAUSE); | |
3833 | } | |
3834 | } | |
3835 | ||
3836 | ret->exitCode = XK_MAYEXIT; | |
3837 | } | |
3838 | else if (exitkind_mustExit (exk)) | |
3839 | { | |
3840 | ret->exitCode = XK_MUSTEXIT; | |
3841 | } | |
3842 | else if (exitkind_couldExit (exk)) | |
3843 | { | |
3844 | ret->exitCode = XK_MAYEXIT; | |
3845 | } | |
3846 | else | |
3847 | { | |
3848 | ; | |
3849 | } | |
3850 | ||
3851 | if (cstring_equalLit (fname, "exit")) | |
3852 | { | |
3853 | if (exprNodeList_size (args) == 1) | |
3854 | { | |
3855 | exprNode arg = exprNodeList_head (args); | |
3856 | ||
3857 | if (exprNode_isDefined (arg) && exprNode_knownIntValue (arg)) | |
3858 | { | |
3859 | long int val = multiVal_forceInt (exprNode_getValue (arg)); | |
3860 | ||
3861 | if (val != 0) | |
3862 | { | |
3863 | voptgenerror | |
3864 | (FLG_EXITARG, | |
3865 | message | |
3866 | ("Argument to exit has implementation defined behavior: %s", | |
3867 | exprNode_unparse (arg)), | |
3868 | exprNode_loc (arg)); | |
3869 | } | |
3870 | } | |
3871 | } | |
3872 | } | |
3873 | } | |
3874 | else | |
3875 | { | |
3876 | ret->sref = defref; | |
3877 | exprNode_checkSetAny (ret, uentry_rawName (le)); | |
3878 | } | |
3879 | ||
3880 | DPRINTF (("Before reflect: %s", sRef_unparseFull (ret->sref))); | |
3881 | DPRINTF (("Reflect: %s", uentry_unparseFull (le))); | |
3882 | reflectEnsuresClause (ret, le, f, args); | |
3883 | setCodePoint (); | |
3884 | ||
3885 | return (ret); | |
3886 | } | |
3887 | ||
3888 | /* | |
3889 | ** this is yucky! should keep the uentry as part of exprNode! | |
3890 | */ | |
3891 | ||
3892 | uentry exprNode_getUentry (exprNode e) | |
3893 | { | |
3894 | if (exprNode_isError (e)) | |
3895 | { | |
3896 | return uentry_undefined; | |
3897 | } | |
3898 | else | |
3899 | { | |
3900 | cstring s = exprNode_rootVarName (e); | |
3901 | uentry ue = usymtab_lookupSafe (s); | |
3902 | ||
3903 | return ue; | |
3904 | } | |
3905 | } | |
3906 | ||
3907 | /* | |
3908 | ** Returns true iff e1 and e2 are both exactly the same storage | |
3909 | ** (conservative). | |
3910 | */ | |
3911 | ||
3912 | static bool exprNode_sameStorage (exprNode e1, exprNode e2) | |
3913 | { | |
3914 | sRef s1 = exprNode_getSref (e1); | |
3915 | sRef s2 = exprNode_getSref (e2); | |
3916 | ||
3917 | return (sRef_realSame (s1, s2)); | |
3918 | } | |
3919 | ||
3920 | exprNode | |
3921 | exprNode_makeInitBlock (lltok brace, /*@only@*/ exprNodeList inits) | |
3922 | { | |
3923 | exprNode ret = exprNode_createPlain (ctype_unknown); | |
3924 | ||
3925 | ret->kind = XPR_INITBLOCK; | |
3926 | ret->edata = exprData_makeCall (exprNode_undefined, inits); | |
3927 | ret->loc = fileloc_update (ret->loc, lltok_getLoc (brace)); | |
3928 | ||
3929 | return (ret); | |
3930 | } | |
3931 | ||
3932 | exprNode | |
3933 | exprNode_functionCall (/*@only@*/ exprNode f, /*@only@*/ exprNodeList args) | |
3934 | { | |
3935 | ctype t; | |
3936 | ||
3937 | setCodePoint (); | |
3938 | ||
3939 | if (exprNode_isUndefined (f)) | |
3940 | { | |
3941 | exprNode_free (f); | |
3942 | exprNodeList_free (args); | |
3943 | return exprNode_undefined; | |
3944 | } | |
3945 | ||
3946 | t = exprNode_getType (f); | |
3947 | ||
3948 | if (sRef_isLocalVar (f->sref)) | |
3949 | { | |
3950 | exprNode_checkUse (f, f->sref, f->loc); | |
3951 | ||
3952 | if (sRef_possiblyNull (f->sref)) | |
3953 | { | |
3954 | if (!usymtab_isGuarded (f->sref)) | |
3955 | { | |
3956 | if (optgenerror (FLG_NULLDEREF, | |
3957 | message ("Function call using %s pointer %q", | |
3958 | sRef_nullMessage (f->sref), | |
3959 | sRef_unparse (f->sref)), | |
3960 | f->loc)) | |
3961 | { | |
3962 | sRef_showNullInfo (f->sref); | |
3963 | sRef_setNullError (f->sref); | |
3964 | } | |
3965 | } | |
3966 | } | |
3967 | } | |
3968 | ||
3969 | setCodePoint (); | |
3970 | ||
3971 | if (ctype_isRealFunction (t)) | |
3972 | { | |
3973 | exprNode ret = functionCallSafe (f, t, args); | |
3974 | setCodePoint (); | |
3975 | return ret; | |
3976 | } | |
3977 | else if (ctype_isUnknown (t)) | |
3978 | { | |
3979 | exprNode ret = exprNode_createPartialCopy (f); | |
3980 | cstring tstring; | |
3981 | ||
3982 | setCodePoint (); | |
3983 | ||
3984 | ret->typ = t; | |
3985 | exprNodeList_elements (args, current) | |
3986 | { | |
3987 | if (exprNode_isDefined (current)) | |
3988 | { | |
3989 | exprNode_checkUse (ret, current->sref, ret->loc); | |
3990 | ||
3991 | /* | |
3992 | ** also, anything derivable from current->sref may be used | |
3993 | */ | |
3994 | ||
3995 | exprNode_addUse (ret, sRef_makeDerived (current->sref)); | |
3996 | exprNode_mergeUSs (ret, current); | |
3997 | } | |
3998 | } end_exprNodeList_elements; | |
3999 | ||
4000 | ret->edata = exprData_makeCall (f, args); | |
4001 | ret->kind = XPR_CALL; | |
4002 | ||
4003 | tstring = cstring_copy (exprNode_unparse (f)); | |
4004 | ||
4005 | cstring_markOwned (tstring); | |
4006 | exprNode_checkSetAny (ret, tstring); | |
4007 | ||
4008 | return (ret); | |
4009 | } | |
4010 | else | |
4011 | { | |
4012 | voptgenerror (FLG_TYPE, | |
4013 | message ("Call to non-function (type %t): %s", t, | |
4014 | exprNode_unparse (f)), | |
4015 | f->loc); | |
4016 | exprNode_free (f); | |
4017 | exprNodeList_free (args); | |
4018 | ||
4019 | return (exprNode_makeError ()); | |
4020 | } | |
4021 | } | |
4022 | ||
4023 | static exprNode | |
4024 | exprNode_fieldAccessAux (/*@only@*/ exprNode s, /*@observer@*/ fileloc loc, | |
4025 | /*@only@*/ cstring f) | |
4026 | { | |
4027 | exprNode ret = exprNode_createPartialCopy (s); | |
4028 | ||
4029 | ret->kind = XPR_FACCESS; | |
4030 | ||
4031 | if (exprNode_isError (s)) | |
4032 | { | |
4033 | ret->edata = exprData_makeField (s, f); | |
4034 | return ret; | |
4035 | } | |
4036 | else | |
4037 | { | |
4038 | ctype t = exprNode_getType (s); | |
4039 | ctype tr = ctype_realType (t); | |
4040 | ||
4041 | checkMacroParen (s); | |
4042 | ||
4043 | ret->edata = exprData_makeField (s, f); | |
4044 | ||
4045 | if (ctype_isStructorUnion (tr)) | |
4046 | { | |
4047 | uentry tf = uentryList_lookupField (ctype_getFields (tr), f); | |
4048 | ||
4049 | if (uentry_isUndefined (tf)) | |
4050 | { | |
4051 | voptgenerror (FLG_TYPE, | |
4052 | message ("Access non-existent field %s of %t: %s", f, t, | |
4053 | exprNode_unparse (ret)), | |
4054 | loc); | |
4055 | /*! cstring_free (f); */ /* evans 2001-03-25 self-detect */ | |
4056 | return (ret); | |
4057 | } | |
4058 | else | |
4059 | { | |
4060 | uentry_setUsed (tf, exprNode_loc (ret)); | |
4061 | ||
4062 | ret->typ = uentry_getType (tf); | |
4063 | checkSafeUse (ret, s->sref); | |
4064 | ||
4065 | ret->sref = sRef_makeField (s->sref, uentry_rawName (tf)); | |
4066 | /*!? exprNode_free (s); */ /* evans 2001-03-25 self-detect */ | |
4067 | return (ret); | |
4068 | } | |
4069 | } | |
4070 | else /* isStructorUnion */ | |
4071 | { | |
4072 | if (ctype_isRealAbstract (tr)) | |
4073 | { | |
4074 | voptgenerror | |
4075 | (FLG_ABSTRACT, | |
4076 | message ("Access field of abstract type (%t): %s.%s", | |
4077 | t, exprNode_unparse (s), f), | |
4078 | loc); | |
4079 | ret->typ = ctype_unknown; | |
4080 | } | |
4081 | else | |
4082 | { | |
4083 | if (ctype_isKnown (tr)) | |
4084 | { | |
4085 | voptgenerror | |
4086 | (FLG_TYPE, | |
4087 | message | |
4088 | ("Access field of non-struct or union (%t): %s.%s", | |
4089 | t, exprNode_unparse (s), f), | |
4090 | loc); | |
4091 | ||
4092 | ret->typ = ctype_unknown; | |
4093 | } | |
4094 | else | |
4095 | { | |
4096 | cstring sn = cstring_copy (f); | |
4097 | ||
4098 | checkSafeUse (ret, s->sref); | |
4099 | cstring_markOwned (sn); | |
4100 | ret->sref = sRef_makeField (s->sref, sn); | |
4101 | return (ret); | |
4102 | } | |
4103 | } | |
4104 | ||
4105 | return (ret); | |
4106 | } | |
4107 | } | |
4108 | BADEXIT; | |
4109 | } | |
4110 | ||
4111 | exprNode | |
4112 | exprNode_fieldAccess (/*@only@*/ exprNode s, /*@only@*/ lltok dot, | |
4113 | /*@only@*/ cstring f) | |
4114 | { | |
4115 | exprNode res = exprNode_fieldAccessAux (s, lltok_getLoc (dot), f); | |
4116 | lltok_release (dot); | |
4117 | return res; | |
4118 | } | |
4119 | ||
4120 | exprNode | |
4121 | exprNode_addParens (/*@only@*/ lltok lpar, /*@only@*/ exprNode e) | |
4122 | { | |
4123 | exprNode ret = exprNode_createPartialCopy (e); | |
4124 | ||
4125 | ret->loc = fileloc_update (ret->loc, lltok_getLoc (lpar)); | |
4126 | ret->kind = XPR_PARENS; | |
4127 | ret->edata = exprData_makeUop (e, lpar); | |
4128 | ||
4129 | if (!exprNode_isError (e)) | |
4130 | { | |
4131 | ret->exitCode = e->exitCode; | |
4132 | ret->canBreak = e->canBreak; | |
4133 | ret->mustBreak = e->mustBreak; | |
4134 | ret->isJumpPoint = e->isJumpPoint; | |
4135 | ret->sref = e->sref; | |
4136 | } | |
4137 | ||
4138 | return ret; | |
4139 | } | |
4140 | ||
4141 | static exprNode | |
4142 | exprNode_arrowAccessAux (/*@only@*/ exprNode s, /*@observer@*/ fileloc loc, | |
4143 | /*@only@*/ cstring f) | |
4144 | { | |
4145 | exprNode ret = exprNode_createPartialCopy (s); | |
4146 | ||
4147 | ret->edata = exprData_makeField (s, f); | |
4148 | ret->kind = XPR_ARROW; | |
4149 | ||
4150 | if (exprNode_isError (s)) | |
4151 | { | |
4152 | return (ret); | |
4153 | } | |
4154 | else | |
4155 | { | |
4156 | ctype t = exprNode_getType (s); | |
4157 | ctype tr = ctype_realType (t); | |
4158 | ||
4159 | checkMacroParen (s); | |
4160 | ||
4161 | (void) ctype_fixArrayPtr (tr); /* REWRITE THIS */ | |
4162 | ||
4163 | if (ctype_isRealPointer (tr)) | |
4164 | { | |
4165 | ctype b = ctype_realType (ctype_baseArrayPtr (tr)); | |
4166 | ||
4167 | if (ctype_isStructorUnion (b)) | |
4168 | { | |
4169 | uentry fentry = uentryList_lookupField (ctype_getFields (b), f); | |
4170 | ||
4171 | if (sRef_isKnown (s->sref) && sRef_possiblyNull (s->sref)) | |
4172 | { | |
4173 | if (!usymtab_isGuarded (s->sref) && !context_inProtectVars ()) | |
4174 | { | |
4175 | if (optgenerror | |
4176 | (FLG_NULLDEREF, | |
4177 | message ("Arrow access from %s pointer%q: %s", | |
4178 | sRef_nullMessage (s->sref), | |
4179 | sRef_unparsePreOpt (s->sref), | |
4180 | exprNode_unparse (ret)), | |
4181 | loc)) | |
4182 | { | |
4183 | sRef_showNullInfo (s->sref); | |
4184 | sRef_setNullError (s->sref); | |
4185 | } | |
4186 | } | |
4187 | } | |
4188 | ||
4189 | if (uentry_isUndefined (fentry)) | |
4190 | { | |
4191 | voptgenerror | |
4192 | (FLG_TYPE, | |
4193 | message ("Access non-existent field %s of %t: %s", | |
4194 | f, t, exprNode_unparse (ret)), | |
4195 | loc); | |
4196 | ret->typ = ctype_unknown; | |
4197 | return (ret); | |
4198 | } | |
4199 | else | |
4200 | { | |
4201 | /* | |
4202 | ** was safeUse: shouldn't be safe! | |
4203 | ** | |
4204 | ** to do rec->field | |
4205 | ** rec must be defined, | |
4206 | ** *rec must be allocated | |
4207 | ** rec->field need only be defined it if is an rvalue | |
4208 | */ | |
4209 | ||
4210 | uentry_setUsed (fentry, exprNode_loc (ret)); | |
4211 | ret->typ = uentry_getType (fentry); | |
4212 | ||
4213 | exprNode_checkUse (ret, s->sref, s->loc); | |
4214 | ||
4215 | /* exprNode_checkUse (ret, sRef_makePointer (s->sref), s->loc); */ | |
4216 | ret->sref = sRef_makeArrow (s->sref, uentry_rawName (fentry)); | |
4217 | return (ret); | |
4218 | } | |
4219 | } | |
4220 | else /* Pointer to something that is not a struct or union*/ | |
4221 | { | |
4222 | if (ctype_isRealAbstract (tr)) | |
4223 | { | |
4224 | ctype xrt = ctype_forceRealType (tr); | |
4225 | ||
4226 | voptgenerror | |
4227 | (FLG_ABSTRACT, | |
4228 | message ("Arrow access field of abstract type (%t): %s->%s", | |
4229 | t, exprNode_unparse (s), f), | |
4230 | loc); | |
4231 | ||
4232 | /* | |
4233 | ** Set the state correctly, as if the abstraction is broken. | |
4234 | */ | |
4235 | ||
4236 | if (ctype_isRealPointer (xrt) && | |
4237 | (b = ctype_realType (ctype_baseArrayPtr (xrt)), | |
4238 | ctype_isStructorUnion (b))) | |
4239 | { | |
4240 | uentry fentry = uentryList_lookupField (ctype_getFields (b), f); | |
4241 | ret->typ = uentry_getType (fentry); | |
4242 | ret->sref = sRef_makeArrow (s->sref, uentry_rawName (fentry)); | |
4243 | } | |
4244 | else | |
4245 | { | |
4246 | ret->typ = ctype_unknown; | |
4247 | ret->sref = sRef_undefined; | |
4248 | } | |
4249 | } | |
4250 | else /* not a struct, union or abstract */ | |
4251 | { | |
4252 | if (ctype_isUnknown (tr)) { | |
4253 | cstring sn = cstring_copy (f); | |
4254 | ||
4255 | DPRINTF (("Here: %s", exprNode_unparse (s))); | |
4256 | ||
4257 | exprNode_checkUse (ret, s->sref, s->loc); | |
4258 | exprNode_checkUse (ret, sRef_makePointer (s->sref), s->loc); | |
4259 | ||
4260 | cstring_markOwned (sn); | |
4261 | ret->sref = sRef_makeArrow (s->sref, sn); | |
4262 | ||
4263 | ret->kind = XPR_ARROW; | |
4264 | return (ret); | |
4265 | } else { | |
4266 | voptgenerror | |
4267 | (FLG_TYPE, | |
4268 | message ("Arrow access field of non-struct or union " | |
4269 | "pointer (%t): %s->%s", | |
4270 | t, exprNode_unparse (s), f), | |
4271 | loc); | |
4272 | ||
4273 | ret->typ = ctype_unknown; | |
4274 | ret->sref = sRef_undefined; | |
4275 | } | |
4276 | } | |
4277 | } | |
4278 | } | |
4279 | else /* its not a pointer */ | |
4280 | { | |
4281 | if (!ctype_isUnknown (tr)) | |
4282 | { | |
4283 | voptgenerror | |
4284 | (FLG_TYPE, | |
4285 | message ("Arrow access of non-pointer (%t): %s->%s", | |
4286 | t, exprNode_unparse (s), f), | |
4287 | loc); | |
4288 | ||
4289 | ret->typ = ctype_unknown; | |
4290 | ret->sref = sRef_undefined; | |
4291 | } | |
4292 | else | |
4293 | { | |
4294 | cstring sn = cstring_copy (f); | |
4295 | ||
4296 | DPRINTF (("Here: %s", exprNode_unparse (s))); | |
4297 | ||
4298 | exprNode_checkUse (ret, s->sref, s->loc); | |
4299 | exprNode_checkUse (ret, sRef_makePointer (s->sref), s->loc); | |
4300 | ||
4301 | cstring_markOwned (sn); | |
4302 | ret->sref = sRef_makeArrow (s->sref, sn); | |
4303 | ||
4304 | ret->kind = XPR_ARROW; | |
4305 | return (ret); | |
4306 | } | |
4307 | } | |
4308 | ||
4309 | return (ret); | |
4310 | } | |
4311 | BADEXIT; | |
4312 | } | |
4313 | ||
4314 | exprNode | |
4315 | exprNode_arrowAccess (/*@only@*/ exprNode s, | |
4316 | /*@only@*/ lltok arrow, | |
4317 | /*@only@*/ cstring f) | |
4318 | { | |
4319 | exprNode res = exprNode_arrowAccessAux (s, lltok_getLoc (arrow), f); | |
4320 | lltok_release (arrow); | |
4321 | return res; | |
4322 | } | |
4323 | ||
4324 | /* | |
4325 | ** only postOp's in C: i++ and i-- | |
4326 | */ | |
4327 | ||
4328 | exprNode | |
4329 | exprNode_postOp (/*@only@*/ exprNode e, /*@only@*/ lltok op) | |
4330 | { | |
4331 | /* check modification also */ | |
4332 | /* cstring opname = lltok_unparse (op);*/ | |
4333 | ctype t; | |
4334 | exprNode ret = exprNode_createPartialCopy (e); | |
4335 | ||
4336 | ret->loc = fileloc_update (ret->loc, lltok_getLoc (op)); | |
4337 | ret->kind = XPR_POSTOP; | |
4338 | ret->edata = exprData_makeUop (e, op); | |
4339 | ||
4340 | if (!exprNode_isDefined (e)) | |
4341 | { | |
4342 | return ret; | |
4343 | } | |
4344 | ||
4345 | checkMacroParen (e); | |
4346 | ||
4347 | exprNode_checkUse (ret, e->sref, e->loc); | |
4348 | exprNode_checkSet (ret, e->sref); | |
4349 | ||
4350 | t = exprNode_getType (e); | |
4351 | ||
4352 | if (sRef_isUnsafe (e->sref)) | |
4353 | { | |
4354 | voptgenerror (FLG_MACROPARAMS, | |
4355 | message ("Operand of %s is macro parameter (non-functional): %s%s", | |
4356 | lltok_unparse (op), exprNode_unparse (e), lltok_unparse (op)), | |
4357 | e->loc); | |
4358 | sRef_makeSafe (e->sref); | |
4359 | sRef_makeSafe (ret->sref); | |
4360 | } | |
4361 | ||
4362 | if (ctype_isForceRealNumeric (&t) || ctype_isRealAP (t)) | |
4363 | { | |
4364 | ret->typ = e->typ; | |
4365 | } | |
4366 | else | |
4367 | { | |
4368 | if (ctype_isRealAbstract (t)) | |
4369 | { | |
4370 | voptgenerror | |
4371 | (FLG_ABSTRACT, | |
4372 | message ("Operand of %s is abstract type (%t): %s", | |
4373 | lltok_unparse (op), t, exprNode_unparse (e)), | |
4374 | e->loc); | |
4375 | } | |
4376 | else | |
4377 | { | |
4378 | voptgenerror | |
4379 | (FLG_TYPE, | |
4380 | message ("Operand of %s is non-numeric (%t): %s", | |
4381 | lltok_unparse (op), t, exprNode_unparse (e)), | |
4382 | e->loc); | |
4383 | } | |
4384 | ret->typ = ctype_unknown; | |
4385 | } | |
4386 | ||
4387 | /* if (ctype_isZero (t)) e->typ = ctype_int; */ | |
4388 | ||
4389 | exprNode_checkModify (e, ret); | |
4390 | ||
4391 | /* added 7/11/2000 D.L */ | |
4392 | /*@i223*/ | |
4393 | /*DRL 6/8/01 I decided to disable all Splint warnings here since the code | |
4394 | probably needs a rewrite any way */ | |
4395 | ||
4396 | /*@i65234@*/ | |
4397 | /*@ignore@*/ | |
4398 | ||
4399 | /* updateEnvironmentForPostOp (e); */ | |
4400 | ||
4401 | /* start modifications */ | |
4402 | /* added by Seejo on 4/16/2000 */ | |
4403 | ||
4404 | /* Arithmetic operations on pointers wil modify the size/len/null terminated | |
4405 | status */ | |
4406 | if ((sRef_isPossiblyNullTerminated (e->sref)) || (sRef_isNullTerminated(e->sref))) { | |
4407 | ||
4408 | ret->sref = sRef_copy (e->sref); | |
4409 | ||
4410 | /* Operator : ++ */ | |
4411 | if (lltok_getTok (op) == INC_OP) { | |
4412 | if (sRef_getSize(e->sref) > 0) { | |
4413 | ||
4414 | sRef_setSize (ret->sref, sRef_getSize(e->sref) - 1); | |
4415 | ||
4416 | if (sRef_getLen(e->sref) == 1) { /* i.e. the first character is \0 */ | |
4417 | /* Assumption: there is only 1 \0 in the buffer */ | |
4418 | /* This will not be correct if there are 2 \0's in the buffer */ | |
4419 | sRef_setNotNullTerminatedState(ret->sref); | |
4420 | sRef_resetLen(ret->sref); | |
4421 | } else { | |
4422 | sRef_setNullTerminatedState(ret->sref); | |
4423 | sRef_setLen (ret->sref, sRef_getLen(e->sref) - 1); | |
4424 | } | |
4425 | if (sRef_isNullTerminated (ret->sref)) | |
4426 | printf ("ret->sref is Null Terminated\n"); | |
4427 | else if (sRef_isPossiblyNullTerminated (ret->sref)) | |
4428 | printf ("ret->sref is Possibly Null Terminated\n"); | |
4429 | else if (sRef_isNotNullTerminated (ret->sref)) | |
4430 | printf ("ret->sref is Not Null Terminated\n"); | |
4431 | } | |
4432 | } | |
4433 | ||
4434 | /* Operator : -- */ | |
4435 | if (lltok_getTok (op) == DEC_OP) { | |
4436 | if (sRef_getSize(e->sref) >= 0) { | |
4437 | sRef_setSize (ret->sref, sRef_getSize(e->sref) + 1); | |
4438 | sRef_setLen (ret->sref, sRef_getLen(e->sref) + 1); | |
4439 | } | |
4440 | } | |
4441 | } | |
4442 | /*@end@*/ | |
4443 | /* end modifications */ | |
4444 | ||
4445 | return ret; | |
4446 | } | |
4447 | ||
4448 | exprNode | |
4449 | exprNode_preOp (/*@only@*/ exprNode e, /*@only@*/ lltok op) | |
4450 | { | |
4451 | bool checkMod = FALSE; | |
4452 | ctype te, tr; | |
4453 | int opid = lltok_getTok (op); | |
4454 | exprNode ret = exprNode_createSemiCopy (e); | |
4455 | ||
4456 | exprNode_copySets (ret, e); | |
4457 | ||
4458 | multiVal_free (ret->val); | |
4459 | ret->val = multiVal_undefined; | |
4460 | ret->loc = fileloc_update (ret->loc, lltok_getLoc (op)); | |
4461 | ret->kind = XPR_PREOP; | |
4462 | ret->edata = exprData_makeUop (e, op); | |
4463 | ||
4464 | if (exprNode_isError (e)) | |
4465 | { | |
4466 | return ret; | |
4467 | } | |
4468 | ||
4469 | checkMacroParen (e); | |
4470 | ||
4471 | te = exprNode_getType (e); | |
4472 | tr = ctype_realType (te); | |
4473 | ||
4474 | if (opid != TAMPERSAND) | |
4475 | { | |
4476 | exprNode_checkUse (ret, e->sref, e->loc); | |
4477 | ||
4478 | if (ctype_isRealAbstract (tr) | |
4479 | && (!(ctype_isRealBool (te) && (opid == TEXCL)))) | |
4480 | { | |
4481 | if (optgenerror (FLG_ABSTRACT, | |
4482 | message ("Operand of %s is abstract type (%t): %s", | |
4483 | lltok_unparse (op), tr, | |
4484 | exprNode_unparse (ret)), | |
4485 | e->loc)) | |
4486 | { | |
4487 | tr = te = ctype_unknown; | |
4488 | ret->typ = ctype_unknown; | |
4489 | sRef_setNullError (e->sref); | |
4490 | } | |
4491 | } | |
4492 | } | |
4493 | ||
4494 | switch (opid) | |
4495 | { | |
4496 | case INC_OP: | |
4497 | case DEC_OP: /* should also check modification! */ | |
4498 | if (sRef_isMacroParamRef (e->sref)) | |
4499 | { | |
4500 | voptgenerror | |
4501 | (FLG_MACROPARAMS, | |
4502 | message ("Operand of %s is macro parameter (non-functional): %s", | |
4503 | lltok_unparse (op), exprNode_unparse (ret)), | |
4504 | e->loc); | |
4505 | } | |
4506 | else | |
4507 | { | |
4508 | exprNode_checkSet (ret, e->sref); | |
4509 | } | |
4510 | ||
4511 | if (ctype_isForceRealNumeric (&tr) || ctype_isRealAP (tr)) | |
4512 | { | |
4513 | } | |
4514 | else | |
4515 | { | |
4516 | if (context_msgStrictOps ()) | |
4517 | { | |
4518 | voptgenerror | |
4519 | (FLG_STRICTOPS, | |
4520 | message ("Operand of %s is non-numeric (%t): %s", | |
4521 | lltok_unparse (op), te, exprNode_unparse (ret)), | |
4522 | e->loc); | |
4523 | } | |
4524 | ret->typ = ctype_int; | |
4525 | } | |
4526 | ||
4527 | /* start modifications */ | |
4528 | /* added by Seejo on 4/16/2000 */ | |
4529 | ||
4530 | /* Arithmetic operations on pointers wil modify the size/len/null terminated | |
4531 | status */ | |
4532 | if ((sRef_isPossiblyNullTerminated (e->sref)) || (sRef_isNullTerminated(e->sref))) { | |
4533 | ||
4534 | ret->sref = sRef_copy (e->sref); | |
4535 | ||
4536 | /* Operator : ++ */ | |
4537 | if (lltok_getTok (op) == INC_OP) { | |
4538 | if (sRef_getSize(e->sref) > 0) { | |
4539 | ||
4540 | sRef_setSize (ret->sref, sRef_getSize(e->sref) - 1); | |
4541 | ||
4542 | if (sRef_getLen(e->sref) == 1) { /* i.e. the first character is \0 */ | |
4543 | /* Assumption: there is only 1 \0 in the buffer */ | |
4544 | /* This will not be correct if there are 2 \0's in the buffer */ | |
4545 | sRef_setNotNullTerminatedState(ret->sref); | |
4546 | sRef_resetLen (ret->sref); | |
4547 | } else { | |
4548 | sRef_setNullTerminatedState(ret->sref); | |
4549 | sRef_setLen (ret->sref, sRef_getLen(e->sref) - 1); | |
4550 | } | |
4551 | } | |
4552 | } | |
4553 | ||
4554 | /* Operator : -- */ | |
4555 | if (lltok_getTok (op) == DEC_OP) { | |
4556 | if (sRef_getSize(e->sref) >= 0) { | |
4557 | sRef_setSize (ret->sref, sRef_getSize(e->sref) + 1); | |
4558 | sRef_setLen (ret->sref, sRef_getLen(e->sref) + 1); | |
4559 | } | |
4560 | } | |
4561 | } | |
4562 | ||
4563 | /* end modifications */ | |
4564 | ||
4565 | checkMod = TRUE; | |
4566 | break; | |
4567 | ||
4568 | case TMINUS: | |
4569 | case TPLUS: | |
4570 | if (ctype_isForceRealNumeric (&tr)) | |
4571 | { | |
4572 | if (opid == TMINUS) | |
4573 | { | |
4574 | ret->val = multiVal_invert (exprNode_getValue (e)); | |
4575 | } | |
4576 | else | |
4577 | { | |
4578 | ret->val = multiVal_copy (exprNode_getValue (e)); | |
4579 | } | |
4580 | } | |
4581 | else | |
4582 | { | |
4583 | if (context_msgStrictOps ()) | |
4584 | { | |
4585 | voptgenerror | |
4586 | (FLG_STRICTOPS, | |
4587 | message ("Operand of %s is non-numeric (%t): %s", | |
4588 | lltok_unparse (op), te, exprNode_unparse (ret)), | |
4589 | e->loc); | |
4590 | } | |
4591 | ||
4592 | ret->typ = ctype_int; | |
4593 | } | |
4594 | break; | |
4595 | ||
4596 | case TEXCL: /* maybe this should be restricted */ | |
4597 | guardSet_flip (ret->guards); | |
4598 | ||
4599 | if (ctype_isRealBool (te) || ctype_isUnknown (te)) | |
4600 | { | |
4601 | ; | |
4602 | } | |
4603 | else | |
4604 | { | |
4605 | if (ctype_isRealPointer (tr)) | |
4606 | { | |
4607 | if (sRef_isKnown (e->sref)) | |
4608 | { | |
4609 | ret->guards = guardSet_addFalseGuard (ret->guards, e->sref); | |
4610 | } | |
4611 | ||
4612 | voptgenerror2n | |
4613 | (FLG_BOOLOPS, FLG_PTRNEGATE, | |
4614 | message ("Operand of %s is non-boolean (%t): %s", | |
4615 | lltok_unparse (op), te, exprNode_unparse (ret)), | |
4616 | e->loc); | |
4617 | } | |
4618 | else | |
4619 | { | |
4620 | voptgenerror | |
4621 | (FLG_BOOLOPS, | |
4622 | message ("Operand of %s is non-boolean (%t): %s", | |
4623 | lltok_unparse (op), te, exprNode_unparse (ret)), | |
4624 | e->loc); | |
4625 | } | |
4626 | ||
4627 | ret->typ = ctype_bool; | |
4628 | } | |
4629 | break; | |
4630 | ||
4631 | case TTILDE: | |
4632 | if (ctype_isForceRealInt (&tr)) | |
4633 | { | |
4634 | } | |
4635 | else | |
4636 | { | |
4637 | if (context_msgStrictOps ()) | |
4638 | { | |
4639 | voptgenerror | |
4640 | (FLG_STRICTOPS, | |
4641 | message ("Operand of %s is non-integer (%t): %s", | |
4642 | lltok_unparse (op), te, exprNode_unparse (ret)), | |
4643 | e->loc); | |
4644 | } | |
4645 | ||
4646 | if (ctype_isInt (e->typ)) | |
4647 | { | |
4648 | ret->typ = e->typ; | |
4649 | } | |
4650 | else | |
4651 | { | |
4652 | ret->typ = ctype_int; | |
4653 | } | |
4654 | } | |
4655 | break; | |
4656 | ||
4657 | case TAMPERSAND: | |
4658 | ret->typ = ctype_makePointer (e->typ); | |
4659 | ||
4660 | if (sRef_isKnown (e->sref)) | |
4661 | { | |
4662 | ret->sref = sRef_makeAddress (e->sref); | |
4663 | } | |
4664 | ||
4665 | break; | |
4666 | ||
4667 | case TMULT: | |
4668 | ||
4669 | if (ctype_isAP (tr)) | |
4670 | { | |
4671 | ret->typ = ctype_baseArrayPtr (e->typ); | |
4672 | } | |
4673 | else | |
4674 | { | |
4675 | if (ctype_isKnown (te)) | |
4676 | { | |
4677 | if (ctype_isFunction (te)) | |
4678 | { | |
4679 | ret->typ = e->typ; | |
4680 | ||
4681 | voptgenerror | |
4682 | (FLG_FCNDEREF, | |
4683 | message ("Dereference of function type (%t): %s", | |
4684 | te, exprNode_unparse (ret)), | |
4685 | e->loc); | |
4686 | } | |
4687 | else | |
4688 | { | |
4689 | voptgenerror (FLG_TYPE, | |
4690 | message ("Dereference of non-pointer (%t): %s", | |
4691 | te, exprNode_unparse (ret)), | |
4692 | e->loc); | |
4693 | ret->typ = ctype_unknown; | |
4694 | } | |
4695 | } | |
4696 | else | |
4697 | { | |
4698 | ret->typ = ctype_unknown; | |
4699 | } | |
4700 | ||
4701 | } | |
4702 | ||
4703 | if (sRef_isKnown (e->sref)) | |
4704 | { | |
4705 | DPRINTF (("Checking possibly null: %s", sRef_unparseFull (e->sref))); | |
4706 | ||
4707 | if (sRef_possiblyNull (e->sref)) | |
4708 | { | |
4709 | DPRINTF (("Checking possibly null: %s", sRef_unparse (e->sref))); | |
4710 | if (!usymtab_isGuarded (e->sref) && !context_inProtectVars ()) | |
4711 | { | |
4712 | if (optgenerror | |
4713 | (FLG_NULLDEREF, | |
4714 | message ("Dereference of %s pointer %q: %s", | |
4715 | sRef_nullMessage (e->sref), | |
4716 | sRef_unparse (e->sref), | |
4717 | exprNode_unparse (ret)), | |
4718 | e->loc)) | |
4719 | { | |
4720 | sRef_showNullInfo (e->sref); | |
4721 | sRef_setNotNull (e->sref, e->loc); /* suppress future messages */ | |
4722 | } | |
4723 | } | |
4724 | } | |
4725 | ||
4726 | ret->sref = sRef_makePointer (e->sref); | |
4727 | } | |
4728 | break; | |
4729 | ||
4730 | default: | |
4731 | llbug (message ("exprNode_preOp: unhandled op: %s", lltok_unparse (op))); | |
4732 | } | |
4733 | ||
4734 | if (checkMod) | |
4735 | { | |
4736 | exprNode_checkModify (e, ret); | |
4737 | } | |
4738 | ||
4739 | return ret; | |
4740 | } | |
4741 | ||
4742 | /* | |
4743 | ** any reason to disallow sizeof (abstract type) ? | |
4744 | */ | |
4745 | ||
4746 | /* | |
4747 | ** used by both sizeof | |
4748 | */ | |
4749 | ||
4750 | static | |
4751 | ctype sizeof_resultType (void) | |
4752 | { | |
4753 | static ctype sizet = ctype_unknown; | |
4754 | ||
4755 | if (ctype_isUnknown (sizet)) | |
4756 | { | |
4757 | if (usymtab_existsType (cstring_makeLiteralTemp ("size_t"))) | |
4758 | { | |
4759 | sizet = uentry_getAbstractType (usymtab_lookup (cstring_makeLiteralTemp ("size_t"))); | |
4760 | } | |
4761 | else | |
4762 | { | |
4763 | sizet = ctype_ulint; | |
4764 | } | |
4765 | } | |
4766 | return sizet; | |
4767 | } | |
4768 | ||
4769 | exprNode | |
4770 | exprNode_sizeofType (/*@only@*/ qtype qt) | |
4771 | { | |
4772 | exprNode ret = exprNode_create (sizeof_resultType ()); | |
4773 | ctype ct = qtype_getType (qt); | |
4774 | ||
4775 | ret->kind = XPR_SIZEOFT; | |
4776 | ret->edata = exprData_makeSizeofType (qt); | |
4777 | ||
4778 | voptgenerror (FLG_SIZEOFTYPE, | |
4779 | message ("Parameter to sizeof is type %s: %s", | |
4780 | ctype_unparse (ct), | |
4781 | exprNode_unparse (ret)), | |
4782 | ret->loc); | |
4783 | ||
4784 | return (ret); | |
4785 | } | |
4786 | ||
4787 | exprNode | |
4788 | exprNode_alignofType (/*@only@*/ qtype qt) | |
4789 | { | |
4790 | exprNode ret = exprNode_create (sizeof_resultType ()); | |
4791 | ctype ct = qtype_getType (qt); | |
4792 | ||
4793 | ret->kind = XPR_ALIGNOFT; | |
4794 | ret->edata = exprData_makeSizeofType (qt); | |
4795 | ||
4796 | voptgenerror (FLG_SIZEOFTYPE, | |
4797 | message ("Parameter to alignof is type %s: %s", | |
4798 | ctype_unparse (ct), | |
4799 | exprNode_unparse (ret)), | |
4800 | ret->loc); | |
4801 | ||
4802 | return (ret); | |
4803 | } | |
4804 | ||
4805 | exprNode exprNode_offsetof (qtype qt, cstringList s) | |
4806 | { | |
4807 | exprNode ret = exprNode_create (sizeof_resultType ()); | |
4808 | ctype ct = qtype_getType (qt); | |
4809 | ||
4810 | ret->kind = XPR_OFFSETOF; | |
4811 | ret->edata = exprData_makeOffsetof (qt, s); | |
4812 | ||
4813 | if (!ctype_isRealSU (ct)) | |
4814 | { | |
4815 | voptgenerror (FLG_TYPE, | |
4816 | message ("First parameter to offsetof is not a " | |
4817 | "struct or union type (type %s): %s", | |
4818 | ctype_unparse (ct), | |
4819 | exprNode_unparse (ret)), | |
4820 | ret->loc); | |
4821 | } | |
4822 | else | |
4823 | { | |
4824 | ctype lt = ct; | |
4825 | ||
4826 | cstringList_elements (s, el) { | |
4827 | uentryList fields; | |
4828 | uentry fld; | |
4829 | ||
4830 | if (ctype_isUndefined (lt)) | |
4831 | { | |
4832 | break; | |
4833 | } | |
4834 | else if (!ctype_isRealSU (lt)) | |
4835 | { | |
4836 | voptgenerror (FLG_TYPE, | |
4837 | message ("Inner offsetof type is not a " | |
4838 | "struct or union type (type %s before field %s): %s", | |
4839 | ctype_unparse (lt), el, | |
4840 | exprNode_unparse (ret)), | |
4841 | ret->loc); | |
4842 | break; | |
4843 | } | |
4844 | else | |
4845 | { | |
4846 | fields = ctype_getFields (ctype_realType (lt)); | |
4847 | fld = uentryList_lookupField (fields, el); | |
4848 | DPRINTF (("Try: %s / %s", ctype_unparse (lt), el)); | |
4849 | ||
4850 | if (uentry_isUndefined (fld)) | |
4851 | { | |
4852 | if (ctype_equal (lt, ct)) { | |
4853 | voptgenerror (FLG_TYPE, | |
4854 | message ("Field %s in offsetof is not the " | |
4855 | "name of a field of %s: %s", | |
4856 | el, | |
4857 | ctype_unparse (ct), | |
4858 | exprNode_unparse (ret)), | |
4859 | ret->loc); | |
4860 | } else { | |
4861 | voptgenerror (FLG_TYPE, | |
4862 | message ("Deep field %s in offsetof is not the " | |
4863 | "name of a field of %s: %s", | |
4864 | el, | |
4865 | ctype_unparse (lt), | |
4866 | exprNode_unparse (ret)), | |
4867 | ret->loc); | |
4868 | } | |
4869 | } | |
4870 | else | |
4871 | { | |
4872 | lt = uentry_getType (fld); | |
4873 | } | |
4874 | } | |
4875 | } end_cstringList_elements; | |
4876 | ||
4877 | /* Should report error if its a bit field - behavior is undefined! */ | |
4878 | } | |
4879 | ||
4880 | return (ret); | |
4881 | } | |
4882 | ||
4883 | /*@only@*/ exprNode | |
4884 | exprNode_sizeofExpr (/*@only@*/ exprNode e) | |
4885 | { | |
4886 | exprNode ret; | |
4887 | ||
4888 | if (exprNode_isUndefined (e)) | |
4889 | { | |
4890 | ret = exprNode_createLoc (ctype_unknown, fileloc_copy (g_currentloc)); | |
4891 | ret->edata = exprData_makeSingle (e); | |
4892 | ret->typ = sizeof_resultType (); | |
4893 | ret->kind = XPR_SIZEOF; | |
4894 | } | |
4895 | else | |
4896 | { | |
4897 | uentry u = exprNode_getUentry (e); | |
4898 | ||
4899 | ret = exprNode_createPartialCopy (e); | |
4900 | ret->edata = exprData_makeSingle (e); | |
4901 | ||
4902 | ret->typ = sizeof_resultType (); | |
4903 | ret->kind = XPR_SIZEOF; | |
4904 | ||
4905 | if (uentry_isValid (u) | |
4906 | && uentry_isRefParam (u) | |
4907 | && ctype_isRealArray (uentry_getType (u))) | |
4908 | { | |
4909 | voptgenerror | |
4910 | (FLG_SIZEOFFORMALARRAY, | |
4911 | message ("Parameter to sizeof is an array-type function parameter: %s", | |
4912 | exprNode_unparse (ret)), | |
4913 | ret->loc); | |
4914 | } | |
4915 | } | |
4916 | ||
4917 | /* | |
4918 | ** sizeof (x) doesn't "really" use x | |
4919 | */ | |
4920 | ||
4921 | return (ret); | |
4922 | } | |
4923 | ||
4924 | /*@only@*/ exprNode | |
4925 | exprNode_alignofExpr (/*@only@*/ exprNode e) | |
4926 | { | |
4927 | exprNode ret; | |
4928 | ||
4929 | if (exprNode_isUndefined (e)) | |
4930 | { | |
4931 | ret = exprNode_createLoc (ctype_unknown, fileloc_copy (g_currentloc)); | |
4932 | } | |
4933 | else | |
4934 | { | |
4935 | ret = exprNode_createPartialCopy (e); | |
4936 | } | |
4937 | ||
4938 | ret->edata = exprData_makeSingle (e); | |
4939 | ret->typ = sizeof_resultType (); | |
4940 | ret->kind = XPR_ALIGNOF; | |
4941 | ||
4942 | /* | |
4943 | ** sizeof (x) doesn't "really" use x | |
4944 | */ | |
4945 | ||
4946 | return (ret); | |
4947 | } | |
4948 | ||
4949 | /*@only@*/ exprNode | |
4950 | exprNode_cast (/*@only@*/ lltok tok, /*@only@*/ exprNode e, /*@only@*/ qtype q) | |
4951 | { | |
4952 | ctype c; | |
4953 | ctype t; | |
4954 | exprNode ret; | |
4955 | ||
4956 | if (exprNode_isError (e)) | |
4957 | { | |
4958 | qtype_free (q); | |
4959 | lltok_release (tok); | |
4960 | return exprNode_undefined; | |
4961 | } | |
4962 | ||
4963 | checkMacroParen (e); | |
4964 | ||
4965 | c = qtype_getType (q); | |
4966 | t = exprNode_getType (e); | |
4967 | ||
4968 | ret = exprNode_createPartialCopy (e); | |
4969 | ||
4970 | ret->loc = fileloc_update (ret->loc, lltok_getLoc (tok)); | |
4971 | ret->typ = c; | |
4972 | ret->kind = XPR_CAST; | |
4973 | ret->edata = exprData_makeCast (tok, e, q); | |
4974 | ||
4975 | if (ctype_isRealSU (ctype_getBaseType (sRef_getType (e->sref)))) | |
4976 | { | |
4977 | /* | |
4978 | ** This is a bit of a hack to avoid a problem | |
4979 | ** when the code does, | |
4980 | ** (some other struct) x | |
4981 | ** ... | |
4982 | ** x->field | |
4983 | */ | |
4984 | ||
4985 | ret->sref = sRef_copy (e->sref); | |
4986 | usymtab_addForceMustAlias (ret->sref, e->sref); | |
4987 | sRef_setTypeFull (ret->sref, c); | |
4988 | DPRINTF (("Cast: %s -> %s", sRef_unparseFull (e->sref), | |
4989 | sRef_unparseFull (ret->sref))); | |
4990 | } | |
4991 | else | |
4992 | { | |
4993 | ret->sref = e->sref; | |
4994 | sRef_setTypeFull (ret->sref, c); | |
4995 | DPRINTF (("Cast 2: -> %s", sRef_unparseFull (ret->sref))); | |
4996 | } | |
4997 | ||
4998 | /* | |
4999 | ** we allow | |
5000 | ** abstract -> void | |
5001 | ** 0 <-> abstract * | |
5002 | ** void * <-> abstract * (if FLG_ABSTVOIDP) | |
5003 | ** abstract * <-> void * (if FLG_ABSTVOIDP) | |
5004 | */ | |
5005 | ||
5006 | if (ctype_isVoid (c)) /* cast to void is always okay --- discard value */ | |
5007 | { | |
5008 | ; | |
5009 | } | |
5010 | else if (ctype_isRealAP (c)) /* casting to array or pointer */ | |
5011 | { | |
5012 | ctype bc = ctype_getBaseType (c); | |
5013 | ctype bt = ctype_getBaseType (t); | |
5014 | ctype rt = ctype_realType (t); | |
5015 | ||
5016 | if (ctype_isFunction (ctype_baseArrayPtr (ctype_realType (c))) | |
5017 | && (ctype_isArrayPtr (rt) | |
5018 | && !ctype_isFunction (ctype_realType (ctype_baseArrayPtr (rt))))) | |
5019 | { | |
5020 | voptgenerror | |
5021 | (FLG_CASTFCNPTR, | |
5022 | message ("Cast from function pointer type (%t) to " | |
5023 | "non-function pointer (%t): %s", | |
5024 | c, t, exprNode_unparse (ret)), | |
5025 | e->loc); | |
5026 | } | |
5027 | ||
5028 | if (!ctype_isFunction (ctype_baseArrayPtr (c)) | |
5029 | && (ctype_isArrayPtr (rt) | |
5030 | && ctype_isFunction (ctype_realType (ctype_baseArrayPtr (rt))))) | |
5031 | { | |
5032 | voptgenerror | |
5033 | (FLG_CASTFCNPTR, | |
5034 | message ("Cast from non-function pointer type (%t) to " | |
5035 | "function pointer (%t): %s", | |
5036 | c, t, exprNode_unparse (ret)), | |
5037 | e->loc); | |
5038 | } | |
5039 | ||
5040 | if (exprNode_isZero (e) && context_getFlag (FLG_ZEROPTR) && | |
5041 | !(ctype_isRealAbstract (bc) | |
5042 | && context_hasAccess (ctype_typeId (bc)))) | |
5043 | { | |
5044 | ; /* okay to cast zero */ | |
5045 | } | |
5046 | else | |
5047 | { | |
5048 | if (ctype_isRealAbstract (bc) | |
5049 | && !context_hasAccess (ctype_typeId (bc))) | |
5050 | { | |
5051 | if (ctype_isVoidPointer (t) || ctype_isUnknown (t)) | |
5052 | { | |
5053 | vnoptgenerror | |
5054 | (FLG_ABSTVOIDP, | |
5055 | message ("Cast to underlying abstract type %t: %s", | |
5056 | c, exprNode_unparse (ret)), | |
5057 | e->loc); | |
5058 | } | |
5059 | else | |
5060 | { | |
5061 | voptgenerror | |
5062 | (FLG_ABSTRACT, | |
5063 | message ("Cast to underlying abstract type %t: %s", | |
5064 | c, exprNode_unparse (ret)), | |
5065 | e->loc); | |
5066 | } | |
5067 | } | |
5068 | ||
5069 | if (ctype_isRealAbstract (bt) | |
5070 | && !context_hasAccess (ctype_typeId (bt))) | |
5071 | { | |
5072 | if (ctype_isUnknown (c) || ctype_isVoidPointer (c)) | |
5073 | { | |
5074 | vnoptgenerror | |
5075 | (FLG_ABSTVOIDP, | |
5076 | message ("Cast from underlying abstract type %t: %s", | |
5077 | t, exprNode_unparse (ret)), | |
5078 | e->loc); | |
5079 | } | |
5080 | else | |
5081 | { | |
5082 | voptgenerror | |
5083 | (FLG_ABSTRACT, | |
5084 | message ("Cast from underlying abstract type %t: %s", | |
5085 | t, exprNode_unparse (ret)), | |
5086 | e->loc); | |
5087 | } | |
5088 | } | |
5089 | } | |
5090 | } | |
5091 | else | |
5092 | { | |
5093 | ctype bt = ctype_realType (ctype_getBaseType (t)); | |
5094 | ctype bc = ctype_realType (ctype_getBaseType (c)); | |
5095 | ||
5096 | if (ctype_isAbstract (bt) && !context_hasAccess (ctype_typeId (bt))) | |
5097 | { | |
5098 | if (ctype_match (c, t)) | |
5099 | { | |
5100 | if (ctype_equal (c, t)) | |
5101 | { | |
5102 | voptgenerror | |
5103 | (FLG_TYPE, | |
5104 | message ("Redundant cast involving abstract type %t: %s", | |
5105 | bt, exprNode_unparse (ret)), | |
5106 | e->loc); | |
5107 | } | |
5108 | } | |
5109 | else | |
5110 | { | |
5111 | voptgenerror | |
5112 | (FLG_ABSTRACT, | |
5113 | message ("Cast from abstract type %t: %s", | |
5114 | bt, exprNode_unparse (ret)), | |
5115 | e->loc); | |
5116 | } | |
5117 | } | |
5118 | ||
5119 | if (ctype_isAbstract (bc) | |
5120 | && !context_hasAccess (ctype_typeId (bc))) | |
5121 | { | |
5122 | if (ctype_match (c, t)) | |
5123 | { | |
5124 | ; | |
5125 | } | |
5126 | else | |
5127 | { | |
5128 | DPRINTF (("No access to: %s / %d", | |
5129 | ctype_unparse (bc), ctype_typeId (bc))); | |
5130 | DPRINTF (("Context %s %s", | |
5131 | bool_unparse (context_inFunctionLike ()), | |
5132 | context_unparse ())); | |
5133 | voptgenerror | |
5134 | (FLG_ABSTRACT, | |
5135 | message ("Cast to abstract type %t: %s", bc, | |
5136 | exprNode_unparse (ret)), | |
5137 | e->loc); | |
5138 | } | |
5139 | } | |
5140 | } | |
5141 | ||
5142 | if (ctype_isAbstract (c)) | |
5143 | { | |
5144 | if (sRef_isExposed (e->sref) || sRef_isOnly (e->sref)) | |
5145 | { | |
5146 | /* okay, cast exposed to abstract */ | |
5147 | sRef_clearExKindComplete (ret->sref, fileloc_undefined); | |
5148 | } | |
5149 | else | |
5150 | { | |
5151 | if (ctype_isVisiblySharable (t) | |
5152 | && sRef_isExternallyVisible (e->sref) | |
5153 | && !(ctype_isAbstract (t) | |
5154 | && context_hasAccess (ctype_typeId (t)))) | |
5155 | { | |
5156 | voptgenerror | |
5157 | (FLG_CASTEXPOSE, | |
5158 | message ("Cast to abstract type from externally visible " | |
5159 | "mutable storage exposes rep of %s: %s", | |
5160 | ctype_unparse (c), | |
5161 | exprNode_unparse (e)), | |
5162 | e->loc); | |
5163 | } | |
5164 | } | |
5165 | } | |
5166 | ||
5167 | return (ret); | |
5168 | } | |
5169 | ||
5170 | static bool | |
5171 | evaluationOrderUndefined (lltok op) | |
5172 | { | |
5173 | int opid = lltok_getTok (op); | |
5174 | ||
5175 | return (opid != AND_OP && opid != OR_OP); | |
5176 | } | |
5177 | ||
5178 | static bool checkIntegral (/*@notnull@*/ exprNode e1, | |
5179 | /*@notnull@*/ exprNode e2, | |
5180 | /*@notnull@*/ exprNode ret, | |
5181 | lltok op) | |
5182 | { | |
5183 | bool error = FALSE; | |
5184 | ||
5185 | ctype te1 = exprNode_getType (e1); | |
5186 | ctype te2 = exprNode_getType (e2); | |
5187 | ||
5188 | ctype tr1 = ctype_realishType (te1); | |
5189 | ctype tr2 = ctype_realishType (te2); | |
5190 | ||
5191 | if (ctype_isForceRealInt (&tr1) && ctype_isForceRealInt (&tr2)) | |
5192 | { | |
5193 | ; | |
5194 | } | |
5195 | else | |
5196 | { | |
5197 | if (context_msgStrictOps ()) | |
5198 | { | |
5199 | if (!ctype_isInt (tr1) && !ctype_isInt (tr2)) | |
5200 | { | |
5201 | if (ctype_sameName (te1, te2)) | |
5202 | { | |
5203 | error = optgenerror | |
5204 | (FLG_STRICTOPS, | |
5205 | message ("Operands of %s are non-integer (%t): %s", | |
5206 | lltok_unparse (op), te1, | |
5207 | exprNode_unparse (ret)), | |
5208 | e1->loc); | |
5209 | } | |
5210 | else | |
5211 | { | |
5212 | error = optgenerror | |
5213 | (FLG_STRICTOPS, | |
5214 | message ("Operands of %s are non-integers (%t, %t): %s", | |
5215 | lltok_unparse (op), te1, te2, | |
5216 | exprNode_unparse (ret)), | |
5217 | e1->loc); | |
5218 | } | |
5219 | } | |
5220 | else if (!ctype_isInt (tr1)) | |
5221 | { | |
5222 | error = optgenerror | |
5223 | (FLG_STRICTOPS, | |
5224 | message ("Left operand of %s is non-integer (%t): %s", | |
5225 | lltok_unparse (op), te1, exprNode_unparse (ret)), | |
5226 | e1->loc); | |
5227 | } | |
5228 | else | |
5229 | /* !ctype_isInt (te2) */ | |
5230 | { | |
5231 | error = optgenerror | |
5232 | (FLG_STRICTOPS, | |
5233 | message ("Right operand of %s is non-integer (%t): %s", | |
5234 | lltok_unparse (op), te2, exprNode_unparse (ret)), | |
5235 | e2->loc); | |
5236 | } | |
5237 | } | |
5238 | } | |
5239 | ||
5240 | return !error; | |
5241 | } | |
5242 | ||
5243 | /* | |
5244 | ** returns exprNode representing e1 op e2 | |
5245 | ** | |
5246 | ** uses msg if there are errors | |
5247 | ** can be used for both assignment ops and regular ops | |
5248 | ** | |
5249 | ** modifies e1 | |
5250 | */ | |
5251 | ||
5252 | static /*@only@*/ /*@notnull@*/ exprNode | |
5253 | exprNode_makeOp (/*@keep@*/ exprNode e1, /*@keep@*/ exprNode e2, | |
5254 | /*@keep@*/ lltok op) | |
5255 | { | |
5256 | ctype te1, te2, tr1, tr2, tret; | |
5257 | int opid = lltok_getTok (op); | |
5258 | bool hasError = FALSE; | |
5259 | exprNode ret; | |
5260 | ||
5261 | if (exprNode_isError (e1)) | |
5262 | { | |
5263 | ret = exprNode_createPartialNVCopy (e2); | |
5264 | } | |
5265 | else | |
5266 | { | |
5267 | ret = exprNode_createPartialNVCopy (e1); | |
5268 | } | |
5269 | ||
5270 | ret->val = multiVal_undefined; | |
5271 | ||
5272 | ret->kind = XPR_OP; | |
5273 | ret->edata = exprData_makeOp (e1, e2, op); | |
5274 | ||
5275 | if (exprNode_isError (e1) || exprNode_isError (e2)) | |
5276 | { | |
5277 | if (opid == TLT || opid == TGT || opid == LE_OP || opid == GE_OP | |
5278 | || opid == EQ_OP || opid == NE_OP | |
5279 | || opid == AND_OP || opid == OR_OP) | |
5280 | { | |
5281 | ret->typ = ctype_bool; | |
5282 | } | |
5283 | ||
5284 | if (exprNode_isDefined (e1)) | |
5285 | { | |
5286 | exprNode_checkUse (ret, e1->sref, e1->loc); | |
5287 | } | |
5288 | ||
5289 | if (exprNode_isDefined (e2)) | |
5290 | { | |
5291 | exprNode_mergeUSs (ret, e2); | |
5292 | exprNode_checkUse (ret, e2->sref, e2->loc); | |
5293 | } | |
5294 | ||
5295 | return ret; | |
5296 | } | |
5297 | ||
5298 | tret = ctype_unknown; | |
5299 | te1 = exprNode_getType (e1); | |
5300 | ||
5301 | DPRINTF (("te1 = %s / %s", exprNode_unparse (e1), ctype_unparse (te1))); | |
5302 | ||
5303 | te2 = exprNode_getType (e2); | |
5304 | ||
5305 | tr1 = ctype_realishType (te1); | |
5306 | tr2 = ctype_realishType (te2); | |
5307 | ||
5308 | if (opid == OR_OP) | |
5309 | { | |
5310 | ret->guards = guardSet_or (ret->guards, e2->guards); | |
5311 | } | |
5312 | else if (opid == AND_OP) | |
5313 | { | |
5314 | ret->guards = guardSet_and (ret->guards, e2->guards); | |
5315 | } | |
5316 | else | |
5317 | { | |
5318 | /* no guards */ | |
5319 | } | |
5320 | ||
5321 | if (opid == EQ_OP || opid == NE_OP) | |
5322 | { | |
5323 | exprNode temp1 = e1, temp2 = e2; | |
5324 | ||
5325 | /* could do NULL == x */ | |
5326 | ||
5327 | if (exprNode_isNullValue (e1) || exprNode_isUnknownConstant (e1)) | |
5328 | { | |
5329 | temp1 = e2; temp2 = e1; | |
5330 | } | |
5331 | ||
5332 | if (exprNode_isNullValue (temp2) || exprNode_isUnknownConstant (temp2)) | |
5333 | { | |
5334 | reflectNullTest (temp1, (opid == NE_OP)); | |
5335 | guardSet_free (ret->guards); | |
5336 | ret->guards = guardSet_copy (temp1->guards); | |
5337 | } | |
5338 | } | |
5339 | ||
5340 | if (opid == TLT || opid == TGT || opid == LE_OP || opid == GE_OP | |
5341 | || opid == EQ_OP || opid == NE_OP || opid == AND_OP || opid == OR_OP) | |
5342 | { | |
5343 | tret = ctype_bool; | |
5344 | } | |
5345 | ||
5346 | if (anyAbstract (tr1, tr2) && | |
5347 | (!((ctype_isRealBool (te1) || ctype_isRealBool (te2)) && | |
5348 | (opid == AND_OP || opid == OR_OP | |
5349 | || opid == EQ_OP || opid == NE_OP)))) | |
5350 | { | |
5351 | abstractOpError (tr1, tr2, op, e1, e2, e1->loc, e2->loc); | |
5352 | } | |
5353 | else if (ctype_isUnknown (te1) || ctype_isUnknown (te2)) | |
5354 | { | |
5355 | /* unknown types, no comparisons possible */ | |
5356 | } | |
5357 | else | |
5358 | { | |
5359 | switch (opid) | |
5360 | { | |
5361 | case TMULT: /* multiplication and division: */ | |
5362 | case TDIV: /* */ | |
5363 | case MUL_ASSIGN: /* numeric, numeric -> numeric */ | |
5364 | case DIV_ASSIGN: /* */ | |
5365 | ||
5366 | if (opid == TMULT || opid == MUL_ASSIGN) | |
5367 | { | |
5368 | ret->val = multiVal_multiply (exprNode_getValue (e1), | |
5369 | exprNode_getValue (e2)); | |
5370 | } | |
5371 | else | |
5372 | { | |
5373 | ret->val = multiVal_divide (exprNode_getValue (e1), | |
5374 | exprNode_getValue (e2)); | |
5375 | } | |
5376 | ||
5377 | tret = checkNumerics (tr1, tr2, te1, te2, e1, e2, op); | |
5378 | break; | |
5379 | ||
5380 | case TPLUS: /* addition and subtraction: */ | |
5381 | case TMINUS: /* pointer, int -> pointer */ | |
5382 | case SUB_ASSIGN: /* int, pointer -> pointer */ | |
5383 | case ADD_ASSIGN: /* numeric, numeric -> numeric */ | |
5384 | ||
5385 | if (opid == TPLUS || opid == ADD_ASSIGN) | |
5386 | { | |
5387 | ret->val = multiVal_add (exprNode_getValue (e1), | |
5388 | exprNode_getValue (e2)); | |
5389 | } | |
5390 | else | |
5391 | { | |
5392 | ret->val = multiVal_subtract (exprNode_getValue (e1), | |
5393 | exprNode_getValue (e2)); | |
5394 | } | |
5395 | ||
5396 | tr1 = ctype_fixArrayPtr (tr1); | |
5397 | ||
5398 | if ((ctype_isRealPointer (tr1) && !exprNode_isNullValue (e1)) | |
5399 | && (!ctype_isRealPointer (tr2) && ctype_isRealInt (tr2))) | |
5400 | { | |
5401 | /* pointer + int */ | |
5402 | ||
5403 | if (context_msgPointerArith ()) | |
5404 | { | |
5405 | voptgenerror | |
5406 | (FLG_POINTERARITH, | |
5407 | message ("Pointer arithmetic (%t, %t): %s", | |
5408 | te1, te2, exprNode_unparse (ret)), | |
5409 | e1->loc); | |
5410 | } | |
5411 | ||
5412 | /* | |
5413 | ** Swap terms so e1 is always the pointer | |
5414 | */ | |
5415 | ||
5416 | if (ctype_isRealPointer (tr1)) | |
5417 | { | |
5418 | ; | |
5419 | } | |
5420 | else | |
5421 | { | |
5422 | exprNode_swap (e1, e2); | |
5423 | } | |
5424 | ||
5425 | ||
5426 | if (sRef_possiblyNull (e1->sref) | |
5427 | && !usymtab_isGuarded (e1->sref)) | |
5428 | { | |
5429 | voptgenerror | |
5430 | (FLG_NULLPOINTERARITH, | |
5431 | message ("Pointer arithmetic involving possibly " | |
5432 | "null pointer %s: %s", | |
5433 | exprNode_unparse (e1), | |
5434 | exprNode_unparse (ret)), | |
5435 | e1->loc); | |
5436 | } | |
5437 | ||
5438 | ret->sref = sRef_copy (e1->sref); | |
5439 | ||
5440 | /* start modifications */ | |
5441 | /* added by Seejo on 4/16/2000 */ | |
5442 | ||
5443 | /* Arithmetic operations on pointers wil modify the size/len/null terminated | |
5444 | status */ | |
5445 | if ((sRef_isPossiblyNullTerminated (e1->sref)) || (sRef_isNullTerminated(e1->sref))) { | |
5446 | int val; | |
5447 | /*drl 1-4-2002 | |
5448 | added ugly fixed to stop | |
5449 | program from crashing on point + int +int | |
5450 | one day I'll fix this or ask Seejo wtf the codes supposed to do. */ | |
5451 | ||
5452 | if (!multiVal_isInt (e2->val) ) | |
5453 | break; | |
5454 | /*end drl*/ | |
5455 | ||
5456 | val = (int) multiVal_forceInt (e2->val); | |
5457 | ||
5458 | /* Operator : + or += */ | |
5459 | if ((lltok_getTok (op) == TPLUS) || (lltok_getTok(op) == ADD_ASSIGN)) { | |
5460 | if (sRef_getSize(e1->sref) >= val) {/* Incrementing the pointer by | |
5461 | val should not result in a | |
5462 | size < 0 (size = 0 is ok !) */ | |
5463 | ||
5464 | sRef_setSize (ret->sref, sRef_getSize(e1->sref) - val); | |
5465 | ||
5466 | if (sRef_getLen(e1->sref) == val) { /* i.e. the character at posn val is \0 */ | |
5467 | sRef_setNotNullTerminatedState(ret->sref); | |
5468 | sRef_resetLen (ret->sref); | |
5469 | } else { | |
5470 | sRef_setNullTerminatedState(ret->sref); | |
5471 | sRef_setLen (ret->sref, sRef_getLen(e1->sref) - val); | |
5472 | } | |
5473 | } | |
5474 | } | |
5475 | ||
5476 | /* Operator : - or -= */ | |
5477 | if ((lltok_getTok (op) == TMINUS) || (lltok_getTok (op) == SUB_ASSIGN)) { | |
5478 | if (sRef_getSize(e1->sref) >= 0) { | |
5479 | sRef_setSize (ret->sref, sRef_getSize(e1->sref) + val); | |
5480 | sRef_setLen (ret->sref, sRef_getLen(e1->sref) + val); | |
5481 | } | |
5482 | } | |
5483 | } | |
5484 | ||
5485 | /* end modifications */ | |
5486 | ||
5487 | sRef_setNullError (ret->sref); | |
5488 | ||
5489 | /* | |
5490 | ** Fixed for 2.2c: the alias state of ptr + int is dependent, | |
5491 | ** since is points to storage that should not be deallocated | |
5492 | ** through this pointer. | |
5493 | */ | |
5494 | ||
5495 | if (sRef_isOnly (ret->sref) | |
5496 | || sRef_isFresh (ret->sref)) | |
5497 | { | |
5498 | sRef_setAliasKind (ret->sref, AK_DEPENDENT, exprNode_loc (ret)); | |
5499 | } | |
5500 | ||
5501 | tret = e1->typ; | |
5502 | } | |
5503 | else if ((!ctype_isRealPointer(tr1) && ctype_isRealInt (tr1)) | |
5504 | && (ctype_isRealPointer (tr2) && !exprNode_isNullValue (e2))) | |
5505 | { | |
5506 | if (context_msgPointerArith ()) | |
5507 | { | |
5508 | voptgenerror | |
5509 | (FLG_POINTERARITH, | |
5510 | message ("Pointer arithmetic (%t, %t): %s", | |
5511 | te1, te2, exprNode_unparse (ret)), | |
5512 | e1->loc); | |
5513 | } | |
5514 | ||
5515 | if (sRef_possiblyNull (e1->sref) | |
5516 | && !usymtab_isGuarded (e1->sref)) | |
5517 | { | |
5518 | voptgenerror | |
5519 | (FLG_NULLPOINTERARITH, | |
5520 | message ("Pointer arithmetic involving possibly " | |
5521 | "null pointer %s: %s", | |
5522 | exprNode_unparse (e2), | |
5523 | exprNode_unparse (ret)), | |
5524 | e2->loc); | |
5525 | } | |
5526 | ||
5527 | ret->sref = sRef_copy (e2->sref); | |
5528 | ||
5529 | /* start modifications */ | |
5530 | /* added by Seejo on 4/16/2000 */ | |
5531 | ||
5532 | /* Arithmetic operations on pointers wil modify the size/len/null terminated | |
5533 | status */ | |
5534 | ||
5535 | if ((sRef_isPossiblyNullTerminated (e2->sref)) || (sRef_isNullTerminated(e2->sref))) { | |
5536 | int val = (int) multiVal_forceInt (e1->val); | |
5537 | ||
5538 | /* Operator : + or += */ | |
5539 | if ((lltok_getTok (op) == TPLUS) || (lltok_getTok(op) == ADD_ASSIGN)) { | |
5540 | if (sRef_getSize(e2->sref) >= val) {/* Incrementing the pointer by | |
5541 | val should not result in a | |
5542 | size < 0 (size = 0 is ok !) */ | |
5543 | ||
5544 | sRef_setSize (ret->sref, sRef_getSize(e2->sref) - val); | |
5545 | ||
5546 | if (sRef_getLen(e2->sref) == val) { /* i.e. the character at posn val is \0 */ | |
5547 | sRef_setNotNullTerminatedState(ret->sref); | |
5548 | sRef_resetLen (ret->sref); | |
5549 | } else { | |
5550 | sRef_setNullTerminatedState(ret->sref); | |
5551 | sRef_setLen (ret->sref, sRef_getLen(e2->sref) - val); | |
5552 | } | |
5553 | } | |
5554 | } | |
5555 | ||
5556 | /* Operator : - or -= */ | |
5557 | if ((lltok_getTok (op) == TMINUS) || (lltok_getTok (op) == SUB_ASSIGN)) { | |
5558 | if (sRef_getSize(e2->sref) >= 0) { | |
5559 | sRef_setSize (ret->sref, sRef_getSize(e2->sref) + val); | |
5560 | sRef_setLen (ret->sref, sRef_getLen(e2->sref) + val); | |
5561 | } | |
5562 | } | |
5563 | } | |
5564 | /* end modifications */ | |
5565 | ||
5566 | sRef_setNullError (ret->sref); | |
5567 | ||
5568 | /* | |
5569 | ** Fixed for 2.2c: the alias state of ptr + int is dependent, | |
5570 | ** since is points to storage that should not be deallocated | |
5571 | ** through this pointer. | |
5572 | */ | |
5573 | ||
5574 | if (sRef_isOnly (ret->sref) | |
5575 | || sRef_isFresh (ret->sref)) { | |
5576 | sRef_setAliasKind (ret->sref, AK_DEPENDENT, exprNode_loc (ret)); | |
5577 | } | |
5578 | ||
5579 | tret = e2->typ; | |
5580 | ret->sref = e2->sref; | |
5581 | } | |
5582 | else | |
5583 | { | |
5584 | tret = checkNumerics (tr1, tr2, te1, te2, e1, e2, op); | |
5585 | } | |
5586 | ||
5587 | break; | |
5588 | ||
5589 | case LEFT_ASSIGN: | |
5590 | case RIGHT_ASSIGN: | |
5591 | case LEFT_OP: | |
5592 | case RIGHT_OP: | |
5593 | case TAMPERSAND: /* bitwise & */ | |
5594 | case AND_ASSIGN: | |
5595 | case TCIRC: /* ^ (XOR) */ | |
5596 | case TBAR: | |
5597 | case XOR_ASSIGN: | |
5598 | case OR_ASSIGN: | |
5599 | { | |
5600 | bool reported = FALSE; | |
5601 | ||
5602 | /* | |
5603 | ** Shift Operator | |
5604 | */ | |
5605 | ||
5606 | if (opid == LEFT_OP || opid == LEFT_ASSIGN | |
5607 | || opid == RIGHT_OP || opid == RIGHT_ASSIGN) | |
5608 | { | |
5609 | /* | |
5610 | ** evans 2002-01-01: fixed this to follow ISO 6.5.7. | |
5611 | */ | |
5612 | ||
5613 | if (!ctype_isUnsigned (tr2) | |
5614 | && !exprNode_isNonNegative (e2)) | |
5615 | { | |
5616 | reported = optgenerror | |
5617 | (FLG_SHIFTNEGATIVE, | |
5618 | message ("Right operand of %s may be negative (%t): %s", | |
5619 | lltok_unparse (op), te2, | |
5620 | exprNode_unparse (ret)), | |
5621 | e2->loc); | |
5622 | } | |
5623 | ||
5624 | if (!ctype_isUnsigned (tr1) | |
5625 | && !exprNode_isNonNegative (e1)) | |
5626 | { | |
5627 | reported = optgenerror | |
5628 | (FLG_SHIFTIMPLEMENTATION, | |
5629 | message ("Left operand of %s may be negative (%t): %s", | |
5630 | lltok_unparse (op), te1, | |
5631 | exprNode_unparse (ret)), | |
5632 | e1->loc); | |
5633 | } | |
5634 | ||
5635 | /* | |
5636 | ** Should check size of right operand also... | |
5637 | */ | |
5638 | ||
5639 | } | |
5640 | else | |
5641 | { | |
5642 | if (!ctype_isUnsigned (tr1)) | |
5643 | { | |
5644 | if (exprNode_isNonNegative (e1)) { | |
5645 | ; | |
5646 | } else { | |
5647 | reported = optgenerror | |
5648 | (FLG_BITWISEOPS, | |
5649 | message ("Left operand of %s is not unsigned value (%t): %s", | |
5650 | lltok_unparse (op), te1, | |
5651 | exprNode_unparse (ret)), | |
5652 | e1->loc); | |
5653 | ||
5654 | if (reported) { | |
5655 | te1 = ctype_uint; | |
5656 | } | |
5657 | } | |
5658 | } | |
5659 | else | |
5660 | { | |
5661 | if (!ctype_isUnsigned (tr2)) | |
5662 | { | |
5663 | if (!exprNode_isNonNegative (e2)) { | |
5664 | reported = optgenerror | |
5665 | (FLG_BITWISEOPS, | |
5666 | message ("Right operand of %s is not unsigned value (%t): %s", | |
5667 | lltok_unparse (op), te2, | |
5668 | exprNode_unparse (ret)), | |
5669 | e2->loc); | |
5670 | } | |
5671 | } | |
5672 | } | |
5673 | } | |
5674 | ||
5675 | if (!reported) | |
5676 | { | |
5677 | if (!checkIntegral (e1, e2, ret, op)) { | |
5678 | te1 = ctype_unknown; | |
5679 | } | |
5680 | } | |
5681 | ||
5682 | DPRINTF (("Set: %s", ctype_unparse (te1))); | |
5683 | ||
5684 | /* | |
5685 | ** tret is the widest type of te1 and te2 | |
5686 | */ | |
5687 | ||
5688 | tret = ctype_widest (te1, te2); | |
5689 | break; | |
5690 | } | |
5691 | case MOD_ASSIGN: | |
5692 | case TPERCENT: | |
5693 | if (checkIntegral (e1, e2, ret, op)) { | |
5694 | tret = te1; | |
5695 | } else { | |
5696 | tret = ctype_unknown; | |
5697 | } | |
5698 | break; | |
5699 | case EQ_OP: | |
5700 | case NE_OP: | |
5701 | case TLT: /* comparisons */ | |
5702 | case TGT: /* numeric, numeric -> bool */ | |
5703 | ||
5704 | DPRINTF (("Here we go: %s / %s", | |
5705 | ctype_unparse (tr1), ctype_unparse (tr2))); | |
5706 | ||
5707 | if ((ctype_isReal (tr1) && !ctype_isInt (tr1)) | |
5708 | || (ctype_isReal (tr2) && !ctype_isInt (tr2))) | |
5709 | { | |
5710 | ctype rtype = tr1; | |
5711 | bool fepsilon = FALSE; | |
5712 | ||
5713 | if (!ctype_isReal (rtype) || ctype_isInt (rtype)) | |
5714 | { | |
5715 | rtype = tr2; | |
5716 | } | |
5717 | ||
5718 | if (opid == TLT || opid == TGT) | |
5719 | { | |
5720 | uentry ue1 = exprNode_getUentry (e1); | |
5721 | uentry ue2 = exprNode_getUentry (e2); | |
5722 | ||
5723 | /* | |
5724 | ** FLT_EPSILON, etc. really is a variable, not | |
5725 | ** a constant. | |
5726 | */ | |
5727 | ||
5728 | if (uentry_isVariable (ue1)) | |
5729 | { | |
5730 | cstring uname = uentry_rawName (ue1); | |
5731 | ||
5732 | if (cstring_equalLit (uname, "FLT_EPSILON") | |
5733 | || cstring_equalLit (uname, "DBL_EPSILON") | |
5734 | || cstring_equalLit (uname, "LDBL_EPSILON")) | |
5735 | { | |
5736 | fepsilon = TRUE; | |
5737 | } | |
5738 | } | |
5739 | ||
5740 | if (uentry_isVariable (ue2)) | |
5741 | { | |
5742 | cstring uname = uentry_rawName (ue2); | |
5743 | ||
5744 | if (cstring_equalLit (uname, "FLT_EPSILON") | |
5745 | || cstring_equalLit (uname, "DBL_EPSILON") | |
5746 | || cstring_equalLit (uname, "LDBL_EPSILON")) | |
5747 | { | |
5748 | fepsilon = TRUE; | |
5749 | } | |
5750 | } | |
5751 | } | |
5752 | ||
5753 | if (fepsilon) | |
5754 | { | |
5755 | ; /* Don't complain. */ | |
5756 | } | |
5757 | else | |
5758 | { | |
5759 | voptgenerror | |
5760 | (FLG_REALCOMPARE, | |
5761 | message ("Dangerous comparison involving %s types: %s", | |
5762 | ctype_unparse (rtype), | |
5763 | exprNode_unparse (ret)), | |
5764 | ret->loc); | |
5765 | } | |
5766 | } | |
5767 | /*@fallthrough@*/ | |
5768 | case LE_OP: | |
5769 | case GE_OP: | |
5770 | ||
5771 | /* | |
5772 | ** Types should match. | |
5773 | */ | |
5774 | ||
5775 | DPRINTF (("Match types: %s / %s", exprNode_unparse (e1), | |
5776 | exprNode_unparse (e2))); | |
5777 | ||
5778 | if (!exprNode_matchTypes (e1, e2)) | |
5779 | { | |
5780 | hasError = gentypeerror | |
5781 | (te1, e1, te2, e2, | |
5782 | message ("Operands of %s have incompatible types (%t, %t): %s", | |
5783 | lltok_unparse (op), te1, te2, exprNode_unparse (ret)), | |
5784 | e1->loc); | |
5785 | ||
5786 | } | |
5787 | ||
5788 | if (hasError | |
5789 | || (ctype_isForceRealNumeric (&tr1) | |
5790 | && ctype_isForceRealNumeric (&tr2)) || | |
5791 | (ctype_isRealPointer (tr1) && ctype_isRealPointer (tr2))) | |
5792 | { | |
5793 | ; /* okay */ | |
5794 | } | |
5795 | else | |
5796 | { | |
5797 | if ((ctype_isRealNumeric (tr1) && ctype_isRealPointer (tr2)) || | |
5798 | (ctype_isRealPointer (tr1) && ctype_isRealNumeric (tr2))) | |
5799 | { | |
5800 | voptgenerror | |
5801 | (FLG_PTRNUMCOMPARE, | |
5802 | message ("Comparison of pointer and numeric (%t, %t): %s", | |
5803 | te1, te2, exprNode_unparse (ret)), | |
5804 | e1->loc); | |
5805 | } | |
5806 | else | |
5807 | { | |
5808 | (void) checkNumerics (tr1, tr2, te1, te2, e1, e2, op); | |
5809 | } | |
5810 | tret = ctype_bool; | |
5811 | } | |
5812 | ||
5813 | /* certain comparisons on unsigned's and zero look suspicious */ | |
5814 | ||
5815 | if (opid == TLT || opid == LE_OP || opid == GE_OP) | |
5816 | { | |
5817 | if ((ctype_isUnsigned (tr1) && exprNode_isZero (e2)) | |
5818 | || (ctype_isUnsigned (tr2) && exprNode_isZero (e1))) | |
5819 | { | |
5820 | voptgenerror | |
5821 | (FLG_UNSIGNEDCOMPARE, | |
5822 | message ("Comparison of unsigned value involving zero: %s", | |
5823 | exprNode_unparse (ret)), | |
5824 | e1->loc); | |
5825 | } | |
5826 | } | |
5827 | ||
5828 | /* EQ_OP should NOT be used with booleans (unless one is FALSE) */ | |
5829 | ||
5830 | if ((opid == EQ_OP || opid == NE_OP) && | |
5831 | ctype_isDirectBool (tr1) && ctype_isDirectBool (tr2)) | |
5832 | { | |
5833 | /* | |
5834 | ** is one a variable? | |
5835 | */ | |
5836 | ||
5837 | if (uentry_isVariable (exprNode_getUentry (e1)) | |
5838 | || uentry_isVariable (exprNode_getUentry (e2))) | |
5839 | { | |
5840 | /* | |
5841 | ** comparisons with FALSE are okay | |
5842 | */ | |
5843 | ||
5844 | if (exprNode_isFalseConstant (e1) | |
5845 | || exprNode_isFalseConstant (e2)) | |
5846 | { | |
5847 | ; | |
5848 | } | |
5849 | else | |
5850 | { | |
5851 | voptgenerror | |
5852 | (FLG_BOOLCOMPARE, | |
5853 | message | |
5854 | ("Use of %q with %s variables (risks inconsistency because " | |
5855 | "of multiple true values): %s", | |
5856 | cstring_makeLiteral ((opid == EQ_OP) ? "==" : "!="), | |
5857 | context_printBoolName (), exprNode_unparse (ret)), | |
5858 | e1->loc); | |
5859 | } | |
5860 | } | |
5861 | } | |
5862 | break; | |
5863 | ||
5864 | case AND_OP: /* bool, bool -> bool */ | |
5865 | case OR_OP: | |
5866 | ||
5867 | if (ctype_isForceRealBool (&tr1) && ctype_isForceRealBool (&tr2)) | |
5868 | { | |
5869 | ; | |
5870 | } | |
5871 | else | |
5872 | { | |
5873 | if (context_maybeSet (FLG_BOOLOPS)) | |
5874 | { | |
5875 | if (!ctype_isRealBool (te1) && !ctype_isRealBool (te2)) | |
5876 | { | |
5877 | if (ctype_sameName (te1, te2)) | |
5878 | { | |
5879 | voptgenerror | |
5880 | (FLG_BOOLOPS, | |
5881 | message ("Operands of %s are non-boolean (%t): %s", | |
5882 | lltok_unparse (op), te1, | |
5883 | exprNode_unparse (ret)), | |
5884 | e1->loc); | |
5885 | } | |
5886 | else | |
5887 | { | |
5888 | voptgenerror | |
5889 | (FLG_BOOLOPS, | |
5890 | message | |
5891 | ("Operands of %s are non-booleans (%t, %t): %s", | |
5892 | lltok_unparse (op), te1, te2, exprNode_unparse (ret)), | |
5893 | e1->loc); | |
5894 | } | |
5895 | } | |
5896 | else if (!ctype_isRealBool (te1)) | |
5897 | { | |
5898 | voptgenerror | |
5899 | (FLG_BOOLOPS, | |
5900 | message ("Left operand of %s is non-boolean (%t): %s", | |
5901 | lltok_unparse (op), te1, exprNode_unparse (ret)), | |
5902 | e1->loc); | |
5903 | } | |
5904 | else if (!ctype_isRealBool (te2)) | |
5905 | { | |
5906 | voptgenerror | |
5907 | (FLG_BOOLOPS, | |
5908 | message ("Right operand of %s is non-boolean (%t): %s", | |
5909 | lltok_unparse (op), te2, exprNode_unparse (ret)), | |
5910 | e2->loc); | |
5911 | } | |
5912 | else | |
5913 | { | |
5914 | ; | |
5915 | } | |
5916 | } | |
5917 | tret = ctype_bool; | |
5918 | } | |
5919 | break; | |
5920 | default: { | |
5921 | llfatalbug | |
5922 | (cstring_makeLiteral | |
5923 | ("There has been a problem in the parser. This is believed to result " | |
5924 | "from a problem with bison v. 1.25. Please try rebuidling Splint " | |
5925 | "using the pre-compiled grammar files by commenting out the " | |
5926 | "BISON= line in the top-level Makefile.")); | |
5927 | } | |
5928 | } | |
5929 | } | |
5930 | ||
5931 | DPRINTF (("Return type: %s", ctype_unparse (tret))); | |
5932 | ret->typ = tret; | |
5933 | ||
5934 | exprNode_checkUse (ret, e1->sref, e1->loc); | |
5935 | exprNode_mergeUSs (ret, e2); | |
5936 | exprNode_checkUse (ret, e2->sref, e2->loc); | |
5937 | ||
5938 | return ret; | |
5939 | } | |
5940 | ||
5941 | /*@only@*/ exprNode | |
5942 | exprNode_op (/*@only@*/ exprNode e1, /*@keep@*/ exprNode e2, | |
5943 | /*@only@*/ lltok op) | |
5944 | { | |
5945 | exprNode ret; | |
5946 | ||
5947 | checkMacroParen (e1); | |
5948 | checkMacroParen (e2); | |
5949 | ||
5950 | if (evaluationOrderUndefined (op) && context_maybeSet (FLG_EVALORDER)) | |
5951 | { | |
5952 | checkExpressionDefined (e1, e2, op); | |
5953 | } | |
5954 | ||
5955 | ret = exprNode_makeOp (e1, e2, op); | |
5956 | return (ret); | |
5957 | } | |
5958 | ||
5959 | static | |
5960 | void exprNode_checkAssignMod (exprNode e1, exprNode ret) | |
5961 | { | |
5962 | /* | |
5963 | ** This is somewhat bogus! | |
5964 | ** | |
5965 | ** Assigning to a nested observer in a non-observer datatype | |
5966 | ** should not produce an error. | |
5967 | */ | |
5968 | ||
5969 | sRef ref = exprNode_getSref (e1); | |
5970 | ||
5971 | DPRINTF (("Check assign mod: %s", | |
5972 | sRef_unparseFull (ref))); | |
5973 | ||
5974 | if (sRef_isObserver (ref) | |
5975 | || ((sRef_isFileStatic (ref) || sRef_isFileOrGlobalScope (ref)) | |
5976 | && ctype_isArray (ctype_realType (sRef_getType (ref))))) | |
5977 | { | |
5978 | sRef base = sRef_getBase (ref); | |
5979 | ||
5980 | if (sRef_isValid (base) && sRef_isObserver (base)) | |
5981 | { | |
5982 | exprNode_checkModify (e1, ret); | |
5983 | } | |
5984 | else | |
5985 | { | |
5986 | exprNode_checkModifyVal (e1, ret); | |
5987 | } | |
5988 | } | |
5989 | else | |
5990 | { | |
5991 | exprNode_checkModify (e1, ret); | |
5992 | } | |
5993 | } | |
5994 | ||
5995 | exprNode | |
5996 | exprNode_assign (/*@only@*/ exprNode e1, | |
5997 | /*@only@*/ exprNode e2, /*@only@*/ lltok op) | |
5998 | { | |
5999 | bool isalloc = FALSE; | |
6000 | bool isjustalloc = FALSE; | |
6001 | bool noalias = FALSE; | |
6002 | exprNode ret; | |
6003 | ||
6004 | DPRINTF (("%s [%s] <- %s [%s]", | |
6005 | exprNode_unparse (e1), | |
6006 | ctype_unparse (e1->typ), | |
6007 | exprNode_unparse (e2), | |
6008 | ctype_unparse (e2->typ))); | |
6009 | ||
6010 | if (lltok_getTok (op) != TASSIGN) | |
6011 | { | |
6012 | ret = exprNode_makeOp (e1, e2, op); | |
6013 | ||
6014 | DPRINTF (("Here goes: %s %s", | |
6015 | ctype_unparse (e1->typ), | |
6016 | ctype_unparse (e2->typ))); | |
6017 | ||
6018 | if (ctype_isNumeric (e2->typ) | |
6019 | || ctype_isNumeric (e1->typ)) | |
6020 | { | |
6021 | /* Its a pointer arithmetic expression like ptr += i */ | |
6022 | noalias = TRUE; | |
6023 | } | |
6024 | } | |
6025 | else | |
6026 | { | |
6027 | ret = exprNode_createPartialCopy (e1); | |
6028 | ret->kind = XPR_ASSIGN; | |
6029 | ret->edata = exprData_makeOp (e1, e2, op); | |
6030 | ||
6031 | if (!exprNode_isError (e2)) | |
6032 | { | |
6033 | ret->sets = sRefSet_union (ret->sets, e2->sets); | |
6034 | ret->msets = sRefSet_union (ret->msets, e2->msets); | |
6035 | ret->uses = sRefSet_union (ret->uses, e2->uses); | |
6036 | } | |
6037 | } | |
6038 | ||
6039 | checkExpressionDefined (e1, e2, op); | |
6040 | ||
6041 | if (exprNode_isError (e1)) | |
6042 | { | |
6043 | if (!exprNode_isError (e2)) | |
6044 | { | |
6045 | ret->loc = fileloc_update (ret->loc, e2->loc); | |
6046 | } | |
6047 | else | |
6048 | { | |
6049 | ret->loc = fileloc_update (ret->loc, g_currentloc); | |
6050 | } | |
6051 | } | |
6052 | ||
6053 | if (!exprNode_isError (e2)) | |
6054 | { | |
6055 | checkMacroParen (e2); | |
6056 | } | |
6057 | ||
6058 | if (exprNode_isDefined (e1)) | |
6059 | { | |
6060 | if (sRef_isMacroParamRef (e1->sref)) | |
6061 | { | |
6062 | if (context_inIterDef ()) | |
6063 | { | |
6064 | uentry ue = sRef_getUentry (e1->sref); | |
6065 | ||
6066 | if (uentry_isYield (ue)) | |
6067 | { | |
6068 | ; | |
6069 | } | |
6070 | else | |
6071 | { | |
6072 | if (fileloc_isDefined (e1->loc)) | |
6073 | { | |
6074 | voptgenerror | |
6075 | (FLG_MACROPARAMS, | |
6076 | message ("Assignment to non-yield iter parameter: %q", | |
6077 | sRef_unparse (e1->sref)), | |
6078 | e1->loc); | |
6079 | } | |
6080 | else | |
6081 | { | |
6082 | voptgenerror | |
6083 | (FLG_MACROPARAMS, | |
6084 | message ("Assignment to non-yield iter parameter: %q", | |
6085 | sRef_unparse (e1->sref)), | |
6086 | g_currentloc); | |
6087 | } | |
6088 | } | |
6089 | } | |
6090 | else | |
6091 | { | |
6092 | if (fileloc_isDefined (e1->loc)) | |
6093 | { | |
6094 | voptgenerror | |
6095 | (FLG_MACROASSIGN, | |
6096 | message ("Assignment to macro parameter: %q", | |
6097 | sRef_unparse (e1->sref)), | |
6098 | e1->loc); | |
6099 | } | |
6100 | else | |
6101 | { | |
6102 | voptgenerror | |
6103 | (FLG_MACROASSIGN, | |
6104 | message ("Assignment to macro parameter: %q", | |
6105 | sRef_unparse (e1->sref)), | |
6106 | g_currentloc); | |
6107 | } | |
6108 | ||
6109 | exprNode_checkAssignMod (e1, ret); /* evans 2001-07-22 */ | |
6110 | } | |
6111 | } | |
6112 | else | |
6113 | { | |
6114 | exprNode_checkAssignMod (e1, ret); | |
6115 | } | |
6116 | ||
6117 | if (exprNode_isDefined (e2)) | |
6118 | { | |
6119 | if (lltok_getTok (op) == TASSIGN) | |
6120 | { | |
6121 | ctype te1 = exprNode_getType (e1); | |
6122 | ctype te2 = exprNode_getType (e2); | |
6123 | ||
6124 | if (!ctype_forceMatch (te1, te2)) | |
6125 | { | |
6126 | if (exprNode_matchLiteral (te1, e2)) | |
6127 | { | |
6128 | ; | |
6129 | } | |
6130 | else | |
6131 | { | |
6132 | (void) gentypeerror | |
6133 | (te2, e2, te1, e1, | |
6134 | message ("Assignment of %t to %t: %s %s %s", | |
6135 | te2, te1, exprNode_unparse (e1), | |
6136 | lltok_unparse (op), | |
6137 | exprNode_unparse (e2)), | |
6138 | e1->loc); | |
6139 | } | |
6140 | } | |
6141 | } | |
6142 | ||
6143 | exprNode_mergeUSs (ret, e2); | |
6144 | exprNode_checkUse (ret, e2->sref, e2->loc); | |
6145 | ||
6146 | DPRINTF (("Do assign! %s %s", exprNode_unparse (e1), exprNode_unparse (e2))); | |
6147 | if (noalias) | |
6148 | { | |
6149 | ; | |
6150 | } | |
6151 | else | |
6152 | { | |
6153 | doAssign (e1, e2, FALSE); | |
6154 | } | |
6155 | ||
6156 | ret->sref = e1->sref; | |
6157 | } | |
6158 | else | |
6159 | { | |
6160 | if (exprNode_isDefined (e2)) | |
6161 | { | |
6162 | exprNode_mergeUSs (ret, e2); | |
6163 | exprNode_checkUse (ret, e2->sref, e2->loc); | |
6164 | } | |
6165 | } | |
6166 | ||
6167 | if (sRef_isPointer (e1->sref) && !sRef_isMacroParamRef (e1->sref)) | |
6168 | { | |
6169 | exprNode_checkUse (ret, sRef_getBase (e1->sref), e1->loc); | |
6170 | } | |
6171 | ||
6172 | isjustalloc = sRef_isJustAllocated (e1->sref); | |
6173 | isalloc = sRef_isAllocated (e1->sref); | |
6174 | ||
6175 | if (sRef_isField (e1->sref)) | |
6176 | { | |
6177 | sRef root = sRef_getRootBase (sRef_getBase (e1->sref)); | |
6178 | ||
6179 | if (!sRef_isAllocated (root) && !sRef_isMacroParamRef (root)) | |
6180 | { | |
6181 | exprNode_checkUse (ret, root, e1->loc); | |
6182 | } | |
6183 | ||
6184 | } | |
6185 | ||
6186 | /* | |
6187 | ** be careful! this defines e1->sref. | |
6188 | */ | |
6189 | ||
6190 | /* evans 2001-07-22: removed if (!sRef_isMacroParamRef (e1->sref)) */ | |
6191 | ||
6192 | DPRINTF (("Setting: %s -> %s", exprNode_unparse (ret), sRef_unparse (e1->sref))); | |
6193 | exprNode_checkSet (ret, e1->sref); | |
6194 | ||
6195 | if (isjustalloc) | |
6196 | { | |
6197 | sRef_setAllocatedComplete (e1->sref, exprNode_isDefined (e2) | |
6198 | ? e2->loc : e1->loc); | |
6199 | } | |
6200 | else | |
6201 | { | |
6202 | if (isalloc) | |
6203 | { | |
6204 | sRef_setAllocatedShallowComplete (e1->sref, exprNode_loc (e2)); | |
6205 | } | |
6206 | } | |
6207 | } | |
6208 | ||
6209 | return ret; | |
6210 | } | |
6211 | ||
6212 | exprNode | |
6213 | exprNode_cond (/*@keep@*/ exprNode pred, /*@keep@*/ exprNode ifclause, | |
6214 | /*@keep@*/ exprNode elseclause) | |
6215 | { | |
6216 | exprNode ret; | |
6217 | ||
6218 | if (!exprNode_isError (pred)) | |
6219 | { | |
6220 | ret = exprNode_createPartialCopy (pred); | |
6221 | checkMacroParen (pred); | |
6222 | exprNode_checkPred (cstring_makeLiteralTemp ("conditional"), pred); | |
6223 | ||
6224 | if (!exprNode_isError (ifclause)) | |
6225 | { | |
6226 | checkMacroParen (ifclause); /* update macro counts! */ | |
6227 | ||
6228 | if (!exprNode_isError (elseclause)) | |
6229 | { | |
6230 | checkMacroParen (elseclause); | |
6231 | ||
6232 | if (!exprNode_matchTypes (ifclause, elseclause)) | |
6233 | { | |
6234 | if (gentypeerror | |
6235 | (exprNode_getType (ifclause), | |
6236 | ifclause, | |
6237 | exprNode_getType (elseclause), | |
6238 | elseclause, | |
6239 | message ("Conditional clauses are not of same type: " | |
6240 | "%s (%t), %s (%t)", | |
6241 | exprNode_unparse (ifclause), | |
6242 | exprNode_getType (ifclause), | |
6243 | exprNode_unparse (elseclause), | |
6244 | exprNode_getType (elseclause)), | |
6245 | ifclause->loc)) | |
6246 | { | |
6247 | ret->sref = sRef_undefined; | |
6248 | ret->typ = ctype_unknown; | |
6249 | } | |
6250 | } | |
6251 | else | |
6252 | { | |
6253 | /* for now...should merge the states */ | |
6254 | ret->sref = ifclause->sref; | |
6255 | ret->typ = ifclause->typ; | |
6256 | ||
6257 | if (exprNode_isNullValue (ifclause)) | |
6258 | { | |
6259 | ret->typ = elseclause->typ; | |
6260 | } | |
6261 | } | |
6262 | ||
6263 | exprNode_checkUse (ret, pred->sref, pred->loc); | |
6264 | exprNode_checkUse (ifclause, ifclause->sref, ifclause->loc); | |
6265 | exprNode_checkUse (elseclause, elseclause->sref, elseclause->loc); | |
6266 | ||
6267 | exprNode_mergeCondUSs (ret, ifclause, elseclause); | |
6268 | ||
6269 | } | |
6270 | else | |
6271 | { | |
6272 | ret->typ = ifclause->typ; | |
6273 | ||
6274 | exprNode_checkUse (pred, pred->sref, pred->loc); | |
6275 | exprNode_checkUse (ifclause, ifclause->sref, ifclause->loc); | |
6276 | ||
6277 | exprNode_mergeCondUSs (ret, ifclause, exprNode_undefined); | |
6278 | } | |
6279 | } | |
6280 | else | |
6281 | { | |
6282 | if (!exprNode_isError (elseclause)) | |
6283 | { | |
6284 | ret->typ = elseclause->typ; | |
6285 | ||
6286 | exprNode_checkUse (pred, pred->sref, pred->loc); | |
6287 | exprNode_checkUse (elseclause, elseclause->sref, elseclause->loc); | |
6288 | ||
6289 | exprNode_mergeCondUSs (ret, exprNode_undefined, elseclause); | |
6290 | } | |
6291 | } | |
6292 | } | |
6293 | else /* pred is error */ | |
6294 | { | |
6295 | if (!exprNode_isError (ifclause)) | |
6296 | { | |
6297 | ret = exprNode_createSemiCopy (ifclause); | |
6298 | ||
6299 | checkMacroParen (ifclause); /* update macro counts! */ | |
6300 | ||
6301 | if (!exprNode_isError (elseclause)) | |
6302 | { | |
6303 | checkMacroParen (elseclause); | |
6304 | ||
6305 | ret->typ = ifclause->typ; | |
6306 | ||
6307 | if (!ctype_forceMatch (ifclause->typ, elseclause->typ)) | |
6308 | { | |
6309 | if (gentypeerror | |
6310 | (exprNode_getType (ifclause), | |
6311 | ifclause, | |
6312 | exprNode_getType (elseclause), | |
6313 | elseclause, | |
6314 | message ("Conditional clauses are not of same type: " | |
6315 | "%s (%t), %s (%t)", | |
6316 | exprNode_unparse (ifclause), | |
6317 | exprNode_getType (ifclause), | |
6318 | exprNode_unparse (elseclause), | |
6319 | exprNode_getType (elseclause)), | |
6320 | ifclause->loc)) | |
6321 | { | |
6322 | ret->typ = ctype_unknown; | |
6323 | } | |
6324 | } | |
6325 | ||
6326 | exprNode_checkUse (ifclause, ifclause->sref, ifclause->loc); | |
6327 | exprNode_checkUse (elseclause, elseclause->sref, elseclause->loc); | |
6328 | ||
6329 | exprNode_mergeCondUSs (ret, ifclause, elseclause); | |
6330 | } | |
6331 | } | |
6332 | else if (!exprNode_isError (elseclause)) /* pred, if errors */ | |
6333 | { | |
6334 | ret = exprNode_createSemiCopy (ifclause); | |
6335 | ||
6336 | ret->typ = elseclause->typ; | |
6337 | checkMacroParen (elseclause); | |
6338 | ||
6339 | exprNode_checkUse (elseclause, elseclause->sref, elseclause->loc); | |
6340 | exprNode_mergeCondUSs (ret, exprNode_undefined, elseclause); | |
6341 | } | |
6342 | else /* all errors! */ | |
6343 | { | |
6344 | ret = exprNode_createLoc (ctype_unknown, fileloc_copy (g_currentloc)); | |
6345 | } | |
6346 | } | |
6347 | ||
6348 | ret->kind = XPR_COND; | |
6349 | ret->edata = exprData_makeCond (pred, ifclause, elseclause); | |
6350 | ||
6351 | if (exprNode_isDefined (ifclause) && exprNode_isDefined (elseclause)) | |
6352 | { | |
6353 | exprNode_combineControl (ret, ifclause, elseclause); | |
6354 | } | |
6355 | ||
6356 | return (ret); | |
6357 | } | |
6358 | ||
6359 | exprNode | |
6360 | exprNode_vaArg (/*@only@*/ lltok tok, /*@only@*/ exprNode arg, /*@only@*/ qtype qt) | |
6361 | { | |
6362 | ctype totype = qtype_getType (qt); | |
6363 | exprNode ret = | |
6364 | exprNode_createPartialLocCopy (arg, fileloc_copy (lltok_getLoc (tok))); | |
6365 | ctype targ; | |
6366 | ||
6367 | /* | |
6368 | ** check use of va_arg : <valist>, type -> type | |
6369 | */ | |
6370 | ||
6371 | if (exprNode_isError (arg)) | |
6372 | { | |
6373 | } | |
6374 | else | |
6375 | { | |
6376 | targ = exprNode_getType (arg); | |
6377 | ||
6378 | /* | |
6379 | ** arg should have be a pointer | |
6380 | */ | |
6381 | ||
6382 | if (!ctype_isUA (targ) || | |
6383 | (!usymId_equal (ctype_typeId (targ), | |
6384 | usymtab_getTypeId (cstring_makeLiteralTemp ("va_list"))))) | |
6385 | { | |
6386 | voptgenerror | |
6387 | (FLG_TYPE, | |
6388 | message ("First argument to va_arg is not a va_list (type %t): %s", | |
6389 | targ, exprNode_unparse (arg)), | |
6390 | arg->loc); | |
6391 | } | |
6392 | ||
6393 | exprNode_checkSet (ret, arg->sref); | |
6394 | } | |
6395 | ||
6396 | /* | |
6397 | ** return type is totype | |
6398 | */ | |
6399 | ||
6400 | ret->typ = totype; | |
6401 | ret->kind = XPR_VAARG; | |
6402 | ret->edata = exprData_makeCast (tok, arg, qt); | |
6403 | ||
6404 | return (ret); | |
6405 | } | |
6406 | ||
6407 | exprNode exprNode_labelMarker (/*@only@*/ cstring label) | |
6408 | { | |
6409 | exprNode ret = exprNode_createPlain (ctype_undefined); | |
6410 | ret->kind = XPR_LABEL; | |
6411 | ret->edata = exprData_makeLiteral (label); | |
6412 | ret->isJumpPoint = TRUE; | |
6413 | ||
6414 | return (ret); /* for now, ignore label */ | |
6415 | } | |
6416 | ||
6417 | exprNode exprNode_notReached (/*@returned@*/ exprNode stmt) | |
6418 | { | |
6419 | if (exprNode_isDefined (stmt)) | |
6420 | { | |
6421 | stmt->isJumpPoint = TRUE; | |
6422 | ||
6423 | /* This prevent stray no return path errors, etc. */ | |
6424 | stmt->exitCode = XK_MUSTEXIT; | |
6425 | } | |
6426 | ||
6427 | return (stmt); | |
6428 | } | |
6429 | ||
6430 | bool exprNode_isDefaultMarker (exprNode e) | |
6431 | { | |
6432 | if (exprNode_isDefined (e)) | |
6433 | { | |
6434 | return (e->kind == XPR_DEFAULT || e->kind == XPR_FTDEFAULT); | |
6435 | } | |
6436 | ||
6437 | return FALSE; | |
6438 | } | |
6439 | ||
6440 | bool exprNode_isCaseMarker (exprNode e) | |
6441 | { | |
6442 | if (exprNode_isDefined (e)) | |
6443 | { | |
6444 | return (e->kind == XPR_FTCASE || e->kind == XPR_CASE); | |
6445 | } | |
6446 | ||
6447 | return FALSE; | |
6448 | } | |
6449 | ||
6450 | bool exprNode_isLabelMarker (exprNode e) | |
6451 | { | |
6452 | if (exprNode_isDefined (e)) | |
6453 | { | |
6454 | return (e->kind == XPR_LABEL); | |
6455 | } | |
6456 | ||
6457 | return FALSE; | |
6458 | } | |
6459 | ||
6460 | exprNode exprNode_caseMarker (/*@only@*/ exprNode test, bool fallThrough) | |
6461 | { | |
6462 | exprNode ret = exprNode_createPartialCopy (test); | |
6463 | ||
6464 | ret->kind = fallThrough ? XPR_FTCASE : XPR_CASE; | |
6465 | ||
6466 | if (exprNode_isError (test)) { | |
6467 | return ret; | |
6468 | } | |
6469 | ||
6470 | exprNode_checkUse (ret, test->sref, test->loc); | |
6471 | ||
6472 | usymtab_setExitCode (ret->exitCode); | |
6473 | ||
6474 | if (ret->mustBreak) | |
6475 | { | |
6476 | usymtab_setMustBreak (); | |
6477 | } | |
6478 | ||
6479 | ret->edata = exprData_makeSingle (test); | |
6480 | ret->isJumpPoint = TRUE; | |
6481 | ||
6482 | return ret; | |
6483 | } | |
6484 | ||
6485 | # if 0 | |
6486 | exprNode exprNode_caseStatement (/*@only@*/ exprNode test, /*@only@*/ exprNode stmt, bool fallThrough) | |
6487 | { | |
6488 | exprNode ret = exprNode_createPartialCopy (test); | |
6489 | ||
6490 | ret->kind = fallThrough ? XPR_FTCASE : XPR_CASE; | |
6491 | ret->edata = exprData_makePair (test, stmt); | |
6492 | ret->isJumpPoint = TRUE; | |
6493 | ||
6494 | if (exprNode_isError (test)) | |
6495 | { | |
6496 | return ret; | |
6497 | } | |
6498 | ||
6499 | exprNode_checkUse (ret, test->sref, test->loc); | |
6500 | ||
6501 | if (exprNode_isError (stmt)) | |
6502 | { | |
6503 | return ret; | |
6504 | } | |
6505 | ||
6506 | exprNode_mergeUSs (ret, stmt); | |
6507 | ||
6508 | ret->exitCode = stmt->exitCode; | |
6509 | ret->mustBreak = stmt->mustBreak; | |
6510 | ret->canBreak = stmt->canBreak; | |
6511 | ||
6512 | usymtab_setExitCode (ret->exitCode); | |
6513 | ||
6514 | if (ret->mustBreak) | |
6515 | { | |
6516 | usymtab_setMustBreak (); | |
6517 | } | |
6518 | ||
6519 | return ret; | |
6520 | } | |
6521 | # endif | |
6522 | ||
6523 | /*@notnull@*/ /*@only@*/ exprNode | |
6524 | exprNode_defaultMarker (/*@only@*/ lltok def, bool fallThrough) | |
6525 | { | |
6526 | exprNode ret = exprNode_createTok (def); | |
6527 | ||
6528 | ret->isJumpPoint = TRUE; | |
6529 | ret->kind = fallThrough ? XPR_FTDEFAULT : XPR_DEFAULT; | |
6530 | return (ret); | |
6531 | } | |
6532 | ||
6533 | bool | |
6534 | exprNode_mayEscape (exprNode e) | |
6535 | { | |
6536 | if (exprNode_isDefined (e)) | |
6537 | { | |
6538 | return exitkind_couldEscape (e->exitCode); | |
6539 | } | |
6540 | return FALSE; | |
6541 | } | |
6542 | ||
6543 | static bool | |
6544 | exprNode_mustBreak (exprNode e) | |
6545 | { | |
6546 | if (exprNode_isDefined (e)) | |
6547 | { | |
6548 | return e->mustBreak; | |
6549 | } | |
6550 | ||
6551 | return FALSE; | |
6552 | } | |
6553 | ||
6554 | bool | |
6555 | exprNode_mustEscape (exprNode e) | |
6556 | { | |
6557 | if (exprNode_isDefined (e)) | |
6558 | { | |
6559 | return exitkind_mustEscape (e->exitCode) || exprNode_mustBreak (e); | |
6560 | } | |
6561 | ||
6562 | return FALSE; | |
6563 | } | |
6564 | ||
6565 | bool | |
6566 | exprNode_errorEscape (exprNode e) | |
6567 | { | |
6568 | if (exprNode_isDefined (e)) | |
6569 | { | |
6570 | return exitkind_isError (e->exitCode); | |
6571 | } | |
6572 | ||
6573 | return FALSE; | |
6574 | } | |
6575 | ||
6576 | exprNode exprNode_concat (/*@only@*/ exprNode e1, /*@only@*/ exprNode e2) | |
6577 | { | |
6578 | exprNode ret = exprNode_createPartialCopy (e1); | |
6579 | ||
6580 | DPRINTF (("Concat: %s / %s", exprNode_unparse (e1), exprNode_unparse (e2))); | |
6581 | ||
6582 | ret->edata = exprData_makePair (e1, e2); | |
6583 | ret->kind = XPR_STMTLIST; | |
6584 | ||
6585 | if (exprNode_isDefined (e1)) | |
6586 | { | |
6587 | ret->isJumpPoint = e1->isJumpPoint; | |
6588 | ret->canBreak = e1->canBreak; | |
6589 | } | |
6590 | else | |
6591 | { | |
6592 | if (exprNode_isDefined (e2)) | |
6593 | { | |
6594 | ret->loc = fileloc_update (ret->loc, e2->loc); | |
6595 | } | |
6596 | } | |
6597 | ||
6598 | if (exprNode_isDefined (e2)) | |
6599 | { | |
6600 | ret->exitCode = e2->exitCode; | |
6601 | ret->mustBreak = e2->mustBreak; | |
6602 | if (e2->canBreak) ret->canBreak = TRUE; | |
6603 | } | |
6604 | ||
6605 | /* | |
6606 | ** if e1 must return, then e2 is unreachable! | |
6607 | */ | |
6608 | ||
6609 | if (exprNode_isDefined (e1) && exprNode_isDefined (e2)) | |
6610 | { | |
6611 | if ((exprNode_mustEscape (e1) || exprNode_mustBreak (e1)) | |
6612 | && !(e2->isJumpPoint)) | |
6613 | { | |
6614 | if (context_getFlag (FLG_UNREACHABLE)) | |
6615 | { | |
6616 | exprNode nr = e2; | |
6617 | ||
6618 | if (e2->kind == XPR_STMT) | |
6619 | { | |
6620 | nr = exprData_getUopNode (e2->edata); | |
6621 | } | |
6622 | ||
6623 | if ((nr->kind == XPR_TOK | |
6624 | && lltok_isSemi (exprData_getTok (nr->edata)))) | |
6625 | { | |
6626 | /* okay to have unreachable ";" */ | |
6627 | ret->exitCode = XK_MUSTEXIT; | |
6628 | ret->canBreak = TRUE; | |
6629 | } | |
6630 | else | |
6631 | { | |
6632 | if (optgenerror (FLG_UNREACHABLE, | |
6633 | message ("Unreachable code: %s", | |
6634 | exprNode_unparseFirst (nr)), | |
6635 | exprNode_loc (nr))) | |
6636 | { | |
6637 | ret->isJumpPoint = TRUE; | |
6638 | ret->mustBreak = FALSE; | |
6639 | ret->exitCode = XK_ERROR; | |
6640 | DPRINTF (("Jump point: %s", exprNode_unparse (ret))); | |
6641 | } | |
6642 | else | |
6643 | { | |
6644 | ret->exitCode = XK_MUSTEXIT; | |
6645 | ret->canBreak = TRUE; | |
6646 | } | |
6647 | ||
6648 | } | |
6649 | } | |
6650 | } | |
6651 | else | |
6652 | { | |
6653 | if ((e2->kind == XPR_CASE || e2->kind == XPR_DEFAULT)) | |
6654 | { | |
6655 | /* | |
6656 | ** We want a warning anytime we have: | |
6657 | ** case xxx: ... | |
6658 | ** yyy; <<<- no break or return | |
6659 | ** case zzz: ... | |
6660 | */ | |
6661 | ||
6662 | exprNode lastStmt = exprNode_lastStatement (e1); | |
6663 | ||
6664 | if (exprNode_isDefined (lastStmt) | |
6665 | && !exprNode_mustEscape (lastStmt) | |
6666 | && !exprNode_mustBreak (lastStmt) | |
6667 | && !exprNode_isCaseMarker (lastStmt) | |
6668 | && !exprNode_isDefaultMarker (lastStmt) | |
6669 | && !exprNode_isLabelMarker (lastStmt)) | |
6670 | { | |
6671 | voptgenerror (FLG_CASEBREAK, | |
6672 | cstring_makeLiteral | |
6673 | ("Fall through case (no preceding break)"), | |
6674 | e2->loc); | |
6675 | } | |
6676 | } | |
6677 | } | |
6678 | } | |
6679 | ||
6680 | exprNode_mergeUSs (ret, e2); | |
6681 | ||
6682 | usymtab_setExitCode (ret->exitCode); | |
6683 | ||
6684 | if (ret->mustBreak) | |
6685 | { | |
6686 | usymtab_setMustBreak (); | |
6687 | } | |
6688 | ||
6689 | return ret; | |
6690 | } | |
6691 | ||
6692 | exprNode exprNode_createTok (/*@only@*/ lltok t) | |
6693 | { | |
6694 | exprNode ret; /*@i23 if on same line, bad things happen...!@*/ | |
6695 | ret = exprNode_create (ctype_unknown); | |
6696 | ret->kind = XPR_TOK; | |
6697 | ret->edata = exprData_makeTok (t); | |
6698 | return ret; | |
6699 | } | |
6700 | ||
6701 | exprNode exprNode_statement (/*@only@*/ exprNode e, /*@only@*/ lltok t) | |
6702 | { | |
6703 | if (!exprNode_isError (e)) | |
6704 | { | |
6705 | exprNode_checkStatement(e); | |
6706 | } | |
6707 | ||
6708 | return (exprNode_statementError (e, t)); | |
6709 | } | |
6710 | ||
6711 | static exprNode exprNode_statementError (/*@only@*/ exprNode e, /*@only@*/ lltok t) | |
6712 | { | |
6713 | exprNode ret = exprNode_createPartialCopy (e); | |
6714 | ||
6715 | if (!exprNode_isError (e)) | |
6716 | { | |
6717 | if (e->kind != XPR_ASSIGN) | |
6718 | { | |
6719 | exprNode_checkUse (ret, e->sref, e->loc); | |
6720 | } | |
6721 | ||
6722 | ret->exitCode = e->exitCode; | |
6723 | ret->canBreak = e->canBreak; | |
6724 | ret->mustBreak = e->mustBreak; | |
6725 | } | |
6726 | ||
6727 | ret->edata = exprData_makeUop (e, t); | |
6728 | ret->kind = XPR_STMT; | |
6729 | ||
6730 | return ret; | |
6731 | } | |
6732 | ||
6733 | exprNode exprNode_checkExpr (/*@returned@*/ exprNode e) | |
6734 | { | |
6735 | if (!exprNode_isError (e)) | |
6736 | { | |
6737 | if (e->kind != XPR_ASSIGN) | |
6738 | { | |
6739 | exprNode_checkUse (e, e->sref, e->loc); | |
6740 | } | |
6741 | } | |
6742 | ||
6743 | return e; | |
6744 | } | |
6745 | ||
6746 | void exprNode_produceGuards (exprNode pred) | |
6747 | { | |
6748 | if (!exprNode_isError (pred)) | |
6749 | { | |
6750 | if (ctype_isRealPointer (pred->typ)) | |
6751 | { | |
6752 | pred->guards = guardSet_addTrueGuard (pred->guards, pred->sref); | |
6753 | } | |
6754 | ||
6755 | exprNode_checkUse (pred, pred->sref, pred->loc); | |
6756 | exprNode_resetSref (pred); | |
6757 | } | |
6758 | } | |
6759 | ||
6760 | exprNode exprNode_makeBlock (/*@only@*/ exprNode e) | |
6761 | { | |
6762 | exprNode ret = exprNode_createPartialCopy (e); | |
6763 | ||
6764 | if (!exprNode_isError (e)) | |
6765 | { | |
6766 | ret->exitCode = e->exitCode; | |
6767 | ret->canBreak = e->canBreak; | |
6768 | ret->mustBreak = e->mustBreak; | |
6769 | } | |
6770 | ||
6771 | ret->edata = exprData_makeSingle (e); | |
6772 | ret->kind = XPR_BLOCK; | |
6773 | return ret; | |
6774 | } | |
6775 | ||
6776 | bool exprNode_isBlock (exprNode e) | |
6777 | { | |
6778 | return (exprNode_isDefined (e) | |
6779 | && ((e)->kind == XPR_BLOCK)); | |
6780 | } | |
6781 | ||
6782 | bool exprNode_isAssign (exprNode e) | |
6783 | { | |
6784 | if (exprNode_isDefined (e)) | |
6785 | { | |
6786 | return (e->kind == XPR_ASSIGN); | |
6787 | } | |
6788 | ||
6789 | return FALSE; | |
6790 | } | |
6791 | ||
6792 | bool exprNode_isEmptyStatement (exprNode e) | |
6793 | { | |
6794 | return (exprNode_isDefined (e) | |
6795 | && (e->kind == XPR_TOK) | |
6796 | && (lltok_isSemi (exprData_getTok (e->edata)))); | |
6797 | } | |
6798 | ||
6799 | void exprNode_checkIfPred (exprNode pred) | |
6800 | { | |
6801 | exprNode_checkPred (cstring_makeLiteralTemp ("if"), pred); | |
6802 | } | |
6803 | ||
6804 | exprNode exprNode_if (/*@only@*/ exprNode pred, /*@only@*/ exprNode tclause) | |
6805 | { | |
6806 | exprNode ret; | |
6807 | bool emptyErr = FALSE; | |
6808 | ||
6809 | if (context_maybeSet (FLG_IFEMPTY)) | |
6810 | { | |
6811 | if (exprNode_isEmptyStatement (tclause)) | |
6812 | { | |
6813 | emptyErr = optgenerror (FLG_IFEMPTY, | |
6814 | cstring_makeLiteral | |
6815 | ("Body of if statement is empty"), | |
6816 | exprNode_loc (tclause)); | |
6817 | } | |
6818 | } | |
6819 | ||
6820 | if (!emptyErr && context_maybeSet (FLG_IFBLOCK)) | |
6821 | { | |
6822 | if (exprNode_isDefined (tclause) | |
6823 | && !exprNode_isBlock (tclause)) | |
6824 | { | |
6825 | voptgenerror (FLG_IFBLOCK, | |
6826 | message | |
6827 | ("Body of if statement is not a block: %s", | |
6828 | exprNode_unparse (tclause)), | |
6829 | exprNode_loc (tclause)); | |
6830 | } | |
6831 | } | |
6832 | ||
6833 | if (exprNode_isError (pred)) | |
6834 | { | |
6835 | if (exprNode_isError (tclause)) | |
6836 | { | |
6837 | ret = exprNode_createLoc (ctype_unknown, fileloc_copy (g_currentloc)); | |
6838 | } | |
6839 | else | |
6840 | { | |
6841 | ret = exprNode_createPartialCopy (tclause); | |
6842 | } | |
6843 | } | |
6844 | else | |
6845 | { | |
6846 | if (exprNode_mustEscape (pred)) | |
6847 | { | |
6848 | voptgenerror | |
6849 | (FLG_UNREACHABLE, | |
6850 | message ("Predicate always exits: %s", exprNode_unparse (pred)), | |
6851 | exprNode_loc (pred)); | |
6852 | } | |
6853 | ||
6854 | /*! exprNode_checkPred (cstring_makeLiteralTemp ("if"), pred); */ /*@i523@*/ | |
6855 | exprNode_checkUse (pred, pred->sref, pred->loc); | |
6856 | ||
6857 | if (!exprNode_isError (tclause)) | |
6858 | { | |
6859 | exprNode_mergeCondUSs (pred, tclause, exprNode_undefined); | |
6860 | } | |
6861 | ||
6862 | ret = exprNode_createPartialCopy (pred); | |
6863 | } | |
6864 | ||
6865 | ret->kind = XPR_IF; | |
6866 | ret->edata = exprData_makePair (pred, tclause); | |
6867 | ||
6868 | ret->exitCode = XK_UNKNOWN; | |
6869 | ||
6870 | if (exprNode_isDefined (tclause)) | |
6871 | { | |
6872 | ret->exitCode = exitkind_makeConditional (tclause->exitCode); | |
6873 | ret->canBreak = tclause->canBreak; | |
6874 | ret->sets = sRefSet_union (ret->sets, tclause->sets); | |
6875 | ret->msets = sRefSet_union (ret->msets, tclause->msets); | |
6876 | ret->uses = sRefSet_union (ret->uses, tclause->uses); | |
6877 | } | |
6878 | ||
6879 | ret->mustBreak = FALSE; | |
6880 | ||
6881 | return ret; | |
6882 | } | |
6883 | ||
6884 | exprNode exprNode_ifelse (/*@only@*/ exprNode pred, | |
6885 | /*@only@*/ exprNode tclause, | |
6886 | /*@only@*/ exprNode eclause) | |
6887 | { | |
6888 | exprNode ret; | |
6889 | bool tEmptyErr = FALSE; | |
6890 | bool eEmptyErr = FALSE; | |
6891 | ||
6892 | if (context_maybeSet (FLG_IFEMPTY)) | |
6893 | { | |
6894 | if (exprNode_isEmptyStatement (tclause)) | |
6895 | { | |
6896 | tEmptyErr = optgenerror | |
6897 | (FLG_IFEMPTY, | |
6898 | cstring_makeLiteral | |
6899 | ("Body of if clause of if statement is empty"), | |
6900 | exprNode_loc (tclause)); | |
6901 | } | |
6902 | ||
6903 | if (exprNode_isEmptyStatement (eclause)) | |
6904 | { | |
6905 | eEmptyErr = optgenerror | |
6906 | (FLG_IFEMPTY, | |
6907 | cstring_makeLiteral | |
6908 | ("Body of else clause of if statement is empty"), | |
6909 | exprNode_loc (eclause)); | |
6910 | } | |
6911 | } | |
6912 | ||
6913 | if (context_maybeSet (FLG_IFBLOCK)) | |
6914 | { | |
6915 | if (!tEmptyErr | |
6916 | && exprNode_isDefined (tclause) | |
6917 | && !exprNode_isBlock (tclause)) | |
6918 | { | |
6919 | voptgenerror (FLG_IFBLOCK, | |
6920 | message | |
6921 | ("Body of if clause of if statement is not a block: %s", | |
6922 | exprNode_unparse (tclause)), | |
6923 | exprNode_loc (tclause)); | |
6924 | } | |
6925 | ||
6926 | if (!eEmptyErr | |
6927 | && exprNode_isDefined (eclause) | |
6928 | && !exprNode_isBlock (eclause) | |
6929 | && !(eclause->kind == XPR_IF) | |
6930 | && !(eclause->kind == XPR_IFELSE)) | |
6931 | { | |
6932 | voptgenerror | |
6933 | (FLG_IFBLOCK, | |
6934 | message | |
6935 | ("Body of else clause of if statement is not a block: %s", | |
6936 | exprNode_unparse (eclause)), | |
6937 | exprNode_loc (eclause)); | |
6938 | } | |
6939 | } | |
6940 | ||
6941 | if (context_maybeSet (FLG_ELSEIFCOMPLETE)) | |
6942 | { | |
6943 | if (exprNode_isDefined (eclause) | |
6944 | && (eclause->kind == XPR_IF)) | |
6945 | { | |
6946 | voptgenerror (FLG_ELSEIFCOMPLETE, | |
6947 | message ("Incomplete else if logic (no final else): %s", | |
6948 | exprNode_unparse (eclause)), | |
6949 | exprNode_loc (eclause)); | |
6950 | } | |
6951 | } | |
6952 | ||
6953 | if (exprNode_isError (pred)) | |
6954 | { | |
6955 | if (exprNode_isError (tclause)) | |
6956 | { | |
6957 | if (exprNode_isError (eclause)) | |
6958 | { | |
6959 | ret = exprNode_createLoc (ctype_unknown, fileloc_copy (g_currentloc)); | |
6960 | } | |
6961 | else | |
6962 | { | |
6963 | ret = exprNode_createPartialCopy (eclause); | |
6964 | } | |
6965 | } | |
6966 | else | |
6967 | { | |
6968 | ret = exprNode_createPartialCopy (tclause); | |
6969 | } | |
6970 | } | |
6971 | else /* pred is okay */ | |
6972 | { | |
6973 | ret = exprNode_createPartialCopy (pred); | |
6974 | ||
6975 | if (exprNode_mustEscape (pred)) | |
6976 | { | |
6977 | voptgenerror | |
6978 | (FLG_UNREACHABLE, | |
6979 | message ("Predicate always exits: %s", exprNode_unparse (pred)), | |
6980 | exprNode_loc (pred)); | |
6981 | } | |
6982 | ||
6983 | /*@i3423 exprNode_checkPred (cstring_makeLiteralTemp ("if"), pred);*/ | |
6984 | exprNode_checkUse (ret, pred->sref, pred->loc); | |
6985 | ||
6986 | exprNode_mergeCondUSs (ret, tclause, eclause); | |
6987 | } | |
6988 | ||
6989 | ret->kind = XPR_IFELSE; | |
6990 | ret->edata = exprData_makeCond (pred, tclause, eclause); | |
6991 | ||
6992 | if (exprNode_isDefined (tclause) && exprNode_isDefined (eclause)) | |
6993 | { | |
6994 | exprNode_combineControl (ret, tclause, eclause); | |
6995 | ret->loc = fileloc_update (ret->loc, eclause->loc); | |
6996 | } | |
6997 | ||
6998 | return ret; | |
6999 | } | |
7000 | ||
7001 | /* | |
7002 | ** *allpaths <- TRUE iff all executions paths must go through the switch | |
7003 | */ | |
7004 | ||
7005 | static bool | |
7006 | checkSwitchExpr (exprNode test, /*@dependent@*/ exprNode e, /*@out@*/ bool *allpaths) | |
7007 | { | |
7008 | exprNodeSList el = exprNode_flatten (e); | |
7009 | bool mustReturn = TRUE; /* find a branch that doesn't */ | |
7010 | bool thisReturn = FALSE; | |
7011 | bool hasDefault = FALSE; | |
7012 | bool hasAllMembers = FALSE; | |
7013 | bool inSwitch = FALSE; | |
7014 | bool isEnumSwitch = FALSE; | |
7015 | bool canBreak = FALSE; | |
7016 | bool fallThrough = FALSE; | |
7017 | ctype ct = ctype_unknown; | |
7018 | enumNameSList usedEnums; | |
7019 | enumNameList enums; | |
7020 | ||
7021 | if (exprNode_isDefined (test)) | |
7022 | { | |
7023 | ctype ttype; | |
7024 | ||
7025 | ct = test->typ; | |
7026 | ttype = ctype_realType (ct); | |
7027 | ||
7028 | if (ctype_isEnum (ttype)) | |
7029 | { | |
7030 | isEnumSwitch = TRUE; | |
7031 | enums = ctype_elist (ttype); | |
7032 | usedEnums = enumNameSList_new (); | |
7033 | } | |
7034 | } | |
7035 | ||
7036 | exprNodeSList_elements (el, current) | |
7037 | { | |
7038 | if (exprNode_isDefined (current)) | |
7039 | { | |
7040 | switch (current->kind) | |
7041 | { | |
7042 | case XPR_FTDEFAULT: | |
7043 | case XPR_DEFAULT: | |
7044 | if (hasDefault) | |
7045 | { | |
7046 | voptgenerror | |
7047 | (FLG_DUPLICATECASES, | |
7048 | message ("Duplicate default cases in switch"), | |
7049 | exprNode_loc (current)); | |
7050 | } | |
7051 | /*@fallthrough@*/ | |
7052 | case XPR_FTCASE: | |
7053 | case XPR_CASE: | |
7054 | if (current->kind == XPR_DEFAULT || current->kind == XPR_FTDEFAULT) | |
7055 | { | |
7056 | hasDefault = TRUE; | |
7057 | } | |
7058 | else | |
7059 | { | |
7060 | if (isEnumSwitch) | |
7061 | { | |
7062 | exprNode st = exprData_getSingle (current->edata); | |
7063 | uentry ue = exprNode_getUentry (st); | |
7064 | ||
7065 | if (uentry_isValid (ue)) | |
7066 | { | |
7067 | cstring cname = uentry_rawName (ue); | |
7068 | ||
7069 | if (enumNameList_member (/*@-usedef@*/enums/*@=usedef@*/, cname)) | |
7070 | { | |
7071 | if (enumNameSList_member | |
7072 | (/*@-usedef@*/usedEnums/*@=usedef@*/, cname)) | |
7073 | { | |
7074 | voptgenerror | |
7075 | (FLG_DUPLICATECASES, | |
7076 | message ("Duplicate case in switch: %s", | |
7077 | cname), | |
7078 | current->loc); | |
7079 | } | |
7080 | else | |
7081 | { | |
7082 | enumNameSList_addh (usedEnums, cname); | |
7083 | } | |
7084 | } | |
7085 | else | |
7086 | { | |
7087 | voptgenerror | |
7088 | (FLG_TYPE, | |
7089 | message ("Case in switch not %s member: %s", | |
7090 | ctype_unparse (ct), cname), | |
7091 | current->loc); | |
7092 | } | |
7093 | } | |
7094 | } | |
7095 | } | |
7096 | ||
7097 | if (inSwitch && !fallThrough) | |
7098 | { | |
7099 | if (!thisReturn || canBreak) | |
7100 | { | |
7101 | mustReturn = FALSE; | |
7102 | } | |
7103 | } | |
7104 | ||
7105 | fallThrough = TRUE; | |
7106 | inSwitch = TRUE; | |
7107 | thisReturn = FALSE; | |
7108 | canBreak = FALSE; | |
7109 | /*@switchbreak@*/ break; | |
7110 | default: | |
7111 | thisReturn = thisReturn || exprNode_mustEscape (current); | |
7112 | canBreak = canBreak || current->canBreak; | |
7113 | if (canBreak) fallThrough = FALSE; | |
7114 | } | |
7115 | } | |
7116 | } end_exprNodeSList_elements; | |
7117 | ||
7118 | if (inSwitch) /* check the last one! */ | |
7119 | { | |
7120 | if (!thisReturn || canBreak) | |
7121 | { | |
7122 | mustReturn = FALSE; | |
7123 | } | |
7124 | } | |
7125 | ||
7126 | if (isEnumSwitch) | |
7127 | { | |
7128 | if (!hasDefault | |
7129 | && (enumNameSList_size (/*@-usedef@*/usedEnums/*@=usedef@*/) != | |
7130 | enumNameList_size (/*@-usedef@*/enums/*@=usedef@*/))) | |
7131 | { | |
7132 | enumNameSList unused = enumNameSList_subtract (enums, usedEnums); | |
7133 | ||
7134 | voptgenerror (FLG_MISSCASE, | |
7135 | message ("Missing case%s in switch: %q", | |
7136 | cstring_makeLiteralTemp | |
7137 | ((enumNameSList_size (unused) > 1) ? "s" : ""), | |
7138 | enumNameSList_unparse (unused)), | |
7139 | g_currentloc); | |
7140 | ||
7141 | enumNameSList_free (unused); | |
7142 | *allpaths = FALSE; /* evans 2002-01-01 */ | |
7143 | } | |
7144 | else | |
7145 | { | |
7146 | hasAllMembers = TRUE; | |
7147 | *allpaths = TRUE; | |
7148 | } | |
7149 | ||
7150 | enumNameSList_free (usedEnums); | |
7151 | } | |
7152 | else | |
7153 | { | |
7154 | *allpaths = hasDefault; | |
7155 | } | |
7156 | ||
7157 | exprNodeSList_free (el); | |
7158 | return ((hasDefault || hasAllMembers) && mustReturn); | |
7159 | } | |
7160 | ||
7161 | exprNode exprNode_switch (/*@only@*/ exprNode e, /*@only@*/ exprNode s) | |
7162 | { | |
7163 | exprNode ret = exprNode_createPartialCopy (e); | |
7164 | bool allpaths; | |
7165 | ||
7166 | DPRINTF (("Switch: %s", exprNode_unparse (s))); | |
7167 | ||
7168 | ret->kind = XPR_SWITCH; | |
7169 | ret->edata = exprData_makePair (e, s); | |
7170 | ||
7171 | if (!exprNode_isError (s)) | |
7172 | { | |
7173 | exprNode fs = exprNode_firstStatement (s); | |
7174 | ret->loc = fileloc_update (ret->loc, s->loc); | |
7175 | ||
7176 | if (exprNode_isUndefined (fs) | |
7177 | || exprNode_isCaseMarker (fs) || exprNode_isLabelMarker (fs) | |
7178 | || exprNode_isDefaultMarker (fs)) { | |
7179 | ; | |
7180 | } else { | |
7181 | voptgenerror (FLG_FIRSTCASE, | |
7182 | message | |
7183 | ("Statement after switch is not a case: %s", exprNode_unparse (fs)), | |
7184 | fs->loc); | |
7185 | } | |
7186 | } | |
7187 | ||
7188 | if (!exprNode_isError (e)) | |
7189 | { | |
7190 | if (checkSwitchExpr (e, s, &allpaths)) | |
7191 | { | |
7192 | ret->exitCode = XK_MUSTRETURN; | |
7193 | } | |
7194 | else | |
7195 | { | |
7196 | ret->exitCode = e->exitCode; | |
7197 | } | |
7198 | ||
7199 | ret->canBreak = e->canBreak; | |
7200 | ret->mustBreak = e->mustBreak; | |
7201 | } | |
7202 | /* | |
7203 | ** forgot this! | |
7204 | ** exprNode.c:3883,32: Variable allpaths used before definition | |
7205 | */ | |
7206 | else | |
7207 | { | |
7208 | allpaths = FALSE; | |
7209 | } | |
7210 | ||
7211 | DPRINTF (("Context exit switch!")); | |
7212 | context_exitSwitch (ret, allpaths); | |
7213 | DPRINTF (("Context exit switch done!")); | |
7214 | ||
7215 | return ret; | |
7216 | } | |
7217 | ||
7218 | static void checkInfiniteLoop (/*@notnull@*/ exprNode test, | |
7219 | /*@notnull@*/ exprNode body) | |
7220 | { | |
7221 | sRefSet tuses = test->uses; | |
7222 | ||
7223 | if (!sRefSet_isEmpty (test->uses)) | |
7224 | { | |
7225 | sRefSet sets = sRefSet_newCopy (body->sets); | |
7226 | bool hasError = TRUE; | |
7227 | bool innerState = FALSE; | |
7228 | sRefSet tuncon = sRefSet_undefined; | |
7229 | ||
7230 | sets = sRefSet_union (sets, test->sets); | |
7231 | sets = sRefSet_union (sets, body->msets); | |
7232 | sets = sRefSet_union (sets, test->msets); | |
7233 | ||
7234 | sRefSet_allElements (tuses, el) | |
7235 | { | |
7236 | if (sRef_isUnconstrained (el)) | |
7237 | { | |
7238 | tuncon = sRefSet_insert (tuncon, el); | |
7239 | } | |
7240 | else | |
7241 | { | |
7242 | if (sRefSet_member (sets, el)) | |
7243 | { | |
7244 | hasError = FALSE; | |
7245 | break; | |
7246 | } | |
7247 | } | |
7248 | ||
7249 | if (sRef_isInternalState (el) | |
7250 | || sRef_isFileStatic (sRef_getRootBase (el))) | |
7251 | { | |
7252 | innerState = TRUE; | |
7253 | } | |
7254 | } end_sRefSet_allElements ; | |
7255 | ||
7256 | if (hasError) | |
7257 | { | |
7258 | sRefSet suncon = sRefSet_undefined; | |
7259 | bool sinner = FALSE; | |
7260 | ||
7261 | sRefSet_allElements (sets, el) | |
7262 | { | |
7263 | if (sRef_isUnconstrained (el)) | |
7264 | { | |
7265 | suncon = sRefSet_insert (suncon, el); | |
7266 | } | |
7267 | else if (sRef_isInternalState (el)) | |
7268 | { | |
7269 | sinner = TRUE; | |
7270 | } | |
7271 | else | |
7272 | { | |
7273 | ; | |
7274 | } | |
7275 | } end_sRefSet_allElements ; | |
7276 | ||
7277 | if (sinner && innerState) | |
7278 | { | |
7279 | ; | |
7280 | } | |
7281 | else if (sRefSet_isEmpty (tuncon) | |
7282 | && sRefSet_isEmpty (suncon)) | |
7283 | { | |
7284 | voptgenerror | |
7285 | (FLG_INFLOOPS, | |
7286 | message | |
7287 | ("Suspected infinite loop. No value used in loop test (%q) " | |
7288 | "is modified by test or loop body.", | |
7289 | sRefSet_unparsePlain (tuses)), | |
7290 | test->loc); | |
7291 | } | |
7292 | else | |
7293 | { | |
7294 | if (sRefSet_isEmpty (tuncon)) | |
7295 | { | |
7296 | voptgenerror | |
7297 | (FLG_INFLOOPSUNCON, | |
7298 | message ("Suspected infinite loop. No condition values " | |
7299 | "modified. Modification possible through " | |
7300 | "unconstrained calls: %q", | |
7301 | sRefSet_unparsePlain (suncon)), | |
7302 | test->loc); | |
7303 | } | |
7304 | else | |
7305 | { | |
7306 | voptgenerror | |
7307 | (FLG_INFLOOPSUNCON, | |
7308 | message ("Suspected infinite loop. No condition values " | |
7309 | "modified. Possible undetected dependency through " | |
7310 | "unconstrained calls in loop test: %q", | |
7311 | sRefSet_unparsePlain (tuncon)), | |
7312 | test->loc); | |
7313 | } | |
7314 | } | |
7315 | } | |
7316 | ||
7317 | sRefSet_free (sets); | |
7318 | } | |
7319 | } | |
7320 | ||
7321 | exprNode exprNode_while (/*@keep@*/ exprNode t, /*@keep@*/ exprNode b) | |
7322 | { | |
7323 | exprNode ret; | |
7324 | bool emptyErr = FALSE; | |
7325 | ||
7326 | if (context_maybeSet (FLG_WHILEEMPTY)) | |
7327 | { | |
7328 | if (exprNode_isEmptyStatement (b)) | |
7329 | { | |
7330 | emptyErr = optgenerror | |
7331 | (FLG_WHILEEMPTY, | |
7332 | cstring_makeLiteral | |
7333 | ("Body of while statement is empty"), | |
7334 | exprNode_loc (b)); | |
7335 | } | |
7336 | } | |
7337 | ||
7338 | if (!emptyErr && context_maybeSet (FLG_WHILEBLOCK)) | |
7339 | { | |
7340 | if (exprNode_isDefined (b) | |
7341 | && !exprNode_isBlock (b)) | |
7342 | { | |
7343 | if (context_inIterDef () | |
7344 | && (b->kind == XPR_STMTLIST | |
7345 | || b->kind == XPR_TOK)) | |
7346 | { | |
7347 | ; /* no error */ | |
7348 | } | |
7349 | else | |
7350 | { | |
7351 | voptgenerror (FLG_WHILEBLOCK, | |
7352 | message | |
7353 | ("Body of while statement is not a block: %s", | |
7354 | exprNode_unparse (b)), | |
7355 | exprNode_loc (b)); | |
7356 | } | |
7357 | } | |
7358 | } | |
7359 | ||
7360 | if (exprNode_isError (t)) | |
7361 | { | |
7362 | if (exprNode_isError (b)) | |
7363 | { | |
7364 | ret = exprNode_createLoc (ctype_unknown, fileloc_copy (g_currentloc)); | |
7365 | } | |
7366 | else | |
7367 | { | |
7368 | ret = exprNode_createPartialCopy (b); | |
7369 | } | |
7370 | } | |
7371 | else | |
7372 | { | |
7373 | exprNode test; | |
7374 | ||
7375 | ret = exprNode_createPartialCopy (t); | |
7376 | ||
7377 | llassert (t->kind == XPR_WHILEPRED); | |
7378 | ||
7379 | test = exprData_getSingle (t->edata); | |
7380 | ||
7381 | if (!exprNode_isError (b) && exprNode_isDefined (test)) | |
7382 | { | |
7383 | if (context_maybeSet (FLG_INFLOOPS) | |
7384 | || context_maybeSet (FLG_INFLOOPSUNCON)) | |
7385 | { | |
7386 | /* | |
7387 | ** check that some variable in the predicate is set by the body | |
7388 | ** if the predicate uses any variables | |
7389 | */ | |
7390 | ||
7391 | checkInfiniteLoop (test, b); | |
7392 | } | |
7393 | ||
7394 | exprNode_mergeUSs (ret, b); | |
7395 | ||
7396 | if (exprNode_isDefined (b)) | |
7397 | { | |
7398 | ret->exitCode = exitkind_makeConditional (b->exitCode); | |
7399 | } | |
7400 | } | |
7401 | } | |
7402 | ||
7403 | ret->edata = exprData_makePair (t, b); | |
7404 | ret->kind = XPR_WHILE; | |
7405 | ||
7406 | if (exprNode_isDefined (t) && exprNode_mustEscape (t)) | |
7407 | { | |
7408 | voptgenerror | |
7409 | (FLG_ALWAYSEXITS, | |
7410 | message ("Predicate always exits: %s", exprNode_unparse (t)), | |
7411 | exprNode_loc (t)); | |
7412 | } | |
7413 | ||
7414 | ret->exitCode = XK_NEVERESCAPE; | |
7415 | ||
7416 | /* | |
7417 | ** If loop is infinite, and there is no break inside, | |
7418 | ** exit code is never reach. | |
7419 | */ | |
7420 | ||
7421 | if (exprNode_knownIntValue (t)) | |
7422 | { | |
7423 | if (!exprNode_isZero (t)) | |
7424 | { | |
7425 | if (exprNode_isDefined (b)) | |
7426 | { | |
7427 | if (!b->canBreak) | |
7428 | { | |
7429 | /* Really, it means never reached. */ | |
7430 | ret->exitCode = XK_MUSTEXIT; | |
7431 | } | |
7432 | } | |
7433 | } | |
7434 | } | |
7435 | else | |
7436 | { | |
7437 | ; | |
7438 | } | |
7439 | ||
7440 | ret->canBreak = FALSE; | |
7441 | ret->mustBreak = FALSE; | |
7442 | ||
7443 | return ret; | |
7444 | } | |
7445 | ||
7446 | /* | |
7447 | ** do { b } while (t); | |
7448 | ** | |
7449 | ** note: body passed as first argument | |
7450 | */ | |
7451 | ||
7452 | exprNode exprNode_doWhile (/*@only@*/ exprNode b, /*@only@*/ exprNode t) | |
7453 | { | |
7454 | exprNode ret; | |
7455 | ||
7456 | DPRINTF (("Do while: %s / %s", | |
7457 | exprNode_unparse (b), exprNode_unparse (t))); | |
7458 | ||
7459 | if (exprNode_isError (t)) | |
7460 | { | |
7461 | if (exprNode_isError (b)) | |
7462 | { | |
7463 | ret = exprNode_createLoc (ctype_unknown, fileloc_copy (g_currentloc)); | |
7464 | } | |
7465 | else | |
7466 | { | |
7467 | ret = exprNode_createPartialCopy (b); | |
7468 | ||
7469 | ret->exitCode = exitkind_makeConditional (b->exitCode); | |
7470 | exprNode_checkUse (ret, b->sref, b->loc); | |
7471 | ret->exitCode = b->exitCode; | |
7472 | ret->canBreak = b->canBreak; | |
7473 | ret->mustBreak = FALSE; | |
7474 | } | |
7475 | } | |
7476 | else | |
7477 | { | |
7478 | DPRINTF (("Do while: %s / %s", | |
7479 | exitkind_unparse (t->exitCode), | |
7480 | exitkind_unparse (b->exitCode))); | |
7481 | ||
7482 | ret = exprNode_createPartialCopy (t); | |
7483 | exprNode_checkPred (cstring_makeLiteralTemp ("while"), t); | |
7484 | ||
7485 | if (!exprNode_isError (b)) | |
7486 | { | |
7487 | /* | |
7488 | ** forgot the copy's --- why wasn't this detected?? | |
7489 | */ | |
7490 | ||
7491 | ret->sets = sRefSet_copyInto (ret->sets, b->sets); | |
7492 | ret->msets = sRefSet_copyInto (ret->msets, b->msets); | |
7493 | ret->uses = sRefSet_copyInto (ret->uses, b->uses); | |
7494 | ||
7495 | /* left this out --- causes and aliasing bug (infinite loop) | |
7496 | should be detected?? */ | |
7497 | ||
7498 | exprNode_checkUse (ret, b->sref, b->loc); | |
7499 | exprNode_mergeUSs (ret, t); | |
7500 | exprNode_checkUse (ret, t->sref, t->loc); | |
7501 | ||
7502 | /* evans 2001-10-05: while loop can break */ | |
7503 | ret->exitCode = exitkind_makeConditional (b->exitCode); | |
7504 | ||
7505 | DPRINTF (("Do while: %s", | |
7506 | exitkind_unparse (ret->exitCode))); | |
7507 | ||
7508 | ret->canBreak = b->canBreak; | |
7509 | ||
7510 | /* Always FALSE for doWhile loops - break's when test is false */ | |
7511 | ret->mustBreak = FALSE; /* b->mustBreak; */ | |
7512 | } | |
7513 | } | |
7514 | ||
7515 | context_exitDoWhileClause (t); | |
7516 | ||
7517 | ret->kind = XPR_DOWHILE; | |
7518 | ret->edata = exprData_makePair (t, b); | |
7519 | return ret; | |
7520 | } | |
7521 | ||
7522 | bool exprNode_loopMustExec (exprNode forPred) | |
7523 | { | |
7524 | /* | |
7525 | ** Returns true if it is obvious that the loop always executes at least once | |
7526 | ** | |
7527 | ** For now, we only identify the most obvious cases. Should be true anytime | |
7528 | ** we can prove init => !test. | |
7529 | */ | |
7530 | ||
7531 | if (exprNode_isDefined (forPred)) | |
7532 | { | |
7533 | exprNode init, test, inc; | |
7534 | exprData edata; | |
7535 | ||
7536 | llassert (forPred->kind == XPR_FORPRED); | |
7537 | ||
7538 | edata = forPred->edata; | |
7539 | init = exprData_getTripleInit (edata); | |
7540 | test = exprData_getTripleTest (edata); | |
7541 | inc = exprData_getTripleInc (edata); | |
7542 | ||
7543 | if (exprNode_isAssign (init)) | |
7544 | { | |
7545 | exprNode loopVar = exprData_getOpA (init->edata); | |
7546 | exprNode loopInit = exprData_getOpB (init->edata); | |
7547 | ||
7548 | if (exprNode_isDefined (test) && test->kind == XPR_OP) | |
7549 | { | |
7550 | exprNode testVar = exprData_getOpA (test->edata); | |
7551 | exprNode testVal = exprData_getOpB (test->edata); | |
7552 | lltok comp = exprData_getOpTok (test->edata); | |
7553 | int opid = lltok_getTok (comp); | |
7554 | ||
7555 | DPRINTF (("Same storage: %s / %s", exprNode_unparse (loopVar), | |
7556 | exprNode_unparse (testVar))); | |
7557 | ||
7558 | if (exprNode_sameStorage (loopVar, testVar)) | |
7559 | { | |
7560 | multiVal valinit = exprNode_getValue (loopInit); | |
7561 | multiVal valtest = exprNode_getValue (testVal); | |
7562 | ||
7563 | DPRINTF (("Values: %s / %s", multiVal_unparse (valinit), | |
7564 | multiVal_unparse (valtest))); | |
7565 | ||
7566 | if (multiVal_isInt (valinit) && multiVal_isInt (valtest)) | |
7567 | { | |
7568 | long v1 = multiVal_forceInt (valinit); | |
7569 | long v2 = multiVal_forceInt (valtest); | |
7570 | ||
7571 | DPRINTF (("Here: %ld %ld", v1, v2)); | |
7572 | ||
7573 | if ((opid == EQ_OP && v1 < v2) | |
7574 | || (opid == NE_OP && v1 != v2) | |
7575 | || (opid == TLT && v1 <= v2) | |
7576 | || (opid == TGT && v1 >= v2) | |
7577 | || (opid == LE_OP && v1 < v2) | |
7578 | || (opid == GE_OP && v1 > v2)) | |
7579 | { | |
7580 | DPRINTF (("mustexec if inc")); | |
7581 | return TRUE; | |
7582 | } | |
7583 | } | |
7584 | } | |
7585 | } | |
7586 | } | |
7587 | } | |
7588 | ||
7589 | DPRINTF (("loop must exec: FALSE")); | |
7590 | return FALSE; | |
7591 | } | |
7592 | ||
7593 | exprNode exprNode_for (/*@keep@*/ exprNode inc, /*@keep@*/ exprNode body) | |
7594 | { | |
7595 | exprNode ret; | |
7596 | bool emptyErr = FALSE; | |
7597 | ||
7598 | if (context_maybeSet (FLG_FOREMPTY)) | |
7599 | { | |
7600 | if (exprNode_isEmptyStatement (body)) | |
7601 | { | |
7602 | emptyErr = optgenerror | |
7603 | (FLG_FOREMPTY, | |
7604 | cstring_makeLiteral | |
7605 | ("Body of for statement is empty"), | |
7606 | exprNode_loc (body)); | |
7607 | } | |
7608 | } | |
7609 | ||
7610 | if (!emptyErr && context_maybeSet (FLG_FORBLOCK)) | |
7611 | { | |
7612 | if (exprNode_isDefined (body) | |
7613 | && !exprNode_isBlock (body)) | |
7614 | { | |
7615 | if (context_inIterDef () | |
7616 | && (body->kind == XPR_STMTLIST | |
7617 | || body->kind == XPR_TOK)) | |
7618 | { | |
7619 | ; /* no error */ | |
7620 | } | |
7621 | else | |
7622 | { | |
7623 | voptgenerror (FLG_FORBLOCK, | |
7624 | message | |
7625 | ("Body of for statement is not a block: %s", | |
7626 | exprNode_unparse (body)), | |
7627 | exprNode_loc (body)); | |
7628 | } | |
7629 | } | |
7630 | } | |
7631 | ||
7632 | /* | |
7633 | ** for ud purposes: (alreadly) init -> test -> (now) LOOP: body + inc + test | |
7634 | */ | |
7635 | ||
7636 | if (exprNode_isError (body)) | |
7637 | { | |
7638 | ret = exprNode_createPartialCopy (inc); | |
7639 | } | |
7640 | else | |
7641 | { | |
7642 | ret = exprNode_createPartialCopy (body); | |
7643 | ||
7644 | ret->exitCode = exitkind_makeConditional (body->exitCode); | |
7645 | ||
7646 | exprNode_mergeUSs (inc, body); | |
7647 | ||
7648 | if (exprNode_isDefined (inc)) | |
7649 | { | |
7650 | exprNode tmp; | |
7651 | ||
7652 | context_setMessageAnnote (cstring_makeLiteral ("in post loop increment")); | |
7653 | ||
7654 | tmp = exprNode_effect (exprData_getTripleInc (inc->edata)); | |
7655 | exprNode_freeShallow (tmp); | |
7656 | ||
7657 | context_clearMessageAnnote (); | |
7658 | context_setMessageAnnote (cstring_makeLiteral ("in post loop test")); | |
7659 | ||
7660 | tmp = exprNode_effect (exprData_getTripleTest (inc->edata)); | |
7661 | exprNode_freeShallow (tmp); | |
7662 | ||
7663 | context_clearMessageAnnote (); | |
7664 | ||
7665 | ret->uses = sRefSet_copyInto (ret->uses, inc->uses); | |
7666 | ret->sets = sRefSet_copyInto (ret->sets, inc->sets); | |
7667 | ret->msets = sRefSet_copyInto (ret->msets, inc->msets); | |
7668 | } | |
7669 | } | |
7670 | ||
7671 | ret->kind = XPR_FOR; | |
7672 | ret->edata = exprData_makePair (inc, body); | |
7673 | ||
7674 | if (exprNode_isDefined (inc)) { | |
7675 | exprNode test = exprData_getTripleTest (inc->edata); | |
7676 | ||
7677 | if (exprNode_isUndefined (test)) { | |
7678 | if (exprNode_isDefined (body)) { | |
7679 | if (!body->canBreak) { | |
7680 | /* Really, it means never reached. */ | |
7681 | ret->exitCode = XK_MUSTEXIT; | |
7682 | } | |
7683 | } | |
7684 | } | |
7685 | } | |
7686 | ||
7687 | return (ret); | |
7688 | } | |
7689 | ||
7690 | /* | |
7691 | ** for (init; test; inc) | |
7692 | ** ==> | |
7693 | ** init; | |
7694 | ** while (test) { body; inc; } | |
7695 | ** | |
7696 | ** Now: check use of init (may set vars for test) | |
7697 | ** check use of test | |
7698 | ** no checks on inc | |
7699 | _*/ | |
7700 | ||
7701 | /*@observer@*/ guardSet exprNode_getForGuards (exprNode pred) | |
7702 | { | |
7703 | exprNode test; | |
7704 | ||
7705 | if (exprNode_isError (pred)) return guardSet_undefined; | |
7706 | ||
7707 | llassert (pred->kind == XPR_FORPRED); | |
7708 | ||
7709 | test = exprData_getTripleTest (pred->edata); | |
7710 | ||
7711 | if (!exprNode_isError (test)) | |
7712 | { | |
7713 | return (test->guards); | |
7714 | } | |
7715 | ||
7716 | return guardSet_undefined; | |
7717 | } | |
7718 | ||
7719 | exprNode exprNode_whilePred (/*@only@*/ exprNode test) | |
7720 | { | |
7721 | exprNode ret = exprNode_createSemiCopy (test); | |
7722 | ||
7723 | if (exprNode_isDefined (test)) | |
7724 | { | |
7725 | exprNode_copySets (ret, test); | |
7726 | exprNode_checkPred (cstring_makeLiteralTemp ("while"), test); | |
7727 | exprNode_checkUse (ret, test->sref, test->loc); | |
7728 | ||
7729 | exprNode_produceGuards (test); | |
7730 | ||
7731 | ret->guards = guardSet_copy (test->guards); | |
7732 | } | |
7733 | ||
7734 | ret->edata = exprData_makeSingle (test); | |
7735 | ret->kind = XPR_WHILEPRED; | |
7736 | return ret; | |
7737 | } | |
7738 | ||
7739 | exprNode exprNode_forPred (/*@only@*/ exprNode init, /*@only@*/ exprNode test, | |
7740 | /*@only@*/ exprNode inc) | |
7741 | { | |
7742 | exprNode ret; | |
7743 | ||
7744 | /* | |
7745 | ** for ud purposes: init -> test -> LOOP: [ body, inc ] | |
7746 | */ | |
7747 | ||
7748 | exprNode_checkPred (cstring_makeLiteralTemp ("for"), test); | |
7749 | ||
7750 | if (!exprNode_isError (inc)) | |
7751 | { | |
7752 | ret = exprNode_createPartialCopy (inc); | |
7753 | } | |
7754 | else | |
7755 | { | |
7756 | if (!exprNode_isError (init)) | |
7757 | { | |
7758 | ret = exprNode_createPartialCopy (init); | |
7759 | } | |
7760 | else if (!exprNode_isError (test)) | |
7761 | { | |
7762 | ret = exprNode_createPartialCopy (test); | |
7763 | } | |
7764 | else | |
7765 | { | |
7766 | ret = exprNode_createUnknown (); | |
7767 | } | |
7768 | } | |
7769 | ||
7770 | exprNode_mergeUSs (ret, init); | |
7771 | ||
7772 | if (exprNode_isDefined (init)) | |
7773 | { | |
7774 | exprNode_checkUse (ret, init->sref, init->loc); | |
7775 | } | |
7776 | ||
7777 | exprNode_mergeUSs (ret, test); | |
7778 | ||
7779 | if (exprNode_isDefined (test)) | |
7780 | { | |
7781 | exprNode_checkUse (ret, test->sref, test->loc); | |
7782 | } | |
7783 | ||
7784 | ret->kind = XPR_FORPRED; | |
7785 | ret->edata = exprData_makeFor (init, test, inc); | |
7786 | return (ret); | |
7787 | } | |
7788 | ||
7789 | /*@notnull@*/ /*@only@*/ exprNode exprNode_goto (/*@only@*/ cstring label) | |
7790 | { | |
7791 | exprNode ret = exprNode_createUnknown (); | |
7792 | ||
7793 | if (context_inMacro ()) | |
7794 | { | |
7795 | voptgenerror (FLG_MACROSTMT, | |
7796 | message ("Macro %s uses goto (not functional)", | |
7797 | context_inFunctionName ()), | |
7798 | g_currentloc); | |
7799 | } | |
7800 | ||
7801 | ret->kind = XPR_GOTO; | |
7802 | ret->edata = exprData_makeLiteral (label); | |
7803 | ret->mustBreak = TRUE; | |
7804 | ret->exitCode = XK_GOTO; | |
7805 | ret->canBreak = TRUE; | |
7806 | return ret; | |
7807 | } | |
7808 | ||
7809 | exprNode exprNode_continue (/*@only@*/ lltok l, int qcontinue) | |
7810 | { | |
7811 | exprNode ret = exprNode_createLoc (ctype_unknown, fileloc_copy (lltok_getLoc (l))); | |
7812 | ||
7813 | ret->kind = XPR_CONTINUE; | |
7814 | ret->edata = exprData_makeTok (l); | |
7815 | ret->canBreak = TRUE; | |
7816 | ret->mustBreak = TRUE; | |
7817 | ||
7818 | if (qcontinue == QSAFEBREAK) | |
7819 | { | |
7820 | ; /* no checking */ | |
7821 | } | |
7822 | else if (qcontinue == QINNERCONTINUE) | |
7823 | { | |
7824 | if (!context_inDeepLoop ()) | |
7825 | { | |
7826 | voptgenerror | |
7827 | (FLG_LOOPLOOPCONTINUE, | |
7828 | cstring_makeLiteral ("Continue statement marked with innercontinue " | |
7829 | "is not inside a nested loop"), | |
7830 | exprNode_loc (ret)); | |
7831 | } | |
7832 | } | |
7833 | else if (qcontinue == BADTOK) | |
7834 | { | |
7835 | if (context_inDeepLoop ()) | |
7836 | { | |
7837 | voptgenerror | |
7838 | (FLG_LOOPLOOPCONTINUE, | |
7839 | cstring_makeLiteral ("Continue statement in nested loop"), | |
7840 | exprNode_loc (ret)); | |
7841 | } | |
7842 | } | |
7843 | else | |
7844 | { | |
7845 | llbuglit ("exprNode_continue: bad qcontinue"); | |
7846 | } | |
7847 | ||
7848 | return ret; | |
7849 | } | |
7850 | ||
7851 | exprNode exprNode_break (/*@only@*/ lltok l, int bqual) | |
7852 | { | |
7853 | exprNode ret = exprNode_createLoc (ctype_unknown, fileloc_copy (lltok_getLoc (l))); | |
7854 | clause breakClause = context_breakClause (); | |
7855 | ||
7856 | ret->kind = XPR_BREAK; | |
7857 | ret->edata = exprData_makeTok (l); | |
7858 | ret->canBreak = TRUE; | |
7859 | ret->mustBreak = TRUE; | |
7860 | ||
7861 | if (breakClause == NOCLAUSE) | |
7862 | { | |
7863 | voptgenerror | |
7864 | (FLG_SYNTAX, | |
7865 | cstring_makeLiteral ("Break not inside while, for or switch statement"), | |
7866 | exprNode_loc (ret)); | |
7867 | } | |
7868 | else | |
7869 | { | |
7870 | if (bqual != BADTOK) | |
7871 | { | |
7872 | switch (bqual) | |
7873 | { | |
7874 | case QSAFEBREAK: | |
7875 | break; | |
7876 | case QINNERBREAK: | |
7877 | if (breakClause == SWITCHCLAUSE) | |
7878 | { | |
7879 | if (!context_inDeepSwitch ()) | |
7880 | { | |
7881 | voptgenerror (FLG_SYNTAX, | |
7882 | cstring_makeLiteral | |
7883 | ("Break preceded by innerbreak is not in a deep switch"), | |
7884 | exprNode_loc (ret)); | |
7885 | } | |
7886 | } | |
7887 | else | |
7888 | { | |
7889 | if (!context_inDeepLoop ()) | |
7890 | { | |
7891 | voptgenerror (FLG_SYNTAX, | |
7892 | cstring_makeLiteral | |
7893 | ("Break preceded by innerbreak is not in a deep loop"), | |
7894 | exprNode_loc (ret)); | |
7895 | } | |
7896 | } | |
7897 | break; | |
7898 | case QLOOPBREAK: | |
7899 | if (breakClause == SWITCHCLAUSE) | |
7900 | { | |
7901 | voptgenerror (FLG_SYNTAX, | |
7902 | cstring_makeLiteral | |
7903 | ("Break preceded by loopbreak is breaking a switch"), | |
7904 | exprNode_loc (ret)); | |
7905 | } | |
7906 | break; | |
7907 | case QSWITCHBREAK: | |
7908 | if (breakClause != SWITCHCLAUSE) | |
7909 | { | |
7910 | voptgenerror | |
7911 | (FLG_SYNTAX, | |
7912 | message ("Break preceded by switchbreak is breaking %s", | |
7913 | cstring_makeLiteralTemp | |
7914 | ((breakClause == WHILECLAUSE | |
7915 | || breakClause == DOWHILECLAUSE) ? "a while loop" | |
7916 | : (breakClause == FORCLAUSE) ? "a for loop" | |
7917 | : (breakClause == ITERCLAUSE) ? "an iterator" | |
7918 | : "<error loop>")), | |
7919 | exprNode_loc (ret)); | |
7920 | } | |
7921 | break; | |
7922 | BADDEFAULT; | |
7923 | } | |
7924 | } | |
7925 | else | |
7926 | { | |
7927 | if (breakClause == SWITCHCLAUSE) | |
7928 | { | |
7929 | clause nextBreakClause = context_nextBreakClause (); | |
7930 | ||
7931 | switch (nextBreakClause) | |
7932 | { | |
7933 | case NOCLAUSE: break; | |
7934 | case WHILECLAUSE: | |
7935 | case DOWHILECLAUSE: | |
7936 | case FORCLAUSE: | |
7937 | case ITERCLAUSE: | |
7938 | voptgenerror | |
7939 | (FLG_LOOPSWITCHBREAK, | |
7940 | cstring_makeLiteral ("Break statement in switch inside loop"), | |
7941 | exprNode_loc (ret)); | |
7942 | break; | |
7943 | case SWITCHCLAUSE: | |
7944 | voptgenerror | |
7945 | (FLG_SWITCHSWITCHBREAK, | |
7946 | cstring_makeLiteral ("Break statement in switch inside switch"), | |
7947 | exprNode_loc (ret)); | |
7948 | break; | |
7949 | BADDEFAULT; | |
7950 | } | |
7951 | } | |
7952 | else | |
7953 | { | |
7954 | if (context_inDeepLoop ()) | |
7955 | { | |
7956 | voptgenerror | |
7957 | (FLG_LOOPLOOPBREAK, | |
7958 | cstring_makeLiteral ("Break statement in nested loop"), | |
7959 | exprNode_loc (ret)); | |
7960 | } | |
7961 | else | |
7962 | { | |
7963 | if (context_inDeepLoopSwitch ()) | |
7964 | { | |
7965 | voptgenerror | |
7966 | (FLG_SWITCHLOOPBREAK, | |
7967 | cstring_makeLiteral ("Break statement in loop inside switch"), | |
7968 | exprNode_loc (ret)); | |
7969 | } | |
7970 | } | |
7971 | } | |
7972 | } | |
7973 | } | |
7974 | ||
7975 | return ret; | |
7976 | } | |
7977 | ||
7978 | exprNode exprNode_nullReturn (/*@only@*/ lltok t) | |
7979 | { | |
7980 | fileloc loc = lltok_getLoc (t); | |
7981 | exprNode ret = exprNode_createLoc (ctype_unknown, fileloc_copy (loc)); | |
7982 | ||
7983 | context_returnFunction (); | |
7984 | exprChecks_checkNullReturn (loc); | |
7985 | ||
7986 | ret->kind = XPR_NULLRETURN; | |
7987 | ret->edata = exprData_makeTok (t); | |
7988 | ret->exitCode = XK_MUSTRETURN; | |
7989 | return ret; | |
7990 | } | |
7991 | ||
7992 | exprNode exprNode_return (/*@only@*/ exprNode e) | |
7993 | { | |
7994 | exprNode ret; | |
7995 | ||
7996 | if (exprNode_isError (e)) | |
7997 | { | |
7998 | ret = exprNode_createUnknown (); | |
7999 | } | |
8000 | else | |
8001 | { | |
8002 | ret = exprNode_createLoc (ctype_unknown, fileloc_copy (e->loc)); | |
8003 | ||
8004 | exprNode_checkUse (ret, e->sref, e->loc); | |
8005 | exprNode_checkReturn (e); | |
8006 | } | |
8007 | ||
8008 | context_returnFunction (); | |
8009 | ret->kind = XPR_RETURN; | |
8010 | ret->edata = exprData_makeSingle (e); | |
8011 | ret->exitCode = XK_MUSTRETURN; | |
8012 | ||
8013 | return (ret); | |
8014 | } | |
8015 | ||
8016 | exprNode exprNode_comma (/*@only@*/ exprNode e1, /*@only@*/ exprNode e2) | |
8017 | { | |
8018 | exprNode ret; | |
8019 | ||
8020 | if (exprNode_isError (e1)) | |
8021 | { | |
8022 | if (exprNode_isError (e2)) | |
8023 | { | |
8024 | ret = exprNode_createLoc (ctype_unknown, fileloc_copy (g_currentloc)); | |
8025 | } | |
8026 | else | |
8027 | { | |
8028 | ret = exprNode_createPartialCopy (e2); | |
8029 | exprNode_checkUse (ret, e2->sref, e2->loc); | |
8030 | ret->sref = e2->sref; | |
8031 | } | |
8032 | } | |
8033 | else | |
8034 | { | |
8035 | ret = exprNode_createPartialCopy (e1); | |
8036 | ||
8037 | exprNode_checkUse (ret, e1->sref, e1->loc); | |
8038 | ||
8039 | if (!exprNode_isError (e2)) | |
8040 | { | |
8041 | exprNode_mergeUSs (ret, e2); | |
8042 | exprNode_checkUse (ret, e2->sref, e2->loc); | |
8043 | ret->sref = e2->sref; | |
8044 | } | |
8045 | } | |
8046 | ||
8047 | ret->kind = XPR_COMMA; | |
8048 | ret->edata = exprData_makePair (e1, e2); | |
8049 | ||
8050 | if (exprNode_isDefined (e1)) | |
8051 | { | |
8052 | if (exprNode_isDefined (e2)) | |
8053 | { | |
8054 | ret->typ = e2->typ; | |
8055 | ||
8056 | if (exprNode_mustEscape (e1) || e1->mustBreak) | |
8057 | { | |
8058 | voptgenerror | |
8059 | (FLG_UNREACHABLE, | |
8060 | message ("Second clause of comma expression is unreachable: %s", | |
8061 | exprNode_unparse (e2)), | |
8062 | exprNode_loc (e2)); | |
8063 | } | |
8064 | ||
8065 | ret->exitCode = exitkind_combine (e1->exitCode, e2->exitCode); | |
8066 | ret->mustBreak = e1->mustBreak || e2->mustBreak; | |
8067 | ret->canBreak = e1->canBreak || e2->canBreak; | |
8068 | } | |
8069 | else | |
8070 | { | |
8071 | if (exprNode_mustEscape (e1) || e1->mustBreak) | |
8072 | { | |
8073 | voptgenerror | |
8074 | (FLG_UNREACHABLE, | |
8075 | message ("Second clause of comma expression is unreachable: %s", | |
8076 | exprNode_unparse (e2)), | |
8077 | exprNode_loc (e2)); | |
8078 | } | |
8079 | ||
8080 | ret->exitCode = e1->exitCode; | |
8081 | ret->canBreak = e1->canBreak; | |
8082 | } | |
8083 | } | |
8084 | else | |
8085 | { | |
8086 | if (exprNode_isDefined (e2)) | |
8087 | { | |
8088 | ret->exitCode = e2->exitCode; | |
8089 | ret->mustBreak = e2->mustBreak; | |
8090 | ret->canBreak = e2->canBreak; | |
8091 | } | |
8092 | } | |
8093 | ||
8094 | return (ret); | |
8095 | } | |
8096 | ||
8097 | static bool exprNode_checkOneInit (/*@notnull@*/ exprNode el, exprNode val) | |
8098 | { | |
8099 | ctype t1 = exprNode_getType (el); | |
8100 | ctype t2 = exprNode_getType (val); | |
8101 | bool hasError = FALSE; | |
8102 | ||
8103 | DPRINTF (("Check one init: %s / %s", | |
8104 | exprNode_unparse (el), | |
8105 | exprNode_unparse (val))); | |
8106 | ||
8107 | if (ctype_isUnknown (t1)) | |
8108 | { | |
8109 | voptgenerror (FLG_IMPTYPE, | |
8110 | message ("Variable has unknown (implicitly int) type: %s", | |
8111 | exprNode_unparse (el)), | |
8112 | el->loc); | |
8113 | ||
8114 | t1 = ctype_int; | |
8115 | el->typ = ctype_int; | |
8116 | } | |
8117 | ||
8118 | if (exprNode_isDefined (val) && val->kind == XPR_INITBLOCK) | |
8119 | { | |
8120 | exprNodeList vals = exprData_getArgs (val->edata); | |
8121 | ||
8122 | DPRINTF (("Check one init: %s", exprNodeList_unparse (vals))); | |
8123 | DPRINTF (("Type: %s", ctype_unparse (t1))); | |
8124 | ||
8125 | if (ctype_isRealAP (t1)) | |
8126 | { | |
8127 | int i = 0; | |
8128 | int nerrors = 0; | |
8129 | ||
8130 | if (ctype_isFixedArray (t1)) | |
8131 | { | |
8132 | int nelements = long_toInt (ctype_getArraySize (t1)); | |
8133 | ||
8134 | DPRINTF (("Checked array: %s / %d", | |
8135 | ctype_unparse (t1), nelements)); | |
8136 | ||
8137 | if (exprNode_isStringLiteral (val)) | |
8138 | { | |
8139 | exprNode_checkStringLiteralLength (t1, val); | |
8140 | } | |
8141 | else | |
8142 | { | |
8143 | if (exprNodeList_size (vals) != nelements) | |
8144 | { | |
8145 | hasError = optgenerror | |
8146 | (exprNodeList_size (vals) > nelements ? FLG_INITSIZE : FLG_INITALLELEMENTS, | |
8147 | message ("Initializer block for " | |
8148 | "%s has %d element%&, but declared as %s: %q", | |
8149 | exprNode_unparse (el), | |
8150 | exprNodeList_size (vals), | |
8151 | ctype_unparse (t1), | |
8152 | exprNodeList_unparse (vals)), | |
8153 | val->loc); | |
8154 | } | |
8155 | } | |
8156 | } | |
8157 | ||
8158 | exprNodeList_elements (vals, oneval) | |
8159 | { | |
8160 | cstring istring = message ("%d", i); | |
8161 | exprNode newel = | |
8162 | exprNode_arrayFetch | |
8163 | (exprNode_fakeCopy (el), | |
8164 | exprNode_numLiteral (ctype_int, istring, | |
8165 | fileloc_copy (el->loc), i)); | |
8166 | ||
8167 | if (exprNode_isDefined (newel)) | |
8168 | { | |
8169 | if (exprNodeList_size (vals) == 1 | |
8170 | && ctype_isString (exprNode_getType (oneval)) | |
8171 | && ctype_isChar (exprNode_getType (newel))) | |
8172 | { | |
8173 | exprNode_freeIniter (newel); | |
8174 | } | |
8175 | else | |
8176 | { | |
8177 | if (exprNode_checkOneInit (newel, oneval)) | |
8178 | { | |
8179 | hasError = TRUE; | |
8180 | nerrors++; | |
8181 | ||
8182 | if (nerrors > 3 && exprNodeList_size (vals) > 6) | |
8183 | { | |
8184 | llgenmsg | |
8185 | (message ("Additional initialization errors " | |
8186 | "for %s not reported", | |
8187 | exprNode_unparse (el)), | |
8188 | exprNode_loc (el)); | |
8189 | exprNode_freeIniter (newel); | |
8190 | break; | |
8191 | } | |
8192 | else | |
8193 | { | |
8194 | exprNode_freeIniter (newel); | |
8195 | } | |
8196 | } | |
8197 | else | |
8198 | { | |
8199 | exprNode_freeIniter (newel); | |
8200 | } | |
8201 | } | |
8202 | } | |
8203 | ||
8204 | cstring_free (istring); | |
8205 | i++; | |
8206 | /*@-branchstate@*/ | |
8207 | } end_exprNodeList_elements; | |
8208 | /*@=branchstate@*/ | |
8209 | } | |
8210 | else if (ctype_isStruct (ctype_realType (t1))) | |
8211 | { | |
8212 | uentryList fields = ctype_getFields (t1); | |
8213 | int i = 0; | |
8214 | ||
8215 | if (uentryList_size (fields) != exprNodeList_size (vals)) | |
8216 | { | |
8217 | if (uentryList_size (fields) > exprNodeList_size (vals)) | |
8218 | { | |
8219 | hasError = optgenerror | |
8220 | (FLG_FULLINITBLOCK, | |
8221 | message ("Initializer block for " | |
8222 | "%s has %d field%&, but %s has %d field%&: %q", | |
8223 | exprNode_unparse (el), | |
8224 | exprNodeList_size (vals), | |
8225 | ctype_unparse (t1), | |
8226 | uentryList_size (fields), | |
8227 | exprNodeList_unparse (vals)), | |
8228 | val->loc); | |
8229 | } | |
8230 | else | |
8231 | { | |
8232 | hasError = optgenerror | |
8233 | (FLG_TYPE, | |
8234 | message ("Initializer block for " | |
8235 | "%s has %d field%&, but %s has %d field%&: %q", | |
8236 | exprNode_unparse (el), | |
8237 | exprNodeList_size (vals), | |
8238 | ctype_unparse (t1), | |
8239 | uentryList_size (fields), | |
8240 | exprNodeList_unparse (vals)), | |
8241 | val->loc); | |
8242 | } | |
8243 | } | |
8244 | else | |
8245 | { | |
8246 | exprNodeList_elements (vals, oneval) | |
8247 | { | |
8248 | uentry thisfield = uentryList_getN (fields, i); | |
8249 | exprNode newel = | |
8250 | exprNode_fieldAccessAux (exprNode_fakeCopy (el), | |
8251 | exprNode_loc (el), | |
8252 | uentry_getName (thisfield)); | |
8253 | ||
8254 | if (exprNode_isDefined (newel)) | |
8255 | { | |
8256 | if (exprNode_checkOneInit (newel, oneval)) | |
8257 | { | |
8258 | hasError = TRUE; | |
8259 | } | |
8260 | ||
8261 | exprNode_freeIniter (newel); | |
8262 | } | |
8263 | ||
8264 | i++; | |
8265 | } end_exprNodeList_elements; | |
8266 | } | |
8267 | } | |
8268 | /* evans 2001-12-30: added to fix bug reported by Jim Zelenka */ | |
8269 | else if (ctype_isUnion (ctype_realType (t1))) | |
8270 | { | |
8271 | uentryList fields = ctype_getFields (t1); | |
8272 | int i = 0; | |
8273 | ||
8274 | /* | |
8275 | ** Union initializers set the first member always. | |
8276 | */ | |
8277 | ||
8278 | DPRINTF (("Union initializer: %s / %s", | |
8279 | exprNode_unparse (el), ctype_unparse (ctype_realType (t1)))); | |
8280 | ||
8281 | if (exprNodeList_size (vals) != 1) | |
8282 | { | |
8283 | hasError = optgenerror | |
8284 | (FLG_TYPE, | |
8285 | message ("Initializer block for union " | |
8286 | "%s has %d elements, union initializers should have one element: %q", | |
8287 | exprNode_unparse (el), | |
8288 | exprNodeList_size (vals), | |
8289 | exprNodeList_unparse (vals)), | |
8290 | val->loc); | |
8291 | } | |
8292 | else | |
8293 | { | |
8294 | exprNode oneval = exprNodeList_head (vals); | |
8295 | uentry thisfield = uentryList_getN (fields, i); | |
8296 | exprNode newel = | |
8297 | exprNode_fieldAccessAux (exprNode_fakeCopy (el), | |
8298 | exprNode_loc (el), | |
8299 | uentry_getName (thisfield)); | |
8300 | ||
8301 | if (exprNode_isDefined (newel)) | |
8302 | { | |
8303 | if (exprNode_checkOneInit (newel, oneval)) | |
8304 | { | |
8305 | hasError = TRUE; | |
8306 | } | |
8307 | ||
8308 | exprNode_freeIniter (newel); | |
8309 | } | |
8310 | } | |
8311 | } | |
8312 | else | |
8313 | { | |
8314 | hasError = optgenerror | |
8315 | (FLG_TYPE, | |
8316 | message ("Initializer block used for " | |
8317 | "%s where %t is expected: %s", | |
8318 | exprNode_unparse (el), t1, exprNode_unparse (val)), | |
8319 | val->loc); | |
8320 | } | |
8321 | } | |
8322 | else | |
8323 | { | |
8324 | if (exprNode_isDefined (val)) | |
8325 | { | |
8326 | doAssign (el, val, TRUE); | |
8327 | ||
8328 | if (!exprNode_matchType (t1, val)) | |
8329 | { | |
8330 | hasError = gentypeerror | |
8331 | (t1, val, t2, el, | |
8332 | message ("Initial value of %s is type %t, " | |
8333 | "expects %t: %s", | |
8334 | exprNode_unparse (el), | |
8335 | t2, t1, exprNode_unparse (val)), | |
8336 | val->loc); | |
8337 | } | |
8338 | } | |
8339 | } | |
8340 | ||
8341 | return hasError; | |
8342 | } | |
8343 | ||
8344 | static exprNode | |
8345 | exprNode_makeInitializationAux (/*@temp@*/ idDecl t) | |
8346 | { | |
8347 | exprNode ret; | |
8348 | ||
8349 | DPRINTF (("Initialization: %s", idDecl_unparse (t))); | |
8350 | ||
8351 | if (usymtab_exists (idDecl_observeId (t))) | |
8352 | { | |
8353 | uentry ue = usymtab_lookup (idDecl_observeId (t)); | |
8354 | ret = exprNode_createId (ue); | |
8355 | ||
8356 | /*@i723 don't do this...but why? */ | |
8357 | # if 0 | |
8358 | ct = ctype_realishType (ret->typ); | |
8359 | ||
8360 | DPRINTF (("Type: %s", ctype_unparse (ret->typ))); | |
8361 | ||
8362 | if (ctype_isUnknown (ct)) | |
8363 | { | |
8364 | if (uentry_isAnyTag (ue)) | |
8365 | { | |
8366 | voptgenerror | |
8367 | (FLG_IMPTYPE, | |
8368 | message ("%s used but not previously declared: %s", | |
8369 | uentry_ekindName (ue), | |
8370 | idDecl_getName (t)), | |
8371 | g_currentloc); | |
8372 | ||
8373 | } | |
8374 | else | |
8375 | { | |
8376 | voptgenerror | |
8377 | (FLG_IMPTYPE, | |
8378 | message ("Variable has unknown (implicitly int) type: %s", | |
8379 | idDecl_getName (t)), | |
8380 | g_currentloc); | |
8381 | } | |
8382 | ||
8383 | ct = ctype_int; | |
8384 | } | |
8385 | # endif | |
8386 | } | |
8387 | else | |
8388 | { | |
8389 | uentry ue; | |
8390 | ||
8391 | DPRINTF (("Unrecognized: %s", idDecl_unparse (t))); | |
8392 | ||
8393 | ue = uentry_makeUnrecognized (idDecl_observeId (t), fileloc_copy (g_currentloc)); | |
8394 | /*!! fileloc_copy (g_currentloc)); */ | |
8395 | /*@i32!!! should get error without this */ | |
8396 | ||
8397 | ret = exprNode_fromIdentifierAux (ue); | |
8398 | ||
8399 | /* | |
8400 | ** No error - this happens in old style declarations: | |
8401 | ||
8402 | voptgenerror | |
8403 | (FLG_UNRECOG, | |
8404 | message ("Unrecognized identifier in intializer: %s", idDecl_observeId (t)), | |
8405 | g_currentloc); | |
8406 | ||
8407 | ** | |
8408 | */ | |
8409 | } | |
8410 | ||
8411 | exprData_free (ret->edata, ret->kind); | |
8412 | ret->edata = exprData_undefined; | |
8413 | ||
8414 | ret->exitCode = XK_NEVERESCAPE; | |
8415 | ret->mustBreak = FALSE; | |
8416 | ret->kind = XPR_INIT; | |
8417 | return ret; | |
8418 | } | |
8419 | ||
8420 | exprNode exprNode_makeEmptyInitialization (/*@only@*/ idDecl t) | |
8421 | { | |
8422 | exprNode ret = exprNode_makeInitializationAux (t); | |
8423 | llassert (ret->edata == exprData_undefined); | |
8424 | ret->edata = exprData_makeInit (t, exprNode_undefined); | |
8425 | return ret; | |
8426 | } | |
8427 | ||
8428 | exprNode exprNode_makeInitialization (/*@only@*/ idDecl t, | |
8429 | /*@only@*/ exprNode e) | |
8430 | { | |
8431 | uentry ue = usymtab_lookup (idDecl_observeId (t)); | |
8432 | exprNode ret = exprNode_makeInitializationAux (t); | |
8433 | fileloc loc = exprNode_loc (e); | |
8434 | ||
8435 | if (exprNode_isError (e)) | |
8436 | { | |
8437 | e = exprNode_createUnknown (); | |
8438 | idDecl_free (t); | |
8439 | ||
8440 | /* error: assume initializer is defined */ | |
8441 | sRef_setDefined (ret->sref, g_currentloc); | |
8442 | } | |
8443 | else | |
8444 | { | |
8445 | ctype ct = ctype_realishType (ret->typ); | |
8446 | ||
8447 | /* | |
8448 | ** evs - 9 Apr 1995 | |
8449 | ** | |
8450 | ** was addSafeUse --- what's the problem? | |
8451 | ** | |
8452 | ** int x = 3, y = x ? | |
8453 | */ | |
8454 | ||
8455 | exprData_free (ret->edata, ret->kind); | |
8456 | ret->edata = exprData_makeInit (t, e); | |
8457 | ||
8458 | exprNode_checkUse (ret, e->sref, e->loc); | |
8459 | ||
8460 | if (ctype_isUnknown (e->typ) && uentry_isValid (ue)) | |
8461 | { | |
8462 | exprNode lhs = exprNode_createId (ue); | |
8463 | ||
8464 | /* | |
8465 | ** static storage should be undefined before initializing | |
8466 | */ | |
8467 | ||
8468 | if (uentry_isStatic (ue)) | |
8469 | { | |
8470 | sRef_setDefState (lhs->sref, SS_PARTIAL, fileloc_undefined); | |
8471 | } | |
8472 | ||
8473 | (void) exprNode_checkOneInit (lhs, e); | |
8474 | ||
8475 | if (uentry_isStatic (ue)) | |
8476 | { | |
8477 | sRef_setDefState (lhs->sref, SS_DEFINED, fileloc_undefined); | |
8478 | } | |
8479 | ||
8480 | exprNode_free (lhs); | |
8481 | } | |
8482 | else | |
8483 | { | |
8484 | if (!exprNode_matchType (ct, e)) | |
8485 | { | |
8486 | if (exprNode_isZero (e) && ctype_isArrayPtr (ct)) | |
8487 | { | |
8488 | ; | |
8489 | } | |
8490 | else | |
8491 | { | |
8492 | (void) gentypeerror | |
8493 | (exprNode_getType (e), e, exprNode_getType (ret), ret, | |
8494 | message | |
8495 | ("Variable %q initialized to type %t, expects %t: %s", | |
8496 | uentry_getName (ue), exprNode_getType (e), | |
8497 | exprNode_getType (ret), | |
8498 | exprNode_unparse (e)), | |
8499 | e->loc); | |
8500 | } | |
8501 | } | |
8502 | } | |
8503 | ||
8504 | if (uentry_isStatic (ue)) | |
8505 | { | |
8506 | sRef_setDefState (ret->sref, SS_PARTIAL, fileloc_undefined); | |
8507 | } | |
8508 | ||
8509 | doAssign (ret, e, TRUE); | |
8510 | ||
8511 | if (uentry_isStatic (ue)) | |
8512 | { | |
8513 | sRef_setDefState (ret->sref, SS_DEFINED, fileloc_undefined); | |
8514 | } | |
8515 | } | |
8516 | ||
8517 | if (context_inIterDef ()) | |
8518 | { | |
8519 | /* should check if it is yield */ | |
8520 | uentry_setUsed (ue, loc); | |
8521 | } | |
8522 | else | |
8523 | { | |
8524 | ; | |
8525 | } | |
8526 | ||
8527 | exprNode_mergeUSs (ret, e); | |
8528 | return ret; | |
8529 | } | |
8530 | ||
8531 | exprNode exprNode_iter (/*@observer@*/ uentry name, | |
8532 | /*@only@*/ exprNodeList alist, | |
8533 | /*@only@*/ exprNode body, | |
8534 | /*@observer@*/ uentry end) | |
8535 | { | |
8536 | exprNode ret; | |
8537 | cstring iname; | |
8538 | ||
8539 | llassert (uentry_isValid (name)); | |
8540 | ||
8541 | uentry_setUsed (name, exprNode_loc (body)); | |
8542 | ||
8543 | ret = exprNode_createPartialCopy (body); | |
8544 | iname = uentry_getName (name); | |
8545 | ||
8546 | if (uentry_isInvalid (end)) | |
8547 | { | |
8548 | llerror (FLG_ITERBALANCE, | |
8549 | message ("Iter %s not balanced with end_%s", iname, iname)); | |
8550 | } | |
8551 | else | |
8552 | { | |
8553 | cstring ename = uentry_getName (end); | |
8554 | ||
8555 | if (!cstring_equalPrefixLit (ename, "end_")) | |
8556 | { | |
8557 | llerror (FLG_ITERBALANCE, message ("Iter %s not balanced with end_%s: %s", | |
8558 | iname, iname, ename)); | |
8559 | } | |
8560 | else | |
8561 | { | |
8562 | if (!cstring_equal (iname, cstring_suffix (ename, 4))) | |
8563 | { | |
8564 | llerror (FLG_ITERBALANCE, | |
8565 | message ("Iter %s not balanced with end_%s: %s", | |
8566 | iname, iname, ename)); | |
8567 | } | |
8568 | } | |
8569 | ||
8570 | cstring_free (ename); | |
8571 | } | |
8572 | ||
8573 | context_exitIterClause (body); | |
8574 | ||
8575 | ret->kind = XPR_ITER; | |
8576 | ret->edata = exprData_makeIter (name, alist, body, end); | |
8577 | ||
8578 | if (uentry_isIter (name)) | |
8579 | { | |
8580 | (void) checkArgsReal (name, body, | |
8581 | uentry_getParams (name), alist, TRUE, ret); | |
8582 | } | |
8583 | ||
8584 | cstring_free (iname); | |
8585 | ||
8586 | return ret; | |
8587 | } | |
8588 | ||
8589 | exprNode | |
8590 | exprNode_iterNewId (/*@only@*/ cstring s) | |
8591 | { | |
8592 | exprNode e = exprNode_new (); | |
8593 | uentry ue = uentryList_getN (uentry_getParams (getCurrentIter ()), iterParamNo ()); | |
8594 | ||
8595 | llassert (processingIterVars ()); | |
8596 | ||
8597 | e->loc = context_getSaveLocation (); | |
8598 | ||
8599 | if (fileloc_isUndefined (e->loc)) | |
8600 | { | |
8601 | fileloc_free (e->loc); | |
8602 | e->loc = fileloc_copy (g_currentloc); | |
8603 | } | |
8604 | ||
8605 | e->uses = sRefSet_new (); | |
8606 | e->sets = sRefSet_new (); | |
8607 | e->msets = sRefSet_new (); | |
8608 | e->kind = XPR_VAR; | |
8609 | e->val = multiVal_unknown (); | |
8610 | e->guards = guardSet_new (); | |
8611 | e->sref = defref; | |
8612 | e->isJumpPoint = FALSE; | |
8613 | e->exitCode = XK_NEVERESCAPE; | |
8614 | ||
8615 | /*> missing fields, detected by splint <*/ | |
8616 | e->canBreak = FALSE; | |
8617 | e->mustBreak = FALSE; | |
8618 | e->etext = cstring_undefined; | |
8619 | ||
8620 | if (uentry_isYield (ue)) | |
8621 | { | |
8622 | uentry uue = uentry_makeVariable (s, uentry_getType (ue), | |
8623 | fileloc_copy (e->loc), | |
8624 | FALSE); | |
8625 | sRef sr; | |
8626 | ||
8627 | uue = usymtab_supEntrySrefReturn (uue); | |
8628 | ||
8629 | sr = uentry_getSref (uue); | |
8630 | sRef_mergeStateQuiet (sr, uentry_getSref (ue)); | |
8631 | sr = uentry_getSref (uue); | |
8632 | sRef_setDefined (sr, e->loc); | |
8633 | ||
8634 | e->typ = uentry_getType (uue); | |
8635 | e->sref = sr; | |
8636 | e->edata = exprData_makeId (uue); | |
8637 | uentry_setUsed (uue, g_currentloc); | |
8638 | } | |
8639 | else | |
8640 | { | |
8641 | uentry uue; | |
8642 | ||
8643 | sRef_setGlobalScope (); | |
8644 | uue = uentry_makeVariableLoc (s, ctype_unknown); | |
8645 | ||
8646 | e->typ = ctype_unknown; | |
8647 | e->edata = exprData_makeId (uue); | |
8648 | ||
8649 | uentry_setUsed (uue, e->loc); | |
8650 | uentry_setHasNameError (uue); | |
8651 | ||
8652 | if (context_getFlag (FLG_REPEATUNRECOG)) | |
8653 | { | |
8654 | uentry_markOwned (uue); | |
8655 | } | |
8656 | else | |
8657 | { | |
8658 | usymtab_supGlobalEntry (uue); | |
8659 | } | |
8660 | ||
8661 | sRef_clearGlobalScope (); | |
8662 | ||
8663 | voptgenerror (FLG_UNRECOG, message ("Unrecognized identifier: %s", s), | |
8664 | e->loc); | |
8665 | } | |
8666 | ||
8667 | ||
8668 | cstring_free (s); | |
8669 | ||
8670 | exprNode_defineConstraints(e); | |
8671 | return (e); | |
8672 | } | |
8673 | ||
8674 | exprNode | |
8675 | exprNode_iterExpr (/*@returned@*/ exprNode e) | |
8676 | { | |
8677 | if (!processingIterVars ()) | |
8678 | { | |
8679 | llcontbuglit ("checkIterParam: not in iter"); | |
8680 | return e; | |
8681 | } | |
8682 | ||
8683 | if (uentry_isYield (uentryList_getN (uentry_getParams (getCurrentIter ()), | |
8684 | iterParamNo ()))) | |
8685 | { | |
8686 | if (exprNode_isDefined (e)) | |
8687 | { | |
8688 | if (fileloc_isDefined (e->loc)) | |
8689 | { | |
8690 | voptgenerror | |
8691 | (FLG_ITERYIELD, | |
8692 | message ("Yield parameter is not simple identifier: %s", | |
8693 | exprNode_unparse (e)), | |
8694 | e->loc); | |
8695 | } | |
8696 | else | |
8697 | { | |
8698 | voptgenerror | |
8699 | (FLG_ITERYIELD, | |
8700 | message ("Yield parameter is not simple identifier: %s", | |
8701 | exprNode_unparse (e)), | |
8702 | g_currentloc); | |
8703 | ||
8704 | } | |
8705 | } | |
8706 | } | |
8707 | return e; | |
8708 | } | |
8709 | ||
8710 | exprNode | |
8711 | exprNode_iterId (/*@observer@*/ uentry c) | |
8712 | { | |
8713 | uentry ue; | |
8714 | ||
8715 | llassert (processingIterVars ()); | |
8716 | ||
8717 | ue = uentryList_getN (uentry_getParams (getCurrentIter ()), | |
8718 | iterParamNo ()); | |
8719 | ||
8720 | if (uentry_isYield (ue)) | |
8721 | { | |
8722 | ctype ct = uentry_getType (ue); | |
8723 | exprNode e = exprNode_createPlain (ct); | |
8724 | cstring name = uentry_getName (c); | |
8725 | uentry le = uentry_makeVariable (name, ct, fileloc_undefined, FALSE); | |
8726 | ||
8727 | uentry_setUsed (ue, g_currentloc); | |
8728 | uentry_setHasNameError (ue); | |
8729 | ||
8730 | cstring_free (name); | |
8731 | ||
8732 | e->kind = XPR_VAR; | |
8733 | e->edata = exprData_makeId (le); | |
8734 | e->loc = context_getSaveLocation (); | |
8735 | e->sref = uentry_getSref (le); | |
8736 | ||
8737 | usymtab_supEntrySref (le); | |
8738 | ||
8739 | if (!context_inHeader ()) | |
8740 | { | |
8741 | if (optgenerror | |
8742 | (FLG_ITERYIELD, | |
8743 | message ("Yield parameter shadows local declaration: %q", | |
8744 | uentry_getName (c)), | |
8745 | fileloc_isDefined (e->loc) ? e->loc : g_currentloc)) | |
8746 | { | |
8747 | uentry_showWhereDeclared (c); | |
8748 | } | |
8749 | } | |
8750 | ||
8751 | return e; | |
8752 | } | |
8753 | ||
8754 | return (exprNode_fromIdentifierAux (c)); | |
8755 | } | |
8756 | ||
8757 | exprNode exprNode_iterStart (/*@observer@*/ uentry name, /*@only@*/ exprNodeList alist) | |
8758 | { | |
8759 | exprNode ret = exprNode_create (ctype_unknown); | |
8760 | ||
8761 | ret->kind = XPR_ITERCALL; | |
8762 | ret->edata = exprData_makeIterCall (name, alist); | |
8763 | ||
8764 | if (uentry_isIter (name)) | |
8765 | { | |
8766 | uentryList params = uentry_getParams (name); | |
8767 | ||
8768 | if (context_inIterDef () | |
8769 | && uentryList_size (params) == exprNodeList_size (alist)) | |
8770 | { | |
8771 | int i = 0; | |
8772 | ||
8773 | exprNodeList_elements (alist, arg) | |
8774 | { | |
8775 | uentry parg = uentryList_getN (params, i); | |
8776 | ||
8777 | if (uentry_isYield (parg)) | |
8778 | { | |
8779 | uentry ue = exprNode_getUentry (arg); | |
8780 | ||
8781 | if (uentry_isValid (ue)) | |
8782 | { | |
8783 | ; | |
8784 | } | |
8785 | } | |
8786 | ||
8787 | i++; | |
8788 | } end_exprNodeList_elements; | |
8789 | } | |
8790 | ||
8791 | (void) checkArgsReal (name, ret, params, alist, TRUE, ret); | |
8792 | checkUnspecCall (ret, params, alist); | |
8793 | } | |
8794 | ||
8795 | return ret; | |
8796 | } | |
8797 | ||
8798 | /*@exposed@*/ sRef exprNode_getSref (exprNode e) | |
8799 | { | |
8800 | if (exprNode_isDefined (e)) | |
8801 | { | |
8802 | /*@access sRef@*/ | |
8803 | if (e->sref == defref) /*@noaccess sRef@*/ | |
8804 | { | |
8805 | /*@-mods@*/ | |
8806 | e->sref = sRef_makeUnknown (); | |
8807 | sRef_setAliasKind (e->sref, AK_ERROR, fileloc_undefined); | |
8808 | /*@=mods@*/ | |
8809 | return e->sref; | |
8810 | } | |
8811 | else | |
8812 | { | |
8813 | return e->sref; | |
8814 | } | |
8815 | } | |
8816 | else | |
8817 | { | |
8818 | return sRef_undefined; | |
8819 | } | |
8820 | } | |
8821 | ||
8822 | /*@observer@*/ cstring | |
8823 | exprNode_unparseFirst (exprNode e) | |
8824 | { | |
8825 | if (exprNode_isDefined (e)) | |
8826 | { | |
8827 | cstring ret; | |
8828 | ||
8829 | if (e->kind == XPR_STMTLIST | |
8830 | || e->kind == XPR_COMMA || e->kind == XPR_COND) | |
8831 | { | |
8832 | exprNode first = exprData_getPairA (e->edata); | |
8833 | ||
8834 | if (exprNode_isDefined (first)) | |
8835 | { | |
8836 | return (exprNode_unparseFirst (exprData_getPairA (e->edata))); | |
8837 | } | |
8838 | else | |
8839 | { | |
8840 | return (cstring_makeLiteralTemp ("...")); | |
8841 | } | |
8842 | } | |
8843 | ||
8844 | ret = cstring_elide (exprNode_unparse (e), 20); | |
8845 | cstring_markOwned (ret); | |
8846 | ||
8847 | return (ret); | |
8848 | } | |
8849 | else | |
8850 | { | |
8851 | return cstring_makeLiteralTemp ("<error>"); | |
8852 | } | |
8853 | } | |
8854 | ||
8855 | /*@observer@*/ cstring | |
8856 | exprNode_unparse (/*@temp@*/ exprNode e) | |
8857 | { | |
8858 | if (exprNode_isError (e)) | |
8859 | { | |
8860 | return cstring_makeLiteralTemp ("<error>"); | |
8861 | } | |
8862 | ||
8863 | if (cstring_isDefined (e->etext)) | |
8864 | { | |
8865 | return e->etext; | |
8866 | } | |
8867 | else | |
8868 | { | |
8869 | cstring ret = exprNode_doUnparse (e); | |
8870 | ||
8871 | /*@-modifies@*/ /* benevolent */ | |
8872 | e->etext = ret; | |
8873 | /*@=modifies@*/ | |
8874 | return ret; | |
8875 | } | |
8876 | } | |
8877 | ||
8878 | /*@observer@*/ fileloc | |
8879 | exprNode_loc (exprNode e) | |
8880 | { | |
8881 | if (exprNode_isError (e)) | |
8882 | { | |
8883 | return (g_currentloc); | |
8884 | } | |
8885 | else | |
8886 | { | |
8887 | return (e->loc); | |
8888 | } | |
8889 | } | |
8890 | ||
8891 | /* | |
8892 | ** executes exprNode e | |
8893 | ** recursively rexecutes as though in original parse using | |
8894 | ** information in e->edata | |
8895 | */ | |
8896 | ||
8897 | static /*@only@*/ exprNodeList exprNodeList_effect (exprNodeList e) | |
8898 | { | |
8899 | exprNodeList ret = exprNodeList_new (); | |
8900 | ||
8901 | exprNodeList_elements (e, current) | |
8902 | { | |
8903 | exprNodeList_addh (ret, exprNode_effect (current)); | |
8904 | } end_exprNodeList_elements; | |
8905 | ||
8906 | return ret; | |
8907 | } | |
8908 | ||
8909 | static /*@only@*/ exprNode exprNode_effect (exprNode e) | |
8910 | /*@globals internalState@*/ | |
8911 | { | |
8912 | bool innerEffect = inEffect; | |
8913 | exprNode ret; | |
8914 | exprData data; | |
8915 | ||
8916 | inEffect = TRUE; | |
8917 | ||
8918 | context_clearJustPopped (); | |
8919 | ||
8920 | if (exprNode_isError (e)) | |
8921 | { | |
8922 | ret = exprNode_undefined; | |
8923 | } | |
8924 | else | |
8925 | { | |
8926 | /* | |
8927 | ** Turn off expose and dependent transfer checking. | |
8928 | ** Need to pass exposed internal nodes, | |
8929 | ** [ copying would be a waste! ] | |
8930 | ** [ Actually, I think I wasted a lot more time than its worth ] | |
8931 | ** [ trying to do this. ] | |
8932 | */ | |
8933 | ||
8934 | /*@-exposetrans@*/ | |
8935 | /*@-observertrans@*/ | |
8936 | /*@-dependenttrans@*/ | |
8937 | ||
8938 | data = e->edata; | |
8939 | ||
8940 | switch (e->kind) | |
8941 | { | |
8942 | case XPR_PARENS: | |
8943 | ret = exprNode_addParens (exprData_getUopTok (data), | |
8944 | exprNode_effect (exprData_getUopNode (data))); | |
8945 | break; | |
8946 | case XPR_ASSIGN: | |
8947 | ret = exprNode_assign (exprNode_effect (exprData_getOpA (data)), | |
8948 | exprNode_effect (exprData_getOpB (data)), | |
8949 | exprData_getOpTok (data)); | |
8950 | break; | |
8951 | case XPR_INITBLOCK: | |
8952 | ret = exprNode_undefined; | |
8953 | break; | |
8954 | case XPR_CALL: | |
8955 | ret = exprNode_functionCall (exprNode_effect (exprData_getFcn (data)), | |
8956 | exprNodeList_effect (exprData_getArgs (data))); | |
8957 | break; | |
8958 | case XPR_EMPTY: | |
8959 | ret = e; | |
8960 | break; | |
8961 | ||
8962 | case XPR_LABEL: | |
8963 | ret = e; | |
8964 | break; | |
8965 | ||
8966 | case XPR_CONST: | |
8967 | case XPR_VAR: | |
8968 | { | |
8969 | cstring id = exprData_getId (data); | |
8970 | uentry ue = usymtab_lookupSafe (id); | |
8971 | ||
8972 | ret = exprNode_fromIdentifierAux (ue); | |
8973 | ret->loc = fileloc_update (ret->loc, e->loc); | |
8974 | break; | |
8975 | } | |
8976 | case XPR_BODY: | |
8977 | ret = e; | |
8978 | break; | |
8979 | case XPR_FETCH: | |
8980 | ret = exprNode_arrayFetch (exprNode_effect (exprData_getPairA (data)), | |
8981 | exprNode_effect (exprData_getPairB (data))); | |
8982 | break; | |
8983 | case XPR_OP: | |
8984 | ret = exprNode_op (exprNode_effect (exprData_getOpA (data)), | |
8985 | exprNode_effect (exprData_getOpB (data)), | |
8986 | exprData_getOpTok (data)); | |
8987 | break; | |
8988 | ||
8989 | case XPR_POSTOP: | |
8990 | ret = exprNode_postOp (exprNode_effect (exprData_getUopNode (data)), | |
8991 | exprData_getUopTok (data)); | |
8992 | break; | |
8993 | case XPR_PREOP: | |
8994 | ret = exprNode_preOp (exprNode_effect (exprData_getUopNode (data)), | |
8995 | exprData_getUopTok (data)); | |
8996 | break; | |
8997 | ||
8998 | case XPR_OFFSETOF: | |
8999 | case XPR_SIZEOFT: | |
9000 | case XPR_SIZEOF: | |
9001 | case XPR_ALIGNOFT: | |
9002 | case XPR_ALIGNOF: | |
9003 | ret = e; | |
9004 | break; | |
9005 | ||
9006 | case XPR_VAARG: | |
9007 | ret = exprNode_vaArg (exprData_getCastTok (data), | |
9008 | exprNode_effect (exprData_getCastNode (data)), | |
9009 | exprData_getCastType (data)); | |
9010 | break; | |
9011 | ||
9012 | case XPR_CAST: | |
9013 | ret = exprNode_cast (exprData_getCastTok (data), | |
9014 | exprNode_effect (exprData_getCastNode (data)), | |
9015 | exprData_getCastType (data)); | |
9016 | break; | |
9017 | case XPR_ITERCALL: | |
9018 | ret = exprNode_iterStart (exprData_getIterCallIter (data), | |
9019 | exprNodeList_effect | |
9020 | (exprData_getIterCallArgs (data))); | |
9021 | break; | |
9022 | ||
9023 | case XPR_ITER: | |
9024 | ret = exprNode_iter (exprData_getIterSname (data), | |
9025 | exprNodeList_effect (exprData_getIterAlist (data)), | |
9026 | exprNode_effect (exprData_getIterBody (data)), | |
9027 | exprData_getIterEname (data)); | |
9028 | break; | |
9029 | ||
9030 | case XPR_FOR: | |
9031 | ret = exprNode_for (exprNode_effect (exprData_getPairA (data)), | |
9032 | exprNode_effect (exprData_getPairB (data))); | |
9033 | break; | |
9034 | ||
9035 | case XPR_FORPRED: | |
9036 | ret = exprNode_forPred (exprNode_effect (exprData_getTripleInit (data)), | |
9037 | exprNode_effect (exprData_getTripleTest (data)), | |
9038 | exprNode_effect (exprData_getTripleInc (data))); | |
9039 | break; | |
9040 | ||
9041 | case XPR_TOK: | |
9042 | ret = exprNode_createTok (exprData_getTok (data)); | |
9043 | break; | |
9044 | ||
9045 | case XPR_GOTO: | |
9046 | ret = exprNode_goto (exprData_getLiteral (data)); | |
9047 | ret->loc = fileloc_update (ret->loc, e->loc); | |
9048 | break; | |
9049 | ||
9050 | case XPR_CONTINUE: | |
9051 | ret = exprNode_continue (exprData_getTok (data), QSAFEBREAK); | |
9052 | break; | |
9053 | ||
9054 | case XPR_BREAK: | |
9055 | ret = exprNode_break (exprData_getTok (data), QSAFEBREAK); | |
9056 | break; | |
9057 | ||
9058 | case XPR_RETURN: | |
9059 | ret = exprNode_return (exprNode_effect (exprData_getSingle (data))); | |
9060 | break; | |
9061 | ||
9062 | case XPR_NULLRETURN: | |
9063 | ret = exprNode_nullReturn (exprData_getTok (data)); | |
9064 | break; | |
9065 | ||
9066 | case XPR_COMMA: | |
9067 | ret = exprNode_comma (exprNode_effect (exprData_getPairA (data)), | |
9068 | exprNode_effect (exprData_getPairB (data))); | |
9069 | break; | |
9070 | ||
9071 | case XPR_COND: | |
9072 | ret = exprNode_cond (exprNode_effect (exprData_getTriplePred (data)), | |
9073 | exprNode_effect (exprData_getTripleTrue (data)), | |
9074 | exprNode_effect (exprData_getTripleFalse (data))); | |
9075 | break; | |
9076 | case XPR_IF: | |
9077 | ret = exprNode_if (exprNode_effect (exprData_getPairA (data)), | |
9078 | exprNode_effect (exprData_getPairB (data))); | |
9079 | break; | |
9080 | ||
9081 | case XPR_IFELSE: | |
9082 | ret = exprNode_ifelse (exprNode_effect (exprData_getTriplePred (data)), | |
9083 | exprNode_effect (exprData_getTripleTrue (data)), | |
9084 | exprNode_effect (exprData_getTripleFalse (data))); | |
9085 | break; | |
9086 | case XPR_WHILEPRED: | |
9087 | ret = exprNode_whilePred (exprData_getSingle (data)); | |
9088 | break; | |
9089 | ||
9090 | case XPR_WHILE: | |
9091 | ret = exprNode_while (exprNode_effect (exprData_getPairA (data)), | |
9092 | exprNode_effect (exprData_getPairB (data))); | |
9093 | break; | |
9094 | ||
9095 | case XPR_DOWHILE: | |
9096 | ret = exprNode_doWhile (exprNode_effect (exprData_getPairA (data)), | |
9097 | exprNode_effect (exprData_getPairB (data))); | |
9098 | break; | |
9099 | ||
9100 | case XPR_BLOCK: | |
9101 | ret = exprNode_makeBlock (exprNode_effect (exprData_getSingle (data))); | |
9102 | break; | |
9103 | ||
9104 | case XPR_STMT: | |
9105 | ret = exprNode_statement (exprNode_effect (exprData_getUopNode (data)), | |
9106 | exprData_getUopTok (data)); | |
9107 | break; | |
9108 | ||
9109 | case XPR_STMTLIST: | |
9110 | ret = exprNode_concat (exprNode_effect (exprData_getPairA (data)), | |
9111 | exprNode_effect (exprData_getPairB (data))); | |
9112 | break; | |
9113 | ||
9114 | case XPR_FTCASE: | |
9115 | case XPR_CASE: | |
9116 | ret = exprNode_caseMarker | |
9117 | (exprNode_effect (exprData_getSingle (data)), | |
9118 | TRUE); | |
9119 | break; | |
9120 | ||
9121 | case XPR_FTDEFAULT: | |
9122 | case XPR_DEFAULT: | |
9123 | ret = exprNode_createTok (exprData_getTok (data)); | |
9124 | break; | |
9125 | ||
9126 | case XPR_SWITCH: | |
9127 | ret = exprNode_switch (exprNode_effect (exprData_getPairA (data)), | |
9128 | exprNode_effect (exprData_getPairB (data))); | |
9129 | break; | |
9130 | ||
9131 | case XPR_INIT: | |
9132 | ret = exprNode_makeInitialization | |
9133 | (exprData_getInitId (data), | |
9134 | exprNode_effect (exprData_getInitNode (data))); | |
9135 | break; | |
9136 | ||
9137 | case XPR_FACCESS: | |
9138 | ret = exprNode_fieldAccessAux | |
9139 | (exprNode_effect (exprData_getFieldNode (data)), | |
9140 | exprNode_loc (exprData_getFieldNode (data)), | |
9141 | cstring_copy (exprData_getFieldName (data))); | |
9142 | break; | |
9143 | ||
9144 | case XPR_ARROW: | |
9145 | ret = exprNode_arrowAccessAux | |
9146 | (exprNode_effect (exprData_getFieldNode (data)), | |
9147 | exprNode_loc (exprData_getFieldNode (data)), | |
9148 | cstring_copy (exprData_getFieldName (data))); | |
9149 | break; | |
9150 | ||
9151 | case XPR_STRINGLITERAL: | |
9152 | ret = e; | |
9153 | break; | |
9154 | ||
9155 | case XPR_NUMLIT: | |
9156 | ret = e; | |
9157 | break; | |
9158 | ||
9159 | case XPR_NODE: | |
9160 | ret = e; | |
9161 | break; | |
9162 | /*@-branchstate@*/ | |
9163 | } | |
9164 | /*@=branchstate@*/ | |
9165 | /*@=observertrans@*/ | |
9166 | /*@=exposetrans@*/ | |
9167 | /*@=dependenttrans@*/ | |
9168 | } | |
9169 | ||
9170 | if (!innerEffect) | |
9171 | { | |
9172 | inEffect = FALSE; | |
9173 | } | |
9174 | ||
9175 | return ret; | |
9176 | } | |
9177 | ||
9178 | static /*@observer@*/ cstring exprNode_rootVarName (exprNode e) | |
9179 | { | |
9180 | cstring ret; | |
9181 | exprData data; | |
9182 | ||
9183 | if (exprNode_isError (e)) | |
9184 | { | |
9185 | return cstring_undefined; | |
9186 | } | |
9187 | ||
9188 | data = e->edata; | |
9189 | ||
9190 | switch (e->kind) | |
9191 | { | |
9192 | case XPR_PARENS: | |
9193 | ret = exprNode_rootVarName (exprData_getUopNode (data)); | |
9194 | break; | |
9195 | case XPR_ASSIGN: | |
9196 | ret = exprNode_rootVarName (exprData_getOpA (data)); | |
9197 | break; | |
9198 | case XPR_CONST: | |
9199 | case XPR_VAR: | |
9200 | ret = exprData_getId (data); | |
9201 | break; | |
9202 | case XPR_INIT: | |
9203 | ret = idDecl_getName (exprData_getInitId (data)); | |
9204 | break; | |
9205 | case XPR_LABEL: | |
9206 | case XPR_TOK: | |
9207 | case XPR_ITERCALL: | |
9208 | case XPR_EMPTY: | |
9209 | case XPR_CALL: | |
9210 | case XPR_INITBLOCK: | |
9211 | case XPR_BODY: | |
9212 | case XPR_FETCH: | |
9213 | case XPR_OP: | |
9214 | case XPR_POSTOP: | |
9215 | case XPR_PREOP: | |
9216 | case XPR_OFFSETOF: | |
9217 | case XPR_ALIGNOFT: | |
9218 | case XPR_ALIGNOF: | |
9219 | case XPR_SIZEOFT: | |
9220 | case XPR_SIZEOF: | |
9221 | case XPR_VAARG: | |
9222 | case XPR_CAST: | |
9223 | case XPR_ITER: | |
9224 | case XPR_FOR: | |
9225 | case XPR_FORPRED: | |
9226 | case XPR_BREAK: | |
9227 | case XPR_RETURN: | |
9228 | case XPR_NULLRETURN: | |
9229 | case XPR_COMMA: | |
9230 | case XPR_COND: | |
9231 | case XPR_IF: | |
9232 | case XPR_IFELSE: | |
9233 | case XPR_WHILE: | |
9234 | case XPR_WHILEPRED: | |
9235 | case XPR_DOWHILE: | |
9236 | case XPR_GOTO: | |
9237 | case XPR_CONTINUE: | |
9238 | case XPR_FTDEFAULT: | |
9239 | case XPR_DEFAULT: | |
9240 | case XPR_SWITCH: | |
9241 | case XPR_FTCASE: | |
9242 | case XPR_CASE: | |
9243 | case XPR_BLOCK: | |
9244 | case XPR_STMT: | |
9245 | case XPR_STMTLIST: | |
9246 | case XPR_FACCESS: | |
9247 | case XPR_ARROW: | |
9248 | case XPR_NODE: | |
9249 | case XPR_NUMLIT: | |
9250 | case XPR_STRINGLITERAL: | |
9251 | ret = cstring_undefined; | |
9252 | break; | |
9253 | } | |
9254 | ||
9255 | return ret; | |
9256 | } | |
9257 | ||
9258 | static /*@only@*/ cstring exprNode_doUnparse (exprNode e) | |
9259 | { | |
9260 | cstring ret; | |
9261 | exprData data; | |
9262 | ||
9263 | if (exprNode_isError (e)) | |
9264 | { | |
9265 | static /*@only@*/ cstring error = cstring_undefined; | |
9266 | ||
9267 | if (!cstring_isDefined (error)) | |
9268 | { | |
9269 | error = cstring_makeLiteral ("<error>"); | |
9270 | } | |
9271 | ||
9272 | return error; | |
9273 | } | |
9274 | ||
9275 | data = e->edata; | |
9276 | ||
9277 | switch (e->kind) | |
9278 | { | |
9279 | case XPR_PARENS: | |
9280 | ret = message ("(%s)", exprNode_unparse (exprData_getUopNode (e->edata))); | |
9281 | break; | |
9282 | case XPR_ASSIGN: | |
9283 | ret = message ("%s %s %s", | |
9284 | exprNode_unparse (exprData_getOpA (data)), | |
9285 | lltok_unparse (exprData_getOpTok (data)), | |
9286 | exprNode_unparse (exprData_getOpB (data))); | |
9287 | break; | |
9288 | case XPR_CALL: | |
9289 | ret = message ("%s(%q)", | |
9290 | exprNode_unparse (exprData_getFcn (data)), | |
9291 | exprNodeList_unparse (exprData_getArgs (data))); | |
9292 | break; | |
9293 | case XPR_INITBLOCK: | |
9294 | ret = message ("{ %q }", exprNodeList_unparse (exprData_getArgs (data))); | |
9295 | break; | |
9296 | case XPR_EMPTY: | |
9297 | ret = cstring_undefined; | |
9298 | break; | |
9299 | case XPR_LABEL: | |
9300 | ret = message ("%s:", exprData_getId (data)); | |
9301 | break; | |
9302 | case XPR_CONST: | |
9303 | case XPR_VAR: | |
9304 | ret = cstring_copy (exprData_getId (data)); | |
9305 | break; | |
9306 | case XPR_FETCH: | |
9307 | ret = message ("%s[%s]", exprNode_unparse (exprData_getPairA (data)), | |
9308 | exprNode_unparse (exprData_getPairB (data))); | |
9309 | break; | |
9310 | case XPR_BODY: | |
9311 | ret = message ("<body>"); | |
9312 | break; | |
9313 | case XPR_OP: | |
9314 | ret = message ("%s %s %s", | |
9315 | exprNode_unparse (exprData_getOpA (data)), | |
9316 | lltok_unparse (exprData_getOpTok (data)), | |
9317 | exprNode_unparse (exprData_getOpB (data))); | |
9318 | break; | |
9319 | ||
9320 | case XPR_PREOP: | |
9321 | ret = message ("%s%s", | |
9322 | lltok_unparse (exprData_getUopTok (data)), | |
9323 | exprNode_unparse (exprData_getUopNode (data))); | |
9324 | break; | |
9325 | ||
9326 | case XPR_POSTOP: | |
9327 | ret = message ("%s%s", | |
9328 | exprNode_unparse (exprData_getUopNode (data)), | |
9329 | lltok_unparse (exprData_getUopTok (data))); | |
9330 | break; | |
9331 | ||
9332 | case XPR_OFFSETOF: | |
9333 | ret = message ("offsetof(%s,%q)", | |
9334 | ctype_unparse (qtype_getType (exprData_getOffsetType (data))), | |
9335 | cstringList_unparseSep (exprData_getOffsetName (data), cstring_makeLiteralTemp ("."))); | |
9336 | break; | |
9337 | ||
9338 | case XPR_SIZEOFT: | |
9339 | ret = message ("sizeof(%s)", ctype_unparse (qtype_getType (exprData_getType (data)))); | |
9340 | break; | |
9341 | ||
9342 | case XPR_SIZEOF: | |
9343 | ret = message ("sizeof(%s)", exprNode_unparse (exprData_getSingle (data))); | |
9344 | break; | |
9345 | ||
9346 | case XPR_ALIGNOFT: | |
9347 | ret = message ("alignof(%s)", ctype_unparse (qtype_getType (exprData_getType (data)))); | |
9348 | break; | |
9349 | ||
9350 | case XPR_ALIGNOF: | |
9351 | ret = message ("alignof(%s)", exprNode_unparse (exprData_getSingle (data))); | |
9352 | break; | |
9353 | ||
9354 | case XPR_VAARG: | |
9355 | ret = message ("va_arg(%s, %q)", | |
9356 | exprNode_unparse (exprData_getCastNode (data)), | |
9357 | qtype_unparse (exprData_getCastType (data))); | |
9358 | break; | |
9359 | ||
9360 | case XPR_ITERCALL: | |
9361 | ret = message ("%q(%q)", | |
9362 | uentry_getName (exprData_getIterCallIter (data)), | |
9363 | exprNodeList_unparse (exprData_getIterCallArgs (data))); | |
9364 | break; | |
9365 | case XPR_ITER: | |
9366 | ret = message ("%q(%q) %s %q", | |
9367 | uentry_getName (exprData_getIterSname (data)), | |
9368 | exprNodeList_unparse (exprData_getIterAlist (data)), | |
9369 | exprNode_unparse (exprData_getIterBody (data)), | |
9370 | uentry_getName (exprData_getIterEname (data))); | |
9371 | break; | |
9372 | case XPR_CAST: | |
9373 | ret = message ("(%q)%s", | |
9374 | qtype_unparse (exprData_getCastType (data)), | |
9375 | exprNode_unparse (exprData_getCastNode (data))); | |
9376 | break; | |
9377 | ||
9378 | case XPR_FOR: | |
9379 | ret = message ("%s %s", | |
9380 | exprNode_unparse (exprData_getPairA (data)), | |
9381 | exprNode_unparse (exprData_getPairB (data))); | |
9382 | break; | |
9383 | ||
9384 | case XPR_FORPRED: | |
9385 | ret = message ("for (%s; %s; %s)", | |
9386 | exprNode_unparse (exprData_getTripleInit (data)), | |
9387 | exprNode_unparse (exprData_getTripleTest (data)), | |
9388 | exprNode_unparse (exprData_getTripleInc (data))); | |
9389 | break; | |
9390 | ||
9391 | case XPR_GOTO: | |
9392 | ret = message ("goto %s", exprData_getLiteral (data)); | |
9393 | break; | |
9394 | ||
9395 | case XPR_CONTINUE: | |
9396 | ret = cstring_makeLiteral ("continue"); | |
9397 | break; | |
9398 | ||
9399 | case XPR_BREAK: | |
9400 | ret = cstring_makeLiteral ("break"); | |
9401 | break; | |
9402 | ||
9403 | case XPR_RETURN: | |
9404 | ret = message ("return %s", exprNode_unparse (exprData_getSingle (data))); | |
9405 | break; | |
9406 | ||
9407 | case XPR_NULLRETURN: | |
9408 | ret = cstring_makeLiteral ("return"); | |
9409 | break; | |
9410 | ||
9411 | case XPR_COMMA: | |
9412 | ret = message ("%s, %s", | |
9413 | exprNode_unparse (exprData_getPairA (data)), | |
9414 | exprNode_unparse (exprData_getPairB (data))); | |
9415 | break; | |
9416 | ||
9417 | case XPR_COND: | |
9418 | ret = message ("%s ? %s : %s", | |
9419 | exprNode_unparse (exprData_getTriplePred (data)), | |
9420 | exprNode_unparse (exprData_getTripleTrue (data)), | |
9421 | exprNode_unparse (exprData_getTripleFalse (data))); | |
9422 | break; | |
9423 | case XPR_IF: | |
9424 | ret = message ("if (%s) %s", | |
9425 | exprNode_unparse (exprData_getPairA (data)), | |
9426 | exprNode_unparse (exprData_getPairB (data))); | |
9427 | break; | |
9428 | ||
9429 | case XPR_IFELSE: | |
9430 | ret = message ("if (%s) %s else %s", | |
9431 | exprNode_unparse (exprData_getTriplePred (data)), | |
9432 | exprNode_unparse (exprData_getTripleTrue (data)), | |
9433 | exprNode_unparse (exprData_getTripleFalse (data))); | |
9434 | break; | |
9435 | case XPR_WHILE: | |
9436 | ret = message ("while (%s) %s", | |
9437 | exprNode_unparse (exprData_getPairA (data)), | |
9438 | exprNode_unparse (exprData_getPairB (data))); | |
9439 | break; | |
9440 | ||
9441 | case XPR_WHILEPRED: | |
9442 | ret = cstring_copy (exprNode_unparse (exprData_getSingle (data))); | |
9443 | break; | |
9444 | ||
9445 | case XPR_TOK: | |
9446 | ret = cstring_copy (lltok_unparse (exprData_getTok (data))); | |
9447 | break; | |
9448 | ||
9449 | case XPR_DOWHILE: | |
9450 | ret = message ("do { %s } while (%s)", | |
9451 | exprNode_unparse (exprData_getPairB (data)), | |
9452 | exprNode_unparse (exprData_getPairA (data))); | |
9453 | break; | |
9454 | ||
9455 | case XPR_BLOCK: | |
9456 | ret = message ("{ %s }", exprNode_unparseFirst (exprData_getSingle (data))); | |
9457 | break; | |
9458 | ||
9459 | case XPR_STMT: | |
9460 | ret = cstring_copy (exprNode_unparse (exprData_getUopNode (data))); | |
9461 | break; | |
9462 | ||
9463 | case XPR_STMTLIST: | |
9464 | ret = message ("%s; %s", | |
9465 | exprNode_unparse (exprData_getPairA (data)), | |
9466 | exprNode_unparse (exprData_getPairB (data))); | |
9467 | break; | |
9468 | ||
9469 | case XPR_FTDEFAULT: | |
9470 | case XPR_DEFAULT: | |
9471 | ret = cstring_makeLiteral ("default:"); | |
9472 | break; | |
9473 | ||
9474 | case XPR_SWITCH: | |
9475 | ret = message ("switch (%s) %s", | |
9476 | exprNode_unparse (exprData_getPairA (data)), | |
9477 | exprNode_unparse (exprData_getPairB (data))); | |
9478 | break; | |
9479 | ||
9480 | case XPR_FTCASE: | |
9481 | case XPR_CASE: | |
9482 | ret = message ("case %s:", | |
9483 | exprNode_unparse (exprData_getSingle (data))); | |
9484 | break; | |
9485 | ||
9486 | case XPR_INIT: | |
9487 | if (exprNode_isError (exprData_getInitNode (data))) | |
9488 | { | |
9489 | ret = message ("%q", idDecl_unparseC (exprData_getInitId (data))); | |
9490 | } | |
9491 | else | |
9492 | { | |
9493 | ret = message ("%q = %s", | |
9494 | idDecl_unparseC (exprData_getInitId (data)), | |
9495 | exprNode_unparse (exprData_getInitNode (data))); | |
9496 | } | |
9497 | break; | |
9498 | ||
9499 | case XPR_FACCESS: | |
9500 | ret = message ("%s.%s", | |
9501 | exprNode_unparse (exprData_getFieldNode (data)), | |
9502 | exprData_getFieldName (data)); | |
9503 | break; | |
9504 | ||
9505 | case XPR_ARROW: | |
9506 | ret = message ("%s->%s", | |
9507 | exprNode_unparse (exprData_getFieldNode (data)), | |
9508 | exprData_getFieldName (data)); | |
9509 | break; | |
9510 | ||
9511 | case XPR_STRINGLITERAL: | |
9512 | if (ctype_isWideString (e->typ)) | |
9513 | { | |
9514 | ret = message ("L\"%s\"", exprData_getLiteral (data)); | |
9515 | } | |
9516 | else | |
9517 | { | |
9518 | ret = message ("\"%s\"", exprData_getLiteral (data)); | |
9519 | } | |
9520 | break; | |
9521 | ||
9522 | case XPR_NUMLIT: | |
9523 | ret = cstring_copy (exprData_getLiteral (data)); | |
9524 | break; | |
9525 | ||
9526 | case XPR_NODE: | |
9527 | ret = cstring_makeLiteral ("<node>"); | |
9528 | break; | |
9529 | } | |
9530 | ||
9531 | return ret; | |
9532 | } | |
9533 | ||
9534 | bool | |
9535 | exprNode_isInitializer (exprNode e) | |
9536 | { | |
9537 | return (exprNode_isDefined (e) | |
9538 | && e->kind == XPR_INIT); | |
9539 | } | |
9540 | ||
9541 | bool | |
9542 | exprNode_isCharLit (exprNode e) | |
9543 | { | |
9544 | if (exprNode_isDefined (e)) | |
9545 | { | |
9546 | return (multiVal_isChar (exprNode_getValue (e))); | |
9547 | } | |
9548 | else | |
9549 | { | |
9550 | return FALSE; | |
9551 | } | |
9552 | } | |
9553 | ||
9554 | bool | |
9555 | exprNode_isNumLit (exprNode e) | |
9556 | { | |
9557 | if (exprNode_isDefined (e)) | |
9558 | { | |
9559 | return (multiVal_isInt (exprNode_getValue (e))); | |
9560 | } | |
9561 | else | |
9562 | { | |
9563 | return FALSE; | |
9564 | } | |
9565 | } | |
9566 | ||
9567 | static bool | |
9568 | exprNode_isFalseConstant (exprNode e) | |
9569 | { | |
9570 | if (exprNode_isDefined (e)) | |
9571 | { | |
9572 | cstring s = exprNode_rootVarName (e); | |
9573 | ||
9574 | if (cstring_equal (s, context_getFalseName ())) | |
9575 | { | |
9576 | return TRUE; | |
9577 | } | |
9578 | } | |
9579 | ||
9580 | return FALSE; | |
9581 | } | |
9582 | ||
9583 | bool | |
9584 | exprNode_matchLiteral (ctype expected, exprNode e) | |
9585 | { | |
9586 | if (exprNode_isDefined (e)) | |
9587 | { | |
9588 | multiVal m = exprNode_getValue (e); | |
9589 | ||
9590 | if (multiVal_isDefined (m)) | |
9591 | { | |
9592 | if (multiVal_isInt (m)) | |
9593 | { | |
9594 | long int val = multiVal_forceInt (m); | |
9595 | ||
9596 | if (ctype_isDirectBool (ctype_realishType (expected))) | |
9597 | { | |
9598 | if (val == 0) | |
9599 | { | |
9600 | return FALSE; /* really?! return TRUE; allow use of 0 for FALSE */ | |
9601 | } | |
9602 | else | |
9603 | { | |
9604 | return FALSE; | |
9605 | } | |
9606 | } | |
9607 | ||
9608 | if (ctype_isRealInt (expected)) | |
9609 | { | |
9610 | /* | |
9611 | ** unsigned <- [ constant >= 0 is okay ] | |
9612 | */ | |
9613 | ||
9614 | if (ctype_isUnsigned (expected)) | |
9615 | { | |
9616 | if (val < 0) | |
9617 | { | |
9618 | return FALSE; | |
9619 | } | |
9620 | } | |
9621 | ||
9622 | /* | |
9623 | ** No checks on sizes of integers...maybe add | |
9624 | ** these later. | |
9625 | */ | |
9626 | ||
9627 | DPRINTF (("Here: %s => %s", exprNode_unparse (e), ctype_unparse (expected))); | |
9628 | DPRINTF (("Type: %s / %s", ctype_unparse (exprNode_getType (e)), | |
9629 | bool_unparse (ctype_isInt (exprNode_getType (e))))); | |
9630 | ||
9631 | if (context_getFlag (FLG_NUMLITERAL) | |
9632 | && (ctype_isRegularInt (exprNode_getType (e)) || val == 0)) { | |
9633 | return TRUE; | |
9634 | } else { | |
9635 | if (val == 0) { | |
9636 | return TRUE; | |
9637 | } else { | |
9638 | return FALSE; /* evs 2000-05-17: previously, always returned TRUE */ | |
9639 | } | |
9640 | } | |
9641 | } | |
9642 | else if (ctype_isChar (expected)) | |
9643 | { | |
9644 | return FALSE; | |
9645 | } | |
9646 | else if (ctype_isArrayPtr (expected)) | |
9647 | { | |
9648 | /* | |
9649 | ** evans 2001-10-14: We allow 0 to match any pointer, but only if the type matches or is void *. | |
9650 | */ | |
9651 | ||
9652 | if (val == 0) | |
9653 | { | |
9654 | if (ctype_match (exprNode_getType (e), expected) | |
9655 | || ctype_isVoidPointer (exprNode_getType (e))) | |
9656 | { | |
9657 | return TRUE; | |
9658 | } | |
9659 | } | |
9660 | else | |
9661 | { | |
9662 | return FALSE; | |
9663 | } | |
9664 | } | |
9665 | else if (ctype_isAnyFloat (expected)) | |
9666 | { | |
9667 | return (context_getFlag (FLG_NUMLITERAL)); | |
9668 | } | |
9669 | else | |
9670 | { | |
9671 | return FALSE; | |
9672 | } | |
9673 | } | |
9674 | else if (multiVal_isDouble (m)) | |
9675 | { | |
9676 | if (ctype_isAnyFloat (expected)) | |
9677 | { | |
9678 | return TRUE; | |
9679 | } | |
9680 | } | |
9681 | else if (multiVal_isChar (m)) | |
9682 | { | |
9683 | char val = multiVal_forceChar (m); | |
9684 | ||
9685 | if (ctype_isChar (expected)) | |
9686 | { | |
9687 | if (ctype_isUnsigned (expected) && ((int)val) < 0) | |
9688 | { | |
9689 | return FALSE; | |
9690 | } | |
9691 | else | |
9692 | { | |
9693 | return TRUE; | |
9694 | } | |
9695 | } | |
9696 | } | |
9697 | else | |
9698 | { | |
9699 | return FALSE; | |
9700 | } | |
9701 | } | |
9702 | } | |
9703 | ||
9704 | return FALSE; | |
9705 | } | |
9706 | ||
9707 | bool | |
9708 | exprNode_matchType (ctype expected, exprNode e) | |
9709 | { | |
9710 | ctype actual; | |
9711 | ||
9712 | if (!exprNode_isDefined (e)) return TRUE; | |
9713 | ||
9714 | actual = ctype_realishType (exprNode_getType (e)); | |
9715 | ||
9716 | if (ctype_match (ctype_realishType (expected), actual)) | |
9717 | { | |
9718 | return TRUE; | |
9719 | } | |
9720 | ||
9721 | llassert (!exprNode_isError (e)); | |
9722 | return (exprNode_matchLiteral (expected, e)); | |
9723 | } | |
9724 | ||
9725 | static bool | |
9726 | exprNode_matchTypes (exprNode e1, exprNode e2) | |
9727 | { | |
9728 | ctype t1; | |
9729 | ctype t2; | |
9730 | ||
9731 | if (!exprNode_isDefined (e1)) return TRUE; | |
9732 | if (!exprNode_isDefined (e2)) return TRUE; | |
9733 | ||
9734 | /* | |
9735 | ** realish type --- keep bools, bools | |
9736 | */ | |
9737 | ||
9738 | t1 = ctype_realishType (exprNode_getType (e1)); | |
9739 | t2 = ctype_realishType (exprNode_getType (e2)); | |
9740 | ||
9741 | if (ctype_match (t1, t2)) | |
9742 | { | |
9743 | return TRUE; | |
9744 | } | |
9745 | ||
9746 | DPRINTF (("Matching literal! %s %s %s %s", | |
9747 | ctype_unparse (t1), exprNode_unparse (e2), | |
9748 | ctype_unparse (t2), exprNode_unparse (e1))); | |
9749 | ||
9750 | return (exprNode_matchLiteral (t1, e2) || exprNode_matchLiteral (t2, e1)); | |
9751 | } | |
9752 | ||
9753 | /* | |
9754 | ** pass e as ct | |
9755 | */ | |
9756 | ||
9757 | static bool | |
9758 | exprNode_matchArgType (ctype ct, exprNode e) | |
9759 | { | |
9760 | ctype et; | |
9761 | ||
9762 | if (!exprNode_isDefined (e)) | |
9763 | { | |
9764 | return TRUE; | |
9765 | } | |
9766 | ||
9767 | et = ctype_realType (exprNode_getType (e)); | |
9768 | ||
9769 | if (ctype_matchArg (ct, et)) return TRUE; | |
9770 | ||
9771 | llassert (!exprNode_isError (e)); | |
9772 | return (exprNode_matchLiteral (ct, e)); | |
9773 | } | |
9774 | ||
9775 | static /*@only@*/ exprNodeSList | |
9776 | exprNode_flatten (/*@dependent@*/ exprNode e) /*@*/ | |
9777 | { | |
9778 | if (exprNode_isDefined (e)) | |
9779 | { | |
9780 | if (e->kind == XPR_STMTLIST) | |
9781 | { | |
9782 | return (exprNodeSList_append | |
9783 | (exprNode_flatten (exprData_getPairA (e->edata)), | |
9784 | exprNode_flatten (exprData_getPairB (e->edata)))); | |
9785 | } | |
9786 | else if (e->kind == XPR_BLOCK) | |
9787 | { | |
9788 | return (exprNode_flatten (exprData_getSingle (e->edata))); | |
9789 | } | |
9790 | else | |
9791 | { | |
9792 | return (exprNodeSList_singleton (e)); | |
9793 | } | |
9794 | } | |
9795 | ||
9796 | return exprNodeSList_new (); | |
9797 | } | |
9798 | ||
9799 | static /*@exposed@*/ exprNode | |
9800 | exprNode_lastStatement (/*@returned@*/ exprNode e) | |
9801 | { | |
9802 | if (exprNode_isDefined (e)) | |
9803 | { | |
9804 | if (e->kind == XPR_STMTLIST) | |
9805 | { | |
9806 | exprNode b = exprData_getPairB (e->edata); | |
9807 | ||
9808 | if (exprNode_isDefined (b)) | |
9809 | { | |
9810 | return exprNode_lastStatement (b); | |
9811 | } | |
9812 | else | |
9813 | { | |
9814 | return exprNode_lastStatement (exprData_getPairA (e->edata)); | |
9815 | } | |
9816 | } | |
9817 | else if (e->kind == XPR_BLOCK) | |
9818 | { | |
9819 | return (exprNode_lastStatement (exprData_getSingle (e->edata))); | |
9820 | } | |
9821 | else | |
9822 | { | |
9823 | return (e); | |
9824 | } | |
9825 | } | |
9826 | ||
9827 | return exprNode_undefined; | |
9828 | } | |
9829 | ||
9830 | static /*@exposed@*/ exprNode | |
9831 | exprNode_firstStatement (/*@returned@*/ exprNode e) | |
9832 | { | |
9833 | if (exprNode_isDefined (e)) | |
9834 | { | |
9835 | if (e->kind == XPR_STMTLIST) | |
9836 | { | |
9837 | exprNode b = exprData_getPairA (e->edata); | |
9838 | ||
9839 | if (exprNode_isDefined (b)) | |
9840 | { | |
9841 | return exprNode_firstStatement (b); | |
9842 | } | |
9843 | else | |
9844 | { | |
9845 | return exprNode_firstStatement (exprData_getPairB (e->edata)); | |
9846 | } | |
9847 | } | |
9848 | else if (e->kind == XPR_BLOCK) | |
9849 | { | |
9850 | return (exprNode_firstStatement (exprData_getSingle (e->edata))); | |
9851 | } | |
9852 | else | |
9853 | { | |
9854 | return (e); | |
9855 | } | |
9856 | } | |
9857 | ||
9858 | return exprNode_undefined; | |
9859 | } | |
9860 | ||
9861 | static void | |
9862 | exprNode_mergeUSs (exprNode res, exprNode other) | |
9863 | { | |
9864 | if (exprNode_isDefined (res) && exprNode_isDefined (other)) | |
9865 | { | |
9866 | res->msets = sRefSet_union (res->msets, other->msets); | |
9867 | res->sets = sRefSet_union (res->sets, other->sets); | |
9868 | res->uses = sRefSet_union (res->uses, other->uses); | |
9869 | } | |
9870 | } | |
9871 | ||
9872 | static void | |
9873 | exprNode_mergeCondUSs (exprNode res, exprNode other1, exprNode other2) | |
9874 | { | |
9875 | if (exprNode_isDefined (res)) | |
9876 | { | |
9877 | if (exprNode_isDefined (other1)) | |
9878 | { | |
9879 | res->sets = sRefSet_union (res->sets, other1->sets); | |
9880 | res->msets = sRefSet_union (res->msets, other1->msets); | |
9881 | res->uses = sRefSet_union (res->uses, other1->uses); | |
9882 | } | |
9883 | if (exprNode_isDefined (other2)) | |
9884 | { | |
9885 | res->sets = sRefSet_union (res->sets, other2->sets); | |
9886 | res->msets = sRefSet_union (res->msets, other2->msets); | |
9887 | res->uses = sRefSet_union (res->uses, other2->uses); | |
9888 | } | |
9889 | } | |
9890 | } | |
9891 | ||
9892 | /* | |
9893 | ** modifies e->uses | |
9894 | ** | |
9895 | ** Reports errors is s is not defined. | |
9896 | */ | |
9897 | ||
9898 | static void | |
9899 | exprNode_addUse (exprNode e, /*@exposed@*/ sRef s) | |
9900 | { | |
9901 | if (exprNode_isDefined (e)) | |
9902 | { | |
9903 | e->uses = sRefSet_insert (e->uses, s); | |
9904 | } | |
9905 | } | |
9906 | ||
9907 | void | |
9908 | exprNode_checkUse (exprNode e, /*@exposed@*/ sRef s, fileloc loc) | |
9909 | { | |
9910 | if (sRef_isKnown (s) && !sRef_isConst (s)) | |
9911 | { | |
9912 | /* | |
9913 | ** need to check all outer types are useable | |
9914 | */ | |
9915 | ||
9916 | DPRINTF (("Check use: %s / %s", | |
9917 | exprNode_unparse (e), sRef_unparse (s))); | |
9918 | ||
9919 | exprNode_addUse (e, s); | |
9920 | ||
9921 | if (!context_inProtectVars ()) | |
9922 | { | |
9923 | /* | |
9924 | ** only report the deepest error | |
9925 | */ | |
9926 | ||
9927 | sRef errorRef = sRef_undefined; | |
9928 | sRef lastRef = sRef_undefined; | |
9929 | bool deadRef = FALSE; | |
9930 | bool unuseable = FALSE; | |
9931 | bool errorMaybe = FALSE; | |
9932 | ||
9933 | while (sRef_isValid (s) && sRef_isKnown (s)) | |
9934 | { | |
9935 | ynm readable = sRef_isValidLvalue (s); | |
9936 | ||
9937 | DPRINTF (("Readable: %s / %s", | |
9938 | sRef_unparseFull (s), ynm_unparse (readable))); | |
9939 | ||
9940 | if (!(ynm_toBoolStrict (readable))) | |
9941 | { | |
9942 | if (ynm_isMaybe (readable)) | |
9943 | { | |
9944 | lastRef = errorRef; | |
9945 | errorRef = s; | |
9946 | DPRINTF (("Setting ERROR: %s", sRef_unparseFull (s))); | |
9947 | deadRef = sRef_isPossiblyDead (errorRef); | |
9948 | unuseable = sRef_isUnuseable (errorRef); | |
9949 | errorMaybe = TRUE; | |
9950 | } | |
9951 | else | |
9952 | { | |
9953 | lastRef = errorRef; | |
9954 | errorRef = s; | |
9955 | deadRef = sRef_isDead (errorRef); | |
9956 | unuseable = sRef_isUnuseable (errorRef); | |
9957 | errorMaybe = FALSE; | |
9958 | } | |
9959 | ||
9960 | if (!sRef_isPartial (s)) | |
9961 | { | |
9962 | DPRINTF (("Defining! %s", sRef_unparseFull (s))); | |
9963 | sRef_setDefined (s, fileloc_undefined); | |
9964 | } | |
9965 | } | |
9966 | ||
9967 | s = sRef_getBaseSafe (s); | |
9968 | } /* end while */ | |
9969 | ||
9970 | if (sRef_isValid (errorRef)) | |
9971 | { | |
9972 | if (sRef_isValid (lastRef) && sRef_isField (lastRef) | |
9973 | && sRef_isPointer (errorRef)) | |
9974 | { | |
9975 | errorRef = lastRef; | |
9976 | } | |
9977 | ||
9978 | if (deadRef) | |
9979 | { | |
9980 | if (sRef_isThroughArrayFetch (errorRef)) | |
9981 | { | |
9982 | if (optgenerror | |
9983 | (FLG_STRICTUSERELEASED, | |
9984 | message ("%q %q may be used after being released", | |
9985 | sRef_unparseKindNamePlain (errorRef), | |
9986 | sRef_unparse (errorRef)), | |
9987 | loc)) | |
9988 | { | |
9989 | sRef_showRefKilled (errorRef); | |
9990 | ||
9991 | if (sRef_isKept (errorRef)) | |
9992 | { | |
9993 | sRef_clearAliasState (errorRef, loc); | |
9994 | } | |
9995 | } | |
9996 | } | |
9997 | else | |
9998 | { | |
9999 | DPRINTF (("HERE: %s", sRef_unparse (errorRef))); | |
10000 | ||
10001 | if (optgenerror | |
10002 | (FLG_USERELEASED, | |
10003 | message ("%q %q %qused after being released", | |
10004 | sRef_unparseKindNamePlain (errorRef), | |
10005 | sRef_unparse (errorRef), | |
10006 | cstring_makeLiteral (errorMaybe | |
10007 | ? "may be " : "")), | |
10008 | loc)) | |
10009 | { | |
10010 | sRef_showRefKilled (errorRef); | |
10011 | ||
10012 | if (sRef_isKept (errorRef)) | |
10013 | { | |
10014 | sRef_clearAliasState (errorRef, loc); | |
10015 | } | |
10016 | } | |
10017 | } | |
10018 | } | |
10019 | else if (unuseable) | |
10020 | { | |
10021 | if (optgenerror | |
10022 | (FLG_USEDEF, | |
10023 | message ("%q %q%qused in inconsistent state", | |
10024 | sRef_unparseKindName (errorRef), | |
10025 | sRef_unparseOpt (errorRef), | |
10026 | cstring_makeLiteral (errorMaybe ? "may be " : "")), | |
10027 | loc)) | |
10028 | { | |
10029 | sRef_showStateInconsistent (errorRef); | |
10030 | } | |
10031 | } | |
10032 | else | |
10033 | { | |
10034 | DPRINTF (("HERE: %s", sRef_unparseFull (errorRef))); | |
10035 | ||
10036 | voptgenerror | |
10037 | (FLG_USEDEF, | |
10038 | message ("%q %q%qused before definition", | |
10039 | sRef_unparseKindName (errorRef), | |
10040 | sRef_unparseOpt (errorRef), | |
10041 | cstring_makeLiteral (errorMaybe ? "may be " : "")), | |
10042 | loc); | |
10043 | ||
10044 | DPRINTF (("Error: %s", sRef_unparseFull (errorRef))); | |
10045 | } | |
10046 | ||
10047 | sRef_setDefined (errorRef, loc); | |
10048 | ||
10049 | if (sRef_isAddress (errorRef)) | |
10050 | { | |
10051 | sRef_setDefined (sRef_getRootBase (errorRef), loc); | |
10052 | } | |
10053 | } /* end is error */ | |
10054 | } | |
10055 | } | |
10056 | ||
10057 | setCodePoint (); | |
10058 | } | |
10059 | ||
10060 | static void | |
10061 | checkSafeUse (exprNode e, /*@exposed@*/ sRef s) | |
10062 | { | |
10063 | if (exprNode_isDefined (e) && sRef_isKnown (s)) | |
10064 | { | |
10065 | e->uses = sRefSet_insert (e->uses, s); | |
10066 | } | |
10067 | } | |
10068 | ||
10069 | static void | |
10070 | exprNode_checkSetAny (exprNode e, /*@dependent@*/ cstring name) | |
10071 | { | |
10072 | if (exprNode_isDefined (e)) | |
10073 | { | |
10074 | e->sets = sRefSet_insert (e->sets, sRef_makeUnconstrained (name)); | |
10075 | } | |
10076 | } | |
10077 | ||
10078 | void | |
10079 | exprNode_checkSet (exprNode e, /*@exposed@*/ sRef s) | |
10080 | { | |
10081 | sRef defines = sRef_undefined; | |
10082 | ||
10083 | if (sRef_isValid (s) && !sRef_isNothing (s)) | |
10084 | { | |
10085 | uentry ue = sRef_getBaseUentry (s); | |
10086 | ||
10087 | if (uentry_isValid (ue)) | |
10088 | { | |
10089 | uentry_setLset (ue); | |
10090 | } | |
10091 | ||
10092 | if (!ynm_toBoolStrict (sRef_isWriteable (s))) | |
10093 | { | |
10094 | voptgenerror (FLG_USEDEF, | |
10095 | message ("Attempt to set unuseable storage: %q", | |
10096 | sRef_unparse (s)), | |
10097 | exprNode_loc (e)); | |
10098 | } | |
10099 | ||
10100 | if (sRef_isMeaningful (s)) | |
10101 | { | |
10102 | if (sRef_isDead (s)) | |
10103 | { | |
10104 | sRef base = sRef_getBaseSafe (s); | |
10105 | ||
10106 | if (sRef_isValid (base) | |
10107 | && sRef_isDead (base)) | |
10108 | { | |
10109 | sRef_setPartial (s, exprNode_loc (e)); | |
10110 | } | |
10111 | ||
10112 | defines = s; /* okay - modifies for only param */ | |
10113 | } | |
10114 | else if (sRef_isPartial (s)) | |
10115 | { | |
10116 | sRef eref = exprNode_getSref (e); | |
10117 | ||
10118 | if (!sRef_isPartial (eref)) | |
10119 | { | |
10120 | /* | |
10121 | ** should do something different here??? | |
10122 | */ | |
10123 | ||
10124 | sRef_setDefinedComplete (eref, exprNode_loc (e)); | |
10125 | } | |
10126 | else | |
10127 | { | |
10128 | sRef_setPartialDefinedComplete (eref, exprNode_loc (e)); | |
10129 | } | |
10130 | ||
10131 | if (sRef_isMeaningful (eref)) | |
10132 | { | |
10133 | defines = eref; | |
10134 | } | |
10135 | else | |
10136 | { | |
10137 | defines = s; | |
10138 | } | |
10139 | } | |
10140 | else if (sRef_isAllocated (s)) | |
10141 | { | |
10142 | sRef eref = exprNode_getSref (e); | |
10143 | ||
10144 | ||
10145 | if (!sRef_isAllocated (eref)) | |
10146 | { | |
10147 | sRef_setDefinedComplete (eref, exprNode_loc (e)); | |
10148 | } | |
10149 | else | |
10150 | { | |
10151 | sRef base = sRef_getBaseSafe (eref); | |
10152 | ||
10153 | if (sRef_isValid (base)) | |
10154 | { | |
10155 | sRef_setPdefined (base, exprNode_loc (e)); | |
10156 | } | |
10157 | } | |
10158 | ||
10159 | defines = s; | |
10160 | } | |
10161 | else | |
10162 | { | |
10163 | sRef_setDefinedNCComplete (s, exprNode_loc (e)); | |
10164 | defines = s; | |
10165 | } | |
10166 | ||
10167 | } | |
10168 | else /* not meaningful...but still need to insert it */ | |
10169 | { | |
10170 | defines = s; | |
10171 | } | |
10172 | } | |
10173 | ||
10174 | if (exprNode_isDefined (e) && sRef_isValid (defines)) | |
10175 | { | |
10176 | e->sets = sRefSet_insert (e->sets, defines); | |
10177 | } | |
10178 | } | |
10179 | ||
10180 | void | |
10181 | exprNode_checkMSet (exprNode e, /*@exposed@*/ sRef s) | |
10182 | { | |
10183 | if (sRef_isValid (s) && !sRef_isNothing (s)) | |
10184 | { | |
10185 | uentry ue = sRef_getBaseUentry (s); | |
10186 | ||
10187 | if (uentry_isValid (ue)) | |
10188 | { | |
10189 | uentry_setLset (ue); | |
10190 | } | |
10191 | ||
10192 | if (!ynm_toBoolStrict (sRef_isWriteable (s))) | |
10193 | { | |
10194 | voptgenerror (FLG_USEDEF, | |
10195 | message ("Attempt to set unuseable storage: %q", sRef_unparse (s)), | |
10196 | exprNode_loc (e)); | |
10197 | } | |
10198 | ||
10199 | if (sRef_isMeaningful (s)) | |
10200 | { | |
10201 | sRef_setDefinedComplete (s, exprNode_loc (e)); | |
10202 | } | |
10203 | ||
10204 | if (exprNode_isDefined (e)) | |
10205 | { | |
10206 | e->msets = sRefSet_insert (e->msets, s); | |
10207 | } | |
10208 | } | |
10209 | } | |
10210 | ||
10211 | static void | |
10212 | checkUnspecCall (/*@notnull@*/ /*@dependent@*/ exprNode fcn, uentryList params, exprNodeList args) | |
10213 | { | |
10214 | checkAnyCall (fcn, cstring_undefined, params, args, | |
10215 | FALSE, sRefSet_undefined, FALSE, 0); | |
10216 | } | |
10217 | ||
10218 | static void | |
10219 | checkOneArg (uentry ucurrent, /*@notnull@*/ exprNode current, | |
10220 | /*@dependent@*/ exprNode fcn, bool isSpec, int argno, int totargs) | |
10221 | { | |
10222 | setCodePoint (); | |
10223 | ||
10224 | if (uentry_isYield (ucurrent)) | |
10225 | { | |
10226 | sRef_setDefined (exprNode_getSref (current), exprNode_loc (current)); | |
10227 | exprNode_checkSet (current, current->sref); | |
10228 | } | |
10229 | else | |
10230 | { | |
10231 | if (uentry_isSefParam (ucurrent)) | |
10232 | { | |
10233 | sRefSet sets = current->sets; | |
10234 | sRef ref = exprNode_getSref (current); | |
10235 | ||
10236 | if (sRef_isMacroParamRef (ref)) | |
10237 | { | |
10238 | uentry ue = sRef_getUentry (ref); | |
10239 | ||
10240 | if (!uentry_isSefParam (ue)) | |
10241 | { | |
10242 | voptgenerror | |
10243 | (FLG_SEFPARAMS, | |
10244 | message | |
10245 | ("Parameter %d to %s is declared sef, but " | |
10246 | "the argument is a macro parameter declared " | |
10247 | "without sef: %s", | |
10248 | argno, exprNode_unparse (fcn), | |
10249 | exprNode_unparse (current)), | |
10250 | exprNode_loc (current)); | |
10251 | } | |
10252 | } | |
10253 | ||
10254 | if (!sRefSet_isEmpty (sets)) | |
10255 | { | |
10256 | sRefSet reported = sRefSet_undefined; | |
10257 | ||
10258 | sRefSet_realElements (current->sets, el) | |
10259 | { | |
10260 | if (sRefSet_isSameNameMember (reported, el)) | |
10261 | { | |
10262 | ; /* don't report again */ | |
10263 | } | |
10264 | else | |
10265 | { | |
10266 | if (sRef_isUnconstrained (el)) | |
10267 | { | |
10268 | voptgenerror | |
10269 | (FLG_SEFUNSPEC, | |
10270 | message | |
10271 | ("Parameter %d to %s is declared sef, but " | |
10272 | "the argument calls unconstrained function %s " | |
10273 | "(no guarantee it will not modify something): %s", | |
10274 | argno, exprNode_unparse (fcn), | |
10275 | sRef_unconstrainedName (el), | |
10276 | exprNode_unparse (current)), | |
10277 | exprNode_loc (current)); | |
10278 | } | |
10279 | else | |
10280 | { | |
10281 | voptgenerror | |
10282 | (FLG_SEFPARAMS, | |
10283 | message | |
10284 | ("Parameter %d to %s is declared sef, but " | |
10285 | "the argument may modify %q: %s", | |
10286 | argno, exprNode_unparse (fcn), | |
10287 | sRef_unparse (el), | |
10288 | exprNode_unparse (current)), | |
10289 | exprNode_loc (current)); | |
10290 | } | |
10291 | } | |
10292 | } end_sRefSet_realElements; | |
10293 | } | |
10294 | } | |
10295 | ||
10296 | transferChecks_passParam (current, ucurrent, isSpec, fcn, argno, totargs); | |
10297 | exprNode_mergeUSs (fcn, current); | |
10298 | } | |
10299 | } | |
10300 | ||
10301 | static void | |
10302 | checkAnyCall (/*@dependent@*/ exprNode fcn, | |
10303 | /*@dependent@*/ cstring fname, | |
10304 | uentryList pn, | |
10305 | exprNodeList args, | |
10306 | bool hasMods, sRefSet mods, | |
10307 | bool isSpec, | |
10308 | int specialArgs) | |
10309 | { | |
10310 | int paramno = 0; | |
10311 | int nargs = exprNodeList_size (args); | |
10312 | ||
10313 | setCodePoint (); | |
10314 | ||
10315 | /* | |
10316 | ** concat all args ud's to f, add each arg sref as a use unless | |
10317 | ** it was specified as "out", in which case it is a def. | |
10318 | */ | |
10319 | ||
10320 | uentryList_reset (pn); | |
10321 | ||
10322 | /* | |
10323 | ** aliasing checks: | |
10324 | ** | |
10325 | ** if paramn is only or unique, no other arg may alias argn | |
10326 | */ | |
10327 | ||
10328 | exprNodeList_elements (args, current) | |
10329 | { | |
10330 | paramno++; | |
10331 | ||
10332 | if (exprNode_isDefined (current)) | |
10333 | { | |
10334 | if ((!uentryList_isUndefined (pn) && !uentryList_isFinished (pn))) | |
10335 | { | |
10336 | uentry ucurrent = uentryList_current (pn); | |
10337 | ||
10338 | if (specialArgs == 0 | |
10339 | || (paramno < specialArgs)) | |
10340 | { | |
10341 | checkOneArg (ucurrent, current, fcn, isSpec, paramno, nargs); | |
10342 | ||
10343 | if (context_maybeSet (FLG_ALIASUNIQUE)) | |
10344 | { | |
10345 | if (uentry_isOnly (ucurrent) | |
10346 | || uentry_isUnique (ucurrent)) | |
10347 | { | |
10348 | checkUniqueParams (fcn, current, args, | |
10349 | paramno, ucurrent); | |
10350 | } | |
10351 | } | |
10352 | } | |
10353 | } | |
10354 | else /* uentry is undefined */ | |
10355 | { | |
10356 | if (specialArgs == 0) | |
10357 | { | |
10358 | exprNode_checkUseParam (current); | |
10359 | } | |
10360 | ||
10361 | exprNode_mergeUSs (fcn, current); | |
10362 | } | |
10363 | } | |
10364 | uentryList_advanceSafe (pn); | |
10365 | } end_exprNodeList_elements; | |
10366 | ||
10367 | if (hasMods) | |
10368 | { | |
10369 | setCodePoint (); | |
10370 | ||
10371 | sRefSet_allElements (mods, s) | |
10372 | { | |
10373 | sRef fb; | |
10374 | sRef rb = sRef_getRootBase (s); | |
10375 | ||
10376 | if (sRef_isFileOrGlobalScope (rb)) | |
10377 | { | |
10378 | context_usedGlobal (rb); | |
10379 | } | |
10380 | ||
10381 | fb = sRef_fixBaseParam (s, args); | |
10382 | ||
10383 | if (!sRef_isMacroParamRef (fb)) | |
10384 | { | |
10385 | if (sRef_isNothing (fb)) | |
10386 | { | |
10387 | ; | |
10388 | } | |
10389 | else | |
10390 | { | |
10391 | if (sRef_isValid (fb)) | |
10392 | { | |
10393 | uentry ue = sRef_getBaseUentry (s); | |
10394 | ||
10395 | if (uentry_isValid (ue)) | |
10396 | { | |
10397 | uentry_setLset (ue); | |
10398 | } | |
10399 | } | |
10400 | ||
10401 | fcn->sets = sRefSet_insert (fcn->sets, fb); | |
10402 | } | |
10403 | } | |
10404 | sRef_clearDerivedComplete (s); | |
10405 | } end_sRefSet_allElements; | |
10406 | ||
10407 | setCodePoint (); | |
10408 | } | |
10409 | else | |
10410 | { | |
10411 | if (context_hasMods ()) | |
10412 | { | |
10413 | if (context_maybeSet (FLG_MODUNCON)) | |
10414 | { | |
10415 | voptgenerror | |
10416 | (FLG_MODUNCON, | |
10417 | message ("Undetected modification possible " | |
10418 | "from call to unconstrained function %s: %s", | |
10419 | fname, | |
10420 | exprNode_unparse (fcn)), | |
10421 | exprNode_loc (fcn)); | |
10422 | } | |
10423 | } | |
10424 | else | |
10425 | { | |
10426 | if (context_maybeSet (FLG_MODUNCONNOMODS) | |
10427 | && !(context_inIterDef () || context_inIterEnd ())) | |
10428 | { | |
10429 | voptgenerror | |
10430 | (FLG_MODUNCONNOMODS, | |
10431 | message ("Undetected modification possible " | |
10432 | "from call to unconstrained function %s: %s", | |
10433 | fname, | |
10434 | exprNode_unparse (fcn)), | |
10435 | exprNode_loc (fcn)); | |
10436 | } | |
10437 | } | |
10438 | ||
10439 | exprNode_checkSetAny (fcn, fname); | |
10440 | } | |
10441 | } | |
10442 | ||
10443 | void exprNode_checkUseParam (exprNode current) | |
10444 | { | |
10445 | if (exprNode_isDefined (current)) | |
10446 | { | |
10447 | exprNode_checkUse (current, current->sref, current->loc); | |
10448 | } | |
10449 | } | |
10450 | ||
10451 | static ctype | |
10452 | checkNumerics (ctype tr1, ctype tr2, ctype te1, ctype te2, | |
10453 | /*@notnull@*/ exprNode e1, /*@notnull@*/ exprNode e2, | |
10454 | lltok op) | |
10455 | { | |
10456 | ctype ret = tr1; | |
10457 | ||
10458 | if (!ctype_match (tr1, tr2)) | |
10459 | { | |
10460 | if ((ctype_isRealInt (tr1) || ctype_isReal (tr1)) && | |
10461 | (ctype_isRealInt (tr2) || ctype_isReal (tr2))) | |
10462 | { | |
10463 | DPRINTF (("No error: [%s] %s / [%s] %s", | |
10464 | exprNode_unparse (e1), ctype_unparse (tr1), | |
10465 | exprNode_unparse (e2), ctype_unparse (tr2))); | |
10466 | } | |
10467 | else | |
10468 | { | |
10469 | (void) gentypeerror | |
10470 | (tr1, e1, tr2, e2, | |
10471 | message ("Incompatible types for %s (%s, %s): %s %s %s", | |
10472 | lltok_unparse (op), | |
10473 | ctype_unparse (te1), | |
10474 | ctype_unparse (te2), | |
10475 | exprNode_unparse (e1), lltok_unparse (op), | |
10476 | exprNode_unparse (e2)), | |
10477 | e1->loc); | |
10478 | } | |
10479 | ret = ctype_unknown; | |
10480 | } | |
10481 | else | |
10482 | { | |
10483 | if (ctype_isForceRealNumeric (&tr1) && ctype_isForceRealNumeric (&tr2)) | |
10484 | { | |
10485 | ret = ctype_resolveNumerics (tr1, tr2); | |
10486 | } | |
10487 | else if (!context_msgStrictOps ()) | |
10488 | { | |
10489 | if (ctype_isPointer (tr1)) | |
10490 | { | |
10491 | if (ctype_isPointer (tr2) && !exprNode_isNullValue (e2)) | |
10492 | { | |
10493 | ret = ctype_int; | |
10494 | } | |
10495 | else if (ctype_isInt (tr2)) | |
10496 | { | |
10497 | ret = te1; | |
10498 | } | |
10499 | else | |
10500 | { | |
10501 | ret = ctype_unknown; | |
10502 | } | |
10503 | } | |
10504 | else if (ctype_isPointer (tr2)) | |
10505 | { | |
10506 | if (ctype_isPointer (tr1)) | |
10507 | { | |
10508 | ret = ctype_int; | |
10509 | } | |
10510 | else if (ctype_isInt (tr1)) | |
10511 | { | |
10512 | ret = te2; | |
10513 | } | |
10514 | else | |
10515 | { | |
10516 | ret = ctype_unknown; | |
10517 | } | |
10518 | } | |
10519 | else | |
10520 | { | |
10521 | ret = ctype_resolveNumerics (tr1, tr2); | |
10522 | } | |
10523 | } | |
10524 | else | |
10525 | { | |
10526 | int opid = lltok_getTok (op); | |
10527 | bool comparop = (opid == EQ_OP || opid == NE_OP | |
10528 | || opid == TLT || opid == TGT | |
10529 | || opid == LE_OP || opid == GE_OP); | |
10530 | ||
10531 | if (!ctype_isNumeric (tr1) && !ctype_isNumeric (tr2)) | |
10532 | { | |
10533 | if (comparop | |
10534 | && ((ctype_isEnum (tr1) && ctype_isEnum (tr2)) | |
10535 | || (ctype_isBool (tr1) && ctype_isBool (tr2)) | |
10536 | || (ctype_isChar (tr1) && ctype_isChar (tr2)))) | |
10537 | { | |
10538 | ; /* no error */ | |
10539 | } | |
10540 | else | |
10541 | { | |
10542 | if (ctype_sameName (te1, te2)) | |
10543 | { | |
10544 | voptgenerror | |
10545 | (FLG_STRICTOPS, | |
10546 | message ("Operands of %s are non-numeric (%t): %s %s %s", | |
10547 | lltok_unparse (op), te1, | |
10548 | exprNode_unparse (e1), lltok_unparse (op), | |
10549 | exprNode_unparse (e2)), | |
10550 | e1->loc); | |
10551 | } | |
10552 | else | |
10553 | { | |
10554 | voptgenerror | |
10555 | (FLG_STRICTOPS, | |
10556 | message ("Operands of %s are non-numerics (%t, %t): %s %s %s", | |
10557 | lltok_unparse (op), te1, te2, | |
10558 | exprNode_unparse (e1), lltok_unparse (op), | |
10559 | exprNode_unparse (e2)), | |
10560 | e1->loc); | |
10561 | } | |
10562 | } | |
10563 | } | |
10564 | else if (!ctype_isNumeric (tr1)) | |
10565 | { | |
10566 | voptgenerror | |
10567 | (FLG_STRICTOPS, | |
10568 | message ("Right operand of %s is non-numeric (%t): %s %s %s", | |
10569 | lltok_unparse (op), te1, | |
10570 | exprNode_unparse (e1), lltok_unparse (op), | |
10571 | exprNode_unparse (e2)), | |
10572 | e1->loc); | |
10573 | } | |
10574 | else | |
10575 | { | |
10576 | if (!ctype_isNumeric (tr2)) | |
10577 | { | |
10578 | voptgenerror | |
10579 | (FLG_STRICTOPS, | |
10580 | message ("Left operand of %s is non-numeric (%t): %s %s %s", | |
10581 | lltok_unparse (op), te2, | |
10582 | exprNode_unparse (e1), lltok_unparse (op), | |
10583 | exprNode_unparse (e2)), | |
10584 | e2->loc); | |
10585 | } | |
10586 | } | |
10587 | ||
10588 | ret = ctype_unknown; | |
10589 | } | |
10590 | } | |
10591 | ||
10592 | return ret; | |
10593 | } | |
10594 | ||
10595 | static void | |
10596 | abstractOpError (ctype tr1, ctype tr2, lltok op, | |
10597 | /*@notnull@*/ exprNode e1, /*@notnull@*/ exprNode e2, | |
10598 | fileloc loc1, fileloc loc2) | |
10599 | { | |
10600 | if (ctype_isRealAbstract (tr1) && ctype_isRealAbstract (tr2)) | |
10601 | { | |
10602 | if (ctype_match (tr1, tr2)) | |
10603 | { | |
10604 | voptgenerror | |
10605 | (FLG_ABSTRACT, | |
10606 | message ("Operands of %s are abstract type (%t): %s %s %s", | |
10607 | lltok_unparse (op), tr1, | |
10608 | exprNode_unparse (e1), lltok_unparse (op), exprNode_unparse (e2)), | |
10609 | loc1); | |
10610 | } | |
10611 | else | |
10612 | { | |
10613 | voptgenerror | |
10614 | (FLG_ABSTRACT, | |
10615 | message ("Operands of %s are abstract types (%t, %t): %s %s %s", | |
10616 | lltok_unparse (op), tr1, tr2, | |
10617 | exprNode_unparse (e1), lltok_unparse (op), exprNode_unparse (e2)), | |
10618 | loc1); | |
10619 | } | |
10620 | } | |
10621 | else if (ctype_isRealAbstract (tr1)) | |
10622 | { | |
10623 | voptgenerror | |
10624 | (FLG_ABSTRACT, | |
10625 | message ("Left operand of %s is abstract type (%t): %s %s %s", | |
10626 | lltok_unparse (op), tr1, | |
10627 | exprNode_unparse (e1), lltok_unparse (op), exprNode_unparse (e2)), | |
10628 | loc1); | |
10629 | } | |
10630 | else | |
10631 | { | |
10632 | if (ctype_isRealAbstract (tr2)) | |
10633 | { | |
10634 | voptgenerror | |
10635 | (FLG_ABSTRACT, | |
10636 | message ("Right operand of %s is abstract type (%t): %s %s %s", | |
10637 | lltok_unparse (op), tr2, | |
10638 | exprNode_unparse (e1), lltok_unparse (op), exprNode_unparse (e2)), | |
10639 | loc2); | |
10640 | } | |
10641 | } | |
10642 | } | |
10643 | ||
10644 | /* | |
10645 | ** e1 <= e2 | |
10646 | ** | |
10647 | ** requies e1 and e2 and not error exprNode's. | |
10648 | ** | |
10649 | ** Checks: | |
10650 | ** | |
10651 | ** If e1 is a component of an abstract type, and e2 is mutable and client-visible, | |
10652 | ** the rep of the abstract type is exposed. | |
10653 | ** | |
10654 | ** The order is very important: | |
10655 | ** | |
10656 | ** check rep expose (move into check transfer) | |
10657 | ** check transfer | |
10658 | ** setup aliases | |
10659 | */ | |
10660 | ||
10661 | /* | |
10662 | ** This isn't really a sensible procedure, but the indententation | |
10663 | ** was getting too deep. | |
10664 | */ | |
10665 | ||
10666 | static void | |
10667 | checkOneRepExpose (sRef ysr, sRef base, | |
10668 | /*@notnull@*/ exprNode e1, | |
10669 | /*@notnull@*/ exprNode e2, ctype ct, | |
10670 | sRef s2b) | |
10671 | { | |
10672 | if (!(sRef_isOnly (ysr) || sRef_isKeep (ysr) | |
10673 | || sRef_isOwned (ysr) | |
10674 | || sRef_isExposed (ysr))) | |
10675 | { | |
10676 | if (sRef_isAnyParam (base) && !sRef_isExposed (base) | |
10677 | && !sRef_isObserver (base)) /* evans 2001-07-11: added isObserver */ | |
10678 | ||
10679 | { | |
10680 | if (sRef_isIReference (ysr)) | |
10681 | { | |
10682 | if (sRef_sameName (base, sRef_getRootBase (e2->sref))) | |
10683 | { | |
10684 | voptgenerror | |
10685 | (FLG_ASSIGNEXPOSE, | |
10686 | message | |
10687 | ("Assignment of mutable component of parameter %q " | |
10688 | "to component of abstract " | |
10689 | "type %s exposes rep: %s = %s", | |
10690 | sRef_unparse (base), | |
10691 | ctype_unparse (ct), | |
10692 | exprNode_unparse (e1), exprNode_unparse (e2)), | |
10693 | e1->loc); | |
10694 | } | |
10695 | else | |
10696 | { | |
10697 | voptgenerror | |
10698 | (FLG_ASSIGNEXPOSE, | |
10699 | message | |
10700 | ("Assignment of mutable component of parameter %q " | |
10701 | "(through alias %q) to component of abstract " | |
10702 | "type %s exposes rep: %s = %s", | |
10703 | sRef_unparse (base), | |
10704 | sRef_unparse (e2->sref), | |
10705 | ctype_unparse (ct), | |
10706 | exprNode_unparse (e1), exprNode_unparse (e2)), | |
10707 | e1->loc); | |
10708 | } | |
10709 | } | |
10710 | else | |
10711 | { | |
10712 | if (sRef_sameName (base, sRef_getRootBase (e2->sref))) | |
10713 | { | |
10714 | voptgenerror | |
10715 | (FLG_ASSIGNEXPOSE, | |
10716 | message ("Assignment of mutable parameter %q " | |
10717 | "to component of abstract type %s " | |
10718 | "exposes rep: %s = %s", | |
10719 | sRef_unparse (base), | |
10720 | ctype_unparse (ct), | |
10721 | exprNode_unparse (e1), | |
10722 | exprNode_unparse (e2)), | |
10723 | e1->loc); | |
10724 | } | |
10725 | else | |
10726 | { | |
10727 | voptgenerror | |
10728 | (FLG_ASSIGNEXPOSE, | |
10729 | message ("Assignment of mutable parameter %q " | |
10730 | "(through alias %q) to " | |
10731 | "component of abstract type %s exposes " | |
10732 | "rep: %s = %s", | |
10733 | sRef_unparse (base), | |
10734 | sRef_unparse (e2->sref), | |
10735 | ctype_unparse (ct), | |
10736 | exprNode_unparse (e1), | |
10737 | exprNode_unparse (e2)), | |
10738 | e1->loc); | |
10739 | } | |
10740 | } | |
10741 | } | |
10742 | ||
10743 | if (sRef_isFileOrGlobalScope (s2b)) | |
10744 | { | |
10745 | if (sRef_sameName (base, sRef_getRootBase (e2->sref))) | |
10746 | { | |
10747 | voptgenerror | |
10748 | (FLG_REPEXPOSE, | |
10749 | message ("Assignment of global %q " | |
10750 | "to component of " | |
10751 | "abstract type %s exposes rep: %s = %s", | |
10752 | sRef_unparse (base), | |
10753 | ctype_unparse (ct), | |
10754 | exprNode_unparse (e1), exprNode_unparse (e2)), | |
10755 | e1->loc); | |
10756 | } | |
10757 | else | |
10758 | { | |
10759 | voptgenerror | |
10760 | (FLG_REPEXPOSE, | |
10761 | message ("Assignment of global %q (through alias %q) " | |
10762 | "to component of " | |
10763 | "abstract type %s exposes rep: %s = %s", | |
10764 | sRef_unparse (base), | |
10765 | sRef_unparse (e2->sref), | |
10766 | ctype_unparse (ct), | |
10767 | exprNode_unparse (e1), exprNode_unparse (e2)), | |
10768 | e1->loc); | |
10769 | } | |
10770 | } | |
10771 | } | |
10772 | } | |
10773 | ||
10774 | static void | |
10775 | doAssign (/*@notnull@*/ exprNode e1, /*@notnull@*/ exprNode e2, bool isInit) | |
10776 | { | |
10777 | DPRINTF (("Do assign: %s <- %s", | |
10778 | exprNode_unparse (e1), exprNode_unparse (e2))); | |
10779 | DPRINTF (("Ctype: %s", ctype_unparse (exprNode_getType (e1)))); | |
10780 | ||
10781 | if (ctype_isRealFunction (exprNode_getType (e1)) | |
10782 | && !ctype_isRealPointer (exprNode_getType (e1))) | |
10783 | { | |
10784 | voptgenerror | |
10785 | (FLG_TYPE, | |
10786 | message ("Invalid left-hand side of assignment (function type %s): %s", | |
10787 | ctype_unparse (exprNode_getType (e1)), | |
10788 | exprNode_unparse (e1)), | |
10789 | e1->loc); | |
10790 | } | |
10791 | ||
10792 | if (context_getFlag (FLG_ASSIGNEXPOSE) && ctype_isMutable (e2->typ)) | |
10793 | { | |
10794 | ctype t2 = exprNode_getType (e2); | |
10795 | sRef sr = sRef_getRootBase (e1->sref); | |
10796 | ctype ct = sRef_getType (sr); | |
10797 | ||
10798 | if (ctype_isAbstract (t2) | |
10799 | && !(uentry_isMutableDatatype (usymtab_getTypeEntry (ctype_typeId (t2))))) | |
10800 | { | |
10801 | /* it is immutable, okay to reference */ | |
10802 | goto donerepexpose; | |
10803 | } | |
10804 | ||
10805 | if (ctype_isAbstract (ct) && sRef_isIReference (e1->sref)) | |
10806 | { | |
10807 | sRef s2b = sRef_getRootBase (e2->sref); | |
10808 | sRef s1 = e1->sref; | |
10809 | sRef s1b = sRef_getRootBase (s1); | |
10810 | sRefSet aliases; | |
10811 | ||
10812 | aliases = usymtab_canAlias (e2->sref); | |
10813 | ||
10814 | if (!sRef_similar (s2b, s1b) | |
10815 | && !sRef_isExposed (s1) | |
10816 | && !(sRef_isOnly (s2b) || sRef_isKeep (s2b) || sRef_isExposed (s2b))) | |
10817 | { | |
10818 | if (sRef_isAnyParam (s2b) && !sRef_isOnly (s2b) | |
10819 | && !sRef_isOwned (s2b) && !sRef_isKeep (s2b) | |
10820 | && !sRef_isExposed (s2b)) | |
10821 | { | |
10822 | if (sRef_isIReference (e2->sref)) | |
10823 | { | |
10824 | voptgenerror | |
10825 | (FLG_ASSIGNEXPOSE, | |
10826 | message | |
10827 | ("Assignment of mutable component of parameter %q " | |
10828 | "to component of abstract type %s exposes rep: %s = %s", | |
10829 | sRef_unparse (s2b), | |
10830 | ctype_unparse (ct), | |
10831 | exprNode_unparse (e1), exprNode_unparse (e2)), | |
10832 | e1->loc); | |
10833 | } | |
10834 | else | |
10835 | { | |
10836 | voptgenerror | |
10837 | (FLG_ASSIGNEXPOSE, | |
10838 | message ("Assignment of mutable parameter %q to " | |
10839 | "component of abstract type %s exposes rep: %s = %s", | |
10840 | sRef_unparse (s2b), | |
10841 | ctype_unparse (ct), | |
10842 | exprNode_unparse (e1), exprNode_unparse (e2)), | |
10843 | e1->loc); | |
10844 | } | |
10845 | } | |
10846 | ||
10847 | if (sRef_isFileOrGlobalScope (s2b)) | |
10848 | { | |
10849 | voptgenerror | |
10850 | (FLG_ASSIGNEXPOSE, | |
10851 | message ("Assignment of global %q to component of " | |
10852 | "abstract type %s exposes rep: %s = %s", | |
10853 | sRef_unparse (s2b), | |
10854 | ctype_unparse (ct), | |
10855 | exprNode_unparse (e1), exprNode_unparse (e2)), | |
10856 | e1->loc); | |
10857 | } | |
10858 | ||
10859 | sRefSet_realElements (aliases, ysr) | |
10860 | { | |
10861 | sRef base = sRef_getRootBase (ysr); | |
10862 | ||
10863 | if (sRef_similar (ysr, s2b) || sRef_similar (s1b, base) | |
10864 | || sRef_sameName (base, s1b)) | |
10865 | { | |
10866 | ; /* error already reported or same sref */ | |
10867 | } | |
10868 | else | |
10869 | { | |
10870 | checkOneRepExpose (ysr, base, e1, e2, ct, s2b); | |
10871 | } | |
10872 | } end_sRefSet_realElements; | |
10873 | } | |
10874 | sRefSet_free (aliases); | |
10875 | } | |
10876 | } | |
10877 | ||
10878 | donerepexpose: | |
10879 | ||
10880 | /* | |
10881 | ** function variables don't really work... | |
10882 | */ | |
10883 | ||
10884 | if (!ctype_isFunction (ctype_realType (e2->typ))) | |
10885 | { | |
10886 | if (isInit) | |
10887 | { | |
10888 | DPRINTF (("Check init: %s / %s", | |
10889 | exprNode_unparse (e1), exprNode_unparse (e2))); | |
10890 | transferChecks_initialization (e1, e2); | |
10891 | } | |
10892 | else | |
10893 | { | |
10894 | transferChecks_assign (e1, e2); | |
10895 | } | |
10896 | } | |
10897 | else | |
10898 | { | |
10899 | sRef fref = e2->sref; | |
10900 | ||
10901 | sRef_setDefState (e1->sref, sRef_getDefState (fref), e1->loc); | |
10902 | sRef_setNullState (e1->sref, sRef_getNullState (fref), e1->loc); | |
10903 | ||
10904 | /* Need to typecheck the annotation on the parameters */ | |
10905 | ||
10906 | if (ctype_isRealFunction (e1->typ)) { | |
10907 | uentryList e1p = ctype_argsFunction (ctype_realType (e1->typ)); | |
10908 | uentryList e2p = ctype_argsFunction (ctype_realType (e2->typ)); | |
10909 | ||
10910 | if (!uentryList_isMissingParams (e1p) | |
10911 | && !uentryList_isMissingParams (e2p) | |
10912 | && uentryList_size (e1p) > 0) { | |
10913 | if (uentryList_size (e1p) == uentryList_size (e2p)) { | |
10914 | int n = 0; | |
10915 | ||
10916 | uentryList_elements (e1p, el1) { | |
10917 | uentry el2; | |
10918 | ||
10919 | el2 = uentryList_getN (e2p, n); | |
10920 | n++; | |
10921 | uentry_checkMatchParam (el1, el2, n, e2); | |
10922 | } end_uentryList_elements; | |
10923 | } | |
10924 | } | |
10925 | } | |
10926 | } | |
10927 | ||
10928 | if (exprNode_isStringLiteral (e2)) | |
10929 | { | |
10930 | exprNode_checkStringLiteralLength (exprNode_getType (e1), e2); | |
10931 | } | |
10932 | ||
10933 | if (isInit && sRef_isFileOrGlobalScope (e1->sref)) | |
10934 | { | |
10935 | ; | |
10936 | } | |
10937 | else | |
10938 | { | |
10939 | DPRINTF (("Update aliases: %s / %s", exprNode_unparse (e1), exprNode_unparse (e2))); | |
10940 | updateAliases (e1, e2); | |
10941 | } | |
10942 | } | |
10943 | ||
10944 | static void | |
10945 | checkMacroParen (exprNode e) | |
10946 | { | |
10947 | if (exprNode_isError (e) || e->kind == XPR_CAST) | |
10948 | { | |
10949 | ; | |
10950 | } | |
10951 | else | |
10952 | { | |
10953 | if (sRef_isUnsafe (e->sref) && !exprNode_isInParens (e)) | |
10954 | { | |
10955 | voptgenerror | |
10956 | (FLG_MACROPARENS, | |
10957 | message ("Macro parameter used without parentheses: %s", | |
10958 | exprNode_unparse (e)), | |
10959 | e->loc); | |
10960 | } | |
10961 | } | |
10962 | } | |
10963 | ||
10964 | static void | |
10965 | reflectNullTest (/*@notnull@*/ exprNode e, bool isnull) | |
10966 | { | |
10967 | if (isnull) | |
10968 | { | |
10969 | e->guards = guardSet_addTrueGuard (e->guards, e->sref); | |
10970 | } | |
10971 | else | |
10972 | { | |
10973 | e->guards = guardSet_addFalseGuard (e->guards, e->sref); | |
10974 | } | |
10975 | } | |
10976 | ||
10977 | /* | |
10978 | ** e1 <= e2 | |
10979 | ** | |
10980 | ** if e2 is a parameter or global derived location which | |
10981 | ** can be modified (that is, e2 is a mutable abstract type, | |
10982 | ** or a derived pointer), then e1 can alias e2. | |
10983 | ** | |
10984 | ** e1 can alias everything which e2 can alias. | |
10985 | ** | |
10986 | ** Also, if e1 is guarded, remove from guard sets! | |
10987 | */ | |
10988 | ||
10989 | static void updateAliases (/*@notnull@*/ exprNode e1, /*@notnull@*/ exprNode e2) | |
10990 | { | |
10991 | if (!context_inProtectVars ()) | |
10992 | { | |
10993 | /* | |
10994 | ** depends on types of e1 and e2 | |
10995 | */ | |
10996 | ||
10997 | sRef s1 = e1->sref; | |
10998 | sRef s2 = e2->sref; | |
10999 | ctype t1 = exprNode_getType (e1); | |
11000 | ||
11001 | /* handle pointer sRefs, record fields, arrays, etc... */ | |
11002 | ||
11003 | if (!ctype_isRealSU (t1)) | |
11004 | { | |
11005 | DPRINTF (("Copying real! %s", ctype_unparse (t1))); | |
11006 | sRef_copyRealDerivedComplete (s1, s2); | |
11007 | } | |
11008 | else | |
11009 | { | |
11010 | /* | |
11011 | ** Fields should alias | |
11012 | */ | |
11013 | ||
11014 | DPRINTF (("Not COPYING!: %s", ctype_unparse (t1))); | |
11015 | } | |
11016 | ||
11017 | if (ctype_isMutable (t1) && sRef_isKnown (s1)) | |
11018 | { | |
11019 | usymtab_clearAlias (s1); | |
11020 | usymtab_addMustAlias (s1, s2); | |
11021 | DPRINTF (("Add must alias: %s / %s", sRef_unparse (s1), sRef_unparse (s2))); | |
11022 | } | |
11023 | else | |
11024 | { | |
11025 | DPRINTF (("Not mutable: %s", ctype_unparse (t1))); | |
11026 | } | |
11027 | ||
11028 | if (sRef_possiblyNull (s1) && usymtab_isGuarded (s1)) | |
11029 | { | |
11030 | usymtab_unguard (s1); | |
11031 | } | |
11032 | } | |
11033 | } | |
11034 | ||
11035 | exprNode exprNode_updateLocation (/*@returned@*/ exprNode e, /*@temp@*/ fileloc loc) | |
11036 | { | |
11037 | if (exprNode_isDefined (e)) | |
11038 | { | |
11039 | e->loc = fileloc_update (e->loc, loc); | |
11040 | } | |
11041 | else | |
11042 | { | |
11043 | e = exprNode_createLoc (ctype_unknown, fileloc_copy (loc)); | |
11044 | } | |
11045 | ||
11046 | return (e); | |
11047 | } | |
11048 | ||
11049 | static void checkUniqueParams (exprNode fcn, | |
11050 | /*@notnull@*/ exprNode current, | |
11051 | exprNodeList args, | |
11052 | int paramno, uentry ucurrent) | |
11053 | { | |
11054 | int iparamno = 0; | |
11055 | sRef thisref = exprNode_getSref (current); | |
11056 | ||
11057 | /* | |
11058 | ** Check if any argument could match this argument. | |
11059 | */ | |
11060 | ||
11061 | exprNodeList_elements (args, icurrent) | |
11062 | { | |
11063 | iparamno++; | |
11064 | ||
11065 | if (iparamno != paramno) | |
11066 | { | |
11067 | sRef sr = exprNode_getSref (icurrent); | |
11068 | ||
11069 | if (sRef_similarRelaxed (thisref, sr)) | |
11070 | { | |
11071 | if (!sRef_isConst (thisref) && !sRef_isConst (sr)) | |
11072 | { | |
11073 | voptgenerror | |
11074 | (FLG_ALIASUNIQUE, | |
11075 | message | |
11076 | ("Parameter %d (%s) to function %s is declared %s but " | |
11077 | "is aliased by parameter %d (%s)", | |
11078 | paramno, | |
11079 | exprNode_unparse (current), | |
11080 | exprNode_unparse (fcn), | |
11081 | alkind_unparse (uentry_getAliasKind (ucurrent)), | |
11082 | iparamno, exprNode_unparse (icurrent)), | |
11083 | current->loc); | |
11084 | } | |
11085 | } | |
11086 | else | |
11087 | { | |
11088 | sRefSet aliases = usymtab_canAlias (sr); | |
11089 | ||
11090 | sRefSet_allElements (aliases, asr) | |
11091 | { | |
11092 | if (ctype_isUnknown (sRef_getType (thisref))) | |
11093 | { | |
11094 | sRef_setType (thisref, uentry_getType (ucurrent)); | |
11095 | } | |
11096 | ||
11097 | if (sRef_similarRelaxed (thisref, asr)) | |
11098 | { | |
11099 | if (sRef_isExternal (asr)) | |
11100 | { | |
11101 | if (sRef_isLocalState (thisref)) | |
11102 | { | |
11103 | ; /* okay */ | |
11104 | } | |
11105 | else | |
11106 | { | |
11107 | sRef base = sRef_getRootBase (asr); | |
11108 | ||
11109 | if (!sRef_similar (sRef_getBase (asr), thisref)) | |
11110 | { | |
11111 | if (sRef_isUnique (base) || sRef_isOnly (base) | |
11112 | || sRef_isKept (base) | |
11113 | || (sRef_isAddress (asr) && sRef_isLocalVar (base)) | |
11114 | || (sRef_isAddress (thisref) | |
11115 | && sRef_isLocalVar (sRef_getRootBase (thisref)))) | |
11116 | { | |
11117 | ; /* okay, no error */ | |
11118 | } | |
11119 | else | |
11120 | { | |
11121 | voptgenerror | |
11122 | (FLG_MAYALIASUNIQUE, | |
11123 | message | |
11124 | ("Parameter %d (%s) to function %s is declared %s but " | |
11125 | "may be aliased externally by parameter %d (%s)", | |
11126 | paramno, | |
11127 | exprNode_unparse (current), | |
11128 | exprNode_unparse (fcn), | |
11129 | alkind_unparse (uentry_getAliasKind (ucurrent)), | |
11130 | iparamno, exprNode_unparse (icurrent)), | |
11131 | current->loc); | |
11132 | } | |
11133 | } | |
11134 | } | |
11135 | } | |
11136 | else | |
11137 | { | |
11138 | voptgenerror | |
11139 | (FLG_ALIASUNIQUE, | |
11140 | message | |
11141 | ("Parameter %d (%s) to function %s is declared %s but " | |
11142 | "is aliased externally by parameter %d (%s) through " | |
11143 | "alias %q", | |
11144 | paramno, | |
11145 | exprNode_unparse (current), | |
11146 | exprNode_unparse (fcn), | |
11147 | alkind_unparse (uentry_getAliasKind (ucurrent)), | |
11148 | iparamno, exprNode_unparse (icurrent), | |
11149 | sRef_unparse (asr)), | |
11150 | current->loc); | |
11151 | } | |
11152 | } | |
11153 | } end_sRefSet_allElements; | |
11154 | sRefSet_free (aliases); | |
11155 | } | |
11156 | } | |
11157 | } end_exprNodeList_elements; | |
11158 | } | |
11159 | ||
11160 | long exprNode_getLongValue (exprNode e) { | |
11161 | long value; | |
11162 | ||
11163 | if (exprNode_hasValue (e) | |
11164 | && multiVal_isInt (exprNode_getValue (e))) | |
11165 | { | |
11166 | value = multiVal_forceInt (exprNode_getValue (e)); | |
11167 | } | |
11168 | else | |
11169 | { | |
11170 | /*@!! BADBRANCH;*/ | |
11171 | value = 0; | |
11172 | } | |
11173 | ||
11174 | return value; | |
11175 | } | |
11176 | ||
11177 | /*@observer@*/ fileloc exprNode_getfileloc (exprNode p_e) | |
11178 | { | |
11179 | if (exprNode_isDefined (p_e) ) | |
11180 | return ( p_e->loc ); | |
11181 | else | |
11182 | return fileloc_undefined; | |
11183 | } | |
11184 | ||
11185 | /*@only@*/ fileloc exprNode_getNextSequencePoint (exprNode e) | |
11186 | { | |
11187 | /* | |
11188 | ** Returns the location of the sequence point following e. | |
11189 | ** | |
11190 | ** Only works for statements (for now). | |
11191 | */ | |
11192 | ||
11193 | if (exprNode_isDefined (e) && e->kind == XPR_STMT) { | |
11194 | lltok t = exprData_getUopTok (e->edata); | |
11195 | return fileloc_copy(lltok_getLoc (t)); | |
11196 | } else { | |
11197 | /* drl possible problem : warning fix | |
11198 | llcontbug (message ("Cannot get next sequence point: %s", exprNode_unparse (e))); | |
11199 | */ | |
11200 | return fileloc_undefined; | |
11201 | } | |
11202 | } | |
11203 | ||
11204 | exprNode exprNode_createNew(ctype c) | |
11205 | { | |
11206 | exprNode ret; | |
11207 | ||
11208 | ret = exprNode_createPlain (c); | |
11209 | ||
11210 | return ret; | |
11211 | } | |
11212 | ||
11213 | bool exprNode_isInitBlock (exprNode e) | |
11214 | { | |
11215 | return (exprNode_isDefined(e) && e->kind == XPR_INITBLOCK); | |
11216 | } |