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616915dd | 1 | /* |
2 | ** LCLint - annotation-assisted static program checker | |
3 | ** Copyright (C) 1994-2000 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 lclint: lclint-request@cs.virginia.edu | |
21 | ** To report a bug: lclint-bug@cs.virginia.edu | |
22 | ** For more information: http://lclint.cs.virginia.edu | |
23 | */ | |
24 | /* | |
25 | ** exprNode.c | |
26 | */ | |
27 | ||
28 | # include <ctype.h> /* for isdigit */ | |
29 | # include "lclintMacros.nf" | |
30 | # include "basic.h" | |
31 | # include "cgrammar.h" | |
32 | # include "cgrammar_tokens.h" | |
33 | ||
34 | # include "exprChecks.h" | |
35 | # include "aliasChecks.h" | |
36 | # include "exprNodeSList.h" | |
37 | # include "exprData.i" | |
38 | ||
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, sRef p_s); | |
45 | static bool exprNode_matchArgType (ctype p_ct, exprNode p_e); | |
84c9ffbf | 46 | |
616915dd | 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, 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, 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 | ||
8ac07c2e | 109 | # define exprNode_defineConstraints(e) { \ |
84c9ffbf | 110 | (e)->requiresConstraints = constraintList_makeNew(); \ |
111 | (e)->ensuresConstraints = constraintList_makeNew(); \ | |
112 | (e)->trueEnsuresConstraints = constraintList_makeNew(); \ | |
113 | (e)->falseEnsuresConstraints = constraintList_makeNew(); } | |
114 | ||
616915dd | 115 | /* |
116 | ** must occur after library has been read | |
117 | */ | |
118 | ||
119 | void exprNode_initMod (void) | |
120 | /*@globals undef regArg, undef outArg, undef outStringArg, | |
121 | undef csOnlyArg, undef csArg; | |
122 | @*/ | |
123 | { | |
124 | uentry ue; | |
125 | idDecl tmp; | |
126 | ||
127 | initMod = TRUE; | |
128 | cstringType = ctype_unknown; | |
129 | ctypeType = ctype_unknown; | |
130 | filelocType = ctype_unknown; | |
131 | ||
132 | defref = sRef_undefined; | |
133 | ||
134 | if (usymtab_existsType (cstring_makeLiteralTemp ("cstring"))) | |
135 | { | |
136 | cstringType = usymtab_lookupAbstractType (cstring_makeLiteralTemp ("cstring")); | |
137 | } | |
138 | ||
139 | if (usymtab_existsType (cstring_makeLiteralTemp ("ctype"))) | |
140 | { | |
141 | ctypeType = usymtab_lookupAbstractType (cstring_makeLiteralTemp ("ctype")); | |
142 | } | |
143 | ||
144 | if (usymtab_existsType (cstring_makeLiteralTemp ("fileloc"))) | |
145 | { | |
146 | filelocType = usymtab_lookupAbstractType (cstring_makeLiteralTemp ("fileloc")); | |
147 | } | |
148 | ||
149 | if (usymtab_existsGlob (cstring_makeLiteralTemp ("stdin"))) | |
150 | { | |
151 | ue = usymtab_lookupGlob (cstring_makeLiteralTemp ("stdin")); | |
152 | } | |
153 | else /* define stdin */ | |
154 | { | |
155 | ue = uentry_makeVariable (cstring_makeLiteralTemp ("stdin"), | |
156 | ctype_unknown, | |
157 | fileloc_getBuiltin (), | |
158 | FALSE); | |
159 | uentry_setHasNameError (ue); | |
160 | ue = usymtab_supGlobalEntryReturn (ue); | |
161 | } | |
162 | ||
163 | stdinRef = sRef_makePointer (uentry_getSref (ue)); | |
164 | ||
165 | if (usymtab_existsGlob (cstring_makeLiteralTemp ("stdout"))) | |
166 | { | |
167 | ue = usymtab_lookupGlob (cstring_makeLiteralTemp ("stdout")); | |
168 | } | |
169 | else | |
170 | { | |
171 | ue = uentry_makeVariable (cstring_makeLiteralTemp ("stdout"), | |
172 | ctype_unknown, | |
173 | fileloc_getBuiltin (), | |
174 | FALSE); | |
175 | uentry_setHasNameError (ue); | |
176 | ue = usymtab_supGlobalEntryReturn (ue); | |
177 | } | |
178 | ||
179 | stdoutRef = sRef_makePointer (uentry_getSref (ue)); | |
180 | ||
181 | tmp = idDecl_create (cstring_undefined, qtype_create (ctype_unknown)); | |
182 | ||
183 | regArg = uentry_makeParam (tmp, PARAMUNKNOWN); | |
184 | ||
185 | idDecl_setTyp (tmp, | |
186 | qtype_addQual (qtype_create (ctype_makePointer (ctype_unknown)), | |
187 | qual_createOut ())); | |
188 | ||
189 | outArg = uentry_makeParam (tmp, PARAMUNKNOWN); | |
190 | ||
191 | idDecl_setTyp (tmp, qtype_addQual (qtype_create (ctype_string), | |
192 | qual_createOut ())); | |
193 | ||
194 | outStringArg = uentry_makeParam (tmp, PARAMUNKNOWN); | |
195 | ||
196 | idDecl_setTyp (tmp, qtype_addQual (qtype_addQual (qtype_create (cstringType), | |
197 | qual_createOnly ()), | |
198 | qual_createNull ())); | |
199 | ||
200 | csOnlyArg = uentry_makeParam (tmp, PARAMUNKNOWN); | |
201 | ||
202 | idDecl_setTyp (tmp, qtype_addQual (qtype_create (cstringType), qual_createNull ())); | |
203 | csArg = uentry_makeParam (tmp, PARAMUNKNOWN); | |
204 | ||
205 | idDecl_free (tmp); | |
206 | } | |
207 | ||
208 | void | |
209 | exprNode_destroyMod (void) | |
210 | /*@globals killed regArg, killed outArg, killed outStringArg, | |
211 | killed mustExitNode, initMod @*/ | |
212 | { | |
213 | if (initMod) | |
214 | { | |
215 | uentry_free (regArg); | |
216 | uentry_free (outArg); | |
217 | uentry_free (outStringArg); | |
218 | ||
219 | exprNode_free (mustExitNode); | |
220 | initMod = FALSE; | |
221 | /*@-branchstate@*/ | |
222 | } | |
223 | /*@=branchstate@*/ | |
224 | } | |
225 | ||
226 | static void exprNode_resetSref (/*@notnull@*/ exprNode e) | |
227 | { | |
228 | e->sref = defref; | |
229 | } | |
230 | ||
616915dd | 231 | static bool isFlagKey (char key) |
232 | { | |
233 | return (key == '-' || key == '+' || key == ' ' || key == '#'); | |
234 | } | |
235 | ||
236 | static void exprNode_combineControl (/*@notnull@*/ exprNode ret, | |
237 | /*@notnull@*/ exprNode ifclause, | |
238 | /*@notnull@*/ exprNode elseclause) | |
239 | { | |
240 | ret->canBreak = ifclause->canBreak || elseclause->canBreak; | |
241 | ||
242 | ret->mustBreak = | |
243 | (ifclause->mustBreak || exprNode_mustEscape (ifclause)) | |
244 | && (elseclause->mustBreak || exprNode_mustEscape (elseclause)); | |
245 | ||
246 | ret->exitCode = exitkind_combine (ifclause->exitCode, | |
247 | elseclause->exitCode); | |
248 | ||
249 | } | |
250 | ||
251 | /* | |
252 | ** For exprNode's returned by exprNode_effect. | |
253 | */ | |
254 | ||
255 | static bool shallowKind (exprKind kind) | |
256 | { | |
257 | return (kind == XPR_STRINGLITERAL | |
258 | || kind == XPR_NUMLIT | |
259 | || kind == XPR_EMPTY | |
260 | || kind == XPR_BODY | |
261 | || kind == XPR_NODE); | |
262 | } | |
263 | ||
264 | static void | |
265 | exprNode_freeIniter (/*@only@*/ exprNode e) | |
266 | { | |
267 | if (!exprNode_isError (e)) | |
268 | { | |
269 | switch (e->kind) | |
270 | { | |
271 | case XPR_FACCESS: | |
272 | sfree (e->edata->field); | |
273 | sfree (e->edata); | |
274 | break; | |
275 | case XPR_FETCH: | |
276 | exprNode_free (e->edata->op->b); | |
277 | /*@-compdestroy@*/ sfree (e->edata->op); /*@=compdestroy@*/ | |
278 | sfree (e->edata); | |
279 | break; | |
280 | default: | |
281 | llbug (message ("other: %s", exprNode_unparse (e))); | |
282 | } | |
283 | ||
284 | multiVal_free (e->val); | |
285 | cstring_free (e->etext); | |
286 | fileloc_free (e->loc); | |
287 | sRefSet_free (e->uses); | |
288 | sRefSet_free (e->sets); | |
289 | sRefSet_free (e->msets); | |
290 | guardSet_free (e->guards); | |
291 | sfree (e); | |
292 | } | |
293 | } | |
294 | ||
295 | void | |
296 | exprNode_freeShallow (/*@only@*/ exprNode e) | |
297 | { | |
298 | if (!exprNode_isError (e)) | |
299 | { | |
300 | if (shallowKind (e->kind)) | |
301 | { | |
302 | } | |
303 | else | |
304 | { | |
305 | if (!inEffect) | |
306 | { | |
307 | if (e->kind == XPR_EMPTY | |
308 | || e->kind == XPR_BODY | |
309 | || e->kind == XPR_STRINGLITERAL | |
310 | || e->kind == XPR_NUMLIT | |
311 | || e->kind == XPR_NODE | |
312 | || e->kind == XPR_OFFSETOF | |
313 | || e->kind == XPR_ALIGNOFT | |
314 | || e->kind == XPR_ALIGNOF | |
315 | || e->kind == XPR_SIZEOFT | |
316 | || e->kind == XPR_SIZEOF) | |
317 | { | |
318 | /* don't free anything */ | |
319 | } | |
320 | else | |
321 | { | |
322 | /* multiVal_free (e->val); */ | |
323 | cstring_free (e->etext); | |
324 | fileloc_free (e->loc); | |
325 | sRefSet_free (e->uses); | |
326 | sRefSet_free (e->sets); | |
327 | sRefSet_free (e->msets); | |
328 | guardSet_free (e->guards); | |
329 | exprData_freeShallow (e->edata, e->kind); | |
330 | nowalloc--; | |
331 | /*@-compdestroy@*/ sfree (e); /*@=compdestroy@*/ | |
332 | /*@-branchstate@*/ | |
333 | } | |
334 | } | |
335 | } /*@=branchstate@*/ | |
336 | } | |
337 | } | |
338 | ||
339 | void | |
340 | exprNode_free (exprNode e) | |
341 | { | |
342 | if (!exprNode_isError (e)) | |
343 | { | |
344 | if (!inEffect) | |
345 | { | |
346 | multiVal_free (e->val); | |
347 | cstring_free (e->etext); | |
348 | fileloc_free (e->loc); | |
349 | sRefSet_free (e->uses); | |
350 | sRefSet_free (e->sets); | |
351 | sRefSet_free (e->msets); | |
352 | guardSet_free (e->guards); | |
353 | exprData_free (e->edata, e->kind); | |
354 | ||
355 | nowalloc--; | |
356 | sfree (e); | |
357 | /*@-branchstate@*/ | |
358 | } /*@=branchstate@*/ | |
359 | } | |
360 | } | |
361 | ||
362 | exprNode | |
363 | exprNode_makeError () | |
364 | { | |
365 | return exprNode_undefined; | |
366 | } | |
367 | ||
368 | static /*@out@*/ /*@only@*/ /*@notnull@*/ exprNode | |
369 | exprNode_new (void) | |
370 | { | |
371 | exprNode ret = (exprNode) dmalloc (sizeof (*ret)); | |
372 | /* static int lastexpnodes = 0; */ | |
373 | ||
374 | nowalloc++; | |
375 | totalloc++; | |
376 | ||
377 | if (nowalloc > maxalloc) | |
378 | { | |
379 | maxalloc = nowalloc; | |
380 | } | |
381 | ||
382 | return ret; | |
383 | } | |
384 | ||
385 | static /*@notnull@*/ /*@special@*/ exprNode | |
386 | exprNode_createPlain (ctype c) | |
387 | /*@defines result@*/ | |
388 | /*@post:isnull result->edata, result->loc, result->val, result->guards, | |
389 | result->uses, result->sets, result->msets, result->etext @*/ | |
390 | /*@*/ | |
391 | { | |
392 | exprNode e = exprNode_new (); | |
393 | ||
394 | e->typ = c; | |
395 | e->kind = XPR_EMPTY; | |
396 | e->val = multiVal_undefined; | |
397 | e->sref = defref; | |
398 | e->etext = cstring_undefined; | |
399 | e->loc = fileloc_undefined; | |
400 | e->guards = guardSet_undefined; | |
401 | e->uses = sRefSet_undefined; | |
402 | e->sets = sRefSet_undefined; | |
403 | e->msets = sRefSet_undefined; | |
404 | e->edata = exprData_undefined; | |
405 | e->exitCode = XK_NEVERESCAPE; | |
406 | e->canBreak = FALSE; | |
407 | e->mustBreak = FALSE; | |
408 | e->isJumpPoint = FALSE; | |
8ac07c2e | 409 | |
410 | exprNode_defineConstraints(e); | |
411 | ||
616915dd | 412 | return (e); |
413 | } | |
414 | ||
415 | /*@observer@*/ exprNode exprNode_makeMustExit (void) | |
416 | { | |
417 | if (exprNode_isUndefined (mustExitNode)) | |
418 | { | |
419 | mustExitNode = exprNode_createPlain (ctype_unknown); | |
420 | mustExitNode->exitCode = XK_MUSTEXIT; | |
421 | } | |
422 | ||
423 | return mustExitNode; | |
424 | } | |
425 | ||
426 | ||
427 | static /*@notnull@*/ /*@special@*/ exprNode exprNode_create (ctype c) | |
428 | /*@defines result@*/ | |
429 | /*@post:isnull result->edata, result->guards, result->val, | |
430 | result->uses, result->sets, result->msets@*/ | |
431 | /*@*/ | |
432 | { | |
433 | exprNode e = exprNode_createPlain (c); | |
434 | e->loc = fileloc_copy (g_currentloc); | |
435 | return (e); | |
436 | } | |
437 | ||
438 | static /*@notnull@*/ /*@special@*/ exprNode exprNode_createUnknown (void) | |
439 | /*@defines result@*/ | |
440 | /*@post:isnull result->edata, result->guards, | |
441 | result->uses, result->sets, result->msets@*/ | |
442 | /*@*/ | |
443 | { | |
444 | return (exprNode_create (ctype_unknown)); | |
445 | } | |
446 | ||
447 | static /*@notnull@*/ /*@special@*/ exprNode | |
448 | exprNode_createLoc (ctype c, /*@keep@*/ fileloc loc) | |
449 | /*@defines result@*/ | |
450 | /*@post:isnull result->edata, result->guards, result->val, | |
451 | result->uses, result->sets, result->msets@*/ | |
452 | /*@*/ | |
453 | { | |
454 | exprNode e = exprNode_createPlain (c); | |
455 | e->loc = loc; | |
456 | return (e); | |
457 | } | |
458 | ||
459 | static void | |
460 | exprNode_copySets (/*@special@*/ /*@notnull@*/ exprNode ret, exprNode e) | |
461 | /*@defines ret->guards, ret->uses, ret->sets, ret->msets@*/ | |
462 | { | |
463 | if (exprNode_isDefined (e)) | |
464 | { | |
465 | ret->guards = guardSet_copy (e->guards); | |
466 | ret->uses = sRefSet_newCopy (e->uses); | |
467 | ret->sets = sRefSet_newCopy (e->sets); | |
468 | ret->msets = sRefSet_newCopy (e->msets); | |
469 | } | |
470 | else | |
471 | { | |
472 | ret->guards = guardSet_undefined; | |
473 | ret->uses = sRefSet_undefined; | |
474 | ret->sets = sRefSet_undefined; | |
475 | ret->msets = sRefSet_undefined; | |
476 | } | |
477 | } | |
478 | ||
479 | static /*@notnull@*/ /*@special@*/ exprNode | |
480 | exprNode_createPartialLocCopy (exprNode e, /*@only@*/ fileloc loc) | |
481 | /*@defines result@*/ | |
482 | /*@post:isnull result->edata, result->etext@*/ | |
483 | /*@*/ | |
484 | { | |
485 | exprNode ret = exprNode_new (); | |
486 | ||
487 | if (exprNode_isError (e)) | |
488 | { | |
489 | ret->typ = ctype_unknown; | |
490 | ret->val = multiVal_undefined; | |
491 | ret->loc = loc; | |
492 | ret->guards = guardSet_undefined; | |
493 | ret->uses = sRefSet_undefined; | |
494 | ret->sets = sRefSet_undefined; | |
495 | ret->msets = sRefSet_undefined; | |
496 | } | |
497 | else | |
498 | { | |
499 | ret->typ = e->typ; | |
500 | ret->val = multiVal_copy (e->val); | |
501 | ret->loc = loc; | |
502 | ret->guards = guardSet_copy (e->guards); | |
503 | ret->uses = sRefSet_newCopy (e->uses); | |
504 | ret->sets = sRefSet_newCopy (e->sets); | |
505 | ret->msets = sRefSet_newCopy (e->msets); | |
506 | } | |
507 | ||
508 | ret->kind = XPR_EMPTY; | |
509 | ret->sref = defref; | |
510 | ret->etext = cstring_undefined; | |
511 | ret->exitCode = XK_NEVERESCAPE; | |
512 | ret->canBreak = FALSE; | |
513 | ret->mustBreak = FALSE; | |
514 | ret->isJumpPoint = FALSE; | |
515 | ret->edata = exprData_undefined; | |
516 | ||
517 | return (ret); | |
518 | } | |
519 | ||
520 | ||
521 | static /*@notnull@*/ /*@special@*/ exprNode | |
522 | exprNode_createPartialCopy (exprNode e) | |
523 | /*@defines result@*/ | |
524 | /*@post:isnull result->edata, result->etext@*/ | |
525 | /*@*/ | |
526 | { | |
527 | return (exprNode_createPartialLocCopy (e, fileloc_copy (exprNode_loc (e)))); | |
528 | } | |
529 | ||
530 | static /*@notnull@*/ /*@special@*/ exprNode | |
531 | exprNode_createPartialNVCopy (exprNode e) | |
532 | /*@defines result@*/ | |
533 | /*@post:isnull result->edata, result->etext, result->val @*/ | |
534 | /*@*/ | |
535 | { | |
536 | exprNode ret = exprNode_new (); | |
537 | ||
538 | if (exprNode_isError (e)) | |
539 | { | |
540 | ret->typ = ctype_unknown; | |
541 | ret->loc = fileloc_undefined; | |
542 | ret->guards = guardSet_undefined; | |
543 | ret->uses = sRefSet_undefined; | |
544 | ret->sets = sRefSet_undefined; | |
545 | ret->msets = sRefSet_undefined; | |
546 | } | |
547 | else | |
548 | { | |
549 | ret->typ = e->typ; | |
550 | ret->loc = fileloc_copy (e->loc); | |
551 | ret->guards = guardSet_copy (e->guards); | |
552 | ret->uses = sRefSet_newCopy (e->uses); | |
553 | ret->sets = sRefSet_newCopy (e->sets); | |
554 | ret->msets = sRefSet_newCopy (e->msets); | |
555 | } | |
556 | ||
557 | ret->val = multiVal_undefined; | |
558 | ret->kind = XPR_EMPTY; | |
559 | ret->sref = defref; | |
560 | ret->etext = cstring_undefined; | |
561 | ret->exitCode = XK_NEVERESCAPE; | |
562 | ret->canBreak = FALSE; | |
563 | ret->mustBreak = FALSE; | |
564 | ret->isJumpPoint = FALSE; | |
565 | ret->edata = exprData_undefined; | |
566 | ||
567 | return (ret); | |
568 | } | |
569 | ||
570 | static /*@notnull@*/ /*@special@*/ exprNode | |
571 | exprNode_createSemiCopy (exprNode e) | |
572 | /*@defines result@*/ | |
573 | /*@post:isnull result->edata, result->etext, result->sets, | |
574 | result->msets, result->uses, result->guards@*/ | |
575 | /*@*/ | |
576 | { | |
577 | if (exprNode_isError (e)) | |
578 | { | |
579 | return exprNode_createPlain (ctype_unknown); | |
580 | } | |
581 | else | |
582 | { | |
583 | exprNode ret = exprNode_new (); | |
584 | ||
585 | ret->typ = e->typ; | |
586 | ret->val = multiVal_copy (e->val); | |
587 | ret->loc = fileloc_copy (e->loc); | |
588 | ret->guards = guardSet_undefined; | |
589 | ret->uses = sRefSet_undefined; | |
590 | ret->sets = sRefSet_undefined; | |
591 | ret->msets = sRefSet_undefined; | |
592 | ||
593 | ret->kind = XPR_EMPTY; | |
594 | ret->sref = defref; | |
595 | ret->etext = cstring_undefined; | |
596 | ret->exitCode = XK_NEVERESCAPE; | |
597 | ret->canBreak = FALSE; | |
598 | ret->mustBreak = FALSE; | |
599 | ret->isJumpPoint = FALSE; | |
600 | ret->edata = exprData_undefined; | |
601 | ||
602 | return (ret); | |
603 | } | |
604 | } | |
605 | ||
606 | bool | |
607 | exprNode_isNullValue (exprNode e) | |
608 | { | |
609 | if (exprNode_isDefined (e)) | |
610 | { | |
611 | multiVal m = exprNode_getValue (e); | |
612 | ||
613 | if (multiVal_isInt (m)) | |
614 | { | |
615 | return (multiVal_forceInt (m) == 0); | |
616 | } | |
617 | } | |
618 | ||
619 | return FALSE; | |
620 | } | |
621 | ||
622 | static bool | |
623 | exprNode_isUnknownConstant (/*@notnull@*/ exprNode e) | |
624 | { | |
625 | while (e->kind == XPR_PARENS) | |
626 | { | |
627 | e = exprData_getUopNode (e->edata); | |
628 | llassert (exprNode_isDefined (e)); | |
629 | } | |
630 | ||
631 | if (e->kind == XPR_CONST) | |
632 | { | |
633 | multiVal m = exprNode_getValue (e); | |
634 | ||
635 | if (multiVal_isUnknown (m)) | |
636 | { | |
637 | return TRUE; | |
638 | } | |
639 | } | |
640 | ||
641 | return FALSE; | |
642 | } | |
643 | ||
644 | /*@only@*/ exprNode | |
645 | exprNode_numLiteral (ctype c, /*@temp@*/ cstring t, | |
646 | /*@only@*/ fileloc loc, long val) | |
647 | { | |
648 | exprNode e = exprNode_createLoc (c, loc); | |
649 | ||
650 | e->kind = XPR_NUMLIT; | |
651 | ||
652 | llassert (multiVal_isUndefined (e->val)); | |
653 | e->val = multiVal_makeInt (val); | |
654 | e->edata = exprData_makeLiteral (cstring_copy (t)); | |
655 | ||
656 | if (val == 0) | |
657 | { | |
658 | e->sref = sRef_makeUnknown (); | |
659 | sRef_setDefNull (e->sref, e->loc); | |
660 | } | |
661 | ||
662 | DPRINTF (("Num lit: %s / %s", exprNode_unparse (e), ctype_unparse (exprNode_getType (e)))); | |
663 | return (e); | |
664 | } | |
665 | ||
666 | /*@only@*/ exprNode | |
667 | exprNode_charLiteral (char c, cstring text, /*@only@*/ fileloc loc) | |
668 | { | |
669 | exprNode e = exprNode_createLoc (ctype_char, loc); | |
670 | ||
671 | if (context_getFlag (FLG_CHARINTLITERAL)) | |
672 | { | |
673 | e->typ = ctype_makeConj (ctype_char, ctype_int); | |
674 | } | |
675 | ||
676 | e->kind = XPR_NUMLIT; | |
677 | e->val = multiVal_makeChar (c); | |
678 | ||
679 | e->edata = exprData_makeLiteral (cstring_copy (text)); | |
680 | return (e); | |
681 | } | |
682 | ||
683 | /*@only@*/ exprNode | |
684 | exprNode_floatLiteral (double d, ctype ct, cstring text, /*@only@*/ fileloc loc) | |
685 | { | |
686 | exprNode e = exprNode_createLoc (ct, loc); | |
687 | ||
688 | e->kind = XPR_NUMLIT; | |
689 | e->val = multiVal_makeDouble (d); | |
690 | e->edata = exprData_makeLiteral (cstring_copy (text)); | |
691 | return (e); | |
692 | } | |
693 | ||
694 | multiVal exprNode_getValue (exprNode e) | |
695 | { | |
696 | while (exprNode_isInParens (e)) { | |
697 | if (e->edata != NULL) { | |
698 | e = exprData_getUopNode (e->edata); | |
699 | } else { | |
700 | break; | |
701 | } | |
702 | } | |
703 | ||
704 | if (exprNode_isDefined (e)) { | |
705 | return e->val; | |
706 | } else { | |
707 | return multiVal_undefined; | |
708 | } | |
709 | } | |
710 | ||
711 | /*@only@*/ exprNode | |
712 | exprNode_stringLiteral (/*@only@*/ cstring t, /*@only@*/ fileloc loc) | |
713 | { | |
714 | exprNode e = exprNode_createLoc (ctype_string, loc); | |
715 | int len = cstring_length (t) - 2; | |
716 | char *ts = cstring_toCharsSafe (t); | |
717 | char *s = cstring_toCharsSafe (cstring_create (len + 1)); | |
718 | ||
719 | if (context_getFlag (FLG_STRINGLITERALLEN)) | |
720 | { | |
721 | if (len > context_getValue (FLG_STRINGLITERALLEN)) | |
722 | { | |
723 | voptgenerror (FLG_STRINGLITERALLEN, | |
724 | message | |
725 | ("String literal length (%d) exceeds maximum " | |
726 | "length (%d): %s", | |
727 | len, | |
728 | context_getValue (FLG_STRINGLITERALLEN), | |
729 | t), | |
730 | e->loc); | |
731 | } | |
732 | } | |
733 | ||
734 | strncpy (s, ts+1, size_fromInt (len)); | |
735 | *(s + len) = '\0'; | |
736 | ||
737 | ||
738 | e->kind = XPR_STRINGLITERAL; | |
739 | e->val = multiVal_makeString (cstring_fromCharsO (s)); | |
740 | e->edata = exprData_makeLiteral (t); | |
741 | e->sref = sRef_makeType (ctype_string); | |
742 | /* Start modifications */ | |
743 | /* This expr is null terminated, so we set the len and size */ | |
744 | sRef_setNullTerminatedState(e->sref); | |
745 | /* | |
470b7798 | 746 | DPRINTF("Len is set to : %d\n\n", strlen((char *)multiVal_forceString(e->val))); |
747 | DPRINTF("Size is set to : %d\n\n", strlen((char *)multiVal_forceString(e->val))); | |
748 | DPRINTF("State is set to: %d\n\n", e->sref->bufinfo.bufstate); | |
616915dd | 749 | */ |
84c9ffbf | 750 | sRef_setLen(e->sref, (int) strlen((char *)multiVal_forceString(e->val))); |
751 | sRef_setSize(e->sref, (int) strlen((char *)multiVal_forceString(e->val))); | |
616915dd | 752 | |
753 | if (context_getFlag (FLG_READONLYSTRINGS)) | |
754 | { | |
755 | sRef_setAliasKind (e->sref, AK_STATIC, fileloc_undefined); | |
756 | sRef_setExKind (e->sref, XO_OBSERVER, loc); | |
757 | } | |
758 | else | |
759 | { | |
760 | sRef_setAliasKind (e->sref, AK_ERROR, fileloc_undefined); | |
761 | } | |
762 | ||
763 | return (e); /* s released */ | |
764 | } | |
765 | ||
766 | exprNode exprNode_fromUIO (cstring c) | |
767 | { | |
768 | fileloc loc = context_getSaveLocation (); | |
769 | exprNode e = exprNode_createPlain (ctype_unknown); | |
770 | ||
771 | e->kind = XPR_VAR; | |
772 | ||
773 | if (fileloc_isUndefined (loc)) | |
774 | { | |
775 | loc = fileloc_copy (g_currentloc); | |
776 | } | |
777 | ||
778 | e->loc = loc; /* save loc was mangled */ | |
779 | e->sref = defref; | |
780 | ||
781 | if (usymtab_exists (c)) | |
782 | { | |
783 | uentry ue = usymtab_lookupEither (c); | |
784 | ||
785 | if (uentry_isDatatype (ue) | |
786 | && uentry_isSpecified (ue)) | |
787 | { | |
788 | llfatalerror | |
789 | (message ("%q: Specified datatype %s used in code, but not defined. " | |
790 | "(Cannot continue reasonably from this error.)", | |
791 | fileloc_unparse (e->loc), c)); | |
792 | } | |
793 | else | |
794 | { | |
795 | BADBRANCH; | |
796 | } | |
797 | } | |
798 | ||
799 | llassertprint (!usymtab_exists (c), ("Entry exists: %s", c)); | |
800 | ||
801 | /* | |
802 | ** was supercedeGlobalEntry...is this better? | |
803 | */ | |
804 | ||
805 | if (!context_inIterEnd ()) | |
806 | { | |
807 | if (context_inMacro ()) | |
808 | { | |
809 | if (context_getFlag (FLG_UNRECOG)) | |
810 | { | |
811 | voptgenerror | |
812 | (FLG_MACROUNDEF, | |
813 | message ("Unrecognized identifier in macro definition: %s", c), e->loc); | |
814 | } | |
815 | else | |
816 | { | |
817 | flagcode_recordSuppressed (FLG_UNRECOG); | |
818 | } | |
819 | } | |
820 | else | |
821 | { | |
822 | voptgenerror | |
823 | (FLG_UNRECOG, message ("Unrecognized identifier: %s", c), | |
824 | e->loc); | |
825 | } | |
826 | } | |
827 | ||
828 | e->edata = exprData_makeId (uentry_makeUnrecognized (c, fileloc_copy (loc))); | |
829 | ||
830 | /* No alias errors for unrecognized identifiers */ | |
831 | sRef_setAliasKind (e->sref, AK_ERROR, loc); | |
832 | ||
833 | return (e); | |
834 | } | |
835 | ||
836 | exprNode exprNode_createId (/*@observer@*/ uentry c) | |
837 | { | |
838 | if (uentry_isValid (c)) | |
839 | { | |
840 | exprNode e = exprNode_new (); | |
841 | ||
842 | e->typ = uentry_getType (c); | |
843 | ||
844 | if (uentry_isFunction (c) | |
845 | && !sRef_isLocalVar (uentry_getSref (c))) | |
846 | { | |
847 | e->sref = sRef_undefined; | |
848 | } | |
849 | else | |
850 | { | |
851 | e->sref = uentry_getSref (c); | |
852 | } | |
853 | ||
854 | if (sRef_isStateUnknown (e->sref) && uentry_isNonLocal (c)) | |
855 | { | |
856 | sRef_setDefined (e->sref, fileloc_undefined); | |
857 | } | |
858 | ||
859 | /* | |
860 | ** yoikes! leaving this out was a heinous bug...that would have been | |
861 | ** caught if i had lclint working first. gag! | |
862 | */ | |
863 | ||
864 | e->etext = cstring_undefined; | |
865 | ||
866 | if (uentry_isEitherConstant (c)) | |
867 | { | |
868 | e->kind = XPR_CONST; | |
869 | e->val = multiVal_copy (uentry_getConstantValue (c)); | |
870 | } | |
871 | else | |
872 | { | |
873 | e->kind = XPR_VAR; | |
874 | e->val = multiVal_unknown (); | |
875 | } | |
876 | ||
877 | e->edata = exprData_makeId (c); | |
878 | e->loc = context_getSaveLocation (); | |
879 | ||
880 | if (fileloc_isUndefined (e->loc)) | |
881 | { | |
882 | fileloc_free (e->loc); | |
883 | e->loc = fileloc_copy (g_currentloc); | |
884 | } | |
885 | ||
886 | e->guards = guardSet_new (); | |
887 | e->sets = sRefSet_new (); | |
888 | e->msets = sRefSet_new (); | |
889 | e->uses = sRefSet_new (); | |
890 | ||
891 | /*> missing fields, detected by lclint <*/ | |
892 | e->exitCode = XK_NEVERESCAPE; | |
893 | e->isJumpPoint = FALSE; | |
894 | e->canBreak = FALSE; | |
895 | e->mustBreak = FALSE; | |
896 | ||
84c9ffbf | 897 | exprNode_defineConstraints(e); |
898 | ||
616915dd | 899 | return e; |
900 | } | |
901 | else | |
902 | { | |
903 | return exprNode_createUnknown (); | |
904 | } | |
905 | } | |
906 | ||
907 | /*@notnull@*/ exprNode | |
908 | exprNode_fromIdentifier (/*@observer@*/ uentry c) | |
909 | { | |
910 | exprNode ret; | |
911 | ||
912 | if (context_justPopped ()) /* watch out! c could be dead */ | |
913 | { | |
914 | uentry ce = usymtab_lookupSafe (LastIdentifier ()); | |
915 | ||
916 | if (uentry_isValid (ce)) | |
917 | { | |
918 | c = ce; | |
919 | } | |
920 | else | |
921 | { | |
922 | llbuglit ("Looks like Aunt Millie forgot to walk to dog again."); | |
923 | } | |
924 | } | |
925 | ||
926 | ret = exprNode_fromIdentifierAux (c); | |
927 | ||
928 | return ret; | |
929 | } | |
930 | ||
931 | ||
932 | static /*@only@*/ /*@notnull@*/ exprNode | |
933 | exprNode_fromIdentifierAux (/*@observer@*/ uentry c) | |
934 | { | |
935 | exprNode e = exprNode_createId (c); | |
936 | sRef sr = e->sref; | |
937 | ||
938 | uentry_setUsed (c, e->loc); | |
939 | ||
940 | if (uentry_isVar (c) && sRef_isGlobal (sr)) | |
941 | { | |
942 | checkGlobUse (c, FALSE, e); | |
943 | } | |
944 | ||
945 | return (e); | |
946 | } | |
947 | ||
948 | static bool | |
949 | exprNode_isZero (exprNode e) | |
950 | { | |
951 | if (exprNode_isDefined (e)) | |
952 | { | |
953 | multiVal m = exprNode_getValue (e); | |
954 | ||
955 | if (multiVal_isInt (m)) | |
956 | { | |
957 | return (multiVal_forceInt (m) == 0); | |
958 | } | |
959 | } | |
960 | ||
961 | return FALSE; | |
962 | } | |
963 | ||
964 | static bool | |
965 | exprNode_isNonNegative (exprNode e) | |
966 | { | |
967 | if (exprNode_isDefined (e)) | |
968 | { | |
969 | multiVal m = exprNode_getValue (e); | |
970 | ||
971 | if (multiVal_isInt (m)) | |
972 | { | |
973 | return (multiVal_forceInt (m) >= 0); | |
974 | } | |
975 | } | |
976 | ||
977 | return FALSE; | |
978 | } | |
979 | ||
980 | /* | |
981 | ** a[x] - uses a but NOT a[] | |
982 | ** result sref = a[] (set/use in assignment) | |
983 | ** | |
984 | ** The syntax x[a] is also legal in C, and has the same | |
985 | ** semantics. If ind is an array, and arr is an int, flip | |
986 | ** the arguments. | |
987 | */ | |
988 | ||
989 | /*@only@*/ exprNode | |
990 | exprNode_arrayFetch (/*@only@*/ exprNode e1, /*@only@*/ exprNode e2) | |
991 | { | |
992 | /* | |
993 | ** error in arr, error propagates (no new messages) | |
994 | ** error in ind, assume valid and continue | |
995 | */ | |
996 | ||
997 | if (exprNode_isError (e1)) | |
998 | { | |
999 | exprNode_free (e2); | |
1000 | return (exprNode_makeError ()); | |
1001 | } | |
1002 | else | |
1003 | { | |
1004 | exprNode arr; | |
1005 | exprNode ind; | |
1006 | ctype carr = exprNode_getType (e1); | |
1007 | ctype crarr = ctype_realType (carr); | |
1008 | ||
1009 | /* | |
1010 | ** this sets up funny aliasing, that leads to spurious | |
1011 | ** lclint errors. Hence, the i2 comments. | |
1012 | */ | |
1013 | ||
1014 | if (!ctype_isRealArray (crarr) | |
1015 | && ctype_isRealNumeric (crarr) | |
1016 | && !exprNode_isError (e2) | |
1017 | && ctype_isRealAP (exprNode_getType (e2))) /* fetch like 3[a] */ | |
1018 | { | |
1019 | arr = e2; | |
1020 | ind = e1; | |
1021 | ||
1022 | carr = exprNode_getType (arr); | |
1023 | crarr = ctype_realType (carr); | |
1024 | } | |
1025 | else | |
1026 | { | |
1027 | arr = e1; | |
1028 | ind = e2; | |
1029 | } | |
1030 | ||
1031 | if (sRef_possiblyNull (arr->sref)) | |
1032 | { | |
1033 | if (!usymtab_isGuarded (arr->sref)) | |
1034 | { | |
1035 | if (optgenerror (FLG_NULLDEREF, | |
1036 | message ("Index of %s pointer %q: %s", | |
1037 | sRef_nullMessage (arr->sref), | |
1038 | sRef_unparse (arr->sref), | |
1039 | exprNode_unparse (arr)), | |
1040 | arr->loc)) | |
1041 | { | |
1042 | sRef_showNullInfo (arr->sref); | |
1043 | ||
1044 | /* suppress future messages */ | |
1045 | sRef_setNullError (arr->sref); | |
1046 | } | |
1047 | } | |
1048 | } | |
1049 | ||
1050 | if (exprNode_isError (ind)) | |
1051 | { | |
1052 | if ((ctype_isArrayPtr (crarr) | |
1053 | && !ctype_isFunction (crarr)) | |
1054 | || ctype_isUnknown (carr)) | |
1055 | { | |
1056 | exprNode ret = exprNode_createPartialCopy (arr); | |
1057 | ||
1058 | if (ctype_isKnown (carr)) | |
1059 | { | |
1060 | ret->typ = ctype_baseArrayPtr (crarr); | |
1061 | } | |
1062 | else | |
1063 | { | |
1064 | ret->typ = ctype_unknown; | |
1065 | } | |
1066 | ||
1067 | ret->sref = sRef_makeArrayFetch (arr->sref); | |
1068 | ||
1069 | ret->kind = XPR_FETCH; | |
1070 | ||
1071 | /* | |
1072 | ** Because of funny aliasing (when arr and ind are | |
1073 | ** flipped) spurious errors would be reported here. | |
1074 | */ | |
1075 | ||
1076 | /*@i2@*/ ret->edata = exprData_makePair (arr, ind); | |
1077 | checkSafeUse (ret, arr->sref); | |
1078 | return (ret); | |
1079 | } | |
1080 | else | |
1081 | { | |
1082 | voptgenerror (FLG_TYPE, | |
1083 | message ("Array fetch from non-array (%t): %s[%s]", carr, | |
1084 | exprNode_unparse (e1), exprNode_unparse (e2)), | |
1085 | arr->loc); | |
1086 | exprNode_free (arr); | |
1087 | return (exprNode_makeError ()); | |
1088 | } | |
1089 | } | |
1090 | else | |
1091 | { | |
1092 | if (!ctype_isForceRealInt (&(ind->typ))) | |
1093 | { | |
1094 | ctype rt = ctype_realType (ind->typ); | |
1095 | ||
1096 | if (ctype_isChar (rt)) | |
1097 | { | |
1098 | vnoptgenerror | |
1099 | (FLG_CHARINDEX, | |
1100 | message ("Array fetch using non-integer, %t: %s[%s]", | |
1101 | ind->typ, | |
1102 | exprNode_unparse (e1), exprNode_unparse (e2)), | |
1103 | arr->loc); | |
1104 | } | |
1105 | else if (ctype_isEnum (rt)) | |
1106 | { | |
1107 | vnoptgenerror | |
1108 | (FLG_ENUMINDEX, | |
1109 | message ("Array fetch using non-integer, %t: %s[%s]", | |
1110 | ind->typ, | |
1111 | exprNode_unparse (e1), exprNode_unparse (e2)), | |
1112 | arr->loc); | |
1113 | } | |
1114 | else | |
1115 | { | |
1116 | voptgenerror | |
1117 | (FLG_TYPE, | |
1118 | message ("Array fetch using non-integer, %t: %s[%s]", | |
1119 | ind->typ, | |
1120 | exprNode_unparse (e1), exprNode_unparse (e2)), | |
1121 | arr->loc); | |
1122 | } | |
1123 | ||
1124 | multiVal_free (ind->val); | |
1125 | ind->val = multiVal_unknown (); | |
1126 | } | |
1127 | ||
1128 | if (ctype_isArrayPtr (crarr) && !ctype_isFunction (crarr)) | |
1129 | { | |
1130 | exprNode ret = exprNode_createSemiCopy (arr); | |
1131 | multiVal m = exprNode_getValue (ind); | |
1132 | ||
1133 | ret->typ = ctype_baseArrayPtr (crarr); | |
1134 | ret->kind = XPR_FETCH; | |
1135 | ||
1136 | if (multiVal_isInt (m)) | |
1137 | { | |
1138 | int i = (int) multiVal_forceInt (m); | |
1139 | ||
1140 | if (sRef_isValid (arr->sref)) { | |
1141 | ret->sref = sRef_makeArrayFetchKnown (arr->sref, i); | |
1142 | } else { | |
1143 | ret->sref = sRef_undefined; | |
1144 | } | |
1145 | } | |
1146 | else | |
1147 | { | |
1148 | ret->sref = sRef_makeArrayFetch (arr->sref); | |
1149 | } | |
1150 | ||
1151 | ret->sets = sRefSet_realNewUnion (arr->sets, ind->sets); | |
1152 | ret->msets = sRefSet_realNewUnion (arr->msets, ind->msets); | |
1153 | ret->uses = sRefSet_realNewUnion (arr->uses, ind->uses); | |
1154 | ||
1155 | /* (see comment on spurious errors above) */ | |
1156 | /*@i2@*/ ret->edata = exprData_makePair (arr, ind); | |
1157 | ||
1158 | exprNode_checkUse (ret, ind->sref, ind->loc); | |
1159 | exprNode_checkUse (ret, arr->sref, arr->loc); | |
1160 | ||
1161 | return (ret); | |
1162 | } | |
1163 | else | |
1164 | { | |
1165 | if (ctype_isUnknown (carr)) | |
1166 | { | |
1167 | exprNode ret = exprNode_createPartialCopy (arr); | |
1168 | ||
1169 | ret->kind = XPR_FETCH; | |
1170 | ret->typ = ctype_unknown; | |
1171 | ret->sets = sRefSet_union (ret->sets, ind->sets); | |
1172 | ret->msets = sRefSet_union (ret->msets, ind->msets); | |
1173 | ret->uses = sRefSet_union (ret->uses, ind->uses); | |
1174 | ||
1175 | /* (see comment on spurious errors above) */ | |
1176 | /*@i2@*/ ret->edata = exprData_makePair (arr, ind); | |
1177 | ||
1178 | exprNode_checkUse (ret, ind->sref, ind->loc); | |
1179 | exprNode_checkUse (ret, arr->sref, arr->loc); | |
1180 | return (ret); | |
1181 | } | |
1182 | else | |
1183 | { | |
1184 | voptgenerror | |
1185 | (FLG_TYPE, | |
1186 | message ("Array fetch from non-array (%t): %s[%s]", carr, | |
1187 | exprNode_unparse (e1), exprNode_unparse (e2)), | |
1188 | arr->loc); | |
1189 | ||
1190 | exprNode_free (arr); | |
1191 | exprNode_free (ind); | |
1192 | ||
1193 | return (exprNode_makeError ()); | |
1194 | } | |
1195 | } | |
1196 | } | |
1197 | } | |
1198 | BADEXIT; | |
1199 | } | |
1200 | ||
1201 | ||
1202 | static int | |
1203 | checkArgs (uentry fcn, /*@dependent@*/ exprNode f, ctype t, | |
1204 | exprNodeList args, exprNode ret) | |
1205 | { | |
1206 | return (checkArgsReal (fcn, f, ctype_argsFunction (t), args, FALSE, ret)); | |
1207 | } | |
1208 | ||
1209 | /* | |
1210 | ** checkPrintfArgs --- checks arguments for printf-like functions | |
1211 | ** Arguments before ... have already been checked. | |
1212 | ** The argument before the ... is a char *. | |
1213 | ** argno is the format string argument. | |
1214 | */ | |
1215 | ||
1216 | static void | |
1217 | checkPrintfArgs (/*@notnull@*/ /*@dependent@*/ exprNode f, uentry fcn, | |
1218 | exprNodeList args, exprNode ret, int argno) | |
1219 | { | |
1220 | /* | |
1221 | ** the last argument before the elips is the format string | |
1222 | */ | |
1223 | ||
1224 | int i = argno; | |
1225 | fileloc formatloc; | |
1226 | int nargs = exprNodeList_size (args); | |
1227 | uentryList params = uentry_getParams (fcn); | |
1228 | exprNode a; | |
1229 | ||
1230 | /* | |
1231 | ** These should be ensured by checkSpecialFunction | |
1232 | */ | |
1233 | ||
1234 | llassert (uentryList_size (params) == argno + 1); | |
1235 | llassert (uentry_isElipsisMarker (uentryList_getN (params, argno))); | |
1236 | ||
1237 | a = exprNodeList_getN (args, argno - 1); | |
1238 | formatloc = fileloc_copy (exprNode_loc (a)); | |
1239 | ||
1240 | if (exprNode_isDefined (a) && exprNode_isStringLiteral (a) | |
1241 | && exprNode_knownStringValue (a)) | |
1242 | { | |
1243 | char *format = cstring_toCharsSafe (multiVal_forceString (exprNode_getValue (a))); | |
1244 | char *code = format; | |
1245 | char *ocode = code; | |
1246 | ||
1247 | nargs = exprNodeList_size (args); | |
1248 | ||
1249 | while ((code = strchr (code, '%')) != NULL) | |
1250 | { | |
1251 | char *origcode = code; | |
1252 | char key = *(++code); | |
1253 | ctype modtype = ctype_int; | |
1254 | bool modified = FALSE; | |
1255 | ||
1256 | fileloc_addColumn (formatloc, code - ocode); | |
1257 | ||
1258 | /* ignore flags */ | |
1259 | while (isFlagKey (key)) | |
1260 | { | |
1261 | key = *(++code); | |
1262 | fileloc_incColumn (formatloc); | |
1263 | } | |
1264 | ||
1265 | if (key == 'm') /* skipped in syslog */ | |
1266 | { | |
1267 | continue; | |
1268 | } | |
1269 | ||
1270 | /* ignore field width */ | |
1271 | while (isdigit ((int) key) != 0) | |
1272 | { | |
1273 | key = *(++code); | |
1274 | fileloc_incColumn (formatloc); | |
1275 | } | |
1276 | ||
1277 | /* ignore precision */ | |
1278 | if (key == '.') | |
1279 | { | |
1280 | key = *(++code); | |
1281 | fileloc_incColumn (formatloc); | |
1282 | ||
1283 | /* | |
1284 | ** In printf, '*' means: read the next arg as an int for the | |
1285 | ** field width. This seems to be missing from my copy of the | |
1286 | ** standard x3.159-1989. Setion 4.9.6.1 refers to * (described | |
1287 | ** later) but never does. | |
1288 | */ | |
1289 | ||
1290 | if (key == '*') | |
1291 | { | |
1292 | ; /* don't do anything --- handle later */ | |
1293 | } | |
1294 | else | |
1295 | { | |
1296 | while (isdigit ((int) key) != 0) | |
1297 | { | |
1298 | key = *(++code); | |
1299 | fileloc_incColumn (formatloc); | |
1300 | } | |
1301 | } | |
1302 | } | |
1303 | ||
1304 | if (key == 'h') | |
1305 | { | |
1306 | modtype = ctype_sint; /* short */ | |
1307 | key = *(++code); | |
1308 | fileloc_incColumn (formatloc); | |
1309 | } | |
1310 | else if (key == 'l' || key == 'L') | |
1311 | { | |
1312 | modtype = ctype_lint; /* long */ | |
1313 | key = *(++code); | |
1314 | fileloc_incColumn (formatloc); | |
1315 | ||
1316 | if (key == 'l' || key == 'L') { | |
1317 | modtype = ctype_llint; /* long long */ | |
1318 | key = *(++code); | |
1319 | fileloc_incColumn (formatloc); | |
1320 | } | |
1321 | } | |
1322 | else | |
1323 | { | |
1324 | ; /* no modifier */ | |
1325 | } | |
1326 | ||
1327 | /* now, key = type of conversion to apply */ | |
1328 | ++code; | |
1329 | fileloc_incColumn (formatloc); | |
1330 | ||
1331 | if (key != '%') | |
1332 | { | |
1333 | if (i >= nargs) | |
1334 | { | |
1335 | if (optgenerror | |
1336 | (FLG_TYPE, | |
1337 | message ("No argument corresponding to %q format " | |
1338 | "code %d (%%%h): \"%s\"", | |
1339 | uentry_getName (fcn), | |
1340 | i, key, | |
1341 | cstring_fromChars (format)), | |
1342 | f->loc)) | |
1343 | { | |
1344 | if (fileloc_isDefined (formatloc) | |
1345 | && context_getFlag (FLG_SHOWCOL)) | |
1346 | { | |
1347 | llgenindentmsg (cstring_makeLiteral ("Corresponding format code"), | |
1348 | formatloc); | |
1349 | } | |
1350 | } | |
1351 | i++; | |
1352 | } | |
1353 | else | |
1354 | { | |
1355 | a = exprNodeList_getN (args, i); | |
1356 | i++; | |
1357 | ||
1358 | if (!exprNode_isError (a)) | |
1359 | { | |
1360 | ctype expecttype; | |
1361 | ||
1362 | switch (key) | |
1363 | { | |
1364 | case '*': /* int argument for fieldwidth */ | |
1365 | expecttype = ctype_int; | |
1366 | *(--code) = '%'; /* convert it for next code */ | |
1367 | fileloc_subColumn (formatloc, 1); | |
1368 | /*@switchbreak@*/ break; | |
1369 | case 'u': | |
1370 | case 'o': | |
1371 | expecttype = ctype_combine (ctype_uint, modtype); | |
1372 | /*@switchbreak@*/ break; | |
1373 | ||
1374 | case 'i': /* int argument */ | |
1375 | case 'd': | |
1376 | expecttype = ctype_combine (ctype_int, modtype); | |
1377 | /*@switchbreak@*/ break; | |
1378 | ||
1379 | case 'x': /* unsigned int */ | |
1380 | case 'X': | |
1381 | expecttype = ctype_combine (ctype_uint, modtype); | |
1382 | /*@switchbreak@*/ break; | |
1383 | ||
1384 | case 'e': | |
1385 | case 'E': | |
1386 | case 'g': | |
1387 | case 'G': | |
1388 | case 'f': /* double */ | |
1389 | expecttype = ctype_combine (ctype_double, modtype); | |
1390 | /*@switchbreak@*/ break; | |
1391 | ||
1392 | case 'c': /* int converted to char (check its a char?) */ | |
1393 | expecttype = ctype_makeConj (ctype_char, ctype_uchar); | |
1394 | /*@switchbreak@*/ break; | |
1395 | ||
1396 | case 's': /* string */ | |
1397 | expecttype = ctype_string; | |
1398 | /*@switchbreak@*/ break; | |
1399 | case '[': | |
1400 | /* skip to ']' */ | |
1401 | while (((key = *(++code)) != ']') | |
1402 | && (key != '\0')) | |
1403 | { | |
1404 | fileloc_incColumn (formatloc); | |
1405 | } | |
1406 | ||
1407 | if (key == '\0') | |
1408 | { | |
1409 | llfatalerrorLoc | |
1410 | (message ("Bad character set format: %s", | |
1411 | cstring_fromChars (origcode))); | |
1412 | } | |
1413 | ||
1414 | expecttype = ctype_string; | |
1415 | /*@switchbreak@*/ break; | |
1416 | ||
1417 | case 'p': /* pointer */ | |
1418 | expecttype = ctype_makePointer (ctype_void); | |
1419 | /* really! */ | |
1420 | /*@switchbreak@*/ break; | |
1421 | ||
1422 | case 'n': /* pointer to int, modified by call! */ | |
1423 | expecttype = ctype_combine (ctype_makePointer (ctype_int), modtype); | |
1424 | modified = TRUE; | |
1425 | uentry_setDefState (regArg, SS_ALLOCATED); /* corresponds to out */ | |
1426 | /*@switchbreak@*/ break; | |
1427 | ||
1428 | case 'm': /* in a syslog, it doesn't consume an argument */ | |
1429 | /* should check we're really doing syslog */ | |
1430 | ||
1431 | /*@switchbreak@*/ break; | |
1432 | ||
1433 | ||
1434 | default: | |
1435 | expecttype = ctype_unknown; | |
1436 | ||
1437 | voptgenerror | |
1438 | (FLG_FORMATCODE, | |
1439 | message ("Unrecognized format code: %s", | |
1440 | cstring_fromChars (origcode)), | |
1441 | fileloc_isDefined (formatloc) | |
1442 | ? formatloc : g_currentloc); | |
1443 | ||
1444 | /*@switchbreak@*/ break; | |
1445 | } | |
1446 | ||
1447 | if (!(exprNode_matchArgType (expecttype, a))) | |
1448 | { | |
1449 | if (ctype_isVoidPointer (expecttype) | |
1450 | && ctype_isRealAbstract (a->typ) | |
1451 | && (context_getFlag (FLG_ABSTVOIDP))) | |
1452 | { | |
1453 | ; | |
1454 | } | |
1455 | else | |
1456 | { | |
1457 | if (llgenformattypeerror | |
1458 | (expecttype, exprNode_undefined, | |
1459 | a->typ, a, | |
1460 | message ("Format argument %d to %q (%%%h) expects " | |
1461 | "%t gets %t: %s", | |
1462 | i - argno, | |
1463 | uentry_getName (fcn), | |
1464 | key, expecttype, | |
1465 | a->typ, exprNode_unparse (a)), | |
1466 | a->loc)) | |
1467 | { | |
1468 | if (fileloc_isDefined (formatloc) | |
1469 | && context_getFlag (FLG_SHOWCOL)) | |
1470 | { | |
1471 | llgenindentmsg | |
1472 | (cstring_makeLiteral | |
1473 | ("Corresponding format code"), | |
1474 | formatloc); | |
1475 | } | |
1476 | } | |
1477 | } | |
1478 | } | |
1479 | ||
1480 | uentry_setType (regArg, expecttype); | |
1481 | checkOneArg (regArg, a, f, FALSE, i+1, nargs); | |
1482 | ||
1483 | if (ctype_equal (expecttype, ctype_string)) | |
1484 | { | |
1485 | exprNode_checkUse (a, sRef_makePointer (a->sref), a->loc); | |
1486 | } | |
1487 | ||
1488 | uentry_setType (regArg, ctype_unknown); | |
1489 | uentry_fixupSref (regArg); | |
1490 | ||
1491 | if (modified) | |
1492 | { | |
1493 | exprNode_checkCallModifyVal (a->sref, args, f, ret); | |
1494 | } | |
1495 | } | |
1496 | else | |
1497 | { | |
1498 | ; | |
1499 | } | |
1500 | } | |
1501 | } | |
1502 | ocode = code; | |
1503 | } | |
1504 | ||
1505 | if (i < nargs) | |
1506 | { | |
1507 | voptgenerror (FLG_TYPE, | |
1508 | message ("Format string for %q has %d arg%p, given %d", | |
1509 | uentry_getName (fcn), i - argno, nargs - argno), | |
1510 | f->loc); | |
1511 | } | |
1512 | } | |
1513 | else | |
1514 | { | |
1515 | /* no checking possible for compile-time unknown format strings */ | |
1516 | } | |
1517 | ||
1518 | fileloc_free (formatloc); | |
1519 | } | |
1520 | ||
1521 | static void | |
1522 | checkScanfArgs (/*@notnull@*/ /*@dependent@*/ exprNode f, uentry fcn, | |
1523 | exprNodeList args, exprNode ret, int argno) | |
1524 | { | |
1525 | int i = argno; | |
1526 | fileloc formatloc; | |
1527 | int nargs = exprNodeList_size (args); | |
1528 | uentryList params = uentry_getParams (fcn); | |
1529 | exprNode a; | |
1530 | ||
1531 | /* | |
1532 | ** These should be ensured by checkSpecialFunction | |
1533 | */ | |
1534 | ||
1535 | llassert (uentryList_size (params) == argno + 1); | |
1536 | llassert (uentry_isElipsisMarker (uentryList_getN (params, argno))); | |
1537 | ||
1538 | a = exprNodeList_getN (args, argno - 1); | |
1539 | formatloc = fileloc_copy (exprNode_loc (a)); | |
1540 | ||
1541 | if (exprNode_isDefined (a) && exprNode_isStringLiteral (a) | |
1542 | && exprNode_knownStringValue (a)) | |
1543 | { | |
1544 | char *format = cstring_toCharsSafe (multiVal_forceString (exprNode_getValue (a))); | |
1545 | char *code = format; | |
1546 | char *ocode = code; | |
1547 | ||
1548 | nargs = exprNodeList_size (args); | |
1549 | ||
1550 | while ((code = strchr (code, '%')) != NULL) | |
1551 | { | |
1552 | char *origcode = code; | |
1553 | char key = *(++code); | |
1554 | ctype modtype = ctype_int; | |
1555 | char modifier = '\0'; | |
1556 | bool modified = TRUE; | |
1557 | bool ignore = FALSE; | |
1558 | ||
1559 | fileloc_addColumn (formatloc, code - ocode); | |
1560 | ||
1561 | /* | |
1562 | ** this is based on ANSI standard library description of fscanf | |
1563 | ** (from ANSI standard X3.159-1989, 4.9.6.1) | |
1564 | */ | |
1565 | ||
1566 | /* '*' suppresses assignment (does not need match argument) */ | |
1567 | ||
1568 | if (key == '*') | |
1569 | { | |
1570 | key = *(++code); | |
1571 | modified = FALSE; | |
1572 | ignore = TRUE; | |
1573 | fileloc_incColumn (formatloc); | |
1574 | } | |
1575 | ||
1576 | /* ignore field width */ | |
1577 | while (isdigit ((int) key) != 0) | |
1578 | { | |
1579 | key = *(++code); | |
1580 | fileloc_incColumn (formatloc); | |
1581 | } | |
1582 | ||
1583 | if (key == 'h') | |
1584 | { | |
1585 | modtype = ctype_sint; /* short */ | |
1586 | key = *(++code); | |
1587 | fileloc_incColumn (formatloc); | |
1588 | } | |
1589 | else if (key == 'l' || key == 'L') | |
1590 | { | |
1591 | modtype = ctype_lint; /* long */ | |
1592 | modifier = key; | |
1593 | ||
1594 | key = *(++code); | |
1595 | fileloc_incColumn (formatloc); | |
1596 | ||
1597 | if (key == 'l' || key == 'L') { | |
1598 | modtype = ctype_llint; /* long long */ | |
1599 | key = *(++code); | |
1600 | fileloc_incColumn (formatloc); | |
1601 | } | |
1602 | } | |
1603 | else | |
1604 | { | |
1605 | ; /* no modifier */ | |
1606 | } | |
1607 | ||
1608 | /* now, key = type of conversion to apply */ | |
1609 | ++code; | |
1610 | fileloc_incColumn (formatloc); | |
1611 | ||
1612 | if (key != '%') | |
1613 | { | |
1614 | if (ignore) | |
1615 | { | |
1616 | ; | |
1617 | } | |
1618 | else | |
1619 | { | |
1620 | if (i >= nargs) | |
1621 | { | |
1622 | if (optgenerror | |
1623 | (FLG_TYPE, | |
1624 | message ("No argument corresponding to %q format " | |
1625 | "code %d (%%%h): \"%s\"", | |
1626 | uentry_getName (fcn), | |
1627 | i, key, | |
1628 | cstring_fromChars (format)), | |
1629 | f->loc)) | |
1630 | { | |
1631 | if (fileloc_isDefined (formatloc) | |
1632 | && context_getFlag (FLG_SHOWCOL)) | |
1633 | { | |
1634 | llgenindentmsg | |
1635 | (cstring_makeLiteral ("Corresponding format code"), | |
1636 | formatloc); | |
1637 | } | |
1638 | } | |
1639 | i++; | |
1640 | } | |
1641 | else | |
1642 | { | |
1643 | a = exprNodeList_getN (args, i); | |
1644 | i++; | |
1645 | ||
1646 | if (!exprNode_isError (a)) | |
1647 | { | |
1648 | ctype expecttype; | |
1649 | ||
1650 | switch (key) | |
1651 | { | |
1652 | case '*': /* int argument for fieldwidth */ | |
1653 | expecttype = ctype_makePointer (ctype_int); | |
1654 | *(--code) = '%'; /* convert it for next code */ | |
1655 | fileloc_subColumn (formatloc, 1); | |
1656 | /*@switchbreak@*/ break; | |
1657 | case 'u': | |
1658 | case 'o': | |
1659 | expecttype = ctype_makePointer (ctype_combine (ctype_uint, modtype)); | |
1660 | /*@switchbreak@*/ break; | |
1661 | ||
1662 | case 'i': | |
1663 | case 'd': | |
1664 | case 'x': | |
1665 | case 'X': /* unsigned int */ | |
1666 | expecttype = ctype_makePointer (ctype_combine (ctype_int, modtype)); | |
1667 | /*@switchbreak@*/ break; | |
1668 | ||
1669 | case 'e': | |
1670 | case 'E': | |
1671 | case 'g': | |
1672 | case 'G': | |
1673 | case 'f': | |
1674 | /* printf is double, scanf is float! */ | |
1675 | ||
1676 | if (modifier == 'l') | |
1677 | { | |
1678 | expecttype = ctype_makePointer (ctype_double); | |
1679 | } | |
1680 | else if (modifier == 'L') | |
1681 | { | |
1682 | expecttype = ctype_makePointer (ctype_ldouble); | |
1683 | } | |
1684 | else | |
1685 | { | |
1686 | llassert (modifier == '\0'); | |
1687 | expecttype = ctype_makePointer (ctype_float); | |
1688 | } | |
1689 | /*@switchbreak@*/ break; | |
1690 | ||
1691 | case 'c': /* int converted to char (check its a char?) */ | |
1692 | expecttype = ctype_makePointer (ctype_makeConj (ctype_char, ctype_uchar)); | |
1693 | /*@switchbreak@*/ break; | |
1694 | ||
1695 | case 's': /* string */ | |
1696 | expecttype = ctype_string; | |
1697 | /*@switchbreak@*/ break; | |
1698 | ||
1699 | case '[': | |
1700 | /* skip to ']' */ | |
1701 | while (((key = *(++code)) != ']') | |
1702 | && (key != '\0')) | |
1703 | { | |
1704 | fileloc_incColumn (formatloc); | |
1705 | } | |
1706 | ||
1707 | if (key == '\0') | |
1708 | { | |
1709 | llfatalerrorLoc | |
1710 | (message ("Bad character set format: %s", | |
1711 | cstring_fromChars (origcode))); | |
1712 | } | |
1713 | ||
1714 | expecttype = ctype_string; | |
1715 | /*@switchbreak@*/ break; | |
1716 | ||
1717 | case 'p': /* pointer */ | |
1718 | expecttype = ctype_unknown; | |
1719 | /* really! */ | |
1720 | /*@switchbreak@*/ break; | |
1721 | ||
1722 | case 'n': /* pointer to int, modified by call! */ | |
1723 | expecttype = ctype_makePointer (ctype_int); | |
1724 | /*@switchbreak@*/ break; | |
1725 | ||
1726 | default: | |
1727 | expecttype = ctype_unknown; | |
1728 | ||
1729 | voptgenerror | |
1730 | (FLG_FORMATCODE, | |
1731 | message ("Unrecognized format code: %s", | |
1732 | cstring_fromChars (origcode)), | |
1733 | fileloc_isDefined (formatloc) | |
1734 | ? formatloc : g_currentloc); | |
1735 | ||
1736 | /*@switchbreak@*/ break; | |
1737 | } | |
1738 | ||
1739 | if (!(exprNode_matchArgType (expecttype, a))) | |
1740 | { | |
1741 | if (ctype_isVoidPointer (expecttype) | |
1742 | && ctype_isRealAbstract (a->typ) | |
1743 | && (context_getFlag (FLG_ABSTVOIDP))) | |
1744 | { | |
1745 | ; | |
1746 | } | |
1747 | else | |
1748 | { | |
1749 | if (modifier != '\0') | |
1750 | { | |
1751 | if (llgenformattypeerror | |
1752 | (expecttype, exprNode_undefined, | |
1753 | a->typ, a, | |
1754 | message ("Format argument %d to %q (%%%h%h) expects " | |
1755 | "%t gets %t: %s", | |
1756 | i - argno, | |
1757 | uentry_getName (fcn), | |
1758 | modifier, | |
1759 | key, expecttype, | |
1760 | a->typ, exprNode_unparse (a)), | |
1761 | a->loc)) | |
1762 | { | |
1763 | if (fileloc_isDefined (formatloc) | |
1764 | && context_getFlag (FLG_SHOWCOL)) | |
1765 | { | |
1766 | llgenindentmsg | |
1767 | (cstring_makeLiteral | |
1768 | ("Corresponding format code"), | |
1769 | formatloc); | |
1770 | } | |
1771 | } | |
1772 | ||
1773 | } | |
1774 | else | |
1775 | { | |
1776 | if (llgenformattypeerror | |
1777 | (expecttype, exprNode_undefined, | |
1778 | a->typ, a, | |
1779 | message ("Format argument %d to %q (%%%h) expects " | |
1780 | "%t gets %t: %s", | |
1781 | i - argno, | |
1782 | uentry_getName (fcn), | |
1783 | key, expecttype, | |
1784 | a->typ, exprNode_unparse (a)), | |
1785 | a->loc)) | |
1786 | { | |
1787 | if (fileloc_isDefined (formatloc) | |
1788 | && context_getFlag (FLG_SHOWCOL)) | |
1789 | { | |
1790 | llgenindentmsg | |
1791 | (cstring_makeLiteral | |
1792 | ("Corresponding format code"), | |
1793 | formatloc); | |
1794 | } | |
1795 | } | |
1796 | } | |
1797 | } | |
1798 | } | |
1799 | ||
1800 | uentry_setType (outArg, expecttype); | |
1801 | checkOneArg (outArg, a, f, FALSE, i+1, nargs); | |
1802 | uentry_setType (outArg, ctype_unknown); | |
1803 | uentry_fixupSref (outArg); | |
1804 | ||
1805 | if (modified) | |
1806 | { | |
1807 | exprNode_checkCallModifyVal (a->sref, args, f, ret); | |
1808 | } | |
1809 | } | |
1810 | else | |
1811 | { | |
1812 | /* a->sref = defref; */ | |
1813 | } | |
1814 | } | |
1815 | } | |
1816 | } | |
1817 | ocode = code; | |
1818 | } | |
1819 | ||
1820 | if (i < nargs) | |
1821 | { | |
1822 | voptgenerror (FLG_TYPE, | |
1823 | message ("Format string for %q has %d arg%p, given %d", | |
1824 | uentry_getName (fcn), i - argno, nargs - argno), | |
1825 | f->loc); | |
1826 | } | |
1827 | } | |
1828 | else | |
1829 | { | |
1830 | /* no checking possible for compile-time unknown format strings */ | |
1831 | } | |
1832 | ||
1833 | fileloc_free (formatloc); | |
1834 | } | |
1835 | ||
1836 | static void | |
1837 | checkMessageArgs (/*@notnull@*/ /*@dependent@*/ exprNode f, | |
1838 | uentry fcn, | |
1839 | exprNodeList args, | |
1840 | /*@unused@*/ int argno) | |
1841 | { | |
1842 | /* | |
1843 | ** the last argument before the elips is the format string | |
1844 | */ | |
1845 | ||
1846 | int nargs = exprNodeList_size (args); | |
1847 | int i = argno; | |
1848 | fileloc formatloc; | |
1849 | exprNode a; | |
1850 | ||
1851 | a = exprNodeList_getN (args, argno - 1); | |
1852 | formatloc = fileloc_copy (exprNode_loc (a)); | |
1853 | ||
1854 | if (ctype_isUnknown (cstringType)) { | |
1855 | if (usymtab_existsType (cstring_makeLiteralTemp ("cstring"))) | |
1856 | { | |
1857 | cstringType = usymtab_lookupAbstractType (cstring_makeLiteralTemp ("cstring")); | |
1858 | } | |
1859 | } | |
1860 | ||
1861 | if (ctype_isUnknown (ctypeType)) { | |
1862 | if (usymtab_existsType (cstring_makeLiteralTemp ("ctype"))) | |
1863 | { | |
1864 | ctypeType = usymtab_lookupAbstractType (cstring_makeLiteralTemp ("ctype")); | |
1865 | } | |
1866 | } | |
1867 | ||
1868 | if (ctype_isUnknown (filelocType)) { | |
1869 | if (usymtab_existsType (cstring_makeLiteralTemp ("fileloc"))) | |
1870 | { | |
1871 | filelocType = usymtab_lookupAbstractType (cstring_makeLiteralTemp ("fileloc")); | |
1872 | } | |
1873 | } | |
1874 | ||
1875 | if (exprNode_isDefined (a) && exprNode_isStringLiteral (a) | |
1876 | && exprNode_knownStringValue (a)) | |
1877 | { | |
1878 | cstring format = multiVal_forceString (exprNode_getValue (a)); | |
1879 | char *code = cstring_toCharsSafe (format); | |
1880 | char *ocode = code; | |
1881 | ||
1882 | nargs = exprNodeList_size (args); | |
1883 | ||
1884 | while ((code = strchr (code, '%')) != NULL) | |
1885 | { | |
1886 | char *origcode = code; | |
1887 | char key = *(++code); | |
1888 | bool isOnly = FALSE; | |
1889 | ||
1890 | fileloc_addColumn (formatloc, code - ocode); | |
1891 | ||
1892 | while (key >= '0' && key <= '9') | |
1893 | { | |
1894 | key = *(++code); | |
1895 | fileloc_incColumn (formatloc); | |
1896 | } | |
1897 | ||
1898 | ++code; | |
1899 | fileloc_incColumn (formatloc); | |
1900 | ||
1901 | if (key != '%') | |
1902 | { | |
1903 | if (key == 'p') | |
1904 | { | |
1905 | goto nextKey; | |
1906 | } | |
1907 | ||
1908 | if (i >= nargs) | |
1909 | { | |
1910 | voptgenerror | |
1911 | (FLG_TYPE, | |
1912 | message ("Message missing format arg %d (%%%h): \"%s\"", | |
1913 | i + 1, key, format), | |
1914 | f->loc); | |
1915 | i++; | |
1916 | } | |
1917 | else | |
1918 | { | |
1919 | a = exprNodeList_getN (args, i); | |
1920 | i++; | |
1921 | ||
1922 | nextKey: | |
1923 | if (!exprNode_isError (a)) | |
1924 | { | |
1925 | ctype expecttype; | |
1926 | ||
1927 | /*@-loopswitchbreak@*/ | |
1928 | ||
1929 | switch (key) | |
1930 | { | |
1931 | case 'c': | |
1932 | case 'h': | |
1933 | expecttype = ctype_char; break; | |
1934 | case 's': | |
1935 | expecttype = cstringType; break; | |
1936 | case 'q': | |
1937 | expecttype = cstringType; isOnly = TRUE; break; | |
1938 | case 'x': | |
1939 | expecttype = cstringType; isOnly = TRUE; break; | |
1940 | case 'd': expecttype = ctype_int; break; | |
1941 | case 'u': expecttype = ctype_uint; break; | |
1942 | case 'w': expecttype = ctype_ulint; break; | |
1943 | case 'f': expecttype = ctype_float; break; | |
1944 | case 'b': expecttype = ctype_bool; break; | |
1945 | case 't': expecttype = ctypeType; break; | |
1946 | case 'l': expecttype = filelocType; break; | |
1947 | case 'p': /* a wee bit of a hack methinks */ | |
1948 | expecttype = ctype_int; | |
1949 | break; | |
1950 | case 'r': expecttype = ctype_bool; break; | |
1951 | default: | |
1952 | expecttype = ctype_unknown; | |
1953 | voptgenerror | |
1954 | (FLG_FORMATCODE, | |
1955 | message ("Unrecognized format code: %s", | |
1956 | cstring_fromChars (origcode)), | |
1957 | fileloc_isDefined (formatloc) | |
1958 | ? formatloc : g_currentloc); | |
1959 | break; | |
1960 | } | |
1961 | /*@=loopswitchbreak@*/ | |
1962 | ||
1963 | if (!(exprNode_matchArgType (expecttype, a))) | |
1964 | { | |
1965 | if (ctype_isVoidPointer (expecttype) | |
1966 | && ctype_isRealAbstract (a->typ) | |
1967 | && (context_getFlag (FLG_ABSTVOIDP))) | |
1968 | { | |
1969 | ; | |
1970 | } | |
1971 | else | |
1972 | { | |
1973 | if (llgenformattypeerror | |
1974 | (expecttype, exprNode_undefined, | |
1975 | a->typ, a, | |
1976 | message ("Format argument %d to %q (%%%h) expects " | |
1977 | "%t gets %t: %s", | |
1978 | i - argno, | |
1979 | uentry_getName (fcn), | |
1980 | key, expecttype, | |
1981 | a->typ, exprNode_unparse (a)), | |
1982 | a->loc)) | |
1983 | { | |
1984 | if (fileloc_isDefined (formatloc) | |
1985 | && context_getFlag (FLG_SHOWCOL)) | |
1986 | { | |
1987 | llgenindentmsg | |
1988 | (cstring_makeLiteral | |
1989 | ("Corresponding format code"), | |
1990 | formatloc); | |
1991 | } | |
1992 | } | |
1993 | } | |
1994 | } | |
1995 | ||
1996 | if (ctype_equal (expecttype, cstringType)) | |
1997 | { | |
1998 | if (isOnly) | |
1999 | { | |
2000 | checkOneArg (csOnlyArg, a, f, FALSE, i+1, nargs); | |
2001 | uentry_fixupSref (csOnlyArg); | |
2002 | } | |
2003 | else | |
2004 | { | |
2005 | checkOneArg (csArg, a, f, FALSE, i+1, nargs); | |
2006 | uentry_fixupSref (csArg); | |
2007 | } | |
2008 | } | |
2009 | else | |
2010 | { | |
2011 | checkOneArg (regArg, a, f, FALSE, i+1, nargs); | |
2012 | uentry_fixupSref (regArg); | |
2013 | } | |
2014 | } | |
2015 | } | |
2016 | } | |
2017 | } | |
2018 | ||
2019 | if (i < nargs) | |
2020 | { | |
2021 | voptgenerror (FLG_TYPE, | |
2022 | message ("Format string for %q has %d arg%p, given %d", | |
2023 | uentry_getName (fcn), i - argno, nargs -argno), | |
2024 | f->loc); | |
2025 | } | |
2026 | } | |
2027 | else | |
2028 | { | |
2029 | /* no checking possible for compile-time unknown format strings */ | |
2030 | } | |
2031 | ||
2032 | fileloc_free (formatloc); | |
2033 | } | |
2034 | ||
2035 | static void | |
2036 | checkExpressionDefinedAux (/*@notnull@*/ exprNode e1, | |
2037 | /*@notnull@*/ exprNode e2, | |
2038 | sRefSet sets1, | |
2039 | sRefSet sets2, | |
2040 | lltok op, | |
2041 | flagcode flag) | |
2042 | { | |
2043 | bool hadUncon = FALSE; | |
2044 | ||
2045 | if (sRef_isGlobal (sRef_getRootBase (e1->sref)) && | |
2046 | sRefSet_hasUnconstrained (sets2)) | |
2047 | { | |
2048 | voptgenerror | |
2049 | (FLG_EVALORDERUNCON, | |
2050 | message | |
2051 | ("Expression may have undefined behavior (%q used in right operand " | |
2052 | "may set global variable %q used in left operand): %s %s %s", | |
2053 | sRefSet_unparseUnconstrained (sets2), | |
2054 | sRef_unparse (sRef_getRootBase (e1->sref)), | |
2055 | exprNode_unparse (e1), lltok_unparse (op), exprNode_unparse (e2)), | |
2056 | e2->loc); | |
2057 | } | |
2058 | ||
2059 | if (sRef_isGlobal (sRef_getRootBase (e2->sref)) && | |
2060 | sRefSet_hasUnconstrained (sets1)) | |
2061 | { | |
2062 | voptgenerror | |
2063 | (FLG_EVALORDERUNCON, | |
2064 | message | |
2065 | ("Expression has undefined behavior (%q used in left operand " | |
2066 | "may set global variable %q used in right operand): %s %s %s", | |
2067 | sRefSet_unparseUnconstrained (sets1), | |
2068 | sRef_unparse (e2->sref), | |
2069 | exprNode_unparse (e1), lltok_unparse (op), exprNode_unparse (e2)), | |
2070 | e2->loc); | |
2071 | } | |
2072 | ||
2073 | sRefSet_realElements (e1->uses, sr) | |
2074 | { | |
2075 | if (sRef_isMeaningful (sr) && sRefSet_member (sets2, sr)) | |
2076 | { | |
2077 | voptgenerror | |
2078 | (FLG_EVALORDER, | |
2079 | message | |
2080 | ("Expression has undefined behavior (left operand uses %q, " | |
2081 | "modified by right operand): %s %s %s", | |
2082 | sRef_unparse (sr), | |
2083 | exprNode_unparse (e1), lltok_unparse (op), exprNode_unparse (e2)), | |
2084 | e2->loc); | |
2085 | } | |
2086 | } end_sRefSet_realElements; | |
2087 | ||
2088 | sRefSet_realElements (sets1, sr) | |
2089 | { | |
2090 | if (sRef_isMeaningful (sr)) | |
2091 | { | |
2092 | if (sRef_same (sr, e2->sref)) | |
2093 | { | |
2094 | voptgenerror | |
2095 | (flag, | |
2096 | message | |
2097 | ("Expression has undefined behavior (value of right operand " | |
2098 | "modified by left operand): %s %s %s", | |
2099 | exprNode_unparse (e1), lltok_unparse (op), exprNode_unparse (e2)), | |
2100 | e2->loc); | |
2101 | } | |
2102 | else if (sRefSet_member (e2->uses, sr)) | |
2103 | { | |
2104 | voptgenerror | |
2105 | (flag, | |
2106 | message | |
2107 | ("Expression has undefined behavior (left operand modifies %q, " | |
2108 | "used by right operand): %s %s %s", | |
2109 | sRef_unparse (sr), | |
2110 | exprNode_unparse (e1), lltok_unparse (op), exprNode_unparse (e2)), | |
2111 | e2->loc); | |
2112 | } | |
2113 | else | |
2114 | { | |
2115 | if (sRefSet_member (sets2, sr)) | |
2116 | { | |
2117 | if (sRef_isUnconstrained (sr)) | |
2118 | { | |
2119 | if (hadUncon) | |
2120 | { | |
2121 | ; | |
2122 | } | |
2123 | else | |
2124 | { | |
2125 | hadUncon = optgenerror | |
2126 | (FLG_EVALORDERUNCON, | |
2127 | message | |
2128 | ("Expression may have undefined behavior. Left operand " | |
2129 | "calls %q; right operand calls %q. The unconstrained " | |
2130 | "functions may modify global state used by " | |
2131 | "the other operand): %s %s %s", | |
2132 | sRefSet_unparseUnconstrained (sets1), | |
2133 | sRefSet_unparseUnconstrained (sets2), | |
2134 | exprNode_unparse (e1), lltok_unparse (op), | |
2135 | exprNode_unparse (e2)), | |
2136 | e2->loc); | |
2137 | } | |
2138 | } | |
2139 | else | |
2140 | { | |
2141 | voptgenerror | |
2142 | (flag, | |
2143 | message | |
2144 | ("Expression has undefined behavior (both " | |
2145 | "operands modify %q): %s %s %s", | |
2146 | sRef_unparse (sr), | |
2147 | exprNode_unparse (e1), | |
2148 | lltok_unparse (op), exprNode_unparse (e2)), | |
2149 | e2->loc); | |
2150 | } | |
2151 | } | |
2152 | } | |
2153 | } | |
2154 | } end_sRefSet_realElements; | |
2155 | } | |
2156 | ||
2157 | static void checkExpressionDefined (exprNode e1, exprNode e2, lltok op) | |
2158 | { | |
2159 | bool hasError = FALSE; | |
2160 | ||
2161 | if (exprNode_isError (e1) || exprNode_isError (e2)) | |
2162 | { | |
2163 | return; | |
2164 | } | |
2165 | ||
2166 | if (sRefSet_member (e2->sets, e1->sref)) | |
2167 | { | |
2168 | if (e2->kind == XPR_CALL) | |
2169 | { | |
2170 | ; | |
2171 | } | |
2172 | else | |
2173 | { | |
2174 | hasError = optgenerror | |
2175 | (FLG_EVALORDER, | |
2176 | message ("Expression has undefined behavior " | |
2177 | "(value of left operand is modified " | |
2178 | "by right operand): %s %s %s", | |
2179 | exprNode_unparse (e1), lltok_unparse (op), | |
2180 | exprNode_unparse (e2)), | |
2181 | e2->loc); | |
2182 | } | |
2183 | } | |
2184 | ||
2185 | if (context_getFlag (FLG_EVALORDERUNCON)) | |
2186 | { | |
2187 | if (sRefSet_member (e2->msets, e1->sref)) | |
2188 | { | |
2189 | if (e2->kind == XPR_CALL) | |
2190 | { | |
2191 | ; | |
2192 | } | |
2193 | else | |
2194 | { | |
2195 | hasError = optgenerror | |
2196 | (FLG_EVALORDER, | |
2197 | message | |
2198 | ("Expression has undefined behavior (value of left " | |
2199 | "operand may be modified by right operand): %s %s %s", | |
2200 | exprNode_unparse (e1), lltok_unparse (op), | |
2201 | exprNode_unparse (e2)), | |
2202 | e2->loc); | |
2203 | } | |
2204 | } | |
2205 | } | |
2206 | ||
2207 | if (!hasError) | |
2208 | { | |
2209 | checkExpressionDefinedAux (e1, e2, e1->sets, e2->sets, op, FLG_EVALORDER); | |
2210 | ||
2211 | if (context_maybeSet (FLG_EVALORDERUNCON)) | |
2212 | { | |
2213 | checkExpressionDefinedAux (e1, e2, e1->msets, | |
2214 | e2->msets, op, FLG_EVALORDERUNCON); | |
2215 | } | |
2216 | } | |
2217 | } | |
2218 | ||
2219 | static void checkSequencing (exprNode p_f, exprNodeList p_args); | |
2220 | ||
2221 | static int | |
2222 | checkArgsReal (uentry fcn, /*@dependent@*/ exprNode f, uentryList cl, | |
2223 | exprNodeList args, bool isIter, exprNode ret) | |
2224 | { | |
2225 | int special = 0; | |
2226 | ||
2227 | if (!exprNode_isError (f)) | |
2228 | { | |
2229 | if (!uentryList_isMissingParams (cl)) | |
2230 | { | |
2231 | int nargs = exprNodeList_size (args); | |
2232 | int expectargs = uentryList_size (cl); | |
2233 | ctype last; | |
2234 | int i = 0; | |
2235 | ||
2236 | if (expectargs == 0) | |
2237 | { | |
2238 | if (nargs != 0) | |
2239 | { | |
2240 | if (isIter) | |
2241 | { | |
2242 | voptgenerror | |
2243 | (FLG_TYPE, | |
2244 | message ("Iter %q invoked with %d args, " | |
2245 | "declared void", | |
2246 | uentry_getName (fcn), | |
2247 | nargs), | |
2248 | f->loc); | |
2249 | } | |
2250 | else | |
2251 | { | |
2252 | voptgenerror | |
2253 | (FLG_TYPE, | |
2254 | message ("Function %s called with %d args, " | |
2255 | "declared void", | |
2256 | exprNode_unparse (f), nargs), | |
2257 | f->loc); | |
2258 | } | |
2259 | } | |
2260 | return special; | |
2261 | } | |
2262 | ||
2263 | last = uentry_getType (uentryList_getN (cl, expectargs - 1)); | |
2264 | ||
2265 | exprNodeList_reset (args); | |
2266 | ||
2267 | uentryList_elements (cl, current) | |
2268 | { | |
2269 | ctype ct = uentry_getType (current); | |
2270 | exprNode a; | |
2271 | ||
2272 | if (ctype_isElips (ct)) | |
2273 | { | |
2274 | /* | |
2275 | ** do special checking for printf/scanf library functions | |
2276 | ** | |
2277 | ** this is kludgey code, just for handling the special case | |
2278 | ** | |
2279 | */ | |
2280 | ||
2281 | if (uentry_isPrintfLike (fcn)) | |
2282 | { | |
2283 | checkPrintfArgs (f, fcn, args, ret, i); | |
2284 | special = i; | |
2285 | } | |
2286 | else if (uentry_isScanfLike (fcn)) | |
2287 | { | |
2288 | checkScanfArgs (f, fcn, args, ret, i); | |
2289 | special = i; | |
2290 | } | |
2291 | else if (uentry_isMessageLike (fcn)) | |
2292 | { | |
2293 | checkMessageArgs (f, fcn, args, i); | |
2294 | special = i; | |
2295 | } | |
2296 | else | |
2297 | { | |
2298 | llassert (!uentry_isSpecialFunction (fcn)); | |
2299 | } | |
2300 | ||
2301 | nargs = expectargs; /* avoid errors */ | |
2302 | break; | |
2303 | } | |
2304 | else | |
2305 | { | |
2306 | if (i >= nargs) break; | |
2307 | ||
2308 | a = exprNodeList_current (args); | |
2309 | exprNodeList_advance (args); | |
2310 | ||
2311 | i++; | |
2312 | ||
2313 | if (exprNode_isError (a)) | |
2314 | { | |
2315 | ; | |
2316 | } | |
2317 | else | |
2318 | { | |
2319 | /* | |
2320 | probably necessary? I'm not sure about this one | |
2321 | checkMacroParen (a); | |
2322 | */ | |
2323 | ||
2324 | f->guards = guardSet_union (f->guards, a->guards); | |
2325 | ||
2326 | DPRINTF (("match arg: %s / %s", ctype_unparse (ct), ctype_unparse (a->typ))); | |
2327 | ||
2328 | if (!(exprNode_matchArgType (ct, a))) | |
2329 | { | |
2330 | DPRINTF (("Args mismatch!")); | |
2331 | ||
2332 | if (ctype_isVoidPointer (ct) | |
2333 | && (ctype_isPointer (a->typ) | |
2334 | && (ctype_isRealAbstract (ctype_baseArrayPtr (a->typ))))) | |
2335 | { | |
2336 | vnoptgenerror | |
2337 | (FLG_ABSTVOIDP, | |
2338 | message | |
2339 | ("Pointer to abstract type (%t) used " | |
2340 | "as void pointer " | |
2341 | "(arg %d to %q): %s", | |
2342 | a->typ, i, | |
2343 | uentry_getName (fcn), | |
2344 | exprNode_unparse (a)), | |
2345 | a->loc); | |
2346 | } | |
2347 | else | |
2348 | { | |
2349 | if (isIter) | |
2350 | { | |
2351 | (void) gentypeerror | |
2352 | (ct, exprNode_undefined, | |
2353 | a->typ, a, | |
2354 | message | |
2355 | ("Iter %q expects arg %d to " | |
2356 | "be %t gets %t: %s", | |
2357 | uentry_getName (fcn), | |
2358 | i, ct, a->typ, exprNode_unparse (a)), | |
2359 | a->loc); | |
2360 | } | |
2361 | else | |
2362 | { | |
2363 | if (gentypeerror | |
2364 | (ct, | |
2365 | exprNode_undefined, | |
2366 | a->typ, | |
2367 | a, | |
2368 | message | |
2369 | ("Function %q expects arg %d to be %t gets %t: %s", | |
2370 | uentry_getName (fcn), | |
2371 | i, ct, a->typ, exprNode_unparse (a)), | |
2372 | a->loc)) | |
2373 | { | |
2374 | DPRINTF (("Types: %s / %s", | |
2375 | ctype_unparse (ct), | |
2376 | ctype_unparse (a->typ))); | |
2377 | } | |
2378 | ||
2379 | /* | |
2380 | ** Clear null marker for abstract types. | |
2381 | ** (It is not revealed, so suppress future messages.) | |
2382 | */ | |
2383 | ||
2384 | if (ctype_isAbstract (a->typ)) | |
2385 | { | |
2386 | sRef_setNullUnknown (exprNode_getSref (a), a->loc); | |
2387 | } | |
2388 | } | |
2389 | } | |
2390 | } | |
2391 | } | |
2392 | } | |
2393 | } end_uentryList_elements ; | |
2394 | ||
2395 | ||
2396 | if (expectargs != nargs) /* note: not != since we may have ... */ | |
2397 | { | |
2398 | if (ctype_isElips (last)) | |
2399 | { | |
2400 | voptgenerror | |
2401 | (FLG_TYPE, | |
2402 | message ("Function %s called with %d args, expects at least %d", | |
2403 | exprNode_unparse (f), | |
2404 | nargs, expectargs - 1), | |
2405 | f->loc); | |
2406 | } | |
2407 | else | |
2408 | { | |
2409 | if (isIter) | |
2410 | { | |
2411 | voptgenerror | |
2412 | (FLG_TYPE, | |
2413 | message ("Iter %q invoked with %d args, expects %d", | |
2414 | uentry_getName (fcn), nargs, expectargs), | |
2415 | f->loc); | |
2416 | } | |
2417 | else | |
2418 | { | |
2419 | voptgenerror | |
2420 | (FLG_TYPE, | |
2421 | message ("Function %s called with %d args, expects %d", | |
2422 | exprNode_unparse (f), | |
2423 | nargs, expectargs), | |
2424 | f->loc); | |
2425 | } | |
2426 | } | |
2427 | } | |
2428 | } | |
2429 | } | |
2430 | ||
2431 | return special; | |
2432 | } | |
2433 | ||
2434 | /* | |
2435 | ** Check for undefined code sequences in function arguments: | |
2436 | ** | |
2437 | ** one parameter sets something used by another parameter | |
2438 | ** one parameter sets something set by another parameter | |
2439 | */ | |
2440 | ||
2441 | static void | |
2442 | checkSequencingOne (exprNode f, exprNodeList args, | |
2443 | /*@notnull@*/ exprNode el, int argno) | |
2444 | { | |
2445 | /* | |
2446 | ** Do second loop, iff +undefunspec | |
2447 | */ | |
2448 | ||
2449 | int checkloop; | |
2450 | int numloops = context_maybeSet (FLG_EVALORDERUNCON) ? 2 : 1; | |
2451 | ||
2452 | for (checkloop = 0; checkloop < numloops; checkloop++) | |
2453 | { | |
2454 | sRefSet thissets; | |
2455 | ||
2456 | if (checkloop == 0) | |
2457 | { | |
2458 | thissets = el->sets; | |
2459 | } | |
2460 | else | |
2461 | { | |
2462 | llassert (checkloop == 1); | |
2463 | thissets = el->msets; | |
2464 | } | |
2465 | ||
2466 | sRefSet_realElements (thissets, thisset) | |
2467 | { | |
2468 | int j; | |
2469 | ||
2470 | /*@access exprNodeList@*/ | |
2471 | for (j = 0; j < args->nelements; j++) | |
2472 | { | |
2473 | exprNode jl = args->elements[j]; | |
2474 | int thisargno = j + 1; | |
2475 | ||
2476 | if (thisargno != argno && exprNode_isDefined (jl)) | |
2477 | { | |
2478 | sRefSet otheruses = jl->uses; | |
2479 | ||
2480 | if (sRef_isGlobal (sRef_getRootBase (jl->sref)) && | |
2481 | sRefSet_hasUnconstrained (thissets)) | |
2482 | { | |
2483 | voptgenerror | |
2484 | (FLG_EVALORDERUNCON, | |
2485 | /*@-sefparams@*/ | |
2486 | message | |
2487 | ("%q used in argument %d may set " | |
2488 | "global variable %q used by argument %d: %s(%q)", | |
2489 | cstring_capitalizeFree (sRefSet_unparseUnconstrained (thissets)), | |
2490 | /*@=sefparams@*/ | |
2491 | argno, | |
2492 | sRef_unparse (sRef_getRootBase (jl->sref)), | |
2493 | thisargno, | |
2494 | exprNode_unparse (f), exprNodeList_unparse (args)), | |
2495 | el->loc); | |
2496 | } | |
2497 | ||
2498 | if (sRefSet_member (otheruses, thisset)) | |
2499 | { | |
2500 | if (sRef_isUnconstrained (thisset)) | |
2501 | { | |
2502 | voptgenerror | |
2503 | (FLG_EVALORDERUNCON, | |
2504 | message | |
2505 | ("Unconstrained functions used in arguments %d (%q) " | |
2506 | "and %d (%s) may modify " | |
2507 | "or use global state in undefined way: %s(%q)", | |
2508 | argno, | |
2509 | sRefSet_unparseUnconstrainedPlain (otheruses), | |
2510 | thisargno, | |
2511 | sRef_unconstrainedName (thisset), | |
2512 | exprNode_unparse (f), | |
2513 | exprNodeList_unparse (args)), | |
2514 | el->loc); | |
2515 | } | |
2516 | else | |
2517 | { | |
2518 | voptgenerror | |
2519 | (FLG_EVALORDER, | |
2520 | message | |
2521 | ("Argument %d modifies %q, used by argument %d " | |
2522 | "(order of evaluation of actual parameters is " | |
2523 | "undefined): %s(%q)", | |
2524 | argno, sRef_unparse (thisset), thisargno, | |
2525 | exprNode_unparse (f), exprNodeList_unparse (args)), | |
2526 | el->loc); | |
2527 | } | |
2528 | } | |
2529 | else | |
2530 | { | |
2531 | sRefSet othersets = jl->sets; | |
2532 | ||
2533 | if (sRefSet_member (othersets, thisset)) | |
2534 | { | |
2535 | if (sRef_isUnconstrained (thisset)) | |
2536 | { | |
2537 | voptgenerror | |
2538 | (FLG_EVALORDERUNCON, | |
2539 | message | |
2540 | ("Unconstrained functions used in " | |
2541 | "arguments %d (%q) and %d (%s) may modify " | |
2542 | "or use global state in undefined way: %s(%q)", | |
2543 | argno, | |
2544 | sRefSet_unparseUnconstrainedPlain (othersets), | |
2545 | thisargno, | |
2546 | sRef_unconstrainedName (thisset), | |
2547 | exprNode_unparse (f), exprNodeList_unparse (args)), | |
2548 | el->loc); | |
2549 | } | |
2550 | else | |
2551 | { | |
2552 | voptgenerror | |
2553 | (FLG_EVALORDER, | |
2554 | message | |
2555 | ("Argument %d modifies %q, set by argument %d (order of" | |
2556 | " evaluation of actual parameters is undefined): %s(%q)", | |
2557 | argno, sRef_unparse (thisset), thisargno, | |
2558 | exprNode_unparse (f), exprNodeList_unparse (args)), | |
2559 | el->loc); | |
2560 | } | |
2561 | } | |
2562 | } | |
2563 | } | |
2564 | } | |
2565 | /*@noaccess exprNodeList@*/ | |
2566 | } end_sRefSet_realElements; | |
2567 | } | |
2568 | } | |
2569 | ||
2570 | static void | |
2571 | checkSequencing (exprNode f, exprNodeList args) | |
2572 | { | |
2573 | if (exprNodeList_size (args) > 1) | |
2574 | { | |
2575 | int i; | |
2576 | exprNode el; | |
2577 | ||
2578 | /*@access exprNodeList*/ | |
2579 | ||
2580 | for (i = 0; i < args->nelements; i++) | |
2581 | { | |
2582 | el = args->elements[i]; | |
2583 | ||
2584 | if (!exprNode_isError (el)) | |
2585 | { | |
2586 | checkSequencingOne (f, args, el, i + 1); | |
2587 | } | |
2588 | } | |
2589 | /*@noaccess exprNodeList*/ | |
2590 | } | |
2591 | } | |
2592 | ||
2593 | /* | |
2594 | ** requires le = exprNode_getUentry (f) | |
2595 | */ | |
2596 | ||
2597 | static void | |
2598 | checkGlobMods (/*@notnull@*/ /*@dependent@*/ exprNode f, | |
2599 | uentry le, exprNodeList args, | |
2600 | /*@notnull@*/ exprNode ret, int specialArgs) | |
2601 | { | |
2602 | bool isSpec = FALSE; | |
2603 | bool hasMods = FALSE; | |
2604 | cstring fname; | |
2605 | globSet usesGlobs = globSet_undefined; | |
2606 | sRefSet mods = sRefSet_undefined; | |
2607 | bool freshMods = FALSE; | |
2608 | uentryList params = uentryList_undefined; | |
2609 | ||
2610 | /* | |
2611 | ** check globals and modifies | |
2612 | */ | |
2613 | ||
2614 | setCodePoint (); | |
2615 | ||
2616 | if (!uentry_isValid (le)) | |
2617 | { | |
2618 | ctype fr = ctype_realType (f->typ); | |
2619 | ||
2620 | if (ctype_isFunction (fr)) | |
2621 | { | |
2622 | params = ctype_argsFunction (fr); | |
2623 | } | |
2624 | else | |
2625 | { | |
2626 | params = uentryList_missingParams; | |
2627 | } | |
2628 | ||
2629 | if (!context_getFlag (FLG_MODNOMODS) | |
2630 | && !context_getFlag (FLG_GLOBUNSPEC)) | |
2631 | { | |
2632 | checkUnspecCall (f, params, args); | |
2633 | } | |
2634 | ||
2635 | return; | |
2636 | } | |
2637 | ||
2638 | fname = uentry_rawName (le); | |
2639 | ||
2640 | setCodePoint (); | |
2641 | ||
2642 | if (uentry_isFunction (le)) | |
2643 | { | |
2644 | params = uentry_getParams (le); | |
2645 | mods = uentry_getMods (le); | |
2646 | hasMods = uentry_hasMods (le); | |
2647 | usesGlobs = uentry_getGlobs (le); | |
2648 | isSpec = uentry_isSpecified (le); | |
2649 | } | |
2650 | else /* not a function */ | |
2651 | { | |
2652 | ctype ct = ctype_realType (uentry_getType (le)); | |
2653 | ||
2654 | llassertprint (uentry_isVar (le) && ctype_isFunction (ct), | |
2655 | ("checkModGlobs: uentry not a function: %s", | |
2656 | uentry_unparse (le))); | |
2657 | ||
2658 | params = ctype_argsFunction (ct); | |
2659 | } | |
2660 | ||
2661 | /* | |
2662 | ** check globals | |
2663 | */ | |
2664 | ||
2665 | setCodePoint (); | |
2666 | ||
2667 | ||
2668 | globSet_allElements (usesGlobs, el) | |
2669 | { | |
2670 | if (sRef_isValid (el)) | |
2671 | { | |
2672 | if (sRef_isInternalState (el) || sRef_isSystemState (el)) | |
2673 | { | |
2674 | context_usedGlobal (el); | |
2675 | exprNode_checkUse (f, el, f->loc); | |
2676 | ||
2677 | if (context_checkInternalUse ()) | |
2678 | { | |
2679 | if (!context_globAccess (el)) | |
2680 | { | |
2681 | if (sRef_isSystemState (el) | |
2682 | && !context_getFlag (FLG_MODFILESYSTEM)) | |
2683 | { | |
2684 | ; | |
2685 | } | |
2686 | else | |
2687 | { | |
2688 | voptgenerror | |
2689 | (FLG_INTERNALGLOBS, | |
2690 | message | |
2691 | ("Called procedure %s may access %q, but " | |
2692 | "globals list does not include globals %s", | |
2693 | exprNode_unparse (f), | |
2694 | sRef_unparse (el), | |
2695 | cstring_makeLiteralTemp (sRef_isInternalState (el) | |
2696 | ? "internalState" | |
2697 | : "fileSystem")), | |
2698 | f->loc); | |
2699 | } | |
2700 | } | |
2701 | } | |
2702 | } | |
2703 | else if (sRef_isNothing (el) || sRef_isSpecState (el)) | |
2704 | { | |
2705 | ; | |
2706 | } | |
2707 | else | |
2708 | { | |
2709 | uentry gle = sRef_getUentry (el); | |
2710 | sRef sr = sRef_updateSref (el); | |
2711 | ||
2712 | if (sRef_isUndefGlob (el)) | |
2713 | { | |
2714 | sRef_setDefined (sr, f->loc); | |
2715 | exprNode_checkSet (f, sr); | |
2716 | } | |
2717 | else | |
2718 | { | |
2719 | /* | |
2720 | ** check definition | |
2721 | */ | |
2722 | ||
2723 | if (sRef_isAllocated (el)) | |
2724 | { | |
2725 | exprNode_checkSet (f, sr); | |
2726 | } | |
2727 | else | |
2728 | { | |
2729 | if (sRef_isStateUndefined (sr)) | |
2730 | { | |
2731 | voptgenerror | |
2732 | (FLG_GLOBSTATE, | |
2733 | message | |
2734 | ("%s %q used by function undefined before call: %s", | |
2735 | sRef_getScopeName (sr), | |
2736 | sRef_unparse (sr), | |
2737 | exprNode_unparse (f)), | |
2738 | f->loc); | |
2739 | sRef_setDefined (sr, f->loc); | |
2740 | } | |
2741 | exprNode_checkUse (f, sr, f->loc); | |
2742 | } | |
2743 | ||
2744 | checkGlobUse (gle, TRUE, f); | |
2745 | } | |
2746 | ||
2747 | if (sRef_isKilledGlob (el)) | |
2748 | { | |
2749 | sRef_kill (sr, f->loc); | |
2750 | context_usedGlobal (sr); | |
2751 | } | |
2752 | } | |
2753 | } | |
2754 | } end_globSet_allElements; | |
2755 | ||
2756 | /* | |
2757 | ** check modifies | |
2758 | */ | |
2759 | ||
2760 | if (context_hasMods () || context_getFlag (FLG_MODNOMODS)) | |
2761 | { | |
2762 | sRefSet smods = sRefSet_undefined; | |
2763 | ||
2764 | /* | |
2765 | ** NEED to check for modifies anything | |
2766 | */ | |
2767 | ||
2768 | /* | |
2769 | ** check each sRef that called function modifies (ml), is | |
2770 | ** modifiable by tl | |
2771 | */ | |
2772 | ||
2773 | setCodePoint (); | |
2774 | ||
2775 | sRefSet_allElements (mods, s) /* s is something which may be modified */ | |
2776 | { | |
2777 | if (sRef_isKindSpecial (s)) | |
2778 | { | |
2779 | if (sRef_isSpecInternalState (s)) | |
2780 | { | |
2781 | if (context_getFlag (FLG_MODINTERNALSTRICT)) | |
2782 | { | |
2783 | exprNode_checkCallModifyVal (s, args, f, ret); | |
2784 | } | |
2785 | else | |
2786 | { | |
2787 | sRefSet mmods = context_modList (); | |
2788 | ||
2789 | sRefSet_allElements (mmods, el) | |
2790 | { | |
2791 | if (sRef_isInternalState (el)) | |
2792 | { | |
2793 | sRef_setModified (el); | |
2794 | } | |
2795 | } end_sRefSet_allElements ; | |
2796 | } | |
2797 | } | |
2798 | else | |
2799 | { | |
2800 | exprNode_checkCallModifyVal (s, args, f, ret); | |
2801 | } | |
2802 | } | |
2803 | else | |
2804 | { | |
2805 | sRef rb = sRef_getRootBase (s); | |
2806 | ||
2807 | if (sRef_isGlobal (rb)) | |
2808 | { | |
2809 | context_usedGlobal (rb); | |
2810 | } | |
2811 | ||
2812 | if (sRef_isFileStatic (s) | |
2813 | && !fileId_equal (fileloc_fileId (f->loc), | |
2814 | fileloc_fileId (uentry_whereDefined (le)))) | |
2815 | { | |
2816 | smods = sRefSet_insert (smods, s); | |
2817 | } | |
2818 | else | |
2819 | { | |
2820 | exprNode_checkCallModifyVal (s, args, f, ret); | |
2821 | } | |
2822 | } | |
2823 | } end_sRefSet_allElements; | |
2824 | ||
2825 | setCodePoint (); | |
2826 | ||
2827 | /* | |
2828 | ** Static elements in modifies set can have nasty consequences. | |
2829 | ** (I think...have not been able to reproduce a possible bug.) | |
2830 | */ | |
2831 | ||
2832 | if (!sRefSet_isDefined (smods)) | |
2833 | { | |
2834 | mods = sRefSet_newCopy (mods); | |
2835 | freshMods = TRUE; | |
2836 | ||
2837 | sRefSet_allElements (smods, el) | |
2838 | { | |
2839 | bool res = sRefSet_delete (mods, el); | |
2840 | ||
2841 | llassert (res); | |
2842 | } end_sRefSet_allElements; | |
2843 | ||
2844 | sRefSet_free (smods); | |
2845 | /*@-branchstate@*/ | |
2846 | } | |
2847 | /*@=branchstate@*/ | |
2848 | } | |
2849 | else if (sRefSet_isDefined (mods)) | |
2850 | { /* just check observers */ | |
2851 | setCodePoint (); | |
2852 | ||
2853 | sRefSet_allElements (mods, s) /* s is something which may be modified */ | |
2854 | { | |
2855 | sRef rb = sRef_getRootBase (s); | |
2856 | ||
2857 | setCodePoint (); | |
2858 | ||
2859 | if (sRef_isParam (rb)) | |
2860 | { | |
2861 | sRef b = sRef_fixBaseParam (s, args); | |
2862 | ||
2863 | if (sRef_isObserver (b)) | |
2864 | { | |
2865 | exprNode e = exprNodeList_nth (args, sRef_getParam (rb)); | |
2866 | ||
2867 | if (optgenerror | |
2868 | (FLG_MODOBSERVER, | |
2869 | message ("Function call may modify observer%q: %s", | |
2870 | sRef_unparsePreOpt (b), exprNode_unparse (e)), | |
2871 | exprNode_loc (e))) | |
2872 | { | |
2873 | sRef_showExpInfo (b); | |
2874 | } | |
2875 | } | |
2876 | } | |
2877 | } end_sRefSet_allElements; | |
2878 | } | |
2879 | else | |
2880 | { | |
2881 | if (!hasMods) /* no specified modifications */ | |
2882 | { | |
2883 | if (context_getFlag (FLG_MODOBSERVERUNCON)) | |
2884 | { | |
2885 | exprNodeList_elements (args, e) | |
2886 | { | |
2887 | if (exprNode_isDefined (e)) | |
2888 | { | |
2889 | sRef s = exprNode_getSref (e); | |
2890 | ||
2891 | if (sRef_isObserver (s) | |
2892 | && ctype_isMutable (sRef_getType (s))) | |
2893 | { | |
2894 | if (optgenerror | |
2895 | (FLG_MODOBSERVERUNCON, | |
2896 | message | |
2897 | ("Call to unconstrained function %s may modify observer%q: %s", | |
2898 | exprNode_unparse (f), | |
2899 | sRef_unparsePreOpt (s), exprNode_unparse (e)), | |
2900 | exprNode_loc (e))) | |
2901 | { | |
2902 | sRef_showExpInfo (s); | |
2903 | } | |
2904 | } | |
2905 | } | |
2906 | } end_exprNodeList_elements; | |
2907 | } | |
2908 | } | |
2909 | } | |
2910 | ||
2911 | checkAnyCall (f, fname, params, args, hasMods, mods, isSpec, specialArgs); | |
2912 | ||
2913 | ret->uses = sRefSet_union (ret->uses, f->uses); | |
2914 | ret->sets = sRefSet_union (ret->sets, f->sets); | |
2915 | ret->msets = sRefSet_union (ret->msets, f->msets); | |
2916 | ||
2917 | if (freshMods) | |
2918 | { | |
2919 | /* | |
2920 | ** Spurious errors reported, because lclint can't tell | |
2921 | ** mods must be fresh if freshMods is true. | |
2922 | */ | |
2923 | ||
2924 | /*@i@*/ sRefSet_free (mods); | |
2925 | } | |
2926 | ||
2927 | setCodePoint (); | |
2928 | } | |
2929 | ||
2930 | void checkGlobUse (uentry glob, bool isCall, /*@notnull@*/ exprNode e) | |
2931 | { | |
2932 | if (uentry_isVar (glob)) | |
2933 | { | |
2934 | if (context_inFunctionLike ()) | |
2935 | { | |
2936 | sRef sr = uentry_getSref (glob); | |
2937 | ||
2938 | context_usedGlobal (sr); | |
2939 | ||
2940 | if (context_checkGlobUse (glob)) | |
2941 | { | |
2942 | if (!context_globAccess (sr)) | |
2943 | { | |
2944 | if (isCall) | |
2945 | { | |
2946 | voptgenerror | |
2947 | (FLG_GLOBALS, | |
2948 | message ("Called procedure %s may access %s %q", | |
2949 | exprNode_unparse (e), | |
2950 | sRef_unparseScope (sr), | |
2951 | uentry_getName (glob)), | |
2952 | e->loc); | |
2953 | } | |
2954 | else | |
2955 | { | |
2956 | voptgenerror | |
2957 | (FLG_GLOBALS, | |
2958 | message ("Undocumented use of %s %s", | |
2959 | sRef_unparseScope (sr), | |
2960 | exprNode_unparse (e)), | |
2961 | e->loc); | |
2962 | } | |
2963 | } | |
2964 | } | |
2965 | } | |
2966 | } | |
2967 | else | |
2968 | { | |
2969 | llbug (message ("Global not variable: %q", uentry_unparse (glob))); | |
2970 | } | |
2971 | } | |
2972 | ||
2973 | static /*@only@*/ exprNode | |
2974 | functionCallSafe (/*@only@*/ /*@notnull@*/ exprNode f, | |
2975 | ctype t, /*@keep@*/ exprNodeList args) | |
2976 | { | |
2977 | /* requires f is a non-error exprNode, with type function */ | |
2978 | cstring fname = exprNode_unparse (f); | |
2979 | uentry le = exprNode_getUentry (f); | |
2980 | exprNode ret = exprNode_createPartialCopy (f); | |
2981 | int special; | |
2982 | ||
2983 | setCodePoint (); | |
2984 | ||
2985 | ret->typ = ctype_returnValue (t); | |
2986 | ret->kind = XPR_CALL; | |
2987 | ||
2988 | ret->edata = exprData_makeCall (f, args); | |
2989 | ||
2990 | /* | |
2991 | ** Order of these steps is very important! | |
2992 | ** | |
2993 | ** Must check for argument dependencies before messing up uses and sets. | |
2994 | */ | |
2995 | ||
2996 | if (context_getFlag (FLG_EVALORDER)) | |
2997 | { | |
2998 | exprNodeList_elements (args, current) | |
2999 | { | |
3000 | if (exprNode_isDefined (current)) | |
3001 | { | |
3002 | exprNode_addUse (current, current->sref); | |
3003 | } | |
3004 | } end_exprNodeList_elements; | |
3005 | ||
3006 | if (context_maybeSet (FLG_EVALORDER) || context_maybeSet (FLG_EVALORDERUNCON)) | |
3007 | { | |
3008 | checkSequencing (f, args); | |
3009 | } | |
3010 | ||
3011 | exprNodeList_elements (args, current) | |
3012 | { | |
3013 | if (exprNode_isDefined (current) && sRef_isMeaningful (current->sref)) | |
3014 | { | |
3015 | exprNode_addUse (ret, sRef_makeDerived (current->sref)); | |
3016 | } | |
3017 | } end_exprNodeList_elements ; | |
3018 | } | |
3019 | ||
3020 | special = checkArgs (le, f, t, args, ret); | |
3021 | checkGlobMods (f, le, args, ret, special); | |
3022 | ||
3023 | setCodePoint (); | |
3024 | ||
3025 | if (uentry_isValid (le) | |
3026 | && (uentry_isFunction (le) | |
3027 | || (uentry_isVariable (le) | |
3028 | && ctype_isFunction (uentry_getType (le))))) | |
3029 | { | |
3030 | exitkind exk = uentry_getExitCode (le); | |
3031 | ||
3032 | /* f->typ is already set to the return type */ | |
3033 | ||
3034 | ret->sref = uentry_returnedRef (le, args); | |
3035 | ||
3036 | if (uentry_isFunction (le) && exprNodeList_size (args) >= 1) | |
3037 | { | |
3038 | qual nullPred = uentry_nullPred (le); | |
3039 | ||
3040 | if (qual_isTrueNull (nullPred)) | |
3041 | { | |
3042 | exprNode arg = exprNodeList_head (args); | |
3043 | ||
3044 | if (exprNode_isDefined (arg)) | |
3045 | { | |
3046 | ret->guards = guardSet_addFalseGuard (ret->guards, arg->sref); | |
3047 | } | |
3048 | } | |
3049 | else if (qual_isFalseNull (nullPred)) | |
3050 | { | |
3051 | exprNode arg = exprNodeList_head (args); | |
3052 | ||
3053 | if (exprNode_isDefined (arg)) | |
3054 | { | |
3055 | ret->guards = guardSet_addTrueGuard (ret->guards, arg->sref); | |
3056 | } | |
3057 | } | |
3058 | else | |
3059 | { | |
3060 | llassert (qual_isUnknown (nullPred)); | |
3061 | } | |
3062 | } | |
3063 | ||
3064 | if (exitkind_isConditionalExit (exk)) | |
3065 | { | |
3066 | /* | |
3067 | ** True exit is: | |
3068 | ** if (arg0) then { exit! } else { ; } | |
3069 | ** False exit is: | |
3070 | ** if (arg0) then { ; } else { exit! } | |
3071 | */ | |
3072 | ||
3073 | exprNode firstArg; | |
3074 | ||
3075 | llassert (!exprNodeList_isEmpty (args)); | |
3076 | firstArg = exprNodeList_head (args); | |
3077 | ||
3078 | if (exprNode_isDefined (firstArg) | |
3079 | && !guardSet_isEmpty (firstArg->guards)) | |
3080 | { | |
3081 | usymtab_trueBranch (guardSet_undefined); | |
3082 | usymtab_altBranch (guardSet_undefined); | |
3083 | ||
3084 | if (exitkind_isTrueExit (exk)) | |
3085 | { | |
3086 | usymtab_popBranches (firstArg, | |
3087 | exprNode_makeMustExit (), | |
3088 | exprNode_undefined, | |
3089 | TRUE, TRUEEXITCLAUSE); | |
3090 | } | |
3091 | else | |
3092 | { | |
3093 | usymtab_popBranches (firstArg, | |
3094 | exprNode_undefined, | |
3095 | exprNode_makeMustExit (), | |
3096 | TRUE, FALSEEXITCLAUSE); | |
3097 | } | |
3098 | } | |
3099 | ||
3100 | ret->exitCode = XK_MAYEXIT; | |
3101 | } | |
3102 | else if (exitkind_mustExit (exk)) | |
3103 | { | |
3104 | ret->exitCode = XK_MUSTEXIT; | |
3105 | } | |
3106 | else if (exitkind_couldExit (exk)) | |
3107 | { | |
3108 | ret->exitCode = XK_MAYEXIT; | |
3109 | } | |
3110 | else | |
3111 | { | |
3112 | ; | |
3113 | } | |
3114 | ||
3115 | if (cstring_equalLit (fname, "exit")) | |
3116 | { | |
3117 | if (exprNodeList_size (args) == 1) | |
3118 | { | |
3119 | exprNode arg = exprNodeList_head (args); | |
3120 | ||
3121 | if (exprNode_isDefined (arg) && exprNode_knownIntValue (arg)) | |
3122 | { | |
3123 | long int val = multiVal_forceInt (exprNode_getValue (arg)); | |
3124 | ||
3125 | if (val != 0) | |
3126 | { | |
3127 | voptgenerror | |
3128 | (FLG_EXITARG, | |
3129 | message | |
3130 | ("Argument to exit has implementation defined behavior: %s", | |
3131 | exprNode_unparse (arg)), | |
3132 | exprNode_loc (arg)); | |
3133 | } | |
3134 | } | |
3135 | } | |
3136 | } | |
3137 | } | |
3138 | else | |
3139 | { | |
3140 | ret->sref = defref; | |
3141 | exprNode_checkSetAny (ret, uentry_rawName (le)); | |
3142 | } | |
3143 | ||
3144 | return (ret); | |
3145 | } | |
3146 | ||
3147 | /* | |
3148 | ** this is yucky! should keep the uentry as part of exprNode! | |
3149 | */ | |
3150 | ||
3151 | /*@observer@*/ uentry | |
3152 | exprNode_getUentry (exprNode e) | |
3153 | { | |
3154 | if (exprNode_isError (e)) | |
3155 | { | |
3156 | return uentry_undefined; | |
3157 | } | |
3158 | else | |
3159 | { | |
3160 | cstring s = exprNode_rootVarName (e); | |
3161 | uentry ue = usymtab_lookupSafe (s); | |
3162 | ||
3163 | return ue; | |
3164 | } | |
3165 | } | |
3166 | ||
3167 | exprNode | |
3168 | exprNode_makeInitBlock (lltok brace, /*@only@*/ exprNodeList inits) | |
3169 | { | |
3170 | exprNode ret = exprNode_createPlain (ctype_unknown); | |
3171 | ||
3172 | ret->kind = XPR_INITBLOCK; | |
3173 | ret->edata = exprData_makeCall (exprNode_undefined, inits); | |
3174 | ret->loc = fileloc_update (ret->loc, lltok_getLoc (brace)); | |
3175 | ||
3176 | return (ret); | |
3177 | } | |
3178 | ||
3179 | exprNode | |
3180 | exprNode_functionCall (/*@only@*/ exprNode f, /*@only@*/ exprNodeList args) | |
3181 | { | |
3182 | ctype t; | |
3183 | ||
3184 | setCodePoint (); | |
3185 | ||
3186 | if (exprNode_isUndefined (f)) | |
3187 | { | |
3188 | exprNode_free (f); | |
3189 | exprNodeList_free (args); | |
3190 | return exprNode_undefined; | |
3191 | } | |
3192 | ||
3193 | t = exprNode_getType (f); | |
3194 | ||
3195 | if (sRef_isLocalVar (f->sref)) | |
3196 | { | |
3197 | exprNode_checkUse (f, f->sref, f->loc); | |
3198 | ||
3199 | if (sRef_possiblyNull (f->sref)) | |
3200 | { | |
3201 | if (!usymtab_isGuarded (f->sref)) | |
3202 | { | |
3203 | if (optgenerror (FLG_NULLDEREF, | |
3204 | message ("Function call using %s pointer %q", | |
3205 | sRef_nullMessage (f->sref), | |
3206 | sRef_unparse (f->sref)), | |
3207 | f->loc)) | |
3208 | { | |
3209 | sRef_showNullInfo (f->sref); | |
3210 | sRef_setNullError (f->sref); | |
3211 | } | |
3212 | } | |
3213 | } | |
3214 | } | |
3215 | ||
3216 | setCodePoint (); | |
3217 | ||
3218 | if (ctype_isRealFunction (t)) | |
3219 | { | |
3220 | exprNode ret = functionCallSafe (f, t, args); | |
3221 | setCodePoint (); | |
3222 | return ret; | |
3223 | } | |
3224 | else if (ctype_isUnknown (t)) | |
3225 | { | |
3226 | exprNode ret = exprNode_createPartialCopy (f); | |
3227 | cstring tstring; | |
3228 | ||
3229 | setCodePoint (); | |
3230 | ||
3231 | ret->typ = t; | |
3232 | exprNodeList_elements (args, current) | |
3233 | { | |
3234 | if (exprNode_isDefined (current)) | |
3235 | { | |
3236 | exprNode_checkUse (ret, current->sref, ret->loc); | |
3237 | ||
3238 | /* | |
3239 | ** also, anything derivable from current->sref may be used | |
3240 | */ | |
3241 | ||
3242 | exprNode_addUse (ret, sRef_makeDerived (current->sref)); | |
3243 | exprNode_mergeUSs (ret, current); | |
3244 | } | |
3245 | } end_exprNodeList_elements; | |
3246 | ||
3247 | ret->edata = exprData_makeCall (f, args); | |
3248 | ret->kind = XPR_CALL; | |
3249 | ||
3250 | tstring = cstring_copy (exprNode_unparse (f)); | |
3251 | ||
3252 | cstring_markOwned (tstring); | |
3253 | exprNode_checkSetAny (ret, tstring); | |
3254 | ||
3255 | return (ret); | |
3256 | } | |
3257 | else | |
3258 | { | |
3259 | voptgenerror (FLG_TYPE, | |
3260 | message ("Call to non-function (type %t): %s", t, | |
3261 | exprNode_unparse (f)), | |
3262 | f->loc); | |
3263 | exprNode_free (f); | |
3264 | exprNodeList_free (args); | |
3265 | ||
3266 | return (exprNode_makeError ()); | |
3267 | } | |
3268 | } | |
3269 | ||
3270 | exprNode | |
3271 | exprNode_fieldAccess (/*@only@*/ exprNode s, /*@only@*/ cstring f) | |
3272 | { | |
3273 | exprNode ret = exprNode_createPartialCopy (s); | |
3274 | ||
3275 | ret->kind = XPR_FACCESS; | |
3276 | ||
3277 | if (exprNode_isError (s)) | |
3278 | { | |
3279 | ret->edata = exprData_makeField (s, f); | |
3280 | return ret; | |
3281 | } | |
3282 | else | |
3283 | { | |
3284 | ctype t = exprNode_getType (s); | |
3285 | ctype tr = ctype_realType (t); | |
3286 | ||
3287 | checkMacroParen (s); | |
3288 | ||
3289 | ret->edata = exprData_makeField (s, f); | |
3290 | ||
3291 | if (ctype_isStructorUnion (tr)) | |
3292 | { | |
3293 | uentry tf = uentryList_lookupField (ctype_getFields (tr), f); | |
3294 | ||
3295 | if (uentry_isUndefined (tf)) | |
3296 | { | |
3297 | voptgenerror (FLG_TYPE, | |
3298 | message ("Access non-existent field %s of %t: %s", f, t, | |
3299 | exprNode_unparse (ret)), | |
3300 | s->loc); | |
3301 | ||
3302 | return (ret); | |
3303 | } | |
3304 | else | |
3305 | { | |
3306 | uentry_setUsed (tf, exprNode_loc (ret)); | |
3307 | ||
3308 | ret->typ = uentry_getType (tf); | |
3309 | checkSafeUse (ret, s->sref); | |
3310 | ||
3311 | ret->sref = sRef_makeField (s->sref, uentry_rawName (tf)); | |
3312 | return (ret); | |
3313 | } | |
3314 | } | |
3315 | else /* isStructorUnion */ | |
3316 | { | |
3317 | if (ctype_isRealAbstract (tr)) | |
3318 | { | |
3319 | voptgenerror | |
3320 | (FLG_ABSTRACT, | |
3321 | message ("Access field of abstract type (%t): %s.%s", | |
3322 | t, exprNode_unparse (s), f), | |
3323 | s->loc); | |
3324 | ret->typ = ctype_unknown; | |
3325 | } | |
3326 | else | |
3327 | { | |
3328 | if (ctype_isKnown (tr)) | |
3329 | { | |
3330 | voptgenerror | |
3331 | (FLG_TYPE, | |
3332 | message | |
3333 | ("Access field of non-struct or union (%t): %s.%s", | |
3334 | t, exprNode_unparse (s), f), | |
3335 | s->loc); | |
3336 | ||
3337 | ret->typ = ctype_unknown; | |
3338 | } | |
3339 | else | |
3340 | { | |
3341 | cstring sn = cstring_copy (f); | |
3342 | ||
3343 | checkSafeUse (ret, s->sref); | |
3344 | cstring_markOwned (sn); | |
3345 | ret->sref = sRef_makeField (s->sref, sn); | |
3346 | ||
3347 | return (ret); | |
3348 | } | |
3349 | } | |
3350 | return (ret); | |
3351 | } | |
3352 | } | |
3353 | BADEXIT; | |
3354 | } | |
3355 | ||
3356 | exprNode | |
3357 | exprNode_addParens (/*@only@*/ lltok lpar, /*@only@*/ exprNode e) | |
3358 | { | |
3359 | exprNode ret = exprNode_createPartialCopy (e); | |
3360 | ||
3361 | ret->loc = fileloc_update (ret->loc, lltok_getLoc (lpar)); | |
3362 | ret->kind = XPR_PARENS; | |
3363 | ret->edata = exprData_makeUop (e, lpar); | |
3364 | ||
3365 | if (!exprNode_isError (e)) | |
3366 | { | |
3367 | ret->exitCode = e->exitCode; | |
3368 | ret->canBreak = e->canBreak; | |
3369 | ret->mustBreak = e->mustBreak; | |
3370 | ret->isJumpPoint = e->isJumpPoint; | |
3371 | ret->sref = e->sref; | |
3372 | } | |
3373 | ||
3374 | return ret; | |
3375 | } | |
3376 | ||
3377 | exprNode | |
3378 | exprNode_arrowAccess (/*@only@*/ exprNode s, /*@only@*/ cstring f) | |
3379 | { | |
3380 | exprNode ret = exprNode_createPartialCopy (s); | |
3381 | ||
3382 | ret->edata = exprData_makeField (s, f); | |
3383 | ret->kind = XPR_ARROW; | |
3384 | ||
3385 | if (exprNode_isError (s)) | |
3386 | { | |
3387 | return (ret); | |
3388 | } | |
3389 | else | |
3390 | { | |
3391 | ctype t = exprNode_getType (s); | |
3392 | ctype tr = ctype_realType (t); | |
3393 | ||
3394 | checkMacroParen (s); | |
3395 | ||
3396 | (void) ctype_fixArrayPtr (tr); /* REWRITE THIS */ | |
3397 | ||
3398 | if (ctype_isRealPointer (tr)) | |
3399 | { | |
3400 | ctype b = ctype_realType (ctype_baseArrayPtr (tr)); | |
3401 | ||
3402 | if (ctype_isStructorUnion (b)) | |
3403 | { | |
3404 | uentry fentry = uentryList_lookupField (ctype_getFields (b), f); | |
3405 | ||
3406 | if (sRef_isKnown (s->sref) && sRef_possiblyNull (s->sref)) | |
3407 | { | |
3408 | if (!usymtab_isGuarded (s->sref) && !context_inProtectVars ()) | |
3409 | { | |
3410 | if (optgenerror | |
3411 | (FLG_NULLDEREF, | |
3412 | message ("Arrow access from %s pointer%q: %s", | |
3413 | sRef_nullMessage (s->sref), | |
3414 | sRef_unparsePreOpt (s->sref), | |
3415 | exprNode_unparse (ret)), | |
3416 | s->loc)) | |
3417 | { | |
3418 | sRef_showNullInfo (s->sref); | |
3419 | sRef_setNullError (s->sref); | |
3420 | } | |
3421 | } | |
3422 | } | |
3423 | ||
3424 | if (uentry_isUndefined (fentry)) | |
3425 | { | |
3426 | voptgenerror | |
3427 | (FLG_TYPE, | |
3428 | message ("Access non-existent field %s of %t: %s", | |
3429 | f, t, exprNode_unparse (ret)), | |
3430 | s->loc); | |
3431 | ret->typ = ctype_unknown; | |
3432 | ||
3433 | return (ret); | |
3434 | } | |
3435 | else | |
3436 | { | |
3437 | /* | |
3438 | ** was safeUse: shouldn't be safe! | |
3439 | ** | |
3440 | ** to do rec->field | |
3441 | ** rec must be defined, | |
3442 | ** *rec must be allocated | |
3443 | ** rec->field need only be defined it if is an rvalue | |
3444 | */ | |
3445 | ||
3446 | uentry_setUsed (fentry, exprNode_loc (ret)); | |
3447 | ret->typ = uentry_getType (fentry); | |
3448 | ||
3449 | exprNode_checkUse (ret, s->sref, s->loc); | |
3450 | ||
3451 | /* exprNode_checkUse (ret, sRef_makePointer (s->sref), s->loc); */ | |
3452 | ret->sref = sRef_makeArrow (s->sref, uentry_rawName (fentry)); | |
3453 | return (ret); | |
3454 | } | |
3455 | } | |
3456 | else /* Pointer to something that is not a struct or union*/ | |
3457 | { | |
3458 | if (ctype_isRealAbstract (tr)) | |
3459 | { | |
3460 | ctype xrt = ctype_forceRealType (tr); | |
3461 | ||
3462 | voptgenerror | |
3463 | (FLG_ABSTRACT, | |
3464 | message ("Arrow access field of abstract type (%t): %s->%s", | |
3465 | t, exprNode_unparse (s), f), | |
3466 | s->loc); | |
3467 | ||
3468 | /* | |
3469 | ** Set the state correctly, as if the abstraction is broken. | |
3470 | */ | |
3471 | ||
3472 | if (ctype_isRealPointer (xrt) && | |
3473 | (b = ctype_realType (ctype_baseArrayPtr (xrt)), | |
3474 | ctype_isStructorUnion (b))) | |
3475 | { | |
3476 | uentry fentry = uentryList_lookupField (ctype_getFields (b), f); | |
3477 | ret->typ = uentry_getType (fentry); | |
3478 | ret->sref = sRef_makeArrow (s->sref, uentry_rawName (fentry)); | |
3479 | } | |
3480 | else | |
3481 | { | |
3482 | ret->typ = ctype_unknown; | |
3483 | ret->sref = sRef_undefined; | |
3484 | } | |
3485 | } | |
3486 | else /* not a struct, union or abstract */ | |
3487 | { | |
3488 | if (ctype_isUnknown (tr)) { | |
3489 | cstring sn = cstring_copy (f); | |
3490 | ||
3491 | DPRINTF (("Here: %s", exprNode_unparse (s))); | |
3492 | ||
3493 | exprNode_checkUse (ret, s->sref, s->loc); | |
3494 | exprNode_checkUse (ret, sRef_makePointer (s->sref), s->loc); | |
3495 | ||
3496 | cstring_markOwned (sn); | |
3497 | ret->sref = sRef_makeArrow (s->sref, sn); | |
3498 | ||
3499 | ret->kind = XPR_ARROW; | |
3500 | return (ret); | |
3501 | } else { | |
3502 | voptgenerror | |
3503 | (FLG_TYPE, | |
3504 | message ("Arrow access field of non-struct or union " | |
3505 | "pointer (%t): %s->%s", | |
3506 | t, exprNode_unparse (s), f), | |
3507 | s->loc); | |
3508 | ||
3509 | ret->typ = ctype_unknown; | |
3510 | ret->sref = sRef_undefined; | |
3511 | } | |
3512 | } | |
3513 | } | |
3514 | } | |
3515 | else /* its not a pointer */ | |
3516 | { | |
3517 | if (!ctype_isUnknown (tr)) | |
3518 | { | |
3519 | voptgenerror | |
3520 | (FLG_TYPE, | |
3521 | message ("Arrow access of non-pointer (%t): %s->%s", | |
3522 | t, exprNode_unparse (s), f), | |
3523 | s->loc); | |
3524 | ||
3525 | ret->typ = ctype_unknown; | |
3526 | ret->sref = sRef_undefined; | |
3527 | } | |
3528 | else | |
3529 | { | |
3530 | cstring sn = cstring_copy (f); | |
3531 | ||
3532 | DPRINTF (("Here: %s", exprNode_unparse (s))); | |
3533 | ||
3534 | exprNode_checkUse (ret, s->sref, s->loc); | |
3535 | exprNode_checkUse (ret, sRef_makePointer (s->sref), s->loc); | |
3536 | ||
3537 | cstring_markOwned (sn); | |
3538 | ret->sref = sRef_makeArrow (s->sref, sn); | |
3539 | ||
3540 | ret->kind = XPR_ARROW; | |
3541 | return (ret); | |
3542 | } | |
3543 | } | |
3544 | ||
3545 | return (ret); | |
3546 | } | |
3547 | BADEXIT; | |
3548 | } | |
3549 | ||
3550 | /* | |
3551 | ** only postOp's in C: i++ and i-- | |
3552 | */ | |
3553 | ||
3554 | exprNode | |
3555 | exprNode_postOp (/*@only@*/ exprNode e, /*@only@*/ lltok op) | |
3556 | { | |
3557 | /* check modification also */ | |
3558 | /* cstring opname = lltok_unparse (op);*/ | |
3559 | ctype t; | |
3560 | exprNode ret = exprNode_createPartialCopy (e); | |
3561 | ||
3562 | ret->loc = fileloc_update (ret->loc, lltok_getLoc (op)); | |
3563 | ret->kind = XPR_POSTOP; | |
3564 | ret->edata = exprData_makeUop (e, op); | |
3565 | ||
3566 | if (!exprNode_isDefined (e)) | |
3567 | { | |
3568 | return ret; | |
3569 | } | |
3570 | ||
3571 | checkMacroParen (e); | |
3572 | ||
3573 | exprNode_checkUse (ret, e->sref, e->loc); | |
3574 | exprNode_checkSet (ret, e->sref); | |
3575 | ||
3576 | t = exprNode_getType (e); | |
3577 | ||
3578 | if (sRef_isUnsafe (e->sref)) | |
3579 | { | |
3580 | voptgenerror (FLG_MACROPARAMS, | |
3581 | message ("Operand of %s is macro parameter (non-functional): %s%s", | |
3582 | lltok_unparse (op), exprNode_unparse (e), lltok_unparse (op)), | |
3583 | e->loc); | |
3584 | sRef_makeSafe (e->sref); | |
3585 | sRef_makeSafe (ret->sref); | |
3586 | } | |
3587 | ||
3588 | if (ctype_isForceRealNumeric (&t) || ctype_isRealAP (t)) | |
3589 | { | |
3590 | ret->typ = e->typ; | |
3591 | } | |
3592 | else | |
3593 | { | |
3594 | if (ctype_isRealAbstract (t)) | |
3595 | { | |
3596 | voptgenerror | |
3597 | (FLG_ABSTRACT, | |
3598 | message ("Operand of %s is abstract type (%t): %s", | |
3599 | lltok_unparse (op), t, exprNode_unparse (e)), | |
3600 | e->loc); | |
3601 | } | |
3602 | else | |
3603 | { | |
3604 | voptgenerror | |
3605 | (FLG_TYPE, | |
3606 | message ("Operand of %s is non-numeric (%t): %s", | |
3607 | lltok_unparse (op), t, exprNode_unparse (e)), | |
3608 | e->loc); | |
3609 | } | |
3610 | ret->typ = ctype_unknown; | |
3611 | } | |
3612 | ||
3613 | /* if (ctype_isZero (t)) e->typ = ctype_int; */ | |
3614 | ||
3615 | exprNode_checkModify (e, ret); | |
3616 | ||
3617 | /* added 7/11/2000 D.L */ | |
84c9ffbf | 3618 | /*@i223*/ |
3619 | /*DRL 6/8/01 I decided to disable all LCLint Warning here since the code | |
3620 | probably needs a rewrite any way */ | |
3621 | ||
3622 | /*@ignore@*/ | |
3623 | ||
dc92450f | 3624 | // updateEnvironmentForPostOp (e); |
616915dd | 3625 | |
3626 | /* start modifications */ | |
3627 | /* added by Seejo on 4/16/2000 */ | |
3628 | ||
3629 | /* Arithmetic operations on pointers wil modify the size/len/null terminated | |
3630 | status */ | |
3631 | if ((sRef_isPossiblyNullTerminated (e->sref)) || (sRef_isNullTerminated(e->sref))) { | |
3632 | ||
3633 | ret->sref = sRef_copy (e->sref); | |
3634 | ||
3635 | /* Operator : ++ */ | |
3636 | if (lltok_getTok (op) == INC_OP) { | |
3637 | if (sRef_getSize(e->sref) > 0) { | |
3638 | ||
3639 | sRef_setSize (ret->sref, sRef_getSize(e->sref) - 1); | |
3640 | ||
3641 | if (sRef_getLen(e->sref) == 1) { /* i.e. the first character is \0 */ | |
3642 | /* Assumption: there is only 1 \0 in the buffer */ | |
3643 | /* This will not be correct if there are 2 \0's in the buffer */ | |
3644 | sRef_setNotNullTerminatedState(ret->sref); | |
3645 | sRef_resetLen(ret->sref); | |
3646 | } else { | |
3647 | sRef_setNullTerminatedState(ret->sref); | |
3648 | sRef_setLen (ret->sref, sRef_getLen(e->sref) - 1); | |
3649 | } | |
3650 | if (sRef_isNullTerminated (ret->sref)) | |
3651 | printf ("ret->sref is Null Terminated\n"); | |
3652 | else if (sRef_isPossiblyNullTerminated (ret->sref)) | |
3653 | printf ("ret->sref is Possibly Null Terminated\n"); | |
3654 | else if (sRef_isNotNullTerminated (ret->sref)) | |
3655 | printf ("ret->sref is Not Null Terminated\n"); | |
3656 | } | |
3657 | } | |
3658 | ||
3659 | /* Operator : -- */ | |
3660 | if (lltok_getTok (op) == DEC_OP) { | |
3661 | if (sRef_getSize(e->sref) >= 0) { | |
3662 | sRef_setSize (ret->sref, sRef_getSize(e->sref) + 1); | |
3663 | sRef_setLen (ret->sref, sRef_getLen(e->sref) + 1); | |
3664 | } | |
3665 | } | |
3666 | } | |
84c9ffbf | 3667 | /*@end@*/ |
616915dd | 3668 | /* end modifications */ |
3669 | ||
3670 | return ret; | |
3671 | } | |
3672 | ||
3673 | exprNode | |
3674 | exprNode_preOp (/*@only@*/ exprNode e, /*@only@*/ lltok op) | |
3675 | { | |
3676 | bool checkMod = FALSE; | |
3677 | ctype te, tr; | |
3678 | int opid = lltok_getTok (op); | |
3679 | exprNode ret = exprNode_createSemiCopy (e); | |
3680 | ||
3681 | exprNode_copySets (ret, e); | |
3682 | ||
3683 | multiVal_free (ret->val); | |
3684 | ret->val = multiVal_undefined; | |
3685 | ret->loc = fileloc_update (ret->loc, lltok_getLoc (op)); | |
3686 | ret->kind = XPR_PREOP; | |
3687 | ret->edata = exprData_makeUop (e, op); | |
3688 | ||
3689 | if (exprNode_isError (e)) | |
3690 | { | |
3691 | return ret; | |
3692 | } | |
3693 | ||
3694 | checkMacroParen (e); | |
3695 | ||
3696 | te = exprNode_getType (e); | |
3697 | tr = ctype_realType (te); | |
3698 | ||
3699 | if (opid != TAMPERSAND) | |
3700 | { | |
3701 | exprNode_checkUse (ret, e->sref, e->loc); | |
3702 | ||
3703 | if (ctype_isRealAbstract (tr) | |
3704 | && (!(ctype_isRealBool (te) && (opid == TEXCL)))) | |
3705 | { | |
3706 | if (optgenerror (FLG_ABSTRACT, | |
3707 | message ("Operand of %s is abstract type (%t): %s", | |
3708 | lltok_unparse (op), tr, | |
3709 | exprNode_unparse (ret)), | |
3710 | e->loc)) | |
3711 | { | |
3712 | tr = te = ctype_unknown; | |
3713 | ret->typ = ctype_unknown; | |
3714 | sRef_setNullError (e->sref); | |
3715 | } | |
3716 | } | |
3717 | } | |
3718 | ||
3719 | switch (opid) | |
3720 | { | |
3721 | case INC_OP: | |
3722 | case DEC_OP: /* should also check modification! */ | |
3723 | ||
3724 | if (sRef_isMacroParamRef (e->sref)) | |
3725 | { | |
3726 | voptgenerror | |
3727 | (FLG_MACROPARAMS, | |
3728 | message ("Operand of %s is macro parameter (non-functional): %s", | |
3729 | lltok_unparse (op), exprNode_unparse (ret)), | |
3730 | e->loc); | |
3731 | } | |
3732 | else | |
3733 | { | |
3734 | exprNode_checkSet (ret, e->sref); | |
3735 | } | |
3736 | ||
3737 | if (ctype_isForceRealNumeric (&tr) || ctype_isRealAP (tr)) | |
3738 | { | |
3739 | } | |
3740 | else | |
3741 | { | |
3742 | if (context_msgStrictOps ()) | |
3743 | { | |
3744 | voptgenerror | |
3745 | (FLG_STRICTOPS, | |
3746 | message ("Operand of %s is non-numeric (%t): %s", | |
3747 | lltok_unparse (op), te, exprNode_unparse (ret)), | |
3748 | e->loc); | |
3749 | } | |
3750 | ret->typ = ctype_int; | |
3751 | } | |
3752 | ||
3753 | /* start modifications */ | |
3754 | /* added by Seejo on 4/16/2000 */ | |
3755 | ||
3756 | /* Arithmetic operations on pointers wil modify the size/len/null terminated | |
3757 | status */ | |
3758 | if ((sRef_isPossiblyNullTerminated (e->sref)) || (sRef_isNullTerminated(e->sref))) { | |
3759 | ||
3760 | ret->sref = sRef_copy (e->sref); | |
3761 | ||
3762 | /* Operator : ++ */ | |
3763 | if (lltok_getTok (op) == INC_OP) { | |
3764 | if (sRef_getSize(e->sref) > 0) { | |
3765 | ||
3766 | sRef_setSize (ret->sref, sRef_getSize(e->sref) - 1); | |
3767 | ||
3768 | if (sRef_getLen(e->sref) == 1) { /* i.e. the first character is \0 */ | |
3769 | /* Assumption: there is only 1 \0 in the buffer */ | |
3770 | /* This will not be correct if there are 2 \0's in the buffer */ | |
3771 | sRef_setNotNullTerminatedState(ret->sref); | |
3772 | sRef_resetLen (ret->sref); | |
3773 | } else { | |
3774 | sRef_setNullTerminatedState(ret->sref); | |
3775 | sRef_setLen (ret->sref, sRef_getLen(e->sref) - 1); | |
3776 | } | |
3777 | } | |
3778 | } | |
3779 | ||
3780 | /* Operator : -- */ | |
3781 | if (lltok_getTok (op) == DEC_OP) { | |
3782 | if (sRef_getSize(e->sref) >= 0) { | |
3783 | sRef_setSize (ret->sref, sRef_getSize(e->sref) + 1); | |
3784 | sRef_setLen (ret->sref, sRef_getLen(e->sref) + 1); | |
3785 | } | |
3786 | } | |
3787 | } | |
3788 | ||
3789 | /* end modifications */ | |
3790 | ||
3791 | checkMod = TRUE; | |
3792 | break; | |
3793 | ||
3794 | case TMINUS: | |
3795 | case TPLUS: | |
3796 | if (ctype_isForceRealNumeric (&tr)) | |
3797 | { | |
3798 | if (opid == TMINUS) | |
3799 | { | |
3800 | ret->val = multiVal_invert (exprNode_getValue (e)); | |
3801 | } | |
3802 | else | |
3803 | { | |
3804 | ret->val = multiVal_copy (exprNode_getValue (e)); | |
3805 | } | |
3806 | } | |
3807 | else | |
3808 | { | |
3809 | if (context_msgStrictOps ()) | |
3810 | { | |
3811 | voptgenerror | |
3812 | (FLG_STRICTOPS, | |
3813 | message ("Operand of %s is non-numeric (%t): %s", | |
3814 | lltok_unparse (op), te, exprNode_unparse (ret)), | |
3815 | e->loc); | |
3816 | } | |
3817 | ||
3818 | ret->typ = ctype_int; | |
3819 | } | |
3820 | break; | |
3821 | ||
3822 | case TEXCL: /* maybe this should be restricted */ | |
3823 | guardSet_flip (ret->guards); | |
3824 | ||
3825 | if (ctype_isRealBool (te)) | |
3826 | { | |
3827 | ; | |
3828 | } | |
3829 | else | |
3830 | { | |
3831 | if (ctype_isRealPointer (tr)) | |
3832 | { | |
3833 | if (sRef_isKnown (e->sref)) | |
3834 | { | |
3835 | ret->guards = guardSet_addFalseGuard (ret->guards, e->sref); | |
3836 | } | |
3837 | ||
3838 | voptgenerror2n | |
3839 | (FLG_BOOLOPS, FLG_PTRNEGATE, | |
3840 | message ("Operand of %s is non-boolean (%t): %s", | |
3841 | lltok_unparse (op), te, exprNode_unparse (ret)), | |
3842 | e->loc); | |
3843 | } | |
3844 | else | |
3845 | { | |
3846 | voptgenerror | |
3847 | (FLG_BOOLOPS, | |
3848 | message ("Operand of %s is non-boolean (%t): %s", | |
3849 | lltok_unparse (op), te, exprNode_unparse (ret)), | |
3850 | e->loc); | |
3851 | } | |
3852 | ||
3853 | ret->typ = ctype_bool; | |
3854 | } | |
3855 | break; | |
3856 | ||
3857 | case TTILDE: | |
3858 | if (ctype_isForceRealInt (&tr)) | |
3859 | { | |
3860 | } | |
3861 | else | |
3862 | { | |
3863 | if (context_msgStrictOps ()) | |
3864 | { | |
3865 | voptgenerror | |
3866 | (FLG_STRICTOPS, | |
3867 | message ("Operand of %s is non-integer (%t): %s", | |
3868 | lltok_unparse (op), te, exprNode_unparse (ret)), | |
3869 | e->loc); | |
3870 | } | |
3871 | ||
3872 | if (ctype_isInt (e->typ)) | |
3873 | { | |
3874 | ret->typ = e->typ; | |
3875 | } | |
3876 | else | |
3877 | { | |
3878 | ret->typ = ctype_int; | |
3879 | } | |
3880 | } | |
3881 | break; | |
3882 | ||
3883 | case TAMPERSAND: | |
3884 | ret->typ = ctype_makePointer (e->typ); | |
3885 | ||
3886 | if (sRef_isKnown (e->sref)) | |
3887 | { | |
3888 | ret->sref = sRef_makeAddress (e->sref); | |
3889 | } | |
3890 | ||
3891 | break; | |
3892 | ||
3893 | case TMULT: | |
3894 | ||
3895 | if (ctype_isAP (tr)) | |
3896 | { | |
3897 | ret->typ = ctype_baseArrayPtr (e->typ); | |
3898 | } | |
3899 | else | |
3900 | { | |
3901 | if (ctype_isKnown (te)) | |
3902 | { | |
3903 | if (ctype_isFunction (te)) | |
3904 | { | |
3905 | ret->typ = e->typ; | |
3906 | ||
3907 | voptgenerror | |
3908 | (FLG_FCNDEREF, | |
3909 | message ("Dereference of function type (%t): %s", | |
3910 | te, exprNode_unparse (ret)), | |
3911 | e->loc); | |
3912 | } | |
3913 | else | |
3914 | { | |
3915 | voptgenerror (FLG_TYPE, | |
3916 | message ("Dereference of non-pointer (%t): %s", | |
3917 | te, exprNode_unparse (ret)), | |
3918 | e->loc); | |
3919 | ret->typ = ctype_unknown; | |
3920 | } | |
3921 | } | |
3922 | else | |
3923 | { | |
3924 | ret->typ = ctype_unknown; | |
3925 | } | |
3926 | ||
3927 | } | |
3928 | ||
3929 | if (sRef_isKnown (e->sref)) | |
3930 | { | |
3931 | if (sRef_possiblyNull (e->sref)) | |
3932 | { | |
3933 | if (!usymtab_isGuarded (e->sref) && !context_inProtectVars ()) | |
3934 | { | |
3935 | if (optgenerror | |
3936 | (FLG_NULLDEREF, | |
3937 | message ("Dereference of %s pointer %q: %s", | |
3938 | sRef_nullMessage (e->sref), | |
3939 | sRef_unparse (e->sref), | |
3940 | exprNode_unparse (ret)), | |
3941 | e->loc)) | |
3942 | { | |
3943 | sRef_showNullInfo (e->sref); | |
3944 | sRef_setNotNull (e->sref, e->loc); /* suppress future messages */ | |
3945 | } | |
3946 | } | |
3947 | } | |
3948 | ||
3949 | ret->sref = sRef_makePointer (e->sref); | |
3950 | } | |
3951 | break; | |
3952 | ||
3953 | default: | |
3954 | llbug (message ("exprNode_preOp: unhandled op: %s", lltok_unparse (op))); | |
3955 | } | |
3956 | ||
3957 | if (checkMod) | |
3958 | { | |
3959 | exprNode_checkModify (e, ret); | |
3960 | } | |
3961 | ||
3962 | return ret; | |
3963 | } | |
3964 | ||
3965 | /* | |
3966 | ** any reason to disallow sizeof (abstract type) ? | |
3967 | */ | |
3968 | ||
3969 | /* | |
3970 | ** used by both sizeof | |
3971 | */ | |
3972 | ||
3973 | static | |
3974 | ctype sizeof_resultType (void) | |
3975 | { | |
3976 | static ctype sizet = ctype_unknown; | |
3977 | ||
3978 | if (ctype_isUnknown (sizet)) | |
3979 | { | |
3980 | if (usymtab_existsType (cstring_makeLiteralTemp ("size_t"))) | |
3981 | { | |
3982 | sizet = uentry_getAbstractType (usymtab_lookup (cstring_makeLiteralTemp ("size_t"))); | |
3983 | } | |
3984 | else | |
3985 | { | |
3986 | sizet = ctype_ulint; | |
3987 | } | |
3988 | } | |
3989 | return sizet; | |
3990 | } | |
3991 | ||
3992 | exprNode | |
3993 | exprNode_sizeofType (/*@only@*/ qtype qt) | |
3994 | { | |
3995 | exprNode ret = exprNode_create (sizeof_resultType ()); | |
3996 | ctype ct = qtype_getType (qt); | |
3997 | ||
3998 | ret->kind = XPR_SIZEOFT; | |
3999 | ret->edata = exprData_makeSizeofType (qt); | |
4000 | ||
4001 | voptgenerror (FLG_SIZEOFTYPE, | |
4002 | message ("Parameter to sizeof is type %s: %s", | |
4003 | ctype_unparse (ct), | |
4004 | exprNode_unparse (ret)), | |
4005 | ret->loc); | |
4006 | ||
4007 | return (ret); | |
4008 | } | |
4009 | ||
4010 | exprNode | |
4011 | exprNode_alignofType (/*@only@*/ qtype qt) | |
4012 | { | |
4013 | exprNode ret = exprNode_create (sizeof_resultType ()); | |
4014 | ctype ct = qtype_getType (qt); | |
4015 | ||
4016 | ret->kind = XPR_ALIGNOFT; | |
4017 | ret->edata = exprData_makeSizeofType (qt); | |
4018 | ||
4019 | voptgenerror (FLG_SIZEOFTYPE, | |
4020 | message ("Parameter to alignof is type %s: %s", | |
4021 | ctype_unparse (ct), | |
4022 | exprNode_unparse (ret)), | |
4023 | ret->loc); | |
4024 | ||
4025 | return (ret); | |
4026 | } | |
4027 | ||
4028 | exprNode exprNode_offsetof (qtype qt, cstringList s) | |
4029 | { | |
4030 | exprNode ret = exprNode_create (sizeof_resultType ()); | |
4031 | ctype ct = qtype_getType (qt); | |
4032 | ||
4033 | ret->kind = XPR_OFFSETOF; | |
4034 | ret->edata = exprData_makeOffsetof (qt, s); | |
4035 | ||
4036 | if (!ctype_isRealSU (ct)) | |
4037 | { | |
4038 | voptgenerror (FLG_TYPE, | |
4039 | message ("First parameter to offsetof is not a " | |
4040 | "struct or union type (type %s): %s", | |
4041 | ctype_unparse (ct), | |
4042 | exprNode_unparse (ret)), | |
4043 | ret->loc); | |
4044 | } | |
4045 | else | |
4046 | { | |
4047 | ctype lt = ct; | |
4048 | ||
4049 | cstringList_elements (s, el) { | |
4050 | uentryList fields; | |
4051 | uentry fld; | |
4052 | ||
4053 | if (ctype_isUndefined (lt)) | |
4054 | { | |
4055 | break; | |
4056 | } | |
4057 | else if (!ctype_isRealSU (lt)) | |
4058 | { | |
4059 | voptgenerror (FLG_TYPE, | |
4060 | message ("Inner offsetof type is not a " | |
4061 | "struct or union type (type %s before field %s): %s", | |
4062 | ctype_unparse (lt), el, | |
4063 | exprNode_unparse (ret)), | |
4064 | ret->loc); | |
4065 | break; | |
4066 | } | |
4067 | else | |
4068 | { | |
4069 | fields = ctype_getFields (ctype_realType (lt)); | |
4070 | fld = uentryList_lookupField (fields, el); | |
4071 | DPRINTF (("Try: %s / %s", ctype_unparse (lt), el)); | |
4072 | ||
4073 | if (uentry_isUndefined (fld)) | |
4074 | { | |
4075 | if (ctype_equal (lt, ct)) { | |
4076 | voptgenerror (FLG_TYPE, | |
4077 | message ("Field %s in offsetof is not the " | |
4078 | "name of a field of %s: %s", | |
4079 | el, | |
4080 | ctype_unparse (ct), | |
4081 | exprNode_unparse (ret)), | |
4082 | ret->loc); | |
4083 | } else { | |
4084 | voptgenerror (FLG_TYPE, | |
4085 | message ("Deep field %s in offsetof is not the " | |
4086 | "name of a field of %s: %s", | |
4087 | el, | |
4088 | ctype_unparse (lt), | |
4089 | exprNode_unparse (ret)), | |
4090 | ret->loc); | |
4091 | } | |
4092 | } | |
4093 | else | |
4094 | { | |
4095 | lt = uentry_getType (fld); | |
4096 | } | |
4097 | } | |
4098 | } end_cstringList_elements; | |
4099 | ||
4100 | /* Should report error if its a bit field - behavior is undefined! */ | |
4101 | } | |
4102 | ||
4103 | return (ret); | |
4104 | } | |
4105 | ||
4106 | /*@only@*/ exprNode | |
4107 | exprNode_sizeofExpr (/*@only@*/ exprNode e) | |
4108 | { | |
4109 | exprNode ret; | |
4110 | ||
4111 | if (exprNode_isUndefined (e)) | |
4112 | { | |
4113 | ret = exprNode_createLoc (ctype_unknown, fileloc_copy (g_currentloc)); | |
4114 | ret->edata = exprData_makeSingle (e); | |
4115 | ret->typ = sizeof_resultType (); | |
4116 | ret->kind = XPR_SIZEOF; | |
4117 | } | |
4118 | else | |
4119 | { | |
4120 | uentry u = exprNode_getUentry (e); | |
4121 | ||
4122 | ret = exprNode_createPartialCopy (e); | |
4123 | ret->edata = exprData_makeSingle (e); | |
4124 | ||
4125 | ret->typ = sizeof_resultType (); | |
4126 | ret->kind = XPR_SIZEOF; | |
4127 | ||
4128 | if (uentry_isValid (u) | |
4129 | && uentry_isRefParam (u) | |
4130 | && ctype_isRealArray (uentry_getType (u))) | |
4131 | { | |
4132 | voptgenerror | |
4133 | (FLG_SIZEOFFORMALARRAY, | |
4134 | message ("Parameter to sizeof is an array-type function parameter: %s", | |
4135 | exprNode_unparse (ret)), | |
4136 | ret->loc); | |
4137 | } | |
4138 | } | |
4139 | ||
4140 | /* | |
4141 | ** sizeof (x) doesn't "really" use x | |
4142 | */ | |
4143 | ||
4144 | return (ret); | |
4145 | } | |
4146 | ||
4147 | /*@only@*/ exprNode | |
4148 | exprNode_alignofExpr (/*@only@*/ exprNode e) | |
4149 | { | |
4150 | exprNode ret; | |
4151 | ||
4152 | if (exprNode_isUndefined (e)) | |
4153 | { | |
4154 | ret = exprNode_createLoc (ctype_unknown, fileloc_copy (g_currentloc)); | |
4155 | } | |
4156 | else | |
4157 | { | |
4158 | ret = exprNode_createPartialCopy (e); | |
4159 | } | |
4160 | ||
4161 | ret->edata = exprData_makeSingle (e); | |
4162 | ret->typ = sizeof_resultType (); | |
4163 | ret->kind = XPR_ALIGNOF; | |
4164 | ||
4165 | /* | |
4166 | ** sizeof (x) doesn't "really" use x | |
4167 | */ | |
4168 | ||
4169 | return (ret); | |
4170 | } | |
4171 | ||
4172 | /*@only@*/ exprNode | |
4173 | exprNode_cast (/*@only@*/ lltok tok, /*@only@*/ exprNode e, /*@only@*/ qtype q) | |
4174 | { | |
4175 | ctype c; | |
4176 | ctype t; | |
4177 | exprNode ret; | |
4178 | ||
4179 | if (exprNode_isError (e)) | |
4180 | { | |
4181 | qtype_free (q); | |
4182 | lltok_release (tok); | |
4183 | return exprNode_undefined; | |
4184 | } | |
4185 | ||
4186 | checkMacroParen (e); | |
4187 | ||
4188 | c = qtype_getType (q); | |
4189 | t = exprNode_getType (e); | |
4190 | ||
4191 | ret = exprNode_createPartialCopy (e); | |
4192 | ||
4193 | ret->loc = fileloc_update (ret->loc, lltok_getLoc (tok)); | |
4194 | ret->typ = c; | |
4195 | ret->kind = XPR_CAST; | |
4196 | ret->edata = exprData_makeCast (tok, e, q); | |
4197 | ||
4198 | if (ctype_isRealSU (ctype_getBaseType (sRef_getType (e->sref)))) | |
4199 | { | |
4200 | /* | |
4201 | ** This is a bit of a hack to avoid a problem | |
4202 | ** when the code does, | |
4203 | ** (some other struct) x | |
4204 | ** ... | |
4205 | ** x->field | |
4206 | */ | |
4207 | ||
4208 | ret->sref = sRef_copy (e->sref); | |
4209 | usymtab_addForceMustAlias (ret->sref, e->sref); | |
4210 | sRef_setTypeFull (ret->sref, c); | |
4211 | DPRINTF (("Cast: %s -> %s", sRef_unparseFull (e->sref), | |
4212 | sRef_unparseFull (ret->sref))); | |
4213 | } | |
4214 | else | |
4215 | { | |
4216 | ret->sref = e->sref; | |
4217 | sRef_setTypeFull (ret->sref, c); | |
4218 | DPRINTF (("Cast 2: -> %s", sRef_unparseFull (ret->sref))); | |
4219 | } | |
4220 | ||
4221 | /* | |
4222 | ** we allow | |
4223 | ** abstract -> void | |
4224 | ** 0 <-> abstract * | |
4225 | ** void * <-> abstract * (if FLG_ABSTVOIDP) | |
4226 | ** abstract * <-> void * (if FLG_ABSTVOIDP) | |
4227 | */ | |
4228 | ||
4229 | if (ctype_isVoid (c)) /* cast to void is always okay --- discard value */ | |
4230 | { | |
4231 | ; | |
4232 | } | |
4233 | else if (ctype_isRealAP (c)) /* casting to array or pointer */ | |
4234 | { | |
4235 | ctype bc = ctype_getBaseType (c); | |
4236 | ctype bt = ctype_getBaseType (t); | |
4237 | ctype rt = ctype_realType (t); | |
4238 | ||
4239 | if (ctype_isFunction (ctype_baseArrayPtr (ctype_realType (c))) | |
4240 | && (ctype_isArrayPtr (rt) | |
4241 | && !ctype_isFunction (ctype_realType (ctype_baseArrayPtr (rt))))) | |
4242 | { | |
4243 | voptgenerror | |
4244 | (FLG_CASTFCNPTR, | |
4245 | message ("Cast from function pointer type (%t) to " | |
4246 | "non-function pointer (%t): %s", | |
4247 | c, t, exprNode_unparse (ret)), | |
4248 | e->loc); | |
4249 | } | |
4250 | ||
4251 | if (!ctype_isFunction (ctype_baseArrayPtr (c)) | |
4252 | && (ctype_isArrayPtr (rt) | |
4253 | && ctype_isFunction (ctype_realType (ctype_baseArrayPtr (rt))))) | |
4254 | { | |
4255 | voptgenerror | |
4256 | (FLG_CASTFCNPTR, | |
4257 | message ("Cast from non-function pointer type (%t) to " | |
4258 | "function pointer (%t): %s", | |
4259 | c, t, exprNode_unparse (ret)), | |
4260 | e->loc); | |
4261 | } | |
4262 | ||
4263 | if (exprNode_isZero (e) && context_getFlag (FLG_ZEROPTR) && | |
4264 | !(ctype_isRealAbstract (bc) | |
4265 | && context_hasAccess (ctype_typeId (bc)))) | |
4266 | { | |
4267 | ; /* okay to cast zero */ | |
4268 | } | |
4269 | else | |
4270 | { | |
4271 | if (ctype_isRealAbstract (bc) | |
4272 | && !context_hasAccess (ctype_typeId (bc))) | |
4273 | { | |
4274 | if (ctype_isVoidPointer (t) || ctype_isUnknown (t)) | |
4275 | { | |
4276 | vnoptgenerror | |
4277 | (FLG_ABSTVOIDP, | |
4278 | message ("Cast to underlying abstract type %t: %s", | |
4279 | c, exprNode_unparse (ret)), | |
4280 | e->loc); | |
4281 | } | |
4282 | else | |
4283 | { | |
4284 | voptgenerror | |
4285 | (FLG_ABSTRACT, | |
4286 | message ("Cast to underlying abstract type %t: %s", | |
4287 | c, exprNode_unparse (ret)), | |
4288 | e->loc); | |
4289 | } | |
4290 | } | |
4291 | ||
4292 | if (ctype_isRealAbstract (bt) | |
4293 | && !context_hasAccess (ctype_typeId (bt))) | |
4294 | { | |
4295 | if (ctype_isUnknown (c) || ctype_isVoidPointer (c)) | |
4296 | { | |
4297 | vnoptgenerror | |
4298 | (FLG_ABSTVOIDP, | |
4299 | message ("Cast from underlying abstract type %t: %s", | |
4300 | t, exprNode_unparse (ret)), | |
4301 | e->loc); | |
4302 | } | |
4303 | else | |
4304 | { | |
4305 | voptgenerror | |
4306 | (FLG_ABSTRACT, | |
4307 | message ("Cast from underlying abstract type %t: %s", | |
4308 | t, exprNode_unparse (ret)), | |
4309 | e->loc); | |
4310 | } | |
4311 | } | |
4312 | } | |
4313 | } | |
4314 | else | |
4315 | { | |
4316 | ctype bt = ctype_realType (ctype_getBaseType (t)); | |
4317 | ctype bc = ctype_realType (ctype_getBaseType (c)); | |
4318 | ||
4319 | if (ctype_isAbstract (bt) && !context_hasAccess (ctype_typeId (bt))) | |
4320 | { | |
4321 | if (ctype_match (c, t)) | |
4322 | { | |
4323 | if (ctype_equal (c, t)) | |
4324 | { | |
4325 | voptgenerror | |
4326 | (FLG_TYPE, | |
4327 | message ("Redundant cast involving abstract type %t: %s", | |
4328 | bt, exprNode_unparse (ret)), | |
4329 | e->loc); | |
4330 | } | |
4331 | } | |
4332 | else | |
4333 | { | |
4334 | voptgenerror | |
4335 | (FLG_ABSTRACT, | |
4336 | message ("Cast from abstract type %t: %s", | |
4337 | bt, exprNode_unparse (ret)), | |
4338 | e->loc); | |
4339 | } | |
4340 | } | |
4341 | ||
4342 | if (ctype_isAbstract (bc) | |
4343 | && !context_hasAccess (ctype_typeId (bc))) | |
4344 | { | |
4345 | if (ctype_match (c, t)) | |
4346 | { | |
4347 | ; | |
4348 | } | |
4349 | else | |
4350 | { | |
4351 | voptgenerror | |
4352 | (FLG_ABSTRACT, | |
4353 | message ("Cast to abstract type %t: %s", bc, | |
4354 | exprNode_unparse (ret)), | |
4355 | e->loc); | |
4356 | } | |
4357 | } | |
4358 | } | |
4359 | ||
4360 | if (ctype_isAbstract (c)) | |
4361 | { | |
4362 | if (sRef_isExposed (e->sref) || sRef_isOnly (e->sref)) | |
4363 | { | |
4364 | /* okay, cast exposed to abstract */ | |
4365 | sRef_clearExKindComplete (ret->sref, fileloc_undefined); | |
4366 | } | |
4367 | else | |
4368 | { | |
4369 | if (ctype_isVisiblySharable (t) | |
4370 | && sRef_isExternallyVisible (e->sref) | |
4371 | && !(ctype_isAbstract (t) | |
4372 | && context_hasAccess (ctype_typeId (t)))) | |
4373 | { | |
4374 | voptgenerror | |
4375 | (FLG_CASTEXPOSE, | |
4376 | message ("Cast to abstract type from externally visible " | |
4377 | "mutable storage exposes rep of %s: %s", | |
4378 | ctype_unparse (c), | |
4379 | exprNode_unparse (e)), | |
4380 | e->loc); | |
4381 | } | |
4382 | } | |
4383 | } | |
4384 | ||
4385 | return (ret); | |
4386 | } | |
4387 | ||
4388 | static bool | |
4389 | evaluationOrderUndefined (lltok op) | |
4390 | { | |
4391 | int opid = lltok_getTok (op); | |
4392 | ||
4393 | return (opid != AND_OP && opid != OR_OP); | |
4394 | } | |
4395 | ||
4396 | static bool checkIntegral (/*@notnull@*/ exprNode e1, | |
4397 | /*@notnull@*/ exprNode e2, | |
4398 | /*@notnull@*/ exprNode ret, | |
4399 | lltok op) | |
4400 | { | |
4401 | bool error = FALSE; | |
4402 | ||
4403 | ctype te1 = exprNode_getType (e1); | |
4404 | ctype te2 = exprNode_getType (e2); | |
4405 | ||
4406 | ctype tr1 = ctype_realishType (te1); | |
4407 | ctype tr2 = ctype_realishType (te2); | |
4408 | ||
4409 | if (ctype_isForceRealInt (&tr1) && ctype_isForceRealInt (&tr2)) | |
4410 | { | |
4411 | ; | |
4412 | } | |
4413 | else | |
4414 | { | |
4415 | if (context_msgStrictOps ()) | |
4416 | { | |
4417 | if (!ctype_isInt (tr1) && !ctype_isInt (tr2)) | |
4418 | { | |
4419 | if (ctype_sameName (te1, te2)) | |
4420 | { | |
4421 | error = optgenerror | |
4422 | (FLG_STRICTOPS, | |
4423 | message ("Operands of %s are non-integer (%t): %s", | |
4424 | lltok_unparse (op), te1, | |
4425 | exprNode_unparse (ret)), | |
4426 | e1->loc); | |
4427 | } | |
4428 | else | |
4429 | { | |
4430 | error = optgenerror | |
4431 | (FLG_STRICTOPS, | |
4432 | message ("Operands of %s are non-integers (%t, %t): %s", | |
4433 | lltok_unparse (op), te1, te2, | |
4434 | exprNode_unparse (ret)), | |
4435 | e1->loc); | |
4436 | } | |
4437 | } | |
4438 | else if (!ctype_isInt (tr1)) | |
4439 | { | |
4440 | error = optgenerror | |
4441 | (FLG_STRICTOPS, | |
4442 | message ("Left operand of %s is non-integer (%t): %s", | |
4443 | lltok_unparse (op), te1, exprNode_unparse (ret)), | |
4444 | e1->loc); | |
4445 | } | |
4446 | else | |
4447 | /* !ctype_isInt (te2) */ | |
4448 | { | |
4449 | error = optgenerror | |
4450 | (FLG_STRICTOPS, | |
4451 | message ("Right operand of %s is non-integer (%t): %s", | |
4452 | lltok_unparse (op), te2, exprNode_unparse (ret)), | |
4453 | e2->loc); | |
4454 | } | |
4455 | } | |
4456 | } | |
4457 | ||
4458 | return !error; | |
4459 | } | |
4460 | ||
4461 | /* | |
4462 | ** returns exprNode representing e1 op e2 | |
4463 | ** | |
4464 | ** uses msg if there are errors | |
4465 | ** can be used for both assignment ops and regular ops | |
4466 | ** | |
4467 | ** modifies e1 | |
4468 | */ | |
4469 | ||
4470 | static /*@only@*/ /*@notnull@*/ exprNode | |
4471 | exprNode_makeOp (/*@keep@*/ exprNode e1, /*@keep@*/ exprNode e2, | |
4472 | /*@keep@*/ lltok op) | |
4473 | { | |
4474 | ctype te1, te2, tr1, tr2, tret; | |
4475 | int opid = lltok_getTok (op); | |
4476 | bool hasError = FALSE; | |
4477 | exprNode ret; | |
4478 | ||
4479 | if (exprNode_isError (e1)) | |
4480 | { | |
4481 | ret = exprNode_createPartialNVCopy (e2); | |
4482 | } | |
4483 | else | |
4484 | { | |
4485 | ret = exprNode_createPartialNVCopy (e1); | |
4486 | } | |
4487 | ||
4488 | ret->val = multiVal_undefined; | |
4489 | ret->kind = XPR_OP; | |
4490 | ret->edata = exprData_makeOp (e1, e2, op); | |
4491 | ||
4492 | if (exprNode_isError (e1) || exprNode_isError (e2)) | |
4493 | { | |
4494 | if (opid == TLT || opid == TGT || opid == LE_OP || opid == GE_OP | |
4495 | || opid == EQ_OP || opid == NE_OP | |
4496 | || opid == AND_OP || opid == OR_OP) | |
4497 | { | |
4498 | ret->typ = ctype_bool; | |
4499 | } | |
4500 | ||
4501 | if (exprNode_isDefined (e1)) | |
4502 | { | |
4503 | exprNode_checkUse (ret, e1->sref, e1->loc); | |
4504 | } | |
4505 | ||
4506 | if (exprNode_isDefined (e2)) | |
4507 | { | |
4508 | exprNode_mergeUSs (ret, e2); | |
4509 | exprNode_checkUse (ret, e2->sref, e2->loc); | |
4510 | } | |
4511 | ||
4512 | return ret; | |
4513 | } | |
4514 | ||
4515 | tret = ctype_unknown; | |
4516 | te1 = exprNode_getType (e1); | |
4517 | DPRINTF (("te1 = %s / %s", exprNode_unparse (e1), ctype_unparse (te1))); | |
4518 | ||
4519 | te2 = exprNode_getType (e2); | |
4520 | ||
4521 | tr1 = ctype_realishType (te1); | |
4522 | tr2 = ctype_realishType (te2); | |
4523 | ||
4524 | if (opid == OR_OP) | |
4525 | { | |
4526 | ret->guards = guardSet_or (ret->guards, e2->guards); | |
4527 | } | |
4528 | else if (opid == AND_OP) | |
4529 | { | |
4530 | ret->guards = guardSet_and (ret->guards, e2->guards); | |
4531 | } | |
4532 | else | |
4533 | { | |
4534 | /* no guards */ | |
4535 | } | |
4536 | ||
4537 | if (opid == EQ_OP || opid == NE_OP) | |
4538 | { | |
4539 | exprNode temp1 = e1, temp2 = e2; | |
4540 | ||
4541 | /* could do NULL == x */ | |
4542 | ||
4543 | if (exprNode_isNullValue (e1) || exprNode_isUnknownConstant (e1)) | |
4544 | { | |
4545 | temp1 = e2; temp2 = e1; | |
4546 | } | |
4547 | ||
4548 | if (exprNode_isNullValue (temp2) || exprNode_isUnknownConstant (temp2)) | |
4549 | { | |
4550 | reflectNullTest (temp1, (opid == NE_OP)); | |
4551 | guardSet_free (ret->guards); | |
4552 | ret->guards = guardSet_copy (temp1->guards); | |
4553 | } | |
4554 | } | |
4555 | ||
4556 | if (opid == TLT || opid == TGT || opid == LE_OP || opid == GE_OP | |
4557 | || opid == EQ_OP || opid == NE_OP || opid == AND_OP || opid == OR_OP) | |
4558 | { | |
4559 | tret = ctype_bool; | |
4560 | } | |
4561 | ||
4562 | if (anyAbstract (tr1, tr2) && | |
4563 | (!((ctype_isRealBool (te1) || ctype_isRealBool (te2)) && | |
4564 | (opid == AND_OP || opid == OR_OP | |
4565 | || opid == EQ_OP || opid == NE_OP)))) | |
4566 | { | |
4567 | abstractOpError (tr1, tr2, op, e1, e2, e1->loc, e2->loc); | |
4568 | } | |
4569 | else if (ctype_isUnknown (te1) || ctype_isUnknown (te2)) | |
4570 | { | |
4571 | /* unknown types, no comparisons possible */ | |
4572 | } | |
4573 | else | |
4574 | { | |
4575 | switch (opid) | |
4576 | { | |
4577 | case TMULT: /* multiplication and division: */ | |
4578 | case TDIV: /* */ | |
4579 | case MUL_ASSIGN: /* numeric, numeric -> numeric */ | |
4580 | case DIV_ASSIGN: /* */ | |
4581 | ||
4582 | tret = checkNumerics (tr1, tr2, te1, te2, e1, e2, op); | |
4583 | break; | |
4584 | ||
4585 | case TPLUS: /* addition and subtraction: */ | |
4586 | case TMINUS: /* pointer, int -> pointer */ | |
4587 | case SUB_ASSIGN: /* int, pointer -> pointer */ | |
4588 | case ADD_ASSIGN: /* numeric, numeric -> numeric */ | |
4589 | ||
4590 | tr1 = ctype_fixArrayPtr (tr1); | |
4591 | ||
4592 | if ((ctype_isRealPointer (tr1) && !exprNode_isNullValue (e1)) | |
4593 | && (!ctype_isRealPointer (tr2) && ctype_isRealInt (tr2))) | |
4594 | { | |
4595 | /* pointer + int */ | |
4596 | ||
4597 | if (context_msgPointerArith ()) | |
4598 | { | |
4599 | voptgenerror | |
4600 | (FLG_POINTERARITH, | |
4601 | message ("Pointer arithmetic (%t, %t): %s", | |
4602 | te1, te2, exprNode_unparse (ret)), | |
4603 | e1->loc); | |
4604 | } | |
4605 | ||
4606 | if (sRef_possiblyNull (e1->sref) | |
4607 | && !usymtab_isGuarded (e1->sref)) | |
4608 | { | |
4609 | voptgenerror | |
4610 | (FLG_NULLPOINTERARITH, | |
4611 | message ("Pointer arithmetic involving possibly " | |
4612 | "null pointer %s: %s", | |
4613 | exprNode_unparse (e1), | |
4614 | exprNode_unparse (ret)), | |
4615 | e1->loc); | |
4616 | } | |
4617 | ||
4618 | ret->sref = sRef_copy (e1->sref); | |
4619 | ||
4620 | /* start modifications */ | |
4621 | /* added by Seejo on 4/16/2000 */ | |
4622 | ||
4623 | /* Arithmetic operations on pointers wil modify the size/len/null terminated | |
4624 | status */ | |
4625 | if ((sRef_isPossiblyNullTerminated (e1->sref)) || (sRef_isNullTerminated(e1->sref))) { | |
4626 | //if (sRef_isKnown (e->sref)) { | |
4627 | //ret->sref = sRef_makeAddress (e->sref); | |
4628 | //} | |
4629 | ||
4630 | int val; | |
4631 | /*drl 1-4-2001 | |
4632 | added ugly fixed to stop | |
4633 | program from crashing on point + int +int | |
4634 | one day I'll fix this or ask Seejo wtf the codes supposed to do. */ | |
4635 | ||
4636 | if (!multiVal_isInt (e2->val) ) | |
4637 | break; | |
4638 | /*end drl*/ | |
4639 | ||
4640 | val = (int) multiVal_forceInt (e2->val); | |
4641 | ||
4642 | /* Operator : + or += */ | |
4643 | if ((lltok_getTok (op) == TPLUS) || (lltok_getTok(op) == ADD_ASSIGN)) { | |
4644 | if (sRef_getSize(e1->sref) >= val) {/* Incrementing the pointer by | |
4645 | val should not result in a | |
4646 | size < 0 (size = 0 is ok !) */ | |
4647 | ||
4648 | sRef_setSize (ret->sref, sRef_getSize(e1->sref) - val); | |
4649 | ||
4650 | if (sRef_getLen(e1->sref) == val) { /* i.e. the character at posn val is \0 */ | |
4651 | sRef_setNotNullTerminatedState(ret->sref); | |
4652 | sRef_resetLen (ret->sref); | |
4653 | } else { | |
4654 | sRef_setNullTerminatedState(ret->sref); | |
4655 | sRef_setLen (ret->sref, sRef_getLen(e1->sref) - val); | |
4656 | } | |
4657 | } | |
4658 | } | |
4659 | ||
4660 | /* Operator : - or -= */ | |
4661 | if ((lltok_getTok (op) == TMINUS) || (lltok_getTok (op) == SUB_ASSIGN)) { | |
4662 | if (sRef_getSize(e1->sref) >= 0) { | |
4663 | sRef_setSize (ret->sref, sRef_getSize(e1->sref) + val); | |
4664 | sRef_setLen (ret->sref, sRef_getLen(e1->sref) + val); | |
4665 | } | |
4666 | } | |
4667 | } | |
4668 | ||
4669 | /* end modifications */ | |
4670 | ||
4671 | sRef_setNullError (ret->sref); | |
4672 | ||
4673 | /* | |
4674 | ** Fixed for 2.2c: the alias state of ptr + int is dependent, | |
4675 | ** since is points to storage that should not be deallocated | |
4676 | ** through this pointer. | |
4677 | */ | |
4678 | ||
4679 | if (sRef_isOnly (ret->sref) | |
4680 | || sRef_isFresh (ret->sref)) | |
4681 | { | |
4682 | sRef_setAliasKind (ret->sref, AK_DEPENDENT, exprNode_loc (ret)); | |
4683 | } | |
4684 | ||
4685 | tret = e1->typ; | |
4686 | } | |
4687 | else if ((!ctype_isRealPointer(tr1) && ctype_isRealInt (tr1)) | |
4688 | && (ctype_isRealPointer (tr2) && !exprNode_isNullValue (e2))) | |
4689 | { | |
4690 | if (context_msgPointerArith ()) | |
4691 | { | |
4692 | voptgenerror | |
4693 | (FLG_POINTERARITH, | |
4694 | message ("Pointer arithmetic (%t, %t): %s", | |
4695 | te1, te2, exprNode_unparse (ret)), | |
4696 | e1->loc); | |
4697 | } | |
4698 | ||
4699 | if (sRef_possiblyNull (e1->sref) | |
4700 | && !usymtab_isGuarded (e1->sref)) | |
4701 | { | |
4702 | voptgenerror | |
4703 | (FLG_NULLPOINTERARITH, | |
4704 | message ("Pointer arithmetic involving possibly " | |
4705 | "null pointer %s: %s", | |
4706 | exprNode_unparse (e2), | |
4707 | exprNode_unparse (ret)), | |
4708 | e2->loc); | |
4709 | } | |
4710 | ||
4711 | ret->sref = sRef_copy (e2->sref); | |
4712 | ||
4713 | /* start modifications */ | |
4714 | /* added by Seejo on 4/16/2000 */ | |
4715 | ||
4716 | /* Arithmetic operations on pointers wil modify the size/len/null terminated | |
4717 | status */ | |
4718 | ||
4719 | if ((sRef_isPossiblyNullTerminated (e2->sref)) || (sRef_isNullTerminated(e2->sref))) { | |
4720 | //if (sRef_isKnown (e->sref)) { | |
4721 | //ret->sref = sRef_makeAddress (e->sref); | |
4722 | //} | |
4723 | ||
4724 | int val = (int) multiVal_forceInt (e1->val); | |
4725 | ||
4726 | /* Operator : + or += */ | |
4727 | if ((lltok_getTok (op) == TPLUS) || (lltok_getTok(op) == ADD_ASSIGN)) { | |
4728 | if (sRef_getSize(e2->sref) >= val) {/* Incrementing the pointer by | |
4729 | val should not result in a | |
4730 | size < 0 (size = 0 is ok !) */ | |
4731 | ||
4732 | sRef_setSize (ret->sref, sRef_getSize(e2->sref) - val); | |
4733 | ||
4734 | if (sRef_getLen(e2->sref) == val) { /* i.e. the character at posn val is \0 */ | |
4735 | sRef_setNotNullTerminatedState(ret->sref); | |
4736 | sRef_resetLen (ret->sref); | |
4737 | } else { | |
4738 | sRef_setNullTerminatedState(ret->sref); | |
4739 | sRef_setLen (ret->sref, sRef_getLen(e2->sref) - val); | |
4740 | } | |
4741 | } | |
4742 | } | |
4743 | ||
4744 | /* Operator : - or -= */ | |
4745 | if ((lltok_getTok (op) == TMINUS) || (lltok_getTok (op) == SUB_ASSIGN)) { | |
4746 | if (sRef_getSize(e2->sref) >= 0) { | |
4747 | sRef_setSize (ret->sref, sRef_getSize(e2->sref) + val); | |
4748 | sRef_setLen (ret->sref, sRef_getLen(e2->sref) + val); | |
4749 | } | |
4750 | } | |
4751 | } | |
4752 | ||
4753 | /* end modifications */ | |
4754 | ||
4755 | sRef_setNullError (ret->sref); | |
4756 | ||
4757 | /* | |
4758 | ** Fixed for 2.2c: the alias state of ptr + int is dependent, | |
4759 | ** since is points to storage that should not be deallocated | |
4760 | ** through this pointer. | |
4761 | */ | |
4762 | ||
4763 | if (sRef_isOnly (ret->sref) | |
4764 | || sRef_isFresh (ret->sref)) { | |
4765 | sRef_setAliasKind (ret->sref, AK_DEPENDENT, exprNode_loc (ret)); | |
4766 | } | |
4767 | ||
4768 | tret = e2->typ; | |
4769 | ret->sref = e2->sref; | |
4770 | } | |
4771 | else | |
4772 | { | |
4773 | tret = checkNumerics (tr1, tr2, te1, te2, e1, e2, op); | |
4774 | } | |
4775 | ||
4776 | break; | |
4777 | ||
4778 | case LEFT_ASSIGN: /* Shifts: should be unsigned values */ | |
4779 | case RIGHT_ASSIGN: | |
4780 | case LEFT_OP: | |
4781 | case RIGHT_OP: | |
4782 | case TAMPERSAND: /* bitwise & */ | |
4783 | case AND_ASSIGN: | |
4784 | case TCIRC: /* ^ (XOR) */ | |
4785 | case TBAR: | |
4786 | case XOR_ASSIGN: | |
4787 | case OR_ASSIGN: | |
4788 | { | |
4789 | bool reported = FALSE; | |
4790 | flagcode code = FLG_BITWISEOPS; | |
4791 | ||
4792 | if (opid == LEFT_OP || opid == LEFT_ASSIGN | |
4793 | || opid == RIGHT_OP || opid == RIGHT_ASSIGN) { | |
4794 | code = FLG_SHIFTSIGNED; | |
4795 | } | |
4796 | ||
4797 | if (!ctype_isUnsigned (tr1)) | |
4798 | { | |
4799 | if (exprNode_isNonNegative (e1)) { | |
4800 | ; | |
4801 | } else { | |
4802 | reported = optgenerror | |
4803 | (code, | |
4804 | message ("Left operand of %s is not unsigned value (%t): %s", | |
4805 | lltok_unparse (op), te1, | |
4806 | exprNode_unparse (ret)), | |
4807 | e1->loc); | |
4808 | ||
4809 | if (reported) { | |
4810 | te1 = ctype_uint; | |
4811 | } | |
4812 | } | |
4813 | } | |
4814 | else | |
4815 | { | |
4816 | /* right need not be signed for shifts */ | |
4817 | if (code != FLG_SHIFTSIGNED | |
4818 | && !ctype_isUnsigned (tr2)) | |
4819 | { | |
4820 | if (!exprNode_isNonNegative (e2)) { | |
4821 | reported = optgenerror | |
4822 | (code, | |
4823 | message ("Right operand of %s is not unsigned value (%t): %s", | |
4824 | lltok_unparse (op), te2, | |
4825 | exprNode_unparse (ret)), | |
4826 | e2->loc); | |
4827 | } | |
4828 | } | |
4829 | } | |
4830 | ||
4831 | if (!reported) | |
4832 | { | |
4833 | if (!checkIntegral (e1, e2, ret, op)) { | |
4834 | te1 = ctype_unknown; | |
4835 | } | |
4836 | } | |
4837 | ||
4838 | DPRINTF (("Set: %s", ctype_unparse (te1))); | |
4839 | ||
4840 | /* | |
4841 | ** tret is the widest type of te1 and te2 | |
4842 | */ | |
4843 | ||
4844 | tret = ctype_widest (te1, te2); | |
4845 | break; | |
4846 | } | |
4847 | case MOD_ASSIGN: | |
4848 | case TPERCENT: | |
4849 | if (checkIntegral (e1, e2, ret, op)) { | |
4850 | tret = te1; | |
4851 | } else { | |
4852 | tret = ctype_unknown; | |
4853 | } | |
4854 | break; | |
4855 | case EQ_OP: | |
4856 | case NE_OP: | |
4857 | case TLT: /* comparisons */ | |
4858 | case TGT: /* numeric, numeric -> bool */ | |
4859 | if ((ctype_isReal (tr1) && !ctype_isInt (tr1)) | |
4860 | || (ctype_isReal (tr2) && !ctype_isInt (tr2))) | |
4861 | { | |
4862 | ctype rtype = tr1; | |
4863 | bool fepsilon = FALSE; | |
4864 | ||
4865 | if (!ctype_isReal (rtype) || ctype_isInt (rtype)) | |
4866 | { | |
4867 | rtype = tr2; | |
4868 | } | |
4869 | ||
4870 | if (opid == TLT || opid == TGT) | |
4871 | { | |
4872 | uentry ue1 = exprNode_getUentry (e1); | |
4873 | uentry ue2 = exprNode_getUentry (e2); | |
4874 | ||
4875 | /* | |
4876 | ** FLT_EPSILON, etc. really is a variable, not | |
4877 | ** a constant. | |
4878 | */ | |
4879 | ||
4880 | if (uentry_isVariable (ue1)) | |
4881 | { | |
4882 | cstring uname = uentry_rawName (ue1); | |
4883 | ||
4884 | if (cstring_equalLit (uname, "FLT_EPSILON") | |
4885 | || cstring_equalLit (uname, "DBL_EPSILON") | |
4886 | || cstring_equalLit (uname, "LDBL_EPSILON")) | |
4887 | { | |
4888 | fepsilon = TRUE; | |
4889 | } | |
4890 | } | |
4891 | ||
4892 | if (uentry_isVariable (ue2)) | |
4893 | { | |
4894 | cstring uname = uentry_rawName (ue2); | |
4895 | ||
4896 | if (cstring_equalLit (uname, "FLT_EPSILON") | |
4897 | || cstring_equalLit (uname, "DBL_EPSILON") | |
4898 | || cstring_equalLit (uname, "LDBL_EPSILON")) | |
4899 | { | |
4900 | fepsilon = TRUE; | |
4901 | } | |
4902 | } | |
4903 | } | |
4904 | ||
4905 | if (fepsilon) | |
4906 | { | |
4907 | ; /* Don't complain. */ | |
4908 | } | |
4909 | else | |
4910 | { | |
4911 | voptgenerror | |
4912 | (FLG_REALCOMPARE, | |
4913 | message ("Dangerous comparison involving %s types: %s", | |
4914 | ctype_unparse (rtype), | |
4915 | exprNode_unparse (ret)), | |
4916 | ret->loc); | |
4917 | } | |
4918 | } | |
4919 | /*@fallthrough@*/ | |
4920 | case LE_OP: | |
4921 | case GE_OP: | |
4922 | ||
4923 | /* | |
4924 | ** Types should match. | |
4925 | */ | |
4926 | ||
4927 | if (!exprNode_matchTypes (e1, e2)) | |
4928 | { | |
4929 | hasError = gentypeerror | |
4930 | (te1, e1, te2, e2, | |
4931 | message ("Operands of %s have incompatible types (%t, %t): %s", | |
4932 | lltok_unparse (op), te1, te2, exprNode_unparse (ret)), | |
4933 | e1->loc); | |
4934 | ||
4935 | } | |
4936 | ||
4937 | if (hasError | |
4938 | || (ctype_isForceRealNumeric (&tr1) | |
4939 | && ctype_isForceRealNumeric (&tr2)) || | |
4940 | (ctype_isRealPointer (tr1) && ctype_isRealPointer (tr2))) | |
4941 | { | |
4942 | ; /* okay */ | |
4943 | } | |
4944 | else | |
4945 | { | |
4946 | if ((ctype_isRealNumeric (tr1) && ctype_isRealPointer (tr2)) || | |
4947 | (ctype_isRealPointer (tr1) && ctype_isRealNumeric (tr2))) | |
4948 | { | |
4949 | voptgenerror | |
4950 | (FLG_PTRNUMCOMPARE, | |
4951 | message ("Comparison of pointer and numeric (%t, %t): %s", | |
4952 | te1, te2, exprNode_unparse (ret)), | |
4953 | e1->loc); | |
4954 | } | |
4955 | else | |
4956 | { | |
4957 | (void) checkNumerics (tr1, tr2, te1, te2, e1, e2, op); | |
4958 | } | |
4959 | tret = ctype_bool; | |
4960 | } | |
4961 | ||
4962 | /* EQ_OP should NOT be used with booleans (unless one is FALSE) */ | |
4963 | ||
4964 | if ((opid == EQ_OP || opid == NE_OP) && | |
4965 | ctype_isDirectBool (tr1) && ctype_isDirectBool (tr2)) | |
4966 | { | |
4967 | /* | |
4968 | ** is one a variable? | |
4969 | */ | |
4970 | ||
4971 | if (uentry_isVariable (exprNode_getUentry (e1)) | |
4972 | || uentry_isVariable (exprNode_getUentry (e2))) | |
4973 | { | |
4974 | /* | |
4975 | ** comparisons with FALSE are okay | |
4976 | */ | |
4977 | ||
4978 | if (exprNode_isFalseConstant (e1) | |
4979 | || exprNode_isFalseConstant (e2)) | |
4980 | { | |
4981 | ; | |
4982 | } | |
4983 | else | |
4984 | { | |
4985 | voptgenerror | |
4986 | (FLG_BOOLCOMPARE, | |
4987 | message | |
4988 | ("Use of %q with %s variables (risks inconsistency because " | |
4989 | "of multiple true values): %s", | |
4990 | cstring_makeLiteral ((opid == EQ_OP) ? "==" : "!="), | |
4991 | context_printBoolName (), exprNode_unparse (ret)), | |
4992 | e1->loc); | |
4993 | } | |
4994 | } | |
4995 | } | |
4996 | break; | |
4997 | ||
4998 | case AND_OP: /* bool, bool -> bool */ | |
4999 | case OR_OP: | |
5000 | ||
5001 | if (ctype_isForceRealBool (&tr1) && ctype_isForceRealBool (&tr2)) | |
5002 | { | |
5003 | ; | |
5004 | } | |
5005 | else | |
5006 | { | |
5007 | if (context_maybeSet (FLG_BOOLOPS)) | |
5008 | { | |
5009 | if (!ctype_isRealBool (te1) && !ctype_isRealBool (te2)) | |
5010 | { | |
5011 | if (ctype_sameName (te1, te2)) | |
5012 | { | |
5013 | voptgenerror | |
5014 | (FLG_BOOLOPS, | |
5015 | message ("Operands of %s are non-boolean (%t): %s", | |
5016 | lltok_unparse (op), te1, | |
5017 | exprNode_unparse (ret)), | |
5018 | e1->loc); | |
5019 | } | |
5020 | else | |
5021 | { | |
5022 | voptgenerror | |
5023 | (FLG_BOOLOPS, | |
5024 | message | |
5025 | ("Operands of %s are non-booleans (%t, %t): %s", | |
5026 | lltok_unparse (op), te1, te2, exprNode_unparse (ret)), | |
5027 | e1->loc); | |
5028 | } | |
5029 | } | |
5030 | else if (!ctype_isRealBool (te1)) | |
5031 | { | |
5032 | voptgenerror | |
5033 | (FLG_BOOLOPS, | |
5034 | message ("Left operand of %s is non-boolean (%t): %s", | |
5035 | lltok_unparse (op), te1, exprNode_unparse (ret)), | |
5036 | e1->loc); | |
5037 | } | |
5038 | else if (!ctype_isRealBool (te2)) | |
5039 | { | |
5040 | voptgenerror | |
5041 | (FLG_BOOLOPS, | |
5042 | message ("Right operand of %s is non-boolean (%t): %s", | |
5043 | lltok_unparse (op), te2, exprNode_unparse (ret)), | |
5044 | e2->loc); | |
5045 | } | |
5046 | else | |
5047 | { | |
5048 | ; | |
5049 | } | |
5050 | } | |
5051 | tret = ctype_bool; | |
5052 | } | |
5053 | break; | |
5054 | default: { | |
5055 | llfatalbug | |
5056 | (cstring_makeLiteral | |
5057 | ("There has been a problem in the parser. This is due to a bug " | |
5058 | "in either lclint, bison or gcc version 2.95 optimizations, " | |
5059 | "but it has not been confirmed. Please try rebuidling LCLint " | |
5060 | "without the -O<n> option.")); | |
5061 | } | |
5062 | } | |
5063 | } | |
5064 | ||
5065 | DPRINTF (("Return type: %s", ctype_unparse (tret))); | |
5066 | ret->typ = tret; | |
5067 | ||
5068 | exprNode_checkUse (ret, e1->sref, e1->loc); | |
5069 | exprNode_mergeUSs (ret, e2); | |
5070 | exprNode_checkUse (ret, e2->sref, e2->loc); | |
5071 | ||
5072 | return ret; | |
5073 | } | |
5074 | ||
5075 | /*@only@*/ exprNode | |
5076 | exprNode_op (/*@only@*/ exprNode e1, /*@keep@*/ exprNode e2, | |
5077 | /*@only@*/ lltok op) | |
5078 | { | |
5079 | exprNode ret; | |
5080 | ||
5081 | checkMacroParen (e1); | |
5082 | checkMacroParen (e2); | |
5083 | ||
5084 | if (evaluationOrderUndefined (op) && context_maybeSet (FLG_EVALORDER)) | |
5085 | { | |
5086 | checkExpressionDefined (e1, e2, op); | |
5087 | } | |
5088 | ||
5089 | ret = exprNode_makeOp (e1, e2, op); | |
5090 | return (ret); | |
5091 | } | |
5092 | ||
5093 | static | |
5094 | void exprNode_checkAssignMod (exprNode e1, exprNode ret) | |
5095 | { | |
5096 | /* | |
5097 | ** This is somewhat bogus! | |
5098 | ** | |
5099 | ** Assigning to a nested observer in a non-observer datatype | |
5100 | ** should not produce an error. | |
5101 | */ | |
5102 | ||
5103 | sRef ref = exprNode_getSref (e1); | |
5104 | ||
5105 | DPRINTF (("Check assign mod: %s", | |
5106 | sRef_unparseFull (ref))); | |
5107 | ||
5108 | if (sRef_isObserver (ref) | |
5109 | || ((sRef_isFileStatic (ref) || sRef_isGlobal (ref)) | |
5110 | && ctype_isArray (ctype_realType (sRef_getType (ref))))) | |
5111 | { | |
5112 | sRef base = sRef_getBase (ref); | |
5113 | ||
5114 | if (sRef_isValid (base) && sRef_isObserver (base)) | |
5115 | { | |
5116 | exprNode_checkModify (e1, ret); | |
5117 | } | |
5118 | else | |
5119 | { | |
5120 | exprNode_checkModifyVal (e1, ret); | |
5121 | } | |
5122 | } | |
5123 | else | |
5124 | { | |
5125 | exprNode_checkModify (e1, ret); | |
5126 | } | |
5127 | } | |
5128 | ||
5129 | exprNode | |
5130 | exprNode_assign (/*@only@*/ exprNode e1, | |
5131 | /*@only@*/ exprNode e2, /*@only@*/ lltok op) | |
5132 | { | |
5133 | bool isalloc = FALSE; | |
5134 | bool isjustalloc = FALSE; | |
5135 | exprNode ret; | |
5136 | ||
5137 | DPRINTF (("%s [%s] <- %s [%s]", | |
5138 | exprNode_unparse (e1), | |
5139 | ctype_unparse (e1->typ), | |
5140 | exprNode_unparse (e2), | |
5141 | ctype_unparse (e2->typ))); | |
5142 | ||
5143 | if (lltok_getTok (op) != TASSIGN) | |
5144 | { | |
5145 | ret = exprNode_makeOp (e1, e2, op); | |
5146 | } | |
5147 | else | |
5148 | { | |
5149 | ret = exprNode_createPartialCopy (e1); | |
5150 | ret->kind = XPR_ASSIGN; | |
5151 | ret->edata = exprData_makeOp (e1, e2, op); | |
5152 | ||
5153 | if (!exprNode_isError (e2)) | |
5154 | { | |
5155 | ret->sets = sRefSet_union (ret->sets, e2->sets); | |
5156 | ret->msets = sRefSet_union (ret->msets, e2->msets); | |
5157 | ret->uses = sRefSet_union (ret->uses, e2->uses); | |
5158 | } | |
5159 | } | |
5160 | ||
5161 | checkExpressionDefined (e1, e2, op); | |
5162 | ||
5163 | if (exprNode_isError (e1)) | |
5164 | { | |
5165 | if (!exprNode_isError (e2)) | |
5166 | { | |
5167 | ret->loc = fileloc_update (ret->loc, e2->loc); | |
5168 | } | |
5169 | else | |
5170 | { | |
5171 | ret->loc = fileloc_update (ret->loc, g_currentloc); | |
5172 | } | |
5173 | } | |
5174 | ||
5175 | if (!exprNode_isError (e2)) | |
5176 | { | |
5177 | checkMacroParen (e2); | |
5178 | } | |
5179 | ||
5180 | if (exprNode_isDefined (e1)) | |
5181 | { | |
5182 | if (sRef_isMacroParamRef (e1->sref)) | |
5183 | { | |
5184 | if (context_inIterDef ()) | |
5185 | { | |
5186 | uentry ue = sRef_getUentry (e1->sref); | |
5187 | ||
5188 | if (uentry_isYield (ue)) | |
5189 | { | |
5190 | ; | |
5191 | } | |
5192 | else | |
5193 | { | |
5194 | if (fileloc_isDefined (e1->loc)) | |
5195 | { | |
5196 | voptgenerror | |
5197 | (FLG_MACROPARAMS, | |
5198 | message ("Assignment to non-yield iter parameter: %q", | |
5199 | sRef_unparse (e1->sref)), | |
5200 | e1->loc); | |
5201 | } | |
5202 | else | |
5203 | { | |
5204 | voptgenerror | |
5205 | (FLG_MACROPARAMS, | |
5206 | message ("Assignment to non-yield iter parameter: %q", | |
5207 | sRef_unparse (e1->sref)), | |
5208 | g_currentloc); | |
5209 | } | |
5210 | } | |
5211 | } | |
5212 | else | |
5213 | { | |
5214 | if (fileloc_isDefined (e1->loc)) | |
5215 | { | |
5216 | voptgenerror | |
5217 | (FLG_MACROASSIGN, | |
5218 | message ("Assignment to macro parameter: %q", | |
5219 | sRef_unparse (e1->sref)), | |
5220 | e1->loc); | |
5221 | } | |
5222 | else | |
5223 | { | |
5224 | voptgenerror | |
5225 | (FLG_MACROASSIGN, | |
5226 | message ("Assignment to macro parameter: %q", | |
5227 | sRef_unparse (e1->sref)), | |
5228 | g_currentloc); | |
5229 | } | |
5230 | } | |
5231 | } | |
5232 | else | |
5233 | { | |
5234 | exprNode_checkAssignMod (e1, ret); | |
5235 | } | |
5236 | ||
5237 | if (exprNode_isDefined (e2)) | |
5238 | { | |
5239 | if (lltok_getTok (op) == TASSIGN) | |
5240 | { | |
5241 | ctype te1 = exprNode_getType (e1); | |
5242 | ctype te2 = exprNode_getType (e2); | |
5243 | ||
5244 | if (!ctype_forceMatch (te1, te2)) | |
5245 | { | |
5246 | if (exprNode_matchLiteral (te1, e2)) | |
5247 | { | |
5248 | ; | |
5249 | } | |
5250 | else | |
5251 | { | |
5252 | (void) gentypeerror | |
5253 | (te2, e2, te1, e1, | |
5254 | message ("Assignment of %t to %t: %s %s %s", | |
5255 | te2, te1, exprNode_unparse (e1), | |
5256 | lltok_unparse (op), | |
5257 | exprNode_unparse (e2)), | |
5258 | e1->loc); | |
5259 | } | |
5260 | } | |
5261 | } | |
5262 | ||
5263 | exprNode_mergeUSs (ret, e2); | |
5264 | exprNode_checkUse (ret, e2->sref, e2->loc); | |
5265 | ||
5266 | doAssign (e1, e2, FALSE); | |
5267 | ret->sref = e1->sref; | |
5268 | } | |
5269 | else | |
5270 | { | |
5271 | if (exprNode_isDefined (e2)) | |
5272 | { | |
5273 | exprNode_mergeUSs (ret, e2); | |
5274 | exprNode_checkUse (ret, e2->sref, e2->loc); | |
5275 | } | |
5276 | } | |
5277 | ||
5278 | if (sRef_isPointer (e1->sref) && !sRef_isMacroParamRef (e1->sref)) | |
5279 | { | |
5280 | exprNode_checkUse (ret, sRef_getBase (e1->sref), e1->loc); | |
5281 | } | |
5282 | ||
5283 | isjustalloc = sRef_isJustAllocated (e1->sref); | |
5284 | isalloc = sRef_isAllocated (e1->sref); | |
5285 | ||
5286 | if (sRef_isField (e1->sref)) | |
5287 | { | |
5288 | sRef root = sRef_getRootBase (sRef_getBase (e1->sref)); | |
5289 | ||
5290 | if (!sRef_isAllocated (root) && !sRef_isMacroParamRef (root)) | |
5291 | { | |
5292 | exprNode_checkUse (ret, root, e1->loc); | |
5293 | } | |
5294 | ||
5295 | } | |
5296 | ||
5297 | /* | |
5298 | ** be careful! this defines e1->sref. | |
5299 | */ | |
5300 | ||
5301 | if (!sRef_isMacroParamRef (e1->sref)) | |
5302 | { | |
5303 | exprNode_checkSet (ret, e1->sref); | |
5304 | } | |
5305 | ||
5306 | if (isjustalloc) | |
5307 | { | |
5308 | sRef_setAllocatedComplete (e1->sref, exprNode_isDefined (e2) | |
5309 | ? e2->loc : e1->loc); | |
5310 | } | |
5311 | else | |
5312 | { | |
5313 | if (isalloc) | |
5314 | { | |
5315 | sRef_setAllocatedShallowComplete (e1->sref, exprNode_loc (e2)); | |
5316 | } | |
5317 | } | |
5318 | } | |
5319 | ||
5320 | return ret; | |
5321 | } | |
5322 | ||
5323 | exprNode | |
5324 | exprNode_cond (/*@keep@*/ exprNode pred, /*@keep@*/ exprNode ifclause, | |
5325 | /*@keep@*/ exprNode elseclause) | |
5326 | { | |
5327 | exprNode ret; | |
5328 | ||
5329 | if (!exprNode_isError (pred)) | |
5330 | { | |
5331 | ret = exprNode_createPartialCopy (pred); | |
5332 | checkMacroParen (pred); | |
5333 | exprNode_checkPred (cstring_makeLiteralTemp ("conditional"), pred); | |
5334 | ||
5335 | if (!exprNode_isError (ifclause)) | |
5336 | { | |
5337 | checkMacroParen (ifclause); /* update macro counts! */ | |
5338 | ||
5339 | if (!exprNode_isError (elseclause)) | |
5340 | { | |
5341 | checkMacroParen (elseclause); | |
5342 | ||
5343 | if (!exprNode_matchTypes (ifclause, elseclause)) | |
5344 | { | |
5345 | if (gentypeerror | |
5346 | (exprNode_getType (ifclause), | |
5347 | ifclause, | |
5348 | exprNode_getType (elseclause), | |
5349 | elseclause, | |
5350 | message ("Conditional clauses are not of same type: " | |
5351 | "%s (%t), %s (%t)", | |
5352 | exprNode_unparse (ifclause), | |
5353 | exprNode_getType (ifclause), | |
5354 | exprNode_unparse (elseclause), | |
5355 | exprNode_getType (elseclause)), | |
5356 | ifclause->loc)) | |
5357 | { | |
5358 | ret->sref = sRef_undefined; | |
5359 | ret->typ = ctype_unknown; | |
5360 | } | |
5361 | } | |
5362 | else | |
5363 | { | |
5364 | /* for now...should merge the states */ | |
5365 | ret->sref = ifclause->sref; | |
5366 | ret->typ = ifclause->typ; | |
5367 | ||
5368 | if (exprNode_isNullValue (ifclause)) | |
5369 | { | |
5370 | ret->typ = elseclause->typ; | |
5371 | } | |
5372 | } | |
5373 | ||
5374 | exprNode_checkUse (ret, pred->sref, pred->loc); | |
5375 | exprNode_checkUse (ifclause, ifclause->sref, ifclause->loc); | |
5376 | exprNode_checkUse (elseclause, elseclause->sref, elseclause->loc); | |
5377 | ||
5378 | exprNode_mergeCondUSs (ret, ifclause, elseclause); | |
5379 | ||
5380 | } | |
5381 | else | |
5382 | { | |
5383 | ret->typ = ifclause->typ; | |
5384 | ||
5385 | exprNode_checkUse (pred, pred->sref, pred->loc); | |
5386 | exprNode_checkUse (ifclause, ifclause->sref, ifclause->loc); | |
5387 | ||
5388 | exprNode_mergeCondUSs (ret, ifclause, exprNode_undefined); | |
5389 | } | |
5390 | } | |
5391 | else | |
5392 | { | |
5393 | if (!exprNode_isError (elseclause)) | |
5394 | { | |
5395 | ret->typ = elseclause->typ; | |
5396 | ||
5397 | exprNode_checkUse (pred, pred->sref, pred->loc); | |
5398 | exprNode_checkUse (elseclause, elseclause->sref, elseclause->loc); | |
5399 | ||
5400 | exprNode_mergeCondUSs (ret, exprNode_undefined, elseclause); | |
5401 | } | |
5402 | } | |
5403 | } | |
5404 | else /* pred is error */ | |
5405 | { | |
5406 | if (!exprNode_isError (ifclause)) | |
5407 | { | |
5408 | ret = exprNode_createSemiCopy (ifclause); | |
5409 | ||
5410 | checkMacroParen (ifclause); /* update macro counts! */ | |
5411 | ||
5412 | if (!exprNode_isError (elseclause)) | |
5413 | { | |
5414 | checkMacroParen (elseclause); | |
5415 | ||
5416 | ret->typ = ifclause->typ; | |
5417 | ||
5418 | if (!ctype_forceMatch (ifclause->typ, elseclause->typ)) | |
5419 | { | |
5420 | if (gentypeerror | |
5421 | (exprNode_getType (ifclause), | |
5422 | ifclause, | |
5423 | exprNode_getType (elseclause), | |
5424 | elseclause, | |
5425 | message ("Conditional clauses are not of same type: " | |
5426 | "%s (%t), %s (%t)", | |
5427 | exprNode_unparse (ifclause), | |
5428 | exprNode_getType (ifclause), | |
5429 | exprNode_unparse (elseclause), | |
5430 | exprNode_getType (elseclause)), | |
5431 | ifclause->loc)) | |
5432 | { | |
5433 | ret->typ = ctype_unknown; | |
5434 | } | |
5435 | } | |
5436 | ||
5437 | exprNode_checkUse (ifclause, ifclause->sref, ifclause->loc); | |
5438 | exprNode_checkUse (elseclause, elseclause->sref, elseclause->loc); | |
5439 | ||
5440 | exprNode_mergeCondUSs (ret, ifclause, elseclause); | |
5441 | } | |
5442 | } | |
5443 | else if (!exprNode_isError (elseclause)) /* pred, if errors */ | |
5444 | { | |
5445 | ret = exprNode_createSemiCopy (ifclause); | |
5446 | ||
5447 | ret->typ = elseclause->typ; | |
5448 | checkMacroParen (elseclause); | |
5449 | ||
5450 | exprNode_checkUse (elseclause, elseclause->sref, elseclause->loc); | |
5451 | exprNode_mergeCondUSs (ret, exprNode_undefined, elseclause); | |
5452 | } | |
5453 | else /* all errors! */ | |
5454 | { | |
5455 | ret = exprNode_createLoc (ctype_unknown, g_currentloc); | |
5456 | } | |
5457 | } | |
5458 | ||
5459 | ret->kind = XPR_COND; | |
5460 | ret->edata = exprData_makeCond (pred, ifclause, elseclause); | |
5461 | ||
5462 | if (exprNode_isDefined (ifclause) && exprNode_isDefined (elseclause)) | |
5463 | { | |
5464 | exprNode_combineControl (ret, ifclause, elseclause); | |
5465 | } | |
5466 | ||
5467 | return (ret); | |
5468 | } | |
5469 | ||
5470 | exprNode | |
5471 | exprNode_vaArg (/*@only@*/ lltok tok, /*@only@*/ exprNode arg, /*@only@*/ qtype qt) | |
5472 | { | |
5473 | ctype totype = qtype_getType (qt); | |
5474 | exprNode ret = | |
5475 | exprNode_createPartialLocCopy (arg, fileloc_copy (lltok_getLoc (tok))); | |
5476 | ctype targ; | |
5477 | ||
5478 | /* | |
5479 | ** check use of va_arg : <valist>, type -> type | |
5480 | */ | |
5481 | ||
5482 | if (exprNode_isError (arg)) | |
5483 | { | |
5484 | } | |
5485 | else | |
5486 | { | |
5487 | targ = exprNode_getType (arg); | |
5488 | ||
5489 | /* | |
5490 | ** arg should have be a pointer | |
5491 | */ | |
5492 | ||
5493 | if (!ctype_isUA (targ) || | |
5494 | (!usymId_equal (ctype_typeId (targ), | |
5495 | usymtab_getTypeId (cstring_makeLiteralTemp ("va_list"))))) | |
5496 | { | |
5497 | voptgenerror | |
5498 | (FLG_TYPE, | |
5499 | message ("First argument to va_arg is not a va_list (type %t): %s", | |
5500 | targ, exprNode_unparse (arg)), | |
5501 | arg->loc); | |
5502 | } | |
5503 | ||
5504 | exprNode_checkSet (ret, arg->sref); | |
5505 | } | |
5506 | ||
5507 | /* | |
5508 | ** return type is totype | |
5509 | */ | |
5510 | ||
5511 | ret->typ = totype; | |
5512 | ret->kind = XPR_VAARG; | |
5513 | ret->edata = exprData_makeCast (tok, arg, qt); | |
5514 | ||
5515 | return (ret); | |
5516 | } | |
5517 | ||
5518 | exprNode exprNode_labelMarker (/*@only@*/ cstring label) | |
5519 | { | |
5520 | exprNode ret = exprNode_createPlain (ctype_undefined); | |
5521 | ret->kind = XPR_LABEL; | |
5522 | ret->edata = exprData_makeLiteral (label); | |
5523 | ret->isJumpPoint = TRUE; | |
5524 | ||
5525 | return (ret); /* for now, ignore label */ | |
5526 | } | |
5527 | ||
5528 | exprNode exprNode_notReached (/*@returned@*/ exprNode stmt) | |
5529 | { | |
5530 | if (exprNode_isDefined (stmt)) | |
5531 | { | |
5532 | stmt->isJumpPoint = TRUE; | |
5533 | ||
5534 | /* This prevent stray no return path errors, etc. */ | |
5535 | stmt->exitCode = XK_MUSTEXIT; | |
5536 | } | |
5537 | ||
5538 | return (stmt); | |
5539 | } | |
5540 | ||
5541 | bool exprNode_isDefaultMarker (exprNode e) | |
5542 | { | |
5543 | if (exprNode_isDefined (e)) | |
5544 | { | |
5545 | return (e->kind == XPR_DEFAULT || e->kind == XPR_FTDEFAULT); | |
5546 | } | |
5547 | ||
5548 | return FALSE; | |
5549 | } | |
5550 | ||
5551 | bool exprNode_isCaseMarker (exprNode e) | |
5552 | { | |
5553 | if (exprNode_isDefined (e)) | |
5554 | { | |
5555 | return (e->kind == XPR_FTCASE || e->kind == XPR_CASE); | |
5556 | } | |
5557 | ||
5558 | return FALSE; | |
5559 | } | |
5560 | ||
5561 | bool exprNode_isLabelMarker (exprNode e) | |
5562 | { | |
5563 | if (exprNode_isDefined (e)) | |
5564 | { | |
5565 | return (e->kind == XPR_LABEL); | |
5566 | } | |
5567 | ||
5568 | return FALSE; | |
5569 | } | |
5570 | ||
5571 | exprNode exprNode_caseMarker (/*@only@*/ exprNode test, bool fallThrough) | |
5572 | { | |
5573 | exprNode ret = exprNode_createPartialCopy (test); | |
5574 | ||
5575 | ret->kind = fallThrough ? XPR_FTCASE : XPR_CASE; | |
5576 | ||
5577 | if (exprNode_isError (test)) { | |
5578 | return ret; | |
5579 | } | |
5580 | ||
5581 | exprNode_checkUse (ret, test->sref, test->loc); | |
5582 | ||
5583 | usymtab_setExitCode (ret->exitCode); | |
5584 | ||
5585 | if (ret->mustBreak) | |
5586 | { | |
5587 | usymtab_setMustBreak (); | |
5588 | } | |
5589 | ||
5590 | ret->edata = exprData_makeSingle (test); | |
5591 | ret->isJumpPoint = TRUE; | |
5592 | ||
5593 | return ret; | |
5594 | } | |
5595 | ||
5596 | # if 0 | |
5597 | exprNode exprNode_caseStatement (/*@only@*/ exprNode test, /*@only@*/ exprNode stmt, bool fallThrough) | |
5598 | { | |
5599 | exprNode ret = exprNode_createPartialCopy (test); | |
5600 | ||
5601 | ret->kind = fallThrough ? XPR_FTCASE : XPR_CASE; | |
5602 | ret->edata = exprData_makePair (test, stmt); | |
5603 | ret->isJumpPoint = TRUE; | |
5604 | ||
5605 | if (exprNode_isError (test)) | |
5606 | { | |
5607 | return ret; | |
5608 | } | |
5609 | ||
5610 | exprNode_checkUse (ret, test->sref, test->loc); | |
5611 | ||
5612 | if (exprNode_isError (stmt)) | |
5613 | { | |
5614 | return ret; | |
5615 | } | |
5616 | ||
5617 | exprNode_mergeUSs (ret, stmt); | |
5618 | ||
5619 | ret->exitCode = stmt->exitCode; | |
5620 | ret->mustBreak = stmt->mustBreak; | |
5621 | ret->canBreak = stmt->canBreak; | |
5622 | ||
5623 | usymtab_setExitCode (ret->exitCode); | |
5624 | ||
5625 | if (ret->mustBreak) | |
5626 | { | |
5627 | usymtab_setMustBreak (); | |
5628 | } | |
5629 | ||
5630 | return ret; | |
5631 | } | |
5632 | # endif | |
5633 | ||
5634 | /*@notnull@*/ /*@only@*/ exprNode | |
5635 | exprNode_defaultMarker (/*@only@*/ lltok def, bool fallThrough) | |
5636 | { | |
5637 | exprNode ret = exprNode_createTok (def); | |
5638 | ||
5639 | ret->isJumpPoint = TRUE; | |
5640 | ret->kind = fallThrough ? XPR_FTDEFAULT : XPR_DEFAULT; | |
5641 | return (ret); | |
5642 | } | |
5643 | ||
5644 | bool | |
5645 | exprNode_mayEscape (exprNode e) | |
5646 | { | |
5647 | if (exprNode_isDefined (e)) | |
5648 | { | |
5649 | return exitkind_couldEscape (e->exitCode); | |
5650 | } | |
5651 | return FALSE; | |
5652 | } | |
5653 | ||
5654 | static bool | |
5655 | exprNode_mustBreak (exprNode e) | |
5656 | { | |
5657 | if (exprNode_isDefined (e)) | |
5658 | { | |
5659 | return e->mustBreak; | |
5660 | } | |
5661 | return FALSE; | |
5662 | } | |
5663 | ||
5664 | bool | |
5665 | exprNode_mustEscape (exprNode e) | |
5666 | { | |
5667 | if (exprNode_isDefined (e)) | |
5668 | { | |
5669 | return exitkind_mustEscape (e->exitCode) || exprNode_mustBreak (e); | |
5670 | } | |
5671 | ||
5672 | return FALSE; | |
5673 | } | |
5674 | ||
5675 | bool | |
5676 | exprNode_errorEscape (exprNode e) | |
5677 | { | |
5678 | if (exprNode_isDefined (e)) | |
5679 | { | |
5680 | return exitkind_isError (e->exitCode); | |
5681 | } | |
5682 | ||
5683 | return FALSE; | |
5684 | } | |
5685 | ||
5686 | exprNode exprNode_concat (/*@only@*/ exprNode e1, /*@only@*/ exprNode e2) | |
5687 | { | |
5688 | exprNode ret = exprNode_createPartialCopy (e1); | |
5689 | ||
5690 | ret->edata = exprData_makePair (e1, e2); | |
5691 | ret->kind = XPR_STMTLIST; | |
5692 | ||
5693 | if (exprNode_isDefined (e1)) | |
5694 | { | |
5695 | ret->isJumpPoint = e1->isJumpPoint; | |
5696 | ret->canBreak = e1->canBreak; | |
5697 | } | |
5698 | else | |
5699 | { | |
5700 | if (exprNode_isDefined (e2)) | |
5701 | { | |
5702 | ret->loc = fileloc_update (ret->loc, e2->loc); | |
5703 | } | |
5704 | } | |
5705 | ||
5706 | if (exprNode_isDefined (e2)) | |
5707 | { | |
5708 | ret->exitCode = e2->exitCode; | |
5709 | ret->mustBreak = e2->mustBreak; | |
5710 | if (e2->canBreak) ret->canBreak = TRUE; | |
5711 | } | |
5712 | ||
5713 | /* | |
5714 | ** if e1 must return, then e2 is unreachable! | |
5715 | */ | |
5716 | ||
5717 | if (exprNode_isDefined (e1) && exprNode_isDefined (e2)) | |
5718 | { | |
5719 | if ((exprNode_mustEscape (e1) || exprNode_mustBreak (e1)) | |
5720 | && !(e2->isJumpPoint)) | |
5721 | { | |
5722 | if (context_getFlag (FLG_UNREACHABLE)) | |
5723 | { | |
5724 | exprNode nr = e2; | |
5725 | ||
5726 | if (e2->kind == XPR_STMT) | |
5727 | { | |
5728 | nr = exprData_getUopNode (e2->edata); | |
5729 | } | |
5730 | ||
5731 | if ((nr->kind == XPR_TOK | |
5732 | && lltok_isSemi (exprData_getTok (nr->edata)))) | |
5733 | { | |
5734 | /* okay to have unreachable ";" */ | |
5735 | ret->exitCode = XK_MUSTEXIT; | |
5736 | ret->canBreak = TRUE; | |
5737 | } | |
5738 | else | |
5739 | { | |
5740 | if (optgenerror (FLG_UNREACHABLE, | |
5741 | message ("Unreachable code: %s", | |
5742 | exprNode_unparseFirst (nr)), | |
5743 | exprNode_loc (nr))) | |
5744 | { | |
5745 | ret->isJumpPoint = TRUE; | |
5746 | ret->mustBreak = FALSE; | |
5747 | ret->exitCode = XK_ERROR; | |
5748 | DPRINTF (("Jump point: %s", exprNode_unparse (ret))); | |
5749 | } | |
5750 | else | |
5751 | { | |
5752 | ret->exitCode = XK_MUSTEXIT; | |
5753 | ret->canBreak = TRUE; | |
5754 | } | |
5755 | ||
5756 | } | |
5757 | } | |
5758 | } | |
5759 | else | |
5760 | { | |
5761 | if ((e2->kind == XPR_CASE || e2->kind == XPR_DEFAULT)) | |
5762 | { | |
5763 | /* | |
5764 | ** We want a warning anytime we have: | |
5765 | ** case xxx: ... | |
5766 | ** yyy; <<<- no break or return | |
5767 | ** case zzz: ... | |
5768 | */ | |
5769 | ||
5770 | exprNode lastStmt = exprNode_lastStatement (e1); | |
5771 | ||
5772 | if (exprNode_isDefined (lastStmt) | |
5773 | && !exprNode_mustEscape (lastStmt) | |
5774 | && !exprNode_mustBreak (lastStmt) | |
5775 | && !exprNode_isCaseMarker (lastStmt) | |
5776 | && !exprNode_isDefaultMarker (lastStmt) | |
5777 | && !exprNode_isLabelMarker (lastStmt)) | |
5778 | { | |
5779 | voptgenerror (FLG_CASEBREAK, | |
5780 | cstring_makeLiteral | |
5781 | ("Fall through case (no preceeding break)"), | |
5782 | e2->loc); | |
5783 | } | |
5784 | } | |
5785 | } | |
5786 | } | |
5787 | ||
5788 | exprNode_mergeUSs (ret, e2); | |
dc92450f | 5789 | // ret = exprNode_mergeEnvironments (ret, e1, e2); |
616915dd | 5790 | usymtab_setExitCode (ret->exitCode); |
5791 | ||
5792 | if (ret->mustBreak) | |
5793 | { | |
5794 | usymtab_setMustBreak (); | |
5795 | } | |
5796 | ||
5797 | return ret; | |
5798 | } | |
5799 | ||
5800 | exprNode exprNode_createTok (/*@only@*/ lltok t) | |
5801 | { | |
5802 | exprNode ret = exprNode_create (ctype_unknown); | |
5803 | ret->kind = XPR_TOK; | |
5804 | ret->edata = exprData_makeTok (t); | |
5805 | return ret; | |
5806 | } | |
5807 | ||
5808 | exprNode exprNode_statement (/*@only@*/ exprNode e, /*@only@*/ lltok t) | |
5809 | { | |
5810 | if (!exprNode_isError (e)) | |
5811 | { | |
5812 | exprNode_checkStatement(e); | |
5813 | } | |
5814 | ||
5815 | return (exprNode_statementError (e, t)); | |
5816 | } | |
5817 | ||
5818 | static exprNode exprNode_statementError (/*@only@*/ exprNode e, /*@only@*/ lltok t) | |
5819 | { | |
5820 | exprNode ret = exprNode_createPartialCopy (e); | |
5821 | ||
5822 | if (!exprNode_isError (e)) | |
5823 | { | |
5824 | if (e->kind != XPR_ASSIGN) | |
5825 | { | |
5826 | exprNode_checkUse (ret, e->sref, e->loc); | |
5827 | } | |
5828 | ||
5829 | ret->exitCode = e->exitCode; | |
5830 | ret->canBreak = e->canBreak; | |
5831 | ret->mustBreak = e->mustBreak; | |
5832 | } | |
5833 | ||
5834 | ret->edata = exprData_makeUop (e, t); | |
5835 | ret->kind = XPR_STMT; | |
5836 | ||
5837 | return ret; | |
5838 | } | |
5839 | ||
5840 | exprNode exprNode_checkExpr (/*@returned@*/ exprNode e) | |
5841 | { | |
5842 | if (!exprNode_isError (e)) | |
5843 | { | |
5844 | if (e->kind != XPR_ASSIGN) | |
5845 | { | |
5846 | exprNode_checkUse (e, e->sref, e->loc); | |
5847 | } | |
5848 | } | |
5849 | ||
5850 | return e; | |
5851 | } | |
5852 | ||
5853 | void exprNode_produceGuards (exprNode pred) | |
5854 | { | |
5855 | if (!exprNode_isError (pred)) | |
5856 | { | |
5857 | if (ctype_isRealPointer (pred->typ)) | |
5858 | { | |
5859 | pred->guards = guardSet_addTrueGuard (pred->guards, pred->sref); | |
5860 | } | |
5861 | ||
5862 | exprNode_checkUse (pred, pred->sref, pred->loc); | |
5863 | exprNode_resetSref (pred); | |
5864 | } | |
5865 | } | |
5866 | ||
5867 | exprNode exprNode_makeBlock (/*@only@*/ exprNode e) | |
5868 | { | |
5869 | exprNode ret = exprNode_createPartialCopy (e); | |
5870 | ||
5871 | if (!exprNode_isError (e)) | |
5872 | { | |
5873 | ret->exitCode = e->exitCode; | |
5874 | ret->canBreak = e->canBreak; | |
5875 | ret->mustBreak = e->mustBreak; | |
5876 | } | |
5877 | ||
5878 | ret->edata = exprData_makeSingle (e); | |
5879 | ret->kind = XPR_BLOCK; | |
5880 | return ret; | |
5881 | } | |
5882 | ||
5883 | bool exprNode_isBlock (exprNode e) | |
5884 | { | |
5885 | return (exprNode_isDefined (e) | |
5886 | && ((e)->kind == XPR_BLOCK)); | |
5887 | } | |
5888 | ||
5889 | bool exprNode_isAssign (exprNode e) | |
5890 | { | |
5891 | if (exprNode_isDefined (e)) | |
5892 | { | |
5893 | return (e->kind == XPR_ASSIGN); | |
5894 | } | |
5895 | ||
5896 | return FALSE; | |
5897 | } | |
5898 | ||
5899 | bool exprNode_isEmptyStatement (exprNode e) | |
5900 | { | |
5901 | return (exprNode_isDefined (e) | |
5902 | && (e->kind == XPR_TOK) | |
5903 | && (lltok_isSemi (exprData_getTok (e->edata)))); | |
5904 | } | |
5905 | ||
5906 | exprNode exprNode_if (/*@only@*/ exprNode pred, /*@only@*/ exprNode tclause) | |
5907 | { | |
5908 | exprNode ret; | |
5909 | bool emptyErr = FALSE; | |
5910 | ||
5911 | if (context_maybeSet (FLG_IFEMPTY)) | |
5912 | { | |
5913 | if (exprNode_isEmptyStatement (tclause)) | |
5914 | { | |
5915 | emptyErr = optgenerror (FLG_IFEMPTY, | |
5916 | cstring_makeLiteral | |
5917 | ("Body of if statement is empty"), | |
5918 | exprNode_loc (tclause)); | |
5919 | } | |
5920 | } | |
5921 | ||
5922 | if (!emptyErr && context_maybeSet (FLG_IFBLOCK)) | |
5923 | { | |
5924 | if (exprNode_isDefined (tclause) | |
5925 | && !exprNode_isBlock (tclause)) | |
5926 | { | |
5927 | voptgenerror (FLG_IFBLOCK, | |
5928 | message | |
5929 | ("Body of if statement is not a block: %s", | |
5930 | exprNode_unparse (tclause)), | |
5931 | exprNode_loc (tclause)); | |
5932 | } | |
5933 | } | |
5934 | ||
5935 | if (exprNode_isError (pred)) | |
5936 | { | |
5937 | if (exprNode_isError (tclause)) | |
5938 | { | |
5939 | ret = exprNode_createLoc (ctype_unknown, g_currentloc); | |
5940 | } | |
5941 | else | |
5942 | { | |
5943 | ret = exprNode_createPartialCopy (tclause); | |
5944 | } | |
5945 | } | |
5946 | else | |
5947 | { | |
5948 | if (exprNode_mustEscape (pred)) | |
5949 | { | |
5950 | voptgenerror | |
5951 | (FLG_UNREACHABLE, | |
5952 | message ("Predicate always exits: %s", exprNode_unparse (pred)), | |
5953 | exprNode_loc (pred)); | |
5954 | } | |
5955 | ||
5956 | exprNode_checkPred (cstring_makeLiteralTemp ("if"), pred); | |
5957 | exprNode_checkUse (pred, pred->sref, pred->loc); | |
5958 | ||
5959 | if (!exprNode_isError (tclause)) | |
5960 | { | |
5961 | exprNode_mergeCondUSs (pred, tclause, exprNode_undefined); | |
5962 | } | |
5963 | ||
5964 | ret = exprNode_createPartialCopy (pred); | |
5965 | } | |
5966 | ||
5967 | ret->kind = XPR_IF; | |
5968 | ret->edata = exprData_makePair (pred, tclause); | |
5969 | ||
5970 | ret->exitCode = XK_UNKNOWN; | |
5971 | ||
5972 | if (exprNode_isDefined (tclause)) | |
5973 | { | |
5974 | ret->exitCode = exitkind_makeConditional (tclause->exitCode); | |
5975 | ret->canBreak = tclause->canBreak; | |
5976 | ret->sets = sRefSet_union (ret->sets, tclause->sets); | |
5977 | ret->msets = sRefSet_union (ret->msets, tclause->msets); | |
5978 | ret->uses = sRefSet_union (ret->uses, tclause->uses); | |
5979 | } | |
5980 | ||
5981 | ret->mustBreak = FALSE; | |
5982 | ||
5983 | return ret; | |
5984 | } | |
5985 | ||
5986 | exprNode exprNode_ifelse (/*@only@*/ exprNode pred, | |
5987 | /*@only@*/ exprNode tclause, | |
5988 | /*@only@*/ exprNode eclause) | |
5989 | { | |
5990 | exprNode ret; | |
5991 | bool tEmptyErr = FALSE; | |
5992 | bool eEmptyErr = FALSE; | |
5993 | ||
5994 | if (context_maybeSet (FLG_IFEMPTY)) | |
5995 | { | |
5996 | if (exprNode_isEmptyStatement (tclause)) | |
5997 | { | |
5998 | tEmptyErr = optgenerror | |
5999 | (FLG_IFEMPTY, | |
6000 | cstring_makeLiteral | |
6001 | ("Body of if clause of if statement is empty"), | |
6002 | exprNode_loc (tclause)); | |
6003 | } | |
6004 | ||
6005 | if (exprNode_isEmptyStatement (eclause)) | |
6006 | { | |
6007 | eEmptyErr = optgenerror | |
6008 | (FLG_IFEMPTY, | |
6009 | cstring_makeLiteral | |
6010 | ("Body of else clause of if statement is empty"), | |
6011 | exprNode_loc (eclause)); | |
6012 | } | |
6013 | } | |
6014 | ||
6015 | if (context_maybeSet (FLG_IFBLOCK)) | |
6016 | { | |
6017 | if (!tEmptyErr | |
6018 | && exprNode_isDefined (tclause) | |
6019 | && !exprNode_isBlock (tclause)) | |
6020 | { | |
6021 | voptgenerror (FLG_IFBLOCK, | |
6022 | message | |
6023 | ("Body of if clause of if statement is not a block: %s", | |
6024 | exprNode_unparse (tclause)), | |
6025 | exprNode_loc (tclause)); | |
6026 | } | |
6027 | ||
6028 | if (!eEmptyErr | |
6029 | && exprNode_isDefined (eclause) | |
6030 | && !exprNode_isBlock (eclause) | |
6031 | && !(eclause->kind == XPR_IF) | |
6032 | && !(eclause->kind == XPR_IFELSE)) | |
6033 | { | |
6034 | voptgenerror | |
6035 | (FLG_IFBLOCK, | |
6036 | message | |
6037 | ("Body of else clause of if statement is not a block: %s", | |
6038 | exprNode_unparse (eclause)), | |
6039 | exprNode_loc (eclause)); | |
6040 | } | |
6041 | } | |
6042 | ||
6043 | if (context_maybeSet (FLG_ELSEIFCOMPLETE)) | |
6044 | { | |
6045 | if (exprNode_isDefined (eclause) | |
6046 | && (eclause->kind == XPR_IF)) | |
6047 | { | |
6048 | voptgenerror (FLG_ELSEIFCOMPLETE, | |
6049 | message ("Incomplete else if logic (no final else): %s", | |
6050 | exprNode_unparse (eclause)), | |
6051 | exprNode_loc (eclause)); | |
6052 | } | |
6053 | } | |
6054 | ||
6055 | if (exprNode_isError (pred)) | |
6056 | { | |
6057 | if (exprNode_isError (tclause)) | |
6058 | { | |
6059 | if (exprNode_isError (eclause)) | |
6060 | { | |
6061 | ret = exprNode_createLoc (ctype_unknown, g_currentloc); | |
6062 | } | |
6063 | else | |
6064 | { | |
6065 | ret = exprNode_createPartialCopy (eclause); | |
6066 | } | |
6067 | } | |
6068 | else | |
6069 | { | |
6070 | ret = exprNode_createPartialCopy (tclause); | |
6071 | } | |
6072 | } | |
6073 | else /* pred is okay */ | |
6074 | { | |
6075 | ret = exprNode_createPartialCopy (pred); | |
6076 | ||
6077 | if (exprNode_mustEscape (pred)) | |
6078 | { | |
6079 | voptgenerror | |
6080 | (FLG_UNREACHABLE, | |
6081 | message ("Predicate always exits: %s", exprNode_unparse (pred)), | |
6082 | exprNode_loc (pred)); | |
6083 | } | |
6084 | ||
6085 | exprNode_checkPred (cstring_makeLiteralTemp ("if"), pred); | |
6086 | exprNode_checkUse (ret, pred->sref, pred->loc); | |
6087 | ||
6088 | exprNode_mergeCondUSs (ret, tclause, eclause); | |
6089 | } | |
6090 | ||
6091 | ret->kind = XPR_IFELSE; | |
6092 | ret->edata = exprData_makeCond (pred, tclause, eclause); | |
6093 | ||
6094 | if (exprNode_isDefined (tclause) && exprNode_isDefined (eclause)) | |
6095 | { | |
6096 | exprNode_combineControl (ret, tclause, eclause); | |
6097 | ret->loc = fileloc_update (ret->loc, eclause->loc); | |
6098 | } | |
6099 | ||
6100 | return ret; | |
6101 | } | |
6102 | ||
6103 | /* | |
6104 | ** *allpaths <- TRUE iff all executions paths must go through the switch | |
6105 | */ | |
6106 | ||
6107 | static bool | |
6108 | checkSwitchExpr (exprNode test, /*@dependent@*/ exprNode e, /*@out@*/ bool *allpaths) | |
6109 | { | |
6110 | exprNodeSList el = exprNode_flatten (e); | |
6111 | bool mustReturn = TRUE; /* find a branch that doesn't */ | |
6112 | bool thisReturn = FALSE; | |
6113 | bool hasDefault = FALSE; | |
6114 | bool hasAllMembers = FALSE; | |
6115 | bool inSwitch = FALSE; | |
6116 | bool isEnumSwitch = FALSE; | |
6117 | bool canBreak = FALSE; | |
6118 | bool fallThrough = FALSE; | |
6119 | ctype ct = ctype_unknown; | |
6120 | enumNameSList usedEnums; | |
6121 | enumNameList enums; | |
6122 | ||
6123 | if (exprNode_isDefined (test)) | |
6124 | { | |
6125 | ctype ttype; | |
6126 | ||
6127 | ct = test->typ; | |
6128 | ttype = ctype_realType (ct); | |
6129 | ||
6130 | if (ctype_isEnum (ttype)) | |
6131 | { | |
6132 | isEnumSwitch = TRUE; | |
6133 | enums = ctype_elist (ttype); | |
6134 | usedEnums = enumNameSList_new (); | |
6135 | } | |
6136 | } | |
6137 | ||
6138 | exprNodeSList_elements (el, current) | |
6139 | { | |
6140 | if (exprNode_isDefined (current)) | |
6141 | { | |
6142 | switch (current->kind) | |
6143 | { | |
6144 | case XPR_FTDEFAULT: | |
6145 | case XPR_DEFAULT: | |
6146 | if (hasDefault) | |
6147 | { | |
6148 | voptgenerror | |
6149 | (FLG_CONTROL, | |
6150 | message ("Duplicate default cases in switch"), | |
6151 | exprNode_loc (current)); | |
6152 | } | |
6153 | /*@fallthrough@*/ | |
6154 | case XPR_FTCASE: | |
6155 | case XPR_CASE: | |
6156 | if (current->kind == XPR_DEFAULT || current->kind == XPR_FTDEFAULT) | |
6157 | { | |
6158 | hasDefault = TRUE; | |
6159 | } | |
6160 | else | |
6161 | { | |
6162 | if (isEnumSwitch) | |
6163 | { | |
6164 | exprNode st = exprData_getSingle (current->edata); | |
6165 | uentry ue = exprNode_getUentry (st); | |
6166 | ||
6167 | if (uentry_isValid (ue)) | |
6168 | { | |
6169 | cstring cname = uentry_rawName (ue); | |
6170 | ||
6171 | if (enumNameList_member (/*@-usedef@*/enums/*@=usedef@*/, cname)) | |
6172 | { | |
6173 | if (enumNameSList_member | |
6174 | (/*@-usedef@*/usedEnums/*@=usedef@*/, cname)) | |
6175 | { | |
6176 | voptgenerror | |
6177 | (FLG_CONTROL, | |
6178 | message ("Duplicate case in switch: %s", | |
6179 | cname), | |
6180 | current->loc); | |
6181 | } | |
6182 | else | |
6183 | { | |
6184 | enumNameSList_addh (usedEnums, cname); | |
6185 | } | |
6186 | } | |
6187 | else | |
6188 | { | |
6189 | voptgenerror | |
6190 | (FLG_TYPE, | |
6191 | message ("Case in switch not %s member: %s", | |
6192 | ctype_unparse (ct), cname), | |
6193 | current->loc); | |
6194 | } | |
6195 | } | |
6196 | } | |
6197 | } | |
6198 | ||
6199 | if (inSwitch && !fallThrough) | |
6200 | { | |
6201 | if (!thisReturn || canBreak) | |
6202 | { | |
6203 | mustReturn = FALSE; | |
6204 | } | |
6205 | } | |
6206 | ||
6207 | fallThrough = TRUE; | |
6208 | inSwitch = TRUE; | |
6209 | thisReturn = FALSE; | |
6210 | canBreak = FALSE; | |
6211 | /*@switchbreak@*/ break; | |
6212 | default: | |
6213 | thisReturn = thisReturn || exprNode_mustEscape (current); | |
6214 | canBreak = canBreak || current->canBreak; | |
6215 | if (canBreak) fallThrough = FALSE; | |
6216 | } | |
6217 | } | |
6218 | } end_exprNodeSList_elements; | |
6219 | ||
6220 | if (inSwitch) /* check the last one! */ | |
6221 | { | |
6222 | if (!thisReturn || canBreak) | |
6223 | { | |
6224 | mustReturn = FALSE; | |
6225 | } | |
6226 | } | |
6227 | ||
6228 | if (isEnumSwitch) | |
6229 | { | |
6230 | if (!hasDefault | |
6231 | && (enumNameSList_size (/*@-usedef@*/usedEnums/*@=usedef@*/) != | |
6232 | enumNameList_size (/*@-usedef@*/enums/*@=usedef@*/))) | |
6233 | { | |
6234 | enumNameSList unused = enumNameSList_subtract (enums, usedEnums); | |
6235 | ||
6236 | voptgenerror (FLG_MISSCASE, | |
6237 | message ("Missing case%s in switch: %q", | |
6238 | cstring_makeLiteralTemp | |
6239 | ((enumNameSList_size (unused) > 1) ? "s" : ""), | |
6240 | enumNameSList_unparse (unused)), | |
6241 | g_currentloc); | |
6242 | ||
6243 | enumNameSList_free (unused); | |
6244 | } | |
6245 | else | |
6246 | { | |
6247 | hasAllMembers = TRUE; | |
6248 | *allpaths = TRUE; | |
6249 | } | |
6250 | ||
6251 | enumNameSList_free (usedEnums); | |
6252 | } | |
6253 | else | |
6254 | { | |
6255 | *allpaths = hasDefault; | |
6256 | } | |
6257 | ||
6258 | exprNodeSList_free (el); | |
6259 | return ((hasDefault || hasAllMembers) && mustReturn); | |
6260 | } | |
6261 | ||
6262 | exprNode exprNode_switch (/*@only@*/ exprNode e, /*@only@*/ exprNode s) | |
6263 | { | |
6264 | exprNode ret = exprNode_createPartialCopy (e); | |
6265 | bool allpaths; | |
6266 | ||
6267 | DPRINTF (("Switch: %s", exprNode_unparse (s))); | |
6268 | ||
6269 | ret->kind = XPR_SWITCH; | |
6270 | ret->edata = exprData_makePair (e, s); | |
6271 | ||
6272 | if (!exprNode_isError (s)) | |
6273 | { | |
6274 | exprNode fs = exprNode_firstStatement (s); | |
6275 | ret->loc = fileloc_update (ret->loc, s->loc); | |
6276 | ||
6277 | if (exprNode_isUndefined (fs) | |
6278 | || exprNode_isCaseMarker (fs) || exprNode_isLabelMarker (fs) | |
6279 | || exprNode_isDefaultMarker (fs)) { | |
6280 | ; | |
6281 | } else { | |
6282 | voptgenerror (FLG_FIRSTCASE, | |
6283 | message | |
6284 | ("Statement after switch is not a case: %s", exprNode_unparse (fs)), | |
6285 | fs->loc); | |
6286 | } | |
6287 | } | |
6288 | ||
6289 | if (!exprNode_isError (e)) | |
6290 | { | |
6291 | if (checkSwitchExpr (e, s, &allpaths)) | |
6292 | { | |
6293 | ret->exitCode = XK_MUSTRETURN; | |
6294 | } | |
6295 | else | |
6296 | { | |
6297 | ret->exitCode = e->exitCode; | |
6298 | } | |
6299 | ||
6300 | ret->canBreak = e->canBreak; | |
6301 | ret->mustBreak = e->mustBreak; | |
6302 | } | |
6303 | /* | |
6304 | ** forgot this! | |
6305 | ** exprNode.c:3883,32: Variable allpaths used before definition | |
6306 | */ | |
6307 | else | |
6308 | { | |
6309 | allpaths = FALSE; | |
6310 | } | |
6311 | ||
6312 | DPRINTF (("Context exit switch!")); | |
6313 | context_exitSwitch (ret, allpaths); | |
6314 | DPRINTF (("Context exit switch done!")); | |
6315 | ||
6316 | return ret; | |
6317 | } | |
6318 | ||
6319 | static void checkInfiniteLoop (/*@notnull@*/ exprNode test, | |
6320 | /*@notnull@*/ exprNode body) | |
6321 | { | |
6322 | sRefSet tuses = test->uses; | |
6323 | ||
6324 | if (!sRefSet_isEmpty (test->uses)) | |
6325 | { | |
6326 | sRefSet sets = sRefSet_newCopy (body->sets); | |
6327 | bool hasError = TRUE; | |
6328 | bool innerState = FALSE; | |
6329 | sRefSet tuncon = sRefSet_undefined; | |
6330 | ||
6331 | sets = sRefSet_union (sets, test->sets); | |
6332 | sets = sRefSet_union (sets, body->msets); | |
6333 | sets = sRefSet_union (sets, test->msets); | |
6334 | ||
6335 | sRefSet_allElements (tuses, el) | |
6336 | { | |
6337 | if (sRef_isUnconstrained (el)) | |
6338 | { | |
6339 | tuncon = sRefSet_insert (tuncon, el); | |
6340 | } | |
6341 | else | |
6342 | { | |
6343 | if (sRefSet_member (sets, el)) | |
6344 | { | |
6345 | hasError = FALSE; | |
6346 | break; | |
6347 | } | |
6348 | } | |
6349 | ||
6350 | if (sRef_isInternalState (el) | |
6351 | || sRef_isFileStatic (sRef_getRootBase (el))) | |
6352 | { | |
6353 | innerState = TRUE; | |
6354 | } | |
6355 | } end_sRefSet_allElements ; | |
6356 | ||
6357 | if (hasError) | |
6358 | { | |
6359 | sRefSet suncon = sRefSet_undefined; | |
6360 | bool sinner = FALSE; | |
6361 | ||
6362 | sRefSet_allElements (sets, el) | |
6363 | { | |
6364 | if (sRef_isUnconstrained (el)) | |
6365 | { | |
6366 | suncon = sRefSet_insert (suncon, el); | |
6367 | } | |
6368 | else if (sRef_isInternalState (el)) | |
6369 | { | |
6370 | sinner = TRUE; | |
6371 | } | |
6372 | else | |
6373 | { | |
6374 | ; | |
6375 | } | |
6376 | } end_sRefSet_allElements ; | |
6377 | ||
6378 | if (sinner && innerState) | |
6379 | { | |
6380 | ; | |
6381 | } | |
6382 | else if (sRefSet_isEmpty (tuncon) | |
6383 | && sRefSet_isEmpty (suncon)) | |
6384 | { | |
6385 | voptgenerror | |
6386 | (FLG_INFLOOPS, | |
6387 | message | |
6388 | ("Suspected infinite loop. No value used in loop test (%q) " | |
6389 | "is modified by test or loop body.", | |
6390 | sRefSet_unparsePlain (tuses)), | |
6391 | test->loc); | |
6392 | } | |
6393 | else | |
6394 | { | |
6395 | if (sRefSet_isEmpty (tuncon)) | |
6396 | { | |
6397 | voptgenerror | |
6398 | (FLG_INFLOOPSUNCON, | |
6399 | message ("Suspected infinite loop. No condition values " | |
6400 | "modified. Modification possible through " | |
6401 | "unconstrained calls: %q", | |
6402 | sRefSet_unparsePlain (suncon)), | |
6403 | test->loc); | |
6404 | } | |
6405 | else | |
6406 | { | |
6407 | voptgenerror | |
6408 | (FLG_INFLOOPSUNCON, | |
6409 | message ("Suspected infinite loop. No condition values " | |
6410 | "modified. Possible undetected dependency through " | |
6411 | "unconstrained calls in loop test: %q", | |
6412 | sRefSet_unparsePlain (tuncon)), | |
6413 | test->loc); | |
6414 | } | |
6415 | } | |
6416 | } | |
6417 | ||
6418 | sRefSet_free (sets); | |
6419 | } | |
6420 | } | |
6421 | ||
6422 | exprNode exprNode_while (/*@keep@*/ exprNode t, /*@keep@*/ exprNode b) | |
6423 | { | |
6424 | exprNode ret; | |
6425 | bool emptyErr = FALSE; | |
616915dd | 6426 | |
6427 | if (context_maybeSet (FLG_WHILEEMPTY)) | |
6428 | { | |
6429 | if (exprNode_isEmptyStatement (b)) | |
6430 | { | |
6431 | emptyErr = optgenerror | |
6432 | (FLG_WHILEEMPTY, | |
6433 | cstring_makeLiteral | |
6434 | ("Body of while statement is empty"), | |
6435 | exprNode_loc (b)); | |
6436 | } | |
6437 | } | |
6438 | ||
6439 | if (!emptyErr && context_maybeSet (FLG_WHILEBLOCK)) | |
6440 | { | |
6441 | if (exprNode_isDefined (b) | |
6442 | && !exprNode_isBlock (b)) | |
6443 | { | |
6444 | if (context_inIterDef () | |
6445 | && (b->kind == XPR_STMTLIST | |
6446 | || b->kind == XPR_TOK)) | |
6447 | { | |
6448 | ; /* no error */ | |
6449 | } | |
6450 | else | |
6451 | { | |
6452 | voptgenerror (FLG_WHILEBLOCK, | |
6453 | message | |
6454 | ("Body of while statement is not a block: %s", | |
6455 | exprNode_unparse (b)), | |
6456 | exprNode_loc (b)); | |
6457 | } | |
6458 | } | |
6459 | } | |
6460 | ||
6461 | if (exprNode_isError (t)) | |
6462 | { | |
6463 | if (exprNode_isError (b)) | |
6464 | { | |
6465 | ret = exprNode_createLoc (ctype_unknown, g_currentloc); | |
6466 | } | |
6467 | else | |
6468 | { | |
6469 | ret = exprNode_createPartialCopy (b); | |
6470 | } | |
6471 | } | |
6472 | else | |
6473 | { | |
6474 | exprNode test; | |
6475 | ||
6476 | ret = exprNode_createPartialCopy (t); | |
6477 | ||
6478 | llassert (t->kind == XPR_WHILEPRED); | |
6479 | ||
6480 | test = exprData_getSingle (t->edata); | |
6481 | ||
6482 | if (!exprNode_isError (b) && exprNode_isDefined (test)) | |
6483 | { | |
6484 | if (context_maybeSet (FLG_INFLOOPS) | |
6485 | || context_maybeSet (FLG_INFLOOPSUNCON)) | |
6486 | { | |
6487 | /* | |
6488 | ** check that some variable in the predicate is set by the body | |
6489 | ** if the predicate uses any variables | |
6490 | */ | |
6491 | ||
6492 | checkInfiniteLoop (test, b); | |
6493 | } | |
6494 | ||
6495 | exprNode_mergeUSs (ret, b); | |
6496 | ||
6497 | if (exprNode_isDefined (b)) | |
6498 | { | |
6499 | ret->exitCode = exitkind_makeConditional (b->exitCode); | |
6500 | } | |
6501 | } | |
6502 | } | |
6503 | ||
6504 | ret->edata = exprData_makePair (t, b); | |
6505 | ret->kind = XPR_WHILE; | |
6506 | ||
6507 | if (exprNode_isDefined (t) && exprNode_mustEscape (t)) | |
6508 | { | |
6509 | voptgenerror | |
6510 | (FLG_CONTROL, | |
6511 | message ("Predicate always exits: %s", exprNode_unparse (t)), | |
6512 | exprNode_loc (t)); | |
6513 | } | |
6514 | ||
6515 | ret->exitCode = XK_NEVERESCAPE; | |
6516 | ||
6517 | /* | |
6518 | ** If loop is infinite, and there is no break inside, | |
6519 | ** exit code is never reach. | |
6520 | */ | |
6521 | ||
6522 | if (exprNode_knownIntValue (t)) | |
6523 | { | |
6524 | if (!exprNode_isZero (t)) | |
6525 | { | |
6526 | if (exprNode_isDefined (b)) | |
6527 | { | |
6528 | if (!b->canBreak) | |
6529 | { | |
6530 | /* Really, it means never reached. */ | |
6531 | ret->exitCode = XK_MUSTEXIT; | |
6532 | } | |
6533 | } | |
6534 | } | |
6535 | } | |
6536 | else | |
6537 | { | |
6538 | ; | |
6539 | } | |
6540 | ||
6541 | ret->canBreak = FALSE; | |
6542 | ret->mustBreak = FALSE; | |
6543 | ||
6544 | return ret; | |
6545 | } | |
6546 | ||
6547 | /* | |
6548 | ** do { b } while (t); | |
6549 | ** | |
6550 | ** note: body passed as first argument | |
6551 | */ | |
6552 | ||
6553 | exprNode exprNode_doWhile (/*@only@*/ exprNode b, /*@only@*/ exprNode t) | |
6554 | { | |
6555 | exprNode ret; | |
6556 | ||
6557 | if (exprNode_isError (t)) | |
6558 | { | |
6559 | if (exprNode_isError (b)) | |
6560 | { | |
6561 | ret = exprNode_createLoc (ctype_unknown, g_currentloc); | |
6562 | } | |
6563 | else | |
6564 | { | |
6565 | ret = exprNode_createPartialCopy (b); | |
6566 | ||
6567 | ret->exitCode = exitkind_makeConditional (b->exitCode); | |
6568 | exprNode_checkUse (ret, b->sref, b->loc); | |
6569 | ret->exitCode = b->exitCode; | |
6570 | ret->canBreak = b->canBreak; | |
6571 | ret->mustBreak = b->mustBreak; | |
6572 | } | |
6573 | } | |
6574 | else | |
6575 | { | |
6576 | ret = exprNode_createPartialCopy (t); | |
6577 | exprNode_checkPred (cstring_makeLiteralTemp ("while"), t); | |
6578 | ||
6579 | if (!exprNode_isError (b)) | |
6580 | { | |
6581 | /* | |
6582 | ** forgot the copy's --- why wasn't this detected?? | |
6583 | */ | |
6584 | ||
6585 | ret->sets = sRefSet_copy (ret->sets, b->sets); | |
6586 | ret->msets = sRefSet_copy (ret->msets, b->msets); | |
6587 | ret->uses = sRefSet_copy (ret->uses, b->uses); | |
6588 | ||
6589 | /* left this out --- causes and aliasing bug (infinite loop) | |
6590 | should be detected?? */ | |
6591 | ||
6592 | exprNode_checkUse (ret, b->sref, b->loc); | |
6593 | exprNode_mergeUSs (ret, t); | |
6594 | exprNode_checkUse (ret, t->sref, t->loc); | |
6595 | ||
6596 | ret->exitCode = b->exitCode; | |
6597 | ret->canBreak = b->canBreak; | |
6598 | ret->mustBreak = b->mustBreak; | |
6599 | } | |
6600 | } | |
6601 | ||
6602 | context_exitDoWhileClause (t); | |
6603 | ||
6604 | ret->kind = XPR_DOWHILE; | |
6605 | ret->edata = exprData_makePair (t, b); | |
6606 | return ret; | |
6607 | } | |
6608 | ||
6609 | exprNode exprNode_for (/*@keep@*/ exprNode inc, /*@keep@*/ exprNode body) | |
6610 | { | |
6611 | exprNode ret; | |
6612 | bool emptyErr = FALSE; | |
6613 | ||
6614 | if (context_maybeSet (FLG_FOREMPTY)) | |
6615 | { | |
6616 | if (exprNode_isEmptyStatement (body)) | |
6617 | { | |
6618 | emptyErr = optgenerror | |
6619 | (FLG_FOREMPTY, | |
6620 | cstring_makeLiteral | |
6621 | ("Body of for statement is empty"), | |
6622 | exprNode_loc (body)); | |
6623 | } | |
6624 | } | |
6625 | ||
6626 | if (!emptyErr && context_maybeSet (FLG_FORBLOCK)) | |
6627 | { | |
6628 | if (exprNode_isDefined (body) | |
6629 | && !exprNode_isBlock (body)) | |
6630 | { | |
6631 | if (context_inIterDef () | |
6632 | && (body->kind == XPR_STMTLIST | |
6633 | || body->kind == XPR_TOK)) | |
6634 | { | |
6635 | ; /* no error */ | |
6636 | } | |
6637 | else | |
6638 | { | |
6639 | voptgenerror (FLG_FORBLOCK, | |
6640 | message | |
6641 | ("Body of for statement is not a block: %s", | |
6642 | exprNode_unparse (body)), | |
6643 | exprNode_loc (body)); | |
6644 | } | |
6645 | } | |
6646 | } | |
6647 | ||
6648 | /* | |
6649 | ** for ud purposes: (alreadly) init -> test -> (now) LOOP: body + inc + test | |
6650 | */ | |
6651 | ||
6652 | if (exprNode_isError (body)) | |
6653 | { | |
6654 | ret = exprNode_createPartialCopy (inc); | |
6655 | } | |
6656 | else | |
6657 | { | |
6658 | ret = exprNode_createPartialCopy (body); | |
6659 | ||
6660 | ret->exitCode = exitkind_makeConditional (body->exitCode); | |
6661 | ||
6662 | exprNode_mergeUSs (inc, body); | |
6663 | ||
6664 | if (exprNode_isDefined (inc)) | |
6665 | { | |
6666 | exprNode tmp; | |
6667 | ||
6668 | context_setMessageAnnote (cstring_makeLiteral ("in post loop increment")); | |
6669 | ||
6670 | ||
6671 | tmp = exprNode_effect (exprData_getTripleInc (inc->edata)); | |
6672 | exprNode_freeShallow (tmp); | |
6673 | ||
6674 | context_clearMessageAnnote (); | |
6675 | context_setMessageAnnote (cstring_makeLiteral ("in post loop test")); | |
6676 | ||
6677 | tmp = exprNode_effect (exprData_getTripleTest (inc->edata)); | |
6678 | exprNode_freeShallow (tmp); | |
6679 | ||
6680 | context_clearMessageAnnote (); | |
6681 | ||
6682 | ret->uses = sRefSet_copy (ret->uses, inc->uses); | |
6683 | ret->sets = sRefSet_copy (ret->sets, inc->sets); | |
6684 | ret->msets = sRefSet_copy (ret->msets, inc->msets); | |
6685 | } | |
6686 | } | |
6687 | ||
6688 | ret->kind = XPR_FOR; | |
6689 | ret->edata = exprData_makePair (inc, body); | |
6690 | ||
6691 | if (exprNode_isDefined (inc)) { | |
6692 | exprNode test = exprData_getTripleTest (inc->edata); | |
6693 | ||
6694 | if (exprNode_isUndefined (test)) { | |
6695 | if (exprNode_isDefined (body)) { | |
6696 | if (!body->canBreak) { | |
6697 | /* Really, it means never reached. */ | |
6698 | ret->exitCode = XK_MUSTEXIT; | |
6699 | } | |
6700 | } | |
6701 | } | |
6702 | } | |
6703 | ||
6704 | return (ret); | |
6705 | } | |
6706 | ||
6707 | /* | |
6708 | ** for (init; test; inc) | |
6709 | ** ==> | |
6710 | ** init; | |
6711 | ** while (test) { body; inc; } | |
6712 | ** | |
6713 | ** Now: check use of init (may set vars for test) | |
6714 | ** check use of test | |
6715 | ** no checks on inc | |
6716 | _*/ | |
6717 | ||
6718 | /*@observer@*/ guardSet exprNode_getForGuards (exprNode pred) | |
6719 | { | |
6720 | exprNode test; | |
6721 | ||
6722 | if (exprNode_isError (pred)) return guardSet_undefined; | |
6723 | ||
6724 | llassert (pred->kind == XPR_FORPRED); | |
6725 | ||
6726 | test = exprData_getTripleTest (pred->edata); | |
6727 | ||
6728 | if (!exprNode_isError (test)) | |
6729 | { | |
6730 | return (test->guards); | |
6731 | } | |
6732 | ||
6733 | return guardSet_undefined; | |
6734 | } | |
6735 | ||
6736 | exprNode exprNode_whilePred (/*@only@*/ exprNode test) | |
6737 | { | |
6738 | exprNode ret = exprNode_createSemiCopy (test); | |
6739 | ||
6740 | if (exprNode_isDefined (test)) | |
6741 | { | |
6742 | exprNode_copySets (ret, test); | |
6743 | exprNode_checkPred (cstring_makeLiteralTemp ("while"), test); | |
6744 | exprNode_checkUse (ret, test->sref, test->loc); | |
6745 | ||
6746 | exprNode_produceGuards (test); | |
6747 | ||
6748 | ret->guards = guardSet_copy (test->guards); | |
6749 | } | |
6750 | ||
6751 | ret->edata = exprData_makeSingle (test); | |
6752 | ret->kind = XPR_WHILEPRED; | |
6753 | return ret; | |
6754 | } | |
6755 | ||
6756 | exprNode exprNode_forPred (/*@only@*/ exprNode init, /*@only@*/ exprNode test, | |
6757 | /*@only@*/ exprNode inc) | |
6758 | { | |
6759 | exprNode ret; | |
6760 | ||
6761 | /* | |
6762 | ** for ud purposes: init -> test -> LOOP: [ body, inc ] | |
6763 | */ | |
6764 | ||
6765 | exprNode_checkPred (cstring_makeLiteralTemp ("for"), test); | |
6766 | ||
6767 | if (!exprNode_isError (inc)) | |
6768 | { | |
6769 | ret = exprNode_createPartialCopy (inc); | |
6770 | } | |
6771 | else | |
6772 | { | |
6773 | if (!exprNode_isError (init)) | |
6774 | { | |
6775 | ret = exprNode_createPartialCopy (init); | |
6776 | } | |
6777 | else if (!exprNode_isError (test)) | |
6778 | { | |
6779 | ret = exprNode_createPartialCopy (test); | |
6780 | } | |
6781 | else | |
6782 | { | |
6783 | ret = exprNode_createUnknown (); | |
6784 | } | |
6785 | } | |
6786 | ||
6787 | exprNode_mergeUSs (ret, init); | |
6788 | ||
6789 | if (exprNode_isDefined (init)) | |
6790 | { | |
6791 | exprNode_checkUse (ret, init->sref, init->loc); | |
6792 | } | |
6793 | ||
6794 | exprNode_mergeUSs (ret, test); | |
6795 | ||
6796 | if (exprNode_isDefined (test)) | |
6797 | { | |
6798 | exprNode_checkUse (ret, test->sref, test->loc); | |
6799 | } | |
6800 | ||
6801 | ret->kind = XPR_FORPRED; | |
6802 | ret->edata = exprData_makeFor (init, test, inc); | |
6803 | return (ret); | |
6804 | } | |
6805 | ||
6806 | /*@notnull@*/ /*@only@*/ exprNode exprNode_goto (/*@only@*/ cstring label) | |
6807 | { | |
6808 | exprNode ret = exprNode_createUnknown (); | |
6809 | ||
6810 | if (context_inMacro ()) | |
6811 | { | |
6812 | voptgenerror (FLG_MACROSTMT, | |
6813 | message ("Macro %s uses goto (not functional)", | |
6814 | context_inFunctionName ()), | |
6815 | g_currentloc); | |
6816 | } | |
6817 | ||
6818 | ret->kind = XPR_GOTO; | |
6819 | ret->edata = exprData_makeLiteral (label); | |
6820 | ret->mustBreak = TRUE; | |
6821 | ret->exitCode = XK_GOTO; | |
6822 | ret->canBreak = TRUE; | |
6823 | return ret; | |
6824 | } | |
6825 | ||
6826 | exprNode exprNode_continue (/*@only@*/ lltok l, int qcontinue) | |
6827 | { | |
6828 | exprNode ret = exprNode_createLoc (ctype_unknown, fileloc_copy (lltok_getLoc (l))); | |
6829 | ||
6830 | ret->kind = XPR_CONTINUE; | |
6831 | ret->edata = exprData_makeTok (l); | |
6832 | ret->canBreak = TRUE; | |
6833 | ret->mustBreak = TRUE; | |
6834 | ||
6835 | if (qcontinue == QSAFEBREAK) | |
6836 | { | |
6837 | ; /* no checking */ | |
6838 | } | |
6839 | else if (qcontinue == QINNERCONTINUE) | |
6840 | { | |
6841 | if (!context_inDeepLoop ()) | |
6842 | { | |
6843 | voptgenerror | |
6844 | (FLG_LOOPLOOPCONTINUE, | |
6845 | cstring_makeLiteral ("Continue statement marked with innercontinue " | |
6846 | "is not inside a nested loop"), | |
6847 | exprNode_loc (ret)); | |
6848 | } | |
6849 | } | |
6850 | else if (qcontinue == BADTOK) | |
6851 | { | |
6852 | if (context_inDeepLoop ()) | |
6853 | { | |
6854 | voptgenerror | |
6855 | (FLG_LOOPLOOPCONTINUE, | |
6856 | cstring_makeLiteral ("Continue statement in nested loop"), | |
6857 | exprNode_loc (ret)); | |
6858 | } | |
6859 | } | |
6860 | else | |
6861 | { | |
6862 | llbuglit ("exprNode_continue: bad qcontinue"); | |
6863 | } | |
6864 | ||
6865 | return ret; | |
6866 | } | |
6867 | ||
6868 | exprNode exprNode_break (/*@only@*/ lltok l, int bqual) | |
6869 | { | |
6870 | exprNode ret = exprNode_createLoc (ctype_unknown, fileloc_copy (lltok_getLoc (l))); | |
6871 | clause breakClause = context_breakClause (); | |
6872 | ||
6873 | ret->kind = XPR_BREAK; | |
6874 | ret->edata = exprData_makeTok (l); | |
6875 | ret->canBreak = TRUE; | |
6876 | ret->mustBreak = TRUE; | |
6877 | ||
6878 | if (breakClause == NOCLAUSE) | |
6879 | { | |
6880 | voptgenerror | |
6881 | (FLG_SYNTAX, | |
6882 | cstring_makeLiteral ("Break not inside while, for or switch statement"), | |
6883 | exprNode_loc (ret)); | |
6884 | } | |
6885 | else | |
6886 | { | |
6887 | if (bqual != BADTOK) | |
6888 | { | |
6889 | switch (bqual) | |
6890 | { | |
6891 | case QSAFEBREAK: | |
6892 | break; | |
6893 | case QINNERBREAK: | |
6894 | if (breakClause == SWITCHCLAUSE) | |
6895 | { | |
6896 | if (!context_inDeepSwitch ()) | |
6897 | { | |
6898 | voptgenerror (FLG_SYNTAX, | |
6899 | cstring_makeLiteral | |
6900 | ("Break preceded by innerbreak is not in a deep switch"), | |
6901 | exprNode_loc (ret)); | |
6902 | } | |
6903 | } | |
6904 | else | |
6905 | { | |
6906 | if (!context_inDeepLoop ()) | |
6907 | { | |
6908 | voptgenerror (FLG_SYNTAX, | |
6909 | cstring_makeLiteral | |
6910 | ("Break preceded by innerbreak is not in a deep loop"), | |
6911 | exprNode_loc (ret)); | |
6912 | } | |
6913 | } | |
6914 | break; | |
6915 | case QLOOPBREAK: | |
6916 | if (breakClause == SWITCHCLAUSE) | |
6917 | { | |
6918 | voptgenerror (FLG_SYNTAX, | |
6919 | cstring_makeLiteral | |
6920 | ("Break preceded by loopbreak is breaking a switch"), | |
6921 | exprNode_loc (ret)); | |
6922 | } | |
6923 | break; | |
6924 | case QSWITCHBREAK: | |
6925 | if (breakClause != SWITCHCLAUSE) | |
6926 | { | |
6927 | voptgenerror | |
6928 | (FLG_SYNTAX, | |
6929 | message ("Break preceded by switchbreak is breaking %s", | |
6930 | cstring_makeLiteralTemp | |
6931 | ((breakClause == WHILECLAUSE | |
6932 | || breakClause == DOWHILECLAUSE) ? "a while loop" | |
6933 | : (breakClause == FORCLAUSE) ? "a for loop" | |
6934 | : (breakClause == ITERCLAUSE) ? "an iterator" | |
6935 | : "<error loop>")), | |
6936 | exprNode_loc (ret)); | |
6937 | } | |
6938 | break; | |
6939 | BADDEFAULT; | |
6940 | } | |
6941 | } | |
6942 | else | |
6943 | { | |
6944 | if (breakClause == SWITCHCLAUSE) | |
6945 | { | |
6946 | clause nextBreakClause = context_nextBreakClause (); | |
6947 | ||
6948 | switch (nextBreakClause) | |
6949 | { | |
6950 | case NOCLAUSE: break; | |
6951 | case WHILECLAUSE: | |
6952 | case DOWHILECLAUSE: | |
6953 | case FORCLAUSE: | |
6954 | case ITERCLAUSE: | |
6955 | voptgenerror | |
6956 | (FLG_LOOPSWITCHBREAK, | |
6957 | cstring_makeLiteral ("Break statement in switch inside loop"), | |
6958 | exprNode_loc (ret)); | |
6959 | break; | |
6960 | case SWITCHCLAUSE: | |
6961 | voptgenerror | |
6962 | (FLG_SWITCHSWITCHBREAK, | |
6963 | cstring_makeLiteral ("Break statement in switch inside switch"), | |
6964 | exprNode_loc (ret)); | |
6965 | break; | |
6966 | BADDEFAULT; | |
6967 | } | |
6968 | } | |
6969 | else | |
6970 | { | |
6971 | if (context_inDeepLoop ()) | |
6972 | { | |
6973 | voptgenerror | |
6974 | (FLG_LOOPLOOPBREAK, | |
6975 | cstring_makeLiteral ("Break statement in nested loop"), | |
6976 | exprNode_loc (ret)); | |
6977 | } | |
6978 | else | |
6979 | { | |
6980 | if (context_inDeepLoopSwitch ()) | |
6981 | { | |
6982 | voptgenerror | |
6983 | (FLG_SWITCHLOOPBREAK, | |
6984 | cstring_makeLiteral ("Break statement in loop inside switch"), | |
6985 | exprNode_loc (ret)); | |
6986 | } | |
6987 | } | |
6988 | } | |
6989 | } | |
6990 | } | |
6991 | ||
6992 | return ret; | |
6993 | } | |
6994 | ||
6995 | exprNode exprNode_nullReturn (/*@only@*/ lltok t) | |
6996 | { | |
6997 | fileloc loc = lltok_getLoc (t); | |
6998 | exprNode ret = exprNode_createLoc (ctype_unknown, fileloc_copy (loc)); | |
6999 | ||
7000 | context_returnFunction (); | |
7001 | exprChecks_checkNullReturn (loc); | |
7002 | ||
7003 | ret->kind = XPR_NULLRETURN; | |
7004 | ret->edata = exprData_makeTok (t); | |
7005 | ret->exitCode = XK_MUSTRETURN; | |
7006 | return ret; | |
7007 | } | |
7008 | ||
7009 | exprNode exprNode_return (/*@only@*/ exprNode e) | |
7010 | { | |
7011 | exprNode ret; | |
7012 | ||
7013 | if (exprNode_isError (e)) | |
7014 | { | |
7015 | ret = exprNode_createUnknown (); | |
7016 | } | |
7017 | else | |
7018 | { | |
7019 | ret = exprNode_createLoc (ctype_unknown, fileloc_copy (e->loc)); | |
7020 | ||
7021 | exprNode_checkUse (ret, e->sref, e->loc); | |
7022 | exprNode_checkReturn (e); | |
7023 | } | |
7024 | ||
7025 | context_returnFunction (); | |
7026 | ret->kind = XPR_RETURN; | |
7027 | ret->edata = exprData_makeSingle (e); | |
7028 | ret->exitCode = XK_MUSTRETURN; | |
7029 | ||
7030 | return (ret); | |
7031 | } | |
7032 | ||
7033 | exprNode exprNode_comma (/*@only@*/ exprNode e1, /*@only@*/ exprNode e2) | |
7034 | { | |
7035 | exprNode ret; | |
7036 | ||
7037 | if (exprNode_isError (e1)) | |
7038 | { | |
7039 | if (exprNode_isError (e2)) | |
7040 | { | |
7041 | ret = exprNode_createLoc (ctype_unknown, g_currentloc); | |
7042 | } | |
7043 | else | |
7044 | { | |
7045 | ret = exprNode_createPartialCopy (e2); | |
7046 | exprNode_checkUse (ret, e2->sref, e2->loc); | |
7047 | ret->sref = e2->sref; | |
7048 | } | |
7049 | } | |
7050 | else | |
7051 | { | |
7052 | ret = exprNode_createPartialCopy (e1); | |
7053 | ||
7054 | exprNode_checkUse (ret, e1->sref, e1->loc); | |
7055 | ||
7056 | if (!exprNode_isError (e2)) | |
7057 | { | |
7058 | exprNode_mergeUSs (ret, e2); | |
7059 | exprNode_checkUse (ret, e2->sref, e2->loc); | |
7060 | ret->sref = e2->sref; | |
7061 | } | |
7062 | } | |
7063 | ||
7064 | ret->kind = XPR_COMMA; | |
7065 | ret->edata = exprData_makePair (e1, e2); | |
7066 | ||
7067 | if (exprNode_isDefined (e1)) | |
7068 | { | |
7069 | if (exprNode_isDefined (e2)) | |
7070 | { | |
7071 | ret->typ = e2->typ; | |
7072 | ||
7073 | if (exprNode_mustEscape (e1) || e1->mustBreak) | |
7074 | { | |
7075 | voptgenerror | |
7076 | (FLG_UNREACHABLE, | |
7077 | message ("Second clause of comma expression is unreachable: %s", | |
7078 | exprNode_unparse (e2)), | |
7079 | exprNode_loc (e2)); | |
7080 | } | |
7081 | ||
7082 | ret->exitCode = exitkind_combine (e1->exitCode, e2->exitCode); | |
7083 | ret->mustBreak = e1->mustBreak || e2->mustBreak; | |
7084 | ret->canBreak = e1->canBreak || e2->canBreak; | |
7085 | } | |
7086 | else | |
7087 | { | |
7088 | if (exprNode_mustEscape (e1) || e1->mustBreak) | |
7089 | { | |
7090 | voptgenerror | |
7091 | (FLG_UNREACHABLE, | |
7092 | message ("Second clause of comma expression is unreachable: %s", | |
7093 | exprNode_unparse (e2)), | |
7094 | exprNode_loc (e2)); | |
7095 | } | |
7096 | ||
7097 | ret->exitCode = e1->exitCode; | |
7098 | ret->canBreak = e1->canBreak; | |
7099 | } | |
7100 | } | |
7101 | else | |
7102 | { | |
7103 | if (exprNode_isDefined (e2)) | |
7104 | { | |
7105 | ret->exitCode = e2->exitCode; | |
7106 | ret->mustBreak = e2->mustBreak; | |
7107 | ret->canBreak = e2->canBreak; | |
7108 | } | |
7109 | } | |
7110 | ||
7111 | return (ret); | |
7112 | } | |
7113 | ||
7114 | static bool exprNode_checkOneInit (/*@notnull@*/ exprNode el, exprNode val) | |
7115 | { | |
7116 | ctype t1 = exprNode_getType (el); | |
7117 | ctype t2 = exprNode_getType (val); | |
7118 | bool hasError = FALSE; | |
7119 | ||
7120 | if (ctype_isUnknown (t1)) | |
7121 | { | |
7122 | voptgenerror (FLG_IMPTYPE, | |
7123 | message ("Variable has unknown (implicitly int) type: %s", | |
7124 | exprNode_unparse (el)), | |
7125 | el->loc); | |
7126 | ||
7127 | t1 = ctype_int; | |
7128 | el->typ = ctype_int; | |
7129 | } | |
7130 | ||
7131 | if (exprNode_isDefined (val) && val->kind == XPR_INITBLOCK) | |
7132 | { | |
7133 | exprNodeList vals = exprData_getArgs (val->edata); | |
7134 | ||
7135 | if (ctype_isRealAP (t1)) | |
7136 | { | |
7137 | int i = 0; | |
7138 | int nerrors = 0; | |
7139 | ||
7140 | exprNodeList_elements (vals, oneval) | |
7141 | { | |
7142 | cstring istring = message ("%d", i); | |
7143 | exprNode newel = | |
7144 | exprNode_arrayFetch | |
7145 | (exprNode_fakeCopy (el), | |
7146 | exprNode_numLiteral (ctype_int, istring, | |
7147 | fileloc_copy (el->loc), i)); | |
7148 | ||
7149 | if (exprNode_isDefined (newel)) | |
7150 | { | |
7151 | if (exprNodeList_size (vals) == 1 | |
7152 | && ctype_isString (exprNode_getType (oneval)) | |
7153 | && ctype_isChar (exprNode_getType (newel))) | |
7154 | { | |
7155 | exprNode_freeIniter (newel); | |
7156 | } | |
7157 | else | |
7158 | { | |
7159 | if (exprNode_checkOneInit (newel, oneval)) | |
7160 | { | |
7161 | hasError = TRUE; | |
7162 | nerrors++; | |
7163 | ||
7164 | if (nerrors > 3 && exprNodeList_size (vals) > 6) | |
7165 | { | |
7166 | llgenmsg | |
7167 | (message ("Additional initialization errors " | |
7168 | "for %s not reported", | |
7169 | exprNode_unparse (el)), | |
7170 | exprNode_loc (el)); | |
7171 | exprNode_freeIniter (newel); | |
7172 | break; | |
7173 | } | |
7174 | else | |
7175 | { | |
7176 | exprNode_freeIniter (newel); | |
7177 | } | |
7178 | } | |
7179 | else | |
7180 | { | |
7181 | exprNode_freeIniter (newel); | |
7182 | } | |
7183 | } | |
7184 | } | |
7185 | ||
7186 | cstring_free (istring); | |
7187 | i++; | |
7188 | /*@-branchstate@*/ | |
7189 | } end_exprNodeList_elements; | |
7190 | /*@=branchstate@*/ | |
7191 | } | |
7192 | else if (ctype_isStruct (ctype_realType (t1))) | |
7193 | { | |
7194 | uentryList fields = ctype_getFields (t1); | |
7195 | int i = 0; | |
7196 | ||
7197 | if (uentryList_size (fields) != exprNodeList_size (vals)) | |
7198 | { | |
7199 | if (uentryList_size (fields) > exprNodeList_size (vals)) | |
7200 | { | |
7201 | hasError = optgenerror | |
7202 | (FLG_FULLINITBLOCK, | |
7203 | message ("Initializer block for " | |
7204 | "%s has %d field%p, but %s has %d field%p: %q", | |
7205 | exprNode_unparse (el), | |
7206 | exprNodeList_size (vals), | |
7207 | ctype_unparse (t1), | |
7208 | uentryList_size (fields), | |
7209 | exprNodeList_unparse (vals)), | |
7210 | val->loc); | |
7211 | } | |
7212 | else | |
7213 | { | |
7214 | hasError = optgenerror | |
7215 | (FLG_TYPE, | |
7216 | message ("Initializer block for " | |
7217 | "%s has %d field%p, but %s has %d field%p: %q", | |
7218 | exprNode_unparse (el), | |
7219 | exprNodeList_size (vals), | |
7220 | ctype_unparse (t1), | |
7221 | uentryList_size (fields), | |
7222 | exprNodeList_unparse (vals)), | |
7223 | val->loc); | |
7224 | } | |
7225 | } | |
7226 | else | |
7227 | { | |
7228 | exprNodeList_elements (vals, oneval) | |
7229 | { | |
7230 | uentry thisfield = uentryList_getN (fields, i); | |
7231 | exprNode newel = | |
7232 | exprNode_fieldAccess (exprNode_fakeCopy (el), | |
7233 | uentry_getName (thisfield)); | |
7234 | ||
7235 | if (exprNode_isDefined (newel)) | |
7236 | { | |
7237 | if (exprNode_checkOneInit (newel, oneval)) | |
7238 | { | |
7239 | hasError = TRUE; | |
7240 | } | |
7241 | ||
7242 | exprNode_freeIniter (newel); | |
7243 | } | |
7244 | ||
7245 | i++; | |
7246 | } end_exprNodeList_elements; | |
7247 | } | |
7248 | } | |
7249 | else | |
7250 | { | |
7251 | hasError = optgenerror | |
7252 | (FLG_TYPE, | |
7253 | message ("Initializer block used for " | |
7254 | "%s where %t is expected: %s", | |
7255 | exprNode_unparse (el), t1, exprNode_unparse (val)), | |
7256 | val->loc); | |
7257 | } | |
7258 | } | |
7259 | else | |
7260 | { | |
7261 | if (exprNode_isDefined (val)) | |
7262 | { | |
7263 | doAssign (el, val, TRUE); | |
7264 | ||
7265 | if (!exprNode_matchType (t1, val)) | |
7266 | { | |
7267 | hasError = gentypeerror | |
7268 | (t1, val, t2, el, | |
7269 | message ("Initial value of %s is type %t, " | |
7270 | "expects %t: %s", | |
7271 | exprNode_unparse (el), | |
7272 | t2, t1, exprNode_unparse (val)), | |
7273 | val->loc); | |
7274 | } | |
7275 | } | |
7276 | } | |
7277 | ||
7278 | return hasError; | |
7279 | } | |
7280 | ||
7281 | exprNode exprNode_makeInitialization (/*@only@*/ idDecl t, | |
7282 | /*@only@*/ exprNode e) | |
7283 | { | |
7284 | uentry ue = usymtab_lookup (idDecl_observeId (t)); | |
7285 | bool isUsed = uentry_isUsed (ue); | |
7286 | exprNode ret = exprNode_fromIdentifierAux (ue); | |
7287 | ctype ct = ctype_realishType (ret->typ); | |
7288 | fileloc loc; | |
7289 | ||
7290 | if (ctype_isUnknown (ct)) | |
7291 | { | |
7292 | voptgenerror (FLG_IMPTYPE, | |
7293 | message ("Variable has unknown (implicitly int) type: %s", | |
7294 | idDecl_getName (t)), | |
7295 | exprNode_isDefined (e) ? exprNode_loc (e) : g_currentloc); | |
7296 | ||
7297 | ct = ctype_int; | |
7298 | } | |
7299 | ||
7300 | if (exprNode_isError (e)) | |
7301 | { | |
7302 | e = exprNode_createUnknown (); | |
7303 | loc = g_currentloc; | |
7304 | ||
7305 | /* error: assume initializer is defined */ | |
7306 | sRef_setDefined (ret->sref, loc); | |
7307 | } | |
7308 | else | |
7309 | { | |
7310 | loc = exprNode_loc (e); | |
7311 | ||
7312 | /* | |
7313 | ** evs - 9 Apr 1995 | |
7314 | ** | |
7315 | ** was addSafeUse --- what's the problem? | |
7316 | ** | |
7317 | ** int x = 3, y = x ? | |
7318 | */ | |
7319 | ||
7320 | exprNode_checkUse (ret, e->sref, e->loc); | |
7321 | ||
7322 | if (ctype_isUnknown (e->typ) && uentry_isValid (ue)) | |
7323 | { | |
7324 | exprNode lhs = exprNode_createId (ue); | |
7325 | ||
7326 | /* | |
7327 | ** static storage should be undefined before initializing | |
7328 | */ | |
7329 | ||
7330 | if (uentry_isStatic (ue)) | |
7331 | { | |
7332 | sRef_setDefState (lhs->sref, SS_PARTIAL, fileloc_undefined); | |
7333 | } | |
7334 | ||
7335 | (void) exprNode_checkOneInit (lhs, e); | |
7336 | ||
7337 | if (uentry_isStatic (ue)) | |
7338 | { | |
7339 | sRef_setDefState (lhs->sref, SS_DEFINED, fileloc_undefined); | |
7340 | } | |
7341 | ||
7342 | exprNode_free (lhs); | |
7343 | } | |
7344 | else | |
7345 | { | |
7346 | if (!exprNode_matchType (ct, e)) | |
7347 | { | |
7348 | if (exprNode_isZero (e) && ctype_isArrayPtr (ct)) | |
7349 | { | |
7350 | ; | |
7351 | } | |
7352 | else | |
7353 | { | |
7354 | (void) gentypeerror | |
7355 | (exprNode_getType (e), e, exprNode_getType (ret), ret, | |
7356 | message | |
7357 | ("Variable %s initialized to type %t, expects %t: %s", | |
7358 | exprNode_unparse (ret), exprNode_getType (e), | |
7359 | exprNode_getType (ret), | |
7360 | exprNode_unparse (e)), | |
7361 | e->loc); | |
7362 | } | |
7363 | } | |
7364 | } | |
7365 | ||
7366 | if (uentry_isStatic (ue)) | |
7367 | { | |
7368 | sRef_setDefState (ret->sref, SS_PARTIAL, fileloc_undefined); | |
7369 | } | |
7370 | ||
7371 | doAssign (ret, e, TRUE); | |
7372 | ||
7373 | if (uentry_isStatic (ue)) | |
7374 | { | |
7375 | sRef_setDefState (ret->sref, SS_DEFINED, fileloc_undefined); | |
7376 | } | |
7377 | } | |
7378 | ||
7379 | if (context_inIterDef ()) | |
7380 | { | |
7381 | /* should check if it is yield */ | |
7382 | uentry_setUsed (ue, loc); | |
7383 | } | |
7384 | else | |
7385 | { | |
7386 | if (!isUsed) /* could be @unused@-qualified variable */ | |
7387 | { | |
7388 | uentry_setNotUsed (ue); | |
7389 | } | |
7390 | } | |
7391 | ||
7392 | ret->exitCode = XK_NEVERESCAPE; | |
7393 | ret->mustBreak = FALSE; | |
7394 | ||
7395 | /* | |
7396 | ** Must be before new kind is assigned! | |
7397 | */ | |
7398 | ||
7399 | exprData_free (ret->edata, ret->kind); | |
7400 | ||
7401 | ret->kind = XPR_INIT; | |
7402 | ret->edata = exprData_makeInit (t, e); | |
7403 | exprNode_mergeUSs (ret, e); | |
7404 | return ret; | |
7405 | } | |
7406 | ||
7407 | exprNode exprNode_iter (/*@observer@*/ uentry name, | |
7408 | /*@only@*/ exprNodeList alist, | |
7409 | /*@only@*/ exprNode body, | |
7410 | /*@observer@*/ uentry end) | |
7411 | { | |
7412 | exprNode ret; | |
7413 | cstring iname; | |
7414 | ||
7415 | llassert (uentry_isValid (name)); | |
7416 | ||
7417 | uentry_setUsed (name, exprNode_loc (body)); | |
7418 | ||
7419 | ret = exprNode_createPartialCopy (body); | |
7420 | iname = uentry_getName (name); | |
7421 | ||
7422 | if (uentry_isInvalid (end)) | |
7423 | { | |
7424 | llerror (FLG_ITER, | |
7425 | message ("Iter %s not balanced with end_%s", iname, iname)); | |
7426 | } | |
7427 | else | |
7428 | { | |
7429 | cstring ename = uentry_getName (end); | |
7430 | ||
7431 | if (!cstring_equalPrefix (ename, "end_")) | |
7432 | { | |
7433 | llerror (FLG_ITER, message ("Iter %s not balanced with end_%s: %s", | |
7434 | iname, iname, ename)); | |
7435 | } | |
7436 | else | |
7437 | { | |
7438 | if (!cstring_equal (iname, cstring_suffix (ename, 4))) | |
7439 | { | |
7440 | llerror (FLG_ITER, | |
7441 | message ("Iter %s not balanced with end_%s: %s", | |
7442 | iname, iname, ename)); | |
7443 | } | |
7444 | } | |
7445 | ||
7446 | cstring_free (ename); | |
7447 | } | |
7448 | ||
7449 | context_exitIterClause (body); | |
7450 | ||
7451 | ret->kind = XPR_ITER; | |
7452 | ret->edata = exprData_makeIter (name, alist, body, end); | |
7453 | ||
7454 | if (uentry_isIter (name)) | |
7455 | { | |
7456 | (void) checkArgsReal (name, body, | |
7457 | uentry_getParams (name), alist, TRUE, ret); | |
7458 | } | |
7459 | ||
7460 | cstring_free (iname); | |
7461 | ||
7462 | return ret; | |
7463 | } | |
7464 | ||
7465 | exprNode | |
7466 | exprNode_iterNewId (/*@only@*/ cstring s) | |
7467 | { | |
7468 | exprNode e = exprNode_new (); | |
7469 | uentry ue = uentryList_getN (uentry_getParams (getCurrentIter ()), iterParamNo ()); | |
7470 | ||
7471 | llassert (processingIterVars ()); | |
7472 | ||
7473 | e->loc = context_getSaveLocation (); | |
7474 | ||
7475 | if (fileloc_isUndefined (e->loc)) | |
7476 | { | |
7477 | fileloc_free (e->loc); | |
7478 | e->loc = fileloc_copy (g_currentloc); | |
7479 | } | |
7480 | ||
7481 | e->uses = sRefSet_new (); | |
7482 | e->sets = sRefSet_new (); | |
7483 | e->msets = sRefSet_new (); | |
7484 | e->kind = XPR_VAR; | |
7485 | e->val = multiVal_unknown (); | |
7486 | e->guards = guardSet_new (); | |
7487 | e->sref = defref; | |
7488 | e->isJumpPoint = FALSE; | |
7489 | e->exitCode = XK_NEVERESCAPE; | |
7490 | ||
7491 | /*> missing fields, detected by lclint <*/ | |
7492 | e->canBreak = FALSE; | |
7493 | e->mustBreak = FALSE; | |
7494 | e->etext = cstring_undefined; | |
7495 | ||
7496 | if (uentry_isYield (ue)) | |
7497 | { | |
7498 | uentry uue = uentry_makeVariable (s, uentry_getType (ue), | |
7499 | fileloc_copy (e->loc), | |
7500 | FALSE); | |
7501 | sRef sr; | |
7502 | ||
7503 | uue = usymtab_supEntrySrefReturn (uue); | |
7504 | ||
7505 | sr = uentry_getSref (uue); | |
7506 | sRef_mergeStateQuiet (sr, uentry_getSref (ue)); | |
7507 | sr = uentry_getSref (uue); | |
7508 | sRef_setDefined (sr, e->loc); | |
7509 | ||
7510 | e->typ = uentry_getType (uue); | |
7511 | e->sref = sr; | |
7512 | e->edata = exprData_makeId (uue); | |
7513 | uentry_setUsed (uue, g_currentloc); | |
7514 | } | |
7515 | else | |
7516 | { | |
7517 | uentry uue; | |
7518 | ||
7519 | sRef_setGlobalScope (); | |
7520 | uue = uentry_makeVariableLoc (s, ctype_unknown); | |
7521 | ||
7522 | e->typ = ctype_unknown; | |
7523 | e->edata = exprData_makeId (uue); | |
7524 | ||
7525 | uentry_setUsed (uue, e->loc); | |
7526 | uentry_setHasNameError (uue); | |
7527 | ||
7528 | if (context_getFlag (FLG_REPEATUNRECOG)) | |
7529 | { | |
7530 | uentry_markOwned (uue); | |
7531 | } | |
7532 | else | |
7533 | { | |
7534 | usymtab_supGlobalEntry (uue); | |
7535 | } | |
7536 | ||
7537 | sRef_clearGlobalScope (); | |
7538 | ||
7539 | voptgenerror (FLG_UNRECOG, message ("Unrecognized identifier: %s", s), | |
7540 | e->loc); | |
7541 | } | |
7542 | ||
7543 | ||
7544 | cstring_free (s); | |
84c9ffbf | 7545 | |
7546 | exprNode_defineConstraints(e); | |
616915dd | 7547 | return (e); |
7548 | } | |
7549 | ||
7550 | exprNode | |
7551 | exprNode_iterExpr (/*@returned@*/ exprNode e) | |
7552 | { | |
7553 | if (!processingIterVars ()) | |
7554 | { | |
7555 | llcontbuglit ("checkIterParam: not in iter"); | |
7556 | return e; | |
7557 | } | |
7558 | ||
7559 | if (uentry_isYield (uentryList_getN (uentry_getParams (getCurrentIter ()), | |
7560 | iterParamNo ()))) | |
7561 | { | |
7562 | if (exprNode_isDefined (e)) | |
7563 | { | |
7564 | if (fileloc_isDefined (e->loc)) | |
7565 | { | |
7566 | voptgenerror | |
7567 | (FLG_ITER, | |
7568 | message ("Yield parameter is not simple identifier: %s", | |
7569 | exprNode_unparse (e)), | |
7570 | e->loc); | |
7571 | } | |
7572 | else | |
7573 | { | |
7574 | voptgenerror | |
7575 | (FLG_ITER, | |
7576 | message ("Yield parameter is not simple identifier: %s", | |
7577 | exprNode_unparse (e)), | |
7578 | g_currentloc); | |
7579 | ||
7580 | } | |
7581 | } | |
7582 | } | |
7583 | return e; | |
7584 | } | |
7585 | ||
7586 | exprNode | |
7587 | exprNode_iterId (/*@observer@*/ uentry c) | |
7588 | { | |
7589 | uentry ue; | |
7590 | ||
7591 | llassert (processingIterVars ()); | |
7592 | ||
7593 | ue = uentryList_getN (uentry_getParams (getCurrentIter ()), | |
7594 | iterParamNo ()); | |
7595 | ||
7596 | if (uentry_isYield (ue)) | |
7597 | { | |
7598 | ctype ct = uentry_getType (ue); | |
7599 | exprNode e = exprNode_createPlain (ct); | |
7600 | cstring name = uentry_getName (c); | |
7601 | uentry le = uentry_makeVariable (name, ct, fileloc_undefined, FALSE); | |
7602 | ||
7603 | uentry_setUsed (ue, g_currentloc); | |
7604 | uentry_setHasNameError (ue); | |
7605 | ||
7606 | cstring_free (name); | |
7607 | ||
7608 | e->kind = XPR_VAR; | |
7609 | e->edata = exprData_makeId (le); | |
7610 | e->loc = context_getSaveLocation (); | |
7611 | e->sref = uentry_getSref (le); | |
7612 | ||
7613 | usymtab_supEntrySref (le); | |
7614 | ||
7615 | if (!context_inHeader ()) | |
7616 | { | |
7617 | if (optgenerror | |
7618 | (FLG_ITER, | |
7619 | message ("Yield parameter shadows local declaration: %q", | |
7620 | uentry_getName (c)), | |
7621 | fileloc_isDefined (e->loc) ? e->loc : g_currentloc)) | |
7622 | { | |
7623 | uentry_showWhereDeclared (c); | |
7624 | } | |
7625 | } | |
7626 | ||
7627 | return e; | |
7628 | } | |
7629 | ||
7630 | return (exprNode_fromIdentifierAux (c)); | |
7631 | } | |
7632 | ||
7633 | exprNode exprNode_iterStart (/*@observer@*/ uentry name, /*@only@*/ exprNodeList alist) | |
7634 | { | |
7635 | exprNode ret = exprNode_create (ctype_unknown); | |
7636 | ||
7637 | ret->kind = XPR_ITERCALL; | |
7638 | ret->edata = exprData_makeIterCall (name, alist); | |
7639 | ||
7640 | if (uentry_isIter (name)) | |
7641 | { | |
7642 | uentryList params = uentry_getParams (name); | |
7643 | ||
7644 | if (context_inIterDef () | |
7645 | && uentryList_size (params) == exprNodeList_size (alist)) | |
7646 | { | |
7647 | int i = 0; | |
7648 | ||
7649 | exprNodeList_elements (alist, arg) | |
7650 | { | |
7651 | uentry parg = uentryList_getN (params, i); | |
7652 | ||
7653 | if (uentry_isYield (parg)) | |
7654 | { | |
7655 | uentry ue = exprNode_getUentry (arg); | |
7656 | ||
7657 | if (uentry_isValid (ue)) | |
7658 | { | |
7659 | ; | |
7660 | } | |
7661 | } | |
7662 | ||
7663 | i++; | |
7664 | } end_exprNodeList_elements; | |
7665 | } | |
7666 | ||
7667 | (void) checkArgsReal (name, ret, params, alist, TRUE, ret); | |
7668 | checkUnspecCall (ret, params, alist); | |
7669 | } | |
7670 | ||
7671 | return ret; | |
7672 | } | |
7673 | ||
7674 | /*@exposed@*/ sRef exprNode_getSref (exprNode e) | |
7675 | { | |
7676 | if (exprNode_isDefined (e)) | |
7677 | { | |
7678 | /*@access sRef@*/ | |
7679 | if (e->sref == defref) /*@noaccess sRef@*/ | |
7680 | { | |
7681 | /*@-mods@*/ | |
7682 | e->sref = sRef_makeUnknown (); | |
7683 | sRef_setAliasKind (e->sref, AK_ERROR, fileloc_undefined); | |
7684 | /*@=mods@*/ | |
7685 | return e->sref; | |
7686 | } | |
7687 | else | |
7688 | { | |
7689 | return e->sref; | |
7690 | } | |
7691 | } | |
7692 | else | |
7693 | { | |
7694 | return sRef_undefined; | |
7695 | } | |
7696 | } | |
7697 | ||
7698 | /*@observer@*/ cstring | |
7699 | exprNode_unparseFirst (exprNode e) | |
7700 | { | |
7701 | if (exprNode_isDefined (e)) | |
7702 | { | |
7703 | cstring ret; | |
7704 | ||
7705 | if (e->kind == XPR_STMTLIST | |
7706 | || e->kind == XPR_COMMA || e->kind == XPR_COND) | |
7707 | { | |
7708 | exprNode first = exprData_getPairA (e->edata); | |
7709 | ||
7710 | if (exprNode_isDefined (first)) | |
7711 | { | |
7712 | return (exprNode_unparseFirst (exprData_getPairA (e->edata))); | |
7713 | } | |
7714 | else | |
7715 | { | |
7716 | return (cstring_makeLiteralTemp ("...")); | |
7717 | } | |
7718 | } | |
7719 | ||
7720 | ret = cstring_elide (exprNode_unparse (e), 20); | |
7721 | cstring_markOwned (ret); | |
7722 | ||
7723 | return (ret); | |
7724 | } | |
7725 | else | |
7726 | { | |
7727 | return cstring_makeLiteralTemp ("<error>"); | |
7728 | } | |
7729 | } | |
7730 | ||
7731 | /*@observer@*/ cstring | |
7732 | exprNode_unparse (exprNode e) | |
7733 | { | |
7734 | if (exprNode_isError (e)) | |
7735 | { | |
7736 | return cstring_makeLiteralTemp ("<error>"); | |
7737 | } | |
7738 | ||
7739 | if (cstring_isDefined (e->etext)) | |
7740 | { | |
7741 | return e->etext; | |
7742 | } | |
7743 | else | |
7744 | { | |
7745 | cstring ret = exprNode_doUnparse (e); | |
7746 | ||
7747 | /*@-modifies@*/ /* benevolent */ | |
7748 | e->etext = ret; | |
7749 | /*@=modifies@*/ | |
7750 | return ret; | |
7751 | } | |
7752 | } | |
7753 | ||
7754 | /*@observer@*/ fileloc | |
7755 | exprNode_loc (exprNode e) | |
7756 | { | |
7757 | if (exprNode_isError (e)) | |
7758 | { | |
7759 | return (g_currentloc); | |
7760 | } | |
7761 | else | |
7762 | { | |
7763 | return (e->loc); | |
7764 | } | |
7765 | } | |
7766 | ||
7767 | /* | |
7768 | ** executes exprNode e | |
7769 | ** recursively rexecutes as though in original parse using | |
7770 | ** information in e->edata | |
7771 | */ | |
7772 | ||
7773 | static /*@only@*/ exprNodeList exprNodeList_effect (exprNodeList e) | |
7774 | { | |
7775 | exprNodeList ret = exprNodeList_new (); | |
7776 | ||
7777 | exprNodeList_elements (e, current) | |
7778 | { | |
7779 | exprNodeList_addh (ret, exprNode_effect (current)); | |
7780 | } end_exprNodeList_elements; | |
7781 | ||
7782 | return ret; | |
7783 | } | |
7784 | ||
7785 | static /*@only@*/ exprNode exprNode_effect (exprNode e) | |
7786 | /*@globals internalState@*/ | |
7787 | { | |
7788 | bool innerEffect = inEffect; | |
7789 | exprNode ret; | |
7790 | exprData data; | |
7791 | ||
7792 | inEffect = TRUE; | |
7793 | ||
7794 | context_clearJustPopped (); | |
7795 | ||
7796 | if (exprNode_isError (e)) | |
7797 | { | |
7798 | ret = exprNode_undefined; | |
7799 | } | |
7800 | else | |
7801 | { | |
7802 | /* | |
7803 | ** Turn off expose and dependent transfer checking. | |
7804 | ** Need to pass exposed internal nodes, | |
7805 | ** [ copying would be a waste! ] | |
7806 | ** [ Actually, I think I wasted a lot more time than its worth ] | |
7807 | ** [ trying to do this. ] | |
7808 | */ | |
7809 | ||
7810 | /*@-exposetrans@*/ | |
7811 | /*@-observertrans@*/ | |
7812 | /*@-dependenttrans@*/ | |
7813 | ||
7814 | data = e->edata; | |
7815 | ||
7816 | switch (e->kind) | |
7817 | { | |
7818 | case XPR_PARENS: | |
7819 | ret = exprNode_addParens (exprData_getUopTok (data), | |
7820 | exprNode_effect (exprData_getUopNode (data))); | |
7821 | break; | |
7822 | case XPR_ASSIGN: | |
7823 | ret = exprNode_assign (exprNode_effect (exprData_getOpA (data)), | |
7824 | exprNode_effect (exprData_getOpB (data)), | |
7825 | exprData_getOpTok (data)); | |
7826 | break; | |
7827 | case XPR_INITBLOCK: | |
7828 | ret = exprNode_undefined; | |
7829 | break; | |
7830 | case XPR_CALL: | |
7831 | ret = exprNode_functionCall (exprNode_effect (exprData_getFcn (data)), | |
7832 | exprNodeList_effect (exprData_getArgs (data))); | |
7833 | break; | |
7834 | case XPR_EMPTY: | |
7835 | ret = e; | |
7836 | break; | |
7837 | ||
7838 | case XPR_LABEL: | |
7839 | ret = e; | |
7840 | break; | |
7841 | ||
7842 | case XPR_CONST: | |
7843 | case XPR_VAR: | |
7844 | { | |
7845 | cstring id = exprData_getId (data); | |
7846 | uentry ue = usymtab_lookupSafe (id); | |
7847 | ||
7848 | ret = exprNode_fromIdentifierAux (ue); | |
7849 | ret->loc = fileloc_update (ret->loc, e->loc); | |
7850 | break; | |
7851 | } | |
7852 | case XPR_BODY: | |
7853 | ret = e; | |
7854 | break; | |
7855 | case XPR_FETCH: | |
7856 | ret = exprNode_arrayFetch (exprNode_effect (exprData_getPairA (data)), | |
7857 | exprNode_effect (exprData_getPairB (data))); | |
7858 | break; | |
7859 | case XPR_OP: | |
7860 | ret = exprNode_op (exprNode_effect (exprData_getOpA (data)), | |
7861 | exprNode_effect (exprData_getOpB (data)), | |
7862 | exprData_getOpTok (data)); | |
7863 | break; | |
7864 | ||
7865 | case XPR_POSTOP: | |
7866 | ret = exprNode_postOp (exprNode_effect (exprData_getUopNode (data)), | |
7867 | exprData_getUopTok (data)); | |
7868 | break; | |
7869 | case XPR_PREOP: | |
7870 | ret = exprNode_preOp (exprNode_effect (exprData_getUopNode (data)), | |
7871 | exprData_getUopTok (data)); | |
7872 | break; | |
7873 | ||
7874 | case XPR_OFFSETOF: | |
7875 | case XPR_SIZEOFT: | |
7876 | case XPR_SIZEOF: | |
7877 | case XPR_ALIGNOFT: | |
7878 | case XPR_ALIGNOF: | |
7879 | ret = e; | |
7880 | break; | |
7881 | ||
7882 | case XPR_VAARG: | |
7883 | ret = exprNode_vaArg (exprData_getCastTok (data), | |
7884 | exprNode_effect (exprData_getCastNode (data)), | |
7885 | exprData_getCastType (data)); | |
7886 | break; | |
7887 | ||
7888 | case XPR_CAST: | |
7889 | ret = exprNode_cast (exprData_getCastTok (data), | |
7890 | exprNode_effect (exprData_getCastNode (data)), | |
7891 | exprData_getCastType (data)); | |
7892 | break; | |
7893 | case XPR_ITERCALL: | |
7894 | ret = exprNode_iterStart (exprData_getIterCallIter (data), | |
7895 | exprNodeList_effect | |
7896 | (exprData_getIterCallArgs (data))); | |
7897 | break; | |
7898 | ||
7899 | case XPR_ITER: | |
7900 | ret = exprNode_iter (exprData_getIterSname (data), | |
7901 | exprNodeList_effect (exprData_getIterAlist (data)), | |
7902 | exprNode_effect (exprData_getIterBody (data)), | |
7903 | exprData_getIterEname (data)); | |
7904 | break; | |
7905 | ||
7906 | case XPR_FOR: | |
7907 | ret = exprNode_for (exprNode_effect (exprData_getPairA (data)), | |
7908 | exprNode_effect (exprData_getPairB (data))); | |
7909 | break; | |
7910 | ||
7911 | case XPR_FORPRED: | |
7912 | ret = exprNode_forPred (exprNode_effect (exprData_getTripleInit (data)), | |
7913 | exprNode_effect (exprData_getTripleTest (data)), | |
7914 | exprNode_effect (exprData_getTripleInc (data))); | |
7915 | break; | |
7916 | ||
7917 | case XPR_TOK: | |
7918 | ret = exprNode_createTok (exprData_getTok (data)); | |
7919 | break; | |
7920 | ||
7921 | case XPR_GOTO: | |
7922 | ret = exprNode_goto (exprData_getLiteral (data)); | |
7923 | ret->loc = fileloc_update (ret->loc, e->loc); | |
7924 | break; | |
7925 | ||
7926 | case XPR_CONTINUE: | |
7927 | ret = exprNode_continue (exprData_getTok (data), QSAFEBREAK); | |
7928 | break; | |
7929 | ||
7930 | case XPR_BREAK: | |
7931 | ret = exprNode_break (exprData_getTok (data), QSAFEBREAK); | |
7932 | break; | |
7933 | ||
7934 | case XPR_RETURN: | |
7935 | ret = exprNode_return (exprNode_effect (exprData_getSingle (data))); | |
7936 | break; | |
7937 | ||
7938 | case XPR_NULLRETURN: | |
7939 | ret = exprNode_nullReturn (exprData_getTok (data)); | |
7940 | break; | |
7941 | ||
7942 | case XPR_COMMA: | |
7943 | ret = exprNode_comma (exprNode_effect (exprData_getPairA (data)), | |
7944 | exprNode_effect (exprData_getPairB (data))); | |
7945 | break; | |
7946 | ||
7947 | case XPR_COND: | |
7948 | ret = exprNode_cond (exprNode_effect (exprData_getTriplePred (data)), | |
7949 | exprNode_effect (exprData_getTripleTrue (data)), | |
7950 | exprNode_effect (exprData_getTripleFalse (data))); | |
7951 | break; | |
7952 | case XPR_IF: | |
7953 | ret = exprNode_if (exprNode_effect (exprData_getPairA (data)), | |
7954 | exprNode_effect (exprData_getPairB (data))); | |
7955 | break; | |
7956 | ||
7957 | case XPR_IFELSE: | |
7958 | ret = exprNode_ifelse (exprNode_effect (exprData_getTriplePred (data)), | |
7959 | exprNode_effect (exprData_getTripleTrue (data)), | |
7960 | exprNode_effect (exprData_getTripleFalse (data))); | |
7961 | break; | |
7962 | case XPR_WHILEPRED: | |
7963 | ret = exprNode_whilePred (exprData_getSingle (data)); | |
7964 | break; | |
7965 | ||
7966 | case XPR_WHILE: | |
7967 | ret = exprNode_while (exprNode_effect (exprData_getPairA (data)), | |
7968 | exprNode_effect (exprData_getPairB (data))); | |
7969 | break; | |
7970 | ||
7971 | case XPR_DOWHILE: | |
7972 | ret = exprNode_doWhile (exprNode_effect (exprData_getPairA (data)), | |
7973 | exprNode_effect (exprData_getPairB (data))); | |
7974 | break; | |
7975 | ||
7976 | case XPR_BLOCK: | |
7977 | ret = exprNode_makeBlock (exprNode_effect (exprData_getSingle (data))); | |
7978 | break; | |
7979 | ||
7980 | case XPR_STMT: | |
7981 | ret = exprNode_statement (exprNode_effect (exprData_getUopNode (data)), | |
7982 | exprData_getUopTok (data)); | |
7983 | break; | |
7984 | ||
7985 | case XPR_STMTLIST: | |
7986 | ret = exprNode_concat (exprNode_effect (exprData_getPairA (data)), | |
7987 | exprNode_effect (exprData_getPairB (data))); | |
7988 | break; | |
7989 | ||
7990 | case XPR_FTCASE: | |
7991 | case XPR_CASE: | |
7992 | ret = exprNode_caseMarker | |
7993 | (exprNode_effect (exprData_getSingle (data)), | |
7994 | TRUE); | |
7995 | break; | |
7996 | ||
7997 | case XPR_FTDEFAULT: | |
7998 | case XPR_DEFAULT: | |
7999 | ret = exprNode_createTok (exprData_getTok (data)); | |
8000 | break; | |
8001 | ||
8002 | case XPR_SWITCH: | |
8003 | ret = exprNode_switch (exprNode_effect (exprData_getPairA (data)), | |
8004 | exprNode_effect (exprData_getPairB (data))); | |
8005 | break; | |
8006 | ||
8007 | case XPR_INIT: | |
8008 | ret = exprNode_makeInitialization | |
8009 | (exprData_getInitId (data), | |
8010 | exprNode_effect (exprData_getInitNode (data))); | |
8011 | break; | |
8012 | ||
8013 | case XPR_FACCESS: | |
8014 | ret = exprNode_fieldAccess (exprNode_effect (exprData_getFieldNode (data)), | |
8015 | cstring_copy (exprData_getFieldName (data))); | |
8016 | break; | |
8017 | ||
8018 | case XPR_ARROW: | |
8019 | ret = exprNode_arrowAccess (exprNode_effect (exprData_getFieldNode (data)), | |
8020 | cstring_copy (exprData_getFieldName (data))); | |
8021 | break; | |
8022 | ||
8023 | case XPR_STRINGLITERAL: | |
8024 | ret = e; | |
8025 | break; | |
8026 | ||
8027 | case XPR_NUMLIT: | |
8028 | ret = e; | |
8029 | break; | |
8030 | ||
8031 | case XPR_NODE: | |
8032 | ret = e; | |
8033 | break; | |
8034 | /*@-branchstate@*/ | |
8035 | } | |
8036 | /*@=branchstate@*/ | |
8037 | /*@=observertrans@*/ | |
8038 | /*@=exposetrans@*/ | |
8039 | /*@=dependenttrans@*/ | |
8040 | } | |
8041 | ||
8042 | if (!innerEffect) | |
8043 | { | |
8044 | inEffect = FALSE; | |
8045 | } | |
8046 | ||
8047 | return ret; | |
8048 | } | |
8049 | ||
8050 | static /*@observer@*/ cstring exprNode_rootVarName (exprNode e) | |
8051 | { | |
8052 | cstring ret; | |
8053 | exprData data; | |
8054 | ||
8055 | if (exprNode_isError (e)) | |
8056 | { | |
8057 | return cstring_undefined; | |
8058 | } | |
8059 | ||
8060 | data = e->edata; | |
8061 | ||
8062 | switch (e->kind) | |
8063 | { | |
8064 | case XPR_PARENS: | |
8065 | ret = exprNode_rootVarName (exprData_getUopNode (data)); | |
8066 | break; | |
8067 | case XPR_ASSIGN: | |
8068 | ret = exprNode_rootVarName (exprData_getOpA (data)); | |
8069 | break; | |
8070 | case XPR_CONST: | |
8071 | case XPR_VAR: | |
8072 | ret = exprData_getId (data); | |
8073 | break; | |
8074 | case XPR_LABEL: | |
8075 | case XPR_TOK: | |
8076 | case XPR_ITERCALL: | |
8077 | case XPR_EMPTY: | |
8078 | case XPR_CALL: | |
8079 | case XPR_INITBLOCK: | |
8080 | case XPR_BODY: | |
8081 | case XPR_FETCH: | |
8082 | case XPR_OP: | |
8083 | case XPR_POSTOP: | |
8084 | case XPR_PREOP: | |
8085 | case XPR_OFFSETOF: | |
8086 | case XPR_ALIGNOFT: | |
8087 | case XPR_ALIGNOF: | |
8088 | case XPR_SIZEOFT: | |
8089 | case XPR_SIZEOF: | |
8090 | case XPR_VAARG: | |
8091 | case XPR_CAST: | |
8092 | case XPR_ITER: | |
8093 | case XPR_FOR: | |
8094 | case XPR_FORPRED: | |
8095 | case XPR_BREAK: | |
8096 | case XPR_RETURN: | |
8097 | case XPR_NULLRETURN: | |
8098 | case XPR_COMMA: | |
8099 | case XPR_COND: | |
8100 | case XPR_IF: | |
8101 | case XPR_IFELSE: | |
8102 | case XPR_WHILE: | |
8103 | case XPR_WHILEPRED: | |
8104 | case XPR_DOWHILE: | |
8105 | case XPR_GOTO: | |
8106 | case XPR_CONTINUE: | |
8107 | case XPR_FTDEFAULT: | |
8108 | case XPR_DEFAULT: | |
8109 | case XPR_SWITCH: | |
8110 | case XPR_FTCASE: | |
8111 | case XPR_CASE: | |
8112 | case XPR_BLOCK: | |
8113 | case XPR_STMT: | |
8114 | case XPR_STMTLIST: | |
8115 | case XPR_INIT: | |
8116 | case XPR_FACCESS: | |
8117 | case XPR_ARROW: | |
8118 | case XPR_NODE: | |
8119 | case XPR_NUMLIT: | |
8120 | case XPR_STRINGLITERAL: | |
8121 | ret = cstring_undefined; | |
8122 | break; | |
8123 | } | |
8124 | ||
8125 | return ret; | |
8126 | } | |
8127 | ||
8128 | ||
8129 | static /*@only@*/ cstring exprNode_doUnparse (exprNode e) | |
8130 | { | |
8131 | cstring ret; | |
8132 | exprData data; | |
8133 | ||
8134 | if (exprNode_isError (e)) | |
8135 | { | |
8136 | static /*@only@*/ cstring error = cstring_undefined; | |
8137 | ||
8138 | if (!cstring_isDefined (error)) | |
8139 | { | |
8140 | error = cstring_makeLiteral ("<error>"); | |
8141 | } | |
8142 | ||
8143 | return error; | |
8144 | } | |
8145 | ||
8146 | data = e->edata; | |
8147 | ||
8148 | switch (e->kind) | |
8149 | { | |
8150 | case XPR_PARENS: | |
8151 | ret = message ("(%s)", exprNode_unparse (exprData_getUopNode (e->edata))); | |
8152 | break; | |
8153 | case XPR_ASSIGN: | |
8154 | ret = message ("%s %s %s", | |
8155 | exprNode_unparse (exprData_getOpA (data)), | |
8156 | lltok_unparse (exprData_getOpTok (data)), | |
8157 | exprNode_unparse (exprData_getOpB (data))); | |
8158 | break; | |
8159 | case XPR_CALL: | |
8160 | ret = message ("%s(%q)", | |
8161 | exprNode_unparse (exprData_getFcn (data)), | |
8162 | exprNodeList_unparse (exprData_getArgs (data))); | |
8163 | break; | |
8164 | case XPR_INITBLOCK: | |
8165 | ret = message ("{ %q }", exprNodeList_unparse (exprData_getArgs (data))); | |
8166 | break; | |
8167 | case XPR_EMPTY: | |
8168 | ret = cstring_undefined; | |
8169 | break; | |
8170 | case XPR_LABEL: | |
8171 | ret = message ("%s:", exprData_getId (data)); | |
8172 | break; | |
8173 | case XPR_CONST: | |
8174 | case XPR_VAR: | |
8175 | ret = cstring_copy (exprData_getId (data)); | |
8176 | break; | |
8177 | case XPR_FETCH: | |
8178 | ret = message ("%s[%s]", exprNode_unparse (exprData_getPairA (data)), | |
8179 | exprNode_unparse (exprData_getPairB (data))); | |
8180 | break; | |
8181 | case XPR_BODY: | |
8182 | ret = message ("<body>"); | |
8183 | break; | |
8184 | case XPR_OP: | |
8185 | ret = message ("%s %s %s", | |
8186 | exprNode_unparse (exprData_getOpA (data)), | |
8187 | lltok_unparse (exprData_getOpTok (data)), | |
8188 | exprNode_unparse (exprData_getOpB (data))); | |
8189 | break; | |
8190 | ||
8191 | case XPR_PREOP: | |
8192 | ret = message ("%s%s", | |
8193 | lltok_unparse (exprData_getUopTok (data)), | |
8194 | exprNode_unparse (exprData_getUopNode (data))); | |
8195 | break; | |
8196 | ||
8197 | case XPR_POSTOP: | |
8198 | ret = message ("%s%s", | |
8199 | exprNode_unparse (exprData_getUopNode (data)), | |
8200 | lltok_unparse (exprData_getUopTok (data))); | |
8201 | break; | |
8202 | ||
8203 | case XPR_OFFSETOF: | |
8204 | ret = message ("offsetof(%s,%q)", | |
8205 | ctype_unparse (qtype_getType (exprData_getOffsetType (data))), | |
8206 | cstringList_unparseSep (exprData_getOffsetName (data), cstring_makeLiteralTemp ("."))); | |
8207 | break; | |
8208 | ||
8209 | case XPR_SIZEOFT: | |
8210 | ret = message ("sizeof(%s)", ctype_unparse (qtype_getType (exprData_getType (data)))); | |
8211 | break; | |
8212 | ||
8213 | case XPR_SIZEOF: | |
8214 | ret = message ("sizeof(%s)", exprNode_unparse (exprData_getSingle (data))); | |
8215 | break; | |
8216 | ||
8217 | case XPR_ALIGNOFT: | |
8218 | ret = message ("alignof(%s)", ctype_unparse (qtype_getType (exprData_getType (data)))); | |
8219 | break; | |
8220 | ||
8221 | case XPR_ALIGNOF: | |
8222 | ret = message ("alignof(%s)", exprNode_unparse (exprData_getSingle (data))); | |
8223 | break; | |
8224 | ||
8225 | case XPR_VAARG: | |
8226 | ret = message ("va_arg(%s, %q)", | |
8227 | exprNode_unparse (exprData_getCastNode (data)), | |
8228 | qtype_unparse (exprData_getCastType (data))); | |
8229 | break; | |
8230 | ||
8231 | case XPR_ITERCALL: | |
8232 | ret = message ("%q(%q)", | |
8233 | uentry_getName (exprData_getIterCallIter (data)), | |
8234 | exprNodeList_unparse (exprData_getIterCallArgs (data))); | |
8235 | break; | |
8236 | case XPR_ITER: | |
8237 | ret = message ("%q(%q) %s %q", | |
8238 | uentry_getName (exprData_getIterSname (data)), | |
8239 | exprNodeList_unparse (exprData_getIterAlist (data)), | |
8240 | exprNode_unparse (exprData_getIterBody (data)), | |
8241 | uentry_getName (exprData_getIterEname (data))); | |
8242 | break; | |
8243 | case XPR_CAST: | |
8244 | ret = message ("(%q)%s", | |
8245 | qtype_unparse (exprData_getCastType (data)), | |
8246 | exprNode_unparse (exprData_getCastNode (data))); | |
8247 | break; | |
8248 | ||
8249 | case XPR_FOR: | |
8250 | ret = message ("%s %s", | |
8251 | exprNode_unparse (exprData_getPairA (data)), | |
8252 | exprNode_unparse (exprData_getPairB (data))); | |
8253 | break; | |
8254 | ||
8255 | case XPR_FORPRED: | |
8256 | ret = message ("for (%s; %s; %s)", | |
8257 | exprNode_unparse (exprData_getTripleInit (data)), | |
8258 | exprNode_unparse (exprData_getTripleTest (data)), | |
8259 | exprNode_unparse (exprData_getTripleInc (data))); | |
8260 | break; | |
8261 | ||
8262 | case XPR_GOTO: | |
8263 | ret = message ("goto %s", exprData_getLiteral (data)); | |
8264 | break; | |
8265 | ||
8266 | case XPR_CONTINUE: | |
8267 | ret = cstring_makeLiteral ("continue"); | |
8268 | break; | |
8269 | ||
8270 | case XPR_BREAK: | |
8271 | ret = cstring_makeLiteral ("break"); | |
8272 | break; | |
8273 | ||
8274 | case XPR_RETURN: | |
8275 | ret = message ("return %s", exprNode_unparse (exprData_getSingle (data))); | |
8276 | break; | |
8277 | ||
8278 | case XPR_NULLRETURN: | |
8279 | ret = cstring_makeLiteral ("return"); | |
8280 | break; | |
8281 | ||
8282 | case XPR_COMMA: | |
8283 | ret = message ("%s, %s", | |
8284 | exprNode_unparse (exprData_getPairA (data)), | |
8285 | exprNode_unparse (exprData_getPairB (data))); | |
8286 | break; | |
8287 | ||
8288 | case XPR_COND: | |
8289 | ret = message ("%s ? %s : %s", | |
8290 | exprNode_unparse (exprData_getTriplePred (data)), | |
8291 | exprNode_unparse (exprData_getTripleTrue (data)), | |
8292 | exprNode_unparse (exprData_getTripleFalse (data))); | |
8293 | break; | |
8294 | case XPR_IF: | |
8295 | ret = message ("if (%s) %s", | |
8296 | exprNode_unparse (exprData_getPairA (data)), | |
8297 | exprNode_unparse (exprData_getPairB (data))); | |
8298 | break; | |
8299 | ||
8300 | case XPR_IFELSE: | |
8301 | ret = message ("if (%s) %s else %s", | |
8302 | exprNode_unparse (exprData_getTriplePred (data)), | |
8303 | exprNode_unparse (exprData_getTripleTrue (data)), | |
8304 | exprNode_unparse (exprData_getTripleFalse (data))); | |
8305 | break; | |
8306 | case XPR_WHILE: | |
8307 | ret = message ("while (%s) %s", | |
8308 | exprNode_unparse (exprData_getPairA (data)), | |
8309 | exprNode_unparse (exprData_getPairB (data))); | |
8310 | break; | |
8311 | ||
8312 | case XPR_WHILEPRED: | |
8313 | ret = cstring_copy (exprNode_unparse (exprData_getSingle (data))); | |
8314 | break; | |
8315 | ||
8316 | case XPR_TOK: | |
8317 | ret = cstring_copy (lltok_unparse (exprData_getTok (data))); | |
8318 | break; | |
8319 | ||
8320 | case XPR_DOWHILE: | |
8321 | ret = message ("do { %s } while (%s)", | |
8322 | exprNode_unparse (exprData_getPairB (data)), | |
8323 | exprNode_unparse (exprData_getPairA (data))); | |
8324 | break; | |
8325 | ||
8326 | case XPR_BLOCK: | |
8327 | ret = message ("{ %s }", exprNode_unparseFirst (exprData_getSingle (data))); | |
8328 | break; | |
8329 | ||
8330 | case XPR_STMT: | |
8331 | ret = cstring_copy (exprNode_unparse (exprData_getUopNode (data))); | |
8332 | break; | |
8333 | ||
8334 | case XPR_STMTLIST: | |
8335 | ret = message ("%s; %s", | |
8336 | exprNode_unparse (exprData_getPairA (data)), | |
8337 | exprNode_unparse (exprData_getPairB (data))); | |
8338 | break; | |
8339 | ||
8340 | case XPR_FTDEFAULT: | |
8341 | case XPR_DEFAULT: | |
8342 | ret = cstring_makeLiteral ("default:"); | |
8343 | break; | |
8344 | ||
8345 | case XPR_SWITCH: | |
8346 | ret = message ("switch (%s) %s", | |
8347 | exprNode_unparse (exprData_getPairA (data)), | |
8348 | exprNode_unparse (exprData_getPairB (data))); | |
8349 | break; | |
8350 | ||
8351 | case XPR_FTCASE: | |
8352 | case XPR_CASE: | |
8353 | ret = message ("case %s:", | |
8354 | exprNode_unparse (exprData_getSingle (data))); | |
8355 | break; | |
8356 | ||
8357 | case XPR_INIT: | |
8358 | ret = message ("%s = %s", | |
8359 | idDecl_getName (exprData_getInitId (data)), | |
8360 | exprNode_unparse (exprData_getInitNode (data))); | |
8361 | break; | |
8362 | ||
8363 | case XPR_FACCESS: | |
8364 | ret = message ("%s.%s", | |
8365 | exprNode_unparse (exprData_getFieldNode (data)), | |
8366 | exprData_getFieldName (data)); | |
8367 | break; | |
8368 | ||
8369 | case XPR_ARROW: | |
8370 | ret = message ("%s->%s", | |
8371 | exprNode_unparse (exprData_getFieldNode (data)), | |
8372 | exprData_getFieldName (data)); | |
8373 | break; | |
8374 | ||
8375 | case XPR_STRINGLITERAL: | |
8376 | ret = cstring_copy (exprData_getLiteral (data)); | |
8377 | break; | |
8378 | ||
8379 | case XPR_NUMLIT: | |
8380 | ret = cstring_copy (exprData_getLiteral (data)); | |
8381 | break; | |
8382 | ||
8383 | case XPR_NODE: | |
8384 | ret = cstring_makeLiteral ("<node>"); | |
8385 | break; | |
8386 | } | |
8387 | ||
8388 | return ret; | |
8389 | } | |
8390 | ||
8391 | bool | |
8392 | exprNode_isCharLit (exprNode e) | |
8393 | { | |
8394 | if (exprNode_isDefined (e)) | |
8395 | { | |
8396 | return (multiVal_isChar (exprNode_getValue (e))); | |
8397 | } | |
8398 | else | |
8399 | { | |
8400 | return FALSE; | |
8401 | } | |
8402 | } | |
8403 | ||
8404 | bool | |
8405 | exprNode_isNumLit (exprNode e) | |
8406 | { | |
8407 | if (exprNode_isDefined (e)) | |
8408 | { | |
8409 | return (multiVal_isInt (exprNode_getValue (e))); | |
8410 | } | |
8411 | else | |
8412 | { | |
8413 | return FALSE; | |
8414 | } | |
8415 | } | |
8416 | ||
8417 | static bool | |
8418 | exprNode_isFalseConstant (exprNode e) | |
8419 | { | |
8420 | if (exprNode_isDefined (e)) | |
8421 | { | |
8422 | cstring s = exprNode_rootVarName (e); | |
8423 | ||
8424 | if (cstring_equal (s, context_getFalseName ())) | |
8425 | { | |
8426 | return TRUE; | |
8427 | } | |
8428 | } | |
8429 | ||
8430 | return FALSE; | |
8431 | } | |
8432 | ||
8433 | bool | |
8434 | exprNode_matchLiteral (ctype expected, exprNode e) | |
8435 | { | |
8436 | if (exprNode_isDefined (e)) | |
8437 | { | |
8438 | multiVal m = exprNode_getValue (e); | |
8439 | ||
8440 | if (multiVal_isDefined (m)) | |
8441 | { | |
8442 | if (multiVal_isInt (m)) | |
8443 | { | |
8444 | long int val = multiVal_forceInt (m); | |
8445 | ||
8446 | if (ctype_isDirectBool (ctype_realishType (expected))) | |
8447 | { | |
8448 | if (val == 0) | |
8449 | { | |
8450 | return FALSE; /* really?! return TRUE; allow use of 0 for FALSE */ | |
8451 | } | |
8452 | else | |
8453 | { | |
8454 | return FALSE; | |
8455 | } | |
8456 | } | |
8457 | ||
8458 | if (ctype_isRealInt (expected)) | |
8459 | { | |
8460 | /* | |
8461 | ** unsigned <- [ constant >= 0 is okay ] | |
8462 | */ | |
8463 | ||
8464 | if (ctype_isUnsigned (expected)) | |
8465 | { | |
8466 | if (val < 0) | |
8467 | { | |
8468 | return FALSE; | |
8469 | } | |
8470 | } | |
8471 | ||
8472 | /* | |
8473 | ** No checks on sizes of integers...maybe add | |
8474 | ** these later. | |
8475 | */ | |
8476 | ||
8477 | DPRINTF (("Here: %s => %s", exprNode_unparse (e), ctype_unparse (expected))); | |
8478 | DPRINTF (("Type: %s / %s", ctype_unparse (exprNode_getType (e)), | |
8479 | bool_unparse (ctype_isInt (exprNode_getType (e))))); | |
8480 | ||
8481 | if (context_getFlag (FLG_NUMLITERAL) | |
8482 | && (ctype_isRegularInt (exprNode_getType (e)) || val == 0)) { | |
8483 | return TRUE; | |
8484 | } else { | |
8485 | if (val == 0) { | |
8486 | return TRUE; | |
8487 | } else { | |
8488 | return FALSE; /* evs 2000-05-17: previously, always returned TRUE */ | |
8489 | } | |
8490 | } | |
8491 | } | |
8492 | else if (ctype_isChar (expected)) | |
8493 | { | |
8494 | return FALSE; | |
8495 | } | |
8496 | else if (ctype_isArrayPtr (expected)) | |
8497 | { | |
8498 | return (val == 0); | |
8499 | } | |
8500 | else if (ctype_isAnyFloat (expected)) | |
8501 | { | |
8502 | return (context_getFlag (FLG_NUMLITERAL)); | |
8503 | } | |
8504 | else | |
8505 | { | |
8506 | return FALSE; | |
8507 | } | |
8508 | } | |
8509 | else if (multiVal_isDouble (m)) | |
8510 | { | |
8511 | if (ctype_isAnyFloat (expected)) | |
8512 | { | |
8513 | return TRUE; | |
8514 | } | |
8515 | } | |
8516 | else if (multiVal_isChar (m)) | |
8517 | { | |
8518 | char val = multiVal_forceChar (m); | |
8519 | ||
8520 | if (ctype_isChar (expected)) | |
8521 | { | |
8522 | if (ctype_isUnsigned (expected) && ((int)val) < 0) | |
8523 | { | |
8524 | return FALSE; | |
8525 | } | |
8526 | else | |
8527 | { | |
8528 | return TRUE; | |
8529 | } | |
8530 | } | |
8531 | } | |
8532 | else | |
8533 | { | |
8534 | return FALSE; | |
8535 | } | |
8536 | } | |
8537 | } | |
8538 | ||
8539 | return FALSE; | |
8540 | } | |
8541 | ||
8542 | bool | |
8543 | exprNode_matchType (ctype expected, exprNode e) | |
8544 | { | |
8545 | ctype actual; | |
8546 | ||
8547 | if (!exprNode_isDefined (e)) return TRUE; | |
8548 | ||
8549 | actual = ctype_realishType (exprNode_getType (e)); | |
8550 | ||
8551 | if (ctype_match (ctype_realishType (expected), actual)) | |
8552 | { | |
8553 | return TRUE; | |
8554 | } | |
8555 | ||
8556 | llassert (!exprNode_isError (e)); | |
8557 | return (exprNode_matchLiteral (expected, e)); | |
8558 | } | |
8559 | ||
8560 | static bool | |
8561 | exprNode_matchTypes (exprNode e1, exprNode e2) | |
8562 | { | |
8563 | ctype t1; | |
8564 | ctype t2; | |
8565 | ||
8566 | if (!exprNode_isDefined (e1)) return TRUE; | |
8567 | if (!exprNode_isDefined (e2)) return TRUE; | |
8568 | ||
8569 | /* | |
8570 | ** realish type --- keep bools, bools | |
8571 | */ | |
8572 | ||
8573 | t1 = ctype_realishType (exprNode_getType (e1)); | |
8574 | t2 = ctype_realishType (exprNode_getType (e2)); | |
8575 | ||
8576 | if (ctype_match (t1, t2)) | |
8577 | { | |
8578 | return TRUE; | |
8579 | } | |
8580 | ||
8581 | return (exprNode_matchLiteral (t1, e2) || exprNode_matchLiteral (t2, e1)); | |
8582 | } | |
8583 | ||
8584 | /* | |
8585 | ** pass e as ct | |
8586 | */ | |
8587 | ||
8588 | static bool | |
8589 | exprNode_matchArgType (ctype ct, exprNode e) | |
8590 | { | |
8591 | ctype et; | |
8592 | ||
8593 | if (!exprNode_isDefined (e)) | |
8594 | { | |
8595 | return TRUE; | |
8596 | } | |
8597 | ||
8598 | et = ctype_realType (exprNode_getType (e)); | |
8599 | ||
8600 | if (ctype_matchArg (ct, et)) return TRUE; | |
8601 | ||
8602 | llassert (!exprNode_isError (e)); | |
8603 | return (exprNode_matchLiteral (ct, e)); | |
8604 | } | |
8605 | ||
8606 | static /*@only@*/ exprNodeSList | |
8607 | exprNode_flatten (/*@dependent@*/ exprNode e) /*@*/ | |
8608 | { | |
8609 | if (exprNode_isDefined (e)) | |
8610 | { | |
8611 | if (e->kind == XPR_STMTLIST) | |
8612 | { | |
8613 | return (exprNodeSList_append | |
8614 | (exprNode_flatten (exprData_getPairA (e->edata)), | |
8615 | exprNode_flatten (exprData_getPairB (e->edata)))); | |
8616 | } | |
8617 | else if (e->kind == XPR_BLOCK) | |
8618 | { | |
8619 | return (exprNode_flatten (exprData_getSingle (e->edata))); | |
8620 | } | |
8621 | else | |
8622 | { | |
8623 | return (exprNodeSList_singleton (e)); | |
8624 | } | |
8625 | } | |
8626 | ||
8627 | return exprNodeSList_new (); | |
8628 | } | |
8629 | ||
8630 | static /*@exposed@*/ exprNode | |
8631 | exprNode_lastStatement (/*@returned@*/ exprNode e) | |
8632 | { | |
8633 | if (exprNode_isDefined (e)) | |
8634 | { | |
8635 | if (e->kind == XPR_STMTLIST) | |
8636 | { | |
8637 | exprNode b = exprData_getPairB (e->edata); | |
8638 | ||
8639 | if (exprNode_isDefined (b)) | |
8640 | { | |
8641 | return exprNode_lastStatement (b); | |
8642 | } | |
8643 | else | |
8644 | { | |
8645 | return exprNode_lastStatement (exprData_getPairA (e->edata)); | |
8646 | } | |
8647 | } | |
8648 | else if (e->kind == XPR_BLOCK) | |
8649 | { | |
8650 | return (exprNode_lastStatement (exprData_getSingle (e->edata))); | |
8651 | } | |
8652 | else | |
8653 | { | |
8654 | return (e); | |
8655 | } | |
8656 | } | |
8657 | ||
8658 | return exprNode_undefined; | |
8659 | } | |
8660 | ||
8661 | static /*@exposed@*/ exprNode | |
8662 | exprNode_firstStatement (/*@returned@*/ exprNode e) | |
8663 | { | |
8664 | if (exprNode_isDefined (e)) | |
8665 | { | |
8666 | if (e->kind == XPR_STMTLIST) | |
8667 | { | |
8668 | exprNode b = exprData_getPairA (e->edata); | |
8669 | ||
8670 | if (exprNode_isDefined (b)) | |
8671 | { | |
8672 | return exprNode_firstStatement (b); | |
8673 | } | |
8674 | else | |
8675 | { | |
8676 | return exprNode_firstStatement (exprData_getPairB (e->edata)); | |
8677 | } | |
8678 | } | |
8679 | else if (e->kind == XPR_BLOCK) | |
8680 | { | |
8681 | return (exprNode_firstStatement (exprData_getSingle (e->edata))); | |
8682 | } | |
8683 | else | |
8684 | { | |
8685 | return (e); | |
8686 | } | |
8687 | } | |
8688 | ||
8689 | return exprNode_undefined; | |
8690 | } | |
8691 | ||
8692 | static void | |
8693 | exprNode_mergeUSs (exprNode res, exprNode other) | |
8694 | { | |
8695 | if (exprNode_isDefined (res) && exprNode_isDefined (other)) | |
8696 | { | |
8697 | res->msets = sRefSet_union (res->msets, other->msets); | |
8698 | res->sets = sRefSet_union (res->sets, other->sets); | |
8699 | res->uses = sRefSet_union (res->uses, other->uses); | |
8700 | } | |
8701 | } | |
8702 | ||
8703 | static void | |
8704 | exprNode_mergeCondUSs (exprNode res, exprNode other1, exprNode other2) | |
8705 | { | |
8706 | if (exprNode_isDefined (res)) | |
8707 | { | |
8708 | if (exprNode_isDefined (other1)) | |
8709 | { | |
8710 | res->sets = sRefSet_union (res->sets, other1->sets); | |
8711 | res->msets = sRefSet_union (res->msets, other1->msets); | |
8712 | res->uses = sRefSet_union (res->uses, other1->uses); | |
8713 | } | |
8714 | if (exprNode_isDefined (other2)) | |
8715 | { | |
8716 | res->sets = sRefSet_union (res->sets, other2->sets); | |
8717 | res->msets = sRefSet_union (res->msets, other2->msets); | |
8718 | res->uses = sRefSet_union (res->uses, other2->uses); | |
8719 | } | |
8720 | } | |
8721 | } | |
8722 | ||
8723 | /* | |
8724 | ** modifies e->uses | |
8725 | ** | |
8726 | ** Reports errors is s is not defined. | |
8727 | */ | |
8728 | ||
8729 | static void | |
8730 | exprNode_addUse (exprNode e, sRef s) | |
8731 | { | |
8732 | if (exprNode_isDefined (e)) | |
8733 | { | |
8734 | e->uses = sRefSet_insert (e->uses, s); | |
8735 | } | |
8736 | } | |
8737 | ||
8738 | void | |
8739 | exprNode_checkUse (exprNode e, sRef s, fileloc loc) | |
8740 | { | |
8741 | if (sRef_isKnown (s) && !sRef_isConst (s)) | |
8742 | { | |
8743 | /* | |
8744 | ** need to check all outer types are useable | |
8745 | */ | |
8746 | ||
8747 | DPRINTF (("Check use: %s / %s", | |
8748 | exprNode_unparse (e), sRef_unparse (s))); | |
8749 | ||
8750 | exprNode_addUse (e, s); | |
8751 | ||
8752 | if (!context_inProtectVars ()) | |
8753 | { | |
8754 | /* | |
8755 | ** only report the deepest error | |
8756 | */ | |
8757 | ||
8758 | sRef errorRef = sRef_undefined; | |
8759 | sRef lastRef = sRef_undefined; | |
8760 | bool deadRef = FALSE; | |
8761 | bool unuseable = FALSE; | |
8762 | bool errorMaybe = FALSE; | |
8763 | ||
8764 | while (sRef_isValid (s) && sRef_isKnown (s)) | |
8765 | { | |
8766 | ynm readable = sRef_isReadable (s); | |
8767 | ||
8768 | if (!(ynm_toBoolStrict (readable))) | |
8769 | { | |
8770 | if (ynm_isMaybe (readable)) | |
8771 | { | |
8772 | lastRef = errorRef; | |
8773 | errorRef = s; | |
8774 | deadRef = sRef_isPossiblyDead (errorRef); | |
8775 | unuseable = sRef_isUnuseable (errorRef); | |
8776 | errorMaybe = TRUE; | |
8777 | } | |
8778 | else | |
8779 | { | |
8780 | lastRef = errorRef; | |
8781 | errorRef = s; | |
8782 | deadRef = sRef_isDead (errorRef); | |
8783 | unuseable = sRef_isUnuseable (errorRef); | |
8784 | errorMaybe = FALSE; | |
8785 | } | |
8786 | ||
8787 | if (!sRef_isPartial (s)) | |
8788 | { | |
8789 | sRef_setDefined (s, fileloc_undefined); | |
8790 | } | |
8791 | } | |
8792 | ||
8793 | s = sRef_getBaseSafe (s); | |
8794 | } /* end while */ | |
8795 | ||
8796 | if (sRef_isValid (errorRef)) | |
8797 | { | |
8798 | if (sRef_isValid (lastRef) && sRef_isField (lastRef) | |
8799 | && sRef_isPointer (errorRef)) | |
8800 | { | |
8801 | errorRef = lastRef; | |
8802 | } | |
8803 | ||
8804 | if (deadRef) | |
8805 | { | |
8806 | if (sRef_isThroughArrayFetch (errorRef)) | |
8807 | { | |
8808 | if (optgenerror | |
8809 | (FLG_STRICTUSERELEASED, | |
8810 | message ("%q %q may be used after being released", | |
8811 | sRef_unparseKindNamePlain (errorRef), | |
8812 | sRef_unparse (errorRef)), | |
8813 | loc)) | |
8814 | { | |
8815 | sRef_showRefKilled (errorRef); | |
8816 | ||
8817 | if (sRef_isKept (errorRef)) | |
8818 | { | |
8819 | sRef_clearAliasState (errorRef, loc); | |
8820 | } | |
8821 | } | |
8822 | } | |
8823 | else | |
8824 | { | |
8825 | DPRINTF (("HERE: %s", sRef_unparse (errorRef))); | |
8826 | ||
8827 | if (optgenerror | |
8828 | (FLG_USERELEASED, | |
8829 | message ("%q %q %qused after being released", | |
8830 | sRef_unparseKindNamePlain (errorRef), | |
8831 | sRef_unparse (errorRef), | |
8832 | cstring_makeLiteral (errorMaybe | |
8833 | ? "may be " : "")), | |
8834 | loc)) | |
8835 | { | |
8836 | sRef_showRefKilled (errorRef); | |
8837 | ||
8838 | if (sRef_isKept (errorRef)) | |
8839 | { | |
8840 | sRef_clearAliasState (errorRef, loc); | |
8841 | } | |
8842 | } | |
8843 | } | |
8844 | } | |
8845 | else if (unuseable) | |
8846 | { | |
8847 | if (optgenerror | |
8848 | (FLG_USEDEF, | |
8849 | message ("%q %q%qused in inconsistent state", | |
8850 | sRef_unparseKindName (errorRef), | |
8851 | sRef_unparseOpt (errorRef), | |
8852 | cstring_makeLiteral (errorMaybe ? "may be " : "")), | |
8853 | loc)) | |
8854 | { | |
8855 | sRef_showStateInconsistent (errorRef); | |
8856 | } | |
8857 | } | |
8858 | else | |
8859 | { | |
8860 | DPRINTF (("HERE: %s", sRef_unparse (errorRef))); | |
8861 | ||
8862 | voptgenerror | |
8863 | (FLG_USEDEF, | |
8864 | message ("%q %q%qused before definition", | |
8865 | sRef_unparseKindName (errorRef), | |
8866 | sRef_unparseOpt (errorRef), | |
8867 | cstring_makeLiteral (errorMaybe ? "may be " : "")), | |
8868 | loc); | |
8869 | } | |
8870 | ||
8871 | sRef_setDefined (errorRef, loc); | |
8872 | ||
8873 | if (sRef_isAddress (errorRef)) | |
8874 | { | |
8875 | sRef_setDefined (sRef_getRootBase (errorRef), loc); | |
8876 | } | |
8877 | } /* end is error */ | |
8878 | } | |
8879 | } | |
8880 | ||
8881 | setCodePoint (); | |
8882 | } | |
8883 | ||
8884 | static void | |
8885 | checkSafeUse (exprNode e, sRef s) | |
8886 | { | |
8887 | if (exprNode_isDefined (e) && sRef_isKnown (s)) | |
8888 | { | |
8889 | e->uses = sRefSet_insert (e->uses, s); | |
8890 | } | |
8891 | } | |
8892 | ||
8893 | static void | |
8894 | exprNode_checkSetAny (exprNode e, /*@dependent@*/ cstring name) | |
8895 | { | |
8896 | if (exprNode_isDefined (e)) | |
8897 | { | |
8898 | e->sets = sRefSet_insert (e->sets, sRef_makeUnconstrained (name)); | |
8899 | } | |
8900 | } | |
8901 | ||
8902 | void | |
8903 | exprNode_checkSet (exprNode e, sRef s) | |
8904 | { | |
8905 | sRef defines = sRef_undefined; | |
8906 | ||
8907 | if (sRef_isValid (s) && !sRef_isNothing (s)) | |
8908 | { | |
8909 | uentry ue = sRef_getBaseUentry (s); | |
8910 | ||
8911 | if (uentry_isValid (ue)) | |
8912 | { | |
8913 | uentry_setLset (ue); | |
8914 | } | |
8915 | ||
8916 | if (!ynm_toBoolStrict (sRef_isWriteable (s))) | |
8917 | { | |
8918 | voptgenerror (FLG_USEDEF, | |
8919 | message ("Attempt to set unuseable storage: %q", | |
8920 | sRef_unparse (s)), | |
8921 | exprNode_loc (e)); | |
8922 | } | |
8923 | ||
8924 | if (sRef_isMeaningful (s)) | |
8925 | { | |
8926 | ||
8927 | if (sRef_isDead (s)) | |
8928 | { | |
8929 | sRef base = sRef_getBaseSafe (s); | |
8930 | ||
8931 | if (sRef_isValid (base) | |
8932 | && sRef_isDead (base)) | |
8933 | { | |
8934 | sRef_setPartial (s, exprNode_loc (e)); | |
8935 | } | |
8936 | ||
8937 | defines = s; /* okay - modifies for only param */ | |
8938 | } | |
8939 | else if (sRef_isPartial (s)) | |
8940 | { | |
8941 | sRef eref = exprNode_getSref (e); | |
8942 | ||
8943 | if (!sRef_isPartial (eref)) | |
8944 | { | |
8945 | /* | |
8946 | ** should do something different here??? | |
8947 | */ | |
8948 | ||
8949 | sRef_setDefinedComplete (eref, exprNode_loc (e)); | |
8950 | } | |
8951 | else | |
8952 | { | |
8953 | sRef_setPartialDefinedComplete (eref, exprNode_loc (e)); | |
8954 | } | |
8955 | ||
8956 | if (sRef_isMeaningful (eref)) | |
8957 | { | |
8958 | defines = eref; | |
8959 | } | |
8960 | else | |
8961 | { | |
8962 | defines = s; | |
8963 | } | |
8964 | } | |
8965 | else if (sRef_isAllocated (s)) | |
8966 | { | |
8967 | sRef eref = exprNode_getSref (e); | |
8968 | ||
8969 | ||
8970 | if (!sRef_isAllocated (eref)) | |
8971 | { | |
8972 | sRef_setDefinedComplete (eref, exprNode_loc (e)); | |
8973 | } | |
8974 | else | |
8975 | { | |
8976 | sRef base = sRef_getBaseSafe (eref); | |
8977 | ||
8978 | if (sRef_isValid (base)) | |
8979 | { | |
8980 | sRef_setPdefined (base, exprNode_loc (e)); | |
8981 | } | |
8982 | } | |
8983 | ||
8984 | defines = s; | |
8985 | } | |
8986 | else | |
8987 | { | |
8988 | sRef_setDefinedNCComplete (s, exprNode_loc (e)); | |
8989 | defines = s; | |
8990 | } | |
8991 | ||
8992 | } | |
8993 | else /* not meaningful...but still need to insert it */ | |
8994 | { | |
8995 | defines = s; | |
8996 | } | |
8997 | } | |
8998 | ||
8999 | if (exprNode_isDefined (e) && sRef_isValid (defines)) | |
9000 | { | |
9001 | e->sets = sRefSet_insert (e->sets, defines); | |
9002 | } | |
9003 | } | |
9004 | ||
9005 | void | |
9006 | exprNode_checkMSet (exprNode e, sRef s) | |
9007 | { | |
9008 | if (sRef_isValid (s) && !sRef_isNothing (s)) | |
9009 | { | |
9010 | uentry ue = sRef_getBaseUentry (s); | |
9011 | ||
9012 | if (uentry_isValid (ue)) | |
9013 | { | |
9014 | uentry_setLset (ue); | |
9015 | } | |
9016 | ||
9017 | if (!ynm_toBoolStrict (sRef_isWriteable (s))) | |
9018 | { | |
9019 | voptgenerror (FLG_USEDEF, | |
9020 | message ("Attempt to set unuseable storage: %q", sRef_unparse (s)), | |
9021 | exprNode_loc (e)); | |
9022 | } | |
9023 | ||
9024 | if (sRef_isMeaningful (s)) | |
9025 | { | |
9026 | sRef_setDefinedComplete (s, exprNode_loc (e)); | |
9027 | } | |
9028 | ||
9029 | if (exprNode_isDefined (e)) | |
9030 | { | |
9031 | e->msets = sRefSet_insert (e->msets, s); | |
9032 | } | |
9033 | } | |
9034 | } | |
9035 | ||
9036 | static void | |
9037 | checkUnspecCall (/*@notnull@*/ /*@dependent@*/ exprNode fcn, uentryList params, exprNodeList args) | |
9038 | { | |
9039 | checkAnyCall (fcn, cstring_undefined, params, args, | |
9040 | FALSE, sRefSet_undefined, FALSE, 0); | |
9041 | } | |
9042 | ||
9043 | static void | |
9044 | checkOneArg (uentry ucurrent, /*@notnull@*/ exprNode current, | |
9045 | /*@dependent@*/ exprNode fcn, bool isSpec, int argno, int totargs) | |
9046 | { | |
9047 | setCodePoint (); | |
9048 | ||
9049 | if (uentry_isYield (ucurrent)) | |
9050 | { | |
9051 | sRef_setDefined (exprNode_getSref (current), exprNode_loc (current)); | |
9052 | exprNode_checkSet (current, current->sref); | |
9053 | } | |
9054 | else | |
9055 | { | |
9056 | if (uentry_isSefParam (ucurrent)) | |
9057 | { | |
9058 | sRefSet sets = current->sets; | |
9059 | sRef ref = exprNode_getSref (current); | |
9060 | ||
9061 | if (sRef_isMacroParamRef (ref)) | |
9062 | { | |
9063 | uentry ue = sRef_getUentry (ref); | |
9064 | ||
9065 | if (!uentry_isSefParam (ue)) | |
9066 | { | |
9067 | voptgenerror | |
9068 | (FLG_SEFPARAMS, | |
9069 | message | |
9070 | ("Parameter %d to %s is declared sef, but " | |
9071 | "the argument is a macro parameter declared " | |
9072 | "without sef: %s", | |
9073 | argno, exprNode_unparse (fcn), | |
9074 | exprNode_unparse (current)), | |
9075 | exprNode_loc (current)); | |
9076 | } | |
9077 | } | |
9078 | ||
9079 | if (!sRefSet_isEmpty (sets)) | |
9080 | { | |
9081 | sRefSet reported = sRefSet_undefined; | |
9082 | ||
9083 | sRefSet_realElements (current->sets, el) | |
9084 | { | |
9085 | if (sRefSet_isSameNameMember (reported, el)) | |
9086 | { | |
9087 | ; /* don't report again */ | |
9088 | } | |
9089 | else | |
9090 | { | |
9091 | if (sRef_isUnconstrained (el)) | |
9092 | { | |
9093 | voptgenerror | |
9094 | (FLG_SEFUNSPEC, | |
9095 | message | |
9096 | ("Parameter %d to %s is declared sef, but " | |
9097 | "the argument calls unconstrained function %s " | |
9098 | "(no guarantee it will not modify something): %s", | |
9099 | argno, exprNode_unparse (fcn), | |
9100 | sRef_unconstrainedName (el), | |
9101 | exprNode_unparse (current)), | |
9102 | exprNode_loc (current)); | |
9103 | } | |
9104 | else | |
9105 | { | |
9106 | voptgenerror | |
9107 | (FLG_SEFPARAMS, | |
9108 | message | |
9109 | ("Parameter %d to %s is declared sef, but " | |
9110 | "the argument may modify %q: %s", | |
9111 | argno, exprNode_unparse (fcn), | |
9112 | sRef_unparse (el), | |
9113 | exprNode_unparse (current)), | |
9114 | exprNode_loc (current)); | |
9115 | } | |
9116 | } | |
9117 | } end_sRefSet_realElements; | |
9118 | } | |
9119 | } | |
9120 | ||
9121 | checkPassTransfer (current, ucurrent, isSpec, fcn, argno, totargs); | |
9122 | exprNode_mergeUSs (fcn, current); | |
9123 | } | |
9124 | } | |
9125 | ||
9126 | static void | |
9127 | checkAnyCall (/*@dependent@*/ exprNode fcn, | |
9128 | /*@dependent@*/ cstring fname, | |
9129 | uentryList pn, | |
9130 | exprNodeList args, | |
9131 | bool hasMods, sRefSet mods, | |
9132 | bool isSpec, | |
9133 | int specialArgs) | |
9134 | { | |
9135 | int paramno = 0; | |
9136 | int nargs = exprNodeList_size (args); | |
9137 | ||
9138 | setCodePoint (); | |
9139 | ||
9140 | /* | |
9141 | ** concat all args ud's to f, add each arg sref as a use unless | |
9142 | ** it was specified as "out", in which case it is a def. | |
9143 | */ | |
9144 | ||
9145 | uentryList_reset (pn); | |
9146 | ||
9147 | /* | |
9148 | ** aliasing checks: | |
9149 | ** | |
9150 | ** if paramn is only or unique, no other arg may alias argn | |
9151 | */ | |
9152 | ||
9153 | exprNodeList_elements (args, current) | |
9154 | { | |
9155 | paramno++; | |
9156 | ||
9157 | if (exprNode_isDefined (current)) | |
9158 | { | |
9159 | if ((!uentryList_isUndefined (pn) && !uentryList_isFinished (pn))) | |
9160 | { | |
9161 | uentry ucurrent = uentryList_current (pn); | |
9162 | ||
9163 | if (specialArgs == 0 | |
9164 | || (paramno < specialArgs)) | |
9165 | { | |
9166 | checkOneArg (ucurrent, current, fcn, isSpec, paramno, nargs); | |
9167 | ||
9168 | if (context_maybeSet (FLG_ALIASUNIQUE)) | |
9169 | { | |
9170 | if (uentry_isOnly (ucurrent) | |
9171 | || uentry_isUnique (ucurrent)) | |
9172 | { | |
9173 | checkUniqueParams (fcn, current, args, | |
9174 | paramno, ucurrent); | |
9175 | } | |
9176 | } | |
9177 | } | |
9178 | } | |
9179 | else /* uentry is undefined */ | |
9180 | { | |
9181 | if (specialArgs == 0) | |
9182 | { | |
9183 | exprNode_checkUseParam (current); | |
9184 | } | |
9185 | ||
9186 | exprNode_mergeUSs (fcn, current); | |
9187 | } | |
9188 | } | |
9189 | uentryList_advanceSafe (pn); | |
9190 | } end_exprNodeList_elements; | |
9191 | ||
9192 | if (hasMods) | |
9193 | { | |
9194 | setCodePoint (); | |
9195 | ||
9196 | sRefSet_allElements (mods, s) | |
9197 | { | |
9198 | sRef fb; | |
9199 | sRef rb = sRef_getRootBase (s); | |
9200 | ||
9201 | if (sRef_isGlobal (rb)) | |
9202 | { | |
9203 | context_usedGlobal (rb); | |
9204 | } | |
9205 | ||
9206 | fb = sRef_fixBaseParam (s, args); | |
9207 | ||
9208 | if (!sRef_isMacroParamRef (fb)) | |
9209 | { | |
9210 | if (sRef_isNothing (fb)) | |
9211 | { | |
9212 | ; | |
9213 | } | |
9214 | else | |
9215 | { | |
9216 | if (sRef_isValid (fb)) | |
9217 | { | |
9218 | uentry ue = sRef_getBaseUentry (s); | |
9219 | ||
9220 | if (uentry_isValid (ue)) | |
9221 | { | |
9222 | uentry_setLset (ue); | |
9223 | } | |
9224 | } | |
9225 | ||
9226 | fcn->sets = sRefSet_insert (fcn->sets, fb); | |
9227 | } | |
9228 | } | |
9229 | sRef_clearDerivedComplete (s); | |
9230 | } end_sRefSet_allElements; | |
9231 | ||
9232 | setCodePoint (); | |
9233 | } | |
9234 | else | |
9235 | { | |
9236 | if (context_hasMods ()) | |
9237 | { | |
9238 | if (context_maybeSet (FLG_MODUNCON)) | |
9239 | { | |
9240 | voptgenerror | |
9241 | (FLG_MODUNCON, | |
9242 | message ("Undetected modification possible " | |
9243 | "from call to unconstrained function %s: %s", | |
9244 | fname, | |
9245 | exprNode_unparse (fcn)), | |
9246 | exprNode_loc (fcn)); | |
9247 | } | |
9248 | } | |
9249 | else | |
9250 | { | |
9251 | if (context_maybeSet (FLG_MODUNCONNOMODS) | |
9252 | && !(context_inIterDef () || context_inIterEnd ())) | |
9253 | { | |
9254 | voptgenerror | |
9255 | (FLG_MODUNCONNOMODS, | |
9256 | message ("Undetected modification possible " | |
9257 | "from call to unconstrained function %s: %s", | |
9258 | fname, | |
9259 | exprNode_unparse (fcn)), | |
9260 | exprNode_loc (fcn)); | |
9261 | } | |
9262 | } | |
9263 | ||
9264 | exprNode_checkSetAny (fcn, fname); | |
9265 | } | |
9266 | } | |
9267 | ||
9268 | void exprNode_checkUseParam (exprNode current) | |
9269 | { | |
9270 | if (exprNode_isDefined (current)) | |
9271 | { | |
9272 | exprNode_checkUse (current, current->sref, current->loc); | |
9273 | } | |
9274 | } | |
9275 | ||
9276 | static ctype | |
9277 | checkNumerics (ctype tr1, ctype tr2, ctype te1, ctype te2, | |
9278 | /*@notnull@*/ exprNode e1, /*@notnull@*/ exprNode e2, | |
9279 | lltok op) | |
9280 | { | |
9281 | ctype ret = tr1; | |
9282 | ||
9283 | if (!ctype_match (tr1, tr2)) | |
9284 | { | |
9285 | if ((ctype_isRealInt (tr1) || ctype_isReal (tr1)) && | |
9286 | (ctype_isRealInt (tr2) || ctype_isReal (tr2))) | |
9287 | { | |
9288 | ; | |
9289 | } | |
9290 | else | |
9291 | { | |
9292 | (void) gentypeerror | |
9293 | (tr1, e1, tr2, e2, | |
9294 | message ("Incompatible types for %s (%s, %s): %s %s %s", | |
9295 | lltok_unparse (op), | |
9296 | ctype_unparse (te1), | |
9297 | ctype_unparse (te2), | |
9298 | exprNode_unparse (e1), lltok_unparse (op), | |
9299 | exprNode_unparse (e2)), | |
9300 | e1->loc); | |
9301 | } | |
9302 | ret = ctype_unknown; | |
9303 | } | |
9304 | else | |
9305 | { | |
9306 | if (ctype_isForceRealNumeric (&tr1) && ctype_isForceRealNumeric (&tr2)) | |
9307 | { | |
9308 | ret = ctype_resolveNumerics (tr1, tr2); | |
9309 | } | |
9310 | else if (!context_msgStrictOps ()) | |
9311 | { | |
9312 | if (ctype_isPointer (tr1)) | |
9313 | { | |
9314 | if (ctype_isPointer (tr2) && !exprNode_isNullValue (e2)) | |
9315 | { | |
9316 | ret = ctype_int; | |
9317 | } | |
9318 | else if (ctype_isInt (tr2)) | |
9319 | { | |
9320 | ret = te1; | |
9321 | } | |
9322 | else | |
9323 | { | |
9324 | ret = ctype_unknown; | |
9325 | } | |
9326 | } | |
9327 | else if (ctype_isPointer (tr2)) | |
9328 | { | |
9329 | if (ctype_isPointer (tr1)) | |
9330 | { | |
9331 | ret = ctype_int; | |
9332 | } | |
9333 | else if (ctype_isInt (tr1)) | |
9334 | { | |
9335 | ret = te2; | |
9336 | } | |
9337 | else | |
9338 | { | |
9339 | ret = ctype_unknown; | |
9340 | } | |
9341 | } | |
9342 | else | |
9343 | { | |
9344 | ret = ctype_resolveNumerics (tr1, tr2); | |
9345 | } | |
9346 | } | |
9347 | else | |
9348 | { | |
9349 | int opid = lltok_getTok (op); | |
9350 | bool comparop = (opid == EQ_OP || opid == NE_OP | |
9351 | || opid == TLT || opid == TGT | |
9352 | || opid == LE_OP || opid == GE_OP); | |
9353 | ||
9354 | if (!ctype_isNumeric (tr1) && !ctype_isNumeric (tr2)) | |
9355 | { | |
9356 | if (comparop | |
9357 | && ((ctype_isEnum (tr1) && ctype_isEnum (tr2)) | |
9358 | || (ctype_isBool (tr1) && ctype_isBool (tr2)) | |
9359 | || (ctype_isChar (tr1) && ctype_isChar (tr2)))) | |
9360 | { | |
9361 | ; /* no error */ | |
9362 | } | |
9363 | else | |
9364 | { | |
9365 | if (ctype_sameName (te1, te2)) | |
9366 | { | |
9367 | voptgenerror | |
9368 | (FLG_STRICTOPS, | |
9369 | message ("Operands of %s are non-numeric (%t): %s %s %s", | |
9370 | lltok_unparse (op), te1, | |
9371 | exprNode_unparse (e1), lltok_unparse (op), | |
9372 | exprNode_unparse (e2)), | |
9373 | e1->loc); | |
9374 | } | |
9375 | else | |
9376 | { | |
9377 | voptgenerror | |
9378 | (FLG_STRICTOPS, | |
9379 | message ("Operands of %s are non-numerics (%t, %t): %s %s %s", | |
9380 | lltok_unparse (op), te1, te2, | |
9381 | exprNode_unparse (e1), lltok_unparse (op), | |
9382 | exprNode_unparse (e2)), | |
9383 | e1->loc); | |
9384 | } | |
9385 | } | |
9386 | } | |
9387 | else if (!ctype_isNumeric (tr1)) | |
9388 | { | |
9389 | voptgenerror | |
9390 | (FLG_STRICTOPS, | |
9391 | message ("Right operand of %s is non-numeric (%t): %s %s %s", | |
9392 | lltok_unparse (op), te1, | |
9393 | exprNode_unparse (e1), lltok_unparse (op), | |
9394 | exprNode_unparse (e2)), | |
9395 | e1->loc); | |
9396 | } | |
9397 | else | |
9398 | { | |
9399 | if (!ctype_isNumeric (tr2)) | |
9400 | { | |
9401 | voptgenerror | |
9402 | (FLG_STRICTOPS, | |
9403 | message ("Left operand of %s is non-numeric (%t): %s %s %s", | |
9404 | lltok_unparse (op), te2, | |
9405 | exprNode_unparse (e1), lltok_unparse (op), | |
9406 | exprNode_unparse (e2)), | |
9407 | e2->loc); | |
9408 | } | |
9409 | } | |
9410 | ||
9411 | ret = ctype_unknown; | |
9412 | } | |
9413 | } | |
9414 | ||
9415 | return ret; | |
9416 | } | |
9417 | ||
9418 | static void | |
9419 | abstractOpError (ctype tr1, ctype tr2, lltok op, | |
9420 | /*@notnull@*/ exprNode e1, /*@notnull@*/ exprNode e2, | |
9421 | fileloc loc1, fileloc loc2) | |
9422 | { | |
9423 | if (ctype_isRealAbstract (tr1) && ctype_isRealAbstract (tr2)) | |
9424 | { | |
9425 | if (ctype_match (tr1, tr2)) | |
9426 | { | |
9427 | voptgenerror | |
9428 | (FLG_ABSTRACT, | |
9429 | message ("Operands of %s are abstract type (%t): %s %s %s", | |
9430 | lltok_unparse (op), tr1, | |
9431 | exprNode_unparse (e1), lltok_unparse (op), exprNode_unparse (e2)), | |
9432 | loc1); | |
9433 | } | |
9434 | else | |
9435 | { | |
9436 | voptgenerror | |
9437 | (FLG_ABSTRACT, | |
9438 | message ("Operands of %s are abstract types (%t, %t): %s %s %s", | |
9439 | lltok_unparse (op), tr1, tr2, | |
9440 | exprNode_unparse (e1), lltok_unparse (op), exprNode_unparse (e2)), | |
9441 | loc1); | |
9442 | } | |
9443 | } | |
9444 | else if (ctype_isRealAbstract (tr1)) | |
9445 | { | |
9446 | voptgenerror | |
9447 | (FLG_ABSTRACT, | |
9448 | message ("Left operand of %s is abstract type (%t): %s %s %s", | |
9449 | lltok_unparse (op), tr1, | |
9450 | exprNode_unparse (e1), lltok_unparse (op), exprNode_unparse (e2)), | |
9451 | loc1); | |
9452 | } | |
9453 | else | |
9454 | { | |
9455 | if (ctype_isRealAbstract (tr2)) | |
9456 | { | |
9457 | voptgenerror | |
9458 | (FLG_ABSTRACT, | |
9459 | message ("Right operand of %s is abstract type (%t): %s %s %s", | |
9460 | lltok_unparse (op), tr2, | |
9461 | exprNode_unparse (e1), lltok_unparse (op), exprNode_unparse (e2)), | |
9462 | loc2); | |
9463 | } | |
9464 | } | |
9465 | } | |
9466 | ||
9467 | /* | |
9468 | ** e1 <= e2 | |
9469 | ** | |
9470 | ** requies e1 and e2 and not error exprNode's. | |
9471 | ** | |
9472 | ** Checks: | |
9473 | ** | |
9474 | ** If e1 is a component of an abstract type, and e2 is mutable and client-visible, | |
9475 | ** the rep of the abstract type is exposed. | |
9476 | ** | |
9477 | ** The order is very important: | |
9478 | ** | |
9479 | ** check rep expose (move into check transfer) | |
9480 | ** check transfer | |
9481 | ** setup aliases | |
9482 | */ | |
9483 | ||
9484 | /* | |
9485 | ** This isn't really a sensible procedure, but the indententation | |
9486 | ** was getting too deep. | |
9487 | */ | |
9488 | ||
9489 | static void | |
9490 | checkOneRepExpose (sRef ysr, sRef base, | |
9491 | /*@notnull@*/ exprNode e1, | |
9492 | /*@notnull@*/ exprNode e2, ctype ct, | |
9493 | sRef s2b) | |
9494 | { | |
9495 | if (!(sRef_isOnly (ysr) || sRef_isKeep (ysr) | |
9496 | || sRef_isOwned (ysr) || sRef_isExposed (ysr))) | |
9497 | { | |
9498 | if (sRef_isAnyParam (base) && !sRef_isExposed (base)) | |
9499 | { | |
9500 | if (sRef_isIReference (ysr)) | |
9501 | { | |
9502 | if (sRef_sameName (base, sRef_getRootBase (e2->sref))) | |
9503 | { | |
9504 | voptgenerror | |
9505 | (FLG_ASSIGNEXPOSE, | |
9506 | message | |
9507 | ("Assignment of mutable component of parameter %q " | |
9508 | "to component of abstract " | |
9509 | "type %s exposes rep: %s = %s", | |
9510 | sRef_unparse (base), | |
9511 | ctype_unparse (ct), | |
9512 | exprNode_unparse (e1), exprNode_unparse (e2)), | |
9513 | e1->loc); | |
9514 | } | |
9515 | else | |
9516 | { | |
9517 | voptgenerror | |
9518 | (FLG_ASSIGNEXPOSE, | |
9519 | message | |
9520 | ("Assignment of mutable component of parameter %q " | |
9521 | "(through alias %q) to component of abstract " | |
9522 | "type %s exposes rep: %s = %s", | |
9523 | sRef_unparse (base), | |
9524 | sRef_unparse (e2->sref), | |
9525 | ctype_unparse (ct), | |
9526 | exprNode_unparse (e1), exprNode_unparse (e2)), | |
9527 | e1->loc); | |
9528 | } | |
9529 | } | |
9530 | else | |
9531 | { | |
9532 | if (sRef_sameName (base, sRef_getRootBase (e2->sref))) | |
9533 | { | |
9534 | voptgenerror | |
9535 | (FLG_ASSIGNEXPOSE, | |
9536 | message ("Assignment of mutable parameter %q " | |
9537 | "to component of abstract type %s " | |
9538 | "exposes rep: %s = %s", | |
9539 | sRef_unparse (base), | |
9540 | ctype_unparse (ct), | |
9541 | exprNode_unparse (e1), | |
9542 | exprNode_unparse (e2)), | |
9543 | e1->loc); | |
9544 | } | |
9545 | else | |
9546 | { | |
9547 | voptgenerror | |
9548 | (FLG_ASSIGNEXPOSE, | |
9549 | message ("Assignment of mutable parameter %q " | |
9550 | "(through alias %q) to " | |
9551 | "component of abstract type %s exposes " | |
9552 | "rep: %s = %s", | |
9553 | sRef_unparse (base), | |
9554 | sRef_unparse (e2->sref), | |
9555 | ctype_unparse (ct), | |
9556 | exprNode_unparse (e1), | |
9557 | exprNode_unparse (e2)), | |
9558 | e1->loc); | |
9559 | } | |
9560 | } | |
9561 | } | |
9562 | ||
9563 | if (sRef_isGlobal (s2b)) | |
9564 | { | |
9565 | if (sRef_sameName (base, sRef_getRootBase (e2->sref))) | |
9566 | { | |
9567 | voptgenerror | |
9568 | (FLG_REPEXPOSE, | |
9569 | message ("Assignment of global %q " | |
9570 | "to component of " | |
9571 | "abstract type %s exposes rep: %s = %s", | |
9572 | sRef_unparse (base), | |
9573 | ctype_unparse (ct), | |
9574 | exprNode_unparse (e1), exprNode_unparse (e2)), | |
9575 | e1->loc); | |
9576 | } | |
9577 | else | |
9578 | { | |
9579 | voptgenerror | |
9580 | (FLG_REPEXPOSE, | |
9581 | message ("Assignment of global %q (through alias %q) " | |
9582 | "to component of " | |
9583 | "abstract type %s exposes rep: %s = %s", | |
9584 | sRef_unparse (base), | |
9585 | sRef_unparse (e2->sref), | |
9586 | ctype_unparse (ct), | |
9587 | exprNode_unparse (e1), exprNode_unparse (e2)), | |
9588 | e1->loc); | |
9589 | } | |
9590 | } | |
9591 | } | |
9592 | } | |
9593 | ||
9594 | static void | |
9595 | doAssign (/*@notnull@*/ exprNode e1, /*@notnull@*/ exprNode e2, bool isInit) | |
9596 | { | |
9597 | if (ctype_isRealFunction (exprNode_getType (e1)) | |
9598 | && !ctype_isRealPointer (exprNode_getType (e1))) | |
9599 | { | |
9600 | voptgenerror | |
9601 | (FLG_TYPE, | |
9602 | message ("Invalid left-hand side of assignment (function type %s): %s", | |
9603 | ctype_unparse (exprNode_getType (e1)), | |
9604 | exprNode_unparse (e1)), | |
9605 | e1->loc); | |
9606 | } | |
9607 | ||
9608 | if (context_getFlag (FLG_ASSIGNEXPOSE) && ctype_isMutable (e2->typ)) | |
9609 | { | |
9610 | ctype t2 = exprNode_getType (e2); | |
9611 | sRef sr = sRef_getRootBase (e1->sref); | |
9612 | ctype ct = sRef_getType (sr); | |
9613 | ||
9614 | if (ctype_isAbstract (t2) | |
9615 | && !(uentry_isMutableDatatype (usymtab_getTypeEntry (ctype_typeId (t2))))) | |
9616 | { | |
9617 | /* it is immutable, okay to reference */ | |
9618 | goto donerepexpose; | |
9619 | } | |
9620 | ||
9621 | if (ctype_isAbstract (ct) && sRef_isIReference (e1->sref)) | |
9622 | { | |
9623 | sRef s2b = sRef_getRootBase (e2->sref); | |
9624 | sRef s1 = e1->sref; | |
9625 | sRef s1b = sRef_getRootBase (s1); | |
9626 | sRefSet aliases; | |
9627 | ||
9628 | aliases = usymtab_canAlias (e2->sref); | |
9629 | ||
9630 | if (!sRef_similar (s2b, s1b) | |
9631 | && !sRef_isExposed (s1) | |
9632 | && !(sRef_isOnly (s2b) || sRef_isKeep (s2b) || sRef_isExposed (s2b))) | |
9633 | { | |
9634 | if (sRef_isAnyParam (s2b) && !sRef_isOnly (s2b) | |
9635 | && !sRef_isOwned (s2b) && !sRef_isKeep (s2b) | |
9636 | && !sRef_isExposed (s2b)) | |
9637 | { | |
9638 | if (sRef_isIReference (e2->sref)) | |
9639 | { | |
9640 | voptgenerror | |
9641 | (FLG_ASSIGNEXPOSE, | |
9642 | message | |
9643 | ("Assignment of mutable component of parameter %q " | |
9644 | "to component of abstract type %s exposes rep: %s = %s", | |
9645 | sRef_unparse (s2b), | |
9646 | ctype_unparse (ct), | |
9647 | exprNode_unparse (e1), exprNode_unparse (e2)), | |
9648 | e1->loc); | |
9649 | } | |
9650 | else | |
9651 | { | |
9652 | voptgenerror | |
9653 | (FLG_ASSIGNEXPOSE, | |
9654 | message ("Assignment of mutable parameter %q to " | |
9655 | "component of abstract type %s exposes rep: %s = %s", | |
9656 | sRef_unparse (s2b), | |
9657 | ctype_unparse (ct), | |
9658 | exprNode_unparse (e1), exprNode_unparse (e2)), | |
9659 | e1->loc); | |
9660 | } | |
9661 | } | |
9662 | ||
9663 | if (sRef_isGlobal (s2b)) | |
9664 | { | |
9665 | voptgenerror | |
9666 | (FLG_ASSIGNEXPOSE, | |
9667 | message ("Assignment of global %q to component of " | |
9668 | "abstract type %s exposes rep: %s = %s", | |
9669 | sRef_unparse (s2b), | |
9670 | ctype_unparse (ct), | |
9671 | exprNode_unparse (e1), exprNode_unparse (e2)), | |
9672 | e1->loc); | |
9673 | } | |
9674 | ||
9675 | sRefSet_realElements (aliases, ysr) | |
9676 | { | |
9677 | sRef base = sRef_getRootBase (ysr); | |
9678 | ||
9679 | if (sRef_similar (ysr, s2b) || sRef_similar (s1b, base) | |
9680 | || sRef_sameName (base, s1b)) | |
9681 | { | |
9682 | ; /* error already reported or same sref */ | |
9683 | } | |
9684 | else | |
9685 | { | |
9686 | checkOneRepExpose (ysr, base, e1, e2, ct, s2b); | |
9687 | } | |
9688 | } end_sRefSet_realElements; | |
9689 | } | |
9690 | sRefSet_free (aliases); | |
9691 | } | |
9692 | } | |
9693 | ||
9694 | donerepexpose: | |
9695 | ||
9696 | /* | |
9697 | ** function variables don't really work... | |
9698 | */ | |
9699 | ||
9700 | if (!ctype_isFunction (ctype_realType (e2->typ))) | |
9701 | { | |
9702 | if (isInit) | |
9703 | { | |
9704 | checkInitTransfer (e1, e2); | |
9705 | } | |
9706 | else | |
9707 | { | |
9708 | checkAssignTransfer (e1, e2); | |
9709 | } | |
9710 | } | |
9711 | else | |
9712 | { | |
9713 | sRef fref = e2->sref; | |
9714 | ||
9715 | sRef_setDefState (e1->sref, sRef_getDefState (fref), e1->loc); | |
9716 | sRef_setNullState (e1->sref, sRef_getNullState (fref), e1->loc); | |
9717 | ||
9718 | /* Need to typecheck the annotation on the parameters */ | |
9719 | ||
9720 | if (ctype_isRealFunction (e1->typ)) { | |
9721 | uentryList e1p = ctype_argsFunction (ctype_realType (e1->typ)); | |
9722 | uentryList e2p = ctype_argsFunction (ctype_realType (e2->typ)); | |
9723 | ||
9724 | if (!uentryList_isMissingParams (e1p) | |
9725 | && !uentryList_isMissingParams (e2p) | |
9726 | && uentryList_size (e1p) > 0) { | |
9727 | if (uentryList_size (e1p) == uentryList_size (e2p)) { | |
9728 | int n = 0; | |
9729 | ||
9730 | uentryList_elements (e1p, el1) { | |
9731 | uentry el2; | |
9732 | ||
9733 | el2 = uentryList_getN (e2p, n); | |
9734 | n++; | |
9735 | uentry_checkMatchParam (el1, el2, n, e2); | |
9736 | } end_uentryList_elements; | |
9737 | } | |
9738 | } | |
9739 | } | |
9740 | } | |
9741 | ||
9742 | if (isInit && sRef_isGlobal (e1->sref)) | |
9743 | { | |
9744 | ; | |
9745 | } | |
9746 | else | |
9747 | { | |
9748 | updateAliases (e1, e2); | |
9749 | } | |
dc92450f | 9750 | // updateEnvironment (e1, e2); |
616915dd | 9751 | } |
9752 | ||
9753 | static void | |
9754 | checkMacroParen (exprNode e) | |
9755 | { | |
9756 | if (exprNode_isError (e) || e->kind == XPR_CAST) | |
9757 | { | |
9758 | ; | |
9759 | } | |
9760 | else | |
9761 | { | |
9762 | if (sRef_isUnsafe (e->sref) && !exprNode_isInParens (e)) | |
9763 | { | |
9764 | voptgenerror | |
9765 | (FLG_MACROPARENS, | |
9766 | message ("Macro parameter used without parentheses: %s", | |
9767 | exprNode_unparse (e)), | |
9768 | e->loc); | |
9769 | } | |
9770 | } | |
9771 | } | |
9772 | ||
9773 | static void | |
9774 | reflectNullTest (/*@notnull@*/ exprNode e, bool isnull) | |
9775 | { | |
9776 | if (isnull) | |
9777 | { | |
9778 | e->guards = guardSet_addTrueGuard (e->guards, e->sref); | |
9779 | } | |
9780 | else | |
9781 | { | |
9782 | e->guards = guardSet_addFalseGuard (e->guards, e->sref); | |
9783 | } | |
9784 | } | |
9785 | ||
9786 | /* | |
9787 | ** e1 <= e2 | |
9788 | ** | |
9789 | ** if e2 is a parameter or global derived location which | |
9790 | ** can be modified (that is, e2 is a mutable abstract type, | |
9791 | ** or a derived pointer), then e1 can alias e2. | |
9792 | ** | |
9793 | ** e1 can alias everything which e2 can alias. | |
9794 | ** | |
9795 | ** Also, if e1 is guarded, remove from guard sets! | |
9796 | */ | |
9797 | ||
9798 | static void updateAliases (/*@notnull@*/ exprNode e1, /*@notnull@*/ exprNode e2) | |
9799 | { | |
9800 | if (!context_inProtectVars ()) | |
9801 | { | |
9802 | /* | |
9803 | ** depends on types of e1 and e2 | |
9804 | */ | |
9805 | ||
9806 | sRef s1 = e1->sref; | |
9807 | sRef s2 = e2->sref; | |
9808 | ctype t1 = exprNode_getType (e1); | |
9809 | ||
9810 | /* handle pointer sRefs, record fields, arrays, etc... */ | |
9811 | ||
9812 | if (!ctype_isRealSU (t1)) | |
9813 | { | |
9814 | sRef_copyRealDerivedComplete (s1, s2); | |
9815 | } | |
9816 | ||
9817 | if (ctype_isMutable (t1) && sRef_isKnown (s1)) | |
9818 | { | |
9819 | usymtab_clearAlias (s1); | |
9820 | usymtab_addMustAlias (s1, s2); | |
9821 | } | |
9822 | ||
9823 | if (sRef_possiblyNull (s1) && usymtab_isGuarded (s1)) | |
9824 | { | |
9825 | usymtab_unguard (s1); | |
9826 | } | |
9827 | } | |
9828 | } | |
9829 | ||
9830 | exprNode exprNode_updateLocation (/*@returned@*/ exprNode e, /*@temp@*/ fileloc loc) | |
9831 | { | |
9832 | if (exprNode_isDefined (e)) | |
9833 | { | |
9834 | e->loc = fileloc_update (e->loc, loc); | |
9835 | } | |
9836 | else | |
9837 | { | |
9838 | e = exprNode_createLoc (ctype_unknown, fileloc_copy (loc)); | |
9839 | } | |
9840 | ||
9841 | return (e); | |
9842 | } | |
9843 | ||
9844 | static void checkUniqueParams (exprNode fcn, | |
9845 | /*@notnull@*/ exprNode current, | |
9846 | exprNodeList args, | |
9847 | int paramno, uentry ucurrent) | |
9848 | { | |
9849 | int iparamno = 0; | |
9850 | sRef thisref = exprNode_getSref (current); | |
9851 | ||
9852 | /* | |
9853 | ** Check if any argument could match this argument. | |
9854 | */ | |
9855 | ||
9856 | exprNodeList_elements (args, icurrent) | |
9857 | { | |
9858 | iparamno++; | |
9859 | ||
9860 | if (iparamno != paramno) | |
9861 | { | |
9862 | sRef sr = exprNode_getSref (icurrent); | |
9863 | ||
9864 | if (sRef_similarRelaxed (thisref, sr)) | |
9865 | { | |
9866 | if (!sRef_isConst (thisref) && !sRef_isConst (sr)) | |
9867 | { | |
9868 | voptgenerror | |
9869 | (FLG_ALIASUNIQUE, | |
9870 | message | |
9871 | ("Parameter %d (%s) to function %s is declared %s but " | |
9872 | "is aliased by parameter %d (%s)", | |
9873 | paramno, | |
9874 | exprNode_unparse (current), | |
9875 | exprNode_unparse (fcn), | |
9876 | alkind_unparse (uentry_getAliasKind (ucurrent)), | |
9877 | iparamno, exprNode_unparse (icurrent)), | |
9878 | current->loc); | |
9879 | } | |
9880 | } | |
9881 | else | |
9882 | { | |
9883 | sRefSet aliases = usymtab_canAlias (sr); | |
9884 | ||
9885 | sRefSet_allElements (aliases, asr) | |
9886 | { | |
9887 | if (ctype_isUnknown (sRef_getType (thisref))) | |
9888 | { | |
9889 | sRef_setType (thisref, uentry_getType (ucurrent)); | |
9890 | } | |
9891 | ||
9892 | if (sRef_similarRelaxed (thisref, asr)) | |
9893 | { | |
9894 | if (sRef_isExternal (asr)) | |
9895 | { | |
9896 | if (sRef_isLocalState (thisref)) | |
9897 | { | |
9898 | ; /* okay */ | |
9899 | } | |
9900 | else | |
9901 | { | |
9902 | sRef base = sRef_getRootBase (asr); | |
9903 | ||
9904 | if (!sRef_similar (sRef_getBase (asr), thisref)) | |
9905 | { | |
9906 | if (sRef_isUnique (base) || sRef_isOnly (base) | |
9907 | || sRef_isKept (base) | |
9908 | || (sRef_isAddress (asr) && sRef_isLocalVar (base)) | |
9909 | || (sRef_isAddress (thisref) | |
9910 | && sRef_isLocalVar (sRef_getRootBase (thisref)))) | |
9911 | { | |
9912 | ; /* okay, no error */ | |
9913 | } | |
9914 | else | |
9915 | { | |
9916 | voptgenerror | |
9917 | (FLG_MAYALIASUNIQUE, | |
9918 | message | |
9919 | ("Parameter %d (%s) to function %s is declared %s but " | |
9920 | "may be aliased externally by parameter %d (%s)", | |
9921 | paramno, | |
9922 | exprNode_unparse (current), | |
9923 | exprNode_unparse (fcn), | |
9924 | alkind_unparse (uentry_getAliasKind (ucurrent)), | |
9925 | iparamno, exprNode_unparse (icurrent)), | |
9926 | current->loc); | |
9927 | } | |
9928 | } | |
9929 | } | |
9930 | } | |
9931 | else | |
9932 | { | |
9933 | voptgenerror | |
9934 | (FLG_ALIASUNIQUE, | |
9935 | message | |
9936 | ("Parameter %d (%s) to function %s is declared %s but " | |
9937 | "is aliased externally by parameter %d (%s) through " | |
9938 | "alias %q", | |
9939 | paramno, | |
9940 | exprNode_unparse (current), | |
9941 | exprNode_unparse (fcn), | |
9942 | alkind_unparse (uentry_getAliasKind (ucurrent)), | |
9943 | iparamno, exprNode_unparse (icurrent), | |
9944 | sRef_unparse (asr)), | |
9945 | current->loc); | |
9946 | } | |
9947 | } | |
9948 | } end_sRefSet_allElements; | |
9949 | sRefSet_free (aliases); | |
9950 | } | |
9951 | } | |
9952 | } end_exprNodeList_elements; | |
9953 | } | |
9954 | ||
9955 | long exprNode_getLongValue (exprNode e) { | |
9956 | long value; | |
9957 | ||
9958 | if (exprNode_hasValue (e) | |
9959 | && multiVal_isInt (exprNode_getValue (e))) | |
9960 | { | |
9961 | value = multiVal_forceInt (exprNode_getValue (e)); | |
9962 | } | |
9963 | else | |
9964 | { | |
9965 | value = 0; | |
9966 | } | |
9967 | ||
9968 | return value; | |
9969 | } | |
9970 | ||
9971 | fileloc exprNode_getfileloc (exprNode p_e) | |
9972 | { | |
84c9ffbf | 9973 | if (exprNode_isDefined (p_e) ) |
616915dd | 9974 | return fileloc_copy ( p_e->loc ); |
9975 | else | |
9976 | return fileloc_undefined; | |
9977 | } | |
9978 | ||
9979 | fileloc exprNode_getNextSequencePoint (exprNode e) | |
9980 | { | |
9981 | /* | |
9982 | ** Returns the location of the sequence point following e. | |
9983 | ** | |
9984 | ** Only works for statements (for now). | |
9985 | */ | |
9986 | ||
9987 | if (exprNode_isDefined (e) && e->kind == XPR_STMT) { | |
9988 | lltok t = exprData_getUopTok (e->edata); | |
9989 | return lltok_getLoc (t); | |
9990 | } else { | |
9991 | #warning fix | |
9992 | // llcontbug (message ("Cannot get next sequence point: %s", exprNode_unparse (e))); | |
9993 | return fileloc_undefined; | |
9994 | } | |
9995 | } | |
9996 | ||
9997 | ||
9280addf | 9998 | /*drl added |
9999 | */ | |
10000 | exprNode exprNode_fakeCopy (exprNode e) | |
10001 | { | |
10002 | /*@-temptrans@*/ /*@-retalias@*/ | |
10003 | return e; | |
10004 | /*@=temptrans@*/ /*@=retalias@*/ | |
10005 | } | |
10006 | ||
10007 | exprNode exprNode_createNew(ctype c) | |
10008 | { | |
10009 | exprNode ret; | |
10010 | ||
10011 | ret = exprNode_createPlain (c); | |
10012 | ||
10013 | return ret; | |
10014 | } |