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Fixed manual csvoverwrite.
[splint.git] / src / exprNode.c
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616915dd 1/*
11db3170 2** Splint - annotation-assisted static program checker
c59f5181 3** Copyright (C) 1994-2003 University of Virginia,
616915dd 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**
155af98d 20** For information on splint: info@splint.org
21** To report a bug: splint-bug@splint.org
11db3170 22** For more information: http://www.splint.org
616915dd 23*/
24/*
25** exprNode.c
26*/
27
28# include <ctype.h> /* for isdigit */
1b8ae690 29# include "splintMacros.nf"
616915dd 30# include "basic.h"
31# include "cgrammar.h"
6fcd0b1e 32# include "cscanner.h"
16c024b5 33# include "cscannerHelp.h"
616915dd 34# include "cgrammar_tokens.h"
35
36# include "exprChecks.h"
28bf4b0b 37# include "transferChecks.h"
616915dd 38# include "exprNodeSList.h"
616915dd 39
3e3ec469 40static bool exprNode_sameStorage (exprNode p_e1, exprNode p_e2) /*@*/ ;
616915dd 41static bool exprNode_isEmptyStatement (exprNode p_e);
42static /*@exposed@*/ exprNode exprNode_firstStatement (/*@returned@*/ exprNode p_e);
43static bool exprNode_isFalseConstant (exprNode p_e) /*@*/ ;
abd7f895 44static bool exprNode_isStatement (exprNode p_e);
616915dd 45static void checkGlobUse (uentry p_glob, bool p_isCall, /*@notnull@*/ exprNode p_e);
28bf4b0b 46static void exprNode_addUse (exprNode p_e, /*@exposed@*/ sRef p_s);
616915dd 47static bool exprNode_matchArgType (ctype p_ct, exprNode p_e);
28bf4b0b 48static exprNode exprNode_fakeCopy (exprNode p_e) /*@*/ ;
616915dd 49static exprNode exprNode_statementError (/*@only@*/ exprNode p_e, /*@only@*/ lltok p_t);
50static bool exprNode_matchTypes (exprNode p_e1, exprNode p_e2);
51static void checkUniqueParams (exprNode p_fcn,
52 /*@notnull@*/ exprNode p_current, exprNodeList p_args,
53 int p_paramno, uentry p_ucurrent);
54static void updateAliases (/*@notnull@*/ exprNode p_e1, /*@notnull@*/ exprNode p_e2);
e5081f8c 55static bool abstractOpError (ctype p_tr1, ctype p_tr2, lltok p_op,
616915dd 56 /*@notnull@*/ exprNode p_e1, /*@notnull@*/ exprNode p_e2,
e5081f8c 57 fileloc p_loc1, fileloc p_loc2)
58 /*@modifies g_warningstream@*/ ;
616915dd 59static ctype checkNumerics (ctype p_tr1, ctype p_tr2, ctype p_te1, ctype p_te2,
60 /*@notnull@*/ exprNode p_e1, /*@notnull@*/ exprNode p_e2, lltok p_op);
61static void doAssign (/*@notnull@*/ exprNode p_e1, /*@notnull@*/ exprNode p_e2, bool p_isInit);
28bf4b0b 62static void checkSafeUse (exprNode p_e, /*@exposed@*/ sRef p_s);
616915dd 63static void reflectNullTest (/*@notnull@*/ exprNode p_e, bool p_isnull);
64static void checkMacroParen (exprNode p_e);
65static exprNodeSList exprNode_flatten (/*@dependent@*/ exprNode p_e);
66static void exprNode_checkSetAny (exprNode p_e, /*@dependent@*/ cstring p_name);
28bf4b0b 67static void exprNode_checkUse (exprNode p_e, /*@exposed@*/ sRef p_s, fileloc p_loc);
616915dd 68static void exprNode_mergeUSs (exprNode p_res, exprNode p_other);
69static void exprNode_mergeCondUSs (exprNode p_res, exprNode p_other1, exprNode p_other2);
70static /*@only@*/ /*@notnull@*/ exprNode exprNode_fromIdentifierAux (/*@observer@*/ uentry p_c);
71static void checkAnyCall (/*@notnull@*/ /*@dependent@*/ exprNode p_fcn,
72 /*@dependent@*/ cstring p_fname,
73 uentryList p_pn, exprNodeList p_args,
74 bool p_hasMods, sRefSet p_mods, bool p_isSpec,
75 int p_specialArgs);
76static void checkOneArg (uentry p_ucurrent, /*@notnull@*/ exprNode p_current,
77 /*@dependent@*/ exprNode p_fcn, bool p_isSpec, int p_argno, int p_totargs);
78static void
79 checkUnspecCall (/*@notnull@*/ /*@dependent@*/ exprNode p_fcn, uentryList p_params, exprNodeList p_args);
80
81static /*@only@*/ exprNode exprNode_effect (exprNode p_e)
82 /*@globals internalState@*/ ;
83static /*@only@*/ cstring exprNode_doUnparse (exprNode p_e);
84static /*@observer@*/ cstring exprNode_rootVarName (exprNode p_e);
85static /*@exposed@*/ exprNode
86 exprNode_lastStatement (/*@returned@*/ exprNode p_e);
87
02b84d4b 88static /*@only@*/ exprNode s_mustExitNode = exprNode_undefined;
616915dd 89
90static int checkArgsReal (uentry p_fcn, /*@dependent@*/ exprNode p_f,
91 uentryList p_cl,
92 exprNodeList p_args, bool p_isIter, exprNode p_ret);
93
94static bool inEffect = FALSE;
95static int nowalloc = 0;
96static int totalloc = 0;
97static int maxalloc = 0;
98
99static /*@only@*/ uentry regArg;
100static /*@only@*/ uentry outArg;
101static /*@only@*/ uentry outStringArg;
102static /*@exposed@*/ sRef stdinRef;
103static /*@exposed@*/ sRef stdoutRef;
104static /*@only@*/ uentry csArg;
105static /*@only@*/ uentry csOnlyArg;
106static ctype cstringType;
107static ctype ctypeType;
108static ctype filelocType;
109static bool initMod = FALSE;
110
ccf0a4a8 111/*@function void exprNode_swap (sef exprNode, sef exprNode)@*/
112/*@-macroassign@*/
113# define exprNode_swap(e1,e2) do { exprNode m_tmp = (e1); (e1) = (e2); (e2) = m_tmp; } while (FALSE)
114/*@=macroassign@*/
115
08eb3d0e 116static void exprNode_defineConstraints(/*@sef@*/ /*@special@*/ /*@notnull@*/ exprNode e)
117 /*@defines e->requiresConstraints, e->ensuresConstraints,
118 e->trueEnsuresConstraints, e->falseEnsuresConstraints @*/
119{
120 e->requiresConstraints = constraintList_makeNew ();
121 e->ensuresConstraints = constraintList_makeNew ();
122 e->trueEnsuresConstraints = constraintList_makeNew ();
123 e->falseEnsuresConstraints = constraintList_makeNew ();
124}
84c9ffbf 125
616915dd 126/*
127** must occur after library has been read
128*/
129
130void exprNode_initMod (void)
131 /*@globals undef regArg, undef outArg, undef outStringArg,
132 undef csOnlyArg, undef csArg;
133 @*/
134{
135 uentry ue;
136 idDecl tmp;
137
138 initMod = TRUE;
139 cstringType = ctype_unknown;
140 ctypeType = ctype_unknown;
141 filelocType = ctype_unknown;
142
616915dd 143 if (usymtab_existsType (cstring_makeLiteralTemp ("cstring")))
144 {
145 cstringType = usymtab_lookupAbstractType (cstring_makeLiteralTemp ("cstring"));
146 }
147
148 if (usymtab_existsType (cstring_makeLiteralTemp ("ctype")))
149 {
150 ctypeType = usymtab_lookupAbstractType (cstring_makeLiteralTemp ("ctype"));
151 }
152
153 if (usymtab_existsType (cstring_makeLiteralTemp ("fileloc")))
154 {
155 filelocType = usymtab_lookupAbstractType (cstring_makeLiteralTemp ("fileloc"));
156 }
157
158 if (usymtab_existsGlob (cstring_makeLiteralTemp ("stdin")))
159 {
160 ue = usymtab_lookupGlob (cstring_makeLiteralTemp ("stdin"));
161 }
162 else /* define stdin */
163 {
164 ue = uentry_makeVariable (cstring_makeLiteralTemp ("stdin"),
165 ctype_unknown,
166 fileloc_getBuiltin (),
167 FALSE);
168 uentry_setHasNameError (ue);
169 ue = usymtab_supGlobalEntryReturn (ue);
170 }
171
172 stdinRef = sRef_makePointer (uentry_getSref (ue));
173
174 if (usymtab_existsGlob (cstring_makeLiteralTemp ("stdout")))
175 {
176 ue = usymtab_lookupGlob (cstring_makeLiteralTemp ("stdout"));
177 }
178 else
179 {
180 ue = uentry_makeVariable (cstring_makeLiteralTemp ("stdout"),
181 ctype_unknown,
182 fileloc_getBuiltin (),
183 FALSE);
184 uentry_setHasNameError (ue);
185 ue = usymtab_supGlobalEntryReturn (ue);
186 }
187
188 stdoutRef = sRef_makePointer (uentry_getSref (ue));
189
190 tmp = idDecl_create (cstring_undefined, qtype_create (ctype_unknown));
191
192 regArg = uentry_makeParam (tmp, PARAMUNKNOWN);
193
194 idDecl_setTyp (tmp,
195 qtype_addQual (qtype_create (ctype_makePointer (ctype_unknown)),
196 qual_createOut ()));
197
198 outArg = uentry_makeParam (tmp, PARAMUNKNOWN);
199
200 idDecl_setTyp (tmp, qtype_addQual (qtype_create (ctype_string),
201 qual_createOut ()));
202
203 outStringArg = uentry_makeParam (tmp, PARAMUNKNOWN);
204
205 idDecl_setTyp (tmp, qtype_addQual (qtype_addQual (qtype_create (cstringType),
206 qual_createOnly ()),
207 qual_createNull ()));
208
209 csOnlyArg = uentry_makeParam (tmp, PARAMUNKNOWN);
210
211 idDecl_setTyp (tmp, qtype_addQual (qtype_create (cstringType), qual_createNull ()));
212 csArg = uentry_makeParam (tmp, PARAMUNKNOWN);
213
214 idDecl_free (tmp);
215}
216
217void
218exprNode_destroyMod (void)
219 /*@globals killed regArg, killed outArg, killed outStringArg,
02b84d4b 220 killed s_mustExitNode, initMod @*/
616915dd 221{
222 if (initMod)
223 {
6fcd0b1e 224 /* evans 2002-07-12: changed uentry_free to uentry_freeComplete */
225 uentry_freeComplete (regArg);
226 uentry_freeComplete (outArg);
227 uentry_freeComplete (outStringArg);
616915dd 228
02b84d4b 229 exprNode_free (s_mustExitNode);
616915dd 230 initMod = FALSE;
6fcd0b1e 231 /*@-branchstate@*/
616915dd 232 }
233 /*@=branchstate@*/
234}
235
236static void exprNode_resetSref (/*@notnull@*/ exprNode e)
237{
02b84d4b 238 e->sref = sRef_undefined;
616915dd 239}
240
28bf4b0b 241exprNode exprNode_fakeCopy (exprNode e)
242{
243 /*@-temptrans@*/ /*@-retalias@*/
244 return e;
245 /*@=temptrans@*/ /*@=retalias@*/
246}
247
616915dd 248static bool isFlagKey (char key)
249{
250 return (key == '-' || key == '+' || key == ' ' || key == '#');
251}
252
253static void exprNode_combineControl (/*@notnull@*/ exprNode ret,
254 /*@notnull@*/ exprNode ifclause,
255 /*@notnull@*/ exprNode elseclause)
256{
257 ret->canBreak = ifclause->canBreak || elseclause->canBreak;
258
259 ret->mustBreak =
260 (ifclause->mustBreak || exprNode_mustEscape (ifclause))
261 && (elseclause->mustBreak || exprNode_mustEscape (elseclause));
262
263 ret->exitCode = exitkind_combine (ifclause->exitCode,
264 elseclause->exitCode);
265
266}
267
268/*
269** For exprNode's returned by exprNode_effect.
270*/
271
272static bool shallowKind (exprKind kind)
273{
274 return (kind == XPR_STRINGLITERAL
275 || kind == XPR_NUMLIT
276 || kind == XPR_EMPTY
277 || kind == XPR_BODY
278 || kind == XPR_NODE);
279}
280
281static void
282exprNode_freeIniter (/*@only@*/ exprNode e)
283{
284 if (!exprNode_isError (e))
285 {
286 switch (e->kind)
287 {
288 case XPR_FACCESS:
28bf4b0b 289 /*
290 ** Its a fake copy, don't free the field->rec and field->field
291 ** fields.
292 */
293
294 /*@-compdestroy@*/
616915dd 295 sfree (e->edata->field);
28bf4b0b 296 /*@=compdestroy@*/
297
616915dd 298 sfree (e->edata);
299 break;
300 case XPR_FETCH:
301 exprNode_free (e->edata->op->b);
302 /*@-compdestroy@*/ sfree (e->edata->op); /*@=compdestroy@*/
303 sfree (e->edata);
304 break;
305 default:
306 llbug (message ("other: %s", exprNode_unparse (e)));
307 }
308
309 multiVal_free (e->val);
310 cstring_free (e->etext);
311 fileloc_free (e->loc);
312 sRefSet_free (e->uses);
313 sRefSet_free (e->sets);
314 sRefSet_free (e->msets);
315 guardSet_free (e->guards);
bb25bea6 316
317 constraintList_free(e->requiresConstraints);
318 constraintList_free(e->ensuresConstraints);
319 constraintList_free(e->trueEnsuresConstraints);
320 constraintList_free(e->falseEnsuresConstraints);
321
322 e->requiresConstraints = NULL;
323 e->ensuresConstraints = NULL;
324 e->trueEnsuresConstraints = NULL;
325 e->falseEnsuresConstraints = NULL;
326
616915dd 327 sfree (e);
328 }
329}
330
331void
332exprNode_freeShallow (/*@only@*/ exprNode e)
333{
334 if (!exprNode_isError (e))
335 {
336 if (shallowKind (e->kind))
337 {
338 }
339 else
340 {
341 if (!inEffect)
342 {
343 if (e->kind == XPR_EMPTY
344 || e->kind == XPR_BODY
345 || e->kind == XPR_STRINGLITERAL
346 || e->kind == XPR_NUMLIT
347 || e->kind == XPR_NODE
348 || e->kind == XPR_OFFSETOF
349 || e->kind == XPR_ALIGNOFT
350 || e->kind == XPR_ALIGNOF
351 || e->kind == XPR_SIZEOFT
352 || e->kind == XPR_SIZEOF)
353 {
354 /* don't free anything */
355 }
356 else
357 {
358 /* multiVal_free (e->val); */
359 cstring_free (e->etext);
360 fileloc_free (e->loc);
361 sRefSet_free (e->uses);
362 sRefSet_free (e->sets);
363 sRefSet_free (e->msets);
364 guardSet_free (e->guards);
365 exprData_freeShallow (e->edata, e->kind);
366 nowalloc--;
367 /*@-compdestroy@*/ sfree (e); /*@=compdestroy@*/
368 /*@-branchstate@*/
369 }
370 }
371 } /*@=branchstate@*/
372 }
373 }
374
375void
376exprNode_free (exprNode e)
377{
378 if (!exprNode_isError (e))
379 {
380 if (!inEffect)
381 {
382 multiVal_free (e->val);
383 cstring_free (e->etext);
384 fileloc_free (e->loc);
385 sRefSet_free (e->uses);
386 sRefSet_free (e->sets);
387 sRefSet_free (e->msets);
388 guardSet_free (e->guards);
389 exprData_free (e->edata, e->kind);
390
bb25bea6 391 constraintList_free(e->requiresConstraints);
392 constraintList_free(e->ensuresConstraints);
393 constraintList_free(e->trueEnsuresConstraints);
394 constraintList_free(e->falseEnsuresConstraints);
395
396 e->requiresConstraints = NULL;
397 e->ensuresConstraints = NULL;
398 e->trueEnsuresConstraints = NULL;
399 e->falseEnsuresConstraints = NULL;
400
616915dd 401 nowalloc--;
402 sfree (e);
403 /*@-branchstate@*/
404 } /*@=branchstate@*/
405 }
406}
407
408exprNode
409exprNode_makeError ()
410{
411 return exprNode_undefined;
412}
413
414static /*@out@*/ /*@only@*/ /*@notnull@*/ exprNode
415exprNode_new (void)
416{
417 exprNode ret = (exprNode) dmalloc (sizeof (*ret));
418 /* static int lastexpnodes = 0; */
419
420 nowalloc++;
421 totalloc++;
422
423 if (nowalloc > maxalloc)
424 {
425 maxalloc = nowalloc;
426 }
427
428 return ret;
429}
430
431static /*@notnull@*/ /*@special@*/ exprNode
432 exprNode_createPlain (ctype c)
433 /*@defines result@*/
28bf4b0b 434 /*@ensures isnull result->edata, result->loc, result->val, result->guards,
435 result->uses, result->sets, result->msets, result->etext @*/
616915dd 436 /*@*/
437{
438 exprNode e = exprNode_new ();
439
440 e->typ = c;
441 e->kind = XPR_EMPTY;
442 e->val = multiVal_undefined;
02b84d4b 443 e->sref = sRef_undefined;
616915dd 444 e->etext = cstring_undefined;
445 e->loc = fileloc_undefined;
446 e->guards = guardSet_undefined;
447 e->uses = sRefSet_undefined;
448 e->sets = sRefSet_undefined;
449 e->msets = sRefSet_undefined;
450 e->edata = exprData_undefined;
451 e->exitCode = XK_NEVERESCAPE;
452 e->canBreak = FALSE;
453 e->mustBreak = FALSE;
454 e->isJumpPoint = FALSE;
8ac07c2e 455
456 exprNode_defineConstraints(e);
457
616915dd 458 return (e);
459}
460
461/*@observer@*/ exprNode exprNode_makeMustExit (void)
462{
02b84d4b 463 if (exprNode_isUndefined (s_mustExitNode))
616915dd 464 {
02b84d4b 465 s_mustExitNode = exprNode_createPlain (ctype_unknown);
466 s_mustExitNode->exitCode = XK_MUSTEXIT;
616915dd 467 }
468
02b84d4b 469 return s_mustExitNode;
616915dd 470}
471
472
473static /*@notnull@*/ /*@special@*/ exprNode exprNode_create (ctype c)
474 /*@defines result@*/
475 /*@post:isnull result->edata, result->guards, result->val,
476 result->uses, result->sets, result->msets@*/
477 /*@*/
478{
479 exprNode e = exprNode_createPlain (c);
480 e->loc = fileloc_copy (g_currentloc);
481 return (e);
482}
483
484static /*@notnull@*/ /*@special@*/ exprNode exprNode_createUnknown (void)
485 /*@defines result@*/
486 /*@post:isnull result->edata, result->guards,
487 result->uses, result->sets, result->msets@*/
488 /*@*/
489{
490 return (exprNode_create (ctype_unknown));
491}
492
493static /*@notnull@*/ /*@special@*/ exprNode
494 exprNode_createLoc (ctype c, /*@keep@*/ fileloc loc)
495 /*@defines result@*/
496 /*@post:isnull result->edata, result->guards, result->val,
497 result->uses, result->sets, result->msets@*/
498 /*@*/
499{
500 exprNode e = exprNode_createPlain (c);
501 e->loc = loc;
502 return (e);
503}
504
505static void
506 exprNode_copySets (/*@special@*/ /*@notnull@*/ exprNode ret, exprNode e)
507 /*@defines ret->guards, ret->uses, ret->sets, ret->msets@*/
508{
509 if (exprNode_isDefined (e))
510 {
511 ret->guards = guardSet_copy (e->guards);
512 ret->uses = sRefSet_newCopy (e->uses);
513 ret->sets = sRefSet_newCopy (e->sets);
514 ret->msets = sRefSet_newCopy (e->msets);
515 }
516 else
517 {
518 ret->guards = guardSet_undefined;
519 ret->uses = sRefSet_undefined;
520 ret->sets = sRefSet_undefined;
521 ret->msets = sRefSet_undefined;
522 }
523}
524
525static /*@notnull@*/ /*@special@*/ exprNode
526 exprNode_createPartialLocCopy (exprNode e, /*@only@*/ fileloc loc)
527 /*@defines result@*/
528 /*@post:isnull result->edata, result->etext@*/
529 /*@*/
530{
531 exprNode ret = exprNode_new ();
532
533 if (exprNode_isError (e))
534 {
535 ret->typ = ctype_unknown;
536 ret->val = multiVal_undefined;
537 ret->loc = loc;
538 ret->guards = guardSet_undefined;
539 ret->uses = sRefSet_undefined;
540 ret->sets = sRefSet_undefined;
541 ret->msets = sRefSet_undefined;
542 }
543 else
544 {
545 ret->typ = e->typ;
546 ret->val = multiVal_copy (e->val);
547 ret->loc = loc;
548 ret->guards = guardSet_copy (e->guards);
549 ret->uses = sRefSet_newCopy (e->uses);
550 ret->sets = sRefSet_newCopy (e->sets);
551 ret->msets = sRefSet_newCopy (e->msets);
552 }
553
554 ret->kind = XPR_EMPTY;
02b84d4b 555 ret->sref = sRef_undefined;
616915dd 556 ret->etext = cstring_undefined;
557 ret->exitCode = XK_NEVERESCAPE;
558 ret->canBreak = FALSE;
559 ret->mustBreak = FALSE;
560 ret->isJumpPoint = FALSE;
561 ret->edata = exprData_undefined;
562
bb25bea6 563 exprNode_defineConstraints(ret);
564
616915dd 565 return (ret);
566}
567
568
569static /*@notnull@*/ /*@special@*/ exprNode
570 exprNode_createPartialCopy (exprNode e)
571 /*@defines result@*/
572 /*@post:isnull result->edata, result->etext@*/
573 /*@*/
574{
575 return (exprNode_createPartialLocCopy (e, fileloc_copy (exprNode_loc (e))));
576}
577
578static /*@notnull@*/ /*@special@*/ exprNode
579 exprNode_createPartialNVCopy (exprNode e)
580 /*@defines result@*/
581 /*@post:isnull result->edata, result->etext, result->val @*/
582 /*@*/
583{
584 exprNode ret = exprNode_new ();
585
586 if (exprNode_isError (e))
587 {
588 ret->typ = ctype_unknown;
589 ret->loc = fileloc_undefined;
590 ret->guards = guardSet_undefined;
591 ret->uses = sRefSet_undefined;
592 ret->sets = sRefSet_undefined;
593 ret->msets = sRefSet_undefined;
594 }
595 else
596 {
597 ret->typ = e->typ;
598 ret->loc = fileloc_copy (e->loc);
599 ret->guards = guardSet_copy (e->guards);
600 ret->uses = sRefSet_newCopy (e->uses);
601 ret->sets = sRefSet_newCopy (e->sets);
602 ret->msets = sRefSet_newCopy (e->msets);
603 }
604
605 ret->val = multiVal_undefined;
606 ret->kind = XPR_EMPTY;
02b84d4b 607 ret->sref = sRef_undefined;
616915dd 608 ret->etext = cstring_undefined;
609 ret->exitCode = XK_NEVERESCAPE;
610 ret->canBreak = FALSE;
611 ret->mustBreak = FALSE;
612 ret->isJumpPoint = FALSE;
613 ret->edata = exprData_undefined;
614
bb25bea6 615 exprNode_defineConstraints(ret);
616
616915dd 617 return (ret);
618}
619
620static /*@notnull@*/ /*@special@*/ exprNode
621 exprNode_createSemiCopy (exprNode e)
622 /*@defines result@*/
623 /*@post:isnull result->edata, result->etext, result->sets,
624 result->msets, result->uses, result->guards@*/
625 /*@*/
626{
627 if (exprNode_isError (e))
628 {
629 return exprNode_createPlain (ctype_unknown);
630 }
631 else
632 {
633 exprNode ret = exprNode_new ();
634
635 ret->typ = e->typ;
636 ret->val = multiVal_copy (e->val);
637 ret->loc = fileloc_copy (e->loc);
638 ret->guards = guardSet_undefined;
639 ret->uses = sRefSet_undefined;
640 ret->sets = sRefSet_undefined;
641 ret->msets = sRefSet_undefined;
642
643 ret->kind = XPR_EMPTY;
02b84d4b 644 ret->sref = sRef_undefined;
616915dd 645 ret->etext = cstring_undefined;
646 ret->exitCode = XK_NEVERESCAPE;
647 ret->canBreak = FALSE;
648 ret->mustBreak = FALSE;
649 ret->isJumpPoint = FALSE;
650 ret->edata = exprData_undefined;
651
bb25bea6 652 exprNode_defineConstraints(ret);
653
616915dd 654 return (ret);
655 }
656}
657
658bool
659exprNode_isNullValue (exprNode e)
660{
661 if (exprNode_isDefined (e))
662 {
663 multiVal m = exprNode_getValue (e);
664
665 if (multiVal_isInt (m))
666 {
667 return (multiVal_forceInt (m) == 0);
668 }
669 }
670
671 return FALSE;
672}
673
674static bool
675exprNode_isUnknownConstant (/*@notnull@*/ exprNode e)
676{
677 while (e->kind == XPR_PARENS)
678 {
679 e = exprData_getUopNode (e->edata);
1bd8c30f 680
681 if (!exprNode_isDefined (e))
682 {
683 return FALSE;
684 }
685
686 /* evans 2002-02-05: was llassert (exprNode_isDefined (e)); but this can fail */
616915dd 687 }
688
689 if (e->kind == XPR_CONST)
690 {
691 multiVal m = exprNode_getValue (e);
692
693 if (multiVal_isUnknown (m))
694 {
695 return TRUE;
696 }
697 }
698
699 return FALSE;
700}
701
702/*@only@*/ exprNode
703 exprNode_numLiteral (ctype c, /*@temp@*/ cstring t,
704 /*@only@*/ fileloc loc, long val)
705{
706 exprNode e = exprNode_createLoc (c, loc);
707
708 e->kind = XPR_NUMLIT;
709
710 llassert (multiVal_isUndefined (e->val));
711 e->val = multiVal_makeInt (val);
712 e->edata = exprData_makeLiteral (cstring_copy (t));
713
714 if (val == 0)
715 {
716 e->sref = sRef_makeUnknown ();
717 sRef_setDefNull (e->sref, e->loc);
718 }
719
720 DPRINTF (("Num lit: %s / %s", exprNode_unparse (e), ctype_unparse (exprNode_getType (e))));
721 return (e);
722}
723
724/*@only@*/ exprNode
725exprNode_charLiteral (char c, cstring text, /*@only@*/ fileloc loc)
726{
727 exprNode e = exprNode_createLoc (ctype_char, loc);
728
729 if (context_getFlag (FLG_CHARINTLITERAL))
730 {
731 e->typ = ctype_makeConj (ctype_char, ctype_int);
732 }
733
734 e->kind = XPR_NUMLIT;
735 e->val = multiVal_makeChar (c);
736
737 e->edata = exprData_makeLiteral (cstring_copy (text));
738 return (e);
739}
740
741/*@only@*/ exprNode
742exprNode_floatLiteral (double d, ctype ct, cstring text, /*@only@*/ fileloc loc)
743{
744 exprNode e = exprNode_createLoc (ct, loc);
745
746 e->kind = XPR_NUMLIT;
747 e->val = multiVal_makeDouble (d);
748 e->edata = exprData_makeLiteral (cstring_copy (text));
749 return (e);
750}
751
752multiVal exprNode_getValue (exprNode e)
753{
754 while (exprNode_isInParens (e)) {
755 if (e->edata != NULL) {
756 e = exprData_getUopNode (e->edata);
757 } else {
758 break;
759 }
760 }
761
762 if (exprNode_isDefined (e)) {
763 return e->val;
764 } else {
765 return multiVal_undefined;
766 }
767}
768
769/*@only@*/ exprNode
28bf4b0b 770exprNode_combineLiterals (exprNode e, exprNode rest)
771{
772 cstring ns;
773
774 /* Both must be string literals. */
775
776 if (exprNode_isUndefined (rest) || exprNode_isUndefined (e))
777 {
778 exprNode_free (rest);
779 return e;
780 }
781
782 if (!exprNode_isStringLiteral (e))
783 {
784 voptgenerror
785 (FLG_SYNTAX,
786 message ("Constant concatentation is ungrammatical: %s %s", exprNode_unparse (e),
787 exprNode_unparse (rest)),
788 e->loc);
789 exprNode_free (rest);
790 return e;
791 }
792
793 if (!exprNode_isStringLiteral (rest))
794 {
795 voptgenerror
796 (FLG_SYNTAX,
797 message ("Constant concatentation is ungrammatical: %s %s", exprNode_unparse (e), exprNode_unparse (rest)),
798 rest->loc);
799
800 exprNode_free (rest);
801 return e;
802 }
803
804 ns = cstring_concat (multiVal_forceString (exprNode_getValue (e)),
805 multiVal_forceString (exprNode_getValue (rest)));
806
807 multiVal_free (e->val);
808 exprData_free (e->edata, e->kind);
809 e->edata = exprData_makeLiteral (cstring_copy (ns));
810 e->val = multiVal_makeString (ns);
811 exprNode_free (rest);
812 return e;
813}
814
815/*@only@*/ exprNode
816exprNode_rawStringLiteral (/*@only@*/ cstring t, /*@only@*/ fileloc loc)
616915dd 817{
818 exprNode e = exprNode_createLoc (ctype_string, loc);
abd7f895 819 size_t len = cstring_length (t);
616915dd 820
821 if (context_getFlag (FLG_STRINGLITERALLEN))
822 {
abd7f895 823 if (len > size_fromInt (context_getValue (FLG_STRINGLITERALLEN)))
616915dd 824 {
825 voptgenerror (FLG_STRINGLITERALLEN,
826 message
827 ("String literal length (%d) exceeds maximum "
28bf4b0b 828 "length (%d): \"%s\"",
abd7f895 829 size_toInt (len),
616915dd 830 context_getValue (FLG_STRINGLITERALLEN),
831 t),
832 e->loc);
833 }
834 }
835
616915dd 836 e->kind = XPR_STRINGLITERAL;
28bf4b0b 837 e->val = multiVal_makeString (cstring_copy (t));
616915dd 838 e->edata = exprData_makeLiteral (t);
12f2ffe9 839 e->sref = sRef_makeConst (ctype_string);
616915dd 840
841 if (context_getFlag (FLG_READONLYSTRINGS))
842 {
843 sRef_setAliasKind (e->sref, AK_STATIC, fileloc_undefined);
844 sRef_setExKind (e->sref, XO_OBSERVER, loc);
845 }
846 else
847 {
848 sRef_setAliasKind (e->sref, AK_ERROR, fileloc_undefined);
849 }
850
851 return (e); /* s released */
852}
853
e0b363ad 854/*@only@*/ exprNode
855exprNode_wideStringLiteral (/*@only@*/ cstring t, /*@only@*/ fileloc loc)
856{
857 exprNode res = exprNode_stringLiteral (t, loc);
858 res->typ = ctype_makeWideString ();
e0b363ad 859 return res;
860}
861
28bf4b0b 862/*@only@*/ exprNode
863exprNode_stringLiteral (/*@only@*/ cstring t, /*@only@*/ fileloc loc)
864{
e5081f8c 865 size_t len = size_fromInt (size_toInt (cstring_length (t)) - 2);
28bf4b0b 866 char *ts = cstring_toCharsSafe (t);
867 char *s = cstring_toCharsSafe (cstring_create (len + 1));
868
869 llassert (*ts == '\"' && *(ts + len + 1) == '\"');
abd7f895 870 strncpy (s, ts+1, len);
28bf4b0b 871 *(s + len) = '\0';
872 cstring_free (t);
873 return exprNode_rawStringLiteral (cstring_fromCharsO (s), loc);
874}
875
616915dd 876exprNode exprNode_fromUIO (cstring c)
877{
878 fileloc loc = context_getSaveLocation ();
879 exprNode e = exprNode_createPlain (ctype_unknown);
880
881 e->kind = XPR_VAR;
882
883 if (fileloc_isUndefined (loc))
884 {
885 loc = fileloc_copy (g_currentloc);
886 }
887
888 e->loc = loc; /* save loc was mangled */
02b84d4b 889 e->sref = sRef_undefined;
616915dd 890
891 if (usymtab_exists (c))
892 {
893 uentry ue = usymtab_lookupEither (c);
894
895 if (uentry_isDatatype (ue)
896 && uentry_isSpecified (ue))
897 {
898 llfatalerror
899 (message ("%q: Specified datatype %s used in code, but not defined. "
900 "(Cannot continue reasonably from this error.)",
901 fileloc_unparse (e->loc), c));
902 }
903 else
904 {
905 BADBRANCH;
906 }
907 }
908
909 llassertprint (!usymtab_exists (c), ("Entry exists: %s", c));
910
911 /*
912 ** was supercedeGlobalEntry...is this better?
913 */
914
915 if (!context_inIterEnd ())
916 {
917 if (context_inMacro ())
918 {
919 if (context_getFlag (FLG_UNRECOG))
920 {
921 voptgenerror
922 (FLG_MACROUNDEF,
923 message ("Unrecognized identifier in macro definition: %s", c), e->loc);
924 }
925 else
926 {
927 flagcode_recordSuppressed (FLG_UNRECOG);
928 }
929 }
930 else
931 {
932 voptgenerror
28bf4b0b 933 (FLG_UNRECOG, message ("Unrecognized identifier: %s", c), e->loc);
616915dd 934 }
935 }
936
937 e->edata = exprData_makeId (uentry_makeUnrecognized (c, fileloc_copy (loc)));
938
939 /* No alias errors for unrecognized identifiers */
940 sRef_setAliasKind (e->sref, AK_ERROR, loc);
941
942 return (e);
943}
944
5c2f3045 945exprNode exprNode_makeConstantString (cstring c, /*@only@*/ fileloc loc)
946{
947 exprNode e = exprNode_createPlain (ctype_unknown);
948 e->kind = XPR_VAR;
949 e->loc = loc;
950 e->sref = sRef_makeConst (ctype_string);
951 e->edata = exprData_makeId (uentry_makeUnrecognized (c, fileloc_copy (loc)));
952 e->typ = ctype_string;
a956d444 953
5c2f3045 954 /* No alias errors for unrecognized identifiers */
955 sRef_setAliasKind (e->sref, AK_STATIC, loc);
956 sRef_setExKind (e->sref, XO_OBSERVER, loc);
957
958 return (e);
959}
960
616915dd 961exprNode exprNode_createId (/*@observer@*/ uentry c)
962{
963 if (uentry_isValid (c))
964 {
965 exprNode e = exprNode_new ();
a956d444 966
967 DPRINTF (("create id: %s", uentry_unparse (c)));
968
616915dd 969 e->typ = uentry_getType (c);
970
971 if (uentry_isFunction (c)
972 && !sRef_isLocalVar (uentry_getSref (c)))
973 {
974 e->sref = sRef_undefined;
975 }
976 else
977 {
978 e->sref = uentry_getSref (c);
979 }
980
981 if (sRef_isStateUnknown (e->sref) && uentry_isNonLocal (c))
982 {
983 sRef_setDefined (e->sref, fileloc_undefined);
984 }
985
986 /*
987 ** yoikes! leaving this out was a heinous bug...that would have been
1b8ae690 988 ** caught if i had splint working first. gag!
616915dd 989 */
990
991 e->etext = cstring_undefined;
992
993 if (uentry_isEitherConstant (c))
994 {
995 e->kind = XPR_CONST;
996 e->val = multiVal_copy (uentry_getConstantValue (c));
997 }
998 else
999 {
1000 e->kind = XPR_VAR;
1001 e->val = multiVal_unknown ();
1002 }
1003
1004 e->edata = exprData_makeId (c);
1005 e->loc = context_getSaveLocation ();
1006
1007 if (fileloc_isUndefined (e->loc))
1008 {
1009 fileloc_free (e->loc);
1010 e->loc = fileloc_copy (g_currentloc);
1011 }
1012
1013 e->guards = guardSet_new ();
10fac4bc 1014
616915dd 1015 e->sets = sRefSet_new ();
1016 e->msets = sRefSet_new ();
1017 e->uses = sRefSet_new ();
1018
1b8ae690 1019 /*> missing fields, detected by splint <*/
616915dd 1020 e->exitCode = XK_NEVERESCAPE;
1021 e->isJumpPoint = FALSE;
1022 e->canBreak = FALSE;
1023 e->mustBreak = FALSE;
1024
02b84d4b 1025 exprNode_defineConstraints (e);
616915dd 1026 return e;
1027 }
1028 else
1029 {
28bf4b0b 1030 return exprNode_createUnknown ();
616915dd 1031 }
1032}
1033
1034/*@notnull@*/ exprNode
1035exprNode_fromIdentifier (/*@observer@*/ uentry c)
1036{
1037 exprNode ret;
1038
1039 if (context_justPopped ()) /* watch out! c could be dead */
1040 {
16c024b5 1041 uentry ce = usymtab_lookupSafe (cscannerHelp_observeLastIdentifier ());
616915dd 1042
1043 if (uentry_isValid (ce))
1044 {
1045 c = ce;
1046 }
1047 else
1048 {
1049 llbuglit ("Looks like Aunt Millie forgot to walk to dog again.");
1050 }
1051 }
1052
1053 ret = exprNode_fromIdentifierAux (c);
616915dd 1054 return ret;
1055}
1056
7534721d 1057static void exprNode_checkStringLiteralLength (ctype t1, exprNode e2)
1058{
1059 multiVal mval = exprNode_getValue (e2);
1060 cstring slit;
37ae0b5e 1061 size_t len;
7534721d 1062
1063 if (ctype_isFixedArray (t1))
1064 {
37ae0b5e 1065 size_t nelements = ctype_getArraySize (t1);
7534721d 1066
1067 llassert (multiVal_isString (mval));
1068 slit = multiVal_forceString (mval);
1810fe2a 1069
1070 len = cstring_lengthExpandEscapes (slit);
1071
abd7f895 1072 llassert (exprNode_isDefined (e2));
1073
7534721d 1074 if (len == nelements)
1075 {
1810fe2a 1076 mstring temp;
1077
abd7f895 1078 temp = cstring_expandEscapes (slit);
1810fe2a 1079
1080 if (temp[len-1] == '\0')
1081 {
1082 voptgenerror
1083 (FLG_STRINGLITNOROOMFINALNULL,
1084 message ("String literal with %d character%& "
1085 "is assigned to %s (no room for final null terminator): %s",
e5081f8c 1086 size_toInt (len + 1),
1810fe2a 1087 ctype_unparse (t1),
1088 exprNode_unparse (e2)),
1089 e2->loc);
1090 }
1091 else
1092 {
abd7f895 1093 voptgenerror
1094 (FLG_STRINGLITNOROOM,
1095 message ("String literal with %d character%& "
1096 "is assigned to %s (no room for null terminator): %s",
e5081f8c 1097 size_toInt (len + 1),
abd7f895 1098 ctype_unparse (t1),
1099 exprNode_unparse (e2)),
1100 e2->loc);
1810fe2a 1101 }
7534721d 1102 }
1103 else if (len > nelements)
1104 {
1105 voptgenerror
1106 (FLG_STRINGLITTOOLONG,
1810fe2a 1107 message ("String literal with %d character%& (counting null terminator) "
7534721d 1108 "is assigned to %s (insufficient storage available): %s",
e5081f8c 1109 size_toInt (len + 1),
7534721d 1110 ctype_unparse (t1),
1111 exprNode_unparse (e2)),
1112 e2->loc);
1113 }
1114 else if (len < nelements - 1)
1115 {
1116 voptgenerror
1117 (FLG_STRINGLITSMALLER,
1118 message ("String literal with %d character%& is assigned to %s (possible waste of storage): %s",
e5081f8c 1119 size_toInt (len + 1),
7534721d 1120 ctype_unparse (t1),
1121 exprNode_unparse (e2)),
1122 e2->loc);
1123 }
1124 else
1125 {
1126 ; /* okay */
1127 }
1128 }
1129}
1130
616915dd 1131static /*@only@*/ /*@notnull@*/ exprNode
1132exprNode_fromIdentifierAux (/*@observer@*/ uentry c)
1133{
1134 exprNode e = exprNode_createId (c);
1135 sRef sr = e->sref;
1136
1137 uentry_setUsed (c, e->loc);
1138
28bf4b0b 1139 if (uentry_isVar (c) && sRef_isFileOrGlobalScope (sr))
616915dd 1140 {
1141 checkGlobUse (c, FALSE, e);
1142 }
1143
1144 return (e);
1145}
1146
1147static bool
1148exprNode_isZero (exprNode e)
1149{
1150 if (exprNode_isDefined (e))
1151 {
1152 multiVal m = exprNode_getValue (e);
1153
1154 if (multiVal_isInt (m))
1155 {
1156 return (multiVal_forceInt (m) == 0);
1157 }
1158 }
1159
1160 return FALSE;
1161}
1162
1163static bool
1164exprNode_isNonNegative (exprNode e)
1165{
1166 if (exprNode_isDefined (e))
1167 {
1168 multiVal m = exprNode_getValue (e);
1169
1170 if (multiVal_isInt (m))
1171 {
1172 return (multiVal_forceInt (m) >= 0);
1173 }
a956d444 1174
1175 /*
1176 ** This is not always true if programmer defines enum
1177 ** values, but then the constant should be known.
1178 */
1179
1180 if (ctype_isEnum (ctype_realType (e->typ)))
1181 {
1182 return TRUE;
1183 }
616915dd 1184 }
1185
1186 return FALSE;
1187}
1188
1189/*
1190** a[x] - uses a but NOT a[]
1191** result sref = a[] (set/use in assignment)
1192**
1193** The syntax x[a] is also legal in C, and has the same
1194** semantics. If ind is an array, and arr is an int, flip
1195** the arguments.
1196*/
1197
1198/*@only@*/ exprNode
1199exprNode_arrayFetch (/*@only@*/ exprNode e1, /*@only@*/ exprNode e2)
1200{
1201 /*
1202 ** error in arr, error propagates (no new messages)
1203 ** error in ind, assume valid and continue
1204 */
1205
68de3f33 1206 DPRINTF (("Array fetch: %s / %s",
1207 exprNode_unparse (e1), exprNode_unparse (e2)));
1208
616915dd 1209 if (exprNode_isError (e1))
1210 {
1211 exprNode_free (e2);
1212 return (exprNode_makeError ());
1213 }
1214 else
1215 {
1216 exprNode arr;
1217 exprNode ind;
1218 ctype carr = exprNode_getType (e1);
1219 ctype crarr = ctype_realType (carr);
1220
1221 /*
1222 ** this sets up funny aliasing, that leads to spurious
1b8ae690 1223 ** splint errors. Hence, the i2 comments.
616915dd 1224 */
1225
68de3f33 1226 /* evans 2001-09-09 added ctype_isKnown so there is no swap when e1 type is unknown */
1227 if (ctype_isKnown (crarr)
1228 && !ctype_isRealArray (crarr)
616915dd 1229 && ctype_isRealNumeric (crarr)
1230 && !exprNode_isError (e2)
1231 && ctype_isRealAP (exprNode_getType (e2))) /* fetch like 3[a] */
1232 {
1233 arr = e2;
1234 ind = e1;
1235
1236 carr = exprNode_getType (arr);
1237 crarr = ctype_realType (carr);
1238 }
1239 else
1240 {
1241 arr = e1;
1242 ind = e2;
1243 }
1244
68de3f33 1245 DPRINTF (("arr: %s", exprNode_unparse (arr)));
1246
616915dd 1247 if (sRef_possiblyNull (arr->sref))
1248 {
1249 if (!usymtab_isGuarded (arr->sref))
1250 {
edad9a7f 1251 if (!context_inSizeof() )
616915dd 1252 {
edad9a7f 1253 if (optgenerror (FLG_NULLDEREF,
1254 message ("Index of %s pointer %q: %s",
1255 sRef_nullMessage (arr->sref),
1256 sRef_unparse (arr->sref),
1257 exprNode_unparse (arr)),
1258 arr->loc))
1259 {
1260 DPRINTF (("ref: %s", sRef_unparseFull (arr->sref)));
1261 sRef_showNullInfo (arr->sref);
1262
1263 /* suppress future messages */
1264 sRef_setNullError (arr->sref);
1265 }
616915dd 1266 }
1267 }
1268 }
1269
1270 if (exprNode_isError (ind))
1271 {
1272 if ((ctype_isArrayPtr (crarr)
1273 && !ctype_isFunction (crarr))
1274 || ctype_isUnknown (carr))
1275 {
1276 exprNode ret = exprNode_createPartialCopy (arr);
1277
1278 if (ctype_isKnown (carr))
1279 {
1280 ret->typ = ctype_baseArrayPtr (crarr);
1281 }
1282 else
1283 {
1284 ret->typ = ctype_unknown;
1285 }
1286
1287 ret->sref = sRef_makeArrayFetch (arr->sref);
1288
1289 ret->kind = XPR_FETCH;
1290
1291 /*
1292 ** Because of funny aliasing (when arr and ind are
1293 ** flipped) spurious errors would be reported here.
1294 */
1295
1296 /*@i2@*/ ret->edata = exprData_makePair (arr, ind);
1297 checkSafeUse (ret, arr->sref);
1298 return (ret);
1299 }
1300 else
1301 {
1302 voptgenerror (FLG_TYPE,
1303 message ("Array fetch from non-array (%t): %s[%s]", carr,
1304 exprNode_unparse (e1), exprNode_unparse (e2)),
1305 arr->loc);
1306 exprNode_free (arr);
1307 return (exprNode_makeError ());
1308 }
1309 }
1310 else
1311 {
1312 if (!ctype_isForceRealInt (&(ind->typ)))
1313 {
1314 ctype rt = ctype_realType (ind->typ);
1315
1316 if (ctype_isChar (rt))
1317 {
1318 vnoptgenerror
1319 (FLG_CHARINDEX,
1320 message ("Array fetch using non-integer, %t: %s[%s]",
1321 ind->typ,
1322 exprNode_unparse (e1), exprNode_unparse (e2)),
1323 arr->loc);
1324 }
1325 else if (ctype_isEnum (rt))
1326 {
1327 vnoptgenerror
1328 (FLG_ENUMINDEX,
1329 message ("Array fetch using non-integer, %t: %s[%s]",
1330 ind->typ,
1331 exprNode_unparse (e1), exprNode_unparse (e2)),
1332 arr->loc);
1333 }
b73d1009 1334 else if (ctype_isNumAbstract (rt))
1335 {
1336 vnoptgenerror
1337 (FLG_NUMABSTRACTINDEX,
1338 message ("Array fetch using numabstract type, %t: %s[%s]",
1339 ind->typ,
1340 exprNode_unparse (e1), exprNode_unparse (e2)),
1341 arr->loc);
1342 }
616915dd 1343 else
1344 {
1345 voptgenerror
1346 (FLG_TYPE,
1347 message ("Array fetch using non-integer, %t: %s[%s]",
1348 ind->typ,
1349 exprNode_unparse (e1), exprNode_unparse (e2)),
1350 arr->loc);
1351 }
1352
1353 multiVal_free (ind->val);
1354 ind->val = multiVal_unknown ();
1355 }
1356
1357 if (ctype_isArrayPtr (crarr) && !ctype_isFunction (crarr))
1358 {
1359 exprNode ret = exprNode_createSemiCopy (arr);
1360 multiVal m = exprNode_getValue (ind);
1361
1362 ret->typ = ctype_baseArrayPtr (crarr);
1363 ret->kind = XPR_FETCH;
1364
1365 if (multiVal_isInt (m))
1366 {
1367 int i = (int) multiVal_forceInt (m);
1368
1369 if (sRef_isValid (arr->sref)) {
1370 ret->sref = sRef_makeArrayFetchKnown (arr->sref, i);
1371 } else {
1372 ret->sref = sRef_undefined;
1373 }
1374 }
1375 else
1376 {
28bf4b0b 1377 ret->sref = sRef_makeArrayFetch (arr->sref);
616915dd 1378 }
1379
1380 ret->sets = sRefSet_realNewUnion (arr->sets, ind->sets);
1381 ret->msets = sRefSet_realNewUnion (arr->msets, ind->msets);
1382 ret->uses = sRefSet_realNewUnion (arr->uses, ind->uses);
1383
1384 /* (see comment on spurious errors above) */
1385 /*@i2@*/ ret->edata = exprData_makePair (arr, ind);
1386
1387 exprNode_checkUse (ret, ind->sref, ind->loc);
1388 exprNode_checkUse (ret, arr->sref, arr->loc);
1389
1390 return (ret);
1391 }
1392 else
1393 {
1394 if (ctype_isUnknown (carr))
1395 {
1396 exprNode ret = exprNode_createPartialCopy (arr);
1397
1398 ret->kind = XPR_FETCH;
1399 ret->typ = ctype_unknown;
1400 ret->sets = sRefSet_union (ret->sets, ind->sets);
1401 ret->msets = sRefSet_union (ret->msets, ind->msets);
1402 ret->uses = sRefSet_union (ret->uses, ind->uses);
1403
1404 /* (see comment on spurious errors above) */
1405 /*@i2@*/ ret->edata = exprData_makePair (arr, ind);
1406
1407 exprNode_checkUse (ret, ind->sref, ind->loc);
1408 exprNode_checkUse (ret, arr->sref, arr->loc);
1409 return (ret);
1410 }
1411 else
1412 {
1413 voptgenerror
1414 (FLG_TYPE,
1415 message ("Array fetch from non-array (%t): %s[%s]", carr,
1416 exprNode_unparse (e1), exprNode_unparse (e2)),
1417 arr->loc);
1418
1419 exprNode_free (arr);
1420 exprNode_free (ind);
1421
1422 return (exprNode_makeError ());
1423 }
1424 }
1425 }
1426 }
1427 BADEXIT;
1428}
1429
1430
1431static int
1432checkArgs (uentry fcn, /*@dependent@*/ exprNode f, ctype t,
1433 exprNodeList args, exprNode ret)
1434{
1435 return (checkArgsReal (fcn, f, ctype_argsFunction (t), args, FALSE, ret));
1436}
1437
1438/*
1439** checkPrintfArgs --- checks arguments for printf-like functions
1440** Arguments before ... have already been checked.
1441** The argument before the ... is a char *.
1442** argno is the format string argument.
1443*/
1444
1445static void
1446checkPrintfArgs (/*@notnull@*/ /*@dependent@*/ exprNode f, uentry fcn,
1447 exprNodeList args, exprNode ret, int argno)
1448{
1449 /*
1450 ** the last argument before the elips is the format string
1451 */
1452
1453 int i = argno;
1454 fileloc formatloc;
1455 int nargs = exprNodeList_size (args);
1456 uentryList params = uentry_getParams (fcn);
1457 exprNode a;
1458
1459 /*
1460 ** These should be ensured by checkSpecialFunction
1461 */
1462
1463 llassert (uentryList_size (params) == argno + 1);
1464 llassert (uentry_isElipsisMarker (uentryList_getN (params, argno)));
1465
1466 a = exprNodeList_getN (args, argno - 1);
1467 formatloc = fileloc_copy (exprNode_loc (a));
1468
1469 if (exprNode_isDefined (a) && exprNode_isStringLiteral (a)
1470 && exprNode_knownStringValue (a))
1471 {
1472 char *format = cstring_toCharsSafe (multiVal_forceString (exprNode_getValue (a)));
1473 char *code = format;
1474 char *ocode = code;
1475
1476 nargs = exprNodeList_size (args);
1477
1478 while ((code = strchr (code, '%')) != NULL)
1479 {
1480 char *origcode = code;
28bf4b0b 1481 cstring codetext = cstring_newEmpty ();
616915dd 1482 char key = *(++code);
1483 ctype modtype = ctype_int;
1484 bool modified = FALSE;
1485
1486 fileloc_addColumn (formatloc, code - ocode);
1487
28bf4b0b 1488 codetext = cstring_appendChar (codetext, key);
1489
616915dd 1490 /* ignore flags */
1491 while (isFlagKey (key))
1492 {
1493 key = *(++code);
28bf4b0b 1494 codetext = cstring_appendChar (codetext, key);
616915dd 1495 fileloc_incColumn (formatloc);
1496 }
1497
1498 if (key == 'm') /* skipped in syslog */
1499 {
1500 continue;
1501 }
1502
1503 /* ignore field width */
1504 while (isdigit ((int) key) != 0)
1505 {
1506 key = *(++code);
28bf4b0b 1507 codetext = cstring_appendChar (codetext, key);
616915dd 1508 fileloc_incColumn (formatloc);
1509 }
1510
1511 /* ignore precision */
1512 if (key == '.')
1513 {
1514 key = *(++code);
28bf4b0b 1515 codetext = cstring_appendChar (codetext, key);
616915dd 1516 fileloc_incColumn (formatloc);
1517
1518 /*
1519 ** In printf, '*' means: read the next arg as an int for the
1520 ** field width. This seems to be missing from my copy of the
1521 ** standard x3.159-1989. Setion 4.9.6.1 refers to * (described
1522 ** later) but never does.
1523 */
1524
1525 if (key == '*')
1526 {
1527 ; /* don't do anything --- handle later */
1528 }
1529 else
1530 {
1531 while (isdigit ((int) key) != 0)
1532 {
1533 key = *(++code);
28bf4b0b 1534 codetext = cstring_appendChar (codetext, key);
616915dd 1535 fileloc_incColumn (formatloc);
1536 }
1537 }
1538 }
1539
1540 if (key == 'h')
1541 {
1542 modtype = ctype_sint; /* short */
1543 key = *(++code);
28bf4b0b 1544 codetext = cstring_appendChar (codetext, key);
616915dd 1545 fileloc_incColumn (formatloc);
1546 }
1547 else if (key == 'l' || key == 'L')
1548 {
1549 modtype = ctype_lint; /* long */
1550 key = *(++code);
28bf4b0b 1551 codetext = cstring_appendChar (codetext, key);
616915dd 1552 fileloc_incColumn (formatloc);
1553
1554 if (key == 'l' || key == 'L') {
1555 modtype = ctype_llint; /* long long */
1556 key = *(++code);
28bf4b0b 1557 codetext = cstring_appendChar (codetext, key);
616915dd 1558 fileloc_incColumn (formatloc);
1559 }
1560 }
1561 else
1562 {
1563 ; /* no modifier */
1564 }
1565
1566 /* now, key = type of conversion to apply */
1567 ++code;
1568 fileloc_incColumn (formatloc);
1569
1570 if (key != '%')
1571 {
1572 if (i >= nargs)
1573 {
1574 if (optgenerror
1575 (FLG_TYPE,
1576 message ("No argument corresponding to %q format "
28bf4b0b 1577 "code %d (%%%s): \"%s\"",
616915dd 1578 uentry_getName (fcn),
28bf4b0b 1579 i, codetext,
616915dd 1580 cstring_fromChars (format)),
1581 f->loc))
1582 {
1583 if (fileloc_isDefined (formatloc)
1584 && context_getFlag (FLG_SHOWCOL))
1585 {
1586 llgenindentmsg (cstring_makeLiteral ("Corresponding format code"),
1587 formatloc);
1588 }
1589 }
1590 i++;
1591 }
1592 else
1593 {
1594 a = exprNodeList_getN (args, i);
1595 i++;
1596
1597 if (!exprNode_isError (a))
1598 {
1599 ctype expecttype;
1600
1601 switch (key)
1602 {
1603 case '*': /* int argument for fieldwidth */
1604 expecttype = ctype_int;
1605 *(--code) = '%'; /* convert it for next code */
1606 fileloc_subColumn (formatloc, 1);
1607 /*@switchbreak@*/ break;
1608 case 'u':
1609 case 'o':
1610 expecttype = ctype_combine (ctype_uint, modtype);
1611 /*@switchbreak@*/ break;
1612
1613 case 'i': /* int argument */
1614 case 'd':
1615 expecttype = ctype_combine (ctype_int, modtype);
1616 /*@switchbreak@*/ break;
1617
28bf4b0b 1618 case 'x': /* unsigned int */
616915dd 1619 case 'X':
28bf4b0b 1620 expecttype = ctype_combine (ctype_uint, modtype);
1621
616915dd 1622 /*@switchbreak@*/ break;
1623
1624 case 'e':
1625 case 'E':
1626 case 'g':
1627 case 'G':
1628 case 'f': /* double */
1629 expecttype = ctype_combine (ctype_double, modtype);
1630 /*@switchbreak@*/ break;
1631
1632 case 'c': /* int converted to char (check its a char?) */
2209bcb7 1633 expecttype = ctype_makeConj (ctype_int,
1634 ctype_makeConj (ctype_char,
1635 ctype_uchar));
2209bcb7 1636 /* evans 2001-10-05 - changed to reflect correct ISO spec:
1637 int converted to char */
1638
616915dd 1639 /*@switchbreak@*/ break;
1640
1641 case 's': /* string */
1642 expecttype = ctype_string;
1643 /*@switchbreak@*/ break;
1644 case '[':
1645 /* skip to ']' */
1646 while (((key = *(++code)) != ']')
1647 && (key != '\0'))
1648 {
28bf4b0b 1649 codetext = cstring_appendChar (codetext, key);
616915dd 1650 fileloc_incColumn (formatloc);
1651 }
1652
1653 if (key == '\0')
1654 {
1655 llfatalerrorLoc
1656 (message ("Bad character set format: %s",
1657 cstring_fromChars (origcode)));
1658 }
1659
1660 expecttype = ctype_string;
1661 /*@switchbreak@*/ break;
1662
1663 case 'p': /* pointer */
1664 expecttype = ctype_makePointer (ctype_void);
393e573f 1665 /* need not be defined */
1666 uentry_setDefState (regArg, SS_RELDEF);
1667 sRef_setPosNull (uentry_getSref (regArg),
1668 fileloc_undefined);
1669 /* could be null */
616915dd 1670 /*@switchbreak@*/ break;
1671
1672 case 'n': /* pointer to int, modified by call! */
1673 expecttype = ctype_combine (ctype_makePointer (ctype_int), modtype);
1674 modified = TRUE;
1675 uentry_setDefState (regArg, SS_ALLOCATED); /* corresponds to out */
1676 /*@switchbreak@*/ break;
1677
1678 case 'm': /* in a syslog, it doesn't consume an argument */
1679 /* should check we're really doing syslog */
1680
1681 /*@switchbreak@*/ break;
1682
1683
1684 default:
1685 expecttype = ctype_unknown;
1686
1687 voptgenerror
1688 (FLG_FORMATCODE,
1689 message ("Unrecognized format code: %s",
1690 cstring_fromChars (origcode)),
1691 fileloc_isDefined (formatloc)
1692 ? formatloc : g_currentloc);
1693
1694 /*@switchbreak@*/ break;
1695 }
1696
1697 if (!(exprNode_matchArgType (expecttype, a)))
1698 {
1699 if (ctype_isVoidPointer (expecttype)
1700 && ctype_isRealAbstract (a->typ)
1701 && (context_getFlag (FLG_ABSTVOIDP)))
1702 {
1703 ;
1704 }
1705 else
1706 {
1707 if (llgenformattypeerror
1708 (expecttype, exprNode_undefined,
1709 a->typ, a,
28bf4b0b 1710 message ("Format argument %d to %q (%%%s) expects "
616915dd 1711 "%t gets %t: %s",
1712 i - argno,
1713 uentry_getName (fcn),
28bf4b0b 1714 codetext,
1715 expecttype,
616915dd 1716 a->typ, exprNode_unparse (a)),
1717 a->loc))
1718 {
1719 if (fileloc_isDefined (formatloc)
1720 && context_getFlag (FLG_SHOWCOL))
1721 {
1722 llgenindentmsg
1723 (cstring_makeLiteral
1724 ("Corresponding format code"),
1725 formatloc);
1726 }
1727 }
1728 }
1729 }
1730
1731 uentry_setType (regArg, expecttype);
1732 checkOneArg (regArg, a, f, FALSE, i+1, nargs);
1733
1734 if (ctype_equal (expecttype, ctype_string))
1735 {
1736 exprNode_checkUse (a, sRef_makePointer (a->sref), a->loc);
1737 }
1738
1739 uentry_setType (regArg, ctype_unknown);
1740 uentry_fixupSref (regArg);
346fab44 1741
616915dd 1742 if (modified)
1743 {
1744 exprNode_checkCallModifyVal (a->sref, args, f, ret);
1745 }
1746 }
1747 else
1748 {
1749 ;
1750 }
1751 }
1752 }
28bf4b0b 1753
616915dd 1754 ocode = code;
28bf4b0b 1755 cstring_free (codetext);
616915dd 1756 }
1757
1758 if (i < nargs)
1759 {
1760 voptgenerror (FLG_TYPE,
28bf4b0b 1761 message ("Format string for %q has %d arg%&, given %d",
616915dd 1762 uentry_getName (fcn), i - argno, nargs - argno),
1763 f->loc);
1764 }
1765 }
1766 else
1767 {
1768 /* no checking possible for compile-time unknown format strings */
28bf4b0b 1769 if (exprNode_isDefined (a))
1770 {
1771 voptgenerror
1772 (FLG_FORMATCONST,
1773 message ("Format string parameter to %s is not a compile-time constant: %s",
1774 exprNode_unparse (f),
1775 exprNode_unparse (a)),
1776 f->loc);
1777 }
616915dd 1778 }
28bf4b0b 1779
616915dd 1780 fileloc_free (formatloc);
1781}
1782
1783static void
1784checkScanfArgs (/*@notnull@*/ /*@dependent@*/ exprNode f, uentry fcn,
1785 exprNodeList args, exprNode ret, int argno)
1786{
1787 int i = argno;
1788 fileloc formatloc;
1789 int nargs = exprNodeList_size (args);
1790 uentryList params = uentry_getParams (fcn);
1791 exprNode a;
1792
1793 /*
1794 ** These should be ensured by checkSpecialFunction
1795 */
1796
1797 llassert (uentryList_size (params) == argno + 1);
1798 llassert (uentry_isElipsisMarker (uentryList_getN (params, argno)));
1799
1800 a = exprNodeList_getN (args, argno - 1);
1801 formatloc = fileloc_copy (exprNode_loc (a));
1802
1803 if (exprNode_isDefined (a) && exprNode_isStringLiteral (a)
1804 && exprNode_knownStringValue (a))
1805 {
1806 char *format = cstring_toCharsSafe (multiVal_forceString (exprNode_getValue (a)));
1807 char *code = format;
1808 char *ocode = code;
1809
1810 nargs = exprNodeList_size (args);
1811
1812 while ((code = strchr (code, '%')) != NULL)
1813 {
1814 char *origcode = code;
1815 char key = *(++code);
28bf4b0b 1816 cstring codetext = cstring_newEmpty ();
616915dd 1817 ctype modtype = ctype_int;
1818 char modifier = '\0';
1819 bool modified = TRUE;
1820 bool ignore = FALSE;
1821
28bf4b0b 1822 codetext = cstring_appendChar (codetext, key);
616915dd 1823 fileloc_addColumn (formatloc, code - ocode);
1824
1825 /*
1826 ** this is based on ANSI standard library description of fscanf
1827 ** (from ANSI standard X3.159-1989, 4.9.6.1)
1828 */
1829
1830 /* '*' suppresses assignment (does not need match argument) */
1831
1832 if (key == '*')
1833 {
1834 key = *(++code);
28bf4b0b 1835 codetext = cstring_appendChar (codetext, key);
616915dd 1836 modified = FALSE;
1837 ignore = TRUE;
1838 fileloc_incColumn (formatloc);
1839 }
1840
1841 /* ignore field width */
1842 while (isdigit ((int) key) != 0)
1843 {
1844 key = *(++code);
28bf4b0b 1845 codetext = cstring_appendChar (codetext, key);
616915dd 1846 fileloc_incColumn (formatloc);
1847 }
1848
1849 if (key == 'h')
1850 {
1851 modtype = ctype_sint; /* short */
1852 key = *(++code);
28bf4b0b 1853 codetext = cstring_appendChar (codetext, key);
616915dd 1854 fileloc_incColumn (formatloc);
1855 }
1856 else if (key == 'l' || key == 'L')
1857 {
1858 modtype = ctype_lint; /* long */
1859 modifier = key;
1860
1861 key = *(++code);
28bf4b0b 1862 codetext = cstring_appendChar (codetext, key);
1863
616915dd 1864 fileloc_incColumn (formatloc);
1865
1866 if (key == 'l' || key == 'L') {
1867 modtype = ctype_llint; /* long long */
1868 key = *(++code);
28bf4b0b 1869 codetext = cstring_appendChar (codetext, key);
616915dd 1870 fileloc_incColumn (formatloc);
1871 }
1872 }
1873 else
1874 {
1875 ; /* no modifier */
1876 }
1877
1878 /* now, key = type of conversion to apply */
1879 ++code;
1880 fileloc_incColumn (formatloc);
1881
1882 if (key != '%')
1883 {
1884 if (ignore)
1885 {
1886 ;
1887 }
1888 else
1889 {
1890 if (i >= nargs)
1891 {
1892 if (optgenerror
1893 (FLG_TYPE,
1894 message ("No argument corresponding to %q format "
28bf4b0b 1895 "code %d (%%%s): \"%s\"",
616915dd 1896 uentry_getName (fcn),
28bf4b0b 1897 i, codetext,
616915dd 1898 cstring_fromChars (format)),
1899 f->loc))
1900 {
1901 if (fileloc_isDefined (formatloc)
1902 && context_getFlag (FLG_SHOWCOL))
1903 {
1904 llgenindentmsg
1905 (cstring_makeLiteral ("Corresponding format code"),
1906 formatloc);
1907 }
1908 }
1909 i++;
1910 }
1911 else
1912 {
1913 a = exprNodeList_getN (args, i);
1914 i++;
1915
1916 if (!exprNode_isError (a))
1917 {
1918 ctype expecttype;
1919
1920 switch (key)
1921 {
1922 case '*': /* int argument for fieldwidth */
1923 expecttype = ctype_makePointer (ctype_int);
1924 *(--code) = '%'; /* convert it for next code */
1925 fileloc_subColumn (formatloc, 1);
1926 /*@switchbreak@*/ break;
1927 case 'u':
1928 case 'o':
1929 expecttype = ctype_makePointer (ctype_combine (ctype_uint, modtype));
1930 /*@switchbreak@*/ break;
1931
1932 case 'i':
1933 case 'd':
e0a05ba9 1934 expecttype = ctype_makePointer (ctype_combine (ctype_int, modtype));
1935 /*@switchbreak@*/ break;
1936
616915dd 1937 case 'x':
1938 case 'X': /* unsigned int */
e0a05ba9 1939 expecttype = ctype_makePointer (ctype_combine (ctype_uint, modtype));
616915dd 1940 /*@switchbreak@*/ break;
1941
1942 case 'e':
1943 case 'E':
1944 case 'g':
1945 case 'G':
1946 case 'f':
1947 /* printf is double, scanf is float! */
1948
1949 if (modifier == 'l')
1950 {
1951 expecttype = ctype_makePointer (ctype_double);
1952 }
1953 else if (modifier == 'L')
1954 {
1955 expecttype = ctype_makePointer (ctype_ldouble);
1956 }
1957 else
1958 {
1959 llassert (modifier == '\0');
1960 expecttype = ctype_makePointer (ctype_float);
1961 }
1962 /*@switchbreak@*/ break;
1963
1964 case 'c': /* int converted to char (check its a char?) */
1965 expecttype = ctype_makePointer (ctype_makeConj (ctype_char, ctype_uchar));
1966 /*@switchbreak@*/ break;
1967
1968 case 's': /* string */
1969 expecttype = ctype_string;
1970 /*@switchbreak@*/ break;
1971
1972 case '[':
1973 /* skip to ']' */
1974 while (((key = *(++code)) != ']')
1975 && (key != '\0'))
1976 {
28bf4b0b 1977 codetext = cstring_appendChar (codetext, key);
616915dd 1978 fileloc_incColumn (formatloc);
1979 }
1980
1981 if (key == '\0')
1982 {
1983 llfatalerrorLoc
1984 (message ("Bad character set format: %s",
1985 cstring_fromChars (origcode)));
1986 }
1987
1988 expecttype = ctype_string;
1989 /*@switchbreak@*/ break;
346fab44 1990
616915dd 1991
1992 case 'p': /* pointer */
346fab44 1993 voptgenerror
1994 (FLG_FORMATCODE,
1995 message ("Format code should not be used in scanf: %s",
1996 cstring_fromChars (origcode)),
1997 fileloc_isDefined (formatloc)
1998 ? formatloc : g_currentloc);
1999
616915dd 2000 expecttype = ctype_unknown;
616915dd 2001 /*@switchbreak@*/ break;
2002
2003 case 'n': /* pointer to int, modified by call! */
2004 expecttype = ctype_makePointer (ctype_int);
2005 /*@switchbreak@*/ break;
2006
2007 default:
2008 expecttype = ctype_unknown;
2009
2010 voptgenerror
2011 (FLG_FORMATCODE,
2012 message ("Unrecognized format code: %s",
2013 cstring_fromChars (origcode)),
2014 fileloc_isDefined (formatloc)
2015 ? formatloc : g_currentloc);
2016
2017 /*@switchbreak@*/ break;
2018 }
2019
2020 if (!(exprNode_matchArgType (expecttype, a)))
2021 {
2022 if (ctype_isVoidPointer (expecttype)
2023 && ctype_isRealAbstract (a->typ)
2024 && (context_getFlag (FLG_ABSTVOIDP)))
2025 {
2026 ;
2027 }
2028 else
2029 {
28bf4b0b 2030 if (llgenformattypeerror
2031 (expecttype, exprNode_undefined,
2032 a->typ, a,
2033 message ("Format argument %d to %q (%%%s) expects "
2034 "%t gets %t: %s",
2035 i - argno,
2036 uentry_getName (fcn),
2037 codetext, expecttype,
2038 a->typ, exprNode_unparse (a)),
2039 a->loc))
616915dd 2040 {
28bf4b0b 2041 if (fileloc_isDefined (formatloc)
2042 && context_getFlag (FLG_SHOWCOL))
616915dd 2043 {
28bf4b0b 2044 llgenindentmsg
2045 (cstring_makeLiteral
2046 ("Corresponding format code"),
2047 formatloc);
616915dd 2048 }
2049 }
2050 }
2051 }
2052
2053 uentry_setType (outArg, expecttype);
2054 checkOneArg (outArg, a, f, FALSE, i+1, nargs);
2055 uentry_setType (outArg, ctype_unknown);
2056 uentry_fixupSref (outArg);
2057
2058 if (modified)
2059 {
2060 exprNode_checkCallModifyVal (a->sref, args, f, ret);
2061 }
2062 }
2063 else
2064 {
02b84d4b 2065 /* a->sref = sRef_undefined; */
616915dd 2066 }
2067 }
2068 }
2069 }
28bf4b0b 2070
616915dd 2071 ocode = code;
28bf4b0b 2072 cstring_free (codetext);
616915dd 2073 }
2074
2075 if (i < nargs)
2076 {
2077 voptgenerror (FLG_TYPE,
28bf4b0b 2078 message ("Format string for %q has %d arg%&, given %d",
616915dd 2079 uentry_getName (fcn), i - argno, nargs - argno),
2080 f->loc);
2081 }
2082 }
2083 else
2084 {
2085 /* no checking possible for compile-time unknown format strings */
2086 }
2087
2088 fileloc_free (formatloc);
2089}
2090
2091static void
2092checkMessageArgs (/*@notnull@*/ /*@dependent@*/ exprNode f,
2093 uentry fcn,
2094 exprNodeList args,
2095 /*@unused@*/ int argno)
2096{
2097 /*
2098 ** the last argument before the elips is the format string
2099 */
2100
2101 int nargs = exprNodeList_size (args);
2102 int i = argno;
2103 fileloc formatloc;
2104 exprNode a;
2105
2106 a = exprNodeList_getN (args, argno - 1);
2107 formatloc = fileloc_copy (exprNode_loc (a));
2108
2109 if (ctype_isUnknown (cstringType)) {
2110 if (usymtab_existsType (cstring_makeLiteralTemp ("cstring")))
2111 {
2112 cstringType = usymtab_lookupAbstractType (cstring_makeLiteralTemp ("cstring"));
2113 }
2114 }
2115
2116 if (ctype_isUnknown (ctypeType)) {
2117 if (usymtab_existsType (cstring_makeLiteralTemp ("ctype")))
2118 {
2119 ctypeType = usymtab_lookupAbstractType (cstring_makeLiteralTemp ("ctype"));
2120 }
2121 }
2122
2123 if (ctype_isUnknown (filelocType)) {
2124 if (usymtab_existsType (cstring_makeLiteralTemp ("fileloc")))
2125 {
2126 filelocType = usymtab_lookupAbstractType (cstring_makeLiteralTemp ("fileloc"));
2127 }
2128 }
2129
2130 if (exprNode_isDefined (a) && exprNode_isStringLiteral (a)
2131 && exprNode_knownStringValue (a))
2132 {
2133 cstring format = multiVal_forceString (exprNode_getValue (a));
2134 char *code = cstring_toCharsSafe (format);
2135 char *ocode = code;
2136
2137 nargs = exprNodeList_size (args);
2138
2139 while ((code = strchr (code, '%')) != NULL)
2140 {
2141 char *origcode = code;
2142 char key = *(++code);
28bf4b0b 2143 cstring codetext = cstring_newEmpty ();
616915dd 2144 bool isOnly = FALSE;
2145
28bf4b0b 2146 codetext = cstring_appendChar (codetext, key);
2147
616915dd 2148 fileloc_addColumn (formatloc, code - ocode);
2149
2150 while (key >= '0' && key <= '9')
2151 {
2152 key = *(++code);
28bf4b0b 2153 codetext = cstring_appendChar (codetext, key);
616915dd 2154 fileloc_incColumn (formatloc);
2155 }
2156
2157 ++code;
2158 fileloc_incColumn (formatloc);
2159
2160 if (key != '%')
2161 {
28bf4b0b 2162 if (key == '&') /* plural marker */
616915dd 2163 {
2164 goto nextKey;
2165 }
2166
2167 if (i >= nargs)
2168 {
2169 voptgenerror
2170 (FLG_TYPE,
28bf4b0b 2171 message ("Message missing format arg %d (%%%s): \"%s\"",
2172 i + 1, codetext, format),
616915dd 2173 f->loc);
2174 i++;
2175 }
2176 else
2177 {
2178 a = exprNodeList_getN (args, i);
2179 i++;
2180
2181 nextKey:
2182 if (!exprNode_isError (a))
2183 {
2184 ctype expecttype;
2185
2186 /*@-loopswitchbreak@*/
2187
2188 switch (key)
2189 {
2190 case 'c':
2191 case 'h':
2192 expecttype = ctype_char; break;
2193 case 's':
2194 expecttype = cstringType; break;
2195 case 'q':
2196 expecttype = cstringType; isOnly = TRUE; break;
2197 case 'x':
2198 expecttype = cstringType; isOnly = TRUE; break;
2199 case 'd': expecttype = ctype_int; break;
2200 case 'u': expecttype = ctype_uint; break;
2201 case 'w': expecttype = ctype_ulint; break;
2202 case 'f': expecttype = ctype_float; break;
2203 case 'b': expecttype = ctype_bool; break;
2204 case 't': expecttype = ctypeType; break;
393e573f 2205 case 'p':
2206 expecttype = ctype_makePointer (ctype_void);
2207 /* need not be defined */
2208 uentry_setDefState (regArg, SS_RELDEF);
2209 sRef_setPosNull (uentry_getSref (regArg),
2210 fileloc_undefined);
2211 /* could be null */
2212 /*@switchbreak@*/ break;
616915dd 2213 case 'l': expecttype = filelocType; break;
28bf4b0b 2214 case '&': /* a wee bit of a hack methinks */
616915dd 2215 expecttype = ctype_int;
2216 break;
2217 case 'r': expecttype = ctype_bool; break;
2218 default:
2219 expecttype = ctype_unknown;
2220 voptgenerror
2221 (FLG_FORMATCODE,
2222 message ("Unrecognized format code: %s",
2223 cstring_fromChars (origcode)),
2224 fileloc_isDefined (formatloc)
2225 ? formatloc : g_currentloc);
2226 break;
2227 }
2228 /*@=loopswitchbreak@*/
2229
2230 if (!(exprNode_matchArgType (expecttype, a)))
2231 {
2232 if (ctype_isVoidPointer (expecttype)
2233 && ctype_isRealAbstract (a->typ)
2234 && (context_getFlag (FLG_ABSTVOIDP)))
2235 {
2236 ;
2237 }
2238 else
2239 {
2240 if (llgenformattypeerror
2241 (expecttype, exprNode_undefined,
2242 a->typ, a,
28bf4b0b 2243 message ("Format argument %d to %q (%%%s) expects "
616915dd 2244 "%t gets %t: %s",
2245 i - argno,
2246 uentry_getName (fcn),
28bf4b0b 2247 codetext, expecttype,
616915dd 2248 a->typ, exprNode_unparse (a)),
2249 a->loc))
b73d1009 2250 {
616915dd 2251 if (fileloc_isDefined (formatloc)
2252 && context_getFlag (FLG_SHOWCOL))
2253 {
2254 llgenindentmsg
2255 (cstring_makeLiteral
2256 ("Corresponding format code"),
2257 formatloc);
2258 }
2259 }
2260 }
2261 }
2262
2263 if (ctype_equal (expecttype, cstringType))
2264 {
2265 if (isOnly)
2266 {
2267 checkOneArg (csOnlyArg, a, f, FALSE, i+1, nargs);
2268 uentry_fixupSref (csOnlyArg);
2269 }
2270 else
2271 {
2272 checkOneArg (csArg, a, f, FALSE, i+1, nargs);
2273 uentry_fixupSref (csArg);
2274 }
2275 }
2276 else
2277 {
2278 checkOneArg (regArg, a, f, FALSE, i+1, nargs);
2279 uentry_fixupSref (regArg);
2280 }
2281 }
2282 }
2283 }
28bf4b0b 2284
2285 cstring_free (codetext);
616915dd 2286 }
2287
2288 if (i < nargs)
2289 {
2290 voptgenerror (FLG_TYPE,
28bf4b0b 2291 message ("Format string for %q has %d arg%&, given %d",
616915dd 2292 uentry_getName (fcn), i - argno, nargs -argno),
2293 f->loc);
2294 }
2295 }
2296 else
2297 {
2298 /* no checking possible for compile-time unknown format strings */
2299 }
2300
2301 fileloc_free (formatloc);
2302}
2303
2304static void
2305 checkExpressionDefinedAux (/*@notnull@*/ exprNode e1,
2306 /*@notnull@*/ exprNode e2,
2307 sRefSet sets1,
2308 sRefSet sets2,
2309 lltok op,
2310 flagcode flag)
2311{
2312 bool hadUncon = FALSE;
2313
28bf4b0b 2314 if (sRef_isFileOrGlobalScope (sRef_getRootBase (e1->sref)) &&
616915dd 2315 sRefSet_hasUnconstrained (sets2))
2316 {
2317 voptgenerror
2318 (FLG_EVALORDERUNCON,
2319 message
2320 ("Expression may have undefined behavior (%q used in right operand "
2321 "may set global variable %q used in left operand): %s %s %s",
2322 sRefSet_unparseUnconstrained (sets2),
2323 sRef_unparse (sRef_getRootBase (e1->sref)),
2324 exprNode_unparse (e1), lltok_unparse (op), exprNode_unparse (e2)),
2325 e2->loc);
2326 }
2327
28bf4b0b 2328 if (sRef_isFileOrGlobalScope (sRef_getRootBase (e2->sref)) &&
616915dd 2329 sRefSet_hasUnconstrained (sets1))
2330 {
2331 voptgenerror
2332 (FLG_EVALORDERUNCON,
2333 message
2334 ("Expression has undefined behavior (%q used in left operand "
2335 "may set global variable %q used in right operand): %s %s %s",
2336 sRefSet_unparseUnconstrained (sets1),
2337 sRef_unparse (e2->sref),
2338 exprNode_unparse (e1), lltok_unparse (op), exprNode_unparse (e2)),
2339 e2->loc);
2340 }
2341
2342 sRefSet_realElements (e1->uses, sr)
2343 {
2344 if (sRef_isMeaningful (sr) && sRefSet_member (sets2, sr))
2345 {
2346 voptgenerror
2347 (FLG_EVALORDER,
2348 message
2349 ("Expression has undefined behavior (left operand uses %q, "
2350 "modified by right operand): %s %s %s",
2351 sRef_unparse (sr),
2352 exprNode_unparse (e1), lltok_unparse (op), exprNode_unparse (e2)),
2353 e2->loc);
2354 }
2355 } end_sRefSet_realElements;
2356
2357 sRefSet_realElements (sets1, sr)
2358 {
2359 if (sRef_isMeaningful (sr))
2360 {
2361 if (sRef_same (sr, e2->sref))
2362 {
2363 voptgenerror
2364 (flag,
2365 message
2366 ("Expression has undefined behavior (value of right operand "
2367 "modified by left operand): %s %s %s",
2368 exprNode_unparse (e1), lltok_unparse (op), exprNode_unparse (e2)),
2369 e2->loc);
2370 }
2371 else if (sRefSet_member (e2->uses, sr))
2372 {
2373 voptgenerror
2374 (flag,
2375 message
2376 ("Expression has undefined behavior (left operand modifies %q, "
2377 "used by right operand): %s %s %s",
2378 sRef_unparse (sr),
2379 exprNode_unparse (e1), lltok_unparse (op), exprNode_unparse (e2)),
2380 e2->loc);
2381 }
2382 else
2383 {
2384 if (sRefSet_member (sets2, sr))
2385 {
2386 if (sRef_isUnconstrained (sr))
2387 {
2388 if (hadUncon)
2389 {
2390 ;
2391 }
2392 else
2393 {
2394 hadUncon = optgenerror
2395 (FLG_EVALORDERUNCON,
2396 message
2397 ("Expression may have undefined behavior. Left operand "
2398 "calls %q; right operand calls %q. The unconstrained "
2399 "functions may modify global state used by "
2400 "the other operand): %s %s %s",
2401 sRefSet_unparseUnconstrained (sets1),
2402 sRefSet_unparseUnconstrained (sets2),
2403 exprNode_unparse (e1), lltok_unparse (op),
2404 exprNode_unparse (e2)),
2405 e2->loc);
2406 }
2407 }
2408 else
2409 {
2410 voptgenerror
2411 (flag,
2412 message
2413 ("Expression has undefined behavior (both "
2414 "operands modify %q): %s %s %s",
2415 sRef_unparse (sr),
2416 exprNode_unparse (e1),
2417 lltok_unparse (op), exprNode_unparse (e2)),
2418 e2->loc);
2419 }
2420 }
2421 }
2422 }
2423 } end_sRefSet_realElements;
2424}
2425
2426static void checkExpressionDefined (exprNode e1, exprNode e2, lltok op)
2427{
2428 bool hasError = FALSE;
2429
2430 if (exprNode_isError (e1) || exprNode_isError (e2))
2431 {
2432 return;
2433 }
2434
2435 if (sRefSet_member (e2->sets, e1->sref))
2436 {
2437 if (e2->kind == XPR_CALL)
2438 {
2439 ;
2440 }
2441 else
2442 {
2443 hasError = optgenerror
2444 (FLG_EVALORDER,
2445 message ("Expression has undefined behavior "
ccf0a4a8 2446 "(value of left operand %s is modified "
2447 "by right operand %s): %s %s %s",
2448 exprNode_unparse (e1),
2449 exprNode_unparse (e2),
616915dd 2450 exprNode_unparse (e1), lltok_unparse (op),
2451 exprNode_unparse (e2)),
2452 e2->loc);
2453 }
2454 }
2455
2456 if (context_getFlag (FLG_EVALORDERUNCON))
2457 {
2458 if (sRefSet_member (e2->msets, e1->sref))
2459 {
2460 if (e2->kind == XPR_CALL)
2461 {
2462 ;
2463 }
2464 else
2465 {
2466 hasError = optgenerror
2467 (FLG_EVALORDER,
2468 message
2469 ("Expression has undefined behavior (value of left "
2470 "operand may be modified by right operand): %s %s %s",
2471 exprNode_unparse (e1), lltok_unparse (op),
2472 exprNode_unparse (e2)),
2473 e2->loc);
2474 }
2475 }
2476 }
2477
2478 if (!hasError)
2479 {
2480 checkExpressionDefinedAux (e1, e2, e1->sets, e2->sets, op, FLG_EVALORDER);
2481
2482 if (context_maybeSet (FLG_EVALORDERUNCON))
2483 {
2484 checkExpressionDefinedAux (e1, e2, e1->msets,
2485 e2->msets, op, FLG_EVALORDERUNCON);
2486 }
2487 }
2488}
2489
2490static void checkSequencing (exprNode p_f, exprNodeList p_args);
2491
2492static int
2493 checkArgsReal (uentry fcn, /*@dependent@*/ exprNode f, uentryList cl,
2494 exprNodeList args, bool isIter, exprNode ret)
2495{
2496 int special = 0;
2497
2498 if (!exprNode_isError (f))
2499 {
2500 if (!uentryList_isMissingParams (cl))
2501 {
2502 int nargs = exprNodeList_size (args);
2503 int expectargs = uentryList_size (cl);
2504 ctype last;
2505 int i = 0;
2506
2507 if (expectargs == 0)
2508 {
2509 if (nargs != 0)
2510 {
2511 if (isIter)
2512 {
2513 voptgenerror
2514 (FLG_TYPE,
2515 message ("Iter %q invoked with %d args, "
2516 "declared void",
2517 uentry_getName (fcn),
2518 nargs),
2519 f->loc);
2520 }
2521 else
2522 {
2523 voptgenerror
2524 (FLG_TYPE,
2525 message ("Function %s called with %d args, "
2526 "declared void",
2527 exprNode_unparse (f), nargs),
2528 f->loc);
2529 }
2530 }
2531 return special;
2532 }
2533
2534 last = uentry_getType (uentryList_getN (cl, expectargs - 1));
2535
2536 exprNodeList_reset (args);
2537
2538 uentryList_elements (cl, current)
2539 {
2540 ctype ct = uentry_getType (current);
2541 exprNode a;
2542
2543 if (ctype_isElips (ct))
2544 {
2545 /*
2546 ** do special checking for printf/scanf library functions
2547 **
2548 ** this is kludgey code, just for handling the special case
2549 **
2550 */
2551
2552 if (uentry_isPrintfLike (fcn))
2553 {
2554 checkPrintfArgs (f, fcn, args, ret, i);
2555 special = i;
2556 }
2557 else if (uentry_isScanfLike (fcn))
2558 {
2559 checkScanfArgs (f, fcn, args, ret, i);
2560 special = i;
2561 }
2562 else if (uentry_isMessageLike (fcn))
2563 {
2564 checkMessageArgs (f, fcn, args, i);
2565 special = i;
2566 }
2567 else
2568 {
2569 llassert (!uentry_isSpecialFunction (fcn));
2570 }
2571
2572 nargs = expectargs; /* avoid errors */
2573 break;
2574 }
2575 else
2576 {
2577 if (i >= nargs) break;
2578
2579 a = exprNodeList_current (args);
2580 exprNodeList_advance (args);
2581
2582 i++;
2583
2584 if (exprNode_isError (a))
2585 {
2586 ;
2587 }
2588 else
2589 {
2590 /*
2591 probably necessary? I'm not sure about this one
2592 checkMacroParen (a);
2593 */
2594
2595 f->guards = guardSet_union (f->guards, a->guards);
2596
2597 DPRINTF (("match arg: %s / %s", ctype_unparse (ct), ctype_unparse (a->typ)));
e0a05ba9 2598
616915dd 2599 if (!(exprNode_matchArgType (ct, a)))
2600 {
2601 DPRINTF (("Args mismatch!"));
2602
2603 if (ctype_isVoidPointer (ct)
2604 && (ctype_isPointer (a->typ)
2605 && (ctype_isRealAbstract (ctype_baseArrayPtr (a->typ)))))
2606 {
2607 vnoptgenerror
2608 (FLG_ABSTVOIDP,
2609 message
2610 ("Pointer to abstract type (%t) used "
2611 "as void pointer "
2612 "(arg %d to %q): %s",
2613 a->typ, i,
2614 uentry_getName (fcn),
2615 exprNode_unparse (a)),
2616 a->loc);
2617 }
2618 else
2619 {
2620 if (isIter)
2621 {
2622 (void) gentypeerror
2623 (ct, exprNode_undefined,
2624 a->typ, a,
2625 message
2626 ("Iter %q expects arg %d to "
2627 "be %t gets %t: %s",
2628 uentry_getName (fcn),
2629 i, ct, a->typ, exprNode_unparse (a)),
2630 a->loc);
2631 }
2632 else
2633 {
2634 if (gentypeerror
2635 (ct,
2636 exprNode_undefined,
2637 a->typ,
2638 a,
2639 message
2640 ("Function %q expects arg %d to be %t gets %t: %s",
2641 uentry_getName (fcn),
2642 i, ct, a->typ, exprNode_unparse (a)),
2643 a->loc))
2644 {
2645 DPRINTF (("Types: %s / %s",
2646 ctype_unparse (ct),
2647 ctype_unparse (a->typ)));
2648 }
2649
2650 /*
2651 ** Clear null marker for abstract types.
2652 ** (It is not revealed, so suppress future messages.)
2653 */
2654
2655 if (ctype_isAbstract (a->typ))
2656 {
2657 sRef_setNullUnknown (exprNode_getSref (a), a->loc);
2658 }
2659 }
2660 }
2661 }
2662 }
2663 }
2664 } end_uentryList_elements ;
2665
2666
2667 if (expectargs != nargs) /* note: not != since we may have ... */
2668 {
2669 if (ctype_isElips (last))
2670 {
2671 voptgenerror
2672 (FLG_TYPE,
2673 message ("Function %s called with %d args, expects at least %d",
2674 exprNode_unparse (f),
2675 nargs, expectargs - 1),
2676 f->loc);
2677 }
2678 else
2679 {
2680 if (isIter)
2681 {
2682 voptgenerror
2683 (FLG_TYPE,
2684 message ("Iter %q invoked with %d args, expects %d",
2685 uentry_getName (fcn), nargs, expectargs),
2686 f->loc);
2687 }
2688 else
2689 {
2690 voptgenerror
2691 (FLG_TYPE,
2692 message ("Function %s called with %d args, expects %d",
2693 exprNode_unparse (f),
2694 nargs, expectargs),
2695 f->loc);
2696 }
2697 }
2698 }
2699 }
2700 }
2701
2702 return special;
2703}
2704
2705/*
2706** Check for undefined code sequences in function arguments:
2707**
2708** one parameter sets something used by another parameter
2709** one parameter sets something set by another parameter
2710*/
2711
2712static void
2713checkSequencingOne (exprNode f, exprNodeList args,
2714 /*@notnull@*/ exprNode el, int argno)
2715{
2716 /*
2717 ** Do second loop, iff +undefunspec
2718 */
2719
2720 int checkloop;
2721 int numloops = context_maybeSet (FLG_EVALORDERUNCON) ? 2 : 1;
2722
2723 for (checkloop = 0; checkloop < numloops; checkloop++)
2724 {
2725 sRefSet thissets;
2726
2727 if (checkloop == 0)
2728 {
2729 thissets = el->sets;
2730 }
2731 else
2732 {
2733 llassert (checkloop == 1);
2734 thissets = el->msets;
2735 }
2736
2737 sRefSet_realElements (thissets, thisset)
2738 {
2739 int j;
2740
2741 /*@access exprNodeList@*/
2742 for (j = 0; j < args->nelements; j++)
2743 {
2744 exprNode jl = args->elements[j];
2745 int thisargno = j + 1;
2746
2747 if (thisargno != argno && exprNode_isDefined (jl))
2748 {
2749 sRefSet otheruses = jl->uses;
2750
28bf4b0b 2751 if (sRef_isFileOrGlobalScope (sRef_getRootBase (jl->sref)) &&
616915dd 2752 sRefSet_hasUnconstrained (thissets))
2753 {
2754 voptgenerror
2755 (FLG_EVALORDERUNCON,
2756 /*@-sefparams@*/
2757 message
2758 ("%q used in argument %d may set "
2759 "global variable %q used by argument %d: %s(%q)",
2760 cstring_capitalizeFree (sRefSet_unparseUnconstrained (thissets)),
2761 /*@=sefparams@*/
2762 argno,
2763 sRef_unparse (sRef_getRootBase (jl->sref)),
2764 thisargno,
2765 exprNode_unparse (f), exprNodeList_unparse (args)),
2766 el->loc);
2767 }
2768
2769 if (sRefSet_member (otheruses, thisset))
2770 {
2771 if (sRef_isUnconstrained (thisset))
2772 {
2773 voptgenerror
2774 (FLG_EVALORDERUNCON,
2775 message
2776 ("Unconstrained functions used in arguments %d (%q) "
2777 "and %d (%s) may modify "
2778 "or use global state in undefined way: %s(%q)",
2779 argno,
2780 sRefSet_unparseUnconstrainedPlain (otheruses),
2781 thisargno,
2782 sRef_unconstrainedName (thisset),
2783 exprNode_unparse (f),
2784 exprNodeList_unparse (args)),
2785 el->loc);
2786 }
2787 else
2788 {
2789 voptgenerror
2790 (FLG_EVALORDER,
2791 message
2792 ("Argument %d modifies %q, used by argument %d "
2793 "(order of evaluation of actual parameters is "
2794 "undefined): %s(%q)",
2795 argno, sRef_unparse (thisset), thisargno,
2796 exprNode_unparse (f), exprNodeList_unparse (args)),
2797 el->loc);
2798 }
2799 }
2800 else
2801 {
2802 sRefSet othersets = jl->sets;
2803
2804 if (sRefSet_member (othersets, thisset))
2805 {
2806 if (sRef_isUnconstrained (thisset))
2807 {
2808 voptgenerror
2809 (FLG_EVALORDERUNCON,
2810 message
2811 ("Unconstrained functions used in "
2812 "arguments %d (%q) and %d (%s) may modify "
2813 "or use global state in undefined way: %s(%q)",
2814 argno,
2815 sRefSet_unparseUnconstrainedPlain (othersets),
2816 thisargno,
2817 sRef_unconstrainedName (thisset),
2818 exprNode_unparse (f), exprNodeList_unparse (args)),
2819 el->loc);
2820 }
2821 else
2822 {
2823 voptgenerror
2824 (FLG_EVALORDER,
2825 message
2826 ("Argument %d modifies %q, set by argument %d (order of"
2827 " evaluation of actual parameters is undefined): %s(%q)",
2828 argno, sRef_unparse (thisset), thisargno,
2829 exprNode_unparse (f), exprNodeList_unparse (args)),
2830 el->loc);
2831 }
2832 }
2833 }
2834 }
2835 }
2836 /*@noaccess exprNodeList@*/
2837 } end_sRefSet_realElements;
2838 }
2839}
2840
2841static void
2842checkSequencing (exprNode f, exprNodeList args)
2843{
2844 if (exprNodeList_size (args) > 1)
2845 {
2846 int i;
2847 exprNode el;
2848
2849 /*@access exprNodeList*/
2850
2851 for (i = 0; i < args->nelements; i++)
2852 {
2853 el = args->elements[i];
2854
2855 if (!exprNode_isError (el))
2856 {
2857 checkSequencingOne (f, args, el, i + 1);
2858 }
2859 }
2860 /*@noaccess exprNodeList*/
2861 }
2862}
2863
2864/*
2865** requires le = exprNode_getUentry (f)
2866*/
2867
2868static void
2869checkGlobMods (/*@notnull@*/ /*@dependent@*/ exprNode f,
2870 uentry le, exprNodeList args,
2871 /*@notnull@*/ exprNode ret, int specialArgs)
2872{
2873 bool isSpec = FALSE;
2874 bool hasMods = FALSE;
2875 cstring fname;
2876 globSet usesGlobs = globSet_undefined;
2877 sRefSet mods = sRefSet_undefined;
2878 bool freshMods = FALSE;
2879 uentryList params = uentryList_undefined;
2880
28bf4b0b 2881 DPRINTF (("Check glob mods: %s", exprNode_unparse (ret)));
2882
616915dd 2883 /*
2884 ** check globals and modifies
2885 */
2886
2887 setCodePoint ();
2888
2889 if (!uentry_isValid (le))
2890 {
2891 ctype fr = ctype_realType (f->typ);
2892
2893 if (ctype_isFunction (fr))
2894 {
2895 params = ctype_argsFunction (fr);
2896 }
2897 else
2898 {
2899 params = uentryList_missingParams;
2900 }
2901
2902 if (!context_getFlag (FLG_MODNOMODS)
2903 && !context_getFlag (FLG_GLOBUNSPEC))
2904 {
28bf4b0b 2905 checkUnspecCall (f, params, args);
616915dd 2906 }
2907
2908 return;
2909 }
2910
2911 fname = uentry_rawName (le);
2912
2913 setCodePoint ();
2914
2915 if (uentry_isFunction (le))
2916 {
2917 params = uentry_getParams (le);
2918 mods = uentry_getMods (le);
2919 hasMods = uentry_hasMods (le);
2920 usesGlobs = uentry_getGlobs (le);
2921 isSpec = uentry_isSpecified (le);
2922 }
2923 else /* not a function */
2924 {
2925 ctype ct = ctype_realType (uentry_getType (le));
2926
2927 llassertprint (uentry_isVar (le) && ctype_isFunction (ct),
2928 ("checkModGlobs: uentry not a function: %s",
2929 uentry_unparse (le)));
2930
2931 params = ctype_argsFunction (ct);
517a2db3 2932 return; /* No checking for non-function */
616915dd 2933 }
2934
2935 /*
2936 ** check globals
2937 */
2938
2939 setCodePoint ();
616915dd 2940
2941 globSet_allElements (usesGlobs, el)
2942 {
2943 if (sRef_isValid (el))
2944 {
2945 if (sRef_isInternalState (el) || sRef_isSystemState (el))
2946 {
2947 context_usedGlobal (el);
2948 exprNode_checkUse (f, el, f->loc);
2949
2950 if (context_checkInternalUse ())
2951 {
2952 if (!context_globAccess (el))
2953 {
2954 if (sRef_isSystemState (el)
2955 && !context_getFlag (FLG_MODFILESYSTEM))
2956 {
2957 ;
2958 }
2959 else
2960 {
2961 voptgenerror
2962 (FLG_INTERNALGLOBS,
2963 message
2964 ("Called procedure %s may access %q, but "
2965 "globals list does not include globals %s",
2966 exprNode_unparse (f),
2967 sRef_unparse (el),
2968 cstring_makeLiteralTemp (sRef_isInternalState (el)
2969 ? "internalState"
2970 : "fileSystem")),
2971 f->loc);
2972 }
2973 }
2974 }
2975 }
2976 else if (sRef_isNothing (el) || sRef_isSpecState (el))
2977 {
2978 ;
2979 }
2980 else
2981 {
2982 uentry gle = sRef_getUentry (el);
2983 sRef sr = sRef_updateSref (el);
2984
2985 if (sRef_isUndefGlob (el))
2986 {
2987 sRef_setDefined (sr, f->loc);
2988 exprNode_checkSet (f, sr);
2989 }
2990 else
2991 {
2992 /*
2993 ** check definition
2994 */
2995
2996 if (sRef_isAllocated (el))
2997 {
2998 exprNode_checkSet (f, sr);
2999 }
3000 else
3001 {
3002 if (sRef_isStateUndefined (sr))
3003 {
3004 voptgenerror
3005 (FLG_GLOBSTATE,
3006 message
3007 ("%s %q used by function undefined before call: %s",
3008 sRef_getScopeName (sr),
3009 sRef_unparse (sr),
3010 exprNode_unparse (f)),
3011 f->loc);
3012 sRef_setDefined (sr, f->loc);
3013 }
3014 exprNode_checkUse (f, sr, f->loc);
3015 }
3016
3017 checkGlobUse (gle, TRUE, f);
3018 }
3019
3020 if (sRef_isKilledGlob (el))
3021 {
3022 sRef_kill (sr, f->loc);
3023 context_usedGlobal (sr);
3024 }
3025 }
3026 }
3027 } end_globSet_allElements;
3028
3029 /*
3030 ** check modifies
3031 */
3032
3033 if (context_hasMods () || context_getFlag (FLG_MODNOMODS))
3034 {
3035 sRefSet smods = sRefSet_undefined;
3036
3037 /*
3038 ** NEED to check for modifies anything
3039 */
3040
3041 /*
3042 ** check each sRef that called function modifies (ml), is
3043 ** modifiable by tl
3044 */
3045
3046 setCodePoint ();
3047
3048 sRefSet_allElements (mods, s) /* s is something which may be modified */
3049 {
28bf4b0b 3050 DPRINTF (("Check modify: %s", sRef_unparse (s)));
3051
616915dd 3052 if (sRef_isKindSpecial (s))
3053 {
3054 if (sRef_isSpecInternalState (s))
3055 {
3056 if (context_getFlag (FLG_MODINTERNALSTRICT))
3057 {
3058 exprNode_checkCallModifyVal (s, args, f, ret);
3059 }
3060 else
3061 {
3062 sRefSet mmods = context_modList ();
3063
3064 sRefSet_allElements (mmods, el)
3065 {
3066 if (sRef_isInternalState (el))
3067 {
3068 sRef_setModified (el);
3069 }
3070 } end_sRefSet_allElements ;
3071 }
3072 }
3073 else
3074 {
3075 exprNode_checkCallModifyVal (s, args, f, ret);
3076 }
3077 }
3078 else
3079 {
3080 sRef rb = sRef_getRootBase (s);
3081
28bf4b0b 3082 if (sRef_isFileOrGlobalScope (rb))
616915dd 3083 {
3084 context_usedGlobal (rb);
3085 }
3086
3087 if (sRef_isFileStatic (s)
3088 && !fileId_equal (fileloc_fileId (f->loc),
3089 fileloc_fileId (uentry_whereDefined (le))))
3090 {
3091 smods = sRefSet_insert (smods, s);
3092 }
3093 else
3094 {
3095 exprNode_checkCallModifyVal (s, args, f, ret);
3096 }
3097 }
3098 } end_sRefSet_allElements;
3099
3100 setCodePoint ();
3101
3102 /*
3103 ** Static elements in modifies set can have nasty consequences.
3104 ** (I think...have not been able to reproduce a possible bug.)
3105 */
3106
3107 if (!sRefSet_isDefined (smods))
3108 {
3109 mods = sRefSet_newCopy (mods);
3110 freshMods = TRUE;
3111
3112 sRefSet_allElements (smods, el)
3113 {
3114 bool res = sRefSet_delete (mods, el);
3115
3116 llassert (res);
3117 } end_sRefSet_allElements;
3118
3119 sRefSet_free (smods);
3120 /*@-branchstate@*/
3121 }
3122 /*@=branchstate@*/
3123 }
3124 else if (sRefSet_isDefined (mods))
3125 { /* just check observers */
3126 setCodePoint ();
3127
3128 sRefSet_allElements (mods, s) /* s is something which may be modified */
3129 {
3130 sRef rb = sRef_getRootBase (s);
3131
3132 setCodePoint ();
3133
3134 if (sRef_isParam (rb))
3135 {
3136 sRef b = sRef_fixBaseParam (s, args);
3137
3138 if (sRef_isObserver (b))
3139 {
51bc6ecc 3140 exprNode e = exprNodeList_nth (args, sRef_getParam (rb));
616915dd 3141
3142 if (optgenerror
3143 (FLG_MODOBSERVER,
3144 message ("Function call may modify observer%q: %s",
3145 sRef_unparsePreOpt (b), exprNode_unparse (e)),
3146 exprNode_loc (e)))
3147 {
3148 sRef_showExpInfo (b);
3149 }
3150 }
3151 }
3152 } end_sRefSet_allElements;
3153 }
3154 else
3155 {
3156 if (!hasMods) /* no specified modifications */
3157 {
3158 if (context_getFlag (FLG_MODOBSERVERUNCON))
3159 {
3160 exprNodeList_elements (args, e)
3161 {
3162 if (exprNode_isDefined (e))
3163 {
3164 sRef s = exprNode_getSref (e);
3165
3166 if (sRef_isObserver (s)
3167 && ctype_isMutable (sRef_getType (s)))
3168 {
3169 if (optgenerror
3170 (FLG_MODOBSERVERUNCON,
3171 message
3172 ("Call to unconstrained function %s may modify observer%q: %s",
3173 exprNode_unparse (f),
3174 sRef_unparsePreOpt (s), exprNode_unparse (e)),
3175 exprNode_loc (e)))
3176 {
3177 sRef_showExpInfo (s);
3178 }
3179 }
3180 }
3181 } end_exprNodeList_elements;
3182 }
3183 }
3184 }
3185
3186 checkAnyCall (f, fname, params, args, hasMods, mods, isSpec, specialArgs);
3187
3188 ret->uses = sRefSet_union (ret->uses, f->uses);
3189 ret->sets = sRefSet_union (ret->sets, f->sets);
3190 ret->msets = sRefSet_union (ret->msets, f->msets);
3191
3192 if (freshMods)
3193 {
3194 /*
1b8ae690 3195 ** Spurious errors reported, because splint can't tell
616915dd 3196 ** mods must be fresh if freshMods is true.
3197 */
3198
3199 /*@i@*/ sRefSet_free (mods);
3200 }
3201
3202 setCodePoint ();
3203}
3204
3205void checkGlobUse (uentry glob, bool isCall, /*@notnull@*/ exprNode e)
3206{
3207 if (uentry_isVar (glob))
3208 {
3209 if (context_inFunctionLike ())
3210 {
3211 sRef sr = uentry_getSref (glob);
3212
3213 context_usedGlobal (sr);
3214
3215 if (context_checkGlobUse (glob))
3216 {
3217 if (!context_globAccess (sr))
3218 {
3219 if (isCall)
3220 {
3221 voptgenerror
3222 (FLG_GLOBALS,
3223 message ("Called procedure %s may access %s %q",
3224 exprNode_unparse (e),
3225 sRef_unparseScope (sr),
3226 uentry_getName (glob)),
3227 e->loc);
3228 }
3229 else
3230 {
3231 voptgenerror
3232 (FLG_GLOBALS,
3233 message ("Undocumented use of %s %s",
3234 sRef_unparseScope (sr),
3235 exprNode_unparse (e)),
3236 e->loc);
3237 }
3238 }
3239 }
3240 }
3241 }
3242 else
3243 {
3244 llbug (message ("Global not variable: %q", uentry_unparse (glob)));
3245 }
3246}
3247
28bf4b0b 3248static void
ccf0a4a8 3249reflectEnsuresClause (exprNode ret, uentry le, exprNode f, exprNodeList args)
28bf4b0b 3250{
3251 DPRINTF (("Reflect ensures clause: %s(%s) / %s / %s",
3252 exprNode_unparse (f), exprNodeList_unparse (args),
3253 uentry_unparseFull (le),
3254 stateClauseList_unparse (uentry_getStateClauseList (le))));
3255
3256 if (uentry_isValid (le) && uentry_isFunction (le))
3257 {
3258 stateClauseList sclauses = uentry_getStateClauseList (le);
3259
3260 if (stateClauseList_isDefined (sclauses))
3261 {
3262 DPRINTF (("Reflect ensures: %s / %s / %s",
3263 uentry_unparse (le),
3264 exprNode_unparse (f), exprNodeList_unparse (args)));
3265
3266 stateClauseList_elements (sclauses, cl)
3267 {
3268 if (stateClause_hasEnsures (cl))
3269 {
3270 /* Same in usymtab.c:1904 */
3271 if (stateClause_setsMetaState (cl))
3272 {
3273 qual q = stateClause_getMetaQual (cl);
3274 annotationInfo ainfo = qual_getAnnotationInfo (q);
3275 metaStateInfo minfo = annotationInfo_getState (ainfo);
3276 cstring key = metaStateInfo_getName (minfo);
3277 int mvalue = annotationInfo_getValue (ainfo);
3278
3279 sRefSet osrs = sRefSet_undefined;
3280 sRefSet srs;
3281
3282 if (stateClause_isGlobal (cl))
3283 {
3284 srs = sRefSet_single (usymtab_lookupGlobalMarker ());
3285 osrs = srs;
3286 }
3287 else
3288 {
3289 srs = stateClause_getRefs (cl);
3290 }
3291
3292 DPRINTF (("Reflect ensures clause: %s", stateClause_unparse (cl)));
3293
3294
3295 DPRINTF (("Sets meta state! %s", stateClause_unparse (cl)));
3296
3297 sRefSet_elements (srs, sel)
3298 {
3299 sRef s;
3300
3301 if (sRef_isResult (sRef_getRootBase (sel)))
3302 {
ccf0a4a8 3303 s = exprNode_getSref (ret);
28bf4b0b 3304 }
3305 else
3306 {
3307 s = sRef_fixBaseParam (sel, args);
28bf4b0b 3308 }
ccf0a4a8 3309
3310 DPRINTF (("Reflecting state clause on: %s / %s",
3311 sRef_unparse (sel), sRef_unparse (s)));
3312
3313 sRef_setMetaStateValueComplete (s, key, mvalue, exprNode_loc (f));
28bf4b0b 3314 } end_sRefSet_elements;
3315
3316 sRefSet_free (osrs);
3317 }
3318 else
3319 {
3320 sRefSet srs = stateClause_getRefs (cl);
3321 sRefModVal modf = stateClause_getEnsuresFunction (cl);
3322 int eparam = stateClause_getStateParameter (cl);
abd7f895 3323
3324 llassert (modf != NULL);
3325
28bf4b0b 3326 DPRINTF (("Reflect after clause: %s / %s",
3327 stateClause_unparse (cl),
3328 sRefSet_unparse (srs)));
3329
3330 sRefSet_elements (srs, sel)
3331 {
3332 sRef s;
3333
3334 DPRINTF (("elements: %s", sRef_unparse (sel)));
3335 DPRINTF (("elements: %s", sRef_unparseFull (sel)));
3336
3337 if (sRef_isResult (sRef_getRootBase (sel)))
3338 {
ccf0a4a8 3339 DPRINTF (("Fix base: %s / %s",
3340 sRef_unparse (sel), sRef_unparse (exprNode_getSref (ret))));
3341 s = sRef_fixBase (sel, exprNode_getSref (ret));
3342 DPRINTF (("==> %s", sRef_unparseFull (s)));
28bf4b0b 3343 }
3344 else
3345 {
3346 s = sRef_fixBaseParam (sel, args);
28bf4b0b 3347 }
ccf0a4a8 3348
3349 DPRINTF (("elements: %s", sRef_unparse (s)));
3350 DPRINTF (("elements: %s", sRef_unparseFull (s)));
3351
3352 DPRINTF (("Reflecting state clause on: %s / %s",
1d239d69 3353 sRef_unparseFull (sel), sRef_unparseFull (s)));
ccf0a4a8 3354
1d239d69 3355 /* evans 2001-08-24 - added aliasSetCompleteParam */
3356 sRef_aliasSetCompleteParam (modf, s, eparam, exprNode_loc (f));
3357
3358 DPRINTF (("After reflecting state clause on: %s / %s",
3359 sRef_unparseFull (sel), sRef_unparseFull (s)));
28bf4b0b 3360 } end_sRefSet_elements;
3361 }
3362 }
ba45e1e4 3363 } end_stateClauseList_elements ;
3364 }
3365
3366 DPRINTF (("Here: %s / %s",
3367 uentry_unparseFull (le),
3368 bool_unparse (uentry_hasMetaStateEnsures (le))));
3369
3370 if (uentry_hasMetaStateEnsures (le))
3371 {
6970c11b 3372 fileloc loc = exprNode_loc (f);
3373
ccf0a4a8 3374 metaStateConstraintList mscl = uentry_getMetaStateEnsures (le);
3120b462 3375
ccf0a4a8 3376 metaStateConstraintList_elements (mscl, msc)
3120b462 3377 {
ccf0a4a8 3378 metaStateSpecifier msspec = metaStateConstraint_getSpecifier (msc);
3379 metaStateInfo msinfo = metaStateSpecifier_getMetaStateInfo (msspec);
3380 metaStateExpression msexpr = metaStateConstraint_getExpression (msc);
6970c11b 3381 cstring key = metaStateInfo_getName (msinfo);
ccf0a4a8 3382 sRef mlsr = metaStateSpecifier_getSref (msspec);
3383 sRef s;
3384 sRef lastref = sRef_undefined;
3385 stateValue sval = stateValue_undefined;
3386
3387 DPRINTF (("Meta state constraint for %s: %s", uentry_unparse (le),
3388 metaStateConstraint_unparse (msc)));
3389 DPRINTF (("Matches left: %s", sRef_unparseDebug (mlsr)));
3390
3391 if (sRef_isResult (sRef_getRootBase (mlsr)))
12f2ffe9 3392 {
ccf0a4a8 3393 s = exprNode_getSref (ret);
12f2ffe9 3394 }
3395 else
3396 {
ccf0a4a8 3397 s = sRef_fixBaseParam (mlsr, args);
12f2ffe9 3398 }
ccf0a4a8 3399
3400 DPRINTF (("Setting state: %s", sRef_unparseFull (s)));
3401
3402 while (metaStateExpression_isDefined (msexpr))
12f2ffe9 3403 {
ccf0a4a8 3404 metaStateSpecifier ms = metaStateExpression_getSpecifier (msexpr);
ccf0a4a8 3405 metaStateInfo msi = metaStateSpecifier_getMetaStateInfo (ms);
6970c11b 3406 sRef msr, fs;
3407
ccf0a4a8 3408 DPRINTF (("Check expression: %s", metaStateExpression_unparse (msexpr)));
3409
3410 if (metaStateExpression_isMerge (msexpr))
3411 {
3412 msexpr = metaStateExpression_getRest (msexpr);
3413 }
3414 else
3415 {
3416 msexpr = metaStateExpression_undefined;
3417 }
3418
3419 if (metaStateInfo_isDefined (msi))
3420 {
3421 /* Must match lhs state */
3422 llassert (metaStateInfo_equal (msinfo, msi));
3423 }
3424
6970c11b 3425 if (metaStateSpecifier_isElipsis (ms))
12f2ffe9 3426 {
6970c11b 3427 /*
3428 ** For elipsis, we need to merge all the relevant elipsis parameters
3429 **
3430 */
12f2ffe9 3431
6970c11b 3432 uentryList params = uentry_getParams (le);
3433 int paramno = uentryList_size (params) - 1;
3434
3435 if (!uentry_isElipsisMarker (uentryList_getN (params, paramno)))
12f2ffe9 3436 {
6970c11b 3437 voptgenerror
3438 (FLG_TYPE,
3439 message ("Ensures clauses uses ... for function without ... in parameter list: %q",
3440 uentry_getName (le)),
3441 uentry_whereLast (le));
3442 /*@innerbreak@*/ break;
3443 }
3444
3445 while (paramno < exprNodeList_size (args))
3446 {
3447 exprNode arg = exprNodeList_getN (args, paramno);
3448 fs = exprNode_getSref (arg);
3449 DPRINTF (("Merge arg: %s", exprNode_unparse (arg)));
3450
3451 /* cut and pasted... gack*/
3452 if (stateValue_isDefined (sval))
ccf0a4a8 3453 {
6970c11b 3454 /* Use combination table to merge old state value with new one: */
3455 stateValue tval = sRef_getMetaStateValue (fs, key);
ccf0a4a8 3456
6970c11b 3457 if (stateValue_isDefined (tval))
3458 {
3459 stateCombinationTable sctable = metaStateInfo_getMergeTable (msinfo);
3460 cstring msg = cstring_undefined;
3461 int nval = stateCombinationTable_lookup (sctable,
3462 stateValue_getValue (sval),
3463 stateValue_getValue (tval),
3464 &msg);
3465 DPRINTF (("Combining: %s + %s -> %d",
3466 stateValue_unparseValue (sval, msinfo),
3467 stateValue_unparseValue (tval, msinfo),
3468 nval));
3469
3470 if (nval == stateValue_error)
3471 {
6970c11b 3472 if (optgenerror
3473 (FLG_STATEMERGE,
3474 message
3475 ("Attributes merged in ensures clause in states that "
b7e84605 3476 "cannot be combined (%q is %q, %q is %q)%q",
6970c11b 3477 sRef_unparse (lastref),
3478 stateValue_unparseValue (sval, msinfo),
3479 sRef_unparse (fs),
3480 stateValue_unparseValue (tval, msinfo),
b7e84605 3481 cstring_isDefined (msg) ?
3482 message (": %s", msg) : cstring_undefined),
6970c11b 3483 exprNode_loc (f)))
3484 {
3485 sRef_showMetaStateInfo (fs, key);
3486 }
3487 }
3488
3489 stateValue_updateValueLoc (sval, nval, fileloc_undefined);
3490 loc = exprNode_loc (arg);
3491 }
3492 else
ccf0a4a8 3493 {
6970c11b 3494 DPRINTF (("No value for: %s:%s", sRef_unparse (fs), key));
3495 }
3496 }
3497 else
3498 {
3499 sval = sRef_getMetaStateValue (fs, key);
ccf0a4a8 3500 }
3501
6970c11b 3502 lastref = fs;
3503
3504 if (stateValue_isError (sval))
3505 {
3506 /*@innerbreak@*/ break; /* Don't merge any more values if here was an error */
3507 }
3508
3509
3510 paramno++;
ccf0a4a8 3511 }
3512 }
3513 else
3514 {
6970c11b 3515 msr = metaStateSpecifier_getSref (ms);
ccf0a4a8 3516
6970c11b 3517
3518 llassert (sRef_isParam (sRef_getRootBase (msr)));
3519 fs = sRef_fixBaseParam (msr, args);
3520
3521 if (stateValue_isDefined (sval))
3522 {
3523 /* Use combination table to merge old state value with new one: */
3524 stateValue tval = sRef_getMetaStateValue (fs, key);
3525
3526 if (stateValue_isDefined (tval))
3527 {
3528 stateCombinationTable sctable = metaStateInfo_getMergeTable (msinfo);
3529 cstring msg = cstring_undefined;
3530 int nval = stateCombinationTable_lookup (sctable,
3531 stateValue_getValue (sval),
3532 stateValue_getValue (tval),
3533 &msg);
3534 DPRINTF (("Combining: %s + %s -> %d",
3535 stateValue_unparseValue (sval, msinfo),
3536 stateValue_unparseValue (tval, msinfo),
3537 nval));
3538
3539 if (nval == stateValue_error)
3540 {
6970c11b 3541 if (optgenerror
3542 (FLG_STATEMERGE,
3543 message
3544 ("Attributes merged in ensures clause in states that "
b7e84605 3545 "cannot be combined (%q is %q, %q is %q)%q",
6970c11b 3546 sRef_unparse (lastref),
3547 stateValue_unparseValue (sval, msinfo),
3548 sRef_unparse (fs),
3549 stateValue_unparseValue (tval, msinfo),
b7e84605 3550 cstring_isDefined (msg)
3551 ? message (": %s", msg) : cstring_undefined),
6970c11b 3552 exprNode_loc (f)))
3553 {
3554 sRef_showMetaStateInfo (fs, key);
3555 }
3556 }
3557
3558 stateValue_updateValueLoc (sval, nval, fileloc_undefined);
3559 }
3560 else
3561 {
3562 DPRINTF (("No value for: %s:%s", sRef_unparse (fs), key));
3563 }
3564 }
3565 else
3566 {
3567 sval = sRef_getMetaStateValue (fs, key);
3568 }
3569
3570 lastref = fs;
3571
3572 if (stateValue_isError (sval))
3573 {
3574 /*@innerbreak@*/ break; /* Don't merge any more values if here was an error */
3575 }
12f2ffe9 3576 }
12f2ffe9 3577 }
6970c11b 3578
ccf0a4a8 3579 DPRINTF (("Setting: %s:%s <- %s", sRef_unparse (s), key, stateValue_unparse (sval)));
3580
3581 if (stateValue_isDefined (sval))
12f2ffe9 3582 {
6970c11b 3583 sRef_setMetaStateValueComplete (s, key, stateValue_getValue (sval), loc);
12f2ffe9 3584 }
ccf0a4a8 3585 else
12f2ffe9 3586 {
ccf0a4a8 3587 DPRINTF (("Undefined state: %s", cstring_toCharsSafe (sRef_unparse (s))));
12f2ffe9 3588 }
ccf0a4a8 3589 } end_metaStateConstraintList_elements ;
ba45e1e4 3590
ccf0a4a8 3591 metaStateConstraintList_free (mscl);
28bf4b0b 3592 }
3593 }
3594}
3595
3596static void
3597checkRequiresClause (uentry le, exprNode f, exprNodeList args)
3598{
3599 DPRINTF (("Check requires clause: %s(%s) / %s / %s",
3600 exprNode_unparse (f), exprNodeList_unparse (args),
3601 uentry_unparseFull (le),
3602 stateClauseList_unparse (uentry_getStateClauseList (le))));
3603
3604 if (uentry_isValid (le) && uentry_isFunction (le))
3605 {
3606 stateClauseList sclauses = uentry_getStateClauseList (le);
3607
3608 if (stateClauseList_isDefined (sclauses))
3609 {
3610 DPRINTF (("Check requires: %s / %s / %s",
3611 uentry_unparse (le),
3612 exprNode_unparse (f), exprNodeList_unparse (args)));
3613
3614 stateClauseList_elements (sclauses, cl)
3615 {
3616 DPRINTF (("Check clause: %s / %s",
3617 stateClause_unparse (cl),
3618 bool_unparse (stateClause_hasRequires (cl))));
3619
3620 if (stateClause_hasRequires (cl))
3621 {
3622 sRefSet osrs = sRefSet_undefined;
3623 sRefSet srs;
3624
3625 if (stateClause_isGlobal (cl))
3626 {
3627 srs = sRefSet_single (usymtab_lookupGlobalMarker ());
3628 osrs = srs;
3629 }
3630 else
3631 {
3632 srs = stateClause_getRefs (cl);
3633 }
3634
3635 DPRINTF (("Refs: %s", sRefSet_unparse (srs)));
3636
3637 if (stateClause_setsMetaState (cl))
3638 {
3639 qual q = stateClause_getMetaQual (cl);
3640 annotationInfo ainfo = qual_getAnnotationInfo (q);
3641 metaStateInfo minfo = annotationInfo_getState (ainfo);
3642 cstring key = metaStateInfo_getName (minfo);
3643 int mvalue = annotationInfo_getValue (ainfo);
3644
3645 DPRINTF (("Requires meta state! %s = %d", key, mvalue));
3646
3647 sRefSet_elements (srs, sel)
3648 {
3649 sRef s = sRef_fixBaseParam (sel, args);
3650
3651 if (sRef_isResult (sRef_getRootBase (sel)))
3652 {
ccf0a4a8 3653 BADBRANCH;
28bf4b0b 3654 }
3655 else
3656 {
3657 DPRINTF (("Checking state clause on: %s / %s / %s = %d",
3658 sRef_unparseFull (sel), sRef_unparseFull (s),
3659 key, mvalue));
3660
3661 if (!sRef_checkMetaStateValue (s, key, mvalue))
3662 {
3663 DPRINTF (("HERE: %s", sRef_unparse (s)));
3664 if (optgenerror
3665 (FLG_STATETRANSFER,
3666 message
990ec868 3667 ("Requires clause of called function %q not satisfied%q (state is %q): %q",
28bf4b0b 3668 uentry_getName (le),
3669 sRef_isGlobalMarker (s)
3670 ? message ("")
3671 : message (" by %q", sRef_unparse (s)),
3672 stateValue_unparseValue (sRef_getMetaStateValue (s, key),
3673 minfo),
3674 stateClause_unparse (cl)),
3675 exprNode_loc (f)))
3676 {
3677 sRef_showAliasInfo (s);
3678 }
3679 else
3680 {
3681 DPRINTF (("Error supressed!"));
3682 DPRINTF (("Loc: %s", fileloc_unparse (exprNode_loc (f))));
3683 DPRINTF (("Context supress: %s",
3684 bool_unparse (context_suppressFlagMsg (FLG_STATETRANSFER, exprNode_loc (f)))));
3685 }
3686 }
3687 }
3688 } end_sRefSet_elements;
3689 }
3690 else
3691 {
3692 sRefModVal modf = stateClause_getRequiresBodyFunction (cl);
3693 int eparam = stateClause_getStateParameter (cl);
3694
3695 DPRINTF (("Reflect after clause: %s / %s",
3696 stateClause_unparse (cl),
3697 sRefSet_unparse (srs)));
3698
abd7f895 3699 llassert (modf != NULL);
3700
28bf4b0b 3701 sRefSet_elements (srs, sel)
3702 {
3703 sRef s;
3704
3705 DPRINTF (("elements: %s", sRef_unparse (sel)));
3706 DPRINTF (("elements: %s", sRef_unparseFull (sel)));
3707
3708 s = sRef_fixBaseParam (sel, args);
3709
3710 DPRINTF (("elements: %s", sRef_unparse (s)));
3711 DPRINTF (("elements: %s", sRef_unparseFull (s)));
3712
3713 if (sRef_isResult (sRef_getRootBase (sel)))
3714 {
b73d1009 3715 ; /* what do we do about results? */
28bf4b0b 3716 }
3717 else
3718 {
3719 DPRINTF (("Reflecting state clause on: %s / %s",
3720 sRef_unparse (sel), sRef_unparse (s)));
3721
3722 modf (s, eparam, exprNode_loc (f));
3723 }
3724 } end_sRefSet_elements;
3725 }
3726
3727 sRefSet_free (osrs);
3728 }
3729 } end_stateClauseList_elements ;
3730 }
3731 }
3732}
3733
616915dd 3734static /*@only@*/ exprNode
3735functionCallSafe (/*@only@*/ /*@notnull@*/ exprNode f,
3736 ctype t, /*@keep@*/ exprNodeList args)
3737{
3738 /* requires f is a non-error exprNode, with type function */
3739 cstring fname = exprNode_unparse (f);
3740 uentry le = exprNode_getUentry (f);
3741 exprNode ret = exprNode_createPartialCopy (f);
3742 int special;
3743
3744 setCodePoint ();
28bf4b0b 3745
3746 DPRINTF (("Call: %s %s",exprNode_unparse (f), exprNodeList_unparse (args)));
3747
3748 ret->typ = ctype_getReturnType (t);
616915dd 3749 ret->kind = XPR_CALL;
3750
3751 ret->edata = exprData_makeCall (f, args);
3752
3753 /*
3754 ** Order of these steps is very important!
3755 **
3756 ** Must check for argument dependencies before messing up uses and sets.
3757 */
3758
3759 if (context_getFlag (FLG_EVALORDER))
3760 {
3761 exprNodeList_elements (args, current)
3762 {
3763 if (exprNode_isDefined (current))
3764 {
3765 exprNode_addUse (current, current->sref);
3766 }
3767 } end_exprNodeList_elements;
3768
3769 if (context_maybeSet (FLG_EVALORDER) || context_maybeSet (FLG_EVALORDERUNCON))
3770 {
3771 checkSequencing (f, args);
3772 }
3773
3774 exprNodeList_elements (args, current)
3775 {
3776 if (exprNode_isDefined (current) && sRef_isMeaningful (current->sref))
3777 {
3778 exprNode_addUse (ret, sRef_makeDerived (current->sref));
3779 }
3780 } end_exprNodeList_elements ;
3781 }
3782
3783 special = checkArgs (le, f, t, args, ret);
3784 checkGlobMods (f, le, args, ret, special);
28bf4b0b 3785 checkRequiresClause (le, f, args);
3786 setCodePoint ();
616915dd 3787
616915dd 3788 if (uentry_isValid (le)
3789 && (uentry_isFunction (le)
3790 || (uentry_isVariable (le)
3791 && ctype_isFunction (uentry_getType (le)))))
3792 {
3793 exitkind exk = uentry_getExitCode (le);
3794
3795 /* f->typ is already set to the return type */
3796
ccf0a4a8 3797 DPRINTF (("Function: %s", uentry_unparseFull (le)));
6fcd0b1e 3798 ret->sref = uentry_returnedRef (le, args, exprNode_loc (f));
28bf4b0b 3799 DPRINTF (("Returned: %s / %s",
3800 uentry_unparseFull (le),
3801 sRef_unparseFull (ret->sref)));
ccf0a4a8 3802
616915dd 3803 if (uentry_isFunction (le) && exprNodeList_size (args) >= 1)
3804 {
3805 qual nullPred = uentry_nullPred (le);
3806
3807 if (qual_isTrueNull (nullPred))
3808 {
3809 exprNode arg = exprNodeList_head (args);
3810
3811 if (exprNode_isDefined (arg))
3812 {
3813 ret->guards = guardSet_addFalseGuard (ret->guards, arg->sref);
3814 }
3815 }
3816 else if (qual_isFalseNull (nullPred))
3817 {
3818 exprNode arg = exprNodeList_head (args);
3819
3820 if (exprNode_isDefined (arg))
3821 {
3822 ret->guards = guardSet_addTrueGuard (ret->guards, arg->sref);
3823 }
3824 }
3825 else
3826 {
3827 llassert (qual_isUnknown (nullPred));
3828 }
3829 }
3830
3831 if (exitkind_isConditionalExit (exk))
3832 {
3833 /*
3834 ** True exit is:
3835 ** if (arg0) then { exit! } else { ; }
3836 ** False exit is:
3837 ** if (arg0) then { ; } else { exit! }
3838 */
3839
3840 exprNode firstArg;
3841
3842 llassert (!exprNodeList_isEmpty (args));
3843 firstArg = exprNodeList_head (args);
3844
3845 if (exprNode_isDefined (firstArg)
3846 && !guardSet_isEmpty (firstArg->guards))
3847 {
3848 usymtab_trueBranch (guardSet_undefined);
3849 usymtab_altBranch (guardSet_undefined);
3850
3851 if (exitkind_isTrueExit (exk))
3852 {
3853 usymtab_popBranches (firstArg,
3854 exprNode_makeMustExit (),
3855 exprNode_undefined,
3856 TRUE, TRUEEXITCLAUSE);
3857 }
3858 else
3859 {
3860 usymtab_popBranches (firstArg,
3861 exprNode_undefined,
3862 exprNode_makeMustExit (),
3863 TRUE, FALSEEXITCLAUSE);
3864 }
3865 }
3866
3867 ret->exitCode = XK_MAYEXIT;
3868 }
3869 else if (exitkind_mustExit (exk))
3870 {
3871 ret->exitCode = XK_MUSTEXIT;
3872 }
3873 else if (exitkind_couldExit (exk))
3874 {
3875 ret->exitCode = XK_MAYEXIT;
3876 }
3877 else
3878 {
3879 ;
3880 }
3881
3882 if (cstring_equalLit (fname, "exit"))
3883 {
3884 if (exprNodeList_size (args) == 1)
3885 {
3886 exprNode arg = exprNodeList_head (args);
3887
3888 if (exprNode_isDefined (arg) && exprNode_knownIntValue (arg))
3889 {
3890 long int val = multiVal_forceInt (exprNode_getValue (arg));
3891
3892 if (val != 0)
3893 {
3894 voptgenerror
3895 (FLG_EXITARG,
3896 message
3897 ("Argument to exit has implementation defined behavior: %s",
3898 exprNode_unparse (arg)),
3899 exprNode_loc (arg));
3900 }
3901 }
3902 }
3903 }
3904 }
3905 else
3906 {
02b84d4b 3907 ret->sref = sRef_undefined;
616915dd 3908 exprNode_checkSetAny (ret, uentry_rawName (le));
3909 }
3910
ccf0a4a8 3911 DPRINTF (("Before reflect: %s", sRef_unparseFull (ret->sref)));
3912 DPRINTF (("Reflect: %s", uentry_unparseFull (le)));
3913 reflectEnsuresClause (ret, le, f, args);
3914 setCodePoint ();
3915
6fcd0b1e 3916 DPRINTF (("Here: %s", sRef_unparseFull (ret->sref)));
616915dd 3917 return (ret);
3918}
3919
3920/*
3921** this is yucky! should keep the uentry as part of exprNode!
3922*/
3923
e83c79ec 3924uentry exprNode_getUentry (exprNode e)
616915dd 3925{
3926 if (exprNode_isError (e))
3927 {
3928 return uentry_undefined;
3929 }
3930 else
3931 {
3932 cstring s = exprNode_rootVarName (e);
3933 uentry ue = usymtab_lookupSafe (s);
3934
3935 return ue;
3936 }
3937}
3938
3e3ec469 3939/*
3940** Returns true iff e1 and e2 are both exactly the same storage
3941** (conservative).
3942*/
3943
3944static bool exprNode_sameStorage (exprNode e1, exprNode e2)
3945{
3946 sRef s1 = exprNode_getSref (e1);
3947 sRef s2 = exprNode_getSref (e2);
3948
3949 return (sRef_realSame (s1, s2));
3950}
3951
616915dd 3952exprNode
3953exprNode_makeInitBlock (lltok brace, /*@only@*/ exprNodeList inits)
3954{
3955 exprNode ret = exprNode_createPlain (ctype_unknown);
3956
3957 ret->kind = XPR_INITBLOCK;
3958 ret->edata = exprData_makeCall (exprNode_undefined, inits);
3959 ret->loc = fileloc_update (ret->loc, lltok_getLoc (brace));
3960
3961 return (ret);
3962}
3963
3964exprNode
3965exprNode_functionCall (/*@only@*/ exprNode f, /*@only@*/ exprNodeList args)
3966{
3967 ctype t;
3968
6483a926 3969# ifdef DEBUGSPLINT
3970 usymtab_checkAllValid ();
3971# endif
616915dd 3972
3973 if (exprNode_isUndefined (f))
3974 {
3975 exprNode_free (f);
3976 exprNodeList_free (args);
3977 return exprNode_undefined;
3978 }
3979
3980 t = exprNode_getType (f);
3981
3982 if (sRef_isLocalVar (f->sref))
3983 {
3984 exprNode_checkUse (f, f->sref, f->loc);
3985
3986 if (sRef_possiblyNull (f->sref))
3987 {
3988 if (!usymtab_isGuarded (f->sref))
3989 {
3990 if (optgenerror (FLG_NULLDEREF,
3991 message ("Function call using %s pointer %q",
3992 sRef_nullMessage (f->sref),
3993 sRef_unparse (f->sref)),
3994 f->loc))
3995 {
3996 sRef_showNullInfo (f->sref);
3997 sRef_setNullError (f->sref);
3998 }
3999 }
4000 }
4001 }
4002
4003 setCodePoint ();
4004
4005 if (ctype_isRealFunction (t))
4006 {
4007 exprNode ret = functionCallSafe (f, t, args);
4008 setCodePoint ();
4009 return ret;
4010 }
4011 else if (ctype_isUnknown (t))
4012 {
4013 exprNode ret = exprNode_createPartialCopy (f);
4014 cstring tstring;
4015
4016 setCodePoint ();
4017
4018 ret->typ = t;
4019 exprNodeList_elements (args, current)
4020 {
4021 if (exprNode_isDefined (current))
4022 {
4023 exprNode_checkUse (ret, current->sref, ret->loc);
4024
4025 /*
4026 ** also, anything derivable from current->sref may be used
4027 */
4028
4029 exprNode_addUse (ret, sRef_makeDerived (current->sref));
4030 exprNode_mergeUSs (ret, current);
4031 }
4032 } end_exprNodeList_elements;
4033
4034 ret->edata = exprData_makeCall (f, args);
4035 ret->kind = XPR_CALL;
4036
4037 tstring = cstring_copy (exprNode_unparse (f));
4038
4039 cstring_markOwned (tstring);
4040 exprNode_checkSetAny (ret, tstring);
4041
4042 return (ret);
4043 }
4044 else
4045 {
4046 voptgenerror (FLG_TYPE,
4047 message ("Call to non-function (type %t): %s", t,
4048 exprNode_unparse (f)),
4049 f->loc);
4050 exprNode_free (f);
4051 exprNodeList_free (args);
4052
4053 return (exprNode_makeError ());
4054 }
4055}
4056
28bf4b0b 4057static exprNode
4058exprNode_fieldAccessAux (/*@only@*/ exprNode s, /*@observer@*/ fileloc loc,
4059 /*@only@*/ cstring f)
616915dd 4060{
4061 exprNode ret = exprNode_createPartialCopy (s);
4062
4063 ret->kind = XPR_FACCESS;
4064
4065 if (exprNode_isError (s))
4066 {
4067 ret->edata = exprData_makeField (s, f);
4068 return ret;
4069 }
4070 else
4071 {
4072 ctype t = exprNode_getType (s);
4073 ctype tr = ctype_realType (t);
28bf4b0b 4074
616915dd 4075 checkMacroParen (s);
4076
4077 ret->edata = exprData_makeField (s, f);
28bf4b0b 4078
616915dd 4079 if (ctype_isStructorUnion (tr))
4080 {
4081 uentry tf = uentryList_lookupField (ctype_getFields (tr), f);
4082
4083 if (uentry_isUndefined (tf))
4084 {
4085 voptgenerror (FLG_TYPE,
4086 message ("Access non-existent field %s of %t: %s", f, t,
4087 exprNode_unparse (ret)),
28bf4b0b 4088 loc);
4089 /*! cstring_free (f); */ /* evans 2001-03-25 self-detect */
616915dd 4090 return (ret);
4091 }
4092 else
4093 {
4094 uentry_setUsed (tf, exprNode_loc (ret));
4095
4096 ret->typ = uentry_getType (tf);
4097 checkSafeUse (ret, s->sref);
4098
4099 ret->sref = sRef_makeField (s->sref, uentry_rawName (tf));
28bf4b0b 4100 /*!? exprNode_free (s); */ /* evans 2001-03-25 self-detect */
616915dd 4101 return (ret);
4102 }
4103 }
4104 else /* isStructorUnion */
4105 {
4106 if (ctype_isRealAbstract (tr))
4107 {
4108 voptgenerror
4109 (FLG_ABSTRACT,
4110 message ("Access field of abstract type (%t): %s.%s",
4111 t, exprNode_unparse (s), f),
28bf4b0b 4112 loc);
616915dd 4113 ret->typ = ctype_unknown;
4114 }
4115 else
4116 {
4117 if (ctype_isKnown (tr))
4118 {
4119 voptgenerror
4120 (FLG_TYPE,
4121 message
4122 ("Access field of non-struct or union (%t): %s.%s",
4123 t, exprNode_unparse (s), f),
28bf4b0b 4124 loc);
616915dd 4125
4126 ret->typ = ctype_unknown;
4127 }
4128 else
4129 {
4130 cstring sn = cstring_copy (f);
28bf4b0b 4131
616915dd 4132 checkSafeUse (ret, s->sref);
4133 cstring_markOwned (sn);
4134 ret->sref = sRef_makeField (s->sref, sn);
616915dd 4135 return (ret);
4136 }
4137 }
28bf4b0b 4138
616915dd 4139 return (ret);
4140 }
4141 }
4142 BADEXIT;
4143}
4144
28bf4b0b 4145exprNode
4146exprNode_fieldAccess (/*@only@*/ exprNode s, /*@only@*/ lltok dot,
4147 /*@only@*/ cstring f)
4148{
4149 exprNode res = exprNode_fieldAccessAux (s, lltok_getLoc (dot), f);
80489f0a 4150 lltok_free (dot);
28bf4b0b 4151 return res;
4152}
4153
616915dd 4154exprNode
4155exprNode_addParens (/*@only@*/ lltok lpar, /*@only@*/ exprNode e)
4156{
4157 exprNode ret = exprNode_createPartialCopy (e);
4158
4159 ret->loc = fileloc_update (ret->loc, lltok_getLoc (lpar));
4160 ret->kind = XPR_PARENS;
4161 ret->edata = exprData_makeUop (e, lpar);
4162
4163 if (!exprNode_isError (e))
4164 {
4165 ret->exitCode = e->exitCode;
4166 ret->canBreak = e->canBreak;
4167 ret->mustBreak = e->mustBreak;
4168 ret->isJumpPoint = e->isJumpPoint;
4169 ret->sref = e->sref;
4170 }
4171
4172 return ret;
4173}
4174
28bf4b0b 4175static exprNode
4176exprNode_arrowAccessAux (/*@only@*/ exprNode s, /*@observer@*/ fileloc loc,
4177 /*@only@*/ cstring f)
616915dd 4178{
4179 exprNode ret = exprNode_createPartialCopy (s);
4180
4181 ret->edata = exprData_makeField (s, f);
4182 ret->kind = XPR_ARROW;
28bf4b0b 4183
616915dd 4184 if (exprNode_isError (s))
4185 {
4186 return (ret);
4187 }
4188 else
4189 {
28bf4b0b 4190 ctype t = exprNode_getType (s);
4191 ctype tr = ctype_realType (t);
4192
4193 checkMacroParen (s);
4194
4195 (void) ctype_fixArrayPtr (tr); /* REWRITE THIS */
4196
4197 if (ctype_isRealPointer (tr))
4198 {
4199 ctype b = ctype_realType (ctype_baseArrayPtr (tr));
4200
4201 if (ctype_isStructorUnion (b))
4202 {
4203 uentry fentry = uentryList_lookupField (ctype_getFields (b), f);
4204
4205 if (sRef_isKnown (s->sref) && sRef_possiblyNull (s->sref))
4206 {
4207 if (!usymtab_isGuarded (s->sref) && !context_inProtectVars ())
4208 {
4209 if (optgenerror
4210 (FLG_NULLDEREF,
4211 message ("Arrow access from %s pointer%q: %s",
4212 sRef_nullMessage (s->sref),
4213 sRef_unparsePreOpt (s->sref),
4214 exprNode_unparse (ret)),
4215 loc))
4216 {
4217 sRef_showNullInfo (s->sref);
4218 sRef_setNullError (s->sref);
4219 }
4220 }
4221 }
4222
4223 if (uentry_isUndefined (fentry))
4224 {
4225 voptgenerror
4226 (FLG_TYPE,
4227 message ("Access non-existent field %s of %t: %s",
4228 f, t, exprNode_unparse (ret)),
4229 loc);
4230 ret->typ = ctype_unknown;
4231 return (ret);
4232 }
4233 else
4234 {
4235 /*
4236 ** was safeUse: shouldn't be safe!
4237 **
4238 ** to do rec->field
4239 ** rec must be defined,
4240 ** *rec must be allocated
4241 ** rec->field need only be defined it if is an rvalue
4242 */
4243
4244 uentry_setUsed (fentry, exprNode_loc (ret));
4245 ret->typ = uentry_getType (fentry);
4246
4247 exprNode_checkUse (ret, s->sref, s->loc);
4248
4249 /* exprNode_checkUse (ret, sRef_makePointer (s->sref), s->loc); */
4250 ret->sref = sRef_makeArrow (s->sref, uentry_rawName (fentry));
4251 return (ret);
4252 }
4253 }
4254 else /* Pointer to something that is not a struct or union*/
4255 {
4256 if (ctype_isRealAbstract (tr))
4257 {
4258 ctype xrt = ctype_forceRealType (tr);
4259
4260 voptgenerror
4261 (FLG_ABSTRACT,
4262 message ("Arrow access field of abstract type (%t): %s->%s",
4263 t, exprNode_unparse (s), f),
4264 loc);
4265
4266 /*
4267 ** Set the state correctly, as if the abstraction is broken.
4268 */
4269
4270 if (ctype_isRealPointer (xrt) &&
4271 (b = ctype_realType (ctype_baseArrayPtr (xrt)),
4272 ctype_isStructorUnion (b)))
4273 {
4274 uentry fentry = uentryList_lookupField (ctype_getFields (b), f);
4275 ret->typ = uentry_getType (fentry);
4276 ret->sref = sRef_makeArrow (s->sref, uentry_rawName (fentry));
4277 }
4278 else
4279 {
4280 ret->typ = ctype_unknown;
4281 ret->sref = sRef_undefined;
4282 }
4283 }
4284 else /* not a struct, union or abstract */
4285 {
4286 if (ctype_isUnknown (tr)) {
4287 cstring sn = cstring_copy (f);
4288
4289 DPRINTF (("Here: %s", exprNode_unparse (s)));
4290
4291 exprNode_checkUse (ret, s->sref, s->loc);
4292 exprNode_checkUse (ret, sRef_makePointer (s->sref), s->loc);
4293
4294 cstring_markOwned (sn);
4295 ret->sref = sRef_makeArrow (s->sref, sn);
4296
4297 ret->kind = XPR_ARROW;
4298 return (ret);
4299 } else {
4300 voptgenerror
4301 (FLG_TYPE,
4302 message ("Arrow access field of non-struct or union "
4303 "pointer (%t): %s->%s",
4304 t, exprNode_unparse (s), f),
4305 loc);
4306
4307 ret->typ = ctype_unknown;
4308 ret->sref = sRef_undefined;
4309 }
4310 }
4311 }
4312 }
4313 else /* its not a pointer */
4314 {
4315 if (!ctype_isUnknown (tr))
4316 {
4317 voptgenerror
4318 (FLG_TYPE,
4319 message ("Arrow access of non-pointer (%t): %s->%s",
4320 t, exprNode_unparse (s), f),
4321 loc);
4322
4323 ret->typ = ctype_unknown;
4324 ret->sref = sRef_undefined;
4325 }
4326 else
4327 {
4328 cstring sn = cstring_copy (f);
4329
4330 DPRINTF (("Here: %s", exprNode_unparse (s)));
4331
4332 exprNode_checkUse (ret, s->sref, s->loc);
4333 exprNode_checkUse (ret, sRef_makePointer (s->sref), s->loc);
4334
4335 cstring_markOwned (sn);
4336 ret->sref = sRef_makeArrow (s->sref, sn);
4337
4338 ret->kind = XPR_ARROW;
4339 return (ret);
4340 }
4341 }
4342
616915dd 4343 return (ret);
4344 }
4345 BADEXIT;
4346}
4347
28bf4b0b 4348exprNode
4349exprNode_arrowAccess (/*@only@*/ exprNode s,
4350 /*@only@*/ lltok arrow,
4351 /*@only@*/ cstring f)
4352{
4353 exprNode res = exprNode_arrowAccessAux (s, lltok_getLoc (arrow), f);
80489f0a 4354 lltok_free (arrow);
28bf4b0b 4355 return res;
4356}
4357
616915dd 4358/*
4359** only postOp's in C: i++ and i--
4360*/
4361
4362exprNode
4363exprNode_postOp (/*@only@*/ exprNode e, /*@only@*/ lltok op)
4364{
4365 /* check modification also */
4366 /* cstring opname = lltok_unparse (op);*/
4367 ctype t;
4368 exprNode ret = exprNode_createPartialCopy (e);
4369
4370 ret->loc = fileloc_update (ret->loc, lltok_getLoc (op));
4371 ret->kind = XPR_POSTOP;
4372 ret->edata = exprData_makeUop (e, op);
4373
4374 if (!exprNode_isDefined (e))
4375 {
4376 return ret;
4377 }
4378
4379 checkMacroParen (e);
4380
4381 exprNode_checkUse (ret, e->sref, e->loc);
4382 exprNode_checkSet (ret, e->sref);
4383
4384 t = exprNode_getType (e);
4385
4386 if (sRef_isUnsafe (e->sref))
4387 {
4388 voptgenerror (FLG_MACROPARAMS,
4389 message ("Operand of %s is macro parameter (non-functional): %s%s",
4390 lltok_unparse (op), exprNode_unparse (e), lltok_unparse (op)),
4391 e->loc);
4392 sRef_makeSafe (e->sref);
4393 sRef_makeSafe (ret->sref);
4394 }
4395
4396 if (ctype_isForceRealNumeric (&t) || ctype_isRealAP (t))
4397 {
4398 ret->typ = e->typ;
4399 }
4400 else
4401 {
4402 if (ctype_isRealAbstract (t))
4403 {
e5081f8c 4404 if (ctype_isRealNumAbstract (t)) {
4405 ; /* Allow operations on numabstract types */
4406 } else {
4407 voptgenerror
4408 (FLG_ABSTRACT,
4409 message ("Operand of %s is abstract type (%t): %s",
4410 lltok_unparse (op), t, exprNode_unparse (e)),
4411 e->loc);
4412 }
616915dd 4413 }
4414 else
4415 {
4416 voptgenerror
4417 (FLG_TYPE,
4418 message ("Operand of %s is non-numeric (%t): %s",
4419 lltok_unparse (op), t, exprNode_unparse (e)),
4420 e->loc);
4421 }
4422 ret->typ = ctype_unknown;
4423 }
4424
4425 /* if (ctype_isZero (t)) e->typ = ctype_int; */
4426
4427 exprNode_checkModify (e, ret);
4428
4429 /* added 7/11/2000 D.L */
84c9ffbf 4430
b7b694d6 4431 /* updateEnvironmentForPostOp (e); */
4432
4433 /* start modifications */
4434 /* added by Seejo on 4/16/2000 */
4435
4436 /* Arithmetic operations on pointers wil modify the size/len/null terminated
4437 status */
4438 if ((sRef_isPossiblyNullTerminated (e->sref)) || (sRef_isNullTerminated(e->sref))) {
4439
4440 ret->sref = sRef_copy (e->sref);
4441
4442 /* Operator : ++ */
4443 if (lltok_getTok (op) == INC_OP) {
4444 if (sRef_getSize(e->sref) > 0) {
4445
4446 sRef_setSize (ret->sref, sRef_getSize(e->sref) - 1);
4447
4448 if (sRef_getLen(e->sref) == 1) { /* i.e. the first character is \0 */
4449 /* Assumption: there is only 1 \0 in the buffer */
4450 /* This will not be correct if there are 2 \0's in the buffer */
4451 sRef_setNotNullTerminatedState(ret->sref);
4452 sRef_resetLen(ret->sref);
4453 } else {
4454 sRef_setNullTerminatedState(ret->sref);
4455 sRef_setLen (ret->sref, sRef_getLen(e->sref) - 1);
4456 }
4457 if (sRef_isNullTerminated (ret->sref))
4458 printf ("ret->sref is Null Terminated\n");
4459 else if (sRef_isPossiblyNullTerminated (ret->sref))
4460 printf ("ret->sref is Possibly Null Terminated\n");
4461 else if (sRef_isNotNullTerminated (ret->sref))
4462 printf ("ret->sref is Not Null Terminated\n");
b941db6b 4463 else
4464 {}
b7b694d6 4465 }
4466 }
4467
4468 /* Operator : -- */
4469 if (lltok_getTok (op) == DEC_OP) {
4470 if (sRef_getSize(e->sref) >= 0) {
4471 sRef_setSize (ret->sref, sRef_getSize(e->sref) + 1);
4472 sRef_setLen (ret->sref, sRef_getLen(e->sref) + 1);
4473 }
4474 }
4475 }
b7b694d6 4476 /* end modifications */
616915dd 4477
4478 return ret;
4479}
4480
4481exprNode
4482exprNode_preOp (/*@only@*/ exprNode e, /*@only@*/ lltok op)
4483{
4484 bool checkMod = FALSE;
4485 ctype te, tr;
4486 int opid = lltok_getTok (op);
4487 exprNode ret = exprNode_createSemiCopy (e);
4488
4489 exprNode_copySets (ret, e);
4490
4491 multiVal_free (ret->val);
4492 ret->val = multiVal_undefined;
4493 ret->loc = fileloc_update (ret->loc, lltok_getLoc (op));
4494 ret->kind = XPR_PREOP;
4495 ret->edata = exprData_makeUop (e, op);
4496
4497 if (exprNode_isError (e))
4498 {
4499 return ret;
4500 }
4501
4502 checkMacroParen (e);
4503
4504 te = exprNode_getType (e);
4505 tr = ctype_realType (te);
4506
4507 if (opid != TAMPERSAND)
4508 {
4509 exprNode_checkUse (ret, e->sref, e->loc);
4510
4511 if (ctype_isRealAbstract (tr)
4512 && (!(ctype_isRealBool (te) && (opid == TEXCL))))
4513 {
e5081f8c 4514 if (ctype_isRealNumAbstract (tr))
616915dd 4515 {
e5081f8c 4516 ; /* no warning for numabstract types */
4517 }
4518 else
4519 {
4520 if (optgenerror (FLG_ABSTRACT,
4521 message ("Operand of %s is abstract type (%t): %s",
4522 lltok_unparse (op), tr,
4523 exprNode_unparse (ret)),
4524 e->loc))
4525 {
4526 tr = te = ctype_unknown;
4527 ret->typ = ctype_unknown;
4528 sRef_setNullError (e->sref);
4529 }
616915dd 4530 }
4531 }
4532 }
4533
4534 switch (opid)
4535 {
4536 case INC_OP:
4537 case DEC_OP: /* should also check modification! */
616915dd 4538 if (sRef_isMacroParamRef (e->sref))
4539 {
4540 voptgenerror
4541 (FLG_MACROPARAMS,
4542 message ("Operand of %s is macro parameter (non-functional): %s",
4543 lltok_unparse (op), exprNode_unparse (ret)),
4544 e->loc);
4545 }
4546 else
4547 {
4548 exprNode_checkSet (ret, e->sref);
4549 }
4550
4551 if (ctype_isForceRealNumeric (&tr) || ctype_isRealAP (tr))
4552 {
4553 }
4554 else
4555 {
4556 if (context_msgStrictOps ())
4557 {
4558 voptgenerror
4559 (FLG_STRICTOPS,
4560 message ("Operand of %s is non-numeric (%t): %s",
4561 lltok_unparse (op), te, exprNode_unparse (ret)),
4562 e->loc);
4563 }
4564 ret->typ = ctype_int;
4565 }
4566
4567 /* start modifications */
4568 /* added by Seejo on 4/16/2000 */
4569
4570 /* Arithmetic operations on pointers wil modify the size/len/null terminated
4571 status */
e5081f8c 4572 if ((sRef_isPossiblyNullTerminated (e->sref))
4573 || (sRef_isNullTerminated(e->sref))) {
616915dd 4574 ret->sref = sRef_copy (e->sref);
4575
4576 /* Operator : ++ */
4577 if (lltok_getTok (op) == INC_OP) {
4578 if (sRef_getSize(e->sref) > 0) {
4579
4580 sRef_setSize (ret->sref, sRef_getSize(e->sref) - 1);
4581
4582 if (sRef_getLen(e->sref) == 1) { /* i.e. the first character is \0 */
4583 /* Assumption: there is only 1 \0 in the buffer */
4584 /* This will not be correct if there are 2 \0's in the buffer */
4585 sRef_setNotNullTerminatedState(ret->sref);
4586 sRef_resetLen (ret->sref);
4587 } else {
4588 sRef_setNullTerminatedState(ret->sref);
4589 sRef_setLen (ret->sref, sRef_getLen(e->sref) - 1);
4590 }
4591 }
4592 }
4593
4594 /* Operator : -- */
4595 if (lltok_getTok (op) == DEC_OP) {
4596 if (sRef_getSize(e->sref) >= 0) {
4597 sRef_setSize (ret->sref, sRef_getSize(e->sref) + 1);
4598 sRef_setLen (ret->sref, sRef_getLen(e->sref) + 1);
4599 }
4600 }
4601 }
4602
4603 /* end modifications */
4604
4605 checkMod = TRUE;
4606 break;
4607
4608 case TMINUS:
4609 case TPLUS:
4610 if (ctype_isForceRealNumeric (&tr))
4611 {
4612 if (opid == TMINUS)
4613 {
4614 ret->val = multiVal_invert (exprNode_getValue (e));
4615 }
4616 else
4617 {
4618 ret->val = multiVal_copy (exprNode_getValue (e));
4619 }
4620 }
4621 else
4622 {
4623 if (context_msgStrictOps ())
4624 {
4625 voptgenerror
4626 (FLG_STRICTOPS,
4627 message ("Operand of %s is non-numeric (%t): %s",
4628 lltok_unparse (op), te, exprNode_unparse (ret)),
4629 e->loc);
4630 }
4631
4632 ret->typ = ctype_int;
4633 }
4634 break;
4635
4636 case TEXCL: /* maybe this should be restricted */
4637 guardSet_flip (ret->guards);
4638
28bf4b0b 4639 if (ctype_isRealBool (te) || ctype_isUnknown (te))
616915dd 4640 {
4641 ;
4642 }
4643 else
4644 {
4645 if (ctype_isRealPointer (tr))
4646 {
4647 if (sRef_isKnown (e->sref))
4648 {
4649 ret->guards = guardSet_addFalseGuard (ret->guards, e->sref);
4650 }
28bf4b0b 4651
616915dd 4652 voptgenerror2n
4653 (FLG_BOOLOPS, FLG_PTRNEGATE,
4654 message ("Operand of %s is non-boolean (%t): %s",
4655 lltok_unparse (op), te, exprNode_unparse (ret)),
4656 e->loc);
4657 }
4658 else
4659 {
4660 voptgenerror
4661 (FLG_BOOLOPS,
4662 message ("Operand of %s is non-boolean (%t): %s",
4663 lltok_unparse (op), te, exprNode_unparse (ret)),
4664 e->loc);
4665 }
4666
4667 ret->typ = ctype_bool;
4668 }
4669 break;
4670
4671 case TTILDE:
4672 if (ctype_isForceRealInt (&tr))
4673 {
4674 }
4675 else
4676 {
4677 if (context_msgStrictOps ())
4678 {
4679 voptgenerror
4680 (FLG_STRICTOPS,
4681 message ("Operand of %s is non-integer (%t): %s",
4682 lltok_unparse (op), te, exprNode_unparse (ret)),
4683 e->loc);
4684 }
4685
4686 if (ctype_isInt (e->typ))
4687 {
4688 ret->typ = e->typ;
4689 }
4690 else
4691 {
4692 ret->typ = ctype_int;
4693 }
4694 }
4695 break;
4696
4697 case TAMPERSAND:
4698 ret->typ = ctype_makePointer (e->typ);
4699
4700 if (sRef_isKnown (e->sref))
4701 {
4702 ret->sref = sRef_makeAddress (e->sref);
4703 }
4704
4705 break;
4706
4707 case TMULT:
4708
4709 if (ctype_isAP (tr))
4710 {
4711 ret->typ = ctype_baseArrayPtr (e->typ);
4712 }
4713 else
4714 {
4715 if (ctype_isKnown (te))
4716 {
4717 if (ctype_isFunction (te))
4718 {
4719 ret->typ = e->typ;
4720
4721 voptgenerror
4722 (FLG_FCNDEREF,
4723 message ("Dereference of function type (%t): %s",
4724 te, exprNode_unparse (ret)),
4725 e->loc);
4726 }
4727 else
4728 {
4729 voptgenerror (FLG_TYPE,
4730 message ("Dereference of non-pointer (%t): %s",
4731 te, exprNode_unparse (ret)),
4732 e->loc);
4733 ret->typ = ctype_unknown;
4734 }
4735 }
4736 else
4737 {
4738 ret->typ = ctype_unknown;
4739 }
4740
4741 }
4742
4743 if (sRef_isKnown (e->sref))
4744 {
2209bcb7 4745 DPRINTF (("Checking possibly null: %s", sRef_unparseFull (e->sref)));
4746
616915dd 4747 if (sRef_possiblyNull (e->sref))
4748 {
2209bcb7 4749 DPRINTF (("Checking possibly null: %s", sRef_unparse (e->sref)));
616915dd 4750 if (!usymtab_isGuarded (e->sref) && !context_inProtectVars ())
4751 {
4752 if (optgenerror
4753 (FLG_NULLDEREF,
4754 message ("Dereference of %s pointer %q: %s",
4755 sRef_nullMessage (e->sref),
4756 sRef_unparse (e->sref),
4757 exprNode_unparse (ret)),
4758 e->loc))
4759 {
4760 sRef_showNullInfo (e->sref);
4761 sRef_setNotNull (e->sref, e->loc); /* suppress future messages */
4762 }
4763 }
4764 }
4765
4766 ret->sref = sRef_makePointer (e->sref);
4767 }
4768 break;
4769
4770 default:
4771 llbug (message ("exprNode_preOp: unhandled op: %s", lltok_unparse (op)));
4772 }
4773
4774 if (checkMod)
4775 {
4776 exprNode_checkModify (e, ret);
4777 }
4778
4779 return ret;
4780}
4781
4782/*
4783** any reason to disallow sizeof (abstract type) ?
4784*/
4785
4786/*
4787** used by both sizeof
4788*/
4789
4790static
4791ctype sizeof_resultType (void)
4792{
4793 static ctype sizet = ctype_unknown;
4794
4795 if (ctype_isUnknown (sizet))
4796 {
4797 if (usymtab_existsType (cstring_makeLiteralTemp ("size_t")))
4798 {
4799 sizet = uentry_getAbstractType (usymtab_lookup (cstring_makeLiteralTemp ("size_t")));
4800 }
4801 else
4802 {
e0b363ad 4803 sizet = ctype_ulint;
616915dd 4804 }
4805 }
4806 return sizet;
4807}
4808
4809exprNode
4810exprNode_sizeofType (/*@only@*/ qtype qt)
4811{
4812 exprNode ret = exprNode_create (sizeof_resultType ());
4813 ctype ct = qtype_getType (qt);
4814
4815 ret->kind = XPR_SIZEOFT;
4816 ret->edata = exprData_makeSizeofType (qt);
4817
4818 voptgenerror (FLG_SIZEOFTYPE,
4819 message ("Parameter to sizeof is type %s: %s",
4820 ctype_unparse (ct),
4821 exprNode_unparse (ret)),
4822 ret->loc);
4823
4824 return (ret);
4825}
4826
4827exprNode
4828exprNode_alignofType (/*@only@*/ qtype qt)
4829{
4830 exprNode ret = exprNode_create (sizeof_resultType ());
4831 ctype ct = qtype_getType (qt);
4832
4833 ret->kind = XPR_ALIGNOFT;
4834 ret->edata = exprData_makeSizeofType (qt);
4835
4836 voptgenerror (FLG_SIZEOFTYPE,
4837 message ("Parameter to alignof is type %s: %s",
4838 ctype_unparse (ct),
4839 exprNode_unparse (ret)),
4840 ret->loc);
4841
4842 return (ret);
4843}
4844
4845exprNode exprNode_offsetof (qtype qt, cstringList s)
4846{
4847 exprNode ret = exprNode_create (sizeof_resultType ());
4848 ctype ct = qtype_getType (qt);
4849
4850 ret->kind = XPR_OFFSETOF;
4851 ret->edata = exprData_makeOffsetof (qt, s);
4852
4853 if (!ctype_isRealSU (ct))
4854 {
4855 voptgenerror (FLG_TYPE,
4856 message ("First parameter to offsetof is not a "
4857 "struct or union type (type %s): %s",
4858 ctype_unparse (ct),
4859 exprNode_unparse (ret)),
4860 ret->loc);
4861 }
4862 else
4863 {
4864 ctype lt = ct;
4865
4866 cstringList_elements (s, el) {
4867 uentryList fields;
4868 uentry fld;
4869
4870 if (ctype_isUndefined (lt))
4871 {
4872 break;
4873 }
4874 else if (!ctype_isRealSU (lt))
4875 {
4876 voptgenerror (FLG_TYPE,
4877 message ("Inner offsetof type is not a "
4878 "struct or union type (type %s before field %s): %s",
4879 ctype_unparse (lt), el,
4880 exprNode_unparse (ret)),
4881 ret->loc);
4882 break;
4883 }
4884 else
4885 {
4886 fields = ctype_getFields (ctype_realType (lt));
4887 fld = uentryList_lookupField (fields, el);
4888 DPRINTF (("Try: %s / %s", ctype_unparse (lt), el));
4889
4890 if (uentry_isUndefined (fld))
4891 {
4892 if (ctype_equal (lt, ct)) {
4893 voptgenerror (FLG_TYPE,
4894 message ("Field %s in offsetof is not the "
4895 "name of a field of %s: %s",
4896 el,
4897 ctype_unparse (ct),
4898 exprNode_unparse (ret)),
4899 ret->loc);
4900 } else {
4901 voptgenerror (FLG_TYPE,
4902 message ("Deep field %s in offsetof is not the "
4903 "name of a field of %s: %s",
4904 el,
4905 ctype_unparse (lt),
4906 exprNode_unparse (ret)),
4907 ret->loc);
4908 }
4909 }
4910 else
4911 {
4912 lt = uentry_getType (fld);
4913 }
4914 }
4915 } end_cstringList_elements;
4916
4917 /* Should report error if its a bit field - behavior is undefined! */
4918 }
4919
4920 return (ret);
4921}
4922
4923/*@only@*/ exprNode
4924exprNode_sizeofExpr (/*@only@*/ exprNode e)
4925{
4926 exprNode ret;
4927
4928 if (exprNode_isUndefined (e))
4929 {
4930 ret = exprNode_createLoc (ctype_unknown, fileloc_copy (g_currentloc));
4931 ret->edata = exprData_makeSingle (e);
4932 ret->typ = sizeof_resultType ();
4933 ret->kind = XPR_SIZEOF;
4934 }
4935 else
4936 {
4937 uentry u = exprNode_getUentry (e);
4938
4939 ret = exprNode_createPartialCopy (e);
4940 ret->edata = exprData_makeSingle (e);
4941
4942 ret->typ = sizeof_resultType ();
4943 ret->kind = XPR_SIZEOF;
4944
4945 if (uentry_isValid (u)
4946 && uentry_isRefParam (u)
4947 && ctype_isRealArray (uentry_getType (u)))
4948 {
4949 voptgenerror
4950 (FLG_SIZEOFFORMALARRAY,
4951 message ("Parameter to sizeof is an array-type function parameter: %s",
4952 exprNode_unparse (ret)),
4953 ret->loc);
4954 }
4955 }
4956
4957 /*
4958 ** sizeof (x) doesn't "really" use x
4959 */
4960
4961 return (ret);
4962}
4963
4964/*@only@*/ exprNode
4965exprNode_alignofExpr (/*@only@*/ exprNode e)
4966{
4967 exprNode ret;
4968
4969 if (exprNode_isUndefined (e))
4970 {
4971 ret = exprNode_createLoc (ctype_unknown, fileloc_copy (g_currentloc));
4972 }
4973 else
4974 {
4975 ret = exprNode_createPartialCopy (e);
4976 }
4977
4978 ret->edata = exprData_makeSingle (e);
4979 ret->typ = sizeof_resultType ();
4980 ret->kind = XPR_ALIGNOF;
4981
4982 /*
4983 ** sizeof (x) doesn't "really" use x
4984 */
4985
4986 return (ret);
4987}
4988
4989/*@only@*/ exprNode
4990exprNode_cast (/*@only@*/ lltok tok, /*@only@*/ exprNode e, /*@only@*/ qtype q)
4991{
4992 ctype c;
4993 ctype t;
4994 exprNode ret;
4995
4996 if (exprNode_isError (e))
4997 {
4998 qtype_free (q);
80489f0a 4999 lltok_free (tok);
616915dd 5000 return exprNode_undefined;
5001 }
5002
5003 checkMacroParen (e);
5004
5005 c = qtype_getType (q);
5006 t = exprNode_getType (e);
5007
5008 ret = exprNode_createPartialCopy (e);
5009
5010 ret->loc = fileloc_update (ret->loc, lltok_getLoc (tok));
5011 ret->typ = c;
5012 ret->kind = XPR_CAST;
5013 ret->edata = exprData_makeCast (tok, e, q);
5014
02b84d4b 5015 ret->sref = sRef_copy (e->sref);
6fcd0b1e 5016
ae133592 5017 DPRINTF (("Cast: -> %s", sRef_unparseFull (ret->sref)));
5018
02b84d4b 5019 if (!sRef_isConst (e->sref))
616915dd 5020 {
616915dd 5021 usymtab_addForceMustAlias (ret->sref, e->sref);
616915dd 5022 }
02b84d4b 5023
6fcd0b1e 5024 DPRINTF (("Cast 2: -> %s", sRef_unparseFull (ret->sref)));
02b84d4b 5025 sRef_setTypeFull (ret->sref, c);
5026 DPRINTF (("Cast 2: -> %s", sRef_unparseFull (ret->sref)));
616915dd 5027
5028 /*
5029 ** we allow
5030 ** abstract -> void
5031 ** 0 <-> abstract *
5032 ** void * <-> abstract * (if FLG_ABSTVOIDP)
5033 ** abstract * <-> void * (if FLG_ABSTVOIDP)
5034 */
5035
5036 if (ctype_isVoid (c)) /* cast to void is always okay --- discard value */
5037 {
6fcd0b1e 5038 /* evans 2002-07-19: added this warning */
5039 DPRINTF (("Checking: %s / %s", exprNode_unparse (ret), sRef_unparseFull (ret->sref)));
5040 if (sRef_isFresh (ret->sref))
5041 {
5042 voptgenerror
5043 (FLG_MUSTFREEFRESH,
5044 message ("New fresh storage %q(type %s) cast to void (not released): %s",
5045 sRef_unparseOpt (ret->sref),
5046 ctype_unparse (exprNode_getType (ret)),
5047 exprNode_unparse (ret)),
5048 exprNode_loc (ret));
5049 }
616915dd 5050 }
5051 else if (ctype_isRealAP (c)) /* casting to array or pointer */
5052 {
5053 ctype bc = ctype_getBaseType (c);
5054 ctype bt = ctype_getBaseType (t);
5055 ctype rt = ctype_realType (t);
5056
5057 if (ctype_isFunction (ctype_baseArrayPtr (ctype_realType (c)))
5058 && (ctype_isArrayPtr (rt)
5059 && !ctype_isFunction (ctype_realType (ctype_baseArrayPtr (rt)))))
5060 {
5061 voptgenerror
5062 (FLG_CASTFCNPTR,
5063 message ("Cast from function pointer type (%t) to "
5064 "non-function pointer (%t): %s",
5065 c, t, exprNode_unparse (ret)),
5066 e->loc);
5067 }
5068
5069 if (!ctype_isFunction (ctype_baseArrayPtr (c))
5070 && (ctype_isArrayPtr (rt)
5071 && ctype_isFunction (ctype_realType (ctype_baseArrayPtr (rt)))))
5072 {
5073 voptgenerror
5074 (FLG_CASTFCNPTR,
5075 message ("Cast from non-function pointer type (%t) to "
5076 "function pointer (%t): %s",
5077 c, t, exprNode_unparse (ret)),
5078 e->loc);
5079 }
5080
5081 if (exprNode_isZero (e) && context_getFlag (FLG_ZEROPTR) &&
5082 !(ctype_isRealAbstract (bc)
5083 && context_hasAccess (ctype_typeId (bc))))
5084 {
5085 ; /* okay to cast zero */
5086 }
5087 else
5088 {
5089 if (ctype_isRealAbstract (bc)
5090 && !context_hasAccess (ctype_typeId (bc)))
5091 {
5092 if (ctype_isVoidPointer (t) || ctype_isUnknown (t))
5093 {
5094 vnoptgenerror
5095 (FLG_ABSTVOIDP,
5096 message ("Cast to underlying abstract type %t: %s",
5097 c, exprNode_unparse (ret)),
5098 e->loc);
5099 }
5100 else
5101 {
5102 voptgenerror
5103 (FLG_ABSTRACT,
5104 message ("Cast to underlying abstract type %t: %s",
5105 c, exprNode_unparse (ret)),
5106 e->loc);
5107 }
5108 }
5109
5110 if (ctype_isRealAbstract (bt)
5111 && !context_hasAccess (ctype_typeId (bt)))
5112 {
5113 if (ctype_isUnknown (c) || ctype_isVoidPointer (c))
5114 {
5115 vnoptgenerror
5116 (FLG_ABSTVOIDP,
5117 message ("Cast from underlying abstract type %t: %s",
5118 t, exprNode_unparse (ret)),
5119 e->loc);
5120 }
5121 else
5122 {
5123 voptgenerror
5124 (FLG_ABSTRACT,
5125 message ("Cast from underlying abstract type %t: %s",
5126 t, exprNode_unparse (ret)),
5127 e->loc);
5128 }
5129 }
5130 }
5131 }
5132 else
5133 {
5134 ctype bt = ctype_realType (ctype_getBaseType (t));
5135 ctype bc = ctype_realType (ctype_getBaseType (c));
5136
5137 if (ctype_isAbstract (bt) && !context_hasAccess (ctype_typeId (bt)))
5138 {
5139 if (ctype_match (c, t))
5140 {
5141 if (ctype_equal (c, t))
5142 {
5143 voptgenerror
5144 (FLG_TYPE,
5145 message ("Redundant cast involving abstract type %t: %s",
5146 bt, exprNode_unparse (ret)),
5147 e->loc);
5148 }
5149 }
5150 else
5151 {
5152 voptgenerror
5153 (FLG_ABSTRACT,
5154 message ("Cast from abstract type %t: %s",
5155 bt, exprNode_unparse (ret)),
5156 e->loc);
5157 }
5158 }
5159
5160 if (ctype_isAbstract (bc)
5161 && !context_hasAccess (ctype_typeId (bc)))
5162 {
5163 if (ctype_match (c, t))
5164 {
5165 ;
5166 }
5167 else
5168 {
e5081f8c 5169 if (ctype_isNumAbstract (bc))
5170 {
5171 if (exprNode_isNumLiteral (e))
5172 {
5173 voptgenerror
5174 (FLG_NUMABSTRACTCAST,
5175 message ("Cast from literal to numabstract type %t: %s", bc,
5176 exprNode_unparse (ret)),
5177 e->loc);
5178 }
5179 else
5180 {
5181 voptgenerror
5182 (FLG_NUMABSTRACT,
5183 message ("Cast to numabstract type %t: %s", bc,
5184 exprNode_unparse (ret)),
5185 e->loc);
5186 }
5187 }
5188 else
5189 {
5190 DPRINTF (("No access to: %s / %d",
5191 ctype_unparse (bc), ctype_typeId (bc)));
5192 DPRINTF (("Context %s %s",
5193 bool_unparse (context_inFunctionLike ()),
5194 context_unparse ()));
5195 voptgenerror
5196 (FLG_ABSTRACT,
5197 message ("Cast to abstract type %t: %s", bc,
5198 exprNode_unparse (ret)),
5199 e->loc);
5200 }
616915dd 5201 }
5202 }
5203 }
5204
5205 if (ctype_isAbstract (c))
5206 {
5207 if (sRef_isExposed (e->sref) || sRef_isOnly (e->sref))
5208 {
5209 /* okay, cast exposed to abstract */
5210 sRef_clearExKindComplete (ret->sref, fileloc_undefined);
5211 }
5212 else
5213 {
5214 if (ctype_isVisiblySharable (t)
5215 && sRef_isExternallyVisible (e->sref)
5216 && !(ctype_isAbstract (t)
5217 && context_hasAccess (ctype_typeId (t))))
5218 {
5219 voptgenerror
5220 (FLG_CASTEXPOSE,
5221 message ("Cast to abstract type from externally visible "
5222 "mutable storage exposes rep of %s: %s",
5223 ctype_unparse (c),
5224 exprNode_unparse (e)),
5225 e->loc);
5226 }
5227 }
5228 }
5229
5230 return (ret);
5231}
5232
5233static bool
5234evaluationOrderUndefined (lltok op)
5235{
5236 int opid = lltok_getTok (op);
5237
5238 return (opid != AND_OP && opid != OR_OP);
5239}
5240
5241static bool checkIntegral (/*@notnull@*/ exprNode e1,
5242 /*@notnull@*/ exprNode e2,
5243 /*@notnull@*/ exprNode ret,
5244 lltok op)
5245{
5246 bool error = FALSE;
5247
5248 ctype te1 = exprNode_getType (e1);
5249 ctype te2 = exprNode_getType (e2);
5250
5251 ctype tr1 = ctype_realishType (te1);
5252 ctype tr2 = ctype_realishType (te2);
5253
5254 if (ctype_isForceRealInt (&tr1) && ctype_isForceRealInt (&tr2))
5255 {
5256 ;
5257 }
5258 else
5259 {
5260 if (context_msgStrictOps ())
5261 {
5262 if (!ctype_isInt (tr1) && !ctype_isInt (tr2))
5263 {
5264 if (ctype_sameName (te1, te2))
5265 {
5266 error = optgenerror
5267 (FLG_STRICTOPS,
5268 message ("Operands of %s are non-integer (%t): %s",
5269 lltok_unparse (op), te1,
5270 exprNode_unparse (ret)),
5271 e1->loc);
5272 }
5273 else
5274 {
5275 error = optgenerror
5276 (FLG_STRICTOPS,
5277 message ("Operands of %s are non-integers (%t, %t): %s",
5278 lltok_unparse (op), te1, te2,
5279 exprNode_unparse (ret)),
5280 e1->loc);
5281 }
5282 }
5283 else if (!ctype_isInt (tr1))
5284 {
5285 error = optgenerror
5286 (FLG_STRICTOPS,
5287 message ("Left operand of %s is non-integer (%t): %s",
5288 lltok_unparse (op), te1, exprNode_unparse (ret)),
5289 e1->loc);
5290 }
5291 else
5292 /* !ctype_isInt (te2) */
5293 {
5294 error = optgenerror
5295 (FLG_STRICTOPS,
5296 message ("Right operand of %s is non-integer (%t): %s",
5297 lltok_unparse (op), te2, exprNode_unparse (ret)),
5298 e2->loc);
5299 }
5300 }
5301 }
5302
5303 return !error;
5304}
5305
5306/*
5307** returns exprNode representing e1 op e2
5308**
5309** uses msg if there are errors
5310** can be used for both assignment ops and regular ops
5311**
5312** modifies e1
5313*/
5314
5315static /*@only@*/ /*@notnull@*/ exprNode
5316exprNode_makeOp (/*@keep@*/ exprNode e1, /*@keep@*/ exprNode e2,
5317 /*@keep@*/ lltok op)
5318{
5319 ctype te1, te2, tr1, tr2, tret;
5320 int opid = lltok_getTok (op);
5321 bool hasError = FALSE;
5322 exprNode ret;
5323
5324 if (exprNode_isError (e1))
5325 {
5326 ret = exprNode_createPartialNVCopy (e2);
5327 }
5328 else
5329 {
5330 ret = exprNode_createPartialNVCopy (e1);
5331 }
5332
5333 ret->val = multiVal_undefined;
a956d444 5334
616915dd 5335 ret->kind = XPR_OP;
5336 ret->edata = exprData_makeOp (e1, e2, op);
5337
5338 if (exprNode_isError (e1) || exprNode_isError (e2))
5339 {
5340 if (opid == TLT || opid == TGT || opid == LE_OP || opid == GE_OP
5341 || opid == EQ_OP || opid == NE_OP
5342 || opid == AND_OP || opid == OR_OP)
5343 {
5344 ret->typ = ctype_bool;
5345 }
5346
5347 if (exprNode_isDefined (e1))
5348 {
5349 exprNode_checkUse (ret, e1->sref, e1->loc);
5350 }
5351
5352 if (exprNode_isDefined (e2))
5353 {
5354 exprNode_mergeUSs (ret, e2);
5355 exprNode_checkUse (ret, e2->sref, e2->loc);
5356 }
5357
5358 return ret;
5359 }
5360
5361 tret = ctype_unknown;
5362 te1 = exprNode_getType (e1);
8fe44445 5363
616915dd 5364 DPRINTF (("te1 = %s / %s", exprNode_unparse (e1), ctype_unparse (te1)));
5365
5366 te2 = exprNode_getType (e2);
5367
5368 tr1 = ctype_realishType (te1);
5369 tr2 = ctype_realishType (te2);
5370
5371 if (opid == OR_OP)
5372 {
10fac4bc 5373 exprNode_produceGuards (e2);
616915dd 5374 ret->guards = guardSet_or (ret->guards, e2->guards);
5375 }
5376 else if (opid == AND_OP)
5377 {
10fac4bc 5378 exprNode_produceGuards (e2); /* evans 2003-08-13: need to produce guards for expression */
5379 /* Shouldn't this have already happened? */
5380 DPRINTF (("Anding guards: %s / %s", guardSet_unparse (ret->guards), guardSet_unparse (e2->guards)));
616915dd 5381 ret->guards = guardSet_and (ret->guards, e2->guards);
5382 }
5383 else
5384 {
5385 /* no guards */
5386 }
5387
5388 if (opid == EQ_OP || opid == NE_OP)
5389 {
5390 exprNode temp1 = e1, temp2 = e2;
5391
5392 /* could do NULL == x */
5393
5394 if (exprNode_isNullValue (e1) || exprNode_isUnknownConstant (e1))
5395 {
5396 temp1 = e2; temp2 = e1;
5397 }
5398
5399 if (exprNode_isNullValue (temp2) || exprNode_isUnknownConstant (temp2))
5400 {
5401 reflectNullTest (temp1, (opid == NE_OP));
5402 guardSet_free (ret->guards);
5403 ret->guards = guardSet_copy (temp1->guards);
5404 }
5405 }
5406
5407 if (opid == TLT || opid == TGT || opid == LE_OP || opid == GE_OP
5408 || opid == EQ_OP || opid == NE_OP || opid == AND_OP || opid == OR_OP)
5409 {
5410 tret = ctype_bool;
5411 }
5412
5413 if (anyAbstract (tr1, tr2) &&
5414 (!((ctype_isRealBool (te1) || ctype_isRealBool (te2)) &&
5415 (opid == AND_OP || opid == OR_OP
5416 || opid == EQ_OP || opid == NE_OP))))
5417 {
e5081f8c 5418 if (abstractOpError (tr1, tr2, op, e1, e2, e1->loc, e2->loc))
5419 {
5420 tret = ctype_unknown;
5421 goto skiprest;
5422 }
616915dd 5423 }
e5081f8c 5424
5425 if (ctype_isUnknown (te1) || ctype_isUnknown (te2))
616915dd 5426 {
5427 /* unknown types, no comparisons possible */
e5081f8c 5428 goto skiprest;
616915dd 5429 }
e5081f8c 5430
5431 switch (opid)
616915dd 5432 {
e5081f8c 5433 case TMULT: /* multiplication and division: */
5434 case TDIV: /* */
5435 case MUL_ASSIGN: /* numeric, numeric -> numeric */
5436 case DIV_ASSIGN: /* */
5437 if (opid == TMULT || opid == MUL_ASSIGN)
616915dd 5438 {
e5081f8c 5439 ret->val = multiVal_multiply (exprNode_getValue (e1),
5440 exprNode_getValue (e2));
5441 }
5442 else
5443 {
5444 ret->val = multiVal_divide (exprNode_getValue (e1),
5445 exprNode_getValue (e2));
5446 }
5447
5448 tret = checkNumerics (tr1, tr2, te1, te2, e1, e2, op);
5449 break;
5450
5451 case TPLUS: /* addition and subtraction: */
5452 case TMINUS: /* pointer, int -> pointer */
5453 case SUB_ASSIGN: /* int, pointer -> pointer */
5454 case ADD_ASSIGN: /* numeric, numeric -> numeric */
5455 if (opid == TPLUS || opid == ADD_ASSIGN)
5456 {
5457 ret->val = multiVal_add (exprNode_getValue (e1),
5458 exprNode_getValue (e2));
5459 }
5460 else
5461 {
5462 ret->val = multiVal_subtract (exprNode_getValue (e1),
5463 exprNode_getValue (e2));
5464 }
5465
5466 tr1 = ctype_fixArrayPtr (tr1);
5467
5468 if ((ctype_isRealPointer (tr1) && !exprNode_isNullValue (e1))
5469 && (!ctype_isRealPointer (tr2) && ctype_isRealInt (tr2)))
5470 {
5471 /* pointer + int */
5472
5473 if (context_msgPointerArith ())
a956d444 5474 {
e5081f8c 5475 voptgenerror
5476 (FLG_POINTERARITH,
5477 message ("Pointer arithmetic (%t, %t): %s",
5478 te1, te2, exprNode_unparse (ret)),
5479 e1->loc);
a956d444 5480 }
616915dd 5481
e5081f8c 5482 /*
5483 ** Swap terms so e1 is always the pointer
5484 */
5485
5486 if (ctype_isRealPointer (tr1))
a956d444 5487 {
e5081f8c 5488 ;
a956d444 5489 }
5490 else
5491 {
e5081f8c 5492 exprNode_swap (e1, e2);
a956d444 5493 }
e5081f8c 5494
5495 if (sRef_possiblyNull (e1->sref)
5496 && !usymtab_isGuarded (e1->sref))
616915dd 5497 {
e5081f8c 5498 voptgenerror
5499 (FLG_NULLPOINTERARITH,
5500 message ("Pointer arithmetic involving possibly "
5501 "null pointer %s: %s",
5502 exprNode_unparse (e1),
5503 exprNode_unparse (ret)),
5504 e1->loc);
5505 }
5506
5507 ret->sref = sRef_copy (e1->sref);
5508
5509 /* start modifications */
5510 /* added by Seejo on 4/16/2000 */
5511
5512 /* Arithmetic operations on pointers wil modify the size/len/null terminated
5513 status */
5514 if ((sRef_isPossiblyNullTerminated (e1->sref)) || (sRef_isNullTerminated(e1->sref))) {
5515 int val;
5516 /*drl 1-4-2002
5517 added ugly fixed to stop
5518 program from crashing on point + int +int
5519 one day I'll fix this or ask Seejo wtf the codes supposed to do. */
5520
5521 if (!multiVal_isInt (e2->val) )
5522 break;
5523 /*end drl*/
5524
5525 val = (int) multiVal_forceInt (e2->val);
5526
5527 /* Operator : + or += */
5528 if ((lltok_getTok (op) == TPLUS) || (lltok_getTok(op) == ADD_ASSIGN)) {
5529 if (sRef_getSize(e1->sref) >= val) {/* Incrementing the pointer by
5530 val should not result in a
5531 size < 0 (size = 0 is ok !) */
ccf0a4a8 5532
e5081f8c 5533 sRef_setSize (ret->sref, sRef_getSize(e1->sref) - val);
ccf0a4a8 5534
e5081f8c 5535 if (sRef_getLen(e1->sref) == val) { /* i.e. the character at posn val is \0 */
5536 sRef_setNotNullTerminatedState(ret->sref);
5537 sRef_resetLen (ret->sref);
5538 } else {
5539 sRef_setNullTerminatedState(ret->sref);
5540 sRef_setLen (ret->sref, sRef_getLen(e1->sref) - val);
ccf0a4a8 5541 }
5542 }
616915dd 5543 }
e5081f8c 5544
5545 /* Operator : - or -= */
5546 if ((lltok_getTok (op) == TMINUS) || (lltok_getTok (op) == SUB_ASSIGN)) {
5547 if (sRef_getSize(e1->sref) >= 0) {
5548 sRef_setSize (ret->sref, sRef_getSize(e1->sref) + val);
5549 sRef_setLen (ret->sref, sRef_getLen(e1->sref) + val);
5550 }
5551 }
5552 }
5553
5554 /* end modifications */
5555
5556 sRef_setNullError (ret->sref);
5557
5558 /*
5559 ** Fixed for 2.2c: the alias state of ptr + int is dependent,
5560 ** since is points to storage that should not be deallocated
5561 ** through this pointer.
5562 */
5563
5564 if (sRef_isOnly (ret->sref)
5565 || sRef_isFresh (ret->sref))
616915dd 5566 {
e5081f8c 5567 sRef_setAliasKind (ret->sref, AK_DEPENDENT, exprNode_loc (ret));
5568 }
5569
5570 tret = e1->typ;
5571 }
5572 else if ((!ctype_isRealPointer(tr1) && ctype_isRealInt (tr1))
5573 && (ctype_isRealPointer (tr2) && !exprNode_isNullValue (e2)))
5574 {
5575 if (context_msgPointerArith ())
5576 {
5577 voptgenerror
5578 (FLG_POINTERARITH,
5579 message ("Pointer arithmetic (%t, %t): %s",
5580 te1, te2, exprNode_unparse (ret)),
5581 e1->loc);
5582 }
5583
5584 if (sRef_possiblyNull (e1->sref)
5585 && !usymtab_isGuarded (e1->sref))
5586 {
5587 voptgenerror
5588 (FLG_NULLPOINTERARITH,
5589 message ("Pointer arithmetic involving possibly "
5590 "null pointer %s: %s",
5591 exprNode_unparse (e2),
5592 exprNode_unparse (ret)),
5593 e2->loc);
5594 }
5595
5596 ret->sref = sRef_copy (e2->sref);
5597
5598 /* start modifications */
5599 /* added by Seejo on 4/16/2000 */
5600
5601 /* Arithmetic operations on pointers wil modify the size/len/null terminated
5602 status */
5603
5604 if ((sRef_isPossiblyNullTerminated (e2->sref)) || (sRef_isNullTerminated(e2->sref))) {
909cf5eb 5605 if (multiVal_isDefined (e1->val))
5606 {
5607 int val = (int) multiVal_forceInt (e1->val);
2209bcb7 5608
909cf5eb 5609 /* Operator : + or += */
5610 if ((lltok_getTok (op) == TPLUS) || (lltok_getTok(op) == ADD_ASSIGN)) {
5611 if (sRef_getSize(e2->sref) >= val) {/* Incrementing the pointer by
5612 val should not result in a
5613 size < 0 (size = 0 is ok !) */
5614
5615 sRef_setSize (ret->sref, sRef_getSize(e2->sref) - val);
5616
5617 if (sRef_getLen(e2->sref) == val) { /* i.e. the character at posn val is \0 */
5618 sRef_setNotNullTerminatedState(ret->sref);
5619 sRef_resetLen (ret->sref);
5620 } else {
5621 sRef_setNullTerminatedState(ret->sref);
5622 sRef_setLen (ret->sref, sRef_getLen(e2->sref) - val);
5623 }
5624 }
5625 }
2209bcb7 5626
909cf5eb 5627 /* Operator : - or -= */
5628 if ((lltok_getTok (op) == TMINUS) || (lltok_getTok (op) == SUB_ASSIGN)) {
5629 if (sRef_getSize(e2->sref) >= 0) {
5630 sRef_setSize (ret->sref, sRef_getSize(e2->sref) + val);
5631 sRef_setLen (ret->sref, sRef_getLen(e2->sref) + val);
5632 }
b7b694d6 5633 }
616915dd 5634 }
e5081f8c 5635 }
909cf5eb 5636
e5081f8c 5637 /* end modifications */
616915dd 5638
e5081f8c 5639 sRef_setNullError (ret->sref);
5640
5641 /*
5642 ** Fixed for 2.2c: the alias state of ptr + int is dependent,
5643 ** since is points to storage that should not be deallocated
5644 ** through this pointer.
5645 */
5646
5647 if (sRef_isOnly (ret->sref)
5648 || sRef_isFresh (ret->sref)) {
5649 sRef_setAliasKind (ret->sref, AK_DEPENDENT, exprNode_loc (ret));
5650 }
5651
5652 tret = e2->typ;
5653 ret->sref = e2->sref;
5654 }
5655 else
5656 {
5657 tret = checkNumerics (tr1, tr2, te1, te2, e1, e2, op);
5658 }
5659
5660 break;
5661
5662 case LEFT_ASSIGN:
5663 case RIGHT_ASSIGN:
5664 case LEFT_OP:
5665 case RIGHT_OP:
5666 case TAMPERSAND: /* bitwise & */
5667 case AND_ASSIGN:
5668 case TCIRC: /* ^ (XOR) */
5669 case TBAR:
5670 case XOR_ASSIGN:
5671 case OR_ASSIGN:
5672 {
5673 bool reported = FALSE;
5674
5675 /*
5676 ** Shift Operator
5677 */
5678
5679 if (opid == LEFT_OP || opid == LEFT_ASSIGN
5680 || opid == RIGHT_OP || opid == RIGHT_ASSIGN)
616915dd 5681 {
e5081f8c 5682 /*
5683 ** evans 2002-01-01: fixed this to follow ISO 6.5.7.
5684 */
5685
5686 if (!ctype_isUnsigned (tr2)
5687 && !exprNode_isNonNegative (e2))
5688 {
5689 reported = optgenerror
5690 (FLG_SHIFTNEGATIVE,
5691 message ("Right operand of %s may be negative (%t): %s",
5692 lltok_unparse (op), te2,
5693 exprNode_unparse (ret)),
5694 e2->loc);
5695 }
5696
5697 if (!ctype_isUnsigned (tr1)
5698 && !exprNode_isNonNegative (e1))
5699 {
5700 reported = optgenerror
5701 (FLG_SHIFTIMPLEMENTATION,
5702 message ("Left operand of %s may be negative (%t): %s",
5703 lltok_unparse (op), te1,
5704 exprNode_unparse (ret)),
5705 e1->loc);
5706 }
616915dd 5707
a956d444 5708 /*
e5081f8c 5709 ** Should check size of right operand also...
a956d444 5710 */
e5081f8c 5711
5712 }
5713 else
5714 {
5715 if (!ctype_isUnsigned (tr1))
616915dd 5716 {
e5081f8c 5717 if (exprNode_isNonNegative (e1)) {
5718 ;
5719 } else {
5720 reported = optgenerror
5721 (FLG_BITWISEOPS,
5722 message ("Left operand of %s is not unsigned value (%t): %s",
5723 lltok_unparse (op), te1,
5724 exprNode_unparse (ret)),
5725 e1->loc);
5726
5727 if (reported) {
5728 te1 = ctype_uint;
a956d444 5729 }
e5081f8c 5730 }
616915dd 5731 }
e5081f8c 5732 else
616915dd 5733 {
e5081f8c 5734 if (!ctype_isUnsigned (tr2))
616915dd 5735 {
e5081f8c 5736 if (!exprNode_isNonNegative (e2)) {
616915dd 5737 reported = optgenerror
a956d444 5738 (FLG_BITWISEOPS,
e5081f8c 5739 message ("Right operand of %s is not unsigned value (%t): %s",
5740 lltok_unparse (op), te2,
616915dd 5741 exprNode_unparse (ret)),
e5081f8c 5742 e2->loc);
5743 }
a956d444 5744 }
616915dd 5745 }
616915dd 5746 }
e5081f8c 5747
5748 if (!reported)
5749 {
5750 if (!checkIntegral (e1, e2, ret, op)) {
5751 te1 = ctype_unknown;
5752 }
616915dd 5753 }
e5081f8c 5754
5755 DPRINTF (("Set: %s", ctype_unparse (te1)));
5756
5757 /*
5758 ** tret is the widest type of te1 and te2
5759 */
5760
5761 tret = ctype_widest (te1, te2);
5762 break;
5763 }
5764 case MOD_ASSIGN:
5765 case TPERCENT:
5766 if (checkIntegral (e1, e2, ret, op)) {
5767 tret = te1;
5768 } else {
5769 tret = ctype_unknown;
5770 }
5771 break;
5772 case EQ_OP:
5773 case NE_OP:
5774 case TLT: /* comparisons */
5775 case TGT: /* numeric, numeric -> bool */
5776
5777 DPRINTF (("Here we go: %s / %s",
5778 ctype_unparse (tr1), ctype_unparse (tr2)));
5779
5780 if ((ctype_isReal (tr1) && !ctype_isInt (tr1))
5781 || (ctype_isReal (tr2) && !ctype_isInt (tr2)))
5782 {
5783 ctype rtype = tr1;
5784 bool fepsilon = FALSE;
5785
5786 if (!ctype_isReal (rtype) || ctype_isInt (rtype))
616915dd 5787 {
e5081f8c 5788 rtype = tr2;
5789 }
5790
5791 if (opid == TLT || opid == TGT)
5792 {
5793 uentry ue1 = exprNode_getUentry (e1);
5794 uentry ue2 = exprNode_getUentry (e2);
616915dd 5795
e5081f8c 5796 /*
5797 ** FLT_EPSILON, etc. really is a variable, not
5798 ** a constant.
5799 */
5800
5801 if (uentry_isVariable (ue1))
616915dd 5802 {
e5081f8c 5803 cstring uname = uentry_rawName (ue1);
5804
5805 if (cstring_equalLit (uname, "FLT_EPSILON")
5806 || cstring_equalLit (uname, "DBL_EPSILON")
5807 || cstring_equalLit (uname, "LDBL_EPSILON"))
616915dd 5808 {
e5081f8c 5809 fepsilon = TRUE;
616915dd 5810 }
5811 }
e5081f8c 5812
5813 if (uentry_isVariable (ue2))
616915dd 5814 {
e5081f8c 5815 cstring uname = uentry_rawName (ue2);
5816
5817 if (cstring_equalLit (uname, "FLT_EPSILON")
5818 || cstring_equalLit (uname, "DBL_EPSILON")
5819 || cstring_equalLit (uname, "LDBL_EPSILON"))
5820 {
5821 fepsilon = TRUE;
5822 }
616915dd 5823 }
5824 }
e5081f8c 5825
5826 if (fepsilon)
616915dd 5827 {
e5081f8c 5828 ; /* Don't complain. */
616915dd 5829 }
e5081f8c 5830 else
5831 {
5832 voptgenerror
5833 (FLG_REALCOMPARE,
5834 message ("Dangerous comparison involving %s types: %s",
5835 ctype_unparse (rtype),
5836 exprNode_unparse (ret)),
5837 ret->loc);
5838 }
5839 }
5840 /*@fallthrough@*/
5841 case LE_OP:
5842 case GE_OP:
5843
5844 /*
5845 ** Types should match.
5846 */
5847
5848 DPRINTF (("Match types: %s / %s", exprNode_unparse (e1),
5849 exprNode_unparse (e2)));
5850
5851 if (!exprNode_matchTypes (e1, e2))
5852 {
5853 hasError = gentypeerror
5854 (te1, e1, te2, e2,
5855 message ("Operands of %s have incompatible types (%t, %t): %s",
5856 lltok_unparse (op), te1, te2, exprNode_unparse (ret)),
5857 e1->loc);
5858
5859 }
5860
5861 if (hasError
5862 || (ctype_isForceRealNumeric (&tr1)
5863 && ctype_isForceRealNumeric (&tr2)) ||
5864 (ctype_isRealPointer (tr1) && ctype_isRealPointer (tr2)))
5865 {
5866 ; /* okay */
5867 }
5868 else
5869 {
5870 if ((ctype_isRealNumeric (tr1) && ctype_isRealPointer (tr2)) ||
5871 (ctype_isRealPointer (tr1) && ctype_isRealNumeric (tr2)))
616915dd 5872 {
e5081f8c 5873 voptgenerror
5874 (FLG_PTRNUMCOMPARE,
5875 message ("Comparison of pointer and numeric (%t, %t): %s",
5876 te1, te2, exprNode_unparse (ret)),
5877 e1->loc);
616915dd 5878 }
5879 else
5880 {
e5081f8c 5881 (void) checkNumerics (tr1, tr2, te1, te2, e1, e2, op);
616915dd 5882 }
e5081f8c 5883 tret = ctype_bool;
5884 }
5885
5886 /* certain comparisons on unsigned's and zero look suspicious */
5887
5888 if (opid == TLT || opid == LE_OP || opid == GE_OP)
5889 {
5890 if ((ctype_isUnsigned (tr1) && exprNode_isZero (e2))
5891 || (ctype_isUnsigned (tr2) && exprNode_isZero (e1)))
1d239d69 5892 {
e5081f8c 5893 voptgenerror
5894 (FLG_UNSIGNEDCOMPARE,
5895 message ("Comparison of unsigned value involving zero: %s",
5896 exprNode_unparse (ret)),
5897 e1->loc);
1d239d69 5898 }
e5081f8c 5899 }
5900
5901 /* EQ_OP should NOT be used with booleans (unless one is FALSE) */
5902
5903 if ((opid == EQ_OP || opid == NE_OP) &&
5904 ctype_isDirectBool (tr1) && ctype_isDirectBool (tr2))
5905 {
5906 /*
5907 ** is one a variable?
5908 */
616915dd 5909
e5081f8c 5910 if (uentry_isVariable (exprNode_getUentry (e1))
5911 || uentry_isVariable (exprNode_getUentry (e2)))
616915dd 5912 {
5913 /*
e5081f8c 5914 ** comparisons with FALSE are okay
616915dd 5915 */
e5081f8c 5916
5917 if (exprNode_isFalseConstant (e1)
5918 || exprNode_isFalseConstant (e2))
616915dd 5919 {
e5081f8c 5920 ;
5921 }
5922 else
5923 {
5924 voptgenerror
5925 (FLG_BOOLCOMPARE,
5926 message
5927 ("Use of %q with %s variables (risks inconsistency because "
5928 "of multiple true values): %s",
5929 cstring_makeLiteral ((opid == EQ_OP) ? "==" : "!="),
5930 context_printBoolName (), exprNode_unparse (ret)),
5931 e1->loc);
616915dd 5932 }
5933 }
e5081f8c 5934 }
5935 break;
5936
5937 case AND_OP: /* bool, bool -> bool */
5938 case OR_OP:
5939 if (ctype_isForceRealBool (&tr1) && ctype_isForceRealBool (&tr2))
5940 {
5941 ;
5942 }
5943 else
5944 {
5945 if (context_maybeSet (FLG_BOOLOPS))
616915dd 5946 {
e5081f8c 5947 if (!ctype_isRealBool (te1) && !ctype_isRealBool (te2))
616915dd 5948 {
e5081f8c 5949 if (ctype_sameName (te1, te2))
616915dd 5950 {
5951 voptgenerror
5952 (FLG_BOOLOPS,
e5081f8c 5953 message ("Operands of %s are non-boolean (%t): %s",
5954 lltok_unparse (op), te1,
5955 exprNode_unparse (ret)),
616915dd 5956 e1->loc);
5957 }
616915dd 5958 else
5959 {
e5081f8c 5960 voptgenerror
5961 (FLG_BOOLOPS,
5962 message
5963 ("Operands of %s are non-booleans (%t, %t): %s",
5964 lltok_unparse (op), te1, te2, exprNode_unparse (ret)),
5965 e1->loc);
616915dd 5966 }
5967 }
e5081f8c 5968 else if (!ctype_isRealBool (te1))
5969 {
5970 voptgenerror
5971 (FLG_BOOLOPS,
5972 message ("Left operand of %s is non-boolean (%t): %s",
5973 lltok_unparse (op), te1, exprNode_unparse (ret)),
5974 e1->loc);
5975 }
5976 else if (!ctype_isRealBool (te2))
5977 {
5978 voptgenerror
5979 (FLG_BOOLOPS,
5980 message ("Right operand of %s is non-boolean (%t): %s",
5981 lltok_unparse (op), te2, exprNode_unparse (ret)),
5982 e2->loc);
5983 }
5984 else
5985 {
5986 ;
5987 }
616915dd 5988 }
e5081f8c 5989 tret = ctype_bool;
616915dd 5990 }
e5081f8c 5991 break;
5992 default:
5993 llfatalbug
5994 (cstring_makeLiteral
5995 ("There has been a problem in the parser. This is believed to result "
5996 "from a problem with bison v. 1.25. Please try rebuidling Splint "
5997 "using the pre-compiled grammar files by commenting out the "
5998 "BISON= line in the top-level Makefile."));
616915dd 5999 }
6000
e5081f8c 6001skiprest:
616915dd 6002 ret->typ = tret;
e5081f8c 6003 DPRINTF (("Return type %s: %s", exprNode_unparse (ret), ctype_unparse (tret)));
616915dd 6004
6005 exprNode_checkUse (ret, e1->sref, e1->loc);
6006 exprNode_mergeUSs (ret, e2);
6007 exprNode_checkUse (ret, e2->sref, e2->loc);
6008
6009 return ret;
6010}
6011
6012/*@only@*/ exprNode
6013exprNode_op (/*@only@*/ exprNode e1, /*@keep@*/ exprNode e2,
6014 /*@only@*/ lltok op)
6015{
6016 exprNode ret;
6017
6018 checkMacroParen (e1);
6019 checkMacroParen (e2);
6020
6021 if (evaluationOrderUndefined (op) && context_maybeSet (FLG_EVALORDER))
6022 {
6023 checkExpressionDefined (e1, e2, op);
6024 }
6025
6026 ret = exprNode_makeOp (e1, e2, op);
6027 return (ret);
6028}
6029
6030static
6031void exprNode_checkAssignMod (exprNode e1, exprNode ret)
6032{
6033 /*
6034 ** This is somewhat bogus!
6035 **
6036 ** Assigning to a nested observer in a non-observer datatype
6037 ** should not produce an error.
6038 */
6039
6040 sRef ref = exprNode_getSref (e1);
6041
6042 DPRINTF (("Check assign mod: %s",
6043 sRef_unparseFull (ref)));
6044
6045 if (sRef_isObserver (ref)
28bf4b0b 6046 || ((sRef_isFileStatic (ref) || sRef_isFileOrGlobalScope (ref))
616915dd 6047 && ctype_isArray (ctype_realType (sRef_getType (ref)))))
6048 {
6049 sRef base = sRef_getBase (ref);
6050
6051 if (sRef_isValid (base) && sRef_isObserver (base))
6052 {
6053 exprNode_checkModify (e1, ret);
6054 }
6055 else
6056 {
6057 exprNode_checkModifyVal (e1, ret);
6058 }
6059 }
6060 else
6061 {
6062 exprNode_checkModify (e1, ret);
6063 }
6064}
6065
6066exprNode
abd7f895 6067exprNode_assign (/*@only@*/ exprNode e1, /*@only@*/ exprNode e2, /*@only@*/ lltok op)
616915dd 6068{
6069 bool isalloc = FALSE;
6070 bool isjustalloc = FALSE;
2209bcb7 6071 bool noalias = FALSE;
616915dd 6072 exprNode ret;
6073
6074 DPRINTF (("%s [%s] <- %s [%s]",
6075 exprNode_unparse (e1),
6076 ctype_unparse (e1->typ),
6077 exprNode_unparse (e2),
6078 ctype_unparse (e2->typ)));
6079
6080 if (lltok_getTok (op) != TASSIGN)
6081 {
6082 ret = exprNode_makeOp (e1, e2, op);
2209bcb7 6083
6084 DPRINTF (("Here goes: %s %s",
6085 ctype_unparse (e1->typ),
6086 ctype_unparse (e2->typ)));
6087
abd7f895 6088 if (exprNode_isDefined (e1)
6089 && exprNode_isDefined (e2))
2209bcb7 6090 {
abd7f895 6091 if (ctype_isNumeric (e2->typ)
6092 || ctype_isNumeric (e1->typ))
6093 {
6094 /* Its a pointer arithmetic expression like ptr += i */
6095 noalias = TRUE;
6096 }
6097 }
6098 }
616915dd 6099 else
6100 {
6101 ret = exprNode_createPartialCopy (e1);
6102 ret->kind = XPR_ASSIGN;
6103 ret->edata = exprData_makeOp (e1, e2, op);
6104
6105 if (!exprNode_isError (e2))
6106 {
6107 ret->sets = sRefSet_union (ret->sets, e2->sets);
6108 ret->msets = sRefSet_union (ret->msets, e2->msets);
6109 ret->uses = sRefSet_union (ret->uses, e2->uses);
6110 }
6111 }
6112
6113 checkExpressionDefined (e1, e2, op);
6114
6115 if (exprNode_isError (e1))
6116 {
6117 if (!exprNode_isError (e2))
6118 {
6119 ret->loc = fileloc_update (ret->loc, e2->loc);
6120 }
6121 else
6122 {
6123 ret->loc = fileloc_update (ret->loc, g_currentloc);
6124 }
6125 }
6126
6127 if (!exprNode_isError (e2))
6128 {
6129 checkMacroParen (e2);
6130 }
6131
6132 if (exprNode_isDefined (e1))
6133 {
6134 if (sRef_isMacroParamRef (e1->sref))
6135 {
6136 if (context_inIterDef ())
6137 {
6138 uentry ue = sRef_getUentry (e1->sref);
6139
6140 if (uentry_isYield (ue))
6141 {
6142 ;
6143 }
6144 else
6145 {
6146 if (fileloc_isDefined (e1->loc))
6147 {
6148 voptgenerror
6149 (FLG_MACROPARAMS,
6150 message ("Assignment to non-yield iter parameter: %q",
6151 sRef_unparse (e1->sref)),
6152 e1->loc);
6153 }
6154 else
6155 {
6156 voptgenerror
6157 (FLG_MACROPARAMS,
6158 message ("Assignment to non-yield iter parameter: %q",
6159 sRef_unparse (e1->sref)),
6160 g_currentloc);
6161 }
6162 }
6163 }
6164 else
6165 {
6166 if (fileloc_isDefined (e1->loc))
6167 {
6168 voptgenerror
6169 (FLG_MACROASSIGN,
6170 message ("Assignment to macro parameter: %q",
6171 sRef_unparse (e1->sref)),
6172 e1->loc);
6173 }
6174 else
6175 {
6176 voptgenerror
6177 (FLG_MACROASSIGN,
6178 message ("Assignment to macro parameter: %q",
6179 sRef_unparse (e1->sref)),
6180 g_currentloc);
6181 }
ccf0a4a8 6182
6183 exprNode_checkAssignMod (e1, ret); /* evans 2001-07-22 */
616915dd 6184 }
6185 }
6186 else
6187 {
6188 exprNode_checkAssignMod (e1, ret);
6189 }
6190
6191 if (exprNode_isDefined (e2))
6192 {
6193 if (lltok_getTok (op) == TASSIGN)
6194 {
6195 ctype te1 = exprNode_getType (e1);
6196 ctype te2 = exprNode_getType (e2);
6197
abd7f895 6198 if (ctype_isVoid (te2))
6199 {
6200 (void) gentypeerror
6201 (te2, e2, te1, e1,
6202 message ("Assignment of void value to %t: %s %s %s",
6203 te1, exprNode_unparse (e1),
6204 lltok_unparse (op),
6205 exprNode_unparse (e2)),
6206 e1->loc);
6207 }
6208 else if (!ctype_forceMatch (te1, te2))
616915dd 6209 {
6210 if (exprNode_matchLiteral (te1, e2))
6211 {
e5081f8c 6212 DPRINTF (("Literals match: %s / %s",
6213 ctype_unparse (te1), exprNode_unparse (e2)));
6214 if (ctype_isNumAbstract (te1)) {
6215 if (!context_flagOn (FLG_NUMABSTRACTLIT, e1->loc)) {
6216 (void) llgenhinterror
6217 (FLG_NUMABSTRACT,
6218 message
6219 ("Assignment of %t literal to numabstract type %t: %s %s %s",
6220 te2, te1,
6221 exprNode_unparse (e1),
6222 lltok_unparse (op),
6223 exprNode_unparse (e2)),
6224 cstring_makeLiteral
6225 ("Use +numabstractlit to allow numeric literals to be used as numabstract values"),
6226 e1->loc);
6227 }
6228 }
616915dd 6229 }
6230 else
6231 {
6232 (void) gentypeerror
6233 (te2, e2, te1, e1,
6234 message ("Assignment of %t to %t: %s %s %s",
6235 te2, te1, exprNode_unparse (e1),
6236 lltok_unparse (op),
6237 exprNode_unparse (e2)),
6238 e1->loc);
6239 }
6240 }
abd7f895 6241 else
6242 {
6243 /* Type checks okay */
6244 }
616915dd 6245 }
6246
6247 exprNode_mergeUSs (ret, e2);
6248 exprNode_checkUse (ret, e2->sref, e2->loc);
6249
2209bcb7 6250 DPRINTF (("Do assign! %s %s", exprNode_unparse (e1), exprNode_unparse (e2)));
6251 if (noalias)
6252 {
6253 ;
6254 }
6255 else
6256 {
6257 doAssign (e1, e2, FALSE);
6258 }
6259
616915dd 6260 ret->sref = e1->sref;
6261 }
6262 else
6263 {
6264 if (exprNode_isDefined (e2))
6265 {
6266 exprNode_mergeUSs (ret, e2);
2209bcb7 6267 exprNode_checkUse (ret, e2->sref, e2->loc);
616915dd 6268 }
6269 }
6270
6271 if (sRef_isPointer (e1->sref) && !sRef_isMacroParamRef (e1->sref))
6272 {
6273 exprNode_checkUse (ret, sRef_getBase (e1->sref), e1->loc);
6274 }
6275
6276 isjustalloc = sRef_isJustAllocated (e1->sref);
6277 isalloc = sRef_isAllocated (e1->sref);
6278
6279 if (sRef_isField (e1->sref))
6280 {
6281 sRef root = sRef_getRootBase (sRef_getBase (e1->sref));
6282
6283 if (!sRef_isAllocated (root) && !sRef_isMacroParamRef (root))
6284 {
6285 exprNode_checkUse (ret, root, e1->loc);
6286 }
6287
6288 }
6289
6290 /*
6291 ** be careful! this defines e1->sref.
6292 */
ccf0a4a8 6293
6294 /* evans 2001-07-22: removed if (!sRef_isMacroParamRef (e1->sref)) */
6295
1d239d69 6296 DPRINTF (("Setting: %s -> %s", exprNode_unparse (ret), sRef_unparse (e1->sref)));
ccf0a4a8 6297 exprNode_checkSet (ret, e1->sref);
616915dd 6298
6299 if (isjustalloc)
6300 {
6301 sRef_setAllocatedComplete (e1->sref, exprNode_isDefined (e2)
6302 ? e2->loc : e1->loc);
6303 }
6304 else
6305 {
6306 if (isalloc)
6307 {
6308 sRef_setAllocatedShallowComplete (e1->sref, exprNode_loc (e2));
6309 }
6310 }
6311 }
6312
6313 return ret;
6314}
6315
6316exprNode
6317exprNode_cond (/*@keep@*/ exprNode pred, /*@keep@*/ exprNode ifclause,
6318 /*@keep@*/ exprNode elseclause)
6319{
6320 exprNode ret;
6321
6322 if (!exprNode_isError (pred))
6323 {
6324 ret = exprNode_createPartialCopy (pred);
6325 checkMacroParen (pred);
6326 exprNode_checkPred (cstring_makeLiteralTemp ("conditional"), pred);
6327
6328 if (!exprNode_isError (ifclause))
6329 {
6330 checkMacroParen (ifclause); /* update macro counts! */
6331
6332 if (!exprNode_isError (elseclause))
6333 {
6334 checkMacroParen (elseclause);
6335
6336 if (!exprNode_matchTypes (ifclause, elseclause))
6337 {
6338 if (gentypeerror
6339 (exprNode_getType (ifclause),
6340 ifclause,
6341 exprNode_getType (elseclause),
6342 elseclause,
6343 message ("Conditional clauses are not of same type: "
6344 "%s (%t), %s (%t)",
6345 exprNode_unparse (ifclause),
6346 exprNode_getType (ifclause),
6347 exprNode_unparse (elseclause),
6348 exprNode_getType (elseclause)),
6349 ifclause->loc))
6350 {
6351 ret->sref = sRef_undefined;
6352 ret->typ = ctype_unknown;
6353 }
6354 }
6355 else
6356 {
6357 /* for now...should merge the states */
6358 ret->sref = ifclause->sref;
6359 ret->typ = ifclause->typ;
6360
6361 if (exprNode_isNullValue (ifclause))
6362 {
6363 ret->typ = elseclause->typ;
6364 }
6365 }
6366
6367 exprNode_checkUse (ret, pred->sref, pred->loc);
6368 exprNode_checkUse (ifclause, ifclause->sref, ifclause->loc);
6369 exprNode_checkUse (elseclause, elseclause->sref, elseclause->loc);
6370
6371 exprNode_mergeCondUSs (ret, ifclause, elseclause);
6372
6373 }
6374 else
6375 {
6376 ret->typ = ifclause->typ;
6377
6378 exprNode_checkUse (pred, pred->sref, pred->loc);
6379 exprNode_checkUse (ifclause, ifclause->sref, ifclause->loc);
6380
6381 exprNode_mergeCondUSs (ret, ifclause, exprNode_undefined);
6382 }
6383 }
6384 else
6385 {
6386 if (!exprNode_isError (elseclause))
6387 {
6388 ret->typ = elseclause->typ;
6389
6390 exprNode_checkUse (pred, pred->sref, pred->loc);
6391 exprNode_checkUse (elseclause, elseclause->sref, elseclause->loc);
6392
6393 exprNode_mergeCondUSs (ret, exprNode_undefined, elseclause);
6394 }
6395 }
6396 }
6397 else /* pred is error */
6398 {
6399 if (!exprNode_isError (ifclause))
6400 {
6401 ret = exprNode_createSemiCopy (ifclause);
6402
6403 checkMacroParen (ifclause); /* update macro counts! */
6404
6405 if (!exprNode_isError (elseclause))
6406 {
6407 checkMacroParen (elseclause);
6408
6409 ret->typ = ifclause->typ;
6410
6411 if (!ctype_forceMatch (ifclause->typ, elseclause->typ))
6412 {
6413 if (gentypeerror
6414 (exprNode_getType (ifclause),
6415 ifclause,
6416 exprNode_getType (elseclause),
6417 elseclause,
6418 message ("Conditional clauses are not of same type: "
6419 "%s (%t), %s (%t)",
6420 exprNode_unparse (ifclause),
6421 exprNode_getType (ifclause),
6422 exprNode_unparse (elseclause),
6423 exprNode_getType (elseclause)),
6424 ifclause->loc))
6425 {
6426 ret->typ = ctype_unknown;
6427 }
6428 }
6429
6430 exprNode_checkUse (ifclause, ifclause->sref, ifclause->loc);
6431 exprNode_checkUse (elseclause, elseclause->sref, elseclause->loc);
6432
6433 exprNode_mergeCondUSs (ret, ifclause, elseclause);
6434 }
6435 }
6436 else if (!exprNode_isError (elseclause)) /* pred, if errors */
6437 {
6438 ret = exprNode_createSemiCopy (ifclause);
6439
6440 ret->typ = elseclause->typ;
6441 checkMacroParen (elseclause);
6442
6443 exprNode_checkUse (elseclause, elseclause->sref, elseclause->loc);
6444 exprNode_mergeCondUSs (ret, exprNode_undefined, elseclause);
6445 }
6446 else /* all errors! */
6447 {
7ebcc5bb 6448 ret = exprNode_createLoc (ctype_unknown, fileloc_copy (g_currentloc));
616915dd 6449 }
6450 }
6451
6452 ret->kind = XPR_COND;
6453 ret->edata = exprData_makeCond (pred, ifclause, elseclause);
6454
6455 if (exprNode_isDefined (ifclause) && exprNode_isDefined (elseclause))
6456 {
6457 exprNode_combineControl (ret, ifclause, elseclause);
6458 }
6459
6460 return (ret);
6461}
6462
6463exprNode
6464exprNode_vaArg (/*@only@*/ lltok tok, /*@only@*/ exprNode arg, /*@only@*/ qtype qt)
6465{
6466 ctype totype = qtype_getType (qt);
6467 exprNode ret =
6468 exprNode_createPartialLocCopy (arg, fileloc_copy (lltok_getLoc (tok)));
6469 ctype targ;
6470
6471 /*
6472 ** check use of va_arg : <valist>, type -> type
6473 */
6474
6475 if (exprNode_isError (arg))
6476 {
6477 }
6478 else
6479 {
6480 targ = exprNode_getType (arg);
6481
6482 /*
6483 ** arg should have be a pointer
6484 */
6485
6486 if (!ctype_isUA (targ) ||
b73d1009 6487 (!typeId_equal (ctype_typeId (targ),
6488 usymtab_getTypeId (cstring_makeLiteralTemp ("va_list")))))
616915dd 6489 {
6490 voptgenerror
6491 (FLG_TYPE,
6492 message ("First argument to va_arg is not a va_list (type %t): %s",
6493 targ, exprNode_unparse (arg)),
6494 arg->loc);
6495 }
6496
6497 exprNode_checkSet (ret, arg->sref);
6498 }
6499
6500 /*
6501 ** return type is totype
6502 */
6503
6504 ret->typ = totype;
6505 ret->kind = XPR_VAARG;
6506 ret->edata = exprData_makeCast (tok, arg, qt);
6507
6508 return (ret);
6509}
6510
6511exprNode exprNode_labelMarker (/*@only@*/ cstring label)
6512{
6513 exprNode ret = exprNode_createPlain (ctype_undefined);
6514 ret->kind = XPR_LABEL;
6515 ret->edata = exprData_makeLiteral (label);
6516 ret->isJumpPoint = TRUE;
6517
6518 return (ret); /* for now, ignore label */
6519}
6520
6521exprNode exprNode_notReached (/*@returned@*/ exprNode stmt)
6522{
6523 if (exprNode_isDefined (stmt))
6524 {
6525 stmt->isJumpPoint = TRUE;
6526
6527 /* This prevent stray no return path errors, etc. */
6528 stmt->exitCode = XK_MUSTEXIT;
6529 }
6530
6531 return (stmt);
6532}
6533
6534bool exprNode_isDefaultMarker (exprNode e)
6535{
6536 if (exprNode_isDefined (e))
6537 {
6538 return (e->kind == XPR_DEFAULT || e->kind == XPR_FTDEFAULT);
6539 }
6540
6541 return FALSE;
6542}
6543
6544bool exprNode_isCaseMarker (exprNode e)
6545{
6546 if (exprNode_isDefined (e))
6547 {
6548 return (e->kind == XPR_FTCASE || e->kind == XPR_CASE);
6549 }
6550
6551 return FALSE;
6552}
6553
6554bool exprNode_isLabelMarker (exprNode e)
6555{
6556 if (exprNode_isDefined (e))
6557 {
6558 return (e->kind == XPR_LABEL);
6559 }
6560
6561 return FALSE;
6562}
6563
6564exprNode exprNode_caseMarker (/*@only@*/ exprNode test, bool fallThrough)
6565{
6566 exprNode ret = exprNode_createPartialCopy (test);
6567
6568 ret->kind = fallThrough ? XPR_FTCASE : XPR_CASE;
6569
6570 if (exprNode_isError (test)) {
6571 return ret;
6572 }
6573
6574 exprNode_checkUse (ret, test->sref, test->loc);
6575
6576 usymtab_setExitCode (ret->exitCode);
6577
6578 if (ret->mustBreak)
6579 {
6580 usymtab_setMustBreak ();
6581 }
6582
6583 ret->edata = exprData_makeSingle (test);
6584 ret->isJumpPoint = TRUE;
6585
6586 return ret;
6587}
6588
6589# if 0
6590exprNode exprNode_caseStatement (/*@only@*/ exprNode test, /*@only@*/ exprNode stmt, bool fallThrough)
6591{
6592 exprNode ret = exprNode_createPartialCopy (test);
6593
6594 ret->kind = fallThrough ? XPR_FTCASE : XPR_CASE;
6595 ret->edata = exprData_makePair (test, stmt);
6596 ret->isJumpPoint = TRUE;
6597
6598 if (exprNode_isError (test))
6599 {
6600 return ret;
6601 }
6602
6603 exprNode_checkUse (ret, test->sref, test->loc);
6604
6605 if (exprNode_isError (stmt))
6606 {
6607 return ret;
6608 }
6609
6610 exprNode_mergeUSs (ret, stmt);
6611
6612 ret->exitCode = stmt->exitCode;
6613 ret->mustBreak = stmt->mustBreak;
6614 ret->canBreak = stmt->canBreak;
6615
6616 usymtab_setExitCode (ret->exitCode);
6617
6618 if (ret->mustBreak)
6619 {
6620 usymtab_setMustBreak ();
6621 }
6622
6623 return ret;
6624}
6625# endif
6626
6627/*@notnull@*/ /*@only@*/ exprNode
6628exprNode_defaultMarker (/*@only@*/ lltok def, bool fallThrough)
6629{
6630 exprNode ret = exprNode_createTok (def);
6631
6632 ret->isJumpPoint = TRUE;
6633 ret->kind = fallThrough ? XPR_FTDEFAULT : XPR_DEFAULT;
6634 return (ret);
6635}
6636
6637bool
6638exprNode_mayEscape (exprNode e)
6639{
6640 if (exprNode_isDefined (e))
6641 {
6642 return exitkind_couldEscape (e->exitCode);
6643 }
6644 return FALSE;
6645}
6646
6647static bool
6648exprNode_mustBreak (exprNode e)
6649{
6650 if (exprNode_isDefined (e))
6651 {
6652 return e->mustBreak;
6653 }
8f8721fe 6654
616915dd 6655 return FALSE;
6656}
6657
6658bool
6659exprNode_mustEscape (exprNode e)
6660{
6661 if (exprNode_isDefined (e))
6662 {
6663 return exitkind_mustEscape (e->exitCode) || exprNode_mustBreak (e);
6664 }
6665
6666 return FALSE;
6667}
6668
6669bool
6670exprNode_errorEscape (exprNode e)
6671{
6672 if (exprNode_isDefined (e))
6673 {
6674 return exitkind_isError (e->exitCode);
6675 }
6676
6677 return FALSE;
6678}
6679
6680exprNode exprNode_concat (/*@only@*/ exprNode e1, /*@only@*/ exprNode e2)
6681{
6682 exprNode ret = exprNode_createPartialCopy (e1);
6683
28bf4b0b 6684 DPRINTF (("Concat: %s / %s", exprNode_unparse (e1), exprNode_unparse (e2)));
6685
616915dd 6686 ret->edata = exprData_makePair (e1, e2);
6687 ret->kind = XPR_STMTLIST;
6688
6689 if (exprNode_isDefined (e1))
6690 {
6691 ret->isJumpPoint = e1->isJumpPoint;
6692 ret->canBreak = e1->canBreak;
6693 }
6694 else
6695 {
6696 if (exprNode_isDefined (e2))
6697 {
6698 ret->loc = fileloc_update (ret->loc, e2->loc);
6699 }
6700 }
6701
6702 if (exprNode_isDefined (e2))
6703 {
6704 ret->exitCode = e2->exitCode;
6705 ret->mustBreak = e2->mustBreak;
6706 if (e2->canBreak) ret->canBreak = TRUE;
6707 }
6708
6709 /*
6710 ** if e1 must return, then e2 is unreachable!
6711 */
6712
6713 if (exprNode_isDefined (e1) && exprNode_isDefined (e2))
6714 {
6715 if ((exprNode_mustEscape (e1) || exprNode_mustBreak (e1))
6716 && !(e2->isJumpPoint))
6717 {
6718 if (context_getFlag (FLG_UNREACHABLE))
6719 {
6720 exprNode nr = e2;
6721
6722 if (e2->kind == XPR_STMT)
6723 {
6724 nr = exprData_getUopNode (e2->edata);
6725 }
6726
6727 if ((nr->kind == XPR_TOK
6728 && lltok_isSemi (exprData_getTok (nr->edata))))
6729 {
6730 /* okay to have unreachable ";" */
6731 ret->exitCode = XK_MUSTEXIT;
6732 ret->canBreak = TRUE;
6733 }
6734 else
6735 {
6736 if (optgenerror (FLG_UNREACHABLE,
6737 message ("Unreachable code: %s",
6738 exprNode_unparseFirst (nr)),
6739 exprNode_loc (nr)))
6740 {
6741 ret->isJumpPoint = TRUE;
6742 ret->mustBreak = FALSE;
6743 ret->exitCode = XK_ERROR;
6744 DPRINTF (("Jump point: %s", exprNode_unparse (ret)));
6745 }
6746 else
6747 {
6748 ret->exitCode = XK_MUSTEXIT;
6749 ret->canBreak = TRUE;
6750 }
6751
6752 }
6753 }
6754 }
6755 else
6756 {
6757 if ((e2->kind == XPR_CASE || e2->kind == XPR_DEFAULT))
6758 {
6759 /*
6760 ** We want a warning anytime we have:
6761 ** case xxx: ...
6762 ** yyy; <<<- no break or return
6763 ** case zzz: ...
6764 */
6765
6766 exprNode lastStmt = exprNode_lastStatement (e1);
6767
6768 if (exprNode_isDefined (lastStmt)
6769 && !exprNode_mustEscape (lastStmt)
6770 && !exprNode_mustBreak (lastStmt)
6771 && !exprNode_isCaseMarker (lastStmt)
6772 && !exprNode_isDefaultMarker (lastStmt)
6773 && !exprNode_isLabelMarker (lastStmt))
6774 {
6775 voptgenerror (FLG_CASEBREAK,
6776 cstring_makeLiteral
2209bcb7 6777 ("Fall through case (no preceding break)"),
616915dd 6778 e2->loc);
6779 }
6780 }
6781 }
6782 }
6783
6784 exprNode_mergeUSs (ret, e2);
28bf4b0b 6785
616915dd 6786 usymtab_setExitCode (ret->exitCode);
6787
6788 if (ret->mustBreak)
6789 {
6790 usymtab_setMustBreak ();
6791 }
6792
abd7f895 6793 DPRINTF (("==> %s", exprNode_unparse (ret)));
616915dd 6794 return ret;
6795}
6796
6797exprNode exprNode_createTok (/*@only@*/ lltok t)
6798{
b73d1009 6799 exprNode ret = exprNode_create (ctype_unknown);
616915dd 6800 ret->kind = XPR_TOK;
6801 ret->edata = exprData_makeTok (t);
6802 return ret;
6803}
6804
6805exprNode exprNode_statement (/*@only@*/ exprNode e, /*@only@*/ lltok t)
6806{
6807 if (!exprNode_isError (e))
6808 {
abd7f895 6809 exprChecks_checkStatementEffect(e);
616915dd 6810 }
6811
6812 return (exprNode_statementError (e, t));
6813}
6814
6815static exprNode exprNode_statementError (/*@only@*/ exprNode e, /*@only@*/ lltok t)
6816{
6817 exprNode ret = exprNode_createPartialCopy (e);
6818
6819 if (!exprNode_isError (e))
6820 {
6821 if (e->kind != XPR_ASSIGN)
6822 {
6823 exprNode_checkUse (ret, e->sref, e->loc);
6824 }
6825
6826 ret->exitCode = e->exitCode;
6827 ret->canBreak = e->canBreak;
6828 ret->mustBreak = e->mustBreak;
6829 }
6830
6831 ret->edata = exprData_makeUop (e, t);
6832 ret->kind = XPR_STMT;
6833
6834 return ret;
6835}
6836
6837exprNode exprNode_checkExpr (/*@returned@*/ exprNode e)
6838{
6839 if (!exprNode_isError (e))
6840 {
6841 if (e->kind != XPR_ASSIGN)
6842 {
6843 exprNode_checkUse (e, e->sref, e->loc);
6844 }
6845 }
6846
6847 return e;
6848}
6849
6850void exprNode_produceGuards (exprNode pred)
6851{
6852 if (!exprNode_isError (pred))
6853 {
6854 if (ctype_isRealPointer (pred->typ))
6855 {
6856 pred->guards = guardSet_addTrueGuard (pred->guards, pred->sref);
6857 }
6858
6859 exprNode_checkUse (pred, pred->sref, pred->loc);
6860 exprNode_resetSref (pred);
6861 }
6862}
6863
abd7f895 6864exprNode exprNode_compoundStatementExpression (/*@only@*/ lltok tlparen, /*@only@*/ exprNode e)
6865{
6866 exprNode laststmt;
6867
6868 DPRINTF (("Compound: %s", exprNode_unparse (e)));
6869
6870 if (!context_flagOn (FLG_GNUEXTENSIONS, exprNode_loc (e)))
6871 {
6872 (void) llgenhinterror
6873 (FLG_SYNTAX,
6874 message ("Compound statement expressions is not supported by ISO C99"),
6875 message ("Use +gnuextensions to allow compound statement expressions (and other GNU language extensions) "
6876 "without this warning"),
6877 exprNode_loc (e));
6878 }
6879
6880 /*
6881 ** The type of a compoundStatementExpression is the type of the last statement
6882 */
6883
6884 llassert (exprNode_isBlock (e));
6885 laststmt = exprNode_lastStatement (e);
6886
6887 DPRINTF (("Last statement: %s / %s", exprNode_unparse (laststmt), ctype_unparse (exprNode_getType (laststmt))));
6888 DPRINTF (("e: %s", exprNode_unparse (e)));
6889 e->typ = exprNode_getType (laststmt);
6890 return exprNode_addParens (tlparen, e);
6891}
6892
6893
616915dd 6894exprNode exprNode_makeBlock (/*@only@*/ exprNode e)
6895{
6896 exprNode ret = exprNode_createPartialCopy (e);
6897
6898 if (!exprNode_isError (e))
6899 {
6900 ret->exitCode = e->exitCode;
6901 ret->canBreak = e->canBreak;
6902 ret->mustBreak = e->mustBreak;
6903 }
6904
abd7f895 6905 DPRINTF (("Block e: %s", exprNode_unparse (e)));
616915dd 6906 ret->edata = exprData_makeSingle (e);
6907 ret->kind = XPR_BLOCK;
abd7f895 6908 DPRINTF (("Block: %s", exprNode_unparse (ret)));
616915dd 6909 return ret;
6910}
6911
6912bool exprNode_isBlock (exprNode e)
6913{
6914 return (exprNode_isDefined (e)
6915 && ((e)->kind == XPR_BLOCK));
6916}
abd7f895 6917
6918bool exprNode_isStatement (exprNode e)
6919{
6920 return (exprNode_isDefined (e)
6921 && ((e)->kind == XPR_STMT));
6922}
616915dd 6923
6924bool exprNode_isAssign (exprNode e)
6925{
6926 if (exprNode_isDefined (e))
6927 {
6928 return (e->kind == XPR_ASSIGN);
6929 }
6930
6931 return FALSE;
6932}
6933
6934bool exprNode_isEmptyStatement (exprNode e)
6935{
6936 return (exprNode_isDefined (e)
6937 && (e->kind == XPR_TOK)
6938 && (lltok_isSemi (exprData_getTok (e->edata))));
6939}
6940
abd7f895 6941bool exprNode_isMultiStatement (exprNode e)
6942{
6943 return (exprNode_isDefined (e)
6944 && ((e->kind == XPR_FOR)
6945 || (e->kind == XPR_FORPRED)
6946 || (e->kind == XPR_IF)
6947 || (e->kind == XPR_IFELSE)
6948 || (e->kind == XPR_WHILE)
6949 || (e->kind == XPR_WHILEPRED)
6950 || (e->kind == XPR_DOWHILE)
6951 || (e->kind == XPR_BLOCK)
6952 || (e->kind == XPR_STMT)
6953 || (e->kind == XPR_STMTLIST)
6954 || (e->kind == XPR_SWITCH)));
6955}
6956
2e127cb8 6957void exprNode_checkIfPred (exprNode pred)
6958{
6959 exprNode_checkPred (cstring_makeLiteralTemp ("if"), pred);
6960}
6961
616915dd 6962exprNode exprNode_if (/*@only@*/ exprNode pred, /*@only@*/ exprNode tclause)
6963{
6964 exprNode ret;
6965 bool emptyErr = FALSE;
6966
6967 if (context_maybeSet (FLG_IFEMPTY))
6968 {
6969 if (exprNode_isEmptyStatement (tclause))
6970 {
6971 emptyErr = optgenerror (FLG_IFEMPTY,
6972 cstring_makeLiteral
6973 ("Body of if statement is empty"),
6974 exprNode_loc (tclause));
6975 }
6976 }
6977
6978 if (!emptyErr && context_maybeSet (FLG_IFBLOCK))
6979 {
6980 if (exprNode_isDefined (tclause)
6981 && !exprNode_isBlock (tclause))
6982 {
6983 voptgenerror (FLG_IFBLOCK,
6984 message
6985 ("Body of if statement is not a block: %s",
6986 exprNode_unparse (tclause)),
6987 exprNode_loc (tclause));
6988 }
6989 }
6990
6991 if (exprNode_isError (pred))
6992 {
6993 if (exprNode_isError (tclause))
6994 {
7ebcc5bb 6995 ret = exprNode_createLoc (ctype_unknown, fileloc_copy (g_currentloc));
616915dd 6996 }
6997 else
6998 {
6999 ret = exprNode_createPartialCopy (tclause);
7000 }
7001 }
7002 else
7003 {
7004 if (exprNode_mustEscape (pred))
7005 {
7006 voptgenerror
7007 (FLG_UNREACHABLE,
7008 message ("Predicate always exits: %s", exprNode_unparse (pred)),
7009 exprNode_loc (pred));
7010 }
2e127cb8 7011
616915dd 7012 exprNode_checkUse (pred, pred->sref, pred->loc);
7013
7014 if (!exprNode_isError (tclause))
7015 {
7016 exprNode_mergeCondUSs (pred, tclause, exprNode_undefined);
7017 }
7018
7019 ret = exprNode_createPartialCopy (pred);
7020 }
7021
7022 ret->kind = XPR_IF;
7023 ret->edata = exprData_makePair (pred, tclause);
7024
7025 ret->exitCode = XK_UNKNOWN;
7026
7027 if (exprNode_isDefined (tclause))
7028 {
7029 ret->exitCode = exitkind_makeConditional (tclause->exitCode);
7030 ret->canBreak = tclause->canBreak;
7031 ret->sets = sRefSet_union (ret->sets, tclause->sets);
7032 ret->msets = sRefSet_union (ret->msets, tclause->msets);
7033 ret->uses = sRefSet_union (ret->uses, tclause->uses);
7034 }
7035
7036 ret->mustBreak = FALSE;
7037
7038 return ret;
7039}
7040
7041exprNode exprNode_ifelse (/*@only@*/ exprNode pred,
7042 /*@only@*/ exprNode tclause,
7043 /*@only@*/ exprNode eclause)
7044{
7045 exprNode ret;
7046 bool tEmptyErr = FALSE;
7047 bool eEmptyErr = FALSE;
7048
7049 if (context_maybeSet (FLG_IFEMPTY))
7050 {
7051 if (exprNode_isEmptyStatement (tclause))
7052 {
7053 tEmptyErr = optgenerror
7054 (FLG_IFEMPTY,
7055 cstring_makeLiteral
7056 ("Body of if clause of if statement is empty"),
7057 exprNode_loc (tclause));
7058 }
7059
7060 if (exprNode_isEmptyStatement (eclause))
7061 {
7062 eEmptyErr = optgenerror
7063 (FLG_IFEMPTY,
7064 cstring_makeLiteral
7065 ("Body of else clause of if statement is empty"),
7066 exprNode_loc (eclause));
7067 }
7068 }
7069
7070 if (context_maybeSet (FLG_IFBLOCK))
7071 {
7072 if (!tEmptyErr
7073 && exprNode_isDefined (tclause)
7074 && !exprNode_isBlock (tclause))
7075 {
7076 voptgenerror (FLG_IFBLOCK,
7077 message
7078 ("Body of if clause of if statement is not a block: %s",
7079 exprNode_unparse (tclause)),
7080 exprNode_loc (tclause));
7081 }
7082
7083 if (!eEmptyErr
7084 && exprNode_isDefined (eclause)
7085 && !exprNode_isBlock (eclause)
7086 && !(eclause->kind == XPR_IF)
7087 && !(eclause->kind == XPR_IFELSE))
7088 {
7089 voptgenerror
7090 (FLG_IFBLOCK,
7091 message
7092 ("Body of else clause of if statement is not a block: %s",
7093 exprNode_unparse (eclause)),
7094 exprNode_loc (eclause));
7095 }
7096 }
7097
7098 if (context_maybeSet (FLG_ELSEIFCOMPLETE))
7099 {
7100 if (exprNode_isDefined (eclause)
7101 && (eclause->kind == XPR_IF))
7102 {
7103 voptgenerror (FLG_ELSEIFCOMPLETE,
7104 message ("Incomplete else if logic (no final else): %s",
7105 exprNode_unparse (eclause)),
7106 exprNode_loc (eclause));
7107 }
7108 }
7109
7110 if (exprNode_isError (pred))
7111 {
7112 if (exprNode_isError (tclause))
7113 {
7114 if (exprNode_isError (eclause))
7115 {
7ebcc5bb 7116 ret = exprNode_createLoc (ctype_unknown, fileloc_copy (g_currentloc));
616915dd 7117 }
7118 else
7119 {
7120 ret = exprNode_createPartialCopy (eclause);
7121 }
7122 }
7123 else
7124 {
7125 ret = exprNode_createPartialCopy (tclause);
7126 }
7127 }
7128 else /* pred is okay */
7129 {
7130 ret = exprNode_createPartialCopy (pred);
7131
7132 if (exprNode_mustEscape (pred))
7133 {
7134 voptgenerror
7135 (FLG_UNREACHABLE,
7136 message ("Predicate always exits: %s", exprNode_unparse (pred)),
7137 exprNode_loc (pred));
7138 }
7139
616915dd 7140 exprNode_checkUse (ret, pred->sref, pred->loc);
616915dd 7141 exprNode_mergeCondUSs (ret, tclause, eclause);
7142 }
7143
7144 ret->kind = XPR_IFELSE;
7145 ret->edata = exprData_makeCond (pred, tclause, eclause);
7146
7147 if (exprNode_isDefined (tclause) && exprNode_isDefined (eclause))
7148 {
7149 exprNode_combineControl (ret, tclause, eclause);
7150 ret->loc = fileloc_update (ret->loc, eclause->loc);
7151 }
7152
7153 return ret;
7154}
7155
7156/*
7157** *allpaths <- TRUE iff all executions paths must go through the switch
7158*/
7159
7160static bool
7161checkSwitchExpr (exprNode test, /*@dependent@*/ exprNode e, /*@out@*/ bool *allpaths)
7162{
7163 exprNodeSList el = exprNode_flatten (e);
7164 bool mustReturn = TRUE; /* find a branch that doesn't */
7165 bool thisReturn = FALSE;
7166 bool hasDefault = FALSE;
7167 bool hasAllMembers = FALSE;
7168 bool inSwitch = FALSE;
7169 bool isEnumSwitch = FALSE;
7170 bool canBreak = FALSE;
7171 bool fallThrough = FALSE;
7172 ctype ct = ctype_unknown;
7173 enumNameSList usedEnums;
7174 enumNameList enums;
7175
7176 if (exprNode_isDefined (test))
7177 {
7178 ctype ttype;
7179
7180 ct = test->typ;
7181 ttype = ctype_realType (ct);
7182
7183 if (ctype_isEnum (ttype))
7184 {
7185 isEnumSwitch = TRUE;
7186 enums = ctype_elist (ttype);
7187 usedEnums = enumNameSList_new ();
7188 }
7189 }
7190
7191 exprNodeSList_elements (el, current)
7192 {
c21b4c87 7193
7194 DPRINTF ((message("checkSwitchExpr current = %s ", exprNode_unparse(current) ) ));
7195
616915dd 7196 if (exprNode_isDefined (current))
7197 {
7198 switch (current->kind)
7199 {
7200 case XPR_FTDEFAULT:
7201 case XPR_DEFAULT:
7202 if (hasDefault)
7203 {
7204 voptgenerror
bb7c2085 7205 (FLG_DUPLICATECASES,
616915dd 7206 message ("Duplicate default cases in switch"),
7207 exprNode_loc (current));
7208 }
7209 /*@fallthrough@*/
7210 case XPR_FTCASE:
7211 case XPR_CASE:
7212 if (current->kind == XPR_DEFAULT || current->kind == XPR_FTDEFAULT)
7213 {
7214 hasDefault = TRUE;
7215 }
7216 else
7217 {
7218 if (isEnumSwitch)
7219 {
7220 exprNode st = exprData_getSingle (current->edata);
7221 uentry ue = exprNode_getUentry (st);
7222
7223 if (uentry_isValid (ue))
7224 {
7225 cstring cname = uentry_rawName (ue);
7226
7227 if (enumNameList_member (/*@-usedef@*/enums/*@=usedef@*/, cname))
7228 {
7229 if (enumNameSList_member
7230 (/*@-usedef@*/usedEnums/*@=usedef@*/, cname))
7231 {
7232 voptgenerror
bb7c2085 7233 (FLG_DUPLICATECASES,
616915dd 7234 message ("Duplicate case in switch: %s",
7235 cname),
7236 current->loc);
7237 }
7238 else
7239 {
7240 enumNameSList_addh (usedEnums, cname);
7241 }
7242 }
7243 else
7244 {
7245 voptgenerror
7246 (FLG_TYPE,
7247 message ("Case in switch not %s member: %s",
7248 ctype_unparse (ct), cname),
7249 current->loc);
7250 }
7251 }
7252 }
7253 }
7254
7255 if (inSwitch && !fallThrough)
7256 {
7257 if (!thisReturn || canBreak)
7258 {
7259 mustReturn = FALSE;
7260 }
7261 }
7262
7263 fallThrough = TRUE;
7264 inSwitch = TRUE;
7265 thisReturn = FALSE;
7266 canBreak = FALSE;
7267 /*@switchbreak@*/ break;
7268 default:
7269 thisReturn = thisReturn || exprNode_mustEscape (current);
7270 canBreak = canBreak || current->canBreak;
7271 if (canBreak) fallThrough = FALSE;
7272 }
7273 }
7274 } end_exprNodeSList_elements;
7275
7276 if (inSwitch) /* check the last one! */
7277 {
7278 if (!thisReturn || canBreak)
7279 {
7280 mustReturn = FALSE;
7281 }
7282 }
7283
7284 if (isEnumSwitch)
7285 {
7286 if (!hasDefault
7287 && (enumNameSList_size (/*@-usedef@*/usedEnums/*@=usedef@*/) !=
7288 enumNameList_size (/*@-usedef@*/enums/*@=usedef@*/)))
7289 {
7290 enumNameSList unused = enumNameSList_subtract (enums, usedEnums);
7291
7292 voptgenerror (FLG_MISSCASE,
7293 message ("Missing case%s in switch: %q",
7294 cstring_makeLiteralTemp
7295 ((enumNameSList_size (unused) > 1) ? "s" : ""),
7296 enumNameSList_unparse (unused)),
7297 g_currentloc);
7298
7299 enumNameSList_free (unused);
3e3ec469 7300 *allpaths = FALSE; /* evans 2002-01-01 */
616915dd 7301 }
7302 else
7303 {
7304 hasAllMembers = TRUE;
7305 *allpaths = TRUE;
7306 }
7307
7308 enumNameSList_free (usedEnums);
7309 }
7310 else
7311 {
7312 *allpaths = hasDefault;
7313 }
7314
7315 exprNodeSList_free (el);
7316 return ((hasDefault || hasAllMembers) && mustReturn);
7317}
7318
7319exprNode exprNode_switch (/*@only@*/ exprNode e, /*@only@*/ exprNode s)
7320{
7321 exprNode ret = exprNode_createPartialCopy (e);
7322 bool allpaths;
7323
7324 DPRINTF (("Switch: %s", exprNode_unparse (s)));
7325
7326 ret->kind = XPR_SWITCH;
7327 ret->edata = exprData_makePair (e, s);
7328
7329 if (!exprNode_isError (s))
7330 {
7331 exprNode fs = exprNode_firstStatement (s);
7332 ret->loc = fileloc_update (ret->loc, s->loc);
7333
7334 if (exprNode_isUndefined (fs)
7335 || exprNode_isCaseMarker (fs) || exprNode_isLabelMarker (fs)
7336 || exprNode_isDefaultMarker (fs)) {
7337 ;
7338 } else {
7339 voptgenerror (FLG_FIRSTCASE,
7340 message
7341 ("Statement after switch is not a case: %s", exprNode_unparse (fs)),
7342 fs->loc);
7343 }
7344 }
7345
7346 if (!exprNode_isError (e))
7347 {
7348 if (checkSwitchExpr (e, s, &allpaths))
7349 {
7350 ret->exitCode = XK_MUSTRETURN;
7351 }
7352 else
7353 {
7354 ret->exitCode = e->exitCode;
7355 }
7356
7357 ret->canBreak = e->canBreak;
7358 ret->mustBreak = e->mustBreak;
7359 }
7360 /*
7361 ** forgot this!
7362 ** exprNode.c:3883,32: Variable allpaths used before definition
7363 */
7364 else
7365 {
7366 allpaths = FALSE;
7367 }
7368
7369 DPRINTF (("Context exit switch!"));
7370 context_exitSwitch (ret, allpaths);
7371 DPRINTF (("Context exit switch done!"));
7372
7373 return ret;
7374}
7375
7376static void checkInfiniteLoop (/*@notnull@*/ exprNode test,
7377 /*@notnull@*/ exprNode body)
7378{
7379 sRefSet tuses = test->uses;
7380
7381 if (!sRefSet_isEmpty (test->uses))
7382 {
7383 sRefSet sets = sRefSet_newCopy (body->sets);
7384 bool hasError = TRUE;
7385 bool innerState = FALSE;
7386 sRefSet tuncon = sRefSet_undefined;
7387
7388 sets = sRefSet_union (sets, test->sets);
7389 sets = sRefSet_union (sets, body->msets);
7390 sets = sRefSet_union (sets, test->msets);
7391
7392 sRefSet_allElements (tuses, el)
7393 {
7394 if (sRef_isUnconstrained (el))
7395 {
7396 tuncon = sRefSet_insert (tuncon, el);
7397 }
7398 else
7399 {
7400 if (sRefSet_member (sets, el))
7401 {
7402 hasError = FALSE;
7403 break;
7404 }
7405 }
7406
7407 if (sRef_isInternalState (el)
7408 || sRef_isFileStatic (sRef_getRootBase (el)))
7409 {
7410 innerState = TRUE;
7411 }
7412 } end_sRefSet_allElements ;
7413
7414 if (hasError)
7415 {
7416 sRefSet suncon = sRefSet_undefined;
7417 bool sinner = FALSE;
7418
7419 sRefSet_allElements (sets, el)
7420 {
7421 if (sRef_isUnconstrained (el))
7422 {
7423 suncon = sRefSet_insert (suncon, el);
7424 }
7425 else if (sRef_isInternalState (el))
7426 {
7427 sinner = TRUE;
7428 }
7429 else
7430 {
7431 ;
7432 }
7433 } end_sRefSet_allElements ;
7434
7435 if (sinner && innerState)
7436 {
7437 ;
7438 }
7439 else if (sRefSet_isEmpty (tuncon)
7440 && sRefSet_isEmpty (suncon))
7441 {
7442 voptgenerror
7443 (FLG_INFLOOPS,
7444 message
7445 ("Suspected infinite loop. No value used in loop test (%q) "
7446 "is modified by test or loop body.",
7447 sRefSet_unparsePlain (tuses)),
7448 test->loc);
7449 }
7450 else
7451 {
7452 if (sRefSet_isEmpty (tuncon))
7453 {
7454 voptgenerror
7455 (FLG_INFLOOPSUNCON,
7456 message ("Suspected infinite loop. No condition values "
7457 "modified. Modification possible through "
7458 "unconstrained calls: %q",
7459 sRefSet_unparsePlain (suncon)),
7460 test->loc);
7461 }
7462 else
7463 {
7464 voptgenerror
7465 (FLG_INFLOOPSUNCON,
7466 message ("Suspected infinite loop. No condition values "
7467 "modified. Possible undetected dependency through "
7468 "unconstrained calls in loop test: %q",
7469 sRefSet_unparsePlain (tuncon)),
7470 test->loc);
7471 }
7472 }
7473 }
7474
7475 sRefSet_free (sets);
7476 }
7477}
7478
7479exprNode exprNode_while (/*@keep@*/ exprNode t, /*@keep@*/ exprNode b)
7480{
7481 exprNode ret;
7482 bool emptyErr = FALSE;
616915dd 7483
7484 if (context_maybeSet (FLG_WHILEEMPTY))
7485 {
7486 if (exprNode_isEmptyStatement (b))
7487 {
7488 emptyErr = optgenerror
7489 (FLG_WHILEEMPTY,
7490 cstring_makeLiteral
7491 ("Body of while statement is empty"),
7492 exprNode_loc (b));
7493 }
7494 }
7495
7496 if (!emptyErr && context_maybeSet (FLG_WHILEBLOCK))
7497 {
7498 if (exprNode_isDefined (b)
7499 && !exprNode_isBlock (b))
7500 {
7501 if (context_inIterDef ()
7502 && (b->kind == XPR_STMTLIST
7503 || b->kind == XPR_TOK))
7504 {
7505 ; /* no error */
7506 }
7507 else
7508 {
7509 voptgenerror (FLG_WHILEBLOCK,
7510 message
7511 ("Body of while statement is not a block: %s",
7512 exprNode_unparse (b)),
7513 exprNode_loc (b));
7514 }
7515 }
7516 }
7517
7518 if (exprNode_isError (t))
7519 {
7520 if (exprNode_isError (b))
7521 {
7ebcc5bb 7522 ret = exprNode_createLoc (ctype_unknown, fileloc_copy (g_currentloc));
616915dd 7523 }
7524 else
7525 {
7526 ret = exprNode_createPartialCopy (b);
7527 }
7528 }
7529 else
7530 {
7531 exprNode test;
7532
7533 ret = exprNode_createPartialCopy (t);
7534
7535 llassert (t->kind == XPR_WHILEPRED);
7536
7537 test = exprData_getSingle (t->edata);
7538
7539 if (!exprNode_isError (b) && exprNode_isDefined (test))
7540 {
7541 if (context_maybeSet (FLG_INFLOOPS)
7542 || context_maybeSet (FLG_INFLOOPSUNCON))
7543 {
7544 /*
7545 ** check that some variable in the predicate is set by the body
7546 ** if the predicate uses any variables
7547 */
7548
7549 checkInfiniteLoop (test, b);
7550 }
7551
7552 exprNode_mergeUSs (ret, b);
7553
7554 if (exprNode_isDefined (b))
7555 {
7556 ret->exitCode = exitkind_makeConditional (b->exitCode);
7557 }
7558 }
7559 }
7560
7561 ret->edata = exprData_makePair (t, b);
7562 ret->kind = XPR_WHILE;
7563
7564 if (exprNode_isDefined (t) && exprNode_mustEscape (t))
7565 {
7566 voptgenerror
bb7c2085 7567 (FLG_ALWAYSEXITS,
616915dd 7568 message ("Predicate always exits: %s", exprNode_unparse (t)),
7569 exprNode_loc (t));
7570 }
7571
7572 ret->exitCode = XK_NEVERESCAPE;
7573
7574 /*
7575 ** If loop is infinite, and there is no break inside,
7576 ** exit code is never reach.
7577 */
7578
7579 if (exprNode_knownIntValue (t))
7580 {
7581 if (!exprNode_isZero (t))
7582 {
7583 if (exprNode_isDefined (b))
7584 {
7585 if (!b->canBreak)
7586 {
7587 /* Really, it means never reached. */
7588 ret->exitCode = XK_MUSTEXIT;
7589 }
7590 }
7591 }
7592 }
7593 else
7594 {
7595 ;
7596 }
7597
7598 ret->canBreak = FALSE;
7599 ret->mustBreak = FALSE;
7600
7601 return ret;
7602}
7603
7604/*
7605** do { b } while (t);
7606**
7607** note: body passed as first argument
7608*/
7609
7610exprNode exprNode_doWhile (/*@only@*/ exprNode b, /*@only@*/ exprNode t)
7611{
7612 exprNode ret;
8f8721fe 7613
7614 DPRINTF (("Do while: %s / %s",
7615 exprNode_unparse (b), exprNode_unparse (t)));
7616
616915dd 7617 if (exprNode_isError (t))
7618 {
7619 if (exprNode_isError (b))
7620 {
7ebcc5bb 7621 ret = exprNode_createLoc (ctype_unknown, fileloc_copy (g_currentloc));
616915dd 7622 }
7623 else
7624 {
7625 ret = exprNode_createPartialCopy (b);
7626
7627 ret->exitCode = exitkind_makeConditional (b->exitCode);
7628 exprNode_checkUse (ret, b->sref, b->loc);
7629 ret->exitCode = b->exitCode;
7630 ret->canBreak = b->canBreak;
8f8721fe 7631 ret->mustBreak = FALSE;
616915dd 7632 }
7633 }
7634 else
7635 {
8f8721fe 7636 DPRINTF (("Do while: %s / %s",
7637 exitkind_unparse (t->exitCode),
7638 exitkind_unparse (b->exitCode)));
7639
616915dd 7640 ret = exprNode_createPartialCopy (t);
7641 exprNode_checkPred (cstring_makeLiteralTemp ("while"), t);
7642
7643 if (!exprNode_isError (b))
7644 {
7645 /*
7646 ** forgot the copy's --- why wasn't this detected??
7647 */
7648
28bf4b0b 7649 ret->sets = sRefSet_copyInto (ret->sets, b->sets);
7650 ret->msets = sRefSet_copyInto (ret->msets, b->msets);
7651 ret->uses = sRefSet_copyInto (ret->uses, b->uses);
616915dd 7652
7653 /* left this out --- causes and aliasing bug (infinite loop)
7654 should be detected?? */
7655
7656 exprNode_checkUse (ret, b->sref, b->loc);
7657 exprNode_mergeUSs (ret, t);
7658 exprNode_checkUse (ret, t->sref, t->loc);
7659
8f8721fe 7660 /* evans 2001-10-05: while loop can break */
7661 ret->exitCode = exitkind_makeConditional (b->exitCode);
7662
7663 DPRINTF (("Do while: %s",
7664 exitkind_unparse (ret->exitCode)));
7665
616915dd 7666 ret->canBreak = b->canBreak;
8f8721fe 7667
7668 /* Always FALSE for doWhile loops - break's when test is false */
7669 ret->mustBreak = FALSE; /* b->mustBreak; */
616915dd 7670 }
7671 }
7672
7673 context_exitDoWhileClause (t);
7674
7675 ret->kind = XPR_DOWHILE;
7676 ret->edata = exprData_makePair (t, b);
7ebcc5bb 7677 return ret;
616915dd 7678}
7679
3e3ec469 7680bool exprNode_loopMustExec (exprNode forPred)
7681{
7682 /*
7683 ** Returns true if it is obvious that the loop always executes at least once
7684 **
7685 ** For now, we only identify the most obvious cases. Should be true anytime
7686 ** we can prove init => !test.
7687 */
7688
7689 if (exprNode_isDefined (forPred))
7690 {
7691 exprNode init, test, inc;
7692 exprData edata;
7693
7694 llassert (forPred->kind == XPR_FORPRED);
7695
7696 edata = forPred->edata;
7697 init = exprData_getTripleInit (edata);
7698 test = exprData_getTripleTest (edata);
7699 inc = exprData_getTripleInc (edata);
7700
7701 if (exprNode_isAssign (init))
7702 {
7703 exprNode loopVar = exprData_getOpA (init->edata);
7704 exprNode loopInit = exprData_getOpB (init->edata);
7705
7706 if (exprNode_isDefined (test) && test->kind == XPR_OP)
7707 {
7708 exprNode testVar = exprData_getOpA (test->edata);
7709 exprNode testVal = exprData_getOpB (test->edata);
7710 lltok comp = exprData_getOpTok (test->edata);
7711 int opid = lltok_getTok (comp);
7712
7713 DPRINTF (("Same storage: %s / %s", exprNode_unparse (loopVar),
7714 exprNode_unparse (testVar)));
7715
7716 if (exprNode_sameStorage (loopVar, testVar))
7717 {
7718 multiVal valinit = exprNode_getValue (loopInit);
7719 multiVal valtest = exprNode_getValue (testVal);
7720
7721 DPRINTF (("Values: %s / %s", multiVal_unparse (valinit),
7722 multiVal_unparse (valtest)));
7723
7724 if (multiVal_isInt (valinit) && multiVal_isInt (valtest))
7725 {
7726 long v1 = multiVal_forceInt (valinit);
7727 long v2 = multiVal_forceInt (valtest);
7728
7729 DPRINTF (("Here: %ld %ld", v1, v2));
7730
7731 if ((opid == EQ_OP && v1 < v2)
7732 || (opid == NE_OP && v1 != v2)
7733 || (opid == TLT && v1 <= v2)
7734 || (opid == TGT && v1 >= v2)
7735 || (opid == LE_OP && v1 < v2)
7736 || (opid == GE_OP && v1 > v2))
7737 {
7738 DPRINTF (("mustexec if inc"));
7739 return TRUE;
7740 }
7741 }
7742 }
7743 }
7744 }
7745 }
7746
7747 DPRINTF (("loop must exec: FALSE"));
7748 return FALSE;
7749}
7750
616915dd 7751exprNode exprNode_for (/*@keep@*/ exprNode inc, /*@keep@*/ exprNode body)
7752{
7753 exprNode ret;
7754 bool emptyErr = FALSE;
7755
7756 if (context_maybeSet (FLG_FOREMPTY))
7757 {
7758 if (exprNode_isEmptyStatement (body))
7759 {
7760 emptyErr = optgenerror
7761 (FLG_FOREMPTY,
7762 cstring_makeLiteral
7763 ("Body of for statement is empty"),
7764 exprNode_loc (body));
7765 }
7766 }
7767
7768 if (!emptyErr && context_maybeSet (FLG_FORBLOCK))
7769 {
7770 if (exprNode_isDefined (body)
7771 && !exprNode_isBlock (body))
7772 {
7773 if (context_inIterDef ()
7774 && (body->kind == XPR_STMTLIST
7775 || body->kind == XPR_TOK))
7776 {
7777 ; /* no error */
7778 }
7779 else
7780 {
7781 voptgenerror (FLG_FORBLOCK,
7782 message
7783 ("Body of for statement is not a block: %s",
7784 exprNode_unparse (body)),
7785 exprNode_loc (body));
7786 }
7787 }
7788 }
7789
7790 /*
7791 ** for ud purposes: (alreadly) init -> test -> (now) LOOP: body + inc + test
7792 */
7793
7794 if (exprNode_isError (body))
7795 {
7796 ret = exprNode_createPartialCopy (inc);
7797 }
7798 else
7799 {
7800 ret = exprNode_createPartialCopy (body);
7801
7802 ret->exitCode = exitkind_makeConditional (body->exitCode);
7803
3e3ec469 7804 exprNode_mergeUSs (inc, body);
616915dd 7805
7806 if (exprNode_isDefined (inc))
7807 {
7808 exprNode tmp;
7809
7810 context_setMessageAnnote (cstring_makeLiteral ("in post loop increment"));
616915dd 7811
7812 tmp = exprNode_effect (exprData_getTripleInc (inc->edata));
7813 exprNode_freeShallow (tmp);
7814
7815 context_clearMessageAnnote ();
7816 context_setMessageAnnote (cstring_makeLiteral ("in post loop test"));
7817
7818 tmp = exprNode_effect (exprData_getTripleTest (inc->edata));
7819 exprNode_freeShallow (tmp);
7820
7821 context_clearMessageAnnote ();
7822
28bf4b0b 7823 ret->uses = sRefSet_copyInto (ret->uses, inc->uses);
7824 ret->sets = sRefSet_copyInto (ret->sets, inc->sets);
7825 ret->msets = sRefSet_copyInto (ret->msets, inc->msets);
616915dd 7826 }
7827 }
7828
7829 ret->kind = XPR_FOR;
7830 ret->edata = exprData_makePair (inc, body);
7831
7832 if (exprNode_isDefined (inc)) {
7833 exprNode test = exprData_getTripleTest (inc->edata);
7834
7835 if (exprNode_isUndefined (test)) {
7836 if (exprNode_isDefined (body)) {
7837 if (!body->canBreak) {
7838 /* Really, it means never reached. */
7839 ret->exitCode = XK_MUSTEXIT;
7840 }
7841 }
7842 }
7843 }
7844
7845 return (ret);
7846}
7847
7848/*
7849** for (init; test; inc)
7850** ==>
7851** init;
7852** while (test) { body; inc; }
7853**
7854** Now: check use of init (may set vars for test)
7855** check use of test
7856** no checks on inc
7857_*/
7858
7859/*@observer@*/ guardSet exprNode_getForGuards (exprNode pred)
7860{
7861 exprNode test;
7862
7863 if (exprNode_isError (pred)) return guardSet_undefined;
7864
7865 llassert (pred->kind == XPR_FORPRED);
7866
7867 test = exprData_getTripleTest (pred->edata);
7868
7869 if (!exprNode_isError (test))
7870 {
7871 return (test->guards);
7872 }
7873
7874 return guardSet_undefined;
7875}
7876
7877exprNode exprNode_whilePred (/*@only@*/ exprNode test)
7878{
7879 exprNode ret = exprNode_createSemiCopy (test);
7880
7881 if (exprNode_isDefined (test))
7882 {
7883 exprNode_copySets (ret, test);
7884 exprNode_checkPred (cstring_makeLiteralTemp ("while"), test);
7885 exprNode_checkUse (ret, test->sref, test->loc);
7886
7887 exprNode_produceGuards (test);
7888
7889 ret->guards = guardSet_copy (test->guards);
7890 }
7891
7892 ret->edata = exprData_makeSingle (test);
7893 ret->kind = XPR_WHILEPRED;
7894 return ret;
7895}
7896
7897exprNode exprNode_forPred (/*@only@*/ exprNode init, /*@only@*/ exprNode test,
7898 /*@only@*/ exprNode inc)
7899{
7900 exprNode ret;
7901
7902 /*
7903 ** for ud purposes: init -> test -> LOOP: [ body, inc ]
7904 */
7905
7906 exprNode_checkPred (cstring_makeLiteralTemp ("for"), test);
7907
7908 if (!exprNode_isError (inc))
7909 {
7910 ret = exprNode_createPartialCopy (inc);
7911 }
7912 else
7913 {
7914 if (!exprNode_isError (init))
7915 {
7916 ret = exprNode_createPartialCopy (init);
7917 }
7918 else if (!exprNode_isError (test))
7919 {
7920 ret = exprNode_createPartialCopy (test);
7921 }
7922 else
7923 {
7924 ret = exprNode_createUnknown ();
7925 }
7926 }
7927
7928 exprNode_mergeUSs (ret, init);
7929
7930 if (exprNode_isDefined (init))
7931 {
7932 exprNode_checkUse (ret, init->sref, init->loc);
7933 }
7934
7935 exprNode_mergeUSs (ret, test);
7936
7937 if (exprNode_isDefined (test))
7938 {
7939 exprNode_checkUse (ret, test->sref, test->loc);
7940 }
7941
7942 ret->kind = XPR_FORPRED;
7943 ret->edata = exprData_makeFor (init, test, inc);
7944 return (ret);
7945}
7946
7947/*@notnull@*/ /*@only@*/ exprNode exprNode_goto (/*@only@*/ cstring label)
7948{
7949 exprNode ret = exprNode_createUnknown ();
7950
7951 if (context_inMacro ())
7952 {
7953 voptgenerror (FLG_MACROSTMT,
7954 message ("Macro %s uses goto (not functional)",
7955 context_inFunctionName ()),
7956 g_currentloc);
7957 }
7958
7959 ret->kind = XPR_GOTO;
7960 ret->edata = exprData_makeLiteral (label);
7961 ret->mustBreak = TRUE;
7962 ret->exitCode = XK_GOTO;
7963 ret->canBreak = TRUE;
7964 return ret;
7965}
7966
7967exprNode exprNode_continue (/*@only@*/ lltok l, int qcontinue)
7968{
7969 exprNode ret = exprNode_createLoc (ctype_unknown, fileloc_copy (lltok_getLoc (l)));
7970
7971 ret->kind = XPR_CONTINUE;
7972 ret->edata = exprData_makeTok (l);
7973 ret->canBreak = TRUE;
7974 ret->mustBreak = TRUE;
7975
7976 if (qcontinue == QSAFEBREAK)
7977 {
7978 ; /* no checking */
7979 }
7980 else if (qcontinue == QINNERCONTINUE)
7981 {
7982 if (!context_inDeepLoop ())
7983 {
7984 voptgenerror
7985 (FLG_LOOPLOOPCONTINUE,
7986 cstring_makeLiteral ("Continue statement marked with innercontinue "
7987 "is not inside a nested loop"),
7988 exprNode_loc (ret));
7989 }
7990 }
7991 else if (qcontinue == BADTOK)
7992 {
7993 if (context_inDeepLoop ())
7994 {
7995 voptgenerror
7996 (FLG_LOOPLOOPCONTINUE,
7997 cstring_makeLiteral ("Continue statement in nested loop"),
7998 exprNode_loc (ret));
7999 }
8000 }
8001 else
8002 {
8003 llbuglit ("exprNode_continue: bad qcontinue");
8004 }
8005
8006 return ret;
8007}
8008
8009exprNode exprNode_break (/*@only@*/ lltok l, int bqual)
8010{
8011 exprNode ret = exprNode_createLoc (ctype_unknown, fileloc_copy (lltok_getLoc (l)));
8012 clause breakClause = context_breakClause ();
8013
8014 ret->kind = XPR_BREAK;
8015 ret->edata = exprData_makeTok (l);
8016 ret->canBreak = TRUE;
8017 ret->mustBreak = TRUE;
8018
8019 if (breakClause == NOCLAUSE)
8020 {
8021 voptgenerror
8022 (FLG_SYNTAX,
8023 cstring_makeLiteral ("Break not inside while, for or switch statement"),
8024 exprNode_loc (ret));
8025 }
8026 else
8027 {
8028 if (bqual != BADTOK)
8029 {
8030 switch (bqual)
8031 {
8032 case QSAFEBREAK:
8033 break;
8034 case QINNERBREAK:
8035 if (breakClause == SWITCHCLAUSE)
8036 {
8037 if (!context_inDeepSwitch ())
8038 {
8039 voptgenerror (FLG_SYNTAX,
8040 cstring_makeLiteral
8041 ("Break preceded by innerbreak is not in a deep switch"),
8042 exprNode_loc (ret));
8043 }
8044 }
8045 else
8046 {
8047 if (!context_inDeepLoop ())
8048 {
8049 voptgenerror (FLG_SYNTAX,
8050 cstring_makeLiteral
8051 ("Break preceded by innerbreak is not in a deep loop"),
8052 exprNode_loc (ret));
8053 }
8054 }
8055 break;
8056 case QLOOPBREAK:
8057 if (breakClause == SWITCHCLAUSE)
8058 {
8059 voptgenerror (FLG_SYNTAX,
8060 cstring_makeLiteral
8061 ("Break preceded by loopbreak is breaking a switch"),
8062 exprNode_loc (ret));
8063 }
8064 break;
8065 case QSWITCHBREAK:
8066 if (breakClause != SWITCHCLAUSE)
8067 {
8068 voptgenerror
8069 (FLG_SYNTAX,
8070 message ("Break preceded by switchbreak is breaking %s",
8071 cstring_makeLiteralTemp
8072 ((breakClause == WHILECLAUSE
8073 || breakClause == DOWHILECLAUSE) ? "a while loop"
8074 : (breakClause == FORCLAUSE) ? "a for loop"
8075 : (breakClause == ITERCLAUSE) ? "an iterator"
8076 : "<error loop>")),
8077 exprNode_loc (ret));
8078 }
8079 break;
8080 BADDEFAULT;
8081 }
8082 }
8083 else
8084 {
8085 if (breakClause == SWITCHCLAUSE)
8086 {
8087 clause nextBreakClause = context_nextBreakClause ();
8088
8089 switch (nextBreakClause)
8090 {
8091 case NOCLAUSE: break;
8092 case WHILECLAUSE:
8093 case DOWHILECLAUSE:
8094 case FORCLAUSE:
8095 case ITERCLAUSE:
8096 voptgenerror
8097 (FLG_LOOPSWITCHBREAK,
8098 cstring_makeLiteral ("Break statement in switch inside loop"),
8099 exprNode_loc (ret));
8100 break;
8101 case SWITCHCLAUSE:
8102 voptgenerror
8103 (FLG_SWITCHSWITCHBREAK,
8104 cstring_makeLiteral ("Break statement in switch inside switch"),
8105 exprNode_loc (ret));
8106 break;
8107 BADDEFAULT;
8108 }
8109 }
8110 else
8111 {
8112 if (context_inDeepLoop ())
8113 {
8114 voptgenerror
8115 (FLG_LOOPLOOPBREAK,
8116 cstring_makeLiteral ("Break statement in nested loop"),
8117 exprNode_loc (ret));
8118 }
8119 else
8120 {
8121 if (context_inDeepLoopSwitch ())
8122 {
8123 voptgenerror
8124 (FLG_SWITCHLOOPBREAK,
8125 cstring_makeLiteral ("Break statement in loop inside switch"),
8126 exprNode_loc (ret));
8127 }
8128 }
8129 }
8130 }
8131 }
8132
8133 return ret;
8134}
8135
8136exprNode exprNode_nullReturn (/*@only@*/ lltok t)
8137{
8138 fileloc loc = lltok_getLoc (t);
8139 exprNode ret = exprNode_createLoc (ctype_unknown, fileloc_copy (loc));
8140
8141 context_returnFunction ();
8142 exprChecks_checkNullReturn (loc);
8143
8144 ret->kind = XPR_NULLRETURN;
8145 ret->edata = exprData_makeTok (t);
8146 ret->exitCode = XK_MUSTRETURN;
8147 return ret;
8148}
8149
8150exprNode exprNode_return (/*@only@*/ exprNode e)
8151{
8152 exprNode ret;
8153
8154 if (exprNode_isError (e))
8155 {
8156 ret = exprNode_createUnknown ();
8157 }
8158 else
8159 {
8160 ret = exprNode_createLoc (ctype_unknown, fileloc_copy (e->loc));
8161
8162 exprNode_checkUse (ret, e->sref, e->loc);
8163 exprNode_checkReturn (e);
8164 }
8165
8166 context_returnFunction ();
8167 ret->kind = XPR_RETURN;
8168 ret->edata = exprData_makeSingle (e);
8169 ret->exitCode = XK_MUSTRETURN;
8170
8171 return (ret);
8172}
8173
8174exprNode exprNode_comma (/*@only@*/ exprNode e1, /*@only@*/ exprNode e2)
8175{
8176 exprNode ret;
8177
8178 if (exprNode_isError (e1))
8179 {
8180 if (exprNode_isError (e2))
8181 {
7ebcc5bb 8182 ret = exprNode_createLoc (ctype_unknown, fileloc_copy (g_currentloc));
616915dd 8183 }
8184 else
8185 {
8186 ret = exprNode_createPartialCopy (e2);
8187 exprNode_checkUse (ret, e2->sref, e2->loc);
8188 ret->sref = e2->sref;
8189 }
8190 }
8191 else
8192 {
8193 ret = exprNode_createPartialCopy (e1);
8194
8195 exprNode_checkUse (ret, e1->sref, e1->loc);
8196
8197 if (!exprNode_isError (e2))
8198 {
8199 exprNode_mergeUSs (ret, e2);
8200 exprNode_checkUse (ret, e2->sref, e2->loc);
8201 ret->sref = e2->sref;
8202 }
8203 }
8204
8205 ret->kind = XPR_COMMA;
8206 ret->edata = exprData_makePair (e1, e2);
8207
8208 if (exprNode_isDefined (e1))
8209 {
8210 if (exprNode_isDefined (e2))
8211 {
8212 ret->typ = e2->typ;
8213
8214 if (exprNode_mustEscape (e1) || e1->mustBreak)
8215 {
8216 voptgenerror
8217 (FLG_UNREACHABLE,
8218 message ("Second clause of comma expression is unreachable: %s",
8219 exprNode_unparse (e2)),
8220 exprNode_loc (e2));
8221 }
8222
8223 ret->exitCode = exitkind_combine (e1->exitCode, e2->exitCode);
8224 ret->mustBreak = e1->mustBreak || e2->mustBreak;
8225 ret->canBreak = e1->canBreak || e2->canBreak;
8226 }
8227 else
8228 {
8229 if (exprNode_mustEscape (e1) || e1->mustBreak)
8230 {
8231 voptgenerror
8232 (FLG_UNREACHABLE,
8233 message ("Second clause of comma expression is unreachable: %s",
8234 exprNode_unparse (e2)),
8235 exprNode_loc (e2));
8236 }
8237
8238 ret->exitCode = e1->exitCode;
8239 ret->canBreak = e1->canBreak;
8240 }
8241 }
8242 else
8243 {
8244 if (exprNode_isDefined (e2))
8245 {
8246 ret->exitCode = e2->exitCode;
8247 ret->mustBreak = e2->mustBreak;
8248 ret->canBreak = e2->canBreak;
8249 }
8250 }
8251
8252 return (ret);
8253}
8254
8255static bool exprNode_checkOneInit (/*@notnull@*/ exprNode el, exprNode val)
8256{
8257 ctype t1 = exprNode_getType (el);
8258 ctype t2 = exprNode_getType (val);
8259 bool hasError = FALSE;
8260
146e25eb 8261 DPRINTF (("Check one init: %s / %s",
8262 exprNode_unparse (el),
8263 exprNode_unparse (val)));
8264
616915dd 8265 if (ctype_isUnknown (t1))
8266 {
8267 voptgenerror (FLG_IMPTYPE,
8268 message ("Variable has unknown (implicitly int) type: %s",
8269 exprNode_unparse (el)),
8270 el->loc);
8271
8272 t1 = ctype_int;
8273 el->typ = ctype_int;
8274 }
8275
8276 if (exprNode_isDefined (val) && val->kind == XPR_INITBLOCK)
8277 {
8278 exprNodeList vals = exprData_getArgs (val->edata);
077d4458 8279
7534721d 8280 DPRINTF (("Check one init: %s", exprNodeList_unparse (vals)));
8281 DPRINTF (("Type: %s", ctype_unparse (t1)));
8282
616915dd 8283 if (ctype_isRealAP (t1))
8284 {
8285 int i = 0;
8286 int nerrors = 0;
8287
7534721d 8288 if (ctype_isFixedArray (t1))
8289 {
37ae0b5e 8290 size_t nelements = ctype_getArraySize (t1);
7534721d 8291
077d4458 8292 DPRINTF (("Checked array: %s / %d",
8293 ctype_unparse (t1), nelements));
8294
7534721d 8295 if (exprNode_isStringLiteral (val))
8296 {
8297 exprNode_checkStringLiteralLength (t1, val);
8298 }
8299 else
8300 {
37ae0b5e 8301 if (exprNodeList_size (vals) != size_toInt (nelements))
7534721d 8302 {
8303 hasError = optgenerror
37ae0b5e 8304 (exprNodeList_size (vals) > size_toInt (nelements)
8305 ? FLG_INITSIZE : FLG_INITALLELEMENTS,
7534721d 8306 message ("Initializer block for "
8307 "%s has %d element%&, but declared as %s: %q",
8308 exprNode_unparse (el),
8309 exprNodeList_size (vals),
8310 ctype_unparse (t1),
8311 exprNodeList_unparse (vals)),
8312 val->loc);
8313 }
8314 }
8315 }
8316
616915dd 8317 exprNodeList_elements (vals, oneval)
8318 {
8319 cstring istring = message ("%d", i);
8320 exprNode newel =
8321 exprNode_arrayFetch
8322 (exprNode_fakeCopy (el),
8323 exprNode_numLiteral (ctype_int, istring,
8324 fileloc_copy (el->loc), i));
8325
8326 if (exprNode_isDefined (newel))
8327 {
8328 if (exprNodeList_size (vals) == 1
8329 && ctype_isString (exprNode_getType (oneval))
8330 && ctype_isChar (exprNode_getType (newel)))
8331 {
8332 exprNode_freeIniter (newel);
8333 }
8334 else
8335 {
8336 if (exprNode_checkOneInit (newel, oneval))
8337 {
8338 hasError = TRUE;
8339 nerrors++;
8340
8341 if (nerrors > 3 && exprNodeList_size (vals) > 6)
8342 {
8343 llgenmsg
8344 (message ("Additional initialization errors "
8345 "for %s not reported",
8346 exprNode_unparse (el)),
8347 exprNode_loc (el));
8348 exprNode_freeIniter (newel);
8349 break;
8350 }
8351 else
8352 {
8353 exprNode_freeIniter (newel);
8354 }
8355 }
8356 else
8357 {
8358 exprNode_freeIniter (newel);
8359 }
8360 }
8361 }
8362
8363 cstring_free (istring);
8364 i++;
8365 /*@-branchstate@*/
8366 } end_exprNodeList_elements;
8367 /*@=branchstate@*/
8368 }
8369 else if (ctype_isStruct (ctype_realType (t1)))
8370 {
8371 uentryList fields = ctype_getFields (t1);
8372 int i = 0;
8373
8374 if (uentryList_size (fields) != exprNodeList_size (vals))
8375 {
8376 if (uentryList_size (fields) > exprNodeList_size (vals))
8377 {
8378 hasError = optgenerror
8379 (FLG_FULLINITBLOCK,
8380 message ("Initializer block for "
28bf4b0b 8381 "%s has %d field%&, but %s has %d field%&: %q",
616915dd 8382 exprNode_unparse (el),
8383 exprNodeList_size (vals),
8384 ctype_unparse (t1),
8385 uentryList_size (fields),
8386 exprNodeList_unparse (vals)),
8387 val->loc);
8388 }
8389 else
8390 {
8391 hasError = optgenerror
8392 (FLG_TYPE,
8393 message ("Initializer block for "
28bf4b0b 8394 "%s has %d field%&, but %s has %d field%&: %q",
616915dd 8395 exprNode_unparse (el),
8396 exprNodeList_size (vals),
8397 ctype_unparse (t1),
8398 uentryList_size (fields),
8399 exprNodeList_unparse (vals)),
8400 val->loc);
8401 }
8402 }
8403 else
8404 {
8405 exprNodeList_elements (vals, oneval)
8406 {
8407 uentry thisfield = uentryList_getN (fields, i);
8408 exprNode newel =
28bf4b0b 8409 exprNode_fieldAccessAux (exprNode_fakeCopy (el),
8410 exprNode_loc (el),
8411 uentry_getName (thisfield));
616915dd 8412
8413 if (exprNode_isDefined (newel))
8414 {
8415 if (exprNode_checkOneInit (newel, oneval))
8416 {
8417 hasError = TRUE;
8418 }
8419
8420 exprNode_freeIniter (newel);
8421 }
8422
8423 i++;
8424 } end_exprNodeList_elements;
8425 }
8426 }
146e25eb 8427 /* evans 2001-12-30: added to fix bug reported by Jim Zelenka */
8428 else if (ctype_isUnion (ctype_realType (t1)))
8429 {
8430 uentryList fields = ctype_getFields (t1);
8431 int i = 0;
8432
8433 /*
8434 ** Union initializers set the first member always.
8435 */
8436
8437 DPRINTF (("Union initializer: %s / %s",
8438 exprNode_unparse (el), ctype_unparse (ctype_realType (t1))));
8439
8440 if (exprNodeList_size (vals) != 1)
8441 {
8442 hasError = optgenerror
8443 (FLG_TYPE,
8444 message ("Initializer block for union "
8445 "%s has %d elements, union initializers should have one element: %q",
8446 exprNode_unparse (el),
8447 exprNodeList_size (vals),
8448 exprNodeList_unparse (vals)),
8449 val->loc);
8450 }
8451 else
8452 {
8453 exprNode oneval = exprNodeList_head (vals);
8454 uentry thisfield = uentryList_getN (fields, i);
8455 exprNode newel =
8456 exprNode_fieldAccessAux (exprNode_fakeCopy (el),
8457 exprNode_loc (el),
8458 uentry_getName (thisfield));
8459
8460 if (exprNode_isDefined (newel))
8461 {
8462 if (exprNode_checkOneInit (newel, oneval))
8463 {
8464 hasError = TRUE;
8465 }
8466
8467 exprNode_freeIniter (newel);
8468 }
8469 }
8470 }
616915dd 8471 else
8472 {
8473 hasError = optgenerror
8474 (FLG_TYPE,
8475 message ("Initializer block used for "
8476 "%s where %t is expected: %s",
8477 exprNode_unparse (el), t1, exprNode_unparse (val)),
8478 val->loc);
8479 }
8480 }
8481 else
8482 {
8483 if (exprNode_isDefined (val))
8484 {
8485 doAssign (el, val, TRUE);
8486
8487 if (!exprNode_matchType (t1, val))
8488 {
8489 hasError = gentypeerror
8490 (t1, val, t2, el,
8491 message ("Initial value of %s is type %t, "
8492 "expects %t: %s",
8493 exprNode_unparse (el),
8494 t2, t1, exprNode_unparse (val)),
8495 val->loc);
8496 }
8497 }
8498 }
8499
8500 return hasError;
8501}
8502
abd7f895 8503static /*@notnull@*/ exprNode
28bf4b0b 8504exprNode_makeInitializationAux (/*@temp@*/ idDecl t)
8505{
8506 exprNode ret;
8507
146e25eb 8508 DPRINTF (("Initialization: %s", idDecl_unparse (t)));
8509
28bf4b0b 8510 if (usymtab_exists (idDecl_observeId (t)))
8511 {
8512 uentry ue = usymtab_lookup (idDecl_observeId (t));
8513 ret = exprNode_createId (ue);
28bf4b0b 8514 }
8515 else
8516 {
7ebcc5bb 8517 uentry ue;
8518
8519 DPRINTF (("Unrecognized: %s", idDecl_unparse (t)));
8520
8521 ue = uentry_makeUnrecognized (idDecl_observeId (t), fileloc_copy (g_currentloc));
28bf4b0b 8522 ret = exprNode_fromIdentifierAux (ue);
8523
8524 /*
8525 ** No error - this happens in old style declarations:
8526
8527 voptgenerror
8528 (FLG_UNRECOG,
8529 message ("Unrecognized identifier in intializer: %s", idDecl_observeId (t)),
8530 g_currentloc);
8531
8532 **
8533 */
8534 }
8535
8536 exprData_free (ret->edata, ret->kind);
8537 ret->edata = exprData_undefined;
8538 ret->exitCode = XK_NEVERESCAPE;
8539 ret->mustBreak = FALSE;
8540 ret->kind = XPR_INIT;
8541 return ret;
8542}
8543
8544exprNode exprNode_makeEmptyInitialization (/*@only@*/ idDecl t)
8545{
8546 exprNode ret = exprNode_makeInitializationAux (t);
8547 llassert (ret->edata == exprData_undefined);
8548 ret->edata = exprData_makeInit (t, exprNode_undefined);
8549 return ret;
8550}
8551
616915dd 8552exprNode exprNode_makeInitialization (/*@only@*/ idDecl t,
8553 /*@only@*/ exprNode e)
8554{
8555 uentry ue = usymtab_lookup (idDecl_observeId (t));
28bf4b0b 8556 exprNode ret = exprNode_makeInitializationAux (t);
8557 fileloc loc = exprNode_loc (e);
02b84d4b 8558
8559 DPRINTF (("initialization: %s = %s", idDecl_unparse (t), exprNode_unparse (e)));
8560
616915dd 8561 if (exprNode_isError (e))
8562 {
8563 e = exprNode_createUnknown ();
616915dd 8564 /* error: assume initializer is defined */
28bf4b0b 8565 sRef_setDefined (ret->sref, g_currentloc);
02b84d4b 8566 ret->edata = exprData_makeInit (t, e);
616915dd 8567 }
8568 else
8569 {
28bf4b0b 8570 ctype ct = ctype_realishType (ret->typ);
8571
616915dd 8572 /*
8573 ** evs - 9 Apr 1995
8574 **
8575 ** was addSafeUse --- what's the problem?
8576 **
8577 ** int x = 3, y = x ?
8578 */
8579
28bf4b0b 8580 exprData_free (ret->edata, ret->kind);
8581 ret->edata = exprData_makeInit (t, e);
02b84d4b 8582 DPRINTF (("ret: %s", exprNode_unparse (ret)));
28bf4b0b 8583
616915dd 8584 exprNode_checkUse (ret, e->sref, e->loc);
8585
8586 if (ctype_isUnknown (e->typ) && uentry_isValid (ue))
8587 {
8588 exprNode lhs = exprNode_createId (ue);
8589
8590 /*
8591 ** static storage should be undefined before initializing
8592 */
8593
8594 if (uentry_isStatic (ue))
8595 {
8596 sRef_setDefState (lhs->sref, SS_PARTIAL, fileloc_undefined);
8597 }
146e25eb 8598
616915dd 8599 (void) exprNode_checkOneInit (lhs, e);
8600
8601 if (uentry_isStatic (ue))
8602 {
8603 sRef_setDefState (lhs->sref, SS_DEFINED, fileloc_undefined);
8604 }
8605
8606 exprNode_free (lhs);
8607 }
8608 else
8609 {
8610 if (!exprNode_matchType (ct, e))
8611 {
8612 if (exprNode_isZero (e) && ctype_isArrayPtr (ct))
8613 {
8614 ;
8615 }
8616 else
8617 {
8618 (void) gentypeerror
8619 (exprNode_getType (e), e, exprNode_getType (ret), ret,
8620 message
28bf4b0b 8621 ("Variable %q initialized to type %t, expects %t: %s",
8622 uentry_getName (ue), exprNode_getType (e),
616915dd 8623 exprNode_getType (ret),
8624 exprNode_unparse (e)),
8625 e->loc);
8626 }
8627 }
8628 }
8629
8630 if (uentry_isStatic (ue))
8631 {
8632 sRef_setDefState (ret->sref, SS_PARTIAL, fileloc_undefined);
8633 }
37ae0b5e 8634
02b84d4b 8635 if (exprNode_isStringLiteral (e)
8636 && (ctype_isArray (ct))
8637 && (ctype_isChar (ctype_realType (ctype_baseArrayPtr (ct)))))
8638 {
8639 /*
8640 ** If t is a char [], the literal is copied.
8641 */
8642
37ae0b5e 8643 exprNode_checkStringLiteralLength (ct, e);
8644 sRef_setDefState (ret->sref, SS_DEFINED, e->loc);
8645 ret->val = multiVal_copy (e->val);
616915dd 8646
37ae0b5e 8647 sRef_setNullTerminatedState (ret->sref);
8648
02b84d4b 8649 if (multiVal_isDefined (e->val))
8650 {
37ae0b5e 8651 cstring slit = multiVal_forceString (e->val);
e5081f8c 8652 sRef_setLen (ret->sref, size_toInt (cstring_length (slit) + 1));
02b84d4b 8653 }
8654
37ae0b5e 8655 if (ctype_isFixedArray (ct))
02b84d4b 8656 {
37ae0b5e 8657 sRef_setSize (ret->sref, size_toInt (ctype_getArraySize (ct)));
02b84d4b 8658 }
8659 }
8660 else
02b84d4b 8661 {
8662 doAssign (ret, e, TRUE);
8663 }
616915dd 8664
8665 if (uentry_isStatic (ue))
8666 {
8667 sRef_setDefState (ret->sref, SS_DEFINED, fileloc_undefined);
8668 }
8669 }
02b84d4b 8670
616915dd 8671 if (context_inIterDef ())
8672 {
8673 /* should check if it is yield */
8674 uentry_setUsed (ue, loc);
8675 }
8676 else
8677 {
28bf4b0b 8678 ;
616915dd 8679 }
8680
616915dd 8681 exprNode_mergeUSs (ret, e);
02b84d4b 8682 DPRINTF (("Ret: %s %p %p",
8683 exprNode_unparse (ret),
8684 ret->requiresConstraints,
8685 ret->ensuresConstraints));
8686
8687 DPRINTF (("Ret: %s %s %s",
8688 exprNode_unparse (ret),
8689 constraintList_unparse (ret->requiresConstraints),
8690 constraintList_unparse (ret->ensuresConstraints)));
616915dd 8691 return ret;
8692}
8693
8694exprNode exprNode_iter (/*@observer@*/ uentry name,
8695 /*@only@*/ exprNodeList alist,
8696 /*@only@*/ exprNode body,
8697 /*@observer@*/ uentry end)
8698{
8699 exprNode ret;
8700 cstring iname;
8701
8702 llassert (uentry_isValid (name));
8703
8704 uentry_setUsed (name, exprNode_loc (body));
8705
8706 ret = exprNode_createPartialCopy (body);
8707 iname = uentry_getName (name);
8708
8709 if (uentry_isInvalid (end))
8710 {
bb7c2085 8711 llerror (FLG_ITERBALANCE,
616915dd 8712 message ("Iter %s not balanced with end_%s", iname, iname));
8713 }
8714 else
8715 {
8716 cstring ename = uentry_getName (end);
8717
68de3f33 8718 if (!cstring_equalPrefixLit (ename, "end_"))
616915dd 8719 {
bb7c2085 8720 llerror (FLG_ITERBALANCE, message ("Iter %s not balanced with end_%s: %s",
616915dd 8721 iname, iname, ename));
8722 }
8723 else
8724 {
8725 if (!cstring_equal (iname, cstring_suffix (ename, 4)))
8726 {
bb7c2085 8727 llerror (FLG_ITERBALANCE,
616915dd 8728 message ("Iter %s not balanced with end_%s: %s",
8729 iname, iname, ename));
8730 }
8731 }
8732
8733 cstring_free (ename);
8734 }
8735
8736 context_exitIterClause (body);
8737
8738 ret->kind = XPR_ITER;
8739 ret->edata = exprData_makeIter (name, alist, body, end);
8740
8741 if (uentry_isIter (name))
8742 {
8743 (void) checkArgsReal (name, body,
8744 uentry_getParams (name), alist, TRUE, ret);
8745 }
8746
8747 cstring_free (iname);
8748
8749 return ret;
8750}
8751
8752exprNode
8753exprNode_iterNewId (/*@only@*/ cstring s)
8754{
8755 exprNode e = exprNode_new ();
8756 uentry ue = uentryList_getN (uentry_getParams (getCurrentIter ()), iterParamNo ());
8757
8758 llassert (processingIterVars ());
8759
8760 e->loc = context_getSaveLocation ();
8761
8762 if (fileloc_isUndefined (e->loc))
8763 {
8764 fileloc_free (e->loc);
8765 e->loc = fileloc_copy (g_currentloc);
8766 }
8767
8768 e->uses = sRefSet_new ();
8769 e->sets = sRefSet_new ();
8770 e->msets = sRefSet_new ();
8771 e->kind = XPR_VAR;
8772 e->val = multiVal_unknown ();
8773 e->guards = guardSet_new ();
02b84d4b 8774 e->sref = sRef_undefined;
616915dd 8775 e->isJumpPoint = FALSE;
8776 e->exitCode = XK_NEVERESCAPE;
8777
1b8ae690 8778 /*> missing fields, detected by splint <*/
616915dd 8779 e->canBreak = FALSE;
8780 e->mustBreak = FALSE;
8781 e->etext = cstring_undefined;
8782
8783 if (uentry_isYield (ue))
8784 {
8785 uentry uue = uentry_makeVariable (s, uentry_getType (ue),
8786 fileloc_copy (e->loc),
8787 FALSE);
8788 sRef sr;
8789
8790 uue = usymtab_supEntrySrefReturn (uue);
8791
8792 sr = uentry_getSref (uue);
8793 sRef_mergeStateQuiet (sr, uentry_getSref (ue));
8794 sr = uentry_getSref (uue);
8795 sRef_setDefined (sr, e->loc);
8796
8797 e->typ = uentry_getType (uue);
8798 e->sref = sr;
8799 e->edata = exprData_makeId (uue);
8800 uentry_setUsed (uue, g_currentloc);
8801 }
8802 else
8803 {
8804 uentry uue;
8805
8806 sRef_setGlobalScope ();
8807 uue = uentry_makeVariableLoc (s, ctype_unknown);
8808
8809 e->typ = ctype_unknown;
8810 e->edata = exprData_makeId (uue);
8811
8812 uentry_setUsed (uue, e->loc);
8813 uentry_setHasNameError (uue);
8814
8815 if (context_getFlag (FLG_REPEATUNRECOG))
8816 {
8817 uentry_markOwned (uue);
8818 }
8819 else
8820 {
8821 usymtab_supGlobalEntry (uue);
8822 }
8823
8824 sRef_clearGlobalScope ();
8825
8826 voptgenerror (FLG_UNRECOG, message ("Unrecognized identifier: %s", s),
8827 e->loc);
8828 }
8829
8830
8831 cstring_free (s);
84c9ffbf 8832
8833 exprNode_defineConstraints(e);
616915dd 8834 return (e);
8835}
8836
8837exprNode
8838exprNode_iterExpr (/*@returned@*/ exprNode e)
8839{
8840 if (!processingIterVars ())
8841 {
8842 llcontbuglit ("checkIterParam: not in iter");
8843 return e;
8844 }
8845
8846 if (uentry_isYield (uentryList_getN (uentry_getParams (getCurrentIter ()),
8847 iterParamNo ())))
8848 {
8849 if (exprNode_isDefined (e))
8850 {
8851 if (fileloc_isDefined (e->loc))
8852 {
8853 voptgenerror
bb7c2085 8854 (FLG_ITERYIELD,
616915dd 8855 message ("Yield parameter is not simple identifier: %s",
8856 exprNode_unparse (e)),
8857 e->loc);
8858 }
8859 else
8860 {
8861 voptgenerror
bb7c2085 8862 (FLG_ITERYIELD,
616915dd 8863 message ("Yield parameter is not simple identifier: %s",
8864 exprNode_unparse (e)),
8865 g_currentloc);
8866
8867 }
8868 }
8869 }
8870 return e;
8871}
8872
8873exprNode
8874exprNode_iterId (/*@observer@*/ uentry c)
8875{
8876 uentry ue;
8877
8878 llassert (processingIterVars ());
8879
8880 ue = uentryList_getN (uentry_getParams (getCurrentIter ()),
8881 iterParamNo ());
8882
8883 if (uentry_isYield (ue))
8884 {
8885 ctype ct = uentry_getType (ue);
8886 exprNode e = exprNode_createPlain (ct);
8887 cstring name = uentry_getName (c);
8888 uentry le = uentry_makeVariable (name, ct, fileloc_undefined, FALSE);
8889
8890 uentry_setUsed (ue, g_currentloc);
8891 uentry_setHasNameError (ue);
8892
8893 cstring_free (name);
8894
8895 e->kind = XPR_VAR;
8896 e->edata = exprData_makeId (le);
8897 e->loc = context_getSaveLocation ();
8898 e->sref = uentry_getSref (le);
8899
8900 usymtab_supEntrySref (le);
8901
8902 if (!context_inHeader ())
8903 {
8904 if (optgenerror
bb7c2085 8905 (FLG_ITERYIELD,
616915dd 8906 message ("Yield parameter shadows local declaration: %q",
8907 uentry_getName (c)),
8908 fileloc_isDefined (e->loc) ? e->loc : g_currentloc))
8909 {
8910 uentry_showWhereDeclared (c);
8911 }
8912 }
8913
8914 return e;
8915 }
8916
8917 return (exprNode_fromIdentifierAux (c));
8918}
8919
8920exprNode exprNode_iterStart (/*@observer@*/ uentry name, /*@only@*/ exprNodeList alist)
8921{
8922 exprNode ret = exprNode_create (ctype_unknown);
8923
8924 ret->kind = XPR_ITERCALL;
8925 ret->edata = exprData_makeIterCall (name, alist);
8926
8927 if (uentry_isIter (name))
8928 {
8929 uentryList params = uentry_getParams (name);
8930
8931 if (context_inIterDef ()
8932 && uentryList_size (params) == exprNodeList_size (alist))
8933 {
8934 int i = 0;
8935
8936 exprNodeList_elements (alist, arg)
8937 {
8938 uentry parg = uentryList_getN (params, i);
8939
8940 if (uentry_isYield (parg))
8941 {
8942 uentry ue = exprNode_getUentry (arg);
8943
8944 if (uentry_isValid (ue))
8945 {
8946 ;
8947 }
8948 }
8949
8950 i++;
8951 } end_exprNodeList_elements;
8952 }
8953
8954 (void) checkArgsReal (name, ret, params, alist, TRUE, ret);
8955 checkUnspecCall (ret, params, alist);
8956 }
8957
8958 return ret;
8959}
8960
8961/*@exposed@*/ sRef exprNode_getSref (exprNode e)
8962{
8963 if (exprNode_isDefined (e))
8964 {
02b84d4b 8965 if (sRef_isInvalid (e->sref))
616915dd 8966 {
8967 /*@-mods@*/
8968 e->sref = sRef_makeUnknown ();
8969 sRef_setAliasKind (e->sref, AK_ERROR, fileloc_undefined);
8970 /*@=mods@*/
8971 return e->sref;
8972 }
8973 else
8974 {
8975 return e->sref;
8976 }
8977 }
8978 else
8979 {
8980 return sRef_undefined;
8981 }
8982}
8983
8984/*@observer@*/ cstring
8985exprNode_unparseFirst (exprNode e)
8986{
8987 if (exprNode_isDefined (e))
8988 {
8989 cstring ret;
8990
8991 if (e->kind == XPR_STMTLIST
8992 || e->kind == XPR_COMMA || e->kind == XPR_COND)
8993 {
8994 exprNode first = exprData_getPairA (e->edata);
8995
8996 if (exprNode_isDefined (first))
8997 {
8998 return (exprNode_unparseFirst (exprData_getPairA (e->edata)));
8999 }
9000 else
9001 {
9002 return (cstring_makeLiteralTemp ("..."));
9003 }
9004 }
9005
9006 ret = cstring_elide (exprNode_unparse (e), 20);
9007 cstring_markOwned (ret);
9008
9009 return (ret);
9010 }
9011 else
9012 {
9013 return cstring_makeLiteralTemp ("<error>");
9014 }
9015}
9016
9017/*@observer@*/ cstring
28bf4b0b 9018exprNode_unparse (/*@temp@*/ exprNode e)
616915dd 9019{
9020 if (exprNode_isError (e))
9021 {
9022 return cstring_makeLiteralTemp ("<error>");
9023 }
9024
9025 if (cstring_isDefined (e->etext))
9026 {
9027 return e->etext;
9028 }
9029 else
9030 {
9031 cstring ret = exprNode_doUnparse (e);
9032
9033 /*@-modifies@*/ /* benevolent */
9034 e->etext = ret;
9035 /*@=modifies@*/
9036 return ret;
9037 }
9038}
9039
9040/*@observer@*/ fileloc
9041exprNode_loc (exprNode e)
9042{
9043 if (exprNode_isError (e))
9044 {
9045 return (g_currentloc);
9046 }
9047 else
9048 {
9049 return (e->loc);
9050 }
9051}
9052
9053/*
9054** executes exprNode e
9055** recursively rexecutes as though in original parse using
9056** information in e->edata
9057*/
9058
9059static /*@only@*/ exprNodeList exprNodeList_effect (exprNodeList e)
9060{
9061 exprNodeList ret = exprNodeList_new ();
9062
9063 exprNodeList_elements (e, current)
9064 {
9065 exprNodeList_addh (ret, exprNode_effect (current));
9066 } end_exprNodeList_elements;
9067
9068 return ret;
9069}
9070
9071static /*@only@*/ exprNode exprNode_effect (exprNode e)
9072 /*@globals internalState@*/
9073{
9074 bool innerEffect = inEffect;
9075 exprNode ret;
9076 exprData data;
9077
9078 inEffect = TRUE;
9079
9080 context_clearJustPopped ();
9081
9082 if (exprNode_isError (e))
9083 {
9084 ret = exprNode_undefined;
9085 }
9086 else
9087 {
9088 /*
9089 ** Turn off expose and dependent transfer checking.
9090 ** Need to pass exposed internal nodes,
9091 ** [ copying would be a waste! ]
9092 ** [ Actually, I think I wasted a lot more time than its worth ]
9093 ** [ trying to do this. ]
9094 */
9095
9096 /*@-exposetrans@*/
9097 /*@-observertrans@*/
9098 /*@-dependenttrans@*/
9099
9100 data = e->edata;
9101
9102 switch (e->kind)
9103 {
9104 case XPR_PARENS:
9105 ret = exprNode_addParens (exprData_getUopTok (data),
9106 exprNode_effect (exprData_getUopNode (data)));
9107 break;
9108 case XPR_ASSIGN:
9109 ret = exprNode_assign (exprNode_effect (exprData_getOpA (data)),
9110 exprNode_effect (exprData_getOpB (data)),
9111 exprData_getOpTok (data));
9112 break;
9113 case XPR_INITBLOCK:
9114 ret = exprNode_undefined;
9115 break;
9116 case XPR_CALL:
9117 ret = exprNode_functionCall (exprNode_effect (exprData_getFcn (data)),
9118 exprNodeList_effect (exprData_getArgs (data)));
9119 break;
9120 case XPR_EMPTY:
9121 ret = e;
9122 break;
9123
9124 case XPR_LABEL:
9125 ret = e;
9126 break;
9127
9128 case XPR_CONST:
9129 case XPR_VAR:
9130 {
9131 cstring id = exprData_getId (data);
9132 uentry ue = usymtab_lookupSafe (id);
9133
9134 ret = exprNode_fromIdentifierAux (ue);
9135 ret->loc = fileloc_update (ret->loc, e->loc);
9136 break;
9137 }
9138 case XPR_BODY:
9139 ret = e;
9140 break;
9141 case XPR_FETCH:
9142 ret = exprNode_arrayFetch (exprNode_effect (exprData_getPairA (data)),
9143 exprNode_effect (exprData_getPairB (data)));
9144 break;
9145 case XPR_OP:
52e90c0f 9146 /*
9147 ** evans 2002-03-15: for && and ||, need to do the guards also
9148 ** this is what cgrammar.y does - should be
9149 ** able to avoid duplication, but need to
9150 ** time with grammar productions.
9151 */
9152
9153 DPRINTF (("Effect: %s", exprNode_unparse (e)));
9154
9155 if (lltok_getTok (exprData_getOpTok (data)) == AND_OP)
9156 {
9157 exprNode e1 = exprNode_effect (exprData_getOpA (data));
9158 exprNode e2;
9159 exprNode_produceGuards (e1);
9160 context_enterAndClause (e1);
9161 e2 = exprNode_effect (exprData_getOpB (data));
9162
9163 ret = exprNode_op (e1, e2,
9164 exprData_getOpTok (data));
9165
9166 context_exitAndClause (ret, e2);
9167 }
9168 else if (lltok_getTok (exprData_getOpTok (data)) == OR_OP)
9169 {
9170 exprNode e1 = exprNode_effect (exprData_getOpA (data));
9171 exprNode e2;
9172 exprNode_produceGuards (e1);
9173 context_enterOrClause (e1);
9174 e2 = exprNode_effect (exprData_getOpB (data));
9175
9176 ret = exprNode_op (e1, e2,
9177 exprData_getOpTok (data));
9178
9179 context_exitOrClause (ret, e2);
9180 }
9181 else
9182 {
9183 ret = exprNode_op (exprNode_effect (exprData_getOpA (data)),
9184 exprNode_effect (exprData_getOpB (data)),
9185 exprData_getOpTok (data));
9186 }
616915dd 9187 break;
9188
9189 case XPR_POSTOP:
9190 ret = exprNode_postOp (exprNode_effect (exprData_getUopNode (data)),
9191 exprData_getUopTok (data));
9192 break;
9193 case XPR_PREOP:
9194 ret = exprNode_preOp (exprNode_effect (exprData_getUopNode (data)),
9195 exprData_getUopTok (data));
9196 break;
9197
9198 case XPR_OFFSETOF:
9199 case XPR_SIZEOFT:
9200 case XPR_SIZEOF:
9201 case XPR_ALIGNOFT:
9202 case XPR_ALIGNOF:
9203 ret = e;
9204 break;
9205
9206 case XPR_VAARG:
9207 ret = exprNode_vaArg (exprData_getCastTok (data),
9208 exprNode_effect (exprData_getCastNode (data)),
9209 exprData_getCastType (data));
9210 break;
9211
9212 case XPR_CAST:
9213 ret = exprNode_cast (exprData_getCastTok (data),
9214 exprNode_effect (exprData_getCastNode (data)),
9215 exprData_getCastType (data));
9216 break;
9217 case XPR_ITERCALL:
9218 ret = exprNode_iterStart (exprData_getIterCallIter (data),
9219 exprNodeList_effect
9220 (exprData_getIterCallArgs (data)));
9221 break;
9222
9223 case XPR_ITER:
9224 ret = exprNode_iter (exprData_getIterSname (data),
9225 exprNodeList_effect (exprData_getIterAlist (data)),
9226 exprNode_effect (exprData_getIterBody (data)),
9227 exprData_getIterEname (data));
9228 break;
9229
9230 case XPR_FOR:
9231 ret = exprNode_for (exprNode_effect (exprData_getPairA (data)),
9232 exprNode_effect (exprData_getPairB (data)));
9233 break;
9234
9235 case XPR_FORPRED:
9236 ret = exprNode_forPred (exprNode_effect (exprData_getTripleInit (data)),
9237 exprNode_effect (exprData_getTripleTest (data)),
9238 exprNode_effect (exprData_getTripleInc (data)));
9239 break;
9240
9241 case XPR_TOK:
9242 ret = exprNode_createTok (exprData_getTok (data));
9243 break;
9244
9245 case XPR_GOTO:
9246 ret = exprNode_goto (exprData_getLiteral (data));
9247 ret->loc = fileloc_update (ret->loc, e->loc);
9248 break;
9249
9250 case XPR_CONTINUE:
9251 ret = exprNode_continue (exprData_getTok (data), QSAFEBREAK);
9252 break;
9253
9254 case XPR_BREAK:
9255 ret = exprNode_break (exprData_getTok (data), QSAFEBREAK);
9256 break;
9257
9258 case XPR_RETURN:
9259 ret = exprNode_return (exprNode_effect (exprData_getSingle (data)));
9260 break;
9261
9262 case XPR_NULLRETURN:
9263 ret = exprNode_nullReturn (exprData_getTok (data));
9264 break;
9265
9266 case XPR_COMMA:
9267 ret = exprNode_comma (exprNode_effect (exprData_getPairA (data)),
9268 exprNode_effect (exprData_getPairB (data)));
9269 break;
9270
9271 case XPR_COND:
9272 ret = exprNode_cond (exprNode_effect (exprData_getTriplePred (data)),
9273 exprNode_effect (exprData_getTripleTrue (data)),
9274 exprNode_effect (exprData_getTripleFalse (data)));
9275 break;
9276 case XPR_IF:
9277 ret = exprNode_if (exprNode_effect (exprData_getPairA (data)),
9278 exprNode_effect (exprData_getPairB (data)));
9279 break;
9280
9281 case XPR_IFELSE:
9282 ret = exprNode_ifelse (exprNode_effect (exprData_getTriplePred (data)),
9283 exprNode_effect (exprData_getTripleTrue (data)),
9284 exprNode_effect (exprData_getTripleFalse (data)));
9285 break;
9286 case XPR_WHILEPRED:
9287 ret = exprNode_whilePred (exprData_getSingle (data));
9288 break;
9289
9290 case XPR_WHILE:
9291 ret = exprNode_while (exprNode_effect (exprData_getPairA (data)),
9292 exprNode_effect (exprData_getPairB (data)));
9293 break;
9294
9295 case XPR_DOWHILE:
9296 ret = exprNode_doWhile (exprNode_effect (exprData_getPairA (data)),
9297 exprNode_effect (exprData_getPairB (data)));
9298 break;
9299
9300 case XPR_BLOCK:
9301 ret = exprNode_makeBlock (exprNode_effect (exprData_getSingle (data)));
9302 break;
9303
9304 case XPR_STMT:
9305 ret = exprNode_statement (exprNode_effect (exprData_getUopNode (data)),
9306 exprData_getUopTok (data));
9307 break;
9308
9309 case XPR_STMTLIST:
9310 ret = exprNode_concat (exprNode_effect (exprData_getPairA (data)),
9311 exprNode_effect (exprData_getPairB (data)));
9312 break;
9313
9314 case XPR_FTCASE:
9315 case XPR_CASE:
9316 ret = exprNode_caseMarker
9317 (exprNode_effect (exprData_getSingle (data)),
9318 TRUE);
9319 break;
9320
9321 case XPR_FTDEFAULT:
9322 case XPR_DEFAULT:
9323 ret = exprNode_createTok (exprData_getTok (data));
9324 break;
9325
9326 case XPR_SWITCH:
9327 ret = exprNode_switch (exprNode_effect (exprData_getPairA (data)),
9328 exprNode_effect (exprData_getPairB (data)));
9329 break;
9330
9331 case XPR_INIT:
9332 ret = exprNode_makeInitialization
9333 (exprData_getInitId (data),
9334 exprNode_effect (exprData_getInitNode (data)));
9335 break;
9336
9337 case XPR_FACCESS:
28bf4b0b 9338 ret = exprNode_fieldAccessAux
9339 (exprNode_effect (exprData_getFieldNode (data)),
9340 exprNode_loc (exprData_getFieldNode (data)),
9341 cstring_copy (exprData_getFieldName (data)));
616915dd 9342 break;
9343
9344 case XPR_ARROW:
28bf4b0b 9345 ret = exprNode_arrowAccessAux
9346 (exprNode_effect (exprData_getFieldNode (data)),
9347 exprNode_loc (exprData_getFieldNode (data)),
9348 cstring_copy (exprData_getFieldName (data)));
616915dd 9349 break;
9350
9351 case XPR_STRINGLITERAL:
9352 ret = e;
9353 break;
9354
9355 case XPR_NUMLIT:
9356 ret = e;
9357 break;
9358
9359 case XPR_NODE:
9360 ret = e;
9361 break;
9362 /*@-branchstate@*/
9363 }
9364 /*@=branchstate@*/
9365 /*@=observertrans@*/
9366 /*@=exposetrans@*/
9367 /*@=dependenttrans@*/
9368 }
9369
9370 if (!innerEffect)
9371 {
9372 inEffect = FALSE;
9373 }
9374
9375 return ret;
9376}
9377
9378static /*@observer@*/ cstring exprNode_rootVarName (exprNode e)
9379{
9380 cstring ret;
9381 exprData data;
9382
9383 if (exprNode_isError (e))
9384 {
9385 return cstring_undefined;
9386 }
9387
9388 data = e->edata;
9389
9390 switch (e->kind)
9391 {
9392 case XPR_PARENS:
9393 ret = exprNode_rootVarName (exprData_getUopNode (data));
9394 break;
9395 case XPR_ASSIGN:
9396 ret = exprNode_rootVarName (exprData_getOpA (data));
9397 break;
9398 case XPR_CONST:
9399 case XPR_VAR:
9400 ret = exprData_getId (data);
9401 break;
e83c79ec 9402 case XPR_INIT:
9403 ret = idDecl_getName (exprData_getInitId (data));
9404 break;
616915dd 9405 case XPR_LABEL:
9406 case XPR_TOK:
9407 case XPR_ITERCALL:
9408 case XPR_EMPTY:
9409 case XPR_CALL:
9410 case XPR_INITBLOCK:
9411 case XPR_BODY:
9412 case XPR_FETCH:
9413 case XPR_OP:
9414 case XPR_POSTOP:
9415 case XPR_PREOP:
9416 case XPR_OFFSETOF:
9417 case XPR_ALIGNOFT:
9418 case XPR_ALIGNOF:
9419 case XPR_SIZEOFT:
9420 case XPR_SIZEOF:
9421 case XPR_VAARG:
9422 case XPR_CAST:
9423 case XPR_ITER:
9424 case XPR_FOR:
9425 case XPR_FORPRED:
9426 case XPR_BREAK:
9427 case XPR_RETURN:
9428 case XPR_NULLRETURN:
9429 case XPR_COMMA:
9430 case XPR_COND:
9431 case XPR_IF:
9432 case XPR_IFELSE:
9433 case XPR_WHILE:
9434 case XPR_WHILEPRED:
9435 case XPR_DOWHILE:
9436 case XPR_GOTO:
9437 case XPR_CONTINUE:
9438 case XPR_FTDEFAULT:
9439 case XPR_DEFAULT:
9440 case XPR_SWITCH:
9441 case XPR_FTCASE:
9442 case XPR_CASE:
9443 case XPR_BLOCK:
9444 case XPR_STMT:
9445 case XPR_STMTLIST:
616915dd 9446 case XPR_FACCESS:
9447 case XPR_ARROW:
9448 case XPR_NODE:
9449 case XPR_NUMLIT:
9450 case XPR_STRINGLITERAL:
9451 ret = cstring_undefined;
9452 break;
9453 }
9454
9455 return ret;
9456}
9457
616915dd 9458static /*@only@*/ cstring exprNode_doUnparse (exprNode e)
9459{
9460 cstring ret;
9461 exprData data;
9462
9463 if (exprNode_isError (e))
9464 {
9465 static /*@only@*/ cstring error = cstring_undefined;
9466
9467 if (!cstring_isDefined (error))
9468 {
9469 error = cstring_makeLiteral ("<error>");
9470 }
9471
9472 return error;
9473 }
9474
9475 data = e->edata;
9476
9477 switch (e->kind)
9478 {
9479 case XPR_PARENS:
9480 ret = message ("(%s)", exprNode_unparse (exprData_getUopNode (e->edata)));
9481 break;
9482 case XPR_ASSIGN:
9483 ret = message ("%s %s %s",
9484 exprNode_unparse (exprData_getOpA (data)),
9485 lltok_unparse (exprData_getOpTok (data)),
9486 exprNode_unparse (exprData_getOpB (data)));
9487 break;
9488 case XPR_CALL:
9489 ret = message ("%s(%q)",
9490 exprNode_unparse (exprData_getFcn (data)),
9491 exprNodeList_unparse (exprData_getArgs (data)));
9492 break;
9493 case XPR_INITBLOCK:
9494 ret = message ("{ %q }", exprNodeList_unparse (exprData_getArgs (data)));
9495 break;
9496 case XPR_EMPTY:
9497 ret = cstring_undefined;
9498 break;
9499 case XPR_LABEL:
9500 ret = message ("%s:", exprData_getId (data));
9501 break;
9502 case XPR_CONST:
9503 case XPR_VAR:
9504 ret = cstring_copy (exprData_getId (data));
9505 break;
9506 case XPR_FETCH:
9507 ret = message ("%s[%s]", exprNode_unparse (exprData_getPairA (data)),
9508 exprNode_unparse (exprData_getPairB (data)));
9509 break;
9510 case XPR_BODY:
9511 ret = message ("<body>");
9512 break;
9513 case XPR_OP:
9514 ret = message ("%s %s %s",
9515 exprNode_unparse (exprData_getOpA (data)),
9516 lltok_unparse (exprData_getOpTok (data)),
9517 exprNode_unparse (exprData_getOpB (data)));
9518 break;
9519
9520 case XPR_PREOP:
9521 ret = message ("%s%s",
9522 lltok_unparse (exprData_getUopTok (data)),
9523 exprNode_unparse (exprData_getUopNode (data)));
9524 break;
9525
9526 case XPR_POSTOP:
9527 ret = message ("%s%s",
9528 exprNode_unparse (exprData_getUopNode (data)),
9529 lltok_unparse (exprData_getUopTok (data)));
9530 break;
9531
9532 case XPR_OFFSETOF:
9533 ret = message ("offsetof(%s,%q)",
9534 ctype_unparse (qtype_getType (exprData_getOffsetType (data))),
9535 cstringList_unparseSep (exprData_getOffsetName (data), cstring_makeLiteralTemp (".")));
9536 break;
9537
9538 case XPR_SIZEOFT:
9539 ret = message ("sizeof(%s)", ctype_unparse (qtype_getType (exprData_getType (data))));
9540 break;
9541
9542 case XPR_SIZEOF:
9543 ret = message ("sizeof(%s)", exprNode_unparse (exprData_getSingle (data)));
9544 break;
9545
9546 case XPR_ALIGNOFT:
9547 ret = message ("alignof(%s)", ctype_unparse (qtype_getType (exprData_getType (data))));
9548 break;
9549
9550 case XPR_ALIGNOF:
9551 ret = message ("alignof(%s)", exprNode_unparse (exprData_getSingle (data)));
9552 break;
9553
9554 case XPR_VAARG:
9555 ret = message ("va_arg(%s, %q)",
9556 exprNode_unparse (exprData_getCastNode (data)),
9557 qtype_unparse (exprData_getCastType (data)));
9558 break;
9559
9560 case XPR_ITERCALL:
9561 ret = message ("%q(%q)",
9562 uentry_getName (exprData_getIterCallIter (data)),
9563 exprNodeList_unparse (exprData_getIterCallArgs (data)));
9564 break;
9565 case XPR_ITER:
9566 ret = message ("%q(%q) %s %q",
9567 uentry_getName (exprData_getIterSname (data)),
9568 exprNodeList_unparse (exprData_getIterAlist (data)),
9569 exprNode_unparse (exprData_getIterBody (data)),
9570 uentry_getName (exprData_getIterEname (data)));
9571 break;
9572 case XPR_CAST:
9573 ret = message ("(%q)%s",
9574 qtype_unparse (exprData_getCastType (data)),
9575 exprNode_unparse (exprData_getCastNode (data)));
9576 break;
9577
9578 case XPR_FOR:
9579 ret = message ("%s %s",
9580 exprNode_unparse (exprData_getPairA (data)),
9581 exprNode_unparse (exprData_getPairB (data)));
9582 break;
9583
9584 case XPR_FORPRED:
9585 ret = message ("for (%s; %s; %s)",
9586 exprNode_unparse (exprData_getTripleInit (data)),
9587 exprNode_unparse (exprData_getTripleTest (data)),
9588 exprNode_unparse (exprData_getTripleInc (data)));
9589 break;
9590
9591 case XPR_GOTO:
9592 ret = message ("goto %s", exprData_getLiteral (data));
9593 break;
9594
9595 case XPR_CONTINUE:
9596 ret = cstring_makeLiteral ("continue");
9597 break;
9598
9599 case XPR_BREAK:
9600 ret = cstring_makeLiteral ("break");
9601 break;
9602
9603 case XPR_RETURN:
9604 ret = message ("return %s", exprNode_unparse (exprData_getSingle (data)));
9605 break;
9606
9607 case XPR_NULLRETURN:
9608 ret = cstring_makeLiteral ("return");
9609 break;
9610
9611 case XPR_COMMA:
9612 ret = message ("%s, %s",
9613 exprNode_unparse (exprData_getPairA (data)),
9614 exprNode_unparse (exprData_getPairB (data)));
9615 break;
9616
9617 case XPR_COND:
9618 ret = message ("%s ? %s : %s",
9619 exprNode_unparse (exprData_getTriplePred (data)),
9620 exprNode_unparse (exprData_getTripleTrue (data)),
9621 exprNode_unparse (exprData_getTripleFalse (data)));
9622 break;
9623 case XPR_IF:
9624 ret = message ("if (%s) %s",
9625 exprNode_unparse (exprData_getPairA (data)),
9626 exprNode_unparse (exprData_getPairB (data)));
9627 break;
9628
9629 case XPR_IFELSE:
9630 ret = message ("if (%s) %s else %s",
9631 exprNode_unparse (exprData_getTriplePred (data)),
9632 exprNode_unparse (exprData_getTripleTrue (data)),
9633 exprNode_unparse (exprData_getTripleFalse (data)));
9634 break;
9635 case XPR_WHILE:
9636 ret = message ("while (%s) %s",
9637 exprNode_unparse (exprData_getPairA (data)),
9638 exprNode_unparse (exprData_getPairB (data)));
9639 break;
9640
9641 case XPR_WHILEPRED:
9642 ret = cstring_copy (exprNode_unparse (exprData_getSingle (data)));
9643 break;
9644
9645 case XPR_TOK:
9646 ret = cstring_copy (lltok_unparse (exprData_getTok (data)));
9647 break;
9648
9649 case XPR_DOWHILE:
9650 ret = message ("do { %s } while (%s)",
9651 exprNode_unparse (exprData_getPairB (data)),
9652 exprNode_unparse (exprData_getPairA (data)));
9653 break;
9654
9655 case XPR_BLOCK:
abd7f895 9656 ret = message ("{ %s }", exprNode_unparse (exprData_getSingle (data)));
9657 /* evans 2002-02-20 was unparseFirst! */
616915dd 9658 break;
9659
9660 case XPR_STMT:
abd7f895 9661 ret = message ("%s;", exprNode_unparse (exprData_getUopNode (data)));
616915dd 9662 break;
9663
9664 case XPR_STMTLIST:
abd7f895 9665 if (exprNode_isStatement (exprData_getPairA (data)))
9666 {
9667 /*
9668 ** statement expressions already print the ;
9669 */
9670
9671 ret = message ("%s %s",
9672 exprNode_unparse (exprData_getPairA (data)),
9673 exprNode_unparse (exprData_getPairB (data)));
9674 }
9675 else
9676 {
9677 ret = message ("%s; %s",
9678 exprNode_unparse (exprData_getPairA (data)),
9679 exprNode_unparse (exprData_getPairB (data)));
9680 }
616915dd 9681 break;
9682
9683 case XPR_FTDEFAULT:
9684 case XPR_DEFAULT:
9685 ret = cstring_makeLiteral ("default:");
9686 break;
9687
9688 case XPR_SWITCH:
9689 ret = message ("switch (%s) %s",
9690 exprNode_unparse (exprData_getPairA (data)),
9691 exprNode_unparse (exprData_getPairB (data)));
9692 break;
9693
9694 case XPR_FTCASE:
9695 case XPR_CASE:
9696 ret = message ("case %s:",
9697 exprNode_unparse (exprData_getSingle (data)));
9698 break;
9699
9700 case XPR_INIT:
28bf4b0b 9701 if (exprNode_isError (exprData_getInitNode (data)))
9702 {
9703 ret = message ("%q", idDecl_unparseC (exprData_getInitId (data)));
9704 }
9705 else
9706 {
9707 ret = message ("%q = %s",
9708 idDecl_unparseC (exprData_getInitId (data)),
9709 exprNode_unparse (exprData_getInitNode (data)));
9710 }
616915dd 9711 break;
9712
9713 case XPR_FACCESS:
9714 ret = message ("%s.%s",
9715 exprNode_unparse (exprData_getFieldNode (data)),
9716 exprData_getFieldName (data));
9717 break;
9718
9719 case XPR_ARROW:
9720 ret = message ("%s->%s",
9721 exprNode_unparse (exprData_getFieldNode (data)),
9722 exprData_getFieldName (data));
9723 break;
9724
9725 case XPR_STRINGLITERAL:
e0b363ad 9726 if (ctype_isWideString (e->typ))
9727 {
9728 ret = message ("L\"%s\"", exprData_getLiteral (data));
9729 }
9730 else
9731 {
9732 ret = message ("\"%s\"", exprData_getLiteral (data));
9733 }
616915dd 9734 break;
9735
9736 case XPR_NUMLIT:
9737 ret = cstring_copy (exprData_getLiteral (data));
9738 break;
9739
9740 case XPR_NODE:
9741 ret = cstring_makeLiteral ("<node>");
9742 break;
9743 }
9744
9745 return ret;
9746}
9747
28bf4b0b 9748bool
9749exprNode_isInitializer (exprNode e)
9750{
9751 return (exprNode_isDefined (e)
9752 && e->kind == XPR_INIT);
9753}
9754
616915dd 9755bool
e5081f8c 9756exprNode_isCharLiteral (exprNode e)
616915dd 9757{
9758 if (exprNode_isDefined (e))
9759 {
9760 return (multiVal_isChar (exprNode_getValue (e)));
9761 }
9762 else
9763 {
9764 return FALSE;
9765 }
9766}
9767
9768bool
e5081f8c 9769exprNode_isNumLiteral (exprNode e)
616915dd 9770{
9771 if (exprNode_isDefined (e))
9772 {
9773 return (multiVal_isInt (exprNode_getValue (e)));
9774 }
9775 else
9776 {
9777 return FALSE;
9778 }
9779}
9780
9781static bool
9782exprNode_isFalseConstant (exprNode e)
9783{
9784 if (exprNode_isDefined (e))
9785 {
9786 cstring s = exprNode_rootVarName (e);
9787
9788 if (cstring_equal (s, context_getFalseName ()))
9789 {
9790 return TRUE;
9791 }
9792 }
9793
9794 return FALSE;
9795}
9796
9797bool
9798exprNode_matchLiteral (ctype expected, exprNode e)
9799{
9800 if (exprNode_isDefined (e))
9801 {
9802 multiVal m = exprNode_getValue (e);
9803
9804 if (multiVal_isDefined (m))
9805 {
9806 if (multiVal_isInt (m))
9807 {
9808 long int val = multiVal_forceInt (m);
9809
e5081f8c 9810 if (ctype_isNumAbstract (expected)
9811 && context_flagOn (FLG_NUMABSTRACTLIT, exprNode_loc (e)))
9812 {
9813 return TRUE;
9814 }
9815
616915dd 9816 if (ctype_isDirectBool (ctype_realishType (expected)))
9817 {
9818 if (val == 0)
9819 {
9820 return FALSE; /* really?! return TRUE; allow use of 0 for FALSE */
9821 }
9822 else
9823 {
9824 return FALSE;
9825 }
9826 }
9827
9828 if (ctype_isRealInt (expected))
9829 {
9830 /*
9831 ** unsigned <- [ constant >= 0 is okay ]
9832 */
9833
9834 if (ctype_isUnsigned (expected))
9835 {
9836 if (val < 0)
9837 {
9838 return FALSE;
9839 }
9840 }
9841
9842 /*
9843 ** No checks on sizes of integers...maybe add
9844 ** these later.
9845 */
9846
9847 DPRINTF (("Here: %s => %s", exprNode_unparse (e), ctype_unparse (expected)));
9848 DPRINTF (("Type: %s / %s", ctype_unparse (exprNode_getType (e)),
9849 bool_unparse (ctype_isInt (exprNode_getType (e)))));
9850
9851 if (context_getFlag (FLG_NUMLITERAL)
9852 && (ctype_isRegularInt (exprNode_getType (e)) || val == 0)) {
9853 return TRUE;
9854 } else {
9855 if (val == 0) {
9856 return TRUE;
9857 } else {
9858 return FALSE; /* evs 2000-05-17: previously, always returned TRUE */
9859 }
9860 }
9861 }
9862 else if (ctype_isChar (expected))
9863 {
9864 return FALSE;
9865 }
9866 else if (ctype_isArrayPtr (expected))
9867 {
8fe44445 9868 /*
9869 ** evans 2001-10-14: We allow 0 to match any pointer, but only if the type matches or is void *.
9870 */
9871
9872 if (val == 0)
9873 {
9874 if (ctype_match (exprNode_getType (e), expected)
9875 || ctype_isVoidPointer (exprNode_getType (e)))
9876 {
9877 return TRUE;
9878 }
9879 }
9880 else
9881 {
9882 return FALSE;
9883 }
616915dd 9884 }
9885 else if (ctype_isAnyFloat (expected))
9886 {
9887 return (context_getFlag (FLG_NUMLITERAL));
9888 }
9889 else
9890 {
9891 return FALSE;
9892 }
9893 }
9894 else if (multiVal_isDouble (m))
9895 {
9896 if (ctype_isAnyFloat (expected))
9897 {
9898 return TRUE;
9899 }
9900 }
9901 else if (multiVal_isChar (m))
9902 {
c09ebffe 9903 /*signed? */ char val = multiVal_forceChar (m);
616915dd 9904
9905 if (ctype_isChar (expected))
9906 {
c09ebffe 9907 if (ctype_isUnsigned (expected) && ((int) val) < 0)
616915dd 9908 {
9909 return FALSE;
9910 }
9911 else
9912 {
9913 return TRUE;
9914 }
9915 }
9916 }
9917 else
9918 {
9919 return FALSE;
9920 }
9921 }
9922 }
9923
9924 return FALSE;
9925}
9926
9927bool
9928exprNode_matchType (ctype expected, exprNode e)
9929{
9930 ctype actual;
9931
9932 if (!exprNode_isDefined (e)) return TRUE;
9933
9934 actual = ctype_realishType (exprNode_getType (e));
9935
9936 if (ctype_match (ctype_realishType (expected), actual))
9937 {
9938 return TRUE;
9939 }
9940
9941 llassert (!exprNode_isError (e));
9942 return (exprNode_matchLiteral (expected, e));
9943}
9944
9945static bool
9946exprNode_matchTypes (exprNode e1, exprNode e2)
9947{
9948 ctype t1;
9949 ctype t2;
9950
9951 if (!exprNode_isDefined (e1)) return TRUE;
9952 if (!exprNode_isDefined (e2)) return TRUE;
9953
9954 /*
9955 ** realish type --- keep bools, bools
9956 */
9957
9958 t1 = ctype_realishType (exprNode_getType (e1));
9959 t2 = ctype_realishType (exprNode_getType (e2));
9960
9961 if (ctype_match (t1, t2))
9962 {
9963 return TRUE;
9964 }
9965
8fe44445 9966 DPRINTF (("Matching literal! %s %s %s %s",
9967 ctype_unparse (t1), exprNode_unparse (e2),
9968 ctype_unparse (t2), exprNode_unparse (e1)));
9969
616915dd 9970 return (exprNode_matchLiteral (t1, e2) || exprNode_matchLiteral (t2, e1));
9971}
9972
9973/*
9974** pass e as ct
9975*/
9976
9977static bool
9978 exprNode_matchArgType (ctype ct, exprNode e)
9979{
9980 ctype et;
9981
9982 if (!exprNode_isDefined (e))
9983 {
9984 return TRUE;
9985 }
9986
9987 et = ctype_realType (exprNode_getType (e));
9988
9989 if (ctype_matchArg (ct, et)) return TRUE;
9990
9991 llassert (!exprNode_isError (e));
9992 return (exprNode_matchLiteral (ct, e));
9993}
9994
9995static /*@only@*/ exprNodeSList
9996 exprNode_flatten (/*@dependent@*/ exprNode e) /*@*/
9997{
9998 if (exprNode_isDefined (e))
9999 {
10000 if (e->kind == XPR_STMTLIST)
10001 {
10002 return (exprNodeSList_append
10003 (exprNode_flatten (exprData_getPairA (e->edata)),
10004 exprNode_flatten (exprData_getPairB (e->edata))));
10005 }
10006 else if (e->kind == XPR_BLOCK)
10007 {
10008 return (exprNode_flatten (exprData_getSingle (e->edata)));
10009 }
10010 else
10011 {
10012 return (exprNodeSList_singleton (e));
10013 }
10014 }
10015
10016 return exprNodeSList_new ();
10017}
10018
10019static /*@exposed@*/ exprNode
10020exprNode_lastStatement (/*@returned@*/ exprNode e)
10021{
10022 if (exprNode_isDefined (e))
10023 {
10024 if (e->kind == XPR_STMTLIST)
10025 {
10026 exprNode b = exprData_getPairB (e->edata);
10027
10028 if (exprNode_isDefined (b))
10029 {
10030 return exprNode_lastStatement (b);
10031 }
10032 else
10033 {
10034 return exprNode_lastStatement (exprData_getPairA (e->edata));
10035 }
10036 }
10037 else if (e->kind == XPR_BLOCK)
10038 {
10039 return (exprNode_lastStatement (exprData_getSingle (e->edata)));
10040 }
10041 else
10042 {
10043 return (e);
10044 }
10045 }
10046
10047 return exprNode_undefined;
10048}
10049
10050static /*@exposed@*/ exprNode
10051exprNode_firstStatement (/*@returned@*/ exprNode e)
10052{
10053 if (exprNode_isDefined (e))
10054 {
10055 if (e->kind == XPR_STMTLIST)
10056 {
10057 exprNode b = exprData_getPairA (e->edata);
10058
10059 if (exprNode_isDefined (b))
10060 {
10061 return exprNode_firstStatement (b);
10062 }
10063 else
10064 {
10065 return exprNode_firstStatement (exprData_getPairB (e->edata));
10066 }
10067 }
10068 else if (e->kind == XPR_BLOCK)
10069 {
10070 return (exprNode_firstStatement (exprData_getSingle (e->edata)));
10071 }
10072 else
10073 {
10074 return (e);
10075 }
10076 }
10077
10078 return exprNode_undefined;
10079}
10080
10081static void
10082exprNode_mergeUSs (exprNode res, exprNode other)
10083{
10084 if (exprNode_isDefined (res) && exprNode_isDefined (other))
10085 {
10086 res->msets = sRefSet_union (res->msets, other->msets);
10087 res->sets = sRefSet_union (res->sets, other->sets);
10088 res->uses = sRefSet_union (res->uses, other->uses);
10089 }
10090}
10091
10092static void
10093exprNode_mergeCondUSs (exprNode res, exprNode other1, exprNode other2)
10094{
10095 if (exprNode_isDefined (res))
10096 {
10097 if (exprNode_isDefined (other1))
10098 {
10099 res->sets = sRefSet_union (res->sets, other1->sets);
10100 res->msets = sRefSet_union (res->msets, other1->msets);
10101 res->uses = sRefSet_union (res->uses, other1->uses);
10102 }
10103 if (exprNode_isDefined (other2))
10104 {
10105 res->sets = sRefSet_union (res->sets, other2->sets);
10106 res->msets = sRefSet_union (res->msets, other2->msets);
10107 res->uses = sRefSet_union (res->uses, other2->uses);
10108 }
10109 }
10110}
10111
10112/*
10113** modifies e->uses
10114**
10115** Reports errors is s is not defined.
10116*/
10117
10118static void
28bf4b0b 10119exprNode_addUse (exprNode e, /*@exposed@*/ sRef s)
616915dd 10120{
10121 if (exprNode_isDefined (e))
10122 {
10123 e->uses = sRefSet_insert (e->uses, s);
10124 }
10125}
10126
10127void
28bf4b0b 10128exprNode_checkUse (exprNode e, /*@exposed@*/ sRef s, fileloc loc)
616915dd 10129{
10130 if (sRef_isKnown (s) && !sRef_isConst (s))
10131 {
10132 /*
10133 ** need to check all outer types are useable
10134 */
10135
10136 DPRINTF (("Check use: %s / %s",
10137 exprNode_unparse (e), sRef_unparse (s)));
28bf4b0b 10138
616915dd 10139 exprNode_addUse (e, s);
10140
10141 if (!context_inProtectVars ())
10142 {
10143 /*
10144 ** only report the deepest error
10145 */
10146
10147 sRef errorRef = sRef_undefined;
10148 sRef lastRef = sRef_undefined;
10149 bool deadRef = FALSE;
10150 bool unuseable = FALSE;
10151 bool errorMaybe = FALSE;
10152
10153 while (sRef_isValid (s) && sRef_isKnown (s))
10154 {
3e3ec469 10155 ynm readable = sRef_isValidLvalue (s);
616915dd 10156
28bf4b0b 10157 DPRINTF (("Readable: %s / %s",
10158 sRef_unparseFull (s), ynm_unparse (readable)));
10159
616915dd 10160 if (!(ynm_toBoolStrict (readable)))
10161 {
10162 if (ynm_isMaybe (readable))
10163 {
10164 lastRef = errorRef;
10165 errorRef = s;
cd7d9b17 10166 DPRINTF (("Setting ERROR: %s", sRef_unparseFull (s)));
616915dd 10167 deadRef = sRef_isPossiblyDead (errorRef);
10168 unuseable = sRef_isUnuseable (errorRef);
10169 errorMaybe = TRUE;
10170 }
10171 else
10172 {
10173 lastRef = errorRef;
10174 errorRef = s;
16c024b5 10175 DPRINTF (("Setting ERROR: %s", sRef_unparseFull (s)));
616915dd 10176 deadRef = sRef_isDead (errorRef);
10177 unuseable = sRef_isUnuseable (errorRef);
10178 errorMaybe = FALSE;
10179 }
10180
16c024b5 10181 /*
616915dd 10182 if (!sRef_isPartial (s))
10183 {
cd7d9b17 10184 DPRINTF (("Defining! %s", sRef_unparseFull (s)));
16c024b5 10185 sRef_setDefined (s, loc);
10186 DPRINTF (("Defining! %s", sRef_unparseFull (s)));
616915dd 10187 }
16c024b5 10188 */
616915dd 10189 }
10190
10191 s = sRef_getBaseSafe (s);
10192 } /* end while */
10193
10194 if (sRef_isValid (errorRef))
10195 {
10196 if (sRef_isValid (lastRef) && sRef_isField (lastRef)
10197 && sRef_isPointer (errorRef))
10198 {
10199 errorRef = lastRef;
16c024b5 10200 DPRINTF (("errorRef: %s", sRef_unparseFull (errorRef)));
616915dd 10201 }
10202
10203 if (deadRef)
10204 {
10205 if (sRef_isThroughArrayFetch (errorRef))
10206 {
10207 if (optgenerror
10208 (FLG_STRICTUSERELEASED,
10209 message ("%q %q may be used after being released",
10210 sRef_unparseKindNamePlain (errorRef),
10211 sRef_unparse (errorRef)),
10212 loc))
10213 {
10214 sRef_showRefKilled (errorRef);
10215
10216 if (sRef_isKept (errorRef))
10217 {
10218 sRef_clearAliasState (errorRef, loc);
10219 }
10220 }
10221 }
10222 else
10223 {
16c024b5 10224 DPRINTF (("HERE: %s", sRef_unparseFull (errorRef)));
616915dd 10225
10226 if (optgenerror
10227 (FLG_USERELEASED,
10228 message ("%q %q %qused after being released",
10229 sRef_unparseKindNamePlain (errorRef),
10230 sRef_unparse (errorRef),
10231 cstring_makeLiteral (errorMaybe
10232 ? "may be " : "")),
10233 loc))
10234 {
10235 sRef_showRefKilled (errorRef);
10236
10237 if (sRef_isKept (errorRef))
10238 {
10239 sRef_clearAliasState (errorRef, loc);
10240 }
10241 }
10242 }
10243 }
10244 else if (unuseable)
10245 {
10246 if (optgenerror
10247 (FLG_USEDEF,
10248 message ("%q %q%qused in inconsistent state",
10249 sRef_unparseKindName (errorRef),
10250 sRef_unparseOpt (errorRef),
10251 cstring_makeLiteral (errorMaybe ? "may be " : "")),
10252 loc))
10253 {
10254 sRef_showStateInconsistent (errorRef);
10255 }
10256 }
10257 else
10258 {
28bf4b0b 10259 DPRINTF (("HERE: %s", sRef_unparseFull (errorRef)));
616915dd 10260
16c024b5 10261 if (optgenerror
10262 (FLG_USEDEF,
10263 message ("%q %q%qused before definition",
10264 sRef_unparseKindName (errorRef),
10265 sRef_unparseOpt (errorRef),
10266 cstring_makeLiteral (errorMaybe ? "may be " : "")),
10267 loc))
10268 {
10269 ;
10270 }
cd7d9b17 10271
10272 DPRINTF (("Error: %s", sRef_unparseFull (errorRef)));
616915dd 10273 }
10274
10275 sRef_setDefined (errorRef, loc);
10276
10277 if (sRef_isAddress (errorRef))
10278 {
10279 sRef_setDefined (sRef_getRootBase (errorRef), loc);
10280 }
10281 } /* end is error */
10282 }
10283 }
10284
10285 setCodePoint ();
10286}
10287
10288static void
28bf4b0b 10289checkSafeUse (exprNode e, /*@exposed@*/ sRef s)
616915dd 10290{
10291 if (exprNode_isDefined (e) && sRef_isKnown (s))
10292 {
10293 e->uses = sRefSet_insert (e->uses, s);
10294 }
10295}
10296
10297static void
10298exprNode_checkSetAny (exprNode e, /*@dependent@*/ cstring name)
10299{
10300 if (exprNode_isDefined (e))
10301 {
10302 e->sets = sRefSet_insert (e->sets, sRef_makeUnconstrained (name));
10303 }
10304}
10305
10306void
28bf4b0b 10307exprNode_checkSet (exprNode e, /*@exposed@*/ sRef s)
616915dd 10308{
10309 sRef defines = sRef_undefined;
10310
10311 if (sRef_isValid (s) && !sRef_isNothing (s))
10312 {
10313 uentry ue = sRef_getBaseUentry (s);
10314
10315 if (uentry_isValid (ue))
10316 {
10317 uentry_setLset (ue);
10318 }
10319
10320 if (!ynm_toBoolStrict (sRef_isWriteable (s)))
10321 {
10322 voptgenerror (FLG_USEDEF,
10323 message ("Attempt to set unuseable storage: %q",
10324 sRef_unparse (s)),
10325 exprNode_loc (e));
10326 }
10327
10328 if (sRef_isMeaningful (s))
1d239d69 10329 {
616915dd 10330 if (sRef_isDead (s))
10331 {
10332 sRef base = sRef_getBaseSafe (s);
10333
10334 if (sRef_isValid (base)
10335 && sRef_isDead (base))
10336 {
10337 sRef_setPartial (s, exprNode_loc (e));
10338 }
10339
10340 defines = s; /* okay - modifies for only param */
10341 }
10342 else if (sRef_isPartial (s))
10343 {
10344 sRef eref = exprNode_getSref (e);
10345
10346 if (!sRef_isPartial (eref))
10347 {
10348 /*
10349 ** should do something different here???
10350 */
10351
10352 sRef_setDefinedComplete (eref, exprNode_loc (e));
10353 }
10354 else
10355 {
10356 sRef_setPartialDefinedComplete (eref, exprNode_loc (e));
10357 }
10358
10359 if (sRef_isMeaningful (eref))
10360 {
10361 defines = eref;
10362 }
10363 else
10364 {
10365 defines = s;
10366 }
10367 }
10368 else if (sRef_isAllocated (s))
10369 {
10370 sRef eref = exprNode_getSref (e);
10371
10372
10373 if (!sRef_isAllocated (eref))
10374 {
10375 sRef_setDefinedComplete (eref, exprNode_loc (e));
10376 }
10377 else
10378 {
10379 sRef base = sRef_getBaseSafe (eref);
10380
10381 if (sRef_isValid (base))
10382 {
10383 sRef_setPdefined (base, exprNode_loc (e));
10384 }
10385 }
10386
10387 defines = s;
10388 }
10389 else
10390 {
10391 sRef_setDefinedNCComplete (s, exprNode_loc (e));
10392 defines = s;
10393 }
10394
10395 }
10396 else /* not meaningful...but still need to insert it */
10397 {
10398 defines = s;
10399 }
10400 }
10401
10402 if (exprNode_isDefined (e) && sRef_isValid (defines))
10403 {
10404 e->sets = sRefSet_insert (e->sets, defines);
10405 }
10406}
10407
10408void
28bf4b0b 10409exprNode_checkMSet (exprNode e, /*@exposed@*/ sRef s)
616915dd 10410{
10411 if (sRef_isValid (s) && !sRef_isNothing (s))
10412 {
10413 uentry ue = sRef_getBaseUentry (s);
10414
10415 if (uentry_isValid (ue))
10416 {
10417 uentry_setLset (ue);
10418 }
10419
10420 if (!ynm_toBoolStrict (sRef_isWriteable (s)))
10421 {
10422 voptgenerror (FLG_USEDEF,
10423 message ("Attempt to set unuseable storage: %q", sRef_unparse (s)),
10424 exprNode_loc (e));
10425 }
10426
10427 if (sRef_isMeaningful (s))
10428 {
10429 sRef_setDefinedComplete (s, exprNode_loc (e));
10430 }
10431
10432 if (exprNode_isDefined (e))
10433 {
10434 e->msets = sRefSet_insert (e->msets, s);
10435 }
10436 }
10437}
10438
10439static void
10440checkUnspecCall (/*@notnull@*/ /*@dependent@*/ exprNode fcn, uentryList params, exprNodeList args)
10441{
10442 checkAnyCall (fcn, cstring_undefined, params, args,
10443 FALSE, sRefSet_undefined, FALSE, 0);
10444}
10445
10446static void
10447checkOneArg (uentry ucurrent, /*@notnull@*/ exprNode current,
10448 /*@dependent@*/ exprNode fcn, bool isSpec, int argno, int totargs)
10449{
10450 setCodePoint ();
10451
10452 if (uentry_isYield (ucurrent))
10453 {
10454 sRef_setDefined (exprNode_getSref (current), exprNode_loc (current));
10455 exprNode_checkSet (current, current->sref);
10456 }
10457 else
10458 {
10459 if (uentry_isSefParam (ucurrent))
10460 {
10461 sRefSet sets = current->sets;
10462 sRef ref = exprNode_getSref (current);
10463
10464 if (sRef_isMacroParamRef (ref))
10465 {
10466 uentry ue = sRef_getUentry (ref);
10467
10468 if (!uentry_isSefParam (ue))
10469 {
10470 voptgenerror
10471 (FLG_SEFPARAMS,
10472 message
10473 ("Parameter %d to %s is declared sef, but "
10474 "the argument is a macro parameter declared "
10475 "without sef: %s",
10476 argno, exprNode_unparse (fcn),
10477 exprNode_unparse (current)),
10478 exprNode_loc (current));
10479 }
10480 }
10481
10482 if (!sRefSet_isEmpty (sets))
10483 {
10484 sRefSet reported = sRefSet_undefined;
10485
10486 sRefSet_realElements (current->sets, el)
10487 {
10488 if (sRefSet_isSameNameMember (reported, el))
10489 {
10490 ; /* don't report again */
10491 }
10492 else
10493 {
10494 if (sRef_isUnconstrained (el))
10495 {
10496 voptgenerror
10497 (FLG_SEFUNSPEC,
10498 message
10499 ("Parameter %d to %s is declared sef, but "
10500 "the argument calls unconstrained function %s "
10501 "(no guarantee it will not modify something): %s",
10502 argno, exprNode_unparse (fcn),
10503 sRef_unconstrainedName (el),
10504 exprNode_unparse (current)),
10505 exprNode_loc (current));
10506 }
10507 else
10508 {
10509 voptgenerror
10510 (FLG_SEFPARAMS,
10511 message
10512 ("Parameter %d to %s is declared sef, but "
10513 "the argument may modify %q: %s",
10514 argno, exprNode_unparse (fcn),
10515 sRef_unparse (el),
10516 exprNode_unparse (current)),
10517 exprNode_loc (current));
10518 }
10519 }
10520 } end_sRefSet_realElements;
10521 }
10522 }
10523
2e127cb8 10524 transferChecks_passParam (current, ucurrent, isSpec, fcn, argno, totargs);
616915dd 10525 exprNode_mergeUSs (fcn, current);
10526 }
10527}
10528
10529static void
10530 checkAnyCall (/*@dependent@*/ exprNode fcn,
10531 /*@dependent@*/ cstring fname,
10532 uentryList pn,
10533 exprNodeList args,
10534 bool hasMods, sRefSet mods,
10535 bool isSpec,
10536 int specialArgs)
10537{
10538 int paramno = 0;
10539 int nargs = exprNodeList_size (args);
10540
10541 setCodePoint ();
10542
10543 /*
10544 ** concat all args ud's to f, add each arg sref as a use unless
10545 ** it was specified as "out", in which case it is a def.
10546 */
10547
10548 uentryList_reset (pn);
10549
10550 /*
10551 ** aliasing checks:
10552 **
10553 ** if paramn is only or unique, no other arg may alias argn
10554 */
10555
10556 exprNodeList_elements (args, current)
10557 {
10558 paramno++;
10559
10560 if (exprNode_isDefined (current))
10561 {
10562 if ((!uentryList_isUndefined (pn) && !uentryList_isFinished (pn)))
10563 {
10564 uentry ucurrent = uentryList_current (pn);
10565
10566 if (specialArgs == 0
10567 || (paramno < specialArgs))
10568 {
28bf4b0b 10569 checkOneArg (ucurrent, current, fcn, isSpec, paramno, nargs);
616915dd 10570
10571 if (context_maybeSet (FLG_ALIASUNIQUE))
10572 {
10573 if (uentry_isOnly (ucurrent)
10574 || uentry_isUnique (ucurrent))
10575 {
10576 checkUniqueParams (fcn, current, args,
10577 paramno, ucurrent);
10578 }
10579 }
10580 }
10581 }
10582 else /* uentry is undefined */
10583 {
10584 if (specialArgs == 0)
10585 {
10586 exprNode_checkUseParam (current);
10587 }
10588
10589 exprNode_mergeUSs (fcn, current);
10590 }
10591 }
10592 uentryList_advanceSafe (pn);
10593 } end_exprNodeList_elements;
10594
10595 if (hasMods)
10596 {
10597 setCodePoint ();
10598
10599 sRefSet_allElements (mods, s)
10600 {
10601 sRef fb;
10602 sRef rb = sRef_getRootBase (s);
10603
28bf4b0b 10604 if (sRef_isFileOrGlobalScope (rb))
616915dd 10605 {
10606 context_usedGlobal (rb);
10607 }
10608
10609 fb = sRef_fixBaseParam (s, args);
10610
10611 if (!sRef_isMacroParamRef (fb))
10612 {
10613 if (sRef_isNothing (fb))
10614 {
10615 ;
10616 }
10617 else
10618 {
10619 if (sRef_isValid (fb))
10620 {
10621 uentry ue = sRef_getBaseUentry (s);
10622
10623 if (uentry_isValid (ue))
10624 {
10625 uentry_setLset (ue);
10626 }
10627 }
10628
10629 fcn->sets = sRefSet_insert (fcn->sets, fb);
10630 }
10631 }
10632 sRef_clearDerivedComplete (s);
10633 } end_sRefSet_allElements;
10634
10635 setCodePoint ();
10636 }
10637 else
10638 {
10639 if (context_hasMods ())
10640 {
10641 if (context_maybeSet (FLG_MODUNCON))
10642 {
10643 voptgenerror
10644 (FLG_MODUNCON,
10645 message ("Undetected modification possible "
10646 "from call to unconstrained function %s: %s",
10647 fname,
10648 exprNode_unparse (fcn)),
10649 exprNode_loc (fcn));
10650 }
10651 }
10652 else
10653 {
10654 if (context_maybeSet (FLG_MODUNCONNOMODS)
10655 && !(context_inIterDef () || context_inIterEnd ()))
10656 {
10657 voptgenerror
10658 (FLG_MODUNCONNOMODS,
10659 message ("Undetected modification possible "
10660 "from call to unconstrained function %s: %s",
10661 fname,
10662 exprNode_unparse (fcn)),
10663 exprNode_loc (fcn));
10664 }
10665 }
10666
10667 exprNode_checkSetAny (fcn, fname);
10668 }
10669}
10670
10671void exprNode_checkUseParam (exprNode current)
10672{
10673 if (exprNode_isDefined (current))
10674 {
10675 exprNode_checkUse (current, current->sref, current->loc);
10676 }
10677}
10678
10679static ctype
10680 checkNumerics (ctype tr1, ctype tr2, ctype te1, ctype te2,
10681 /*@notnull@*/ exprNode e1, /*@notnull@*/ exprNode e2,
10682 lltok op)
10683{
10684 ctype ret = tr1;
10685
10686 if (!ctype_match (tr1, tr2))
10687 {
10688 if ((ctype_isRealInt (tr1) || ctype_isReal (tr1)) &&
10689 (ctype_isRealInt (tr2) || ctype_isReal (tr2)))
10690 {
8fe44445 10691 DPRINTF (("No error: [%s] %s / [%s] %s",
10692 exprNode_unparse (e1), ctype_unparse (tr1),
10693 exprNode_unparse (e2), ctype_unparse (tr2)));
8ea5df88 10694
10695 /*
10696 ** evans 2003-06-15: changed this so if either type is a literal,
10697 ** the other type is used.
10698 ** (Need to look at the ISO C99 rules on this...)
10699 */
e5081f8c 10700
8ea5df88 10701 if (exprNode_isNumLiteral (e1)) {
10702 ret = tr2;
10703 } else if (exprNode_isNumLiteral (e2)) {
10704 ret = tr1;
10705 } else {
10706 ret = ctype_biggerType (tr1, tr2);
10707 }
616915dd 10708 }
10709 else
10710 {
e5081f8c 10711 if (ctype_isNumAbstract (tr1)
10712 && exprNode_isNumLiteral (e2)
10713 && context_flagOn (FLG_NUMABSTRACTLIT, e1->loc))
10714 {
10715 ret = tr1; /* No error */
10716 }
10717 else if (ctype_isNumAbstract (tr2)
10718 && exprNode_isNumLiteral (e1)
10719 && context_flagOn (FLG_NUMABSTRACTLIT, e1->loc))
10720 {
10721 ret = tr2;
10722 }
10723 else
10724 {
10725 if (gentypeerror
10726 (tr1, e1, tr2, e2,
10727 message ("Incompatible types for %s (%s, %s): %s %s %s",
10728 lltok_unparse (op),
10729 ctype_unparse (te1),
10730 ctype_unparse (te2),
10731 exprNode_unparse (e1), lltok_unparse (op),
10732 exprNode_unparse (e2)),
10733 e1->loc))
10734 {
10735 ret = ctype_unknown;
10736 }
10737 else
10738 {
10739 ret = ctype_biggerType (tr1, tr2);
10740 }
10741 }
616915dd 10742 }
616915dd 10743 }
10744 else
10745 {
e5081f8c 10746 if (ctype_isNumAbstract (tr1))
10747 {
10748 ret = tr1;
10749 }
10750 else if (ctype_isForceRealNumeric (&tr1)
10751 && ctype_isForceRealNumeric (&tr2))
616915dd 10752 {
10753 ret = ctype_resolveNumerics (tr1, tr2);
10754 }
10755 else if (!context_msgStrictOps ())
10756 {
e5081f8c 10757 if (ctype_isPointer (tr1))
616915dd 10758 {
10759 if (ctype_isPointer (tr2) && !exprNode_isNullValue (e2))
10760 {
10761 ret = ctype_int;
10762 }
10763 else if (ctype_isInt (tr2))
10764 {
10765 ret = te1;
10766 }
10767 else
10768 {
10769 ret = ctype_unknown;
10770 }
10771 }
10772 else if (ctype_isPointer (tr2))
10773 {
10774 if (ctype_isPointer (tr1))
10775 {
10776 ret = ctype_int;
10777 }
10778 else if (ctype_isInt (tr1))
10779 {
10780 ret = te2;
10781 }
10782 else
10783 {
10784 ret = ctype_unknown;
10785 }
10786 }
10787 else
10788 {
10789 ret = ctype_resolveNumerics (tr1, tr2);
10790 }
10791 }
10792 else
10793 {
10794 int opid = lltok_getTok (op);
10795 bool comparop = (opid == EQ_OP || opid == NE_OP
10796 || opid == TLT || opid == TGT
10797 || opid == LE_OP || opid == GE_OP);
10798
10799 if (!ctype_isNumeric (tr1) && !ctype_isNumeric (tr2))
10800 {
10801 if (comparop
10802 && ((ctype_isEnum (tr1) && ctype_isEnum (tr2))
10803 || (ctype_isBool (tr1) && ctype_isBool (tr2))
10804 || (ctype_isChar (tr1) && ctype_isChar (tr2))))
10805 {
10806 ; /* no error */
10807 }
10808 else
10809 {
10810 if (ctype_sameName (te1, te2))
10811 {
10812 voptgenerror
10813 (FLG_STRICTOPS,
10814 message ("Operands of %s are non-numeric (%t): %s %s %s",
10815 lltok_unparse (op), te1,
10816 exprNode_unparse (e1), lltok_unparse (op),
10817 exprNode_unparse (e2)),
10818 e1->loc);
10819 }
10820 else
10821 {
10822 voptgenerror
10823 (FLG_STRICTOPS,
10824 message ("Operands of %s are non-numerics (%t, %t): %s %s %s",
10825 lltok_unparse (op), te1, te2,
10826 exprNode_unparse (e1), lltok_unparse (op),
10827 exprNode_unparse (e2)),
10828 e1->loc);
10829 }
10830 }
10831 }
10832 else if (!ctype_isNumeric (tr1))
10833 {
10834 voptgenerror
10835 (FLG_STRICTOPS,
10836 message ("Right operand of %s is non-numeric (%t): %s %s %s",
10837 lltok_unparse (op), te1,
10838 exprNode_unparse (e1), lltok_unparse (op),
10839 exprNode_unparse (e2)),
10840 e1->loc);
10841 }
10842 else
10843 {
10844 if (!ctype_isNumeric (tr2))
10845 {
10846 voptgenerror
10847 (FLG_STRICTOPS,
10848 message ("Left operand of %s is non-numeric (%t): %s %s %s",
10849 lltok_unparse (op), te2,
10850 exprNode_unparse (e1), lltok_unparse (op),
10851 exprNode_unparse (e2)),
10852 e2->loc);
10853 }
10854 }
10855
10856 ret = ctype_unknown;
10857 }
10858 }
10859
10860 return ret;
10861}
10862
e5081f8c 10863static bool
616915dd 10864abstractOpError (ctype tr1, ctype tr2, lltok op,
10865 /*@notnull@*/ exprNode e1, /*@notnull@*/ exprNode e2,
10866 fileloc loc1, fileloc loc2)
10867{
10868 if (ctype_isRealAbstract (tr1) && ctype_isRealAbstract (tr2))
10869 {
10870 if (ctype_match (tr1, tr2))
10871 {
e5081f8c 10872 if (ctype_isRealNumAbstract (tr1))
10873 {
10874 ; /* No warning for numabstract types */
10875 }
10876 else
10877 {
16c024b5 10878 if (lltok_isEqOp (op) || lltok_isNotEqOp (op))
10879 {
10880 return optgenerror
10881 (FLG_ABSTRACTCOMPARE,
10882 message ("Object equality comparison (%s) on objects of abstract type (%t): %s %s %s",
10883 lltok_unparse (op), tr1,
10884 exprNode_unparse (e1), lltok_unparse (op), exprNode_unparse (e2)),
10885 loc1);
10886 }
10887 else
10888 {
10889 return optgenerror
10890 (FLG_ABSTRACT,
10891 message ("Operands of %s are abstract type (%t): %s %s %s",
10892 lltok_unparse (op), tr1,
10893 exprNode_unparse (e1), lltok_unparse (op), exprNode_unparse (e2)),
10894 loc1);
10895 }
e5081f8c 10896 }
616915dd 10897 }
10898 else
10899 {
e5081f8c 10900 if (ctype_isRealNumAbstract (tr1) && ctype_isRealNumAbstract (tr2))
10901 {
10902 return optgenerror
10903 (FLG_NUMABSTRACT,
10904 message
10905 ("Operands of %s are different numabstract types (%t, %t): %s %s %s",
10906 lltok_unparse (op), tr1, tr2,
10907 exprNode_unparse (e1),
10908 lltok_unparse (op), exprNode_unparse (e2)),
10909 loc1);
10910 }
10911 else
10912 {
10913 return optgenerror
10914 (FLG_ABSTRACT,
10915 message ("Operands of %s are abstract types (%t, %t): %s %s %s",
10916 lltok_unparse (op), tr1, tr2,
10917 exprNode_unparse (e1), lltok_unparse (op),
10918 exprNode_unparse (e2)),
10919 loc1);
10920 }
616915dd 10921 }
10922 }
e5081f8c 10923 else if (ctype_isRealAbstract (tr1) && !ctype_isRealNumAbstract (tr1))
616915dd 10924 {
e5081f8c 10925 return optgenerror
616915dd 10926 (FLG_ABSTRACT,
10927 message ("Left operand of %s is abstract type (%t): %s %s %s",
10928 lltok_unparse (op), tr1,
10929 exprNode_unparse (e1), lltok_unparse (op), exprNode_unparse (e2)),
10930 loc1);
10931 }
10932 else
10933 {
e5081f8c 10934 if (ctype_isRealAbstract (tr2) && !ctype_isRealNumAbstract (tr2))
616915dd 10935 {
e5081f8c 10936 return optgenerror
616915dd 10937 (FLG_ABSTRACT,
10938 message ("Right operand of %s is abstract type (%t): %s %s %s",
10939 lltok_unparse (op), tr2,
10940 exprNode_unparse (e1), lltok_unparse (op), exprNode_unparse (e2)),
10941 loc2);
10942 }
10943 }
e5081f8c 10944
10945 return FALSE;
616915dd 10946}
10947
10948/*
10949** e1 <= e2
10950**
10951** requies e1 and e2 and not error exprNode's.
10952**
10953** Checks:
10954**
10955** If e1 is a component of an abstract type, and e2 is mutable and client-visible,
10956** the rep of the abstract type is exposed.
10957**
10958** The order is very important:
10959**
10960** check rep expose (move into check transfer)
10961** check transfer
10962** setup aliases
10963*/
10964
10965/*
10966** This isn't really a sensible procedure, but the indententation
10967** was getting too deep.
10968*/
10969
10970static void
10971checkOneRepExpose (sRef ysr, sRef base,
10972 /*@notnull@*/ exprNode e1,
10973 /*@notnull@*/ exprNode e2, ctype ct,
10974 sRef s2b)
10975{
10976 if (!(sRef_isOnly (ysr) || sRef_isKeep (ysr)
08eb3d0e 10977 || sRef_isOwned (ysr)
10978 || sRef_isExposed (ysr)))
616915dd 10979 {
08eb3d0e 10980 if (sRef_isAnyParam (base) && !sRef_isExposed (base)
10981 && !sRef_isObserver (base)) /* evans 2001-07-11: added isObserver */
10982
616915dd 10983 {
10984 if (sRef_isIReference (ysr))
10985 {
10986 if (sRef_sameName (base, sRef_getRootBase (e2->sref)))
10987 {
10988 voptgenerror
10989 (FLG_ASSIGNEXPOSE,
10990 message
10991 ("Assignment of mutable component of parameter %q "
10992 "to component of abstract "
10993 "type %s exposes rep: %s = %s",
10994 sRef_unparse (base),
10995 ctype_unparse (ct),
10996 exprNode_unparse (e1), exprNode_unparse (e2)),
10997 e1->loc);
10998 }
10999 else
11000 {
11001 voptgenerror
11002 (FLG_ASSIGNEXPOSE,
11003 message
11004 ("Assignment of mutable component of parameter %q "
11005 "(through alias %q) to component of abstract "
11006 "type %s exposes rep: %s = %s",
11007 sRef_unparse (base),
11008 sRef_unparse (e2->sref),
11009 ctype_unparse (ct),
11010 exprNode_unparse (e1), exprNode_unparse (e2)),
11011 e1->loc);
11012 }
11013 }
11014 else
11015 {
11016 if (sRef_sameName (base, sRef_getRootBase (e2->sref)))
11017 {
11018 voptgenerror
11019 (FLG_ASSIGNEXPOSE,
11020 message ("Assignment of mutable parameter %q "
11021 "to component of abstract type %s "
11022 "exposes rep: %s = %s",
11023 sRef_unparse (base),
11024 ctype_unparse (ct),
11025 exprNode_unparse (e1),
11026 exprNode_unparse (e2)),
11027 e1->loc);
11028 }
11029 else
11030 {
11031 voptgenerror
11032 (FLG_ASSIGNEXPOSE,
11033 message ("Assignment of mutable parameter %q "
11034 "(through alias %q) to "
11035 "component of abstract type %s exposes "
11036 "rep: %s = %s",
11037 sRef_unparse (base),
11038 sRef_unparse (e2->sref),
11039 ctype_unparse (ct),
11040 exprNode_unparse (e1),
11041 exprNode_unparse (e2)),
11042 e1->loc);
11043 }
11044 }
11045 }
11046
28bf4b0b 11047 if (sRef_isFileOrGlobalScope (s2b))
616915dd 11048 {
11049 if (sRef_sameName (base, sRef_getRootBase (e2->sref)))
11050 {
11051 voptgenerror
11052 (FLG_REPEXPOSE,
11053 message ("Assignment of global %q "
11054 "to component of "
11055 "abstract type %s exposes rep: %s = %s",
11056 sRef_unparse (base),
11057 ctype_unparse (ct),
11058 exprNode_unparse (e1), exprNode_unparse (e2)),
11059 e1->loc);
11060 }
11061 else
11062 {
11063 voptgenerror
11064 (FLG_REPEXPOSE,
11065 message ("Assignment of global %q (through alias %q) "
11066 "to component of "
11067 "abstract type %s exposes rep: %s = %s",
11068 sRef_unparse (base),
11069 sRef_unparse (e2->sref),
11070 ctype_unparse (ct),
11071 exprNode_unparse (e1), exprNode_unparse (e2)),
11072 e1->loc);
11073 }
11074 }
11075 }
11076}
11077
11078static void
11079doAssign (/*@notnull@*/ exprNode e1, /*@notnull@*/ exprNode e2, bool isInit)
11080{
7534721d 11081 DPRINTF (("Do assign: %s <- %s",
11082 exprNode_unparse (e1), exprNode_unparse (e2)));
11083 DPRINTF (("Ctype: %s", ctype_unparse (exprNode_getType (e1))));
11084
616915dd 11085 if (ctype_isRealFunction (exprNode_getType (e1))
11086 && !ctype_isRealPointer (exprNode_getType (e1)))
11087 {
11088 voptgenerror
11089 (FLG_TYPE,
11090 message ("Invalid left-hand side of assignment (function type %s): %s",
11091 ctype_unparse (exprNode_getType (e1)),
11092 exprNode_unparse (e1)),
11093 e1->loc);
11094 }
11095
11096 if (context_getFlag (FLG_ASSIGNEXPOSE) && ctype_isMutable (e2->typ))
11097 {
11098 ctype t2 = exprNode_getType (e2);
11099 sRef sr = sRef_getRootBase (e1->sref);
11100 ctype ct = sRef_getType (sr);
11101
11102 if (ctype_isAbstract (t2)
b73d1009 11103 && !ctype_isNumAbstract (t2)
616915dd 11104 && !(uentry_isMutableDatatype (usymtab_getTypeEntry (ctype_typeId (t2)))))
11105 {
11106 /* it is immutable, okay to reference */
11107 goto donerepexpose;
11108 }
11109
11110 if (ctype_isAbstract (ct) && sRef_isIReference (e1->sref))
11111 {
11112 sRef s2b = sRef_getRootBase (e2->sref);
11113 sRef s1 = e1->sref;
11114 sRef s1b = sRef_getRootBase (s1);
11115 sRefSet aliases;
11116
11117 aliases = usymtab_canAlias (e2->sref);
11118
11119 if (!sRef_similar (s2b, s1b)
11120 && !sRef_isExposed (s1)
11121 && !(sRef_isOnly (s2b) || sRef_isKeep (s2b) || sRef_isExposed (s2b)))
11122 {
11123 if (sRef_isAnyParam (s2b) && !sRef_isOnly (s2b)
11124 && !sRef_isOwned (s2b) && !sRef_isKeep (s2b)
11125 && !sRef_isExposed (s2b))
11126 {
11127 if (sRef_isIReference (e2->sref))
11128 {
11129 voptgenerror
11130 (FLG_ASSIGNEXPOSE,
11131 message
11132 ("Assignment of mutable component of parameter %q "
11133 "to component of abstract type %s exposes rep: %s = %s",
11134 sRef_unparse (s2b),
11135 ctype_unparse (ct),
11136 exprNode_unparse (e1), exprNode_unparse (e2)),
11137 e1->loc);
11138 }
11139 else
11140 {
11141 voptgenerror
11142 (FLG_ASSIGNEXPOSE,
11143 message ("Assignment of mutable parameter %q to "
11144 "component of abstract type %s exposes rep: %s = %s",
11145 sRef_unparse (s2b),
11146 ctype_unparse (ct),
11147 exprNode_unparse (e1), exprNode_unparse (e2)),
11148 e1->loc);
11149 }
11150 }
11151
28bf4b0b 11152 if (sRef_isFileOrGlobalScope (s2b))
616915dd 11153 {
11154 voptgenerror
11155 (FLG_ASSIGNEXPOSE,
11156 message ("Assignment of global %q to component of "
11157 "abstract type %s exposes rep: %s = %s",
11158 sRef_unparse (s2b),
11159 ctype_unparse (ct),
11160 exprNode_unparse (e1), exprNode_unparse (e2)),
11161 e1->loc);
11162 }
11163
11164 sRefSet_realElements (aliases, ysr)
11165 {
11166 sRef base = sRef_getRootBase (ysr);
11167
11168 if (sRef_similar (ysr, s2b) || sRef_similar (s1b, base)
11169 || sRef_sameName (base, s1b))
11170 {
11171 ; /* error already reported or same sref */
11172 }
11173 else
11174 {
11175 checkOneRepExpose (ysr, base, e1, e2, ct, s2b);
11176 }
11177 } end_sRefSet_realElements;
11178 }
11179 sRefSet_free (aliases);
11180 }
11181 }
11182
11183 donerepexpose:
11184
11185 /*
11186 ** function variables don't really work...
11187 */
11188
11189 if (!ctype_isFunction (ctype_realType (e2->typ)))
11190 {
11191 if (isInit)
11192 {
28bf4b0b 11193 DPRINTF (("Check init: %s / %s",
11194 exprNode_unparse (e1), exprNode_unparse (e2)));
2e127cb8 11195 transferChecks_initialization (e1, e2);
616915dd 11196 }
11197 else
11198 {
2e127cb8 11199 transferChecks_assign (e1, e2);
616915dd 11200 }
11201 }
11202 else
11203 {
11204 sRef fref = e2->sref;
11205
11206 sRef_setDefState (e1->sref, sRef_getDefState (fref), e1->loc);
11207 sRef_setNullState (e1->sref, sRef_getNullState (fref), e1->loc);
11208
11209 /* Need to typecheck the annotation on the parameters */
11210
11211 if (ctype_isRealFunction (e1->typ)) {
11212 uentryList e1p = ctype_argsFunction (ctype_realType (e1->typ));
11213 uentryList e2p = ctype_argsFunction (ctype_realType (e2->typ));
11214
11215 if (!uentryList_isMissingParams (e1p)
11216 && !uentryList_isMissingParams (e2p)
11217 && uentryList_size (e1p) > 0) {
11218 if (uentryList_size (e1p) == uentryList_size (e2p)) {
11219 int n = 0;
11220
11221 uentryList_elements (e1p, el1) {
11222 uentry el2;
11223
11224 el2 = uentryList_getN (e2p, n);
11225 n++;
11226 uentry_checkMatchParam (el1, el2, n, e2);
11227 } end_uentryList_elements;
11228 }
11229 }
11230 }
11231 }
11232
7534721d 11233 if (exprNode_isStringLiteral (e2))
11234 {
11235 exprNode_checkStringLiteralLength (exprNode_getType (e1), e2);
11236 }
11237
28bf4b0b 11238 if (isInit && sRef_isFileOrGlobalScope (e1->sref))
616915dd 11239 {
11240 ;
11241 }
11242 else
11243 {
28bf4b0b 11244 DPRINTF (("Update aliases: %s / %s", exprNode_unparse (e1), exprNode_unparse (e2)));
616915dd 11245 updateAliases (e1, e2);
11246 }
616915dd 11247}
11248
11249static void
11250checkMacroParen (exprNode e)
11251{
11252 if (exprNode_isError (e) || e->kind == XPR_CAST)
11253 {
11254 ;
11255 }
11256 else
11257 {
11258 if (sRef_isUnsafe (e->sref) && !exprNode_isInParens (e))
11259 {
11260 voptgenerror
11261 (FLG_MACROPARENS,
11262 message ("Macro parameter used without parentheses: %s",
11263 exprNode_unparse (e)),
11264 e->loc);
11265 }
11266 }
11267}
11268
11269static void
11270reflectNullTest (/*@notnull@*/ exprNode e, bool isnull)
11271{
11272 if (isnull)
11273 {
11274 e->guards = guardSet_addTrueGuard (e->guards, e->sref);
11275 }
11276 else
11277 {
11278 e->guards = guardSet_addFalseGuard (e->guards, e->sref);
11279 }
11280}
11281
11282/*
11283** e1 <= e2
11284**
11285** if e2 is a parameter or global derived location which
11286** can be modified (that is, e2 is a mutable abstract type,
11287** or a derived pointer), then e1 can alias e2.
11288**
11289** e1 can alias everything which e2 can alias.
11290**
11291** Also, if e1 is guarded, remove from guard sets!
11292*/
11293
11294static void updateAliases (/*@notnull@*/ exprNode e1, /*@notnull@*/ exprNode e2)
11295{
11296 if (!context_inProtectVars ())
11297 {
11298 /*
11299 ** depends on types of e1 and e2
11300 */
11301
11302 sRef s1 = e1->sref;
11303 sRef s2 = e2->sref;
11304 ctype t1 = exprNode_getType (e1);
11305
11306 /* handle pointer sRefs, record fields, arrays, etc... */
11307
11308 if (!ctype_isRealSU (t1))
11309 {
28bf4b0b 11310 DPRINTF (("Copying real! %s", ctype_unparse (t1)));
616915dd 11311 sRef_copyRealDerivedComplete (s1, s2);
11312 }
28bf4b0b 11313 else
11314 {
11315 /*
11316 ** Fields should alias
11317 */
11318
11319 DPRINTF (("Not COPYING!: %s", ctype_unparse (t1)));
11320 }
616915dd 11321
11322 if (ctype_isMutable (t1) && sRef_isKnown (s1))
11323 {
11324 usymtab_clearAlias (s1);
11325 usymtab_addMustAlias (s1, s2);
28bf4b0b 11326 DPRINTF (("Add must alias: %s / %s", sRef_unparse (s1), sRef_unparse (s2)));
11327 }
11328 else
11329 {
11330 DPRINTF (("Not mutable: %s", ctype_unparse (t1)));
616915dd 11331 }
11332
11333 if (sRef_possiblyNull (s1) && usymtab_isGuarded (s1))
11334 {
11335 usymtab_unguard (s1);
11336 }
11337 }
11338}
11339
11340exprNode exprNode_updateLocation (/*@returned@*/ exprNode e, /*@temp@*/ fileloc loc)
11341{
11342 if (exprNode_isDefined (e))
11343 {
11344 e->loc = fileloc_update (e->loc, loc);
11345 }
11346 else
11347 {
11348 e = exprNode_createLoc (ctype_unknown, fileloc_copy (loc));
11349 }
11350
11351 return (e);
11352}
11353
11354static void checkUniqueParams (exprNode fcn,
11355 /*@notnull@*/ exprNode current,
11356 exprNodeList args,
11357 int paramno, uentry ucurrent)
11358{
11359 int iparamno = 0;
11360 sRef thisref = exprNode_getSref (current);
11361
11362 /*
11363 ** Check if any argument could match this argument.
11364 */
11365
11366 exprNodeList_elements (args, icurrent)
11367 {
11368 iparamno++;
11369
11370 if (iparamno != paramno)
11371 {
11372 sRef sr = exprNode_getSref (icurrent);
11373
11374 if (sRef_similarRelaxed (thisref, sr))
11375 {
11376 if (!sRef_isConst (thisref) && !sRef_isConst (sr))
11377 {
11378 voptgenerror
11379 (FLG_ALIASUNIQUE,
11380 message
11381 ("Parameter %d (%s) to function %s is declared %s but "
11382 "is aliased by parameter %d (%s)",
11383 paramno,
11384 exprNode_unparse (current),
11385 exprNode_unparse (fcn),
11386 alkind_unparse (uentry_getAliasKind (ucurrent)),
11387 iparamno, exprNode_unparse (icurrent)),
11388 current->loc);
11389 }
11390 }
11391 else
11392 {
11393 sRefSet aliases = usymtab_canAlias (sr);
11394
11395 sRefSet_allElements (aliases, asr)
11396 {
11397 if (ctype_isUnknown (sRef_getType (thisref)))
11398 {
11399 sRef_setType (thisref, uentry_getType (ucurrent));
11400 }
11401
11402 if (sRef_similarRelaxed (thisref, asr))
11403 {
11404 if (sRef_isExternal (asr))
11405 {
11406 if (sRef_isLocalState (thisref))
11407 {
11408 ; /* okay */
11409 }
11410 else
11411 {
11412 sRef base = sRef_getRootBase (asr);
11413
11414 if (!sRef_similar (sRef_getBase (asr), thisref))
11415 {
11416 if (sRef_isUnique (base) || sRef_isOnly (base)
11417 || sRef_isKept (base)
11418 || (sRef_isAddress (asr) && sRef_isLocalVar (base))
11419 || (sRef_isAddress (thisref)
11420 && sRef_isLocalVar (sRef_getRootBase (thisref))))
11421 {
11422 ; /* okay, no error */
11423 }
11424 else
11425 {
11426 voptgenerror
11427 (FLG_MAYALIASUNIQUE,
11428 message
11429 ("Parameter %d (%s) to function %s is declared %s but "
11430 "may be aliased externally by parameter %d (%s)",
11431 paramno,
11432 exprNode_unparse (current),
11433 exprNode_unparse (fcn),
11434 alkind_unparse (uentry_getAliasKind (ucurrent)),
11435 iparamno, exprNode_unparse (icurrent)),
11436 current->loc);
11437 }
11438 }
11439 }
11440 }
11441 else
11442 {
11443 voptgenerror
11444 (FLG_ALIASUNIQUE,
11445 message
11446 ("Parameter %d (%s) to function %s is declared %s but "
11447 "is aliased externally by parameter %d (%s) through "
11448 "alias %q",
11449 paramno,
11450 exprNode_unparse (current),
11451 exprNode_unparse (fcn),
11452 alkind_unparse (uentry_getAliasKind (ucurrent)),
11453 iparamno, exprNode_unparse (icurrent),
11454 sRef_unparse (asr)),
11455 current->loc);
11456 }
11457 }
11458 } end_sRefSet_allElements;
11459 sRefSet_free (aliases);
11460 }
11461 }
11462 } end_exprNodeList_elements;
11463}
11464
517a2db3 11465long exprNode_getLongValue (exprNode e)
11466{
616915dd 11467 long value;
517a2db3 11468
11469 if (exprNode_hasValue (e) && multiVal_isInt (exprNode_getValue (e)))
616915dd 11470 {
11471 value = multiVal_forceInt (exprNode_getValue (e));
11472 }
11473 else
11474 {
517a2db3 11475 value = 0; /* Unknown value */
616915dd 11476 }
11477
11478 return value;
11479}
11480
bb25bea6 11481/*@only@*/ fileloc exprNode_getNextSequencePoint (exprNode e)
616915dd 11482{
11483 /*
11484 ** Returns the location of the sequence point following e.
11485 **
11486 ** Only works for statements (for now).
11487 */
11488
11489 if (exprNode_isDefined (e) && e->kind == XPR_STMT) {
11490 lltok t = exprData_getUopTok (e->edata);
bb25bea6 11491 return fileloc_copy(lltok_getLoc (t));
616915dd 11492 } else {
b7b694d6 11493 /* drl possible problem : warning fix
11494 llcontbug (message ("Cannot get next sequence point: %s", exprNode_unparse (e)));
11495 */
616915dd 11496 return fileloc_undefined;
11497 }
11498 }
11499
9280addf 11500exprNode exprNode_createNew(ctype c)
11501{
11502 exprNode ret;
11503
11504 ret = exprNode_createPlain (c);
11505
11506 return ret;
11507}
d30bc0c7 11508
11509bool exprNode_isInitBlock (exprNode e)
11510{
11511 return (exprNode_isDefined(e) && e->kind == XPR_INITBLOCK);
11512}
72704d73 11513
11514/*drl 3/2/2003 moved this function out of constraint.c */
11515exprNode exprNode_copyConstraints (/*@returned@*/ exprNode dst, exprNode src)
11516{
11517
11518 llassert (exprNode_isDefined (dst) );
11519 llassert (exprNode_isDefined (src) );
11520
11521 constraintList_free (dst->ensuresConstraints);
11522 constraintList_free (dst->requiresConstraints);
11523 constraintList_free (dst->trueEnsuresConstraints);
11524 constraintList_free (dst->falseEnsuresConstraints);
11525
11526 dst->ensuresConstraints = constraintList_copy (src->ensuresConstraints);
11527 dst->requiresConstraints = constraintList_copy (src->requiresConstraints);
11528 dst->trueEnsuresConstraints = constraintList_copy (src->trueEnsuresConstraints);
11529 dst->falseEnsuresConstraints = constraintList_copy (src->falseEnsuresConstraints);
11530 return dst;
11531}
909cf5eb 11532
11533void exprNode_revealState (exprNode e)
11534{
11535 if (exprNode_isDefined (e)) {
11536 llmsg (message ("%s: State of %s: %s", fileloc_unparse (exprNode_loc (e)),
11537 exprNode_unparse (e), sRef_unparseFull (e->sref)));
11538 } else {
11539 llmsg (message ("%s: Reveal state undefined", fileloc_unparse (g_currentloc)));
11540 }
11541}
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