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Fixes for win32
[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 ();
1014 e->sets = sRefSet_new ();
1015 e->msets = sRefSet_new ();
1016 e->uses = sRefSet_new ();
1017
1b8ae690 1018 /*> missing fields, detected by splint <*/
616915dd 1019 e->exitCode = XK_NEVERESCAPE;
1020 e->isJumpPoint = FALSE;
1021 e->canBreak = FALSE;
1022 e->mustBreak = FALSE;
1023
02b84d4b 1024 exprNode_defineConstraints (e);
616915dd 1025 return e;
1026 }
1027 else
1028 {
28bf4b0b 1029 return exprNode_createUnknown ();
616915dd 1030 }
1031}
1032
1033/*@notnull@*/ exprNode
1034exprNode_fromIdentifier (/*@observer@*/ uentry c)
1035{
1036 exprNode ret;
1037
1038 if (context_justPopped ()) /* watch out! c could be dead */
1039 {
16c024b5 1040 uentry ce = usymtab_lookupSafe (cscannerHelp_observeLastIdentifier ());
616915dd 1041
1042 if (uentry_isValid (ce))
1043 {
1044 c = ce;
1045 }
1046 else
1047 {
1048 llbuglit ("Looks like Aunt Millie forgot to walk to dog again.");
1049 }
1050 }
1051
1052 ret = exprNode_fromIdentifierAux (c);
616915dd 1053 return ret;
1054}
1055
7534721d 1056static void exprNode_checkStringLiteralLength (ctype t1, exprNode e2)
1057{
1058 multiVal mval = exprNode_getValue (e2);
1059 cstring slit;
37ae0b5e 1060 size_t len;
7534721d 1061
1062 if (ctype_isFixedArray (t1))
1063 {
37ae0b5e 1064 size_t nelements = ctype_getArraySize (t1);
7534721d 1065
1066 llassert (multiVal_isString (mval));
1067 slit = multiVal_forceString (mval);
1810fe2a 1068
1069 len = cstring_lengthExpandEscapes (slit);
1070
abd7f895 1071 llassert (exprNode_isDefined (e2));
1072
7534721d 1073 if (len == nelements)
1074 {
1810fe2a 1075 mstring temp;
1076
abd7f895 1077 temp = cstring_expandEscapes (slit);
1810fe2a 1078
1079 if (temp[len-1] == '\0')
1080 {
1081 voptgenerror
1082 (FLG_STRINGLITNOROOMFINALNULL,
1083 message ("String literal with %d character%& "
1084 "is assigned to %s (no room for final null terminator): %s",
e5081f8c 1085 size_toInt (len + 1),
1810fe2a 1086 ctype_unparse (t1),
1087 exprNode_unparse (e2)),
1088 e2->loc);
1089 }
1090 else
1091 {
abd7f895 1092 voptgenerror
1093 (FLG_STRINGLITNOROOM,
1094 message ("String literal with %d character%& "
1095 "is assigned to %s (no room for null terminator): %s",
e5081f8c 1096 size_toInt (len + 1),
abd7f895 1097 ctype_unparse (t1),
1098 exprNode_unparse (e2)),
1099 e2->loc);
1810fe2a 1100 }
7534721d 1101 }
1102 else if (len > nelements)
1103 {
1104 voptgenerror
1105 (FLG_STRINGLITTOOLONG,
1810fe2a 1106 message ("String literal with %d character%& (counting null terminator) "
7534721d 1107 "is assigned to %s (insufficient storage available): %s",
e5081f8c 1108 size_toInt (len + 1),
7534721d 1109 ctype_unparse (t1),
1110 exprNode_unparse (e2)),
1111 e2->loc);
1112 }
1113 else if (len < nelements - 1)
1114 {
1115 voptgenerror
1116 (FLG_STRINGLITSMALLER,
1117 message ("String literal with %d character%& is assigned to %s (possible waste of storage): %s",
e5081f8c 1118 size_toInt (len + 1),
7534721d 1119 ctype_unparse (t1),
1120 exprNode_unparse (e2)),
1121 e2->loc);
1122 }
1123 else
1124 {
1125 ; /* okay */
1126 }
1127 }
1128}
1129
616915dd 1130static /*@only@*/ /*@notnull@*/ exprNode
1131exprNode_fromIdentifierAux (/*@observer@*/ uentry c)
1132{
1133 exprNode e = exprNode_createId (c);
1134 sRef sr = e->sref;
1135
1136 uentry_setUsed (c, e->loc);
1137
28bf4b0b 1138 if (uentry_isVar (c) && sRef_isFileOrGlobalScope (sr))
616915dd 1139 {
1140 checkGlobUse (c, FALSE, e);
1141 }
1142
1143 return (e);
1144}
1145
1146static bool
1147exprNode_isZero (exprNode e)
1148{
1149 if (exprNode_isDefined (e))
1150 {
1151 multiVal m = exprNode_getValue (e);
1152
1153 if (multiVal_isInt (m))
1154 {
1155 return (multiVal_forceInt (m) == 0);
1156 }
1157 }
1158
1159 return FALSE;
1160}
1161
1162static bool
1163exprNode_isNonNegative (exprNode e)
1164{
1165 if (exprNode_isDefined (e))
1166 {
1167 multiVal m = exprNode_getValue (e);
1168
1169 if (multiVal_isInt (m))
1170 {
1171 return (multiVal_forceInt (m) >= 0);
1172 }
a956d444 1173
1174 /*
1175 ** This is not always true if programmer defines enum
1176 ** values, but then the constant should be known.
1177 */
1178
1179 if (ctype_isEnum (ctype_realType (e->typ)))
1180 {
1181 return TRUE;
1182 }
616915dd 1183 }
1184
1185 return FALSE;
1186}
1187
1188/*
1189** a[x] - uses a but NOT a[]
1190** result sref = a[] (set/use in assignment)
1191**
1192** The syntax x[a] is also legal in C, and has the same
1193** semantics. If ind is an array, and arr is an int, flip
1194** the arguments.
1195*/
1196
1197/*@only@*/ exprNode
1198exprNode_arrayFetch (/*@only@*/ exprNode e1, /*@only@*/ exprNode e2)
1199{
1200 /*
1201 ** error in arr, error propagates (no new messages)
1202 ** error in ind, assume valid and continue
1203 */
1204
68de3f33 1205 DPRINTF (("Array fetch: %s / %s",
1206 exprNode_unparse (e1), exprNode_unparse (e2)));
1207
616915dd 1208 if (exprNode_isError (e1))
1209 {
1210 exprNode_free (e2);
1211 return (exprNode_makeError ());
1212 }
1213 else
1214 {
1215 exprNode arr;
1216 exprNode ind;
1217 ctype carr = exprNode_getType (e1);
1218 ctype crarr = ctype_realType (carr);
1219
1220 /*
1221 ** this sets up funny aliasing, that leads to spurious
1b8ae690 1222 ** splint errors. Hence, the i2 comments.
616915dd 1223 */
1224
68de3f33 1225 /* evans 2001-09-09 added ctype_isKnown so there is no swap when e1 type is unknown */
1226 if (ctype_isKnown (crarr)
1227 && !ctype_isRealArray (crarr)
616915dd 1228 && ctype_isRealNumeric (crarr)
1229 && !exprNode_isError (e2)
1230 && ctype_isRealAP (exprNode_getType (e2))) /* fetch like 3[a] */
1231 {
1232 arr = e2;
1233 ind = e1;
1234
1235 carr = exprNode_getType (arr);
1236 crarr = ctype_realType (carr);
1237 }
1238 else
1239 {
1240 arr = e1;
1241 ind = e2;
1242 }
1243
68de3f33 1244 DPRINTF (("arr: %s", exprNode_unparse (arr)));
1245
616915dd 1246 if (sRef_possiblyNull (arr->sref))
1247 {
1248 if (!usymtab_isGuarded (arr->sref))
1249 {
edad9a7f 1250 if (!context_inSizeof() )
616915dd 1251 {
edad9a7f 1252 if (optgenerror (FLG_NULLDEREF,
1253 message ("Index of %s pointer %q: %s",
1254 sRef_nullMessage (arr->sref),
1255 sRef_unparse (arr->sref),
1256 exprNode_unparse (arr)),
1257 arr->loc))
1258 {
1259 DPRINTF (("ref: %s", sRef_unparseFull (arr->sref)));
1260 sRef_showNullInfo (arr->sref);
1261
1262 /* suppress future messages */
1263 sRef_setNullError (arr->sref);
1264 }
616915dd 1265 }
1266 }
1267 }
1268
1269 if (exprNode_isError (ind))
1270 {
1271 if ((ctype_isArrayPtr (crarr)
1272 && !ctype_isFunction (crarr))
1273 || ctype_isUnknown (carr))
1274 {
1275 exprNode ret = exprNode_createPartialCopy (arr);
1276
1277 if (ctype_isKnown (carr))
1278 {
1279 ret->typ = ctype_baseArrayPtr (crarr);
1280 }
1281 else
1282 {
1283 ret->typ = ctype_unknown;
1284 }
1285
1286 ret->sref = sRef_makeArrayFetch (arr->sref);
1287
1288 ret->kind = XPR_FETCH;
1289
1290 /*
1291 ** Because of funny aliasing (when arr and ind are
1292 ** flipped) spurious errors would be reported here.
1293 */
1294
1295 /*@i2@*/ ret->edata = exprData_makePair (arr, ind);
1296 checkSafeUse (ret, arr->sref);
1297 return (ret);
1298 }
1299 else
1300 {
1301 voptgenerror (FLG_TYPE,
1302 message ("Array fetch from non-array (%t): %s[%s]", carr,
1303 exprNode_unparse (e1), exprNode_unparse (e2)),
1304 arr->loc);
1305 exprNode_free (arr);
1306 return (exprNode_makeError ());
1307 }
1308 }
1309 else
1310 {
1311 if (!ctype_isForceRealInt (&(ind->typ)))
1312 {
1313 ctype rt = ctype_realType (ind->typ);
1314
1315 if (ctype_isChar (rt))
1316 {
1317 vnoptgenerror
1318 (FLG_CHARINDEX,
1319 message ("Array fetch using non-integer, %t: %s[%s]",
1320 ind->typ,
1321 exprNode_unparse (e1), exprNode_unparse (e2)),
1322 arr->loc);
1323 }
1324 else if (ctype_isEnum (rt))
1325 {
1326 vnoptgenerror
1327 (FLG_ENUMINDEX,
1328 message ("Array fetch using non-integer, %t: %s[%s]",
1329 ind->typ,
1330 exprNode_unparse (e1), exprNode_unparse (e2)),
1331 arr->loc);
1332 }
b73d1009 1333 else if (ctype_isNumAbstract (rt))
1334 {
1335 vnoptgenerror
1336 (FLG_NUMABSTRACTINDEX,
1337 message ("Array fetch using numabstract type, %t: %s[%s]",
1338 ind->typ,
1339 exprNode_unparse (e1), exprNode_unparse (e2)),
1340 arr->loc);
1341 }
616915dd 1342 else
1343 {
1344 voptgenerror
1345 (FLG_TYPE,
1346 message ("Array fetch using non-integer, %t: %s[%s]",
1347 ind->typ,
1348 exprNode_unparse (e1), exprNode_unparse (e2)),
1349 arr->loc);
1350 }
1351
1352 multiVal_free (ind->val);
1353 ind->val = multiVal_unknown ();
1354 }
1355
1356 if (ctype_isArrayPtr (crarr) && !ctype_isFunction (crarr))
1357 {
1358 exprNode ret = exprNode_createSemiCopy (arr);
1359 multiVal m = exprNode_getValue (ind);
1360
1361 ret->typ = ctype_baseArrayPtr (crarr);
1362 ret->kind = XPR_FETCH;
1363
1364 if (multiVal_isInt (m))
1365 {
1366 int i = (int) multiVal_forceInt (m);
1367
1368 if (sRef_isValid (arr->sref)) {
1369 ret->sref = sRef_makeArrayFetchKnown (arr->sref, i);
1370 } else {
1371 ret->sref = sRef_undefined;
1372 }
1373 }
1374 else
1375 {
28bf4b0b 1376 ret->sref = sRef_makeArrayFetch (arr->sref);
616915dd 1377 }
1378
1379 ret->sets = sRefSet_realNewUnion (arr->sets, ind->sets);
1380 ret->msets = sRefSet_realNewUnion (arr->msets, ind->msets);
1381 ret->uses = sRefSet_realNewUnion (arr->uses, ind->uses);
1382
1383 /* (see comment on spurious errors above) */
1384 /*@i2@*/ ret->edata = exprData_makePair (arr, ind);
1385
1386 exprNode_checkUse (ret, ind->sref, ind->loc);
1387 exprNode_checkUse (ret, arr->sref, arr->loc);
1388
1389 return (ret);
1390 }
1391 else
1392 {
1393 if (ctype_isUnknown (carr))
1394 {
1395 exprNode ret = exprNode_createPartialCopy (arr);
1396
1397 ret->kind = XPR_FETCH;
1398 ret->typ = ctype_unknown;
1399 ret->sets = sRefSet_union (ret->sets, ind->sets);
1400 ret->msets = sRefSet_union (ret->msets, ind->msets);
1401 ret->uses = sRefSet_union (ret->uses, ind->uses);
1402
1403 /* (see comment on spurious errors above) */
1404 /*@i2@*/ ret->edata = exprData_makePair (arr, ind);
1405
1406 exprNode_checkUse (ret, ind->sref, ind->loc);
1407 exprNode_checkUse (ret, arr->sref, arr->loc);
1408 return (ret);
1409 }
1410 else
1411 {
1412 voptgenerror
1413 (FLG_TYPE,
1414 message ("Array fetch from non-array (%t): %s[%s]", carr,
1415 exprNode_unparse (e1), exprNode_unparse (e2)),
1416 arr->loc);
1417
1418 exprNode_free (arr);
1419 exprNode_free (ind);
1420
1421 return (exprNode_makeError ());
1422 }
1423 }
1424 }
1425 }
1426 BADEXIT;
1427}
1428
1429
1430static int
1431checkArgs (uentry fcn, /*@dependent@*/ exprNode f, ctype t,
1432 exprNodeList args, exprNode ret)
1433{
1434 return (checkArgsReal (fcn, f, ctype_argsFunction (t), args, FALSE, ret));
1435}
1436
1437/*
1438** checkPrintfArgs --- checks arguments for printf-like functions
1439** Arguments before ... have already been checked.
1440** The argument before the ... is a char *.
1441** argno is the format string argument.
1442*/
1443
1444static void
1445checkPrintfArgs (/*@notnull@*/ /*@dependent@*/ exprNode f, uentry fcn,
1446 exprNodeList args, exprNode ret, int argno)
1447{
1448 /*
1449 ** the last argument before the elips is the format string
1450 */
1451
1452 int i = argno;
1453 fileloc formatloc;
1454 int nargs = exprNodeList_size (args);
1455 uentryList params = uentry_getParams (fcn);
1456 exprNode a;
1457
1458 /*
1459 ** These should be ensured by checkSpecialFunction
1460 */
1461
1462 llassert (uentryList_size (params) == argno + 1);
1463 llassert (uentry_isElipsisMarker (uentryList_getN (params, argno)));
1464
1465 a = exprNodeList_getN (args, argno - 1);
1466 formatloc = fileloc_copy (exprNode_loc (a));
1467
1468 if (exprNode_isDefined (a) && exprNode_isStringLiteral (a)
1469 && exprNode_knownStringValue (a))
1470 {
1471 char *format = cstring_toCharsSafe (multiVal_forceString (exprNode_getValue (a)));
1472 char *code = format;
1473 char *ocode = code;
1474
1475 nargs = exprNodeList_size (args);
1476
1477 while ((code = strchr (code, '%')) != NULL)
1478 {
1479 char *origcode = code;
28bf4b0b 1480 cstring codetext = cstring_newEmpty ();
616915dd 1481 char key = *(++code);
1482 ctype modtype = ctype_int;
1483 bool modified = FALSE;
1484
1485 fileloc_addColumn (formatloc, code - ocode);
1486
28bf4b0b 1487 codetext = cstring_appendChar (codetext, key);
1488
616915dd 1489 /* ignore flags */
1490 while (isFlagKey (key))
1491 {
1492 key = *(++code);
28bf4b0b 1493 codetext = cstring_appendChar (codetext, key);
616915dd 1494 fileloc_incColumn (formatloc);
1495 }
1496
1497 if (key == 'm') /* skipped in syslog */
1498 {
1499 continue;
1500 }
1501
1502 /* ignore field width */
1503 while (isdigit ((int) key) != 0)
1504 {
1505 key = *(++code);
28bf4b0b 1506 codetext = cstring_appendChar (codetext, key);
616915dd 1507 fileloc_incColumn (formatloc);
1508 }
1509
1510 /* ignore precision */
1511 if (key == '.')
1512 {
1513 key = *(++code);
28bf4b0b 1514 codetext = cstring_appendChar (codetext, key);
616915dd 1515 fileloc_incColumn (formatloc);
1516
1517 /*
1518 ** In printf, '*' means: read the next arg as an int for the
1519 ** field width. This seems to be missing from my copy of the
1520 ** standard x3.159-1989. Setion 4.9.6.1 refers to * (described
1521 ** later) but never does.
1522 */
1523
1524 if (key == '*')
1525 {
1526 ; /* don't do anything --- handle later */
1527 }
1528 else
1529 {
1530 while (isdigit ((int) key) != 0)
1531 {
1532 key = *(++code);
28bf4b0b 1533 codetext = cstring_appendChar (codetext, key);
616915dd 1534 fileloc_incColumn (formatloc);
1535 }
1536 }
1537 }
1538
1539 if (key == 'h')
1540 {
1541 modtype = ctype_sint; /* short */
1542 key = *(++code);
28bf4b0b 1543 codetext = cstring_appendChar (codetext, key);
616915dd 1544 fileloc_incColumn (formatloc);
1545 }
1546 else if (key == 'l' || key == 'L')
1547 {
1548 modtype = ctype_lint; /* long */
1549 key = *(++code);
28bf4b0b 1550 codetext = cstring_appendChar (codetext, key);
616915dd 1551 fileloc_incColumn (formatloc);
1552
1553 if (key == 'l' || key == 'L') {
1554 modtype = ctype_llint; /* long long */
1555 key = *(++code);
28bf4b0b 1556 codetext = cstring_appendChar (codetext, key);
616915dd 1557 fileloc_incColumn (formatloc);
1558 }
1559 }
1560 else
1561 {
1562 ; /* no modifier */
1563 }
1564
1565 /* now, key = type of conversion to apply */
1566 ++code;
1567 fileloc_incColumn (formatloc);
1568
1569 if (key != '%')
1570 {
1571 if (i >= nargs)
1572 {
1573 if (optgenerror
1574 (FLG_TYPE,
1575 message ("No argument corresponding to %q format "
28bf4b0b 1576 "code %d (%%%s): \"%s\"",
616915dd 1577 uentry_getName (fcn),
28bf4b0b 1578 i, codetext,
616915dd 1579 cstring_fromChars (format)),
1580 f->loc))
1581 {
1582 if (fileloc_isDefined (formatloc)
1583 && context_getFlag (FLG_SHOWCOL))
1584 {
1585 llgenindentmsg (cstring_makeLiteral ("Corresponding format code"),
1586 formatloc);
1587 }
1588 }
1589 i++;
1590 }
1591 else
1592 {
1593 a = exprNodeList_getN (args, i);
1594 i++;
1595
1596 if (!exprNode_isError (a))
1597 {
1598 ctype expecttype;
1599
1600 switch (key)
1601 {
1602 case '*': /* int argument for fieldwidth */
1603 expecttype = ctype_int;
1604 *(--code) = '%'; /* convert it for next code */
1605 fileloc_subColumn (formatloc, 1);
1606 /*@switchbreak@*/ break;
1607 case 'u':
1608 case 'o':
1609 expecttype = ctype_combine (ctype_uint, modtype);
1610 /*@switchbreak@*/ break;
1611
1612 case 'i': /* int argument */
1613 case 'd':
1614 expecttype = ctype_combine (ctype_int, modtype);
1615 /*@switchbreak@*/ break;
1616
28bf4b0b 1617 case 'x': /* unsigned int */
616915dd 1618 case 'X':
28bf4b0b 1619 expecttype = ctype_combine (ctype_uint, modtype);
1620
616915dd 1621 /*@switchbreak@*/ break;
1622
1623 case 'e':
1624 case 'E':
1625 case 'g':
1626 case 'G':
1627 case 'f': /* double */
1628 expecttype = ctype_combine (ctype_double, modtype);
1629 /*@switchbreak@*/ break;
1630
1631 case 'c': /* int converted to char (check its a char?) */
2209bcb7 1632 expecttype = ctype_makeConj (ctype_int,
1633 ctype_makeConj (ctype_char,
1634 ctype_uchar));
2209bcb7 1635 /* evans 2001-10-05 - changed to reflect correct ISO spec:
1636 int converted to char */
1637
616915dd 1638 /*@switchbreak@*/ break;
1639
1640 case 's': /* string */
1641 expecttype = ctype_string;
1642 /*@switchbreak@*/ break;
1643 case '[':
1644 /* skip to ']' */
1645 while (((key = *(++code)) != ']')
1646 && (key != '\0'))
1647 {
28bf4b0b 1648 codetext = cstring_appendChar (codetext, key);
616915dd 1649 fileloc_incColumn (formatloc);
1650 }
1651
1652 if (key == '\0')
1653 {
1654 llfatalerrorLoc
1655 (message ("Bad character set format: %s",
1656 cstring_fromChars (origcode)));
1657 }
1658
1659 expecttype = ctype_string;
1660 /*@switchbreak@*/ break;
1661
1662 case 'p': /* pointer */
1663 expecttype = ctype_makePointer (ctype_void);
393e573f 1664 /* need not be defined */
1665 uentry_setDefState (regArg, SS_RELDEF);
1666 sRef_setPosNull (uentry_getSref (regArg),
1667 fileloc_undefined);
1668 /* could be null */
616915dd 1669 /*@switchbreak@*/ break;
1670
1671 case 'n': /* pointer to int, modified by call! */
1672 expecttype = ctype_combine (ctype_makePointer (ctype_int), modtype);
1673 modified = TRUE;
1674 uentry_setDefState (regArg, SS_ALLOCATED); /* corresponds to out */
1675 /*@switchbreak@*/ break;
1676
1677 case 'm': /* in a syslog, it doesn't consume an argument */
1678 /* should check we're really doing syslog */
1679
1680 /*@switchbreak@*/ break;
1681
1682
1683 default:
1684 expecttype = ctype_unknown;
1685
1686 voptgenerror
1687 (FLG_FORMATCODE,
1688 message ("Unrecognized format code: %s",
1689 cstring_fromChars (origcode)),
1690 fileloc_isDefined (formatloc)
1691 ? formatloc : g_currentloc);
1692
1693 /*@switchbreak@*/ break;
1694 }
1695
1696 if (!(exprNode_matchArgType (expecttype, a)))
1697 {
1698 if (ctype_isVoidPointer (expecttype)
1699 && ctype_isRealAbstract (a->typ)
1700 && (context_getFlag (FLG_ABSTVOIDP)))
1701 {
1702 ;
1703 }
1704 else
1705 {
1706 if (llgenformattypeerror
1707 (expecttype, exprNode_undefined,
1708 a->typ, a,
28bf4b0b 1709 message ("Format argument %d to %q (%%%s) expects "
616915dd 1710 "%t gets %t: %s",
1711 i - argno,
1712 uentry_getName (fcn),
28bf4b0b 1713 codetext,
1714 expecttype,
616915dd 1715 a->typ, exprNode_unparse (a)),
1716 a->loc))
1717 {
1718 if (fileloc_isDefined (formatloc)
1719 && context_getFlag (FLG_SHOWCOL))
1720 {
1721 llgenindentmsg
1722 (cstring_makeLiteral
1723 ("Corresponding format code"),
1724 formatloc);
1725 }
1726 }
1727 }
1728 }
1729
1730 uentry_setType (regArg, expecttype);
1731 checkOneArg (regArg, a, f, FALSE, i+1, nargs);
1732
1733 if (ctype_equal (expecttype, ctype_string))
1734 {
1735 exprNode_checkUse (a, sRef_makePointer (a->sref), a->loc);
1736 }
1737
1738 uentry_setType (regArg, ctype_unknown);
1739 uentry_fixupSref (regArg);
346fab44 1740
616915dd 1741 if (modified)
1742 {
1743 exprNode_checkCallModifyVal (a->sref, args, f, ret);
1744 }
1745 }
1746 else
1747 {
1748 ;
1749 }
1750 }
1751 }
28bf4b0b 1752
616915dd 1753 ocode = code;
28bf4b0b 1754 cstring_free (codetext);
616915dd 1755 }
1756
1757 if (i < nargs)
1758 {
1759 voptgenerror (FLG_TYPE,
28bf4b0b 1760 message ("Format string for %q has %d arg%&, given %d",
616915dd 1761 uentry_getName (fcn), i - argno, nargs - argno),
1762 f->loc);
1763 }
1764 }
1765 else
1766 {
1767 /* no checking possible for compile-time unknown format strings */
28bf4b0b 1768 if (exprNode_isDefined (a))
1769 {
1770 voptgenerror
1771 (FLG_FORMATCONST,
1772 message ("Format string parameter to %s is not a compile-time constant: %s",
1773 exprNode_unparse (f),
1774 exprNode_unparse (a)),
1775 f->loc);
1776 }
616915dd 1777 }
28bf4b0b 1778
616915dd 1779 fileloc_free (formatloc);
1780}
1781
1782static void
1783checkScanfArgs (/*@notnull@*/ /*@dependent@*/ exprNode f, uentry fcn,
1784 exprNodeList args, exprNode ret, int argno)
1785{
1786 int i = argno;
1787 fileloc formatloc;
1788 int nargs = exprNodeList_size (args);
1789 uentryList params = uentry_getParams (fcn);
1790 exprNode a;
1791
1792 /*
1793 ** These should be ensured by checkSpecialFunction
1794 */
1795
1796 llassert (uentryList_size (params) == argno + 1);
1797 llassert (uentry_isElipsisMarker (uentryList_getN (params, argno)));
1798
1799 a = exprNodeList_getN (args, argno - 1);
1800 formatloc = fileloc_copy (exprNode_loc (a));
1801
1802 if (exprNode_isDefined (a) && exprNode_isStringLiteral (a)
1803 && exprNode_knownStringValue (a))
1804 {
1805 char *format = cstring_toCharsSafe (multiVal_forceString (exprNode_getValue (a)));
1806 char *code = format;
1807 char *ocode = code;
1808
1809 nargs = exprNodeList_size (args);
1810
1811 while ((code = strchr (code, '%')) != NULL)
1812 {
1813 char *origcode = code;
1814 char key = *(++code);
28bf4b0b 1815 cstring codetext = cstring_newEmpty ();
616915dd 1816 ctype modtype = ctype_int;
1817 char modifier = '\0';
1818 bool modified = TRUE;
1819 bool ignore = FALSE;
1820
28bf4b0b 1821 codetext = cstring_appendChar (codetext, key);
616915dd 1822 fileloc_addColumn (formatloc, code - ocode);
1823
1824 /*
1825 ** this is based on ANSI standard library description of fscanf
1826 ** (from ANSI standard X3.159-1989, 4.9.6.1)
1827 */
1828
1829 /* '*' suppresses assignment (does not need match argument) */
1830
1831 if (key == '*')
1832 {
1833 key = *(++code);
28bf4b0b 1834 codetext = cstring_appendChar (codetext, key);
616915dd 1835 modified = FALSE;
1836 ignore = TRUE;
1837 fileloc_incColumn (formatloc);
1838 }
1839
1840 /* ignore field width */
1841 while (isdigit ((int) key) != 0)
1842 {
1843 key = *(++code);
28bf4b0b 1844 codetext = cstring_appendChar (codetext, key);
616915dd 1845 fileloc_incColumn (formatloc);
1846 }
1847
1848 if (key == 'h')
1849 {
1850 modtype = ctype_sint; /* short */
1851 key = *(++code);
28bf4b0b 1852 codetext = cstring_appendChar (codetext, key);
616915dd 1853 fileloc_incColumn (formatloc);
1854 }
1855 else if (key == 'l' || key == 'L')
1856 {
1857 modtype = ctype_lint; /* long */
1858 modifier = key;
1859
1860 key = *(++code);
28bf4b0b 1861 codetext = cstring_appendChar (codetext, key);
1862
616915dd 1863 fileloc_incColumn (formatloc);
1864
1865 if (key == 'l' || key == 'L') {
1866 modtype = ctype_llint; /* long long */
1867 key = *(++code);
28bf4b0b 1868 codetext = cstring_appendChar (codetext, key);
616915dd 1869 fileloc_incColumn (formatloc);
1870 }
1871 }
1872 else
1873 {
1874 ; /* no modifier */
1875 }
1876
1877 /* now, key = type of conversion to apply */
1878 ++code;
1879 fileloc_incColumn (formatloc);
1880
1881 if (key != '%')
1882 {
1883 if (ignore)
1884 {
1885 ;
1886 }
1887 else
1888 {
1889 if (i >= nargs)
1890 {
1891 if (optgenerror
1892 (FLG_TYPE,
1893 message ("No argument corresponding to %q format "
28bf4b0b 1894 "code %d (%%%s): \"%s\"",
616915dd 1895 uentry_getName (fcn),
28bf4b0b 1896 i, codetext,
616915dd 1897 cstring_fromChars (format)),
1898 f->loc))
1899 {
1900 if (fileloc_isDefined (formatloc)
1901 && context_getFlag (FLG_SHOWCOL))
1902 {
1903 llgenindentmsg
1904 (cstring_makeLiteral ("Corresponding format code"),
1905 formatloc);
1906 }
1907 }
1908 i++;
1909 }
1910 else
1911 {
1912 a = exprNodeList_getN (args, i);
1913 i++;
1914
1915 if (!exprNode_isError (a))
1916 {
1917 ctype expecttype;
1918
1919 switch (key)
1920 {
1921 case '*': /* int argument for fieldwidth */
1922 expecttype = ctype_makePointer (ctype_int);
1923 *(--code) = '%'; /* convert it for next code */
1924 fileloc_subColumn (formatloc, 1);
1925 /*@switchbreak@*/ break;
1926 case 'u':
1927 case 'o':
1928 expecttype = ctype_makePointer (ctype_combine (ctype_uint, modtype));
1929 /*@switchbreak@*/ break;
1930
1931 case 'i':
1932 case 'd':
1933 case 'x':
1934 case 'X': /* unsigned int */
1935 expecttype = ctype_makePointer (ctype_combine (ctype_int, modtype));
1936 /*@switchbreak@*/ break;
1937
1938 case 'e':
1939 case 'E':
1940 case 'g':
1941 case 'G':
1942 case 'f':
1943 /* printf is double, scanf is float! */
1944
1945 if (modifier == 'l')
1946 {
1947 expecttype = ctype_makePointer (ctype_double);
1948 }
1949 else if (modifier == 'L')
1950 {
1951 expecttype = ctype_makePointer (ctype_ldouble);
1952 }
1953 else
1954 {
1955 llassert (modifier == '\0');
1956 expecttype = ctype_makePointer (ctype_float);
1957 }
1958 /*@switchbreak@*/ break;
1959
1960 case 'c': /* int converted to char (check its a char?) */
1961 expecttype = ctype_makePointer (ctype_makeConj (ctype_char, ctype_uchar));
1962 /*@switchbreak@*/ break;
1963
1964 case 's': /* string */
1965 expecttype = ctype_string;
1966 /*@switchbreak@*/ break;
1967
1968 case '[':
1969 /* skip to ']' */
1970 while (((key = *(++code)) != ']')
1971 && (key != '\0'))
1972 {
28bf4b0b 1973 codetext = cstring_appendChar (codetext, key);
616915dd 1974 fileloc_incColumn (formatloc);
1975 }
1976
1977 if (key == '\0')
1978 {
1979 llfatalerrorLoc
1980 (message ("Bad character set format: %s",
1981 cstring_fromChars (origcode)));
1982 }
1983
1984 expecttype = ctype_string;
1985 /*@switchbreak@*/ break;
346fab44 1986
616915dd 1987
1988 case 'p': /* pointer */
346fab44 1989 voptgenerror
1990 (FLG_FORMATCODE,
1991 message ("Format code should not be used in scanf: %s",
1992 cstring_fromChars (origcode)),
1993 fileloc_isDefined (formatloc)
1994 ? formatloc : g_currentloc);
1995
616915dd 1996 expecttype = ctype_unknown;
616915dd 1997 /*@switchbreak@*/ break;
1998
1999 case 'n': /* pointer to int, modified by call! */
2000 expecttype = ctype_makePointer (ctype_int);
2001 /*@switchbreak@*/ break;
2002
2003 default:
2004 expecttype = ctype_unknown;
2005
2006 voptgenerror
2007 (FLG_FORMATCODE,
2008 message ("Unrecognized format code: %s",
2009 cstring_fromChars (origcode)),
2010 fileloc_isDefined (formatloc)
2011 ? formatloc : g_currentloc);
2012
2013 /*@switchbreak@*/ break;
2014 }
2015
2016 if (!(exprNode_matchArgType (expecttype, a)))
2017 {
2018 if (ctype_isVoidPointer (expecttype)
2019 && ctype_isRealAbstract (a->typ)
2020 && (context_getFlag (FLG_ABSTVOIDP)))
2021 {
2022 ;
2023 }
2024 else
2025 {
28bf4b0b 2026 if (llgenformattypeerror
2027 (expecttype, exprNode_undefined,
2028 a->typ, a,
2029 message ("Format argument %d to %q (%%%s) expects "
2030 "%t gets %t: %s",
2031 i - argno,
2032 uentry_getName (fcn),
2033 codetext, expecttype,
2034 a->typ, exprNode_unparse (a)),
2035 a->loc))
616915dd 2036 {
28bf4b0b 2037 if (fileloc_isDefined (formatloc)
2038 && context_getFlag (FLG_SHOWCOL))
616915dd 2039 {
28bf4b0b 2040 llgenindentmsg
2041 (cstring_makeLiteral
2042 ("Corresponding format code"),
2043 formatloc);
616915dd 2044 }
2045 }
2046 }
2047 }
2048
2049 uentry_setType (outArg, expecttype);
2050 checkOneArg (outArg, a, f, FALSE, i+1, nargs);
2051 uentry_setType (outArg, ctype_unknown);
2052 uentry_fixupSref (outArg);
2053
2054 if (modified)
2055 {
2056 exprNode_checkCallModifyVal (a->sref, args, f, ret);
2057 }
2058 }
2059 else
2060 {
02b84d4b 2061 /* a->sref = sRef_undefined; */
616915dd 2062 }
2063 }
2064 }
2065 }
28bf4b0b 2066
616915dd 2067 ocode = code;
28bf4b0b 2068 cstring_free (codetext);
616915dd 2069 }
2070
2071 if (i < nargs)
2072 {
2073 voptgenerror (FLG_TYPE,
28bf4b0b 2074 message ("Format string for %q has %d arg%&, given %d",
616915dd 2075 uentry_getName (fcn), i - argno, nargs - argno),
2076 f->loc);
2077 }
2078 }
2079 else
2080 {
2081 /* no checking possible for compile-time unknown format strings */
2082 }
2083
2084 fileloc_free (formatloc);
2085}
2086
2087static void
2088checkMessageArgs (/*@notnull@*/ /*@dependent@*/ exprNode f,
2089 uentry fcn,
2090 exprNodeList args,
2091 /*@unused@*/ int argno)
2092{
2093 /*
2094 ** the last argument before the elips is the format string
2095 */
2096
2097 int nargs = exprNodeList_size (args);
2098 int i = argno;
2099 fileloc formatloc;
2100 exprNode a;
2101
2102 a = exprNodeList_getN (args, argno - 1);
2103 formatloc = fileloc_copy (exprNode_loc (a));
2104
2105 if (ctype_isUnknown (cstringType)) {
2106 if (usymtab_existsType (cstring_makeLiteralTemp ("cstring")))
2107 {
2108 cstringType = usymtab_lookupAbstractType (cstring_makeLiteralTemp ("cstring"));
2109 }
2110 }
2111
2112 if (ctype_isUnknown (ctypeType)) {
2113 if (usymtab_existsType (cstring_makeLiteralTemp ("ctype")))
2114 {
2115 ctypeType = usymtab_lookupAbstractType (cstring_makeLiteralTemp ("ctype"));
2116 }
2117 }
2118
2119 if (ctype_isUnknown (filelocType)) {
2120 if (usymtab_existsType (cstring_makeLiteralTemp ("fileloc")))
2121 {
2122 filelocType = usymtab_lookupAbstractType (cstring_makeLiteralTemp ("fileloc"));
2123 }
2124 }
2125
2126 if (exprNode_isDefined (a) && exprNode_isStringLiteral (a)
2127 && exprNode_knownStringValue (a))
2128 {
2129 cstring format = multiVal_forceString (exprNode_getValue (a));
2130 char *code = cstring_toCharsSafe (format);
2131 char *ocode = code;
2132
2133 nargs = exprNodeList_size (args);
2134
2135 while ((code = strchr (code, '%')) != NULL)
2136 {
2137 char *origcode = code;
2138 char key = *(++code);
28bf4b0b 2139 cstring codetext = cstring_newEmpty ();
616915dd 2140 bool isOnly = FALSE;
2141
28bf4b0b 2142 codetext = cstring_appendChar (codetext, key);
2143
616915dd 2144 fileloc_addColumn (formatloc, code - ocode);
2145
2146 while (key >= '0' && key <= '9')
2147 {
2148 key = *(++code);
28bf4b0b 2149 codetext = cstring_appendChar (codetext, key);
616915dd 2150 fileloc_incColumn (formatloc);
2151 }
2152
2153 ++code;
2154 fileloc_incColumn (formatloc);
2155
2156 if (key != '%')
2157 {
28bf4b0b 2158 if (key == '&') /* plural marker */
616915dd 2159 {
2160 goto nextKey;
2161 }
2162
2163 if (i >= nargs)
2164 {
2165 voptgenerror
2166 (FLG_TYPE,
28bf4b0b 2167 message ("Message missing format arg %d (%%%s): \"%s\"",
2168 i + 1, codetext, format),
616915dd 2169 f->loc);
2170 i++;
2171 }
2172 else
2173 {
2174 a = exprNodeList_getN (args, i);
2175 i++;
2176
2177 nextKey:
2178 if (!exprNode_isError (a))
2179 {
2180 ctype expecttype;
2181
2182 /*@-loopswitchbreak@*/
2183
2184 switch (key)
2185 {
2186 case 'c':
2187 case 'h':
2188 expecttype = ctype_char; break;
2189 case 's':
2190 expecttype = cstringType; break;
2191 case 'q':
2192 expecttype = cstringType; isOnly = TRUE; break;
2193 case 'x':
2194 expecttype = cstringType; isOnly = TRUE; break;
2195 case 'd': expecttype = ctype_int; break;
2196 case 'u': expecttype = ctype_uint; break;
2197 case 'w': expecttype = ctype_ulint; break;
2198 case 'f': expecttype = ctype_float; break;
2199 case 'b': expecttype = ctype_bool; break;
2200 case 't': expecttype = ctypeType; break;
393e573f 2201 case 'p':
2202 expecttype = ctype_makePointer (ctype_void);
2203 /* need not be defined */
2204 uentry_setDefState (regArg, SS_RELDEF);
2205 sRef_setPosNull (uentry_getSref (regArg),
2206 fileloc_undefined);
2207 /* could be null */
2208 /*@switchbreak@*/ break;
616915dd 2209 case 'l': expecttype = filelocType; break;
28bf4b0b 2210 case '&': /* a wee bit of a hack methinks */
616915dd 2211 expecttype = ctype_int;
2212 break;
2213 case 'r': expecttype = ctype_bool; break;
2214 default:
2215 expecttype = ctype_unknown;
2216 voptgenerror
2217 (FLG_FORMATCODE,
2218 message ("Unrecognized format code: %s",
2219 cstring_fromChars (origcode)),
2220 fileloc_isDefined (formatloc)
2221 ? formatloc : g_currentloc);
2222 break;
2223 }
2224 /*@=loopswitchbreak@*/
2225
2226 if (!(exprNode_matchArgType (expecttype, a)))
2227 {
2228 if (ctype_isVoidPointer (expecttype)
2229 && ctype_isRealAbstract (a->typ)
2230 && (context_getFlag (FLG_ABSTVOIDP)))
2231 {
2232 ;
2233 }
2234 else
2235 {
2236 if (llgenformattypeerror
2237 (expecttype, exprNode_undefined,
2238 a->typ, a,
28bf4b0b 2239 message ("Format argument %d to %q (%%%s) expects "
616915dd 2240 "%t gets %t: %s",
2241 i - argno,
2242 uentry_getName (fcn),
28bf4b0b 2243 codetext, expecttype,
616915dd 2244 a->typ, exprNode_unparse (a)),
2245 a->loc))
b73d1009 2246 {
616915dd 2247 if (fileloc_isDefined (formatloc)
2248 && context_getFlag (FLG_SHOWCOL))
2249 {
2250 llgenindentmsg
2251 (cstring_makeLiteral
2252 ("Corresponding format code"),
2253 formatloc);
2254 }
2255 }
2256 }
2257 }
2258
2259 if (ctype_equal (expecttype, cstringType))
2260 {
2261 if (isOnly)
2262 {
2263 checkOneArg (csOnlyArg, a, f, FALSE, i+1, nargs);
2264 uentry_fixupSref (csOnlyArg);
2265 }
2266 else
2267 {
2268 checkOneArg (csArg, a, f, FALSE, i+1, nargs);
2269 uentry_fixupSref (csArg);
2270 }
2271 }
2272 else
2273 {
2274 checkOneArg (regArg, a, f, FALSE, i+1, nargs);
2275 uentry_fixupSref (regArg);
2276 }
2277 }
2278 }
2279 }
28bf4b0b 2280
2281 cstring_free (codetext);
616915dd 2282 }
2283
2284 if (i < nargs)
2285 {
2286 voptgenerror (FLG_TYPE,
28bf4b0b 2287 message ("Format string for %q has %d arg%&, given %d",
616915dd 2288 uentry_getName (fcn), i - argno, nargs -argno),
2289 f->loc);
2290 }
2291 }
2292 else
2293 {
2294 /* no checking possible for compile-time unknown format strings */
2295 }
2296
2297 fileloc_free (formatloc);
2298}
2299
2300static void
2301 checkExpressionDefinedAux (/*@notnull@*/ exprNode e1,
2302 /*@notnull@*/ exprNode e2,
2303 sRefSet sets1,
2304 sRefSet sets2,
2305 lltok op,
2306 flagcode flag)
2307{
2308 bool hadUncon = FALSE;
2309
28bf4b0b 2310 if (sRef_isFileOrGlobalScope (sRef_getRootBase (e1->sref)) &&
616915dd 2311 sRefSet_hasUnconstrained (sets2))
2312 {
2313 voptgenerror
2314 (FLG_EVALORDERUNCON,
2315 message
2316 ("Expression may have undefined behavior (%q used in right operand "
2317 "may set global variable %q used in left operand): %s %s %s",
2318 sRefSet_unparseUnconstrained (sets2),
2319 sRef_unparse (sRef_getRootBase (e1->sref)),
2320 exprNode_unparse (e1), lltok_unparse (op), exprNode_unparse (e2)),
2321 e2->loc);
2322 }
2323
28bf4b0b 2324 if (sRef_isFileOrGlobalScope (sRef_getRootBase (e2->sref)) &&
616915dd 2325 sRefSet_hasUnconstrained (sets1))
2326 {
2327 voptgenerror
2328 (FLG_EVALORDERUNCON,
2329 message
2330 ("Expression has undefined behavior (%q used in left operand "
2331 "may set global variable %q used in right operand): %s %s %s",
2332 sRefSet_unparseUnconstrained (sets1),
2333 sRef_unparse (e2->sref),
2334 exprNode_unparse (e1), lltok_unparse (op), exprNode_unparse (e2)),
2335 e2->loc);
2336 }
2337
2338 sRefSet_realElements (e1->uses, sr)
2339 {
2340 if (sRef_isMeaningful (sr) && sRefSet_member (sets2, sr))
2341 {
2342 voptgenerror
2343 (FLG_EVALORDER,
2344 message
2345 ("Expression has undefined behavior (left operand uses %q, "
2346 "modified by right operand): %s %s %s",
2347 sRef_unparse (sr),
2348 exprNode_unparse (e1), lltok_unparse (op), exprNode_unparse (e2)),
2349 e2->loc);
2350 }
2351 } end_sRefSet_realElements;
2352
2353 sRefSet_realElements (sets1, sr)
2354 {
2355 if (sRef_isMeaningful (sr))
2356 {
2357 if (sRef_same (sr, e2->sref))
2358 {
2359 voptgenerror
2360 (flag,
2361 message
2362 ("Expression has undefined behavior (value of right operand "
2363 "modified by left operand): %s %s %s",
2364 exprNode_unparse (e1), lltok_unparse (op), exprNode_unparse (e2)),
2365 e2->loc);
2366 }
2367 else if (sRefSet_member (e2->uses, sr))
2368 {
2369 voptgenerror
2370 (flag,
2371 message
2372 ("Expression has undefined behavior (left operand modifies %q, "
2373 "used by right operand): %s %s %s",
2374 sRef_unparse (sr),
2375 exprNode_unparse (e1), lltok_unparse (op), exprNode_unparse (e2)),
2376 e2->loc);
2377 }
2378 else
2379 {
2380 if (sRefSet_member (sets2, sr))
2381 {
2382 if (sRef_isUnconstrained (sr))
2383 {
2384 if (hadUncon)
2385 {
2386 ;
2387 }
2388 else
2389 {
2390 hadUncon = optgenerror
2391 (FLG_EVALORDERUNCON,
2392 message
2393 ("Expression may have undefined behavior. Left operand "
2394 "calls %q; right operand calls %q. The unconstrained "
2395 "functions may modify global state used by "
2396 "the other operand): %s %s %s",
2397 sRefSet_unparseUnconstrained (sets1),
2398 sRefSet_unparseUnconstrained (sets2),
2399 exprNode_unparse (e1), lltok_unparse (op),
2400 exprNode_unparse (e2)),
2401 e2->loc);
2402 }
2403 }
2404 else
2405 {
2406 voptgenerror
2407 (flag,
2408 message
2409 ("Expression has undefined behavior (both "
2410 "operands modify %q): %s %s %s",
2411 sRef_unparse (sr),
2412 exprNode_unparse (e1),
2413 lltok_unparse (op), exprNode_unparse (e2)),
2414 e2->loc);
2415 }
2416 }
2417 }
2418 }
2419 } end_sRefSet_realElements;
2420}
2421
2422static void checkExpressionDefined (exprNode e1, exprNode e2, lltok op)
2423{
2424 bool hasError = FALSE;
2425
2426 if (exprNode_isError (e1) || exprNode_isError (e2))
2427 {
2428 return;
2429 }
2430
2431 if (sRefSet_member (e2->sets, e1->sref))
2432 {
2433 if (e2->kind == XPR_CALL)
2434 {
2435 ;
2436 }
2437 else
2438 {
2439 hasError = optgenerror
2440 (FLG_EVALORDER,
2441 message ("Expression has undefined behavior "
ccf0a4a8 2442 "(value of left operand %s is modified "
2443 "by right operand %s): %s %s %s",
2444 exprNode_unparse (e1),
2445 exprNode_unparse (e2),
616915dd 2446 exprNode_unparse (e1), lltok_unparse (op),
2447 exprNode_unparse (e2)),
2448 e2->loc);
2449 }
2450 }
2451
2452 if (context_getFlag (FLG_EVALORDERUNCON))
2453 {
2454 if (sRefSet_member (e2->msets, e1->sref))
2455 {
2456 if (e2->kind == XPR_CALL)
2457 {
2458 ;
2459 }
2460 else
2461 {
2462 hasError = optgenerror
2463 (FLG_EVALORDER,
2464 message
2465 ("Expression has undefined behavior (value of left "
2466 "operand may be modified by right operand): %s %s %s",
2467 exprNode_unparse (e1), lltok_unparse (op),
2468 exprNode_unparse (e2)),
2469 e2->loc);
2470 }
2471 }
2472 }
2473
2474 if (!hasError)
2475 {
2476 checkExpressionDefinedAux (e1, e2, e1->sets, e2->sets, op, FLG_EVALORDER);
2477
2478 if (context_maybeSet (FLG_EVALORDERUNCON))
2479 {
2480 checkExpressionDefinedAux (e1, e2, e1->msets,
2481 e2->msets, op, FLG_EVALORDERUNCON);
2482 }
2483 }
2484}
2485
2486static void checkSequencing (exprNode p_f, exprNodeList p_args);
2487
2488static int
2489 checkArgsReal (uentry fcn, /*@dependent@*/ exprNode f, uentryList cl,
2490 exprNodeList args, bool isIter, exprNode ret)
2491{
2492 int special = 0;
2493
2494 if (!exprNode_isError (f))
2495 {
2496 if (!uentryList_isMissingParams (cl))
2497 {
2498 int nargs = exprNodeList_size (args);
2499 int expectargs = uentryList_size (cl);
2500 ctype last;
2501 int i = 0;
2502
2503 if (expectargs == 0)
2504 {
2505 if (nargs != 0)
2506 {
2507 if (isIter)
2508 {
2509 voptgenerror
2510 (FLG_TYPE,
2511 message ("Iter %q invoked with %d args, "
2512 "declared void",
2513 uentry_getName (fcn),
2514 nargs),
2515 f->loc);
2516 }
2517 else
2518 {
2519 voptgenerror
2520 (FLG_TYPE,
2521 message ("Function %s called with %d args, "
2522 "declared void",
2523 exprNode_unparse (f), nargs),
2524 f->loc);
2525 }
2526 }
2527 return special;
2528 }
2529
2530 last = uentry_getType (uentryList_getN (cl, expectargs - 1));
2531
2532 exprNodeList_reset (args);
2533
2534 uentryList_elements (cl, current)
2535 {
2536 ctype ct = uentry_getType (current);
2537 exprNode a;
2538
2539 if (ctype_isElips (ct))
2540 {
2541 /*
2542 ** do special checking for printf/scanf library functions
2543 **
2544 ** this is kludgey code, just for handling the special case
2545 **
2546 */
2547
2548 if (uentry_isPrintfLike (fcn))
2549 {
2550 checkPrintfArgs (f, fcn, args, ret, i);
2551 special = i;
2552 }
2553 else if (uentry_isScanfLike (fcn))
2554 {
2555 checkScanfArgs (f, fcn, args, ret, i);
2556 special = i;
2557 }
2558 else if (uentry_isMessageLike (fcn))
2559 {
2560 checkMessageArgs (f, fcn, args, i);
2561 special = i;
2562 }
2563 else
2564 {
2565 llassert (!uentry_isSpecialFunction (fcn));
2566 }
2567
2568 nargs = expectargs; /* avoid errors */
2569 break;
2570 }
2571 else
2572 {
2573 if (i >= nargs) break;
2574
2575 a = exprNodeList_current (args);
2576 exprNodeList_advance (args);
2577
2578 i++;
2579
2580 if (exprNode_isError (a))
2581 {
2582 ;
2583 }
2584 else
2585 {
2586 /*
2587 probably necessary? I'm not sure about this one
2588 checkMacroParen (a);
2589 */
2590
2591 f->guards = guardSet_union (f->guards, a->guards);
2592
2593 DPRINTF (("match arg: %s / %s", ctype_unparse (ct), ctype_unparse (a->typ)));
2594
2595 if (!(exprNode_matchArgType (ct, a)))
2596 {
2597 DPRINTF (("Args mismatch!"));
2598
2599 if (ctype_isVoidPointer (ct)
2600 && (ctype_isPointer (a->typ)
2601 && (ctype_isRealAbstract (ctype_baseArrayPtr (a->typ)))))
2602 {
2603 vnoptgenerror
2604 (FLG_ABSTVOIDP,
2605 message
2606 ("Pointer to abstract type (%t) used "
2607 "as void pointer "
2608 "(arg %d to %q): %s",
2609 a->typ, i,
2610 uentry_getName (fcn),
2611 exprNode_unparse (a)),
2612 a->loc);
2613 }
2614 else
2615 {
2616 if (isIter)
2617 {
2618 (void) gentypeerror
2619 (ct, exprNode_undefined,
2620 a->typ, a,
2621 message
2622 ("Iter %q expects arg %d to "
2623 "be %t gets %t: %s",
2624 uentry_getName (fcn),
2625 i, ct, a->typ, exprNode_unparse (a)),
2626 a->loc);
2627 }
2628 else
2629 {
2630 if (gentypeerror
2631 (ct,
2632 exprNode_undefined,
2633 a->typ,
2634 a,
2635 message
2636 ("Function %q expects arg %d to be %t gets %t: %s",
2637 uentry_getName (fcn),
2638 i, ct, a->typ, exprNode_unparse (a)),
2639 a->loc))
2640 {
2641 DPRINTF (("Types: %s / %s",
2642 ctype_unparse (ct),
2643 ctype_unparse (a->typ)));
2644 }
2645
2646 /*
2647 ** Clear null marker for abstract types.
2648 ** (It is not revealed, so suppress future messages.)
2649 */
2650
2651 if (ctype_isAbstract (a->typ))
2652 {
2653 sRef_setNullUnknown (exprNode_getSref (a), a->loc);
2654 }
2655 }
2656 }
2657 }
2658 }
2659 }
2660 } end_uentryList_elements ;
2661
2662
2663 if (expectargs != nargs) /* note: not != since we may have ... */
2664 {
2665 if (ctype_isElips (last))
2666 {
2667 voptgenerror
2668 (FLG_TYPE,
2669 message ("Function %s called with %d args, expects at least %d",
2670 exprNode_unparse (f),
2671 nargs, expectargs - 1),
2672 f->loc);
2673 }
2674 else
2675 {
2676 if (isIter)
2677 {
2678 voptgenerror
2679 (FLG_TYPE,
2680 message ("Iter %q invoked with %d args, expects %d",
2681 uentry_getName (fcn), nargs, expectargs),
2682 f->loc);
2683 }
2684 else
2685 {
2686 voptgenerror
2687 (FLG_TYPE,
2688 message ("Function %s called with %d args, expects %d",
2689 exprNode_unparse (f),
2690 nargs, expectargs),
2691 f->loc);
2692 }
2693 }
2694 }
2695 }
2696 }
2697
2698 return special;
2699}
2700
2701/*
2702** Check for undefined code sequences in function arguments:
2703**
2704** one parameter sets something used by another parameter
2705** one parameter sets something set by another parameter
2706*/
2707
2708static void
2709checkSequencingOne (exprNode f, exprNodeList args,
2710 /*@notnull@*/ exprNode el, int argno)
2711{
2712 /*
2713 ** Do second loop, iff +undefunspec
2714 */
2715
2716 int checkloop;
2717 int numloops = context_maybeSet (FLG_EVALORDERUNCON) ? 2 : 1;
2718
2719 for (checkloop = 0; checkloop < numloops; checkloop++)
2720 {
2721 sRefSet thissets;
2722
2723 if (checkloop == 0)
2724 {
2725 thissets = el->sets;
2726 }
2727 else
2728 {
2729 llassert (checkloop == 1);
2730 thissets = el->msets;
2731 }
2732
2733 sRefSet_realElements (thissets, thisset)
2734 {
2735 int j;
2736
2737 /*@access exprNodeList@*/
2738 for (j = 0; j < args->nelements; j++)
2739 {
2740 exprNode jl = args->elements[j];
2741 int thisargno = j + 1;
2742
2743 if (thisargno != argno && exprNode_isDefined (jl))
2744 {
2745 sRefSet otheruses = jl->uses;
2746
28bf4b0b 2747 if (sRef_isFileOrGlobalScope (sRef_getRootBase (jl->sref)) &&
616915dd 2748 sRefSet_hasUnconstrained (thissets))
2749 {
2750 voptgenerror
2751 (FLG_EVALORDERUNCON,
2752 /*@-sefparams@*/
2753 message
2754 ("%q used in argument %d may set "
2755 "global variable %q used by argument %d: %s(%q)",
2756 cstring_capitalizeFree (sRefSet_unparseUnconstrained (thissets)),
2757 /*@=sefparams@*/
2758 argno,
2759 sRef_unparse (sRef_getRootBase (jl->sref)),
2760 thisargno,
2761 exprNode_unparse (f), exprNodeList_unparse (args)),
2762 el->loc);
2763 }
2764
2765 if (sRefSet_member (otheruses, thisset))
2766 {
2767 if (sRef_isUnconstrained (thisset))
2768 {
2769 voptgenerror
2770 (FLG_EVALORDERUNCON,
2771 message
2772 ("Unconstrained functions used in arguments %d (%q) "
2773 "and %d (%s) may modify "
2774 "or use global state in undefined way: %s(%q)",
2775 argno,
2776 sRefSet_unparseUnconstrainedPlain (otheruses),
2777 thisargno,
2778 sRef_unconstrainedName (thisset),
2779 exprNode_unparse (f),
2780 exprNodeList_unparse (args)),
2781 el->loc);
2782 }
2783 else
2784 {
2785 voptgenerror
2786 (FLG_EVALORDER,
2787 message
2788 ("Argument %d modifies %q, used by argument %d "
2789 "(order of evaluation of actual parameters is "
2790 "undefined): %s(%q)",
2791 argno, sRef_unparse (thisset), thisargno,
2792 exprNode_unparse (f), exprNodeList_unparse (args)),
2793 el->loc);
2794 }
2795 }
2796 else
2797 {
2798 sRefSet othersets = jl->sets;
2799
2800 if (sRefSet_member (othersets, thisset))
2801 {
2802 if (sRef_isUnconstrained (thisset))
2803 {
2804 voptgenerror
2805 (FLG_EVALORDERUNCON,
2806 message
2807 ("Unconstrained functions used in "
2808 "arguments %d (%q) and %d (%s) may modify "
2809 "or use global state in undefined way: %s(%q)",
2810 argno,
2811 sRefSet_unparseUnconstrainedPlain (othersets),
2812 thisargno,
2813 sRef_unconstrainedName (thisset),
2814 exprNode_unparse (f), exprNodeList_unparse (args)),
2815 el->loc);
2816 }
2817 else
2818 {
2819 voptgenerror
2820 (FLG_EVALORDER,
2821 message
2822 ("Argument %d modifies %q, set by argument %d (order of"
2823 " evaluation of actual parameters is undefined): %s(%q)",
2824 argno, sRef_unparse (thisset), thisargno,
2825 exprNode_unparse (f), exprNodeList_unparse (args)),
2826 el->loc);
2827 }
2828 }
2829 }
2830 }
2831 }
2832 /*@noaccess exprNodeList@*/
2833 } end_sRefSet_realElements;
2834 }
2835}
2836
2837static void
2838checkSequencing (exprNode f, exprNodeList args)
2839{
2840 if (exprNodeList_size (args) > 1)
2841 {
2842 int i;
2843 exprNode el;
2844
2845 /*@access exprNodeList*/
2846
2847 for (i = 0; i < args->nelements; i++)
2848 {
2849 el = args->elements[i];
2850
2851 if (!exprNode_isError (el))
2852 {
2853 checkSequencingOne (f, args, el, i + 1);
2854 }
2855 }
2856 /*@noaccess exprNodeList*/
2857 }
2858}
2859
2860/*
2861** requires le = exprNode_getUentry (f)
2862*/
2863
2864static void
2865checkGlobMods (/*@notnull@*/ /*@dependent@*/ exprNode f,
2866 uentry le, exprNodeList args,
2867 /*@notnull@*/ exprNode ret, int specialArgs)
2868{
2869 bool isSpec = FALSE;
2870 bool hasMods = FALSE;
2871 cstring fname;
2872 globSet usesGlobs = globSet_undefined;
2873 sRefSet mods = sRefSet_undefined;
2874 bool freshMods = FALSE;
2875 uentryList params = uentryList_undefined;
2876
28bf4b0b 2877 DPRINTF (("Check glob mods: %s", exprNode_unparse (ret)));
2878
616915dd 2879 /*
2880 ** check globals and modifies
2881 */
2882
2883 setCodePoint ();
2884
2885 if (!uentry_isValid (le))
2886 {
2887 ctype fr = ctype_realType (f->typ);
2888
2889 if (ctype_isFunction (fr))
2890 {
2891 params = ctype_argsFunction (fr);
2892 }
2893 else
2894 {
2895 params = uentryList_missingParams;
2896 }
2897
2898 if (!context_getFlag (FLG_MODNOMODS)
2899 && !context_getFlag (FLG_GLOBUNSPEC))
2900 {
28bf4b0b 2901 checkUnspecCall (f, params, args);
616915dd 2902 }
2903
2904 return;
2905 }
2906
2907 fname = uentry_rawName (le);
2908
2909 setCodePoint ();
2910
2911 if (uentry_isFunction (le))
2912 {
2913 params = uentry_getParams (le);
2914 mods = uentry_getMods (le);
2915 hasMods = uentry_hasMods (le);
2916 usesGlobs = uentry_getGlobs (le);
2917 isSpec = uentry_isSpecified (le);
2918 }
2919 else /* not a function */
2920 {
2921 ctype ct = ctype_realType (uentry_getType (le));
2922
2923 llassertprint (uentry_isVar (le) && ctype_isFunction (ct),
2924 ("checkModGlobs: uentry not a function: %s",
2925 uentry_unparse (le)));
2926
2927 params = ctype_argsFunction (ct);
28bf4b0b 2928 return; /*@32 ! remove this? */
616915dd 2929 }
2930
2931 /*
2932 ** check globals
2933 */
2934
2935 setCodePoint ();
616915dd 2936
2937 globSet_allElements (usesGlobs, el)
2938 {
2939 if (sRef_isValid (el))
2940 {
2941 if (sRef_isInternalState (el) || sRef_isSystemState (el))
2942 {
2943 context_usedGlobal (el);
2944 exprNode_checkUse (f, el, f->loc);
2945
2946 if (context_checkInternalUse ())
2947 {
2948 if (!context_globAccess (el))
2949 {
2950 if (sRef_isSystemState (el)
2951 && !context_getFlag (FLG_MODFILESYSTEM))
2952 {
2953 ;
2954 }
2955 else
2956 {
2957 voptgenerror
2958 (FLG_INTERNALGLOBS,
2959 message
2960 ("Called procedure %s may access %q, but "
2961 "globals list does not include globals %s",
2962 exprNode_unparse (f),
2963 sRef_unparse (el),
2964 cstring_makeLiteralTemp (sRef_isInternalState (el)
2965 ? "internalState"
2966 : "fileSystem")),
2967 f->loc);
2968 }
2969 }
2970 }
2971 }
2972 else if (sRef_isNothing (el) || sRef_isSpecState (el))
2973 {
2974 ;
2975 }
2976 else
2977 {
2978 uentry gle = sRef_getUentry (el);
2979 sRef sr = sRef_updateSref (el);
2980
2981 if (sRef_isUndefGlob (el))
2982 {
2983 sRef_setDefined (sr, f->loc);
2984 exprNode_checkSet (f, sr);
2985 }
2986 else
2987 {
2988 /*
2989 ** check definition
2990 */
2991
2992 if (sRef_isAllocated (el))
2993 {
2994 exprNode_checkSet (f, sr);
2995 }
2996 else
2997 {
2998 if (sRef_isStateUndefined (sr))
2999 {
3000 voptgenerror
3001 (FLG_GLOBSTATE,
3002 message
3003 ("%s %q used by function undefined before call: %s",
3004 sRef_getScopeName (sr),
3005 sRef_unparse (sr),
3006 exprNode_unparse (f)),
3007 f->loc);
3008 sRef_setDefined (sr, f->loc);
3009 }
3010 exprNode_checkUse (f, sr, f->loc);
3011 }
3012
3013 checkGlobUse (gle, TRUE, f);
3014 }
3015
3016 if (sRef_isKilledGlob (el))
3017 {
3018 sRef_kill (sr, f->loc);
3019 context_usedGlobal (sr);
3020 }
3021 }
3022 }
3023 } end_globSet_allElements;
3024
3025 /*
3026 ** check modifies
3027 */
3028
3029 if (context_hasMods () || context_getFlag (FLG_MODNOMODS))
3030 {
3031 sRefSet smods = sRefSet_undefined;
3032
3033 /*
3034 ** NEED to check for modifies anything
3035 */
3036
3037 /*
3038 ** check each sRef that called function modifies (ml), is
3039 ** modifiable by tl
3040 */
3041
3042 setCodePoint ();
3043
3044 sRefSet_allElements (mods, s) /* s is something which may be modified */
3045 {
28bf4b0b 3046 DPRINTF (("Check modify: %s", sRef_unparse (s)));
3047
616915dd 3048 if (sRef_isKindSpecial (s))
3049 {
3050 if (sRef_isSpecInternalState (s))
3051 {
3052 if (context_getFlag (FLG_MODINTERNALSTRICT))
3053 {
3054 exprNode_checkCallModifyVal (s, args, f, ret);
3055 }
3056 else
3057 {
3058 sRefSet mmods = context_modList ();
3059
3060 sRefSet_allElements (mmods, el)
3061 {
3062 if (sRef_isInternalState (el))
3063 {
3064 sRef_setModified (el);
3065 }
3066 } end_sRefSet_allElements ;
3067 }
3068 }
3069 else
3070 {
3071 exprNode_checkCallModifyVal (s, args, f, ret);
3072 }
3073 }
3074 else
3075 {
3076 sRef rb = sRef_getRootBase (s);
3077
28bf4b0b 3078 if (sRef_isFileOrGlobalScope (rb))
616915dd 3079 {
3080 context_usedGlobal (rb);
3081 }
3082
3083 if (sRef_isFileStatic (s)
3084 && !fileId_equal (fileloc_fileId (f->loc),
3085 fileloc_fileId (uentry_whereDefined (le))))
3086 {
3087 smods = sRefSet_insert (smods, s);
3088 }
3089 else
3090 {
3091 exprNode_checkCallModifyVal (s, args, f, ret);
3092 }
3093 }
3094 } end_sRefSet_allElements;
3095
3096 setCodePoint ();
3097
3098 /*
3099 ** Static elements in modifies set can have nasty consequences.
3100 ** (I think...have not been able to reproduce a possible bug.)
3101 */
3102
3103 if (!sRefSet_isDefined (smods))
3104 {
3105 mods = sRefSet_newCopy (mods);
3106 freshMods = TRUE;
3107
3108 sRefSet_allElements (smods, el)
3109 {
3110 bool res = sRefSet_delete (mods, el);
3111
3112 llassert (res);
3113 } end_sRefSet_allElements;
3114
3115 sRefSet_free (smods);
3116 /*@-branchstate@*/
3117 }
3118 /*@=branchstate@*/
3119 }
3120 else if (sRefSet_isDefined (mods))
3121 { /* just check observers */
3122 setCodePoint ();
3123
3124 sRefSet_allElements (mods, s) /* s is something which may be modified */
3125 {
3126 sRef rb = sRef_getRootBase (s);
3127
3128 setCodePoint ();
3129
3130 if (sRef_isParam (rb))
3131 {
3132 sRef b = sRef_fixBaseParam (s, args);
3133
3134 if (sRef_isObserver (b))
3135 {
51bc6ecc 3136 exprNode e = exprNodeList_nth (args, sRef_getParam (rb));
616915dd 3137
3138 if (optgenerror
3139 (FLG_MODOBSERVER,
3140 message ("Function call may modify observer%q: %s",
3141 sRef_unparsePreOpt (b), exprNode_unparse (e)),
3142 exprNode_loc (e)))
3143 {
3144 sRef_showExpInfo (b);
3145 }
3146 }
3147 }
3148 } end_sRefSet_allElements;
3149 }
3150 else
3151 {
3152 if (!hasMods) /* no specified modifications */
3153 {
3154 if (context_getFlag (FLG_MODOBSERVERUNCON))
3155 {
3156 exprNodeList_elements (args, e)
3157 {
3158 if (exprNode_isDefined (e))
3159 {
3160 sRef s = exprNode_getSref (e);
3161
3162 if (sRef_isObserver (s)
3163 && ctype_isMutable (sRef_getType (s)))
3164 {
3165 if (optgenerror
3166 (FLG_MODOBSERVERUNCON,
3167 message
3168 ("Call to unconstrained function %s may modify observer%q: %s",
3169 exprNode_unparse (f),
3170 sRef_unparsePreOpt (s), exprNode_unparse (e)),
3171 exprNode_loc (e)))
3172 {
3173 sRef_showExpInfo (s);
3174 }
3175 }
3176 }
3177 } end_exprNodeList_elements;
3178 }
3179 }
3180 }
3181
3182 checkAnyCall (f, fname, params, args, hasMods, mods, isSpec, specialArgs);
3183
3184 ret->uses = sRefSet_union (ret->uses, f->uses);
3185 ret->sets = sRefSet_union (ret->sets, f->sets);
3186 ret->msets = sRefSet_union (ret->msets, f->msets);
3187
3188 if (freshMods)
3189 {
3190 /*
1b8ae690 3191 ** Spurious errors reported, because splint can't tell
616915dd 3192 ** mods must be fresh if freshMods is true.
3193 */
3194
3195 /*@i@*/ sRefSet_free (mods);
3196 }
3197
3198 setCodePoint ();
3199}
3200
3201void checkGlobUse (uentry glob, bool isCall, /*@notnull@*/ exprNode e)
3202{
3203 if (uentry_isVar (glob))
3204 {
3205 if (context_inFunctionLike ())
3206 {
3207 sRef sr = uentry_getSref (glob);
3208
3209 context_usedGlobal (sr);
3210
3211 if (context_checkGlobUse (glob))
3212 {
3213 if (!context_globAccess (sr))
3214 {
3215 if (isCall)
3216 {
3217 voptgenerror
3218 (FLG_GLOBALS,
3219 message ("Called procedure %s may access %s %q",
3220 exprNode_unparse (e),
3221 sRef_unparseScope (sr),
3222 uentry_getName (glob)),
3223 e->loc);
3224 }
3225 else
3226 {
3227 voptgenerror
3228 (FLG_GLOBALS,
3229 message ("Undocumented use of %s %s",
3230 sRef_unparseScope (sr),
3231 exprNode_unparse (e)),
3232 e->loc);
3233 }
3234 }
3235 }
3236 }
3237 }
3238 else
3239 {
3240 llbug (message ("Global not variable: %q", uentry_unparse (glob)));
3241 }
3242}
3243
28bf4b0b 3244static void
ccf0a4a8 3245reflectEnsuresClause (exprNode ret, uentry le, exprNode f, exprNodeList args)
28bf4b0b 3246{
3247 DPRINTF (("Reflect ensures clause: %s(%s) / %s / %s",
3248 exprNode_unparse (f), exprNodeList_unparse (args),
3249 uentry_unparseFull (le),
3250 stateClauseList_unparse (uentry_getStateClauseList (le))));
3251
3252 if (uentry_isValid (le) && uentry_isFunction (le))
3253 {
3254 stateClauseList sclauses = uentry_getStateClauseList (le);
3255
3256 if (stateClauseList_isDefined (sclauses))
3257 {
3258 DPRINTF (("Reflect ensures: %s / %s / %s",
3259 uentry_unparse (le),
3260 exprNode_unparse (f), exprNodeList_unparse (args)));
3261
3262 stateClauseList_elements (sclauses, cl)
3263 {
3264 if (stateClause_hasEnsures (cl))
3265 {
3266 /* Same in usymtab.c:1904 */
3267 if (stateClause_setsMetaState (cl))
3268 {
3269 qual q = stateClause_getMetaQual (cl);
3270 annotationInfo ainfo = qual_getAnnotationInfo (q);
3271 metaStateInfo minfo = annotationInfo_getState (ainfo);
3272 cstring key = metaStateInfo_getName (minfo);
3273 int mvalue = annotationInfo_getValue (ainfo);
3274
3275 sRefSet osrs = sRefSet_undefined;
3276 sRefSet srs;
3277
3278 if (stateClause_isGlobal (cl))
3279 {
3280 srs = sRefSet_single (usymtab_lookupGlobalMarker ());
3281 osrs = srs;
3282 }
3283 else
3284 {
3285 srs = stateClause_getRefs (cl);
3286 }
3287
3288 DPRINTF (("Reflect ensures clause: %s", stateClause_unparse (cl)));
3289
3290
3291 DPRINTF (("Sets meta state! %s", stateClause_unparse (cl)));
3292
3293 sRefSet_elements (srs, sel)
3294 {
3295 sRef s;
3296
3297 if (sRef_isResult (sRef_getRootBase (sel)))
3298 {
ccf0a4a8 3299 s = exprNode_getSref (ret);
28bf4b0b 3300 }
3301 else
3302 {
3303 s = sRef_fixBaseParam (sel, args);
28bf4b0b 3304 }
ccf0a4a8 3305
3306 DPRINTF (("Reflecting state clause on: %s / %s",
3307 sRef_unparse (sel), sRef_unparse (s)));
3308
3309 sRef_setMetaStateValueComplete (s, key, mvalue, exprNode_loc (f));
28bf4b0b 3310 } end_sRefSet_elements;
3311
3312 sRefSet_free (osrs);
3313 }
3314 else
3315 {
3316 sRefSet srs = stateClause_getRefs (cl);
3317 sRefModVal modf = stateClause_getEnsuresFunction (cl);
3318 int eparam = stateClause_getStateParameter (cl);
abd7f895 3319
3320 llassert (modf != NULL);
3321
28bf4b0b 3322 DPRINTF (("Reflect after clause: %s / %s",
3323 stateClause_unparse (cl),
3324 sRefSet_unparse (srs)));
3325
3326 sRefSet_elements (srs, sel)
3327 {
3328 sRef s;
3329
3330 DPRINTF (("elements: %s", sRef_unparse (sel)));
3331 DPRINTF (("elements: %s", sRef_unparseFull (sel)));
3332
3333 if (sRef_isResult (sRef_getRootBase (sel)))
3334 {
ccf0a4a8 3335 DPRINTF (("Fix base: %s / %s",
3336 sRef_unparse (sel), sRef_unparse (exprNode_getSref (ret))));
3337 s = sRef_fixBase (sel, exprNode_getSref (ret));
3338 DPRINTF (("==> %s", sRef_unparseFull (s)));
28bf4b0b 3339 }
3340 else
3341 {
3342 s = sRef_fixBaseParam (sel, args);
28bf4b0b 3343 }
ccf0a4a8 3344
3345 DPRINTF (("elements: %s", sRef_unparse (s)));
3346 DPRINTF (("elements: %s", sRef_unparseFull (s)));
3347
3348 DPRINTF (("Reflecting state clause on: %s / %s",
1d239d69 3349 sRef_unparseFull (sel), sRef_unparseFull (s)));
ccf0a4a8 3350
1d239d69 3351 /* evans 2001-08-24 - added aliasSetCompleteParam */
3352 sRef_aliasSetCompleteParam (modf, s, eparam, exprNode_loc (f));
3353
3354 DPRINTF (("After reflecting state clause on: %s / %s",
3355 sRef_unparseFull (sel), sRef_unparseFull (s)));
28bf4b0b 3356 } end_sRefSet_elements;
3357 }
3358 }
ba45e1e4 3359 } end_stateClauseList_elements ;
3360 }
3361
3362 DPRINTF (("Here: %s / %s",
3363 uentry_unparseFull (le),
3364 bool_unparse (uentry_hasMetaStateEnsures (le))));
3365
3366 if (uentry_hasMetaStateEnsures (le))
3367 {
6970c11b 3368 fileloc loc = exprNode_loc (f);
3369
ccf0a4a8 3370 metaStateConstraintList mscl = uentry_getMetaStateEnsures (le);
3120b462 3371
ccf0a4a8 3372 metaStateConstraintList_elements (mscl, msc)
3120b462 3373 {
ccf0a4a8 3374 metaStateSpecifier msspec = metaStateConstraint_getSpecifier (msc);
3375 metaStateInfo msinfo = metaStateSpecifier_getMetaStateInfo (msspec);
3376 metaStateExpression msexpr = metaStateConstraint_getExpression (msc);
6970c11b 3377 cstring key = metaStateInfo_getName (msinfo);
ccf0a4a8 3378 sRef mlsr = metaStateSpecifier_getSref (msspec);
3379 sRef s;
3380 sRef lastref = sRef_undefined;
3381 stateValue sval = stateValue_undefined;
3382
3383 DPRINTF (("Meta state constraint for %s: %s", uentry_unparse (le),
3384 metaStateConstraint_unparse (msc)));
3385 DPRINTF (("Matches left: %s", sRef_unparseDebug (mlsr)));
3386
3387 if (sRef_isResult (sRef_getRootBase (mlsr)))
12f2ffe9 3388 {
ccf0a4a8 3389 s = exprNode_getSref (ret);
12f2ffe9 3390 }
3391 else
3392 {
ccf0a4a8 3393 s = sRef_fixBaseParam (mlsr, args);
12f2ffe9 3394 }
ccf0a4a8 3395
3396 DPRINTF (("Setting state: %s", sRef_unparseFull (s)));
3397
3398 while (metaStateExpression_isDefined (msexpr))
12f2ffe9 3399 {
ccf0a4a8 3400 metaStateSpecifier ms = metaStateExpression_getSpecifier (msexpr);
ccf0a4a8 3401 metaStateInfo msi = metaStateSpecifier_getMetaStateInfo (ms);
6970c11b 3402 sRef msr, fs;
3403
ccf0a4a8 3404 DPRINTF (("Check expression: %s", metaStateExpression_unparse (msexpr)));
3405
3406 if (metaStateExpression_isMerge (msexpr))
3407 {
3408 msexpr = metaStateExpression_getRest (msexpr);
3409 }
3410 else
3411 {
3412 msexpr = metaStateExpression_undefined;
3413 }
3414
3415 if (metaStateInfo_isDefined (msi))
3416 {
3417 /* Must match lhs state */
3418 llassert (metaStateInfo_equal (msinfo, msi));
3419 }
3420
6970c11b 3421 if (metaStateSpecifier_isElipsis (ms))
12f2ffe9 3422 {
6970c11b 3423 /*
3424 ** For elipsis, we need to merge all the relevant elipsis parameters
3425 **
3426 */
12f2ffe9 3427
6970c11b 3428 uentryList params = uentry_getParams (le);
3429 int paramno = uentryList_size (params) - 1;
3430
3431 if (!uentry_isElipsisMarker (uentryList_getN (params, paramno)))
12f2ffe9 3432 {
6970c11b 3433 voptgenerror
3434 (FLG_TYPE,
3435 message ("Ensures clauses uses ... for function without ... in parameter list: %q",
3436 uentry_getName (le)),
3437 uentry_whereLast (le));
3438 /*@innerbreak@*/ break;
3439 }
3440
3441 while (paramno < exprNodeList_size (args))
3442 {
3443 exprNode arg = exprNodeList_getN (args, paramno);
3444 fs = exprNode_getSref (arg);
3445 DPRINTF (("Merge arg: %s", exprNode_unparse (arg)));
3446
3447 /* cut and pasted... gack*/
3448 if (stateValue_isDefined (sval))
ccf0a4a8 3449 {
6970c11b 3450 /* Use combination table to merge old state value with new one: */
3451 stateValue tval = sRef_getMetaStateValue (fs, key);
ccf0a4a8 3452
6970c11b 3453 if (stateValue_isDefined (tval))
3454 {
3455 stateCombinationTable sctable = metaStateInfo_getMergeTable (msinfo);
3456 cstring msg = cstring_undefined;
3457 int nval = stateCombinationTable_lookup (sctable,
3458 stateValue_getValue (sval),
3459 stateValue_getValue (tval),
3460 &msg);
3461 DPRINTF (("Combining: %s + %s -> %d",
3462 stateValue_unparseValue (sval, msinfo),
3463 stateValue_unparseValue (tval, msinfo),
3464 nval));
3465
3466 if (nval == stateValue_error)
3467 {
6970c11b 3468 if (optgenerror
3469 (FLG_STATEMERGE,
3470 message
3471 ("Attributes merged in ensures clause in states that "
b7e84605 3472 "cannot be combined (%q is %q, %q is %q)%q",
6970c11b 3473 sRef_unparse (lastref),
3474 stateValue_unparseValue (sval, msinfo),
3475 sRef_unparse (fs),
3476 stateValue_unparseValue (tval, msinfo),
b7e84605 3477 cstring_isDefined (msg) ?
3478 message (": %s", msg) : cstring_undefined),
6970c11b 3479 exprNode_loc (f)))
3480 {
3481 sRef_showMetaStateInfo (fs, key);
3482 }
3483 }
3484
3485 stateValue_updateValueLoc (sval, nval, fileloc_undefined);
3486 loc = exprNode_loc (arg);
3487 }
3488 else
ccf0a4a8 3489 {
6970c11b 3490 DPRINTF (("No value for: %s:%s", sRef_unparse (fs), key));
3491 }
3492 }
3493 else
3494 {
3495 sval = sRef_getMetaStateValue (fs, key);
ccf0a4a8 3496 }
3497
6970c11b 3498 lastref = fs;
3499
3500 if (stateValue_isError (sval))
3501 {
3502 /*@innerbreak@*/ break; /* Don't merge any more values if here was an error */
3503 }
3504
3505
3506 paramno++;
ccf0a4a8 3507 }
3508 }
3509 else
3510 {
6970c11b 3511 msr = metaStateSpecifier_getSref (ms);
ccf0a4a8 3512
6970c11b 3513
3514 llassert (sRef_isParam (sRef_getRootBase (msr)));
3515 fs = sRef_fixBaseParam (msr, args);
3516
3517 if (stateValue_isDefined (sval))
3518 {
3519 /* Use combination table to merge old state value with new one: */
3520 stateValue tval = sRef_getMetaStateValue (fs, key);
3521
3522 if (stateValue_isDefined (tval))
3523 {
3524 stateCombinationTable sctable = metaStateInfo_getMergeTable (msinfo);
3525 cstring msg = cstring_undefined;
3526 int nval = stateCombinationTable_lookup (sctable,
3527 stateValue_getValue (sval),
3528 stateValue_getValue (tval),
3529 &msg);
3530 DPRINTF (("Combining: %s + %s -> %d",
3531 stateValue_unparseValue (sval, msinfo),
3532 stateValue_unparseValue (tval, msinfo),
3533 nval));
3534
3535 if (nval == stateValue_error)
3536 {
6970c11b 3537 if (optgenerror
3538 (FLG_STATEMERGE,
3539 message
3540 ("Attributes merged in ensures clause in states that "
b7e84605 3541 "cannot be combined (%q is %q, %q is %q)%q",
6970c11b 3542 sRef_unparse (lastref),
3543 stateValue_unparseValue (sval, msinfo),
3544 sRef_unparse (fs),
3545 stateValue_unparseValue (tval, msinfo),
b7e84605 3546 cstring_isDefined (msg)
3547 ? message (": %s", msg) : cstring_undefined),
6970c11b 3548 exprNode_loc (f)))
3549 {
3550 sRef_showMetaStateInfo (fs, key);
3551 }
3552 }
3553
3554 stateValue_updateValueLoc (sval, nval, fileloc_undefined);
3555 }
3556 else
3557 {
3558 DPRINTF (("No value for: %s:%s", sRef_unparse (fs), key));
3559 }
3560 }
3561 else
3562 {
3563 sval = sRef_getMetaStateValue (fs, key);
3564 }
3565
3566 lastref = fs;
3567
3568 if (stateValue_isError (sval))
3569 {
3570 /*@innerbreak@*/ break; /* Don't merge any more values if here was an error */
3571 }
12f2ffe9 3572 }
12f2ffe9 3573 }
6970c11b 3574
ccf0a4a8 3575 DPRINTF (("Setting: %s:%s <- %s", sRef_unparse (s), key, stateValue_unparse (sval)));
3576
3577 if (stateValue_isDefined (sval))
12f2ffe9 3578 {
6970c11b 3579 sRef_setMetaStateValueComplete (s, key, stateValue_getValue (sval), loc);
12f2ffe9 3580 }
ccf0a4a8 3581 else
12f2ffe9 3582 {
ccf0a4a8 3583 DPRINTF (("Undefined state: %s", cstring_toCharsSafe (sRef_unparse (s))));
12f2ffe9 3584 }
ccf0a4a8 3585 } end_metaStateConstraintList_elements ;
ba45e1e4 3586
ccf0a4a8 3587 metaStateConstraintList_free (mscl);
28bf4b0b 3588 }
3589 }
3590}
3591
3592static void
3593checkRequiresClause (uentry le, exprNode f, exprNodeList args)
3594{
3595 DPRINTF (("Check requires clause: %s(%s) / %s / %s",
3596 exprNode_unparse (f), exprNodeList_unparse (args),
3597 uentry_unparseFull (le),
3598 stateClauseList_unparse (uentry_getStateClauseList (le))));
3599
3600 if (uentry_isValid (le) && uentry_isFunction (le))
3601 {
3602 stateClauseList sclauses = uentry_getStateClauseList (le);
3603
3604 if (stateClauseList_isDefined (sclauses))
3605 {
3606 DPRINTF (("Check requires: %s / %s / %s",
3607 uentry_unparse (le),
3608 exprNode_unparse (f), exprNodeList_unparse (args)));
3609
3610 stateClauseList_elements (sclauses, cl)
3611 {
3612 DPRINTF (("Check clause: %s / %s",
3613 stateClause_unparse (cl),
3614 bool_unparse (stateClause_hasRequires (cl))));
3615
3616 if (stateClause_hasRequires (cl))
3617 {
3618 sRefSet osrs = sRefSet_undefined;
3619 sRefSet srs;
3620
3621 if (stateClause_isGlobal (cl))
3622 {
3623 srs = sRefSet_single (usymtab_lookupGlobalMarker ());
3624 osrs = srs;
3625 }
3626 else
3627 {
3628 srs = stateClause_getRefs (cl);
3629 }
3630
3631 DPRINTF (("Refs: %s", sRefSet_unparse (srs)));
3632
3633 if (stateClause_setsMetaState (cl))
3634 {
3635 qual q = stateClause_getMetaQual (cl);
3636 annotationInfo ainfo = qual_getAnnotationInfo (q);
3637 metaStateInfo minfo = annotationInfo_getState (ainfo);
3638 cstring key = metaStateInfo_getName (minfo);
3639 int mvalue = annotationInfo_getValue (ainfo);
3640
3641 DPRINTF (("Requires meta state! %s = %d", key, mvalue));
3642
3643 sRefSet_elements (srs, sel)
3644 {
3645 sRef s = sRef_fixBaseParam (sel, args);
3646
3647 if (sRef_isResult (sRef_getRootBase (sel)))
3648 {
ccf0a4a8 3649 BADBRANCH;
28bf4b0b 3650 }
3651 else
3652 {
3653 DPRINTF (("Checking state clause on: %s / %s / %s = %d",
3654 sRef_unparseFull (sel), sRef_unparseFull (s),
3655 key, mvalue));
3656
3657 if (!sRef_checkMetaStateValue (s, key, mvalue))
3658 {
3659 DPRINTF (("HERE: %s", sRef_unparse (s)));
3660 if (optgenerror
3661 (FLG_STATETRANSFER,
3662 message
990ec868 3663 ("Requires clause of called function %q not satisfied%q (state is %q): %q",
28bf4b0b 3664 uentry_getName (le),
3665 sRef_isGlobalMarker (s)
3666 ? message ("")
3667 : message (" by %q", sRef_unparse (s)),
3668 stateValue_unparseValue (sRef_getMetaStateValue (s, key),
3669 minfo),
3670 stateClause_unparse (cl)),
3671 exprNode_loc (f)))
3672 {
3673 sRef_showAliasInfo (s);
3674 }
3675 else
3676 {
3677 DPRINTF (("Error supressed!"));
3678 DPRINTF (("Loc: %s", fileloc_unparse (exprNode_loc (f))));
3679 DPRINTF (("Context supress: %s",
3680 bool_unparse (context_suppressFlagMsg (FLG_STATETRANSFER, exprNode_loc (f)))));
3681 }
3682 }
3683 }
3684 } end_sRefSet_elements;
3685 }
3686 else
3687 {
3688 sRefModVal modf = stateClause_getRequiresBodyFunction (cl);
3689 int eparam = stateClause_getStateParameter (cl);
3690
3691 DPRINTF (("Reflect after clause: %s / %s",
3692 stateClause_unparse (cl),
3693 sRefSet_unparse (srs)));
3694
abd7f895 3695 llassert (modf != NULL);
3696
28bf4b0b 3697 sRefSet_elements (srs, sel)
3698 {
3699 sRef s;
3700
3701 DPRINTF (("elements: %s", sRef_unparse (sel)));
3702 DPRINTF (("elements: %s", sRef_unparseFull (sel)));
3703
3704 s = sRef_fixBaseParam (sel, args);
3705
3706 DPRINTF (("elements: %s", sRef_unparse (s)));
3707 DPRINTF (("elements: %s", sRef_unparseFull (s)));
3708
3709 if (sRef_isResult (sRef_getRootBase (sel)))
3710 {
b73d1009 3711 ; /* what do we do about results? */
28bf4b0b 3712 }
3713 else
3714 {
3715 DPRINTF (("Reflecting state clause on: %s / %s",
3716 sRef_unparse (sel), sRef_unparse (s)));
3717
3718 modf (s, eparam, exprNode_loc (f));
3719 }
3720 } end_sRefSet_elements;
3721 }
3722
3723 sRefSet_free (osrs);
3724 }
3725 } end_stateClauseList_elements ;
3726 }
3727 }
3728}
3729
616915dd 3730static /*@only@*/ exprNode
3731functionCallSafe (/*@only@*/ /*@notnull@*/ exprNode f,
3732 ctype t, /*@keep@*/ exprNodeList args)
3733{
3734 /* requires f is a non-error exprNode, with type function */
3735 cstring fname = exprNode_unparse (f);
3736 uentry le = exprNode_getUentry (f);
3737 exprNode ret = exprNode_createPartialCopy (f);
3738 int special;
3739
3740 setCodePoint ();
28bf4b0b 3741
3742 DPRINTF (("Call: %s %s",exprNode_unparse (f), exprNodeList_unparse (args)));
3743
3744 ret->typ = ctype_getReturnType (t);
616915dd 3745 ret->kind = XPR_CALL;
3746
3747 ret->edata = exprData_makeCall (f, args);
3748
3749 /*
3750 ** Order of these steps is very important!
3751 **
3752 ** Must check for argument dependencies before messing up uses and sets.
3753 */
3754
3755 if (context_getFlag (FLG_EVALORDER))
3756 {
3757 exprNodeList_elements (args, current)
3758 {
3759 if (exprNode_isDefined (current))
3760 {
3761 exprNode_addUse (current, current->sref);
3762 }
3763 } end_exprNodeList_elements;
3764
3765 if (context_maybeSet (FLG_EVALORDER) || context_maybeSet (FLG_EVALORDERUNCON))
3766 {
3767 checkSequencing (f, args);
3768 }
3769
3770 exprNodeList_elements (args, current)
3771 {
3772 if (exprNode_isDefined (current) && sRef_isMeaningful (current->sref))
3773 {
3774 exprNode_addUse (ret, sRef_makeDerived (current->sref));
3775 }
3776 } end_exprNodeList_elements ;
3777 }
3778
3779 special = checkArgs (le, f, t, args, ret);
3780 checkGlobMods (f, le, args, ret, special);
28bf4b0b 3781 checkRequiresClause (le, f, args);
3782 setCodePoint ();
616915dd 3783
616915dd 3784 if (uentry_isValid (le)
3785 && (uentry_isFunction (le)
3786 || (uentry_isVariable (le)
3787 && ctype_isFunction (uentry_getType (le)))))
3788 {
3789 exitkind exk = uentry_getExitCode (le);
3790
3791 /* f->typ is already set to the return type */
3792
ccf0a4a8 3793 DPRINTF (("Function: %s", uentry_unparseFull (le)));
6fcd0b1e 3794 ret->sref = uentry_returnedRef (le, args, exprNode_loc (f));
28bf4b0b 3795 DPRINTF (("Returned: %s / %s",
3796 uentry_unparseFull (le),
3797 sRef_unparseFull (ret->sref)));
ccf0a4a8 3798
616915dd 3799 if (uentry_isFunction (le) && exprNodeList_size (args) >= 1)
3800 {
3801 qual nullPred = uentry_nullPred (le);
3802
3803 if (qual_isTrueNull (nullPred))
3804 {
3805 exprNode arg = exprNodeList_head (args);
3806
3807 if (exprNode_isDefined (arg))
3808 {
3809 ret->guards = guardSet_addFalseGuard (ret->guards, arg->sref);
3810 }
3811 }
3812 else if (qual_isFalseNull (nullPred))
3813 {
3814 exprNode arg = exprNodeList_head (args);
3815
3816 if (exprNode_isDefined (arg))
3817 {
3818 ret->guards = guardSet_addTrueGuard (ret->guards, arg->sref);
3819 }
3820 }
3821 else
3822 {
3823 llassert (qual_isUnknown (nullPred));
3824 }
3825 }
3826
3827 if (exitkind_isConditionalExit (exk))
3828 {
3829 /*
3830 ** True exit is:
3831 ** if (arg0) then { exit! } else { ; }
3832 ** False exit is:
3833 ** if (arg0) then { ; } else { exit! }
3834 */
3835
3836 exprNode firstArg;
3837
3838 llassert (!exprNodeList_isEmpty (args));
3839 firstArg = exprNodeList_head (args);
3840
3841 if (exprNode_isDefined (firstArg)
3842 && !guardSet_isEmpty (firstArg->guards))
3843 {
3844 usymtab_trueBranch (guardSet_undefined);
3845 usymtab_altBranch (guardSet_undefined);
3846
3847 if (exitkind_isTrueExit (exk))
3848 {
3849 usymtab_popBranches (firstArg,
3850 exprNode_makeMustExit (),
3851 exprNode_undefined,
3852 TRUE, TRUEEXITCLAUSE);
3853 }
3854 else
3855 {
3856 usymtab_popBranches (firstArg,
3857 exprNode_undefined,
3858 exprNode_makeMustExit (),
3859 TRUE, FALSEEXITCLAUSE);
3860 }
3861 }
3862
3863 ret->exitCode = XK_MAYEXIT;
3864 }
3865 else if (exitkind_mustExit (exk))
3866 {
3867 ret->exitCode = XK_MUSTEXIT;
3868 }
3869 else if (exitkind_couldExit (exk))
3870 {
3871 ret->exitCode = XK_MAYEXIT;
3872 }
3873 else
3874 {
3875 ;
3876 }
3877
3878 if (cstring_equalLit (fname, "exit"))
3879 {
3880 if (exprNodeList_size (args) == 1)
3881 {
3882 exprNode arg = exprNodeList_head (args);
3883
3884 if (exprNode_isDefined (arg) && exprNode_knownIntValue (arg))
3885 {
3886 long int val = multiVal_forceInt (exprNode_getValue (arg));
3887
3888 if (val != 0)
3889 {
3890 voptgenerror
3891 (FLG_EXITARG,
3892 message
3893 ("Argument to exit has implementation defined behavior: %s",
3894 exprNode_unparse (arg)),
3895 exprNode_loc (arg));
3896 }
3897 }
3898 }
3899 }
3900 }
3901 else
3902 {
02b84d4b 3903 ret->sref = sRef_undefined;
616915dd 3904 exprNode_checkSetAny (ret, uentry_rawName (le));
3905 }
3906
ccf0a4a8 3907 DPRINTF (("Before reflect: %s", sRef_unparseFull (ret->sref)));
3908 DPRINTF (("Reflect: %s", uentry_unparseFull (le)));
3909 reflectEnsuresClause (ret, le, f, args);
3910 setCodePoint ();
3911
6fcd0b1e 3912 DPRINTF (("Here: %s", sRef_unparseFull (ret->sref)));
616915dd 3913 return (ret);
3914}
3915
3916/*
3917** this is yucky! should keep the uentry as part of exprNode!
3918*/
3919
e83c79ec 3920uentry exprNode_getUentry (exprNode e)
616915dd 3921{
3922 if (exprNode_isError (e))
3923 {
3924 return uentry_undefined;
3925 }
3926 else
3927 {
3928 cstring s = exprNode_rootVarName (e);
3929 uentry ue = usymtab_lookupSafe (s);
3930
3931 return ue;
3932 }
3933}
3934
3e3ec469 3935/*
3936** Returns true iff e1 and e2 are both exactly the same storage
3937** (conservative).
3938*/
3939
3940static bool exprNode_sameStorage (exprNode e1, exprNode e2)
3941{
3942 sRef s1 = exprNode_getSref (e1);
3943 sRef s2 = exprNode_getSref (e2);
3944
3945 return (sRef_realSame (s1, s2));
3946}
3947
616915dd 3948exprNode
3949exprNode_makeInitBlock (lltok brace, /*@only@*/ exprNodeList inits)
3950{
3951 exprNode ret = exprNode_createPlain (ctype_unknown);
3952
3953 ret->kind = XPR_INITBLOCK;
3954 ret->edata = exprData_makeCall (exprNode_undefined, inits);
3955 ret->loc = fileloc_update (ret->loc, lltok_getLoc (brace));
3956
3957 return (ret);
3958}
3959
3960exprNode
3961exprNode_functionCall (/*@only@*/ exprNode f, /*@only@*/ exprNodeList args)
3962{
3963 ctype t;
3964
6483a926 3965# ifdef DEBUGSPLINT
3966 usymtab_checkAllValid ();
3967# endif
616915dd 3968
3969 if (exprNode_isUndefined (f))
3970 {
3971 exprNode_free (f);
3972 exprNodeList_free (args);
3973 return exprNode_undefined;
3974 }
3975
3976 t = exprNode_getType (f);
3977
3978 if (sRef_isLocalVar (f->sref))
3979 {
3980 exprNode_checkUse (f, f->sref, f->loc);
3981
3982 if (sRef_possiblyNull (f->sref))
3983 {
3984 if (!usymtab_isGuarded (f->sref))
3985 {
3986 if (optgenerror (FLG_NULLDEREF,
3987 message ("Function call using %s pointer %q",
3988 sRef_nullMessage (f->sref),
3989 sRef_unparse (f->sref)),
3990 f->loc))
3991 {
3992 sRef_showNullInfo (f->sref);
3993 sRef_setNullError (f->sref);
3994 }
3995 }
3996 }
3997 }
3998
3999 setCodePoint ();
4000
4001 if (ctype_isRealFunction (t))
4002 {
4003 exprNode ret = functionCallSafe (f, t, args);
4004 setCodePoint ();
4005 return ret;
4006 }
4007 else if (ctype_isUnknown (t))
4008 {
4009 exprNode ret = exprNode_createPartialCopy (f);
4010 cstring tstring;
4011
4012 setCodePoint ();
4013
4014 ret->typ = t;
4015 exprNodeList_elements (args, current)
4016 {
4017 if (exprNode_isDefined (current))
4018 {
4019 exprNode_checkUse (ret, current->sref, ret->loc);
4020
4021 /*
4022 ** also, anything derivable from current->sref may be used
4023 */
4024
4025 exprNode_addUse (ret, sRef_makeDerived (current->sref));
4026 exprNode_mergeUSs (ret, current);
4027 }
4028 } end_exprNodeList_elements;
4029
4030 ret->edata = exprData_makeCall (f, args);
4031 ret->kind = XPR_CALL;
4032
4033 tstring = cstring_copy (exprNode_unparse (f));
4034
4035 cstring_markOwned (tstring);
4036 exprNode_checkSetAny (ret, tstring);
4037
4038 return (ret);
4039 }
4040 else
4041 {
4042 voptgenerror (FLG_TYPE,
4043 message ("Call to non-function (type %t): %s", t,
4044 exprNode_unparse (f)),
4045 f->loc);
4046 exprNode_free (f);
4047 exprNodeList_free (args);
4048
4049 return (exprNode_makeError ());
4050 }
4051}
4052
28bf4b0b 4053static exprNode
4054exprNode_fieldAccessAux (/*@only@*/ exprNode s, /*@observer@*/ fileloc loc,
4055 /*@only@*/ cstring f)
616915dd 4056{
4057 exprNode ret = exprNode_createPartialCopy (s);
4058
4059 ret->kind = XPR_FACCESS;
4060
4061 if (exprNode_isError (s))
4062 {
4063 ret->edata = exprData_makeField (s, f);
4064 return ret;
4065 }
4066 else
4067 {
4068 ctype t = exprNode_getType (s);
4069 ctype tr = ctype_realType (t);
28bf4b0b 4070
616915dd 4071 checkMacroParen (s);
4072
4073 ret->edata = exprData_makeField (s, f);
28bf4b0b 4074
616915dd 4075 if (ctype_isStructorUnion (tr))
4076 {
4077 uentry tf = uentryList_lookupField (ctype_getFields (tr), f);
4078
4079 if (uentry_isUndefined (tf))
4080 {
4081 voptgenerror (FLG_TYPE,
4082 message ("Access non-existent field %s of %t: %s", f, t,
4083 exprNode_unparse (ret)),
28bf4b0b 4084 loc);
4085 /*! cstring_free (f); */ /* evans 2001-03-25 self-detect */
616915dd 4086 return (ret);
4087 }
4088 else
4089 {
4090 uentry_setUsed (tf, exprNode_loc (ret));
4091
4092 ret->typ = uentry_getType (tf);
4093 checkSafeUse (ret, s->sref);
4094
4095 ret->sref = sRef_makeField (s->sref, uentry_rawName (tf));
28bf4b0b 4096 /*!? exprNode_free (s); */ /* evans 2001-03-25 self-detect */
616915dd 4097 return (ret);
4098 }
4099 }
4100 else /* isStructorUnion */
4101 {
4102 if (ctype_isRealAbstract (tr))
4103 {
4104 voptgenerror
4105 (FLG_ABSTRACT,
4106 message ("Access field of abstract type (%t): %s.%s",
4107 t, exprNode_unparse (s), f),
28bf4b0b 4108 loc);
616915dd 4109 ret->typ = ctype_unknown;
4110 }
4111 else
4112 {
4113 if (ctype_isKnown (tr))
4114 {
4115 voptgenerror
4116 (FLG_TYPE,
4117 message
4118 ("Access field of non-struct or union (%t): %s.%s",
4119 t, exprNode_unparse (s), f),
28bf4b0b 4120 loc);
616915dd 4121
4122 ret->typ = ctype_unknown;
4123 }
4124 else
4125 {
4126 cstring sn = cstring_copy (f);
28bf4b0b 4127
616915dd 4128 checkSafeUse (ret, s->sref);
4129 cstring_markOwned (sn);
4130 ret->sref = sRef_makeField (s->sref, sn);
616915dd 4131 return (ret);
4132 }
4133 }
28bf4b0b 4134
616915dd 4135 return (ret);
4136 }
4137 }
4138 BADEXIT;
4139}
4140
28bf4b0b 4141exprNode
4142exprNode_fieldAccess (/*@only@*/ exprNode s, /*@only@*/ lltok dot,
4143 /*@only@*/ cstring f)
4144{
4145 exprNode res = exprNode_fieldAccessAux (s, lltok_getLoc (dot), f);
80489f0a 4146 lltok_free (dot);
28bf4b0b 4147 return res;
4148}
4149
616915dd 4150exprNode
4151exprNode_addParens (/*@only@*/ lltok lpar, /*@only@*/ exprNode e)
4152{
4153 exprNode ret = exprNode_createPartialCopy (e);
4154
4155 ret->loc = fileloc_update (ret->loc, lltok_getLoc (lpar));
4156 ret->kind = XPR_PARENS;
4157 ret->edata = exprData_makeUop (e, lpar);
4158
4159 if (!exprNode_isError (e))
4160 {
4161 ret->exitCode = e->exitCode;
4162 ret->canBreak = e->canBreak;
4163 ret->mustBreak = e->mustBreak;
4164 ret->isJumpPoint = e->isJumpPoint;
4165 ret->sref = e->sref;
4166 }
4167
4168 return ret;
4169}
4170
28bf4b0b 4171static exprNode
4172exprNode_arrowAccessAux (/*@only@*/ exprNode s, /*@observer@*/ fileloc loc,
4173 /*@only@*/ cstring f)
616915dd 4174{
4175 exprNode ret = exprNode_createPartialCopy (s);
4176
4177 ret->edata = exprData_makeField (s, f);
4178 ret->kind = XPR_ARROW;
28bf4b0b 4179
616915dd 4180 if (exprNode_isError (s))
4181 {
4182 return (ret);
4183 }
4184 else
4185 {
28bf4b0b 4186 ctype t = exprNode_getType (s);
4187 ctype tr = ctype_realType (t);
4188
4189 checkMacroParen (s);
4190
4191 (void) ctype_fixArrayPtr (tr); /* REWRITE THIS */
4192
4193 if (ctype_isRealPointer (tr))
4194 {
4195 ctype b = ctype_realType (ctype_baseArrayPtr (tr));
4196
4197 if (ctype_isStructorUnion (b))
4198 {
4199 uentry fentry = uentryList_lookupField (ctype_getFields (b), f);
4200
4201 if (sRef_isKnown (s->sref) && sRef_possiblyNull (s->sref))
4202 {
4203 if (!usymtab_isGuarded (s->sref) && !context_inProtectVars ())
4204 {
4205 if (optgenerror
4206 (FLG_NULLDEREF,
4207 message ("Arrow access from %s pointer%q: %s",
4208 sRef_nullMessage (s->sref),
4209 sRef_unparsePreOpt (s->sref),
4210 exprNode_unparse (ret)),
4211 loc))
4212 {
4213 sRef_showNullInfo (s->sref);
4214 sRef_setNullError (s->sref);
4215 }
4216 }
4217 }
4218
4219 if (uentry_isUndefined (fentry))
4220 {
4221 voptgenerror
4222 (FLG_TYPE,
4223 message ("Access non-existent field %s of %t: %s",
4224 f, t, exprNode_unparse (ret)),
4225 loc);
4226 ret->typ = ctype_unknown;
4227 return (ret);
4228 }
4229 else
4230 {
4231 /*
4232 ** was safeUse: shouldn't be safe!
4233 **
4234 ** to do rec->field
4235 ** rec must be defined,
4236 ** *rec must be allocated
4237 ** rec->field need only be defined it if is an rvalue
4238 */
4239
4240 uentry_setUsed (fentry, exprNode_loc (ret));
4241 ret->typ = uentry_getType (fentry);
4242
4243 exprNode_checkUse (ret, s->sref, s->loc);
4244
4245 /* exprNode_checkUse (ret, sRef_makePointer (s->sref), s->loc); */
4246 ret->sref = sRef_makeArrow (s->sref, uentry_rawName (fentry));
4247 return (ret);
4248 }
4249 }
4250 else /* Pointer to something that is not a struct or union*/
4251 {
4252 if (ctype_isRealAbstract (tr))
4253 {
4254 ctype xrt = ctype_forceRealType (tr);
4255
4256 voptgenerror
4257 (FLG_ABSTRACT,
4258 message ("Arrow access field of abstract type (%t): %s->%s",
4259 t, exprNode_unparse (s), f),
4260 loc);
4261
4262 /*
4263 ** Set the state correctly, as if the abstraction is broken.
4264 */
4265
4266 if (ctype_isRealPointer (xrt) &&
4267 (b = ctype_realType (ctype_baseArrayPtr (xrt)),
4268 ctype_isStructorUnion (b)))
4269 {
4270 uentry fentry = uentryList_lookupField (ctype_getFields (b), f);
4271 ret->typ = uentry_getType (fentry);
4272 ret->sref = sRef_makeArrow (s->sref, uentry_rawName (fentry));
4273 }
4274 else
4275 {
4276 ret->typ = ctype_unknown;
4277 ret->sref = sRef_undefined;
4278 }
4279 }
4280 else /* not a struct, union or abstract */
4281 {
4282 if (ctype_isUnknown (tr)) {
4283 cstring sn = cstring_copy (f);
4284
4285 DPRINTF (("Here: %s", exprNode_unparse (s)));
4286
4287 exprNode_checkUse (ret, s->sref, s->loc);
4288 exprNode_checkUse (ret, sRef_makePointer (s->sref), s->loc);
4289
4290 cstring_markOwned (sn);
4291 ret->sref = sRef_makeArrow (s->sref, sn);
4292
4293 ret->kind = XPR_ARROW;
4294 return (ret);
4295 } else {
4296 voptgenerror
4297 (FLG_TYPE,
4298 message ("Arrow access field of non-struct or union "
4299 "pointer (%t): %s->%s",
4300 t, exprNode_unparse (s), f),
4301 loc);
4302
4303 ret->typ = ctype_unknown;
4304 ret->sref = sRef_undefined;
4305 }
4306 }
4307 }
4308 }
4309 else /* its not a pointer */
4310 {
4311 if (!ctype_isUnknown (tr))
4312 {
4313 voptgenerror
4314 (FLG_TYPE,
4315 message ("Arrow access of non-pointer (%t): %s->%s",
4316 t, exprNode_unparse (s), f),
4317 loc);
4318
4319 ret->typ = ctype_unknown;
4320 ret->sref = sRef_undefined;
4321 }
4322 else
4323 {
4324 cstring sn = cstring_copy (f);
4325
4326 DPRINTF (("Here: %s", exprNode_unparse (s)));
4327
4328 exprNode_checkUse (ret, s->sref, s->loc);
4329 exprNode_checkUse (ret, sRef_makePointer (s->sref), s->loc);
4330
4331 cstring_markOwned (sn);
4332 ret->sref = sRef_makeArrow (s->sref, sn);
4333
4334 ret->kind = XPR_ARROW;
4335 return (ret);
4336 }
4337 }
4338
616915dd 4339 return (ret);
4340 }
4341 BADEXIT;
4342}
4343
28bf4b0b 4344exprNode
4345exprNode_arrowAccess (/*@only@*/ exprNode s,
4346 /*@only@*/ lltok arrow,
4347 /*@only@*/ cstring f)
4348{
4349 exprNode res = exprNode_arrowAccessAux (s, lltok_getLoc (arrow), f);
80489f0a 4350 lltok_free (arrow);
28bf4b0b 4351 return res;
4352}
4353
616915dd 4354/*
4355** only postOp's in C: i++ and i--
4356*/
4357
4358exprNode
4359exprNode_postOp (/*@only@*/ exprNode e, /*@only@*/ lltok op)
4360{
4361 /* check modification also */
4362 /* cstring opname = lltok_unparse (op);*/
4363 ctype t;
4364 exprNode ret = exprNode_createPartialCopy (e);
4365
4366 ret->loc = fileloc_update (ret->loc, lltok_getLoc (op));
4367 ret->kind = XPR_POSTOP;
4368 ret->edata = exprData_makeUop (e, op);
4369
4370 if (!exprNode_isDefined (e))
4371 {
4372 return ret;
4373 }
4374
4375 checkMacroParen (e);
4376
4377 exprNode_checkUse (ret, e->sref, e->loc);
4378 exprNode_checkSet (ret, e->sref);
4379
4380 t = exprNode_getType (e);
4381
4382 if (sRef_isUnsafe (e->sref))
4383 {
4384 voptgenerror (FLG_MACROPARAMS,
4385 message ("Operand of %s is macro parameter (non-functional): %s%s",
4386 lltok_unparse (op), exprNode_unparse (e), lltok_unparse (op)),
4387 e->loc);
4388 sRef_makeSafe (e->sref);
4389 sRef_makeSafe (ret->sref);
4390 }
4391
4392 if (ctype_isForceRealNumeric (&t) || ctype_isRealAP (t))
4393 {
4394 ret->typ = e->typ;
4395 }
4396 else
4397 {
4398 if (ctype_isRealAbstract (t))
4399 {
e5081f8c 4400 if (ctype_isRealNumAbstract (t)) {
4401 ; /* Allow operations on numabstract types */
4402 } else {
4403 voptgenerror
4404 (FLG_ABSTRACT,
4405 message ("Operand of %s is abstract type (%t): %s",
4406 lltok_unparse (op), t, exprNode_unparse (e)),
4407 e->loc);
4408 }
616915dd 4409 }
4410 else
4411 {
4412 voptgenerror
4413 (FLG_TYPE,
4414 message ("Operand of %s is non-numeric (%t): %s",
4415 lltok_unparse (op), t, exprNode_unparse (e)),
4416 e->loc);
4417 }
4418 ret->typ = ctype_unknown;
4419 }
4420
4421 /* if (ctype_isZero (t)) e->typ = ctype_int; */
4422
4423 exprNode_checkModify (e, ret);
4424
4425 /* added 7/11/2000 D.L */
84c9ffbf 4426
b7b694d6 4427 /* updateEnvironmentForPostOp (e); */
4428
4429 /* start modifications */
4430 /* added by Seejo on 4/16/2000 */
4431
4432 /* Arithmetic operations on pointers wil modify the size/len/null terminated
4433 status */
4434 if ((sRef_isPossiblyNullTerminated (e->sref)) || (sRef_isNullTerminated(e->sref))) {
4435
4436 ret->sref = sRef_copy (e->sref);
4437
4438 /* Operator : ++ */
4439 if (lltok_getTok (op) == INC_OP) {
4440 if (sRef_getSize(e->sref) > 0) {
4441
4442 sRef_setSize (ret->sref, sRef_getSize(e->sref) - 1);
4443
4444 if (sRef_getLen(e->sref) == 1) { /* i.e. the first character is \0 */
4445 /* Assumption: there is only 1 \0 in the buffer */
4446 /* This will not be correct if there are 2 \0's in the buffer */
4447 sRef_setNotNullTerminatedState(ret->sref);
4448 sRef_resetLen(ret->sref);
4449 } else {
4450 sRef_setNullTerminatedState(ret->sref);
4451 sRef_setLen (ret->sref, sRef_getLen(e->sref) - 1);
4452 }
4453 if (sRef_isNullTerminated (ret->sref))
4454 printf ("ret->sref is Null Terminated\n");
4455 else if (sRef_isPossiblyNullTerminated (ret->sref))
4456 printf ("ret->sref is Possibly Null Terminated\n");
4457 else if (sRef_isNotNullTerminated (ret->sref))
4458 printf ("ret->sref is Not Null Terminated\n");
b941db6b 4459 else
4460 {}
b7b694d6 4461 }
4462 }
4463
4464 /* Operator : -- */
4465 if (lltok_getTok (op) == DEC_OP) {
4466 if (sRef_getSize(e->sref) >= 0) {
4467 sRef_setSize (ret->sref, sRef_getSize(e->sref) + 1);
4468 sRef_setLen (ret->sref, sRef_getLen(e->sref) + 1);
4469 }
4470 }
4471 }
b7b694d6 4472 /* end modifications */
616915dd 4473
4474 return ret;
4475}
4476
4477exprNode
4478exprNode_preOp (/*@only@*/ exprNode e, /*@only@*/ lltok op)
4479{
4480 bool checkMod = FALSE;
4481 ctype te, tr;
4482 int opid = lltok_getTok (op);
4483 exprNode ret = exprNode_createSemiCopy (e);
4484
4485 exprNode_copySets (ret, e);
4486
4487 multiVal_free (ret->val);
4488 ret->val = multiVal_undefined;
4489 ret->loc = fileloc_update (ret->loc, lltok_getLoc (op));
4490 ret->kind = XPR_PREOP;
4491 ret->edata = exprData_makeUop (e, op);
4492
4493 if (exprNode_isError (e))
4494 {
4495 return ret;
4496 }
4497
4498 checkMacroParen (e);
4499
4500 te = exprNode_getType (e);
4501 tr = ctype_realType (te);
4502
4503 if (opid != TAMPERSAND)
4504 {
4505 exprNode_checkUse (ret, e->sref, e->loc);
4506
4507 if (ctype_isRealAbstract (tr)
4508 && (!(ctype_isRealBool (te) && (opid == TEXCL))))
4509 {
e5081f8c 4510 if (ctype_isRealNumAbstract (tr))
616915dd 4511 {
e5081f8c 4512 ; /* no warning for numabstract types */
4513 }
4514 else
4515 {
4516 if (optgenerror (FLG_ABSTRACT,
4517 message ("Operand of %s is abstract type (%t): %s",
4518 lltok_unparse (op), tr,
4519 exprNode_unparse (ret)),
4520 e->loc))
4521 {
4522 tr = te = ctype_unknown;
4523 ret->typ = ctype_unknown;
4524 sRef_setNullError (e->sref);
4525 }
616915dd 4526 }
4527 }
4528 }
4529
4530 switch (opid)
4531 {
4532 case INC_OP:
4533 case DEC_OP: /* should also check modification! */
616915dd 4534 if (sRef_isMacroParamRef (e->sref))
4535 {
4536 voptgenerror
4537 (FLG_MACROPARAMS,
4538 message ("Operand of %s is macro parameter (non-functional): %s",
4539 lltok_unparse (op), exprNode_unparse (ret)),
4540 e->loc);
4541 }
4542 else
4543 {
4544 exprNode_checkSet (ret, e->sref);
4545 }
4546
4547 if (ctype_isForceRealNumeric (&tr) || ctype_isRealAP (tr))
4548 {
4549 }
4550 else
4551 {
4552 if (context_msgStrictOps ())
4553 {
4554 voptgenerror
4555 (FLG_STRICTOPS,
4556 message ("Operand of %s is non-numeric (%t): %s",
4557 lltok_unparse (op), te, exprNode_unparse (ret)),
4558 e->loc);
4559 }
4560 ret->typ = ctype_int;
4561 }
4562
4563 /* start modifications */
4564 /* added by Seejo on 4/16/2000 */
4565
4566 /* Arithmetic operations on pointers wil modify the size/len/null terminated
4567 status */
e5081f8c 4568 if ((sRef_isPossiblyNullTerminated (e->sref))
4569 || (sRef_isNullTerminated(e->sref))) {
616915dd 4570 ret->sref = sRef_copy (e->sref);
4571
4572 /* Operator : ++ */
4573 if (lltok_getTok (op) == INC_OP) {
4574 if (sRef_getSize(e->sref) > 0) {
4575
4576 sRef_setSize (ret->sref, sRef_getSize(e->sref) - 1);
4577
4578 if (sRef_getLen(e->sref) == 1) { /* i.e. the first character is \0 */
4579 /* Assumption: there is only 1 \0 in the buffer */
4580 /* This will not be correct if there are 2 \0's in the buffer */
4581 sRef_setNotNullTerminatedState(ret->sref);
4582 sRef_resetLen (ret->sref);
4583 } else {
4584 sRef_setNullTerminatedState(ret->sref);
4585 sRef_setLen (ret->sref, sRef_getLen(e->sref) - 1);
4586 }
4587 }
4588 }
4589
4590 /* Operator : -- */
4591 if (lltok_getTok (op) == DEC_OP) {
4592 if (sRef_getSize(e->sref) >= 0) {
4593 sRef_setSize (ret->sref, sRef_getSize(e->sref) + 1);
4594 sRef_setLen (ret->sref, sRef_getLen(e->sref) + 1);
4595 }
4596 }
4597 }
4598
4599 /* end modifications */
4600
4601 checkMod = TRUE;
4602 break;
4603
4604 case TMINUS:
4605 case TPLUS:
4606 if (ctype_isForceRealNumeric (&tr))
4607 {
4608 if (opid == TMINUS)
4609 {
4610 ret->val = multiVal_invert (exprNode_getValue (e));
4611 }
4612 else
4613 {
4614 ret->val = multiVal_copy (exprNode_getValue (e));
4615 }
4616 }
4617 else
4618 {
4619 if (context_msgStrictOps ())
4620 {
4621 voptgenerror
4622 (FLG_STRICTOPS,
4623 message ("Operand of %s is non-numeric (%t): %s",
4624 lltok_unparse (op), te, exprNode_unparse (ret)),
4625 e->loc);
4626 }
4627
4628 ret->typ = ctype_int;
4629 }
4630 break;
4631
4632 case TEXCL: /* maybe this should be restricted */
4633 guardSet_flip (ret->guards);
4634
28bf4b0b 4635 if (ctype_isRealBool (te) || ctype_isUnknown (te))
616915dd 4636 {
4637 ;
4638 }
4639 else
4640 {
4641 if (ctype_isRealPointer (tr))
4642 {
4643 if (sRef_isKnown (e->sref))
4644 {
4645 ret->guards = guardSet_addFalseGuard (ret->guards, e->sref);
4646 }
28bf4b0b 4647
616915dd 4648 voptgenerror2n
4649 (FLG_BOOLOPS, FLG_PTRNEGATE,
4650 message ("Operand of %s is non-boolean (%t): %s",
4651 lltok_unparse (op), te, exprNode_unparse (ret)),
4652 e->loc);
4653 }
4654 else
4655 {
4656 voptgenerror
4657 (FLG_BOOLOPS,
4658 message ("Operand of %s is non-boolean (%t): %s",
4659 lltok_unparse (op), te, exprNode_unparse (ret)),
4660 e->loc);
4661 }
4662
4663 ret->typ = ctype_bool;
4664 }
4665 break;
4666
4667 case TTILDE:
4668 if (ctype_isForceRealInt (&tr))
4669 {
4670 }
4671 else
4672 {
4673 if (context_msgStrictOps ())
4674 {
4675 voptgenerror
4676 (FLG_STRICTOPS,
4677 message ("Operand of %s is non-integer (%t): %s",
4678 lltok_unparse (op), te, exprNode_unparse (ret)),
4679 e->loc);
4680 }
4681
4682 if (ctype_isInt (e->typ))
4683 {
4684 ret->typ = e->typ;
4685 }
4686 else
4687 {
4688 ret->typ = ctype_int;
4689 }
4690 }
4691 break;
4692
4693 case TAMPERSAND:
4694 ret->typ = ctype_makePointer (e->typ);
4695
4696 if (sRef_isKnown (e->sref))
4697 {
4698 ret->sref = sRef_makeAddress (e->sref);
4699 }
4700
4701 break;
4702
4703 case TMULT:
4704
4705 if (ctype_isAP (tr))
4706 {
4707 ret->typ = ctype_baseArrayPtr (e->typ);
4708 }
4709 else
4710 {
4711 if (ctype_isKnown (te))
4712 {
4713 if (ctype_isFunction (te))
4714 {
4715 ret->typ = e->typ;
4716
4717 voptgenerror
4718 (FLG_FCNDEREF,
4719 message ("Dereference of function type (%t): %s",
4720 te, exprNode_unparse (ret)),
4721 e->loc);
4722 }
4723 else
4724 {
4725 voptgenerror (FLG_TYPE,
4726 message ("Dereference of non-pointer (%t): %s",
4727 te, exprNode_unparse (ret)),
4728 e->loc);
4729 ret->typ = ctype_unknown;
4730 }
4731 }
4732 else
4733 {
4734 ret->typ = ctype_unknown;
4735 }
4736
4737 }
4738
4739 if (sRef_isKnown (e->sref))
4740 {
2209bcb7 4741 DPRINTF (("Checking possibly null: %s", sRef_unparseFull (e->sref)));
4742
616915dd 4743 if (sRef_possiblyNull (e->sref))
4744 {
2209bcb7 4745 DPRINTF (("Checking possibly null: %s", sRef_unparse (e->sref)));
616915dd 4746 if (!usymtab_isGuarded (e->sref) && !context_inProtectVars ())
4747 {
4748 if (optgenerror
4749 (FLG_NULLDEREF,
4750 message ("Dereference of %s pointer %q: %s",
4751 sRef_nullMessage (e->sref),
4752 sRef_unparse (e->sref),
4753 exprNode_unparse (ret)),
4754 e->loc))
4755 {
4756 sRef_showNullInfo (e->sref);
4757 sRef_setNotNull (e->sref, e->loc); /* suppress future messages */
4758 }
4759 }
4760 }
4761
4762 ret->sref = sRef_makePointer (e->sref);
4763 }
4764 break;
4765
4766 default:
4767 llbug (message ("exprNode_preOp: unhandled op: %s", lltok_unparse (op)));
4768 }
4769
4770 if (checkMod)
4771 {
4772 exprNode_checkModify (e, ret);
4773 }
4774
4775 return ret;
4776}
4777
4778/*
4779** any reason to disallow sizeof (abstract type) ?
4780*/
4781
4782/*
4783** used by both sizeof
4784*/
4785
4786static
4787ctype sizeof_resultType (void)
4788{
4789 static ctype sizet = ctype_unknown;
4790
4791 if (ctype_isUnknown (sizet))
4792 {
4793 if (usymtab_existsType (cstring_makeLiteralTemp ("size_t")))
4794 {
4795 sizet = uentry_getAbstractType (usymtab_lookup (cstring_makeLiteralTemp ("size_t")));
4796 }
4797 else
4798 {
e0b363ad 4799 sizet = ctype_ulint;
616915dd 4800 }
4801 }
4802 return sizet;
4803}
4804
4805exprNode
4806exprNode_sizeofType (/*@only@*/ qtype qt)
4807{
4808 exprNode ret = exprNode_create (sizeof_resultType ());
4809 ctype ct = qtype_getType (qt);
4810
4811 ret->kind = XPR_SIZEOFT;
4812 ret->edata = exprData_makeSizeofType (qt);
4813
4814 voptgenerror (FLG_SIZEOFTYPE,
4815 message ("Parameter to sizeof is type %s: %s",
4816 ctype_unparse (ct),
4817 exprNode_unparse (ret)),
4818 ret->loc);
4819
4820 return (ret);
4821}
4822
4823exprNode
4824exprNode_alignofType (/*@only@*/ qtype qt)
4825{
4826 exprNode ret = exprNode_create (sizeof_resultType ());
4827 ctype ct = qtype_getType (qt);
4828
4829 ret->kind = XPR_ALIGNOFT;
4830 ret->edata = exprData_makeSizeofType (qt);
4831
4832 voptgenerror (FLG_SIZEOFTYPE,
4833 message ("Parameter to alignof is type %s: %s",
4834 ctype_unparse (ct),
4835 exprNode_unparse (ret)),
4836 ret->loc);
4837
4838 return (ret);
4839}
4840
4841exprNode exprNode_offsetof (qtype qt, cstringList s)
4842{
4843 exprNode ret = exprNode_create (sizeof_resultType ());
4844 ctype ct = qtype_getType (qt);
4845
4846 ret->kind = XPR_OFFSETOF;
4847 ret->edata = exprData_makeOffsetof (qt, s);
4848
4849 if (!ctype_isRealSU (ct))
4850 {
4851 voptgenerror (FLG_TYPE,
4852 message ("First parameter to offsetof is not a "
4853 "struct or union type (type %s): %s",
4854 ctype_unparse (ct),
4855 exprNode_unparse (ret)),
4856 ret->loc);
4857 }
4858 else
4859 {
4860 ctype lt = ct;
4861
4862 cstringList_elements (s, el) {
4863 uentryList fields;
4864 uentry fld;
4865
4866 if (ctype_isUndefined (lt))
4867 {
4868 break;
4869 }
4870 else if (!ctype_isRealSU (lt))
4871 {
4872 voptgenerror (FLG_TYPE,
4873 message ("Inner offsetof type is not a "
4874 "struct or union type (type %s before field %s): %s",
4875 ctype_unparse (lt), el,
4876 exprNode_unparse (ret)),
4877 ret->loc);
4878 break;
4879 }
4880 else
4881 {
4882 fields = ctype_getFields (ctype_realType (lt));
4883 fld = uentryList_lookupField (fields, el);
4884 DPRINTF (("Try: %s / %s", ctype_unparse (lt), el));
4885
4886 if (uentry_isUndefined (fld))
4887 {
4888 if (ctype_equal (lt, ct)) {
4889 voptgenerror (FLG_TYPE,
4890 message ("Field %s in offsetof is not the "
4891 "name of a field of %s: %s",
4892 el,
4893 ctype_unparse (ct),
4894 exprNode_unparse (ret)),
4895 ret->loc);
4896 } else {
4897 voptgenerror (FLG_TYPE,
4898 message ("Deep field %s in offsetof is not the "
4899 "name of a field of %s: %s",
4900 el,
4901 ctype_unparse (lt),
4902 exprNode_unparse (ret)),
4903 ret->loc);
4904 }
4905 }
4906 else
4907 {
4908 lt = uentry_getType (fld);
4909 }
4910 }
4911 } end_cstringList_elements;
4912
4913 /* Should report error if its a bit field - behavior is undefined! */
4914 }
4915
4916 return (ret);
4917}
4918
4919/*@only@*/ exprNode
4920exprNode_sizeofExpr (/*@only@*/ exprNode e)
4921{
4922 exprNode ret;
4923
4924 if (exprNode_isUndefined (e))
4925 {
4926 ret = exprNode_createLoc (ctype_unknown, fileloc_copy (g_currentloc));
4927 ret->edata = exprData_makeSingle (e);
4928 ret->typ = sizeof_resultType ();
4929 ret->kind = XPR_SIZEOF;
4930 }
4931 else
4932 {
4933 uentry u = exprNode_getUentry (e);
4934
4935 ret = exprNode_createPartialCopy (e);
4936 ret->edata = exprData_makeSingle (e);
4937
4938 ret->typ = sizeof_resultType ();
4939 ret->kind = XPR_SIZEOF;
4940
4941 if (uentry_isValid (u)
4942 && uentry_isRefParam (u)
4943 && ctype_isRealArray (uentry_getType (u)))
4944 {
4945 voptgenerror
4946 (FLG_SIZEOFFORMALARRAY,
4947 message ("Parameter to sizeof is an array-type function parameter: %s",
4948 exprNode_unparse (ret)),
4949 ret->loc);
4950 }
4951 }
4952
4953 /*
4954 ** sizeof (x) doesn't "really" use x
4955 */
4956
4957 return (ret);
4958}
4959
4960/*@only@*/ exprNode
4961exprNode_alignofExpr (/*@only@*/ exprNode e)
4962{
4963 exprNode ret;
4964
4965 if (exprNode_isUndefined (e))
4966 {
4967 ret = exprNode_createLoc (ctype_unknown, fileloc_copy (g_currentloc));
4968 }
4969 else
4970 {
4971 ret = exprNode_createPartialCopy (e);
4972 }
4973
4974 ret->edata = exprData_makeSingle (e);
4975 ret->typ = sizeof_resultType ();
4976 ret->kind = XPR_ALIGNOF;
4977
4978 /*
4979 ** sizeof (x) doesn't "really" use x
4980 */
4981
4982 return (ret);
4983}
4984
4985/*@only@*/ exprNode
4986exprNode_cast (/*@only@*/ lltok tok, /*@only@*/ exprNode e, /*@only@*/ qtype q)
4987{
4988 ctype c;
4989 ctype t;
4990 exprNode ret;
4991
4992 if (exprNode_isError (e))
4993 {
4994 qtype_free (q);
80489f0a 4995 lltok_free (tok);
616915dd 4996 return exprNode_undefined;
4997 }
4998
4999 checkMacroParen (e);
5000
5001 c = qtype_getType (q);
5002 t = exprNode_getType (e);
5003
5004 ret = exprNode_createPartialCopy (e);
5005
5006 ret->loc = fileloc_update (ret->loc, lltok_getLoc (tok));
5007 ret->typ = c;
5008 ret->kind = XPR_CAST;
5009 ret->edata = exprData_makeCast (tok, e, q);
5010
02b84d4b 5011 ret->sref = sRef_copy (e->sref);
5012
6fcd0b1e 5013 DPRINTF (("Cast 2: -> %s", sRef_unparseFull (ret->sref)));
5014
02b84d4b 5015 if (!sRef_isConst (e->sref))
616915dd 5016 {
616915dd 5017 usymtab_addForceMustAlias (ret->sref, e->sref);
616915dd 5018 }
02b84d4b 5019
6fcd0b1e 5020 DPRINTF (("Cast 2: -> %s", sRef_unparseFull (ret->sref)));
02b84d4b 5021 sRef_setTypeFull (ret->sref, c);
5022 DPRINTF (("Cast 2: -> %s", sRef_unparseFull (ret->sref)));
616915dd 5023
5024 /*
5025 ** we allow
5026 ** abstract -> void
5027 ** 0 <-> abstract *
5028 ** void * <-> abstract * (if FLG_ABSTVOIDP)
5029 ** abstract * <-> void * (if FLG_ABSTVOIDP)
5030 */
5031
5032 if (ctype_isVoid (c)) /* cast to void is always okay --- discard value */
5033 {
6fcd0b1e 5034 /* evans 2002-07-19: added this warning */
5035 DPRINTF (("Checking: %s / %s", exprNode_unparse (ret), sRef_unparseFull (ret->sref)));
5036 if (sRef_isFresh (ret->sref))
5037 {
5038 voptgenerror
5039 (FLG_MUSTFREEFRESH,
5040 message ("New fresh storage %q(type %s) cast to void (not released): %s",
5041 sRef_unparseOpt (ret->sref),
5042 ctype_unparse (exprNode_getType (ret)),
5043 exprNode_unparse (ret)),
5044 exprNode_loc (ret));
5045 }
616915dd 5046 }
5047 else if (ctype_isRealAP (c)) /* casting to array or pointer */
5048 {
5049 ctype bc = ctype_getBaseType (c);
5050 ctype bt = ctype_getBaseType (t);
5051 ctype rt = ctype_realType (t);
5052
5053 if (ctype_isFunction (ctype_baseArrayPtr (ctype_realType (c)))
5054 && (ctype_isArrayPtr (rt)
5055 && !ctype_isFunction (ctype_realType (ctype_baseArrayPtr (rt)))))
5056 {
5057 voptgenerror
5058 (FLG_CASTFCNPTR,
5059 message ("Cast from function pointer type (%t) to "
5060 "non-function pointer (%t): %s",
5061 c, t, exprNode_unparse (ret)),
5062 e->loc);
5063 }
5064
5065 if (!ctype_isFunction (ctype_baseArrayPtr (c))
5066 && (ctype_isArrayPtr (rt)
5067 && ctype_isFunction (ctype_realType (ctype_baseArrayPtr (rt)))))
5068 {
5069 voptgenerror
5070 (FLG_CASTFCNPTR,
5071 message ("Cast from non-function pointer type (%t) to "
5072 "function pointer (%t): %s",
5073 c, t, exprNode_unparse (ret)),
5074 e->loc);
5075 }
5076
5077 if (exprNode_isZero (e) && context_getFlag (FLG_ZEROPTR) &&
5078 !(ctype_isRealAbstract (bc)
5079 && context_hasAccess (ctype_typeId (bc))))
5080 {
5081 ; /* okay to cast zero */
5082 }
5083 else
5084 {
5085 if (ctype_isRealAbstract (bc)
5086 && !context_hasAccess (ctype_typeId (bc)))
5087 {
5088 if (ctype_isVoidPointer (t) || ctype_isUnknown (t))
5089 {
5090 vnoptgenerror
5091 (FLG_ABSTVOIDP,
5092 message ("Cast to underlying abstract type %t: %s",
5093 c, exprNode_unparse (ret)),
5094 e->loc);
5095 }
5096 else
5097 {
5098 voptgenerror
5099 (FLG_ABSTRACT,
5100 message ("Cast to underlying abstract type %t: %s",
5101 c, exprNode_unparse (ret)),
5102 e->loc);
5103 }
5104 }
5105
5106 if (ctype_isRealAbstract (bt)
5107 && !context_hasAccess (ctype_typeId (bt)))
5108 {
5109 if (ctype_isUnknown (c) || ctype_isVoidPointer (c))
5110 {
5111 vnoptgenerror
5112 (FLG_ABSTVOIDP,
5113 message ("Cast from underlying abstract type %t: %s",
5114 t, exprNode_unparse (ret)),
5115 e->loc);
5116 }
5117 else
5118 {
5119 voptgenerror
5120 (FLG_ABSTRACT,
5121 message ("Cast from underlying abstract type %t: %s",
5122 t, exprNode_unparse (ret)),
5123 e->loc);
5124 }
5125 }
5126 }
5127 }
5128 else
5129 {
5130 ctype bt = ctype_realType (ctype_getBaseType (t));
5131 ctype bc = ctype_realType (ctype_getBaseType (c));
5132
5133 if (ctype_isAbstract (bt) && !context_hasAccess (ctype_typeId (bt)))
5134 {
5135 if (ctype_match (c, t))
5136 {
5137 if (ctype_equal (c, t))
5138 {
5139 voptgenerror
5140 (FLG_TYPE,
5141 message ("Redundant cast involving abstract type %t: %s",
5142 bt, exprNode_unparse (ret)),
5143 e->loc);
5144 }
5145 }
5146 else
5147 {
5148 voptgenerror
5149 (FLG_ABSTRACT,
5150 message ("Cast from abstract type %t: %s",
5151 bt, exprNode_unparse (ret)),
5152 e->loc);
5153 }
5154 }
5155
5156 if (ctype_isAbstract (bc)
5157 && !context_hasAccess (ctype_typeId (bc)))
5158 {
5159 if (ctype_match (c, t))
5160 {
5161 ;
5162 }
5163 else
5164 {
e5081f8c 5165 if (ctype_isNumAbstract (bc))
5166 {
5167 if (exprNode_isNumLiteral (e))
5168 {
5169 voptgenerror
5170 (FLG_NUMABSTRACTCAST,
5171 message ("Cast from literal to numabstract type %t: %s", bc,
5172 exprNode_unparse (ret)),
5173 e->loc);
5174 }
5175 else
5176 {
5177 voptgenerror
5178 (FLG_NUMABSTRACT,
5179 message ("Cast to numabstract type %t: %s", bc,
5180 exprNode_unparse (ret)),
5181 e->loc);
5182 }
5183 }
5184 else
5185 {
5186 DPRINTF (("No access to: %s / %d",
5187 ctype_unparse (bc), ctype_typeId (bc)));
5188 DPRINTF (("Context %s %s",
5189 bool_unparse (context_inFunctionLike ()),
5190 context_unparse ()));
5191 voptgenerror
5192 (FLG_ABSTRACT,
5193 message ("Cast to abstract type %t: %s", bc,
5194 exprNode_unparse (ret)),
5195 e->loc);
5196 }
616915dd 5197 }
5198 }
5199 }
5200
5201 if (ctype_isAbstract (c))
5202 {
5203 if (sRef_isExposed (e->sref) || sRef_isOnly (e->sref))
5204 {
5205 /* okay, cast exposed to abstract */
5206 sRef_clearExKindComplete (ret->sref, fileloc_undefined);
5207 }
5208 else
5209 {
5210 if (ctype_isVisiblySharable (t)
5211 && sRef_isExternallyVisible (e->sref)
5212 && !(ctype_isAbstract (t)
5213 && context_hasAccess (ctype_typeId (t))))
5214 {
5215 voptgenerror
5216 (FLG_CASTEXPOSE,
5217 message ("Cast to abstract type from externally visible "
5218 "mutable storage exposes rep of %s: %s",
5219 ctype_unparse (c),
5220 exprNode_unparse (e)),
5221 e->loc);
5222 }
5223 }
5224 }
5225
5226 return (ret);
5227}
5228
5229static bool
5230evaluationOrderUndefined (lltok op)
5231{
5232 int opid = lltok_getTok (op);
5233
5234 return (opid != AND_OP && opid != OR_OP);
5235}
5236
5237static bool checkIntegral (/*@notnull@*/ exprNode e1,
5238 /*@notnull@*/ exprNode e2,
5239 /*@notnull@*/ exprNode ret,
5240 lltok op)
5241{
5242 bool error = FALSE;
5243
5244 ctype te1 = exprNode_getType (e1);
5245 ctype te2 = exprNode_getType (e2);
5246
5247 ctype tr1 = ctype_realishType (te1);
5248 ctype tr2 = ctype_realishType (te2);
5249
5250 if (ctype_isForceRealInt (&tr1) && ctype_isForceRealInt (&tr2))
5251 {
5252 ;
5253 }
5254 else
5255 {
5256 if (context_msgStrictOps ())
5257 {
5258 if (!ctype_isInt (tr1) && !ctype_isInt (tr2))
5259 {
5260 if (ctype_sameName (te1, te2))
5261 {
5262 error = optgenerror
5263 (FLG_STRICTOPS,
5264 message ("Operands of %s are non-integer (%t): %s",
5265 lltok_unparse (op), te1,
5266 exprNode_unparse (ret)),
5267 e1->loc);
5268 }
5269 else
5270 {
5271 error = optgenerror
5272 (FLG_STRICTOPS,
5273 message ("Operands of %s are non-integers (%t, %t): %s",
5274 lltok_unparse (op), te1, te2,
5275 exprNode_unparse (ret)),
5276 e1->loc);
5277 }
5278 }
5279 else if (!ctype_isInt (tr1))
5280 {
5281 error = optgenerror
5282 (FLG_STRICTOPS,
5283 message ("Left operand of %s is non-integer (%t): %s",
5284 lltok_unparse (op), te1, exprNode_unparse (ret)),
5285 e1->loc);
5286 }
5287 else
5288 /* !ctype_isInt (te2) */
5289 {
5290 error = optgenerror
5291 (FLG_STRICTOPS,
5292 message ("Right operand of %s is non-integer (%t): %s",
5293 lltok_unparse (op), te2, exprNode_unparse (ret)),
5294 e2->loc);
5295 }
5296 }
5297 }
5298
5299 return !error;
5300}
5301
5302/*
5303** returns exprNode representing e1 op e2
5304**
5305** uses msg if there are errors
5306** can be used for both assignment ops and regular ops
5307**
5308** modifies e1
5309*/
5310
5311static /*@only@*/ /*@notnull@*/ exprNode
5312exprNode_makeOp (/*@keep@*/ exprNode e1, /*@keep@*/ exprNode e2,
5313 /*@keep@*/ lltok op)
5314{
5315 ctype te1, te2, tr1, tr2, tret;
5316 int opid = lltok_getTok (op);
5317 bool hasError = FALSE;
5318 exprNode ret;
5319
5320 if (exprNode_isError (e1))
5321 {
5322 ret = exprNode_createPartialNVCopy (e2);
5323 }
5324 else
5325 {
5326 ret = exprNode_createPartialNVCopy (e1);
5327 }
5328
5329 ret->val = multiVal_undefined;
a956d444 5330
616915dd 5331 ret->kind = XPR_OP;
5332 ret->edata = exprData_makeOp (e1, e2, op);
5333
5334 if (exprNode_isError (e1) || exprNode_isError (e2))
5335 {
5336 if (opid == TLT || opid == TGT || opid == LE_OP || opid == GE_OP
5337 || opid == EQ_OP || opid == NE_OP
5338 || opid == AND_OP || opid == OR_OP)
5339 {
5340 ret->typ = ctype_bool;
5341 }
5342
5343 if (exprNode_isDefined (e1))
5344 {
5345 exprNode_checkUse (ret, e1->sref, e1->loc);
5346 }
5347
5348 if (exprNode_isDefined (e2))
5349 {
5350 exprNode_mergeUSs (ret, e2);
5351 exprNode_checkUse (ret, e2->sref, e2->loc);
5352 }
5353
5354 return ret;
5355 }
5356
5357 tret = ctype_unknown;
5358 te1 = exprNode_getType (e1);
8fe44445 5359
616915dd 5360 DPRINTF (("te1 = %s / %s", exprNode_unparse (e1), ctype_unparse (te1)));
5361
5362 te2 = exprNode_getType (e2);
5363
5364 tr1 = ctype_realishType (te1);
5365 tr2 = ctype_realishType (te2);
5366
5367 if (opid == OR_OP)
5368 {
5369 ret->guards = guardSet_or (ret->guards, e2->guards);
5370 }
5371 else if (opid == AND_OP)
5372 {
5373 ret->guards = guardSet_and (ret->guards, e2->guards);
5374 }
5375 else
5376 {
5377 /* no guards */
5378 }
5379
5380 if (opid == EQ_OP || opid == NE_OP)
5381 {
5382 exprNode temp1 = e1, temp2 = e2;
5383
5384 /* could do NULL == x */
5385
5386 if (exprNode_isNullValue (e1) || exprNode_isUnknownConstant (e1))
5387 {
5388 temp1 = e2; temp2 = e1;
5389 }
5390
5391 if (exprNode_isNullValue (temp2) || exprNode_isUnknownConstant (temp2))
5392 {
5393 reflectNullTest (temp1, (opid == NE_OP));
5394 guardSet_free (ret->guards);
5395 ret->guards = guardSet_copy (temp1->guards);
5396 }
5397 }
5398
5399 if (opid == TLT || opid == TGT || opid == LE_OP || opid == GE_OP
5400 || opid == EQ_OP || opid == NE_OP || opid == AND_OP || opid == OR_OP)
5401 {
5402 tret = ctype_bool;
5403 }
5404
5405 if (anyAbstract (tr1, tr2) &&
5406 (!((ctype_isRealBool (te1) || ctype_isRealBool (te2)) &&
5407 (opid == AND_OP || opid == OR_OP
5408 || opid == EQ_OP || opid == NE_OP))))
5409 {
e5081f8c 5410 if (abstractOpError (tr1, tr2, op, e1, e2, e1->loc, e2->loc))
5411 {
5412 tret = ctype_unknown;
5413 goto skiprest;
5414 }
616915dd 5415 }
e5081f8c 5416
5417 if (ctype_isUnknown (te1) || ctype_isUnknown (te2))
616915dd 5418 {
5419 /* unknown types, no comparisons possible */
e5081f8c 5420 goto skiprest;
616915dd 5421 }
e5081f8c 5422
5423 switch (opid)
616915dd 5424 {
e5081f8c 5425 case TMULT: /* multiplication and division: */
5426 case TDIV: /* */
5427 case MUL_ASSIGN: /* numeric, numeric -> numeric */
5428 case DIV_ASSIGN: /* */
5429 if (opid == TMULT || opid == MUL_ASSIGN)
616915dd 5430 {
e5081f8c 5431 ret->val = multiVal_multiply (exprNode_getValue (e1),
5432 exprNode_getValue (e2));
5433 }
5434 else
5435 {
5436 ret->val = multiVal_divide (exprNode_getValue (e1),
5437 exprNode_getValue (e2));
5438 }
5439
5440 tret = checkNumerics (tr1, tr2, te1, te2, e1, e2, op);
5441 break;
5442
5443 case TPLUS: /* addition and subtraction: */
5444 case TMINUS: /* pointer, int -> pointer */
5445 case SUB_ASSIGN: /* int, pointer -> pointer */
5446 case ADD_ASSIGN: /* numeric, numeric -> numeric */
5447 if (opid == TPLUS || opid == ADD_ASSIGN)
5448 {
5449 ret->val = multiVal_add (exprNode_getValue (e1),
5450 exprNode_getValue (e2));
5451 }
5452 else
5453 {
5454 ret->val = multiVal_subtract (exprNode_getValue (e1),
5455 exprNode_getValue (e2));
5456 }
5457
5458 tr1 = ctype_fixArrayPtr (tr1);
5459
5460 if ((ctype_isRealPointer (tr1) && !exprNode_isNullValue (e1))
5461 && (!ctype_isRealPointer (tr2) && ctype_isRealInt (tr2)))
5462 {
5463 /* pointer + int */
5464
5465 if (context_msgPointerArith ())
a956d444 5466 {
e5081f8c 5467 voptgenerror
5468 (FLG_POINTERARITH,
5469 message ("Pointer arithmetic (%t, %t): %s",
5470 te1, te2, exprNode_unparse (ret)),
5471 e1->loc);
a956d444 5472 }
616915dd 5473
e5081f8c 5474 /*
5475 ** Swap terms so e1 is always the pointer
5476 */
5477
5478 if (ctype_isRealPointer (tr1))
a956d444 5479 {
e5081f8c 5480 ;
a956d444 5481 }
5482 else
5483 {
e5081f8c 5484 exprNode_swap (e1, e2);
a956d444 5485 }
e5081f8c 5486
5487 if (sRef_possiblyNull (e1->sref)
5488 && !usymtab_isGuarded (e1->sref))
616915dd 5489 {
e5081f8c 5490 voptgenerror
5491 (FLG_NULLPOINTERARITH,
5492 message ("Pointer arithmetic involving possibly "
5493 "null pointer %s: %s",
5494 exprNode_unparse (e1),
5495 exprNode_unparse (ret)),
5496 e1->loc);
5497 }
5498
5499 ret->sref = sRef_copy (e1->sref);
5500
5501 /* start modifications */
5502 /* added by Seejo on 4/16/2000 */
5503
5504 /* Arithmetic operations on pointers wil modify the size/len/null terminated
5505 status */
5506 if ((sRef_isPossiblyNullTerminated (e1->sref)) || (sRef_isNullTerminated(e1->sref))) {
5507 int val;
5508 /*drl 1-4-2002
5509 added ugly fixed to stop
5510 program from crashing on point + int +int
5511 one day I'll fix this or ask Seejo wtf the codes supposed to do. */
5512
5513 if (!multiVal_isInt (e2->val) )
5514 break;
5515 /*end drl*/
5516
5517 val = (int) multiVal_forceInt (e2->val);
5518
5519 /* Operator : + or += */
5520 if ((lltok_getTok (op) == TPLUS) || (lltok_getTok(op) == ADD_ASSIGN)) {
5521 if (sRef_getSize(e1->sref) >= val) {/* Incrementing the pointer by
5522 val should not result in a
5523 size < 0 (size = 0 is ok !) */
ccf0a4a8 5524
e5081f8c 5525 sRef_setSize (ret->sref, sRef_getSize(e1->sref) - val);
ccf0a4a8 5526
e5081f8c 5527 if (sRef_getLen(e1->sref) == val) { /* i.e. the character at posn val is \0 */
5528 sRef_setNotNullTerminatedState(ret->sref);
5529 sRef_resetLen (ret->sref);
5530 } else {
5531 sRef_setNullTerminatedState(ret->sref);
5532 sRef_setLen (ret->sref, sRef_getLen(e1->sref) - val);
ccf0a4a8 5533 }
5534 }
616915dd 5535 }
e5081f8c 5536
5537 /* Operator : - or -= */
5538 if ((lltok_getTok (op) == TMINUS) || (lltok_getTok (op) == SUB_ASSIGN)) {
5539 if (sRef_getSize(e1->sref) >= 0) {
5540 sRef_setSize (ret->sref, sRef_getSize(e1->sref) + val);
5541 sRef_setLen (ret->sref, sRef_getLen(e1->sref) + val);
5542 }
5543 }
5544 }
5545
5546 /* end modifications */
5547
5548 sRef_setNullError (ret->sref);
5549
5550 /*
5551 ** Fixed for 2.2c: the alias state of ptr + int is dependent,
5552 ** since is points to storage that should not be deallocated
5553 ** through this pointer.
5554 */
5555
5556 if (sRef_isOnly (ret->sref)
5557 || sRef_isFresh (ret->sref))
616915dd 5558 {
e5081f8c 5559 sRef_setAliasKind (ret->sref, AK_DEPENDENT, exprNode_loc (ret));
5560 }
5561
5562 tret = e1->typ;
5563 }
5564 else if ((!ctype_isRealPointer(tr1) && ctype_isRealInt (tr1))
5565 && (ctype_isRealPointer (tr2) && !exprNode_isNullValue (e2)))
5566 {
5567 if (context_msgPointerArith ())
5568 {
5569 voptgenerror
5570 (FLG_POINTERARITH,
5571 message ("Pointer arithmetic (%t, %t): %s",
5572 te1, te2, exprNode_unparse (ret)),
5573 e1->loc);
5574 }
5575
5576 if (sRef_possiblyNull (e1->sref)
5577 && !usymtab_isGuarded (e1->sref))
5578 {
5579 voptgenerror
5580 (FLG_NULLPOINTERARITH,
5581 message ("Pointer arithmetic involving possibly "
5582 "null pointer %s: %s",
5583 exprNode_unparse (e2),
5584 exprNode_unparse (ret)),
5585 e2->loc);
5586 }
5587
5588 ret->sref = sRef_copy (e2->sref);
5589
5590 /* start modifications */
5591 /* added by Seejo on 4/16/2000 */
5592
5593 /* Arithmetic operations on pointers wil modify the size/len/null terminated
5594 status */
5595
5596 if ((sRef_isPossiblyNullTerminated (e2->sref)) || (sRef_isNullTerminated(e2->sref))) {
5597 int val = (int) multiVal_forceInt (e1->val);
5598
5599 /* Operator : + or += */
5600 if ((lltok_getTok (op) == TPLUS) || (lltok_getTok(op) == ADD_ASSIGN)) {
5601 if (sRef_getSize(e2->sref) >= val) {/* Incrementing the pointer by
5602 val should not result in a
5603 size < 0 (size = 0 is ok !) */
2209bcb7 5604
e5081f8c 5605 sRef_setSize (ret->sref, sRef_getSize(e2->sref) - val);
2209bcb7 5606
e5081f8c 5607 if (sRef_getLen(e2->sref) == val) { /* i.e. the character at posn val is \0 */
5608 sRef_setNotNullTerminatedState(ret->sref);
5609 sRef_resetLen (ret->sref);
5610 } else {
5611 sRef_setNullTerminatedState(ret->sref);
5612 sRef_setLen (ret->sref, sRef_getLen(e2->sref) - val);
b7b694d6 5613 }
616915dd 5614 }
616915dd 5615 }
e5081f8c 5616
5617 /* Operator : - or -= */
5618 if ((lltok_getTok (op) == TMINUS) || (lltok_getTok (op) == SUB_ASSIGN)) {
5619 if (sRef_getSize(e2->sref) >= 0) {
5620 sRef_setSize (ret->sref, sRef_getSize(e2->sref) + val);
5621 sRef_setLen (ret->sref, sRef_getLen(e2->sref) + val);
5622 }
616915dd 5623 }
e5081f8c 5624 }
5625 /* end modifications */
616915dd 5626
e5081f8c 5627 sRef_setNullError (ret->sref);
5628
5629 /*
5630 ** Fixed for 2.2c: the alias state of ptr + int is dependent,
5631 ** since is points to storage that should not be deallocated
5632 ** through this pointer.
5633 */
5634
5635 if (sRef_isOnly (ret->sref)
5636 || sRef_isFresh (ret->sref)) {
5637 sRef_setAliasKind (ret->sref, AK_DEPENDENT, exprNode_loc (ret));
5638 }
5639
5640 tret = e2->typ;
5641 ret->sref = e2->sref;
5642 }
5643 else
5644 {
5645 tret = checkNumerics (tr1, tr2, te1, te2, e1, e2, op);
5646 }
5647
5648 break;
5649
5650 case LEFT_ASSIGN:
5651 case RIGHT_ASSIGN:
5652 case LEFT_OP:
5653 case RIGHT_OP:
5654 case TAMPERSAND: /* bitwise & */
5655 case AND_ASSIGN:
5656 case TCIRC: /* ^ (XOR) */
5657 case TBAR:
5658 case XOR_ASSIGN:
5659 case OR_ASSIGN:
5660 {
5661 bool reported = FALSE;
5662
5663 /*
5664 ** Shift Operator
5665 */
5666
5667 if (opid == LEFT_OP || opid == LEFT_ASSIGN
5668 || opid == RIGHT_OP || opid == RIGHT_ASSIGN)
616915dd 5669 {
e5081f8c 5670 /*
5671 ** evans 2002-01-01: fixed this to follow ISO 6.5.7.
5672 */
5673
5674 if (!ctype_isUnsigned (tr2)
5675 && !exprNode_isNonNegative (e2))
5676 {
5677 reported = optgenerror
5678 (FLG_SHIFTNEGATIVE,
5679 message ("Right operand of %s may be negative (%t): %s",
5680 lltok_unparse (op), te2,
5681 exprNode_unparse (ret)),
5682 e2->loc);
5683 }
5684
5685 if (!ctype_isUnsigned (tr1)
5686 && !exprNode_isNonNegative (e1))
5687 {
5688 reported = optgenerror
5689 (FLG_SHIFTIMPLEMENTATION,
5690 message ("Left operand of %s may be negative (%t): %s",
5691 lltok_unparse (op), te1,
5692 exprNode_unparse (ret)),
5693 e1->loc);
5694 }
616915dd 5695
a956d444 5696 /*
e5081f8c 5697 ** Should check size of right operand also...
a956d444 5698 */
e5081f8c 5699
5700 }
5701 else
5702 {
5703 if (!ctype_isUnsigned (tr1))
616915dd 5704 {
e5081f8c 5705 if (exprNode_isNonNegative (e1)) {
5706 ;
5707 } else {
5708 reported = optgenerror
5709 (FLG_BITWISEOPS,
5710 message ("Left operand of %s is not unsigned value (%t): %s",
5711 lltok_unparse (op), te1,
5712 exprNode_unparse (ret)),
5713 e1->loc);
5714
5715 if (reported) {
5716 te1 = ctype_uint;
a956d444 5717 }
e5081f8c 5718 }
616915dd 5719 }
e5081f8c 5720 else
616915dd 5721 {
e5081f8c 5722 if (!ctype_isUnsigned (tr2))
616915dd 5723 {
e5081f8c 5724 if (!exprNode_isNonNegative (e2)) {
616915dd 5725 reported = optgenerror
a956d444 5726 (FLG_BITWISEOPS,
e5081f8c 5727 message ("Right operand of %s is not unsigned value (%t): %s",
5728 lltok_unparse (op), te2,
616915dd 5729 exprNode_unparse (ret)),
e5081f8c 5730 e2->loc);
5731 }
a956d444 5732 }
616915dd 5733 }
616915dd 5734 }
e5081f8c 5735
5736 if (!reported)
5737 {
5738 if (!checkIntegral (e1, e2, ret, op)) {
5739 te1 = ctype_unknown;
5740 }
616915dd 5741 }
e5081f8c 5742
5743 DPRINTF (("Set: %s", ctype_unparse (te1)));
5744
5745 /*
5746 ** tret is the widest type of te1 and te2
5747 */
5748
5749 tret = ctype_widest (te1, te2);
5750 break;
5751 }
5752 case MOD_ASSIGN:
5753 case TPERCENT:
5754 if (checkIntegral (e1, e2, ret, op)) {
5755 tret = te1;
5756 } else {
5757 tret = ctype_unknown;
5758 }
5759 break;
5760 case EQ_OP:
5761 case NE_OP:
5762 case TLT: /* comparisons */
5763 case TGT: /* numeric, numeric -> bool */
5764
5765 DPRINTF (("Here we go: %s / %s",
5766 ctype_unparse (tr1), ctype_unparse (tr2)));
5767
5768 if ((ctype_isReal (tr1) && !ctype_isInt (tr1))
5769 || (ctype_isReal (tr2) && !ctype_isInt (tr2)))
5770 {
5771 ctype rtype = tr1;
5772 bool fepsilon = FALSE;
5773
5774 if (!ctype_isReal (rtype) || ctype_isInt (rtype))
616915dd 5775 {
e5081f8c 5776 rtype = tr2;
5777 }
5778
5779 if (opid == TLT || opid == TGT)
5780 {
5781 uentry ue1 = exprNode_getUentry (e1);
5782 uentry ue2 = exprNode_getUentry (e2);
616915dd 5783
e5081f8c 5784 /*
5785 ** FLT_EPSILON, etc. really is a variable, not
5786 ** a constant.
5787 */
5788
5789 if (uentry_isVariable (ue1))
616915dd 5790 {
e5081f8c 5791 cstring uname = uentry_rawName (ue1);
5792
5793 if (cstring_equalLit (uname, "FLT_EPSILON")
5794 || cstring_equalLit (uname, "DBL_EPSILON")
5795 || cstring_equalLit (uname, "LDBL_EPSILON"))
616915dd 5796 {
e5081f8c 5797 fepsilon = TRUE;
616915dd 5798 }
5799 }
e5081f8c 5800
5801 if (uentry_isVariable (ue2))
616915dd 5802 {
e5081f8c 5803 cstring uname = uentry_rawName (ue2);
5804
5805 if (cstring_equalLit (uname, "FLT_EPSILON")
5806 || cstring_equalLit (uname, "DBL_EPSILON")
5807 || cstring_equalLit (uname, "LDBL_EPSILON"))
5808 {
5809 fepsilon = TRUE;
5810 }
616915dd 5811 }
5812 }
e5081f8c 5813
5814 if (fepsilon)
616915dd 5815 {
e5081f8c 5816 ; /* Don't complain. */
616915dd 5817 }
e5081f8c 5818 else
5819 {
5820 voptgenerror
5821 (FLG_REALCOMPARE,
5822 message ("Dangerous comparison involving %s types: %s",
5823 ctype_unparse (rtype),
5824 exprNode_unparse (ret)),
5825 ret->loc);
5826 }
5827 }
5828 /*@fallthrough@*/
5829 case LE_OP:
5830 case GE_OP:
5831
5832 /*
5833 ** Types should match.
5834 */
5835
5836 DPRINTF (("Match types: %s / %s", exprNode_unparse (e1),
5837 exprNode_unparse (e2)));
5838
5839 if (!exprNode_matchTypes (e1, e2))
5840 {
5841 hasError = gentypeerror
5842 (te1, e1, te2, e2,
5843 message ("Operands of %s have incompatible types (%t, %t): %s",
5844 lltok_unparse (op), te1, te2, exprNode_unparse (ret)),
5845 e1->loc);
5846
5847 }
5848
5849 if (hasError
5850 || (ctype_isForceRealNumeric (&tr1)
5851 && ctype_isForceRealNumeric (&tr2)) ||
5852 (ctype_isRealPointer (tr1) && ctype_isRealPointer (tr2)))
5853 {
5854 ; /* okay */
5855 }
5856 else
5857 {
5858 if ((ctype_isRealNumeric (tr1) && ctype_isRealPointer (tr2)) ||
5859 (ctype_isRealPointer (tr1) && ctype_isRealNumeric (tr2)))
616915dd 5860 {
e5081f8c 5861 voptgenerror
5862 (FLG_PTRNUMCOMPARE,
5863 message ("Comparison of pointer and numeric (%t, %t): %s",
5864 te1, te2, exprNode_unparse (ret)),
5865 e1->loc);
616915dd 5866 }
5867 else
5868 {
e5081f8c 5869 (void) checkNumerics (tr1, tr2, te1, te2, e1, e2, op);
616915dd 5870 }
e5081f8c 5871 tret = ctype_bool;
5872 }
5873
5874 /* certain comparisons on unsigned's and zero look suspicious */
5875
5876 if (opid == TLT || opid == LE_OP || opid == GE_OP)
5877 {
5878 if ((ctype_isUnsigned (tr1) && exprNode_isZero (e2))
5879 || (ctype_isUnsigned (tr2) && exprNode_isZero (e1)))
1d239d69 5880 {
e5081f8c 5881 voptgenerror
5882 (FLG_UNSIGNEDCOMPARE,
5883 message ("Comparison of unsigned value involving zero: %s",
5884 exprNode_unparse (ret)),
5885 e1->loc);
1d239d69 5886 }
e5081f8c 5887 }
5888
5889 /* EQ_OP should NOT be used with booleans (unless one is FALSE) */
5890
5891 if ((opid == EQ_OP || opid == NE_OP) &&
5892 ctype_isDirectBool (tr1) && ctype_isDirectBool (tr2))
5893 {
5894 /*
5895 ** is one a variable?
5896 */
616915dd 5897
e5081f8c 5898 if (uentry_isVariable (exprNode_getUentry (e1))
5899 || uentry_isVariable (exprNode_getUentry (e2)))
616915dd 5900 {
5901 /*
e5081f8c 5902 ** comparisons with FALSE are okay
616915dd 5903 */
e5081f8c 5904
5905 if (exprNode_isFalseConstant (e1)
5906 || exprNode_isFalseConstant (e2))
616915dd 5907 {
e5081f8c 5908 ;
5909 }
5910 else
5911 {
5912 voptgenerror
5913 (FLG_BOOLCOMPARE,
5914 message
5915 ("Use of %q with %s variables (risks inconsistency because "
5916 "of multiple true values): %s",
5917 cstring_makeLiteral ((opid == EQ_OP) ? "==" : "!="),
5918 context_printBoolName (), exprNode_unparse (ret)),
5919 e1->loc);
616915dd 5920 }
5921 }
e5081f8c 5922 }
5923 break;
5924
5925 case AND_OP: /* bool, bool -> bool */
5926 case OR_OP:
5927 if (ctype_isForceRealBool (&tr1) && ctype_isForceRealBool (&tr2))
5928 {
5929 ;
5930 }
5931 else
5932 {
5933 if (context_maybeSet (FLG_BOOLOPS))
616915dd 5934 {
e5081f8c 5935 if (!ctype_isRealBool (te1) && !ctype_isRealBool (te2))
616915dd 5936 {
e5081f8c 5937 if (ctype_sameName (te1, te2))
616915dd 5938 {
5939 voptgenerror
5940 (FLG_BOOLOPS,
e5081f8c 5941 message ("Operands of %s are non-boolean (%t): %s",
5942 lltok_unparse (op), te1,
5943 exprNode_unparse (ret)),
616915dd 5944 e1->loc);
5945 }
616915dd 5946 else
5947 {
e5081f8c 5948 voptgenerror
5949 (FLG_BOOLOPS,
5950 message
5951 ("Operands of %s are non-booleans (%t, %t): %s",
5952 lltok_unparse (op), te1, te2, exprNode_unparse (ret)),
5953 e1->loc);
616915dd 5954 }
5955 }
e5081f8c 5956 else if (!ctype_isRealBool (te1))
5957 {
5958 voptgenerror
5959 (FLG_BOOLOPS,
5960 message ("Left operand of %s is non-boolean (%t): %s",
5961 lltok_unparse (op), te1, exprNode_unparse (ret)),
5962 e1->loc);
5963 }
5964 else if (!ctype_isRealBool (te2))
5965 {
5966 voptgenerror
5967 (FLG_BOOLOPS,
5968 message ("Right operand of %s is non-boolean (%t): %s",
5969 lltok_unparse (op), te2, exprNode_unparse (ret)),
5970 e2->loc);
5971 }
5972 else
5973 {
5974 ;
5975 }
616915dd 5976 }
e5081f8c 5977 tret = ctype_bool;
616915dd 5978 }
e5081f8c 5979 break;
5980 default:
5981 llfatalbug
5982 (cstring_makeLiteral
5983 ("There has been a problem in the parser. This is believed to result "
5984 "from a problem with bison v. 1.25. Please try rebuidling Splint "
5985 "using the pre-compiled grammar files by commenting out the "
5986 "BISON= line in the top-level Makefile."));
616915dd 5987 }
5988
e5081f8c 5989skiprest:
616915dd 5990 ret->typ = tret;
e5081f8c 5991 DPRINTF (("Return type %s: %s", exprNode_unparse (ret), ctype_unparse (tret)));
616915dd 5992
5993 exprNode_checkUse (ret, e1->sref, e1->loc);
5994 exprNode_mergeUSs (ret, e2);
5995 exprNode_checkUse (ret, e2->sref, e2->loc);
5996
5997 return ret;
5998}
5999
6000/*@only@*/ exprNode
6001exprNode_op (/*@only@*/ exprNode e1, /*@keep@*/ exprNode e2,
6002 /*@only@*/ lltok op)
6003{
6004 exprNode ret;
6005
6006 checkMacroParen (e1);
6007 checkMacroParen (e2);
6008
6009 if (evaluationOrderUndefined (op) && context_maybeSet (FLG_EVALORDER))
6010 {
6011 checkExpressionDefined (e1, e2, op);
6012 }
6013
6014 ret = exprNode_makeOp (e1, e2, op);
6015 return (ret);
6016}
6017
6018static
6019void exprNode_checkAssignMod (exprNode e1, exprNode ret)
6020{
6021 /*
6022 ** This is somewhat bogus!
6023 **
6024 ** Assigning to a nested observer in a non-observer datatype
6025 ** should not produce an error.
6026 */
6027
6028 sRef ref = exprNode_getSref (e1);
6029
6030 DPRINTF (("Check assign mod: %s",
6031 sRef_unparseFull (ref)));
6032
6033 if (sRef_isObserver (ref)
28bf4b0b 6034 || ((sRef_isFileStatic (ref) || sRef_isFileOrGlobalScope (ref))
616915dd 6035 && ctype_isArray (ctype_realType (sRef_getType (ref)))))
6036 {
6037 sRef base = sRef_getBase (ref);
6038
6039 if (sRef_isValid (base) && sRef_isObserver (base))
6040 {
6041 exprNode_checkModify (e1, ret);
6042 }
6043 else
6044 {
6045 exprNode_checkModifyVal (e1, ret);
6046 }
6047 }
6048 else
6049 {
6050 exprNode_checkModify (e1, ret);
6051 }
6052}
6053
6054exprNode
abd7f895 6055exprNode_assign (/*@only@*/ exprNode e1, /*@only@*/ exprNode e2, /*@only@*/ lltok op)
616915dd 6056{
6057 bool isalloc = FALSE;
6058 bool isjustalloc = FALSE;
2209bcb7 6059 bool noalias = FALSE;
616915dd 6060 exprNode ret;
6061
6062 DPRINTF (("%s [%s] <- %s [%s]",
6063 exprNode_unparse (e1),
6064 ctype_unparse (e1->typ),
6065 exprNode_unparse (e2),
6066 ctype_unparse (e2->typ)));
6067
6068 if (lltok_getTok (op) != TASSIGN)
6069 {
6070 ret = exprNode_makeOp (e1, e2, op);
2209bcb7 6071
6072 DPRINTF (("Here goes: %s %s",
6073 ctype_unparse (e1->typ),
6074 ctype_unparse (e2->typ)));
6075
abd7f895 6076 if (exprNode_isDefined (e1)
6077 && exprNode_isDefined (e2))
2209bcb7 6078 {
abd7f895 6079 if (ctype_isNumeric (e2->typ)
6080 || ctype_isNumeric (e1->typ))
6081 {
6082 /* Its a pointer arithmetic expression like ptr += i */
6083 noalias = TRUE;
6084 }
6085 }
6086 }
616915dd 6087 else
6088 {
6089 ret = exprNode_createPartialCopy (e1);
6090 ret->kind = XPR_ASSIGN;
6091 ret->edata = exprData_makeOp (e1, e2, op);
6092
6093 if (!exprNode_isError (e2))
6094 {
6095 ret->sets = sRefSet_union (ret->sets, e2->sets);
6096 ret->msets = sRefSet_union (ret->msets, e2->msets);
6097 ret->uses = sRefSet_union (ret->uses, e2->uses);
6098 }
6099 }
6100
6101 checkExpressionDefined (e1, e2, op);
6102
6103 if (exprNode_isError (e1))
6104 {
6105 if (!exprNode_isError (e2))
6106 {
6107 ret->loc = fileloc_update (ret->loc, e2->loc);
6108 }
6109 else
6110 {
6111 ret->loc = fileloc_update (ret->loc, g_currentloc);
6112 }
6113 }
6114
6115 if (!exprNode_isError (e2))
6116 {
6117 checkMacroParen (e2);
6118 }
6119
6120 if (exprNode_isDefined (e1))
6121 {
6122 if (sRef_isMacroParamRef (e1->sref))
6123 {
6124 if (context_inIterDef ())
6125 {
6126 uentry ue = sRef_getUentry (e1->sref);
6127
6128 if (uentry_isYield (ue))
6129 {
6130 ;
6131 }
6132 else
6133 {
6134 if (fileloc_isDefined (e1->loc))
6135 {
6136 voptgenerror
6137 (FLG_MACROPARAMS,
6138 message ("Assignment to non-yield iter parameter: %q",
6139 sRef_unparse (e1->sref)),
6140 e1->loc);
6141 }
6142 else
6143 {
6144 voptgenerror
6145 (FLG_MACROPARAMS,
6146 message ("Assignment to non-yield iter parameter: %q",
6147 sRef_unparse (e1->sref)),
6148 g_currentloc);
6149 }
6150 }
6151 }
6152 else
6153 {
6154 if (fileloc_isDefined (e1->loc))
6155 {
6156 voptgenerror
6157 (FLG_MACROASSIGN,
6158 message ("Assignment to macro parameter: %q",
6159 sRef_unparse (e1->sref)),
6160 e1->loc);
6161 }
6162 else
6163 {
6164 voptgenerror
6165 (FLG_MACROASSIGN,
6166 message ("Assignment to macro parameter: %q",
6167 sRef_unparse (e1->sref)),
6168 g_currentloc);
6169 }
ccf0a4a8 6170
6171 exprNode_checkAssignMod (e1, ret); /* evans 2001-07-22 */
616915dd 6172 }
6173 }
6174 else
6175 {
6176 exprNode_checkAssignMod (e1, ret);
6177 }
6178
6179 if (exprNode_isDefined (e2))
6180 {
6181 if (lltok_getTok (op) == TASSIGN)
6182 {
6183 ctype te1 = exprNode_getType (e1);
6184 ctype te2 = exprNode_getType (e2);
6185
abd7f895 6186 if (ctype_isVoid (te2))
6187 {
6188 (void) gentypeerror
6189 (te2, e2, te1, e1,
6190 message ("Assignment of void value to %t: %s %s %s",
6191 te1, exprNode_unparse (e1),
6192 lltok_unparse (op),
6193 exprNode_unparse (e2)),
6194 e1->loc);
6195 }
6196 else if (!ctype_forceMatch (te1, te2))
616915dd 6197 {
6198 if (exprNode_matchLiteral (te1, e2))
6199 {
e5081f8c 6200 DPRINTF (("Literals match: %s / %s",
6201 ctype_unparse (te1), exprNode_unparse (e2)));
6202 if (ctype_isNumAbstract (te1)) {
6203 if (!context_flagOn (FLG_NUMABSTRACTLIT, e1->loc)) {
6204 (void) llgenhinterror
6205 (FLG_NUMABSTRACT,
6206 message
6207 ("Assignment of %t literal to numabstract type %t: %s %s %s",
6208 te2, te1,
6209 exprNode_unparse (e1),
6210 lltok_unparse (op),
6211 exprNode_unparse (e2)),
6212 cstring_makeLiteral
6213 ("Use +numabstractlit to allow numeric literals to be used as numabstract values"),
6214 e1->loc);
6215 }
6216 }
616915dd 6217 }
6218 else
6219 {
6220 (void) gentypeerror
6221 (te2, e2, te1, e1,
6222 message ("Assignment of %t to %t: %s %s %s",
6223 te2, te1, exprNode_unparse (e1),
6224 lltok_unparse (op),
6225 exprNode_unparse (e2)),
6226 e1->loc);
6227 }
6228 }
abd7f895 6229 else
6230 {
6231 /* Type checks okay */
6232 }
616915dd 6233 }
6234
6235 exprNode_mergeUSs (ret, e2);
6236 exprNode_checkUse (ret, e2->sref, e2->loc);
6237
2209bcb7 6238 DPRINTF (("Do assign! %s %s", exprNode_unparse (e1), exprNode_unparse (e2)));
6239 if (noalias)
6240 {
6241 ;
6242 }
6243 else
6244 {
6245 doAssign (e1, e2, FALSE);
6246 }
6247
616915dd 6248 ret->sref = e1->sref;
6249 }
6250 else
6251 {
6252 if (exprNode_isDefined (e2))
6253 {
6254 exprNode_mergeUSs (ret, e2);
2209bcb7 6255 exprNode_checkUse (ret, e2->sref, e2->loc);
616915dd 6256 }
6257 }
6258
6259 if (sRef_isPointer (e1->sref) && !sRef_isMacroParamRef (e1->sref))
6260 {
6261 exprNode_checkUse (ret, sRef_getBase (e1->sref), e1->loc);
6262 }
6263
6264 isjustalloc = sRef_isJustAllocated (e1->sref);
6265 isalloc = sRef_isAllocated (e1->sref);
6266
6267 if (sRef_isField (e1->sref))
6268 {
6269 sRef root = sRef_getRootBase (sRef_getBase (e1->sref));
6270
6271 if (!sRef_isAllocated (root) && !sRef_isMacroParamRef (root))
6272 {
6273 exprNode_checkUse (ret, root, e1->loc);
6274 }
6275
6276 }
6277
6278 /*
6279 ** be careful! this defines e1->sref.
6280 */
ccf0a4a8 6281
6282 /* evans 2001-07-22: removed if (!sRef_isMacroParamRef (e1->sref)) */
6283
1d239d69 6284 DPRINTF (("Setting: %s -> %s", exprNode_unparse (ret), sRef_unparse (e1->sref)));
ccf0a4a8 6285 exprNode_checkSet (ret, e1->sref);
616915dd 6286
6287 if (isjustalloc)
6288 {
6289 sRef_setAllocatedComplete (e1->sref, exprNode_isDefined (e2)
6290 ? e2->loc : e1->loc);
6291 }
6292 else
6293 {
6294 if (isalloc)
6295 {
6296 sRef_setAllocatedShallowComplete (e1->sref, exprNode_loc (e2));
6297 }
6298 }
6299 }
6300
6301 return ret;
6302}
6303
6304exprNode
6305exprNode_cond (/*@keep@*/ exprNode pred, /*@keep@*/ exprNode ifclause,
6306 /*@keep@*/ exprNode elseclause)
6307{
6308 exprNode ret;
6309
6310 if (!exprNode_isError (pred))
6311 {
6312 ret = exprNode_createPartialCopy (pred);
6313 checkMacroParen (pred);
6314 exprNode_checkPred (cstring_makeLiteralTemp ("conditional"), pred);
6315
6316 if (!exprNode_isError (ifclause))
6317 {
6318 checkMacroParen (ifclause); /* update macro counts! */
6319
6320 if (!exprNode_isError (elseclause))
6321 {
6322 checkMacroParen (elseclause);
6323
6324 if (!exprNode_matchTypes (ifclause, elseclause))
6325 {
6326 if (gentypeerror
6327 (exprNode_getType (ifclause),
6328 ifclause,
6329 exprNode_getType (elseclause),
6330 elseclause,
6331 message ("Conditional clauses are not of same type: "
6332 "%s (%t), %s (%t)",
6333 exprNode_unparse (ifclause),
6334 exprNode_getType (ifclause),
6335 exprNode_unparse (elseclause),
6336 exprNode_getType (elseclause)),
6337 ifclause->loc))
6338 {
6339 ret->sref = sRef_undefined;
6340 ret->typ = ctype_unknown;
6341 }
6342 }
6343 else
6344 {
6345 /* for now...should merge the states */
6346 ret->sref = ifclause->sref;
6347 ret->typ = ifclause->typ;
6348
6349 if (exprNode_isNullValue (ifclause))
6350 {
6351 ret->typ = elseclause->typ;
6352 }
6353 }
6354
6355 exprNode_checkUse (ret, pred->sref, pred->loc);
6356 exprNode_checkUse (ifclause, ifclause->sref, ifclause->loc);
6357 exprNode_checkUse (elseclause, elseclause->sref, elseclause->loc);
6358
6359 exprNode_mergeCondUSs (ret, ifclause, elseclause);
6360
6361 }
6362 else
6363 {
6364 ret->typ = ifclause->typ;
6365
6366 exprNode_checkUse (pred, pred->sref, pred->loc);
6367 exprNode_checkUse (ifclause, ifclause->sref, ifclause->loc);
6368
6369 exprNode_mergeCondUSs (ret, ifclause, exprNode_undefined);
6370 }
6371 }
6372 else
6373 {
6374 if (!exprNode_isError (elseclause))
6375 {
6376 ret->typ = elseclause->typ;
6377
6378 exprNode_checkUse (pred, pred->sref, pred->loc);
6379 exprNode_checkUse (elseclause, elseclause->sref, elseclause->loc);
6380
6381 exprNode_mergeCondUSs (ret, exprNode_undefined, elseclause);
6382 }
6383 }
6384 }
6385 else /* pred is error */
6386 {
6387 if (!exprNode_isError (ifclause))
6388 {
6389 ret = exprNode_createSemiCopy (ifclause);
6390
6391 checkMacroParen (ifclause); /* update macro counts! */
6392
6393 if (!exprNode_isError (elseclause))
6394 {
6395 checkMacroParen (elseclause);
6396
6397 ret->typ = ifclause->typ;
6398
6399 if (!ctype_forceMatch (ifclause->typ, elseclause->typ))
6400 {
6401 if (gentypeerror
6402 (exprNode_getType (ifclause),
6403 ifclause,
6404 exprNode_getType (elseclause),
6405 elseclause,
6406 message ("Conditional clauses are not of same type: "
6407 "%s (%t), %s (%t)",
6408 exprNode_unparse (ifclause),
6409 exprNode_getType (ifclause),
6410 exprNode_unparse (elseclause),
6411 exprNode_getType (elseclause)),
6412 ifclause->loc))
6413 {
6414 ret->typ = ctype_unknown;
6415 }
6416 }
6417
6418 exprNode_checkUse (ifclause, ifclause->sref, ifclause->loc);
6419 exprNode_checkUse (elseclause, elseclause->sref, elseclause->loc);
6420
6421 exprNode_mergeCondUSs (ret, ifclause, elseclause);
6422 }
6423 }
6424 else if (!exprNode_isError (elseclause)) /* pred, if errors */
6425 {
6426 ret = exprNode_createSemiCopy (ifclause);
6427
6428 ret->typ = elseclause->typ;
6429 checkMacroParen (elseclause);
6430
6431 exprNode_checkUse (elseclause, elseclause->sref, elseclause->loc);
6432 exprNode_mergeCondUSs (ret, exprNode_undefined, elseclause);
6433 }
6434 else /* all errors! */
6435 {
7ebcc5bb 6436 ret = exprNode_createLoc (ctype_unknown, fileloc_copy (g_currentloc));
616915dd 6437 }
6438 }
6439
6440 ret->kind = XPR_COND;
6441 ret->edata = exprData_makeCond (pred, ifclause, elseclause);
6442
6443 if (exprNode_isDefined (ifclause) && exprNode_isDefined (elseclause))
6444 {
6445 exprNode_combineControl (ret, ifclause, elseclause);
6446 }
6447
6448 return (ret);
6449}
6450
6451exprNode
6452exprNode_vaArg (/*@only@*/ lltok tok, /*@only@*/ exprNode arg, /*@only@*/ qtype qt)
6453{
6454 ctype totype = qtype_getType (qt);
6455 exprNode ret =
6456 exprNode_createPartialLocCopy (arg, fileloc_copy (lltok_getLoc (tok)));
6457 ctype targ;
6458
6459 /*
6460 ** check use of va_arg : <valist>, type -> type
6461 */
6462
6463 if (exprNode_isError (arg))
6464 {
6465 }
6466 else
6467 {
6468 targ = exprNode_getType (arg);
6469
6470 /*
6471 ** arg should have be a pointer
6472 */
6473
6474 if (!ctype_isUA (targ) ||
b73d1009 6475 (!typeId_equal (ctype_typeId (targ),
6476 usymtab_getTypeId (cstring_makeLiteralTemp ("va_list")))))
616915dd 6477 {
6478 voptgenerror
6479 (FLG_TYPE,
6480 message ("First argument to va_arg is not a va_list (type %t): %s",
6481 targ, exprNode_unparse (arg)),
6482 arg->loc);
6483 }
6484
6485 exprNode_checkSet (ret, arg->sref);
6486 }
6487
6488 /*
6489 ** return type is totype
6490 */
6491
6492 ret->typ = totype;
6493 ret->kind = XPR_VAARG;
6494 ret->edata = exprData_makeCast (tok, arg, qt);
6495
6496 return (ret);
6497}
6498
6499exprNode exprNode_labelMarker (/*@only@*/ cstring label)
6500{
6501 exprNode ret = exprNode_createPlain (ctype_undefined);
6502 ret->kind = XPR_LABEL;
6503 ret->edata = exprData_makeLiteral (label);
6504 ret->isJumpPoint = TRUE;
6505
6506 return (ret); /* for now, ignore label */
6507}
6508
6509exprNode exprNode_notReached (/*@returned@*/ exprNode stmt)
6510{
6511 if (exprNode_isDefined (stmt))
6512 {
6513 stmt->isJumpPoint = TRUE;
6514
6515 /* This prevent stray no return path errors, etc. */
6516 stmt->exitCode = XK_MUSTEXIT;
6517 }
6518
6519 return (stmt);
6520}
6521
6522bool exprNode_isDefaultMarker (exprNode e)
6523{
6524 if (exprNode_isDefined (e))
6525 {
6526 return (e->kind == XPR_DEFAULT || e->kind == XPR_FTDEFAULT);
6527 }
6528
6529 return FALSE;
6530}
6531
6532bool exprNode_isCaseMarker (exprNode e)
6533{
6534 if (exprNode_isDefined (e))
6535 {
6536 return (e->kind == XPR_FTCASE || e->kind == XPR_CASE);
6537 }
6538
6539 return FALSE;
6540}
6541
6542bool exprNode_isLabelMarker (exprNode e)
6543{
6544 if (exprNode_isDefined (e))
6545 {
6546 return (e->kind == XPR_LABEL);
6547 }
6548
6549 return FALSE;
6550}
6551
6552exprNode exprNode_caseMarker (/*@only@*/ exprNode test, bool fallThrough)
6553{
6554 exprNode ret = exprNode_createPartialCopy (test);
6555
6556 ret->kind = fallThrough ? XPR_FTCASE : XPR_CASE;
6557
6558 if (exprNode_isError (test)) {
6559 return ret;
6560 }
6561
6562 exprNode_checkUse (ret, test->sref, test->loc);
6563
6564 usymtab_setExitCode (ret->exitCode);
6565
6566 if (ret->mustBreak)
6567 {
6568 usymtab_setMustBreak ();
6569 }
6570
6571 ret->edata = exprData_makeSingle (test);
6572 ret->isJumpPoint = TRUE;
6573
6574 return ret;
6575}
6576
6577# if 0
6578exprNode exprNode_caseStatement (/*@only@*/ exprNode test, /*@only@*/ exprNode stmt, bool fallThrough)
6579{
6580 exprNode ret = exprNode_createPartialCopy (test);
6581
6582 ret->kind = fallThrough ? XPR_FTCASE : XPR_CASE;
6583 ret->edata = exprData_makePair (test, stmt);
6584 ret->isJumpPoint = TRUE;
6585
6586 if (exprNode_isError (test))
6587 {
6588 return ret;
6589 }
6590
6591 exprNode_checkUse (ret, test->sref, test->loc);
6592
6593 if (exprNode_isError (stmt))
6594 {
6595 return ret;
6596 }
6597
6598 exprNode_mergeUSs (ret, stmt);
6599
6600 ret->exitCode = stmt->exitCode;
6601 ret->mustBreak = stmt->mustBreak;
6602 ret->canBreak = stmt->canBreak;
6603
6604 usymtab_setExitCode (ret->exitCode);
6605
6606 if (ret->mustBreak)
6607 {
6608 usymtab_setMustBreak ();
6609 }
6610
6611 return ret;
6612}
6613# endif
6614
6615/*@notnull@*/ /*@only@*/ exprNode
6616exprNode_defaultMarker (/*@only@*/ lltok def, bool fallThrough)
6617{
6618 exprNode ret = exprNode_createTok (def);
6619
6620 ret->isJumpPoint = TRUE;
6621 ret->kind = fallThrough ? XPR_FTDEFAULT : XPR_DEFAULT;
6622 return (ret);
6623}
6624
6625bool
6626exprNode_mayEscape (exprNode e)
6627{
6628 if (exprNode_isDefined (e))
6629 {
6630 return exitkind_couldEscape (e->exitCode);
6631 }
6632 return FALSE;
6633}
6634
6635static bool
6636exprNode_mustBreak (exprNode e)
6637{
6638 if (exprNode_isDefined (e))
6639 {
6640 return e->mustBreak;
6641 }
8f8721fe 6642
616915dd 6643 return FALSE;
6644}
6645
6646bool
6647exprNode_mustEscape (exprNode e)
6648{
6649 if (exprNode_isDefined (e))
6650 {
6651 return exitkind_mustEscape (e->exitCode) || exprNode_mustBreak (e);
6652 }
6653
6654 return FALSE;
6655}
6656
6657bool
6658exprNode_errorEscape (exprNode e)
6659{
6660 if (exprNode_isDefined (e))
6661 {
6662 return exitkind_isError (e->exitCode);
6663 }
6664
6665 return FALSE;
6666}
6667
6668exprNode exprNode_concat (/*@only@*/ exprNode e1, /*@only@*/ exprNode e2)
6669{
6670 exprNode ret = exprNode_createPartialCopy (e1);
6671
28bf4b0b 6672 DPRINTF (("Concat: %s / %s", exprNode_unparse (e1), exprNode_unparse (e2)));
6673
616915dd 6674 ret->edata = exprData_makePair (e1, e2);
6675 ret->kind = XPR_STMTLIST;
6676
6677 if (exprNode_isDefined (e1))
6678 {
6679 ret->isJumpPoint = e1->isJumpPoint;
6680 ret->canBreak = e1->canBreak;
6681 }
6682 else
6683 {
6684 if (exprNode_isDefined (e2))
6685 {
6686 ret->loc = fileloc_update (ret->loc, e2->loc);
6687 }
6688 }
6689
6690 if (exprNode_isDefined (e2))
6691 {
6692 ret->exitCode = e2->exitCode;
6693 ret->mustBreak = e2->mustBreak;
6694 if (e2->canBreak) ret->canBreak = TRUE;
6695 }
6696
6697 /*
6698 ** if e1 must return, then e2 is unreachable!
6699 */
6700
6701 if (exprNode_isDefined (e1) && exprNode_isDefined (e2))
6702 {
6703 if ((exprNode_mustEscape (e1) || exprNode_mustBreak (e1))
6704 && !(e2->isJumpPoint))
6705 {
6706 if (context_getFlag (FLG_UNREACHABLE))
6707 {
6708 exprNode nr = e2;
6709
6710 if (e2->kind == XPR_STMT)
6711 {
6712 nr = exprData_getUopNode (e2->edata);
6713 }
6714
6715 if ((nr->kind == XPR_TOK
6716 && lltok_isSemi (exprData_getTok (nr->edata))))
6717 {
6718 /* okay to have unreachable ";" */
6719 ret->exitCode = XK_MUSTEXIT;
6720 ret->canBreak = TRUE;
6721 }
6722 else
6723 {
6724 if (optgenerror (FLG_UNREACHABLE,
6725 message ("Unreachable code: %s",
6726 exprNode_unparseFirst (nr)),
6727 exprNode_loc (nr)))
6728 {
6729 ret->isJumpPoint = TRUE;
6730 ret->mustBreak = FALSE;
6731 ret->exitCode = XK_ERROR;
6732 DPRINTF (("Jump point: %s", exprNode_unparse (ret)));
6733 }
6734 else
6735 {
6736 ret->exitCode = XK_MUSTEXIT;
6737 ret->canBreak = TRUE;
6738 }
6739
6740 }
6741 }
6742 }
6743 else
6744 {
6745 if ((e2->kind == XPR_CASE || e2->kind == XPR_DEFAULT))
6746 {
6747 /*
6748 ** We want a warning anytime we have:
6749 ** case xxx: ...
6750 ** yyy; <<<- no break or return
6751 ** case zzz: ...
6752 */
6753
6754 exprNode lastStmt = exprNode_lastStatement (e1);
6755
6756 if (exprNode_isDefined (lastStmt)
6757 && !exprNode_mustEscape (lastStmt)
6758 && !exprNode_mustBreak (lastStmt)
6759 && !exprNode_isCaseMarker (lastStmt)
6760 && !exprNode_isDefaultMarker (lastStmt)
6761 && !exprNode_isLabelMarker (lastStmt))
6762 {
6763 voptgenerror (FLG_CASEBREAK,
6764 cstring_makeLiteral
2209bcb7 6765 ("Fall through case (no preceding break)"),
616915dd 6766 e2->loc);
6767 }
6768 }
6769 }
6770 }
6771
6772 exprNode_mergeUSs (ret, e2);
28bf4b0b 6773
616915dd 6774 usymtab_setExitCode (ret->exitCode);
6775
6776 if (ret->mustBreak)
6777 {
6778 usymtab_setMustBreak ();
6779 }
6780
abd7f895 6781 DPRINTF (("==> %s", exprNode_unparse (ret)));
616915dd 6782 return ret;
6783}
6784
6785exprNode exprNode_createTok (/*@only@*/ lltok t)
6786{
b73d1009 6787 exprNode ret = exprNode_create (ctype_unknown);
616915dd 6788 ret->kind = XPR_TOK;
6789 ret->edata = exprData_makeTok (t);
6790 return ret;
6791}
6792
6793exprNode exprNode_statement (/*@only@*/ exprNode e, /*@only@*/ lltok t)
6794{
6795 if (!exprNode_isError (e))
6796 {
abd7f895 6797 exprChecks_checkStatementEffect(e);
616915dd 6798 }
6799
6800 return (exprNode_statementError (e, t));
6801}
6802
6803static exprNode exprNode_statementError (/*@only@*/ exprNode e, /*@only@*/ lltok t)
6804{
6805 exprNode ret = exprNode_createPartialCopy (e);
6806
6807 if (!exprNode_isError (e))
6808 {
6809 if (e->kind != XPR_ASSIGN)
6810 {
6811 exprNode_checkUse (ret, e->sref, e->loc);
6812 }
6813
6814 ret->exitCode = e->exitCode;
6815 ret->canBreak = e->canBreak;
6816 ret->mustBreak = e->mustBreak;
6817 }
6818
6819 ret->edata = exprData_makeUop (e, t);
6820 ret->kind = XPR_STMT;
6821
6822 return ret;
6823}
6824
6825exprNode exprNode_checkExpr (/*@returned@*/ exprNode e)
6826{
6827 if (!exprNode_isError (e))
6828 {
6829 if (e->kind != XPR_ASSIGN)
6830 {
6831 exprNode_checkUse (e, e->sref, e->loc);
6832 }
6833 }
6834
6835 return e;
6836}
6837
6838void exprNode_produceGuards (exprNode pred)
6839{
6840 if (!exprNode_isError (pred))
6841 {
6842 if (ctype_isRealPointer (pred->typ))
6843 {
6844 pred->guards = guardSet_addTrueGuard (pred->guards, pred->sref);
6845 }
6846
6847 exprNode_checkUse (pred, pred->sref, pred->loc);
6848 exprNode_resetSref (pred);
6849 }
6850}
6851
abd7f895 6852exprNode exprNode_compoundStatementExpression (/*@only@*/ lltok tlparen, /*@only@*/ exprNode e)
6853{
6854 exprNode laststmt;
6855
6856 DPRINTF (("Compound: %s", exprNode_unparse (e)));
6857
6858 if (!context_flagOn (FLG_GNUEXTENSIONS, exprNode_loc (e)))
6859 {
6860 (void) llgenhinterror
6861 (FLG_SYNTAX,
6862 message ("Compound statement expressions is not supported by ISO C99"),
6863 message ("Use +gnuextensions to allow compound statement expressions (and other GNU language extensions) "
6864 "without this warning"),
6865 exprNode_loc (e));
6866 }
6867
6868 /*
6869 ** The type of a compoundStatementExpression is the type of the last statement
6870 */
6871
6872 llassert (exprNode_isBlock (e));
6873 laststmt = exprNode_lastStatement (e);
6874
6875 DPRINTF (("Last statement: %s / %s", exprNode_unparse (laststmt), ctype_unparse (exprNode_getType (laststmt))));
6876 DPRINTF (("e: %s", exprNode_unparse (e)));
6877 e->typ = exprNode_getType (laststmt);
6878 return exprNode_addParens (tlparen, e);
6879}
6880
6881
616915dd 6882exprNode exprNode_makeBlock (/*@only@*/ exprNode e)
6883{
6884 exprNode ret = exprNode_createPartialCopy (e);
6885
6886 if (!exprNode_isError (e))
6887 {
6888 ret->exitCode = e->exitCode;
6889 ret->canBreak = e->canBreak;
6890 ret->mustBreak = e->mustBreak;
6891 }
6892
abd7f895 6893 DPRINTF (("Block e: %s", exprNode_unparse (e)));
616915dd 6894 ret->edata = exprData_makeSingle (e);
6895 ret->kind = XPR_BLOCK;
abd7f895 6896 DPRINTF (("Block: %s", exprNode_unparse (ret)));
616915dd 6897 return ret;
6898}
6899
6900bool exprNode_isBlock (exprNode e)
6901{
6902 return (exprNode_isDefined (e)
6903 && ((e)->kind == XPR_BLOCK));
6904}
abd7f895 6905
6906bool exprNode_isStatement (exprNode e)
6907{
6908 return (exprNode_isDefined (e)
6909 && ((e)->kind == XPR_STMT));
6910}
616915dd 6911
6912bool exprNode_isAssign (exprNode e)
6913{
6914 if (exprNode_isDefined (e))
6915 {
6916 return (e->kind == XPR_ASSIGN);
6917 }
6918
6919 return FALSE;
6920}
6921
6922bool exprNode_isEmptyStatement (exprNode e)
6923{
6924 return (exprNode_isDefined (e)
6925 && (e->kind == XPR_TOK)
6926 && (lltok_isSemi (exprData_getTok (e->edata))));
6927}
6928
abd7f895 6929bool exprNode_isMultiStatement (exprNode e)
6930{
6931 return (exprNode_isDefined (e)
6932 && ((e->kind == XPR_FOR)
6933 || (e->kind == XPR_FORPRED)
6934 || (e->kind == XPR_IF)
6935 || (e->kind == XPR_IFELSE)
6936 || (e->kind == XPR_WHILE)
6937 || (e->kind == XPR_WHILEPRED)
6938 || (e->kind == XPR_DOWHILE)
6939 || (e->kind == XPR_BLOCK)
6940 || (e->kind == XPR_STMT)
6941 || (e->kind == XPR_STMTLIST)
6942 || (e->kind == XPR_SWITCH)));
6943}
6944
2e127cb8 6945void exprNode_checkIfPred (exprNode pred)
6946{
6947 exprNode_checkPred (cstring_makeLiteralTemp ("if"), pred);
6948}
6949
616915dd 6950exprNode exprNode_if (/*@only@*/ exprNode pred, /*@only@*/ exprNode tclause)
6951{
6952 exprNode ret;
6953 bool emptyErr = FALSE;
6954
6955 if (context_maybeSet (FLG_IFEMPTY))
6956 {
6957 if (exprNode_isEmptyStatement (tclause))
6958 {
6959 emptyErr = optgenerror (FLG_IFEMPTY,
6960 cstring_makeLiteral
6961 ("Body of if statement is empty"),
6962 exprNode_loc (tclause));
6963 }
6964 }
6965
6966 if (!emptyErr && context_maybeSet (FLG_IFBLOCK))
6967 {
6968 if (exprNode_isDefined (tclause)
6969 && !exprNode_isBlock (tclause))
6970 {
6971 voptgenerror (FLG_IFBLOCK,
6972 message
6973 ("Body of if statement is not a block: %s",
6974 exprNode_unparse (tclause)),
6975 exprNode_loc (tclause));
6976 }
6977 }
6978
6979 if (exprNode_isError (pred))
6980 {
6981 if (exprNode_isError (tclause))
6982 {
7ebcc5bb 6983 ret = exprNode_createLoc (ctype_unknown, fileloc_copy (g_currentloc));
616915dd 6984 }
6985 else
6986 {
6987 ret = exprNode_createPartialCopy (tclause);
6988 }
6989 }
6990 else
6991 {
6992 if (exprNode_mustEscape (pred))
6993 {
6994 voptgenerror
6995 (FLG_UNREACHABLE,
6996 message ("Predicate always exits: %s", exprNode_unparse (pred)),
6997 exprNode_loc (pred));
6998 }
2e127cb8 6999
616915dd 7000 exprNode_checkUse (pred, pred->sref, pred->loc);
7001
7002 if (!exprNode_isError (tclause))
7003 {
7004 exprNode_mergeCondUSs (pred, tclause, exprNode_undefined);
7005 }
7006
7007 ret = exprNode_createPartialCopy (pred);
7008 }
7009
7010 ret->kind = XPR_IF;
7011 ret->edata = exprData_makePair (pred, tclause);
7012
7013 ret->exitCode = XK_UNKNOWN;
7014
7015 if (exprNode_isDefined (tclause))
7016 {
7017 ret->exitCode = exitkind_makeConditional (tclause->exitCode);
7018 ret->canBreak = tclause->canBreak;
7019 ret->sets = sRefSet_union (ret->sets, tclause->sets);
7020 ret->msets = sRefSet_union (ret->msets, tclause->msets);
7021 ret->uses = sRefSet_union (ret->uses, tclause->uses);
7022 }
7023
7024 ret->mustBreak = FALSE;
7025
7026 return ret;
7027}
7028
7029exprNode exprNode_ifelse (/*@only@*/ exprNode pred,
7030 /*@only@*/ exprNode tclause,
7031 /*@only@*/ exprNode eclause)
7032{
7033 exprNode ret;
7034 bool tEmptyErr = FALSE;
7035 bool eEmptyErr = FALSE;
7036
7037 if (context_maybeSet (FLG_IFEMPTY))
7038 {
7039 if (exprNode_isEmptyStatement (tclause))
7040 {
7041 tEmptyErr = optgenerror
7042 (FLG_IFEMPTY,
7043 cstring_makeLiteral
7044 ("Body of if clause of if statement is empty"),
7045 exprNode_loc (tclause));
7046 }
7047
7048 if (exprNode_isEmptyStatement (eclause))
7049 {
7050 eEmptyErr = optgenerror
7051 (FLG_IFEMPTY,
7052 cstring_makeLiteral
7053 ("Body of else clause of if statement is empty"),
7054 exprNode_loc (eclause));
7055 }
7056 }
7057
7058 if (context_maybeSet (FLG_IFBLOCK))
7059 {
7060 if (!tEmptyErr
7061 && exprNode_isDefined (tclause)
7062 && !exprNode_isBlock (tclause))
7063 {
7064 voptgenerror (FLG_IFBLOCK,
7065 message
7066 ("Body of if clause of if statement is not a block: %s",
7067 exprNode_unparse (tclause)),
7068 exprNode_loc (tclause));
7069 }
7070
7071 if (!eEmptyErr
7072 && exprNode_isDefined (eclause)
7073 && !exprNode_isBlock (eclause)
7074 && !(eclause->kind == XPR_IF)
7075 && !(eclause->kind == XPR_IFELSE))
7076 {
7077 voptgenerror
7078 (FLG_IFBLOCK,
7079 message
7080 ("Body of else clause of if statement is not a block: %s",
7081 exprNode_unparse (eclause)),
7082 exprNode_loc (eclause));
7083 }
7084 }
7085
7086 if (context_maybeSet (FLG_ELSEIFCOMPLETE))
7087 {
7088 if (exprNode_isDefined (eclause)
7089 && (eclause->kind == XPR_IF))
7090 {
7091 voptgenerror (FLG_ELSEIFCOMPLETE,
7092 message ("Incomplete else if logic (no final else): %s",
7093 exprNode_unparse (eclause)),
7094 exprNode_loc (eclause));
7095 }
7096 }
7097
7098 if (exprNode_isError (pred))
7099 {
7100 if (exprNode_isError (tclause))
7101 {
7102 if (exprNode_isError (eclause))
7103 {
7ebcc5bb 7104 ret = exprNode_createLoc (ctype_unknown, fileloc_copy (g_currentloc));
616915dd 7105 }
7106 else
7107 {
7108 ret = exprNode_createPartialCopy (eclause);
7109 }
7110 }
7111 else
7112 {
7113 ret = exprNode_createPartialCopy (tclause);
7114 }
7115 }
7116 else /* pred is okay */
7117 {
7118 ret = exprNode_createPartialCopy (pred);
7119
7120 if (exprNode_mustEscape (pred))
7121 {
7122 voptgenerror
7123 (FLG_UNREACHABLE,
7124 message ("Predicate always exits: %s", exprNode_unparse (pred)),
7125 exprNode_loc (pred));
7126 }
7127
616915dd 7128 exprNode_checkUse (ret, pred->sref, pred->loc);
616915dd 7129 exprNode_mergeCondUSs (ret, tclause, eclause);
7130 }
7131
7132 ret->kind = XPR_IFELSE;
7133 ret->edata = exprData_makeCond (pred, tclause, eclause);
7134
7135 if (exprNode_isDefined (tclause) && exprNode_isDefined (eclause))
7136 {
7137 exprNode_combineControl (ret, tclause, eclause);
7138 ret->loc = fileloc_update (ret->loc, eclause->loc);
7139 }
7140
7141 return ret;
7142}
7143
7144/*
7145** *allpaths <- TRUE iff all executions paths must go through the switch
7146*/
7147
7148static bool
7149checkSwitchExpr (exprNode test, /*@dependent@*/ exprNode e, /*@out@*/ bool *allpaths)
7150{
7151 exprNodeSList el = exprNode_flatten (e);
7152 bool mustReturn = TRUE; /* find a branch that doesn't */
7153 bool thisReturn = FALSE;
7154 bool hasDefault = FALSE;
7155 bool hasAllMembers = FALSE;
7156 bool inSwitch = FALSE;
7157 bool isEnumSwitch = FALSE;
7158 bool canBreak = FALSE;
7159 bool fallThrough = FALSE;
7160 ctype ct = ctype_unknown;
7161 enumNameSList usedEnums;
7162 enumNameList enums;
7163
7164 if (exprNode_isDefined (test))
7165 {
7166 ctype ttype;
7167
7168 ct = test->typ;
7169 ttype = ctype_realType (ct);
7170
7171 if (ctype_isEnum (ttype))
7172 {
7173 isEnumSwitch = TRUE;
7174 enums = ctype_elist (ttype);
7175 usedEnums = enumNameSList_new ();
7176 }
7177 }
7178
7179 exprNodeSList_elements (el, current)
7180 {
c21b4c87 7181
7182 DPRINTF ((message("checkSwitchExpr current = %s ", exprNode_unparse(current) ) ));
7183
616915dd 7184 if (exprNode_isDefined (current))
7185 {
7186 switch (current->kind)
7187 {
7188 case XPR_FTDEFAULT:
7189 case XPR_DEFAULT:
7190 if (hasDefault)
7191 {
7192 voptgenerror
bb7c2085 7193 (FLG_DUPLICATECASES,
616915dd 7194 message ("Duplicate default cases in switch"),
7195 exprNode_loc (current));
7196 }
7197 /*@fallthrough@*/
7198 case XPR_FTCASE:
7199 case XPR_CASE:
7200 if (current->kind == XPR_DEFAULT || current->kind == XPR_FTDEFAULT)
7201 {
7202 hasDefault = TRUE;
7203 }
7204 else
7205 {
7206 if (isEnumSwitch)
7207 {
7208 exprNode st = exprData_getSingle (current->edata);
7209 uentry ue = exprNode_getUentry (st);
7210
7211 if (uentry_isValid (ue))
7212 {
7213 cstring cname = uentry_rawName (ue);
7214
7215 if (enumNameList_member (/*@-usedef@*/enums/*@=usedef@*/, cname))
7216 {
7217 if (enumNameSList_member
7218 (/*@-usedef@*/usedEnums/*@=usedef@*/, cname))
7219 {
7220 voptgenerror
bb7c2085 7221 (FLG_DUPLICATECASES,
616915dd 7222 message ("Duplicate case in switch: %s",
7223 cname),
7224 current->loc);
7225 }
7226 else
7227 {
7228 enumNameSList_addh (usedEnums, cname);
7229 }
7230 }
7231 else
7232 {
7233 voptgenerror
7234 (FLG_TYPE,
7235 message ("Case in switch not %s member: %s",
7236 ctype_unparse (ct), cname),
7237 current->loc);
7238 }
7239 }
7240 }
7241 }
7242
7243 if (inSwitch && !fallThrough)
7244 {
7245 if (!thisReturn || canBreak)
7246 {
7247 mustReturn = FALSE;
7248 }
7249 }
7250
7251 fallThrough = TRUE;
7252 inSwitch = TRUE;
7253 thisReturn = FALSE;
7254 canBreak = FALSE;
7255 /*@switchbreak@*/ break;
7256 default:
7257 thisReturn = thisReturn || exprNode_mustEscape (current);
7258 canBreak = canBreak || current->canBreak;
7259 if (canBreak) fallThrough = FALSE;
7260 }
7261 }
7262 } end_exprNodeSList_elements;
7263
7264 if (inSwitch) /* check the last one! */
7265 {
7266 if (!thisReturn || canBreak)
7267 {
7268 mustReturn = FALSE;
7269 }
7270 }
7271
7272 if (isEnumSwitch)
7273 {
7274 if (!hasDefault
7275 && (enumNameSList_size (/*@-usedef@*/usedEnums/*@=usedef@*/) !=
7276 enumNameList_size (/*@-usedef@*/enums/*@=usedef@*/)))
7277 {
7278 enumNameSList unused = enumNameSList_subtract (enums, usedEnums);
7279
7280 voptgenerror (FLG_MISSCASE,
7281 message ("Missing case%s in switch: %q",
7282 cstring_makeLiteralTemp
7283 ((enumNameSList_size (unused) > 1) ? "s" : ""),
7284 enumNameSList_unparse (unused)),
7285 g_currentloc);
7286
7287 enumNameSList_free (unused);
3e3ec469 7288 *allpaths = FALSE; /* evans 2002-01-01 */
616915dd 7289 }
7290 else
7291 {
7292 hasAllMembers = TRUE;
7293 *allpaths = TRUE;
7294 }
7295
7296 enumNameSList_free (usedEnums);
7297 }
7298 else
7299 {
7300 *allpaths = hasDefault;
7301 }
7302
7303 exprNodeSList_free (el);
7304 return ((hasDefault || hasAllMembers) && mustReturn);
7305}
7306
7307exprNode exprNode_switch (/*@only@*/ exprNode e, /*@only@*/ exprNode s)
7308{
7309 exprNode ret = exprNode_createPartialCopy (e);
7310 bool allpaths;
7311
7312 DPRINTF (("Switch: %s", exprNode_unparse (s)));
7313
7314 ret->kind = XPR_SWITCH;
7315 ret->edata = exprData_makePair (e, s);
7316
7317 if (!exprNode_isError (s))
7318 {
7319 exprNode fs = exprNode_firstStatement (s);
7320 ret->loc = fileloc_update (ret->loc, s->loc);
7321
7322 if (exprNode_isUndefined (fs)
7323 || exprNode_isCaseMarker (fs) || exprNode_isLabelMarker (fs)
7324 || exprNode_isDefaultMarker (fs)) {
7325 ;
7326 } else {
7327 voptgenerror (FLG_FIRSTCASE,
7328 message
7329 ("Statement after switch is not a case: %s", exprNode_unparse (fs)),
7330 fs->loc);
7331 }
7332 }
7333
7334 if (!exprNode_isError (e))
7335 {
7336 if (checkSwitchExpr (e, s, &allpaths))
7337 {
7338 ret->exitCode = XK_MUSTRETURN;
7339 }
7340 else
7341 {
7342 ret->exitCode = e->exitCode;
7343 }
7344
7345 ret->canBreak = e->canBreak;
7346 ret->mustBreak = e->mustBreak;
7347 }
7348 /*
7349 ** forgot this!
7350 ** exprNode.c:3883,32: Variable allpaths used before definition
7351 */
7352 else
7353 {
7354 allpaths = FALSE;
7355 }
7356
7357 DPRINTF (("Context exit switch!"));
7358 context_exitSwitch (ret, allpaths);
7359 DPRINTF (("Context exit switch done!"));
7360
7361 return ret;
7362}
7363
7364static void checkInfiniteLoop (/*@notnull@*/ exprNode test,
7365 /*@notnull@*/ exprNode body)
7366{
7367 sRefSet tuses = test->uses;
7368
7369 if (!sRefSet_isEmpty (test->uses))
7370 {
7371 sRefSet sets = sRefSet_newCopy (body->sets);
7372 bool hasError = TRUE;
7373 bool innerState = FALSE;
7374 sRefSet tuncon = sRefSet_undefined;
7375
7376 sets = sRefSet_union (sets, test->sets);
7377 sets = sRefSet_union (sets, body->msets);
7378 sets = sRefSet_union (sets, test->msets);
7379
7380 sRefSet_allElements (tuses, el)
7381 {
7382 if (sRef_isUnconstrained (el))
7383 {
7384 tuncon = sRefSet_insert (tuncon, el);
7385 }
7386 else
7387 {
7388 if (sRefSet_member (sets, el))
7389 {
7390 hasError = FALSE;
7391 break;
7392 }
7393 }
7394
7395 if (sRef_isInternalState (el)
7396 || sRef_isFileStatic (sRef_getRootBase (el)))
7397 {
7398 innerState = TRUE;
7399 }
7400 } end_sRefSet_allElements ;
7401
7402 if (hasError)
7403 {
7404 sRefSet suncon = sRefSet_undefined;
7405 bool sinner = FALSE;
7406
7407 sRefSet_allElements (sets, el)
7408 {
7409 if (sRef_isUnconstrained (el))
7410 {
7411 suncon = sRefSet_insert (suncon, el);
7412 }
7413 else if (sRef_isInternalState (el))
7414 {
7415 sinner = TRUE;
7416 }
7417 else
7418 {
7419 ;
7420 }
7421 } end_sRefSet_allElements ;
7422
7423 if (sinner && innerState)
7424 {
7425 ;
7426 }
7427 else if (sRefSet_isEmpty (tuncon)
7428 && sRefSet_isEmpty (suncon))
7429 {
7430 voptgenerror
7431 (FLG_INFLOOPS,
7432 message
7433 ("Suspected infinite loop. No value used in loop test (%q) "
7434 "is modified by test or loop body.",
7435 sRefSet_unparsePlain (tuses)),
7436 test->loc);
7437 }
7438 else
7439 {
7440 if (sRefSet_isEmpty (tuncon))
7441 {
7442 voptgenerror
7443 (FLG_INFLOOPSUNCON,
7444 message ("Suspected infinite loop. No condition values "
7445 "modified. Modification possible through "
7446 "unconstrained calls: %q",
7447 sRefSet_unparsePlain (suncon)),
7448 test->loc);
7449 }
7450 else
7451 {
7452 voptgenerror
7453 (FLG_INFLOOPSUNCON,
7454 message ("Suspected infinite loop. No condition values "
7455 "modified. Possible undetected dependency through "
7456 "unconstrained calls in loop test: %q",
7457 sRefSet_unparsePlain (tuncon)),
7458 test->loc);
7459 }
7460 }
7461 }
7462
7463 sRefSet_free (sets);
7464 }
7465}
7466
7467exprNode exprNode_while (/*@keep@*/ exprNode t, /*@keep@*/ exprNode b)
7468{
7469 exprNode ret;
7470 bool emptyErr = FALSE;
616915dd 7471
7472 if (context_maybeSet (FLG_WHILEEMPTY))
7473 {
7474 if (exprNode_isEmptyStatement (b))
7475 {
7476 emptyErr = optgenerror
7477 (FLG_WHILEEMPTY,
7478 cstring_makeLiteral
7479 ("Body of while statement is empty"),
7480 exprNode_loc (b));
7481 }
7482 }
7483
7484 if (!emptyErr && context_maybeSet (FLG_WHILEBLOCK))
7485 {
7486 if (exprNode_isDefined (b)
7487 && !exprNode_isBlock (b))
7488 {
7489 if (context_inIterDef ()
7490 && (b->kind == XPR_STMTLIST
7491 || b->kind == XPR_TOK))
7492 {
7493 ; /* no error */
7494 }
7495 else
7496 {
7497 voptgenerror (FLG_WHILEBLOCK,
7498 message
7499 ("Body of while statement is not a block: %s",
7500 exprNode_unparse (b)),
7501 exprNode_loc (b));
7502 }
7503 }
7504 }
7505
7506 if (exprNode_isError (t))
7507 {
7508 if (exprNode_isError (b))
7509 {
7ebcc5bb 7510 ret = exprNode_createLoc (ctype_unknown, fileloc_copy (g_currentloc));
616915dd 7511 }
7512 else
7513 {
7514 ret = exprNode_createPartialCopy (b);
7515 }
7516 }
7517 else
7518 {
7519 exprNode test;
7520
7521 ret = exprNode_createPartialCopy (t);
7522
7523 llassert (t->kind == XPR_WHILEPRED);
7524
7525 test = exprData_getSingle (t->edata);
7526
7527 if (!exprNode_isError (b) && exprNode_isDefined (test))
7528 {
7529 if (context_maybeSet (FLG_INFLOOPS)
7530 || context_maybeSet (FLG_INFLOOPSUNCON))
7531 {
7532 /*
7533 ** check that some variable in the predicate is set by the body
7534 ** if the predicate uses any variables
7535 */
7536
7537 checkInfiniteLoop (test, b);
7538 }
7539
7540 exprNode_mergeUSs (ret, b);
7541
7542 if (exprNode_isDefined (b))
7543 {
7544 ret->exitCode = exitkind_makeConditional (b->exitCode);
7545 }
7546 }
7547 }
7548
7549 ret->edata = exprData_makePair (t, b);
7550 ret->kind = XPR_WHILE;
7551
7552 if (exprNode_isDefined (t) && exprNode_mustEscape (t))
7553 {
7554 voptgenerror
bb7c2085 7555 (FLG_ALWAYSEXITS,
616915dd 7556 message ("Predicate always exits: %s", exprNode_unparse (t)),
7557 exprNode_loc (t));
7558 }
7559
7560 ret->exitCode = XK_NEVERESCAPE;
7561
7562 /*
7563 ** If loop is infinite, and there is no break inside,
7564 ** exit code is never reach.
7565 */
7566
7567 if (exprNode_knownIntValue (t))
7568 {
7569 if (!exprNode_isZero (t))
7570 {
7571 if (exprNode_isDefined (b))
7572 {
7573 if (!b->canBreak)
7574 {
7575 /* Really, it means never reached. */
7576 ret->exitCode = XK_MUSTEXIT;
7577 }
7578 }
7579 }
7580 }
7581 else
7582 {
7583 ;
7584 }
7585
7586 ret->canBreak = FALSE;
7587 ret->mustBreak = FALSE;
7588
7589 return ret;
7590}
7591
7592/*
7593** do { b } while (t);
7594**
7595** note: body passed as first argument
7596*/
7597
7598exprNode exprNode_doWhile (/*@only@*/ exprNode b, /*@only@*/ exprNode t)
7599{
7600 exprNode ret;
8f8721fe 7601
7602 DPRINTF (("Do while: %s / %s",
7603 exprNode_unparse (b), exprNode_unparse (t)));
7604
616915dd 7605 if (exprNode_isError (t))
7606 {
7607 if (exprNode_isError (b))
7608 {
7ebcc5bb 7609 ret = exprNode_createLoc (ctype_unknown, fileloc_copy (g_currentloc));
616915dd 7610 }
7611 else
7612 {
7613 ret = exprNode_createPartialCopy (b);
7614
7615 ret->exitCode = exitkind_makeConditional (b->exitCode);
7616 exprNode_checkUse (ret, b->sref, b->loc);
7617 ret->exitCode = b->exitCode;
7618 ret->canBreak = b->canBreak;
8f8721fe 7619 ret->mustBreak = FALSE;
616915dd 7620 }
7621 }
7622 else
7623 {
8f8721fe 7624 DPRINTF (("Do while: %s / %s",
7625 exitkind_unparse (t->exitCode),
7626 exitkind_unparse (b->exitCode)));
7627
616915dd 7628 ret = exprNode_createPartialCopy (t);
7629 exprNode_checkPred (cstring_makeLiteralTemp ("while"), t);
7630
7631 if (!exprNode_isError (b))
7632 {
7633 /*
7634 ** forgot the copy's --- why wasn't this detected??
7635 */
7636
28bf4b0b 7637 ret->sets = sRefSet_copyInto (ret->sets, b->sets);
7638 ret->msets = sRefSet_copyInto (ret->msets, b->msets);
7639 ret->uses = sRefSet_copyInto (ret->uses, b->uses);
616915dd 7640
7641 /* left this out --- causes and aliasing bug (infinite loop)
7642 should be detected?? */
7643
7644 exprNode_checkUse (ret, b->sref, b->loc);
7645 exprNode_mergeUSs (ret, t);
7646 exprNode_checkUse (ret, t->sref, t->loc);
7647
8f8721fe 7648 /* evans 2001-10-05: while loop can break */
7649 ret->exitCode = exitkind_makeConditional (b->exitCode);
7650
7651 DPRINTF (("Do while: %s",
7652 exitkind_unparse (ret->exitCode)));
7653
616915dd 7654 ret->canBreak = b->canBreak;
8f8721fe 7655
7656 /* Always FALSE for doWhile loops - break's when test is false */
7657 ret->mustBreak = FALSE; /* b->mustBreak; */
616915dd 7658 }
7659 }
7660
7661 context_exitDoWhileClause (t);
7662
7663 ret->kind = XPR_DOWHILE;
7664 ret->edata = exprData_makePair (t, b);
7ebcc5bb 7665 return ret;
616915dd 7666}
7667
3e3ec469 7668bool exprNode_loopMustExec (exprNode forPred)
7669{
7670 /*
7671 ** Returns true if it is obvious that the loop always executes at least once
7672 **
7673 ** For now, we only identify the most obvious cases. Should be true anytime
7674 ** we can prove init => !test.
7675 */
7676
7677 if (exprNode_isDefined (forPred))
7678 {
7679 exprNode init, test, inc;
7680 exprData edata;
7681
7682 llassert (forPred->kind == XPR_FORPRED);
7683
7684 edata = forPred->edata;
7685 init = exprData_getTripleInit (edata);
7686 test = exprData_getTripleTest (edata);
7687 inc = exprData_getTripleInc (edata);
7688
7689 if (exprNode_isAssign (init))
7690 {
7691 exprNode loopVar = exprData_getOpA (init->edata);
7692 exprNode loopInit = exprData_getOpB (init->edata);
7693
7694 if (exprNode_isDefined (test) && test->kind == XPR_OP)
7695 {
7696 exprNode testVar = exprData_getOpA (test->edata);
7697 exprNode testVal = exprData_getOpB (test->edata);
7698 lltok comp = exprData_getOpTok (test->edata);
7699 int opid = lltok_getTok (comp);
7700
7701 DPRINTF (("Same storage: %s / %s", exprNode_unparse (loopVar),
7702 exprNode_unparse (testVar)));
7703
7704 if (exprNode_sameStorage (loopVar, testVar))
7705 {
7706 multiVal valinit = exprNode_getValue (loopInit);
7707 multiVal valtest = exprNode_getValue (testVal);
7708
7709 DPRINTF (("Values: %s / %s", multiVal_unparse (valinit),
7710 multiVal_unparse (valtest)));
7711
7712 if (multiVal_isInt (valinit) && multiVal_isInt (valtest))
7713 {
7714 long v1 = multiVal_forceInt (valinit);
7715 long v2 = multiVal_forceInt (valtest);
7716
7717 DPRINTF (("Here: %ld %ld", v1, v2));
7718
7719 if ((opid == EQ_OP && v1 < v2)
7720 || (opid == NE_OP && v1 != v2)
7721 || (opid == TLT && v1 <= v2)
7722 || (opid == TGT && v1 >= v2)
7723 || (opid == LE_OP && v1 < v2)
7724 || (opid == GE_OP && v1 > v2))
7725 {
7726 DPRINTF (("mustexec if inc"));
7727 return TRUE;
7728 }
7729 }
7730 }
7731 }
7732 }
7733 }
7734
7735 DPRINTF (("loop must exec: FALSE"));
7736 return FALSE;
7737}
7738
616915dd 7739exprNode exprNode_for (/*@keep@*/ exprNode inc, /*@keep@*/ exprNode body)
7740{
7741 exprNode ret;
7742 bool emptyErr = FALSE;
7743
7744 if (context_maybeSet (FLG_FOREMPTY))
7745 {
7746 if (exprNode_isEmptyStatement (body))
7747 {
7748 emptyErr = optgenerror
7749 (FLG_FOREMPTY,
7750 cstring_makeLiteral
7751 ("Body of for statement is empty"),
7752 exprNode_loc (body));
7753 }
7754 }
7755
7756 if (!emptyErr && context_maybeSet (FLG_FORBLOCK))
7757 {
7758 if (exprNode_isDefined (body)
7759 && !exprNode_isBlock (body))
7760 {
7761 if (context_inIterDef ()
7762 && (body->kind == XPR_STMTLIST
7763 || body->kind == XPR_TOK))
7764 {
7765 ; /* no error */
7766 }
7767 else
7768 {
7769 voptgenerror (FLG_FORBLOCK,
7770 message
7771 ("Body of for statement is not a block: %s",
7772 exprNode_unparse (body)),
7773 exprNode_loc (body));
7774 }
7775 }
7776 }
7777
7778 /*
7779 ** for ud purposes: (alreadly) init -> test -> (now) LOOP: body + inc + test
7780 */
7781
7782 if (exprNode_isError (body))
7783 {
7784 ret = exprNode_createPartialCopy (inc);
7785 }
7786 else
7787 {
7788 ret = exprNode_createPartialCopy (body);
7789
7790 ret->exitCode = exitkind_makeConditional (body->exitCode);
7791
3e3ec469 7792 exprNode_mergeUSs (inc, body);
616915dd 7793
7794 if (exprNode_isDefined (inc))
7795 {
7796 exprNode tmp;
7797
7798 context_setMessageAnnote (cstring_makeLiteral ("in post loop increment"));
616915dd 7799
7800 tmp = exprNode_effect (exprData_getTripleInc (inc->edata));
7801 exprNode_freeShallow (tmp);
7802
7803 context_clearMessageAnnote ();
7804 context_setMessageAnnote (cstring_makeLiteral ("in post loop test"));
7805
7806 tmp = exprNode_effect (exprData_getTripleTest (inc->edata));
7807 exprNode_freeShallow (tmp);
7808
7809 context_clearMessageAnnote ();
7810
28bf4b0b 7811 ret->uses = sRefSet_copyInto (ret->uses, inc->uses);
7812 ret->sets = sRefSet_copyInto (ret->sets, inc->sets);
7813 ret->msets = sRefSet_copyInto (ret->msets, inc->msets);
616915dd 7814 }
7815 }
7816
7817 ret->kind = XPR_FOR;
7818 ret->edata = exprData_makePair (inc, body);
7819
7820 if (exprNode_isDefined (inc)) {
7821 exprNode test = exprData_getTripleTest (inc->edata);
7822
7823 if (exprNode_isUndefined (test)) {
7824 if (exprNode_isDefined (body)) {
7825 if (!body->canBreak) {
7826 /* Really, it means never reached. */
7827 ret->exitCode = XK_MUSTEXIT;
7828 }
7829 }
7830 }
7831 }
7832
7833 return (ret);
7834}
7835
7836/*
7837** for (init; test; inc)
7838** ==>
7839** init;
7840** while (test) { body; inc; }
7841**
7842** Now: check use of init (may set vars for test)
7843** check use of test
7844** no checks on inc
7845_*/
7846
7847/*@observer@*/ guardSet exprNode_getForGuards (exprNode pred)
7848{
7849 exprNode test;
7850
7851 if (exprNode_isError (pred)) return guardSet_undefined;
7852
7853 llassert (pred->kind == XPR_FORPRED);
7854
7855 test = exprData_getTripleTest (pred->edata);
7856
7857 if (!exprNode_isError (test))
7858 {
7859 return (test->guards);
7860 }
7861
7862 return guardSet_undefined;
7863}
7864
7865exprNode exprNode_whilePred (/*@only@*/ exprNode test)
7866{
7867 exprNode ret = exprNode_createSemiCopy (test);
7868
7869 if (exprNode_isDefined (test))
7870 {
7871 exprNode_copySets (ret, test);
7872 exprNode_checkPred (cstring_makeLiteralTemp ("while"), test);
7873 exprNode_checkUse (ret, test->sref, test->loc);
7874
7875 exprNode_produceGuards (test);
7876
7877 ret->guards = guardSet_copy (test->guards);
7878 }
7879
7880 ret->edata = exprData_makeSingle (test);
7881 ret->kind = XPR_WHILEPRED;
7882 return ret;
7883}
7884
7885exprNode exprNode_forPred (/*@only@*/ exprNode init, /*@only@*/ exprNode test,
7886 /*@only@*/ exprNode inc)
7887{
7888 exprNode ret;
7889
7890 /*
7891 ** for ud purposes: init -> test -> LOOP: [ body, inc ]
7892 */
7893
7894 exprNode_checkPred (cstring_makeLiteralTemp ("for"), test);
7895
7896 if (!exprNode_isError (inc))
7897 {
7898 ret = exprNode_createPartialCopy (inc);
7899 }
7900 else
7901 {
7902 if (!exprNode_isError (init))
7903 {
7904 ret = exprNode_createPartialCopy (init);
7905 }
7906 else if (!exprNode_isError (test))
7907 {
7908 ret = exprNode_createPartialCopy (test);
7909 }
7910 else
7911 {
7912 ret = exprNode_createUnknown ();
7913 }
7914 }
7915
7916 exprNode_mergeUSs (ret, init);
7917
7918 if (exprNode_isDefined (init))
7919 {
7920 exprNode_checkUse (ret, init->sref, init->loc);
7921 }
7922
7923 exprNode_mergeUSs (ret, test);
7924
7925 if (exprNode_isDefined (test))
7926 {
7927 exprNode_checkUse (ret, test->sref, test->loc);
7928 }
7929
7930 ret->kind = XPR_FORPRED;
7931 ret->edata = exprData_makeFor (init, test, inc);
7932 return (ret);
7933}
7934
7935/*@notnull@*/ /*@only@*/ exprNode exprNode_goto (/*@only@*/ cstring label)
7936{
7937 exprNode ret = exprNode_createUnknown ();
7938
7939 if (context_inMacro ())
7940 {
7941 voptgenerror (FLG_MACROSTMT,
7942 message ("Macro %s uses goto (not functional)",
7943 context_inFunctionName ()),
7944 g_currentloc);
7945 }
7946
7947 ret->kind = XPR_GOTO;
7948 ret->edata = exprData_makeLiteral (label);
7949 ret->mustBreak = TRUE;
7950 ret->exitCode = XK_GOTO;
7951 ret->canBreak = TRUE;
7952 return ret;
7953}
7954
7955exprNode exprNode_continue (/*@only@*/ lltok l, int qcontinue)
7956{
7957 exprNode ret = exprNode_createLoc (ctype_unknown, fileloc_copy (lltok_getLoc (l)));
7958
7959 ret->kind = XPR_CONTINUE;
7960 ret->edata = exprData_makeTok (l);
7961 ret->canBreak = TRUE;
7962 ret->mustBreak = TRUE;
7963
7964 if (qcontinue == QSAFEBREAK)
7965 {
7966 ; /* no checking */
7967 }
7968 else if (qcontinue == QINNERCONTINUE)
7969 {
7970 if (!context_inDeepLoop ())
7971 {
7972 voptgenerror
7973 (FLG_LOOPLOOPCONTINUE,
7974 cstring_makeLiteral ("Continue statement marked with innercontinue "
7975 "is not inside a nested loop"),
7976 exprNode_loc (ret));
7977 }
7978 }
7979 else if (qcontinue == BADTOK)
7980 {
7981 if (context_inDeepLoop ())
7982 {
7983 voptgenerror
7984 (FLG_LOOPLOOPCONTINUE,
7985 cstring_makeLiteral ("Continue statement in nested loop"),
7986 exprNode_loc (ret));
7987 }
7988 }
7989 else
7990 {
7991 llbuglit ("exprNode_continue: bad qcontinue");
7992 }
7993
7994 return ret;
7995}
7996
7997exprNode exprNode_break (/*@only@*/ lltok l, int bqual)
7998{
7999 exprNode ret = exprNode_createLoc (ctype_unknown, fileloc_copy (lltok_getLoc (l)));
8000 clause breakClause = context_breakClause ();
8001
8002 ret->kind = XPR_BREAK;
8003 ret->edata = exprData_makeTok (l);
8004 ret->canBreak = TRUE;
8005 ret->mustBreak = TRUE;
8006
8007 if (breakClause == NOCLAUSE)
8008 {
8009 voptgenerror
8010 (FLG_SYNTAX,
8011 cstring_makeLiteral ("Break not inside while, for or switch statement"),
8012 exprNode_loc (ret));
8013 }
8014 else
8015 {
8016 if (bqual != BADTOK)
8017 {
8018 switch (bqual)
8019 {
8020 case QSAFEBREAK:
8021 break;
8022 case QINNERBREAK:
8023 if (breakClause == SWITCHCLAUSE)
8024 {
8025 if (!context_inDeepSwitch ())
8026 {
8027 voptgenerror (FLG_SYNTAX,
8028 cstring_makeLiteral
8029 ("Break preceded by innerbreak is not in a deep switch"),
8030 exprNode_loc (ret));
8031 }
8032 }
8033 else
8034 {
8035 if (!context_inDeepLoop ())
8036 {
8037 voptgenerror (FLG_SYNTAX,
8038 cstring_makeLiteral
8039 ("Break preceded by innerbreak is not in a deep loop"),
8040 exprNode_loc (ret));
8041 }
8042 }
8043 break;
8044 case QLOOPBREAK:
8045 if (breakClause == SWITCHCLAUSE)
8046 {
8047 voptgenerror (FLG_SYNTAX,
8048 cstring_makeLiteral
8049 ("Break preceded by loopbreak is breaking a switch"),
8050 exprNode_loc (ret));
8051 }
8052 break;
8053 case QSWITCHBREAK:
8054 if (breakClause != SWITCHCLAUSE)
8055 {
8056 voptgenerror
8057 (FLG_SYNTAX,
8058 message ("Break preceded by switchbreak is breaking %s",
8059 cstring_makeLiteralTemp
8060 ((breakClause == WHILECLAUSE
8061 || breakClause == DOWHILECLAUSE) ? "a while loop"
8062 : (breakClause == FORCLAUSE) ? "a for loop"
8063 : (breakClause == ITERCLAUSE) ? "an iterator"
8064 : "<error loop>")),
8065 exprNode_loc (ret));
8066 }
8067 break;
8068 BADDEFAULT;
8069 }
8070 }
8071 else
8072 {
8073 if (breakClause == SWITCHCLAUSE)
8074 {
8075 clause nextBreakClause = context_nextBreakClause ();
8076
8077 switch (nextBreakClause)
8078 {
8079 case NOCLAUSE: break;
8080 case WHILECLAUSE:
8081 case DOWHILECLAUSE:
8082 case FORCLAUSE:
8083 case ITERCLAUSE:
8084 voptgenerror
8085 (FLG_LOOPSWITCHBREAK,
8086 cstring_makeLiteral ("Break statement in switch inside loop"),
8087 exprNode_loc (ret));
8088 break;
8089 case SWITCHCLAUSE:
8090 voptgenerror
8091 (FLG_SWITCHSWITCHBREAK,
8092 cstring_makeLiteral ("Break statement in switch inside switch"),
8093 exprNode_loc (ret));
8094 break;
8095 BADDEFAULT;
8096 }
8097 }
8098 else
8099 {
8100 if (context_inDeepLoop ())
8101 {
8102 voptgenerror
8103 (FLG_LOOPLOOPBREAK,
8104 cstring_makeLiteral ("Break statement in nested loop"),
8105 exprNode_loc (ret));
8106 }
8107 else
8108 {
8109 if (context_inDeepLoopSwitch ())
8110 {
8111 voptgenerror
8112 (FLG_SWITCHLOOPBREAK,
8113 cstring_makeLiteral ("Break statement in loop inside switch"),
8114 exprNode_loc (ret));
8115 }
8116 }
8117 }
8118 }
8119 }
8120
8121 return ret;
8122}
8123
8124exprNode exprNode_nullReturn (/*@only@*/ lltok t)
8125{
8126 fileloc loc = lltok_getLoc (t);
8127 exprNode ret = exprNode_createLoc (ctype_unknown, fileloc_copy (loc));
8128
8129 context_returnFunction ();
8130 exprChecks_checkNullReturn (loc);
8131
8132 ret->kind = XPR_NULLRETURN;
8133 ret->edata = exprData_makeTok (t);
8134 ret->exitCode = XK_MUSTRETURN;
8135 return ret;
8136}
8137
8138exprNode exprNode_return (/*@only@*/ exprNode e)
8139{
8140 exprNode ret;
8141
8142 if (exprNode_isError (e))
8143 {
8144 ret = exprNode_createUnknown ();
8145 }
8146 else
8147 {
8148 ret = exprNode_createLoc (ctype_unknown, fileloc_copy (e->loc));
8149
8150 exprNode_checkUse (ret, e->sref, e->loc);
8151 exprNode_checkReturn (e);
8152 }
8153
8154 context_returnFunction ();
8155 ret->kind = XPR_RETURN;
8156 ret->edata = exprData_makeSingle (e);
8157 ret->exitCode = XK_MUSTRETURN;
8158
8159 return (ret);
8160}
8161
8162exprNode exprNode_comma (/*@only@*/ exprNode e1, /*@only@*/ exprNode e2)
8163{
8164 exprNode ret;
8165
8166 if (exprNode_isError (e1))
8167 {
8168 if (exprNode_isError (e2))
8169 {
7ebcc5bb 8170 ret = exprNode_createLoc (ctype_unknown, fileloc_copy (g_currentloc));
616915dd 8171 }
8172 else
8173 {
8174 ret = exprNode_createPartialCopy (e2);
8175 exprNode_checkUse (ret, e2->sref, e2->loc);
8176 ret->sref = e2->sref;
8177 }
8178 }
8179 else
8180 {
8181 ret = exprNode_createPartialCopy (e1);
8182
8183 exprNode_checkUse (ret, e1->sref, e1->loc);
8184
8185 if (!exprNode_isError (e2))
8186 {
8187 exprNode_mergeUSs (ret, e2);
8188 exprNode_checkUse (ret, e2->sref, e2->loc);
8189 ret->sref = e2->sref;
8190 }
8191 }
8192
8193 ret->kind = XPR_COMMA;
8194 ret->edata = exprData_makePair (e1, e2);
8195
8196 if (exprNode_isDefined (e1))
8197 {
8198 if (exprNode_isDefined (e2))
8199 {
8200 ret->typ = e2->typ;
8201
8202 if (exprNode_mustEscape (e1) || e1->mustBreak)
8203 {
8204 voptgenerror
8205 (FLG_UNREACHABLE,
8206 message ("Second clause of comma expression is unreachable: %s",
8207 exprNode_unparse (e2)),
8208 exprNode_loc (e2));
8209 }
8210
8211 ret->exitCode = exitkind_combine (e1->exitCode, e2->exitCode);
8212 ret->mustBreak = e1->mustBreak || e2->mustBreak;
8213 ret->canBreak = e1->canBreak || e2->canBreak;
8214 }
8215 else
8216 {
8217 if (exprNode_mustEscape (e1) || e1->mustBreak)
8218 {
8219 voptgenerror
8220 (FLG_UNREACHABLE,
8221 message ("Second clause of comma expression is unreachable: %s",
8222 exprNode_unparse (e2)),
8223 exprNode_loc (e2));
8224 }
8225
8226 ret->exitCode = e1->exitCode;
8227 ret->canBreak = e1->canBreak;
8228 }
8229 }
8230 else
8231 {
8232 if (exprNode_isDefined (e2))
8233 {
8234 ret->exitCode = e2->exitCode;
8235 ret->mustBreak = e2->mustBreak;
8236 ret->canBreak = e2->canBreak;
8237 }
8238 }
8239
8240 return (ret);
8241}
8242
8243static bool exprNode_checkOneInit (/*@notnull@*/ exprNode el, exprNode val)
8244{
8245 ctype t1 = exprNode_getType (el);
8246 ctype t2 = exprNode_getType (val);
8247 bool hasError = FALSE;
8248
146e25eb 8249 DPRINTF (("Check one init: %s / %s",
8250 exprNode_unparse (el),
8251 exprNode_unparse (val)));
8252
616915dd 8253 if (ctype_isUnknown (t1))
8254 {
8255 voptgenerror (FLG_IMPTYPE,
8256 message ("Variable has unknown (implicitly int) type: %s",
8257 exprNode_unparse (el)),
8258 el->loc);
8259
8260 t1 = ctype_int;
8261 el->typ = ctype_int;
8262 }
8263
8264 if (exprNode_isDefined (val) && val->kind == XPR_INITBLOCK)
8265 {
8266 exprNodeList vals = exprData_getArgs (val->edata);
077d4458 8267
7534721d 8268 DPRINTF (("Check one init: %s", exprNodeList_unparse (vals)));
8269 DPRINTF (("Type: %s", ctype_unparse (t1)));
8270
616915dd 8271 if (ctype_isRealAP (t1))
8272 {
8273 int i = 0;
8274 int nerrors = 0;
8275
7534721d 8276 if (ctype_isFixedArray (t1))
8277 {
37ae0b5e 8278 size_t nelements = ctype_getArraySize (t1);
7534721d 8279
077d4458 8280 DPRINTF (("Checked array: %s / %d",
8281 ctype_unparse (t1), nelements));
8282
7534721d 8283 if (exprNode_isStringLiteral (val))
8284 {
8285 exprNode_checkStringLiteralLength (t1, val);
8286 }
8287 else
8288 {
37ae0b5e 8289 if (exprNodeList_size (vals) != size_toInt (nelements))
7534721d 8290 {
8291 hasError = optgenerror
37ae0b5e 8292 (exprNodeList_size (vals) > size_toInt (nelements)
8293 ? FLG_INITSIZE : FLG_INITALLELEMENTS,
7534721d 8294 message ("Initializer block for "
8295 "%s has %d element%&, but declared as %s: %q",
8296 exprNode_unparse (el),
8297 exprNodeList_size (vals),
8298 ctype_unparse (t1),
8299 exprNodeList_unparse (vals)),
8300 val->loc);
8301 }
8302 }
8303 }
8304
616915dd 8305 exprNodeList_elements (vals, oneval)
8306 {
8307 cstring istring = message ("%d", i);
8308 exprNode newel =
8309 exprNode_arrayFetch
8310 (exprNode_fakeCopy (el),
8311 exprNode_numLiteral (ctype_int, istring,
8312 fileloc_copy (el->loc), i));
8313
8314 if (exprNode_isDefined (newel))
8315 {
8316 if (exprNodeList_size (vals) == 1
8317 && ctype_isString (exprNode_getType (oneval))
8318 && ctype_isChar (exprNode_getType (newel)))
8319 {
8320 exprNode_freeIniter (newel);
8321 }
8322 else
8323 {
8324 if (exprNode_checkOneInit (newel, oneval))
8325 {
8326 hasError = TRUE;
8327 nerrors++;
8328
8329 if (nerrors > 3 && exprNodeList_size (vals) > 6)
8330 {
8331 llgenmsg
8332 (message ("Additional initialization errors "
8333 "for %s not reported",
8334 exprNode_unparse (el)),
8335 exprNode_loc (el));
8336 exprNode_freeIniter (newel);
8337 break;
8338 }
8339 else
8340 {
8341 exprNode_freeIniter (newel);
8342 }
8343 }
8344 else
8345 {
8346 exprNode_freeIniter (newel);
8347 }
8348 }
8349 }
8350
8351 cstring_free (istring);
8352 i++;
8353 /*@-branchstate@*/
8354 } end_exprNodeList_elements;
8355 /*@=branchstate@*/
8356 }
8357 else if (ctype_isStruct (ctype_realType (t1)))
8358 {
8359 uentryList fields = ctype_getFields (t1);
8360 int i = 0;
8361
8362 if (uentryList_size (fields) != exprNodeList_size (vals))
8363 {
8364 if (uentryList_size (fields) > exprNodeList_size (vals))
8365 {
8366 hasError = optgenerror
8367 (FLG_FULLINITBLOCK,
8368 message ("Initializer block for "
28bf4b0b 8369 "%s has %d field%&, but %s has %d field%&: %q",
616915dd 8370 exprNode_unparse (el),
8371 exprNodeList_size (vals),
8372 ctype_unparse (t1),
8373 uentryList_size (fields),
8374 exprNodeList_unparse (vals)),
8375 val->loc);
8376 }
8377 else
8378 {
8379 hasError = optgenerror
8380 (FLG_TYPE,
8381 message ("Initializer block for "
28bf4b0b 8382 "%s has %d field%&, but %s has %d field%&: %q",
616915dd 8383 exprNode_unparse (el),
8384 exprNodeList_size (vals),
8385 ctype_unparse (t1),
8386 uentryList_size (fields),
8387 exprNodeList_unparse (vals)),
8388 val->loc);
8389 }
8390 }
8391 else
8392 {
8393 exprNodeList_elements (vals, oneval)
8394 {
8395 uentry thisfield = uentryList_getN (fields, i);
8396 exprNode newel =
28bf4b0b 8397 exprNode_fieldAccessAux (exprNode_fakeCopy (el),
8398 exprNode_loc (el),
8399 uentry_getName (thisfield));
616915dd 8400
8401 if (exprNode_isDefined (newel))
8402 {
8403 if (exprNode_checkOneInit (newel, oneval))
8404 {
8405 hasError = TRUE;
8406 }
8407
8408 exprNode_freeIniter (newel);
8409 }
8410
8411 i++;
8412 } end_exprNodeList_elements;
8413 }
8414 }
146e25eb 8415 /* evans 2001-12-30: added to fix bug reported by Jim Zelenka */
8416 else if (ctype_isUnion (ctype_realType (t1)))
8417 {
8418 uentryList fields = ctype_getFields (t1);
8419 int i = 0;
8420
8421 /*
8422 ** Union initializers set the first member always.
8423 */
8424
8425 DPRINTF (("Union initializer: %s / %s",
8426 exprNode_unparse (el), ctype_unparse (ctype_realType (t1))));
8427
8428 if (exprNodeList_size (vals) != 1)
8429 {
8430 hasError = optgenerror
8431 (FLG_TYPE,
8432 message ("Initializer block for union "
8433 "%s has %d elements, union initializers should have one element: %q",
8434 exprNode_unparse (el),
8435 exprNodeList_size (vals),
8436 exprNodeList_unparse (vals)),
8437 val->loc);
8438 }
8439 else
8440 {
8441 exprNode oneval = exprNodeList_head (vals);
8442 uentry thisfield = uentryList_getN (fields, i);
8443 exprNode newel =
8444 exprNode_fieldAccessAux (exprNode_fakeCopy (el),
8445 exprNode_loc (el),
8446 uentry_getName (thisfield));
8447
8448 if (exprNode_isDefined (newel))
8449 {
8450 if (exprNode_checkOneInit (newel, oneval))
8451 {
8452 hasError = TRUE;
8453 }
8454
8455 exprNode_freeIniter (newel);
8456 }
8457 }
8458 }
616915dd 8459 else
8460 {
8461 hasError = optgenerror
8462 (FLG_TYPE,
8463 message ("Initializer block used for "
8464 "%s where %t is expected: %s",
8465 exprNode_unparse (el), t1, exprNode_unparse (val)),
8466 val->loc);
8467 }
8468 }
8469 else
8470 {
8471 if (exprNode_isDefined (val))
8472 {
8473 doAssign (el, val, TRUE);
8474
8475 if (!exprNode_matchType (t1, val))
8476 {
8477 hasError = gentypeerror
8478 (t1, val, t2, el,
8479 message ("Initial value of %s is type %t, "
8480 "expects %t: %s",
8481 exprNode_unparse (el),
8482 t2, t1, exprNode_unparse (val)),
8483 val->loc);
8484 }
8485 }
8486 }
8487
8488 return hasError;
8489}
8490
abd7f895 8491static /*@notnull@*/ exprNode
28bf4b0b 8492exprNode_makeInitializationAux (/*@temp@*/ idDecl t)
8493{
8494 exprNode ret;
8495
146e25eb 8496 DPRINTF (("Initialization: %s", idDecl_unparse (t)));
8497
28bf4b0b 8498 if (usymtab_exists (idDecl_observeId (t)))
8499 {
8500 uentry ue = usymtab_lookup (idDecl_observeId (t));
8501 ret = exprNode_createId (ue);
28bf4b0b 8502 }
8503 else
8504 {
7ebcc5bb 8505 uentry ue;
8506
8507 DPRINTF (("Unrecognized: %s", idDecl_unparse (t)));
8508
8509 ue = uentry_makeUnrecognized (idDecl_observeId (t), fileloc_copy (g_currentloc));
28bf4b0b 8510 ret = exprNode_fromIdentifierAux (ue);
8511
8512 /*
8513 ** No error - this happens in old style declarations:
8514
8515 voptgenerror
8516 (FLG_UNRECOG,
8517 message ("Unrecognized identifier in intializer: %s", idDecl_observeId (t)),
8518 g_currentloc);
8519
8520 **
8521 */
8522 }
8523
8524 exprData_free (ret->edata, ret->kind);
8525 ret->edata = exprData_undefined;
8526 ret->exitCode = XK_NEVERESCAPE;
8527 ret->mustBreak = FALSE;
8528 ret->kind = XPR_INIT;
8529 return ret;
8530}
8531
8532exprNode exprNode_makeEmptyInitialization (/*@only@*/ idDecl t)
8533{
8534 exprNode ret = exprNode_makeInitializationAux (t);
8535 llassert (ret->edata == exprData_undefined);
8536 ret->edata = exprData_makeInit (t, exprNode_undefined);
8537 return ret;
8538}
8539
616915dd 8540exprNode exprNode_makeInitialization (/*@only@*/ idDecl t,
8541 /*@only@*/ exprNode e)
8542{
8543 uentry ue = usymtab_lookup (idDecl_observeId (t));
28bf4b0b 8544 exprNode ret = exprNode_makeInitializationAux (t);
8545 fileloc loc = exprNode_loc (e);
02b84d4b 8546
8547 DPRINTF (("initialization: %s = %s", idDecl_unparse (t), exprNode_unparse (e)));
8548
616915dd 8549 if (exprNode_isError (e))
8550 {
8551 e = exprNode_createUnknown ();
616915dd 8552 /* error: assume initializer is defined */
28bf4b0b 8553 sRef_setDefined (ret->sref, g_currentloc);
02b84d4b 8554 ret->edata = exprData_makeInit (t, e);
616915dd 8555 }
8556 else
8557 {
28bf4b0b 8558 ctype ct = ctype_realishType (ret->typ);
8559
616915dd 8560 /*
8561 ** evs - 9 Apr 1995
8562 **
8563 ** was addSafeUse --- what's the problem?
8564 **
8565 ** int x = 3, y = x ?
8566 */
8567
28bf4b0b 8568 exprData_free (ret->edata, ret->kind);
8569 ret->edata = exprData_makeInit (t, e);
02b84d4b 8570 DPRINTF (("ret: %s", exprNode_unparse (ret)));
28bf4b0b 8571
616915dd 8572 exprNode_checkUse (ret, e->sref, e->loc);
8573
8574 if (ctype_isUnknown (e->typ) && uentry_isValid (ue))
8575 {
8576 exprNode lhs = exprNode_createId (ue);
8577
8578 /*
8579 ** static storage should be undefined before initializing
8580 */
8581
8582 if (uentry_isStatic (ue))
8583 {
8584 sRef_setDefState (lhs->sref, SS_PARTIAL, fileloc_undefined);
8585 }
146e25eb 8586
616915dd 8587 (void) exprNode_checkOneInit (lhs, e);
8588
8589 if (uentry_isStatic (ue))
8590 {
8591 sRef_setDefState (lhs->sref, SS_DEFINED, fileloc_undefined);
8592 }
8593
8594 exprNode_free (lhs);
8595 }
8596 else
8597 {
8598 if (!exprNode_matchType (ct, e))
8599 {
8600 if (exprNode_isZero (e) && ctype_isArrayPtr (ct))
8601 {
8602 ;
8603 }
8604 else
8605 {
8606 (void) gentypeerror
8607 (exprNode_getType (e), e, exprNode_getType (ret), ret,
8608 message
28bf4b0b 8609 ("Variable %q initialized to type %t, expects %t: %s",
8610 uentry_getName (ue), exprNode_getType (e),
616915dd 8611 exprNode_getType (ret),
8612 exprNode_unparse (e)),
8613 e->loc);
8614 }
8615 }
8616 }
8617
8618 if (uentry_isStatic (ue))
8619 {
8620 sRef_setDefState (ret->sref, SS_PARTIAL, fileloc_undefined);
8621 }
37ae0b5e 8622
02b84d4b 8623 if (exprNode_isStringLiteral (e)
8624 && (ctype_isArray (ct))
8625 && (ctype_isChar (ctype_realType (ctype_baseArrayPtr (ct)))))
8626 {
8627 /*
8628 ** If t is a char [], the literal is copied.
8629 */
8630
37ae0b5e 8631 exprNode_checkStringLiteralLength (ct, e);
8632 sRef_setDefState (ret->sref, SS_DEFINED, e->loc);
8633 ret->val = multiVal_copy (e->val);
616915dd 8634
37ae0b5e 8635 sRef_setNullTerminatedState (ret->sref);
8636
02b84d4b 8637 if (multiVal_isDefined (e->val))
8638 {
37ae0b5e 8639 cstring slit = multiVal_forceString (e->val);
e5081f8c 8640 sRef_setLen (ret->sref, size_toInt (cstring_length (slit) + 1));
02b84d4b 8641 }
8642
37ae0b5e 8643 if (ctype_isFixedArray (ct))
02b84d4b 8644 {
37ae0b5e 8645 sRef_setSize (ret->sref, size_toInt (ctype_getArraySize (ct)));
02b84d4b 8646 }
8647 }
8648 else
02b84d4b 8649 {
8650 doAssign (ret, e, TRUE);
8651 }
616915dd 8652
8653 if (uentry_isStatic (ue))
8654 {
8655 sRef_setDefState (ret->sref, SS_DEFINED, fileloc_undefined);
8656 }
8657 }
02b84d4b 8658
616915dd 8659 if (context_inIterDef ())
8660 {
8661 /* should check if it is yield */
8662 uentry_setUsed (ue, loc);
8663 }
8664 else
8665 {
28bf4b0b 8666 ;
616915dd 8667 }
8668
616915dd 8669 exprNode_mergeUSs (ret, e);
02b84d4b 8670 DPRINTF (("Ret: %s %p %p",
8671 exprNode_unparse (ret),
8672 ret->requiresConstraints,
8673 ret->ensuresConstraints));
8674
8675 DPRINTF (("Ret: %s %s %s",
8676 exprNode_unparse (ret),
8677 constraintList_unparse (ret->requiresConstraints),
8678 constraintList_unparse (ret->ensuresConstraints)));
616915dd 8679 return ret;
8680}
8681
8682exprNode exprNode_iter (/*@observer@*/ uentry name,
8683 /*@only@*/ exprNodeList alist,
8684 /*@only@*/ exprNode body,
8685 /*@observer@*/ uentry end)
8686{
8687 exprNode ret;
8688 cstring iname;
8689
8690 llassert (uentry_isValid (name));
8691
8692 uentry_setUsed (name, exprNode_loc (body));
8693
8694 ret = exprNode_createPartialCopy (body);
8695 iname = uentry_getName (name);
8696
8697 if (uentry_isInvalid (end))
8698 {
bb7c2085 8699 llerror (FLG_ITERBALANCE,
616915dd 8700 message ("Iter %s not balanced with end_%s", iname, iname));
8701 }
8702 else
8703 {
8704 cstring ename = uentry_getName (end);
8705
68de3f33 8706 if (!cstring_equalPrefixLit (ename, "end_"))
616915dd 8707 {
bb7c2085 8708 llerror (FLG_ITERBALANCE, message ("Iter %s not balanced with end_%s: %s",
616915dd 8709 iname, iname, ename));
8710 }
8711 else
8712 {
8713 if (!cstring_equal (iname, cstring_suffix (ename, 4)))
8714 {
bb7c2085 8715 llerror (FLG_ITERBALANCE,
616915dd 8716 message ("Iter %s not balanced with end_%s: %s",
8717 iname, iname, ename));
8718 }
8719 }
8720
8721 cstring_free (ename);
8722 }
8723
8724 context_exitIterClause (body);
8725
8726 ret->kind = XPR_ITER;
8727 ret->edata = exprData_makeIter (name, alist, body, end);
8728
8729 if (uentry_isIter (name))
8730 {
8731 (void) checkArgsReal (name, body,
8732 uentry_getParams (name), alist, TRUE, ret);
8733 }
8734
8735 cstring_free (iname);
8736
8737 return ret;
8738}
8739
8740exprNode
8741exprNode_iterNewId (/*@only@*/ cstring s)
8742{
8743 exprNode e = exprNode_new ();
8744 uentry ue = uentryList_getN (uentry_getParams (getCurrentIter ()), iterParamNo ());
8745
8746 llassert (processingIterVars ());
8747
8748 e->loc = context_getSaveLocation ();
8749
8750 if (fileloc_isUndefined (e->loc))
8751 {
8752 fileloc_free (e->loc);
8753 e->loc = fileloc_copy (g_currentloc);
8754 }
8755
8756 e->uses = sRefSet_new ();
8757 e->sets = sRefSet_new ();
8758 e->msets = sRefSet_new ();
8759 e->kind = XPR_VAR;
8760 e->val = multiVal_unknown ();
8761 e->guards = guardSet_new ();
02b84d4b 8762 e->sref = sRef_undefined;
616915dd 8763 e->isJumpPoint = FALSE;
8764 e->exitCode = XK_NEVERESCAPE;
8765
1b8ae690 8766 /*> missing fields, detected by splint <*/
616915dd 8767 e->canBreak = FALSE;
8768 e->mustBreak = FALSE;
8769 e->etext = cstring_undefined;
8770
8771 if (uentry_isYield (ue))
8772 {
8773 uentry uue = uentry_makeVariable (s, uentry_getType (ue),
8774 fileloc_copy (e->loc),
8775 FALSE);
8776 sRef sr;
8777
8778 uue = usymtab_supEntrySrefReturn (uue);
8779
8780 sr = uentry_getSref (uue);
8781 sRef_mergeStateQuiet (sr, uentry_getSref (ue));
8782 sr = uentry_getSref (uue);
8783 sRef_setDefined (sr, e->loc);
8784
8785 e->typ = uentry_getType (uue);
8786 e->sref = sr;
8787 e->edata = exprData_makeId (uue);
8788 uentry_setUsed (uue, g_currentloc);
8789 }
8790 else
8791 {
8792 uentry uue;
8793
8794 sRef_setGlobalScope ();
8795 uue = uentry_makeVariableLoc (s, ctype_unknown);
8796
8797 e->typ = ctype_unknown;
8798 e->edata = exprData_makeId (uue);
8799
8800 uentry_setUsed (uue, e->loc);
8801 uentry_setHasNameError (uue);
8802
8803 if (context_getFlag (FLG_REPEATUNRECOG))
8804 {
8805 uentry_markOwned (uue);
8806 }
8807 else
8808 {
8809 usymtab_supGlobalEntry (uue);
8810 }
8811
8812 sRef_clearGlobalScope ();
8813
8814 voptgenerror (FLG_UNRECOG, message ("Unrecognized identifier: %s", s),
8815 e->loc);
8816 }
8817
8818
8819 cstring_free (s);
84c9ffbf 8820
8821 exprNode_defineConstraints(e);
616915dd 8822 return (e);
8823}
8824
8825exprNode
8826exprNode_iterExpr (/*@returned@*/ exprNode e)
8827{
8828 if (!processingIterVars ())
8829 {
8830 llcontbuglit ("checkIterParam: not in iter");
8831 return e;
8832 }
8833
8834 if (uentry_isYield (uentryList_getN (uentry_getParams (getCurrentIter ()),
8835 iterParamNo ())))
8836 {
8837 if (exprNode_isDefined (e))
8838 {
8839 if (fileloc_isDefined (e->loc))
8840 {
8841 voptgenerror
bb7c2085 8842 (FLG_ITERYIELD,
616915dd 8843 message ("Yield parameter is not simple identifier: %s",
8844 exprNode_unparse (e)),
8845 e->loc);
8846 }
8847 else
8848 {
8849 voptgenerror
bb7c2085 8850 (FLG_ITERYIELD,
616915dd 8851 message ("Yield parameter is not simple identifier: %s",
8852 exprNode_unparse (e)),
8853 g_currentloc);
8854
8855 }
8856 }
8857 }
8858 return e;
8859}
8860
8861exprNode
8862exprNode_iterId (/*@observer@*/ uentry c)
8863{
8864 uentry ue;
8865
8866 llassert (processingIterVars ());
8867
8868 ue = uentryList_getN (uentry_getParams (getCurrentIter ()),
8869 iterParamNo ());
8870
8871 if (uentry_isYield (ue))
8872 {
8873 ctype ct = uentry_getType (ue);
8874 exprNode e = exprNode_createPlain (ct);
8875 cstring name = uentry_getName (c);
8876 uentry le = uentry_makeVariable (name, ct, fileloc_undefined, FALSE);
8877
8878 uentry_setUsed (ue, g_currentloc);
8879 uentry_setHasNameError (ue);
8880
8881 cstring_free (name);
8882
8883 e->kind = XPR_VAR;
8884 e->edata = exprData_makeId (le);
8885 e->loc = context_getSaveLocation ();
8886 e->sref = uentry_getSref (le);
8887
8888 usymtab_supEntrySref (le);
8889
8890 if (!context_inHeader ())
8891 {
8892 if (optgenerror
bb7c2085 8893 (FLG_ITERYIELD,
616915dd 8894 message ("Yield parameter shadows local declaration: %q",
8895 uentry_getName (c)),
8896 fileloc_isDefined (e->loc) ? e->loc : g_currentloc))
8897 {
8898 uentry_showWhereDeclared (c);
8899 }
8900 }
8901
8902 return e;
8903 }
8904
8905 return (exprNode_fromIdentifierAux (c));
8906}
8907
8908exprNode exprNode_iterStart (/*@observer@*/ uentry name, /*@only@*/ exprNodeList alist)
8909{
8910 exprNode ret = exprNode_create (ctype_unknown);
8911
8912 ret->kind = XPR_ITERCALL;
8913 ret->edata = exprData_makeIterCall (name, alist);
8914
8915 if (uentry_isIter (name))
8916 {
8917 uentryList params = uentry_getParams (name);
8918
8919 if (context_inIterDef ()
8920 && uentryList_size (params) == exprNodeList_size (alist))
8921 {
8922 int i = 0;
8923
8924 exprNodeList_elements (alist, arg)
8925 {
8926 uentry parg = uentryList_getN (params, i);
8927
8928 if (uentry_isYield (parg))
8929 {
8930 uentry ue = exprNode_getUentry (arg);
8931
8932 if (uentry_isValid (ue))
8933 {
8934 ;
8935 }
8936 }
8937
8938 i++;
8939 } end_exprNodeList_elements;
8940 }
8941
8942 (void) checkArgsReal (name, ret, params, alist, TRUE, ret);
8943 checkUnspecCall (ret, params, alist);
8944 }
8945
8946 return ret;
8947}
8948
8949/*@exposed@*/ sRef exprNode_getSref (exprNode e)
8950{
8951 if (exprNode_isDefined (e))
8952 {
02b84d4b 8953 if (sRef_isInvalid (e->sref))
616915dd 8954 {
8955 /*@-mods@*/
8956 e->sref = sRef_makeUnknown ();
8957 sRef_setAliasKind (e->sref, AK_ERROR, fileloc_undefined);
8958 /*@=mods@*/
8959 return e->sref;
8960 }
8961 else
8962 {
8963 return e->sref;
8964 }
8965 }
8966 else
8967 {
8968 return sRef_undefined;
8969 }
8970}
8971
8972/*@observer@*/ cstring
8973exprNode_unparseFirst (exprNode e)
8974{
8975 if (exprNode_isDefined (e))
8976 {
8977 cstring ret;
8978
8979 if (e->kind == XPR_STMTLIST
8980 || e->kind == XPR_COMMA || e->kind == XPR_COND)
8981 {
8982 exprNode first = exprData_getPairA (e->edata);
8983
8984 if (exprNode_isDefined (first))
8985 {
8986 return (exprNode_unparseFirst (exprData_getPairA (e->edata)));
8987 }
8988 else
8989 {
8990 return (cstring_makeLiteralTemp ("..."));
8991 }
8992 }
8993
8994 ret = cstring_elide (exprNode_unparse (e), 20);
8995 cstring_markOwned (ret);
8996
8997 return (ret);
8998 }
8999 else
9000 {
9001 return cstring_makeLiteralTemp ("<error>");
9002 }
9003}
9004
9005/*@observer@*/ cstring
28bf4b0b 9006exprNode_unparse (/*@temp@*/ exprNode e)
616915dd 9007{
9008 if (exprNode_isError (e))
9009 {
9010 return cstring_makeLiteralTemp ("<error>");
9011 }
9012
9013 if (cstring_isDefined (e->etext))
9014 {
9015 return e->etext;
9016 }
9017 else
9018 {
9019 cstring ret = exprNode_doUnparse (e);
9020
9021 /*@-modifies@*/ /* benevolent */
9022 e->etext = ret;
9023 /*@=modifies@*/
9024 return ret;
9025 }
9026}
9027
9028/*@observer@*/ fileloc
9029exprNode_loc (exprNode e)
9030{
9031 if (exprNode_isError (e))
9032 {
9033 return (g_currentloc);
9034 }
9035 else
9036 {
9037 return (e->loc);
9038 }
9039}
9040
9041/*
9042** executes exprNode e
9043** recursively rexecutes as though in original parse using
9044** information in e->edata
9045*/
9046
9047static /*@only@*/ exprNodeList exprNodeList_effect (exprNodeList e)
9048{
9049 exprNodeList ret = exprNodeList_new ();
9050
9051 exprNodeList_elements (e, current)
9052 {
9053 exprNodeList_addh (ret, exprNode_effect (current));
9054 } end_exprNodeList_elements;
9055
9056 return ret;
9057}
9058
9059static /*@only@*/ exprNode exprNode_effect (exprNode e)
9060 /*@globals internalState@*/
9061{
9062 bool innerEffect = inEffect;
9063 exprNode ret;
9064 exprData data;
9065
9066 inEffect = TRUE;
9067
9068 context_clearJustPopped ();
9069
9070 if (exprNode_isError (e))
9071 {
9072 ret = exprNode_undefined;
9073 }
9074 else
9075 {
9076 /*
9077 ** Turn off expose and dependent transfer checking.
9078 ** Need to pass exposed internal nodes,
9079 ** [ copying would be a waste! ]
9080 ** [ Actually, I think I wasted a lot more time than its worth ]
9081 ** [ trying to do this. ]
9082 */
9083
9084 /*@-exposetrans@*/
9085 /*@-observertrans@*/
9086 /*@-dependenttrans@*/
9087
9088 data = e->edata;
9089
9090 switch (e->kind)
9091 {
9092 case XPR_PARENS:
9093 ret = exprNode_addParens (exprData_getUopTok (data),
9094 exprNode_effect (exprData_getUopNode (data)));
9095 break;
9096 case XPR_ASSIGN:
9097 ret = exprNode_assign (exprNode_effect (exprData_getOpA (data)),
9098 exprNode_effect (exprData_getOpB (data)),
9099 exprData_getOpTok (data));
9100 break;
9101 case XPR_INITBLOCK:
9102 ret = exprNode_undefined;
9103 break;
9104 case XPR_CALL:
9105 ret = exprNode_functionCall (exprNode_effect (exprData_getFcn (data)),
9106 exprNodeList_effect (exprData_getArgs (data)));
9107 break;
9108 case XPR_EMPTY:
9109 ret = e;
9110 break;
9111
9112 case XPR_LABEL:
9113 ret = e;
9114 break;
9115
9116 case XPR_CONST:
9117 case XPR_VAR:
9118 {
9119 cstring id = exprData_getId (data);
9120 uentry ue = usymtab_lookupSafe (id);
9121
9122 ret = exprNode_fromIdentifierAux (ue);
9123 ret->loc = fileloc_update (ret->loc, e->loc);
9124 break;
9125 }
9126 case XPR_BODY:
9127 ret = e;
9128 break;
9129 case XPR_FETCH:
9130 ret = exprNode_arrayFetch (exprNode_effect (exprData_getPairA (data)),
9131 exprNode_effect (exprData_getPairB (data)));
9132 break;
9133 case XPR_OP:
52e90c0f 9134 /*
9135 ** evans 2002-03-15: for && and ||, need to do the guards also
9136 ** this is what cgrammar.y does - should be
9137 ** able to avoid duplication, but need to
9138 ** time with grammar productions.
9139 */
9140
9141 DPRINTF (("Effect: %s", exprNode_unparse (e)));
9142
9143 if (lltok_getTok (exprData_getOpTok (data)) == AND_OP)
9144 {
9145 exprNode e1 = exprNode_effect (exprData_getOpA (data));
9146 exprNode e2;
9147 exprNode_produceGuards (e1);
9148 context_enterAndClause (e1);
9149 e2 = exprNode_effect (exprData_getOpB (data));
9150
9151 ret = exprNode_op (e1, e2,
9152 exprData_getOpTok (data));
9153
9154 context_exitAndClause (ret, e2);
9155 }
9156 else if (lltok_getTok (exprData_getOpTok (data)) == OR_OP)
9157 {
9158 exprNode e1 = exprNode_effect (exprData_getOpA (data));
9159 exprNode e2;
9160 exprNode_produceGuards (e1);
9161 context_enterOrClause (e1);
9162 e2 = exprNode_effect (exprData_getOpB (data));
9163
9164 ret = exprNode_op (e1, e2,
9165 exprData_getOpTok (data));
9166
9167 context_exitOrClause (ret, e2);
9168 }
9169 else
9170 {
9171 ret = exprNode_op (exprNode_effect (exprData_getOpA (data)),
9172 exprNode_effect (exprData_getOpB (data)),
9173 exprData_getOpTok (data));
9174 }
616915dd 9175 break;
9176
9177 case XPR_POSTOP:
9178 ret = exprNode_postOp (exprNode_effect (exprData_getUopNode (data)),
9179 exprData_getUopTok (data));
9180 break;
9181 case XPR_PREOP:
9182 ret = exprNode_preOp (exprNode_effect (exprData_getUopNode (data)),
9183 exprData_getUopTok (data));
9184 break;
9185
9186 case XPR_OFFSETOF:
9187 case XPR_SIZEOFT:
9188 case XPR_SIZEOF:
9189 case XPR_ALIGNOFT:
9190 case XPR_ALIGNOF:
9191 ret = e;
9192 break;
9193
9194 case XPR_VAARG:
9195 ret = exprNode_vaArg (exprData_getCastTok (data),
9196 exprNode_effect (exprData_getCastNode (data)),
9197 exprData_getCastType (data));
9198 break;
9199
9200 case XPR_CAST:
9201 ret = exprNode_cast (exprData_getCastTok (data),
9202 exprNode_effect (exprData_getCastNode (data)),
9203 exprData_getCastType (data));
9204 break;
9205 case XPR_ITERCALL:
9206 ret = exprNode_iterStart (exprData_getIterCallIter (data),
9207 exprNodeList_effect
9208 (exprData_getIterCallArgs (data)));
9209 break;
9210
9211 case XPR_ITER:
9212 ret = exprNode_iter (exprData_getIterSname (data),
9213 exprNodeList_effect (exprData_getIterAlist (data)),
9214 exprNode_effect (exprData_getIterBody (data)),
9215 exprData_getIterEname (data));
9216 break;
9217
9218 case XPR_FOR:
9219 ret = exprNode_for (exprNode_effect (exprData_getPairA (data)),
9220 exprNode_effect (exprData_getPairB (data)));
9221 break;
9222
9223 case XPR_FORPRED:
9224 ret = exprNode_forPred (exprNode_effect (exprData_getTripleInit (data)),
9225 exprNode_effect (exprData_getTripleTest (data)),
9226 exprNode_effect (exprData_getTripleInc (data)));
9227 break;
9228
9229 case XPR_TOK:
9230 ret = exprNode_createTok (exprData_getTok (data));
9231 break;
9232
9233 case XPR_GOTO:
9234 ret = exprNode_goto (exprData_getLiteral (data));
9235 ret->loc = fileloc_update (ret->loc, e->loc);
9236 break;
9237
9238 case XPR_CONTINUE:
9239 ret = exprNode_continue (exprData_getTok (data), QSAFEBREAK);
9240 break;
9241
9242 case XPR_BREAK:
9243 ret = exprNode_break (exprData_getTok (data), QSAFEBREAK);
9244 break;
9245
9246 case XPR_RETURN:
9247 ret = exprNode_return (exprNode_effect (exprData_getSingle (data)));
9248 break;
9249
9250 case XPR_NULLRETURN:
9251 ret = exprNode_nullReturn (exprData_getTok (data));
9252 break;
9253
9254 case XPR_COMMA:
9255 ret = exprNode_comma (exprNode_effect (exprData_getPairA (data)),
9256 exprNode_effect (exprData_getPairB (data)));
9257 break;
9258
9259 case XPR_COND:
9260 ret = exprNode_cond (exprNode_effect (exprData_getTriplePred (data)),
9261 exprNode_effect (exprData_getTripleTrue (data)),
9262 exprNode_effect (exprData_getTripleFalse (data)));
9263 break;
9264 case XPR_IF:
9265 ret = exprNode_if (exprNode_effect (exprData_getPairA (data)),
9266 exprNode_effect (exprData_getPairB (data)));
9267 break;
9268
9269 case XPR_IFELSE:
9270 ret = exprNode_ifelse (exprNode_effect (exprData_getTriplePred (data)),
9271 exprNode_effect (exprData_getTripleTrue (data)),
9272 exprNode_effect (exprData_getTripleFalse (data)));
9273 break;
9274 case XPR_WHILEPRED:
9275 ret = exprNode_whilePred (exprData_getSingle (data));
9276 break;
9277
9278 case XPR_WHILE:
9279 ret = exprNode_while (exprNode_effect (exprData_getPairA (data)),
9280 exprNode_effect (exprData_getPairB (data)));
9281 break;
9282
9283 case XPR_DOWHILE:
9284 ret = exprNode_doWhile (exprNode_effect (exprData_getPairA (data)),
9285 exprNode_effect (exprData_getPairB (data)));
9286 break;
9287
9288 case XPR_BLOCK:
9289 ret = exprNode_makeBlock (exprNode_effect (exprData_getSingle (data)));
9290 break;
9291
9292 case XPR_STMT:
9293 ret = exprNode_statement (exprNode_effect (exprData_getUopNode (data)),
9294 exprData_getUopTok (data));
9295 break;
9296
9297 case XPR_STMTLIST:
9298 ret = exprNode_concat (exprNode_effect (exprData_getPairA (data)),
9299 exprNode_effect (exprData_getPairB (data)));
9300 break;
9301
9302 case XPR_FTCASE:
9303 case XPR_CASE:
9304 ret = exprNode_caseMarker
9305 (exprNode_effect (exprData_getSingle (data)),
9306 TRUE);
9307 break;
9308
9309 case XPR_FTDEFAULT:
9310 case XPR_DEFAULT:
9311 ret = exprNode_createTok (exprData_getTok (data));
9312 break;
9313
9314 case XPR_SWITCH:
9315 ret = exprNode_switch (exprNode_effect (exprData_getPairA (data)),
9316 exprNode_effect (exprData_getPairB (data)));
9317 break;
9318
9319 case XPR_INIT:
9320 ret = exprNode_makeInitialization
9321 (exprData_getInitId (data),
9322 exprNode_effect (exprData_getInitNode (data)));
9323 break;
9324
9325 case XPR_FACCESS:
28bf4b0b 9326 ret = exprNode_fieldAccessAux
9327 (exprNode_effect (exprData_getFieldNode (data)),
9328 exprNode_loc (exprData_getFieldNode (data)),
9329 cstring_copy (exprData_getFieldName (data)));
616915dd 9330 break;
9331
9332 case XPR_ARROW:
28bf4b0b 9333 ret = exprNode_arrowAccessAux
9334 (exprNode_effect (exprData_getFieldNode (data)),
9335 exprNode_loc (exprData_getFieldNode (data)),
9336 cstring_copy (exprData_getFieldName (data)));
616915dd 9337 break;
9338
9339 case XPR_STRINGLITERAL:
9340 ret = e;
9341 break;
9342
9343 case XPR_NUMLIT:
9344 ret = e;
9345 break;
9346
9347 case XPR_NODE:
9348 ret = e;
9349 break;
9350 /*@-branchstate@*/
9351 }
9352 /*@=branchstate@*/
9353 /*@=observertrans@*/
9354 /*@=exposetrans@*/
9355 /*@=dependenttrans@*/
9356 }
9357
9358 if (!innerEffect)
9359 {
9360 inEffect = FALSE;
9361 }
9362
9363 return ret;
9364}
9365
9366static /*@observer@*/ cstring exprNode_rootVarName (exprNode e)
9367{
9368 cstring ret;
9369 exprData data;
9370
9371 if (exprNode_isError (e))
9372 {
9373 return cstring_undefined;
9374 }
9375
9376 data = e->edata;
9377
9378 switch (e->kind)
9379 {
9380 case XPR_PARENS:
9381 ret = exprNode_rootVarName (exprData_getUopNode (data));
9382 break;
9383 case XPR_ASSIGN:
9384 ret = exprNode_rootVarName (exprData_getOpA (data));
9385 break;
9386 case XPR_CONST:
9387 case XPR_VAR:
9388 ret = exprData_getId (data);
9389 break;
e83c79ec 9390 case XPR_INIT:
9391 ret = idDecl_getName (exprData_getInitId (data));
9392 break;
616915dd 9393 case XPR_LABEL:
9394 case XPR_TOK:
9395 case XPR_ITERCALL:
9396 case XPR_EMPTY:
9397 case XPR_CALL:
9398 case XPR_INITBLOCK:
9399 case XPR_BODY:
9400 case XPR_FETCH:
9401 case XPR_OP:
9402 case XPR_POSTOP:
9403 case XPR_PREOP:
9404 case XPR_OFFSETOF:
9405 case XPR_ALIGNOFT:
9406 case XPR_ALIGNOF:
9407 case XPR_SIZEOFT:
9408 case XPR_SIZEOF:
9409 case XPR_VAARG:
9410 case XPR_CAST:
9411 case XPR_ITER:
9412 case XPR_FOR:
9413 case XPR_FORPRED:
9414 case XPR_BREAK:
9415 case XPR_RETURN:
9416 case XPR_NULLRETURN:
9417 case XPR_COMMA:
9418 case XPR_COND:
9419 case XPR_IF:
9420 case XPR_IFELSE:
9421 case XPR_WHILE:
9422 case XPR_WHILEPRED:
9423 case XPR_DOWHILE:
9424 case XPR_GOTO:
9425 case XPR_CONTINUE:
9426 case XPR_FTDEFAULT:
9427 case XPR_DEFAULT:
9428 case XPR_SWITCH:
9429 case XPR_FTCASE:
9430 case XPR_CASE:
9431 case XPR_BLOCK:
9432 case XPR_STMT:
9433 case XPR_STMTLIST:
616915dd 9434 case XPR_FACCESS:
9435 case XPR_ARROW:
9436 case XPR_NODE:
9437 case XPR_NUMLIT:
9438 case XPR_STRINGLITERAL:
9439 ret = cstring_undefined;
9440 break;
9441 }
9442
9443 return ret;
9444}
9445
616915dd 9446static /*@only@*/ cstring exprNode_doUnparse (exprNode e)
9447{
9448 cstring ret;
9449 exprData data;
9450
9451 if (exprNode_isError (e))
9452 {
9453 static /*@only@*/ cstring error = cstring_undefined;
9454
9455 if (!cstring_isDefined (error))
9456 {
9457 error = cstring_makeLiteral ("<error>");
9458 }
9459
9460 return error;
9461 }
9462
9463 data = e->edata;
9464
9465 switch (e->kind)
9466 {
9467 case XPR_PARENS:
9468 ret = message ("(%s)", exprNode_unparse (exprData_getUopNode (e->edata)));
9469 break;
9470 case XPR_ASSIGN:
9471 ret = message ("%s %s %s",
9472 exprNode_unparse (exprData_getOpA (data)),
9473 lltok_unparse (exprData_getOpTok (data)),
9474 exprNode_unparse (exprData_getOpB (data)));
9475 break;
9476 case XPR_CALL:
9477 ret = message ("%s(%q)",
9478 exprNode_unparse (exprData_getFcn (data)),
9479 exprNodeList_unparse (exprData_getArgs (data)));
9480 break;
9481 case XPR_INITBLOCK:
9482 ret = message ("{ %q }", exprNodeList_unparse (exprData_getArgs (data)));
9483 break;
9484 case XPR_EMPTY:
9485 ret = cstring_undefined;
9486 break;
9487 case XPR_LABEL:
9488 ret = message ("%s:", exprData_getId (data));
9489 break;
9490 case XPR_CONST:
9491 case XPR_VAR:
9492 ret = cstring_copy (exprData_getId (data));
9493 break;
9494 case XPR_FETCH:
9495 ret = message ("%s[%s]", exprNode_unparse (exprData_getPairA (data)),
9496 exprNode_unparse (exprData_getPairB (data)));
9497 break;
9498 case XPR_BODY:
9499 ret = message ("<body>");
9500 break;
9501 case XPR_OP:
9502 ret = message ("%s %s %s",
9503 exprNode_unparse (exprData_getOpA (data)),
9504 lltok_unparse (exprData_getOpTok (data)),
9505 exprNode_unparse (exprData_getOpB (data)));
9506 break;
9507
9508 case XPR_PREOP:
9509 ret = message ("%s%s",
9510 lltok_unparse (exprData_getUopTok (data)),
9511 exprNode_unparse (exprData_getUopNode (data)));
9512 break;
9513
9514 case XPR_POSTOP:
9515 ret = message ("%s%s",
9516 exprNode_unparse (exprData_getUopNode (data)),
9517 lltok_unparse (exprData_getUopTok (data)));
9518 break;
9519
9520 case XPR_OFFSETOF:
9521 ret = message ("offsetof(%s,%q)",
9522 ctype_unparse (qtype_getType (exprData_getOffsetType (data))),
9523 cstringList_unparseSep (exprData_getOffsetName (data), cstring_makeLiteralTemp (".")));
9524 break;
9525
9526 case XPR_SIZEOFT:
9527 ret = message ("sizeof(%s)", ctype_unparse (qtype_getType (exprData_getType (data))));
9528 break;
9529
9530 case XPR_SIZEOF:
9531 ret = message ("sizeof(%s)", exprNode_unparse (exprData_getSingle (data)));
9532 break;
9533
9534 case XPR_ALIGNOFT:
9535 ret = message ("alignof(%s)", ctype_unparse (qtype_getType (exprData_getType (data))));
9536 break;
9537
9538 case XPR_ALIGNOF:
9539 ret = message ("alignof(%s)", exprNode_unparse (exprData_getSingle (data)));
9540 break;
9541
9542 case XPR_VAARG:
9543 ret = message ("va_arg(%s, %q)",
9544 exprNode_unparse (exprData_getCastNode (data)),
9545 qtype_unparse (exprData_getCastType (data)));
9546 break;
9547
9548 case XPR_ITERCALL:
9549 ret = message ("%q(%q)",
9550 uentry_getName (exprData_getIterCallIter (data)),
9551 exprNodeList_unparse (exprData_getIterCallArgs (data)));
9552 break;
9553 case XPR_ITER:
9554 ret = message ("%q(%q) %s %q",
9555 uentry_getName (exprData_getIterSname (data)),
9556 exprNodeList_unparse (exprData_getIterAlist (data)),
9557 exprNode_unparse (exprData_getIterBody (data)),
9558 uentry_getName (exprData_getIterEname (data)));
9559 break;
9560 case XPR_CAST:
9561 ret = message ("(%q)%s",
9562 qtype_unparse (exprData_getCastType (data)),
9563 exprNode_unparse (exprData_getCastNode (data)));
9564 break;
9565
9566 case XPR_FOR:
9567 ret = message ("%s %s",
9568 exprNode_unparse (exprData_getPairA (data)),
9569 exprNode_unparse (exprData_getPairB (data)));
9570 break;
9571
9572 case XPR_FORPRED:
9573 ret = message ("for (%s; %s; %s)",
9574 exprNode_unparse (exprData_getTripleInit (data)),
9575 exprNode_unparse (exprData_getTripleTest (data)),
9576 exprNode_unparse (exprData_getTripleInc (data)));
9577 break;
9578
9579 case XPR_GOTO:
9580 ret = message ("goto %s", exprData_getLiteral (data));
9581 break;
9582
9583 case XPR_CONTINUE:
9584 ret = cstring_makeLiteral ("continue");
9585 break;
9586
9587 case XPR_BREAK:
9588 ret = cstring_makeLiteral ("break");
9589 break;
9590
9591 case XPR_RETURN:
9592 ret = message ("return %s", exprNode_unparse (exprData_getSingle (data)));
9593 break;
9594
9595 case XPR_NULLRETURN:
9596 ret = cstring_makeLiteral ("return");
9597 break;
9598
9599 case XPR_COMMA:
9600 ret = message ("%s, %s",
9601 exprNode_unparse (exprData_getPairA (data)),
9602 exprNode_unparse (exprData_getPairB (data)));
9603 break;
9604
9605 case XPR_COND:
9606 ret = message ("%s ? %s : %s",
9607 exprNode_unparse (exprData_getTriplePred (data)),
9608 exprNode_unparse (exprData_getTripleTrue (data)),
9609 exprNode_unparse (exprData_getTripleFalse (data)));
9610 break;
9611 case XPR_IF:
9612 ret = message ("if (%s) %s",
9613 exprNode_unparse (exprData_getPairA (data)),
9614 exprNode_unparse (exprData_getPairB (data)));
9615 break;
9616
9617 case XPR_IFELSE:
9618 ret = message ("if (%s) %s else %s",
9619 exprNode_unparse (exprData_getTriplePred (data)),
9620 exprNode_unparse (exprData_getTripleTrue (data)),
9621 exprNode_unparse (exprData_getTripleFalse (data)));
9622 break;
9623 case XPR_WHILE:
9624 ret = message ("while (%s) %s",
9625 exprNode_unparse (exprData_getPairA (data)),
9626 exprNode_unparse (exprData_getPairB (data)));
9627 break;
9628
9629 case XPR_WHILEPRED:
9630 ret = cstring_copy (exprNode_unparse (exprData_getSingle (data)));
9631 break;
9632
9633 case XPR_TOK:
9634 ret = cstring_copy (lltok_unparse (exprData_getTok (data)));
9635 break;
9636
9637 case XPR_DOWHILE:
9638 ret = message ("do { %s } while (%s)",
9639 exprNode_unparse (exprData_getPairB (data)),
9640 exprNode_unparse (exprData_getPairA (data)));
9641 break;
9642
9643 case XPR_BLOCK:
abd7f895 9644 ret = message ("{ %s }", exprNode_unparse (exprData_getSingle (data)));
9645 /* evans 2002-02-20 was unparseFirst! */
616915dd 9646 break;
9647
9648 case XPR_STMT:
abd7f895 9649 ret = message ("%s;", exprNode_unparse (exprData_getUopNode (data)));
616915dd 9650 break;
9651
9652 case XPR_STMTLIST:
abd7f895 9653 if (exprNode_isStatement (exprData_getPairA (data)))
9654 {
9655 /*
9656 ** statement expressions already print the ;
9657 */
9658
9659 ret = message ("%s %s",
9660 exprNode_unparse (exprData_getPairA (data)),
9661 exprNode_unparse (exprData_getPairB (data)));
9662 }
9663 else
9664 {
9665 ret = message ("%s; %s",
9666 exprNode_unparse (exprData_getPairA (data)),
9667 exprNode_unparse (exprData_getPairB (data)));
9668 }
616915dd 9669 break;
9670
9671 case XPR_FTDEFAULT:
9672 case XPR_DEFAULT:
9673 ret = cstring_makeLiteral ("default:");
9674 break;
9675
9676 case XPR_SWITCH:
9677 ret = message ("switch (%s) %s",
9678 exprNode_unparse (exprData_getPairA (data)),
9679 exprNode_unparse (exprData_getPairB (data)));
9680 break;
9681
9682 case XPR_FTCASE:
9683 case XPR_CASE:
9684 ret = message ("case %s:",
9685 exprNode_unparse (exprData_getSingle (data)));
9686 break;
9687
9688 case XPR_INIT:
28bf4b0b 9689 if (exprNode_isError (exprData_getInitNode (data)))
9690 {
9691 ret = message ("%q", idDecl_unparseC (exprData_getInitId (data)));
9692 }
9693 else
9694 {
9695 ret = message ("%q = %s",
9696 idDecl_unparseC (exprData_getInitId (data)),
9697 exprNode_unparse (exprData_getInitNode (data)));
9698 }
616915dd 9699 break;
9700
9701 case XPR_FACCESS:
9702 ret = message ("%s.%s",
9703 exprNode_unparse (exprData_getFieldNode (data)),
9704 exprData_getFieldName (data));
9705 break;
9706
9707 case XPR_ARROW:
9708 ret = message ("%s->%s",
9709 exprNode_unparse (exprData_getFieldNode (data)),
9710 exprData_getFieldName (data));
9711 break;
9712
9713 case XPR_STRINGLITERAL:
e0b363ad 9714 if (ctype_isWideString (e->typ))
9715 {
9716 ret = message ("L\"%s\"", exprData_getLiteral (data));
9717 }
9718 else
9719 {
9720 ret = message ("\"%s\"", exprData_getLiteral (data));
9721 }
616915dd 9722 break;
9723
9724 case XPR_NUMLIT:
9725 ret = cstring_copy (exprData_getLiteral (data));
9726 break;
9727
9728 case XPR_NODE:
9729 ret = cstring_makeLiteral ("<node>");
9730 break;
9731 }
9732
9733 return ret;
9734}
9735
28bf4b0b 9736bool
9737exprNode_isInitializer (exprNode e)
9738{
9739 return (exprNode_isDefined (e)
9740 && e->kind == XPR_INIT);
9741}
9742
616915dd 9743bool
e5081f8c 9744exprNode_isCharLiteral (exprNode e)
616915dd 9745{
9746 if (exprNode_isDefined (e))
9747 {
9748 return (multiVal_isChar (exprNode_getValue (e)));
9749 }
9750 else
9751 {
9752 return FALSE;
9753 }
9754}
9755
9756bool
e5081f8c 9757exprNode_isNumLiteral (exprNode e)
616915dd 9758{
9759 if (exprNode_isDefined (e))
9760 {
9761 return (multiVal_isInt (exprNode_getValue (e)));
9762 }
9763 else
9764 {
9765 return FALSE;
9766 }
9767}
9768
9769static bool
9770exprNode_isFalseConstant (exprNode e)
9771{
9772 if (exprNode_isDefined (e))
9773 {
9774 cstring s = exprNode_rootVarName (e);
9775
9776 if (cstring_equal (s, context_getFalseName ()))
9777 {
9778 return TRUE;
9779 }
9780 }
9781
9782 return FALSE;
9783}
9784
9785bool
9786exprNode_matchLiteral (ctype expected, exprNode e)
9787{
9788 if (exprNode_isDefined (e))
9789 {
9790 multiVal m = exprNode_getValue (e);
9791
9792 if (multiVal_isDefined (m))
9793 {
9794 if (multiVal_isInt (m))
9795 {
9796 long int val = multiVal_forceInt (m);
9797
e5081f8c 9798 if (ctype_isNumAbstract (expected)
9799 && context_flagOn (FLG_NUMABSTRACTLIT, exprNode_loc (e)))
9800 {
9801 return TRUE;
9802 }
9803
616915dd 9804 if (ctype_isDirectBool (ctype_realishType (expected)))
9805 {
9806 if (val == 0)
9807 {
9808 return FALSE; /* really?! return TRUE; allow use of 0 for FALSE */
9809 }
9810 else
9811 {
9812 return FALSE;
9813 }
9814 }
9815
9816 if (ctype_isRealInt (expected))
9817 {
9818 /*
9819 ** unsigned <- [ constant >= 0 is okay ]
9820 */
9821
9822 if (ctype_isUnsigned (expected))
9823 {
9824 if (val < 0)
9825 {
9826 return FALSE;
9827 }
9828 }
9829
9830 /*
9831 ** No checks on sizes of integers...maybe add
9832 ** these later.
9833 */
9834
9835 DPRINTF (("Here: %s => %s", exprNode_unparse (e), ctype_unparse (expected)));
9836 DPRINTF (("Type: %s / %s", ctype_unparse (exprNode_getType (e)),
9837 bool_unparse (ctype_isInt (exprNode_getType (e)))));
9838
9839 if (context_getFlag (FLG_NUMLITERAL)
9840 && (ctype_isRegularInt (exprNode_getType (e)) || val == 0)) {
9841 return TRUE;
9842 } else {
9843 if (val == 0) {
9844 return TRUE;
9845 } else {
9846 return FALSE; /* evs 2000-05-17: previously, always returned TRUE */
9847 }
9848 }
9849 }
9850 else if (ctype_isChar (expected))
9851 {
9852 return FALSE;
9853 }
9854 else if (ctype_isArrayPtr (expected))
9855 {
8fe44445 9856 /*
9857 ** evans 2001-10-14: We allow 0 to match any pointer, but only if the type matches or is void *.
9858 */
9859
9860 if (val == 0)
9861 {
9862 if (ctype_match (exprNode_getType (e), expected)
9863 || ctype_isVoidPointer (exprNode_getType (e)))
9864 {
9865 return TRUE;
9866 }
9867 }
9868 else
9869 {
9870 return FALSE;
9871 }
616915dd 9872 }
9873 else if (ctype_isAnyFloat (expected))
9874 {
9875 return (context_getFlag (FLG_NUMLITERAL));
9876 }
9877 else
9878 {
9879 return FALSE;
9880 }
9881 }
9882 else if (multiVal_isDouble (m))
9883 {
9884 if (ctype_isAnyFloat (expected))
9885 {
9886 return TRUE;
9887 }
9888 }
9889 else if (multiVal_isChar (m))
9890 {
9891 char val = multiVal_forceChar (m);
9892
9893 if (ctype_isChar (expected))
9894 {
9895 if (ctype_isUnsigned (expected) && ((int)val) < 0)
9896 {
9897 return FALSE;
9898 }
9899 else
9900 {
9901 return TRUE;
9902 }
9903 }
9904 }
9905 else
9906 {
9907 return FALSE;
9908 }
9909 }
9910 }
9911
9912 return FALSE;
9913}
9914
9915bool
9916exprNode_matchType (ctype expected, exprNode e)
9917{
9918 ctype actual;
9919
9920 if (!exprNode_isDefined (e)) return TRUE;
9921
9922 actual = ctype_realishType (exprNode_getType (e));
9923
9924 if (ctype_match (ctype_realishType (expected), actual))
9925 {
9926 return TRUE;
9927 }
9928
9929 llassert (!exprNode_isError (e));
9930 return (exprNode_matchLiteral (expected, e));
9931}
9932
9933static bool
9934exprNode_matchTypes (exprNode e1, exprNode e2)
9935{
9936 ctype t1;
9937 ctype t2;
9938
9939 if (!exprNode_isDefined (e1)) return TRUE;
9940 if (!exprNode_isDefined (e2)) return TRUE;
9941
9942 /*
9943 ** realish type --- keep bools, bools
9944 */
9945
9946 t1 = ctype_realishType (exprNode_getType (e1));
9947 t2 = ctype_realishType (exprNode_getType (e2));
9948
9949 if (ctype_match (t1, t2))
9950 {
9951 return TRUE;
9952 }
9953
8fe44445 9954 DPRINTF (("Matching literal! %s %s %s %s",
9955 ctype_unparse (t1), exprNode_unparse (e2),
9956 ctype_unparse (t2), exprNode_unparse (e1)));
9957
616915dd 9958 return (exprNode_matchLiteral (t1, e2) || exprNode_matchLiteral (t2, e1));
9959}
9960
9961/*
9962** pass e as ct
9963*/
9964
9965static bool
9966 exprNode_matchArgType (ctype ct, exprNode e)
9967{
9968 ctype et;
9969
9970 if (!exprNode_isDefined (e))
9971 {
9972 return TRUE;
9973 }
9974
9975 et = ctype_realType (exprNode_getType (e));
9976
9977 if (ctype_matchArg (ct, et)) return TRUE;
9978
9979 llassert (!exprNode_isError (e));
9980 return (exprNode_matchLiteral (ct, e));
9981}
9982
9983static /*@only@*/ exprNodeSList
9984 exprNode_flatten (/*@dependent@*/ exprNode e) /*@*/
9985{
9986 if (exprNode_isDefined (e))
9987 {
9988 if (e->kind == XPR_STMTLIST)
9989 {
9990 return (exprNodeSList_append
9991 (exprNode_flatten (exprData_getPairA (e->edata)),
9992 exprNode_flatten (exprData_getPairB (e->edata))));
9993 }
9994 else if (e->kind == XPR_BLOCK)
9995 {
9996 return (exprNode_flatten (exprData_getSingle (e->edata)));
9997 }
9998 else
9999 {
10000 return (exprNodeSList_singleton (e));
10001 }
10002 }
10003
10004 return exprNodeSList_new ();
10005}
10006
10007static /*@exposed@*/ exprNode
10008exprNode_lastStatement (/*@returned@*/ exprNode e)
10009{
10010 if (exprNode_isDefined (e))
10011 {
10012 if (e->kind == XPR_STMTLIST)
10013 {
10014 exprNode b = exprData_getPairB (e->edata);
10015
10016 if (exprNode_isDefined (b))
10017 {
10018 return exprNode_lastStatement (b);
10019 }
10020 else
10021 {
10022 return exprNode_lastStatement (exprData_getPairA (e->edata));
10023 }
10024 }
10025 else if (e->kind == XPR_BLOCK)
10026 {
10027 return (exprNode_lastStatement (exprData_getSingle (e->edata)));
10028 }
10029 else
10030 {
10031 return (e);
10032 }
10033 }
10034
10035 return exprNode_undefined;
10036}
10037
10038static /*@exposed@*/ exprNode
10039exprNode_firstStatement (/*@returned@*/ exprNode e)
10040{
10041 if (exprNode_isDefined (e))
10042 {
10043 if (e->kind == XPR_STMTLIST)
10044 {
10045 exprNode b = exprData_getPairA (e->edata);
10046
10047 if (exprNode_isDefined (b))
10048 {
10049 return exprNode_firstStatement (b);
10050 }
10051 else
10052 {
10053 return exprNode_firstStatement (exprData_getPairB (e->edata));
10054 }
10055 }
10056 else if (e->kind == XPR_BLOCK)
10057 {
10058 return (exprNode_firstStatement (exprData_getSingle (e->edata)));
10059 }
10060 else
10061 {
10062 return (e);
10063 }
10064 }
10065
10066 return exprNode_undefined;
10067}
10068
10069static void
10070exprNode_mergeUSs (exprNode res, exprNode other)
10071{
10072 if (exprNode_isDefined (res) && exprNode_isDefined (other))
10073 {
10074 res->msets = sRefSet_union (res->msets, other->msets);
10075 res->sets = sRefSet_union (res->sets, other->sets);
10076 res->uses = sRefSet_union (res->uses, other->uses);
10077 }
10078}
10079
10080static void
10081exprNode_mergeCondUSs (exprNode res, exprNode other1, exprNode other2)
10082{
10083 if (exprNode_isDefined (res))
10084 {
10085 if (exprNode_isDefined (other1))
10086 {
10087 res->sets = sRefSet_union (res->sets, other1->sets);
10088 res->msets = sRefSet_union (res->msets, other1->msets);
10089 res->uses = sRefSet_union (res->uses, other1->uses);
10090 }
10091 if (exprNode_isDefined (other2))
10092 {
10093 res->sets = sRefSet_union (res->sets, other2->sets);
10094 res->msets = sRefSet_union (res->msets, other2->msets);
10095 res->uses = sRefSet_union (res->uses, other2->uses);
10096 }
10097 }
10098}
10099
10100/*
10101** modifies e->uses
10102**
10103** Reports errors is s is not defined.
10104*/
10105
10106static void
28bf4b0b 10107exprNode_addUse (exprNode e, /*@exposed@*/ sRef s)
616915dd 10108{
10109 if (exprNode_isDefined (e))
10110 {
10111 e->uses = sRefSet_insert (e->uses, s);
10112 }
10113}
10114
10115void
28bf4b0b 10116exprNode_checkUse (exprNode e, /*@exposed@*/ sRef s, fileloc loc)
616915dd 10117{
10118 if (sRef_isKnown (s) && !sRef_isConst (s))
10119 {
10120 /*
10121 ** need to check all outer types are useable
10122 */
10123
10124 DPRINTF (("Check use: %s / %s",
10125 exprNode_unparse (e), sRef_unparse (s)));
28bf4b0b 10126
616915dd 10127 exprNode_addUse (e, s);
10128
10129 if (!context_inProtectVars ())
10130 {
10131 /*
10132 ** only report the deepest error
10133 */
10134
10135 sRef errorRef = sRef_undefined;
10136 sRef lastRef = sRef_undefined;
10137 bool deadRef = FALSE;
10138 bool unuseable = FALSE;
10139 bool errorMaybe = FALSE;
10140
10141 while (sRef_isValid (s) && sRef_isKnown (s))
10142 {
3e3ec469 10143 ynm readable = sRef_isValidLvalue (s);
616915dd 10144
28bf4b0b 10145 DPRINTF (("Readable: %s / %s",
10146 sRef_unparseFull (s), ynm_unparse (readable)));
10147
616915dd 10148 if (!(ynm_toBoolStrict (readable)))
10149 {
10150 if (ynm_isMaybe (readable))
10151 {
10152 lastRef = errorRef;
10153 errorRef = s;
cd7d9b17 10154 DPRINTF (("Setting ERROR: %s", sRef_unparseFull (s)));
616915dd 10155 deadRef = sRef_isPossiblyDead (errorRef);
10156 unuseable = sRef_isUnuseable (errorRef);
10157 errorMaybe = TRUE;
10158 }
10159 else
10160 {
10161 lastRef = errorRef;
10162 errorRef = s;
16c024b5 10163 DPRINTF (("Setting ERROR: %s", sRef_unparseFull (s)));
616915dd 10164 deadRef = sRef_isDead (errorRef);
10165 unuseable = sRef_isUnuseable (errorRef);
10166 errorMaybe = FALSE;
10167 }
10168
16c024b5 10169 /*
616915dd 10170 if (!sRef_isPartial (s))
10171 {
cd7d9b17 10172 DPRINTF (("Defining! %s", sRef_unparseFull (s)));
16c024b5 10173 sRef_setDefined (s, loc);
10174 DPRINTF (("Defining! %s", sRef_unparseFull (s)));
616915dd 10175 }
16c024b5 10176 */
616915dd 10177 }
10178
10179 s = sRef_getBaseSafe (s);
10180 } /* end while */
10181
10182 if (sRef_isValid (errorRef))
10183 {
10184 if (sRef_isValid (lastRef) && sRef_isField (lastRef)
10185 && sRef_isPointer (errorRef))
10186 {
10187 errorRef = lastRef;
16c024b5 10188 DPRINTF (("errorRef: %s", sRef_unparseFull (errorRef)));
616915dd 10189 }
10190
10191 if (deadRef)
10192 {
10193 if (sRef_isThroughArrayFetch (errorRef))
10194 {
10195 if (optgenerror
10196 (FLG_STRICTUSERELEASED,
10197 message ("%q %q may be used after being released",
10198 sRef_unparseKindNamePlain (errorRef),
10199 sRef_unparse (errorRef)),
10200 loc))
10201 {
10202 sRef_showRefKilled (errorRef);
10203
10204 if (sRef_isKept (errorRef))
10205 {
10206 sRef_clearAliasState (errorRef, loc);
10207 }
10208 }
10209 }
10210 else
10211 {
16c024b5 10212 DPRINTF (("HERE: %s", sRef_unparseFull (errorRef)));
616915dd 10213
10214 if (optgenerror
10215 (FLG_USERELEASED,
10216 message ("%q %q %qused after being released",
10217 sRef_unparseKindNamePlain (errorRef),
10218 sRef_unparse (errorRef),
10219 cstring_makeLiteral (errorMaybe
10220 ? "may be " : "")),
10221 loc))
10222 {
10223 sRef_showRefKilled (errorRef);
10224
10225 if (sRef_isKept (errorRef))
10226 {
10227 sRef_clearAliasState (errorRef, loc);
10228 }
10229 }
10230 }
10231 }
10232 else if (unuseable)
10233 {
10234 if (optgenerror
10235 (FLG_USEDEF,
10236 message ("%q %q%qused in inconsistent state",
10237 sRef_unparseKindName (errorRef),
10238 sRef_unparseOpt (errorRef),
10239 cstring_makeLiteral (errorMaybe ? "may be " : "")),
10240 loc))
10241 {
10242 sRef_showStateInconsistent (errorRef);
10243 }
10244 }
10245 else
10246 {
28bf4b0b 10247 DPRINTF (("HERE: %s", sRef_unparseFull (errorRef)));
616915dd 10248
16c024b5 10249 if (optgenerror
10250 (FLG_USEDEF,
10251 message ("%q %q%qused before definition",
10252 sRef_unparseKindName (errorRef),
10253 sRef_unparseOpt (errorRef),
10254 cstring_makeLiteral (errorMaybe ? "may be " : "")),
10255 loc))
10256 {
10257 ;
10258 }
cd7d9b17 10259
10260 DPRINTF (("Error: %s", sRef_unparseFull (errorRef)));
616915dd 10261 }
10262
10263 sRef_setDefined (errorRef, loc);
10264
10265 if (sRef_isAddress (errorRef))
10266 {
10267 sRef_setDefined (sRef_getRootBase (errorRef), loc);
10268 }
10269 } /* end is error */
10270 }
10271 }
10272
10273 setCodePoint ();
10274}
10275
10276static void
28bf4b0b 10277checkSafeUse (exprNode e, /*@exposed@*/ sRef s)
616915dd 10278{
10279 if (exprNode_isDefined (e) && sRef_isKnown (s))
10280 {
10281 e->uses = sRefSet_insert (e->uses, s);
10282 }
10283}
10284
10285static void
10286exprNode_checkSetAny (exprNode e, /*@dependent@*/ cstring name)
10287{
10288 if (exprNode_isDefined (e))
10289 {
10290 e->sets = sRefSet_insert (e->sets, sRef_makeUnconstrained (name));
10291 }
10292}
10293
10294void
28bf4b0b 10295exprNode_checkSet (exprNode e, /*@exposed@*/ sRef s)
616915dd 10296{
10297 sRef defines = sRef_undefined;
10298
10299 if (sRef_isValid (s) && !sRef_isNothing (s))
10300 {
10301 uentry ue = sRef_getBaseUentry (s);
10302
10303 if (uentry_isValid (ue))
10304 {
10305 uentry_setLset (ue);
10306 }
10307
10308 if (!ynm_toBoolStrict (sRef_isWriteable (s)))
10309 {
10310 voptgenerror (FLG_USEDEF,
10311 message ("Attempt to set unuseable storage: %q",
10312 sRef_unparse (s)),
10313 exprNode_loc (e));
10314 }
10315
10316 if (sRef_isMeaningful (s))
1d239d69 10317 {
616915dd 10318 if (sRef_isDead (s))
10319 {
10320 sRef base = sRef_getBaseSafe (s);
10321
10322 if (sRef_isValid (base)
10323 && sRef_isDead (base))
10324 {
10325 sRef_setPartial (s, exprNode_loc (e));
10326 }
10327
10328 defines = s; /* okay - modifies for only param */
10329 }
10330 else if (sRef_isPartial (s))
10331 {
10332 sRef eref = exprNode_getSref (e);
10333
10334 if (!sRef_isPartial (eref))
10335 {
10336 /*
10337 ** should do something different here???
10338 */
10339
10340 sRef_setDefinedComplete (eref, exprNode_loc (e));
10341 }
10342 else
10343 {
10344 sRef_setPartialDefinedComplete (eref, exprNode_loc (e));
10345 }
10346
10347 if (sRef_isMeaningful (eref))
10348 {
10349 defines = eref;
10350 }
10351 else
10352 {
10353 defines = s;
10354 }
10355 }
10356 else if (sRef_isAllocated (s))
10357 {
10358 sRef eref = exprNode_getSref (e);
10359
10360
10361 if (!sRef_isAllocated (eref))
10362 {
10363 sRef_setDefinedComplete (eref, exprNode_loc (e));
10364 }
10365 else
10366 {
10367 sRef base = sRef_getBaseSafe (eref);
10368
10369 if (sRef_isValid (base))
10370 {
10371 sRef_setPdefined (base, exprNode_loc (e));
10372 }
10373 }
10374
10375 defines = s;
10376 }
10377 else
10378 {
10379 sRef_setDefinedNCComplete (s, exprNode_loc (e));
10380 defines = s;
10381 }
10382
10383 }
10384 else /* not meaningful...but still need to insert it */
10385 {
10386 defines = s;
10387 }
10388 }
10389
10390 if (exprNode_isDefined (e) && sRef_isValid (defines))
10391 {
10392 e->sets = sRefSet_insert (e->sets, defines);
10393 }
10394}
10395
10396void
28bf4b0b 10397exprNode_checkMSet (exprNode e, /*@exposed@*/ sRef s)
616915dd 10398{
10399 if (sRef_isValid (s) && !sRef_isNothing (s))
10400 {
10401 uentry ue = sRef_getBaseUentry (s);
10402
10403 if (uentry_isValid (ue))
10404 {
10405 uentry_setLset (ue);
10406 }
10407
10408 if (!ynm_toBoolStrict (sRef_isWriteable (s)))
10409 {
10410 voptgenerror (FLG_USEDEF,
10411 message ("Attempt to set unuseable storage: %q", sRef_unparse (s)),
10412 exprNode_loc (e));
10413 }
10414
10415 if (sRef_isMeaningful (s))
10416 {
10417 sRef_setDefinedComplete (s, exprNode_loc (e));
10418 }
10419
10420 if (exprNode_isDefined (e))
10421 {
10422 e->msets = sRefSet_insert (e->msets, s);
10423 }
10424 }
10425}
10426
10427static void
10428checkUnspecCall (/*@notnull@*/ /*@dependent@*/ exprNode fcn, uentryList params, exprNodeList args)
10429{
10430 checkAnyCall (fcn, cstring_undefined, params, args,
10431 FALSE, sRefSet_undefined, FALSE, 0);
10432}
10433
10434static void
10435checkOneArg (uentry ucurrent, /*@notnull@*/ exprNode current,
10436 /*@dependent@*/ exprNode fcn, bool isSpec, int argno, int totargs)
10437{
10438 setCodePoint ();
10439
10440 if (uentry_isYield (ucurrent))
10441 {
10442 sRef_setDefined (exprNode_getSref (current), exprNode_loc (current));
10443 exprNode_checkSet (current, current->sref);
10444 }
10445 else
10446 {
10447 if (uentry_isSefParam (ucurrent))
10448 {
10449 sRefSet sets = current->sets;
10450 sRef ref = exprNode_getSref (current);
10451
10452 if (sRef_isMacroParamRef (ref))
10453 {
10454 uentry ue = sRef_getUentry (ref);
10455
10456 if (!uentry_isSefParam (ue))
10457 {
10458 voptgenerror
10459 (FLG_SEFPARAMS,
10460 message
10461 ("Parameter %d to %s is declared sef, but "
10462 "the argument is a macro parameter declared "
10463 "without sef: %s",
10464 argno, exprNode_unparse (fcn),
10465 exprNode_unparse (current)),
10466 exprNode_loc (current));
10467 }
10468 }
10469
10470 if (!sRefSet_isEmpty (sets))
10471 {
10472 sRefSet reported = sRefSet_undefined;
10473
10474 sRefSet_realElements (current->sets, el)
10475 {
10476 if (sRefSet_isSameNameMember (reported, el))
10477 {
10478 ; /* don't report again */
10479 }
10480 else
10481 {
10482 if (sRef_isUnconstrained (el))
10483 {
10484 voptgenerror
10485 (FLG_SEFUNSPEC,
10486 message
10487 ("Parameter %d to %s is declared sef, but "
10488 "the argument calls unconstrained function %s "
10489 "(no guarantee it will not modify something): %s",
10490 argno, exprNode_unparse (fcn),
10491 sRef_unconstrainedName (el),
10492 exprNode_unparse (current)),
10493 exprNode_loc (current));
10494 }
10495 else
10496 {
10497 voptgenerror
10498 (FLG_SEFPARAMS,
10499 message
10500 ("Parameter %d to %s is declared sef, but "
10501 "the argument may modify %q: %s",
10502 argno, exprNode_unparse (fcn),
10503 sRef_unparse (el),
10504 exprNode_unparse (current)),
10505 exprNode_loc (current));
10506 }
10507 }
10508 } end_sRefSet_realElements;
10509 }
10510 }
10511
2e127cb8 10512 transferChecks_passParam (current, ucurrent, isSpec, fcn, argno, totargs);
616915dd 10513 exprNode_mergeUSs (fcn, current);
10514 }
10515}
10516
10517static void
10518 checkAnyCall (/*@dependent@*/ exprNode fcn,
10519 /*@dependent@*/ cstring fname,
10520 uentryList pn,
10521 exprNodeList args,
10522 bool hasMods, sRefSet mods,
10523 bool isSpec,
10524 int specialArgs)
10525{
10526 int paramno = 0;
10527 int nargs = exprNodeList_size (args);
10528
10529 setCodePoint ();
10530
10531 /*
10532 ** concat all args ud's to f, add each arg sref as a use unless
10533 ** it was specified as "out", in which case it is a def.
10534 */
10535
10536 uentryList_reset (pn);
10537
10538 /*
10539 ** aliasing checks:
10540 **
10541 ** if paramn is only or unique, no other arg may alias argn
10542 */
10543
10544 exprNodeList_elements (args, current)
10545 {
10546 paramno++;
10547
10548 if (exprNode_isDefined (current))
10549 {
10550 if ((!uentryList_isUndefined (pn) && !uentryList_isFinished (pn)))
10551 {
10552 uentry ucurrent = uentryList_current (pn);
10553
10554 if (specialArgs == 0
10555 || (paramno < specialArgs))
10556 {
28bf4b0b 10557 checkOneArg (ucurrent, current, fcn, isSpec, paramno, nargs);
616915dd 10558
10559 if (context_maybeSet (FLG_ALIASUNIQUE))
10560 {
10561 if (uentry_isOnly (ucurrent)
10562 || uentry_isUnique (ucurrent))
10563 {
10564 checkUniqueParams (fcn, current, args,
10565 paramno, ucurrent);
10566 }
10567 }
10568 }
10569 }
10570 else /* uentry is undefined */
10571 {
10572 if (specialArgs == 0)
10573 {
10574 exprNode_checkUseParam (current);
10575 }
10576
10577 exprNode_mergeUSs (fcn, current);
10578 }
10579 }
10580 uentryList_advanceSafe (pn);
10581 } end_exprNodeList_elements;
10582
10583 if (hasMods)
10584 {
10585 setCodePoint ();
10586
10587 sRefSet_allElements (mods, s)
10588 {
10589 sRef fb;
10590 sRef rb = sRef_getRootBase (s);
10591
28bf4b0b 10592 if (sRef_isFileOrGlobalScope (rb))
616915dd 10593 {
10594 context_usedGlobal (rb);
10595 }
10596
10597 fb = sRef_fixBaseParam (s, args);
10598
10599 if (!sRef_isMacroParamRef (fb))
10600 {
10601 if (sRef_isNothing (fb))
10602 {
10603 ;
10604 }
10605 else
10606 {
10607 if (sRef_isValid (fb))
10608 {
10609 uentry ue = sRef_getBaseUentry (s);
10610
10611 if (uentry_isValid (ue))
10612 {
10613 uentry_setLset (ue);
10614 }
10615 }
10616
10617 fcn->sets = sRefSet_insert (fcn->sets, fb);
10618 }
10619 }
10620 sRef_clearDerivedComplete (s);
10621 } end_sRefSet_allElements;
10622
10623 setCodePoint ();
10624 }
10625 else
10626 {
10627 if (context_hasMods ())
10628 {
10629 if (context_maybeSet (FLG_MODUNCON))
10630 {
10631 voptgenerror
10632 (FLG_MODUNCON,
10633 message ("Undetected modification possible "
10634 "from call to unconstrained function %s: %s",
10635 fname,
10636 exprNode_unparse (fcn)),
10637 exprNode_loc (fcn));
10638 }
10639 }
10640 else
10641 {
10642 if (context_maybeSet (FLG_MODUNCONNOMODS)
10643 && !(context_inIterDef () || context_inIterEnd ()))
10644 {
10645 voptgenerror
10646 (FLG_MODUNCONNOMODS,
10647 message ("Undetected modification possible "
10648 "from call to unconstrained function %s: %s",
10649 fname,
10650 exprNode_unparse (fcn)),
10651 exprNode_loc (fcn));
10652 }
10653 }
10654
10655 exprNode_checkSetAny (fcn, fname);
10656 }
10657}
10658
10659void exprNode_checkUseParam (exprNode current)
10660{
10661 if (exprNode_isDefined (current))
10662 {
10663 exprNode_checkUse (current, current->sref, current->loc);
10664 }
10665}
10666
10667static ctype
10668 checkNumerics (ctype tr1, ctype tr2, ctype te1, ctype te2,
10669 /*@notnull@*/ exprNode e1, /*@notnull@*/ exprNode e2,
10670 lltok op)
10671{
10672 ctype ret = tr1;
10673
10674 if (!ctype_match (tr1, tr2))
10675 {
10676 if ((ctype_isRealInt (tr1) || ctype_isReal (tr1)) &&
10677 (ctype_isRealInt (tr2) || ctype_isReal (tr2)))
10678 {
8fe44445 10679 DPRINTF (("No error: [%s] %s / [%s] %s",
10680 exprNode_unparse (e1), ctype_unparse (tr1),
10681 exprNode_unparse (e2), ctype_unparse (tr2)));
e5081f8c 10682
10683 ret = ctype_biggerType (tr1, tr2);
616915dd 10684 }
10685 else
10686 {
e5081f8c 10687 if (ctype_isNumAbstract (tr1)
10688 && exprNode_isNumLiteral (e2)
10689 && context_flagOn (FLG_NUMABSTRACTLIT, e1->loc))
10690 {
10691 ret = tr1; /* No error */
10692 }
10693 else if (ctype_isNumAbstract (tr2)
10694 && exprNode_isNumLiteral (e1)
10695 && context_flagOn (FLG_NUMABSTRACTLIT, e1->loc))
10696 {
10697 ret = tr2;
10698 }
10699 else
10700 {
10701 if (gentypeerror
10702 (tr1, e1, tr2, e2,
10703 message ("Incompatible types for %s (%s, %s): %s %s %s",
10704 lltok_unparse (op),
10705 ctype_unparse (te1),
10706 ctype_unparse (te2),
10707 exprNode_unparse (e1), lltok_unparse (op),
10708 exprNode_unparse (e2)),
10709 e1->loc))
10710 {
10711 ret = ctype_unknown;
10712 }
10713 else
10714 {
10715 ret = ctype_biggerType (tr1, tr2);
10716 }
10717 }
616915dd 10718 }
616915dd 10719 }
10720 else
10721 {
e5081f8c 10722 if (ctype_isNumAbstract (tr1))
10723 {
10724 ret = tr1;
10725 }
10726 else if (ctype_isForceRealNumeric (&tr1)
10727 && ctype_isForceRealNumeric (&tr2))
616915dd 10728 {
10729 ret = ctype_resolveNumerics (tr1, tr2);
10730 }
10731 else if (!context_msgStrictOps ())
10732 {
e5081f8c 10733 if (ctype_isPointer (tr1))
616915dd 10734 {
10735 if (ctype_isPointer (tr2) && !exprNode_isNullValue (e2))
10736 {
10737 ret = ctype_int;
10738 }
10739 else if (ctype_isInt (tr2))
10740 {
10741 ret = te1;
10742 }
10743 else
10744 {
10745 ret = ctype_unknown;
10746 }
10747 }
10748 else if (ctype_isPointer (tr2))
10749 {
10750 if (ctype_isPointer (tr1))
10751 {
10752 ret = ctype_int;
10753 }
10754 else if (ctype_isInt (tr1))
10755 {
10756 ret = te2;
10757 }
10758 else
10759 {
10760 ret = ctype_unknown;
10761 }
10762 }
10763 else
10764 {
10765 ret = ctype_resolveNumerics (tr1, tr2);
10766 }
10767 }
10768 else
10769 {
10770 int opid = lltok_getTok (op);
10771 bool comparop = (opid == EQ_OP || opid == NE_OP
10772 || opid == TLT || opid == TGT
10773 || opid == LE_OP || opid == GE_OP);
10774
10775 if (!ctype_isNumeric (tr1) && !ctype_isNumeric (tr2))
10776 {
10777 if (comparop
10778 && ((ctype_isEnum (tr1) && ctype_isEnum (tr2))
10779 || (ctype_isBool (tr1) && ctype_isBool (tr2))
10780 || (ctype_isChar (tr1) && ctype_isChar (tr2))))
10781 {
10782 ; /* no error */
10783 }
10784 else
10785 {
10786 if (ctype_sameName (te1, te2))
10787 {
10788 voptgenerror
10789 (FLG_STRICTOPS,
10790 message ("Operands of %s are non-numeric (%t): %s %s %s",
10791 lltok_unparse (op), te1,
10792 exprNode_unparse (e1), lltok_unparse (op),
10793 exprNode_unparse (e2)),
10794 e1->loc);
10795 }
10796 else
10797 {
10798 voptgenerror
10799 (FLG_STRICTOPS,
10800 message ("Operands of %s are non-numerics (%t, %t): %s %s %s",
10801 lltok_unparse (op), te1, te2,
10802 exprNode_unparse (e1), lltok_unparse (op),
10803 exprNode_unparse (e2)),
10804 e1->loc);
10805 }
10806 }
10807 }
10808 else if (!ctype_isNumeric (tr1))
10809 {
10810 voptgenerror
10811 (FLG_STRICTOPS,
10812 message ("Right operand of %s is non-numeric (%t): %s %s %s",
10813 lltok_unparse (op), te1,
10814 exprNode_unparse (e1), lltok_unparse (op),
10815 exprNode_unparse (e2)),
10816 e1->loc);
10817 }
10818 else
10819 {
10820 if (!ctype_isNumeric (tr2))
10821 {
10822 voptgenerror
10823 (FLG_STRICTOPS,
10824 message ("Left operand of %s is non-numeric (%t): %s %s %s",
10825 lltok_unparse (op), te2,
10826 exprNode_unparse (e1), lltok_unparse (op),
10827 exprNode_unparse (e2)),
10828 e2->loc);
10829 }
10830 }
10831
10832 ret = ctype_unknown;
10833 }
10834 }
10835
10836 return ret;
10837}
10838
e5081f8c 10839static bool
616915dd 10840abstractOpError (ctype tr1, ctype tr2, lltok op,
10841 /*@notnull@*/ exprNode e1, /*@notnull@*/ exprNode e2,
10842 fileloc loc1, fileloc loc2)
10843{
10844 if (ctype_isRealAbstract (tr1) && ctype_isRealAbstract (tr2))
10845 {
10846 if (ctype_match (tr1, tr2))
10847 {
e5081f8c 10848 if (ctype_isRealNumAbstract (tr1))
10849 {
10850 ; /* No warning for numabstract types */
10851 }
10852 else
10853 {
16c024b5 10854 if (lltok_isEqOp (op) || lltok_isNotEqOp (op))
10855 {
10856 return optgenerror
10857 (FLG_ABSTRACTCOMPARE,
10858 message ("Object equality comparison (%s) on objects of abstract type (%t): %s %s %s",
10859 lltok_unparse (op), tr1,
10860 exprNode_unparse (e1), lltok_unparse (op), exprNode_unparse (e2)),
10861 loc1);
10862 }
10863 else
10864 {
10865 return optgenerror
10866 (FLG_ABSTRACT,
10867 message ("Operands of %s are abstract type (%t): %s %s %s",
10868 lltok_unparse (op), tr1,
10869 exprNode_unparse (e1), lltok_unparse (op), exprNode_unparse (e2)),
10870 loc1);
10871 }
e5081f8c 10872 }
616915dd 10873 }
10874 else
10875 {
e5081f8c 10876 if (ctype_isRealNumAbstract (tr1) && ctype_isRealNumAbstract (tr2))
10877 {
10878 return optgenerror
10879 (FLG_NUMABSTRACT,
10880 message
10881 ("Operands of %s are different numabstract types (%t, %t): %s %s %s",
10882 lltok_unparse (op), tr1, tr2,
10883 exprNode_unparse (e1),
10884 lltok_unparse (op), exprNode_unparse (e2)),
10885 loc1);
10886 }
10887 else
10888 {
10889 return optgenerror
10890 (FLG_ABSTRACT,
10891 message ("Operands of %s are abstract types (%t, %t): %s %s %s",
10892 lltok_unparse (op), tr1, tr2,
10893 exprNode_unparse (e1), lltok_unparse (op),
10894 exprNode_unparse (e2)),
10895 loc1);
10896 }
616915dd 10897 }
10898 }
e5081f8c 10899 else if (ctype_isRealAbstract (tr1) && !ctype_isRealNumAbstract (tr1))
616915dd 10900 {
e5081f8c 10901 return optgenerror
616915dd 10902 (FLG_ABSTRACT,
10903 message ("Left operand of %s is abstract type (%t): %s %s %s",
10904 lltok_unparse (op), tr1,
10905 exprNode_unparse (e1), lltok_unparse (op), exprNode_unparse (e2)),
10906 loc1);
10907 }
10908 else
10909 {
e5081f8c 10910 if (ctype_isRealAbstract (tr2) && !ctype_isRealNumAbstract (tr2))
616915dd 10911 {
e5081f8c 10912 return optgenerror
616915dd 10913 (FLG_ABSTRACT,
10914 message ("Right operand of %s is abstract type (%t): %s %s %s",
10915 lltok_unparse (op), tr2,
10916 exprNode_unparse (e1), lltok_unparse (op), exprNode_unparse (e2)),
10917 loc2);
10918 }
10919 }
e5081f8c 10920
10921 return FALSE;
616915dd 10922}
10923
10924/*
10925** e1 <= e2
10926**
10927** requies e1 and e2 and not error exprNode's.
10928**
10929** Checks:
10930**
10931** If e1 is a component of an abstract type, and e2 is mutable and client-visible,
10932** the rep of the abstract type is exposed.
10933**
10934** The order is very important:
10935**
10936** check rep expose (move into check transfer)
10937** check transfer
10938** setup aliases
10939*/
10940
10941/*
10942** This isn't really a sensible procedure, but the indententation
10943** was getting too deep.
10944*/
10945
10946static void
10947checkOneRepExpose (sRef ysr, sRef base,
10948 /*@notnull@*/ exprNode e1,
10949 /*@notnull@*/ exprNode e2, ctype ct,
10950 sRef s2b)
10951{
10952 if (!(sRef_isOnly (ysr) || sRef_isKeep (ysr)
08eb3d0e 10953 || sRef_isOwned (ysr)
10954 || sRef_isExposed (ysr)))
616915dd 10955 {
08eb3d0e 10956 if (sRef_isAnyParam (base) && !sRef_isExposed (base)
10957 && !sRef_isObserver (base)) /* evans 2001-07-11: added isObserver */
10958
616915dd 10959 {
10960 if (sRef_isIReference (ysr))
10961 {
10962 if (sRef_sameName (base, sRef_getRootBase (e2->sref)))
10963 {
10964 voptgenerror
10965 (FLG_ASSIGNEXPOSE,
10966 message
10967 ("Assignment of mutable component of parameter %q "
10968 "to component of abstract "
10969 "type %s exposes rep: %s = %s",
10970 sRef_unparse (base),
10971 ctype_unparse (ct),
10972 exprNode_unparse (e1), exprNode_unparse (e2)),
10973 e1->loc);
10974 }
10975 else
10976 {
10977 voptgenerror
10978 (FLG_ASSIGNEXPOSE,
10979 message
10980 ("Assignment of mutable component of parameter %q "
10981 "(through alias %q) to component of abstract "
10982 "type %s exposes rep: %s = %s",
10983 sRef_unparse (base),
10984 sRef_unparse (e2->sref),
10985 ctype_unparse (ct),
10986 exprNode_unparse (e1), exprNode_unparse (e2)),
10987 e1->loc);
10988 }
10989 }
10990 else
10991 {
10992 if (sRef_sameName (base, sRef_getRootBase (e2->sref)))
10993 {
10994 voptgenerror
10995 (FLG_ASSIGNEXPOSE,
10996 message ("Assignment of mutable parameter %q "
10997 "to component of abstract type %s "
10998 "exposes rep: %s = %s",
10999 sRef_unparse (base),
11000 ctype_unparse (ct),
11001 exprNode_unparse (e1),
11002 exprNode_unparse (e2)),
11003 e1->loc);
11004 }
11005 else
11006 {
11007 voptgenerror
11008 (FLG_ASSIGNEXPOSE,
11009 message ("Assignment of mutable parameter %q "
11010 "(through alias %q) to "
11011 "component of abstract type %s exposes "
11012 "rep: %s = %s",
11013 sRef_unparse (base),
11014 sRef_unparse (e2->sref),
11015 ctype_unparse (ct),
11016 exprNode_unparse (e1),
11017 exprNode_unparse (e2)),
11018 e1->loc);
11019 }
11020 }
11021 }
11022
28bf4b0b 11023 if (sRef_isFileOrGlobalScope (s2b))
616915dd 11024 {
11025 if (sRef_sameName (base, sRef_getRootBase (e2->sref)))
11026 {
11027 voptgenerror
11028 (FLG_REPEXPOSE,
11029 message ("Assignment of global %q "
11030 "to component of "
11031 "abstract type %s exposes rep: %s = %s",
11032 sRef_unparse (base),
11033 ctype_unparse (ct),
11034 exprNode_unparse (e1), exprNode_unparse (e2)),
11035 e1->loc);
11036 }
11037 else
11038 {
11039 voptgenerror
11040 (FLG_REPEXPOSE,
11041 message ("Assignment of global %q (through alias %q) "
11042 "to component of "
11043 "abstract type %s exposes rep: %s = %s",
11044 sRef_unparse (base),
11045 sRef_unparse (e2->sref),
11046 ctype_unparse (ct),
11047 exprNode_unparse (e1), exprNode_unparse (e2)),
11048 e1->loc);
11049 }
11050 }
11051 }
11052}
11053
11054static void
11055doAssign (/*@notnull@*/ exprNode e1, /*@notnull@*/ exprNode e2, bool isInit)
11056{
7534721d 11057 DPRINTF (("Do assign: %s <- %s",
11058 exprNode_unparse (e1), exprNode_unparse (e2)));
11059 DPRINTF (("Ctype: %s", ctype_unparse (exprNode_getType (e1))));
11060
616915dd 11061 if (ctype_isRealFunction (exprNode_getType (e1))
11062 && !ctype_isRealPointer (exprNode_getType (e1)))
11063 {
11064 voptgenerror
11065 (FLG_TYPE,
11066 message ("Invalid left-hand side of assignment (function type %s): %s",
11067 ctype_unparse (exprNode_getType (e1)),
11068 exprNode_unparse (e1)),
11069 e1->loc);
11070 }
11071
11072 if (context_getFlag (FLG_ASSIGNEXPOSE) && ctype_isMutable (e2->typ))
11073 {
11074 ctype t2 = exprNode_getType (e2);
11075 sRef sr = sRef_getRootBase (e1->sref);
11076 ctype ct = sRef_getType (sr);
11077
11078 if (ctype_isAbstract (t2)
b73d1009 11079 && !ctype_isNumAbstract (t2)
616915dd 11080 && !(uentry_isMutableDatatype (usymtab_getTypeEntry (ctype_typeId (t2)))))
11081 {
11082 /* it is immutable, okay to reference */
11083 goto donerepexpose;
11084 }
11085
11086 if (ctype_isAbstract (ct) && sRef_isIReference (e1->sref))
11087 {
11088 sRef s2b = sRef_getRootBase (e2->sref);
11089 sRef s1 = e1->sref;
11090 sRef s1b = sRef_getRootBase (s1);
11091 sRefSet aliases;
11092
11093 aliases = usymtab_canAlias (e2->sref);
11094
11095 if (!sRef_similar (s2b, s1b)
11096 && !sRef_isExposed (s1)
11097 && !(sRef_isOnly (s2b) || sRef_isKeep (s2b) || sRef_isExposed (s2b)))
11098 {
11099 if (sRef_isAnyParam (s2b) && !sRef_isOnly (s2b)
11100 && !sRef_isOwned (s2b) && !sRef_isKeep (s2b)
11101 && !sRef_isExposed (s2b))
11102 {
11103 if (sRef_isIReference (e2->sref))
11104 {
11105 voptgenerror
11106 (FLG_ASSIGNEXPOSE,
11107 message
11108 ("Assignment of mutable component of parameter %q "
11109 "to component of abstract type %s exposes rep: %s = %s",
11110 sRef_unparse (s2b),
11111 ctype_unparse (ct),
11112 exprNode_unparse (e1), exprNode_unparse (e2)),
11113 e1->loc);
11114 }
11115 else
11116 {
11117 voptgenerror
11118 (FLG_ASSIGNEXPOSE,
11119 message ("Assignment of mutable parameter %q to "
11120 "component of abstract type %s exposes rep: %s = %s",
11121 sRef_unparse (s2b),
11122 ctype_unparse (ct),
11123 exprNode_unparse (e1), exprNode_unparse (e2)),
11124 e1->loc);
11125 }
11126 }
11127
28bf4b0b 11128 if (sRef_isFileOrGlobalScope (s2b))
616915dd 11129 {
11130 voptgenerror
11131 (FLG_ASSIGNEXPOSE,
11132 message ("Assignment of global %q to component of "
11133 "abstract type %s exposes rep: %s = %s",
11134 sRef_unparse (s2b),
11135 ctype_unparse (ct),
11136 exprNode_unparse (e1), exprNode_unparse (e2)),
11137 e1->loc);
11138 }
11139
11140 sRefSet_realElements (aliases, ysr)
11141 {
11142 sRef base = sRef_getRootBase (ysr);
11143
11144 if (sRef_similar (ysr, s2b) || sRef_similar (s1b, base)
11145 || sRef_sameName (base, s1b))
11146 {
11147 ; /* error already reported or same sref */
11148 }
11149 else
11150 {
11151 checkOneRepExpose (ysr, base, e1, e2, ct, s2b);
11152 }
11153 } end_sRefSet_realElements;
11154 }
11155 sRefSet_free (aliases);
11156 }
11157 }
11158
11159 donerepexpose:
11160
11161 /*
11162 ** function variables don't really work...
11163 */
11164
11165 if (!ctype_isFunction (ctype_realType (e2->typ)))
11166 {
11167 if (isInit)
11168 {
28bf4b0b 11169 DPRINTF (("Check init: %s / %s",
11170 exprNode_unparse (e1), exprNode_unparse (e2)));
2e127cb8 11171 transferChecks_initialization (e1, e2);
616915dd 11172 }
11173 else
11174 {
2e127cb8 11175 transferChecks_assign (e1, e2);
616915dd 11176 }
11177 }
11178 else
11179 {
11180 sRef fref = e2->sref;
11181
11182 sRef_setDefState (e1->sref, sRef_getDefState (fref), e1->loc);
11183 sRef_setNullState (e1->sref, sRef_getNullState (fref), e1->loc);
11184
11185 /* Need to typecheck the annotation on the parameters */
11186
11187 if (ctype_isRealFunction (e1->typ)) {
11188 uentryList e1p = ctype_argsFunction (ctype_realType (e1->typ));
11189 uentryList e2p = ctype_argsFunction (ctype_realType (e2->typ));
11190
11191 if (!uentryList_isMissingParams (e1p)
11192 && !uentryList_isMissingParams (e2p)
11193 && uentryList_size (e1p) > 0) {
11194 if (uentryList_size (e1p) == uentryList_size (e2p)) {
11195 int n = 0;
11196
11197 uentryList_elements (e1p, el1) {
11198 uentry el2;
11199
11200 el2 = uentryList_getN (e2p, n);
11201 n++;
11202 uentry_checkMatchParam (el1, el2, n, e2);
11203 } end_uentryList_elements;
11204 }
11205 }
11206 }
11207 }
11208
7534721d 11209 if (exprNode_isStringLiteral (e2))
11210 {
11211 exprNode_checkStringLiteralLength (exprNode_getType (e1), e2);
11212 }
11213
28bf4b0b 11214 if (isInit && sRef_isFileOrGlobalScope (e1->sref))
616915dd 11215 {
11216 ;
11217 }
11218 else
11219 {
28bf4b0b 11220 DPRINTF (("Update aliases: %s / %s", exprNode_unparse (e1), exprNode_unparse (e2)));
616915dd 11221 updateAliases (e1, e2);
11222 }
616915dd 11223}
11224
11225static void
11226checkMacroParen (exprNode e)
11227{
11228 if (exprNode_isError (e) || e->kind == XPR_CAST)
11229 {
11230 ;
11231 }
11232 else
11233 {
11234 if (sRef_isUnsafe (e->sref) && !exprNode_isInParens (e))
11235 {
11236 voptgenerror
11237 (FLG_MACROPARENS,
11238 message ("Macro parameter used without parentheses: %s",
11239 exprNode_unparse (e)),
11240 e->loc);
11241 }
11242 }
11243}
11244
11245static void
11246reflectNullTest (/*@notnull@*/ exprNode e, bool isnull)
11247{
11248 if (isnull)
11249 {
11250 e->guards = guardSet_addTrueGuard (e->guards, e->sref);
11251 }
11252 else
11253 {
11254 e->guards = guardSet_addFalseGuard (e->guards, e->sref);
11255 }
11256}
11257
11258/*
11259** e1 <= e2
11260**
11261** if e2 is a parameter or global derived location which
11262** can be modified (that is, e2 is a mutable abstract type,
11263** or a derived pointer), then e1 can alias e2.
11264**
11265** e1 can alias everything which e2 can alias.
11266**
11267** Also, if e1 is guarded, remove from guard sets!
11268*/
11269
11270static void updateAliases (/*@notnull@*/ exprNode e1, /*@notnull@*/ exprNode e2)
11271{
11272 if (!context_inProtectVars ())
11273 {
11274 /*
11275 ** depends on types of e1 and e2
11276 */
11277
11278 sRef s1 = e1->sref;
11279 sRef s2 = e2->sref;
11280 ctype t1 = exprNode_getType (e1);
11281
11282 /* handle pointer sRefs, record fields, arrays, etc... */
11283
11284 if (!ctype_isRealSU (t1))
11285 {
28bf4b0b 11286 DPRINTF (("Copying real! %s", ctype_unparse (t1)));
616915dd 11287 sRef_copyRealDerivedComplete (s1, s2);
11288 }
28bf4b0b 11289 else
11290 {
11291 /*
11292 ** Fields should alias
11293 */
11294
11295 DPRINTF (("Not COPYING!: %s", ctype_unparse (t1)));
11296 }
616915dd 11297
11298 if (ctype_isMutable (t1) && sRef_isKnown (s1))
11299 {
11300 usymtab_clearAlias (s1);
11301 usymtab_addMustAlias (s1, s2);
28bf4b0b 11302 DPRINTF (("Add must alias: %s / %s", sRef_unparse (s1), sRef_unparse (s2)));
11303 }
11304 else
11305 {
11306 DPRINTF (("Not mutable: %s", ctype_unparse (t1)));
616915dd 11307 }
11308
11309 if (sRef_possiblyNull (s1) && usymtab_isGuarded (s1))
11310 {
11311 usymtab_unguard (s1);
11312 }
11313 }
11314}
11315
11316exprNode exprNode_updateLocation (/*@returned@*/ exprNode e, /*@temp@*/ fileloc loc)
11317{
11318 if (exprNode_isDefined (e))
11319 {
11320 e->loc = fileloc_update (e->loc, loc);
11321 }
11322 else
11323 {
11324 e = exprNode_createLoc (ctype_unknown, fileloc_copy (loc));
11325 }
11326
11327 return (e);
11328}
11329
11330static void checkUniqueParams (exprNode fcn,
11331 /*@notnull@*/ exprNode current,
11332 exprNodeList args,
11333 int paramno, uentry ucurrent)
11334{
11335 int iparamno = 0;
11336 sRef thisref = exprNode_getSref (current);
11337
11338 /*
11339 ** Check if any argument could match this argument.
11340 */
11341
11342 exprNodeList_elements (args, icurrent)
11343 {
11344 iparamno++;
11345
11346 if (iparamno != paramno)
11347 {
11348 sRef sr = exprNode_getSref (icurrent);
11349
11350 if (sRef_similarRelaxed (thisref, sr))
11351 {
11352 if (!sRef_isConst (thisref) && !sRef_isConst (sr))
11353 {
11354 voptgenerror
11355 (FLG_ALIASUNIQUE,
11356 message
11357 ("Parameter %d (%s) to function %s is declared %s but "
11358 "is aliased by parameter %d (%s)",
11359 paramno,
11360 exprNode_unparse (current),
11361 exprNode_unparse (fcn),
11362 alkind_unparse (uentry_getAliasKind (ucurrent)),
11363 iparamno, exprNode_unparse (icurrent)),
11364 current->loc);
11365 }
11366 }
11367 else
11368 {
11369 sRefSet aliases = usymtab_canAlias (sr);
11370
11371 sRefSet_allElements (aliases, asr)
11372 {
11373 if (ctype_isUnknown (sRef_getType (thisref)))
11374 {
11375 sRef_setType (thisref, uentry_getType (ucurrent));
11376 }
11377
11378 if (sRef_similarRelaxed (thisref, asr))
11379 {
11380 if (sRef_isExternal (asr))
11381 {
11382 if (sRef_isLocalState (thisref))
11383 {
11384 ; /* okay */
11385 }
11386 else
11387 {
11388 sRef base = sRef_getRootBase (asr);
11389
11390 if (!sRef_similar (sRef_getBase (asr), thisref))
11391 {
11392 if (sRef_isUnique (base) || sRef_isOnly (base)
11393 || sRef_isKept (base)
11394 || (sRef_isAddress (asr) && sRef_isLocalVar (base))
11395 || (sRef_isAddress (thisref)
11396 && sRef_isLocalVar (sRef_getRootBase (thisref))))
11397 {
11398 ; /* okay, no error */
11399 }
11400 else
11401 {
11402 voptgenerror
11403 (FLG_MAYALIASUNIQUE,
11404 message
11405 ("Parameter %d (%s) to function %s is declared %s but "
11406 "may be aliased externally by parameter %d (%s)",
11407 paramno,
11408 exprNode_unparse (current),
11409 exprNode_unparse (fcn),
11410 alkind_unparse (uentry_getAliasKind (ucurrent)),
11411 iparamno, exprNode_unparse (icurrent)),
11412 current->loc);
11413 }
11414 }
11415 }
11416 }
11417 else
11418 {
11419 voptgenerror
11420 (FLG_ALIASUNIQUE,
11421 message
11422 ("Parameter %d (%s) to function %s is declared %s but "
11423 "is aliased externally by parameter %d (%s) through "
11424 "alias %q",
11425 paramno,
11426 exprNode_unparse (current),
11427 exprNode_unparse (fcn),
11428 alkind_unparse (uentry_getAliasKind (ucurrent)),
11429 iparamno, exprNode_unparse (icurrent),
11430 sRef_unparse (asr)),
11431 current->loc);
11432 }
11433 }
11434 } end_sRefSet_allElements;
11435 sRefSet_free (aliases);
11436 }
11437 }
11438 } end_exprNodeList_elements;
11439}
11440
11441long exprNode_getLongValue (exprNode e) {
11442 long value;
11443
11444 if (exprNode_hasValue (e)
11445 && multiVal_isInt (exprNode_getValue (e)))
11446 {
11447 value = multiVal_forceInt (exprNode_getValue (e));
11448 }
11449 else
11450 {
7534721d 11451 /*@!! BADBRANCH;*/
616915dd 11452 value = 0;
11453 }
11454
11455 return value;
11456}
11457
d46ce6a4 11458/*@observer@*/ fileloc exprNode_getfileloc (exprNode p_e)
616915dd 11459{
84c9ffbf 11460 if (exprNode_isDefined (p_e) )
d46ce6a4 11461 return ( p_e->loc );
616915dd 11462 else
11463 return fileloc_undefined;
11464}
11465
bb25bea6 11466/*@only@*/ fileloc exprNode_getNextSequencePoint (exprNode e)
616915dd 11467{
11468 /*
11469 ** Returns the location of the sequence point following e.
11470 **
11471 ** Only works for statements (for now).
11472 */
11473
11474 if (exprNode_isDefined (e) && e->kind == XPR_STMT) {
11475 lltok t = exprData_getUopTok (e->edata);
bb25bea6 11476 return fileloc_copy(lltok_getLoc (t));
616915dd 11477 } else {
b7b694d6 11478 /* drl possible problem : warning fix
11479 llcontbug (message ("Cannot get next sequence point: %s", exprNode_unparse (e)));
11480 */
616915dd 11481 return fileloc_undefined;
11482 }
11483 }
11484
9280addf 11485exprNode exprNode_createNew(ctype c)
11486{
11487 exprNode ret;
11488
11489 ret = exprNode_createPlain (c);
11490
11491 return ret;
11492}
d30bc0c7 11493
11494bool exprNode_isInitBlock (exprNode e)
11495{
11496 return (exprNode_isDefined(e) && e->kind == XPR_INITBLOCK);
11497}
72704d73 11498
11499/*drl 3/2/2003 moved this function out of constraint.c */
11500exprNode exprNode_copyConstraints (/*@returned@*/ exprNode dst, exprNode src)
11501{
11502
11503 llassert (exprNode_isDefined (dst) );
11504 llassert (exprNode_isDefined (src) );
11505
11506 constraintList_free (dst->ensuresConstraints);
11507 constraintList_free (dst->requiresConstraints);
11508 constraintList_free (dst->trueEnsuresConstraints);
11509 constraintList_free (dst->falseEnsuresConstraints);
11510
11511 dst->ensuresConstraints = constraintList_copy (src->ensuresConstraints);
11512 dst->requiresConstraints = constraintList_copy (src->requiresConstraints);
11513 dst->trueEnsuresConstraints = constraintList_copy (src->trueEnsuresConstraints);
11514 dst->falseEnsuresConstraints = constraintList_copy (src->falseEnsuresConstraints);
11515 return dst;
11516}
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