2 ** Splint - annotation-assisted static program checker
3 ** Copyright (C) 1994-2003 University of Virginia,
4 ** Massachusetts Institute of Technology
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.
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.
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.
20 ** For information on splint: info@splint.org
21 ** To report a bug: splint-bug@splint.org
22 ** For more information: http://www.splint.org
28 # include <ctype.h> /* for isdigit */
29 # include "splintMacros.nf"
31 # include "cgrammar.h"
32 # include "cscanner.h"
33 # include "cscannerHelp.h"
34 # include "cgrammar_tokens.h"
36 # include "exprChecks.h"
37 # include "transferChecks.h"
38 # include "exprNodeSList.h"
40 static bool exprNode_sameStorage (exprNode p_e1, exprNode p_e2) /*@*/ ;
41 static bool exprNode_isEmptyStatement (exprNode p_e);
42 static /*@exposed@*/ exprNode exprNode_firstStatement (/*@returned@*/ exprNode p_e);
43 static bool exprNode_isFalseConstant (exprNode p_e) /*@*/ ;
44 static bool exprNode_isStatement (exprNode p_e);
45 static void checkGlobUse (uentry p_glob, bool p_isCall, /*@notnull@*/ exprNode p_e);
46 static void exprNode_addUse (exprNode p_e, /*@exposed@*/ sRef p_s);
47 static bool exprNode_matchArgType (ctype p_ct, exprNode p_e);
48 static exprNode exprNode_fakeCopy (exprNode p_e) /*@*/ ;
49 static exprNode exprNode_statementError (/*@only@*/ exprNode p_e, /*@only@*/ lltok p_t);
50 static bool exprNode_matchTypes (exprNode p_e1, exprNode p_e2);
51 static void checkUniqueParams (exprNode p_fcn,
52 /*@notnull@*/ exprNode p_current, exprNodeList p_args,
53 int p_paramno, uentry p_ucurrent);
54 static void updateAliases (/*@notnull@*/ exprNode p_e1, /*@notnull@*/ exprNode p_e2);
55 static bool abstractOpError (ctype p_tr1, ctype p_tr2, lltok p_op,
56 /*@notnull@*/ exprNode p_e1, /*@notnull@*/ exprNode p_e2,
57 fileloc p_loc1, fileloc p_loc2)
58 /*@modifies g_warningstream@*/ ;
59 static ctype checkNumerics (ctype p_tr1, ctype p_tr2, ctype p_te1, ctype p_te2,
60 /*@notnull@*/ exprNode p_e1, /*@notnull@*/ exprNode p_e2, lltok p_op);
61 static void doAssign (/*@notnull@*/ exprNode p_e1, /*@notnull@*/ exprNode p_e2, bool p_isInit);
62 static void checkSafeUse (exprNode p_e, /*@exposed@*/ sRef p_s);
63 static void reflectNullTest (/*@notnull@*/ exprNode p_e, bool p_isnull);
64 static void checkMacroParen (exprNode p_e);
65 static exprNodeSList exprNode_flatten (/*@dependent@*/ exprNode p_e);
66 static void exprNode_checkSetAny (exprNode p_e, /*@dependent@*/ cstring p_name);
67 static void exprNode_checkUse (exprNode p_e, /*@exposed@*/ sRef p_s, fileloc p_loc);
68 static void exprNode_mergeUSs (exprNode p_res, exprNode p_other);
69 static void exprNode_mergeCondUSs (exprNode p_res, exprNode p_other1, exprNode p_other2);
70 static /*@only@*/ /*@notnull@*/ exprNode exprNode_fromIdentifierAux (/*@observer@*/ uentry p_c);
71 static void checkAnyCall (/*@notnull@*/ /*@dependent@*/ exprNode p_fcn,
72 /*@dependent@*/ cstring p_fname,
73 uentryList p_pn, exprNodeList p_args,
74 bool p_hasMods, sRefSet p_mods, bool p_isSpec,
76 static void checkOneArg (uentry p_ucurrent, /*@notnull@*/ exprNode p_current,
77 /*@dependent@*/ exprNode p_fcn, bool p_isSpec, int p_argno, int p_totargs);
79 checkUnspecCall (/*@notnull@*/ /*@dependent@*/ exprNode p_fcn, uentryList p_params, exprNodeList p_args);
81 static /*@only@*/ exprNode exprNode_effect (exprNode p_e)
82 /*@globals internalState@*/ ;
83 static /*@only@*/ cstring exprNode_doUnparse (exprNode p_e);
84 static /*@observer@*/ cstring exprNode_rootVarName (exprNode p_e);
85 static /*@exposed@*/ exprNode
86 exprNode_lastStatement (/*@returned@*/ exprNode p_e);
88 static /*@only@*/ exprNode s_mustExitNode = exprNode_undefined;
90 static int checkArgsReal (uentry p_fcn, /*@dependent@*/ exprNode p_f,
92 exprNodeList p_args, bool p_isIter, exprNode p_ret);
94 static bool inEffect = FALSE;
95 static int nowalloc = 0;
96 static int totalloc = 0;
97 static int maxalloc = 0;
99 static /*@only@*/ uentry regArg;
100 static /*@only@*/ uentry outArg;
101 static /*@only@*/ uentry outStringArg;
102 static /*@exposed@*/ sRef stdinRef;
103 static /*@exposed@*/ sRef stdoutRef;
104 static /*@only@*/ uentry csArg;
105 static /*@only@*/ uentry csOnlyArg;
106 static ctype cstringType;
107 static ctype ctypeType;
108 static ctype filelocType;
109 static bool initMod = FALSE;
111 /*@function void exprNode_swap (sef exprNode, sef exprNode)@*/
113 # define exprNode_swap(e1,e2) do { exprNode m_tmp = (e1); (e1) = (e2); (e2) = m_tmp; } while (FALSE)
116 static void exprNode_defineConstraints(/*@sef@*/ /*@special@*/ /*@notnull@*/ exprNode e)
117 /*@defines e->requiresConstraints, e->ensuresConstraints,
118 e->trueEnsuresConstraints, e->falseEnsuresConstraints @*/
120 e->requiresConstraints = constraintList_makeNew ();
121 e->ensuresConstraints = constraintList_makeNew ();
122 e->trueEnsuresConstraints = constraintList_makeNew ();
123 e->falseEnsuresConstraints = constraintList_makeNew ();
127 ** must occur after library has been read
130 void exprNode_initMod (void)
131 /*@globals undef regArg, undef outArg, undef outStringArg,
132 undef csOnlyArg, undef csArg;
139 cstringType = ctype_unknown;
140 ctypeType = ctype_unknown;
141 filelocType = ctype_unknown;
143 if (usymtab_existsType (cstring_makeLiteralTemp ("cstring")))
145 cstringType = usymtab_lookupAbstractType (cstring_makeLiteralTemp ("cstring"));
148 if (usymtab_existsType (cstring_makeLiteralTemp ("ctype")))
150 ctypeType = usymtab_lookupAbstractType (cstring_makeLiteralTemp ("ctype"));
153 if (usymtab_existsType (cstring_makeLiteralTemp ("fileloc")))
155 filelocType = usymtab_lookupAbstractType (cstring_makeLiteralTemp ("fileloc"));
158 if (usymtab_existsGlob (cstring_makeLiteralTemp ("stdin")))
160 ue = usymtab_lookupGlob (cstring_makeLiteralTemp ("stdin"));
162 else /* define stdin */
164 ue = uentry_makeVariable (cstring_makeLiteralTemp ("stdin"),
166 fileloc_getBuiltin (),
168 uentry_setHasNameError (ue);
169 ue = usymtab_supGlobalEntryReturn (ue);
172 stdinRef = sRef_makePointer (uentry_getSref (ue));
174 if (usymtab_existsGlob (cstring_makeLiteralTemp ("stdout")))
176 ue = usymtab_lookupGlob (cstring_makeLiteralTemp ("stdout"));
180 ue = uentry_makeVariable (cstring_makeLiteralTemp ("stdout"),
182 fileloc_getBuiltin (),
184 uentry_setHasNameError (ue);
185 ue = usymtab_supGlobalEntryReturn (ue);
188 stdoutRef = sRef_makePointer (uentry_getSref (ue));
190 tmp = idDecl_create (cstring_undefined, qtype_create (ctype_unknown));
192 regArg = uentry_makeParam (tmp, PARAMUNKNOWN);
195 qtype_addQual (qtype_create (ctype_makePointer (ctype_unknown)),
198 outArg = uentry_makeParam (tmp, PARAMUNKNOWN);
200 idDecl_setTyp (tmp, qtype_addQual (qtype_create (ctype_string),
203 outStringArg = uentry_makeParam (tmp, PARAMUNKNOWN);
205 idDecl_setTyp (tmp, qtype_addQual (qtype_addQual (qtype_create (cstringType),
207 qual_createNull ()));
209 csOnlyArg = uentry_makeParam (tmp, PARAMUNKNOWN);
211 idDecl_setTyp (tmp, qtype_addQual (qtype_create (cstringType), qual_createNull ()));
212 csArg = uentry_makeParam (tmp, PARAMUNKNOWN);
218 exprNode_destroyMod (void)
219 /*@globals killed regArg, killed outArg, killed outStringArg,
220 killed s_mustExitNode, initMod @*/
224 /* evans 2002-07-12: changed uentry_free to uentry_freeComplete */
225 uentry_freeComplete (regArg);
226 uentry_freeComplete (outArg);
227 uentry_freeComplete (outStringArg);
229 exprNode_free (s_mustExitNode);
236 static void exprNode_resetSref (/*@notnull@*/ exprNode e)
238 e->sref = sRef_undefined;
241 exprNode exprNode_fakeCopy (exprNode e)
243 /*@-temptrans@*/ /*@-retalias@*/
245 /*@=temptrans@*/ /*@=retalias@*/
248 static bool isFlagKey (char key)
250 return (key == '-' || key == '+' || key == ' ' || key == '#');
253 static void exprNode_combineControl (/*@notnull@*/ exprNode ret,
254 /*@notnull@*/ exprNode ifclause,
255 /*@notnull@*/ exprNode elseclause)
257 ret->canBreak = ifclause->canBreak || elseclause->canBreak;
260 (ifclause->mustBreak || exprNode_mustEscape (ifclause))
261 && (elseclause->mustBreak || exprNode_mustEscape (elseclause));
263 ret->exitCode = exitkind_combine (ifclause->exitCode,
264 elseclause->exitCode);
269 ** For exprNode's returned by exprNode_effect.
272 static bool shallowKind (exprKind kind)
274 return (kind == XPR_STRINGLITERAL
275 || kind == XPR_NUMLIT
278 || kind == XPR_NODE);
282 exprNode_freeIniter (/*@only@*/ exprNode e)
284 if (!exprNode_isError (e))
290 ** Its a fake copy, don't free the field->rec and field->field
295 sfree (e->edata->field);
301 exprNode_free (e->edata->op->b);
302 /*@-compdestroy@*/ sfree (e->edata->op); /*@=compdestroy@*/
306 llbug (message ("other: %s", exprNode_unparse (e)));
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);
317 constraintList_free(e->requiresConstraints);
318 constraintList_free(e->ensuresConstraints);
319 constraintList_free(e->trueEnsuresConstraints);
320 constraintList_free(e->falseEnsuresConstraints);
322 e->requiresConstraints = NULL;
323 e->ensuresConstraints = NULL;
324 e->trueEnsuresConstraints = NULL;
325 e->falseEnsuresConstraints = NULL;
332 exprNode_freeShallow (/*@only@*/ exprNode e)
334 if (!exprNode_isError (e))
336 if (shallowKind (e->kind))
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)
354 /* don't free anything */
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);
367 /*@-compdestroy@*/ sfree (e); /*@=compdestroy@*/
376 exprNode_free (exprNode e)
378 if (!exprNode_isError (e))
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);
391 constraintList_free(e->requiresConstraints);
392 constraintList_free(e->ensuresConstraints);
393 constraintList_free(e->trueEnsuresConstraints);
394 constraintList_free(e->falseEnsuresConstraints);
396 e->requiresConstraints = NULL;
397 e->ensuresConstraints = NULL;
398 e->trueEnsuresConstraints = NULL;
399 e->falseEnsuresConstraints = NULL;
409 exprNode_makeError ()
411 return exprNode_undefined;
414 static /*@out@*/ /*@only@*/ /*@notnull@*/ exprNode
417 exprNode ret = (exprNode) dmalloc (sizeof (*ret));
418 /* static int lastexpnodes = 0; */
423 if (nowalloc > maxalloc)
431 static /*@notnull@*/ /*@special@*/ exprNode
432 exprNode_createPlain (ctype c)
434 /*@ensures isnull result->edata, result->loc, result->val, result->guards,
435 result->uses, result->sets, result->msets, result->etext @*/
438 exprNode e = exprNode_new ();
442 e->val = multiVal_undefined;
443 e->sref = sRef_undefined;
444 e->etext = cstring_undefined;
445 e->loc = fileloc_undefined;
446 e->guards = guardSet_undefined;
447 e->uses = sRefSet_undefined;
448 e->sets = sRefSet_undefined;
449 e->msets = sRefSet_undefined;
450 e->edata = exprData_undefined;
451 e->exitCode = XK_NEVERESCAPE;
453 e->mustBreak = FALSE;
454 e->isJumpPoint = FALSE;
456 exprNode_defineConstraints(e);
461 /*@observer@*/ exprNode exprNode_makeMustExit (void)
463 if (exprNode_isUndefined (s_mustExitNode))
465 s_mustExitNode = exprNode_createPlain (ctype_unknown);
466 s_mustExitNode->exitCode = XK_MUSTEXIT;
469 return s_mustExitNode;
473 static /*@notnull@*/ /*@special@*/ exprNode exprNode_create (ctype c)
475 /*@post:isnull result->edata, result->guards, result->val,
476 result->uses, result->sets, result->msets@*/
479 exprNode e = exprNode_createPlain (c);
480 e->loc = fileloc_copy (g_currentloc);
484 static /*@notnull@*/ /*@special@*/ exprNode exprNode_createUnknown (void)
486 /*@post:isnull result->edata, result->guards,
487 result->uses, result->sets, result->msets@*/
490 return (exprNode_create (ctype_unknown));
493 static /*@notnull@*/ /*@special@*/ exprNode
494 exprNode_createLoc (ctype c, /*@keep@*/ fileloc loc)
496 /*@post:isnull result->edata, result->guards, result->val,
497 result->uses, result->sets, result->msets@*/
500 exprNode e = exprNode_createPlain (c);
506 exprNode_copySets (/*@special@*/ /*@notnull@*/ exprNode ret, exprNode e)
507 /*@defines ret->guards, ret->uses, ret->sets, ret->msets@*/
509 if (exprNode_isDefined (e))
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);
518 ret->guards = guardSet_undefined;
519 ret->uses = sRefSet_undefined;
520 ret->sets = sRefSet_undefined;
521 ret->msets = sRefSet_undefined;
525 static /*@notnull@*/ /*@special@*/ exprNode
526 exprNode_createPartialLocCopy (exprNode e, /*@only@*/ fileloc loc)
528 /*@post:isnull result->edata, result->etext@*/
531 exprNode ret = exprNode_new ();
533 if (exprNode_isError (e))
535 ret->typ = ctype_unknown;
536 ret->val = multiVal_undefined;
538 ret->guards = guardSet_undefined;
539 ret->uses = sRefSet_undefined;
540 ret->sets = sRefSet_undefined;
541 ret->msets = sRefSet_undefined;
546 ret->val = multiVal_copy (e->val);
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);
554 ret->kind = XPR_EMPTY;
555 ret->sref = sRef_undefined;
556 ret->etext = cstring_undefined;
557 ret->exitCode = XK_NEVERESCAPE;
558 ret->canBreak = FALSE;
559 ret->mustBreak = FALSE;
560 ret->isJumpPoint = FALSE;
561 ret->edata = exprData_undefined;
563 exprNode_defineConstraints(ret);
569 static /*@notnull@*/ /*@special@*/ exprNode
570 exprNode_createPartialCopy (exprNode e)
572 /*@post:isnull result->edata, result->etext@*/
575 return (exprNode_createPartialLocCopy (e, fileloc_copy (exprNode_loc (e))));
578 static /*@notnull@*/ /*@special@*/ exprNode
579 exprNode_createPartialNVCopy (exprNode e)
581 /*@post:isnull result->edata, result->etext, result->val @*/
584 exprNode ret = exprNode_new ();
586 if (exprNode_isError (e))
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;
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);
605 ret->val = multiVal_undefined;
606 ret->kind = XPR_EMPTY;
607 ret->sref = sRef_undefined;
608 ret->etext = cstring_undefined;
609 ret->exitCode = XK_NEVERESCAPE;
610 ret->canBreak = FALSE;
611 ret->mustBreak = FALSE;
612 ret->isJumpPoint = FALSE;
613 ret->edata = exprData_undefined;
615 exprNode_defineConstraints(ret);
620 static /*@notnull@*/ /*@special@*/ exprNode
621 exprNode_createSemiCopy (exprNode e)
623 /*@post:isnull result->edata, result->etext, result->sets,
624 result->msets, result->uses, result->guards@*/
627 if (exprNode_isError (e))
629 return exprNode_createPlain (ctype_unknown);
633 exprNode ret = exprNode_new ();
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;
643 ret->kind = XPR_EMPTY;
644 ret->sref = sRef_undefined;
645 ret->etext = cstring_undefined;
646 ret->exitCode = XK_NEVERESCAPE;
647 ret->canBreak = FALSE;
648 ret->mustBreak = FALSE;
649 ret->isJumpPoint = FALSE;
650 ret->edata = exprData_undefined;
652 exprNode_defineConstraints(ret);
659 exprNode_isNullValue (exprNode e)
661 if (exprNode_isDefined (e))
663 multiVal m = exprNode_getValue (e);
665 if (multiVal_isInt (m))
667 return (multiVal_forceInt (m) == 0);
675 exprNode_isUnknownConstant (/*@notnull@*/ exprNode e)
677 while (e->kind == XPR_PARENS)
679 e = exprData_getUopNode (e->edata);
681 if (!exprNode_isDefined (e))
686 /* evans 2002-02-05: was llassert (exprNode_isDefined (e)); but this can fail */
689 if (e->kind == XPR_CONST)
691 multiVal m = exprNode_getValue (e);
693 if (multiVal_isUnknown (m))
703 exprNode_numLiteral (ctype c, /*@temp@*/ cstring t,
704 /*@only@*/ fileloc loc, long val)
706 exprNode e = exprNode_createLoc (c, loc);
708 e->kind = XPR_NUMLIT;
710 llassert (multiVal_isUndefined (e->val));
711 e->val = multiVal_makeInt (val);
712 e->edata = exprData_makeLiteral (cstring_copy (t));
716 e->sref = sRef_makeUnknown ();
717 sRef_setDefNull (e->sref, e->loc);
720 DPRINTF (("Num lit: %s / %s", exprNode_unparse (e), ctype_unparse (exprNode_getType (e))));
725 exprNode_charLiteral (char c, cstring text, /*@only@*/ fileloc loc)
727 exprNode e = exprNode_createLoc (ctype_char, loc);
729 if (context_getFlag (FLG_CHARINTLITERAL))
731 e->typ = ctype_makeConj (ctype_char, ctype_int);
734 e->kind = XPR_NUMLIT;
735 e->val = multiVal_makeChar (c);
737 e->edata = exprData_makeLiteral (cstring_copy (text));
742 exprNode_floatLiteral (double d, ctype ct, cstring text, /*@only@*/ fileloc loc)
744 exprNode e = exprNode_createLoc (ct, loc);
746 e->kind = XPR_NUMLIT;
747 e->val = multiVal_makeDouble (d);
748 e->edata = exprData_makeLiteral (cstring_copy (text));
752 multiVal exprNode_getValue (exprNode e)
754 while (exprNode_isInParens (e)) {
755 if (e->edata != NULL) {
756 e = exprData_getUopNode (e->edata);
762 if (exprNode_isDefined (e)) {
765 return multiVal_undefined;
770 exprNode_combineLiterals (exprNode e, exprNode rest)
774 /* Both must be string literals. */
776 if (exprNode_isUndefined (rest) || exprNode_isUndefined (e))
778 exprNode_free (rest);
782 if (!exprNode_isStringLiteral (e))
786 message ("Constant concatentation is ungrammatical: %s %s", exprNode_unparse (e),
787 exprNode_unparse (rest)),
789 exprNode_free (rest);
793 if (!exprNode_isStringLiteral (rest))
797 message ("Constant concatentation is ungrammatical: %s %s", exprNode_unparse (e), exprNode_unparse (rest)),
800 exprNode_free (rest);
804 ns = cstring_concat (multiVal_forceString (exprNode_getValue (e)),
805 multiVal_forceString (exprNode_getValue (rest)));
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);
816 exprNode_rawStringLiteral (/*@only@*/ cstring t, /*@only@*/ fileloc loc)
818 exprNode e = exprNode_createLoc (ctype_string, loc);
819 size_t len = cstring_length (t);
821 if (context_getFlag (FLG_STRINGLITERALLEN))
823 if (len > size_fromInt (context_getValue (FLG_STRINGLITERALLEN)))
825 voptgenerror (FLG_STRINGLITERALLEN,
827 ("String literal length (%d) exceeds maximum "
828 "length (%d): \"%s\"",
830 context_getValue (FLG_STRINGLITERALLEN),
836 e->kind = XPR_STRINGLITERAL;
837 e->val = multiVal_makeString (cstring_copy (t));
838 e->edata = exprData_makeLiteral (t);
839 e->sref = sRef_makeConst (ctype_string);
841 if (context_getFlag (FLG_READONLYSTRINGS))
843 sRef_setAliasKind (e->sref, AK_STATIC, fileloc_undefined);
844 sRef_setExKind (e->sref, XO_OBSERVER, loc);
848 sRef_setAliasKind (e->sref, AK_ERROR, fileloc_undefined);
851 return (e); /* s released */
855 exprNode_wideStringLiteral (/*@only@*/ cstring t, /*@only@*/ fileloc loc)
857 exprNode res = exprNode_stringLiteral (t, loc);
858 res->typ = ctype_makeWideString ();
863 exprNode_stringLiteral (/*@only@*/ cstring t, /*@only@*/ fileloc loc)
865 size_t len = size_fromInt (size_toInt (cstring_length (t)) - 2);
866 char *ts = cstring_toCharsSafe (t);
867 char *s = cstring_toCharsSafe (cstring_create (len + 1));
869 llassert (*ts == '\"' && *(ts + len + 1) == '\"');
870 strncpy (s, ts+1, len);
873 return exprNode_rawStringLiteral (cstring_fromCharsO (s), loc);
876 exprNode exprNode_fromUIO (cstring c)
878 fileloc loc = context_getSaveLocation ();
879 exprNode e = exprNode_createPlain (ctype_unknown);
883 if (fileloc_isUndefined (loc))
885 loc = fileloc_copy (g_currentloc);
888 e->loc = loc; /* save loc was mangled */
889 e->sref = sRef_undefined;
891 if (usymtab_exists (c))
893 uentry ue = usymtab_lookupEither (c);
895 if (uentry_isDatatype (ue)
896 && uentry_isSpecified (ue))
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));
909 llassertprint (!usymtab_exists (c), ("Entry exists: %s", c));
912 ** was supercedeGlobalEntry...is this better?
915 if (!context_inIterEnd ())
917 if (context_inMacro ())
919 if (context_getFlag (FLG_UNRECOG))
923 message ("Unrecognized identifier in macro definition: %s", c), e->loc);
927 flagcode_recordSuppressed (FLG_UNRECOG);
933 (FLG_UNRECOG, message ("Unrecognized identifier: %s", c), e->loc);
937 e->edata = exprData_makeId (uentry_makeUnrecognized (c, fileloc_copy (loc)));
939 /* No alias errors for unrecognized identifiers */
940 sRef_setAliasKind (e->sref, AK_ERROR, loc);
945 exprNode exprNode_makeConstantString (cstring c, /*@only@*/ fileloc loc)
947 exprNode e = exprNode_createPlain (ctype_unknown);
950 e->sref = sRef_makeConst (ctype_string);
951 e->edata = exprData_makeId (uentry_makeUnrecognized (c, fileloc_copy (loc)));
952 e->typ = ctype_string;
954 /* No alias errors for unrecognized identifiers */
955 sRef_setAliasKind (e->sref, AK_STATIC, loc);
956 sRef_setExKind (e->sref, XO_OBSERVER, loc);
961 exprNode exprNode_createId (/*@observer@*/ uentry c)
963 if (uentry_isValid (c))
965 exprNode e = exprNode_new ();
967 DPRINTF (("create id: %s", uentry_unparse (c)));
969 e->typ = uentry_getType (c);
971 if (uentry_isFunction (c)
972 && !sRef_isLocalVar (uentry_getSref (c)))
974 e->sref = sRef_undefined;
978 e->sref = uentry_getSref (c);
981 if (sRef_isStateUnknown (e->sref) && uentry_isNonLocal (c))
983 sRef_setDefined (e->sref, fileloc_undefined);
987 ** yoikes! leaving this out was a heinous bug...that would have been
988 ** caught if i had splint working first. gag!
991 e->etext = cstring_undefined;
993 if (uentry_isEitherConstant (c))
996 e->val = multiVal_copy (uentry_getConstantValue (c));
1001 e->val = multiVal_unknown ();
1004 e->edata = exprData_makeId (c);
1005 e->loc = context_getSaveLocation ();
1007 if (fileloc_isUndefined (e->loc))
1009 fileloc_free (e->loc);
1010 e->loc = fileloc_copy (g_currentloc);
1013 e->guards = guardSet_new ();
1014 e->sets = sRefSet_new ();
1015 e->msets = sRefSet_new ();
1016 e->uses = sRefSet_new ();
1018 /*> missing fields, detected by splint <*/
1019 e->exitCode = XK_NEVERESCAPE;
1020 e->isJumpPoint = FALSE;
1021 e->canBreak = FALSE;
1022 e->mustBreak = FALSE;
1024 exprNode_defineConstraints (e);
1029 return exprNode_createUnknown ();
1033 /*@notnull@*/ exprNode
1034 exprNode_fromIdentifier (/*@observer@*/ uentry c)
1038 if (context_justPopped ()) /* watch out! c could be dead */
1040 uentry ce = usymtab_lookupSafe (cscannerHelp_observeLastIdentifier ());
1042 if (uentry_isValid (ce))
1048 llbuglit ("Looks like Aunt Millie forgot to walk to dog again.");
1052 ret = exprNode_fromIdentifierAux (c);
1056 static void exprNode_checkStringLiteralLength (ctype t1, exprNode e2)
1058 multiVal mval = exprNode_getValue (e2);
1062 if (ctype_isFixedArray (t1))
1064 size_t nelements = ctype_getArraySize (t1);
1066 llassert (multiVal_isString (mval));
1067 slit = multiVal_forceString (mval);
1069 len = cstring_lengthExpandEscapes (slit);
1071 llassert (exprNode_isDefined (e2));
1073 if (len == nelements)
1077 temp = cstring_expandEscapes (slit);
1079 if (temp[len-1] == '\0')
1082 (FLG_STRINGLITNOROOMFINALNULL,
1083 message ("String literal with %d character%& "
1084 "is assigned to %s (no room for final null terminator): %s",
1085 size_toInt (len + 1),
1087 exprNode_unparse (e2)),
1093 (FLG_STRINGLITNOROOM,
1094 message ("String literal with %d character%& "
1095 "is assigned to %s (no room for null terminator): %s",
1096 size_toInt (len + 1),
1098 exprNode_unparse (e2)),
1102 else if (len > nelements)
1105 (FLG_STRINGLITTOOLONG,
1106 message ("String literal with %d character%& (counting null terminator) "
1107 "is assigned to %s (insufficient storage available): %s",
1108 size_toInt (len + 1),
1110 exprNode_unparse (e2)),
1113 else if (len < nelements - 1)
1116 (FLG_STRINGLITSMALLER,
1117 message ("String literal with %d character%& is assigned to %s (possible waste of storage): %s",
1118 size_toInt (len + 1),
1120 exprNode_unparse (e2)),
1130 static /*@only@*/ /*@notnull@*/ exprNode
1131 exprNode_fromIdentifierAux (/*@observer@*/ uentry c)
1133 exprNode e = exprNode_createId (c);
1136 uentry_setUsed (c, e->loc);
1138 if (uentry_isVar (c) && sRef_isFileOrGlobalScope (sr))
1140 checkGlobUse (c, FALSE, e);
1147 exprNode_isZero (exprNode e)
1149 if (exprNode_isDefined (e))
1151 multiVal m = exprNode_getValue (e);
1153 if (multiVal_isInt (m))
1155 return (multiVal_forceInt (m) == 0);
1163 exprNode_isNonNegative (exprNode e)
1165 if (exprNode_isDefined (e))
1167 multiVal m = exprNode_getValue (e);
1169 if (multiVal_isInt (m))
1171 return (multiVal_forceInt (m) >= 0);
1175 ** This is not always true if programmer defines enum
1176 ** values, but then the constant should be known.
1179 if (ctype_isEnum (ctype_realType (e->typ)))
1189 ** a[x] - uses a but NOT a[]
1190 ** result sref = a[] (set/use in assignment)
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
1198 exprNode_arrayFetch (/*@only@*/ exprNode e1, /*@only@*/ exprNode e2)
1201 ** error in arr, error propagates (no new messages)
1202 ** error in ind, assume valid and continue
1205 DPRINTF (("Array fetch: %s / %s",
1206 exprNode_unparse (e1), exprNode_unparse (e2)));
1208 if (exprNode_isError (e1))
1211 return (exprNode_makeError ());
1217 ctype carr = exprNode_getType (e1);
1218 ctype crarr = ctype_realType (carr);
1221 ** this sets up funny aliasing, that leads to spurious
1222 ** splint errors. Hence, the i2 comments.
1225 /* evans 2001-09-09 added ctype_isKnown so there is no swap when e1 type is unknown */
1226 if (ctype_isKnown (crarr)
1227 && !ctype_isRealArray (crarr)
1228 && ctype_isRealNumeric (crarr)
1229 && !exprNode_isError (e2)
1230 && ctype_isRealAP (exprNode_getType (e2))) /* fetch like 3[a] */
1235 carr = exprNode_getType (arr);
1236 crarr = ctype_realType (carr);
1244 DPRINTF (("arr: %s", exprNode_unparse (arr)));
1246 if (sRef_possiblyNull (arr->sref))
1248 if (!usymtab_isGuarded (arr->sref))
1250 if (!context_inSizeof() )
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)),
1259 DPRINTF (("ref: %s", sRef_unparseFull (arr->sref)));
1260 sRef_showNullInfo (arr->sref);
1262 /* suppress future messages */
1263 sRef_setNullError (arr->sref);
1269 if (exprNode_isError (ind))
1271 if ((ctype_isArrayPtr (crarr)
1272 && !ctype_isFunction (crarr))
1273 || ctype_isUnknown (carr))
1275 exprNode ret = exprNode_createPartialCopy (arr);
1277 if (ctype_isKnown (carr))
1279 ret->typ = ctype_baseArrayPtr (crarr);
1283 ret->typ = ctype_unknown;
1286 ret->sref = sRef_makeArrayFetch (arr->sref);
1288 ret->kind = XPR_FETCH;
1291 ** Because of funny aliasing (when arr and ind are
1292 ** flipped) spurious errors would be reported here.
1295 /*@i2@*/ ret->edata = exprData_makePair (arr, ind);
1296 checkSafeUse (ret, arr->sref);
1301 voptgenerror (FLG_TYPE,
1302 message ("Array fetch from non-array (%t): %s[%s]", carr,
1303 exprNode_unparse (e1), exprNode_unparse (e2)),
1305 exprNode_free (arr);
1306 return (exprNode_makeError ());
1311 if (!ctype_isForceRealInt (&(ind->typ)))
1313 ctype rt = ctype_realType (ind->typ);
1315 if (ctype_isChar (rt))
1319 message ("Array fetch using non-integer, %t: %s[%s]",
1321 exprNode_unparse (e1), exprNode_unparse (e2)),
1324 else if (ctype_isEnum (rt))
1328 message ("Array fetch using non-integer, %t: %s[%s]",
1330 exprNode_unparse (e1), exprNode_unparse (e2)),
1337 message ("Array fetch using non-integer, %t: %s[%s]",
1339 exprNode_unparse (e1), exprNode_unparse (e2)),
1343 multiVal_free (ind->val);
1344 ind->val = multiVal_unknown ();
1347 if (ctype_isArrayPtr (crarr) && !ctype_isFunction (crarr))
1349 exprNode ret = exprNode_createSemiCopy (arr);
1350 multiVal m = exprNode_getValue (ind);
1352 ret->typ = ctype_baseArrayPtr (crarr);
1353 ret->kind = XPR_FETCH;
1355 if (multiVal_isInt (m))
1357 int i = (int) multiVal_forceInt (m);
1359 if (sRef_isValid (arr->sref)) {
1360 ret->sref = sRef_makeArrayFetchKnown (arr->sref, i);
1362 ret->sref = sRef_undefined;
1367 ret->sref = sRef_makeArrayFetch (arr->sref);
1370 ret->sets = sRefSet_realNewUnion (arr->sets, ind->sets);
1371 ret->msets = sRefSet_realNewUnion (arr->msets, ind->msets);
1372 ret->uses = sRefSet_realNewUnion (arr->uses, ind->uses);
1374 /* (see comment on spurious errors above) */
1375 /*@i2@*/ ret->edata = exprData_makePair (arr, ind);
1377 exprNode_checkUse (ret, ind->sref, ind->loc);
1378 exprNode_checkUse (ret, arr->sref, arr->loc);
1384 if (ctype_isUnknown (carr))
1386 exprNode ret = exprNode_createPartialCopy (arr);
1388 ret->kind = XPR_FETCH;
1389 ret->typ = ctype_unknown;
1390 ret->sets = sRefSet_union (ret->sets, ind->sets);
1391 ret->msets = sRefSet_union (ret->msets, ind->msets);
1392 ret->uses = sRefSet_union (ret->uses, ind->uses);
1394 /* (see comment on spurious errors above) */
1395 /*@i2@*/ ret->edata = exprData_makePair (arr, ind);
1397 exprNode_checkUse (ret, ind->sref, ind->loc);
1398 exprNode_checkUse (ret, arr->sref, arr->loc);
1405 message ("Array fetch from non-array (%t): %s[%s]", carr,
1406 exprNode_unparse (e1), exprNode_unparse (e2)),
1409 exprNode_free (arr);
1410 exprNode_free (ind);
1412 return (exprNode_makeError ());
1422 checkArgs (uentry fcn, /*@dependent@*/ exprNode f, ctype t,
1423 exprNodeList args, exprNode ret)
1425 return (checkArgsReal (fcn, f, ctype_argsFunction (t), args, FALSE, ret));
1429 ** checkPrintfArgs --- checks arguments for printf-like functions
1430 ** Arguments before ... have already been checked.
1431 ** The argument before the ... is a char *.
1432 ** argno is the format string argument.
1436 checkPrintfArgs (/*@notnull@*/ /*@dependent@*/ exprNode f, uentry fcn,
1437 exprNodeList args, exprNode ret, int argno)
1440 ** the last argument before the elips is the format string
1445 int nargs = exprNodeList_size (args);
1446 uentryList params = uentry_getParams (fcn);
1450 ** These should be ensured by checkSpecialFunction
1453 llassert (uentryList_size (params) == argno + 1);
1454 llassert (uentry_isElipsisMarker (uentryList_getN (params, argno)));
1456 a = exprNodeList_getN (args, argno - 1);
1457 formatloc = fileloc_copy (exprNode_loc (a));
1459 if (exprNode_isDefined (a) && exprNode_isStringLiteral (a)
1460 && exprNode_knownStringValue (a))
1462 char *format = cstring_toCharsSafe (multiVal_forceString (exprNode_getValue (a)));
1463 char *code = format;
1466 nargs = exprNodeList_size (args);
1468 while ((code = strchr (code, '%')) != NULL)
1470 char *origcode = code;
1471 cstring codetext = cstring_newEmpty ();
1472 char key = *(++code);
1473 ctype modtype = ctype_int;
1474 bool modified = FALSE;
1476 fileloc_addColumn (formatloc, code - ocode);
1478 codetext = cstring_appendChar (codetext, key);
1481 while (isFlagKey (key))
1484 codetext = cstring_appendChar (codetext, key);
1485 fileloc_incColumn (formatloc);
1488 if (key == 'm') /* skipped in syslog */
1493 /* ignore field width */
1494 while (isdigit ((int) key) != 0)
1497 codetext = cstring_appendChar (codetext, key);
1498 fileloc_incColumn (formatloc);
1501 /* ignore precision */
1505 codetext = cstring_appendChar (codetext, key);
1506 fileloc_incColumn (formatloc);
1509 ** In printf, '*' means: read the next arg as an int for the
1510 ** field width. This seems to be missing from my copy of the
1511 ** standard x3.159-1989. Setion 4.9.6.1 refers to * (described
1512 ** later) but never does.
1517 ; /* don't do anything --- handle later */
1521 while (isdigit ((int) key) != 0)
1524 codetext = cstring_appendChar (codetext, key);
1525 fileloc_incColumn (formatloc);
1532 modtype = ctype_sint; /* short */
1534 codetext = cstring_appendChar (codetext, key);
1535 fileloc_incColumn (formatloc);
1537 else if (key == 'l' || key == 'L')
1539 modtype = ctype_lint; /* long */
1541 codetext = cstring_appendChar (codetext, key);
1542 fileloc_incColumn (formatloc);
1544 if (key == 'l' || key == 'L') {
1545 modtype = ctype_llint; /* long long */
1547 codetext = cstring_appendChar (codetext, key);
1548 fileloc_incColumn (formatloc);
1556 /* now, key = type of conversion to apply */
1558 fileloc_incColumn (formatloc);
1566 message ("No argument corresponding to %q format "
1567 "code %d (%%%s): \"%s\"",
1568 uentry_getName (fcn),
1570 cstring_fromChars (format)),
1573 if (fileloc_isDefined (formatloc)
1574 && context_getFlag (FLG_SHOWCOL))
1576 llgenindentmsg (cstring_makeLiteral ("Corresponding format code"),
1584 a = exprNodeList_getN (args, i);
1587 if (!exprNode_isError (a))
1593 case '*': /* int argument for fieldwidth */
1594 expecttype = ctype_int;
1595 *(--code) = '%'; /* convert it for next code */
1596 fileloc_subColumn (formatloc, 1);
1597 /*@switchbreak@*/ break;
1600 expecttype = ctype_combine (ctype_uint, modtype);
1601 /*@switchbreak@*/ break;
1603 case 'i': /* int argument */
1605 expecttype = ctype_combine (ctype_int, modtype);
1606 /*@switchbreak@*/ break;
1608 case 'x': /* unsigned int */
1610 expecttype = ctype_combine (ctype_uint, modtype);
1612 /*@switchbreak@*/ break;
1618 case 'f': /* double */
1619 expecttype = ctype_combine (ctype_double, modtype);
1620 /*@switchbreak@*/ break;
1622 case 'c': /* int converted to char (check its a char?) */
1623 expecttype = ctype_makeConj (ctype_int,
1624 ctype_makeConj (ctype_char,
1627 /* evans 2001-10-05 - changed to reflect correct ISO spec:
1628 int converted to char */
1630 /* expecttype = ctype_makeConj (ctype_char, ctype_uchar); */
1631 /*@switchbreak@*/ break;
1633 case 's': /* string */
1634 expecttype = ctype_string;
1635 /*@switchbreak@*/ break;
1638 while (((key = *(++code)) != ']')
1641 codetext = cstring_appendChar (codetext, key);
1642 fileloc_incColumn (formatloc);
1648 (message ("Bad character set format: %s",
1649 cstring_fromChars (origcode)));
1652 expecttype = ctype_string;
1653 /*@switchbreak@*/ break;
1655 case 'p': /* pointer */
1656 expecttype = ctype_makePointer (ctype_void);
1657 /* need not be defined */
1658 uentry_setDefState (regArg, SS_RELDEF);
1659 sRef_setPosNull (uentry_getSref (regArg),
1662 /*@switchbreak@*/ break;
1664 case 'n': /* pointer to int, modified by call! */
1665 expecttype = ctype_combine (ctype_makePointer (ctype_int), modtype);
1667 uentry_setDefState (regArg, SS_ALLOCATED); /* corresponds to out */
1668 /*@switchbreak@*/ break;
1670 case 'm': /* in a syslog, it doesn't consume an argument */
1671 /* should check we're really doing syslog */
1673 /*@switchbreak@*/ break;
1677 expecttype = ctype_unknown;
1681 message ("Unrecognized format code: %s",
1682 cstring_fromChars (origcode)),
1683 fileloc_isDefined (formatloc)
1684 ? formatloc : g_currentloc);
1686 /*@switchbreak@*/ break;
1689 if (!(exprNode_matchArgType (expecttype, a)))
1691 if (ctype_isVoidPointer (expecttype)
1692 && ctype_isRealAbstract (a->typ)
1693 && (context_getFlag (FLG_ABSTVOIDP)))
1699 if (llgenformattypeerror
1700 (expecttype, exprNode_undefined,
1702 message ("Format argument %d to %q (%%%s) expects "
1705 uentry_getName (fcn),
1708 a->typ, exprNode_unparse (a)),
1711 if (fileloc_isDefined (formatloc)
1712 && context_getFlag (FLG_SHOWCOL))
1715 (cstring_makeLiteral
1716 ("Corresponding format code"),
1723 uentry_setType (regArg, expecttype);
1724 checkOneArg (regArg, a, f, FALSE, i+1, nargs);
1726 if (ctype_equal (expecttype, ctype_string))
1728 exprNode_checkUse (a, sRef_makePointer (a->sref), a->loc);
1731 uentry_setType (regArg, ctype_unknown);
1732 uentry_fixupSref (regArg);
1736 exprNode_checkCallModifyVal (a->sref, args, f, ret);
1747 cstring_free (codetext);
1752 voptgenerror (FLG_TYPE,
1753 message ("Format string for %q has %d arg%&, given %d",
1754 uentry_getName (fcn), i - argno, nargs - argno),
1760 /* no checking possible for compile-time unknown format strings */
1761 if (exprNode_isDefined (a))
1765 message ("Format string parameter to %s is not a compile-time constant: %s",
1766 exprNode_unparse (f),
1767 exprNode_unparse (a)),
1772 fileloc_free (formatloc);
1776 checkScanfArgs (/*@notnull@*/ /*@dependent@*/ exprNode f, uentry fcn,
1777 exprNodeList args, exprNode ret, int argno)
1781 int nargs = exprNodeList_size (args);
1782 uentryList params = uentry_getParams (fcn);
1786 ** These should be ensured by checkSpecialFunction
1789 llassert (uentryList_size (params) == argno + 1);
1790 llassert (uentry_isElipsisMarker (uentryList_getN (params, argno)));
1792 a = exprNodeList_getN (args, argno - 1);
1793 formatloc = fileloc_copy (exprNode_loc (a));
1795 if (exprNode_isDefined (a) && exprNode_isStringLiteral (a)
1796 && exprNode_knownStringValue (a))
1798 char *format = cstring_toCharsSafe (multiVal_forceString (exprNode_getValue (a)));
1799 char *code = format;
1802 nargs = exprNodeList_size (args);
1804 while ((code = strchr (code, '%')) != NULL)
1806 char *origcode = code;
1807 char key = *(++code);
1808 cstring codetext = cstring_newEmpty ();
1809 ctype modtype = ctype_int;
1810 char modifier = '\0';
1811 bool modified = TRUE;
1812 bool ignore = FALSE;
1814 codetext = cstring_appendChar (codetext, key);
1815 fileloc_addColumn (formatloc, code - ocode);
1818 ** this is based on ANSI standard library description of fscanf
1819 ** (from ANSI standard X3.159-1989, 4.9.6.1)
1822 /* '*' suppresses assignment (does not need match argument) */
1827 codetext = cstring_appendChar (codetext, key);
1830 fileloc_incColumn (formatloc);
1833 /* ignore field width */
1834 while (isdigit ((int) key) != 0)
1837 codetext = cstring_appendChar (codetext, key);
1838 fileloc_incColumn (formatloc);
1843 modtype = ctype_sint; /* short */
1845 codetext = cstring_appendChar (codetext, key);
1846 fileloc_incColumn (formatloc);
1848 else if (key == 'l' || key == 'L')
1850 modtype = ctype_lint; /* long */
1854 codetext = cstring_appendChar (codetext, key);
1856 fileloc_incColumn (formatloc);
1858 if (key == 'l' || key == 'L') {
1859 modtype = ctype_llint; /* long long */
1861 codetext = cstring_appendChar (codetext, key);
1862 fileloc_incColumn (formatloc);
1870 /* now, key = type of conversion to apply */
1872 fileloc_incColumn (formatloc);
1886 message ("No argument corresponding to %q format "
1887 "code %d (%%%s): \"%s\"",
1888 uentry_getName (fcn),
1890 cstring_fromChars (format)),
1893 if (fileloc_isDefined (formatloc)
1894 && context_getFlag (FLG_SHOWCOL))
1897 (cstring_makeLiteral ("Corresponding format code"),
1905 a = exprNodeList_getN (args, i);
1908 if (!exprNode_isError (a))
1914 case '*': /* int argument for fieldwidth */
1915 expecttype = ctype_makePointer (ctype_int);
1916 *(--code) = '%'; /* convert it for next code */
1917 fileloc_subColumn (formatloc, 1);
1918 /*@switchbreak@*/ break;
1921 expecttype = ctype_makePointer (ctype_combine (ctype_uint, modtype));
1922 /*@switchbreak@*/ break;
1927 case 'X': /* unsigned int */
1928 expecttype = ctype_makePointer (ctype_combine (ctype_int, modtype));
1929 /*@switchbreak@*/ break;
1936 /* printf is double, scanf is float! */
1938 if (modifier == 'l')
1940 expecttype = ctype_makePointer (ctype_double);
1942 else if (modifier == 'L')
1944 expecttype = ctype_makePointer (ctype_ldouble);
1948 llassert (modifier == '\0');
1949 expecttype = ctype_makePointer (ctype_float);
1951 /*@switchbreak@*/ break;
1953 case 'c': /* int converted to char (check its a char?) */
1954 expecttype = ctype_makePointer (ctype_makeConj (ctype_char, ctype_uchar));
1955 /*@switchbreak@*/ break;
1957 case 's': /* string */
1958 expecttype = ctype_string;
1959 /*@switchbreak@*/ break;
1963 while (((key = *(++code)) != ']')
1966 codetext = cstring_appendChar (codetext, key);
1967 fileloc_incColumn (formatloc);
1973 (message ("Bad character set format: %s",
1974 cstring_fromChars (origcode)));
1977 expecttype = ctype_string;
1978 /*@switchbreak@*/ break;
1981 case 'p': /* pointer */
1984 message ("Format code should not be used in scanf: %s",
1985 cstring_fromChars (origcode)),
1986 fileloc_isDefined (formatloc)
1987 ? formatloc : g_currentloc);
1989 expecttype = ctype_unknown;
1990 /*@switchbreak@*/ break;
1992 case 'n': /* pointer to int, modified by call! */
1993 expecttype = ctype_makePointer (ctype_int);
1994 /*@switchbreak@*/ break;
1997 expecttype = ctype_unknown;
2001 message ("Unrecognized format code: %s",
2002 cstring_fromChars (origcode)),
2003 fileloc_isDefined (formatloc)
2004 ? formatloc : g_currentloc);
2006 /*@switchbreak@*/ break;
2009 if (!(exprNode_matchArgType (expecttype, a)))
2011 if (ctype_isVoidPointer (expecttype)
2012 && ctype_isRealAbstract (a->typ)
2013 && (context_getFlag (FLG_ABSTVOIDP)))
2019 if (llgenformattypeerror
2020 (expecttype, exprNode_undefined,
2022 message ("Format argument %d to %q (%%%s) expects "
2025 uentry_getName (fcn),
2026 codetext, expecttype,
2027 a->typ, exprNode_unparse (a)),
2030 if (fileloc_isDefined (formatloc)
2031 && context_getFlag (FLG_SHOWCOL))
2034 (cstring_makeLiteral
2035 ("Corresponding format code"),
2042 uentry_setType (outArg, expecttype);
2043 checkOneArg (outArg, a, f, FALSE, i+1, nargs);
2044 uentry_setType (outArg, ctype_unknown);
2045 uentry_fixupSref (outArg);
2049 exprNode_checkCallModifyVal (a->sref, args, f, ret);
2054 /* a->sref = sRef_undefined; */
2061 cstring_free (codetext);
2066 voptgenerror (FLG_TYPE,
2067 message ("Format string for %q has %d arg%&, given %d",
2068 uentry_getName (fcn), i - argno, nargs - argno),
2074 /* no checking possible for compile-time unknown format strings */
2077 fileloc_free (formatloc);
2081 checkMessageArgs (/*@notnull@*/ /*@dependent@*/ exprNode f,
2084 /*@unused@*/ int argno)
2087 ** the last argument before the elips is the format string
2090 int nargs = exprNodeList_size (args);
2095 a = exprNodeList_getN (args, argno - 1);
2096 formatloc = fileloc_copy (exprNode_loc (a));
2098 if (ctype_isUnknown (cstringType)) {
2099 if (usymtab_existsType (cstring_makeLiteralTemp ("cstring")))
2101 cstringType = usymtab_lookupAbstractType (cstring_makeLiteralTemp ("cstring"));
2105 if (ctype_isUnknown (ctypeType)) {
2106 if (usymtab_existsType (cstring_makeLiteralTemp ("ctype")))
2108 ctypeType = usymtab_lookupAbstractType (cstring_makeLiteralTemp ("ctype"));
2112 if (ctype_isUnknown (filelocType)) {
2113 if (usymtab_existsType (cstring_makeLiteralTemp ("fileloc")))
2115 filelocType = usymtab_lookupAbstractType (cstring_makeLiteralTemp ("fileloc"));
2119 if (exprNode_isDefined (a) && exprNode_isStringLiteral (a)
2120 && exprNode_knownStringValue (a))
2122 cstring format = multiVal_forceString (exprNode_getValue (a));
2123 char *code = cstring_toCharsSafe (format);
2126 nargs = exprNodeList_size (args);
2128 while ((code = strchr (code, '%')) != NULL)
2130 char *origcode = code;
2131 char key = *(++code);
2132 cstring codetext = cstring_newEmpty ();
2133 bool isOnly = FALSE;
2135 codetext = cstring_appendChar (codetext, key);
2137 fileloc_addColumn (formatloc, code - ocode);
2139 while (key >= '0' && key <= '9')
2142 codetext = cstring_appendChar (codetext, key);
2143 fileloc_incColumn (formatloc);
2147 fileloc_incColumn (formatloc);
2151 if (key == '&') /* plural marker */
2160 message ("Message missing format arg %d (%%%s): \"%s\"",
2161 i + 1, codetext, format),
2167 a = exprNodeList_getN (args, i);
2171 if (!exprNode_isError (a))
2175 /*@-loopswitchbreak@*/
2181 expecttype = ctype_char; break;
2183 expecttype = cstringType; break;
2185 expecttype = cstringType; isOnly = TRUE; break;
2187 expecttype = cstringType; isOnly = TRUE; break;
2188 case 'd': expecttype = ctype_int; break;
2189 case 'u': expecttype = ctype_uint; break;
2190 case 'w': expecttype = ctype_ulint; break;
2191 case 'f': expecttype = ctype_float; break;
2192 case 'b': expecttype = ctype_bool; break;
2193 case 't': expecttype = ctypeType; break;
2195 expecttype = ctype_makePointer (ctype_void);
2196 /* need not be defined */
2197 uentry_setDefState (regArg, SS_RELDEF);
2198 sRef_setPosNull (uentry_getSref (regArg),
2201 /*@switchbreak@*/ break;
2202 case 'l': expecttype = filelocType; break;
2203 case '&': /* a wee bit of a hack methinks */
2204 expecttype = ctype_int;
2206 case 'r': expecttype = ctype_bool; break;
2208 expecttype = ctype_unknown;
2211 message ("Unrecognized format code: %s",
2212 cstring_fromChars (origcode)),
2213 fileloc_isDefined (formatloc)
2214 ? formatloc : g_currentloc);
2217 /*@=loopswitchbreak@*/
2219 if (!(exprNode_matchArgType (expecttype, a)))
2221 if (ctype_isVoidPointer (expecttype)
2222 && ctype_isRealAbstract (a->typ)
2223 && (context_getFlag (FLG_ABSTVOIDP)))
2229 if (llgenformattypeerror
2230 (expecttype, exprNode_undefined,
2232 message ("Format argument %d to %q (%%%s) expects "
2235 uentry_getName (fcn),
2236 codetext, expecttype,
2237 a->typ, exprNode_unparse (a)),
2240 if (fileloc_isDefined (formatloc)
2241 && context_getFlag (FLG_SHOWCOL))
2244 (cstring_makeLiteral
2245 ("Corresponding format code"),
2252 if (ctype_equal (expecttype, cstringType))
2256 checkOneArg (csOnlyArg, a, f, FALSE, i+1, nargs);
2257 uentry_fixupSref (csOnlyArg);
2261 checkOneArg (csArg, a, f, FALSE, i+1, nargs);
2262 uentry_fixupSref (csArg);
2267 checkOneArg (regArg, a, f, FALSE, i+1, nargs);
2268 uentry_fixupSref (regArg);
2274 cstring_free (codetext);
2279 voptgenerror (FLG_TYPE,
2280 message ("Format string for %q has %d arg%&, given %d",
2281 uentry_getName (fcn), i - argno, nargs -argno),
2287 /* no checking possible for compile-time unknown format strings */
2290 fileloc_free (formatloc);
2294 checkExpressionDefinedAux (/*@notnull@*/ exprNode e1,
2295 /*@notnull@*/ exprNode e2,
2301 bool hadUncon = FALSE;
2303 if (sRef_isFileOrGlobalScope (sRef_getRootBase (e1->sref)) &&
2304 sRefSet_hasUnconstrained (sets2))
2307 (FLG_EVALORDERUNCON,
2309 ("Expression may have undefined behavior (%q used in right operand "
2310 "may set global variable %q used in left operand): %s %s %s",
2311 sRefSet_unparseUnconstrained (sets2),
2312 sRef_unparse (sRef_getRootBase (e1->sref)),
2313 exprNode_unparse (e1), lltok_unparse (op), exprNode_unparse (e2)),
2317 if (sRef_isFileOrGlobalScope (sRef_getRootBase (e2->sref)) &&
2318 sRefSet_hasUnconstrained (sets1))
2321 (FLG_EVALORDERUNCON,
2323 ("Expression has undefined behavior (%q used in left operand "
2324 "may set global variable %q used in right operand): %s %s %s",
2325 sRefSet_unparseUnconstrained (sets1),
2326 sRef_unparse (e2->sref),
2327 exprNode_unparse (e1), lltok_unparse (op), exprNode_unparse (e2)),
2331 sRefSet_realElements (e1->uses, sr)
2333 if (sRef_isMeaningful (sr) && sRefSet_member (sets2, sr))
2338 ("Expression has undefined behavior (left operand uses %q, "
2339 "modified by right operand): %s %s %s",
2341 exprNode_unparse (e1), lltok_unparse (op), exprNode_unparse (e2)),
2344 } end_sRefSet_realElements;
2346 sRefSet_realElements (sets1, sr)
2348 if (sRef_isMeaningful (sr))
2350 if (sRef_same (sr, e2->sref))
2355 ("Expression has undefined behavior (value of right operand "
2356 "modified by left operand): %s %s %s",
2357 exprNode_unparse (e1), lltok_unparse (op), exprNode_unparse (e2)),
2360 else if (sRefSet_member (e2->uses, sr))
2365 ("Expression has undefined behavior (left operand modifies %q, "
2366 "used by right operand): %s %s %s",
2368 exprNode_unparse (e1), lltok_unparse (op), exprNode_unparse (e2)),
2373 if (sRefSet_member (sets2, sr))
2375 if (sRef_isUnconstrained (sr))
2383 hadUncon = optgenerror
2384 (FLG_EVALORDERUNCON,
2386 ("Expression may have undefined behavior. Left operand "
2387 "calls %q; right operand calls %q. The unconstrained "
2388 "functions may modify global state used by "
2389 "the other operand): %s %s %s",
2390 sRefSet_unparseUnconstrained (sets1),
2391 sRefSet_unparseUnconstrained (sets2),
2392 exprNode_unparse (e1), lltok_unparse (op),
2393 exprNode_unparse (e2)),
2402 ("Expression has undefined behavior (both "
2403 "operands modify %q): %s %s %s",
2405 exprNode_unparse (e1),
2406 lltok_unparse (op), exprNode_unparse (e2)),
2412 } end_sRefSet_realElements;
2415 static void checkExpressionDefined (exprNode e1, exprNode e2, lltok op)
2417 bool hasError = FALSE;
2419 if (exprNode_isError (e1) || exprNode_isError (e2))
2424 if (sRefSet_member (e2->sets, e1->sref))
2426 if (e2->kind == XPR_CALL)
2432 hasError = optgenerror
2434 message ("Expression has undefined behavior "
2435 "(value of left operand %s is modified "
2436 "by right operand %s): %s %s %s",
2437 exprNode_unparse (e1),
2438 exprNode_unparse (e2),
2439 exprNode_unparse (e1), lltok_unparse (op),
2440 exprNode_unparse (e2)),
2445 if (context_getFlag (FLG_EVALORDERUNCON))
2447 if (sRefSet_member (e2->msets, e1->sref))
2449 if (e2->kind == XPR_CALL)
2455 hasError = optgenerror
2458 ("Expression has undefined behavior (value of left "
2459 "operand may be modified by right operand): %s %s %s",
2460 exprNode_unparse (e1), lltok_unparse (op),
2461 exprNode_unparse (e2)),
2469 checkExpressionDefinedAux (e1, e2, e1->sets, e2->sets, op, FLG_EVALORDER);
2471 if (context_maybeSet (FLG_EVALORDERUNCON))
2473 checkExpressionDefinedAux (e1, e2, e1->msets,
2474 e2->msets, op, FLG_EVALORDERUNCON);
2479 static void checkSequencing (exprNode p_f, exprNodeList p_args);
2482 checkArgsReal (uentry fcn, /*@dependent@*/ exprNode f, uentryList cl,
2483 exprNodeList args, bool isIter, exprNode ret)
2487 if (!exprNode_isError (f))
2489 if (!uentryList_isMissingParams (cl))
2491 int nargs = exprNodeList_size (args);
2492 int expectargs = uentryList_size (cl);
2496 if (expectargs == 0)
2504 message ("Iter %q invoked with %d args, "
2506 uentry_getName (fcn),
2514 message ("Function %s called with %d args, "
2516 exprNode_unparse (f), nargs),
2523 last = uentry_getType (uentryList_getN (cl, expectargs - 1));
2525 exprNodeList_reset (args);
2527 uentryList_elements (cl, current)
2529 ctype ct = uentry_getType (current);
2532 if (ctype_isElips (ct))
2535 ** do special checking for printf/scanf library functions
2537 ** this is kludgey code, just for handling the special case
2541 if (uentry_isPrintfLike (fcn))
2543 checkPrintfArgs (f, fcn, args, ret, i);
2546 else if (uentry_isScanfLike (fcn))
2548 checkScanfArgs (f, fcn, args, ret, i);
2551 else if (uentry_isMessageLike (fcn))
2553 checkMessageArgs (f, fcn, args, i);
2558 llassert (!uentry_isSpecialFunction (fcn));
2561 nargs = expectargs; /* avoid errors */
2566 if (i >= nargs) break;
2568 a = exprNodeList_current (args);
2569 exprNodeList_advance (args);
2573 if (exprNode_isError (a))
2580 probably necessary? I'm not sure about this one
2581 checkMacroParen (a);
2584 f->guards = guardSet_union (f->guards, a->guards);
2586 DPRINTF (("match arg: %s / %s", ctype_unparse (ct), ctype_unparse (a->typ)));
2588 if (!(exprNode_matchArgType (ct, a)))
2590 DPRINTF (("Args mismatch!"));
2592 if (ctype_isVoidPointer (ct)
2593 && (ctype_isPointer (a->typ)
2594 && (ctype_isRealAbstract (ctype_baseArrayPtr (a->typ)))))
2599 ("Pointer to abstract type (%t) used "
2601 "(arg %d to %q): %s",
2603 uentry_getName (fcn),
2604 exprNode_unparse (a)),
2612 (ct, exprNode_undefined,
2615 ("Iter %q expects arg %d to "
2616 "be %t gets %t: %s",
2617 uentry_getName (fcn),
2618 i, ct, a->typ, exprNode_unparse (a)),
2629 ("Function %q expects arg %d to be %t gets %t: %s",
2630 uentry_getName (fcn),
2631 i, ct, a->typ, exprNode_unparse (a)),
2634 DPRINTF (("Types: %s / %s",
2636 ctype_unparse (a->typ)));
2640 ** Clear null marker for abstract types.
2641 ** (It is not revealed, so suppress future messages.)
2644 if (ctype_isAbstract (a->typ))
2646 sRef_setNullUnknown (exprNode_getSref (a), a->loc);
2653 } end_uentryList_elements ;
2656 if (expectargs != nargs) /* note: not != since we may have ... */
2658 if (ctype_isElips (last))
2662 message ("Function %s called with %d args, expects at least %d",
2663 exprNode_unparse (f),
2664 nargs, expectargs - 1),
2673 message ("Iter %q invoked with %d args, expects %d",
2674 uentry_getName (fcn), nargs, expectargs),
2681 message ("Function %s called with %d args, expects %d",
2682 exprNode_unparse (f),
2695 ** Check for undefined code sequences in function arguments:
2697 ** one parameter sets something used by another parameter
2698 ** one parameter sets something set by another parameter
2702 checkSequencingOne (exprNode f, exprNodeList args,
2703 /*@notnull@*/ exprNode el, int argno)
2706 ** Do second loop, iff +undefunspec
2710 int numloops = context_maybeSet (FLG_EVALORDERUNCON) ? 2 : 1;
2712 for (checkloop = 0; checkloop < numloops; checkloop++)
2718 thissets = el->sets;
2722 llassert (checkloop == 1);
2723 thissets = el->msets;
2726 sRefSet_realElements (thissets, thisset)
2730 /*@access exprNodeList@*/
2731 for (j = 0; j < args->nelements; j++)
2733 exprNode jl = args->elements[j];
2734 int thisargno = j + 1;
2736 if (thisargno != argno && exprNode_isDefined (jl))
2738 sRefSet otheruses = jl->uses;
2740 if (sRef_isFileOrGlobalScope (sRef_getRootBase (jl->sref)) &&
2741 sRefSet_hasUnconstrained (thissets))
2744 (FLG_EVALORDERUNCON,
2747 ("%q used in argument %d may set "
2748 "global variable %q used by argument %d: %s(%q)",
2749 cstring_capitalizeFree (sRefSet_unparseUnconstrained (thissets)),
2752 sRef_unparse (sRef_getRootBase (jl->sref)),
2754 exprNode_unparse (f), exprNodeList_unparse (args)),
2758 if (sRefSet_member (otheruses, thisset))
2760 if (sRef_isUnconstrained (thisset))
2763 (FLG_EVALORDERUNCON,
2765 ("Unconstrained functions used in arguments %d (%q) "
2766 "and %d (%s) may modify "
2767 "or use global state in undefined way: %s(%q)",
2769 sRefSet_unparseUnconstrainedPlain (otheruses),
2771 sRef_unconstrainedName (thisset),
2772 exprNode_unparse (f),
2773 exprNodeList_unparse (args)),
2781 ("Argument %d modifies %q, used by argument %d "
2782 "(order of evaluation of actual parameters is "
2783 "undefined): %s(%q)",
2784 argno, sRef_unparse (thisset), thisargno,
2785 exprNode_unparse (f), exprNodeList_unparse (args)),
2791 sRefSet othersets = jl->sets;
2793 if (sRefSet_member (othersets, thisset))
2795 if (sRef_isUnconstrained (thisset))
2798 (FLG_EVALORDERUNCON,
2800 ("Unconstrained functions used in "
2801 "arguments %d (%q) and %d (%s) may modify "
2802 "or use global state in undefined way: %s(%q)",
2804 sRefSet_unparseUnconstrainedPlain (othersets),
2806 sRef_unconstrainedName (thisset),
2807 exprNode_unparse (f), exprNodeList_unparse (args)),
2815 ("Argument %d modifies %q, set by argument %d (order of"
2816 " evaluation of actual parameters is undefined): %s(%q)",
2817 argno, sRef_unparse (thisset), thisargno,
2818 exprNode_unparse (f), exprNodeList_unparse (args)),
2825 /*@noaccess exprNodeList@*/
2826 } end_sRefSet_realElements;
2831 checkSequencing (exprNode f, exprNodeList args)
2833 if (exprNodeList_size (args) > 1)
2838 /*@access exprNodeList*/
2840 for (i = 0; i < args->nelements; i++)
2842 el = args->elements[i];
2844 if (!exprNode_isError (el))
2846 checkSequencingOne (f, args, el, i + 1);
2849 /*@noaccess exprNodeList*/
2854 ** requires le = exprNode_getUentry (f)
2858 checkGlobMods (/*@notnull@*/ /*@dependent@*/ exprNode f,
2859 uentry le, exprNodeList args,
2860 /*@notnull@*/ exprNode ret, int specialArgs)
2862 bool isSpec = FALSE;
2863 bool hasMods = FALSE;
2865 globSet usesGlobs = globSet_undefined;
2866 sRefSet mods = sRefSet_undefined;
2867 bool freshMods = FALSE;
2868 uentryList params = uentryList_undefined;
2870 DPRINTF (("Check glob mods: %s", exprNode_unparse (ret)));
2873 ** check globals and modifies
2878 if (!uentry_isValid (le))
2880 ctype fr = ctype_realType (f->typ);
2882 if (ctype_isFunction (fr))
2884 params = ctype_argsFunction (fr);
2888 params = uentryList_missingParams;
2891 if (!context_getFlag (FLG_MODNOMODS)
2892 && !context_getFlag (FLG_GLOBUNSPEC))
2894 checkUnspecCall (f, params, args);
2900 fname = uentry_rawName (le);
2904 if (uentry_isFunction (le))
2906 params = uentry_getParams (le);
2907 mods = uentry_getMods (le);
2908 hasMods = uentry_hasMods (le);
2909 usesGlobs = uentry_getGlobs (le);
2910 isSpec = uentry_isSpecified (le);
2912 else /* not a function */
2914 ctype ct = ctype_realType (uentry_getType (le));
2916 llassertprint (uentry_isVar (le) && ctype_isFunction (ct),
2917 ("checkModGlobs: uentry not a function: %s",
2918 uentry_unparse (le)));
2920 params = ctype_argsFunction (ct);
2921 return; /*@32 ! remove this? */
2930 globSet_allElements (usesGlobs, el)
2932 if (sRef_isValid (el))
2934 if (sRef_isInternalState (el) || sRef_isSystemState (el))
2936 context_usedGlobal (el);
2937 exprNode_checkUse (f, el, f->loc);
2939 if (context_checkInternalUse ())
2941 if (!context_globAccess (el))
2943 if (sRef_isSystemState (el)
2944 && !context_getFlag (FLG_MODFILESYSTEM))
2953 ("Called procedure %s may access %q, but "
2954 "globals list does not include globals %s",
2955 exprNode_unparse (f),
2957 cstring_makeLiteralTemp (sRef_isInternalState (el)
2965 else if (sRef_isNothing (el) || sRef_isSpecState (el))
2971 uentry gle = sRef_getUentry (el);
2972 sRef sr = sRef_updateSref (el);
2974 if (sRef_isUndefGlob (el))
2976 sRef_setDefined (sr, f->loc);
2977 exprNode_checkSet (f, sr);
2985 if (sRef_isAllocated (el))
2987 exprNode_checkSet (f, sr);
2991 if (sRef_isStateUndefined (sr))
2996 ("%s %q used by function undefined before call: %s",
2997 sRef_getScopeName (sr),
2999 exprNode_unparse (f)),
3001 sRef_setDefined (sr, f->loc);
3003 exprNode_checkUse (f, sr, f->loc);
3006 checkGlobUse (gle, TRUE, f);
3009 if (sRef_isKilledGlob (el))
3011 sRef_kill (sr, f->loc);
3012 context_usedGlobal (sr);
3016 } end_globSet_allElements;
3022 if (context_hasMods () || context_getFlag (FLG_MODNOMODS))
3024 sRefSet smods = sRefSet_undefined;
3027 ** NEED to check for modifies anything
3031 ** check each sRef that called function modifies (ml), is
3037 sRefSet_allElements (mods, s) /* s is something which may be modified */
3039 DPRINTF (("Check modify: %s", sRef_unparse (s)));
3041 if (sRef_isKindSpecial (s))
3043 if (sRef_isSpecInternalState (s))
3045 if (context_getFlag (FLG_MODINTERNALSTRICT))
3047 exprNode_checkCallModifyVal (s, args, f, ret);
3051 sRefSet mmods = context_modList ();
3053 sRefSet_allElements (mmods, el)
3055 if (sRef_isInternalState (el))
3057 sRef_setModified (el);
3059 } end_sRefSet_allElements ;
3064 exprNode_checkCallModifyVal (s, args, f, ret);
3069 sRef rb = sRef_getRootBase (s);
3071 if (sRef_isFileOrGlobalScope (rb))
3073 context_usedGlobal (rb);
3076 if (sRef_isFileStatic (s)
3077 && !fileId_equal (fileloc_fileId (f->loc),
3078 fileloc_fileId (uentry_whereDefined (le))))
3080 smods = sRefSet_insert (smods, s);
3084 exprNode_checkCallModifyVal (s, args, f, ret);
3087 } end_sRefSet_allElements;
3092 ** Static elements in modifies set can have nasty consequences.
3093 ** (I think...have not been able to reproduce a possible bug.)
3096 if (!sRefSet_isDefined (smods))
3098 mods = sRefSet_newCopy (mods);
3101 sRefSet_allElements (smods, el)
3103 bool res = sRefSet_delete (mods, el);
3106 } end_sRefSet_allElements;
3108 sRefSet_free (smods);
3113 else if (sRefSet_isDefined (mods))
3114 { /* just check observers */
3117 sRefSet_allElements (mods, s) /* s is something which may be modified */
3119 sRef rb = sRef_getRootBase (s);
3123 if (sRef_isParam (rb))
3125 sRef b = sRef_fixBaseParam (s, args);
3127 if (sRef_isObserver (b))
3129 exprNode e = exprNodeList_nth (args, sRef_getParam (rb));
3133 message ("Function call may modify observer%q: %s",
3134 sRef_unparsePreOpt (b), exprNode_unparse (e)),
3137 sRef_showExpInfo (b);
3141 } end_sRefSet_allElements;
3145 if (!hasMods) /* no specified modifications */
3147 if (context_getFlag (FLG_MODOBSERVERUNCON))
3149 exprNodeList_elements (args, e)
3151 if (exprNode_isDefined (e))
3153 sRef s = exprNode_getSref (e);
3155 if (sRef_isObserver (s)
3156 && ctype_isMutable (sRef_getType (s)))
3159 (FLG_MODOBSERVERUNCON,
3161 ("Call to unconstrained function %s may modify observer%q: %s",
3162 exprNode_unparse (f),
3163 sRef_unparsePreOpt (s), exprNode_unparse (e)),
3166 sRef_showExpInfo (s);
3170 } end_exprNodeList_elements;
3175 checkAnyCall (f, fname, params, args, hasMods, mods, isSpec, specialArgs);
3177 ret->uses = sRefSet_union (ret->uses, f->uses);
3178 ret->sets = sRefSet_union (ret->sets, f->sets);
3179 ret->msets = sRefSet_union (ret->msets, f->msets);
3184 ** Spurious errors reported, because splint can't tell
3185 ** mods must be fresh if freshMods is true.
3188 /*@i@*/ sRefSet_free (mods);
3194 void checkGlobUse (uentry glob, bool isCall, /*@notnull@*/ exprNode e)
3196 if (uentry_isVar (glob))
3198 if (context_inFunctionLike ())
3200 sRef sr = uentry_getSref (glob);
3202 context_usedGlobal (sr);
3204 if (context_checkGlobUse (glob))
3206 if (!context_globAccess (sr))
3212 message ("Called procedure %s may access %s %q",
3213 exprNode_unparse (e),
3214 sRef_unparseScope (sr),
3215 uentry_getName (glob)),
3222 message ("Undocumented use of %s %s",
3223 sRef_unparseScope (sr),
3224 exprNode_unparse (e)),
3233 llbug (message ("Global not variable: %q", uentry_unparse (glob)));
3238 reflectEnsuresClause (exprNode ret, uentry le, exprNode f, exprNodeList args)
3240 DPRINTF (("Reflect ensures clause: %s(%s) / %s / %s",
3241 exprNode_unparse (f), exprNodeList_unparse (args),
3242 uentry_unparseFull (le),
3243 stateClauseList_unparse (uentry_getStateClauseList (le))));
3245 if (uentry_isValid (le) && uentry_isFunction (le))
3247 stateClauseList sclauses = uentry_getStateClauseList (le);
3249 if (stateClauseList_isDefined (sclauses))
3251 DPRINTF (("Reflect ensures: %s / %s / %s",
3252 uentry_unparse (le),
3253 exprNode_unparse (f), exprNodeList_unparse (args)));
3255 stateClauseList_elements (sclauses, cl)
3257 if (stateClause_hasEnsures (cl))
3259 /* Same in usymtab.c:1904 */
3260 if (stateClause_setsMetaState (cl))
3262 qual q = stateClause_getMetaQual (cl);
3263 annotationInfo ainfo = qual_getAnnotationInfo (q);
3264 metaStateInfo minfo = annotationInfo_getState (ainfo);
3265 cstring key = metaStateInfo_getName (minfo);
3266 int mvalue = annotationInfo_getValue (ainfo);
3268 sRefSet osrs = sRefSet_undefined;
3271 if (stateClause_isGlobal (cl))
3273 srs = sRefSet_single (usymtab_lookupGlobalMarker ());
3278 srs = stateClause_getRefs (cl);
3281 DPRINTF (("Reflect ensures clause: %s", stateClause_unparse (cl)));
3284 DPRINTF (("Sets meta state! %s", stateClause_unparse (cl)));
3286 sRefSet_elements (srs, sel)
3290 if (sRef_isResult (sRef_getRootBase (sel)))
3292 s = exprNode_getSref (ret);
3296 s = sRef_fixBaseParam (sel, args);
3299 DPRINTF (("Reflecting state clause on: %s / %s",
3300 sRef_unparse (sel), sRef_unparse (s)));
3302 sRef_setMetaStateValueComplete (s, key, mvalue, exprNode_loc (f));
3303 } end_sRefSet_elements;
3305 sRefSet_free (osrs);
3309 sRefSet srs = stateClause_getRefs (cl);
3310 sRefModVal modf = stateClause_getEnsuresFunction (cl);
3311 int eparam = stateClause_getStateParameter (cl);
3313 llassert (modf != NULL);
3315 DPRINTF (("Reflect after clause: %s / %s",
3316 stateClause_unparse (cl),
3317 sRefSet_unparse (srs)));
3319 sRefSet_elements (srs, sel)
3323 DPRINTF (("elements: %s", sRef_unparse (sel)));
3324 DPRINTF (("elements: %s", sRef_unparseFull (sel)));
3326 if (sRef_isResult (sRef_getRootBase (sel)))
3328 DPRINTF (("Fix base: %s / %s",
3329 sRef_unparse (sel), sRef_unparse (exprNode_getSref (ret))));
3330 s = sRef_fixBase (sel, exprNode_getSref (ret));
3331 DPRINTF (("==> %s", sRef_unparseFull (s)));
3335 s = sRef_fixBaseParam (sel, args);
3338 DPRINTF (("elements: %s", sRef_unparse (s)));
3339 DPRINTF (("elements: %s", sRef_unparseFull (s)));
3341 DPRINTF (("Reflecting state clause on: %s / %s",
3342 sRef_unparseFull (sel), sRef_unparseFull (s)));
3344 /* evans 2001-08-24 - added aliasSetCompleteParam */
3345 sRef_aliasSetCompleteParam (modf, s, eparam, exprNode_loc (f));
3347 DPRINTF (("After reflecting state clause on: %s / %s",
3348 sRef_unparseFull (sel), sRef_unparseFull (s)));
3349 } end_sRefSet_elements;
3352 } end_stateClauseList_elements ;
3355 DPRINTF (("Here: %s / %s",
3356 uentry_unparseFull (le),
3357 bool_unparse (uentry_hasMetaStateEnsures (le))));
3359 if (uentry_hasMetaStateEnsures (le))
3361 fileloc loc = exprNode_loc (f);
3363 metaStateConstraintList mscl = uentry_getMetaStateEnsures (le);
3365 metaStateConstraintList_elements (mscl, msc)
3367 metaStateSpecifier msspec = metaStateConstraint_getSpecifier (msc);
3368 metaStateInfo msinfo = metaStateSpecifier_getMetaStateInfo (msspec);
3369 metaStateExpression msexpr = metaStateConstraint_getExpression (msc);
3370 cstring key = metaStateInfo_getName (msinfo);
3371 sRef mlsr = metaStateSpecifier_getSref (msspec);
3373 sRef lastref = sRef_undefined;
3374 stateValue sval = stateValue_undefined;
3376 DPRINTF (("Meta state constraint for %s: %s", uentry_unparse (le),
3377 metaStateConstraint_unparse (msc)));
3378 DPRINTF (("Matches left: %s", sRef_unparseDebug (mlsr)));
3380 if (sRef_isResult (sRef_getRootBase (mlsr)))
3382 s = exprNode_getSref (ret);
3386 s = sRef_fixBaseParam (mlsr, args);
3389 DPRINTF (("Setting state: %s", sRef_unparseFull (s)));
3391 while (metaStateExpression_isDefined (msexpr))
3393 metaStateSpecifier ms = metaStateExpression_getSpecifier (msexpr);
3394 metaStateInfo msi = metaStateSpecifier_getMetaStateInfo (ms);
3397 DPRINTF (("Check expression: %s", metaStateExpression_unparse (msexpr)));
3399 if (metaStateExpression_isMerge (msexpr))
3401 msexpr = metaStateExpression_getRest (msexpr);
3405 msexpr = metaStateExpression_undefined;
3408 if (metaStateInfo_isDefined (msi))
3410 /* Must match lhs state */
3411 llassert (metaStateInfo_equal (msinfo, msi));
3414 if (metaStateSpecifier_isElipsis (ms))
3417 ** For elipsis, we need to merge all the relevant elipsis parameters
3421 uentryList params = uentry_getParams (le);
3422 int paramno = uentryList_size (params) - 1;
3424 if (!uentry_isElipsisMarker (uentryList_getN (params, paramno)))
3428 message ("Ensures clauses uses ... for function without ... in parameter list: %q",
3429 uentry_getName (le)),
3430 uentry_whereLast (le));
3431 /*@innerbreak@*/ break;
3434 while (paramno < exprNodeList_size (args))
3436 exprNode arg = exprNodeList_getN (args, paramno);
3437 fs = exprNode_getSref (arg);
3438 DPRINTF (("Merge arg: %s", exprNode_unparse (arg)));
3440 /* cut and pasted... gack*/
3441 if (stateValue_isDefined (sval))
3443 /* Use combination table to merge old state value with new one: */
3444 stateValue tval = sRef_getMetaStateValue (fs, key);
3446 if (stateValue_isDefined (tval))
3448 stateCombinationTable sctable = metaStateInfo_getMergeTable (msinfo);
3449 cstring msg = cstring_undefined;
3450 int nval = stateCombinationTable_lookup (sctable,
3451 stateValue_getValue (sval),
3452 stateValue_getValue (tval),
3454 DPRINTF (("Combining: %s + %s -> %d",
3455 stateValue_unparseValue (sval, msinfo),
3456 stateValue_unparseValue (tval, msinfo),
3459 if (nval == stateValue_error)
3464 ("Attributes merged in ensures clause in states that "
3465 "cannot be combined (%q is %q, %q is %q)%q",
3466 sRef_unparse (lastref),
3467 stateValue_unparseValue (sval, msinfo),
3469 stateValue_unparseValue (tval, msinfo),
3470 cstring_isDefined (msg) ?
3471 message (": %s", msg) : cstring_undefined),
3474 sRef_showMetaStateInfo (fs, key);
3478 stateValue_updateValueLoc (sval, nval, fileloc_undefined);
3479 loc = exprNode_loc (arg);
3483 DPRINTF (("No value for: %s:%s", sRef_unparse (fs), key));
3488 sval = sRef_getMetaStateValue (fs, key);
3493 if (stateValue_isError (sval))
3495 /*@innerbreak@*/ break; /* Don't merge any more values if here was an error */
3504 msr = metaStateSpecifier_getSref (ms);
3507 llassert (sRef_isParam (sRef_getRootBase (msr)));
3508 fs = sRef_fixBaseParam (msr, args);
3510 if (stateValue_isDefined (sval))
3512 /* Use combination table to merge old state value with new one: */
3513 stateValue tval = sRef_getMetaStateValue (fs, key);
3515 if (stateValue_isDefined (tval))
3517 stateCombinationTable sctable = metaStateInfo_getMergeTable (msinfo);
3518 cstring msg = cstring_undefined;
3519 int nval = stateCombinationTable_lookup (sctable,
3520 stateValue_getValue (sval),
3521 stateValue_getValue (tval),
3523 DPRINTF (("Combining: %s + %s -> %d",
3524 stateValue_unparseValue (sval, msinfo),
3525 stateValue_unparseValue (tval, msinfo),
3528 if (nval == stateValue_error)
3533 ("Attributes merged in ensures clause in states that "
3534 "cannot be combined (%q is %q, %q is %q)%q",
3535 sRef_unparse (lastref),
3536 stateValue_unparseValue (sval, msinfo),
3538 stateValue_unparseValue (tval, msinfo),
3539 cstring_isDefined (msg)
3540 ? message (": %s", msg) : cstring_undefined),
3543 sRef_showMetaStateInfo (fs, key);
3547 stateValue_updateValueLoc (sval, nval, fileloc_undefined);
3551 DPRINTF (("No value for: %s:%s", sRef_unparse (fs), key));
3556 sval = sRef_getMetaStateValue (fs, key);
3561 if (stateValue_isError (sval))
3563 /*@innerbreak@*/ break; /* Don't merge any more values if here was an error */
3568 DPRINTF (("Setting: %s:%s <- %s", sRef_unparse (s), key, stateValue_unparse (sval)));
3570 if (stateValue_isDefined (sval))
3572 sRef_setMetaStateValueComplete (s, key, stateValue_getValue (sval), loc);
3576 DPRINTF (("Undefined state: %s", cstring_toCharsSafe (sRef_unparse (s))));
3578 } end_metaStateConstraintList_elements ;
3580 metaStateConstraintList_free (mscl);
3586 checkRequiresClause (uentry le, exprNode f, exprNodeList args)
3588 DPRINTF (("Check requires clause: %s(%s) / %s / %s",
3589 exprNode_unparse (f), exprNodeList_unparse (args),
3590 uentry_unparseFull (le),
3591 stateClauseList_unparse (uentry_getStateClauseList (le))));
3593 if (uentry_isValid (le) && uentry_isFunction (le))
3595 stateClauseList sclauses = uentry_getStateClauseList (le);
3597 if (stateClauseList_isDefined (sclauses))
3599 DPRINTF (("Check requires: %s / %s / %s",
3600 uentry_unparse (le),
3601 exprNode_unparse (f), exprNodeList_unparse (args)));
3603 stateClauseList_elements (sclauses, cl)
3605 DPRINTF (("Check clause: %s / %s",
3606 stateClause_unparse (cl),
3607 bool_unparse (stateClause_hasRequires (cl))));
3609 if (stateClause_hasRequires (cl))
3611 sRefSet osrs = sRefSet_undefined;
3614 if (stateClause_isGlobal (cl))
3616 srs = sRefSet_single (usymtab_lookupGlobalMarker ());
3621 srs = stateClause_getRefs (cl);
3624 DPRINTF (("Refs: %s", sRefSet_unparse (srs)));
3626 if (stateClause_setsMetaState (cl))
3628 qual q = stateClause_getMetaQual (cl);
3629 annotationInfo ainfo = qual_getAnnotationInfo (q);
3630 metaStateInfo minfo = annotationInfo_getState (ainfo);
3631 cstring key = metaStateInfo_getName (minfo);
3632 int mvalue = annotationInfo_getValue (ainfo);
3634 DPRINTF (("Requires meta state! %s = %d", key, mvalue));
3636 sRefSet_elements (srs, sel)
3638 sRef s = sRef_fixBaseParam (sel, args);
3640 if (sRef_isResult (sRef_getRootBase (sel)))
3646 DPRINTF (("Checking state clause on: %s / %s / %s = %d",
3647 sRef_unparseFull (sel), sRef_unparseFull (s),
3650 if (!sRef_checkMetaStateValue (s, key, mvalue))
3652 DPRINTF (("HERE: %s", sRef_unparse (s)));
3656 ("Requires clause of called function %q not satisfied%q (state is %q): %q",
3657 uentry_getName (le),
3658 sRef_isGlobalMarker (s)
3660 : message (" by %q", sRef_unparse (s)),
3661 stateValue_unparseValue (sRef_getMetaStateValue (s, key),
3663 stateClause_unparse (cl)),
3666 sRef_showAliasInfo (s);
3670 DPRINTF (("Error supressed!"));
3671 DPRINTF (("Loc: %s", fileloc_unparse (exprNode_loc (f))));
3672 DPRINTF (("Context supress: %s",
3673 bool_unparse (context_suppressFlagMsg (FLG_STATETRANSFER, exprNode_loc (f)))));
3677 } end_sRefSet_elements;
3681 sRefModVal modf = stateClause_getRequiresBodyFunction (cl);
3682 int eparam = stateClause_getStateParameter (cl);
3684 DPRINTF (("Reflect after clause: %s / %s",
3685 stateClause_unparse (cl),
3686 sRefSet_unparse (srs)));
3688 llassert (modf != NULL);
3690 sRefSet_elements (srs, sel)
3694 DPRINTF (("elements: %s", sRef_unparse (sel)));
3695 DPRINTF (("elements: %s", sRef_unparseFull (sel)));
3697 s = sRef_fixBaseParam (sel, args);
3699 DPRINTF (("elements: %s", sRef_unparse (s)));
3700 DPRINTF (("elements: %s", sRef_unparseFull (s)));
3702 if (sRef_isResult (sRef_getRootBase (sel)))
3704 ; /*@i423 what do we do about results */
3708 DPRINTF (("Reflecting state clause on: %s / %s",
3709 sRef_unparse (sel), sRef_unparse (s)));
3711 modf (s, eparam, exprNode_loc (f));
3713 } end_sRefSet_elements;
3716 sRefSet_free (osrs);
3718 } end_stateClauseList_elements ;
3723 static /*@only@*/ exprNode
3724 functionCallSafe (/*@only@*/ /*@notnull@*/ exprNode f,
3725 ctype t, /*@keep@*/ exprNodeList args)
3727 /* requires f is a non-error exprNode, with type function */
3728 cstring fname = exprNode_unparse (f);
3729 uentry le = exprNode_getUentry (f);
3730 exprNode ret = exprNode_createPartialCopy (f);
3735 DPRINTF (("Call: %s %s",exprNode_unparse (f), exprNodeList_unparse (args)));
3737 ret->typ = ctype_getReturnType (t);
3738 ret->kind = XPR_CALL;
3740 ret->edata = exprData_makeCall (f, args);
3743 ** Order of these steps is very important!
3745 ** Must check for argument dependencies before messing up uses and sets.
3748 if (context_getFlag (FLG_EVALORDER))
3750 exprNodeList_elements (args, current)
3752 if (exprNode_isDefined (current))
3754 exprNode_addUse (current, current->sref);
3756 } end_exprNodeList_elements;
3758 if (context_maybeSet (FLG_EVALORDER) || context_maybeSet (FLG_EVALORDERUNCON))
3760 checkSequencing (f, args);
3763 exprNodeList_elements (args, current)
3765 if (exprNode_isDefined (current) && sRef_isMeaningful (current->sref))
3767 exprNode_addUse (ret, sRef_makeDerived (current->sref));
3769 } end_exprNodeList_elements ;
3772 special = checkArgs (le, f, t, args, ret);
3773 checkGlobMods (f, le, args, ret, special);
3774 checkRequiresClause (le, f, args);
3777 if (uentry_isValid (le)
3778 && (uentry_isFunction (le)
3779 || (uentry_isVariable (le)
3780 && ctype_isFunction (uentry_getType (le)))))
3782 exitkind exk = uentry_getExitCode (le);
3784 /* f->typ is already set to the return type */
3786 DPRINTF (("Function: %s", uentry_unparseFull (le)));
3787 ret->sref = uentry_returnedRef (le, args, exprNode_loc (f));
3788 DPRINTF (("Returned: %s / %s",
3789 uentry_unparseFull (le),
3790 sRef_unparseFull (ret->sref)));
3792 if (uentry_isFunction (le) && exprNodeList_size (args) >= 1)
3794 qual nullPred = uentry_nullPred (le);
3796 if (qual_isTrueNull (nullPred))
3798 exprNode arg = exprNodeList_head (args);
3800 if (exprNode_isDefined (arg))
3802 ret->guards = guardSet_addFalseGuard (ret->guards, arg->sref);
3805 else if (qual_isFalseNull (nullPred))
3807 exprNode arg = exprNodeList_head (args);
3809 if (exprNode_isDefined (arg))
3811 ret->guards = guardSet_addTrueGuard (ret->guards, arg->sref);
3816 llassert (qual_isUnknown (nullPred));
3820 if (exitkind_isConditionalExit (exk))
3824 ** if (arg0) then { exit! } else { ; }
3826 ** if (arg0) then { ; } else { exit! }
3831 llassert (!exprNodeList_isEmpty (args));
3832 firstArg = exprNodeList_head (args);
3834 if (exprNode_isDefined (firstArg)
3835 && !guardSet_isEmpty (firstArg->guards))
3837 usymtab_trueBranch (guardSet_undefined);
3838 usymtab_altBranch (guardSet_undefined);
3840 if (exitkind_isTrueExit (exk))
3842 usymtab_popBranches (firstArg,
3843 exprNode_makeMustExit (),
3845 TRUE, TRUEEXITCLAUSE);
3849 usymtab_popBranches (firstArg,
3851 exprNode_makeMustExit (),
3852 TRUE, FALSEEXITCLAUSE);
3856 ret->exitCode = XK_MAYEXIT;
3858 else if (exitkind_mustExit (exk))
3860 ret->exitCode = XK_MUSTEXIT;
3862 else if (exitkind_couldExit (exk))
3864 ret->exitCode = XK_MAYEXIT;
3871 if (cstring_equalLit (fname, "exit"))
3873 if (exprNodeList_size (args) == 1)
3875 exprNode arg = exprNodeList_head (args);
3877 if (exprNode_isDefined (arg) && exprNode_knownIntValue (arg))
3879 long int val = multiVal_forceInt (exprNode_getValue (arg));
3886 ("Argument to exit has implementation defined behavior: %s",
3887 exprNode_unparse (arg)),
3888 exprNode_loc (arg));
3896 ret->sref = sRef_undefined;
3897 exprNode_checkSetAny (ret, uentry_rawName (le));
3900 DPRINTF (("Before reflect: %s", sRef_unparseFull (ret->sref)));
3901 DPRINTF (("Reflect: %s", uentry_unparseFull (le)));
3902 reflectEnsuresClause (ret, le, f, args);
3905 DPRINTF (("Here: %s", sRef_unparseFull (ret->sref)));
3910 ** this is yucky! should keep the uentry as part of exprNode!
3913 uentry exprNode_getUentry (exprNode e)
3915 if (exprNode_isError (e))
3917 return uentry_undefined;
3921 cstring s = exprNode_rootVarName (e);
3922 uentry ue = usymtab_lookupSafe (s);
3929 ** Returns true iff e1 and e2 are both exactly the same storage
3933 static bool exprNode_sameStorage (exprNode e1, exprNode e2)
3935 sRef s1 = exprNode_getSref (e1);
3936 sRef s2 = exprNode_getSref (e2);
3938 return (sRef_realSame (s1, s2));
3942 exprNode_makeInitBlock (lltok brace, /*@only@*/ exprNodeList inits)
3944 exprNode ret = exprNode_createPlain (ctype_unknown);
3946 ret->kind = XPR_INITBLOCK;
3947 ret->edata = exprData_makeCall (exprNode_undefined, inits);
3948 ret->loc = fileloc_update (ret->loc, lltok_getLoc (brace));
3954 exprNode_functionCall (/*@only@*/ exprNode f, /*@only@*/ exprNodeList args)
3959 usymtab_checkAllValid ();
3962 if (exprNode_isUndefined (f))
3965 exprNodeList_free (args);
3966 return exprNode_undefined;
3969 t = exprNode_getType (f);
3971 if (sRef_isLocalVar (f->sref))
3973 exprNode_checkUse (f, f->sref, f->loc);
3975 if (sRef_possiblyNull (f->sref))
3977 if (!usymtab_isGuarded (f->sref))
3979 if (optgenerror (FLG_NULLDEREF,
3980 message ("Function call using %s pointer %q",
3981 sRef_nullMessage (f->sref),
3982 sRef_unparse (f->sref)),
3985 sRef_showNullInfo (f->sref);
3986 sRef_setNullError (f->sref);
3994 if (ctype_isRealFunction (t))
3996 exprNode ret = functionCallSafe (f, t, args);
4000 else if (ctype_isUnknown (t))
4002 exprNode ret = exprNode_createPartialCopy (f);
4008 exprNodeList_elements (args, current)
4010 if (exprNode_isDefined (current))
4012 exprNode_checkUse (ret, current->sref, ret->loc);
4015 ** also, anything derivable from current->sref may be used
4018 exprNode_addUse (ret, sRef_makeDerived (current->sref));
4019 exprNode_mergeUSs (ret, current);
4021 } end_exprNodeList_elements;
4023 ret->edata = exprData_makeCall (f, args);
4024 ret->kind = XPR_CALL;
4026 tstring = cstring_copy (exprNode_unparse (f));
4028 cstring_markOwned (tstring);
4029 exprNode_checkSetAny (ret, tstring);
4035 voptgenerror (FLG_TYPE,
4036 message ("Call to non-function (type %t): %s", t,
4037 exprNode_unparse (f)),
4040 exprNodeList_free (args);
4042 return (exprNode_makeError ());
4047 exprNode_fieldAccessAux (/*@only@*/ exprNode s, /*@observer@*/ fileloc loc,
4048 /*@only@*/ cstring f)
4050 exprNode ret = exprNode_createPartialCopy (s);
4052 ret->kind = XPR_FACCESS;
4054 if (exprNode_isError (s))
4056 ret->edata = exprData_makeField (s, f);
4061 ctype t = exprNode_getType (s);
4062 ctype tr = ctype_realType (t);
4064 checkMacroParen (s);
4066 ret->edata = exprData_makeField (s, f);
4068 if (ctype_isStructorUnion (tr))
4070 uentry tf = uentryList_lookupField (ctype_getFields (tr), f);
4072 if (uentry_isUndefined (tf))
4074 voptgenerror (FLG_TYPE,
4075 message ("Access non-existent field %s of %t: %s", f, t,
4076 exprNode_unparse (ret)),
4078 /*! cstring_free (f); */ /* evans 2001-03-25 self-detect */
4083 uentry_setUsed (tf, exprNode_loc (ret));
4085 ret->typ = uentry_getType (tf);
4086 checkSafeUse (ret, s->sref);
4088 ret->sref = sRef_makeField (s->sref, uentry_rawName (tf));
4089 /*!? exprNode_free (s); */ /* evans 2001-03-25 self-detect */
4093 else /* isStructorUnion */
4095 if (ctype_isRealAbstract (tr))
4099 message ("Access field of abstract type (%t): %s.%s",
4100 t, exprNode_unparse (s), f),
4102 ret->typ = ctype_unknown;
4106 if (ctype_isKnown (tr))
4111 ("Access field of non-struct or union (%t): %s.%s",
4112 t, exprNode_unparse (s), f),
4115 ret->typ = ctype_unknown;
4119 cstring sn = cstring_copy (f);
4121 checkSafeUse (ret, s->sref);
4122 cstring_markOwned (sn);
4123 ret->sref = sRef_makeField (s->sref, sn);
4135 exprNode_fieldAccess (/*@only@*/ exprNode s, /*@only@*/ lltok dot,
4136 /*@only@*/ cstring f)
4138 exprNode res = exprNode_fieldAccessAux (s, lltok_getLoc (dot), f);
4144 exprNode_addParens (/*@only@*/ lltok lpar, /*@only@*/ exprNode e)
4146 exprNode ret = exprNode_createPartialCopy (e);
4148 ret->loc = fileloc_update (ret->loc, lltok_getLoc (lpar));
4149 ret->kind = XPR_PARENS;
4150 ret->edata = exprData_makeUop (e, lpar);
4152 if (!exprNode_isError (e))
4154 ret->exitCode = e->exitCode;
4155 ret->canBreak = e->canBreak;
4156 ret->mustBreak = e->mustBreak;
4157 ret->isJumpPoint = e->isJumpPoint;
4158 ret->sref = e->sref;
4165 exprNode_arrowAccessAux (/*@only@*/ exprNode s, /*@observer@*/ fileloc loc,
4166 /*@only@*/ cstring f)
4168 exprNode ret = exprNode_createPartialCopy (s);
4170 ret->edata = exprData_makeField (s, f);
4171 ret->kind = XPR_ARROW;
4173 if (exprNode_isError (s))
4179 ctype t = exprNode_getType (s);
4180 ctype tr = ctype_realType (t);
4182 checkMacroParen (s);
4184 (void) ctype_fixArrayPtr (tr); /* REWRITE THIS */
4186 if (ctype_isRealPointer (tr))
4188 ctype b = ctype_realType (ctype_baseArrayPtr (tr));
4190 if (ctype_isStructorUnion (b))
4192 uentry fentry = uentryList_lookupField (ctype_getFields (b), f);
4194 if (sRef_isKnown (s->sref) && sRef_possiblyNull (s->sref))
4196 if (!usymtab_isGuarded (s->sref) && !context_inProtectVars ())
4200 message ("Arrow access from %s pointer%q: %s",
4201 sRef_nullMessage (s->sref),
4202 sRef_unparsePreOpt (s->sref),
4203 exprNode_unparse (ret)),
4206 sRef_showNullInfo (s->sref);
4207 sRef_setNullError (s->sref);
4212 if (uentry_isUndefined (fentry))
4216 message ("Access non-existent field %s of %t: %s",
4217 f, t, exprNode_unparse (ret)),
4219 ret->typ = ctype_unknown;
4225 ** was safeUse: shouldn't be safe!
4228 ** rec must be defined,
4229 ** *rec must be allocated
4230 ** rec->field need only be defined it if is an rvalue
4233 uentry_setUsed (fentry, exprNode_loc (ret));
4234 ret->typ = uentry_getType (fentry);
4236 exprNode_checkUse (ret, s->sref, s->loc);
4238 /* exprNode_checkUse (ret, sRef_makePointer (s->sref), s->loc); */
4239 ret->sref = sRef_makeArrow (s->sref, uentry_rawName (fentry));
4243 else /* Pointer to something that is not a struct or union*/
4245 if (ctype_isRealAbstract (tr))
4247 ctype xrt = ctype_forceRealType (tr);
4251 message ("Arrow access field of abstract type (%t): %s->%s",
4252 t, exprNode_unparse (s), f),
4256 ** Set the state correctly, as if the abstraction is broken.
4259 if (ctype_isRealPointer (xrt) &&
4260 (b = ctype_realType (ctype_baseArrayPtr (xrt)),
4261 ctype_isStructorUnion (b)))
4263 uentry fentry = uentryList_lookupField (ctype_getFields (b), f);
4264 ret->typ = uentry_getType (fentry);
4265 ret->sref = sRef_makeArrow (s->sref, uentry_rawName (fentry));
4269 ret->typ = ctype_unknown;
4270 ret->sref = sRef_undefined;
4273 else /* not a struct, union or abstract */
4275 if (ctype_isUnknown (tr)) {
4276 cstring sn = cstring_copy (f);
4278 DPRINTF (("Here: %s", exprNode_unparse (s)));
4280 exprNode_checkUse (ret, s->sref, s->loc);
4281 exprNode_checkUse (ret, sRef_makePointer (s->sref), s->loc);
4283 cstring_markOwned (sn);
4284 ret->sref = sRef_makeArrow (s->sref, sn);
4286 ret->kind = XPR_ARROW;
4291 message ("Arrow access field of non-struct or union "
4292 "pointer (%t): %s->%s",
4293 t, exprNode_unparse (s), f),
4296 ret->typ = ctype_unknown;
4297 ret->sref = sRef_undefined;
4302 else /* its not a pointer */
4304 if (!ctype_isUnknown (tr))
4308 message ("Arrow access of non-pointer (%t): %s->%s",
4309 t, exprNode_unparse (s), f),
4312 ret->typ = ctype_unknown;
4313 ret->sref = sRef_undefined;
4317 cstring sn = cstring_copy (f);
4319 DPRINTF (("Here: %s", exprNode_unparse (s)));
4321 exprNode_checkUse (ret, s->sref, s->loc);
4322 exprNode_checkUse (ret, sRef_makePointer (s->sref), s->loc);
4324 cstring_markOwned (sn);
4325 ret->sref = sRef_makeArrow (s->sref, sn);
4327 ret->kind = XPR_ARROW;
4338 exprNode_arrowAccess (/*@only@*/ exprNode s,
4339 /*@only@*/ lltok arrow,
4340 /*@only@*/ cstring f)
4342 exprNode res = exprNode_arrowAccessAux (s, lltok_getLoc (arrow), f);
4348 ** only postOp's in C: i++ and i--
4352 exprNode_postOp (/*@only@*/ exprNode e, /*@only@*/ lltok op)
4354 /* check modification also */
4355 /* cstring opname = lltok_unparse (op);*/
4357 exprNode ret = exprNode_createPartialCopy (e);
4359 ret->loc = fileloc_update (ret->loc, lltok_getLoc (op));
4360 ret->kind = XPR_POSTOP;
4361 ret->edata = exprData_makeUop (e, op);
4363 if (!exprNode_isDefined (e))
4368 checkMacroParen (e);
4370 exprNode_checkUse (ret, e->sref, e->loc);
4371 exprNode_checkSet (ret, e->sref);
4373 t = exprNode_getType (e);
4375 if (sRef_isUnsafe (e->sref))
4377 voptgenerror (FLG_MACROPARAMS,
4378 message ("Operand of %s is macro parameter (non-functional): %s%s",
4379 lltok_unparse (op), exprNode_unparse (e), lltok_unparse (op)),
4381 sRef_makeSafe (e->sref);
4382 sRef_makeSafe (ret->sref);
4385 if (ctype_isForceRealNumeric (&t) || ctype_isRealAP (t))
4391 if (ctype_isRealAbstract (t))
4393 if (ctype_isRealNumAbstract (t)) {
4394 ; /* Allow operations on numabstract types */
4398 message ("Operand of %s is abstract type (%t): %s",
4399 lltok_unparse (op), t, exprNode_unparse (e)),
4407 message ("Operand of %s is non-numeric (%t): %s",
4408 lltok_unparse (op), t, exprNode_unparse (e)),
4411 ret->typ = ctype_unknown;
4414 /* if (ctype_isZero (t)) e->typ = ctype_int; */
4416 exprNode_checkModify (e, ret);
4418 /* added 7/11/2000 D.L */
4420 /*DRL 6/8/01 I decided to disable all Splint warnings here since the code
4421 probably needs a rewrite any way */
4426 /* updateEnvironmentForPostOp (e); */
4428 /* start modifications */
4429 /* added by Seejo on 4/16/2000 */
4431 /* Arithmetic operations on pointers wil modify the size/len/null terminated
4433 if ((sRef_isPossiblyNullTerminated (e->sref)) || (sRef_isNullTerminated(e->sref))) {
4435 ret->sref = sRef_copy (e->sref);
4438 if (lltok_getTok (op) == INC_OP) {
4439 if (sRef_getSize(e->sref) > 0) {
4441 sRef_setSize (ret->sref, sRef_getSize(e->sref) - 1);
4443 if (sRef_getLen(e->sref) == 1) { /* i.e. the first character is \0 */
4444 /* Assumption: there is only 1 \0 in the buffer */
4445 /* This will not be correct if there are 2 \0's in the buffer */
4446 sRef_setNotNullTerminatedState(ret->sref);
4447 sRef_resetLen(ret->sref);
4449 sRef_setNullTerminatedState(ret->sref);
4450 sRef_setLen (ret->sref, sRef_getLen(e->sref) - 1);
4452 if (sRef_isNullTerminated (ret->sref))
4453 printf ("ret->sref is Null Terminated\n");
4454 else if (sRef_isPossiblyNullTerminated (ret->sref))
4455 printf ("ret->sref is Possibly Null Terminated\n");
4456 else if (sRef_isNotNullTerminated (ret->sref))
4457 printf ("ret->sref is Not Null Terminated\n");
4462 if (lltok_getTok (op) == DEC_OP) {
4463 if (sRef_getSize(e->sref) >= 0) {
4464 sRef_setSize (ret->sref, sRef_getSize(e->sref) + 1);
4465 sRef_setLen (ret->sref, sRef_getLen(e->sref) + 1);
4470 /* end modifications */
4476 exprNode_preOp (/*@only@*/ exprNode e, /*@only@*/ lltok op)
4478 bool checkMod = FALSE;
4480 int opid = lltok_getTok (op);
4481 exprNode ret = exprNode_createSemiCopy (e);
4483 exprNode_copySets (ret, e);
4485 multiVal_free (ret->val);
4486 ret->val = multiVal_undefined;
4487 ret->loc = fileloc_update (ret->loc, lltok_getLoc (op));
4488 ret->kind = XPR_PREOP;
4489 ret->edata = exprData_makeUop (e, op);
4491 if (exprNode_isError (e))
4496 checkMacroParen (e);
4498 te = exprNode_getType (e);
4499 tr = ctype_realType (te);
4501 if (opid != TAMPERSAND)
4503 exprNode_checkUse (ret, e->sref, e->loc);
4505 if (ctype_isRealAbstract (tr)
4506 && (!(ctype_isRealBool (te) && (opid == TEXCL))))
4508 if (ctype_isRealNumAbstract (tr))
4510 ; /* no warning for numabstract types */
4514 if (optgenerror (FLG_ABSTRACT,
4515 message ("Operand of %s is abstract type (%t): %s",
4516 lltok_unparse (op), tr,
4517 exprNode_unparse (ret)),
4520 tr = te = ctype_unknown;
4521 ret->typ = ctype_unknown;
4522 sRef_setNullError (e->sref);
4531 case DEC_OP: /* should also check modification! */
4532 if (sRef_isMacroParamRef (e->sref))
4536 message ("Operand of %s is macro parameter (non-functional): %s",
4537 lltok_unparse (op), exprNode_unparse (ret)),
4542 exprNode_checkSet (ret, e->sref);
4545 if (ctype_isForceRealNumeric (&tr) || ctype_isRealAP (tr))
4550 if (context_msgStrictOps ())
4554 message ("Operand of %s is non-numeric (%t): %s",
4555 lltok_unparse (op), te, exprNode_unparse (ret)),
4558 ret->typ = ctype_int;
4561 /* start modifications */
4562 /* added by Seejo on 4/16/2000 */
4564 /* Arithmetic operations on pointers wil modify the size/len/null terminated
4566 if ((sRef_isPossiblyNullTerminated (e->sref))
4567 || (sRef_isNullTerminated(e->sref))) {
4568 ret->sref = sRef_copy (e->sref);
4571 if (lltok_getTok (op) == INC_OP) {
4572 if (sRef_getSize(e->sref) > 0) {
4574 sRef_setSize (ret->sref, sRef_getSize(e->sref) - 1);
4576 if (sRef_getLen(e->sref) == 1) { /* i.e. the first character is \0 */
4577 /* Assumption: there is only 1 \0 in the buffer */
4578 /* This will not be correct if there are 2 \0's in the buffer */
4579 sRef_setNotNullTerminatedState(ret->sref);
4580 sRef_resetLen (ret->sref);
4582 sRef_setNullTerminatedState(ret->sref);
4583 sRef_setLen (ret->sref, sRef_getLen(e->sref) - 1);
4589 if (lltok_getTok (op) == DEC_OP) {
4590 if (sRef_getSize(e->sref) >= 0) {
4591 sRef_setSize (ret->sref, sRef_getSize(e->sref) + 1);
4592 sRef_setLen (ret->sref, sRef_getLen(e->sref) + 1);
4597 /* end modifications */
4604 if (ctype_isForceRealNumeric (&tr))
4608 ret->val = multiVal_invert (exprNode_getValue (e));
4612 ret->val = multiVal_copy (exprNode_getValue (e));
4617 if (context_msgStrictOps ())
4621 message ("Operand of %s is non-numeric (%t): %s",
4622 lltok_unparse (op), te, exprNode_unparse (ret)),
4626 ret->typ = ctype_int;
4630 case TEXCL: /* maybe this should be restricted */
4631 guardSet_flip (ret->guards);
4633 if (ctype_isRealBool (te) || ctype_isUnknown (te))
4639 if (ctype_isRealPointer (tr))
4641 if (sRef_isKnown (e->sref))
4643 ret->guards = guardSet_addFalseGuard (ret->guards, e->sref);
4647 (FLG_BOOLOPS, FLG_PTRNEGATE,
4648 message ("Operand of %s is non-boolean (%t): %s",
4649 lltok_unparse (op), te, exprNode_unparse (ret)),
4656 message ("Operand of %s is non-boolean (%t): %s",
4657 lltok_unparse (op), te, exprNode_unparse (ret)),
4661 ret->typ = ctype_bool;
4666 if (ctype_isForceRealInt (&tr))
4671 if (context_msgStrictOps ())
4675 message ("Operand of %s is non-integer (%t): %s",
4676 lltok_unparse (op), te, exprNode_unparse (ret)),
4680 if (ctype_isInt (e->typ))
4686 ret->typ = ctype_int;
4692 ret->typ = ctype_makePointer (e->typ);
4694 if (sRef_isKnown (e->sref))
4696 ret->sref = sRef_makeAddress (e->sref);
4703 if (ctype_isAP (tr))
4705 ret->typ = ctype_baseArrayPtr (e->typ);
4709 if (ctype_isKnown (te))
4711 if (ctype_isFunction (te))
4717 message ("Dereference of function type (%t): %s",
4718 te, exprNode_unparse (ret)),
4723 voptgenerror (FLG_TYPE,
4724 message ("Dereference of non-pointer (%t): %s",
4725 te, exprNode_unparse (ret)),
4727 ret->typ = ctype_unknown;
4732 ret->typ = ctype_unknown;
4737 if (sRef_isKnown (e->sref))
4739 DPRINTF (("Checking possibly null: %s", sRef_unparseFull (e->sref)));
4741 if (sRef_possiblyNull (e->sref))
4743 DPRINTF (("Checking possibly null: %s", sRef_unparse (e->sref)));
4744 if (!usymtab_isGuarded (e->sref) && !context_inProtectVars ())
4748 message ("Dereference of %s pointer %q: %s",
4749 sRef_nullMessage (e->sref),
4750 sRef_unparse (e->sref),
4751 exprNode_unparse (ret)),
4754 sRef_showNullInfo (e->sref);
4755 sRef_setNotNull (e->sref, e->loc); /* suppress future messages */
4760 ret->sref = sRef_makePointer (e->sref);
4765 llbug (message ("exprNode_preOp: unhandled op: %s", lltok_unparse (op)));
4770 exprNode_checkModify (e, ret);
4777 ** any reason to disallow sizeof (abstract type) ?
4781 ** used by both sizeof
4785 ctype sizeof_resultType (void)
4787 static ctype sizet = ctype_unknown;
4789 if (ctype_isUnknown (sizet))
4791 if (usymtab_existsType (cstring_makeLiteralTemp ("size_t")))
4793 sizet = uentry_getAbstractType (usymtab_lookup (cstring_makeLiteralTemp ("size_t")));
4797 sizet = ctype_ulint;
4804 exprNode_sizeofType (/*@only@*/ qtype qt)
4806 exprNode ret = exprNode_create (sizeof_resultType ());
4807 ctype ct = qtype_getType (qt);
4809 ret->kind = XPR_SIZEOFT;
4810 ret->edata = exprData_makeSizeofType (qt);
4812 voptgenerror (FLG_SIZEOFTYPE,
4813 message ("Parameter to sizeof is type %s: %s",
4815 exprNode_unparse (ret)),
4822 exprNode_alignofType (/*@only@*/ qtype qt)
4824 exprNode ret = exprNode_create (sizeof_resultType ());
4825 ctype ct = qtype_getType (qt);
4827 ret->kind = XPR_ALIGNOFT;
4828 ret->edata = exprData_makeSizeofType (qt);
4830 voptgenerror (FLG_SIZEOFTYPE,
4831 message ("Parameter to alignof is type %s: %s",
4833 exprNode_unparse (ret)),
4839 exprNode exprNode_offsetof (qtype qt, cstringList s)
4841 exprNode ret = exprNode_create (sizeof_resultType ());
4842 ctype ct = qtype_getType (qt);
4844 ret->kind = XPR_OFFSETOF;
4845 ret->edata = exprData_makeOffsetof (qt, s);
4847 if (!ctype_isRealSU (ct))
4849 voptgenerror (FLG_TYPE,
4850 message ("First parameter to offsetof is not a "
4851 "struct or union type (type %s): %s",
4853 exprNode_unparse (ret)),
4860 cstringList_elements (s, el) {
4864 if (ctype_isUndefined (lt))
4868 else if (!ctype_isRealSU (lt))
4870 voptgenerror (FLG_TYPE,
4871 message ("Inner offsetof type is not a "
4872 "struct or union type (type %s before field %s): %s",
4873 ctype_unparse (lt), el,
4874 exprNode_unparse (ret)),
4880 fields = ctype_getFields (ctype_realType (lt));
4881 fld = uentryList_lookupField (fields, el);
4882 DPRINTF (("Try: %s / %s", ctype_unparse (lt), el));
4884 if (uentry_isUndefined (fld))
4886 if (ctype_equal (lt, ct)) {
4887 voptgenerror (FLG_TYPE,
4888 message ("Field %s in offsetof is not the "
4889 "name of a field of %s: %s",
4892 exprNode_unparse (ret)),
4895 voptgenerror (FLG_TYPE,
4896 message ("Deep field %s in offsetof is not the "
4897 "name of a field of %s: %s",
4900 exprNode_unparse (ret)),
4906 lt = uentry_getType (fld);
4909 } end_cstringList_elements;
4911 /* Should report error if its a bit field - behavior is undefined! */
4918 exprNode_sizeofExpr (/*@only@*/ exprNode e)
4922 if (exprNode_isUndefined (e))
4924 ret = exprNode_createLoc (ctype_unknown, fileloc_copy (g_currentloc));
4925 ret->edata = exprData_makeSingle (e);
4926 ret->typ = sizeof_resultType ();
4927 ret->kind = XPR_SIZEOF;
4931 uentry u = exprNode_getUentry (e);
4933 ret = exprNode_createPartialCopy (e);
4934 ret->edata = exprData_makeSingle (e);
4936 ret->typ = sizeof_resultType ();
4937 ret->kind = XPR_SIZEOF;
4939 if (uentry_isValid (u)
4940 && uentry_isRefParam (u)
4941 && ctype_isRealArray (uentry_getType (u)))
4944 (FLG_SIZEOFFORMALARRAY,
4945 message ("Parameter to sizeof is an array-type function parameter: %s",
4946 exprNode_unparse (ret)),
4952 ** sizeof (x) doesn't "really" use x
4959 exprNode_alignofExpr (/*@only@*/ exprNode e)
4963 if (exprNode_isUndefined (e))
4965 ret = exprNode_createLoc (ctype_unknown, fileloc_copy (g_currentloc));
4969 ret = exprNode_createPartialCopy (e);
4972 ret->edata = exprData_makeSingle (e);
4973 ret->typ = sizeof_resultType ();
4974 ret->kind = XPR_ALIGNOF;
4977 ** sizeof (x) doesn't "really" use x
4984 exprNode_cast (/*@only@*/ lltok tok, /*@only@*/ exprNode e, /*@only@*/ qtype q)
4990 if (exprNode_isError (e))
4994 return exprNode_undefined;
4997 checkMacroParen (e);
4999 c = qtype_getType (q);
5000 t = exprNode_getType (e);
5002 ret = exprNode_createPartialCopy (e);
5004 ret->loc = fileloc_update (ret->loc, lltok_getLoc (tok));
5006 ret->kind = XPR_CAST;
5007 ret->edata = exprData_makeCast (tok, e, q);
5009 ret->sref = sRef_copy (e->sref);
5011 DPRINTF (("Cast 2: -> %s", sRef_unparseFull (ret->sref)));
5013 if (!sRef_isConst (e->sref))
5015 usymtab_addForceMustAlias (ret->sref, e->sref);
5018 DPRINTF (("Cast 2: -> %s", sRef_unparseFull (ret->sref)));
5019 sRef_setTypeFull (ret->sref, c);
5020 DPRINTF (("Cast 2: -> %s", sRef_unparseFull (ret->sref)));
5026 ** void * <-> abstract * (if FLG_ABSTVOIDP)
5027 ** abstract * <-> void * (if FLG_ABSTVOIDP)
5030 if (ctype_isVoid (c)) /* cast to void is always okay --- discard value */
5032 /* evans 2002-07-19: added this warning */
5033 DPRINTF (("Checking: %s / %s", exprNode_unparse (ret), sRef_unparseFull (ret->sref)));
5034 if (sRef_isFresh (ret->sref))
5038 message ("New fresh storage %q(type %s) cast to void (not released): %s",
5039 sRef_unparseOpt (ret->sref),
5040 ctype_unparse (exprNode_getType (ret)),
5041 exprNode_unparse (ret)),
5042 exprNode_loc (ret));
5045 else if (ctype_isRealAP (c)) /* casting to array or pointer */
5047 ctype bc = ctype_getBaseType (c);
5048 ctype bt = ctype_getBaseType (t);
5049 ctype rt = ctype_realType (t);
5051 if (ctype_isFunction (ctype_baseArrayPtr (ctype_realType (c)))
5052 && (ctype_isArrayPtr (rt)
5053 && !ctype_isFunction (ctype_realType (ctype_baseArrayPtr (rt)))))
5057 message ("Cast from function pointer type (%t) to "
5058 "non-function pointer (%t): %s",
5059 c, t, exprNode_unparse (ret)),
5063 if (!ctype_isFunction (ctype_baseArrayPtr (c))
5064 && (ctype_isArrayPtr (rt)
5065 && ctype_isFunction (ctype_realType (ctype_baseArrayPtr (rt)))))
5069 message ("Cast from non-function pointer type (%t) to "
5070 "function pointer (%t): %s",
5071 c, t, exprNode_unparse (ret)),
5075 if (exprNode_isZero (e) && context_getFlag (FLG_ZEROPTR) &&
5076 !(ctype_isRealAbstract (bc)
5077 && context_hasAccess (ctype_typeId (bc))))
5079 ; /* okay to cast zero */
5083 if (ctype_isRealAbstract (bc)
5084 && !context_hasAccess (ctype_typeId (bc)))
5086 if (ctype_isVoidPointer (t) || ctype_isUnknown (t))
5090 message ("Cast to underlying abstract type %t: %s",
5091 c, exprNode_unparse (ret)),
5098 message ("Cast to underlying abstract type %t: %s",
5099 c, exprNode_unparse (ret)),
5104 if (ctype_isRealAbstract (bt)
5105 && !context_hasAccess (ctype_typeId (bt)))
5107 if (ctype_isUnknown (c) || ctype_isVoidPointer (c))
5111 message ("Cast from underlying abstract type %t: %s",
5112 t, exprNode_unparse (ret)),
5119 message ("Cast from underlying abstract type %t: %s",
5120 t, exprNode_unparse (ret)),
5128 ctype bt = ctype_realType (ctype_getBaseType (t));
5129 ctype bc = ctype_realType (ctype_getBaseType (c));
5131 if (ctype_isAbstract (bt) && !context_hasAccess (ctype_typeId (bt)))
5133 if (ctype_match (c, t))
5135 if (ctype_equal (c, t))
5139 message ("Redundant cast involving abstract type %t: %s",
5140 bt, exprNode_unparse (ret)),
5148 message ("Cast from abstract type %t: %s",
5149 bt, exprNode_unparse (ret)),
5154 if (ctype_isAbstract (bc)
5155 && !context_hasAccess (ctype_typeId (bc)))
5157 if (ctype_match (c, t))
5163 if (ctype_isNumAbstract (bc))
5165 if (exprNode_isNumLiteral (e))
5168 (FLG_NUMABSTRACTCAST,
5169 message ("Cast from literal to numabstract type %t: %s", bc,
5170 exprNode_unparse (ret)),
5177 message ("Cast to numabstract type %t: %s", bc,
5178 exprNode_unparse (ret)),
5184 DPRINTF (("No access to: %s / %d",
5185 ctype_unparse (bc), ctype_typeId (bc)));
5186 DPRINTF (("Context %s %s",
5187 bool_unparse (context_inFunctionLike ()),
5188 context_unparse ()));
5191 message ("Cast to abstract type %t: %s", bc,
5192 exprNode_unparse (ret)),
5199 if (ctype_isAbstract (c))
5201 if (sRef_isExposed (e->sref) || sRef_isOnly (e->sref))
5203 /* okay, cast exposed to abstract */
5204 sRef_clearExKindComplete (ret->sref, fileloc_undefined);
5208 if (ctype_isVisiblySharable (t)
5209 && sRef_isExternallyVisible (e->sref)
5210 && !(ctype_isAbstract (t)
5211 && context_hasAccess (ctype_typeId (t))))
5215 message ("Cast to abstract type from externally visible "
5216 "mutable storage exposes rep of %s: %s",
5218 exprNode_unparse (e)),
5228 evaluationOrderUndefined (lltok op)
5230 int opid = lltok_getTok (op);
5232 return (opid != AND_OP && opid != OR_OP);
5235 static bool checkIntegral (/*@notnull@*/ exprNode e1,
5236 /*@notnull@*/ exprNode e2,
5237 /*@notnull@*/ exprNode ret,
5242 ctype te1 = exprNode_getType (e1);
5243 ctype te2 = exprNode_getType (e2);
5245 ctype tr1 = ctype_realishType (te1);
5246 ctype tr2 = ctype_realishType (te2);
5248 if (ctype_isForceRealInt (&tr1) && ctype_isForceRealInt (&tr2))
5254 if (context_msgStrictOps ())
5256 if (!ctype_isInt (tr1) && !ctype_isInt (tr2))
5258 if (ctype_sameName (te1, te2))
5262 message ("Operands of %s are non-integer (%t): %s",
5263 lltok_unparse (op), te1,
5264 exprNode_unparse (ret)),
5271 message ("Operands of %s are non-integers (%t, %t): %s",
5272 lltok_unparse (op), te1, te2,
5273 exprNode_unparse (ret)),
5277 else if (!ctype_isInt (tr1))
5281 message ("Left operand of %s is non-integer (%t): %s",
5282 lltok_unparse (op), te1, exprNode_unparse (ret)),
5286 /* !ctype_isInt (te2) */
5290 message ("Right operand of %s is non-integer (%t): %s",
5291 lltok_unparse (op), te2, exprNode_unparse (ret)),
5301 ** returns exprNode representing e1 op e2
5303 ** uses msg if there are errors
5304 ** can be used for both assignment ops and regular ops
5309 static /*@only@*/ /*@notnull@*/ exprNode
5310 exprNode_makeOp (/*@keep@*/ exprNode e1, /*@keep@*/ exprNode e2,
5311 /*@keep@*/ lltok op)
5313 ctype te1, te2, tr1, tr2, tret;
5314 int opid = lltok_getTok (op);
5315 bool hasError = FALSE;
5318 if (exprNode_isError (e1))
5320 ret = exprNode_createPartialNVCopy (e2);
5324 ret = exprNode_createPartialNVCopy (e1);
5327 ret->val = multiVal_undefined;
5330 ret->edata = exprData_makeOp (e1, e2, op);
5332 if (exprNode_isError (e1) || exprNode_isError (e2))
5334 if (opid == TLT || opid == TGT || opid == LE_OP || opid == GE_OP
5335 || opid == EQ_OP || opid == NE_OP
5336 || opid == AND_OP || opid == OR_OP)
5338 ret->typ = ctype_bool;
5341 if (exprNode_isDefined (e1))
5343 exprNode_checkUse (ret, e1->sref, e1->loc);
5346 if (exprNode_isDefined (e2))
5348 exprNode_mergeUSs (ret, e2);
5349 exprNode_checkUse (ret, e2->sref, e2->loc);
5355 tret = ctype_unknown;
5356 te1 = exprNode_getType (e1);
5358 DPRINTF (("te1 = %s / %s", exprNode_unparse (e1), ctype_unparse (te1)));
5360 te2 = exprNode_getType (e2);
5362 tr1 = ctype_realishType (te1);
5363 tr2 = ctype_realishType (te2);
5367 ret->guards = guardSet_or (ret->guards, e2->guards);
5369 else if (opid == AND_OP)
5371 ret->guards = guardSet_and (ret->guards, e2->guards);
5378 if (opid == EQ_OP || opid == NE_OP)
5380 exprNode temp1 = e1, temp2 = e2;
5382 /* could do NULL == x */
5384 if (exprNode_isNullValue (e1) || exprNode_isUnknownConstant (e1))
5386 temp1 = e2; temp2 = e1;
5389 if (exprNode_isNullValue (temp2) || exprNode_isUnknownConstant (temp2))
5391 reflectNullTest (temp1, (opid == NE_OP));
5392 guardSet_free (ret->guards);
5393 ret->guards = guardSet_copy (temp1->guards);
5397 if (opid == TLT || opid == TGT || opid == LE_OP || opid == GE_OP
5398 || opid == EQ_OP || opid == NE_OP || opid == AND_OP || opid == OR_OP)
5403 if (anyAbstract (tr1, tr2) &&
5404 (!((ctype_isRealBool (te1) || ctype_isRealBool (te2)) &&
5405 (opid == AND_OP || opid == OR_OP
5406 || opid == EQ_OP || opid == NE_OP))))
5408 if (abstractOpError (tr1, tr2, op, e1, e2, e1->loc, e2->loc))
5410 tret = ctype_unknown;
5415 if (ctype_isUnknown (te1) || ctype_isUnknown (te2))
5417 /* unknown types, no comparisons possible */
5423 case TMULT: /* multiplication and division: */
5425 case MUL_ASSIGN: /* numeric, numeric -> numeric */
5426 case DIV_ASSIGN: /* */
5427 if (opid == TMULT || opid == MUL_ASSIGN)
5429 ret->val = multiVal_multiply (exprNode_getValue (e1),
5430 exprNode_getValue (e2));
5434 ret->val = multiVal_divide (exprNode_getValue (e1),
5435 exprNode_getValue (e2));
5438 tret = checkNumerics (tr1, tr2, te1, te2, e1, e2, op);
5441 case TPLUS: /* addition and subtraction: */
5442 case TMINUS: /* pointer, int -> pointer */
5443 case SUB_ASSIGN: /* int, pointer -> pointer */
5444 case ADD_ASSIGN: /* numeric, numeric -> numeric */
5445 if (opid == TPLUS || opid == ADD_ASSIGN)
5447 ret->val = multiVal_add (exprNode_getValue (e1),
5448 exprNode_getValue (e2));
5452 ret->val = multiVal_subtract (exprNode_getValue (e1),
5453 exprNode_getValue (e2));
5456 tr1 = ctype_fixArrayPtr (tr1);
5458 if ((ctype_isRealPointer (tr1) && !exprNode_isNullValue (e1))
5459 && (!ctype_isRealPointer (tr2) && ctype_isRealInt (tr2)))
5463 if (context_msgPointerArith ())
5467 message ("Pointer arithmetic (%t, %t): %s",
5468 te1, te2, exprNode_unparse (ret)),
5473 ** Swap terms so e1 is always the pointer
5476 if (ctype_isRealPointer (tr1))
5482 exprNode_swap (e1, e2);
5485 if (sRef_possiblyNull (e1->sref)
5486 && !usymtab_isGuarded (e1->sref))
5489 (FLG_NULLPOINTERARITH,
5490 message ("Pointer arithmetic involving possibly "
5491 "null pointer %s: %s",
5492 exprNode_unparse (e1),
5493 exprNode_unparse (ret)),
5497 ret->sref = sRef_copy (e1->sref);
5499 /* start modifications */
5500 /* added by Seejo on 4/16/2000 */
5502 /* Arithmetic operations on pointers wil modify the size/len/null terminated
5504 if ((sRef_isPossiblyNullTerminated (e1->sref)) || (sRef_isNullTerminated(e1->sref))) {
5507 added ugly fixed to stop
5508 program from crashing on point + int +int
5509 one day I'll fix this or ask Seejo wtf the codes supposed to do. */
5511 if (!multiVal_isInt (e2->val) )
5515 val = (int) multiVal_forceInt (e2->val);
5517 /* Operator : + or += */
5518 if ((lltok_getTok (op) == TPLUS) || (lltok_getTok(op) == ADD_ASSIGN)) {
5519 if (sRef_getSize(e1->sref) >= val) {/* Incrementing the pointer by
5520 val should not result in a
5521 size < 0 (size = 0 is ok !) */
5523 sRef_setSize (ret->sref, sRef_getSize(e1->sref) - val);
5525 if (sRef_getLen(e1->sref) == val) { /* i.e. the character at posn val is \0 */
5526 sRef_setNotNullTerminatedState(ret->sref);
5527 sRef_resetLen (ret->sref);
5529 sRef_setNullTerminatedState(ret->sref);
5530 sRef_setLen (ret->sref, sRef_getLen(e1->sref) - val);
5535 /* Operator : - or -= */
5536 if ((lltok_getTok (op) == TMINUS) || (lltok_getTok (op) == SUB_ASSIGN)) {
5537 if (sRef_getSize(e1->sref) >= 0) {
5538 sRef_setSize (ret->sref, sRef_getSize(e1->sref) + val);
5539 sRef_setLen (ret->sref, sRef_getLen(e1->sref) + val);
5544 /* end modifications */
5546 sRef_setNullError (ret->sref);
5549 ** Fixed for 2.2c: the alias state of ptr + int is dependent,
5550 ** since is points to storage that should not be deallocated
5551 ** through this pointer.
5554 if (sRef_isOnly (ret->sref)
5555 || sRef_isFresh (ret->sref))
5557 sRef_setAliasKind (ret->sref, AK_DEPENDENT, exprNode_loc (ret));
5562 else if ((!ctype_isRealPointer(tr1) && ctype_isRealInt (tr1))
5563 && (ctype_isRealPointer (tr2) && !exprNode_isNullValue (e2)))
5565 if (context_msgPointerArith ())
5569 message ("Pointer arithmetic (%t, %t): %s",
5570 te1, te2, exprNode_unparse (ret)),
5574 if (sRef_possiblyNull (e1->sref)
5575 && !usymtab_isGuarded (e1->sref))
5578 (FLG_NULLPOINTERARITH,
5579 message ("Pointer arithmetic involving possibly "
5580 "null pointer %s: %s",
5581 exprNode_unparse (e2),
5582 exprNode_unparse (ret)),
5586 ret->sref = sRef_copy (e2->sref);
5588 /* start modifications */
5589 /* added by Seejo on 4/16/2000 */
5591 /* Arithmetic operations on pointers wil modify the size/len/null terminated
5594 if ((sRef_isPossiblyNullTerminated (e2->sref)) || (sRef_isNullTerminated(e2->sref))) {
5595 int val = (int) multiVal_forceInt (e1->val);
5597 /* Operator : + or += */
5598 if ((lltok_getTok (op) == TPLUS) || (lltok_getTok(op) == ADD_ASSIGN)) {
5599 if (sRef_getSize(e2->sref) >= val) {/* Incrementing the pointer by
5600 val should not result in a
5601 size < 0 (size = 0 is ok !) */
5603 sRef_setSize (ret->sref, sRef_getSize(e2->sref) - val);
5605 if (sRef_getLen(e2->sref) == val) { /* i.e. the character at posn val is \0 */
5606 sRef_setNotNullTerminatedState(ret->sref);
5607 sRef_resetLen (ret->sref);
5609 sRef_setNullTerminatedState(ret->sref);
5610 sRef_setLen (ret->sref, sRef_getLen(e2->sref) - val);
5615 /* Operator : - or -= */
5616 if ((lltok_getTok (op) == TMINUS) || (lltok_getTok (op) == SUB_ASSIGN)) {
5617 if (sRef_getSize(e2->sref) >= 0) {
5618 sRef_setSize (ret->sref, sRef_getSize(e2->sref) + val);
5619 sRef_setLen (ret->sref, sRef_getLen(e2->sref) + val);
5623 /* end modifications */
5625 sRef_setNullError (ret->sref);
5628 ** Fixed for 2.2c: the alias state of ptr + int is dependent,
5629 ** since is points to storage that should not be deallocated
5630 ** through this pointer.
5633 if (sRef_isOnly (ret->sref)
5634 || sRef_isFresh (ret->sref)) {
5635 sRef_setAliasKind (ret->sref, AK_DEPENDENT, exprNode_loc (ret));
5639 ret->sref = e2->sref;
5643 tret = checkNumerics (tr1, tr2, te1, te2, e1, e2, op);
5652 case TAMPERSAND: /* bitwise & */
5654 case TCIRC: /* ^ (XOR) */
5659 bool reported = FALSE;
5665 if (opid == LEFT_OP || opid == LEFT_ASSIGN
5666 || opid == RIGHT_OP || opid == RIGHT_ASSIGN)
5669 ** evans 2002-01-01: fixed this to follow ISO 6.5.7.
5672 if (!ctype_isUnsigned (tr2)
5673 && !exprNode_isNonNegative (e2))
5675 reported = optgenerror
5677 message ("Right operand of %s may be negative (%t): %s",
5678 lltok_unparse (op), te2,
5679 exprNode_unparse (ret)),
5683 if (!ctype_isUnsigned (tr1)
5684 && !exprNode_isNonNegative (e1))
5686 reported = optgenerror
5687 (FLG_SHIFTIMPLEMENTATION,
5688 message ("Left operand of %s may be negative (%t): %s",
5689 lltok_unparse (op), te1,
5690 exprNode_unparse (ret)),
5695 ** Should check size of right operand also...
5701 if (!ctype_isUnsigned (tr1))
5703 if (exprNode_isNonNegative (e1)) {
5706 reported = optgenerror
5708 message ("Left operand of %s is not unsigned value (%t): %s",
5709 lltok_unparse (op), te1,
5710 exprNode_unparse (ret)),
5720 if (!ctype_isUnsigned (tr2))
5722 if (!exprNode_isNonNegative (e2)) {
5723 reported = optgenerror
5725 message ("Right operand of %s is not unsigned value (%t): %s",
5726 lltok_unparse (op), te2,
5727 exprNode_unparse (ret)),
5736 if (!checkIntegral (e1, e2, ret, op)) {
5737 te1 = ctype_unknown;
5741 DPRINTF (("Set: %s", ctype_unparse (te1)));
5744 ** tret is the widest type of te1 and te2
5747 tret = ctype_widest (te1, te2);
5752 if (checkIntegral (e1, e2, ret, op)) {
5755 tret = ctype_unknown;
5760 case TLT: /* comparisons */
5761 case TGT: /* numeric, numeric -> bool */
5763 DPRINTF (("Here we go: %s / %s",
5764 ctype_unparse (tr1), ctype_unparse (tr2)));
5766 if ((ctype_isReal (tr1) && !ctype_isInt (tr1))
5767 || (ctype_isReal (tr2) && !ctype_isInt (tr2)))
5770 bool fepsilon = FALSE;
5772 if (!ctype_isReal (rtype) || ctype_isInt (rtype))
5777 if (opid == TLT || opid == TGT)
5779 uentry ue1 = exprNode_getUentry (e1);
5780 uentry ue2 = exprNode_getUentry (e2);
5783 ** FLT_EPSILON, etc. really is a variable, not
5787 if (uentry_isVariable (ue1))
5789 cstring uname = uentry_rawName (ue1);
5791 if (cstring_equalLit (uname, "FLT_EPSILON")
5792 || cstring_equalLit (uname, "DBL_EPSILON")
5793 || cstring_equalLit (uname, "LDBL_EPSILON"))
5799 if (uentry_isVariable (ue2))
5801 cstring uname = uentry_rawName (ue2);
5803 if (cstring_equalLit (uname, "FLT_EPSILON")
5804 || cstring_equalLit (uname, "DBL_EPSILON")
5805 || cstring_equalLit (uname, "LDBL_EPSILON"))
5814 ; /* Don't complain. */
5820 message ("Dangerous comparison involving %s types: %s",
5821 ctype_unparse (rtype),
5822 exprNode_unparse (ret)),
5831 ** Types should match.
5834 DPRINTF (("Match types: %s / %s", exprNode_unparse (e1),
5835 exprNode_unparse (e2)));
5837 if (!exprNode_matchTypes (e1, e2))
5839 hasError = gentypeerror
5841 message ("Operands of %s have incompatible types (%t, %t): %s",
5842 lltok_unparse (op), te1, te2, exprNode_unparse (ret)),
5848 || (ctype_isForceRealNumeric (&tr1)
5849 && ctype_isForceRealNumeric (&tr2)) ||
5850 (ctype_isRealPointer (tr1) && ctype_isRealPointer (tr2)))
5856 if ((ctype_isRealNumeric (tr1) && ctype_isRealPointer (tr2)) ||
5857 (ctype_isRealPointer (tr1) && ctype_isRealNumeric (tr2)))
5861 message ("Comparison of pointer and numeric (%t, %t): %s",
5862 te1, te2, exprNode_unparse (ret)),
5867 (void) checkNumerics (tr1, tr2, te1, te2, e1, e2, op);
5872 /* certain comparisons on unsigned's and zero look suspicious */
5874 if (opid == TLT || opid == LE_OP || opid == GE_OP)
5876 if ((ctype_isUnsigned (tr1) && exprNode_isZero (e2))
5877 || (ctype_isUnsigned (tr2) && exprNode_isZero (e1)))
5880 (FLG_UNSIGNEDCOMPARE,
5881 message ("Comparison of unsigned value involving zero: %s",
5882 exprNode_unparse (ret)),
5887 /* EQ_OP should NOT be used with booleans (unless one is FALSE) */
5889 if ((opid == EQ_OP || opid == NE_OP) &&
5890 ctype_isDirectBool (tr1) && ctype_isDirectBool (tr2))
5893 ** is one a variable?
5896 if (uentry_isVariable (exprNode_getUentry (e1))
5897 || uentry_isVariable (exprNode_getUentry (e2)))
5900 ** comparisons with FALSE are okay
5903 if (exprNode_isFalseConstant (e1)
5904 || exprNode_isFalseConstant (e2))
5913 ("Use of %q with %s variables (risks inconsistency because "
5914 "of multiple true values): %s",
5915 cstring_makeLiteral ((opid == EQ_OP) ? "==" : "!="),
5916 context_printBoolName (), exprNode_unparse (ret)),
5923 case AND_OP: /* bool, bool -> bool */
5925 if (ctype_isForceRealBool (&tr1) && ctype_isForceRealBool (&tr2))
5931 if (context_maybeSet (FLG_BOOLOPS))
5933 if (!ctype_isRealBool (te1) && !ctype_isRealBool (te2))
5935 if (ctype_sameName (te1, te2))
5939 message ("Operands of %s are non-boolean (%t): %s",
5940 lltok_unparse (op), te1,
5941 exprNode_unparse (ret)),
5949 ("Operands of %s are non-booleans (%t, %t): %s",
5950 lltok_unparse (op), te1, te2, exprNode_unparse (ret)),
5954 else if (!ctype_isRealBool (te1))
5958 message ("Left operand of %s is non-boolean (%t): %s",
5959 lltok_unparse (op), te1, exprNode_unparse (ret)),
5962 else if (!ctype_isRealBool (te2))
5966 message ("Right operand of %s is non-boolean (%t): %s",
5967 lltok_unparse (op), te2, exprNode_unparse (ret)),
5980 (cstring_makeLiteral
5981 ("There has been a problem in the parser. This is believed to result "
5982 "from a problem with bison v. 1.25. Please try rebuidling Splint "
5983 "using the pre-compiled grammar files by commenting out the "
5984 "BISON= line in the top-level Makefile."));
5989 DPRINTF (("Return type %s: %s", exprNode_unparse (ret), ctype_unparse (tret)));
5991 exprNode_checkUse (ret, e1->sref, e1->loc);
5992 exprNode_mergeUSs (ret, e2);
5993 exprNode_checkUse (ret, e2->sref, e2->loc);
5999 exprNode_op (/*@only@*/ exprNode e1, /*@keep@*/ exprNode e2,
6000 /*@only@*/ lltok op)
6004 checkMacroParen (e1);
6005 checkMacroParen (e2);
6007 if (evaluationOrderUndefined (op) && context_maybeSet (FLG_EVALORDER))
6009 checkExpressionDefined (e1, e2, op);
6012 ret = exprNode_makeOp (e1, e2, op);
6017 void exprNode_checkAssignMod (exprNode e1, exprNode ret)
6020 ** This is somewhat bogus!
6022 ** Assigning to a nested observer in a non-observer datatype
6023 ** should not produce an error.
6026 sRef ref = exprNode_getSref (e1);
6028 DPRINTF (("Check assign mod: %s",
6029 sRef_unparseFull (ref)));
6031 if (sRef_isObserver (ref)
6032 || ((sRef_isFileStatic (ref) || sRef_isFileOrGlobalScope (ref))
6033 && ctype_isArray (ctype_realType (sRef_getType (ref)))))
6035 sRef base = sRef_getBase (ref);
6037 if (sRef_isValid (base) && sRef_isObserver (base))
6039 exprNode_checkModify (e1, ret);
6043 exprNode_checkModifyVal (e1, ret);
6048 exprNode_checkModify (e1, ret);
6053 exprNode_assign (/*@only@*/ exprNode e1, /*@only@*/ exprNode e2, /*@only@*/ lltok op)
6055 bool isalloc = FALSE;
6056 bool isjustalloc = FALSE;
6057 bool noalias = FALSE;
6060 DPRINTF (("%s [%s] <- %s [%s]",
6061 exprNode_unparse (e1),
6062 ctype_unparse (e1->typ),
6063 exprNode_unparse (e2),
6064 ctype_unparse (e2->typ)));
6066 if (lltok_getTok (op) != TASSIGN)
6068 ret = exprNode_makeOp (e1, e2, op);
6070 DPRINTF (("Here goes: %s %s",
6071 ctype_unparse (e1->typ),
6072 ctype_unparse (e2->typ)));
6074 if (exprNode_isDefined (e1)
6075 && exprNode_isDefined (e2))
6077 if (ctype_isNumeric (e2->typ)
6078 || ctype_isNumeric (e1->typ))
6080 /* Its a pointer arithmetic expression like ptr += i */
6087 ret = exprNode_createPartialCopy (e1);
6088 ret->kind = XPR_ASSIGN;
6089 ret->edata = exprData_makeOp (e1, e2, op);
6091 if (!exprNode_isError (e2))
6093 ret->sets = sRefSet_union (ret->sets, e2->sets);
6094 ret->msets = sRefSet_union (ret->msets, e2->msets);
6095 ret->uses = sRefSet_union (ret->uses, e2->uses);
6099 checkExpressionDefined (e1, e2, op);
6101 if (exprNode_isError (e1))
6103 if (!exprNode_isError (e2))
6105 ret->loc = fileloc_update (ret->loc, e2->loc);
6109 ret->loc = fileloc_update (ret->loc, g_currentloc);
6113 if (!exprNode_isError (e2))
6115 checkMacroParen (e2);
6118 if (exprNode_isDefined (e1))
6120 if (sRef_isMacroParamRef (e1->sref))
6122 if (context_inIterDef ())
6124 uentry ue = sRef_getUentry (e1->sref);
6126 if (uentry_isYield (ue))
6132 if (fileloc_isDefined (e1->loc))
6136 message ("Assignment to non-yield iter parameter: %q",
6137 sRef_unparse (e1->sref)),
6144 message ("Assignment to non-yield iter parameter: %q",
6145 sRef_unparse (e1->sref)),
6152 if (fileloc_isDefined (e1->loc))
6156 message ("Assignment to macro parameter: %q",
6157 sRef_unparse (e1->sref)),
6164 message ("Assignment to macro parameter: %q",
6165 sRef_unparse (e1->sref)),
6169 exprNode_checkAssignMod (e1, ret); /* evans 2001-07-22 */
6174 exprNode_checkAssignMod (e1, ret);
6177 if (exprNode_isDefined (e2))
6179 if (lltok_getTok (op) == TASSIGN)
6181 ctype te1 = exprNode_getType (e1);
6182 ctype te2 = exprNode_getType (e2);
6184 if (ctype_isVoid (te2))
6188 message ("Assignment of void value to %t: %s %s %s",
6189 te1, exprNode_unparse (e1),
6191 exprNode_unparse (e2)),
6194 else if (!ctype_forceMatch (te1, te2))
6196 if (exprNode_matchLiteral (te1, e2))
6198 DPRINTF (("Literals match: %s / %s",
6199 ctype_unparse (te1), exprNode_unparse (e2)));
6200 if (ctype_isNumAbstract (te1)) {
6201 if (!context_flagOn (FLG_NUMABSTRACTLIT, e1->loc)) {
6202 (void) llgenhinterror
6205 ("Assignment of %t literal to numabstract type %t: %s %s %s",
6207 exprNode_unparse (e1),
6209 exprNode_unparse (e2)),
6211 ("Use +numabstractlit to allow numeric literals to be used as numabstract values"),
6220 message ("Assignment of %t to %t: %s %s %s",
6221 te2, te1, exprNode_unparse (e1),
6223 exprNode_unparse (e2)),
6229 /* Type checks okay */
6233 exprNode_mergeUSs (ret, e2);
6234 exprNode_checkUse (ret, e2->sref, e2->loc);
6236 DPRINTF (("Do assign! %s %s", exprNode_unparse (e1), exprNode_unparse (e2)));
6243 doAssign (e1, e2, FALSE);
6246 ret->sref = e1->sref;
6250 if (exprNode_isDefined (e2))
6252 exprNode_mergeUSs (ret, e2);
6253 exprNode_checkUse (ret, e2->sref, e2->loc);
6257 if (sRef_isPointer (e1->sref) && !sRef_isMacroParamRef (e1->sref))
6259 exprNode_checkUse (ret, sRef_getBase (e1->sref), e1->loc);
6262 isjustalloc = sRef_isJustAllocated (e1->sref);
6263 isalloc = sRef_isAllocated (e1->sref);
6265 if (sRef_isField (e1->sref))
6267 sRef root = sRef_getRootBase (sRef_getBase (e1->sref));
6269 if (!sRef_isAllocated (root) && !sRef_isMacroParamRef (root))
6271 exprNode_checkUse (ret, root, e1->loc);
6277 ** be careful! this defines e1->sref.
6280 /* evans 2001-07-22: removed if (!sRef_isMacroParamRef (e1->sref)) */
6282 DPRINTF (("Setting: %s -> %s", exprNode_unparse (ret), sRef_unparse (e1->sref)));
6283 exprNode_checkSet (ret, e1->sref);
6287 sRef_setAllocatedComplete (e1->sref, exprNode_isDefined (e2)
6288 ? e2->loc : e1->loc);
6294 sRef_setAllocatedShallowComplete (e1->sref, exprNode_loc (e2));
6303 exprNode_cond (/*@keep@*/ exprNode pred, /*@keep@*/ exprNode ifclause,
6304 /*@keep@*/ exprNode elseclause)
6308 if (!exprNode_isError (pred))
6310 ret = exprNode_createPartialCopy (pred);
6311 checkMacroParen (pred);
6312 exprNode_checkPred (cstring_makeLiteralTemp ("conditional"), pred);
6314 if (!exprNode_isError (ifclause))
6316 checkMacroParen (ifclause); /* update macro counts! */
6318 if (!exprNode_isError (elseclause))
6320 checkMacroParen (elseclause);
6322 if (!exprNode_matchTypes (ifclause, elseclause))
6325 (exprNode_getType (ifclause),
6327 exprNode_getType (elseclause),
6329 message ("Conditional clauses are not of same type: "
6331 exprNode_unparse (ifclause),
6332 exprNode_getType (ifclause),
6333 exprNode_unparse (elseclause),
6334 exprNode_getType (elseclause)),
6337 ret->sref = sRef_undefined;
6338 ret->typ = ctype_unknown;
6343 /* for now...should merge the states */
6344 ret->sref = ifclause->sref;
6345 ret->typ = ifclause->typ;
6347 if (exprNode_isNullValue (ifclause))
6349 ret->typ = elseclause->typ;
6353 exprNode_checkUse (ret, pred->sref, pred->loc);
6354 exprNode_checkUse (ifclause, ifclause->sref, ifclause->loc);
6355 exprNode_checkUse (elseclause, elseclause->sref, elseclause->loc);
6357 exprNode_mergeCondUSs (ret, ifclause, elseclause);
6362 ret->typ = ifclause->typ;
6364 exprNode_checkUse (pred, pred->sref, pred->loc);
6365 exprNode_checkUse (ifclause, ifclause->sref, ifclause->loc);
6367 exprNode_mergeCondUSs (ret, ifclause, exprNode_undefined);
6372 if (!exprNode_isError (elseclause))
6374 ret->typ = elseclause->typ;
6376 exprNode_checkUse (pred, pred->sref, pred->loc);
6377 exprNode_checkUse (elseclause, elseclause->sref, elseclause->loc);
6379 exprNode_mergeCondUSs (ret, exprNode_undefined, elseclause);
6383 else /* pred is error */
6385 if (!exprNode_isError (ifclause))
6387 ret = exprNode_createSemiCopy (ifclause);
6389 checkMacroParen (ifclause); /* update macro counts! */
6391 if (!exprNode_isError (elseclause))
6393 checkMacroParen (elseclause);
6395 ret->typ = ifclause->typ;
6397 if (!ctype_forceMatch (ifclause->typ, elseclause->typ))
6400 (exprNode_getType (ifclause),
6402 exprNode_getType (elseclause),
6404 message ("Conditional clauses are not of same type: "
6406 exprNode_unparse (ifclause),
6407 exprNode_getType (ifclause),
6408 exprNode_unparse (elseclause),
6409 exprNode_getType (elseclause)),
6412 ret->typ = ctype_unknown;
6416 exprNode_checkUse (ifclause, ifclause->sref, ifclause->loc);
6417 exprNode_checkUse (elseclause, elseclause->sref, elseclause->loc);
6419 exprNode_mergeCondUSs (ret, ifclause, elseclause);
6422 else if (!exprNode_isError (elseclause)) /* pred, if errors */
6424 ret = exprNode_createSemiCopy (ifclause);
6426 ret->typ = elseclause->typ;
6427 checkMacroParen (elseclause);
6429 exprNode_checkUse (elseclause, elseclause->sref, elseclause->loc);
6430 exprNode_mergeCondUSs (ret, exprNode_undefined, elseclause);
6432 else /* all errors! */
6434 ret = exprNode_createLoc (ctype_unknown, fileloc_copy (g_currentloc));
6438 ret->kind = XPR_COND;
6439 ret->edata = exprData_makeCond (pred, ifclause, elseclause);
6441 if (exprNode_isDefined (ifclause) && exprNode_isDefined (elseclause))
6443 exprNode_combineControl (ret, ifclause, elseclause);
6450 exprNode_vaArg (/*@only@*/ lltok tok, /*@only@*/ exprNode arg, /*@only@*/ qtype qt)
6452 ctype totype = qtype_getType (qt);
6454 exprNode_createPartialLocCopy (arg, fileloc_copy (lltok_getLoc (tok)));
6458 ** check use of va_arg : <valist>, type -> type
6461 if (exprNode_isError (arg))
6466 targ = exprNode_getType (arg);
6469 ** arg should have be a pointer
6472 if (!ctype_isUA (targ) ||
6473 (!usymId_equal (ctype_typeId (targ),
6474 usymtab_getTypeId (cstring_makeLiteralTemp ("va_list")))))
6478 message ("First argument to va_arg is not a va_list (type %t): %s",
6479 targ, exprNode_unparse (arg)),
6483 exprNode_checkSet (ret, arg->sref);
6487 ** return type is totype
6491 ret->kind = XPR_VAARG;
6492 ret->edata = exprData_makeCast (tok, arg, qt);
6497 exprNode exprNode_labelMarker (/*@only@*/ cstring label)
6499 exprNode ret = exprNode_createPlain (ctype_undefined);
6500 ret->kind = XPR_LABEL;
6501 ret->edata = exprData_makeLiteral (label);
6502 ret->isJumpPoint = TRUE;
6504 return (ret); /* for now, ignore label */
6507 exprNode exprNode_notReached (/*@returned@*/ exprNode stmt)
6509 if (exprNode_isDefined (stmt))
6511 stmt->isJumpPoint = TRUE;
6513 /* This prevent stray no return path errors, etc. */
6514 stmt->exitCode = XK_MUSTEXIT;
6520 bool exprNode_isDefaultMarker (exprNode e)
6522 if (exprNode_isDefined (e))
6524 return (e->kind == XPR_DEFAULT || e->kind == XPR_FTDEFAULT);
6530 bool exprNode_isCaseMarker (exprNode e)
6532 if (exprNode_isDefined (e))
6534 return (e->kind == XPR_FTCASE || e->kind == XPR_CASE);
6540 bool exprNode_isLabelMarker (exprNode e)
6542 if (exprNode_isDefined (e))
6544 return (e->kind == XPR_LABEL);
6550 exprNode exprNode_caseMarker (/*@only@*/ exprNode test, bool fallThrough)
6552 exprNode ret = exprNode_createPartialCopy (test);
6554 ret->kind = fallThrough ? XPR_FTCASE : XPR_CASE;
6556 if (exprNode_isError (test)) {
6560 exprNode_checkUse (ret, test->sref, test->loc);
6562 usymtab_setExitCode (ret->exitCode);
6566 usymtab_setMustBreak ();
6569 ret->edata = exprData_makeSingle (test);
6570 ret->isJumpPoint = TRUE;
6576 exprNode exprNode_caseStatement (/*@only@*/ exprNode test, /*@only@*/ exprNode stmt, bool fallThrough)
6578 exprNode ret = exprNode_createPartialCopy (test);
6580 ret->kind = fallThrough ? XPR_FTCASE : XPR_CASE;
6581 ret->edata = exprData_makePair (test, stmt);
6582 ret->isJumpPoint = TRUE;
6584 if (exprNode_isError (test))
6589 exprNode_checkUse (ret, test->sref, test->loc);
6591 if (exprNode_isError (stmt))
6596 exprNode_mergeUSs (ret, stmt);
6598 ret->exitCode = stmt->exitCode;
6599 ret->mustBreak = stmt->mustBreak;
6600 ret->canBreak = stmt->canBreak;
6602 usymtab_setExitCode (ret->exitCode);
6606 usymtab_setMustBreak ();
6613 /*@notnull@*/ /*@only@*/ exprNode
6614 exprNode_defaultMarker (/*@only@*/ lltok def, bool fallThrough)
6616 exprNode ret = exprNode_createTok (def);
6618 ret->isJumpPoint = TRUE;
6619 ret->kind = fallThrough ? XPR_FTDEFAULT : XPR_DEFAULT;
6624 exprNode_mayEscape (exprNode e)
6626 if (exprNode_isDefined (e))
6628 return exitkind_couldEscape (e->exitCode);
6634 exprNode_mustBreak (exprNode e)
6636 if (exprNode_isDefined (e))
6638 return e->mustBreak;
6645 exprNode_mustEscape (exprNode e)
6647 if (exprNode_isDefined (e))
6649 return exitkind_mustEscape (e->exitCode) || exprNode_mustBreak (e);
6656 exprNode_errorEscape (exprNode e)
6658 if (exprNode_isDefined (e))
6660 return exitkind_isError (e->exitCode);
6666 exprNode exprNode_concat (/*@only@*/ exprNode e1, /*@only@*/ exprNode e2)
6668 exprNode ret = exprNode_createPartialCopy (e1);
6670 DPRINTF (("Concat: %s / %s", exprNode_unparse (e1), exprNode_unparse (e2)));
6672 ret->edata = exprData_makePair (e1, e2);
6673 ret->kind = XPR_STMTLIST;
6675 if (exprNode_isDefined (e1))
6677 ret->isJumpPoint = e1->isJumpPoint;
6678 ret->canBreak = e1->canBreak;
6682 if (exprNode_isDefined (e2))
6684 ret->loc = fileloc_update (ret->loc, e2->loc);
6688 if (exprNode_isDefined (e2))
6690 ret->exitCode = e2->exitCode;
6691 ret->mustBreak = e2->mustBreak;
6692 if (e2->canBreak) ret->canBreak = TRUE;
6696 ** if e1 must return, then e2 is unreachable!
6699 if (exprNode_isDefined (e1) && exprNode_isDefined (e2))
6701 if ((exprNode_mustEscape (e1) || exprNode_mustBreak (e1))
6702 && !(e2->isJumpPoint))
6704 if (context_getFlag (FLG_UNREACHABLE))
6708 if (e2->kind == XPR_STMT)
6710 nr = exprData_getUopNode (e2->edata);
6713 if ((nr->kind == XPR_TOK
6714 && lltok_isSemi (exprData_getTok (nr->edata))))
6716 /* okay to have unreachable ";" */
6717 ret->exitCode = XK_MUSTEXIT;
6718 ret->canBreak = TRUE;
6722 if (optgenerror (FLG_UNREACHABLE,
6723 message ("Unreachable code: %s",
6724 exprNode_unparseFirst (nr)),
6727 ret->isJumpPoint = TRUE;
6728 ret->mustBreak = FALSE;
6729 ret->exitCode = XK_ERROR;
6730 DPRINTF (("Jump point: %s", exprNode_unparse (ret)));
6734 ret->exitCode = XK_MUSTEXIT;
6735 ret->canBreak = TRUE;
6743 if ((e2->kind == XPR_CASE || e2->kind == XPR_DEFAULT))
6746 ** We want a warning anytime we have:
6748 ** yyy; <<<- no break or return
6752 exprNode lastStmt = exprNode_lastStatement (e1);
6754 if (exprNode_isDefined (lastStmt)
6755 && !exprNode_mustEscape (lastStmt)
6756 && !exprNode_mustBreak (lastStmt)
6757 && !exprNode_isCaseMarker (lastStmt)
6758 && !exprNode_isDefaultMarker (lastStmt)
6759 && !exprNode_isLabelMarker (lastStmt))
6761 voptgenerror (FLG_CASEBREAK,
6763 ("Fall through case (no preceding break)"),
6770 exprNode_mergeUSs (ret, e2);
6772 usymtab_setExitCode (ret->exitCode);
6776 usymtab_setMustBreak ();
6779 DPRINTF (("==> %s", exprNode_unparse (ret)));
6783 exprNode exprNode_createTok (/*@only@*/ lltok t)
6785 exprNode ret; /*@i23 if on same line, bad things happen...!@*/
6786 ret = exprNode_create (ctype_unknown);
6787 ret->kind = XPR_TOK;
6788 ret->edata = exprData_makeTok (t);
6792 exprNode exprNode_statement (/*@only@*/ exprNode e, /*@only@*/ lltok t)
6794 if (!exprNode_isError (e))
6796 exprChecks_checkStatementEffect(e);
6799 return (exprNode_statementError (e, t));
6802 static exprNode exprNode_statementError (/*@only@*/ exprNode e, /*@only@*/ lltok t)
6804 exprNode ret = exprNode_createPartialCopy (e);
6806 if (!exprNode_isError (e))
6808 if (e->kind != XPR_ASSIGN)
6810 exprNode_checkUse (ret, e->sref, e->loc);
6813 ret->exitCode = e->exitCode;
6814 ret->canBreak = e->canBreak;
6815 ret->mustBreak = e->mustBreak;
6818 ret->edata = exprData_makeUop (e, t);
6819 ret->kind = XPR_STMT;
6824 exprNode exprNode_checkExpr (/*@returned@*/ exprNode e)
6826 if (!exprNode_isError (e))
6828 if (e->kind != XPR_ASSIGN)
6830 exprNode_checkUse (e, e->sref, e->loc);
6837 void exprNode_produceGuards (exprNode pred)
6839 if (!exprNode_isError (pred))
6841 if (ctype_isRealPointer (pred->typ))
6843 pred->guards = guardSet_addTrueGuard (pred->guards, pred->sref);
6846 exprNode_checkUse (pred, pred->sref, pred->loc);
6847 exprNode_resetSref (pred);
6851 exprNode exprNode_compoundStatementExpression (/*@only@*/ lltok tlparen, /*@only@*/ exprNode e)
6855 DPRINTF (("Compound: %s", exprNode_unparse (e)));
6857 if (!context_flagOn (FLG_GNUEXTENSIONS, exprNode_loc (e)))
6859 (void) llgenhinterror
6861 message ("Compound statement expressions is not supported by ISO C99"),
6862 message ("Use +gnuextensions to allow compound statement expressions (and other GNU language extensions) "
6863 "without this warning"),
6868 ** The type of a compoundStatementExpression is the type of the last statement
6871 llassert (exprNode_isBlock (e));
6872 laststmt = exprNode_lastStatement (e);
6874 DPRINTF (("Last statement: %s / %s", exprNode_unparse (laststmt), ctype_unparse (exprNode_getType (laststmt))));
6875 DPRINTF (("e: %s", exprNode_unparse (e)));
6876 e->typ = exprNode_getType (laststmt);
6877 return exprNode_addParens (tlparen, e);
6881 exprNode exprNode_makeBlock (/*@only@*/ exprNode e)
6883 exprNode ret = exprNode_createPartialCopy (e);
6885 if (!exprNode_isError (e))
6887 ret->exitCode = e->exitCode;
6888 ret->canBreak = e->canBreak;
6889 ret->mustBreak = e->mustBreak;
6892 DPRINTF (("Block e: %s", exprNode_unparse (e)));
6893 ret->edata = exprData_makeSingle (e);
6894 ret->kind = XPR_BLOCK;
6895 DPRINTF (("Block: %s", exprNode_unparse (ret)));
6899 bool exprNode_isBlock (exprNode e)
6901 return (exprNode_isDefined (e)
6902 && ((e)->kind == XPR_BLOCK));
6905 bool exprNode_isStatement (exprNode e)
6907 return (exprNode_isDefined (e)
6908 && ((e)->kind == XPR_STMT));
6911 bool exprNode_isAssign (exprNode e)
6913 if (exprNode_isDefined (e))
6915 return (e->kind == XPR_ASSIGN);
6921 bool exprNode_isEmptyStatement (exprNode e)
6923 return (exprNode_isDefined (e)
6924 && (e->kind == XPR_TOK)
6925 && (lltok_isSemi (exprData_getTok (e->edata))));
6928 bool exprNode_isMultiStatement (exprNode e)
6930 return (exprNode_isDefined (e)
6931 && ((e->kind == XPR_FOR)
6932 || (e->kind == XPR_FORPRED)
6933 || (e->kind == XPR_IF)
6934 || (e->kind == XPR_IFELSE)
6935 || (e->kind == XPR_WHILE)
6936 || (e->kind == XPR_WHILEPRED)
6937 || (e->kind == XPR_DOWHILE)
6938 || (e->kind == XPR_BLOCK)
6939 || (e->kind == XPR_STMT)
6940 || (e->kind == XPR_STMTLIST)
6941 || (e->kind == XPR_SWITCH)));
6944 void exprNode_checkIfPred (exprNode pred)
6946 exprNode_checkPred (cstring_makeLiteralTemp ("if"), pred);
6949 exprNode exprNode_if (/*@only@*/ exprNode pred, /*@only@*/ exprNode tclause)
6952 bool emptyErr = FALSE;
6954 if (context_maybeSet (FLG_IFEMPTY))
6956 if (exprNode_isEmptyStatement (tclause))
6958 emptyErr = optgenerror (FLG_IFEMPTY,
6960 ("Body of if statement is empty"),
6961 exprNode_loc (tclause));
6965 if (!emptyErr && context_maybeSet (FLG_IFBLOCK))
6967 if (exprNode_isDefined (tclause)
6968 && !exprNode_isBlock (tclause))
6970 voptgenerror (FLG_IFBLOCK,
6972 ("Body of if statement is not a block: %s",
6973 exprNode_unparse (tclause)),
6974 exprNode_loc (tclause));
6978 if (exprNode_isError (pred))
6980 if (exprNode_isError (tclause))
6982 ret = exprNode_createLoc (ctype_unknown, fileloc_copy (g_currentloc));
6986 ret = exprNode_createPartialCopy (tclause);
6991 if (exprNode_mustEscape (pred))
6995 message ("Predicate always exits: %s", exprNode_unparse (pred)),
6996 exprNode_loc (pred));
6999 /*! exprNode_checkPred (cstring_makeLiteralTemp ("if"), pred); */ /*@i523@*/
7000 exprNode_checkUse (pred, pred->sref, pred->loc);
7002 if (!exprNode_isError (tclause))
7004 exprNode_mergeCondUSs (pred, tclause, exprNode_undefined);
7007 ret = exprNode_createPartialCopy (pred);
7011 ret->edata = exprData_makePair (pred, tclause);
7013 ret->exitCode = XK_UNKNOWN;
7015 if (exprNode_isDefined (tclause))
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);
7024 ret->mustBreak = FALSE;
7029 exprNode exprNode_ifelse (/*@only@*/ exprNode pred,
7030 /*@only@*/ exprNode tclause,
7031 /*@only@*/ exprNode eclause)
7034 bool tEmptyErr = FALSE;
7035 bool eEmptyErr = FALSE;
7037 if (context_maybeSet (FLG_IFEMPTY))
7039 if (exprNode_isEmptyStatement (tclause))
7041 tEmptyErr = optgenerror
7044 ("Body of if clause of if statement is empty"),
7045 exprNode_loc (tclause));
7048 if (exprNode_isEmptyStatement (eclause))
7050 eEmptyErr = optgenerror
7053 ("Body of else clause of if statement is empty"),
7054 exprNode_loc (eclause));
7058 if (context_maybeSet (FLG_IFBLOCK))
7061 && exprNode_isDefined (tclause)
7062 && !exprNode_isBlock (tclause))
7064 voptgenerror (FLG_IFBLOCK,
7066 ("Body of if clause of if statement is not a block: %s",
7067 exprNode_unparse (tclause)),
7068 exprNode_loc (tclause));
7072 && exprNode_isDefined (eclause)
7073 && !exprNode_isBlock (eclause)
7074 && !(eclause->kind == XPR_IF)
7075 && !(eclause->kind == XPR_IFELSE))
7080 ("Body of else clause of if statement is not a block: %s",
7081 exprNode_unparse (eclause)),
7082 exprNode_loc (eclause));
7086 if (context_maybeSet (FLG_ELSEIFCOMPLETE))
7088 if (exprNode_isDefined (eclause)
7089 && (eclause->kind == XPR_IF))
7091 voptgenerror (FLG_ELSEIFCOMPLETE,
7092 message ("Incomplete else if logic (no final else): %s",
7093 exprNode_unparse (eclause)),
7094 exprNode_loc (eclause));
7098 if (exprNode_isError (pred))
7100 if (exprNode_isError (tclause))
7102 if (exprNode_isError (eclause))
7104 ret = exprNode_createLoc (ctype_unknown, fileloc_copy (g_currentloc));
7108 ret = exprNode_createPartialCopy (eclause);
7113 ret = exprNode_createPartialCopy (tclause);
7116 else /* pred is okay */
7118 ret = exprNode_createPartialCopy (pred);
7120 if (exprNode_mustEscape (pred))
7124 message ("Predicate always exits: %s", exprNode_unparse (pred)),
7125 exprNode_loc (pred));
7128 /*@i3423 exprNode_checkPred (cstring_makeLiteralTemp ("if"), pred);*/
7129 exprNode_checkUse (ret, pred->sref, pred->loc);
7131 exprNode_mergeCondUSs (ret, tclause, eclause);
7134 ret->kind = XPR_IFELSE;
7135 ret->edata = exprData_makeCond (pred, tclause, eclause);
7137 if (exprNode_isDefined (tclause) && exprNode_isDefined (eclause))
7139 exprNode_combineControl (ret, tclause, eclause);
7140 ret->loc = fileloc_update (ret->loc, eclause->loc);
7147 ** *allpaths <- TRUE iff all executions paths must go through the switch
7151 checkSwitchExpr (exprNode test, /*@dependent@*/ exprNode e, /*@out@*/ bool *allpaths)
7153 exprNodeSList el = exprNode_flatten (e);
7154 bool mustReturn = TRUE; /* find a branch that doesn't */
7155 bool thisReturn = FALSE;
7156 bool hasDefault = FALSE;
7157 bool hasAllMembers = FALSE;
7158 bool inSwitch = FALSE;
7159 bool isEnumSwitch = FALSE;
7160 bool canBreak = FALSE;
7161 bool fallThrough = FALSE;
7162 ctype ct = ctype_unknown;
7163 enumNameSList usedEnums;
7166 if (exprNode_isDefined (test))
7171 ttype = ctype_realType (ct);
7173 if (ctype_isEnum (ttype))
7175 isEnumSwitch = TRUE;
7176 enums = ctype_elist (ttype);
7177 usedEnums = enumNameSList_new ();
7181 exprNodeSList_elements (el, current)
7184 DPRINTF ((message("checkSwitchExpr current = %s ", exprNode_unparse(current) ) ));
7186 if (exprNode_isDefined (current))
7188 switch (current->kind)
7195 (FLG_DUPLICATECASES,
7196 message ("Duplicate default cases in switch"),
7197 exprNode_loc (current));
7202 if (current->kind == XPR_DEFAULT || current->kind == XPR_FTDEFAULT)
7210 exprNode st = exprData_getSingle (current->edata);
7211 uentry ue = exprNode_getUentry (st);
7213 if (uentry_isValid (ue))
7215 cstring cname = uentry_rawName (ue);
7217 if (enumNameList_member (/*@-usedef@*/enums/*@=usedef@*/, cname))
7219 if (enumNameSList_member
7220 (/*@-usedef@*/usedEnums/*@=usedef@*/, cname))
7223 (FLG_DUPLICATECASES,
7224 message ("Duplicate case in switch: %s",
7230 enumNameSList_addh (usedEnums, cname);
7237 message ("Case in switch not %s member: %s",
7238 ctype_unparse (ct), cname),
7245 if (inSwitch && !fallThrough)
7247 if (!thisReturn || canBreak)
7257 /*@switchbreak@*/ break;
7259 thisReturn = thisReturn || exprNode_mustEscape (current);
7260 canBreak = canBreak || current->canBreak;
7261 if (canBreak) fallThrough = FALSE;
7264 } end_exprNodeSList_elements;
7266 if (inSwitch) /* check the last one! */
7268 if (!thisReturn || canBreak)
7277 && (enumNameSList_size (/*@-usedef@*/usedEnums/*@=usedef@*/) !=
7278 enumNameList_size (/*@-usedef@*/enums/*@=usedef@*/)))
7280 enumNameSList unused = enumNameSList_subtract (enums, usedEnums);
7282 voptgenerror (FLG_MISSCASE,
7283 message ("Missing case%s in switch: %q",
7284 cstring_makeLiteralTemp
7285 ((enumNameSList_size (unused) > 1) ? "s" : ""),
7286 enumNameSList_unparse (unused)),
7289 enumNameSList_free (unused);
7290 *allpaths = FALSE; /* evans 2002-01-01 */
7294 hasAllMembers = TRUE;
7298 enumNameSList_free (usedEnums);
7302 *allpaths = hasDefault;
7305 exprNodeSList_free (el);
7306 return ((hasDefault || hasAllMembers) && mustReturn);
7309 exprNode exprNode_switch (/*@only@*/ exprNode e, /*@only@*/ exprNode s)
7311 exprNode ret = exprNode_createPartialCopy (e);
7314 DPRINTF (("Switch: %s", exprNode_unparse (s)));
7316 ret->kind = XPR_SWITCH;
7317 ret->edata = exprData_makePair (e, s);
7319 if (!exprNode_isError (s))
7321 exprNode fs = exprNode_firstStatement (s);
7322 ret->loc = fileloc_update (ret->loc, s->loc);
7324 if (exprNode_isUndefined (fs)
7325 || exprNode_isCaseMarker (fs) || exprNode_isLabelMarker (fs)
7326 || exprNode_isDefaultMarker (fs)) {
7329 voptgenerror (FLG_FIRSTCASE,
7331 ("Statement after switch is not a case: %s", exprNode_unparse (fs)),
7336 if (!exprNode_isError (e))
7338 if (checkSwitchExpr (e, s, &allpaths))
7340 ret->exitCode = XK_MUSTRETURN;
7344 ret->exitCode = e->exitCode;
7347 ret->canBreak = e->canBreak;
7348 ret->mustBreak = e->mustBreak;
7352 ** exprNode.c:3883,32: Variable allpaths used before definition
7359 DPRINTF (("Context exit switch!"));
7360 context_exitSwitch (ret, allpaths);
7361 DPRINTF (("Context exit switch done!"));
7366 static void checkInfiniteLoop (/*@notnull@*/ exprNode test,
7367 /*@notnull@*/ exprNode body)
7369 sRefSet tuses = test->uses;
7371 if (!sRefSet_isEmpty (test->uses))
7373 sRefSet sets = sRefSet_newCopy (body->sets);
7374 bool hasError = TRUE;
7375 bool innerState = FALSE;
7376 sRefSet tuncon = sRefSet_undefined;
7378 sets = sRefSet_union (sets, test->sets);
7379 sets = sRefSet_union (sets, body->msets);
7380 sets = sRefSet_union (sets, test->msets);
7382 sRefSet_allElements (tuses, el)
7384 if (sRef_isUnconstrained (el))
7386 tuncon = sRefSet_insert (tuncon, el);
7390 if (sRefSet_member (sets, el))
7397 if (sRef_isInternalState (el)
7398 || sRef_isFileStatic (sRef_getRootBase (el)))
7402 } end_sRefSet_allElements ;
7406 sRefSet suncon = sRefSet_undefined;
7407 bool sinner = FALSE;
7409 sRefSet_allElements (sets, el)
7411 if (sRef_isUnconstrained (el))
7413 suncon = sRefSet_insert (suncon, el);
7415 else if (sRef_isInternalState (el))
7423 } end_sRefSet_allElements ;
7425 if (sinner && innerState)
7429 else if (sRefSet_isEmpty (tuncon)
7430 && sRefSet_isEmpty (suncon))
7435 ("Suspected infinite loop. No value used in loop test (%q) "
7436 "is modified by test or loop body.",
7437 sRefSet_unparsePlain (tuses)),
7442 if (sRefSet_isEmpty (tuncon))
7446 message ("Suspected infinite loop. No condition values "
7447 "modified. Modification possible through "
7448 "unconstrained calls: %q",
7449 sRefSet_unparsePlain (suncon)),
7456 message ("Suspected infinite loop. No condition values "
7457 "modified. Possible undetected dependency through "
7458 "unconstrained calls in loop test: %q",
7459 sRefSet_unparsePlain (tuncon)),
7465 sRefSet_free (sets);
7469 exprNode exprNode_while (/*@keep@*/ exprNode t, /*@keep@*/ exprNode b)
7472 bool emptyErr = FALSE;
7474 if (context_maybeSet (FLG_WHILEEMPTY))
7476 if (exprNode_isEmptyStatement (b))
7478 emptyErr = optgenerror
7481 ("Body of while statement is empty"),
7486 if (!emptyErr && context_maybeSet (FLG_WHILEBLOCK))
7488 if (exprNode_isDefined (b)
7489 && !exprNode_isBlock (b))
7491 if (context_inIterDef ()
7492 && (b->kind == XPR_STMTLIST
7493 || b->kind == XPR_TOK))
7499 voptgenerror (FLG_WHILEBLOCK,
7501 ("Body of while statement is not a block: %s",
7502 exprNode_unparse (b)),
7508 if (exprNode_isError (t))
7510 if (exprNode_isError (b))
7512 ret = exprNode_createLoc (ctype_unknown, fileloc_copy (g_currentloc));
7516 ret = exprNode_createPartialCopy (b);
7523 ret = exprNode_createPartialCopy (t);
7525 llassert (t->kind == XPR_WHILEPRED);
7527 test = exprData_getSingle (t->edata);
7529 if (!exprNode_isError (b) && exprNode_isDefined (test))
7531 if (context_maybeSet (FLG_INFLOOPS)
7532 || context_maybeSet (FLG_INFLOOPSUNCON))
7535 ** check that some variable in the predicate is set by the body
7536 ** if the predicate uses any variables
7539 checkInfiniteLoop (test, b);
7542 exprNode_mergeUSs (ret, b);
7544 if (exprNode_isDefined (b))
7546 ret->exitCode = exitkind_makeConditional (b->exitCode);
7551 ret->edata = exprData_makePair (t, b);
7552 ret->kind = XPR_WHILE;
7554 if (exprNode_isDefined (t) && exprNode_mustEscape (t))
7558 message ("Predicate always exits: %s", exprNode_unparse (t)),
7562 ret->exitCode = XK_NEVERESCAPE;
7565 ** If loop is infinite, and there is no break inside,
7566 ** exit code is never reach.
7569 if (exprNode_knownIntValue (t))
7571 if (!exprNode_isZero (t))
7573 if (exprNode_isDefined (b))
7577 /* Really, it means never reached. */
7578 ret->exitCode = XK_MUSTEXIT;
7588 ret->canBreak = FALSE;
7589 ret->mustBreak = FALSE;
7595 ** do { b } while (t);
7597 ** note: body passed as first argument
7600 exprNode exprNode_doWhile (/*@only@*/ exprNode b, /*@only@*/ exprNode t)
7604 DPRINTF (("Do while: %s / %s",
7605 exprNode_unparse (b), exprNode_unparse (t)));
7607 if (exprNode_isError (t))
7609 if (exprNode_isError (b))
7611 ret = exprNode_createLoc (ctype_unknown, fileloc_copy (g_currentloc));
7615 ret = exprNode_createPartialCopy (b);
7617 ret->exitCode = exitkind_makeConditional (b->exitCode);
7618 exprNode_checkUse (ret, b->sref, b->loc);
7619 ret->exitCode = b->exitCode;
7620 ret->canBreak = b->canBreak;
7621 ret->mustBreak = FALSE;
7626 DPRINTF (("Do while: %s / %s",
7627 exitkind_unparse (t->exitCode),
7628 exitkind_unparse (b->exitCode)));
7630 ret = exprNode_createPartialCopy (t);
7631 exprNode_checkPred (cstring_makeLiteralTemp ("while"), t);
7633 if (!exprNode_isError (b))
7636 ** forgot the copy's --- why wasn't this detected??
7639 ret->sets = sRefSet_copyInto (ret->sets, b->sets);
7640 ret->msets = sRefSet_copyInto (ret->msets, b->msets);
7641 ret->uses = sRefSet_copyInto (ret->uses, b->uses);
7643 /* left this out --- causes and aliasing bug (infinite loop)
7644 should be detected?? */
7646 exprNode_checkUse (ret, b->sref, b->loc);
7647 exprNode_mergeUSs (ret, t);
7648 exprNode_checkUse (ret, t->sref, t->loc);
7650 /* evans 2001-10-05: while loop can break */
7651 ret->exitCode = exitkind_makeConditional (b->exitCode);
7653 DPRINTF (("Do while: %s",
7654 exitkind_unparse (ret->exitCode)));
7656 ret->canBreak = b->canBreak;
7658 /* Always FALSE for doWhile loops - break's when test is false */
7659 ret->mustBreak = FALSE; /* b->mustBreak; */
7663 context_exitDoWhileClause (t);
7665 ret->kind = XPR_DOWHILE;
7666 ret->edata = exprData_makePair (t, b);
7670 bool exprNode_loopMustExec (exprNode forPred)
7673 ** Returns true if it is obvious that the loop always executes at least once
7675 ** For now, we only identify the most obvious cases. Should be true anytime
7676 ** we can prove init => !test.
7679 if (exprNode_isDefined (forPred))
7681 exprNode init, test, inc;
7684 llassert (forPred->kind == XPR_FORPRED);
7686 edata = forPred->edata;
7687 init = exprData_getTripleInit (edata);
7688 test = exprData_getTripleTest (edata);
7689 inc = exprData_getTripleInc (edata);
7691 if (exprNode_isAssign (init))
7693 exprNode loopVar = exprData_getOpA (init->edata);
7694 exprNode loopInit = exprData_getOpB (init->edata);
7696 if (exprNode_isDefined (test) && test->kind == XPR_OP)
7698 exprNode testVar = exprData_getOpA (test->edata);
7699 exprNode testVal = exprData_getOpB (test->edata);
7700 lltok comp = exprData_getOpTok (test->edata);
7701 int opid = lltok_getTok (comp);
7703 DPRINTF (("Same storage: %s / %s", exprNode_unparse (loopVar),
7704 exprNode_unparse (testVar)));
7706 if (exprNode_sameStorage (loopVar, testVar))
7708 multiVal valinit = exprNode_getValue (loopInit);
7709 multiVal valtest = exprNode_getValue (testVal);
7711 DPRINTF (("Values: %s / %s", multiVal_unparse (valinit),
7712 multiVal_unparse (valtest)));
7714 if (multiVal_isInt (valinit) && multiVal_isInt (valtest))
7716 long v1 = multiVal_forceInt (valinit);
7717 long v2 = multiVal_forceInt (valtest);
7719 DPRINTF (("Here: %ld %ld", v1, v2));
7721 if ((opid == EQ_OP && v1 < v2)
7722 || (opid == NE_OP && v1 != v2)
7723 || (opid == TLT && v1 <= v2)
7724 || (opid == TGT && v1 >= v2)
7725 || (opid == LE_OP && v1 < v2)
7726 || (opid == GE_OP && v1 > v2))
7728 DPRINTF (("mustexec if inc"));
7737 DPRINTF (("loop must exec: FALSE"));
7741 exprNode exprNode_for (/*@keep@*/ exprNode inc, /*@keep@*/ exprNode body)
7744 bool emptyErr = FALSE;
7746 if (context_maybeSet (FLG_FOREMPTY))
7748 if (exprNode_isEmptyStatement (body))
7750 emptyErr = optgenerror
7753 ("Body of for statement is empty"),
7754 exprNode_loc (body));
7758 if (!emptyErr && context_maybeSet (FLG_FORBLOCK))
7760 if (exprNode_isDefined (body)
7761 && !exprNode_isBlock (body))
7763 if (context_inIterDef ()
7764 && (body->kind == XPR_STMTLIST
7765 || body->kind == XPR_TOK))
7771 voptgenerror (FLG_FORBLOCK,
7773 ("Body of for statement is not a block: %s",
7774 exprNode_unparse (body)),
7775 exprNode_loc (body));
7781 ** for ud purposes: (alreadly) init -> test -> (now) LOOP: body + inc + test
7784 if (exprNode_isError (body))
7786 ret = exprNode_createPartialCopy (inc);
7790 ret = exprNode_createPartialCopy (body);
7792 ret->exitCode = exitkind_makeConditional (body->exitCode);
7794 exprNode_mergeUSs (inc, body);
7796 if (exprNode_isDefined (inc))
7800 context_setMessageAnnote (cstring_makeLiteral ("in post loop increment"));
7802 tmp = exprNode_effect (exprData_getTripleInc (inc->edata));
7803 exprNode_freeShallow (tmp);
7805 context_clearMessageAnnote ();
7806 context_setMessageAnnote (cstring_makeLiteral ("in post loop test"));
7808 tmp = exprNode_effect (exprData_getTripleTest (inc->edata));
7809 exprNode_freeShallow (tmp);
7811 context_clearMessageAnnote ();
7813 ret->uses = sRefSet_copyInto (ret->uses, inc->uses);
7814 ret->sets = sRefSet_copyInto (ret->sets, inc->sets);
7815 ret->msets = sRefSet_copyInto (ret->msets, inc->msets);
7819 ret->kind = XPR_FOR;
7820 ret->edata = exprData_makePair (inc, body);
7822 if (exprNode_isDefined (inc)) {
7823 exprNode test = exprData_getTripleTest (inc->edata);
7825 if (exprNode_isUndefined (test)) {
7826 if (exprNode_isDefined (body)) {
7827 if (!body->canBreak) {
7828 /* Really, it means never reached. */
7829 ret->exitCode = XK_MUSTEXIT;
7839 ** for (init; test; inc)
7842 ** while (test) { body; inc; }
7844 ** Now: check use of init (may set vars for test)
7845 ** check use of test
7849 /*@observer@*/ guardSet exprNode_getForGuards (exprNode pred)
7853 if (exprNode_isError (pred)) return guardSet_undefined;
7855 llassert (pred->kind == XPR_FORPRED);
7857 test = exprData_getTripleTest (pred->edata);
7859 if (!exprNode_isError (test))
7861 return (test->guards);
7864 return guardSet_undefined;
7867 exprNode exprNode_whilePred (/*@only@*/ exprNode test)
7869 exprNode ret = exprNode_createSemiCopy (test);
7871 if (exprNode_isDefined (test))
7873 exprNode_copySets (ret, test);
7874 exprNode_checkPred (cstring_makeLiteralTemp ("while"), test);
7875 exprNode_checkUse (ret, test->sref, test->loc);
7877 exprNode_produceGuards (test);
7879 ret->guards = guardSet_copy (test->guards);
7882 ret->edata = exprData_makeSingle (test);
7883 ret->kind = XPR_WHILEPRED;
7887 exprNode exprNode_forPred (/*@only@*/ exprNode init, /*@only@*/ exprNode test,
7888 /*@only@*/ exprNode inc)
7893 ** for ud purposes: init -> test -> LOOP: [ body, inc ]
7896 exprNode_checkPred (cstring_makeLiteralTemp ("for"), test);
7898 if (!exprNode_isError (inc))
7900 ret = exprNode_createPartialCopy (inc);
7904 if (!exprNode_isError (init))
7906 ret = exprNode_createPartialCopy (init);
7908 else if (!exprNode_isError (test))
7910 ret = exprNode_createPartialCopy (test);
7914 ret = exprNode_createUnknown ();
7918 exprNode_mergeUSs (ret, init);
7920 if (exprNode_isDefined (init))
7922 exprNode_checkUse (ret, init->sref, init->loc);
7925 exprNode_mergeUSs (ret, test);
7927 if (exprNode_isDefined (test))
7929 exprNode_checkUse (ret, test->sref, test->loc);
7932 ret->kind = XPR_FORPRED;
7933 ret->edata = exprData_makeFor (init, test, inc);
7937 /*@notnull@*/ /*@only@*/ exprNode exprNode_goto (/*@only@*/ cstring label)
7939 exprNode ret = exprNode_createUnknown ();
7941 if (context_inMacro ())
7943 voptgenerror (FLG_MACROSTMT,
7944 message ("Macro %s uses goto (not functional)",
7945 context_inFunctionName ()),
7949 ret->kind = XPR_GOTO;
7950 ret->edata = exprData_makeLiteral (label);
7951 ret->mustBreak = TRUE;
7952 ret->exitCode = XK_GOTO;
7953 ret->canBreak = TRUE;
7957 exprNode exprNode_continue (/*@only@*/ lltok l, int qcontinue)
7959 exprNode ret = exprNode_createLoc (ctype_unknown, fileloc_copy (lltok_getLoc (l)));
7961 ret->kind = XPR_CONTINUE;
7962 ret->edata = exprData_makeTok (l);
7963 ret->canBreak = TRUE;
7964 ret->mustBreak = TRUE;
7966 if (qcontinue == QSAFEBREAK)
7970 else if (qcontinue == QINNERCONTINUE)
7972 if (!context_inDeepLoop ())
7975 (FLG_LOOPLOOPCONTINUE,
7976 cstring_makeLiteral ("Continue statement marked with innercontinue "
7977 "is not inside a nested loop"),
7978 exprNode_loc (ret));
7981 else if (qcontinue == BADTOK)
7983 if (context_inDeepLoop ())
7986 (FLG_LOOPLOOPCONTINUE,
7987 cstring_makeLiteral ("Continue statement in nested loop"),
7988 exprNode_loc (ret));
7993 llbuglit ("exprNode_continue: bad qcontinue");
7999 exprNode exprNode_break (/*@only@*/ lltok l, int bqual)
8001 exprNode ret = exprNode_createLoc (ctype_unknown, fileloc_copy (lltok_getLoc (l)));
8002 clause breakClause = context_breakClause ();
8004 ret->kind = XPR_BREAK;
8005 ret->edata = exprData_makeTok (l);
8006 ret->canBreak = TRUE;
8007 ret->mustBreak = TRUE;
8009 if (breakClause == NOCLAUSE)
8013 cstring_makeLiteral ("Break not inside while, for or switch statement"),
8014 exprNode_loc (ret));
8018 if (bqual != BADTOK)
8025 if (breakClause == SWITCHCLAUSE)
8027 if (!context_inDeepSwitch ())
8029 voptgenerror (FLG_SYNTAX,
8031 ("Break preceded by innerbreak is not in a deep switch"),
8032 exprNode_loc (ret));
8037 if (!context_inDeepLoop ())
8039 voptgenerror (FLG_SYNTAX,
8041 ("Break preceded by innerbreak is not in a deep loop"),
8042 exprNode_loc (ret));
8047 if (breakClause == SWITCHCLAUSE)
8049 voptgenerror (FLG_SYNTAX,
8051 ("Break preceded by loopbreak is breaking a switch"),
8052 exprNode_loc (ret));
8056 if (breakClause != SWITCHCLAUSE)
8060 message ("Break preceded by switchbreak is breaking %s",
8061 cstring_makeLiteralTemp
8062 ((breakClause == WHILECLAUSE
8063 || breakClause == DOWHILECLAUSE) ? "a while loop"
8064 : (breakClause == FORCLAUSE) ? "a for loop"
8065 : (breakClause == ITERCLAUSE) ? "an iterator"
8067 exprNode_loc (ret));
8075 if (breakClause == SWITCHCLAUSE)
8077 clause nextBreakClause = context_nextBreakClause ();
8079 switch (nextBreakClause)
8081 case NOCLAUSE: break;
8087 (FLG_LOOPSWITCHBREAK,
8088 cstring_makeLiteral ("Break statement in switch inside loop"),
8089 exprNode_loc (ret));
8093 (FLG_SWITCHSWITCHBREAK,
8094 cstring_makeLiteral ("Break statement in switch inside switch"),
8095 exprNode_loc (ret));
8102 if (context_inDeepLoop ())
8106 cstring_makeLiteral ("Break statement in nested loop"),
8107 exprNode_loc (ret));
8111 if (context_inDeepLoopSwitch ())
8114 (FLG_SWITCHLOOPBREAK,
8115 cstring_makeLiteral ("Break statement in loop inside switch"),
8116 exprNode_loc (ret));
8126 exprNode exprNode_nullReturn (/*@only@*/ lltok t)
8128 fileloc loc = lltok_getLoc (t);
8129 exprNode ret = exprNode_createLoc (ctype_unknown, fileloc_copy (loc));
8131 context_returnFunction ();
8132 exprChecks_checkNullReturn (loc);
8134 ret->kind = XPR_NULLRETURN;
8135 ret->edata = exprData_makeTok (t);
8136 ret->exitCode = XK_MUSTRETURN;
8140 exprNode exprNode_return (/*@only@*/ exprNode e)
8144 if (exprNode_isError (e))
8146 ret = exprNode_createUnknown ();
8150 ret = exprNode_createLoc (ctype_unknown, fileloc_copy (e->loc));
8152 exprNode_checkUse (ret, e->sref, e->loc);
8153 exprNode_checkReturn (e);
8156 context_returnFunction ();
8157 ret->kind = XPR_RETURN;
8158 ret->edata = exprData_makeSingle (e);
8159 ret->exitCode = XK_MUSTRETURN;
8164 exprNode exprNode_comma (/*@only@*/ exprNode e1, /*@only@*/ exprNode e2)
8168 if (exprNode_isError (e1))
8170 if (exprNode_isError (e2))
8172 ret = exprNode_createLoc (ctype_unknown, fileloc_copy (g_currentloc));
8176 ret = exprNode_createPartialCopy (e2);
8177 exprNode_checkUse (ret, e2->sref, e2->loc);
8178 ret->sref = e2->sref;
8183 ret = exprNode_createPartialCopy (e1);
8185 exprNode_checkUse (ret, e1->sref, e1->loc);
8187 if (!exprNode_isError (e2))
8189 exprNode_mergeUSs (ret, e2);
8190 exprNode_checkUse (ret, e2->sref, e2->loc);
8191 ret->sref = e2->sref;
8195 ret->kind = XPR_COMMA;
8196 ret->edata = exprData_makePair (e1, e2);
8198 if (exprNode_isDefined (e1))
8200 if (exprNode_isDefined (e2))
8204 if (exprNode_mustEscape (e1) || e1->mustBreak)
8208 message ("Second clause of comma expression is unreachable: %s",
8209 exprNode_unparse (e2)),
8213 ret->exitCode = exitkind_combine (e1->exitCode, e2->exitCode);
8214 ret->mustBreak = e1->mustBreak || e2->mustBreak;
8215 ret->canBreak = e1->canBreak || e2->canBreak;
8219 if (exprNode_mustEscape (e1) || e1->mustBreak)
8223 message ("Second clause of comma expression is unreachable: %s",
8224 exprNode_unparse (e2)),
8228 ret->exitCode = e1->exitCode;
8229 ret->canBreak = e1->canBreak;
8234 if (exprNode_isDefined (e2))
8236 ret->exitCode = e2->exitCode;
8237 ret->mustBreak = e2->mustBreak;
8238 ret->canBreak = e2->canBreak;
8245 static bool exprNode_checkOneInit (/*@notnull@*/ exprNode el, exprNode val)
8247 ctype t1 = exprNode_getType (el);
8248 ctype t2 = exprNode_getType (val);
8249 bool hasError = FALSE;
8251 DPRINTF (("Check one init: %s / %s",
8252 exprNode_unparse (el),
8253 exprNode_unparse (val)));
8255 if (ctype_isUnknown (t1))
8257 voptgenerror (FLG_IMPTYPE,
8258 message ("Variable has unknown (implicitly int) type: %s",
8259 exprNode_unparse (el)),
8263 el->typ = ctype_int;
8266 if (exprNode_isDefined (val) && val->kind == XPR_INITBLOCK)
8268 exprNodeList vals = exprData_getArgs (val->edata);
8270 DPRINTF (("Check one init: %s", exprNodeList_unparse (vals)));
8271 DPRINTF (("Type: %s", ctype_unparse (t1)));
8273 if (ctype_isRealAP (t1))
8278 if (ctype_isFixedArray (t1))
8280 size_t nelements = ctype_getArraySize (t1);
8282 DPRINTF (("Checked array: %s / %d",
8283 ctype_unparse (t1), nelements));
8285 if (exprNode_isStringLiteral (val))
8287 exprNode_checkStringLiteralLength (t1, val);
8291 if (exprNodeList_size (vals) != size_toInt (nelements))
8293 hasError = optgenerror
8294 (exprNodeList_size (vals) > size_toInt (nelements)
8295 ? FLG_INITSIZE : FLG_INITALLELEMENTS,
8296 message ("Initializer block for "
8297 "%s has %d element%&, but declared as %s: %q",
8298 exprNode_unparse (el),
8299 exprNodeList_size (vals),
8301 exprNodeList_unparse (vals)),
8307 exprNodeList_elements (vals, oneval)
8309 cstring istring = message ("%d", i);
8312 (exprNode_fakeCopy (el),
8313 exprNode_numLiteral (ctype_int, istring,
8314 fileloc_copy (el->loc), i));
8316 if (exprNode_isDefined (newel))
8318 if (exprNodeList_size (vals) == 1
8319 && ctype_isString (exprNode_getType (oneval))
8320 && ctype_isChar (exprNode_getType (newel)))
8322 exprNode_freeIniter (newel);
8326 if (exprNode_checkOneInit (newel, oneval))
8331 if (nerrors > 3 && exprNodeList_size (vals) > 6)
8334 (message ("Additional initialization errors "
8335 "for %s not reported",
8336 exprNode_unparse (el)),
8338 exprNode_freeIniter (newel);
8343 exprNode_freeIniter (newel);
8348 exprNode_freeIniter (newel);
8353 cstring_free (istring);
8356 } end_exprNodeList_elements;
8359 else if (ctype_isStruct (ctype_realType (t1)))
8361 uentryList fields = ctype_getFields (t1);
8364 if (uentryList_size (fields) != exprNodeList_size (vals))
8366 if (uentryList_size (fields) > exprNodeList_size (vals))
8368 hasError = optgenerror
8370 message ("Initializer block for "
8371 "%s has %d field%&, but %s has %d field%&: %q",
8372 exprNode_unparse (el),
8373 exprNodeList_size (vals),
8375 uentryList_size (fields),
8376 exprNodeList_unparse (vals)),
8381 hasError = optgenerror
8383 message ("Initializer block for "
8384 "%s has %d field%&, but %s has %d field%&: %q",
8385 exprNode_unparse (el),
8386 exprNodeList_size (vals),
8388 uentryList_size (fields),
8389 exprNodeList_unparse (vals)),
8395 exprNodeList_elements (vals, oneval)
8397 uentry thisfield = uentryList_getN (fields, i);
8399 exprNode_fieldAccessAux (exprNode_fakeCopy (el),
8401 uentry_getName (thisfield));
8403 if (exprNode_isDefined (newel))
8405 if (exprNode_checkOneInit (newel, oneval))
8410 exprNode_freeIniter (newel);
8414 } end_exprNodeList_elements;
8417 /* evans 2001-12-30: added to fix bug reported by Jim Zelenka */
8418 else if (ctype_isUnion (ctype_realType (t1)))
8420 uentryList fields = ctype_getFields (t1);
8424 ** Union initializers set the first member always.
8427 DPRINTF (("Union initializer: %s / %s",
8428 exprNode_unparse (el), ctype_unparse (ctype_realType (t1))));
8430 if (exprNodeList_size (vals) != 1)
8432 hasError = optgenerror
8434 message ("Initializer block for union "
8435 "%s has %d elements, union initializers should have one element: %q",
8436 exprNode_unparse (el),
8437 exprNodeList_size (vals),
8438 exprNodeList_unparse (vals)),
8443 exprNode oneval = exprNodeList_head (vals);
8444 uentry thisfield = uentryList_getN (fields, i);
8446 exprNode_fieldAccessAux (exprNode_fakeCopy (el),
8448 uentry_getName (thisfield));
8450 if (exprNode_isDefined (newel))
8452 if (exprNode_checkOneInit (newel, oneval))
8457 exprNode_freeIniter (newel);
8463 hasError = optgenerror
8465 message ("Initializer block used for "
8466 "%s where %t is expected: %s",
8467 exprNode_unparse (el), t1, exprNode_unparse (val)),
8473 if (exprNode_isDefined (val))
8475 doAssign (el, val, TRUE);
8477 if (!exprNode_matchType (t1, val))
8479 hasError = gentypeerror
8481 message ("Initial value of %s is type %t, "
8483 exprNode_unparse (el),
8484 t2, t1, exprNode_unparse (val)),
8493 static /*@notnull@*/ exprNode
8494 exprNode_makeInitializationAux (/*@temp@*/ idDecl t)
8498 DPRINTF (("Initialization: %s", idDecl_unparse (t)));
8500 if (usymtab_exists (idDecl_observeId (t)))
8502 uentry ue = usymtab_lookup (idDecl_observeId (t));
8503 ret = exprNode_createId (ue);
8505 /*@i723 don't do this...but why? */
8507 ct = ctype_realishType (ret->typ);
8509 DPRINTF (("Type: %s", ctype_unparse (ret->typ)));
8511 if (ctype_isUnknown (ct))
8513 if (uentry_isAnyTag (ue))
8517 message ("%s used but not previously declared: %s",
8518 uentry_ekindName (ue),
8519 idDecl_getName (t)),
8527 message ("Variable has unknown (implicitly int) type: %s",
8528 idDecl_getName (t)),
8540 DPRINTF (("Unrecognized: %s", idDecl_unparse (t)));
8542 ue = uentry_makeUnrecognized (idDecl_observeId (t), fileloc_copy (g_currentloc));
8543 /*!! fileloc_copy (g_currentloc)); */
8544 /*@i32!!! should get error without this */
8546 ret = exprNode_fromIdentifierAux (ue);
8549 ** No error - this happens in old style declarations:
8553 message ("Unrecognized identifier in intializer: %s", idDecl_observeId (t)),
8560 exprData_free (ret->edata, ret->kind);
8561 ret->edata = exprData_undefined;
8562 ret->exitCode = XK_NEVERESCAPE;
8563 ret->mustBreak = FALSE;
8564 ret->kind = XPR_INIT;
8568 exprNode exprNode_makeEmptyInitialization (/*@only@*/ idDecl t)
8570 exprNode ret = exprNode_makeInitializationAux (t);
8571 llassert (ret->edata == exprData_undefined);
8572 ret->edata = exprData_makeInit (t, exprNode_undefined);
8576 exprNode exprNode_makeInitialization (/*@only@*/ idDecl t,
8577 /*@only@*/ exprNode e)
8579 uentry ue = usymtab_lookup (idDecl_observeId (t));
8580 exprNode ret = exprNode_makeInitializationAux (t);
8581 fileloc loc = exprNode_loc (e);
8583 DPRINTF (("initialization: %s = %s", idDecl_unparse (t), exprNode_unparse (e)));
8585 if (exprNode_isError (e))
8587 e = exprNode_createUnknown ();
8588 /* error: assume initializer is defined */
8589 sRef_setDefined (ret->sref, g_currentloc);
8590 ret->edata = exprData_makeInit (t, e);
8594 ctype ct = ctype_realishType (ret->typ);
8599 ** was addSafeUse --- what's the problem?
8601 ** int x = 3, y = x ?
8604 exprData_free (ret->edata, ret->kind);
8605 ret->edata = exprData_makeInit (t, e);
8606 DPRINTF (("ret: %s", exprNode_unparse (ret)));
8608 exprNode_checkUse (ret, e->sref, e->loc);
8610 if (ctype_isUnknown (e->typ) && uentry_isValid (ue))
8612 exprNode lhs = exprNode_createId (ue);
8615 ** static storage should be undefined before initializing
8618 if (uentry_isStatic (ue))
8620 sRef_setDefState (lhs->sref, SS_PARTIAL, fileloc_undefined);
8623 (void) exprNode_checkOneInit (lhs, e);
8625 if (uentry_isStatic (ue))
8627 sRef_setDefState (lhs->sref, SS_DEFINED, fileloc_undefined);
8630 exprNode_free (lhs);
8634 if (!exprNode_matchType (ct, e))
8636 if (exprNode_isZero (e) && ctype_isArrayPtr (ct))
8643 (exprNode_getType (e), e, exprNode_getType (ret), ret,
8645 ("Variable %q initialized to type %t, expects %t: %s",
8646 uentry_getName (ue), exprNode_getType (e),
8647 exprNode_getType (ret),
8648 exprNode_unparse (e)),
8654 if (uentry_isStatic (ue))
8656 sRef_setDefState (ret->sref, SS_PARTIAL, fileloc_undefined);
8659 if (exprNode_isStringLiteral (e)
8660 && (ctype_isArray (ct))
8661 && (ctype_isChar (ctype_realType (ctype_baseArrayPtr (ct)))))
8664 ** If t is a char [], the literal is copied.
8667 exprNode_checkStringLiteralLength (ct, e);
8668 sRef_setDefState (ret->sref, SS_DEFINED, e->loc);
8669 ret->val = multiVal_copy (e->val);
8671 sRef_setNullTerminatedState (ret->sref);
8673 if (multiVal_isDefined (e->val))
8675 cstring slit = multiVal_forceString (e->val);
8676 sRef_setLen (ret->sref, size_toInt (cstring_length (slit) + 1));
8679 if (ctype_isFixedArray (ct))
8681 sRef_setSize (ret->sref, size_toInt (ctype_getArraySize (ct)));
8686 doAssign (ret, e, TRUE);
8689 if (uentry_isStatic (ue))
8691 sRef_setDefState (ret->sref, SS_DEFINED, fileloc_undefined);
8695 if (context_inIterDef ())
8697 /* should check if it is yield */
8698 uentry_setUsed (ue, loc);
8705 exprNode_mergeUSs (ret, e);
8706 DPRINTF (("Ret: %s %p %p",
8707 exprNode_unparse (ret),
8708 ret->requiresConstraints,
8709 ret->ensuresConstraints));
8711 DPRINTF (("Ret: %s %s %s",
8712 exprNode_unparse (ret),
8713 constraintList_unparse (ret->requiresConstraints),
8714 constraintList_unparse (ret->ensuresConstraints)));
8718 exprNode exprNode_iter (/*@observer@*/ uentry name,
8719 /*@only@*/ exprNodeList alist,
8720 /*@only@*/ exprNode body,
8721 /*@observer@*/ uentry end)
8726 llassert (uentry_isValid (name));
8728 uentry_setUsed (name, exprNode_loc (body));
8730 ret = exprNode_createPartialCopy (body);
8731 iname = uentry_getName (name);
8733 if (uentry_isInvalid (end))
8735 llerror (FLG_ITERBALANCE,
8736 message ("Iter %s not balanced with end_%s", iname, iname));
8740 cstring ename = uentry_getName (end);
8742 if (!cstring_equalPrefixLit (ename, "end_"))
8744 llerror (FLG_ITERBALANCE, message ("Iter %s not balanced with end_%s: %s",
8745 iname, iname, ename));
8749 if (!cstring_equal (iname, cstring_suffix (ename, 4)))
8751 llerror (FLG_ITERBALANCE,
8752 message ("Iter %s not balanced with end_%s: %s",
8753 iname, iname, ename));
8757 cstring_free (ename);
8760 context_exitIterClause (body);
8762 ret->kind = XPR_ITER;
8763 ret->edata = exprData_makeIter (name, alist, body, end);
8765 if (uentry_isIter (name))
8767 (void) checkArgsReal (name, body,
8768 uentry_getParams (name), alist, TRUE, ret);
8771 cstring_free (iname);
8777 exprNode_iterNewId (/*@only@*/ cstring s)
8779 exprNode e = exprNode_new ();
8780 uentry ue = uentryList_getN (uentry_getParams (getCurrentIter ()), iterParamNo ());
8782 llassert (processingIterVars ());
8784 e->loc = context_getSaveLocation ();
8786 if (fileloc_isUndefined (e->loc))
8788 fileloc_free (e->loc);
8789 e->loc = fileloc_copy (g_currentloc);
8792 e->uses = sRefSet_new ();
8793 e->sets = sRefSet_new ();
8794 e->msets = sRefSet_new ();
8796 e->val = multiVal_unknown ();
8797 e->guards = guardSet_new ();
8798 e->sref = sRef_undefined;
8799 e->isJumpPoint = FALSE;
8800 e->exitCode = XK_NEVERESCAPE;
8802 /*> missing fields, detected by splint <*/
8803 e->canBreak = FALSE;
8804 e->mustBreak = FALSE;
8805 e->etext = cstring_undefined;
8807 if (uentry_isYield (ue))
8809 uentry uue = uentry_makeVariable (s, uentry_getType (ue),
8810 fileloc_copy (e->loc),
8814 uue = usymtab_supEntrySrefReturn (uue);
8816 sr = uentry_getSref (uue);
8817 sRef_mergeStateQuiet (sr, uentry_getSref (ue));
8818 sr = uentry_getSref (uue);
8819 sRef_setDefined (sr, e->loc);
8821 e->typ = uentry_getType (uue);
8823 e->edata = exprData_makeId (uue);
8824 uentry_setUsed (uue, g_currentloc);
8830 sRef_setGlobalScope ();
8831 uue = uentry_makeVariableLoc (s, ctype_unknown);
8833 e->typ = ctype_unknown;
8834 e->edata = exprData_makeId (uue);
8836 uentry_setUsed (uue, e->loc);
8837 uentry_setHasNameError (uue);
8839 if (context_getFlag (FLG_REPEATUNRECOG))
8841 uentry_markOwned (uue);
8845 usymtab_supGlobalEntry (uue);
8848 sRef_clearGlobalScope ();
8850 voptgenerror (FLG_UNRECOG, message ("Unrecognized identifier: %s", s),
8857 exprNode_defineConstraints(e);
8862 exprNode_iterExpr (/*@returned@*/ exprNode e)
8864 if (!processingIterVars ())
8866 llcontbuglit ("checkIterParam: not in iter");
8870 if (uentry_isYield (uentryList_getN (uentry_getParams (getCurrentIter ()),
8873 if (exprNode_isDefined (e))
8875 if (fileloc_isDefined (e->loc))
8879 message ("Yield parameter is not simple identifier: %s",
8880 exprNode_unparse (e)),
8887 message ("Yield parameter is not simple identifier: %s",
8888 exprNode_unparse (e)),
8898 exprNode_iterId (/*@observer@*/ uentry c)
8902 llassert (processingIterVars ());
8904 ue = uentryList_getN (uentry_getParams (getCurrentIter ()),
8907 if (uentry_isYield (ue))
8909 ctype ct = uentry_getType (ue);
8910 exprNode e = exprNode_createPlain (ct);
8911 cstring name = uentry_getName (c);
8912 uentry le = uentry_makeVariable (name, ct, fileloc_undefined, FALSE);
8914 uentry_setUsed (ue, g_currentloc);
8915 uentry_setHasNameError (ue);
8917 cstring_free (name);
8920 e->edata = exprData_makeId (le);
8921 e->loc = context_getSaveLocation ();
8922 e->sref = uentry_getSref (le);
8924 usymtab_supEntrySref (le);
8926 if (!context_inHeader ())
8930 message ("Yield parameter shadows local declaration: %q",
8931 uentry_getName (c)),
8932 fileloc_isDefined (e->loc) ? e->loc : g_currentloc))
8934 uentry_showWhereDeclared (c);
8941 return (exprNode_fromIdentifierAux (c));
8944 exprNode exprNode_iterStart (/*@observer@*/ uentry name, /*@only@*/ exprNodeList alist)
8946 exprNode ret = exprNode_create (ctype_unknown);
8948 ret->kind = XPR_ITERCALL;
8949 ret->edata = exprData_makeIterCall (name, alist);
8951 if (uentry_isIter (name))
8953 uentryList params = uentry_getParams (name);
8955 if (context_inIterDef ()
8956 && uentryList_size (params) == exprNodeList_size (alist))
8960 exprNodeList_elements (alist, arg)
8962 uentry parg = uentryList_getN (params, i);
8964 if (uentry_isYield (parg))
8966 uentry ue = exprNode_getUentry (arg);
8968 if (uentry_isValid (ue))
8975 } end_exprNodeList_elements;
8978 (void) checkArgsReal (name, ret, params, alist, TRUE, ret);
8979 checkUnspecCall (ret, params, alist);
8985 /*@exposed@*/ sRef exprNode_getSref (exprNode e)
8987 if (exprNode_isDefined (e))
8989 if (sRef_isInvalid (e->sref))
8992 e->sref = sRef_makeUnknown ();
8993 sRef_setAliasKind (e->sref, AK_ERROR, fileloc_undefined);
9004 return sRef_undefined;
9008 /*@observer@*/ cstring
9009 exprNode_unparseFirst (exprNode e)
9011 if (exprNode_isDefined (e))
9015 if (e->kind == XPR_STMTLIST
9016 || e->kind == XPR_COMMA || e->kind == XPR_COND)
9018 exprNode first = exprData_getPairA (e->edata);
9020 if (exprNode_isDefined (first))
9022 return (exprNode_unparseFirst (exprData_getPairA (e->edata)));
9026 return (cstring_makeLiteralTemp ("..."));
9030 ret = cstring_elide (exprNode_unparse (e), 20);
9031 cstring_markOwned (ret);
9037 return cstring_makeLiteralTemp ("<error>");
9041 /*@observer@*/ cstring
9042 exprNode_unparse (/*@temp@*/ exprNode e)
9044 if (exprNode_isError (e))
9046 return cstring_makeLiteralTemp ("<error>");
9049 if (cstring_isDefined (e->etext))
9055 cstring ret = exprNode_doUnparse (e);
9057 /*@-modifies@*/ /* benevolent */
9064 /*@observer@*/ fileloc
9065 exprNode_loc (exprNode e)
9067 if (exprNode_isError (e))
9069 return (g_currentloc);
9078 ** executes exprNode e
9079 ** recursively rexecutes as though in original parse using
9080 ** information in e->edata
9083 static /*@only@*/ exprNodeList exprNodeList_effect (exprNodeList e)
9085 exprNodeList ret = exprNodeList_new ();
9087 exprNodeList_elements (e, current)
9089 exprNodeList_addh (ret, exprNode_effect (current));
9090 } end_exprNodeList_elements;
9095 static /*@only@*/ exprNode exprNode_effect (exprNode e)
9096 /*@globals internalState@*/
9098 bool innerEffect = inEffect;
9104 context_clearJustPopped ();
9106 if (exprNode_isError (e))
9108 ret = exprNode_undefined;
9113 ** Turn off expose and dependent transfer checking.
9114 ** Need to pass exposed internal nodes,
9115 ** [ copying would be a waste! ]
9116 ** [ Actually, I think I wasted a lot more time than its worth ]
9117 ** [ trying to do this. ]
9121 /*@-observertrans@*/
9122 /*@-dependenttrans@*/
9129 ret = exprNode_addParens (exprData_getUopTok (data),
9130 exprNode_effect (exprData_getUopNode (data)));
9133 ret = exprNode_assign (exprNode_effect (exprData_getOpA (data)),
9134 exprNode_effect (exprData_getOpB (data)),
9135 exprData_getOpTok (data));
9138 ret = exprNode_undefined;
9141 ret = exprNode_functionCall (exprNode_effect (exprData_getFcn (data)),
9142 exprNodeList_effect (exprData_getArgs (data)));
9155 cstring id = exprData_getId (data);
9156 uentry ue = usymtab_lookupSafe (id);
9158 ret = exprNode_fromIdentifierAux (ue);
9159 ret->loc = fileloc_update (ret->loc, e->loc);
9166 ret = exprNode_arrayFetch (exprNode_effect (exprData_getPairA (data)),
9167 exprNode_effect (exprData_getPairB (data)));
9171 ** evans 2002-03-15: for && and ||, need to do the guards also
9172 ** this is what cgrammar.y does - should be
9173 ** able to avoid duplication, but need to
9174 ** time with grammar productions.
9177 DPRINTF (("Effect: %s", exprNode_unparse (e)));
9179 if (lltok_getTok (exprData_getOpTok (data)) == AND_OP)
9181 exprNode e1 = exprNode_effect (exprData_getOpA (data));
9183 exprNode_produceGuards (e1);
9184 context_enterAndClause (e1);
9185 e2 = exprNode_effect (exprData_getOpB (data));
9187 ret = exprNode_op (e1, e2,
9188 exprData_getOpTok (data));
9190 context_exitAndClause (ret, e2);
9192 else if (lltok_getTok (exprData_getOpTok (data)) == OR_OP)
9194 exprNode e1 = exprNode_effect (exprData_getOpA (data));
9196 exprNode_produceGuards (e1);
9197 context_enterOrClause (e1);
9198 e2 = exprNode_effect (exprData_getOpB (data));
9200 ret = exprNode_op (e1, e2,
9201 exprData_getOpTok (data));
9203 context_exitOrClause (ret, e2);
9207 ret = exprNode_op (exprNode_effect (exprData_getOpA (data)),
9208 exprNode_effect (exprData_getOpB (data)),
9209 exprData_getOpTok (data));
9214 ret = exprNode_postOp (exprNode_effect (exprData_getUopNode (data)),
9215 exprData_getUopTok (data));
9218 ret = exprNode_preOp (exprNode_effect (exprData_getUopNode (data)),
9219 exprData_getUopTok (data));
9231 ret = exprNode_vaArg (exprData_getCastTok (data),
9232 exprNode_effect (exprData_getCastNode (data)),
9233 exprData_getCastType (data));
9237 ret = exprNode_cast (exprData_getCastTok (data),
9238 exprNode_effect (exprData_getCastNode (data)),
9239 exprData_getCastType (data));
9242 ret = exprNode_iterStart (exprData_getIterCallIter (data),
9244 (exprData_getIterCallArgs (data)));
9248 ret = exprNode_iter (exprData_getIterSname (data),
9249 exprNodeList_effect (exprData_getIterAlist (data)),
9250 exprNode_effect (exprData_getIterBody (data)),
9251 exprData_getIterEname (data));
9255 ret = exprNode_for (exprNode_effect (exprData_getPairA (data)),
9256 exprNode_effect (exprData_getPairB (data)));
9260 ret = exprNode_forPred (exprNode_effect (exprData_getTripleInit (data)),
9261 exprNode_effect (exprData_getTripleTest (data)),
9262 exprNode_effect (exprData_getTripleInc (data)));
9266 ret = exprNode_createTok (exprData_getTok (data));
9270 ret = exprNode_goto (exprData_getLiteral (data));
9271 ret->loc = fileloc_update (ret->loc, e->loc);
9275 ret = exprNode_continue (exprData_getTok (data), QSAFEBREAK);
9279 ret = exprNode_break (exprData_getTok (data), QSAFEBREAK);
9283 ret = exprNode_return (exprNode_effect (exprData_getSingle (data)));
9286 case XPR_NULLRETURN:
9287 ret = exprNode_nullReturn (exprData_getTok (data));
9291 ret = exprNode_comma (exprNode_effect (exprData_getPairA (data)),
9292 exprNode_effect (exprData_getPairB (data)));
9296 ret = exprNode_cond (exprNode_effect (exprData_getTriplePred (data)),
9297 exprNode_effect (exprData_getTripleTrue (data)),
9298 exprNode_effect (exprData_getTripleFalse (data)));
9301 ret = exprNode_if (exprNode_effect (exprData_getPairA (data)),
9302 exprNode_effect (exprData_getPairB (data)));
9306 ret = exprNode_ifelse (exprNode_effect (exprData_getTriplePred (data)),
9307 exprNode_effect (exprData_getTripleTrue (data)),
9308 exprNode_effect (exprData_getTripleFalse (data)));
9311 ret = exprNode_whilePred (exprData_getSingle (data));
9315 ret = exprNode_while (exprNode_effect (exprData_getPairA (data)),
9316 exprNode_effect (exprData_getPairB (data)));
9320 ret = exprNode_doWhile (exprNode_effect (exprData_getPairA (data)),
9321 exprNode_effect (exprData_getPairB (data)));
9325 ret = exprNode_makeBlock (exprNode_effect (exprData_getSingle (data)));
9329 ret = exprNode_statement (exprNode_effect (exprData_getUopNode (data)),
9330 exprData_getUopTok (data));
9334 ret = exprNode_concat (exprNode_effect (exprData_getPairA (data)),
9335 exprNode_effect (exprData_getPairB (data)));
9340 ret = exprNode_caseMarker
9341 (exprNode_effect (exprData_getSingle (data)),
9347 ret = exprNode_createTok (exprData_getTok (data));
9351 ret = exprNode_switch (exprNode_effect (exprData_getPairA (data)),
9352 exprNode_effect (exprData_getPairB (data)));
9356 ret = exprNode_makeInitialization
9357 (exprData_getInitId (data),
9358 exprNode_effect (exprData_getInitNode (data)));
9362 ret = exprNode_fieldAccessAux
9363 (exprNode_effect (exprData_getFieldNode (data)),
9364 exprNode_loc (exprData_getFieldNode (data)),
9365 cstring_copy (exprData_getFieldName (data)));
9369 ret = exprNode_arrowAccessAux
9370 (exprNode_effect (exprData_getFieldNode (data)),
9371 exprNode_loc (exprData_getFieldNode (data)),
9372 cstring_copy (exprData_getFieldName (data)));
9375 case XPR_STRINGLITERAL:
9389 /*@=observertrans@*/
9391 /*@=dependenttrans@*/
9402 static /*@observer@*/ cstring exprNode_rootVarName (exprNode e)
9407 if (exprNode_isError (e))
9409 return cstring_undefined;
9417 ret = exprNode_rootVarName (exprData_getUopNode (data));
9420 ret = exprNode_rootVarName (exprData_getOpA (data));
9424 ret = exprData_getId (data);
9427 ret = idDecl_getName (exprData_getInitId (data));
9452 case XPR_NULLRETURN:
9474 case XPR_STRINGLITERAL:
9475 ret = cstring_undefined;
9482 static /*@only@*/ cstring exprNode_doUnparse (exprNode e)
9487 if (exprNode_isError (e))
9489 static /*@only@*/ cstring error = cstring_undefined;
9491 if (!cstring_isDefined (error))
9493 error = cstring_makeLiteral ("<error>");
9504 ret = message ("(%s)", exprNode_unparse (exprData_getUopNode (e->edata)));
9507 ret = message ("%s %s %s",
9508 exprNode_unparse (exprData_getOpA (data)),
9509 lltok_unparse (exprData_getOpTok (data)),
9510 exprNode_unparse (exprData_getOpB (data)));
9513 ret = message ("%s(%q)",
9514 exprNode_unparse (exprData_getFcn (data)),
9515 exprNodeList_unparse (exprData_getArgs (data)));
9518 ret = message ("{ %q }", exprNodeList_unparse (exprData_getArgs (data)));
9521 ret = cstring_undefined;
9524 ret = message ("%s:", exprData_getId (data));
9528 ret = cstring_copy (exprData_getId (data));
9531 ret = message ("%s[%s]", exprNode_unparse (exprData_getPairA (data)),
9532 exprNode_unparse (exprData_getPairB (data)));
9535 ret = message ("<body>");
9538 ret = message ("%s %s %s",
9539 exprNode_unparse (exprData_getOpA (data)),
9540 lltok_unparse (exprData_getOpTok (data)),
9541 exprNode_unparse (exprData_getOpB (data)));
9545 ret = message ("%s%s",
9546 lltok_unparse (exprData_getUopTok (data)),
9547 exprNode_unparse (exprData_getUopNode (data)));
9551 ret = message ("%s%s",
9552 exprNode_unparse (exprData_getUopNode (data)),
9553 lltok_unparse (exprData_getUopTok (data)));
9557 ret = message ("offsetof(%s,%q)",
9558 ctype_unparse (qtype_getType (exprData_getOffsetType (data))),
9559 cstringList_unparseSep (exprData_getOffsetName (data), cstring_makeLiteralTemp (".")));
9563 ret = message ("sizeof(%s)", ctype_unparse (qtype_getType (exprData_getType (data))));
9567 ret = message ("sizeof(%s)", exprNode_unparse (exprData_getSingle (data)));
9571 ret = message ("alignof(%s)", ctype_unparse (qtype_getType (exprData_getType (data))));
9575 ret = message ("alignof(%s)", exprNode_unparse (exprData_getSingle (data)));
9579 ret = message ("va_arg(%s, %q)",
9580 exprNode_unparse (exprData_getCastNode (data)),
9581 qtype_unparse (exprData_getCastType (data)));
9585 ret = message ("%q(%q)",
9586 uentry_getName (exprData_getIterCallIter (data)),
9587 exprNodeList_unparse (exprData_getIterCallArgs (data)));
9590 ret = message ("%q(%q) %s %q",
9591 uentry_getName (exprData_getIterSname (data)),
9592 exprNodeList_unparse (exprData_getIterAlist (data)),
9593 exprNode_unparse (exprData_getIterBody (data)),
9594 uentry_getName (exprData_getIterEname (data)));
9597 ret = message ("(%q)%s",
9598 qtype_unparse (exprData_getCastType (data)),
9599 exprNode_unparse (exprData_getCastNode (data)));
9603 ret = message ("%s %s",
9604 exprNode_unparse (exprData_getPairA (data)),
9605 exprNode_unparse (exprData_getPairB (data)));
9609 ret = message ("for (%s; %s; %s)",
9610 exprNode_unparse (exprData_getTripleInit (data)),
9611 exprNode_unparse (exprData_getTripleTest (data)),
9612 exprNode_unparse (exprData_getTripleInc (data)));
9616 ret = message ("goto %s", exprData_getLiteral (data));
9620 ret = cstring_makeLiteral ("continue");
9624 ret = cstring_makeLiteral ("break");
9628 ret = message ("return %s", exprNode_unparse (exprData_getSingle (data)));
9631 case XPR_NULLRETURN:
9632 ret = cstring_makeLiteral ("return");
9636 ret = message ("%s, %s",
9637 exprNode_unparse (exprData_getPairA (data)),
9638 exprNode_unparse (exprData_getPairB (data)));
9642 ret = message ("%s ? %s : %s",
9643 exprNode_unparse (exprData_getTriplePred (data)),
9644 exprNode_unparse (exprData_getTripleTrue (data)),
9645 exprNode_unparse (exprData_getTripleFalse (data)));
9648 ret = message ("if (%s) %s",
9649 exprNode_unparse (exprData_getPairA (data)),
9650 exprNode_unparse (exprData_getPairB (data)));
9654 ret = message ("if (%s) %s else %s",
9655 exprNode_unparse (exprData_getTriplePred (data)),
9656 exprNode_unparse (exprData_getTripleTrue (data)),
9657 exprNode_unparse (exprData_getTripleFalse (data)));
9660 ret = message ("while (%s) %s",
9661 exprNode_unparse (exprData_getPairA (data)),
9662 exprNode_unparse (exprData_getPairB (data)));
9666 ret = cstring_copy (exprNode_unparse (exprData_getSingle (data)));
9670 ret = cstring_copy (lltok_unparse (exprData_getTok (data)));
9674 ret = message ("do { %s } while (%s)",
9675 exprNode_unparse (exprData_getPairB (data)),
9676 exprNode_unparse (exprData_getPairA (data)));
9680 ret = message ("{ %s }", exprNode_unparse (exprData_getSingle (data)));
9681 /* evans 2002-02-20 was unparseFirst! */
9685 ret = message ("%s;", exprNode_unparse (exprData_getUopNode (data)));
9689 if (exprNode_isStatement (exprData_getPairA (data)))
9692 ** statement expressions already print the ;
9695 ret = message ("%s %s",
9696 exprNode_unparse (exprData_getPairA (data)),
9697 exprNode_unparse (exprData_getPairB (data)));
9701 ret = message ("%s; %s",
9702 exprNode_unparse (exprData_getPairA (data)),
9703 exprNode_unparse (exprData_getPairB (data)));
9709 ret = cstring_makeLiteral ("default:");
9713 ret = message ("switch (%s) %s",
9714 exprNode_unparse (exprData_getPairA (data)),
9715 exprNode_unparse (exprData_getPairB (data)));
9720 ret = message ("case %s:",
9721 exprNode_unparse (exprData_getSingle (data)));
9725 if (exprNode_isError (exprData_getInitNode (data)))
9727 ret = message ("%q", idDecl_unparseC (exprData_getInitId (data)));
9731 ret = message ("%q = %s",
9732 idDecl_unparseC (exprData_getInitId (data)),
9733 exprNode_unparse (exprData_getInitNode (data)));
9738 ret = message ("%s.%s",
9739 exprNode_unparse (exprData_getFieldNode (data)),
9740 exprData_getFieldName (data));
9744 ret = message ("%s->%s",
9745 exprNode_unparse (exprData_getFieldNode (data)),
9746 exprData_getFieldName (data));
9749 case XPR_STRINGLITERAL:
9750 if (ctype_isWideString (e->typ))
9752 ret = message ("L\"%s\"", exprData_getLiteral (data));
9756 ret = message ("\"%s\"", exprData_getLiteral (data));
9761 ret = cstring_copy (exprData_getLiteral (data));
9765 ret = cstring_makeLiteral ("<node>");
9773 exprNode_isInitializer (exprNode e)
9775 return (exprNode_isDefined (e)
9776 && e->kind == XPR_INIT);
9780 exprNode_isCharLiteral (exprNode e)
9782 if (exprNode_isDefined (e))
9784 return (multiVal_isChar (exprNode_getValue (e)));
9793 exprNode_isNumLiteral (exprNode e)
9795 if (exprNode_isDefined (e))
9797 return (multiVal_isInt (exprNode_getValue (e)));
9806 exprNode_isFalseConstant (exprNode e)
9808 if (exprNode_isDefined (e))
9810 cstring s = exprNode_rootVarName (e);
9812 if (cstring_equal (s, context_getFalseName ()))
9822 exprNode_matchLiteral (ctype expected, exprNode e)
9824 if (exprNode_isDefined (e))
9826 multiVal m = exprNode_getValue (e);
9828 if (multiVal_isDefined (m))
9830 if (multiVal_isInt (m))
9832 long int val = multiVal_forceInt (m);
9834 if (ctype_isNumAbstract (expected)
9835 && context_flagOn (FLG_NUMABSTRACTLIT, exprNode_loc (e)))
9840 if (ctype_isDirectBool (ctype_realishType (expected)))
9844 return FALSE; /* really?! return TRUE; allow use of 0 for FALSE */
9852 if (ctype_isRealInt (expected))
9855 ** unsigned <- [ constant >= 0 is okay ]
9858 if (ctype_isUnsigned (expected))
9867 ** No checks on sizes of integers...maybe add
9871 DPRINTF (("Here: %s => %s", exprNode_unparse (e), ctype_unparse (expected)));
9872 DPRINTF (("Type: %s / %s", ctype_unparse (exprNode_getType (e)),
9873 bool_unparse (ctype_isInt (exprNode_getType (e)))));
9875 if (context_getFlag (FLG_NUMLITERAL)
9876 && (ctype_isRegularInt (exprNode_getType (e)) || val == 0)) {
9882 return FALSE; /* evs 2000-05-17: previously, always returned TRUE */
9886 else if (ctype_isChar (expected))
9890 else if (ctype_isArrayPtr (expected))
9893 ** evans 2001-10-14: We allow 0 to match any pointer, but only if the type matches or is void *.
9898 if (ctype_match (exprNode_getType (e), expected)
9899 || ctype_isVoidPointer (exprNode_getType (e)))
9909 else if (ctype_isAnyFloat (expected))
9911 return (context_getFlag (FLG_NUMLITERAL));
9918 else if (multiVal_isDouble (m))
9920 if (ctype_isAnyFloat (expected))
9925 else if (multiVal_isChar (m))
9927 char val = multiVal_forceChar (m);
9929 if (ctype_isChar (expected))
9931 if (ctype_isUnsigned (expected) && ((int)val) < 0)
9952 exprNode_matchType (ctype expected, exprNode e)
9956 if (!exprNode_isDefined (e)) return TRUE;
9958 actual = ctype_realishType (exprNode_getType (e));
9960 if (ctype_match (ctype_realishType (expected), actual))
9965 llassert (!exprNode_isError (e));
9966 return (exprNode_matchLiteral (expected, e));
9970 exprNode_matchTypes (exprNode e1, exprNode e2)
9975 if (!exprNode_isDefined (e1)) return TRUE;
9976 if (!exprNode_isDefined (e2)) return TRUE;
9979 ** realish type --- keep bools, bools
9982 t1 = ctype_realishType (exprNode_getType (e1));
9983 t2 = ctype_realishType (exprNode_getType (e2));
9985 if (ctype_match (t1, t2))
9990 DPRINTF (("Matching literal! %s %s %s %s",
9991 ctype_unparse (t1), exprNode_unparse (e2),
9992 ctype_unparse (t2), exprNode_unparse (e1)));
9994 return (exprNode_matchLiteral (t1, e2) || exprNode_matchLiteral (t2, e1));
10002 exprNode_matchArgType (ctype ct, exprNode e)
10006 if (!exprNode_isDefined (e))
10011 et = ctype_realType (exprNode_getType (e));
10013 if (ctype_matchArg (ct, et)) return TRUE;
10015 llassert (!exprNode_isError (e));
10016 return (exprNode_matchLiteral (ct, e));
10019 static /*@only@*/ exprNodeSList
10020 exprNode_flatten (/*@dependent@*/ exprNode e) /*@*/
10022 if (exprNode_isDefined (e))
10024 if (e->kind == XPR_STMTLIST)
10026 return (exprNodeSList_append
10027 (exprNode_flatten (exprData_getPairA (e->edata)),
10028 exprNode_flatten (exprData_getPairB (e->edata))));
10030 else if (e->kind == XPR_BLOCK)
10032 return (exprNode_flatten (exprData_getSingle (e->edata)));
10036 return (exprNodeSList_singleton (e));
10040 return exprNodeSList_new ();
10043 static /*@exposed@*/ exprNode
10044 exprNode_lastStatement (/*@returned@*/ exprNode e)
10046 if (exprNode_isDefined (e))
10048 if (e->kind == XPR_STMTLIST)
10050 exprNode b = exprData_getPairB (e->edata);
10052 if (exprNode_isDefined (b))
10054 return exprNode_lastStatement (b);
10058 return exprNode_lastStatement (exprData_getPairA (e->edata));
10061 else if (e->kind == XPR_BLOCK)
10063 return (exprNode_lastStatement (exprData_getSingle (e->edata)));
10071 return exprNode_undefined;
10074 static /*@exposed@*/ exprNode
10075 exprNode_firstStatement (/*@returned@*/ exprNode e)
10077 if (exprNode_isDefined (e))
10079 if (e->kind == XPR_STMTLIST)
10081 exprNode b = exprData_getPairA (e->edata);
10083 if (exprNode_isDefined (b))
10085 return exprNode_firstStatement (b);
10089 return exprNode_firstStatement (exprData_getPairB (e->edata));
10092 else if (e->kind == XPR_BLOCK)
10094 return (exprNode_firstStatement (exprData_getSingle (e->edata)));
10102 return exprNode_undefined;
10106 exprNode_mergeUSs (exprNode res, exprNode other)
10108 if (exprNode_isDefined (res) && exprNode_isDefined (other))
10110 res->msets = sRefSet_union (res->msets, other->msets);
10111 res->sets = sRefSet_union (res->sets, other->sets);
10112 res->uses = sRefSet_union (res->uses, other->uses);
10117 exprNode_mergeCondUSs (exprNode res, exprNode other1, exprNode other2)
10119 if (exprNode_isDefined (res))
10121 if (exprNode_isDefined (other1))
10123 res->sets = sRefSet_union (res->sets, other1->sets);
10124 res->msets = sRefSet_union (res->msets, other1->msets);
10125 res->uses = sRefSet_union (res->uses, other1->uses);
10127 if (exprNode_isDefined (other2))
10129 res->sets = sRefSet_union (res->sets, other2->sets);
10130 res->msets = sRefSet_union (res->msets, other2->msets);
10131 res->uses = sRefSet_union (res->uses, other2->uses);
10137 ** modifies e->uses
10139 ** Reports errors is s is not defined.
10143 exprNode_addUse (exprNode e, /*@exposed@*/ sRef s)
10145 if (exprNode_isDefined (e))
10147 e->uses = sRefSet_insert (e->uses, s);
10152 exprNode_checkUse (exprNode e, /*@exposed@*/ sRef s, fileloc loc)
10154 if (sRef_isKnown (s) && !sRef_isConst (s))
10157 ** need to check all outer types are useable
10160 DPRINTF (("Check use: %s / %s",
10161 exprNode_unparse (e), sRef_unparse (s)));
10163 exprNode_addUse (e, s);
10165 if (!context_inProtectVars ())
10168 ** only report the deepest error
10171 sRef errorRef = sRef_undefined;
10172 sRef lastRef = sRef_undefined;
10173 bool deadRef = FALSE;
10174 bool unuseable = FALSE;
10175 bool errorMaybe = FALSE;
10177 while (sRef_isValid (s) && sRef_isKnown (s))
10179 ynm readable = sRef_isValidLvalue (s);
10181 DPRINTF (("Readable: %s / %s",
10182 sRef_unparseFull (s), ynm_unparse (readable)));
10184 if (!(ynm_toBoolStrict (readable)))
10186 if (ynm_isMaybe (readable))
10188 lastRef = errorRef;
10190 DPRINTF (("Setting ERROR: %s", sRef_unparseFull (s)));
10191 deadRef = sRef_isPossiblyDead (errorRef);
10192 unuseable = sRef_isUnuseable (errorRef);
10197 lastRef = errorRef;
10199 DPRINTF (("Setting ERROR: %s", sRef_unparseFull (s)));
10200 deadRef = sRef_isDead (errorRef);
10201 unuseable = sRef_isUnuseable (errorRef);
10202 errorMaybe = FALSE;
10206 if (!sRef_isPartial (s))
10208 DPRINTF (("Defining! %s", sRef_unparseFull (s)));
10209 sRef_setDefined (s, loc);
10210 DPRINTF (("Defining! %s", sRef_unparseFull (s)));
10215 s = sRef_getBaseSafe (s);
10218 if (sRef_isValid (errorRef))
10220 if (sRef_isValid (lastRef) && sRef_isField (lastRef)
10221 && sRef_isPointer (errorRef))
10223 errorRef = lastRef;
10224 DPRINTF (("errorRef: %s", sRef_unparseFull (errorRef)));
10229 if (sRef_isThroughArrayFetch (errorRef))
10232 (FLG_STRICTUSERELEASED,
10233 message ("%q %q may be used after being released",
10234 sRef_unparseKindNamePlain (errorRef),
10235 sRef_unparse (errorRef)),
10238 sRef_showRefKilled (errorRef);
10240 if (sRef_isKept (errorRef))
10242 sRef_clearAliasState (errorRef, loc);
10248 DPRINTF (("HERE: %s", sRef_unparseFull (errorRef)));
10252 message ("%q %q %qused after being released",
10253 sRef_unparseKindNamePlain (errorRef),
10254 sRef_unparse (errorRef),
10255 cstring_makeLiteral (errorMaybe
10256 ? "may be " : "")),
10259 sRef_showRefKilled (errorRef);
10261 if (sRef_isKept (errorRef))
10263 sRef_clearAliasState (errorRef, loc);
10268 else if (unuseable)
10272 message ("%q %q%qused in inconsistent state",
10273 sRef_unparseKindName (errorRef),
10274 sRef_unparseOpt (errorRef),
10275 cstring_makeLiteral (errorMaybe ? "may be " : "")),
10278 sRef_showStateInconsistent (errorRef);
10283 DPRINTF (("HERE: %s", sRef_unparseFull (errorRef)));
10287 message ("%q %q%qused before definition",
10288 sRef_unparseKindName (errorRef),
10289 sRef_unparseOpt (errorRef),
10290 cstring_makeLiteral (errorMaybe ? "may be " : "")),
10296 DPRINTF (("Error: %s", sRef_unparseFull (errorRef)));
10299 sRef_setDefined (errorRef, loc);
10301 if (sRef_isAddress (errorRef))
10303 sRef_setDefined (sRef_getRootBase (errorRef), loc);
10305 } /* end is error */
10313 checkSafeUse (exprNode e, /*@exposed@*/ sRef s)
10315 if (exprNode_isDefined (e) && sRef_isKnown (s))
10317 e->uses = sRefSet_insert (e->uses, s);
10322 exprNode_checkSetAny (exprNode e, /*@dependent@*/ cstring name)
10324 if (exprNode_isDefined (e))
10326 e->sets = sRefSet_insert (e->sets, sRef_makeUnconstrained (name));
10331 exprNode_checkSet (exprNode e, /*@exposed@*/ sRef s)
10333 sRef defines = sRef_undefined;
10335 if (sRef_isValid (s) && !sRef_isNothing (s))
10337 uentry ue = sRef_getBaseUentry (s);
10339 if (uentry_isValid (ue))
10341 uentry_setLset (ue);
10344 if (!ynm_toBoolStrict (sRef_isWriteable (s)))
10346 voptgenerror (FLG_USEDEF,
10347 message ("Attempt to set unuseable storage: %q",
10352 if (sRef_isMeaningful (s))
10354 if (sRef_isDead (s))
10356 sRef base = sRef_getBaseSafe (s);
10358 if (sRef_isValid (base)
10359 && sRef_isDead (base))
10361 sRef_setPartial (s, exprNode_loc (e));
10364 defines = s; /* okay - modifies for only param */
10366 else if (sRef_isPartial (s))
10368 sRef eref = exprNode_getSref (e);
10370 if (!sRef_isPartial (eref))
10373 ** should do something different here???
10376 sRef_setDefinedComplete (eref, exprNode_loc (e));
10380 sRef_setPartialDefinedComplete (eref, exprNode_loc (e));
10383 if (sRef_isMeaningful (eref))
10392 else if (sRef_isAllocated (s))
10394 sRef eref = exprNode_getSref (e);
10397 if (!sRef_isAllocated (eref))
10399 sRef_setDefinedComplete (eref, exprNode_loc (e));
10403 sRef base = sRef_getBaseSafe (eref);
10405 if (sRef_isValid (base))
10407 sRef_setPdefined (base, exprNode_loc (e));
10415 sRef_setDefinedNCComplete (s, exprNode_loc (e));
10420 else /* not meaningful...but still need to insert it */
10426 if (exprNode_isDefined (e) && sRef_isValid (defines))
10428 e->sets = sRefSet_insert (e->sets, defines);
10433 exprNode_checkMSet (exprNode e, /*@exposed@*/ sRef s)
10435 if (sRef_isValid (s) && !sRef_isNothing (s))
10437 uentry ue = sRef_getBaseUentry (s);
10439 if (uentry_isValid (ue))
10441 uentry_setLset (ue);
10444 if (!ynm_toBoolStrict (sRef_isWriteable (s)))
10446 voptgenerror (FLG_USEDEF,
10447 message ("Attempt to set unuseable storage: %q", sRef_unparse (s)),
10451 if (sRef_isMeaningful (s))
10453 sRef_setDefinedComplete (s, exprNode_loc (e));
10456 if (exprNode_isDefined (e))
10458 e->msets = sRefSet_insert (e->msets, s);
10464 checkUnspecCall (/*@notnull@*/ /*@dependent@*/ exprNode fcn, uentryList params, exprNodeList args)
10466 checkAnyCall (fcn, cstring_undefined, params, args,
10467 FALSE, sRefSet_undefined, FALSE, 0);
10471 checkOneArg (uentry ucurrent, /*@notnull@*/ exprNode current,
10472 /*@dependent@*/ exprNode fcn, bool isSpec, int argno, int totargs)
10476 if (uentry_isYield (ucurrent))
10478 sRef_setDefined (exprNode_getSref (current), exprNode_loc (current));
10479 exprNode_checkSet (current, current->sref);
10483 if (uentry_isSefParam (ucurrent))
10485 sRefSet sets = current->sets;
10486 sRef ref = exprNode_getSref (current);
10488 if (sRef_isMacroParamRef (ref))
10490 uentry ue = sRef_getUentry (ref);
10492 if (!uentry_isSefParam (ue))
10497 ("Parameter %d to %s is declared sef, but "
10498 "the argument is a macro parameter declared "
10500 argno, exprNode_unparse (fcn),
10501 exprNode_unparse (current)),
10502 exprNode_loc (current));
10506 if (!sRefSet_isEmpty (sets))
10508 sRefSet reported = sRefSet_undefined;
10510 sRefSet_realElements (current->sets, el)
10512 if (sRefSet_isSameNameMember (reported, el))
10514 ; /* don't report again */
10518 if (sRef_isUnconstrained (el))
10523 ("Parameter %d to %s is declared sef, but "
10524 "the argument calls unconstrained function %s "
10525 "(no guarantee it will not modify something): %s",
10526 argno, exprNode_unparse (fcn),
10527 sRef_unconstrainedName (el),
10528 exprNode_unparse (current)),
10529 exprNode_loc (current));
10536 ("Parameter %d to %s is declared sef, but "
10537 "the argument may modify %q: %s",
10538 argno, exprNode_unparse (fcn),
10540 exprNode_unparse (current)),
10541 exprNode_loc (current));
10544 } end_sRefSet_realElements;
10548 transferChecks_passParam (current, ucurrent, isSpec, fcn, argno, totargs);
10549 exprNode_mergeUSs (fcn, current);
10554 checkAnyCall (/*@dependent@*/ exprNode fcn,
10555 /*@dependent@*/ cstring fname,
10558 bool hasMods, sRefSet mods,
10563 int nargs = exprNodeList_size (args);
10568 ** concat all args ud's to f, add each arg sref as a use unless
10569 ** it was specified as "out", in which case it is a def.
10572 uentryList_reset (pn);
10575 ** aliasing checks:
10577 ** if paramn is only or unique, no other arg may alias argn
10580 exprNodeList_elements (args, current)
10584 if (exprNode_isDefined (current))
10586 if ((!uentryList_isUndefined (pn) && !uentryList_isFinished (pn)))
10588 uentry ucurrent = uentryList_current (pn);
10590 if (specialArgs == 0
10591 || (paramno < specialArgs))
10593 checkOneArg (ucurrent, current, fcn, isSpec, paramno, nargs);
10595 if (context_maybeSet (FLG_ALIASUNIQUE))
10597 if (uentry_isOnly (ucurrent)
10598 || uentry_isUnique (ucurrent))
10600 checkUniqueParams (fcn, current, args,
10601 paramno, ucurrent);
10606 else /* uentry is undefined */
10608 if (specialArgs == 0)
10610 exprNode_checkUseParam (current);
10613 exprNode_mergeUSs (fcn, current);
10616 uentryList_advanceSafe (pn);
10617 } end_exprNodeList_elements;
10623 sRefSet_allElements (mods, s)
10626 sRef rb = sRef_getRootBase (s);
10628 if (sRef_isFileOrGlobalScope (rb))
10630 context_usedGlobal (rb);
10633 fb = sRef_fixBaseParam (s, args);
10635 if (!sRef_isMacroParamRef (fb))
10637 if (sRef_isNothing (fb))
10643 if (sRef_isValid (fb))
10645 uentry ue = sRef_getBaseUentry (s);
10647 if (uentry_isValid (ue))
10649 uentry_setLset (ue);
10653 fcn->sets = sRefSet_insert (fcn->sets, fb);
10656 sRef_clearDerivedComplete (s);
10657 } end_sRefSet_allElements;
10663 if (context_hasMods ())
10665 if (context_maybeSet (FLG_MODUNCON))
10669 message ("Undetected modification possible "
10670 "from call to unconstrained function %s: %s",
10672 exprNode_unparse (fcn)),
10673 exprNode_loc (fcn));
10678 if (context_maybeSet (FLG_MODUNCONNOMODS)
10679 && !(context_inIterDef () || context_inIterEnd ()))
10682 (FLG_MODUNCONNOMODS,
10683 message ("Undetected modification possible "
10684 "from call to unconstrained function %s: %s",
10686 exprNode_unparse (fcn)),
10687 exprNode_loc (fcn));
10691 exprNode_checkSetAny (fcn, fname);
10695 void exprNode_checkUseParam (exprNode current)
10697 if (exprNode_isDefined (current))
10699 exprNode_checkUse (current, current->sref, current->loc);
10704 checkNumerics (ctype tr1, ctype tr2, ctype te1, ctype te2,
10705 /*@notnull@*/ exprNode e1, /*@notnull@*/ exprNode e2,
10710 if (!ctype_match (tr1, tr2))
10712 if ((ctype_isRealInt (tr1) || ctype_isReal (tr1)) &&
10713 (ctype_isRealInt (tr2) || ctype_isReal (tr2)))
10715 DPRINTF (("No error: [%s] %s / [%s] %s",
10716 exprNode_unparse (e1), ctype_unparse (tr1),
10717 exprNode_unparse (e2), ctype_unparse (tr2)));
10719 ret = ctype_biggerType (tr1, tr2);
10723 if (ctype_isNumAbstract (tr1)
10724 && exprNode_isNumLiteral (e2)
10725 && context_flagOn (FLG_NUMABSTRACTLIT, e1->loc))
10727 ret = tr1; /* No error */
10729 else if (ctype_isNumAbstract (tr2)
10730 && exprNode_isNumLiteral (e1)
10731 && context_flagOn (FLG_NUMABSTRACTLIT, e1->loc))
10739 message ("Incompatible types for %s (%s, %s): %s %s %s",
10740 lltok_unparse (op),
10741 ctype_unparse (te1),
10742 ctype_unparse (te2),
10743 exprNode_unparse (e1), lltok_unparse (op),
10744 exprNode_unparse (e2)),
10747 ret = ctype_unknown;
10751 ret = ctype_biggerType (tr1, tr2);
10758 if (ctype_isNumAbstract (tr1))
10762 else if (ctype_isForceRealNumeric (&tr1)
10763 && ctype_isForceRealNumeric (&tr2))
10765 ret = ctype_resolveNumerics (tr1, tr2);
10767 else if (!context_msgStrictOps ())
10769 if (ctype_isPointer (tr1))
10771 if (ctype_isPointer (tr2) && !exprNode_isNullValue (e2))
10775 else if (ctype_isInt (tr2))
10781 ret = ctype_unknown;
10784 else if (ctype_isPointer (tr2))
10786 if (ctype_isPointer (tr1))
10790 else if (ctype_isInt (tr1))
10796 ret = ctype_unknown;
10801 ret = ctype_resolveNumerics (tr1, tr2);
10806 int opid = lltok_getTok (op);
10807 bool comparop = (opid == EQ_OP || opid == NE_OP
10808 || opid == TLT || opid == TGT
10809 || opid == LE_OP || opid == GE_OP);
10811 if (!ctype_isNumeric (tr1) && !ctype_isNumeric (tr2))
10814 && ((ctype_isEnum (tr1) && ctype_isEnum (tr2))
10815 || (ctype_isBool (tr1) && ctype_isBool (tr2))
10816 || (ctype_isChar (tr1) && ctype_isChar (tr2))))
10822 if (ctype_sameName (te1, te2))
10826 message ("Operands of %s are non-numeric (%t): %s %s %s",
10827 lltok_unparse (op), te1,
10828 exprNode_unparse (e1), lltok_unparse (op),
10829 exprNode_unparse (e2)),
10836 message ("Operands of %s are non-numerics (%t, %t): %s %s %s",
10837 lltok_unparse (op), te1, te2,
10838 exprNode_unparse (e1), lltok_unparse (op),
10839 exprNode_unparse (e2)),
10844 else if (!ctype_isNumeric (tr1))
10848 message ("Right operand of %s is non-numeric (%t): %s %s %s",
10849 lltok_unparse (op), te1,
10850 exprNode_unparse (e1), lltok_unparse (op),
10851 exprNode_unparse (e2)),
10856 if (!ctype_isNumeric (tr2))
10860 message ("Left operand of %s is non-numeric (%t): %s %s %s",
10861 lltok_unparse (op), te2,
10862 exprNode_unparse (e1), lltok_unparse (op),
10863 exprNode_unparse (e2)),
10868 ret = ctype_unknown;
10876 abstractOpError (ctype tr1, ctype tr2, lltok op,
10877 /*@notnull@*/ exprNode e1, /*@notnull@*/ exprNode e2,
10878 fileloc loc1, fileloc loc2)
10880 if (ctype_isRealAbstract (tr1) && ctype_isRealAbstract (tr2))
10882 if (ctype_match (tr1, tr2))
10884 if (ctype_isRealNumAbstract (tr1))
10886 ; /* No warning for numabstract types */
10890 if (lltok_isEqOp (op) || lltok_isNotEqOp (op))
10893 (FLG_ABSTRACTCOMPARE,
10894 message ("Object equality comparison (%s) on objects of abstract type (%t): %s %s %s",
10895 lltok_unparse (op), tr1,
10896 exprNode_unparse (e1), lltok_unparse (op), exprNode_unparse (e2)),
10903 message ("Operands of %s are abstract type (%t): %s %s %s",
10904 lltok_unparse (op), tr1,
10905 exprNode_unparse (e1), lltok_unparse (op), exprNode_unparse (e2)),
10912 if (ctype_isRealNumAbstract (tr1) && ctype_isRealNumAbstract (tr2))
10917 ("Operands of %s are different numabstract types (%t, %t): %s %s %s",
10918 lltok_unparse (op), tr1, tr2,
10919 exprNode_unparse (e1),
10920 lltok_unparse (op), exprNode_unparse (e2)),
10927 message ("Operands of %s are abstract types (%t, %t): %s %s %s",
10928 lltok_unparse (op), tr1, tr2,
10929 exprNode_unparse (e1), lltok_unparse (op),
10930 exprNode_unparse (e2)),
10935 else if (ctype_isRealAbstract (tr1) && !ctype_isRealNumAbstract (tr1))
10939 message ("Left operand of %s is abstract type (%t): %s %s %s",
10940 lltok_unparse (op), tr1,
10941 exprNode_unparse (e1), lltok_unparse (op), exprNode_unparse (e2)),
10946 if (ctype_isRealAbstract (tr2) && !ctype_isRealNumAbstract (tr2))
10950 message ("Right operand of %s is abstract type (%t): %s %s %s",
10951 lltok_unparse (op), tr2,
10952 exprNode_unparse (e1), lltok_unparse (op), exprNode_unparse (e2)),
10963 ** requies e1 and e2 and not error exprNode's.
10967 ** If e1 is a component of an abstract type, and e2 is mutable and client-visible,
10968 ** the rep of the abstract type is exposed.
10970 ** The order is very important:
10972 ** check rep expose (move into check transfer)
10978 ** This isn't really a sensible procedure, but the indententation
10979 ** was getting too deep.
10983 checkOneRepExpose (sRef ysr, sRef base,
10984 /*@notnull@*/ exprNode e1,
10985 /*@notnull@*/ exprNode e2, ctype ct,
10988 if (!(sRef_isOnly (ysr) || sRef_isKeep (ysr)
10989 || sRef_isOwned (ysr)
10990 || sRef_isExposed (ysr)))
10992 if (sRef_isAnyParam (base) && !sRef_isExposed (base)
10993 && !sRef_isObserver (base)) /* evans 2001-07-11: added isObserver */
10996 if (sRef_isIReference (ysr))
10998 if (sRef_sameName (base, sRef_getRootBase (e2->sref)))
11003 ("Assignment of mutable component of parameter %q "
11004 "to component of abstract "
11005 "type %s exposes rep: %s = %s",
11006 sRef_unparse (base),
11007 ctype_unparse (ct),
11008 exprNode_unparse (e1), exprNode_unparse (e2)),
11016 ("Assignment of mutable component of parameter %q "
11017 "(through alias %q) to component of abstract "
11018 "type %s exposes rep: %s = %s",
11019 sRef_unparse (base),
11020 sRef_unparse (e2->sref),
11021 ctype_unparse (ct),
11022 exprNode_unparse (e1), exprNode_unparse (e2)),
11028 if (sRef_sameName (base, sRef_getRootBase (e2->sref)))
11032 message ("Assignment of mutable parameter %q "
11033 "to component of abstract type %s "
11034 "exposes rep: %s = %s",
11035 sRef_unparse (base),
11036 ctype_unparse (ct),
11037 exprNode_unparse (e1),
11038 exprNode_unparse (e2)),
11045 message ("Assignment of mutable parameter %q "
11046 "(through alias %q) to "
11047 "component of abstract type %s exposes "
11049 sRef_unparse (base),
11050 sRef_unparse (e2->sref),
11051 ctype_unparse (ct),
11052 exprNode_unparse (e1),
11053 exprNode_unparse (e2)),
11059 if (sRef_isFileOrGlobalScope (s2b))
11061 if (sRef_sameName (base, sRef_getRootBase (e2->sref)))
11065 message ("Assignment of global %q "
11067 "abstract type %s exposes rep: %s = %s",
11068 sRef_unparse (base),
11069 ctype_unparse (ct),
11070 exprNode_unparse (e1), exprNode_unparse (e2)),
11077 message ("Assignment of global %q (through alias %q) "
11079 "abstract type %s exposes rep: %s = %s",
11080 sRef_unparse (base),
11081 sRef_unparse (e2->sref),
11082 ctype_unparse (ct),
11083 exprNode_unparse (e1), exprNode_unparse (e2)),
11091 doAssign (/*@notnull@*/ exprNode e1, /*@notnull@*/ exprNode e2, bool isInit)
11093 DPRINTF (("Do assign: %s <- %s",
11094 exprNode_unparse (e1), exprNode_unparse (e2)));
11095 DPRINTF (("Ctype: %s", ctype_unparse (exprNode_getType (e1))));
11097 if (ctype_isRealFunction (exprNode_getType (e1))
11098 && !ctype_isRealPointer (exprNode_getType (e1)))
11102 message ("Invalid left-hand side of assignment (function type %s): %s",
11103 ctype_unparse (exprNode_getType (e1)),
11104 exprNode_unparse (e1)),
11108 if (context_getFlag (FLG_ASSIGNEXPOSE) && ctype_isMutable (e2->typ))
11110 ctype t2 = exprNode_getType (e2);
11111 sRef sr = sRef_getRootBase (e1->sref);
11112 ctype ct = sRef_getType (sr);
11114 if (ctype_isAbstract (t2)
11115 && !(uentry_isMutableDatatype (usymtab_getTypeEntry (ctype_typeId (t2)))))
11117 /* it is immutable, okay to reference */
11118 goto donerepexpose;
11121 if (ctype_isAbstract (ct) && sRef_isIReference (e1->sref))
11123 sRef s2b = sRef_getRootBase (e2->sref);
11124 sRef s1 = e1->sref;
11125 sRef s1b = sRef_getRootBase (s1);
11128 aliases = usymtab_canAlias (e2->sref);
11130 if (!sRef_similar (s2b, s1b)
11131 && !sRef_isExposed (s1)
11132 && !(sRef_isOnly (s2b) || sRef_isKeep (s2b) || sRef_isExposed (s2b)))
11134 if (sRef_isAnyParam (s2b) && !sRef_isOnly (s2b)
11135 && !sRef_isOwned (s2b) && !sRef_isKeep (s2b)
11136 && !sRef_isExposed (s2b))
11138 if (sRef_isIReference (e2->sref))
11143 ("Assignment of mutable component of parameter %q "
11144 "to component of abstract type %s exposes rep: %s = %s",
11145 sRef_unparse (s2b),
11146 ctype_unparse (ct),
11147 exprNode_unparse (e1), exprNode_unparse (e2)),
11154 message ("Assignment of mutable parameter %q to "
11155 "component of abstract type %s exposes rep: %s = %s",
11156 sRef_unparse (s2b),
11157 ctype_unparse (ct),
11158 exprNode_unparse (e1), exprNode_unparse (e2)),
11163 if (sRef_isFileOrGlobalScope (s2b))
11167 message ("Assignment of global %q to component of "
11168 "abstract type %s exposes rep: %s = %s",
11169 sRef_unparse (s2b),
11170 ctype_unparse (ct),
11171 exprNode_unparse (e1), exprNode_unparse (e2)),
11175 sRefSet_realElements (aliases, ysr)
11177 sRef base = sRef_getRootBase (ysr);
11179 if (sRef_similar (ysr, s2b) || sRef_similar (s1b, base)
11180 || sRef_sameName (base, s1b))
11182 ; /* error already reported or same sref */
11186 checkOneRepExpose (ysr, base, e1, e2, ct, s2b);
11188 } end_sRefSet_realElements;
11190 sRefSet_free (aliases);
11197 ** function variables don't really work...
11200 if (!ctype_isFunction (ctype_realType (e2->typ)))
11204 DPRINTF (("Check init: %s / %s",
11205 exprNode_unparse (e1), exprNode_unparse (e2)));
11206 transferChecks_initialization (e1, e2);
11210 transferChecks_assign (e1, e2);
11215 sRef fref = e2->sref;
11217 sRef_setDefState (e1->sref, sRef_getDefState (fref), e1->loc);
11218 sRef_setNullState (e1->sref, sRef_getNullState (fref), e1->loc);
11220 /* Need to typecheck the annotation on the parameters */
11222 if (ctype_isRealFunction (e1->typ)) {
11223 uentryList e1p = ctype_argsFunction (ctype_realType (e1->typ));
11224 uentryList e2p = ctype_argsFunction (ctype_realType (e2->typ));
11226 if (!uentryList_isMissingParams (e1p)
11227 && !uentryList_isMissingParams (e2p)
11228 && uentryList_size (e1p) > 0) {
11229 if (uentryList_size (e1p) == uentryList_size (e2p)) {
11232 uentryList_elements (e1p, el1) {
11235 el2 = uentryList_getN (e2p, n);
11237 uentry_checkMatchParam (el1, el2, n, e2);
11238 } end_uentryList_elements;
11244 if (exprNode_isStringLiteral (e2))
11246 exprNode_checkStringLiteralLength (exprNode_getType (e1), e2);
11249 if (isInit && sRef_isFileOrGlobalScope (e1->sref))
11255 DPRINTF (("Update aliases: %s / %s", exprNode_unparse (e1), exprNode_unparse (e2)));
11256 updateAliases (e1, e2);
11261 checkMacroParen (exprNode e)
11263 if (exprNode_isError (e) || e->kind == XPR_CAST)
11269 if (sRef_isUnsafe (e->sref) && !exprNode_isInParens (e))
11273 message ("Macro parameter used without parentheses: %s",
11274 exprNode_unparse (e)),
11281 reflectNullTest (/*@notnull@*/ exprNode e, bool isnull)
11285 e->guards = guardSet_addTrueGuard (e->guards, e->sref);
11289 e->guards = guardSet_addFalseGuard (e->guards, e->sref);
11296 ** if e2 is a parameter or global derived location which
11297 ** can be modified (that is, e2 is a mutable abstract type,
11298 ** or a derived pointer), then e1 can alias e2.
11300 ** e1 can alias everything which e2 can alias.
11302 ** Also, if e1 is guarded, remove from guard sets!
11305 static void updateAliases (/*@notnull@*/ exprNode e1, /*@notnull@*/ exprNode e2)
11307 if (!context_inProtectVars ())
11310 ** depends on types of e1 and e2
11313 sRef s1 = e1->sref;
11314 sRef s2 = e2->sref;
11315 ctype t1 = exprNode_getType (e1);
11317 /* handle pointer sRefs, record fields, arrays, etc... */
11319 if (!ctype_isRealSU (t1))
11321 DPRINTF (("Copying real! %s", ctype_unparse (t1)));
11322 sRef_copyRealDerivedComplete (s1, s2);
11327 ** Fields should alias
11330 DPRINTF (("Not COPYING!: %s", ctype_unparse (t1)));
11333 if (ctype_isMutable (t1) && sRef_isKnown (s1))
11335 usymtab_clearAlias (s1);
11336 usymtab_addMustAlias (s1, s2);
11337 DPRINTF (("Add must alias: %s / %s", sRef_unparse (s1), sRef_unparse (s2)));
11341 DPRINTF (("Not mutable: %s", ctype_unparse (t1)));
11344 if (sRef_possiblyNull (s1) && usymtab_isGuarded (s1))
11346 usymtab_unguard (s1);
11351 exprNode exprNode_updateLocation (/*@returned@*/ exprNode e, /*@temp@*/ fileloc loc)
11353 if (exprNode_isDefined (e))
11355 e->loc = fileloc_update (e->loc, loc);
11359 e = exprNode_createLoc (ctype_unknown, fileloc_copy (loc));
11365 static void checkUniqueParams (exprNode fcn,
11366 /*@notnull@*/ exprNode current,
11368 int paramno, uentry ucurrent)
11371 sRef thisref = exprNode_getSref (current);
11374 ** Check if any argument could match this argument.
11377 exprNodeList_elements (args, icurrent)
11381 if (iparamno != paramno)
11383 sRef sr = exprNode_getSref (icurrent);
11385 if (sRef_similarRelaxed (thisref, sr))
11387 if (!sRef_isConst (thisref) && !sRef_isConst (sr))
11392 ("Parameter %d (%s) to function %s is declared %s but "
11393 "is aliased by parameter %d (%s)",
11395 exprNode_unparse (current),
11396 exprNode_unparse (fcn),
11397 alkind_unparse (uentry_getAliasKind (ucurrent)),
11398 iparamno, exprNode_unparse (icurrent)),
11404 sRefSet aliases = usymtab_canAlias (sr);
11406 sRefSet_allElements (aliases, asr)
11408 if (ctype_isUnknown (sRef_getType (thisref)))
11410 sRef_setType (thisref, uentry_getType (ucurrent));
11413 if (sRef_similarRelaxed (thisref, asr))
11415 if (sRef_isExternal (asr))
11417 if (sRef_isLocalState (thisref))
11423 sRef base = sRef_getRootBase (asr);
11425 if (!sRef_similar (sRef_getBase (asr), thisref))
11427 if (sRef_isUnique (base) || sRef_isOnly (base)
11428 || sRef_isKept (base)
11429 || (sRef_isAddress (asr) && sRef_isLocalVar (base))
11430 || (sRef_isAddress (thisref)
11431 && sRef_isLocalVar (sRef_getRootBase (thisref))))
11433 ; /* okay, no error */
11438 (FLG_MAYALIASUNIQUE,
11440 ("Parameter %d (%s) to function %s is declared %s but "
11441 "may be aliased externally by parameter %d (%s)",
11443 exprNode_unparse (current),
11444 exprNode_unparse (fcn),
11445 alkind_unparse (uentry_getAliasKind (ucurrent)),
11446 iparamno, exprNode_unparse (icurrent)),
11457 ("Parameter %d (%s) to function %s is declared %s but "
11458 "is aliased externally by parameter %d (%s) through "
11461 exprNode_unparse (current),
11462 exprNode_unparse (fcn),
11463 alkind_unparse (uentry_getAliasKind (ucurrent)),
11464 iparamno, exprNode_unparse (icurrent),
11465 sRef_unparse (asr)),
11469 } end_sRefSet_allElements;
11470 sRefSet_free (aliases);
11473 } end_exprNodeList_elements;
11476 long exprNode_getLongValue (exprNode e) {
11479 if (exprNode_hasValue (e)
11480 && multiVal_isInt (exprNode_getValue (e)))
11482 value = multiVal_forceInt (exprNode_getValue (e));
11493 /*@observer@*/ fileloc exprNode_getfileloc (exprNode p_e)
11495 if (exprNode_isDefined (p_e) )
11496 return ( p_e->loc );
11498 return fileloc_undefined;
11501 /*@only@*/ fileloc exprNode_getNextSequencePoint (exprNode e)
11504 ** Returns the location of the sequence point following e.
11506 ** Only works for statements (for now).
11509 if (exprNode_isDefined (e) && e->kind == XPR_STMT) {
11510 lltok t = exprData_getUopTok (e->edata);
11511 return fileloc_copy(lltok_getLoc (t));
11513 /* drl possible problem : warning fix
11514 llcontbug (message ("Cannot get next sequence point: %s", exprNode_unparse (e)));
11516 return fileloc_undefined;
11520 exprNode exprNode_createNew(ctype c)
11524 ret = exprNode_createPlain (c);
11529 bool exprNode_isInitBlock (exprNode e)
11531 return (exprNode_isDefined(e) && e->kind == XPR_INITBLOCK);
11534 /*drl 3/2/2003 moved this function out of constraint.c */
11535 exprNode exprNode_copyConstraints (/*@returned@*/ exprNode dst, exprNode src)
11538 llassert (exprNode_isDefined (dst) );
11539 llassert (exprNode_isDefined (src) );
11541 constraintList_free (dst->ensuresConstraints);
11542 constraintList_free (dst->requiresConstraints);
11543 constraintList_free (dst->trueEnsuresConstraints);
11544 constraintList_free (dst->falseEnsuresConstraints);
11546 dst->ensuresConstraints = constraintList_copy (src->ensuresConstraints);
11547 dst->requiresConstraints = constraintList_copy (src->requiresConstraints);
11548 dst->trueEnsuresConstraints = constraintList_copy (src->trueEnsuresConstraints);
11549 dst->falseEnsuresConstraints = constraintList_copy (src->falseEnsuresConstraints);