2 ** LCLint - annotation-assisted static program checker
3 ** Copyright (C) 1994-2001 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 lclint: lclint-request@cs.virginia.edu
21 ** To report a bug: lclint-bug@cs.virginia.edu
22 ** For more information: http://lclint.cs.virginia.edu
28 ** storeRef's are kept in allRefs for each function scope, and all are
29 ** free'd at the end of the function. This relies on the constraint that
30 ** no storeRef created while checking a function is used outside that
33 ** storeRefs in the file and global scopes are free'd by the uentry.
37 # include "lclintMacros.nf"
39 # include "exprChecks.h"
40 # include "transferChecks.h"
41 # include "sRefTable.h"
42 # include "structNames.h"
45 ** Predicate functions that evaluate both arguments in order.
49 # define OR(a,b) (a ? (b, TRUE) : b)
52 # define AND(a,b) (a ? b : (b, FALSE))
54 static void sRef_checkValidAux (sRef p_s, sRefSet p_checkedsofar) /*@modifies p_checkedsofar@*/ ;
56 static bool sRef_isDerived (sRef p_s) /*@*/ ;
58 static /*@exposed@*/ sRef sRef_fixDirectBase (sRef p_s, sRef p_base)
59 /*@modifies p_base@*/ ;
61 static void sRef_updateNullState (sRef p_res, sRef p_other) /*@modifies p_res@*/ ;
63 static bool sRef_isAllocatedStorage (sRef p_s) /*@*/ ;
64 static void sRef_setNullErrorLoc (sRef p_s, fileloc) /*@*/ ;
67 sRef_aliasSetComplete (void (p_predf) (sRef, fileloc), sRef p_s, fileloc p_loc)
70 static int sRef_depth (sRef p_s) /*@*/ ;
73 sRef_innerAliasSetComplete (void (p_predf) (sRef, fileloc), sRef p_s,
78 sRef_innerAliasSetCompleteParam (void (p_predf) (sRef, sRef), sRef p_s, sRef p_t)
82 sRef_aliasSetCompleteParam (void (p_predf) (sRef, alkind, fileloc), sRef p_s,
83 alkind p_kind, fileloc p_loc)
86 static speckind speckind_fromInt (int p_i);
87 static bool sRef_equivalent (sRef p_s1, sRef p_s2);
88 static bool sRef_isDeepUnionField (sRef p_s);
89 static void sRef_addDeriv (/*@notnull@*/ sRef p_s, /*@notnull@*/ /*@exposed@*/ sRef p_t);
90 static bool sRef_checkModify (sRef p_s, sRefSet p_sl) /*@*/ ;
92 static void sRef_checkMutable (/*@unused@*/ sRef s)
95 if (sRef_isValid (s) && s->immut)
97 llcontbug (message ("Modification to sRef marked immutable: %q",
98 sRef_unparseFull (s)));
102 static bool skind_isSimple (skind sk)
106 case SK_PARAM: case SK_CVAR: case SK_CONST:
107 case SK_OBJECT: case SK_UNKNOWN: case SK_NEW:
114 static void sinfo_free (/*@special@*/ /*@temp@*/ /*@notnull@*/ sRef p_s)
115 /*@uses p_s->kind, p_s->info@*/
116 /*@releases p_s->info@*/ ;
118 static /*@null@*/ sinfo sinfo_copy (/*@notnull@*/ sRef p_s) /*@*/ ;
119 static void sRef_setPartsFromUentry (sRef p_s, uentry p_ue)
121 static bool checkDeadState (/*@notnull@*/ sRef p_el, bool p_tbranch, fileloc p_loc);
122 static /*@dependent@*/ sRef sRef_constructPointerAux (/*@notnull@*/ /*@exposed@*/ sRef p_t) /*@*/ ;
125 sRef_combineExKinds (/*@notnull@*/ sRef p_res, /*@notnull@*/ sRef p_other)
126 /*@modifies p_res@*/ ;
129 sRef_combineAliasKinds (/*@notnull@*/ sRef p_res, /*@notnull@*/ sRef p_other,
130 clause p_cl, fileloc p_loc)
131 /*@modifies p_res@*/ ;
134 sRef_combineNullState (/*@notnull@*/ sRef p_res, /*@notnull@*/ sRef p_other)
135 /*@modifies p_res@*/ ;
138 sRef_combineDefState (/*@notnull@*/ sRef p_res, /*@notnull@*/ sRef p_other)
139 /*@modifies p_res@*/ ;
141 static void sRef_setStateFromAbstractUentry (sRef p_s, uentry p_ue)
145 sinfo_update (/*@notnull@*/ /*@exposed@*/ sRef p_res,
146 /*@notnull@*/ /*@exposed@*/ sRef p_other);
147 static void sRef_setDefinedAux (sRef p_s, fileloc p_loc, bool p_clear)
149 static void sRef_setDefinedNoClear (sRef p_s, fileloc p_loc)
151 static void sRef_setStateAux (sRef p_s, sstate p_ss, fileloc p_loc)
154 static /*@exposed@*/ sRef
155 sRef_buildNCField (/*@exposed@*/ sRef p_rec, /*@exposed@*/ cstring p_f);
158 sRef_mergeStateAux (/*@notnull@*/ sRef p_res, /*@notnull@*/ sRef p_other,
159 clause p_cl, bool p_opt, fileloc p_loc,
161 /*@modifies p_res, p_other@*/ ;
163 static /*@null@*/ sinfo sinfo_fullCopy (/*@notnull@*/ sRef p_s);
164 static bool sRef_doModify (sRef p_s, sRefSet p_sl) /*@modifies p_s@*/ ;
165 static bool sRef_doModifyVal (sRef p_s, sRefSet p_sl) /*@modifies p_s@*/;
166 static bool sRef_checkModifyVal (sRef p_s, sRefSet p_sl) /*@*/ ;
168 static /*@only@*/ sRefSet
169 sRef_mergeDerivs (/*@only@*/ sRefSet p_res, sRefSet p_other,
170 bool p_opt, clause p_cl, fileloc p_loc);
172 static /*@only@*/ sRefSet
173 sRef_mergeUnionDerivs (/*@only@*/ sRefSet p_res,
174 /*@exposed@*/ sRefSet p_other,
175 bool p_opt, clause p_cl, fileloc p_loc);
177 static /*@only@*/ sRefSet
178 sRef_mergePdefinedDerivs (/*@only@*/ sRefSet p_res, sRefSet p_other, bool p_opt,
179 clause p_cl, fileloc p_loc);
181 static /*@only@*/ cstring sRef_unparseWithArgs (sRef p_s, uentryList p_args);
182 static /*@only@*/ cstring sRef_unparseNoArgs (sRef p_s);
184 static /*@exposed@*/ sRef sRef_findDerivedPointer (sRef p_s);
185 static /*@exposed@*/ sRef sRef_findDerivedArrayFetch (/*@notnull@*/ sRef, bool, int, bool) ;
186 static /*@exposed@*/ sRef sRef_findDerivedField (/*@notnull@*/ sRef p_rec, cstring p_f);
187 static /*@exposed@*/ sRef
188 sRef_getDeriv (/*@notnull@*/ /*@returned@*/ sRef p_set, sRef p_guide);
190 static bool inFunction = FALSE;
191 static /*@only@*/ sRefTable allRefs;
193 /* # define DEBUGREFS */
197 static totnsrefs = 0;
198 static maxnsrefs = 0;
199 static ntotrefers = 0;
203 static /*@checked@*/ bool protectDerivs = FALSE;
206 ** Result of sRef_alloc is dependent since allRefs may
207 ** reference it. It is only if !inFunction.
210 static /*@dependent@*/ /*@out@*/ /*@notnull@*/ sRef
213 sRef s = (sRef) dmalloc (sizeof (*s));
217 DPRINTF (("Alloc sref: [%p]", s));
221 allRefs = sRefTable_add (allRefs, s);
226 DPRINTF (("Not in function!"));
232 if (nsrefs >= maxnsrefs)
241 /*@-mustfree@*/ /*@-freshtrans@*/
243 /*@=mustfree@*/ /*@=freshtrans@*/
246 static void sRef_checkValidAux (sRef s, sRefSet checkedsofar)
250 if (!sRef_isValid (s)) return;
252 if (sRefSet_containsSameObject (checkedsofar, s))
258 checkedsofar = sRefSet_insert (checkedsofar, s);
259 /*@=temptrans@*/ /* checksofar will be destroyed before checkValid returns */
263 case SK_UNCONSTRAINED:
264 llassert (cstring_length (s->info->fname) < 100);
268 llassert (s->info->cvar->lexlevel >= 0);
269 /* llassert (s->info->cvar->lexlevel <= usymtab_getCurrentDepth ()); */
273 llassert (s->info->paramno >= -1);
274 llassert (s->info->paramno <= 50); /*@i32 bogus...*/
278 sRef_checkValidAux (s->info->arrayfetch->arr, checkedsofar);
282 sRef_checkValidAux (s->info->field->rec, checkedsofar);
283 llassert (cstring_length (s->info->field->field) < 100);
287 sRef_checkValidAux (s->info->ref, checkedsofar);
291 sRef_checkValidAux (s->info->ref, checkedsofar);
295 /* check ctype s->info->object */
299 sRef_checkValidAux (s->info->conj->a, checkedsofar);
300 sRef_checkValidAux (s->info->conj->b, checkedsofar);
304 llassert (cstring_length (s->info->fname) < 100);
308 sRef_checkValidAux (s->info->ref, checkedsofar);
312 sRef_checkValidAux (s->info->ref, checkedsofar);
318 /* check ctyp s->type */
322 llassert (s->info->spec == SR_NOTHING
323 || s->info->spec == SR_INTERNAL
324 || s->info->spec == SR_SPECSTATE
325 || s->info->spec == SR_SYSTEM);
335 sRefSet_elements (s->deriv, el)
337 sRef_checkValidAux (el, checkedsofar);
338 } end_sRefSet_elements ;
341 void sRef_checkValid (/*@unused@*/ sRef s)
345 sRefSet checkedsofar = sRefSet_new ();
346 sRef_checkValidAux (s, checkedsofar);
350 static /*@dependent@*/ /*@notnull@*/ /*@special@*/ sRef
353 /*@ensures isnull result->aliasinfo, result->definfo,
354 result->expinfo, result->info, result->deriv, result->state@*/
356 sRef s = sRef_alloc ();
358 s->kind = SK_UNKNOWN;
362 s->val = multiVal_undefined;
364 s->type = ctype_unknown;
365 s->defstate = SS_UNKNOWN;
367 /* start modifications */
368 s->bufinfo.bufstate = BB_NOTNULLTERMINATED;
369 /* end modifications */
371 s->aliaskind = AK_UNKNOWN;
372 s->oaliaskind = AK_UNKNOWN;
374 s->nullstate = NS_UNKNOWN;
376 s->expkind = XO_UNKNOWN;
377 s->oexpkind = XO_UNKNOWN;
379 s->aliasinfo = stateInfo_undefined;
380 s->definfo = stateInfo_undefined;
381 s->nullinfo = stateInfo_undefined;
382 s->expinfo = stateInfo_undefined;
385 s->deriv = sRefSet_undefined;
387 s->state = valueTable_undefined;
392 static /*@dependent@*/ /*@notnull@*/ /*@special@*/ sRef
395 /*@ensures isnull result->aliasinfo, result->definfo,
396 result->expinfo, result->info, result->deriv@*/
398 sRef res = sRef_new ();
400 res->state = valueTable_undefined;
405 void sRef_protectDerivs (void) /*@modifies protectDerivs@*/
407 llassert (!protectDerivs);
408 protectDerivs = TRUE;
411 void sRef_clearProtectDerivs (void) /*@modifies protectDerivs@*/
413 llassert (protectDerivs);
414 protectDerivs = FALSE;
418 ** hmmm...here be kind of a hack. This function mysteriously appeared
419 ** in my code, but I'm sure I didn't write it.
423 sRef_isRecursiveField (sRef s)
425 if (sRef_isField (s))
427 if (sRef_depth (s) > 13)
432 fieldname = sRef_getField (s);
433 base = sRef_getBase (s);
435 while (sRef_isValid (base))
437 if (sRef_isField (base))
439 if (cstring_equal (fieldname, sRef_getField (base)))
445 base = sRef_getBaseSafe (base);
454 sRef_addDeriv (/*@notnull@*/ sRef s, /*@notnull@*/ /*@exposed@*/ sRef t)
456 if (!context_inProtectVars ()
460 && !sRef_isConst (s))
462 int sd = sRef_depth (s);
463 int td = sRef_depth (t);
470 /* This sometimes fails: (evans 2001-07-12)
471 if (sRef_isArrayFetch (t))
473 DPRINTF (("Derived fetch: %s / %s / %s",
474 sRef_unparseFull (s), sRef_unparseFull (t),
475 sRef_unparseFull (t->info->arrayfetch->arr)));
476 llassert (t->info->arrayfetch->arr == s);
480 if (sRef_isFileOrGlobalScope (s))
482 if (context_inFunctionLike ()
483 && ctype_isKnown (sRef_getType (s))
484 && !ctype_isFunction (sRef_getType (s)))
486 globSet g = context_getUsedGlobs ();
488 if (!globSet_member (g, s))
491 ** don't report as a bug
495 (message ("sRef_addDeriv: global variable not in used "
496 "globs: %q / %s / %q",
498 ctype_unparse (sRef_getType (s)),
499 sRefSet_unparse (s->deriv)));
504 s->deriv = sRefSet_insert (s->deriv, t);
510 DPRINTF (("Add deriv: [%p] %s / [%p] %s",
512 t, sRef_unparse (t)));
514 s->deriv = sRefSet_insert (s->deriv, t);
520 sRef_deepPred (bool (predf) (sRef), sRef s)
522 if (sRef_isValid (s))
524 if ((*predf)(s)) return TRUE;
529 return (sRef_deepPred (predf, s->info->ref));
531 return (sRef_deepPred (predf, s->info->arrayfetch->arr));
533 return (sRef_deepPred (predf, s->info->field->rec));
535 return (sRef_deepPred (predf, s->info->conj->a)
536 || sRef_deepPred (predf, s->info->conj->b));
545 bool sRef_modInFunction (void)
550 void sRef_setStateFromType (sRef s, ctype ct)
552 if (sRef_isValid (s))
554 if (ctype_isUser (ct))
556 DPRINTF (("Here we are: %s", sRef_unparseFull (s)));
557 sRef_setStateFromUentry
558 (s, usymtab_getTypeEntry (ctype_typeId (ct)));
560 else if (ctype_isAbstract (ct))
562 DPRINTF (("Here we are: %s", sRef_unparseFull (s)));
563 sRef_setStateFromAbstractUentry
564 (s, usymtab_getTypeEntry (ctype_typeId (ct)));
568 ; /* not a user type */
573 static void sRef_setTypeState (sRef s)
575 if (sRef_isValid (s))
577 sRef_setStateFromType (s, s->type);
582 sRef_hasAliasInfoLoc (sRef s)
584 return (sRef_isValid (s) && (s->aliasinfo != NULL)
585 && (fileloc_isDefined (s->aliasinfo->loc)));
588 static /*@falsenull@*/ bool
589 sRef_hasStateInfoLoc (sRef s)
591 return (sRef_isValid (s) && (s->definfo != NULL)
592 && (fileloc_isDefined (s->definfo->loc)));
595 static /*@falsenull@*/ bool
596 sRef_hasExpInfoLoc (sRef s)
598 return (sRef_isValid (s)
599 && (s->expinfo != NULL) && (fileloc_isDefined (s->expinfo->loc)));
602 static /*@observer@*/ /*@unused@*/ stateInfo sRef_getInfo (sRef s, cstring key)
606 if (!sRef_isValid (s)) {
607 return stateInfo_undefined;
610 sv = valueTable_lookup (s->state, key);
612 if (stateValue_isDefined (sv))
614 return stateValue_getInfo (sv);
617 return stateInfo_undefined;
622 sRef_hasNullInfoLoc (sRef s)
624 return (sRef_isValid (s) && s->nullinfo != NULL
625 && (fileloc_isDefined (s->nullinfo->loc)));
629 sRef_hasAliasInfoRef (sRef s)
631 return (sRef_isValid (s) && (s->aliasinfo != NULL)
632 && (sRef_isValid (s->aliasinfo->ref)));
635 static /*@observer@*/ fileloc
636 sRef_getAliasInfoLoc (/*@exposed@*/ sRef s)
638 llassert (sRef_isValid (s) && s->aliasinfo != NULL
639 && (fileloc_isDefined (s->aliasinfo->loc)));
640 return (s->aliasinfo->loc);
643 static /*@observer@*/ fileloc
644 sRef_getStateInfoLoc (/*@exposed@*/ sRef s)
646 llassert (sRef_isValid (s) && s->definfo != NULL
647 && (fileloc_isDefined (s->definfo->loc)));
648 return (s->definfo->loc);
651 static /*@observer@*/ fileloc
652 sRef_getExpInfoLoc (/*@exposed@*/ sRef s)
654 llassert (sRef_isValid (s) && s->expinfo != NULL
655 && (fileloc_isDefined (s->expinfo->loc)));
656 return (s->expinfo->loc);
659 static /*@observer@*/ fileloc
660 sRef_getNullInfoLoc (/*@exposed@*/ sRef s)
662 llassert (sRef_isValid (s) && s->nullinfo != NULL
663 && (fileloc_isDefined (s->nullinfo->loc)));
664 return (s->nullinfo->loc);
668 sRef_getAliasInfoRef (/*@temp@*/ sRef s)
670 llassert (sRef_isValid (s) && s->aliasinfo != NULL);
671 return (s->aliasinfo->ref);
674 bool sRef_inGlobalScope ()
680 ** This function should be called before new sRefs are created
681 ** somewhere where they will have a lifetime greater than the
682 ** current function scope.
685 void sRef_setGlobalScope ()
687 llassert (inFunction);
688 DPRINTF (("leave function"));
692 void sRef_clearGlobalScope ()
694 llassert (!inFunction);
695 DPRINTF (("enter function"));
699 static bool oldInFunction = FALSE;
700 static int nestedScope = 0;
702 void sRef_setGlobalScopeSafe ()
704 if (nestedScope == 0)
706 oldInFunction = inFunction;
710 DPRINTF (("leave function safe"));
714 void sRef_clearGlobalScopeSafe ()
717 llassert (nestedScope >= 0);
719 if (nestedScope == 0)
721 inFunction = oldInFunction;
724 DPRINTF (("clear function: %s", bool_unparse (inFunction)));
727 void sRef_enterFunctionScope ()
729 llassert (!inFunction);
730 llassert (sRefTable_isEmpty (allRefs));
732 DPRINTF (("enter function"));
735 void sRef_exitFunctionScope ()
739 DPRINTF (("Exit function scope."));
740 sRefTable_clear (allRefs);
745 llbuglit ("sRef_exitFunctionScope: not in function");
749 void sRef_destroyMod () /*@globals killed allRefs;@*/
752 llmsg (message ("Live: %d / %d ", nsrefs, totnsrefs));
755 sRefTable_free (allRefs);
759 static /*@notnull@*/ /*@exposed@*/ sRef
760 sRef_fixConj (/*@notnull@*/ sRef s)
765 s = sRef_getConjA (s);
766 } while (sRef_isConj (s));
768 llassert (sRef_isValid (s));
769 return s; /* don't need to ref */
778 sRef_isExternallyVisibleAux (sRef s)
781 sRef base = sRef_getRootBase (s);
783 if (sRef_isValid (base))
785 res = sRef_isParam (base) || sRef_isFileOrGlobalScope (base) || sRef_isExternal (base);
792 sRef_isExternallyVisible (sRef s)
794 return (sRef_aliasCheckSimplePred (sRef_isExternallyVisibleAux, s));
798 sRef_getBaseUentry (sRef s)
800 sRef base = sRef_getRootBase (s);
801 uentry res = uentry_undefined;
803 if (sRef_isValid (base))
808 res = usymtab_getRefQuiet (paramsScope, base->info->paramno);
812 res = usymtab_getRefQuiet (base->info->cvar->lexlevel,
813 base->info->cvar->index);
825 ** lookup the current uentry corresponding to s, and return the corresponding sRef.
826 ** yuk yuk yuk yuk yuk yuk yuk yuk
830 sRef_updateSref (sRef s)
836 if (!sRef_isValid (s)) return sRef_undefined;
845 case SK_UNCONSTRAINED:
852 sRef r = sRef_updateSref (s->info->ref);
854 if (r != s->info->ref)
856 return sRef_makeExternal (r);
866 uentry ue = sRef_getUentry (s);
868 /* must be raw name! (need the marker) */
869 ue = usymtab_lookupSafe (uentry_rawName (ue));
871 if (uentry_isUndefined (ue))
877 DPRINTF (("Update sref: %s", uentry_unparseFull (ue)));
878 return (uentry_getSref (ue));
882 /* special case if ind known */
883 inner = s->info->arrayfetch->arr;
884 ret = sRef_updateSref (inner);
892 res = sRef_makeArrayFetch (ret);
898 inner = s->info->field->rec;
899 ret = sRef_updateSref (inner);
907 res = (sRef_makeField (ret, s->info->field->field));
912 inner = s->info->ref;
913 ret = sRef_updateSref (inner);
920 res = sRef_makePointer (ret);
926 inner = s->info->ref;
927 ret = sRef_updateSref (inner);
935 res = sRef_makeAddress (ret);
942 sRef innera = s->info->conj->a;
943 sRef innerb = s->info->conj->b;
944 sRef reta = sRef_updateSref (innera);
945 sRef retb = sRef_updateSref (innerb);
947 if (innera == reta && innerb == retb)
953 res = sRef_makeConj (reta, retb);
964 sRef_getUentry (sRef s)
966 llassert (sRef_isValid (s));
971 return (usymtab_getRefQuiet (paramsScope, s->info->paramno));
973 return (usymtab_getRefQuiet (s->info->cvar->lexlevel, s->info->cvar->index));
976 if (sRef_isCvar (s->info->conj->a) || sRef_isParam (s->info->conj->a)
977 || sRef_isConj (s->info->conj->a))
979 return sRef_getUentry (s->info->conj->a);
983 return sRef_getUentry (s->info->conj->b);
988 return uentry_undefined;
994 sRef_getParam (sRef s)
996 llassert (sRef_isValid (s));
997 llassert (s->kind == SK_PARAM);
999 return s->info->paramno;
1003 sRef_isModified (sRef s)
1005 return (!sRef_isValid (s) || s->modified);
1008 void sRef_setModified (sRef s)
1010 if (sRef_isValid (s))
1015 if (sRef_isRefsField (s))
1017 sRef base = sRef_getBase (s);
1020 llassert (s->kind == SK_FIELD);
1023 if (sRef_isPointer (base))
1025 base = sRef_getBase (base);
1028 if (sRef_isRefCounted (base))
1030 base->aliaskind = AK_NEWREF;
1037 ** note: this side-effects sRefSet to set modified to TRUE
1038 ** for any sRef similar to s.
1042 sRef_canModifyVal (sRef s, sRefSet sl)
1044 if (context_getFlag (FLG_MUSTMOD))
1046 return (sRef_doModifyVal (s, sl));
1050 return (sRef_checkModifyVal (s, sl));
1055 sRef_canModify (sRef s, sRefSet sl)
1058 if (context_getFlag (FLG_MUSTMOD))
1060 return (sRef_doModify (s, sl));
1064 return (sRef_checkModify (s, sl));
1073 bool sRef_checkModifyVal (sRef s, sRefSet sl)
1075 DPRINTF (("Check modify val: %s", sRef_unparse (s)));
1077 if (sRef_isInvalid (s))
1084 case SK_UNCONSTRAINED:
1088 DPRINTF (("Modify var: %s", sRef_unparse (s)));
1090 if (sRef_isFileOrGlobalScope (s))
1092 if (context_checkGlobMod (s))
1094 return (sRefSet_member (sl, s));
1104 return (sRefSet_member (sl, s)
1105 || alkind_isOnly (sRef_getOrigAliasKind (s)));
1107 /* special case if ind known */
1108 return (sRefSet_member (sl, s) ||
1109 sRef_checkModifyVal (s->info->arrayfetch->arr, sl));
1111 return (sRefSet_member (sl, s) || sRef_checkModifyVal (s->info->field->rec, sl));
1113 return (sRefSet_member (sl, s) || sRef_checkModifyVal (s->info->ref, sl));
1115 return (sRefSet_member (sl, s) || sRef_checkModifyVal (s->info->ref, sl));
1117 return ((sRef_checkModifyVal (s->info->conj->a, sl)) &&
1118 (sRef_checkModifyVal (s->info->conj->b, sl)));
1129 switch (s->info->spec)
1131 case SR_NOTHING: return TRUE;
1133 if (context_getFlag (FLG_INTERNALGLOBS))
1135 return (sRefSet_member (sl, s));
1141 case SR_SPECSTATE: return TRUE;
1142 case SR_SYSTEM: return (sRefSet_member (sl, s));
1143 case SR_GLOBALMARKER: BADBRANCH;
1146 case SK_RESULT: BADBRANCH;
1152 ** this should probably be elsewhere...
1154 ** returns TRUE iff sl indicates that s can be modified
1157 static bool sRef_checkModify (sRef s, sRefSet sl)
1159 llassert (sRef_isValid (s));
1163 case SK_UNCONSTRAINED:
1167 if (sRef_isFileOrGlobalScope (s))
1169 if (context_checkGlobMod (s))
1171 return (sRefSet_member (sl, s));
1183 return (sRefSet_member (sl, s) ||
1184 sRef_checkModifyVal (s->info->arrayfetch->arr, sl));
1187 sRef sr = s->info->field->rec;
1189 if (sr->kind == SK_PARAM)
1190 return TRUE; /* structs are copied on call */
1192 return (sRefSet_member (sl, s) || sRef_checkModifyVal (s->info->field->rec, sl));
1198 sm = sRefSet_member (sl, s);
1203 return (sRef_checkModifyVal (s->info->ref, sl));
1206 return (sRefSet_member (sl, s) || sRef_checkModifyVal (s->info->ref, sl));
1208 return ((sRef_checkModify (s->info->conj->a, sl)) &&
1209 (sRef_checkModify (s->info->conj->b, sl)));
1219 switch (s->info->spec)
1221 case SR_NOTHING: return TRUE;
1223 if (context_getFlag (FLG_INTERNALGLOBS))
1225 return (sRefSet_member (sl, s));
1231 case SR_SPECSTATE: return TRUE;
1232 case SR_SYSTEM: return (sRefSet_member (sl, s));
1233 case SR_GLOBALMARKER: BADBRANCH;
1236 case SK_RESULT: BADBRANCH;
1241 cstring sRef_stateVerb (sRef s)
1243 if (sRef_isDead (s))
1245 return cstring_makeLiteralTemp ("released");
1247 else if (sRef_isKept (s))
1249 return cstring_makeLiteralTemp ("kept");
1251 else if (sRef_isDependent (s))
1253 return cstring_makeLiteralTemp ("dependent");
1261 cstring sRef_stateAltVerb (sRef s)
1263 if (sRef_isDead (s))
1265 return cstring_makeLiteralTemp ("live");
1267 else if (sRef_isKept (s))
1269 return cstring_makeLiteralTemp ("not kept");
1271 else if (sRef_isDependent (s))
1273 return cstring_makeLiteralTemp ("independent");
1282 bool sRef_doModifyVal (sRef s, sRefSet sl)
1284 llassert (sRef_isValid (s));
1289 case SK_UNCONSTRAINED:
1293 if (sRef_isFileOrGlobalScope (s))
1296 if (context_checkGlobMod (s))
1298 return (sRefSet_modifyMember (sl, s));
1302 (void) sRefSet_modifyMember (sl, s);
1312 return (sRefSet_modifyMember (sl, s)
1313 || alkind_isOnly (sRef_getOrigAliasKind (s)));
1315 /* special case if ind known */
1316 /* unconditional OR, need side effect */
1317 return (OR (sRefSet_modifyMember (sl, s),
1318 sRef_doModifyVal (s->info->arrayfetch->arr, sl)));
1320 return (OR (sRefSet_modifyMember (sl, s),
1321 sRef_doModifyVal (s->info->field->rec, sl)));
1323 return (OR (sRefSet_modifyMember (sl, s),
1324 sRef_doModifyVal (s->info->ref, sl)));
1326 return (OR (sRefSet_modifyMember (sl, s),
1327 sRef_doModifyVal (s->info->ref, sl)));
1329 return (AND (sRef_doModifyVal (s->info->conj->a, sl) ,
1330 sRef_doModifyVal (s->info->conj->b, sl)));
1340 switch (s->info->spec)
1342 case SR_NOTHING: return TRUE;
1344 if (context_getFlag (FLG_INTERNALGLOBS))
1346 return (sRefSet_modifyMember (sl, s));
1350 (void) sRefSet_modifyMember (sl, s);
1353 case SR_SPECSTATE: return TRUE;
1354 case SR_SYSTEM: return (sRefSet_modifyMember (sl, s));
1355 case SR_GLOBALMARKER: BADBRANCH;
1359 case SK_RESULT: BADBRANCH;
1365 ** this should probably be elsewhere...
1367 ** returns TRUE iff sl indicates that s can be modified
1371 bool sRef_doModify (sRef s, sRefSet sl)
1373 llassert (sRef_isValid (s));
1377 case SK_UNCONSTRAINED:
1381 if (sRef_isFileOrGlobalScope (s))
1383 if (context_checkGlobMod (s))
1385 return (sRefSet_modifyMember (sl, s));
1389 (void) sRefSet_modifyMember (sl, s);
1401 return (OR (sRefSet_modifyMember (sl, s),
1402 sRef_doModifyVal (s->info->arrayfetch->arr, sl)));
1405 sRef sr = s->info->field->rec;
1407 if (sr->kind == SK_PARAM)
1409 return TRUE; /* structs are shallow-copied on call */
1412 return (OR (sRefSet_modifyMember (sl, s),
1413 sRef_doModifyVal (s->info->field->rec, sl)));
1417 return (OR (sRefSet_modifyMember (sl, s),
1418 sRef_doModifyVal (s->info->ref, sl)));
1421 return (OR (sRefSet_modifyMember (sl, s),
1422 sRef_doModifyVal (s->info->ref, sl)));
1424 return (AND (sRef_doModify (s->info->conj->a, sl),
1425 (sRef_doModify (s->info->conj->b, sl))));
1436 switch (s->info->spec)
1438 case SR_NOTHING: return TRUE;
1439 case SR_INTERNAL: return TRUE;
1440 case SR_SPECSTATE: return TRUE;
1441 case SR_SYSTEM: return (sRefSet_modifyMember (sl, s));
1442 case SR_GLOBALMARKER: BADBRANCH;
1445 case SK_RESULT: BADBRANCH;
1450 static /*@exposed@*/ sRef
1451 sRef_leastCommon (/*@exposed@*/ sRef s1, sRef s2)
1453 llassert (sRef_similar (s1, s2));
1455 if (!sRef_isValid (s1)) return s1;
1456 if (!sRef_isValid (s2)) return s1;
1458 sRef_combineDefState (s1, s2);
1459 sRef_combineNullState (s1, s2);
1460 sRef_combineExKinds (s1, s2);
1462 if (s1->aliaskind != s2->aliaskind)
1464 if (s1->aliaskind == AK_UNKNOWN)
1466 s1->aliaskind = s2->aliaskind;
1468 else if (s2->aliaskind == AK_UNKNOWN)
1474 s1->aliaskind = AK_ERROR;
1481 int sRef_compare (sRef s1, sRef s2)
1483 if (s1 == s2) return 0;
1485 if (sRef_isInvalid (s1)) return -1;
1486 if (sRef_isInvalid (s2)) return 1;
1488 INTCOMPARERETURN (s1->kind, s2->kind);
1489 INTCOMPARERETURN (s1->defstate, s2->defstate);
1490 INTCOMPARERETURN (s1->aliaskind, s2->aliaskind);
1492 DPRINTF (("Compare null state: %s / %s",
1493 sRef_unparseFull (s1),
1494 sRef_unparseFull (s2)));
1496 COMPARERETURN (nstate_compare (sRef_getNullState (s1),
1497 sRef_getNullState (s2)));
1502 return (int_compare (s1->info->paramno, s2->info->paramno));
1505 COMPARERETURN (sRef_compare (s1->info->arrayfetch->arr,
1506 s2->info->arrayfetch->arr));
1508 if (s1->info->arrayfetch->indknown && s2->info->arrayfetch->indknown)
1510 return (int_compare (s1->info->arrayfetch->ind,
1511 s2->info->arrayfetch->ind));
1513 if (!s1->info->arrayfetch->indknown && !s2->info->arrayfetch->indknown)
1520 COMPARERETURN (sRef_compare (s1->info->field->rec, s2->info->field->rec));
1522 if (cstring_equal (s1->info->field->field, s2->info->field->field))
1529 return (sRef_compare (s1->info->ref, s2->info->ref));
1531 COMPARERETURN (sRef_compare (s1->info->conj->a, s2->info->conj->a));
1532 return (sRef_compare (s1->info->conj->b, s2->info->conj->b));
1533 case SK_UNCONSTRAINED:
1534 return (cstring_compare (s1->info->fname, s2->info->fname));
1546 return (generic_compare (s1->info->spec, s2->info->spec));
1551 static bool cref_equal (cref c1, cref c2)
1553 return ((c1->lexlevel == c2->lexlevel) &&
1554 (usymId_equal (c1->index, c2->index)));
1558 ** returns true if s1 could be the same storage as s2.
1559 ** i.e., a[?] ~ a[3]. Note its not symmetric ... s1
1560 ** should be more specific.
1564 ** like similar, but matches objects <-> non-objects
1568 sRef_uniqueReference (sRef s)
1570 return (sRef_isFresh (s) || sRef_isUnique (s)
1571 || sRef_isOnly (s) || sRef_isStack (s)
1572 || sRef_isAddress (s));
1576 sRef_similarRelaxedAux (sRef s1, sRef s2)
1580 if (sRef_isUnknownArrayFetch (s1))
1590 if (sRef_isInvalid (s1) || sRef_isInvalid (s2)) return FALSE;
1592 if (sRef_isConj (s2))
1593 return (sRef_similarRelaxedAux (s1, sRef_getConjA (s2)) ||
1594 sRef_similarRelaxedAux (s1, sRef_getConjB (s2)));
1599 return ((s2->kind == SK_CVAR)
1600 && (cref_equal (s1->info->cvar, s2->info->cvar)));
1602 return ((s2->kind == SK_PARAM)
1603 && (s1->info->paramno == s2->info->paramno));
1605 if (s2->kind == SK_ARRAYFETCH)
1607 if (sRef_similarRelaxedAux (s1->info->arrayfetch->arr,
1608 s2->info->arrayfetch->arr))
1610 if (s1->info->arrayfetch->indknown)
1612 if (s2->info->arrayfetch->indknown)
1614 return (s1->info->arrayfetch->ind == s2->info->arrayfetch->ind);
1629 return ((s2->kind == SK_FIELD
1630 && (sRef_similarRelaxedAux (s1->info->field->rec,
1631 s2->info->field->rec)
1632 && cstring_equal (s1->info->field->field,
1633 s2->info->field->field))));
1635 return ((s2->kind == SK_PTR)
1636 && sRef_similarRelaxedAux (s1->info->ref, s2->info->ref));
1638 return ((s2->kind == SK_ADR)
1639 && sRef_similarRelaxedAux (s1->info->ref, s2->info->ref));
1641 return ((sRef_similarRelaxedAux (s1->info->conj->a, s2) ||
1642 (sRef_similarRelaxedAux (s1->info->conj->b, s2))));
1644 return (s1->info->spec == s2->info->spec);
1645 case SK_UNCONSTRAINED:
1646 return (cstring_equal (s1->info->fname, s2->info->fname));
1661 sRef_similarRelaxed (sRef s1, sRef s2)
1667 if (sRef_isThroughArrayFetch (s1))
1677 if (sRef_isInvalid (s1) || sRef_isInvalid (s2)) return FALSE;
1679 us1 = sRef_uniqueReference (s1);
1680 us2 = sRef_uniqueReference (s2);
1682 if ((s1->kind == SK_EXTERNAL && (s2->kind != SK_EXTERNAL && !us2))
1683 || (s2->kind == SK_EXTERNAL && (s1->kind != SK_EXTERNAL && !us1)))
1686 ** Previously, also:
1687 ** || (sRef_isExposed (s1) && !us2) || (sRef_isExposed (s2) && !us1)) ????
1689 ** No clue why this was there?!
1693 if (sRef_isExposed (s1) && sRef_isCvar (s1))
1695 uentry ue1 = sRef_getUentry (s1);
1697 if (uentry_isRefParam (ue1))
1699 return sRef_similarRelaxedAux (s1, s2);
1703 if (sRef_isExposed (s2) && sRef_isCvar (s2))
1705 uentry ue2 = sRef_getUentry (s2);
1707 if (uentry_isRefParam (ue2))
1709 return sRef_similarRelaxedAux (s1, s2);
1713 return (ctype_match (s1->type, s2->type));
1717 return sRef_similarRelaxedAux (s1, s2);
1722 sRef_similar (sRef s1, sRef s2)
1724 if (s1 == s2) return TRUE;
1725 if (sRef_isInvalid (s1) || sRef_isInvalid (s2)) return FALSE;
1727 if (sRef_isConj (s2))
1729 return (sRef_similar (s1, sRef_getConjA (s2)) ||
1730 sRef_similar (s1, sRef_getConjB (s2)));
1733 if (sRef_isDerived (s2))
1735 return (sRef_includedBy (s1, s2->info->ref));
1741 return ((s2->kind == SK_CVAR)
1742 && (cref_equal (s1->info->cvar, s2->info->cvar)));
1744 return ((s2->kind == SK_PARAM)
1745 && (s1->info->paramno == s2->info->paramno));
1747 if (s2->kind == SK_ARRAYFETCH)
1749 if (sRef_similar (s1->info->arrayfetch->arr,
1750 s2->info->arrayfetch->arr))
1752 if (s1->info->arrayfetch->indknown)
1754 if (s2->info->arrayfetch->indknown)
1756 return (s1->info->arrayfetch->ind == s2->info->arrayfetch->ind);
1771 if (s2->kind == SK_PTR)
1773 if (sRef_similar (s1->info->arrayfetch->arr,
1783 return ((s2->kind == SK_FIELD
1784 && (sRef_similar (s1->info->field->rec,
1785 s2->info->field->rec)
1786 && cstring_equal (s1->info->field->field,
1787 s2->info->field->field))));
1789 if (s2->kind == SK_PTR)
1791 return sRef_similar (s1->info->ref, s2->info->ref);
1795 if (s2->kind == SK_ARRAYFETCH)
1797 if (sRef_similar (s2->info->arrayfetch->arr,
1807 return ((s2->kind == SK_ADR)
1808 && sRef_similar (s1->info->ref, s2->info->ref));
1810 return ((sRef_similar (s1->info->conj->a, s2) ||
1811 (sRef_similar (s1->info->conj->b, s2))));
1813 return (sRef_includedBy (s2, s1->info->ref));
1814 case SK_UNCONSTRAINED:
1815 return (s2->kind == SK_UNCONSTRAINED
1816 && cstring_equal (s1->info->fname, s2->info->fname));
1826 return (s2->kind == SK_SPECIAL
1827 && (s1->info->spec == s2->info->spec));
1830 /*@notreached@*/ DPRINTF (("Fell through for: %s / %s", sRef_unparse (s1), sRef_unparse (s2)));
1835 ** return TRUE iff small can be derived from big.
1837 ** (e.g. x, x.a is includedBy x;
1838 ** x.a is included By x.a;
1842 sRef_includedBy (sRef small, sRef big)
1844 if (small == big) return TRUE;
1845 if (sRef_isInvalid (small) || sRef_isInvalid (big)) return FALSE;
1847 if (sRef_isConj (big))
1848 return (sRef_similar (small, sRef_getConjA (big)) ||
1849 sRef_similar (small, sRef_getConjB (big)));
1851 switch (small->kind)
1855 return (sRef_same (small, big));
1857 if (big->kind == SK_ARRAYFETCH)
1859 if (sRef_same (small->info->arrayfetch->arr, big->info->arrayfetch->arr))
1861 if (small->info->arrayfetch->indknown)
1863 if (big->info->arrayfetch->indknown)
1865 return (small->info->arrayfetch->ind == big->info->arrayfetch->ind);
1878 return (sRef_includedBy (small->info->arrayfetch->arr, big));
1880 if (big->kind == SK_FIELD)
1883 (sRef_same (small->info->field->rec, big->info->field->rec) &&
1884 cstring_equal (small->info->field->field, big->info->field->field));
1888 return (sRef_includedBy (small->info->field->rec, big));
1892 if (big->kind == SK_PTR)
1894 return sRef_same (small->info->ref, big->info->ref);
1898 return (sRef_includedBy (small->info->ref, big));
1902 return ((big->kind == SK_ADR) && sRef_similar (small->info->ref, big->info->ref));
1904 return ((sRef_includedBy (small->info->conj->a, big) ||
1905 (sRef_includedBy (small->info->conj->b, big))));
1907 return (sRef_includedBy (small->info->ref, big));
1908 case SK_UNCONSTRAINED:
1918 switch (small->info->spec)
1920 case SR_NOTHING: return TRUE;
1922 case SR_INTERNAL: return (sRef_isSpecInternalState (big) ||
1923 sRef_isFileStatic (big));
1924 case SR_SYSTEM: return (sRef_isSystemState (big));
1925 case SR_GLOBALMARKER: BADBRANCH;
1932 ** Same is similar to similar, but not quite the same.
1933 ** same and realSame aren't the same, but they are really similar.
1934 ** similarly, same is the same as same. but realSame is
1935 ** not really the same as same, or similar to similar.
1937 ** Similarly to similar, same checks if two sRefs are the same.
1938 ** The similarities end, however, when same compares arrays
1939 ** with unknown indexes. Similar returns false; same returns true.
1941 ** Similarly to similar and same, realSame is the same as same,
1942 ** except they do not behave the same when face with unknown
1943 ** sRefs. Same thinks they are not the same, but realSame thinks
1949 sRef_realSame (sRef s1, sRef s2)
1951 if (s1 == s2) return TRUE;
1952 if (sRef_isInvalid (s1) || sRef_isInvalid (s2)) return FALSE;
1957 return ((s2->kind == SK_CVAR) && (cref_equal (s1->info->cvar, s2->info->cvar)));
1959 return ((s2->kind == SK_PARAM) && (s1->info->paramno == s2->info->paramno));
1961 if (s2->kind == SK_ARRAYFETCH)
1963 if (sRef_realSame (s1->info->arrayfetch->arr, s2->info->arrayfetch->arr))
1965 if (s1->info->arrayfetch->indknown && s2->info->arrayfetch->indknown)
1967 return (s1->info->arrayfetch->ind == s2->info->arrayfetch->ind);
1969 if (!s1->info->arrayfetch->indknown && !s2->info->arrayfetch->indknown)
1978 return ((s2->kind == SK_FIELD &&
1979 (sRef_realSame (s1->info->field->rec, s2->info->field->rec) &&
1980 cstring_equal (s1->info->field->field, s2->info->field->field))));
1982 return ((s2->kind == SK_PTR) && sRef_realSame (s1->info->ref, s2->info->ref));
1984 return ((s2->kind == SK_ADR) && sRef_realSame (s1->info->ref, s2->info->ref));
1986 return ((sRef_realSame (s1->info->conj->a, s2) ||
1987 (sRef_realSame (s1->info->conj->b, s2))));
1989 return ((s2->kind == SK_OBJECT)
1990 && ctype_match (s1->info->object, s2->info->object));
1992 return ((s2->kind == SK_EXTERNAL)
1993 && sRef_realSame (s1->info->ref, s2->info->ref));
1995 return ((s2->kind == SK_SPECIAL) && s1->info->spec == s2->info->spec);
1997 return ((s2->kind == SK_DERIVED) && sRef_realSame (s1->info->ref, s2->info->ref));
1998 case SK_UNCONSTRAINED:
1999 return ((s2->kind == SK_UNCONSTRAINED)
2000 && (cstring_equal (s1->info->fname, s2->info->fname)));
2006 return TRUE; /* changed this! was false */
2012 sRef_sameObject (sRef s1, sRef s2)
2018 ** same is similar to similar, but not quite the same.
2020 ** Similarly to similar, same checks is two sRefs are the same.
2021 ** The similarities end, however, when same compares arrays
2022 ** with unknown indexes. Similar returns false; same returns true.
2026 sRef_same (sRef s1, sRef s2)
2028 if (s1 == s2) return TRUE;
2029 if (sRef_isInvalid (s1) || sRef_isInvalid (s2)) return FALSE;
2034 return ((s2->kind == SK_CVAR) && (cref_equal (s1->info->cvar, s2->info->cvar)));
2036 return ((s2->kind == SK_PARAM) && (s1->info->paramno == s2->info->paramno));
2038 if (s2->kind == SK_ARRAYFETCH)
2040 llassert (s1->info->field->rec != s1);
2041 if (sRef_same (s1->info->arrayfetch->arr, s2->info->arrayfetch->arr))
2043 if (s1->info->arrayfetch->indknown && s2->info->arrayfetch->indknown)
2045 return (s1->info->arrayfetch->ind == s2->info->arrayfetch->ind);
2053 llassert (s1->info->field->rec != s1);
2054 return ((s2->kind == SK_FIELD &&
2055 (sRef_same (s1->info->field->rec, s2->info->field->rec) &&
2056 cstring_equal (s1->info->field->field, s2->info->field->field))));
2060 llassert (s1->info->ref != s1);
2061 return ((s2->kind == SK_PTR) && sRef_same (s1->info->ref, s2->info->ref));
2065 llassert (s1->info->ref != s1);
2066 return ((s2->kind == SK_ADR) && sRef_same (s1->info->ref, s2->info->ref));
2069 llassert (s1->info->conj->a != s1);
2070 llassert (s1->info->conj->b != s1);
2071 return ((sRef_same (s1->info->conj->a, s2)) && /* or or and? */
2072 (sRef_same (s1->info->conj->b, s2)));
2074 return ((s2->kind == SK_SPECIAL) && s1->info->spec == s2->info->spec);
2076 llassert (s1->info->ref != s1);
2077 return ((s2->kind == SK_DERIVED) && sRef_same (s1->info->ref, s2->info->ref));
2079 case SK_UNCONSTRAINED:
2092 ** sort of similar, for use in def/use
2096 sRef_closeEnough (sRef s1, sRef s2)
2098 if (s1 == s2) return TRUE;
2099 if (sRef_isInvalid (s1) || sRef_isInvalid (s2)) return FALSE;
2104 return (((s2->kind == SK_CVAR) &&
2105 (cref_equal (s1->info->cvar, s2->info->cvar))) ||
2106 (s2->kind == SK_UNCONSTRAINED && s1->info->cvar->lexlevel == 0));
2107 case SK_UNCONSTRAINED:
2108 return (s2->kind == SK_UNCONSTRAINED
2109 || ((s2->kind == SK_CVAR) && (s2->info->cvar->lexlevel == 0)));
2111 return ((s2->kind == SK_PARAM)
2112 && (s1->info->paramno == s2->info->paramno));
2114 if (s2->kind == SK_ARRAYFETCH)
2116 if (sRef_closeEnough (s1->info->arrayfetch->arr, s2->info->arrayfetch->arr))
2118 if (s1->info->arrayfetch->indknown && s2->info->arrayfetch->indknown)
2120 return (s1->info->arrayfetch->ind == s2->info->arrayfetch->ind);
2127 return ((s2->kind == SK_FIELD &&
2128 (sRef_closeEnough (s1->info->field->rec, s2->info->field->rec) &&
2129 cstring_equal (s1->info->field->field, s2->info->field->field))));
2131 return ((s2->kind == SK_PTR) && sRef_closeEnough (s1->info->ref, s2->info->ref));
2133 return ((s2->kind == SK_ADR) && sRef_closeEnough (s1->info->ref, s2->info->ref));
2135 return ((s2->kind == SK_DERIVED) && sRef_closeEnough (s1->info->ref, s2->info->ref));
2137 return ((sRef_closeEnough (s1->info->conj->a, s2)) ||
2138 (sRef_closeEnough (s1->info->conj->b, s2)));
2140 return ((s2->kind == SK_SPECIAL) && s1->info->spec == s2->info->spec);
2156 s is an sRef of a formal paramenter in a function call constraint
2157 we trys to return a constraint expression derived from the actual parementer of a function call.
2160 /*@only@*/ constraintExpr sRef_fixConstraintParam (/*@observer@*/ sRef s, /*@observer@*/ /*@temp@*/ exprNodeList args)
2164 if (sRef_isInvalid (s))
2165 llfatalbug((message("Invalid sRef")));
2171 // s = sRef_saveCopy(s);
2172 ce = constraintExpr_makeTermsRef (s);
2179 temp = (sRef_makeField (sRef_fixBaseParam (s->info->field->rec, args),
2180 s->info->field->field));
2181 ce = constraintExpr_makeTermsRef (temp);
2187 temp = (sRef_makePointer (sRef_fixBaseParam (s->info->ref, args)));
2188 //temp = sRef_saveCopy(temp);
2189 ce = constraintExpr_makeTermsRef (temp);
2196 temp = sRef_saveCopy(s);
2197 temp = sRef_fixBaseParam (temp, args);
2198 ce = constraintExpr_makeTermsRef (temp);
2206 temp = sRef_saveCopy(s);
2207 ce = constraintExpr_makeTermsRef (temp);
2212 llassert(exprNodeList_size (args) > s->info->paramno);
2214 exprNode e = exprNodeList_nth (args, s->info->paramno);
2216 llassert( !(exprNode_isError (e)) );
2217 ce = constraintExpr_makeExprNode (e);
2224 llcontbug (message ("Trying to do fixConstraintParam on nonparam, nonglobal: %q for function with arguments %q",
2225 sRef_unparse (s), exprNodeList_unparse(args)));
2226 temp = sRef_saveCopy(s);
2227 ce = constraintExpr_makeTermsRef (temp);
2239 sRef_fixBaseParam (/*@returned@*/ sRef s, exprNodeList args)
2241 if (sRef_isInvalid (s)) return (sRef_undefined);
2245 case SK_UNCONSTRAINED:
2250 if (exprNodeList_size (args) > s->info->paramno)
2252 exprNode e = exprNodeList_nth (args, s->info->paramno);
2254 if (exprNode_isError (e))
2256 return sRef_makeUnknown ();
2259 return (exprNode_getSref (e));
2263 return sRef_makeUnknown ();
2268 if (s->info->arrayfetch->indknown)
2270 return (sRef_makeArrayFetchKnown
2271 (sRef_fixBaseParam (s->info->arrayfetch->arr, args),
2272 s->info->arrayfetch->ind));
2276 return (sRef_makeArrayFetch
2277 (sRef_fixBaseParam (s->info->arrayfetch->arr, args)));
2280 return (sRef_makeField (sRef_fixBaseParam (s->info->field->rec, args),
2281 s->info->field->field));
2284 return (sRef_makePointer (sRef_fixBaseParam (s->info->ref, args)));
2287 return (sRef_makeAddress (sRef_fixBaseParam (s->info->ref, args)));
2290 return (sRef_makeConj (sRef_fixBaseParam (s->info->conj->a, args),
2291 sRef_fixBaseParam (s->info->conj->b, args)));
2307 sRef_undumpGlobal (char **c)
2317 usymId uid = usymId_fromInt (reader_getInt (c));
2322 reader_checkChar (c, '@');
2323 defstate = sstate_fromInt (reader_getInt (c));
2325 reader_checkChar (c, '@');
2326 nullstate = nstate_fromInt (reader_getInt (c));
2328 ret = sRef_makeGlobal (uid, ctype_unknown, stateInfo_currentLoc ());
2329 sRef_setNullStateN (ret, nullstate);
2330 ret->defstate = defstate;
2335 int i = reader_getInt (c);
2336 speckind sk = speckind_fromInt (i);
2340 case SR_NOTHING: return (sRef_makeNothing ());
2341 case SR_INTERNAL: return (sRef_makeInternalState ());
2342 case SR_SPECSTATE: return (sRef_makeSpecState ());
2343 case SR_SYSTEM: return (sRef_makeSystemState ());
2344 case SR_GLOBALMARKER: BADBRANCH;
2349 return sRef_undefined;
2351 return sRef_makeUnknown ();
2353 return sRef_makeUnknown ();
2355 llfatalerror (message ("sRef_undumpGlobal: bad line: %s",
2356 cstring_fromChars (*c)));
2361 static /*@exposed@*/ sRef sRef_undumpBody (char **c)
2370 return (sRef_makeGlobal (usymId_fromInt (reader_getInt (c)), ctype_unknown, stateInfo_currentLoc ()));
2372 return (sRef_makeParam (reader_getInt (c), ctype_unknown, stateInfo_makeLoc (g_currentloc)));
2374 return (sRef_makeResult (ctype_undump (c)));
2377 if ((**c >= '0' && **c <= '9') || **c == '-')
2379 int i = reader_getInt (c);
2380 sRef arr = sRef_undump (c);
2381 sRef ret = sRef_buildArrayFetchKnown (arr, i);
2387 sRef arr = sRef_undump (c);
2388 sRef ret = sRef_buildArrayFetch (arr);
2395 cstring fname = cstring_undefined;
2400 fname = cstring_appendChar (fname, **c);
2405 ret = sRef_buildField (sRef_undump (c), fname);
2406 cstring_markOwned (fname);
2411 int i = reader_getInt (c);
2412 speckind sk = speckind_fromInt (i);
2416 case SR_NOTHING: return (sRef_makeNothing ());
2417 case SR_INTERNAL: return (sRef_makeInternalState ());
2418 case SR_SPECSTATE: return (sRef_makeSpecState ());
2419 case SR_SYSTEM: return (sRef_makeSystemState ());
2420 case SR_GLOBALMARKER: BADBRANCH;
2426 sRef ptr = sRef_undump (c);
2427 sRef ret = sRef_makePointer (ptr);
2433 sRef adr = sRef_undump (c);
2434 sRef ret = sRef_makeAddress (adr);
2440 return (sRef_makeObject (ctype_undump (c)));
2444 sRef s1 = sRef_undump (c);
2445 sRef s2 = ((*c)++, sRef_undump (c));
2446 sRef ret = sRef_makeConj (s1, s2);
2451 return sRef_undefined;
2453 return sRef_makeUnknown ();
2455 return sRef_makeUnknown ();
2457 llfatalerror (message ("sRef_undump: bad line: %s", cstring_fromChars (*c)));
2462 /*@exposed@*/ sRef sRef_undump (char **c)
2464 sRef res = sRef_undumpBody (c);
2466 if (reader_optCheckChar (c, '='))
2468 multiVal mv = multiVal_undump (c);
2469 sRef_setValue (res, mv);
2470 reader_checkChar (c, '=');
2476 static /*@only@*/ cstring sRef_dumpBody (sRef s)
2478 if (sRef_isInvalid (s))
2480 return (cstring_makeLiteral ("-"));
2487 return (message ("p%d", s->info->paramno));
2489 if (s->info->arrayfetch->indknown)
2491 return (message ("a%d%q", s->info->arrayfetch->ind,
2492 sRef_dump (s->info->arrayfetch->arr)));
2496 return (message ("a%q", sRef_dump (s->info->arrayfetch->arr)));
2499 return (message ("f%s.%q", s->info->field->field,
2500 sRef_dump (s->info->field->rec)));
2502 return (message ("t%q", sRef_dump (s->info->ref)));
2504 return (message ("d%q", sRef_dump (s->info->ref)));
2506 return (message ("o%q", ctype_dump (s->info->object)));
2508 return (message ("s%d", (int) s->info->spec));
2510 return (message ("c%q.%q",
2511 sRef_dump (s->info->conj->a),
2512 sRef_dump (s->info->conj->b)));
2514 if (sRef_isFileOrGlobalScope (s))
2516 return (message ("g%d",
2517 usymtab_convertId (s->info->cvar->index)));
2521 llcontbug (message ("Dumping local variable: %q",
2522 sRef_unparseDebug (s)));
2523 return (cstring_makeLiteral ("u"));
2526 return (cstring_makeLiteral ("u"));
2528 return (message ("r%q", ctype_dump (s->type)));
2534 case SK_UNCONSTRAINED:
2535 llcontbug (message ("sRef_dump: bad kind: %q",
2536 sRef_unparseFull (s)));
2537 return (cstring_makeLiteral ("x"));
2544 /*@only@*/ cstring sRef_dump (sRef s)
2546 cstring res = sRef_dumpBody (s);
2548 if (sRef_hasValue (s))
2550 res = message ("%q=%q=", res, multiVal_dump (sRef_getValue (s)));
2556 cstring sRef_dumpGlobal (sRef s)
2558 llassert (!sRef_hasValue (s));
2560 if (sRef_isInvalid (s))
2562 return (cstring_makeLiteral ("-"));
2569 if (sRef_isFileOrGlobalScope (s))
2571 return (message ("g%d@%d@%d",
2572 usymtab_convertId (s->info->cvar->index),
2574 (int) sRef_getNullState (s)));
2578 llcontbug (message ("Dumping local variable: %q",
2579 sRef_unparseDebug (s)));
2580 return (cstring_makeLiteral ("u"));
2583 return (cstring_makeLiteral ("u"));
2585 return (message ("s%d", (int) s->info->spec));
2587 llcontbug (message ("sRef_dumpGlobal: bad kind: %q",
2588 sRef_unparseFull (s)));
2589 return (cstring_makeLiteral ("x"));
2597 sRef_deriveType (sRef s, uentryList cl)
2599 if (sRef_isInvalid (s)) return ctype_unknown;
2604 return (uentry_getType (usymtab_getRefQuiet (s->info->cvar->lexlevel,
2605 s->info->cvar->index)));
2606 case SK_UNCONSTRAINED:
2607 return (ctype_unknown);
2609 if (s->info->paramno >= 0)
2611 return uentry_getType (uentryList_getN (cl, s->info->paramno));
2615 return ctype_unknown;
2619 ctype ca = sRef_deriveType (s->info->arrayfetch->arr, cl);
2621 if (ctype_isArray (ca))
2623 return (ctype_baseArrayPtr (ca));
2625 else if (ctype_isUnknown (ca))
2631 llcontbuglit ("sRef_deriveType: inconsistent array type");
2637 ctype ct = sRef_deriveType (s->info->field->rec, cl);
2639 if (ctype_isStructorUnion (ct))
2641 uentry ue = uentryList_lookupField (ctype_getFields (ct),
2642 s->info->field->field);
2644 if (uentry_isValid (ue))
2646 return (uentry_getType (ue));
2650 llcontbuglit ("sRef_deriveType: bad field");
2651 return ctype_unknown;
2654 else if (ctype_isUnknown (ct))
2660 llcontbuglit ("sRef_deriveType: inconsistent field type");
2666 ctype ct = sRef_deriveType (s->info->ref, cl);
2668 if (ctype_isUnknown (ct)) return ct;
2669 if (ctype_isPointer (ct)) return (ctype_baseArrayPtr (ct));
2672 llcontbuglit ("sRef_deriveType: inconsistent pointer type");
2678 ctype ct = sRef_deriveType (s->info->ref, cl);
2680 if (ctype_isUnknown (ct)) return ct;
2681 return ctype_makePointer (ct);
2685 return sRef_deriveType (s->info->ref, cl);
2689 return (s->info->object);
2693 return (ctype_makeConj (sRef_deriveType (s->info->conj->a, cl),
2694 sRef_deriveType (s->info->conj->b, cl)));
2706 return ctype_unknown;
2712 sRef_getType (sRef s)
2714 if (sRef_isInvalid (s)) return ctype_unknown;
2720 sRef_unparseOpt (sRef s)
2722 sRef rb = sRef_getRootBase (s);
2724 if (sRef_isMeaningful (rb) && !sRef_isConst (rb))
2726 cstring ret = sRef_unparse (s);
2728 llassertprint (!cstring_equalLit (ret, "?"), ("print: %s", sRef_unparseDebug (s)));
2730 if (!cstring_isEmpty (ret))
2732 return (cstring_appendChar (ret, ' '));
2740 return cstring_undefined;
2744 sRef_unparsePreOpt (sRef s)
2746 sRef rb = sRef_getRootBase (s);
2748 if (sRef_isMeaningful (rb) && !sRef_isConst (rb))
2750 cstring ret = sRef_unparse (s);
2752 llassertprint (!cstring_equalLit (ret, "?"), ("print: %s", sRef_unparseDebug (s)));
2753 return (cstring_prependCharO (' ', ret));
2756 return cstring_undefined;
2760 sRef_unparse (sRef s)
2762 if (sRef_isInvalid (s)) return (cstring_makeLiteral ("?"));
2764 if (context_inFunctionLike ())
2766 return (sRef_unparseWithArgs (s, context_getParams ()));
2770 DPRINTF (("Not in function like: %s", context_unparse ()));
2771 return (sRef_unparseNoArgs (s));
2775 static /*@only@*/ cstring
2776 sRef_unparseWithArgs (sRef s, uentryList args)
2778 if (sRef_isInvalid (s))
2780 return (cstring_makeLiteral ("?"));
2786 return (uentry_getName (usymtab_getRefQuiet (s->info->cvar->lexlevel,
2787 s->info->cvar->index)));
2788 case SK_UNCONSTRAINED:
2789 return (cstring_copy (s->info->fname));
2792 if (s->info->paramno < uentryList_size (args)
2793 && s->info->paramno >= 0)
2795 uentry ue = uentryList_getN (args, s->info->paramno);
2797 if (uentry_isValid (ue))
2798 return uentry_getName (ue);
2801 return (message ("<bad param: %q / args %q",
2802 sRef_unparseDebug (s),
2803 uentryList_unparse (args)));
2806 if (s->info->arrayfetch->indknown)
2808 return (message ("%q[%d]", sRef_unparseWithArgs (s->info->arrayfetch->arr, args),
2809 s->info->arrayfetch->ind));
2813 return (message ("%q[]", sRef_unparseWithArgs (s->info->arrayfetch->arr, args)));
2816 if (s->info->field->rec->kind == SK_PTR)
2818 sRef ptr = s->info->field->rec;
2820 return (message ("%q->%s", sRef_unparseWithArgs (ptr->info->ref, args),
2821 s->info->field->field));
2823 return (message ("%q.%s", sRef_unparseWithArgs (s->info->field->rec, args),
2824 s->info->field->field));
2828 sRef ref = sRef_fixConj (s->info->ref);
2829 skind sk = ref->kind;
2834 ret = message ("storage pointed to by %q",
2835 sRef_unparseWithArgs (ref, args));
2837 else if (skind_isSimple (sk) || sk == SK_PTR)
2839 ret = message ("*%q", sRef_unparseWithArgs (ref, args));
2843 ret = message ("*(%q)", sRef_unparseWithArgs (ref, args));
2849 return (message ("&%q", sRef_unparseWithArgs (s->info->ref, args)));
2851 return (cstring_copy (ctype_unparse (s->info->object)));
2853 return (sRef_unparseWithArgs (sRef_getConjA (s), args));
2855 if (cstring_isDefined (s->info->fname))
2857 return (message ("[result of %s]", s->info->fname));
2861 return (cstring_makeLiteral ("<new>"));
2864 return (cstring_makeLiteral ("?"));
2866 return (message ("<derived %q>", sRef_unparse (s->info->ref)));
2868 return (message ("<external %q>", sRef_unparse (s->info->ref)));
2870 return (message ("<type %s>", ctype_unparse (s->type)));
2872 return (message ("<const %s>", ctype_unparse (s->type)));
2874 switch (s->info->spec)
2876 case SR_NOTHING: return cstring_makeLiteral ("nothing");
2877 case SR_INTERNAL: return cstring_makeLiteral ("internal state");
2878 case SR_SPECSTATE: return cstring_makeLiteral ("spec state");
2879 case SR_SYSTEM: return cstring_makeLiteral ("file system state");
2880 case SR_GLOBALMARKER: return cstring_makeLiteral ("<global marker>");
2884 return cstring_makeLiteral ("result");
2887 llbug (message ("Bad sref, kind = %d", (int) s->kind));
2895 sRef_unparseDebug (sRef s)
2897 if (sRef_isInvalid (s))
2899 return (cstring_makeLiteral ("<undef>"));
2905 case SK_UNCONSTRAINED:
2906 return (message ("<unconstrained %s>", s->info->fname));
2911 ce = usymtab_getRefQuiet (s->info->cvar->lexlevel, s->info->cvar->index);
2913 if (uentry_isInvalid (ce))
2915 return (message ("<scope: %d.%d *invalid*>",
2916 s->info->cvar->lexlevel,
2917 s->info->cvar->index));
2921 return (message ("<scope: %d.%d *%q*>",
2922 s->info->cvar->lexlevel,
2923 s->info->cvar->index,
2924 uentry_getName (ce)));
2930 return (message ("<parameter %d>", s->info->paramno + 1));
2933 if (s->info->arrayfetch->indknown)
2935 return (message ("%q[%d]", sRef_unparseDebug (s->info->arrayfetch->arr),
2936 s->info->arrayfetch->ind));
2940 return (message ("%q[]", sRef_unparseDebug (s->info->arrayfetch->arr)));
2943 return (message ("%q.%s", sRef_unparseDebug (s->info->field->rec),
2944 s->info->field->field));
2946 if (sRef_isField (s->info->ref))
2948 sRef fld = s->info->ref;
2950 return (message ("%q->%s", sRef_unparseDebug (fld->info->field->rec),
2951 fld->info->field->field));
2955 return (message ("*(%q)", sRef_unparseDebug (s->info->ref)));
2958 return (message ("&%q", sRef_unparseDebug (s->info->ref)));
2960 return (message ("<object type %s>", ctype_unparse (s->info->object)));
2962 return (message ("%q | %q", sRef_unparseDebug (s->info->conj->a),
2963 sRef_unparseDebug (s->info->conj->b)));
2965 return message ("<new: %s>", s->info->fname);
2967 return (message ("<derived %q>", sRef_unparseDebug (s->info->ref)));
2969 return (message ("<external %q>", sRef_unparseDebug (s->info->ref)));
2971 return (message ("<type %s>", ctype_unparse (s->type)));
2973 if (sRef_hasValue (s))
2975 return (message ("<const %s=%q>", ctype_unparse (s->type), multiVal_unparse (sRef_getValue (s))));
2979 return (message ("<const %s>", ctype_unparse (s->type)));
2982 return (message ("<result %s>", ctype_unparse (s->type)));
2984 return (message ("<spec %s>",
2985 cstring_makeLiteralTemp
2986 (s->info->spec == SR_NOTHING ? "nothing"
2987 : s->info->spec == SR_INTERNAL ? "internalState"
2988 : s->info->spec == SR_SPECSTATE ? "spec state"
2989 : s->info->spec == SR_SYSTEM ? "fileSystem"
2992 return cstring_makeLiteral ("<unknown>");
2998 static /*@only@*/ cstring
2999 sRef_unparseNoArgs (sRef s)
3001 if (sRef_isInvalid (s)) return (cstring_makeLiteral ("?"));
3005 case SK_UNCONSTRAINED:
3006 return (cstring_copy (s->info->fname));
3009 uentry ce = usymtab_getRefQuiet (s->info->cvar->lexlevel,
3010 s->info->cvar->index);
3012 if (uentry_isInvalid (ce))
3014 llcontbug (message ("sRef_unparseNoArgs: bad cvar: %q",
3015 sRef_unparseDebug (s)));
3016 return (sRef_unparseDebug (s));
3020 return (uentry_getName (ce));
3024 if (s->info->arrayfetch->indknown)
3026 return (message ("%q[%d]", sRef_unparseNoArgs (s->info->arrayfetch->arr),
3027 s->info->arrayfetch->ind));
3031 return (message ("%q[]", sRef_unparseNoArgs (s->info->arrayfetch->arr)));
3034 return (message ("%q.%s", sRef_unparseNoArgs (s->info->field->rec),
3035 s->info->field->field));
3038 sRef ref = sRef_fixConj (s->info->ref);
3039 skind sk = ref->kind;
3042 if (skind_isSimple (sk) || sk == SK_PTR)
3044 ret = message ("*%q", sRef_unparseNoArgs (ref));
3048 ret = message ("*(%q)", sRef_unparseNoArgs (ref));
3054 return (message ("&%q", sRef_unparseNoArgs (s->info->ref)));
3056 return (cstring_copy (ctype_unparse (s->info->object)));
3058 return (sRef_unparseNoArgs (s->info->conj->a));
3060 return (message ("result of %s", s->info->fname));
3062 return (message ("<der %q>", sRef_unparseNoArgs (s->info->ref)));
3064 return message ("<ext %q>", sRef_unparseNoArgs (s->info->ref));
3066 return (cstring_makeLiteral
3067 (s->info->spec == SR_NOTHING ? "nothing"
3068 : s->info->spec == SR_INTERNAL ? "internal state"
3069 : s->info->spec == SR_SPECSTATE ? "spec state"
3070 : s->info->spec == SR_SYSTEM ? "file system state"
3073 return cstring_makeLiteral ("result");
3077 return cstring_makeLiteral ("?");
3079 /* llcontbug (message ("sRef_unparseNoArgs: bad case: %q", sRef_unparseDebug (s))); */
3080 return (sRef_unparseDebug (s));
3085 /*@dependent@*/ sRef sRef_makeUnconstrained (cstring fname)
3087 sRef s = sRef_new ();
3089 s->kind = SK_UNCONSTRAINED;
3090 s->info = (sinfo) dmalloc (sizeof (*s->info));
3091 s->info->fname = fname;
3096 cstring sRef_unconstrainedName (sRef s)
3098 llassert (sRef_isUnconstrained (s));
3100 return s->info->fname;
3103 bool sRef_isUnconstrained (sRef s)
3105 return (sRef_isValid(s) && s->kind == SK_UNCONSTRAINED);
3108 static /*@dependent@*/ /*@notnull@*/ sRef
3109 sRef_makeCvarAux (int level, usymId index, ctype ct, /*@only@*/ stateInfo stinfo)
3111 sRef s = sRef_newRef ();
3114 s->info = (sinfo) dmalloc (sizeof (*s->info));
3116 s->info->cvar = (cref) dmalloc (sizeof (*s->info->cvar));
3117 s->info->cvar->lexlevel = level;
3118 s->info->cvar->index = index;
3120 /* for now, all globals are defined; all locals, aren't */
3122 if (level <= fileScope)
3124 s->defstate = SS_UNKNOWN;
3128 ctype rct = ctype_realType (ct);
3130 if (level != paramsScope
3131 && (ctype_isStructorUnion (rct) || ctype_isRealArray (rct)))
3133 s->defstate = SS_ALLOCATED;
3134 s->oaliaskind = s->aliaskind = AK_STACK;
3138 s->defstate = SS_UNDEFINED;
3139 s->oaliaskind = s->aliaskind = AK_LOCAL;
3145 llassert (level >= globScope);
3146 llassert (usymId_isValid (index));
3148 DPRINTF (("Made cvar: [%p] %s", s, sRef_unparseDebug (s)));
3149 llassert (valueTable_isUndefined (s->state));
3150 s->state = context_createValueTable (s, stinfo);
3154 /*@dependent@*/ sRef sRef_makeCvar (int level, usymId index, ctype ct, /*@only@*/ stateInfo stinfo)
3156 return (sRef_makeCvarAux (level, index, ct, stinfo));
3159 int sRef_lexLevel (sRef s)
3161 if (sRef_isValid (s))
3165 conj = sRef_fixConj (s);
3166 s = sRef_getRootBase (conj);
3168 if (sRef_isValid (s) && s->kind == SK_CVAR)
3170 return (s->info->cvar->lexlevel);
3178 sRef_makeGlobal (usymId l, ctype ct, /*@only@*/ stateInfo stinfo)
3180 return (sRef_makeCvar (globScope, l, ct, stinfo));
3184 sRef_setParamNo (sRef s, int l)
3186 llassert (sRef_isValid (s) && s->kind == SK_PARAM);
3187 s->info->paramno = l;
3191 /*@dependent@*/ sRef
3192 sRef_makeParam (int l, ctype ct, stateInfo stinfo)
3194 sRef s = sRef_new ();
3199 s->info = (sinfo) dmalloc (sizeof (*s->info));
3200 s->info->paramno = l;
3202 s->defstate = SS_UNKNOWN;
3203 /* (probably defined, unless its an out parameter) */
3205 llassert (valueTable_isUndefined (s->state));
3206 s->state = context_createValueTable (s, stinfo);
3211 sRef_isIndexKnown (sRef arr)
3215 llassert (sRef_isValid (arr));
3216 arr = sRef_fixConj (arr);
3218 llassert (arr->kind == SK_ARRAYFETCH);
3219 res = arr->info->arrayfetch->indknown;
3224 sRef_getIndex (sRef arr)
3228 llassert (sRef_isValid (arr));
3229 arr = sRef_fixConj (arr);
3231 llassert (arr->kind == SK_ARRAYFETCH);
3233 if (!arr->info->arrayfetch->indknown)
3235 llcontbug (message ("sRef_getIndex: unknown: %q", sRef_unparse (arr)));
3240 result = arr->info->arrayfetch->ind;
3246 static bool sRef_isZerothArrayFetch (/*@notnull@*/ sRef s)
3248 return (s->kind == SK_ARRAYFETCH
3249 && s->info->arrayfetch->indknown
3250 && (s->info->arrayfetch->ind == 0));
3253 /*@exposed@*/ sRef sRef_makeAddress (/*@exposed@*/ sRef t)
3256 if (sRef_isInvalid (t)) return sRef_undefined;
3258 if (sRef_isPointer (t))
3260 return (t->info->ref);
3262 else if (sRef_isZerothArrayFetch (t))
3264 return (t->info->arrayfetch->arr);
3268 sRef s = sRef_newRef ();
3271 s->type = ctype_makePointer (t->type);
3272 s->info = (sinfo) dmalloc (sizeof (*s->info));
3273 s->info->ref = t; /* sRef_copy (t); */ /*@i32@*/
3275 if (t->defstate == SS_UNDEFINED)
3276 /* no! it is allocated even still: && !ctype_isPointer (t->type)) */
3278 s->defstate = SS_ALLOCATED;
3282 s->defstate = t->defstate;
3285 if (t->aliaskind == AK_LOCAL)
3287 if (sRef_isLocalVar (t))
3289 s->aliaskind = AK_STACK;
3293 llassert (valueTable_isUndefined (s->state));
3294 s->state = context_createValueTable (s, stateInfo_makeLoc (g_currentloc));
3299 cstring sRef_getField (sRef s)
3303 llassert (sRef_isValid (s));
3304 s = sRef_fixConj (s);
3306 llassertprint (sRef_isValid (s) && (s->kind == SK_FIELD),
3307 ("s = %s", sRef_unparseDebug (s)));
3309 res = s->info->field->field;
3313 sRef sRef_getBase (sRef s)
3317 if (sRef_isInvalid (s)) return (sRef_undefined);
3319 s = sRef_fixConj (s);
3330 res = s->info->field->rec;
3334 res = s->info->arrayfetch->arr;
3338 res = sRef_undefined; /* shouldn't need it */
3345 ** same as getBase, except returns invalid
3346 ** (and doesn't use adr's)
3350 sRef_getBaseSafe (sRef s)
3354 if (sRef_isInvalid (s)) { return sRef_undefined; }
3356 s = sRef_fixConj (s);
3364 res = s->info->field->rec; break;
3366 res = s->info->arrayfetch->arr;
3369 res = sRef_undefined; break;
3375 /*@constant int MAXBASEDEPTH;@*/
3376 # define MAXBASEDEPTH 25
3378 static /*@exposed@*/ sRef
3379 sRef_getRootBaseAux (sRef s, int depth)
3381 if (sRef_isInvalid (s)) return sRef_undefined;
3383 if (depth > MAXBASEDEPTH)
3386 ("Warning: reference base limit exceeded for %q. "
3387 "This either means there is a variable with at least "
3388 "%d indirections from this reference, or "
3389 "there is a bug in LCLint.",
3394 return sRef_undefined;
3401 return (sRef_getRootBaseAux (s->info->ref, depth + 1));
3403 return (sRef_getRootBaseAux (s->info->field->rec, depth + 1));
3405 return (sRef_getRootBaseAux (s->info->arrayfetch->arr, depth + 1));
3407 return (sRef_getRootBaseAux (sRef_fixConj (s), depth + 1));
3413 sRef sRef_getRootBase (sRef s)
3415 return (sRef_getRootBaseAux (s, 0));
3418 static bool sRef_isDeep (sRef s)
3420 if (sRef_isInvalid (s)) return FALSE;
3430 return (sRef_isDeep (sRef_fixConj (s)));
3436 static int sRef_depth (sRef s)
3438 if (sRef_isInvalid (s)) return 0;
3446 return 1 + sRef_depth (s->info->ref);
3448 return 1 + sRef_depth (s->info->field->rec);
3450 return 1 + sRef_depth (s->info->arrayfetch->arr);
3452 return (sRef_depth (sRef_fixConj (s)));
3459 sRef_makeObject (ctype o)
3461 sRef s = sRef_newRef (); /*@i423 same line is bad...@*/
3463 s->kind = SK_OBJECT;
3464 s->info = (sinfo) dmalloc (sizeof (*s->info));
3465 s->info->object = o;
3466 llassert (valueTable_isUndefined (s->state));
3467 s->state = context_createValueTable (s, stateInfo_makeLoc (g_currentloc));
3472 ** This is used to represent storage referenced by a parameter.
3475 sRef sRef_makeExternal (sRef t)
3477 sRef s = sRef_newRef ();
3479 llassert (sRef_isValid (t));
3481 s->kind = SK_EXTERNAL;
3482 s->info = (sinfo) dmalloc (sizeof (*s->info));
3484 s->info->ref = t; /* sRef_copy (t); */ /*@i32 was exposed@*/
3485 llassert (valueTable_isUndefined (s->state));
3486 s->state = context_createValueTable (s, stateInfo_makeLoc (g_currentloc));
3490 /*@dependent@*/ sRef sRef_makeDerived (/*@exposed@*/ sRef t)
3492 if (sRef_isValid (t))
3494 sRef s = sRef_newRef ();
3496 s->kind = SK_DERIVED;
3497 s->info = (sinfo) dmalloc (sizeof (*s->info));
3498 s->info->ref = t; /* sRef_copy (t); */ /*@i32@*/
3501 llassert (valueTable_isUndefined (s->state));
3502 s->state = context_createValueTable (s, stateInfo_makeLoc (g_currentloc));
3507 return sRef_undefined;
3512 ** definitely NOT symmetric:
3514 ** res fills in unknown state information from other
3518 sRef_mergeStateQuiet (sRef res, sRef other)
3520 llassert (sRef_isValid (res));
3521 llassert (sRef_isValid (other));
3523 res->modified = res->modified || other->modified;
3524 res->safe = res->safe && other->safe;
3526 if (res->defstate == SS_UNKNOWN)
3528 res->defstate = other->defstate;
3529 res->definfo = stateInfo_update (res->definfo, other->definfo);
3532 if (res->aliaskind == AK_UNKNOWN ||
3533 (res->aliaskind == AK_LOCAL && alkind_isKnown (other->aliaskind)))
3535 res->aliaskind = other->aliaskind;
3536 res->oaliaskind = other->oaliaskind;
3537 res->aliasinfo = stateInfo_update (res->aliasinfo, other->aliasinfo);
3540 if (res->expkind == XO_UNKNOWN)
3542 res->expkind = other->expkind;
3543 res->oexpkind = other->oexpkind;
3544 res->expinfo = stateInfo_update (res->expinfo, other->expinfo);
3547 /* out takes precedence over implicitly defined */
3548 if (res->defstate == SS_DEFINED && other->defstate != SS_UNKNOWN)
3550 res->defstate = other->defstate;
3551 res->definfo = stateInfo_update (res->definfo, other->definfo);
3554 if (sRef_getNullState (other) == NS_ERROR || sRef_getNullState (res) == NS_ERROR)
3556 sRef_setNullState (res, NS_ERROR, fileloc_undefined);
3560 if (sRef_getNullState (other) != NS_UNKNOWN
3561 && (sRef_getNullState (res) == NS_UNKNOWN || sRef_getNullState (res) == NS_NOTNULL
3562 || sRef_getNullState (res) == NS_MNOTNULL))
3564 sRef_updateNullState (res, other);
3570 ** definitely NOT symmetric:
3572 ** res fills in known state information from other
3576 sRef_mergeStateQuietReverse (/*@dependent@*/ sRef res, /*@dependent@*/ sRef other)
3578 bool changed = FALSE;
3580 llassert (sRef_isValid (res));
3581 llassert (sRef_isValid (other));
3582 sRef_checkMutable (res);
3584 if (res->kind != other->kind)
3590 res->kind = other->kind;
3591 res->type = other->type;
3592 res->info = sinfo_fullCopy (other);
3596 if (!ctype_equal (res->type, other->type))
3599 res->type = other->type;
3602 sinfo_update (res, other);
3605 res->modified = res->modified || other->modified;
3606 res->safe = res->safe && other->safe;
3608 if (res->aliaskind != other->aliaskind
3609 && (res->aliaskind == AK_UNKNOWN
3610 || ((res->aliaskind == AK_LOCAL
3611 || (res->aliaskind == AK_REFCOUNTED
3612 && other->aliaskind != AK_LOCAL))
3613 && other->aliaskind != AK_UNKNOWN)))
3616 res->aliaskind = other->aliaskind;
3617 res->oaliaskind = other->oaliaskind;
3618 res->aliasinfo = stateInfo_update (res->aliasinfo, other->aliasinfo);
3621 if (other->expkind != XO_UNKNOWN && other->expkind != res->expkind)
3624 res->expkind = other->expkind;
3625 res->expinfo = stateInfo_update (res->expinfo, other->expinfo);
3628 if (other->oexpkind != XO_UNKNOWN)
3630 res->oexpkind = other->oexpkind;
3633 /* out takes precedence over implicitly defined */
3635 if (res->defstate != other->defstate)
3637 if (other->defstate != SS_UNKNOWN)
3639 res->defstate = other->defstate;
3643 if (sRef_getNullState (other) == NS_ERROR || sRef_getNullState (res) == NS_ERROR)
3645 if (sRef_getNullState (res) != NS_ERROR)
3647 sRef_setNullStateN (res, NS_ERROR);
3653 if (sRef_getNullState (other) != NS_UNKNOWN && sRef_getNullState (other) != sRef_getNullState (res))
3656 sRef_updateNullState (res, other);
3662 sRef_clearDerived (res);
3667 sRef_mergeState (sRef res, sRef other, clause cl, fileloc loc)
3669 if (sRef_isValid (res) && sRef_isValid (other))
3671 sRef_mergeStateAux (res, other, cl, FALSE, loc, TRUE);
3675 if (sRef_isInvalid (res))
3677 llbug (message ("sRef_mergeState: invalid res sRef: %q",
3678 sRef_unparseDebug (other)));
3682 llbug (message ("sRef_mergeState: invalid other sRef: %q",
3683 sRef_unparseDebug (res)));
3689 sRef_mergeOptState (sRef res, sRef other, clause cl, fileloc loc)
3691 if (sRef_isValid (res) && sRef_isValid (other))
3693 sRef_mergeStateAux (res, other, cl, TRUE, loc, TRUE);
3697 if (sRef_isInvalid (res))
3699 llbug (message ("sRef_mergeOptState: invalid res sRef: %q",
3700 sRef_unparseDebug (other)));
3704 llbug (message ("sRef_mergeOptState: invalid other sRef: %q",
3705 sRef_unparseDebug (res)));
3711 sRef_mergeStateAux (/*@notnull@*/ sRef res, /*@notnull@*/ sRef other,
3712 clause cl, bool opt, fileloc loc,
3716 llassertfatal (sRef_isValid (res));
3717 llassertfatal (sRef_isValid (other));
3719 sRef_checkMutable (res);
3720 sRef_checkMutable (other);
3722 res->modified = res->modified || other->modified;
3724 if (res->kind == other->kind
3725 || (other->kind == SK_UNKNOWN || res->kind == SK_UNKNOWN))
3727 sstate odef = other->defstate;
3728 sstate rdef = res->defstate;
3729 nstate onull = sRef_getNullState (other);
3732 ** yucky stuff to handle
3737 if (other->defstate == SS_DEAD
3738 && ((sRef_isOnly (res) && sRef_definitelyNull (res))
3739 || (res->defstate == SS_UNDEFINED
3740 || res->defstate == SS_UNUSEABLE)))
3742 if (res->defstate == SS_UNDEFINED
3743 || res->defstate == SS_UNUSEABLE)
3745 res->defstate = SS_UNUSEABLE;
3749 res->defstate = SS_DEAD;
3752 res->definfo = stateInfo_update (res->definfo, other->definfo);
3753 sRef_clearDerived (other);
3754 sRef_clearDerived (res);
3756 else if (res->defstate == SS_DEAD
3757 && ((sRef_isOnly (other) && sRef_definitelyNull (other))
3758 || (other->defstate == SS_UNDEFINED
3759 || other->defstate == SS_UNUSEABLE)))
3761 if (other->defstate == SS_UNDEFINED
3762 || other->defstate == SS_UNUSEABLE)
3764 res->defstate = SS_UNUSEABLE;
3768 res->defstate = SS_DEAD;
3771 sRef_clearDerived (other);
3772 sRef_clearDerived (res);
3774 else if (res->defstate == SS_DEFINED
3775 && (other->defstate == SS_ALLOCATED
3776 && sRef_definitelyNull (other)))
3778 other->defstate = SS_DEFINED; /* definitely null! */
3780 else if (other->defstate == SS_DEFINED
3781 && (res->defstate == SS_ALLOCATED && sRef_definitelyNull (res)))
3783 res->defstate = SS_DEFINED;
3784 res->definfo = stateInfo_update (res->definfo, other->definfo);
3791 if (res->defstate == SS_DEAD && other->defstate == SS_DEAD)
3793 sRef_clearDerived (other);
3794 sRef_clearDerived (res);
3798 ** only & dead isn't really an only!
3801 if (alkind_isOnly (other->aliaskind) && other->defstate == SS_DEAD)
3803 other->aliaskind = AK_UNKNOWN;
3806 if (alkind_isOnly (res->aliaskind) && res->defstate == SS_DEAD)
3808 res->aliaskind = AK_UNKNOWN;
3812 ** Dead and dependent -> dead
3815 if (alkind_isDependent (other->aliaskind) && res->defstate == SS_DEAD)
3817 other->aliaskind = AK_UNKNOWN;
3818 other->defstate = SS_DEAD;
3819 sRef_clearDerived (res);
3820 sRef_clearDerived (other);
3823 if (alkind_isDependent (res->aliaskind) && other->defstate == SS_DEAD)
3825 res->aliaskind = AK_UNKNOWN;
3826 res->defstate = SS_DEAD;
3827 sRef_clearDerived (res);
3828 sRef_clearDerived (other);
3832 ** must do alias combine first, since it depends on
3833 ** original values of state and null.
3836 sRef_combineAliasKinds (res, other, cl, loc);
3837 sRef_combineDefState (res, other);
3838 sRef_combineNullState (res, other);
3840 if (rdef == SS_ALLOCATED || rdef == SS_SPECIAL)
3842 if (odef == SS_DEFINED)
3844 if (onull == NS_DEFNULL || onull == NS_CONSTNULL)
3846 res->deriv = sRefSet_copyInto (res->deriv, other->deriv);
3847 DPRINTF (("Copy derivs: %s", sRef_unparseFull (res)));
3850 else if (odef == SS_ALLOCATED || odef == SS_SPECIAL)
3855 if (ctype_isUnion (ctype_realType (sRef_getType (res))))
3857 res->deriv = sRef_mergeUnionDerivs (res->deriv,
3860 DPRINTF (("Copy derivs: %s", sRef_unparseFull (res)));
3864 res->deriv = sRef_mergeDerivs (res->deriv, other->deriv,
3866 DPRINTF (("Copy derivs: %s", sRef_unparseFull (res)));
3874 res->deriv = sRef_mergeDerivs (res->deriv, other->deriv,
3876 DPRINTF (("Copy derivs: %s", sRef_unparseFull (res)));
3886 if (rdef == SS_PDEFINED
3887 || (rdef == SS_DEFINED && odef == SS_PDEFINED))
3891 res->deriv = sRef_mergePdefinedDerivs (res->deriv, other->deriv,
3893 DPRINTF (("Copy derivs: %s", sRef_unparseFull (res)));
3898 if ((rdef == SS_DEFINED || rdef == SS_UNKNOWN)
3899 && res->defstate == SS_ALLOCATED)
3901 res->deriv = sRefSet_copyInto (res->deriv, other->deriv);
3907 res->deriv = sRef_mergeDerivs (res->deriv, other->deriv,
3909 DPRINTF (("Copy derivs: %s", sRef_unparseFull (res)));
3916 sRef_combineExKinds (res, other);
3920 if (res->kind == SK_ARRAYFETCH && other->kind == SK_PTR)
3922 sRef nother = sRef_buildArrayFetchKnown (sRef_getBase (other), 0);
3924 sRef_copyState (nother, other);
3925 sRef_mergeStateAux (res, nother, cl, opt, loc, doDerivs);
3927 else if (res->kind == SK_PTR && other->kind == SK_ARRAYFETCH)
3929 sRef nother = sRef_buildPointer (sRef_getBase (other));
3931 if (sRef_isValid (nother))
3933 sRef_copyState (nother, other);
3934 sRef_mergeStateAux (res, nother, cl, opt, loc, doDerivs);
3939 llcontbug (message ("merge conj: %q / %q", sRef_unparseFull (res),
3940 sRef_unparseFull (other)));
3946 ** Merge value table states
3953 ** This doesn't do anything. And its broken too...
3956 valueTable_elements (res->state, key, sv)
3958 stateValue os = valueTable_lookup (other->state, key);
3959 /*@unused@*/ int val;
3960 /*@unused@*/ char *msg;
3962 llassert (stateValue_isDefined (os));
3964 DPRINTF (("Merge state: %s / %s",
3965 cstring_toCharsSafe (stateValue_unparse (sv)),
3966 cstring_toCharsSafe (stateValue_unparse (os))));
3968 val = valueMatix_lookup (key,
3969 stateValue_getValue (os),
3970 stateValue_getValue (sv),
3972 DPRINTF (("Val: %d / %s", val, msg));
3974 } end_valueTable_elements ;
3980 sRef_mergeUnionDerivs (/*@only@*/ sRefSet res,
3981 /*@exposed@*/ sRefSet other, bool opt,
3982 clause cl, fileloc loc)
3984 if (sRefSet_isEmpty (res))
3986 return sRefSet_copyInto (res, other);
3990 sRefSet_allElements (other, el)
3992 if (sRef_isValid (el))
3994 sRef e2 = sRefSet_lookupMember (other, el);
3996 if (sRef_isValid (e2))
3998 sRef_mergeStateAux (el, e2, cl, opt, loc, FALSE);
4002 res = sRefSet_insert (res, el);
4005 } end_sRefSet_allElements ;
4011 static /*@only@*/ sRefSet
4012 sRef_mergeDerivs (/*@only@*/ sRefSet res, sRefSet other,
4013 bool opt, clause cl, fileloc loc)
4015 sRefSet ret = sRefSet_new ();
4017 sRefSet_allElements (res, el)
4019 if (sRef_isValid (el))
4021 sRef e2 = sRefSet_lookupMember (other, el);
4023 if (sRef_isValid (e2))
4025 if (el->defstate == SS_ALLOCATED &&
4026 e2->defstate == SS_PDEFINED)
4028 e2->defstate = SS_ALLOCATED;
4030 else if (e2->defstate == SS_ALLOCATED &&
4031 el->defstate == SS_PDEFINED)
4033 el->defstate = SS_ALLOCATED;
4034 sRef_clearDerived (el);
4036 else if ((el->defstate == SS_DEAD || sRef_isKept (el)) &&
4037 (e2->defstate == SS_DEFINED && !sRef_isKept (e2)))
4040 if (checkDeadState (el, TRUE, loc))
4042 if (sRef_isThroughArrayFetch (el))
4044 sRef_maybeKill (el, loc);
4045 sRef_maybeKill (e2, loc);
4049 else if ((e2->defstate == SS_DEAD || sRef_isKept (e2)) &&
4050 (el->defstate == SS_DEFINED && !sRef_isKept (el)))
4053 if (checkDeadState (e2, FALSE, loc))
4055 if (sRef_isThroughArrayFetch (el))
4057 sRef_maybeKill (el, loc);
4058 sRef_maybeKill (e2, loc);
4062 else if (el->defstate == SS_DEFINED &&
4063 e2->defstate == SS_PDEFINED)
4065 DPRINTF (("set pdefined: %s", sRef_unparseFull (el)));
4066 el->defstate = SS_PDEFINED;
4068 else if (e2->defstate == SS_DEFINED &&
4069 el->defstate == SS_PDEFINED)
4071 DPRINTF (("set pdefined: %s", sRef_unparseFull (e2)));
4072 e2->defstate = SS_PDEFINED;
4079 if (ctype_isUnion (ctype_realType (sRef_getType (el))))
4081 el->deriv = sRef_mergeUnionDerivs (el->deriv, e2->deriv,
4086 el->deriv = sRef_mergeDerivs (el->deriv, e2->deriv, opt, cl, loc);
4089 if (sRef_equivalent (el, e2))
4091 ret = sRefSet_insert (ret, el);
4095 sRef sr = sRef_leastCommon (el, e2);
4097 if (sRef_isValid (sr))
4099 ret = sRefSet_insert (ret, sr);
4107 (void) sRefSet_delete (other, e2);
4109 else /* not defined */
4111 (void) checkDeadState (el, TRUE, loc);
4114 } end_sRefSet_allElements;
4116 sRefSet_allElements (other, el)
4118 if (sRef_isValid (el))
4120 (void) checkDeadState (el, FALSE, loc);
4122 } end_sRefSet_allElements;
4129 ** Returns TRUE is there is an error.
4132 static bool checkDeadState (/*@notnull@*/ sRef el, bool tbranch, fileloc loc)
4135 ** usymtab_isGuarded --- the utab should still be in the
4136 ** state of the alternate branch.
4138 ** tbranch TRUE means el is released in the last branch, e.g.
4139 ** if (x != NULL) { ; } else { sfree (x); }
4140 ** so, if x is null in the other branch no error is reported.
4142 ** tbranch FALSE means this is the other branch:
4143 ** if (x != NULL) { sfree (x); } else { ; }
4144 ** so, if x is null in this branch there is no error.
4148 if ((sRef_isDead (el) || sRef_isKept (el))
4149 && !sRef_isDeepUnionField (el) && !sRef_isThroughArrayFetch (el))
4154 if (usymtab_isDefinitelyNullDeep (el))
4161 if (usymtab_isAltDefinitelyNullDeep (el))
4169 message ("Storage %q is %q in one path, but live in another.",
4171 cstring_makeLiteral (sRef_isKept (el)
4172 ? "kept" : "released")),
4176 if (sRef_isKept (el))
4178 sRef_showAliasInfo (el);
4182 sRef_showStateInfo (el);
4185 /* prevent further errors */
4186 el->defstate = SS_UNKNOWN;
4187 sRef_setAliasKind (el, AK_ERROR, fileloc_undefined);
4197 checkDerivDeadState (/*@notnull@*/ sRef el, bool tbranch, fileloc loc)
4200 if (checkDeadState (el, tbranch, loc))
4202 sRefSet_allElements (el->deriv, t)
4204 if (sRef_isValid (t))
4206 checkDerivDeadState (t, tbranch, loc);
4208 } end_sRefSet_allElements;
4213 sRef_mergePdefinedDerivs (sRefSet res, sRefSet other, bool opt,
4214 clause cl, fileloc loc)
4216 sRefSet ret = sRefSet_new ();
4218 sRefSet_allElements (res, el)
4220 if (sRef_isValid (el))
4222 sRef e2 = sRefSet_lookupMember (other, el);
4224 if (sRef_isValid (e2))
4226 if (sRef_isAllocated (el) && !sRef_isAllocated (e2))
4230 else if (sRef_isAllocated (e2) && !sRef_isAllocated (el))
4232 el->deriv = sRefSet_copyInto (el->deriv, e2->deriv);
4236 el->deriv = sRef_mergePdefinedDerivs (el->deriv, e2->deriv,
4240 sRef_mergeStateAux (el, e2, cl, opt, loc, FALSE);
4242 ret = sRefSet_insert (ret, el);
4243 (void) sRefSet_delete (other, e2);
4249 checkDerivDeadState (el, (cl == FALSECLAUSE), loc);
4252 ret = sRefSet_insert (ret, el);
4255 } end_sRefSet_allElements;
4257 sRefSet_allElements (other, el)
4259 if (sRef_isValid (el))
4261 if (!sRefSet_member (ret, el))
4263 /* was cl == FALSECLAUSE */
4264 checkDerivDeadState (el, FALSE, loc);
4265 ret = sRefSet_insert (ret, el);
4270 ** it's okay --- member is a different equality test
4274 } end_sRefSet_allElements;
4280 sRef sRef_makeConj (/*@exposed@*/ /*@returned@*/ sRef a, /*@exposed@*/ sRef b)
4282 llassert (sRef_isValid (a));
4283 llassert (sRef_isValid (b));
4285 if (!sRef_equivalent (a, b))
4287 sRef s = sRef_newRef ();
4290 s->info = (sinfo) dmalloc (sizeof (*s->info));
4291 s->info->conj = (cjinfo) dmalloc (sizeof (*s->info->conj));
4292 s->info->conj->a = a; /* sRef_copy (a) */ /*@i32*/ ;
4293 s->info->conj->b = b; /* sRef_copy (b);*/ /*@i32@*/ ;
4295 if (ctype_equal (a->type, b->type)) s->type = a->type;
4296 else s->type = ctype_makeConj (a->type, b->type);
4298 if (a->defstate == b->defstate)
4300 s->defstate = a->defstate;
4304 s->defstate = SS_UNKNOWN;
4307 sRef_setNullStateN (s, NS_UNKNOWN);
4309 s->safe = a->safe && b->safe;
4310 s->aliaskind = alkind_resolve (a->aliaskind, b->aliaskind);
4312 llassert (valueTable_isUndefined (s->state));
4313 s->state = context_createValueTable (s, stateInfo_makeLoc (g_currentloc));
4318 /*@-exposetrans@*/ return a; /*@=exposetrans@*/
4322 /*@dependent@*/ sRef
4325 sRef s = sRef_new ();
4327 s->kind = SK_UNKNOWN;
4331 static /*@owned@*/ sRef
4332 sRef_makeSpecial (speckind sk) /*@*/
4334 sRef s = sRef_new ();
4336 s->kind = SK_SPECIAL;
4337 s->info = (sinfo) dmalloc (sizeof (*s->info));
4339 /*@-dependenttrans@*/
4341 /*@=dependenttrans@*/
4344 static /*@owned@*/ sRef srnothing = sRef_undefined;
4345 static /*@owned@*/ sRef srinternal = sRef_undefined;
4346 static /*@owned@*/ sRef srsystem = sRef_undefined;
4347 static /*@owned@*/ sRef srspec = sRef_undefined;
4349 /*@dependent@*/ sRef
4350 sRef_makeNothing (void)
4352 if (sRef_isInvalid (srnothing))
4354 srnothing = sRef_makeSpecial (SR_NOTHING);
4361 sRef_makeInternalState (void)
4363 if (sRef_isInvalid (srinternal))
4365 srinternal = sRef_makeSpecial (SR_INTERNAL);
4372 sRef_makeSpecState (void)
4374 if (sRef_isInvalid (srspec))
4376 srspec = sRef_makeSpecial (SR_SPECSTATE);
4383 sRef_makeSystemState (void)
4385 if (sRef_isInvalid (srsystem))
4387 srsystem = sRef_makeSpecial (SR_SYSTEM);
4394 sRef_makeGlobalMarker (void)
4396 sRef s = sRef_makeSpecial (SR_GLOBALMARKER);
4397 llassert (valueTable_isUndefined (s->state));
4398 s->state = context_createGlobalMarkerValueTable (stateInfo_undefined);
4403 sRef_makeResult (ctype c)
4405 sRef s = sRef_newRef ();
4407 s->kind = SK_RESULT;
4409 s->defstate = SS_UNKNOWN;
4410 s->aliaskind = AK_UNKNOWN;
4411 sRef_setNullStateN (s, NS_UNKNOWN);
4412 llassert (valueTable_isUndefined (s->state));
4413 s->state = context_createValueTable (s, stateInfo_makeLoc (g_currentloc));
4415 DPRINTF (("Result: [%p] %s", s, sRef_unparseFull (s)));
4421 sRef_isNothing (sRef s)
4423 return (sRef_isKindSpecial (s) && s->info->spec == SR_NOTHING);
4427 sRef_isInternalState (sRef s)
4429 return (sRef_isKindSpecial (s) && s->info->spec == SR_INTERNAL);
4433 sRef_isSpecInternalState (sRef s)
4435 return (sRef_isKindSpecial (s)
4436 && (s->info->spec == SR_INTERNAL || s->info->spec == SR_SPECSTATE));
4440 sRef_isSpecState (sRef s)
4442 return (sRef_isKindSpecial (s) && s->info->spec == SR_SPECSTATE);
4446 sRef_isResult (sRef s)
4448 return (sRef_isValid (s) && s->kind == SK_RESULT);
4452 sRef_isSystemState (sRef s)
4454 return (sRef_isKindSpecial (s) && s->info->spec == SR_SYSTEM);
4458 sRef_isGlobalMarker (sRef s)
4460 return (sRef_isKindSpecial (s) && s->info->spec == SR_GLOBALMARKER);
4464 sRef_getScopeIndex (sRef s)
4466 llassert (sRef_isValid (s));
4467 llassert (sRef_isCvar (s));
4469 return (s->info->cvar->index);
4473 sRef_makeSafe (sRef s)
4475 if (sRef_isValid (s))
4482 sRef_makeUnsafe (sRef s)
4484 if (sRef_isValid (s))
4491 ** memory state operations
4494 /*@only@*/ cstring sRef_unparseFull (sRef s)
4496 if (sRef_isInvalid (s)) return (cstring_undefined);
4498 return (message ("[%d] %q - %q [%s] { %q } < %q >",
4500 sRef_unparseDebug (s),
4501 sRef_unparseState (s),
4502 exkind_unparse (s->oexpkind),
4503 sRefSet_unparseDebug (s->deriv),
4504 valueTable_unparse (s->state)));
4507 /*@unused@*/ cstring sRef_unparseDeep (sRef s)
4509 cstring st = cstring_undefined;
4511 st = message ("%q:", sRef_unparseFull (s));
4513 if (sRef_isValid (s))
4515 sRefSet_allElements (s->deriv, el)
4517 st = message("%q\n%q", st, sRef_unparseDeep (el));
4518 } end_sRefSet_allElements ;
4524 /*@only@*/ cstring sRef_unparseState (sRef s)
4526 if (sRef_isConj (s))
4528 return (message ("%q | %q",
4529 sRef_unparseState (s->info->conj->a),
4530 sRef_unparseState (s->info->conj->b)));
4533 if (sRef_isInvalid (s))
4535 return (cstring_makeLiteral ("<invalid>"));
4538 return (message ("%s.%s.%s.%s",
4539 alkind_unparse (s->aliaskind),
4540 nstate_unparse (sRef_getNullState (s)),
4541 exkind_unparse (s->expkind),
4542 sstate_unparse (s->defstate)));
4545 bool sRef_isNotUndefined (sRef s)
4547 return (sRef_isInvalid (s)
4548 || (s->defstate != SS_UNDEFINED
4549 && s->defstate != SS_UNUSEABLE
4550 && s->defstate != SS_DEAD));
4553 ynm sRef_isWriteable (sRef s)
4555 if (sRef_isInvalid (s)) return MAYBE;
4557 if (sRef_isConj (s) && s->defstate == SS_UNKNOWN)
4559 if (ynm_toBoolStrict (sRef_isWriteable (sRef_getConjA (s))))
4561 if (ynm_toBoolStrict (sRef_isWriteable (sRef_getConjB (s))))
4569 if (ynm_toBoolStrict (sRef_isWriteable (sRef_getConjB (s))))
4577 return (ynm_fromBool (s->defstate != SS_UNUSEABLE));
4580 bool sRef_hasNoStorage (sRef s)
4582 return (!sRef_isAllocatedStorage (s) || sRef_isDefinitelyNull (s));
4585 bool sRef_isStrictReadable (sRef s)
4587 return (ynm_toBoolStrict (sRef_isReadable (s)));
4590 ynm sRef_isReadable (sRef s)
4594 if (sRef_isInvalid (s)) return YES;
4598 if (sRef_isConj (s) && s->defstate == SS_UNKNOWN)
4600 if (ynm_toBoolStrict (sRef_isReadable (sRef_getConjA (s))))
4602 if (ynm_toBoolStrict (sRef_isReadable (sRef_getConjB (s))))
4610 if (ynm_toBoolStrict (sRef_isReadable (sRef_getConjB (s))))
4617 else if (ss == SS_HOFFA)
4619 if (context_getFlag (FLG_STRICTUSERELEASED))
4630 return (ynm_fromBool (ss == SS_DEFINED
4633 || ss == SS_PDEFINED
4636 || ss == SS_ALLOCATED
4637 || ss == SS_KILLED /* evans 2001-05-26: added this for killed globals */
4638 || ss == SS_UNKNOWN));
4642 static /*@exposed@*/ sRef whatUndefined (/*@exposed@*/ sRef fref, int depth)
4647 if (depth > MAXDEPTH)
4650 ("Warning: check definition limit exceeded, checking %q. "
4651 "This either means there is a variable with at least "
4652 "%d indirections apparent in the program text, or "
4653 "there is a bug in LCLint.",
4654 sRef_unparse (fref),
4658 return sRef_undefined;
4661 if (!sRef_isKnown (fref) || sRef_isAnyDefined (fref))
4663 return sRef_undefined;
4666 if (sRef_isUnuseable (fref) || sRef_isStateUndefined (fref))
4671 ct = ctype_realType (sRef_getType (fref));
4673 if (ctype_isUnknown (ct))
4675 return sRef_undefined;
4677 else if (ctype_isPointer (ct) || ctype_isArray (ct))
4679 if (sRef_isStateUnknown (fref))
4681 return sRef_undefined;
4685 sRef fptr = sRef_constructDeref (fref);
4687 return (whatUndefined (fptr, depth + 1));
4690 else if (ctype_isStruct (ct))
4692 bool hasOneDefined = FALSE;
4694 if (sRef_isStateUnknown (fref))
4699 if (sRef_isPdefined (fref) || sRef_isAnyDefined (fref))
4701 sRefSet_realElements (sRef_derivedFields (fref), sr)
4703 hasOneDefined = TRUE;
4705 if (sRef_isField (sr))
4707 cstring fieldname = sRef_getField (sr);
4708 sRef fldref = sRef_makeField (fref, fieldname);
4709 bool shouldCheck = !sRef_isRecursiveField (fldref);
4713 sRef wdef = whatUndefined (fldref, depth + 1);
4715 if (sRef_isValid (wdef))
4721 } end_sRefSet_realElements;
4723 else if (sRef_isAllocated (fref))
4726 ** for structures, each field must be completely defined
4729 uentryList fields = ctype_getFields (ct);
4731 uentryList_elements (fields, ue)
4733 cstring name = uentry_getRealName (ue);
4734 sRef ffield = sRef_makeField (fref, name);
4735 bool shouldCheck = !sRef_isRecursiveField (ffield);
4737 if (sRef_isRelDef (uentry_getSref (ue)))
4745 sRef wdef = whatUndefined (ffield, depth + 1);
4747 if (sRef_isInvalid (wdef))
4753 } end_uentryList_elements;
4760 else if (ctype_isUnion (ct))
4769 return sRef_undefined;
4772 static bool checkDefined (/*@temp@*/ sRef sr)
4774 /*@-temptrans@*/ /* the result from whatUndefined is lost */
4775 return (sRef_isInvalid (whatUndefined (sr, 0)));
4779 bool sRef_isReallyDefined (sRef s)
4781 if (sRef_isValid (s))
4783 if (sRef_isAnyDefined (s))
4789 if (sRef_isAllocated (s) || sRef_isPdefined (s))
4791 return checkDefined (s);
4805 void sRef_showNotReallyDefined (sRef s)
4807 if (sRef_isValid (s))
4809 if (sRef_isAnyDefined (s))
4815 if (sRef_isAllocated (s) || sRef_isPdefined (s))
4817 /*@-temptrans@*/ /* the result of whatUndefined is lost */
4818 sRef ref = whatUndefined (s, 0);
4820 llassert (sRef_isValid (ref));
4825 (message ("This sub-reference is %s: %q",
4826 sstate_unparse (sRef_getDefState (ref)),
4827 sRef_unparse (ref)));
4842 sstate sRef_getDefState (sRef s)
4844 if (sRef_isInvalid (s)) return (SS_UNKNOWN);
4845 return (s->defstate);
4848 void sRef_setDefState (sRef s, sstate defstate, fileloc loc)
4850 sRef_checkMutable (s);
4851 sRef_setStateAux (s, defstate, loc);
4854 static void sRef_clearAliasStateAux (sRef s, fileloc loc)
4856 sRef_checkMutable (s);
4857 sRef_setAliasKind (s, AK_ERROR, loc);
4860 void sRef_clearAliasState (sRef s, fileloc loc)
4862 sRef_checkMutable (s);
4863 sRef_aliasSetComplete (sRef_clearAliasStateAux, s, loc);
4866 void sRef_setAliasKindComplete (sRef s, alkind kind, fileloc loc)
4868 sRef_checkMutable (s);
4869 sRef_aliasSetCompleteParam (sRef_setAliasKind, s, kind, loc);
4872 void sRef_setAliasKind (sRef s, alkind kind, fileloc loc)
4874 sRef_checkMutable (s);
4876 if (sRef_isValid (s))
4878 sRef_clearDerived (s);
4880 if ((kind != s->aliaskind && kind != s->oaliaskind)
4881 && fileloc_isDefined (loc))
4883 s->aliasinfo = stateInfo_updateLoc (s->aliasinfo, loc);
4886 s->aliaskind = kind;
4890 void sRef_setOrigAliasKind (sRef s, alkind kind)
4892 sRef_checkMutable (s);
4894 if (sRef_isValid (s))
4896 s->oaliaskind = kind;
4900 exkind sRef_getExKind (sRef s)
4902 if (sRef_isValid (s))
4904 return (s->expkind);
4912 exkind sRef_getOrigExKind (sRef s)
4914 if (sRef_isValid (s))
4916 return (s->oexpkind);
4924 static void sRef_clearExKindAux (sRef s, fileloc loc)
4926 sRef_checkMutable (s);
4927 sRef_setExKind (s, XO_UNKNOWN, loc);
4930 void sRef_setObserver (sRef s, fileloc loc)
4932 sRef_checkMutable (s);
4933 sRef_setExKind (s, XO_OBSERVER, loc);
4936 void sRef_setExposed (sRef s, fileloc loc)
4938 sRef_checkMutable (s);
4939 sRef_setExKind (s, XO_EXPOSED, loc);
4942 void sRef_clearExKindComplete (sRef s, fileloc loc)
4944 (void) sRef_aliasSetComplete (sRef_clearExKindAux, s, loc);
4947 void sRef_setExKind (sRef s, exkind exp, fileloc loc)
4949 sRef_checkMutable (s);
4951 if (sRef_isValid (s))
4953 if (s->expkind != exp)
4955 s->expinfo = stateInfo_updateLoc (s->expinfo, loc);
4963 ** s1->derived = s2->derived
4966 static void sRef_copyRealDerived (sRef s1, sRef s2)
4968 DPRINTF (("Copy real: %s / %s", sRef_unparse (s1), sRef_unparse (s2)));
4969 sRef_checkMutable (s1);
4971 if (sRef_isValid (s1) && sRef_isValid (s2))
4973 sRef sb = sRef_getRootBase (s1);
4975 sRefSet_clear (s1->deriv);
4977 sRefSet_allElements (s2->deriv, el)
4979 if (sRef_isValid (el))
4981 sRef rb = sRef_getRootBase (el);
4983 if (!sRef_same (rb, sb))
4985 sRef fb = sRef_fixDirectBase (el, s1);
4987 if (sRef_isValid (fb))
4989 sRef_copyRealDerived (fb, el);
4990 sRef_addDeriv (s1, fb);
4995 sRef_addDeriv (s1, el);
4998 } end_sRefSet_allElements ;
5003 void sRef_copyRealDerivedComplete (sRef s1, sRef s2)
5005 sRef_innerAliasSetCompleteParam (sRef_copyRealDerived, s1, s2);
5008 void sRef_setUndefined (sRef s, fileloc loc)
5010 sRef_checkMutable (s);
5012 if (sRef_isValid (s))
5014 s->defstate = SS_UNDEFINED;
5016 if (fileloc_isDefined (loc))
5018 s->definfo = stateInfo_updateLoc (s->definfo, loc);
5021 sRef_clearDerived (s);
5025 static void sRef_setDefinedAux (sRef s, fileloc loc, bool clear)
5027 sRef_checkMutable (s);
5028 if (sRef_isInvalid (s)) return;
5030 DPRINTF (("Set defined: %s", sRef_unparseFull (s)));
5032 if (s->defstate != SS_DEFINED && fileloc_isDefined (loc))
5034 s->definfo = stateInfo_updateLoc (s->definfo, loc);
5037 s->defstate = SS_DEFINED;
5039 DPRINTF (("Set defined: %s", sRef_unparseFull (s)));
5041 /* e.g., if x is allocated, *x = 3 defines x */
5043 if (s->kind == SK_PTR)
5045 sRef p = s->info->ref;
5048 if (p->defstate == SS_ALLOCATED
5049 || p->defstate == SS_SPECIAL) /* evans 2001-07-12: shouldn't need this */
5051 sRef_setDefinedAux (p, loc, clear);
5055 ** Defines a[0] also:
5058 arr = sRef_findDerivedArrayFetch (p, FALSE, 0, FALSE);
5060 if (sRef_isValid (arr))
5062 sRef_setDefinedAux (arr, loc, clear);
5065 else if (s->kind == SK_ARRAYFETCH)
5067 if (!s->info->arrayfetch->indknown
5068 || (s->info->arrayfetch->ind == 0))
5070 sRef p = s->info->arrayfetch->arr;
5071 sRef ptr = sRef_constructPointer (p);
5073 if (sRef_isValid (ptr))
5075 if (ptr->defstate == SS_ALLOCATED
5076 || ptr->defstate == SS_UNDEFINED
5077 || ptr->defstate == SS_SPECIAL) /* evans 2001-07-12: shouldn't need this */
5079 sRef_setDefinedAux (ptr, loc, clear);
5083 if (p->defstate == SS_RELDEF)
5087 else if (p->defstate == SS_ALLOCATED || p->defstate == SS_PDEFINED
5088 || p->defstate == SS_SPECIAL) /* evans 2001-07-12: shouldn't need this */
5090 p->defstate = SS_DEFINED;
5097 else if (s->kind == SK_FIELD)
5099 sRef parent = s->info->field->rec;
5101 if (sRef_isValid (parent))
5103 if (ctype_isUnion (ctype_realType (parent->type)))
5106 ** Should not clear derived from here.
5109 sRef_setDefinedNoClear (parent, loc);
5113 ; /* Nothing to do for structures. */
5125 sRef_clearDerived (s);
5129 /* evans 2001-07-12: need to define the derived references */
5130 sRefSet_elements (s->deriv, el)
5132 el->defstate = SS_DEFINED;
5133 } end_sRefSet_elements ;
5136 DPRINTF (("Set defined: %s", sRef_unparseFull (s)));
5139 static void sRef_setPartialDefined (sRef s, fileloc loc)
5141 sRef_checkMutable (s);
5143 if (!sRef_isPartial (s))
5145 sRef_setDefined (s, loc);
5149 void sRef_setPartialDefinedComplete (sRef s, fileloc loc)
5151 sRef_innerAliasSetComplete (sRef_setPartialDefined, s, loc);
5154 void sRef_setDefinedComplete (sRef s, fileloc loc)
5156 DPRINTF (("Set defined complete: %s", sRef_unparseFull (s)));
5157 sRef_innerAliasSetComplete (sRef_setDefined, s, loc);
5160 void sRef_setDefined (sRef s, fileloc loc)
5162 sRef_checkMutable (s);
5163 sRef_setDefinedAux (s, loc, TRUE);
5166 static void sRef_setDefinedNoClear (sRef s, fileloc loc)
5168 sRef_checkMutable (s);
5169 DPRINTF (("Defining: %s", sRef_unparseFull (s)));
5170 sRef_setDefinedAux (s, loc, FALSE);
5171 DPRINTF (("==> %s", sRef_unparseFull (s)));
5174 void sRef_setDefinedNCComplete (sRef s, fileloc loc)
5176 sRef_checkMutable (s);
5177 DPRINTF (("Set Defined Complete: %s", sRef_unparseFull (s)));
5178 sRef_innerAliasSetComplete (sRef_setDefinedNoClear, s, loc);
5179 DPRINTF (("==> %s", sRef_unparseFull (s)));
5182 static bool sRef_isDeepUnionField (sRef s)
5184 return (sRef_deepPred (sRef_isUnionField, s));
5187 bool sRef_isUnionField (sRef s)
5189 if (sRef_isValid (s) && s->kind == SK_FIELD)
5192 ** defining one field of a union defines the union
5195 sRef base = s->info->field->rec;
5197 if (sRef_isValid (base))
5199 return (ctype_isUnion (ctype_realType (base->type)));
5206 void sRef_setPdefined (sRef s, fileloc loc)
5208 sRef_checkMutable (s);
5209 if (sRef_isValid (s) && !sRef_isPartial (s))
5211 sRef base = sRef_getBaseSafe (s);
5213 if (s->defstate == SS_ALLOCATED)
5218 if (s->defstate != SS_PDEFINED && fileloc_isDefined (loc))
5220 s->definfo = stateInfo_updateLoc (s->definfo, loc);
5223 DPRINTF (("set pdefined: %s", sRef_unparseFull (s)));
5224 s->defstate = SS_PDEFINED;
5226 /* e.g., if x is allocated, *x = 3 defines x */
5228 while (sRef_isValid (base) && sRef_isKnown (base))
5230 if (base->defstate == SS_DEFINED)
5234 base->defstate = SS_PDEFINED;
5235 nb = sRef_getBaseSafe (base);
5246 static void sRef_setStateAux (sRef s, sstate ss, fileloc loc)
5248 sRef_checkMutable (s);
5250 if (sRef_isValid (s))
5252 /* if (s->defstate == SS_RELDEF) return; */
5254 if (s->defstate != ss && fileloc_isDefined (loc))
5256 s->definfo = stateInfo_updateLoc (s->definfo, loc);
5260 sRef_clearDerived (s);
5262 if (ss == SS_ALLOCATED)
5264 sRef base = sRef_getBaseSafe (s);
5266 while (sRef_isValid (base) && sRef_isKnown (base))
5268 if (base->defstate == SS_DEFINED)
5272 base->defstate = SS_PDEFINED;
5274 nb = sRef_getBaseSafe (base);
5287 void sRef_setAllocatedComplete (sRef s, fileloc loc)
5289 sRef_innerAliasSetComplete (sRef_setAllocated, s, loc);
5292 static void sRef_setAllocatedShallow (sRef s, fileloc loc)
5294 sRef_checkMutable (s);
5296 if (sRef_isValid (s))
5298 if (s->defstate == SS_DEAD || s->defstate == SS_UNDEFINED)
5300 s->defstate = SS_ALLOCATED;
5302 if (fileloc_isDefined (loc))
5304 s->definfo = stateInfo_updateLoc (s->definfo, loc);
5310 void sRef_setAllocatedShallowComplete (sRef s, fileloc loc)
5312 sRef_innerAliasSetComplete (sRef_setAllocatedShallow, s, loc);
5315 void sRef_setAllocated (sRef s, fileloc loc)
5317 sRef_checkMutable (s);
5318 sRef_setStateAux (s, SS_ALLOCATED, loc);
5321 void sRef_setPartial (sRef s, fileloc loc)
5323 sRef_checkMutable (s);
5324 sRef_setStateAux (s, SS_PARTIAL, loc);
5327 void sRef_setShared (sRef s, fileloc loc)
5329 sRef_checkMutable (s);
5331 if (sRef_isValid (s))
5333 if (s->aliaskind != AK_SHARED && fileloc_isDefined (loc))
5335 s->aliasinfo = stateInfo_updateLoc (s->aliasinfo, loc);
5338 s->aliaskind = AK_SHARED;
5339 /* don't! sRef_clearDerived (s); */
5343 void sRef_setLastReference (sRef s, /*@exposed@*/ sRef ref, fileloc loc)
5345 sRef_checkMutable (s);
5347 if (sRef_isValid (s))
5349 s->aliaskind = sRef_getAliasKind (ref);
5350 s->aliasinfo = stateInfo_updateRefLoc (s->aliasinfo, ref, loc);
5355 void sRef_setNullStateAux (/*@notnull@*/ sRef s, nstate ns, fileloc loc)
5357 DPRINTF (("Set null state: %s / %s", sRef_unparse (s), nstate_unparse (ns)));
5358 sRef_checkMutable (s);
5361 if (fileloc_isDefined (loc))
5363 s->nullinfo = stateInfo_updateLoc (s->nullinfo, loc);
5367 void sRef_setNotNull (sRef s, fileloc loc)
5369 if (sRef_isValid (s))
5371 sRef_setNullStateAux (s, NS_NOTNULL, loc);
5375 void sRef_setNullStateN (sRef s, nstate n)
5377 sRef_checkMutable (s);
5381 void sRef_setNullState (sRef s, nstate n, fileloc loc)
5383 if (sRef_isValid (s))
5385 sRef_setNullStateAux (s, n, loc);
5389 void sRef_setNullTerminatedStateInnerComplete (sRef s, struct s_bbufinfo b, /*@unused@*/ fileloc loc) {
5391 switch (b.bufstate) {
5392 case BB_NULLTERMINATED:
5393 sRef_setNullTerminatedState (s);
5394 sRef_setLen (s, b.len);
5396 case BB_POSSIBLYNULLTERMINATED:
5397 sRef_setPossiblyNullTerminatedState(s);
5399 case BB_NOTNULLTERMINATED:
5400 sRef_setNotNullTerminatedState (s);
5403 sRef_setSize (s, b.size);
5405 /* PL: TO BE DONE : Aliases are not modified right now, have to be similar to
5406 * setNullStateInnerComplete.
5410 void sRef_setNullStateInnerComplete (sRef s, nstate n, fileloc loc)
5412 DPRINTF (("Set null state: %s", nstate_unparse (n)));
5414 sRef_setNullState (s, n, loc);
5419 sRef_innerAliasSetComplete (sRef_setPosNull, s, loc);
5422 sRef_innerAliasSetComplete (sRef_setDefNull, s, loc);
5425 sRef_innerAliasSetComplete (sRef_setNullUnknown, s, loc);
5428 sRef_innerAliasSetComplete (sRef_setNotNull, s, loc);
5431 sRef_innerAliasSetComplete (sRef_setNotNull, s, loc);
5434 sRef_innerAliasSetComplete (sRef_setNullUnknown, s, loc);
5437 sRef_innerAliasSetComplete (sRef_setDefNull, s, loc);
5440 sRef_innerAliasSetComplete (sRef_setNullUnknown, s, loc);
5443 sRef_innerAliasSetComplete (sRef_setNullErrorLoc, s, loc);
5448 void sRef_setPosNull (sRef s, fileloc loc)
5450 if (sRef_isValid (s))
5452 sRef_setNullStateAux (s, NS_POSNULL, loc);
5456 void sRef_setDefNull (sRef s, fileloc loc)
5458 if (sRef_isValid (s))
5460 sRef_setNullStateAux (s, NS_DEFNULL, loc);
5464 void sRef_setNullUnknown (sRef s, fileloc loc)
5466 if (sRef_isValid (s))
5468 sRef_setNullStateAux (s, NS_UNKNOWN, loc);
5472 void sRef_setNullError (sRef s)
5474 if (sRef_isValid (s))
5476 sRef_setNullStateAux (s, NS_UNKNOWN, fileloc_undefined);
5480 void sRef_setNullErrorLoc (sRef s, /*@unused@*/ fileloc loc)
5482 sRef_setNullError (s);
5485 void sRef_setOnly (sRef s, fileloc loc)
5487 sRef_checkMutable (s);
5489 if (sRef_isValid (s) && s->aliaskind != AK_ONLY)
5491 s->aliaskind = AK_ONLY;
5492 s->aliasinfo = stateInfo_updateLoc (s->aliasinfo, loc);
5496 void sRef_setDependent (sRef s, fileloc loc)
5498 sRef_checkMutable (s);
5500 if (sRef_isValid (s) && !sRef_isConst (s) && (s->aliaskind != AK_DEPENDENT))
5502 DPRINTF (("Setting dependent: %s", sRef_unparseFull (s)));
5503 s->aliaskind = AK_DEPENDENT;
5504 s->aliasinfo = stateInfo_updateLoc (s->aliasinfo, loc);
5508 void sRef_setOwned (sRef s, fileloc loc)
5510 sRef_checkMutable (s);
5512 if (sRef_isValid (s) && !sRef_isConst (s) && (s->aliaskind != AK_OWNED))
5514 s->aliaskind = AK_OWNED;
5515 s->aliasinfo = stateInfo_updateLoc (s->aliasinfo, loc);
5519 void sRef_setKept (sRef s, fileloc loc)
5521 sRef_checkMutable (s);
5523 if (sRef_isValid (s) && !sRef_isConst (s) && (s->aliaskind != AK_KEPT))
5525 sRef base = sRef_getBaseSafe (s);
5527 while (sRef_isValid (base) && sRef_isKnown (base))
5529 if (base->defstate == SS_DEFINED)
5531 base->defstate = SS_PDEFINED;
5532 base = sRef_getBaseSafe (base);
5541 s->aliaskind = AK_KEPT;
5542 s->aliasinfo = stateInfo_updateLoc (s->aliasinfo, loc);
5546 static void sRef_setKeptAux (sRef s, fileloc loc)
5548 if (!sRef_isShared (s))
5550 sRef_setKept (s, loc);
5554 static void sRef_setDependentAux (sRef s, fileloc loc)
5556 if (!sRef_isShared (s))
5558 sRef_setDependent (s, loc);
5562 void sRef_setKeptComplete (sRef s, fileloc loc)
5564 sRef_aliasSetComplete (sRef_setKeptAux, s, loc);
5567 void sRef_setDependentComplete (sRef s, fileloc loc)
5569 sRef_aliasSetComplete (sRef_setDependentAux, s, loc);
5572 void sRef_setFresh (sRef s, fileloc loc)
5574 sRef_checkMutable (s);
5576 if (sRef_isValid (s))
5578 s->aliaskind = AK_FRESH;
5579 s->aliasinfo = stateInfo_updateLoc (s->aliasinfo, loc);
5583 void sRef_kill (sRef s, fileloc loc)
5585 DPRINTF (("Kill: %s", sRef_unparseFull (s)));
5586 sRef_checkMutable (s);
5588 if (sRef_isValid (s) && !sRef_isShared (s) && !sRef_isConst (s))
5590 sRef base = sRef_getBaseSafe (s);
5592 while (sRef_isValid (base) && sRef_isKnown (base))
5594 if (base->defstate == SS_DEFINED)
5596 base->defstate = SS_PDEFINED;
5597 base = sRef_getBaseSafe (base);
5605 s->aliaskind = s->oaliaskind;
5606 s->defstate = SS_DEAD;
5607 s->definfo = stateInfo_updateLoc (s->definfo, loc);
5609 sRef_clearDerived (s);
5613 void sRef_maybeKill (sRef s, fileloc loc)
5615 sRef_checkMutable (s);
5617 if (sRef_isValid (s))
5619 sRef base = sRef_getBaseSafe (s);
5622 while (sRef_isValid (base) && sRef_isKnown (base))
5624 if (base->defstate == SS_DEFINED || base->defstate == SS_RELDEF)
5626 base->defstate = SS_PDEFINED;
5627 base = sRef_getBaseSafe (base);
5636 s->aliaskind = s->oaliaskind;
5637 s->defstate = SS_HOFFA;
5638 s->definfo = stateInfo_updateLoc (s->definfo, loc);
5639 sRef_clearDerived (s);
5645 ** just for type checking...
5648 static void sRef_killAux (sRef s, fileloc loc)
5650 if (sRef_isValid (s) && !sRef_isShared (s))
5652 if (sRef_isUnknownArrayFetch (s))
5654 sRef_maybeKill (s, loc);
5664 ** kills s and all aliases to s
5667 void sRef_killComplete (sRef s, fileloc loc)
5669 DPRINTF (("Kill complete: %s", sRef_unparseFull (s)));
5670 sRef_aliasSetComplete (sRef_killAux, s, loc);
5673 static bool sRef_equivalent (sRef s1, sRef s2)
5675 return (sRef_compare (s1, s2) == 0);
5679 ** returns an sRef that will not be free'd on function exit.
5682 /*@only@*/ sRef sRef_saveCopy (sRef s)
5686 if (sRef_isValid (s))
5688 bool old = inFunction;
5691 ** Exit the function scope, so this sRef is not
5692 ** stored in the deallocation table.
5696 DPRINTF (("Copying sref: %s", sRef_unparseFull(s)));
5697 ret = sRef_copy (s);
5698 DPRINTF (("Copying ===>: %s", sRef_unparseFull(ret)));
5703 ret = sRef_undefined;
5706 /*@-dependenttrans@*/
5708 /*@=dependenttrans@*/
5711 sRef sRef_copy (sRef s)
5713 if (sRef_isKindSpecial (s) && !sRef_isGlobalMarker (s))
5716 return s; /* don't copy specials (except for global markers) */
5720 if (sRef_isValid (s))
5722 sRef t = sRef_alloc ();
5724 DPRINTF (("Copying: [%p] %s", s, sRef_unparse (s)));
5725 DPRINTF (("Full: %s", sRef_unparseFull (s)));
5729 t->modified = s->modified;
5730 t->immut = FALSE; /* Note mutability is not copied. */
5732 t->val = multiVal_copy (s->val);
5734 t->info = sinfo_copy (s);
5735 t->defstate = s->defstate;
5736 t->nullstate = s->nullstate;
5738 /* start modifications */
5739 t->bufinfo.bufstate = s->bufinfo.bufstate;
5740 t->bufinfo.len = s->bufinfo.len;
5741 t->bufinfo.size = s->bufinfo.size;
5742 /* end modifications */
5744 t->aliaskind = s->aliaskind;
5745 t->oaliaskind = s->oaliaskind;
5747 t->expkind = s->expkind;
5748 t->oexpkind = s->oexpkind;
5750 t->nullinfo = stateInfo_copy (s->nullinfo);
5751 t->aliasinfo = stateInfo_copy (s->aliasinfo);
5752 t->definfo = stateInfo_copy (s->definfo);
5753 t->expinfo = stateInfo_copy (s->expinfo);
5755 t->deriv = sRefSet_newDeepCopy (s->deriv);
5756 t->state = valueTable_copy (s->state);
5758 DPRINTF (("Made copy: [%p] %s", t, sRef_unparse (t)));
5763 return sRef_undefined;
5768 # define PREDTEST(func,s) \
5769 do { if (sRef_isInvalid (s)) { return FALSE; } \
5770 else { if (sRef_isConj (s)) \
5771 { return (func (sRef_getConjA (s)) \
5772 || func (sRef_getConjB (s))); }}} while (FALSE);
5774 bool sRef_isAddress (sRef s)
5776 PREDTEST (sRef_isAddress, s);
5777 return (s->kind == SK_ADR);
5781 ** pretty weak... maybe a flag should control this.
5784 bool sRef_isThroughArrayFetch (sRef s)
5786 if (sRef_isValid (s))
5794 if (sRef_isArrayFetch (tref))
5799 lt = sRef_getBase (tref);
5801 } while (sRef_isValid (tref));
5807 bool sRef_isArrayFetch (sRef s)
5809 PREDTEST (sRef_isArrayFetch, s);
5810 return (s->kind == SK_ARRAYFETCH);
5813 bool sRef_isMacroParamRef (sRef s)
5815 if (context_inMacro () && sRef_isCvar (s))
5817 uentry ue = sRef_getUentry (s);
5818 cstring pname = makeParam (uentry_rawName (ue));
5819 uentry mac = usymtab_lookupSafe (pname);
5821 cstring_free (pname);
5822 return (uentry_isValid (mac));
5828 bool sRef_isCvar (sRef s)
5830 PREDTEST (sRef_isCvar, s);
5831 return (s->kind == SK_CVAR);
5834 bool sRef_isConst (sRef s)
5836 PREDTEST (sRef_isConst, s);
5837 return (s->kind == SK_CONST);
5840 bool sRef_isObject (sRef s)
5842 PREDTEST (sRef_isObject, s);
5843 return (s->kind == SK_OBJECT);
5846 bool sRef_isExternal (sRef s)
5848 PREDTEST (sRef_isExternal, s);
5849 return (s->kind == SK_EXTERNAL);
5852 static bool sRef_isDerived (sRef s)
5854 PREDTEST (sRef_isDerived, s);
5855 return (s->kind == SK_DERIVED);
5858 bool sRef_isField (sRef s)
5860 PREDTEST (sRef_isField, s);
5861 return (s->kind == SK_FIELD);
5864 static bool sRef_isIndex (sRef s)
5866 PREDTEST (sRef_isIndex, s);
5867 return (s->kind == SK_ARRAYFETCH);
5870 bool sRef_isAnyParam (sRef s)
5872 PREDTEST (sRef_isAnyParam, s);
5873 return (s->kind == SK_PARAM);
5876 bool sRef_isParam (sRef s)
5878 PREDTEST (sRef_isParam, s);
5879 return (s->kind == SK_PARAM);
5882 bool sRef_isDirectParam (sRef s)
5884 PREDTEST (sRef_isDirectParam, s);
5886 return ((s->kind == SK_CVAR) &&
5887 (s->info->cvar->lexlevel == functionScope) &&
5888 (context_inFunction () &&
5889 (s->info->cvar->index <= uentryList_size (context_getParams ()))));
5892 bool sRef_isPointer (sRef s)
5894 PREDTEST (sRef_isPointer, s);
5895 return (s->kind == SK_PTR);
5899 ** returns true if storage referenced by s is visible
5902 bool sRef_isReference (sRef s)
5904 PREDTEST (sRef_isReference, s);
5906 return (sRef_isPointer (s) || sRef_isIndex (s) || sRef_isFileOrGlobalScope (s)
5907 || (sRef_isField (s) && (sRef_isReference (s->info->field->rec))));
5910 bool sRef_isIReference (sRef s)
5912 return (sRef_isPointer (s) || sRef_isAddress (s) || sRef_isIndex (s)
5913 || sRef_isField (s) || sRef_isArrayFetch (s));
5916 bool sRef_isFileOrGlobalScope (sRef s)
5918 return (sRef_isCvar (s) && (s->info->cvar->lexlevel <= fileScope));
5921 bool sRef_isRealGlobal (sRef s)
5923 return (sRef_isCvar (s) && (s->info->cvar->lexlevel == globScope));
5926 bool sRef_isFileStatic (sRef s)
5928 return (sRef_isCvar (s) && (s->info->cvar->lexlevel == fileScope));
5931 bool sRef_isAliasCheckedGlobal (sRef s)
5933 if (sRef_isFileOrGlobalScope (s))
5935 uentry ue = sRef_getUentry (s);
5937 return context_checkAliasGlob (ue);
5945 void sRef_free (/*@only@*/ sRef s)
5947 if (s != sRef_undefined && s->kind != SK_SPECIAL)
5949 DPRINTF (("Free sref: [%p]", s));
5951 sRef_checkValid (s);
5953 stateInfo_free (s->expinfo);
5954 stateInfo_free (s->aliasinfo);
5955 stateInfo_free (s->definfo);
5956 stateInfo_free (s->nullinfo);
5958 sRefSet_free (s->deriv);
5959 s->deriv = sRefSet_undefined;
5961 /*@i43@*/ /* valueTable_free (s->state); */
5965 /* drl added to help locate use after release*/
5966 s->expinfo = stateInfo_undefined;
5967 s->aliasinfo = stateInfo_undefined;
5968 s->definfo = stateInfo_undefined;
5969 s->nullinfo = stateInfo_undefined;
5971 /*@i32@*/ sfree (s);
5975 void sRef_setType (sRef s, ctype t)
5977 sRef_checkMutable (s);
5979 if (sRef_isValid (s))
5985 void sRef_setTypeFull (sRef s, ctype t)
5987 sRef_checkMutable (s);
5989 if (sRef_isValid (s))
5993 sRefSet_allElements (s->deriv, current)
5995 sRef_setTypeFull (current, ctype_unknown);
5996 } end_sRefSet_allElements ;
6001 sRef_buildField (/*@exposed@*/ sRef rec, /*@dependent@*/ cstring f)
6003 return (sRef_buildNCField (rec, f));
6006 static /*@exposed@*/ sRef
6007 sRef_findDerivedField (/*@notnull@*/ sRef rec, cstring f)
6009 sRefSet_allElements (rec->deriv, sr)
6011 if (sRef_isValid (sr))
6013 if (sr->info != NULL)
6015 if (sr->kind == SK_FIELD && cstring_equal (sr->info->field->field, f))
6021 } end_sRefSet_allElements;
6023 return sRef_undefined;
6026 /*@dependent@*/ /*@observer@*/ sRefSet sRef_derivedFields (/*@temp@*/ sRef rec)
6028 if (sRef_isValid (rec))
6036 return (sRefSet_undefined);
6040 static /*@exposed@*/ sRef
6041 sRef_findDerivedPointer (sRef s)
6043 if (sRef_isValid (s))
6045 sRefSet_realElements (s->deriv, sr)
6047 if (sRef_isValid (sr) && sr->kind == SK_PTR)
6051 } end_sRefSet_realElements;
6054 return sRef_undefined;
6058 sRef_isUnknownArrayFetch (sRef s)
6060 return (sRef_isValid (s)
6061 && s->kind == SK_ARRAYFETCH
6062 && !s->info->arrayfetch->indknown);
6065 static /*@exposed@*/ sRef
6066 sRef_findDerivedArrayFetch (/*@notnull@*/ sRef s, bool isknown, int idx, bool dead)
6071 sRefSet_realElements (s->deriv, sr)
6073 if (sRef_isValid (sr)
6074 && sr->kind == SK_ARRAYFETCH
6075 && sr->info->arrayfetch->indknown
6076 && (sr->info->arrayfetch->ind == idx))
6080 } end_sRefSet_realElements;
6084 sRefSet_realElements (s->deriv, sr)
6086 if (sRef_isValid (sr)
6087 && sr->kind == SK_ARRAYFETCH
6088 && (!sr->info->arrayfetch->indknown
6089 || (sr->info->arrayfetch->indknown &&
6090 sr->info->arrayfetch->ind == 0)))
6092 if (sRef_isDead (sr) || sRef_isKept (sr))
6094 if (dead || context_getFlag (FLG_STRICTUSERELEASED))
6104 } end_sRefSet_realElements;
6107 return sRef_undefined;
6110 static /*@exposed@*/ sRef
6111 sRef_buildNCField (/*@exposed@*/ sRef rec, /*@exposed@*/ cstring f)
6115 DPRINTF (("Build nc field: %s / %s",
6116 sRef_unparseFull (rec), f));
6118 if (sRef_isInvalid (rec))
6120 return sRef_undefined;
6124 ** check if the field already has been referenced
6127 s = sRef_findDerivedField (rec, f);
6129 if (sRef_isValid (s))
6135 ctype ct = ctype_realType (rec->type);
6137 DPRINTF (("Field of: %s", sRef_unparse (rec)));
6141 s->info = (sinfo) dmalloc (sizeof (*s->info));
6142 s->info->field = (fldinfo) dmalloc (sizeof (*s->info->field));
6143 s->info->field->rec = rec; /* sRef_copy (rec); */ /*@i32@*/
6144 s->info->field->field = f; /* doesn't copy f */
6146 if (ctype_isKnown (ct) && ctype_isSU (ct))
6148 uentry ue = uentryList_lookupField (ctype_getFields (ct), f);
6150 if (!uentry_isUndefined (ue))
6152 DPRINTF (("lookup: %s for %s", uentry_unparseFull (ue),
6153 ctype_unparse (ct)));
6155 s->type = uentry_getType (ue);
6157 if (ctype_isMutable (s->type)
6158 && rec->aliaskind != AK_STACK
6159 && !alkind_isStatic (rec->aliaskind))
6161 s->aliaskind = rec->aliaskind;
6165 s->aliaskind = AK_UNKNOWN;
6168 if (sRef_isStateDefined (rec) || sRef_isStateUnknown (rec)
6169 || sRef_isPdefined (rec))
6171 sRef_setStateFromUentry (s, ue);
6175 sRef_setPartsFromUentry (s, ue);
6178 s->oaliaskind = s->aliaskind;
6179 s->oexpkind = s->expkind;
6181 DPRINTF (("sref: %s", sRef_unparseFull (s)));
6186 Never report this as an error. It can happen whenever there
6187 is casting involved.
6191 llcontbug (message ("buildNCField --- no field %s: %q / %s",
6192 f, sRef_unparse (s), ctype_unparse (ct)));
6196 return sRef_undefined;
6200 if (rec->defstate == SS_DEFINED
6201 && (s->defstate == SS_UNDEFINED || s->defstate == SS_UNKNOWN))
6203 s->defstate = SS_DEFINED;
6205 else if (rec->defstate == SS_PARTIAL)
6207 s->defstate = SS_PARTIAL;
6209 else if (rec->defstate == SS_ALLOCATED)
6211 if (ctype_isStackAllocated (ct) && ctype_isStackAllocated (s->type))
6213 s->defstate = SS_ALLOCATED;
6217 s->defstate = SS_UNDEFINED;
6220 else if (s->defstate == SS_UNKNOWN)
6222 s->defstate = rec->defstate;
6229 if (s->defstate == SS_UNDEFINED)
6231 ctype rt = ctype_realType (s->type);
6233 if (ctype_isArray (rt) || ctype_isSU (rt))
6235 s->defstate = SS_ALLOCATED;
6239 sRef_addDeriv (rec, s);
6240 DPRINTF (("Add deriv: %s", sRef_unparseFull (rec)));
6242 if (ctype_isInt (s->type) && cstring_equal (f, REFSNAME))
6244 s->aliaskind = AK_REFS;
6245 s->oaliaskind = AK_REFS;
6248 DPRINTF (("Build field ==> %s", sRef_unparseFull (s)));
6254 sRef_isStackAllocated (sRef s)
6256 return (sRef_isValid(s)
6257 && s->defstate == SS_ALLOCATED && ctype_isStackAllocated (s->type));
6261 void sRef_setArrayFetchState (/*@notnull@*/ /*@exposed@*/ sRef s,
6262 /*@notnull@*/ /*@exposed@*/ sRef arr)
6264 sRef_checkMutable (s);
6266 if (ctype_isRealAP (arr->type))
6268 s->type = ctype_baseArrayPtr (arr->type);
6271 /* a hack, methinks... makeArrayFetch (&a[0]) ==> a[] */
6272 if (sRef_isAddress (arr))
6274 sRef t = arr->info->ref;
6276 if (sRef_isArrayFetch (t))
6278 s->info->arrayfetch->arr = t->info->arrayfetch->arr;
6281 else if (ctype_isRealPointer (arr->type))
6283 sRef sp = sRef_findDerivedPointer (arr);
6285 if (sRef_isValid (sp))
6288 if (ctype_isMutable (s->type))
6290 sRef_setExKind (s, sRef_getExKind (sp), fileloc_undefined);
6292 s->aliaskind = sp->aliaskind;
6295 s->defstate = sp->defstate;
6297 if (s->defstate == SS_DEFINED)
6299 if (!context_getFlag (FLG_STRICTDESTROY))
6301 s->defstate = SS_PARTIAL;
6305 sRef_setNullStateN (s, sRef_getNullState (sp));
6309 if (arr->defstate == SS_UNDEFINED)
6311 s->defstate = SS_UNUSEABLE;
6313 else if ((arr->defstate == SS_ALLOCATED) && !ctype_isSU (s->type))
6315 s->defstate = SS_UNDEFINED;
6319 if (!context_getFlag (FLG_STRICTDESTROY))
6321 s->defstate = SS_PARTIAL;
6325 s->defstate = SS_DEFINED;
6329 ** Very weak checking for array elements.
6331 ** s->defstate = arr->defstate;
6335 sRef_setExKind (s, sRef_getExKind (arr), g_currentloc);
6337 if (arr->aliaskind == AK_LOCAL || arr->aliaskind == AK_FRESH)
6339 s->aliaskind = AK_LOCAL;
6343 s->aliaskind = AK_UNKNOWN;
6346 sRef_setTypeState (s);
6351 if (arr->defstate == SS_DEFINED)
6354 ** Very weak checking for array elements.
6356 ** s->defstate = arr->defstate;
6359 if (context_getFlag (FLG_STRICTDESTROY))
6361 s->defstate = SS_DEFINED;
6365 s->defstate = SS_PARTIAL;
6368 else if (arr->defstate == SS_ALLOCATED)
6370 if (ctype_isRealArray (s->type))
6372 s->defstate = SS_ALLOCATED;
6376 if (!s->info->arrayfetch->indknown)
6379 ** is index is unknown, elements is defined or
6380 ** allocated is any element is!
6383 s->defstate = SS_UNDEFINED;
6385 sRefSet_allElements (arr->deriv, sr)
6387 if (sRef_isValid (sr))
6389 if (sr->defstate == SS_ALLOCATED)
6391 s->defstate = SS_ALLOCATED;
6395 if (sr->defstate == SS_DEFINED)
6397 if (context_getFlag (FLG_STRICTDESTROY))
6399 s->defstate = SS_DEFINED;
6403 s->defstate = SS_PARTIAL;
6410 } end_sRefSet_allElements;
6415 s->defstate = SS_UNDEFINED;
6421 s->defstate = arr->defstate;
6426 ** kludgey way to guess where aliaskind applies
6429 if (ctype_isMutable (s->type)
6430 && !ctype_isPointer (arr->type)
6431 && !alkind_isStatic (arr->aliaskind)
6432 && !alkind_isStack (arr->aliaskind)) /* evs - 2000-06-20: don't pass stack allocation to members */
6434 s->aliaskind = arr->aliaskind;
6438 s->aliaskind = AK_UNKNOWN;
6441 sRef_setTypeState (s);
6444 if (sRef_isObserver (arr))
6446 s->expkind = XO_OBSERVER;
6450 /*@exposed@*/ sRef sRef_buildArrayFetch (/*@exposed@*/ sRef arr)
6454 if (!sRef_isValid (arr)) {
6455 /*@-nullret@*/ return arr /*@=nullret@*/;
6458 if (ctype_isRealPointer (arr->type))
6460 (void) sRef_buildPointer (arr); /* do this to define arr! */
6463 s = sRef_findDerivedArrayFetch (arr, FALSE, 0, FALSE);
6465 if (sRef_isValid (s))
6467 /* evans 2001-07-12: this is bogus, clean-up hack */
6468 if (s->info->arrayfetch->arr != arr)
6471 check (sRefSet_delete (arr->deriv, s));
6472 res = sRef_buildArrayFetch (arr);
6473 sRef_copyState (res, s);
6477 sRef_setExKind (s, sRef_getExKind (arr), g_currentloc);
6484 s->kind = SK_ARRAYFETCH;
6485 s->info = (sinfo) dmalloc (sizeof (*s->info));
6486 s->info->arrayfetch = (ainfo) dmalloc (sizeof (*s->info->arrayfetch));
6487 s->info->arrayfetch->indknown = FALSE;
6488 s->info->arrayfetch->ind = 0;
6489 s->info->arrayfetch->arr = arr; /* sRef_copy (arr); */ /*@i32@*/
6490 sRef_setArrayFetchState (s, arr);
6491 s->oaliaskind = s->aliaskind;
6492 s->oexpkind = s->expkind;
6494 if (!context_inProtectVars ())
6496 sRef_addDeriv (arr, s);
6499 if (valueTable_isUndefined (s->state))
6501 s->state = context_createValueTable (s, stateInfo_makeLoc (g_currentloc));
6509 sRef_buildArrayFetchKnown (/*@exposed@*/ sRef arr, int i)
6513 if (!sRef_isValid (arr)) {
6514 /*@-nullret@*/ return arr /*@=nullret@*/;
6517 if (ctype_isRealPointer (arr->type))
6519 (void) sRef_buildPointer (arr); /* do this to define arr! */
6522 s = sRef_findDerivedArrayFetch (arr, TRUE, i, FALSE);
6524 if (sRef_isValid (s))
6526 /* evans 2001-07-12: this is bogus, clean-up hack */
6527 if (s->info->arrayfetch->arr != arr)
6530 check (sRefSet_delete (arr->deriv, s));
6531 res = sRef_buildArrayFetchKnown (arr, i);
6532 sRef_copyState (res, s);
6536 sRef_setExKind (s, sRef_getExKind (arr), g_currentloc);
6538 llassert (s->info->arrayfetch->arr == arr);
6545 s->kind = SK_ARRAYFETCH;
6546 s->info = (sinfo) dmalloc (sizeof (*s->info));
6547 s->info->arrayfetch = (ainfo) dmalloc (sizeof (*s->info->arrayfetch));
6548 s->info->arrayfetch->arr = arr; /* sRef_copy (arr); */ /*@i32@*/
6549 s->info->arrayfetch->indknown = TRUE;
6550 s->info->arrayfetch->ind = i;
6552 sRef_setArrayFetchState (s, arr);
6554 s->oaliaskind = s->aliaskind;
6555 s->oexpkind = s->expkind;
6556 sRef_addDeriv (arr, s);
6558 llassert (valueTable_isUndefined (s->state));
6559 s->state = context_createValueTable (s, stateInfo_makeLoc (g_currentloc));
6566 ** sets everything except for defstate
6570 sRef_setPartsFromUentry (sRef s, uentry ue)
6572 sRef uref = uentry_getSref (ue);
6574 llassert (sRef_isValid (s));
6576 s->aliaskind = alkind_derive (s->aliaskind, uentry_getAliasKind (ue));
6577 s->oaliaskind = s->aliaskind;
6579 if (s->expkind == XO_UNKNOWN)
6581 s->expkind = uentry_getExpKind (ue);
6584 s->oexpkind = s->expkind;
6586 if (sRef_getNullState (s) == NS_UNKNOWN)
6588 DPRINTF (("Setting null state!"));
6589 sRef_setNullStateN (s, sRef_getNullState (uentry_getSref (ue)));
6593 DPRINTF (("Skipping null null state!"));
6596 if (s->aliaskind == AK_IMPONLY && (sRef_isExposed (s) || sRef_isObserver (s)))
6598 s->oaliaskind = s->aliaskind = AK_IMPDEPENDENT;
6601 if (sRef_isValid (uref))
6603 valueTable utable = uref->state;
6604 valueTable_free (s->state);
6605 s->state = valueTable_copy (utable);
6610 sRef_setStateFromAbstractUentry (sRef s, uentry ue)
6612 llassert (sRef_isValid (s));
6613 sRef_checkMutable (s);
6615 sRef_setPartsFromUentry (s, ue);
6617 s->aliaskind = alkind_derive (s->aliaskind, uentry_getAliasKind (ue));
6618 s->oaliaskind = s->aliaskind;
6620 if (s->expkind == XO_UNKNOWN)
6622 s->expkind = uentry_getExpKind (ue);
6625 s->oexpkind = s->expkind;
6629 sRef_setStateFromUentry (sRef s, uentry ue)
6633 sRef_checkMutable (s);
6634 llassert (sRef_isValid (s));
6636 sRef_setPartsFromUentry (s, ue);
6638 defstate = uentry_getDefState (ue);
6640 if (sstate_isKnown (defstate))
6642 s->defstate = defstate;
6651 sRef_buildPointer (/*@exposed@*/ sRef t)
6653 DPRINTF (("build pointer: %s", sRef_unparse (t)));
6655 if (sRef_isInvalid (t)) return sRef_undefined;
6657 if (sRef_isAddress (t))
6659 DPRINTF (("Return ref: %s", sRef_unparse (t->info->ref)));
6660 return (t->info->ref);
6664 sRef s = sRef_findDerivedPointer (t);
6666 DPRINTF (("find derived: %s", sRef_unparse (s)));
6668 if (sRef_isValid (s))
6671 sRef_setExKind (s, sRef_getExKind (t), g_currentloc);
6672 s->oaliaskind = s->aliaskind;
6673 s->oexpkind = s->expkind;
6679 s = sRef_constructPointerAux (t);
6681 DPRINTF (("construct: %s", sRef_unparse (s)));
6683 if (sRef_isValid (s))
6685 sRef_addDeriv (t, s);
6687 s->oaliaskind = s->aliaskind;
6688 s->oexpkind = s->expkind;
6697 sRef_constructPointer (/*@exposed@*/ sRef t)
6700 return sRef_buildPointer (t);
6703 static /*@exposed@*/ sRef sRef_constructDerefAux (sRef t, bool isdead)
6705 if (sRef_isValid (t))
6710 ** if there is a derived t[?], return that. Otherwise, *t.
6713 s = sRef_findDerivedArrayFetch (t, FALSE, 0, isdead);
6715 if (sRef_isValid (s))
6717 DPRINTF (("Found array fetch: %s", sRef_unparseFull (s)));
6722 sRef ret = sRef_constructPointer (t);
6724 DPRINTF (("Constructed pointer: %s", sRef_unparseFull (ret)));
6731 return sRef_undefined;
6735 sRef sRef_constructDeref (sRef t)
6737 return sRef_constructDerefAux (t, FALSE);
6740 sRef sRef_constructDeadDeref (sRef t)
6742 return sRef_constructDerefAux (t, TRUE);
6746 sRef_constructPointerAux (/*@notnull@*/ /*@exposed@*/ sRef t)
6748 sRef s = sRef_newRef ();
6752 llassert (valueTable_isUndefined (s->state));
6755 s->info = (sinfo) dmalloc (sizeof (*s->info));
6756 s->info->ref = t; /* sRef_copy (t); */ /*@i32*/
6758 if (ctype_isRealAP (rt))
6760 s->type = ctype_baseArrayPtr (rt);
6763 st = ctype_realType (s->type);
6765 if (t->defstate == SS_UNDEFINED)
6767 s->defstate = SS_UNUSEABLE;
6769 else if ((t->defstate == SS_ALLOCATED) && !ctype_isSU (st))
6771 s->defstate = SS_UNDEFINED;
6775 s->defstate = t->defstate;
6778 if (t->aliaskind == AK_LOCAL || t->aliaskind == AK_FRESH)
6780 s->aliaskind = AK_LOCAL;
6784 s->aliaskind = AK_UNKNOWN;
6787 sRef_setExKind (s, sRef_getExKind (t), fileloc_undefined);
6788 sRef_setTypeState (s);
6790 s->oaliaskind = s->aliaskind;
6791 s->oexpkind = s->expkind;
6793 if (valueTable_isUndefined (s->state))
6795 s->state = context_createValueTable (s, stateInfo_makeLoc (g_currentloc));
6801 bool sRef_hasDerived (sRef s)
6803 return (sRef_isValid (s) && !sRefSet_isEmpty (s->deriv));
6807 sRef_clearDerived (sRef s)
6809 if (sRef_isValid (s))
6811 sRefSet_clear (s->deriv);
6816 sRef_clearDerivedComplete (sRef s)
6819 if (sRef_isValid (s))
6821 sRef base = sRef_getBaseSafe (s);
6823 while (sRef_isValid (base))
6825 sRefSet_clear (base->deriv);
6826 base = sRef_getBaseSafe (base);
6829 sRefSet_clear (s->deriv);
6833 /*@exposed@*/ sRef sRef_makePointer (/*@exposed@*/ sRef s)
6836 sRef res = sRef_buildPointer (s);
6838 DPRINTF (("Res: %s", sRef_unparse (res)));
6843 ** &a[] => a (this is for out params)
6847 sRef_makeAnyArrayFetch (/*@exposed@*/ sRef arr)
6850 if (sRef_isAddress (arr))
6852 return (arr->info->ref);
6856 return (sRef_buildArrayFetch (arr));
6861 sRef_makeArrayFetch (/*@exposed@*/ sRef arr)
6863 return (sRef_buildArrayFetch (arr));
6867 sRef_makeArrayFetchKnown (/*@exposed@*/ sRef arr, int i)
6869 return (sRef_buildArrayFetchKnown (arr, i));
6873 sRef_makeField (sRef rec, /*@dependent@*/ cstring f)
6876 ret = sRef_buildField (rec, f);
6881 sRef_makeNCField (/*@exposed@*/ sRef rec, /*@dependent@*/ cstring f)
6883 return (sRef_buildNCField (rec, f));
6887 sRef_unparseKindName (sRef s)
6891 if (s == sRef_undefined) return cstring_makeLiteral ("<invalid>");
6893 s = sRef_fixConj (s);
6898 if (sRef_isLocalVar (s))
6900 result = cstring_makeLiteral ("Variable");
6904 result = cstring_makeLiteral ("Undef global");
6908 result = cstring_makeLiteral ("Out parameter");
6911 if (sRef_isAnyParam (s->info->arrayfetch->arr))
6913 result = cstring_makeLiteral ("Out parameter");
6915 else if (sRef_isIndexKnown (s))
6917 result = cstring_makeLiteral ("Array element");
6921 result = cstring_makeLiteral ("Value");
6925 if (sRef_isAnyParam (s->info->ref))
6927 result = cstring_makeLiteral ("Out parameter");
6931 result = cstring_makeLiteral ("Value");
6935 result = cstring_makeLiteral ("Value");
6938 result = cstring_makeLiteral ("Field");
6941 result = cstring_makeLiteral ("Object");
6943 case SK_UNCONSTRAINED:
6944 result = cstring_makeLiteral ("<anything>");
6953 result = cstring_makeLiteral ("<unknown>");
6956 result = cstring_makeLiteral ("<conj>");
6959 result = cstring_makeLiteral ("Storage");
6967 sRef_unparseKindNamePlain (sRef s)
6971 if (s == sRef_undefined) return cstring_makeLiteral ("<invalid>");
6973 s = sRef_fixConj (s);
6978 if (sRef_isLocalVar (s))
6980 result = cstring_makeLiteral ("Variable");
6984 result = cstring_makeLiteral ("Global");
6988 result = cstring_makeLiteral ("Parameter");
6991 if (sRef_isAnyParam (s->info->arrayfetch->arr))
6993 result = cstring_makeLiteral ("Parameter");
6995 else if (sRef_isIndexKnown (s))
6997 result = cstring_makeLiteral ("Array element");
7001 result = cstring_makeLiteral ("Value");
7005 if (sRef_isAnyParam (s->info->ref))
7007 result = cstring_makeLiteral ("Parameter");
7011 result = cstring_makeLiteral ("Value");
7015 result = cstring_makeLiteral ("Value");
7018 result = cstring_makeLiteral ("Field");
7021 result = cstring_makeLiteral ("Object");
7024 result = cstring_makeLiteral ("Storage");
7026 case SK_UNCONSTRAINED:
7027 result = cstring_makeLiteral ("<anything>");
7036 result = cstring_makeLiteral ("<unknown>");
7039 result = cstring_makeLiteral ("<conj>");
7051 sRef_copyState (sRef s1, sRef s2)
7053 if (sRef_isValid (s1) && sRef_isValid (s2))
7055 s1->defstate = s2->defstate;
7057 /* start modifications */
7058 s1->bufinfo.bufstate = s2->bufinfo.bufstate;
7059 s1->bufinfo.len = s2->bufinfo.len;
7060 s1->bufinfo.size = s2->bufinfo.size;
7061 /* end modifications */
7063 s1->aliaskind = s2->aliaskind;
7064 s1->aliasinfo = stateInfo_update (s1->aliasinfo, s2->aliasinfo);
7066 s1->expkind = s2->expkind;
7067 s1->expinfo = stateInfo_update (s1->expinfo, s2->expinfo);
7069 s1->nullstate = s2->nullstate;
7070 s1->nullinfo = stateInfo_update (s1->nullinfo, s2->nullinfo);
7073 /*@i834 don't free it: valueTable_free (s1->state); */
7074 /*@i32@*/ s1->state = valueTable_copy (s2->state);
7076 s1->safe = s2->safe;
7081 sRef_makeNew (ctype ct, sRef t, cstring name)
7083 sRef s = sRef_newRef ();
7088 llassert (sRef_isValid (t));
7089 s->defstate = t->defstate;
7091 s->aliaskind = t->aliaskind;
7092 s->oaliaskind = s->aliaskind;
7093 s->nullstate = t->nullstate;
7095 s->expkind = t->expkind;
7096 s->oexpkind = s->expkind;
7098 s->info = (sinfo) dmalloc (sizeof (*s->info));
7099 s->info->fname = name;
7101 /* start modifications */
7102 s->bufinfo.bufstate = t->bufinfo.bufstate;
7103 /* end modifications */
7105 llassert (valueTable_isUndefined (s->state));
7106 s->state = valueTable_copy (t->state);
7108 DPRINTF (("==> Copying state: %s", valueTable_unparse (s->state)));
7109 DPRINTF (("==> new: %s", sRef_unparseFull (s)));
7114 sRef_makeType (ctype ct)
7116 sRef s = sRef_newRef ();
7118 sRef_checkMutable (s);
7123 s->defstate = SS_UNKNOWN;
7124 s->aliaskind = AK_UNKNOWN;
7125 sRef_setNullStateN (s, NS_UNKNOWN);
7127 /* start modification */
7128 s->bufinfo.bufstate = BB_NOTNULLTERMINATED;
7129 /* end modification */
7132 if (ctype_isUA (ct))
7134 typeId uid = ctype_typeId (ct);
7135 uentry ue = usymtab_getTypeEntrySafe (uid);
7137 if (uentry_isValid (ue))
7139 sRef_mergeStateQuiet (s, uentry_getSref (ue));
7143 s->oaliaskind = s->aliaskind;
7144 s->oexpkind = s->expkind;
7145 llassert (valueTable_isUndefined (s->state));
7146 s->state = context_createValueTable (s, stateInfo_makeLoc (g_currentloc));
7148 DPRINTF (("Create: %s", sRef_unparseFull (s)));
7153 sRef_makeConst (ctype ct)
7155 sRef s = sRef_newRef ();
7160 s->defstate = SS_UNKNOWN;
7161 s->aliaskind = AK_UNKNOWN;
7162 sRef_setNullStateN (s, NS_UNKNOWN);
7164 /* start modification */
7165 s->bufinfo.bufstate = BB_NULLTERMINATED;
7166 /* end modification */
7167 if (ctype_isUA (ct))
7169 typeId uid = ctype_typeId (ct);
7170 uentry te = usymtab_getTypeEntrySafe (uid);
7172 if (uentry_isValid (te))
7174 sRef_mergeStateQuiet (s, uentry_getSref (te));
7179 s->oaliaskind = s->aliaskind;
7180 s->oexpkind = s->expkind;
7182 llassert (valueTable_isUndefined (s->state));
7183 s->state = context_createValueTable (s, stateInfo_makeLoc (g_currentloc));
7188 bool sRef_hasName (sRef s)
7190 if (sRef_isInvalid (s))
7199 uentry u = usymtab_getRefQuiet (s->info->cvar->lexlevel,
7200 s->info->cvar->index);
7201 return (uentry_hasName (u));
7205 if (s->info->paramno >= 0)
7207 uentry u = uentryList_getN (context_getParams (),
7210 return (uentry_hasName (u));
7214 llassert (s->info->paramno == PARAMUNKNOWN);
7224 sRef_sameName (sRef s1, sRef s2)
7226 if (sRef_isInvalid (s1))
7228 return sRef_isInvalid (s2);
7231 if (sRef_isInvalid (s2))
7239 if (s2->kind == SK_CVAR)
7241 return (s1->info->cvar->lexlevel == s2->info->cvar->lexlevel
7242 && s1->info->cvar->index == s2->info->cvar->index);
7244 else if (s2->kind == SK_PARAM)
7246 if (context_inFunctionLike ())
7248 if (s2->info->paramno != PARAMUNKNOWN)
7250 uentry u1 = usymtab_getRefQuiet (s1->info->cvar->lexlevel,
7251 s1->info->cvar->index);
7252 uentry u2 = uentryList_getN (context_getParams (),
7255 return (cstring_equalFree (uentry_getName (u1),
7256 uentry_getName (u2)));
7260 return s1->info->paramno == PARAMUNKNOWN;
7274 if (s2->kind == SK_PARAM)
7276 return (s1->info->paramno == s2->info->paramno);
7278 else if (s2->kind == SK_CVAR)
7280 if (context_inFunctionLike ())
7282 if (s1->info->paramno == PARAMUNKNOWN)
7288 uentry u1 = uentryList_getN (context_getParams (),
7290 uentry u2 = usymtab_getRefQuiet (s2->info->cvar->lexlevel,
7291 s2->info->cvar->index);
7294 return (cstring_equalFree (uentry_getName (u1),
7295 uentry_getName (u2)));
7309 case SK_UNCONSTRAINED:
7313 if (s2->kind == SK_ARRAYFETCH)
7315 if (bool_equal (s1->info->arrayfetch->indknown,
7316 s2->info->arrayfetch->indknown))
7318 if (!s1->info->arrayfetch->indknown
7319 || (s1->info->arrayfetch->ind == s2->info->arrayfetch->ind))
7321 return sRef_sameName (s1->info->arrayfetch->arr,
7322 s2->info->arrayfetch->arr);
7329 if (s2->kind == SK_FIELD)
7331 if (cstring_equal (s1->info->field->field,
7332 s2->info->field->field))
7334 return sRef_sameName (s1->info->field->rec,
7335 s2->info->field->rec);
7344 if (s2->kind == s1->kind)
7346 return sRef_sameName (s1->info->ref,
7354 return sRef_sameName (sRef_getConjA (s1), s2);
7358 return (s2->kind == SK_UNKNOWN);
7361 if (s2->kind == s1->kind)
7363 return (ctype_equal (s1->type, s2->type));
7368 if (s2->kind == SK_SPECIAL)
7370 return (s1->info->spec == s2->info->spec);
7374 return (s2->kind == SK_RESULT);
7382 sRef_fixOuterRef (/*@returned@*/ sRef s)
7384 sRef root = sRef_getRootBase (s);
7386 if (sRef_isCvar (root))
7388 uentry ue = usymtab_getRefQuiet (root->info->cvar->lexlevel,
7389 root->info->cvar->index);
7391 if (uentry_isValid (ue))
7393 sRef uref = uentry_getSref (ue);
7394 sRef sr = sRef_fixBase (s, uref);
7400 llcontbug (message ("sRef_fixOuterRef: undefined: %q", sRef_unparseDebug (s)));
7409 sRef_storeState (sRef s)
7411 if (sRef_isInvalid (s)) return;
7413 sRef_checkMutable (s);
7414 s->oaliaskind = s->aliaskind;
7415 s->oexpkind = s->expkind;
7418 static void sRef_resetStateAux (sRef s, /*@unused@*/ fileloc loc)
7420 sRef_resetState (s);
7424 sRef_resetState (sRef s)
7426 bool changed = FALSE;
7427 if (sRef_isInvalid (s)) return;
7430 if (s->oaliaskind == AK_KILLREF && !sRef_isParam (s))
7433 ** killref is used in a kludgey way, to save having to add
7434 ** another alias kind (see usymtab_handleParams)
7437 if (s->expkind != s->oexpkind)
7440 s->expkind = s->oexpkind;
7445 if (s->expkind != s->oexpkind)
7448 s->expkind = s->oexpkind;
7451 if (s->aliaskind != s->oaliaskind
7452 && s->aliaskind != AK_REFCOUNTED
7453 && s->aliaskind != AK_REFS)
7456 s->aliaskind = s->oaliaskind;
7462 sRef_clearDerived (s);
7468 sRef_resetStateComplete (sRef s)
7470 sRef_innerAliasSetComplete (sRef_resetStateAux, s, fileloc_undefined);
7474 sRef_fixBase (/*@returned@*/ sRef s, /*@returned@*/ sRef base)
7476 sRef tmp = sRef_undefined;
7479 if (sRef_isInvalid (s)) return s;
7480 if (sRef_isInvalid (base)) return base;
7490 tmp = sRef_fixBase (s->info->arrayfetch->arr, base);
7492 if (s->info->arrayfetch->indknown)
7494 ret = sRef_makeArrayFetchKnown (tmp, s->info->arrayfetch->ind);
7498 ret = sRef_makeArrayFetch (tmp);
7502 tmp = sRef_fixBase (s->info->field->rec, base);
7503 ret = sRef_buildNCField (tmp, s->info->field->field);
7506 tmp = sRef_fixBase (s->info->ref, base);
7507 ret = sRef_makePointer (tmp);
7510 tmp = sRef_fixBase (s->info->ref, base);
7511 ret = sRef_makeAddress (tmp);
7517 tmp = sRef_fixBase (s->info->conj->a, base);
7518 tmpb = sRef_fixBase (s->info->conj->b, base);
7520 ret = sRef_makeConj (tmp, tmpb);
7529 static /*@exposed@*/ sRef
7530 sRef_fixDirectBase (sRef s, sRef base)
7535 if (sRef_isInvalid (s))
7537 return sRef_undefined;
7543 if (s->info->arrayfetch->indknown)
7545 ret = sRef_makeArrayFetchKnown (base, s->info->arrayfetch->ind);
7549 ret = sRef_makeArrayFetch (base);
7553 ret = sRef_buildNCField (base, s->info->field->field);
7556 ret = sRef_makePointer (base);
7559 ret = sRef_makeAddress (base);
7565 tmpa = sRef_fixDirectBase (s->info->conj->a, base);
7566 tmpb = sRef_fixDirectBase (s->info->conj->b, base);
7568 ret = sRef_makeConj (tmpa, tmpb);
7574 sRef_copyState (ret, s);
7579 sRef_isAllocIndexRef (sRef s)
7581 return (sRef_isArrayFetch (s) && !(s->info->arrayfetch->indknown)
7582 && sRef_isAllocated (s->info->arrayfetch->arr));
7586 sRef_showRefLost (sRef s)
7588 if (sRef_hasAliasInfoLoc (s))
7590 llgenindentmsg (cstring_makeLiteral ("Original reference lost"),
7591 sRef_getAliasInfoLoc (s));
7596 sRef_showRefKilled (sRef s)
7598 if (sRef_hasStateInfoLoc (s))
7600 llgenindentmsg (message ("Storage %q released",
7601 sRef_unparse (s)), sRef_getStateInfoLoc (s));
7606 sRef_showStateInconsistent (sRef s)
7608 if (sRef_hasStateInfoLoc (s))
7611 (message ("Storage %qbecomes inconsistent (released on one branch)",
7612 sRef_unparseOpt (s)),
7613 sRef_getStateInfoLoc (s));
7618 sRef_showStateInfo (sRef s)
7620 if (sRef_hasStateInfoLoc (s))
7622 if (s->defstate == SS_DEAD)
7625 (message ("Storage %qis released", sRef_unparseOpt (s)),
7626 sRef_getStateInfoLoc (s));
7628 else if (s->defstate == SS_ALLOCATED || s->defstate == SS_DEFINED)
7631 (message ("Storage %qis %s", sRef_unparseOpt (s),
7632 sstate_unparse (s->defstate)),
7633 sRef_getStateInfoLoc (s));
7635 else if (s->defstate == SS_UNUSEABLE)
7638 (message ("Storage %qbecomes inconsistent (clauses merge with"
7639 "%qreleased on one branch)",
7640 sRef_unparseOpt (s),
7641 sRef_unparseOpt (s)),
7642 sRef_getStateInfoLoc (s));
7646 llgenindentmsg (message ("Storage %qbecomes %s",
7647 sRef_unparseOpt (s),
7648 sstate_unparse (s->defstate)),
7649 sRef_getStateInfoLoc (s));
7655 sRef_showExpInfo (sRef s)
7657 if (sRef_hasExpInfoLoc (s))
7659 llgenindentmsg (message ("Storage %qbecomes %s", sRef_unparseOpt (s),
7660 exkind_unparse (s->expkind)),
7661 sRef_getExpInfoLoc (s));
7666 sRef_showMetaStateInfo (sRef s, cstring key)
7669 metaStateInfo minfo = context_lookupMetaStateInfo (key);
7671 llassert (sRef_isValid (s));
7672 llassert (valueTable_isDefined (s->state));
7673 llassert (metaStateInfo_isDefined (minfo));
7675 val = valueTable_lookup (s->state, key);
7677 if (stateValue_hasLoc (val))
7680 (message ("Meta state %qbecomes %q", sRef_unparseOpt (s),
7681 stateValue_unparseValue (val, minfo)),
7682 stateValue_getLoc (val));
7687 sRef_showNullInfo (sRef s)
7689 DPRINTF (("Show null info: %s", sRef_unparseFull (s)));
7691 if (sRef_hasNullInfoLoc (s) && sRef_isKnown (s))
7693 DPRINTF (("has null info: %s",
7694 fileloc_unparse (sRef_getNullInfoLoc (s))));
7696 switch (sRef_getNullState (s))
7700 fileloc loc = sRef_getNullInfoLoc (s);
7702 if (fileloc_isDefined (loc) && !fileloc_isLib (loc))
7705 (message ("Storage %qbecomes null", sRef_unparseOpt (s)),
7712 fileloc loc = sRef_getNullInfoLoc (s);
7714 if (fileloc_isDefined (loc) && !fileloc_isLib (loc))
7716 llgenindentmsg (message ("Storage %qbecomes null", sRef_unparseOpt (s)),
7724 (message ("Storage %qmay become null", sRef_unparseOpt (s)),
7725 sRef_getNullInfoLoc (s));
7730 (message ("Storage %qbecomes not null", sRef_unparseOpt (s)),
7731 sRef_getNullInfoLoc (s));
7735 (message ("Storage %qnull state becomes unknown",
7736 sRef_unparseOpt (s)),
7737 sRef_getNullInfoLoc (s));
7746 (message ("<error case> Storage %q becomes %s",
7748 nstate_unparse (sRef_getNullState (s))),
7749 sRef_getNullInfoLoc (s));
7757 sRef_showAliasInfo (sRef s)
7759 if (sRef_hasAliasInfoLoc (s))
7761 if (sRef_isFresh (s))
7764 (message ("Fresh storage %qallocated", sRef_unparseOpt (s)),
7765 sRef_getAliasInfoLoc (s));
7769 if (!sRef_isRefCounted (s))
7772 (message ("Storage %qbecomes %s",
7773 sRef_unparseOpt (s),
7774 alkind_unparse (sRef_getAliasKind (s))),
7775 sRef_getAliasInfoLoc (s));
7782 sRef_mergeNullState (sRef s, nstate n)
7784 if (sRef_isValid (s))
7788 old = sRef_getNullState (s);
7790 if (n != old && n != NS_UNKNOWN)
7792 sRef_setNullState (s, n, g_currentloc);
7797 llbuglit ("sRef_mergeNullState: invalid");
7802 sRef_possiblyNull (sRef s)
7804 if (sRef_isValid (s))
7806 if (sRef_getNullState (s) == NS_ABSNULL)
7808 ctype rct = ctype_realType (s->type);
7810 if (ctype_isAbstract (rct))
7816 if (ctype_isUser (rct))
7818 uentry ue = usymtab_getTypeEntry (ctype_typeId (rct));
7820 return (nstate_possiblyNull
7821 (sRef_getNullState (uentry_getSref (ue))));
7831 return nstate_possiblyNull (sRef_getNullState (s));
7839 sRef_getScopeName (sRef s)
7841 sRef base = sRef_getRootBase (s);
7843 if (sRef_isRealGlobal (base))
7845 return (cstring_makeLiteralTemp ("Global"));
7847 else if (sRef_isFileStatic (base))
7849 return (cstring_makeLiteralTemp ("Static"));
7853 return (cstring_makeLiteralTemp ("Local"));
7858 sRef_unparseScope (sRef s)
7860 sRef base = sRef_getRootBase (s);
7862 if (sRef_isRealGlobal (base))
7864 return (cstring_makeLiteralTemp ("global"));
7866 else if (sRef_isFileStatic (base))
7868 return (cstring_makeLiteralTemp ("file static"));
7877 sRef_getScope (sRef s)
7879 llassert (sRef_isValid (s));
7881 if (sRef_isCvar (s))
7883 return s->info->cvar->lexlevel;
7885 else if (sRef_isParam (s))
7896 sRef_isDead (sRef s)
7898 return (sRef_isValid (s) && (s)->defstate == SS_DEAD);
7902 sRef_isDeadStorage (sRef s)
7904 if (sRef_isValid (s))
7906 if (s->defstate == SS_DEAD
7907 || s->defstate == SS_UNUSEABLE
7908 || s->defstate == SS_UNDEFINED
7909 || s->defstate == SS_UNKNOWN)
7915 return (sRef_isDefinitelyNull (s));
7925 sRef_isPossiblyDead (sRef s)
7927 return (sRef_isValid (s) && s->defstate == SS_HOFFA);
7930 bool sRef_isStateLive (sRef s)
7932 if (sRef_isValid (s))
7934 sstate ds = s->defstate;
7936 return (!(ds == SS_UNDEFINED
7938 || ds == SS_UNUSEABLE
7939 || ds == SS_HOFFA));
7948 bool sRef_isStateUndefined (sRef s)
7950 return ((sRef_isValid(s)) && ((s)->defstate == SS_UNDEFINED));
7953 bool sRef_isJustAllocated (sRef s)
7955 if (sRef_isAllocated (s))
7957 sRefSet_allElements (s->deriv, el)
7959 if (!(sRef_isStateUndefined (el) || sRef_isUnuseable (el)))
7963 } end_sRefSet_allElements ;
7972 sRef_isAllocatedStorage (sRef s)
7974 if (sRef_isValid (s) && ynm_toBoolStrict (sRef_isReadable (s)))
7976 return (ctype_isVisiblySharable (sRef_getType (s)));
7985 sRef_isUnuseable (sRef s)
7987 return ((sRef_isValid(s)) && ((s)->defstate == SS_UNUSEABLE));
7991 sRef_perhapsNull (sRef s)
7993 if (sRef_isValid (s))
7995 if (sRef_getNullState (s) == NS_ABSNULL)
7997 ctype rct = ctype_realType (s->type);
7999 if (ctype_isAbstract (rct))
8005 if (ctype_isUser (rct))
8007 uentry ue = usymtab_getTypeEntry (ctype_typeId (rct));
8009 return (nstate_perhapsNull
8010 (sRef_getNullState (uentry_getSref (ue))));
8020 return nstate_perhapsNull (sRef_getNullState (s));
8028 ** definitelyNull --- called when TRUE is good
8032 sRef_definitelyNull (sRef s)
8034 return (sRef_isValid (s)
8035 && (sRef_getNullState (s) == NS_DEFNULL || sRef_getNullState (s) == NS_CONSTNULL));
8039 ** based on sRef_similar
8043 sRef_setDerivNullState (sRef set, sRef guide, nstate ns)
8045 if (sRef_isValid (set))
8047 sRef deriv = sRef_getDeriv (set, guide);
8049 if (sRef_isValid (deriv))
8051 sRef_setNullStateN (deriv, ns);
8056 static /*@exposed@*/ sRef
8057 sRef_getDeriv (/*@returned@*/ /*@notnull@*/ sRef set, sRef guide)
8059 llassert (sRef_isValid (set));
8060 llassert (sRef_isValid (guide));
8062 switch (guide->kind)
8065 llassert (set->kind == SK_CVAR);
8070 llassert (set->kind == guide->kind);
8071 llassert (set->info->paramno == guide->info->paramno);
8077 if (set->kind == SK_ARRAYFETCH
8078 && (sRef_similar (set->info->arrayfetch->arr,
8079 guide->info->arrayfetch->arr)))
8085 return (sRef_makeAnyArrayFetch
8086 (sRef_getDeriv (set, guide->info->arrayfetch->arr)));
8091 if (set->kind == SK_PTR && sRef_similar (set->info->ref, guide->info->ref))
8097 return (sRef_makePointer (sRef_getDeriv (set, guide->info->ref)));
8102 if ((set->kind == SK_FIELD &&
8103 (sRef_similar (set->info->field->rec, guide->info->field->rec) &&
8104 cstring_equal (set->info->field->field, guide->info->field->field))))
8110 return (sRef_makeField (sRef_getDeriv (set, guide->info->field->rec),
8111 guide->info->field->field));
8115 if ((set->kind == SK_ADR) && sRef_similar (set->info->ref, guide->info->ref))
8121 return (sRef_makeAddress (sRef_getDeriv (set, guide->info->ref)));
8126 return sRef_undefined;
8130 case SK_UNCONSTRAINED:
8138 return sRef_undefined;
8145 ** sRef_aliasCheckPred
8147 ** A confusing but spiffy function:
8149 ** Calls predf (s, e, text, <alias>) on s and all of s's aliases
8150 ** (unless checkAliases (s) is FALSE).
8152 ** For alias calls, calls as
8153 ** predf (alias, e, text, s)
8157 sRef_aliasCheckPred (bool (predf) (sRef, exprNode, sRef, exprNode),
8158 /*@null@*/ bool (checkAliases) (sRef),
8159 sRef s, exprNode e, exprNode err)
8161 bool error = (*predf)(s, e, sRef_undefined, err);
8164 if (checkAliases != NULL && !(checkAliases (s)))
8166 /* don't check aliases */
8170 sRefSet aliases = usymtab_allAliases (s);
8173 sRefSet_realElements (aliases, current)
8175 if (sRef_isValid (current))
8177 if (!sRef_similar (current, s)
8178 || (error && sRef_sameName (current, s)))
8180 (void) (*predf)(current, e, s, err);
8183 } end_sRefSet_realElements;
8185 sRefSet_free (aliases);
8190 ** return TRUE iff predf (s) is true for s or any alias of s
8194 sRef_aliasCheckSimplePred (sRefTest predf, sRef s)
8205 aliases = usymtab_allAliases (s);
8207 sRefSet_realElements (aliases, current)
8209 if (sRef_isValid (current))
8211 sRef cref = sRef_updateSref (current);
8213 /* Whoa! a very kludgey way to make sure the right sref is used
8214 ** where there is a conditional symbol table. I am beginning
8215 ** to think that having a conditional symbol table wasn't such
8221 DPRINTF (("Checking alias: %s", sRef_unparseFull (cref)));
8222 sRefSet_free (aliases);
8226 } end_sRefSet_realElements;
8228 sRefSet_free (aliases);
8234 sRef_aliasCompleteSimplePred (bool (predf) (sRef), sRef s)
8237 bool result = FALSE;
8240 aliases = usymtab_allAliases (s);
8242 if ((*predf)(s)) result = TRUE;
8245 sRefSet_realElements (aliases, current)
8247 if (sRef_isValid (current))
8249 current = sRef_updateSref (current);
8250 if ((*predf)(current)) result = TRUE;
8252 } end_sRefSet_realElements;
8254 sRefSet_free (aliases);
8259 sRef_aliasSetComplete (void (predf) (sRef, fileloc), sRef s, fileloc loc)
8263 aliases = usymtab_allAliases (s);
8265 DPRINTF (("All aliases: %s", sRefSet_unparseFull (aliases)));
8269 sRefSet_realElements (aliases, current)
8271 if (sRef_isValid (current))
8273 current = sRef_updateSref (current);
8274 ((*predf)(current, loc));
8276 } end_sRefSet_realElements;
8278 sRefSet_free (aliases);
8282 sRef_aliasSetCompleteParam (void (predf) (sRef, alkind, fileloc), sRef s,
8283 alkind kind, fileloc loc)
8288 if (sRef_isDeep (s))
8290 aliases = usymtab_allAliases (s);
8294 aliases = usymtab_aliasedBy (s);
8297 (*predf)(s, kind, loc);
8299 sRefSet_realElements (aliases, current)
8301 if (sRef_isValid (current))
8303 current = sRef_updateSref (current);
8304 ((*predf)(current, kind, loc));
8306 } end_sRefSet_realElements;
8308 sRefSet_free (aliases);
8312 sRef_innerAliasSetComplete (void (predf) (sRef, fileloc), sRef s, fileloc loc)
8318 if (!sRef_isValid (s)) return;
8322 ** Type equivalence checking is necessary --- there might be casting.
8329 case SK_UNCONSTRAINED:
8334 inner = s->info->ref;
8335 aliases = usymtab_allAliases (inner);
8336 ct = sRef_getType (inner);
8338 sRefSet_realElements (aliases, current)
8340 if (sRef_isValid (current))
8342 current = sRef_updateSref (current);
8344 if (ctype_equal (ct, sRef_getType (current)))
8346 sRef ptr = sRef_makePointer (current);
8347 ((*predf)(ptr, loc));
8350 } end_sRefSet_realElements;
8352 sRefSet_free (aliases);
8355 inner = s->info->arrayfetch->arr;
8356 aliases = usymtab_allAliases (inner);
8357 ct = sRef_getType (inner);
8359 DPRINTF (("Array fetch: %s", sRefSet_unparse (aliases)));
8361 sRefSet_realElements (aliases, current)
8363 if (sRef_isValid (current))
8365 current = sRef_updateSref (current);
8366 DPRINTF (("Current: %s", sRef_unparseFull (current)));
8368 if (ctype_equal (ct, sRef_getType (current)))
8370 if (s->info->arrayfetch->indknown)
8372 sRef af = sRef_makeArrayFetchKnown (current, s->info->arrayfetch->ind);
8373 DPRINTF (("Defining: %s", sRef_unparseFull (af)));
8374 llassert (af->info->arrayfetch->arr == current);
8375 ((*predf)(af, loc));
8379 sRef af = sRef_makeArrayFetch (current);
8380 llassert (af->info->arrayfetch->arr == current);
8381 DPRINTF (("Defining: %s", sRef_unparseFull (af)));
8382 ((*predf)(af, loc));
8387 DPRINTF (("Type mismatch: %s / %s",
8389 ctype_unparse (sRef_getType (current))));
8392 } end_sRefSet_realElements;
8394 sRefSet_free (aliases);
8397 inner = s->info->field->rec;
8398 aliases = usymtab_allAliases (inner);
8399 ct = sRef_getType (inner);
8402 sRefSet_realElements (aliases, current)
8404 if (sRef_isValid (current))
8406 current = sRef_updateSref (current);
8408 if (ctype_equal (ct, sRef_getType (current)))
8410 sRef f = sRef_makeField (current, s->info->field->field);
8415 } end_sRefSet_realElements;
8417 sRefSet_free (aliases);
8420 sRef_innerAliasSetComplete (predf, s->info->conj->a, loc);
8421 sRef_innerAliasSetComplete (predf, s->info->conj->b, loc);
8438 sRef_innerAliasSetCompleteParam (void (predf) (sRef, sRef), sRef s, sRef t)
8444 if (!sRef_isValid (s)) return;
8448 ** Type equivalence checking is necessary --- there might be casting.
8455 case SK_UNCONSTRAINED:
8460 inner = s->info->ref;
8461 aliases = usymtab_allAliases (inner);
8462 ct = sRef_getType (inner);
8465 sRefSet_realElements (aliases, current)
8467 if (sRef_isValid (current))
8469 current = sRef_updateSref (current);
8471 if (ctype_equal (ct, sRef_getType (current)))
8473 sRef ptr = sRef_makePointer (current);
8478 } end_sRefSet_realElements;
8480 sRefSet_free (aliases);
8483 inner = s->info->arrayfetch->arr;
8484 aliases = usymtab_allAliases (inner);
8485 ct = sRef_getType (inner);
8487 sRefSet_realElements (aliases, current)
8489 if (sRef_isValid (current))
8491 current = sRef_updateSref (current);
8493 if (ctype_equal (ct, sRef_getType (current)))
8496 if (s->info->arrayfetch->indknown)
8498 sRef af = sRef_makeArrayFetchKnown (current, s->info->arrayfetch->ind);
8504 sRef af = sRef_makeArrayFetch (current);
8510 } end_sRefSet_realElements;
8512 sRefSet_free (aliases);
8515 inner = s->info->field->rec;
8516 aliases = usymtab_allAliases (inner);
8517 ct = sRef_getType (inner);
8520 sRefSet_realElements (aliases, current)
8522 if (sRef_isValid (current))
8524 current = sRef_updateSref (current);
8526 if (ctype_equal (ct, sRef_getType (current)))
8528 sRef f = sRef_makeField (current, s->info->field->field);
8533 } end_sRefSet_realElements;
8535 sRefSet_free (aliases);
8538 sRef_innerAliasSetCompleteParam (predf, s->info->conj->a, t);
8539 sRef_innerAliasSetCompleteParam (predf, s->info->conj->b, t);
8555 static void sRef_combineExKinds (/*@notnull@*/ sRef res, /*@notnull@*/ sRef other)
8557 exkind a1 = sRef_getExKind (res);
8558 exkind a2 = sRef_getExKind (other);
8560 if (a1 == a2 || a2 == XO_UNKNOWN)
8564 else if (a1 == XO_UNKNOWN)
8566 res->expinfo = stateInfo_update (res->expinfo, other->expinfo);
8571 res->expkind = XO_OBSERVER;
8576 ** Currently, this is a very ad hoc implementation, with lots of fixes to
8577 ** make real code work okay. I need to come up with some more general
8578 ** rules or principles here.
8582 sRef_combineAliasKindsError (/*@notnull@*/ sRef res,
8583 /*@notnull@*/ sRef other,
8584 clause cl, fileloc loc)
8586 bool hasError = FALSE;
8587 alkind ares = sRef_getAliasKind (res);
8588 alkind aother = sRef_getAliasKind (other);
8590 sRef_checkMutable (res);
8592 if (alkind_isDependent (ares))
8594 if (aother == AK_KEPT)
8596 res->aliasinfo = stateInfo_update (res->aliasinfo, other->aliasinfo);
8597 res->aliaskind = AK_KEPT;
8601 if (aother == AK_LOCAL || aother == AK_STATIC
8602 || alkind_isTemp (aother))
8604 DPRINTF (("Setting dependent: %s", sRef_unparseFull (res)));
8605 res->aliaskind = AK_DEPENDENT;
8609 else if (alkind_isDependent (aother))
8611 if (ares == AK_KEPT)
8613 res->aliaskind = AK_KEPT;
8617 if (ares == AK_LOCAL || ares == AK_STATIC || alkind_isTemp (ares))
8619 DPRINTF (("Setting dependent: %s", sRef_unparseFull (res)));
8620 res->aliasinfo = stateInfo_update (res->aliasinfo, other->aliasinfo);
8621 res->aliaskind = AK_DEPENDENT;
8625 else if ((ares == AK_LOCAL || ares == AK_UNIQUE
8626 || ares == AK_STATIC || alkind_isTemp (ares))
8627 && sRef_isFresh (other))
8630 ** cases like: if (s == NULL) s = malloc...;
8631 ** don't generate errors
8634 if (usymtab_isAltDefinitelyNullDeep (res))
8636 res->aliaskind = ares;
8643 else if ((aother == AK_LOCAL || aother == AK_UNIQUE
8644 || aother == AK_STATIC || alkind_isTemp (aother))
8645 && sRef_isFresh (res))
8648 ** cases like: if (s == NULL) s = malloc...;
8649 ** don't generate errors
8652 if (usymtab_isDefinitelyNullDeep (other))
8654 res->aliasinfo = stateInfo_update (res->aliasinfo, other->aliasinfo);
8655 res->aliaskind = aother;
8662 else if (ares == AK_NEWREF && aother == AK_REFCOUNTED
8663 && sRef_isConst (other))
8665 res->aliaskind = AK_NEWREF;
8667 else if (aother == AK_NEWREF && ares == AK_REFCOUNTED
8668 && sRef_isConst (res))
8670 res->aliasinfo = stateInfo_update (res->aliasinfo, other->aliasinfo);
8671 res->aliaskind = AK_NEWREF;
8673 else if (sRef_isLocalVar (res)
8674 && ((ares == AK_KEPT && aother == AK_LOCAL)
8675 || (aother == AK_KEPT && ares == AK_LOCAL)))
8677 res->aliaskind = AK_KEPT;
8686 if (sRef_isThroughArrayFetch (res))
8689 (FLG_BRANCHSTATE, FLG_STRICTBRANCHSTATE,
8691 ("Clauses exit with %q possibly referencing %s storage %s, "
8694 alkind_unparse (aother),
8695 clause_nameTaken (cl),
8696 alkind_unparse (ares),
8697 clause_nameAlternate (cl)),
8700 sRef_showAliasInfo (res);
8701 sRef_showAliasInfo (other);
8702 res->aliaskind = AK_ERROR;
8706 if (ares == AK_KEPT || aother == AK_KEPT)
8708 sRef_maybeKill (res, loc);
8716 message ("Clauses exit with %q referencing %s storage %s, "
8719 alkind_unparse (aother),
8720 clause_nameTaken (cl),
8721 alkind_unparse (ares),
8722 clause_nameAlternate (cl)),
8725 sRef_showAliasInfo (res);
8726 sRef_showAliasInfo (other);
8728 res->aliaskind = AK_ERROR;
8732 res->aliaskind = (sRef_isLocalVar (res) ? AK_LOCAL : AK_UNKNOWN);
8737 sRef_combineAliasKinds (/*@notnull@*/ sRef res, /*@notnull@*/ sRef other,
8738 clause cl, fileloc loc)
8740 alkind ares = sRef_getAliasKind (res);
8741 alkind aother = sRef_getAliasKind (other);
8743 sRef_checkMutable (res);
8745 if (alkind_equal (ares, aother)
8746 || aother == AK_UNKNOWN
8747 || aother == AK_ERROR)
8749 ; /* keep current state */
8751 else if (sRef_isDead (res) || sRef_isDead (other))
8753 /* dead error reported (or storage is dead) */
8754 res ->aliaskind = AK_ERROR;
8756 else if (ares == AK_UNKNOWN || ares == AK_ERROR
8757 || sRef_isStateUndefined (res))
8759 res->aliasinfo = stateInfo_update (res->aliasinfo, other->aliasinfo);
8760 res->aliaskind = aother;
8762 else if (sRef_isStateUndefined (other))
8766 else if (((ares == AK_UNIQUE || alkind_isTemp (ares))
8767 && aother == AK_LOCAL)
8768 || ((aother == AK_UNIQUE || alkind_isTemp (aother))
8769 && ares == AK_LOCAL))
8771 if (ares != AK_LOCAL)
8773 res->aliasinfo = stateInfo_update (res->aliasinfo, other->aliasinfo);
8776 res->aliaskind = AK_LOCAL;
8778 else if ((ares == AK_OWNED && aother == AK_FRESH)
8779 || (aother == AK_OWNED && ares == AK_FRESH))
8781 if (ares != AK_FRESH)
8783 res->aliasinfo = stateInfo_update (res->aliasinfo, other->aliasinfo);
8786 res->aliaskind = AK_FRESH;
8788 else if ((ares == AK_KEEP && aother == AK_FRESH) ||
8789 (aother == AK_KEEP && ares == AK_FRESH))
8791 if (ares != AK_KEEP)
8793 res->aliasinfo = stateInfo_update (res->aliasinfo, other->aliasinfo);
8796 res->aliaskind = AK_KEEP;
8798 else if ((ares == AK_LOCAL && aother == AK_STACK) ||
8799 (aother == AK_LOCAL && ares == AK_STACK))
8801 if (ares != AK_STACK)
8803 res->aliasinfo = stateInfo_update (res->aliasinfo, other->aliasinfo);
8806 res->aliaskind = AK_STACK;
8808 else if ((ares == AK_LOCAL
8809 && (aother == AK_OWNED && sRef_isLocalVar (other)))
8810 || (aother == AK_LOCAL
8811 && (ares == AK_OWNED && sRef_isLocalVar (res))))
8813 if (ares != AK_LOCAL)
8815 res->aliasinfo = stateInfo_update (res->aliasinfo, other->aliasinfo);
8818 res->aliaskind = AK_LOCAL;
8820 else if ((ares == AK_FRESH && alkind_isOnly (aother))
8821 || (aother == AK_FRESH && alkind_isOnly (ares)))
8823 res->aliaskind = AK_FRESH;
8825 else if ((aother == AK_FRESH && sRef_definitelyNull (res))
8826 || (ares == AK_FRESH && sRef_definitelyNull (other)))
8828 if (ares != AK_FRESH)
8830 res->aliasinfo = stateInfo_update (res->aliasinfo, other->aliasinfo);
8831 res->aliaskind = AK_FRESH;
8834 else if ((sRef_isFresh (res) && sRef_isConst (other))
8835 || (sRef_isFresh (other) && sRef_isConst (res)))
8838 ** for NULL constantants
8842 if (!sRef_isFresh (res))
8844 res->aliasinfo = stateInfo_update (res->aliasinfo, other->aliasinfo);
8847 res->aliaskind = AK_FRESH;
8849 else if ((alkind_isStatic (aother) && sRef_isConst (res))
8850 || (alkind_isStatic (ares) && sRef_isConst (other)))
8852 if (!alkind_isStatic (ares))
8854 res->aliasinfo = stateInfo_update (res->aliasinfo, other->aliasinfo);
8855 res->aliaskind = AK_STATIC;
8860 sRef_combineAliasKindsError (res, other, cl, loc);
8864 static void sRef_combineDefState (/*@notnull@*/ sRef res,
8865 /*@notnull@*/ sRef other)
8867 sstate s1 = res->defstate;
8868 sstate s2 = other->defstate;
8871 sRef_checkMutable (res);
8873 if (s1 == s2 || s2 == SS_UNKNOWN)
8877 else if (s1 == SS_UNKNOWN)
8886 if (s2 == SS_DEFINED)
8892 llcontbuglit ("ssfixed: not implemented");
8901 flip = (s2 != SS_DEFINED);
8919 res->definfo = stateInfo_update (res->definfo, other->definfo);
8924 extern /*@notnull@*/ sRef sRef_getConjA (sRef s)
8927 llassert (sRef_isConj (s));
8929 ret = s->info->conj->a;
8930 llassert (ret != NULL);
8934 extern /*@notnull@*/ sRef sRef_getConjB (sRef s)
8937 llassert (sRef_isConj (s));
8939 ret = s->info->conj->b;
8940 llassert (ret != NULL);
8944 extern /*@exposed@*/ sRef sRef_makeArrow (sRef s, /*@dependent@*/ cstring f)
8949 p = sRef_makePointer (s);
8950 ret = sRef_makeField (p, f);
8954 extern /*@exposed@*/ sRef sRef_buildArrow (sRef s, cstring f)
8959 p = sRef_buildPointer (s);
8960 ret = sRef_buildField (p, f);
8965 static /*@null@*/ sinfo sinfo_copy (/*@notnull@*/ sRef s)
8972 ret = (sinfo) dmalloc (sizeof (*ret));
8973 ret->cvar = (cref) dmalloc (sizeof (*ret->cvar));
8974 ret->cvar->lexlevel = s->info->cvar->lexlevel;
8975 ret->cvar->index = s->info->cvar->index;
8979 ret = (sinfo) dmalloc (sizeof (*ret));
8980 ret->paramno = s->info->paramno;
8981 llassert (ret->paramno >= -1);
8985 ret = (sinfo) dmalloc (sizeof (*ret));
8986 ret->arrayfetch = (ainfo) dmalloc (sizeof (*ret->arrayfetch));
8987 ret->arrayfetch->indknown = s->info->arrayfetch->indknown;
8988 ret->arrayfetch->ind = s->info->arrayfetch->ind;
8989 ret->arrayfetch->arr = s->info->arrayfetch->arr; /* sRef_copy (s->info->arrayfetch->arr); */ /*@i32@*/
8993 ret = (sinfo) dmalloc (sizeof (*ret));
8994 ret->field = (fldinfo) dmalloc (sizeof (*ret->field));
8995 ret->field->rec = s->info->field->rec; /* sRef_copy (s->info->field->rec); */ /*@i32@*/
8996 ret->field->field = s->info->field->field;
9000 ret = (sinfo) dmalloc (sizeof (*ret));
9001 ret->object = s->info->object;
9008 ret = (sinfo) dmalloc (sizeof (*ret));
9009 ret->ref = s->info->ref; /* Ref_copy (s->info->ref); */
9013 ret = (sinfo) dmalloc (sizeof (*ret));
9014 ret->conj = (cjinfo) dmalloc (sizeof (*ret->conj));
9015 ret->conj->a = s->info->conj->a; /* sRef_copy (s->info->conj->a); */
9016 ret->conj->b = s->info->conj->b; /* sRef_copy (s->info->conj->b);*/
9019 ret = (sinfo) dmalloc (sizeof (*ret));
9020 ret->spec = s->info->spec;
9022 case SK_UNCONSTRAINED:
9024 ret = (sinfo) dmalloc (sizeof (*ret));
9025 ret->fname = s->info->fname;
9031 llassertprint (s->info == NULL, ("s = %s", sRef_unparse (s)));
9039 static /*@null@*/ sinfo sinfo_fullCopy (/*@notnull@*/ sRef s)
9044 ** Since its a full copy, only storage is assigned
9045 ** to dependent fields.
9052 ret = (sinfo) dmalloc (sizeof (*ret));
9053 ret->cvar = (cref) dmalloc (sizeof (*ret->cvar));
9054 ret->cvar->lexlevel = s->info->cvar->lexlevel;
9055 ret->cvar->index = s->info->cvar->index;
9059 ret = (sinfo) dmalloc (sizeof (*ret));
9060 ret->paramno = s->info->paramno;
9061 llassert (ret->paramno >= -1);
9065 ret = (sinfo) dmalloc (sizeof (*ret));
9066 ret->arrayfetch = (ainfo) dmalloc (sizeof (*ret->arrayfetch));
9067 ret->arrayfetch->indknown = s->info->arrayfetch->indknown;
9068 ret->arrayfetch->ind = s->info->arrayfetch->ind;
9069 ret->arrayfetch->arr = sRef_saveCopy (s->info->arrayfetch->arr);
9073 ret = (sinfo) dmalloc (sizeof (*ret));
9074 ret->field = (fldinfo) dmalloc (sizeof (*ret->field));
9075 ret->field->rec = sRef_saveCopy (s->info->field->rec);
9076 ret->field->field = s->info->field->field;
9080 ret = (sinfo) dmalloc (sizeof (*ret));
9081 ret->object = s->info->object;
9088 ret = (sinfo) dmalloc (sizeof (*ret));
9089 ret->ref = sRef_saveCopy (s->info->ref);
9093 ret = (sinfo) dmalloc (sizeof (*ret));
9094 ret->conj = (cjinfo) dmalloc (sizeof (*ret->conj));
9095 ret->conj->a = sRef_saveCopy (s->info->conj->a);
9096 ret->conj->b = sRef_saveCopy (s->info->conj->b);
9099 ret = (sinfo) dmalloc (sizeof (*ret));
9100 ret->spec = s->info->spec;
9103 case SK_UNCONSTRAINED:
9104 ret = (sinfo) dmalloc (sizeof (*ret));
9105 ret->fname = s->info->fname;
9111 llassert (s->info == NULL);
9121 sinfo_update (/*@notnull@*/ /*@exposed@*/ sRef res,
9122 /*@notnull@*/ /*@exposed@*/ sRef other)
9124 llassert (res->kind == other->kind);
9129 res->info->cvar->lexlevel = other->info->cvar->lexlevel;
9130 res->info->cvar->index = other->info->cvar->index;
9134 res->info->paramno = other->info->paramno;
9135 llassert (res->info->paramno >= -1);
9139 res->info->arrayfetch->indknown = other->info->arrayfetch->indknown;
9140 res->info->arrayfetch->ind = other->info->arrayfetch->ind;
9141 res->info->arrayfetch->arr = other->info->arrayfetch->arr;
9145 res->info->field->rec = other->info->field->rec;
9146 res->info->field->field = other->info->field->field;
9150 res->info->object = other->info->object;
9157 res->info->ref = other->info->ref;
9161 res->info->conj->a = other->info->conj->a;
9162 res->info->conj->b = other->info->conj->b;
9166 res->info->spec = other->info->spec;
9170 case SK_UNCONSTRAINED:
9171 res->info->fname = other->info->fname;
9178 llassert (res->info == NULL);
9183 static void sinfo_free (/*@special@*/ /*@temp@*/ /*@notnull@*/ sRef s)
9184 /*@uses s->kind, s->info@*/
9185 /*@releases s->info@*/
9190 DPRINTF (("Free sinfo: [%p]", s->info->cvar));
9191 sfree (s->info->cvar);
9198 DPRINTF (("Free sinfo: [%p]", s->info->arrayfetch));
9199 sfree (s->info->arrayfetch);
9203 DPRINTF (("Free sinfo: [%p]", s->info->field));
9204 sfree (s->info->field);
9213 case SK_EXTERNAL: /*@i32 is copy now! */
9217 DPRINTF (("Free sinfo: [%p]", s->info->conj));
9218 sfree (s->info->conj);
9221 case SK_UNCONSTRAINED:
9231 if (s->info != NULL) {
9232 DPRINTF (("Free sinfo: [%p]", s->info));
9238 bool sRef_isNSLocalVar (sRef s)
9240 if (sRef_isLocalVar (s))
9242 uentry ue = sRef_getUentry (s);
9244 return (!uentry_isStatic (ue));
9252 bool sRef_isLocalVar (sRef s)
9254 if (sRef_isValid(s))
9256 return (s->kind == SK_CVAR
9257 && (s->info->cvar->lexlevel > fileScope));
9263 bool sRef_isRealLocalVar (sRef s)
9265 if (sRef_isValid(s))
9267 if (s->kind == SK_CVAR)
9269 if (s->info->cvar->lexlevel == functionScope)
9271 uentry ue = sRef_getUentry (s);
9273 if (uentry_isAnyParam (ue)
9274 || uentry_isRefParam (ue))
9285 return (s->info->cvar->lexlevel > functionScope);
9293 bool sRef_isLocalParamVar (sRef s)
9295 if (sRef_isValid(s))
9297 return (s->kind == SK_PARAM
9298 || (s->kind == SK_CVAR
9299 && (s->info->cvar->lexlevel > fileScope)));
9305 static speckind speckind_fromInt (int i)
9308 llassert (i >= SR_NOTHING && i <= SR_SYSTEM);
9311 return ((speckind) i);
9315 static void sRef_updateNullState (sRef res, sRef other)
9318 res->nullstate = other->nullstate;
9319 res->nullinfo = stateInfo_update (res->nullinfo, other->nullinfo);
9322 void sRef_combineNullState (/*@notnull@*/ sRef res, /*@notnull@*/ sRef other)
9324 nstate n1 = sRef_getNullState (res);
9325 nstate n2 = sRef_getNullState (other);
9329 if (n1 == n2 || n2 == NS_UNKNOWN)
9335 /* note: n2 is not unknown or defnull */
9339 case NS_ERROR: nn = NS_ERROR; break;
9340 case NS_UNKNOWN: flip = TRUE; nn = n2; break;
9341 case NS_POSNULL: break;
9342 case NS_DEFNULL: nn = NS_POSNULL; break;
9343 case NS_RELNULL: break;
9345 if (n2 == NS_MNOTNULL)
9356 if (n2 == NS_NOTNULL)
9375 res->nullinfo = stateInfo_update (res->nullinfo, other->nullinfo);
9378 res->nullstate = nn;
9381 cstring sRef_nullMessage (sRef s)
9383 llassert (sRef_isValid (s));
9385 switch (sRef_getNullState (s))
9389 return (cstring_makeLiteralTemp ("null"));
9391 return (cstring_makeLiteralTemp ("possibly null"));
9396 /*@observer@*/ cstring sRef_ntMessage (sRef s)
9398 llassert (sRef_isValid (s));
9400 switch (s->nullstate)
9404 return (cstring_makeLiteralTemp ("not nullterminated"));
9406 return (cstring_makeLiteralTemp ("possibly non-nullterminated"));
9413 sRef sRef_fixResultType (/*@returned@*/ sRef s, ctype typ, uentry ue)
9415 sRef tmp = sRef_undefined;
9418 llassert (sRef_isValid (s));
9429 tmp = sRef_fixResultType (s->info->arrayfetch->arr, typ, ue);
9431 ct = ctype_realType (sRef_getType (tmp));
9434 if (ctype_isKnown (ct))
9436 if (ctype_isAP (ct))
9445 ("Special clause indexes non-array (%t): *%q",
9446 ct, sRef_unparse (s->info->arrayfetch->arr)),
9447 uentry_whereLast (ue));
9451 tmp = sRef_fixResultType (s->info->arrayfetch->arr, typ, ue);
9453 if (s->info->arrayfetch->indknown)
9455 ret = sRef_makeArrayFetchKnown (tmp, s->info->arrayfetch->ind);
9459 ret = sRef_makeArrayFetch (tmp);
9465 sRef rec = sRef_fixResultType (s->info->field->rec, typ, ue);
9466 ctype ct = ctype_realType (sRef_getType (rec));
9468 if (ctype_isKnown (ct))
9470 if (ctype_isSU (ct))
9472 if (uentry_isValid (uentryList_lookupField (ctype_getFields (ct),
9473 s->info->field->field)))
9482 ("Special clause accesses non-existent field of result: %q.%s",
9483 sRef_unparse (rec), s->info->field->field),
9484 uentry_whereLast (ue));
9492 ("Special clause accesses field of non-struct or union result (%t): %q.%s",
9493 ct, sRef_unparse (rec), s->info->field->field),
9494 uentry_whereLast (ue));
9498 ret = sRef_makeField (tmp, s->info->field->field);
9504 tmp = sRef_fixResultType (s->info->ref, typ, ue);
9506 ct = ctype_realType (sRef_getType (tmp));
9508 if (ctype_isKnown (ct))
9510 if (ctype_isAP (ct))
9519 ("Special clause dereferences non-pointer (%t): *%q",
9520 ct, sRef_unparse (s->info->ref)),
9521 uentry_whereLast (ue));
9525 ret = sRef_makePointer (tmp);
9532 ("Special clause uses & operator (not allowed): &%q", sRef_unparse (s->info->ref)),
9533 uentry_whereLast (ue));
9542 bool sRef_isOnly (sRef s)
9544 return (sRef_isValid(s) && alkind_isOnly (s->aliaskind));
9547 bool sRef_isDependent (sRef s)
9549 return (sRef_isValid(s) && alkind_isDependent (s->aliaskind));
9552 bool sRef_isOwned (sRef s)
9554 return (sRef_isValid (s) && (s->aliaskind == AK_OWNED));
9557 bool sRef_isKeep (sRef s)
9559 return (sRef_isValid (s) && (s->aliaskind == AK_KEEP));
9562 bool sRef_isTemp (sRef s)
9564 return (sRef_isValid (s) && alkind_isTemp (s->aliaskind));
9567 bool sRef_isLocalState (sRef s)
9569 return (sRef_isValid (s) && (s->aliaskind == AK_LOCAL));
9572 bool sRef_isUnique (sRef s)
9574 return (sRef_isValid (s) && (s->aliaskind == AK_UNIQUE));
9577 bool sRef_isShared (sRef s)
9579 return (sRef_isValid (s) && (s->aliaskind == AK_SHARED));
9582 bool sRef_isExposed (sRef s)
9584 return (sRef_isValid (s) && (s->expkind == XO_EXPOSED));
9587 bool sRef_isObserver (sRef s)
9589 return (sRef_isValid (s) && (s->expkind == XO_OBSERVER));
9592 bool sRef_isFresh (sRef s)
9594 return (sRef_isValid (s) && (s->aliaskind == AK_FRESH));
9597 bool sRef_isDefinitelyNull (sRef s)
9599 return (sRef_isValid (s) && (sRef_getNullState (s) == NS_DEFNULL
9600 || sRef_getNullState (s) == NS_CONSTNULL));
9603 bool sRef_isAllocated (sRef s)
9605 return (sRef_isValid (s) && (s->defstate == SS_ALLOCATED));
9608 bool sRef_isStack (sRef s)
9610 return (sRef_isValid (s) && (s->aliaskind == AK_STACK));
9613 bool sRef_isNotNull (sRef s)
9615 return (sRef_isValid(s) && (sRef_getNullState (s) == NS_MNOTNULL
9616 || sRef_getNullState (s) == NS_NOTNULL));
9619 alkind sRef_getAliasKind (sRef s)
9621 if (sRef_isValid(s)) {
9622 llassert (alkind_isValid (s->aliaskind));
9623 return s->aliaskind;
9629 nstate sRef_getNullState (sRef s)
9631 if (sRef_isValid (s)) {
9632 llassert (nstate_isValid (s->nullstate));
9633 return s->nullstate;
9639 void sRef_reflectAnnotation (sRef s, annotationInfo a, fileloc loc)
9641 if (sRef_isValid (s))
9643 if (!valueTable_isDefined (s->state))
9645 s->state = valueTable_create (1);
9646 valueTable_insert (s->state,
9647 cstring_copy (metaStateInfo_getName (annotationInfo_getState (a))),
9648 stateValue_create (annotationInfo_getValue (a), stateInfo_makeLoc (loc)));
9652 DPRINTF (("reflect loc: %s", fileloc_unparse (loc)));
9655 metaStateInfo_getName (annotationInfo_getState (a)),
9656 stateValue_create (annotationInfo_getValue (a), stateInfo_makeLoc (loc)));
9657 DPRINTF (("state info: %s", stateInfo_unparse (stateInfo_makeLoc (loc))));
9658 DPRINTF (("sref: %s", sRef_unparse (s)));
9659 DPRINTF (("sref: %s", sRef_unparseFull (s)));
9664 void sRef_setMetaStateValueComplete (sRef s, cstring key, int value, fileloc loc)
9666 sRefSet aliases = usymtab_allAliases (s);
9668 sRef_setMetaStateValue (s, key, value, loc);
9670 sRefSet_realElements (aliases, current)
9672 if (sRef_isValid (current))
9674 current = sRef_updateSref (current);
9675 sRef_setMetaStateValue (current, key, value, loc);
9677 } end_sRefSet_realElements ;
9679 sRefSet_free (aliases);
9682 void sRef_setMetaStateValue (sRef s, cstring key, int value, fileloc loc)
9684 sRef_checkMutable (s);
9686 if (sRef_isValid (s))
9688 if (!valueTable_isDefined (s->state))
9690 DPRINTF (("inserting state: %s: %s %d", sRef_unparse (s), key, value));
9691 s->state = valueTable_create (1);
9692 valueTable_insert (s->state, cstring_copy (key),
9693 stateValue_create (value, stateInfo_makeLoc (loc)));
9697 DPRINTF (("Updating state: %s: %s %d / %s", sRef_unparse (s), key, value,
9698 fileloc_unparse (loc)));
9699 if (valueTable_contains (s->state, key))
9702 (s->state, key, stateValue_create (value, stateInfo_makeLoc (loc)));
9707 (s->state, cstring_copy (key), stateValue_create (value, stateInfo_makeLoc (loc)));
9710 DPRINTF (("After: %s", sRef_unparseFull (s)));
9715 bool sRef_checkMetaStateValue (sRef s, cstring key, int value)
9717 if (sRef_isValid (s))
9719 if (valueTable_isDefined (s->state))
9723 DPRINTF (("check state: %s: %s %d", sRef_unparse (s), key, value));
9725 val = valueTable_lookup (s->state, key);
9726 llassert (stateValue_isDefined (val));
9727 return (stateValue_isError (val)
9728 || stateValue_getValue (val) == value);
9741 /*@observer@*/ stateValue sRef_getMetaStateValue (sRef s, cstring key)
9743 if (sRef_isValid (s))
9745 if (valueTable_isDefined (s->state))
9749 val = valueTable_lookup (s->state, key);
9750 /* Okay if its not defined, just returns stateValue_undefined */
9755 return stateValue_undefined;
9760 return stateValue_undefined;
9764 /*@observer@*/ valueTable sRef_getValueTable (sRef s)
9766 DPRINTF (("Get value table: %s", sRef_unparse (s)));
9768 if (sRef_isValid (s))
9770 llassert (sRef_isValid (s));
9771 DPRINTF (("Value table: %s", valueTable_unparse (s->state)));
9776 DPRINTF (("No value table!"));
9777 return valueTable_undefined;
9781 bool sRef_makeStateSpecial (sRef s)
9784 ** Default defined state can be made special.
9787 llassert (sRef_isValid (s)); /*@i523 why doesn't null-checking work!??? */
9789 if (s->defstate == SS_UNKNOWN || s->defstate == SS_DEFINED || s->defstate == SS_SPECIAL)
9791 /* s->aliaskind = AK_IMPTEMP; */ /* evans 2001-07-23 shouldn't effect alias state */
9792 s->defstate = SS_SPECIAL;
9793 DPRINTF (("Made special: %s", sRef_unparseFull (s)));
9798 /* s->aliaskind = AK_IMPTEMP; */
9799 s->defstate = SS_SPECIAL;
9804 void sRef_markImmutable (sRef s)
9806 if (sRef_isValid (s))
9808 DPRINTF (("Mark immutable: %s", sRef_unparseFull (s)));
9813 bool sRef_definitelyNullContext (sRef s)
9815 return (sRef_definitelyNull (s)
9816 || usymtab_isDefinitelyNullDeep (s));
9819 bool sRef_definitelyNullAltContext (sRef s)
9821 return (sRef_definitelyNull (s)
9822 || usymtab_isAltDefinitelyNullDeep (s));
9826 /* start modifications */
9827 struct s_bbufinfo sRef_getNullTerminatedState (sRef p_s) {
9828 struct s_bbufinfo BUFSTATE_UNKNOWN;
9829 BUFSTATE_UNKNOWN.bufstate = BB_NOTNULLTERMINATED;
9830 BUFSTATE_UNKNOWN.size = 0;
9831 BUFSTATE_UNKNOWN.len = 0;
9833 if (sRef_isValid(p_s))
9834 return p_s->bufinfo;
9835 return BUFSTATE_UNKNOWN;
9838 void sRef_setNullTerminatedState(sRef p_s) {
9839 if(sRef_isValid (p_s)) {
9840 p_s->bufinfo.bufstate = BB_NULLTERMINATED;
9842 llfatalbug( message("sRef_setNT passed a invalid sRef\n"));
9847 void sRef_setPossiblyNullTerminatedState(sRef p_s) {
9848 if( sRef_isValid (p_s)) {
9849 p_s->bufinfo.bufstate = BB_POSSIBLYNULLTERMINATED;
9851 llfatalbug( message("sRef_setPossNT passed a invalid sRef\n"));
9855 void sRef_setNotNullTerminatedState(sRef p_s) {
9856 if( sRef_isValid (p_s)) {
9857 p_s->bufinfo.bufstate = BB_NOTNULLTERMINATED;
9859 llfatalbug( message("sRef_unsetNT passed a invalid sRef\n"));
9863 void sRef_setLen(sRef p_s, int len) {
9864 if( sRef_isValid (p_s) && sRef_isNullTerminated(p_s)) {
9865 p_s->bufinfo.len = len;
9867 llfatalbug( message("sRef_setLen passed a invalid sRef\n"));
9872 void sRef_setSize(sRef p_s, int size) {
9873 if( sRef_isValid(p_s)) {
9874 p_s->bufinfo.size = size;
9876 llfatalbug( message("sRef_setSize passed a invalid sRef\n"));
9880 void sRef_resetLen(sRef p_s) {
9881 if (sRef_isValid (p_s)) {
9882 p_s->bufinfo.len = 0;
9884 llfatalbug (message ("sRef_setLen passed an invalid sRef\n"));
9888 /*drl7x 11/28/2000 */
9890 bool sRef_isFixedArray (sRef p_s) /*@*/ {
9892 c = sRef_getType (p_s);
9893 return ( ctype_isFixedArray (c) );
9896 long int sRef_getArraySize (sRef p_s) /*@*/ {
9898 llassert (sRef_isFixedArray(p_s) );
9899 DPRINTF (( message ("sRef_getArraySize getting array size for %s", sRef_unparse(p_s) ) ));
9901 c = sRef_getType (p_s);
9903 return (ctype_getArraySize (c) );
9906 void sRef_setValue (sRef s, multiVal val)
9908 llassert (sRef_isValid (s));
9909 multiVal_free (s->val);
9913 bool sRef_hasValue (sRef s)
9915 return (sRef_isValid (s)
9916 && multiVal_isDefined (s->val));
9919 multiVal sRef_getValue (sRef s)
9921 if (sRef_isValid (s))
9926 return multiVal_undefined;