2 ** Splint - annotation-assisted static program checker
3 ** Copyright (C) 1994-2003 University of Virginia,
4 ** Massachusetts Institute of Technology
6 ** This program is free software; you can redistribute it and/or modify it
7 ** under the terms of the GNU General Public License as published by the
8 ** Free Software Foundation; either version 2 of the License, or (at your
9 ** option) any later version.
11 ** This program is distributed in the hope that it will be useful, but
12 ** WITHOUT ANY WARRANTY; without even the implied warranty of
13 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 ** General Public License for more details.
16 ** The GNU General Public License is available from http://www.gnu.org/ or
17 ** the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
18 ** MA 02111-1307, USA.
20 ** For information on splint: info@splint.org
21 ** To report a bug: splint-bug@splint.org
22 ** For more information: http://www.splint.org
27 ** Lexically scoped symbol table.
29 ** Unlike a normal symbol table, this table splits to reflect branches.
31 ** This is necessary since symbol table entries also reflect
32 ** some state information, like initialization, that may be
33 ** different on different branches.
35 ** For each control structure we split:
37 ** { } - a normal scope (no control) US_NORMAL
39 ** if <pred> { } - US_TBRANCH true branch
40 ** while <pred> { } US_FBRANCH else branch
42 ** switch <pred> { } - US_SWITCH
44 ** case x: - case scope US_CBRANCH
45 ** Should be kept in a separate table, because of
49 # include "splintMacros.nf"
51 # include "structNames.h"
52 # include "exprChecks.h"
53 # include "transferChecks.h"
55 /* Needed to install macros when loading libraries */
58 # include "cpperror.h"
62 ** Keep track of type definitions inside a function.
65 static uentryList functypes = uentryList_undefined;
67 static bool dbgfree = FALSE;
68 static bool dbgload = TRUE;
73 ** Hack to prevent shadow errors from appearing when function parameters
74 ** are entered into a new scope.
77 static bool noshadowerror = FALSE;
80 ** Constraint: static variables can live in 1 or > 2.
82 ** except for tags. All tags must be at the global level.
83 ** Static tags are handled in a kludgey way.
87 ** utab is the universal symbol table
88 ** globtab is the global environment of utab
89 ** oldtab is needed for conversions in dumping (after sorting the table)
91 ** there can be only one usymtab!
94 static /*@checkedstrict@*/ /*@owned@*/ /*@notnull@*/ usymtab utab;
96 /* Reachable environments from from utab */
97 static /*@checkedstrict@*/ /*@notnull@*/ /*@dependent@*/ usymtab globtab;
98 static /*@checkedstrict@*/ /*@dependent@*/ usymtab filetab;
100 /* Used for sorting for dumpage. */
101 static /*@checkedstrict@*/ /*@owned@*/ usymtab oldtab;
103 static int usymtab_lexicalLevel (void) /*@globals utab@*/ ;
104 static bool usymtab_isAltDefinitelyNull (sRef p_s) /*@globals utab@*/ ;
105 static void refTable_free (/*@only@*/ /*@null@*/ refTable p_x, int p_nentries);
106 static ctype usymtab_suFieldsType (uentryList p_f, bool p_isStruct) /*@globals globtab@*/ ;
108 static void usymtab_freeAux (/*@only@*/ usymtab p_u)
109 /*@globals globtab, utab, filetab@*/
112 extern int usymtab_getCurrentDepth (void) /*@globals utab@*/
114 return utab->lexlevel;
118 usymtab_freeLevel (/*@notnull@*/ /*@only@*/ usymtab p_u)
119 /*@globals globtab, utab, filetab@*/ /*@modifies p_u@*/ ;
121 static bool usymtab_isDefinitelyNullAux (sRef p_s) /*@globals utab@*/ ;
122 static /*@only@*/ cstring usymtab_unparseStackTab (usymtab p_t);
123 static /*@exposed@*/ /*@dependent@*/ uentry
124 usymtab_getRefTab (/*@notnull@*/ usymtab p_u, int p_level, usymId p_index);
127 /* These are not used anymore... */
128 static /*@unused@*/ /*@only@*/ cstring
129 usymtab_unparseLocalAux (/*@notnull@*/ usymtab p_s);
130 static /*@unused@*/ /*@only@*/ cstring
131 usymtab_unparseLocalList (/*@notnull@*/ usymtab p_s);
134 static /*@only@*/ cstring usymtab_typeName (/*@notnull@*/ usymtab p_t);
135 static void usymtab_handleParams (void)
136 /*@globals utab, globtab, filetab@*/
137 /*@modifies utab@*/ ;
139 static /*@exposed@*/ /*@dependent@*/ uentry
140 usymtab_addRefEntry (/*@notnull@*/ usymtab p_s, cstring p_k);
141 static /*@exposed@*/ /*@dependent@*/ usymtab
142 usymtab_dropEnv (/*@notnull@*/ usymtab p_s);
143 static /*@exposed@*/ /*@dependent@*/ uentry
144 usymtab_getRefNoisy (/*@notnull@*/ usymtab p_s, int p_level, usymId p_index);
146 static /*@exposed@*/ /*@dependent@*/ uentry
147 usymtab_lookupQuietAux (usymtab p_s, cstring p_k, bool p_noalt);
149 static /*@exposed@*/ /*@dependent@*/ uentry
150 usymtab_lookupQuiet (usymtab p_s, cstring p_k);
152 static /*@exposed@*/ /*@dependent@*/ uentry
153 usymtab_lookupQuietNoAlt (usymtab p_s, cstring p_k);
155 static void usymtab_printAllAux (usymtab p_s) /*@modifies g_warningstream@*/ ;
157 /*@function bool usymtab_indexFound (usymId) @*/
158 # define usymtab_indexFound(u) ((u) != usymId_notfound)
160 static usymId usymtab_getIndex (/*@notnull@*/ usymtab p_s, cstring p_k);
161 static /*@exposed@*/ uentry usymtab_fetchIndex (/*@notnull@*/ usymtab p_s, usymId p_ui);
162 static /*@exposed@*/ uentry usymtab_lookupAux (usymtab p_s, cstring p_k);
164 static /*@exposed@*/ /*@dependent@*/ /*@notnull@*/
165 usymtab usymtab_getFileTab (void) /*@globals filetab@*/ ;
167 static int refTable_lookup (/*@notnull@*/ usymtab p_ut, int p_level, usymId p_index);
168 static bool usymtab_mustBreak (usymtab p_s);
169 static bool usymtab_mustEscape (usymtab p_s);
171 static void recordFunctionType (uentry ue)
173 llassert (uentry_isDatatype (ue) || uentry_isAnyTag (ue)
174 || uentry_isEnumConstant (ue));
175 DPRINTF (("Function type: %s", uentry_unparseFull (ue)));
177 functypes = uentryList_add (functypes, ue);
181 static void clearFunctionTypes (void)
182 /*@modifies globtab@*/
184 uentryList_elements (functypes, el)
186 if (cstring_isDefined (uentry_rawName (el)))
188 if (cstringTable_isDefined (globtab->htable))
190 cstringTable_remove (globtab->htable, uentry_rawName (el));
193 uentry_setName (el, cstring_undefined);
197 llassert (uentry_isValid (el));
198 el->sref = sRef_undefined;
199 /*@noaccess uentry@*/
200 } end_uentryList_elements ;
202 uentryList_clear (functypes);
205 static /*@falsewhennull@*/ bool usymtab_isBranch (usymtab u)
207 return (usymtab_isDefined (u) &&
208 (u->kind == US_TBRANCH || u->kind == US_FBRANCH
209 || u->kind == US_CBRANCH || u->kind == US_SWITCH));
212 static bool usymtab_mustBreak (usymtab s)
214 llassert (s != GLOBAL_ENV);
215 return (s->mustBreak);
218 static bool usymtab_mustEscape (usymtab s)
220 llassert (s != GLOBAL_ENV);
221 return (exitkind_mustEscape (s->exitCode));
224 void usymtab_setMustBreak ()
227 llassert (utab != GLOBAL_ENV);
228 utab->mustBreak = TRUE;
231 void usymtab_setExitCode (exitkind ex)
234 llassert (utab != GLOBAL_ENV);
238 if (exitkind_mustEscape (ex))
240 utab->mustBreak = TRUE;
244 bool usymtab_isAltDefinitelyNullDeep (sRef s)
246 return (sRef_deepPred (usymtab_isAltDefinitelyNull, s));
249 static bool usymtab_isAltDefinitelyNull (sRef s)
257 llassert (utab->env != NULL);
259 /*@-mods@*/ /* These modifications are cancelled. */
260 utab->guards = utab->env->guards;
261 utab->env->guards = t;
264 llassert (usymtab_isDefined (utab));
265 res = usymtab_isDefinitelyNull (s);
268 ** This reports a spurious error. It is okay, because of
269 ** the nesting relationship of usymtab environments.
272 /*@-mods@*/ /* Cancelling modifications. */
273 /*@i1@*/ utab->env->guards = utab->guards;
274 /*@i1@*/ utab->guards = t;
280 static /*@notnull@*/ /*@special@*/ usymtab
281 usymtab_create (uskind kind, /*@keep@*/ usymtab env, bool nextlevel)
283 /*@post:isnull result->htable, result->guards, result->aliases@*/
285 usymtab t = (usymtab) dmalloc (sizeof (*t));
288 t->nspace = CBASESIZE;
289 t->entries = (uentry *) dmalloc (sizeof (*t->entries) * CBASESIZE);
291 /* We only use a reftable for branch-level symbol tables.
294 t->reftable = (nextlevel
296 : (refentry *) dmalloc (sizeof (*t->reftable) * CBASESIZE));
299 t->lexlevel = (env == GLOBAL_ENV ? 0 : env->lexlevel) + (nextlevel ? 1 : 0);
304 t->guards = guardSet_undefined;
305 t->aliases = aliasTable_undefined;
307 t->mustBreak = FALSE;
308 t->exitCode = XK_NEVERESCAPE;
310 DPRINTF (("Create usymtab [%p]", t));
318 static /*@only@*/ /*@notnull@*/ usymtab
319 usymtab_createRoot (void) /*@modifies nothing@*/
321 usymtab u = (usymtab) dmalloc (sizeof (*u));
324 u->nspace = CGLOBBASESIZE;
325 u->entries = (uentry *) dmalloc (sizeof (*u->entries) * CGLOBBASESIZE);
328 u->htable = cstringTable_create (CGLOBHASHSIZE);
331 u->guards = guardSet_new ();
332 u->aliases = aliasTable_new ();
334 u->mustBreak = FALSE;
335 u->exitCode = XK_NEVERESCAPE;
342 usymtab_initMod (void)
343 /*@globals undef utab, undef oldtab, undef globtab, undef filetab @*/
344 /*@modifies utab, globtab, filetab, oldtab @*/
346 utab = usymtab_createRoot ();
348 filetab = usymtab_undefined;
349 oldtab = usymtab_undefined;
353 usymtab_destroyMod (void) /*@modifies utab, globtab, filetab@*/ /*@globals killed utab@*/
355 DPRINTF (("Destroy usymtab [%p]: %d", utab, utab->nentries));
356 usymtab_freeAux (utab);
357 utab = usymtab_undefined;
362 usymtab_initGlobalMarker () /*@globals globtab@*/
364 if (uentry_isValid (usymtab_lookupAux (globtab, GLOBAL_MARKER_NAME)))
366 ; /* Already entered from load table. */
370 usymtab_addGlobalEntry (uentry_makeGlobalMarker ());
375 ** utab should be empty? (requires?)
377 ** Adds bool types to symbol table (these are built in for now)
378 ** Only do this is there is no library!
384 DPRINTF (("Init bool!"));
386 if (context_getFlag (FLG_NOLIB))
388 ctype boolt = ctype_bool;
389 /* evs 2000-07-24: bool is now treated as abstract (always) */
391 uentry boolentry = uentry_makeBoolDatatype (qual_createAbstract ());
392 usymtab_supGlobalEntry (boolentry);
393 context_addBoolAccess ();
396 ** We supply values 0 and 1 for the constants, so things like
397 ** while (TRUE) can be interpreted correctly.
400 usymtab_supGlobalEntry
401 (uentry_makeConstantValue (context_getFalseName (), boolt,
402 fileloc_getBuiltin (), FALSE,
403 multiVal_makeInt (0)));
405 usymtab_supGlobalEntry
406 (uentry_makeConstantValue (context_getTrueName (), boolt,
407 fileloc_getBuiltin (), FALSE,
408 multiVal_makeInt (1)));
417 usymtab_grow (/*@notnull@*/ usymtab s)
420 o_uentry *oldsyms = s->entries;
422 s->nspace = CBASESIZE;
423 s->entries = (uentry *) dmalloc (sizeof (*s->entries)
424 * (s->nentries + s->nspace));
426 for (i = 0; i < s->nentries; i++)
428 s->entries[i] = oldsyms[i];
433 if (s->reftable != NULL)
435 refTable oldRefs = s->reftable;
437 s->reftable = (refentry *) dmalloc (sizeof (*s->reftable)
438 * (s->nentries + CBASESIZE + 1));
440 for (i = 0; i < s->nentries; i++)
442 s->reftable[i] = oldRefs[i];
453 usymtab_addEntryQuiet (/*@notnull@*/ usymtab s, /*@keep@*/ uentry e)
455 if (!(s->lexlevel > fileScope || !sRef_modInFunction ()))
457 if (uentry_isDatatype (e)
458 || uentry_isFunction (e)
459 || uentry_isAnyTag (e)
460 || uentry_isEnumConstant (e)
461 || context_inMacro ())
464 ** Not a bug. Code like,
465 ** int f (void) { typedef int tint; ... }
469 /* was nothing here! */
470 /*@i@*/ e->sref = sRef_saveCopy (e->sref);
475 (cstring_makeLiteral ("Declaration outside function scope"));
477 llcontbug (message ("usymtab_addEntryQuiet: inconsistent state "
478 "(lexlevel = %d, modFunction = %s) adding: %q",
479 s->lexlevel, bool_unparse (sRef_modInFunction ()),
480 uentry_unparse (e)));
481 sRef_setGlobalScope ();
482 /* make sure the sRef is not bashed! */
483 /*@i@*/ e->sref = sRef_saveCopy (e->sref);
493 s->entries[s->nentries] = e;
496 if (s == globtab || s == filetab)
498 if (!fileloc_isLib (g_currentloc))
500 uentry_tallyAnnots (e, AN_UNKNOWN);
505 if (cstringTable_isDefined (s->htable))
507 cstringTable_insert (s->htable, cstring_copy (uentry_rawName (e)), s->nentries);
513 static /*@observer@*/ uentry /*@alt void@*/
514 usymtab_addEntryBase (/*@notnull@*/ usymtab s, /*@only@*/ uentry e)
517 ** In theory, we shouldn't need this test because it this is
518 ** only called when a library is being read, and it shouldn't
519 ** ever have a duplicate entry. In practice, its safer to
520 ** leave it in, though.
525 if (uentry_isValid (old = usymtab_lookupQuiet (s, uentry_rawName (e))))
527 DPRINTF (("Duplicate entry: %s", uentry_unparse (e)));
528 uentry_free (e); /* duplicate */
533 usymId thisentry = usymId_fromInt (s->nentries);
535 if (uentry_isVar (e))
538 (e, sRef_makeCvar (globScope, thisentry,
540 stateInfo_makeLoc (uentry_whereLast (e), SA_DECLARED)));
543 usymtab_addEntryQuiet (s, e);
549 static /*@observer@*/ uentry /*@alt void@*/
550 usymtab_addEntryAlways (/*@notnull@*/ usymtab s, /*@only@*/ uentry e)
553 ** In theory, we shouldn't need this test because it this is
554 ** only called when a library is being read, and it shouldn't
555 ** ever have a duplicate entry. In practice, its safer to
556 ** leave it in, though.
560 usymId thisentry = usymId_fromInt (s->nentries);
562 if (uentry_isValid (old = usymtab_lookupQuiet (s, uentry_rawName (e))))
565 (message ("Duplicate entry in load library: %s. "
566 "Old entry: %q. New entry: %q",
568 uentry_unparseFull (old),
569 uentry_unparseFull (e)));
571 uentry_setName (e, message ("__x_%s", uentry_rawName (e)));
572 /* This shouldn't happen...unless the library is bad! */
576 if (uentry_isVar (e) && !uentry_isGlobalMarker (e))
579 (e, sRef_makeCvar (globScope, thisentry,
581 stateInfo_makeLoc (uentry_whereLast (e), SA_DECLARED)));
584 usymtab_addEntryQuiet (s, e);
589 usymtab_addEntryAux (/*@notnull@*/ usymtab st, /*@keep@*/ uentry e, bool isSref)
590 /*@globals globtab@*/
593 usymId thisentry = usymId_fromInt (st->nentries);
595 llassert (!uentry_isElipsisMarker (e));
599 ** llassert (usymtab_lookupSafe (uentry_rawName (e)) == uentry_undefined);
602 llassertprint (uentry_isAnyTag (e) ? st == globtab : TRUE,
603 ("non-global tag: %s / %d", uentry_unparseFull (e), st->lexlevel));
605 if (st->lexlevel == fileScope
606 && (!(uentry_isStatic (e)) || uentry_isAnyTag (e)))
613 ctype ct = uentry_getType (e);
615 if (uentry_isFunction (e) && ctype_isFunction (ct))
617 ct = ctype_getReturnType (ct);
620 if (uentry_isStatic (e))
622 sRef sr = sRef_makeCvar (st->lexlevel, thisentry, ct,
623 stateInfo_makeLoc (uentry_whereLast (e), SA_DECLARED));
625 if (sRef_isStack (sr) || sRef_isLocalState (sr))
627 sRef_setAliasKind (sr, AK_STATIC, uentry_whereLast (e));
628 sRef_setDefined (sr, uentry_whereLast (e));
631 uentry_setSref (e, sr);
636 (e, sRef_makeCvar (st->lexlevel, thisentry, ct,
637 stateInfo_makeLoc (uentry_whereLast (e), SA_DECLARED)));
641 if (uentry_isDatatype (e))
643 uentry_setDatatype (e, typeId_fromUsymId (thisentry));
646 if (uentry_isFunction (e))
648 ctype ct = uentry_getType (e);
650 if (ctype_isFunction (ct)
651 && uentryList_isMissingParams (ctype_argsFunction (ct)))
653 if (uentry_isDeclared (e))
657 message ("Function %q declared without parameter list",
659 uentry_whereDeclared (e));
665 message ("Function %q specified without parameter list",
667 uentry_whereSpecified (e));
672 if (st == globtab && !uentry_isSpecified (e))
674 exprChecks_checkExport (e);
677 uentry_checkName (e);
679 usymtab_addEntryQuiet (st, e);
680 DPRINTF (("Adding entry: [%p] %s", e, uentry_unparseFull (e)));
685 usymtab_addEntry (uentry e)
686 /*@globals utab, globtab@*/
687 /*@modifies utab, e@*/
689 llassertprint (!usymtab_exists (uentry_rawName (e)),
690 ("Entry already exists: %s", uentry_unparse (e)));
692 return usymtab_addEntryAux (utab, e, FALSE);
696 usymtab_addGlobalEntry (uentry e)
697 /*@modifies globtab, e@*/
699 DPRINTF (("Add global: %s / %s", uentry_unparse (e), bool_unparse (uentry_isForward (e))));
701 (void) usymtab_addEntryAux (globtab, e, FALSE);
705 ** supercede and replace entry use elements of entries array, and
706 ** assign an element to a new value, and then free the old value.
707 ** Need -deparrays to avoid errors for this.
713 usymtab_supEntryAux (/*@notnull@*/ usymtab st,
714 /*@only@*/ uentry e, bool isSref)
715 /*@globals globtab, filetab@*/
716 /*@modifies st, globtab, e@*/
718 cstring ename = uentry_rawName (e);
719 bool staticEntry = FALSE;
722 DPRINTF (("Sup entry aux: %s", uentry_unparseFull (e)));
724 /* static tags in global scope */
725 if (st->lexlevel == fileScope
726 && (!(uentry_isStatic (e)) || uentry_isAnyTag (e)))
728 eindex = usymtab_getIndex (st, ename);
730 if (usymtab_indexFound (eindex))
732 uentry ce = st->entries[eindex];
736 message ("%s %q shadows static declaration",
737 ekind_capName (uentry_getKind (e)),
739 uentry_whereDeclared (e)))
741 uentry_showWhereLast (ce);
744 if (eindex == usymId_fromInt (st->nentries - 1))
750 st->entries[eindex] = st->entries[st->nentries - 1];
753 if (cstringTable_isDefined (st->htable))
755 cstringTable_replaceKey (st->htable, uentry_rawName (ce),
756 cstring_copy (uentry_rawName (e)));
766 if (uentry_isStatic (e)) {
767 if (uentry_isFunction (e)) {
769 ** Static function declarations are at the file level,
770 ** even if they are in a deeper scope.
773 st = usymtab_getFileTab ();
776 if (!uentry_isAnyTag (e) && st == globtab)
778 st = usymtab_getFileTab ();
780 DPRINTF (("Static entry!"));
785 eindex = usymtab_getIndex (st, ename);
787 if (usymtab_indexFound (eindex))
789 uentry ce = st->entries[eindex];
791 DPRINTF (("Found entry: %s", uentry_unparse (ce)));
793 if (uentry_isPriv (ce)
794 /* || (fileloc_isImport (uentry_whereSpecified (ce))) */
795 || (uentry_isStatic (ce)
796 && uentry_isAnyTag (ce)
797 && (uentry_isDeclared (ce)
798 && !fileloc_sameFile (uentry_whereDefined (ce),
799 uentry_whereDefined (e)))))
803 ** if overloading import should do some checks!
806 llassert ((st->lexlevel > fileScope || !sRef_modInFunction ()));
808 DPRINTF (("Overloading!"));
810 st->entries[eindex] = e;
812 if (uentry_isDatatype (e))
814 uentry_setDatatype (e, typeId_fromUsymId (eindex));
817 if (st == globtab && !uentry_isSpecified (e))
819 exprChecks_checkExport (e);
822 if (cstringTable_isDefined (st->htable))
824 cstringTable_replaceKey (st->htable, uentry_rawName (ce),
825 cstring_copy (uentry_rawName (e)));
831 else if (uentry_isSpecified (ce))
833 if (uentry_isSpecified (e))
835 DPRINTF (("Here we are: %s", uentry_unparseFull (e)));
837 if (fileloc_isImport (uentry_whereSpecified (ce)))
839 if (cstringTable_isDefined (st->htable))
841 cstringTable_replaceKey (st->htable,
843 cstring_copy (uentry_rawName (e)));
847 st->entries[eindex] = e;
850 if (uentry_isDatatype (e)) uentry_setDatatype (e, typeId_fromUsymId (eindex));
854 if (fileloc_isImport (uentry_whereSpecified (e)))
860 /* Respecification errors already reported */
861 DPRINTF (("Respecification: %s / %s",
862 fileloc_unparse (uentry_whereSpecified (e)),
863 bool_unparse (fileloc_isSpec (uentry_whereSpecified (e)))));
865 if (uentry_isDatatype (e))
867 uentry_setDatatype (e, typeId_fromUsymId (eindex));
870 if (cstringTable_isDefined (st->htable))
872 cstringTable_replaceKey (st->htable,
874 cstring_copy (uentry_rawName (e)));
877 llassert ((st->lexlevel > fileScope || !sRef_modInFunction ()));
879 st->entries[eindex] = e;
884 else /* e not specified */
886 DPRINTF (("Merging..."));
888 if (uentry_isDeclared (ce))
891 No - this can happen for internal typedefs
892 llassert ((st->lexlevel > fileScope || !sRef_modInFunction ()));
895 DPRINTF (("Merge defn"));
896 uentry_mergeDefinition (ce, e);
901 No - this can happen for internal typedefs
902 llassert ((st->lexlevel > fileScope || !sRef_modInFunction ()));
905 DPRINTF (("Merge entries..."));
906 uentry_mergeEntries (ce, e);
907 DPRINTF (("After: %s", uentry_unparseFull (ce)));
911 else /* ce not specified */
913 if (!(st->lexlevel > fileScope || !sRef_modInFunction ()))
915 if (uentry_isDatatype (e) || uentry_isAnyTag (e)
916 || uentry_isEnumConstant (e)
917 || uentry_isStatic (e)) /* bug fix from Brian St. Pierre */
920 ** Not a bug. Code like,
921 ** int f (void) { typedef int tint; ... }
927 llcontbug (message ("usymtab_supEntryAux: inconsistent state "
928 "(lexlevel = %d, modFunction = %s) adding: %q",
929 st->lexlevel, bool_unparse (sRef_modInFunction ()),
930 uentry_unparse (e)));
932 if (sRef_modInFunction ())
934 /* make sure the sRef is not bashed! */
935 /*@i@*/ e->sref = sRef_saveCopy (e->sref);
940 DPRINTF (("Merge.."));
941 uentry_mergeDefinition (ce, e);
946 ctype ct = uentry_getType (ce);
948 if (uentry_isFunction (ce) && ctype_isFunction (ct))
950 ct = ctype_getReturnType (ct);
954 (ce, sRef_makeCvar (st->lexlevel, eindex, ct,
955 stateInfo_makeLoc (uentry_whereLast (ce), SA_DECLARED)));
958 else /* no previous entry */
962 if (st->lexlevel == globScope
963 && !uentry_isStatic (e)
964 && !uentry_isExtern (e)
965 && usymtab_isDefined (filetab))
968 ** check if there is a static entry: (i.e.,
975 eindex = usymtab_getIndex (filetab, ename);
977 if (usymtab_indexFound (eindex))
979 uentry ce = filetab->entries[eindex];
981 uentry_setStatic (e);
982 uentry_mergeDefinition (ce, e);
988 outer = usymtab_lookupQuiet (st->env, ename);
990 DPRINTF (("New : [%p] %s", e, uentry_unparseFull (e)));
991 DPRINTF (("Outer: [%p] %s", outer, uentry_unparseFull (outer)));
994 ** no previous definition, add the new one
998 && uentry_isValid (outer)
999 && !(uentry_isYield (e) || uentry_isYield (outer))
1000 && fileloc_isDefined (uentry_whereLast (e))
1001 && !fileloc_isXHFile (uentry_whereLast (e))
1002 && fileloc_isDefined (uentry_whereLast (outer))
1003 && !fileloc_isXHFile (uentry_whereLast (outer)))
1005 if (!uentry_sameKind (outer, e))
1011 if (ctype_isUnknown (uentry_getType (outer))
1012 || uentry_isForward (outer))
1020 message ("%s %q shadows outer declaration",
1021 ekind_capName (uentry_getKind (e)),
1022 uentry_getName (e)),
1023 uentry_whereLast (e)))
1025 uentry_showWhereLast (outer);
1031 if (st == globtab && context_getFlag (FLG_NEWDECL))
1035 message ("New declaration: %q", uentry_getName (e)),
1036 uentry_whereLast (e));
1039 eindex = usymtab_addEntryAux (st, e, isSref);
1043 return (staticEntry ? usymId_invalid : eindex);
1047 usymtab_replaceEntryAux (/*@notnull@*/ usymtab st, /*@only@*/ uentry e)
1048 /*@globals globtab@*/ /*@modifies st, e@*/
1050 cstring ename = uentry_rawName (e);
1053 /* static tags in global scope */
1054 eindex = usymtab_getIndex (st, ename);
1056 if (usymtab_indexFound (eindex))
1058 uentry ce = st->entries[eindex];
1060 if (cstringTable_isDefined (st->htable))
1062 cstringTable_replaceKey (st->htable, uentry_rawName (ce),
1063 cstring_copy (uentry_rawName (e)));
1067 st->entries[eindex] = e;
1071 eindex = usymtab_addEntryAux (st, e, FALSE);
1077 void usymtab_supEntry (uentry e)
1078 /*@globals utab, filetab, globtab@*/
1079 /*@modifies utab, globtab, e@*/
1081 (void) usymtab_supEntryAux (utab, e, FALSE);
1085 ** this should be lots more efficient!
1088 static /*@exposed@*/ uentry
1089 usymtab_supEntryReturnAux (/*@notnull@*/ usymtab tab,
1090 /*@only@*/ uentry e, bool isref)
1091 /*@globals globtab, filetab@*/
1092 /*@modifies tab, globtab, e@*/
1094 cstring rawName = cstring_copy (uentry_rawName (e));
1095 bool stat = (tab == globtab) && uentry_isStatic (e);
1098 (void) usymtab_supEntryAux (tab, e, isref);
1102 ret = usymtab_lookupAux (filetab, rawName);
1106 ret = usymtab_lookupAux (tab, rawName);
1108 if (uentry_isInvalid (ret) && usymtab_isDefined (filetab))
1110 ret = usymtab_lookupAux (filetab, rawName);
1114 cstring_free (rawName);
1118 /*@dependent@*/ /*@exposed@*/ uentry
1119 usymtab_supEntryReturn (/*@only@*/ uentry e)
1120 /*@globals utab, filetab, globtab@*/
1121 /*@modifies utab, globtab, e@*/
1123 return (usymtab_supEntryReturnAux (utab, e, FALSE));
1126 /*@dependent@*/ /*@exposed@*/ uentry
1127 usymtab_supEntrySrefReturn (/*@only@*/ uentry e)
1128 /*@globals utab, globtab, filetab@*/
1129 /*@modifies utab, globtab, e@*/
1131 return (usymtab_supEntryReturnAux (utab, e, TRUE));
1134 /*@dependent@*/ /*@exposed@*/ uentry
1135 usymtab_supGlobalEntryReturn (uentry e)
1136 /*@globals globtab, filetab@*/
1137 /*@modifies globtab, e@*/
1141 ret = usymtab_supEntryReturnAux (globtab, e, FALSE);
1144 ** We need to keep track of internal function declarations, so
1145 ** we can remove them from the symbol table after exiting this
1146 ** function. This is a bit bogus, of course.
1149 if (sRef_modInFunction ())
1151 recordFunctionType (ret);
1158 usymtab_supTypeEntry (/*@only@*/ uentry e)
1159 /*@globals globtab, filetab@*/
1160 /*@modifies globtab, e@*/
1165 if (uentry_isAbstractDatatype (e))
1167 typeId tid = usymtab_supAbstractTypeEntry (e, FALSE);
1168 ret = ctype_createAbstract (tid);
1169 uid = typeId_toUsymId (tid);
1173 uid = usymtab_supEntryAux (globtab, e, FALSE);
1174 ret = ctype_createUser (typeId_fromUsymId (uid));
1177 if (sRef_modInFunction ())
1179 recordFunctionType (globtab->entries[uid]);
1186 usymtab_supReturnTypeEntry (/*@only@*/ uentry e)
1187 /*@globals globtab, filetab@*/
1188 /*@modifies globtab@*/
1192 DPRINTF (("Abstract? %s", uentry_unparseFull (e)));
1194 if (uentry_isAbstractDatatype (e))
1196 uid = typeId_toUsymId (usymtab_supAbstractTypeEntry (e, FALSE));
1198 else if (uentry_isMaybeAbstract (e) && context_getFlag (FLG_IMPABSTRACT))
1200 bool maybeabs = TRUE;
1201 cstring sname = uentry_getName (e);
1202 uentry ue = usymtab_lookupGlobSafe (sname);
1203 cstring_free (sname);
1205 if (uentry_isValid (ue))
1207 DPRINTF (("Lookup: %s", uentry_unparseFull (ue)));
1209 if (uentry_isDatatype (ue))
1211 if (uentry_isMaybeAbstract (ue))
1222 DPRINTF (("Not datatype!"));
1229 typeId tid = usymtab_supAbstractTypeEntry (e, FALSE);
1230 ux = usymtab_getTypeEntry (tid);
1231 uentry_setAbstract (ux);
1232 uid = typeId_toUsymId (tid);
1236 uid = usymtab_supEntryAux (globtab, e, FALSE);
1237 e = usymtab_getTypeEntry (typeId_fromUsymId (uid));
1239 if (uentry_isMaybeAbstract (e))
1241 uentry_setConcrete (e);
1247 uid = usymtab_supEntryAux (globtab, e, FALSE);
1248 e = usymtab_getTypeEntry (typeId_fromUsymId (uid));
1250 /*? evans 2002-12-16 removed this? it doesn't make sense
1251 if (uentry_isMaybeAbstract (e))
1253 uentry_setConcrete (e);
1258 if (sRef_modInFunction ())
1260 recordFunctionType (globtab->entries[uid]);
1263 return (globtab->entries[uid]);
1267 usymtab_supAbstractTypeEntry (/*@only@*/ uentry e, bool dodef)
1268 /*@globals globtab, filetab@*/
1269 /*@modifies globtab, e@*/
1274 uid = typeId_fromUsymId (usymtab_supEntryAux (globtab, e, FALSE));
1275 ue = usymtab_getTypeEntry (uid);
1279 uentry_setDatatype (ue, uid);
1282 if (context_getFlag (FLG_ACCESSMODULE)) /* was accessfile */
1284 context_addFileAccessType (uid);
1287 if (sRef_modInFunction ())
1289 recordFunctionType (globtab->entries[uid]);
1296 usymtab_supExposedTypeEntry (/*@only@*/ uentry e, bool dodef)
1297 /*@globals globtab, filetab@*/
1298 /*@modifies globtab, e@*/
1302 uid = typeId_fromUsymId (usymtab_supEntryAux (globtab, e, FALSE));
1306 uentry ue = usymtab_getTypeEntry (uid);
1308 uentry_setDatatype (ue, uid);
1311 if (sRef_modInFunction ())
1313 recordFunctionType (globtab->entries[uid]);
1320 usymtab_supForwardTypeEntry (/*@only@*/ uentry e)
1321 /*@globals globtab, filetab@*/
1322 /*@modifies globtab, e@*/
1324 typeId uid = typeId_fromUsymId (usymtab_supEntryAux (globtab, e, FALSE));
1325 uentry ue = usymtab_getTypeEntry (uid);
1327 uentry_setDatatype (ue, uid);
1329 if (sRef_modInFunction ())
1331 recordFunctionType (globtab->entries[uid]);
1334 return (uentry_getAbstractType (ue));
1338 usymtab_supEntrySref (uentry e)
1339 /*@globals utab, globtab, filetab@*/
1340 /*@modifies utab, globtab, e@*/
1342 sRef old = uentry_getSref (e);
1344 if (sRef_isType (old))
1346 uentry ue = usymtab_supEntryReturnAux (utab, e, TRUE);
1349 if (uentry_isValid (ue))
1351 sRef uref = uentry_getSref (ue);
1353 sRef_mergeStateQuiet (uref, old);
1354 sRef_clearDerived (uref);
1356 /*@noaccess uentry@*/
1358 else if (sRef_isKnown (old))
1360 usymtab_supEntry (e);
1364 (void) usymtab_supEntryAux (utab, e, TRUE);
1368 void usymtab_supGlobalEntry (/*@only@*/ uentry e)
1369 /*@globals globtab, filetab@*/
1370 /*@modifies globtab, filetab, e@*/
1374 DPRINTF (("Sup global entry: %s", uentry_unparse (e)));
1376 uid = usymtab_supEntryAux (globtab, e, FALSE);
1378 if (sRef_modInFunction ())
1380 recordFunctionType (globtab->entries[uid]);
1385 usymtab_supReturnFileEntry (/*@only@*/ uentry e)
1386 /*@globals filetab, globtab@*/
1387 /*@modifies filetab, globtab, e@*/
1389 llassert (filetab != usymtab_undefined);
1390 DPRINTF (("File entry: %s", uentry_unparse (e)));
1391 return (usymtab_supEntryReturnAux (filetab, e, FALSE));
1399 usymtab_inDeepScope () /*@globals utab@*/
1401 return (utab->lexlevel > paramsScope);
1405 usymtab_getIndex (/*@notnull@*/ usymtab s, cstring k)
1409 DPRINTF (("Lookup %s", k));
1411 if (cstringTable_isDefined (s->htable))
1413 i = cstringTable_lookup (s->htable, k);
1414 return usymId_fromInt (i);
1418 for (i = 0; i < s->nentries; i++)
1420 uentry current = s->entries[i];
1422 DPRINTF (("Check %d: %s", i, uentry_rawName (current)));
1424 if (!uentry_isUndefined (current)
1425 && cstring_equal (uentry_rawName (current), k))
1427 return usymId_fromInt (i);
1431 return usymId_notfound;
1436 usymtab_fetchIndex (/*@notnull@*/ usymtab s, usymId ui)
1438 int i = usymId_toInt (ui);
1439 llassert (i >= 0 && i < s->nentries);
1440 return (s->entries[i]);
1444 usymtab_getTypeId (cstring k) /*@globals globtab@*/
1446 usymId uid = usymtab_getIndex (globtab, k);
1448 if (!usymtab_indexFound (uid)
1449 || !(uentry_isDatatype (usymtab_getTypeEntry (typeId_fromUsymId (uid)))))
1452 return typeId_invalid;
1456 return typeId_fromUsymId (uid);
1460 /*@dependent@*/ uentry
1461 usymtab_lookupStructTag (cstring k)
1463 cstring sname = makeStruct (k);
1464 uentry ue = usymtab_lookupGlob (sname);
1466 cstring_free (sname);
1470 /*@dependent@*/ uentry
1471 usymtab_lookupUnionTag (cstring k)
1473 cstring uname = makeUnion (k);
1474 uentry res = usymtab_lookupGlob (uname);
1476 cstring_free (uname);
1480 /*@dependent@*/ uentry
1481 usymtab_lookupEnumTag (cstring k)
1483 cstring ename = makeEnum (k);
1484 uentry res = usymtab_lookupGlob (ename);
1486 cstring_free (ename);
1491 usymtab_getId (cstring k) /*@globals globtab@*/
1493 usymId uid = usymtab_getIndex (globtab, k);
1496 if (!usymtab_indexFound (uid))
1498 return usymId_invalid;
1501 ue = usymtab_getGlobalEntry (uid);
1503 if (uentry_isPriv (ue))
1505 return usymId_invalid;
1511 static /*@exposed@*/ uentry
1512 usymtab_getEntryAux (/*@notnull@*/ usymtab s, usymId uid)
1514 llassert (uid != usymId_invalid);
1516 if (uid < 0 || uid >= usymId_fromInt (s->nentries))
1518 llcontbug (message ("usymtab_getEntry: out of range: level = %d [%d]",
1520 return uentry_undefined;
1523 llassertprint (uentry_isValid (s->entries[uid]),
1524 ("entry undefined: %d", uid));
1526 return s->entries[uid];
1529 /*@dependent@*/ /*@observer@*/ uentry
1530 usymtab_getGlobalEntry (usymId uid)
1531 /*@globals utab, globtab@*/
1533 if (dbgfree) return (uentry_undefined);
1535 if (utab->lexlevel > paramsScope)
1537 /* need to do this the awkward way, since it could be in conditional scope */
1538 return (usymtab_lookupSafe (uentry_rawName (globtab->entries[uid])));
1542 return (globtab->entries[uid]);
1546 /*@dependent@*/ /*@exposed@*/ uentry usymtab_getTypeEntry (typeId uid)
1547 /*@globals globtab@*/
1551 if (uid >= 0 && uid < typeId_fromInt (globtab->nentries))
1553 return (globtab->entries[uid]);
1557 return (uentry_undefined);
1562 llassert (uid >= 0 && uid < typeId_fromInt (globtab->nentries));
1563 return (globtab->entries[uid]);
1571 /*@dependent@*/ /*@exposed@*/ uentry usymtab_getTypeEntrySafe (typeId uid)
1572 /*@globals globtab@*/
1574 if (uid < 0 || uid >= typeId_fromInt (globtab->nentries))
1576 return uentry_undefined;
1579 return (globtab->entries[uid]);
1582 bool usymtab_isBoolType (typeId uid)
1583 /*@globals globtab@*/
1585 llassert (uid >= 0 && uid < typeId_fromInt (globtab->nentries));
1587 return (cstring_equal (uentry_rawName (globtab->entries[uid]),
1588 context_getBoolName ()));
1591 cstring usymtab_getTypeEntryName (typeId uid)
1592 /*@globals globtab@*/
1598 return (cstring_makeLiteral ("<freetype>"));
1601 ue = usymtab_getTypeEntry (uid);
1603 if (dbgload && !uentry_isValid (ue))
1605 return (message ("<missing type: %d>", uid));
1608 llassertprint (uentry_isValid (ue), ("type undefined: %d", uid));
1610 return (uentry_getName (ue));
1614 /*@unused@*/ static void
1615 usymtab_rehash (/*@notnull@*/ usymtab s)
1619 if (cstringTable_isDefined (s->htable))
1621 cstringTable_free (s->htable);
1624 s->htable = cstringTable_create (LLAHSHSIZE);
1626 for (i = 0; i < s->nentries; i++)
1628 cstringTable_insert (s->htable, cstring_copy (uentry_rawName (s->entries[i])), i);
1634 ** superficial copy of usymtab
1636 ** DO copy spec entries
1639 static /*@only@*/ /*@notnull@*/ usymtab
1640 usymtab_shallowCopy (/*@notnull@*/ usymtab s) /*@*/
1642 usymtab copytab = usymtab_createRoot ();
1645 for (i = 0; i < s->nentries; i++)
1647 usymtab_addEntryBase (copytab, s->entries[i]);
1654 usymtab_shallowFree (/*@only@*/ /*@notnull@*/ usymtab s)
1656 aliasTable_free (s->aliases);
1657 refTable_free (s->reftable, s->nentries);
1659 /*@-compdestroy@*/ sfree (s); /*@=compdestroy@*/
1662 usymId usymtab_convertTypeId (typeId uid)
1664 return usymtab_convertId (typeId_toUsymId (uid));
1668 ** usymtab_convertId: converts usymId from old table to sorted one
1671 usymId usymtab_convertId (usymId uid)
1672 /*@globals oldtab, utab@*/
1678 llassert (usymtab_isDefined (oldtab));
1680 ue = usymtab_getEntryAux (oldtab, uid);
1682 llassertprint (uentry_isValid (ue), ("convertId: undefined: %d", uid));
1684 name = uentry_rawName (ue);
1686 ret = usymtab_getIndex (utab, name);
1687 llassert (ret == uid); /*! for now, no rehash! */
1688 DPRINTF (("Convert: %s [%d] -> %s [%d]",
1689 uentry_unparse (ue), uid,
1690 uentry_unparse (utab->entries[ret]), ret));
1692 llassertprint (ret != usymId_invalid, ("convertId: return is invalid"));
1698 usymtab_prepareDump (void)
1699 /*@globals oldtab, utab@*/
1700 /*@modifies oldtab, utab@*/
1702 llassert (usymtab_inGlobalScope ());
1703 llassert (oldtab == usymtab_undefined);
1706 DPRINTF (("Preparing to dump:"));
1707 usymtab_printAll ();
1710 oldtab = usymtab_shallowCopy (utab);
1713 ** alpha compare - make sure order is same on different platforms
1714 ** error messages appear in same order
1718 qsort (utab->entries, (size_t)utab->nentries,
1719 sizeof (*utab->entries),
1720 (int (*)(const void *, const void *)) uentry_xcomparealpha);
1722 usymtab_rehash (utab);
1726 DPRINTF (("After rehash:"));
1727 usymtab_printAll ();
1731 void usymtab_dump (FILE *fout)
1732 /*@globals utab, oldtab@*/
1735 bool neednl = FALSE;
1736 uentry lastentry = uentry_undefined;
1737 ekind lastekind = KINVALID;
1741 ** must call prepareDump first
1744 llassert (oldtab != usymtab_undefined);
1746 for (i = 0; i < utab->nentries; i++)
1748 uentry thisentry = utab->entries[i];
1749 ekind thisekind = uentry_getKind (thisentry);
1751 if (!uentry_hasRealName (thisentry))
1753 llassert (uentry_isGlobalMarker (thisentry));
1757 check (fputc ('\n', fout) == (int) '\n');
1760 fprintf (fout, "*%d (GlobalMarker)\n", KGLOBALMARKER);
1761 lastekind = KINVALID;
1767 if (thisekind != lastekind)
1771 check (fputc ('\n', fout) == (int) '\n');
1775 lastentry = uentry_undefined;
1776 fprintf (fout, "*%d (%s)\n", ekind_toInt (thisekind),
1777 cstring_toCharsSafe (ekind_capName (thisekind)));
1778 lastekind = thisekind;
1783 ** evans - 2001-02-18 - added the - 48 fudge factor...
1784 ** extra characters dumped, but I haven't counded them carefully...
1787 if (uentry_isInvalid (lastentry) || !uentry_equiv (lastentry, thisentry)
1788 || (linelen > (MAX_DUMP_LINE_LENGTH - (2 * MAX_NAME_LENGTH) - 48)))
1792 DPRINTF (("Dumping entry: %d", i));
1793 cdump = message ("^%d %q", i, uentry_dump (thisentry));
1794 /* was: cdump = uentry_dump (thisentry)); */
1796 lastentry = thisentry;
1799 check (fputc ('\n', fout) == (int) '\n');
1803 linelen += cstring_length (cdump);
1805 /* no new line here! */
1806 if (cstring_length (cdump) > 0)
1808 check (fputs (cstring_toCharsSafe (cdump), fout) != EOF);
1811 cstring_free (cdump);
1816 cstring cdump = uentry_rawName (thisentry);
1817 DPRINTF (("Raw name: %s", cdump));
1818 linelen += (cstring_length (cdump) + 1);
1819 fprintf (fout, "#%s", cstring_toCharsSafe (cdump));
1826 check (fputc ('\n', fout) == (int) '\n');
1829 lastekind = KINVALID;
1831 fprintf(fout, ";; Library constraints\n");
1833 /*drl July 27 added this so that libraries without
1834 buffer constraints would be handled correctly.
1835 I'm trying to do this without breaking older libraries.
1837 Splint should still be able to handle libraries without this message.
1841 fprintf(fout, "start_Buffer_Constraints\n");
1843 for (i = 0; i < utab->nentries; i++)
1845 uentry thisentry = utab->entries[i];
1847 if (uentry_isFunction (thisentry) )
1849 constraintList preconditions;
1850 constraintList postconditions;
1852 preconditions = uentry_getFcnPreconditions (thisentry);
1853 postconditions = uentry_getFcnPostconditions (thisentry);
1855 if ( constraintList_isDefined(preconditions) ||
1856 constraintList_isDefined(postconditions) )
1858 fprintf(fout,"%s\n", cstring_toCharsSafe (uentry_rawName(thisentry) ) );
1859 if (constraintList_isDefined(preconditions) )
1861 fprintf(fout,"pre:\n");
1862 constraintList_dump(preconditions, fout);
1863 fprintf (fout, ";; end precondition constraints\n" );
1864 constraintList_free(preconditions);
1868 fprintf(fout,"pre:EMPTY\n");
1870 if (constraintList_isDefined(postconditions) )
1872 fprintf(fout,"post:\n");
1873 constraintList_dump(postconditions, fout);
1874 fprintf (fout, ";; end precondition constraints\n" );
1875 constraintList_free(postconditions);
1879 fprintf(fout,"post:EMPTY\n");
1888 void usymtab_load (FILE *f)
1889 /*@globals utab, globtab@*/
1890 /*@modifies utab, *f@*/
1892 char *s = mstring_create (MAX_DUMP_LINE_LENGTH);
1894 ekind kind = KINVALID;
1895 fileloc loc = g_currentloc;
1901 llassert (utab == globtab);
1902 llassert (utab->nentries == 0);
1904 while (((s = reader_readLine (f, s, MAX_DUMP_LINE_LENGTH)) != NULL)
1907 /* ignore ; comments */ ;
1910 while (s != NULL && *s != ';')
1918 ek = reader_getInt (&s);
1920 if (ek == KGLOBALMARKER)
1922 uentry lue = uentry_makeGlobalMarker ();
1923 DPRINTF (("Adding global marker: %s", uentry_unparseFull (lue)));
1924 usymtab_addEntryAlways (utab, lue);
1930 kind = ekind_fromInt (ek);
1938 (cstring_makeLiteral
1939 ("Library is in obsolete format. Use splint +whichlib "
1940 "to see which library is being loaded."));
1943 if (reader_optCheckChar (&s, '^'))
1945 index = reader_getInt (&s);
1952 llassert (kind != KINVALID);
1953 ue = uentry_undump (kind, loc, &s);
1955 llassert (utab->nentries == index || index == -1);
1957 if (uentry_isValid (ue))
1959 int lastindex = utab->nentries;
1960 ue = usymtab_addEntryAlways (utab, ue);
1964 if (uentry_isConstant (ue)) /*@i23! isPreProcessorMacro */
1966 cstring uname = uentry_getName (ue);
1968 /* Also check its a macro... */
1969 DPRINTF (("Installing: %s", uname));
1971 cpphash_installMacro
1972 (mstring_copy (cstring_toCharsSafe (uname)),
1973 cstring_length (uname),
1974 cpplib_createDefinition (message ("%s 255", uname),
1977 cpphash_hashCode (cstring_toCharsSafe (uname),
1978 cstring_length (uname),
1981 DPRINTF (("After install: %s", uname));
1985 if (utab->nentries != lastindex + 1)
1987 DPRINTF (("No add: %s", uentry_unparseFull (ue)));
1995 ** now, any other names are the same uentry
1998 while (*(s++) == '#')
2000 cstring name = cstring_fromCharsO (reader_getWord (&s));
2001 uentry nue = uentry_nameCopy (name, ue);
2003 DPRINTF (("Name copy: %s", uentry_unparseFull (nue)));
2007 usymtab_addEntryAlways (utab, nue);
2010 while ((c = *s) != '\0' && (c !='\n'))
2012 if (c != ' ' || c != '\t')
2014 llbuglit ("Junk in load file");
2022 s = reader_readLine (f, os, MAX_DUMP_LINE_LENGTH);
2027 to handle reading of buffer overflow related constraints
2029 while (fgets (s, MAX_DUMP_LINE_LENGTH, f) != NULL
2032 ; /* ignore ;-comments */
2035 /*drl July 27 added this so that libraries without
2036 buffer constraints would be handled correctly.
2037 I'm trying to do this without breaking older libraries*/
2039 /*check for "optional" start buffer constraints message*/
2041 if (mstring_equalPrefix (s, "start_Buffer_Constraints"))
2043 (void) fgets (s, MAX_DUMP_LINE_LENGTH, f);
2046 while (s != NULL && *s != ';')
2048 constraintList preconditions;
2049 constraintList postconditions;
2050 cstring name = cstring_fromChars (reader_getWord (&s));
2053 ue = usymtab_lookup (name);
2054 cstring_free (name);
2056 preconditions = constraintList_undefined;
2057 postconditions = constraintList_undefined;
2059 if (!uentry_isValid(ue) )
2061 llfatalbug ((message("Invalid uentry for %s library file may be corrupted", cstring_fromChars(s) ) ));
2063 s = fgets (os, MAX_DUMP_LINE_LENGTH, f);
2065 temp = cstring_fromChars (reader_getWord(&s) );
2067 if (cstring_compareLit (temp,"pre:") == 0 )
2069 preconditions = constraintList_undump (f);
2073 if (cstring_compareLit (temp,"pre:EMPTY") != 0 )
2074 llfatalbug ((message("Error reading library file pre:EMPTY expected but got %s", temp ) ));
2079 s = fgets (os, MAX_DUMP_LINE_LENGTH, f);
2081 temp = cstring_fromChars(reader_getWord(&s) );
2082 if (cstring_compareLit (temp, "post:") == 0 )
2084 postconditions = constraintList_undump (f);
2088 if (cstring_compareLit (temp, "post:EMPTY") != 0 )
2089 llfatalbug ((message("Error reading library file post:EMPTY expected but got %s", temp ) ));
2092 cstring_free (temp);
2094 uentry_setPreconditions (ue, functionConstraint_createBufferConstraint (preconditions));
2095 uentry_setPostconditions (ue, functionConstraint_createBufferConstraint (postconditions));
2097 s = fgets (os, MAX_DUMP_LINE_LENGTH, f);
2105 ** file scope for static variables
2109 usymtab_enterFile ()
2110 /*@globals utab, globtab, filetab@*/
2111 /*@modifies filetab@*/
2113 llassert (utab == globtab);
2118 usymtab_entries (globtab, ue)
2120 if (sRef_hasDerived (uentry_getSref (ue)))
2122 fprintf (g_warningstream, "Derived Global: %s\n", uentry_unparse (ue));
2123 fprintf (g_warningstream, "sRef: %s\n", sRef_unparseFull (ue->sref));
2125 } end_usymtab_entries ;
2129 usymtab_enterScope ();
2135 /*@globals utab, filetab@*/
2136 /*@modifies filetab, utab@*/
2139 llassert (utab->lexlevel == 1);
2141 usymtab_exitScope (exprNode_undefined);
2146 usymtab_enterScope ()
2147 /*@globals utab, globtab, filetab@*/
2150 usymtab t = usymtab_create (US_NORMAL, utab, TRUE);
2152 /* unconditional scope: optimize to avoid copy */
2153 t->aliases = aliasTable_copy (utab->aliases);
2156 llassert (usymtab_isDefined (t->env));
2158 if (t->env->lexlevel == paramsScope && context_inFunctionLike ())
2160 noshadowerror = TRUE;
2161 usymtab_handleParams ();
2162 noshadowerror = FALSE;
2167 ** setup external references:
2168 ** o only, unique params alias external args
2169 ** o other params may alias anything of their type
2173 usymtab_handleParams (void)
2174 /*@globals utab, globtab, filetab@*/
2175 /*@modifies utab, globtab@*/
2177 usymtab ptab = utab->env;
2178 uentry fcn = context_getHeader ();
2180 usymtab_entries (ptab, param)
2184 if (!uentry_isYield (param))
2187 sRef pref = uentry_getSref (param);
2189 /* Could be a global. */
2191 if (uentry_isAnyParam (param))
2193 ue = uentry_makeVariable (fixParamName (uentry_rawName (param)),
2194 uentry_getType (param),
2195 fileloc_copy (uentry_whereDeclared (param)),
2198 uentry_copyState (ue, param);
2199 uentry_setRefParam (ue);
2201 ue = usymtab_supEntrySrefReturn (ue);
2203 /* must be after supercede! */
2205 if (!sRef_stateKnown (pref))
2207 uentry_setDefState (ue, SS_DEFINED);
2208 uentry_setDefState (param, SS_DEFINED);
2212 if (sRef_isStateSpecial (pref))
2214 uentry_setDefState (ue, SS_SPECIAL); /* ALLOCATED); */
2215 /* evans 2002-01-01: should be unnecessary, the pre clauses
2216 ** set the state if necessary.
2221 uentry_setDefState (ue, sRef_getDefState (pref));
2225 uref = uentry_getSref (ue);
2227 if (sRef_isStack (uref))
2229 alkind pkind = sRef_getAliasKind (pref);
2231 if (alkind_isKnown (pkind) && !alkind_isLocal (pkind)
2232 && !alkind_isStack (pkind))
2234 sRef_setAliasKind (uref, pkind, fileloc_undefined);
2235 sRef_setOrigAliasKind (uref, pkind);
2239 sRef_setAliasKind (uref, AK_IMPTEMP, fileloc_undefined);
2240 sRef_setOrigAliasKind (uref, AK_IMPTEMP);
2242 if (uentry_isOut (param))
2248 sRef_setDefined (uref, fileloc_undefined);
2254 usymtab_addMustAlias (uref, pref);
2256 if (!(uentry_isOnly (param) || uentry_isUnique (param)))
2259 ** This is needed for detecting possibly aliased parameters.
2262 sRef s = sRef_makeExternal (uref);
2263 usymtab_addMustAlias (uref, s);
2266 if (sRef_isKillRef (pref))
2268 sRef_setAliasKind (uref, AK_NEWREF, fileloc_undefined);
2269 sRef_setOrigAliasKind (uref, AK_KILLREF);
2271 else if (sRef_isRefCounted (uref))
2273 sRef_setOrigAliasKind (uref, AK_REFCOUNTED);
2278 sRef_setOrigAliasKind (uref, AK_LOCAL);
2285 } end_usymtab_entries;
2288 if (uentry_hasStateClauseList (fcn))
2290 stateClauseList clauses = uentry_getStateClauseList (fcn);
2292 stateClauseList_preElements (clauses, cl)
2294 fileloc loc = stateClause_loc (cl);
2295 sRefSet osrs = sRefSet_undefined;
2298 if (stateClause_isGlobal (cl))
2300 DPRINTF (("Global Marker: %s",
2301 sRef_unparseFull (usymtab_lookupGlobalMarker ())));
2302 llassert (sRef_isGlobalMarker (usymtab_lookupGlobalMarker ()));
2303 srs = sRefSet_single (usymtab_lookupGlobalMarker ());
2308 srs = stateClause_getRefs (cl);
2311 sRefSet_elements (srs, el)
2313 sRef base = sRef_getRootBase (el);
2314 sRef sb = sRef_updateSref (el);
2316 if (sRef_isResult (base))
2318 ; /* nothing to do before */
2320 else if (sRef_isParam (base) || sRef_isGlobalMarker (base))
2322 if (stateClause_setsMetaState (cl))
2324 /* copied from exprNode.c:3040 */
2325 qual ql = stateClause_getMetaQual (cl);
2326 annotationInfo ainfo = qual_getAnnotationInfo (ql);
2327 metaStateInfo minfo = annotationInfo_getState (ainfo);
2328 cstring key = metaStateInfo_getName (minfo);
2329 int mvalue = annotationInfo_getValue (ainfo);
2331 DPRINTF (("Sets meta state! %s", stateClause_unparse (cl)));
2333 if (sRef_isResult (base))
2339 sRef_setMetaStateValueComplete (sb, key, mvalue, loc);
2344 sRefMod modf = stateClause_getEntryFunction (cl);
2348 sRefSet aliases = usymtab_allAliases (sb);
2352 sRefSet_elements (aliases, sr)
2355 } end_sRefSet_elements ;
2357 sRefSet_free (aliases);
2363 if (sRef_isValid (base))
2365 DPRINTF (("Base: %s", sRef_unparseFull (base)));
2369 } end_sRefSet_elements ;
2370 } end_stateClauseList_preElements ;
2375 usymtab_enterFunctionScope (uentry fcn)
2376 /*@globals utab, filetab, globtab@*/
2379 usymtab t = usymtab_create (US_NORMAL, utab, TRUE);
2381 DPRINTF (("Enter function: %s", uentry_unparse (fcn)));
2383 if (utab->lexlevel != fileScope)
2385 if (utab->lexlevel > fileScope)
2387 llparseerror (cstring_makeLiteral ("New function scope inside function"));
2389 while (utab->lexlevel > fileScope)
2391 /*@i@*/ utab = usymtab_dropEnv (utab);
2398 llfatalbug (cstring_makeLiteral ("New function not inside file."));
2400 /*@-branchstate@*/ } /*@=branchstate@*/
2404 DPRINTF (("Globs: %s", globSet_unparse (uentry_getGlobs (fcn))));
2406 globSet_allElements (uentry_getGlobs (fcn), el)
2408 DPRINTF (("Here we go: %s", sRef_unparseFull (el)));
2410 if (sRef_isUndefGlob (el))
2412 usymId index = sRef_getScopeIndex (el);
2413 sRef sr = sRef_updateSref (el);
2414 fileloc loc = uentry_whereEarliest (fcn);
2416 DPRINTF (("update: %s", sRef_unparseFull (sr)));
2417 DPRINTF (("Undef!"));
2418 if (sRef_isFileStatic (el))
2420 ctype ct = sRef_getType (el);
2423 llassert (usymtab_isDefined (filetab));
2425 ue = usymtab_fetchIndex (filetab, index);
2427 if (ctype_isRealArray (ct) || ctype_isRealSU (ct))
2429 sRef_setAllocated (sr, loc);
2433 sRef_setUndefined (sr, loc);
2438 uentry ue = globtab->entries[index];
2439 ctype ct = uentry_getType (ue);
2441 if (ctype_isArray (ct) || ctype_isSU (ct))
2443 sRef_setAllocated (sr, loc);
2447 sRef_setUndefined (sr, loc);
2451 else if (sRef_isAllocated (el))
2453 sRef sr = sRef_updateSref (el);
2454 fileloc loc = uentry_whereEarliest (fcn);
2456 sRef_setAllocated (sr, loc);
2458 else if (sRef_isPartial (el))
2460 sRef sr = sRef_updateSref (el);
2461 fileloc loc = uentry_whereEarliest (fcn);
2463 sRef_setPartial (sr, loc);
2468 sRef sr = sRef_updateSref (el);
2469 fileloc loc = uentry_whereEarliest (fcn);
2471 sRef_setDefined (sr, loc);
2475 /* shouldn't need to do anything! */
2477 } end_globSet_allElements;
2479 DPRINTF (("Globs after: %s", globSet_unparse (uentry_getGlobs (fcn))));
2481 usymtab_checkAllValid ();
2486 usymtab_caseBranch (void)
2489 usymtab t = usymtab_create (US_CBRANCH, utab, FALSE);
2494 usymtab_switchBranch (/*@unused@*/ exprNode s)
2497 usymtab t = usymtab_create (US_SWITCH, utab, FALSE);
2499 t->aliases = aliasTable_copy (utab->aliases);
2504 usymtab_trueBranch (/*@only@*/ guardSet guards)
2507 usymtab t = usymtab_create (US_TBRANCH, utab, FALSE);
2510 ** not true! (could be in a macro)
2512 ** llassertprint (utab->lexlevel > paramsScope,
2513 ** ("not in scope: %s", usymtab_unparseLocal ()));
2517 guardSet_free (t->guards);
2520 aliasTable_free (t->aliases);
2521 t->aliases = aliasTable_copy (utab->aliases);
2529 ** { int a; if (...) a = 3; < a may be undefined here!
2534 usymtab_popTrueBranch (exprNode pred, exprNode expr, clause cl) /*@modifies utab@*/
2537 ** add a false branch
2538 ** (could be done more efficiently as a special case, but
2539 ** it is better to only maintain one version of the code)
2542 if (utab->kind != US_TBRANCH
2543 && context_inIterDef ())
2545 usymtab_exitScope (expr);
2549 DPRINTF (("pop true branch.."));
2550 usymtab_altBranch (guardSet_invert (exprNode_getGuards (pred)));
2551 usymtab_popBranches (pred, expr, exprNode_undefined, TRUE, cl);
2556 usymtab_popCaseBranch () /*@modifies utab@*/
2558 llassert (utab->kind == US_CBRANCH);
2559 usymtab_quietPlainExitScope ();
2563 usymtab_popTrueExecBranch (exprNode pred, exprNode expr, clause cl)
2566 ** add a false branch that must return --- that is,
2567 ** the true branch is always executed!
2570 usymtab_altBranch (guardSet_invert (exprNode_getGuards (pred)));
2571 usymtab_popBranches (pred, expr, exprNode_makeMustExit (), FALSE, cl);
2575 usymtab_popOrBranch (exprNode pred, exprNode expr)
2579 usymtab env = utab->env;
2580 usymtab otab = utab;
2583 llassert (env != NULL);
2585 if (exprNode_isError (expr))
2591 mustReturn = exprNode_mustEscape (expr);
2595 llassert (utab->kind == US_TBRANCH);
2598 ** merge each entry in table with its original
2599 ** unless execution cannot continue after this branch
2602 for (i = 0; i < utab->nentries; i++)
2604 uentry current = utab->entries[i];
2605 uentry old = usymtab_lookupAux (env, uentry_rawName (current));
2607 uentry_mergeState (old, current, exprNode_loc (expr),
2608 mustReturn, FALSE, TRUE, ORCLAUSE);
2614 env->guards = guardSet_levelUnionFree (env->guards,
2615 guardSet_invert (exprNode_getGuards (pred)),
2620 env->aliases = aliasTable_levelUnion (env->aliases, otab->aliases, env->lexlevel);
2623 /* env is now utab */
2624 usymtab_quietPlainExitScope ();
2628 ** case syntax in C is very unrestricted. This is unfortunate.
2630 ** A switch case is ended either by a new case or default, or
2631 ** a close } that may close the switch or some other control
2636 usymtab_newCase (/*@unused@*/ exprNode pred, exprNode last)
2639 bool mustBreak = usymtab_mustBreak (utab);
2640 bool mustReturn = usymtab_mustEscape (utab);
2641 usymtab stab = utab;
2643 DPRINTF (("New case!"));
2646 ** Find last case (or outer switch)
2649 while (stab->kind != US_CBRANCH && stab->kind != US_SWITCH)
2652 llassert (stab != GLOBAL_ENV);
2655 while (stab->kind == US_CBRANCH)
2658 llassert (stab != GLOBAL_ENV);
2662 ** if its a fall through case, merge in outside entries and last case.
2667 ** case 1: x = 3; <fall through>
2668 ** case 2: << x may not be defined
2672 if (!mustBreak && !mustReturn && utab->kind == US_CBRANCH)
2674 llassert (stab->kind == US_SWITCH || stab->kind == US_NORMAL);
2676 usymtab_entries (utab, ue) /* but, keep track of used variables */
2678 uentry old = usymtab_lookupAux (stab, uentry_rawName (ue));
2680 llassert (uentry_isValid (old));
2682 /* modifies ue, not old */
2684 uentry_mergeState (ue, old, exprNode_loc (last),
2685 FALSE, FALSE, TRUE, CASECLAUSE);
2686 } end_usymtab_entries;
2688 utab->aliases = aliasTable_levelUnion (utab->aliases,
2689 stab->aliases, utab->lexlevel);
2692 ** No need for a new branch.
2699 usymtab_caseBranch ();
2700 /*@-mustfree@*/ /*< utab->aliases >*/
2701 utab->aliases = aliasTable_copy (stab->aliases);
2709 ** for && (both pred and expr are executed)
2713 usymtab_popAndBranch (exprNode pred, /*@unused@*/ exprNode expr)
2716 usymtab env = utab->env;
2720 llassert (utab->kind == US_TBRANCH);
2723 ** merge each entry in table with its original
2724 ** unless execution cannot continue after this branch
2727 for (i = 0; i < utab->nentries; i++)
2729 uentry current = utab->entries[i];
2730 sRef tref = uentry_getSref (current);
2731 uentry old = usymtab_lookupAux (env, uentry_rawName (current));
2732 sRef oref = uentry_getSref (old);
2734 /* note that is current is in a nested branch,
2735 it may create a "new" old entry. */
2737 llassert (uentry_isValid (old));
2738 uentry_mergeState (old, current, exprNode_loc (expr),
2739 FALSE, FALSE, TRUE, ANDCLAUSE);
2742 ** if is it defined by the second clause, then it should be defined.
2745 if (sRef_isAnyDefined (tref)
2746 && (sRef_isAllocated (oref) || sRef_isStateUndefined (oref)))
2748 sRef_setDefined (oref, g_currentloc);
2752 utab->guards = guardSet_levelUnionFree (utab->guards,
2753 guardSet_invert (exprNode_getGuards (pred)),
2755 utab->aliases = aliasTable_levelUnion (utab->aliases, otab->aliases, utab->lexlevel);
2757 usymtab_quietPlainExitScope ();
2762 ** Stack should be [ US_CBRANCH+ US_SWITCH ]
2763 ** Only branches which do not return (except possibly the last branch) are included.
2765 ** Conditionally merge state from all CBRANCHes.
2767 ** If allpaths is TRUE, then all possible executions go through some switch
2768 ** case, and the original scope is not merged.
2772 usymtab_exitSwitch (/*@unused@*/ exprNode sw, bool allpaths)
2775 usymtab ttab = utab;
2776 usymtab stab = ttab;
2777 usymtab ltab = ttab;
2778 bool lastMustReturn = usymtab_mustEscape (utab);
2782 while (stab->kind == US_CBRANCH)
2785 llassert (stab != GLOBAL_ENV);
2788 while (stab->kind == US_NORMAL)
2791 llassert (stab != GLOBAL_ENV);
2794 llassert (stab->kind == US_SWITCH);
2796 /* go to the scope outside the switch (US_SWITCH is just a marker! */
2798 llassert (stab != GLOBAL_ENV);
2802 llassert (usymtab_isDefined (ttab));
2804 if (ttab->kind == US_CBRANCH)
2806 /* was quietPlainExitScope --- but, can't free it yet! */
2808 llassert (utab != GLOBAL_ENV);
2810 while (ttab->kind == US_CBRANCH)
2813 ** (from popTrueBranch)
2816 bool mustReturn = usymtab_mustEscape (ttab);
2817 bool mustBreak = usymtab_mustBreak (ttab);
2819 usymtab_entries (ttab, current)
2821 uentry old = /*@-compmempass@*/ usymtab_lookupAux (ltab, uentry_rawName (current));
2825 ** note that is this is in a nested branch,
2826 ** it may create a "new" old entry.
2829 if (uentry_isValid (old))
2833 uentry_mergeUses (current, old);
2834 uentry_setState (old, current);
2838 uentry_mergeState (old, current, exprNode_loc (sw),
2839 mustReturn, FALSE, TRUE, SWITCHCLAUSE);
2846 } end_usymtab_entries;
2849 ** if entry is not in symbol table for this case, merge with pre-switch
2853 if (!mustReturn && !mustBreak)
2855 usymtab_entries (stab, current)
2857 if (!usymtab_indexFound (usymtab_getIndex (ttab, uentry_rawName (current))))
2859 uentry old = /*@-compmempass@*/
2860 usymtab_lookupAux (ltab, uentry_rawName (current));
2863 llassert (uentry_isValid (old));
2864 uentry_mergeState (old, current, exprNode_loc (sw),
2865 FALSE, FALSE, TRUE, SWITCHCLAUSE);
2867 } end_usymtab_entries;
2870 ltab->env = ttab->env;
2874 ** Suprious error, becuase of environments.
2877 /*@i1@*/ utab = ltab;
2879 lastMustReturn = FALSE;
2886 ** now, there is one US_CBRANCH. Merge this with the stab.
2890 for (i = 0; i < ltab->nentries; i++)
2892 uentry current = ltab->entries[i];
2893 uentry old = usymtab_lookupAux (stab, uentry_rawName (current));
2895 /* note that is this is in a nested branch,
2896 it may create a "new" old entry. */
2899 if (uentry_isValid (old))
2903 uentry_mergeUses (current, old);
2904 uentry_setState (old, current);
2908 uentry_mergeState (old, current, exprNode_loc (sw),
2909 FALSE, FALSE, TRUE, SWITCHCLAUSE);
2923 ** switch may or may not be followed by a new scope
2926 if (utab->kind == US_SWITCH)
2928 usymtab_quietPlainExitScope ();
2932 usymtab_quietPlainExitScope ();
2933 llassert (utab->kind == US_SWITCH);
2934 usymtab_quietPlainExitScope ();
2940 updateNullState (sRef el, /*@notnull@*/ usymtab ttab,
2941 /*@notnull@*/ usymtab ftab, bool trueGuard)
2943 sRef base = sRef_getRootBase (el);
2944 int level = sRef_lexLevel (base);
2946 if (sRef_isCvar (base))
2948 usymId index = sRef_getScopeIndex (base);
2949 uentry ue = usymtab_getRefTab (ttab, level, index);
2951 if (!uentry_isLset (ue))
2953 sRef sr = uentry_getSref (ue);
2957 sRef_setDerivNullState (sr, el, NS_NOTNULL);
2961 if (!guardSet_isGuarded (ttab->guards, el)
2962 && !sRef_isNotNull (sr))
2964 DPRINTF (("Here! %s / %s",
2965 sRef_unparseFull (sr),
2966 sRef_unparseFull (el)));
2967 sRef_setDerivNullState (sr, el, NS_DEFNULL);
2976 ue = usymtab_getRefTab (ftab, level, index);
2978 if (!uentry_isLset (ue))
2980 sRef sr = uentry_getSref (ue);
2982 if (!trueGuard) /* yikes! forgot the ! */
2984 sRef_setDerivNullState (sr, el, NS_NOTNULL);
2989 if (!guardSet_isGuarded (ftab->guards, el)
2990 && !sRef_isNotNull (sr))
2992 sRef_setDerivNullState (sr, el, NS_DEFNULL);
3004 usymtab_popBranches (exprNode pred, exprNode tbranch, exprNode fbranch,
3005 bool isOpt, clause cl)
3009 usymtab ftab = utab;
3010 usymtab ttab = utab->env;
3014 guardSet guards = exprNode_getGuards (pred);
3015 sRefSet tguards = guardSet_getTrueGuards (guards);
3016 sRefSet fguards = guardSet_getFalseGuards (guards);
3017 bool mustReturnT = exprNode_mustEscape (tbranch);
3018 bool mustReturnF = exprNode_mustEscape (fbranch);
3020 DPRINTF (("Pop branches: %s [mustreturn: %s/%s]", exprNode_unparse (pred),
3021 bool_unparse (mustReturnT),
3022 bool_unparse (mustReturnF)));
3024 if (exprNode_isDefined (fbranch))
3026 loc = exprNode_loc (fbranch);
3030 loc = exprNode_loc (tbranch);
3033 llassert (usymtab_isDefined (ttab));
3037 llassert (usymtab_isDefined (env));
3038 llassert (ftab->kind == US_FBRANCH);
3039 llassert (ttab->kind == US_TBRANCH);
3042 ** For each element that is true guarded (i.e., if (x != NULL))
3043 ** make x = null in false branch,
3044 ** and x = notnull in true branch.
3045 ** unless x was set locally in that branch.
3046 ** For each element that is false guarded (x == NULL)
3047 ** make x = null in true, notnull in false.
3049 ** For each element that is either guarded (pred(x))
3053 sRefSet_allElements (tguards, el)
3055 updateNullState (el, ttab, ftab, TRUE);
3056 } end_sRefSet_allElements;
3058 sRefSet_allElements (fguards, el)
3060 updateNullState (el, ttab, ftab, FALSE);
3061 } end_sRefSet_allElements;
3065 ** if an entry is in both true and false, merge the entries,
3066 ** then replace original with new state.
3068 ** if an entry is in one table, merge it with the original.
3071 DPRINTF (("ftab: %d", ftab->nentries));
3073 for (i = 0; i < ftab->nentries; i++)
3075 uentry fthis = ftab->entries[i];
3076 uentry old = usymtab_lookupAux (env, uentry_rawName (fthis));
3077 usymId tindex = usymtab_getIndex (ttab, uentry_rawName (fthis));
3079 DPRINTF (("Entry: %s / %s", uentry_unparseFull (fthis), uentry_unparseFull (old)));
3081 if (uentry_isUndefined (old))
3083 /* possible entry was added as an undefined id */
3084 DPRINTF (("Undefined! %s", uentry_rawName (fthis)));
3088 if (usymtab_indexFound (tindex))
3090 uentry tthis = ttab->entries[tindex];
3092 /* note that is this is in a nested branch,
3093 it may create a "new" old entry. */
3099 uentry_mergeState (fthis, tthis, loc,
3100 mustReturnT, FALSE, FALSE, cl);
3104 uentry_mergeUses (fthis, tthis);
3107 uentry_setState (old, fthis);
3114 uentry_setState (old, tthis);
3115 uentry_mergeState (old, fthis, loc, mustReturnF,
3119 ttab->entries[tindex] = uentry_undefined;
3120 uentry_free (tthis);
3124 uentry_mergeState (old, fthis, loc, mustReturnF, TRUE, FALSE, cl);
3128 for (i = 0; i < ttab->nentries; i++)
3130 uentry current = ttab->entries[i];
3132 DPRINTF (("ttab: %s", uentry_unparseFull (current)));
3134 if (!uentry_isUndefined (current))
3136 uentry old = usymtab_lookupAux (env, uentry_rawName (current));
3138 DPRINTF (("Old: %s", uentry_unparseFull (old)));
3140 if (uentry_isUndefined (old))
3142 llcontbug (message ("Undefined entry: %s", uentry_rawName (current)));
3148 uentry_mergeUses (current, old);
3149 uentry_setState (old, current);
3154 ** Assumes false branch is a fall-through if
3155 ** fbranch is not defined. This is true, unless
3156 ** where was some greivous error in processing
3157 ** the else branch of an if-then, in which case
3158 ** this is probably the right thing to do anyway.
3161 uentry_mergeState (old, current, loc, mustReturnT,
3165 DPRINTF (("==> %s", uentry_unparseFull (old)));
3170 ** Plain levelUnion doesn't work, since we need to use the sRef's in env->aliases
3171 ** if they are present.
3174 llassert (NOALIAS (env->aliases, ttab->aliases));
3175 llassert (NOALIAS (env->aliases, ftab->aliases));
3177 aliasTable_free (env->aliases);
3179 env->aliases = aliasTable_levelUnionNew (ttab->aliases,
3180 ftab->aliases, env->lexlevel);
3182 aliasTable_fixSrefs (env->aliases);
3184 DPRINTF (("Aliases: %s", aliasTable_unparse (env->aliases)));
3186 /* exit true and false scopes */
3187 usymtab_quietPlainExitScope ();
3188 usymtab_quietPlainExitScope ();
3192 utab->guards = guardSet_levelUnionFree
3194 guardSet_invert (exprNode_getGuards (pred)),
3200 utab->guards = guardSet_levelUnion (utab->guards,
3201 exprNode_getGuards (pred),
3205 DPRINTF (("Here."));
3208 static void usymtab_fixCases (void) /*@modifies utab@*/ {
3209 while (utab->kind == US_CBRANCH)
3211 usymtab_quietPlainExitScope ();
3214 llassert (utab->kind != US_CBRANCH);
3218 usymtab_altBranch (/*@only@*/ guardSet guards)
3222 usymtab parent = utab->env;
3224 t = usymtab_create (US_FBRANCH, utab, FALSE);
3227 ** If we are in a case, need to close it. The C syntax
3228 ** is very liberal, so this kludge is necessary.
3231 usymtab_fixCases ();
3233 DPRINTF (("Current kind: %s", usymtab_unparseStack ()));
3235 llassert (utab->kind == US_TBRANCH);
3236 llassert (parent != GLOBAL_ENV);
3238 guardSet_free (t->guards);
3241 aliasTable_free (t->aliases);
3242 t->aliases = aliasTable_copy (parent->aliases);
3248 usymtab_allDefined (void)
3249 /*@globals utab, globtab@*/
3253 llassert (utab == globtab);
3255 for (i = 0; i < utab->nentries; i++)
3257 uentry e = utab->entries[i];
3259 if (uentry_isPriv (e))
3261 ; /* no need to define it */
3265 if (context_getFlag (FLG_SPECUNDECL))
3267 fileloc sloc = uentry_whereSpecified (e);
3268 fileloc dloc = uentry_whereDeclared (e);
3270 if (fileloc_isDefined (sloc)
3271 && !uentry_isFakeTag (e)
3272 && !fileloc_isDefined (dloc))
3276 message ("%s %q specified but not declared",
3277 ekind_capName (uentry_getKind (e)),
3278 uentry_getName (e)),
3283 if (!uentry_isCodeDefined (e))
3285 fileloc dloc = uentry_whereDeclared (e);
3287 if (fileloc_isLib (dloc) || fileloc_isXHFile (dloc))
3291 else if (fileloc_isDefined (dloc))
3293 if (!uentry_isAnyTag (e))
3295 if (fileloc_isUser (dloc))
3299 message ("%s %q declared but not defined",
3300 ekind_capName (uentry_getKind (e)),
3301 uentry_getName (e)),
3303 DPRINTF (("decl: %s", uentry_unparseFull (e)));
3309 fileloc sloc = uentry_whereSpecified (e);
3311 if (fileloc_isDefined (sloc)
3312 && !fileloc_isImport (sloc)
3313 && !fileloc_isLib (sloc)
3314 && !fileloc_isPreproc (sloc)
3315 && !uentry_isFakeTag (e))
3317 if (uentry_isVariable (e) || uentry_isFunction (e))
3321 message ("%s %q specified but not declared or defined",
3322 ekind_capName (uentry_getKind (e)),
3323 uentry_getName (e)),
3330 message ("%s %q specified but not defined",
3331 ekind_capName (uentry_getKind (e)),
3332 uentry_getName (e)),
3342 void usymtab_exportHeader (void)
3347 for (i = 0; i < utab->nentries; i++)
3349 uentry ce = utab->entries[i];
3351 if (!uentry_isDatatype (ce)
3352 && !uentry_isAnyTag (ce)
3353 && !uentry_isEitherConstant (ce) && !uentry_isStatic (ce)
3354 && !uentry_isExternal (ce)
3355 && !uentry_isForward (ce))
3357 fileloc fwhere = uentry_whereDeclared (ce);
3359 if (fileloc_isUndefined (fwhere)
3360 && uentry_isFunction (ce))
3362 fwhere = uentry_whereDefined (ce);
3365 if (fileloc_isDefined (fwhere)
3366 && !fileloc_isHeader (fwhere)
3367 && !fileloc_isXHFile (fwhere)
3368 && !(fileloc_isSpecialFile (fwhere)
3369 && !context_getFlag (FLG_UNUSEDSPECIAL)))
3371 if (uentry_isVariable (ce))
3374 (FLG_EXPORTHEADERVAR,
3375 message ("%s %q exported but not declared in header file",
3376 ekind_capName (uentry_getKind (ce)),
3377 uentry_getName (ce)),
3380 uentry_showDefSpecInfo (ce, fwhere);
3385 if (!uentry_isIter (ce)
3386 && !uentry_isEndIter (ce)
3387 && !uentry_isExpandedMacro (ce))
3389 if (uentry_isFunction (ce)
3390 && cstring_equalLit (uentry_rawName (ce), "main"))
3392 ; /* no error for main */
3398 message ("%s %q exported but not declared "
3400 ekind_capName (uentry_getKind (ce)),
3401 uentry_getName (ce)),
3404 uentry_showDefSpecInfo (ce, fwhere);
3414 void usymtab_exportLocal (void)
3419 for (i = 0; i < utab->nentries; i++)
3421 uentry ce = utab->entries[i];
3423 if (!uentry_isDatatype (ce) && !uentry_isAnyTag (ce)
3424 && !uentry_isEitherConstant (ce)
3425 && !uentry_isIter (ce)
3426 && !uentry_isEndIter (ce)
3427 && !uentry_isExpandedMacro (ce)
3428 && uentry_isUsed (ce))
3430 /* check static uses */
3431 filelocList fuses = uentry_getUses (ce);
3432 fileloc mod = uentry_whereDefined (ce);
3433 bool ok = filelocList_isEmpty (fuses);
3434 fileloc fwhere = uentry_whereDeclared (ce);
3436 if (fileloc_isSpecialFile (fwhere)
3437 && !context_getFlag (FLG_UNUSEDSPECIAL))
3439 ok = TRUE; /* no errors for special files */
3443 filelocList_elements (fuses, uloc)
3445 if (fileloc_isUndefined (uloc) || !fileloc_sameModule (uloc, mod))
3448 /*@innerbreak@*/ break;
3450 } end_filelocList_elements;
3457 message ("%s exported but not used outside %s: %q",
3458 ekind_capName (uentry_getKind (ce)),
3459 fileloc_getBase (mod),
3460 uentry_getName (ce)),
3463 uentry_showDefSpecInfo (ce, fwhere);
3471 usymtab_allUsed (void)
3475 bool isFileStatic = usymtab_inFileScope ();
3476 cstring last_file = cstring_undefined;
3478 for (i = 0; i < utab->nentries; i++)
3480 bool hasError = FALSE;
3481 uentry ce = utab->entries[i];
3482 fileloc fwhere = uentry_whereDeclared (ce);
3484 if (fileloc_isUndefined (fwhere))
3486 fwhere = uentry_whereDefined (ce);
3489 if (fileloc_isInvalid (fwhere)
3490 || fileloc_isLib (fwhere)
3491 || fileloc_isBuiltin (fwhere)
3492 || ((fileloc_isSpecialFile (fwhere)
3493 || fileloc_isSpecialFile (uentry_whereDefined (ce)))
3494 && !context_getFlag (FLG_UNUSEDSPECIAL)))
3498 else if (!uentry_wasUsed (ce) && !uentry_isAnyTag (ce))
3500 cstring fname = fileloc_filename (fwhere);
3502 if (cstring_isUndefined (last_file))
3506 else if (cstring_equal (fname, last_file))
3515 if (uentry_isParam (ce))
3517 if (context_inMacro ())
3519 sRef cref = uentry_getSref (ce);
3521 if (uentry_isYield (ce))
3523 ; /* no checks (for now) */
3525 else if (sRef_isSafe (cref))
3531 if (uentry_hasRealName (ce))
3534 optgenerror (FLG_MACROPARAMS,
3535 message ("Macro parameter %q not used",
3536 uentry_getName (ce)),
3543 if (cstring_equalFree (uentry_getName (ce),
3544 cstring_makeLiteral ("...")))
3550 hasError = optgenerror (FLG_PARAMUNUSED,
3551 message ("Parameter %q not used",
3552 uentry_getName (ce)),
3557 else if (uentry_isFunction (ce) || uentry_isIter (ce))
3559 if (fileloc_isUser (fwhere))
3561 hasError = optgenerror
3563 message ("%q %q declared but not used",
3565 (uentry_isIter (ce) ? "Iterator"
3566 : (isFileStatic ? "File static function" : "Function")),
3567 uentry_getName (ce)),
3571 else if (uentry_isEndIter (ce))
3573 ; /* no error (already reported for iter */
3575 else if (uentry_isEnumConstant (ce))
3577 if (fileloc_isUser (fwhere))
3579 hasError = optgenerror
3581 message ("Enum member %q not used",
3582 uentry_getName (ce)),
3586 else if (uentry_isConstant (ce))
3588 if (fileloc_isUser (fwhere))
3590 hasError = optgenerror
3592 message ("Constant %q declared but not used",
3593 uentry_getName (ce)),
3597 else if (uentry_isDatatype (ce))
3599 if (fileloc_isUser (fwhere))
3601 hasError = optgenerror
3603 message ("Type %q declared but not used",
3604 uentry_getName (ce)),
3608 else if (!uentry_isRefParam (ce) && !uentry_isExpandedMacro (ce))
3609 { /* errors for ref params will be reported in the next scope */
3610 llassertprint (uentry_isVar (ce),
3611 ("ce: %s", uentry_unparseFull (ce)));
3613 if (ctype_isFunction (uentry_getType (ce)))
3615 if (fileloc_isUser (fwhere))
3617 hasError = optgenerror
3619 message ("%q %q declared but not used",
3621 (isFileStatic ? "File static function"
3623 uentry_getName (ce)),
3629 if (fileloc_isUser (fwhere))
3633 hasError = optgenerror
3635 message ("%q %q declared but not used",
3637 (isFileStatic ? "File static variable"
3639 uentry_getName (ce)),
3649 else if ((uentry_isDatatype (ce) || uentry_isAnyTag (ce)))
3650 { /* check all fields */
3651 ctype ct = uentry_getRealType (ce);
3654 while (ctype_isAP (ct))
3656 ct = ctype_getBaseType (ct);
3659 if (ctype_isSU (ct))
3661 uentryList fields = ctype_getFields (ct);
3663 uentryList_elements (fields, field)
3665 if (!uentry_isUsed (field))
3667 if (uentry_hasName (ce))
3669 hasError |= optgenerror
3671 message ("Field %q of %s %q declared but not used",
3672 uentry_getName (field),
3673 cstring_makeLiteralTemp
3674 (ctype_isStruct (ct) ? "structure" : "union"),
3675 uentry_getName (ce)),
3676 uentry_whereEarliest (field));
3682 ** Can't report these errors for unnamed structs.
3683 ** No way to tell when there are multiple consistent
3684 ** unnamed structure types. (Could go through table
3685 ** and mark them all unused...)
3687 hasError |= optgenerror
3689 message ("Field %q of unnamed %s declared but not used",
3690 uentry_getName (field),
3691 cstring_makeLiteralTemp
3692 (ctype_isStruct (ct) ? "structure" : "union")),
3693 uentry_whereEarliest (field));
3698 uentry_setUsed (field, fileloc_undefined);
3700 } end_uentryList_elements;
3710 if (uentry_isParam (ce) && context_inMacro ())
3712 if (fileloc_isDefined (uentry_whereSpecified (ce)))
3714 uentry_showWhereSpecified (ce);
3719 uentry_showDefSpecInfo (ce, fwhere);
3722 uentry_setUsed (ce, fileloc_undefined);
3728 checkGlobalReturn (uentry glob, sRef orig)
3730 sRef sr = uentry_getSref (glob);
3732 DPRINTF (("Check global return: %s / orig: %s / sr: %s",
3733 uentry_unparseFull (glob),
3734 sRef_unparseFull (orig),
3735 sRef_unparseFull (sr)));
3737 DPRINTF (("Is killed: %s", bool_unparse (sRef_isKilledGlob (orig))));
3739 if (context_getFlag (FLG_GLOBSTATE))
3741 DPRINTF (("Is killed: %s", sRef_unparseFull (orig)));
3743 if (sRef_isKilledGlob (orig))
3745 if (sRef_isStateUndefined (sr)
3746 || sRef_isUnuseable (sr)
3747 || sRef_isStateUnknown (sr)
3748 || sRef_isDead (sr))
3754 ctype ct = ctype_realType (uentry_getType (glob));
3756 DPRINTF (("Check global destroyed: %s", uentry_unparseFull (glob)));
3758 if (ctype_isVisiblySharable (ct))
3763 ("Killed global %q (type %s) not released before return",
3764 uentry_getName (glob),
3765 ctype_unparse (ct)),
3768 sRef_showStateInfo (sr);
3773 sRef_protectDerivs ();
3774 (void) transferChecks_globalDestroyed (sr, g_currentloc);
3775 sRef_clearProtectDerivs ();
3781 if (sRef_isStateUndefined (sr))
3783 if (optgenerror (FLG_GLOBSTATE,
3785 ("Function returns with global %q undefined",
3786 uentry_getName (glob)),
3789 sRef_showStateInfo (sr);
3794 if (sRef_isDead (sr) || sRef_isKept (sr))
3798 message ("Function returns with global %q "
3799 "referencing %s storage",
3800 uentry_getName (glob),
3801 cstring_makeLiteralTemp (sRef_isDead (sr) ? "released" : "kept")),
3804 if (sRef_isKept (sr))
3806 sRef_showAliasInfo (sr);
3810 sRef_showStateInfo (sr);
3813 sRef_setDefState (sr, SS_UNKNOWN, fileloc_undefined);
3817 if (ctype_isRealPointer (uentry_getType (glob))
3818 && sRef_possiblyNull (sr)
3819 && !uentry_possiblyNull (glob))
3823 message ("Function returns with non-null global %q "
3824 "referencing null storage",
3825 uentry_getName (glob)),
3828 sRef_showNullInfo (sr);
3833 DPRINTF (("Check transfer: %s", uentry_unparseFull (glob)));
3834 transferChecks_globalReturn (glob);
3842 ** remember: check alias globals
3845 void usymtab_checkFinalScope (bool isReturn)
3848 bool mustDefine = context_getFlag (FLG_MUSTDEFINE);
3849 sRefSet checked = sRefSet_new ();
3850 usymtab stab = utab;
3854 ** need to check all scopes out to function parameters.
3859 for (i = 0; i < stab->nentries; i++)
3861 uentry ce = stab->entries[i];
3862 sRef sr = uentry_getSref (ce);
3863 sRef rb = sRef_getRootBase (sr);
3867 ** Shouldn't check if shadow checked in deeper scope:
3872 uentry oue = usymtab_lookupQuietNoAlt (utab, uentry_observeRealName (ce));
3874 if (!uentry_sameObject (ce, oue))
3876 /* what if it is one an alternate branch? */
3877 /*@innercontinue@*/ continue;
3881 DPRINTF (("Here check final scope: %s", uentry_unparseFull (ce)));
3883 if (ctype_isFunction (uentry_getType (ce)))
3885 /*@innercontinue@*/ continue;
3888 if (uentry_isAnyParam (ce)
3889 || uentry_isRefParam (ce)
3890 || sRef_isFileOrGlobalScope (rb))
3892 /* Don't do the loseref check...but should check state! */
3893 DPRINTF (("Skipping check 1"));
3895 else if (sRef_isDefinitelyNull (sr)
3896 || usymtab_isDefinitelyNull (sr))
3899 ** No state reference errors for definitely null references.
3902 DPRINTF (("Skipping check 2"));
3906 DPRINTF (("Lose ref: %s / %s", uentry_unparse (ce),
3907 sRef_unparseFull (sr)));
3909 tvalues = sRef_getValueTable (sr);
3911 valueTable_elements (tvalues, fkey, fval) {
3912 metaStateInfo minfo;
3913 cstring msg = cstring_undefined;
3916 minfo = context_lookupMetaStateInfo (fkey);
3917 llassert (metaStateInfo_isDefined (minfo));
3919 if (stateValue_isError (fval)
3920 || sRef_isStateUndefined (sr)) /* No errors for undefined state */
3922 DPRINTF (("Skipping check 3"));
3926 DPRINTF (("Check: %s / %s / %s", fkey,
3927 metaStateInfo_unparse (minfo),
3928 stateValue_unparse (fval)));
3930 minfo = context_lookupMetaStateInfo (fkey);
3932 nval = stateCombinationTable_lookupLoseReference
3933 (metaStateInfo_getTransferTable (minfo),
3934 stateValue_getValue (fval), &msg);
3936 if (cstring_isDefined (msg))
3941 ("%s loses reference %q in invalid state %q (%s)",
3942 cstring_makeLiteralTemp (isReturn ? "Return" : "Scope exit"),
3943 uentry_getName (ce),
3944 stateValue_unparseValue (fval, minfo),
3948 stateValue_show (fval, minfo);
3952 DPRINTF (("Suppressed transfer error: %s", msg));
3956 } end_valueTable_elements;
3959 DPRINTF (("Check mustfree entry: %s", uentry_unparseFull (ce)));
3961 if (!sRefSet_member (checked, sr) && !sRef_isFileOrGlobalScope (rb))
3963 if (ctype_isRealSU (uentry_getType (ce))
3964 && !uentry_isAnyParam (ce)
3965 && !uentry_isRefParam (ce)
3966 && !uentry_isStatic (ce)
3967 && !sRef_isDependent (sr)
3968 && !sRef_isOwned (sr))
3970 sRefSet als = usymtab_allAliases (sr);
3972 if (sRefSet_isEmpty (als))
3974 transferChecks_localDestroyed (sr, g_currentloc);
3978 /* aliased, no problem */ ;
3984 (!uentry_isStatic (ce)
3985 && ((sRef_isNewRef (sr))
3986 || (((sRef_isOnly (sr) || sRef_isFresh (sr)
3987 || sRef_isKeep (sr) || sRef_isOwned (sr))
3988 && !sRef_isDead (sr))
3989 && (!sRef_definitelyNull (sr))
3990 && (!usymtab_isDefinitelyNull (sr)))))
3992 bool hasError = TRUE;
3994 DPRINTF (("Checking: %s", sRef_unparseFull (sr)));
3997 ** If its a scope exit, check if there is an alias.
3998 ** If so, make it only. If not, there is an error.
4003 if (transferChecks_canLoseReference (sr, g_currentloc))
4005 DPRINTF (("Can lose!"));
4012 if (sRef_hasLastReference (sr))
4014 sRef ar = sRef_getAliasInfoRef (sr);
4017 (sRef_isFresh (ar) ? FLG_MUSTFREEFRESH : FLG_MUSTFREEONLY,
4019 ("Last reference %q to %s storage %qnot %q before %q",
4021 alkind_unparse (sRef_getAliasKind (sr)),
4022 sRef_unparseOpt (ar),
4023 cstring_makeLiteral (sRef_isKeep (sr)
4024 ? "transferred" : "released"),
4025 cstring_makeLiteral (isReturn
4026 ? "return" : "scope exit")),
4029 sRef_showRefLost (sr);
4032 else if (sRef_isNewRef (sr))
4035 (sRef_isFresh (sr) ? FLG_MUSTFREEFRESH : FLG_MUSTFREEONLY,
4037 ("%q %q not released before %q",
4039 (alkind_isKillRef (sRef_getOrigAliasKind (sr))
4040 ? "Kill reference parameter" : "New reference"),
4041 uentry_getName (ce),
4042 cstring_makeLiteral (isReturn
4043 ? "return" : "scope exit")),
4046 sRef_showAliasInfo (sr);
4051 if (ctype_isRealSU (sRef_getType (sr)))
4053 transferChecks_structDestroyed (sr, g_currentloc);
4058 (sRef_isFresh (sr) ? FLG_MUSTFREEFRESH : FLG_MUSTFREEONLY,
4060 ("%s storage %q not %q before %q",
4061 alkind_capName (sRef_getAliasKind (sr)),
4062 uentry_getName (ce),
4063 cstring_makeLiteral (sRef_isKeep (sr)
4064 ? "transferred" : "released"),
4065 cstring_makeLiteral (isReturn
4066 ? "return" : "scope exit")),
4069 sRef_showAliasInfo (sr);
4070 DPRINTF (("Storage: %s", sRef_unparseFull (sr)));
4082 if (mustDefine && uentry_isOut (ce))
4084 /* No error if its dead (either only or error already reported */
4085 if (!sRef_isReallyDefined (sr) && !sRef_isDead (sr))
4089 message ("Out storage %q not defined before %q",
4090 uentry_getName (ce),
4092 (isReturn ? "return" : "scope exit")),
4095 DPRINTF (("sr: %s", sRef_unparseFull (sr)));
4100 ** also check state is okay
4103 if (usymtab_lexicalLevel () > functionScope
4104 && uentry_isVariable (ce)
4105 && (sRef_isLocalVar (sr)
4106 && (sRef_isDependent (sr) || sRef_isLocalState (sr))))
4108 sRefSet ab = usymtab_aliasedBy (sr);
4110 /* should do something more efficient here */
4112 if (sRefSet_isEmpty (ab))
4114 /* and no local ref */
4115 DPRINTF (("Check lose ref: %s", uentry_unparseFull (ce)));
4116 transferChecks_loseReference (ce);
4130 checked = sRefSet_insert (checked, sr);
4133 llassert (usymtab_isDefined (stab->env));
4135 if (usymtab_isBranch (stab))
4137 stab = usymtab_dropEnv (stab);
4144 llassert (stab != usymtab_undefined);
4145 } while (isReturn && (stab->lexlevel >= paramsScope));
4147 sRefSet_free (checked);
4151 ** all globals are appropriately defined
4152 ** all parameters are appropriately defined
4153 ** special clauses are followed
4156 if (isReturn || (utab->lexlevel == paramsScope))
4158 uentry fcn = context_getHeader ();
4159 uentryList params = context_getParams ();
4160 globSet uglobs = context_getUsedGlobs ();
4161 globSet sglobs = context_getGlobs ();
4163 if (isReturn && context_maybeSet (FLG_GLOBALIAS))
4165 aliasTable_checkGlobs (utab->aliases);
4169 ** state clauses (ensures, defines, sets, allocates, releases)
4172 if (uentry_hasStateClauseList (fcn))
4174 stateClauseList clauses = uentry_getStateClauseList (fcn);
4176 stateClauseList_elements (clauses, cl)
4178 if (stateClause_isAfter (cl) && !stateClause_isGlobal (cl))
4180 if (stateClause_setsMetaState (cl))
4182 sRefSet rfs = stateClause_getRefs (cl);
4183 qual q = stateClause_getMetaQual (cl);
4184 annotationInfo ainfo = qual_getAnnotationInfo (q);
4185 metaStateInfo minfo = annotationInfo_getState (ainfo);
4186 cstring key = metaStateInfo_getName (minfo);
4187 int mvalue = annotationInfo_getValue (ainfo);
4189 DPRINTF (("Post meta state clause: %s", stateClause_unparse (cl)));
4191 sRefSet_elements (rfs, el)
4193 sRef base = sRef_getRootBase (el);
4195 if (sRef_isResult (base))
4198 ** This is checked for return transfers.
4202 else if (sRef_isParam (base) || sRef_isGlobalMarker (base))
4204 sRef sr = sRef_updateSref (base);
4205 sr = sRef_fixBase (el, sr);
4207 if (!sRef_checkMetaStateValue (sr, key, mvalue))
4212 ("Ensures clause not satisfied%q (state is %q): %q",
4213 sRef_isGlobalMarker (sr)
4215 : message (" by %q", sRef_unparse (sr)),
4216 stateValue_unparseValue (sRef_getMetaStateValue (sr, key),
4218 stateClause_unparse (cl)),
4221 sRef_showMetaStateInfo (sr, key);
4227 if (sRef_isMeaningful (el))
4232 } end_sRefSet_elements ;
4236 /* evs - 2000 07 10 - added this */
4237 sRefTest tst = stateClause_getPostTestFunction (cl);
4238 sRefSet rfs = stateClause_getRefs (cl);
4240 sRefSet_elements (rfs, el)
4242 sRef base = sRef_getRootBase (el);
4244 if (sRef_isResult (base))
4247 ** This is checked for return transfers.
4252 else if (sRef_isParam (base))
4254 sRef sr = sRef_updateSref (base);
4255 sr = sRef_fixBase (el, sr);
4257 if (tst != NULL && !tst (sr))
4260 (stateClause_postErrorCode (cl),
4261 message ("%s storage %qcorresponds to "
4262 "storage listed in %q clause",
4263 stateClause_postErrorString (cl, sr),
4264 sRef_unparseOpt (sr),
4265 stateClause_unparseKind (cl)),
4268 sRefShower ss = stateClause_getPostTestShower (cl);
4275 DPRINTF (("Storage: %s", sRef_unparseFull (sr)));
4281 if (sRef_isMeaningful (el))
4286 } end_sRefSet_elements ;
4289 } end_stateClauseList_elements ;
4293 ** check parameters on return
4296 uentryList_elements (params, arg)
4298 if (!uentry_isElipsisMarker (arg))
4300 ctype rt = ctype_realType (uentry_getType (arg));
4302 if (ctype_isMutable (rt) || ctype_isSU (rt))
4304 uentry param = usymtab_lookupQuiet (utab, uentry_rawName (arg));
4305 DPRINTF (("Check param return: %s", uentry_unparseFull (param)));
4306 transferChecks_paramReturn (param);
4309 } end_uentryList_elements;
4311 DPRINTF (("Check global return: %s",
4312 globSet_unparse (sglobs)));
4314 globSet_allElements (sglobs, el)
4316 sRef orig = el; /*! sRef_updateSref (el); */ /*!!!*/
4317 uentry current = sRef_getUentry (el);
4319 DPRINTF (("Check global return: %s / %s", sRef_unparseFull (el),
4320 uentry_unparseFull (current)));
4322 if (uentry_isVariable (current) && !uentry_isRealFunction (current))
4324 checkGlobalReturn (current, orig);
4326 } end_globSet_allElements;
4328 globSet_allElements (uglobs, el)
4330 if (!globSet_member (sglobs, el))
4332 uentry current = sRef_getUentry (el);
4334 if (uentry_isVariable (current)
4335 && !uentry_isRealFunction (current))
4337 checkGlobalReturn (current, sRef_undefined);
4340 } end_globSet_allElements;
4345 usymtab_quietExitScope (fileloc loc)
4346 /*@globals utab, globtab, filetab; @*/
4349 usymtab t = utab->env;
4351 DPRINTF (("Quiet exit scope [%p]", utab));
4353 if (utab->reftable != NULL)
4357 for (i = 0; i < utab->nentries; i++)
4359 uentry current = utab->entries[i];
4360 uentry old = usymtab_lookupAux (t, uentry_rawName (current));
4362 uentry_mergeState (old, current, loc, FALSE, FALSE, FALSE, NOCLAUSE);
4366 llassert (t != NULL);
4368 if (t->lexlevel > paramsScope)
4370 t->guards = guardSet_levelUnion (t->guards, utab->guards, t->lexlevel);
4371 t->aliases = aliasTable_levelUnionSeq (t->aliases, utab->aliases,
4373 utab->aliases = aliasTable_undefined;
4376 t->mustBreak = utab->mustBreak;
4377 t->exitCode = utab->exitCode;
4379 DPRINTF (("Free level [%p]", utab));
4380 usymtab_freeLevel (utab);
4385 usymtab_checkAllValid ();
4390 ** Exit a scope with no checking, lose alias states.
4391 ** (When should this be used?)
4394 void usymtab_quietPlainExitScope (void)
4395 /*@globals utab, globtab, filetab@*/
4398 usymtab t = utab->env;
4400 llassert (t != NULL);
4401 llassert (NOALIAS (utab->aliases, t->aliases));
4402 usymtab_freeLevel (utab);
4406 void usymtab_exitScope (exprNode expr)
4407 /*@globals utab, filetab, globtab@*/
4408 /*@modifies utab, globtab@*/
4410 usymtab ctab = usymtab_undefined;
4411 usymtab lctab = usymtab_undefined;
4412 bool mustReturn = exprNode_mustEscape (expr);
4414 DPRINTF (("Exit scope [%p]", utab));
4416 if (utab->kind == US_CBRANCH)
4419 ** save the case branches, remove the first non-cbranch
4424 while (utab->kind == US_CBRANCH)
4428 llassert (utab != GLOBAL_ENV);
4432 if (utab->kind == US_TBRANCH || utab->kind == US_FBRANCH
4433 || utab->kind == US_CBRANCH || utab->kind == US_SWITCH)
4435 if (context_inMacro ())
4437 /* evs 2000-07-25 */
4438 /* Unparseable macro may end inside nested scope. Deal with it. */
4440 llerror (FLG_SYNTAX,
4441 message ("Problem parsing macro body of %s (unbalanced scopes). "
4442 "Attempting to recover, recommend /*@notfunction@*/ before "
4443 "macro definition.",
4444 context_inFunctionName ()));
4446 while (utab->kind == US_TBRANCH
4447 || utab->kind == US_FBRANCH
4448 || utab->kind == US_CBRANCH
4449 || utab->kind == US_SWITCH)
4452 llassert (utab != GLOBAL_ENV);
4456 llcontbug (message ("exitScope: in branch: %q", usymtab_unparseStack ()));
4458 } /*@=branchstate@*/
4462 ** check all variables in scope were used
4466 ** bogus errors if this is the normal inside a switch,
4467 ** since cases have not been merged yet. Should probably
4468 ** still check this, but I'm too lazy at the moment...
4471 llassertfatal (utab->env != GLOBAL_ENV);
4473 if (utab->env->kind != US_SWITCH)
4479 ** check aliasing: all only params are released (dead)
4480 ** definition: all out params are defined, all modified params
4481 ** are completely defined
4483 ** NOTE: note for exiting paramsScope, since checkReturn should be
4487 if (!mustReturn && (usymtab_lexicalLevel () > functionScope))
4490 ** should only call this is end of scope is reachable...
4493 usymtab_checkFinalScope (FALSE);
4496 if (usymtab_lexicalLevel () == paramsScope && context_inFunctionLike ())
4499 ** leaving a function, need to fix up globals
4502 uentryList params = context_getParams ();
4503 globSet globs = context_getUsedGlobs ();
4505 uentryList_elements (params, ue)
4507 uentry_fixupSref (ue);
4508 } end_uentryList_elements;
4510 clearFunctionTypes ();
4512 DPRINTF (("Fixing up globals: %s", globSet_unparse (globs)));
4514 globSet_allElements (globs, el)
4516 DPRINTF (("Fix: %s", sRef_unparseDebug (el)));
4518 if (sRef_isCvar (el))
4521 usymId index = sRef_getScopeIndex (el);
4523 if (sRef_isFileStatic (el))
4525 llassert (usymtab_isDefined (filetab));
4526 current = usymtab_fetchIndex (filetab, index);
4530 current = usymtab_fetchIndex (globtab, index);
4533 if (uentry_isVariable (current))
4535 DPRINTF (("Fixup: %s", uentry_unparse (current)));
4536 uentry_fixupSref (current);
4540 DPRINTF (("Clear: %s", uentry_getSref (current)));
4541 sRef_clearDerived (uentry_getSref (current));
4545 sRef_clearDerived (el); /* evans 2002-03-14 - this is the likely source of many crashes! */
4546 } end_globSet_allElements;
4549 usymtab_quietExitScope (exprNode_loc (expr));
4551 if (lctab != usymtab_undefined)
4553 /*@i@*/ lctab->env = utab;
4554 /*@i@*/ utab = ctab;
4555 /*@-branchstate@*/ } /*@=branchstate@*/
4560 usymtab_checkAllValid ();
4566 ** yikes! don't let the '170 kids see this one...
4570 usymtab_directParamNo (uentry ue)
4572 if (uentry_isVar (ue))
4574 sRef sr = uentry_getSref (ue);
4576 if (sRef_lexLevel (sr) == functionScope)
4578 usymId index = sRef_getScopeIndex (sr);
4580 if (index < usymId_fromInt (uentryList_size (context_getParams ())))
4586 return usymId_invalid;
4589 /*@dependent@*/ /*@exposed@*/ uentry
4590 usymtab_getParam (int paramno)
4594 ** requires in a function context (checked)
4596 ** depends on no nested functions --- the function
4597 ** parameters are ALWAYS one scope inside the global scope
4598 ** and entered in order!
4602 if (!context_inFunctionLike ())
4603 llfatalbug (message ("usymtab_getParam: not in function context: %q",
4604 context_unparse ()));
4606 while (s->lexlevel > paramsScope)
4611 llassert (usymtab_isDefined (s));
4613 if (paramno >= s->nentries)
4616 ** Parse errors lead to this.
4619 uentry err = uentry_makeVariableLoc (cstring_makeLiteralTemp ("<error>"),
4622 uentry_markOwned (err);
4626 return (s->entries[paramno]);
4629 static /*@dependent@*/ /*@exposed@*/ uentry
4630 usymtab_getRefTab (/*@notnull@*/ usymtab u, int level, usymId index)
4634 ue = usymtab_getRefNoisy (u, level, index);
4636 if (uentry_isUndefined (ue))
4638 llbug (message ("usymtab_getRef: out of range: %d. level = %d",
4645 static /*@dependent@*/ /*@exposed@*/ usymtab
4646 usymtab_dropEnv (/*@notnull@*/ usymtab s)
4648 if (s->kind == US_CBRANCH)
4656 llassert (s != GLOBAL_ENV);
4657 } while (s->kind == US_CBRANCH);
4658 /* drop all cases (except in nested scopes */
4661 llassert (s != GLOBAL_ENV);
4664 if (s->kind == US_FBRANCH)
4666 s = s->env; /* skip the true branch */
4667 llassert (usymtab_isDefined (s));
4668 llassert (s->kind == US_TBRANCH);
4671 llassert (s != GLOBAL_ENV);
4677 /*@dependent@*/ /*@exposed@*/ uentry
4678 usymtab_getRefQuiet (int level, usymId index)
4684 llassert (s != NULL);
4685 llassert (index >= 0);
4687 if (level > s->lexlevel)
4689 return uentry_undefined;
4692 llassertprint (level <= s->lexlevel, ("level: %d / lexlevel: %d",
4693 level, s->lexlevel));
4695 while (s->lexlevel > level)
4697 if (usymtab_isBranch (s))
4699 int eindex = refTable_lookup (s, level, index);
4701 if (eindex != NOT_FOUND)
4703 return (s->entries[eindex]);
4707 s = usymtab_dropEnv (s);
4710 while (usymtab_isBranch (s) && s->lexlevel == level)
4712 int eindex = refTable_lookup (s, level, index);
4714 if (eindex != NOT_FOUND)
4716 return (s->entries[eindex]);
4719 s = usymtab_dropEnv (s);
4722 if (index >= usymId_fromInt (s->nentries))
4724 return uentry_undefined;
4727 llassert (!uentry_isUndefined (s->entries[index]));
4729 return s->entries[index];
4732 static /*@dependent@*/ /*@exposed@*/ uentry
4733 usymtab_getRefNoisy (/*@notnull@*/ usymtab s, int level, usymId index)
4736 uentry ue = uentry_undefined;
4738 llassert (index >= 0);
4740 while (s->lexlevel > level)
4742 if (usymtab_isBranch (s))
4744 int eindex = refTable_lookup (s, level, index);
4746 if (eindex != NOT_FOUND)
4748 ue = s->entries[eindex];
4752 while (!usymtab_isBranch (otab))
4754 otab = usymtab_dropEnv (otab);
4755 llassert (otab != GLOBAL_ENV);
4758 if (refTable_lookup (otab, level, index) == NOT_FOUND)
4760 ue = usymtab_addRefEntry (otab, uentry_rawName (ue));
4772 s = usymtab_dropEnv (s);
4775 llassert (usymtab_isDefined (s));
4777 while (usymtab_isBranch (s) && s->lexlevel == level)
4779 int eindex = refTable_lookup (s, level, index);
4781 if (eindex != NOT_FOUND)
4783 ue = s->entries[eindex];
4787 while (!usymtab_isBranch (otab))
4789 otab = usymtab_dropEnv (otab);
4790 llassert (otab != GLOBAL_ENV);
4793 ue = usymtab_addRefEntry (otab, uentry_rawName (ue));
4803 s = usymtab_dropEnv (s);
4806 if (s->lexlevel == level && (index < usymId_fromInt (s->nentries)))
4808 ue = s->entries[index];
4810 if (uentry_isValid (ue))
4814 while (!usymtab_isBranch (otab))
4816 otab = usymtab_dropEnv (otab);
4818 if (otab == GLOBAL_ENV)
4824 ue = usymtab_addRefEntry (otab, uentry_rawName (ue));
4835 if (index >= usymId_fromInt (s->nentries))
4837 return uentry_undefined;
4840 llassert (!uentry_isUndefined (s->entries[index]));
4842 return s->entries[index];
4846 ** looking up entries
4848 ** If entry is inside a branch, then copy it, and put it into
4849 ** the branch table.
4853 int refTable_lookup (/*@notnull@*/ usymtab ut, int level, usymId index)
4855 refTable rt = ut->reftable;
4858 llassert (rt != NULL);
4860 for (i = 0; i < ut->nentries; i++)
4862 if (rt[i]->level == level && rt[i]->index == usymId_toInt (index))
4872 /*@only@*/ refentry refentry_create (int level, int index)
4874 refentry r = (refentry) dmalloc (sizeof (*r));
4882 static /*@dependent@*/ /*@exposed@*/ uentry
4883 usymtab_addRefEntry (/*@notnull@*/ usymtab s, cstring k)
4887 if (ut->reftable == NULL)
4889 DPRINTF (("Adding ref entry without reftable: %s", k));
4890 return uentry_undefined;
4893 llassert (ut->reftable != NULL);
4895 while (s != GLOBAL_ENV)
4897 usymId eindex = usymtab_getIndex (s, k);
4899 if (usymtab_indexFound (eindex))
4901 uentry current = s->entries[eindex];
4903 if (uentry_isVar (current) && !ctype_isFunction (uentry_getType (current)))
4907 DPRINTF (("Here: copying %s", uentry_unparse (current)));
4908 if (uentry_isNonLocal (current))
4910 ue = uentry_copy (current);
4914 ue = uentry_copyNoSave (current);
4917 DPRINTF (("Here: copying %s", uentry_unparse (ue)));
4918 usymtab_addEntryQuiet (ut, ue);
4919 DPRINTF (("Okay..."));
4921 if (s->reftable != NULL)
4923 refentry ref = s->reftable[eindex];
4925 ut->reftable[ut->nentries - 1]
4926 = refentry_create (ref->level, ref->index);
4930 ut->reftable[ut->nentries - 1]
4931 = refentry_create (s->lexlevel, usymId_toInt (eindex));
4942 s = usymtab_dropEnv (s);
4945 return uentry_undefined;
4948 static uentry usymtab_lookupAux (usymtab s, cstring k)
4950 DPRINTF (("Lookup: %s", k));
4952 while (s != GLOBAL_ENV)
4954 usymId eindex = usymtab_getIndex (s, k);
4956 if (usymtab_indexFound (eindex))
4958 uentry ret = s->entries[eindex];
4962 if (s->kind == US_TBRANCH
4963 || s->kind == US_FBRANCH
4964 || s->kind == US_CBRANCH)
4965 /* uentry_isGlobalVariable (ret) && os->lexlevel > fileScope) */
4968 DPRINTF (("Adding global ref entry: %s", k));
4969 ret = usymtab_addRefEntry (os, k);
4970 DPRINTF (("Adding ref entry: %s", uentry_unparseFull (ret)));
4975 DPRINTF (("Found: %s", uentry_unparseFull (ret)));
4979 if (s->kind == US_TBRANCH || s->kind == US_FBRANCH
4980 || s->kind == US_CBRANCH)
4982 /* why isn't this os??? */
4983 uentry ret = usymtab_addRefEntry (s, k);
4984 DPRINTF (("Adding ref entry: %s", uentry_unparseFull (ret)));
4991 return uentry_undefined;
4994 static /*@dependent@*/ /*@exposed@*/ uentry
4995 usymtab_lookupQuietAux (usymtab s, cstring k, bool noalt)
4997 while (s != GLOBAL_ENV)
4999 usymId eindex = usymtab_getIndex (s, k);
5001 if (usymtab_indexFound (eindex))
5003 uentry ret = s->entries[eindex];
5007 if (noalt && usymtab_isBranch (s))
5009 s = usymtab_dropEnv (s);
5013 llassert (s != NULL);
5018 return uentry_undefined;
5021 static /*@exposed@*/ /*@dependent@*/ uentry
5022 usymtab_lookupQuiet (usymtab s, cstring k)
5024 return usymtab_lookupQuietAux (s, k, FALSE);
5027 static /*@exposed@*/ /*@dependent@*/ uentry
5028 usymtab_lookupQuietNoAlt (usymtab s, cstring k)
5030 return usymtab_lookupQuietAux (s, k, TRUE);
5033 /*@dependent@*/ /*@observer@*/ uentry
5034 usymtab_lookupSafe (cstring k)
5037 DPRINTF (("Lookup safe: %s", k));
5038 return (usymtab_lookupAux (utab, k));
5042 usymtab_lookupExpose (cstring k)
5045 uentry ce = usymtab_lookupAux (utab, k);
5047 if (uentry_isUndefined (ce))
5049 llfatalbug (message ("usymtab_lookup: not found: *%s*", k));
5052 if (uentry_isPriv (ce))
5054 llfatalbug (message ("usymtab_lookup: private: *%s*", k));
5060 uentry usymtab_lookupExposeGlob (cstring k)
5062 return (usymtab_lookupGlobSafe (k));
5065 uentry usymtab_lookupGlob (cstring k)
5066 /*@globals globtab@*/
5068 uentry ce = usymtab_lookupAux (globtab, k);
5070 if (uentry_isUndefined (ce))
5071 llfatalbug (message ("usymtab_lookup: not found: %s", k));
5073 if (uentry_isPriv (ce))
5074 llfatalbug (message ("usymtab_lookup: private: %s", k));
5076 DPRINTF (("Lookup global: %s", uentry_unparseFull (ce)));
5080 /*@observer@*/ uentry
5081 usymtab_lookupGlobSafe (cstring k)
5082 /*@globals globtab@*/
5084 uentry ce = usymtab_lookupAux (globtab, k);
5085 DPRINTF (("Lookup global: %s", uentry_unparseFull (ce)));
5089 uentry usymtab_lookupEither (cstring k)
5092 uentry ce = usymtab_lookupSafe (k);
5094 if (uentry_isUndefined (ce))
5095 llfatalerror (message ("usymtab_lookup: not found: %s", k));
5097 DPRINTF (("Lookup either: %s", uentry_unparseFull (ce)));
5102 usymtab_lookupType (cstring k)
5103 /*@globals globtab@*/
5105 typeId uid = usymtab_getTypeId (k);
5107 if (typeId_isInvalid (uid))
5109 llcontbug (message ("usymtab_lookupType: not found: %s", k));
5110 return ctype_unknown;
5113 return (uentry_getRealType (usymtab_getTypeEntry (uid)));
5117 usymtab_lookupAbstractType (cstring k) /*@globals globtab@*/
5119 typeId uid = usymtab_getTypeId (k);
5121 if (typeId_isInvalid (uid))
5123 llcontbug (message ("usymtab_lookupType: not found: %s", k));
5124 return ctype_unknown;
5127 return (uentry_getAbstractType (usymtab_getTypeEntry (uid)));
5131 ** if there is an unnamed lcl-specified struct tag matching
5132 ** the uentryList, return its datatype. Otherwise, returns
5137 usymtab_structFieldsType (uentryList f)
5138 /*@globals globtab@*/
5140 return (usymtab_suFieldsType (f, TRUE));
5144 usymtab_unionFieldsType (uentryList f)
5145 /*@globals globtab@*/
5147 return (usymtab_suFieldsType (f, FALSE));
5151 usymtab_suFieldsType (uentryList f, bool isStruct)
5152 /*@globals globtab@*/
5156 DPRINTF (("Fields: %s", uentryList_unparse (f)));
5158 if (fileloc_isSpec (g_currentloc))
5160 return (ctype_undefined);
5163 for (i = 0; i < globtab->nentries; i++)
5165 uentry current = globtab->entries[i];
5168 ? uentry_isStructTag (current) : uentry_isUnionTag (current)))
5170 if (isFakeTag (uentry_rawName (current)))
5172 ctype ct = uentry_getType (current);
5174 DPRINTF (("Check: %s", ctype_unparse (ct)));
5176 if ((isStruct ? ctype_isStruct (ct) : ctype_isUnion (ct))
5178 (uentry_isSpecified (current)
5179 && uentryList_equivFields (f, ctype_getFields (ct))))
5181 return uentry_getAbstractType (current);
5191 return ctype_undefined;
5195 usymtab_enumEnumNameListType (enumNameList f)
5196 /*@globals globtab@*/
5200 for (i = 0; i < globtab->nentries; i++)
5202 uentry current = globtab->entries[i];
5204 if (uentry_isEnumTag (current))
5206 if (isFakeTag (uentry_rawName (current)))
5208 ctype ct = uentry_getType (current);
5210 if (ctype_isEnum (ct) && (enumNameList_match (f, ctype_elist (ct))))
5212 return uentry_getType (current);
5218 return ctype_undefined;
5222 usymtab_exists (cstring k)
5225 uentry ce = usymtab_lookupSafe (k);
5226 return (!(uentry_isUndefined (ce)) && !(uentry_isPriv (ce)));
5230 usymtab_existsReal (cstring k)
5233 uentry ce = usymtab_lookupSafe (k);
5235 return (!(uentry_isUndefined (ce))
5236 && !(uentry_isPriv (ce))
5237 && !(uentry_isExpandedMacro (ce)));
5241 usymtab_existsGlob (cstring k)
5242 /*@globals globtab@*/
5244 uentry ce = usymtab_lookupAux (globtab, k);
5246 return (!(uentry_isUndefined (ce)) && !(uentry_isPriv (ce)));
5250 usymtab_existsEither (cstring k)
5253 uentry ce = usymtab_lookupAux (utab, k);
5255 return (uentry_isValid (ce));
5259 usymtab_existsGlobEither (cstring k)
5260 /*@globals globtab@*/
5262 uentry ce = usymtab_lookupAux (globtab, k);
5264 return (uentry_isValid (ce));
5268 usymtab_existsType (cstring k)
5269 /*@globals globtab@*/
5271 uentry ce = usymtab_lookupAux (globtab, k);
5273 return (!(uentry_isUndefined (ce)) && !(uentry_isPriv (ce)) && uentry_isDatatype (ce));
5277 usymtab_existsTypeEither (cstring k)
5278 /*@globals globtab@*/
5281 ce = usymtab_lookupAux (globtab, k);
5282 return (uentry_isValid (ce) && uentry_isDatatype (ce));
5286 usymtab_existsStructTag (cstring k) /*@globals globtab@*/
5288 cstring sname = makeStruct (k);
5289 uentry ce = usymtab_lookupAux (globtab, sname);
5290 cstring_free (sname);
5291 return (!(uentry_isUndefined (ce)) && !(uentry_isPriv (ce)));
5295 usymtab_existsUnionTag (cstring k) /*@globals globtab@*/
5297 cstring uname = makeUnion (k);
5298 uentry ce = usymtab_lookupAux (globtab, uname);
5300 cstring_free (uname);
5302 return (!(uentry_isUndefined (ce)) && !(uentry_isPriv (ce)));
5306 usymtab_existsEnumTag (cstring k) /*@globals globtab@*/
5308 cstring ename = makeEnum (k);
5309 uentry ce = usymtab_lookupAux (globtab, ename);
5311 cstring_free (ename);
5312 return (!(uentry_isUndefined (ce)) && !(uentry_isPriv (ce)));
5315 bool usymtab_existsVar (cstring k)
5318 uentry ce = usymtab_lookupSafe (k);
5320 return (!(uentry_isUndefined (ce)) && !(uentry_isPriv (ce)) && (uentry_isVar (ce)));
5328 refTable_free (/*@only@*/ /*@null@*/ refTable x, int nentries)
5334 for (i = 0; i < nentries; i++)
5344 usymtab_freeLevel (/*@notnull@*/ /*@only@*/ usymtab u)
5345 /*@globals globtab, utab, filetab@*/
5349 DPRINTF (("Free level [%p]", u));
5350 aliasTable_free (u->aliases);
5352 refTable_free (u->reftable, u->nentries);
5354 if (u == filetab || u == globtab)
5356 for (i = 0; i < u->nentries; i++)
5358 DPRINTF (("Free complete: %d", i));
5359 DPRINTF (("Uentry: %s", uentry_unparse (u->entries[i])));
5360 uentry_freeComplete (u->entries[i]);
5361 u->entries[i] = uentry_undefined;
5366 for (i = 0; i < u->nentries; i++)
5368 uentry_free (u->entries[i]);
5369 u->entries[i] = uentry_undefined;
5373 guardSet_free (u->guards);
5380 llassert (!cstringTable_isDefined (u->htable));
5383 sfree (u); /* evans 2002-07-12: was inside if */
5387 usymtab_freeAux (/*@only@*/ usymtab u)
5388 /*@globals globtab, utab, filetab@*/
5391 while (u != GLOBAL_ENV)
5394 usymtab_freeLevel (u);
5401 void usymtab_free ()
5402 /*@globals killed utab, globtab, filetab@*/
5406 usymtab_freeAux (utab);
5407 utab = usymtab_undefined;
5409 } /*@=globstate@*/ /* Splint cannot tell that utab is killed */
5411 static int usymtab_lexicalLevel (void) /*@globals utab@*/
5413 return (utab->lexlevel);
5416 bool usymtab_inGlobalScope () /*@globals utab, globtab@*/
5418 return (utab == globtab);
5421 bool usymtab_inFileScope () /*@globals utab@*/
5423 return (utab->lexlevel == fileScope);
5426 bool usymtab_inFunctionScope () /*@globals utab@*/
5428 return (utab->lexlevel == functionScope);
5432 usymtab_replaceEntry (uentry s)
5433 /*@globals utab, globtab@*/
5434 /*@modifies utab, s@*/
5436 usymtab_replaceEntryAux (utab, s);
5440 usymtab_matchForwardStruct (typeId u1, typeId u2)
5441 /*@globals globtab@*/
5443 uentry ue1 = usymtab_getTypeEntry (u1);
5444 uentry ue2 = usymtab_getTypeEntry (u2);
5446 if (uentry_isAnyTag (ue2))
5448 ctype reptype = uentry_getType (ue1);
5450 if (ctype_isPointer (reptype))
5452 ctype repbase = ctype_getBaseType (reptype);
5454 if (ctype_isUA (repbase))
5456 typeId rtuid = ctype_typeId (repbase);
5458 if (u2 == rtuid) return TRUE;
5460 if (typeId_isValid (rtuid))
5462 reptype = uentry_getType (usymtab_getTypeEntry (rtuid));
5463 return (ctype_isUA (reptype) && (u2 == (ctype_typeId (reptype))));
5472 void usymtab_addGuards (guardSet guards)
5475 utab->guards = guardSet_union (utab->guards, guards);
5478 static bool usymtab_isGuardedAux (sRef s)
5482 sRef base = sRef_getRootBase (s);
5483 int lowlevel = paramsScope;
5484 int baselevel = sRef_lexLevel (base);
5486 if (sRef_isCvar (base))
5488 lowlevel = baselevel;
5489 if (lowlevel < paramsScope) lowlevel = paramsScope;
5492 while (tab->lexlevel >= lowlevel)
5494 DPRINTF (("Is guarded? [%s] %s",
5495 guardSet_unparse (tab->guards),
5496 sRef_unparseFull (s)));
5498 if (guardSet_isGuarded (tab->guards, s))
5501 if (!sRef_definitelyNull (s))
5503 sRef_setNotNull (s, fileloc_undefined);
5509 tab = usymtab_dropEnv (tab);
5515 void usymtab_unguard (sRef s) /*@modifies utab@*/
5518 sRef base = sRef_getRootBase (s);
5519 int lowlevel = paramsScope;
5520 int baselevel = sRef_lexLevel (base);
5522 if (sRef_isCvar (base))
5524 lowlevel = baselevel;
5525 if (lowlevel < paramsScope) lowlevel = paramsScope;
5528 while (tab->lexlevel >= lowlevel)
5530 if (guardSet_isGuarded (tab->guards, s))
5532 guardSet_delete (tab->guards, s);
5535 tab = usymtab_dropEnv (tab);
5539 bool usymtab_isGuarded (sRef s)
5541 DPRINTF (("Is guarded? %s", sRef_unparseFull (s)));
5542 return (sRef_aliasCompleteSimplePred (usymtab_isGuardedAux, s));
5545 bool usymtab_isDefinitelyNull (sRef s)
5547 return (sRef_aliasCheckSimplePred (usymtab_isDefinitelyNullAux, s));
5550 bool usymtab_isDefinitelyNullDeep (sRef s)
5552 return (sRef_deepPred (usymtab_isDefinitelyNull, s));
5555 static bool usymtab_isDefinitelyNullAux (sRef s)
5559 sRef base = sRef_getRootBase (s);
5560 int lowlevel = paramsScope;
5562 if (sRef_isCvar (base))
5564 lowlevel = sRef_lexLevel (base);
5565 if (lowlevel < paramsScope) lowlevel = paramsScope;
5568 while (tab->lexlevel >= lowlevel)
5570 if (guardSet_mustBeNull (tab->guards, s))
5575 while (tab->kind == US_CBRANCH)
5580 llassert (usymtab_isDefined (tab));
5582 if (tab->kind == US_FBRANCH)
5585 llassert (tab->kind == US_TBRANCH);
5595 usymtab_printGuards ()
5596 /*@globals utab, globtab@*/
5598 usymtab ttab = utab;
5600 while (ttab != globtab)
5602 llmsg (message ("Guards [%d]: %q", ttab->lexlevel,
5603 guardSet_unparse (ttab->guards)));
5609 usymtab_displayAllUses ()
5610 /*@globals utab, globtab@*/
5614 /* only in top scope */
5615 llassert (utab == globtab);
5617 /* need a copy, so order is not messed up by sort! */
5618 copy = usymtab_shallowCopy (globtab);
5620 qsort (copy->entries, (size_t)copy->nentries,
5621 sizeof (*copy->entries), (int (*)(const void *, const void *)) uentry_xcompareuses);
5623 usymtab_entries (copy, ue)
5625 if (uentry_isValid (ue) && !uentry_isGlobalMarker (ue))
5627 filelocList uses = uentry_getUses (ue);
5628 int size = filelocList_realSize (uses);
5630 if (fileloc_isDefined (uentry_whereDefined (ue))
5631 && !fileloc_isLib (uentry_whereDefined (ue))
5634 llmsg (message ("%q (%q), %d use%&:\n %q",
5635 uentry_getName (ue),
5636 fileloc_unparse (uentry_whereDefined (ue)),
5637 size, filelocList_unparseUses (uses)));
5640 } end_usymtab_entries;
5642 usymtab_shallowFree (copy);
5645 static /*@dependent@*/ /*@exposed@*/ usymtab
5646 usymtab_getFileTab ()
5647 /*@globals filetab@*/
5649 llassert (filetab != NULL);
5655 usymtab_unparseStack ()
5658 return (usymtab_unparseStackTab (utab));
5661 static /*@only@*/ cstring
5662 usymtab_unparseStackTab (usymtab t)
5664 bool firstOne = TRUE;
5665 cstring ret = cstring_makeLiteral ("[");
5667 while (t != GLOBAL_ENV)
5671 ret = message ("%q %q", ret, usymtab_typeName (t));
5676 ret = message ("%q, %q", ret, usymtab_typeName (t));
5681 ret = message ("%q ]", ret);
5685 static /*@only@*/ cstring
5686 usymtab_typeName (/*@notnull@*/ usymtab t)
5690 case US_GLOBAL: return cstring_makeLiteral ("global");
5691 case US_NORMAL: return cstring_makeLiteral ("normal");
5692 case US_TBRANCH: return cstring_makeLiteral ("true");
5693 case US_FBRANCH: return cstring_makeLiteral ("false");
5694 case US_CBRANCH: return cstring_makeLiteral ("case");
5695 case US_SWITCH: return cstring_makeLiteral ("switch");
5701 void usymtab_addMustAlias (/*@exposed@*/ sRef s, /*@exposed@*/ sRef al)
5704 if (!sRef_similar (s, al))
5706 usymtab_addForceMustAlias (s, al);
5711 ** Same as usymtab_addMustAlias, except does not check sRef_isSimilar.
5714 void usymtab_addForceMustAlias (/*@exposed@*/ sRef s, /*@exposed@*/ sRef al)
5717 /* evans 2002-03-3: was sRef_isMeaningful -- but we need to keep aliases for new storage also! */
5718 if (sRef_isMeaningful (s)
5719 && sRef_isMeaningful (al)
5720 && !(sRef_isConst (s) || sRef_isConst (al))
5721 && !(sRef_isAddress (al) && sRef_isDirectParam (sRef_getBase (al))))
5723 utab->aliases = aliasTable_addMustAlias (utab->aliases, s, al);
5724 DPRINTF (("Must alias: %s", aliasTable_unparse (utab->aliases)));
5727 ** for local variable, aliasing is symmetric
5730 if (sRef_isLocalVar (s) && sRef_isLocalVar (al))
5732 utab->aliases = aliasTable_addMustAlias (utab->aliases, al, s);
5737 DPRINTF (("Not aliasing! %s / %s", sRef_unparseFull (s), sRef_unparseFull (al)));
5738 DPRINTF (("meaningful: %d %d", sRef_isMeaningful (s), sRef_isMeaningful (al)));
5742 void usymtab_addReallyForceMustAlias (/*@exposed@*/ sRef s, /*@exposed@*/ sRef al)
5745 utab->aliases = aliasTable_addMustAlias (utab->aliases, s, al);
5748 void usymtab_clearAlias (sRef s)
5749 /*@modifies utab, s@*/
5752 aliasTable_clearAliases (utab->aliases, s);
5755 sRefSet usymtab_allAliases (sRef s)
5758 if (sRef_isSomewhatMeaningful (s))
5762 ret = sRefSet_unionFree (aliasTable_aliasedBy (utab->aliases, s),
5763 aliasTable_canAlias (utab->aliases, s));
5768 DPRINTF (("NOT A MEANINGFUL SREF!"));
5769 return sRefSet_undefined;
5773 /*@only@*/ sRefSet usymtab_canAlias (sRef s)
5776 if (sRef_isSomewhatMeaningful (s))
5778 sRefSet res = aliasTable_canAlias (utab->aliases, s);
5782 return sRefSet_undefined;
5785 /*@only@*/ sRefSet usymtab_aliasedBy (sRef s)
5788 return (aliasTable_aliasedBy (utab->aliases, s));
5791 /*@only@*/ cstring usymtab_unparseAliases ()
5794 return (aliasTable_unparse (utab->aliases));
5798 ** Debugging routines:
5799 ** okay to leak storage here, only for debugging
5805 usymtab_printOut (void)
5811 char *ind = mstring_copy (" ");
5813 fprintf (g_warningstream, "<<< [symbol table] >>>\n");
5815 while (s != GLOBAL_ENV && s->env != GLOBAL_ENV)
5817 cstring tname = usymtab_typeName (s);
5821 ind[depth * 3 + 1] = '\0';
5824 fprintf (g_warningstream, "level: %d (%s)\n", s->lexlevel,
5825 cstring_toCharsSafe (tname));
5827 cstring_free (tname);
5829 for (i = 0; i < s->nentries; i++)
5831 cstring us = uentry_unparseFull (s->entries[i]);
5832 fprintf (g_warningstream, "%s\n", cstring_toCharsSafe (us));
5836 if (s->reftable != NULL && s->nentries > 0)
5838 fprintf (g_warningstream, "\t<< Ref table >>\n");
5840 for (i = 0; i < s->nentries; i++)
5842 fprintf (g_warningstream, "\t%s %3d: %d, %d\n", ind, i,
5843 s->reftable[i]->level,
5844 s->reftable[i]->index);
5848 ind[depth * 3 + 1] = ' ';
5852 fprintf (g_warningstream, "<<< end usymtab >>>\n");
5858 usymtab_printTypes ()
5859 /*@globals globtab@*/
5861 usymtab_printAllAux (globtab);
5865 usymtab_printAll (void)
5868 usymtab_printAllAux (utab);
5872 usymtab_printAllAux (usymtab s)
5873 /*@modifies g_warningstream@*/
5877 char *ind = mstring_copy (" ");
5879 printf ("[[[ usymtab ]]]");
5881 while (s != GLOBAL_ENV)
5884 ind[depth * 3 + 1] = '\0';
5886 if (s->env == GLOBAL_ENV)
5890 printf ("level: %d / break: %s / exit: %s\n", s->lexlevel,
5891 cstring_toCharsSafe (bool_unparse (s->mustBreak)),
5892 cstring_toCharsSafe (exitkind_unparse (s->exitCode)));
5896 for (i = looplow; i < s->nentries; i++)
5898 printf ("%s%3d. %s\n", ind, i,
5899 cstring_toCharsSafe (uentry_unparseFull (s->entries[i])));
5904 printf ("level: %d / break: %s / exit: %s\n", s->lexlevel,
5905 cstring_toCharsSafe (bool_unparse (s->mustBreak)),
5906 cstring_toCharsSafe (exitkind_unparse (s->exitCode)));
5908 for (i = 0; i < s->nentries; i++)
5910 printf ("%s%3d %s\n", ind, i,
5911 cstring_toCharsSafe (uentry_unparseFull (s->entries[i])));
5915 ind[depth * 3 + 1] = ' ';
5919 printf ("----------\n");
5923 usymtab_printComplete ()
5928 char *ind = mstring_copy (" ");
5931 while (s != GLOBAL_ENV)
5935 ind[depth * 3 + 1] = '\0';
5938 if (s->env == GLOBAL_ENV)
5942 printf ("level: %d\n", s->lexlevel);
5946 for (i = looplow; i < s->nentries; i++)
5948 printf ("%s%3d %s\n", ind, i,
5949 cstring_toCharsSafe (uentry_unparseFull (s->entries[i])));
5954 printf ("level: %d\n", s->lexlevel);
5955 for (i = 0; i < s->nentries; i++)
5957 printf ("%s%3d %s\n", ind, i,
5958 cstring_toCharsSafe (uentry_unparseFull (s->entries[i])));
5962 ind[depth * 3 + 1] = ' ';
5967 printf ("----------\n");
5972 static /*@only@*/ cstring /*@unused@*/
5973 usymtab_unparseLocalAux (/*@notnull@*/ usymtab s)
5975 cstring c = message ("lexlevel: %d\n", s->lexlevel);
5978 for (i = 0; i < s->nentries; i++)
5980 c = message ("%q\n%q", c, uentry_unparseFull (s->entries[i]));
5983 c = message ("%q\n=========", c);
5987 static cstring /*@unused@*/ /*@only@*/
5988 usymtab_unparseLocalList (/*@notnull@*/ usymtab s)
5990 cstring c = message ("[%d/%s/%s] ", s->lexlevel,
5991 bool_unparse (s->mustBreak),
5992 exitkind_unparse (s->exitCode));
5995 for (i = 0; i < s->nentries; i++)
5997 sRef sr = uentry_getSref (s->entries[i]);
6001 c = message ("%q: %q [%b]", c, uentry_getName (s->entries[i]),
6002 sRef_isStateDefined (sr));
6006 c = message ("%q, %q [%b]", c, uentry_getName (s->entries[i]),
6007 sRef_isStateDefined (sr));
6017 usymtab_printLocal (void)
6023 printf ("lexlevel: %d\n", s->lexlevel);
6025 for (i = 0; i < s->nentries; i++)
6027 printf ("%s\n", cstring_toCharsSafe (uentry_unparseFull (s->entries[i])));
6030 while (s->lexlevel > 1)
6035 llassert (usymtab_isDefined (s));
6037 printf ("Params:\n");
6039 for (i = 0; i < s->nentries; i++)
6041 printf ("%d: %s\n", i,
6042 cstring_toCharsSafe (uentry_unparseFull (s->entries[i])));
6047 static bool checkDistinctExternalName (uentry e)
6048 /*@globals globtab@*/
6049 /*@modifies *g_warningstream@*/
6051 size_t checklen = size_fromInt (context_getValue (FLG_EXTERNALNAMELEN));
6052 bool ignorecase = context_getFlag (FLG_EXTERNALNAMECASEINSENSITIVE);
6053 bool gotone = FALSE;
6054 bool extras = FALSE;
6055 bool hasError = FALSE;
6056 cstring name = uentry_rawName (e);
6057 usymtab st = globtab;
6065 if (uentry_isAnyTag (e))
6067 checklen++; /* the tag marker doesn't count */
6071 usymtab_entries (st, oe)
6073 if (uentry_sameObject (oe, e))
6080 if (cstring_equalCaseInsensitive (uentry_rawName (oe), name))
6089 (FLG_DISTINCTEXTERNALNAMES,
6091 ("External identifier %q is not distinguishable from %q "
6092 "because alphabetical case is ignored",
6094 uentry_getName (oe)),
6095 uentry_whereLast (e)))
6097 uentry_showWhereAny (oe);
6098 uentry_setHasNameError (oe);
6107 if (cstring_equalLenCaseInsensitive (uentry_rawName (oe),
6116 if (cstring_equalLen (uentry_rawName (oe), name, checklen))
6119 (FLG_DISTINCTEXTERNALNAMES,
6122 ("External identifier %q is not distinguishable from %q "
6123 "in the first %d characters (%q)",
6125 uentry_getName (oe),
6126 size_toInt (checklen),
6127 cstring_clip (uentry_getName (e), checklen)),
6129 uentry_whereLast (e)))
6131 uentry_showWhereAny (oe);
6132 uentry_setHasNameError (oe);
6145 (FLG_DISTINCTEXTERNALNAMES,
6147 ("External identifier %q is not distinguishable from %q "
6148 "in the first %d characters because alphabetical case "
6151 uentry_getName (oe),
6152 size_toInt (checklen)),
6153 uentry_whereLast (e)))
6155 uentry_showWhereAny (oe);
6156 uentry_setHasNameError (oe);
6162 else if (cstring_equalLen (uentry_rawName (oe), name, checklen))
6171 (FLG_DISTINCTEXTERNALNAMES,
6174 ("External identifier %q is not distinguishable from %q "
6175 "in the first %d characters (%q)",
6177 uentry_getName (oe),
6178 size_toInt (checklen),
6179 cstring_clip (uentry_getName (e), checklen)),
6181 uentry_whereLast (e)))
6183 uentry_showWhereAny (oe);
6184 uentry_setHasNameError (oe);
6193 } end_usymtab_entries ;
6200 (cstring_makeLiteral ("One or more additional "
6201 "indistinguishable external "
6202 "names not reported"));
6208 static bool checkDistinctInternalName (uentry e)
6210 /*@modifies *g_warningstream@*/
6212 usymtab ttab = utab;
6213 cstring name = uentry_rawName (e);
6214 size_t numchars = size_fromInt (context_getValue (FLG_INTERNALNAMELEN));
6215 bool caseinsensitive = context_getFlag (FLG_INTERNALNAMECASEINSENSITIVE);
6216 bool lookalike = context_getFlag (FLG_INTERNALNAMELOOKALIKE);
6218 if (uentry_isAnyTag (e) && (numchars != 0))
6220 numchars++; /* the tag marker doesn't count */
6223 while (usymtab_isDefined (ttab))
6225 usymtab_entries (ttab, oe)
6227 if (uentry_sameObject (oe, e))
6229 /*@innercontinue@*/ continue;
6232 switch (cstring_genericEqual
6233 (name, uentry_rawName (oe),
6234 numchars, caseinsensitive, lookalike))
6236 case CGE_DISTINCT: /* okay */
6240 if (cstring_equal (name, uentry_rawName (oe)))
6242 ; /* got a shadow error */
6247 (FLG_DISTINCTINTERNALNAMES,
6250 ("Internal identifier %q is not distinguishable from %q "
6251 "in the first %d characters (%q)",
6253 uentry_getName (oe),
6254 size_toInt (numchars),
6255 cstring_clip (uentry_getName (e), numchars)),
6257 uentry_whereLast (e)))
6259 uentry_showWhereAny (oe);
6260 uentry_setHasNameError (oe);
6267 if (numchars == 0 || (cstring_length (name) <= numchars))
6270 (FLG_DISTINCTINTERNALNAMES,
6272 ("Internal identifier %q is not distinguishable from %q "
6273 "without case sensitivity",
6275 uentry_getName (oe)),
6276 uentry_whereLast (e)))
6278 uentry_showWhereAny (oe);
6279 uentry_setHasNameError (oe);
6286 (FLG_DISTINCTINTERNALNAMES,
6288 ("Internal identifier %q is not distinguishable from %q "
6289 "in the first %d characters without case sensitivity",
6291 uentry_getName (oe),
6292 size_toInt (numchars)),
6293 uentry_whereLast (e)))
6295 uentry_showWhereAny (oe);
6296 uentry_setHasNameError (oe);
6304 || (cstring_length (name) <= numchars))
6307 (FLG_DISTINCTINTERNALNAMES,
6309 ("Internal identifier %q is not distinguishable from %q "
6310 "except by lookalike characters",
6312 uentry_getName (oe)),
6313 uentry_whereLast (e)))
6315 uentry_showWhereAny (oe);
6316 uentry_setHasNameError (oe);
6323 (FLG_DISTINCTINTERNALNAMES,
6325 ("Internal identifier %q is not distinguishable from %q "
6326 "in the first %d characters except by lookalike characters",
6328 uentry_getName (oe),
6329 size_toInt (numchars)),
6330 uentry_whereLast (e)))
6332 uentry_showWhereAny (oe);
6333 uentry_setHasNameError (oe);
6338 } end_usymtab_entries ;
6346 void usymtab_checkDistinctName (uentry e, int scope)
6347 /*@globals utab, globtab@*/
6349 bool hasError = FALSE;
6350 fileloc where = uentry_whereLast (e);
6352 if (!fileloc_isPreproc (where) && !fileloc_isBuiltin (where))
6354 if (scope == globScope)
6356 if (context_getFlag (FLG_DISTINCTEXTERNALNAMES))
6358 hasError = checkDistinctExternalName (e);
6362 if (!hasError && context_getFlag (FLG_DISTINCTINTERNALNAMES))
6364 hasError = checkDistinctInternalName (e);
6370 uentry_setHasNameError (e);
6374 /*@exposed@*/ sRef usymtab_lookupGlobalMarker (void) /*@globals utab@*/
6378 ue = usymtab_lookupAux (utab, GLOBAL_MARKER_NAME);
6379 llassert (uentry_isValid (ue));
6381 return uentry_getSref (ue);
6387 ** For debugging only
6391 usymtab_checkAllValid () /*@globals utab@*/
6395 while (tab != GLOBAL_ENV)
6399 for (i = 0; i < utab->nentries; i++)
6401 uentry e = utab->entries[i];
6403 uentry_checkValid (e);
6406 aliasTable_checkValid (tab->aliases);