]>
Commit | Line | Data |
---|---|---|
616915dd | 1 | /* |
2 | ** LCLint - annotation-assisted static program checker | |
3 | ** Copyright (C) 1994-2000 University of Virginia, | |
4 | ** Massachusetts Institute of Technology | |
5 | ** | |
6 | ** This program is free software; you can redistribute it and/or modify it | |
7 | ** under the terms of the GNU General Public License as published by the | |
8 | ** Free Software Foundation; either version 2 of the License, or (at your | |
9 | ** option) any later version. | |
10 | ** | |
11 | ** This program is distributed in the hope that it will be useful, but | |
12 | ** WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | ** General Public License for more details. | |
15 | ** | |
16 | ** The GNU General Public License is available from http://www.gnu.org/ or | |
17 | ** the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, | |
18 | ** MA 02111-1307, USA. | |
19 | ** | |
20 | ** For information on lclint: lclint-request@cs.virginia.edu | |
21 | ** To report a bug: lclint-bug@cs.virginia.edu | |
22 | ** For more information: http://lclint.cs.virginia.edu | |
23 | */ | |
24 | /* | |
25 | ** usymtab | |
26 | ** | |
27 | ** Lexically scoped symbol table. | |
28 | ** | |
29 | ** Unlike a normal symbol table, this table splits to reflect branches. | |
30 | ** | |
31 | ** This is necessary since symbol table entries also reflect | |
32 | ** some state information, like initialization, that may be | |
33 | ** different on different branches. | |
34 | ** | |
35 | ** For each control structure we split: | |
36 | ** | |
37 | ** { } - a normal scope (no control) US_NORMAL | |
38 | ** | |
39 | ** if <pred> { } - US_TBRANCH true branch | |
40 | ** while <pred> { } US_FBRANCH else branch | |
41 | ** | |
42 | ** switch <pred> { } - US_SWITCH | |
43 | ** | |
44 | ** case x: - case scope US_CBRANCH | |
45 | ** Should be kept in a separate table, because of | |
46 | ** weird C syntax. | |
47 | */ | |
48 | ||
49 | # include "lclintMacros.nf" | |
50 | # include "basic.h" | |
51 | # include "structNames.h" | |
52 | # include "exprChecks.h" | |
53 | # include "aliasChecks.h" | |
54 | ||
55 | /* | |
56 | ** Keep track of type definitions inside a function. | |
57 | */ | |
58 | ||
59 | static uentryList functypes = uentryList_undefined; | |
60 | ||
61 | static bool dbgfree = FALSE; | |
62 | static bool dbgload = TRUE; | |
63 | ||
64 | /*@access ekind usymId@*/ | |
65 | ||
66 | /* | |
67 | ** Hack to prevent shadow errors from appearing when function parameters | |
68 | ** are entered into a new scope. | |
69 | */ | |
70 | ||
71 | static bool noshadowerror = FALSE; | |
72 | ||
73 | /* | |
74 | ** Constraint: static variables can live in 1 or > 2. | |
75 | ** | |
76 | ** except for tags. All tags must be at the global level. | |
77 | ** Static tags are handled in a kludgey way. | |
78 | */ | |
79 | ||
80 | /* | |
81 | ** utab is the universal symbol table | |
82 | ** globtab is the global environment of utab | |
83 | ** oldtab is needed for conversions in dumping (after sorting the table) | |
84 | ** | |
85 | ** there can be only one usymtab! | |
86 | */ | |
87 | ||
88 | static /*@checkedstrict@*/ /*@owned@*/ /*@notnull@*/ usymtab utab; | |
89 | ||
90 | /* Reachable environments from from utab */ | |
91 | static /*@checkedstrict@*/ /*@notnull@*/ /*@dependent@*/ usymtab globtab; | |
92 | static /*@checkedstrict@*/ /*@dependent@*/ usymtab filetab; | |
93 | ||
94 | /* Used for sorting for dumpage. */ | |
95 | static /*@checkedstrict@*/ /*@owned@*/ usymtab oldtab; | |
96 | ||
97 | static int usymtab_lexicalLevel (void) /*@globals utab@*/ ; | |
98 | static bool usymtab_isProbableNullAltBranch (sRef p_s) /*@globals utab@*/ ; | |
99 | static void refTable_free (/*@only@*/ /*@null@*/ refTable p_x, int p_nentries); | |
100 | static ctype usymtab_suFieldsType (uentryList p_f, bool p_isStruct) /*@globals globtab@*/ ; | |
101 | ||
102 | static void | |
103 | usymtab_freeLevel (/*@notnull@*/ /*@only@*/ usymtab p_u) | |
104 | /*@globals globtab, utab, filetab@*/ /*@modifies p_u@*/ ; | |
105 | ||
106 | static bool usymtab_isProbableNullAux (sRef p_s) /*@globals utab@*/ ; | |
107 | static /*@only@*/ cstring usymtab_unparseStackTab (usymtab p_t); | |
108 | static /*@exposed@*/ /*@dependent@*/ uentry | |
109 | usymtab_getRefTab (/*@notnull@*/ usymtab p_u, int p_level, usymId p_index); | |
110 | static /*@unused@*/ /*@only@*/ cstring | |
111 | usymtab_unparseLocalAux (/*@notnull@*/ usymtab p_s); | |
112 | static /*@unused@*/ /*@only@*/ cstring | |
113 | usymtab_unparseLocalList (/*@notnull@*/ usymtab p_s); | |
114 | static /*@only@*/ cstring usymtab_typeName (/*@notnull@*/ usymtab p_t); | |
115 | static void usymtab_handleParams (void) | |
116 | /*@globals utab, globtab, filetab@*/ | |
117 | /*@modifies utab@*/ ; | |
118 | ||
119 | static /*@exposed@*/ /*@dependent@*/ uentry | |
120 | usymtab_addRefEntry (/*@notnull@*/ usymtab p_s, cstring p_k); | |
121 | static /*@exposed@*/ /*@dependent@*/ usymtab | |
122 | usymtab_dropEnv (/*@notnull@*/ usymtab p_s); | |
123 | static /*@exposed@*/ /*@dependent@*/ uentry | |
124 | usymtab_getRefNoisy (/*@notnull@*/ usymtab p_s, int p_level, usymId p_index); | |
125 | ||
126 | static /*@exposed@*/ /*@dependent@*/ uentry | |
127 | usymtab_lookupQuiet (usymtab p_s, cstring p_k); | |
128 | static void usymtab_printAllAux (usymtab p_s) /*@modifies g_msgstream@*/ ; | |
129 | static int usymtab_getIndex (/*@notnull@*/ usymtab p_s, cstring p_k); | |
130 | static /*@exposed@*/ uentry usymtab_fetchIndex (/*@notnull@*/ usymtab p_s, int p_i); | |
131 | static /*@exposed@*/ uentry | |
132 | usymtab_lookupAux (usymtab p_s, cstring p_k); | |
133 | static /*@exposed@*/ /*@dependent@*/ /*@notnull@*/ usymtab | |
134 | usymtab_getFileTab (void) /*@globals filetab@*/ ; | |
135 | static int refTable_lookup (/*@notnull@*/ usymtab p_ut, int p_level, int p_index); | |
136 | static bool usymtab_mustBreak (usymtab p_s); | |
137 | static bool usymtab_mustEscape (usymtab p_s); | |
138 | ||
139 | static void recordFunctionType (uentry ue) | |
140 | { | |
141 | llassert (uentry_isDatatype (ue) || uentry_isAnyTag (ue) | |
142 | || uentry_isEnumConstant (ue)); | |
143 | ||
144 | /*@-temptrans@*/ | |
145 | functypes = uentryList_add (functypes, ue); | |
146 | /*@=temptrans@*/ | |
147 | } | |
148 | ||
149 | static void clearFunctionTypes (void) | |
150 | /*@modifies globtab@*/ | |
151 | { | |
152 | uentryList_elements (functypes, el) | |
153 | { | |
154 | if (cstring_isDefined (uentry_rawName (el))) | |
155 | { | |
156 | if (globtab->htable != NULL) | |
157 | { | |
158 | hashTable_remove (globtab->htable, uentry_rawName (el)); | |
159 | } | |
160 | ||
161 | uentry_setName (el, cstring_undefined); | |
162 | } | |
163 | ||
164 | /*@access uentry@*/ | |
165 | llassert (uentry_isValid (el)); | |
166 | el->sref = sRef_undefined; | |
167 | /*@noaccess uentry@*/ | |
168 | } end_uentryList_elements ; | |
169 | ||
170 | uentryList_clear (functypes); | |
171 | } | |
172 | ||
173 | static /*@falsenull@*/ bool usymtab_isBranch (usymtab u) | |
174 | { | |
175 | return (usymtab_isDefined (u) && | |
176 | (u->kind == US_TBRANCH || u->kind == US_FBRANCH | |
177 | || u->kind == US_CBRANCH || u->kind == US_SWITCH)); | |
178 | } | |
179 | ||
180 | static bool usymtab_mustBreak (usymtab s) | |
181 | { | |
182 | llassert (s != GLOBAL_ENV); | |
183 | return (s->mustBreak); | |
184 | } | |
185 | ||
186 | static bool usymtab_mustEscape (usymtab s) | |
187 | { | |
188 | llassert (s != GLOBAL_ENV); | |
189 | return (exitkind_mustEscape (s->exitCode)); | |
190 | } | |
191 | ||
192 | void usymtab_setMustBreak () | |
193 | /*@modifies utab@*/ | |
194 | { | |
195 | llassert (utab != GLOBAL_ENV); | |
196 | utab->mustBreak = TRUE; | |
197 | } | |
198 | ||
199 | void usymtab_setExitCode (exitkind ex) | |
200 | /*@modifies utab@*/ | |
201 | { | |
202 | llassert (utab != GLOBAL_ENV); | |
203 | ||
204 | utab->exitCode = ex; | |
205 | ||
206 | if (exitkind_mustEscape (ex)) | |
207 | { | |
208 | utab->mustBreak = TRUE; | |
209 | } | |
210 | } | |
211 | ||
212 | bool usymtab_isAltProbablyDeepNull (sRef s) | |
213 | { | |
214 | return (sRef_deepPred (usymtab_isProbableNullAltBranch, s)); | |
215 | } | |
216 | ||
217 | static bool usymtab_isProbableNullAltBranch (sRef s) | |
218 | /*@globals utab@*/ | |
219 | { | |
220 | guardSet t; | |
221 | bool res; | |
222 | ||
223 | t = utab->guards; | |
224 | ||
225 | llassert (utab->env != NULL); | |
226 | ||
227 | /*@-mods@*/ /* These modifications are cancelled. */ | |
228 | utab->guards = utab->env->guards; | |
229 | utab->env->guards = t; | |
230 | /*@=mods@*/ | |
231 | ||
232 | llassert (usymtab_isDefined (utab)); | |
233 | res = usymtab_isProbableNull (s); | |
234 | ||
235 | /* | |
236 | ** This reports a spurious error. It is okay, because of | |
237 | ** the nesting relationship of usymtab environments. | |
238 | */ | |
239 | ||
240 | /*@-mods@*/ /* Cancelling modifications. */ | |
241 | /*@i1@*/ utab->env->guards = utab->guards; | |
242 | /*@i1@*/ utab->guards = t; | |
243 | /*@=mods@*/ | |
244 | ||
245 | return res; | |
246 | } | |
247 | ||
248 | static /*@notnull@*/ /*@special@*/ usymtab | |
249 | usymtab_create (uskind kind, /*@keep@*/ usymtab env, bool nextlevel) | |
250 | /*@defines result@*/ | |
251 | /*@post:isnull result->htable, result->guards, result->aliases@*/ | |
252 | { | |
253 | usymtab t = (usymtab) dmalloc (sizeof (*t)); | |
254 | ||
255 | t->nentries = 0; | |
256 | t->nspace = CBASESIZE; | |
257 | t->entries = (uentry *) dmalloc (sizeof (*t->entries) * CBASESIZE); | |
258 | t->reftable = (nextlevel | |
259 | ? NULL | |
260 | : (refentry *) dmalloc (sizeof (*t->reftable) * CBASESIZE)); | |
261 | ||
262 | t->kind = kind; | |
263 | t->lexlevel = (env == GLOBAL_ENV ? 0 : env->lexlevel) + (nextlevel ? 1 : 0); | |
264 | ||
265 | t->env = env; | |
266 | t->htable = NULL; | |
267 | ||
268 | t->guards = guardSet_undefined; | |
269 | t->aliases = aliasTable_undefined; | |
270 | ||
271 | t->mustBreak = FALSE; | |
272 | t->exitCode = XK_NEVERESCAPE; | |
273 | ||
274 | return t; | |
275 | } | |
276 | ||
277 | /* | |
278 | ** constructors | |
279 | */ | |
280 | ||
281 | static /*@only@*/ /*@notnull@*/ usymtab | |
282 | usymtab_createRoot (void) /*@modifies nothing@*/ | |
283 | { | |
284 | usymtab u = (usymtab) dmalloc (sizeof (*u)); | |
285 | ||
286 | u->nentries = 0; | |
287 | u->nspace = CGLOBBASESIZE; | |
288 | u->entries = (uentry *) dmalloc (sizeof (*u->entries) * CGLOBBASESIZE); | |
289 | u->env = GLOBAL_ENV; | |
290 | u->lexlevel = 0; | |
291 | u->htable = hashTable_create (CGLOBHASHSIZE); | |
292 | u->reftable = NULL; | |
293 | ||
294 | u->guards = guardSet_new (); | |
295 | u->aliases = aliasTable_new (); | |
296 | ||
297 | u->mustBreak = FALSE; | |
298 | u->exitCode = XK_NEVERESCAPE; | |
299 | u->kind = US_NORMAL; | |
300 | ||
301 | /*@i23@*/ return (u); | |
302 | } | |
303 | ||
304 | void | |
305 | usymtab_initMod (void) | |
306 | /*@globals undef utab, undef oldtab, undef globtab, undef filetab @*/ | |
307 | /*@modifies utab, globtab, filetab, oldtab @*/ | |
308 | { | |
309 | utab = usymtab_createRoot (); | |
310 | globtab = utab; | |
311 | filetab = usymtab_undefined; | |
312 | oldtab = usymtab_undefined; | |
313 | } | |
314 | ||
315 | /* | |
316 | ** utab should be empty? (requires?) | |
317 | ** | |
318 | ** Adds bool types to symbol table (these are built in for now) | |
319 | ** Only do this is there is no library! | |
320 | */ | |
321 | ||
322 | void | |
323 | usymtab_initBool () | |
324 | { | |
325 | if (context_getFlag (FLG_NOLIB)) | |
326 | { | |
327 | ctype boolt = ctype_bool; | |
328 | /* evs 2000-07-24: bool is now treated as abstract (always) */ | |
329 | ||
330 | uentry boolentry = uentry_makeBoolDatatype (YES); | |
331 | usymtab_supGlobalEntry (boolentry); | |
332 | context_addBoolAccess (); | |
333 | ||
334 | /* | |
335 | ** We supply values 0 and 1 for the constants, so things like | |
336 | ** while (TRUE) can be interpreted correctly. | |
337 | */ | |
338 | ||
339 | usymtab_supGlobalEntry | |
340 | (uentry_makeConstantAux (context_getFalseName (), boolt, | |
341 | fileloc_getBuiltin (), FALSE, | |
342 | multiVal_makeInt (0))); | |
343 | usymtab_supGlobalEntry | |
344 | (uentry_makeConstantAux (context_getTrueName (), boolt, | |
345 | fileloc_getBuiltin (), FALSE, | |
346 | multiVal_makeInt (1))); | |
347 | } | |
348 | } | |
349 | ||
350 | /* | |
351 | ** mutators | |
352 | */ | |
353 | ||
354 | static void | |
355 | usymtab_grow (/*@notnull@*/ usymtab s) | |
356 | { | |
357 | int i; | |
358 | o_uentry *oldsyms = s->entries; | |
359 | ||
360 | s->nspace = CBASESIZE; | |
361 | s->entries = (uentry *) dmalloc (sizeof (*s->entries) | |
362 | * (s->nentries + s->nspace)); | |
363 | ||
364 | for (i = 0; i < s->nentries; i++) | |
365 | { | |
366 | s->entries[i] = oldsyms[i]; | |
367 | } | |
368 | ||
369 | sfree (oldsyms); | |
370 | ||
371 | if (s->reftable != NULL) | |
372 | { | |
373 | refTable oldRefs = s->reftable; | |
374 | ||
375 | s->reftable = (refentry *) dmalloc (sizeof (*s->reftable) | |
376 | * (s->nentries + CBASESIZE + 1)); | |
377 | ||
378 | for (i = 0; i < s->nentries; i++) | |
379 | { | |
380 | s->reftable[i] = oldRefs[i]; | |
381 | } | |
382 | ||
383 | /*@-compdestroy@*/ | |
384 | sfree (oldRefs); | |
385 | /*@=compdestroy@*/ | |
386 | } | |
387 | ||
388 | } | |
389 | ||
390 | static void | |
391 | usymtab_addEntryQuiet (/*@notnull@*/ usymtab s, /*@keep@*/ uentry e) | |
392 | { | |
393 | if (!(s->lexlevel > fileScope || !sRef_modInFunction ())) | |
394 | { | |
395 | if (uentry_isDatatype (e) | |
396 | || uentry_isFunction (e) | |
397 | || uentry_isAnyTag (e) | |
398 | || uentry_isEnumConstant (e) | |
399 | || context_inMacro ()) | |
400 | { | |
401 | /* | |
402 | ** Not a bug. Code like, | |
403 | ** int f (void) { typedef int tint; ... } | |
404 | ** is legal. | |
405 | */ | |
406 | ||
407 | /* was nothing here! */ | |
408 | /*@i@*/ e->sref = sRef_saveCopy (e->sref); | |
409 | } | |
410 | else | |
411 | { | |
412 | llparseerror | |
413 | (cstring_makeLiteral ("Declaration outside function scope")); | |
414 | ||
415 | llcontbug (message ("usymtab_addEntryQuiet: inconsistent state " | |
416 | "(lexlevel = %d, modFunction = %s) adding: %q", | |
417 | s->lexlevel, bool_unparse (sRef_modInFunction ()), | |
418 | uentry_unparse (e))); | |
419 | sRef_setGlobalScope (); | |
420 | /* make sure the sRef is not bashed! */ | |
421 | /*@i@*/ e->sref = sRef_saveCopy (e->sref); | |
422 | } | |
423 | } | |
424 | ||
425 | if (s->nspace <= 0) | |
426 | { | |
427 | usymtab_grow (s); | |
428 | } | |
429 | ||
430 | s->nspace--; | |
431 | s->entries[s->nentries] = e; | |
432 | ||
433 | # ifdef DOANNOTS | |
434 | if (s == globtab || s == filetab) | |
435 | { | |
436 | if (!fileloc_isLib (g_currentloc)) | |
437 | { | |
438 | uentry_tallyAnnots (e, AN_UNKNOWN); | |
439 | } | |
440 | } | |
441 | # endif | |
442 | ||
443 | if (s->htable != NULL) | |
444 | { | |
445 | hashTable_insert (s->htable, uentry_rawName (e), s->nentries); | |
446 | } | |
447 | ||
448 | s->nentries++; | |
449 | } | |
450 | ||
451 | static /*@observer@*/ uentry /*@alt void@*/ | |
452 | usymtab_addEntryBase (/*@notnull@*/ usymtab s, /*@only@*/ uentry e) | |
453 | { | |
454 | /* | |
455 | ** In theory, we shouldn't need this test because it this is | |
456 | ** only called when a library is being read, and it shouldn't | |
457 | ** ever have a duplicate entry. In practice, its safer to | |
458 | ** leave it in, though. | |
459 | */ | |
460 | ||
461 | uentry old; | |
462 | ||
463 | if (uentry_isValid (old = usymtab_lookupQuiet (s, uentry_rawName (e)))) | |
464 | { | |
465 | DPRINTF (("Duplicate entry: %s", uentry_unparse (e))); | |
466 | uentry_free (e); /* duplicate */ | |
467 | return old; | |
468 | } | |
469 | else | |
470 | { | |
471 | int thisentry = s->nentries; | |
472 | ||
473 | if (uentry_isVar (e)) | |
474 | { | |
475 | uentry_setSref (e, sRef_makeCvar (globScope, thisentry, | |
476 | uentry_getType (e))); | |
477 | } | |
478 | ||
479 | usymtab_addEntryQuiet (s, e); | |
480 | return e; | |
481 | } | |
482 | } | |
483 | ||
484 | static usymId | |
485 | usymtab_addEntryAux (/*@notnull@*/ usymtab st, /*@keep@*/ uentry e, bool isSref) | |
486 | /*@globals globtab@*/ | |
487 | /*@modifies st, e@*/ | |
488 | { | |
489 | usymId thisentry = st->nentries; | |
490 | ||
491 | llassert (!uentry_isElipsisMarker (e)); | |
492 | ||
493 | /* | |
494 | ** not true for tags | |
495 | ** llassert (usymtab_lookupSafe (uentry_rawName (e)) == uentry_undefined); | |
496 | **/ | |
497 | ||
498 | llassertprint (uentry_isAnyTag (e) ? st == globtab : TRUE, | |
499 | ("non-global tag: %s / %d", uentry_unparseFull (e), st->lexlevel)); | |
500 | ||
501 | if (st->lexlevel == fileScope | |
502 | && (!(uentry_isStatic (e)) || uentry_isAnyTag (e))) | |
503 | { | |
504 | st = globtab; | |
505 | } | |
506 | ||
507 | if (isSref) | |
508 | { | |
509 | ctype ct = uentry_getType (e); | |
510 | ||
511 | if (uentry_isFunction (e) && ctype_isFunction (ct)) | |
512 | { | |
513 | ct = ctype_returnValue (ct); | |
514 | } | |
515 | ||
516 | if (uentry_isStatic (e)) | |
517 | { | |
518 | sRef sr = sRef_makeCvar (st->lexlevel, thisentry, ct); | |
519 | ||
520 | if (sRef_isStack (sr) || sRef_isLocalState (sr)) | |
521 | { | |
522 | sRef_setAliasKind (sr, AK_STATIC, uentry_whereLast (e)); | |
523 | sRef_setDefined (sr, uentry_whereLast (e)); | |
524 | } | |
525 | ||
526 | uentry_setSref (e, sr); | |
527 | } | |
528 | else | |
529 | { | |
530 | uentry_setSref (e, sRef_makeCvar (st->lexlevel, thisentry, ct)); | |
531 | } | |
532 | ||
533 | } | |
534 | ||
535 | if (uentry_isDatatype (e)) | |
536 | { | |
537 | ||
538 | uentry_setDatatype (e, thisentry); | |
539 | } | |
540 | ||
541 | if (uentry_isFunction (e)) | |
542 | { | |
543 | ctype ct = uentry_getType (e); | |
544 | ||
545 | if (ctype_isFunction (ct) | |
546 | && uentryList_isMissingParams (ctype_argsFunction (ct))) | |
547 | { | |
548 | if (uentry_isDeclared (e)) | |
549 | { | |
550 | voptgenerror | |
551 | (FLG_NOPARAMS, | |
552 | message ("Function %q declared without parameter list", | |
553 | uentry_getName (e)), | |
554 | uentry_whereDeclared (e)); | |
555 | } | |
556 | else | |
557 | { | |
558 | voptgenerror | |
559 | (FLG_NOPARAMS, | |
560 | message ("Function %q specified without parameter list", | |
561 | uentry_getName (e)), | |
562 | uentry_whereSpecified (e)); | |
563 | } | |
564 | } | |
565 | } | |
566 | ||
567 | if (st == globtab && !uentry_isSpecified (e)) | |
568 | { | |
569 | exprChecks_checkExport (e); | |
570 | } | |
571 | ||
572 | ||
573 | uentry_checkName (e); | |
574 | ||
575 | usymtab_addEntryQuiet (st, e); | |
576 | return (thisentry); | |
577 | } | |
578 | ||
579 | usymId | |
580 | usymtab_addEntry (uentry e) | |
581 | /*@globals utab, globtab@*/ | |
582 | /*@modifies utab, e@*/ | |
583 | { | |
584 | ||
585 | llassertprint (!usymtab_exists (uentry_rawName (e)), | |
586 | ("Entry already exists: %s", uentry_unparse (e))); | |
587 | ||
588 | return usymtab_addEntryAux (utab, e, FALSE); | |
589 | } | |
590 | ||
591 | void | |
592 | usymtab_addGlobalEntry (uentry e) | |
593 | /*@modifies globtab, e@*/ | |
594 | { | |
595 | DPRINTF (("Add global: %s / %s", uentry_unparse (e), bool_unparse (uentry_isForward (e)))); | |
596 | ||
597 | (void) usymtab_addEntryAux (globtab, e, FALSE); | |
598 | } | |
599 | ||
600 | /* | |
601 | ** supercede and replace entry use elements of entries array, and | |
602 | ** assign an element to a new value, and then free the old value. | |
603 | ** Need -deparrays to avoid errors for this. | |
604 | */ | |
605 | ||
606 | /*@-deparrays@*/ | |
607 | ||
608 | static usymId | |
609 | usymtab_supEntryAux (/*@notnull@*/ usymtab st, | |
610 | /*@only@*/ uentry e, bool isSref) | |
611 | /*@globals globtab, filetab@*/ | |
612 | /*@modifies st, globtab, e@*/ | |
613 | { | |
614 | cstring ename = uentry_rawName (e); | |
615 | bool staticEntry = FALSE; | |
616 | int eindex; | |
617 | ||
618 | /* static tags in global scope */ | |
619 | if (st->lexlevel == fileScope | |
620 | && (!(uentry_isStatic (e)) || uentry_isAnyTag (e))) | |
621 | { | |
622 | eindex = usymtab_getIndex (st, ename); | |
623 | ||
624 | if (eindex != NOT_FOUND) | |
625 | { | |
626 | uentry ce = st->entries[eindex]; | |
627 | ||
628 | if (optgenerror | |
629 | (FLG_SHADOW, | |
630 | message ("%s %q shadows static declaration", | |
631 | ekind_capName (uentry_getKind (e)), | |
632 | uentry_getName (e)), | |
633 | uentry_whereDeclared (e))) | |
634 | { | |
635 | uentry_showWhereLast (ce); | |
636 | } | |
637 | ||
638 | if (eindex == st->nentries - 1) | |
639 | { | |
640 | ; | |
641 | } | |
642 | else | |
643 | { | |
644 | st->entries[eindex] = st->entries[st->nentries - 1]; | |
645 | } | |
646 | ||
647 | if (st->htable != NULL) | |
648 | { | |
649 | hashTable_replaceKey (st->htable, uentry_rawName (ce), | |
650 | uentry_rawName (e)); | |
651 | } | |
652 | ||
653 | uentry_free (ce); | |
654 | st->nentries--; | |
655 | } | |
656 | ||
657 | st = globtab; | |
658 | } | |
659 | ||
660 | if (uentry_isStatic (e)) { | |
661 | if (uentry_isFunction (e)) { | |
662 | /* Static function declarations are at the file level, even if they are in a deeped scope. */ | |
663 | st = usymtab_getFileTab (); | |
664 | staticEntry = TRUE; | |
665 | } else { | |
666 | if (!uentry_isAnyTag (e) && st == globtab) | |
667 | { | |
668 | st = usymtab_getFileTab (); | |
669 | staticEntry = TRUE; | |
670 | DPRINTF (("Static entry!")); | |
671 | } | |
672 | } | |
673 | } | |
674 | ||
675 | DPRINTF (("Using symtab: %s", usymtab_unparseLocalAux (st))); | |
676 | ||
677 | eindex = usymtab_getIndex (st, ename); | |
678 | ||
679 | if (eindex != NOT_FOUND) | |
680 | { | |
681 | uentry ce = st->entries[eindex]; | |
682 | ||
683 | DPRINTF (("Found entry: %s", uentry_unparse (ce))); | |
684 | ||
685 | if (uentry_isPriv (ce) | |
686 | /* || (fileloc_isImport (uentry_whereSpecified (ce))) */ | |
687 | || (uentry_isStatic (ce) | |
688 | && uentry_isAnyTag (ce) | |
689 | && (uentry_isDeclared (ce) | |
690 | && !fileloc_sameFile (uentry_whereDefined (ce), | |
691 | uentry_whereDefined (e))))) | |
692 | { | |
693 | /* | |
694 | ** overload entry | |
695 | ** if overloading import should do some checks! | |
696 | */ | |
697 | ||
698 | llassert ((st->lexlevel > fileScope || !sRef_modInFunction ())); | |
699 | ||
700 | st->entries[eindex] = e; | |
701 | ||
702 | if (uentry_isDatatype (e)) | |
703 | { | |
704 | uentry_setDatatype (e, eindex); | |
705 | } | |
706 | ||
707 | if (st == globtab && !uentry_isSpecified (e)) | |
708 | { | |
709 | exprChecks_checkExport (e); | |
710 | } | |
711 | ||
712 | if (st->htable != NULL) | |
713 | { | |
714 | hashTable_replaceKey (st->htable, uentry_rawName (ce), | |
715 | uentry_rawName (e)); | |
716 | } | |
717 | ||
718 | uentry_free (ce); | |
719 | ce = e; | |
720 | } | |
721 | else if (uentry_isSpecified (ce)) | |
722 | { | |
723 | if (uentry_isSpecified (e)) | |
724 | { | |
725 | if (fileloc_isImport (uentry_whereSpecified (ce))) | |
726 | { | |
727 | ||
728 | if (st->htable != NULL) | |
729 | { | |
730 | hashTable_replaceKey (st->htable, | |
731 | uentry_rawName (ce), | |
732 | uentry_rawName (e)); | |
733 | } | |
734 | ||
735 | uentry_free (ce); | |
736 | st->entries[eindex] = e; | |
737 | ce = e; | |
738 | ||
739 | if (uentry_isDatatype (e)) uentry_setDatatype (e, eindex); | |
740 | } | |
741 | else | |
742 | { | |
743 | if (fileloc_isImport (uentry_whereSpecified (e))) | |
744 | { | |
745 | uentry_free (e); | |
746 | } | |
747 | else | |
748 | { | |
749 | /* respecification errors already reported */ | |
750 | ||
751 | if (uentry_isDatatype (e)) | |
752 | { | |
753 | uentry_setDatatype (e, eindex); | |
754 | } | |
755 | ||
756 | if (st->htable != NULL) | |
757 | { | |
758 | hashTable_replaceKey (st->htable, | |
759 | uentry_rawName (ce), | |
760 | uentry_rawName (e)); | |
761 | } | |
762 | ||
763 | llassert ((st->lexlevel > fileScope || !sRef_modInFunction ())); | |
764 | uentry_free (ce); | |
765 | st->entries[eindex] = e; | |
766 | ce = e; | |
767 | } | |
768 | } | |
769 | } | |
770 | else /* e not specified */ | |
771 | { | |
772 | if (uentry_isDeclared (ce)) | |
773 | { | |
774 | llassert ((st->lexlevel > fileScope || !sRef_modInFunction ())); | |
775 | uentry_mergeDefinition (ce, e); | |
776 | } | |
777 | else | |
778 | { | |
779 | llassert ((st->lexlevel > fileScope || !sRef_modInFunction ())); | |
780 | uentry_mergeEntries (ce, e); | |
781 | } | |
782 | } | |
783 | } | |
784 | else /* ce not specified */ | |
785 | { | |
786 | if (!(st->lexlevel > fileScope || !sRef_modInFunction ())) | |
787 | { | |
788 | if (uentry_isDatatype (e) || uentry_isAnyTag (e) | |
789 | || uentry_isEnumConstant (e)) | |
790 | { | |
791 | ; /* | |
792 | ** Not a bug. Code like, | |
793 | ** int f (void) { typedef int tint; ... } | |
794 | ** is legal. | |
795 | */ | |
796 | } | |
797 | else | |
798 | { | |
799 | llcontbug (message ("usymtab_supEntryAux: inconsistent state " | |
800 | "(lexlevel = %d, modFunction = %s) adding: %q", | |
801 | st->lexlevel, bool_unparse (sRef_modInFunction ()), | |
802 | uentry_unparse (e))); | |
803 | ||
804 | if (sRef_modInFunction ()) | |
805 | { | |
806 | /* make sure the sRef is not bashed! */ | |
807 | /*@i@*/ e->sref = sRef_saveCopy (e->sref); | |
808 | } | |
809 | } | |
810 | } | |
811 | ||
812 | uentry_mergeDefinition (ce, e); | |
813 | } | |
814 | ||
815 | if (isSref) | |
816 | { | |
817 | ctype ct = uentry_getType (ce); | |
818 | ||
819 | if (uentry_isFunction (ce) && ctype_isFunction (ct)) | |
820 | { | |
821 | ct = ctype_returnValue (ct); | |
822 | } | |
823 | ||
824 | uentry_setSref (ce, sRef_makeCvar (st->lexlevel, eindex, ct)); | |
825 | } | |
826 | } | |
827 | else /* no previous entry */ | |
828 | { | |
829 | uentry outer; | |
830 | ||
831 | if (st->lexlevel == globScope | |
832 | && !uentry_isStatic (e) | |
833 | && !uentry_isExtern (e) | |
834 | && usymtab_isDefined (filetab)) | |
835 | { | |
836 | /* | |
837 | ** check if there is a static entry: (i.e., | |
838 | ** | |
839 | ** static int f (); | |
840 | ** ... | |
841 | ** int f (); | |
842 | */ | |
843 | ||
844 | eindex = usymtab_getIndex (filetab, ename); | |
845 | ||
846 | if (eindex != NOT_FOUND) | |
847 | { | |
848 | uentry ce = filetab->entries[eindex]; | |
849 | ||
850 | uentry_setStatic (e); | |
851 | uentry_mergeDefinition (ce, e); | |
852 | staticEntry = TRUE; | |
853 | goto exitPoint; | |
854 | } | |
855 | } | |
856 | ||
857 | outer = usymtab_lookupQuiet (st->env, ename); | |
858 | ||
859 | /* | |
860 | ** no previous definition, add the new one | |
861 | */ | |
862 | ||
863 | if (!noshadowerror | |
864 | && uentry_isValid (outer) | |
865 | && !(uentry_isYield (e) || uentry_isYield (outer)) | |
866 | && fileloc_isDefined (uentry_whereLast (e)) | |
867 | && fileloc_isDefined (uentry_whereLast (outer))) | |
868 | { | |
869 | if (!uentry_sameKind (outer, e)) | |
870 | { | |
871 | ; /* no error */ | |
872 | } | |
873 | else | |
874 | { | |
875 | if (ctype_isUnknown (uentry_getType (outer)) | |
876 | || uentry_isForward (outer)) | |
877 | { | |
878 | ; | |
879 | } | |
880 | else | |
881 | { | |
882 | if (optgenerror | |
883 | (FLG_SHADOW, | |
884 | message ("%s %q shadows outer declaration", | |
885 | ekind_capName (uentry_getKind (e)), | |
886 | uentry_getName (e)), | |
887 | uentry_whereLast (e))) | |
888 | { | |
889 | uentry_showWhereLast (outer); | |
890 | } | |
891 | } | |
892 | } | |
893 | } | |
894 | ||
895 | if (st == globtab && context_getFlag (FLG_NEWDECL)) | |
896 | { | |
897 | voptgenerror | |
898 | (FLG_NEWDECL, | |
899 | message ("New declaration: %q", uentry_getName (e)), | |
900 | uentry_whereLast (e)); | |
901 | } | |
902 | ||
903 | eindex = usymtab_addEntryAux (st, e, isSref); | |
904 | } | |
905 | ||
906 | exitPoint: | |
907 | return (staticEntry ? USYMIDINVALID : eindex); | |
908 | } | |
909 | ||
910 | # ifndef NOLCL | |
911 | static void | |
912 | usymtab_replaceEntryAux (/*@notnull@*/ usymtab st, /*@only@*/ uentry e) | |
913 | /*@globals globtab@*/ /*@modifies st, e@*/ | |
914 | { | |
915 | cstring ename = uentry_rawName (e); | |
916 | int eindex; | |
917 | ||
918 | /* static tags in global scope */ | |
919 | eindex = usymtab_getIndex (st, ename); | |
920 | ||
921 | if (eindex != NOT_FOUND) | |
922 | { | |
923 | uentry ce = st->entries[eindex]; | |
924 | ||
925 | if (st->htable != NULL) | |
926 | { | |
927 | hashTable_replaceKey (st->htable, uentry_rawName (ce), uentry_rawName (e)); | |
928 | } | |
929 | ||
930 | uentry_free (ce); | |
931 | st->entries[eindex] = e; | |
932 | } | |
933 | else | |
934 | { | |
935 | eindex = usymtab_addEntryAux (st, e, FALSE); | |
936 | } | |
937 | } | |
938 | # endif | |
939 | ||
940 | /*@=deparrays@*/ | |
941 | ||
942 | void usymtab_supEntry (uentry e) | |
943 | /*@globals utab, filetab, globtab@*/ | |
944 | /*@modifies utab, globtab, e@*/ | |
945 | { | |
946 | (void) usymtab_supEntryAux (utab, e, FALSE); | |
947 | } | |
948 | ||
949 | /* | |
950 | ** this should be lots more efficient! | |
951 | */ | |
952 | ||
953 | static /*@exposed@*/ uentry | |
954 | usymtab_supEntryReturnAux (/*@notnull@*/ usymtab tab, | |
955 | /*@only@*/ uentry e, bool isref) | |
956 | /*@globals globtab, filetab@*/ | |
957 | /*@modifies tab, globtab, e@*/ | |
958 | { | |
959 | cstring rawName = cstring_copy (uentry_rawName (e)); | |
960 | bool stat = (tab == globtab) && uentry_isStatic (e); | |
961 | uentry ret; | |
962 | ||
963 | ||
964 | (void) usymtab_supEntryAux (tab, e, isref); | |
965 | ||
966 | if (stat) | |
967 | { | |
968 | ret = usymtab_lookupAux (filetab, rawName); | |
969 | } | |
970 | else | |
971 | { | |
972 | ret = usymtab_lookupAux (tab, rawName); | |
973 | ||
974 | if (uentry_isInvalid (ret) && usymtab_isDefined (filetab)) | |
975 | { | |
976 | ret = usymtab_lookupAux (filetab, rawName); | |
977 | } | |
978 | } | |
979 | ||
980 | cstring_free (rawName); | |
981 | return ret; | |
982 | } | |
983 | ||
984 | /*@dependent@*/ /*@exposed@*/ uentry | |
985 | usymtab_supEntryReturn (/*@only@*/ uentry e) | |
986 | /*@globals utab, filetab, globtab@*/ | |
987 | /*@modifies utab, globtab, e@*/ | |
988 | { | |
989 | return (usymtab_supEntryReturnAux (utab, e, FALSE)); | |
990 | } | |
991 | ||
992 | /*@dependent@*/ /*@exposed@*/ uentry | |
993 | usymtab_supEntrySrefReturn (/*@only@*/ uentry e) | |
994 | /*@globals utab, globtab, filetab@*/ | |
995 | /*@modifies utab, globtab, e@*/ | |
996 | { | |
997 | return (usymtab_supEntryReturnAux (utab, e, TRUE)); | |
998 | } | |
999 | ||
1000 | /*@dependent@*/ /*@exposed@*/ uentry | |
1001 | usymtab_supGlobalEntryReturn (uentry e) | |
1002 | /*@globals globtab, filetab@*/ | |
1003 | /*@modifies globtab, e@*/ | |
1004 | { | |
1005 | uentry ret; | |
1006 | ||
1007 | ret = usymtab_supEntryReturnAux (globtab, e, FALSE); | |
1008 | ||
1009 | if (sRef_modInFunction ()) | |
1010 | { | |
1011 | recordFunctionType (ret); | |
1012 | } | |
1013 | ||
1014 | return (ret); | |
1015 | } | |
1016 | ||
1017 | ctype | |
1018 | usymtab_supTypeEntry (/*@only@*/ uentry e) | |
1019 | /*@globals globtab, filetab@*/ | |
1020 | /*@modifies globtab, e@*/ | |
1021 | { | |
1022 | usymId uid; | |
1023 | ctype ret; | |
1024 | ||
1025 | if (uentry_isAbstractDatatype (e)) | |
1026 | { | |
1027 | uid = usymtab_supAbstractTypeEntry (e, FALSE); | |
1028 | ret = ctype_createAbstract (uid); | |
1029 | } | |
1030 | else | |
1031 | { | |
1032 | uid = usymtab_supEntryAux (globtab, e, FALSE); | |
1033 | ret = ctype_createUser (uid); | |
1034 | } | |
1035 | ||
1036 | if (sRef_modInFunction ()) | |
1037 | { | |
1038 | recordFunctionType (globtab->entries[uid]); | |
1039 | } | |
1040 | ||
1041 | return ret; | |
1042 | } | |
1043 | ||
1044 | uentry | |
1045 | usymtab_supReturnTypeEntry (/*@only@*/ uentry e) | |
1046 | /*@globals globtab, filetab@*/ | |
1047 | /*@modifies globtab@*/ | |
1048 | { | |
1049 | usymId uid; | |
1050 | ||
1051 | if (uentry_isAbstractDatatype (e)) | |
1052 | { | |
1053 | uid = usymtab_supAbstractTypeEntry (e, FALSE); | |
1054 | } | |
1055 | else | |
1056 | { | |
1057 | uid = usymtab_supEntryAux (globtab, e, FALSE); | |
1058 | } | |
1059 | ||
1060 | if (sRef_modInFunction ()) | |
1061 | { | |
1062 | recordFunctionType (globtab->entries[uid]); | |
1063 | } | |
1064 | ||
1065 | return (globtab->entries[uid]); | |
1066 | } | |
1067 | ||
1068 | usymId | |
1069 | usymtab_supAbstractTypeEntry (/*@only@*/ uentry e, bool dodef) | |
1070 | /*@globals globtab, filetab@*/ | |
1071 | /*@modifies globtab, e@*/ | |
1072 | { | |
1073 | usymId uid; | |
1074 | uid = usymtab_supEntryAux (globtab, e, FALSE); | |
1075 | ||
1076 | if (dodef) | |
1077 | { | |
1078 | uentry ue = usymtab_getTypeEntry (uid); | |
1079 | uentry_setDatatype (ue, uid); | |
1080 | } | |
1081 | ||
1082 | if (context_getFlag (FLG_ACCESSMODULE)) | |
1083 | { | |
1084 | context_addFileAccessType (uid); | |
1085 | } | |
1086 | ||
1087 | if (sRef_modInFunction ()) | |
1088 | { | |
1089 | recordFunctionType (globtab->entries[uid]); | |
1090 | } | |
1091 | ||
1092 | return (uid); | |
1093 | } | |
1094 | ||
1095 | # ifndef NOLCL | |
1096 | usymId | |
1097 | usymtab_supExposedTypeEntry (/*@only@*/ uentry e, bool dodef) | |
1098 | /*@globals globtab, filetab@*/ | |
1099 | /*@modifies globtab, e@*/ | |
1100 | { | |
1101 | usymId uid; | |
1102 | ||
1103 | uid = usymtab_supEntryAux (globtab, e, FALSE); | |
1104 | ||
1105 | if (dodef) | |
1106 | { | |
1107 | uentry ue = usymtab_getTypeEntry (uid); | |
1108 | ||
1109 | uentry_setDatatype (ue, uid); | |
1110 | } | |
1111 | ||
1112 | if (sRef_modInFunction ()) | |
1113 | { | |
1114 | recordFunctionType (globtab->entries[uid]); | |
1115 | } | |
1116 | ||
1117 | return (uid); | |
1118 | } | |
1119 | # endif | |
1120 | ||
1121 | ctype | |
1122 | usymtab_supForwardTypeEntry (/*@only@*/ uentry e) | |
1123 | /*@globals globtab, filetab@*/ | |
1124 | /*@modifies globtab, e@*/ | |
1125 | { | |
1126 | usymId uid = usymtab_supEntryAux (globtab, e, FALSE); | |
1127 | uentry ue = usymtab_getTypeEntry (uid); | |
1128 | ||
1129 | uentry_setDatatype (ue, uid); | |
1130 | ||
1131 | if (sRef_modInFunction ()) | |
1132 | { | |
1133 | recordFunctionType (globtab->entries[uid]); | |
1134 | } | |
1135 | ||
1136 | return (uentry_getAbstractType (ue)); | |
1137 | } | |
1138 | ||
1139 | void | |
1140 | usymtab_supEntrySref (uentry e) | |
1141 | /*@globals utab, globtab, filetab@*/ | |
1142 | /*@modifies utab, globtab, e@*/ | |
1143 | { | |
1144 | sRef old = uentry_getSref (e); | |
1145 | ||
1146 | ||
1147 | if (sRef_isType (old)) | |
1148 | { | |
1149 | uentry ue = usymtab_supEntryReturnAux (utab, e, TRUE); | |
1150 | ||
1151 | /*@access uentry@*/ | |
1152 | if (uentry_isValid (ue)) | |
1153 | { | |
1154 | sRef uref = uentry_getSref (ue); | |
1155 | ||
1156 | sRef_mergeStateQuiet (uref, old); | |
1157 | sRef_clearDerived (uref); | |
1158 | } | |
1159 | /*@noaccess uentry@*/ | |
1160 | } | |
1161 | else if (sRef_isKnown (old)) | |
1162 | { | |
1163 | usymtab_supEntry (e); | |
1164 | } | |
1165 | else | |
1166 | { | |
1167 | (void) usymtab_supEntryAux (utab, e, TRUE); | |
1168 | } | |
1169 | } | |
1170 | ||
1171 | void usymtab_supGlobalEntry (/*@only@*/ uentry e) | |
1172 | /*@globals globtab, filetab@*/ | |
1173 | /*@modifies globtab, filetab, e@*/ | |
1174 | { | |
1175 | usymId uid; | |
1176 | ||
1177 | DPRINTF (("Sup global entry: %s", uentry_unparse (e))); | |
1178 | ||
1179 | uid = usymtab_supEntryAux (globtab, e, FALSE); | |
1180 | ||
1181 | if (sRef_modInFunction ()) | |
1182 | { | |
1183 | recordFunctionType (globtab->entries[uid]); | |
1184 | } | |
1185 | } | |
1186 | ||
1187 | uentry | |
1188 | usymtab_supReturnFileEntry (/*@only@*/ uentry e) | |
1189 | /*@globals filetab, globtab@*/ | |
1190 | /*@modifies filetab, globtab, e@*/ | |
1191 | { | |
1192 | llassert (filetab != usymtab_undefined); | |
1193 | DPRINTF (("File entry: %s", uentry_unparse (e))); | |
1194 | return (usymtab_supEntryReturnAux (filetab, e, FALSE)); | |
1195 | } | |
1196 | ||
1197 | /* | |
1198 | ** observers | |
1199 | */ | |
1200 | ||
1201 | bool | |
1202 | usymtab_inDeepScope () /*@globals utab@*/ | |
1203 | { | |
1204 | return (utab->lexlevel > paramsScope); | |
1205 | } | |
1206 | ||
1207 | static int | |
1208 | usymtab_getIndex (/*@notnull@*/ usymtab s, cstring k) | |
1209 | { | |
1210 | int i; | |
1211 | ||
1212 | if (s->htable != NULL) | |
1213 | { | |
1214 | i = hashTable_lookup (s->htable, k); | |
1215 | ||
1216 | return i; | |
1217 | } | |
1218 | else | |
1219 | { | |
1220 | for (i = 0; i < s->nentries; i++) | |
1221 | { | |
1222 | uentry current = s->entries[i]; | |
1223 | ||
1224 | if (!uentry_isUndefined (current) | |
1225 | && cstring_equal (uentry_rawName (current), k)) | |
1226 | { | |
1227 | return i; | |
1228 | } | |
1229 | } | |
1230 | ||
1231 | return NOT_FOUND; | |
1232 | } | |
1233 | } | |
1234 | ||
1235 | static uentry | |
1236 | usymtab_fetchIndex (/*@notnull@*/ usymtab s, int i) | |
1237 | { | |
1238 | llassert (i >= 0 && i < s->nentries); | |
1239 | return (s->entries[i]); | |
1240 | } | |
1241 | ||
1242 | usymId | |
1243 | usymtab_getTypeId (cstring k) /*@globals globtab@*/ | |
1244 | { | |
1245 | usymId uid = usymtab_getIndex (globtab, k); | |
1246 | ||
1247 | if (uid == NOT_FOUND) return USYMIDINVALID; | |
1248 | ||
1249 | if (!(uentry_isDatatype (usymtab_getTypeEntry (uid)))) { | |
1250 | return USYMIDINVALID; | |
1251 | } | |
1252 | ||
1253 | return uid; | |
1254 | } | |
1255 | ||
1256 | /*@dependent@*/ uentry | |
1257 | usymtab_lookupStructTag (cstring k) | |
1258 | { | |
1259 | cstring sname = makeStruct (k); | |
1260 | uentry ue = usymtab_lookupGlob (sname); | |
1261 | cstring_free (sname); | |
1262 | return (ue); | |
1263 | } | |
1264 | ||
1265 | /*@dependent@*/ uentry | |
1266 | usymtab_lookupUnionTag (cstring k) | |
1267 | { | |
1268 | cstring uname = makeUnion (k); | |
1269 | uentry res = usymtab_lookupGlob (uname); | |
1270 | ||
1271 | cstring_free (uname); | |
1272 | return res; | |
1273 | } | |
1274 | ||
1275 | /*@dependent@*/ uentry | |
1276 | usymtab_lookupEnumTag (cstring k) | |
1277 | { | |
1278 | cstring ename = makeEnum (k); | |
1279 | uentry res = usymtab_lookupGlob (ename); | |
1280 | ||
1281 | cstring_free (ename); | |
1282 | return res; | |
1283 | } | |
1284 | ||
1285 | usymId | |
1286 | usymtab_getId (cstring k) /*@globals globtab@*/ | |
1287 | { | |
1288 | usymId uid = usymtab_getIndex (globtab, k); | |
1289 | uentry ue; | |
1290 | ||
1291 | if (uid == NOT_FOUND) | |
1292 | { | |
1293 | return USYMIDINVALID; | |
1294 | } | |
1295 | ||
1296 | ue = usymtab_getGlobalEntry (uid); | |
1297 | ||
1298 | if (uentry_isPriv (ue)) | |
1299 | { | |
1300 | return USYMIDINVALID; | |
1301 | } | |
1302 | ||
1303 | return uid; | |
1304 | } | |
1305 | ||
1306 | static /*@exposed@*/ uentry | |
1307 | usymtab_getEntryAux (/*@notnull@*/ usymtab s, usymId uid) | |
1308 | { | |
1309 | llassert (uid != USYMIDINVALID); | |
1310 | ||
1311 | if (uid < 0 || uid >= s->nentries) | |
1312 | { | |
1313 | llcontbug (message ("usymtab_getEntry: out of range: level = %d [%d]", | |
1314 | s->lexlevel, uid)); | |
1315 | return uentry_undefined; | |
1316 | } | |
1317 | ||
1318 | llassertprint (uentry_isValid (s->entries[uid]), | |
1319 | ("entry undefined: %d", uid)); | |
1320 | ||
1321 | return s->entries[uid]; | |
1322 | } | |
1323 | ||
1324 | /*@dependent@*/ /*@observer@*/ uentry | |
1325 | usymtab_getGlobalEntry (usymId uid) | |
1326 | /*@globals utab, globtab@*/ | |
1327 | { | |
1328 | if (dbgfree) return (uentry_undefined); | |
1329 | ||
1330 | if (utab->lexlevel > paramsScope) | |
1331 | { | |
1332 | /* need to do this the awkward way, since it could be in conditional scope */ | |
1333 | return (usymtab_lookupSafe (uentry_rawName (globtab->entries[uid]))); | |
1334 | } | |
1335 | else | |
1336 | { | |
1337 | return (globtab->entries[uid]); | |
1338 | } | |
1339 | } | |
1340 | ||
1341 | /*@dependent@*/ /*@exposed@*/ uentry | |
1342 | usymtab_getTypeEntry (usymId uid) | |
1343 | /*@globals globtab@*/ | |
1344 | { | |
1345 | if (dbgload) | |
1346 | { | |
1347 | if (uid >= 0 && uid < globtab->nentries) | |
1348 | { | |
1349 | return (globtab->entries[uid]); | |
1350 | } | |
1351 | else | |
1352 | { | |
1353 | return (uentry_undefined); | |
1354 | } | |
1355 | } | |
1356 | else | |
1357 | { | |
1358 | llassert (uid >= 0 && uid < globtab->nentries); | |
1359 | ||
1360 | return (globtab->entries[uid]); | |
1361 | } | |
1362 | } | |
1363 | ||
1364 | /* | |
1365 | ** in load files | |
1366 | */ | |
1367 | ||
1368 | /*@dependent@*/ /*@exposed@*/ uentry | |
1369 | usymtab_getTypeEntrySafe (usymId uid) | |
1370 | /*@globals globtab@*/ | |
1371 | { | |
1372 | if (uid < 0 || uid >= globtab->nentries) | |
1373 | { | |
1374 | return uentry_undefined; | |
1375 | } | |
1376 | ||
1377 | return (globtab->entries[uid]); | |
1378 | } | |
1379 | ||
1380 | bool | |
1381 | usymtab_isBoolType (usymId uid) | |
1382 | /*@globals globtab@*/ | |
1383 | { | |
1384 | llassert (uid >= 0 && uid < globtab->nentries); | |
1385 | ||
1386 | return (cstring_equal (uentry_rawName (globtab->entries[uid]), | |
1387 | context_getBoolName ())); | |
1388 | } | |
1389 | ||
1390 | cstring | |
1391 | usymtab_getTypeEntryName (usymId uid) | |
1392 | /*@globals globtab@*/ | |
1393 | { | |
1394 | uentry ue; | |
1395 | ||
1396 | if (dbgfree) | |
1397 | { | |
1398 | return (cstring_makeLiteral ("<freetype>")); | |
1399 | } | |
1400 | ||
1401 | ue = usymtab_getTypeEntry (uid); | |
1402 | ||
1403 | if (dbgload && !uentry_isValid (ue)) | |
1404 | { | |
1405 | return (message ("<missing type: %d>", uid)); | |
1406 | } | |
1407 | ||
1408 | llassertprint (uentry_isValid (ue), ("type undefined: %d", uid)); | |
1409 | ||
1410 | return (uentry_getName (ue)); | |
1411 | } | |
1412 | ||
1413 | static void | |
1414 | usymtab_rehash (/*@notnull@*/ usymtab s) | |
1415 | { | |
1416 | int i; | |
1417 | ||
1418 | if (s->htable != NULL) | |
1419 | { | |
1420 | hashTable_free (s->htable); | |
1421 | } | |
1422 | ||
1423 | s->htable = hashTable_create (LLHASHSIZE); | |
1424 | ||
1425 | for (i = 0; i < s->nentries; i++) | |
1426 | { | |
1427 | hashTable_insert (s->htable, uentry_rawName (s->entries[i]), i); | |
1428 | } | |
1429 | } | |
1430 | ||
1431 | /* | |
1432 | ** superficial copy of usymtab | |
1433 | ** | |
1434 | ** DO copy spec entries | |
1435 | */ | |
1436 | ||
1437 | static /*@only@*/ /*@notnull@*/ usymtab | |
1438 | usymtab_shallowCopy (/*@notnull@*/ usymtab s) /*@*/ | |
1439 | { | |
1440 | usymtab copytab = usymtab_createRoot (); | |
1441 | int i; | |
1442 | ||
1443 | for (i = 0; i < s->nentries; i++) | |
1444 | { | |
1445 | usymtab_addEntryBase (copytab, s->entries[i]); | |
1446 | } | |
1447 | ||
1448 | return copytab; | |
1449 | } | |
1450 | ||
1451 | static void | |
1452 | usymtab_shallowFree (/*@only@*/ /*@notnull@*/ usymtab s) | |
1453 | { | |
1454 | aliasTable_free (s->aliases); | |
1455 | refTable_free (s->reftable, s->nentries); | |
1456 | sfree (s->entries); | |
1457 | /*@-compdestroy@*/ sfree (s); /*@=compdestroy@*/ | |
1458 | } | |
1459 | ||
1460 | /* | |
1461 | ** converts usymId from old table to sorted one | |
1462 | */ | |
1463 | ||
1464 | usymId | |
1465 | usymtab_convertId (usymId uid) | |
1466 | /*@globals oldtab, utab@*/ | |
1467 | { | |
1468 | uentry ue; | |
1469 | usymId ret; | |
1470 | cstring name; | |
1471 | ||
1472 | llassert (usymtab_isDefined (oldtab)); | |
1473 | ||
1474 | ue = usymtab_getEntryAux (oldtab, uid); | |
1475 | ||
1476 | llassertprint (uentry_isValid (ue), ("convertId: undefined: %d", uid)); | |
1477 | ||
1478 | name = uentry_rawName (ue); | |
1479 | ||
1480 | ret = usymtab_getIndex (utab, name); | |
1481 | ||
1482 | llassertprint (ret != USYMIDINVALID, ("convertId: return is invalid")); | |
1483 | ||
1484 | return (ret); | |
1485 | } | |
1486 | ||
1487 | void | |
1488 | usymtab_prepareDump (void) | |
1489 | /*@globals oldtab, utab@*/ | |
1490 | /*@modifies oldtab, utab@*/ | |
1491 | { | |
1492 | llassert (usymtab_inGlobalScope ()); | |
1493 | ||
1494 | llassert (oldtab == usymtab_undefined); | |
1495 | ||
1496 | oldtab = usymtab_shallowCopy (utab); | |
1497 | ||
1498 | /* | |
1499 | alpha compare - make sure order is same on different platforms | |
1500 | error messages appear in same order | |
1501 | */ | |
1502 | ||
1503 | qsort (utab->entries, (size_t)utab->nentries, | |
1504 | sizeof (*utab->entries), (int (*)(const void *, const void *)) uentry_xcomparealpha); | |
1505 | ||
1506 | usymtab_rehash (utab); | |
1507 | } | |
1508 | ||
1509 | void | |
1510 | usymtab_dump (FILE *fout) | |
1511 | /*@globals utab, oldtab@*/ | |
1512 | { | |
1513 | int i; | |
1514 | bool neednl = FALSE; | |
1515 | uentry lastentry = uentry_undefined; | |
1516 | ekind lastekind = KINVALID; | |
1517 | int linelen = 0; | |
1518 | ||
1519 | /* | |
1520 | ** must call prepareDump first | |
1521 | */ | |
1522 | ||
1523 | llassert (oldtab != usymtab_undefined); | |
1524 | ||
1525 | for (i = 0; i < utab->nentries; i++) | |
1526 | { | |
1527 | uentry thisentry = utab->entries[i]; | |
1528 | ekind thisekind = uentry_getKind (thisentry); | |
1529 | ||
1530 | ||
1531 | if (uentry_hasRealName (thisentry)) { | |
1532 | if (thisekind != lastekind) | |
1533 | { | |
1534 | if (neednl) | |
1535 | { | |
1536 | check (fputc ('\n', fout) == (int) '\n'); | |
1537 | } | |
1538 | ||
1539 | neednl = FALSE; | |
1540 | lastentry = uentry_undefined; | |
1541 | fprintf (fout, "*%d (%s)\n", ekind_toInt (thisekind), | |
1542 | cstring_toCharsSafe (ekind_capName (thisekind))); | |
1543 | lastekind = thisekind; | |
1544 | linelen = 0; | |
1545 | } | |
1546 | ||
1547 | if (uentry_isInvalid (lastentry) || !uentry_equiv (lastentry, thisentry) | |
1548 | || (linelen > (MAX_DUMP_LINE_LENGTH - (2 * MAX_NAME_LENGTH)))) | |
1549 | { | |
1550 | cstring cdump = uentry_dump (thisentry); | |
1551 | ||
1552 | lastentry = thisentry; | |
1553 | if (neednl) | |
1554 | { | |
1555 | check (fputc ('\n', fout) == (int) '\n'); | |
1556 | linelen = 0; | |
1557 | } | |
1558 | ||
1559 | linelen += cstring_length (cdump); | |
1560 | ||
1561 | /* no new line here! */ | |
1562 | if (cstring_length (cdump) > 0) | |
1563 | { | |
1564 | check (fputs (cstring_toCharsSafe (cdump), fout) != EOF); | |
1565 | } | |
1566 | ||
1567 | cstring_free (cdump); | |
1568 | neednl = TRUE; | |
1569 | } | |
1570 | else | |
1571 | { | |
1572 | cstring cdump = uentry_rawName (thisentry); | |
1573 | linelen += cstring_length (cdump); | |
1574 | fprintf (fout, "#%s", cstring_toCharsSafe (cdump)); | |
1575 | } | |
1576 | } | |
1577 | } | |
1578 | ||
1579 | if (neednl) | |
1580 | { | |
1581 | check (fputc ('\n', fout) == (int) '\n'); | |
1582 | } | |
1583 | } | |
1584 | ||
1585 | void usymtab_load (FILE *f) | |
1586 | /*@globals utab, globtab@*/ | |
1587 | /*@modifies utab, *f@*/ | |
1588 | { | |
1589 | char *s = mstring_create (MAX_DUMP_LINE_LENGTH); | |
1590 | char *os = s; | |
1591 | ekind kind = KINVALID; | |
1592 | fileloc loc = g_currentloc; | |
1593 | char c; | |
1594 | uentry ue; | |
1595 | ||
1596 | dbgload = TRUE; | |
1597 | ||
1598 | llassert (utab == globtab); | |
1599 | llassert (utab->nentries == 0); | |
1600 | ||
1601 | while (fgets (s, MAX_DUMP_LINE_LENGTH, f) != NULL | |
1602 | && *s == ';') | |
1603 | { | |
1604 | ; /* ignore ;-comments */ | |
1605 | } | |
1606 | ||
1607 | while (s != NULL && *s != ';') | |
1608 | { | |
1609 | ||
1610 | if (*s == '*') | |
1611 | { | |
1612 | s++; | |
1613 | kind = ekind_fromInt (getInt (&s)); | |
1614 | ||
1615 | goto nextiter; | |
1616 | } | |
1617 | ||
1618 | if (*s == '$') | |
1619 | { | |
1620 | llfatalerror | |
1621 | (cstring_makeLiteral | |
1622 | ("Library is in obsolete format. Use lclint +whichlib " | |
1623 | "to see which library is being loaded.")); | |
1624 | } | |
1625 | ||
1626 | ue = uentry_undump (kind, loc, &s); | |
1627 | DPRINTF (("Load: %s", uentry_unparseFull (ue))); | |
1628 | ||
1629 | if (uentry_isValid (ue)) | |
1630 | { | |
1631 | ue = usymtab_addEntryBase (utab, ue); | |
1632 | /*@-branchstate@*/ | |
1633 | } | |
1634 | /*@=branchstate@*/ | |
1635 | ||
1636 | /* | |
1637 | ** now, any other names are the same uentry | |
1638 | */ | |
1639 | ||
1640 | while (*(s++) == '#') | |
1641 | { | |
1642 | cstring name = cstring_fromCharsO (getWord (&s)); | |
1643 | uentry nue = uentry_nameCopy (name, ue); | |
1644 | ||
1645 | DPRINTF (("Name copy: %s", uentry_unparseFull (nue))); | |
1646 | usymtab_addEntryBase (utab, nue); | |
1647 | } | |
1648 | ||
1649 | while ((c = *s) != '\0' && (c !='\n')) | |
1650 | { | |
1651 | if (c != ' ' || c != '\t') | |
1652 | { | |
1653 | llbuglit ("Junk in load file"); | |
1654 | } | |
1655 | ||
1656 | s++; | |
1657 | } | |
1658 | ||
1659 | nextiter: | |
1660 | s = fgets (os, MAX_DUMP_LINE_LENGTH, f); | |
1661 | } | |
1662 | ||
1663 | dbgload = FALSE; | |
1664 | sfree (os); | |
1665 | } | |
1666 | ||
1667 | /* | |
1668 | ** file scope for static variables | |
1669 | */ | |
1670 | ||
1671 | void | |
1672 | usymtab_enterFile () | |
1673 | /*@globals utab, globtab, filetab@*/ | |
1674 | /*@modifies filetab@*/ | |
1675 | { | |
1676 | llassert (utab == globtab); | |
1677 | ||
1678 | # if 0 | |
1679 | /* check globals */ | |
1680 | ||
1681 | usymtab_entries (globtab, ue) | |
1682 | { | |
1683 | if (sRef_hasDerived (uentry_getSref (ue))) | |
1684 | { | |
1685 | fprintf (g_msgstream, "Derived Global: %s\n", uentry_unparse (ue)); | |
1686 | fprintf (g_msgstream, "sRef: %s\n", sRef_unparseFull (ue->sref)); | |
1687 | } | |
1688 | } end_usymtab_entries ; | |
1689 | ||
1690 | # endif | |
1691 | ||
1692 | usymtab_enterScope (); | |
1693 | filetab = utab; | |
1694 | } | |
1695 | ||
1696 | void | |
1697 | usymtab_exitFile () | |
1698 | /*@globals utab, filetab@*/ | |
1699 | /*@modifies filetab, utab@*/ | |
1700 | { | |
1701 | ||
1702 | llassert (utab->lexlevel == 1); | |
1703 | ||
1704 | usymtab_exitScope (exprNode_undefined); | |
1705 | filetab = NULL; | |
1706 | } | |
1707 | ||
1708 | void | |
1709 | usymtab_enterScope () | |
1710 | /*@globals utab, globtab, filetab@*/ | |
1711 | /*@modifies utab@*/ | |
1712 | { | |
1713 | usymtab t = usymtab_create (US_NORMAL, utab, TRUE); | |
1714 | ||
1715 | /* unconditional scope: optimize to avoid copy */ | |
1716 | t->aliases = aliasTable_copy (utab->aliases); | |
1717 | utab = t; | |
1718 | ||
1719 | llassert (usymtab_isDefined (t->env)); | |
1720 | ||
1721 | if (t->env->lexlevel == paramsScope && context_inFunctionLike ()) | |
1722 | { | |
1723 | noshadowerror = TRUE; | |
1724 | usymtab_handleParams (); | |
1725 | noshadowerror = FALSE; | |
1726 | } | |
1727 | } | |
1728 | ||
1729 | /* | |
1730 | ** setup external references: | |
1731 | ** o only, unique params alias external args | |
1732 | ** o other params may alias anything of their type | |
1733 | */ | |
1734 | ||
1735 | static void | |
1736 | usymtab_handleParams (void) | |
1737 | /*@globals utab, globtab, filetab@*/ | |
1738 | /*@modifies utab, globtab@*/ | |
1739 | { | |
1740 | usymtab ptab = utab->env; | |
1741 | uentry fcn = context_getHeader (); | |
1742 | ||
1743 | ||
1744 | usymtab_entries (ptab, param) | |
1745 | { | |
1746 | uentry ue; | |
1747 | ||
1748 | if (!uentry_isYield (param)) | |
1749 | { | |
1750 | sRef uref; | |
1751 | sRef pref = uentry_getSref (param); | |
1752 | ||
1753 | llassertprint (uentry_isAnyParam (param), | |
1754 | ("not param: %s", | |
1755 | uentry_unparseFull (param))); | |
1756 | ||
1757 | ||
1758 | ue = uentry_makeVariable (fixParamName (uentry_rawName (param)), | |
1759 | uentry_getType (param), | |
1760 | fileloc_copy (uentry_whereDeclared (param)), | |
1761 | FALSE); | |
1762 | ||
1763 | uentry_copyState (ue, param); | |
1764 | uentry_setRefParam (ue); | |
1765 | ||
1766 | ue = usymtab_supEntrySrefReturn (ue); | |
1767 | ||
1768 | /* must be after supercede! */ | |
1769 | ||
1770 | if (!sRef_stateKnown (pref)) | |
1771 | { | |
1772 | uentry_setDefState (ue, SS_DEFINED); | |
1773 | uentry_setDefState (param, SS_DEFINED); | |
1774 | } | |
1775 | else | |
1776 | { | |
1777 | if (sRef_isStateSpecial (pref)) | |
1778 | { | |
1779 | uentry_setDefState (ue, SS_ALLOCATED); | |
1780 | } | |
1781 | else | |
1782 | { | |
1783 | uentry_setDefState (ue, sRef_getDefState (pref)); | |
1784 | } | |
1785 | } | |
1786 | ||
1787 | uref = uentry_getSref (ue); | |
1788 | ||
1789 | if (sRef_isStack (uref)) | |
1790 | { | |
1791 | alkind pkind = sRef_getAliasKind (pref); | |
1792 | ||
1793 | if (alkind_isKnown (pkind) && !alkind_isLocal (pkind) | |
1794 | && !alkind_isStack (pkind)) | |
1795 | { | |
1796 | sRef_setAliasKind (uref, pkind, fileloc_undefined); | |
1797 | sRef_setOrigAliasKind (uref, pkind); | |
1798 | } | |
1799 | else | |
1800 | { | |
1801 | sRef_setAliasKind (uref, AK_IMPTEMP, fileloc_undefined); | |
1802 | sRef_setOrigAliasKind (uref, AK_IMPTEMP); | |
1803 | ||
1804 | if (uentry_isOut (param)) | |
1805 | { | |
1806 | ; | |
1807 | } | |
1808 | else | |
1809 | { | |
1810 | sRef_setDefined (uref, fileloc_undefined); | |
1811 | } | |
1812 | } | |
1813 | ||
1814 | } | |
1815 | ||
1816 | usymtab_addMustAlias (uref, pref); | |
1817 | ||
1818 | if (!(uentry_isOnly (param) || uentry_isUnique (param))) | |
1819 | { | |
1820 | sRef s = sRef_makeExternal (uref); | |
1821 | ||
1822 | usymtab_addMustAlias (uref, s); | |
1823 | } | |
1824 | ||
1825 | if (sRef_isKillRef (pref)) | |
1826 | { | |
1827 | sRef_setAliasKind (uref, AK_NEWREF, fileloc_undefined); | |
1828 | sRef_setOrigAliasKind (uref, AK_KILLREF); | |
1829 | } | |
1830 | else if (sRef_isRefCounted (uref)) | |
1831 | { | |
1832 | sRef_setOrigAliasKind (uref, AK_REFCOUNTED); | |
1833 | } | |
1834 | else | |
1835 | { | |
1836 | /* was AK_UNIQUE */ | |
1837 | sRef_setOrigAliasKind (uref, AK_LOCAL); | |
1838 | } | |
1839 | } | |
1840 | else | |
1841 | { | |
1842 | } | |
1843 | } end_usymtab_entries; | |
1844 | ||
1845 | ||
1846 | if (uentry_hasSpecialClauses (fcn)) | |
1847 | { | |
1848 | specialClauses clauses = uentry_getSpecialClauses (fcn); | |
1849 | ||
1850 | specialClauses_preElements (clauses, cl) | |
1851 | { | |
1852 | sRefSet refs = specialClause_getRefs (cl); | |
1853 | sRefMod modf = specialClause_getEntryFunction (cl); | |
1854 | ||
1855 | ||
1856 | sRefSet_elements (refs, el) | |
1857 | { | |
1858 | sRef base = sRef_getRootBase (el); | |
1859 | ||
1860 | if (sRef_isResult (base)) | |
1861 | { | |
1862 | ; /* nothing to do before */ | |
1863 | } | |
1864 | else if (sRef_isParam (base)) | |
1865 | { | |
1866 | if (modf != NULL) | |
1867 | { | |
1868 | sRef sb = sRef_updateSref (el); | |
1869 | sRefSet aliases = usymtab_allAliases (sb); | |
1870 | ||
1871 | modf (sb, fileloc_undefined); | |
1872 | ||
1873 | sRefSet_elements (aliases, sr) | |
1874 | { | |
1875 | modf (sr, fileloc_undefined); | |
1876 | } end_sRefSet_elements ; | |
1877 | ||
1878 | sRefSet_free (aliases); | |
1879 | } | |
1880 | } | |
1881 | else | |
1882 | { | |
1883 | if (sRef_isValid (base)) | |
1884 | { | |
1885 | BADBRANCH; | |
1886 | } | |
1887 | } | |
1888 | } end_sRefSet_elements ; | |
1889 | } end_specialClauses_preElements ; | |
1890 | } | |
1891 | } | |
1892 | ||
1893 | void | |
1894 | usymtab_enterFunctionScope (uentry fcn) | |
1895 | /*@globals utab, filetab, globtab@*/ | |
1896 | /*@modifies utab@*/ | |
1897 | { | |
1898 | usymtab t = usymtab_create (US_NORMAL, utab, TRUE); | |
1899 | ||
1900 | if (utab->lexlevel != fileScope) | |
1901 | { | |
1902 | if (utab->lexlevel > fileScope) | |
1903 | { | |
1904 | llparseerror (cstring_makeLiteral ("New function scope inside function.")); | |
1905 | ||
1906 | while (utab->lexlevel > fileScope) | |
1907 | { | |
1908 | /*@i@*/ utab = usymtab_dropEnv (utab); | |
1909 | /*@-branchstate@*/ | |
1910 | } | |
1911 | /*@=branchstate@*/ | |
1912 | } | |
1913 | else | |
1914 | { | |
1915 | llfatalbug (cstring_makeLiteral ("New function not inside file.")); | |
1916 | } | |
1917 | /*@-branchstate@*/ } /*@=branchstate@*/ | |
1918 | ||
1919 | globSet_allElements (uentry_getGlobs (fcn), el) | |
1920 | { | |
1921 | ||
1922 | if (sRef_isUndefGlob (el)) | |
1923 | { | |
1924 | int index = sRef_getScopeIndex (el); | |
1925 | sRef sr = sRef_updateSref (el); | |
1926 | fileloc loc = uentry_whereEarliest (fcn); | |
1927 | ||
1928 | if (sRef_isFileStatic (el)) | |
1929 | { | |
1930 | ctype ct = sRef_getType (el); | |
1931 | uentry ue; | |
1932 | ||
1933 | llassert (usymtab_isDefined (filetab)); | |
1934 | ||
1935 | ue = usymtab_fetchIndex (filetab, index); | |
1936 | ||
1937 | if (ctype_isRealArray (ct) || ctype_isRealSU (ct)) | |
1938 | { | |
1939 | sRef_setAllocated (sr, loc); | |
1940 | } | |
1941 | else | |
1942 | { | |
1943 | sRef_setUndefined (sr, loc); | |
1944 | } | |
1945 | } | |
1946 | else | |
1947 | { | |
1948 | uentry ue = globtab->entries[index]; | |
1949 | ctype ct = uentry_getType (ue); | |
1950 | ||
1951 | if (ctype_isArray (ct) || ctype_isSU (ct)) | |
1952 | { | |
1953 | sRef_setAllocated (sr, loc); | |
1954 | } | |
1955 | else | |
1956 | { | |
1957 | sRef_setUndefined (sr, loc); | |
1958 | } | |
1959 | } | |
1960 | } | |
1961 | else if (sRef_isAllocated (el)) | |
1962 | { | |
1963 | sRef sr = sRef_updateSref (el); | |
1964 | fileloc loc = uentry_whereEarliest (fcn); | |
1965 | ||
1966 | sRef_setAllocated (sr, loc); | |
1967 | } | |
1968 | else if (sRef_isPartial (el)) | |
1969 | { | |
1970 | sRef sr = sRef_updateSref (el); | |
1971 | fileloc loc = uentry_whereEarliest (fcn); | |
1972 | ||
1973 | sRef_setPartial (sr, loc); | |
1974 | } | |
1975 | else | |
1976 | { | |
1977 | /* defined */ ; | |
1978 | } | |
1979 | } end_globSet_allElements; | |
1980 | ||
1981 | utab = t; | |
1982 | } | |
1983 | ||
1984 | static void | |
1985 | usymtab_caseBranch (void) | |
1986 | /*@modifies utab@*/ | |
1987 | { | |
1988 | usymtab t = usymtab_create (US_CBRANCH, utab, FALSE); | |
1989 | utab = t; | |
1990 | } | |
1991 | ||
1992 | void | |
1993 | usymtab_switchBranch (/*@unused@*/ exprNode s) | |
1994 | /*@modifies utab@*/ | |
1995 | { | |
1996 | usymtab t = usymtab_create (US_SWITCH, utab, FALSE); | |
1997 | ||
1998 | t->aliases = aliasTable_copy (utab->aliases); | |
1999 | utab = t; | |
2000 | } | |
2001 | ||
2002 | void | |
2003 | usymtab_trueBranch (/*@only@*/ guardSet guards) | |
2004 | /*@modifies utab@*/ | |
2005 | { | |
2006 | usymtab t = usymtab_create (US_TBRANCH, utab, FALSE); | |
2007 | ||
2008 | /* | |
2009 | ** not true! (could be in a macro) | |
2010 | ** | |
2011 | ** llassertprint (utab->lexlevel > paramsScope, | |
2012 | ** ("not in scope: %s", usymtab_unparseLocal ())); | |
2013 | ** | |
2014 | */ | |
2015 | ||
2016 | guardSet_free (t->guards); | |
2017 | t->guards = guards; | |
2018 | ||
2019 | aliasTable_free (t->aliases); | |
2020 | t->aliases = aliasTable_copy (utab->aliases); | |
2021 | ||
2022 | utab = t; | |
2023 | } | |
2024 | ||
2025 | /* | |
2026 | ** consider, | |
2027 | ** | |
2028 | ** { int a; if (...) a = 3; < a may be undefined here! | |
2029 | ** | |
2030 | */ | |
2031 | ||
2032 | void | |
2033 | usymtab_popTrueBranch (exprNode pred, exprNode expr, clause cl) | |
2034 | { | |
2035 | /* | |
2036 | ** add a false branch | |
2037 | ** (could be done more efficiently as a special case, but | |
2038 | ** it is better to only maintain one version of the code) | |
2039 | */ | |
2040 | ||
2041 | usymtab_altBranch (guardSet_invert (exprNode_getGuards (pred))); | |
2042 | usymtab_popBranches (pred, expr, exprNode_undefined, TRUE, cl); | |
2043 | } | |
2044 | ||
2045 | void | |
2046 | usymtab_popCaseBranch () /*@modifies utab@*/ | |
2047 | { | |
2048 | llassert (utab->kind == US_CBRANCH); | |
2049 | usymtab_quietPlainExitScope (); | |
2050 | } | |
2051 | ||
2052 | void | |
2053 | usymtab_popTrueExecBranch (exprNode pred, exprNode expr, clause cl) | |
2054 | { | |
2055 | /* | |
2056 | ** add a false branch that must return --- that is, | |
2057 | ** the true branch is always executed! | |
2058 | */ | |
2059 | ||
2060 | usymtab_altBranch (guardSet_invert (exprNode_getGuards (pred))); | |
2061 | usymtab_popBranches (pred, expr, exprNode_makeMustExit (), FALSE, cl); | |
2062 | } | |
2063 | ||
2064 | void | |
2065 | usymtab_popOrBranch (exprNode pred, exprNode expr) | |
2066 | /*@modifies utab@*/ | |
2067 | { | |
2068 | bool mustReturn; | |
2069 | usymtab env = utab->env; | |
2070 | usymtab otab = utab; | |
2071 | int i = 0; | |
2072 | ||
2073 | llassert (env != NULL); | |
2074 | ||
2075 | if (exprNode_isError (expr)) | |
2076 | { | |
2077 | mustReturn = FALSE; | |
2078 | } | |
2079 | else | |
2080 | { | |
2081 | mustReturn = exprNode_mustEscape (expr); | |
2082 | } | |
2083 | ||
2084 | ||
2085 | llassert (utab->kind == US_TBRANCH); | |
2086 | ||
2087 | /* | |
2088 | ** merge each entry in table with its original | |
2089 | ** unless execution cannot continue after this branch | |
2090 | */ | |
2091 | ||
2092 | for (i = 0; i < utab->nentries; i++) | |
2093 | { | |
2094 | uentry current = utab->entries[i]; | |
2095 | uentry old = usymtab_lookupAux (env, uentry_rawName (current)); | |
2096 | ||
2097 | uentry_mergeState (old, current, exprNode_loc (expr), | |
2098 | mustReturn, FALSE, TRUE, ORCLAUSE); | |
2099 | } | |
2100 | ||
2101 | ||
2102 | if (mustReturn) | |
2103 | { | |
2104 | env->guards = guardSet_levelUnionFree (env->guards, | |
2105 | guardSet_invert (exprNode_getGuards (pred)), | |
2106 | env->lexlevel); | |
2107 | } | |
2108 | else | |
2109 | { | |
2110 | env->aliases = aliasTable_levelUnion (env->aliases, otab->aliases, env->lexlevel); | |
2111 | } | |
2112 | ||
2113 | /* env is now utab */ | |
2114 | usymtab_quietPlainExitScope (); | |
2115 | } | |
2116 | ||
2117 | /* | |
2118 | ** case syntax in C is very unrestricted. This is unfortunate. | |
2119 | ** | |
2120 | ** A switch case is ended either by a new case or default, or | |
2121 | ** a close } that may close the switch or some other control | |
2122 | ** structure. | |
2123 | */ | |
2124 | ||
2125 | bool | |
2126 | usymtab_newCase (/*@unused@*/ exprNode pred, exprNode last) | |
2127 | /*@modifies utab@*/ | |
2128 | { | |
2129 | bool mustBreak = usymtab_mustBreak (utab); | |
2130 | bool mustReturn = usymtab_mustEscape (utab); | |
2131 | usymtab stab = utab; | |
2132 | ||
2133 | /* | |
2134 | ** Find last case (or outer switch) | |
2135 | */ | |
2136 | ||
2137 | while (stab->kind != US_CBRANCH && stab->kind != US_SWITCH) | |
2138 | { | |
2139 | stab = stab->env; | |
2140 | llassert (stab != GLOBAL_ENV); | |
2141 | } | |
2142 | ||
2143 | /* ??? */ | |
2144 | ||
2145 | while (stab->kind == US_CBRANCH) | |
2146 | { | |
2147 | stab = stab->env; | |
2148 | llassert (stab != GLOBAL_ENV); | |
2149 | } | |
2150 | ||
2151 | /* | |
2152 | ** if its a fall through case, merge in outside entries and last case. | |
2153 | ** | |
2154 | ** e.g., | |
2155 | ** ... | |
2156 | ** switch | |
2157 | ** case 1: x = 3; <fall through> | |
2158 | ** case 2: << x may not be defined | |
2159 | ** | |
2160 | */ | |
2161 | ||
2162 | if (!mustBreak && !mustReturn && utab->kind == US_CBRANCH) | |
2163 | { | |
2164 | llassert (stab->kind == US_SWITCH || stab->kind == US_NORMAL); | |
2165 | ||
2166 | usymtab_entries (utab, ue) /* but, keep track of used variables */ | |
2167 | { | |
2168 | uentry old = usymtab_lookupAux (stab, uentry_rawName (ue)); | |
2169 | ||
2170 | llassert (uentry_isValid (old)); | |
2171 | ||
2172 | /* modifies ue, not old */ | |
2173 | ||
2174 | uentry_mergeState (ue, old, exprNode_loc (last), | |
2175 | FALSE, FALSE, TRUE, CASECLAUSE); | |
2176 | } end_usymtab_entries; | |
2177 | ||
2178 | utab->aliases = aliasTable_levelUnion (utab->aliases, | |
2179 | stab->aliases, utab->lexlevel); | |
2180 | ||
2181 | /* | |
2182 | ** No need for a new branch. | |
2183 | */ | |
2184 | ||
2185 | return FALSE; | |
2186 | } | |
2187 | else | |
2188 | { | |
2189 | usymtab_caseBranch (); | |
2190 | /*@-mustfree@*/ /*< utab->aliases >*/ | |
2191 | utab->aliases = aliasTable_copy (stab->aliases); | |
2192 | /*@=mustfree@*/ | |
2193 | ||
2194 | return TRUE; | |
2195 | } | |
2196 | } | |
2197 | ||
2198 | /* | |
2199 | ** for && (both pred and expr are executed) | |
2200 | */ | |
2201 | ||
2202 | void | |
2203 | usymtab_popAndBranch (exprNode pred, /*@unused@*/ exprNode expr) | |
2204 | /*@modifies utab@*/ | |
2205 | { | |
2206 | usymtab env = utab->env; | |
2207 | usymtab otab= utab; | |
2208 | int i = 0; | |
2209 | ||
2210 | llassert (utab->kind == US_TBRANCH); | |
2211 | ||
2212 | /* | |
2213 | ** merge each entry in table with its original | |
2214 | ** unless execution cannot continue after this branch | |
2215 | */ | |
2216 | ||
2217 | for (i = 0; i < utab->nentries; i++) | |
2218 | { | |
2219 | uentry current = utab->entries[i]; | |
2220 | sRef tref = uentry_getSref (current); | |
2221 | uentry old = usymtab_lookupAux (env, uentry_rawName (current)); | |
2222 | sRef oref = uentry_getSref (old); | |
2223 | ||
2224 | /* note that is current is in a nested branch, | |
2225 | it may create a "new" old entry. */ | |
2226 | ||
2227 | llassert (uentry_isValid (old)); | |
2228 | uentry_mergeState (old, current, exprNode_loc (expr), | |
2229 | FALSE, FALSE, TRUE, ANDCLAUSE); | |
2230 | ||
2231 | /* | |
2232 | ** if is it defined by the second clause, then it should be defined. | |
2233 | */ | |
2234 | ||
2235 | if (sRef_isAnyDefined (tref) | |
2236 | && (sRef_isAllocated (oref) || sRef_isStateUndefined (oref))) | |
2237 | { | |
2238 | sRef_setDefined (oref, g_currentloc); | |
2239 | } | |
2240 | } | |
2241 | ||
2242 | utab->guards = guardSet_levelUnionFree (utab->guards, | |
2243 | guardSet_invert (exprNode_getGuards (pred)), | |
2244 | utab->lexlevel); | |
2245 | utab->aliases = aliasTable_levelUnion (utab->aliases, otab->aliases, utab->lexlevel); | |
2246 | ||
2247 | usymtab_quietPlainExitScope (); | |
2248 | ||
2249 | } | |
2250 | ||
2251 | /* | |
2252 | ** Stack should be [ US_CBRANCH+ US_SWITCH ] | |
2253 | ** Only branches which do not return (except possibly the last branch) are included. | |
2254 | ** | |
2255 | ** Conditionally merge state from all CBRANCHes. | |
2256 | ** | |
2257 | ** If allpaths is TRUE, then all possible executions go through some switch | |
2258 | ** case, and the original scope is not merged. | |
2259 | */ | |
2260 | ||
2261 | void | |
2262 | usymtab_exitSwitch (/*@unused@*/ exprNode sw, bool allpaths) | |
2263 | /*@modifies utab@*/ | |
2264 | { | |
2265 | usymtab ttab = utab; | |
2266 | usymtab stab = ttab; | |
2267 | usymtab ltab = ttab; | |
2268 | bool lastMustReturn = usymtab_mustEscape (utab); | |
2269 | int i; | |
2270 | ||
2271 | ||
2272 | while (stab->kind == US_CBRANCH) | |
2273 | { | |
2274 | stab = stab->env; | |
2275 | llassert (stab != GLOBAL_ENV); | |
2276 | } | |
2277 | ||
2278 | while (stab->kind == US_NORMAL) | |
2279 | { | |
2280 | stab = stab->env; | |
2281 | llassert (stab != GLOBAL_ENV); | |
2282 | } | |
2283 | ||
2284 | llassert (stab->kind == US_SWITCH); | |
2285 | ||
2286 | /* go to the scope outside the switch (US_SWITCH is just a marker! */ | |
2287 | stab = stab->env; | |
2288 | llassert (stab != GLOBAL_ENV); | |
2289 | ||
2290 | ||
2291 | ttab = ttab->env; | |
2292 | llassert (usymtab_isDefined (ttab)); | |
2293 | ||
2294 | if (ttab->kind == US_CBRANCH) | |
2295 | { | |
2296 | /* was quietPlainExitScope --- but, can't free it yet! */ | |
2297 | utab = utab->env; | |
2298 | llassert (utab != GLOBAL_ENV); | |
2299 | ||
2300 | while (ttab->kind == US_CBRANCH) | |
2301 | { | |
2302 | /* | |
2303 | ** (from popTrueBranch) | |
2304 | */ | |
2305 | ||
2306 | bool mustReturn = usymtab_mustEscape (ttab); | |
2307 | bool mustBreak = usymtab_mustBreak (ttab); | |
2308 | ||
2309 | usymtab_entries (ttab, current) | |
2310 | { | |
2311 | uentry old = /*@-compmempass@*/ usymtab_lookupAux (ltab, uentry_rawName (current)); | |
2312 | /*@=compmempass@*/ | |
2313 | ||
2314 | /* | |
2315 | ** note that is this is in a nested branch, | |
2316 | ** it may create a "new" old entry. | |
2317 | */ | |
2318 | ||
2319 | if (uentry_isValid (old)) | |
2320 | { | |
2321 | if (lastMustReturn) | |
2322 | { | |
2323 | uentry_mergeUses (current, old); | |
2324 | uentry_setState (old, current); | |
2325 | } | |
2326 | else | |
2327 | { | |
2328 | uentry_mergeState (old, current, exprNode_loc (sw), | |
2329 | mustReturn, FALSE, TRUE, SWITCHCLAUSE); | |
2330 | } | |
2331 | } | |
2332 | else | |
2333 | { | |
2334 | ; | |
2335 | } | |
2336 | } end_usymtab_entries; | |
2337 | ||
2338 | /* | |
2339 | ** if entry is not in symbol table for this case, merge with pre-switch | |
2340 | ** table | |
2341 | */ | |
2342 | ||
2343 | if (!mustReturn && !mustBreak) | |
2344 | { | |
2345 | usymtab_entries (stab, current) | |
2346 | { | |
2347 | if (usymtab_getIndex (ttab, uentry_rawName (current)) == NOT_FOUND) | |
2348 | { | |
2349 | uentry old = /*@-compmempass@*/ | |
2350 | usymtab_lookupAux (ltab, uentry_rawName (current)); | |
2351 | /*@=compmempass@*/ | |
2352 | ||
2353 | llassert (uentry_isValid (old)); | |
2354 | uentry_mergeState (old, current, exprNode_loc (sw), | |
2355 | FALSE, FALSE, TRUE, SWITCHCLAUSE); | |
2356 | } | |
2357 | } end_usymtab_entries; | |
2358 | } | |
2359 | ||
2360 | ltab->env = ttab->env; | |
2361 | ttab = ltab->env; | |
2362 | ||
2363 | /* | |
2364 | ** Suprious error, becuase of environments. | |
2365 | */ | |
2366 | ||
2367 | /*@i1@*/ utab = ltab; | |
2368 | ||
2369 | lastMustReturn = FALSE; | |
2370 | /*@-branchstate@*/ | |
2371 | } | |
2372 | } | |
2373 | /*@=branchstate@*/ | |
2374 | ||
2375 | /* | |
2376 | ** now, there is one US_CBRANCH. Merge this with the stab. | |
2377 | */ | |
2378 | ||
2379 | ||
2380 | for (i = 0; i < ltab->nentries; i++) | |
2381 | { | |
2382 | uentry current = ltab->entries[i]; | |
2383 | uentry old = usymtab_lookupAux (stab, uentry_rawName (current)); | |
2384 | ||
2385 | /* note that is this is in a nested branch, | |
2386 | it may create a "new" old entry. */ | |
2387 | ||
2388 | ||
2389 | if (uentry_isValid (old)) | |
2390 | { | |
2391 | if (allpaths) | |
2392 | { | |
2393 | uentry_mergeUses (current, old); | |
2394 | uentry_setState (old, current); | |
2395 | } | |
2396 | else | |
2397 | { | |
2398 | uentry_mergeState (old, current, exprNode_loc (sw), | |
2399 | FALSE, FALSE, TRUE, SWITCHCLAUSE); | |
2400 | } | |
2401 | } | |
2402 | else | |
2403 | { | |
2404 | } | |
2405 | } | |
2406 | ||
2407 | /* | |
2408 | ** exit the switch | |
2409 | */ | |
2410 | ||
2411 | ||
2412 | /* | |
2413 | ** switch may or may not be followed by a new scope | |
2414 | */ | |
2415 | ||
2416 | if (utab->kind == US_SWITCH) | |
2417 | { | |
2418 | usymtab_quietPlainExitScope (); | |
2419 | } | |
2420 | else | |
2421 | { | |
2422 | usymtab_quietPlainExitScope (); | |
2423 | llassert (utab->kind == US_SWITCH); | |
2424 | usymtab_quietPlainExitScope (); | |
2425 | } | |
2426 | ||
2427 | } | |
2428 | ||
2429 | static void | |
2430 | updateNullState (sRef el, /*@notnull@*/ usymtab ttab, | |
2431 | /*@notnull@*/ usymtab ftab, bool trueGuard) | |
2432 | { | |
2433 | sRef base = sRef_getRootBase (el); | |
2434 | int level = sRef_lexLevel (base); | |
2435 | ||
2436 | ||
2437 | ||
2438 | if (sRef_isCvar (base)) | |
2439 | { | |
2440 | usymId index = sRef_getScopeIndex (base); | |
2441 | uentry ue = usymtab_getRefTab (ttab, level, index); | |
2442 | ||
2443 | if (!uentry_isLset (ue)) | |
2444 | { | |
2445 | sRef sr = uentry_getSref (ue); | |
2446 | ||
2447 | if (trueGuard) | |
2448 | { | |
2449 | sRef_setDerivNullState (sr, el, NS_NOTNULL); | |
2450 | } | |
2451 | else | |
2452 | { | |
2453 | if (!guardSet_isGuarded (ttab->guards, el) | |
2454 | && !sRef_isNotNull (sr)) | |
2455 | { | |
2456 | sRef_setDerivNullState (sr, el, NS_DEFNULL); | |
2457 | } | |
2458 | } | |
2459 | } | |
2460 | else | |
2461 | { | |
2462 | } | |
2463 | ||
2464 | ue = usymtab_getRefTab (ftab, level, index); | |
2465 | ||
2466 | if (!uentry_isLset (ue)) | |
2467 | { | |
2468 | sRef sr = uentry_getSref (ue); | |
2469 | ||
2470 | ||
2471 | if (!trueGuard) /* yikes! forgot the ! */ | |
2472 | { | |
2473 | sRef_setDerivNullState (sr, el, NS_NOTNULL); | |
2474 | } | |
2475 | else | |
2476 | { | |
2477 | ||
2478 | if (!guardSet_isGuarded (ftab->guards, el) | |
2479 | && !sRef_isNotNull (sr)) | |
2480 | { | |
2481 | sRef_setDerivNullState (sr, el, NS_DEFNULL); | |
2482 | } | |
2483 | } | |
2484 | } | |
2485 | else | |
2486 | { | |
2487 | } | |
2488 | ||
2489 | } | |
2490 | ||
2491 | } | |
2492 | ||
2493 | void | |
2494 | usymtab_popBranches (exprNode pred, exprNode tbranch, exprNode fbranch, | |
2495 | bool isOpt, clause cl) | |
2496 | /*@modifies utab@*/ | |
2497 | { | |
2498 | int i = 0; | |
2499 | usymtab ftab = utab; | |
2500 | usymtab ttab = utab->env; | |
2501 | ||
2502 | fileloc loc; | |
2503 | usymtab env; | |
2504 | guardSet guards = exprNode_getGuards (pred); | |
2505 | sRefSet tguards = guardSet_getTrueGuards (guards); | |
2506 | sRefSet fguards = guardSet_getFalseGuards (guards); | |
2507 | bool mustReturnT = exprNode_mustEscape (tbranch); | |
2508 | bool mustReturnF = exprNode_mustEscape (fbranch); | |
2509 | ||
2510 | if (exprNode_isDefined (fbranch)) | |
2511 | { | |
2512 | loc = exprNode_loc (fbranch); | |
2513 | } | |
2514 | else | |
2515 | { | |
2516 | loc = exprNode_loc (tbranch); | |
2517 | } | |
2518 | ||
2519 | llassert (usymtab_isDefined (ttab)); | |
2520 | ||
2521 | env = ttab->env; | |
2522 | ||
2523 | llassert (usymtab_isDefined (env)); | |
2524 | llassert (ftab->kind == US_FBRANCH); | |
2525 | llassert (ttab->kind == US_TBRANCH); | |
2526 | ||
2527 | /* | |
2528 | ** For each element that is true guarded (i.e., if (x != NULL)) | |
2529 | ** make x = null in false branch, | |
2530 | ** and x = notnull in true branch. | |
2531 | ** unless x was set locally in that branch. | |
2532 | ** For each element that is false guarded (x == NULL) | |
2533 | ** make x = null in true, notnull in false. | |
2534 | ** | |
2535 | ** For each element that is either guarded (pred(x)) | |
2536 | ** | |
2537 | */ | |
2538 | ||
2539 | sRefSet_allElements (tguards, el) | |
2540 | { | |
2541 | updateNullState (el, ttab, ftab, TRUE); | |
2542 | } end_sRefSet_allElements; | |
2543 | ||
2544 | sRefSet_allElements (fguards, el) | |
2545 | { | |
2546 | updateNullState (el, ttab, ftab, FALSE); | |
2547 | } end_sRefSet_allElements; | |
2548 | ||
2549 | /* | |
2550 | ** | |
2551 | ** if an entry is in both true and false, merge the entries, | |
2552 | ** then replace original with new state. | |
2553 | ** | |
2554 | ** if an entry is in one table, merge it with the original. | |
2555 | */ | |
2556 | ||
2557 | for (i = 0; i < ftab->nentries; i++) | |
2558 | { | |
2559 | uentry fthis = ftab->entries[i]; | |
2560 | uentry old = usymtab_lookupAux (env, uentry_rawName (fthis)); | |
2561 | int tindex = usymtab_getIndex (ttab, uentry_rawName (fthis)); | |
2562 | ||
2563 | if (uentry_isUndefined (old)) | |
2564 | { | |
2565 | /* possible entry was added as an undefined id */ | |
2566 | continue; | |
2567 | } | |
2568 | ||
2569 | if (tindex != NOT_FOUND) | |
2570 | { | |
2571 | uentry tthis = ttab->entries[tindex]; | |
2572 | ||
2573 | /* note that is this is in a nested branch, | |
2574 | it may create a "new" old entry. */ | |
2575 | ||
2576 | if (!mustReturnF) | |
2577 | { | |
2578 | if (!mustReturnT) | |
2579 | { | |
2580 | ||
2581 | uentry_mergeState (fthis, tthis, loc, | |
2582 | mustReturnT, FALSE, FALSE, cl); | |
2583 | } | |
2584 | else | |
2585 | { | |
2586 | uentry_mergeUses (fthis, tthis); | |
2587 | } | |
2588 | ||
2589 | uentry_setState (old, fthis); | |
2590 | ||
2591 | /*@-mustfree@*/ | |
2592 | } | |
2593 | /*@=mustfree@*/ | |
2594 | else | |
2595 | { | |
2596 | uentry_setState (old, tthis); | |
2597 | uentry_mergeState (old, fthis, loc, mustReturnF, | |
2598 | TRUE, FALSE, cl); | |
2599 | } | |
2600 | ||
2601 | ttab->entries[tindex] = uentry_undefined; | |
2602 | uentry_free (tthis); | |
2603 | } | |
2604 | else | |
2605 | { | |
2606 | uentry_mergeState (old, fthis, loc, mustReturnF, TRUE, FALSE, cl); | |
2607 | } | |
2608 | } | |
2609 | ||
2610 | for (i = 0; i < ttab->nentries; i++) | |
2611 | { | |
2612 | uentry current = ttab->entries[i]; | |
2613 | ||
2614 | if (!uentry_isUndefined (current)) | |
2615 | { | |
2616 | uentry old = usymtab_lookupAux (env, uentry_rawName (current)); | |
2617 | ||
2618 | llassertprint (!uentry_isUndefined (old), ("name: <%s>", | |
2619 | uentry_rawName (current))); | |
2620 | if (mustReturnF) | |
2621 | { | |
2622 | uentry_mergeUses (current, old); | |
2623 | uentry_setState (old, current); | |
2624 | } | |
2625 | else | |
2626 | { | |
2627 | /* | |
2628 | ** assumes false branch is a fall-through if | |
2629 | ** fbranch is not defined. This is true, unless | |
2630 | ** where was some greivous error in processing | |
2631 | ** the else branch of an if-then, in which case | |
2632 | ** this is probably the right thing to do anyway. | |
2633 | */ | |
2634 | ||
2635 | uentry_mergeState (old, current, loc, mustReturnT, | |
2636 | FALSE, isOpt, cl); | |
2637 | } | |
2638 | } | |
2639 | } | |
2640 | ||
2641 | ||
2642 | /* | |
2643 | ** Plain levelUnion doesn't work, since we need to use the sRef's in env->aliases | |
2644 | ** if they are present. | |
2645 | */ | |
2646 | ||
2647 | llassert (NOALIAS (env->aliases, ttab->aliases)); | |
2648 | llassert (NOALIAS (env->aliases, ftab->aliases)); | |
2649 | ||
2650 | aliasTable_free (env->aliases); | |
2651 | ||
2652 | env->aliases = aliasTable_levelUnionNew (ttab->aliases, | |
2653 | ftab->aliases, env->lexlevel); | |
2654 | ||
2655 | aliasTable_fixSrefs (env->aliases); | |
2656 | ||
2657 | /* exit true and false scopes */ | |
2658 | usymtab_quietPlainExitScope (); | |
2659 | usymtab_quietPlainExitScope (); | |
2660 | ||
2661 | if (mustReturnT) | |
2662 | { | |
2663 | utab->guards = guardSet_levelUnionFree | |
2664 | (utab->guards, | |
2665 | guardSet_invert (exprNode_getGuards (pred)), | |
2666 | utab->lexlevel); | |
2667 | } | |
2668 | ||
2669 | if (mustReturnF) | |
2670 | { | |
2671 | utab->guards = guardSet_levelUnion (utab->guards, | |
2672 | exprNode_getGuards (pred), | |
2673 | utab->lexlevel); | |
2674 | } | |
2675 | ||
2676 | DPRINTF (("Here.")); | |
2677 | } | |
2678 | ||
2679 | static void usymtab_fixCases (void) /*@modifies utab@*/ { | |
2680 | while (utab->kind == US_CBRANCH) | |
2681 | { | |
2682 | usymtab_quietPlainExitScope (); | |
2683 | } | |
2684 | ||
2685 | llassert (utab->kind != US_CBRANCH); | |
2686 | } | |
2687 | ||
2688 | void | |
2689 | usymtab_altBranch (/*@only@*/ guardSet guards) | |
2690 | /*@modifies utab@*/ | |
2691 | { | |
2692 | usymtab t = usymtab_create (US_FBRANCH, utab, FALSE); | |
2693 | usymtab parent = utab->env; | |
2694 | ||
2695 | /* | |
2696 | ** If we are in a case, need to close it. The C syntax | |
2697 | ** is very liberal, so this kludge is necessary. | |
2698 | */ | |
2699 | ||
2700 | usymtab_fixCases (); | |
2701 | ||
2702 | DPRINTF (("Current kind: %s", usymtab_unparseStack ())); | |
2703 | llassert (utab->kind == US_TBRANCH); | |
2704 | llassert (parent != GLOBAL_ENV); | |
2705 | ||
2706 | guardSet_free (t->guards); | |
2707 | t->guards = guards; | |
2708 | ||
2709 | aliasTable_free (t->aliases); | |
2710 | t->aliases = aliasTable_copy (parent->aliases); | |
2711 | ||
2712 | utab = t; | |
2713 | } | |
2714 | ||
2715 | void | |
2716 | usymtab_allDefined (void) | |
2717 | /*@globals utab, globtab@*/ | |
2718 | { | |
2719 | int i; | |
2720 | ||
2721 | llassert (utab == globtab); | |
2722 | ||
2723 | for (i = 0; i < utab->nentries; i++) | |
2724 | { | |
2725 | uentry e = utab->entries[i]; | |
2726 | ||
2727 | if (uentry_isPriv (e)) | |
2728 | { | |
2729 | ; /* no need to define it */ | |
2730 | } | |
2731 | else | |
2732 | { | |
2733 | if (context_getFlag (FLG_SPECUNDECL)) | |
2734 | { | |
2735 | fileloc sloc = uentry_whereSpecified (e); | |
2736 | fileloc dloc = uentry_whereDeclared (e); | |
2737 | ||
2738 | if (fileloc_isDefined (sloc) | |
2739 | && !uentry_isFakeTag (e) | |
2740 | && !fileloc_isDefined (dloc)) | |
2741 | { | |
2742 | voptgenerror | |
2743 | (FLG_SPECUNDECL, | |
2744 | message ("%s %q specified but not declared", | |
2745 | ekind_capName (uentry_getKind (e)), | |
2746 | uentry_getName (e)), | |
2747 | sloc); | |
2748 | } | |
2749 | } | |
2750 | ||
2751 | if (!uentry_isCodeDefined (e)) | |
2752 | { | |
2753 | fileloc dloc = uentry_whereDeclared (e); | |
2754 | ||
2755 | if (fileloc_isLib (dloc)) | |
2756 | { | |
2757 | ; | |
2758 | } | |
2759 | else if (fileloc_isDefined (dloc)) | |
2760 | { | |
2761 | if (!uentry_isAnyTag (e)) | |
2762 | { | |
2763 | if (fileloc_isUser (dloc)) | |
2764 | { | |
2765 | voptgenerror | |
2766 | (FLG_DECLUNDEF, | |
2767 | message ("%s %q declared but not defined", | |
2768 | ekind_capName (uentry_getKind (e)), | |
2769 | uentry_getName (e)), | |
2770 | dloc); | |
2771 | } | |
2772 | } | |
2773 | } | |
2774 | else | |
2775 | { | |
2776 | fileloc sloc = uentry_whereSpecified (e); | |
2777 | ||
2778 | if (fileloc_isDefined (sloc) | |
2779 | && !fileloc_isImport (sloc) | |
2780 | && !fileloc_isLib (sloc) | |
2781 | && !fileloc_isPreproc (sloc) | |
2782 | && !uentry_isFakeTag (e)) | |
2783 | { | |
2784 | if (uentry_isVariable (e) || uentry_isFunction (e)) | |
2785 | { | |
2786 | voptgenerror | |
2787 | (FLG_SPECUNDEF, | |
2788 | message ("%s %q specified but not declared or defined", | |
2789 | ekind_capName (uentry_getKind (e)), | |
2790 | uentry_getName (e)), | |
2791 | sloc); | |
2792 | } | |
2793 | else | |
2794 | { | |
2795 | voptgenerror | |
2796 | (FLG_SPECUNDEF, | |
2797 | message ("%s %q specified but not defined", | |
2798 | ekind_capName (uentry_getKind (e)), | |
2799 | uentry_getName (e)), | |
2800 | sloc); | |
2801 | } | |
2802 | } | |
2803 | } | |
2804 | } | |
2805 | } | |
2806 | } | |
2807 | } | |
2808 | ||
2809 | void usymtab_exportHeader (void) | |
2810 | /*@globals utab@*/ | |
2811 | { | |
2812 | int i; | |
2813 | ||
2814 | for (i = 0; i < utab->nentries; i++) | |
2815 | { | |
2816 | uentry ce = utab->entries[i]; | |
2817 | ||
2818 | if (!uentry_isDatatype (ce) | |
2819 | && !uentry_isAnyTag (ce) | |
2820 | && !uentry_isEitherConstant (ce) && !uentry_isStatic (ce) | |
2821 | && !uentry_isExternal (ce) | |
2822 | && !uentry_isForward (ce)) | |
2823 | { | |
2824 | fileloc fwhere = uentry_whereDeclared (ce); | |
2825 | ||
2826 | if (fileloc_isUndefined (fwhere) | |
2827 | && uentry_isFunction (ce)) | |
2828 | { | |
2829 | fwhere = uentry_whereDefined (ce); | |
2830 | } | |
2831 | ||
2832 | if (fileloc_isDefined (fwhere) | |
2833 | && !fileloc_isHeader (fwhere) | |
2834 | && !(fileloc_isSpecialFile (fwhere) | |
2835 | && !context_getFlag (FLG_UNUSEDSPECIAL))) | |
2836 | { | |
2837 | if (uentry_isVariable (ce)) | |
2838 | { | |
2839 | if (optgenerror | |
2840 | (FLG_EXPORTHEADERVAR, | |
2841 | message ("%s %q exported but not declared in header file", | |
2842 | ekind_capName (uentry_getKind (ce)), | |
2843 | uentry_getName (ce)), | |
2844 | fwhere)) | |
2845 | { | |
2846 | uentry_showDefSpecInfo (ce, fwhere); | |
2847 | } | |
2848 | } | |
2849 | else | |
2850 | { | |
2851 | if (!uentry_isIter (ce) | |
2852 | && !uentry_isEndIter (ce) | |
2853 | && !uentry_isExpandedMacro (ce)) | |
2854 | { | |
2855 | if (uentry_isFunction (ce) | |
2856 | && cstring_equalLit (uentry_rawName (ce), "main")) | |
2857 | { | |
2858 | ; /* no error for main */ | |
2859 | } | |
2860 | else | |
2861 | { | |
2862 | if (optgenerror | |
2863 | (FLG_EXPORTHEADER, | |
2864 | message ("%s %q exported but not declared " | |
2865 | "in header file", | |
2866 | ekind_capName (uentry_getKind (ce)), | |
2867 | uentry_getName (ce)), | |
2868 | fwhere)) | |
2869 | { | |
2870 | uentry_showDefSpecInfo (ce, fwhere); | |
2871 | } | |
2872 | } | |
2873 | } | |
2874 | } | |
2875 | } | |
2876 | } | |
2877 | } | |
2878 | } | |
2879 | ||
2880 | void usymtab_exportLocal (void) | |
2881 | /*@globals utab@*/ | |
2882 | { | |
2883 | int i; | |
2884 | ||
2885 | ||
2886 | for (i = 0; i < utab->nentries; i++) | |
2887 | { | |
2888 | uentry ce = utab->entries[i]; | |
2889 | ||
2890 | ||
2891 | if (!uentry_isDatatype (ce) && !uentry_isAnyTag (ce) | |
2892 | && !uentry_isEitherConstant (ce) | |
2893 | && !uentry_isIter (ce) | |
2894 | && !uentry_isEndIter (ce) | |
2895 | && !uentry_isExpandedMacro (ce) | |
2896 | && uentry_isUsed (ce)) | |
2897 | { | |
2898 | /* check static uses */ | |
2899 | filelocList fuses = uentry_getUses (ce); | |
2900 | fileloc mod = uentry_whereDefined (ce); | |
2901 | bool ok = filelocList_isEmpty (fuses); | |
2902 | fileloc fwhere = uentry_whereDeclared (ce); | |
2903 | ||
2904 | if (fileloc_isSpecialFile (fwhere) | |
2905 | && !context_getFlag (FLG_UNUSEDSPECIAL)) | |
2906 | { | |
2907 | ok = TRUE; /* no errors for special files */ | |
2908 | } | |
2909 | else | |
2910 | { | |
2911 | filelocList_elements (fuses, uloc) | |
2912 | { | |
2913 | if (fileloc_isUndefined (uloc) || !fileloc_sameModule (uloc, mod)) | |
2914 | { | |
2915 | ok = TRUE; | |
2916 | /*@innerbreak@*/ break; | |
2917 | } | |
2918 | } end_filelocList_elements; | |
2919 | } | |
2920 | ||
2921 | if (!ok) | |
2922 | { | |
2923 | if (optgenerror | |
2924 | (FLG_EXPORTLOCAL, | |
2925 | message ("%s exported but not used outside %s: %q", | |
2926 | ekind_capName (uentry_getKind (ce)), | |
2927 | fileloc_getBase (mod), | |
2928 | uentry_getName (ce)), | |
2929 | fwhere)) | |
2930 | { | |
2931 | uentry_showDefSpecInfo (ce, fwhere); | |
2932 | } | |
2933 | } | |
2934 | } | |
2935 | } | |
2936 | } | |
2937 | ||
2938 | void | |
2939 | usymtab_allUsed (void) | |
2940 | /*@globals utab@*/ | |
2941 | { | |
2942 | int i; | |
2943 | bool isFileStatic = usymtab_inFileScope (); | |
2944 | cstring last_file = cstring_undefined; | |
2945 | ||
2946 | for (i = 0; i < utab->nentries; i++) | |
2947 | { | |
2948 | bool hasError = FALSE; | |
2949 | uentry ce = utab->entries[i]; | |
2950 | fileloc fwhere = uentry_whereDeclared (ce); | |
2951 | ||
2952 | if (fileloc_isUndefined (fwhere)) | |
2953 | { | |
2954 | fwhere = uentry_whereDefined (ce); | |
2955 | } | |
2956 | ||
2957 | if (fileloc_isInvalid (fwhere) | |
2958 | || fileloc_isLib (fwhere) | |
2959 | || fileloc_isBuiltin (fwhere) | |
2960 | || ((fileloc_isSpecialFile (fwhere) | |
2961 | || fileloc_isSpecialFile (uentry_whereDefined (ce))) | |
2962 | && !context_getFlag (FLG_UNUSEDSPECIAL))) | |
2963 | { | |
2964 | ; | |
2965 | } | |
2966 | else if (!uentry_wasUsed (ce) && !uentry_isAnyTag (ce)) | |
2967 | { | |
2968 | cstring fname = fileloc_filename (fwhere); | |
2969 | ||
2970 | if (cstring_isUndefined (last_file)) | |
2971 | { | |
2972 | last_file = fname; | |
2973 | } | |
2974 | else if (cstring_equal (fname, last_file)) | |
2975 | { | |
2976 | } | |
2977 | else | |
2978 | { | |
2979 | cleanupMessages (); | |
2980 | last_file = fname; | |
2981 | } | |
2982 | ||
2983 | if (uentry_isParam (ce)) | |
2984 | { | |
2985 | if (context_inMacro ()) | |
2986 | { | |
2987 | sRef cref = uentry_getSref (ce); | |
2988 | ||
2989 | if (uentry_isYield (ce)) | |
2990 | { | |
2991 | ; /* no checks (for now) */ | |
2992 | } | |
2993 | else if (sRef_isSafe (cref)) | |
2994 | { | |
2995 | ; /* no error */ | |
2996 | } | |
2997 | else | |
2998 | { | |
2999 | if (uentry_hasRealName (ce)) | |
3000 | { | |
3001 | hasError = | |
3002 | optgenerror (FLG_MACROPARAMS, | |
3003 | message ("Macro parameter %q not used", | |
3004 | uentry_getName (ce)), | |
3005 | fwhere); | |
3006 | } | |
3007 | } | |
3008 | } | |
3009 | else | |
3010 | { | |
3011 | if (cstring_equalFree (uentry_getName (ce), | |
3012 | cstring_makeLiteral ("..."))) | |
3013 | { | |
3014 | ; | |
3015 | } | |
3016 | else | |
3017 | { | |
3018 | hasError = optgenerror (FLG_PARAMUNUSED, | |
3019 | message ("Parameter %q not used", | |
3020 | uentry_getName (ce)), | |
3021 | fwhere); | |
3022 | } | |
3023 | } | |
3024 | } /* isParam */ | |
3025 | else if (uentry_isFunction (ce) || uentry_isIter (ce)) | |
3026 | { | |
3027 | if (fileloc_isUser (fwhere)) | |
3028 | { | |
3029 | hasError = optgenerror | |
3030 | (FLG_FUNCUNUSED, | |
3031 | message ("%q %q declared but not used", | |
3032 | cstring_makeLiteral | |
3033 | (uentry_isIter (ce) ? "Iterator" | |
3034 | : (isFileStatic ? "File static function" : "Function")), | |
3035 | uentry_getName (ce)), | |
3036 | fwhere); | |
3037 | } | |
3038 | } | |
3039 | else if (uentry_isEndIter (ce)) | |
3040 | { | |
3041 | ; /* no error (already reported for iter */ | |
3042 | } | |
3043 | else if (uentry_isEnumConstant (ce)) | |
3044 | { | |
3045 | if (fileloc_isUser (fwhere)) | |
3046 | { | |
3047 | hasError = optgenerror | |
3048 | (FLG_ENUMMEMUNUSED, | |
3049 | message ("Enum member %q not used", | |
3050 | uentry_getName (ce)), | |
3051 | fwhere); | |
3052 | } | |
3053 | } | |
3054 | else if (uentry_isConstant (ce)) | |
3055 | { | |
3056 | if (fileloc_isUser (fwhere)) | |
3057 | { | |
3058 | hasError = optgenerror | |
3059 | (FLG_CONSTUNUSED, | |
3060 | message ("Constant %q declared but not used", | |
3061 | uentry_getName (ce)), | |
3062 | fwhere); | |
3063 | } | |
3064 | } | |
3065 | else if (uentry_isDatatype (ce)) | |
3066 | { | |
3067 | if (fileloc_isUser (fwhere)) | |
3068 | { | |
3069 | hasError = optgenerror | |
3070 | (FLG_TYPEUNUSED, | |
3071 | message ("Type %q declared but not used", | |
3072 | uentry_getName (ce)), | |
3073 | fwhere); | |
3074 | } | |
3075 | } | |
3076 | else if (!uentry_isRefParam (ce) && !uentry_isExpandedMacro (ce)) | |
3077 | { /* errors for ref params will be reported in the next scope */ | |
3078 | llassertprint (uentry_isVar (ce), | |
3079 | ("ce: %s", uentry_unparseFull (ce))); | |
3080 | ||
3081 | if (ctype_isFunction (uentry_getType (ce))) | |
3082 | { | |
3083 | if (fileloc_isUser (fwhere)) | |
3084 | { | |
3085 | hasError = optgenerror | |
3086 | (FLG_FUNCUNUSED, | |
3087 | message ("%q %q declared but not used", | |
3088 | cstring_makeLiteral | |
3089 | (isFileStatic ? "File static function" | |
3090 | : "Function"), | |
3091 | uentry_getName (ce)), | |
3092 | fwhere); | |
3093 | } | |
3094 | } | |
3095 | else | |
3096 | { | |
3097 | if (fileloc_isUser (fwhere)) | |
3098 | { | |
3099 | ||
3100 | ||
3101 | hasError = optgenerror | |
3102 | (FLG_VARUNUSED, | |
3103 | message ("%q %q declared but not used", | |
3104 | cstring_makeLiteral | |
3105 | (isFileStatic ? "File static variable" | |
3106 | : "Variable"), | |
3107 | uentry_getName (ce)), | |
3108 | fwhere); | |
3109 | } | |
3110 | } | |
3111 | } | |
3112 | else | |
3113 | { | |
3114 | ; /* no errors */ | |
3115 | } | |
3116 | } /* unused */ | |
3117 | else if (uentry_isDatatype (ce) || uentry_isAnyTag (ce)) | |
3118 | { /* check all fields */ | |
3119 | ctype ct = uentry_getRealType (ce); | |
3120 | ||
3121 | ||
3122 | while (ctype_isAP (ct)) | |
3123 | { | |
3124 | ct = ctype_getBaseType (ct); | |
3125 | } | |
3126 | ||
3127 | ||
3128 | if (ctype_isSU (ct)) | |
3129 | { | |
3130 | uentryList fields = ctype_getFields (ct); | |
3131 | ||
3132 | uentryList_elements (fields, field) | |
3133 | { | |
3134 | if (!uentry_isUsed (field)) | |
3135 | { | |
3136 | if (uentry_hasName (ce)) | |
3137 | { | |
3138 | hasError |= optgenerror | |
3139 | (FLG_FIELDUNUSED, | |
3140 | message ("Field %q of %s %q declared but not used", | |
3141 | uentry_getName (field), | |
3142 | cstring_makeLiteralTemp | |
3143 | (ctype_isStruct (ct) ? "structure" : "union"), | |
3144 | uentry_getName (ce)), | |
3145 | uentry_whereEarliest (field)); | |
3146 | } | |
3147 | else | |
3148 | { | |
3149 | hasError |= optgenerror | |
3150 | (FLG_FIELDUNUSED, | |
3151 | message ("Field %q of unnamed %s declared but not used", | |
3152 | uentry_getName (field), | |
3153 | cstring_makeLiteralTemp | |
3154 | (ctype_isStruct (ct) ? "structure" : "union")), | |
3155 | uentry_whereEarliest (field)); | |
3156 | } | |
3157 | ||
3158 | uentry_setUsed (field, fileloc_undefined); | |
3159 | } | |
3160 | } end_uentryList_elements; | |
3161 | } | |
3162 | } | |
3163 | else | |
3164 | { | |
3165 | ; /* no errors */ | |
3166 | } | |
3167 | ||
3168 | if (hasError) | |
3169 | { | |
3170 | if (uentry_isParam (ce) && context_inMacro ()) | |
3171 | { | |
3172 | if (fileloc_isDefined (uentry_whereSpecified (ce))) | |
3173 | { | |
3174 | uentry_showWhereSpecified (ce); | |
3175 | } | |
3176 | } | |
3177 | else | |
3178 | { | |
3179 | uentry_showDefSpecInfo (ce, fwhere); | |
3180 | } | |
3181 | ||
3182 | uentry_setUsed (ce, fileloc_undefined); | |
3183 | } | |
3184 | } | |
3185 | } | |
3186 | ||
3187 | static void | |
3188 | checkGlobalReturn (uentry glob, sRef orig) | |
3189 | { | |
3190 | sRef sr = uentry_getSref (glob); | |
3191 | ||
3192 | ||
3193 | if (context_getFlag (FLG_GLOBSTATE)) | |
3194 | { | |
3195 | if (sRef_isKilledGlob (orig)) | |
3196 | { | |
3197 | if (sRef_isStateUndefined (sr) | |
3198 | || sRef_isUnuseable (sr) | |
3199 | || sRef_isStateUnknown (sr) | |
3200 | || sRef_isDead (sr)) | |
3201 | { | |
3202 | ; | |
3203 | } | |
3204 | else | |
3205 | { | |
3206 | ctype ct = ctype_realType (uentry_getType (glob)); | |
3207 | ||
3208 | if (ctype_isVisiblySharable (ct)) | |
3209 | { | |
3210 | if (optgenerror | |
3211 | (FLG_GLOBSTATE, | |
3212 | message | |
3213 | ("Killed global %q not released before return", | |
3214 | uentry_getName (glob)), | |
3215 | g_currentloc)) | |
3216 | { | |
3217 | sRef_showStateInfo (sr); | |
3218 | } | |
3219 | } | |
3220 | else | |
3221 | { | |
3222 | sRef_protectDerivs (); | |
3223 | (void) checkGlobalDestroyed (sr, g_currentloc); | |
3224 | sRef_clearProtectDerivs (); | |
3225 | } | |
3226 | } | |
3227 | } | |
3228 | else | |
3229 | { | |
3230 | if (sRef_isStateUndefined (sr)) | |
3231 | { | |
3232 | if (optgenerror (FLG_GLOBSTATE, | |
3233 | message | |
3234 | ("Function returns with global %q undefined", | |
3235 | uentry_getName (glob)), | |
3236 | g_currentloc)) | |
3237 | { | |
3238 | sRef_showStateInfo (sr); | |
3239 | } | |
3240 | } | |
3241 | else | |
3242 | { | |
3243 | if (sRef_isDead (sr)) | |
3244 | { | |
3245 | if (optgenerror | |
3246 | (FLG_GLOBSTATE, | |
3247 | message ("Function returns with global %q " | |
3248 | "referencing released storage", | |
3249 | uentry_getName (glob)), | |
3250 | g_currentloc)) | |
3251 | { | |
3252 | sRef_showStateInfo (sr); | |
3253 | sRef_setDefState (sr, SS_UNKNOWN, fileloc_undefined); | |
3254 | } | |
3255 | } | |
3256 | ||
3257 | if (ctype_isRealPointer (uentry_getType (glob)) && | |
3258 | sRef_possiblyNull (sr) && !uentry_possiblyNull (glob)) | |
3259 | { | |
3260 | if (optgenerror | |
3261 | (FLG_GLOBSTATE, | |
3262 | message ("Function returns with non-null global %q " | |
3263 | "referencing null storage", | |
3264 | uentry_getName (glob)), | |
3265 | g_currentloc)) | |
3266 | { | |
3267 | sRef_showNullInfo (sr); | |
3268 | } | |
3269 | } | |
3270 | else | |
3271 | { | |
3272 | checkGlobReturn (glob); | |
3273 | } | |
3274 | } | |
3275 | } | |
3276 | } | |
3277 | } | |
3278 | ||
3279 | /* | |
3280 | ** remember: check alias globals | |
3281 | */ | |
3282 | ||
3283 | void usymtab_checkFinalScope (bool isReturn) | |
3284 | /*@globals utab@*/ | |
3285 | { | |
3286 | bool mustFree = context_getFlag (FLG_MUSTFREE); | |
3287 | bool mustDefine = context_getFlag (FLG_MUSTDEFINE); | |
3288 | /* bool mustNotAlias = context_getFlag (FLG_MUSTNOTALIAS); */ | |
3289 | sRefSet checked = sRefSet_new (); | |
3290 | usymtab stab = utab; | |
3291 | int i; | |
3292 | ||
3293 | /* | |
3294 | ** need to check all scopes out to function parameters. | |
3295 | */ | |
3296 | ||
3297 | do | |
3298 | { | |
3299 | for (i = 0; i < stab->nentries; i++) | |
3300 | { | |
3301 | uentry ce = stab->entries[i]; | |
3302 | sRef sr = uentry_getSref (ce); | |
3303 | sRef rb = sRef_getRootBase (sr); | |
3304 | ||
3305 | if (ctype_isFunction (uentry_getType (ce))) | |
3306 | { | |
3307 | /*@innercontinue@*/ continue; | |
3308 | } | |
3309 | ||
3310 | if (mustFree) | |
3311 | { | |
3312 | DPRINTF (("Check entry: %s", uentry_unparseFull (ce))); | |
3313 | ||
3314 | if (!sRefSet_member (checked, sr) && !sRef_isGlobal (rb)) | |
3315 | { | |
3316 | if (ctype_isRealSU (uentry_getType (ce)) | |
3317 | && !uentry_isAnyParam (ce) | |
3318 | && !uentry_isRefParam (ce) | |
3319 | && !uentry_isStatic (ce) | |
3320 | && !sRef_isDependent (sr) | |
3321 | && !sRef_isOwned (sr)) | |
3322 | { | |
3323 | sRefSet als = usymtab_allAliases (sr); | |
3324 | ||
3325 | ||
3326 | if (sRefSet_isEmpty (als)) | |
3327 | { | |
3328 | checkLocalDestroyed (sr, g_currentloc); | |
3329 | } | |
3330 | else | |
3331 | { | |
3332 | /* aliased, no problem */ ; | |
3333 | } | |
3334 | ||
3335 | sRefSet_free (als); | |
3336 | } | |
3337 | else if | |
3338 | (!uentry_isStatic (ce) | |
3339 | && ((sRef_isNewRef (sr)) | |
3340 | || (((sRef_isOnly (sr) || sRef_isFresh (sr) | |
3341 | || sRef_isKeep (sr) || sRef_isOwned (sr)) | |
3342 | && !sRef_isDead (sr)) | |
3343 | && (!sRef_definitelyNull (sr)) | |
3344 | && (!usymtab_isProbableNull (sr))))) | |
3345 | { | |
3346 | bool hasError = TRUE; | |
3347 | ||
3348 | /* | |
3349 | ** If its a scope exit, check if there is an alias. | |
3350 | ** If so, make it only. If not, there is an error. | |
3351 | */ | |
3352 | ||
3353 | if (!isReturn) | |
3354 | { | |
3355 | if (canLoseReference (sr, g_currentloc)) | |
3356 | { | |
3357 | hasError = FALSE; | |
3358 | } | |
3359 | } | |
3360 | ||
3361 | if (hasError) | |
3362 | { | |
3363 | if (sRef_hasLastReference (sr)) | |
3364 | { | |
3365 | sRef ar = sRef_getAliasInfoRef (sr); | |
3366 | ||
3367 | if (optgenerror | |
3368 | (FLG_MUSTFREE, | |
3369 | message | |
3370 | ("Last reference %q to %s storage %qnot %q before %q", | |
3371 | sRef_unparse (sr), | |
3372 | alkind_unparse (sRef_getAliasKind (sr)), | |
3373 | sRef_unparseOpt (ar), | |
3374 | cstring_makeLiteral (sRef_isKeep (sr) | |
3375 | ? "transferred" : "released"), | |
3376 | cstring_makeLiteral (isReturn | |
3377 | ? "return" : "scope exit")), | |
3378 | g_currentloc)) | |
3379 | { | |
3380 | sRef_showRefLost (sr); | |
3381 | } | |
3382 | } | |
3383 | else if (sRef_isNewRef (sr)) | |
3384 | { | |
3385 | if (optgenerror | |
3386 | (FLG_MUSTFREE, | |
3387 | message | |
3388 | ("%q %q not released before %q", | |
3389 | cstring_makeLiteral | |
3390 | (alkind_isKillRef (sRef_getOrigAliasKind (sr)) | |
3391 | ? "Kill reference parameter" : "New reference"), | |
3392 | uentry_getName (ce), | |
3393 | cstring_makeLiteral (isReturn | |
3394 | ? "return" : "scope exit")), | |
3395 | g_currentloc)) | |
3396 | { | |
3397 | sRef_showAliasInfo (sr); | |
3398 | } | |
3399 | } | |
3400 | else | |
3401 | { | |
3402 | if (ctype_isRealSU (sRef_getType (sr))) | |
3403 | { | |
3404 | checkStructDestroyed (sr, g_currentloc); | |
3405 | } | |
3406 | else | |
3407 | { | |
3408 | if (optgenerror | |
3409 | (FLG_MUSTFREE, | |
3410 | message | |
3411 | ("%s storage %q not %q before %q", | |
3412 | alkind_capName (sRef_getAliasKind (sr)), | |
3413 | uentry_getName (ce), | |
3414 | cstring_makeLiteral (sRef_isKeep (sr) | |
3415 | ? "transferred" : "released"), | |
3416 | cstring_makeLiteral (isReturn | |
3417 | ? "return" : "scope exit")), | |
3418 | g_currentloc)) | |
3419 | { | |
3420 | sRef_showAliasInfo (sr); | |
3421 | } | |
3422 | } | |
3423 | } | |
3424 | } | |
3425 | } | |
3426 | else | |
3427 | { | |
3428 | ; | |
3429 | } | |
3430 | } | |
3431 | else if (mustDefine && uentry_isOut (ce)) | |
3432 | { | |
3433 | if (!ynm_toBoolStrict (sRef_isReadable (sr))) | |
3434 | { | |
3435 | voptgenerror | |
3436 | (FLG_MUSTDEFINE, | |
3437 | message ("Out storage %q not defined before %q", | |
3438 | uentry_getName (ce), | |
3439 | cstring_makeLiteral | |
3440 | (isReturn ? "return" : "scope exit")), | |
3441 | g_currentloc); | |
3442 | ||
3443 | /* uentry_showWhereDeclared (ce); */ | |
3444 | } | |
3445 | } | |
3446 | else | |
3447 | { | |
3448 | ; | |
3449 | } | |
3450 | ||
3451 | /* | |
3452 | ** also check state is okay | |
3453 | */ | |
3454 | ||
3455 | if (usymtab_lexicalLevel () > functionScope | |
3456 | && uentry_isVariable (ce) | |
3457 | && (sRef_isLocalVar (sr) | |
3458 | && (sRef_isDependent (sr) || sRef_isLocalState (sr)))) | |
3459 | { | |
3460 | sRefSet ab = usymtab_aliasedBy (sr); | |
3461 | ||
3462 | /* should do something more efficient here */ | |
3463 | ||
3464 | if (sRefSet_isEmpty (ab)) | |
3465 | { | |
3466 | /* and no local ref */ | |
3467 | checkLoseRef (ce); | |
3468 | } | |
3469 | else | |
3470 | { | |
3471 | ; | |
3472 | } | |
3473 | ||
3474 | sRefSet_free (ab); | |
3475 | } | |
3476 | else | |
3477 | { | |
3478 | ; | |
3479 | } | |
3480 | ||
3481 | checked = sRefSet_insert (checked, sr); | |
3482 | } | |
3483 | } | |
3484 | llassert (usymtab_isDefined (stab->env)); | |
3485 | ||
3486 | if (usymtab_isBranch (stab)) | |
3487 | { | |
3488 | stab = usymtab_dropEnv (stab); | |
3489 | } | |
3490 | else | |
3491 | { | |
3492 | stab = stab->env; | |
3493 | } | |
3494 | ||
3495 | llassert (stab != usymtab_undefined); | |
3496 | } while (isReturn && (stab->lexlevel >= paramsScope)); | |
3497 | ||
3498 | sRefSet_free (checked); | |
3499 | ||
3500 | /* | |
3501 | ** for returns: | |
3502 | ** all globals are appropriately defined | |
3503 | ** all parameters are appropriately defined | |
3504 | ** special clauses are followed | |
3505 | */ | |
3506 | ||
3507 | if (isReturn || (utab->lexlevel == paramsScope)) | |
3508 | { | |
3509 | uentry fcn = context_getHeader (); | |
3510 | uentryList params = context_getParams (); | |
3511 | globSet uglobs = context_getUsedGlobs (); | |
3512 | globSet sglobs = context_getGlobs (); | |
3513 | ||
3514 | ||
3515 | if (isReturn && context_maybeSet (FLG_GLOBALIAS)) | |
3516 | { | |
3517 | aliasTable_checkGlobs (utab->aliases); | |
3518 | } | |
3519 | ||
3520 | /* | |
3521 | ** special clauses (defines, sets, allocates, releases) | |
3522 | */ | |
3523 | ||
3524 | if (uentry_hasSpecialClauses (fcn)) | |
3525 | { | |
3526 | specialClauses clauses = uentry_getSpecialClauses (fcn); | |
3527 | ||
3528 | specialClauses_elements (clauses, cl) | |
3529 | { | |
3530 | if (specialClause_isAfter (cl)) | |
3531 | { /* evs - 2000 07 10 - added this */ | |
3532 | sRefTest tst = specialClause_getPostTestFunction (cl); | |
3533 | sRefSet rfs = specialClause_getRefs (cl); | |
3534 | ||
3535 | sRefSet_elements (rfs, el) | |
3536 | { | |
3537 | sRef base = sRef_getRootBase (el); | |
3538 | ||
3539 | if (sRef_isResult (base)) | |
3540 | { | |
3541 | ; | |
3542 | } | |
3543 | else if (sRef_isParam (base)) | |
3544 | { | |
3545 | sRef sr = sRef_updateSref (base); | |
3546 | sr = sRef_fixBase (el, sr); | |
3547 | ||
3548 | if (tst != NULL && !tst (sr)) | |
3549 | { | |
3550 | if (optgenerror | |
3551 | (specialClause_postErrorCode (cl), | |
3552 | message ("%s storage %qcorresponds to " | |
3553 | "storage listed in %q clause", | |
3554 | specialClause_postErrorString (cl, sr), | |
3555 | sRef_unparseOpt (sr), | |
3556 | specialClause_unparseKind (cl)), | |
3557 | g_currentloc)) | |
3558 | { | |
3559 | sRefShower ss = specialClause_getPostTestShower (cl); | |
3560 | ||
3561 | if (ss != NULL) | |
3562 | { | |
3563 | ss (sr); | |
3564 | } | |
3565 | } | |
3566 | } | |
3567 | } | |
3568 | else | |
3569 | { | |
3570 | if (sRef_isMeaningful (el)) | |
3571 | { | |
3572 | BADBRANCH; | |
3573 | } | |
3574 | } | |
3575 | } end_sRefSet_elements ; | |
3576 | } | |
3577 | } end_specialClauses_elements ; | |
3578 | } | |
3579 | ||
3580 | /* | |
3581 | ** check parameters on return | |
3582 | */ | |
3583 | ||
3584 | uentryList_elements (params, arg) | |
3585 | { | |
3586 | if (!uentry_isElipsisMarker (arg)) | |
3587 | { | |
3588 | ctype rt = ctype_realType (uentry_getType (arg)); | |
3589 | ||
3590 | if (ctype_isMutable (rt) || ctype_isSU (rt)) | |
3591 | { | |
3592 | uentry param = usymtab_lookupQuiet (utab, uentry_rawName (arg)); | |
3593 | checkParamReturn (param); | |
3594 | } | |
3595 | } | |
3596 | } end_uentryList_elements; | |
3597 | ||
3598 | globSet_allElements (sglobs, el) | |
3599 | { | |
3600 | uentry current = sRef_getUentry (el); | |
3601 | ||
3602 | if (uentry_isVariable (current) && !uentry_isRealFunction (current)) | |
3603 | { | |
3604 | checkGlobalReturn (current, el); | |
3605 | } | |
3606 | } end_globSet_allElements; | |
3607 | ||
3608 | globSet_allElements (uglobs, el) | |
3609 | { | |
3610 | if (!globSet_member (sglobs, el)) | |
3611 | { | |
3612 | uentry current = sRef_getUentry (el); | |
3613 | ||
3614 | ||
3615 | if (uentry_isVariable (current) | |
3616 | && !uentry_isRealFunction (current)) | |
3617 | { | |
3618 | checkGlobalReturn (current, sRef_undefined); | |
3619 | } | |
3620 | } | |
3621 | } end_globSet_allElements; | |
3622 | } | |
3623 | ||
3624 | } | |
3625 | ||
3626 | void | |
3627 | usymtab_quietExitScope (fileloc loc) | |
3628 | /*@globals utab, globtab, filetab; @*/ | |
3629 | /*@modifies utab@*/ | |
3630 | { | |
3631 | usymtab t = utab->env; | |
3632 | ||
3633 | if (utab->reftable != NULL) | |
3634 | { | |
3635 | int i; | |
3636 | ||
3637 | for (i = 0; i < utab->nentries; i++) | |
3638 | { | |
3639 | uentry current = utab->entries[i]; | |
3640 | uentry old = usymtab_lookupAux (t, uentry_rawName (current)); | |
3641 | ||
3642 | uentry_mergeState (old, current, loc, FALSE, FALSE, FALSE, NOCLAUSE); | |
3643 | } | |
3644 | } | |
3645 | ||
3646 | llassert (t != NULL); | |
3647 | ||
3648 | if (t->lexlevel > paramsScope) | |
3649 | { | |
3650 | t->guards = guardSet_levelUnion (t->guards, utab->guards, t->lexlevel); | |
3651 | t->aliases = aliasTable_levelUnionSeq (t->aliases, utab->aliases, | |
3652 | t->lexlevel); | |
3653 | utab->aliases = aliasTable_undefined; | |
3654 | } | |
3655 | ||
3656 | t->mustBreak = utab->mustBreak; | |
3657 | t->exitCode = utab->exitCode; | |
3658 | ||
3659 | usymtab_freeLevel (utab); | |
3660 | ||
3661 | utab = t; | |
3662 | } | |
3663 | ||
3664 | /* | |
3665 | ** Exit a scope with no checking, lose alias states. | |
3666 | ** (When should this be used?) | |
3667 | */ | |
3668 | ||
3669 | void usymtab_quietPlainExitScope (void) | |
3670 | /*@globals utab, globtab, filetab@*/ | |
3671 | /*@modifies utab@*/ | |
3672 | { | |
3673 | usymtab t = utab->env; | |
3674 | ||
3675 | llassert (t != NULL); | |
3676 | llassert (NOALIAS (utab->aliases, t->aliases)); | |
3677 | usymtab_freeLevel (utab); | |
3678 | utab = t; | |
3679 | } | |
3680 | ||
3681 | void usymtab_exitScope (exprNode expr) | |
3682 | /*@globals utab, filetab, globtab@*/ | |
3683 | /*@modifies utab, globtab@*/ | |
3684 | { | |
3685 | usymtab ctab = usymtab_undefined; | |
3686 | usymtab lctab = usymtab_undefined; | |
3687 | bool mustReturn = exprNode_mustEscape (expr); | |
3688 | ||
3689 | if (utab->kind == US_CBRANCH) | |
3690 | { | |
3691 | /* | |
3692 | ** save the case branches, remove the first non-cbranch | |
3693 | */ | |
3694 | ||
3695 | ctab = utab; | |
3696 | ||
3697 | while (utab->kind == US_CBRANCH) | |
3698 | { | |
3699 | lctab = utab; | |
3700 | utab = utab->env; | |
3701 | llassert (utab != GLOBAL_ENV); | |
3702 | } | |
3703 | } | |
3704 | ||
3705 | if (utab->kind == US_TBRANCH || utab->kind == US_FBRANCH | |
3706 | || utab->kind == US_CBRANCH || utab->kind == US_SWITCH) { | |
3707 | ||
3708 | if (context_inMacro ()) { | |
3709 | /* evs 2000-07-25 */ | |
3710 | /* Unparseable macro may end inside nested scope. Deal with it. */ | |
3711 | ||
3712 | llerror (FLG_SYNTAX, message ("Problem parsing macro body of %s (unbalanced scopes). Attempting to recover, recommend /*@notfunction@*/ before macro definition.", | |
3713 | context_inFunctionName ())); | |
3714 | ||
3715 | while (utab->kind == US_TBRANCH | |
3716 | || utab->kind == US_FBRANCH | |
3717 | || utab->kind == US_CBRANCH | |
3718 | || utab->kind == US_SWITCH) | |
3719 | { | |
3720 | utab = utab->env; | |
3721 | llassert (utab != GLOBAL_ENV); | |
3722 | } | |
3723 | } else { | |
3724 | llcontbug (("exitScope: in branch: %s", usymtab_unparseStack ())); | |
3725 | /*@-branchstate@*/ | |
3726 | } /*@=branchstate@*/ | |
3727 | } | |
3728 | ||
3729 | /* | |
3730 | ** check all variables in scope were used | |
3731 | */ | |
3732 | ||
3733 | /* | |
3734 | ** bogus errors if this is the normal inside a switch, | |
3735 | ** since cases have not been merged yet. Should probably | |
3736 | ** still check this, but I'm too lazy at the moment... | |
3737 | */ | |
3738 | ||
3739 | llassertfatal (utab->env != GLOBAL_ENV); | |
3740 | ||
3741 | if (utab->env->kind != US_SWITCH) | |
3742 | { | |
3743 | usymtab_allUsed (); | |
3744 | } | |
3745 | ||
3746 | /* | |
3747 | ** check aliasing: all only params are released (dead) | |
3748 | ** definition: all out params are defined, all modified params | |
3749 | ** are completely defined | |
3750 | ** | |
3751 | ** NOTE: note for exiting paramsScope, since checkReturn should be | |
3752 | ** called first. | |
3753 | */ | |
3754 | ||
3755 | if (!mustReturn && (usymtab_lexicalLevel () > functionScope)) | |
3756 | { | |
3757 | /* | |
3758 | ** should only call this is end of scope is reachable... | |
3759 | */ | |
3760 | ||
3761 | usymtab_checkFinalScope (FALSE); | |
3762 | } | |
3763 | ||
3764 | if (usymtab_lexicalLevel () == paramsScope && context_inFunctionLike ()) | |
3765 | { | |
3766 | /* | |
3767 | ** leaving a function, need to fix up globals | |
3768 | */ | |
3769 | ||
3770 | uentryList params = context_getParams (); | |
3771 | globSet globs = context_getUsedGlobs (); | |
3772 | ||
3773 | ||
3774 | uentryList_elements (params, ue) | |
3775 | { | |
3776 | uentry_fixupSref (ue); | |
3777 | } end_uentryList_elements; | |
3778 | ||
3779 | clearFunctionTypes (); | |
3780 | ||
3781 | ||
3782 | globSet_allElements (globs, el) | |
3783 | { | |
3784 | if (sRef_isCvar (el)) | |
3785 | { | |
3786 | uentry current; | |
3787 | int index = sRef_getScopeIndex (el); | |
3788 | ||
3789 | if (sRef_isFileStatic (el)) | |
3790 | { | |
3791 | llassert (usymtab_isDefined (filetab)); | |
3792 | current = usymtab_fetchIndex (filetab, index); | |
3793 | } | |
3794 | else | |
3795 | { | |
3796 | current = usymtab_fetchIndex (globtab, index); | |
3797 | } | |
3798 | ||
3799 | if (uentry_isVariable (current)) | |
3800 | { | |
3801 | uentry_fixupSref (current); | |
3802 | } | |
3803 | else | |
3804 | { | |
3805 | sRef_clearDerived (uentry_getSref (current)); | |
3806 | } | |
3807 | } | |
3808 | } end_globSet_allElements; | |
3809 | } | |
3810 | ||
3811 | usymtab_quietExitScope (exprNode_loc (expr)); | |
3812 | ||
3813 | if (lctab != usymtab_undefined) | |
3814 | { | |
3815 | /*@i@*/ lctab->env = utab; | |
3816 | /*@i@*/ utab = ctab; | |
3817 | /*@-branchstate@*/ } /*@=branchstate@*/ | |
3818 | /*@-globstate@*/ | |
3819 | } | |
3820 | /*@=globstate@*/ | |
3821 | ||
3822 | /* | |
3823 | ** yikes! don't let the '170 kids see this one... | |
3824 | */ | |
3825 | ||
3826 | int | |
3827 | uentry_directParamNo (uentry ue) | |
3828 | { | |
3829 | if (uentry_isVar (ue)) | |
3830 | { | |
3831 | sRef sr = uentry_getSref (ue); | |
3832 | ||
3833 | if (sRef_lexLevel (sr) == functionScope) | |
3834 | { | |
3835 | /*@access sRef@*/ /*@-null@*/ | |
3836 | int index = sr->info->cvar->index; | |
3837 | /*@noaccess sRef@*/ /*@=null@*/ | |
3838 | ||
3839 | if (index < uentryList_size (context_getParams ())) | |
3840 | { | |
3841 | return index; | |
3842 | } | |
3843 | } | |
3844 | } | |
3845 | return -1; | |
3846 | } | |
3847 | ||
3848 | /*@dependent@*/ /*@exposed@*/ uentry | |
3849 | usymtab_getParam (int paramno) | |
3850 | /*@globals utab@*/ | |
3851 | { | |
3852 | /* | |
3853 | ** requires in a function context (checked) | |
3854 | ** | |
3855 | ** depends on no nested functions --- the function | |
3856 | ** parameters are ALWAYS one scope inside the global scope | |
3857 | ** and entered in order! | |
3858 | */ | |
3859 | usymtab s = utab; | |
3860 | ||
3861 | if (!context_inFunctionLike ()) | |
3862 | llfatalbug (message ("usymtab_getParam: not in function context: %q", | |
3863 | context_unparse ())); | |
3864 | ||
3865 | while (s->lexlevel > paramsScope) | |
3866 | { | |
3867 | s = s->env; | |
3868 | } | |
3869 | ||
3870 | llassert (usymtab_isDefined (s)); | |
3871 | ||
3872 | if (paramno >= s->nentries) | |
3873 | { | |
3874 | /* | |
3875 | ** Parse errors lead to this. | |
3876 | */ | |
3877 | ||
3878 | uentry err = uentry_makeVariableLoc (cstring_makeLiteralTemp ("<error>"), | |
3879 | ctype_unknown); | |
3880 | ||
3881 | uentry_markOwned (err); | |
3882 | return (err); | |
3883 | } | |
3884 | ||
3885 | return (s->entries[paramno]); | |
3886 | } | |
3887 | ||
3888 | static /*@dependent@*/ /*@exposed@*/ uentry | |
3889 | usymtab_getRefTab (/*@notnull@*/ usymtab u, int level, usymId index) | |
3890 | { | |
3891 | uentry ue; | |
3892 | ||
3893 | ||
3894 | ue = usymtab_getRefNoisy (u, level, index); | |
3895 | ||
3896 | ||
3897 | if (uentry_isUndefined (ue)) | |
3898 | { | |
3899 | llbug (message ("usymtab_getRef: out of range: %d. level = %d", | |
3900 | index, level)); | |
3901 | } | |
3902 | ||
3903 | ||
3904 | return ue; | |
3905 | } | |
3906 | ||
3907 | static /*@dependent@*/ /*@exposed@*/ usymtab | |
3908 | usymtab_dropEnv (/*@notnull@*/ usymtab s) | |
3909 | { | |
3910 | if (s->kind == US_CBRANCH) | |
3911 | { | |
3912 | usymtab t = s; | |
3913 | ||
3914 | do | |
3915 | { | |
3916 | t = s; | |
3917 | s = s->env; | |
3918 | llassert (s != GLOBAL_ENV); | |
3919 | } while (s->kind == US_CBRANCH); | |
3920 | /* drop all cases (except in nested scopes */ | |
3921 | ||
3922 | s = t; | |
3923 | llassert (s != GLOBAL_ENV); | |
3924 | } | |
3925 | ||
3926 | if (s->kind == US_FBRANCH) | |
3927 | { | |
3928 | s = s->env; /* skip the true branch */ | |
3929 | llassert (usymtab_isDefined (s)); | |
3930 | llassert (s->kind == US_TBRANCH); | |
3931 | } | |
3932 | ||
3933 | llassert (s != GLOBAL_ENV); | |
3934 | s = s->env; | |
3935 | ||
3936 | return s; | |
3937 | } | |
3938 | ||
3939 | /*@dependent@*/ /*@exposed@*/ uentry | |
3940 | usymtab_getRefQuiet (int level, usymId index) | |
3941 | /*@globals utab@*/ | |
3942 | { | |
3943 | usymtab s = utab; | |
3944 | ||
3945 | ||
3946 | llassert (s != NULL); | |
3947 | llassert (index >= 0); | |
3948 | ||
3949 | if (level > s->lexlevel) | |
3950 | { | |
3951 | ||
3952 | return uentry_undefined; | |
3953 | } | |
3954 | ||
3955 | llassertprint (level <= s->lexlevel, ("level: %d / lexlevel: %d", | |
3956 | level, s->lexlevel)); | |
3957 | ||
3958 | while (s->lexlevel > level) | |
3959 | { | |
3960 | if (usymtab_isBranch (s)) | |
3961 | { | |
3962 | int eindex = refTable_lookup (s, level, index); | |
3963 | ||
3964 | if (eindex != NOT_FOUND) | |
3965 | { | |
3966 | return (s->entries[eindex]); | |
3967 | } | |
3968 | } | |
3969 | ||
3970 | s = usymtab_dropEnv (s); | |
3971 | } | |
3972 | ||
3973 | while (usymtab_isBranch (s) && s->lexlevel == level) | |
3974 | { | |
3975 | int eindex = refTable_lookup (s, level, index); | |
3976 | ||
3977 | if (eindex != NOT_FOUND) | |
3978 | { | |
3979 | return (s->entries[eindex]); | |
3980 | } | |
3981 | ||
3982 | s = usymtab_dropEnv (s); | |
3983 | } | |
3984 | ||
3985 | if (index >= s->nentries) | |
3986 | { | |
3987 | return uentry_undefined; | |
3988 | } | |
3989 | ||
3990 | llassert (!uentry_isUndefined (s->entries[index])); | |
3991 | ||
3992 | return s->entries[index]; | |
3993 | } | |
3994 | ||
3995 | static /*@dependent@*/ /*@exposed@*/ uentry | |
3996 | usymtab_getRefNoisy (/*@notnull@*/ usymtab s, int level, usymId index) | |
3997 | { | |
3998 | usymtab otab = s; | |
3999 | uentry ue = uentry_undefined; | |
4000 | ||
4001 | ||
4002 | llassert (index >= 0); | |
4003 | ||
4004 | ||
4005 | while (s->lexlevel > level) | |
4006 | { | |
4007 | ||
4008 | if (usymtab_isBranch (s)) | |
4009 | { | |
4010 | int eindex = refTable_lookup (s, level, index); | |
4011 | ||
4012 | if (eindex != NOT_FOUND) | |
4013 | { | |
4014 | ue = s->entries[eindex]; | |
4015 | ||
4016 | if (s != otab) | |
4017 | { | |
4018 | while (!usymtab_isBranch (otab)) | |
4019 | { | |
4020 | otab = usymtab_dropEnv (otab); | |
4021 | llassert (otab != GLOBAL_ENV); | |
4022 | } | |
4023 | ||
4024 | if (refTable_lookup (otab, level, index) == NOT_FOUND) | |
4025 | { | |
4026 | ue = usymtab_addRefEntry (otab, uentry_rawName (ue)); | |
4027 | } | |
4028 | else | |
4029 | { | |
4030 | ; | |
4031 | } | |
4032 | } | |
4033 | ||
4034 | return ue; | |
4035 | } | |
4036 | } | |
4037 | ||
4038 | s = usymtab_dropEnv (s); | |
4039 | } | |
4040 | ||
4041 | llassert (usymtab_isDefined (s)); | |
4042 | ||
4043 | while (usymtab_isBranch (s) && s->lexlevel == level) | |
4044 | { | |
4045 | int eindex = refTable_lookup (s, level, index); | |
4046 | ||
4047 | ||
4048 | if (eindex != NOT_FOUND) | |
4049 | { | |
4050 | ue = s->entries[eindex]; | |
4051 | ||
4052 | if (s != otab) | |
4053 | { | |
4054 | while (!usymtab_isBranch (otab)) | |
4055 | { | |
4056 | otab = usymtab_dropEnv (otab); | |
4057 | llassert (otab != GLOBAL_ENV); | |
4058 | } | |
4059 | ||
4060 | ue = usymtab_addRefEntry (otab, uentry_rawName (ue)); | |
4061 | } | |
4062 | else | |
4063 | { | |
4064 | ; | |
4065 | } | |
4066 | ||
4067 | return ue; | |
4068 | } | |
4069 | ||
4070 | s = usymtab_dropEnv (s); | |
4071 | } | |
4072 | ||
4073 | if (s->lexlevel == level && (index < s->nentries)) | |
4074 | { | |
4075 | ue = s->entries[index]; | |
4076 | ||
4077 | if (uentry_isValid (ue)) | |
4078 | { | |
4079 | if (s != otab) | |
4080 | { | |
4081 | while (!usymtab_isBranch (otab)) | |
4082 | { | |
4083 | otab = usymtab_dropEnv (otab); | |
4084 | ||
4085 | if (otab == GLOBAL_ENV) | |
4086 | { | |
4087 | return ue; | |
4088 | } | |
4089 | } | |
4090 | ||
4091 | ue = usymtab_addRefEntry (otab, uentry_rawName (ue)); | |
4092 | } | |
4093 | else | |
4094 | { | |
4095 | } | |
4096 | } | |
4097 | ||
4098 | return ue; | |
4099 | } | |
4100 | ||
4101 | ||
4102 | if (index >= s->nentries) | |
4103 | { | |
4104 | return uentry_undefined; | |
4105 | } | |
4106 | ||
4107 | llassert (!uentry_isUndefined (s->entries[index])); | |
4108 | ||
4109 | return s->entries[index]; | |
4110 | } | |
4111 | ||
4112 | /* | |
4113 | ** looking up entries | |
4114 | ** | |
4115 | ** If entry is inside a branch, then copy it, and put it into | |
4116 | ** the branch table. | |
4117 | */ | |
4118 | ||
4119 | static | |
4120 | int refTable_lookup (/*@notnull@*/ usymtab ut, int level, int index) | |
4121 | { | |
4122 | refTable rt = ut->reftable; | |
4123 | int i; | |
4124 | ||
4125 | llassert (rt != NULL); | |
4126 | ||
4127 | ||
4128 | for (i = 0; i < ut->nentries; i++) | |
4129 | { | |
4130 | if (rt[i]->level == level && rt[i]->index == index) | |
4131 | { | |
4132 | return i; | |
4133 | } | |
4134 | } | |
4135 | ||
4136 | return NOT_FOUND; | |
4137 | } | |
4138 | ||
4139 | static | |
4140 | /*@only@*/ refentry refentry_create (int level, int index) | |
4141 | { | |
4142 | refentry r = (refentry) dmalloc (sizeof (*r)); | |
4143 | ||
4144 | r->level = level; | |
4145 | r->index = index; | |
4146 | ||
4147 | return r; | |
4148 | } | |
4149 | ||
4150 | static /*@dependent@*/ /*@exposed@*/ uentry | |
4151 | usymtab_addRefEntry (/*@notnull@*/ usymtab s, cstring k) | |
4152 | { | |
4153 | int eindex; | |
4154 | usymtab ut = s; | |
4155 | ||
4156 | llassert (ut->reftable != NULL); | |
4157 | ||
4158 | while (s != GLOBAL_ENV) | |
4159 | { | |
4160 | eindex = usymtab_getIndex (s, k); | |
4161 | ||
4162 | if (eindex != NOT_FOUND) | |
4163 | { | |
4164 | uentry current = s->entries[eindex]; | |
4165 | ||
4166 | if (uentry_isVar (current) && !ctype_isFunction (uentry_getType (current))) | |
4167 | { | |
4168 | uentry ue; | |
4169 | ||
4170 | DPRINTF (("Here: copying %s", uentry_unparseFull (current))); | |
4171 | ||
4172 | ue = uentry_copy (current); | |
4173 | ||
4174 | DPRINTF (("Here: copying %s", uentry_unparseFull (ue))); | |
4175 | ||
4176 | usymtab_addEntryQuiet (ut, ue); | |
4177 | ||
4178 | if (s->reftable != NULL) | |
4179 | { | |
4180 | refentry ref = s->reftable[eindex]; | |
4181 | ||
4182 | ||
4183 | ut->reftable[ut->nentries - 1] | |
4184 | = refentry_create (ref->level, ref->index); | |
4185 | } | |
4186 | else | |
4187 | { | |
4188 | ut->reftable[ut->nentries - 1] | |
4189 | = refentry_create (s->lexlevel, eindex); | |
4190 | } | |
4191 | ||
4192 | return (ue); | |
4193 | } | |
4194 | else | |
4195 | { | |
4196 | return (current); | |
4197 | } | |
4198 | } | |
4199 | ||
4200 | s = usymtab_dropEnv (s); | |
4201 | } | |
4202 | ||
4203 | return uentry_undefined; | |
4204 | } | |
4205 | ||
4206 | static uentry usymtab_lookupAux (usymtab s, cstring k) | |
4207 | { | |
4208 | DPRINTF (("Lookup: %s", k)); | |
4209 | ||
4210 | while (s != GLOBAL_ENV) | |
4211 | { | |
4212 | int eindex = usymtab_getIndex (s, k); | |
4213 | ||
4214 | if (eindex != NOT_FOUND) | |
4215 | { | |
4216 | uentry ret = s->entries[eindex]; | |
4217 | ||
4218 | DPRINTF (("Found: %s", uentry_unparseFull (ret))); | |
4219 | return (ret); | |
4220 | } | |
4221 | ||
4222 | if (s->kind == US_TBRANCH || s->kind == US_FBRANCH | |
4223 | || s->kind == US_CBRANCH) | |
4224 | { | |
4225 | uentry ret = usymtab_addRefEntry (s, k); | |
4226 | DPRINTF (("Ref entry: %s", uentry_unparseFull (ret))); | |
4227 | return ret; | |
4228 | } | |
4229 | ||
4230 | s = s->env; | |
4231 | } | |
4232 | ||
4233 | return uentry_undefined; | |
4234 | } | |
4235 | ||
4236 | static /*@dependent@*/ /*@exposed@*/ uentry | |
4237 | usymtab_lookupQuiet (usymtab s, cstring k) | |
4238 | { | |
4239 | int eindex; | |
4240 | ||
4241 | while (s != GLOBAL_ENV) | |
4242 | { | |
4243 | eindex = usymtab_getIndex (s, k); | |
4244 | ||
4245 | if (eindex != NOT_FOUND) | |
4246 | { | |
4247 | uentry ret = s->entries[eindex]; | |
4248 | return (ret); | |
4249 | } | |
4250 | ||
4251 | s = s->env; | |
4252 | } | |
4253 | ||
4254 | return uentry_undefined; | |
4255 | } | |
4256 | ||
4257 | /*@dependent@*/ /*@observer@*/ uentry | |
4258 | usymtab_lookupSafe (cstring k) | |
4259 | /*@globals utab@*/ | |
4260 | { | |
4261 | DPRINTF (("Lookup safe: %s", k)); | |
4262 | return (usymtab_lookupAux (utab, k)); | |
4263 | } | |
4264 | ||
4265 | uentry | |
4266 | usymtab_lookupExpose (cstring k) | |
4267 | /*@globals utab@*/ | |
4268 | { | |
4269 | uentry ce = usymtab_lookupAux (utab, k); | |
4270 | ||
4271 | if (uentry_isUndefined (ce)) | |
4272 | { | |
4273 | llfatalbug (message ("usymtab_lookup: not found: *%s*", k)); | |
4274 | } | |
4275 | ||
4276 | if (uentry_isPriv (ce)) | |
4277 | { | |
4278 | llfatalbug (message ("usymtab_lookup: private: *%s*", k)); | |
4279 | } | |
4280 | ||
4281 | return ce; | |
4282 | } | |
4283 | ||
4284 | uentry usymtab_lookupExposeGlob (cstring k) | |
4285 | { | |
4286 | return (usymtab_lookupGlobSafe (k)); | |
4287 | } | |
4288 | ||
4289 | uentry usymtab_lookupGlob (cstring k) | |
4290 | /*@globals globtab@*/ | |
4291 | { | |
4292 | uentry ce = usymtab_lookupAux (globtab, k); | |
4293 | ||
4294 | if (uentry_isUndefined (ce)) | |
4295 | llfatalbug (message ("usymtab_lookup: not found: %s", k)); | |
4296 | ||
4297 | if (uentry_isPriv (ce)) | |
4298 | llfatalbug (message ("usymtab_lookup: private: %s", k)); | |
4299 | ||
4300 | return ce; | |
4301 | } | |
4302 | ||
4303 | /*@observer@*/ uentry | |
4304 | usymtab_lookupGlobSafe (cstring k) | |
4305 | /*@globals globtab@*/ | |
4306 | { | |
4307 | uentry ce = usymtab_lookupAux (globtab, k); | |
4308 | ||
4309 | return ce; | |
4310 | } | |
4311 | ||
4312 | uentry usymtab_lookupEither (cstring k) | |
4313 | /*@globals utab@*/ | |
4314 | { | |
4315 | uentry ce = usymtab_lookupSafe (k); | |
4316 | ||
4317 | if (uentry_isUndefined (ce)) | |
4318 | llfatalerror (message ("usymtab_lookup: not found: %s", k)); | |
4319 | ||
4320 | return ce; | |
4321 | } | |
4322 | ||
4323 | # ifndef NOLCL | |
4324 | ctype | |
4325 | usymtab_lookupType (cstring k) | |
4326 | /*@globals globtab@*/ | |
4327 | { | |
4328 | usymId uid = usymtab_getTypeId (k); | |
4329 | ||
4330 | if (uid == USYMIDINVALID) | |
4331 | { | |
4332 | llcontbug (message ("usymtab_lookupType: not found: %s", k)); | |
4333 | return ctype_unknown; | |
4334 | } | |
4335 | ||
4336 | return (uentry_getRealType (usymtab_getTypeEntry (uid))); | |
4337 | } | |
4338 | # endif | |
4339 | ||
4340 | ctype | |
4341 | usymtab_lookupAbstractType (cstring k) /*@globals globtab@*/ | |
4342 | { | |
4343 | usymId uid = usymtab_getTypeId (k); | |
4344 | ||
4345 | if (uid == USYMIDINVALID) | |
4346 | { | |
4347 | llcontbug (message ("usymtab_lookupType: not found: %s", k)); | |
4348 | return ctype_unknown; | |
4349 | } | |
4350 | ||
4351 | return (uentry_getAbstractType (usymtab_getTypeEntry (uid))); | |
4352 | } | |
4353 | ||
4354 | /* | |
4355 | ** if there is an unnamed lcl-specified struct tag matching | |
4356 | ** the uentryList, return its datatype. Otherwise, returns | |
4357 | ** ctype_undefined. | |
4358 | */ | |
4359 | ||
4360 | ctype | |
4361 | usymtab_structFieldsType (uentryList f) | |
4362 | /*@globals globtab@*/ | |
4363 | { | |
4364 | return (usymtab_suFieldsType (f, TRUE)); | |
4365 | } | |
4366 | ||
4367 | ctype | |
4368 | usymtab_unionFieldsType (uentryList f) | |
4369 | /*@globals globtab@*/ | |
4370 | { | |
4371 | return (usymtab_suFieldsType (f, FALSE)); | |
4372 | } | |
4373 | ||
4374 | static ctype | |
4375 | usymtab_suFieldsType (uentryList f, bool isStruct) | |
4376 | /*@globals globtab@*/ | |
4377 | { | |
4378 | int i; | |
4379 | ||
4380 | if (fileloc_isSpec (g_currentloc)) return (ctype_undefined); | |
4381 | ||
4382 | for (i = 0; i < globtab->nentries; i++) | |
4383 | { | |
4384 | uentry current = globtab->entries[i]; | |
4385 | ||
4386 | if ((isStruct | |
4387 | ? uentry_isStructTag (current) : uentry_isUnionTag (current))) | |
4388 | { | |
4389 | if (isFakeTag (uentry_rawName (current))) | |
4390 | { | |
4391 | ctype ct = uentry_getType (current); | |
4392 | ||
4393 | if ((isStruct ? ctype_isStruct (ct) : ctype_isUnion (ct)) | |
4394 | && (uentryList_matchFields (f, ctype_getFields (ct)))) | |
4395 | { | |
4396 | return uentry_getAbstractType (current); | |
4397 | } | |
4398 | } | |
4399 | } | |
4400 | } | |
4401 | ||
4402 | return ctype_undefined; | |
4403 | } | |
4404 | ||
4405 | ctype | |
4406 | usymtab_enumEnumNameListType (enumNameList f) | |
4407 | /*@globals globtab@*/ | |
4408 | { | |
4409 | int i; | |
4410 | ||
4411 | for (i = 0; i < globtab->nentries; i++) | |
4412 | { | |
4413 | uentry current = globtab->entries[i]; | |
4414 | ||
4415 | if (uentry_isEnumTag (current)) | |
4416 | { | |
4417 | if (isFakeTag (uentry_rawName (current))) | |
4418 | { | |
4419 | ctype ct = uentry_getType (current); | |
4420 | ||
4421 | if (ctype_isEnum (ct) && (enumNameList_match (f, ctype_elist (ct)))) | |
4422 | { | |
4423 | return uentry_getType (current); | |
4424 | } | |
4425 | } | |
4426 | } | |
4427 | } | |
4428 | ||
4429 | return ctype_undefined; | |
4430 | } | |
4431 | ||
4432 | bool | |
4433 | usymtab_exists (cstring k) | |
4434 | /*@globals utab@*/ | |
4435 | { | |
4436 | uentry ce = usymtab_lookupSafe (k); | |
4437 | ||
4438 | return (!(uentry_isUndefined (ce)) && !(uentry_isPriv (ce))); | |
4439 | } | |
4440 | ||
4441 | bool | |
4442 | usymtab_existsReal (cstring k) | |
4443 | /*@globals utab@*/ | |
4444 | { | |
4445 | uentry ce = usymtab_lookupSafe (k); | |
4446 | ||
4447 | return (!(uentry_isUndefined (ce)) | |
4448 | && !(uentry_isPriv (ce)) | |
4449 | && !(uentry_isExpandedMacro (ce))); | |
4450 | } | |
4451 | ||
4452 | bool | |
4453 | usymtab_existsGlob (cstring k) | |
4454 | /*@globals globtab@*/ | |
4455 | { | |
4456 | uentry ce = usymtab_lookupAux (globtab, k); | |
4457 | ||
4458 | return (!(uentry_isUndefined (ce)) && !(uentry_isPriv (ce))); | |
4459 | } | |
4460 | ||
4461 | # ifndef NOLCL | |
4462 | bool | |
4463 | usymtab_existsEither (cstring k) | |
4464 | /*@globals utab@*/ | |
4465 | { | |
4466 | uentry ce = usymtab_lookupAux (utab, k); | |
4467 | ||
4468 | return (uentry_isValid (ce)); | |
4469 | } | |
4470 | ||
4471 | bool | |
4472 | usymtab_existsGlobEither (cstring k) | |
4473 | /*@globals globtab@*/ | |
4474 | { | |
4475 | uentry ce = usymtab_lookupAux (globtab, k); | |
4476 | ||
4477 | return (uentry_isValid (ce)); | |
4478 | } | |
4479 | # endif | |
4480 | ||
4481 | bool | |
4482 | usymtab_existsType (cstring k) | |
4483 | /*@globals globtab@*/ | |
4484 | { | |
4485 | uentry ce = usymtab_lookupAux (globtab, k); | |
4486 | ||
4487 | return (!(uentry_isUndefined (ce)) && !(uentry_isPriv (ce)) && uentry_isDatatype (ce)); | |
4488 | } | |
4489 | ||
4490 | bool | |
4491 | usymtab_existsTypeEither (cstring k) | |
4492 | /*@globals globtab@*/ | |
4493 | { | |
4494 | uentry ce = usymtab_lookupAux (globtab, k); | |
4495 | ||
4496 | return (uentry_isValid (ce) && uentry_isDatatype (ce)); | |
4497 | } | |
4498 | ||
4499 | bool | |
4500 | usymtab_existsStructTag (cstring k) /*@globals globtab@*/ | |
4501 | { | |
4502 | cstring sname = makeStruct (k); | |
4503 | uentry ce = usymtab_lookupAux (globtab, sname); | |
4504 | ||
4505 | cstring_free (sname); | |
4506 | ||
4507 | ||
4508 | return (!(uentry_isUndefined (ce)) && !(uentry_isPriv (ce))); | |
4509 | } | |
4510 | ||
4511 | bool | |
4512 | usymtab_existsUnionTag (cstring k) /*@globals globtab@*/ | |
4513 | { | |
4514 | cstring uname = makeUnion (k); | |
4515 | uentry ce = usymtab_lookupAux (globtab, uname); | |
4516 | ||
4517 | cstring_free (uname); | |
4518 | ||
4519 | return (!(uentry_isUndefined (ce)) && !(uentry_isPriv (ce))); | |
4520 | } | |
4521 | ||
4522 | bool | |
4523 | usymtab_existsEnumTag (cstring k) /*@globals globtab@*/ | |
4524 | { | |
4525 | cstring ename = makeEnum (k); | |
4526 | uentry ce = usymtab_lookupAux (globtab, ename); | |
4527 | ||
4528 | cstring_free (ename); | |
4529 | return (!(uentry_isUndefined (ce)) && !(uentry_isPriv (ce))); | |
4530 | } | |
4531 | ||
4532 | # ifndef NOLCL | |
4533 | bool usymtab_existsVar (cstring k) | |
4534 | /*@globals utab@*/ | |
4535 | { | |
4536 | uentry ce = usymtab_lookupSafe (k); | |
4537 | ||
4538 | return (!(uentry_isUndefined (ce)) && !(uentry_isPriv (ce)) && (uentry_isVar (ce))); | |
4539 | } | |
4540 | # endif | |
4541 | ||
4542 | /* | |
4543 | ** destructors | |
4544 | */ | |
4545 | ||
4546 | static void | |
4547 | refTable_free (/*@only@*/ /*@null@*/ refTable x, int nentries) | |
4548 | { | |
4549 | if (x != NULL) | |
4550 | { | |
4551 | int i; | |
4552 | ||
4553 | for (i = 0; i < nentries; i++) | |
4554 | { | |
4555 | sfree (x[i]); | |
4556 | } | |
4557 | ||
4558 | sfree (x); | |
4559 | } | |
4560 | } | |
4561 | ||
4562 | static void | |
4563 | usymtab_freeLevel (/*@notnull@*/ /*@only@*/ usymtab u) | |
4564 | /*@globals globtab, utab, filetab@*/ | |
4565 | { | |
4566 | int i; | |
4567 | ||
4568 | aliasTable_free (u->aliases); | |
dc92450f | 4569 | // environmentTable_free (u->environment); |
616915dd | 4570 | refTable_free (u->reftable, u->nentries); |
4571 | ||
4572 | if (u == filetab || u == globtab) | |
4573 | { | |
4574 | for (i = 0; i < u->nentries; i++) | |
4575 | { | |
4576 | uentry_freeComplete (u->entries[i]); | |
4577 | } | |
4578 | } | |
4579 | else | |
4580 | { | |
4581 | for (i = 0; i < u->nentries; i++) | |
4582 | { | |
4583 | uentry_free (u->entries[i]); | |
4584 | } | |
4585 | } | |
4586 | ||
4587 | guardSet_free (u->guards); | |
4588 | sfree (u->entries); | |
4589 | ||
4590 | if (u != globtab | |
4591 | && u != utab | |
4592 | && u != filetab) | |
4593 | { | |
4594 | llassert (u->htable == NULL); | |
4595 | sfree (u); | |
4596 | } | |
4597 | ||
4598 | /*@-mustfree@*/ | |
4599 | } /*@=mustfree@*/ | |
4600 | ||
4601 | static void | |
4602 | usymtab_freeAux (/*@only@*/ usymtab u) | |
4603 | /*@globals globtab, utab, filetab@*/ | |
4604 | /*@modifies u@*/ | |
4605 | { | |
4606 | while (u != GLOBAL_ENV) | |
4607 | { | |
4608 | usymtab t = u->env; | |
4609 | usymtab_freeLevel (u); | |
4610 | u = t; | |
4611 | /*@-branchstate@*/ | |
4612 | } | |
4613 | /*@=branchstate@*/ | |
4614 | } | |
4615 | ||
4616 | void usymtab_free () | |
4617 | /*@globals killed utab, globtab, filetab@*/ | |
4618 | /*@modifies utab@*/ | |
4619 | { | |
4620 | dbgfree = TRUE; | |
4621 | usymtab_freeAux (utab); | |
4622 | } | |
4623 | ||
4624 | static int usymtab_lexicalLevel (void) /*@globals utab@*/ | |
4625 | { | |
4626 | return (utab->lexlevel); | |
4627 | } | |
4628 | ||
4629 | bool usymtab_inGlobalScope () /*@globals utab, globtab@*/ | |
4630 | { | |
4631 | return (utab == globtab); | |
4632 | } | |
4633 | ||
4634 | bool usymtab_inFileScope () /*@globals utab@*/ | |
4635 | { | |
4636 | return (utab->lexlevel == fileScope); | |
4637 | } | |
4638 | ||
4639 | bool usymtab_inFunctionScope () /*@globals utab@*/ | |
4640 | { | |
4641 | return (utab->lexlevel == functionScope); | |
4642 | } | |
4643 | ||
4644 | # ifndef NOLCL | |
4645 | void | |
4646 | usymtab_replaceEntry (uentry s) | |
4647 | /*@globals utab, globtab@*/ | |
4648 | /*@modifies utab, s@*/ | |
4649 | { | |
4650 | usymtab_replaceEntryAux (utab, s); | |
4651 | } | |
4652 | # endif | |
4653 | ||
4654 | bool | |
4655 | usymtab_matchForwardStruct (usymId u1, usymId u2) | |
4656 | /*@globals globtab@*/ | |
4657 | { | |
4658 | uentry ue1 = usymtab_getTypeEntry (u1); | |
4659 | uentry ue2 = usymtab_getTypeEntry (u2); | |
4660 | ||
4661 | if (uentry_isAnyTag (ue2)) | |
4662 | { | |
4663 | ctype reptype = uentry_getType (ue1); | |
4664 | ||
4665 | if (ctype_isPointer (reptype)) | |
4666 | { | |
4667 | ctype repbase = ctype_getBaseType (reptype); | |
4668 | ||
4669 | if (ctype_isUA (repbase)) | |
4670 | { | |
4671 | typeId rtuid = ctype_typeId (repbase); | |
4672 | ||
4673 | if (u2 == rtuid) return TRUE; | |
4674 | ||
4675 | if (usymId_isValid (rtuid)) | |
4676 | { | |
4677 | reptype = uentry_getType (usymtab_getTypeEntry (rtuid)); | |
4678 | ||
4679 | return (ctype_isUA (reptype) && (u2 == (ctype_typeId (reptype)))); | |
4680 | } | |
4681 | } | |
4682 | } | |
4683 | } | |
4684 | ||
4685 | return FALSE; | |
4686 | } | |
4687 | ||
4688 | void usymtab_addGuards (guardSet guards) | |
4689 | /*@modifies utab@*/ | |
4690 | { | |
4691 | utab->guards = guardSet_union (utab->guards, guards); | |
4692 | } | |
4693 | ||
4694 | static bool usymtab_isGuardedAux (sRef s) | |
4695 | /*@globals utab@*/ | |
4696 | { | |
4697 | usymtab tab = utab; | |
4698 | sRef base = sRef_getRootBase (s); | |
4699 | int lowlevel = paramsScope; | |
4700 | int baselevel = sRef_lexLevel (base); | |
4701 | ||
4702 | if (sRef_isCvar (base)) | |
4703 | { | |
4704 | lowlevel = baselevel; | |
4705 | if (lowlevel < paramsScope) lowlevel = paramsScope; | |
4706 | } | |
4707 | ||
4708 | while (tab->lexlevel >= lowlevel) | |
4709 | { | |
4710 | if (guardSet_isGuarded (tab->guards, s)) | |
4711 | { | |
4712 | /* | |
4713 | if (!sRef_definitelyNull (s)) | |
4714 | { | |
4715 | sRef_setNotNull (s, fileloc_undefined); | |
4716 | } | |
4717 | */ | |
4718 | return TRUE; | |
4719 | } | |
4720 | ||
4721 | tab = usymtab_dropEnv (tab); | |
4722 | } | |
4723 | ||
4724 | return FALSE; | |
4725 | } | |
4726 | ||
4727 | void usymtab_unguard (sRef s) /*@modifies utab@*/ | |
4728 | { | |
4729 | usymtab tab = utab; | |
4730 | sRef base = sRef_getRootBase (s); | |
4731 | int lowlevel = paramsScope; | |
4732 | int baselevel = sRef_lexLevel (base); | |
4733 | ||
4734 | if (sRef_isCvar (base)) | |
4735 | { | |
4736 | lowlevel = baselevel; | |
4737 | if (lowlevel < paramsScope) lowlevel = paramsScope; | |
4738 | } | |
4739 | ||
4740 | while (tab->lexlevel >= lowlevel) | |
4741 | { | |
4742 | if (guardSet_isGuarded (tab->guards, s)) | |
4743 | { | |
4744 | guardSet_delete (tab->guards, s); | |
4745 | } | |
4746 | ||
4747 | tab = usymtab_dropEnv (tab); | |
4748 | } | |
4749 | } | |
4750 | ||
4751 | bool usymtab_isGuarded (sRef s) | |
4752 | { | |
4753 | ||
4754 | return (sRef_aliasCompleteSimplePred (usymtab_isGuardedAux, s)); | |
4755 | } | |
4756 | ||
4757 | bool usymtab_isProbableNull (sRef s) | |
4758 | { | |
4759 | return (sRef_aliasCheckSimplePred (usymtab_isProbableNullAux, s)); | |
4760 | } | |
4761 | ||
4762 | bool usymtab_isProbableDeepNull (sRef s) | |
4763 | { | |
4764 | return (sRef_deepPred (usymtab_isProbableNull, s)); | |
4765 | } | |
4766 | ||
4767 | static bool usymtab_isProbableNullAux (sRef s) | |
4768 | /*@globals utab@*/ | |
4769 | { | |
4770 | usymtab tab = utab; | |
4771 | sRef base = sRef_getRootBase (s); | |
4772 | int lowlevel = paramsScope; | |
4773 | ||
4774 | if (sRef_isCvar (base)) | |
4775 | { | |
4776 | lowlevel = sRef_lexLevel (base); | |
4777 | if (lowlevel < paramsScope) lowlevel = paramsScope; | |
4778 | } | |
4779 | ||
4780 | while (tab->lexlevel >= lowlevel) | |
4781 | { | |
4782 | if (guardSet_isProbableNull (tab->guards, s)) | |
4783 | { | |
4784 | return TRUE; | |
4785 | } | |
4786 | ||
4787 | while (tab->kind == US_CBRANCH) | |
4788 | { | |
4789 | tab = tab->env; | |
4790 | } | |
4791 | ||
4792 | llassert (usymtab_isDefined (tab)); | |
4793 | ||
4794 | if (tab->kind == US_FBRANCH) | |
4795 | { | |
4796 | tab = tab->env; | |
4797 | llassert (tab->kind == US_TBRANCH); | |
4798 | } | |
4799 | ||
4800 | tab = tab->env; | |
4801 | } | |
4802 | ||
4803 | return FALSE; | |
4804 | } | |
4805 | ||
4806 | void | |
4807 | usymtab_printGuards () | |
4808 | /*@globals utab, globtab@*/ | |
4809 | { | |
4810 | usymtab ttab = utab; | |
4811 | ||
4812 | while (ttab != globtab) | |
4813 | { | |
4814 | llmsg (message ("Guards [%d]: %q", ttab->lexlevel, | |
4815 | guardSet_unparse (ttab->guards))); | |
4816 | ttab = ttab->env; | |
4817 | } | |
4818 | } | |
4819 | ||
4820 | void | |
4821 | usymtab_displayAllUses () | |
4822 | /*@globals utab, globtab@*/ | |
4823 | { | |
4824 | usymtab copy; | |
4825 | ||
4826 | /* only in top scope */ | |
4827 | llassert (utab == globtab); | |
4828 | ||
4829 | /* need a copy, so order is not messed up by sort! */ | |
4830 | copy = usymtab_shallowCopy (globtab); | |
4831 | ||
4832 | qsort (copy->entries, (size_t)copy->nentries, | |
4833 | sizeof (*copy->entries), (int (*)(const void *, const void *)) uentry_xcompareuses); | |
4834 | ||
4835 | usymtab_entries (copy, ue) | |
4836 | { | |
4837 | if (uentry_isValid (ue)) | |
4838 | { | |
4839 | filelocList uses = uentry_getUses (ue); | |
4840 | int size = filelocList_realSize (uses); | |
4841 | ||
4842 | if (fileloc_isDefined (uentry_whereDefined (ue)) | |
4843 | && !fileloc_isLib (uentry_whereDefined (ue)) | |
4844 | && (size > 0)) | |
4845 | { | |
4846 | llmsg (message ("%q (%q), %d use%p:\n %q", | |
4847 | uentry_getName (ue), | |
4848 | fileloc_unparse (uentry_whereDefined (ue)), | |
4849 | size, filelocList_unparseUses (uses))); | |
4850 | } | |
4851 | } | |
4852 | } end_usymtab_entries; | |
4853 | ||
4854 | usymtab_shallowFree (copy); | |
4855 | } | |
4856 | ||
4857 | static /*@dependent@*/ /*@exposed@*/ usymtab | |
4858 | usymtab_getFileTab () | |
4859 | /*@globals filetab@*/ | |
4860 | { | |
4861 | llassert (filetab != NULL); | |
4862 | ||
4863 | return filetab; | |
4864 | } | |
4865 | ||
4866 | /*@only@*/ cstring | |
4867 | usymtab_unparseStack () | |
4868 | /*@globals utab@*/ | |
4869 | { | |
4870 | return (usymtab_unparseStackTab (utab)); | |
4871 | } | |
4872 | ||
4873 | static /*@only@*/ cstring | |
4874 | usymtab_unparseStackTab (usymtab t) | |
4875 | { | |
4876 | bool firstOne = TRUE; | |
4877 | cstring ret = cstring_makeLiteral ("["); | |
4878 | ||
4879 | while (t != GLOBAL_ENV) | |
4880 | { | |
4881 | if (firstOne) | |
4882 | { | |
4883 | ret = message ("%q %q", ret, usymtab_typeName (t)); | |
4884 | firstOne = FALSE; | |
4885 | } | |
4886 | else | |
4887 | { | |
4888 | ret = message ("%q, %q", ret, usymtab_typeName (t)); | |
4889 | } | |
4890 | t = t->env; | |
4891 | } | |
4892 | ||
4893 | ret = message ("%q ]", ret); | |
4894 | return ret; | |
4895 | } | |
4896 | ||
4897 | static /*@only@*/ cstring | |
4898 | usymtab_typeName (/*@notnull@*/ usymtab t) | |
4899 | { | |
4900 | switch (t->kind) | |
4901 | { | |
4902 | case US_GLOBAL: return cstring_makeLiteral ("global"); | |
4903 | case US_NORMAL: return cstring_makeLiteral ("normal"); | |
4904 | case US_TBRANCH: return cstring_makeLiteral ("true"); | |
4905 | case US_FBRANCH: return cstring_makeLiteral ("false"); | |
4906 | case US_CBRANCH: return cstring_makeLiteral ("case"); | |
4907 | case US_SWITCH: return cstring_makeLiteral ("switch"); | |
4908 | } | |
4909 | ||
4910 | BADEXIT; | |
4911 | } | |
4912 | ||
dc92450f | 4913 | // oid usymtab_testInRange (sRef s, int index) /*@globals utab;@*/ |
4914 | // { | |
4915 | // /*@i22*/ | |
4916 | // /*@-globs*/ | |
4917 | // environmentTable_testInRange (utab->environment, s, index); | |
4918 | // /*@=globs*/ | |
4919 | // } | |
4920 | // void usymtab_postopVar (sRef sr) /*@globals utab;@*/ | |
4921 | // { | |
4922 | // environmentTable_postOpvar (utab->environment, sr); | |
616915dd | 4923 | |
dc92450f | 4924 | // } |
4925 | // /* doesn't do much check here assumes checking is done before call*/ | |
4926 | // void usymtab_addExactValue(sRef s1, int val) | |
4927 | // { | |
4928 | // /*@i22@*/ utab->environment = environmentTable_addExactValue (utab->environment, s1, val); | |
4929 | // } | |
616915dd | 4930 | |
4931 | void usymtab_addMustAlias (sRef s, sRef al) | |
4932 | /*@modifies utab@*/ | |
4933 | { | |
4934 | if (sRef_isMeaningful (s) && sRef_isMeaningful (al) | |
4935 | && !(sRef_isConst (s) || sRef_isConst (al)) | |
4936 | && !(sRef_isAddress (al) && sRef_isDirectParam (sRef_getBase (al))) | |
4937 | && !(sRef_similar (s, al))) | |
4938 | { | |
4939 | utab->aliases = aliasTable_addMustAlias (utab->aliases, s, al); | |
4940 | DPRINTF (("Must alias: %s", aliasTable_unparse (utab->aliases))); | |
4941 | ||
4942 | /* | |
4943 | ** for local variable, aliasing is symmetric | |
4944 | */ | |
4945 | ||
4946 | if (sRef_isLocalVar (s) && sRef_isLocalVar (al)) | |
4947 | { | |
4948 | utab->aliases = aliasTable_addMustAlias (utab->aliases, al, s); | |
4949 | } | |
4950 | } | |
4951 | else | |
4952 | { | |
4953 | ; | |
4954 | } | |
4955 | } | |
4956 | ||
4957 | /* | |
4958 | ** Same as usymtab_addMustAlias, except does not check sRef_isSimilar. | |
4959 | */ | |
4960 | ||
4961 | void usymtab_addForceMustAlias (sRef s, sRef al) | |
4962 | /*@modifies utab@*/ | |
4963 | { | |
4964 | if (sRef_isMeaningful (s) | |
4965 | && sRef_isMeaningful (al) | |
4966 | && !(sRef_isConst (s) || sRef_isConst (al)) | |
4967 | && !(sRef_isAddress (al) && sRef_isDirectParam (sRef_getBase (al)))) | |
4968 | { | |
4969 | utab->aliases = aliasTable_addMustAlias (utab->aliases, s, al); | |
4970 | DPRINTF (("Must alias: %s", aliasTable_unparse (utab->aliases))); | |
4971 | ||
4972 | /* | |
4973 | ** for local variable, aliasing is symmetric | |
4974 | */ | |
4975 | ||
4976 | if (sRef_isLocalVar (s) && sRef_isLocalVar (al)) | |
4977 | { | |
4978 | utab->aliases = aliasTable_addMustAlias (utab->aliases, al, s); | |
4979 | } | |
4980 | } | |
4981 | else | |
4982 | { | |
4983 | ; | |
4984 | } | |
4985 | } | |
4986 | ||
4987 | void usymtab_clearAlias (sRef s) | |
4988 | /*@modifies utab, s@*/ | |
4989 | { | |
4990 | ||
4991 | aliasTable_clearAliases (utab->aliases, s); | |
4992 | } | |
4993 | ||
4994 | sRefSet usymtab_allAliases (sRef s) | |
4995 | /*@globals utab@*/ | |
4996 | { | |
4997 | if (sRef_isMeaningful (s)) | |
4998 | { | |
4999 | sRefSet ret; | |
5000 | ||
5001 | ||
5002 | ret = sRefSet_unionFree (aliasTable_aliasedBy (utab->aliases, s), | |
5003 | aliasTable_canAlias (utab->aliases, s)); | |
5004 | return (ret); | |
5005 | } | |
5006 | else | |
5007 | { | |
5008 | return sRefSet_undefined; | |
5009 | } | |
5010 | } | |
5011 | ||
5012 | /*@only@*/ sRefSet usymtab_canAlias (sRef s) | |
5013 | /*@globals utab@*/ | |
5014 | { | |
5015 | if (sRef_isMeaningful (s)) | |
5016 | { | |
5017 | sRefSet res = aliasTable_canAlias (utab->aliases, s); | |
5018 | ||
5019 | return res; | |
5020 | } | |
5021 | ||
5022 | return sRefSet_undefined; | |
5023 | } | |
5024 | ||
5025 | /*@only@*/ sRefSet usymtab_aliasedBy (sRef s) | |
5026 | /*@globals utab@*/ | |
5027 | { | |
5028 | return (aliasTable_aliasedBy (utab->aliases, s)); | |
5029 | } | |
5030 | ||
5031 | /*@only@*/ cstring usymtab_unparseAliases () | |
5032 | /*@globals utab@*/ | |
5033 | { | |
5034 | return (aliasTable_unparse (utab->aliases)); | |
5035 | } | |
5036 | ||
5037 | /* | |
5038 | ** Debugging routines: | |
5039 | ** okay to leak storage here, only for debugging | |
5040 | */ | |
5041 | ||
5042 | /*@-mustfree@*/ | |
5043 | ||
5044 | void | |
5045 | usymtab_printOut (void) | |
5046 | /*@globals utab@*/ | |
5047 | { | |
5048 | int i; | |
5049 | usymtab s = utab; | |
5050 | int depth = 0; | |
5051 | char *ind = mstring_copy (" "); | |
5052 | ||
5053 | fprintf (g_msgstream, "<<< [symbol table] >>>\n"); | |
5054 | ||
5055 | while (s != GLOBAL_ENV && s->env != GLOBAL_ENV) | |
5056 | { | |
5057 | cstring tname = usymtab_typeName (s); | |
5058 | ||
5059 | if (depth < 5) | |
5060 | { | |
5061 | ind[depth * 3 + 1] = '\0'; | |
5062 | } | |
5063 | ||
5064 | fprintf (g_msgstream, "level: %d (%s)\n", s->lexlevel, | |
5065 | cstring_toCharsSafe (tname)); | |
5066 | ||
5067 | cstring_free (tname); | |
5068 | ||
5069 | for (i = 0; i < s->nentries; i++) | |
5070 | { | |
5071 | cstring us = uentry_unparseFull (s->entries[i]); | |
5072 | fprintf (g_msgstream, "%s\n", cstring_toCharsSafe (us)); | |
5073 | cstring_free (us); | |
5074 | } | |
5075 | ||
5076 | if (s->reftable != NULL && s->nentries > 0) | |
5077 | { | |
5078 | fprintf (g_msgstream, "\t<< Ref table >>\n"); | |
5079 | ||
5080 | for (i = 0; i < s->nentries; i++) | |
5081 | { | |
5082 | fprintf (g_msgstream, "\t%s %3d: %d, %d\n", ind, i, | |
5083 | s->reftable[i]->level, | |
5084 | s->reftable[i]->index); | |
5085 | } | |
5086 | } | |
5087 | ||
5088 | ind[depth * 3 + 1] = ' '; | |
5089 | depth++; | |
5090 | s = s->env; | |
5091 | } | |
5092 | fprintf (g_msgstream, "<<< end usymtab >>>\n"); | |
5093 | mstring_free (ind); | |
5094 | return; | |
5095 | } | |
5096 | ||
5097 | void | |
5098 | usymtab_printTypes () | |
5099 | /*@globals globtab@*/ | |
5100 | { | |
5101 | usymtab_printAllAux (globtab); | |
5102 | } | |
5103 | ||
5104 | void | |
5105 | usymtab_printAll (void) | |
5106 | /*@globals utab@*/ | |
5107 | { | |
5108 | usymtab_printAllAux (utab); | |
5109 | } | |
5110 | ||
5111 | static void | |
5112 | usymtab_printAllAux (usymtab s) | |
5113 | /*@modifies g_msgstream@*/ | |
5114 | { | |
5115 | int i; | |
5116 | int depth = 0; | |
5117 | char *ind = mstring_copy (" "); | |
5118 | ||
5119 | printf ("[[[ usymtab ]]]"); | |
5120 | ||
5121 | while (s != GLOBAL_ENV) | |
5122 | { | |
5123 | if (depth < 5) | |
5124 | ind[depth * 3 + 1] = '\0'; | |
5125 | ||
5126 | if (s->env == GLOBAL_ENV) | |
5127 | { | |
5128 | int looplow; | |
5129 | ||
5130 | printf ("level: %d / break: %s / exit: %s\n", s->lexlevel, | |
5131 | cstring_toCharsSafe (bool_unparse (s->mustBreak)), | |
5132 | cstring_toCharsSafe (exitkind_unparse (s->exitCode))); | |
5133 | ||
5134 | looplow = 0; | |
5135 | ||
5136 | for (i = looplow; i < s->nentries; i++) | |
5137 | { | |
5138 | printf ("%s%3d. %s\n", ind, i, | |
5139 | cstring_toCharsSafe (uentry_unparseFull (s->entries[i]))); | |
5140 | } | |
5141 | } | |
5142 | else | |
5143 | { | |
5144 | printf ("level: %d / break: %s / exit: %s\n", s->lexlevel, | |
5145 | cstring_toCharsSafe (bool_unparse (s->mustBreak)), | |
5146 | cstring_toCharsSafe (exitkind_unparse (s->exitCode))); | |
5147 | ||
5148 | for (i = 0; i < s->nentries; i++) | |
5149 | { | |
5150 | printf ("%s%3d %s\n", ind, i, | |
5151 | cstring_toCharsSafe (uentry_unparseFull (s->entries[i]))); | |
5152 | } | |
5153 | } | |
5154 | ||
5155 | ind[depth * 3 + 1] = ' '; | |
5156 | depth++; | |
5157 | s = s->env; | |
5158 | } | |
5159 | printf ("----------\n"); | |
5160 | } | |
5161 | ||
5162 | void | |
5163 | usymtab_printComplete () | |
5164 | /*@globals utab@*/ | |
5165 | { | |
5166 | int i; | |
5167 | int depth = 0; | |
5168 | char *ind = mstring_copy (" "); | |
5169 | usymtab s = utab; | |
5170 | ||
5171 | while (s != GLOBAL_ENV) | |
5172 | { | |
5173 | if (depth < 5) | |
5174 | { | |
5175 | ind[depth * 3 + 1] = '\0'; | |
5176 | } | |
5177 | ||
5178 | if (s->env == GLOBAL_ENV) | |
5179 | { | |
5180 | int looplow; | |
5181 | ||
5182 | printf ("level: %d\n", s->lexlevel); | |
5183 | ||
5184 | looplow = 0; | |
5185 | ||
5186 | for (i = looplow; i < s->nentries; i++) | |
5187 | { | |
5188 | printf ("%s%3d %s\n", ind, i, | |
5189 | cstring_toCharsSafe (uentry_unparse (s->entries[i]))); | |
5190 | } | |
5191 | } | |
5192 | else | |
5193 | { | |
5194 | printf ("level: %d\n", s->lexlevel); | |
5195 | for (i = 0; i < s->nentries; i++) | |
5196 | { | |
5197 | printf ("%s%3d %s\n", ind, i, | |
5198 | cstring_toCharsSafe (uentry_unparse (s->entries[i]))); | |
5199 | } | |
5200 | } | |
5201 | ||
5202 | ind[depth * 3 + 1] = ' '; | |
5203 | depth++; | |
5204 | s = s->env; | |
5205 | } | |
5206 | ||
5207 | printf ("----------\n"); | |
5208 | mstring_free (ind); | |
5209 | } | |
5210 | ||
5211 | static /*@only@*/ cstring /*@unused@*/ | |
5212 | usymtab_unparseLocalAux (/*@notnull@*/ usymtab s) | |
5213 | { | |
5214 | cstring c = message ("lexlevel: %d\n", s->lexlevel); | |
5215 | int i; | |
5216 | ||
5217 | for (i = 0; i < s->nentries; i++) | |
5218 | { | |
5219 | c = message ("%q\n%q", c, uentry_unparseFull (s->entries[i])); | |
5220 | } | |
5221 | ||
5222 | c = message ("%q\n=========", c); | |
5223 | return (c); | |
5224 | } | |
5225 | ||
5226 | static cstring /*@unused@*/ /*@only@*/ | |
5227 | usymtab_unparseLocalList (/*@notnull@*/ usymtab s) | |
5228 | { | |
5229 | cstring c = message ("[%d/%s/%s] ", s->lexlevel, | |
5230 | bool_unparse (s->mustBreak), | |
5231 | exitkind_unparse (s->exitCode)); | |
5232 | int i; | |
5233 | ||
5234 | for (i = 0; i < s->nentries; i++) | |
5235 | { | |
5236 | sRef sr = uentry_getSref (s->entries[i]); | |
5237 | ||
5238 | if (i == 0) | |
5239 | { | |
5240 | c = message ("%q: %q [%b]", c, uentry_getName (s->entries[i]), | |
5241 | sRef_isStateDefined (sr)); | |
5242 | } | |
5243 | else | |
5244 | { | |
5245 | c = message ("%q, %q [%b]", c, uentry_getName (s->entries[i]), | |
5246 | sRef_isStateDefined (sr)); | |
5247 | } | |
5248 | ||
5249 | } | |
5250 | ||
5251 | return (c); | |
5252 | } | |
5253 | ||
5254 | void | |
5255 | usymtab_printLocal (void) | |
5256 | /*@globals utab@*/ | |
5257 | { | |
5258 | int i; | |
5259 | usymtab s = utab; | |
5260 | ||
5261 | printf ("lexlevel: %d\n", s->lexlevel); | |
5262 | ||
5263 | for (i = 0; i < s->nentries; i++) | |
5264 | { | |
5265 | printf ("%s\n", cstring_toCharsSafe (uentry_unparseFull (s->entries[i]))); | |
5266 | } | |
5267 | ||
5268 | while (s->lexlevel > 1) | |
5269 | { | |
5270 | s = s->env; | |
5271 | } | |
5272 | ||
5273 | llassert (usymtab_isDefined (s)); | |
5274 | ||
5275 | printf ("Params:\n"); | |
5276 | ||
5277 | for (i = 0; i < s->nentries; i++) | |
5278 | { | |
5279 | printf ("%d: %s\n", i, | |
5280 | cstring_toCharsSafe (uentry_unparseFull (s->entries[i]))); | |
5281 | } | |
5282 | } | |
5283 | /*@=mustfree@*/ | |
5284 | ||
5285 | static bool checkDistinctExternalName (uentry e) | |
5286 | /*@globals globtab@*/ | |
5287 | /*@modifies *g_msgstream@*/ | |
5288 | { | |
5289 | int checklen = context_getValue (FLG_EXTERNALNAMELEN); | |
5290 | bool ignorecase = context_getFlag (FLG_EXTERNALNAMECASEINSENSITIVE); | |
5291 | bool gotone = FALSE; | |
5292 | bool extras = FALSE; | |
5293 | bool hasError = FALSE; | |
5294 | cstring name = uentry_rawName (e); | |
5295 | usymtab st = globtab; | |
5296 | ||
5297 | if (checklen == 0) | |
5298 | { | |
5299 | ; | |
5300 | } | |
5301 | else | |
5302 | { | |
5303 | if (uentry_isAnyTag (e)) | |
5304 | { | |
5305 | checklen++; /* the tag marker doesn't count */ | |
5306 | } | |
5307 | } | |
5308 | ||
5309 | usymtab_entries (st, oe) | |
5310 | { | |
5311 | if (uentry_sameObject (oe, e)) | |
5312 | { | |
5313 | continue; | |
5314 | } | |
5315 | ||
5316 | if (checklen == 0) | |
5317 | { | |
5318 | if (cstring_equalCaseInsensitive (uentry_rawName (oe), name)) | |
5319 | { | |
5320 | if (gotone) | |
5321 | { | |
5322 | extras = TRUE; | |
5323 | break; | |
5324 | } | |
5325 | ||
5326 | if (optgenerror | |
5327 | (FLG_DISTINCTEXTERNALNAMES, | |
5328 | message | |
5329 | ("External identifier %q is not distinguishable from %q " | |
5330 | "because alphabetical case is ignored", | |
5331 | uentry_getName (e), | |
5332 | uentry_getName (oe)), | |
5333 | uentry_whereLast (e))) | |
5334 | { | |
5335 | uentry_showWhereAny (oe); | |
5336 | uentry_setHasNameError (oe); | |
5337 | gotone = TRUE; | |
5338 | } | |
5339 | } | |
5340 | } | |
5341 | else | |
5342 | { | |
5343 | if (ignorecase) | |
5344 | { | |
5345 | if (cstring_equalLenCaseInsensitive (uentry_rawName (oe), | |
5346 | name, checklen)) | |
5347 | { | |
5348 | if (gotone) | |
5349 | { | |
5350 | extras = TRUE; | |
5351 | break; | |
5352 | } | |
5353 | ||
5354 | if (cstring_equalLen (uentry_rawName (oe), name, checklen)) | |
5355 | { | |
5356 | if (optgenerror | |
5357 | (FLG_DISTINCTEXTERNALNAMES, | |
5358 | /*@-sefparams@*/ | |
5359 | message | |
5360 | ("External identifier %q is not distinguishable from %q " | |
5361 | "in the first %d characters (%q)", | |
5362 | uentry_getName (e), | |
5363 | uentry_getName (oe), | |
5364 | checklen, | |
5365 | cstring_clip (uentry_getName (e), checklen)), | |
5366 | /*@=sefparams@*/ | |
5367 | uentry_whereLast (e))) | |
5368 | { | |
5369 | uentry_showWhereAny (oe); | |
5370 | uentry_setHasNameError (oe); | |
5371 | gotone = TRUE; | |
5372 | } | |
5373 | } | |
5374 | else | |
5375 | { | |
5376 | if (gotone) | |
5377 | { | |
5378 | extras = TRUE; | |
5379 | break; | |
5380 | } | |
5381 | ||
5382 | if (optgenerror | |
5383 | (FLG_DISTINCTEXTERNALNAMES, | |
5384 | message | |
5385 | ("External identifier %q is not distinguishable from %q " | |
5386 | "in the first %d characters because alphabetical case " | |
5387 | "is ignored", | |
5388 | uentry_getName (e), | |
5389 | uentry_getName (oe), | |
5390 | checklen), | |
5391 | uentry_whereLast (e))) | |
5392 | { | |
5393 | uentry_showWhereAny (oe); | |
5394 | uentry_setHasNameError (oe); | |
5395 | gotone = TRUE; | |
5396 | } | |
5397 | } | |
5398 | } | |
5399 | } | |
5400 | else if (cstring_equalLen (uentry_rawName (oe), name, checklen)) | |
5401 | { | |
5402 | if (gotone) | |
5403 | { | |
5404 | extras = TRUE; | |
5405 | break; | |
5406 | } | |
5407 | ||
5408 | if (optgenerror | |
5409 | (FLG_DISTINCTEXTERNALNAMES, | |
5410 | /*@-sefparams@*/ | |
5411 | message | |
5412 | ("External identifier %q is not distinguishable from %q " | |
5413 | "in the first %d characters (%q)", | |
5414 | uentry_getName (e), | |
5415 | uentry_getName (oe), | |
5416 | checklen, | |
5417 | cstring_clip (uentry_getName (e), checklen)), | |
5418 | /*@=sefparams@*/ | |
5419 | uentry_whereLast (e))) | |
5420 | { | |
5421 | uentry_showWhereAny (oe); | |
5422 | uentry_setHasNameError (oe); | |
5423 | gotone = TRUE; | |
5424 | } | |
5425 | } | |
5426 | else | |
5427 | { | |
5428 | ; /* okay */ | |
5429 | } | |
5430 | } | |
5431 | } end_usymtab_entries ; | |
5432 | ||
5433 | hasError = gotone; | |
5434 | ||
5435 | if (extras) | |
5436 | { | |
5437 | llgenindentmsgnoloc | |
5438 | (cstring_makeLiteral ("One or more additional " | |
5439 | "indistinguishable external " | |
5440 | "names not reported")); | |
5441 | } | |
5442 | ||
5443 | return hasError; | |
5444 | } | |
5445 | ||
5446 | static bool checkDistinctInternalName (uentry e) | |
5447 | /*@globals utab@*/ | |
5448 | /*@modifies *g_msgstream@*/ | |
5449 | { | |
5450 | usymtab ttab = utab; | |
5451 | cstring name = uentry_rawName (e); | |
5452 | int numchars = context_getValue (FLG_INTERNALNAMELEN); | |
5453 | bool caseinsensitive = context_getFlag (FLG_INTERNALNAMECASEINSENSITIVE); | |
5454 | bool lookalike = context_getFlag (FLG_INTERNALNAMELOOKALIKE); | |
5455 | ||
5456 | if (uentry_isAnyTag (e) && (numchars != 0)) | |
5457 | { | |
5458 | numchars++; /* the tag marker doesn't count */ | |
5459 | } | |
5460 | ||
5461 | while (usymtab_isDefined (ttab)) | |
5462 | { | |
5463 | usymtab_entries (ttab, oe) | |
5464 | { | |
5465 | if (uentry_sameObject (oe, e)) | |
5466 | { | |
5467 | /*@innercontinue@*/ continue; | |
5468 | } | |
5469 | ||
5470 | switch (cstring_genericEqual | |
5471 | (name, uentry_rawName (oe), | |
5472 | numchars, caseinsensitive, lookalike)) | |
5473 | { | |
5474 | case CGE_DISTINCT: /* okay */ | |
5475 | /*@switchbreak@*/ | |
5476 | break; | |
5477 | case CGE_SAME: | |
5478 | if (cstring_equal (name, uentry_rawName (oe))) | |
5479 | { | |
5480 | ; /* got a shadow error */ | |
5481 | } | |
5482 | else | |
5483 | { | |
5484 | if (optgenerror | |
5485 | (FLG_DISTINCTINTERNALNAMES, | |
5486 | /*@-sefparams@*/ | |
5487 | message | |
5488 | ("Internal identifier %q is not distinguishable from %q " | |
5489 | "in the first %d characters (%q)", | |
5490 | uentry_getName (e), | |
5491 | uentry_getName (oe), | |
5492 | numchars, | |
5493 | cstring_clip (uentry_getName (e), numchars)), | |
5494 | /*@=sefparams@*/ | |
5495 | uentry_whereLast (e))) | |
5496 | { | |
5497 | uentry_showWhereAny (oe); | |
5498 | uentry_setHasNameError (oe); | |
5499 | return TRUE; | |
5500 | } | |
5501 | } | |
5502 | /*@switchbreak@*/ | |
5503 | break; | |
5504 | case CGE_CASE: | |
5505 | if (numchars == 0 | |
5506 | || (cstring_length (name) <= numchars)) | |
5507 | { | |
5508 | if (optgenerror | |
5509 | (FLG_DISTINCTINTERNALNAMES, | |
5510 | message | |
5511 | ("Internal identifier %q is not distinguishable from %q " | |
5512 | "without case sensitivity", | |
5513 | uentry_getName (e), | |
5514 | uentry_getName (oe)), | |
5515 | uentry_whereLast (e))) | |
5516 | { | |
5517 | uentry_showWhereAny (oe); | |
5518 | uentry_setHasNameError (oe); | |
5519 | return TRUE; | |
5520 | } | |
5521 | } | |
5522 | else | |
5523 | { | |
5524 | if (optgenerror | |
5525 | (FLG_DISTINCTINTERNALNAMES, | |
5526 | message | |
5527 | ("Internal identifier %q is not distinguishable from %q " | |
5528 | "in the first %d characters without case sensitivity", | |
5529 | uentry_getName (e), | |
5530 | uentry_getName (oe), | |
5531 | numchars), | |
5532 | uentry_whereLast (e))) | |
5533 | { | |
5534 | uentry_showWhereAny (oe); | |
5535 | uentry_setHasNameError (oe); | |
5536 | return TRUE; | |
5537 | } | |
5538 | } | |
5539 | /*@switchbreak@*/ | |
5540 | break; | |
5541 | case CGE_LOOKALIKE: | |
5542 | if (numchars == 0 | |
5543 | || (cstring_length (name) <= numchars)) | |
5544 | { | |
5545 | if (optgenerror | |
5546 | (FLG_DISTINCTINTERNALNAMES, | |
5547 | message | |
5548 | ("Internal identifier %q is not distinguishable from %q " | |
5549 | "except by lookalike characters", | |
5550 | uentry_getName (e), | |
5551 | uentry_getName (oe)), | |
5552 | uentry_whereLast (e))) | |
5553 | { | |
5554 | uentry_showWhereAny (oe); | |
5555 | uentry_setHasNameError (oe); | |
5556 | return TRUE; | |
5557 | } | |
5558 | } | |
5559 | else | |
5560 | { | |
5561 | if (optgenerror | |
5562 | (FLG_DISTINCTINTERNALNAMES, | |
5563 | message | |
5564 | ("Internal identifier %q is not distinguishable from %q " | |
5565 | "in the first %d characters except by lookalike characters", | |
5566 | uentry_getName (e), | |
5567 | uentry_getName (oe), | |
5568 | numchars), | |
5569 | uentry_whereLast (e))) | |
5570 | { | |
5571 | uentry_showWhereAny (oe); | |
5572 | uentry_setHasNameError (oe); | |
5573 | return TRUE; | |
5574 | } | |
5575 | } | |
5576 | } | |
5577 | } end_usymtab_entries ; | |
5578 | ||
5579 | ttab = ttab->env; | |
5580 | } | |
5581 | ||
5582 | return FALSE; | |
5583 | } | |
5584 | ||
5585 | void usymtab_checkDistinctName (uentry e, int scope) | |
5586 | /*@globals utab, globtab@*/ | |
5587 | { | |
5588 | bool hasError = FALSE; | |
5589 | fileloc where = uentry_whereLast (e); | |
5590 | ||
5591 | if (!fileloc_isPreproc (where) && !fileloc_isBuiltin (where)) | |
5592 | { | |
5593 | if (scope == globScope) | |
5594 | { | |
5595 | if (context_getFlag (FLG_DISTINCTEXTERNALNAMES)) | |
5596 | { | |
5597 | hasError = checkDistinctExternalName (e); | |
5598 | } | |
5599 | } | |
5600 | ||
5601 | if (!hasError && context_getFlag (FLG_DISTINCTINTERNALNAMES)) | |
5602 | { | |
5603 | hasError = checkDistinctInternalName (e); | |
5604 | } | |
5605 | } | |
5606 | ||
5607 | if (hasError) | |
5608 | { | |
5609 | uentry_setHasNameError (e); | |
5610 | } | |
5611 | } | |
5612 |