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616915dd | 1 | /* |
2 | ** LCLint - annotation-assisted static program checker | |
28bf4b0b | 3 | ** Copyright (C) 1994-2001 University of Virginia, |
616915dd | 4 | ** Massachusetts Institute of Technology |
5 | ** | |
6 | ** This program is free software; you can redistribute it and/or modify it | |
7 | ** under the terms of the GNU General Public License as published by the | |
8 | ** Free Software Foundation; either version 2 of the License, or (at your | |
9 | ** option) any later version. | |
10 | ** | |
11 | ** This program is distributed in the hope that it will be useful, but | |
12 | ** WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | ** General Public License for more details. | |
15 | ** | |
16 | ** The GNU General Public License is available from http://www.gnu.org/ or | |
17 | ** the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, | |
18 | ** MA 02111-1307, USA. | |
19 | ** | |
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 | ** exprNode.c | |
26 | */ | |
27 | ||
28 | # include <ctype.h> /* for isdigit */ | |
29 | # include "lclintMacros.nf" | |
30 | # include "basic.h" | |
3120b462 | 31 | # include "mtincludes.h" |
616915dd | 32 | # include "cgrammar.h" |
33 | # include "cgrammar_tokens.h" | |
34 | ||
35 | # include "exprChecks.h" | |
28bf4b0b | 36 | # include "transferChecks.h" |
616915dd | 37 | # include "exprNodeSList.h" |
616915dd | 38 | |
39 | static bool exprNode_isEmptyStatement (exprNode p_e); | |
40 | static /*@exposed@*/ exprNode exprNode_firstStatement (/*@returned@*/ exprNode p_e); | |
41 | static bool exprNode_isFalseConstant (exprNode p_e) /*@*/ ; | |
42 | static bool exprNode_isBlock (exprNode p_e); | |
43 | static void checkGlobUse (uentry p_glob, bool p_isCall, /*@notnull@*/ exprNode p_e); | |
28bf4b0b | 44 | static void exprNode_addUse (exprNode p_e, /*@exposed@*/ sRef p_s); |
616915dd | 45 | static bool exprNode_matchArgType (ctype p_ct, exprNode p_e); |
28bf4b0b | 46 | static exprNode exprNode_fakeCopy (exprNode p_e) /*@*/ ; |
616915dd | 47 | static exprNode exprNode_statementError (/*@only@*/ exprNode p_e, /*@only@*/ lltok p_t); |
48 | static bool exprNode_matchTypes (exprNode p_e1, exprNode p_e2); | |
49 | static void checkUniqueParams (exprNode p_fcn, | |
50 | /*@notnull@*/ exprNode p_current, exprNodeList p_args, | |
51 | int p_paramno, uentry p_ucurrent); | |
52 | static void updateAliases (/*@notnull@*/ exprNode p_e1, /*@notnull@*/ exprNode p_e2); | |
53 | static void abstractOpError (ctype p_tr1, ctype p_tr2, lltok p_op, | |
54 | /*@notnull@*/ exprNode p_e1, /*@notnull@*/ exprNode p_e2, | |
55 | fileloc p_loc1, fileloc p_loc2); | |
56 | static ctype checkNumerics (ctype p_tr1, ctype p_tr2, ctype p_te1, ctype p_te2, | |
57 | /*@notnull@*/ exprNode p_e1, /*@notnull@*/ exprNode p_e2, lltok p_op); | |
58 | static void doAssign (/*@notnull@*/ exprNode p_e1, /*@notnull@*/ exprNode p_e2, bool p_isInit); | |
28bf4b0b | 59 | static void checkSafeUse (exprNode p_e, /*@exposed@*/ sRef p_s); |
616915dd | 60 | static void reflectNullTest (/*@notnull@*/ exprNode p_e, bool p_isnull); |
61 | static void checkMacroParen (exprNode p_e); | |
62 | static exprNodeSList exprNode_flatten (/*@dependent@*/ exprNode p_e); | |
63 | static void exprNode_checkSetAny (exprNode p_e, /*@dependent@*/ cstring p_name); | |
28bf4b0b | 64 | static void exprNode_checkUse (exprNode p_e, /*@exposed@*/ sRef p_s, fileloc p_loc); |
616915dd | 65 | static void exprNode_mergeUSs (exprNode p_res, exprNode p_other); |
66 | static void exprNode_mergeCondUSs (exprNode p_res, exprNode p_other1, exprNode p_other2); | |
67 | static /*@only@*/ /*@notnull@*/ exprNode exprNode_fromIdentifierAux (/*@observer@*/ uentry p_c); | |
68 | static void checkAnyCall (/*@notnull@*/ /*@dependent@*/ exprNode p_fcn, | |
69 | /*@dependent@*/ cstring p_fname, | |
70 | uentryList p_pn, exprNodeList p_args, | |
71 | bool p_hasMods, sRefSet p_mods, bool p_isSpec, | |
72 | int p_specialArgs); | |
73 | static void checkOneArg (uentry p_ucurrent, /*@notnull@*/ exprNode p_current, | |
74 | /*@dependent@*/ exprNode p_fcn, bool p_isSpec, int p_argno, int p_totargs); | |
75 | static void | |
76 | checkUnspecCall (/*@notnull@*/ /*@dependent@*/ exprNode p_fcn, uentryList p_params, exprNodeList p_args); | |
77 | ||
78 | static /*@only@*/ exprNode exprNode_effect (exprNode p_e) | |
79 | /*@globals internalState@*/ ; | |
80 | static /*@only@*/ cstring exprNode_doUnparse (exprNode p_e); | |
81 | static /*@observer@*/ cstring exprNode_rootVarName (exprNode p_e); | |
82 | static /*@exposed@*/ exprNode | |
83 | exprNode_lastStatement (/*@returned@*/ exprNode p_e); | |
84 | ||
85 | static /*@null@*/ sRef defref = sRef_undefined; | |
86 | static /*@only@*/ exprNode mustExitNode = exprNode_undefined; | |
87 | ||
88 | static int checkArgsReal (uentry p_fcn, /*@dependent@*/ exprNode p_f, | |
89 | uentryList p_cl, | |
90 | exprNodeList p_args, bool p_isIter, exprNode p_ret); | |
91 | ||
92 | static bool inEffect = FALSE; | |
93 | static int nowalloc = 0; | |
94 | static int totalloc = 0; | |
95 | static int maxalloc = 0; | |
96 | ||
97 | static /*@only@*/ uentry regArg; | |
98 | static /*@only@*/ uentry outArg; | |
99 | static /*@only@*/ uentry outStringArg; | |
100 | static /*@exposed@*/ sRef stdinRef; | |
101 | static /*@exposed@*/ sRef stdoutRef; | |
102 | static /*@only@*/ uentry csArg; | |
103 | static /*@only@*/ uentry csOnlyArg; | |
104 | static ctype cstringType; | |
105 | static ctype ctypeType; | |
106 | static ctype filelocType; | |
107 | static bool initMod = FALSE; | |
108 | ||
08eb3d0e | 109 | static void exprNode_defineConstraints(/*@sef@*/ /*@special@*/ /*@notnull@*/ exprNode e) |
110 | /*@defines e->requiresConstraints, e->ensuresConstraints, | |
111 | e->trueEnsuresConstraints, e->falseEnsuresConstraints @*/ | |
112 | { | |
113 | e->requiresConstraints = constraintList_makeNew (); | |
114 | e->ensuresConstraints = constraintList_makeNew (); | |
115 | e->trueEnsuresConstraints = constraintList_makeNew (); | |
116 | e->falseEnsuresConstraints = constraintList_makeNew (); | |
117 | } | |
84c9ffbf | 118 | |
616915dd | 119 | /* |
120 | ** must occur after library has been read | |
121 | */ | |
122 | ||
123 | void exprNode_initMod (void) | |
124 | /*@globals undef regArg, undef outArg, undef outStringArg, | |
125 | undef csOnlyArg, undef csArg; | |
126 | @*/ | |
127 | { | |
128 | uentry ue; | |
129 | idDecl tmp; | |
130 | ||
131 | initMod = TRUE; | |
132 | cstringType = ctype_unknown; | |
133 | ctypeType = ctype_unknown; | |
134 | filelocType = ctype_unknown; | |
135 | ||
136 | defref = sRef_undefined; | |
137 | ||
138 | if (usymtab_existsType (cstring_makeLiteralTemp ("cstring"))) | |
139 | { | |
140 | cstringType = usymtab_lookupAbstractType (cstring_makeLiteralTemp ("cstring")); | |
141 | } | |
142 | ||
143 | if (usymtab_existsType (cstring_makeLiteralTemp ("ctype"))) | |
144 | { | |
145 | ctypeType = usymtab_lookupAbstractType (cstring_makeLiteralTemp ("ctype")); | |
146 | } | |
147 | ||
148 | if (usymtab_existsType (cstring_makeLiteralTemp ("fileloc"))) | |
149 | { | |
150 | filelocType = usymtab_lookupAbstractType (cstring_makeLiteralTemp ("fileloc")); | |
151 | } | |
152 | ||
153 | if (usymtab_existsGlob (cstring_makeLiteralTemp ("stdin"))) | |
154 | { | |
155 | ue = usymtab_lookupGlob (cstring_makeLiteralTemp ("stdin")); | |
156 | } | |
157 | else /* define stdin */ | |
158 | { | |
159 | ue = uentry_makeVariable (cstring_makeLiteralTemp ("stdin"), | |
160 | ctype_unknown, | |
161 | fileloc_getBuiltin (), | |
162 | FALSE); | |
163 | uentry_setHasNameError (ue); | |
164 | ue = usymtab_supGlobalEntryReturn (ue); | |
165 | } | |
166 | ||
167 | stdinRef = sRef_makePointer (uentry_getSref (ue)); | |
168 | ||
169 | if (usymtab_existsGlob (cstring_makeLiteralTemp ("stdout"))) | |
170 | { | |
171 | ue = usymtab_lookupGlob (cstring_makeLiteralTemp ("stdout")); | |
172 | } | |
173 | else | |
174 | { | |
175 | ue = uentry_makeVariable (cstring_makeLiteralTemp ("stdout"), | |
176 | ctype_unknown, | |
177 | fileloc_getBuiltin (), | |
178 | FALSE); | |
179 | uentry_setHasNameError (ue); | |
180 | ue = usymtab_supGlobalEntryReturn (ue); | |
181 | } | |
182 | ||
183 | stdoutRef = sRef_makePointer (uentry_getSref (ue)); | |
184 | ||
185 | tmp = idDecl_create (cstring_undefined, qtype_create (ctype_unknown)); | |
186 | ||
187 | regArg = uentry_makeParam (tmp, PARAMUNKNOWN); | |
188 | ||
189 | idDecl_setTyp (tmp, | |
190 | qtype_addQual (qtype_create (ctype_makePointer (ctype_unknown)), | |
191 | qual_createOut ())); | |
192 | ||
193 | outArg = uentry_makeParam (tmp, PARAMUNKNOWN); | |
194 | ||
195 | idDecl_setTyp (tmp, qtype_addQual (qtype_create (ctype_string), | |
196 | qual_createOut ())); | |
197 | ||
198 | outStringArg = uentry_makeParam (tmp, PARAMUNKNOWN); | |
199 | ||
200 | idDecl_setTyp (tmp, qtype_addQual (qtype_addQual (qtype_create (cstringType), | |
201 | qual_createOnly ()), | |
202 | qual_createNull ())); | |
203 | ||
204 | csOnlyArg = uentry_makeParam (tmp, PARAMUNKNOWN); | |
205 | ||
206 | idDecl_setTyp (tmp, qtype_addQual (qtype_create (cstringType), qual_createNull ())); | |
207 | csArg = uentry_makeParam (tmp, PARAMUNKNOWN); | |
208 | ||
209 | idDecl_free (tmp); | |
210 | } | |
211 | ||
212 | void | |
213 | exprNode_destroyMod (void) | |
214 | /*@globals killed regArg, killed outArg, killed outStringArg, | |
215 | killed mustExitNode, initMod @*/ | |
216 | { | |
217 | if (initMod) | |
218 | { | |
219 | uentry_free (regArg); | |
220 | uentry_free (outArg); | |
221 | uentry_free (outStringArg); | |
222 | ||
223 | exprNode_free (mustExitNode); | |
224 | initMod = FALSE; | |
225 | /*@-branchstate@*/ | |
226 | } | |
227 | /*@=branchstate@*/ | |
228 | } | |
229 | ||
230 | static void exprNode_resetSref (/*@notnull@*/ exprNode e) | |
231 | { | |
232 | e->sref = defref; | |
233 | } | |
234 | ||
28bf4b0b | 235 | exprNode exprNode_fakeCopy (exprNode e) |
236 | { | |
237 | /*@-temptrans@*/ /*@-retalias@*/ | |
238 | return e; | |
239 | /*@=temptrans@*/ /*@=retalias@*/ | |
240 | } | |
241 | ||
616915dd | 242 | static bool isFlagKey (char key) |
243 | { | |
244 | return (key == '-' || key == '+' || key == ' ' || key == '#'); | |
245 | } | |
246 | ||
247 | static void exprNode_combineControl (/*@notnull@*/ exprNode ret, | |
248 | /*@notnull@*/ exprNode ifclause, | |
249 | /*@notnull@*/ exprNode elseclause) | |
250 | { | |
251 | ret->canBreak = ifclause->canBreak || elseclause->canBreak; | |
252 | ||
253 | ret->mustBreak = | |
254 | (ifclause->mustBreak || exprNode_mustEscape (ifclause)) | |
255 | && (elseclause->mustBreak || exprNode_mustEscape (elseclause)); | |
256 | ||
257 | ret->exitCode = exitkind_combine (ifclause->exitCode, | |
258 | elseclause->exitCode); | |
259 | ||
260 | } | |
261 | ||
262 | /* | |
263 | ** For exprNode's returned by exprNode_effect. | |
264 | */ | |
265 | ||
266 | static bool shallowKind (exprKind kind) | |
267 | { | |
268 | return (kind == XPR_STRINGLITERAL | |
269 | || kind == XPR_NUMLIT | |
270 | || kind == XPR_EMPTY | |
271 | || kind == XPR_BODY | |
272 | || kind == XPR_NODE); | |
273 | } | |
274 | ||
275 | static void | |
276 | exprNode_freeIniter (/*@only@*/ exprNode e) | |
277 | { | |
278 | if (!exprNode_isError (e)) | |
279 | { | |
280 | switch (e->kind) | |
281 | { | |
282 | case XPR_FACCESS: | |
28bf4b0b | 283 | /* |
284 | ** Its a fake copy, don't free the field->rec and field->field | |
285 | ** fields. | |
286 | */ | |
287 | ||
288 | /*@-compdestroy@*/ | |
616915dd | 289 | sfree (e->edata->field); |
28bf4b0b | 290 | /*@=compdestroy@*/ |
291 | ||
616915dd | 292 | sfree (e->edata); |
293 | break; | |
294 | case XPR_FETCH: | |
295 | exprNode_free (e->edata->op->b); | |
296 | /*@-compdestroy@*/ sfree (e->edata->op); /*@=compdestroy@*/ | |
297 | sfree (e->edata); | |
298 | break; | |
299 | default: | |
300 | llbug (message ("other: %s", exprNode_unparse (e))); | |
301 | } | |
302 | ||
303 | multiVal_free (e->val); | |
304 | cstring_free (e->etext); | |
305 | fileloc_free (e->loc); | |
306 | sRefSet_free (e->uses); | |
307 | sRefSet_free (e->sets); | |
308 | sRefSet_free (e->msets); | |
309 | guardSet_free (e->guards); | |
bb25bea6 | 310 | |
311 | constraintList_free(e->requiresConstraints); | |
312 | constraintList_free(e->ensuresConstraints); | |
313 | constraintList_free(e->trueEnsuresConstraints); | |
314 | constraintList_free(e->falseEnsuresConstraints); | |
315 | ||
316 | e->requiresConstraints = NULL; | |
317 | e->ensuresConstraints = NULL; | |
318 | e->trueEnsuresConstraints = NULL; | |
319 | e->falseEnsuresConstraints = NULL; | |
320 | ||
616915dd | 321 | sfree (e); |
322 | } | |
323 | } | |
324 | ||
325 | void | |
326 | exprNode_freeShallow (/*@only@*/ exprNode e) | |
327 | { | |
328 | if (!exprNode_isError (e)) | |
329 | { | |
330 | if (shallowKind (e->kind)) | |
331 | { | |
332 | } | |
333 | else | |
334 | { | |
335 | if (!inEffect) | |
336 | { | |
337 | if (e->kind == XPR_EMPTY | |
338 | || e->kind == XPR_BODY | |
339 | || e->kind == XPR_STRINGLITERAL | |
340 | || e->kind == XPR_NUMLIT | |
341 | || e->kind == XPR_NODE | |
342 | || e->kind == XPR_OFFSETOF | |
343 | || e->kind == XPR_ALIGNOFT | |
344 | || e->kind == XPR_ALIGNOF | |
345 | || e->kind == XPR_SIZEOFT | |
346 | || e->kind == XPR_SIZEOF) | |
347 | { | |
348 | /* don't free anything */ | |
349 | } | |
350 | else | |
351 | { | |
352 | /* multiVal_free (e->val); */ | |
353 | cstring_free (e->etext); | |
354 | fileloc_free (e->loc); | |
355 | sRefSet_free (e->uses); | |
356 | sRefSet_free (e->sets); | |
357 | sRefSet_free (e->msets); | |
358 | guardSet_free (e->guards); | |
359 | exprData_freeShallow (e->edata, e->kind); | |
360 | nowalloc--; | |
361 | /*@-compdestroy@*/ sfree (e); /*@=compdestroy@*/ | |
362 | /*@-branchstate@*/ | |
363 | } | |
364 | } | |
365 | } /*@=branchstate@*/ | |
366 | } | |
367 | } | |
368 | ||
369 | void | |
370 | exprNode_free (exprNode e) | |
371 | { | |
372 | if (!exprNode_isError (e)) | |
373 | { | |
374 | if (!inEffect) | |
375 | { | |
376 | multiVal_free (e->val); | |
377 | cstring_free (e->etext); | |
378 | fileloc_free (e->loc); | |
379 | sRefSet_free (e->uses); | |
380 | sRefSet_free (e->sets); | |
381 | sRefSet_free (e->msets); | |
382 | guardSet_free (e->guards); | |
383 | exprData_free (e->edata, e->kind); | |
384 | ||
bb25bea6 | 385 | constraintList_free(e->requiresConstraints); |
386 | constraintList_free(e->ensuresConstraints); | |
387 | constraintList_free(e->trueEnsuresConstraints); | |
388 | constraintList_free(e->falseEnsuresConstraints); | |
389 | ||
390 | e->requiresConstraints = NULL; | |
391 | e->ensuresConstraints = NULL; | |
392 | e->trueEnsuresConstraints = NULL; | |
393 | e->falseEnsuresConstraints = NULL; | |
394 | ||
616915dd | 395 | nowalloc--; |
396 | sfree (e); | |
397 | /*@-branchstate@*/ | |
398 | } /*@=branchstate@*/ | |
399 | } | |
400 | } | |
401 | ||
402 | exprNode | |
403 | exprNode_makeError () | |
404 | { | |
405 | return exprNode_undefined; | |
406 | } | |
407 | ||
408 | static /*@out@*/ /*@only@*/ /*@notnull@*/ exprNode | |
409 | exprNode_new (void) | |
410 | { | |
411 | exprNode ret = (exprNode) dmalloc (sizeof (*ret)); | |
412 | /* static int lastexpnodes = 0; */ | |
413 | ||
414 | nowalloc++; | |
415 | totalloc++; | |
416 | ||
417 | if (nowalloc > maxalloc) | |
418 | { | |
419 | maxalloc = nowalloc; | |
420 | } | |
421 | ||
422 | return ret; | |
423 | } | |
424 | ||
425 | static /*@notnull@*/ /*@special@*/ exprNode | |
426 | exprNode_createPlain (ctype c) | |
427 | /*@defines result@*/ | |
28bf4b0b | 428 | /*@ensures isnull result->edata, result->loc, result->val, result->guards, |
429 | result->uses, result->sets, result->msets, result->etext @*/ | |
616915dd | 430 | /*@*/ |
431 | { | |
432 | exprNode e = exprNode_new (); | |
433 | ||
434 | e->typ = c; | |
435 | e->kind = XPR_EMPTY; | |
436 | e->val = multiVal_undefined; | |
437 | e->sref = defref; | |
438 | e->etext = cstring_undefined; | |
439 | e->loc = fileloc_undefined; | |
440 | e->guards = guardSet_undefined; | |
441 | e->uses = sRefSet_undefined; | |
442 | e->sets = sRefSet_undefined; | |
443 | e->msets = sRefSet_undefined; | |
444 | e->edata = exprData_undefined; | |
445 | e->exitCode = XK_NEVERESCAPE; | |
446 | e->canBreak = FALSE; | |
447 | e->mustBreak = FALSE; | |
448 | e->isJumpPoint = FALSE; | |
8ac07c2e | 449 | |
450 | exprNode_defineConstraints(e); | |
451 | ||
616915dd | 452 | return (e); |
453 | } | |
454 | ||
455 | /*@observer@*/ exprNode exprNode_makeMustExit (void) | |
456 | { | |
457 | if (exprNode_isUndefined (mustExitNode)) | |
458 | { | |
459 | mustExitNode = exprNode_createPlain (ctype_unknown); | |
460 | mustExitNode->exitCode = XK_MUSTEXIT; | |
461 | } | |
462 | ||
463 | return mustExitNode; | |
464 | } | |
465 | ||
466 | ||
467 | static /*@notnull@*/ /*@special@*/ exprNode exprNode_create (ctype c) | |
468 | /*@defines result@*/ | |
469 | /*@post:isnull result->edata, result->guards, result->val, | |
470 | result->uses, result->sets, result->msets@*/ | |
471 | /*@*/ | |
472 | { | |
473 | exprNode e = exprNode_createPlain (c); | |
474 | e->loc = fileloc_copy (g_currentloc); | |
475 | return (e); | |
476 | } | |
477 | ||
478 | static /*@notnull@*/ /*@special@*/ exprNode exprNode_createUnknown (void) | |
479 | /*@defines result@*/ | |
480 | /*@post:isnull result->edata, result->guards, | |
481 | result->uses, result->sets, result->msets@*/ | |
482 | /*@*/ | |
483 | { | |
484 | return (exprNode_create (ctype_unknown)); | |
485 | } | |
486 | ||
487 | static /*@notnull@*/ /*@special@*/ exprNode | |
488 | exprNode_createLoc (ctype c, /*@keep@*/ fileloc loc) | |
489 | /*@defines result@*/ | |
490 | /*@post:isnull result->edata, result->guards, result->val, | |
491 | result->uses, result->sets, result->msets@*/ | |
492 | /*@*/ | |
493 | { | |
494 | exprNode e = exprNode_createPlain (c); | |
495 | e->loc = loc; | |
496 | return (e); | |
497 | } | |
498 | ||
499 | static void | |
500 | exprNode_copySets (/*@special@*/ /*@notnull@*/ exprNode ret, exprNode e) | |
501 | /*@defines ret->guards, ret->uses, ret->sets, ret->msets@*/ | |
502 | { | |
503 | if (exprNode_isDefined (e)) | |
504 | { | |
505 | ret->guards = guardSet_copy (e->guards); | |
506 | ret->uses = sRefSet_newCopy (e->uses); | |
507 | ret->sets = sRefSet_newCopy (e->sets); | |
508 | ret->msets = sRefSet_newCopy (e->msets); | |
509 | } | |
510 | else | |
511 | { | |
512 | ret->guards = guardSet_undefined; | |
513 | ret->uses = sRefSet_undefined; | |
514 | ret->sets = sRefSet_undefined; | |
515 | ret->msets = sRefSet_undefined; | |
516 | } | |
517 | } | |
518 | ||
519 | static /*@notnull@*/ /*@special@*/ exprNode | |
520 | exprNode_createPartialLocCopy (exprNode e, /*@only@*/ fileloc loc) | |
521 | /*@defines result@*/ | |
522 | /*@post:isnull result->edata, result->etext@*/ | |
523 | /*@*/ | |
524 | { | |
525 | exprNode ret = exprNode_new (); | |
526 | ||
527 | if (exprNode_isError (e)) | |
528 | { | |
529 | ret->typ = ctype_unknown; | |
530 | ret->val = multiVal_undefined; | |
531 | ret->loc = loc; | |
532 | ret->guards = guardSet_undefined; | |
533 | ret->uses = sRefSet_undefined; | |
534 | ret->sets = sRefSet_undefined; | |
535 | ret->msets = sRefSet_undefined; | |
536 | } | |
537 | else | |
538 | { | |
539 | ret->typ = e->typ; | |
540 | ret->val = multiVal_copy (e->val); | |
541 | ret->loc = loc; | |
542 | ret->guards = guardSet_copy (e->guards); | |
543 | ret->uses = sRefSet_newCopy (e->uses); | |
544 | ret->sets = sRefSet_newCopy (e->sets); | |
545 | ret->msets = sRefSet_newCopy (e->msets); | |
546 | } | |
547 | ||
548 | ret->kind = XPR_EMPTY; | |
549 | ret->sref = defref; | |
550 | ret->etext = cstring_undefined; | |
551 | ret->exitCode = XK_NEVERESCAPE; | |
552 | ret->canBreak = FALSE; | |
553 | ret->mustBreak = FALSE; | |
554 | ret->isJumpPoint = FALSE; | |
555 | ret->edata = exprData_undefined; | |
556 | ||
bb25bea6 | 557 | exprNode_defineConstraints(ret); |
558 | ||
616915dd | 559 | return (ret); |
560 | } | |
561 | ||
562 | ||
563 | static /*@notnull@*/ /*@special@*/ exprNode | |
564 | exprNode_createPartialCopy (exprNode e) | |
565 | /*@defines result@*/ | |
566 | /*@post:isnull result->edata, result->etext@*/ | |
567 | /*@*/ | |
568 | { | |
569 | return (exprNode_createPartialLocCopy (e, fileloc_copy (exprNode_loc (e)))); | |
570 | } | |
571 | ||
572 | static /*@notnull@*/ /*@special@*/ exprNode | |
573 | exprNode_createPartialNVCopy (exprNode e) | |
574 | /*@defines result@*/ | |
575 | /*@post:isnull result->edata, result->etext, result->val @*/ | |
576 | /*@*/ | |
577 | { | |
578 | exprNode ret = exprNode_new (); | |
579 | ||
580 | if (exprNode_isError (e)) | |
581 | { | |
582 | ret->typ = ctype_unknown; | |
583 | ret->loc = fileloc_undefined; | |
584 | ret->guards = guardSet_undefined; | |
585 | ret->uses = sRefSet_undefined; | |
586 | ret->sets = sRefSet_undefined; | |
587 | ret->msets = sRefSet_undefined; | |
588 | } | |
589 | else | |
590 | { | |
591 | ret->typ = e->typ; | |
592 | ret->loc = fileloc_copy (e->loc); | |
593 | ret->guards = guardSet_copy (e->guards); | |
594 | ret->uses = sRefSet_newCopy (e->uses); | |
595 | ret->sets = sRefSet_newCopy (e->sets); | |
596 | ret->msets = sRefSet_newCopy (e->msets); | |
597 | } | |
598 | ||
599 | ret->val = multiVal_undefined; | |
600 | ret->kind = XPR_EMPTY; | |
601 | ret->sref = defref; | |
602 | ret->etext = cstring_undefined; | |
603 | ret->exitCode = XK_NEVERESCAPE; | |
604 | ret->canBreak = FALSE; | |
605 | ret->mustBreak = FALSE; | |
606 | ret->isJumpPoint = FALSE; | |
607 | ret->edata = exprData_undefined; | |
608 | ||
bb25bea6 | 609 | exprNode_defineConstraints(ret); |
610 | ||
616915dd | 611 | return (ret); |
612 | } | |
613 | ||
614 | static /*@notnull@*/ /*@special@*/ exprNode | |
615 | exprNode_createSemiCopy (exprNode e) | |
616 | /*@defines result@*/ | |
617 | /*@post:isnull result->edata, result->etext, result->sets, | |
618 | result->msets, result->uses, result->guards@*/ | |
619 | /*@*/ | |
620 | { | |
621 | if (exprNode_isError (e)) | |
622 | { | |
623 | return exprNode_createPlain (ctype_unknown); | |
624 | } | |
625 | else | |
626 | { | |
627 | exprNode ret = exprNode_new (); | |
628 | ||
629 | ret->typ = e->typ; | |
630 | ret->val = multiVal_copy (e->val); | |
631 | ret->loc = fileloc_copy (e->loc); | |
632 | ret->guards = guardSet_undefined; | |
633 | ret->uses = sRefSet_undefined; | |
634 | ret->sets = sRefSet_undefined; | |
635 | ret->msets = sRefSet_undefined; | |
636 | ||
637 | ret->kind = XPR_EMPTY; | |
638 | ret->sref = defref; | |
639 | ret->etext = cstring_undefined; | |
640 | ret->exitCode = XK_NEVERESCAPE; | |
641 | ret->canBreak = FALSE; | |
642 | ret->mustBreak = FALSE; | |
643 | ret->isJumpPoint = FALSE; | |
644 | ret->edata = exprData_undefined; | |
645 | ||
bb25bea6 | 646 | exprNode_defineConstraints(ret); |
647 | ||
616915dd | 648 | return (ret); |
649 | } | |
650 | } | |
651 | ||
652 | bool | |
653 | exprNode_isNullValue (exprNode e) | |
654 | { | |
655 | if (exprNode_isDefined (e)) | |
656 | { | |
657 | multiVal m = exprNode_getValue (e); | |
658 | ||
659 | if (multiVal_isInt (m)) | |
660 | { | |
661 | return (multiVal_forceInt (m) == 0); | |
662 | } | |
663 | } | |
664 | ||
665 | return FALSE; | |
666 | } | |
667 | ||
668 | static bool | |
669 | exprNode_isUnknownConstant (/*@notnull@*/ exprNode e) | |
670 | { | |
671 | while (e->kind == XPR_PARENS) | |
672 | { | |
673 | e = exprData_getUopNode (e->edata); | |
674 | llassert (exprNode_isDefined (e)); | |
675 | } | |
676 | ||
677 | if (e->kind == XPR_CONST) | |
678 | { | |
679 | multiVal m = exprNode_getValue (e); | |
680 | ||
681 | if (multiVal_isUnknown (m)) | |
682 | { | |
683 | return TRUE; | |
684 | } | |
685 | } | |
686 | ||
687 | return FALSE; | |
688 | } | |
689 | ||
690 | /*@only@*/ exprNode | |
691 | exprNode_numLiteral (ctype c, /*@temp@*/ cstring t, | |
692 | /*@only@*/ fileloc loc, long val) | |
693 | { | |
694 | exprNode e = exprNode_createLoc (c, loc); | |
695 | ||
696 | e->kind = XPR_NUMLIT; | |
697 | ||
698 | llassert (multiVal_isUndefined (e->val)); | |
699 | e->val = multiVal_makeInt (val); | |
700 | e->edata = exprData_makeLiteral (cstring_copy (t)); | |
701 | ||
702 | if (val == 0) | |
703 | { | |
704 | e->sref = sRef_makeUnknown (); | |
705 | sRef_setDefNull (e->sref, e->loc); | |
706 | } | |
707 | ||
708 | DPRINTF (("Num lit: %s / %s", exprNode_unparse (e), ctype_unparse (exprNode_getType (e)))); | |
709 | return (e); | |
710 | } | |
711 | ||
712 | /*@only@*/ exprNode | |
713 | exprNode_charLiteral (char c, cstring text, /*@only@*/ fileloc loc) | |
714 | { | |
715 | exprNode e = exprNode_createLoc (ctype_char, loc); | |
716 | ||
717 | if (context_getFlag (FLG_CHARINTLITERAL)) | |
718 | { | |
719 | e->typ = ctype_makeConj (ctype_char, ctype_int); | |
720 | } | |
721 | ||
722 | e->kind = XPR_NUMLIT; | |
723 | e->val = multiVal_makeChar (c); | |
724 | ||
725 | e->edata = exprData_makeLiteral (cstring_copy (text)); | |
726 | return (e); | |
727 | } | |
728 | ||
729 | /*@only@*/ exprNode | |
730 | exprNode_floatLiteral (double d, ctype ct, cstring text, /*@only@*/ fileloc loc) | |
731 | { | |
732 | exprNode e = exprNode_createLoc (ct, loc); | |
733 | ||
734 | e->kind = XPR_NUMLIT; | |
735 | e->val = multiVal_makeDouble (d); | |
736 | e->edata = exprData_makeLiteral (cstring_copy (text)); | |
737 | return (e); | |
738 | } | |
739 | ||
740 | multiVal exprNode_getValue (exprNode e) | |
741 | { | |
742 | while (exprNode_isInParens (e)) { | |
743 | if (e->edata != NULL) { | |
744 | e = exprData_getUopNode (e->edata); | |
745 | } else { | |
746 | break; | |
747 | } | |
748 | } | |
749 | ||
750 | if (exprNode_isDefined (e)) { | |
751 | return e->val; | |
752 | } else { | |
753 | return multiVal_undefined; | |
754 | } | |
755 | } | |
756 | ||
757 | /*@only@*/ exprNode | |
28bf4b0b | 758 | exprNode_combineLiterals (exprNode e, exprNode rest) |
759 | { | |
760 | cstring ns; | |
761 | ||
762 | /* Both must be string literals. */ | |
763 | ||
764 | if (exprNode_isUndefined (rest) || exprNode_isUndefined (e)) | |
765 | { | |
766 | exprNode_free (rest); | |
767 | return e; | |
768 | } | |
769 | ||
770 | if (!exprNode_isStringLiteral (e)) | |
771 | { | |
772 | voptgenerror | |
773 | (FLG_SYNTAX, | |
774 | message ("Constant concatentation is ungrammatical: %s %s", exprNode_unparse (e), | |
775 | exprNode_unparse (rest)), | |
776 | e->loc); | |
777 | exprNode_free (rest); | |
778 | return e; | |
779 | } | |
780 | ||
781 | if (!exprNode_isStringLiteral (rest)) | |
782 | { | |
783 | voptgenerror | |
784 | (FLG_SYNTAX, | |
785 | message ("Constant concatentation is ungrammatical: %s %s", exprNode_unparse (e), exprNode_unparse (rest)), | |
786 | rest->loc); | |
787 | ||
788 | exprNode_free (rest); | |
789 | return e; | |
790 | } | |
791 | ||
792 | ns = cstring_concat (multiVal_forceString (exprNode_getValue (e)), | |
793 | multiVal_forceString (exprNode_getValue (rest))); | |
794 | ||
795 | multiVal_free (e->val); | |
796 | exprData_free (e->edata, e->kind); | |
797 | e->edata = exprData_makeLiteral (cstring_copy (ns)); | |
798 | e->val = multiVal_makeString (ns); | |
799 | exprNode_free (rest); | |
800 | return e; | |
801 | } | |
802 | ||
803 | /*@only@*/ exprNode | |
804 | exprNode_rawStringLiteral (/*@only@*/ cstring t, /*@only@*/ fileloc loc) | |
616915dd | 805 | { |
806 | exprNode e = exprNode_createLoc (ctype_string, loc); | |
28bf4b0b | 807 | int len = cstring_length (t); |
616915dd | 808 | |
809 | if (context_getFlag (FLG_STRINGLITERALLEN)) | |
810 | { | |
811 | if (len > context_getValue (FLG_STRINGLITERALLEN)) | |
812 | { | |
813 | voptgenerror (FLG_STRINGLITERALLEN, | |
814 | message | |
815 | ("String literal length (%d) exceeds maximum " | |
28bf4b0b | 816 | "length (%d): \"%s\"", |
616915dd | 817 | len, |
818 | context_getValue (FLG_STRINGLITERALLEN), | |
819 | t), | |
820 | e->loc); | |
821 | } | |
822 | } | |
823 | ||
616915dd | 824 | e->kind = XPR_STRINGLITERAL; |
28bf4b0b | 825 | e->val = multiVal_makeString (cstring_copy (t)); |
616915dd | 826 | e->edata = exprData_makeLiteral (t); |
827 | e->sref = sRef_makeType (ctype_string); | |
616915dd | 828 | |
829 | if (context_getFlag (FLG_READONLYSTRINGS)) | |
830 | { | |
831 | sRef_setAliasKind (e->sref, AK_STATIC, fileloc_undefined); | |
832 | sRef_setExKind (e->sref, XO_OBSERVER, loc); | |
833 | } | |
834 | else | |
835 | { | |
836 | sRef_setAliasKind (e->sref, AK_ERROR, fileloc_undefined); | |
837 | } | |
838 | ||
839 | return (e); /* s released */ | |
840 | } | |
841 | ||
28bf4b0b | 842 | /*@only@*/ exprNode |
843 | exprNode_stringLiteral (/*@only@*/ cstring t, /*@only@*/ fileloc loc) | |
844 | { | |
845 | int len = cstring_length (t) - 2; | |
846 | char *ts = cstring_toCharsSafe (t); | |
847 | char *s = cstring_toCharsSafe (cstring_create (len + 1)); | |
848 | ||
849 | llassert (*ts == '\"' && *(ts + len + 1) == '\"'); | |
850 | strncpy (s, ts+1, size_fromInt (len)); | |
851 | *(s + len) = '\0'; | |
852 | cstring_free (t); | |
853 | return exprNode_rawStringLiteral (cstring_fromCharsO (s), loc); | |
854 | } | |
855 | ||
616915dd | 856 | exprNode exprNode_fromUIO (cstring c) |
857 | { | |
858 | fileloc loc = context_getSaveLocation (); | |
859 | exprNode e = exprNode_createPlain (ctype_unknown); | |
860 | ||
861 | e->kind = XPR_VAR; | |
862 | ||
863 | if (fileloc_isUndefined (loc)) | |
864 | { | |
865 | loc = fileloc_copy (g_currentloc); | |
866 | } | |
867 | ||
868 | e->loc = loc; /* save loc was mangled */ | |
869 | e->sref = defref; | |
870 | ||
871 | if (usymtab_exists (c)) | |
872 | { | |
873 | uentry ue = usymtab_lookupEither (c); | |
874 | ||
875 | if (uentry_isDatatype (ue) | |
876 | && uentry_isSpecified (ue)) | |
877 | { | |
878 | llfatalerror | |
879 | (message ("%q: Specified datatype %s used in code, but not defined. " | |
880 | "(Cannot continue reasonably from this error.)", | |
881 | fileloc_unparse (e->loc), c)); | |
882 | } | |
883 | else | |
884 | { | |
885 | BADBRANCH; | |
886 | } | |
887 | } | |
888 | ||
889 | llassertprint (!usymtab_exists (c), ("Entry exists: %s", c)); | |
890 | ||
891 | /* | |
892 | ** was supercedeGlobalEntry...is this better? | |
893 | */ | |
894 | ||
895 | if (!context_inIterEnd ()) | |
896 | { | |
897 | if (context_inMacro ()) | |
898 | { | |
899 | if (context_getFlag (FLG_UNRECOG)) | |
900 | { | |
901 | voptgenerror | |
902 | (FLG_MACROUNDEF, | |
903 | message ("Unrecognized identifier in macro definition: %s", c), e->loc); | |
904 | } | |
905 | else | |
906 | { | |
907 | flagcode_recordSuppressed (FLG_UNRECOG); | |
908 | } | |
909 | } | |
910 | else | |
911 | { | |
912 | voptgenerror | |
28bf4b0b | 913 | (FLG_UNRECOG, message ("Unrecognized identifier: %s", c), e->loc); |
616915dd | 914 | } |
915 | } | |
916 | ||
917 | e->edata = exprData_makeId (uentry_makeUnrecognized (c, fileloc_copy (loc))); | |
918 | ||
919 | /* No alias errors for unrecognized identifiers */ | |
920 | sRef_setAliasKind (e->sref, AK_ERROR, loc); | |
921 | ||
922 | return (e); | |
923 | } | |
924 | ||
925 | exprNode exprNode_createId (/*@observer@*/ uentry c) | |
926 | { | |
927 | if (uentry_isValid (c)) | |
928 | { | |
929 | exprNode e = exprNode_new (); | |
930 | ||
931 | e->typ = uentry_getType (c); | |
932 | ||
933 | if (uentry_isFunction (c) | |
934 | && !sRef_isLocalVar (uentry_getSref (c))) | |
935 | { | |
936 | e->sref = sRef_undefined; | |
937 | } | |
938 | else | |
939 | { | |
940 | e->sref = uentry_getSref (c); | |
941 | } | |
942 | ||
943 | if (sRef_isStateUnknown (e->sref) && uentry_isNonLocal (c)) | |
944 | { | |
945 | sRef_setDefined (e->sref, fileloc_undefined); | |
946 | } | |
947 | ||
948 | /* | |
949 | ** yoikes! leaving this out was a heinous bug...that would have been | |
950 | ** caught if i had lclint working first. gag! | |
951 | */ | |
952 | ||
953 | e->etext = cstring_undefined; | |
954 | ||
955 | if (uentry_isEitherConstant (c)) | |
956 | { | |
957 | e->kind = XPR_CONST; | |
958 | e->val = multiVal_copy (uentry_getConstantValue (c)); | |
959 | } | |
960 | else | |
961 | { | |
962 | e->kind = XPR_VAR; | |
963 | e->val = multiVal_unknown (); | |
964 | } | |
965 | ||
966 | e->edata = exprData_makeId (c); | |
967 | e->loc = context_getSaveLocation (); | |
968 | ||
969 | if (fileloc_isUndefined (e->loc)) | |
970 | { | |
971 | fileloc_free (e->loc); | |
972 | e->loc = fileloc_copy (g_currentloc); | |
973 | } | |
974 | ||
975 | e->guards = guardSet_new (); | |
976 | e->sets = sRefSet_new (); | |
977 | e->msets = sRefSet_new (); | |
978 | e->uses = sRefSet_new (); | |
979 | ||
980 | /*> missing fields, detected by lclint <*/ | |
981 | e->exitCode = XK_NEVERESCAPE; | |
982 | e->isJumpPoint = FALSE; | |
983 | e->canBreak = FALSE; | |
984 | e->mustBreak = FALSE; | |
985 | ||
84c9ffbf | 986 | exprNode_defineConstraints(e); |
987 | ||
616915dd | 988 | return e; |
989 | } | |
990 | else | |
991 | { | |
28bf4b0b | 992 | return exprNode_createUnknown (); |
616915dd | 993 | } |
994 | } | |
995 | ||
996 | /*@notnull@*/ exprNode | |
997 | exprNode_fromIdentifier (/*@observer@*/ uentry c) | |
998 | { | |
999 | exprNode ret; | |
1000 | ||
1001 | if (context_justPopped ()) /* watch out! c could be dead */ | |
1002 | { | |
1003 | uentry ce = usymtab_lookupSafe (LastIdentifier ()); | |
1004 | ||
1005 | if (uentry_isValid (ce)) | |
1006 | { | |
1007 | c = ce; | |
1008 | } | |
1009 | else | |
1010 | { | |
1011 | llbuglit ("Looks like Aunt Millie forgot to walk to dog again."); | |
1012 | } | |
1013 | } | |
1014 | ||
1015 | ret = exprNode_fromIdentifierAux (c); | |
1016 | ||
1017 | return ret; | |
1018 | } | |
1019 | ||
1020 | ||
1021 | static /*@only@*/ /*@notnull@*/ exprNode | |
1022 | exprNode_fromIdentifierAux (/*@observer@*/ uentry c) | |
1023 | { | |
1024 | exprNode e = exprNode_createId (c); | |
1025 | sRef sr = e->sref; | |
1026 | ||
1027 | uentry_setUsed (c, e->loc); | |
1028 | ||
28bf4b0b | 1029 | if (uentry_isVar (c) && sRef_isFileOrGlobalScope (sr)) |
616915dd | 1030 | { |
1031 | checkGlobUse (c, FALSE, e); | |
1032 | } | |
1033 | ||
1034 | return (e); | |
1035 | } | |
1036 | ||
1037 | static bool | |
1038 | exprNode_isZero (exprNode e) | |
1039 | { | |
1040 | if (exprNode_isDefined (e)) | |
1041 | { | |
1042 | multiVal m = exprNode_getValue (e); | |
1043 | ||
1044 | if (multiVal_isInt (m)) | |
1045 | { | |
1046 | return (multiVal_forceInt (m) == 0); | |
1047 | } | |
1048 | } | |
1049 | ||
1050 | return FALSE; | |
1051 | } | |
1052 | ||
1053 | static bool | |
1054 | exprNode_isNonNegative (exprNode e) | |
1055 | { | |
1056 | if (exprNode_isDefined (e)) | |
1057 | { | |
1058 | multiVal m = exprNode_getValue (e); | |
1059 | ||
1060 | if (multiVal_isInt (m)) | |
1061 | { | |
1062 | return (multiVal_forceInt (m) >= 0); | |
1063 | } | |
1064 | } | |
1065 | ||
1066 | return FALSE; | |
1067 | } | |
1068 | ||
1069 | /* | |
1070 | ** a[x] - uses a but NOT a[] | |
1071 | ** result sref = a[] (set/use in assignment) | |
1072 | ** | |
1073 | ** The syntax x[a] is also legal in C, and has the same | |
1074 | ** semantics. If ind is an array, and arr is an int, flip | |
1075 | ** the arguments. | |
1076 | */ | |
1077 | ||
1078 | /*@only@*/ exprNode | |
1079 | exprNode_arrayFetch (/*@only@*/ exprNode e1, /*@only@*/ exprNode e2) | |
1080 | { | |
1081 | /* | |
1082 | ** error in arr, error propagates (no new messages) | |
1083 | ** error in ind, assume valid and continue | |
1084 | */ | |
1085 | ||
1086 | if (exprNode_isError (e1)) | |
1087 | { | |
1088 | exprNode_free (e2); | |
1089 | return (exprNode_makeError ()); | |
1090 | } | |
1091 | else | |
1092 | { | |
1093 | exprNode arr; | |
1094 | exprNode ind; | |
1095 | ctype carr = exprNode_getType (e1); | |
1096 | ctype crarr = ctype_realType (carr); | |
1097 | ||
1098 | /* | |
1099 | ** this sets up funny aliasing, that leads to spurious | |
1100 | ** lclint errors. Hence, the i2 comments. | |
1101 | */ | |
1102 | ||
1103 | if (!ctype_isRealArray (crarr) | |
1104 | && ctype_isRealNumeric (crarr) | |
1105 | && !exprNode_isError (e2) | |
1106 | && ctype_isRealAP (exprNode_getType (e2))) /* fetch like 3[a] */ | |
1107 | { | |
1108 | arr = e2; | |
1109 | ind = e1; | |
1110 | ||
1111 | carr = exprNode_getType (arr); | |
1112 | crarr = ctype_realType (carr); | |
1113 | } | |
1114 | else | |
1115 | { | |
1116 | arr = e1; | |
1117 | ind = e2; | |
1118 | } | |
1119 | ||
1120 | if (sRef_possiblyNull (arr->sref)) | |
1121 | { | |
1122 | if (!usymtab_isGuarded (arr->sref)) | |
1123 | { | |
1124 | if (optgenerror (FLG_NULLDEREF, | |
1125 | message ("Index of %s pointer %q: %s", | |
1126 | sRef_nullMessage (arr->sref), | |
1127 | sRef_unparse (arr->sref), | |
1128 | exprNode_unparse (arr)), | |
1129 | arr->loc)) | |
1130 | { | |
1131 | sRef_showNullInfo (arr->sref); | |
1132 | ||
1133 | /* suppress future messages */ | |
1134 | sRef_setNullError (arr->sref); | |
1135 | } | |
1136 | } | |
1137 | } | |
1138 | ||
1139 | if (exprNode_isError (ind)) | |
1140 | { | |
1141 | if ((ctype_isArrayPtr (crarr) | |
1142 | && !ctype_isFunction (crarr)) | |
1143 | || ctype_isUnknown (carr)) | |
1144 | { | |
1145 | exprNode ret = exprNode_createPartialCopy (arr); | |
1146 | ||
1147 | if (ctype_isKnown (carr)) | |
1148 | { | |
1149 | ret->typ = ctype_baseArrayPtr (crarr); | |
1150 | } | |
1151 | else | |
1152 | { | |
1153 | ret->typ = ctype_unknown; | |
1154 | } | |
1155 | ||
1156 | ret->sref = sRef_makeArrayFetch (arr->sref); | |
1157 | ||
1158 | ret->kind = XPR_FETCH; | |
1159 | ||
1160 | /* | |
1161 | ** Because of funny aliasing (when arr and ind are | |
1162 | ** flipped) spurious errors would be reported here. | |
1163 | */ | |
1164 | ||
1165 | /*@i2@*/ ret->edata = exprData_makePair (arr, ind); | |
1166 | checkSafeUse (ret, arr->sref); | |
1167 | return (ret); | |
1168 | } | |
1169 | else | |
1170 | { | |
1171 | voptgenerror (FLG_TYPE, | |
1172 | message ("Array fetch from non-array (%t): %s[%s]", carr, | |
1173 | exprNode_unparse (e1), exprNode_unparse (e2)), | |
1174 | arr->loc); | |
1175 | exprNode_free (arr); | |
1176 | return (exprNode_makeError ()); | |
1177 | } | |
1178 | } | |
1179 | else | |
1180 | { | |
1181 | if (!ctype_isForceRealInt (&(ind->typ))) | |
1182 | { | |
1183 | ctype rt = ctype_realType (ind->typ); | |
1184 | ||
1185 | if (ctype_isChar (rt)) | |
1186 | { | |
1187 | vnoptgenerror | |
1188 | (FLG_CHARINDEX, | |
1189 | message ("Array fetch using non-integer, %t: %s[%s]", | |
1190 | ind->typ, | |
1191 | exprNode_unparse (e1), exprNode_unparse (e2)), | |
1192 | arr->loc); | |
1193 | } | |
1194 | else if (ctype_isEnum (rt)) | |
1195 | { | |
1196 | vnoptgenerror | |
1197 | (FLG_ENUMINDEX, | |
1198 | message ("Array fetch using non-integer, %t: %s[%s]", | |
1199 | ind->typ, | |
1200 | exprNode_unparse (e1), exprNode_unparse (e2)), | |
1201 | arr->loc); | |
1202 | } | |
1203 | else | |
1204 | { | |
1205 | voptgenerror | |
1206 | (FLG_TYPE, | |
1207 | message ("Array fetch using non-integer, %t: %s[%s]", | |
1208 | ind->typ, | |
1209 | exprNode_unparse (e1), exprNode_unparse (e2)), | |
1210 | arr->loc); | |
1211 | } | |
1212 | ||
1213 | multiVal_free (ind->val); | |
1214 | ind->val = multiVal_unknown (); | |
1215 | } | |
1216 | ||
1217 | if (ctype_isArrayPtr (crarr) && !ctype_isFunction (crarr)) | |
1218 | { | |
1219 | exprNode ret = exprNode_createSemiCopy (arr); | |
1220 | multiVal m = exprNode_getValue (ind); | |
1221 | ||
1222 | ret->typ = ctype_baseArrayPtr (crarr); | |
1223 | ret->kind = XPR_FETCH; | |
1224 | ||
1225 | if (multiVal_isInt (m)) | |
1226 | { | |
1227 | int i = (int) multiVal_forceInt (m); | |
1228 | ||
1229 | if (sRef_isValid (arr->sref)) { | |
1230 | ret->sref = sRef_makeArrayFetchKnown (arr->sref, i); | |
1231 | } else { | |
1232 | ret->sref = sRef_undefined; | |
1233 | } | |
1234 | } | |
1235 | else | |
1236 | { | |
28bf4b0b | 1237 | ret->sref = sRef_makeArrayFetch (arr->sref); |
616915dd | 1238 | } |
1239 | ||
1240 | ret->sets = sRefSet_realNewUnion (arr->sets, ind->sets); | |
1241 | ret->msets = sRefSet_realNewUnion (arr->msets, ind->msets); | |
1242 | ret->uses = sRefSet_realNewUnion (arr->uses, ind->uses); | |
1243 | ||
1244 | /* (see comment on spurious errors above) */ | |
1245 | /*@i2@*/ ret->edata = exprData_makePair (arr, ind); | |
1246 | ||
1247 | exprNode_checkUse (ret, ind->sref, ind->loc); | |
1248 | exprNode_checkUse (ret, arr->sref, arr->loc); | |
1249 | ||
1250 | return (ret); | |
1251 | } | |
1252 | else | |
1253 | { | |
1254 | if (ctype_isUnknown (carr)) | |
1255 | { | |
1256 | exprNode ret = exprNode_createPartialCopy (arr); | |
1257 | ||
1258 | ret->kind = XPR_FETCH; | |
1259 | ret->typ = ctype_unknown; | |
1260 | ret->sets = sRefSet_union (ret->sets, ind->sets); | |
1261 | ret->msets = sRefSet_union (ret->msets, ind->msets); | |
1262 | ret->uses = sRefSet_union (ret->uses, ind->uses); | |
1263 | ||
1264 | /* (see comment on spurious errors above) */ | |
1265 | /*@i2@*/ ret->edata = exprData_makePair (arr, ind); | |
1266 | ||
1267 | exprNode_checkUse (ret, ind->sref, ind->loc); | |
1268 | exprNode_checkUse (ret, arr->sref, arr->loc); | |
1269 | return (ret); | |
1270 | } | |
1271 | else | |
1272 | { | |
1273 | voptgenerror | |
1274 | (FLG_TYPE, | |
1275 | message ("Array fetch from non-array (%t): %s[%s]", carr, | |
1276 | exprNode_unparse (e1), exprNode_unparse (e2)), | |
1277 | arr->loc); | |
1278 | ||
1279 | exprNode_free (arr); | |
1280 | exprNode_free (ind); | |
1281 | ||
1282 | return (exprNode_makeError ()); | |
1283 | } | |
1284 | } | |
1285 | } | |
1286 | } | |
1287 | BADEXIT; | |
1288 | } | |
1289 | ||
1290 | ||
1291 | static int | |
1292 | checkArgs (uentry fcn, /*@dependent@*/ exprNode f, ctype t, | |
1293 | exprNodeList args, exprNode ret) | |
1294 | { | |
1295 | return (checkArgsReal (fcn, f, ctype_argsFunction (t), args, FALSE, ret)); | |
1296 | } | |
1297 | ||
1298 | /* | |
1299 | ** checkPrintfArgs --- checks arguments for printf-like functions | |
1300 | ** Arguments before ... have already been checked. | |
1301 | ** The argument before the ... is a char *. | |
1302 | ** argno is the format string argument. | |
1303 | */ | |
1304 | ||
1305 | static void | |
1306 | checkPrintfArgs (/*@notnull@*/ /*@dependent@*/ exprNode f, uentry fcn, | |
1307 | exprNodeList args, exprNode ret, int argno) | |
1308 | { | |
1309 | /* | |
1310 | ** the last argument before the elips is the format string | |
1311 | */ | |
1312 | ||
1313 | int i = argno; | |
1314 | fileloc formatloc; | |
1315 | int nargs = exprNodeList_size (args); | |
1316 | uentryList params = uentry_getParams (fcn); | |
1317 | exprNode a; | |
1318 | ||
1319 | /* | |
1320 | ** These should be ensured by checkSpecialFunction | |
1321 | */ | |
1322 | ||
1323 | llassert (uentryList_size (params) == argno + 1); | |
1324 | llassert (uentry_isElipsisMarker (uentryList_getN (params, argno))); | |
1325 | ||
1326 | a = exprNodeList_getN (args, argno - 1); | |
1327 | formatloc = fileloc_copy (exprNode_loc (a)); | |
1328 | ||
1329 | if (exprNode_isDefined (a) && exprNode_isStringLiteral (a) | |
1330 | && exprNode_knownStringValue (a)) | |
1331 | { | |
1332 | char *format = cstring_toCharsSafe (multiVal_forceString (exprNode_getValue (a))); | |
1333 | char *code = format; | |
1334 | char *ocode = code; | |
1335 | ||
1336 | nargs = exprNodeList_size (args); | |
1337 | ||
1338 | while ((code = strchr (code, '%')) != NULL) | |
1339 | { | |
1340 | char *origcode = code; | |
28bf4b0b | 1341 | cstring codetext = cstring_newEmpty (); |
616915dd | 1342 | char key = *(++code); |
1343 | ctype modtype = ctype_int; | |
1344 | bool modified = FALSE; | |
1345 | ||
1346 | fileloc_addColumn (formatloc, code - ocode); | |
1347 | ||
28bf4b0b | 1348 | codetext = cstring_appendChar (codetext, key); |
1349 | ||
616915dd | 1350 | /* ignore flags */ |
1351 | while (isFlagKey (key)) | |
1352 | { | |
1353 | key = *(++code); | |
28bf4b0b | 1354 | codetext = cstring_appendChar (codetext, key); |
616915dd | 1355 | fileloc_incColumn (formatloc); |
1356 | } | |
1357 | ||
1358 | if (key == 'm') /* skipped in syslog */ | |
1359 | { | |
1360 | continue; | |
1361 | } | |
1362 | ||
1363 | /* ignore field width */ | |
1364 | while (isdigit ((int) key) != 0) | |
1365 | { | |
1366 | key = *(++code); | |
28bf4b0b | 1367 | codetext = cstring_appendChar (codetext, key); |
616915dd | 1368 | fileloc_incColumn (formatloc); |
1369 | } | |
1370 | ||
1371 | /* ignore precision */ | |
1372 | if (key == '.') | |
1373 | { | |
1374 | key = *(++code); | |
28bf4b0b | 1375 | codetext = cstring_appendChar (codetext, key); |
616915dd | 1376 | fileloc_incColumn (formatloc); |
1377 | ||
1378 | /* | |
1379 | ** In printf, '*' means: read the next arg as an int for the | |
1380 | ** field width. This seems to be missing from my copy of the | |
1381 | ** standard x3.159-1989. Setion 4.9.6.1 refers to * (described | |
1382 | ** later) but never does. | |
1383 | */ | |
1384 | ||
1385 | if (key == '*') | |
1386 | { | |
1387 | ; /* don't do anything --- handle later */ | |
1388 | } | |
1389 | else | |
1390 | { | |
1391 | while (isdigit ((int) key) != 0) | |
1392 | { | |
1393 | key = *(++code); | |
28bf4b0b | 1394 | codetext = cstring_appendChar (codetext, key); |
616915dd | 1395 | fileloc_incColumn (formatloc); |
1396 | } | |
1397 | } | |
1398 | } | |
1399 | ||
1400 | if (key == 'h') | |
1401 | { | |
1402 | modtype = ctype_sint; /* short */ | |
1403 | key = *(++code); | |
28bf4b0b | 1404 | codetext = cstring_appendChar (codetext, key); |
616915dd | 1405 | fileloc_incColumn (formatloc); |
1406 | } | |
1407 | else if (key == 'l' || key == 'L') | |
1408 | { | |
1409 | modtype = ctype_lint; /* long */ | |
1410 | key = *(++code); | |
28bf4b0b | 1411 | codetext = cstring_appendChar (codetext, key); |
616915dd | 1412 | fileloc_incColumn (formatloc); |
1413 | ||
1414 | if (key == 'l' || key == 'L') { | |
1415 | modtype = ctype_llint; /* long long */ | |
1416 | key = *(++code); | |
28bf4b0b | 1417 | codetext = cstring_appendChar (codetext, key); |
616915dd | 1418 | fileloc_incColumn (formatloc); |
1419 | } | |
1420 | } | |
1421 | else | |
1422 | { | |
1423 | ; /* no modifier */ | |
1424 | } | |
1425 | ||
1426 | /* now, key = type of conversion to apply */ | |
1427 | ++code; | |
1428 | fileloc_incColumn (formatloc); | |
1429 | ||
1430 | if (key != '%') | |
1431 | { | |
1432 | if (i >= nargs) | |
1433 | { | |
1434 | if (optgenerror | |
1435 | (FLG_TYPE, | |
1436 | message ("No argument corresponding to %q format " | |
28bf4b0b | 1437 | "code %d (%%%s): \"%s\"", |
616915dd | 1438 | uentry_getName (fcn), |
28bf4b0b | 1439 | i, codetext, |
616915dd | 1440 | cstring_fromChars (format)), |
1441 | f->loc)) | |
1442 | { | |
1443 | if (fileloc_isDefined (formatloc) | |
1444 | && context_getFlag (FLG_SHOWCOL)) | |
1445 | { | |
1446 | llgenindentmsg (cstring_makeLiteral ("Corresponding format code"), | |
1447 | formatloc); | |
1448 | } | |
1449 | } | |
1450 | i++; | |
1451 | } | |
1452 | else | |
1453 | { | |
1454 | a = exprNodeList_getN (args, i); | |
1455 | i++; | |
1456 | ||
1457 | if (!exprNode_isError (a)) | |
1458 | { | |
1459 | ctype expecttype; | |
1460 | ||
1461 | switch (key) | |
1462 | { | |
1463 | case '*': /* int argument for fieldwidth */ | |
1464 | expecttype = ctype_int; | |
1465 | *(--code) = '%'; /* convert it for next code */ | |
1466 | fileloc_subColumn (formatloc, 1); | |
1467 | /*@switchbreak@*/ break; | |
1468 | case 'u': | |
1469 | case 'o': | |
1470 | expecttype = ctype_combine (ctype_uint, modtype); | |
1471 | /*@switchbreak@*/ break; | |
1472 | ||
1473 | case 'i': /* int argument */ | |
1474 | case 'd': | |
1475 | expecttype = ctype_combine (ctype_int, modtype); | |
1476 | /*@switchbreak@*/ break; | |
1477 | ||
28bf4b0b | 1478 | case 'x': /* unsigned int */ |
616915dd | 1479 | case 'X': |
28bf4b0b | 1480 | expecttype = ctype_combine (ctype_uint, modtype); |
1481 | ||
616915dd | 1482 | /*@switchbreak@*/ break; |
1483 | ||
1484 | case 'e': | |
1485 | case 'E': | |
1486 | case 'g': | |
1487 | case 'G': | |
1488 | case 'f': /* double */ | |
1489 | expecttype = ctype_combine (ctype_double, modtype); | |
1490 | /*@switchbreak@*/ break; | |
1491 | ||
1492 | case 'c': /* int converted to char (check its a char?) */ | |
1493 | expecttype = ctype_makeConj (ctype_char, ctype_uchar); | |
1494 | /*@switchbreak@*/ break; | |
1495 | ||
1496 | case 's': /* string */ | |
1497 | expecttype = ctype_string; | |
1498 | /*@switchbreak@*/ break; | |
1499 | case '[': | |
1500 | /* skip to ']' */ | |
1501 | while (((key = *(++code)) != ']') | |
1502 | && (key != '\0')) | |
1503 | { | |
28bf4b0b | 1504 | codetext = cstring_appendChar (codetext, key); |
616915dd | 1505 | fileloc_incColumn (formatloc); |
1506 | } | |
1507 | ||
1508 | if (key == '\0') | |
1509 | { | |
1510 | llfatalerrorLoc | |
1511 | (message ("Bad character set format: %s", | |
1512 | cstring_fromChars (origcode))); | |
1513 | } | |
1514 | ||
1515 | expecttype = ctype_string; | |
1516 | /*@switchbreak@*/ break; | |
1517 | ||
1518 | case 'p': /* pointer */ | |
1519 | expecttype = ctype_makePointer (ctype_void); | |
346fab44 | 1520 | uentry_setDefState (regArg, SS_RELDEF); /* need not be defined */ |
1521 | sRef_setPosNull (uentry_getSref (regArg), fileloc_undefined); /* could be null */ | |
616915dd | 1522 | /*@switchbreak@*/ break; |
1523 | ||
1524 | case 'n': /* pointer to int, modified by call! */ | |
1525 | expecttype = ctype_combine (ctype_makePointer (ctype_int), modtype); | |
1526 | modified = TRUE; | |
1527 | uentry_setDefState (regArg, SS_ALLOCATED); /* corresponds to out */ | |
1528 | /*@switchbreak@*/ break; | |
1529 | ||
1530 | case 'm': /* in a syslog, it doesn't consume an argument */ | |
1531 | /* should check we're really doing syslog */ | |
1532 | ||
1533 | /*@switchbreak@*/ break; | |
1534 | ||
1535 | ||
1536 | default: | |
1537 | expecttype = ctype_unknown; | |
1538 | ||
1539 | voptgenerror | |
1540 | (FLG_FORMATCODE, | |
1541 | message ("Unrecognized format code: %s", | |
1542 | cstring_fromChars (origcode)), | |
1543 | fileloc_isDefined (formatloc) | |
1544 | ? formatloc : g_currentloc); | |
1545 | ||
1546 | /*@switchbreak@*/ break; | |
1547 | } | |
1548 | ||
1549 | if (!(exprNode_matchArgType (expecttype, a))) | |
1550 | { | |
1551 | if (ctype_isVoidPointer (expecttype) | |
1552 | && ctype_isRealAbstract (a->typ) | |
1553 | && (context_getFlag (FLG_ABSTVOIDP))) | |
1554 | { | |
1555 | ; | |
1556 | } | |
1557 | else | |
1558 | { | |
1559 | if (llgenformattypeerror | |
1560 | (expecttype, exprNode_undefined, | |
1561 | a->typ, a, | |
28bf4b0b | 1562 | message ("Format argument %d to %q (%%%s) expects " |
616915dd | 1563 | "%t gets %t: %s", |
1564 | i - argno, | |
1565 | uentry_getName (fcn), | |
28bf4b0b | 1566 | codetext, |
1567 | expecttype, | |
616915dd | 1568 | a->typ, exprNode_unparse (a)), |
1569 | a->loc)) | |
1570 | { | |
1571 | if (fileloc_isDefined (formatloc) | |
1572 | && context_getFlag (FLG_SHOWCOL)) | |
1573 | { | |
1574 | llgenindentmsg | |
1575 | (cstring_makeLiteral | |
1576 | ("Corresponding format code"), | |
1577 | formatloc); | |
1578 | } | |
1579 | } | |
1580 | } | |
1581 | } | |
1582 | ||
1583 | uentry_setType (regArg, expecttype); | |
1584 | checkOneArg (regArg, a, f, FALSE, i+1, nargs); | |
1585 | ||
1586 | if (ctype_equal (expecttype, ctype_string)) | |
1587 | { | |
1588 | exprNode_checkUse (a, sRef_makePointer (a->sref), a->loc); | |
1589 | } | |
1590 | ||
1591 | uentry_setType (regArg, ctype_unknown); | |
1592 | uentry_fixupSref (regArg); | |
346fab44 | 1593 | |
616915dd | 1594 | if (modified) |
1595 | { | |
1596 | exprNode_checkCallModifyVal (a->sref, args, f, ret); | |
1597 | } | |
1598 | } | |
1599 | else | |
1600 | { | |
1601 | ; | |
1602 | } | |
1603 | } | |
1604 | } | |
28bf4b0b | 1605 | |
616915dd | 1606 | ocode = code; |
28bf4b0b | 1607 | cstring_free (codetext); |
616915dd | 1608 | } |
1609 | ||
1610 | if (i < nargs) | |
1611 | { | |
1612 | voptgenerror (FLG_TYPE, | |
28bf4b0b | 1613 | message ("Format string for %q has %d arg%&, given %d", |
616915dd | 1614 | uentry_getName (fcn), i - argno, nargs - argno), |
1615 | f->loc); | |
1616 | } | |
1617 | } | |
1618 | else | |
1619 | { | |
1620 | /* no checking possible for compile-time unknown format strings */ | |
28bf4b0b | 1621 | if (exprNode_isDefined (a)) |
1622 | { | |
1623 | voptgenerror | |
1624 | (FLG_FORMATCONST, | |
1625 | message ("Format string parameter to %s is not a compile-time constant: %s", | |
1626 | exprNode_unparse (f), | |
1627 | exprNode_unparse (a)), | |
1628 | f->loc); | |
1629 | } | |
616915dd | 1630 | } |
28bf4b0b | 1631 | |
616915dd | 1632 | fileloc_free (formatloc); |
1633 | } | |
1634 | ||
1635 | static void | |
1636 | checkScanfArgs (/*@notnull@*/ /*@dependent@*/ exprNode f, uentry fcn, | |
1637 | exprNodeList args, exprNode ret, int argno) | |
1638 | { | |
1639 | int i = argno; | |
1640 | fileloc formatloc; | |
1641 | int nargs = exprNodeList_size (args); | |
1642 | uentryList params = uentry_getParams (fcn); | |
1643 | exprNode a; | |
1644 | ||
1645 | /* | |
1646 | ** These should be ensured by checkSpecialFunction | |
1647 | */ | |
1648 | ||
1649 | llassert (uentryList_size (params) == argno + 1); | |
1650 | llassert (uentry_isElipsisMarker (uentryList_getN (params, argno))); | |
1651 | ||
1652 | a = exprNodeList_getN (args, argno - 1); | |
1653 | formatloc = fileloc_copy (exprNode_loc (a)); | |
1654 | ||
1655 | if (exprNode_isDefined (a) && exprNode_isStringLiteral (a) | |
1656 | && exprNode_knownStringValue (a)) | |
1657 | { | |
1658 | char *format = cstring_toCharsSafe (multiVal_forceString (exprNode_getValue (a))); | |
1659 | char *code = format; | |
1660 | char *ocode = code; | |
1661 | ||
1662 | nargs = exprNodeList_size (args); | |
1663 | ||
1664 | while ((code = strchr (code, '%')) != NULL) | |
1665 | { | |
1666 | char *origcode = code; | |
1667 | char key = *(++code); | |
28bf4b0b | 1668 | cstring codetext = cstring_newEmpty (); |
616915dd | 1669 | ctype modtype = ctype_int; |
1670 | char modifier = '\0'; | |
1671 | bool modified = TRUE; | |
1672 | bool ignore = FALSE; | |
1673 | ||
28bf4b0b | 1674 | codetext = cstring_appendChar (codetext, key); |
616915dd | 1675 | fileloc_addColumn (formatloc, code - ocode); |
1676 | ||
1677 | /* | |
1678 | ** this is based on ANSI standard library description of fscanf | |
1679 | ** (from ANSI standard X3.159-1989, 4.9.6.1) | |
1680 | */ | |
1681 | ||
1682 | /* '*' suppresses assignment (does not need match argument) */ | |
1683 | ||
1684 | if (key == '*') | |
1685 | { | |
1686 | key = *(++code); | |
28bf4b0b | 1687 | codetext = cstring_appendChar (codetext, key); |
616915dd | 1688 | modified = FALSE; |
1689 | ignore = TRUE; | |
1690 | fileloc_incColumn (formatloc); | |
1691 | } | |
1692 | ||
1693 | /* ignore field width */ | |
1694 | while (isdigit ((int) key) != 0) | |
1695 | { | |
1696 | key = *(++code); | |
28bf4b0b | 1697 | codetext = cstring_appendChar (codetext, key); |
616915dd | 1698 | fileloc_incColumn (formatloc); |
1699 | } | |
1700 | ||
1701 | if (key == 'h') | |
1702 | { | |
1703 | modtype = ctype_sint; /* short */ | |
1704 | key = *(++code); | |
28bf4b0b | 1705 | codetext = cstring_appendChar (codetext, key); |
616915dd | 1706 | fileloc_incColumn (formatloc); |
1707 | } | |
1708 | else if (key == 'l' || key == 'L') | |
1709 | { | |
1710 | modtype = ctype_lint; /* long */ | |
1711 | modifier = key; | |
1712 | ||
1713 | key = *(++code); | |
28bf4b0b | 1714 | codetext = cstring_appendChar (codetext, key); |
1715 | ||
616915dd | 1716 | fileloc_incColumn (formatloc); |
1717 | ||
1718 | if (key == 'l' || key == 'L') { | |
1719 | modtype = ctype_llint; /* long long */ | |
1720 | key = *(++code); | |
28bf4b0b | 1721 | codetext = cstring_appendChar (codetext, key); |
616915dd | 1722 | fileloc_incColumn (formatloc); |
1723 | } | |
1724 | } | |
1725 | else | |
1726 | { | |
1727 | ; /* no modifier */ | |
1728 | } | |
1729 | ||
1730 | /* now, key = type of conversion to apply */ | |
1731 | ++code; | |
1732 | fileloc_incColumn (formatloc); | |
1733 | ||
1734 | if (key != '%') | |
1735 | { | |
1736 | if (ignore) | |
1737 | { | |
1738 | ; | |
1739 | } | |
1740 | else | |
1741 | { | |
1742 | if (i >= nargs) | |
1743 | { | |
1744 | if (optgenerror | |
1745 | (FLG_TYPE, | |
1746 | message ("No argument corresponding to %q format " | |
28bf4b0b | 1747 | "code %d (%%%s): \"%s\"", |
616915dd | 1748 | uentry_getName (fcn), |
28bf4b0b | 1749 | i, codetext, |
616915dd | 1750 | cstring_fromChars (format)), |
1751 | f->loc)) | |
1752 | { | |
1753 | if (fileloc_isDefined (formatloc) | |
1754 | && context_getFlag (FLG_SHOWCOL)) | |
1755 | { | |
1756 | llgenindentmsg | |
1757 | (cstring_makeLiteral ("Corresponding format code"), | |
1758 | formatloc); | |
1759 | } | |
1760 | } | |
1761 | i++; | |
1762 | } | |
1763 | else | |
1764 | { | |
1765 | a = exprNodeList_getN (args, i); | |
1766 | i++; | |
1767 | ||
1768 | if (!exprNode_isError (a)) | |
1769 | { | |
1770 | ctype expecttype; | |
1771 | ||
1772 | switch (key) | |
1773 | { | |
1774 | case '*': /* int argument for fieldwidth */ | |
1775 | expecttype = ctype_makePointer (ctype_int); | |
1776 | *(--code) = '%'; /* convert it for next code */ | |
1777 | fileloc_subColumn (formatloc, 1); | |
1778 | /*@switchbreak@*/ break; | |
1779 | case 'u': | |
1780 | case 'o': | |
1781 | expecttype = ctype_makePointer (ctype_combine (ctype_uint, modtype)); | |
1782 | /*@switchbreak@*/ break; | |
1783 | ||
1784 | case 'i': | |
1785 | case 'd': | |
1786 | case 'x': | |
1787 | case 'X': /* unsigned int */ | |
1788 | expecttype = ctype_makePointer (ctype_combine (ctype_int, modtype)); | |
1789 | /*@switchbreak@*/ break; | |
1790 | ||
1791 | case 'e': | |
1792 | case 'E': | |
1793 | case 'g': | |
1794 | case 'G': | |
1795 | case 'f': | |
1796 | /* printf is double, scanf is float! */ | |
1797 | ||
1798 | if (modifier == 'l') | |
1799 | { | |
1800 | expecttype = ctype_makePointer (ctype_double); | |
1801 | } | |
1802 | else if (modifier == 'L') | |
1803 | { | |
1804 | expecttype = ctype_makePointer (ctype_ldouble); | |
1805 | } | |
1806 | else | |
1807 | { | |
1808 | llassert (modifier == '\0'); | |
1809 | expecttype = ctype_makePointer (ctype_float); | |
1810 | } | |
1811 | /*@switchbreak@*/ break; | |
1812 | ||
1813 | case 'c': /* int converted to char (check its a char?) */ | |
1814 | expecttype = ctype_makePointer (ctype_makeConj (ctype_char, ctype_uchar)); | |
1815 | /*@switchbreak@*/ break; | |
1816 | ||
1817 | case 's': /* string */ | |
1818 | expecttype = ctype_string; | |
1819 | /*@switchbreak@*/ break; | |
1820 | ||
1821 | case '[': | |
1822 | /* skip to ']' */ | |
1823 | while (((key = *(++code)) != ']') | |
1824 | && (key != '\0')) | |
1825 | { | |
28bf4b0b | 1826 | codetext = cstring_appendChar (codetext, key); |
616915dd | 1827 | fileloc_incColumn (formatloc); |
1828 | } | |
1829 | ||
1830 | if (key == '\0') | |
1831 | { | |
1832 | llfatalerrorLoc | |
1833 | (message ("Bad character set format: %s", | |
1834 | cstring_fromChars (origcode))); | |
1835 | } | |
1836 | ||
1837 | expecttype = ctype_string; | |
1838 | /*@switchbreak@*/ break; | |
346fab44 | 1839 | |
616915dd | 1840 | |
1841 | case 'p': /* pointer */ | |
346fab44 | 1842 | voptgenerror |
1843 | (FLG_FORMATCODE, | |
1844 | message ("Format code should not be used in scanf: %s", | |
1845 | cstring_fromChars (origcode)), | |
1846 | fileloc_isDefined (formatloc) | |
1847 | ? formatloc : g_currentloc); | |
1848 | ||
616915dd | 1849 | expecttype = ctype_unknown; |
616915dd | 1850 | /*@switchbreak@*/ break; |
1851 | ||
1852 | case 'n': /* pointer to int, modified by call! */ | |
1853 | expecttype = ctype_makePointer (ctype_int); | |
1854 | /*@switchbreak@*/ break; | |
1855 | ||
1856 | default: | |
1857 | expecttype = ctype_unknown; | |
1858 | ||
1859 | voptgenerror | |
1860 | (FLG_FORMATCODE, | |
1861 | message ("Unrecognized format code: %s", | |
1862 | cstring_fromChars (origcode)), | |
1863 | fileloc_isDefined (formatloc) | |
1864 | ? formatloc : g_currentloc); | |
1865 | ||
1866 | /*@switchbreak@*/ break; | |
1867 | } | |
1868 | ||
1869 | if (!(exprNode_matchArgType (expecttype, a))) | |
1870 | { | |
1871 | if (ctype_isVoidPointer (expecttype) | |
1872 | && ctype_isRealAbstract (a->typ) | |
1873 | && (context_getFlag (FLG_ABSTVOIDP))) | |
1874 | { | |
1875 | ; | |
1876 | } | |
1877 | else | |
1878 | { | |
28bf4b0b | 1879 | if (llgenformattypeerror |
1880 | (expecttype, exprNode_undefined, | |
1881 | a->typ, a, | |
1882 | message ("Format argument %d to %q (%%%s) expects " | |
1883 | "%t gets %t: %s", | |
1884 | i - argno, | |
1885 | uentry_getName (fcn), | |
1886 | codetext, expecttype, | |
1887 | a->typ, exprNode_unparse (a)), | |
1888 | a->loc)) | |
616915dd | 1889 | { |
28bf4b0b | 1890 | if (fileloc_isDefined (formatloc) |
1891 | && context_getFlag (FLG_SHOWCOL)) | |
616915dd | 1892 | { |
28bf4b0b | 1893 | llgenindentmsg |
1894 | (cstring_makeLiteral | |
1895 | ("Corresponding format code"), | |
1896 | formatloc); | |
616915dd | 1897 | } |
1898 | } | |
1899 | } | |
1900 | } | |
1901 | ||
1902 | uentry_setType (outArg, expecttype); | |
1903 | checkOneArg (outArg, a, f, FALSE, i+1, nargs); | |
1904 | uentry_setType (outArg, ctype_unknown); | |
1905 | uentry_fixupSref (outArg); | |
1906 | ||
1907 | if (modified) | |
1908 | { | |
1909 | exprNode_checkCallModifyVal (a->sref, args, f, ret); | |
1910 | } | |
1911 | } | |
1912 | else | |
1913 | { | |
1914 | /* a->sref = defref; */ | |
1915 | } | |
1916 | } | |
1917 | } | |
1918 | } | |
28bf4b0b | 1919 | |
616915dd | 1920 | ocode = code; |
28bf4b0b | 1921 | cstring_free (codetext); |
616915dd | 1922 | } |
1923 | ||
1924 | if (i < nargs) | |
1925 | { | |
1926 | voptgenerror (FLG_TYPE, | |
28bf4b0b | 1927 | message ("Format string for %q has %d arg%&, given %d", |
616915dd | 1928 | uentry_getName (fcn), i - argno, nargs - argno), |
1929 | f->loc); | |
1930 | } | |
1931 | } | |
1932 | else | |
1933 | { | |
1934 | /* no checking possible for compile-time unknown format strings */ | |
1935 | } | |
1936 | ||
1937 | fileloc_free (formatloc); | |
1938 | } | |
1939 | ||
1940 | static void | |
1941 | checkMessageArgs (/*@notnull@*/ /*@dependent@*/ exprNode f, | |
1942 | uentry fcn, | |
1943 | exprNodeList args, | |
1944 | /*@unused@*/ int argno) | |
1945 | { | |
1946 | /* | |
1947 | ** the last argument before the elips is the format string | |
1948 | */ | |
1949 | ||
1950 | int nargs = exprNodeList_size (args); | |
1951 | int i = argno; | |
1952 | fileloc formatloc; | |
1953 | exprNode a; | |
1954 | ||
1955 | a = exprNodeList_getN (args, argno - 1); | |
1956 | formatloc = fileloc_copy (exprNode_loc (a)); | |
1957 | ||
1958 | if (ctype_isUnknown (cstringType)) { | |
1959 | if (usymtab_existsType (cstring_makeLiteralTemp ("cstring"))) | |
1960 | { | |
1961 | cstringType = usymtab_lookupAbstractType (cstring_makeLiteralTemp ("cstring")); | |
1962 | } | |
1963 | } | |
1964 | ||
1965 | if (ctype_isUnknown (ctypeType)) { | |
1966 | if (usymtab_existsType (cstring_makeLiteralTemp ("ctype"))) | |
1967 | { | |
1968 | ctypeType = usymtab_lookupAbstractType (cstring_makeLiteralTemp ("ctype")); | |
1969 | } | |
1970 | } | |
1971 | ||
1972 | if (ctype_isUnknown (filelocType)) { | |
1973 | if (usymtab_existsType (cstring_makeLiteralTemp ("fileloc"))) | |
1974 | { | |
1975 | filelocType = usymtab_lookupAbstractType (cstring_makeLiteralTemp ("fileloc")); | |
1976 | } | |
1977 | } | |
1978 | ||
1979 | if (exprNode_isDefined (a) && exprNode_isStringLiteral (a) | |
1980 | && exprNode_knownStringValue (a)) | |
1981 | { | |
1982 | cstring format = multiVal_forceString (exprNode_getValue (a)); | |
1983 | char *code = cstring_toCharsSafe (format); | |
1984 | char *ocode = code; | |
1985 | ||
1986 | nargs = exprNodeList_size (args); | |
1987 | ||
1988 | while ((code = strchr (code, '%')) != NULL) | |
1989 | { | |
1990 | char *origcode = code; | |
1991 | char key = *(++code); | |
28bf4b0b | 1992 | cstring codetext = cstring_newEmpty (); |
616915dd | 1993 | bool isOnly = FALSE; |
1994 | ||
28bf4b0b | 1995 | codetext = cstring_appendChar (codetext, key); |
1996 | ||
616915dd | 1997 | fileloc_addColumn (formatloc, code - ocode); |
1998 | ||
1999 | while (key >= '0' && key <= '9') | |
2000 | { | |
2001 | key = *(++code); | |
28bf4b0b | 2002 | codetext = cstring_appendChar (codetext, key); |
616915dd | 2003 | fileloc_incColumn (formatloc); |
2004 | } | |
2005 | ||
2006 | ++code; | |
2007 | fileloc_incColumn (formatloc); | |
2008 | ||
2009 | if (key != '%') | |
2010 | { | |
28bf4b0b | 2011 | if (key == '&') /* plural marker */ |
616915dd | 2012 | { |
2013 | goto nextKey; | |
2014 | } | |
2015 | ||
2016 | if (i >= nargs) | |
2017 | { | |
2018 | voptgenerror | |
2019 | (FLG_TYPE, | |
28bf4b0b | 2020 | message ("Message missing format arg %d (%%%s): \"%s\"", |
2021 | i + 1, codetext, format), | |
616915dd | 2022 | f->loc); |
2023 | i++; | |
2024 | } | |
2025 | else | |
2026 | { | |
2027 | a = exprNodeList_getN (args, i); | |
2028 | i++; | |
2029 | ||
2030 | nextKey: | |
2031 | if (!exprNode_isError (a)) | |
2032 | { | |
2033 | ctype expecttype; | |
2034 | ||
2035 | /*@-loopswitchbreak@*/ | |
2036 | ||
2037 | switch (key) | |
2038 | { | |
2039 | case 'c': | |
2040 | case 'h': | |
2041 | expecttype = ctype_char; break; | |
2042 | case 's': | |
2043 | expecttype = cstringType; break; | |
2044 | case 'q': | |
2045 | expecttype = cstringType; isOnly = TRUE; break; | |
2046 | case 'x': | |
2047 | expecttype = cstringType; isOnly = TRUE; break; | |
2048 | case 'd': expecttype = ctype_int; break; | |
2049 | case 'u': expecttype = ctype_uint; break; | |
2050 | case 'w': expecttype = ctype_ulint; break; | |
2051 | case 'f': expecttype = ctype_float; break; | |
2052 | case 'b': expecttype = ctype_bool; break; | |
2053 | case 't': expecttype = ctypeType; break; | |
2054 | case 'l': expecttype = filelocType; break; | |
28bf4b0b | 2055 | case '&': /* a wee bit of a hack methinks */ |
616915dd | 2056 | expecttype = ctype_int; |
2057 | break; | |
2058 | case 'r': expecttype = ctype_bool; break; | |
2059 | default: | |
2060 | expecttype = ctype_unknown; | |
2061 | voptgenerror | |
2062 | (FLG_FORMATCODE, | |
2063 | message ("Unrecognized format code: %s", | |
2064 | cstring_fromChars (origcode)), | |
2065 | fileloc_isDefined (formatloc) | |
2066 | ? formatloc : g_currentloc); | |
2067 | break; | |
2068 | } | |
2069 | /*@=loopswitchbreak@*/ | |
2070 | ||
2071 | if (!(exprNode_matchArgType (expecttype, a))) | |
2072 | { | |
2073 | if (ctype_isVoidPointer (expecttype) | |
2074 | && ctype_isRealAbstract (a->typ) | |
2075 | && (context_getFlag (FLG_ABSTVOIDP))) | |
2076 | { | |
2077 | ; | |
2078 | } | |
2079 | else | |
2080 | { | |
2081 | if (llgenformattypeerror | |
2082 | (expecttype, exprNode_undefined, | |
2083 | a->typ, a, | |
28bf4b0b | 2084 | message ("Format argument %d to %q (%%%s) expects " |
616915dd | 2085 | "%t gets %t: %s", |
2086 | i - argno, | |
2087 | uentry_getName (fcn), | |
28bf4b0b | 2088 | codetext, expecttype, |
616915dd | 2089 | a->typ, exprNode_unparse (a)), |
2090 | a->loc)) | |
2091 | { | |
2092 | if (fileloc_isDefined (formatloc) | |
2093 | && context_getFlag (FLG_SHOWCOL)) | |
2094 | { | |
2095 | llgenindentmsg | |
2096 | (cstring_makeLiteral | |
2097 | ("Corresponding format code"), | |
2098 | formatloc); | |
2099 | } | |
2100 | } | |
2101 | } | |
2102 | } | |
2103 | ||
2104 | if (ctype_equal (expecttype, cstringType)) | |
2105 | { | |
2106 | if (isOnly) | |
2107 | { | |
2108 | checkOneArg (csOnlyArg, a, f, FALSE, i+1, nargs); | |
2109 | uentry_fixupSref (csOnlyArg); | |
2110 | } | |
2111 | else | |
2112 | { | |
2113 | checkOneArg (csArg, a, f, FALSE, i+1, nargs); | |
2114 | uentry_fixupSref (csArg); | |
2115 | } | |
2116 | } | |
2117 | else | |
2118 | { | |
2119 | checkOneArg (regArg, a, f, FALSE, i+1, nargs); | |
2120 | uentry_fixupSref (regArg); | |
2121 | } | |
2122 | } | |
2123 | } | |
2124 | } | |
28bf4b0b | 2125 | |
2126 | cstring_free (codetext); | |
616915dd | 2127 | } |
2128 | ||
2129 | if (i < nargs) | |
2130 | { | |
2131 | voptgenerror (FLG_TYPE, | |
28bf4b0b | 2132 | message ("Format string for %q has %d arg%&, given %d", |
616915dd | 2133 | uentry_getName (fcn), i - argno, nargs -argno), |
2134 | f->loc); | |
2135 | } | |
2136 | } | |
2137 | else | |
2138 | { | |
2139 | /* no checking possible for compile-time unknown format strings */ | |
2140 | } | |
2141 | ||
2142 | fileloc_free (formatloc); | |
2143 | } | |
2144 | ||
2145 | static void | |
2146 | checkExpressionDefinedAux (/*@notnull@*/ exprNode e1, | |
2147 | /*@notnull@*/ exprNode e2, | |
2148 | sRefSet sets1, | |
2149 | sRefSet sets2, | |
2150 | lltok op, | |
2151 | flagcode flag) | |
2152 | { | |
2153 | bool hadUncon = FALSE; | |
2154 | ||
28bf4b0b | 2155 | if (sRef_isFileOrGlobalScope (sRef_getRootBase (e1->sref)) && |
616915dd | 2156 | sRefSet_hasUnconstrained (sets2)) |
2157 | { | |
2158 | voptgenerror | |
2159 | (FLG_EVALORDERUNCON, | |
2160 | message | |
2161 | ("Expression may have undefined behavior (%q used in right operand " | |
2162 | "may set global variable %q used in left operand): %s %s %s", | |
2163 | sRefSet_unparseUnconstrained (sets2), | |
2164 | sRef_unparse (sRef_getRootBase (e1->sref)), | |
2165 | exprNode_unparse (e1), lltok_unparse (op), exprNode_unparse (e2)), | |
2166 | e2->loc); | |
2167 | } | |
2168 | ||
28bf4b0b | 2169 | if (sRef_isFileOrGlobalScope (sRef_getRootBase (e2->sref)) && |
616915dd | 2170 | sRefSet_hasUnconstrained (sets1)) |
2171 | { | |
2172 | voptgenerror | |
2173 | (FLG_EVALORDERUNCON, | |
2174 | message | |
2175 | ("Expression has undefined behavior (%q used in left operand " | |
2176 | "may set global variable %q used in right operand): %s %s %s", | |
2177 | sRefSet_unparseUnconstrained (sets1), | |
2178 | sRef_unparse (e2->sref), | |
2179 | exprNode_unparse (e1), lltok_unparse (op), exprNode_unparse (e2)), | |
2180 | e2->loc); | |
2181 | } | |
2182 | ||
2183 | sRefSet_realElements (e1->uses, sr) | |
2184 | { | |
2185 | if (sRef_isMeaningful (sr) && sRefSet_member (sets2, sr)) | |
2186 | { | |
2187 | voptgenerror | |
2188 | (FLG_EVALORDER, | |
2189 | message | |
2190 | ("Expression has undefined behavior (left operand uses %q, " | |
2191 | "modified by right operand): %s %s %s", | |
2192 | sRef_unparse (sr), | |
2193 | exprNode_unparse (e1), lltok_unparse (op), exprNode_unparse (e2)), | |
2194 | e2->loc); | |
2195 | } | |
2196 | } end_sRefSet_realElements; | |
2197 | ||
2198 | sRefSet_realElements (sets1, sr) | |
2199 | { | |
2200 | if (sRef_isMeaningful (sr)) | |
2201 | { | |
2202 | if (sRef_same (sr, e2->sref)) | |
2203 | { | |
2204 | voptgenerror | |
2205 | (flag, | |
2206 | message | |
2207 | ("Expression has undefined behavior (value of right operand " | |
2208 | "modified by left operand): %s %s %s", | |
2209 | exprNode_unparse (e1), lltok_unparse (op), exprNode_unparse (e2)), | |
2210 | e2->loc); | |
2211 | } | |
2212 | else if (sRefSet_member (e2->uses, sr)) | |
2213 | { | |
2214 | voptgenerror | |
2215 | (flag, | |
2216 | message | |
2217 | ("Expression has undefined behavior (left operand modifies %q, " | |
2218 | "used by right operand): %s %s %s", | |
2219 | sRef_unparse (sr), | |
2220 | exprNode_unparse (e1), lltok_unparse (op), exprNode_unparse (e2)), | |
2221 | e2->loc); | |
2222 | } | |
2223 | else | |
2224 | { | |
2225 | if (sRefSet_member (sets2, sr)) | |
2226 | { | |
2227 | if (sRef_isUnconstrained (sr)) | |
2228 | { | |
2229 | if (hadUncon) | |
2230 | { | |
2231 | ; | |
2232 | } | |
2233 | else | |
2234 | { | |
2235 | hadUncon = optgenerror | |
2236 | (FLG_EVALORDERUNCON, | |
2237 | message | |
2238 | ("Expression may have undefined behavior. Left operand " | |
2239 | "calls %q; right operand calls %q. The unconstrained " | |
2240 | "functions may modify global state used by " | |
2241 | "the other operand): %s %s %s", | |
2242 | sRefSet_unparseUnconstrained (sets1), | |
2243 | sRefSet_unparseUnconstrained (sets2), | |
2244 | exprNode_unparse (e1), lltok_unparse (op), | |
2245 | exprNode_unparse (e2)), | |
2246 | e2->loc); | |
2247 | } | |
2248 | } | |
2249 | else | |
2250 | { | |
2251 | voptgenerror | |
2252 | (flag, | |
2253 | message | |
2254 | ("Expression has undefined behavior (both " | |
2255 | "operands modify %q): %s %s %s", | |
2256 | sRef_unparse (sr), | |
2257 | exprNode_unparse (e1), | |
2258 | lltok_unparse (op), exprNode_unparse (e2)), | |
2259 | e2->loc); | |
2260 | } | |
2261 | } | |
2262 | } | |
2263 | } | |
2264 | } end_sRefSet_realElements; | |
2265 | } | |
2266 | ||
2267 | static void checkExpressionDefined (exprNode e1, exprNode e2, lltok op) | |
2268 | { | |
2269 | bool hasError = FALSE; | |
2270 | ||
2271 | if (exprNode_isError (e1) || exprNode_isError (e2)) | |
2272 | { | |
2273 | return; | |
2274 | } | |
2275 | ||
2276 | if (sRefSet_member (e2->sets, e1->sref)) | |
2277 | { | |
2278 | if (e2->kind == XPR_CALL) | |
2279 | { | |
2280 | ; | |
2281 | } | |
2282 | else | |
2283 | { | |
2284 | hasError = optgenerror | |
2285 | (FLG_EVALORDER, | |
2286 | message ("Expression has undefined behavior " | |
2287 | "(value of left operand is modified " | |
2288 | "by right operand): %s %s %s", | |
2289 | exprNode_unparse (e1), lltok_unparse (op), | |
2290 | exprNode_unparse (e2)), | |
2291 | e2->loc); | |
2292 | } | |
2293 | } | |
2294 | ||
2295 | if (context_getFlag (FLG_EVALORDERUNCON)) | |
2296 | { | |
2297 | if (sRefSet_member (e2->msets, e1->sref)) | |
2298 | { | |
2299 | if (e2->kind == XPR_CALL) | |
2300 | { | |
2301 | ; | |
2302 | } | |
2303 | else | |
2304 | { | |
2305 | hasError = optgenerror | |
2306 | (FLG_EVALORDER, | |
2307 | message | |
2308 | ("Expression has undefined behavior (value of left " | |
2309 | "operand may be modified by right operand): %s %s %s", | |
2310 | exprNode_unparse (e1), lltok_unparse (op), | |
2311 | exprNode_unparse (e2)), | |
2312 | e2->loc); | |
2313 | } | |
2314 | } | |
2315 | } | |
2316 | ||
2317 | if (!hasError) | |
2318 | { | |
2319 | checkExpressionDefinedAux (e1, e2, e1->sets, e2->sets, op, FLG_EVALORDER); | |
2320 | ||
2321 | if (context_maybeSet (FLG_EVALORDERUNCON)) | |
2322 | { | |
2323 | checkExpressionDefinedAux (e1, e2, e1->msets, | |
2324 | e2->msets, op, FLG_EVALORDERUNCON); | |
2325 | } | |
2326 | } | |
2327 | } | |
2328 | ||
2329 | static void checkSequencing (exprNode p_f, exprNodeList p_args); | |
2330 | ||
2331 | static int | |
2332 | checkArgsReal (uentry fcn, /*@dependent@*/ exprNode f, uentryList cl, | |
2333 | exprNodeList args, bool isIter, exprNode ret) | |
2334 | { | |
2335 | int special = 0; | |
2336 | ||
2337 | if (!exprNode_isError (f)) | |
2338 | { | |
2339 | if (!uentryList_isMissingParams (cl)) | |
2340 | { | |
2341 | int nargs = exprNodeList_size (args); | |
2342 | int expectargs = uentryList_size (cl); | |
2343 | ctype last; | |
2344 | int i = 0; | |
2345 | ||
2346 | if (expectargs == 0) | |
2347 | { | |
2348 | if (nargs != 0) | |
2349 | { | |
2350 | if (isIter) | |
2351 | { | |
2352 | voptgenerror | |
2353 | (FLG_TYPE, | |
2354 | message ("Iter %q invoked with %d args, " | |
2355 | "declared void", | |
2356 | uentry_getName (fcn), | |
2357 | nargs), | |
2358 | f->loc); | |
2359 | } | |
2360 | else | |
2361 | { | |
2362 | voptgenerror | |
2363 | (FLG_TYPE, | |
2364 | message ("Function %s called with %d args, " | |
2365 | "declared void", | |
2366 | exprNode_unparse (f), nargs), | |
2367 | f->loc); | |
2368 | } | |
2369 | } | |
2370 | return special; | |
2371 | } | |
2372 | ||
2373 | last = uentry_getType (uentryList_getN (cl, expectargs - 1)); | |
2374 | ||
2375 | exprNodeList_reset (args); | |
2376 | ||
2377 | uentryList_elements (cl, current) | |
2378 | { | |
2379 | ctype ct = uentry_getType (current); | |
2380 | exprNode a; | |
2381 | ||
2382 | if (ctype_isElips (ct)) | |
2383 | { | |
2384 | /* | |
2385 | ** do special checking for printf/scanf library functions | |
2386 | ** | |
2387 | ** this is kludgey code, just for handling the special case | |
2388 | ** | |
2389 | */ | |
2390 | ||
2391 | if (uentry_isPrintfLike (fcn)) | |
2392 | { | |
2393 | checkPrintfArgs (f, fcn, args, ret, i); | |
2394 | special = i; | |
2395 | } | |
2396 | else if (uentry_isScanfLike (fcn)) | |
2397 | { | |
2398 | checkScanfArgs (f, fcn, args, ret, i); | |
2399 | special = i; | |
2400 | } | |
2401 | else if (uentry_isMessageLike (fcn)) | |
2402 | { | |
2403 | checkMessageArgs (f, fcn, args, i); | |
2404 | special = i; | |
2405 | } | |
2406 | else | |
2407 | { | |
2408 | llassert (!uentry_isSpecialFunction (fcn)); | |
2409 | } | |
2410 | ||
2411 | nargs = expectargs; /* avoid errors */ | |
2412 | break; | |
2413 | } | |
2414 | else | |
2415 | { | |
2416 | if (i >= nargs) break; | |
2417 | ||
2418 | a = exprNodeList_current (args); | |
2419 | exprNodeList_advance (args); | |
2420 | ||
2421 | i++; | |
2422 | ||
2423 | if (exprNode_isError (a)) | |
2424 | { | |
2425 | ; | |
2426 | } | |
2427 | else | |
2428 | { | |
2429 | /* | |
2430 | probably necessary? I'm not sure about this one | |
2431 | checkMacroParen (a); | |
2432 | */ | |
2433 | ||
2434 | f->guards = guardSet_union (f->guards, a->guards); | |
2435 | ||
2436 | DPRINTF (("match arg: %s / %s", ctype_unparse (ct), ctype_unparse (a->typ))); | |
2437 | ||
2438 | if (!(exprNode_matchArgType (ct, a))) | |
2439 | { | |
2440 | DPRINTF (("Args mismatch!")); | |
2441 | ||
2442 | if (ctype_isVoidPointer (ct) | |
2443 | && (ctype_isPointer (a->typ) | |
2444 | && (ctype_isRealAbstract (ctype_baseArrayPtr (a->typ))))) | |
2445 | { | |
2446 | vnoptgenerror | |
2447 | (FLG_ABSTVOIDP, | |
2448 | message | |
2449 | ("Pointer to abstract type (%t) used " | |
2450 | "as void pointer " | |
2451 | "(arg %d to %q): %s", | |
2452 | a->typ, i, | |
2453 | uentry_getName (fcn), | |
2454 | exprNode_unparse (a)), | |
2455 | a->loc); | |
2456 | } | |
2457 | else | |
2458 | { | |
2459 | if (isIter) | |
2460 | { | |
2461 | (void) gentypeerror | |
2462 | (ct, exprNode_undefined, | |
2463 | a->typ, a, | |
2464 | message | |
2465 | ("Iter %q expects arg %d to " | |
2466 | "be %t gets %t: %s", | |
2467 | uentry_getName (fcn), | |
2468 | i, ct, a->typ, exprNode_unparse (a)), | |
2469 | a->loc); | |
2470 | } | |
2471 | else | |
2472 | { | |
2473 | if (gentypeerror | |
2474 | (ct, | |
2475 | exprNode_undefined, | |
2476 | a->typ, | |
2477 | a, | |
2478 | message | |
2479 | ("Function %q expects arg %d to be %t gets %t: %s", | |
2480 | uentry_getName (fcn), | |
2481 | i, ct, a->typ, exprNode_unparse (a)), | |
2482 | a->loc)) | |
2483 | { | |
2484 | DPRINTF (("Types: %s / %s", | |
2485 | ctype_unparse (ct), | |
2486 | ctype_unparse (a->typ))); | |
2487 | } | |
2488 | ||
2489 | /* | |
2490 | ** Clear null marker for abstract types. | |
2491 | ** (It is not revealed, so suppress future messages.) | |
2492 | */ | |
2493 | ||
2494 | if (ctype_isAbstract (a->typ)) | |
2495 | { | |
2496 | sRef_setNullUnknown (exprNode_getSref (a), a->loc); | |
2497 | } | |
2498 | } | |
2499 | } | |
2500 | } | |
2501 | } | |
2502 | } | |
2503 | } end_uentryList_elements ; | |
2504 | ||
2505 | ||
2506 | if (expectargs != nargs) /* note: not != since we may have ... */ | |
2507 | { | |
2508 | if (ctype_isElips (last)) | |
2509 | { | |
2510 | voptgenerror | |
2511 | (FLG_TYPE, | |
2512 | message ("Function %s called with %d args, expects at least %d", | |
2513 | exprNode_unparse (f), | |
2514 | nargs, expectargs - 1), | |
2515 | f->loc); | |
2516 | } | |
2517 | else | |
2518 | { | |
2519 | if (isIter) | |
2520 | { | |
2521 | voptgenerror | |
2522 | (FLG_TYPE, | |
2523 | message ("Iter %q invoked with %d args, expects %d", | |
2524 | uentry_getName (fcn), nargs, expectargs), | |
2525 | f->loc); | |
2526 | } | |
2527 | else | |
2528 | { | |
2529 | voptgenerror | |
2530 | (FLG_TYPE, | |
2531 | message ("Function %s called with %d args, expects %d", | |
2532 | exprNode_unparse (f), | |
2533 | nargs, expectargs), | |
2534 | f->loc); | |
2535 | } | |
2536 | } | |
2537 | } | |
2538 | } | |
2539 | } | |
2540 | ||
2541 | return special; | |
2542 | } | |
2543 | ||
2544 | /* | |
2545 | ** Check for undefined code sequences in function arguments: | |
2546 | ** | |
2547 | ** one parameter sets something used by another parameter | |
2548 | ** one parameter sets something set by another parameter | |
2549 | */ | |
2550 | ||
2551 | static void | |
2552 | checkSequencingOne (exprNode f, exprNodeList args, | |
2553 | /*@notnull@*/ exprNode el, int argno) | |
2554 | { | |
2555 | /* | |
2556 | ** Do second loop, iff +undefunspec | |
2557 | */ | |
2558 | ||
2559 | int checkloop; | |
2560 | int numloops = context_maybeSet (FLG_EVALORDERUNCON) ? 2 : 1; | |
2561 | ||
2562 | for (checkloop = 0; checkloop < numloops; checkloop++) | |
2563 | { | |
2564 | sRefSet thissets; | |
2565 | ||
2566 | if (checkloop == 0) | |
2567 | { | |
2568 | thissets = el->sets; | |
2569 | } | |
2570 | else | |
2571 | { | |
2572 | llassert (checkloop == 1); | |
2573 | thissets = el->msets; | |
2574 | } | |
2575 | ||
2576 | sRefSet_realElements (thissets, thisset) | |
2577 | { | |
2578 | int j; | |
2579 | ||
2580 | /*@access exprNodeList@*/ | |
2581 | for (j = 0; j < args->nelements; j++) | |
2582 | { | |
2583 | exprNode jl = args->elements[j]; | |
2584 | int thisargno = j + 1; | |
2585 | ||
2586 | if (thisargno != argno && exprNode_isDefined (jl)) | |
2587 | { | |
2588 | sRefSet otheruses = jl->uses; | |
2589 | ||
28bf4b0b | 2590 | if (sRef_isFileOrGlobalScope (sRef_getRootBase (jl->sref)) && |
616915dd | 2591 | sRefSet_hasUnconstrained (thissets)) |
2592 | { | |
2593 | voptgenerror | |
2594 | (FLG_EVALORDERUNCON, | |
2595 | /*@-sefparams@*/ | |
2596 | message | |
2597 | ("%q used in argument %d may set " | |
2598 | "global variable %q used by argument %d: %s(%q)", | |
2599 | cstring_capitalizeFree (sRefSet_unparseUnconstrained (thissets)), | |
2600 | /*@=sefparams@*/ | |
2601 | argno, | |
2602 | sRef_unparse (sRef_getRootBase (jl->sref)), | |
2603 | thisargno, | |
2604 | exprNode_unparse (f), exprNodeList_unparse (args)), | |
2605 | el->loc); | |
2606 | } | |
2607 | ||
2608 | if (sRefSet_member (otheruses, thisset)) | |
2609 | { | |
2610 | if (sRef_isUnconstrained (thisset)) | |
2611 | { | |
2612 | voptgenerror | |
2613 | (FLG_EVALORDERUNCON, | |
2614 | message | |
2615 | ("Unconstrained functions used in arguments %d (%q) " | |
2616 | "and %d (%s) may modify " | |
2617 | "or use global state in undefined way: %s(%q)", | |
2618 | argno, | |
2619 | sRefSet_unparseUnconstrainedPlain (otheruses), | |
2620 | thisargno, | |
2621 | sRef_unconstrainedName (thisset), | |
2622 | exprNode_unparse (f), | |
2623 | exprNodeList_unparse (args)), | |
2624 | el->loc); | |
2625 | } | |
2626 | else | |
2627 | { | |
2628 | voptgenerror | |
2629 | (FLG_EVALORDER, | |
2630 | message | |
2631 | ("Argument %d modifies %q, used by argument %d " | |
2632 | "(order of evaluation of actual parameters is " | |
2633 | "undefined): %s(%q)", | |
2634 | argno, sRef_unparse (thisset), thisargno, | |
2635 | exprNode_unparse (f), exprNodeList_unparse (args)), | |
2636 | el->loc); | |
2637 | } | |
2638 | } | |
2639 | else | |
2640 | { | |
2641 | sRefSet othersets = jl->sets; | |
2642 | ||
2643 | if (sRefSet_member (othersets, thisset)) | |
2644 | { | |
2645 | if (sRef_isUnconstrained (thisset)) | |
2646 | { | |
2647 | voptgenerror | |
2648 | (FLG_EVALORDERUNCON, | |
2649 | message | |
2650 | ("Unconstrained functions used in " | |
2651 | "arguments %d (%q) and %d (%s) may modify " | |
2652 | "or use global state in undefined way: %s(%q)", | |
2653 | argno, | |
2654 | sRefSet_unparseUnconstrainedPlain (othersets), | |
2655 | thisargno, | |
2656 | sRef_unconstrainedName (thisset), | |
2657 | exprNode_unparse (f), exprNodeList_unparse (args)), | |
2658 | el->loc); | |
2659 | } | |
2660 | else | |
2661 | { | |
2662 | voptgenerror | |
2663 | (FLG_EVALORDER, | |
2664 | message | |
2665 | ("Argument %d modifies %q, set by argument %d (order of" | |
2666 | " evaluation of actual parameters is undefined): %s(%q)", | |
2667 | argno, sRef_unparse (thisset), thisargno, | |
2668 | exprNode_unparse (f), exprNodeList_unparse (args)), | |
2669 | el->loc); | |
2670 | } | |
2671 | } | |
2672 | } | |
2673 | } | |
2674 | } | |
2675 | /*@noaccess exprNodeList@*/ | |
2676 | } end_sRefSet_realElements; | |
2677 | } | |
2678 | } | |
2679 | ||
2680 | static void | |
2681 | checkSequencing (exprNode f, exprNodeList args) | |
2682 | { | |
2683 | if (exprNodeList_size (args) > 1) | |
2684 | { | |
2685 | int i; | |
2686 | exprNode el; | |
2687 | ||
2688 | /*@access exprNodeList*/ | |
2689 | ||
2690 | for (i = 0; i < args->nelements; i++) | |
2691 | { | |
2692 | el = args->elements[i]; | |
2693 | ||
2694 | if (!exprNode_isError (el)) | |
2695 | { | |
2696 | checkSequencingOne (f, args, el, i + 1); | |
2697 | } | |
2698 | } | |
2699 | /*@noaccess exprNodeList*/ | |
2700 | } | |
2701 | } | |
2702 | ||
2703 | /* | |
2704 | ** requires le = exprNode_getUentry (f) | |
2705 | */ | |
2706 | ||
2707 | static void | |
2708 | checkGlobMods (/*@notnull@*/ /*@dependent@*/ exprNode f, | |
2709 | uentry le, exprNodeList args, | |
2710 | /*@notnull@*/ exprNode ret, int specialArgs) | |
2711 | { | |
2712 | bool isSpec = FALSE; | |
2713 | bool hasMods = FALSE; | |
2714 | cstring fname; | |
2715 | globSet usesGlobs = globSet_undefined; | |
2716 | sRefSet mods = sRefSet_undefined; | |
2717 | bool freshMods = FALSE; | |
2718 | uentryList params = uentryList_undefined; | |
2719 | ||
28bf4b0b | 2720 | DPRINTF (("Check glob mods: %s", exprNode_unparse (ret))); |
2721 | ||
616915dd | 2722 | /* |
2723 | ** check globals and modifies | |
2724 | */ | |
2725 | ||
2726 | setCodePoint (); | |
2727 | ||
2728 | if (!uentry_isValid (le)) | |
2729 | { | |
2730 | ctype fr = ctype_realType (f->typ); | |
2731 | ||
2732 | if (ctype_isFunction (fr)) | |
2733 | { | |
2734 | params = ctype_argsFunction (fr); | |
2735 | } | |
2736 | else | |
2737 | { | |
2738 | params = uentryList_missingParams; | |
2739 | } | |
2740 | ||
2741 | if (!context_getFlag (FLG_MODNOMODS) | |
2742 | && !context_getFlag (FLG_GLOBUNSPEC)) | |
2743 | { | |
28bf4b0b | 2744 | checkUnspecCall (f, params, args); |
616915dd | 2745 | } |
2746 | ||
2747 | return; | |
2748 | } | |
2749 | ||
2750 | fname = uentry_rawName (le); | |
2751 | ||
2752 | setCodePoint (); | |
2753 | ||
2754 | if (uentry_isFunction (le)) | |
2755 | { | |
2756 | params = uentry_getParams (le); | |
2757 | mods = uentry_getMods (le); | |
2758 | hasMods = uentry_hasMods (le); | |
2759 | usesGlobs = uentry_getGlobs (le); | |
2760 | isSpec = uentry_isSpecified (le); | |
2761 | } | |
2762 | else /* not a function */ | |
2763 | { | |
2764 | ctype ct = ctype_realType (uentry_getType (le)); | |
2765 | ||
2766 | llassertprint (uentry_isVar (le) && ctype_isFunction (ct), | |
2767 | ("checkModGlobs: uentry not a function: %s", | |
2768 | uentry_unparse (le))); | |
2769 | ||
2770 | params = ctype_argsFunction (ct); | |
28bf4b0b | 2771 | return; /*@32 ! remove this? */ |
616915dd | 2772 | } |
2773 | ||
2774 | /* | |
2775 | ** check globals | |
2776 | */ | |
2777 | ||
2778 | setCodePoint (); | |
616915dd | 2779 | |
2780 | globSet_allElements (usesGlobs, el) | |
2781 | { | |
2782 | if (sRef_isValid (el)) | |
2783 | { | |
2784 | if (sRef_isInternalState (el) || sRef_isSystemState (el)) | |
2785 | { | |
2786 | context_usedGlobal (el); | |
2787 | exprNode_checkUse (f, el, f->loc); | |
2788 | ||
2789 | if (context_checkInternalUse ()) | |
2790 | { | |
2791 | if (!context_globAccess (el)) | |
2792 | { | |
2793 | if (sRef_isSystemState (el) | |
2794 | && !context_getFlag (FLG_MODFILESYSTEM)) | |
2795 | { | |
2796 | ; | |
2797 | } | |
2798 | else | |
2799 | { | |
2800 | voptgenerror | |
2801 | (FLG_INTERNALGLOBS, | |
2802 | message | |
2803 | ("Called procedure %s may access %q, but " | |
2804 | "globals list does not include globals %s", | |
2805 | exprNode_unparse (f), | |
2806 | sRef_unparse (el), | |
2807 | cstring_makeLiteralTemp (sRef_isInternalState (el) | |
2808 | ? "internalState" | |
2809 | : "fileSystem")), | |
2810 | f->loc); | |
2811 | } | |
2812 | } | |
2813 | } | |
2814 | } | |
2815 | else if (sRef_isNothing (el) || sRef_isSpecState (el)) | |
2816 | { | |
2817 | ; | |
2818 | } | |
2819 | else | |
2820 | { | |
2821 | uentry gle = sRef_getUentry (el); | |
2822 | sRef sr = sRef_updateSref (el); | |
2823 | ||
2824 | if (sRef_isUndefGlob (el)) | |
2825 | { | |
2826 | sRef_setDefined (sr, f->loc); | |
2827 | exprNode_checkSet (f, sr); | |
2828 | } | |
2829 | else | |
2830 | { | |
2831 | /* | |
2832 | ** check definition | |
2833 | */ | |
2834 | ||
2835 | if (sRef_isAllocated (el)) | |
2836 | { | |
2837 | exprNode_checkSet (f, sr); | |
2838 | } | |
2839 | else | |
2840 | { | |
2841 | if (sRef_isStateUndefined (sr)) | |
2842 | { | |
2843 | voptgenerror | |
2844 | (FLG_GLOBSTATE, | |
2845 | message | |
2846 | ("%s %q used by function undefined before call: %s", | |
2847 | sRef_getScopeName (sr), | |
2848 | sRef_unparse (sr), | |
2849 | exprNode_unparse (f)), | |
2850 | f->loc); | |
2851 | sRef_setDefined (sr, f->loc); | |
2852 | } | |
2853 | exprNode_checkUse (f, sr, f->loc); | |
2854 | } | |
2855 | ||
2856 | checkGlobUse (gle, TRUE, f); | |
2857 | } | |
2858 | ||
2859 | if (sRef_isKilledGlob (el)) | |
2860 | { | |
2861 | sRef_kill (sr, f->loc); | |
2862 | context_usedGlobal (sr); | |
2863 | } | |
2864 | } | |
2865 | } | |
2866 | } end_globSet_allElements; | |
2867 | ||
2868 | /* | |
2869 | ** check modifies | |
2870 | */ | |
2871 | ||
2872 | if (context_hasMods () || context_getFlag (FLG_MODNOMODS)) | |
2873 | { | |
2874 | sRefSet smods = sRefSet_undefined; | |
2875 | ||
2876 | /* | |
2877 | ** NEED to check for modifies anything | |
2878 | */ | |
2879 | ||
2880 | /* | |
2881 | ** check each sRef that called function modifies (ml), is | |
2882 | ** modifiable by tl | |
2883 | */ | |
2884 | ||
2885 | setCodePoint (); | |
2886 | ||
2887 | sRefSet_allElements (mods, s) /* s is something which may be modified */ | |
2888 | { | |
28bf4b0b | 2889 | DPRINTF (("Check modify: %s", sRef_unparse (s))); |
2890 | ||
616915dd | 2891 | if (sRef_isKindSpecial (s)) |
2892 | { | |
2893 | if (sRef_isSpecInternalState (s)) | |
2894 | { | |
2895 | if (context_getFlag (FLG_MODINTERNALSTRICT)) | |
2896 | { | |
2897 | exprNode_checkCallModifyVal (s, args, f, ret); | |
2898 | } | |
2899 | else | |
2900 | { | |
2901 | sRefSet mmods = context_modList (); | |
2902 | ||
2903 | sRefSet_allElements (mmods, el) | |
2904 | { | |
2905 | if (sRef_isInternalState (el)) | |
2906 | { | |
2907 | sRef_setModified (el); | |
2908 | } | |
2909 | } end_sRefSet_allElements ; | |
2910 | } | |
2911 | } | |
2912 | else | |
2913 | { | |
2914 | exprNode_checkCallModifyVal (s, args, f, ret); | |
2915 | } | |
2916 | } | |
2917 | else | |
2918 | { | |
2919 | sRef rb = sRef_getRootBase (s); | |
2920 | ||
28bf4b0b | 2921 | if (sRef_isFileOrGlobalScope (rb)) |
616915dd | 2922 | { |
2923 | context_usedGlobal (rb); | |
2924 | } | |
2925 | ||
2926 | if (sRef_isFileStatic (s) | |
2927 | && !fileId_equal (fileloc_fileId (f->loc), | |
2928 | fileloc_fileId (uentry_whereDefined (le)))) | |
2929 | { | |
2930 | smods = sRefSet_insert (smods, s); | |
2931 | } | |
2932 | else | |
2933 | { | |
2934 | exprNode_checkCallModifyVal (s, args, f, ret); | |
2935 | } | |
2936 | } | |
2937 | } end_sRefSet_allElements; | |
2938 | ||
2939 | setCodePoint (); | |
2940 | ||
2941 | /* | |
2942 | ** Static elements in modifies set can have nasty consequences. | |
2943 | ** (I think...have not been able to reproduce a possible bug.) | |
2944 | */ | |
2945 | ||
2946 | if (!sRefSet_isDefined (smods)) | |
2947 | { | |
2948 | mods = sRefSet_newCopy (mods); | |
2949 | freshMods = TRUE; | |
2950 | ||
2951 | sRefSet_allElements (smods, el) | |
2952 | { | |
2953 | bool res = sRefSet_delete (mods, el); | |
2954 | ||
2955 | llassert (res); | |
2956 | } end_sRefSet_allElements; | |
2957 | ||
2958 | sRefSet_free (smods); | |
2959 | /*@-branchstate@*/ | |
2960 | } | |
2961 | /*@=branchstate@*/ | |
2962 | } | |
2963 | else if (sRefSet_isDefined (mods)) | |
2964 | { /* just check observers */ | |
2965 | setCodePoint (); | |
2966 | ||
2967 | sRefSet_allElements (mods, s) /* s is something which may be modified */ | |
2968 | { | |
2969 | sRef rb = sRef_getRootBase (s); | |
2970 | ||
2971 | setCodePoint (); | |
2972 | ||
2973 | if (sRef_isParam (rb)) | |
2974 | { | |
2975 | sRef b = sRef_fixBaseParam (s, args); | |
2976 | ||
2977 | if (sRef_isObserver (b)) | |
2978 | { | |
2979 | exprNode e = exprNodeList_nth (args, sRef_getParam (rb)); | |
2980 | ||
2981 | if (optgenerror | |
2982 | (FLG_MODOBSERVER, | |
2983 | message ("Function call may modify observer%q: %s", | |
2984 | sRef_unparsePreOpt (b), exprNode_unparse (e)), | |
2985 | exprNode_loc (e))) | |
2986 | { | |
2987 | sRef_showExpInfo (b); | |
2988 | } | |
2989 | } | |
2990 | } | |
2991 | } end_sRefSet_allElements; | |
2992 | } | |
2993 | else | |
2994 | { | |
2995 | if (!hasMods) /* no specified modifications */ | |
2996 | { | |
2997 | if (context_getFlag (FLG_MODOBSERVERUNCON)) | |
2998 | { | |
2999 | exprNodeList_elements (args, e) | |
3000 | { | |
3001 | if (exprNode_isDefined (e)) | |
3002 | { | |
3003 | sRef s = exprNode_getSref (e); | |
3004 | ||
3005 | if (sRef_isObserver (s) | |
3006 | && ctype_isMutable (sRef_getType (s))) | |
3007 | { | |
3008 | if (optgenerror | |
3009 | (FLG_MODOBSERVERUNCON, | |
3010 | message | |
3011 | ("Call to unconstrained function %s may modify observer%q: %s", | |
3012 | exprNode_unparse (f), | |
3013 | sRef_unparsePreOpt (s), exprNode_unparse (e)), | |
3014 | exprNode_loc (e))) | |
3015 | { | |
3016 | sRef_showExpInfo (s); | |
3017 | } | |
3018 | } | |
3019 | } | |
3020 | } end_exprNodeList_elements; | |
3021 | } | |
3022 | } | |
3023 | } | |
3024 | ||
3025 | checkAnyCall (f, fname, params, args, hasMods, mods, isSpec, specialArgs); | |
3026 | ||
3027 | ret->uses = sRefSet_union (ret->uses, f->uses); | |
3028 | ret->sets = sRefSet_union (ret->sets, f->sets); | |
3029 | ret->msets = sRefSet_union (ret->msets, f->msets); | |
3030 | ||
3031 | if (freshMods) | |
3032 | { | |
3033 | /* | |
3034 | ** Spurious errors reported, because lclint can't tell | |
3035 | ** mods must be fresh if freshMods is true. | |
3036 | */ | |
3037 | ||
3038 | /*@i@*/ sRefSet_free (mods); | |
3039 | } | |
3040 | ||
3041 | setCodePoint (); | |
3042 | } | |
3043 | ||
3044 | void checkGlobUse (uentry glob, bool isCall, /*@notnull@*/ exprNode e) | |
3045 | { | |
3046 | if (uentry_isVar (glob)) | |
3047 | { | |
3048 | if (context_inFunctionLike ()) | |
3049 | { | |
3050 | sRef sr = uentry_getSref (glob); | |
3051 | ||
3052 | context_usedGlobal (sr); | |
3053 | ||
3054 | if (context_checkGlobUse (glob)) | |
3055 | { | |
3056 | if (!context_globAccess (sr)) | |
3057 | { | |
3058 | if (isCall) | |
3059 | { | |
3060 | voptgenerror | |
3061 | (FLG_GLOBALS, | |
3062 | message ("Called procedure %s may access %s %q", | |
3063 | exprNode_unparse (e), | |
3064 | sRef_unparseScope (sr), | |
3065 | uentry_getName (glob)), | |
3066 | e->loc); | |
3067 | } | |
3068 | else | |
3069 | { | |
3070 | voptgenerror | |
3071 | (FLG_GLOBALS, | |
3072 | message ("Undocumented use of %s %s", | |
3073 | sRef_unparseScope (sr), | |
3074 | exprNode_unparse (e)), | |
3075 | e->loc); | |
3076 | } | |
3077 | } | |
3078 | } | |
3079 | } | |
3080 | } | |
3081 | else | |
3082 | { | |
3083 | llbug (message ("Global not variable: %q", uentry_unparse (glob))); | |
3084 | } | |
3085 | } | |
3086 | ||
28bf4b0b | 3087 | static void |
3088 | reflectEnsuresClause (uentry le, exprNode f, exprNodeList args) | |
3089 | { | |
3090 | DPRINTF (("Reflect ensures clause: %s(%s) / %s / %s", | |
3091 | exprNode_unparse (f), exprNodeList_unparse (args), | |
3092 | uentry_unparseFull (le), | |
3093 | stateClauseList_unparse (uentry_getStateClauseList (le)))); | |
3094 | ||
3095 | if (uentry_isValid (le) && uentry_isFunction (le)) | |
3096 | { | |
3097 | stateClauseList sclauses = uentry_getStateClauseList (le); | |
3098 | ||
3099 | if (stateClauseList_isDefined (sclauses)) | |
3100 | { | |
3101 | DPRINTF (("Reflect ensures: %s / %s / %s", | |
3102 | uentry_unparse (le), | |
3103 | exprNode_unparse (f), exprNodeList_unparse (args))); | |
3104 | ||
3105 | stateClauseList_elements (sclauses, cl) | |
3106 | { | |
3107 | if (stateClause_hasEnsures (cl)) | |
3108 | { | |
3109 | /* Same in usymtab.c:1904 */ | |
3110 | if (stateClause_setsMetaState (cl)) | |
3111 | { | |
3112 | qual q = stateClause_getMetaQual (cl); | |
3113 | annotationInfo ainfo = qual_getAnnotationInfo (q); | |
3114 | metaStateInfo minfo = annotationInfo_getState (ainfo); | |
3115 | cstring key = metaStateInfo_getName (minfo); | |
3116 | int mvalue = annotationInfo_getValue (ainfo); | |
3117 | ||
3118 | sRefSet osrs = sRefSet_undefined; | |
3119 | sRefSet srs; | |
3120 | ||
3121 | if (stateClause_isGlobal (cl)) | |
3122 | { | |
3123 | srs = sRefSet_single (usymtab_lookupGlobalMarker ()); | |
3124 | osrs = srs; | |
3125 | } | |
3126 | else | |
3127 | { | |
3128 | srs = stateClause_getRefs (cl); | |
3129 | } | |
3130 | ||
3131 | DPRINTF (("Reflect ensures clause: %s", stateClause_unparse (cl))); | |
3132 | ||
3133 | ||
3134 | DPRINTF (("Sets meta state! %s", stateClause_unparse (cl))); | |
3135 | ||
3136 | sRefSet_elements (srs, sel) | |
3137 | { | |
3138 | sRef s; | |
3139 | ||
3140 | if (sRef_isResult (sRef_getRootBase (sel))) | |
3141 | { | |
3142 | ; /*@i423 what do we do about results */ | |
3143 | } | |
3144 | else | |
3145 | { | |
3146 | s = sRef_fixBaseParam (sel, args); | |
3147 | DPRINTF (("Reflecting state clause on: %s / %s", | |
3148 | sRef_unparse (sel), sRef_unparse (s))); | |
3149 | ||
3150 | sRef_setMetaStateValueComplete (s, key, mvalue, exprNode_loc (f)); | |
3151 | } | |
3152 | } end_sRefSet_elements; | |
3153 | ||
3154 | sRefSet_free (osrs); | |
3155 | } | |
3156 | else | |
3157 | { | |
3158 | sRefSet srs = stateClause_getRefs (cl); | |
3159 | sRefModVal modf = stateClause_getEnsuresFunction (cl); | |
3160 | int eparam = stateClause_getStateParameter (cl); | |
3161 | ||
3162 | DPRINTF (("Reflect after clause: %s / %s", | |
3163 | stateClause_unparse (cl), | |
3164 | sRefSet_unparse (srs))); | |
3165 | ||
3166 | sRefSet_elements (srs, sel) | |
3167 | { | |
3168 | sRef s; | |
3169 | ||
3170 | DPRINTF (("elements: %s", sRef_unparse (sel))); | |
3171 | DPRINTF (("elements: %s", sRef_unparseFull (sel))); | |
3172 | ||
3173 | if (sRef_isResult (sRef_getRootBase (sel))) | |
3174 | { | |
3175 | ; /*@i423 what do we do about results */ | |
3176 | } | |
3177 | else | |
3178 | { | |
3179 | s = sRef_fixBaseParam (sel, args); | |
3180 | ||
3181 | DPRINTF (("elements: %s", sRef_unparse (s))); | |
3182 | DPRINTF (("elements: %s", sRef_unparseFull (s))); | |
3183 | ||
3184 | DPRINTF (("Reflecting state clause on: %s / %s", | |
3185 | sRef_unparse (sel), sRef_unparse (s))); | |
3186 | ||
3187 | modf (s, eparam, exprNode_loc (f)); | |
3188 | } | |
3189 | } end_sRefSet_elements; | |
3190 | } | |
3191 | } | |
ba45e1e4 | 3192 | } end_stateClauseList_elements ; |
3193 | } | |
3194 | ||
3195 | DPRINTF (("Here: %s / %s", | |
3196 | uentry_unparseFull (le), | |
3197 | bool_unparse (uentry_hasMetaStateEnsures (le)))); | |
3198 | ||
3199 | if (uentry_hasMetaStateEnsures (le)) | |
3200 | { | |
3201 | metaStateConstraint msc = uentry_getMetaStateEnsures (le); | |
3120b462 | 3202 | metaStateSpecifier msspec = metaStateConstraint_getSpecifier (msc); |
3203 | metaStateInfo msinfo = metaStateSpecifier_getMetaStateInfo (msspec); | |
3204 | metaStateExpression msexpr = metaStateConstraint_getExpression (msc); | |
3205 | cstring key = metaStateInfo_getName (msinfo); | |
3206 | sRef mlsr = metaStateSpecifier_getSref (msspec); | |
3207 | sRef s; | |
3208 | stateValue sval = stateValue_undefined; | |
3209 | ||
3210 | DPRINTF (("Meta state constraint for %s: %s", uentry_unparse (le), | |
ba45e1e4 | 3211 | metaStateConstraint_unparse (msc))); |
3120b462 | 3212 | DPRINTF (("Matches left: %s", sRef_unparseDebug (mlsr))); |
3213 | ||
3214 | if (sRef_isResult (sRef_getRootBase (mlsr))) | |
3215 | { | |
3216 | s = sRef_undefined; /*@i423 what about results? */ | |
3217 | } | |
3218 | else | |
3219 | { | |
3220 | s = sRef_fixBaseParam (mlsr, args); | |
3221 | DPRINTF (("Setting state: %s", sRef_unparseFull (s))); | |
3222 | } | |
3223 | ||
3224 | /* while (metaStateExpression_isDefined (msexpr)) */ | |
3225 | { | |
3226 | metaStateSpecifier ms = metaStateExpression_getSpecifier (msexpr); | |
3227 | sRef msr = metaStateSpecifier_getSref (ms); | |
3228 | metaStateInfo msi = metaStateSpecifier_getMetaStateInfo (ms); | |
3229 | sRef fs; | |
3230 | ||
3231 | if (metaStateInfo_isDefined (msi)) | |
3232 | { | |
3233 | /* Must match lhs state */ | |
3234 | llassert (metaStateInfo_equal (msinfo, msi)); | |
3235 | } | |
3236 | ||
3237 | llassert (sRef_isParam (sRef_getRootBase (msr))); | |
3238 | fs = sRef_fixBaseParam (msr, args); | |
3239 | ||
3240 | sval = sRef_getMetaStateValue (fs, key); | |
3241 | } | |
ba45e1e4 | 3242 | |
3120b462 | 3243 | DPRINTF (("Setting: %s:%s <- %s", sRef_unparse (s), key, stateValue_unparse (sval))); |
3244 | sRef_setMetaStateValueComplete (s, key, stateValue_getValue (sval), exprNode_loc (f)); | |
28bf4b0b | 3245 | } |
3246 | } | |
3247 | } | |
3248 | ||
3249 | static void | |
3250 | checkRequiresClause (uentry le, exprNode f, exprNodeList args) | |
3251 | { | |
3252 | DPRINTF (("Check requires clause: %s(%s) / %s / %s", | |
3253 | exprNode_unparse (f), exprNodeList_unparse (args), | |
3254 | uentry_unparseFull (le), | |
3255 | stateClauseList_unparse (uentry_getStateClauseList (le)))); | |
3256 | ||
3257 | if (uentry_isValid (le) && uentry_isFunction (le)) | |
3258 | { | |
3259 | stateClauseList sclauses = uentry_getStateClauseList (le); | |
3260 | ||
3261 | if (stateClauseList_isDefined (sclauses)) | |
3262 | { | |
3263 | DPRINTF (("Check requires: %s / %s / %s", | |
3264 | uentry_unparse (le), | |
3265 | exprNode_unparse (f), exprNodeList_unparse (args))); | |
3266 | ||
3267 | stateClauseList_elements (sclauses, cl) | |
3268 | { | |
3269 | DPRINTF (("Check clause: %s / %s", | |
3270 | stateClause_unparse (cl), | |
3271 | bool_unparse (stateClause_hasRequires (cl)))); | |
3272 | ||
3273 | if (stateClause_hasRequires (cl)) | |
3274 | { | |
3275 | sRefSet osrs = sRefSet_undefined; | |
3276 | sRefSet srs; | |
3277 | ||
3278 | if (stateClause_isGlobal (cl)) | |
3279 | { | |
3280 | srs = sRefSet_single (usymtab_lookupGlobalMarker ()); | |
3281 | osrs = srs; | |
3282 | } | |
3283 | else | |
3284 | { | |
3285 | srs = stateClause_getRefs (cl); | |
3286 | } | |
3287 | ||
3288 | DPRINTF (("Refs: %s", sRefSet_unparse (srs))); | |
3289 | ||
3290 | if (stateClause_setsMetaState (cl)) | |
3291 | { | |
3292 | qual q = stateClause_getMetaQual (cl); | |
3293 | annotationInfo ainfo = qual_getAnnotationInfo (q); | |
3294 | metaStateInfo minfo = annotationInfo_getState (ainfo); | |
3295 | cstring key = metaStateInfo_getName (minfo); | |
3296 | int mvalue = annotationInfo_getValue (ainfo); | |
3297 | ||
3298 | DPRINTF (("Requires meta state! %s = %d", key, mvalue)); | |
3299 | ||
3300 | sRefSet_elements (srs, sel) | |
3301 | { | |
3302 | sRef s = sRef_fixBaseParam (sel, args); | |
3303 | ||
3304 | if (sRef_isResult (sRef_getRootBase (sel))) | |
3305 | { | |
3306 | ; /*@i423 what do we do about results */ | |
3307 | } | |
3308 | else | |
3309 | { | |
3310 | DPRINTF (("Checking state clause on: %s / %s / %s = %d", | |
3311 | sRef_unparseFull (sel), sRef_unparseFull (s), | |
3312 | key, mvalue)); | |
3313 | ||
3314 | if (!sRef_checkMetaStateValue (s, key, mvalue)) | |
3315 | { | |
3316 | DPRINTF (("HERE: %s", sRef_unparse (s))); | |
3317 | if (optgenerror | |
3318 | (FLG_STATETRANSFER, | |
3319 | message | |
990ec868 | 3320 | ("Requires clause of called function %q not satisfied%q (state is %q): %q", |
28bf4b0b | 3321 | uentry_getName (le), |
3322 | sRef_isGlobalMarker (s) | |
3323 | ? message ("") | |
3324 | : message (" by %q", sRef_unparse (s)), | |
3325 | stateValue_unparseValue (sRef_getMetaStateValue (s, key), | |
3326 | minfo), | |
3327 | stateClause_unparse (cl)), | |
3328 | exprNode_loc (f))) | |
3329 | { | |
3330 | sRef_showAliasInfo (s); | |
3331 | } | |
3332 | else | |
3333 | { | |
3334 | DPRINTF (("Error supressed!")); | |
3335 | DPRINTF (("Loc: %s", fileloc_unparse (exprNode_loc (f)))); | |
3336 | DPRINTF (("Context supress: %s", | |
3337 | bool_unparse (context_suppressFlagMsg (FLG_STATETRANSFER, exprNode_loc (f))))); | |
3338 | } | |
3339 | } | |
3340 | } | |
3341 | } end_sRefSet_elements; | |
3342 | } | |
3343 | else | |
3344 | { | |
3345 | sRefModVal modf = stateClause_getRequiresBodyFunction (cl); | |
3346 | int eparam = stateClause_getStateParameter (cl); | |
3347 | ||
3348 | DPRINTF (("Reflect after clause: %s / %s", | |
3349 | stateClause_unparse (cl), | |
3350 | sRefSet_unparse (srs))); | |
3351 | ||
3352 | sRefSet_elements (srs, sel) | |
3353 | { | |
3354 | sRef s; | |
3355 | ||
3356 | DPRINTF (("elements: %s", sRef_unparse (sel))); | |
3357 | DPRINTF (("elements: %s", sRef_unparseFull (sel))); | |
3358 | ||
3359 | s = sRef_fixBaseParam (sel, args); | |
3360 | ||
3361 | DPRINTF (("elements: %s", sRef_unparse (s))); | |
3362 | DPRINTF (("elements: %s", sRef_unparseFull (s))); | |
3363 | ||
3364 | if (sRef_isResult (sRef_getRootBase (sel))) | |
3365 | { | |
3366 | ; /*@i423 what do we do about results */ | |
3367 | } | |
3368 | else | |
3369 | { | |
3370 | DPRINTF (("Reflecting state clause on: %s / %s", | |
3371 | sRef_unparse (sel), sRef_unparse (s))); | |
3372 | ||
3373 | modf (s, eparam, exprNode_loc (f)); | |
3374 | } | |
3375 | } end_sRefSet_elements; | |
3376 | } | |
3377 | ||
3378 | sRefSet_free (osrs); | |
3379 | } | |
3380 | } end_stateClauseList_elements ; | |
3381 | } | |
3382 | } | |
3383 | } | |
3384 | ||
616915dd | 3385 | static /*@only@*/ exprNode |
3386 | functionCallSafe (/*@only@*/ /*@notnull@*/ exprNode f, | |
3387 | ctype t, /*@keep@*/ exprNodeList args) | |
3388 | { | |
3389 | /* requires f is a non-error exprNode, with type function */ | |
3390 | cstring fname = exprNode_unparse (f); | |
3391 | uentry le = exprNode_getUentry (f); | |
3392 | exprNode ret = exprNode_createPartialCopy (f); | |
3393 | int special; | |
3394 | ||
3395 | setCodePoint (); | |
28bf4b0b | 3396 | |
3397 | DPRINTF (("Call: %s %s",exprNode_unparse (f), exprNodeList_unparse (args))); | |
3398 | ||
3399 | ret->typ = ctype_getReturnType (t); | |
616915dd | 3400 | ret->kind = XPR_CALL; |
3401 | ||
3402 | ret->edata = exprData_makeCall (f, args); | |
3403 | ||
3404 | /* | |
3405 | ** Order of these steps is very important! | |
3406 | ** | |
3407 | ** Must check for argument dependencies before messing up uses and sets. | |
3408 | */ | |
3409 | ||
3410 | if (context_getFlag (FLG_EVALORDER)) | |
3411 | { | |
3412 | exprNodeList_elements (args, current) | |
3413 | { | |
3414 | if (exprNode_isDefined (current)) | |
3415 | { | |
3416 | exprNode_addUse (current, current->sref); | |
3417 | } | |
3418 | } end_exprNodeList_elements; | |
3419 | ||
3420 | if (context_maybeSet (FLG_EVALORDER) || context_maybeSet (FLG_EVALORDERUNCON)) | |
3421 | { | |
3422 | checkSequencing (f, args); | |
3423 | } | |
3424 | ||
3425 | exprNodeList_elements (args, current) | |
3426 | { | |
3427 | if (exprNode_isDefined (current) && sRef_isMeaningful (current->sref)) | |
3428 | { | |
3429 | exprNode_addUse (ret, sRef_makeDerived (current->sref)); | |
3430 | } | |
3431 | } end_exprNodeList_elements ; | |
3432 | } | |
3433 | ||
3434 | special = checkArgs (le, f, t, args, ret); | |
3435 | checkGlobMods (f, le, args, ret, special); | |
28bf4b0b | 3436 | checkRequiresClause (le, f, args); |
3437 | setCodePoint (); | |
616915dd | 3438 | |
28bf4b0b | 3439 | DPRINTF (("Reflect: %s", uentry_unparseFull (le))); |
3440 | reflectEnsuresClause (le, f, args); | |
616915dd | 3441 | setCodePoint (); |
3442 | ||
3443 | if (uentry_isValid (le) | |
3444 | && (uentry_isFunction (le) | |
3445 | || (uentry_isVariable (le) | |
3446 | && ctype_isFunction (uentry_getType (le))))) | |
3447 | { | |
3448 | exitkind exk = uentry_getExitCode (le); | |
3449 | ||
3450 | /* f->typ is already set to the return type */ | |
3451 | ||
3452 | ret->sref = uentry_returnedRef (le, args); | |
28bf4b0b | 3453 | DPRINTF (("Returned: %s / %s", |
3454 | uentry_unparseFull (le), | |
3455 | sRef_unparseFull (ret->sref))); | |
616915dd | 3456 | |
3457 | if (uentry_isFunction (le) && exprNodeList_size (args) >= 1) | |
3458 | { | |
3459 | qual nullPred = uentry_nullPred (le); | |
3460 | ||
3461 | if (qual_isTrueNull (nullPred)) | |
3462 | { | |
3463 | exprNode arg = exprNodeList_head (args); | |
3464 | ||
3465 | if (exprNode_isDefined (arg)) | |
3466 | { | |
3467 | ret->guards = guardSet_addFalseGuard (ret->guards, arg->sref); | |
3468 | } | |
3469 | } | |
3470 | else if (qual_isFalseNull (nullPred)) | |
3471 | { | |
3472 | exprNode arg = exprNodeList_head (args); | |
3473 | ||
3474 | if (exprNode_isDefined (arg)) | |
3475 | { | |
3476 | ret->guards = guardSet_addTrueGuard (ret->guards, arg->sref); | |
3477 | } | |
3478 | } | |
3479 | else | |
3480 | { | |
3481 | llassert (qual_isUnknown (nullPred)); | |
3482 | } | |
3483 | } | |
3484 | ||
3485 | if (exitkind_isConditionalExit (exk)) | |
3486 | { | |
3487 | /* | |
3488 | ** True exit is: | |
3489 | ** if (arg0) then { exit! } else { ; } | |
3490 | ** False exit is: | |
3491 | ** if (arg0) then { ; } else { exit! } | |
3492 | */ | |
3493 | ||
3494 | exprNode firstArg; | |
3495 | ||
3496 | llassert (!exprNodeList_isEmpty (args)); | |
3497 | firstArg = exprNodeList_head (args); | |
3498 | ||
3499 | if (exprNode_isDefined (firstArg) | |
3500 | && !guardSet_isEmpty (firstArg->guards)) | |
3501 | { | |
3502 | usymtab_trueBranch (guardSet_undefined); | |
3503 | usymtab_altBranch (guardSet_undefined); | |
3504 | ||
3505 | if (exitkind_isTrueExit (exk)) | |
3506 | { | |
3507 | usymtab_popBranches (firstArg, | |
3508 | exprNode_makeMustExit (), | |
3509 | exprNode_undefined, | |
3510 | TRUE, TRUEEXITCLAUSE); | |
3511 | } | |
3512 | else | |
3513 | { | |
3514 | usymtab_popBranches (firstArg, | |
3515 | exprNode_undefined, | |
3516 | exprNode_makeMustExit (), | |
3517 | TRUE, FALSEEXITCLAUSE); | |
3518 | } | |
3519 | } | |
3520 | ||
3521 | ret->exitCode = XK_MAYEXIT; | |
3522 | } | |
3523 | else if (exitkind_mustExit (exk)) | |
3524 | { | |
3525 | ret->exitCode = XK_MUSTEXIT; | |
3526 | } | |
3527 | else if (exitkind_couldExit (exk)) | |
3528 | { | |
3529 | ret->exitCode = XK_MAYEXIT; | |
3530 | } | |
3531 | else | |
3532 | { | |
3533 | ; | |
3534 | } | |
3535 | ||
3536 | if (cstring_equalLit (fname, "exit")) | |
3537 | { | |
3538 | if (exprNodeList_size (args) == 1) | |
3539 | { | |
3540 | exprNode arg = exprNodeList_head (args); | |
3541 | ||
3542 | if (exprNode_isDefined (arg) && exprNode_knownIntValue (arg)) | |
3543 | { | |
3544 | long int val = multiVal_forceInt (exprNode_getValue (arg)); | |
3545 | ||
3546 | if (val != 0) | |
3547 | { | |
3548 | voptgenerror | |
3549 | (FLG_EXITARG, | |
3550 | message | |
3551 | ("Argument to exit has implementation defined behavior: %s", | |
3552 | exprNode_unparse (arg)), | |
3553 | exprNode_loc (arg)); | |
3554 | } | |
3555 | } | |
3556 | } | |
3557 | } | |
3558 | } | |
3559 | else | |
3560 | { | |
3561 | ret->sref = defref; | |
3562 | exprNode_checkSetAny (ret, uentry_rawName (le)); | |
3563 | } | |
3564 | ||
3565 | return (ret); | |
3566 | } | |
3567 | ||
3568 | /* | |
3569 | ** this is yucky! should keep the uentry as part of exprNode! | |
3570 | */ | |
3571 | ||
3572 | /*@observer@*/ uentry | |
3573 | exprNode_getUentry (exprNode e) | |
3574 | { | |
3575 | if (exprNode_isError (e)) | |
3576 | { | |
3577 | return uentry_undefined; | |
3578 | } | |
3579 | else | |
3580 | { | |
3581 | cstring s = exprNode_rootVarName (e); | |
3582 | uentry ue = usymtab_lookupSafe (s); | |
3583 | ||
3584 | return ue; | |
3585 | } | |
3586 | } | |
3587 | ||
3588 | exprNode | |
3589 | exprNode_makeInitBlock (lltok brace, /*@only@*/ exprNodeList inits) | |
3590 | { | |
3591 | exprNode ret = exprNode_createPlain (ctype_unknown); | |
3592 | ||
3593 | ret->kind = XPR_INITBLOCK; | |
3594 | ret->edata = exprData_makeCall (exprNode_undefined, inits); | |
3595 | ret->loc = fileloc_update (ret->loc, lltok_getLoc (brace)); | |
3596 | ||
3597 | return (ret); | |
3598 | } | |
3599 | ||
3600 | exprNode | |
3601 | exprNode_functionCall (/*@only@*/ exprNode f, /*@only@*/ exprNodeList args) | |
3602 | { | |
3603 | ctype t; | |
3604 | ||
3605 | setCodePoint (); | |
3606 | ||
3607 | if (exprNode_isUndefined (f)) | |
3608 | { | |
3609 | exprNode_free (f); | |
3610 | exprNodeList_free (args); | |
3611 | return exprNode_undefined; | |
3612 | } | |
3613 | ||
3614 | t = exprNode_getType (f); | |
3615 | ||
3616 | if (sRef_isLocalVar (f->sref)) | |
3617 | { | |
3618 | exprNode_checkUse (f, f->sref, f->loc); | |
3619 | ||
3620 | if (sRef_possiblyNull (f->sref)) | |
3621 | { | |
3622 | if (!usymtab_isGuarded (f->sref)) | |
3623 | { | |
3624 | if (optgenerror (FLG_NULLDEREF, | |
3625 | message ("Function call using %s pointer %q", | |
3626 | sRef_nullMessage (f->sref), | |
3627 | sRef_unparse (f->sref)), | |
3628 | f->loc)) | |
3629 | { | |
3630 | sRef_showNullInfo (f->sref); | |
3631 | sRef_setNullError (f->sref); | |
3632 | } | |
3633 | } | |
3634 | } | |
3635 | } | |
3636 | ||
3637 | setCodePoint (); | |
3638 | ||
3639 | if (ctype_isRealFunction (t)) | |
3640 | { | |
3641 | exprNode ret = functionCallSafe (f, t, args); | |
3642 | setCodePoint (); | |
3643 | return ret; | |
3644 | } | |
3645 | else if (ctype_isUnknown (t)) | |
3646 | { | |
3647 | exprNode ret = exprNode_createPartialCopy (f); | |
3648 | cstring tstring; | |
3649 | ||
3650 | setCodePoint (); | |
3651 | ||
3652 | ret->typ = t; | |
3653 | exprNodeList_elements (args, current) | |
3654 | { | |
3655 | if (exprNode_isDefined (current)) | |
3656 | { | |
3657 | exprNode_checkUse (ret, current->sref, ret->loc); | |
3658 | ||
3659 | /* | |
3660 | ** also, anything derivable from current->sref may be used | |
3661 | */ | |
3662 | ||
3663 | exprNode_addUse (ret, sRef_makeDerived (current->sref)); | |
3664 | exprNode_mergeUSs (ret, current); | |
3665 | } | |
3666 | } end_exprNodeList_elements; | |
3667 | ||
3668 | ret->edata = exprData_makeCall (f, args); | |
3669 | ret->kind = XPR_CALL; | |
3670 | ||
3671 | tstring = cstring_copy (exprNode_unparse (f)); | |
3672 | ||
3673 | cstring_markOwned (tstring); | |
3674 | exprNode_checkSetAny (ret, tstring); | |
3675 | ||
3676 | return (ret); | |
3677 | } | |
3678 | else | |
3679 | { | |
3680 | voptgenerror (FLG_TYPE, | |
3681 | message ("Call to non-function (type %t): %s", t, | |
3682 | exprNode_unparse (f)), | |
3683 | f->loc); | |
3684 | exprNode_free (f); | |
3685 | exprNodeList_free (args); | |
3686 | ||
3687 | return (exprNode_makeError ()); | |
3688 | } | |
3689 | } | |
3690 | ||
28bf4b0b | 3691 | static exprNode |
3692 | exprNode_fieldAccessAux (/*@only@*/ exprNode s, /*@observer@*/ fileloc loc, | |
3693 | /*@only@*/ cstring f) | |
616915dd | 3694 | { |
3695 | exprNode ret = exprNode_createPartialCopy (s); | |
3696 | ||
3697 | ret->kind = XPR_FACCESS; | |
3698 | ||
3699 | if (exprNode_isError (s)) | |
3700 | { | |
3701 | ret->edata = exprData_makeField (s, f); | |
3702 | return ret; | |
3703 | } | |
3704 | else | |
3705 | { | |
3706 | ctype t = exprNode_getType (s); | |
3707 | ctype tr = ctype_realType (t); | |
28bf4b0b | 3708 | |
616915dd | 3709 | checkMacroParen (s); |
3710 | ||
3711 | ret->edata = exprData_makeField (s, f); | |
28bf4b0b | 3712 | |
616915dd | 3713 | if (ctype_isStructorUnion (tr)) |
3714 | { | |
3715 | uentry tf = uentryList_lookupField (ctype_getFields (tr), f); | |
3716 | ||
3717 | if (uentry_isUndefined (tf)) | |
3718 | { | |
3719 | voptgenerror (FLG_TYPE, | |
3720 | message ("Access non-existent field %s of %t: %s", f, t, | |
3721 | exprNode_unparse (ret)), | |
28bf4b0b | 3722 | loc); |
3723 | /*! cstring_free (f); */ /* evans 2001-03-25 self-detect */ | |
616915dd | 3724 | return (ret); |
3725 | } | |
3726 | else | |
3727 | { | |
3728 | uentry_setUsed (tf, exprNode_loc (ret)); | |
3729 | ||
3730 | ret->typ = uentry_getType (tf); | |
3731 | checkSafeUse (ret, s->sref); | |
3732 | ||
3733 | ret->sref = sRef_makeField (s->sref, uentry_rawName (tf)); | |
28bf4b0b | 3734 | /*!? exprNode_free (s); */ /* evans 2001-03-25 self-detect */ |
616915dd | 3735 | return (ret); |
3736 | } | |
3737 | } | |
3738 | else /* isStructorUnion */ | |
3739 | { | |
3740 | if (ctype_isRealAbstract (tr)) | |
3741 | { | |
3742 | voptgenerror | |
3743 | (FLG_ABSTRACT, | |
3744 | message ("Access field of abstract type (%t): %s.%s", | |
3745 | t, exprNode_unparse (s), f), | |
28bf4b0b | 3746 | loc); |
616915dd | 3747 | ret->typ = ctype_unknown; |
3748 | } | |
3749 | else | |
3750 | { | |
3751 | if (ctype_isKnown (tr)) | |
3752 | { | |
3753 | voptgenerror | |
3754 | (FLG_TYPE, | |
3755 | message | |
3756 | ("Access field of non-struct or union (%t): %s.%s", | |
3757 | t, exprNode_unparse (s), f), | |
28bf4b0b | 3758 | loc); |
616915dd | 3759 | |
3760 | ret->typ = ctype_unknown; | |
3761 | } | |
3762 | else | |
3763 | { | |
3764 | cstring sn = cstring_copy (f); | |
28bf4b0b | 3765 | |
616915dd | 3766 | checkSafeUse (ret, s->sref); |
3767 | cstring_markOwned (sn); | |
3768 | ret->sref = sRef_makeField (s->sref, sn); | |
616915dd | 3769 | return (ret); |
3770 | } | |
3771 | } | |
28bf4b0b | 3772 | |
616915dd | 3773 | return (ret); |
3774 | } | |
3775 | } | |
3776 | BADEXIT; | |
3777 | } | |
3778 | ||
28bf4b0b | 3779 | exprNode |
3780 | exprNode_fieldAccess (/*@only@*/ exprNode s, /*@only@*/ lltok dot, | |
3781 | /*@only@*/ cstring f) | |
3782 | { | |
3783 | exprNode res = exprNode_fieldAccessAux (s, lltok_getLoc (dot), f); | |
3784 | lltok_release (dot); | |
3785 | return res; | |
3786 | } | |
3787 | ||
616915dd | 3788 | exprNode |
3789 | exprNode_addParens (/*@only@*/ lltok lpar, /*@only@*/ exprNode e) | |
3790 | { | |
3791 | exprNode ret = exprNode_createPartialCopy (e); | |
3792 | ||
3793 | ret->loc = fileloc_update (ret->loc, lltok_getLoc (lpar)); | |
3794 | ret->kind = XPR_PARENS; | |
3795 | ret->edata = exprData_makeUop (e, lpar); | |
3796 | ||
3797 | if (!exprNode_isError (e)) | |
3798 | { | |
3799 | ret->exitCode = e->exitCode; | |
3800 | ret->canBreak = e->canBreak; | |
3801 | ret->mustBreak = e->mustBreak; | |
3802 | ret->isJumpPoint = e->isJumpPoint; | |
3803 | ret->sref = e->sref; | |
3804 | } | |
3805 | ||
3806 | return ret; | |
3807 | } | |
3808 | ||
28bf4b0b | 3809 | static exprNode |
3810 | exprNode_arrowAccessAux (/*@only@*/ exprNode s, /*@observer@*/ fileloc loc, | |
3811 | /*@only@*/ cstring f) | |
616915dd | 3812 | { |
3813 | exprNode ret = exprNode_createPartialCopy (s); | |
3814 | ||
3815 | ret->edata = exprData_makeField (s, f); | |
3816 | ret->kind = XPR_ARROW; | |
28bf4b0b | 3817 | |
616915dd | 3818 | if (exprNode_isError (s)) |
3819 | { | |
3820 | return (ret); | |
3821 | } | |
3822 | else | |
3823 | { | |
28bf4b0b | 3824 | ctype t = exprNode_getType (s); |
3825 | ctype tr = ctype_realType (t); | |
3826 | ||
3827 | checkMacroParen (s); | |
3828 | ||
3829 | (void) ctype_fixArrayPtr (tr); /* REWRITE THIS */ | |
3830 | ||
3831 | if (ctype_isRealPointer (tr)) | |
3832 | { | |
3833 | ctype b = ctype_realType (ctype_baseArrayPtr (tr)); | |
3834 | ||
3835 | if (ctype_isStructorUnion (b)) | |
3836 | { | |
3837 | uentry fentry = uentryList_lookupField (ctype_getFields (b), f); | |
3838 | ||
3839 | if (sRef_isKnown (s->sref) && sRef_possiblyNull (s->sref)) | |
3840 | { | |
3841 | if (!usymtab_isGuarded (s->sref) && !context_inProtectVars ()) | |
3842 | { | |
3843 | if (optgenerror | |
3844 | (FLG_NULLDEREF, | |
3845 | message ("Arrow access from %s pointer%q: %s", | |
3846 | sRef_nullMessage (s->sref), | |
3847 | sRef_unparsePreOpt (s->sref), | |
3848 | exprNode_unparse (ret)), | |
3849 | loc)) | |
3850 | { | |
3851 | sRef_showNullInfo (s->sref); | |
3852 | sRef_setNullError (s->sref); | |
3853 | } | |
3854 | } | |
3855 | } | |
3856 | ||
3857 | if (uentry_isUndefined (fentry)) | |
3858 | { | |
3859 | voptgenerror | |
3860 | (FLG_TYPE, | |
3861 | message ("Access non-existent field %s of %t: %s", | |
3862 | f, t, exprNode_unparse (ret)), | |
3863 | loc); | |
3864 | ret->typ = ctype_unknown; | |
3865 | return (ret); | |
3866 | } | |
3867 | else | |
3868 | { | |
3869 | /* | |
3870 | ** was safeUse: shouldn't be safe! | |
3871 | ** | |
3872 | ** to do rec->field | |
3873 | ** rec must be defined, | |
3874 | ** *rec must be allocated | |
3875 | ** rec->field need only be defined it if is an rvalue | |
3876 | */ | |
3877 | ||
3878 | uentry_setUsed (fentry, exprNode_loc (ret)); | |
3879 | ret->typ = uentry_getType (fentry); | |
3880 | ||
3881 | exprNode_checkUse (ret, s->sref, s->loc); | |
3882 | ||
3883 | /* exprNode_checkUse (ret, sRef_makePointer (s->sref), s->loc); */ | |
3884 | ret->sref = sRef_makeArrow (s->sref, uentry_rawName (fentry)); | |
3885 | return (ret); | |
3886 | } | |
3887 | } | |
3888 | else /* Pointer to something that is not a struct or union*/ | |
3889 | { | |
3890 | if (ctype_isRealAbstract (tr)) | |
3891 | { | |
3892 | ctype xrt = ctype_forceRealType (tr); | |
3893 | ||
3894 | voptgenerror | |
3895 | (FLG_ABSTRACT, | |
3896 | message ("Arrow access field of abstract type (%t): %s->%s", | |
3897 | t, exprNode_unparse (s), f), | |
3898 | loc); | |
3899 | ||
3900 | /* | |
3901 | ** Set the state correctly, as if the abstraction is broken. | |
3902 | */ | |
3903 | ||
3904 | if (ctype_isRealPointer (xrt) && | |
3905 | (b = ctype_realType (ctype_baseArrayPtr (xrt)), | |
3906 | ctype_isStructorUnion (b))) | |
3907 | { | |
3908 | uentry fentry = uentryList_lookupField (ctype_getFields (b), f); | |
3909 | ret->typ = uentry_getType (fentry); | |
3910 | ret->sref = sRef_makeArrow (s->sref, uentry_rawName (fentry)); | |
3911 | } | |
3912 | else | |
3913 | { | |
3914 | ret->typ = ctype_unknown; | |
3915 | ret->sref = sRef_undefined; | |
3916 | } | |
3917 | } | |
3918 | else /* not a struct, union or abstract */ | |
3919 | { | |
3920 | if (ctype_isUnknown (tr)) { | |
3921 | cstring sn = cstring_copy (f); | |
3922 | ||
3923 | DPRINTF (("Here: %s", exprNode_unparse (s))); | |
3924 | ||
3925 | exprNode_checkUse (ret, s->sref, s->loc); | |
3926 | exprNode_checkUse (ret, sRef_makePointer (s->sref), s->loc); | |
3927 | ||
3928 | cstring_markOwned (sn); | |
3929 | ret->sref = sRef_makeArrow (s->sref, sn); | |
3930 | ||
3931 | ret->kind = XPR_ARROW; | |
3932 | return (ret); | |
3933 | } else { | |
3934 | voptgenerror | |
3935 | (FLG_TYPE, | |
3936 | message ("Arrow access field of non-struct or union " | |
3937 | "pointer (%t): %s->%s", | |
3938 | t, exprNode_unparse (s), f), | |
3939 | loc); | |
3940 | ||
3941 | ret->typ = ctype_unknown; | |
3942 | ret->sref = sRef_undefined; | |
3943 | } | |
3944 | } | |
3945 | } | |
3946 | } | |
3947 | else /* its not a pointer */ | |
3948 | { | |
3949 | if (!ctype_isUnknown (tr)) | |
3950 | { | |
3951 | voptgenerror | |
3952 | (FLG_TYPE, | |
3953 | message ("Arrow access of non-pointer (%t): %s->%s", | |
3954 | t, exprNode_unparse (s), f), | |
3955 | loc); | |
3956 | ||
3957 | ret->typ = ctype_unknown; | |
3958 | ret->sref = sRef_undefined; | |
3959 | } | |
3960 | else | |
3961 | { | |
3962 | cstring sn = cstring_copy (f); | |
3963 | ||
3964 | DPRINTF (("Here: %s", exprNode_unparse (s))); | |
3965 | ||
3966 | exprNode_checkUse (ret, s->sref, s->loc); | |
3967 | exprNode_checkUse (ret, sRef_makePointer (s->sref), s->loc); | |
3968 | ||
3969 | cstring_markOwned (sn); | |
3970 | ret->sref = sRef_makeArrow (s->sref, sn); | |
3971 | ||
3972 | ret->kind = XPR_ARROW; | |
3973 | return (ret); | |
3974 | } | |
3975 | } | |
3976 | ||
616915dd | 3977 | return (ret); |
3978 | } | |
3979 | BADEXIT; | |
3980 | } | |
3981 | ||
28bf4b0b | 3982 | exprNode |
3983 | exprNode_arrowAccess (/*@only@*/ exprNode s, | |
3984 | /*@only@*/ lltok arrow, | |
3985 | /*@only@*/ cstring f) | |
3986 | { | |
3987 | exprNode res = exprNode_arrowAccessAux (s, lltok_getLoc (arrow), f); | |
3988 | lltok_release (arrow); | |
3989 | return res; | |
3990 | } | |
3991 | ||
616915dd | 3992 | /* |
3993 | ** only postOp's in C: i++ and i-- | |
3994 | */ | |
3995 | ||
3996 | exprNode | |
3997 | exprNode_postOp (/*@only@*/ exprNode e, /*@only@*/ lltok op) | |
3998 | { | |
3999 | /* check modification also */ | |
4000 | /* cstring opname = lltok_unparse (op);*/ | |
4001 | ctype t; | |
4002 | exprNode ret = exprNode_createPartialCopy (e); | |
4003 | ||
4004 | ret->loc = fileloc_update (ret->loc, lltok_getLoc (op)); | |
4005 | ret->kind = XPR_POSTOP; | |
4006 | ret->edata = exprData_makeUop (e, op); | |
4007 | ||
4008 | if (!exprNode_isDefined (e)) | |
4009 | { | |
4010 | return ret; | |
4011 | } | |
4012 | ||
4013 | checkMacroParen (e); | |
4014 | ||
4015 | exprNode_checkUse (ret, e->sref, e->loc); | |
4016 | exprNode_checkSet (ret, e->sref); | |
4017 | ||
4018 | t = exprNode_getType (e); | |
4019 | ||
4020 | if (sRef_isUnsafe (e->sref)) | |
4021 | { | |
4022 | voptgenerror (FLG_MACROPARAMS, | |
4023 | message ("Operand of %s is macro parameter (non-functional): %s%s", | |
4024 | lltok_unparse (op), exprNode_unparse (e), lltok_unparse (op)), | |
4025 | e->loc); | |
4026 | sRef_makeSafe (e->sref); | |
4027 | sRef_makeSafe (ret->sref); | |
4028 | } | |
4029 | ||
4030 | if (ctype_isForceRealNumeric (&t) || ctype_isRealAP (t)) | |
4031 | { | |
4032 | ret->typ = e->typ; | |
4033 | } | |
4034 | else | |
4035 | { | |
4036 | if (ctype_isRealAbstract (t)) | |
4037 | { | |
4038 | voptgenerror | |
4039 | (FLG_ABSTRACT, | |
4040 | message ("Operand of %s is abstract type (%t): %s", | |
4041 | lltok_unparse (op), t, exprNode_unparse (e)), | |
4042 | e->loc); | |
4043 | } | |
4044 | else | |
4045 | { | |
4046 | voptgenerror | |
4047 | (FLG_TYPE, | |
4048 | message ("Operand of %s is non-numeric (%t): %s", | |
4049 | lltok_unparse (op), t, exprNode_unparse (e)), | |
4050 | e->loc); | |
4051 | } | |
4052 | ret->typ = ctype_unknown; | |
4053 | } | |
4054 | ||
4055 | /* if (ctype_isZero (t)) e->typ = ctype_int; */ | |
4056 | ||
4057 | exprNode_checkModify (e, ret); | |
4058 | ||
4059 | /* added 7/11/2000 D.L */ | |
84c9ffbf | 4060 | /*@i223*/ |
4061 | /*DRL 6/8/01 I decided to disable all LCLint Warning here since the code | |
4062 | probably needs a rewrite any way */ | |
4063 | ||
4064 | /*@ignore@*/ | |
4065 | ||
dc92450f | 4066 | // updateEnvironmentForPostOp (e); |
616915dd | 4067 | |
4068 | /* start modifications */ | |
4069 | /* added by Seejo on 4/16/2000 */ | |
4070 | ||
4071 | /* Arithmetic operations on pointers wil modify the size/len/null terminated | |
4072 | status */ | |
4073 | if ((sRef_isPossiblyNullTerminated (e->sref)) || (sRef_isNullTerminated(e->sref))) { | |
4074 | ||
4075 | ret->sref = sRef_copy (e->sref); | |
4076 | ||
4077 | /* Operator : ++ */ | |
4078 | if (lltok_getTok (op) == INC_OP) { | |
4079 | if (sRef_getSize(e->sref) > 0) { | |
4080 | ||
4081 | sRef_setSize (ret->sref, sRef_getSize(e->sref) - 1); | |
4082 | ||
4083 | if (sRef_getLen(e->sref) == 1) { /* i.e. the first character is \0 */ | |
4084 | /* Assumption: there is only 1 \0 in the buffer */ | |
4085 | /* This will not be correct if there are 2 \0's in the buffer */ | |
4086 | sRef_setNotNullTerminatedState(ret->sref); | |
4087 | sRef_resetLen(ret->sref); | |
4088 | } else { | |
4089 | sRef_setNullTerminatedState(ret->sref); | |
4090 | sRef_setLen (ret->sref, sRef_getLen(e->sref) - 1); | |
4091 | } | |
4092 | if (sRef_isNullTerminated (ret->sref)) | |
4093 | printf ("ret->sref is Null Terminated\n"); | |
4094 | else if (sRef_isPossiblyNullTerminated (ret->sref)) | |
4095 | printf ("ret->sref is Possibly Null Terminated\n"); | |
4096 | else if (sRef_isNotNullTerminated (ret->sref)) | |
4097 | printf ("ret->sref is Not Null Terminated\n"); | |
4098 | } | |
4099 | } | |
4100 | ||
4101 | /* Operator : -- */ | |
4102 | if (lltok_getTok (op) == DEC_OP) { | |
4103 | if (sRef_getSize(e->sref) >= 0) { | |
4104 | sRef_setSize (ret->sref, sRef_getSize(e->sref) + 1); | |
4105 | sRef_setLen (ret->sref, sRef_getLen(e->sref) + 1); | |
4106 | } | |
4107 | } | |
4108 | } | |
84c9ffbf | 4109 | /*@end@*/ |
616915dd | 4110 | /* end modifications */ |
4111 | ||
4112 | return ret; | |
4113 | } | |
4114 | ||
4115 | exprNode | |
4116 | exprNode_preOp (/*@only@*/ exprNode e, /*@only@*/ lltok op) | |
4117 | { | |
4118 | bool checkMod = FALSE; | |
4119 | ctype te, tr; | |
4120 | int opid = lltok_getTok (op); | |
4121 | exprNode ret = exprNode_createSemiCopy (e); | |
4122 | ||
4123 | exprNode_copySets (ret, e); | |
4124 | ||
4125 | multiVal_free (ret->val); | |
4126 | ret->val = multiVal_undefined; | |
4127 | ret->loc = fileloc_update (ret->loc, lltok_getLoc (op)); | |
4128 | ret->kind = XPR_PREOP; | |
4129 | ret->edata = exprData_makeUop (e, op); | |
4130 | ||
4131 | if (exprNode_isError (e)) | |
4132 | { | |
4133 | return ret; | |
4134 | } | |
4135 | ||
4136 | checkMacroParen (e); | |
4137 | ||
4138 | te = exprNode_getType (e); | |
4139 | tr = ctype_realType (te); | |
4140 | ||
4141 | if (opid != TAMPERSAND) | |
4142 | { | |
4143 | exprNode_checkUse (ret, e->sref, e->loc); | |
4144 | ||
4145 | if (ctype_isRealAbstract (tr) | |
4146 | && (!(ctype_isRealBool (te) && (opid == TEXCL)))) | |
4147 | { | |
4148 | if (optgenerror (FLG_ABSTRACT, | |
4149 | message ("Operand of %s is abstract type (%t): %s", | |
4150 | lltok_unparse (op), tr, | |
4151 | exprNode_unparse (ret)), | |
4152 | e->loc)) | |
4153 | { | |
4154 | tr = te = ctype_unknown; | |
4155 | ret->typ = ctype_unknown; | |
4156 | sRef_setNullError (e->sref); | |
4157 | } | |
4158 | } | |
4159 | } | |
4160 | ||
4161 | switch (opid) | |
4162 | { | |
4163 | case INC_OP: | |
4164 | case DEC_OP: /* should also check modification! */ | |
616915dd | 4165 | if (sRef_isMacroParamRef (e->sref)) |
4166 | { | |
4167 | voptgenerror | |
4168 | (FLG_MACROPARAMS, | |
4169 | message ("Operand of %s is macro parameter (non-functional): %s", | |
4170 | lltok_unparse (op), exprNode_unparse (ret)), | |
4171 | e->loc); | |
4172 | } | |
4173 | else | |
4174 | { | |
4175 | exprNode_checkSet (ret, e->sref); | |
4176 | } | |
4177 | ||
4178 | if (ctype_isForceRealNumeric (&tr) || ctype_isRealAP (tr)) | |
4179 | { | |
4180 | } | |
4181 | else | |
4182 | { | |
4183 | if (context_msgStrictOps ()) | |
4184 | { | |
4185 | voptgenerror | |
4186 | (FLG_STRICTOPS, | |
4187 | message ("Operand of %s is non-numeric (%t): %s", | |
4188 | lltok_unparse (op), te, exprNode_unparse (ret)), | |
4189 | e->loc); | |
4190 | } | |
4191 | ret->typ = ctype_int; | |
4192 | } | |
4193 | ||
4194 | /* start modifications */ | |
4195 | /* added by Seejo on 4/16/2000 */ | |
4196 | ||
4197 | /* Arithmetic operations on pointers wil modify the size/len/null terminated | |
4198 | status */ | |
4199 | if ((sRef_isPossiblyNullTerminated (e->sref)) || (sRef_isNullTerminated(e->sref))) { | |
4200 | ||
4201 | ret->sref = sRef_copy (e->sref); | |
4202 | ||
4203 | /* Operator : ++ */ | |
4204 | if (lltok_getTok (op) == INC_OP) { | |
4205 | if (sRef_getSize(e->sref) > 0) { | |
4206 | ||
4207 | sRef_setSize (ret->sref, sRef_getSize(e->sref) - 1); | |
4208 | ||
4209 | if (sRef_getLen(e->sref) == 1) { /* i.e. the first character is \0 */ | |
4210 | /* Assumption: there is only 1 \0 in the buffer */ | |
4211 | /* This will not be correct if there are 2 \0's in the buffer */ | |
4212 | sRef_setNotNullTerminatedState(ret->sref); | |
4213 | sRef_resetLen (ret->sref); | |
4214 | } else { | |
4215 | sRef_setNullTerminatedState(ret->sref); | |
4216 | sRef_setLen (ret->sref, sRef_getLen(e->sref) - 1); | |
4217 | } | |
4218 | } | |
4219 | } | |
4220 | ||
4221 | /* Operator : -- */ | |
4222 | if (lltok_getTok (op) == DEC_OP) { | |
4223 | if (sRef_getSize(e->sref) >= 0) { | |
4224 | sRef_setSize (ret->sref, sRef_getSize(e->sref) + 1); | |
4225 | sRef_setLen (ret->sref, sRef_getLen(e->sref) + 1); | |
4226 | } | |
4227 | } | |
4228 | } | |
4229 | ||
4230 | /* end modifications */ | |
4231 | ||
4232 | checkMod = TRUE; | |
4233 | break; | |
4234 | ||
4235 | case TMINUS: | |
4236 | case TPLUS: | |
4237 | if (ctype_isForceRealNumeric (&tr)) | |
4238 | { | |
4239 | if (opid == TMINUS) | |
4240 | { | |
4241 | ret->val = multiVal_invert (exprNode_getValue (e)); | |
4242 | } | |
4243 | else | |
4244 | { | |
4245 | ret->val = multiVal_copy (exprNode_getValue (e)); | |
4246 | } | |
4247 | } | |
4248 | else | |
4249 | { | |
4250 | if (context_msgStrictOps ()) | |
4251 | { | |
4252 | voptgenerror | |
4253 | (FLG_STRICTOPS, | |
4254 | message ("Operand of %s is non-numeric (%t): %s", | |
4255 | lltok_unparse (op), te, exprNode_unparse (ret)), | |
4256 | e->loc); | |
4257 | } | |
4258 | ||
4259 | ret->typ = ctype_int; | |
4260 | } | |
4261 | break; | |
4262 | ||
4263 | case TEXCL: /* maybe this should be restricted */ | |
4264 | guardSet_flip (ret->guards); | |
4265 | ||
28bf4b0b | 4266 | if (ctype_isRealBool (te) || ctype_isUnknown (te)) |
616915dd | 4267 | { |
4268 | ; | |
4269 | } | |
4270 | else | |
4271 | { | |
4272 | if (ctype_isRealPointer (tr)) | |
4273 | { | |
4274 | if (sRef_isKnown (e->sref)) | |
4275 | { | |
4276 | ret->guards = guardSet_addFalseGuard (ret->guards, e->sref); | |
4277 | } | |
28bf4b0b | 4278 | |
616915dd | 4279 | voptgenerror2n |
4280 | (FLG_BOOLOPS, FLG_PTRNEGATE, | |
4281 | message ("Operand of %s is non-boolean (%t): %s", | |
4282 | lltok_unparse (op), te, exprNode_unparse (ret)), | |
4283 | e->loc); | |
4284 | } | |
4285 | else | |
4286 | { | |
4287 | voptgenerror | |
4288 | (FLG_BOOLOPS, | |
4289 | message ("Operand of %s is non-boolean (%t): %s", | |
4290 | lltok_unparse (op), te, exprNode_unparse (ret)), | |
4291 | e->loc); | |
4292 | } | |
4293 | ||
4294 | ret->typ = ctype_bool; | |
4295 | } | |
4296 | break; | |
4297 | ||
4298 | case TTILDE: | |
4299 | if (ctype_isForceRealInt (&tr)) | |
4300 | { | |
4301 | } | |
4302 | else | |
4303 | { | |
4304 | if (context_msgStrictOps ()) | |
4305 | { | |
4306 | voptgenerror | |
4307 | (FLG_STRICTOPS, | |
4308 | message ("Operand of %s is non-integer (%t): %s", | |
4309 | lltok_unparse (op), te, exprNode_unparse (ret)), | |
4310 | e->loc); | |
4311 | } | |
4312 | ||
4313 | if (ctype_isInt (e->typ)) | |
4314 | { | |
4315 | ret->typ = e->typ; | |
4316 | } | |
4317 | else | |
4318 | { | |
4319 | ret->typ = ctype_int; | |
4320 | } | |
4321 | } | |
4322 | break; | |
4323 | ||
4324 | case TAMPERSAND: | |
4325 | ret->typ = ctype_makePointer (e->typ); | |
4326 | ||
4327 | if (sRef_isKnown (e->sref)) | |
4328 | { | |
4329 | ret->sref = sRef_makeAddress (e->sref); | |
4330 | } | |
4331 | ||
4332 | break; | |
4333 | ||
4334 | case TMULT: | |
4335 | ||
4336 | if (ctype_isAP (tr)) | |
4337 | { | |
4338 | ret->typ = ctype_baseArrayPtr (e->typ); | |
4339 | } | |
4340 | else | |
4341 | { | |
4342 | if (ctype_isKnown (te)) | |
4343 | { | |
4344 | if (ctype_isFunction (te)) | |
4345 | { | |
4346 | ret->typ = e->typ; | |
4347 | ||
4348 | voptgenerror | |
4349 | (FLG_FCNDEREF, | |
4350 | message ("Dereference of function type (%t): %s", | |
4351 | te, exprNode_unparse (ret)), | |
4352 | e->loc); | |
4353 | } | |
4354 | else | |
4355 | { | |
4356 | voptgenerror (FLG_TYPE, | |
4357 | message ("Dereference of non-pointer (%t): %s", | |
4358 | te, exprNode_unparse (ret)), | |
4359 | e->loc); | |
4360 | ret->typ = ctype_unknown; | |
4361 | } | |
4362 | } | |
4363 | else | |
4364 | { | |
4365 | ret->typ = ctype_unknown; | |
4366 | } | |
4367 | ||
4368 | } | |
4369 | ||
4370 | if (sRef_isKnown (e->sref)) | |
4371 | { | |
4372 | if (sRef_possiblyNull (e->sref)) | |
4373 | { | |
4374 | if (!usymtab_isGuarded (e->sref) && !context_inProtectVars ()) | |
4375 | { | |
4376 | if (optgenerror | |
4377 | (FLG_NULLDEREF, | |
4378 | message ("Dereference of %s pointer %q: %s", | |
4379 | sRef_nullMessage (e->sref), | |
4380 | sRef_unparse (e->sref), | |
4381 | exprNode_unparse (ret)), | |
4382 | e->loc)) | |
4383 | { | |
4384 | sRef_showNullInfo (e->sref); | |
4385 | sRef_setNotNull (e->sref, e->loc); /* suppress future messages */ | |
4386 | } | |
4387 | } | |
4388 | } | |
4389 | ||
4390 | ret->sref = sRef_makePointer (e->sref); | |
4391 | } | |
4392 | break; | |
4393 | ||
4394 | default: | |
4395 | llbug (message ("exprNode_preOp: unhandled op: %s", lltok_unparse (op))); | |
4396 | } | |
4397 | ||
4398 | if (checkMod) | |
4399 | { | |
4400 | exprNode_checkModify (e, ret); | |
4401 | } | |
4402 | ||
4403 | return ret; | |
4404 | } | |
4405 | ||
4406 | /* | |
4407 | ** any reason to disallow sizeof (abstract type) ? | |
4408 | */ | |
4409 | ||
4410 | /* | |
4411 | ** used by both sizeof | |
4412 | */ | |
4413 | ||
4414 | static | |
4415 | ctype sizeof_resultType (void) | |
4416 | { | |
4417 | static ctype sizet = ctype_unknown; | |
4418 | ||
4419 | if (ctype_isUnknown (sizet)) | |
4420 | { | |
4421 | if (usymtab_existsType (cstring_makeLiteralTemp ("size_t"))) | |
4422 | { | |
4423 | sizet = uentry_getAbstractType (usymtab_lookup (cstring_makeLiteralTemp ("size_t"))); | |
4424 | } | |
4425 | else | |
4426 | { | |
4427 | sizet = ctype_ulint; | |
4428 | } | |
4429 | } | |
4430 | return sizet; | |
4431 | } | |
4432 | ||
4433 | exprNode | |
4434 | exprNode_sizeofType (/*@only@*/ qtype qt) | |
4435 | { | |
4436 | exprNode ret = exprNode_create (sizeof_resultType ()); | |
4437 | ctype ct = qtype_getType (qt); | |
4438 | ||
4439 | ret->kind = XPR_SIZEOFT; | |
4440 | ret->edata = exprData_makeSizeofType (qt); | |
4441 | ||
4442 | voptgenerror (FLG_SIZEOFTYPE, | |
4443 | message ("Parameter to sizeof is type %s: %s", | |
4444 | ctype_unparse (ct), | |
4445 | exprNode_unparse (ret)), | |
4446 | ret->loc); | |
4447 | ||
4448 | return (ret); | |
4449 | } | |
4450 | ||
4451 | exprNode | |
4452 | exprNode_alignofType (/*@only@*/ qtype qt) | |
4453 | { | |
4454 | exprNode ret = exprNode_create (sizeof_resultType ()); | |
4455 | ctype ct = qtype_getType (qt); | |
4456 | ||
4457 | ret->kind = XPR_ALIGNOFT; | |
4458 | ret->edata = exprData_makeSizeofType (qt); | |
4459 | ||
4460 | voptgenerror (FLG_SIZEOFTYPE, | |
4461 | message ("Parameter to alignof is type %s: %s", | |
4462 | ctype_unparse (ct), | |
4463 | exprNode_unparse (ret)), | |
4464 | ret->loc); | |
4465 | ||
4466 | return (ret); | |
4467 | } | |
4468 | ||
4469 | exprNode exprNode_offsetof (qtype qt, cstringList s) | |
4470 | { | |
4471 | exprNode ret = exprNode_create (sizeof_resultType ()); | |
4472 | ctype ct = qtype_getType (qt); | |
4473 | ||
4474 | ret->kind = XPR_OFFSETOF; | |
4475 | ret->edata = exprData_makeOffsetof (qt, s); | |
4476 | ||
4477 | if (!ctype_isRealSU (ct)) | |
4478 | { | |
4479 | voptgenerror (FLG_TYPE, | |
4480 | message ("First parameter to offsetof is not a " | |
4481 | "struct or union type (type %s): %s", | |
4482 | ctype_unparse (ct), | |
4483 | exprNode_unparse (ret)), | |
4484 | ret->loc); | |
4485 | } | |
4486 | else | |
4487 | { | |
4488 | ctype lt = ct; | |
4489 | ||
4490 | cstringList_elements (s, el) { | |
4491 | uentryList fields; | |
4492 | uentry fld; | |
4493 | ||
4494 | if (ctype_isUndefined (lt)) | |
4495 | { | |
4496 | break; | |
4497 | } | |
4498 | else if (!ctype_isRealSU (lt)) | |
4499 | { | |
4500 | voptgenerror (FLG_TYPE, | |
4501 | message ("Inner offsetof type is not a " | |
4502 | "struct or union type (type %s before field %s): %s", | |
4503 | ctype_unparse (lt), el, | |
4504 | exprNode_unparse (ret)), | |
4505 | ret->loc); | |
4506 | break; | |
4507 | } | |
4508 | else | |
4509 | { | |
4510 | fields = ctype_getFields (ctype_realType (lt)); | |
4511 | fld = uentryList_lookupField (fields, el); | |
4512 | DPRINTF (("Try: %s / %s", ctype_unparse (lt), el)); | |
4513 | ||
4514 | if (uentry_isUndefined (fld)) | |
4515 | { | |
4516 | if (ctype_equal (lt, ct)) { | |
4517 | voptgenerror (FLG_TYPE, | |
4518 | message ("Field %s in offsetof is not the " | |
4519 | "name of a field of %s: %s", | |
4520 | el, | |
4521 | ctype_unparse (ct), | |
4522 | exprNode_unparse (ret)), | |
4523 | ret->loc); | |
4524 | } else { | |
4525 | voptgenerror (FLG_TYPE, | |
4526 | message ("Deep field %s in offsetof is not the " | |
4527 | "name of a field of %s: %s", | |
4528 | el, | |
4529 | ctype_unparse (lt), | |
4530 | exprNode_unparse (ret)), | |
4531 | ret->loc); | |
4532 | } | |
4533 | } | |
4534 | else | |
4535 | { | |
4536 | lt = uentry_getType (fld); | |
4537 | } | |
4538 | } | |
4539 | } end_cstringList_elements; | |
4540 | ||
4541 | /* Should report error if its a bit field - behavior is undefined! */ | |
4542 | } | |
4543 | ||
4544 | return (ret); | |
4545 | } | |
4546 | ||
4547 | /*@only@*/ exprNode | |
4548 | exprNode_sizeofExpr (/*@only@*/ exprNode e) | |
4549 | { | |
4550 | exprNode ret; | |
4551 | ||
4552 | if (exprNode_isUndefined (e)) | |
4553 | { | |
4554 | ret = exprNode_createLoc (ctype_unknown, fileloc_copy (g_currentloc)); | |
4555 | ret->edata = exprData_makeSingle (e); | |
4556 | ret->typ = sizeof_resultType (); | |
4557 | ret->kind = XPR_SIZEOF; | |
4558 | } | |
4559 | else | |
4560 | { | |
4561 | uentry u = exprNode_getUentry (e); | |
4562 | ||
4563 | ret = exprNode_createPartialCopy (e); | |
4564 | ret->edata = exprData_makeSingle (e); | |
4565 | ||
4566 | ret->typ = sizeof_resultType (); | |
4567 | ret->kind = XPR_SIZEOF; | |
4568 | ||
4569 | if (uentry_isValid (u) | |
4570 | && uentry_isRefParam (u) | |
4571 | && ctype_isRealArray (uentry_getType (u))) | |
4572 | { | |
4573 | voptgenerror | |
4574 | (FLG_SIZEOFFORMALARRAY, | |
4575 | message ("Parameter to sizeof is an array-type function parameter: %s", | |
4576 | exprNode_unparse (ret)), | |
4577 | ret->loc); | |
4578 | } | |
4579 | } | |
4580 | ||
4581 | /* | |
4582 | ** sizeof (x) doesn't "really" use x | |
4583 | */ | |
4584 | ||
4585 | return (ret); | |
4586 | } | |
4587 | ||
4588 | /*@only@*/ exprNode | |
4589 | exprNode_alignofExpr (/*@only@*/ exprNode e) | |
4590 | { | |
4591 | exprNode ret; | |
4592 | ||
4593 | if (exprNode_isUndefined (e)) | |
4594 | { | |
4595 | ret = exprNode_createLoc (ctype_unknown, fileloc_copy (g_currentloc)); | |
4596 | } | |
4597 | else | |
4598 | { | |
4599 | ret = exprNode_createPartialCopy (e); | |
4600 | } | |
4601 | ||
4602 | ret->edata = exprData_makeSingle (e); | |
4603 | ret->typ = sizeof_resultType (); | |
4604 | ret->kind = XPR_ALIGNOF; | |
4605 | ||
4606 | /* | |
4607 | ** sizeof (x) doesn't "really" use x | |
4608 | */ | |
4609 | ||
4610 | return (ret); | |
4611 | } | |
4612 | ||
4613 | /*@only@*/ exprNode | |
4614 | exprNode_cast (/*@only@*/ lltok tok, /*@only@*/ exprNode e, /*@only@*/ qtype q) | |
4615 | { | |
4616 | ctype c; | |
4617 | ctype t; | |
4618 | exprNode ret; | |
4619 | ||
4620 | if (exprNode_isError (e)) | |
4621 | { | |
4622 | qtype_free (q); | |
4623 | lltok_release (tok); | |
4624 | return exprNode_undefined; | |
4625 | } | |
4626 | ||
4627 | checkMacroParen (e); | |
4628 | ||
4629 | c = qtype_getType (q); | |
4630 | t = exprNode_getType (e); | |
4631 | ||
4632 | ret = exprNode_createPartialCopy (e); | |
4633 | ||
4634 | ret->loc = fileloc_update (ret->loc, lltok_getLoc (tok)); | |
4635 | ret->typ = c; | |
4636 | ret->kind = XPR_CAST; | |
4637 | ret->edata = exprData_makeCast (tok, e, q); | |
4638 | ||
4639 | if (ctype_isRealSU (ctype_getBaseType (sRef_getType (e->sref)))) | |
4640 | { | |
4641 | /* | |
4642 | ** This is a bit of a hack to avoid a problem | |
4643 | ** when the code does, | |
4644 | ** (some other struct) x | |
4645 | ** ... | |
4646 | ** x->field | |
4647 | */ | |
4648 | ||
4649 | ret->sref = sRef_copy (e->sref); | |
4650 | usymtab_addForceMustAlias (ret->sref, e->sref); | |
4651 | sRef_setTypeFull (ret->sref, c); | |
4652 | DPRINTF (("Cast: %s -> %s", sRef_unparseFull (e->sref), | |
4653 | sRef_unparseFull (ret->sref))); | |
4654 | } | |
4655 | else | |
4656 | { | |
4657 | ret->sref = e->sref; | |
4658 | sRef_setTypeFull (ret->sref, c); | |
4659 | DPRINTF (("Cast 2: -> %s", sRef_unparseFull (ret->sref))); | |
4660 | } | |
4661 | ||
4662 | /* | |
4663 | ** we allow | |
4664 | ** abstract -> void | |
4665 | ** 0 <-> abstract * | |
4666 | ** void * <-> abstract * (if FLG_ABSTVOIDP) | |
4667 | ** abstract * <-> void * (if FLG_ABSTVOIDP) | |
4668 | */ | |
4669 | ||
4670 | if (ctype_isVoid (c)) /* cast to void is always okay --- discard value */ | |
4671 | { | |
4672 | ; | |
4673 | } | |
4674 | else if (ctype_isRealAP (c)) /* casting to array or pointer */ | |
4675 | { | |
4676 | ctype bc = ctype_getBaseType (c); | |
4677 | ctype bt = ctype_getBaseType (t); | |
4678 | ctype rt = ctype_realType (t); | |
4679 | ||
4680 | if (ctype_isFunction (ctype_baseArrayPtr (ctype_realType (c))) | |
4681 | && (ctype_isArrayPtr (rt) | |
4682 | && !ctype_isFunction (ctype_realType (ctype_baseArrayPtr (rt))))) | |
4683 | { | |
4684 | voptgenerror | |
4685 | (FLG_CASTFCNPTR, | |
4686 | message ("Cast from function pointer type (%t) to " | |
4687 | "non-function pointer (%t): %s", | |
4688 | c, t, exprNode_unparse (ret)), | |
4689 | e->loc); | |
4690 | } | |
4691 | ||
4692 | if (!ctype_isFunction (ctype_baseArrayPtr (c)) | |
4693 | && (ctype_isArrayPtr (rt) | |
4694 | && ctype_isFunction (ctype_realType (ctype_baseArrayPtr (rt))))) | |
4695 | { | |
4696 | voptgenerror | |
4697 | (FLG_CASTFCNPTR, | |
4698 | message ("Cast from non-function pointer type (%t) to " | |
4699 | "function pointer (%t): %s", | |
4700 | c, t, exprNode_unparse (ret)), | |
4701 | e->loc); | |
4702 | } | |
4703 | ||
4704 | if (exprNode_isZero (e) && context_getFlag (FLG_ZEROPTR) && | |
4705 | !(ctype_isRealAbstract (bc) | |
4706 | && context_hasAccess (ctype_typeId (bc)))) | |
4707 | { | |
4708 | ; /* okay to cast zero */ | |
4709 | } | |
4710 | else | |
4711 | { | |
4712 | if (ctype_isRealAbstract (bc) | |
4713 | && !context_hasAccess (ctype_typeId (bc))) | |
4714 | { | |
4715 | if (ctype_isVoidPointer (t) || ctype_isUnknown (t)) | |
4716 | { | |
4717 | vnoptgenerror | |
4718 | (FLG_ABSTVOIDP, | |
4719 | message ("Cast to underlying abstract type %t: %s", | |
4720 | c, exprNode_unparse (ret)), | |
4721 | e->loc); | |
4722 | } | |
4723 | else | |
4724 | { | |
4725 | voptgenerror | |
4726 | (FLG_ABSTRACT, | |
4727 | message ("Cast to underlying abstract type %t: %s", | |
4728 | c, exprNode_unparse (ret)), | |
4729 | e->loc); | |
4730 | } | |
4731 | } | |
4732 | ||
4733 | if (ctype_isRealAbstract (bt) | |
4734 | && !context_hasAccess (ctype_typeId (bt))) | |
4735 | { | |
4736 | if (ctype_isUnknown (c) || ctype_isVoidPointer (c)) | |
4737 | { | |
4738 | vnoptgenerror | |
4739 | (FLG_ABSTVOIDP, | |
4740 | message ("Cast from underlying abstract type %t: %s", | |
4741 | t, exprNode_unparse (ret)), | |
4742 | e->loc); | |
4743 | } | |
4744 | else | |
4745 | { | |
4746 | voptgenerror | |
4747 | (FLG_ABSTRACT, | |
4748 | message ("Cast from underlying abstract type %t: %s", | |
4749 | t, exprNode_unparse (ret)), | |
4750 | e->loc); | |
4751 | } | |
4752 | } | |
4753 | } | |
4754 | } | |
4755 | else | |
4756 | { | |
4757 | ctype bt = ctype_realType (ctype_getBaseType (t)); | |
4758 | ctype bc = ctype_realType (ctype_getBaseType (c)); | |
4759 | ||
4760 | if (ctype_isAbstract (bt) && !context_hasAccess (ctype_typeId (bt))) | |
4761 | { | |
4762 | if (ctype_match (c, t)) | |
4763 | { | |
4764 | if (ctype_equal (c, t)) | |
4765 | { | |
4766 | voptgenerror | |
4767 | (FLG_TYPE, | |
4768 | message ("Redundant cast involving abstract type %t: %s", | |
4769 | bt, exprNode_unparse (ret)), | |
4770 | e->loc); | |
4771 | } | |
4772 | } | |
4773 | else | |
4774 | { | |
4775 | voptgenerror | |
4776 | (FLG_ABSTRACT, | |
4777 | message ("Cast from abstract type %t: %s", | |
4778 | bt, exprNode_unparse (ret)), | |
4779 | e->loc); | |
4780 | } | |
4781 | } | |
4782 | ||
4783 | if (ctype_isAbstract (bc) | |
4784 | && !context_hasAccess (ctype_typeId (bc))) | |
4785 | { | |
4786 | if (ctype_match (c, t)) | |
4787 | { | |
4788 | ; | |
4789 | } | |
4790 | else | |
4791 | { | |
28bf4b0b | 4792 | DPRINTF (("No access to: %s / %d", |
4793 | ctype_unparse (bc), ctype_typeId (bc))); | |
4794 | DPRINTF (("Context %s %s", | |
4795 | bool_unparse (context_inFunctionLike ()), | |
4796 | context_unparse ())); | |
616915dd | 4797 | voptgenerror |
4798 | (FLG_ABSTRACT, | |
4799 | message ("Cast to abstract type %t: %s", bc, | |
4800 | exprNode_unparse (ret)), | |
4801 | e->loc); | |
4802 | } | |
4803 | } | |
4804 | } | |
4805 | ||
4806 | if (ctype_isAbstract (c)) | |
4807 | { | |
4808 | if (sRef_isExposed (e->sref) || sRef_isOnly (e->sref)) | |
4809 | { | |
4810 | /* okay, cast exposed to abstract */ | |
4811 | sRef_clearExKindComplete (ret->sref, fileloc_undefined); | |
4812 | } | |
4813 | else | |
4814 | { | |
4815 | if (ctype_isVisiblySharable (t) | |
4816 | && sRef_isExternallyVisible (e->sref) | |
4817 | && !(ctype_isAbstract (t) | |
4818 | && context_hasAccess (ctype_typeId (t)))) | |
4819 | { | |
4820 | voptgenerror | |
4821 | (FLG_CASTEXPOSE, | |
4822 | message ("Cast to abstract type from externally visible " | |
4823 | "mutable storage exposes rep of %s: %s", | |
4824 | ctype_unparse (c), | |
4825 | exprNode_unparse (e)), | |
4826 | e->loc); | |
4827 | } | |
4828 | } | |
4829 | } | |
4830 | ||
4831 | return (ret); | |
4832 | } | |
4833 | ||
4834 | static bool | |
4835 | evaluationOrderUndefined (lltok op) | |
4836 | { | |
4837 | int opid = lltok_getTok (op); | |
4838 | ||
4839 | return (opid != AND_OP && opid != OR_OP); | |
4840 | } | |
4841 | ||
4842 | static bool checkIntegral (/*@notnull@*/ exprNode e1, | |
4843 | /*@notnull@*/ exprNode e2, | |
4844 | /*@notnull@*/ exprNode ret, | |
4845 | lltok op) | |
4846 | { | |
4847 | bool error = FALSE; | |
4848 | ||
4849 | ctype te1 = exprNode_getType (e1); | |
4850 | ctype te2 = exprNode_getType (e2); | |
4851 | ||
4852 | ctype tr1 = ctype_realishType (te1); | |
4853 | ctype tr2 = ctype_realishType (te2); | |
4854 | ||
4855 | if (ctype_isForceRealInt (&tr1) && ctype_isForceRealInt (&tr2)) | |
4856 | { | |
4857 | ; | |
4858 | } | |
4859 | else | |
4860 | { | |
4861 | if (context_msgStrictOps ()) | |
4862 | { | |
4863 | if (!ctype_isInt (tr1) && !ctype_isInt (tr2)) | |
4864 | { | |
4865 | if (ctype_sameName (te1, te2)) | |
4866 | { | |
4867 | error = optgenerror | |
4868 | (FLG_STRICTOPS, | |
4869 | message ("Operands of %s are non-integer (%t): %s", | |
4870 | lltok_unparse (op), te1, | |
4871 | exprNode_unparse (ret)), | |
4872 | e1->loc); | |
4873 | } | |
4874 | else | |
4875 | { | |
4876 | error = optgenerror | |
4877 | (FLG_STRICTOPS, | |
4878 | message ("Operands of %s are non-integers (%t, %t): %s", | |
4879 | lltok_unparse (op), te1, te2, | |
4880 | exprNode_unparse (ret)), | |
4881 | e1->loc); | |
4882 | } | |
4883 | } | |
4884 | else if (!ctype_isInt (tr1)) | |
4885 | { | |
4886 | error = optgenerror | |
4887 | (FLG_STRICTOPS, | |
4888 | message ("Left operand of %s is non-integer (%t): %s", | |
4889 | lltok_unparse (op), te1, exprNode_unparse (ret)), | |
4890 | e1->loc); | |
4891 | } | |
4892 | else | |
4893 | /* !ctype_isInt (te2) */ | |
4894 | { | |
4895 | error = optgenerror | |
4896 | (FLG_STRICTOPS, | |
4897 | message ("Right operand of %s is non-integer (%t): %s", | |
4898 | lltok_unparse (op), te2, exprNode_unparse (ret)), | |
4899 | e2->loc); | |
4900 | } | |
4901 | } | |
4902 | } | |
4903 | ||
4904 | return !error; | |
4905 | } | |
4906 | ||
4907 | /* | |
4908 | ** returns exprNode representing e1 op e2 | |
4909 | ** | |
4910 | ** uses msg if there are errors | |
4911 | ** can be used for both assignment ops and regular ops | |
4912 | ** | |
4913 | ** modifies e1 | |
4914 | */ | |
4915 | ||
4916 | static /*@only@*/ /*@notnull@*/ exprNode | |
4917 | exprNode_makeOp (/*@keep@*/ exprNode e1, /*@keep@*/ exprNode e2, | |
4918 | /*@keep@*/ lltok op) | |
4919 | { | |
4920 | ctype te1, te2, tr1, tr2, tret; | |
4921 | int opid = lltok_getTok (op); | |
4922 | bool hasError = FALSE; | |
4923 | exprNode ret; | |
4924 | ||
4925 | if (exprNode_isError (e1)) | |
4926 | { | |
4927 | ret = exprNode_createPartialNVCopy (e2); | |
4928 | } | |
4929 | else | |
4930 | { | |
4931 | ret = exprNode_createPartialNVCopy (e1); | |
4932 | } | |
4933 | ||
4934 | ret->val = multiVal_undefined; | |
4935 | ret->kind = XPR_OP; | |
4936 | ret->edata = exprData_makeOp (e1, e2, op); | |
4937 | ||
4938 | if (exprNode_isError (e1) || exprNode_isError (e2)) | |
4939 | { | |
4940 | if (opid == TLT || opid == TGT || opid == LE_OP || opid == GE_OP | |
4941 | || opid == EQ_OP || opid == NE_OP | |
4942 | || opid == AND_OP || opid == OR_OP) | |
4943 | { | |
4944 | ret->typ = ctype_bool; | |
4945 | } | |
4946 | ||
4947 | if (exprNode_isDefined (e1)) | |
4948 | { | |
4949 | exprNode_checkUse (ret, e1->sref, e1->loc); | |
4950 | } | |
4951 | ||
4952 | if (exprNode_isDefined (e2)) | |
4953 | { | |
4954 | exprNode_mergeUSs (ret, e2); | |
4955 | exprNode_checkUse (ret, e2->sref, e2->loc); | |
4956 | } | |
4957 | ||
4958 | return ret; | |
4959 | } | |
4960 | ||
4961 | tret = ctype_unknown; | |
4962 | te1 = exprNode_getType (e1); | |
4963 | DPRINTF (("te1 = %s / %s", exprNode_unparse (e1), ctype_unparse (te1))); | |
4964 | ||
4965 | te2 = exprNode_getType (e2); | |
4966 | ||
4967 | tr1 = ctype_realishType (te1); | |
4968 | tr2 = ctype_realishType (te2); | |
4969 | ||
4970 | if (opid == OR_OP) | |
4971 | { | |
4972 | ret->guards = guardSet_or (ret->guards, e2->guards); | |
4973 | } | |
4974 | else if (opid == AND_OP) | |
4975 | { | |
4976 | ret->guards = guardSet_and (ret->guards, e2->guards); | |
4977 | } | |
4978 | else | |
4979 | { | |
4980 | /* no guards */ | |
4981 | } | |
4982 | ||
4983 | if (opid == EQ_OP || opid == NE_OP) | |
4984 | { | |
4985 | exprNode temp1 = e1, temp2 = e2; | |
4986 | ||
4987 | /* could do NULL == x */ | |
4988 | ||
4989 | if (exprNode_isNullValue (e1) || exprNode_isUnknownConstant (e1)) | |
4990 | { | |
4991 | temp1 = e2; temp2 = e1; | |
4992 | } | |
4993 | ||
4994 | if (exprNode_isNullValue (temp2) || exprNode_isUnknownConstant (temp2)) | |
4995 | { | |
4996 | reflectNullTest (temp1, (opid == NE_OP)); | |
4997 | guardSet_free (ret->guards); | |
4998 | ret->guards = guardSet_copy (temp1->guards); | |
4999 | } | |
5000 | } | |
5001 | ||
5002 | if (opid == TLT || opid == TGT || opid == LE_OP || opid == GE_OP | |
5003 | || opid == EQ_OP || opid == NE_OP || opid == AND_OP || opid == OR_OP) | |
5004 | { | |
5005 | tret = ctype_bool; | |
5006 | } | |
5007 | ||
5008 | if (anyAbstract (tr1, tr2) && | |
5009 | (!((ctype_isRealBool (te1) || ctype_isRealBool (te2)) && | |
5010 | (opid == AND_OP || opid == OR_OP | |
5011 | || opid == EQ_OP || opid == NE_OP)))) | |
5012 | { | |
5013 | abstractOpError (tr1, tr2, op, e1, e2, e1->loc, e2->loc); | |
5014 | } | |
5015 | else if (ctype_isUnknown (te1) || ctype_isUnknown (te2)) | |
5016 | { | |
5017 | /* unknown types, no comparisons possible */ | |
5018 | } | |
5019 | else | |
5020 | { | |
5021 | switch (opid) | |
5022 | { | |
5023 | case TMULT: /* multiplication and division: */ | |
5024 | case TDIV: /* */ | |
5025 | case MUL_ASSIGN: /* numeric, numeric -> numeric */ | |
5026 | case DIV_ASSIGN: /* */ | |
5027 | ||
5028 | tret = checkNumerics (tr1, tr2, te1, te2, e1, e2, op); | |
5029 | break; | |
5030 | ||
5031 | case TPLUS: /* addition and subtraction: */ | |
5032 | case TMINUS: /* pointer, int -> pointer */ | |
5033 | case SUB_ASSIGN: /* int, pointer -> pointer */ | |
5034 | case ADD_ASSIGN: /* numeric, numeric -> numeric */ | |
5035 | ||
5036 | tr1 = ctype_fixArrayPtr (tr1); | |
5037 | ||
5038 | if ((ctype_isRealPointer (tr1) && !exprNode_isNullValue (e1)) | |
5039 | && (!ctype_isRealPointer (tr2) && ctype_isRealInt (tr2))) | |
5040 | { | |
5041 | /* pointer + int */ | |
5042 | ||
5043 | if (context_msgPointerArith ()) | |
5044 | { | |
5045 | voptgenerror | |
5046 | (FLG_POINTERARITH, | |
5047 | message ("Pointer arithmetic (%t, %t): %s", | |
5048 | te1, te2, exprNode_unparse (ret)), | |
5049 | e1->loc); | |
5050 | } | |
5051 | ||
5052 | if (sRef_possiblyNull (e1->sref) | |
5053 | && !usymtab_isGuarded (e1->sref)) | |
5054 | { | |
5055 | voptgenerror | |
5056 | (FLG_NULLPOINTERARITH, | |
5057 | message ("Pointer arithmetic involving possibly " | |
5058 | "null pointer %s: %s", | |
5059 | exprNode_unparse (e1), | |
5060 | exprNode_unparse (ret)), | |
5061 | e1->loc); | |
5062 | } | |
5063 | ||
5064 | ret->sref = sRef_copy (e1->sref); | |
5065 | ||
5066 | /* start modifications */ | |
5067 | /* added by Seejo on 4/16/2000 */ | |
5068 | ||
5069 | /* Arithmetic operations on pointers wil modify the size/len/null terminated | |
5070 | status */ | |
5071 | if ((sRef_isPossiblyNullTerminated (e1->sref)) || (sRef_isNullTerminated(e1->sref))) { | |
5072 | //if (sRef_isKnown (e->sref)) { | |
5073 | //ret->sref = sRef_makeAddress (e->sref); | |
5074 | //} | |
5075 | ||
5076 | int val; | |
5077 | /*drl 1-4-2001 | |
5078 | added ugly fixed to stop | |
5079 | program from crashing on point + int +int | |
5080 | one day I'll fix this or ask Seejo wtf the codes supposed to do. */ | |
5081 | ||
5082 | if (!multiVal_isInt (e2->val) ) | |
5083 | break; | |
5084 | /*end drl*/ | |
5085 | ||
5086 | val = (int) multiVal_forceInt (e2->val); | |
5087 | ||
5088 | /* Operator : + or += */ | |
5089 | if ((lltok_getTok (op) == TPLUS) || (lltok_getTok(op) == ADD_ASSIGN)) { | |
5090 | if (sRef_getSize(e1->sref) >= val) {/* Incrementing the pointer by | |
5091 | val should not result in a | |
5092 | size < 0 (size = 0 is ok !) */ | |
5093 | ||
5094 | sRef_setSize (ret->sref, sRef_getSize(e1->sref) - val); | |
5095 | ||
5096 | if (sRef_getLen(e1->sref) == val) { /* i.e. the character at posn val is \0 */ | |
5097 | sRef_setNotNullTerminatedState(ret->sref); | |
5098 | sRef_resetLen (ret->sref); | |
5099 | } else { | |
5100 | sRef_setNullTerminatedState(ret->sref); | |
5101 | sRef_setLen (ret->sref, sRef_getLen(e1->sref) - val); | |
5102 | } | |
5103 | } | |
5104 | } | |
5105 | ||
5106 | /* Operator : - or -= */ | |
5107 | if ((lltok_getTok (op) == TMINUS) || (lltok_getTok (op) == SUB_ASSIGN)) { | |
5108 | if (sRef_getSize(e1->sref) >= 0) { | |
5109 | sRef_setSize (ret->sref, sRef_getSize(e1->sref) + val); | |
5110 | sRef_setLen (ret->sref, sRef_getLen(e1->sref) + val); | |
5111 | } | |
5112 | } | |
5113 | } | |
5114 | ||
5115 | /* end modifications */ | |
5116 | ||
5117 | sRef_setNullError (ret->sref); | |
5118 | ||
5119 | /* | |
5120 | ** Fixed for 2.2c: the alias state of ptr + int is dependent, | |
5121 | ** since is points to storage that should not be deallocated | |
5122 | ** through this pointer. | |
5123 | */ | |
5124 | ||
5125 | if (sRef_isOnly (ret->sref) | |
5126 | || sRef_isFresh (ret->sref)) | |
5127 | { | |
5128 | sRef_setAliasKind (ret->sref, AK_DEPENDENT, exprNode_loc (ret)); | |
5129 | } | |
5130 | ||
5131 | tret = e1->typ; | |
5132 | } | |
5133 | else if ((!ctype_isRealPointer(tr1) && ctype_isRealInt (tr1)) | |
5134 | && (ctype_isRealPointer (tr2) && !exprNode_isNullValue (e2))) | |
5135 | { | |
5136 | if (context_msgPointerArith ()) | |
5137 | { | |
5138 | voptgenerror | |
5139 | (FLG_POINTERARITH, | |
5140 | message ("Pointer arithmetic (%t, %t): %s", | |
5141 | te1, te2, exprNode_unparse (ret)), | |
5142 | e1->loc); | |
5143 | } | |
5144 | ||
5145 | if (sRef_possiblyNull (e1->sref) | |
5146 | && !usymtab_isGuarded (e1->sref)) | |
5147 | { | |
5148 | voptgenerror | |
5149 | (FLG_NULLPOINTERARITH, | |
5150 | message ("Pointer arithmetic involving possibly " | |
5151 | "null pointer %s: %s", | |
5152 | exprNode_unparse (e2), | |
5153 | exprNode_unparse (ret)), | |
5154 | e2->loc); | |
5155 | } | |
5156 | ||
5157 | ret->sref = sRef_copy (e2->sref); | |
5158 | ||
5159 | /* start modifications */ | |
5160 | /* added by Seejo on 4/16/2000 */ | |
5161 | ||
5162 | /* Arithmetic operations on pointers wil modify the size/len/null terminated | |
5163 | status */ | |
5164 | ||
5165 | if ((sRef_isPossiblyNullTerminated (e2->sref)) || (sRef_isNullTerminated(e2->sref))) { | |
5166 | //if (sRef_isKnown (e->sref)) { | |
5167 | //ret->sref = sRef_makeAddress (e->sref); | |
5168 | //} | |
5169 | ||
5170 | int val = (int) multiVal_forceInt (e1->val); | |
5171 | ||
5172 | /* Operator : + or += */ | |
5173 | if ((lltok_getTok (op) == TPLUS) || (lltok_getTok(op) == ADD_ASSIGN)) { | |
5174 | if (sRef_getSize(e2->sref) >= val) {/* Incrementing the pointer by | |
5175 | val should not result in a | |
5176 | size < 0 (size = 0 is ok !) */ | |
5177 | ||
5178 | sRef_setSize (ret->sref, sRef_getSize(e2->sref) - val); | |
5179 | ||
5180 | if (sRef_getLen(e2->sref) == val) { /* i.e. the character at posn val is \0 */ | |
5181 | sRef_setNotNullTerminatedState(ret->sref); | |
5182 | sRef_resetLen (ret->sref); | |
5183 | } else { | |
5184 | sRef_setNullTerminatedState(ret->sref); | |
5185 | sRef_setLen (ret->sref, sRef_getLen(e2->sref) - val); | |
5186 | } | |
5187 | } | |
5188 | } | |
5189 | ||
5190 | /* Operator : - or -= */ | |
5191 | if ((lltok_getTok (op) == TMINUS) || (lltok_getTok (op) == SUB_ASSIGN)) { | |
5192 | if (sRef_getSize(e2->sref) >= 0) { | |
5193 | sRef_setSize (ret->sref, sRef_getSize(e2->sref) + val); | |
5194 | sRef_setLen (ret->sref, sRef_getLen(e2->sref) + val); | |
5195 | } | |
5196 | } | |
5197 | } | |
5198 | ||
5199 | /* end modifications */ | |
5200 | ||
5201 | sRef_setNullError (ret->sref); | |
5202 | ||
5203 | /* | |
5204 | ** Fixed for 2.2c: the alias state of ptr + int is dependent, | |
5205 | ** since is points to storage that should not be deallocated | |
5206 | ** through this pointer. | |
5207 | */ | |
5208 | ||
5209 | if (sRef_isOnly (ret->sref) | |
5210 | || sRef_isFresh (ret->sref)) { | |
5211 | sRef_setAliasKind (ret->sref, AK_DEPENDENT, exprNode_loc (ret)); | |
5212 | } | |
5213 | ||
5214 | tret = e2->typ; | |
5215 | ret->sref = e2->sref; | |
5216 | } | |
5217 | else | |
5218 | { | |
5219 | tret = checkNumerics (tr1, tr2, te1, te2, e1, e2, op); | |
5220 | } | |
5221 | ||
5222 | break; | |
5223 | ||
5224 | case LEFT_ASSIGN: /* Shifts: should be unsigned values */ | |
5225 | case RIGHT_ASSIGN: | |
5226 | case LEFT_OP: | |
5227 | case RIGHT_OP: | |
5228 | case TAMPERSAND: /* bitwise & */ | |
5229 | case AND_ASSIGN: | |
5230 | case TCIRC: /* ^ (XOR) */ | |
5231 | case TBAR: | |
5232 | case XOR_ASSIGN: | |
5233 | case OR_ASSIGN: | |
5234 | { | |
5235 | bool reported = FALSE; | |
5236 | flagcode code = FLG_BITWISEOPS; | |
5237 | ||
5238 | if (opid == LEFT_OP || opid == LEFT_ASSIGN | |
5239 | || opid == RIGHT_OP || opid == RIGHT_ASSIGN) { | |
5240 | code = FLG_SHIFTSIGNED; | |
5241 | } | |
5242 | ||
5243 | if (!ctype_isUnsigned (tr1)) | |
5244 | { | |
5245 | if (exprNode_isNonNegative (e1)) { | |
5246 | ; | |
5247 | } else { | |
5248 | reported = optgenerror | |
5249 | (code, | |
5250 | message ("Left operand of %s is not unsigned value (%t): %s", | |
5251 | lltok_unparse (op), te1, | |
5252 | exprNode_unparse (ret)), | |
5253 | e1->loc); | |
5254 | ||
5255 | if (reported) { | |
5256 | te1 = ctype_uint; | |
5257 | } | |
5258 | } | |
5259 | } | |
5260 | else | |
5261 | { | |
5262 | /* right need not be signed for shifts */ | |
5263 | if (code != FLG_SHIFTSIGNED | |
5264 | && !ctype_isUnsigned (tr2)) | |
5265 | { | |
5266 | if (!exprNode_isNonNegative (e2)) { | |
5267 | reported = optgenerror | |
5268 | (code, | |
5269 | message ("Right operand of %s is not unsigned value (%t): %s", | |
5270 | lltok_unparse (op), te2, | |
5271 | exprNode_unparse (ret)), | |
5272 | e2->loc); | |
5273 | } | |
5274 | } | |
5275 | } | |
5276 | ||
5277 | if (!reported) | |
5278 | { | |
5279 | if (!checkIntegral (e1, e2, ret, op)) { | |
5280 | te1 = ctype_unknown; | |
5281 | } | |
5282 | } | |
5283 | ||
5284 | DPRINTF (("Set: %s", ctype_unparse (te1))); | |
5285 | ||
5286 | /* | |
5287 | ** tret is the widest type of te1 and te2 | |
5288 | */ | |
5289 | ||
5290 | tret = ctype_widest (te1, te2); | |
5291 | break; | |
5292 | } | |
5293 | case MOD_ASSIGN: | |
5294 | case TPERCENT: | |
5295 | if (checkIntegral (e1, e2, ret, op)) { | |
5296 | tret = te1; | |
5297 | } else { | |
5298 | tret = ctype_unknown; | |
5299 | } | |
5300 | break; | |
5301 | case EQ_OP: | |
5302 | case NE_OP: | |
5303 | case TLT: /* comparisons */ | |
5304 | case TGT: /* numeric, numeric -> bool */ | |
5305 | if ((ctype_isReal (tr1) && !ctype_isInt (tr1)) | |
5306 | || (ctype_isReal (tr2) && !ctype_isInt (tr2))) | |
5307 | { | |
5308 | ctype rtype = tr1; | |
5309 | bool fepsilon = FALSE; | |
5310 | ||
5311 | if (!ctype_isReal (rtype) || ctype_isInt (rtype)) | |
5312 | { | |
5313 | rtype = tr2; | |
5314 | } | |
5315 | ||
5316 | if (opid == TLT || opid == TGT) | |
5317 | { | |
5318 | uentry ue1 = exprNode_getUentry (e1); | |
5319 | uentry ue2 = exprNode_getUentry (e2); | |
5320 | ||
5321 | /* | |
5322 | ** FLT_EPSILON, etc. really is a variable, not | |
5323 | ** a constant. | |
5324 | */ | |
5325 | ||
5326 | if (uentry_isVariable (ue1)) | |
5327 | { | |
5328 | cstring uname = uentry_rawName (ue1); | |
5329 | ||
5330 | if (cstring_equalLit (uname, "FLT_EPSILON") | |
5331 | || cstring_equalLit (uname, "DBL_EPSILON") | |
5332 | || cstring_equalLit (uname, "LDBL_EPSILON")) | |
5333 | { | |
5334 | fepsilon = TRUE; | |
5335 | } | |
5336 | } | |
5337 | ||
5338 | if (uentry_isVariable (ue2)) | |
5339 | { | |
5340 | cstring uname = uentry_rawName (ue2); | |
5341 | ||
5342 | if (cstring_equalLit (uname, "FLT_EPSILON") | |
5343 | || cstring_equalLit (uname, "DBL_EPSILON") | |
5344 | || cstring_equalLit (uname, "LDBL_EPSILON")) | |
5345 | { | |
5346 | fepsilon = TRUE; | |
5347 | } | |
5348 | } | |
5349 | } | |
5350 | ||
5351 | if (fepsilon) | |
5352 | { | |
5353 | ; /* Don't complain. */ | |
5354 | } | |
5355 | else | |
5356 | { | |
5357 | voptgenerror | |
5358 | (FLG_REALCOMPARE, | |
5359 | message ("Dangerous comparison involving %s types: %s", | |
5360 | ctype_unparse (rtype), | |
5361 | exprNode_unparse (ret)), | |
5362 | ret->loc); | |
5363 | } | |
5364 | } | |
5365 | /*@fallthrough@*/ | |
5366 | case LE_OP: | |
5367 | case GE_OP: | |
5368 | ||
5369 | /* | |
5370 | ** Types should match. | |
5371 | */ | |
5372 | ||
5373 | if (!exprNode_matchTypes (e1, e2)) | |
5374 | { | |
5375 | hasError = gentypeerror | |
5376 | (te1, e1, te2, e2, | |
5377 | message ("Operands of %s have incompatible types (%t, %t): %s", | |
5378 | lltok_unparse (op), te1, te2, exprNode_unparse (ret)), | |
5379 | e1->loc); | |
5380 | ||
5381 | } | |
5382 | ||
5383 | if (hasError | |
5384 | || (ctype_isForceRealNumeric (&tr1) | |
5385 | && ctype_isForceRealNumeric (&tr2)) || | |
5386 | (ctype_isRealPointer (tr1) && ctype_isRealPointer (tr2))) | |
5387 | { | |
5388 | ; /* okay */ | |
5389 | } | |
5390 | else | |
5391 | { | |
5392 | if ((ctype_isRealNumeric (tr1) && ctype_isRealPointer (tr2)) || | |
5393 | (ctype_isRealPointer (tr1) && ctype_isRealNumeric (tr2))) | |
5394 | { | |
5395 | voptgenerror | |
5396 | (FLG_PTRNUMCOMPARE, | |
5397 | message ("Comparison of pointer and numeric (%t, %t): %s", | |
5398 | te1, te2, exprNode_unparse (ret)), | |
5399 | e1->loc); | |
5400 | } | |
5401 | else | |
5402 | { | |
5403 | (void) checkNumerics (tr1, tr2, te1, te2, e1, e2, op); | |
5404 | } | |
5405 | tret = ctype_bool; | |
5406 | } | |
5407 | ||
5408 | /* EQ_OP should NOT be used with booleans (unless one is FALSE) */ | |
5409 | ||
5410 | if ((opid == EQ_OP || opid == NE_OP) && | |
5411 | ctype_isDirectBool (tr1) && ctype_isDirectBool (tr2)) | |
5412 | { | |
5413 | /* | |
5414 | ** is one a variable? | |
5415 | */ | |
5416 | ||
5417 | if (uentry_isVariable (exprNode_getUentry (e1)) | |
5418 | || uentry_isVariable (exprNode_getUentry (e2))) | |
5419 | { | |
5420 | /* | |
5421 | ** comparisons with FALSE are okay | |
5422 | */ | |
5423 | ||
5424 | if (exprNode_isFalseConstant (e1) | |
5425 | || exprNode_isFalseConstant (e2)) | |
5426 | { | |
5427 | ; | |
5428 | } | |
5429 | else | |
5430 | { | |
5431 | voptgenerror | |
5432 | (FLG_BOOLCOMPARE, | |
5433 | message | |
5434 | ("Use of %q with %s variables (risks inconsistency because " | |
5435 | "of multiple true values): %s", | |
5436 | cstring_makeLiteral ((opid == EQ_OP) ? "==" : "!="), | |
5437 | context_printBoolName (), exprNode_unparse (ret)), | |
5438 | e1->loc); | |
5439 | } | |
5440 | } | |
5441 | } | |
5442 | break; | |
5443 | ||
5444 | case AND_OP: /* bool, bool -> bool */ | |
5445 | case OR_OP: | |
5446 | ||
5447 | if (ctype_isForceRealBool (&tr1) && ctype_isForceRealBool (&tr2)) | |
5448 | { | |
5449 | ; | |
5450 | } | |
5451 | else | |
5452 | { | |
5453 | if (context_maybeSet (FLG_BOOLOPS)) | |
5454 | { | |
5455 | if (!ctype_isRealBool (te1) && !ctype_isRealBool (te2)) | |
5456 | { | |
5457 | if (ctype_sameName (te1, te2)) | |
5458 | { | |
5459 | voptgenerror | |
5460 | (FLG_BOOLOPS, | |
5461 | message ("Operands of %s are non-boolean (%t): %s", | |
5462 | lltok_unparse (op), te1, | |
5463 | exprNode_unparse (ret)), | |
5464 | e1->loc); | |
5465 | } | |
5466 | else | |
5467 | { | |
5468 | voptgenerror | |
5469 | (FLG_BOOLOPS, | |
5470 | message | |
5471 | ("Operands of %s are non-booleans (%t, %t): %s", | |
5472 | lltok_unparse (op), te1, te2, exprNode_unparse (ret)), | |
5473 | e1->loc); | |
5474 | } | |
5475 | } | |
5476 | else if (!ctype_isRealBool (te1)) | |
5477 | { | |
5478 | voptgenerror | |
5479 | (FLG_BOOLOPS, | |
5480 | message ("Left operand of %s is non-boolean (%t): %s", | |
5481 | lltok_unparse (op), te1, exprNode_unparse (ret)), | |
5482 | e1->loc); | |
5483 | } | |
5484 | else if (!ctype_isRealBool (te2)) | |
5485 | { | |
5486 | voptgenerror | |
5487 | (FLG_BOOLOPS, | |
5488 | message ("Right operand of %s is non-boolean (%t): %s", | |
5489 | lltok_unparse (op), te2, exprNode_unparse (ret)), | |
5490 | e2->loc); | |
5491 | } | |
5492 | else | |
5493 | { | |
5494 | ; | |
5495 | } | |
5496 | } | |
5497 | tret = ctype_bool; | |
5498 | } | |
5499 | break; | |
5500 | default: { | |
5501 | llfatalbug | |
5502 | (cstring_makeLiteral | |
28bf4b0b | 5503 | ("There has been a problem in the parser. This is believed to result " |
5504 | "from a problem with bison v. 1.25. Please try rebuidling LCLint " | |
5505 | "using the pre-compiled grammar files by commenting out the " | |
5506 | "BISON= line in the top-level Makefile.")); | |
616915dd | 5507 | } |
5508 | } | |
5509 | } | |
5510 | ||
5511 | DPRINTF (("Return type: %s", ctype_unparse (tret))); | |
5512 | ret->typ = tret; | |
5513 | ||
5514 | exprNode_checkUse (ret, e1->sref, e1->loc); | |
5515 | exprNode_mergeUSs (ret, e2); | |
5516 | exprNode_checkUse (ret, e2->sref, e2->loc); | |
5517 | ||
5518 | return ret; | |
5519 | } | |
5520 | ||
5521 | /*@only@*/ exprNode | |
5522 | exprNode_op (/*@only@*/ exprNode e1, /*@keep@*/ exprNode e2, | |
5523 | /*@only@*/ lltok op) | |
5524 | { | |
5525 | exprNode ret; | |
5526 | ||
5527 | checkMacroParen (e1); | |
5528 | checkMacroParen (e2); | |
5529 | ||
5530 | if (evaluationOrderUndefined (op) && context_maybeSet (FLG_EVALORDER)) | |
5531 | { | |
5532 | checkExpressionDefined (e1, e2, op); | |
5533 | } | |
5534 | ||
5535 | ret = exprNode_makeOp (e1, e2, op); | |
5536 | return (ret); | |
5537 | } | |
5538 | ||
5539 | static | |
5540 | void exprNode_checkAssignMod (exprNode e1, exprNode ret) | |
5541 | { | |
5542 | /* | |
5543 | ** This is somewhat bogus! | |
5544 | ** | |
5545 | ** Assigning to a nested observer in a non-observer datatype | |
5546 | ** should not produce an error. | |
5547 | */ | |
5548 | ||
5549 | sRef ref = exprNode_getSref (e1); | |
5550 | ||
5551 | DPRINTF (("Check assign mod: %s", | |
5552 | sRef_unparseFull (ref))); | |
5553 | ||
5554 | if (sRef_isObserver (ref) | |
28bf4b0b | 5555 | || ((sRef_isFileStatic (ref) || sRef_isFileOrGlobalScope (ref)) |
616915dd | 5556 | && ctype_isArray (ctype_realType (sRef_getType (ref))))) |
5557 | { | |
5558 | sRef base = sRef_getBase (ref); | |
5559 | ||
5560 | if (sRef_isValid (base) && sRef_isObserver (base)) | |
5561 | { | |
5562 | exprNode_checkModify (e1, ret); | |
5563 | } | |
5564 | else | |
5565 | { | |
5566 | exprNode_checkModifyVal (e1, ret); | |
5567 | } | |
5568 | } | |
5569 | else | |
5570 | { | |
5571 | exprNode_checkModify (e1, ret); | |
5572 | } | |
5573 | } | |
5574 | ||
5575 | exprNode | |
5576 | exprNode_assign (/*@only@*/ exprNode e1, | |
5577 | /*@only@*/ exprNode e2, /*@only@*/ lltok op) | |
5578 | { | |
5579 | bool isalloc = FALSE; | |
5580 | bool isjustalloc = FALSE; | |
5581 | exprNode ret; | |
5582 | ||
5583 | DPRINTF (("%s [%s] <- %s [%s]", | |
5584 | exprNode_unparse (e1), | |
5585 | ctype_unparse (e1->typ), | |
5586 | exprNode_unparse (e2), | |
5587 | ctype_unparse (e2->typ))); | |
5588 | ||
5589 | if (lltok_getTok (op) != TASSIGN) | |
5590 | { | |
5591 | ret = exprNode_makeOp (e1, e2, op); | |
5592 | } | |
5593 | else | |
5594 | { | |
5595 | ret = exprNode_createPartialCopy (e1); | |
5596 | ret->kind = XPR_ASSIGN; | |
5597 | ret->edata = exprData_makeOp (e1, e2, op); | |
5598 | ||
5599 | if (!exprNode_isError (e2)) | |
5600 | { | |
5601 | ret->sets = sRefSet_union (ret->sets, e2->sets); | |
5602 | ret->msets = sRefSet_union (ret->msets, e2->msets); | |
5603 | ret->uses = sRefSet_union (ret->uses, e2->uses); | |
5604 | } | |
5605 | } | |
5606 | ||
5607 | checkExpressionDefined (e1, e2, op); | |
5608 | ||
5609 | if (exprNode_isError (e1)) | |
5610 | { | |
5611 | if (!exprNode_isError (e2)) | |
5612 | { | |
5613 | ret->loc = fileloc_update (ret->loc, e2->loc); | |
5614 | } | |
5615 | else | |
5616 | { | |
5617 | ret->loc = fileloc_update (ret->loc, g_currentloc); | |
5618 | } | |
5619 | } | |
5620 | ||
5621 | if (!exprNode_isError (e2)) | |
5622 | { | |
5623 | checkMacroParen (e2); | |
5624 | } | |
5625 | ||
5626 | if (exprNode_isDefined (e1)) | |
5627 | { | |
5628 | if (sRef_isMacroParamRef (e1->sref)) | |
5629 | { | |
5630 | if (context_inIterDef ()) | |
5631 | { | |
5632 | uentry ue = sRef_getUentry (e1->sref); | |
5633 | ||
5634 | if (uentry_isYield (ue)) | |
5635 | { | |
5636 | ; | |
5637 | } | |
5638 | else | |
5639 | { | |
5640 | if (fileloc_isDefined (e1->loc)) | |
5641 | { | |
5642 | voptgenerror | |
5643 | (FLG_MACROPARAMS, | |
5644 | message ("Assignment to non-yield iter parameter: %q", | |
5645 | sRef_unparse (e1->sref)), | |
5646 | e1->loc); | |
5647 | } | |
5648 | else | |
5649 | { | |
5650 | voptgenerror | |
5651 | (FLG_MACROPARAMS, | |
5652 | message ("Assignment to non-yield iter parameter: %q", | |
5653 | sRef_unparse (e1->sref)), | |
5654 | g_currentloc); | |
5655 | } | |
5656 | } | |
5657 | } | |
5658 | else | |
5659 | { | |
5660 | if (fileloc_isDefined (e1->loc)) | |
5661 | { | |
5662 | voptgenerror | |
5663 | (FLG_MACROASSIGN, | |
5664 | message ("Assignment to macro parameter: %q", | |
5665 | sRef_unparse (e1->sref)), | |
5666 | e1->loc); | |
5667 | } | |
5668 | else | |
5669 | { | |
5670 | voptgenerror | |
5671 | (FLG_MACROASSIGN, | |
5672 | message ("Assignment to macro parameter: %q", | |
5673 | sRef_unparse (e1->sref)), | |
5674 | g_currentloc); | |
5675 | } | |
5676 | } | |
5677 | } | |
5678 | else | |
5679 | { | |
5680 | exprNode_checkAssignMod (e1, ret); | |
5681 | } | |
5682 | ||
5683 | if (exprNode_isDefined (e2)) | |
5684 | { | |
5685 | if (lltok_getTok (op) == TASSIGN) | |
5686 | { | |
5687 | ctype te1 = exprNode_getType (e1); | |
5688 | ctype te2 = exprNode_getType (e2); | |
5689 | ||
5690 | if (!ctype_forceMatch (te1, te2)) | |
5691 | { | |
5692 | if (exprNode_matchLiteral (te1, e2)) | |
5693 | { | |
5694 | ; | |
5695 | } | |
5696 | else | |
5697 | { | |
5698 | (void) gentypeerror | |
5699 | (te2, e2, te1, e1, | |
5700 | message ("Assignment of %t to %t: %s %s %s", | |
5701 | te2, te1, exprNode_unparse (e1), | |
5702 | lltok_unparse (op), | |
5703 | exprNode_unparse (e2)), | |
5704 | e1->loc); | |
5705 | } | |
5706 | } | |
5707 | } | |
5708 | ||
5709 | exprNode_mergeUSs (ret, e2); | |
5710 | exprNode_checkUse (ret, e2->sref, e2->loc); | |
5711 | ||
5712 | doAssign (e1, e2, FALSE); | |
5713 | ret->sref = e1->sref; | |
5714 | } | |
5715 | else | |
5716 | { | |
5717 | if (exprNode_isDefined (e2)) | |
5718 | { | |
5719 | exprNode_mergeUSs (ret, e2); | |
5720 | exprNode_checkUse (ret, e2->sref, e2->loc); | |
5721 | } | |
5722 | } | |
5723 | ||
5724 | if (sRef_isPointer (e1->sref) && !sRef_isMacroParamRef (e1->sref)) | |
5725 | { | |
5726 | exprNode_checkUse (ret, sRef_getBase (e1->sref), e1->loc); | |
5727 | } | |
5728 | ||
5729 | isjustalloc = sRef_isJustAllocated (e1->sref); | |
5730 | isalloc = sRef_isAllocated (e1->sref); | |
5731 | ||
5732 | if (sRef_isField (e1->sref)) | |
5733 | { | |
5734 | sRef root = sRef_getRootBase (sRef_getBase (e1->sref)); | |
5735 | ||
5736 | if (!sRef_isAllocated (root) && !sRef_isMacroParamRef (root)) | |
5737 | { | |
5738 | exprNode_checkUse (ret, root, e1->loc); | |
5739 | } | |
5740 | ||
5741 | } | |
5742 | ||
5743 | /* | |
5744 | ** be careful! this defines e1->sref. | |
5745 | */ | |
5746 | ||
5747 | if (!sRef_isMacroParamRef (e1->sref)) | |
5748 | { | |
5749 | exprNode_checkSet (ret, e1->sref); | |
5750 | } | |
5751 | ||
5752 | if (isjustalloc) | |
5753 | { | |
5754 | sRef_setAllocatedComplete (e1->sref, exprNode_isDefined (e2) | |
5755 | ? e2->loc : e1->loc); | |
5756 | } | |
5757 | else | |
5758 | { | |
5759 | if (isalloc) | |
5760 | { | |
5761 | sRef_setAllocatedShallowComplete (e1->sref, exprNode_loc (e2)); | |
5762 | } | |
5763 | } | |
5764 | } | |
5765 | ||
5766 | return ret; | |
5767 | } | |
5768 | ||
5769 | exprNode | |
5770 | exprNode_cond (/*@keep@*/ exprNode pred, /*@keep@*/ exprNode ifclause, | |
5771 | /*@keep@*/ exprNode elseclause) | |
5772 | { | |
5773 | exprNode ret; | |
5774 | ||
5775 | if (!exprNode_isError (pred)) | |
5776 | { | |
5777 | ret = exprNode_createPartialCopy (pred); | |
5778 | checkMacroParen (pred); | |
5779 | exprNode_checkPred (cstring_makeLiteralTemp ("conditional"), pred); | |
5780 | ||
5781 | if (!exprNode_isError (ifclause)) | |
5782 | { | |
5783 | checkMacroParen (ifclause); /* update macro counts! */ | |
5784 | ||
5785 | if (!exprNode_isError (elseclause)) | |
5786 | { | |
5787 | checkMacroParen (elseclause); | |
5788 | ||
5789 | if (!exprNode_matchTypes (ifclause, elseclause)) | |
5790 | { | |
5791 | if (gentypeerror | |
5792 | (exprNode_getType (ifclause), | |
5793 | ifclause, | |
5794 | exprNode_getType (elseclause), | |
5795 | elseclause, | |
5796 | message ("Conditional clauses are not of same type: " | |
5797 | "%s (%t), %s (%t)", | |
5798 | exprNode_unparse (ifclause), | |
5799 | exprNode_getType (ifclause), | |
5800 | exprNode_unparse (elseclause), | |
5801 | exprNode_getType (elseclause)), | |
5802 | ifclause->loc)) | |
5803 | { | |
5804 | ret->sref = sRef_undefined; | |
5805 | ret->typ = ctype_unknown; | |
5806 | } | |
5807 | } | |
5808 | else | |
5809 | { | |
5810 | /* for now...should merge the states */ | |
5811 | ret->sref = ifclause->sref; | |
5812 | ret->typ = ifclause->typ; | |
5813 | ||
5814 | if (exprNode_isNullValue (ifclause)) | |
5815 | { | |
5816 | ret->typ = elseclause->typ; | |
5817 | } | |
5818 | } | |
5819 | ||
5820 | exprNode_checkUse (ret, pred->sref, pred->loc); | |
5821 | exprNode_checkUse (ifclause, ifclause->sref, ifclause->loc); | |
5822 | exprNode_checkUse (elseclause, elseclause->sref, elseclause->loc); | |
5823 | ||
5824 | exprNode_mergeCondUSs (ret, ifclause, elseclause); | |
5825 | ||
5826 | } | |
5827 | else | |
5828 | { | |
5829 | ret->typ = ifclause->typ; | |
5830 | ||
5831 | exprNode_checkUse (pred, pred->sref, pred->loc); | |
5832 | exprNode_checkUse (ifclause, ifclause->sref, ifclause->loc); | |
5833 | ||
5834 | exprNode_mergeCondUSs (ret, ifclause, exprNode_undefined); | |
5835 | } | |
5836 | } | |
5837 | else | |
5838 | { | |
5839 | if (!exprNode_isError (elseclause)) | |
5840 | { | |
5841 | ret->typ = elseclause->typ; | |
5842 | ||
5843 | exprNode_checkUse (pred, pred->sref, pred->loc); | |
5844 | exprNode_checkUse (elseclause, elseclause->sref, elseclause->loc); | |
5845 | ||
5846 | exprNode_mergeCondUSs (ret, exprNode_undefined, elseclause); | |
5847 | } | |
5848 | } | |
5849 | } | |
5850 | else /* pred is error */ | |
5851 | { | |
5852 | if (!exprNode_isError (ifclause)) | |
5853 | { | |
5854 | ret = exprNode_createSemiCopy (ifclause); | |
5855 | ||
5856 | checkMacroParen (ifclause); /* update macro counts! */ | |
5857 | ||
5858 | if (!exprNode_isError (elseclause)) | |
5859 | { | |
5860 | checkMacroParen (elseclause); | |
5861 | ||
5862 | ret->typ = ifclause->typ; | |
5863 | ||
5864 | if (!ctype_forceMatch (ifclause->typ, elseclause->typ)) | |
5865 | { | |
5866 | if (gentypeerror | |
5867 | (exprNode_getType (ifclause), | |
5868 | ifclause, | |
5869 | exprNode_getType (elseclause), | |
5870 | elseclause, | |
5871 | message ("Conditional clauses are not of same type: " | |
5872 | "%s (%t), %s (%t)", | |
5873 | exprNode_unparse (ifclause), | |
5874 | exprNode_getType (ifclause), | |
5875 | exprNode_unparse (elseclause), | |
5876 | exprNode_getType (elseclause)), | |
5877 | ifclause->loc)) | |
5878 | { | |
5879 | ret->typ = ctype_unknown; | |
5880 | } | |
5881 | } | |
5882 | ||
5883 | exprNode_checkUse (ifclause, ifclause->sref, ifclause->loc); | |
5884 | exprNode_checkUse (elseclause, elseclause->sref, elseclause->loc); | |
5885 | ||
5886 | exprNode_mergeCondUSs (ret, ifclause, elseclause); | |
5887 | } | |
5888 | } | |
5889 | else if (!exprNode_isError (elseclause)) /* pred, if errors */ | |
5890 | { | |
5891 | ret = exprNode_createSemiCopy (ifclause); | |
5892 | ||
5893 | ret->typ = elseclause->typ; | |
5894 | checkMacroParen (elseclause); | |
5895 | ||
5896 | exprNode_checkUse (elseclause, elseclause->sref, elseclause->loc); | |
5897 | exprNode_mergeCondUSs (ret, exprNode_undefined, elseclause); | |
5898 | } | |
5899 | else /* all errors! */ | |
5900 | { | |
5901 | ret = exprNode_createLoc (ctype_unknown, g_currentloc); | |
5902 | } | |
5903 | } | |
5904 | ||
5905 | ret->kind = XPR_COND; | |
5906 | ret->edata = exprData_makeCond (pred, ifclause, elseclause); | |
5907 | ||
5908 | if (exprNode_isDefined (ifclause) && exprNode_isDefined (elseclause)) | |
5909 | { | |
5910 | exprNode_combineControl (ret, ifclause, elseclause); | |
5911 | } | |
5912 | ||
5913 | return (ret); | |
5914 | } | |
5915 | ||
5916 | exprNode | |
5917 | exprNode_vaArg (/*@only@*/ lltok tok, /*@only@*/ exprNode arg, /*@only@*/ qtype qt) | |
5918 | { | |
5919 | ctype totype = qtype_getType (qt); | |
5920 | exprNode ret = | |
5921 | exprNode_createPartialLocCopy (arg, fileloc_copy (lltok_getLoc (tok))); | |
5922 | ctype targ; | |
5923 | ||
5924 | /* | |
5925 | ** check use of va_arg : <valist>, type -> type | |
5926 | */ | |
5927 | ||
5928 | if (exprNode_isError (arg)) | |
5929 | { | |
5930 | } | |
5931 | else | |
5932 | { | |
5933 | targ = exprNode_getType (arg); | |
5934 | ||
5935 | /* | |
5936 | ** arg should have be a pointer | |
5937 | */ | |
5938 | ||
5939 | if (!ctype_isUA (targ) || | |
5940 | (!usymId_equal (ctype_typeId (targ), | |
5941 | usymtab_getTypeId (cstring_makeLiteralTemp ("va_list"))))) | |
5942 | { | |
5943 | voptgenerror | |
5944 | (FLG_TYPE, | |
5945 | message ("First argument to va_arg is not a va_list (type %t): %s", | |
5946 | targ, exprNode_unparse (arg)), | |
5947 | arg->loc); | |
5948 | } | |
5949 | ||
5950 | exprNode_checkSet (ret, arg->sref); | |
5951 | } | |
5952 | ||
5953 | /* | |
5954 | ** return type is totype | |
5955 | */ | |
5956 | ||
5957 | ret->typ = totype; | |
5958 | ret->kind = XPR_VAARG; | |
5959 | ret->edata = exprData_makeCast (tok, arg, qt); | |
5960 | ||
5961 | return (ret); | |
5962 | } | |
5963 | ||
5964 | exprNode exprNode_labelMarker (/*@only@*/ cstring label) | |
5965 | { | |
5966 | exprNode ret = exprNode_createPlain (ctype_undefined); | |
5967 | ret->kind = XPR_LABEL; | |
5968 | ret->edata = exprData_makeLiteral (label); | |
5969 | ret->isJumpPoint = TRUE; | |
5970 | ||
5971 | return (ret); /* for now, ignore label */ | |
5972 | } | |
5973 | ||
5974 | exprNode exprNode_notReached (/*@returned@*/ exprNode stmt) | |
5975 | { | |
5976 | if (exprNode_isDefined (stmt)) | |
5977 | { | |
5978 | stmt->isJumpPoint = TRUE; | |
5979 | ||
5980 | /* This prevent stray no return path errors, etc. */ | |
5981 | stmt->exitCode = XK_MUSTEXIT; | |
5982 | } | |
5983 | ||
5984 | return (stmt); | |
5985 | } | |
5986 | ||
5987 | bool exprNode_isDefaultMarker (exprNode e) | |
5988 | { | |
5989 | if (exprNode_isDefined (e)) | |
5990 | { | |
5991 | return (e->kind == XPR_DEFAULT || e->kind == XPR_FTDEFAULT); | |
5992 | } | |
5993 | ||
5994 | return FALSE; | |
5995 | } | |
5996 | ||
5997 | bool exprNode_isCaseMarker (exprNode e) | |
5998 | { | |
5999 | if (exprNode_isDefined (e)) | |
6000 | { | |
6001 | return (e->kind == XPR_FTCASE || e->kind == XPR_CASE); | |
6002 | } | |
6003 | ||
6004 | return FALSE; | |
6005 | } | |
6006 | ||
6007 | bool exprNode_isLabelMarker (exprNode e) | |
6008 | { | |
6009 | if (exprNode_isDefined (e)) | |
6010 | { | |
6011 | return (e->kind == XPR_LABEL); | |
6012 | } | |
6013 | ||
6014 | return FALSE; | |
6015 | } | |
6016 | ||
6017 | exprNode exprNode_caseMarker (/*@only@*/ exprNode test, bool fallThrough) | |
6018 | { | |
6019 | exprNode ret = exprNode_createPartialCopy (test); | |
6020 | ||
6021 | ret->kind = fallThrough ? XPR_FTCASE : XPR_CASE; | |
6022 | ||
6023 | if (exprNode_isError (test)) { | |
6024 | return ret; | |
6025 | } | |
6026 | ||
6027 | exprNode_checkUse (ret, test->sref, test->loc); | |
6028 | ||
6029 | usymtab_setExitCode (ret->exitCode); | |
6030 | ||
6031 | if (ret->mustBreak) | |
6032 | { | |
6033 | usymtab_setMustBreak (); | |
6034 | } | |
6035 | ||
6036 | ret->edata = exprData_makeSingle (test); | |
6037 | ret->isJumpPoint = TRUE; | |
6038 | ||
6039 | return ret; | |
6040 | } | |
6041 | ||
6042 | # if 0 | |
6043 | exprNode exprNode_caseStatement (/*@only@*/ exprNode test, /*@only@*/ exprNode stmt, bool fallThrough) | |
6044 | { | |
6045 | exprNode ret = exprNode_createPartialCopy (test); | |
6046 | ||
6047 | ret->kind = fallThrough ? XPR_FTCASE : XPR_CASE; | |
6048 | ret->edata = exprData_makePair (test, stmt); | |
6049 | ret->isJumpPoint = TRUE; | |
6050 | ||
6051 | if (exprNode_isError (test)) | |
6052 | { | |
6053 | return ret; | |
6054 | } | |
6055 | ||
6056 | exprNode_checkUse (ret, test->sref, test->loc); | |
6057 | ||
6058 | if (exprNode_isError (stmt)) | |
6059 | { | |
6060 | return ret; | |
6061 | } | |
6062 | ||
6063 | exprNode_mergeUSs (ret, stmt); | |
6064 | ||
6065 | ret->exitCode = stmt->exitCode; | |
6066 | ret->mustBreak = stmt->mustBreak; | |
6067 | ret->canBreak = stmt->canBreak; | |
6068 | ||
6069 | usymtab_setExitCode (ret->exitCode); | |
6070 | ||
6071 | if (ret->mustBreak) | |
6072 | { | |
6073 | usymtab_setMustBreak (); | |
6074 | } | |
6075 | ||
6076 | return ret; | |
6077 | } | |
6078 | # endif | |
6079 | ||
6080 | /*@notnull@*/ /*@only@*/ exprNode | |
6081 | exprNode_defaultMarker (/*@only@*/ lltok def, bool fallThrough) | |
6082 | { | |
6083 | exprNode ret = exprNode_createTok (def); | |
6084 | ||
6085 | ret->isJumpPoint = TRUE; | |
6086 | ret->kind = fallThrough ? XPR_FTDEFAULT : XPR_DEFAULT; | |
6087 | return (ret); | |
6088 | } | |
6089 | ||
6090 | bool | |
6091 | exprNode_mayEscape (exprNode e) | |
6092 | { | |
6093 | if (exprNode_isDefined (e)) | |
6094 | { | |
6095 | return exitkind_couldEscape (e->exitCode); | |
6096 | } | |
6097 | return FALSE; | |
6098 | } | |
6099 | ||
6100 | static bool | |
6101 | exprNode_mustBreak (exprNode e) | |
6102 | { | |
6103 | if (exprNode_isDefined (e)) | |
6104 | { | |
6105 | return e->mustBreak; | |
6106 | } | |
6107 | return FALSE; | |
6108 | } | |
6109 | ||
6110 | bool | |
6111 | exprNode_mustEscape (exprNode e) | |
6112 | { | |
6113 | if (exprNode_isDefined (e)) | |
6114 | { | |
6115 | return exitkind_mustEscape (e->exitCode) || exprNode_mustBreak (e); | |
6116 | } | |
6117 | ||
6118 | return FALSE; | |
6119 | } | |
6120 | ||
6121 | bool | |
6122 | exprNode_errorEscape (exprNode e) | |
6123 | { | |
6124 | if (exprNode_isDefined (e)) | |
6125 | { | |
6126 | return exitkind_isError (e->exitCode); | |
6127 | } | |
6128 | ||
6129 | return FALSE; | |
6130 | } | |
6131 | ||
6132 | exprNode exprNode_concat (/*@only@*/ exprNode e1, /*@only@*/ exprNode e2) | |
6133 | { | |
6134 | exprNode ret = exprNode_createPartialCopy (e1); | |
6135 | ||
28bf4b0b | 6136 | DPRINTF (("Concat: %s / %s", exprNode_unparse (e1), exprNode_unparse (e2))); |
6137 | ||
616915dd | 6138 | ret->edata = exprData_makePair (e1, e2); |
6139 | ret->kind = XPR_STMTLIST; | |
6140 | ||
6141 | if (exprNode_isDefined (e1)) | |
6142 | { | |
6143 | ret->isJumpPoint = e1->isJumpPoint; | |
6144 | ret->canBreak = e1->canBreak; | |
6145 | } | |
6146 | else | |
6147 | { | |
6148 | if (exprNode_isDefined (e2)) | |
6149 | { | |
6150 | ret->loc = fileloc_update (ret->loc, e2->loc); | |
6151 | } | |
6152 | } | |
6153 | ||
6154 | if (exprNode_isDefined (e2)) | |
6155 | { | |
6156 | ret->exitCode = e2->exitCode; | |
6157 | ret->mustBreak = e2->mustBreak; | |
6158 | if (e2->canBreak) ret->canBreak = TRUE; | |
6159 | } | |
6160 | ||
6161 | /* | |
6162 | ** if e1 must return, then e2 is unreachable! | |
6163 | */ | |
6164 | ||
6165 | if (exprNode_isDefined (e1) && exprNode_isDefined (e2)) | |
6166 | { | |
6167 | if ((exprNode_mustEscape (e1) || exprNode_mustBreak (e1)) | |
6168 | && !(e2->isJumpPoint)) | |
6169 | { | |
6170 | if (context_getFlag (FLG_UNREACHABLE)) | |
6171 | { | |
6172 | exprNode nr = e2; | |
6173 | ||
6174 | if (e2->kind == XPR_STMT) | |
6175 | { | |
6176 | nr = exprData_getUopNode (e2->edata); | |
6177 | } | |
6178 | ||
6179 | if ((nr->kind == XPR_TOK | |
6180 | && lltok_isSemi (exprData_getTok (nr->edata)))) | |
6181 | { | |
6182 | /* okay to have unreachable ";" */ | |
6183 | ret->exitCode = XK_MUSTEXIT; | |
6184 | ret->canBreak = TRUE; | |
6185 | } | |
6186 | else | |
6187 | { | |
6188 | if (optgenerror (FLG_UNREACHABLE, | |
6189 | message ("Unreachable code: %s", | |
6190 | exprNode_unparseFirst (nr)), | |
6191 | exprNode_loc (nr))) | |
6192 | { | |
6193 | ret->isJumpPoint = TRUE; | |
6194 | ret->mustBreak = FALSE; | |
6195 | ret->exitCode = XK_ERROR; | |
6196 | DPRINTF (("Jump point: %s", exprNode_unparse (ret))); | |
6197 | } | |
6198 | else | |
6199 | { | |
6200 | ret->exitCode = XK_MUSTEXIT; | |
6201 | ret->canBreak = TRUE; | |
6202 | } | |
6203 | ||
6204 | } | |
6205 | } | |
6206 | } | |
6207 | else | |
6208 | { | |
6209 | if ((e2->kind == XPR_CASE || e2->kind == XPR_DEFAULT)) | |
6210 | { | |
6211 | /* | |
6212 | ** We want a warning anytime we have: | |
6213 | ** case xxx: ... | |
6214 | ** yyy; <<<- no break or return | |
6215 | ** case zzz: ... | |
6216 | */ | |
6217 | ||
6218 | exprNode lastStmt = exprNode_lastStatement (e1); | |
6219 | ||
6220 | if (exprNode_isDefined (lastStmt) | |
6221 | && !exprNode_mustEscape (lastStmt) | |
6222 | && !exprNode_mustBreak (lastStmt) | |
6223 | && !exprNode_isCaseMarker (lastStmt) | |
6224 | && !exprNode_isDefaultMarker (lastStmt) | |
6225 | && !exprNode_isLabelMarker (lastStmt)) | |
6226 | { | |
6227 | voptgenerror (FLG_CASEBREAK, | |
6228 | cstring_makeLiteral | |
6229 | ("Fall through case (no preceeding break)"), | |
6230 | e2->loc); | |
6231 | } | |
6232 | } | |
6233 | } | |
6234 | } | |
6235 | ||
6236 | exprNode_mergeUSs (ret, e2); | |
28bf4b0b | 6237 | |
616915dd | 6238 | usymtab_setExitCode (ret->exitCode); |
6239 | ||
6240 | if (ret->mustBreak) | |
6241 | { | |
6242 | usymtab_setMustBreak (); | |
6243 | } | |
6244 | ||
6245 | return ret; | |
6246 | } | |
6247 | ||
6248 | exprNode exprNode_createTok (/*@only@*/ lltok t) | |
6249 | { | |
28bf4b0b | 6250 | exprNode ret; /*@i23 if on same line, bad things happen...!@*/ |
6251 | ret = exprNode_create (ctype_unknown); | |
616915dd | 6252 | ret->kind = XPR_TOK; |
6253 | ret->edata = exprData_makeTok (t); | |
6254 | return ret; | |
6255 | } | |
6256 | ||
6257 | exprNode exprNode_statement (/*@only@*/ exprNode e, /*@only@*/ lltok t) | |
6258 | { | |
6259 | if (!exprNode_isError (e)) | |
6260 | { | |
6261 | exprNode_checkStatement(e); | |
6262 | } | |
6263 | ||
6264 | return (exprNode_statementError (e, t)); | |
6265 | } | |
6266 | ||
6267 | static exprNode exprNode_statementError (/*@only@*/ exprNode e, /*@only@*/ lltok t) | |
6268 | { | |
6269 | exprNode ret = exprNode_createPartialCopy (e); | |
6270 | ||
6271 | if (!exprNode_isError (e)) | |
6272 | { | |
6273 | if (e->kind != XPR_ASSIGN) | |
6274 | { | |
6275 | exprNode_checkUse (ret, e->sref, e->loc); | |
6276 | } | |
6277 | ||
6278 | ret->exitCode = e->exitCode; | |
6279 | ret->canBreak = e->canBreak; | |
6280 | ret->mustBreak = e->mustBreak; | |
6281 | } | |
6282 | ||
6283 | ret->edata = exprData_makeUop (e, t); | |
6284 | ret->kind = XPR_STMT; | |
6285 | ||
6286 | return ret; | |
6287 | } | |
6288 | ||
6289 | exprNode exprNode_checkExpr (/*@returned@*/ exprNode e) | |
6290 | { | |
6291 | if (!exprNode_isError (e)) | |
6292 | { | |
6293 | if (e->kind != XPR_ASSIGN) | |
6294 | { | |
6295 | exprNode_checkUse (e, e->sref, e->loc); | |
6296 | } | |
6297 | } | |
6298 | ||
6299 | return e; | |
6300 | } | |
6301 | ||
6302 | void exprNode_produceGuards (exprNode pred) | |
6303 | { | |
6304 | if (!exprNode_isError (pred)) | |
6305 | { | |
6306 | if (ctype_isRealPointer (pred->typ)) | |
6307 | { | |
6308 | pred->guards = guardSet_addTrueGuard (pred->guards, pred->sref); | |
6309 | } | |
6310 | ||
6311 | exprNode_checkUse (pred, pred->sref, pred->loc); | |
6312 | exprNode_resetSref (pred); | |
6313 | } | |
6314 | } | |
6315 | ||
6316 | exprNode exprNode_makeBlock (/*@only@*/ exprNode e) | |
6317 | { | |
6318 | exprNode ret = exprNode_createPartialCopy (e); | |
6319 | ||
6320 | if (!exprNode_isError (e)) | |
6321 | { | |
6322 | ret->exitCode = e->exitCode; | |
6323 | ret->canBreak = e->canBreak; | |
6324 | ret->mustBreak = e->mustBreak; | |
6325 | } | |
6326 | ||
6327 | ret->edata = exprData_makeSingle (e); | |
6328 | ret->kind = XPR_BLOCK; | |
6329 | return ret; | |
6330 | } | |
6331 | ||
6332 | bool exprNode_isBlock (exprNode e) | |
6333 | { | |
6334 | return (exprNode_isDefined (e) | |
6335 | && ((e)->kind == XPR_BLOCK)); | |
6336 | } | |
6337 | ||
6338 | bool exprNode_isAssign (exprNode e) | |
6339 | { | |
6340 | if (exprNode_isDefined (e)) | |
6341 | { | |
6342 | return (e->kind == XPR_ASSIGN); | |
6343 | } | |
6344 | ||
6345 | return FALSE; | |
6346 | } | |
6347 | ||
6348 | bool exprNode_isEmptyStatement (exprNode e) | |
6349 | { | |
6350 | return (exprNode_isDefined (e) | |
6351 | && (e->kind == XPR_TOK) | |
6352 | && (lltok_isSemi (exprData_getTok (e->edata)))); | |
6353 | } | |
6354 | ||
6355 | exprNode exprNode_if (/*@only@*/ exprNode pred, /*@only@*/ exprNode tclause) | |
6356 | { | |
6357 | exprNode ret; | |
6358 | bool emptyErr = FALSE; | |
6359 | ||
6360 | if (context_maybeSet (FLG_IFEMPTY)) | |
6361 | { | |
6362 | if (exprNode_isEmptyStatement (tclause)) | |
6363 | { | |
6364 | emptyErr = optgenerror (FLG_IFEMPTY, | |
6365 | cstring_makeLiteral | |
6366 | ("Body of if statement is empty"), | |
6367 | exprNode_loc (tclause)); | |
6368 | } | |
6369 | } | |
6370 | ||
6371 | if (!emptyErr && context_maybeSet (FLG_IFBLOCK)) | |
6372 | { | |
6373 | if (exprNode_isDefined (tclause) | |
6374 | && !exprNode_isBlock (tclause)) | |
6375 | { | |
6376 | voptgenerror (FLG_IFBLOCK, | |
6377 | message | |
6378 | ("Body of if statement is not a block: %s", | |
6379 | exprNode_unparse (tclause)), | |
6380 | exprNode_loc (tclause)); | |
6381 | } | |
6382 | } | |
6383 | ||
6384 | if (exprNode_isError (pred)) | |
6385 | { | |
6386 | if (exprNode_isError (tclause)) | |
6387 | { | |
6388 | ret = exprNode_createLoc (ctype_unknown, g_currentloc); | |
6389 | } | |
6390 | else | |
6391 | { | |
6392 | ret = exprNode_createPartialCopy (tclause); | |
6393 | } | |
6394 | } | |
6395 | else | |
6396 | { | |
6397 | if (exprNode_mustEscape (pred)) | |
6398 | { | |
6399 | voptgenerror | |
6400 | (FLG_UNREACHABLE, | |
6401 | message ("Predicate always exits: %s", exprNode_unparse (pred)), | |
6402 | exprNode_loc (pred)); | |
6403 | } | |
6404 | ||
6405 | exprNode_checkPred (cstring_makeLiteralTemp ("if"), pred); | |
6406 | exprNode_checkUse (pred, pred->sref, pred->loc); | |
6407 | ||
6408 | if (!exprNode_isError (tclause)) | |
6409 | { | |
6410 | exprNode_mergeCondUSs (pred, tclause, exprNode_undefined); | |
6411 | } | |
6412 | ||
6413 | ret = exprNode_createPartialCopy (pred); | |
6414 | } | |
6415 | ||
6416 | ret->kind = XPR_IF; | |
6417 | ret->edata = exprData_makePair (pred, tclause); | |
6418 | ||
6419 | ret->exitCode = XK_UNKNOWN; | |
6420 | ||
6421 | if (exprNode_isDefined (tclause)) | |
6422 | { | |
6423 | ret->exitCode = exitkind_makeConditional (tclause->exitCode); | |
6424 | ret->canBreak = tclause->canBreak; | |
6425 | ret->sets = sRefSet_union (ret->sets, tclause->sets); | |
6426 | ret->msets = sRefSet_union (ret->msets, tclause->msets); | |
6427 | ret->uses = sRefSet_union (ret->uses, tclause->uses); | |
6428 | } | |
6429 | ||
6430 | ret->mustBreak = FALSE; | |
6431 | ||
6432 | return ret; | |
6433 | } | |
6434 | ||
6435 | exprNode exprNode_ifelse (/*@only@*/ exprNode pred, | |
6436 | /*@only@*/ exprNode tclause, | |
6437 | /*@only@*/ exprNode eclause) | |
6438 | { | |
6439 | exprNode ret; | |
6440 | bool tEmptyErr = FALSE; | |
6441 | bool eEmptyErr = FALSE; | |
6442 | ||
6443 | if (context_maybeSet (FLG_IFEMPTY)) | |
6444 | { | |
6445 | if (exprNode_isEmptyStatement (tclause)) | |
6446 | { | |
6447 | tEmptyErr = optgenerror | |
6448 | (FLG_IFEMPTY, | |
6449 | cstring_makeLiteral | |
6450 | ("Body of if clause of if statement is empty"), | |
6451 | exprNode_loc (tclause)); | |
6452 | } | |
6453 | ||
6454 | if (exprNode_isEmptyStatement (eclause)) | |
6455 | { | |
6456 | eEmptyErr = optgenerror | |
6457 | (FLG_IFEMPTY, | |
6458 | cstring_makeLiteral | |
6459 | ("Body of else clause of if statement is empty"), | |
6460 | exprNode_loc (eclause)); | |
6461 | } | |
6462 | } | |
6463 | ||
6464 | if (context_maybeSet (FLG_IFBLOCK)) | |
6465 | { | |
6466 | if (!tEmptyErr | |
6467 | && exprNode_isDefined (tclause) | |
6468 | && !exprNode_isBlock (tclause)) | |
6469 | { | |
6470 | voptgenerror (FLG_IFBLOCK, | |
6471 | message | |
6472 | ("Body of if clause of if statement is not a block: %s", | |
6473 | exprNode_unparse (tclause)), | |
6474 | exprNode_loc (tclause)); | |
6475 | } | |
6476 | ||
6477 | if (!eEmptyErr | |
6478 | && exprNode_isDefined (eclause) | |
6479 | && !exprNode_isBlock (eclause) | |
6480 | && !(eclause->kind == XPR_IF) | |
6481 | && !(eclause->kind == XPR_IFELSE)) | |
6482 | { | |
6483 | voptgenerror | |
6484 | (FLG_IFBLOCK, | |
6485 | message | |
6486 | ("Body of else clause of if statement is not a block: %s", | |
6487 | exprNode_unparse (eclause)), | |
6488 | exprNode_loc (eclause)); | |
6489 | } | |
6490 | } | |
6491 | ||
6492 | if (context_maybeSet (FLG_ELSEIFCOMPLETE)) | |
6493 | { | |
6494 | if (exprNode_isDefined (eclause) | |
6495 | && (eclause->kind == XPR_IF)) | |
6496 | { | |
6497 | voptgenerror (FLG_ELSEIFCOMPLETE, | |
6498 | message ("Incomplete else if logic (no final else): %s", | |
6499 | exprNode_unparse (eclause)), | |
6500 | exprNode_loc (eclause)); | |
6501 | } | |
6502 | } | |
6503 | ||
6504 | if (exprNode_isError (pred)) | |
6505 | { | |
6506 | if (exprNode_isError (tclause)) | |
6507 | { | |
6508 | if (exprNode_isError (eclause)) | |
6509 | { | |
6510 | ret = exprNode_createLoc (ctype_unknown, g_currentloc); | |
6511 | } | |
6512 | else | |
6513 | { | |
6514 | ret = exprNode_createPartialCopy (eclause); | |
6515 | } | |
6516 | } | |
6517 | else | |
6518 | { | |
6519 | ret = exprNode_createPartialCopy (tclause); | |
6520 | } | |
6521 | } | |
6522 | else /* pred is okay */ | |
6523 | { | |
6524 | ret = exprNode_createPartialCopy (pred); | |
6525 | ||
6526 | if (exprNode_mustEscape (pred)) | |
6527 | { | |
6528 | voptgenerror | |
6529 | (FLG_UNREACHABLE, | |
6530 | message ("Predicate always exits: %s", exprNode_unparse (pred)), | |
6531 | exprNode_loc (pred)); | |
6532 | } | |
6533 | ||
6534 | exprNode_checkPred (cstring_makeLiteralTemp ("if"), pred); | |
6535 | exprNode_checkUse (ret, pred->sref, pred->loc); | |
6536 | ||
6537 | exprNode_mergeCondUSs (ret, tclause, eclause); | |
6538 | } | |
6539 | ||
6540 | ret->kind = XPR_IFELSE; | |
6541 | ret->edata = exprData_makeCond (pred, tclause, eclause); | |
6542 | ||
6543 | if (exprNode_isDefined (tclause) && exprNode_isDefined (eclause)) | |
6544 | { | |
6545 | exprNode_combineControl (ret, tclause, eclause); | |
6546 | ret->loc = fileloc_update (ret->loc, eclause->loc); | |
6547 | } | |
6548 | ||
6549 | return ret; | |
6550 | } | |
6551 | ||
6552 | /* | |
6553 | ** *allpaths <- TRUE iff all executions paths must go through the switch | |
6554 | */ | |
6555 | ||
6556 | static bool | |
6557 | checkSwitchExpr (exprNode test, /*@dependent@*/ exprNode e, /*@out@*/ bool *allpaths) | |
6558 | { | |
6559 | exprNodeSList el = exprNode_flatten (e); | |
6560 | bool mustReturn = TRUE; /* find a branch that doesn't */ | |
6561 | bool thisReturn = FALSE; | |
6562 | bool hasDefault = FALSE; | |
6563 | bool hasAllMembers = FALSE; | |
6564 | bool inSwitch = FALSE; | |
6565 | bool isEnumSwitch = FALSE; | |
6566 | bool canBreak = FALSE; | |
6567 | bool fallThrough = FALSE; | |
6568 | ctype ct = ctype_unknown; | |
6569 | enumNameSList usedEnums; | |
6570 | enumNameList enums; | |
6571 | ||
6572 | if (exprNode_isDefined (test)) | |
6573 | { | |
6574 | ctype ttype; | |
6575 | ||
6576 | ct = test->typ; | |
6577 | ttype = ctype_realType (ct); | |
6578 | ||
6579 | if (ctype_isEnum (ttype)) | |
6580 | { | |
6581 | isEnumSwitch = TRUE; | |
6582 | enums = ctype_elist (ttype); | |
6583 | usedEnums = enumNameSList_new (); | |
6584 | } | |
6585 | } | |
6586 | ||
6587 | exprNodeSList_elements (el, current) | |
6588 | { | |
6589 | if (exprNode_isDefined (current)) | |
6590 | { | |
6591 | switch (current->kind) | |
6592 | { | |
6593 | case XPR_FTDEFAULT: | |
6594 | case XPR_DEFAULT: | |
6595 | if (hasDefault) | |
6596 | { | |
6597 | voptgenerror | |
6598 | (FLG_CONTROL, | |
6599 | message ("Duplicate default cases in switch"), | |
6600 | exprNode_loc (current)); | |
6601 | } | |
6602 | /*@fallthrough@*/ | |
6603 | case XPR_FTCASE: | |
6604 | case XPR_CASE: | |
6605 | if (current->kind == XPR_DEFAULT || current->kind == XPR_FTDEFAULT) | |
6606 | { | |
6607 | hasDefault = TRUE; | |
6608 | } | |
6609 | else | |
6610 | { | |
6611 | if (isEnumSwitch) | |
6612 | { | |
6613 | exprNode st = exprData_getSingle (current->edata); | |
6614 | uentry ue = exprNode_getUentry (st); | |
6615 | ||
6616 | if (uentry_isValid (ue)) | |
6617 | { | |
6618 | cstring cname = uentry_rawName (ue); | |
6619 | ||
6620 | if (enumNameList_member (/*@-usedef@*/enums/*@=usedef@*/, cname)) | |
6621 | { | |
6622 | if (enumNameSList_member | |
6623 | (/*@-usedef@*/usedEnums/*@=usedef@*/, cname)) | |
6624 | { | |
6625 | voptgenerror | |
6626 | (FLG_CONTROL, | |
6627 | message ("Duplicate case in switch: %s", | |
6628 | cname), | |
6629 | current->loc); | |
6630 | } | |
6631 | else | |
6632 | { | |
6633 | enumNameSList_addh (usedEnums, cname); | |
6634 | } | |
6635 | } | |
6636 | else | |
6637 | { | |
6638 | voptgenerror | |
6639 | (FLG_TYPE, | |
6640 | message ("Case in switch not %s member: %s", | |
6641 | ctype_unparse (ct), cname), | |
6642 | current->loc); | |
6643 | } | |
6644 | } | |
6645 | } | |
6646 | } | |
6647 | ||
6648 | if (inSwitch && !fallThrough) | |
6649 | { | |
6650 | if (!thisReturn || canBreak) | |
6651 | { | |
6652 | mustReturn = FALSE; | |
6653 | } | |
6654 | } | |
6655 | ||
6656 | fallThrough = TRUE; | |
6657 | inSwitch = TRUE; | |
6658 | thisReturn = FALSE; | |
6659 | canBreak = FALSE; | |
6660 | /*@switchbreak@*/ break; | |
6661 | default: | |
6662 | thisReturn = thisReturn || exprNode_mustEscape (current); | |
6663 | canBreak = canBreak || current->canBreak; | |
6664 | if (canBreak) fallThrough = FALSE; | |
6665 | } | |
6666 | } | |
6667 | } end_exprNodeSList_elements; | |
6668 | ||
6669 | if (inSwitch) /* check the last one! */ | |
6670 | { | |
6671 | if (!thisReturn || canBreak) | |
6672 | { | |
6673 | mustReturn = FALSE; | |
6674 | } | |
6675 | } | |
6676 | ||
6677 | if (isEnumSwitch) | |
6678 | { | |
6679 | if (!hasDefault | |
6680 | && (enumNameSList_size (/*@-usedef@*/usedEnums/*@=usedef@*/) != | |
6681 | enumNameList_size (/*@-usedef@*/enums/*@=usedef@*/))) | |
6682 | { | |
6683 | enumNameSList unused = enumNameSList_subtract (enums, usedEnums); | |
6684 | ||
6685 | voptgenerror (FLG_MISSCASE, | |
6686 | message ("Missing case%s in switch: %q", | |
6687 | cstring_makeLiteralTemp | |
6688 | ((enumNameSList_size (unused) > 1) ? "s" : ""), | |
6689 | enumNameSList_unparse (unused)), | |
6690 | g_currentloc); | |
6691 | ||
6692 | enumNameSList_free (unused); | |
6693 | } | |
6694 | else | |
6695 | { | |
6696 | hasAllMembers = TRUE; | |
6697 | *allpaths = TRUE; | |
6698 | } | |
6699 | ||
6700 | enumNameSList_free (usedEnums); | |
6701 | } | |
6702 | else | |
6703 | { | |
6704 | *allpaths = hasDefault; | |
6705 | } | |
6706 | ||
6707 | exprNodeSList_free (el); | |
6708 | return ((hasDefault || hasAllMembers) && mustReturn); | |
6709 | } | |
6710 | ||
6711 | exprNode exprNode_switch (/*@only@*/ exprNode e, /*@only@*/ exprNode s) | |
6712 | { | |
6713 | exprNode ret = exprNode_createPartialCopy (e); | |
6714 | bool allpaths; | |
6715 | ||
6716 | DPRINTF (("Switch: %s", exprNode_unparse (s))); | |
6717 | ||
6718 | ret->kind = XPR_SWITCH; | |
6719 | ret->edata = exprData_makePair (e, s); | |
6720 | ||
6721 | if (!exprNode_isError (s)) | |
6722 | { | |
6723 | exprNode fs = exprNode_firstStatement (s); | |
6724 | ret->loc = fileloc_update (ret->loc, s->loc); | |
6725 | ||
6726 | if (exprNode_isUndefined (fs) | |
6727 | || exprNode_isCaseMarker (fs) || exprNode_isLabelMarker (fs) | |
6728 | || exprNode_isDefaultMarker (fs)) { | |
6729 | ; | |
6730 | } else { | |
6731 | voptgenerror (FLG_FIRSTCASE, | |
6732 | message | |
6733 | ("Statement after switch is not a case: %s", exprNode_unparse (fs)), | |
6734 | fs->loc); | |
6735 | } | |
6736 | } | |
6737 | ||
6738 | if (!exprNode_isError (e)) | |
6739 | { | |
6740 | if (checkSwitchExpr (e, s, &allpaths)) | |
6741 | { | |
6742 | ret->exitCode = XK_MUSTRETURN; | |
6743 | } | |
6744 | else | |
6745 | { | |
6746 | ret->exitCode = e->exitCode; | |
6747 | } | |
6748 | ||
6749 | ret->canBreak = e->canBreak; | |
6750 | ret->mustBreak = e->mustBreak; | |
6751 | } | |
6752 | /* | |
6753 | ** forgot this! | |
6754 | ** exprNode.c:3883,32: Variable allpaths used before definition | |
6755 | */ | |
6756 | else | |
6757 | { | |
6758 | allpaths = FALSE; | |
6759 | } | |
6760 | ||
6761 | DPRINTF (("Context exit switch!")); | |
6762 | context_exitSwitch (ret, allpaths); | |
6763 | DPRINTF (("Context exit switch done!")); | |
6764 | ||
6765 | return ret; | |
6766 | } | |
6767 | ||
6768 | static void checkInfiniteLoop (/*@notnull@*/ exprNode test, | |
6769 | /*@notnull@*/ exprNode body) | |
6770 | { | |
6771 | sRefSet tuses = test->uses; | |
6772 | ||
6773 | if (!sRefSet_isEmpty (test->uses)) | |
6774 | { | |
6775 | sRefSet sets = sRefSet_newCopy (body->sets); | |
6776 | bool hasError = TRUE; | |
6777 | bool innerState = FALSE; | |
6778 | sRefSet tuncon = sRefSet_undefined; | |
6779 | ||
6780 | sets = sRefSet_union (sets, test->sets); | |
6781 | sets = sRefSet_union (sets, body->msets); | |
6782 | sets = sRefSet_union (sets, test->msets); | |
6783 | ||
6784 | sRefSet_allElements (tuses, el) | |
6785 | { | |
6786 | if (sRef_isUnconstrained (el)) | |
6787 | { | |
6788 | tuncon = sRefSet_insert (tuncon, el); | |
6789 | } | |
6790 | else | |
6791 | { | |
6792 | if (sRefSet_member (sets, el)) | |
6793 | { | |
6794 | hasError = FALSE; | |
6795 | break; | |
6796 | } | |
6797 | } | |
6798 | ||
6799 | if (sRef_isInternalState (el) | |
6800 | || sRef_isFileStatic (sRef_getRootBase (el))) | |
6801 | { | |
6802 | innerState = TRUE; | |
6803 | } | |
6804 | } end_sRefSet_allElements ; | |
6805 | ||
6806 | if (hasError) | |
6807 | { | |
6808 | sRefSet suncon = sRefSet_undefined; | |
6809 | bool sinner = FALSE; | |
6810 | ||
6811 | sRefSet_allElements (sets, el) | |
6812 | { | |
6813 | if (sRef_isUnconstrained (el)) | |
6814 | { | |
6815 | suncon = sRefSet_insert (suncon, el); | |
6816 | } | |
6817 | else if (sRef_isInternalState (el)) | |
6818 | { | |
6819 | sinner = TRUE; | |
6820 | } | |
6821 | else | |
6822 | { | |
6823 | ; | |
6824 | } | |
6825 | } end_sRefSet_allElements ; | |
6826 | ||
6827 | if (sinner && innerState) | |
6828 | { | |
6829 | ; | |
6830 | } | |
6831 | else if (sRefSet_isEmpty (tuncon) | |
6832 | && sRefSet_isEmpty (suncon)) | |
6833 | { | |
6834 | voptgenerror | |
6835 | (FLG_INFLOOPS, | |
6836 | message | |
6837 | ("Suspected infinite loop. No value used in loop test (%q) " | |
6838 | "is modified by test or loop body.", | |
6839 | sRefSet_unparsePlain (tuses)), | |
6840 | test->loc); | |
6841 | } | |
6842 | else | |
6843 | { | |
6844 | if (sRefSet_isEmpty (tuncon)) | |
6845 | { | |
6846 | voptgenerror | |
6847 | (FLG_INFLOOPSUNCON, | |
6848 | message ("Suspected infinite loop. No condition values " | |
6849 | "modified. Modification possible through " | |
6850 | "unconstrained calls: %q", | |
6851 | sRefSet_unparsePlain (suncon)), | |
6852 | test->loc); | |
6853 | } | |
6854 | else | |
6855 | { | |
6856 | voptgenerror | |
6857 | (FLG_INFLOOPSUNCON, | |
6858 | message ("Suspected infinite loop. No condition values " | |
6859 | "modified. Possible undetected dependency through " | |
6860 | "unconstrained calls in loop test: %q", | |
6861 | sRefSet_unparsePlain (tuncon)), | |
6862 | test->loc); | |
6863 | } | |
6864 | } | |
6865 | } | |
6866 | ||
6867 | sRefSet_free (sets); | |
6868 | } | |
6869 | } | |
6870 | ||
6871 | exprNode exprNode_while (/*@keep@*/ exprNode t, /*@keep@*/ exprNode b) | |
6872 | { | |
6873 | exprNode ret; | |
6874 | bool emptyErr = FALSE; | |
616915dd | 6875 | |
6876 | if (context_maybeSet (FLG_WHILEEMPTY)) | |
6877 | { | |
6878 | if (exprNode_isEmptyStatement (b)) | |
6879 | { | |
6880 | emptyErr = optgenerror | |
6881 | (FLG_WHILEEMPTY, | |
6882 | cstring_makeLiteral | |
6883 | ("Body of while statement is empty"), | |
6884 | exprNode_loc (b)); | |
6885 | } | |
6886 | } | |
6887 | ||
6888 | if (!emptyErr && context_maybeSet (FLG_WHILEBLOCK)) | |
6889 | { | |
6890 | if (exprNode_isDefined (b) | |
6891 | && !exprNode_isBlock (b)) | |
6892 | { | |
6893 | if (context_inIterDef () | |
6894 | && (b->kind == XPR_STMTLIST | |
6895 | || b->kind == XPR_TOK)) | |
6896 | { | |
6897 | ; /* no error */ | |
6898 | } | |
6899 | else | |
6900 | { | |
6901 | voptgenerror (FLG_WHILEBLOCK, | |
6902 | message | |
6903 | ("Body of while statement is not a block: %s", | |
6904 | exprNode_unparse (b)), | |
6905 | exprNode_loc (b)); | |
6906 | } | |
6907 | } | |
6908 | } | |
6909 | ||
6910 | if (exprNode_isError (t)) | |
6911 | { | |
6912 | if (exprNode_isError (b)) | |
6913 | { | |
6914 | ret = exprNode_createLoc (ctype_unknown, g_currentloc); | |
6915 | } | |
6916 | else | |
6917 | { | |
6918 | ret = exprNode_createPartialCopy (b); | |
6919 | } | |
6920 | } | |
6921 | else | |
6922 | { | |
6923 | exprNode test; | |
6924 | ||
6925 | ret = exprNode_createPartialCopy (t); | |
6926 | ||
6927 | llassert (t->kind == XPR_WHILEPRED); | |
6928 | ||
6929 | test = exprData_getSingle (t->edata); | |
6930 | ||
6931 | if (!exprNode_isError (b) && exprNode_isDefined (test)) | |
6932 | { | |
6933 | if (context_maybeSet (FLG_INFLOOPS) | |
6934 | || context_maybeSet (FLG_INFLOOPSUNCON)) | |
6935 | { | |
6936 | /* | |
6937 | ** check that some variable in the predicate is set by the body | |
6938 | ** if the predicate uses any variables | |
6939 | */ | |
6940 | ||
6941 | checkInfiniteLoop (test, b); | |
6942 | } | |
6943 | ||
6944 | exprNode_mergeUSs (ret, b); | |
6945 | ||
6946 | if (exprNode_isDefined (b)) | |
6947 | { | |
6948 | ret->exitCode = exitkind_makeConditional (b->exitCode); | |
6949 | } | |
6950 | } | |
6951 | } | |
6952 | ||
6953 | ret->edata = exprData_makePair (t, b); | |
6954 | ret->kind = XPR_WHILE; | |
6955 | ||
6956 | if (exprNode_isDefined (t) && exprNode_mustEscape (t)) | |
6957 | { | |
6958 | voptgenerror | |
6959 | (FLG_CONTROL, | |
6960 | message ("Predicate always exits: %s", exprNode_unparse (t)), | |
6961 | exprNode_loc (t)); | |
6962 | } | |
6963 | ||
6964 | ret->exitCode = XK_NEVERESCAPE; | |
6965 | ||
6966 | /* | |
6967 | ** If loop is infinite, and there is no break inside, | |
6968 | ** exit code is never reach. | |
6969 | */ | |
6970 | ||
6971 | if (exprNode_knownIntValue (t)) | |
6972 | { | |
6973 | if (!exprNode_isZero (t)) | |
6974 | { | |
6975 | if (exprNode_isDefined (b)) | |
6976 | { | |
6977 | if (!b->canBreak) | |
6978 | { | |
6979 | /* Really, it means never reached. */ | |
6980 | ret->exitCode = XK_MUSTEXIT; | |
6981 | } | |
6982 | } | |
6983 | } | |
6984 | } | |
6985 | else | |
6986 | { | |
6987 | ; | |
6988 | } | |
6989 | ||
6990 | ret->canBreak = FALSE; | |
6991 | ret->mustBreak = FALSE; | |
6992 | ||
6993 | return ret; | |
6994 | } | |
6995 | ||
6996 | /* | |
6997 | ** do { b } while (t); | |
6998 | ** | |
6999 | ** note: body passed as first argument | |
7000 | */ | |
7001 | ||
7002 | exprNode exprNode_doWhile (/*@only@*/ exprNode b, /*@only@*/ exprNode t) | |
7003 | { | |
7004 | exprNode ret; | |
7005 | ||
7006 | if (exprNode_isError (t)) | |
7007 | { | |
7008 | if (exprNode_isError (b)) | |
7009 | { | |
7010 | ret = exprNode_createLoc (ctype_unknown, g_currentloc); | |
7011 | } | |
7012 | else | |
7013 | { | |
7014 | ret = exprNode_createPartialCopy (b); | |
7015 | ||
7016 | ret->exitCode = exitkind_makeConditional (b->exitCode); | |
7017 | exprNode_checkUse (ret, b->sref, b->loc); | |
7018 | ret->exitCode = b->exitCode; | |
7019 | ret->canBreak = b->canBreak; | |
7020 | ret->mustBreak = b->mustBreak; | |
7021 | } | |
7022 | } | |
7023 | else | |
7024 | { | |
7025 | ret = exprNode_createPartialCopy (t); | |
7026 | exprNode_checkPred (cstring_makeLiteralTemp ("while"), t); | |
7027 | ||
7028 | if (!exprNode_isError (b)) | |
7029 | { | |
7030 | /* | |
7031 | ** forgot the copy's --- why wasn't this detected?? | |
7032 | */ | |
7033 | ||
28bf4b0b | 7034 | ret->sets = sRefSet_copyInto (ret->sets, b->sets); |
7035 | ret->msets = sRefSet_copyInto (ret->msets, b->msets); | |
7036 | ret->uses = sRefSet_copyInto (ret->uses, b->uses); | |
616915dd | 7037 | |
7038 | /* left this out --- causes and aliasing bug (infinite loop) | |
7039 | should be detected?? */ | |
7040 | ||
7041 | exprNode_checkUse (ret, b->sref, b->loc); | |
7042 | exprNode_mergeUSs (ret, t); | |
7043 | exprNode_checkUse (ret, t->sref, t->loc); | |
7044 | ||
7045 | ret->exitCode = b->exitCode; | |
7046 | ret->canBreak = b->canBreak; | |
7047 | ret->mustBreak = b->mustBreak; | |
7048 | } | |
7049 | } | |
7050 | ||
7051 | context_exitDoWhileClause (t); | |
7052 | ||
7053 | ret->kind = XPR_DOWHILE; | |
7054 | ret->edata = exprData_makePair (t, b); | |
7055 | return ret; | |
7056 | } | |
7057 | ||
7058 | exprNode exprNode_for (/*@keep@*/ exprNode inc, /*@keep@*/ exprNode body) | |
7059 | { | |
7060 | exprNode ret; | |
7061 | bool emptyErr = FALSE; | |
7062 | ||
7063 | if (context_maybeSet (FLG_FOREMPTY)) | |
7064 | { | |
7065 | if (exprNode_isEmptyStatement (body)) | |
7066 | { | |
7067 | emptyErr = optgenerror | |
7068 | (FLG_FOREMPTY, | |
7069 | cstring_makeLiteral | |
7070 | ("Body of for statement is empty"), | |
7071 | exprNode_loc (body)); | |
7072 | } | |
7073 | } | |
7074 | ||
7075 | if (!emptyErr && context_maybeSet (FLG_FORBLOCK)) | |
7076 | { | |
7077 | if (exprNode_isDefined (body) | |
7078 | && !exprNode_isBlock (body)) | |
7079 | { | |
7080 | if (context_inIterDef () | |
7081 | && (body->kind == XPR_STMTLIST | |
7082 | || body->kind == XPR_TOK)) | |
7083 | { | |
7084 | ; /* no error */ | |
7085 | } | |
7086 | else | |
7087 | { | |
7088 | voptgenerror (FLG_FORBLOCK, | |
7089 | message | |
7090 | ("Body of for statement is not a block: %s", | |
7091 | exprNode_unparse (body)), | |
7092 | exprNode_loc (body)); | |
7093 | } | |
7094 | } | |
7095 | } | |
7096 | ||
7097 | /* | |
7098 | ** for ud purposes: (alreadly) init -> test -> (now) LOOP: body + inc + test | |
7099 | */ | |
7100 | ||
7101 | if (exprNode_isError (body)) | |
7102 | { | |
7103 | ret = exprNode_createPartialCopy (inc); | |
7104 | } | |
7105 | else | |
7106 | { | |
7107 | ret = exprNode_createPartialCopy (body); | |
7108 | ||
7109 | ret->exitCode = exitkind_makeConditional (body->exitCode); | |
7110 | ||
7111 | exprNode_mergeUSs (inc, body); | |
7112 | ||
7113 | if (exprNode_isDefined (inc)) | |
7114 | { | |
7115 | exprNode tmp; | |
7116 | ||
7117 | context_setMessageAnnote (cstring_makeLiteral ("in post loop increment")); | |
7118 | ||
7119 | ||
7120 | tmp = exprNode_effect (exprData_getTripleInc (inc->edata)); | |
7121 | exprNode_freeShallow (tmp); | |
7122 | ||
7123 | context_clearMessageAnnote (); | |
7124 | context_setMessageAnnote (cstring_makeLiteral ("in post loop test")); | |
7125 | ||
7126 | tmp = exprNode_effect (exprData_getTripleTest (inc->edata)); | |
7127 | exprNode_freeShallow (tmp); | |
7128 | ||
7129 | context_clearMessageAnnote (); | |
7130 | ||
28bf4b0b | 7131 | ret->uses = sRefSet_copyInto (ret->uses, inc->uses); |
7132 | ret->sets = sRefSet_copyInto (ret->sets, inc->sets); | |
7133 | ret->msets = sRefSet_copyInto (ret->msets, inc->msets); | |
616915dd | 7134 | } |
7135 | } | |
7136 | ||
7137 | ret->kind = XPR_FOR; | |
7138 | ret->edata = exprData_makePair (inc, body); | |
7139 | ||
7140 | if (exprNode_isDefined (inc)) { | |
7141 | exprNode test = exprData_getTripleTest (inc->edata); | |
7142 | ||
7143 | if (exprNode_isUndefined (test)) { | |
7144 | if (exprNode_isDefined (body)) { | |
7145 | if (!body->canBreak) { | |
7146 | /* Really, it means never reached. */ | |
7147 | ret->exitCode = XK_MUSTEXIT; | |
7148 | } | |
7149 | } | |
7150 | } | |
7151 | } | |
7152 | ||
7153 | return (ret); | |
7154 | } | |
7155 | ||
7156 | /* | |
7157 | ** for (init; test; inc) | |
7158 | ** ==> | |
7159 | ** init; | |
7160 | ** while (test) { body; inc; } | |
7161 | ** | |
7162 | ** Now: check use of init (may set vars for test) | |
7163 | ** check use of test | |
7164 | ** no checks on inc | |
7165 | _*/ | |
7166 | ||
7167 | /*@observer@*/ guardSet exprNode_getForGuards (exprNode pred) | |
7168 | { | |
7169 | exprNode test; | |
7170 | ||
7171 | if (exprNode_isError (pred)) return guardSet_undefined; | |
7172 | ||
7173 | llassert (pred->kind == XPR_FORPRED); | |
7174 | ||
7175 | test = exprData_getTripleTest (pred->edata); | |
7176 | ||
7177 | if (!exprNode_isError (test)) | |
7178 | { | |
7179 | return (test->guards); | |
7180 | } | |
7181 | ||
7182 | return guardSet_undefined; | |
7183 | } | |
7184 | ||
7185 | exprNode exprNode_whilePred (/*@only@*/ exprNode test) | |
7186 | { | |
7187 | exprNode ret = exprNode_createSemiCopy (test); | |
7188 | ||
7189 | if (exprNode_isDefined (test)) | |
7190 | { | |
7191 | exprNode_copySets (ret, test); | |
7192 | exprNode_checkPred (cstring_makeLiteralTemp ("while"), test); | |
7193 | exprNode_checkUse (ret, test->sref, test->loc); | |
7194 | ||
7195 | exprNode_produceGuards (test); | |
7196 | ||
7197 | ret->guards = guardSet_copy (test->guards); | |
7198 | } | |
7199 | ||
7200 | ret->edata = exprData_makeSingle (test); | |
7201 | ret->kind = XPR_WHILEPRED; | |
7202 | return ret; | |
7203 | } | |
7204 | ||
7205 | exprNode exprNode_forPred (/*@only@*/ exprNode init, /*@only@*/ exprNode test, | |
7206 | /*@only@*/ exprNode inc) | |
7207 | { | |
7208 | exprNode ret; | |
7209 | ||
7210 | /* | |
7211 | ** for ud purposes: init -> test -> LOOP: [ body, inc ] | |
7212 | */ | |
7213 | ||
7214 | exprNode_checkPred (cstring_makeLiteralTemp ("for"), test); | |
7215 | ||
7216 | if (!exprNode_isError (inc)) | |
7217 | { | |
7218 | ret = exprNode_createPartialCopy (inc); | |
7219 | } | |
7220 | else | |
7221 | { | |
7222 | if (!exprNode_isError (init)) | |
7223 | { | |
7224 | ret = exprNode_createPartialCopy (init); | |
7225 | } | |
7226 | else if (!exprNode_isError (test)) | |
7227 | { | |
7228 | ret = exprNode_createPartialCopy (test); | |
7229 | } | |
7230 | else | |
7231 | { | |
7232 | ret = exprNode_createUnknown (); | |
7233 | } | |
7234 | } | |
7235 | ||
7236 | exprNode_mergeUSs (ret, init); | |
7237 | ||
7238 | if (exprNode_isDefined (init)) | |
7239 | { | |
7240 | exprNode_checkUse (ret, init->sref, init->loc); | |
7241 | } | |
7242 | ||
7243 | exprNode_mergeUSs (ret, test); | |
7244 | ||
7245 | if (exprNode_isDefined (test)) | |
7246 | { | |
7247 | exprNode_checkUse (ret, test->sref, test->loc); | |
7248 | } | |
7249 | ||
7250 | ret->kind = XPR_FORPRED; | |
7251 | ret->edata = exprData_makeFor (init, test, inc); | |
7252 | return (ret); | |
7253 | } | |
7254 | ||
7255 | /*@notnull@*/ /*@only@*/ exprNode exprNode_goto (/*@only@*/ cstring label) | |
7256 | { | |
7257 | exprNode ret = exprNode_createUnknown (); | |
7258 | ||
7259 | if (context_inMacro ()) | |
7260 | { | |
7261 | voptgenerror (FLG_MACROSTMT, | |
7262 | message ("Macro %s uses goto (not functional)", | |
7263 | context_inFunctionName ()), | |
7264 | g_currentloc); | |
7265 | } | |
7266 | ||
7267 | ret->kind = XPR_GOTO; | |
7268 | ret->edata = exprData_makeLiteral (label); | |
7269 | ret->mustBreak = TRUE; | |
7270 | ret->exitCode = XK_GOTO; | |
7271 | ret->canBreak = TRUE; | |
7272 | return ret; | |
7273 | } | |
7274 | ||
7275 | exprNode exprNode_continue (/*@only@*/ lltok l, int qcontinue) | |
7276 | { | |
7277 | exprNode ret = exprNode_createLoc (ctype_unknown, fileloc_copy (lltok_getLoc (l))); | |
7278 | ||
7279 | ret->kind = XPR_CONTINUE; | |
7280 | ret->edata = exprData_makeTok (l); | |
7281 | ret->canBreak = TRUE; | |
7282 | ret->mustBreak = TRUE; | |
7283 | ||
7284 | if (qcontinue == QSAFEBREAK) | |
7285 | { | |
7286 | ; /* no checking */ | |
7287 | } | |
7288 | else if (qcontinue == QINNERCONTINUE) | |
7289 | { | |
7290 | if (!context_inDeepLoop ()) | |
7291 | { | |
7292 | voptgenerror | |
7293 | (FLG_LOOPLOOPCONTINUE, | |
7294 | cstring_makeLiteral ("Continue statement marked with innercontinue " | |
7295 | "is not inside a nested loop"), | |
7296 | exprNode_loc (ret)); | |
7297 | } | |
7298 | } | |
7299 | else if (qcontinue == BADTOK) | |
7300 | { | |
7301 | if (context_inDeepLoop ()) | |
7302 | { | |
7303 | voptgenerror | |
7304 | (FLG_LOOPLOOPCONTINUE, | |
7305 | cstring_makeLiteral ("Continue statement in nested loop"), | |
7306 | exprNode_loc (ret)); | |
7307 | } | |
7308 | } | |
7309 | else | |
7310 | { | |
7311 | llbuglit ("exprNode_continue: bad qcontinue"); | |
7312 | } | |
7313 | ||
7314 | return ret; | |
7315 | } | |
7316 | ||
7317 | exprNode exprNode_break (/*@only@*/ lltok l, int bqual) | |
7318 | { | |
7319 | exprNode ret = exprNode_createLoc (ctype_unknown, fileloc_copy (lltok_getLoc (l))); | |
7320 | clause breakClause = context_breakClause (); | |
7321 | ||
7322 | ret->kind = XPR_BREAK; | |
7323 | ret->edata = exprData_makeTok (l); | |
7324 | ret->canBreak = TRUE; | |
7325 | ret->mustBreak = TRUE; | |
7326 | ||
7327 | if (breakClause == NOCLAUSE) | |
7328 | { | |
7329 | voptgenerror | |
7330 | (FLG_SYNTAX, | |
7331 | cstring_makeLiteral ("Break not inside while, for or switch statement"), | |
7332 | exprNode_loc (ret)); | |
7333 | } | |
7334 | else | |
7335 | { | |
7336 | if (bqual != BADTOK) | |
7337 | { | |
7338 | switch (bqual) | |
7339 | { | |
7340 | case QSAFEBREAK: | |
7341 | break; | |
7342 | case QINNERBREAK: | |
7343 | if (breakClause == SWITCHCLAUSE) | |
7344 | { | |
7345 | if (!context_inDeepSwitch ()) | |
7346 | { | |
7347 | voptgenerror (FLG_SYNTAX, | |
7348 | cstring_makeLiteral | |
7349 | ("Break preceded by innerbreak is not in a deep switch"), | |
7350 | exprNode_loc (ret)); | |
7351 | } | |
7352 | } | |
7353 | else | |
7354 | { | |
7355 | if (!context_inDeepLoop ()) | |
7356 | { | |
7357 | voptgenerror (FLG_SYNTAX, | |
7358 | cstring_makeLiteral | |
7359 | ("Break preceded by innerbreak is not in a deep loop"), | |
7360 | exprNode_loc (ret)); | |
7361 | } | |
7362 | } | |
7363 | break; | |
7364 | case QLOOPBREAK: | |
7365 | if (breakClause == SWITCHCLAUSE) | |
7366 | { | |
7367 | voptgenerror (FLG_SYNTAX, | |
7368 | cstring_makeLiteral | |
7369 | ("Break preceded by loopbreak is breaking a switch"), | |
7370 | exprNode_loc (ret)); | |
7371 | } | |
7372 | break; | |
7373 | case QSWITCHBREAK: | |
7374 | if (breakClause != SWITCHCLAUSE) | |
7375 | { | |
7376 | voptgenerror | |
7377 | (FLG_SYNTAX, | |
7378 | message ("Break preceded by switchbreak is breaking %s", | |
7379 | cstring_makeLiteralTemp | |
7380 | ((breakClause == WHILECLAUSE | |
7381 | || breakClause == DOWHILECLAUSE) ? "a while loop" | |
7382 | : (breakClause == FORCLAUSE) ? "a for loop" | |
7383 | : (breakClause == ITERCLAUSE) ? "an iterator" | |
7384 | : "<error loop>")), | |
7385 | exprNode_loc (ret)); | |
7386 | } | |
7387 | break; | |
7388 | BADDEFAULT; | |
7389 | } | |
7390 | } | |
7391 | else | |
7392 | { | |
7393 | if (breakClause == SWITCHCLAUSE) | |
7394 | { | |
7395 | clause nextBreakClause = context_nextBreakClause (); | |
7396 | ||
7397 | switch (nextBreakClause) | |
7398 | { | |
7399 | case NOCLAUSE: break; | |
7400 | case WHILECLAUSE: | |
7401 | case DOWHILECLAUSE: | |
7402 | case FORCLAUSE: | |
7403 | case ITERCLAUSE: | |
7404 | voptgenerror | |
7405 | (FLG_LOOPSWITCHBREAK, | |
7406 | cstring_makeLiteral ("Break statement in switch inside loop"), | |
7407 | exprNode_loc (ret)); | |
7408 | break; | |
7409 | case SWITCHCLAUSE: | |
7410 | voptgenerror | |
7411 | (FLG_SWITCHSWITCHBREAK, | |
7412 | cstring_makeLiteral ("Break statement in switch inside switch"), | |
7413 | exprNode_loc (ret)); | |
7414 | break; | |
7415 | BADDEFAULT; | |
7416 | } | |
7417 | } | |
7418 | else | |
7419 | { | |
7420 | if (context_inDeepLoop ()) | |
7421 | { | |
7422 | voptgenerror | |
7423 | (FLG_LOOPLOOPBREAK, | |
7424 | cstring_makeLiteral ("Break statement in nested loop"), | |
7425 | exprNode_loc (ret)); | |
7426 | } | |
7427 | else | |
7428 | { | |
7429 | if (context_inDeepLoopSwitch ()) | |
7430 | { | |
7431 | voptgenerror | |
7432 | (FLG_SWITCHLOOPBREAK, | |
7433 | cstring_makeLiteral ("Break statement in loop inside switch"), | |
7434 | exprNode_loc (ret)); | |
7435 | } | |
7436 | } | |
7437 | } | |
7438 | } | |
7439 | } | |
7440 | ||
7441 | return ret; | |
7442 | } | |
7443 | ||
7444 | exprNode exprNode_nullReturn (/*@only@*/ lltok t) | |
7445 | { | |
7446 | fileloc loc = lltok_getLoc (t); | |
7447 | exprNode ret = exprNode_createLoc (ctype_unknown, fileloc_copy (loc)); | |
7448 | ||
7449 | context_returnFunction (); | |
7450 | exprChecks_checkNullReturn (loc); | |
7451 | ||
7452 | ret->kind = XPR_NULLRETURN; | |
7453 | ret->edata = exprData_makeTok (t); | |
7454 | ret->exitCode = XK_MUSTRETURN; | |
7455 | return ret; | |
7456 | } | |
7457 | ||
7458 | exprNode exprNode_return (/*@only@*/ exprNode e) | |
7459 | { | |
7460 | exprNode ret; | |
7461 | ||
7462 | if (exprNode_isError (e)) | |
7463 | { | |
7464 | ret = exprNode_createUnknown (); | |
7465 | } | |
7466 | else | |
7467 | { | |
7468 | ret = exprNode_createLoc (ctype_unknown, fileloc_copy (e->loc)); | |
7469 | ||
7470 | exprNode_checkUse (ret, e->sref, e->loc); | |
7471 | exprNode_checkReturn (e); | |
7472 | } | |
7473 | ||
7474 | context_returnFunction (); | |
7475 | ret->kind = XPR_RETURN; | |
7476 | ret->edata = exprData_makeSingle (e); | |
7477 | ret->exitCode = XK_MUSTRETURN; | |
7478 | ||
7479 | return (ret); | |
7480 | } | |
7481 | ||
7482 | exprNode exprNode_comma (/*@only@*/ exprNode e1, /*@only@*/ exprNode e2) | |
7483 | { | |
7484 | exprNode ret; | |
7485 | ||
7486 | if (exprNode_isError (e1)) | |
7487 | { | |
7488 | if (exprNode_isError (e2)) | |
7489 | { | |
7490 | ret = exprNode_createLoc (ctype_unknown, g_currentloc); | |
7491 | } | |
7492 | else | |
7493 | { | |
7494 | ret = exprNode_createPartialCopy (e2); | |
7495 | exprNode_checkUse (ret, e2->sref, e2->loc); | |
7496 | ret->sref = e2->sref; | |
7497 | } | |
7498 | } | |
7499 | else | |
7500 | { | |
7501 | ret = exprNode_createPartialCopy (e1); | |
7502 | ||
7503 | exprNode_checkUse (ret, e1->sref, e1->loc); | |
7504 | ||
7505 | if (!exprNode_isError (e2)) | |
7506 | { | |
7507 | exprNode_mergeUSs (ret, e2); | |
7508 | exprNode_checkUse (ret, e2->sref, e2->loc); | |
7509 | ret->sref = e2->sref; | |
7510 | } | |
7511 | } | |
7512 | ||
7513 | ret->kind = XPR_COMMA; | |
7514 | ret->edata = exprData_makePair (e1, e2); | |
7515 | ||
7516 | if (exprNode_isDefined (e1)) | |
7517 | { | |
7518 | if (exprNode_isDefined (e2)) | |
7519 | { | |
7520 | ret->typ = e2->typ; | |
7521 | ||
7522 | if (exprNode_mustEscape (e1) || e1->mustBreak) | |
7523 | { | |
7524 | voptgenerror | |
7525 | (FLG_UNREACHABLE, | |
7526 | message ("Second clause of comma expression is unreachable: %s", | |
7527 | exprNode_unparse (e2)), | |
7528 | exprNode_loc (e2)); | |
7529 | } | |
7530 | ||
7531 | ret->exitCode = exitkind_combine (e1->exitCode, e2->exitCode); | |
7532 | ret->mustBreak = e1->mustBreak || e2->mustBreak; | |
7533 | ret->canBreak = e1->canBreak || e2->canBreak; | |
7534 | } | |
7535 | else | |
7536 | { | |
7537 | if (exprNode_mustEscape (e1) || e1->mustBreak) | |
7538 | { | |
7539 | voptgenerror | |
7540 | (FLG_UNREACHABLE, | |
7541 | message ("Second clause of comma expression is unreachable: %s", | |
7542 | exprNode_unparse (e2)), | |
7543 | exprNode_loc (e2)); | |
7544 | } | |
7545 | ||
7546 | ret->exitCode = e1->exitCode; | |
7547 | ret->canBreak = e1->canBreak; | |
7548 | } | |
7549 | } | |
7550 | else | |
7551 | { | |
7552 | if (exprNode_isDefined (e2)) | |
7553 | { | |
7554 | ret->exitCode = e2->exitCode; | |
7555 | ret->mustBreak = e2->mustBreak; | |
7556 | ret->canBreak = e2->canBreak; | |
7557 | } | |
7558 | } | |
7559 | ||
7560 | return (ret); | |
7561 | } | |
7562 | ||
7563 | static bool exprNode_checkOneInit (/*@notnull@*/ exprNode el, exprNode val) | |
7564 | { | |
7565 | ctype t1 = exprNode_getType (el); | |
7566 | ctype t2 = exprNode_getType (val); | |
7567 | bool hasError = FALSE; | |
7568 | ||
7569 | if (ctype_isUnknown (t1)) | |
7570 | { | |
7571 | voptgenerror (FLG_IMPTYPE, | |
7572 | message ("Variable has unknown (implicitly int) type: %s", | |
7573 | exprNode_unparse (el)), | |
7574 | el->loc); | |
7575 | ||
7576 | t1 = ctype_int; | |
7577 | el->typ = ctype_int; | |
7578 | } | |
7579 | ||
7580 | if (exprNode_isDefined (val) && val->kind == XPR_INITBLOCK) | |
7581 | { | |
7582 | exprNodeList vals = exprData_getArgs (val->edata); | |
7583 | ||
7584 | if (ctype_isRealAP (t1)) | |
7585 | { | |
7586 | int i = 0; | |
7587 | int nerrors = 0; | |
7588 | ||
b072092f | 7589 | /*@i423 check number of entries int a[3] = { 1, 2, 3, 4 } ; */ |
7590 | ||
616915dd | 7591 | exprNodeList_elements (vals, oneval) |
7592 | { | |
7593 | cstring istring = message ("%d", i); | |
7594 | exprNode newel = | |
7595 | exprNode_arrayFetch | |
7596 | (exprNode_fakeCopy (el), | |
7597 | exprNode_numLiteral (ctype_int, istring, | |
7598 | fileloc_copy (el->loc), i)); | |
7599 | ||
7600 | if (exprNode_isDefined (newel)) | |
7601 | { | |
7602 | if (exprNodeList_size (vals) == 1 | |
7603 | && ctype_isString (exprNode_getType (oneval)) | |
7604 | && ctype_isChar (exprNode_getType (newel))) | |
7605 | { | |
7606 | exprNode_freeIniter (newel); | |
7607 | } | |
7608 | else | |
7609 | { | |
7610 | if (exprNode_checkOneInit (newel, oneval)) | |
7611 | { | |
7612 | hasError = TRUE; | |
7613 | nerrors++; | |
7614 | ||
7615 | if (nerrors > 3 && exprNodeList_size (vals) > 6) | |
7616 | { | |
7617 | llgenmsg | |
7618 | (message ("Additional initialization errors " | |
7619 | "for %s not reported", | |
7620 | exprNode_unparse (el)), | |
7621 | exprNode_loc (el)); | |
7622 | exprNode_freeIniter (newel); | |
7623 | break; | |
7624 | } | |
7625 | else | |
7626 | { | |
7627 | exprNode_freeIniter (newel); | |
7628 | } | |
7629 | } | |
7630 | else | |
7631 | { | |
7632 | exprNode_freeIniter (newel); | |
7633 | } | |
7634 | } | |
7635 | } | |
7636 | ||
7637 | cstring_free (istring); | |
7638 | i++; | |
7639 | /*@-branchstate@*/ | |
7640 | } end_exprNodeList_elements; | |
7641 | /*@=branchstate@*/ | |
7642 | } | |
7643 | else if (ctype_isStruct (ctype_realType (t1))) | |
7644 | { | |
7645 | uentryList fields = ctype_getFields (t1); | |
7646 | int i = 0; | |
7647 | ||
7648 | if (uentryList_size (fields) != exprNodeList_size (vals)) | |
7649 | { | |
7650 | if (uentryList_size (fields) > exprNodeList_size (vals)) | |
7651 | { | |
7652 | hasError = optgenerror | |
7653 | (FLG_FULLINITBLOCK, | |
7654 | message ("Initializer block for " | |
28bf4b0b | 7655 | "%s has %d field%&, but %s has %d field%&: %q", |
616915dd | 7656 | exprNode_unparse (el), |
7657 | exprNodeList_size (vals), | |
7658 | ctype_unparse (t1), | |
7659 | uentryList_size (fields), | |
7660 | exprNodeList_unparse (vals)), | |
7661 | val->loc); | |
7662 | } | |
7663 | else | |
7664 | { | |
7665 | hasError = optgenerror | |
7666 | (FLG_TYPE, | |
7667 | message ("Initializer block for " | |
28bf4b0b | 7668 | "%s has %d field%&, but %s has %d field%&: %q", |
616915dd | 7669 | exprNode_unparse (el), |
7670 | exprNodeList_size (vals), | |
7671 | ctype_unparse (t1), | |
7672 | uentryList_size (fields), | |
7673 | exprNodeList_unparse (vals)), | |
7674 | val->loc); | |
7675 | } | |
7676 | } | |
7677 | else | |
7678 | { | |
7679 | exprNodeList_elements (vals, oneval) | |
7680 | { | |
7681 | uentry thisfield = uentryList_getN (fields, i); | |
7682 | exprNode newel = | |
28bf4b0b | 7683 | exprNode_fieldAccessAux (exprNode_fakeCopy (el), |
7684 | exprNode_loc (el), | |
7685 | uentry_getName (thisfield)); | |
616915dd | 7686 | |
7687 | if (exprNode_isDefined (newel)) | |
7688 | { | |
7689 | if (exprNode_checkOneInit (newel, oneval)) | |
7690 | { | |
7691 | hasError = TRUE; | |
7692 | } | |
7693 | ||
7694 | exprNode_freeIniter (newel); | |
7695 | } | |
7696 | ||
7697 | i++; | |
7698 | } end_exprNodeList_elements; | |
7699 | } | |
7700 | } | |
7701 | else | |
7702 | { | |
7703 | hasError = optgenerror | |
7704 | (FLG_TYPE, | |
7705 | message ("Initializer block used for " | |
7706 | "%s where %t is expected: %s", | |
7707 | exprNode_unparse (el), t1, exprNode_unparse (val)), | |
7708 | val->loc); | |
7709 | } | |
7710 | } | |
7711 | else | |
7712 | { | |
7713 | if (exprNode_isDefined (val)) | |
7714 | { | |
7715 | doAssign (el, val, TRUE); | |
7716 | ||
7717 | if (!exprNode_matchType (t1, val)) | |
7718 | { | |
7719 | hasError = gentypeerror | |
7720 | (t1, val, t2, el, | |
7721 | message ("Initial value of %s is type %t, " | |
7722 | "expects %t: %s", | |
7723 | exprNode_unparse (el), | |
7724 | t2, t1, exprNode_unparse (val)), | |
7725 | val->loc); | |
7726 | } | |
7727 | } | |
7728 | } | |
7729 | ||
7730 | return hasError; | |
7731 | } | |
7732 | ||
28bf4b0b | 7733 | static exprNode |
7734 | exprNode_makeInitializationAux (/*@temp@*/ idDecl t) | |
7735 | { | |
7736 | exprNode ret; | |
7737 | ||
7738 | if (usymtab_exists (idDecl_observeId (t))) | |
7739 | { | |
7740 | uentry ue = usymtab_lookup (idDecl_observeId (t)); | |
7741 | ret = exprNode_createId (ue); | |
7742 | ||
7743 | /*@i723 don't do this...but why? */ | |
7744 | # if 0 | |
7745 | ct = ctype_realishType (ret->typ); | |
7746 | ||
7747 | DPRINTF (("Type: %s", ctype_unparse (ret->typ))); | |
7748 | ||
7749 | if (ctype_isUnknown (ct)) | |
7750 | { | |
7751 | if (uentry_isAnyTag (ue)) | |
7752 | { | |
7753 | voptgenerror | |
7754 | (FLG_IMPTYPE, | |
7755 | message ("%s used but not previously declared: %s", | |
7756 | uentry_ekindName (ue), | |
7757 | idDecl_getName (t)), | |
7758 | g_currentloc); | |
7759 | ||
7760 | } | |
7761 | else | |
7762 | { | |
7763 | voptgenerror | |
7764 | (FLG_IMPTYPE, | |
7765 | message ("Variable has unknown (implicitly int) type: %s", | |
7766 | idDecl_getName (t)), | |
7767 | g_currentloc); | |
7768 | } | |
7769 | ||
7770 | ct = ctype_int; | |
7771 | } | |
7772 | # endif | |
7773 | } | |
7774 | else | |
7775 | { | |
7776 | uentry ue = uentry_makeUnrecognized (idDecl_observeId (t), | |
7777 | g_currentloc); | |
7778 | ret = exprNode_fromIdentifierAux (ue); | |
7779 | ||
7780 | /* | |
7781 | ** No error - this happens in old style declarations: | |
7782 | ||
7783 | voptgenerror | |
7784 | (FLG_UNRECOG, | |
7785 | message ("Unrecognized identifier in intializer: %s", idDecl_observeId (t)), | |
7786 | g_currentloc); | |
7787 | ||
7788 | ** | |
7789 | */ | |
7790 | } | |
7791 | ||
7792 | exprData_free (ret->edata, ret->kind); | |
7793 | ret->edata = exprData_undefined; | |
7794 | ret->exitCode = XK_NEVERESCAPE; | |
7795 | ret->mustBreak = FALSE; | |
7796 | ret->kind = XPR_INIT; | |
7797 | return ret; | |
7798 | } | |
7799 | ||
7800 | exprNode exprNode_makeEmptyInitialization (/*@only@*/ idDecl t) | |
7801 | { | |
7802 | exprNode ret = exprNode_makeInitializationAux (t); | |
7803 | llassert (ret->edata == exprData_undefined); | |
7804 | ret->edata = exprData_makeInit (t, exprNode_undefined); | |
7805 | return ret; | |
7806 | } | |
7807 | ||
616915dd | 7808 | exprNode exprNode_makeInitialization (/*@only@*/ idDecl t, |
7809 | /*@only@*/ exprNode e) | |
7810 | { | |
7811 | uentry ue = usymtab_lookup (idDecl_observeId (t)); | |
28bf4b0b | 7812 | exprNode ret = exprNode_makeInitializationAux (t); |
7813 | fileloc loc = exprNode_loc (e); | |
b072092f | 7814 | |
616915dd | 7815 | if (exprNode_isError (e)) |
7816 | { | |
7817 | e = exprNode_createUnknown (); | |
28bf4b0b | 7818 | idDecl_free (t); |
616915dd | 7819 | |
7820 | /* error: assume initializer is defined */ | |
28bf4b0b | 7821 | sRef_setDefined (ret->sref, g_currentloc); |
616915dd | 7822 | } |
7823 | else | |
7824 | { | |
28bf4b0b | 7825 | ctype ct = ctype_realishType (ret->typ); |
7826 | ||
616915dd | 7827 | /* |
7828 | ** evs - 9 Apr 1995 | |
7829 | ** | |
7830 | ** was addSafeUse --- what's the problem? | |
7831 | ** | |
7832 | ** int x = 3, y = x ? | |
7833 | */ | |
7834 | ||
28bf4b0b | 7835 | exprData_free (ret->edata, ret->kind); |
7836 | ret->edata = exprData_makeInit (t, e); | |
7837 | ||
616915dd | 7838 | exprNode_checkUse (ret, e->sref, e->loc); |
7839 | ||
7840 | if (ctype_isUnknown (e->typ) && uentry_isValid (ue)) | |
7841 | { | |
7842 | exprNode lhs = exprNode_createId (ue); | |
7843 | ||
7844 | /* | |
7845 | ** static storage should be undefined before initializing | |
7846 | */ | |
7847 | ||
7848 | if (uentry_isStatic (ue)) | |
7849 | { | |
7850 | sRef_setDefState (lhs->sref, SS_PARTIAL, fileloc_undefined); | |
7851 | } | |
7852 | ||
7853 | (void) exprNode_checkOneInit (lhs, e); | |
7854 | ||
7855 | if (uentry_isStatic (ue)) | |
7856 | { | |
7857 | sRef_setDefState (lhs->sref, SS_DEFINED, fileloc_undefined); | |
7858 | } | |
7859 | ||
7860 | exprNode_free (lhs); | |
7861 | } | |
7862 | else | |
7863 | { | |
7864 | if (!exprNode_matchType (ct, e)) | |
7865 | { | |
7866 | if (exprNode_isZero (e) && ctype_isArrayPtr (ct)) | |
7867 | { | |
7868 | ; | |
7869 | } | |
7870 | else | |
7871 | { | |
7872 | (void) gentypeerror | |
7873 | (exprNode_getType (e), e, exprNode_getType (ret), ret, | |
7874 | message | |
28bf4b0b | 7875 | ("Variable %q initialized to type %t, expects %t: %s", |
7876 | uentry_getName (ue), exprNode_getType (e), | |
616915dd | 7877 | exprNode_getType (ret), |
7878 | exprNode_unparse (e)), | |
7879 | e->loc); | |
7880 | } | |
7881 | } | |
7882 | } | |
7883 | ||
7884 | if (uentry_isStatic (ue)) | |
7885 | { | |
7886 | sRef_setDefState (ret->sref, SS_PARTIAL, fileloc_undefined); | |
7887 | } | |
7888 | ||
7889 | doAssign (ret, e, TRUE); | |
7890 | ||
7891 | if (uentry_isStatic (ue)) | |
7892 | { | |
7893 | sRef_setDefState (ret->sref, SS_DEFINED, fileloc_undefined); | |
7894 | } | |
7895 | } | |
7896 | ||
7897 | if (context_inIterDef ()) | |
7898 | { | |
7899 | /* should check if it is yield */ | |
7900 | uentry_setUsed (ue, loc); | |
7901 | } | |
7902 | else | |
7903 | { | |
28bf4b0b | 7904 | ; |
616915dd | 7905 | } |
7906 | ||
616915dd | 7907 | exprNode_mergeUSs (ret, e); |
7908 | return ret; | |
7909 | } | |
7910 | ||
7911 | exprNode exprNode_iter (/*@observer@*/ uentry name, | |
7912 | /*@only@*/ exprNodeList alist, | |
7913 | /*@only@*/ exprNode body, | |
7914 | /*@observer@*/ uentry end) | |
7915 | { | |
7916 | exprNode ret; | |
7917 | cstring iname; | |
7918 | ||
7919 | llassert (uentry_isValid (name)); | |
7920 | ||
7921 | uentry_setUsed (name, exprNode_loc (body)); | |
7922 | ||
7923 | ret = exprNode_createPartialCopy (body); | |
7924 | iname = uentry_getName (name); | |
7925 | ||
7926 | if (uentry_isInvalid (end)) | |
7927 | { | |
7928 | llerror (FLG_ITER, | |
7929 | message ("Iter %s not balanced with end_%s", iname, iname)); | |
7930 | } | |
7931 | else | |
7932 | { | |
7933 | cstring ename = uentry_getName (end); | |
7934 | ||
7935 | if (!cstring_equalPrefix (ename, "end_")) | |
7936 | { | |
7937 | llerror (FLG_ITER, message ("Iter %s not balanced with end_%s: %s", | |
7938 | iname, iname, ename)); | |
7939 | } | |
7940 | else | |
7941 | { | |
7942 | if (!cstring_equal (iname, cstring_suffix (ename, 4))) | |
7943 | { | |
7944 | llerror (FLG_ITER, | |
7945 | message ("Iter %s not balanced with end_%s: %s", | |
7946 | iname, iname, ename)); | |
7947 | } | |
7948 | } | |
7949 | ||
7950 | cstring_free (ename); | |
7951 | } | |
7952 | ||
7953 | context_exitIterClause (body); | |
7954 | ||
7955 | ret->kind = XPR_ITER; | |
7956 | ret->edata = exprData_makeIter (name, alist, body, end); | |
7957 | ||
7958 | if (uentry_isIter (name)) | |
7959 | { | |
7960 | (void) checkArgsReal (name, body, | |
7961 | uentry_getParams (name), alist, TRUE, ret); | |
7962 | } | |
7963 | ||
7964 | cstring_free (iname); | |
7965 | ||
7966 | return ret; | |
7967 | } | |
7968 | ||
7969 | exprNode | |
7970 | exprNode_iterNewId (/*@only@*/ cstring s) | |
7971 | { | |
7972 | exprNode e = exprNode_new (); | |
7973 | uentry ue = uentryList_getN (uentry_getParams (getCurrentIter ()), iterParamNo ()); | |
7974 | ||
7975 | llassert (processingIterVars ()); | |
7976 | ||
7977 | e->loc = context_getSaveLocation (); | |
7978 | ||
7979 | if (fileloc_isUndefined (e->loc)) | |
7980 | { | |
7981 | fileloc_free (e->loc); | |
7982 | e->loc = fileloc_copy (g_currentloc); | |
7983 | } | |
7984 | ||
7985 | e->uses = sRefSet_new (); | |
7986 | e->sets = sRefSet_new (); | |
7987 | e->msets = sRefSet_new (); | |
7988 | e->kind = XPR_VAR; | |
7989 | e->val = multiVal_unknown (); | |
7990 | e->guards = guardSet_new (); | |
7991 | e->sref = defref; | |
7992 | e->isJumpPoint = FALSE; | |
7993 | e->exitCode = XK_NEVERESCAPE; | |
7994 | ||
7995 | /*> missing fields, detected by lclint <*/ | |
7996 | e->canBreak = FALSE; | |
7997 | e->mustBreak = FALSE; | |
7998 | e->etext = cstring_undefined; | |
7999 | ||
8000 | if (uentry_isYield (ue)) | |
8001 | { | |
8002 | uentry uue = uentry_makeVariable (s, uentry_getType (ue), | |
8003 | fileloc_copy (e->loc), | |
8004 | FALSE); | |
8005 | sRef sr; | |
8006 | ||
8007 | uue = usymtab_supEntrySrefReturn (uue); | |
8008 | ||
8009 | sr = uentry_getSref (uue); | |
8010 | sRef_mergeStateQuiet (sr, uentry_getSref (ue)); | |
8011 | sr = uentry_getSref (uue); | |
8012 | sRef_setDefined (sr, e->loc); | |
8013 | ||
8014 | e->typ = uentry_getType (uue); | |
8015 | e->sref = sr; | |
8016 | e->edata = exprData_makeId (uue); | |
8017 | uentry_setUsed (uue, g_currentloc); | |
8018 | } | |
8019 | else | |
8020 | { | |
8021 | uentry uue; | |
8022 | ||
8023 | sRef_setGlobalScope (); | |
8024 | uue = uentry_makeVariableLoc (s, ctype_unknown); | |
8025 | ||
8026 | e->typ = ctype_unknown; | |
8027 | e->edata = exprData_makeId (uue); | |
8028 | ||
8029 | uentry_setUsed (uue, e->loc); | |
8030 | uentry_setHasNameError (uue); | |
8031 | ||
8032 | if (context_getFlag (FLG_REPEATUNRECOG)) | |
8033 | { | |
8034 | uentry_markOwned (uue); | |
8035 | } | |
8036 | else | |
8037 | { | |
8038 | usymtab_supGlobalEntry (uue); | |
8039 | } | |
8040 | ||
8041 | sRef_clearGlobalScope (); | |
8042 | ||
8043 | voptgenerror (FLG_UNRECOG, message ("Unrecognized identifier: %s", s), | |
8044 | e->loc); | |
8045 | } | |
8046 | ||
8047 | ||
8048 | cstring_free (s); | |
84c9ffbf | 8049 | |
8050 | exprNode_defineConstraints(e); | |
616915dd | 8051 | return (e); |
8052 | } | |
8053 | ||
8054 | exprNode | |
8055 | exprNode_iterExpr (/*@returned@*/ exprNode e) | |
8056 | { | |
8057 | if (!processingIterVars ()) | |
8058 | { | |
8059 | llcontbuglit ("checkIterParam: not in iter"); | |
8060 | return e; | |
8061 | } | |
8062 | ||
8063 | if (uentry_isYield (uentryList_getN (uentry_getParams (getCurrentIter ()), | |
8064 | iterParamNo ()))) | |
8065 | { | |
8066 | if (exprNode_isDefined (e)) | |
8067 | { | |
8068 | if (fileloc_isDefined (e->loc)) | |
8069 | { | |
8070 | voptgenerror | |
8071 | (FLG_ITER, | |
8072 | message ("Yield parameter is not simple identifier: %s", | |
8073 | exprNode_unparse (e)), | |
8074 | e->loc); | |
8075 | } | |
8076 | else | |
8077 | { | |
8078 | voptgenerror | |
8079 | (FLG_ITER, | |
8080 | message ("Yield parameter is not simple identifier: %s", | |
8081 | exprNode_unparse (e)), | |
8082 | g_currentloc); | |
8083 | ||
8084 | } | |
8085 | } | |
8086 | } | |
8087 | return e; | |
8088 | } | |
8089 | ||
8090 | exprNode | |
8091 | exprNode_iterId (/*@observer@*/ uentry c) | |
8092 | { | |
8093 | uentry ue; | |
8094 | ||
8095 | llassert (processingIterVars ()); | |
8096 | ||
8097 | ue = uentryList_getN (uentry_getParams (getCurrentIter ()), | |
8098 | iterParamNo ()); | |
8099 | ||
8100 | if (uentry_isYield (ue)) | |
8101 | { | |
8102 | ctype ct = uentry_getType (ue); | |
8103 | exprNode e = exprNode_createPlain (ct); | |
8104 | cstring name = uentry_getName (c); | |
8105 | uentry le = uentry_makeVariable (name, ct, fileloc_undefined, FALSE); | |
8106 | ||
8107 | uentry_setUsed (ue, g_currentloc); | |
8108 | uentry_setHasNameError (ue); | |
8109 | ||
8110 | cstring_free (name); | |
8111 | ||
8112 | e->kind = XPR_VAR; | |
8113 | e->edata = exprData_makeId (le); | |
8114 | e->loc = context_getSaveLocation (); | |
8115 | e->sref = uentry_getSref (le); | |
8116 | ||
8117 | usymtab_supEntrySref (le); | |
8118 | ||
8119 | if (!context_inHeader ()) | |
8120 | { | |
8121 | if (optgenerror | |
8122 | (FLG_ITER, | |
8123 | message ("Yield parameter shadows local declaration: %q", | |
8124 | uentry_getName (c)), | |
8125 | fileloc_isDefined (e->loc) ? e->loc : g_currentloc)) | |
8126 | { | |
8127 | uentry_showWhereDeclared (c); | |
8128 | } | |
8129 | } | |
8130 | ||
8131 | return e; | |
8132 | } | |
8133 | ||
8134 | return (exprNode_fromIdentifierAux (c)); | |
8135 | } | |
8136 | ||
8137 | exprNode exprNode_iterStart (/*@observer@*/ uentry name, /*@only@*/ exprNodeList alist) | |
8138 | { | |
8139 | exprNode ret = exprNode_create (ctype_unknown); | |
8140 | ||
8141 | ret->kind = XPR_ITERCALL; | |
8142 | ret->edata = exprData_makeIterCall (name, alist); | |
8143 | ||
8144 | if (uentry_isIter (name)) | |
8145 | { | |
8146 | uentryList params = uentry_getParams (name); | |
8147 | ||
8148 | if (context_inIterDef () | |
8149 | && uentryList_size (params) == exprNodeList_size (alist)) | |
8150 | { | |
8151 | int i = 0; | |
8152 | ||
8153 | exprNodeList_elements (alist, arg) | |
8154 | { | |
8155 | uentry parg = uentryList_getN (params, i); | |
8156 | ||
8157 | if (uentry_isYield (parg)) | |
8158 | { | |
8159 | uentry ue = exprNode_getUentry (arg); | |
8160 | ||
8161 | if (uentry_isValid (ue)) | |
8162 | { | |
8163 | ; | |
8164 | } | |
8165 | } | |
8166 | ||
8167 | i++; | |
8168 | } end_exprNodeList_elements; | |
8169 | } | |
8170 | ||
8171 | (void) checkArgsReal (name, ret, params, alist, TRUE, ret); | |
8172 | checkUnspecCall (ret, params, alist); | |
8173 | } | |
8174 | ||
8175 | return ret; | |
8176 | } | |
8177 | ||
8178 | /*@exposed@*/ sRef exprNode_getSref (exprNode e) | |
8179 | { | |
8180 | if (exprNode_isDefined (e)) | |
8181 | { | |
8182 | /*@access sRef@*/ | |
8183 | if (e->sref == defref) /*@noaccess sRef@*/ | |
8184 | { | |
8185 | /*@-mods@*/ | |
8186 | e->sref = sRef_makeUnknown (); | |
8187 | sRef_setAliasKind (e->sref, AK_ERROR, fileloc_undefined); | |
8188 | /*@=mods@*/ | |
8189 | return e->sref; | |
8190 | } | |
8191 | else | |
8192 | { | |
8193 | return e->sref; | |
8194 | } | |
8195 | } | |
8196 | else | |
8197 | { | |
8198 | return sRef_undefined; | |
8199 | } | |
8200 | } | |
8201 | ||
8202 | /*@observer@*/ cstring | |
8203 | exprNode_unparseFirst (exprNode e) | |
8204 | { | |
8205 | if (exprNode_isDefined (e)) | |
8206 | { | |
8207 | cstring ret; | |
8208 | ||
8209 | if (e->kind == XPR_STMTLIST | |
8210 | || e->kind == XPR_COMMA || e->kind == XPR_COND) | |
8211 | { | |
8212 | exprNode first = exprData_getPairA (e->edata); | |
8213 | ||
8214 | if (exprNode_isDefined (first)) | |
8215 | { | |
8216 | return (exprNode_unparseFirst (exprData_getPairA (e->edata))); | |
8217 | } | |
8218 | else | |
8219 | { | |
8220 | return (cstring_makeLiteralTemp ("...")); | |
8221 | } | |
8222 | } | |
8223 | ||
8224 | ret = cstring_elide (exprNode_unparse (e), 20); | |
8225 | cstring_markOwned (ret); | |
8226 | ||
8227 | return (ret); | |
8228 | } | |
8229 | else | |
8230 | { | |
8231 | return cstring_makeLiteralTemp ("<error>"); | |
8232 | } | |
8233 | } | |
8234 | ||
8235 | /*@observer@*/ cstring | |
28bf4b0b | 8236 | exprNode_unparse (/*@temp@*/ exprNode e) |
616915dd | 8237 | { |
8238 | if (exprNode_isError (e)) | |
8239 | { | |
8240 | return cstring_makeLiteralTemp ("<error>"); | |
8241 | } | |
8242 | ||
8243 | if (cstring_isDefined (e->etext)) | |
8244 | { | |
8245 | return e->etext; | |
8246 | } | |
8247 | else | |
8248 | { | |
8249 | cstring ret = exprNode_doUnparse (e); | |
8250 | ||
8251 | /*@-modifies@*/ /* benevolent */ | |
8252 | e->etext = ret; | |
8253 | /*@=modifies@*/ | |
8254 | return ret; | |
8255 | } | |
8256 | } | |
8257 | ||
8258 | /*@observer@*/ fileloc | |
8259 | exprNode_loc (exprNode e) | |
8260 | { | |
8261 | if (exprNode_isError (e)) | |
8262 | { | |
8263 | return (g_currentloc); | |
8264 | } | |
8265 | else | |
8266 | { | |
8267 | return (e->loc); | |
8268 | } | |
8269 | } | |
8270 | ||
8271 | /* | |
8272 | ** executes exprNode e | |
8273 | ** recursively rexecutes as though in original parse using | |
8274 | ** information in e->edata | |
8275 | */ | |
8276 | ||
8277 | static /*@only@*/ exprNodeList exprNodeList_effect (exprNodeList e) | |
8278 | { | |
8279 | exprNodeList ret = exprNodeList_new (); | |
8280 | ||
8281 | exprNodeList_elements (e, current) | |
8282 | { | |
8283 | exprNodeList_addh (ret, exprNode_effect (current)); | |
8284 | } end_exprNodeList_elements; | |
8285 | ||
8286 | return ret; | |
8287 | } | |
8288 | ||
8289 | static /*@only@*/ exprNode exprNode_effect (exprNode e) | |
8290 | /*@globals internalState@*/ | |
8291 | { | |
8292 | bool innerEffect = inEffect; | |
8293 | exprNode ret; | |
8294 | exprData data; | |
8295 | ||
8296 | inEffect = TRUE; | |
8297 | ||
8298 | context_clearJustPopped (); | |
8299 | ||
8300 | if (exprNode_isError (e)) | |
8301 | { | |
8302 | ret = exprNode_undefined; | |
8303 | } | |
8304 | else | |
8305 | { | |
8306 | /* | |
8307 | ** Turn off expose and dependent transfer checking. | |
8308 | ** Need to pass exposed internal nodes, | |
8309 | ** [ copying would be a waste! ] | |
8310 | ** [ Actually, I think I wasted a lot more time than its worth ] | |
8311 | ** [ trying to do this. ] | |
8312 | */ | |
8313 | ||
8314 | /*@-exposetrans@*/ | |
8315 | /*@-observertrans@*/ | |
8316 | /*@-dependenttrans@*/ | |
8317 | ||
8318 | data = e->edata; | |
8319 | ||
8320 | switch (e->kind) | |
8321 | { | |
8322 | case XPR_PARENS: | |
8323 | ret = exprNode_addParens (exprData_getUopTok (data), | |
8324 | exprNode_effect (exprData_getUopNode (data))); | |
8325 | break; | |
8326 | case XPR_ASSIGN: | |
8327 | ret = exprNode_assign (exprNode_effect (exprData_getOpA (data)), | |
8328 | exprNode_effect (exprData_getOpB (data)), | |
8329 | exprData_getOpTok (data)); | |
8330 | break; | |
8331 | case XPR_INITBLOCK: | |
8332 | ret = exprNode_undefined; | |
8333 | break; | |
8334 | case XPR_CALL: | |
8335 | ret = exprNode_functionCall (exprNode_effect (exprData_getFcn (data)), | |
8336 | exprNodeList_effect (exprData_getArgs (data))); | |
8337 | break; | |
8338 | case XPR_EMPTY: | |
8339 | ret = e; | |
8340 | break; | |
8341 | ||
8342 | case XPR_LABEL: | |
8343 | ret = e; | |
8344 | break; | |
8345 | ||
8346 | case XPR_CONST: | |
8347 | case XPR_VAR: | |
8348 | { | |
8349 | cstring id = exprData_getId (data); | |
8350 | uentry ue = usymtab_lookupSafe (id); | |
8351 | ||
8352 | ret = exprNode_fromIdentifierAux (ue); | |
8353 | ret->loc = fileloc_update (ret->loc, e->loc); | |
8354 | break; | |
8355 | } | |
8356 | case XPR_BODY: | |
8357 | ret = e; | |
8358 | break; | |
8359 | case XPR_FETCH: | |
8360 | ret = exprNode_arrayFetch (exprNode_effect (exprData_getPairA (data)), | |
8361 | exprNode_effect (exprData_getPairB (data))); | |
8362 | break; | |
8363 | case XPR_OP: | |
8364 | ret = exprNode_op (exprNode_effect (exprData_getOpA (data)), | |
8365 | exprNode_effect (exprData_getOpB (data)), | |
8366 | exprData_getOpTok (data)); | |
8367 | break; | |
8368 | ||
8369 | case XPR_POSTOP: | |
8370 | ret = exprNode_postOp (exprNode_effect (exprData_getUopNode (data)), | |
8371 | exprData_getUopTok (data)); | |
8372 | break; | |
8373 | case XPR_PREOP: | |
8374 | ret = exprNode_preOp (exprNode_effect (exprData_getUopNode (data)), | |
8375 | exprData_getUopTok (data)); | |
8376 | break; | |
8377 | ||
8378 | case XPR_OFFSETOF: | |
8379 | case XPR_SIZEOFT: | |
8380 | case XPR_SIZEOF: | |
8381 | case XPR_ALIGNOFT: | |
8382 | case XPR_ALIGNOF: | |
8383 | ret = e; | |
8384 | break; | |
8385 | ||
8386 | case XPR_VAARG: | |
8387 | ret = exprNode_vaArg (exprData_getCastTok (data), | |
8388 | exprNode_effect (exprData_getCastNode (data)), | |
8389 | exprData_getCastType (data)); | |
8390 | break; | |
8391 | ||
8392 | case XPR_CAST: | |
8393 | ret = exprNode_cast (exprData_getCastTok (data), | |
8394 | exprNode_effect (exprData_getCastNode (data)), | |
8395 | exprData_getCastType (data)); | |
8396 | break; | |
8397 | case XPR_ITERCALL: | |
8398 | ret = exprNode_iterStart (exprData_getIterCallIter (data), | |
8399 | exprNodeList_effect | |
8400 | (exprData_getIterCallArgs (data))); | |
8401 | break; | |
8402 | ||
8403 | case XPR_ITER: | |
8404 | ret = exprNode_iter (exprData_getIterSname (data), | |
8405 | exprNodeList_effect (exprData_getIterAlist (data)), | |
8406 | exprNode_effect (exprData_getIterBody (data)), | |
8407 | exprData_getIterEname (data)); | |
8408 | break; | |
8409 | ||
8410 | case XPR_FOR: | |
8411 | ret = exprNode_for (exprNode_effect (exprData_getPairA (data)), | |
8412 | exprNode_effect (exprData_getPairB (data))); | |
8413 | break; | |
8414 | ||
8415 | case XPR_FORPRED: | |
8416 | ret = exprNode_forPred (exprNode_effect (exprData_getTripleInit (data)), | |
8417 | exprNode_effect (exprData_getTripleTest (data)), | |
8418 | exprNode_effect (exprData_getTripleInc (data))); | |
8419 | break; | |
8420 | ||
8421 | case XPR_TOK: | |
8422 | ret = exprNode_createTok (exprData_getTok (data)); | |
8423 | break; | |
8424 | ||
8425 | case XPR_GOTO: | |
8426 | ret = exprNode_goto (exprData_getLiteral (data)); | |
8427 | ret->loc = fileloc_update (ret->loc, e->loc); | |
8428 | break; | |
8429 | ||
8430 | case XPR_CONTINUE: | |
8431 | ret = exprNode_continue (exprData_getTok (data), QSAFEBREAK); | |
8432 | break; | |
8433 | ||
8434 | case XPR_BREAK: | |
8435 | ret = exprNode_break (exprData_getTok (data), QSAFEBREAK); | |
8436 | break; | |
8437 | ||
8438 | case XPR_RETURN: | |
8439 | ret = exprNode_return (exprNode_effect (exprData_getSingle (data))); | |
8440 | break; | |
8441 | ||
8442 | case XPR_NULLRETURN: | |
8443 | ret = exprNode_nullReturn (exprData_getTok (data)); | |
8444 | break; | |
8445 | ||
8446 | case XPR_COMMA: | |
8447 | ret = exprNode_comma (exprNode_effect (exprData_getPairA (data)), | |
8448 | exprNode_effect (exprData_getPairB (data))); | |
8449 | break; | |
8450 | ||
8451 | case XPR_COND: | |
8452 | ret = exprNode_cond (exprNode_effect (exprData_getTriplePred (data)), | |
8453 | exprNode_effect (exprData_getTripleTrue (data)), | |
8454 | exprNode_effect (exprData_getTripleFalse (data))); | |
8455 | break; | |
8456 | case XPR_IF: | |
8457 | ret = exprNode_if (exprNode_effect (exprData_getPairA (data)), | |
8458 | exprNode_effect (exprData_getPairB (data))); | |
8459 | break; | |
8460 | ||
8461 | case XPR_IFELSE: | |
8462 | ret = exprNode_ifelse (exprNode_effect (exprData_getTriplePred (data)), | |
8463 | exprNode_effect (exprData_getTripleTrue (data)), | |
8464 | exprNode_effect (exprData_getTripleFalse (data))); | |
8465 | break; | |
8466 | case XPR_WHILEPRED: | |
8467 | ret = exprNode_whilePred (exprData_getSingle (data)); | |
8468 | break; | |
8469 | ||
8470 | case XPR_WHILE: | |
8471 | ret = exprNode_while (exprNode_effect (exprData_getPairA (data)), | |
8472 | exprNode_effect (exprData_getPairB (data))); | |
8473 | break; | |
8474 | ||
8475 | case XPR_DOWHILE: | |
8476 | ret = exprNode_doWhile (exprNode_effect (exprData_getPairA (data)), | |
8477 | exprNode_effect (exprData_getPairB (data))); | |
8478 | break; | |
8479 | ||
8480 | case XPR_BLOCK: | |
8481 | ret = exprNode_makeBlock (exprNode_effect (exprData_getSingle (data))); | |
8482 | break; | |
8483 | ||
8484 | case XPR_STMT: | |
8485 | ret = exprNode_statement (exprNode_effect (exprData_getUopNode (data)), | |
8486 | exprData_getUopTok (data)); | |
8487 | break; | |
8488 | ||
8489 | case XPR_STMTLIST: | |
8490 | ret = exprNode_concat (exprNode_effect (exprData_getPairA (data)), | |
8491 | exprNode_effect (exprData_getPairB (data))); | |
8492 | break; | |
8493 | ||
8494 | case XPR_FTCASE: | |
8495 | case XPR_CASE: | |
8496 | ret = exprNode_caseMarker | |
8497 | (exprNode_effect (exprData_getSingle (data)), | |
8498 | TRUE); | |
8499 | break; | |
8500 | ||
8501 | case XPR_FTDEFAULT: | |
8502 | case XPR_DEFAULT: | |
8503 | ret = exprNode_createTok (exprData_getTok (data)); | |
8504 | break; | |
8505 | ||
8506 | case XPR_SWITCH: | |
8507 | ret = exprNode_switch (exprNode_effect (exprData_getPairA (data)), | |
8508 | exprNode_effect (exprData_getPairB (data))); | |
8509 | break; | |
8510 | ||
8511 | case XPR_INIT: | |
8512 | ret = exprNode_makeInitialization | |
8513 | (exprData_getInitId (data), | |
8514 | exprNode_effect (exprData_getInitNode (data))); | |
8515 | break; | |
8516 | ||
8517 | case XPR_FACCESS: | |
28bf4b0b | 8518 | ret = exprNode_fieldAccessAux |
8519 | (exprNode_effect (exprData_getFieldNode (data)), | |
8520 | exprNode_loc (exprData_getFieldNode (data)), | |
8521 | cstring_copy (exprData_getFieldName (data))); | |
616915dd | 8522 | break; |
8523 | ||
8524 | case XPR_ARROW: | |
28bf4b0b | 8525 | ret = exprNode_arrowAccessAux |
8526 | (exprNode_effect (exprData_getFieldNode (data)), | |
8527 | exprNode_loc (exprData_getFieldNode (data)), | |
8528 | cstring_copy (exprData_getFieldName (data))); | |
616915dd | 8529 | break; |
8530 | ||
8531 | case XPR_STRINGLITERAL: | |
8532 | ret = e; | |
8533 | break; | |
8534 | ||
8535 | case XPR_NUMLIT: | |
8536 | ret = e; | |
8537 | break; | |
8538 | ||
8539 | case XPR_NODE: | |
8540 | ret = e; | |
8541 | break; | |
8542 | /*@-branchstate@*/ | |
8543 | } | |
8544 | /*@=branchstate@*/ | |
8545 | /*@=observertrans@*/ | |
8546 | /*@=exposetrans@*/ | |
8547 | /*@=dependenttrans@*/ | |
8548 | } | |
8549 | ||
8550 | if (!innerEffect) | |
8551 | { | |
8552 | inEffect = FALSE; | |
8553 | } | |
8554 | ||
8555 | return ret; | |
8556 | } | |
8557 | ||
8558 | static /*@observer@*/ cstring exprNode_rootVarName (exprNode e) | |
8559 | { | |
8560 | cstring ret; | |
8561 | exprData data; | |
8562 | ||
8563 | if (exprNode_isError (e)) | |
8564 | { | |
8565 | return cstring_undefined; | |
8566 | } | |
8567 | ||
8568 | data = e->edata; | |
8569 | ||
8570 | switch (e->kind) | |
8571 | { | |
8572 | case XPR_PARENS: | |
8573 | ret = exprNode_rootVarName (exprData_getUopNode (data)); | |
8574 | break; | |
8575 | case XPR_ASSIGN: | |
8576 | ret = exprNode_rootVarName (exprData_getOpA (data)); | |
8577 | break; | |
8578 | case XPR_CONST: | |
8579 | case XPR_VAR: | |
8580 | ret = exprData_getId (data); | |
8581 | break; | |
8582 | case XPR_LABEL: | |
8583 | case XPR_TOK: | |
8584 | case XPR_ITERCALL: | |
8585 | case XPR_EMPTY: | |
8586 | case XPR_CALL: | |
8587 | case XPR_INITBLOCK: | |
8588 | case XPR_BODY: | |
8589 | case XPR_FETCH: | |
8590 | case XPR_OP: | |
8591 | case XPR_POSTOP: | |
8592 | case XPR_PREOP: | |
8593 | case XPR_OFFSETOF: | |
8594 | case XPR_ALIGNOFT: | |
8595 | case XPR_ALIGNOF: | |
8596 | case XPR_SIZEOFT: | |
8597 | case XPR_SIZEOF: | |
8598 | case XPR_VAARG: | |
8599 | case XPR_CAST: | |
8600 | case XPR_ITER: | |
8601 | case XPR_FOR: | |
8602 | case XPR_FORPRED: | |
8603 | case XPR_BREAK: | |
8604 | case XPR_RETURN: | |
8605 | case XPR_NULLRETURN: | |
8606 | case XPR_COMMA: | |
8607 | case XPR_COND: | |
8608 | case XPR_IF: | |
8609 | case XPR_IFELSE: | |
8610 | case XPR_WHILE: | |
8611 | case XPR_WHILEPRED: | |
8612 | case XPR_DOWHILE: | |
8613 | case XPR_GOTO: | |
8614 | case XPR_CONTINUE: | |
8615 | case XPR_FTDEFAULT: | |
8616 | case XPR_DEFAULT: | |
8617 | case XPR_SWITCH: | |
8618 | case XPR_FTCASE: | |
8619 | case XPR_CASE: | |
8620 | case XPR_BLOCK: | |
8621 | case XPR_STMT: | |
8622 | case XPR_STMTLIST: | |
8623 | case XPR_INIT: | |
8624 | case XPR_FACCESS: | |
8625 | case XPR_ARROW: | |
8626 | case XPR_NODE: | |
8627 | case XPR_NUMLIT: | |
8628 | case XPR_STRINGLITERAL: | |
8629 | ret = cstring_undefined; | |
8630 | break; | |
8631 | } | |
8632 | ||
8633 | return ret; | |
8634 | } | |
8635 | ||
616915dd | 8636 | static /*@only@*/ cstring exprNode_doUnparse (exprNode e) |
8637 | { | |
8638 | cstring ret; | |
8639 | exprData data; | |
8640 | ||
8641 | if (exprNode_isError (e)) | |
8642 | { | |
8643 | static /*@only@*/ cstring error = cstring_undefined; | |
8644 | ||
8645 | if (!cstring_isDefined (error)) | |
8646 | { | |
8647 | error = cstring_makeLiteral ("<error>"); | |
8648 | } | |
8649 | ||
8650 | return error; | |
8651 | } | |
8652 | ||
8653 | data = e->edata; | |
8654 | ||
8655 | switch (e->kind) | |
8656 | { | |
8657 | case XPR_PARENS: | |
8658 | ret = message ("(%s)", exprNode_unparse (exprData_getUopNode (e->edata))); | |
8659 | break; | |
8660 | case XPR_ASSIGN: | |
8661 | ret = message ("%s %s %s", | |
8662 | exprNode_unparse (exprData_getOpA (data)), | |
8663 | lltok_unparse (exprData_getOpTok (data)), | |
8664 | exprNode_unparse (exprData_getOpB (data))); | |
8665 | break; | |
8666 | case XPR_CALL: | |
8667 | ret = message ("%s(%q)", | |
8668 | exprNode_unparse (exprData_getFcn (data)), | |
8669 | exprNodeList_unparse (exprData_getArgs (data))); | |
8670 | break; | |
8671 | case XPR_INITBLOCK: | |
8672 | ret = message ("{ %q }", exprNodeList_unparse (exprData_getArgs (data))); | |
8673 | break; | |
8674 | case XPR_EMPTY: | |
8675 | ret = cstring_undefined; | |
8676 | break; | |
8677 | case XPR_LABEL: | |
8678 | ret = message ("%s:", exprData_getId (data)); | |
8679 | break; | |
8680 | case XPR_CONST: | |
8681 | case XPR_VAR: | |
8682 | ret = cstring_copy (exprData_getId (data)); | |
8683 | break; | |
8684 | case XPR_FETCH: | |
8685 | ret = message ("%s[%s]", exprNode_unparse (exprData_getPairA (data)), | |
8686 | exprNode_unparse (exprData_getPairB (data))); | |
8687 | break; | |
8688 | case XPR_BODY: | |
8689 | ret = message ("<body>"); | |
8690 | break; | |
8691 | case XPR_OP: | |
8692 | ret = message ("%s %s %s", | |
8693 | exprNode_unparse (exprData_getOpA (data)), | |
8694 | lltok_unparse (exprData_getOpTok (data)), | |
8695 | exprNode_unparse (exprData_getOpB (data))); | |
8696 | break; | |
8697 | ||
8698 | case XPR_PREOP: | |
8699 | ret = message ("%s%s", | |
8700 | lltok_unparse (exprData_getUopTok (data)), | |
8701 | exprNode_unparse (exprData_getUopNode (data))); | |
8702 | break; | |
8703 | ||
8704 | case XPR_POSTOP: | |
8705 | ret = message ("%s%s", | |
8706 | exprNode_unparse (exprData_getUopNode (data)), | |
8707 | lltok_unparse (exprData_getUopTok (data))); | |
8708 | break; | |
8709 | ||
8710 | case XPR_OFFSETOF: | |
8711 | ret = message ("offsetof(%s,%q)", | |
8712 | ctype_unparse (qtype_getType (exprData_getOffsetType (data))), | |
8713 | cstringList_unparseSep (exprData_getOffsetName (data), cstring_makeLiteralTemp ("."))); | |
8714 | break; | |
8715 | ||
8716 | case XPR_SIZEOFT: | |
8717 | ret = message ("sizeof(%s)", ctype_unparse (qtype_getType (exprData_getType (data)))); | |
8718 | break; | |
8719 | ||
8720 | case XPR_SIZEOF: | |
8721 | ret = message ("sizeof(%s)", exprNode_unparse (exprData_getSingle (data))); | |
8722 | break; | |
8723 | ||
8724 | case XPR_ALIGNOFT: | |
8725 | ret = message ("alignof(%s)", ctype_unparse (qtype_getType (exprData_getType (data)))); | |
8726 | break; | |
8727 | ||
8728 | case XPR_ALIGNOF: | |
8729 | ret = message ("alignof(%s)", exprNode_unparse (exprData_getSingle (data))); | |
8730 | break; | |
8731 | ||
8732 | case XPR_VAARG: | |
8733 | ret = message ("va_arg(%s, %q)", | |
8734 | exprNode_unparse (exprData_getCastNode (data)), | |
8735 | qtype_unparse (exprData_getCastType (data))); | |
8736 | break; | |
8737 | ||
8738 | case XPR_ITERCALL: | |
8739 | ret = message ("%q(%q)", | |
8740 | uentry_getName (exprData_getIterCallIter (data)), | |
8741 | exprNodeList_unparse (exprData_getIterCallArgs (data))); | |
8742 | break; | |
8743 | case XPR_ITER: | |
8744 | ret = message ("%q(%q) %s %q", | |
8745 | uentry_getName (exprData_getIterSname (data)), | |
8746 | exprNodeList_unparse (exprData_getIterAlist (data)), | |
8747 | exprNode_unparse (exprData_getIterBody (data)), | |
8748 | uentry_getName (exprData_getIterEname (data))); | |
8749 | break; | |
8750 | case XPR_CAST: | |
8751 | ret = message ("(%q)%s", | |
8752 | qtype_unparse (exprData_getCastType (data)), | |
8753 | exprNode_unparse (exprData_getCastNode (data))); | |
8754 | break; | |
8755 | ||
8756 | case XPR_FOR: | |
8757 | ret = message ("%s %s", | |
8758 | exprNode_unparse (exprData_getPairA (data)), | |
8759 | exprNode_unparse (exprData_getPairB (data))); | |
8760 | break; | |
8761 | ||
8762 | case XPR_FORPRED: | |
8763 | ret = message ("for (%s; %s; %s)", | |
8764 | exprNode_unparse (exprData_getTripleInit (data)), | |
8765 | exprNode_unparse (exprData_getTripleTest (data)), | |
8766 | exprNode_unparse (exprData_getTripleInc (data))); | |
8767 | break; | |
8768 | ||
8769 | case XPR_GOTO: | |
8770 | ret = message ("goto %s", exprData_getLiteral (data)); | |
8771 | break; | |
8772 | ||
8773 | case XPR_CONTINUE: | |
8774 | ret = cstring_makeLiteral ("continue"); | |
8775 | break; | |
8776 | ||
8777 | case XPR_BREAK: | |
8778 | ret = cstring_makeLiteral ("break"); | |
8779 | break; | |
8780 | ||
8781 | case XPR_RETURN: | |
8782 | ret = message ("return %s", exprNode_unparse (exprData_getSingle (data))); | |
8783 | break; | |
8784 | ||
8785 | case XPR_NULLRETURN: | |
8786 | ret = cstring_makeLiteral ("return"); | |
8787 | break; | |
8788 | ||
8789 | case XPR_COMMA: | |
8790 | ret = message ("%s, %s", | |
8791 | exprNode_unparse (exprData_getPairA (data)), | |
8792 | exprNode_unparse (exprData_getPairB (data))); | |
8793 | break; | |
8794 | ||
8795 | case XPR_COND: | |
8796 | ret = message ("%s ? %s : %s", | |
8797 | exprNode_unparse (exprData_getTriplePred (data)), | |
8798 | exprNode_unparse (exprData_getTripleTrue (data)), | |
8799 | exprNode_unparse (exprData_getTripleFalse (data))); | |
8800 | break; | |
8801 | case XPR_IF: | |
8802 | ret = message ("if (%s) %s", | |
8803 | exprNode_unparse (exprData_getPairA (data)), | |
8804 | exprNode_unparse (exprData_getPairB (data))); | |
8805 | break; | |
8806 | ||
8807 | case XPR_IFELSE: | |
8808 | ret = message ("if (%s) %s else %s", | |
8809 | exprNode_unparse (exprData_getTriplePred (data)), | |
8810 | exprNode_unparse (exprData_getTripleTrue (data)), | |
8811 | exprNode_unparse (exprData_getTripleFalse (data))); | |
8812 | break; | |
8813 | case XPR_WHILE: | |
8814 | ret = message ("while (%s) %s", | |
8815 | exprNode_unparse (exprData_getPairA (data)), | |
8816 | exprNode_unparse (exprData_getPairB (data))); | |
8817 | break; | |
8818 | ||
8819 | case XPR_WHILEPRED: | |
8820 | ret = cstring_copy (exprNode_unparse (exprData_getSingle (data))); | |
8821 | break; | |
8822 | ||
8823 | case XPR_TOK: | |
8824 | ret = cstring_copy (lltok_unparse (exprData_getTok (data))); | |
8825 | break; | |
8826 | ||
8827 | case XPR_DOWHILE: | |
8828 | ret = message ("do { %s } while (%s)", | |
8829 | exprNode_unparse (exprData_getPairB (data)), | |
8830 | exprNode_unparse (exprData_getPairA (data))); | |
8831 | break; | |
8832 | ||
8833 | case XPR_BLOCK: | |
8834 | ret = message ("{ %s }", exprNode_unparseFirst (exprData_getSingle (data))); | |
8835 | break; | |
8836 | ||
8837 | case XPR_STMT: | |
8838 | ret = cstring_copy (exprNode_unparse (exprData_getUopNode (data))); | |
8839 | break; | |
8840 | ||
8841 | case XPR_STMTLIST: | |
8842 | ret = message ("%s; %s", | |
8843 | exprNode_unparse (exprData_getPairA (data)), | |
8844 | exprNode_unparse (exprData_getPairB (data))); | |
8845 | break; | |
8846 | ||
8847 | case XPR_FTDEFAULT: | |
8848 | case XPR_DEFAULT: | |
8849 | ret = cstring_makeLiteral ("default:"); | |
8850 | break; | |
8851 | ||
8852 | case XPR_SWITCH: | |
8853 | ret = message ("switch (%s) %s", | |
8854 | exprNode_unparse (exprData_getPairA (data)), | |
8855 | exprNode_unparse (exprData_getPairB (data))); | |
8856 | break; | |
8857 | ||
8858 | case XPR_FTCASE: | |
8859 | case XPR_CASE: | |
8860 | ret = message ("case %s:", | |
8861 | exprNode_unparse (exprData_getSingle (data))); | |
8862 | break; | |
8863 | ||
8864 | case XPR_INIT: | |
28bf4b0b | 8865 | if (exprNode_isError (exprData_getInitNode (data))) |
8866 | { | |
8867 | ret = message ("%q", idDecl_unparseC (exprData_getInitId (data))); | |
8868 | } | |
8869 | else | |
8870 | { | |
8871 | ret = message ("%q = %s", | |
8872 | idDecl_unparseC (exprData_getInitId (data)), | |
8873 | exprNode_unparse (exprData_getInitNode (data))); | |
8874 | } | |
616915dd | 8875 | break; |
8876 | ||
8877 | case XPR_FACCESS: | |
8878 | ret = message ("%s.%s", | |
8879 | exprNode_unparse (exprData_getFieldNode (data)), | |
8880 | exprData_getFieldName (data)); | |
8881 | break; | |
8882 | ||
8883 | case XPR_ARROW: | |
8884 | ret = message ("%s->%s", | |
8885 | exprNode_unparse (exprData_getFieldNode (data)), | |
8886 | exprData_getFieldName (data)); | |
8887 | break; | |
8888 | ||
8889 | case XPR_STRINGLITERAL: | |
28bf4b0b | 8890 | ret = message ("\"%s\"", exprData_getLiteral (data)); |
616915dd | 8891 | break; |
8892 | ||
8893 | case XPR_NUMLIT: | |
8894 | ret = cstring_copy (exprData_getLiteral (data)); | |
8895 | break; | |
8896 | ||
8897 | case XPR_NODE: | |
8898 | ret = cstring_makeLiteral ("<node>"); | |
8899 | break; | |
8900 | } | |
8901 | ||
8902 | return ret; | |
8903 | } | |
8904 | ||
28bf4b0b | 8905 | bool |
8906 | exprNode_isInitializer (exprNode e) | |
8907 | { | |
8908 | return (exprNode_isDefined (e) | |
8909 | && e->kind == XPR_INIT); | |
8910 | } | |
8911 | ||
616915dd | 8912 | bool |
8913 | exprNode_isCharLit (exprNode e) | |
8914 | { | |
8915 | if (exprNode_isDefined (e)) | |
8916 | { | |
8917 | return (multiVal_isChar (exprNode_getValue (e))); | |
8918 | } | |
8919 | else | |
8920 | { | |
8921 | return FALSE; | |
8922 | } | |
8923 | } | |
8924 | ||
8925 | bool | |
8926 | exprNode_isNumLit (exprNode e) | |
8927 | { | |
8928 | if (exprNode_isDefined (e)) | |
8929 | { | |
8930 | return (multiVal_isInt (exprNode_getValue (e))); | |
8931 | } | |
8932 | else | |
8933 | { | |
8934 | return FALSE; | |
8935 | } | |
8936 | } | |
8937 | ||
8938 | static bool | |
8939 | exprNode_isFalseConstant (exprNode e) | |
8940 | { | |
8941 | if (exprNode_isDefined (e)) | |
8942 | { | |
8943 | cstring s = exprNode_rootVarName (e); | |
8944 | ||
8945 | if (cstring_equal (s, context_getFalseName ())) | |
8946 | { | |
8947 | return TRUE; | |
8948 | } | |
8949 | } | |
8950 | ||
8951 | return FALSE; | |
8952 | } | |
8953 | ||
8954 | bool | |
8955 | exprNode_matchLiteral (ctype expected, exprNode e) | |
8956 | { | |
8957 | if (exprNode_isDefined (e)) | |
8958 | { | |
8959 | multiVal m = exprNode_getValue (e); | |
8960 | ||
8961 | if (multiVal_isDefined (m)) | |
8962 | { | |
8963 | if (multiVal_isInt (m)) | |
8964 | { | |
8965 | long int val = multiVal_forceInt (m); | |
8966 | ||
8967 | if (ctype_isDirectBool (ctype_realishType (expected))) | |
8968 | { | |
8969 | if (val == 0) | |
8970 | { | |
8971 | return FALSE; /* really?! return TRUE; allow use of 0 for FALSE */ | |
8972 | } | |
8973 | else | |
8974 | { | |
8975 | return FALSE; | |
8976 | } | |
8977 | } | |
8978 | ||
8979 | if (ctype_isRealInt (expected)) | |
8980 | { | |
8981 | /* | |
8982 | ** unsigned <- [ constant >= 0 is okay ] | |
8983 | */ | |
8984 | ||
8985 | if (ctype_isUnsigned (expected)) | |
8986 | { | |
8987 | if (val < 0) | |
8988 | { | |
8989 | return FALSE; | |
8990 | } | |
8991 | } | |
8992 | ||
8993 | /* | |
8994 | ** No checks on sizes of integers...maybe add | |
8995 | ** these later. | |
8996 | */ | |
8997 | ||
8998 | DPRINTF (("Here: %s => %s", exprNode_unparse (e), ctype_unparse (expected))); | |
8999 | DPRINTF (("Type: %s / %s", ctype_unparse (exprNode_getType (e)), | |
9000 | bool_unparse (ctype_isInt (exprNode_getType (e))))); | |
9001 | ||
9002 | if (context_getFlag (FLG_NUMLITERAL) | |
9003 | && (ctype_isRegularInt (exprNode_getType (e)) || val == 0)) { | |
9004 | return TRUE; | |
9005 | } else { | |
9006 | if (val == 0) { | |
9007 | return TRUE; | |
9008 | } else { | |
9009 | return FALSE; /* evs 2000-05-17: previously, always returned TRUE */ | |
9010 | } | |
9011 | } | |
9012 | } | |
9013 | else if (ctype_isChar (expected)) | |
9014 | { | |
9015 | return FALSE; | |
9016 | } | |
9017 | else if (ctype_isArrayPtr (expected)) | |
9018 | { | |
9019 | return (val == 0); | |
9020 | } | |
9021 | else if (ctype_isAnyFloat (expected)) | |
9022 | { | |
9023 | return (context_getFlag (FLG_NUMLITERAL)); | |
9024 | } | |
9025 | else | |
9026 | { | |
9027 | return FALSE; | |
9028 | } | |
9029 | } | |
9030 | else if (multiVal_isDouble (m)) | |
9031 | { | |
9032 | if (ctype_isAnyFloat (expected)) | |
9033 | { | |
9034 | return TRUE; | |
9035 | } | |
9036 | } | |
9037 | else if (multiVal_isChar (m)) | |
9038 | { | |
9039 | char val = multiVal_forceChar (m); | |
9040 | ||
9041 | if (ctype_isChar (expected)) | |
9042 | { | |
9043 | if (ctype_isUnsigned (expected) && ((int)val) < 0) | |
9044 | { | |
9045 | return FALSE; | |
9046 | } | |
9047 | else | |
9048 | { | |
9049 | return TRUE; | |
9050 | } | |
9051 | } | |
9052 | } | |
9053 | else | |
9054 | { | |
9055 | return FALSE; | |
9056 | } | |
9057 | } | |
9058 | } | |
9059 | ||
9060 | return FALSE; | |
9061 | } | |
9062 | ||
9063 | bool | |
9064 | exprNode_matchType (ctype expected, exprNode e) | |
9065 | { | |
9066 | ctype actual; | |
9067 | ||
9068 | if (!exprNode_isDefined (e)) return TRUE; | |
9069 | ||
9070 | actual = ctype_realishType (exprNode_getType (e)); | |
9071 | ||
9072 | if (ctype_match (ctype_realishType (expected), actual)) | |
9073 | { | |
9074 | return TRUE; | |
9075 | } | |
9076 | ||
9077 | llassert (!exprNode_isError (e)); | |
9078 | return (exprNode_matchLiteral (expected, e)); | |
9079 | } | |
9080 | ||
9081 | static bool | |
9082 | exprNode_matchTypes (exprNode e1, exprNode e2) | |
9083 | { | |
9084 | ctype t1; | |
9085 | ctype t2; | |
9086 | ||
9087 | if (!exprNode_isDefined (e1)) return TRUE; | |
9088 | if (!exprNode_isDefined (e2)) return TRUE; | |
9089 | ||
9090 | /* | |
9091 | ** realish type --- keep bools, bools | |
9092 | */ | |
9093 | ||
9094 | t1 = ctype_realishType (exprNode_getType (e1)); | |
9095 | t2 = ctype_realishType (exprNode_getType (e2)); | |
9096 | ||
9097 | if (ctype_match (t1, t2)) | |
9098 | { | |
9099 | return TRUE; | |
9100 | } | |
9101 | ||
9102 | return (exprNode_matchLiteral (t1, e2) || exprNode_matchLiteral (t2, e1)); | |
9103 | } | |
9104 | ||
9105 | /* | |
9106 | ** pass e as ct | |
9107 | */ | |
9108 | ||
9109 | static bool | |
9110 | exprNode_matchArgType (ctype ct, exprNode e) | |
9111 | { | |
9112 | ctype et; | |
9113 | ||
9114 | if (!exprNode_isDefined (e)) | |
9115 | { | |
9116 | return TRUE; | |
9117 | } | |
9118 | ||
9119 | et = ctype_realType (exprNode_getType (e)); | |
9120 | ||
9121 | if (ctype_matchArg (ct, et)) return TRUE; | |
9122 | ||
9123 | llassert (!exprNode_isError (e)); | |
9124 | return (exprNode_matchLiteral (ct, e)); | |
9125 | } | |
9126 | ||
9127 | static /*@only@*/ exprNodeSList | |
9128 | exprNode_flatten (/*@dependent@*/ exprNode e) /*@*/ | |
9129 | { | |
9130 | if (exprNode_isDefined (e)) | |
9131 | { | |
9132 | if (e->kind == XPR_STMTLIST) | |
9133 | { | |
9134 | return (exprNodeSList_append | |
9135 | (exprNode_flatten (exprData_getPairA (e->edata)), | |
9136 | exprNode_flatten (exprData_getPairB (e->edata)))); | |
9137 | } | |
9138 | else if (e->kind == XPR_BLOCK) | |
9139 | { | |
9140 | return (exprNode_flatten (exprData_getSingle (e->edata))); | |
9141 | } | |
9142 | else | |
9143 | { | |
9144 | return (exprNodeSList_singleton (e)); | |
9145 | } | |
9146 | } | |
9147 | ||
9148 | return exprNodeSList_new (); | |
9149 | } | |
9150 | ||
9151 | static /*@exposed@*/ exprNode | |
9152 | exprNode_lastStatement (/*@returned@*/ exprNode e) | |
9153 | { | |
9154 | if (exprNode_isDefined (e)) | |
9155 | { | |
9156 | if (e->kind == XPR_STMTLIST) | |
9157 | { | |
9158 | exprNode b = exprData_getPairB (e->edata); | |
9159 | ||
9160 | if (exprNode_isDefined (b)) | |
9161 | { | |
9162 | return exprNode_lastStatement (b); | |
9163 | } | |
9164 | else | |
9165 | { | |
9166 | return exprNode_lastStatement (exprData_getPairA (e->edata)); | |
9167 | } | |
9168 | } | |
9169 | else if (e->kind == XPR_BLOCK) | |
9170 | { | |
9171 | return (exprNode_lastStatement (exprData_getSingle (e->edata))); | |
9172 | } | |
9173 | else | |
9174 | { | |
9175 | return (e); | |
9176 | } | |
9177 | } | |
9178 | ||
9179 | return exprNode_undefined; | |
9180 | } | |
9181 | ||
9182 | static /*@exposed@*/ exprNode | |
9183 | exprNode_firstStatement (/*@returned@*/ exprNode e) | |
9184 | { | |
9185 | if (exprNode_isDefined (e)) | |
9186 | { | |
9187 | if (e->kind == XPR_STMTLIST) | |
9188 | { | |
9189 | exprNode b = exprData_getPairA (e->edata); | |
9190 | ||
9191 | if (exprNode_isDefined (b)) | |
9192 | { | |
9193 | return exprNode_firstStatement (b); | |
9194 | } | |
9195 | else | |
9196 | { | |
9197 | return exprNode_firstStatement (exprData_getPairB (e->edata)); | |
9198 | } | |
9199 | } | |
9200 | else if (e->kind == XPR_BLOCK) | |
9201 | { | |
9202 | return (exprNode_firstStatement (exprData_getSingle (e->edata))); | |
9203 | } | |
9204 | else | |
9205 | { | |
9206 | return (e); | |
9207 | } | |
9208 | } | |
9209 | ||
9210 | return exprNode_undefined; | |
9211 | } | |
9212 | ||
9213 | static void | |
9214 | exprNode_mergeUSs (exprNode res, exprNode other) | |
9215 | { | |
9216 | if (exprNode_isDefined (res) && exprNode_isDefined (other)) | |
9217 | { | |
9218 | res->msets = sRefSet_union (res->msets, other->msets); | |
9219 | res->sets = sRefSet_union (res->sets, other->sets); | |
9220 | res->uses = sRefSet_union (res->uses, other->uses); | |
9221 | } | |
9222 | } | |
9223 | ||
9224 | static void | |
9225 | exprNode_mergeCondUSs (exprNode res, exprNode other1, exprNode other2) | |
9226 | { | |
9227 | if (exprNode_isDefined (res)) | |
9228 | { | |
9229 | if (exprNode_isDefined (other1)) | |
9230 | { | |
9231 | res->sets = sRefSet_union (res->sets, other1->sets); | |
9232 | res->msets = sRefSet_union (res->msets, other1->msets); | |
9233 | res->uses = sRefSet_union (res->uses, other1->uses); | |
9234 | } | |
9235 | if (exprNode_isDefined (other2)) | |
9236 | { | |
9237 | res->sets = sRefSet_union (res->sets, other2->sets); | |
9238 | res->msets = sRefSet_union (res->msets, other2->msets); | |
9239 | res->uses = sRefSet_union (res->uses, other2->uses); | |
9240 | } | |
9241 | } | |
9242 | } | |
9243 | ||
9244 | /* | |
9245 | ** modifies e->uses | |
9246 | ** | |
9247 | ** Reports errors is s is not defined. | |
9248 | */ | |
9249 | ||
9250 | static void | |
28bf4b0b | 9251 | exprNode_addUse (exprNode e, /*@exposed@*/ sRef s) |
616915dd | 9252 | { |
9253 | if (exprNode_isDefined (e)) | |
9254 | { | |
9255 | e->uses = sRefSet_insert (e->uses, s); | |
9256 | } | |
9257 | } | |
9258 | ||
9259 | void | |
28bf4b0b | 9260 | exprNode_checkUse (exprNode e, /*@exposed@*/ sRef s, fileloc loc) |
616915dd | 9261 | { |
9262 | if (sRef_isKnown (s) && !sRef_isConst (s)) | |
9263 | { | |
9264 | /* | |
9265 | ** need to check all outer types are useable | |
9266 | */ | |
9267 | ||
9268 | DPRINTF (("Check use: %s / %s", | |
9269 | exprNode_unparse (e), sRef_unparse (s))); | |
28bf4b0b | 9270 | |
616915dd | 9271 | exprNode_addUse (e, s); |
9272 | ||
9273 | if (!context_inProtectVars ()) | |
9274 | { | |
9275 | /* | |
9276 | ** only report the deepest error | |
9277 | */ | |
9278 | ||
9279 | sRef errorRef = sRef_undefined; | |
9280 | sRef lastRef = sRef_undefined; | |
9281 | bool deadRef = FALSE; | |
9282 | bool unuseable = FALSE; | |
9283 | bool errorMaybe = FALSE; | |
9284 | ||
9285 | while (sRef_isValid (s) && sRef_isKnown (s)) | |
9286 | { | |
9287 | ynm readable = sRef_isReadable (s); | |
9288 | ||
28bf4b0b | 9289 | DPRINTF (("Readable: %s / %s", |
9290 | sRef_unparseFull (s), ynm_unparse (readable))); | |
9291 | ||
616915dd | 9292 | if (!(ynm_toBoolStrict (readable))) |
9293 | { | |
9294 | if (ynm_isMaybe (readable)) | |
9295 | { | |
9296 | lastRef = errorRef; | |
9297 | errorRef = s; | |
cd7d9b17 | 9298 | DPRINTF (("Setting ERROR: %s", sRef_unparseFull (s))); |
616915dd | 9299 | deadRef = sRef_isPossiblyDead (errorRef); |
9300 | unuseable = sRef_isUnuseable (errorRef); | |
9301 | errorMaybe = TRUE; | |
9302 | } | |
9303 | else | |
9304 | { | |
9305 | lastRef = errorRef; | |
9306 | errorRef = s; | |
9307 | deadRef = sRef_isDead (errorRef); | |
9308 | unuseable = sRef_isUnuseable (errorRef); | |
9309 | errorMaybe = FALSE; | |
9310 | } | |
9311 | ||
9312 | if (!sRef_isPartial (s)) | |
9313 | { | |
cd7d9b17 | 9314 | DPRINTF (("Defining! %s", sRef_unparseFull (s))); |
616915dd | 9315 | sRef_setDefined (s, fileloc_undefined); |
9316 | } | |
9317 | } | |
9318 | ||
9319 | s = sRef_getBaseSafe (s); | |
9320 | } /* end while */ | |
9321 | ||
9322 | if (sRef_isValid (errorRef)) | |
9323 | { | |
9324 | if (sRef_isValid (lastRef) && sRef_isField (lastRef) | |
9325 | && sRef_isPointer (errorRef)) | |
9326 | { | |
9327 | errorRef = lastRef; | |
9328 | } | |
9329 | ||
9330 | if (deadRef) | |
9331 | { | |
9332 | if (sRef_isThroughArrayFetch (errorRef)) | |
9333 | { | |
9334 | if (optgenerror | |
9335 | (FLG_STRICTUSERELEASED, | |
9336 | message ("%q %q may be used after being released", | |
9337 | sRef_unparseKindNamePlain (errorRef), | |
9338 | sRef_unparse (errorRef)), | |
9339 | loc)) | |
9340 | { | |
9341 | sRef_showRefKilled (errorRef); | |
9342 | ||
9343 | if (sRef_isKept (errorRef)) | |
9344 | { | |
9345 | sRef_clearAliasState (errorRef, loc); | |
9346 | } | |
9347 | } | |
9348 | } | |
9349 | else | |
9350 | { | |
9351 | DPRINTF (("HERE: %s", sRef_unparse (errorRef))); | |
9352 | ||
9353 | if (optgenerror | |
9354 | (FLG_USERELEASED, | |
9355 | message ("%q %q %qused after being released", | |
9356 | sRef_unparseKindNamePlain (errorRef), | |
9357 | sRef_unparse (errorRef), | |
9358 | cstring_makeLiteral (errorMaybe | |
9359 | ? "may be " : "")), | |
9360 | loc)) | |
9361 | { | |
9362 | sRef_showRefKilled (errorRef); | |
9363 | ||
9364 | if (sRef_isKept (errorRef)) | |
9365 | { | |
9366 | sRef_clearAliasState (errorRef, loc); | |
9367 | } | |
9368 | } | |
9369 | } | |
9370 | } | |
9371 | else if (unuseable) | |
9372 | { | |
9373 | if (optgenerror | |
9374 | (FLG_USEDEF, | |
9375 | message ("%q %q%qused in inconsistent state", | |
9376 | sRef_unparseKindName (errorRef), | |
9377 | sRef_unparseOpt (errorRef), | |
9378 | cstring_makeLiteral (errorMaybe ? "may be " : "")), | |
9379 | loc)) | |
9380 | { | |
9381 | sRef_showStateInconsistent (errorRef); | |
9382 | } | |
9383 | } | |
9384 | else | |
9385 | { | |
28bf4b0b | 9386 | DPRINTF (("HERE: %s", sRef_unparseFull (errorRef))); |
616915dd | 9387 | |
9388 | voptgenerror | |
9389 | (FLG_USEDEF, | |
9390 | message ("%q %q%qused before definition", | |
9391 | sRef_unparseKindName (errorRef), | |
9392 | sRef_unparseOpt (errorRef), | |
9393 | cstring_makeLiteral (errorMaybe ? "may be " : "")), | |
9394 | loc); | |
cd7d9b17 | 9395 | |
9396 | DPRINTF (("Error: %s", sRef_unparseFull (errorRef))); | |
616915dd | 9397 | } |
9398 | ||
9399 | sRef_setDefined (errorRef, loc); | |
9400 | ||
9401 | if (sRef_isAddress (errorRef)) | |
9402 | { | |
9403 | sRef_setDefined (sRef_getRootBase (errorRef), loc); | |
9404 | } | |
9405 | } /* end is error */ | |
9406 | } | |
9407 | } | |
9408 | ||
9409 | setCodePoint (); | |
9410 | } | |
9411 | ||
9412 | static void | |
28bf4b0b | 9413 | checkSafeUse (exprNode e, /*@exposed@*/ sRef s) |
616915dd | 9414 | { |
9415 | if (exprNode_isDefined (e) && sRef_isKnown (s)) | |
9416 | { | |
9417 | e->uses = sRefSet_insert (e->uses, s); | |
9418 | } | |
9419 | } | |
9420 | ||
9421 | static void | |
9422 | exprNode_checkSetAny (exprNode e, /*@dependent@*/ cstring name) | |
9423 | { | |
9424 | if (exprNode_isDefined (e)) | |
9425 | { | |
9426 | e->sets = sRefSet_insert (e->sets, sRef_makeUnconstrained (name)); | |
9427 | } | |
9428 | } | |
9429 | ||
9430 | void | |
28bf4b0b | 9431 | exprNode_checkSet (exprNode e, /*@exposed@*/ sRef s) |
616915dd | 9432 | { |
9433 | sRef defines = sRef_undefined; | |
9434 | ||
9435 | if (sRef_isValid (s) && !sRef_isNothing (s)) | |
9436 | { | |
9437 | uentry ue = sRef_getBaseUentry (s); | |
9438 | ||
9439 | if (uentry_isValid (ue)) | |
9440 | { | |
9441 | uentry_setLset (ue); | |
9442 | } | |
9443 | ||
9444 | if (!ynm_toBoolStrict (sRef_isWriteable (s))) | |
9445 | { | |
9446 | voptgenerror (FLG_USEDEF, | |
9447 | message ("Attempt to set unuseable storage: %q", | |
9448 | sRef_unparse (s)), | |
9449 | exprNode_loc (e)); | |
9450 | } | |
9451 | ||
9452 | if (sRef_isMeaningful (s)) | |
9453 | { | |
9454 | ||
9455 | if (sRef_isDead (s)) | |
9456 | { | |
9457 | sRef base = sRef_getBaseSafe (s); | |
9458 | ||
9459 | if (sRef_isValid (base) | |
9460 | && sRef_isDead (base)) | |
9461 | { | |
9462 | sRef_setPartial (s, exprNode_loc (e)); | |
9463 | } | |
9464 | ||
9465 | defines = s; /* okay - modifies for only param */ | |
9466 | } | |
9467 | else if (sRef_isPartial (s)) | |
9468 | { | |
9469 | sRef eref = exprNode_getSref (e); | |
9470 | ||
9471 | if (!sRef_isPartial (eref)) | |
9472 | { | |
9473 | /* | |
9474 | ** should do something different here??? | |
9475 | */ | |
9476 | ||
9477 | sRef_setDefinedComplete (eref, exprNode_loc (e)); | |
9478 | } | |
9479 | else | |
9480 | { | |
9481 | sRef_setPartialDefinedComplete (eref, exprNode_loc (e)); | |
9482 | } | |
9483 | ||
9484 | if (sRef_isMeaningful (eref)) | |
9485 | { | |
9486 | defines = eref; | |
9487 | } | |
9488 | else | |
9489 | { | |
9490 | defines = s; | |
9491 | } | |
9492 | } | |
9493 | else if (sRef_isAllocated (s)) | |
9494 | { | |
9495 | sRef eref = exprNode_getSref (e); | |
9496 | ||
9497 | ||
9498 | if (!sRef_isAllocated (eref)) | |
9499 | { | |
9500 | sRef_setDefinedComplete (eref, exprNode_loc (e)); | |
9501 | } | |
9502 | else | |
9503 | { | |
9504 | sRef base = sRef_getBaseSafe (eref); | |
9505 | ||
9506 | if (sRef_isValid (base)) | |
9507 | { | |
9508 | sRef_setPdefined (base, exprNode_loc (e)); | |
9509 | } | |
9510 | } | |
9511 | ||
9512 | defines = s; | |
9513 | } | |
9514 | else | |
9515 | { | |
9516 | sRef_setDefinedNCComplete (s, exprNode_loc (e)); | |
9517 | defines = s; | |
9518 | } | |
9519 | ||
9520 | } | |
9521 | else /* not meaningful...but still need to insert it */ | |
9522 | { | |
9523 | defines = s; | |
9524 | } | |
9525 | } | |
9526 | ||
9527 | if (exprNode_isDefined (e) && sRef_isValid (defines)) | |
9528 | { | |
9529 | e->sets = sRefSet_insert (e->sets, defines); | |
9530 | } | |
9531 | } | |
9532 | ||
9533 | void | |
28bf4b0b | 9534 | exprNode_checkMSet (exprNode e, /*@exposed@*/ sRef s) |
616915dd | 9535 | { |
9536 | if (sRef_isValid (s) && !sRef_isNothing (s)) | |
9537 | { | |
9538 | uentry ue = sRef_getBaseUentry (s); | |
9539 | ||
9540 | if (uentry_isValid (ue)) | |
9541 | { | |
9542 | uentry_setLset (ue); | |
9543 | } | |
9544 | ||
9545 | if (!ynm_toBoolStrict (sRef_isWriteable (s))) | |
9546 | { | |
9547 | voptgenerror (FLG_USEDEF, | |
9548 | message ("Attempt to set unuseable storage: %q", sRef_unparse (s)), | |
9549 | exprNode_loc (e)); | |
9550 | } | |
9551 | ||
9552 | if (sRef_isMeaningful (s)) | |
9553 | { | |
9554 | sRef_setDefinedComplete (s, exprNode_loc (e)); | |
9555 | } | |
9556 | ||
9557 | if (exprNode_isDefined (e)) | |
9558 | { | |
9559 | e->msets = sRefSet_insert (e->msets, s); | |
9560 | } | |
9561 | } | |
9562 | } | |
9563 | ||
9564 | static void | |
9565 | checkUnspecCall (/*@notnull@*/ /*@dependent@*/ exprNode fcn, uentryList params, exprNodeList args) | |
9566 | { | |
9567 | checkAnyCall (fcn, cstring_undefined, params, args, | |
9568 | FALSE, sRefSet_undefined, FALSE, 0); | |
9569 | } | |
9570 | ||
9571 | static void | |
9572 | checkOneArg (uentry ucurrent, /*@notnull@*/ exprNode current, | |
9573 | /*@dependent@*/ exprNode fcn, bool isSpec, int argno, int totargs) | |
9574 | { | |
9575 | setCodePoint (); | |
9576 | ||
9577 | if (uentry_isYield (ucurrent)) | |
9578 | { | |
9579 | sRef_setDefined (exprNode_getSref (current), exprNode_loc (current)); | |
9580 | exprNode_checkSet (current, current->sref); | |
9581 | } | |
9582 | else | |
9583 | { | |
9584 | if (uentry_isSefParam (ucurrent)) | |
9585 | { | |
9586 | sRefSet sets = current->sets; | |
9587 | sRef ref = exprNode_getSref (current); | |
9588 | ||
9589 | if (sRef_isMacroParamRef (ref)) | |
9590 | { | |
9591 | uentry ue = sRef_getUentry (ref); | |
9592 | ||
9593 | if (!uentry_isSefParam (ue)) | |
9594 | { | |
9595 | voptgenerror | |
9596 | (FLG_SEFPARAMS, | |
9597 | message | |
9598 | ("Parameter %d to %s is declared sef, but " | |
9599 | "the argument is a macro parameter declared " | |
9600 | "without sef: %s", | |
9601 | argno, exprNode_unparse (fcn), | |
9602 | exprNode_unparse (current)), | |
9603 | exprNode_loc (current)); | |
9604 | } | |
9605 | } | |
9606 | ||
9607 | if (!sRefSet_isEmpty (sets)) | |
9608 | { | |
9609 | sRefSet reported = sRefSet_undefined; | |
9610 | ||
9611 | sRefSet_realElements (current->sets, el) | |
9612 | { | |
9613 | if (sRefSet_isSameNameMember (reported, el)) | |
9614 | { | |
9615 | ; /* don't report again */ | |
9616 | } | |
9617 | else | |
9618 | { | |
9619 | if (sRef_isUnconstrained (el)) | |
9620 | { | |
9621 | voptgenerror | |
9622 | (FLG_SEFUNSPEC, | |
9623 | message | |
9624 | ("Parameter %d to %s is declared sef, but " | |
9625 | "the argument calls unconstrained function %s " | |
9626 | "(no guarantee it will not modify something): %s", | |
9627 | argno, exprNode_unparse (fcn), | |
9628 | sRef_unconstrainedName (el), | |
9629 | exprNode_unparse (current)), | |
9630 | exprNode_loc (current)); | |
9631 | } | |
9632 | else | |
9633 | { | |
9634 | voptgenerror | |
9635 | (FLG_SEFPARAMS, | |
9636 | message | |
9637 | ("Parameter %d to %s is declared sef, but " | |
9638 | "the argument may modify %q: %s", | |
9639 | argno, exprNode_unparse (fcn), | |
9640 | sRef_unparse (el), | |
9641 | exprNode_unparse (current)), | |
9642 | exprNode_loc (current)); | |
9643 | } | |
9644 | } | |
9645 | } end_sRefSet_realElements; | |
9646 | } | |
9647 | } | |
9648 | ||
9649 | checkPassTransfer (current, ucurrent, isSpec, fcn, argno, totargs); | |
9650 | exprNode_mergeUSs (fcn, current); | |
9651 | } | |
9652 | } | |
9653 | ||
9654 | static void | |
9655 | checkAnyCall (/*@dependent@*/ exprNode fcn, | |
9656 | /*@dependent@*/ cstring fname, | |
9657 | uentryList pn, | |
9658 | exprNodeList args, | |
9659 | bool hasMods, sRefSet mods, | |
9660 | bool isSpec, | |
9661 | int specialArgs) | |
9662 | { | |
9663 | int paramno = 0; | |
9664 | int nargs = exprNodeList_size (args); | |
9665 | ||
9666 | setCodePoint (); | |
9667 | ||
9668 | /* | |
9669 | ** concat all args ud's to f, add each arg sref as a use unless | |
9670 | ** it was specified as "out", in which case it is a def. | |
9671 | */ | |
9672 | ||
9673 | uentryList_reset (pn); | |
9674 | ||
9675 | /* | |
9676 | ** aliasing checks: | |
9677 | ** | |
9678 | ** if paramn is only or unique, no other arg may alias argn | |
9679 | */ | |
9680 | ||
9681 | exprNodeList_elements (args, current) | |
9682 | { | |
9683 | paramno++; | |
9684 | ||
9685 | if (exprNode_isDefined (current)) | |
9686 | { | |
9687 | if ((!uentryList_isUndefined (pn) && !uentryList_isFinished (pn))) | |
9688 | { | |
9689 | uentry ucurrent = uentryList_current (pn); | |
9690 | ||
9691 | if (specialArgs == 0 | |
9692 | || (paramno < specialArgs)) | |
9693 | { | |
28bf4b0b | 9694 | checkOneArg (ucurrent, current, fcn, isSpec, paramno, nargs); |
616915dd | 9695 | |
9696 | if (context_maybeSet (FLG_ALIASUNIQUE)) | |
9697 | { | |
9698 | if (uentry_isOnly (ucurrent) | |
9699 | || uentry_isUnique (ucurrent)) | |
9700 | { | |
9701 | checkUniqueParams (fcn, current, args, | |
9702 | paramno, ucurrent); | |
9703 | } | |
9704 | } | |
9705 | } | |
9706 | } | |
9707 | else /* uentry is undefined */ | |
9708 | { | |
9709 | if (specialArgs == 0) | |
9710 | { | |
9711 | exprNode_checkUseParam (current); | |
9712 | } | |
9713 | ||
9714 | exprNode_mergeUSs (fcn, current); | |
9715 | } | |
9716 | } | |
9717 | uentryList_advanceSafe (pn); | |
9718 | } end_exprNodeList_elements; | |
9719 | ||
9720 | if (hasMods) | |
9721 | { | |
9722 | setCodePoint (); | |
9723 | ||
9724 | sRefSet_allElements (mods, s) | |
9725 | { | |
9726 | sRef fb; | |
9727 | sRef rb = sRef_getRootBase (s); | |
9728 | ||
28bf4b0b | 9729 | if (sRef_isFileOrGlobalScope (rb)) |
616915dd | 9730 | { |
9731 | context_usedGlobal (rb); | |
9732 | } | |
9733 | ||
9734 | fb = sRef_fixBaseParam (s, args); | |
9735 | ||
9736 | if (!sRef_isMacroParamRef (fb)) | |
9737 | { | |
9738 | if (sRef_isNothing (fb)) | |
9739 | { | |
9740 | ; | |
9741 | } | |
9742 | else | |
9743 | { | |
9744 | if (sRef_isValid (fb)) | |
9745 | { | |
9746 | uentry ue = sRef_getBaseUentry (s); | |
9747 | ||
9748 | if (uentry_isValid (ue)) | |
9749 | { | |
9750 | uentry_setLset (ue); | |
9751 | } | |
9752 | } | |
9753 | ||
9754 | fcn->sets = sRefSet_insert (fcn->sets, fb); | |
9755 | } | |
9756 | } | |
9757 | sRef_clearDerivedComplete (s); | |
9758 | } end_sRefSet_allElements; | |
9759 | ||
9760 | setCodePoint (); | |
9761 | } | |
9762 | else | |
9763 | { | |
9764 | if (context_hasMods ()) | |
9765 | { | |
9766 | if (context_maybeSet (FLG_MODUNCON)) | |
9767 | { | |
9768 | voptgenerror | |
9769 | (FLG_MODUNCON, | |
9770 | message ("Undetected modification possible " | |
9771 | "from call to unconstrained function %s: %s", | |
9772 | fname, | |
9773 | exprNode_unparse (fcn)), | |
9774 | exprNode_loc (fcn)); | |
9775 | } | |
9776 | } | |
9777 | else | |
9778 | { | |
9779 | if (context_maybeSet (FLG_MODUNCONNOMODS) | |
9780 | && !(context_inIterDef () || context_inIterEnd ())) | |
9781 | { | |
9782 | voptgenerror | |
9783 | (FLG_MODUNCONNOMODS, | |
9784 | message ("Undetected modification possible " | |
9785 | "from call to unconstrained function %s: %s", | |
9786 | fname, | |
9787 | exprNode_unparse (fcn)), | |
9788 | exprNode_loc (fcn)); | |
9789 | } | |
9790 | } | |
9791 | ||
9792 | exprNode_checkSetAny (fcn, fname); | |
9793 | } | |
9794 | } | |
9795 | ||
9796 | void exprNode_checkUseParam (exprNode current) | |
9797 | { | |
9798 | if (exprNode_isDefined (current)) | |
9799 | { | |
9800 | exprNode_checkUse (current, current->sref, current->loc); | |
9801 | } | |
9802 | } | |
9803 | ||
9804 | static ctype | |
9805 | checkNumerics (ctype tr1, ctype tr2, ctype te1, ctype te2, | |
9806 | /*@notnull@*/ exprNode e1, /*@notnull@*/ exprNode e2, | |
9807 | lltok op) | |
9808 | { | |
9809 | ctype ret = tr1; | |
9810 | ||
9811 | if (!ctype_match (tr1, tr2)) | |
9812 | { | |
9813 | if ((ctype_isRealInt (tr1) || ctype_isReal (tr1)) && | |
9814 | (ctype_isRealInt (tr2) || ctype_isReal (tr2))) | |
9815 | { | |
9816 | ; | |
9817 | } | |
9818 | else | |
9819 | { | |
9820 | (void) gentypeerror | |
9821 | (tr1, e1, tr2, e2, | |
9822 | message ("Incompatible types for %s (%s, %s): %s %s %s", | |
9823 | lltok_unparse (op), | |
9824 | ctype_unparse (te1), | |
9825 | ctype_unparse (te2), | |
9826 | exprNode_unparse (e1), lltok_unparse (op), | |
9827 | exprNode_unparse (e2)), | |
9828 | e1->loc); | |
9829 | } | |
9830 | ret = ctype_unknown; | |
9831 | } | |
9832 | else | |
9833 | { | |
9834 | if (ctype_isForceRealNumeric (&tr1) && ctype_isForceRealNumeric (&tr2)) | |
9835 | { | |
9836 | ret = ctype_resolveNumerics (tr1, tr2); | |
9837 | } | |
9838 | else if (!context_msgStrictOps ()) | |
9839 | { | |
9840 | if (ctype_isPointer (tr1)) | |
9841 | { | |
9842 | if (ctype_isPointer (tr2) && !exprNode_isNullValue (e2)) | |
9843 | { | |
9844 | ret = ctype_int; | |
9845 | } | |
9846 | else if (ctype_isInt (tr2)) | |
9847 | { | |
9848 | ret = te1; | |
9849 | } | |
9850 | else | |
9851 | { | |
9852 | ret = ctype_unknown; | |
9853 | } | |
9854 | } | |
9855 | else if (ctype_isPointer (tr2)) | |
9856 | { | |
9857 | if (ctype_isPointer (tr1)) | |
9858 | { | |
9859 | ret = ctype_int; | |
9860 | } | |
9861 | else if (ctype_isInt (tr1)) | |
9862 | { | |
9863 | ret = te2; | |
9864 | } | |
9865 | else | |
9866 | { | |
9867 | ret = ctype_unknown; | |
9868 | } | |
9869 | } | |
9870 | else | |
9871 | { | |
9872 | ret = ctype_resolveNumerics (tr1, tr2); | |
9873 | } | |
9874 | } | |
9875 | else | |
9876 | { | |
9877 | int opid = lltok_getTok (op); | |
9878 | bool comparop = (opid == EQ_OP || opid == NE_OP | |
9879 | || opid == TLT || opid == TGT | |
9880 | || opid == LE_OP || opid == GE_OP); | |
9881 | ||
9882 | if (!ctype_isNumeric (tr1) && !ctype_isNumeric (tr2)) | |
9883 | { | |
9884 | if (comparop | |
9885 | && ((ctype_isEnum (tr1) && ctype_isEnum (tr2)) | |
9886 | || (ctype_isBool (tr1) && ctype_isBool (tr2)) | |
9887 | || (ctype_isChar (tr1) && ctype_isChar (tr2)))) | |
9888 | { | |
9889 | ; /* no error */ | |
9890 | } | |
9891 | else | |
9892 | { | |
9893 | if (ctype_sameName (te1, te2)) | |
9894 | { | |
9895 | voptgenerror | |
9896 | (FLG_STRICTOPS, | |
9897 | message ("Operands of %s are non-numeric (%t): %s %s %s", | |
9898 | lltok_unparse (op), te1, | |
9899 | exprNode_unparse (e1), lltok_unparse (op), | |
9900 | exprNode_unparse (e2)), | |
9901 | e1->loc); | |
9902 | } | |
9903 | else | |
9904 | { | |
9905 | voptgenerror | |
9906 | (FLG_STRICTOPS, | |
9907 | message ("Operands of %s are non-numerics (%t, %t): %s %s %s", | |
9908 | lltok_unparse (op), te1, te2, | |
9909 | exprNode_unparse (e1), lltok_unparse (op), | |
9910 | exprNode_unparse (e2)), | |
9911 | e1->loc); | |
9912 | } | |
9913 | } | |
9914 | } | |
9915 | else if (!ctype_isNumeric (tr1)) | |
9916 | { | |
9917 | voptgenerror | |
9918 | (FLG_STRICTOPS, | |
9919 | message ("Right operand of %s is non-numeric (%t): %s %s %s", | |
9920 | lltok_unparse (op), te1, | |
9921 | exprNode_unparse (e1), lltok_unparse (op), | |
9922 | exprNode_unparse (e2)), | |
9923 | e1->loc); | |
9924 | } | |
9925 | else | |
9926 | { | |
9927 | if (!ctype_isNumeric (tr2)) | |
9928 | { | |
9929 | voptgenerror | |
9930 | (FLG_STRICTOPS, | |
9931 | message ("Left operand of %s is non-numeric (%t): %s %s %s", | |
9932 | lltok_unparse (op), te2, | |
9933 | exprNode_unparse (e1), lltok_unparse (op), | |
9934 | exprNode_unparse (e2)), | |
9935 | e2->loc); | |
9936 | } | |
9937 | } | |
9938 | ||
9939 | ret = ctype_unknown; | |
9940 | } | |
9941 | } | |
9942 | ||
9943 | return ret; | |
9944 | } | |
9945 | ||
9946 | static void | |
9947 | abstractOpError (ctype tr1, ctype tr2, lltok op, | |
9948 | /*@notnull@*/ exprNode e1, /*@notnull@*/ exprNode e2, | |
9949 | fileloc loc1, fileloc loc2) | |
9950 | { | |
9951 | if (ctype_isRealAbstract (tr1) && ctype_isRealAbstract (tr2)) | |
9952 | { | |
9953 | if (ctype_match (tr1, tr2)) | |
9954 | { | |
9955 | voptgenerror | |
9956 | (FLG_ABSTRACT, | |
9957 | message ("Operands of %s are abstract type (%t): %s %s %s", | |
9958 | lltok_unparse (op), tr1, | |
9959 | exprNode_unparse (e1), lltok_unparse (op), exprNode_unparse (e2)), | |
9960 | loc1); | |
9961 | } | |
9962 | else | |
9963 | { | |
9964 | voptgenerror | |
9965 | (FLG_ABSTRACT, | |
9966 | message ("Operands of %s are abstract types (%t, %t): %s %s %s", | |
9967 | lltok_unparse (op), tr1, tr2, | |
9968 | exprNode_unparse (e1), lltok_unparse (op), exprNode_unparse (e2)), | |
9969 | loc1); | |
9970 | } | |
9971 | } | |
9972 | else if (ctype_isRealAbstract (tr1)) | |
9973 | { | |
9974 | voptgenerror | |
9975 | (FLG_ABSTRACT, | |
9976 | message ("Left operand of %s is abstract type (%t): %s %s %s", | |
9977 | lltok_unparse (op), tr1, | |
9978 | exprNode_unparse (e1), lltok_unparse (op), exprNode_unparse (e2)), | |
9979 | loc1); | |
9980 | } | |
9981 | else | |
9982 | { | |
9983 | if (ctype_isRealAbstract (tr2)) | |
9984 | { | |
9985 | voptgenerror | |
9986 | (FLG_ABSTRACT, | |
9987 | message ("Right operand of %s is abstract type (%t): %s %s %s", | |
9988 | lltok_unparse (op), tr2, | |
9989 | exprNode_unparse (e1), lltok_unparse (op), exprNode_unparse (e2)), | |
9990 | loc2); | |
9991 | } | |
9992 | } | |
9993 | } | |
9994 | ||
9995 | /* | |
9996 | ** e1 <= e2 | |
9997 | ** | |
9998 | ** requies e1 and e2 and not error exprNode's. | |
9999 | ** | |
10000 | ** Checks: | |
10001 | ** | |
10002 | ** If e1 is a component of an abstract type, and e2 is mutable and client-visible, | |
10003 | ** the rep of the abstract type is exposed. | |
10004 | ** | |
10005 | ** The order is very important: | |
10006 | ** | |
10007 | ** check rep expose (move into check transfer) | |
10008 | ** check transfer | |
10009 | ** setup aliases | |
10010 | */ | |
10011 | ||
10012 | /* | |
10013 | ** This isn't really a sensible procedure, but the indententation | |
10014 | ** was getting too deep. | |
10015 | */ | |
10016 | ||
10017 | static void | |
10018 | checkOneRepExpose (sRef ysr, sRef base, | |
10019 | /*@notnull@*/ exprNode e1, | |
10020 | /*@notnull@*/ exprNode e2, ctype ct, | |
10021 | sRef s2b) | |
10022 | { | |
10023 | if (!(sRef_isOnly (ysr) || sRef_isKeep (ysr) | |
08eb3d0e | 10024 | || sRef_isOwned (ysr) |
10025 | || sRef_isExposed (ysr))) | |
616915dd | 10026 | { |
08eb3d0e | 10027 | if (sRef_isAnyParam (base) && !sRef_isExposed (base) |
10028 | && !sRef_isObserver (base)) /* evans 2001-07-11: added isObserver */ | |
10029 | ||
616915dd | 10030 | { |
10031 | if (sRef_isIReference (ysr)) | |
10032 | { | |
10033 | if (sRef_sameName (base, sRef_getRootBase (e2->sref))) | |
10034 | { | |
10035 | voptgenerror | |
10036 | (FLG_ASSIGNEXPOSE, | |
10037 | message | |
10038 | ("Assignment of mutable component of parameter %q " | |
10039 | "to component of abstract " | |
10040 | "type %s exposes rep: %s = %s", | |
10041 | sRef_unparse (base), | |
10042 | ctype_unparse (ct), | |
10043 | exprNode_unparse (e1), exprNode_unparse (e2)), | |
10044 | e1->loc); | |
10045 | } | |
10046 | else | |
10047 | { | |
10048 | voptgenerror | |
10049 | (FLG_ASSIGNEXPOSE, | |
10050 | message | |
10051 | ("Assignment of mutable component of parameter %q " | |
10052 | "(through alias %q) to component of abstract " | |
10053 | "type %s exposes rep: %s = %s", | |
10054 | sRef_unparse (base), | |
10055 | sRef_unparse (e2->sref), | |
10056 | ctype_unparse (ct), | |
10057 | exprNode_unparse (e1), exprNode_unparse (e2)), | |
10058 | e1->loc); | |
10059 | } | |
10060 | } | |
10061 | else | |
10062 | { | |
10063 | if (sRef_sameName (base, sRef_getRootBase (e2->sref))) | |
10064 | { | |
10065 | voptgenerror | |
10066 | (FLG_ASSIGNEXPOSE, | |
10067 | message ("Assignment of mutable parameter %q " | |
10068 | "to component of abstract type %s " | |
10069 | "exposes rep: %s = %s", | |
10070 | sRef_unparse (base), | |
10071 | ctype_unparse (ct), | |
10072 | exprNode_unparse (e1), | |
10073 | exprNode_unparse (e2)), | |
10074 | e1->loc); | |
10075 | } | |
10076 | else | |
10077 | { | |
10078 | voptgenerror | |
10079 | (FLG_ASSIGNEXPOSE, | |
10080 | message ("Assignment of mutable parameter %q " | |
10081 | "(through alias %q) to " | |
10082 | "component of abstract type %s exposes " | |
10083 | "rep: %s = %s", | |
10084 | sRef_unparse (base), | |
10085 | sRef_unparse (e2->sref), | |
10086 | ctype_unparse (ct), | |
10087 | exprNode_unparse (e1), | |
10088 | exprNode_unparse (e2)), | |
10089 | e1->loc); | |
10090 | } | |
10091 | } | |
10092 | } | |
10093 | ||
28bf4b0b | 10094 | if (sRef_isFileOrGlobalScope (s2b)) |
616915dd | 10095 | { |
10096 | if (sRef_sameName (base, sRef_getRootBase (e2->sref))) | |
10097 | { | |
10098 | voptgenerror | |
10099 | (FLG_REPEXPOSE, | |
10100 | message ("Assignment of global %q " | |
10101 | "to component of " | |
10102 | "abstract type %s exposes rep: %s = %s", | |
10103 | sRef_unparse (base), | |
10104 | ctype_unparse (ct), | |
10105 | exprNode_unparse (e1), exprNode_unparse (e2)), | |
10106 | e1->loc); | |
10107 | } | |
10108 | else | |
10109 | { | |
10110 | voptgenerror | |
10111 | (FLG_REPEXPOSE, | |
10112 | message ("Assignment of global %q (through alias %q) " | |
10113 | "to component of " | |
10114 | "abstract type %s exposes rep: %s = %s", | |
10115 | sRef_unparse (base), | |
10116 | sRef_unparse (e2->sref), | |
10117 | ctype_unparse (ct), | |
10118 | exprNode_unparse (e1), exprNode_unparse (e2)), | |
10119 | e1->loc); | |
10120 | } | |
10121 | } | |
10122 | } | |
10123 | } | |
10124 | ||
10125 | static void | |
10126 | doAssign (/*@notnull@*/ exprNode e1, /*@notnull@*/ exprNode e2, bool isInit) | |
10127 | { | |
10128 | if (ctype_isRealFunction (exprNode_getType (e1)) | |
10129 | && !ctype_isRealPointer (exprNode_getType (e1))) | |
10130 | { | |
10131 | voptgenerror | |
10132 | (FLG_TYPE, | |
10133 | message ("Invalid left-hand side of assignment (function type %s): %s", | |
10134 | ctype_unparse (exprNode_getType (e1)), | |
10135 | exprNode_unparse (e1)), | |
10136 | e1->loc); | |
10137 | } | |
10138 | ||
10139 | if (context_getFlag (FLG_ASSIGNEXPOSE) && ctype_isMutable (e2->typ)) | |
10140 | { | |
10141 | ctype t2 = exprNode_getType (e2); | |
10142 | sRef sr = sRef_getRootBase (e1->sref); | |
10143 | ctype ct = sRef_getType (sr); | |
10144 | ||
10145 | if (ctype_isAbstract (t2) | |
10146 | && !(uentry_isMutableDatatype (usymtab_getTypeEntry (ctype_typeId (t2))))) | |
10147 | { | |
10148 | /* it is immutable, okay to reference */ | |
10149 | goto donerepexpose; | |
10150 | } | |
10151 | ||
10152 | if (ctype_isAbstract (ct) && sRef_isIReference (e1->sref)) | |
10153 | { | |
10154 | sRef s2b = sRef_getRootBase (e2->sref); | |
10155 | sRef s1 = e1->sref; | |
10156 | sRef s1b = sRef_getRootBase (s1); | |
10157 | sRefSet aliases; | |
10158 | ||
10159 | aliases = usymtab_canAlias (e2->sref); | |
10160 | ||
10161 | if (!sRef_similar (s2b, s1b) | |
10162 | && !sRef_isExposed (s1) | |
10163 | && !(sRef_isOnly (s2b) || sRef_isKeep (s2b) || sRef_isExposed (s2b))) | |
10164 | { | |
10165 | if (sRef_isAnyParam (s2b) && !sRef_isOnly (s2b) | |
10166 | && !sRef_isOwned (s2b) && !sRef_isKeep (s2b) | |
10167 | && !sRef_isExposed (s2b)) | |
10168 | { | |
10169 | if (sRef_isIReference (e2->sref)) | |
10170 | { | |
10171 | voptgenerror | |
10172 | (FLG_ASSIGNEXPOSE, | |
10173 | message | |
10174 | ("Assignment of mutable component of parameter %q " | |
10175 | "to component of abstract type %s exposes rep: %s = %s", | |
10176 | sRef_unparse (s2b), | |
10177 | ctype_unparse (ct), | |
10178 | exprNode_unparse (e1), exprNode_unparse (e2)), | |
10179 | e1->loc); | |
10180 | } | |
10181 | else | |
10182 | { | |
10183 | voptgenerror | |
10184 | (FLG_ASSIGNEXPOSE, | |
10185 | message ("Assignment of mutable parameter %q to " | |
10186 | "component of abstract type %s exposes rep: %s = %s", | |
10187 | sRef_unparse (s2b), | |
10188 | ctype_unparse (ct), | |
10189 | exprNode_unparse (e1), exprNode_unparse (e2)), | |
10190 | e1->loc); | |
10191 | } | |
10192 | } | |
10193 | ||
28bf4b0b | 10194 | if (sRef_isFileOrGlobalScope (s2b)) |
616915dd | 10195 | { |
10196 | voptgenerror | |
10197 | (FLG_ASSIGNEXPOSE, | |
10198 | message ("Assignment of global %q to component of " | |
10199 | "abstract type %s exposes rep: %s = %s", | |
10200 | sRef_unparse (s2b), | |
10201 | ctype_unparse (ct), | |
10202 | exprNode_unparse (e1), exprNode_unparse (e2)), | |
10203 | e1->loc); | |
10204 | } | |
10205 | ||
10206 | sRefSet_realElements (aliases, ysr) | |
10207 | { | |
10208 | sRef base = sRef_getRootBase (ysr); | |
10209 | ||
10210 | if (sRef_similar (ysr, s2b) || sRef_similar (s1b, base) | |
10211 | || sRef_sameName (base, s1b)) | |
10212 | { | |
10213 | ; /* error already reported or same sref */ | |
10214 | } | |
10215 | else | |
10216 | { | |
10217 | checkOneRepExpose (ysr, base, e1, e2, ct, s2b); | |
10218 | } | |
10219 | } end_sRefSet_realElements; | |
10220 | } | |
10221 | sRefSet_free (aliases); | |
10222 | } | |
10223 | } | |
10224 | ||
10225 | donerepexpose: | |
10226 | ||
10227 | /* | |
10228 | ** function variables don't really work... | |
10229 | */ | |
10230 | ||
10231 | if (!ctype_isFunction (ctype_realType (e2->typ))) | |
10232 | { | |
10233 | if (isInit) | |
10234 | { | |
28bf4b0b | 10235 | DPRINTF (("Check init: %s / %s", |
10236 | exprNode_unparse (e1), exprNode_unparse (e2))); | |
616915dd | 10237 | checkInitTransfer (e1, e2); |
10238 | } | |
10239 | else | |
10240 | { | |
10241 | checkAssignTransfer (e1, e2); | |
10242 | } | |
10243 | } | |
10244 | else | |
10245 | { | |
10246 | sRef fref = e2->sref; | |
10247 | ||
10248 | sRef_setDefState (e1->sref, sRef_getDefState (fref), e1->loc); | |
10249 | sRef_setNullState (e1->sref, sRef_getNullState (fref), e1->loc); | |
10250 | ||
10251 | /* Need to typecheck the annotation on the parameters */ | |
10252 | ||
10253 | if (ctype_isRealFunction (e1->typ)) { | |
10254 | uentryList e1p = ctype_argsFunction (ctype_realType (e1->typ)); | |
10255 | uentryList e2p = ctype_argsFunction (ctype_realType (e2->typ)); | |
10256 | ||
10257 | if (!uentryList_isMissingParams (e1p) | |
10258 | && !uentryList_isMissingParams (e2p) | |
10259 | && uentryList_size (e1p) > 0) { | |
10260 | if (uentryList_size (e1p) == uentryList_size (e2p)) { | |
10261 | int n = 0; | |
10262 | ||
10263 | uentryList_elements (e1p, el1) { | |
10264 | uentry el2; | |
10265 | ||
10266 | el2 = uentryList_getN (e2p, n); | |
10267 | n++; | |
10268 | uentry_checkMatchParam (el1, el2, n, e2); | |
10269 | } end_uentryList_elements; | |
10270 | } | |
10271 | } | |
10272 | } | |
10273 | } | |
10274 | ||
28bf4b0b | 10275 | if (isInit && sRef_isFileOrGlobalScope (e1->sref)) |
616915dd | 10276 | { |
10277 | ; | |
10278 | } | |
10279 | else | |
10280 | { | |
28bf4b0b | 10281 | DPRINTF (("Update aliases: %s / %s", exprNode_unparse (e1), exprNode_unparse (e2))); |
616915dd | 10282 | updateAliases (e1, e2); |
10283 | } | |
616915dd | 10284 | } |
10285 | ||
10286 | static void | |
10287 | checkMacroParen (exprNode e) | |
10288 | { | |
10289 | if (exprNode_isError (e) || e->kind == XPR_CAST) | |
10290 | { | |
10291 | ; | |
10292 | } | |
10293 | else | |
10294 | { | |
10295 | if (sRef_isUnsafe (e->sref) && !exprNode_isInParens (e)) | |
10296 | { | |
10297 | voptgenerror | |
10298 | (FLG_MACROPARENS, | |
10299 | message ("Macro parameter used without parentheses: %s", | |
10300 | exprNode_unparse (e)), | |
10301 | e->loc); | |
10302 | } | |
10303 | } | |
10304 | } | |
10305 | ||
10306 | static void | |
10307 | reflectNullTest (/*@notnull@*/ exprNode e, bool isnull) | |
10308 | { | |
10309 | if (isnull) | |
10310 | { | |
10311 | e->guards = guardSet_addTrueGuard (e->guards, e->sref); | |
10312 | } | |
10313 | else | |
10314 | { | |
10315 | e->guards = guardSet_addFalseGuard (e->guards, e->sref); | |
10316 | } | |
10317 | } | |
10318 | ||
10319 | /* | |
10320 | ** e1 <= e2 | |
10321 | ** | |
10322 | ** if e2 is a parameter or global derived location which | |
10323 | ** can be modified (that is, e2 is a mutable abstract type, | |
10324 | ** or a derived pointer), then e1 can alias e2. | |
10325 | ** | |
10326 | ** e1 can alias everything which e2 can alias. | |
10327 | ** | |
10328 | ** Also, if e1 is guarded, remove from guard sets! | |
10329 | */ | |
10330 | ||
10331 | static void updateAliases (/*@notnull@*/ exprNode e1, /*@notnull@*/ exprNode e2) | |
10332 | { | |
10333 | if (!context_inProtectVars ()) | |
10334 | { | |
10335 | /* | |
10336 | ** depends on types of e1 and e2 | |
10337 | */ | |
10338 | ||
10339 | sRef s1 = e1->sref; | |
10340 | sRef s2 = e2->sref; | |
10341 | ctype t1 = exprNode_getType (e1); | |
10342 | ||
10343 | /* handle pointer sRefs, record fields, arrays, etc... */ | |
10344 | ||
10345 | if (!ctype_isRealSU (t1)) | |
10346 | { | |
28bf4b0b | 10347 | DPRINTF (("Copying real! %s", ctype_unparse (t1))); |
616915dd | 10348 | sRef_copyRealDerivedComplete (s1, s2); |
10349 | } | |
28bf4b0b | 10350 | else |
10351 | { | |
10352 | /* | |
10353 | ** Fields should alias | |
10354 | */ | |
10355 | ||
10356 | DPRINTF (("Not COPYING!: %s", ctype_unparse (t1))); | |
10357 | } | |
616915dd | 10358 | |
10359 | if (ctype_isMutable (t1) && sRef_isKnown (s1)) | |
10360 | { | |
10361 | usymtab_clearAlias (s1); | |
10362 | usymtab_addMustAlias (s1, s2); | |
28bf4b0b | 10363 | DPRINTF (("Add must alias: %s / %s", sRef_unparse (s1), sRef_unparse (s2))); |
10364 | } | |
10365 | else | |
10366 | { | |
10367 | DPRINTF (("Not mutable: %s", ctype_unparse (t1))); | |
616915dd | 10368 | } |
10369 | ||
10370 | if (sRef_possiblyNull (s1) && usymtab_isGuarded (s1)) | |
10371 | { | |
10372 | usymtab_unguard (s1); | |
10373 | } | |
10374 | } | |
10375 | } | |
10376 | ||
10377 | exprNode exprNode_updateLocation (/*@returned@*/ exprNode e, /*@temp@*/ fileloc loc) | |
10378 | { | |
10379 | if (exprNode_isDefined (e)) | |
10380 | { | |
10381 | e->loc = fileloc_update (e->loc, loc); | |
10382 | } | |
10383 | else | |
10384 | { | |
10385 | e = exprNode_createLoc (ctype_unknown, fileloc_copy (loc)); | |
10386 | } | |
10387 | ||
10388 | return (e); | |
10389 | } | |
10390 | ||
10391 | static void checkUniqueParams (exprNode fcn, | |
10392 | /*@notnull@*/ exprNode current, | |
10393 | exprNodeList args, | |
10394 | int paramno, uentry ucurrent) | |
10395 | { | |
10396 | int iparamno = 0; | |
10397 | sRef thisref = exprNode_getSref (current); | |
10398 | ||
10399 | /* | |
10400 | ** Check if any argument could match this argument. | |
10401 | */ | |
10402 | ||
10403 | exprNodeList_elements (args, icurrent) | |
10404 | { | |
10405 | iparamno++; | |
10406 | ||
10407 | if (iparamno != paramno) | |
10408 | { | |
10409 | sRef sr = exprNode_getSref (icurrent); | |
10410 | ||
10411 | if (sRef_similarRelaxed (thisref, sr)) | |
10412 | { | |
10413 | if (!sRef_isConst (thisref) && !sRef_isConst (sr)) | |
10414 | { | |
10415 | voptgenerror | |
10416 | (FLG_ALIASUNIQUE, | |
10417 | message | |
10418 | ("Parameter %d (%s) to function %s is declared %s but " | |
10419 | "is aliased by parameter %d (%s)", | |
10420 | paramno, | |
10421 | exprNode_unparse (current), | |
10422 | exprNode_unparse (fcn), | |
10423 | alkind_unparse (uentry_getAliasKind (ucurrent)), | |
10424 | iparamno, exprNode_unparse (icurrent)), | |
10425 | current->loc); | |
10426 | } | |
10427 | } | |
10428 | else | |
10429 | { | |
10430 | sRefSet aliases = usymtab_canAlias (sr); | |
10431 | ||
10432 | sRefSet_allElements (aliases, asr) | |
10433 | { | |
10434 | if (ctype_isUnknown (sRef_getType (thisref))) | |
10435 | { | |
10436 | sRef_setType (thisref, uentry_getType (ucurrent)); | |
10437 | } | |
10438 | ||
10439 | if (sRef_similarRelaxed (thisref, asr)) | |
10440 | { | |
10441 | if (sRef_isExternal (asr)) | |
10442 | { | |
10443 | if (sRef_isLocalState (thisref)) | |
10444 | { | |
10445 | ; /* okay */ | |
10446 | } | |
10447 | else | |
10448 | { | |
10449 | sRef base = sRef_getRootBase (asr); | |
10450 | ||
10451 | if (!sRef_similar (sRef_getBase (asr), thisref)) | |
10452 | { | |
10453 | if (sRef_isUnique (base) || sRef_isOnly (base) | |
10454 | || sRef_isKept (base) | |
10455 | || (sRef_isAddress (asr) && sRef_isLocalVar (base)) | |
10456 | || (sRef_isAddress (thisref) | |
10457 | && sRef_isLocalVar (sRef_getRootBase (thisref)))) | |
10458 | { | |
10459 | ; /* okay, no error */ | |
10460 | } | |
10461 | else | |
10462 | { | |
10463 | voptgenerror | |
10464 | (FLG_MAYALIASUNIQUE, | |
10465 | message | |
10466 | ("Parameter %d (%s) to function %s is declared %s but " | |
10467 | "may be aliased externally by parameter %d (%s)", | |
10468 | paramno, | |
10469 | exprNode_unparse (current), | |
10470 | exprNode_unparse (fcn), | |
10471 | alkind_unparse (uentry_getAliasKind (ucurrent)), | |
10472 | iparamno, exprNode_unparse (icurrent)), | |
10473 | current->loc); | |
10474 | } | |
10475 | } | |
10476 | } | |
10477 | } | |
10478 | else | |
10479 | { | |
10480 | voptgenerror | |
10481 | (FLG_ALIASUNIQUE, | |
10482 | message | |
10483 | ("Parameter %d (%s) to function %s is declared %s but " | |
10484 | "is aliased externally by parameter %d (%s) through " | |
10485 | "alias %q", | |
10486 | paramno, | |
10487 | exprNode_unparse (current), | |
10488 | exprNode_unparse (fcn), | |
10489 | alkind_unparse (uentry_getAliasKind (ucurrent)), | |
10490 | iparamno, exprNode_unparse (icurrent), | |
10491 | sRef_unparse (asr)), | |
10492 | current->loc); | |
10493 | } | |
10494 | } | |
10495 | } end_sRefSet_allElements; | |
10496 | sRefSet_free (aliases); | |
10497 | } | |
10498 | } | |
10499 | } end_exprNodeList_elements; | |
10500 | } | |
10501 | ||
10502 | long exprNode_getLongValue (exprNode e) { | |
10503 | long value; | |
10504 | ||
10505 | if (exprNode_hasValue (e) | |
10506 | && multiVal_isInt (exprNode_getValue (e))) | |
10507 | { | |
10508 | value = multiVal_forceInt (exprNode_getValue (e)); | |
10509 | } | |
10510 | else | |
10511 | { | |
10512 | value = 0; | |
10513 | } | |
10514 | ||
10515 | return value; | |
10516 | } | |
10517 | ||
d46ce6a4 | 10518 | /*@observer@*/ fileloc exprNode_getfileloc (exprNode p_e) |
616915dd | 10519 | { |
84c9ffbf | 10520 | if (exprNode_isDefined (p_e) ) |
d46ce6a4 | 10521 | return ( p_e->loc ); |
616915dd | 10522 | else |
10523 | return fileloc_undefined; | |
10524 | } | |
10525 | ||
bb25bea6 | 10526 | /*@only@*/ fileloc exprNode_getNextSequencePoint (exprNode e) |
616915dd | 10527 | { |
10528 | /* | |
10529 | ** Returns the location of the sequence point following e. | |
10530 | ** | |
10531 | ** Only works for statements (for now). | |
10532 | */ | |
10533 | ||
10534 | if (exprNode_isDefined (e) && e->kind == XPR_STMT) { | |
10535 | lltok t = exprData_getUopTok (e->edata); | |
bb25bea6 | 10536 | return fileloc_copy(lltok_getLoc (t)); |
616915dd | 10537 | } else { |
28bf4b0b | 10538 | //drl possible problem : warning fix |
616915dd | 10539 | // llcontbug (message ("Cannot get next sequence point: %s", exprNode_unparse (e))); |
10540 | return fileloc_undefined; | |
10541 | } | |
10542 | } | |
10543 | ||
9280addf | 10544 | exprNode exprNode_createNew(ctype c) |
10545 | { | |
10546 | exprNode ret; | |
10547 | ||
10548 | ret = exprNode_createPlain (c); | |
10549 | ||
10550 | return ret; | |
10551 | } |