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28bf4b0b 1/*
2** LCLint - annotation-assisted static program checker
3** Copyright (C) 1994-2001 University of Virginia,
4** Massachusetts Institute of Technology
5**
6** This program is free software; you can redistribute it and/or modify it
7** under the terms of the GNU General Public License as published by the
8** Free Software Foundation; either version 2 of the License, or (at your
9** option) any later version.
10**
11** This program is distributed in the hope that it will be useful, but
12** WITHOUT ANY WARRANTY; without even the implied warranty of
13** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14** General Public License for more details.
15**
16** The GNU General Public License is available from http://www.gnu.org/ or
17** the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
18** MA 02111-1307, USA.
19**
20** For information on lclint: lclint-request@cs.virginia.edu
21** To report a bug: lclint-bug@cs.virginia.edu
22** For more information: http://lclint.cs.virginia.edu
23*/
24/*
25** stateClauseList.c
26*/
27
28# include "lclintMacros.nf"
29# include "basic.h"
30
31static /*@notnull@*/ stateClauseList stateClauseList_new (void)
32{
33 stateClauseList s = (stateClauseList) dmalloc (sizeof (*s));
34
35 s->nelements = 0;
36 s->nspace = stateClauseListBASESIZE;
37 s->elements = (stateClause *)
38 dmalloc (sizeof (*s->elements) * stateClauseListBASESIZE);
39
40 return (s);
41}
42
43static void
44stateClauseList_grow (stateClauseList s)
45{
46 int i;
47 stateClause *newelements;
48
49 llassert (stateClauseList_isDefined (s));
50
51 s->nspace += stateClauseListBASESIZE;
52
53 newelements = (stateClause *)
54 dmalloc (sizeof (*newelements) * (s->nelements + s->nspace));
55
56 for (i = 0; i < s->nelements; i++)
57 {
58 newelements[i] = s->elements[i];
59 }
60
61 sfree (s->elements);
62 s->elements = newelements;
63}
64
65stateClauseList stateClauseList_add (stateClauseList s, stateClause el)
66{
67 DPRINTF (("Adding: %s", stateClause_unparse (el)));
68
69 if (stateClauseList_isUndefined (s))
70 {
71 s = stateClauseList_new ();
72 }
73 else
74 {
75 stateClauseList_elements (s, cl)
76 {
77 if (stateClause_sameKind (cl, el))
78 {
79 voptgenerror
80 (FLG_SYNTAX,
81 message ("Multiple %q clauses for one function (ignoring second)",
82 stateClause_unparseKind (cl)),
83 g_currentloc);
84
85 stateClause_free (el);
86 return s;
87 }
88 } end_stateClauseList_elements ;
89 }
90
91 if (s->nspace <= 0)
92 {
93 stateClauseList_grow (s);
94 }
95
96 s->nspace--;
97 s->elements[s->nelements] = el;
98 s->nelements++;
99
100 return s;
101}
102
103cstring stateClauseList_unparse (stateClauseList s)
104{
105 cstring st = cstring_undefined;
106 int i;
107
108 if (stateClauseList_isDefined (s))
109 {
110 for (i = 0; i < stateClauseList_size (s); i++)
111 {
112 if (i == 0)
113 {
114 st = message ("%q;", stateClause_unparse (s->elements[i]));
115 }
116 else
117 st = message ("%q %q;", st, stateClause_unparse (s->elements[i]));
118 }
119 }
120
121 return (st);
122}
123
124stateClauseList stateClauseList_copy (stateClauseList s)
125{
126 if (stateClauseList_isDefined (s))
127 {
128 stateClauseList t = (stateClauseList) dmalloc (sizeof (*t));
129 int i;
130
131 t->nelements = s->nelements;
132 t->nspace = 0;
133
134 if (s->nelements > 0)
135 {
136 t->elements = (stateClause *) dmalloc (sizeof (*t->elements) * t->nelements);
137 for (i = 0; i < s->nelements; i++)
138 {
139 t->elements[i] = stateClause_copy (s->elements[i]);
140 }
141 }
142 else
143 {
144 t->elements = NULL;
145 }
146
147 return t;
148 }
149 else
150 {
151 return stateClauseList_undefined;
152 }
153}
154
155void
156stateClauseList_free (stateClauseList s)
157{
158 if (!stateClauseList_isUndefined (s))
159 {
160 int i;
161
162 for (i = 0; i < s->nelements; i++)
163 {
164 stateClause_free (s->elements[i]);
165 }
166
167 sfree (s->elements);
168 sfree (s);
169 }
170}
171
172cstring stateClauseList_dump (stateClauseList s)
173{
174 cstring st = cstring_undefined;
175
176 if (stateClauseList_isUndefined (s)) return st;
177
178 stateClauseList_elements (s, current)
179 {
180 st = message ("%q%q$", st, stateClause_dump (current));
181 } end_stateClauseList_elements;
182
183 return st;
184}
185
186stateClauseList stateClauseList_undump (char **s)
187{
188 char c;
189 stateClauseList pn = stateClauseList_new ();
190 int paramno = 0;
191
192 c = **s;
193
194 while (c != '#' && c != '@')
195 {
196 stateClause sc = stateClause_undump (s);
197
198 pn = stateClauseList_add (pn, sc);
199 reader_checkChar (s, '$');
200 c = **s;
201 paramno++;
202 }
203
204 return pn;
205}
206
207int stateClauseList_compare (stateClauseList s1, stateClauseList s2)
208{
209 if (stateClauseList_isUndefined (s1)
210 && stateClauseList_isUndefined (s2))
211 {
212 return 0;
213 }
214 else
215 {
216 if ((int) s1 > (int) s2)
217 {
218 return 1;
219 }
220 else
221 {
222 return -1;
223 }
224 }
225}
226
227static /*@exposed@*/ sRefSet
228stateClauseList_getClause (stateClauseList s, stateClause k)
229{
230 stateClauseList_elements (s, el)
231 {
232 if (stateClause_matchKind (el, k))
233 {
234 return stateClause_getRefs (el);
235 }
236 } end_stateClauseList_elements ;
237
238 return sRefSet_undefined;
239}
240
241void stateClauseList_checkAll (uentry ue)
242{
243 stateClauseList clauses = uentry_getStateClauseList (ue);
244 sRef res = uentry_getSref (ue);
245 bool specialResult = FALSE;
246
247 DPRINTF (("Check state clauses: %s", uentry_unparseFull (ue)));
248
249 stateClauseList_elements (clauses, cl)
250 {
251 bool isPre = stateClause_isBeforeOnly (cl);
252
253 if (stateClause_isGlobal (cl))
254 {
255 /*@i232@*/
256 }
257 else
258 {
259 sRefSet refs = stateClause_getRefs (cl);
260
261 sRefSet_allElements (refs, el)
262 {
263 sRef rb = sRef_getRootBase (el);
264
265 DPRINTF (("Check: %s", sRef_unparse (el)));
266
267 if (stateClause_setsMetaState (cl))
268 {
269 qual q = stateClause_getMetaQual (cl);
270 annotationInfo qa = qual_getAnnotationInfo (q);
271
272 if (!annotationInfo_matchesContextRef (qa, el))
273 {
274 if (optgenerror
275 (FLG_ANNOTATIONERROR,
6970c11b 276 message ("Meta state annotation %s used on inappropriate reference %q in %q clause of %q: %q",
28bf4b0b 277 qual_unparse (q),
278 sRef_unparse (el),
279 stateClause_unparseKind (cl),
280 uentry_getName (ue),
281 stateClause_unparse (cl)),
282 uentry_whereLast (ue)))
283 {
284 /*@i! annotationInfo_showContextError (ainfo, ue); */
285 }
286 }
287 }
288
289 if (sRef_isResult (rb))
290 {
291 if (isPre)
292 {
293 voptgenerror
294 (FLG_INCONDEFS,
295 message ("Function result is used in %q clause of %q "
296 "(%q applies to the state before function is "
297 "called, so should not use result): %q",
298 stateClause_unparseKind (cl),
299 uentry_getName (ue),
300 stateClause_unparseKind (cl),
301 sRef_unparse (el)),
302 uentry_whereLast (ue));
303 }
304 else
305 {
306 if (!sRef_isStateSpecial (res))
307 {
ccf0a4a8 308 DPRINTF (("Here we are: %s", sRef_unparseFull (res)));
309
28bf4b0b 310 if (!specialResult)
311 {
312 sstate pstate = sRef_getDefState (res);
313
314 if (!sRef_makeStateSpecial (res))
315 {
ccf0a4a8 316 if (optgenerror
317 (FLG_INCONDEFS,
318 message ("Function result is used in %q clause of %q "
319 "but was previously annotated with %s: %q",
320 stateClause_unparseKind (cl),
321 uentry_getName (ue),
322 sstate_unparse (pstate),
323 sRef_unparse (el)),
324 uentry_whereLast (ue)))
325 {
326 specialResult = TRUE;
327 }
328 }
28bf4b0b 329 }
330 }
331
ccf0a4a8 332 DPRINTF (("Fixing result type! %s", sRef_unparseFull (el)));
28bf4b0b 333 (void) sRef_fixResultType (el, sRef_getType (res), ue);
334 }
335 }
336 else if (sRef_isParam (rb))
337 {
338 DPRINTF (("Make special: %s", sRef_unparseFull (rb)));
339
340 if (!sRef_makeStateSpecial (rb))
341 {
342 if (fileloc_isXHFile (uentry_whereLast (ue)))
343 {
344 ; /* Okay to override in .xh files */
345 }
346 else
347 {
348 voptgenerror
349 (FLG_INCONDEFS,
350 message ("Reference %q used in %q clause of %q, "
351 "but was previously annotated with %s: %q",
352 sRef_unparse (rb),
353 stateClause_unparseKind (cl),
354 uentry_getName (ue),
355 sstate_unparse (sRef_getDefState (res)),
356 sRef_unparse (el)),
357 uentry_whereLast (ue));
358 }
359 }
360
361 DPRINTF (("Made special: %s", sRef_unparseFull (rb)));
362 }
363 else if (sRef_isInvalid (rb))
364 {
365 /*@innercontinue@*/ continue;
366 }
367 else
368 {
369 BADBRANCHCONT;
370 /*@innercontinue@*/ continue;
371 }
372
373 if (stateClause_isMemoryAllocation (cl))
374 {
375 if (!ctype_isVisiblySharable (sRef_getType (el)))
376 {
377 voptgenerror
378 (FLG_ANNOTATIONERROR,
379 /*@-sefparams@*/ /* This is okay because its fresh storage. */ /*@i32@*/
380 message
381 ("%q clauses includes %q of "
382 "non-dynamically allocated type %s",
383 cstring_capitalizeFree (stateClause_unparseKind (cl)),
384 sRef_unparse (el),
385 ctype_unparse (sRef_getType (el))),
386 uentry_whereLast (ue));
387 /*@=sefparams@*/
388 }
389 }
390
391 } end_sRefSet_allElements ;
392 }
393 } end_stateClauseList_elements ;
394}
395
396void stateClauseList_checkEqual (uentry old, uentry unew)
397{
398 stateClauseList oldClauses = uentry_getStateClauseList (old);
399 stateClauseList newClauses = uentry_getStateClauseList (unew);
400
401 if (stateClauseList_isDefined (newClauses))
402 {
403 stateClauseList_elements (newClauses, cl)
404 {
405 if (stateClause_isGlobal (cl))
406 {
407 ;
408 }
409 else
410 {
411 sRefSet sc = stateClauseList_getClause (oldClauses, cl);
412
413 if (!sRefSet_equal (sc, stateClause_getRefs (cl)))
414 {
415 if (optgenerror
416 (FLG_INCONDEFS,
417 message ("Function %q %rdeclared with inconsistent %q clause: %q",
418 uentry_getName (old),
419 uentry_isDeclared (old),
420 stateClause_unparseKind (cl),
421 sRefSet_unparsePlain (stateClause_getRefs (cl))),
422 g_currentloc))
423 {
424 uentry_showWhereLastExtra (old, sRefSet_unparsePlain (sc));
425 }
426 }
427 }
428 } end_stateClauseList_elements ;
429
430 stateClauseList_elements (oldClauses, cl)
431 {
432 if (stateClause_isGlobal (cl))
433 {
434 ; /*@i32@*/
435 }
436 else
437 {
438 sRefSet sc = stateClauseList_getClause (newClauses, cl);
439
440 if (sRefSet_isUndefined (sc) && !sRefSet_isEmpty (stateClause_getRefs (cl)))
441 {
442 if (optgenerror
443 (FLG_INCONDEFS,
444 message ("Function %q %rdeclared without %q clause (either "
445 "use no special clauses in redeclaration, or "
446 "they must match exactly: %q",
447 uentry_getName (old),
448 uentry_isDeclared (old),
449 stateClause_unparseKind (cl),
450 sRefSet_unparsePlain (stateClause_getRefs (cl))),
451 g_currentloc))
452 {
453 uentry_showWhereLastExtra (old, sRefSet_unparsePlain (sc));
454 }
455 }
456 }
457 } end_stateClauseList_elements ;
458 }
459}
460
461
462
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