2 ** Splint - annotation-assisted static program checker
3 ** Copyright (C) 1994-2003 University of Virginia,
4 ** Massachusetts Institute of Technology
6 ** This program is free software; you can redistribute it and/or modify it
7 ** under the terms of the GNU General Public License as published by the
8 ** Free Software Foundation; either version 2 of the License, or (at your
9 ** option) any later version.
11 ** This program is distributed in the hope that it will be useful, but
12 ** WITHOUT ANY WARRANTY; without even the implied warranty of
13 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 ** General Public License for more details.
16 ** The GNU General Public License is available from http://www.gnu.org/ or
17 ** the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
18 ** MA 02111-1307, USA.
20 ** For information on splint: info@splint.org
21 ** To report a bug: splint-bug@splint.org
22 ** For more information: http://www.splint.org
25 # include "splintMacros.nf"
28 static /*@observer@*/ cstring stateAction_unparse (stateAction p_sa) /*@*/ ;
30 void stateInfo_free (/*@only@*/ stateInfo a)
34 fileloc_free (a->loc);
39 /*@only@*/ stateInfo stateInfo_update (/*@only@*/ stateInfo old, stateInfo newinfo)
41 ** returns an stateInfo with the same value as new. May reuse the
42 ** storage of old. (i.e., same effect as copy, but more
48 DPRINTF (("Update state ==> %s", stateInfo_unparse (newinfo)));
49 return stateInfo_copy (newinfo);
51 else if (newinfo == NULL)
58 if (fileloc_equal (old->loc, newinfo->loc)
59 && old->action == newinfo->action
60 /*@-abstractcompare@*/ && old->ref == newinfo->ref /*@=abstractcompare@*/)
63 ** Duplicate (change through alias most likely)
64 ** don't add this info
71 stateInfo snew = stateInfo_makeRefLoc (newinfo->ref,
72 newinfo->loc, newinfo->action);
73 llassert (snew->previous == NULL);
75 DPRINTF (("Update state ==> %s", stateInfo_unparse (snew)));
81 static /*@observer@*/ stateInfo stateInfo_sort (/*@temp@*/ stateInfo sinfo)
82 /* Sorts in reverse location order */
84 DPRINTF (("Sorting: %s", stateInfo_unparse (sinfo)));
86 if (sinfo == NULL || sinfo->previous == NULL)
92 stateInfo snext = stateInfo_sort (sinfo->previous);
93 stateInfo sfirst = snext;
95 DPRINTF (("sinfo/sext: %s // %s", stateInfo_unparse (sinfo), stateInfo_unparse (snext)));
96 llassert (snext != NULL);
98 if (!fileloc_lessthan (sinfo->loc, snext->loc))
100 /*@i888@*/ sinfo->previous = sfirst;
101 DPRINTF (("Sorted ==> %s", stateInfo_unparse (sinfo)));
102 /*@i888@*/ return sinfo;
106 while (snext != NULL && fileloc_lessthan (sinfo->loc, snext->loc))
111 fileloc tloc = snext->loc;
112 stateAction taction = snext->action;
113 sRef tref = snext->ref;
115 DPRINTF (("in while: sinfo/sext: %s // %s", stateInfo_unparse (sinfo), stateInfo_unparse (snext)));
117 snext->loc = sinfo->loc;
118 snext->action = sinfo->action;
119 /*@i888@*/ snext->ref = sinfo->ref;
122 sinfo->action = taction;
124 /*@i888@*/ sinfo->previous = snext->previous;
125 snext = snext->previous;
126 DPRINTF (("in while: sinfo/sext: %s // %s", stateInfo_unparse (sinfo), stateInfo_unparse (snext)));
129 DPRINTF (("Sorted ==> %s", stateInfo_unparse (sfirst)));
130 /*@i888@*/ return sfirst;
136 stateInfo_updateLoc (/*@only@*/ stateInfo old, stateAction action, fileloc loc)
138 if (fileloc_isUndefined (loc)) {
139 loc = fileloc_copy (g_currentloc);
142 if (old != NULL && fileloc_equal (old->loc, loc) && old->action == action)
145 ** Duplicate (change through alias most likely)
146 ** don't add this info
153 stateInfo snew = stateInfo_makeLoc (loc, action);
154 llassert (snew->previous == NULL);
155 snew->previous = old;
156 DPRINTF (("Update state ==> %s", stateInfo_unparse (snew)));
162 stateInfo_updateRefLoc (/*@only@*/ stateInfo old, /*@exposed@*/ sRef ref,
163 stateAction action, fileloc loc)
165 if (fileloc_isUndefined (loc)) {
166 loc = fileloc_copy (g_currentloc);
169 if (old != NULL && fileloc_equal (old->loc, loc)
170 && old->action == action
171 /*@-abstractcompare*/ && old->ref == ref /*@=abstractcompare@*/)
174 ** Duplicate (change through alias most likely)
175 ** don't add this info
182 stateInfo snew = stateInfo_makeRefLoc (ref, loc, action);
183 llassert (snew->previous == NULL);
184 snew->previous = old;
185 DPRINTF (("Update state ==> %s", stateInfo_unparse (snew)));
190 /*@only@*/ stateInfo stateInfo_copy (stateInfo a)
198 stateInfo ret = (stateInfo) dmalloc (sizeof (*ret));
200 ret->loc = fileloc_copy (a->loc); /*< should report bug without copy! >*/
202 ret->action = a->action;
203 ret->previous = stateInfo_copy (a->previous);
209 /*@only@*/ /*@notnull@*/ stateInfo
210 stateInfo_currentLoc (void)
212 return stateInfo_makeLoc (g_currentloc, SA_DECLARED);
215 /*@only@*/ /*@notnull@*/ stateInfo
216 stateInfo_makeLoc (fileloc loc, stateAction action)
218 stateInfo ret = (stateInfo) dmalloc (sizeof (*ret));
220 if (fileloc_isUndefined (loc)) {
221 ret->loc = fileloc_copy (g_currentloc);
223 ret->loc = fileloc_copy (loc);
226 ret->ref = sRef_undefined;
227 ret->action = action;
228 ret->previous = stateInfo_undefined;
230 DPRINTF (("Make loc ==> %s", stateInfo_unparse (ret)));
234 /*@only@*/ /*@notnull@*/ stateInfo
235 stateInfo_makeRefLoc (/*@exposed@*/ sRef ref, fileloc loc, stateAction action)
236 /*@post:isnull result->previous@*/
238 stateInfo ret = (stateInfo) dmalloc (sizeof (*ret));
240 if (fileloc_isUndefined (loc)) {
241 ret->loc = fileloc_copy (g_currentloc);
243 ret->loc = fileloc_copy (loc);
247 ret->action = action;
248 ret->previous = stateInfo_undefined;
254 stateInfo_unparse (stateInfo s)
256 cstring res = cstring_makeLiteral ("");
258 while (stateInfo_isDefined (s)) {
259 res = message ("%q%q: ", res, fileloc_unparse (s->loc));
260 if (sRef_isValid (s->ref)) {
261 res = message ("%q through alias %q ", res, sRef_unparse (s->ref));
264 res = message ("%q%s; ", res, stateAction_unparse (s->action));
271 fileloc stateInfo_getLoc (stateInfo info)
273 if (stateInfo_isDefined (info))
278 return fileloc_undefined;
281 stateAction stateAction_fromNState (nstate ns)
290 return SA_BECOMESNONNULL;
295 return SA_BECOMESPOSSIBLYNULL;
297 return SA_BECOMESNULL;
299 return SA_BECOMESPOSSIBLYNULL;
303 stateAction stateAction_fromExkind (exkind ex)
317 /*@notreached@*/ return SA_UNKNOWN;
320 stateAction stateAction_fromAlkind (alkind ak)
349 return SA_REFCOUNTED;
360 case AK_IMPDEPENDENT:
361 return SA_IMPDEPENDENT;
369 /*@notreached@*/ return SA_UNKNOWN;
372 stateAction stateAction_fromSState (sstate ss)
376 case SS_UNKNOWN: return SA_DECLARED;
377 case SS_UNUSEABLE: return SA_KILLED;
378 case SS_UNDEFINED: return SA_UNDEFINED;
379 case SS_MUNDEFINED: return SA_MUNDEFINED;
380 case SS_ALLOCATED: return SA_ALLOCATED;
381 case SS_PDEFINED: return SA_PDEFINED;
382 case SS_DEFINED: return SA_DEFINED;
383 case SS_PARTIAL: return SA_PDEFINED;
384 case SS_DEAD: return SA_RELEASED;
385 case SS_HOFFA: return SA_PKILLED;
386 case SS_SPECIAL: return SA_DECLARED;
387 case SS_RELDEF: return SA_DECLARED;
393 llbug (message ("Unexpected sstate: %s", sstate_unparse (ss)));
394 /*@notreached@*/ return SA_UNKNOWN;
398 static /*@observer@*/ cstring stateAction_unparse (stateAction sa)
402 case SA_UNKNOWN: return cstring_makeLiteralTemp ("changed <unknown modification>");
403 case SA_CHANGED: return cstring_makeLiteralTemp ("changed");
405 case SA_CREATED: return cstring_makeLiteralTemp ("created");
406 case SA_DECLARED: return cstring_makeLiteralTemp ("declared");
407 case SA_DEFINED: return cstring_makeLiteralTemp ("defined");
408 case SA_PDEFINED: return cstring_makeLiteralTemp ("partially defined");
409 case SA_RELEASED: return cstring_makeLiteralTemp ("released");
410 case SA_ALLOCATED: return cstring_makeLiteralTemp ("allocated");
411 case SA_KILLED: return cstring_makeLiteralTemp ("released");
412 case SA_PKILLED: return cstring_makeLiteralTemp ("possibly released");
413 case SA_MERGED: return cstring_makeLiteralTemp ("merged");
414 case SA_UNDEFINED: return cstring_makeLiteralTemp ("becomes undefined");
415 case SA_MUNDEFINED: return cstring_makeLiteralTemp ("possibly undefined");
417 case SA_SHARED: return cstring_makeLiteralTemp ("becomes shared");
418 case SA_ONLY: return cstring_makeLiteralTemp ("becomes only");
419 case SA_IMPONLY: return cstring_makeLiteralTemp ("becomes implicitly only");
420 case SA_OWNED: return cstring_makeLiteralTemp ("becomes owned");
421 case SA_DEPENDENT: return cstring_makeLiteralTemp ("becomes dependent");
422 case SA_IMPDEPENDENT: return cstring_makeLiteralTemp ("becomes implicitly dependent");
423 case SA_KEPT: return cstring_makeLiteralTemp ("becomes kept");
424 case SA_KEEP: return cstring_makeLiteralTemp ("becomes keep");
425 case SA_FRESH: return cstring_makeLiteralTemp ("becomes fresh");
426 case SA_TEMP: return cstring_makeLiteralTemp ("becomes temp");
427 case SA_IMPTEMP: return cstring_makeLiteralTemp ("becomes implicitly temp");
428 case SA_XSTACK: return cstring_makeLiteralTemp ("becomes stack-allocated storage");
429 case SA_STATIC: return cstring_makeLiteralTemp ("becomes static");
430 case SA_LOCAL: return cstring_makeLiteralTemp ("becomes local");
432 case SA_REFCOUNTED: return cstring_makeLiteralTemp ("becomes refcounted");
433 case SA_REFS: return cstring_makeLiteralTemp ("becomes refs");
434 case SA_NEWREF: return cstring_makeLiteralTemp ("becomes newref");
435 case SA_KILLREF: return cstring_makeLiteralTemp ("becomes killref");
437 case SA_OBSERVER: return cstring_makeLiteralTemp ("becomes observer");
438 case SA_EXPOSED: return cstring_makeLiteralTemp ("becomes exposed");
440 case SA_BECOMESNULL: return cstring_makeLiteralTemp ("becomes null");
441 case SA_BECOMESNONNULL: return cstring_makeLiteralTemp ("becomes non-null");
442 case SA_BECOMESPOSSIBLYNULL: return cstring_makeLiteralTemp ("becomes possibly null");
445 DPRINTF (("Bad state action: %d", sa));
449 void stateInfo_display (stateInfo s, cstring sname)
451 bool showdeep = context_flagOn (FLG_SHOWDEEPHISTORY, g_currentloc);
453 s = stateInfo_sort (s);
455 while (stateInfo_isDefined (s))
457 cstring msg = message ("%s%s", sname, stateAction_unparse (s->action));
459 if (sRef_isValid (s->ref)) {
460 msg = message ("%q (through alias %q)", msg, sRef_unparse (s->ref));
463 llgenindentmsg (msg, s->loc);
472 cstring_free (sname);