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
26 ** constraintGeneration.c
29 /* #define DEBUGPRINT 1 */
31 # include <ctype.h> /* for isdigit */
32 # include "splintMacros.nf"
35 # include "cgrammar_tokens.h"
37 # include "exprChecks.h"
38 # include "exprNodeSList.h"
40 /*drl We need to access the internal representation of exprNode
41 because these functions walk down the parse tree and need a richer
42 information than is accessible through the exprNode interface.*/
46 static /*@nullwhentrue@*/ bool exprNode_handleError (/*@temp@*/ exprNode p_e);
48 static void exprNode_stmt (/*@temp@*/ /*@temp@*/ exprNode p_e);
49 static void exprNode_multiStatement (/*@temp@*/ exprNode p_e);
51 static constraintList exprNode_traversTrueEnsuresConstraints (/*@temp@*/ exprNode p_e);
52 static constraintList exprNode_traversFalseEnsuresConstraints (/*@temp@*/ exprNode p_e);
54 static void checkArgumentList (/*@out@*/ exprNode p_temp, exprNodeList p_arglist, fileloc p_sequencePoint) /*@modifies p_temp @*/;
56 static constraintList checkCall (/*@temp@*/ exprNode p_fcn, exprNodeList p_arglist);
58 static bool exprNode_isUnhandled (/*@temp@*/ /*@observer@*/ exprNode e)
60 llassert(exprNode_isDefined(e));
86 DPRINTF((message ("Warning current constraint generation does not handle expression %s", exprNode_unparse(e))));
98 /*@nullwhentrue@*/ bool exprNode_handleError (exprNode e)
100 if (exprNode_isError (e) || exprNode_isUnhandled (e))
108 /* evans 2002-03-2 - parameter was dependent */
109 bool /*@alt void@*/ exprNode_generateConstraints (/*@temp@*/ exprNode e)
111 if (exprNode_isError (e))
114 if (exprNode_isUnhandled (e))
116 DPRINTF((message("Warning ignoring %s", exprNode_unparse (e))));
120 DPRINTF((message ("exprNode_generateConstraints Analysising %s at %s", exprNode_unparse(e),
121 fileloc_unparse(exprNode_getfileloc(e)))));
123 if (exprNode_isMultiStatement (e))
125 exprNode_multiStatement(e);
131 /* loc = exprNode_getNextSequencePoint(e); */
132 /* exprNode_exprTraverse(e, FALSE, FALSE, loc); */
134 /* fileloc_free(loc); */
144 c = constraintList_makeFixedArrayConstraints (e->uses);
145 e->requiresConstraints = constraintList_reflectChangesFreePre (e->requiresConstraints, c);
146 constraintList_free(c);
149 DPRINTF ((message ("e->requiresConstraints %s", constraintList_unparseDetailed (e->requiresConstraints))));
153 static void exprNode_stmt (/*@temp@*/ exprNode e)
159 if (exprNode_isError(e))
164 /*e->requiresConstraints = constraintList_makeNew();
165 e->ensuresConstraints = constraintList_makeNew(); */
167 DPRINTF(("expNode_stmt: STMT:"));
168 s = exprNode_unparse(e);
169 DPRINTF ((message("exprNode_stmt: STMT: %s ", s)));
171 if (e->kind == XPR_INIT)
173 constraintList tempList;
175 DPRINTF ((message ("%s ", exprNode_unparse (e))));
176 loc = exprNode_getNextSequencePoint(e); /* reduces to an expression */
177 exprNode_exprTraverse (e, FALSE, FALSE, loc);
180 tempList = e->requiresConstraints;
181 e->requiresConstraints = exprNode_traversRequiresConstraints(e);
182 constraintList_free(tempList);
184 tempList = e->ensuresConstraints;
185 e->ensuresConstraints = exprNode_traversEnsuresConstraints(e);
186 constraintList_free(tempList);
190 /*drl 2/13/002 patched bug so return statement will be checked*/
191 /*return is a stmt not not expression ...*/
192 if (e->kind == XPR_RETURN)
194 constraintList tempList;
196 loc = exprNode_getNextSequencePoint(e); /* reduces to an expression */
198 exprNode_exprTraverse (exprData_getSingle (e->edata), FALSE, TRUE, loc);
201 tempList = e->requiresConstraints;
202 e->requiresConstraints = exprNode_traversRequiresConstraints(e);
203 constraintList_free(tempList);
206 if (e->kind != XPR_STMT)
209 DPRINTF (("Not Stmt"));
210 DPRINTF ((message ("%s ", exprNode_unparse (e))));
212 if (exprNode_isMultiStatement (e))
214 exprNode_multiStatement (e); /* evans 2001-08-21: spurious return removed */
218 loc = exprNode_getNextSequencePoint(e); /* reduces to an expression */
220 exprNode_exprTraverse (e, FALSE, TRUE, loc);
228 DPRINTF ((message ("%s ", exprNode_unparse (e))));
230 snode = exprData_getUopNode (e->edata);
232 /* could be stmt involving multiple statements:
233 i.e. if, while for ect.
236 if (exprNode_isMultiStatement (snode))
238 exprNode_multiStatement (snode);
239 (void) exprNode_copyConstraints (e, snode);
243 loc = exprNode_getNextSequencePoint(e); /* reduces to an expression */
244 exprNode_exprTraverse (snode, FALSE, FALSE, loc);
248 constraintList_free (e->requiresConstraints);
249 e->requiresConstraints = exprNode_traversRequiresConstraints(snode);
251 constraintList_free (e->ensuresConstraints);
252 e->ensuresConstraints = exprNode_traversEnsuresConstraints(snode);
254 DPRINTF ((message ("smtlist constraints are: pre: %s \n and \t post %s\n",
255 constraintList_unparse(e->requiresConstraints),
256 constraintList_unparse(e->ensuresConstraints))));
261 static void exprNode_stmtList (/*@dependent@*/ exprNode e)
263 exprNode stmt1, stmt2;
264 if (exprNode_isError (e))
270 Handle case of stmtList with only one statement:
271 The parse tree stores this as stmt instead of stmtList
274 if (e->kind != XPR_STMTLIST)
279 llassert (e->kind == XPR_STMTLIST);
280 DPRINTF(("exprNode_stmtList STMTLIST:"));
281 DPRINTF ((cstring_toCharsSafe (exprNode_unparse(e))));
282 stmt1 = exprData_getPairA (e->edata);
283 stmt2 = exprData_getPairB (e->edata);
286 DPRINTF(("exprNode_stmtlist "));
287 DPRINTF ((message("XW%s | %s", exprNode_unparse(stmt1), exprNode_unparse(stmt2))));
289 exprNode_stmt (stmt1);
290 DPRINTF(("\nstmt after stmtList call "));
292 exprNode_stmt (stmt2);
293 exprNode_mergeResolve (e, stmt1, stmt2);
295 DPRINTF ((message ("smtlist constraints are: pre: %s \n and \t post %s\n",
296 constraintList_unparse(e->requiresConstraints),
297 constraintList_unparse(e->ensuresConstraints))));
301 static exprNode doIf (/*@returned@*/ exprNode e, /*@dependent@*/ exprNode test, /*@dependent@*/ exprNode body)
305 DPRINTF ((message ("doIf: %s ", exprNode_unparse(e))));
307 llassert(exprNode_isDefined(test));
308 llassert (exprNode_isDefined (e));
309 llassert (exprNode_isDefined (body));
312 DPRINTF((message ("ensures constraints for %s are %s", exprNode_unparse(e), constraintList_unparseDetailed(e->ensuresConstraints))));
314 DPRINTF((message ("Requires constraints for %s are %s", exprNode_unparse(e), constraintList_unparseDetailed(e->ensuresConstraints))));
316 DPRINTF((message ("trueEnsures constraints for %s are %s", exprNode_unparse(e), constraintList_unparseDetailed(e->trueEnsuresConstraints))));
318 DPRINTF((message ("falseEnsures constraints for %s are %s", exprNode_unparse(e), constraintList_unparseDetailed(e->falseEnsuresConstraints))));
322 DPRINTF((message ("ensures constraints for %s are %s", exprNode_unparse(test), constraintList_unparseDetailed(test->ensuresConstraints))));
324 DPRINTF((message ("Requires constraints for %s are %s", exprNode_unparse(test), constraintList_unparseDetailed(test->ensuresConstraints))));
326 DPRINTF((message ("trueEnsures constraints for %s are %s", exprNode_unparse(test), constraintList_unparseDetailed(test->trueEnsuresConstraints))));
328 DPRINTF((message ("falseEnsures constraints for %s are %s", exprNode_unparse(test), constraintList_unparseDetailed(test->falseEnsuresConstraints))));
332 temp = test->trueEnsuresConstraints;
333 test->trueEnsuresConstraints = exprNode_traversTrueEnsuresConstraints(test);
334 constraintList_free(temp);
336 temp = test->ensuresConstraints;
337 test->ensuresConstraints = exprNode_traversEnsuresConstraints (test);
338 constraintList_free(temp);
340 temp = test->requiresConstraints;
341 test->requiresConstraints = exprNode_traversRequiresConstraints (test);
342 constraintList_free(temp);
345 test->trueEnsuresConstraints = constraintList_substituteFreeTarget(test->trueEnsuresConstraints, test->ensuresConstraints);
347 DPRINTF ((message ("doIf: test ensures %s ", constraintList_unparse(test->ensuresConstraints))));
349 DPRINTF ((message ("doIf: test true ensures %s ", constraintList_unparse(test->trueEnsuresConstraints))));
351 constraintList_free(e->requiresConstraints);
354 e->requiresConstraints = constraintList_reflectChanges(body->requiresConstraints, test->trueEnsuresConstraints);
356 e->requiresConstraints = constraintList_reflectChangesFreePre (e->requiresConstraints,
357 test->ensuresConstraints);
358 temp = e->requiresConstraints;
359 e->requiresConstraints = constraintList_mergeRequires (e->requiresConstraints, test->requiresConstraints);
360 constraintList_free(temp);
363 /* drl possible problem : warning bad */
364 constraintList_free(e->ensuresConstraints);
365 e->ensuresConstraints = constraintList_copy (test->ensuresConstraints);
367 if (exprNode_mayEscape (body))
369 DPRINTF ((message("doIf: the if statement body %s returns or exits", exprNode_unparse(body))));
370 e->ensuresConstraints = constraintList_mergeEnsuresFreeFirst (e->ensuresConstraints,
371 test->falseEnsuresConstraints);
374 DPRINTF ((message ("doIf: if requiers %s ", constraintList_unparse(e->requiresConstraints))));
380 Also used for condition i.e. ?: operation
383 This function assumes that p, trueBranch, falseBranch have have all been traversed
384 for constraints i.e. we assume that exprNode_traversEnsuresConstraints,
385 exprNode_traversRequiresConstraints, exprNode_traversTrueEnsuresConstraints,
386 exprNode_traversFalseEnsuresConstraints have all been run
389 static exprNode doIfElse (/*@returned@*/ exprNode e, /*@dependent@*/ exprNode p, /*@dependent@*/ exprNode trueBranch, /*@dependent@*/ exprNode falseBranch)
391 constraintList c1, cons, t, t2, f, f2;
393 llassert (exprNode_isDefined (e));
394 llassert (exprNode_isDefined (p));
395 llassert (exprNode_isDefined (trueBranch));
396 llassert (exprNode_isDefined (falseBranch));
397 DPRINTF ((message ("doIfElse: %s ", exprNode_unparse(e))));
399 /* do requires clauses */
400 c1 = constraintList_copy (p->ensuresConstraints);
402 t = constraintList_reflectChanges(trueBranch->requiresConstraints, p->trueEnsuresConstraints);
403 t = constraintList_reflectChangesFreePre (t, p->ensuresConstraints);
405 cons = constraintList_reflectChanges(falseBranch->requiresConstraints, p->falseEnsuresConstraints);
406 cons = constraintList_reflectChangesFreePre (cons, c1);
408 constraintList_free (e->requiresConstraints);
409 e->requiresConstraints = constraintList_mergeRequiresFreeFirst (t, cons);
410 e->requiresConstraints = constraintList_mergeRequiresFreeFirst (e->requiresConstraints, p->requiresConstraints);
412 /* do ensures clauses
413 find the the ensures lists for each subbranch
416 t = constraintList_mergeEnsures (p->trueEnsuresConstraints, trueBranch->ensuresConstraints);
418 t = constraintList_mergeEnsures (p->ensuresConstraints, t);
419 constraintList_free(t2);
421 f = constraintList_mergeEnsures (p->falseEnsuresConstraints, falseBranch->ensuresConstraints);
423 f = constraintList_mergeEnsures (p->ensuresConstraints, f);
424 constraintList_free(f2);
426 /* find ensures for whole if/else statement */
428 constraintList_free(e->ensuresConstraints);
430 e->ensuresConstraints = constraintList_logicalOr (t, f);
432 constraintList_free(t);
433 constraintList_free(f);
434 constraintList_free(cons);
435 constraintList_free(c1);
437 DPRINTF ((message ("doIfElse: if requires %q ", constraintList_unparse(e->requiresConstraints))));
438 DPRINTF ((message ("doIfElse: if ensures %q ", constraintList_unparse(e->ensuresConstraints))));
443 static exprNode doWhile (/*@returned@*/ exprNode e, /*@dependent@*/ exprNode test, /*@dependent@*/ exprNode body)
445 DPRINTF ((message ("doWhile: %s ", exprNode_unparse(e))));
446 return doIf (e, test, body);
449 /*@only@*/ constraintList constraintList_makeFixedArrayConstraints (/*@observer@*/ sRefSet s)
453 ret = constraintList_makeNew();
455 sRefSet_elements (s, el)
457 if (sRef_isFixedArray(el))
460 DPRINTF((message("%s is a fixed array",
462 size = sRef_getArraySize(el);
463 DPRINTF((message("%s is a fixed array with size %d",
464 sRef_unparse(el), (int)size)));
465 con = constraint_makeSRefSetBufferSize (el, size_toLong (size - 1));
466 ret = constraintList_add(ret, con);
470 DPRINTF((message("%s is not a fixed array",
474 if (sRef_isExternallyVisible (el))
477 DPRINTF((message("%s is externally visible",
479 con = constraint_makeSRefWriteSafeInt(el, 0);
480 ret = constraintList_add(ret, con);
482 con = constraint_makeSRefReadSafeInt(el, 0);
484 ret = constraintList_add(ret, con);
489 end_sRefSet_elements ;
491 DPRINTF((message("constraintList_makeFixedArrayConstraints returning %s",
492 constraintList_unparse(ret))));
497 exprNode makeDataTypeConstraints (/*@returned@*/ exprNode e)
500 DPRINTF(("makeDataTypeConstraints"));
502 c = constraintList_makeFixedArrayConstraints (e->uses);
504 e->ensuresConstraints = constraintList_addListFree (e->ensuresConstraints, c);
510 static void doFor (/*@dependent@*/ exprNode e, /*@dependent@*/ exprNode forPred, /*@dependent@*/ exprNode forBody)
512 exprNode init, test, inc;
513 /* merge the constraints: modle as if statement */
520 llassert (exprNode_isDefined (e));
521 llassert (exprNode_isDefined (forPred));
522 llassert (exprNode_isDefined (forBody));
524 init = exprData_getTripleInit (forPred->edata);
525 test = exprData_getTripleTest (forPred->edata);
526 inc = exprData_getTripleInc (forPred->edata);
528 if (((exprNode_isError (test) /*|| (exprNode_isError(init))*/) || (exprNode_isError (inc))))
530 DPRINTF ((message ("strange for statement:%s, ignoring it", exprNode_unparse(e))));
534 exprNode_forLoopHeuristics(e, forPred, forBody);
536 constraintList_free(e->requiresConstraints);
537 e->requiresConstraints = constraintList_reflectChanges(forBody->requiresConstraints, test->ensuresConstraints);
538 e->requiresConstraints = constraintList_reflectChangesFreePre (e->requiresConstraints, test->trueEnsuresConstraints);
539 e->requiresConstraints = constraintList_reflectChangesFreePre (e->requiresConstraints, forPred->ensuresConstraints);
541 if (!forBody->canBreak)
543 e->ensuresConstraints = constraintList_addListFree(e->ensuresConstraints, constraintList_copy(forPred->ensuresConstraints));
544 e->ensuresConstraints = constraintList_addListFree(e->ensuresConstraints,constraintList_copy(test->falseEnsuresConstraints));
548 DPRINTF(("Can break"));
552 static /*@dependent@*/ exprNode exprNode_makeDependent(/*@returned@*/ exprNode e)
554 /* !!! DRL - this is ridiculous! Read the manual on memory annotations please! */
559 exprNode_doGenerateConstraintSwitch
560 (/*@dependent@*/ exprNode switchExpr,
561 /*@dependent@*/ exprNode body,
562 /*@special@*/ constraintList *currentRequires,
563 /*@special@*/ constraintList *currentEnsures,
564 /*@special@*/ constraintList *savedRequires,
565 /*@special@*/ constraintList *savedEnsures)
566 /*@post:only *currentRequires, *currentEnsures, *savedRequires, *savedEnsures @*/
567 /*@sets *currentRequires, *currentEnsures, *savedRequires, *savedEnsures @*/
569 exprNode stmt, stmtList;
571 DPRINTF((message("exprNode_doGenerateConstraintSwitch: (switch %s) %s",
572 exprNode_unparse(switchExpr), exprNode_unparse(body)
575 if (exprNode_isError(body))
577 *currentRequires = constraintList_makeNew ();
578 *currentEnsures = constraintList_makeNew ();
580 *savedRequires = constraintList_makeNew ();
581 *savedEnsures = constraintList_makeNew ();
587 if (body->kind != XPR_STMTLIST)
589 DPRINTF((message("exprNode_doGenerateConstraintSwitch: non stmtlist: %s",
590 exprNode_unparse(body))));
592 stmtList = exprNode_undefined;
593 stmt = exprNode_makeDependent(stmt);
594 stmtList = exprNode_makeDependent(stmtList);
598 stmt = exprData_getPairB(body->edata);
599 stmtList = exprData_getPairA(body->edata);
600 stmt = exprNode_makeDependent(stmt);
601 stmtList = exprNode_makeDependent(stmtList);
604 DPRINTF((message("exprNode_doGenerateConstraintSwitch: stmtlist: %s stmt: %s",
605 exprNode_unparse(stmtList), exprNode_unparse(stmt))
609 exprNode_doGenerateConstraintSwitch (switchExpr, stmtList, currentRequires, currentEnsures,
610 savedRequires, savedEnsures);
612 if (exprNode_isError(stmt))
619 switchExpr = exprNode_makeDependent (switchExpr);
621 if (! exprNode_isCaseMarker(stmt))
626 DPRINTF ((message("Got normal statement %s (requires %s ensures %s)", exprNode_unparse(stmt),
627 constraintList_unparse(stmt->requiresConstraints), constraintList_unparse(stmt->ensuresConstraints))));
629 temp = constraintList_reflectChanges (stmt->requiresConstraints,
632 *currentRequires = constraintList_mergeRequiresFreeFirst(
636 constraintList_free(temp);
638 *currentEnsures = constraintList_mergeEnsuresFreeFirst
640 stmt->ensuresConstraints);
641 DPRINTF((message("returning from exprNode_doGenerateConstraintSwitch: (switch %s) %s currentRequires:"
642 "%s currentEnsures:%s",
643 exprNode_unparse(switchExpr), exprNode_unparse(body),
644 constraintList_unparse(*currentRequires), constraintList_unparse(*currentEnsures)
652 if (exprNode_isCaseMarker(stmt) && exprNode_mustEscape(stmtList))
655 ** merge current and saved constraint with Logical Or...
656 ** make a constraint for ensures
662 DPRINTF ((message("Got case marker")));
664 if (constraintList_isUndefined(*savedEnsures) &&
665 constraintList_isUndefined(*savedRequires))
667 llassert(constraintList_isUndefined(*savedEnsures));
668 llassert(constraintList_isUndefined(*savedRequires));
669 *savedEnsures = constraintList_copy(*currentEnsures);
670 *savedRequires = constraintList_copy(*currentRequires);
674 DPRINTF ((message("Doing logical or")));
675 temp = constraintList_logicalOr (*savedEnsures, *currentEnsures);
676 constraintList_free (*savedEnsures);
677 *savedEnsures = temp;
679 *savedRequires = constraintList_mergeRequiresFreeFirst (*savedRequires, *currentRequires);
682 con = constraint_makeEnsureEqual (switchExpr, exprData_getSingle
683 (stmt->edata), exprNode_getfileloc(stmt));
686 constraintList_free(*currentEnsures);
687 *currentEnsures = constraintList_makeNew();
688 *currentEnsures = constraintList_add(*currentEnsures, con);
690 constraintList_free(*currentRequires);
691 *currentRequires = constraintList_makeNew();
692 DPRINTF((message("exprNode_doGenerateConstraintSwitch: (switch %s) %s savedRequires:"
693 "%s savedEnsures:%s",
694 exprNode_unparse(switchExpr), exprNode_unparse(body),
695 constraintList_unparse(*savedRequires), constraintList_unparse(*savedEnsures)
700 else if (exprNode_isCaseMarker(stmt))
701 /* prior case has no break. */
704 We don't do anything to the sved constraints because the case hasn't ended
705 The new ensures constraints for the case will be:
706 the constraint for the case statement (CASE_LABEL == SWITCH_EXPR) logicalOr currentEnsures
712 constraintList ensuresTemp;
714 DPRINTF ((message("Got case marker with no prior break")));
716 con = constraint_makeEnsureEqual (switchExpr, exprData_getSingle
717 (stmt->edata), exprNode_getfileloc(stmt));
719 ensuresTemp = constraintList_makeNew();
721 ensuresTemp = constraintList_add (ensuresTemp, con);
723 if (exprNode_isError(stmtList))
725 constraintList_free(*currentEnsures);
727 *currentEnsures = constraintList_copy(ensuresTemp);
728 constraintList_free(ensuresTemp);
734 temp = constraintList_logicalOr (*currentEnsures, ensuresTemp);
736 constraintList_free(*currentEnsures);
737 constraintList_free(ensuresTemp);
739 *currentEnsures = temp;
741 constraintList_free(*currentRequires);
743 *currentRequires = constraintList_makeNew();
748 we handle the case of ! exprNode_isCaseMarker above
749 the else if clause should always be true.
754 DPRINTF((message("returning from exprNode_doGenerateConstraintSwitch: (switch %s) %s currentRequires:"
755 "%s currentEnsures:%s",
756 exprNode_unparse(switchExpr), exprNode_unparse(body),
757 constraintList_unparse(*currentRequires), constraintList_unparse(*currentEnsures)
765 static void exprNode_generateConstraintSwitch (/*@notnull@*/ exprNode switchStmt)
767 constraintList constraintsRequires;
768 constraintList constraintsEnsures;
769 constraintList lastRequires;
770 constraintList lastEnsures;
775 switchExpr = exprData_getPairA (switchStmt->edata);
776 body = exprData_getPairB (switchStmt->edata);
778 if (!exprNode_isDefined (body))
783 DPRINTF((message("")));
785 if (body->kind == XPR_BLOCK)
786 body = exprData_getSingle(body->edata);
789 constraintsRequires = constraintList_undefined;
790 constraintsEnsures = constraintList_undefined;
792 lastRequires = constraintList_makeNew();
793 lastEnsures = constraintList_makeNew();
797 /* evans 2002-01-01: spurious warnings for these becuase of stack allocated storage */
798 exprNode_doGenerateConstraintSwitch (switchExpr, body, &lastRequires,
799 &lastEnsures, &constraintsRequires, &constraintsEnsures);
803 merge current and saved constraint with Logical Or...
804 make a constraint for ensures
807 constraintList_free(switchStmt->requiresConstraints);
808 constraintList_free(switchStmt->ensuresConstraints);
810 if (constraintList_isDefined(constraintsEnsures) && constraintList_isDefined(constraintsRequires))
812 switchStmt->ensuresConstraints = constraintList_logicalOr(constraintsEnsures, lastEnsures);
813 switchStmt->requiresConstraints = constraintList_mergeRequires(constraintsRequires, lastRequires);
814 constraintList_free (constraintsRequires);
815 constraintList_free (constraintsEnsures);
819 switchStmt->ensuresConstraints = constraintList_copy(lastEnsures);
820 switchStmt->requiresConstraints = constraintList_copy(lastRequires);
823 constraintList_free (lastRequires);
824 constraintList_free (lastEnsures);
826 DPRINTF(((message(" exprNode_generateConstraintSwitch returning requires: %s and ensures %s",
827 constraintList_unparse(switchStmt->requiresConstraints),
828 constraintList_unparse(switchStmt->ensuresConstraints)
833 static exprNode doSwitch (/*@returned@*/ /*@notnull@*/ exprNode e)
839 DPRINTF ((message ("doSwitch for: switch (%s) %s",
840 exprNode_unparse (exprData_getPairA (data)),
841 exprNode_unparse (exprData_getPairB (data)))));
843 body = exprData_getPairB (data);
844 exprNode_generateConstraintSwitch (e);
848 void exprNode_multiStatement (/*@dependent@*/ exprNode e)
854 exprNode p, trueBranch, falseBranch;
855 exprNode forPred, forBody;
860 DPRINTF((message ("exprNode_multistatement Analysising %s %s at", exprNode_unparse(e),
861 fileloc_unparse(exprNode_getfileloc(e)))));
863 if (exprNode_handleError (e))
876 forPred = exprData_getPairA (data);
877 forBody = exprData_getPairB (data);
879 /* First generate the constraints */
880 exprNode_generateConstraints (forPred);
881 exprNode_generateConstraints (forBody);
884 doFor (e, forPred, forBody);
889 exprNode_generateConstraints (exprData_getTripleInit (data));
890 test = exprData_getTripleTest (data);
891 exprNode_exprTraverse (test,FALSE, FALSE, exprNode_loc(e));
892 exprNode_generateConstraints (exprData_getTripleInc (data));
894 if (!exprNode_isError(test))
896 constraintList temp2;
897 temp2 = test->trueEnsuresConstraints;
898 test->trueEnsuresConstraints = exprNode_traversTrueEnsuresConstraints(test);
899 constraintList_free(temp2);
902 exprNode_generateConstraints (exprData_getTripleInc (data));
906 e1 = exprData_getPairA (data);
907 e2 = exprData_getPairB (data);
909 exprNode_exprTraverse (e1,
910 FALSE, FALSE, exprNode_loc(e1));
912 exprNode_generateConstraints (e2);
914 e = doWhile (e, e1, e2);
920 DPRINTF ((exprNode_unparse(e)));
921 e1 = exprData_getPairA (data);
922 e2 = exprData_getPairB (data);
924 exprNode_exprTraverse (e1, FALSE, FALSE, exprNode_loc(e1));
926 exprNode_generateConstraints (e2);
927 e = doIf (e, e1, e2);
931 DPRINTF(("Starting IFELSE"));
932 p = exprData_getTriplePred (data);
934 trueBranch = exprData_getTripleTrue (data);
935 falseBranch = exprData_getTripleFalse (data);
937 exprNode_exprTraverse (p,
938 FALSE, FALSE, exprNode_loc(p));
939 exprNode_generateConstraints (trueBranch);
940 exprNode_generateConstraints (falseBranch);
942 llassert (exprNode_isDefined (p));
943 temp = p->ensuresConstraints;
944 p->ensuresConstraints = exprNode_traversEnsuresConstraints (p);
945 constraintList_free(temp);
947 temp = p->requiresConstraints;
948 p->requiresConstraints = exprNode_traversRequiresConstraints (p);
949 constraintList_free(temp);
951 temp = p->trueEnsuresConstraints;
952 p->trueEnsuresConstraints = exprNode_traversTrueEnsuresConstraints(p);
953 constraintList_free(temp);
957 DPRINTF((message("p->trueEnsuresConstraints before substitue %s", constraintList_unparse(p->trueEnsuresConstraints) )
960 /*drl 10/10/2002 this is a bit of a hack but the reason why we do this is so that any function post conditions or similar things get applied correctly to each branch. e.g. in strlen(s) < 5 we want the trueEnsures to be maxRead(s) < 5*/
962 p->trueEnsuresConstraints = constraintList_substituteFreeTarget (p->trueEnsuresConstraints,
963 p->ensuresConstraints);
965 DPRINTF(( message ("p->trueEnsuresConstraints after substitue %s", constraintList_unparse(p->trueEnsuresConstraints) )
968 temp = p->falseEnsuresConstraints;
969 p->falseEnsuresConstraints = exprNode_traversFalseEnsuresConstraints(p);
970 constraintList_free(temp);
972 /*See comment on trueEnsures*/
973 p->falseEnsuresConstraints = constraintList_substituteFreeTarget (p->falseEnsuresConstraints,
974 p->ensuresConstraints);
976 e = doIfElse (e, p, trueBranch, falseBranch);
977 DPRINTF(("Done IFELSE"));
982 e2 = (exprData_getPairB (data));
983 e1 = (exprData_getPairA (data));
985 DPRINTF((message ("do { %s } while (%s)", exprNode_unparse(e2), exprNode_unparse(e1))));
986 exprNode_generateConstraints (e2);
987 exprNode_generateConstraints (e1);
988 e = exprNode_copyConstraints (e, e2);
989 DPRINTF ((message ("e = %s ", constraintList_unparse(e->requiresConstraints))));
997 tempExpr = exprData_getSingle (data);
999 exprNode_generateConstraints (tempExpr);
1001 if (exprNode_isDefined(tempExpr) )
1003 constraintList_free(e->requiresConstraints);
1004 e->requiresConstraints = constraintList_copy (tempExpr->requiresConstraints);
1005 constraintList_free(e->ensuresConstraints);
1006 e->ensuresConstraints = constraintList_copy (tempExpr->ensuresConstraints);
1020 exprNode_stmtList (e);
1030 static bool lltok_isBoolean_Op (lltok tok)
1032 /*this should really be a switch statement but
1033 I don't want to violate the abstraction
1034 maybe this should go in lltok.c */
1036 if (lltok_isEqOp (tok))
1040 if (lltok_isAndOp (tok))
1046 if (lltok_isOrOp (tok))
1051 if (lltok_isGt_Op (tok))
1055 if (lltok_isLt_Op (tok))
1060 if (lltok_isLe_Op (tok))
1065 if (lltok_isGe_Op (tok))
1075 static void exprNode_booleanTraverse (/*@dependent@*/ exprNode e, /*@unused@*/ bool definatelv, /*@unused@*/ bool definaterv, fileloc sequencePoint)
1081 constraintList tempList, temp;
1083 if (exprNode_isUndefined(e) )
1085 llassert (exprNode_isDefined(e) );
1091 tok = exprData_getOpTok (data);
1092 t1 = exprData_getOpA (data);
1093 t2 = exprData_getOpB (data);
1095 /* drl 3/2/2003 we know this because of the type of expression*/
1096 llassert( exprNode_isDefined(t1) && exprNode_isDefined(t2) );
1099 tempList = constraintList_undefined;
1101 /* arithmetic tests */
1103 if (lltok_isEqOp (tok))
1105 cons = constraint_makeEnsureEqual (t1, t2, sequencePoint);
1106 e->trueEnsuresConstraints = constraintList_add(e->trueEnsuresConstraints, cons);
1110 if (lltok_isLt_Op (tok))
1112 cons = constraint_makeEnsureLessThan (t1, t2, sequencePoint);
1113 e->trueEnsuresConstraints = constraintList_add(e->trueEnsuresConstraints, cons);
1114 cons = constraint_makeEnsureGreaterThanEqual (t1, t2, sequencePoint);
1115 e->falseEnsuresConstraints = constraintList_add(e->falseEnsuresConstraints, cons);
1118 if (lltok_isGe_Op (tok))
1120 cons = constraint_makeEnsureGreaterThanEqual (t1, t2, sequencePoint);
1121 e->trueEnsuresConstraints = constraintList_add(e->trueEnsuresConstraints, cons);
1123 cons = constraint_makeEnsureLessThan (t1, t2, sequencePoint);
1124 e->falseEnsuresConstraints = constraintList_add(e->falseEnsuresConstraints, cons);
1127 if (lltok_isGt_Op (tok))
1129 cons = constraint_makeEnsureGreaterThan (t1, t2, sequencePoint);
1130 e->trueEnsuresConstraints = constraintList_add(e->trueEnsuresConstraints, cons);
1131 cons = constraint_makeEnsureLessThanEqual (t1, t2, sequencePoint);
1132 e->falseEnsuresConstraints = constraintList_add(e->falseEnsuresConstraints, cons);
1135 if (lltok_isLe_Op (tok))
1137 cons = constraint_makeEnsureLessThanEqual (t1, t2, sequencePoint);
1138 e->trueEnsuresConstraints = constraintList_add(e->trueEnsuresConstraints, cons);
1140 cons = constraint_makeEnsureGreaterThan (t1, t2, sequencePoint);
1141 e->falseEnsuresConstraints = constraintList_add(e->falseEnsuresConstraints, cons);
1144 /* Logical operations */
1146 if (lltok_isAndOp (tok))
1149 tempList = constraintList_copy (t1->trueEnsuresConstraints);
1150 tempList = constraintList_addList (tempList, t2->trueEnsuresConstraints);
1151 e->trueEnsuresConstraints = constraintList_addListFree(e->trueEnsuresConstraints, tempList);
1153 /* false ensures: fens t1 or tens t1 and fens t2 */
1154 tempList = constraintList_copy (t1->trueEnsuresConstraints);
1155 tempList = constraintList_addList (tempList, t2->falseEnsuresConstraints);
1157 tempList = constraintList_logicalOr (tempList, t1->falseEnsuresConstraints);
1158 constraintList_free (temp);
1160 /* evans - was constraintList_addList - memory leak detected by splint */
1161 e->falseEnsuresConstraints = constraintList_addListFree (e->falseEnsuresConstraints, tempList);
1163 else if (lltok_isOrOp (tok))
1166 tempList = constraintList_copy (t1->falseEnsuresConstraints);
1167 tempList = constraintList_addList (tempList, t2->falseEnsuresConstraints);
1168 e->falseEnsuresConstraints = constraintList_addListFree(e->falseEnsuresConstraints, tempList);
1170 /* true ensures: tens t1 or fens t1 and tens t2 */
1171 tempList = constraintList_copy (t1->falseEnsuresConstraints);
1172 tempList = constraintList_addList (tempList, t2->trueEnsuresConstraints);
1175 tempList = constraintList_logicalOr (tempList, t1->trueEnsuresConstraints);
1176 constraintList_free(temp);
1178 e->trueEnsuresConstraints = constraintList_addListFree(e->trueEnsuresConstraints, tempList);
1179 tempList = constraintList_undefined;
1183 DPRINTF((message("%s is not a boolean operation", lltok_unparse(tok))));
1187 void exprNode_exprTraverse (/*@dependent@*/ exprNode e, bool definatelv, bool definaterv, /*@observer@*/ /*@temp@*/ fileloc sequencePoint)
1189 exprNode t1, t2, fcn;
1191 bool handledExprNode;
1195 constraintList temp;
1197 if (exprNode_isError(e))
1202 DPRINTF((message ("exprNode_exprTraverset Analysising %s %s at", exprNode_unparse(e),
1203 fileloc_unparse(exprNode_getfileloc(e)))));
1205 /*e->requiresConstraints = constraintList_makeNew();
1206 e->ensuresConstraints = constraintList_makeNew();
1207 e->trueEnsuresConstraints = constraintList_makeNew();;
1208 e->falseEnsuresConstraints = constraintList_makeNew();;
1211 if (exprNode_isUnhandled (e))
1216 handledExprNode = TRUE;
1223 t1 = exprData_getSingle (data);
1224 exprNode_exprTraverse (t1, definatelv, definaterv, sequencePoint);
1225 e = exprNode_copyConstraints (e, t1);
1232 t1 = (exprData_getPairA (data));
1233 t2 = (exprData_getPairB (data));
1234 cons = constraint_makeWriteSafeExprNode (t1, t2);
1238 t1 = (exprData_getPairA (data));
1239 t2 = (exprData_getPairB (data));
1240 cons = constraint_makeReadSafeExprNode (t1, t2);
1243 e->requiresConstraints = constraintList_add(e->requiresConstraints, cons);
1244 cons = constraint_makeEnsureMaxReadAtLeast (t1, t2, sequencePoint);
1245 e->ensuresConstraints = constraintList_add(e->ensuresConstraints, cons);
1247 cons = constraint_makeEnsureLteMaxRead (t2, t1);
1248 e->trueEnsuresConstraints = constraintList_add(e->trueEnsuresConstraints, cons);
1250 exprNode_exprTraverse (exprData_getPairA (data), FALSE, TRUE, sequencePoint);
1251 exprNode_exprTraverse (exprData_getPairB (data), FALSE, TRUE, sequencePoint);
1256 exprNode_exprTraverse (exprData_getUopNode (e->edata), definatelv, definaterv, sequencePoint);
1266 t = exprData_getInitId (data);
1267 ue = usymtab_lookup (idDecl_observeId (t));
1268 lhs = exprNode_createId (ue);
1270 t2 = exprData_getInitNode (data);
1272 /* DPRINTF(((message("initialization: %s = %s",
1273 exprNode_unparse(lhs),
1274 exprNode_unparse(t2)
1278 exprNode_exprTraverse (t2, definatelv, TRUE, sequencePoint);
1280 /* this test is nessecary because some expressions generate a null expression node. function pointer do that -- drl */
1281 if ((!exprNode_isError (e)) && (!exprNode_isError(t2)))
1283 cons = constraint_makeEnsureEqual (e, t2, sequencePoint);
1284 e->ensuresConstraints = constraintList_add(e->ensuresConstraints, cons);
1290 t1 = exprData_getOpA (data);
1291 t2 = exprData_getOpB (data);
1292 exprNode_exprTraverse (t1, TRUE, definaterv, sequencePoint);
1293 exprNode_exprTraverse (t2, definatelv, TRUE, sequencePoint);
1295 /* this test is nessecary because some expressions generate a null expression node. function pointer do that -- drl */
1296 if ((!exprNode_isError (t1)) && (!exprNode_isError(t2)))
1298 cons = constraint_makeEnsureEqual (t1, t2, sequencePoint);
1299 e->ensuresConstraints = constraintList_add(e->ensuresConstraints, cons);
1303 t1 = exprData_getOpA (data);
1304 t2 = exprData_getOpB (data);
1305 tok = exprData_getOpTok (data);
1307 if (lltok_getTok (tok) == ADD_ASSIGN)
1309 exprNode_exprTraverse (t1, TRUE, definaterv, sequencePoint);
1310 exprNode_exprTraverse (t2, definatelv, TRUE, sequencePoint);
1312 cons = constraint_makeAddAssign (t1, t2, sequencePoint);
1313 e->ensuresConstraints = constraintList_add(e->ensuresConstraints, cons);
1315 else if (lltok_getTok (tok) == SUB_ASSIGN)
1317 exprNode_exprTraverse (t1, TRUE, definaterv, sequencePoint);
1318 exprNode_exprTraverse (t2, definatelv, TRUE, sequencePoint);
1320 cons = constraint_makeSubtractAssign (t1, t2, sequencePoint);
1321 e->ensuresConstraints = constraintList_add(e->ensuresConstraints, cons);
1325 exprNode_exprTraverse (t1, definatelv, definaterv, sequencePoint);
1326 exprNode_exprTraverse (t2, definatelv, definaterv, sequencePoint);
1329 if (lltok_isBoolean_Op (tok))
1330 exprNode_booleanTraverse (e, definatelv, definaterv, sequencePoint);
1334 /*drl 4-11-03 I think this is the same as the next case...*/
1340 C standard says operand to sizeof isn't evaluated unless
1341 its a variable length array. So we don't generate constraints.
1347 fcn = exprData_getFcn(data);
1349 exprNode_exprTraverse (fcn, definatelv, definaterv, sequencePoint);
1350 DPRINTF ((message ("Got call that %s (%s) ", exprNode_unparse(fcn), exprNodeList_unparse (exprData_getArgs (data)))));
1352 llassert( exprNode_isDefined(fcn) );
1354 fcn->requiresConstraints = constraintList_addListFree (fcn->requiresConstraints,
1355 checkCall (fcn, exprData_getArgs (data) ));
1357 fcn->ensuresConstraints = constraintList_addListFree (fcn->ensuresConstraints,
1358 exprNode_getPostConditions(fcn, exprData_getArgs (data),e ));
1360 t1 = exprNode_createNew (exprNode_getType (e));
1361 checkArgumentList (t1, exprData_getArgs(data), sequencePoint);
1362 exprNode_mergeResolve (e, t1, fcn);
1367 exprNode_exprTraverse (exprData_getSingle (data), definatelv, definaterv, sequencePoint);
1370 case XPR_NULLRETURN:
1376 exprNode_exprTraverse (exprData_getFieldNode (data), definatelv, definaterv, sequencePoint);
1380 exprNode_exprTraverse (exprData_getFieldNode (data), definatelv, definaterv, sequencePoint);
1383 case XPR_STRINGLITERAL:
1392 t1 = exprData_getUopNode(data);
1395 /* drl 3/2/2003 we know this because of the type of expression*/
1396 llassert( exprNode_isDefined(t1) );
1399 tok = (exprData_getUopTok (data));
1400 exprNode_exprTraverse (t1, definatelv, definaterv, sequencePoint);
1401 /*handle * pointer access */
1402 if (lltok_isIncOp (tok))
1404 DPRINTF(("doing ++(var)"));
1405 t1 = exprData_getUopNode (data);
1406 cons = constraint_makeMaxSetSideEffectPostIncrement (t1, sequencePoint);
1407 e->ensuresConstraints = constraintList_add (e->ensuresConstraints, cons);
1409 else if (lltok_isDecOp (tok))
1411 DPRINTF(("doing --(var)"));
1412 t1 = exprData_getUopNode (data);
1413 cons = constraint_makeMaxSetSideEffectPostDecrement (t1, sequencePoint);
1414 e->ensuresConstraints = constraintList_add (e->ensuresConstraints, cons);
1416 else if (lltok_isMult(tok ))
1420 cons = constraint_makeWriteSafeInt (t1, 0);
1424 cons = constraint_makeReadSafeInt (t1, 0);
1426 e->requiresConstraints = constraintList_add(e->requiresConstraints, cons);
1428 else if (lltok_isNotOp (tok))
1431 constraintList_free(e->trueEnsuresConstraints);
1433 e->trueEnsuresConstraints = constraintList_copy (t1->falseEnsuresConstraints);
1434 constraintList_free(e->falseEnsuresConstraints);
1435 e->falseEnsuresConstraints = constraintList_copy (t1->trueEnsuresConstraints);
1438 else if (lltok_isAmpersand_Op (tok))
1442 else if (lltok_isMinus_Op (tok))
1446 else if (lltok_isExcl_Op (tok))
1450 else if (lltok_isTilde_Op (tok))
1456 llcontbug (message("Unsupported preop in %s", exprNode_unparse(e)));
1462 exprNode_exprTraverse (exprData_getUopNode (data), TRUE,
1463 definaterv, sequencePoint);
1465 if (lltok_isIncOp (exprData_getUopTok (data)))
1467 DPRINTF(("doing ++"));
1468 t1 = exprData_getUopNode (data);
1469 cons = constraint_makeMaxSetSideEffectPostIncrement (t1, sequencePoint);
1470 e->ensuresConstraints = constraintList_add (e->ensuresConstraints, cons);
1472 if (lltok_isDecOp (exprData_getUopTok (data)))
1474 DPRINTF(("doing --"));
1475 t1 = exprData_getUopNode (data);
1476 cons = constraint_makeMaxSetSideEffectPostDecrement (t1, sequencePoint);
1477 e->ensuresConstraints = constraintList_add (e->ensuresConstraints, cons);
1482 t2 = exprData_getCastNode (data);
1483 DPRINTF ((message ("Examining cast (%q)%s",
1484 qtype_unparse (exprData_getCastType (data)),
1485 exprNode_unparse (t2))
1487 exprNode_exprTraverse (t2, definatelv, definaterv, sequencePoint);
1493 exprNode pred, trueBranch, falseBranch;
1495 pred = exprData_getTriplePred (data);
1496 trueBranch = exprData_getTripleTrue (data);
1497 falseBranch = exprData_getTripleFalse (data);
1499 llassert (exprNode_isDefined (pred));
1500 llassert (exprNode_isDefined (trueBranch));
1501 llassert (exprNode_isDefined (falseBranch));
1503 exprNode_exprTraverse (pred, FALSE, TRUE, sequencePoint);
1505 temp = pred->ensuresConstraints;
1506 pred->ensuresConstraints = exprNode_traversEnsuresConstraints(pred);
1507 constraintList_free(temp);
1509 temp = pred->requiresConstraints;
1510 pred->requiresConstraints = exprNode_traversRequiresConstraints(pred);
1511 constraintList_free(temp);
1513 temp = pred->trueEnsuresConstraints;
1514 pred->trueEnsuresConstraints = exprNode_traversTrueEnsuresConstraints(pred);
1515 constraintList_free(temp);
1517 temp = pred->falseEnsuresConstraints;
1518 pred->falseEnsuresConstraints = exprNode_traversFalseEnsuresConstraints(pred);
1519 constraintList_free(temp);
1521 exprNode_exprTraverse (trueBranch, FALSE, TRUE, sequencePoint);
1523 temp = trueBranch->ensuresConstraints;
1524 trueBranch->ensuresConstraints = exprNode_traversEnsuresConstraints(trueBranch);
1525 constraintList_free(temp);
1527 temp = trueBranch->requiresConstraints;
1528 trueBranch->requiresConstraints = exprNode_traversRequiresConstraints(trueBranch);
1529 constraintList_free(temp);
1532 temp = trueBranch->trueEnsuresConstraints;
1533 trueBranch->trueEnsuresConstraints = exprNode_traversTrueEnsuresConstraints(trueBranch);
1534 constraintList_free(temp);
1536 temp = trueBranch->falseEnsuresConstraints;
1537 trueBranch->falseEnsuresConstraints = exprNode_traversFalseEnsuresConstraints(trueBranch);
1538 constraintList_free(temp);
1540 exprNode_exprTraverse (falseBranch, FALSE, TRUE, sequencePoint);
1542 temp = falseBranch->ensuresConstraints;
1543 falseBranch->ensuresConstraints = exprNode_traversEnsuresConstraints(falseBranch);
1544 constraintList_free(temp);
1547 temp = falseBranch->requiresConstraints;
1548 falseBranch->requiresConstraints = exprNode_traversRequiresConstraints(falseBranch);
1549 constraintList_free(temp);
1551 temp = falseBranch->trueEnsuresConstraints;
1552 falseBranch->trueEnsuresConstraints = exprNode_traversTrueEnsuresConstraints(falseBranch);
1553 constraintList_free(temp);
1555 temp = falseBranch->falseEnsuresConstraints;
1556 falseBranch->falseEnsuresConstraints = exprNode_traversFalseEnsuresConstraints(falseBranch);
1557 constraintList_free(temp);
1559 /* if pred is true e equals true otherwise pred equals false */
1561 cons = constraint_makeEnsureEqual (e, trueBranch, sequencePoint);
1562 trueBranch->ensuresConstraints = constraintList_add(trueBranch->ensuresConstraints, cons);
1564 cons = constraint_makeEnsureEqual (e, trueBranch, sequencePoint);
1565 falseBranch->ensuresConstraints = constraintList_add(falseBranch->ensuresConstraints, cons);
1567 e = doIfElse (e, pred, trueBranch, falseBranch);
1572 t1 = exprData_getPairA (data);
1573 t2 = exprData_getPairB (data);
1574 /* we essiantially treat this like expr1; expr2
1575 of course sequencePoint isn't adjusted so this isn't completely accurate
1577 exprNode_exprTraverse (t1, FALSE, FALSE, sequencePoint);
1578 exprNode_exprTraverse (t2, definatelv, definaterv, sequencePoint);
1579 exprNode_mergeResolve (e, t1, t2);
1583 handledExprNode = FALSE;
1586 e->requiresConstraints = constraintList_preserveOrig (e->requiresConstraints);
1587 e->ensuresConstraints = constraintList_preserveOrig (e->ensuresConstraints);
1588 e->requiresConstraints = constraintList_addGeneratingExpr (e->requiresConstraints, e);
1590 e->ensuresConstraints = constraintList_addGeneratingExpr (e->ensuresConstraints, e);
1593 e->requiresConstraints = constraintList_removeSurpressed(e->requiresConstraints);
1595 DPRINTF((message ("ensures constraints for %s are %s", exprNode_unparse(e), constraintList_unparseDetailed(e->ensuresConstraints))));
1597 DPRINTF((message ("Requires constraints for %s are %s", exprNode_unparse(e), constraintList_unparseDetailed(e->ensuresConstraints))));
1599 DPRINTF((message ("trueEnsures constraints for %s are %s", exprNode_unparse(e), constraintList_unparseDetailed(e->trueEnsuresConstraints))));
1601 DPRINTF((message ("falseEnsures constraints for %s are %s", exprNode_unparse(e), constraintList_unparseDetailed(e->falseEnsuresConstraints))));
1607 constraintList exprNode_traversTrueEnsuresConstraints (exprNode e)
1611 bool handledExprNode;
1615 if (exprNode_handleError (e))
1617 ret = constraintList_makeNew();
1621 ret = constraintList_copy (e->trueEnsuresConstraints);
1623 handledExprNode = TRUE;
1630 t1 = exprData_getSingle (data);
1631 ret = constraintList_addListFree (ret, exprNode_traversTrueEnsuresConstraints (t1));
1636 ret = constraintList_addListFree (ret,
1637 exprNode_traversTrueEnsuresConstraints
1638 (exprData_getPairA (data)));
1640 ret = constraintList_addListFree (ret,
1641 exprNode_traversTrueEnsuresConstraints
1642 (exprData_getPairB (data)));
1646 ret = constraintList_addListFree (ret,
1647 exprNode_traversTrueEnsuresConstraints
1648 (exprData_getUopNode (data)));
1652 ret = constraintList_addListFree (ret, exprNode_traversTrueEnsuresConstraints
1653 (exprData_getUopNode (data)));
1657 ret = constraintList_addListFree (ret,
1658 exprNode_traversTrueEnsuresConstraints
1659 (exprData_getInitNode (data)));
1664 ret = constraintList_addListFree (ret,
1665 exprNode_traversTrueEnsuresConstraints
1666 (exprData_getOpA (data)));
1668 ret = constraintList_addListFree (ret,
1669 exprNode_traversTrueEnsuresConstraints
1670 (exprData_getOpB (data)));
1673 ret = constraintList_addListFree (ret,
1674 exprNode_traversTrueEnsuresConstraints
1675 (exprData_getOpA (data)));
1677 ret = constraintList_addListFree (ret,
1678 exprNode_traversTrueEnsuresConstraints
1679 (exprData_getOpB (data)));
1686 ret = constraintList_addListFree (ret,
1687 exprNode_traversTrueEnsuresConstraints
1688 (exprData_getSingle (data)));
1692 ret = constraintList_addListFree (ret,
1693 exprNode_traversTrueEnsuresConstraints
1694 (exprData_getFcn (data)));
1698 ret = constraintList_addListFree (ret,
1699 exprNode_traversTrueEnsuresConstraints
1700 (exprData_getSingle (data)));
1703 case XPR_NULLRETURN:
1707 ret = constraintList_addListFree (ret,
1708 exprNode_traversTrueEnsuresConstraints
1709 (exprData_getFieldNode (data)));
1713 ret = constraintList_addListFree (ret,
1714 exprNode_traversTrueEnsuresConstraints
1715 (exprData_getFieldNode (data)));
1718 case XPR_STRINGLITERAL:
1725 ret = constraintList_addListFree (ret,
1726 exprNode_traversTrueEnsuresConstraints
1727 (exprData_getUopNode (data)));
1732 ret = constraintList_addListFree (ret,
1733 exprNode_traversTrueEnsuresConstraints
1734 (exprData_getCastNode (data)));
1744 constraintList exprNode_traversFalseEnsuresConstraints (exprNode e)
1747 bool handledExprNode;
1751 if (exprNode_handleError (e))
1753 ret = constraintList_makeNew();
1757 ret = constraintList_copy (e->falseEnsuresConstraints);
1758 handledExprNode = TRUE;
1764 t1 = exprData_getSingle (data);
1765 ret = constraintList_addListFree (ret,exprNode_traversFalseEnsuresConstraints (t1));
1770 ret = constraintList_addListFree (ret,
1771 exprNode_traversFalseEnsuresConstraints
1772 (exprData_getPairA (data)));
1774 ret = constraintList_addListFree (ret,
1775 exprNode_traversFalseEnsuresConstraints
1776 (exprData_getPairB (data)));
1780 ret = constraintList_addListFree (ret,
1781 exprNode_traversFalseEnsuresConstraints
1782 (exprData_getUopNode (data)));
1786 ret = constraintList_addListFree (ret, exprNode_traversFalseEnsuresConstraints
1787 (exprData_getUopNode (data)));
1790 ret = constraintList_addListFree (ret,
1791 exprNode_traversFalseEnsuresConstraints
1792 ( exprData_getInitNode (data)));
1796 ret = constraintList_addListFree (ret,
1797 exprNode_traversFalseEnsuresConstraints
1798 (exprData_getOpA (data)));
1800 ret = constraintList_addListFree (ret,
1801 exprNode_traversFalseEnsuresConstraints
1802 (exprData_getOpB (data)));
1805 ret = constraintList_addListFree (ret,
1806 exprNode_traversFalseEnsuresConstraints
1807 (exprData_getOpA (data)));
1809 ret = constraintList_addListFree (ret,
1810 exprNode_traversFalseEnsuresConstraints
1811 (exprData_getOpB (data)));
1818 ret = constraintList_addListFree (ret,
1819 exprNode_traversFalseEnsuresConstraints
1820 (exprData_getSingle (data)));
1824 ret = constraintList_addListFree (ret,
1825 exprNode_traversFalseEnsuresConstraints
1826 (exprData_getFcn (data)));
1830 ret = constraintList_addListFree (ret,
1831 exprNode_traversFalseEnsuresConstraints
1832 (exprData_getSingle (data)));
1835 case XPR_NULLRETURN:
1839 ret = constraintList_addListFree (ret,
1840 exprNode_traversFalseEnsuresConstraints
1841 (exprData_getFieldNode (data)));
1845 ret = constraintList_addListFree (ret,
1846 exprNode_traversFalseEnsuresConstraints
1847 (exprData_getFieldNode (data)));
1850 case XPR_STRINGLITERAL:
1857 ret = constraintList_addListFree (ret,
1858 exprNode_traversFalseEnsuresConstraints
1859 (exprData_getUopNode (data)));
1864 ret = constraintList_addListFree (ret,
1865 exprNode_traversFalseEnsuresConstraints
1866 (exprData_getCastNode (data)));
1877 /* walk down the tree and get all requires Constraints in each subexpression*/
1878 /*@only@*/ constraintList exprNode_traversRequiresConstraints (exprNode e)
1882 bool handledExprNode;
1886 if (exprNode_handleError (e))
1888 ret = constraintList_makeNew();
1892 ret = constraintList_copy (e->requiresConstraints);
1893 handledExprNode = TRUE;
1899 t1 = exprData_getSingle (data);
1900 ret = constraintList_addListFree (ret, exprNode_traversRequiresConstraints (t1));
1905 ret = constraintList_addListFree (ret,
1906 exprNode_traversRequiresConstraints
1907 (exprData_getPairA (data)));
1909 ret = constraintList_addListFree (ret,
1910 exprNode_traversRequiresConstraints
1911 (exprData_getPairB (data)));
1915 ret = constraintList_addListFree (ret,
1916 exprNode_traversRequiresConstraints
1917 (exprData_getUopNode (data)));
1921 ret = constraintList_addListFree (ret, exprNode_traversRequiresConstraints
1922 (exprData_getUopNode (data)));
1925 ret = constraintList_addListFree (ret,
1926 exprNode_traversRequiresConstraints
1927 (exprData_getInitNode (data)));
1931 ret = constraintList_addListFree (ret,
1932 exprNode_traversRequiresConstraints
1933 (exprData_getOpA (data)));
1935 ret = constraintList_addListFree (ret,
1936 exprNode_traversRequiresConstraints
1937 (exprData_getOpB (data)));
1940 ret = constraintList_addListFree (ret,
1941 exprNode_traversRequiresConstraints
1942 (exprData_getOpA (data)));
1944 ret = constraintList_addListFree (ret,
1945 exprNode_traversRequiresConstraints
1946 (exprData_getOpB (data)));
1953 ret = constraintList_addListFree (ret,
1954 exprNode_traversRequiresConstraints
1955 (exprData_getSingle (data)));
1959 ret = constraintList_addListFree (ret,
1960 exprNode_traversRequiresConstraints
1961 (exprData_getFcn (data)));
1965 ret = constraintList_addListFree (ret,
1966 exprNode_traversRequiresConstraints
1967 (exprData_getSingle (data)));
1970 case XPR_NULLRETURN:
1974 ret = constraintList_addListFree (ret,
1975 exprNode_traversRequiresConstraints
1976 (exprData_getFieldNode (data)));
1980 ret = constraintList_addListFree (ret,
1981 exprNode_traversRequiresConstraints
1982 (exprData_getFieldNode (data)));
1985 case XPR_STRINGLITERAL:
1992 ret = constraintList_addListFree (ret,
1993 exprNode_traversRequiresConstraints
1994 (exprData_getUopNode (data)));
1999 ret = constraintList_addListFree (ret,
2000 exprNode_traversRequiresConstraints
2001 (exprData_getCastNode (data)));
2012 /* walk down the tree and get all Ensures Constraints in each subexpression*/
2013 /*@only@*/ constraintList exprNode_traversEnsuresConstraints (exprNode e)
2017 bool handledExprNode;
2021 if (exprNode_handleError (e))
2023 ret = constraintList_makeNew();
2027 ret = constraintList_copy (e->ensuresConstraints);
2028 handledExprNode = TRUE;
2032 DPRINTF ((message ("exprnode_traversEnsuresConstraints call for %s with "
2033 "constraintList of %s",
2034 exprNode_unparse (e),
2035 constraintList_unparse(e->ensuresConstraints)
2043 t1 = exprData_getSingle (data);
2044 ret = constraintList_addListFree (ret,exprNode_traversEnsuresConstraints (t1));
2048 ret = constraintList_addListFree (ret,
2049 exprNode_traversEnsuresConstraints
2050 (exprData_getPairA (data)));
2052 ret = constraintList_addListFree (ret,
2053 exprNode_traversEnsuresConstraints
2054 (exprData_getPairB (data)));
2057 ret = constraintList_addListFree (ret,
2058 exprNode_traversEnsuresConstraints
2059 (exprData_getUopNode (data)));
2063 ret = constraintList_addListFree (ret, exprNode_traversEnsuresConstraints
2064 (exprData_getUopNode (data)));
2068 ret = constraintList_addListFree (ret,
2069 exprNode_traversEnsuresConstraints
2070 (exprData_getInitNode (data)));
2075 ret = constraintList_addListFree (ret,
2076 exprNode_traversEnsuresConstraints
2077 (exprData_getOpA (data)));
2079 ret = constraintList_addListFree (ret,
2080 exprNode_traversEnsuresConstraints
2081 (exprData_getOpB (data)));
2084 ret = constraintList_addListFree (ret,
2085 exprNode_traversEnsuresConstraints
2086 (exprData_getOpA (data)));
2088 ret = constraintList_addListFree (ret,
2089 exprNode_traversEnsuresConstraints
2090 (exprData_getOpB (data)));
2096 ret = constraintList_addListFree (ret,
2097 exprNode_traversEnsuresConstraints
2098 (exprData_getSingle (data)));
2101 ret = constraintList_addListFree (ret,
2102 exprNode_traversEnsuresConstraints
2103 (exprData_getFcn (data)));
2106 ret = constraintList_addListFree (ret,
2107 exprNode_traversEnsuresConstraints
2108 (exprData_getSingle (data)));
2110 case XPR_NULLRETURN:
2113 ret = constraintList_addListFree (ret,
2114 exprNode_traversEnsuresConstraints
2115 (exprData_getFieldNode (data)));
2118 ret = constraintList_addListFree (ret,
2119 exprNode_traversEnsuresConstraints
2120 (exprData_getFieldNode (data)));
2122 case XPR_STRINGLITERAL:
2127 ret = constraintList_addListFree (ret,
2128 exprNode_traversEnsuresConstraints
2129 (exprData_getUopNode (data)));
2132 ret = constraintList_addListFree (ret,
2133 exprNode_traversEnsuresConstraints
2134 (exprData_getCastNode (data)));
2140 DPRINTF((message ("exprnode_traversEnsuresConstraints call for %s with "
2141 "constraintList of is returning %s",
2142 exprNode_unparse (e),
2143 constraintList_unparse(ret))));
2148 /*drl moved out of constraintResolve.c 07-02-001 */
2149 void checkArgumentList (/*@out@*/ exprNode temp, exprNodeList arglist,
2150 fileloc sequencePoint)
2153 llassert(temp != NULL );
2155 temp->requiresConstraints = constraintList_makeNew();
2156 temp->ensuresConstraints = constraintList_makeNew();
2157 temp->trueEnsuresConstraints = constraintList_makeNew();
2158 temp->falseEnsuresConstraints = constraintList_makeNew();
2160 exprNodeList_elements (arglist, el)
2162 constraintList temp2;
2164 llassert(exprNode_isDefined(el) );
2166 exprNode_exprTraverse (el, FALSE, FALSE, sequencePoint);
2167 temp2 = el->requiresConstraints;
2168 el->requiresConstraints = exprNode_traversRequiresConstraints(el);
2169 constraintList_free(temp2);
2171 temp2 = el->ensuresConstraints;
2172 el->ensuresConstraints = exprNode_traversEnsuresConstraints(el);
2173 constraintList_free(temp2);
2175 temp->requiresConstraints = constraintList_addList(temp->requiresConstraints,
2176 el->requiresConstraints);
2178 temp->ensuresConstraints = constraintList_addList(temp->ensuresConstraints,
2179 el->ensuresConstraints);
2181 end_exprNodeList_elements;
2185 /*drl moved out of constraintResolve.c 07-03-001 */
2186 constraintList exprNode_getPostConditions (exprNode fcn, exprNodeList arglist, exprNode fcnCall)
2188 constraintList postconditions;
2190 DPRINTF((message ("Got call that %s (%s) ", exprNode_unparse(fcn), exprNodeList_unparse (arglist))));
2192 temp = exprNode_getUentry (fcn);
2194 postconditions = uentry_getFcnPostconditions (temp);
2196 if (constraintList_isDefined (postconditions))
2198 postconditions = constraintList_doSRefFixConstraintParam (postconditions, arglist);
2199 postconditions = constraintList_doFixResult (postconditions, fcnCall);
2203 postconditions = constraintList_makeNew();
2206 return postconditions;
2210 comment this out for now
2211 we'll include it in a production release when its stable...
2213 void findStructs (exprNodeList arglist)
2219 message("doing findStructs: %s", exprNodeList_unparse(arglist))
2223 exprNodeList_elements(arglist, expr)
2225 ct = exprNode_getType(expr);
2227 rt = ctype_realType (ct);
2229 if (ctype_isStruct (rt))
2230 TPRINTF((message("Found structure %s", exprNode_unparse(expr))
2232 if (hasInvariants(ct))
2234 constraintList invars;
2236 invars = getInvariants(ct);
2239 TPRINTF((message ("findStructs has invariants %s ", constraintList_unparse (invars))
2242 invars = constraintList_doSRefFixStructConstraint(invars, exprNode_getSref(expr), ct);
2245 TPRINTF((message ("findStructs finded invariants to be %s ", constraintList_unparse (invars))
2249 end_exprNodeList_elements;
2254 /*drl moved out of constraintResolve.c 07-02-001 */
2255 constraintList checkCall (/*@dependent@*/ exprNode fcn, exprNodeList arglist)
2257 constraintList preconditions;
2259 DPRINTF((message ("Got call that %s (%s) ", exprNode_unparse(fcn), exprNodeList_unparse (arglist))));
2261 temp = exprNode_getUentry (fcn);
2263 preconditions = uentry_getFcnPreconditions (temp);
2265 if (constraintList_isDefined(preconditions))
2267 preconditions = constraintList_togglePost (preconditions);
2268 preconditions = constraintList_preserveCallInfo(preconditions, fcn);
2269 preconditions = constraintList_doSRefFixConstraintParam (preconditions, arglist);
2273 if (constraintList_isUndefined(preconditions))
2274 preconditions = constraintList_makeNew();
2277 if (context_getFlag (FLG_IMPLICTCONSTRAINT) )
2281 uentryList_elements (arglist, el)
2284 TPRINTF((message("setImplictfcnConstraints doing: %s", uentry_unparse(el) ) ));
2286 s = uentry_getSref(el);
2287 if (sRef_isReference (s) )
2289 TPRINTF((message ("%s is a pointer", sRef_unparse(s) ) ));
2293 TPRINTF((message ("%s is NOT a pointer", sRef_unparse(s) ) ));
2296 //chagned this from MaxSet(s) == 0 to MaxSet(s) >= 0
2297 c = constraint_makeSRefWriteSafeInt (s, 0);
2299 implicitFcnConstraints = constraintList_add(implicitFcnConstraints , c);
2301 //drl 10/23/2002 added support for out
2302 if (!uentry_isOut(el) )
2304 c = constraint_makeSRefReadSafeInt (s, 0);
2305 implicitFcnConstraints = constraintList_add(implicitFcnConstraints , c);
2313 DPRINTF ((message("Done checkCall\n")));
2314 DPRINTF ((message("Returning list %q ", constraintList_unparseDetailed(preconditions))));
2317 drl we're going to comment this out for now
2318 we'll include it if we're sure it's working
2320 findStructs(arglist);
2323 return preconditions;
2326 /*drl added this function 10.29.001
2327 takes an exprNode of the form const + const
2331 I'm a bit nervous about modifying the exprNode
2332 but this is the easy way to do this
2333 If I have time I'd like to cause the exprNode to get created correctly in the first place */
2334 void exprNode_findValue(exprNode e)
2341 llassert(exprNode_isDefined(e) );
2345 if (exprNode_hasValue(e))
2348 if (e->kind == XPR_OP)
2350 t1 = exprData_getOpA (data);
2351 t2 = exprData_getOpB (data);
2352 tok = exprData_getOpTok (data);
2354 exprNode_findValue(t1);
2355 exprNode_findValue(t2);
2357 if (!(exprNode_knownIntValue(t1) && (exprNode_knownIntValue(t2))))
2360 if (lltok_isPlus_Op (tok))
2364 v1 = exprNode_getLongValue(t1);
2365 v2 = exprNode_getLongValue(t2);
2367 if (multiVal_isDefined(e->val))
2368 multiVal_free (e->val);
2370 e->val = multiVal_makeInt (v1 + v2);
2373 if (lltok_isMinus_Op (tok))
2377 v1 = exprNode_getLongValue(t1);
2378 v2 = exprNode_getLongValue(t2);
2380 if (multiVal_isDefined(e->val))
2382 multiVal_free (e->val);
2385 e->val = multiVal_makeInt (v1 - v2);
2388 /*drl I should really do * and / at some point */