X-Git-Url: http://andersk.mit.edu/gitweb/splint.git/blobdiff_plain/bf92e32cf4958be7a9035826b51d0ea8bba57ded..061ece7d6fedbde47030222fea74b575c12707dc:/src/constraintGeneration.c diff --git a/src/constraintGeneration.c b/src/constraintGeneration.c index ed0bbd7..3a94efd 100644 --- a/src/constraintGeneration.c +++ b/src/constraintGeneration.c @@ -1,36 +1,63 @@ +/* +** Splint - annotation-assisted static program checker +** Copyright (C) 1994-2003 University of Virginia, +** Massachusetts Institute of Technology +** +** This program is free software; you can redistribute it and/or modify it +** under the terms of the GNU General Public License as published by the +** Free Software Foundation; either version 2 of the License, or (at your +** option) any later version. +** +** This program is distributed in the hope that it will be useful, but +** WITHOUT ANY WARRANTY; without even the implied warranty of +** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +** General Public License for more details. +** +** The GNU General Public License is available from http://www.gnu.org/ or +** the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, +** MA 02111-1307, USA. +** +** For information on splint: info@splint.org +** To report a bug: splint-bug@splint.org +** For more information: http://www.splint.org +*/ /* -** constraintList.c +** constraintGeneration.c */ +/* #define DEBUGPRINT 1 */ + # include /* for isdigit */ -# include "lclintMacros.nf" +# include "splintMacros.nf" # include "basic.h" -# include "cgrammar.h" + # include "cgrammar_tokens.h" # include "exprChecks.h" -# include "aliasChecks.h" # include "exprNodeSList.h" -# include "exprData.i" -void /*@alt bool@*/ exprNode_generateConstraints (/*@temp@*/ exprNode e); -static bool exprNode_handleError( exprNode p_e); +/*drl We need to access the internal representation of exprNode + because these functions walk down the parse tree and need a richer +information than is accessible through the exprNode interface.*/ + +/*@access exprNode@*/ -//static cstring exprNode_findConstraints ( exprNode p_e); -static bool exprNode_isMultiStatement(exprNode p_e); -static bool exprNode_multiStatement (exprNode p_e); -bool exprNode_exprTraverse (exprNode e, bool definatelv, bool definaterv, fileloc sequencePoint); -//static void exprNode_constraintPropagateUp (exprNode p_e); -constraintList exprNode_traversRequiresConstraints (exprNode e); -constraintList exprNode_traversEnsuresConstraints (exprNode e); -void mergeResolve (exprNode parent, exprNode child1, exprNode child2); +static /*@nullwhentrue@*/ bool exprNode_handleError (/*@temp@*/ exprNode p_e); +static void exprNode_stmt (/*@temp@*/ /*@temp@*/ exprNode p_e); +static void exprNode_multiStatement (/*@temp@*/ exprNode p_e); - -bool exprNode_isUnhandled (exprNode e) +static constraintList exprNode_traverseTrueEnsuresConstraints (/*@temp@*/ exprNode p_e); +static constraintList exprNode_traverseFalseEnsuresConstraints (/*@temp@*/ exprNode p_e); + +static void checkArgumentList (/*@out@*/ exprNode p_temp, exprNodeList p_arglist, fileloc p_sequencePoint) /*@modifies p_temp @*/; + +static constraintList checkCall (/*@temp@*/ exprNode p_fcn, exprNodeList p_arglist); + +static bool exprNode_isUnhandled (/*@temp@*/ /*@observer@*/ exprNode e) { - llassert( exprNode_isDefined(e) ); + llassert(exprNode_isDefined(e)); switch (e->kind) { case XPR_INITBLOCK: @@ -45,7 +72,6 @@ bool exprNode_isUnhandled (exprNode e) case XPR_VAARG: case XPR_ITERCALL: case XPR_ITER: - case XPR_CAST: case XPR_GOTO: case XPR_CONTINUE: case XPR_BREAK: @@ -54,115 +80,158 @@ bool exprNode_isUnhandled (exprNode e) case XPR_TOK: case XPR_FTDEFAULT: case XPR_DEFAULT: - case XPR_SWITCH: case XPR_FTCASE: case XPR_CASE: - case XPR_INIT: case XPR_NODE: - DPRINTF((message ("Warning current constraint generation does not handle expression %s", exprNode_unparse(e)) ) ); - return FALSE; + DPRINTF((message ("Warning current constraint generation does not handle expression %s", exprNode_unparse(e)))); + return TRUE; /*@notreached@*/ break; default: - return TRUE; + return FALSE; } /*not reached*/ return FALSE; } -bool exprNode_handleError( exprNode e) +/*@nullwhentrue@*/ bool exprNode_handleError (exprNode e) { - if (exprNode_isError (e) || !exprNode_isUnhandled(e) ) + if (exprNode_isError (e) || exprNode_isUnhandled (e)) { - static /*@only@*/ cstring error = cstring_undefined; - - if (!cstring_isDefined (error)) - { - error = cstring_makeLiteral (""); - } - - /*@-unqualifiedtrans*/ return TRUE; /*@=unqualifiedtrans*/ + return TRUE; } + return FALSE; } -void /*@alt bool@*/ exprNode_generateConstraints (/*@temp@*/ exprNode e) +/* evans 2002-03-2 - parameter was dependent */ +bool /*@alt void@*/ exprNode_generateConstraints (/*@temp@*/ exprNode e) { - DPRINTF((message ("exprNode_gnerateConstraints Analysising %s %s at", exprNode_unparse( e), - fileloc_unparse(exprNode_getfileloc(e) ) ) ) ); + if (exprNode_isError (e)) + return FALSE; + + if (exprNode_isUnhandled (e)) + { + DPRINTF((message("Warning ignoring %s", exprNode_unparse (e)))); + return FALSE; + } + + DPRINTF ((message ("exprNode_generateConstraints Analyzing %s at %s", exprNode_unparse(e), + fileloc_unparse(exprNode_loc (e))))); - if (exprNode_isMultiStatement ( e) ) + if (exprNode_isMultiStatement (e)) { exprNode_multiStatement(e); } else { - llassert(FALSE); + /* fileloc loc; */ + + /* loc = exprNode_getNextSequencePoint(e); */ + /* exprNode_exprTraverse(e, FALSE, FALSE, loc); */ + + /* fileloc_free(loc); */ + + exprNode_stmt(e); + return FALSE; + } - printf ("%s", (message ("%s", constraintList_printDetailed (e->requiresConstraints) ) ) ); - printf ("%s", (message ("%s", constraintList_printDetailed (e->ensuresConstraints) ) ) ); + + { + constraintList c; + + c = constraintList_makeFixedArrayConstraints (e->uses); + e->requiresConstraints = constraintList_reflectChangesFreePre (e->requiresConstraints, c); + constraintList_free(c); + } + + DPRINTF ((message ("e->requiresConstraints %s", + constraintList_unparseDetailed (e->requiresConstraints)))); return FALSE; } - -/* handles multiple statements */ - -bool exprNode_isMultiStatement(exprNode e) +static void exprNode_stmt (/*@temp@*/ exprNode e) { -if (exprNode_handleError (e) != NULL) - return FALSE; - - switch (e->kind) + exprNode snode; + fileloc loc; + + DPRINTF (("Generating constraint for: %s", exprNode_unparse (e))); + + if (exprNode_isError(e)) { - case XPR_FOR: - case XPR_FORPRED: - case XPR_IF: - case XPR_IFELSE: - case XPR_WHILE: - case XPR_WHILEPRED: - case XPR_DOWHILE: - case XPR_BLOCK: - case XPR_STMT: - case XPR_STMTLIST: - return TRUE; - default: - return FALSE; + return; } -} + /*e->requiresConstraints = constraintList_makeNew(); + e->ensuresConstraints = constraintList_makeNew(); */ + + /*!! s = exprNode_unparse (e); */ + + if (e->kind == XPR_INIT) + { + constraintList tempList; + DPRINTF (("Init: %s ", exprNode_unparse (e))); + loc = exprNode_getNextSequencePoint (e); /* reduces to an expression */ + DPRINTF (("Location: %s", fileloc_unparse (loc))); + DPRINTF (("Ensures before: %s", constraintList_unparse (e->ensuresConstraints))); + exprNode_exprTraverse (e, FALSE, FALSE, loc); + DPRINTF (("Ensures after: %s", constraintList_unparse (e->ensuresConstraints))); + DPRINTF (("After traversing...")); + fileloc_free(loc); + + tempList = e->requiresConstraints; + DPRINTF (("Requires before: %s", constraintList_unparse (e->requiresConstraints))); + e->requiresConstraints = exprNode_traverseRequiresConstraints (e); + DPRINTF (("Requires after: %s", constraintList_unparse (e->requiresConstraints))); + constraintList_free(tempList); -bool exprNode_stmt (exprNode e) -{ - exprNode snode; - fileloc loc; - bool notError; + tempList = e->ensuresConstraints; + DPRINTF (("Ensures before: %s", constraintList_unparse (e->ensuresConstraints))); + e->ensuresConstraints = exprNode_traverseEnsuresConstraints(e); + DPRINTF (("Ensures before: %s", constraintList_unparse (e->ensuresConstraints))); + constraintList_free(tempList); + return; + } - if (exprNode_isError(e) ) + /*drl 2/13/002 patched bug so return statement will be checked*/ + /*return is a stmt not not expression ...*/ + if (e->kind == XPR_RETURN) { - return FALSE; + constraintList tempList; + + loc = exprNode_getNextSequencePoint(e); /* reduces to an expression */ + + exprNode_exprTraverse (exprData_getSingle (e->edata), FALSE, TRUE, loc); + fileloc_free(loc); + + tempList = e->requiresConstraints; + e->requiresConstraints = exprNode_traverseRequiresConstraints(e); + constraintList_free(tempList); } - e->requiresConstraints = constraintList_new(); - e->ensuresConstraints = constraintList_new(); - - DPRINTF(( "STMT:") ); - DPRINTF ( ( cstring_toCharsSafe ( exprNode_unparse(e)) ) - ); if (e->kind != XPR_STMT) { - - DPRINTF (("Not Stmt") ); - DPRINTF ( (message ("%s ", exprNode_unparse (e)) ) ); - if (exprNode_isMultiStatement (e) ) + DPRINTF (("Not Stmt")); + DPRINTF ((message ("%s ", exprNode_unparse (e)))); + + if (exprNode_isMultiStatement (e)) { - return exprNode_multiStatement (e ); + exprNode_multiStatement (e); /* evans 2001-08-21: spurious return removed */ } - llassert(FALSE); + else + { + loc = exprNode_getNextSequencePoint(e); /* reduces to an expression */ + + exprNode_exprTraverse (e, FALSE, TRUE, loc); + fileloc_free(loc); + + } + return; } - DPRINTF (("Stmt") ); - DPRINTF ( (message ("%s ", exprNode_unparse (e)) ) ); + DPRINTF (("Stmt")); + DPRINTF ((message ("%s ", exprNode_unparse (e)))); snode = exprData_getUopNode (e->edata); @@ -172,426 +241,1751 @@ bool exprNode_stmt (exprNode e) if (exprNode_isMultiStatement (snode)) { - llassert(FALSE); - return exprNode_multiStatement (snode); + exprNode_multiStatement (snode); + (void) exprNode_copyConstraints (e, snode); + return; } loc = exprNode_getNextSequencePoint(e); /* reduces to an expression */ - notError = exprNode_exprTraverse (snode, FALSE, FALSE, loc); - e->requiresConstraints = exprNode_traversRequiresConstraints(snode); - // printf ("%s\n", constraintList_print(e->requiresConstraints) ); - e->ensuresConstraints = exprNode_traversEnsuresConstraints(snode); - // printf ("Ensures that:\n %s\n", constraintList_print(e->ensuresConstraints) ); - llassert(notError); - return notError; + exprNode_exprTraverse (snode, FALSE, FALSE, loc); + + fileloc_free(loc); + + constraintList_free (e->requiresConstraints); + e->requiresConstraints = exprNode_traverseRequiresConstraints(snode); + + constraintList_free (e->ensuresConstraints); + e->ensuresConstraints = exprNode_traverseEnsuresConstraints(snode); -} + DPRINTF ((message ("smtlist constraints are: pre: %s \n and \t post %s\n", + constraintList_unparse(e->requiresConstraints), + constraintList_unparse(e->ensuresConstraints)))); + return; +} -bool exprNode_stmtList (exprNode e) +static void exprNode_stmtList (/*@dependent@*/ exprNode e) { exprNode stmt1, stmt2; - if (exprNode_isError (e) ) + if (exprNode_isError (e)) { - return FALSE; + return; } - e->requiresConstraints = constraintList_new(); - e->ensuresConstraints = constraintList_new(); - - /*Handle case of stmtList with only one statement: - The parse tree stores this as stmt instead of stmtList*/ + /* + Handle case of stmtList with only one statement: + The parse tree stores this as stmt instead of stmtList + */ + if (e->kind != XPR_STMTLIST) { - return exprNode_stmt(e); + exprNode_stmt(e); + return; } llassert (e->kind == XPR_STMTLIST); - DPRINTF(( "STMTLIST:") ); - DPRINTF ((cstring_toCharsSafe (exprNode_unparse(e)) ) ); + DPRINTF(("exprNode_stmtList STMTLIST:")); + DPRINTF ((cstring_toCharsSafe (exprNode_unparse(e)))); stmt1 = exprData_getPairA (e->edata); stmt2 = exprData_getPairB (e->edata); - + + DPRINTF(("exprNode_stmtlist ")); + DPRINTF ((message("XW%s | %s", exprNode_unparse(stmt1), exprNode_unparse(stmt2)))); + exprNode_stmt (stmt1); - DPRINTF(("\nstmt after stmtList call " )); + DPRINTF(("\nstmt after stmtList call ")); exprNode_stmt (stmt2); + exprNode_mergeResolve (e, stmt1, stmt2); + + DPRINTF ((message ("smtlist constraints are: pre: %s \n and \t post %s\n", + constraintList_unparse(e->requiresConstraints), + constraintList_unparse(e->ensuresConstraints)))); + return; +} + +static exprNode doIf (/*@returned@*/ exprNode e, /*@dependent@*/ exprNode test, /*@dependent@*/ exprNode body) +{ + constraintList temp; + + DPRINTF ((message ("doIf: %s ", exprNode_unparse(e)))); + + llassert (exprNode_isDefined(test)); + llassert (exprNode_isDefined (e)); + llassert (exprNode_isDefined (body)); + + DPRINTF((message ("ensures constraints for %s are %s", exprNode_unparse(e), constraintList_unparseDetailed(e->ensuresConstraints)))); + + DPRINTF((message ("Requires constraints for %s are %s", exprNode_unparse(e), constraintList_unparseDetailed(e->ensuresConstraints)))); + + DPRINTF((message ("trueEnsures constraints for %s are %s", exprNode_unparse(e), constraintList_unparseDetailed(e->trueEnsuresConstraints)))); - mergeResolve (e, stmt1, stmt2 ); - DPRINTF ( (message ("smtlist constraints are: pre: %s \n and \t post %s\n", - constraintList_print(e->requiresConstraints), - constraintList_print(e->ensuresConstraints) ) ) ); - return TRUE; + DPRINTF((message ("falseEnsures constraints for %s are %s", exprNode_unparse(e), constraintList_unparseDetailed(e->falseEnsuresConstraints)))); + + + + DPRINTF((message ("ensures constraints for %s are %s", exprNode_unparse(test), constraintList_unparseDetailed(test->ensuresConstraints)))); + + DPRINTF((message ("Requires constraints for %s are %s", exprNode_unparse(test), constraintList_unparseDetailed(test->ensuresConstraints)))); + + DPRINTF((message ("trueEnsures constraints for %s are %s", exprNode_unparse(test), constraintList_unparseDetailed(test->trueEnsuresConstraints)))); + + DPRINTF((message ("falseEnsures constraints for %s are %s", exprNode_unparse(test), constraintList_unparseDetailed(test->falseEnsuresConstraints)))); + + + + temp = test->trueEnsuresConstraints; + test->trueEnsuresConstraints = exprNode_traverseTrueEnsuresConstraints(test); + constraintList_free(temp); + + temp = test->ensuresConstraints; + test->ensuresConstraints = exprNode_traverseEnsuresConstraints (test); + constraintList_free(temp); + + temp = test->requiresConstraints; + test->requiresConstraints = exprNode_traverseRequiresConstraints (test); + constraintList_free(temp); + + + test->trueEnsuresConstraints = constraintList_substituteFreeTarget(test->trueEnsuresConstraints, test->ensuresConstraints); + + DPRINTF ((message ("doIf: test ensures %s ", constraintList_unparse(test->ensuresConstraints)))); + + DPRINTF ((message ("doIf: test true ensures %s ", constraintList_unparse(test->trueEnsuresConstraints)))); + + constraintList_free(e->requiresConstraints); + + + e->requiresConstraints = constraintList_reflectChanges(body->requiresConstraints, test->trueEnsuresConstraints); + + e->requiresConstraints = constraintList_reflectChangesFreePre (e->requiresConstraints, + test->ensuresConstraints); + temp = e->requiresConstraints; + e->requiresConstraints = constraintList_mergeRequires (e->requiresConstraints, test->requiresConstraints); + constraintList_free(temp); + + + /* drl possible problem : warning bad */ + constraintList_free(e->ensuresConstraints); + e->ensuresConstraints = constraintList_copy (test->ensuresConstraints); + + if (exprNode_mayEscape (body)) + { + DPRINTF ((message("doIf: the if statement body %s returns or exits", exprNode_unparse(body)))); + e->ensuresConstraints = constraintList_mergeEnsuresFreeFirst (e->ensuresConstraints, + test->falseEnsuresConstraints); + } + + DPRINTF ((message ("doIf: if requiers %s ", constraintList_unparse(e->requiresConstraints)))); + + return e; } +/*drl added 3/4/2001 + Also used for condition i.e. ?: operation + + Precondition + This function assumes that p, trueBranch, falseBranch have have all been traversed + for constraints i.e. we assume that exprNode_traverseEnsuresConstraints, + exprNode_traverseRequiresConstraints, exprNode_traverseTrueEnsuresConstraints, + exprNode_traverseFalseEnsuresConstraints have all been run +*/ -bool exprNode_multiStatement (exprNode e) +static exprNode doIfElse (/*@returned@*/ exprNode e, /*@dependent@*/ exprNode p, /*@dependent@*/ exprNode trueBranch, /*@dependent@*/ exprNode falseBranch) { + constraintList c1, cons, t, t2, f, f2; - bool ret; - exprData data; + llassert (exprNode_isDefined (e)); + llassert (exprNode_isDefined (p)); + llassert (exprNode_isDefined (trueBranch)); + llassert (exprNode_isDefined (falseBranch)); + DPRINTF ((message ("doIfElse: %s ", exprNode_unparse(e)))); + + /* do requires clauses */ + c1 = constraintList_copy (p->ensuresConstraints); + + t = constraintList_reflectChanges(trueBranch->requiresConstraints, p->trueEnsuresConstraints); + t = constraintList_reflectChangesFreePre (t, p->ensuresConstraints); + + cons = constraintList_reflectChanges(falseBranch->requiresConstraints, p->falseEnsuresConstraints); + cons = constraintList_reflectChangesFreePre (cons, c1); + + constraintList_free (e->requiresConstraints); + e->requiresConstraints = constraintList_mergeRequiresFreeFirst (t, cons); + e->requiresConstraints = constraintList_mergeRequiresFreeFirst (e->requiresConstraints, p->requiresConstraints); + + /* do ensures clauses + find the the ensures lists for each subbranch + */ + t = constraintList_mergeEnsures (p->trueEnsuresConstraints, trueBranch->ensuresConstraints); + t2 = t; + t = constraintList_mergeEnsures (p->ensuresConstraints, t); + constraintList_free(t2); - DPRINTF((message ("exprNode_multistatement Analysising %s %s at", exprNode_unparse( e), - fileloc_unparse(exprNode_getfileloc(e) ) ) ) ); + f = constraintList_mergeEnsures (p->falseEnsuresConstraints, falseBranch->ensuresConstraints); + f2 = f; + f = constraintList_mergeEnsures (p->ensuresConstraints, f); + constraintList_free(f2); - if (exprNode_handleError (e)) + /* find ensures for whole if/else statement */ + + constraintList_free(e->ensuresConstraints); + + e->ensuresConstraints = constraintList_logicalOr (t, f); + + constraintList_free(t); + constraintList_free(f); + constraintList_free(cons); + constraintList_free(c1); + + DPRINTF ((message ("doIfElse: if requires %q ", constraintList_unparse(e->requiresConstraints)))); + DPRINTF ((message ("doIfElse: if ensures %q ", constraintList_unparse(e->ensuresConstraints)))); + + return e; +} + +static exprNode doWhile (/*@returned@*/ exprNode e, /*@dependent@*/ exprNode test, /*@dependent@*/ exprNode body) +{ + DPRINTF ((message ("doWhile: %s ", exprNode_unparse(e)))); + return doIf (e, test, body); +} + +/*@only@*/ constraintList constraintList_makeFixedArrayConstraints (/*@observer@*/ sRefSet s) +{ + constraintList ret; + constraint con; + ret = constraintList_makeNew(); + + sRefSet_elements (s, el) { - return FALSE; + if (sRef_isFixedArray(el)) + { + size_t size; + DPRINTF((message("%s is a fixed array", + sRef_unparse(el)))); + size = sRef_getArraySize(el); + DPRINTF((message("%s is a fixed array with size %d", + sRef_unparse(el), (int)size))); + con = constraint_makeSRefSetBufferSize (el, size_toLong (size - 1)); + ret = constraintList_add(ret, con); + } + else + { + DPRINTF((message("%s is not a fixed array", + sRef_unparse(el)))); + + + if (sRef_isExternallyVisible (el)) + { + /* + DPRINTF((message("%s is externally visible", + sRef_unparse(el)))); + con = constraint_makeSRefWriteSafeInt(el, 0); + ret = constraintList_add(ret, con); + + con = constraint_makeSRefReadSafeInt(el, 0); + + ret = constraintList_add(ret, con); + */ + } + } } + end_sRefSet_elements ; + + DPRINTF((message("constraintList_makeFixedArrayConstraints returning %s", + constraintList_unparse(ret)))); + return ret; +} - data = e->edata; +# if 0 +exprNode makeDataTypeConstraints (/*@returned@*/ exprNode e) +{ + constraintList c; + DPRINTF(("makeDataTypeConstraints")); - ret = TRUE; + c = constraintList_makeFixedArrayConstraints (e->uses); + + e->ensuresConstraints = constraintList_addListFree (e->ensuresConstraints, c); + + return e; +} +# endif - switch (e->kind) +static void doFor (/*@dependent@*/ exprNode e, /*@dependent@*/ exprNode forPred, /*@dependent@*/ exprNode forBody) +{ + exprNode init, test, inc; + /* merge the constraints: modle as if statement */ + + /* init + if (test) + for body + inc */ + + llassert (exprNode_isDefined (e)); + llassert (exprNode_isDefined (forPred)); + llassert (exprNode_isDefined (forBody)); + + init = exprData_getTripleInit (forPred->edata); + test = exprData_getTripleTest (forPred->edata); + inc = exprData_getTripleInc (forPred->edata); + + if (((exprNode_isError (test) /*|| (exprNode_isError(init))*/) || (exprNode_isError (inc)))) { - - case XPR_FOR: - // ret = message ("%s %s", - exprNode_generateConstraints (exprData_getPairA (data)); - exprNode_generateConstraints (exprData_getPairB (data)); - break; + DPRINTF ((message ("strange for statement:%s, ignoring it", exprNode_unparse(e)))); + return; + } + + exprNode_forLoopHeuristics(e, forPred, forBody); + + constraintList_free(e->requiresConstraints); + e->requiresConstraints = constraintList_reflectChanges(forBody->requiresConstraints, test->ensuresConstraints); + e->requiresConstraints = constraintList_reflectChangesFreePre (e->requiresConstraints, test->trueEnsuresConstraints); + e->requiresConstraints = constraintList_reflectChangesFreePre (e->requiresConstraints, forPred->ensuresConstraints); + + if (!forBody->canBreak) + { + e->ensuresConstraints = constraintList_addListFree(e->ensuresConstraints, constraintList_copy(forPred->ensuresConstraints)); + e->ensuresConstraints = constraintList_addListFree(e->ensuresConstraints,constraintList_copy(test->falseEnsuresConstraints)); + } + else + { + DPRINTF(("Can break")); + } +} - case XPR_FORPRED: - // ret = message ("for (%s; %s; %s)", - exprNode_generateConstraints (exprData_getTripleInit (data)); - exprNode_generateConstraints (exprData_getTripleTest (data)); - exprNode_generateConstraints (exprData_getTripleInc (data)); - break; - case XPR_IF: - DPRINTF(( "IF:") ); - DPRINTF ((exprNode_unparse(e) ) ); - // ret = message ("if (%s) %s", - exprNode_generateConstraints (exprData_getPairA (data)); - exprNode_generateConstraints (exprData_getPairB (data)); - // e->constraints = constraintList_exprNodemerge (exprData_getPairA (data),exprData_getPairB(data)); - break; +static /*@dependent@*/ exprNode exprNode_makeDependent(/*@returned@*/ exprNode e) +{ + /* !!! DRL - this is ridiculous! Read the manual on memory annotations please! */ + return e; +} + +static void +exprNode_doGenerateConstraintSwitch + (/*@dependent@*/ exprNode switchExpr, + /*@dependent@*/ exprNode body, + /*@special@*/ constraintList *currentRequires, + /*@special@*/ constraintList *currentEnsures, + /*@special@*/ constraintList *savedRequires, + /*@special@*/ constraintList *savedEnsures) + /*@post:only *currentRequires, *currentEnsures, *savedRequires, *savedEnsures @*/ + /*@sets *currentRequires, *currentEnsures, *savedRequires, *savedEnsures @*/ +{ + exprNode stmt, stmtList; + + DPRINTF((message("exprNode_doGenerateConstraintSwitch: (switch %s) %s", + exprNode_unparse(switchExpr), exprNode_unparse(body) + ))); + + if (exprNode_isError(body)) + { + *currentRequires = constraintList_makeNew (); + *currentEnsures = constraintList_makeNew (); + + *savedRequires = constraintList_makeNew (); + *savedEnsures = constraintList_makeNew (); + /*@-onlytrans@*/ + return; + /*@=onlytrans@*/ + } + + if (body->kind != XPR_STMTLIST) + { + DPRINTF((message("exprNode_doGenerateConstraintSwitch: non stmtlist: %s", + exprNode_unparse(body)))); + stmt = body; + stmtList = exprNode_undefined; + stmt = exprNode_makeDependent(stmt); + stmtList = exprNode_makeDependent(stmtList); + } + else + { + stmt = exprData_getPairB(body->edata); + stmtList = exprData_getPairA(body->edata); + stmt = exprNode_makeDependent(stmt); + stmtList = exprNode_makeDependent(stmtList); + } + + DPRINTF((message("exprNode_doGenerateConstraintSwitch: stmtlist: %s stmt: %s", + exprNode_unparse(stmtList), exprNode_unparse(stmt)) + )); + + + exprNode_doGenerateConstraintSwitch (switchExpr, stmtList, currentRequires, currentEnsures, + savedRequires, savedEnsures); + + if (exprNode_isError(stmt)) + /*@-onlytrans@*/ + return; + /*@=onlytrans@*/ + + exprNode_stmt(stmt); + + switchExpr = exprNode_makeDependent (switchExpr); + + if (! exprNode_isCaseMarker(stmt)) + { + + constraintList temp; + + DPRINTF ((message("Got normal statement %s (requires %s ensures %s)", exprNode_unparse(stmt), + constraintList_unparse(stmt->requiresConstraints), constraintList_unparse(stmt->ensuresConstraints)))); + + temp = constraintList_reflectChanges (stmt->requiresConstraints, + *currentEnsures); + + *currentRequires = constraintList_mergeRequiresFreeFirst( + *currentRequires, + temp); + + constraintList_free(temp); + + *currentEnsures = constraintList_mergeEnsuresFreeFirst + (*currentEnsures, + stmt->ensuresConstraints); + DPRINTF((message("returning from exprNode_doGenerateConstraintSwitch: (switch %s) %s currentRequires:" + "%s currentEnsures:%s", + exprNode_unparse(switchExpr), exprNode_unparse(body), + constraintList_unparse(*currentRequires), constraintList_unparse(*currentEnsures) + ))); + /*@-onlytrans@*/ + return; + /*@=onlytrans@*/ + + } + + if (exprNode_isCaseMarker(stmt) && exprNode_mustEscape(stmtList)) + { + /* + ** merge current and saved constraint with Logical Or... + ** make a constraint for ensures + */ + + constraintList temp; + constraint con; + + DPRINTF ((message("Got case marker"))); + + if (constraintList_isUndefined(*savedEnsures) && + constraintList_isUndefined(*savedRequires)) + { + llassert(constraintList_isUndefined(*savedEnsures)); + llassert(constraintList_isUndefined(*savedRequires)); + *savedEnsures = constraintList_copy(*currentEnsures); + *savedRequires = constraintList_copy(*currentRequires); + } + else + { + DPRINTF ((message("Doing logical or"))); + temp = constraintList_logicalOr (*savedEnsures, *currentEnsures); + constraintList_free (*savedEnsures); + *savedEnsures = temp; + + *savedRequires = constraintList_mergeRequiresFreeFirst (*savedRequires, *currentRequires); + } - case XPR_IFELSE: - // ret = message ("if (%s) %s else %s", - exprNode_generateConstraints (exprData_getTriplePred (data)); - exprNode_generateConstraints (exprData_getTripleTrue (data)); - exprNode_generateConstraints (exprData_getTripleFalse (data)); - break; - case XPR_WHILE: - // ret = message ("while (%s) %s", - exprNode_generateConstraints (exprData_getPairA (data)); - exprNode_generateConstraints (exprData_getPairB (data)); - // e->constraints = constraintList_exprNodemerge (exprData_getPairA (data), exprData_getPairB (data) ); - break; + con = constraint_makeEnsureEqual (switchExpr, exprData_getSingle (stmt->edata), exprNode_loc (stmt)); - case XPR_WHILEPRED: - // ret = - // cstring_copy ( - exprNode_generateConstraints (exprData_getSingle (data)); - break; + constraintList_free (*currentEnsures); + *currentEnsures = constraintList_makeNew(); + *currentEnsures = constraintList_add(*currentEnsures, con); - case XPR_DOWHILE: - // ret = message ("do { %s } while (%s)", - exprNode_generateConstraints (exprData_getPairB (data)); - exprNode_generateConstraints (exprData_getPairA (data)); - break; + constraintList_free(*currentRequires); + *currentRequires = constraintList_makeNew(); + DPRINTF (("exprNode_doGenerateConstraintSwitch: (switch %s) %s savedRequires:" + "%s savedEnsures:%s", + exprNode_unparse(switchExpr), exprNode_unparse(body), + constraintList_unparse(*savedRequires), constraintList_unparse(*savedEnsures) + )); + } + else if (exprNode_isCaseMarker(stmt)) /* prior case has no break. */ + { + /* + We don't do anything to the sved constraints because the case hasn't ended + The new ensures constraints for the case will be: + the constraint for the case statement (CASE_LABEL == SWITCH_EXPR) logicalOr currentEnsures + */ - case XPR_BLOCK: - // ret = message ("{ %s }", - exprNode_generateConstraints (exprData_getSingle (data)); - e->requiresConstraints = constraintList_copy ( (exprData_getSingle (data))->requiresConstraints ); - e->ensuresConstraints = constraintList_copy ( (exprData_getSingle (data))->ensuresConstraints ); - // e->constraints = (exprData_getSingle (data))->constraints; - break; + constraintList temp; + constraint con; + constraintList ensuresTemp; - case XPR_STMT: - case XPR_STMTLIST: - return exprNode_stmtList (e); - /*@notreached@*/ - break; - default: - ret=FALSE; + con = constraint_makeEnsureEqual (switchExpr, exprData_getSingle (stmt->edata), exprNode_loc (stmt)); + + ensuresTemp = constraintList_makeNew (); + ensuresTemp = constraintList_add (ensuresTemp, con); + + if (exprNode_isError (stmtList)) + { + constraintList_free (*currentEnsures); + *currentEnsures = constraintList_copy (ensuresTemp); + constraintList_free (ensuresTemp); + } + else + { + temp = constraintList_logicalOr (*currentEnsures, ensuresTemp); + constraintList_free (*currentEnsures); + constraintList_free (ensuresTemp); + *currentEnsures = temp; + } + + constraintList_free (*currentRequires); + *currentRequires = constraintList_makeNew(); } - return ret; + else + { + /* + we handle the case of ! exprNode_isCaseMarker above + the else if clause should always be true. + */ + BADEXIT; + } + + DPRINTF (("returning from exprNode_doGenerateConstraintSwitch: (switch %s) %s currentRequires:" + "%s currentEnsures:%s", + exprNode_unparse(switchExpr), exprNode_unparse(body), + constraintList_unparse(*currentRequires), constraintList_unparse(*currentEnsures) + )); + + /*@-onlytrans@*/ + return; + /*@=onlytrans@*/ } -bool exprNode_exprTraverse (exprNode e, bool definatelv, bool definaterv, fileloc sequencePoint) +static void exprNode_generateConstraintSwitch (/*@notnull@*/ exprNode switchStmt) { - exprNode t1, t2; + constraintList constraintsRequires; + constraintList constraintsEnsures; + constraintList lastRequires; + constraintList lastEnsures; + + exprNode body; + exprNode switchExpr; + + switchExpr = exprData_getPairA (switchStmt->edata); + body = exprData_getPairB (switchStmt->edata); + + if (!exprNode_isDefined (body)) + { + return; + } + + DPRINTF((message(""))); + + if (body->kind == XPR_BLOCK) + body = exprData_getSingle(body->edata); + + + constraintsRequires = constraintList_undefined; + constraintsEnsures = constraintList_undefined; + + lastRequires = constraintList_makeNew(); + lastEnsures = constraintList_makeNew(); + + + /*@-mustfree@*/ + /* evans 2002-01-01: spurious warnings for these becuase of stack allocated storage */ + exprNode_doGenerateConstraintSwitch (switchExpr, body, &lastRequires, + &lastEnsures, &constraintsRequires, &constraintsEnsures); + /*@=mustfree@*/ + + /* + merge current and saved constraint with Logical Or... + make a constraint for ensures + */ + + constraintList_free(switchStmt->requiresConstraints); + constraintList_free(switchStmt->ensuresConstraints); + + if (constraintList_isDefined(constraintsEnsures) && constraintList_isDefined(constraintsRequires)) + { + switchStmt->ensuresConstraints = constraintList_logicalOr(constraintsEnsures, lastEnsures); + switchStmt->requiresConstraints = constraintList_mergeRequires(constraintsRequires, lastRequires); + constraintList_free (constraintsRequires); + constraintList_free (constraintsEnsures); + } + else + { + switchStmt->ensuresConstraints = constraintList_copy(lastEnsures); + switchStmt->requiresConstraints = constraintList_copy(lastRequires); + } + + constraintList_free (lastRequires); + constraintList_free (lastEnsures); + + DPRINTF(((message(" exprNode_generateConstraintSwitch returning requires: %s and ensures %s", + constraintList_unparse(switchStmt->requiresConstraints), + constraintList_unparse(switchStmt->ensuresConstraints) + ) + ))); +} + +static exprNode doSwitch (/*@returned@*/ /*@notnull@*/ exprNode e) +{ + exprNode body; + exprData data; + + data = e->edata; + DPRINTF ((message ("doSwitch for: switch (%s) %s", + exprNode_unparse (exprData_getPairA (data)), + exprNode_unparse (exprData_getPairB (data))))); + + body = exprData_getPairB (data); + exprNode_generateConstraintSwitch (e); + return e; +} + +void exprNode_multiStatement (/*@dependent@*/ exprNode e) +{ + + bool ret; + exprData data; + exprNode e1, e2; + exprNode p, trueBranch, falseBranch; + exprNode forPred, forBody; + exprNode test; + + constraintList temp; + + DPRINTF((message ("exprNode_multistatement Analysising %s %s at", exprNode_unparse(e), + fileloc_unparse(exprNode_getfileloc(e))))); + + if (exprNode_handleError (e)) + { + return; + } + + data = e->edata; + + ret = TRUE; + + switch (e->kind) + { + + case XPR_FOR: + forPred = exprData_getPairA (data); + forBody = exprData_getPairB (data); + + /* First generate the constraints */ + exprNode_generateConstraints (forPred); + exprNode_generateConstraints (forBody); + + + doFor (e, forPred, forBody); + + break; + + case XPR_FORPRED: + exprNode_generateConstraints (exprData_getTripleInit (data)); + test = exprData_getTripleTest (data); + exprNode_exprTraverse (test,FALSE, FALSE, exprNode_loc(e)); + exprNode_generateConstraints (exprData_getTripleInc (data)); + + if (!exprNode_isError(test)) + { + constraintList temp2; + temp2 = test->trueEnsuresConstraints; + test->trueEnsuresConstraints = exprNode_traverseTrueEnsuresConstraints(test); + constraintList_free(temp2); + } + + exprNode_generateConstraints (exprData_getTripleInc (data)); + break; + + case XPR_WHILE: + e1 = exprData_getPairA (data); + e2 = exprData_getPairB (data); + + exprNode_exprTraverse (e1, + FALSE, FALSE, exprNode_loc(e1)); + + exprNode_generateConstraints (e2); + + e = doWhile (e, e1, e2); + + break; + + case XPR_IF: + DPRINTF(("IF:")); + DPRINTF ((exprNode_unparse(e))); + e1 = exprData_getPairA (data); + e2 = exprData_getPairB (data); + + exprNode_exprTraverse (e1, FALSE, FALSE, exprNode_loc(e1)); + + exprNode_generateConstraints (e2); + e = doIf (e, e1, e2); + break; + + case XPR_IFELSE: + DPRINTF(("Starting IFELSE")); + p = exprData_getTriplePred (data); + + trueBranch = exprData_getTripleTrue (data); + falseBranch = exprData_getTripleFalse (data); + + exprNode_exprTraverse (p, + FALSE, FALSE, exprNode_loc(p)); + exprNode_generateConstraints (trueBranch); + exprNode_generateConstraints (falseBranch); + + llassert (exprNode_isDefined (p)); + temp = p->ensuresConstraints; + p->ensuresConstraints = exprNode_traverseEnsuresConstraints (p); + constraintList_free(temp); + + temp = p->requiresConstraints; + p->requiresConstraints = exprNode_traverseRequiresConstraints (p); + constraintList_free(temp); + + temp = p->trueEnsuresConstraints; + p->trueEnsuresConstraints = exprNode_traverseTrueEnsuresConstraints(p); + constraintList_free(temp); + + + + DPRINTF((message("p->trueEnsuresConstraints before substitue %s", constraintList_unparse(p->trueEnsuresConstraints) ) + )); + + /*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*/ + + p->trueEnsuresConstraints = constraintList_substituteFreeTarget (p->trueEnsuresConstraints, + p->ensuresConstraints); + + DPRINTF(( message ("p->trueEnsuresConstraints after substitue %s", constraintList_unparse(p->trueEnsuresConstraints) ) + )); + + temp = p->falseEnsuresConstraints; + p->falseEnsuresConstraints = exprNode_traverseFalseEnsuresConstraints(p); + constraintList_free(temp); + + /*See comment on trueEnsures*/ + p->falseEnsuresConstraints = constraintList_substituteFreeTarget (p->falseEnsuresConstraints, + p->ensuresConstraints); + + e = doIfElse (e, p, trueBranch, falseBranch); + DPRINTF(("Done IFELSE")); + break; + + case XPR_DOWHILE: + + e2 = (exprData_getPairB (data)); + e1 = (exprData_getPairA (data)); + + DPRINTF((message ("do { %s } while (%s)", exprNode_unparse(e2), exprNode_unparse(e1)))); + exprNode_generateConstraints (e2); + exprNode_generateConstraints (e1); + e = exprNode_copyConstraints (e, e2); + DPRINTF ((message ("e = %s ", constraintList_unparse(e->requiresConstraints)))); + + break; + + case XPR_BLOCK: + { + exprNode tempExpr; + + tempExpr = exprData_getSingle (data); + + exprNode_generateConstraints (tempExpr); + + if (exprNode_isDefined(tempExpr) ) + { + constraintList_free(e->requiresConstraints); + e->requiresConstraints = constraintList_copy (tempExpr->requiresConstraints); + constraintList_free(e->ensuresConstraints); + e->ensuresConstraints = constraintList_copy (tempExpr->ensuresConstraints); + } + else + { + llassert(FALSE); + } + } + break; + + case XPR_SWITCH: + e = doSwitch (e); + break; + case XPR_STMT: + case XPR_STMTLIST: + exprNode_stmtList (e); + return ; + /*@notreached@*/ + break; + default: + ret=FALSE; + } + return; +} + +static bool lltok_isBoolean_Op (lltok tok) +{ + /*this should really be a switch statement but + I don't want to violate the abstraction + maybe this should go in lltok.c */ + + if (lltok_isEqOp (tok)) + { + return TRUE; + } + if (lltok_isAndOp (tok)) + + { + + return TRUE; + } + if (lltok_isOrOp (tok)) + { + return TRUE; + } + + if (lltok_isGt_Op (tok)) + { + return TRUE; + } + if (lltok_isLt_Op (tok)) + { + return TRUE; + } + + if (lltok_isLe_Op (tok)) + { + return TRUE; + } + + if (lltok_isGe_Op (tok)) + { + return TRUE; + } + + return FALSE; + +} + + +static void exprNode_booleanTraverse (/*@dependent@*/ exprNode e, /*@unused@*/ bool definatelv, /*@unused@*/ bool definaterv, fileloc sequencePoint) +{ + constraint cons; + exprNode t1, t2; + exprData data; + lltok tok; + constraintList tempList, temp; + + if (exprNode_isUndefined(e) ) + { + llassert (exprNode_isDefined(e) ); + return; + } + + data = e->edata; + + tok = exprData_getOpTok (data); + t1 = exprData_getOpA (data); + t2 = exprData_getOpB (data); + + /* drl 3/2/2003 we know this because of the type of expression*/ + llassert( exprNode_isDefined(t1) && exprNode_isDefined(t2) ); + + + tempList = constraintList_undefined; + + /* arithmetic tests */ + + if (lltok_isEqOp (tok)) + { + cons = constraint_makeEnsureEqual (t1, t2, sequencePoint); + e->trueEnsuresConstraints = constraintList_add(e->trueEnsuresConstraints, cons); + } + + + if (lltok_isLt_Op (tok)) + { + cons = constraint_makeEnsureLessThan (t1, t2, sequencePoint); + e->trueEnsuresConstraints = constraintList_add(e->trueEnsuresConstraints, cons); + cons = constraint_makeEnsureGreaterThanEqual (t1, t2, sequencePoint); + e->falseEnsuresConstraints = constraintList_add(e->falseEnsuresConstraints, cons); + } + + if (lltok_isGe_Op (tok)) + { + cons = constraint_makeEnsureGreaterThanEqual (t1, t2, sequencePoint); + e->trueEnsuresConstraints = constraintList_add(e->trueEnsuresConstraints, cons); + + cons = constraint_makeEnsureLessThan (t1, t2, sequencePoint); + e->falseEnsuresConstraints = constraintList_add(e->falseEnsuresConstraints, cons); + } + + if (lltok_isGt_Op (tok)) + { + cons = constraint_makeEnsureGreaterThan (t1, t2, sequencePoint); + e->trueEnsuresConstraints = constraintList_add(e->trueEnsuresConstraints, cons); + cons = constraint_makeEnsureLessThanEqual (t1, t2, sequencePoint); + e->falseEnsuresConstraints = constraintList_add(e->falseEnsuresConstraints, cons); + } + + if (lltok_isLe_Op (tok)) + { + cons = constraint_makeEnsureLessThanEqual (t1, t2, sequencePoint); + e->trueEnsuresConstraints = constraintList_add(e->trueEnsuresConstraints, cons); + + cons = constraint_makeEnsureGreaterThan (t1, t2, sequencePoint); + e->falseEnsuresConstraints = constraintList_add(e->falseEnsuresConstraints, cons); + } + + /* Logical operations */ + + if (lltok_isAndOp (tok)) + { + /* true ensures */ + tempList = constraintList_copy (t1->trueEnsuresConstraints); + tempList = constraintList_addList (tempList, t2->trueEnsuresConstraints); + e->trueEnsuresConstraints = constraintList_addListFree(e->trueEnsuresConstraints, tempList); + + /* false ensures: fens t1 or tens t1 and fens t2 */ + tempList = constraintList_copy (t1->trueEnsuresConstraints); + tempList = constraintList_addList (tempList, t2->falseEnsuresConstraints); + temp = tempList; + tempList = constraintList_logicalOr (tempList, t1->falseEnsuresConstraints); + constraintList_free (temp); + + /* evans - was constraintList_addList - memory leak detected by splint */ + e->falseEnsuresConstraints = constraintList_addListFree (e->falseEnsuresConstraints, tempList); + } + else if (lltok_isOrOp (tok)) + { + /* false ensures */ + tempList = constraintList_copy (t1->falseEnsuresConstraints); + tempList = constraintList_addList (tempList, t2->falseEnsuresConstraints); + e->falseEnsuresConstraints = constraintList_addListFree(e->falseEnsuresConstraints, tempList); + + /* true ensures: tens t1 or fens t1 and tens t2 */ + tempList = constraintList_copy (t1->falseEnsuresConstraints); + tempList = constraintList_addList (tempList, t2->trueEnsuresConstraints); + + temp = tempList; + tempList = constraintList_logicalOr (tempList, t1->trueEnsuresConstraints); + constraintList_free(temp); + + e->trueEnsuresConstraints = constraintList_addListFree(e->trueEnsuresConstraints, tempList); + tempList = constraintList_undefined; + } + else + { + DPRINTF((message("%s is not a boolean operation", lltok_unparse(tok)))); + } +} + +void exprNode_exprTraverse (/*@dependent@*/ exprNode e, + bool definatelv, bool definaterv, + /*@observer@*/ /*@temp@*/ fileloc sequencePoint) +{ + exprNode t1, t2, fcn; + lltok tok; + exprData data; + constraint cons; + constraintList temp; + + if (exprNode_isError(e)) + { + return; + } + + DPRINTF (("exprNode_exprTraverse analyzing %s at %s", + exprNode_unparse (e), + fileloc_unparse (exprNode_loc (e)))); + + if (exprNode_isUnhandled (e)) + { + return; + } + + data = e->edata; + + switch (e->kind) + { + case XPR_WHILEPRED: + t1 = exprData_getSingle (data); + exprNode_exprTraverse (t1, definatelv, definaterv, sequencePoint); + e = exprNode_copyConstraints (e, t1); + break; + + case XPR_FETCH: + + if (definatelv) + { + t1 = (exprData_getPairA (data)); + t2 = (exprData_getPairB (data)); + cons = constraint_makeWriteSafeExprNode (t1, t2); + } + else + { + t1 = (exprData_getPairA (data)); + t2 = (exprData_getPairB (data)); + cons = constraint_makeReadSafeExprNode (t1, t2); + } + + e->requiresConstraints = constraintList_add(e->requiresConstraints, cons); + cons = constraint_makeEnsureMaxReadAtLeast (t1, t2, sequencePoint); + e->ensuresConstraints = constraintList_add(e->ensuresConstraints, cons); + + cons = constraint_makeEnsureLteMaxRead (t2, t1); + e->trueEnsuresConstraints = constraintList_add(e->trueEnsuresConstraints, cons); + + exprNode_exprTraverse (exprData_getPairA (data), FALSE, TRUE, sequencePoint); + exprNode_exprTraverse (exprData_getPairB (data), FALSE, TRUE, sequencePoint); + + break; + + case XPR_PARENS: + exprNode_exprTraverse (exprData_getUopNode (e->edata), definatelv, definaterv, sequencePoint); + break; + case XPR_INIT: + { + t2 = exprData_getInitNode (data); + + DPRINTF (("initialization ==> %s",exprNode_unparse (t2))); + + exprNode_exprTraverse (t2, definatelv, TRUE, sequencePoint); + + /* This test is nessecary because some expressions generate a null expression node. + function pointer do that -- drl */ + + if (!exprNode_isError (e) && !exprNode_isError (t2)) + { + cons = constraint_makeEnsureEqual (e, t2, sequencePoint); + e->ensuresConstraints = constraintList_add(e->ensuresConstraints, cons); + } + } + + break; + case XPR_ASSIGN: + t1 = exprData_getOpA (data); + t2 = exprData_getOpB (data); + DPRINTF (("Assignment constraints t1: %s", constraintList_unparse (t1->ensuresConstraints))); + DPRINTF (("Assignment constraints t2: %s", constraintList_unparse (t2->ensuresConstraints))); + exprNode_exprTraverse (t1, TRUE, definaterv, sequencePoint); + DPRINTF (("Assignment constraints t1: %s", constraintList_unparse (t1->ensuresConstraints))); + DPRINTF (("Assignment constraints t2: %s", constraintList_unparse (t2->ensuresConstraints))); + exprNode_exprTraverse (t2, definatelv, TRUE, sequencePoint); + DPRINTF (("Assignment constraints t1: %s", constraintList_unparse (t1->ensuresConstraints))); + DPRINTF (("Assignment constraints t2: %s", constraintList_unparse (t2->ensuresConstraints))); + + /* this test is nessecary because some expressions generate a null expression node. + function pointer do that -- drl */ + + if ((!exprNode_isError (t1)) && (!exprNode_isError(t2))) + { + cons = constraint_makeEnsureEqual (t1, t2, sequencePoint); + DPRINTF (("Ensure equal constraint: %s", constraint_unparse (cons))); + e->ensuresConstraints = constraintList_add (e->ensuresConstraints, cons); + DPRINTF (("Assignment constraints: %s", constraintList_unparse (e->ensuresConstraints))); + } + break; + case XPR_OP: + t1 = exprData_getOpA (data); + t2 = exprData_getOpB (data); + tok = exprData_getOpTok (data); + + if (lltok_getTok (tok) == ADD_ASSIGN) + { + exprNode_exprTraverse (t1, TRUE, definaterv, sequencePoint); + exprNode_exprTraverse (t2, definatelv, TRUE, sequencePoint); + + cons = constraint_makeAddAssign (t1, t2, sequencePoint); + e->ensuresConstraints = constraintList_add(e->ensuresConstraints, cons); + } + else if (lltok_getTok (tok) == SUB_ASSIGN) + { + exprNode_exprTraverse (t1, TRUE, definaterv, sequencePoint); + exprNode_exprTraverse (t2, definatelv, TRUE, sequencePoint); + + cons = constraint_makeSubtractAssign (t1, t2, sequencePoint); + e->ensuresConstraints = constraintList_add(e->ensuresConstraints, cons); + } + else + { + exprNode_exprTraverse (t1, definatelv, definaterv, sequencePoint); + exprNode_exprTraverse (t2, definatelv, definaterv, sequencePoint); + } + + if (lltok_isBoolean_Op (tok)) + exprNode_booleanTraverse (e, definatelv, definaterv, sequencePoint); + + break; + case XPR_SIZEOFT: + /*drl 4-11-03 I think this is the same as the next case...*/ + + break; + + case XPR_SIZEOF: + /* drl 7-16-01 + C standard says operand to sizeof isn't evaluated unless + its a variable length array. So we don't generate constraints. + */ + + break; + + case XPR_CALL: + fcn = exprData_getFcn(data); + + exprNode_exprTraverse (fcn, definatelv, definaterv, sequencePoint); + DPRINTF (("Got call that %s (%s)", + exprNode_unparse(fcn), exprNodeList_unparse (exprData_getArgs (data)))); + + llassert( exprNode_isDefined(fcn) ); + + fcn->requiresConstraints = + constraintList_addListFree (fcn->requiresConstraints, + checkCall (fcn, exprData_getArgs (data))); + + fcn->ensuresConstraints = + constraintList_addListFree (fcn->ensuresConstraints, + exprNode_getPostConditions(fcn, exprData_getArgs (data),e )); + + t1 = exprNode_createNew (exprNode_getType (e)); + checkArgumentList (t1, exprData_getArgs(data), sequencePoint); + exprNode_mergeResolve (e, t1, fcn); + exprNode_free(t1); + break; + + case XPR_RETURN: + exprNode_exprTraverse (exprData_getSingle (data), definatelv, definaterv, sequencePoint); + break; + + case XPR_NULLRETURN: + + break; + + + case XPR_FACCESS: + exprNode_exprTraverse (exprData_getFieldNode (data), definatelv, definaterv, sequencePoint); + break; + + case XPR_ARROW: + exprNode_exprTraverse (exprData_getFieldNode (data), definatelv, definaterv, sequencePoint); + break; + + case XPR_STRINGLITERAL: + + break; + + case XPR_NUMLIT: + + break; + + case XPR_PREOP: + t1 = exprData_getUopNode(data); + + + /* drl 3/2/2003 we know this because of the type of expression*/ + llassert( exprNode_isDefined(t1) ); + + + tok = (exprData_getUopTok (data)); + exprNode_exprTraverse (t1, definatelv, definaterv, sequencePoint); + /*handle * pointer access */ + if (lltok_isIncOp (tok)) + { + DPRINTF(("doing ++(var)")); + t1 = exprData_getUopNode (data); + cons = constraint_makeMaxSetSideEffectPostIncrement (t1, sequencePoint); + e->ensuresConstraints = constraintList_add (e->ensuresConstraints, cons); + } + else if (lltok_isDecOp (tok)) + { + DPRINTF(("doing --(var)")); + t1 = exprData_getUopNode (data); + cons = constraint_makeMaxSetSideEffectPostDecrement (t1, sequencePoint); + e->ensuresConstraints = constraintList_add (e->ensuresConstraints, cons); + } + else if (lltok_isMult(tok )) + { + if (definatelv) + { + cons = constraint_makeWriteSafeInt (t1, 0); + } + else + { + cons = constraint_makeReadSafeInt (t1, 0); + } + e->requiresConstraints = constraintList_add(e->requiresConstraints, cons); + } + else if (lltok_isNotOp (tok)) + /* ! expr */ + { + constraintList_free(e->trueEnsuresConstraints); + + e->trueEnsuresConstraints = constraintList_copy (t1->falseEnsuresConstraints); + constraintList_free(e->falseEnsuresConstraints); + e->falseEnsuresConstraints = constraintList_copy (t1->trueEnsuresConstraints); + } + + else if (lltok_isAmpersand_Op (tok)) + { + break; + } + else if (lltok_isMinus_Op (tok)) + { + break; + } + else if (lltok_isExcl_Op (tok)) + { + break; + } + else if (lltok_isTilde_Op (tok)) + { + break; + } + else + { + llcontbug (message("Unsupported preop in %s", exprNode_unparse(e))); + BADEXIT; + } + break; + + case XPR_POSTOP: + exprNode_exprTraverse (exprData_getUopNode (data), TRUE, + definaterv, sequencePoint); + + if (lltok_isIncOp (exprData_getUopTok (data))) + { + DPRINTF(("doing ++")); + t1 = exprData_getUopNode (data); + cons = constraint_makeMaxSetSideEffectPostIncrement (t1, sequencePoint); + e->ensuresConstraints = constraintList_add (e->ensuresConstraints, cons); + } + if (lltok_isDecOp (exprData_getUopTok (data))) + { + DPRINTF(("doing --")); + t1 = exprData_getUopNode (data); + cons = constraint_makeMaxSetSideEffectPostDecrement (t1, sequencePoint); + e->ensuresConstraints = constraintList_add (e->ensuresConstraints, cons); + } + break; + case XPR_CAST: + { + t2 = exprData_getCastNode (data); + DPRINTF ((message ("Examining cast (%q)%s", + qtype_unparse (exprData_getCastType (data)), + exprNode_unparse (t2)) + )); + exprNode_exprTraverse (t2, definatelv, definaterv, sequencePoint); + } + break; + + case XPR_COND: + { + exprNode pred, trueBranch, falseBranch; + llassert(FALSE); + pred = exprData_getTriplePred (data); + trueBranch = exprData_getTripleTrue (data); + falseBranch = exprData_getTripleFalse (data); + + llassert (exprNode_isDefined (pred)); + llassert (exprNode_isDefined (trueBranch)); + llassert (exprNode_isDefined (falseBranch)); + + exprNode_exprTraverse (pred, FALSE, TRUE, sequencePoint); + + temp = pred->ensuresConstraints; + pred->ensuresConstraints = exprNode_traverseEnsuresConstraints(pred); + constraintList_free(temp); + + temp = pred->requiresConstraints; + pred->requiresConstraints = exprNode_traverseRequiresConstraints(pred); + constraintList_free(temp); + + temp = pred->trueEnsuresConstraints; + pred->trueEnsuresConstraints = exprNode_traverseTrueEnsuresConstraints(pred); + constraintList_free(temp); + + temp = pred->falseEnsuresConstraints; + pred->falseEnsuresConstraints = exprNode_traverseFalseEnsuresConstraints(pred); + constraintList_free(temp); + + exprNode_exprTraverse (trueBranch, FALSE, TRUE, sequencePoint); + + temp = trueBranch->ensuresConstraints; + trueBranch->ensuresConstraints = exprNode_traverseEnsuresConstraints(trueBranch); + constraintList_free(temp); + + temp = trueBranch->requiresConstraints; + trueBranch->requiresConstraints = exprNode_traverseRequiresConstraints(trueBranch); + constraintList_free(temp); + + temp = trueBranch->trueEnsuresConstraints; + trueBranch->trueEnsuresConstraints = exprNode_traverseTrueEnsuresConstraints(trueBranch); + constraintList_free(temp); + + temp = trueBranch->falseEnsuresConstraints; + trueBranch->falseEnsuresConstraints = exprNode_traverseFalseEnsuresConstraints(trueBranch); + constraintList_free(temp); + + exprNode_exprTraverse (falseBranch, FALSE, TRUE, sequencePoint); + + temp = falseBranch->ensuresConstraints; + falseBranch->ensuresConstraints = exprNode_traverseEnsuresConstraints(falseBranch); + constraintList_free(temp); + + + temp = falseBranch->requiresConstraints; + falseBranch->requiresConstraints = exprNode_traverseRequiresConstraints(falseBranch); + constraintList_free(temp); + + temp = falseBranch->trueEnsuresConstraints; + falseBranch->trueEnsuresConstraints = exprNode_traverseTrueEnsuresConstraints(falseBranch); + constraintList_free(temp); + + temp = falseBranch->falseEnsuresConstraints; + falseBranch->falseEnsuresConstraints = exprNode_traverseFalseEnsuresConstraints(falseBranch); + constraintList_free(temp); + + /* if pred is true e equals true otherwise pred equals false */ + + cons = constraint_makeEnsureEqual (e, trueBranch, sequencePoint); + trueBranch->ensuresConstraints = constraintList_add(trueBranch->ensuresConstraints, cons); + + cons = constraint_makeEnsureEqual (e, trueBranch, sequencePoint); + falseBranch->ensuresConstraints = constraintList_add(falseBranch->ensuresConstraints, cons); + + e = doIfElse (e, pred, trueBranch, falseBranch); + } + break; + case XPR_COMMA: + llassert(FALSE); + t1 = exprData_getPairA (data); + t2 = exprData_getPairB (data); + /* we essiantially treat this like expr1; expr2 + of course sequencePoint isn't adjusted so this isn't completely accurate + problems... + */ + exprNode_exprTraverse (t1, FALSE, FALSE, sequencePoint); + exprNode_exprTraverse (t2, definatelv, definaterv, sequencePoint); + exprNode_mergeResolve (e, t1, t2); + break; + + default: + break; + } + + e->requiresConstraints = constraintList_preserveOrig (e->requiresConstraints); + e->ensuresConstraints = constraintList_preserveOrig (e->ensuresConstraints); + e->requiresConstraints = constraintList_addGeneratingExpr (e->requiresConstraints, e); + e->ensuresConstraints = constraintList_addGeneratingExpr (e->ensuresConstraints, e); + e->requiresConstraints = constraintList_removeSurpressed (e->requiresConstraints); + + DPRINTF (("ensures constraints for %s are %s", + exprNode_unparse(e), constraintList_unparseDetailed (e->ensuresConstraints))); + + DPRINTF (("Requires constraints for %s are %s", exprNode_unparse(e), + constraintList_unparseDetailed(e->ensuresConstraints))); + + DPRINTF (("trueEnsures constraints for %s are %s", exprNode_unparse(e), + constraintList_unparseDetailed(e->trueEnsuresConstraints))); + + DPRINTF (("falseEnsures constraints for %s are %s", exprNode_unparse(e), + constraintList_unparseDetailed(e->falseEnsuresConstraints))); + return; +} + + +constraintList exprNode_traverseTrueEnsuresConstraints (exprNode e) +{ + exprNode t1; + + bool handledExprNode; + exprData data; + constraintList ret; + + if (exprNode_handleError (e)) + { + ret = constraintList_makeNew(); + return ret; + } + + ret = constraintList_copy (e->trueEnsuresConstraints); + + handledExprNode = TRUE; + + data = e->edata; + + switch (e->kind) + { + case XPR_WHILEPRED: + t1 = exprData_getSingle (data); + ret = constraintList_addListFree (ret, exprNode_traverseTrueEnsuresConstraints (t1)); + break; + + case XPR_FETCH: + + ret = constraintList_addListFree (ret, + exprNode_traverseTrueEnsuresConstraints + (exprData_getPairA (data))); + + ret = constraintList_addListFree (ret, + exprNode_traverseTrueEnsuresConstraints + (exprData_getPairB (data))); + break; + case XPR_PREOP: + + ret = constraintList_addListFree (ret, + exprNode_traverseTrueEnsuresConstraints + (exprData_getUopNode (data))); + break; + + case XPR_PARENS: + ret = constraintList_addListFree (ret, exprNode_traverseTrueEnsuresConstraints + (exprData_getUopNode (data))); + break; + + case XPR_INIT: + ret = constraintList_addListFree (ret, + exprNode_traverseTrueEnsuresConstraints + (exprData_getInitNode (data))); + break; + + + case XPR_ASSIGN: + ret = constraintList_addListFree (ret, + exprNode_traverseTrueEnsuresConstraints + (exprData_getOpA (data))); + + ret = constraintList_addListFree (ret, + exprNode_traverseTrueEnsuresConstraints + (exprData_getOpB (data))); + break; + case XPR_OP: + ret = constraintList_addListFree (ret, + exprNode_traverseTrueEnsuresConstraints + (exprData_getOpA (data))); + + ret = constraintList_addListFree (ret, + exprNode_traverseTrueEnsuresConstraints + (exprData_getOpB (data))); + break; + case XPR_SIZEOFT: + break; + + case XPR_SIZEOF: + + ret = constraintList_addListFree (ret, + exprNode_traverseTrueEnsuresConstraints + (exprData_getSingle (data))); + break; + + case XPR_CALL: + ret = constraintList_addListFree (ret, + exprNode_traverseTrueEnsuresConstraints + (exprData_getFcn (data))); + break; + + case XPR_RETURN: + ret = constraintList_addListFree (ret, + exprNode_traverseTrueEnsuresConstraints + (exprData_getSingle (data))); + break; + + case XPR_NULLRETURN: + break; + + case XPR_FACCESS: + ret = constraintList_addListFree (ret, + exprNode_traverseTrueEnsuresConstraints + (exprData_getFieldNode (data))); + break; + + case XPR_ARROW: + ret = constraintList_addListFree (ret, + exprNode_traverseTrueEnsuresConstraints + (exprData_getFieldNode (data))); + break; + + case XPR_STRINGLITERAL: + break; + + case XPR_NUMLIT: + break; + case XPR_POSTOP: + + ret = constraintList_addListFree (ret, + exprNode_traverseTrueEnsuresConstraints + (exprData_getUopNode (data))); + break; + + case XPR_CAST: + + ret = constraintList_addListFree (ret, + exprNode_traverseTrueEnsuresConstraints + (exprData_getCastNode (data))); + break; + + default: + break; + } + + return ret; +} +constraintList exprNode_traverseFalseEnsuresConstraints (exprNode e) +{ + exprNode t1; bool handledExprNode; exprData data; - constraint cons; + constraintList ret; - DPRINTF((message ("exprNode_exprTraverset Analysising %s %s at", exprNode_unparse( e), - fileloc_unparse(exprNode_getfileloc(e) ) ) ) ); - - e->requiresConstraints = constraintList_new(); - e->ensuresConstraints = constraintList_new(); - - if (exprNode_handleError (e)) - { - return FALSE; - } - - handledExprNode = TRUE; - + if (exprNode_handleError (e)) + { + ret = constraintList_makeNew(); + return ret; + } + + ret = constraintList_copy (e->falseEnsuresConstraints); + handledExprNode = TRUE; data = e->edata; switch (e->kind) { + case XPR_WHILEPRED: + t1 = exprData_getSingle (data); + ret = constraintList_addListFree (ret,exprNode_traverseFalseEnsuresConstraints (t1)); + break; case XPR_FETCH: - - if (definatelv ) - { - t1 = (exprData_getPairA (data) ); - t2 = (exprData_getPairB (data) ); - cons = constraint_makeWriteSafeExprNode (t1, t2); - } - else - { - t1 = (exprData_getPairA (data) ); - t2 = (exprData_getPairB (data) ); - cons = constraint_makeReadSafeExprNode (t1, t2 ); - } - - e->requiresConstraints = constraintList_add(e->requiresConstraints, cons); - cons = constraint_makeEnsureMaxReadAtLeast (t1, t2, sequencePoint); - e->ensuresConstraints = constraintList_add(e->ensuresConstraints, cons); - // cons = constraint_makeEnsureMinReadAtMost (t1, t2, sequencePoint); - // e->ensuresConstraints = constraintList_add(e->ensuresConstraints, cons); - - exprNode_exprTraverse (exprData_getPairA (data), FALSE, TRUE, sequencePoint); - exprNode_exprTraverse (exprData_getPairB (data), FALSE, TRUE, sequencePoint); - /*@i325 Should check which is array/index. */ + ret = constraintList_addListFree (ret, + exprNode_traverseFalseEnsuresConstraints + (exprData_getPairA (data))); + + ret = constraintList_addListFree (ret, + exprNode_traverseFalseEnsuresConstraints + (exprData_getPairB (data))); break; - case XPR_PREOP: - t1 = exprData_getUopNode(data); - lltok_unparse (exprData_getUopTok (data)); - exprNode_exprTraverse (exprData_getUopNode (data), definatelv, definaterv, sequencePoint ); - /*handle * pointer access */ - - /*@ i 325 do ++ and -- */ - if (lltok_isMult( exprData_getUopTok (data) ) ) - { - if (definatelv) - { - cons = constraint_makeWriteSafeInt (t1, 0); - } - else - { - cons = constraint_makeReadSafeInt (t1, 0); - } - e->requiresConstraints = constraintList_add(e->requiresConstraints, cons); - } - if (lltok_isInc_Op (exprData_getUopTok (data) ) ) - { - // cons = constraint_makeSideEffectPostIncrement (t1, sequencePoint); - // e->ensuresConstraints = constraintList_add(e->requiresConstraints, cons); - } + case XPR_PREOP: + + ret = constraintList_addListFree (ret, + exprNode_traverseFalseEnsuresConstraints + (exprData_getUopNode (data))); break; case XPR_PARENS: - exprNode_exprTraverse (exprData_getUopNode (e->edata), definatelv, definaterv, sequencePoint); - // e->constraints = constraintList_exprNodemerge (exprData_getUopNode (e->edata), exprNode_undefined); - break; - case XPR_ASSIGN: - exprNode_exprTraverse (exprData_getOpA (data), TRUE, definaterv, sequencePoint ); - lltok_unparse (exprData_getOpTok (data)); - exprNode_exprTraverse (exprData_getOpB (data), definatelv, TRUE, sequencePoint ); - // e->constraints = constraintList_exprNodemerge (exprData_getOpA (data), exprData_getOpB (data) ); + ret = constraintList_addListFree (ret, exprNode_traverseFalseEnsuresConstraints + (exprData_getUopNode (data))); break; + case XPR_INIT: + ret = constraintList_addListFree (ret, + exprNode_traverseFalseEnsuresConstraints + ( exprData_getInitNode (data))); + break; + + case XPR_ASSIGN: + ret = constraintList_addListFree (ret, + exprNode_traverseFalseEnsuresConstraints + (exprData_getOpA (data))); + + ret = constraintList_addListFree (ret, + exprNode_traverseFalseEnsuresConstraints + (exprData_getOpB (data))); + break; case XPR_OP: - exprNode_exprTraverse (exprData_getOpA (data), definatelv, definaterv, sequencePoint ); - lltok_unparse (exprData_getOpTok (data)); - exprNode_exprTraverse (exprData_getOpB (data), definatelv, definaterv, sequencePoint ); - - // e->constraints = constraintList_exprNodemerge (exprData_getOpA (data), exprData_getOpB (data)); - break; + ret = constraintList_addListFree (ret, + exprNode_traverseFalseEnsuresConstraints + (exprData_getOpA (data))); + + ret = constraintList_addListFree (ret, + exprNode_traverseFalseEnsuresConstraints + (exprData_getOpB (data))); + break; case XPR_SIZEOFT: - ctype_unparse (qtype_getType (exprData_getType (data) ) ); - break; case XPR_SIZEOF: - exprNode_exprTraverse (exprData_getSingle (data), definatelv, definaterv, sequencePoint ); - // e->constraints = constraintList_exprNodemerge (exprData_getSingle (e->edata), exprNode_undefined); - break; + + ret = constraintList_addListFree (ret, + exprNode_traverseFalseEnsuresConstraints + (exprData_getSingle (data))); + break; case XPR_CALL: - exprNode_exprTraverse (exprData_getFcn (data), definatelv, definaterv, sequencePoint ); - exprNodeList_unparse (exprData_getArgs (data) ); - // e->constraints = constraintList_add (e->constraints, constraint_create (e,exprNode_undefined, GT, CALLSAFE ) ); + ret = constraintList_addListFree (ret, + exprNode_traverseFalseEnsuresConstraints + (exprData_getFcn (data))); break; case XPR_RETURN: - exprNode_exprTraverse (exprData_getSingle (data), definatelv, definaterv, sequencePoint ); + ret = constraintList_addListFree (ret, + exprNode_traverseFalseEnsuresConstraints + (exprData_getSingle (data))); break; case XPR_NULLRETURN: - cstring_makeLiteral ("return");; break; - - + case XPR_FACCESS: - exprNode_exprTraverse (exprData_getFieldNode (data), definatelv, definaterv, sequencePoint ); - exprData_getFieldName (data) ; + ret = constraintList_addListFree (ret, + exprNode_traverseFalseEnsuresConstraints + (exprData_getFieldNode (data))); break; - + case XPR_ARROW: - exprNode_exprTraverse (exprData_getFieldNode (data), definatelv, definaterv, sequencePoint ); - exprData_getFieldName (data); + ret = constraintList_addListFree (ret, + exprNode_traverseFalseEnsuresConstraints + (exprData_getFieldNode (data))); break; case XPR_STRINGLITERAL: - cstring_copy (exprData_getLiteral (data)); break; case XPR_NUMLIT: - cstring_copy (exprData_getLiteral (data)); break; case XPR_POSTOP: - - exprNode_exprTraverse (exprData_getUopNode (data), TRUE, definaterv, sequencePoint ); - lltok_unparse (exprData_getUopTok (data)); - if (lltok_isInc_Op (exprData_getUopTok (data) ) ) - { - DPRINTF(("doing ++")); - t1 = exprData_getUopNode (data); - cons = constraint_makeMaxSetSideEffectPostIncrement (t1, sequencePoint ); - e->ensuresConstraints = constraintList_add (e->ensuresConstraints, cons); - // cons = constraint_makeMaxReadSideEffectPostIncrement (t1, sequencePoint ); - //e->ensuresConstraints = constraintList_add (e->ensuresConstraints, cons); - } + + ret = constraintList_addListFree (ret, + exprNode_traverseFalseEnsuresConstraints + (exprData_getUopNode (data))); + break; + + case XPR_CAST: + + ret = constraintList_addListFree (ret, + exprNode_traverseFalseEnsuresConstraints + (exprData_getCastNode (data))); break; + default: - handledExprNode = FALSE; + break; } - e->requiresConstraints = constraintList_preserveOrig ( e->requiresConstraints); - e->ensuresConstraints = constraintList_preserveOrig ( e->ensuresConstraints); - - return handledExprNode; + return ret; } + /* walk down the tree and get all requires Constraints in each subexpression*/ -constraintList exprNode_traversRequiresConstraints (exprNode e) +/*@only@*/ constraintList exprNode_traverseRequiresConstraints (exprNode e) { - // exprNode t1, t2; + exprNode t1; bool handledExprNode; - // char * mes; exprData data; constraintList ret; - ret = constraintList_copy (e->requiresConstraints ); + if (exprNode_handleError (e)) { + ret = constraintList_makeNew(); return ret; } - - handledExprNode = TRUE; - + + ret = constraintList_copy (e->requiresConstraints); + handledExprNode = TRUE; data = e->edata; switch (e->kind) { + case XPR_WHILEPRED: + t1 = exprData_getSingle (data); + ret = constraintList_addListFree (ret, exprNode_traverseRequiresConstraints (t1)); + break; case XPR_FETCH: - ret = constraintList_addList (ret, - exprNode_traversRequiresConstraints - (exprData_getPairA (data) ) ); + ret = constraintList_addListFree (ret, + exprNode_traverseRequiresConstraints + (exprData_getPairA (data))); - ret = constraintList_addList (ret, - exprNode_traversRequiresConstraints - (exprData_getPairB (data) ) ); + ret = constraintList_addListFree (ret, + exprNode_traverseRequiresConstraints + (exprData_getPairB (data))); break; case XPR_PREOP: - ret = constraintList_addList (ret, - exprNode_traversRequiresConstraints - (exprData_getUopNode (data) ) ); + ret = constraintList_addListFree (ret, + exprNode_traverseRequiresConstraints + (exprData_getUopNode (data))); break; case XPR_PARENS: - ret = constraintList_addList (ret, exprNode_traversRequiresConstraints - (exprData_getUopNode (data) ) ); + ret = constraintList_addListFree (ret, exprNode_traverseRequiresConstraints + (exprData_getUopNode (data))); break; + case XPR_INIT: + ret = constraintList_addListFree (ret, + exprNode_traverseRequiresConstraints + (exprData_getInitNode (data))); + break; + case XPR_ASSIGN: - ret = constraintList_addList (ret, - exprNode_traversRequiresConstraints - (exprData_getOpA (data) ) ); + ret = constraintList_addListFree (ret, + exprNode_traverseRequiresConstraints + (exprData_getOpA (data))); - ret = constraintList_addList (ret, - exprNode_traversRequiresConstraints - (exprData_getOpB (data) ) ); + ret = constraintList_addListFree (ret, + exprNode_traverseRequiresConstraints + (exprData_getOpB (data))); break; case XPR_OP: - ret = constraintList_addList (ret, - exprNode_traversRequiresConstraints - (exprData_getOpA (data) ) ); + ret = constraintList_addListFree (ret, + exprNode_traverseRequiresConstraints + (exprData_getOpA (data))); - ret = constraintList_addList (ret, - exprNode_traversRequiresConstraints - (exprData_getOpB (data) ) ); + ret = constraintList_addListFree (ret, + exprNode_traverseRequiresConstraints + (exprData_getOpB (data))); break; case XPR_SIZEOFT: - - // ctype_unparse (qtype_getType (exprData_getType (data) ) ); - break; case XPR_SIZEOF: - ret = constraintList_addList (ret, - exprNode_traversRequiresConstraints - (exprData_getSingle (data) ) ); + ret = constraintList_addListFree (ret, + exprNode_traverseRequiresConstraints + (exprData_getSingle (data))); break; case XPR_CALL: - ret = constraintList_addList (ret, - exprNode_traversRequiresConstraints - (exprData_getFcn (data) ) ); - /*@i11*/ // exprNodeList_unparse (exprData_getArgs (data) ); - break; + ret = constraintList_addListFree (ret, + exprNode_traverseRequiresConstraints + (exprData_getFcn (data))); + break; case XPR_RETURN: - ret = constraintList_addList (ret, - exprNode_traversRequiresConstraints - (exprData_getSingle (data) ) ); + ret = constraintList_addListFree (ret, + exprNode_traverseRequiresConstraints + (exprData_getSingle (data))); break; case XPR_NULLRETURN: - // cstring_makeLiteral ("return");; break; case XPR_FACCESS: - ret = constraintList_addList (ret, - exprNode_traversRequiresConstraints - (exprData_getFieldNode (data) ) ); - //exprData_getFieldName (data) ; + ret = constraintList_addListFree (ret, + exprNode_traverseRequiresConstraints + (exprData_getFieldNode (data))); break; - + case XPR_ARROW: - ret = constraintList_addList (ret, - exprNode_traversRequiresConstraints - (exprData_getFieldNode (data) ) ); - // exprData_getFieldName (data); + ret = constraintList_addListFree (ret, + exprNode_traverseRequiresConstraints + (exprData_getFieldNode (data))); break; case XPR_STRINGLITERAL: - // cstring_copy (exprData_getLiteral (data)); break; case XPR_NUMLIT: - // cstring_copy (exprData_getLiteral (data)); break; case XPR_POSTOP: - ret = constraintList_addList (ret, - exprNode_traversRequiresConstraints - (exprData_getUopNode (data) ) ); + ret = constraintList_addListFree (ret, + exprNode_traverseRequiresConstraints + (exprData_getUopNode (data))); break; + + case XPR_CAST: + + ret = constraintList_addListFree (ret, + exprNode_traverseRequiresConstraints + (exprData_getCastNode (data))); + break; + default: break; } @@ -601,145 +1995,384 @@ constraintList exprNode_traversRequiresConstraints (exprNode e) /* walk down the tree and get all Ensures Constraints in each subexpression*/ -constraintList exprNode_traversEnsuresConstraints (exprNode e) +/*@only@*/ constraintList exprNode_traverseEnsuresConstraints (exprNode e) { - // exprNode t1, t2; + exprNode t1; bool handledExprNode; - // char * mes; exprData data; - // constraintExpr tmp; - // constraint cons; constraintList ret; - ret = constraintList_copy (e->ensuresConstraints ); - if (exprNode_handleError (e)) - { - return ret; - } - - handledExprNode = TRUE; - - data = e->edata; - DPRINTF( (message ( - "exprnode_traversEnsuresConstraints call for %s with constraintList of %s", + if (exprNode_handleError (e)) + { + ret = constraintList_makeNew(); + return ret; + } + + ret = constraintList_copy (e->ensuresConstraints); + handledExprNode = TRUE; + + data = e->edata; + + DPRINTF ((message ("exprnode_traversEnsuresConstraints call for %s with " + "constraintList of %s", exprNode_unparse (e), - constraintList_print(e->ensuresConstraints) + constraintList_unparse(e->ensuresConstraints) ) )); switch (e->kind) { + case XPR_WHILEPRED: + t1 = exprData_getSingle (data); + ret = constraintList_addListFree (ret,exprNode_traverseEnsuresConstraints (t1)); + break; case XPR_FETCH: + ret = constraintList_addListFree (ret, + exprNode_traverseEnsuresConstraints + (exprData_getPairA (data))); - ret = constraintList_addList (ret, - exprNode_traversEnsuresConstraints - (exprData_getPairA (data) ) ); - - ret = constraintList_addList (ret, - exprNode_traversEnsuresConstraints - (exprData_getPairB (data) ) ); + ret = constraintList_addListFree (ret, + exprNode_traverseEnsuresConstraints + (exprData_getPairB (data))); break; case XPR_PREOP: - - ret = constraintList_addList (ret, - exprNode_traversEnsuresConstraints - (exprData_getUopNode (data) ) ); + ret = constraintList_addListFree (ret, + exprNode_traverseEnsuresConstraints + (exprData_getUopNode (data))); break; case XPR_PARENS: - ret = constraintList_addList (ret, exprNode_traversEnsuresConstraints - (exprData_getUopNode (data) ) ); + ret = constraintList_addListFree (ret, exprNode_traverseEnsuresConstraints + (exprData_getUopNode (data))); + break; + + case XPR_INIT: + ret = constraintList_addListFree (ret, + exprNode_traverseEnsuresConstraints + (exprData_getInitNode (data))); break; + + case XPR_ASSIGN: - ret = constraintList_addList (ret, - exprNode_traversEnsuresConstraints - (exprData_getOpA (data) ) ); - - ret = constraintList_addList (ret, - exprNode_traversEnsuresConstraints - (exprData_getOpB (data) ) ); - break; - case XPR_OP: - ret = constraintList_addList (ret, - exprNode_traversEnsuresConstraints - (exprData_getOpA (data) ) ); - - ret = constraintList_addList (ret, - exprNode_traversEnsuresConstraints - (exprData_getOpB (data) ) ); - break; - case XPR_SIZEOFT: + ret = constraintList_addListFree (ret, + exprNode_traverseEnsuresConstraints + (exprData_getOpA (data))); - // ctype_unparse (qtype_getType (exprData_getType (data) ) ); + ret = constraintList_addListFree (ret, + exprNode_traverseEnsuresConstraints + (exprData_getOpB (data))); + break; + case XPR_OP: + ret = constraintList_addListFree (ret, + exprNode_traverseEnsuresConstraints + (exprData_getOpA (data))); + ret = constraintList_addListFree (ret, + exprNode_traverseEnsuresConstraints + (exprData_getOpB (data))); + break; + case XPR_SIZEOFT: break; case XPR_SIZEOF: - - ret = constraintList_addList (ret, - exprNode_traversEnsuresConstraints - (exprData_getSingle (data) ) ); - break; - + ret = constraintList_addListFree (ret, + exprNode_traverseEnsuresConstraints + (exprData_getSingle (data))); + break; case XPR_CALL: - ret = constraintList_addList (ret, - exprNode_traversEnsuresConstraints - (exprData_getFcn (data) ) ); - /*@i11*/ // exprNodeList_unparse (exprData_getArgs (data) ); - break; - + ret = constraintList_addListFree (ret, + exprNode_traverseEnsuresConstraints + (exprData_getFcn (data))); + break; case XPR_RETURN: - ret = constraintList_addList (ret, - exprNode_traversEnsuresConstraints - (exprData_getSingle (data) ) ); + ret = constraintList_addListFree (ret, + exprNode_traverseEnsuresConstraints + (exprData_getSingle (data))); break; - case XPR_NULLRETURN: - // cstring_makeLiteral ("return");; break; - case XPR_FACCESS: - ret = constraintList_addList (ret, - exprNode_traversEnsuresConstraints - (exprData_getFieldNode (data) ) ); - //exprData_getFieldName (data) ; + ret = constraintList_addListFree (ret, + exprNode_traverseEnsuresConstraints + (exprData_getFieldNode (data))); break; - case XPR_ARROW: - ret = constraintList_addList (ret, - exprNode_traversEnsuresConstraints - (exprData_getFieldNode (data) ) ); - // exprData_getFieldName (data); + ret = constraintList_addListFree (ret, + exprNode_traverseEnsuresConstraints + (exprData_getFieldNode (data))); break; - case XPR_STRINGLITERAL: - // cstring_copy (exprData_getLiteral (data)); break; - case XPR_NUMLIT: - // cstring_copy (exprData_getLiteral (data)); break; case XPR_POSTOP: - - ret = constraintList_addList (ret, - exprNode_traversEnsuresConstraints - (exprData_getUopNode (data) ) ); - break; + ret = constraintList_addListFree (ret, + exprNode_traverseEnsuresConstraints + (exprData_getUopNode (data))); + break; + case XPR_CAST: + ret = constraintList_addListFree (ret, + exprNode_traverseEnsuresConstraints + (exprData_getCastNode (data))); + break; default: break; } -DPRINTF( (message ( - "exprnode_traversEnsuresConstraints call for %s with constraintList of is returning %s", - exprNode_unparse (e), - // constraintList_print(e->ensuresConstraints), - constraintList_print(ret) - ) - )); - + DPRINTF((message ("exprnode_traversEnsuresConstraints call for %s with " + "constraintList of is returning %s", + exprNode_unparse (e), + constraintList_unparse(ret)))); + return ret; } +/*drl moved out of constraintResolve.c 07-02-001 */ +void checkArgumentList (/*@out@*/ exprNode temp, exprNodeList arglist, + fileloc sequencePoint) +{ + + llassert(temp != NULL ); + + temp->requiresConstraints = constraintList_makeNew(); + temp->ensuresConstraints = constraintList_makeNew(); + temp->trueEnsuresConstraints = constraintList_makeNew(); + temp->falseEnsuresConstraints = constraintList_makeNew(); + + exprNodeList_elements (arglist, el) + { + constraintList temp2; + + llassert(exprNode_isDefined(el) ); + + exprNode_exprTraverse (el, FALSE, FALSE, sequencePoint); + temp2 = el->requiresConstraints; + el->requiresConstraints = exprNode_traverseRequiresConstraints(el); + constraintList_free(temp2); + + temp2 = el->ensuresConstraints; + el->ensuresConstraints = exprNode_traverseEnsuresConstraints(el); + constraintList_free(temp2); + + temp->requiresConstraints = constraintList_addList(temp->requiresConstraints, + el->requiresConstraints); + + temp->ensuresConstraints = constraintList_addList(temp->ensuresConstraints, + el->ensuresConstraints); + } + end_exprNodeList_elements; + +} + +/*drl moved out of constraintResolve.c 07-03-001 */ +constraintList exprNode_getPostConditions (exprNode fcn, exprNodeList arglist, exprNode fcnCall) +{ + constraintList postconditions; + uentry temp; + DPRINTF((message ("Got call that %s (%s) ", exprNode_unparse(fcn), exprNodeList_unparse (arglist)))); + + temp = exprNode_getUentry (fcn); + + postconditions = uentry_getFcnPostconditions (temp); + + if (constraintList_isDefined (postconditions)) + { + postconditions = constraintList_doSRefFixConstraintParam (postconditions, arglist); + postconditions = constraintList_doFixResult (postconditions, fcnCall); + } + else + { + postconditions = constraintList_makeNew(); + } + + return postconditions; +} + +/* +comment this out for now +we'll include it in a production release when its stable... + + void findStructs (exprNodeList arglist) +{ + + ctype ct, rt; + + DPRINTF(( + message("doing findStructs: %s", exprNodeList_unparse(arglist)) + )); + + + exprNodeList_elements(arglist, expr) + { + ct = exprNode_getType(expr); + + rt = ctype_realType (ct); + + if (ctype_isStruct (rt)) + TPRINTF((message("Found structure %s", exprNode_unparse(expr)) + )); + if (hasInvariants(ct)) + { + constraintList invars; + + invars = getInvariants(ct); + + + TPRINTF((message ("findStructs has invariants %s ", constraintList_unparse (invars)) + )); + + invars = constraintList_doSRefFixStructConstraint(invars, exprNode_getSref(expr), ct); + + + TPRINTF((message ("findStructs finded invariants to be %s ", constraintList_unparse (invars)) + )); + } + } + end_exprNodeList_elements; +} + +*/ + +/*drl moved out of constraintResolve.c 07-02-001 */ +constraintList checkCall (/*@dependent@*/ exprNode fcn, exprNodeList arglist) +{ + constraintList preconditions; + uentry temp; + DPRINTF((message ("Got call that %s (%s) ", exprNode_unparse(fcn), exprNodeList_unparse (arglist)))); + + temp = exprNode_getUentry (fcn); + + preconditions = uentry_getFcnPreconditions (temp); + + if (constraintList_isDefined(preconditions)) + { + preconditions = constraintList_togglePost (preconditions); + preconditions = constraintList_preserveCallInfo(preconditions, fcn); + preconditions = constraintList_doSRefFixConstraintParam (preconditions, arglist); + } + else + { + if (constraintList_isUndefined(preconditions)) + preconditions = constraintList_makeNew(); + } + + if (context_getFlag (FLG_IMPBOUNDSCONSTRAINTS)) + { + + /* + uentryList_elements (arglist, el) + { + sRef s; + TPRINTF((message("setImplicitfcnConstraints doing: %s", uentry_unparse(el) ) )); + + s = uentry_getSref(el); + if (sRef_isReference (s) ) + { + TPRINTF((message ("%s is a pointer", sRef_unparse(s) ) )); + } + else + { + TPRINTF((message ("%s is NOT a pointer", sRef_unparse(s) ) )); + } + //drl 4/26/01 + //chagned this from MaxSet(s) == 0 to MaxSet(s) >= 0 + c = constraint_makeSRefWriteSafeInt (s, 0); + + implicitFcnConstraints = constraintList_add(implicitFcnConstraints , c); + + //drl 10/23/2002 added support for out + if (!uentry_isOut(el) ) + { + c = constraint_makeSRefReadSafeInt (s, 0); + implicitFcnConstraints = constraintList_add(implicitFcnConstraints , c); + } + + + } + */ + } + + DPRINTF ((message("Done checkCall\n"))); + DPRINTF ((message("Returning list %q ", constraintList_unparseDetailed(preconditions)))); + + /* + drl we're going to comment this out for now + we'll include it if we're sure it's working + + findStructs(arglist); + */ + + return preconditions; +} + +/*drl added this function 10.29.001 + takes an exprNode of the form const + const + and sets the value +*/ +/*drl + I'm a bit nervous about modifying the exprNode + but this is the easy way to do this + If I have time I'd like to cause the exprNode to get created correctly in the first place */ +void exprNode_findValue(exprNode e) +{ + exprData data; + + exprNode t1, t2; + lltok tok; + + llassert(exprNode_isDefined(e) ); + + data = e->edata; + + if (exprNode_hasValue(e)) + return; + + if (e->kind == XPR_OP) + { + t1 = exprData_getOpA (data); + t2 = exprData_getOpB (data); + tok = exprData_getOpTok (data); + + exprNode_findValue(t1); + exprNode_findValue(t2); + + if (!(exprNode_knownIntValue(t1) && (exprNode_knownIntValue(t2)))) + return; + + if (lltok_isPlus_Op (tok)) + { + long v1, v2; + + v1 = exprNode_getLongValue(t1); + v2 = exprNode_getLongValue(t2); + + if (multiVal_isDefined(e->val)) + multiVal_free (e->val); + + e->val = multiVal_makeInt (v1 + v2); + } + + if (lltok_isMinus_Op (tok)) + { + long v1, v2; + + v1 = exprNode_getLongValue(t1); + v2 = exprNode_getLongValue(t2); + + if (multiVal_isDefined(e->val)) + { + multiVal_free (e->val); + } + + e->val = multiVal_makeInt (v1 - v2); + } + + /*drl I should really do * and / at some point */ + + } + +} +