[cfe-commits] r47910 - /cfe/trunk/Analysis/GRExprEngine.cpp
Ted Kremenek
kremenek at apple.com
Tue Mar 4 14:01:56 PST 2008
Author: kremenek
Date: Tue Mar 4 16:01:56 2008
New Revision: 47910
URL: http://llvm.org/viewvc/llvm-project?rev=47910&view=rev
Log:
For the transfer function for CallExpr, invalidate all arguments
passed-by-reference to builtin functions until we have better builtin support.
Modified:
cfe/trunk/Analysis/GRExprEngine.cpp
Modified: cfe/trunk/Analysis/GRExprEngine.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/Analysis/GRExprEngine.cpp?rev=47910&r1=47909&r2=47910&view=diff
==============================================================================
--- cfe/trunk/Analysis/GRExprEngine.cpp (original)
+++ cfe/trunk/Analysis/GRExprEngine.cpp Tue Mar 4 16:01:56 2008
@@ -481,26 +481,11 @@
if (AI != AE) {
NodeSet DstTmp;
- Visit(*AI, Pred, DstTmp);
-
- Expr* CurrentArg = *AI;
+ Visit(*AI, Pred, DstTmp);
++AI;
- for (NodeSet::iterator DI=DstTmp.begin(), DE=DstTmp.end(); DI != DE; ++DI) {
- if (GetRVal((*DI)->getState(), CurrentArg).isUndef()) {
-
- NodeTy* N = Builder->generateNode(CE, (*DI)->getState(), *DI);
-
- if (N) {
- N->markAsSink();
- UndefArgs[N] = CurrentArg;
- }
-
- continue;
- }
-
+ for (NodeSet::iterator DI=DstTmp.begin(), DE=DstTmp.end(); DI != DE; ++DI)
VisitCall(CE, *DI, AI, AE, Dst);
- }
return;
}
@@ -529,16 +514,30 @@
if (L.isUndef() || isa<lval::ConcreteInt>(L)) {
NodeTy* N = Builder->generateNode(CE, St, *DI);
+
if (N) {
N->markAsSink();
BadCalls.insert(N);
}
+
continue;
}
- // Check for an "unknown" callee.
+ bool invalidateArgs = false;
if (L.isUnknown()) {
+ // Check for an "unknown" callee.
+ invalidateArgs = true;
+ }
+ else if (isa<lval::FuncVal>(L)) {
+
+ IdentifierInfo* Info = cast<lval::FuncVal>(L).getDecl()->getIdentifier();
+
+ if (Info->getBuiltinID())
+ invalidateArgs = true;
+ }
+
+ if (invalidateArgs) {
// Invalidate all arguments passed in by reference (LVals).
for (CallExpr::arg_iterator I = CE->arg_begin(), E = CE->arg_end();
I != E; ++I) {
@@ -548,8 +547,34 @@
St = SetRVal(St, cast<LVal>(V), UnknownVal());
}
}
- else
+ else {
+
+ // Check any arguments passed-by-value against being undefined.
+
+ bool badArg = false;
+
+ for (CallExpr::arg_iterator I = CE->arg_begin(), E = CE->arg_end();
+ I != E; ++I) {
+
+ if (GetRVal((*DI)->getState(), *I).isUndef()) {
+ NodeTy* N = Builder->generateNode(CE, (*DI)->getState(), *DI);
+
+ if (N) {
+ N->markAsSink();
+ UndefArgs[N] = *I;
+ }
+
+ badArg = true;
+ break;
+ }
+ }
+
+ if (badArg)
+ continue;
+
+ // Dispatch to the plug-in transfer function.
St = EvalCall(CE, cast<LVal>(L), (*DI)->getState());
+ }
// Check for the "noreturn" attribute.
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