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Revert r99024, "Augment path diagnostics to include displaying when a message 

expression", statistical evidence indicates it has some kind of memory error.

llvm-svn: 99040
This commit is contained in:
Daniel Dunbar 2010-03-20 04:28:39 +00:00
parent fe06df4bf3
commit 4e3e0991e9
3 changed files with 4 additions and 51 deletions
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2
clang/include/clang/Checker/BugReporter/BugReporter.h
View File

@ -467,8 +467,6 @@ void registerTrackNullOrUndefValue(BugReporterContext& BRC, const void *stmt,
void registerFindLastStore(BugReporterContext& BRC, const void *memregion,
const ExplodedNode *N);
void registerNilReceiverVisitor(BugReporterContext &BRC);
} // end namespace clang::bugreporter

2
clang/lib/Checker/BugReporter.cpp
View File

@ -1613,9 +1613,7 @@ void GRBugReporter::GeneratePathDiagnostic(PathDiagnostic& PD,
else
return;
// Register node visitors.
R->registerInitialVisitors(PDB, N);
bugreporter::registerNilReceiverVisitor(PDB);
switch (PDB.getGenerationScheme()) {
case PathDiagnosticClient::Extensive:

51
clang/lib/Checker/BugReporterVisitors.cpp
View File

@ -103,6 +103,7 @@ public:
const ExplodedNode *Node = N, *Last = NULL;
for ( ; Node ; Last = Node, Node = Node->getFirstPred()) {
if (const VarRegion *VR = dyn_cast<VarRegion>(R)) {
if (const PostStmt *P = Node->getLocationAs<PostStmt>())
if (const DeclStmt *DS = P->getStmtAs<DeclStmt>())
@ -247,6 +248,7 @@ public:
// Check if in the previous state it was feasible for this constraint
// to *not* be true.
if (PrevN->getState()->Assume(Constraint, !Assumption)) {
isSatisfied = true;
// As a sanity check, make sure that the negation of the constraint
@ -257,8 +259,8 @@ public:
// We found the transition point for the constraint. We now need to
// pretty-print the constraint. (work-in-progress)
llvm::SmallString<256> sbuf;
llvm::raw_svector_ostream os(sbuf);
std::string sbuf;
llvm::raw_string_ostream os(sbuf);
if (isa<Loc>(Constraint)) {
os << "Assuming pointer value is ";
@ -363,48 +365,3 @@ void clang::bugreporter::registerFindLastStore(BugReporterContext& BRC,
BRC.addVisitor(new FindLastStoreBRVisitor(V, R));
}
namespace {
class NilReceiverVisitor : public BugReporterVisitor {
public:
NilReceiverVisitor() {}
PathDiagnosticPiece* VisitNode(const ExplodedNode *N,
const ExplodedNode *PrevN,
BugReporterContext& BRC) {
const PostStmt *P = N->getLocationAs<PostStmt>();
if (!P)
return 0;
const ObjCMessageExpr *ME = P->getStmtAs<ObjCMessageExpr>();
if (!ME)
return 0;
const Expr *Receiver = ME->getReceiver();
if (!Receiver)
return 0;
const GRState *state = N->getState();
const SVal &V = state->getSVal(Receiver);
const DefinedOrUnknownSVal *DV = dyn_cast<DefinedOrUnknownSVal>(&V);
if (!DV)
return 0;
state = state->Assume(*DV, true);
if (state)
return 0;
// The receiver was nil, and hence the method was skipped.
// Register a BugReporterVisitor to issue a message telling us how
// the receiver was null.
bugreporter::registerTrackNullOrUndefValue(BRC, Receiver, N);
//Issue a message saying that the method was skipped.
PathDiagnosticLocation L(Receiver, BRC.getSourceManager());
return new PathDiagnosticEventPiece(L, "No method actually called "
"because the receiver is nil");
}
};
} // end anonymous namespace
void clang::bugreporter::registerNilReceiverVisitor(BugReporterContext &BRC) {
BRC.addVisitor(new NilReceiverVisitor());
}