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[msan] Add track-origins argument to the pass constructor.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170544 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evgeniy Stepanov 2012-12-19 13:55:51 +00:00
parent ba2d6fba00
commit 33660cdfbd
2 changed files with 32 additions and 25 deletions
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2
include/llvm/Transforms/Instrumentation.h
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@ -44,7 +44,7 @@ ModulePass *createAddressSanitizerModulePass(
bool CheckInitOrder = false, StringRef BlacklistFile = StringRef());
// Insert MemorySanitizer instrumentation (detection of uninitialized reads)
FunctionPass *createMemorySanitizerPass();
FunctionPass *createMemorySanitizerPass(bool TrackOrigins = false);
// Insert ThreadSanitizer (race detection) instrumentation
FunctionPass *createThreadSanitizerPass();

55
lib/Transforms/Instrumentation/MemorySanitizer.cpp
View File

@ -134,7 +134,11 @@ namespace {
/// uninitialized reads.
class MemorySanitizer : public FunctionPass {
public:
MemorySanitizer() : FunctionPass(ID), TD(0), WarningFn(0) { }
MemorySanitizer(bool TrackOrigins = false)
: FunctionPass(ID),
TrackOrigins(TrackOrigins || ClTrackOrigins),
TD(0),
WarningFn(0) { }
const char *getPassName() const { return "MemorySanitizer"; }
bool runOnFunction(Function &F);
bool doInitialization(Module &M);
@ -143,6 +147,9 @@ class MemorySanitizer : public FunctionPass {
private:
void initializeCallbacks(Module &M);
/// \brief Track origins (allocation points) of uninitialized values.
bool TrackOrigins;
DataLayout *TD;
LLVMContext *C;
Type *IntptrTy;
@ -202,8 +209,8 @@ INITIALIZE_PASS(MemorySanitizer, "msan",
"MemorySanitizer: detects uninitialized reads.",
false, false)
FunctionPass *llvm::createMemorySanitizerPass() {
return new MemorySanitizer();
FunctionPass *llvm::createMemorySanitizerPass(bool TrackOrigins) {
return new MemorySanitizer(TrackOrigins);
}
/// \brief Create a non-const global initialized with the given string.
@ -322,7 +329,7 @@ bool MemorySanitizer::doInitialization(Module &M) {
"__msan_init", IRB.getVoidTy(), NULL)), 0);
new GlobalVariable(M, IRB.getInt32Ty(), true, GlobalValue::WeakODRLinkage,
IRB.getInt32(ClTrackOrigins), "__msan_track_origins");
IRB.getInt32(TrackOrigins), "__msan_track_origins");
return true;
}
@ -420,7 +427,7 @@ struct MemorySanitizerVisitor : public InstVisitor<MemorySanitizerVisitor> {
if (ClCheckAccessAddress)
insertCheck(Addr, &I);
if (ClTrackOrigins) {
if (MS.TrackOrigins) {
if (ClStoreCleanOrigin || isa<StructType>(Shadow->getType())) {
IRB.CreateStore(getOrigin(Val), getOriginPtr(Addr, IRB));
} else {
@ -461,7 +468,7 @@ struct MemorySanitizerVisitor : public InstVisitor<MemorySanitizerVisitor> {
MS.ColdCallWeights);
IRB.SetInsertPoint(CheckTerm);
if (ClTrackOrigins) {
if (MS.TrackOrigins) {
Instruction *Origin = InstrumentationList[i].Origin;
IRB.CreateStore(Origin ? (Value*)Origin : (Value*)IRB.getInt32(0),
MS.OriginTLS);
@ -491,7 +498,7 @@ struct MemorySanitizerVisitor : public InstVisitor<MemorySanitizerVisitor> {
for (size_t i = 0, n = ShadowPHINodes.size(); i < n; i++) {
PHINode *PN = ShadowPHINodes[i];
PHINode *PNS = cast<PHINode>(getShadow(PN));
PHINode *PNO = ClTrackOrigins ? cast<PHINode>(getOrigin(PN)) : 0;
PHINode *PNO = MS.TrackOrigins ? cast<PHINode>(getOrigin(PN)) : 0;
size_t NumValues = PN->getNumIncomingValues();
for (size_t v = 0; v < NumValues; v++) {
PNS->addIncoming(getShadow(PN, v), PN->getIncomingBlock(v));
@ -597,7 +604,7 @@ struct MemorySanitizerVisitor : public InstVisitor<MemorySanitizerVisitor> {
/// \brief Compute the origin address for a given function argument.
Value *getOriginPtrForArgument(Value *A, IRBuilder<> &IRB,
int ArgOffset) {
if (!ClTrackOrigins) return 0;
if (!MS.TrackOrigins) return 0;
Value *Base = IRB.CreatePointerCast(MS.ParamOriginTLS, MS.IntptrTy);
Base = IRB.CreateAdd(Base, ConstantInt::get(MS.IntptrTy, ArgOffset));
return IRB.CreateIntToPtr(Base, PointerType::get(MS.OriginTy, 0),
@ -625,7 +632,7 @@ struct MemorySanitizerVisitor : public InstVisitor<MemorySanitizerVisitor> {
/// \brief Set Origin to be the origin value for V.
void setOrigin(Value *V, Value *Origin) {
if (!ClTrackOrigins) return;
if (!MS.TrackOrigins) return;
assert(!OriginMap.count(V) && "Values may only have one origin");
DEBUG(dbgs() << "ORIGIN: " << *V << " ==> " << *Origin << "\n");
OriginMap[V] = Origin;
@ -713,7 +720,7 @@ struct MemorySanitizerVisitor : public InstVisitor<MemorySanitizerVisitor> {
}
DEBUG(dbgs() << " ARG: " << *AI << " ==> " <<
**ShadowPtr << "\n");
if (ClTrackOrigins) {
if (MS.TrackOrigins) {
Value* OriginPtr = getOriginPtrForArgument(AI, EntryIRB, ArgOffset);
setOrigin(A, EntryIRB.CreateLoad(OriginPtr));
}
@ -734,7 +741,7 @@ struct MemorySanitizerVisitor : public InstVisitor<MemorySanitizerVisitor> {
/// \brief Get the origin for a value.
Value *getOrigin(Value *V) {
if (!ClTrackOrigins) return 0;
if (!MS.TrackOrigins) return 0;
if (isa<Instruction>(V) || isa<Argument>(V)) {
Value *Origin = OriginMap[V];
if (!Origin) {
@ -787,7 +794,7 @@ struct MemorySanitizerVisitor : public InstVisitor<MemorySanitizerVisitor> {
if (ClCheckAccessAddress)
insertCheck(I.getPointerOperand(), &I);
if (ClTrackOrigins)
if (MS.TrackOrigins)
setOrigin(&I, IRB.CreateLoad(getOriginPtr(Addr, IRB)));
}
@ -958,7 +965,7 @@ struct MemorySanitizerVisitor : public InstVisitor<MemorySanitizerVisitor> {
}
}
if (ClTrackOrigins) {
if (MSV->MS.TrackOrigins) {
assert(OpOrigin);
if (!Origin) {
Origin = OpOrigin;
@ -975,7 +982,7 @@ struct MemorySanitizerVisitor : public InstVisitor<MemorySanitizerVisitor> {
/// \brief Add an application value to the mix.
Combiner &Add(Value *V) {
Value *OpShadow = MSV->getShadow(V);
Value *OpOrigin = ClTrackOrigins ? MSV->getOrigin(V) : 0;
Value *OpOrigin = MSV->MS.TrackOrigins ? MSV->getOrigin(V) : 0;
return Add(OpShadow, OpOrigin);
}
@ -987,7 +994,7 @@ struct MemorySanitizerVisitor : public InstVisitor<MemorySanitizerVisitor> {
Shadow = MSV->CreateShadowCast(IRB, Shadow, MSV->getShadowTy(I));
MSV->setShadow(I, Shadow);
}
if (ClTrackOrigins) {
if (MSV->MS.TrackOrigins) {
assert(Origin);
MSV->setOrigin(I, Origin);
}
@ -999,7 +1006,7 @@ struct MemorySanitizerVisitor : public InstVisitor<MemorySanitizerVisitor> {
/// \brief Propagate origin for arbitrary operation.
void setOriginForNaryOp(Instruction &I) {
if (!ClTrackOrigins) return;
if (!MS.TrackOrigins) return;
IRBuilder<> IRB(&I);
OriginCombiner OC(this, IRB);
for (Instruction::op_iterator OI = I.op_begin(); OI != I.op_end(); ++OI)
@ -1248,7 +1255,7 @@ struct MemorySanitizerVisitor : public InstVisitor<MemorySanitizerVisitor> {
// FIXME: use ClStoreCleanOrigin
// FIXME: factor out common code from materializeStores
if (ClTrackOrigins)
if (MS.TrackOrigins)
IRB.CreateStore(getOrigin(&I, 1), getOriginPtr(Addr, IRB));
return true;
}
@ -1270,7 +1277,7 @@ struct MemorySanitizerVisitor : public InstVisitor<MemorySanitizerVisitor> {
if (ClCheckAccessAddress)
insertCheck(Addr, &I);
if (ClTrackOrigins)
if (MS.TrackOrigins)
setOrigin(&I, IRB.CreateLoad(getOriginPtr(Addr, IRB)));
return true;
}
@ -1441,7 +1448,7 @@ struct MemorySanitizerVisitor : public InstVisitor<MemorySanitizerVisitor> {
Store = IRB.CreateAlignedStore(ArgShadow, ArgShadowBase,
kShadowTLSAlignment);
}
if (ClTrackOrigins)
if (MS.TrackOrigins)
IRB.CreateStore(getOrigin(A),
getOriginPtrForArgument(A, IRB, ArgOffset));
assert(Size != 0 && Store != 0);
@ -1484,7 +1491,7 @@ struct MemorySanitizerVisitor : public InstVisitor<MemorySanitizerVisitor> {
IRBAfter.CreateAlignedLoad(getShadowPtrForRetval(&I, IRBAfter),
kShadowTLSAlignment, "_msret");
setShadow(&I, RetvalShadow);
if (ClTrackOrigins)
if (MS.TrackOrigins)
setOrigin(&I, IRBAfter.CreateLoad(getOriginPtrForRetval(IRBAfter)));
}
@ -1496,7 +1503,7 @@ struct MemorySanitizerVisitor : public InstVisitor<MemorySanitizerVisitor> {
Value *ShadowPtr = getShadowPtrForRetval(RetVal, IRB);
DEBUG(dbgs() << "Return: " << *Shadow << "\n" << *ShadowPtr << "\n");
IRB.CreateAlignedStore(Shadow, ShadowPtr, kShadowTLSAlignment);
if (ClTrackOrigins)
if (MS.TrackOrigins)
IRB.CreateStore(getOrigin(RetVal), getOriginPtrForRetval(IRB));
}
}
@ -1506,7 +1513,7 @@ struct MemorySanitizerVisitor : public InstVisitor<MemorySanitizerVisitor> {
ShadowPHINodes.push_back(&I);
setShadow(&I, IRB.CreatePHI(getShadowTy(&I), I.getNumIncomingValues(),
"_msphi_s"));
if (ClTrackOrigins)
if (MS.TrackOrigins)
setOrigin(&I, IRB.CreatePHI(MS.OriginTy, I.getNumIncomingValues(),
"_msphi_o"));
}
@ -1526,7 +1533,7 @@ struct MemorySanitizerVisitor : public InstVisitor<MemorySanitizerVisitor> {
Size, I.getAlignment());
}
if (ClTrackOrigins) {
if (MS.TrackOrigins) {
setOrigin(&I, getCleanOrigin());
SmallString<2048> StackDescriptionStorage;
raw_svector_ostream StackDescription(StackDescriptionStorage);
@ -1551,7 +1558,7 @@ struct MemorySanitizerVisitor : public InstVisitor<MemorySanitizerVisitor> {
setShadow(&I, IRB.CreateSelect(I.getCondition(),
getShadow(I.getTrueValue()), getShadow(I.getFalseValue()),
"_msprop"));
if (ClTrackOrigins)
if (MS.TrackOrigins)
setOrigin(&I, IRB.CreateSelect(I.getCondition(),
getOrigin(I.getTrueValue()), getOrigin(I.getFalseValue())));
}