bool IsWrite, size_t AccessSizeIndex,
Value *SizeArgument);
void instrumentMemIntrinsic(MemIntrinsic *MI);
- void instrumentMemIntrinsicParam(Instruction *OrigIns, Value *Addr,
- Value *Size, Instruction *InsertBefore,
- bool IsWrite, bool UseCalls);
Value *memToShadow(Value *Shadow, IRBuilder<> &IRB);
bool runOnFunction(Function &F) override;
bool maybeInsertAsanInitAtFunctionEntry(Function &F);
return IRB.CreateAdd(Shadow, ConstantInt::get(IntptrTy, Mapping.Offset));
}
-void AddressSanitizer::instrumentMemIntrinsicParam(Instruction *OrigIns,
- Value *Addr, Value *Size,
- Instruction *InsertBefore,
- bool IsWrite,
- bool UseCalls) {
- IRBuilder<> IRB(InsertBefore);
- if (Size->getType() != IntptrTy)
- Size = IRB.CreateIntCast(Size, IntptrTy, false);
- // Check the first byte.
- instrumentAddress(OrigIns, InsertBefore, Addr, 8, IsWrite, Size, false);
- // Check the last byte.
- IRB.SetInsertPoint(InsertBefore);
- Value *SizeMinusOne = IRB.CreateSub(Size, ConstantInt::get(IntptrTy, 1));
- Value *AddrLong = IRB.CreatePointerCast(Addr, IntptrTy);
- Value *AddrLast = IRB.CreateAdd(AddrLong, SizeMinusOne);
- instrumentAddress(OrigIns, InsertBefore, AddrLast, 8, IsWrite, Size, false);
-}
-
// Instrument memset/memmove/memcpy
void AddressSanitizer::instrumentMemIntrinsic(MemIntrinsic *MI) {
IRBuilder<> IRB(MI);
// and the last bytes. We call __asan_report_*_n(addr, real_size) to be able
// to report the actual access size.
IRBuilder<> IRB(I);
- Value *LastByte = IRB.CreateIntToPtr(
- IRB.CreateAdd(IRB.CreatePointerCast(Addr, IntptrTy),
- ConstantInt::get(IntptrTy, TypeSize / 8 - 1)),
- OrigPtrTy);
Value *Size = ConstantInt::get(IntptrTy, TypeSize / 8);
- instrumentAddress(I, I, Addr, 8, IsWrite, Size, false);
- instrumentAddress(I, I, LastByte, 8, IsWrite, Size, false);
+ Value *AddrLong = IRB.CreatePointerCast(Addr, IntptrTy);
+ if (UseCalls) {
+ CallInst *Check =
+ IRB.CreateCall2(AsanMemoryAccessCallbackSized[IsWrite], AddrLong, Size);
+ Check->setDebugLoc(I->getDebugLoc());
+ } else {
+ Value *LastByte = IRB.CreateIntToPtr(
+ IRB.CreateAdd(AddrLong, ConstantInt::get(IntptrTy, TypeSize / 8 - 1)),
+ OrigPtrTy);
+ instrumentAddress(I, I, Addr, 8, IsWrite, Size, false);
+ instrumentAddress(I, I, LastByte, 8, IsWrite, Size, false);
+ }
}
// Validate the result of Module::getOrInsertFunction called for an interface