Value *ShadowBase, bool DoPoison);
bool LooksLikeCodeInBug11395(Instruction *I);
- Module *CurrentModule;
LLVMContext *C;
TargetData *TD;
uint64_t MappingOffset;
Function *AsanInitFunction;
Instruction *CtorInsertBefore;
OwningPtr<FunctionBlackList> BL;
+ // Accesses sizes are powers of two: 1, 2, 4, 8, 16.
+ static const size_t kNumberOfAccessSizes = 5;
+ // This array is indexed by AccessIsWrite and log2(AccessSize).
+ Function *AsanErrorCallback[2][kNumberOfAccessSizes];
};
} // namespace
Instruction *AddressSanitizer::generateCrashCode(
IRBuilder<> &IRB, Value *Addr, bool IsWrite, uint32_t TypeSize) {
- // IsWrite and TypeSize are encoded in the function name.
- std::string FunctionName = std::string(kAsanReportErrorTemplate) +
- (IsWrite ? "store" : "load") + itostr(TypeSize / 8);
- Value *ReportWarningFunc = CurrentModule->getOrInsertFunction(
- FunctionName, IRB.getVoidTy(), IntptrTy, NULL);
- CallInst *Call = IRB.CreateCall(ReportWarningFunc, Addr);
+ size_t AccessSizeIndex = CountTrailingZeros_32(TypeSize / 8);
+ assert(AccessSizeIndex < kNumberOfAccessSizes);
+ CallInst *Call = IRB.CreateCall(AsanErrorCallback[IsWrite][AccessSizeIndex],
+ Addr);
Call->setDoesNotReturn();
return Call;
}
return false;
BL.reset(new FunctionBlackList(ClBlackListFile));
- CurrentModule = &M;
C = &(M.getContext());
LongSize = TD->getPointerSizeInBits();
IntptrTy = Type::getIntNTy(*C, LongSize);
AsanInitFunction->setLinkage(Function::ExternalLinkage);
IRB.CreateCall(AsanInitFunction);
+ // Create __asan_report* callbacks.
+ for (size_t AccessIsWrite = 0; AccessIsWrite <= 1; AccessIsWrite++) {
+ for (size_t AccessSizeIndex = 0; AccessSizeIndex < kNumberOfAccessSizes;
+ AccessSizeIndex++) {
+ // IsWrite and TypeSize are encoded in the function name.
+ std::string FunctionName = std::string(kAsanReportErrorTemplate) +
+ (AccessIsWrite ? "store" : "load") + itostr(1 << AccessSizeIndex);
+ AsanErrorCallback[AccessIsWrite][AccessSizeIndex] = cast<Function>(
+ M.getOrInsertFunction(FunctionName, IRB.getVoidTy(), IntptrTy, NULL));
+ }
+ }
+
llvm::Triple targetTriple(M.getTargetTriple());
bool isAndroid = targetTriple.getEnvironment() == llvm::Triple::ANDROIDEABI;