diff options
Diffstat (limited to 'llvm/lib/Transforms/Instrumentation/AddressSanitizer.cpp')
| -rw-r--r-- | llvm/lib/Transforms/Instrumentation/AddressSanitizer.cpp | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/llvm/lib/Transforms/Instrumentation/AddressSanitizer.cpp b/llvm/lib/Transforms/Instrumentation/AddressSanitizer.cpp index cd7652d3c3a..87288388853 100644 --- a/llvm/lib/Transforms/Instrumentation/AddressSanitizer.cpp +++ b/llvm/lib/Transforms/Instrumentation/AddressSanitizer.cpp @@ -2190,7 +2190,13 @@ bool AddressSanitizerModule::InstrumentGlobals(IRBuilder<> &IRB, Module &M, bool GlobalAlias::create(GlobalValue::PrivateLinkage, "", NewGlobal); } - if (UseOdrIndicator) { + // ODR check is not useful for the following, but we see false reports + // caused by linker optimizations. + if (NewGlobal->hasLocalLinkage() || NewGlobal->hasGlobalUnnamedAddr() || + NewGlobal->hasLinkOnceODRLinkage() || NewGlobal->hasWeakODRLinkage()) { + ODRIndicator = ConstantExpr::getIntToPtr(ConstantInt::get(IntptrTy, -1), + IRB.getInt8PtrTy()); + } else if (UseOdrIndicator) { // With local aliases, we need to provide another externally visible // symbol __odr_asan_XXX to detect ODR violation. auto *ODRIndicatorSym = |
