[asan] don't instrument globals that we've created ourselves (reduces the binary size a bit)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167230 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/Instrumentation/AddressSanitizer.cpp b/lib/Transforms/Instrumentation/AddressSanitizer.cpp
index adf7f0f..0c6a406 100644
--- a/lib/Transforms/Instrumentation/AddressSanitizer.cpp
+++ b/lib/Transforms/Instrumentation/AddressSanitizer.cpp
@@ -215,6 +215,7 @@
Function *AsanErrorCallback[2][kNumberOfAccessSizes];
InlineAsm *EmptyAsm;
SmallSet<GlobalValue*, 32> DynamicallyInitializedGlobals;
+ SmallSet<GlobalValue*, 32> GlobalsCreatedByAsan;
};
} // namespace
@@ -508,6 +509,7 @@
if (BL->isIn(*G)) return false;
if (!Ty->isSized()) return false;
if (!G->hasInitializer()) return false;
+ if (GlobalsCreatedByAsan.count(G)) return false; // Our own global.
// Touch only those globals that will not be defined in other modules.
// Don't handle ODR type linkages since other modules may be built w/o asan.
if (G->getLinkage() != GlobalVariable::ExternalLinkage &&
@@ -1090,9 +1092,10 @@
Value *BasePlus1 = IRB.CreateAdd(LocalStackBase,
ConstantInt::get(IntptrTy, LongSize/8));
BasePlus1 = IRB.CreateIntToPtr(BasePlus1, IntptrPtrTy);
- Value *Description = IRB.CreatePointerCast(
- createPrivateGlobalForString(*F.getParent(), StackDescription.str()),
- IntptrTy);
+ GlobalVariable *StackDescriptionGlobal =
+ createPrivateGlobalForString(*F.getParent(), StackDescription.str());
+ GlobalsCreatedByAsan.insert(StackDescriptionGlobal);
+ Value *Description = IRB.CreatePointerCast(StackDescriptionGlobal, IntptrTy);
IRB.CreateStore(Description, BasePlus1);
// Poison the stack redzones at the entry.