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[asan] If we are compiling with ASan, add metadata indicating dynamically initialized globals. Patch by Reid Watson, reviewed by Richard Smith

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llvm-svn: 162259
This commit is contained in:
Kostya Serebryany
2012-08-21 06:53:28 +00:00
parent 6b745b5281
commit 28a26c8d99
1 changed files with 12 additions and 0 deletions
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12
clang/lib/CodeGen/CodeGenModule.cpp
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@@ -1682,6 +1682,18 @@ void CodeGenModule::EmitGlobalVarDefinition(const VarDecl *D) {
if (NeedsGlobalCtor || NeedsGlobalDtor)
EmitCXXGlobalVarDeclInitFunc(D, GV, NeedsGlobalCtor);
// If we are compiling with ASan, add metadata indicating dynamically
// initialized globals.
if (LangOpts.AddressSanitizer && NeedsGlobalCtor) {
llvm::Module &M = getModule();
llvm::NamedMDNode *DynamicInitializers =
M.getOrInsertNamedMetadata("llvm.asan.dynamically_initialized_globals");
llvm::Value *GlobalToAdd[] = { GV };
llvm::MDNode *ThisGlobal = llvm::MDNode::get(VMContext, GlobalToAdd);
DynamicInitializers->addOperand(ThisGlobal);
}
// Emit global variable debug information.
if (CGDebugInfo *DI = getModuleDebugInfo())
if (getCodeGenOpts().DebugInfo >= CodeGenOptions::LimitedDebugInfo)