From 28a26c8d996aa82a80e8586720af789d3afa8739 Mon Sep 17 00:00:00 2001 From: Kostya Serebryany Date: Tue, 21 Aug 2012 06:53:28 +0000 Subject: [asan] If we are compiling with ASan, add metadata indicating dynamically initialized globals. Patch by Reid Watson, reviewed by Richard Smith llvm-svn: 162259 --- clang/lib/CodeGen/CodeGenModule.cpp | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'clang/lib/CodeGen/CodeGenModule.cpp') diff --git a/clang/lib/CodeGen/CodeGenModule.cpp b/clang/lib/CodeGen/CodeGenModule.cpp index 3ae3c521300..840a18ead42 100644 --- a/clang/lib/CodeGen/CodeGenModule.cpp +++ b/clang/lib/CodeGen/CodeGenModule.cpp @@ -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) -- cgit v1.2.3