From 588d6abf7d38fd7e7d189dbff79f16e995c2c79d Mon Sep 17 00:00:00 2001 From: Kostya Serebryany Date: Tue, 24 Jan 2012 19:25:38 +0000 Subject: The following patch adds __attribute__((no_address_safety_analysis)) which will allow to disable address safety analysis (such as e.g. AddressSanitizer or SAFECode) for a specific function. When building with AddressSanitizer, add AddressSafety function attribute to every generated function except for those that have __attribute__((no_address_safety_analysis)). With this patch we will be able to 1. disable AddressSanitizer for a particular function 2. disable AddressSanitizer-hostile optimizations (such as some cases of load widening) when AddressSanitizer is on. llvm-svn: 148842 --- clang/lib/CodeGen/CodeGenModule.cpp | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'clang/lib/CodeGen/CodeGenModule.cpp') diff --git a/clang/lib/CodeGen/CodeGenModule.cpp b/clang/lib/CodeGen/CodeGenModule.cpp index c54b904abcb..67059016f7d 100644 --- a/clang/lib/CodeGen/CodeGenModule.cpp +++ b/clang/lib/CodeGen/CodeGenModule.cpp @@ -1019,6 +1019,14 @@ CodeGenModule::GetOrCreateLLVMFunction(StringRef MangledName, if (ExtraAttrs != llvm::Attribute::None) F->addFnAttr(ExtraAttrs); + if (Features.AddressSanitizer) { + // When AddressSanitizer is enabled, set AddressSafety attribute + // unless __attribute__((no_address_safety_analysis)) is used. + const FunctionDecl *FD = cast_or_null(D.getDecl()); + if (!FD || !FD->hasAttr()) + F->addFnAttr(llvm::Attribute::AddressSafety); + } + // This is the first use or definition of a mangled name. If there is a // deferred decl with this name, remember that we need to emit it at the end // of the file. -- cgit v1.2.3