From cf6e6c82c1ca243c3be191c59409d26f76ec8d38 Mon Sep 17 00:00:00 2001 From: Adrian McCarthy Date: Mon, 8 Jan 2018 16:33:42 +0000 Subject: Emit Function IDs table for Control Flow Guard Adds option /guard:cf to clang-cl and -cfguard to cc1 to emit function IDs of functions that have their address taken into a section named .gfids$y for compatibility with Microsoft's Control Flow Guard feature. Differential Revision: https://reviews.llvm.org/D40531 llvm-svn: 322005 --- clang/lib/CodeGen/CodeGenModule.cpp | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'clang/lib/CodeGen') diff --git a/clang/lib/CodeGen/CodeGenModule.cpp b/clang/lib/CodeGen/CodeGenModule.cpp index df33fc3e820..0a417548d4d 100644 --- a/clang/lib/CodeGen/CodeGenModule.cpp +++ b/clang/lib/CodeGen/CodeGenModule.cpp @@ -456,6 +456,10 @@ void CodeGenModule::Release() { // Indicate that we want CodeView in the metadata. getModule().addModuleFlag(llvm::Module::Warning, "CodeView", 1); } + if (CodeGenOpts.ControlFlowGuard) { + // We want function ID tables for Control Flow Guard. + getModule().addModuleFlag(llvm::Module::Warning, "cfguard", 1); + } if (CodeGenOpts.OptimizationLevel > 0 && CodeGenOpts.StrictVTablePointers) { // We don't support LTO with 2 with different StrictVTablePointers // FIXME: we could support it by stripping all the information introduced -- cgit v1.2.3