From 1a8030e73798920aee4868a1137a300b8bfd3ab3 Mon Sep 17 00:00:00 2001
From: Evgeniy Stepanov <eugeni.stepanov@gmail.com>
Date: Fri, 7 Apr 2017 23:00:38 +0000
Subject: [cfi] Emit __cfi_check stub in the frontend.

Previously __cfi_check was created in LTO optimization pipeline, which
means LLD has no way of knowing about the existence of this symbol
without rescanning the LTO output object. As a result, LLD fails to
export __cfi_check, even when given --export-dynamic-symbol flag.

llvm-svn: 299806
---
 clang/lib/CodeGen/CodeGenModule.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'clang/lib/CodeGen/CodeGenModule.cpp')

diff --git a/clang/lib/CodeGen/CodeGenModule.cpp b/clang/lib/CodeGen/CodeGenModule.cpp
index 479a390..6bc7d4f1 100644
--- a/clang/lib/CodeGen/CodeGenModule.cpp
+++ b/clang/lib/CodeGen/CodeGenModule.cpp
@@ -406,8 +406,10 @@ void CodeGenModule::Release() {
   EmitDeferredUnusedCoverageMappings();
   if (CoverageMapping)
     CoverageMapping->emit();
-  if (CodeGenOpts.SanitizeCfiCrossDso)
+  if (CodeGenOpts.SanitizeCfiCrossDso) {
     CodeGenFunction(*this).EmitCfiCheckFail();
+    CodeGenFunction(*this).EmitCfiCheckStub();
+  }
   emitAtAvailableLinkGuard();
   emitLLVMUsed();
   if (SanStats)
-- 
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