From 11d03f690e7fe019c33c3a066a9171c61f6d61f9 Mon Sep 17 00:00:00 2001
From: Mikhail Glushenkov <foldr@codedgers.com>
Date: Wed, 27 Oct 2010 09:09:04 +0000
Subject: [PATCH] Remove try/catch(...) from Win32/Signals.inc.

catch(...) is used in Win32/Signals.inc for catching Win32 structured
exceptions, but according to [1], this is wrong.

We can't simply change try/catch to __try/__finally, since this syntax is not
supported by MinGW. We can use __try/__finally on MSVC and __try1/__except1
macros on MinGW [2], but I think that that solution obfuscates the code too
much.

The use of try/catch(...) in Signals.inc makes it impossible to link
MinGW-compiled libSystem with llvm-gcc compiled executables. I propose that we
just remove try/catch(...) from Signals.inc, since the meaning of the code won't
change.

[1] http://members.cox.net/doug_web/eh.htm
[2] http://article.gmane.org/gmane.comp.compilers.llvm.cvs/81315

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117442 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/System/Makefile          | 5 -----
 lib/System/Win32/Signals.inc | 7 +------
 2 files changed, 1 insertion(+), 11 deletions(-)

diff --git a/lib/System/Makefile b/lib/System/Makefile
index bb013b9f1f1..5d4fda923f7 100644
--- a/lib/System/Makefile
+++ b/lib/System/Makefile
@@ -11,11 +11,6 @@ LEVEL = ../..
 LIBRARYNAME = LLVMSystem
 BUILD_ARCHIVE = 1
 REQUIRES_RTTI = 1
-include $(LEVEL)/Makefile.config
-
-ifeq ($(HOST_OS),MingW)
-  REQUIRES_EH := 1
-endif
 
 EXTRA_DIST = Unix Win32 README.txt
 
diff --git a/lib/System/Win32/Signals.inc b/lib/System/Win32/Signals.inc
index 8f880f7fdf6..3f33d89a031 100644
--- a/lib/System/Win32/Signals.inc
+++ b/lib/System/Win32/Signals.inc
@@ -208,8 +208,7 @@ void llvm::sys::RunInterruptHandlers() {
 }
 
 static LONG WINAPI LLVMUnhandledExceptionFilter(LPEXCEPTION_POINTERS ep) {
-  try {
-    Cleanup();
+  Cleanup();
 
 #ifdef _WIN64
   // TODO: provide a x64 friendly version of the following
@@ -291,10 +290,6 @@ static LONG WINAPI LLVMUnhandledExceptionFilter(LPEXCEPTION_POINTERS ep) {
 
 #endif
 
-  } catch (...) {
-      assert(0 && "Crashed in LLVMUnhandledExceptionFilter");
-  }
-
   if (ExitOnUnhandledExceptions)
     _exit(-3);