From: Chris Bieneman <beanz@apple.com>
Date: Fri, 3 Oct 2014 22:03:12 +0000 (+0000)
Subject: Converting the ErrorHandlerMutex to a ManagedStatic to avoid the static constructor... 
X-Git-Url: http://plrg.eecs.uci.edu/git/?p=oota-llvm.git;a=commitdiff_plain;h=be77ea38e6cb218e80954676b9a4bc561b8a02df

Converting the ErrorHandlerMutex to a ManagedStatic to avoid the static constructor and destructor.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219028 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Support/ErrorHandling.cpp b/lib/Support/ErrorHandling.cpp
index c36007f5599..8e650669d4b 100644
--- a/lib/Support/ErrorHandling.cpp
+++ b/lib/Support/ErrorHandling.cpp
@@ -20,6 +20,7 @@
 #include "llvm/Support/Debug.h"
 #include "llvm/Support/Errc.h"
 #include "llvm/Support/Signals.h"
+#include "llvm/Support/ManagedStatic.h"
 #include "llvm/Support/Mutex.h"
 #include "llvm/Support/MutexGuard.h"
 #include "llvm/Support/Threading.h"
@@ -41,18 +42,18 @@ using namespace llvm;
 static fatal_error_handler_t ErrorHandler = nullptr;
 static void *ErrorHandlerUserData = nullptr;
 
-static sys::Mutex ErrorHandlerMutex;
+static ManagedStatic<sys::Mutex> ErrorHandlerMutex;
 
 void llvm::install_fatal_error_handler(fatal_error_handler_t handler,
                                        void *user_data) {
-  llvm::MutexGuard Lock(ErrorHandlerMutex);
+  llvm::MutexGuard Lock(*ErrorHandlerMutex);
   assert(!ErrorHandler && "Error handler already registered!\n");
   ErrorHandler = handler;
   ErrorHandlerUserData = user_data;
 }
 
 void llvm::remove_fatal_error_handler() {
-  llvm::MutexGuard Lock(ErrorHandlerMutex);
+  llvm::MutexGuard Lock(*ErrorHandlerMutex);
   ErrorHandler = nullptr;
   ErrorHandlerUserData = nullptr;
 }
@@ -75,7 +76,7 @@ void llvm::report_fatal_error(const Twine &Reason, bool GenCrashDiag) {
   {
     // Only acquire the mutex while reading the handler, so as not to invoke a
     // user-supplied callback under a lock.
-    llvm::MutexGuard Lock(ErrorHandlerMutex);
+    llvm::MutexGuard Lock(*ErrorHandlerMutex);
     handler = ErrorHandler;
     handlerData = ErrorHandlerUserData;
   }