From: Jan Alexander Steffens (heftig) <jan.steffens@gmail.com>
Date: Thu, 11 Sep 2014 21:01:16 +0000 (+0200)
Subject: Relax mark_mutex attribute needed to disable elision (Linux/x64)
X-Git-Tag: gc7_4_4~102
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=4be9570ec4057a2006c2f9774ebe925635bb69ee;p=gc

Relax mark_mutex attribute needed to disable elision (Linux/x64)

* pthread_support.c (setup_mark_lock): Pass PTHREAD_MUTEX_NORMAL
(instead of PTHREAD_MUTEX_ERRORCHECK) to pthread_mutexattr_settype
(actually, any valid settype call disables lock elision in glibc 2.19).
---

diff --git a/pthread_support.c b/pthread_support.c
index 59e50295..70958a32 100644
--- a/pthread_support.c
+++ b/pthread_support.c
@@ -2022,7 +2022,7 @@ static void setup_mark_lock(void)
       if (0 != pthread_mutexattr_init(&mattr)) {
         ABORT("pthread_mutexattr_init failed");
       }
-      if (0 != pthread_mutexattr_settype(&mattr, PTHREAD_MUTEX_ERRORCHECK)) {
+      if (0 != pthread_mutexattr_settype(&mattr, PTHREAD_MUTEX_NORMAL)) {
         ABORT("pthread_mutexattr_settype failed");
       }
       if (0 != pthread_mutex_init(&mark_mutex, &mattr)) {