From: Jan Alexander Steffens (heftig) <jan.steffens@gmail.com>
Date: Thu, 11 Sep 2014 21:06:46 +0000 (+0200)
Subject: Also enable the TSX workaround for i386 (Linux)
X-Git-Tag: gc7_4_4~100
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=e91ab29a65c752db83d33edd3a54a1e4aac49b3c;p=gc

Also enable the TSX workaround for i386 (Linux)

* include/private/gcconfig.h (GLIBC_2_19_TSX_BUG): Define for
LINUX/I386 (if __GLIBC__).
---

diff --git a/include/private/gcconfig.h b/include/private/gcconfig.h
index d667d36e..b5ed075d 100644
--- a/include/private/gcconfig.h
+++ b/include/private/gcconfig.h
@@ -1357,6 +1357,11 @@
 #         define PREFETCH_FOR_WRITE(x) \
             __asm__ __volatile__ ("prefetchw %0" : : "m"(*(char *)(x)))
 #       endif
+#       if defined(__GLIBC__)
+          /* Workaround lock elision implementation for some glibc.     */
+#         define GLIBC_2_19_TSX_BUG
+#         include <gnu/libc-version.h> /* for gnu_get_libc_version() */
+#       endif
 #   endif
 #   ifdef CYGWIN32
 #       define OS_TYPE "CYGWIN32"