|
 |
00db10 |
commit b0a3c1640ab2fb7d16d9b9a8d9c0e524e9cb0001
|
|
|
00db10 |
Author: Andreas Schwab <schwab@suse.de>
|
|
|
00db10 |
Date: Tue Mar 4 13:00:26 2014 +0100
|
|
|
00db10 |
|
|
|
00db10 |
Properly handle forced elision in pthread_mutex_trylock (bug 16657)
|
|
|
00db10 |
|
|
|
00db10 |
Index: glibc-2.17-c758a686/nptl/pthread_mutex_trylock.c
|
|
|
00db10 |
===================================================================
|
|
|
00db10 |
--- glibc-2.17-c758a686.orig/nptl/pthread_mutex_trylock.c
|
|
|
00db10 |
+++ glibc-2.17-c758a686/nptl/pthread_mutex_trylock.c
|
|
|
00db10 |
@@ -26,8 +26,8 @@
|
|
|
00db10 |
#define lll_trylock_elision(a,t) lll_trylock(a)
|
|
|
00db10 |
#endif
|
|
|
00db10 |
|
|
|
00db10 |
-#ifndef DO_ELISION
|
|
|
00db10 |
-#define DO_ELISION(m) 0
|
|
|
00db10 |
+#ifndef FORCE_ELISION
|
|
|
00db10 |
+#define FORCE_ELISION(m, s)
|
|
|
00db10 |
#endif
|
|
|
00db10 |
|
|
|
00db10 |
/* We don't force elision in trylock, because this can lead to inconsistent
|
|
|
00db10 |
@@ -69,7 +69,7 @@ __pthread_mutex_trylock (mutex)
|
|
|
00db10 |
break;
|
|
|
00db10 |
|
|
|
00db10 |
case PTHREAD_MUTEX_TIMED_ELISION_NP:
|
|
|
00db10 |
- elision:
|
|
|
00db10 |
+ elision: __attribute__((unused))
|
|
|
00db10 |
if (lll_trylock_elision (mutex->__data.__lock,
|
|
|
00db10 |
mutex->__data.__elision) != 0)
|
|
|
00db10 |
break;
|
|
|
00db10 |
@@ -77,8 +77,7 @@ __pthread_mutex_trylock (mutex)
|
|
|
00db10 |
return 0;
|
|
|
00db10 |
|
|
|
00db10 |
case PTHREAD_MUTEX_TIMED_NP:
|
|
|
00db10 |
- if (DO_ELISION (mutex))
|
|
|
00db10 |
- goto elision;
|
|
|
00db10 |
+ FORCE_ELISION (mutex, goto elision);
|
|
|
00db10 |
/*FALL THROUGH*/
|
|
|
00db10 |
case PTHREAD_MUTEX_ADAPTIVE_NP:
|
|
|
00db10 |
case PTHREAD_MUTEX_ERRORCHECK_NP:
|
|
|
00db10 |
Index: glibc-2.17-c758a686/nptl/sysdeps/unix/sysv/linux/x86/force-elision.h
|
|
|
00db10 |
===================================================================
|
|
|
00db10 |
--- glibc-2.17-c758a686.orig/nptl/sysdeps/unix/sysv/linux/x86/force-elision.h
|
|
|
00db10 |
+++ glibc-2.17-c758a686/nptl/sysdeps/unix/sysv/linux/x86/force-elision.h
|
|
|
00db10 |
@@ -16,11 +16,6 @@
|
|
|
00db10 |
License along with the GNU C Library; if not, see
|
|
|
00db10 |
<http://www.gnu.org/licenses/>. */
|
|
|
00db10 |
|
|
|
00db10 |
-/* Check for elision on this lock without upgrading. */
|
|
|
00db10 |
-#define DO_ELISION(m) \
|
|
|
00db10 |
- (__pthread_force_elision \
|
|
|
00db10 |
- && (m->__data.__kind & PTHREAD_MUTEX_NO_ELISION_NP) == 0) \
|
|
|
00db10 |
-
|
|
|
00db10 |
/* Automatically enable elision for existing user lock kinds. */
|
|
|
00db10 |
#define FORCE_ELISION(m, s) \
|
|
|
00db10 |
if (__pthread_force_elision \
|