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* All files with FSF copyright notices: Update copyright dates
using scripts/update-copyrights.
* locale/programs/charmap-kw.h: Regenerated.
* locale/programs/locfile-kw.h: Likewise.
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This patch adds several new tunables to control the behavior of
elision on supported platforms[1]. Since elision now depends
on tunables, we should always *compile* with elision enabled,
and leave the code disabled, but available for runtime
selection. This gives us *much* better compile-time testing of
the existing code to avoid bit-rot[2].
Tested on ppc, ppc64, ppc64le, s390x and x86_64.
[1] This part of the patch was initially proposed by
Paul Murphy but was "staled" because the framework have changed
since the patch was originally proposed:
https://patchwork.sourceware.org/patch/10342/
[2] This part of the patch was inititally proposed as a RFC by
Carlos O'Donnell. Make sense to me integrate this on the patch:
https://sourceware.org/ml/libc-alpha/2017-05/msg00335.html
* elf/dl-tunables.list: Add elision parameters.
* manual/tunables.texi: Add entries about elision tunable.
* sysdeps/unix/sysv/linux/powerpc/elision-conf.c:
Add callback functions to dynamically enable/disable elision.
Add multiple callbacks functions to set elision parameters.
Deleted __libc_enable_secure check.
* sysdeps/unix/sysv/linux/s390/elision-conf.c: Likewise.
* sysdeps/unix/sysv/linux/x86/elision-conf.c: Likewise.
* configure: Regenerated.
* configure.ac: Option enable_lock_elision was deleted.
* config.h.in: ENABLE_LOCK_ELISION flag was deleted.
* config.make.in: Remove references to enable_lock_elision.
* manual/install.texi: Elision configure option was removed.
* INSTALL: Regenerated to remove enable_lock_elision.
* nptl/Makefile:
Disable elision so it can verify error case for destroying a mutex.
* sysdeps/powerpc/nptl/elide.h:
Cleanup ENABLE_LOCK_ELISION check.
Deleted macros for the case when ENABLE_LOCK_ELISION was not defined.
* sysdeps/s390/configure: Regenerated.
* sysdeps/s390/configure.ac: Remove references to enable_lock_elision..
* nptl/tst-mutex8.c:
Deleted all #ifndef ENABLE_LOCK_ELISION from the test.
* sysdeps/powerpc/powerpc32/sysdep.h:
Deleted all ENABLE_LOCK_ELISION checks.
* sysdeps/powerpc/powerpc64/sysdep.h: Likewise.
* sysdeps/powerpc/sysdep.h: Likewise.
* sysdeps/s390/nptl/bits/pthreadtypes-arch.h: Likewise.
* sysdeps/unix/sysv/linux/powerpc/force-elision.h: Likewise.
* sysdeps/unix/sysv/linux/s390/elision-conf.h: Likewise.
* sysdeps/unix/sysv/linux/s390/force-elision.h: Likewise.
* sysdeps/unix/sysv/linux/s390/lowlevellock.h: Likewise.
* sysdeps/unix/sysv/linux/s390/Makefile: Remove references to
enable-lock-elision.
Reviewed-by: Tulio Magno Quites Machado Filho <tuliom@linux.vnet.ibm.com>
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tst-mutex5 and 8 test some behaviour not required by POSIX,
that elision changes. This changes these tests to not check
this when elision is enabled at configure time.
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2013-05-09 Andi Kleen <ak@linux.intel.com>
* tst-mutex8.c (do_test): Check for ENABLE_PI.
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2003-06-22 Ulrich Drepper <drepper@redhat.com>
* pthreadP.h (__pthread_mutex_init_internal): Mark hidden.
(__pthread_mutex_lock_internal): Likewise.
(__pthread_mutex_unlock_internal): Likewise.
(__pthread_mutex_unlock_usercnt): Declare.
* pthread_mutex_destroy.c: Always fail if used in any way.
* pthread_mutex_init.c: Update comment.
* pthread_mutex_lock.c: If NO_INCR is not defined adjust __nusers.
* pthread_mutex_timedlock.c: Adjust __nusers.
* pthread_mutex_trylock.c: Adjust __nusers.
* pthread_mutex_unlock.c: Old code is in __pthread_mutex_unlock_usercnt
and public interfaces are wrapper with pass additional parameter.
__pthread_mutex_unlock_usercnt does not adjust __nusers if second
parameter zero.
* tst-mutex8.c: New file.
* Makefile (tests): Add tst-mutex8.
* sysdeps/pthread/pthread_cond_timedwait.c: Call
__pthread_mutex_unlock_usercnt.
* sysdeps/pthread/pthread_cond_wait.c: Likewise.
* sysdeps/unix/sysv/linux/i386/i486/pthread_cond_timedwait.S: Likewise.
* sysdeps/unix/sysv/linux/i386/i486/pthread_cond_wait.S: Likewise.
* sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S: Likewise.
* sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S: Likewise.
* sysdeps/unix/sysv/linux/pthread_mutex_cond_lock.c: Define NO_INCR.
* sysdeps/unix/sysv/linux/i386/bits/pthreadtypes.h (pthread_mutex_t):
Add __nusers.
* sysdeps/unix/sysv/linux/ia64/bits/pthreadtypes.h: Likewise.
* sysdeps/unix/sysv/linux/powerpc/bits/pthreadtypes.h: Likewise.
* sysdeps/unix/sysv/linux/s390/bits/pthreadtypes.h: Likewise.
* sysdeps/unix/sysv/linux/sh/bits/pthreadtypes.h: Likewise.
* sysdeps/unix/sysv/linux/x86_64/bits/pthreadtypes.h: Likewise.
* pthread_mutex_lock.c: Don't store THREAD_ID in __owner, use TID.
* pthread_mutex_timedlock.c: Likewise.
* pthread_mutex_trylock.c: Adjust __nusers.
* pthread_mutex_unlock.c: Compare with TID not THREAD_ID.
* tst-mutex9.c: New file.
* Makefile (tests): Add tst-mutex9.
* sysdeps/i386/tls.h: Remove THREAD_ID definition.
* sysdeps/ia64/tls.h: Likewise.
* sysdeps/powerpc/tls.h: Likewise.
* sysdeps/s390/tls.h: Likewise.
* sysdeps/sh/tls.h: Likewise.
* sysdeps/x86_64/tls.h: Likewise.
* sysdeps/unix/sysv/linux/i386/bits/pthreadtypes.h (pthread_mutex_t):
Change type of __owner.
* sysdeps/unix/sysv/linux/ia64/bits/pthreadtypes.h: Likewise.
* sysdeps/unix/sysv/linux/powerpc/bits/pthreadtypes.h: Likewise.
* sysdeps/unix/sysv/linux/s390/bits/pthreadtypes.h: Likewise.
* sysdeps/unix/sysv/linux/sh/bits/pthreadtypes.h: Likewise.
* sysdeps/unix/sysv/linux/x86_64/bits/pthreadtypes.h: Likewise.
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