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[Bug nptl/16657] Lock elision breaks pthread_mutex_destroy
- From: "cvs-commit at gcc dot gnu.org" <sourceware-bugzilla at sourceware dot org>
- To: glibc-bugs at sourceware dot org
- Date: Mon, 25 Aug 2014 13:05:45 +0000
- Subject: [Bug nptl/16657] Lock elision breaks pthread_mutex_destroy
- Auto-submitted: auto-generated
- References: <bug-16657-131 at http dot sourceware dot org/bugzilla/>
https://sourceware.org/bugzilla/show_bug.cgi?id=16657
--- Comment #29 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot gnu.org> ---
This is an automated email from the git hooks/post-receive script. It was
generated because a ref change was pushed to the repository containing
the project "GNU C Library master sources".
The branch, azanella/lockelision-ppc has been created
at 60027c63e2110612cd3b05a32c89c299a8e20a3a (commit)
- Log -----------------------------------------------------------------
https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=60027c63e2110612cd3b05a32c89c299a8e20a3a
commit 60027c63e2110612cd3b05a32c89c299a8e20a3a
Author: Adhemerval Zanella <azanella@linux.vnet.ibm.com>
Date: Wed Aug 20 15:50:58 2014 -0400
PowerPC: abort transaction in syscalls
Linux kernel powerpc documentation states issuing a syscall inside a
transaction is not recommended and may lead to undefined behavior. It
also states syscalls does not abort transactoin neither they run in
transactional state.
To avoid side-effects being visible outside transactions, GLIBC with lock
elision enable issues a transaction abort instruction just before all
syscalls if hardware supports hardware transactions.
https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=f173d8d0dfb557c50c5d8bf26755716a444e2e0d
commit f173d8d0dfb557c50c5d8bf26755716a444e2e0d
Author: Adhemerval Zanella <azanella@linux.vnet.ibm.com>
Date: Wed Jun 25 15:13:46 2014 -0400
PowerPC: Add adaptive elision to rwlocks
This patch adds support for lock elision using ISA 2.07 hardware
transactional memory for rwlocks.
https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=1fef4f021fe32317095e2bf936d54d530290d055
commit 1fef4f021fe32317095e2bf936d54d530290d055
Author: Adhemerval Zanella <azanella@linux.vnet.ibm.com>
Date: Fri Mar 21 08:26:59 2014 -0400
PowerPC: Adjusting LE mutex destroy
This patch adjust the pthread_mutex_t destroy to take acocunt of lock
elision.
https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=29e18b25d1b574bcaeb7422ec8b103e3463ba7b4
commit 29e18b25d1b574bcaeb7422ec8b103e3463ba7b4
Author: Andreas Schwab <schwab@suse.de>
Date: Thu Mar 27 16:50:04 2014 -0400
Skip checks in pthread_mutex_destroy when doing elision
When doing elisison the __nusers field is not updated, thus can have an
arbitrary value.
[BZ #16657]
* nptl/pthread_mutex_destroy.c (__pthread_mutex_destroy): Skip
checks when doing elision.
* nptl/sysdeps/unix/sysv/linux/x86/pthread_mutex_destroy.c: New
* file.
https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=247cf3825e280047de915f3dab767cae02c7cf98
commit 247cf3825e280047de915f3dab767cae02c7cf98
Author: Adhemerval Zanella <azanella@linux.vnet.ibm.com>
Date: Wed Aug 20 15:57:10 2014 -0400
PowerPC: Add the low level infrastructure for pthreads lock elision
This patch adds support for lock elision using ISA 2.07 hardware
transactional memory instructions.
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