[Bug nptl/16657] Lock elision breaks pthread_mutex_destroy

["cvs-commit at gcc dot gnu.org" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=16657

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The branch, azanella/lockelision-ppc has been created
        at  9fba46fff61c04bb1ec8bec9ab51202ee6e1b2e4 (commit)

- Log -----------------------------------------------------------------
https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=9fba46fff61c04bb1ec8bec9ab51202ee6e1b2e4

commit 9fba46fff61c04bb1ec8bec9ab51202ee6e1b2e4
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=7cb8358e83af829ba2756182d7d5a25ebb292fac

commit 7cb8358e83af829ba2756182d7d5a25ebb292fac
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=486e99da18df01e8cabbcaa578fcb6402c479a54

commit 486e99da18df01e8cabbcaa578fcb6402c479a54
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=f4335e87a7d5e2339123fbeaa0ef2f8f7797e6d4

commit f4335e87a7d5e2339123fbeaa0ef2f8f7797e6d4
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=585a5fbda268d5ed265c5ecd81607c54864471ca

commit 585a5fbda268d5ed265c5ecd81607c54864471ca
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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