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| author | Ulrich Drepper <drepper@redhat.com> | 2007-05-23 20:51:45 +0000 |
|---|---|---|
| committer | Ulrich Drepper <drepper@redhat.com> | 2007-05-23 20:51:45 +0000 |
| commit | 5a8075b116280d0c1ece277e4be75250efca45b2 (patch) | |
| tree | 7c63a4ba94c14bc46ececab97c299aff01078fb7 /nptl/init.c | |
| parent | 6d59823c29df228415836f289e62064f95849e71 (diff) | |
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* init.c (__pthread_initialize_minimal_internal): Check whether
private futexes are available.
* allocatestack.c (allocate_stack): Copy private_futex field from
current thread into the new stack.
* sysdeps/unix/sysv/linux/x86_64/libc-lowlevellock.S: Use private
futexes if they are available.
* sysdeps/unix/sysv/linux/i386/i486/libc-lowlevellock.S: Likewise
* sysdeps/unix/sysv/linux/x86_64/lowlevellock.S: Adjust so that change
in libc-lowlevellock.S allow using private futexes.
* sysdeps/unix/sysv/linux/i386/i486/lowlevellock.S: Likewise.
* sysdeps/unix/sysv/linux/x86_64/lowlevellock.h: Define
FUTEX_PRIVATE_FLAG.
* sysdeps/unix/sysv/linux/i386/lowlevellock.h: Likewise.
* sysdeps/unix/sysv/linux/x86_64/pthread_once.S: Use private futexes
if they are available.
* sysdeps/unix/sysv/linux/i386/pthread_once.S: Likewise.
* sysdeps/x86_64/tcb-offsets.sym: Add PRIVATE_FUTEX.
* sysdeps/i386/tcb-offsets.sym: Likewise.
* sysdeps/x86_64/tls.h (tcbhead_t): Add private_futex field.
* sysdeps/i386/tls.h (tcbhead_t): Likewise.
Diffstat (limited to 'nptl/init.c')
| -rw-r--r-- | nptl/init.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/nptl/init.c b/nptl/init.c index f67467aa5a..ff81087d0c 100644 --- a/nptl/init.c +++ b/nptl/init.c @@ -276,6 +276,18 @@ __pthread_initialize_minimal_internal (void) #endif set_robust_list_not_avail (); +#ifndef __ASSUME_PRIVATE_FUTEX + /* Private futexes are always used (at least internally) so that + doing the test once this early is beneficial. */ + { + int word; + res = INTERNAL_SYSCALL (futex, err, 3, &word, + FUTEX_WAKE | FUTEX_PRIVATE_FLAG, 1); + if (!INTERNAL_SYSCALL_ERROR_P (res, err)) + THREAD_SETMEM (pd, header.private_futex, FUTEX_PRIVATE_FLAG); + } +#endif + /* Set initial thread's stack block from 0 up to __libc_stack_end. It will be bigger than it actually is, but for unwind.c/pt-longjmp.c purposes this is good enough. */ |