diff options
Diffstat (limited to 'nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S')
| -rw-r--r-- | nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S b/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S index b669abb573..eb133266c6 100644 --- a/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S +++ b/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S @@ -771,10 +771,24 @@ __condvar_cleanup2: movl $SYS_futex, %eax syscall + /* Lock the mutex only if we don't own it already. This only happens + in case of PI mutexes, if we got cancelled after a successful + return of the futex syscall and before disabling async + cancellation. */ 5: movq 16(%rsp), %rdi - callq __pthread_mutex_cond_lock + movl MUTEX_KIND(%rdi), %eax + andl $(ROBUST_BIT|PI_BIT), %eax + cmpl $PI_BIT, %eax + jne 7f + + movl (%rdi), %eax + andl $TID_MASK, %eax + cmpl %eax, %fs:TID + je 8f + +7: callq __pthread_mutex_cond_lock - movq 24(%rsp), %rdi +8: movq 24(%rsp), %rdi movq FRAME_SIZE(%rsp), %r15 movq FRAME_SIZE+8(%rsp), %r14 movq FRAME_SIZE+16(%rsp), %r13 |