diff options
| author | Ulrich Drepper <drepper@redhat.com> | 2004-09-02 18:59:24 +0000 |
|---|---|---|
| committer | Ulrich Drepper <drepper@redhat.com> | 2004-09-02 18:59:24 +0000 |
| commit | 73f7c32c47ab2397935d9fc2aeaa594794b38c7e (patch) | |
| tree | 1a0f7d20c9009fbd67c33495f9db0a5d665092b3 /nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S | |
| parent | 86aca5ac58e152336e676bc1231acac6adc32068 (diff) | |
[BZ #357]
Update.
2004-09-02 Steven Munroe <sjmunroe@us.ibm.com>
[BZ #357]
* stdlib/tst-setcontext.c (test_stack): Added test for stack clobber.
(main): Call test_stack.
* sysdeps/unix/sysv/linux/powerpc/powerpc32/getcontext.S
(__getcontext): Push stack frame then save parms in local frame.
Improve instruction scheduling.
* sysdeps/unix/sysv/linux/powerpc/powerpc32/swapcontext.S
(__swapcontext): Likewise.
Diffstat (limited to 'nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S')
| -rw-r--r-- | nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S | 51 |
1 files changed, 45 insertions, 6 deletions
diff --git a/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S b/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S index 9e7da301d3..f5de0a280c 100644 --- a/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S +++ b/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S @@ -40,6 +40,8 @@ .globl __condvar_cleanup .hidden __condvar_cleanup __condvar_cleanup: + pushq %r12 + /* Get internal lock. */ movq %rdi, %r8 movq 8(%rdi), %rdi @@ -66,12 +68,28 @@ __condvar_cleanup: jne 3f incq wakeup_seq(%rdi) - incq woken_seq(%rdi) - incl cond_futex(%rdi) -3: LOCK +3: subl $(1 << clock_bits), cond_nwaiters(%rdi) + + /* Wake up a thread which wants to destroy the condvar object. */ + xorq %r12, %r12 + cmpq $0xffffffffffffffff, total_seq(%rdi) + jne 4f + movl cond_nwaiters(%rdi), %eax + andl $~((1 << clock_bits) - 1), %eax + jne 4f + + addq $cond_nwaiters, %rdi + movq $SYS_futex, %rax + movq $FUTEX_WAKE, %rsi + movl $1, %edx + syscall + subq $cond_nwaiters, %rdi + movq $1, %r12 + +4: LOCK #if cond_lock == 0 decl (%rdi) #else @@ -84,15 +102,19 @@ __condvar_cleanup: callq __lll_mutex_unlock_wake /* Wake up all waiters to make sure no signal gets lost. */ -2: addq $cond_futex, %rdi +2: testq %r12, %r12 + jnz 5f + addq $cond_futex, %rdi movq $FUTEX_WAKE, %rsi movl $0x7fffffff, %edx movq $SYS_futex, %rax syscall - movq 16(%r8), %rdi +5: movq 16(%r8), %rdi callq __pthread_mutex_cond_lock + popq %r12 + retq .size __condvar_cleanup, .-__condvar_cleanup @@ -157,6 +179,7 @@ __pthread_cond_wait: movq 8(%rsp), %rdi incq total_seq(%rdi) incl cond_futex(%rdi) + addl $(1 << clock_bits), cond_nwaiters(%rdi) /* Install cancellation handler. */ #ifdef PIC @@ -229,7 +252,23 @@ __pthread_cond_wait: incq woken_seq(%rdi) /* Unlock */ -16: LOCK +16: subl $(1 << clock_bits), cond_nwaiters(%rdi) + + /* Wake up a thread which wants to destroy the condvar object. */ + cmpq $0xffffffffffffffff, total_seq(%rdi) + jne 17f + movl cond_nwaiters(%rdi), %eax + andl $~((1 << clock_bits) - 1), %eax + jne 17f + + addq $cond_nwaiters, %rdi + movq $SYS_futex, %rax + movq $FUTEX_WAKE, %rsi + movl $1, %edx + syscall + subq $cond_nwaiters, %rdi + +17: LOCK #if cond_lock == 0 decl (%rdi) #else |