diff options
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 | 33 |
1 files changed, 24 insertions, 9 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 e572874d7a..065eb11813 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 @@ -61,11 +61,15 @@ __condvar_cleanup: subq $cond_lock, %rdi #endif -1: incq wakeup_seq(%rdi) +1: movl broadcast_seq(%rdi), %edx + cmpl 4(%r8), %edx + jne 3f + + incq wakeup_seq(%rdi) incq woken_seq(%rdi) - LOCK +3: LOCK #if cond_lock == 0 decl (%rdi) #else @@ -99,20 +103,23 @@ __pthread_cond_wait: .LSTARTCODE: pushq %r12 .Lpush_r12: - subq $64, %rsp +#define FRAME_SIZE 64 + subq $FRAME_SIZE, %rsp .Lsubq: /* Stack frame: rsp + 64 +--------------------------+ rsp + 32 | cleanup buffer | - +--------------------------+ + +--------------------------+ rsp + 24 | old wake_seq value | +--------------------------+ rsp + 16 | mutex pointer | +--------------------------+ rsp + 8 | condvar pointer | +--------------------------+ + rsp + 4 | old broadcast_seq value | + +--------------------------+ rsp + 0 | old cancellation mode | +--------------------------+ */ @@ -161,7 +168,9 @@ __pthread_cond_wait: /* Get and store current wakeup_seq value. */ movq 8(%rsp), %rdi movq wakeup_seq(%rdi), %r12 + movl broadcast_seq(%rdi), %edx movq %r12, 24(%rsp) + movl %edx, 4(%rsp) /* Unlock. */ 8: LOCK @@ -198,10 +207,15 @@ __pthread_cond_wait: #endif jnz 5f -6: movq woken_seq(%rdi), %rax +6: movl broadcast_seq(%rdi), %edx + + movq woken_seq(%rdi), %rax movq wakeup_seq(%rdi), %r12 + cmpl 4(%rsp), %edx + jne 16f + cmpq 24(%rsp), %r12 jbe 8b @@ -210,7 +224,8 @@ __pthread_cond_wait: incq woken_seq(%rdi) - LOCK + /* Unlock */ +16: LOCK #if cond_lock == 0 decl (%rdi) #else @@ -224,7 +239,7 @@ __pthread_cond_wait: movq 16(%rsp), %rdi callq __pthread_mutex_cond_lock -14: addq $64, %rsp +14: addq $FRAME_SIZE, %rsp .Laddq: popq %r12 @@ -242,7 +257,7 @@ __pthread_cond_wait: callq __lll_mutex_lock_wait jmp 2b - /* Unlock in loop requires waekup. */ + /* Unlock in loop requires wakeup. */ 3: #if cond_lock != 0 addq $cond_lock, %rdi @@ -343,7 +358,7 @@ versioned_symbol (libpthread, __pthread_cond_wait, pthread_cond_wait, .uleb128 2 .byte 0x40+.Lsubq-.Lpush_r12 # DW_CFA_advance_loc+N .byte 14 # DW_CFA_def_cfa_offset - .uleb128 80 + .uleb128 16+FRAME_SIZE .byte 2 # DW_CFA_advance_loc1 .byte .Laddq-.Lsubq .byte 14 # DW_CFA_def_cfa_offset |