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wait: Delay wake-up parent within switch context

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Fujitsu: POSTK_DEBUG_TEMP_FIX_41
Refs: #1006
Change-Id: Ia98e896505ad0f6549766604ade84550eee8bd2d
This commit is contained in:
Ken Sato
2018-08-29 14:30:32 +09:00
committed by Masamichi Takagi
parent 0fdeb254b3
commit f57b0c5d4f
10 changed files with 280 additions and 43 deletions
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18
arch/arm64/kernel/syscall.c
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@@ -1176,19 +1176,10 @@ do_signal(unsigned long rc, void *regs0, struct thread *thread, struct sig_pendi
/* Reap and set new signal_flags */
proc->signal_flags = SIGNAL_STOP_STOPPED;
#ifdef POSTK_DEBUG_TEMP_FIX_41 /* early to wait4() wakeup for ptrace, fix. */
proc->status = PS_DELAY_STOPPED;
#else /* POSTK_DEBUG_TEMP_FIX_41 */
proc->status = PS_STOPPED;
#endif /* POSTK_DEBUG_TEMP_FIX_41 */
thread->status = PS_STOPPED;
mcs_rwlock_writer_unlock(&proc->update_lock, &lock);
#ifndef POSTK_DEBUG_TEMP_FIX_41 /* early to wait4() wakeup for ptrace, fix. */
/* Wake up the parent who tried wait4 and sleeping */
waitq_wakeup(&proc->parent->waitpid_q);
#endif /* !POSTK_DEBUG_TEMP_FIX_41 */
dkprintf("do_signal(): pid: %d, tid: %d SIGSTOP, sleeping\n",
proc->pid, thread->tid);
/* Sleep */
@@ -1205,19 +1196,10 @@ do_signal(unsigned long rc, void *regs0, struct thread *thread, struct sig_pendi
/* Update thread state in fork tree */
mcs_rwlock_writer_lock(&proc->update_lock, &lock);
thread->exit_status = SIGTRAP;
#ifdef POSTK_DEBUG_TEMP_FIX_41 /* early to wait4() wakeup for ptrace, fix. */
proc->status = PS_DELAY_TRACED;
#else /* POSTK_DEBUG_TEMP_FIX_41 */
proc->status = PS_TRACED;
#endif /* POSTK_DEBUG_TEMP_FIX_41 */
thread->status = PS_TRACED;
mcs_rwlock_writer_unlock(&proc->update_lock, &lock);
#ifndef POSTK_DEBUG_TEMP_FIX_41 /* early to wait4() wakeup for ptrace, fix. */
/* Wake up the parent who tried wait4 and sleeping */
waitq_wakeup(&thread->proc->parent->waitpid_q);
#endif /* !POSTK_DEBUG_TEMP_FIX_41 */
/* Sleep */
dkprintf("do_signal,SIGTRAP,sleeping\n");