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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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8
arch/arm64/kernel/ptrace.c
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@@ -957,11 +957,7 @@ void ptrace_report_signal(struct thread *thread, int sig)
}
thread->exit_status = sig;
/* Transition thread state */
#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;
proc->ptrace &= ~PT_TRACE_SYSCALL;
if (sig == SIGSTOP || sig == SIGTSTP ||
@@ -980,10 +976,6 @@ void ptrace_report_signal(struct thread *thread, int sig)
info._sifields._sigchld.si_pid = thread->tid;
info._sifields._sigchld.si_status = thread->exit_status;
do_kill(cpu_local_var(current), parent_pid, -1, SIGCHLD, &info, 0);
#ifndef POSTK_DEBUG_TEMP_FIX_41 /* early to wait4() wakeup for ptrace, fix. */
/* Wake parent (if sleeping in wait4()) */
waitq_wakeup(&proc->parent->waitpid_q);
#endif /* !POSTK_DEBUG_TEMP_FIX_41 */
dkprintf("ptrace_report_signal,sleeping\n");
/* Sleep */