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wait4(): save exit status only if requested

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Balazs Gerofi bgerofi@riken.jp
2014-05-12 10:29:58 +09:00
parent e5aad641ac
commit 39b336ca2f
1 changed files with 5 additions and 3 deletions
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8
kernel/syscall.c
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@ -303,8 +303,10 @@ rescan:
list_del(&child->siblings_list);
ihk_mc_spinlock_unlock_noirq(&proc->ftn->lock);
*status = child->exit_status;
if (status) {
*status = child->exit_status;
}
pid = child->pid;
release_fork_tree_node(child);
@ -386,7 +388,7 @@ terminate(int rc, int sig, ihk_mc_user_context_t *ctx)
ihk_mc_spinlock_lock_noirq(&ftn->lock);
ftn->pid = proc->pid;
ftn->exit_status = 0; // WIFEXITED gives true
ftn->exit_status = ((rc & 0x00ff) << 8) | (sig & 0x7f);
ftn->status = PS_ZOMBIE;
ihk_mc_spinlock_unlock_noirq(&ftn->lock);