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Give new wait4() another review pass

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Justine Tunney 2023-11-09 11:23:11 -08:00
parent ea28f93a26
commit b8d1377ae1
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1 changed files with 5 additions and 1 deletions
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6
libc/proc/wait4-nt.c
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@ -157,7 +157,7 @@ static textwindows int __proc_wait(int pid, int *wstatus, int options,
// check if killed or win32 error // check if killed or win32 error
if (wi) { if (wi) {
if (pr && --pr->waiters && pr->status == PROC_UNDEAD) { if (pr && !--pr->waiters && pr->status == PROC_UNDEAD) {
__proc_free(pr); __proc_free(pr);
} }
__proc_unlock(); __proc_unlock();
@ -180,6 +180,10 @@ static textwindows int __proc_wait(int pid, int *wstatus, int options,
case PROC_ALIVE: case PROC_ALIVE:
// exit caused by execve() reparenting // exit caused by execve() reparenting
__proc_unlock(); __proc_unlock();
if (!pr->waiters) {
// avoid deadlock that could theoretically happen
SetEvent(__proc.onbirth);
}
break; break;
case PROC_ZOMBIE: case PROC_ZOMBIE:
// exit happened and we're the first to know // exit happened and we're the first to know