diff options
| author | obrien <obrien@FreeBSD.org> | 2011-06-14 17:09:30 +0000 |
|---|---|---|
| committer | obrien <obrien@FreeBSD.org> | 2011-06-14 17:09:30 +0000 |
| commit | f797e31a8d7ffc81bda219abef89c378821566db (patch) | |
| tree | ec2169de1ebd2afc08af998e233233161d6de798 /sys/kern/kern_exit.c | |
| parent | 0b41fa9638f2db7aece9c1ee748bf6b0e621df18 (diff) | |
| download | FreeBSD-src-f797e31a8d7ffc81bda219abef89c378821566db.zip FreeBSD-src-f797e31a8d7ffc81bda219abef89c378821566db.tar.gz | |
We should not return ECHILD when debugging a child and the parent does a
"wait4(-1, ..., WNOHANG, ...)". Instead wait(2) should behave as if the
child does not wish to report status at this time.
Reviewed by: jhb
Diffstat (limited to 'sys/kern/kern_exit.c')
| -rw-r--r-- | sys/kern/kern_exit.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/sys/kern/kern_exit.c b/sys/kern/kern_exit.c index 6510e13..bb25d17 100644 --- a/sys/kern/kern_exit.c +++ b/sys/kern/kern_exit.c @@ -701,8 +701,9 @@ proc_reap(struct thread *td, struct proc *p, int *status, int options, */ if (p->p_oppid && (t = pfind(p->p_oppid)) != NULL) { PROC_LOCK(p); - p->p_oppid = 0; proc_reparent(p, t); + p->p_pptr->p_dbg_child--; + p->p_oppid = 0; PROC_UNLOCK(p); pksignal(t, SIGCHLD, p->p_ksi); wakeup(t); @@ -794,7 +795,8 @@ kern_wait(struct thread *td, pid_t pid, int *status, int options, pid = -q->p_pgid; PROC_UNLOCK(q); } - if (options &~ (WUNTRACED|WNOHANG|WCONTINUED|WNOWAIT|WLINUXCLONE)) + /* If we don't know the option, just return. */ + if (options & ~(WUNTRACED|WNOHANG|WCONTINUED|WNOWAIT|WLINUXCLONE)) return (EINVAL); loop: if (q->p_flag & P_STATCHILD) { @@ -873,7 +875,10 @@ loop: } if (nfound == 0) { sx_xunlock(&proctree_lock); - return (ECHILD); + if (td->td_proc->p_dbg_child) + return (0); + else + return (ECHILD); } if (options & WNOHANG) { sx_xunlock(&proctree_lock); |
