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If a process is being debugged, skips job control caused by SIGSTOP/SIGCONT

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signals, because it is managed by debugger, however a normal signal sent to
a interruptibly sleeping thread wakes up the thread so it will handle the
signal when the process leaves the stopped state.

PR:	150138
MFC after:	1 week
This commit is contained in:
David Xu 2010-08-31 07:15:50 +00:00
parent 852ac373cb
commit 83b718eb07
1 changed files with 6 additions and 13 deletions
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19
sys/kern/kern_sig.c
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@ -2139,20 +2139,9 @@ tdsendsignal(struct proc *p, struct thread *td, int sig, ksiginfo_t *ksi)
* We try do the per-process part here.
*/
if (P_SHOULDSTOP(p)) {
/*
* The process is in stopped mode. All the threads should be
* either winding down or already on the suspended queue.
*/
if (p->p_flag & P_TRACED) {
/*
* The traced process is already stopped,
* so no further action is necessary.
* No signal can restart us.
*/
goto out;
}
if (sig == SIGKILL) {
if (p->p_flag & P_TRACED)
goto out;
/*
* SIGKILL sets process running.
* It will die elsewhere.
@ -2163,6 +2152,8 @@ tdsendsignal(struct proc *p, struct thread *td, int sig, ksiginfo_t *ksi)
}
if (prop & SA_CONT) {
if (p->p_flag & P_TRACED)
goto out;
/*
* If SIGCONT is default (or ignored), we continue the
* process but don't leave the signal in sigqueue as
@ -2207,6 +2198,8 @@ tdsendsignal(struct proc *p, struct thread *td, int sig, ksiginfo_t *ksi)
}
if (prop & SA_STOP) {
if (p->p_flag & P_TRACED)
goto out;
/*
* Already stopped, don't need to stop again
* (If we did the shell could get confused).