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When a STOP signal is being sent to a process, it is possible all

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threads in the process have already masked the signal, so job control
is delayed. But later a thread unmasking the STOP signal should enable
job control, so in issignal(), scanning all threads in process to see
if we can direct suspend some of them, not just suspend current thread.
This commit is contained in:
David Xu 2003-06-20 03:36:45 +00:00
parent 8b56079e2b
commit 062cf543fc
1 changed files with 16 additions and 2 deletions
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18
sys/kern/kern_sig.c
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@ -1760,8 +1760,12 @@ tdsignal(struct thread *td, int sig)
mtx_lock_spin(&sched_lock);
FOREACH_THREAD_IN_PROC(p, td0) {
if (TD_IS_SLEEPING(td0) &&
(td0->td_flags & TDF_SINTR))
(td0->td_flags & TDF_SINTR) &&
!TD_IS_SUSPENDED(td0)) {
thread_suspend_one(td0);
} else if (td != td0) {
td0->td_flags |= TDF_ASTPENDING;
}
}
thread_stopped(p);
if (p->p_numthreads == p->p_suspcount) {
@ -1898,7 +1902,8 @@ issignal(td)
struct proc *p;
struct sigacts *ps;
sigset_t sigpending;
register int sig, prop;
int sig, prop;
struct thread *td0;
p = td->td_proc;
ps = p->p_sigacts;
@ -2019,6 +2024,15 @@ issignal(td)
p->p_flag |= P_STOPPED_SIG;
p->p_xstat = sig;
mtx_lock_spin(&sched_lock);
FOREACH_THREAD_IN_PROC(p, td0) {
if (TD_IS_SLEEPING(td0) &&
(td0->td_flags & TDF_SINTR) &&
!TD_IS_SUSPENDED(td0)) {
thread_suspend_one(td0);
} else if (td != td0) {
td0->td_flags |= TDF_ASTPENDING;
}
}
thread_stopped(p);
thread_suspend_one(td);
PROC_UNLOCK(p);