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Code Issues Releases Activity

Protect p_stat with sched_lock.

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This commit is contained in:
John Baldwin 2000-12-01 23:43:15 +00:00
parent 6e01adb67f
commit 1c32c37c06
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=69501
1 changed files with 7 additions and 1 deletions
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8
sys/kern/kern_sig.c
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@ -1108,8 +1108,11 @@ psignal(p, sig)
* Defer further processing for signals which are held,
* except that stopped processes must be continued by SIGCONT.
*/
if (action == SIG_HOLD && (!(prop & SA_CONT) || p->p_stat != SSTOP))
mtx_enter(&sched_lock, MTX_SPIN);
if (action == SIG_HOLD && (!(prop & SA_CONT) || p->p_stat != SSTOP)) {
mtx_exit(&sched_lock, MTX_SPIN);
return;
}
s = splhigh();
switch (p->p_stat) {
@ -1242,6 +1245,7 @@ psignal(p, sig)
run:
setrunnable(p);
out:
mtx_exit(&sched_lock, MTX_SPIN);
splx(s);
}
@ -1417,9 +1421,11 @@ stop(p)
register struct proc *p;
{
mtx_enter(&sched_lock, MTX_SPIN);
p->p_stat = SSTOP;
p->p_flag &= ~P_WAITED;
wakeup((caddr_t)p->p_pptr);
mtx_exit(&sched_lock, MTX_SPIN);
}
/*