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- Use sched_lock to prevent the mutex name from changing out from under us

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while we are copying it to the kinfo_proc structure.
- Test against p_stat to see if we are blocked on a mutex.
- Terminate ki_mtxname with a null char rather than ki_wmesg.
This commit is contained in:
John Baldwin 2001-01-13 23:08:34 +00:00
parent 4c061a9da1
commit b947e93403
1 changed files with 5 additions and 3 deletions
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8
sys/kern/kern_proc.c
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@ -457,11 +457,14 @@ fill_kinfo_proc(p, kp)
strncpy(kp->ki_comm, p->p_comm, MAXCOMLEN);
kp->ki_comm[MAXCOMLEN] = 0;
}
if (p->p_blocked != 0) {
mtx_enter(&sched_lock, MTX_SPIN);
if (p->p_stat == SMTX) {
kp->ki_kiflag |= KI_MTXBLOCK;
strncpy(kp->ki_mtxname, p->p_mtxname, MTXNAMELEN);
kp->ki_wmesg[MTXNAMELEN] = 0;
kp->ki_mtxname[MTXNAMELEN] = 0;
}
kp->ki_stat = p->p_stat;
mtx_exit(&sched_lock, MTX_SPIN);
kp->ki_siglist = p->p_siglist;
kp->ki_sigmask = p->p_sigmask;
kp->ki_xstat = p->p_xstat;
@ -476,7 +479,6 @@ fill_kinfo_proc(p, kp)
kp->ki_priority = p->p_priority;
kp->ki_usrpri = p->p_usrpri;
kp->ki_nativepri = p->p_nativepri;
kp->ki_stat = p->p_stat;
kp->ki_nice = p->p_nice;
kp->ki_lock = p->p_lock;
kp->ki_rqindex = p->p_rqindex;