mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-24 11:29:10 +00:00
90af4afacb
- Move struct sigacts out of the u-area and malloc() it using the M_SUBPROC malloc bucket. - Add a small sigacts_*() API for managing sigacts structures: sigacts_alloc(), sigacts_free(), sigacts_copy(), sigacts_share(), and sigacts_shared(). - Remove the p_sigignore, p_sigacts, and p_sigcatch macros. - Add a mutex to struct sigacts that protects all the members of the struct. - Add sigacts locking. - Remove Giant from nosys(), kill(), killpg(), and kern_sigaction() now that sigacts is locked. - Several in-kernel functions such as psignal(), tdsignal(), trapsignal(), and thread_stopped() are now MP safe. Reviewed by: arch@ Approved by: re (rwatson)
595 lines
14 KiB
C
595 lines
14 KiB
C
/*-
|
|
* Copyright (c) 2000 Jake Burkholder <jake@freebsd.org>.
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#include "opt_ktrace.h"
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/lock.h>
|
|
#include <sys/mutex.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/ktr.h>
|
|
#include <sys/condvar.h>
|
|
#include <sys/sched.h>
|
|
#include <sys/signalvar.h>
|
|
#include <sys/resourcevar.h>
|
|
#ifdef KTRACE
|
|
#include <sys/uio.h>
|
|
#include <sys/ktrace.h>
|
|
#endif
|
|
|
|
/*
|
|
* Common sanity checks for cv_wait* functions.
|
|
*/
|
|
#define CV_ASSERT(cvp, mp, td) do { \
|
|
KASSERT((td) != NULL, ("%s: curthread NULL", __func__)); \
|
|
KASSERT(TD_IS_RUNNING(td), ("%s: not TDS_RUNNING", __func__)); \
|
|
KASSERT((cvp) != NULL, ("%s: cvp NULL", __func__)); \
|
|
KASSERT((mp) != NULL, ("%s: mp NULL", __func__)); \
|
|
mtx_assert((mp), MA_OWNED | MA_NOTRECURSED); \
|
|
} while (0)
|
|
|
|
#ifdef INVARIANTS
|
|
#define CV_WAIT_VALIDATE(cvp, mp) do { \
|
|
if (TAILQ_EMPTY(&(cvp)->cv_waitq)) { \
|
|
/* Only waiter. */ \
|
|
(cvp)->cv_mtx = (mp); \
|
|
} else { \
|
|
/* \
|
|
* Other waiter; assert that we're using the \
|
|
* same mutex. \
|
|
*/ \
|
|
KASSERT((cvp)->cv_mtx == (mp), \
|
|
("%s: Multiple mutexes", __func__)); \
|
|
} \
|
|
} while (0)
|
|
|
|
#define CV_SIGNAL_VALIDATE(cvp) do { \
|
|
if (!TAILQ_EMPTY(&(cvp)->cv_waitq)) { \
|
|
KASSERT(mtx_owned((cvp)->cv_mtx), \
|
|
("%s: Mutex not owned", __func__)); \
|
|
} \
|
|
} while (0)
|
|
|
|
#else
|
|
#define CV_WAIT_VALIDATE(cvp, mp)
|
|
#define CV_SIGNAL_VALIDATE(cvp)
|
|
#endif
|
|
|
|
static void cv_timedwait_end(void *arg);
|
|
|
|
/*
|
|
* Initialize a condition variable. Must be called before use.
|
|
*/
|
|
void
|
|
cv_init(struct cv *cvp, const char *desc)
|
|
{
|
|
|
|
TAILQ_INIT(&cvp->cv_waitq);
|
|
cvp->cv_mtx = NULL;
|
|
cvp->cv_description = desc;
|
|
}
|
|
|
|
/*
|
|
* Destroy a condition variable. The condition variable must be re-initialized
|
|
* in order to be re-used.
|
|
*/
|
|
void
|
|
cv_destroy(struct cv *cvp)
|
|
{
|
|
|
|
KASSERT(cv_waitq_empty(cvp), ("%s: cv_waitq non-empty", __func__));
|
|
}
|
|
|
|
/*
|
|
* Common code for cv_wait* functions. All require sched_lock.
|
|
*/
|
|
|
|
/*
|
|
* Switch context.
|
|
*/
|
|
static __inline void
|
|
cv_switch(struct thread *td)
|
|
{
|
|
TD_SET_SLEEPING(td);
|
|
td->td_proc->p_stats->p_ru.ru_nvcsw++;
|
|
mi_switch();
|
|
CTR3(KTR_PROC, "cv_switch: resume thread %p (pid %d, %s)", td,
|
|
td->td_proc->p_pid, td->td_proc->p_comm);
|
|
}
|
|
|
|
/*
|
|
* Switch context, catching signals.
|
|
*/
|
|
static __inline int
|
|
cv_switch_catch(struct thread *td)
|
|
{
|
|
struct proc *p;
|
|
int sig;
|
|
|
|
/*
|
|
* We put ourselves on the sleep queue and start our timeout before
|
|
* calling cursig, as we could stop there, and a wakeup or a SIGCONT (or
|
|
* both) could occur while we were stopped. A SIGCONT would cause us to
|
|
* be marked as TDS_SLP without resuming us, thus we must be ready for
|
|
* sleep when cursig is called. If the wakeup happens while we're
|
|
* stopped, td->td_wchan will be 0 upon return from cursig,
|
|
* and TD_ON_SLEEPQ() will return false.
|
|
*/
|
|
td->td_flags |= TDF_SINTR;
|
|
mtx_unlock_spin(&sched_lock);
|
|
p = td->td_proc;
|
|
PROC_LOCK(p);
|
|
mtx_lock(&p->p_sigacts->ps_mtx);
|
|
sig = cursig(td);
|
|
mtx_unlock(&p->p_sigacts->ps_mtx);
|
|
if (thread_suspend_check(1))
|
|
sig = SIGSTOP;
|
|
mtx_lock_spin(&sched_lock);
|
|
PROC_UNLOCK(p);
|
|
if (sig != 0) {
|
|
if (TD_ON_SLEEPQ(td))
|
|
cv_waitq_remove(td);
|
|
TD_SET_RUNNING(td);
|
|
} else if (TD_ON_SLEEPQ(td)) {
|
|
cv_switch(td);
|
|
}
|
|
td->td_flags &= ~TDF_SINTR;
|
|
|
|
return sig;
|
|
}
|
|
|
|
/*
|
|
* Add a thread to the wait queue of a condition variable.
|
|
*/
|
|
static __inline void
|
|
cv_waitq_add(struct cv *cvp, struct thread *td)
|
|
{
|
|
|
|
td->td_flags |= TDF_CVWAITQ;
|
|
TD_SET_ON_SLEEPQ(td);
|
|
td->td_wchan = cvp;
|
|
td->td_wmesg = cvp->cv_description;
|
|
CTR3(KTR_PROC, "cv_waitq_add: thread %p (pid %d, %s)", td,
|
|
td->td_proc->p_pid, td->td_proc->p_comm);
|
|
TAILQ_INSERT_TAIL(&cvp->cv_waitq, td, td_slpq);
|
|
sched_sleep(td, td->td_priority);
|
|
}
|
|
|
|
/*
|
|
* Wait on a condition variable. The current thread is placed on the condition
|
|
* variable's wait queue and suspended. A cv_signal or cv_broadcast on the same
|
|
* condition variable will resume the thread. The mutex is released before
|
|
* sleeping and will be held on return. It is recommended that the mutex be
|
|
* held when cv_signal or cv_broadcast are called.
|
|
*/
|
|
void
|
|
cv_wait(struct cv *cvp, struct mtx *mp)
|
|
{
|
|
struct thread *td;
|
|
WITNESS_SAVE_DECL(mp);
|
|
|
|
td = curthread;
|
|
#ifdef KTRACE
|
|
if (KTRPOINT(td, KTR_CSW))
|
|
ktrcsw(1, 0);
|
|
#endif
|
|
CV_ASSERT(cvp, mp, td);
|
|
WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, &mp->mtx_object,
|
|
"Waiting on \"%s\"", cvp->cv_description);
|
|
WITNESS_SAVE(&mp->mtx_object, mp);
|
|
|
|
if (cold ) {
|
|
/*
|
|
* During autoconfiguration, just give interrupts
|
|
* a chance, then just return. Don't run any other
|
|
* thread or panic below, in case this is the idle
|
|
* process and already asleep.
|
|
*/
|
|
return;
|
|
}
|
|
|
|
mtx_lock_spin(&sched_lock);
|
|
|
|
CV_WAIT_VALIDATE(cvp, mp);
|
|
|
|
DROP_GIANT();
|
|
mtx_unlock(mp);
|
|
|
|
cv_waitq_add(cvp, td);
|
|
cv_switch(td);
|
|
|
|
mtx_unlock_spin(&sched_lock);
|
|
#ifdef KTRACE
|
|
if (KTRPOINT(td, KTR_CSW))
|
|
ktrcsw(0, 0);
|
|
#endif
|
|
PICKUP_GIANT();
|
|
mtx_lock(mp);
|
|
WITNESS_RESTORE(&mp->mtx_object, mp);
|
|
}
|
|
|
|
/*
|
|
* Wait on a condition variable, allowing interruption by signals. Return 0 if
|
|
* the thread was resumed with cv_signal or cv_broadcast, EINTR or ERESTART if
|
|
* a signal was caught. If ERESTART is returned the system call should be
|
|
* restarted if possible.
|
|
*/
|
|
int
|
|
cv_wait_sig(struct cv *cvp, struct mtx *mp)
|
|
{
|
|
struct thread *td;
|
|
struct proc *p;
|
|
int rval;
|
|
int sig;
|
|
WITNESS_SAVE_DECL(mp);
|
|
|
|
td = curthread;
|
|
p = td->td_proc;
|
|
rval = 0;
|
|
#ifdef KTRACE
|
|
if (KTRPOINT(td, KTR_CSW))
|
|
ktrcsw(1, 0);
|
|
#endif
|
|
CV_ASSERT(cvp, mp, td);
|
|
WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, &mp->mtx_object,
|
|
"Waiting on \"%s\"", cvp->cv_description);
|
|
WITNESS_SAVE(&mp->mtx_object, mp);
|
|
|
|
if (cold || panicstr) {
|
|
/*
|
|
* After a panic, or during autoconfiguration, just give
|
|
* interrupts a chance, then just return; don't run any other
|
|
* procs or panic below, in case this is the idle process and
|
|
* already asleep.
|
|
*/
|
|
return 0;
|
|
}
|
|
|
|
mtx_lock_spin(&sched_lock);
|
|
|
|
CV_WAIT_VALIDATE(cvp, mp);
|
|
|
|
DROP_GIANT();
|
|
mtx_unlock(mp);
|
|
|
|
cv_waitq_add(cvp, td);
|
|
sig = cv_switch_catch(td);
|
|
|
|
mtx_unlock_spin(&sched_lock);
|
|
|
|
PROC_LOCK(p);
|
|
mtx_lock(&p->p_sigacts->ps_mtx);
|
|
if (sig == 0)
|
|
sig = cursig(td); /* XXXKSE */
|
|
if (sig != 0) {
|
|
if (SIGISMEMBER(p->p_sigacts->ps_sigintr, sig))
|
|
rval = EINTR;
|
|
else
|
|
rval = ERESTART;
|
|
}
|
|
mtx_unlock(&p->p_sigacts->ps_mtx);
|
|
if (p->p_flag & P_WEXIT)
|
|
rval = EINTR;
|
|
PROC_UNLOCK(p);
|
|
|
|
#ifdef KTRACE
|
|
if (KTRPOINT(td, KTR_CSW))
|
|
ktrcsw(0, 0);
|
|
#endif
|
|
PICKUP_GIANT();
|
|
mtx_lock(mp);
|
|
WITNESS_RESTORE(&mp->mtx_object, mp);
|
|
|
|
return (rval);
|
|
}
|
|
|
|
/*
|
|
* Wait on a condition variable for at most timo/hz seconds. Returns 0 if the
|
|
* process was resumed by cv_signal or cv_broadcast, EWOULDBLOCK if the timeout
|
|
* expires.
|
|
*/
|
|
int
|
|
cv_timedwait(struct cv *cvp, struct mtx *mp, int timo)
|
|
{
|
|
struct thread *td;
|
|
int rval;
|
|
WITNESS_SAVE_DECL(mp);
|
|
|
|
td = curthread;
|
|
rval = 0;
|
|
#ifdef KTRACE
|
|
if (KTRPOINT(td, KTR_CSW))
|
|
ktrcsw(1, 0);
|
|
#endif
|
|
CV_ASSERT(cvp, mp, td);
|
|
WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, &mp->mtx_object,
|
|
"Waiting on \"%s\"", cvp->cv_description);
|
|
WITNESS_SAVE(&mp->mtx_object, mp);
|
|
|
|
if (cold || panicstr) {
|
|
/*
|
|
* After a panic, or during autoconfiguration, just give
|
|
* interrupts a chance, then just return; don't run any other
|
|
* thread or panic below, in case this is the idle process and
|
|
* already asleep.
|
|
*/
|
|
return 0;
|
|
}
|
|
|
|
mtx_lock_spin(&sched_lock);
|
|
|
|
CV_WAIT_VALIDATE(cvp, mp);
|
|
|
|
DROP_GIANT();
|
|
mtx_unlock(mp);
|
|
|
|
cv_waitq_add(cvp, td);
|
|
callout_reset(&td->td_slpcallout, timo, cv_timedwait_end, td);
|
|
cv_switch(td);
|
|
|
|
if (td->td_flags & TDF_TIMEOUT) {
|
|
td->td_flags &= ~TDF_TIMEOUT;
|
|
rval = EWOULDBLOCK;
|
|
} else if (td->td_flags & TDF_TIMOFAIL)
|
|
td->td_flags &= ~TDF_TIMOFAIL;
|
|
else if (callout_stop(&td->td_slpcallout) == 0) {
|
|
/*
|
|
* Work around race with cv_timedwait_end similar to that
|
|
* between msleep and endtsleep.
|
|
* Go back to sleep.
|
|
*/
|
|
TD_SET_SLEEPING(td);
|
|
td->td_proc->p_stats->p_ru.ru_nivcsw++;
|
|
mi_switch();
|
|
td->td_flags &= ~TDF_TIMOFAIL;
|
|
}
|
|
|
|
mtx_unlock_spin(&sched_lock);
|
|
#ifdef KTRACE
|
|
if (KTRPOINT(td, KTR_CSW))
|
|
ktrcsw(0, 0);
|
|
#endif
|
|
PICKUP_GIANT();
|
|
mtx_lock(mp);
|
|
WITNESS_RESTORE(&mp->mtx_object, mp);
|
|
|
|
return (rval);
|
|
}
|
|
|
|
/*
|
|
* Wait on a condition variable for at most timo/hz seconds, allowing
|
|
* interruption by signals. Returns 0 if the thread was resumed by cv_signal
|
|
* or cv_broadcast, EWOULDBLOCK if the timeout expires, and EINTR or ERESTART if
|
|
* a signal was caught.
|
|
*/
|
|
int
|
|
cv_timedwait_sig(struct cv *cvp, struct mtx *mp, int timo)
|
|
{
|
|
struct thread *td;
|
|
struct proc *p;
|
|
int rval;
|
|
int sig;
|
|
WITNESS_SAVE_DECL(mp);
|
|
|
|
td = curthread;
|
|
p = td->td_proc;
|
|
rval = 0;
|
|
#ifdef KTRACE
|
|
if (KTRPOINT(td, KTR_CSW))
|
|
ktrcsw(1, 0);
|
|
#endif
|
|
CV_ASSERT(cvp, mp, td);
|
|
WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, &mp->mtx_object,
|
|
"Waiting on \"%s\"", cvp->cv_description);
|
|
WITNESS_SAVE(&mp->mtx_object, mp);
|
|
|
|
if (cold || panicstr) {
|
|
/*
|
|
* After a panic, or during autoconfiguration, just give
|
|
* interrupts a chance, then just return; don't run any other
|
|
* thread or panic below, in case this is the idle process and
|
|
* already asleep.
|
|
*/
|
|
return 0;
|
|
}
|
|
|
|
mtx_lock_spin(&sched_lock);
|
|
|
|
CV_WAIT_VALIDATE(cvp, mp);
|
|
|
|
DROP_GIANT();
|
|
mtx_unlock(mp);
|
|
|
|
cv_waitq_add(cvp, td);
|
|
callout_reset(&td->td_slpcallout, timo, cv_timedwait_end, td);
|
|
sig = cv_switch_catch(td);
|
|
|
|
if (td->td_flags & TDF_TIMEOUT) {
|
|
td->td_flags &= ~TDF_TIMEOUT;
|
|
rval = EWOULDBLOCK;
|
|
} else if (td->td_flags & TDF_TIMOFAIL)
|
|
td->td_flags &= ~TDF_TIMOFAIL;
|
|
else if (callout_stop(&td->td_slpcallout) == 0) {
|
|
/*
|
|
* Work around race with cv_timedwait_end similar to that
|
|
* between msleep and endtsleep.
|
|
* Go back to sleep.
|
|
*/
|
|
TD_SET_SLEEPING(td);
|
|
td->td_proc->p_stats->p_ru.ru_nivcsw++;
|
|
mi_switch();
|
|
td->td_flags &= ~TDF_TIMOFAIL;
|
|
}
|
|
mtx_unlock_spin(&sched_lock);
|
|
|
|
PROC_LOCK(p);
|
|
mtx_lock(&p->p_sigacts->ps_mtx);
|
|
if (sig == 0)
|
|
sig = cursig(td);
|
|
if (sig != 0) {
|
|
if (SIGISMEMBER(p->p_sigacts->ps_sigintr, sig))
|
|
rval = EINTR;
|
|
else
|
|
rval = ERESTART;
|
|
}
|
|
mtx_unlock(&p->p_sigacts->ps_mtx);
|
|
if (p->p_flag & P_WEXIT)
|
|
rval = EINTR;
|
|
PROC_UNLOCK(p);
|
|
|
|
#ifdef KTRACE
|
|
if (KTRPOINT(td, KTR_CSW))
|
|
ktrcsw(0, 0);
|
|
#endif
|
|
PICKUP_GIANT();
|
|
mtx_lock(mp);
|
|
WITNESS_RESTORE(&mp->mtx_object, mp);
|
|
|
|
return (rval);
|
|
}
|
|
|
|
/*
|
|
* Common code for signal and broadcast. Assumes waitq is not empty. Must be
|
|
* called with sched_lock held.
|
|
*/
|
|
static __inline void
|
|
cv_wakeup(struct cv *cvp)
|
|
{
|
|
struct thread *td;
|
|
|
|
mtx_assert(&sched_lock, MA_OWNED);
|
|
td = TAILQ_FIRST(&cvp->cv_waitq);
|
|
KASSERT(td->td_wchan == cvp, ("%s: bogus wchan", __func__));
|
|
KASSERT(td->td_flags & TDF_CVWAITQ, ("%s: not on waitq", __func__));
|
|
cv_waitq_remove(td);
|
|
TD_CLR_SLEEPING(td);
|
|
setrunnable(td);
|
|
}
|
|
|
|
/*
|
|
* Signal a condition variable, wakes up one waiting thread. Will also wakeup
|
|
* the swapper if the process is not in memory, so that it can bring the
|
|
* sleeping process in. Note that this may also result in additional threads
|
|
* being made runnable. Should be called with the same mutex as was passed to
|
|
* cv_wait held.
|
|
*/
|
|
void
|
|
cv_signal(struct cv *cvp)
|
|
{
|
|
|
|
KASSERT(cvp != NULL, ("%s: cvp NULL", __func__));
|
|
mtx_lock_spin(&sched_lock);
|
|
if (!TAILQ_EMPTY(&cvp->cv_waitq)) {
|
|
CV_SIGNAL_VALIDATE(cvp);
|
|
cv_wakeup(cvp);
|
|
}
|
|
mtx_unlock_spin(&sched_lock);
|
|
}
|
|
|
|
/*
|
|
* Broadcast a signal to a condition variable. Wakes up all waiting threads.
|
|
* Should be called with the same mutex as was passed to cv_wait held.
|
|
*/
|
|
void
|
|
cv_broadcast(struct cv *cvp)
|
|
{
|
|
|
|
KASSERT(cvp != NULL, ("%s: cvp NULL", __func__));
|
|
mtx_lock_spin(&sched_lock);
|
|
CV_SIGNAL_VALIDATE(cvp);
|
|
while (!TAILQ_EMPTY(&cvp->cv_waitq))
|
|
cv_wakeup(cvp);
|
|
mtx_unlock_spin(&sched_lock);
|
|
}
|
|
|
|
/*
|
|
* Remove a thread from the wait queue of its condition variable. This may be
|
|
* called externally.
|
|
*/
|
|
void
|
|
cv_waitq_remove(struct thread *td)
|
|
{
|
|
struct cv *cvp;
|
|
|
|
mtx_assert(&sched_lock, MA_OWNED);
|
|
if ((cvp = td->td_wchan) != NULL && td->td_flags & TDF_CVWAITQ) {
|
|
TAILQ_REMOVE(&cvp->cv_waitq, td, td_slpq);
|
|
td->td_flags &= ~TDF_CVWAITQ;
|
|
td->td_wmesg = NULL;
|
|
TD_CLR_ON_SLEEPQ(td);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Timeout function for cv_timedwait. Put the thread on the runqueue and set
|
|
* its timeout flag.
|
|
*/
|
|
static void
|
|
cv_timedwait_end(void *arg)
|
|
{
|
|
struct thread *td;
|
|
|
|
td = arg;
|
|
CTR3(KTR_PROC, "cv_timedwait_end: thread %p (pid %d, %s)",
|
|
td, td->td_proc->p_pid, td->td_proc->p_comm);
|
|
mtx_lock_spin(&sched_lock);
|
|
if (TD_ON_SLEEPQ(td)) {
|
|
cv_waitq_remove(td);
|
|
td->td_flags |= TDF_TIMEOUT;
|
|
} else {
|
|
td->td_flags |= TDF_TIMOFAIL;
|
|
}
|
|
TD_CLR_SLEEPING(td);
|
|
setrunnable(td);
|
|
mtx_unlock_spin(&sched_lock);
|
|
}
|
|
|
|
/*
|
|
* For now only abort interruptable waits.
|
|
* The others will have to either complete on their own or have a timeout.
|
|
*/
|
|
void
|
|
cv_abort(struct thread *td)
|
|
{
|
|
|
|
CTR3(KTR_PROC, "cv_abort: thread %p (pid %d, %s)", td,
|
|
td->td_proc->p_pid, td->td_proc->p_comm);
|
|
mtx_lock_spin(&sched_lock);
|
|
if ((td->td_flags & (TDF_SINTR|TDF_TIMEOUT)) == TDF_SINTR) {
|
|
if (TD_ON_SLEEPQ(td)) {
|
|
cv_waitq_remove(td);
|
|
}
|
|
TD_CLR_SLEEPING(td);
|
|
setrunnable(td);
|
|
}
|
|
mtx_unlock_spin(&sched_lock);
|
|
}
|
|
|