- Merge struct procsig with struct sigacts.

- 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)

1 files changed, 6 insertions, 0 deletions

diff --git a/sys/kern/kern_condvar.c b/sys/kern/kern_condvar.c
index 160434b..7852234 100644
--- a/sys/kern/kern_condvar.c
+++ b/sys/kern/kern_condvar.c
@@ -146,7 +146,9 @@ cv_switch_catch(struct thread *td)
 	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);
@@ -283,6 +285,7 @@ cv_wait_sig(struct cv *cvp, struct mtx *mp)
 	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) {
@@ -291,6 +294,7 @@ cv_wait_sig(struct cv *cvp, struct mtx *mp)
 		else
 			rval = ERESTART;
 	}
+	mtx_unlock(&p->p_sigacts->ps_mtx);
 	if (p->p_flag & P_WEXIT)
 		rval = EINTR;
 	PROC_UNLOCK(p);
@@ -446,6 +450,7 @@ cv_timedwait_sig(struct cv *cvp, struct mtx *mp, int timo)
 	mtx_unlock_spin(&sched_lock);
 
 	PROC_LOCK(p);
+	mtx_lock(&p->p_sigacts->ps_mtx);
 	if (sig == 0)
 		sig = cursig(td);
 	if (sig != 0) {
@@ -454,6 +459,7 @@ cv_timedwait_sig(struct cv *cvp, struct mtx *mp, int timo)
 		else
 			rval = ERESTART;
 	}
+	mtx_unlock(&p->p_sigacts->ps_mtx);
 	if (p->p_flag & P_WEXIT)
 		rval = EINTR;
 	PROC_UNLOCK(p);