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more debug info

This commit is contained in:
christos 2017-09-16 23:55:16 +00:00
parent 798c80a099
commit c483c7cba9
1 changed files with 21 additions and 13 deletions
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34
sys/kern/kern_event.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: kern_event.c,v 1.93 2017/07/03 00:53:33 riastradh Exp $ */
/* $NetBSD: kern_event.c,v 1.94 2017/09/16 23:55:16 christos Exp $ */
/*-
* Copyright (c) 2008, 2009 The NetBSD Foundation, Inc.
@ -58,7 +58,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: kern_event.c,v 1.93 2017/07/03 00:53:33 riastradh Exp $");
__KERNEL_RCSID(0, "$NetBSD: kern_event.c,v 1.94 2017/09/16 23:55:16 christos Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@ -1089,12 +1089,16 @@ kqueue_register(struct kqueue *kq, struct kevent *kev)
}
#if defined(DEBUG)
#define KN_FMT(buf, kn) \
(snprintb((buf), sizeof(buf), __KN_FLAG_BITS, (kn)->kn_status), buf)
static void
kq_check(struct kqueue *kq)
kqueue_check(const char *func, size_t line, const struct kqueue *kq)
{
const struct knote *kn;
int count;
int nmarker;
char buf[128];
KASSERT(mutex_owned(&kq->kq_lock));
KASSERT(kq->kq_count >= 0);
@ -1103,16 +1107,18 @@ kq_check(struct kqueue *kq)
nmarker = 0;
TAILQ_FOREACH(kn, &kq->kq_head, kn_tqe) {
if ((kn->kn_status & (KN_MARKER | KN_QUEUED)) == 0) {
panic("%s: kq=%p kn=%p inconsist 1", __func__, kq, kn);
panic("%s,%zu: kq=%p kn=%p !(MARKER|QUEUED) %s",
func, line, kq, kn, KN_FMT(buf, kn));
}
if ((kn->kn_status & KN_MARKER) == 0) {
if (kn->kn_kq != kq) {
panic("%s: kq=%p kn=%p inconsist 2",
__func__, kq, kn);
panic("%s,%zu: kq=%p kn(%p) != kn->kq(%p): %s",
func, line, kq, kn, kn->kn_kq,
KN_FMT(buf, kn));
}
if ((kn->kn_status & KN_ACTIVE) == 0) {
panic("%s: kq=%p kn=%p: not active",
__func__, kq, kn);
panic("%s,%zu: kq=%p kn=%p: !ACTIVE %s",
func, line, kq, kn, KN_FMT(buf, kn));
}
count++;
if (count > kq->kq_count) {
@ -1122,19 +1128,21 @@ kq_check(struct kqueue *kq)
nmarker++;
#if 0
if (nmarker > 10000) {
panic("%s: kq=%p too many markers: %d != %d, "
"nmarker=%d",
__func__, kq, kq->kq_count, count, nmarker);
panic("%s,%zu: kq=%p too many markers: "
"%d != %d, nmarker=%d",
func, line, kq, kq->kq_count, count,
nmarker);
}
#endif
}
}
if (kq->kq_count != count) {
bad:
panic("%s: kq=%p inconsist 3: %d != %d, nmarker=%d",
__func__, kq, kq->kq_count, count, nmarker);
panic("%s,%zu: kq=%p kq->kq_count(%d) != count(%d), nmarker=%d",
func, line, kq, kq->kq_count, count, nmarker);
}
}
#define kq_check(a) kqueue_check(__func__, __LINE__, (a))
#else /* defined(DEBUG) */
#define kq_check(a) /* nothing */
#endif /* defined(DEBUG) */