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Print the shared lock(s) before we panic, to aid with debugging.

This commit is contained in:
christos 2014-11-24 02:36:31 +00:00
parent 43dbf6a651
commit a27531bc87
1 changed files with 11 additions and 4 deletions
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15
sys/kern/subr_lockdebug.c
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@ -1,4 +1,4 @@
/* $NetBSD: subr_lockdebug.c,v 1.51 2014/03/07 16:36:32 matt Exp $ */
/* $NetBSD: subr_lockdebug.c,v 1.52 2014/11/24 02:36:31 christos Exp $ */
/*-
* Copyright (c) 2006, 2007, 2008 The NetBSD Foundation, Inc.
@ -34,7 +34,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: subr_lockdebug.c,v 1.51 2014/03/07 16:36:32 matt Exp $");
__KERNEL_RCSID(0, "$NetBSD: subr_lockdebug.c,v 1.52 2014/11/24 02:36:31 christos Exp $");
#include "opt_ddb.h"
@ -101,6 +101,8 @@ static void lockdebug_abort1(lockdebug_t *, int, const char *,
const char *, bool);
static int lockdebug_more(int);
static void lockdebug_init(void);
static void lockdebug_dump(lockdebug_t *, void (*)(const char *, ...)
__printflike(1, 2));
static signed int
ld_rbto_compare_nodes(void *ctx, const void *n1, const void *n2)
@ -663,8 +665,13 @@ lockdebug_barrier(volatile void *spinlock, int slplocks)
}
splx(s);
if (l->l_shlocks != 0) {
panic("lockdebug_barrier: holding %d shared locks",
l->l_shlocks);
TAILQ_FOREACH(ld, &ld_all, ld_achain) {
if (ld->ld_lockops->lo_type == LOCKOPS_CV)
continue;
if (ld->ld_lwp == l)
lockdebug_dump(ld, printf);
}
panic("%s: holding %d shared locks", __func__, l->l_shlocks);
}
}