lockstat_subr.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 1997-2003 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <sys/types.h>
#include <sys/inttypes.h>
#include <sys/time.h>
#include <sys/thread.h>
#include <sys/cpuvar.h>
#include <sys/cyclic.h>
#include <sys/lockstat.h>
#include <sys/spl.h>
/*
* Resident support for the lockstat driver.
*/
dtrace_id_t lockstat_probemap[LS_NPROBES];
void (*lockstat_probe)(dtrace_id_t, uintptr_t, uintptr_t,
uintptr_t, uintptr_t, uintptr_t);
int
lockstat_active_threads(void)
{
kthread_t *tp;
int active = 0;
mutex_enter(&pidlock);
tp = curthread;
do {
if (tp->t_lockstat)
active++;
} while ((tp = tp->t_next) != curthread);
mutex_exit(&pidlock);
return (active);
}