1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 1997-2003 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #include <sys/types.h> 28 #include <sys/inttypes.h> 29 #include <sys/time.h> 30 #include <sys/thread.h> 31 #include <sys/cpuvar.h> 32 #include <sys/cyclic.h> 33 #include <sys/lockstat.h> 34 #include <sys/spl.h> 35 36 /* 37 * Resident support for the lockstat driver. 38 */ 39 40 dtrace_id_t lockstat_probemap[LS_NPROBES]; 41 void (*lockstat_probe)(dtrace_id_t, uintptr_t, uintptr_t, 42 uintptr_t, uintptr_t, uintptr_t); 43 44 int 45 lockstat_active_threads(void) 46 { 47 kthread_t *tp; 48 int active = 0; 49 50 mutex_enter(&pidlock); 51 tp = curthread; 52 do { 53 if (tp->t_lockstat) 54 active++; 55 } while ((tp = tp->t_next) != curthread); 56 mutex_exit(&pidlock); 57 return (active); 58 } 59