1*0Sstevel@tonic-gate /* 2*0Sstevel@tonic-gate * CDDL HEADER START 3*0Sstevel@tonic-gate * 4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*0Sstevel@tonic-gate * with the License. 8*0Sstevel@tonic-gate * 9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*0Sstevel@tonic-gate * See the License for the specific language governing permissions 12*0Sstevel@tonic-gate * and limitations under the License. 13*0Sstevel@tonic-gate * 14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*0Sstevel@tonic-gate * 20*0Sstevel@tonic-gate * CDDL HEADER END 21*0Sstevel@tonic-gate */ 22*0Sstevel@tonic-gate /* 23*0Sstevel@tonic-gate * Copyright 1994-2003 Sun Microsystems, Inc. All rights reserved. 24*0Sstevel@tonic-gate * Use is subject to license terms. 25*0Sstevel@tonic-gate */ 26*0Sstevel@tonic-gate 27*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 28*0Sstevel@tonic-gate 29*0Sstevel@tonic-gate /* 30*0Sstevel@tonic-gate * Includes 31*0Sstevel@tonic-gate */ 32*0Sstevel@tonic-gate 33*0Sstevel@tonic-gate #include <sys/types.h> 34*0Sstevel@tonic-gate #include <sys/param.h> 35*0Sstevel@tonic-gate #include <sys/debug.h> 36*0Sstevel@tonic-gate #include <sys/tnf.h> 37*0Sstevel@tonic-gate #include <sys/thread.h> 38*0Sstevel@tonic-gate #include <sys/dtrace.h> 39*0Sstevel@tonic-gate 40*0Sstevel@tonic-gate #include "tnf_buf.h" 41*0Sstevel@tonic-gate #include "tnf_types.h" 42*0Sstevel@tonic-gate #include "tnf_trace.h" 43*0Sstevel@tonic-gate 44*0Sstevel@tonic-gate #ifndef NPROBE 45*0Sstevel@tonic-gate 46*0Sstevel@tonic-gate /* 47*0Sstevel@tonic-gate * Globals 48*0Sstevel@tonic-gate */ 49*0Sstevel@tonic-gate 50*0Sstevel@tonic-gate size_t tnf_trace_file_size = TNF_TRACE_FILE_DEFAULT; 51*0Sstevel@tonic-gate 52*0Sstevel@tonic-gate /* 53*0Sstevel@tonic-gate * tnf_trace_on 54*0Sstevel@tonic-gate */ 55*0Sstevel@tonic-gate void 56*0Sstevel@tonic-gate tnf_trace_on(void) 57*0Sstevel@tonic-gate { 58*0Sstevel@tonic-gate TNFW_B_UNSET_STOPPED(tnfw_b_state); 59*0Sstevel@tonic-gate tnf_tracing_active = 1; 60*0Sstevel@tonic-gate dtrace_vtime_enable_tnf(); 61*0Sstevel@tonic-gate /* Enable system call tracing for all processes */ 62*0Sstevel@tonic-gate set_all_proc_sys(); 63*0Sstevel@tonic-gate } 64*0Sstevel@tonic-gate 65*0Sstevel@tonic-gate /* 66*0Sstevel@tonic-gate * tnf_trace_off 67*0Sstevel@tonic-gate */ 68*0Sstevel@tonic-gate void 69*0Sstevel@tonic-gate tnf_trace_off(void) 70*0Sstevel@tonic-gate { 71*0Sstevel@tonic-gate TNFW_B_SET_STOPPED(tnfw_b_state); 72*0Sstevel@tonic-gate dtrace_vtime_disable_tnf(); 73*0Sstevel@tonic-gate tnf_tracing_active = 0; 74*0Sstevel@tonic-gate /* System call tracing is automatically disabled */ 75*0Sstevel@tonic-gate } 76*0Sstevel@tonic-gate 77*0Sstevel@tonic-gate /* 78*0Sstevel@tonic-gate * tnf_trace_init 79*0Sstevel@tonic-gate * Not reentrant: only called from tnf_allocbuf(), which is 80*0Sstevel@tonic-gate * single-threaded. 81*0Sstevel@tonic-gate */ 82*0Sstevel@tonic-gate void 83*0Sstevel@tonic-gate tnf_trace_init(void) 84*0Sstevel@tonic-gate { 85*0Sstevel@tonic-gate int stopped; 86*0Sstevel@tonic-gate tnf_ops_t *ops; 87*0Sstevel@tonic-gate 88*0Sstevel@tonic-gate ASSERT(tnf_buf != NULL); 89*0Sstevel@tonic-gate ASSERT(!tnf_tracing_active); 90*0Sstevel@tonic-gate 91*0Sstevel@tonic-gate stopped = tnfw_b_state & TNFW_B_STOPPED; 92*0Sstevel@tonic-gate 93*0Sstevel@tonic-gate /* 94*0Sstevel@tonic-gate * Initialize the buffer 95*0Sstevel@tonic-gate */ 96*0Sstevel@tonic-gate tnfw_b_init_buffer(tnf_buf, tnf_trace_file_size); 97*0Sstevel@tonic-gate 98*0Sstevel@tonic-gate /* 99*0Sstevel@tonic-gate * Mark allocator running (not stopped). Luckily, 100*0Sstevel@tonic-gate * tnf_trace_alloc() first checks tnf_tracing_active, so no 101*0Sstevel@tonic-gate * trace data will be written. 102*0Sstevel@tonic-gate */ 103*0Sstevel@tonic-gate tnfw_b_state = TNFW_B_RUNNING; 104*0Sstevel@tonic-gate 105*0Sstevel@tonic-gate /* 106*0Sstevel@tonic-gate * 1195835: Write out some tags now. The stopped bit needs 107*0Sstevel@tonic-gate * to be clear while we do this. 108*0Sstevel@tonic-gate */ 109*0Sstevel@tonic-gate /* LINTED pointer cast may result in improper alignment */ 110*0Sstevel@tonic-gate if ((ops = (tnf_ops_t *)curthread->t_tnf_tpdp) != NULL) { 111*0Sstevel@tonic-gate tnf_tag_data_t *tag; 112*0Sstevel@tonic-gate TNFW_B_POS *pos; 113*0Sstevel@tonic-gate 114*0Sstevel@tonic-gate ASSERT(!LOCK_HELD(&ops->busy)); 115*0Sstevel@tonic-gate LOCK_INIT_HELD(&ops->busy); /* XXX save a call */ 116*0Sstevel@tonic-gate 117*0Sstevel@tonic-gate tag = TAG_DATA(tnf_struct_type); 118*0Sstevel@tonic-gate (void) tag->tag_desc(ops, tag); 119*0Sstevel@tonic-gate tag = TAG_DATA(tnf_probe_type); 120*0Sstevel@tonic-gate (void) tag->tag_desc(ops, tag); 121*0Sstevel@tonic-gate tag = TAG_DATA(tnf_kernel_schedule); 122*0Sstevel@tonic-gate (void) tag->tag_desc(ops, tag); 123*0Sstevel@tonic-gate 124*0Sstevel@tonic-gate pos = &ops->wcb.tnfw_w_tag_pos; 125*0Sstevel@tonic-gate TNFW_B_COMMIT(pos); 126*0Sstevel@tonic-gate pos = &ops->wcb.tnfw_w_pos; 127*0Sstevel@tonic-gate TNFW_B_ROLLBACK(pos); 128*0Sstevel@tonic-gate 129*0Sstevel@tonic-gate LOCK_INIT_CLEAR(&ops->busy); /* XXX save a call */ 130*0Sstevel@tonic-gate } 131*0Sstevel@tonic-gate 132*0Sstevel@tonic-gate /* Restore stopped bit */ 133*0Sstevel@tonic-gate tnfw_b_state |= stopped; 134*0Sstevel@tonic-gate } 135*0Sstevel@tonic-gate 136*0Sstevel@tonic-gate #endif /* NPROBE */ 137