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
tnf_trace_on(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
tnf_trace_off(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
tnf_trace_init(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