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 2004 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 * Copyright 2023 RackTop Systems, Inc.
26 */
27
28 #include <mdb/mdb_modapi.h>
29 #include <sys/types.h>
30 #include <sys/stream.h>
31 #include <sys/strlog.h>
32
33 int
msgbuf(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)34 msgbuf(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
35 {
36 queue_t q;
37 uintptr_t qp;
38 mblk_t next;
39 mblk_t cont;
40 log_ctl_t lctl;
41 char line[1024];
42 uint_t verbose = FALSE;
43 uint_t delta = FALSE;
44 uint_t abstime = FALSE;
45
46 if (!(flags & DCMD_ADDRSPEC)) {
47 if (mdb_readsym(&qp, sizeof (qp), "log_recentq") == -1) {
48 mdb_warn("failed to read log_recent");
49 return (DCMD_ERR);
50 }
51
52 if (mdb_vread(&q, sizeof (q), qp) == -1) {
53 mdb_warn("failed to read queue_t at %p", qp);
54 return (DCMD_ERR);
55 }
56
57 if (mdb_pwalk_dcmd("b_next", "msgbuf", argc, argv,
58 (uintptr_t)q.q_first) == -1) {
59 mdb_warn("can't walk 'b_next'");
60 return (DCMD_ERR);
61 }
62 return (DCMD_OK);
63 }
64
65 if (mdb_getopts(argc, argv,
66 't', MDB_OPT_SETBITS, TRUE, &delta,
67 'T', MDB_OPT_SETBITS, TRUE, &abstime,
68 'v', MDB_OPT_SETBITS, TRUE, &verbose, NULL) != argc)
69 return (DCMD_USAGE);
70
71 /* For backwards compatability, -v implies -T */
72 if (verbose)
73 abstime = TRUE;
74
75 if (DCMD_HDRSPEC(flags)) {
76 int amt = 80;
77
78 mdb_printf("%<u>");
79 if (abstime) {
80 mdb_printf("%-20s ", "TIMESTAMP");
81 amt -= 21;
82 }
83 if (delta) {
84 mdb_printf("%-20s ", "DELTA");
85 amt -= 21;
86 }
87 if (verbose) {
88 mdb_printf("%?s ", "LOGCTL");
89 amt -= 17;
90 }
91 mdb_printf("%-*s%</u>\n", amt, "MESSAGE");
92 }
93
94 if (mdb_vread(&next, sizeof (next), addr) == -1) {
95 mdb_warn("failed to read msgb structure at %p", addr);
96 return (DCMD_ERR);
97 }
98
99 if (mdb_vread(&lctl, sizeof (lctl), (uintptr_t)next.b_rptr) == -1) {
100 mdb_warn("failed to read log_ctl_t at %p", next.b_rptr);
101 return (DCMD_ERR);
102 }
103
104 if (mdb_vread(&cont, sizeof (cont), (uintptr_t)next.b_cont) == -1) {
105 mdb_warn("failed to read msgb structure at %p", next.b_cont);
106 return (DCMD_ERR);
107 }
108
109 if (mdb_readstr(line, sizeof (line), (uintptr_t)cont.b_rptr) == -1) {
110 mdb_warn("failed to read string at %p", cont.b_rptr);
111 return (DCMD_ERR);
112 }
113
114 if (abstime)
115 mdb_printf("%Y ", lctl.ttime);
116
117 if (delta) {
118 timestruc_t hr_time;
119 int64_t diff;
120 char buf[32] = { 0 };
121
122 if (mdb_readvar(&hr_time, "panic_hrestime") == -1) {
123 mdb_warn("failed to read panic_hrestime");
124 return (DCMD_ERR);
125 }
126
127 if (hr_time.tv_sec == 0 &&
128 mdb_readvar(&hr_time, "hrestime") == -1) {
129 mdb_warn("failed to read hrestime");
130 return (DCMD_ERR);
131 }
132
133 diff = (int64_t)lctl.ttime - hr_time.tv_sec;
134 mdb_nicetime(SEC2NSEC(diff), buf, sizeof (buf));
135 mdb_printf("%-20s ", buf);
136 }
137
138 if (verbose)
139 mdb_printf("%?p ", next.b_rptr);
140
141 /* skip leading CR to avoid extra lines */
142 if (line[0] == 0x0d)
143 mdb_printf("%s", &line[1]);
144 else
145 mdb_printf("%s", &line[0]);
146
147 return (DCMD_OK);
148 }
149
150 void
msgbuf_help(void)151 msgbuf_help(void)
152 {
153 mdb_printf("Print the most recent console messages.\n\n"
154 "%<b>OPTIONS%</b>\n"
155 "\t-t\tInclude the age of the message from now.\n"
156 "\t-T\tInclude the date/time of the message.\n"
157 "\t-v\tInclude the date/time of the message as well as the address "
158 "of its log_ctl_t.\n");
159 }
160