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 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 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