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 */ 26 27 #include <mdb/mdb_modapi.h> 28 #include <sys/types.h> 29 #include <sys/stream.h> 30 #include <sys/strlog.h> 31 32 int 33 msgbuf(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 34 { 35 queue_t q; 36 uintptr_t qp; 37 mblk_t next; 38 mblk_t cont; 39 log_ctl_t lctl; 40 char line[1024]; 41 uint_t verbose = FALSE; 42 43 if (!(flags & DCMD_ADDRSPEC)) { 44 if (mdb_readsym(&qp, sizeof (qp), "log_recentq") == -1) { 45 mdb_warn("failed to read log_recent"); 46 return (DCMD_ERR); 47 } 48 49 if (mdb_vread(&q, sizeof (q), qp) == -1) { 50 mdb_warn("failed to read queue_t at %p", qp); 51 return (DCMD_ERR); 52 } 53 54 if (mdb_pwalk_dcmd("b_next", "msgbuf", argc, argv, 55 (uintptr_t)q.q_first) == -1) { 56 mdb_warn("can't walk 'b_next'"); 57 return (DCMD_ERR); 58 } 59 return (DCMD_OK); 60 } 61 62 if (mdb_getopts(argc, argv, 63 'v', MDB_OPT_SETBITS, TRUE, &verbose, NULL) != argc) 64 return (DCMD_USAGE); 65 66 if (DCMD_HDRSPEC(flags)) { 67 if (verbose) 68 mdb_printf("%<u>%20s %?s %-40s%</u>\n", 69 "TIMESTAMP", "LOGCTL", "MESSAGE"); 70 else 71 mdb_printf("%<u>%-70s%</u>\n", "MESSAGE"); 72 } 73 74 if (mdb_vread(&next, sizeof (next), addr) == -1) { 75 mdb_warn("failed to read msgb structure at %p", addr); 76 return (DCMD_ERR); 77 } 78 79 if (mdb_vread(&lctl, sizeof (lctl), (uintptr_t)next.b_rptr) == -1) { 80 mdb_warn("failed to read log_ctl_t at %p", next.b_rptr); 81 return (DCMD_ERR); 82 } 83 84 if (mdb_vread(&cont, sizeof (cont), (uintptr_t)next.b_cont) == -1) { 85 mdb_warn("failed to read msgb structure at %p", next.b_cont); 86 return (DCMD_ERR); 87 } 88 89 if (mdb_readstr(line, sizeof (line), (uintptr_t)cont.b_rptr) == -1) { 90 mdb_warn("failed to read string at %p", cont.b_rptr); 91 return (DCMD_ERR); 92 } 93 94 if (verbose) 95 mdb_printf("%Y %?p ", lctl.ttime, next.b_rptr); 96 97 /* skip leading CR to avoid extra lines */ 98 if (line[0] == 0x0d) 99 mdb_printf("%s", &line[1]); 100 else 101 mdb_printf("%s", &line[0]); 102 103 return (DCMD_OK); 104 } 105