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 (c) 2000-2001 by Sun Microsystems, Inc. 24 * All rights reserved. 25 */ 26 /* 27 * Copyright (c) 2012 by Delphix. All rights reserved. 28 */ 29 30 #include <sys/thread.h> 31 #include "tsd.h" 32 33 /* 34 * Initialize the tsd walker by either using the given starting address, 35 * or reading the value of the kernel's tsd_list pointer. 36 */ 37 int 38 tsd_walk_init(mdb_walk_state_t *wsp) 39 { 40 if (wsp->walk_addr == 0 && 41 mdb_readvar(&wsp->walk_addr, "tsd_list") == -1) { 42 mdb_warn("failed to read 'tsd_list'"); 43 return (WALK_ERR); 44 } 45 46 wsp->walk_data = mdb_alloc(sizeof (struct tsd_thread), UM_SLEEP); 47 return (WALK_NEXT); 48 } 49 50 int 51 tsd_walk_step(mdb_walk_state_t *wsp) 52 { 53 int status; 54 55 if (wsp->walk_addr == 0) 56 return (WALK_DONE); 57 58 if (mdb_vread(wsp->walk_data, 59 sizeof (struct tsd_thread), wsp->walk_addr) == -1) { 60 mdb_warn("failed to read tsd at %p", wsp->walk_addr); 61 return (WALK_ERR); 62 } 63 64 status = wsp->walk_callback(wsp->walk_addr, wsp->walk_data, 65 wsp->walk_cbdata); 66 67 wsp->walk_addr = 68 (uintptr_t)(((struct tsd_thread *)wsp->walk_data)->ts_next); 69 return (status); 70 } 71 72 void 73 tsd_walk_fini(mdb_walk_state_t *wsp) 74 { 75 mdb_free(wsp->walk_data, sizeof (struct tsd_thread)); 76 } 77 78 /* 79 * Map from thread pointer to tsd pointer for given key 80 */ 81 int 82 ttotsd(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 83 { 84 kthread_t thread, *t = &thread; 85 struct tsd_thread tsdata, *ts = &tsdata; 86 uintptr_t key = 0; 87 uintptr_t eladdr; 88 void *element = NULL; 89 90 if (mdb_getopts(argc, argv, 'k', MDB_OPT_UINTPTR, &key, NULL) != argc) 91 return (DCMD_USAGE); 92 93 if (!(flags & DCMD_ADDRSPEC) || key == 0) 94 return (DCMD_USAGE); 95 96 if (mdb_vread(t, sizeof (*t), addr) == -1) { 97 mdb_warn("failed to read thread at %p", addr); 98 return (DCMD_ERR); 99 } 100 101 if (t->t_tsd == NULL) 102 goto out; 103 104 if (mdb_vread(ts, sizeof (*ts), (uintptr_t)t->t_tsd) == -1) { 105 mdb_warn("failed to read tsd at %p", t->t_tsd); 106 return (DCMD_ERR); 107 } 108 109 if (key > ts->ts_nkeys) 110 goto out; 111 112 eladdr = (uintptr_t)(ts->ts_value + key - 1); 113 if (mdb_vread(&element, sizeof (element), eladdr) == -1) { 114 mdb_warn("failed to read t->t_tsd[%d] at %p", key - 1, eladdr); 115 return (DCMD_ERR); 116 } 117 118 out: 119 if (element == NULL && (flags & DCMD_PIPE)) 120 return (DCMD_OK); 121 122 mdb_printf("%p\n", element); 123 return (DCMD_OK); 124 } 125 126 static int 127 tsdthr_match(uintptr_t addr, const kthread_t *t, uintptr_t tsdaddr) 128 { 129 /* 130 * Allow for multiple matches, even though that "can't happen." 131 */ 132 if (tsdaddr == (uintptr_t)t->t_tsd) 133 mdb_printf("%p\n", addr); 134 return (WALK_NEXT); 135 } 136 137 /* 138 * Given a tsd pointer, find the owning thread 139 */ 140 /*ARGSUSED*/ 141 int 142 tsdtot(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 143 { 144 if (addr == 0 || argc != 0) 145 return (DCMD_USAGE); 146 if (mdb_walk("thread", (mdb_walk_cb_t)(uintptr_t)tsdthr_match, 147 (void *)addr) == -1) 148 return (DCMD_ERR); 149 return (DCMD_OK); 150 } 151