1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1995-1998 John Birrell <jb@cimlogic.com.au> 5 * Copyright (c) 2018 The FreeBSD Foundation 6 * All rights reserved. 7 * 8 * Portions of this software were developed by Konstantin Belousov 9 * under sponsorship from the FreeBSD Foundation. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the author nor the names of any co-contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include "namespace.h" 37 #include <sys/errno.h> 38 #include <stdlib.h> 39 #include <string.h> 40 #include <pthread.h> 41 #include <pthread_np.h> 42 #include "un-namespace.h" 43 44 #include "thr_private.h" 45 46 static void 47 thr_set_name_np(struct pthread *thread, char **tmp_name) 48 { 49 50 free(thread->name); 51 thread->name = *tmp_name; 52 *tmp_name = NULL; 53 } 54 55 /* Set the thread name. */ 56 __weak_reference(_pthread_setname_np, pthread_setname_np); 57 int 58 _pthread_setname_np(pthread_t thread, const char *name) 59 { 60 struct pthread *curthread; 61 char *tmp_name; 62 int res; 63 64 if (name != NULL) { 65 tmp_name = strdup(name); 66 if (tmp_name == NULL) 67 return (ENOMEM); 68 } else { 69 tmp_name = NULL; 70 } 71 curthread = _get_curthread(); 72 if (curthread == thread) { 73 res = 0; 74 THR_THREAD_LOCK(curthread, thread); 75 if (thr_set_name(thread->tid, name) == -1) 76 res = errno; 77 else 78 thr_set_name_np(thread, &tmp_name); 79 THR_THREAD_UNLOCK(curthread, thread); 80 } else { 81 res = ESRCH; 82 if (_thr_find_thread(curthread, thread, 0) == 0) { 83 if (thread->state != PS_DEAD) { 84 if (thr_set_name(thread->tid, name) == -1) { 85 res = errno; 86 } else { 87 thr_set_name_np(thread, &tmp_name); 88 res = 0; 89 } 90 } 91 THR_THREAD_UNLOCK(curthread, thread); 92 } 93 } 94 free(tmp_name); 95 return (res); 96 } 97 98 /* Set the thread name for debug. */ 99 __weak_reference(_pthread_set_name_np, pthread_set_name_np); 100 void 101 _pthread_set_name_np(pthread_t thread, const char *name) 102 { 103 (void)_pthread_setname_np(thread, name); 104 } 105 106 static void 107 thr_get_name_np(struct pthread *thread, char *buf, size_t len) 108 { 109 110 if (thread->name != NULL) 111 strlcpy(buf, thread->name, len); 112 else if (len > 0) 113 buf[0] = '\0'; 114 } 115 116 __weak_reference(_thr_getname_np, pthread_getname_np); 117 __weak_reference(_thr_getname_np, _pthread_getname_np); 118 int 119 _thr_getname_np(pthread_t thread, char *buf, size_t len) 120 { 121 struct pthread *curthread; 122 int res; 123 124 res = 0; 125 curthread = _get_curthread(); 126 if (curthread == thread) { 127 THR_THREAD_LOCK(curthread, thread); 128 thr_get_name_np(thread, buf, len); 129 THR_THREAD_UNLOCK(curthread, thread); 130 } else { 131 if (_thr_find_thread(curthread, thread, 0) == 0) { 132 if (thread->state != PS_DEAD) 133 thr_get_name_np(thread, buf, len); 134 else 135 res = ESRCH; 136 THR_THREAD_UNLOCK(curthread, thread); 137 } else { 138 res = ESRCH; 139 if (len > 0) 140 buf[0] = '\0'; 141 } 142 } 143 return (res); 144 } 145 146 __weak_reference(_pthread_get_name_np, pthread_get_name_np); 147 void 148 _pthread_get_name_np(pthread_t thread, char *buf, size_t len) 149 { 150 (void)_thr_getname_np(thread, buf, len); 151 } 152