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 <sys/cdefs.h> 37 #include "namespace.h" 38 #include <sys/errno.h> 39 #include <stdlib.h> 40 #include <string.h> 41 #include <pthread.h> 42 #include <pthread_np.h> 43 #include "un-namespace.h" 44 45 #include "thr_private.h" 46 47 static void 48 thr_set_name_np(struct pthread *thread, char **tmp_name) 49 { 50 51 free(thread->name); 52 thread->name = *tmp_name; 53 *tmp_name = NULL; 54 } 55 56 /* Set the thread name. */ 57 __weak_reference(_pthread_setname_np, pthread_setname_np); 58 int 59 _pthread_setname_np(pthread_t thread, const char *name) 60 { 61 struct pthread *curthread; 62 char *tmp_name; 63 int res; 64 65 if (name != NULL) { 66 tmp_name = strdup(name); 67 if (tmp_name == NULL) 68 return (ENOMEM); 69 } else { 70 tmp_name = NULL; 71 } 72 curthread = _get_curthread(); 73 if (curthread == thread) { 74 res = 0; 75 THR_THREAD_LOCK(curthread, thread); 76 if (thr_set_name(thread->tid, name) == -1) 77 res = errno; 78 else 79 thr_set_name_np(thread, &tmp_name); 80 THR_THREAD_UNLOCK(curthread, thread); 81 } else { 82 res = ESRCH; 83 if (_thr_find_thread(curthread, thread, 0) == 0) { 84 if (thread->state != PS_DEAD) { 85 if (thr_set_name(thread->tid, name) == -1) { 86 res = errno; 87 } else { 88 thr_set_name_np(thread, &tmp_name); 89 res = 0; 90 } 91 } 92 THR_THREAD_UNLOCK(curthread, thread); 93 } 94 } 95 free(tmp_name); 96 return (res); 97 } 98 99 /* Set the thread name for debug. */ 100 __weak_reference(_pthread_set_name_np, pthread_set_name_np); 101 void 102 _pthread_set_name_np(pthread_t thread, const char *name) 103 { 104 (void)_pthread_setname_np(thread, name); 105 } 106 107 static void 108 thr_get_name_np(struct pthread *thread, char *buf, size_t len) 109 { 110 111 if (thread->name != NULL) 112 strlcpy(buf, thread->name, len); 113 else if (len > 0) 114 buf[0] = '\0'; 115 } 116 117 __weak_reference(_thr_getname_np, pthread_getname_np); 118 __weak_reference(_thr_getname_np, _pthread_getname_np); 119 int 120 _thr_getname_np(pthread_t thread, char *buf, size_t len) 121 { 122 struct pthread *curthread; 123 int res; 124 125 res = 0; 126 curthread = _get_curthread(); 127 if (curthread == thread) { 128 THR_THREAD_LOCK(curthread, thread); 129 thr_get_name_np(thread, buf, len); 130 THR_THREAD_UNLOCK(curthread, thread); 131 } else { 132 if (_thr_find_thread(curthread, thread, 0) == 0) { 133 if (thread->state != PS_DEAD) 134 thr_get_name_np(thread, buf, len); 135 else 136 res = ESRCH; 137 THR_THREAD_UNLOCK(curthread, thread); 138 } else { 139 res = ESRCH; 140 if (len > 0) 141 buf[0] = '\0'; 142 } 143 } 144 return (res); 145 } 146 147 __weak_reference(_pthread_get_name_np, pthread_get_name_np); 148 void 149 _pthread_get_name_np(pthread_t thread, char *buf, size_t len) 150 { 151 (void)_thr_getname_np(thread, buf, len); 152 } 153