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 __FBSDID("$FreeBSD$"); 38 39 #include "namespace.h" 40 #include <sys/errno.h> 41 #include <stdlib.h> 42 #include <string.h> 43 #include <pthread.h> 44 #include <pthread_np.h> 45 #include "un-namespace.h" 46 47 #include "thr_private.h" 48 49 static void 50 thr_set_name_np(struct pthread *thread, char **tmp_name) 51 { 52 53 free(thread->name); 54 thread->name = *tmp_name; 55 *tmp_name = NULL; 56 } 57 58 /* Set the thread name. */ 59 __weak_reference(_pthread_setname_np, pthread_setname_np); 60 int 61 _pthread_setname_np(pthread_t thread, const char *name) 62 { 63 struct pthread *curthread; 64 char *tmp_name; 65 int res; 66 67 if (name != NULL) { 68 tmp_name = strdup(name); 69 if (tmp_name == NULL) 70 return (ENOMEM); 71 } else { 72 tmp_name = NULL; 73 } 74 curthread = _get_curthread(); 75 if (curthread == thread) { 76 res = 0; 77 THR_THREAD_LOCK(curthread, thread); 78 if (thr_set_name(thread->tid, name) == -1) 79 res = errno; 80 else 81 thr_set_name_np(thread, &tmp_name); 82 THR_THREAD_UNLOCK(curthread, thread); 83 } else { 84 res = ESRCH; 85 if (_thr_find_thread(curthread, thread, 0) == 0) { 86 if (thread->state != PS_DEAD) { 87 if (thr_set_name(thread->tid, name) == -1) { 88 res = errno; 89 } else { 90 thr_set_name_np(thread, &tmp_name); 91 res = 0; 92 } 93 } 94 THR_THREAD_UNLOCK(curthread, thread); 95 } 96 } 97 free(tmp_name); 98 return (res); 99 } 100 101 /* Set the thread name for debug. */ 102 __weak_reference(_pthread_set_name_np, pthread_set_name_np); 103 void 104 _pthread_set_name_np(pthread_t thread, const char *name) 105 { 106 (void)_pthread_setname_np(thread, name); 107 } 108 109 static void 110 thr_get_name_np(struct pthread *thread, char *buf, size_t len) 111 { 112 113 if (thread->name != NULL) 114 strlcpy(buf, thread->name, len); 115 else if (len > 0) 116 buf[0] = '\0'; 117 } 118 119 __weak_reference(_pthread_getname_np, pthread_getname_np); 120 int 121 _pthread_getname_np(pthread_t thread, char *buf, size_t len) 122 { 123 struct pthread *curthread; 124 int res; 125 126 res = 0; 127 curthread = _get_curthread(); 128 if (curthread == thread) { 129 THR_THREAD_LOCK(curthread, thread); 130 thr_get_name_np(thread, buf, len); 131 THR_THREAD_UNLOCK(curthread, thread); 132 } else { 133 if (_thr_find_thread(curthread, thread, 0) == 0) { 134 if (thread->state != PS_DEAD) 135 thr_get_name_np(thread, buf, len); 136 else 137 res = ESRCH; 138 THR_THREAD_UNLOCK(curthread, thread); 139 } else { 140 res = ESRCH; 141 if (len > 0) 142 buf[0] = '\0'; 143 } 144 } 145 return (res); 146 } 147 148 __weak_reference(_pthread_get_name_np, pthread_get_name_np); 149 void 150 _pthread_get_name_np(pthread_t thread, char *buf, size_t len) 151 { 152 (void)_pthread_getname_np(thread, buf, len); 153 } 154