1 /* 2 * Copyright (c) 1995-1998 John Birrell <jb@cimlogic.com.au> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by John Birrell. 16 * 4. Neither the name of the author nor the names of any co-contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * $FreeBSD: src/lib/libpthread/thread/thr_info.c,v 1.27 2003/09/22 00:40:23 davidxu Exp $ 33 * $DragonFly: src/lib/libthread_xu/thread/thr_info.c,v 1.2 2005/03/29 19:26:20 joerg Exp $ 34 */ 35 36 #include <machine/tls.h> 37 38 #include <stdio.h> 39 #include <stdlib.h> 40 #include <fcntl.h> 41 #include <string.h> 42 #include <unistd.h> 43 #include <pthread.h> 44 #include <errno.h> 45 #include "thr_private.h" 46 47 #ifndef NELEMENTS 48 #define NELEMENTS(arr) (sizeof(arr) / sizeof(arr[0])) 49 #endif 50 51 static void dump_thread(int fd, pthread_t pthread, int long_version); 52 53 __weak_reference(_pthread_set_name_np, pthread_set_name_np); 54 55 struct s_thread_info { 56 enum pthread_state state; 57 char *name; 58 }; 59 60 /* Static variables: */ 61 static const struct s_thread_info thread_info[] = { 62 {PS_RUNNING , "Running"}, 63 {PS_MUTEX_WAIT , "Waiting on a mutex"}, 64 {PS_JOIN , "Waiting to join"}, 65 {PS_SUSPENDED , "Suspended"}, 66 {PS_DEAD , "Dead"}, 67 {PS_DEADLOCK , "Deadlocked"}, 68 {PS_STATE_MAX , "Not a real state!"} 69 }; 70 71 void 72 _thread_dump_info(void) 73 { 74 char s[512], tmpfile[128]; 75 pthread_t pthread; 76 int fd, i; 77 78 for (i = 0; i < 100000; i++) { 79 snprintf(tmpfile, sizeof(tmpfile), "/tmp/pthread.dump.%u.%i", 80 getpid(), i); 81 /* Open the dump file for append and create it if necessary: */ 82 if ((fd = __sys_open(tmpfile, O_RDWR | O_CREAT | O_EXCL, 83 0666)) < 0) { 84 /* Can't open the dump file. */ 85 if (errno == EEXIST) 86 continue; 87 /* 88 * We only need to continue in case of 89 * EEXIT error. Most other error 90 * codes means that we will fail all 91 * the times. 92 */ 93 return; 94 } else { 95 break; 96 } 97 } 98 if (i==100000) { 99 /* all 100000 possibilities are in use :( */ 100 return; 101 } else { 102 /* Dump the active threads. */ 103 strcpy(s, "\n\n========\nACTIVE THREADS\n\n"); 104 __sys_write(fd, s, strlen(s)); 105 106 /* Enter a loop to report each thread in the global list: */ 107 TAILQ_FOREACH(pthread, &_thread_list, tle) { 108 if (pthread->state != PS_DEAD) 109 dump_thread(fd, pthread, /*long_verson*/ 1); 110 } 111 112 /* 113 * Dump the ready threads. 114 * XXX - We can't easily do this because the run queues 115 * are per-KSEG. 116 */ 117 strcpy(s, "\n\n========\nREADY THREADS - unimplemented\n\n"); 118 __sys_write(fd, s, strlen(s)); 119 120 121 /* 122 * Dump the waiting threads. 123 * XXX - We can't easily do this because the wait queues 124 * are per-KSEG. 125 */ 126 strcpy(s, "\n\n========\nWAITING THREADS - unimplemented\n\n"); 127 __sys_write(fd, s, strlen(s)); 128 129 /* Close the dump file. */ 130 __sys_close(fd); 131 } 132 } 133 134 static void 135 dump_thread(int fd, pthread_t pthread, int long_version) 136 { 137 struct pthread *curthread = tls_get_curthread(); 138 char s[512]; 139 int i; 140 141 /* Find the state: */ 142 for (i = 0; i < NELEMENTS(thread_info) - 1; i++) 143 if (thread_info[i].state == pthread->state) 144 break; 145 146 /* Output a record for the thread: */ 147 snprintf(s, sizeof(s), 148 "--------------------\n" 149 "Thread %p (%s), scope %s, prio %3d, state %s [%s:%d]\n", 150 pthread, (pthread->name == NULL) ? "" : pthread->name, 151 pthread->attr.flags & PTHREAD_SCOPE_SYSTEM ? "system" : "process", 152 pthread->active_priority, 153 thread_info[i].name, pthread->fname, pthread->lineno); 154 __sys_write(fd, s, strlen(s)); 155 156 if (long_version != 0) { 157 /* Check if this is the running thread: */ 158 if (pthread == curthread) { 159 /* Output a record for the running thread: */ 160 strcpy(s, "This is the running thread\n"); 161 __sys_write(fd, s, strlen(s)); 162 } 163 /* Check if this is the initial thread: */ 164 if (pthread == _thr_initial) { 165 /* Output a record for the initial thread: */ 166 strcpy(s, "This is the initial thread\n"); 167 __sys_write(fd, s, strlen(s)); 168 } 169 170 /* Process according to thread state: */ 171 switch (pthread->state) { 172 /* 173 * Trap other states that are not explicitly 174 * coded to dump information: 175 */ 176 default: 177 snprintf(s, sizeof(s), "sigmask (hi) "); 178 __sys_write(fd, s, strlen(s)); 179 for (i = _SIG_WORDS - 1; i >= 0; i--) { 180 snprintf(s, sizeof(s), "%08x ", 181 pthread->sigmask.__bits[i]); 182 __sys_write(fd, s, strlen(s)); 183 } 184 snprintf(s, sizeof(s), "(lo)\n"); 185 __sys_write(fd, s, strlen(s)); 186 break; 187 } 188 } 189 } 190 191 /* Set the thread name for debug: */ 192 void 193 _pthread_set_name_np(pthread_t thread, char *name) 194 { 195 /* Check if the caller has specified a valid thread: */ 196 if (thread != NULL && thread->magic == THR_MAGIC) { 197 if (thread->name != NULL) { 198 /* Free space for previous name. */ 199 free(thread->name); 200 } 201 thread->name = strdup(name); 202 } 203 } 204