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 1.1 2005/02/01 12:38:27 davidxu Exp $ 34 */ 35 #include <stdio.h> 36 #include <stdlib.h> 37 #include <fcntl.h> 38 #include <string.h> 39 #include <unistd.h> 40 #include <pthread.h> 41 #include <errno.h> 42 #include "thr_private.h" 43 44 #ifndef NELEMENTS 45 #define NELEMENTS(arr) (sizeof(arr) / sizeof(arr[0])) 46 #endif 47 48 static void dump_thread(int fd, pthread_t pthread, int long_version); 49 50 __weak_reference(_pthread_set_name_np, pthread_set_name_np); 51 52 struct s_thread_info { 53 enum pthread_state state; 54 char *name; 55 }; 56 57 /* Static variables: */ 58 static const struct s_thread_info thread_info[] = { 59 {PS_RUNNING , "Running"}, 60 {PS_MUTEX_WAIT , "Waiting on a mutex"}, 61 {PS_JOIN , "Waiting to join"}, 62 {PS_SUSPENDED , "Suspended"}, 63 {PS_DEAD , "Dead"}, 64 {PS_DEADLOCK , "Deadlocked"}, 65 {PS_STATE_MAX , "Not a real state!"} 66 }; 67 68 void 69 _thread_dump_info(void) 70 { 71 char s[512], tmpfile[128]; 72 pthread_t pthread; 73 int fd, i; 74 75 for (i = 0; i < 100000; i++) { 76 snprintf(tmpfile, sizeof(tmpfile), "/tmp/pthread.dump.%u.%i", 77 getpid(), i); 78 /* Open the dump file for append and create it if necessary: */ 79 if ((fd = __sys_open(tmpfile, O_RDWR | O_CREAT | O_EXCL, 80 0666)) < 0) { 81 /* Can't open the dump file. */ 82 if (errno == EEXIST) 83 continue; 84 /* 85 * We only need to continue in case of 86 * EEXIT error. Most other error 87 * codes means that we will fail all 88 * the times. 89 */ 90 return; 91 } else { 92 break; 93 } 94 } 95 if (i==100000) { 96 /* all 100000 possibilities are in use :( */ 97 return; 98 } else { 99 /* Dump the active threads. */ 100 strcpy(s, "\n\n========\nACTIVE THREADS\n\n"); 101 __sys_write(fd, s, strlen(s)); 102 103 /* Enter a loop to report each thread in the global list: */ 104 TAILQ_FOREACH(pthread, &_thread_list, tle) { 105 if (pthread->state != PS_DEAD) 106 dump_thread(fd, pthread, /*long_verson*/ 1); 107 } 108 109 /* 110 * Dump the ready threads. 111 * XXX - We can't easily do this because the run queues 112 * are per-KSEG. 113 */ 114 strcpy(s, "\n\n========\nREADY THREADS - unimplemented\n\n"); 115 __sys_write(fd, s, strlen(s)); 116 117 118 /* 119 * Dump the waiting threads. 120 * XXX - We can't easily do this because the wait queues 121 * are per-KSEG. 122 */ 123 strcpy(s, "\n\n========\nWAITING THREADS - unimplemented\n\n"); 124 __sys_write(fd, s, strlen(s)); 125 126 /* Close the dump file. */ 127 __sys_close(fd); 128 } 129 } 130 131 static void 132 dump_thread(int fd, pthread_t pthread, int long_version) 133 { 134 struct pthread *curthread = _get_curthread(); 135 char s[512]; 136 int i; 137 138 /* Find the state: */ 139 for (i = 0; i < NELEMENTS(thread_info) - 1; i++) 140 if (thread_info[i].state == pthread->state) 141 break; 142 143 /* Output a record for the thread: */ 144 snprintf(s, sizeof(s), 145 "--------------------\n" 146 "Thread %p (%s), scope %s, prio %3d, state %s [%s:%d]\n", 147 pthread, (pthread->name == NULL) ? "" : pthread->name, 148 pthread->attr.flags & PTHREAD_SCOPE_SYSTEM ? "system" : "process", 149 pthread->active_priority, 150 thread_info[i].name, pthread->fname, pthread->lineno); 151 __sys_write(fd, s, strlen(s)); 152 153 if (long_version != 0) { 154 /* Check if this is the running thread: */ 155 if (pthread == curthread) { 156 /* Output a record for the running thread: */ 157 strcpy(s, "This is the running thread\n"); 158 __sys_write(fd, s, strlen(s)); 159 } 160 /* Check if this is the initial thread: */ 161 if (pthread == _thr_initial) { 162 /* Output a record for the initial thread: */ 163 strcpy(s, "This is the initial thread\n"); 164 __sys_write(fd, s, strlen(s)); 165 } 166 167 /* Process according to thread state: */ 168 switch (pthread->state) { 169 /* 170 * Trap other states that are not explicitly 171 * coded to dump information: 172 */ 173 default: 174 snprintf(s, sizeof(s), "sigmask (hi) "); 175 __sys_write(fd, s, strlen(s)); 176 for (i = _SIG_WORDS - 1; i >= 0; i--) { 177 snprintf(s, sizeof(s), "%08x ", 178 pthread->sigmask.__bits[i]); 179 __sys_write(fd, s, strlen(s)); 180 } 181 snprintf(s, sizeof(s), "(lo)\n"); 182 __sys_write(fd, s, strlen(s)); 183 break; 184 } 185 } 186 } 187 188 /* Set the thread name for debug: */ 189 void 190 _pthread_set_name_np(pthread_t thread, char *name) 191 { 192 /* Check if the caller has specified a valid thread: */ 193 if (thread != NULL && thread->magic == THR_MAGIC) { 194 if (thread->name != NULL) { 195 /* Free space for previous name. */ 196 free(thread->name); 197 } 198 thread->name = strdup(name); 199 } 200 } 201