2 * Copyright (c) 1995-1998 John Birrell <jb@cimlogic.com.au>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
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 $
36 #include <machine/tls.h>
45 #include "thr_private.h"
48 #define NELEMENTS(arr) (sizeof(arr) / sizeof(arr[0]))
51 static void dump_thread(int fd, pthread_t pthread, int long_version);
53 __weak_reference(_pthread_set_name_np, pthread_set_name_np);
55 struct s_thread_info {
56 enum pthread_state state;
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"},
67 {PS_DEADLOCK , "Deadlocked"},
68 {PS_STATE_MAX , "Not a real state!"}
72 _thread_dump_info(void)
74 char s[512], tmpfile[128];
78 for (i = 0; i < 100000; i++) {
79 snprintf(tmpfile, sizeof(tmpfile), "/tmp/pthread.dump.%u.%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,
84 /* Can't open the dump file. */
88 * We only need to continue in case of
89 * EEXIT error. Most other error
90 * codes means that we will fail all
99 /* all 100000 possibilities are in use :( */
102 /* Dump the active threads. */
103 strcpy(s, "\n\n========\nACTIVE THREADS\n\n");
104 __sys_write(fd, s, strlen(s));
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);
113 * Dump the ready threads.
114 * XXX - We can't easily do this because the run queues
117 strcpy(s, "\n\n========\nREADY THREADS - unimplemented\n\n");
118 __sys_write(fd, s, strlen(s));
122 * Dump the waiting threads.
123 * XXX - We can't easily do this because the wait queues
126 strcpy(s, "\n\n========\nWAITING THREADS - unimplemented\n\n");
127 __sys_write(fd, s, strlen(s));
129 /* Close the dump file. */
135 dump_thread(int fd, pthread_t pthread, int long_version)
137 struct pthread *curthread = tls_get_curthread();
141 /* Find the state: */
142 for (i = 0; i < NELEMENTS(thread_info) - 1; i++)
143 if (thread_info[i].state == pthread->state)
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));
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));
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));
170 /* Process according to thread state: */
171 switch (pthread->state) {
173 * Trap other states that are not explicitly
174 * coded to dump information:
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));
184 snprintf(s, sizeof(s), "(lo)\n");
185 __sys_write(fd, s, strlen(s));
191 /* Set the thread name for debug: */
193 _pthread_set_name_np(pthread_t thread, char *name)
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. */
201 thread->name = strdup(name);