FreeBSD-5.3/lib/libpthread/thread/thr_info.c
/*
* Copyright (c) 1995-1998 John Birrell <jb@cimlogic.com.au>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by John Birrell.
* 4. Neither the name of the author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD: src/lib/libpthread/thread/thr_info.c,v 1.27 2003/09/22 00:40:23 davidxu Exp $
*/
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <string.h>
#include <unistd.h>
#include <pthread.h>
#include <errno.h>
#include "thr_private.h"
#ifndef NELEMENTS
#define NELEMENTS(arr) (sizeof(arr) / sizeof(arr[0]))
#endif
static void dump_thread(int fd, pthread_t pthread, int long_version);
__weak_reference(_pthread_set_name_np, pthread_set_name_np);
struct s_thread_info {
enum pthread_state state;
char *name;
};
/* Static variables: */
static const struct s_thread_info thread_info[] = {
{PS_RUNNING , "Running"},
{PS_LOCKWAIT , "Waiting on an internal lock"},
{PS_MUTEX_WAIT , "Waiting on a mutex"},
{PS_COND_WAIT , "Waiting on a condition variable"},
{PS_SLEEP_WAIT , "Sleeping"},
{PS_SIGSUSPEND , "Suspended, waiting for a signal"},
{PS_SIGWAIT , "Waiting for a signal"},
{PS_JOIN , "Waiting to join"},
{PS_SUSPENDED , "Suspended"},
{PS_DEAD , "Dead"},
{PS_DEADLOCK , "Deadlocked"},
{PS_STATE_MAX , "Not a real state!"}
};
void
_thread_dump_info(void)
{
char s[512], tmpfile[128];
pthread_t pthread;
int fd, i;
for (i = 0; i < 100000; i++) {
snprintf(tmpfile, sizeof(tmpfile), "/tmp/pthread.dump.%u.%i",
getpid(), i);
/* Open the dump file for append and create it if necessary: */
if ((fd = __sys_open(tmpfile, O_RDWR | O_CREAT | O_EXCL,
0666)) < 0) {
/* Can't open the dump file. */
if (errno == EEXIST)
continue;
/*
* We only need to continue in case of
* EEXIT error. Most other error
* codes means that we will fail all
* the times.
*/
return;
} else {
break;
}
}
if (i==100000) {
/* all 100000 possibilities are in use :( */
return;
} else {
/* Dump the active threads. */
strcpy(s, "\n\n========\nACTIVE THREADS\n\n");
__sys_write(fd, s, strlen(s));
/* Enter a loop to report each thread in the global list: */
TAILQ_FOREACH(pthread, &_thread_list, tle) {
if (pthread->state != PS_DEAD)
dump_thread(fd, pthread, /*long_verson*/ 1);
}
/*
* Dump the ready threads.
* XXX - We can't easily do this because the run queues
* are per-KSEG.
*/
strcpy(s, "\n\n========\nREADY THREADS - unimplemented\n\n");
__sys_write(fd, s, strlen(s));
/*
* Dump the waiting threads.
* XXX - We can't easily do this because the wait queues
* are per-KSEG.
*/
strcpy(s, "\n\n========\nWAITING THREADS - unimplemented\n\n");
__sys_write(fd, s, strlen(s));
/* Close the dump file. */
__sys_close(fd);
}
}
static void
dump_thread(int fd, pthread_t pthread, int long_version)
{
struct pthread *curthread = _get_curthread();
char s[512];
int i;
/* Find the state: */
for (i = 0; i < NELEMENTS(thread_info) - 1; i++)
if (thread_info[i].state == pthread->state)
break;
/* Output a record for the thread: */
snprintf(s, sizeof(s),
"--------------------\n"
"Thread %p (%s), scope %s, prio %3d, blocked %s, state %s [%s:%d]\n",
pthread, (pthread->name == NULL) ? "" : pthread->name,
pthread->attr.flags & PTHREAD_SCOPE_SYSTEM ? "system" : "process",
pthread->active_priority, (pthread->blocked != 0) ? "yes" : "no",
thread_info[i].name, pthread->fname, pthread->lineno);
__sys_write(fd, s, strlen(s));
if (long_version != 0) {
/* Check if this is the running thread: */
if (pthread == curthread) {
/* Output a record for the running thread: */
strcpy(s, "This is the running thread\n");
__sys_write(fd, s, strlen(s));
}
/* Check if this is the initial thread: */
if (pthread == _thr_initial) {
/* Output a record for the initial thread: */
strcpy(s, "This is the initial thread\n");
__sys_write(fd, s, strlen(s));
}
/* Process according to thread state: */
switch (pthread->state) {
case PS_SIGWAIT:
snprintf(s, sizeof(s), "sigmask (hi) ");
__sys_write(fd, s, strlen(s));
for (i = _SIG_WORDS - 1; i >= 0; i--) {
snprintf(s, sizeof(s), "%08x ",
pthread->sigmask.__bits[i]);
__sys_write(fd, s, strlen(s));
}
snprintf(s, sizeof(s), "(lo)\n");
__sys_write(fd, s, strlen(s));
snprintf(s, sizeof(s), "waitset (hi) ");
__sys_write(fd, s, strlen(s));
for (i = _SIG_WORDS - 1; i >= 0; i--) {
snprintf(s, sizeof(s), "%08x ",
pthread->data.sigwait->waitset->__bits[i]);
__sys_write(fd, s, strlen(s));
}
snprintf(s, sizeof(s), "(lo)\n");
__sys_write(fd, s, strlen(s));
break;
/*
* Trap other states that are not explicitly
* coded to dump information:
*/
default:
snprintf(s, sizeof(s), "sigmask (hi) ");
__sys_write(fd, s, strlen(s));
for (i = _SIG_WORDS - 1; i >= 0; i--) {
snprintf(s, sizeof(s), "%08x ",
pthread->sigmask.__bits[i]);
__sys_write(fd, s, strlen(s));
}
snprintf(s, sizeof(s), "(lo)\n");
__sys_write(fd, s, strlen(s));
break;
}
}
}
/* Set the thread name for debug: */
void
_pthread_set_name_np(pthread_t thread, char *name)
{
/* Check if the caller has specified a valid thread: */
if (thread != NULL && thread->magic == THR_MAGIC) {
if (thread->name != NULL) {
/* Free space for previous name. */
free(thread->name);
}
thread->name = strdup(name);
}
}