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/*
* Copyright (c) 1995 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 REGENTS 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.
*
*/
#include <stdio.h>
#include <fcntl.h>
#include <string.h>
#include <unistd.h>
#ifdef _THREAD_SAFE
#include <pthread.h>
#include "pthread_private.h"
struct s_thread_info {
enum pthread_state state;
char *name;
};
/* Static variables: */
static const struct s_thread_info thread_info[] = {
{PS_RUNNING , "Running"},
{PS_SIGTHREAD , "Waiting on signal thread"},
{PS_MUTEX_WAIT , "Waiting on a mutex"},
{PS_COND_WAIT , "Waiting on a condition variable"},
{PS_FDLR_WAIT , "Waiting for a file read lock"},
{PS_FDLW_WAIT , "Waiting for a file write lock"},
{PS_FDR_WAIT , "Waiting for read"},
{PS_FDW_WAIT , "Waitingfor write"},
{PS_SELECT_WAIT , "Waiting on select"},
{PS_SLEEP_WAIT , "Sleeping"},
{PS_WAIT_WAIT , "Waiting process"},
{PS_SIGWAIT , "Waiting for a signal"},
{PS_JOIN , "Waiting to join"},
{PS_SUSPENDED , "Suspended"},
{PS_DEAD , "Dead"},
{PS_STATE_MAX , "Not a real state!"}
};
void
_thread_dump_info(void)
{
char s[128];
int fd;
int i;
int j;
pthread_t pthread;
/* Open the dump file for append and create it if necessary: */
if ((fd = _thread_sys_open("/tmp/uthread.dump", O_RDWR | O_CREAT | O_APPEND, 0666)) < 0) {
/* Can't open the dump file. */
} else {
/* Output a header for active threads: */
strcpy(s, "\n\n=============\nACTIVE THREADS\n\n");
_thread_sys_write(fd, s, strlen(s));
/* Enter a loop to report each thread in the global list: */
for (pthread = _thread_link_list; pthread != NULL; pthread = pthread->nxt) {
/* Find the state: */
for (j = 0; j < (sizeof(thread_info) / sizeof(struct s_thread_info)) - 1; j++)
if (thread_info[j].state == pthread->state)
break;
/* Output a record for the current thread: */
sprintf(s, "--------------------\nThread %p prio %3d state %s [%s:%d]\n",
pthread, pthread->pthread_priority, thread_info[j].name,pthread->fname,pthread->lineno);
_thread_sys_write(fd, s, strlen(s));
/* Check if this is the running thread: */
if (pthread == _thread_run) {
/* Output a record for the running thread: */
strcpy(s, "This is the running thread\n");
_thread_sys_write(fd, s, strlen(s));
}
/* Check if this is the initial thread: */
if (pthread == _thread_initial) {
/* Output a record for the initial thread: */
strcpy(s, "This is the initial thread\n");
_thread_sys_write(fd, s, strlen(s));
}
/* Process according to thread state: */
switch (pthread->state) {
/* File descriptor read lock wait: */
case PS_FDLR_WAIT:
case PS_FDLW_WAIT:
case PS_FDR_WAIT:
case PS_FDW_WAIT:
/* Write the lock details: */
sprintf(s, "fd %d[%s:%d]", pthread->data.fd.fd, pthread->data.fd.fname, pthread->data.fd.branch);
_thread_sys_write(fd, s, strlen(s));
sprintf(s, "owner %pr/%pw\n", _thread_fd_table[pthread->data.fd.fd]->r_owner, _thread_fd_table[pthread->data.fd.fd]->w_owner);
_thread_sys_write(fd, s, strlen(s));
break;
/*
* Trap other states that are not explicitly
* coded to dump information:
*/
default:
/* Nothing to do here. */
break;
}
}
/* Check if there are no dead threads: */
if (_thread_dead == NULL) {
/* Output a record: */
strcpy(s, "\n\nTHERE ARE NO DEAD THREADS\n");
_thread_sys_write(fd, s, strlen(s));
} else {
/* Output a header for dead threads: */
strcpy(s, "\n\nDEAD THREADS\n\n");
_thread_sys_write(fd, s, strlen(s));
/*
* Enter a loop to report each thread in the global
* dead thread list:
*/
for (pthread = _thread_dead; pthread != NULL; pthread = pthread->nxt) {
/* Output a record for the current thread: */
sprintf(s, "Thread %p prio %3d [%s:%d]\n", pthread, pthread->pthread_priority,pthread->fname,pthread->lineno);
_thread_sys_write(fd, s, strlen(s));
}
}
/* Output a header for file descriptors: */
strcpy(s, "\n\n=============\nFILE DESCRIPTOR TABLE\n\n");
_thread_sys_write(fd, s, strlen(s));
/* Enter a loop to report file descriptor lock usage: */
for (i = 0; i < _thread_dtablesize; i++) {
/*
* Check if memory is allocated for this file
* descriptor:
*/
if (_thread_fd_table[i] != NULL) {
/* Report the file descriptor lock status: */
sprintf(s, "fd[%3d] read owner %p count %d [%s:%d]\n write owner %p count %d [%s:%d]\n",
i,
_thread_fd_table[i]->r_owner,
_thread_fd_table[i]->r_lockcount,
_thread_fd_table[i]->r_fname,
_thread_fd_table[i]->r_lineno,
_thread_fd_table[i]->w_owner,
_thread_fd_table[i]->w_lockcount,
_thread_fd_table[i]->w_fname,
_thread_fd_table[i]->w_lineno);
_thread_sys_write(fd, s, strlen(s));
}
}
/* Close the dump file: */
_thread_sys_close(fd);
}
return;
}
#endif
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