176 lines
6.1 KiB
C
176 lines
6.1 KiB
C
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/*
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* Copyright (c) 1995 John Birrell <jb@cimlogic.com.au>.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by John Birrell.
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* 4. Neither the name of the author nor the names of any co-contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#include <stdio.h>
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#include <fcntl.h>
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#include <string.h>
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#include <unistd.h>
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#ifdef _THREAD_SAFE
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#include <pthread.h>
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#include "pthread_private.h"
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struct s_thread_info {
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enum pthread_state state;
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char *name;
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};
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/* Static variables: */
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static const struct s_thread_info thread_info[] = {
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{PS_RUNNING , "Running"},
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{PS_SIGTHREAD , "Waiting on signal thread"},
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{PS_MUTEX_WAIT , "Waiting on a mutex"},
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{PS_COND_WAIT , "Waiting on a condition variable"},
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{PS_FDLR_WAIT , "Waiting for a file read lock"},
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{PS_FDLW_WAIT , "Waiting for a file write lock"},
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{PS_FDR_WAIT , "Waiting for read"},
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{PS_FDW_WAIT , "Waitingfor write"},
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{PS_SELECT_WAIT , "Waiting on select"},
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{PS_SLEEP_WAIT , "Sleeping"},
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{PS_WAIT_WAIT , "Waiting process"},
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{PS_SIGWAIT , "Waiting for a signal"},
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{PS_JOIN , "Waiting to join"},
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{PS_SUSPENDED , "Suspended"},
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{PS_DEAD , "Dead"},
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{PS_STATE_MAX , "Not a real state!"}
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};
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void
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_thread_dump_info(void)
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{
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char s[128];
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int fd;
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int i;
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int j;
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pthread_t pthread;
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/* Open the dump file for append and create it if necessary: */
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if ((fd = _thread_sys_open("/tmp/uthread.dump", O_RDWR | O_CREAT | O_APPEND, 0666)) < 0) {
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/* Can't open the dump file. */
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} else {
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/* Output a header for active threads: */
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strcpy(s, "\n\n=============\nACTIVE THREADS\n\n");
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_thread_sys_write(fd, s, strlen(s));
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/* Enter a loop to report each thread in the global list: */
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for (pthread = _thread_link_list; pthread != NULL; pthread = pthread->nxt) {
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/* Find the state: */
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for (j = 0; j < (sizeof(thread_info) / sizeof(struct s_thread_info)) - 1; j++)
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if (thread_info[j].state == pthread->state)
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break;
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/* Output a record for the current thread: */
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sprintf(s, "--------------------\nThread %p prio %3d state %s\n",
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pthread, pthread->pthread_priority, thread_info[j].name);
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_thread_sys_write(fd, s, strlen(s));
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/* Check if this is the running thread: */
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if (pthread == _thread_run) {
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/* Output a record for the running thread: */
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strcpy(s, "This is the running thread\n");
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_thread_sys_write(fd, s, strlen(s));
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}
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/* Check if this is the initial thread: */
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if (pthread == _thread_initial) {
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/* Output a record for the initial thread: */
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strcpy(s, "This is the initial thread\n");
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_thread_sys_write(fd, s, strlen(s));
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}
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/* Process according to thread state: */
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switch (pthread->state) {
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/* File descriptor read lock wait: */
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case PS_FDLR_WAIT:
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/* Write the lock details: */
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sprintf(s, "fd %d[%s:%d]", pthread->data.fd.fd, pthread->data.fd.fname, pthread->data.fd.branch);
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_thread_sys_write(fd, s, strlen(s));
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sprintf(s, "owner %pr/%pw\n", _thread_fd_table[pthread->data.fd.fd]->r_owner, _thread_fd_table[pthread->data.fd.fd]->w_owner);
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_thread_sys_write(fd, s, strlen(s));
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break;
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/*
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* Trap other states that are not explicitly
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* coded to dump information:
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*/
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default:
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/* Nothing to do here. */
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break;
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}
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}
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/* Check if there are no dead threads: */
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if (_thread_dead == NULL) {
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/* Output a record: */
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strcpy(s, "\n\nTHERE ARE NO DEAD THREADS\n");
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_thread_sys_write(fd, s, strlen(s));
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} else {
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/* Output a header for dead threads: */
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strcpy(s, "\n\nDEAD THREADS\n\n");
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_thread_sys_write(fd, s, strlen(s));
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/*
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* Enter a loop to report each thread in the global
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* dead thread list:
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*/
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for (pthread = _thread_dead; pthread != NULL; pthread = pthread->nxt) {
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/* Output a record for the current thread: */
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sprintf(s, "Thread %p prio %3d\n", pthread, pthread->pthread_priority);
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_thread_sys_write(fd, s, strlen(s));
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}
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}
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/* Enter a loop to report file descriptor lock usage: */
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for (i = 0; i < _thread_dtablesize; i++) {
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/*
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* Check if memory is allocated for this file
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* descriptor:
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*/
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if (_thread_fd_table[i] != NULL) {
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/* Report the file descriptor lock status: */
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sprintf(s, "fd[%3d] read owner %p count %d [%s:%d]\n write owner %p count %d [%s:%d]\n",
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i,
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_thread_fd_table[i]->r_owner,
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_thread_fd_table[i]->r_lockcount,
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_thread_fd_table[i]->r_fname,
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_thread_fd_table[i]->r_lineno,
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_thread_fd_table[i]->w_owner,
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_thread_fd_table[i]->w_lockcount,
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_thread_fd_table[i]->w_fname,
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_thread_fd_table[i]->w_lineno);
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_thread_sys_write(fd, s, strlen(s));
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}
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}
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/* Close the dump file: */
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_thread_sys_close(fd);
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}
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return;
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}
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#endif
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