294 lines
8.9 KiB
C
294 lines
8.9 KiB
C
/*
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* Copyright (c) 1995-1998 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. 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 AUTHOR 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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* $FreeBSD$
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*/
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#include <errno.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <paths.h>
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#include <pthread.h>
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#include <unistd.h>
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#include "pthread_private.h"
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#ifndef NELEMENTS
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#define NELEMENTS(arr) (sizeof(arr) / sizeof(arr[0]))
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#endif
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static void dump_thread(int fd, pthread_t pthread, int long_version);
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__weak_reference(_pthread_set_name_np, pthread_set_name_np);
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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 , "Waiting for write"},
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{PS_FILE_WAIT , "Waiting for FILE lock"},
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{PS_POLL_WAIT , "Waiting on poll"},
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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_SIGSUSPEND , "Suspended, waiting for a signal"},
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{PS_SIGWAIT , "Waiting for a signal"},
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{PS_SPINBLOCK , "Waiting for a spinlock"},
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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_DEADLOCK , "Deadlocked"},
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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[512];
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int fd;
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int i;
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pthread_t pthread;
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char *tmpdir;
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char tmpfile[PATH_MAX];
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pq_list_t *pq_list;
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if (issetugid() != 0 || (tmpdir = getenv("TMPDIR")) == NULL)
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tmpdir = _PATH_TMP;
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for (i = 0; i < 100000; i++) {
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snprintf(tmpfile, sizeof(tmpfile), "%s/uthread.dump.%u.%i",
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tmpdir, getpid(), i);
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/* Open the dump file for append and create it if necessary: */
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if ((fd = __sys_open(tmpfile, O_RDWR | O_CREAT | O_EXCL,
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0644)) < 0) {
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/* Can't open the dump file. */
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if (errno == EEXIST)
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continue;
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/*
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* We only need to continue in case of
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* EEXIST error. Most other error
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* codes means that we will fail all
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* the time.
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*/
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return;
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} else {
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break;
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}
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}
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if (i==100000) {
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/* all 100000 possibilities are in use :( */
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return;
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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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__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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TAILQ_FOREACH(pthread, &_thread_list, tle) {
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dump_thread(fd, pthread, /*long_verson*/ 1);
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}
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/* Output a header for ready threads: */
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strcpy(s, "\n\n=============\nREADY THREADS\n\n");
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__sys_write(fd, s, strlen(s));
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/* Enter a loop to report each thread in the ready queue: */
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TAILQ_FOREACH (pq_list, &_readyq.pq_queue, pl_link) {
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TAILQ_FOREACH(pthread, &pq_list->pl_head, pqe) {
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dump_thread(fd, pthread, /*long_version*/ 0);
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}
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}
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/* Output a header for waiting threads: */
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strcpy(s, "\n\n=============\nWAITING THREADS\n\n");
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__sys_write(fd, s, strlen(s));
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/* Enter a loop to report each thread in the waiting queue: */
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TAILQ_FOREACH (pthread, &_waitingq, pqe) {
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dump_thread(fd, pthread, /*long_version*/ 0);
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}
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/* Output a header for threads in the work queue: */
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strcpy(s, "\n\n=============\nTHREADS IN WORKQ\n\n");
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__sys_write(fd, s, strlen(s));
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/* Enter a loop to report each thread in the waiting queue: */
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TAILQ_FOREACH (pthread, &_workq, qe) {
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dump_thread(fd, pthread, /*long_version*/ 0);
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}
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/* Check if there are no dead threads: */
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if (TAILQ_FIRST(&_dead_list) == 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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__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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__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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TAILQ_FOREACH(pthread, &_dead_list, dle) {
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dump_thread(fd, pthread, /*long_version*/ 0);
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}
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}
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/* Output a header for file descriptors: */
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snprintf(s, sizeof(s), "\n\n=============\nFILE DESCRIPTOR "
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"TABLE (table size %d)\n\n", _thread_dtablesize);
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__sys_write(fd, s, strlen(s));
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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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snprintf(s, sizeof(s),
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"fd[%3d] read owner %p count %d [%s:%d]\n"
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" write owner %p count %d [%s:%d]\n",
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i, _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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__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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__sys_close(fd);
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}
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}
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static void
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dump_thread(int fd, pthread_t pthread, int long_version)
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{
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struct pthread *curthread = _get_curthread();
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char s[512];
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int i;
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/* Find the state: */
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for (i = 0; i < NELEMENTS(thread_info) - 1; i++)
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if (thread_info[i].state == pthread->state)
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break;
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/* Output a record for the thread: */
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snprintf(s, sizeof(s),
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"--------------------\nThread %p (%s) prio %3d state %s",
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pthread, (pthread->name == NULL) ? "" : pthread->name,
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pthread->active_priority, thread_info[i].name);
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__sys_write(fd, s, strlen(s));
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/* And now where it is. */
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if (pthread->fname != NULL) {
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snprintf(s, sizeof(s), " [%s:%d]", pthread->fname,
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pthread->lineno);
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__sys_write(fd, s, strlen(s));
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}
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__sys_write(fd, "\n", 1);
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if (long_version != 0) {
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/* Check if this is the running thread: */
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if (pthread == curthread) {
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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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__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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__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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case PS_FDLW_WAIT:
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case PS_FDR_WAIT:
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case PS_FDW_WAIT:
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/* Write the lock details: */
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snprintf(s, sizeof(s), "fd %d[%s:%d]",
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pthread->data.fd.fd,
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pthread->data.fd.fname,
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pthread->data.fd.branch);
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__sys_write(fd, s, strlen(s));
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break;
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case PS_SIGWAIT:
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snprintf(s, sizeof(s), "sigmask (hi)");
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__sys_write(fd, s, strlen(s));
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for (i = _SIG_WORDS - 1; i >= 0; i--) {
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snprintf(s, sizeof(s), "%08x\n",
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pthread->sigmask.__bits[i]);
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__sys_write(fd, s, strlen(s));
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}
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snprintf(s, sizeof(s), "(lo)\n");
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__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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}
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/* Set the thread name for debug: */
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void
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_pthread_set_name_np(pthread_t thread, const char *name)
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{
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/* Check if the caller has specified a valid thread: */
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if (thread != NULL && thread->magic == PTHREAD_MAGIC) {
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if (thread->name != NULL) {
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/* Free space for previous name. */
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free(thread->name);
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}
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thread->name = strdup(name);
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}
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}
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