246 lines
7.1 KiB
C
246 lines
7.1 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 "namespace.h"
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#include <stdio.h>
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#include <stdlib.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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#include <pthread.h>
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#include <errno.h>
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#include "un-namespace.h"
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#include "thr_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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void _pthread_set_name_np(pthread_t thread, char *name);
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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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const 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_LOCKWAIT , "Waiting on an internal lock"},
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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_SLEEP_WAIT , "Sleeping"},
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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_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], tempfile[128];
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pthread_t pthread;
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int fd, i;
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for (i = 0; i < 100000; i++) {
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snprintf(tempfile, sizeof(tempfile), "/tmp/pthread.dump.%u.%i",
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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(tempfile, O_RDWR | O_CREAT | O_EXCL,
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0666)) < 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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* EEXIT error. Most other error
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* codes means that we will fail all
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* the times.
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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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/* Dump the 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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if (pthread->state != PS_DEAD)
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dump_thread(fd, pthread, /*long_verson*/ 1);
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}
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/*
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* Dump the ready threads.
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* XXX - We can't easily do this because the run queues
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* are per-KSEG.
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*/
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strcpy(s, "\n\n========\nREADY THREADS - unimplemented\n\n");
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__sys_write(fd, s, strlen(s));
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/*
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* Dump the waiting threads.
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* XXX - We can't easily do this because the wait queues
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* are per-KSEG.
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*/
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strcpy(s, "\n\n========\nWAITING THREADS - unimplemented\n\n");
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__sys_write(fd, s, strlen(s));
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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 < (int)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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"--------------------\n"
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"Thread %p (%s), scope %s, prio %3d, blocked %s, state %s [%s:%d]\n",
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pthread, (pthread->name == NULL) ? "" : pthread->name,
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pthread->attr.flags & PTHREAD_SCOPE_SYSTEM ? "system" : "process",
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pthread->active_priority, (pthread->blocked != 0) ? "yes" : "no",
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thread_info[i].name, pthread->fname, pthread->lineno);
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__sys_write(fd, s, strlen(s));
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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 == _thr_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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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 ",
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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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snprintf(s, sizeof(s), "waitset (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 ",
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pthread->data.sigwait->waitset->__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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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 ",
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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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}
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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, char *name)
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{
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struct pthread *curthread = _get_curthread();
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char *new_name;
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char *prev_name;
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int ret;
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new_name = strdup(name);
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/* Add a reference to the target thread. */
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if (_thr_ref_add(curthread, thread, 0) != 0) {
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free(new_name);
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ret = ESRCH;
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}
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else {
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THR_THREAD_LOCK(curthread, thread);
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prev_name = thread->name;
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thread->name = new_name;
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THR_THREAD_UNLOCK(curthread, thread);
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_thr_ref_delete(curthread, thread);
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if (prev_name != NULL) {
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/* Free space for previous name. */
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free(prev_name);
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}
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ret = 0;
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}
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#if 0
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/* XXX - Should return error code. */
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return (ret);
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#endif
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}
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