/* $OpenBSD: uthread_info.c,v 1.11 2002/10/21 23:10:29 marc Exp $ */ /* * Copyright (c) 1995-1998 John Birrell * 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: uthread_info.c,v 1.14 1999/09/29 15:18:38 marcel Exp $ */ #include #include #include #include #ifdef _THREAD_SAFE #include #include #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 , "Waiting for write"}, {PS_FILE_WAIT , "Waiting for FILE lock"}, {PS_POLL_WAIT , "Waiting on poll"}, {PS_SELECT_WAIT , "Waiting on select"}, {PS_SLEEP_WAIT , "Sleeping"}, {PS_WAIT_WAIT , "Waiting process"}, {PS_SIGSUSPEND , "Suspended, waiting for a signal"}, {PS_SIGWAIT , "Waiting for a signal"}, {PS_SPINBLOCK , "Waiting for a spinlock"}, {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) { struct pthread *curthread = _get_curthread(); char s[512]; int fd; int i; int j; pthread_t pthread; char tmpfile[128]; pq_list_t *pq_list; for (i = 0; i < 100000; i++) { snprintf(tmpfile, sizeof(tmpfile), "/tmp/uthread.dump.%u.%i", getpid(), i); /* Open the dump file for append and create it if necessary: */ if ((fd = _thread_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 { /* 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: */ TAILQ_FOREACH(pthread, &_thread_list, tle) { /* 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: */ snprintf(s, sizeof(s), "--------------------\nThread %p (%s) prio %3d state %s [%s:%d]\n", pthread, (pthread->name == NULL) ? "":pthread->name, pthread->base_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 == curthread) { /* 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: */ snprintf(s, sizeof(s), "fd %d[%s:%d]", pthread->data.fd.fd, pthread->data.fd.fname, pthread->data.fd.branch); _thread_sys_write(fd, s, strlen(s)); if (_thread_fd_table[pthread->data.fd.fd]) snprintf(s, sizeof(s), "owner %pr/%pw\n", _thread_fd_table[pthread->data.fd.fd]->r_owner, _thread_fd_table[pthread->data.fd.fd]->w_owner); else snprintf(s, sizeof(s), "owner [unknown]\n"); _thread_sys_write(fd, s, strlen(s)); break; case PS_SIGWAIT: snprintf(s, sizeof(s), "sigmask (hi)"); _thread_sys_write(fd, s, strlen(s)); for (i = _SIG_WORDS - 1; i >= 0; i--) { snprintf(s, sizeof(s), "%08x\n", pthread->sigmask.__bits[i]); _thread_sys_write(fd, s, strlen(s)); } snprintf(s, sizeof(s), "(lo)\n"); _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; } } /* Output a header for ready threads: */ strcpy(s, "\n\n=============\nREADY THREADS\n\n"); _thread_sys_write(fd, s, strlen(s)); /* Enter a loop to report each thread in the ready queue: */ TAILQ_FOREACH (pq_list, &_readyq.pq_queue, pl_link) { TAILQ_FOREACH(pthread, &pq_list->pl_head, pqe) { /* 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: */ snprintf(s, sizeof(s), "--------------------\nThread %p (%s) prio %3d state %s [%s:%d]\n", pthread, (pthread->name == NULL) ? "":pthread->name, pthread->base_priority, thread_info[j].name, pthread->fname,pthread->lineno); _thread_sys_write(fd, s, strlen(s)); } } /* Output a header for waiting threads: */ strcpy(s, "\n\n=============\nWAITING THREADS\n\n"); _thread_sys_write(fd, s, strlen(s)); /* Enter a loop to report each thread in the waiting queue: */ TAILQ_FOREACH (pthread, &_waitingq, pqe) { /* 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: */ snprintf(s, sizeof(s), "--------------------\nThread %p (%s) prio %3d state %s [%s:%d]\n", pthread, (pthread->name == NULL) ? "":pthread->name, pthread->base_priority, thread_info[j].name, pthread->fname,pthread->lineno); _thread_sys_write(fd, s, strlen(s)); } /* Output a header for threads in the work queue: */ strcpy(s, "\n\n=============\nTHREADS IN WORKQ\n\n"); _thread_sys_write(fd, s, strlen(s)); /* Enter a loop to report each thread in the waiting queue: */ TAILQ_FOREACH (pthread, &_workq, qe) { /* 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: */ snprintf(s, sizeof(s), "--------------------\nThread %p (%s) prio %3d state %s [%s:%d]\n", pthread, (pthread->name == NULL) ? "":pthread->name, pthread->base_priority, thread_info[j].name, pthread->fname,pthread->lineno); _thread_sys_write(fd, s, strlen(s)); } /* Check if there are no dead threads: */ if (TAILQ_FIRST(&_dead_list) == 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: */ TAILQ_FOREACH(pthread, &_dead_list, dle) { /* Output a record for the current thread: */ snprintf(s, sizeof(s), "Thread %p prio %3d [%s:%d]\n", pthread, pthread->base_priority, pthread->fname,pthread->lineno); _thread_sys_write(fd, s, strlen(s)); } } /* Output a header for file descriptors: */ snprintf(s, sizeof(s), "\n\n=============\nFILE DESCRIPTOR TABLE (table size %d)\n\n",_thread_dtablesize); _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: */ snprintf(s, sizeof(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; } /* 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 == PTHREAD_MAGIC) thread->name = strdup(name); return; } #endif