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/*
* Copyright (c) 1995-1998 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>
#include <stdlib.h>
#ifdef _THREAD_SAFE
#include <pthread.h>
#include "pthread_private.h"
extern int _thread_sig_statistics[];
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 , "sigthread"},
{PS_MUTEX_WAIT , "mutex_wait"},
{PS_COND_WAIT , "cond_wait"},
{PS_FDLR_WAIT , "fdlr_wait"},
{PS_FDLW_WAIT , "fdlw_wait"},
{PS_FDR_WAIT , "fdr_wait"},
{PS_FDW_WAIT , "fdw_wait"},
{PS_FILE_WAIT , "file_wait"},
{PS_SELECT_WAIT , "select_wait"},
{PS_SLEEP_WAIT , "sleep_wait"},
{PS_WAIT_WAIT , "wait_wait"},
{PS_SIGSUSPEND , "sigsuspend"},
{PS_SIGWAIT , "sigwait"},
{PS_JOIN , "join"},
{PS_SUSPENDED , "suspended"},
{PS_DEAD , "dead"},
{PS_STATE_MAX , "xxx"}
};
/* Determine a filename for display purposes: */
static const char *
truncname(const char *name, int maxlen)
{
int len;
if (name == NULL)
name = "(null)";
len = strlen(name);
if (len > maxlen)
return name + len - maxlen;
else
return name;
}
void
_thread_dump_info(void)
{
char s[512];
int fd;
int i;
int j;
pthread_t pthread;
const char *state;
/* Open either the controlling tty or the dump file */
fd = _thread_sys_open(_PATH_TTY, O_WRONLY | O_APPEND);
if (fd < 0)
fd = _thread_sys_open(INFO_DUMP_FILE,
O_WRONLY | O_APPEND | O_CREAT, 0666);
if (fd < 0)
return;
/* Display a list of active threads */
snprintf(s, sizeof s, " %8s%c%-11s %2s %4s %-8s %5s %5s %s\n",
"id", ' ', "state", "pr", "flag", "name", "utime", "stime",
"location");
_thread_sys_write(fd, s, strlen(s));
for (pthread = _thread_link_list; pthread != NULL;
pthread = pthread->nxt)
{
char location[30];
/* Find last known file:line checkpoint: */
if (pthread->fname)
snprintf(location, sizeof location, "%s:%d",
truncname(pthread->fname, 21), pthread->lineno);
else
location[0] = '\0';
/* 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;
state = thread_info[j].name;
/* Output a record for the current thread: */
s[0] = 0;
snprintf(s, sizeof(s),
" %8p%c%-11s %2d %c%c%c%c %-8s %5.2f %5.2f %s\n",
(void *)pthread,
(pthread == _thread_run) ? '*' : ' ',
state,
pthread->pthread_priority,
(pthread->attr.flags & PTHREAD_DETACHED) ? 'D' : ' ',
(pthread->attr.flags & PTHREAD_SCOPE_SYSTEM) ? 'S' : ' ',
(pthread->attr.flags & PTHREAD_INHERIT_SCHED) ? 'I' : ' ',
(pthread->attr.flags & PTHREAD_NOFLOAT) ? 'F' : ' ',
(pthread->name == NULL) ? "" : pthread->name,
pthread->ru_utime.tv_sec +
(double)pthread->ru_utime.tv_usec / 1000000.0,
pthread->ru_stime.tv_sec +
(double)pthread->ru_stime.tv_usec / 1000000.0,
location
);
_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]\n",
pthread->data.fd.fd,
truncname(pthread->data.fd.fname, 32),
pthread->data.fd.branch);
_thread_sys_write(fd, s, strlen(s));
s[0] = 0;
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);
_thread_sys_write(fd, s, strlen(s));
break;
case PS_SIGWAIT:
snprintf(s, sizeof(s), " - sigmask 0x%08lx\n",
(unsigned long)pthread->sigmask);
_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 file descriptors: */
snprintf(s, sizeof(s), "file descriptor table, size %d\n",
_thread_dtablesize);
_thread_sys_write(fd, s, strlen(s));
snprintf(s, sizeof s,
" %3s %8s %4s %21s %8s %4s %21s\n",
"fd", "rdowner", "rcnt", "rdcode",
"wrowner", "wcnt", "wrcode");
_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:
*/
char rcode[22], wcode[22];
if (_thread_fd_table[i] != NULL) {
/* Find the reader's last file:line: */
if (_thread_fd_table[i]->r_owner)
snprintf(rcode, sizeof rcode, "%s:%d",
truncname(_thread_fd_table[i]->r_fname, 16),
_thread_fd_table[i]->r_lineno);
else
rcode[0] = '\0';
/* Find the writer's last file:line: */
if (_thread_fd_table[i]->w_owner)
snprintf(wcode, sizeof wcode, "%s:%d",
truncname(_thread_fd_table[i]->w_fname, 16),
_thread_fd_table[i]->w_lineno);
else
wcode[0] = '\0';
/* Report the file descriptor lock status: */
snprintf(s, sizeof(s),
" %3d %8p %4d %21s %8p %4d %21s\n",
i,
_thread_fd_table[i]->r_owner,
_thread_fd_table[i]->r_lockcount,
rcode,
_thread_fd_table[i]->w_owner,
_thread_fd_table[i]->w_lockcount,
wcode
);
_thread_sys_write(fd, s, strlen(s));
}
}
/* Show signal counter statistics: */
snprintf(s, sizeof s, "sig:");
for (i = 0; i < NSIG; i++) {
char buf[16] = " xx:xxxxx";
if (_thread_sig_statistics[i]) {
snprintf(buf, sizeof buf, " %d:%d", i,
_thread_sig_statistics[i]);
strlcat(s, buf, sizeof s);
}
}
strlcat(s, "\n", sizeof s);
_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) {
if (thread->name != NULL)
free(thread->name);
thread->name = strdup(name);
}
return;
}
#endif
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