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/****************************************************************************
* apps/system/stackmonitor/stackmonitor.c
*
* Copyright (C) 2013 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* 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. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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
* COPYRIGHT OWNER 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.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <sys/types.h>
#include <stdbool.h>
#include <unistd.h>
#include <sched.h>
#include <syslog.h>
#include <errno.h>
#include <nuttx/arch.h>
#ifdef CONFIG_SYSTEM_STACKMONITOR
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
#define STKMON_PREFIX "Stack Monitor: "
/* Configuration ************************************************************/
#ifndef CONFIG_SYSTEM_STACKMONITOR_STACKSIZE
# define CONFIG_SYSTEM_STACKMONITOR_STACKSIZE 2048
#endif
#ifndef CONFIG_SYSTEM_STACKMONITOR_PRIORITY
# define CONFIG_SYSTEM_STACKMONITOR_PRIORITY 50
#endif
#ifndef CONFIG_SYSTEM_STACKMONITOR_INTERVAL
# define CONFIG_SYSTEM_STACKMONITOR_INTERVAL 2
#endif
/****************************************************************************
* Private Types
****************************************************************************/
struct stkmon_state_s
{
volatile bool started;
volatile bool stop;
pid_t pid;
};
/****************************************************************************
* Private Data
****************************************************************************/
static struct stkmon_state_s g_stackmonitor;
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: stkmon_task
****************************************************************************/
static void stkmon_task(FAR struct tcb_s *tcb, FAR void *arg)
{
#if CONFIG_TASK_NAME_SIZE > 0
syslog(LOG_INFO, "%5d %6d %6d %s\n",
tcb->pid, tcb->adj_stack_size, up_check_tcbstack(tcb), tcb->name);
#else
syslog(LOG_INFO, "%5d %6d %6d\n",
tcb->pid, tcb->adj_stack_size, up_check_tcbstack(tcb));
#endif
}
static int stackmonitor_daemon(int argc, char **argv)
{
syslog(LOG_INFO, STKMON_PREFIX "Running: %d\n", g_stackmonitor.pid);
/* Loop until we detect that there is a request to stop. */
while (!g_stackmonitor.stop)
{
sleep(CONFIG_SYSTEM_STACKMONITOR_INTERVAL);
#if CONFIG_TASK_NAME_SIZE > 0
syslog(LOG_INFO, "%-5s %-6s %-6s %s\n", "PID", "SIZE", "USED", "THREAD NAME");
#else
syslog(LOG_INFO, "%-5s %-6s %-6s\n", "PID", "SIZE", "USED");
#endif
sched_foreach(stkmon_task, NULL);
}
/* Stopped */
g_stackmonitor.stop = false;
g_stackmonitor.started = false;
syslog(LOG_INFO, STKMON_PREFIX "Stopped: %d\n", g_stackmonitor.pid);
return 0;
}
/****************************************************************************
* Public Functions
****************************************************************************/
int stackmonitor_start(int argc, char **argv)
{
/* Has the monitor already started? */
sched_lock();
if (!g_stackmonitor.started)
{
int ret;
/* No.. start it now */
/* Then start the stack monitoring daemon */
g_stackmonitor.started = true;
g_stackmonitor.stop = false;
ret = task_create("Stack Monitor", CONFIG_SYSTEM_STACKMONITOR_PRIORITY,
CONFIG_SYSTEM_STACKMONITOR_STACKSIZE,
(main_t)stackmonitor_daemon, (FAR char * const *)NULL);
if (ret < 0)
{
int errcode = errno;
syslog(LOG_INFO, STKMON_PREFIX
"ERROR: Failed to start the stack monitor: %d\n",
errcode);
}
else
{
g_stackmonitor.pid = ret;
syslog(LOG_INFO, STKMON_PREFIX "Started: %d\n", g_stackmonitor.pid);
}
sched_unlock();
return 0;
}
sched_unlock();
syslog(LOG_INFO, STKMON_PREFIX "%s: %d\n",
g_stackmonitor.stop ? "Stopping" : "Running", g_stackmonitor.pid);
return 0;
}
int stackmonitor_stop(int argc, char **argv)
{
/* Has the monitor already started? */
if (g_stackmonitor.started)
{
/* Stop the stack monitor. The next time the monitor wakes up,
* it will see the the stop indication and will exist.
*/
syslog(LOG_INFO, STKMON_PREFIX "Stopping: %d\n", g_stackmonitor.pid);
g_stackmonitor.stop = true;
}
syslog(LOG_INFO, STKMON_PREFIX "Stopped: %d\n", g_stackmonitor.pid);
return 0;
}
#endif /* CONFIG_SYSTEM_STACKMONITOR */
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