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Diffstat (limited to 'apps/system/stackmonitor/stackmonitor.c')
| -rw-r--r-- | apps/system/stackmonitor/stackmonitor.c | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/apps/system/stackmonitor/stackmonitor.c b/apps/system/stackmonitor/stackmonitor.c new file mode 100644 index 000000000..98039828c --- /dev/null +++ b/apps/system/stackmonitor/stackmonitor.c @@ -0,0 +1,178 @@ +/**************************************************************************** + * 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 + ****************************************************************************/ + +static int stackmonitor_daemon(int argc, char **argv) +{ + syslog(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); + } + + /* Stopped */ + + g_stackmonitor.stop = false; + g_stackmonitor.started = false; + syslog(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(STKMON_PREFIX + "ERROR: Failed to start the stack monitor: %d\n", + errcode); + } + else + { + g_stackmonitor.pid = ret; + syslog(STKMON_PREFIX "Started: %d\n", g_stackmonitor.pid); + } + + sched_unlock(); + return 0; + } + + sched_unlock(); + syslog(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(STKMON_PREFIX "Stopping: %d\n", g_stackmonitor.pid); + g_stackmonitor.stop = true; + } + + syslog(STKMON_PREFIX "Stopped: %d\n", g_stackmonitor.pid); + return 0; +} + +#endif /* CONFIG_SYSTEM_STACKMONITOR */ |