kernel/backtracetest.c

   1 /*
   2  * Simple stack backtrace regression test module
   3  *
   4  * (C) Copyright 2008 Intel Corporation
   5  * Author: Arjan van de Ven <arjan@linux.intel.com>
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License
   9  * as published by the Free Software Foundation; version 2
  10  * of the License.
  11  */
  12
  13 #include <linux/module.h>
  14 #include <linux/sched.h>
  15 #include <linux/delay.h>
  16
  17 static struct timer_list backtrace_timer;
  18
  19 static void backtrace_test_timer(unsigned long data)
  20 {
  21         printk("Testing a backtrace from irq context.\n");
  22         printk("The following trace is a kernel self test and not a bug!\n");
  23         dump_stack();
  24 }
  25 static int backtrace_regression_test(void)
  26 {
  27         printk("====[ backtrace testing ]===========\n");
  28         printk("Testing a backtrace from process context.\n");
  29         printk("The following trace is a kernel self test and not a bug!\n");
  30         dump_stack();
  31
  32         init_timer(&backtrace_timer);
  33         backtrace_timer.function = backtrace_test_timer;
  34         mod_timer(&backtrace_timer, jiffies + 10);
  35
  36         msleep(10);
  37         printk("====[ end of backtrace testing ]====\n");
  38         return 0;
  39 }
  40
  41 static void exitf(void)
  42 {
  43 }
  44
  45 module_init(backtrace_regression_test);
  46 module_exit(exitf);
  47 MODULE_LICENSE("GPL");
  48 MODULE_AUTHOR("Arjan van de Ven <arjan@linux.intel.com>");