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>"); 49