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During the work on the x86 32 and 64 bit backtrace code I found it useful to have a simple test module to test a process and irq context backtrace. Since the existing backtrace code was buggy, I figure it might be useful to have such a test module in the kernel so that maybe we can even detect such bugs earlier.. [ mingo@elte.hu: build fix ] Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
49 lines
1.3 KiB
C
49 lines
1.3 KiB
C
/*
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* Simple stack backtrace regression test module
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*
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* (C) Copyright 2008 Intel Corporation
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* Author: Arjan van de Ven <arjan@linux.intel.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; version 2
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* of the License.
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*/
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#include <linux/module.h>
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#include <linux/sched.h>
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#include <linux/delay.h>
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static struct timer_list backtrace_timer;
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static void backtrace_test_timer(unsigned long data)
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{
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printk("Testing a backtrace from irq context.\n");
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printk("The following trace is a kernel self test and not a bug!\n");
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dump_stack();
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}
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static int backtrace_regression_test(void)
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{
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printk("====[ backtrace testing ]===========\n");
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printk("Testing a backtrace from process context.\n");
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printk("The following trace is a kernel self test and not a bug!\n");
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dump_stack();
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init_timer(&backtrace_timer);
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backtrace_timer.function = backtrace_test_timer;
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mod_timer(&backtrace_timer, jiffies + 10);
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msleep(10);
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printk("====[ end of backtrace testing ]====\n");
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return 0;
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}
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static void exitf(void)
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{
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}
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module_init(backtrace_regression_test);
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module_exit(exitf);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Arjan van de Ven <arjan@linux.intel.com>");
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