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author | Arjan van de Ven <arjan@infradead.org> | 2008-01-30 13:33:08 +0100 |
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committer | Ingo Molnar <mingo@elte.hu> | 2008-01-30 13:33:08 +0100 |
commit | 6dab27784b2a97823b522e1cb88e40be40a93d45 (patch) | |
tree | 75ee27b4841aad5800531e591aed141164071727 /kernel/backtracetest.c | |
parent | 80b51f310b6f55006a265d087b8f48744e65663d (diff) | |
download | kernel_samsung_tuna-6dab27784b2a97823b522e1cb88e40be40a93d45.zip kernel_samsung_tuna-6dab27784b2a97823b522e1cb88e40be40a93d45.tar.gz kernel_samsung_tuna-6dab27784b2a97823b522e1cb88e40be40a93d45.tar.bz2 |
x86: add a simple backtrace test module
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>
Diffstat (limited to 'kernel/backtracetest.c')
-rw-r--r-- | kernel/backtracetest.c | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/kernel/backtracetest.c b/kernel/backtracetest.c new file mode 100644 index 0000000..d1a7605 --- /dev/null +++ b/kernel/backtracetest.c @@ -0,0 +1,48 @@ +/* + * Simple stack backtrace regression test module + * + * (C) Copyright 2008 Intel Corporation + * Author: Arjan van de Ven <arjan@linux.intel.com> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; version 2 + * of the License. + */ + +#include <linux/module.h> +#include <linux/sched.h> +#include <linux/delay.h> + +static struct timer_list backtrace_timer; + +static void backtrace_test_timer(unsigned long data) +{ + printk("Testing a backtrace from irq context.\n"); + printk("The following trace is a kernel self test and not a bug!\n"); + dump_stack(); +} +static int backtrace_regression_test(void) +{ + printk("====[ backtrace testing ]===========\n"); + printk("Testing a backtrace from process context.\n"); + printk("The following trace is a kernel self test and not a bug!\n"); + dump_stack(); + + init_timer(&backtrace_timer); + backtrace_timer.function = backtrace_test_timer; + mod_timer(&backtrace_timer, jiffies + 10); + + msleep(10); + printk("====[ end of backtrace testing ]====\n"); + return 0; +} + +static void exitf(void) +{ +} + +module_init(backtrace_regression_test); +module_exit(exitf); +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Arjan van de Ven <arjan@linux.intel.com>"); |