]>
Commit | Line | Data |
---|---|---|
6dab2778 AV |
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 | ||
ad118c54 | 13 | #include <linux/delay.h> |
6dab2778 AV |
14 | #include <linux/module.h> |
15 | #include <linux/sched.h> | |
ad118c54 | 16 | #include <linux/stacktrace.h> |
6dab2778 AV |
17 | |
18 | static struct timer_list backtrace_timer; | |
19 | ||
20 | static void backtrace_test_timer(unsigned long data) | |
21 | { | |
22 | printk("Testing a backtrace from irq context.\n"); | |
23 | printk("The following trace is a kernel self test and not a bug!\n"); | |
24 | dump_stack(); | |
25 | } | |
ad118c54 VN |
26 | |
27 | #ifdef CONFIG_STACKTRACE | |
28 | static void backtrace_test_saved(void) | |
29 | { | |
30 | struct stack_trace trace; | |
31 | unsigned long entries[8]; | |
32 | ||
33 | printk("Testing a saved backtrace.\n"); | |
34 | printk("The following trace is a kernel self test and not a bug!\n"); | |
35 | ||
36 | trace.nr_entries = 0; | |
37 | trace.max_entries = ARRAY_SIZE(entries); | |
38 | trace.entries = entries; | |
39 | trace.skip = 0; | |
40 | ||
41 | save_stack_trace(&trace); | |
42 | print_stack_trace(&trace, 0); | |
43 | } | |
44 | #else | |
45 | static void backtrace_test_saved(void) | |
46 | { | |
47 | printk("Saved backtrace test skipped.\n"); | |
48 | } | |
49 | #endif | |
50 | ||
6dab2778 AV |
51 | static int backtrace_regression_test(void) |
52 | { | |
53 | printk("====[ backtrace testing ]===========\n"); | |
54 | printk("Testing a backtrace from process context.\n"); | |
55 | printk("The following trace is a kernel self test and not a bug!\n"); | |
56 | dump_stack(); | |
57 | ||
ad118c54 VN |
58 | backtrace_test_saved(); |
59 | ||
6dab2778 AV |
60 | init_timer(&backtrace_timer); |
61 | backtrace_timer.function = backtrace_test_timer; | |
62 | mod_timer(&backtrace_timer, jiffies + 10); | |
63 | ||
64 | msleep(10); | |
65 | printk("====[ end of backtrace testing ]====\n"); | |
66 | return 0; | |
67 | } | |
68 | ||
69 | static void exitf(void) | |
70 | { | |
71 | } | |
72 | ||
73 | module_init(backtrace_regression_test); | |
74 | module_exit(exitf); | |
75 | MODULE_LICENSE("GPL"); | |
76 | MODULE_AUTHOR("Arjan van de Ven <arjan@linux.intel.com>"); |