x86: add a simple backtrace test module

[mv-sheeva.git] / kernel / backtracetest.c

diff --git a/kernel/backtracetest.c b/kernel/backtracetest.c
new file mode 100644 (file)
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>");