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stacktrace: add saved stack traces to backtrace self-test

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This patch adds saved stack-traces to the backtrace suite of self-tests.

Note that we don't depend on or unconditionally enable CONFIG_STACKTRACE
because not all architectures may have it (and we still want to enable the
other tests for those architectures).

Cc: Arjan van de Ven <arjan@infradead.org>
Signed-off-by: Vegard Nossum <vegard.nossum@gmail.com>
Cc: Arjan van de Ven <arjan@infradead.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Vegard Nossum 2008-06-27 18:04:48 +02:00 • committed by Ingo Molnar
parent a5a242dcee
commit ad118c54a3
2 changed files with 32 additions and 1 deletions
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30
kernel/backtracetest.c
View file

@ -10,9 +10,10 @@
* of the License.
*/
#include <linux/delay.h>
#include <linux/module.h>
#include <linux/sched.h>
#include <linux/delay.h>
#include <linux/stacktrace.h>
static struct timer_list backtrace_timer;
@ -22,6 +23,31 @@ static void backtrace_test_timer(unsigned long data)
printk("The following trace is a kernel self test and not a bug!\n");
dump_stack();
}
#ifdef CONFIG_STACKTRACE
static void backtrace_test_saved(void)
{
struct stack_trace trace;
unsigned long entries[8];
printk("Testing a saved backtrace.\n");
printk("The following trace is a kernel self test and not a bug!\n");
trace.nr_entries = 0;
trace.max_entries = ARRAY_SIZE(entries);
trace.entries = entries;
trace.skip = 0;
save_stack_trace(&trace);
print_stack_trace(&trace, 0);
}
#else
static void backtrace_test_saved(void)
{
printk("Saved backtrace test skipped.\n");
}
#endif
static int backtrace_regression_test(void)
{
printk("====[ backtrace testing ]===========\n");
@ -29,6 +55,8 @@ static int backtrace_regression_test(void)
printk("The following trace is a kernel self test and not a bug!\n");
dump_stack();
backtrace_test_saved();
init_timer(&backtrace_timer);
backtrace_timer.function = backtrace_test_timer;
mod_timer(&backtrace_timer, jiffies + 10);