mirror of
https://github.com/torvalds/linux.git
synced 2024-12-27 05:11:48 +00:00
45 lines
815 B
C
45 lines
815 B
C
|
#include <signal.h>
|
||
|
|
#include <stdlib.h>
|
||
|
|
|
||
|
|
#include "tests.h"
|
||
|
|
#include "debug.h"
|
||
|
|
#include "util.h"
|
||
|
|
#include "perf-hooks.h"
|
||
|
|
|
||
|
|
static void sigsegv_handler(int sig __maybe_unused)
|
||
|
|
{
|
||
|
|
pr_debug("SIGSEGV is observed as expected, try to recover.\n");
|
||
|
|
perf_hooks__recover();
|
||
|
|
signal(SIGSEGV, SIG_DFL);
|
||
|
|
raise(SIGSEGV);
|
||
|
|
exit(-1);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int hook_flags;
|
||
|
|
|
||
|
|
static void the_hook(void)
|
||
|
|
{
|
||
|
|
int *p = NULL;
|
||
|
|
|
||
|
|
hook_flags = 1234;
|
||
|
|
|
||
|
|
/* Generate a segfault, test perf_hooks__recover */
|
||
|
|
*p = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
int test__perf_hooks(int subtest __maybe_unused)
|
||
|
|
{
|
||
|
|
signal(SIGSEGV, sigsegv_handler);
|
||
|
|
perf_hooks__set_hook("test", the_hook);
|
||
|
|
perf_hooks__invoke_test();
|
||
|
|
|
||
|
|
/* hook is triggered? */
|
||
|
|
if (hook_flags != 1234)
|
||
|
|
return TEST_FAIL;
|
||
|
|
|
||
|
|
/* the buggy hook is removed? */
|
||
|
|
if (perf_hooks__get_hook("test"))
|
||
|
|
return TEST_FAIL;
|
||
|
|
return TEST_OK;
|
||
|
|
}
|