1#include <signal.h>
 2#include <stdlib.h>
 3
 4#include "tests.h"
 5#include "debug.h"
 6#include "util.h"
 7#include "perf-hooks.h"
 8
 9static void sigsegv_handler(int sig __maybe_unused)
10{
11	pr_debug("SIGSEGV is observed as expected, try to recover.\n");
12	perf_hooks__recover();
13	signal(SIGSEGV, SIG_DFL);
14	raise(SIGSEGV);
15	exit(-1);
16}
17
18
19static void the_hook(void *_hook_flags)
20{
21	int *hook_flags = _hook_flags;
22	int *p = NULL;
23
24	*hook_flags = 1234;
25
26	/* Generate a segfault, test perf_hooks__recover */
27	*p = 0;
28}
29
30int test__perf_hooks(int subtest __maybe_unused)
31{
32	int hook_flags = 0;
33
34	signal(SIGSEGV, sigsegv_handler);
35	perf_hooks__set_hook("test", the_hook, &hook_flags);
36	perf_hooks__invoke_test();
37
38	/* hook is triggered? */
39	if (hook_flags != 1234) {
40		pr_debug("Setting failed: %d (%p)\n", hook_flags, &hook_flags);
41		return TEST_FAIL;
42	}
43
44	/* the buggy hook is removed? */
45	if (perf_hooks__get_hook("test"))
46		return TEST_FAIL;
47	return TEST_OK;
48}