1// SPDX-License-Identifier: GPL-2.0
 2#include <signal.h>
 3#include <stdlib.h>
 4
 5#include "tests.h"
 6#include "debug.h"
 7#include "util.h"
 8#include "perf-hooks.h"
 9
10static void sigsegv_handler(int sig __maybe_unused)
11{
12	pr_debug("SIGSEGV is observed as expected, try to recover.\n");
13	perf_hooks__recover();
14	signal(SIGSEGV, SIG_DFL);
15	raise(SIGSEGV);
16	exit(-1);
17}
18
19
20static void the_hook(void *_hook_flags)
21{
22	int *hook_flags = _hook_flags;
23	int *p = NULL;
24
25	*hook_flags = 1234;
26
27	/* Generate a segfault, test perf_hooks__recover */
28	*p = 0;
29}
30
31int test__perf_hooks(struct test *test __maybe_unused, int subtest __maybe_unused)
32{
33	int hook_flags = 0;
34
35	signal(SIGSEGV, sigsegv_handler);
36	perf_hooks__set_hook("test", the_hook, &hook_flags);
37	perf_hooks__invoke_test();
38
39	/* hook is triggered? */
40	if (hook_flags != 1234) {
41		pr_debug("Setting failed: %d (%p)\n", hook_flags, &hook_flags);
42		return TEST_FAIL;
43	}
44
45	/* the buggy hook is removed? */
46	if (perf_hooks__get_hook("test"))
47		return TEST_FAIL;
48	return TEST_OK;
49}