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 "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
23 *hook_flags = 1234;
24
25 /* Generate a segfault, test perf_hooks__recover */
26 raise(SIGSEGV);
27}
28
29static int test__perf_hooks(struct test_suite *test __maybe_unused, int subtest __maybe_unused)
30{
31 int hook_flags = 0;
32
33 signal(SIGSEGV, sigsegv_handler);
34 perf_hooks__set_hook("test", the_hook, &hook_flags);
35 perf_hooks__invoke_test();
36
37 /* hook is triggered? */
38 if (hook_flags != 1234) {
39 pr_debug("Setting failed: %d (%p)\n", hook_flags, &hook_flags);
40 return TEST_FAIL;
41 }
42
43 /* the buggy hook is removed? */
44 if (perf_hooks__get_hook("test"))
45 return TEST_FAIL;
46 return TEST_OK;
47}
48
49DEFINE_SUITE("perf hooks", perf_hooks);
50

source code of linux/tools/perf/tests/perf-hooks.c