GNU Linux-libre 4.19.211-gnu1
[releases.git] / tools / perf / tests / perf-hooks.c
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
10 static 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
20 static void the_hook(void *_hook_flags)
21 {
22         int *hook_flags = _hook_flags;
23
24         *hook_flags = 1234;
25
26         /* Generate a segfault, test perf_hooks__recover */
27         raise(SIGSEGV);
28 }
29
30 int test__perf_hooks(struct test *test __maybe_unused, 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 }