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
sigsegv_handler(int sig __maybe_unused)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
the_hook(void * _hook_flags)20 static 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
test__perf_hooks(struct test * test __maybe_unused,int subtest __maybe_unused)31 int 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 }
50
