1 // SPDX-License-Identifier: GPL-2.0 <<
2 #include <signal.h> 1 #include <signal.h>
3 #include <stdlib.h> 2 #include <stdlib.h>
4 3
5 #include "tests.h" 4 #include "tests.h"
6 #include "debug.h" 5 #include "debug.h"
>> 6 #include "util.h"
7 #include "perf-hooks.h" 7 #include "perf-hooks.h"
8 8
9 static void sigsegv_handler(int sig __maybe_un 9 static void sigsegv_handler(int sig __maybe_unused)
10 { 10 {
11 pr_debug("SIGSEGV is observed as expec 11 pr_debug("SIGSEGV is observed as expected, try to recover.\n");
12 perf_hooks__recover(); 12 perf_hooks__recover();
13 signal(SIGSEGV, SIG_DFL); 13 signal(SIGSEGV, SIG_DFL);
14 raise(SIGSEGV); 14 raise(SIGSEGV);
15 exit(-1); 15 exit(-1);
16 } 16 }
17 17
18 18
19 static void the_hook(void *_hook_flags) 19 static void the_hook(void *_hook_flags)
20 { 20 {
21 int *hook_flags = _hook_flags; 21 int *hook_flags = _hook_flags;
>> 22 int *p = NULL;
22 23
23 *hook_flags = 1234; 24 *hook_flags = 1234;
24 25
25 /* Generate a segfault, test perf_hook 26 /* Generate a segfault, test perf_hooks__recover */
26 raise(SIGSEGV); !! 27 *p = 0;
27 } 28 }
28 29
29 static int test__perf_hooks(struct test_suite !! 30 int test__perf_hooks(int subtest __maybe_unused)
30 { 31 {
31 int hook_flags = 0; 32 int hook_flags = 0;
32 33
33 signal(SIGSEGV, sigsegv_handler); 34 signal(SIGSEGV, sigsegv_handler);
34 perf_hooks__set_hook("test", the_hook, 35 perf_hooks__set_hook("test", the_hook, &hook_flags);
35 perf_hooks__invoke_test(); 36 perf_hooks__invoke_test();
36 37
37 /* hook is triggered? */ 38 /* hook is triggered? */
38 if (hook_flags != 1234) { 39 if (hook_flags != 1234) {
39 pr_debug("Setting failed: %d ( 40 pr_debug("Setting failed: %d (%p)\n", hook_flags, &hook_flags);
40 return TEST_FAIL; 41 return TEST_FAIL;
41 } 42 }
42 43
43 /* the buggy hook is removed? */ 44 /* the buggy hook is removed? */
44 if (perf_hooks__get_hook("test")) 45 if (perf_hooks__get_hook("test"))
45 return TEST_FAIL; 46 return TEST_FAIL;
46 return TEST_OK; 47 return TEST_OK;
47 } 48 }
48 <<
49 DEFINE_SUITE("perf hooks", perf_hooks); <<
50 49
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.