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 int *p = NULL; 24 25 *hook_flags = 1234; 26 27 /* Generate a segfault, test perf_hooks__recover */ 28 *p = 0; 29 } 30 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