1 #include <signal.h> 2 #include <stdlib.h> 3 4 #include "tests.h" 5 #include "debug.h" 6 #include "util.h" 7 #include "perf-hooks.h" 8 9 static 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 19 static void the_hook(void *_hook_flags) 20 { 21 int *hook_flags = _hook_flags; 22 int *p = NULL; 23 24 *hook_flags = 1234; 25 26 /* Generate a segfault, test perf_hooks__recover */ 27 *p = 0; 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 } 49