text: // SPDX-License-Identifier: GPL-2.0
  #include <signal.h>
  #include <stdlib.h>
  
  #include "tests.h"
  #include "debug.h"
  #include "util.h"
  #include "perf-hooks.h"
  
  static void sigsegv_handler(int sig __maybe_unused)
  {
  	pr_debug("SIGSEGV is observed as expected, try to recover.\n");
  	perf_hooks__recover();
  	signal(SIGSEGV, SIG_DFL);
  	raise(SIGSEGV);
  	exit(-1);
  }
  
  
  static void the_hook(void *_hook_flags)
  {
  	int *hook_flags = _hook_flags;
  
  	*hook_flags = 1234;
  
  	/* Generate a segfault, test perf_hooks__recover */
  	raise(SIGSEGV);
  }
  
  int test__perf_hooks(struct test *test __maybe_unused, int subtest __maybe_unused)
  {
  	int hook_flags = 0;
  
  	signal(SIGSEGV, sigsegv_handler);
  	perf_hooks__set_hook("test", the_hook, &hook_flags);
  	perf_hooks__invoke_test();
  
  	/* hook is triggered? */
  	if (hook_flags != 1234) {
  		pr_debug("Setting failed: %d (%p)\n", hook_flags, &hook_flags);
  		return TEST_FAIL;
  	}
  
  	/* the buggy hook is removed? */
  	if (perf_hooks__get_hook("test"))
  		return TEST_FAIL;
  	return TEST_OK;
  }
  