Quellcode-Bibliothek perf-hooks.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0
#include <signal.h>
#include <stdlib.h>

#include "tests.h"
#include "debug.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);
}

static int test__perf_hooks(struct test_suite *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;
}

DEFINE_SUITE("perf hooks", perf_hooks);