1 // SPDX-License-Identifier: GPL-2.0
2 // Copyright (c) 2020 Facebook
3 #define _GNU_SOURCE
4 #include <test_progs.h>
5 #include "test_core_retro.skel.h"
6 
7 void test_core_retro(void)
8 {
9 	int err, zero = 0, res, my_pid = getpid();
10 	struct test_core_retro *skel;
11 
12 	/* load program */
13 	skel = test_core_retro__open_and_load();
14 	if (!ASSERT_OK_PTR(skel, "skel_load"))
15 		goto out_close;
16 
17 	err = bpf_map__update_elem(skel->maps.exp_tgid_map, &zero, sizeof(zero),
18 				   &my_pid, sizeof(my_pid), 0);
19 	if (!ASSERT_OK(err, "map_update"))
20 		goto out_close;
21 
22 	/* attach probe */
23 	err = test_core_retro__attach(skel);
24 	if (!ASSERT_OK(err, "attach_kprobe"))
25 		goto out_close;
26 
27 	/* trigger */
28 	usleep(1);
29 
30 	err = bpf_map__lookup_elem(skel->maps.results, &zero, sizeof(zero), &res, sizeof(res), 0);
31 	if (!ASSERT_OK(err, "map_lookup"))
32 		goto out_close;
33 
34 	ASSERT_EQ(res, my_pid, "pid_check");
35 
36 out_close:
37 	test_core_retro__destroy(skel);
38 }
39