test_btf_ext.c

 1// SPDX-License-Identifier: GPL-2.0
 2/* Copyright (c) 2025 Meta Platforms Inc. */
 3#include <test_progs.h>
 4#include "test_btf_ext.skel.h"
 5#include "btf_helpers.h"
 6
 7static void subtest_line_func_info(void)
 8{
 9	struct test_btf_ext *skel;
10	struct bpf_prog_info info;
11	struct bpf_line_info line_info[128], *libbpf_line_info;
12	struct bpf_func_info func_info[128], *libbpf_func_info;
13	__u32 info_len = sizeof(info), libbbpf_line_info_cnt, libbbpf_func_info_cnt;
14	int err, fd;
15
16	skel = test_btf_ext__open_and_load();
17	if (!ASSERT_OK_PTR(skel, "skel_open_and_load"))
18		return;
19
20	fd = bpf_program__fd(skel->progs.global_func);
21
22	memset(&info, 0, sizeof(info));
23	info.line_info = ptr_to_u64(&line_info);
24	info.nr_line_info = sizeof(line_info);
25	info.line_info_rec_size = sizeof(*line_info);
26	err = bpf_prog_get_info_by_fd(fd, &info, &info_len);
27	if (!ASSERT_OK(err, "prog_line_info"))
28		goto out;
29
30	libbpf_line_info = bpf_program__line_info(skel->progs.global_func);
31	libbbpf_line_info_cnt = bpf_program__line_info_cnt(skel->progs.global_func);
32
33	memset(&info, 0, sizeof(info));
34	info.func_info = ptr_to_u64(&func_info);
35	info.nr_func_info = sizeof(func_info);
36	info.func_info_rec_size = sizeof(*func_info);
37	err = bpf_prog_get_info_by_fd(fd, &info, &info_len);
38	if (!ASSERT_OK(err, "prog_func_info"))
39		goto out;
40
41	libbpf_func_info = bpf_program__func_info(skel->progs.global_func);
42	libbbpf_func_info_cnt = bpf_program__func_info_cnt(skel->progs.global_func);
43
44	if (!ASSERT_OK_PTR(libbpf_line_info, "bpf_program__line_info"))
45		goto out;
46	if (!ASSERT_EQ(libbbpf_line_info_cnt, info.nr_line_info, "line_info_cnt"))
47		goto out;
48	if (!ASSERT_OK_PTR(libbpf_func_info, "bpf_program__func_info"))
49		goto out;
50	if (!ASSERT_EQ(libbbpf_func_info_cnt, info.nr_func_info, "func_info_cnt"))
51		goto out;
52	ASSERT_MEMEQ(libbpf_line_info, line_info, libbbpf_line_info_cnt * sizeof(*line_info),
53		     "line_info");
54	ASSERT_MEMEQ(libbpf_func_info, func_info, libbbpf_func_info_cnt * sizeof(*func_info),
55		     "func_info");
56out:
57	test_btf_ext__destroy(skel);
58}
59
60void test_btf_ext(void)
61{
62	if (test__start_subtest("line_func_info"))
63		subtest_line_func_info();
64}