1 // SPDX-License-Identifier: GPL-2.0
2 // Copyright (c) 2019 Facebook
3 
4 #include <linux/bpf.h>
5 #include <stdint.h>
6 #include <bpf/bpf_helpers.h>
7 #include <bpf/bpf_core_read.h>
8 
9 char _license[] SEC("license") = "GPL";
10 
11 struct {
12 	char in[256];
13 	char out[256];
14 } data = {};
15 
16 struct core_reloc_size_output {
17 	int int_sz;
18 	int struct_sz;
19 	int union_sz;
20 	int arr_sz;
21 	int arr_elem_sz;
22 	int ptr_sz;
23 	int enum_sz;
24 	int float_sz;
25 };
26 
27 struct core_reloc_size {
28 	int int_field;
29 	struct { int x; } struct_field;
30 	union { int x; } union_field;
31 	int arr_field[4];
32 	void *ptr_field;
33 	enum { VALUE = 123 } enum_field;
34 	float float_field;
35 };
36 
37 SEC("raw_tracepoint/sys_enter")
38 int test_core_size(void *ctx)
39 {
40 	struct core_reloc_size *in = (void *)&data.in;
41 	struct core_reloc_size_output *out = (void *)&data.out;
42 
43 	out->int_sz = bpf_core_field_size(in->int_field);
44 	out->struct_sz = bpf_core_field_size(in->struct_field);
45 	out->union_sz = bpf_core_field_size(in->union_field);
46 	out->arr_sz = bpf_core_field_size(in->arr_field);
47 	out->arr_elem_sz = bpf_core_field_size(in->arr_field[0]);
48 	out->ptr_sz = bpf_core_field_size(in->ptr_field);
49 	out->enum_sz = bpf_core_field_size(in->enum_field);
50 	out->float_sz = bpf_core_field_size(in->float_field);
51 
52 	return 0;
53 }
54 
55