1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
|
// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2024, Oracle and/or its affiliates. */
#include <test_progs.h>
#include <bpf/btf.h>
#include "btf_helpers.h"
#include "bpf/libbpf_internal.h"
struct field_data {
__u32 ids[5];
const char *strs[5];
} fields[] = {
{ .ids = {}, .strs = {} },
{ .ids = {}, .strs = { "int" } },
{ .ids = {}, .strs = { "int64" } },
{ .ids = { 1 }, .strs = { "" } },
{ .ids = { 2, 1 }, .strs = { "" } },
{ .ids = { 3, 1 }, .strs = { "s1", "f1", "f2" } },
{ .ids = { 1, 5 }, .strs = { "u1", "f1", "f2" } },
{ .ids = {}, .strs = { "e1", "v1", "v2" } },
{ .ids = {}, .strs = { "fw1" } },
{ .ids = { 1 }, .strs = { "t" } },
{ .ids = { 2 }, .strs = { "" } },
{ .ids = { 1 }, .strs = { "" } },
{ .ids = { 3 }, .strs = { "" } },
{ .ids = { 1, 1, 3 }, .strs = { "", "p1", "p2" } },
{ .ids = { 13 }, .strs = { "func" } },
{ .ids = { 1 }, .strs = { "var1" } },
{ .ids = { 3 }, .strs = { "var2" } },
{ .ids = {}, .strs = { "float" } },
{ .ids = { 11 }, .strs = { "decltag" } },
{ .ids = { 6 }, .strs = { "typetag" } },
{ .ids = {}, .strs = { "e64", "eval1", "eval2", "eval3" } },
{ .ids = { 15, 16 }, .strs = { "datasec1" } }
};
/* Fabricate BTF with various types and check BTF field iteration finds types,
* strings expected.
*/
void test_btf_field_iter(void)
{
struct btf *btf = NULL;
int id;
btf = btf__new_empty();
if (!ASSERT_OK_PTR(btf, "empty_btf"))
return;
btf__add_int(btf, "int", 4, BTF_INT_SIGNED); /* [1] int */
btf__add_int(btf, "int64", 8, BTF_INT_SIGNED); /* [2] int64 */
btf__add_ptr(btf, 1); /* [3] int * */
btf__add_array(btf, 1, 2, 3); /* [4] int64[3] */
btf__add_struct(btf, "s1", 12); /* [5] struct s1 { */
btf__add_field(btf, "f1", 3, 0, 0); /* int *f1; */
btf__add_field(btf, "f2", 1, 0, 0); /* int f2; */
/* } */
btf__add_union(btf, "u1", 12); /* [6] union u1 { */
btf__add_field(btf, "f1", 1, 0, 0); /* int f1; */
btf__add_field(btf, "f2", 5, 0, 0); /* struct s1 f2; */
/* } */
btf__add_enum(btf, "e1", 4); /* [7] enum e1 { */
btf__add_enum_value(btf, "v1", 1); /* v1 = 1; */
btf__add_enum_value(btf, "v2", 2); /* v2 = 2; */
/* } */
btf__add_fwd(btf, "fw1", BTF_FWD_STRUCT); /* [8] struct fw1; */
btf__add_typedef(btf, "t", 1); /* [9] typedef int t; */
btf__add_volatile(btf, 2); /* [10] volatile int64; */
btf__add_const(btf, 1); /* [11] const int; */
btf__add_restrict(btf, 3); /* [12] restrict int *; */
btf__add_func_proto(btf, 1); /* [13] int (*)(int p1, int *p2); */
btf__add_func_param(btf, "p1", 1);
btf__add_func_param(btf, "p2", 3);
btf__add_func(btf, "func", BTF_FUNC_GLOBAL, 13);/* [14] int func(int p1, int *p2); */
btf__add_var(btf, "var1", BTF_VAR_STATIC, 1); /* [15] static int var1; */
btf__add_var(btf, "var2", BTF_VAR_STATIC, 3); /* [16] static int *var2; */
btf__add_float(btf, "float", 4); /* [17] float; */
btf__add_decl_tag(btf, "decltag", 11, -1); /* [18] decltag const int; */
btf__add_type_tag(btf, "typetag", 6); /* [19] typetag union u1; */
btf__add_enum64(btf, "e64", 8, true); /* [20] enum { */
btf__add_enum64_value(btf, "eval1", 1000); /* eval1 = 1000, */
btf__add_enum64_value(btf, "eval2", 2000); /* eval2 = 2000, */
btf__add_enum64_value(btf, "eval3", 3000); /* eval3 = 3000 */
/* } */
btf__add_datasec(btf, "datasec1", 12); /* [21] datasec datasec1 */
btf__add_datasec_var_info(btf, 15, 0, 4);
btf__add_datasec_var_info(btf, 16, 4, 8);
VALIDATE_RAW_BTF(
btf,
"[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
"[2] INT 'int64' size=8 bits_offset=0 nr_bits=64 encoding=SIGNED",
"[3] PTR '(anon)' type_id=1",
"[4] ARRAY '(anon)' type_id=2 index_type_id=1 nr_elems=3",
"[5] STRUCT 's1' size=12 vlen=2\n"
"\t'f1' type_id=3 bits_offset=0\n"
"\t'f2' type_id=1 bits_offset=0",
"[6] UNION 'u1' size=12 vlen=2\n"
"\t'f1' type_id=1 bits_offset=0\n"
"\t'f2' type_id=5 bits_offset=0",
"[7] ENUM 'e1' encoding=UNSIGNED size=4 vlen=2\n"
"\t'v1' val=1\n"
"\t'v2' val=2",
"[8] FWD 'fw1' fwd_kind=struct",
"[9] TYPEDEF 't' type_id=1",
"[10] VOLATILE '(anon)' type_id=2",
"[11] CONST '(anon)' type_id=1",
"[12] RESTRICT '(anon)' type_id=3",
"[13] FUNC_PROTO '(anon)' ret_type_id=1 vlen=2\n"
"\t'p1' type_id=1\n"
"\t'p2' type_id=3",
"[14] FUNC 'func' type_id=13 linkage=global",
"[15] VAR 'var1' type_id=1, linkage=static",
"[16] VAR 'var2' type_id=3, linkage=static",
"[17] FLOAT 'float' size=4",
"[18] DECL_TAG 'decltag' type_id=11 component_idx=-1",
"[19] TYPE_TAG 'typetag' type_id=6",
"[20] ENUM64 'e64' encoding=SIGNED size=8 vlen=3\n"
"\t'eval1' val=1000\n"
"\t'eval2' val=2000\n"
"\t'eval3' val=3000",
"[21] DATASEC 'datasec1' size=12 vlen=2\n"
"\ttype_id=15 offset=0 size=4\n"
"\ttype_id=16 offset=4 size=8");
for (id = 1; id < btf__type_cnt(btf); id++) {
struct btf_type *t = btf_type_by_id(btf, id);
struct btf_field_iter it_strs, it_ids;
int str_idx = 0, id_idx = 0;
__u32 *next_str, *next_id;
if (!ASSERT_OK_PTR(t, "btf_type_by_id"))
break;
if (!ASSERT_OK(btf_field_iter_init(&it_strs, t, BTF_FIELD_ITER_STRS),
"iter_init_strs"))
break;
if (!ASSERT_OK(btf_field_iter_init(&it_ids, t, BTF_FIELD_ITER_IDS),
"iter_init_ids"))
break;
while ((next_str = btf_field_iter_next(&it_strs))) {
const char *str = btf__str_by_offset(btf, *next_str);
if (!ASSERT_OK(strcmp(fields[id].strs[str_idx], str), "field_str_match"))
break;
str_idx++;
}
/* ensure no more strings are expected */
ASSERT_EQ(fields[id].strs[str_idx], NULL, "field_str_cnt");
while ((next_id = btf_field_iter_next(&it_ids))) {
if (!ASSERT_EQ(*next_id, fields[id].ids[id_idx], "field_id_match"))
break;
id_idx++;
}
/* ensure no more ids are expected */
ASSERT_EQ(fields[id].ids[id_idx], 0, "field_id_cnt");
}
btf__free(btf);
}
|
