// 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);
}
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