[linux.git] / tools / testing / selftests / bpf / prog_tests / btf_write.c

// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2020 Facebook */
#include <test_progs.h>
#include <bpf/btf.h>
#include "btf_helpers.h"

static void gen_btf(struct btf *btf)
{
	const struct btf_var_secinfo *vi;
	const struct btf_type *t;
	const struct btf_member *m;
	const struct btf_enum *v;
	const struct btf_param *p;
	int id, err, str_off;

	str_off = btf__find_str(btf, "int");
	ASSERT_EQ(str_off, -ENOENT, "int_str_missing_off");

	str_off = btf__add_str(btf, "int");
	ASSERT_EQ(str_off, 1, "int_str_off");

	str_off = btf__find_str(btf, "int");
	ASSERT_EQ(str_off, 1, "int_str_found_off");

	/* BTF_KIND_INT */
	id = btf__add_int(btf, "int", 4,  BTF_INT_SIGNED);
	ASSERT_EQ(id, 1, "int_id");

	t = btf__type_by_id(btf, 1);
	/* should re-use previously added "int" string */
	ASSERT_EQ(t->name_off, str_off, "int_name_off");
	ASSERT_STREQ(btf__str_by_offset(btf, t->name_off), "int", "int_name");
	ASSERT_EQ(btf_kind(t), BTF_KIND_INT, "int_kind");
	ASSERT_EQ(t->size, 4, "int_sz");
	ASSERT_EQ(btf_int_encoding(t), BTF_INT_SIGNED, "int_enc");
	ASSERT_EQ(btf_int_bits(t), 32, "int_bits");
	ASSERT_STREQ(btf_type_raw_dump(btf, 1),
		     "[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED", "raw_dump");

	/* invalid int size */
	id = btf__add_int(btf, "bad sz int", 7, 0);
	ASSERT_ERR(id, "int_bad_sz");
	/* invalid encoding */
	id = btf__add_int(btf, "bad enc int", 4, 123);
	ASSERT_ERR(id, "int_bad_enc");
	/* NULL name */
	id = btf__add_int(btf, NULL, 4, 0);
	ASSERT_ERR(id, "int_bad_null_name");
	/* empty name */
	id = btf__add_int(btf, "", 4, 0);
	ASSERT_ERR(id, "int_bad_empty_name");

	/* PTR/CONST/VOLATILE/RESTRICT */
	id = btf__add_ptr(btf, 1);
	ASSERT_EQ(id, 2, "ptr_id");
	t = btf__type_by_id(btf, 2);
	ASSERT_EQ(btf_kind(t), BTF_KIND_PTR, "ptr_kind");
	ASSERT_EQ(t->type, 1, "ptr_type");
	ASSERT_STREQ(btf_type_raw_dump(btf, 2),
		     "[2] PTR '(anon)' type_id=1", "raw_dump");

	id = btf__add_const(btf, 5); /* points forward to restrict */
	ASSERT_EQ(id, 3, "const_id");
	t = btf__type_by_id(btf, 3);
	ASSERT_EQ(btf_kind(t), BTF_KIND_CONST, "const_kind");
	ASSERT_EQ(t->type, 5, "const_type");
	ASSERT_STREQ(btf_type_raw_dump(btf, 3),
		     "[3] CONST '(anon)' type_id=5", "raw_dump");

	id = btf__add_volatile(btf, 3);
	ASSERT_EQ(id, 4, "volatile_id");
	t = btf__type_by_id(btf, 4);
	ASSERT_EQ(btf_kind(t), BTF_KIND_VOLATILE, "volatile_kind");
	ASSERT_EQ(t->type, 3, "volatile_type");
	ASSERT_STREQ(btf_type_raw_dump(btf, 4),
		     "[4] VOLATILE '(anon)' type_id=3", "raw_dump");

	id = btf__add_restrict(btf, 4);
	ASSERT_EQ(id, 5, "restrict_id");
	t = btf__type_by_id(btf, 5);
	ASSERT_EQ(btf_kind(t), BTF_KIND_RESTRICT, "restrict_kind");
	ASSERT_EQ(t->type, 4, "restrict_type");
	ASSERT_STREQ(btf_type_raw_dump(btf, 5),
		     "[5] RESTRICT '(anon)' type_id=4", "raw_dump");

	/* ARRAY */
	id = btf__add_array(btf, 1, 2, 10); /* int *[10] */
	ASSERT_EQ(id, 6, "array_id");
	t = btf__type_by_id(btf, 6);
	ASSERT_EQ(btf_kind(t), BTF_KIND_ARRAY, "array_kind");
	ASSERT_EQ(btf_array(t)->index_type, 1, "array_index_type");
	ASSERT_EQ(btf_array(t)->type, 2, "array_elem_type");
	ASSERT_EQ(btf_array(t)->nelems, 10, "array_nelems");
	ASSERT_STREQ(btf_type_raw_dump(btf, 6),
		     "[6] ARRAY '(anon)' type_id=2 index_type_id=1 nr_elems=10", "raw_dump");

	/* STRUCT */
	err = btf__add_field(btf, "field", 1, 0, 0);
	ASSERT_ERR(err, "no_struct_field");
	id = btf__add_struct(btf, "s1", 8);
	ASSERT_EQ(id, 7, "struct_id");
	err = btf__add_field(btf, "f1", 1, 0, 0);
	ASSERT_OK(err, "f1_res");
	err = btf__add_field(btf, "f2", 1, 32, 16);
	ASSERT_OK(err, "f2_res");

	t = btf__type_by_id(btf, 7);
	ASSERT_STREQ(btf__str_by_offset(btf, t->name_off), "s1", "struct_name");
	ASSERT_EQ(btf_kind(t), BTF_KIND_STRUCT, "struct_kind");
	ASSERT_EQ(btf_vlen(t), 2, "struct_vlen");
	ASSERT_EQ(btf_kflag(t), true, "struct_kflag");
	ASSERT_EQ(t->size, 8, "struct_sz");
	m = btf_members(t) + 0;
	ASSERT_STREQ(btf__str_by_offset(btf, m->name_off), "f1", "f1_name");
	ASSERT_EQ(m->type, 1, "f1_type");
	ASSERT_EQ(btf_member_bit_offset(t, 0), 0, "f1_bit_off");
	ASSERT_EQ(btf_member_bitfield_size(t, 0), 0, "f1_bit_sz");
	m = btf_members(t) + 1;
	ASSERT_STREQ(btf__str_by_offset(btf, m->name_off), "f2", "f2_name");
	ASSERT_EQ(m->type, 1, "f2_type");
	ASSERT_EQ(btf_member_bit_offset(t, 1), 32, "f2_bit_off");
	ASSERT_EQ(btf_member_bitfield_size(t, 1), 16, "f2_bit_sz");
	ASSERT_STREQ(btf_type_raw_dump(btf, 7),
		     "[7] STRUCT 's1' size=8 vlen=2\n"
		     "\t'f1' type_id=1 bits_offset=0\n"
		     "\t'f2' type_id=1 bits_offset=32 bitfield_size=16", "raw_dump");

	/* UNION */
	id = btf__add_union(btf, "u1", 8);
	ASSERT_EQ(id, 8, "union_id");

	/* invalid, non-zero offset */
	err = btf__add_field(btf, "field", 1, 1, 0);
	ASSERT_ERR(err, "no_struct_field");

	err = btf__add_field(btf, "f1", 1, 0, 16);
	ASSERT_OK(err, "f1_res");

	t = btf__type_by_id(btf, 8);
	ASSERT_STREQ(btf__str_by_offset(btf, t->name_off), "u1", "union_name");
	ASSERT_EQ(btf_kind(t), BTF_KIND_UNION, "union_kind");
	ASSERT_EQ(btf_vlen(t), 1, "union_vlen");
	ASSERT_EQ(btf_kflag(t), true, "union_kflag");
	ASSERT_EQ(t->size, 8, "union_sz");
	m = btf_members(t) + 0;
	ASSERT_STREQ(btf__str_by_offset(btf, m->name_off), "f1", "f1_name");
	ASSERT_EQ(m->type, 1, "f1_type");
	ASSERT_EQ(btf_member_bit_offset(t, 0), 0, "f1_bit_off");
	ASSERT_EQ(btf_member_bitfield_size(t, 0), 16, "f1_bit_sz");
	ASSERT_STREQ(btf_type_raw_dump(btf, 8),
		     "[8] UNION 'u1' size=8 vlen=1\n"
		     "\t'f1' type_id=1 bits_offset=0 bitfield_size=16", "raw_dump");

	/* ENUM */
	id = btf__add_enum(btf, "e1", 4);
	ASSERT_EQ(id, 9, "enum_id");
	err = btf__add_enum_value(btf, "v1", 1);
	ASSERT_OK(err, "v1_res");
	err = btf__add_enum_value(btf, "v2", 2);
	ASSERT_OK(err, "v2_res");

	t = btf__type_by_id(btf, 9);
	ASSERT_STREQ(btf__str_by_offset(btf, t->name_off), "e1", "enum_name");
	ASSERT_EQ(btf_kind(t), BTF_KIND_ENUM, "enum_kind");
	ASSERT_EQ(btf_vlen(t), 2, "enum_vlen");
	ASSERT_EQ(t->size, 4, "enum_sz");
	v = btf_enum(t) + 0;
	ASSERT_STREQ(btf__str_by_offset(btf, v->name_off), "v1", "v1_name");
	ASSERT_EQ(v->val, 1, "v1_val");
	v = btf_enum(t) + 1;
	ASSERT_STREQ(btf__str_by_offset(btf, v->name_off), "v2", "v2_name");
	ASSERT_EQ(v->val, 2, "v2_val");
	ASSERT_STREQ(btf_type_raw_dump(btf, 9),
		     "[9] ENUM 'e1' size=4 vlen=2\n"
		     "\t'v1' val=1\n"
		     "\t'v2' val=2", "raw_dump");

	/* FWDs */
	id = btf__add_fwd(btf, "struct_fwd", BTF_FWD_STRUCT);
	ASSERT_EQ(id, 10, "struct_fwd_id");
	t = btf__type_by_id(btf, 10);
	ASSERT_STREQ(btf__str_by_offset(btf, t->name_off), "struct_fwd", "fwd_name");
	ASSERT_EQ(btf_kind(t), BTF_KIND_FWD, "fwd_kind");
	ASSERT_EQ(btf_kflag(t), 0, "fwd_kflag");
	ASSERT_STREQ(btf_type_raw_dump(btf, 10),
		     "[10] FWD 'struct_fwd' fwd_kind=struct", "raw_dump");

	id = btf__add_fwd(btf, "union_fwd", BTF_FWD_UNION);
	ASSERT_EQ(id, 11, "union_fwd_id");
	t = btf__type_by_id(btf, 11);
	ASSERT_STREQ(btf__str_by_offset(btf, t->name_off), "union_fwd", "fwd_name");
	ASSERT_EQ(btf_kind(t), BTF_KIND_FWD, "fwd_kind");
	ASSERT_EQ(btf_kflag(t), 1, "fwd_kflag");
	ASSERT_STREQ(btf_type_raw_dump(btf, 11),
		     "[11] FWD 'union_fwd' fwd_kind=union", "raw_dump");

	id = btf__add_fwd(btf, "enum_fwd", BTF_FWD_ENUM);
	ASSERT_EQ(id, 12, "enum_fwd_id");
	t = btf__type_by_id(btf, 12);
	ASSERT_STREQ(btf__str_by_offset(btf, t->name_off), "enum_fwd", "fwd_name");
	ASSERT_EQ(btf_kind(t), BTF_KIND_ENUM, "enum_fwd_kind");
	ASSERT_EQ(btf_vlen(t), 0, "enum_fwd_kind");
	ASSERT_EQ(t->size, 4, "enum_fwd_sz");
	ASSERT_STREQ(btf_type_raw_dump(btf, 12),
		     "[12] ENUM 'enum_fwd' size=4 vlen=0", "raw_dump");

	/* TYPEDEF */
	id = btf__add_typedef(btf, "typedef1", 1);
	ASSERT_EQ(id, 13, "typedef_fwd_id");
	t = btf__type_by_id(btf, 13);
	ASSERT_STREQ(btf__str_by_offset(btf, t->name_off), "typedef1", "typedef_name");
	ASSERT_EQ(btf_kind(t), BTF_KIND_TYPEDEF, "typedef_kind");
	ASSERT_EQ(t->type, 1, "typedef_type");
	ASSERT_STREQ(btf_type_raw_dump(btf, 13),
		     "[13] TYPEDEF 'typedef1' type_id=1", "raw_dump");

	/* FUNC & FUNC_PROTO */
	id = btf__add_func(btf, "func1", BTF_FUNC_GLOBAL, 15);
	ASSERT_EQ(id, 14, "func_id");
	t = btf__type_by_id(btf, 14);
	ASSERT_STREQ(btf__str_by_offset(btf, t->name_off), "func1", "func_name");
	ASSERT_EQ(t->type, 15, "func_type");
	ASSERT_EQ(btf_kind(t), BTF_KIND_FUNC, "func_kind");
	ASSERT_EQ(btf_vlen(t), BTF_FUNC_GLOBAL, "func_vlen");
	ASSERT_STREQ(btf_type_raw_dump(btf, 14),
		     "[14] FUNC 'func1' type_id=15 linkage=global", "raw_dump");

	id = btf__add_func_proto(btf, 1);
	ASSERT_EQ(id, 15, "func_proto_id");
	err = btf__add_func_param(btf, "p1", 1);
	ASSERT_OK(err, "p1_res");
	err = btf__add_func_param(btf, "p2", 2);
	ASSERT_OK(err, "p2_res");

	t = btf__type_by_id(btf, 15);
	ASSERT_EQ(btf_kind(t), BTF_KIND_FUNC_PROTO, "func_proto_kind");
	ASSERT_EQ(btf_vlen(t), 2, "func_proto_vlen");
	ASSERT_EQ(t->type, 1, "func_proto_ret_type");
	p = btf_params(t) + 0;
	ASSERT_STREQ(btf__str_by_offset(btf, p->name_off), "p1", "p1_name");
	ASSERT_EQ(p->type, 1, "p1_type");
	p = btf_params(t) + 1;
	ASSERT_STREQ(btf__str_by_offset(btf, p->name_off), "p2", "p2_name");
	ASSERT_EQ(p->type, 2, "p2_type");
	ASSERT_STREQ(btf_type_raw_dump(btf, 15),
		     "[15] FUNC_PROTO '(anon)' ret_type_id=1 vlen=2\n"
		     "\t'p1' type_id=1\n"
		     "\t'p2' type_id=2", "raw_dump");

	/* VAR */
	id = btf__add_var(btf, "var1", BTF_VAR_GLOBAL_ALLOCATED, 1);
	ASSERT_EQ(id, 16, "var_id");
	t = btf__type_by_id(btf, 16);
	ASSERT_STREQ(btf__str_by_offset(btf, t->name_off), "var1", "var_name");
	ASSERT_EQ(btf_kind(t), BTF_KIND_VAR, "var_kind");
	ASSERT_EQ(t->type, 1, "var_type");
	ASSERT_EQ(btf_var(t)->linkage, BTF_VAR_GLOBAL_ALLOCATED, "var_type");
	ASSERT_STREQ(btf_type_raw_dump(btf, 16),
		     "[16] VAR 'var1' type_id=1, linkage=global-alloc", "raw_dump");

	/* DATASECT */
	id = btf__add_datasec(btf, "datasec1", 12);
	ASSERT_EQ(id, 17, "datasec_id");
	err = btf__add_datasec_var_info(btf, 1, 4, 8);
	ASSERT_OK(err, "v1_res");

	t = btf__type_by_id(btf, 17);
	ASSERT_STREQ(btf__str_by_offset(btf, t->name_off), "datasec1", "datasec_name");
	ASSERT_EQ(t->size, 12, "datasec_sz");
	ASSERT_EQ(btf_kind(t), BTF_KIND_DATASEC, "datasec_kind");
	ASSERT_EQ(btf_vlen(t), 1, "datasec_vlen");
	vi = btf_var_secinfos(t) + 0;
	ASSERT_EQ(vi->type, 1, "v1_type");
	ASSERT_EQ(vi->offset, 4, "v1_off");
	ASSERT_EQ(vi->size, 8, "v1_sz");
	ASSERT_STREQ(btf_type_raw_dump(btf, 17),
		     "[17] DATASEC 'datasec1' size=12 vlen=1\n"
		     "\ttype_id=1 offset=4 size=8", "raw_dump");

	/* DECL_TAG */
	id = btf__add_decl_tag(btf, "tag1", 16, -1);
	ASSERT_EQ(id, 18, "tag_id");
	t = btf__type_by_id(btf, 18);
	ASSERT_STREQ(btf__str_by_offset(btf, t->name_off), "tag1", "tag_value");
	ASSERT_EQ(btf_kind(t), BTF_KIND_DECL_TAG, "tag_kind");
	ASSERT_EQ(t->type, 16, "tag_type");
	ASSERT_EQ(btf_decl_tag(t)->component_idx, -1, "tag_component_idx");
	ASSERT_STREQ(btf_type_raw_dump(btf, 18),
		     "[18] DECL_TAG 'tag1' type_id=16 component_idx=-1", "raw_dump");

	id = btf__add_decl_tag(btf, "tag2", 14, 1);
	ASSERT_EQ(id, 19, "tag_id");
	t = btf__type_by_id(btf, 19);
	ASSERT_STREQ(btf__str_by_offset(btf, t->name_off), "tag2", "tag_value");
	ASSERT_EQ(btf_kind(t), BTF_KIND_DECL_TAG, "tag_kind");
	ASSERT_EQ(t->type, 14, "tag_type");
	ASSERT_EQ(btf_decl_tag(t)->component_idx, 1, "tag_component_idx");
	ASSERT_STREQ(btf_type_raw_dump(btf, 19),
		     "[19] DECL_TAG 'tag2' type_id=14 component_idx=1", "raw_dump");

	/* TYPE_TAG */
	id = btf__add_type_tag(btf, "tag1", 1);
	ASSERT_EQ(id, 20, "tag_id");
	t = btf__type_by_id(btf, 20);
	ASSERT_STREQ(btf__str_by_offset(btf, t->name_off), "tag1", "tag_value");
	ASSERT_EQ(btf_kind(t), BTF_KIND_TYPE_TAG, "tag_kind");
	ASSERT_EQ(t->type, 1, "tag_type");
	ASSERT_STREQ(btf_type_raw_dump(btf, 20),
		     "[20] TYPE_TAG 'tag1' type_id=1", "raw_dump");
}

static void test_btf_add()
{
	struct btf *btf;

	btf = btf__new_empty();
	if (!ASSERT_OK_PTR(btf, "new_empty"))
		return;

	gen_btf(btf);

	VALIDATE_RAW_BTF(
		btf,
		"[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
		"[2] PTR '(anon)' type_id=1",
		"[3] CONST '(anon)' type_id=5",
		"[4] VOLATILE '(anon)' type_id=3",
		"[5] RESTRICT '(anon)' type_id=4",
		"[6] ARRAY '(anon)' type_id=2 index_type_id=1 nr_elems=10",
		"[7] STRUCT 's1' size=8 vlen=2\n"
		"\t'f1' type_id=1 bits_offset=0\n"
		"\t'f2' type_id=1 bits_offset=32 bitfield_size=16",
		"[8] UNION 'u1' size=8 vlen=1\n"
		"\t'f1' type_id=1 bits_offset=0 bitfield_size=16",
		"[9] ENUM 'e1' size=4 vlen=2\n"
		"\t'v1' val=1\n"
		"\t'v2' val=2",
		"[10] FWD 'struct_fwd' fwd_kind=struct",
		"[11] FWD 'union_fwd' fwd_kind=union",
		"[12] ENUM 'enum_fwd' size=4 vlen=0",
		"[13] TYPEDEF 'typedef1' type_id=1",
		"[14] FUNC 'func1' type_id=15 linkage=global",
		"[15] FUNC_PROTO '(anon)' ret_type_id=1 vlen=2\n"
		"\t'p1' type_id=1\n"
		"\t'p2' type_id=2",
		"[16] VAR 'var1' type_id=1, linkage=global-alloc",
		"[17] DATASEC 'datasec1' size=12 vlen=1\n"
		"\ttype_id=1 offset=4 size=8",
		"[18] DECL_TAG 'tag1' type_id=16 component_idx=-1",
		"[19] DECL_TAG 'tag2' type_id=14 component_idx=1",
		"[20] TYPE_TAG 'tag1' type_id=1");

	btf__free(btf);
}

static void test_btf_add_btf()
{
	struct btf *btf1 = NULL, *btf2 = NULL;
	int id;

	btf1 = btf__new_empty();
	if (!ASSERT_OK_PTR(btf1, "btf1"))
		return;

	btf2 = btf__new_empty();
	if (!ASSERT_OK_PTR(btf2, "btf2"))
		goto cleanup;

	gen_btf(btf1);
	gen_btf(btf2);

	id = btf__add_btf(btf1, btf2);
	if (!ASSERT_EQ(id, 21, "id"))
		goto cleanup;

	VALIDATE_RAW_BTF(
		btf1,
		"[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
		"[2] PTR '(anon)' type_id=1",
		"[3] CONST '(anon)' type_id=5",
		"[4] VOLATILE '(anon)' type_id=3",
		"[5] RESTRICT '(anon)' type_id=4",
		"[6] ARRAY '(anon)' type_id=2 index_type_id=1 nr_elems=10",
		"[7] STRUCT 's1' size=8 vlen=2\n"
		"\t'f1' type_id=1 bits_offset=0\n"
		"\t'f2' type_id=1 bits_offset=32 bitfield_size=16",
		"[8] UNION 'u1' size=8 vlen=1\n"
		"\t'f1' type_id=1 bits_offset=0 bitfield_size=16",
		"[9] ENUM 'e1' size=4 vlen=2\n"
		"\t'v1' val=1\n"
		"\t'v2' val=2",
		"[10] FWD 'struct_fwd' fwd_kind=struct",
		"[11] FWD 'union_fwd' fwd_kind=union",
		"[12] ENUM 'enum_fwd' size=4 vlen=0",
		"[13] TYPEDEF 'typedef1' type_id=1",
		"[14] FUNC 'func1' type_id=15 linkage=global",
		"[15] FUNC_PROTO '(anon)' ret_type_id=1 vlen=2\n"
		"\t'p1' type_id=1\n"
		"\t'p2' type_id=2",
		"[16] VAR 'var1' type_id=1, linkage=global-alloc",
		"[17] DATASEC 'datasec1' size=12 vlen=1\n"
		"\ttype_id=1 offset=4 size=8",
		"[18] DECL_TAG 'tag1' type_id=16 component_idx=-1",
		"[19] DECL_TAG 'tag2' type_id=14 component_idx=1",
		"[20] TYPE_TAG 'tag1' type_id=1",

		/* types appended from the second BTF */
		"[21] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
		"[22] PTR '(anon)' type_id=21",
		"[23] CONST '(anon)' type_id=25",
		"[24] VOLATILE '(anon)' type_id=23",
		"[25] RESTRICT '(anon)' type_id=24",
		"[26] ARRAY '(anon)' type_id=22 index_type_id=21 nr_elems=10",
		"[27] STRUCT 's1' size=8 vlen=2\n"
		"\t'f1' type_id=21 bits_offset=0\n"
		"\t'f2' type_id=21 bits_offset=32 bitfield_size=16",
		"[28] UNION 'u1' size=8 vlen=1\n"
		"\t'f1' type_id=21 bits_offset=0 bitfield_size=16",
		"[29] ENUM 'e1' size=4 vlen=2\n"
		"\t'v1' val=1\n"
		"\t'v2' val=2",
		"[30] FWD 'struct_fwd' fwd_kind=struct",
		"[31] FWD 'union_fwd' fwd_kind=union",
		"[32] ENUM 'enum_fwd' size=4 vlen=0",
		"[33] TYPEDEF 'typedef1' type_id=21",
		"[34] FUNC 'func1' type_id=35 linkage=global",
		"[35] FUNC_PROTO '(anon)' ret_type_id=21 vlen=2\n"
		"\t'p1' type_id=21\n"
		"\t'p2' type_id=22",
		"[36] VAR 'var1' type_id=21, linkage=global-alloc",
		"[37] DATASEC 'datasec1' size=12 vlen=1\n"
		"\ttype_id=21 offset=4 size=8",
		"[38] DECL_TAG 'tag1' type_id=36 component_idx=-1",
		"[39] DECL_TAG 'tag2' type_id=34 component_idx=1",
		"[40] TYPE_TAG 'tag1' type_id=21");

cleanup:
	btf__free(btf1);
	btf__free(btf2);
}

void test_btf_write()
{
	if (test__start_subtest("btf_add"))
		test_btf_add();
	if (test__start_subtest("btf_add_btf"))
		test_btf_add_btf();
}
Commit	Line	Data
9141f75a AN	1	// SPDX-License-Identifier: GPL-2.0
	2	/* Copyright (c) 2020 Facebook */
	3	#include <test_progs.h>
	4	#include <bpf/btf.h>
1306c980	5	#include "btf_helpers.h"
9141f75a	6
c65eb808 AN	7	static void gen_btf(struct btf *btf)
c65eb808 AN	8	{
9141f75a AN	9	const struct btf_var_secinfo *vi;
	10	const struct btf_type *t;
	11	const struct btf_member *m;
	12	const struct btf_enum *v;
	13	const struct btf_param *p;
9141f75a AN	14	int id, err, str_off;
9141f75a AN	15
9141f75a AN	16	str_off = btf__find_str(btf, "int");
	17	ASSERT_EQ(str_off, -ENOENT, "int_str_missing_off");
	18
	19	str_off = btf__add_str(btf, "int");
	20	ASSERT_EQ(str_off, 1, "int_str_off");
	21
	22	str_off = btf__find_str(btf, "int");
	23	ASSERT_EQ(str_off, 1, "int_str_found_off");
	24
	25	/* BTF_KIND_INT */
	26	id = btf__add_int(btf, "int", 4, BTF_INT_SIGNED);
	27	ASSERT_EQ(id, 1, "int_id");
	28
	29	t = btf__type_by_id(btf, 1);
	30	/* should re-use previously added "int" string */
	31	ASSERT_EQ(t->name_off, str_off, "int_name_off");
	32	ASSERT_STREQ(btf__str_by_offset(btf, t->name_off), "int", "int_name");
	33	ASSERT_EQ(btf_kind(t), BTF_KIND_INT, "int_kind");
	34	ASSERT_EQ(t->size, 4, "int_sz");
	35	ASSERT_EQ(btf_int_encoding(t), BTF_INT_SIGNED, "int_enc");
	36	ASSERT_EQ(btf_int_bits(t), 32, "int_bits");
1306c980 AN	37	ASSERT_STREQ(btf_type_raw_dump(btf, 1),
1306c980 AN	38	"[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED", "raw_dump");
9141f75a AN	39
	40	/* invalid int size */
	41	id = btf__add_int(btf, "bad sz int", 7, 0);
	42	ASSERT_ERR(id, "int_bad_sz");
	43	/* invalid encoding */
	44	id = btf__add_int(btf, "bad enc int", 4, 123);
	45	ASSERT_ERR(id, "int_bad_enc");
	46	/* NULL name */
	47	id = btf__add_int(btf, NULL, 4, 0);
	48	ASSERT_ERR(id, "int_bad_null_name");
	49	/* empty name */
	50	id = btf__add_int(btf, "", 4, 0);
	51	ASSERT_ERR(id, "int_bad_empty_name");
	52
	53	/* PTR/CONST/VOLATILE/RESTRICT */
	54	id = btf__add_ptr(btf, 1);
	55	ASSERT_EQ(id, 2, "ptr_id");
	56	t = btf__type_by_id(btf, 2);
	57	ASSERT_EQ(btf_kind(t), BTF_KIND_PTR, "ptr_kind");
	58	ASSERT_EQ(t->type, 1, "ptr_type");
1306c980 AN	59	ASSERT_STREQ(btf_type_raw_dump(btf, 2),
1306c980 AN	60	"[2] PTR '(anon)' type_id=1", "raw_dump");
9141f75a AN	61
	62	id = btf__add_const(btf, 5); /* points forward to restrict */
	63	ASSERT_EQ(id, 3, "const_id");
	64	t = btf__type_by_id(btf, 3);
	65	ASSERT_EQ(btf_kind(t), BTF_KIND_CONST, "const_kind");
	66	ASSERT_EQ(t->type, 5, "const_type");
1306c980 AN	67	ASSERT_STREQ(btf_type_raw_dump(btf, 3),
1306c980 AN	68	"[3] CONST '(anon)' type_id=5", "raw_dump");
9141f75a AN	69
	70	id = btf__add_volatile(btf, 3);
	71	ASSERT_EQ(id, 4, "volatile_id");
	72	t = btf__type_by_id(btf, 4);
	73	ASSERT_EQ(btf_kind(t), BTF_KIND_VOLATILE, "volatile_kind");
	74	ASSERT_EQ(t->type, 3, "volatile_type");
1306c980 AN	75	ASSERT_STREQ(btf_type_raw_dump(btf, 4),
1306c980 AN	76	"[4] VOLATILE '(anon)' type_id=3", "raw_dump");
9141f75a AN	77
	78	id = btf__add_restrict(btf, 4);
	79	ASSERT_EQ(id, 5, "restrict_id");
	80	t = btf__type_by_id(btf, 5);
	81	ASSERT_EQ(btf_kind(t), BTF_KIND_RESTRICT, "restrict_kind");
	82	ASSERT_EQ(t->type, 4, "restrict_type");
1306c980 AN	83	ASSERT_STREQ(btf_type_raw_dump(btf, 5),
1306c980 AN	84	"[5] RESTRICT '(anon)' type_id=4", "raw_dump");
9141f75a AN	85
	86	/* ARRAY */
	87	id = btf__add_array(btf, 1, 2, 10); /* int [10] /
	88	ASSERT_EQ(id, 6, "array_id");
	89	t = btf__type_by_id(btf, 6);
	90	ASSERT_EQ(btf_kind(t), BTF_KIND_ARRAY, "array_kind");
	91	ASSERT_EQ(btf_array(t)->index_type, 1, "array_index_type");
	92	ASSERT_EQ(btf_array(t)->type, 2, "array_elem_type");
	93	ASSERT_EQ(btf_array(t)->nelems, 10, "array_nelems");
1306c980 AN	94	ASSERT_STREQ(btf_type_raw_dump(btf, 6),
1306c980 AN	95	"[6] ARRAY '(anon)' type_id=2 index_type_id=1 nr_elems=10", "raw_dump");
9141f75a AN	96
	97	/* STRUCT */
	98	err = btf__add_field(btf, "field", 1, 0, 0);
	99	ASSERT_ERR(err, "no_struct_field");
	100	id = btf__add_struct(btf, "s1", 8);
	101	ASSERT_EQ(id, 7, "struct_id");
	102	err = btf__add_field(btf, "f1", 1, 0, 0);
	103	ASSERT_OK(err, "f1_res");
	104	err = btf__add_field(btf, "f2", 1, 32, 16);
	105	ASSERT_OK(err, "f2_res");
	106
	107	t = btf__type_by_id(btf, 7);
	108	ASSERT_STREQ(btf__str_by_offset(btf, t->name_off), "s1", "struct_name");
	109	ASSERT_EQ(btf_kind(t), BTF_KIND_STRUCT, "struct_kind");
	110	ASSERT_EQ(btf_vlen(t), 2, "struct_vlen");
	111	ASSERT_EQ(btf_kflag(t), true, "struct_kflag");
	112	ASSERT_EQ(t->size, 8, "struct_sz");
	113	m = btf_members(t) + 0;
	114	ASSERT_STREQ(btf__str_by_offset(btf, m->name_off), "f1", "f1_name");
	115	ASSERT_EQ(m->type, 1, "f1_type");
	116	ASSERT_EQ(btf_member_bit_offset(t, 0), 0, "f1_bit_off");
	117	ASSERT_EQ(btf_member_bitfield_size(t, 0), 0, "f1_bit_sz");
	118	m = btf_members(t) + 1;
	119	ASSERT_STREQ(btf__str_by_offset(btf, m->name_off), "f2", "f2_name");
	120	ASSERT_EQ(m->type, 1, "f2_type");
	121	ASSERT_EQ(btf_member_bit_offset(t, 1), 32, "f2_bit_off");
	122	ASSERT_EQ(btf_member_bitfield_size(t, 1), 16, "f2_bit_sz");
1306c980 AN	123	ASSERT_STREQ(btf_type_raw_dump(btf, 7),
	124	"[7] STRUCT 's1' size=8 vlen=2\n"
	125	"\t'f1' type_id=1 bits_offset=0\n"
	126	"\t'f2' type_id=1 bits_offset=32 bitfield_size=16", "raw_dump");
9141f75a AN	127
	128	/* UNION */
	129	id = btf__add_union(btf, "u1", 8);
	130	ASSERT_EQ(id, 8, "union_id");
	131
	132	/* invalid, non-zero offset */
	133	err = btf__add_field(btf, "field", 1, 1, 0);
	134	ASSERT_ERR(err, "no_struct_field");
	135
	136	err = btf__add_field(btf, "f1", 1, 0, 16);
	137	ASSERT_OK(err, "f1_res");
	138
	139	t = btf__type_by_id(btf, 8);
	140	ASSERT_STREQ(btf__str_by_offset(btf, t->name_off), "u1", "union_name");
	141	ASSERT_EQ(btf_kind(t), BTF_KIND_UNION, "union_kind");
	142	ASSERT_EQ(btf_vlen(t), 1, "union_vlen");
	143	ASSERT_EQ(btf_kflag(t), true, "union_kflag");
	144	ASSERT_EQ(t->size, 8, "union_sz");
	145	m = btf_members(t) + 0;
	146	ASSERT_STREQ(btf__str_by_offset(btf, m->name_off), "f1", "f1_name");
	147	ASSERT_EQ(m->type, 1, "f1_type");
	148	ASSERT_EQ(btf_member_bit_offset(t, 0), 0, "f1_bit_off");
	149	ASSERT_EQ(btf_member_bitfield_size(t, 0), 16, "f1_bit_sz");
1306c980 AN	150	ASSERT_STREQ(btf_type_raw_dump(btf, 8),
	151	"[8] UNION 'u1' size=8 vlen=1\n"
	152	"\t'f1' type_id=1 bits_offset=0 bitfield_size=16", "raw_dump");
9141f75a AN	153
	154	/* ENUM */
	155	id = btf__add_enum(btf, "e1", 4);
	156	ASSERT_EQ(id, 9, "enum_id");
	157	err = btf__add_enum_value(btf, "v1", 1);
	158	ASSERT_OK(err, "v1_res");
	159	err = btf__add_enum_value(btf, "v2", 2);
	160	ASSERT_OK(err, "v2_res");
	161
	162	t = btf__type_by_id(btf, 9);
	163	ASSERT_STREQ(btf__str_by_offset(btf, t->name_off), "e1", "enum_name");
	164	ASSERT_EQ(btf_kind(t), BTF_KIND_ENUM, "enum_kind");
	165	ASSERT_EQ(btf_vlen(t), 2, "enum_vlen");
	166	ASSERT_EQ(t->size, 4, "enum_sz");
	167	v = btf_enum(t) + 0;
	168	ASSERT_STREQ(btf__str_by_offset(btf, v->name_off), "v1", "v1_name");
	169	ASSERT_EQ(v->val, 1, "v1_val");
	170	v = btf_enum(t) + 1;
	171	ASSERT_STREQ(btf__str_by_offset(btf, v->name_off), "v2", "v2_name");
	172	ASSERT_EQ(v->val, 2, "v2_val");
1306c980 AN	173	ASSERT_STREQ(btf_type_raw_dump(btf, 9),
	174	"[9] ENUM 'e1' size=4 vlen=2\n"
	175	"\t'v1' val=1\n"
	176	"\t'v2' val=2", "raw_dump");
9141f75a AN	177
	178	/* FWDs */
	179	id = btf__add_fwd(btf, "struct_fwd", BTF_FWD_STRUCT);
	180	ASSERT_EQ(id, 10, "struct_fwd_id");
	181	t = btf__type_by_id(btf, 10);
	182	ASSERT_STREQ(btf__str_by_offset(btf, t->name_off), "struct_fwd", "fwd_name");
	183	ASSERT_EQ(btf_kind(t), BTF_KIND_FWD, "fwd_kind");
	184	ASSERT_EQ(btf_kflag(t), 0, "fwd_kflag");
1306c980 AN	185	ASSERT_STREQ(btf_type_raw_dump(btf, 10),
1306c980 AN	186	"[10] FWD 'struct_fwd' fwd_kind=struct", "raw_dump");
9141f75a AN	187
	188	id = btf__add_fwd(btf, "union_fwd", BTF_FWD_UNION);
	189	ASSERT_EQ(id, 11, "union_fwd_id");
	190	t = btf__type_by_id(btf, 11);
	191	ASSERT_STREQ(btf__str_by_offset(btf, t->name_off), "union_fwd", "fwd_name");
	192	ASSERT_EQ(btf_kind(t), BTF_KIND_FWD, "fwd_kind");
	193	ASSERT_EQ(btf_kflag(t), 1, "fwd_kflag");
1306c980 AN	194	ASSERT_STREQ(btf_type_raw_dump(btf, 11),
1306c980 AN	195	"[11] FWD 'union_fwd' fwd_kind=union", "raw_dump");
9141f75a AN	196
	197	id = btf__add_fwd(btf, "enum_fwd", BTF_FWD_ENUM);
	198	ASSERT_EQ(id, 12, "enum_fwd_id");
	199	t = btf__type_by_id(btf, 12);
	200	ASSERT_STREQ(btf__str_by_offset(btf, t->name_off), "enum_fwd", "fwd_name");
	201	ASSERT_EQ(btf_kind(t), BTF_KIND_ENUM, "enum_fwd_kind");
	202	ASSERT_EQ(btf_vlen(t), 0, "enum_fwd_kind");
	203	ASSERT_EQ(t->size, 4, "enum_fwd_sz");
1306c980 AN	204	ASSERT_STREQ(btf_type_raw_dump(btf, 12),
1306c980 AN	205	"[12] ENUM 'enum_fwd' size=4 vlen=0", "raw_dump");
9141f75a AN	206
	207	/* TYPEDEF */
	208	id = btf__add_typedef(btf, "typedef1", 1);
	209	ASSERT_EQ(id, 13, "typedef_fwd_id");
	210	t = btf__type_by_id(btf, 13);
	211	ASSERT_STREQ(btf__str_by_offset(btf, t->name_off), "typedef1", "typedef_name");
	212	ASSERT_EQ(btf_kind(t), BTF_KIND_TYPEDEF, "typedef_kind");
	213	ASSERT_EQ(t->type, 1, "typedef_type");
1306c980 AN	214	ASSERT_STREQ(btf_type_raw_dump(btf, 13),
1306c980 AN	215	"[13] TYPEDEF 'typedef1' type_id=1", "raw_dump");
9141f75a AN	216
	217	/* FUNC & FUNC_PROTO */
	218	id = btf__add_func(btf, "func1", BTF_FUNC_GLOBAL, 15);
	219	ASSERT_EQ(id, 14, "func_id");
	220	t = btf__type_by_id(btf, 14);
	221	ASSERT_STREQ(btf__str_by_offset(btf, t->name_off), "func1", "func_name");
	222	ASSERT_EQ(t->type, 15, "func_type");
	223	ASSERT_EQ(btf_kind(t), BTF_KIND_FUNC, "func_kind");
	224	ASSERT_EQ(btf_vlen(t), BTF_FUNC_GLOBAL, "func_vlen");
1306c980 AN	225	ASSERT_STREQ(btf_type_raw_dump(btf, 14),
1306c980 AN	226	"[14] FUNC 'func1' type_id=15 linkage=global", "raw_dump");
9141f75a AN	227
	228	id = btf__add_func_proto(btf, 1);
	229	ASSERT_EQ(id, 15, "func_proto_id");
	230	err = btf__add_func_param(btf, "p1", 1);
	231	ASSERT_OK(err, "p1_res");
	232	err = btf__add_func_param(btf, "p2", 2);
	233	ASSERT_OK(err, "p2_res");
	234
	235	t = btf__type_by_id(btf, 15);
	236	ASSERT_EQ(btf_kind(t), BTF_KIND_FUNC_PROTO, "func_proto_kind");
	237	ASSERT_EQ(btf_vlen(t), 2, "func_proto_vlen");
	238	ASSERT_EQ(t->type, 1, "func_proto_ret_type");
	239	p = btf_params(t) + 0;
	240	ASSERT_STREQ(btf__str_by_offset(btf, p->name_off), "p1", "p1_name");
	241	ASSERT_EQ(p->type, 1, "p1_type");
	242	p = btf_params(t) + 1;
	243	ASSERT_STREQ(btf__str_by_offset(btf, p->name_off), "p2", "p2_name");
	244	ASSERT_EQ(p->type, 2, "p2_type");
1306c980 AN	245	ASSERT_STREQ(btf_type_raw_dump(btf, 15),
	246	"[15] FUNC_PROTO '(anon)' ret_type_id=1 vlen=2\n"
	247	"\t'p1' type_id=1\n"
	248	"\t'p2' type_id=2", "raw_dump");
9141f75a AN	249
	250	/* VAR */
	251	id = btf__add_var(btf, "var1", BTF_VAR_GLOBAL_ALLOCATED, 1);
	252	ASSERT_EQ(id, 16, "var_id");
	253	t = btf__type_by_id(btf, 16);
	254	ASSERT_STREQ(btf__str_by_offset(btf, t->name_off), "var1", "var_name");
	255	ASSERT_EQ(btf_kind(t), BTF_KIND_VAR, "var_kind");
	256	ASSERT_EQ(t->type, 1, "var_type");
	257	ASSERT_EQ(btf_var(t)->linkage, BTF_VAR_GLOBAL_ALLOCATED, "var_type");
1306c980 AN	258	ASSERT_STREQ(btf_type_raw_dump(btf, 16),
1306c980 AN	259	"[16] VAR 'var1' type_id=1, linkage=global-alloc", "raw_dump");
9141f75a AN	260
	261	/* DATASECT */
	262	id = btf__add_datasec(btf, "datasec1", 12);
	263	ASSERT_EQ(id, 17, "datasec_id");
	264	err = btf__add_datasec_var_info(btf, 1, 4, 8);
	265	ASSERT_OK(err, "v1_res");
	266
	267	t = btf__type_by_id(btf, 17);
	268	ASSERT_STREQ(btf__str_by_offset(btf, t->name_off), "datasec1", "datasec_name");
	269	ASSERT_EQ(t->size, 12, "datasec_sz");
	270	ASSERT_EQ(btf_kind(t), BTF_KIND_DATASEC, "datasec_kind");
	271	ASSERT_EQ(btf_vlen(t), 1, "datasec_vlen");
	272	vi = btf_var_secinfos(t) + 0;
	273	ASSERT_EQ(vi->type, 1, "v1_type");
	274	ASSERT_EQ(vi->offset, 4, "v1_off");
	275	ASSERT_EQ(vi->size, 8, "v1_sz");
1306c980 AN	276	ASSERT_STREQ(btf_type_raw_dump(btf, 17),
	277	"[17] DATASEC 'datasec1' size=12 vlen=1\n"
	278	"\ttype_id=1 offset=4 size=8", "raw_dump");
9141f75a	279
223f903e YS	280	/* DECL_TAG */
223f903e YS	281	id = btf__add_decl_tag(btf, "tag1", 16, -1);
71d29c2d YS	282	ASSERT_EQ(id, 18, "tag_id");
	283	t = btf__type_by_id(btf, 18);
	284	ASSERT_STREQ(btf__str_by_offset(btf, t->name_off), "tag1", "tag_value");
223f903e	285	ASSERT_EQ(btf_kind(t), BTF_KIND_DECL_TAG, "tag_kind");
71d29c2d	286	ASSERT_EQ(t->type, 16, "tag_type");
223f903e	287	ASSERT_EQ(btf_decl_tag(t)->component_idx, -1, "tag_component_idx");
71d29c2d	288	ASSERT_STREQ(btf_type_raw_dump(btf, 18),
223f903e	289	"[18] DECL_TAG 'tag1' type_id=16 component_idx=-1", "raw_dump");
71d29c2d	290
223f903e	291	id = btf__add_decl_tag(btf, "tag2", 14, 1);
71d29c2d YS	292	ASSERT_EQ(id, 19, "tag_id");
	293	t = btf__type_by_id(btf, 19);
	294	ASSERT_STREQ(btf__str_by_offset(btf, t->name_off), "tag2", "tag_value");
223f903e	295	ASSERT_EQ(btf_kind(t), BTF_KIND_DECL_TAG, "tag_kind");
71d29c2d	296	ASSERT_EQ(t->type, 14, "tag_type");
223f903e	297	ASSERT_EQ(btf_decl_tag(t)->component_idx, 1, "tag_component_idx");
71d29c2d	298	ASSERT_STREQ(btf_type_raw_dump(btf, 19),
223f903e	299	"[19] DECL_TAG 'tag2' type_id=14 component_idx=1", "raw_dump");
0dc85872 YS	300
	301	/* TYPE_TAG */
	302	id = btf__add_type_tag(btf, "tag1", 1);
	303	ASSERT_EQ(id, 20, "tag_id");
	304	t = btf__type_by_id(btf, 20);
	305	ASSERT_STREQ(btf__str_by_offset(btf, t->name_off), "tag1", "tag_value");
	306	ASSERT_EQ(btf_kind(t), BTF_KIND_TYPE_TAG, "tag_kind");
	307	ASSERT_EQ(t->type, 1, "tag_type");
	308	ASSERT_STREQ(btf_type_raw_dump(btf, 20),
	309	"[20] TYPE_TAG 'tag1' type_id=1", "raw_dump");
c65eb808 AN	310	}
	311
	312	static void test_btf_add()
	313	{
	314	struct btf *btf;
	315
	316	btf = btf__new_empty();
	317	if (!ASSERT_OK_PTR(btf, "new_empty"))
	318	return;
	319
	320	gen_btf(btf);
	321
	322	VALIDATE_RAW_BTF(
	323	btf,
	324	"[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
	325	"[2] PTR '(anon)' type_id=1",
	326	"[3] CONST '(anon)' type_id=5",
	327	"[4] VOLATILE '(anon)' type_id=3",
	328	"[5] RESTRICT '(anon)' type_id=4",
	329	"[6] ARRAY '(anon)' type_id=2 index_type_id=1 nr_elems=10",
	330	"[7] STRUCT 's1' size=8 vlen=2\n"
	331	"\t'f1' type_id=1 bits_offset=0\n"
	332	"\t'f2' type_id=1 bits_offset=32 bitfield_size=16",
	333	"[8] UNION 'u1' size=8 vlen=1\n"
	334	"\t'f1' type_id=1 bits_offset=0 bitfield_size=16",
	335	"[9] ENUM 'e1' size=4 vlen=2\n"
	336	"\t'v1' val=1\n"
	337	"\t'v2' val=2",
	338	"[10] FWD 'struct_fwd' fwd_kind=struct",
	339	"[11] FWD 'union_fwd' fwd_kind=union",
	340	"[12] ENUM 'enum_fwd' size=4 vlen=0",
	341	"[13] TYPEDEF 'typedef1' type_id=1",
	342	"[14] FUNC 'func1' type_id=15 linkage=global",
	343	"[15] FUNC_PROTO '(anon)' ret_type_id=1 vlen=2\n"
	344	"\t'p1' type_id=1\n"
	345	"\t'p2' type_id=2",
	346	"[16] VAR 'var1' type_id=1, linkage=global-alloc",
	347	"[17] DATASEC 'datasec1' size=12 vlen=1\n"
	348	"\ttype_id=1 offset=4 size=8",
223f903e	349	"[18] DECL_TAG 'tag1' type_id=16 component_idx=-1",
0dc85872 YS	350	"[19] DECL_TAG 'tag2' type_id=14 component_idx=1",
0dc85872 YS	351	"[20] TYPE_TAG 'tag1' type_id=1");
71d29c2d	352
9141f75a AN	353	btf__free(btf);
9141f75a AN	354	}
c65eb808	355
9d057872 AN	356	static void test_btf_add_btf()
	357	{
	358	struct btf btf1 = NULL, btf2 = NULL;
	359	int id;
	360
	361	btf1 = btf__new_empty();
	362	if (!ASSERT_OK_PTR(btf1, "btf1"))
	363	return;
	364
	365	btf2 = btf__new_empty();
	366	if (!ASSERT_OK_PTR(btf2, "btf2"))
	367	goto cleanup;
	368
	369	gen_btf(btf1);
	370	gen_btf(btf2);
	371
	372	id = btf__add_btf(btf1, btf2);
0dc85872	373	if (!ASSERT_EQ(id, 21, "id"))
9d057872 AN	374	goto cleanup;
	375
	376	VALIDATE_RAW_BTF(
	377	btf1,
	378	"[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
	379	"[2] PTR '(anon)' type_id=1",
	380	"[3] CONST '(anon)' type_id=5",
	381	"[4] VOLATILE '(anon)' type_id=3",
	382	"[5] RESTRICT '(anon)' type_id=4",
	383	"[6] ARRAY '(anon)' type_id=2 index_type_id=1 nr_elems=10",
	384	"[7] STRUCT 's1' size=8 vlen=2\n"
	385	"\t'f1' type_id=1 bits_offset=0\n"
	386	"\t'f2' type_id=1 bits_offset=32 bitfield_size=16",
	387	"[8] UNION 'u1' size=8 vlen=1\n"
	388	"\t'f1' type_id=1 bits_offset=0 bitfield_size=16",
	389	"[9] ENUM 'e1' size=4 vlen=2\n"
	390	"\t'v1' val=1\n"
	391	"\t'v2' val=2",
	392	"[10] FWD 'struct_fwd' fwd_kind=struct",
	393	"[11] FWD 'union_fwd' fwd_kind=union",
	394	"[12] ENUM 'enum_fwd' size=4 vlen=0",
	395	"[13] TYPEDEF 'typedef1' type_id=1",
	396	"[14] FUNC 'func1' type_id=15 linkage=global",
	397	"[15] FUNC_PROTO '(anon)' ret_type_id=1 vlen=2\n"
	398	"\t'p1' type_id=1\n"
	399	"\t'p2' type_id=2",
	400	"[16] VAR 'var1' type_id=1, linkage=global-alloc",
	401	"[17] DATASEC 'datasec1' size=12 vlen=1\n"
	402	"\ttype_id=1 offset=4 size=8",
223f903e YS	403	"[18] DECL_TAG 'tag1' type_id=16 component_idx=-1",
223f903e YS	404	"[19] DECL_TAG 'tag2' type_id=14 component_idx=1",
0dc85872	405	"[20] TYPE_TAG 'tag1' type_id=1",
9d057872 AN	406
9d057872 AN	407	/* types appended from the second BTF */
0dc85872 YS	408	"[21] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
	409	"[22] PTR '(anon)' type_id=21",
	410	"[23] CONST '(anon)' type_id=25",
	411	"[24] VOLATILE '(anon)' type_id=23",
	412	"[25] RESTRICT '(anon)' type_id=24",
	413	"[26] ARRAY '(anon)' type_id=22 index_type_id=21 nr_elems=10",
	414	"[27] STRUCT 's1' size=8 vlen=2\n"
	415	"\t'f1' type_id=21 bits_offset=0\n"
	416	"\t'f2' type_id=21 bits_offset=32 bitfield_size=16",
	417	"[28] UNION 'u1' size=8 vlen=1\n"
	418	"\t'f1' type_id=21 bits_offset=0 bitfield_size=16",
	419	"[29] ENUM 'e1' size=4 vlen=2\n"
9d057872 AN	420	"\t'v1' val=1\n"
9d057872 AN	421	"\t'v2' val=2",
0dc85872 YS	422	"[30] FWD 'struct_fwd' fwd_kind=struct",
	423	"[31] FWD 'union_fwd' fwd_kind=union",
	424	"[32] ENUM 'enum_fwd' size=4 vlen=0",
	425	"[33] TYPEDEF 'typedef1' type_id=21",
	426	"[34] FUNC 'func1' type_id=35 linkage=global",
	427	"[35] FUNC_PROTO '(anon)' ret_type_id=21 vlen=2\n"
	428	"\t'p1' type_id=21\n"
	429	"\t'p2' type_id=22",
	430	"[36] VAR 'var1' type_id=21, linkage=global-alloc",
	431	"[37] DATASEC 'datasec1' size=12 vlen=1\n"
	432	"\ttype_id=21 offset=4 size=8",
	433	"[38] DECL_TAG 'tag1' type_id=36 component_idx=-1",
	434	"[39] DECL_TAG 'tag2' type_id=34 component_idx=1",
	435	"[40] TYPE_TAG 'tag1' type_id=21");
9d057872 AN	436
	437	cleanup:
	438	btf__free(btf1);
	439	btf__free(btf2);
	440	}
	441
c65eb808 AN	442	void test_btf_write()
	443	{
	444	if (test__start_subtest("btf_add"))
	445	test_btf_add();
9d057872 AN	446	if (test__start_subtest("btf_add_btf"))
9d057872 AN	447	test_btf_add_btf();
c65eb808	448	}