// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2020 Facebook */
#include <test_progs.h>
#include <bpf/btf.h>
#include "btf_helpers.h"
static void test_split_simple() {
const struct btf_type *t;
struct btf *btf1, *btf2;
int str_off, err;
btf1 = btf__new_empty();
if (!ASSERT_OK_PTR(btf1, "empty_main_btf"))
return;
btf__set_pointer_size(btf1, 8); /* enforce 64-bit arch */
btf__add_int(btf1, "int", 4, BTF_INT_SIGNED); /* [1] int */
btf__add_ptr(btf1, 1); /* [2] ptr to int */
btf__add_struct(btf1, "s1", 4); /* [3] struct s1 { */
btf__add_field(btf1, "f1", 1, 0, 0); /* int f1; */
/* } */
VALIDATE_RAW_BTF(
btf1,
"[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
"[2] PTR '(anon)' type_id=1",
"[3] STRUCT 's1' size=4 vlen=1\n"
"\t'f1' type_id=1 bits_offset=0");
ASSERT_STREQ(btf_type_c_dump(btf1), "\
struct s1 {\n\
int f1;\n\
};\n\n", "c_dump");
btf2 = btf__new_empty_split(btf1);
if (!ASSERT_OK_PTR(btf2, "empty_split_btf"))
goto cleanup;
/* pointer size should be "inherited" from main BTF */
ASSERT_EQ(btf__pointer_size(btf2), 8, "inherit_ptr_sz");
str_off = btf__find_str(btf2, "int");
ASSERT_NEQ(str_off, -ENOENT, "str_int_missing");
t = btf__type_by_id(btf2, 1);
if (!ASSERT_OK_PTR(t, "int_type"))
goto cleanup;
ASSERT_EQ(btf_is_int(t), true, "int_kind");
ASSERT_STREQ(btf__str_by_offset(btf2, t->name_off), "int", "int_name");
btf__add_struct(btf2, "s2", 16); /* [4] struct s2 { */
btf__add_field(btf2, "f1", 6, 0, 0); /* struct s1 f1; */
btf__add_field(btf2, "f2", 5, 32, 0); /* int f2; */
btf__add_field(btf2, "f3", 2, 64, 0); /* int *f3; */
/* } */
/* duplicated int */
btf__add_int(btf2, "int", 4, BTF_INT_SIGNED); /* [5] int */
/* duplicated struct s1 */
btf__add_struct(btf2, "s1", 4); /* [6] struct s1 { */
btf__add_field(btf2, "f1", 5, 0, 0); /* int f1; */
/* } */
VALIDATE_RAW_BTF(
btf2,
"[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
"[2] PTR '(anon)' type_id=1",
"[3] STRUCT 's1' size=4 vlen=1\n"
"\t'f1' type_id=1 bits_offset=0",
"[4] STRUCT 's2' size=16 vlen=3\n"
"\t'f1' type_id=6 bits_offset=0\n"
"\t'f2' type_id=5 bits_offset=32\n"
"\t'f3' type_id=2 bits_offset=64",
"[5] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
"[6] STRUCT 's1' size=4 vlen=1\n"
"\t'f1' type_id=5 bits_offset=0");
ASSERT_STREQ(btf_type_c_dump(btf2), "\
struct s1 {\n\
int f1;\n\
};\n\
\n\
struct s1___2 {\n\
int f1;\n\
};\n\
\n\
struct s2 {\n\
struct s1___2 f1;\n\
int f2;\n\
int *f3;\n\
};\n\n", "c_dump");
err = btf__dedup(btf2, NULL);
if (!ASSERT_OK(err, "btf_dedup"))
goto cleanup;
VALIDATE_RAW_BTF(
btf2,
"[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
"[2] PTR '(anon)' type_id=1",
"[3] STRUCT 's1' size=4 vlen=1\n"
"\t'f1' type_id=1 bits_offset=0",
"[4] STRUCT 's2' size=16 vlen=3\n"
"\t'f1' type_id=3 bits_offset=0\n"
"\t'f2' type_id=1 bits_offset=32\n"
"\t'f3' type_id=2 bits_offset=64");
ASSERT_STREQ(btf_type_c_dump(btf2), "\
struct s1 {\n\
int f1;\n\
};\n\
\n\
struct s2 {\n\
struct s1 f1;\n\
int f2;\n\
int *f3;\n\
};\n\n", "c_dump");
cleanup:
btf__free(btf2);
btf__free(btf1);
}
static void test_split_fwd_resolve() {
struct btf *btf1, *btf2;
int err;
btf1 = btf__new_empty();
if (!ASSERT_OK_PTR(btf1, "empty_main_btf"))
return;
btf__set_pointer_size(btf1, 8); /* enforce 64-bit arch */
btf__add_int(btf1, "int", 4, BTF_INT_SIGNED); /* [1] int */
btf__add_ptr(btf1, 4); /* [2] ptr to struct s1 */
btf__add_ptr(btf1, 5); /* [3] ptr to struct s2 */
btf__add_struct(btf1, "s1", 16); /* [4] struct s1 { */
btf__add_field(btf1, "f1", 2, 0, 0); /* struct s1 *f1; */
btf__add_field(btf1, "f2", 3, 64, 0); /* struct s2 *f2; */
/* } */
btf__add_struct(btf1, "s2", 4); /* [5] struct s2 { */
btf__add_field(btf1, "f1", 1, 0, 0); /* int f1; */
/* } */
/* keep this not a part of type the graph to test btf_dedup_resolve_fwds */
btf__add_struct(btf1, "s3", 4); /* [6] struct s3 { */
btf__add_field(btf1, "f1", 1, 0, 0); /* int f1; */
/* } */
VALIDATE_RAW_BTF(
btf1,
"[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
"[2] PTR '(anon)' type_id=4",
"[3] PTR '(anon)' type_id=5",
"[4] STRUCT 's1' size=16 vlen=2\n"
"\t'f1' type_id=2 bits_offset=0\n"
"\t'f2' type_id=3 bits_offset=64",
"[5] STRUCT 's2' size=4 vlen=1\n"
"\t'f1' type_id=1 bits_offset=0",
"[6] STRUCT 's3' size=4 vlen=1\n"
"\t'f1' type_id=1 bits_offset=0");
btf2 = btf__new_empty_split(btf1);
if (!ASSERT_OK_PTR(btf2, "empty_split_btf"))
goto cleanup;
btf__add_int(btf2, "int", 4, BTF_INT_SIGNED); /* [7] int */
btf__add_ptr(btf2, 11); /* [8] ptr to struct s1 */
btf__add_fwd(btf2, "s2", BTF_FWD_STRUCT); /* [9] fwd for struct s2 */
btf__add_ptr(btf2, 9); /* [10] ptr to fwd struct s2 */
btf__add_struct(btf2, "s1", 16); /* [11] struct s1 { */
btf__add_field(btf2, "f1", 8, 0, 0); /* struct s1 *f1; */
btf__add_field(btf2, "f2", 10, 64, 0); /* struct s2 *f2; */
/* } */
btf__add_fwd(btf2, "s3", BTF_FWD_STRUCT); /* [12] fwd for struct s3 */
btf__add_ptr(btf2, 12); /* [13] ptr to struct s1 */
VALIDATE_RAW_BTF(
btf2,
"[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
"[2] PTR '(anon)' type_id=4",
"[3] PTR '(anon)' type_id=5",
"[4] STRUCT 's1' size=16 vlen=2\n"
"\t'f1' type_id=2 bits_offset=0\n"
"\t'f2' type_id=3 bits_offset=64",
"[5] STRUCT 's2' size=4 vlen=1\n"
"\t'f1' type_id=1 bits_offset=0",
"[6] STRUCT 's3' size=4 vlen=1\n"
"\t'f1' type_id=1 bits_offset=0",
"[7] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
"[8] PTR '(anon)' type_id=11",
"[9] FWD 's2' fwd_kind=struct",
"[10] PTR '(anon)' type_id=9",
"[11] STRUCT 's1' size=16 vlen=2\n"
"\t'f1' type_id=8 bits_offset=0\n"
"\t'f2' type_id=10 bits_offset=64",
"[12] FWD 's3' fwd_kind=struct",
"[13] PTR '(anon)' type_id=12");
err = btf__dedup(btf2, NULL);
if (!ASSERT_OK(err, "btf_dedup"))
goto cleanup;
VALIDATE_RAW_BTF(
btf2,
"[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
"[2] PTR '(anon)' type_id=4",
"[3] PTR '(anon)' type_id=5",
"[4] STRUCT 's1' size=16 vlen=2\n"
"\t'f1' type_id=2 bits_offset=0\n"
"\t'f2' type_id=3 bits_offset=64",
"[5] STRUCT 's2' size=4 vlen=1\n"
"\t'f1' type_id=1 bits_offset=0",
"[6] STRUCT 's3' size=4 vlen=1\n"
"\t'f1' type_id=1 bits_offset=0",
"[7] PTR '(anon)' type_id=6");
cleanup:
btf__free(btf2);
btf__free(btf1);
}
static void test_split_struct_duped() {
struct btf *btf1, *btf2;
int err;
btf1 = btf__new_empty();
if (!ASSERT_OK_PTR(btf1, "empty_main_btf"))
return;
btf__set_pointer_size(btf1, 8); /* enforce 64-bit arch */
btf__add_int(btf1, "int", 4, BTF_INT_SIGNED); /* [1] int */
btf__add_ptr(btf1, 5); /* [2] ptr to struct s1 */
btf__add_fwd(btf1, "s2", BTF_FWD_STRUCT); /* [3] fwd for struct s2 */
btf__add_ptr(btf1, 3); /* [4] ptr to fwd struct s2 */
btf__add_struct(btf1, "s1", 16); /* [5] struct s1 { */
btf__add_field(btf1, "f1", 2, 0, 0); /* struct s1 *f1; */
btf__add_field(btf1, "f2", 4, 64, 0); /* struct s2 *f2; */
/* } */
VALIDATE_RAW_BTF(
btf1,
"[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
"[2] PTR '(anon)' type_id=5",
"[3] FWD 's2' fwd_kind=struct",
"[4] PTR '(anon)' type_id=3",
"[5] STRUCT 's1' size=16 vlen=2\n"
"\t'f1' type_id=2 bits_offset=0\n"
"\t'f2' type_id=4 bits_offset=64");
btf2 = btf__new_empty_split(btf1);
if (!ASSERT_OK_PTR(btf2, "empty_split_btf"))
goto cleanup;
btf__add_int(btf2, "int", 4, BTF_INT_SIGNED); /* [6] int */
btf__add_ptr(btf2, 10); /* [7] ptr to struct s1 */
btf__add_fwd(btf2, "s2", BTF_FWD_STRUCT); /* [8] fwd for struct s2 */
btf__add_ptr(btf2, 11); /* [9] ptr to struct s2 */
btf__add_struct(btf2, "s1", 16); /* [10] struct s1 { */
btf__add_field(btf2, "f1", 7, 0, 0); /* struct s1 *f1; */
btf__add_field(btf2, "f2", 9, 64, 0); /* struct s2 *f2; */
/* } */
btf__add_struct(btf2, "s2", 40); /* [11] struct s2 { */
btf__add_field(btf2, "f1", 7, 0, 0); /* struct s1 *f1; */
btf__add_field(btf2, "f2", 9, 64, 0); /* struct s2 *f2; */
btf__add_field(btf2, "f3", 6, 128, 0); /* int f3; */
btf__add_field(btf2, "f4", 10, 192, 0); /* struct s1 f4; */
/* } */
btf__add_ptr(btf2, 8); /* [12] ptr to fwd struct s2 */
btf__add_struct(btf2, "s3", 8); /* [13] struct s3 { */
btf__add_field(btf2, "f1", 12, 0, 0); /* struct s2 *f1; (fwd) */
/* } */
VALIDATE_RAW_BTF(
btf2,
"[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
"[2] PTR '(anon)' type_id=5",
"[3] FWD 's2' fwd_kind=struct",
"[4] PTR '(anon)' type_id=3",
"[5] STRUCT 's1' size=16 vlen=2\n"
"\t'f1' type_id=2 bits_offset=0\n"
"\t'f2' type_id=4 bits_offset=64",
"[6] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
"[7] PTR '(anon)' type_id=10",
"[8] FWD 's2' fwd_kind=struct",
"[9] PTR '(anon)' type_id=11",
"[10] STRUCT 's1' size=16 vlen=2\n"
"\t'f1' type_id=7 bits_offset=0\n"
"\t'f2' type_id=9 bits_offset=64",
"[11] STRUCT 's2' size=40 vlen=4\n"
"\t'f1' type_id=7 bits_offset=0\n"
"\t'f2' type_id=9 bits_offset=64\n"
"\t'f3' type_id=6 bits_offset=128\n"
"\t'f4' type_id=10 bits_offset=192",
"[12] PTR '(anon)' type_id=8",
"[13] STRUCT 's3' size=8 vlen=1\n"
"\t'f1' type_id=12 bits_offset=0");
err = btf__dedup(btf2, NULL);
if (!ASSERT_OK(err, "btf_dedup"))
goto cleanup;
VALIDATE_RAW_BTF(
btf2,
"[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
"[2] PTR '(anon)' type_id=5",
"[3] FWD 's2' fwd_kind=struct",
"[4] PTR '(anon)' type_id=3",
"[5] STRUCT 's1' size=16 vlen=2\n"
"\t'f1' type_id=2 bits_offset=0\n"
"\t'f2' type_id=4 bits_offset=64",
"[6] PTR '(anon)' type_id=8",
"[7] PTR '(anon)' type_id=9",
"[8] STRUCT 's1' size=16 vlen=2\n"
"\t'f1' type_id=6 bits_offset=0\n"
"\t'f2' type_id=7 bits_offset=64",
"[9] STRUCT 's2' size=40 vlen=4\n"
"\t'f1' type_id=6 bits_offset=0\n"
"\t'f2' type_id=7 bits_offset=64\n"
"\t'f3' type_id=1 bits_offset=128\n"
"\t'f4' type_id=8 bits_offset=192",
"[10] STRUCT 's3' size=8 vlen=1\n"
"\t'f1' type_id=7 bits_offset=0");
cleanup:
btf__free(btf2);
btf__free(btf1);
}
static void btf_add_dup_struct_in_cu(struct btf *btf, int start_id)
{
#define ID(n) (start_id + n)
btf__set_pointer_size(btf, 8); /* enforce 64-bit arch */
btf__add_int(btf, "int", 4, BTF_INT_SIGNED); /* [1] int */
btf__add_struct(btf, "s", 8); /* [2] struct s { */
btf__add_field(btf, "a", ID(3), 0, 0); /* struct anon a; */
btf__add_field(btf, "b", ID(4), 0, 0); /* struct anon b; */
/* } */
btf__add_struct(btf, "(anon)", 8); /* [3] struct anon { */
btf__add_field(btf, "f1", ID(1), 0, 0); /* int f1; */
btf__add_field(btf, "f2", ID(1), 32, 0); /* int f2; */
/* } */
btf__add_struct(btf, "(anon)", 8); /* [4] struct anon { */
btf__add_field(btf, "f1", ID(1), 0, 0); /* int f1; */
btf__add_field(btf, "f2", ID(1), 32, 0); /* int f2; */
/* } */
#undef ID
}
static void test_split_dup_struct_in_cu()
{
struct btf *btf1, *btf2 = NULL;
int err;
/* generate the base data.. */
btf1 = btf__new_empty();
if (!ASSERT_OK_PTR(btf1, "empty_main_btf"))
return;
btf_add_dup_struct_in_cu(btf1, 0);
VALIDATE_RAW_BTF(
btf1,
"[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
"[2] STRUCT 's' size=8 vlen=2\n"
"\t'a' type_id=3 bits_offset=0\n"
"\t'b' type_id=4 bits_offset=0",
"[3] STRUCT '(anon)' size=8 vlen=2\n"
"\t'f1' type_id=1 bits_offset=0\n"
"\t'f2' type_id=1 bits_offset=32",
"[4] STRUCT '(anon)' size=8 vlen=2\n"
"\t'f1' type_id=1 bits_offset=0\n"
"\t'f2' type_id=1 bits_offset=32");
/* ..dedup them... */
err = btf__dedup(btf1, NULL);
if (!ASSERT_OK(err, "btf_dedup"))
goto cleanup;
VALIDATE_RAW_BTF(
btf1,
"[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
"[2] STRUCT 's' size=8 vlen=2\n"
"\t'a' type_id=3 bits_offset=0\n"
"\t'b' type_id=3 bits_offset=0",
"[3] STRUCT '(anon)' size=8 vlen=2\n"
"\t'f1' type_id=1 bits_offset=0\n"
"\t'f2' type_id=1 bits_offset=32");
/* and add the same data on top of it */
btf2 = btf__new_empty_split(btf1);
if (!ASSERT_OK_PTR(btf2, "empty_split_btf"))
goto cleanup;
btf_add_dup_struct_in_cu(btf2, 3);
VALIDATE_RAW_BTF(
btf2,
"[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
"[2] STRUCT 's' size=8 vlen=2\n"
"\t'a' type_id=3 bits_offset=0\n"
"\t'b' type_id=3 bits_offset=0",
"[3] STRUCT '(anon)' size=8 vlen=2\n"
"\t'f1' type_id=1 bits_offset=0\n"
"\t'f2' type_id=1 bits_offset=32",
"[4] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
"[5] STRUCT 's' size=8 vlen=2\n"
"\t'a' type_id=6 bits_offset=0\n"
"\t'b' type_id=7 bits_offset=0",
"[6] STRUCT '(anon)' size=8 vlen=2\n"
"\t'f1' type_id=4 bits_offset=0\n"
"\t'f2' type_id=4 bits_offset=32",
"[7] STRUCT '(anon)' size=8 vlen=2\n"
"\t'f1' type_id=4 bits_offset=0\n"
"\t'f2' type_id=4 bits_offset=32");
err = btf__dedup(btf2, NULL);
if (!ASSERT_OK(err, "btf_dedup"))
goto cleanup;
/* after dedup it should match the original data */
VALIDATE_RAW_BTF(
btf2,
"[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
"[2] STRUCT 's' size=8 vlen=2\n"
"\t'a' type_id=3 bits_offset=0\n"
"\t'b' type_id=3 bits_offset=0",
"[3] STRUCT '(anon)' size=8 vlen=2\n"
"\t'f1' type_id=1 bits_offset=0\n"
"\t'f2' type_id=1 bits_offset=32");
cleanup:
btf__free(btf2);
btf__free(btf1);
}
void test_btf_dedup_split()
{
if (test__start_subtest("split_simple"))
test_split_simple();
if (test__start_subtest("split_struct_duped"))
test_split_struct_duped();
if (test__start_subtest("split_fwd_resolve"))
test_split_fwd_resolve();
if (test__start_subtest("split_dup_struct_in_cu"))
test_split_dup_struct_in_cu();
}
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