/* SPDX-License-Identifier: GPL-2.0 */
/* Copyright (c) 2018 Facebook */

#include <linux/bpf.h>
#include <linux/btf.h>
#include <linux/err.h>
#include <linux/kernel.h>
#include <linux/filter.h>
#include <linux/unistd.h>
#include <bpf/bpf.h>
#include <sys/resource.h>
#include <libelf.h>
#include <gelf.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <stdarg.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <bpf/libbpf.h>
#include <bpf/btf.h>

#include "bpf_rlimit.h"
#include "bpf_util.h"

#define MAX_INSNS       512
#define MAX_SUBPROGS    16

static uint32_t pass_cnt;
static uint32_t error_cnt;
static uint32_t skip_cnt;

#define CHECK(condition, format...) ({                                  \
        int __ret = !!(condition);                                      \
        if (__ret) {                                                    \
                fprintf(stderr, "%s:%d:FAIL ", __func__, __LINE__);     \
                fprintf(stderr, format);                                \
        }                                                               \
        __ret;                                                          \
})

static int count_result(int err)
{
        if (err)
                error_cnt++;
        else
                pass_cnt++;

        fprintf(stderr, "\n");
        return err;
}

static int __base_pr(enum libbpf_print_level level __attribute__((unused)),
                     const char *format, va_list args)
{
        return vfprintf(stderr, format, args);
}

#define BTF_INFO_ENC(kind, kind_flag, vlen)                     \
        ((!!(kind_flag) << 31) | ((kind) << 24) | ((vlen) & BTF_MAX_VLEN))

#define BTF_TYPE_ENC(name, info, size_or_type)  \
        (name), (info), (size_or_type)

#define BTF_INT_ENC(encoding, bits_offset, nr_bits)     \
        ((encoding) << 24 | (bits_offset) << 16 | (nr_bits))
#define BTF_TYPE_INT_ENC(name, encoding, bits_offset, bits, sz) \
        BTF_TYPE_ENC(name, BTF_INFO_ENC(BTF_KIND_INT, 0, 0), sz),       \
        BTF_INT_ENC(encoding, bits_offset, bits)

#define BTF_FWD_ENC(name, kind_flag) \
        BTF_TYPE_ENC(name, BTF_INFO_ENC(BTF_KIND_FWD, kind_flag, 0), 0)

#define BTF_ARRAY_ENC(type, index_type, nr_elems)       \
        (type), (index_type), (nr_elems)
#define BTF_TYPE_ARRAY_ENC(type, index_type, nr_elems) \
        BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_ARRAY, 0, 0), 0), \
        BTF_ARRAY_ENC(type, index_type, nr_elems)

#define BTF_STRUCT_ENC(name, nr_elems, sz)      \
        BTF_TYPE_ENC(name, BTF_INFO_ENC(BTF_KIND_STRUCT, 0, nr_elems), sz)

#define BTF_UNION_ENC(name, nr_elems, sz)       \
        BTF_TYPE_ENC(name, BTF_INFO_ENC(BTF_KIND_UNION, 0, nr_elems), sz)

#define BTF_MEMBER_ENC(name, type, bits_offset) \
        (name), (type), (bits_offset)
#define BTF_ENUM_ENC(name, val) (name), (val)
#define BTF_MEMBER_OFFSET(bitfield_size, bits_offset) \
        ((bitfield_size) << 24 | (bits_offset))

#define BTF_TYPEDEF_ENC(name, type) \
        BTF_TYPE_ENC(name, BTF_INFO_ENC(BTF_KIND_TYPEDEF, 0, 0), type)

#define BTF_PTR_ENC(type) \
        BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_PTR, 0, 0), type)

#define BTF_CONST_ENC(type) \
        BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_CONST, 0, 0), type)

#define BTF_VOLATILE_ENC(type) \
        BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_VOLATILE, 0, 0), type)

#define BTF_RESTRICT_ENC(type) \
        BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_RESTRICT, 0, 0), type)

#define BTF_FUNC_PROTO_ENC(ret_type, nargs) \
        BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_FUNC_PROTO, 0, nargs), ret_type)

#define BTF_FUNC_PROTO_ARG_ENC(name, type) \
        (name), (type)

#define BTF_FUNC_ENC(name, func_proto) \
        BTF_TYPE_ENC(name, BTF_INFO_ENC(BTF_KIND_FUNC, 0, 0), func_proto)

#define BTF_END_RAW 0xdeadbeef
#define NAME_TBD 0xdeadb33f

#define NAME_NTH(N) (0xffff0000 | N)
#define IS_NAME_NTH(X) ((X & 0xffff0000) == 0xffff0000)
#define GET_NAME_NTH_IDX(X) (X & 0x0000ffff)

#define MAX_NR_RAW_U32 1024
#define BTF_LOG_BUF_SIZE 65535

static struct args {
        unsigned int raw_test_num;
        unsigned int file_test_num;
        unsigned int get_info_test_num;
        unsigned int info_raw_test_num;
        unsigned int dedup_test_num;
        bool raw_test;
        bool file_test;
        bool get_info_test;
        bool pprint_test;
        bool always_log;
        bool info_raw_test;
        bool dedup_test;
} args;

static char btf_log_buf[BTF_LOG_BUF_SIZE];

static struct btf_header hdr_tmpl = {
        .magic = BTF_MAGIC,
        .version = BTF_VERSION,
        .hdr_len = sizeof(struct btf_header),
};

struct btf_raw_test {
        const char *descr;
        const char *str_sec;
        const char *map_name;
        const char *err_str;
        __u32 raw_types[MAX_NR_RAW_U32];
        __u32 str_sec_size;
        enum bpf_map_type map_type;
        __u32 key_size;
        __u32 value_size;
        __u32 key_type_id;
        __u32 value_type_id;
        __u32 max_entries;
        bool btf_load_err;
        bool map_create_err;
        bool ordered_map;
        bool lossless_map;
        bool percpu_map;
        int hdr_len_delta;
        int type_off_delta;
        int str_off_delta;
        int str_len_delta;
};

#define BTF_STR_SEC(str) \
        .str_sec = str, .str_sec_size = sizeof(str)

static struct btf_raw_test raw_tests[] = {
/* enum E {
 *     E0,
 *     E1,
 * };
 *
 * struct A {
 *      unsigned long long m;
 *      int n;
 *      char o;
 *      [3 bytes hole]
 *      int p[8];
 *      int q[4][8];
 *      enum E r;
 * };
 */
{
        .descr = "struct test #1",
        .raw_types = {
                /* int */
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),  /* [1] */
                /* unsigned long long */
                BTF_TYPE_INT_ENC(0, 0, 0, 64, 8),               /* [2] */
                /* char */
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 8, 1),   /* [3] */
                /* int[8] */
                BTF_TYPE_ARRAY_ENC(1, 1, 8),                    /* [4] */
                /* struct A { */                                /* [5] */
                BTF_TYPE_ENC(NAME_TBD, BTF_INFO_ENC(BTF_KIND_STRUCT, 0, 6), 180),
                BTF_MEMBER_ENC(NAME_TBD, 2, 0), /* unsigned long long m;*/
                BTF_MEMBER_ENC(NAME_TBD, 1, 64),/* int n;               */
                BTF_MEMBER_ENC(NAME_TBD, 3, 96),/* char o;              */
                BTF_MEMBER_ENC(NAME_TBD, 4, 128),/* int p[8]            */
                BTF_MEMBER_ENC(NAME_TBD, 6, 384),/* int q[4][8]         */
                BTF_MEMBER_ENC(NAME_TBD, 7, 1408), /* enum E r          */
                /* } */
                /* int[4][8] */
                BTF_TYPE_ARRAY_ENC(4, 1, 4),                    /* [6] */
                /* enum E */                                    /* [7] */
                BTF_TYPE_ENC(NAME_TBD, BTF_INFO_ENC(BTF_KIND_ENUM, 0, 2), sizeof(int)),
                BTF_ENUM_ENC(NAME_TBD, 0),
                BTF_ENUM_ENC(NAME_TBD, 1),
                BTF_END_RAW,
        },
        .str_sec = "\0A\0m\0n\0o\0p\0q\0r\0E\0E0\0E1",
        .str_sec_size = sizeof("\0A\0m\0n\0o\0p\0q\0r\0E\0E0\0E1"),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "struct_test1_map",
        .key_size = sizeof(int),
        .value_size = 180,
        .key_type_id = 1,
        .value_type_id = 5,
        .max_entries = 4,
},

/* typedef struct b Struct_B;
 *
 * struct A {
 *     int m;
 *     struct b n[4];
 *     const Struct_B o[4];
 * };
 *
 * struct B {
 *     int m;
 *     int n;
 * };
 */
{
        .descr = "struct test #2",
        .raw_types = {
                /* int */                                       /* [1] */
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),
                /* struct b [4] */                              /* [2] */
                BTF_TYPE_ARRAY_ENC(4, 1, 4),

                /* struct A { */                                /* [3] */
                BTF_TYPE_ENC(NAME_TBD, BTF_INFO_ENC(BTF_KIND_STRUCT, 0, 3), 68),
                BTF_MEMBER_ENC(NAME_TBD, 1, 0), /* int m;               */
                BTF_MEMBER_ENC(NAME_TBD, 2, 32),/* struct B n[4]        */
                BTF_MEMBER_ENC(NAME_TBD, 8, 288),/* const Struct_B o[4];*/
                /* } */

                /* struct B { */                                /* [4] */
                BTF_TYPE_ENC(NAME_TBD, BTF_INFO_ENC(BTF_KIND_STRUCT, 0, 2), 8),
                BTF_MEMBER_ENC(NAME_TBD, 1, 0), /* int m; */
                BTF_MEMBER_ENC(NAME_TBD, 1, 32),/* int n; */
                /* } */

                /* const int */                                 /* [5] */
                BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_CONST, 0, 0), 1),
                /* typedef struct b Struct_B */ /* [6] */
                BTF_TYPE_ENC(NAME_TBD, BTF_INFO_ENC(BTF_KIND_TYPEDEF, 0, 0), 4),
                /* const Struct_B */                            /* [7] */
                BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_CONST, 0, 0), 6),
                /* const Struct_B [4] */                        /* [8] */
                BTF_TYPE_ARRAY_ENC(7, 1, 4),
                BTF_END_RAW,
        },
        .str_sec = "\0A\0m\0n\0o\0B\0m\0n\0Struct_B",
        .str_sec_size = sizeof("\0A\0m\0n\0o\0B\0m\0n\0Struct_B"),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "struct_test2_map",
        .key_size = sizeof(int),
        .value_size = 68,
        .key_type_id = 1,
        .value_type_id = 3,
        .max_entries = 4,
},

{
        .descr = "struct test #3 Invalid member offset",
        .raw_types = {
                /* int */                                       /* [1] */
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),
                /* int64 */                                     /* [2] */
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 64, 8),

                /* struct A { */                                /* [3] */
                BTF_TYPE_ENC(NAME_TBD, BTF_INFO_ENC(BTF_KIND_STRUCT, 0, 2), 16),
                BTF_MEMBER_ENC(NAME_TBD, 1, 64),        /* int m;               */
                BTF_MEMBER_ENC(NAME_TBD, 2, 0),         /* int64 n; */
                /* } */
                BTF_END_RAW,
        },
        .str_sec = "\0A\0m\0n\0",
        .str_sec_size = sizeof("\0A\0m\0n\0"),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "struct_test3_map",
        .key_size = sizeof(int),
        .value_size = 16,
        .key_type_id = 1,
        .value_type_id = 3,
        .max_entries = 4,
        .btf_load_err = true,
        .err_str = "Invalid member bits_offset",
},

/* Test member exceeds the size of struct.
 *
 * struct A {
 *     int m;
 *     int n;
 * };
 */
{
        .descr = "size check test #1",
        .raw_types = {
                /* int */                                       /* [1] */
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),
                /* struct A { */                                /* [2] */
                BTF_TYPE_ENC(NAME_TBD, BTF_INFO_ENC(BTF_KIND_STRUCT, 0, 2), sizeof(int) * 2 -  1),
                BTF_MEMBER_ENC(NAME_TBD, 1, 0), /* int m; */
                BTF_MEMBER_ENC(NAME_TBD, 1, 32),/* int n; */
                /* } */
                BTF_END_RAW,
        },
        .str_sec = "\0A\0m\0n",
        .str_sec_size = sizeof("\0A\0m\0n"),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "size_check1_map",
        .key_size = sizeof(int),
        .value_size = 1,
        .key_type_id = 1,
        .value_type_id = 2,
        .max_entries = 4,
        .btf_load_err = true,
        .err_str = "Member exceeds struct_size",
},

/* Test member exeeds the size of struct
 *
 * struct A {
 *     int m;
 *     int n[2];
 * };
 */
{
        .descr = "size check test #2",
        .raw_types = {
                /* int */                                       /* [1] */
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, sizeof(int)),
                /* int[2] */                                    /* [2] */
                BTF_TYPE_ARRAY_ENC(1, 1, 2),
                /* struct A { */                                /* [3] */
                BTF_TYPE_ENC(NAME_TBD, BTF_INFO_ENC(BTF_KIND_STRUCT, 0, 2), sizeof(int) * 3 - 1),
                BTF_MEMBER_ENC(NAME_TBD, 1, 0), /* int m; */
                BTF_MEMBER_ENC(NAME_TBD, 2, 32),/* int n[2]; */
                /* } */
                BTF_END_RAW,
        },
        .str_sec = "\0A\0m\0n",
        .str_sec_size = sizeof("\0A\0m\0n"),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "size_check2_map",
        .key_size = sizeof(int),
        .value_size = 1,
        .key_type_id = 1,
        .value_type_id = 3,
        .max_entries = 4,
        .btf_load_err = true,
        .err_str = "Member exceeds struct_size",
},

/* Test member exeeds the size of struct
 *
 * struct A {
 *     int m;
 *     void *n;
 * };
 */
{
        .descr = "size check test #3",
        .raw_types = {
                /* int */                                       /* [1] */
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, sizeof(int)),
                /* void* */                                     /* [2] */
                BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_PTR, 0, 0), 0),
                /* struct A { */                                /* [3] */
                BTF_TYPE_ENC(NAME_TBD, BTF_INFO_ENC(BTF_KIND_STRUCT, 0, 2), sizeof(int) + sizeof(void *) - 1),
                BTF_MEMBER_ENC(NAME_TBD, 1, 0), /* int m; */
                BTF_MEMBER_ENC(NAME_TBD, 2, 32),/* void *n; */
                /* } */
                BTF_END_RAW,
        },
        .str_sec = "\0A\0m\0n",
        .str_sec_size = sizeof("\0A\0m\0n"),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "size_check3_map",
        .key_size = sizeof(int),
        .value_size = 1,
        .key_type_id = 1,
        .value_type_id = 3,
        .max_entries = 4,
        .btf_load_err = true,
        .err_str = "Member exceeds struct_size",
},

/* Test member exceeds the size of struct
 *
 * enum E {
 *     E0,
 *     E1,
 * };
 *
 * struct A {
 *     int m;
 *     enum E n;
 * };
 */
{
        .descr = "size check test #4",
        .raw_types = {
                /* int */                       /* [1] */
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, sizeof(int)),
                /* enum E { */                  /* [2] */
                BTF_TYPE_ENC(NAME_TBD, BTF_INFO_ENC(BTF_KIND_ENUM, 0, 2), sizeof(int)),
                BTF_ENUM_ENC(NAME_TBD, 0),
                BTF_ENUM_ENC(NAME_TBD, 1),
                /* } */
                /* struct A { */                /* [3] */
                BTF_TYPE_ENC(NAME_TBD, BTF_INFO_ENC(BTF_KIND_STRUCT, 0, 2), sizeof(int) * 2 - 1),
                BTF_MEMBER_ENC(NAME_TBD, 1, 0), /* int m; */
                BTF_MEMBER_ENC(NAME_TBD, 2, 32),/* enum E n; */
                /* } */
                BTF_END_RAW,
        },
        .str_sec = "\0E\0E0\0E1\0A\0m\0n",
        .str_sec_size = sizeof("\0E\0E0\0E1\0A\0m\0n"),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "size_check4_map",
        .key_size = sizeof(int),
        .value_size = 1,
        .key_type_id = 1,
        .value_type_id = 3,
        .max_entries = 4,
        .btf_load_err = true,
        .err_str = "Member exceeds struct_size",
},

/* typedef const void * const_void_ptr;
 * struct A {
 *      const_void_ptr m;
 * };
 */
{
        .descr = "void test #1",
        .raw_types = {
                /* int */               /* [1] */
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),
                /* const void */        /* [2] */
                BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_CONST, 0, 0), 0),
                /* const void* */       /* [3] */
                BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_PTR, 0, 0), 2),
                /* typedef const void * const_void_ptr */
                BTF_TYPEDEF_ENC(NAME_TBD, 3),   /* [4] */
                /* struct A { */        /* [5] */
                BTF_TYPE_ENC(NAME_TBD, BTF_INFO_ENC(BTF_KIND_STRUCT, 0, 1), sizeof(void *)),
                /* const_void_ptr m; */
                BTF_MEMBER_ENC(NAME_TBD, 4, 0),
                /* } */
                BTF_END_RAW,
        },
        .str_sec = "\0const_void_ptr\0A\0m",
        .str_sec_size = sizeof("\0const_void_ptr\0A\0m"),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "void_test1_map",
        .key_size = sizeof(int),
        .value_size = sizeof(void *),
        .key_type_id = 1,
        .value_type_id = 4,
        .max_entries = 4,
},

/* struct A {
 *     const void m;
 * };
 */
{
        .descr = "void test #2",
        .raw_types = {
                /* int */               /* [1] */
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),
                /* const void */        /* [2] */
                BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_CONST, 0, 0), 0),
                /* struct A { */        /* [3] */
                BTF_TYPE_ENC(NAME_TBD, BTF_INFO_ENC(BTF_KIND_STRUCT, 0, 1), 8),
                /* const void m; */
                BTF_MEMBER_ENC(NAME_TBD, 2, 0),
                /* } */
                BTF_END_RAW,
        },
        .str_sec = "\0A\0m",
        .str_sec_size = sizeof("\0A\0m"),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "void_test2_map",
        .key_size = sizeof(int),
        .value_size = sizeof(void *),
        .key_type_id = 1,
        .value_type_id = 3,
        .max_entries = 4,
        .btf_load_err = true,
        .err_str = "Invalid member",
},

/* typedef const void * const_void_ptr;
 * const_void_ptr[4]
 */
{
        .descr = "void test #3",
        .raw_types = {
                /* int */               /* [1] */
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),
                /* const void */        /* [2] */
                BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_CONST, 0, 0), 0),
                /* const void* */       /* [3] */
                BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_PTR, 0, 0), 2),
                /* typedef const void * const_void_ptr */
                BTF_TYPEDEF_ENC(NAME_TBD, 3),   /* [4] */
                /* const_void_ptr[4] */
                BTF_TYPE_ARRAY_ENC(4, 1, 4),    /* [5] */
                BTF_END_RAW,
        },
        .str_sec = "\0const_void_ptr",
        .str_sec_size = sizeof("\0const_void_ptr"),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "void_test3_map",
        .key_size = sizeof(int),
        .value_size = sizeof(void *) * 4,
        .key_type_id = 1,
        .value_type_id = 5,
        .max_entries = 4,
},

/* const void[4]  */
{
        .descr = "void test #4",
        .raw_types = {
                /* int */               /* [1] */
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),
                /* const void */        /* [2] */
                BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_CONST, 0, 0), 0),
                /* const void[4] */     /* [3] */
                BTF_TYPE_ARRAY_ENC(2, 1, 4),
                BTF_END_RAW,
        },
        .str_sec = "\0A\0m",
        .str_sec_size = sizeof("\0A\0m"),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "void_test4_map",
        .key_size = sizeof(int),
        .value_size = sizeof(void *) * 4,
        .key_type_id = 1,
        .value_type_id = 3,
        .max_entries = 4,
        .btf_load_err = true,
        .err_str = "Invalid elem",
},

/* Array_A  <------------------+
 *     elem_type == Array_B    |
 *                    |        |
 *                    |        |
 * Array_B  <-------- +        |
 *      elem_type == Array A --+
 */
{
        .descr = "loop test #1",
        .raw_types = {
                /* int */                       /* [1] */
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),
                /* Array_A */                   /* [2] */
                BTF_TYPE_ARRAY_ENC(3, 1, 8),
                /* Array_B */                   /* [3] */
                BTF_TYPE_ARRAY_ENC(2, 1, 8),
                BTF_END_RAW,
        },
        .str_sec = "",
        .str_sec_size = sizeof(""),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "loop_test1_map",
        .key_size = sizeof(int),
        .value_size = sizeof(sizeof(int) * 8),
        .key_type_id = 1,
        .value_type_id = 2,
        .max_entries = 4,
        .btf_load_err = true,
        .err_str = "Loop detected",
},

/* typedef is _before_ the BTF type of Array_A and Array_B
 *
 * typedef Array_B int_array;
 *
 * Array_A  <------------------+
 *     elem_type == int_array  |
 *                    |        |
 *                    |        |
 * Array_B  <-------- +        |
 *      elem_type == Array_A --+
 */
{
        .descr = "loop test #2",
        .raw_types = {
                /* int */
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),  /* [1] */
                /* typedef Array_B int_array */
                BTF_TYPEDEF_ENC(1, 4),                          /* [2] */
                /* Array_A */
                BTF_TYPE_ARRAY_ENC(2, 1, 8),                    /* [3] */
                /* Array_B */
                BTF_TYPE_ARRAY_ENC(3, 1, 8),                    /* [4] */
                BTF_END_RAW,
        },
        .str_sec = "\0int_array\0",
        .str_sec_size = sizeof("\0int_array"),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "loop_test2_map",
        .key_size = sizeof(int),
        .value_size = sizeof(sizeof(int) * 8),
        .key_type_id = 1,
        .value_type_id = 2,
        .max_entries = 4,
        .btf_load_err = true,
        .err_str = "Loop detected",
},

/* Array_A  <------------------+
 *     elem_type == Array_B    |
 *                    |        |
 *                    |        |
 * Array_B  <-------- +        |
 *      elem_type == Array_A --+
 */
{
        .descr = "loop test #3",
        .raw_types = {
                /* int */                               /* [1] */
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),
                /* Array_A */                           /* [2] */
                BTF_TYPE_ARRAY_ENC(3, 1, 8),
                /* Array_B */                           /* [3] */
                BTF_TYPE_ARRAY_ENC(2, 1, 8),
                BTF_END_RAW,
        },
        .str_sec = "",
        .str_sec_size = sizeof(""),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "loop_test3_map",
        .key_size = sizeof(int),
        .value_size = sizeof(sizeof(int) * 8),
        .key_type_id = 1,
        .value_type_id = 2,
        .max_entries = 4,
        .btf_load_err = true,
        .err_str = "Loop detected",
},

/* typedef is _between_ the BTF type of Array_A and Array_B
 *
 * typedef Array_B int_array;
 *
 * Array_A  <------------------+
 *     elem_type == int_array  |
 *                    |        |
 *                    |        |
 * Array_B  <-------- +        |
 *      elem_type == Array_A --+
 */
{
        .descr = "loop test #4",
        .raw_types = {
                /* int */                               /* [1] */
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),
                /* Array_A */                           /* [2] */
                BTF_TYPE_ARRAY_ENC(3, 1, 8),
                /* typedef Array_B int_array */         /* [3] */
                BTF_TYPEDEF_ENC(NAME_TBD, 4),
                /* Array_B */                           /* [4] */
                BTF_TYPE_ARRAY_ENC(2, 1, 8),
                BTF_END_RAW,
        },
        .str_sec = "\0int_array\0",
        .str_sec_size = sizeof("\0int_array"),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "loop_test4_map",
        .key_size = sizeof(int),
        .value_size = sizeof(sizeof(int) * 8),
        .key_type_id = 1,
        .value_type_id = 2,
        .max_entries = 4,
        .btf_load_err = true,
        .err_str = "Loop detected",
},

/* typedef struct B Struct_B
 *
 * struct A {
 *     int x;
 *     Struct_B y;
 * };
 *
 * struct B {
 *     int x;
 *     struct A y;
 * };
 */
{
        .descr = "loop test #5",
        .raw_types = {
                /* int */
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),  /* [1] */
                /* struct A */                                  /* [2] */
                BTF_TYPE_ENC(NAME_TBD, BTF_INFO_ENC(BTF_KIND_STRUCT, 0, 2), 8),
                BTF_MEMBER_ENC(NAME_TBD, 1, 0), /* int x;       */
                BTF_MEMBER_ENC(NAME_TBD, 3, 32),/* Struct_B y;  */
                /* typedef struct B Struct_B */
                BTF_TYPEDEF_ENC(NAME_TBD, 4),                   /* [3] */
                /* struct B */                                  /* [4] */
                BTF_TYPE_ENC(NAME_TBD, BTF_INFO_ENC(BTF_KIND_STRUCT, 0, 2), 8),
                BTF_MEMBER_ENC(NAME_TBD, 1, 0), /* int x;       */
                BTF_MEMBER_ENC(NAME_TBD, 2, 32),/* struct A y;  */
                BTF_END_RAW,
        },
        .str_sec = "\0A\0x\0y\0Struct_B\0B\0x\0y",
        .str_sec_size = sizeof("\0A\0x\0y\0Struct_B\0B\0x\0y"),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "loop_test5_map",
        .key_size = sizeof(int),
        .value_size = 8,
        .key_type_id = 1,
        .value_type_id = 2,
        .max_entries = 4,
        .btf_load_err = true,
        .err_str = "Loop detected",
},

/* struct A {
 *     int x;
 *     struct A array_a[4];
 * };
 */
{
        .descr = "loop test #6",
        .raw_types = {
                /* int */
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),  /* [1] */
                BTF_TYPE_ARRAY_ENC(3, 1, 4),                    /* [2] */
                /* struct A */                                  /* [3] */
                BTF_TYPE_ENC(NAME_TBD, BTF_INFO_ENC(BTF_KIND_STRUCT, 0, 2), 8),
                BTF_MEMBER_ENC(NAME_TBD, 1, 0), /* int x;               */
                BTF_MEMBER_ENC(NAME_TBD, 2, 32),/* struct A array_a[4]; */
                BTF_END_RAW,
        },
        .str_sec = "\0A\0x\0y",
        .str_sec_size = sizeof("\0A\0x\0y"),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "loop_test6_map",
        .key_size = sizeof(int),
        .value_size = 8,
        .key_type_id = 1,
        .value_type_id = 2,
        .max_entries = 4,
        .btf_load_err = true,
        .err_str = "Loop detected",
},

{
        .descr = "loop test #7",
        .raw_types = {
                /* int */                               /* [1] */
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),
                /* struct A { */                        /* [2] */
                BTF_TYPE_ENC(NAME_TBD, BTF_INFO_ENC(BTF_KIND_STRUCT, 0, 1), sizeof(void *)),
                /*     const void *m;   */
                BTF_MEMBER_ENC(NAME_TBD, 3, 0),
                /* CONST type_id=3      */              /* [3] */
                BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_CONST, 0, 0), 4),
                /* PTR type_id=2        */              /* [4] */
                BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_PTR, 0, 0), 3),
                BTF_END_RAW,
        },
        .str_sec = "\0A\0m",
        .str_sec_size = sizeof("\0A\0m"),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "loop_test7_map",
        .key_size = sizeof(int),
        .value_size = sizeof(void *),
        .key_type_id = 1,
        .value_type_id = 2,
        .max_entries = 4,
        .btf_load_err = true,
        .err_str = "Loop detected",
},

{
        .descr = "loop test #8",
        .raw_types = {
                /* int */                               /* [1] */
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),
                /* struct A { */                        /* [2] */
                BTF_TYPE_ENC(NAME_TBD, BTF_INFO_ENC(BTF_KIND_STRUCT, 0, 1), sizeof(void *)),
                /*     const void *m;   */
                BTF_MEMBER_ENC(NAME_TBD, 4, 0),
                /* struct B { */                        /* [3] */
                BTF_TYPE_ENC(NAME_TBD, BTF_INFO_ENC(BTF_KIND_STRUCT, 0, 1), sizeof(void *)),
                /*     const void *n;   */
                BTF_MEMBER_ENC(NAME_TBD, 6, 0),
                /* CONST type_id=5      */              /* [4] */
                BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_CONST, 0, 0), 5),
                /* PTR type_id=6        */              /* [5] */
                BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_PTR, 0, 0), 6),
                /* CONST type_id=7      */              /* [6] */
                BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_CONST, 0, 0), 7),
                /* PTR type_id=4        */              /* [7] */
                BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_PTR, 0, 0), 4),
                BTF_END_RAW,
        },
        .str_sec = "\0A\0m\0B\0n",
        .str_sec_size = sizeof("\0A\0m\0B\0n"),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "loop_test8_map",
        .key_size = sizeof(int),
        .value_size = sizeof(void *),
        .key_type_id = 1,
        .value_type_id = 2,
        .max_entries = 4,
        .btf_load_err = true,
        .err_str = "Loop detected",
},

{
        .descr = "string section does not end with null",
        .raw_types = {
                /* int */                               /* [1] */
                BTF_TYPE_INT_ENC(NAME_TBD, BTF_INT_SIGNED, 0, 32, 4),
                BTF_END_RAW,
        },
        .str_sec = "\0int",
        .str_sec_size = sizeof("\0int") - 1,
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "hdr_test_map",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
        .btf_load_err = true,
        .err_str = "Invalid string section",
},

{
        .descr = "empty string section",
        .raw_types = {
                /* int */                               /* [1] */
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),
                BTF_END_RAW,
        },
        .str_sec = "",
        .str_sec_size = 0,
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "hdr_test_map",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
        .btf_load_err = true,
        .err_str = "Invalid string section",
},

{
        .descr = "empty type section",
        .raw_types = {
                BTF_END_RAW,
        },
        .str_sec = "\0int",
        .str_sec_size = sizeof("\0int"),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "hdr_test_map",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
        .btf_load_err = true,
        .err_str = "No type found",
},

{
        .descr = "btf_header test. Longer hdr_len",
        .raw_types = {
                /* int */                               /* [1] */
                BTF_TYPE_INT_ENC(NAME_TBD, BTF_INT_SIGNED, 0, 32, 4),
                BTF_END_RAW,
        },
        .str_sec = "\0int",
        .str_sec_size = sizeof("\0int"),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "hdr_test_map",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
        .btf_load_err = true,
        .hdr_len_delta = 4,
        .err_str = "Unsupported btf_header",
},

{
        .descr = "btf_header test. Gap between hdr and type",
        .raw_types = {
                /* int */                               /* [1] */
                BTF_TYPE_INT_ENC(NAME_TBD, BTF_INT_SIGNED, 0, 32, 4),
                BTF_END_RAW,
        },
        .str_sec = "\0int",
        .str_sec_size = sizeof("\0int"),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "hdr_test_map",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
        .btf_load_err = true,
        .type_off_delta = 4,
        .err_str = "Unsupported section found",
},

{
        .descr = "btf_header test. Gap between type and str",
        .raw_types = {
                /* int */                               /* [1] */
                BTF_TYPE_INT_ENC(NAME_TBD, BTF_INT_SIGNED, 0, 32, 4),
                BTF_END_RAW,
        },
        .str_sec = "\0int",
        .str_sec_size = sizeof("\0int"),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "hdr_test_map",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
        .btf_load_err = true,
        .str_off_delta = 4,
        .err_str = "Unsupported section found",
},

{
        .descr = "btf_header test. Overlap between type and str",
        .raw_types = {
                /* int */                               /* [1] */
                BTF_TYPE_INT_ENC(NAME_TBD, BTF_INT_SIGNED, 0, 32, 4),
                BTF_END_RAW,
        },
        .str_sec = "\0int",
        .str_sec_size = sizeof("\0int"),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "hdr_test_map",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
        .btf_load_err = true,
        .str_off_delta = -4,
        .err_str = "Section overlap found",
},

{
        .descr = "btf_header test. Larger BTF size",
        .raw_types = {
                /* int */                               /* [1] */
                BTF_TYPE_INT_ENC(NAME_TBD, BTF_INT_SIGNED, 0, 32, 4),
                BTF_END_RAW,
        },
        .str_sec = "\0int",
        .str_sec_size = sizeof("\0int"),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "hdr_test_map",

        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
        .btf_load_err = true,
        .str_len_delta = -4,
        .err_str = "Unsupported section found",
},

{
        .descr = "btf_header test. Smaller BTF size",
        .raw_types = {
                /* int */                               /* [1] */
                BTF_TYPE_INT_ENC(NAME_TBD, BTF_INT_SIGNED, 0, 32, 4),
                BTF_END_RAW,
        },
        .str_sec = "\0int",
        .str_sec_size = sizeof("\0int"),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "hdr_test_map",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
        .btf_load_err = true,
        .str_len_delta = 4,
        .err_str = "Total section length too long",
},

{
        .descr = "array test. index_type/elem_type \"int\"",
        .raw_types = {
                /* int */                               /* [1] */
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),
                /* int[16] */                           /* [2] */
                BTF_TYPE_ARRAY_ENC(1, 1, 16),
                BTF_END_RAW,
        },
        .str_sec = "",
        .str_sec_size = sizeof(""),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "array_test_map",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
},

{
        .descr = "array test. index_type/elem_type \"const int\"",
        .raw_types = {
                /* int */                               /* [1] */
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),
                /* int[16] */                           /* [2] */
                BTF_TYPE_ARRAY_ENC(3, 3, 16),
                /* CONST type_id=1 */                   /* [3] */
                BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_CONST, 0, 0), 1),
                BTF_END_RAW,
        },
        .str_sec = "",
        .str_sec_size = sizeof(""),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "array_test_map",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
},

{
        .descr = "array test. index_type \"const int:31\"",
        .raw_types = {
                /* int */                               /* [1] */
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),
                /* int:31 */                            /* [2] */
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 31, 4),
                /* int[16] */                           /* [3] */
                BTF_TYPE_ARRAY_ENC(1, 4, 16),
                /* CONST type_id=2 */                   /* [4] */
                BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_CONST, 0, 0), 2),
                BTF_END_RAW,
        },
        .str_sec = "",
        .str_sec_size = sizeof(""),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "array_test_map",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
        .btf_load_err = true,
        .err_str = "Invalid index",
},

{
        .descr = "array test. elem_type \"const int:31\"",
        .raw_types = {
                /* int */                               /* [1] */
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),
                /* int:31 */                            /* [2] */
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 31, 4),
                /* int[16] */                           /* [3] */
                BTF_TYPE_ARRAY_ENC(4, 1, 16),
                /* CONST type_id=2 */                   /* [4] */
                BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_CONST, 0, 0), 2),
                BTF_END_RAW,
        },
        .str_sec = "",
        .str_sec_size = sizeof(""),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "array_test_map",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
        .btf_load_err = true,
        .err_str = "Invalid array of int",
},

{
        .descr = "array test. index_type \"void\"",
        .raw_types = {
                /* int */                               /* [1] */
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),
                /* int[16] */                           /* [2] */
                BTF_TYPE_ARRAY_ENC(1, 0, 16),
                BTF_END_RAW,
        },
        .str_sec = "",
        .str_sec_size = sizeof(""),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "array_test_map",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
        .btf_load_err = true,
        .err_str = "Invalid index",
},

{
        .descr = "array test. index_type \"const void\"",
        .raw_types = {
                /* int */                               /* [1] */
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),
                /* int[16] */                           /* [2] */
                BTF_TYPE_ARRAY_ENC(1, 3, 16),
                /* CONST type_id=0 (void) */            /* [3] */
                BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_CONST, 0, 0), 0),
                BTF_END_RAW,
        },
        .str_sec = "",
        .str_sec_size = sizeof(""),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "array_test_map",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
        .btf_load_err = true,
        .err_str = "Invalid index",
},

{
        .descr = "array test. elem_type \"const void\"",
        .raw_types = {
                /* int */                               /* [1] */
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),
                /* int[16] */                           /* [2] */
                BTF_TYPE_ARRAY_ENC(3, 1, 16),
                /* CONST type_id=0 (void) */            /* [3] */
                BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_CONST, 0, 0), 0),
                BTF_END_RAW,
        },
        .str_sec = "",
        .str_sec_size = sizeof(""),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "array_test_map",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
        .btf_load_err = true,
        .err_str = "Invalid elem",
},

{
        .descr = "array test. elem_type \"const void *\"",
        .raw_types = {
                /* int */                               /* [1] */
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),
                /* const void *[16] */                  /* [2] */
                BTF_TYPE_ARRAY_ENC(3, 1, 16),
                /* CONST type_id=4 */                   /* [3] */
                BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_CONST, 0, 0), 4),
                /* void* */                             /* [4] */
                BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_PTR, 0, 0), 0),
                BTF_END_RAW,
        },
        .str_sec = "",
        .str_sec_size = sizeof(""),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "array_test_map",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
},

{
        .descr = "array test. index_type \"const void *\"",
        .raw_types = {
                /* int */                               /* [1] */
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),
                /* const void *[16] */                  /* [2] */
                BTF_TYPE_ARRAY_ENC(3, 3, 16),
                /* CONST type_id=4 */                   /* [3] */
                BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_CONST, 0, 0), 4),
                /* void* */                             /* [4] */
                BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_PTR, 0, 0), 0),
                BTF_END_RAW,
        },
        .str_sec = "",
        .str_sec_size = sizeof(""),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "array_test_map",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
        .btf_load_err = true,
        .err_str = "Invalid index",
},

{
        .descr = "array test. t->size != 0\"",
        .raw_types = {
                /* int */                               /* [1] */
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),
                /* int[16] */                           /* [2] */
                BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_ARRAY, 0, 0), 1),
                BTF_ARRAY_ENC(1, 1, 16),
                BTF_END_RAW,
        },
        .str_sec = "",
        .str_sec_size = sizeof(""),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "array_test_map",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
        .btf_load_err = true,
        .err_str = "size != 0",
},

{
        .descr = "int test. invalid int_data",
        .raw_types = {
                BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_INT, 0, 0), 4),
                0x10000000,
                BTF_END_RAW,
        },
        .str_sec = "",
        .str_sec_size = sizeof(""),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "array_test_map",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
        .btf_load_err = true,
        .err_str = "Invalid int_data",
},

{
        .descr = "invalid BTF_INFO",
        .raw_types = {
                /* int */                               /* [1] */
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),
                BTF_TYPE_ENC(0, 0x10000000, 4),
                BTF_END_RAW,
        },
        .str_sec = "",
        .str_sec_size = sizeof(""),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "array_test_map",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
        .btf_load_err = true,
        .err_str = "Invalid btf_info",
},

{
        .descr = "fwd test. t->type != 0\"",
        .raw_types = {
                /* int */                               /* [1] */
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),
                /* fwd type */                          /* [2] */
                BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_FWD, 0, 0), 1),
                BTF_END_RAW,
        },
        .str_sec = "",
        .str_sec_size = sizeof(""),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "fwd_test_map",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
        .btf_load_err = true,
        .err_str = "type != 0",
},

{
        .descr = "typedef (invalid name, name_off = 0)",
        .raw_types = {
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),  /* [1] */
                BTF_TYPEDEF_ENC(0, 1),                          /* [2] */
                BTF_END_RAW,
        },
        .str_sec = "\0__int",
        .str_sec_size = sizeof("\0__int"),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "typedef_check_btf",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
        .btf_load_err = true,
        .err_str = "Invalid name",
},

{
        .descr = "typedef (invalid name, invalid identifier)",
        .raw_types = {
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),  /* [1] */
                BTF_TYPEDEF_ENC(NAME_TBD, 1),                   /* [2] */
                BTF_END_RAW,
        },
        .str_sec = "\0__!int",
        .str_sec_size = sizeof("\0__!int"),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "typedef_check_btf",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
        .btf_load_err = true,
        .err_str = "Invalid name",
},

{
        .descr = "ptr type (invalid name, name_off <> 0)",
        .raw_types = {
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),          /* [1] */
                BTF_TYPE_ENC(NAME_TBD,
                             BTF_INFO_ENC(BTF_KIND_PTR, 0, 0), 1),      /* [2] */
                BTF_END_RAW,
        },
        .str_sec = "\0__int",
        .str_sec_size = sizeof("\0__int"),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "ptr_type_check_btf",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
        .btf_load_err = true,
        .err_str = "Invalid name",
},

{
        .descr = "volatile type (invalid name, name_off <> 0)",
        .raw_types = {
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),          /* [1] */
                BTF_TYPE_ENC(NAME_TBD,
                             BTF_INFO_ENC(BTF_KIND_VOLATILE, 0, 0), 1), /* [2] */
                BTF_END_RAW,
        },
        .str_sec = "\0__int",
        .str_sec_size = sizeof("\0__int"),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "volatile_type_check_btf",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
        .btf_load_err = true,
        .err_str = "Invalid name",
},

{
        .descr = "const type (invalid name, name_off <> 0)",
        .raw_types = {
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),          /* [1] */
                BTF_TYPE_ENC(NAME_TBD,
                             BTF_INFO_ENC(BTF_KIND_CONST, 0, 0), 1),    /* [2] */
                BTF_END_RAW,
        },
        .str_sec = "\0__int",
        .str_sec_size = sizeof("\0__int"),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "const_type_check_btf",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
        .btf_load_err = true,
        .err_str = "Invalid name",
},

{
        .descr = "restrict type (invalid name, name_off <> 0)",
        .raw_types = {
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),          /* [1] */
                BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_PTR, 0, 0), 1),   /* [2] */
                BTF_TYPE_ENC(NAME_TBD,
                             BTF_INFO_ENC(BTF_KIND_RESTRICT, 0, 0), 2), /* [3] */
                BTF_END_RAW,
        },
        .str_sec = "\0__int",
        .str_sec_size = sizeof("\0__int"),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "restrict_type_check_btf",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
        .btf_load_err = true,
        .err_str = "Invalid name",
},

{
        .descr = "fwd type (invalid name, name_off = 0)",
        .raw_types = {
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),          /* [1] */
                BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_FWD, 0, 0), 0),   /* [2] */
                BTF_END_RAW,
        },
        .str_sec = "\0__skb",
        .str_sec_size = sizeof("\0__skb"),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "fwd_type_check_btf",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
        .btf_load_err = true,
        .err_str = "Invalid name",
},

{
        .descr = "fwd type (invalid name, invalid identifier)",
        .raw_types = {
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),          /* [1] */
                BTF_TYPE_ENC(NAME_TBD,
                             BTF_INFO_ENC(BTF_KIND_FWD, 0, 0), 0),      /* [2] */
                BTF_END_RAW,
        },
        .str_sec = "\0__!skb",
        .str_sec_size = sizeof("\0__!skb"),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "fwd_type_check_btf",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
        .btf_load_err = true,
        .err_str = "Invalid name",
},

{
        .descr = "array type (invalid name, name_off <> 0)",
        .raw_types = {
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),          /* [1] */
                BTF_TYPE_ENC(NAME_TBD,
                             BTF_INFO_ENC(BTF_KIND_ARRAY, 0, 0), 0),    /* [2] */
                BTF_ARRAY_ENC(1, 1, 4),
                BTF_END_RAW,
        },
        .str_sec = "\0__skb",
        .str_sec_size = sizeof("\0__skb"),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "array_type_check_btf",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
        .btf_load_err = true,
        .err_str = "Invalid name",
},

{
        .descr = "struct type (name_off = 0)",
        .raw_types = {
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),          /* [1] */
                BTF_TYPE_ENC(0,
                             BTF_INFO_ENC(BTF_KIND_STRUCT, 0, 1), 4),   /* [2] */
                BTF_MEMBER_ENC(NAME_TBD, 1, 0),
                BTF_END_RAW,
        },
        .str_sec = "\0A",
        .str_sec_size = sizeof("\0A"),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "struct_type_check_btf",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
},

{
        .descr = "struct type (invalid name, invalid identifier)",
        .raw_types = {
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),          /* [1] */
                BTF_TYPE_ENC(NAME_TBD,
                             BTF_INFO_ENC(BTF_KIND_STRUCT, 0, 1), 4),   /* [2] */
                BTF_MEMBER_ENC(NAME_TBD, 1, 0),
                BTF_END_RAW,
        },
        .str_sec = "\0A!\0B",
        .str_sec_size = sizeof("\0A!\0B"),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "struct_type_check_btf",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
        .btf_load_err = true,
        .err_str = "Invalid name",
},

{
        .descr = "struct member (name_off = 0)",
        .raw_types = {
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),          /* [1] */
                BTF_TYPE_ENC(0,
                             BTF_INFO_ENC(BTF_KIND_STRUCT, 0, 1), 4),   /* [2] */
                BTF_MEMBER_ENC(NAME_TBD, 1, 0),
                BTF_END_RAW,
        },
        .str_sec = "\0A",
        .str_sec_size = sizeof("\0A"),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "struct_type_check_btf",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
},

{
        .descr = "struct member (invalid name, invalid identifier)",
        .raw_types = {
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),          /* [1] */
                BTF_TYPE_ENC(NAME_TBD,
                             BTF_INFO_ENC(BTF_KIND_STRUCT, 0, 1), 4),   /* [2] */
                BTF_MEMBER_ENC(NAME_TBD, 1, 0),
                BTF_END_RAW,
        },
        .str_sec = "\0A\0B*",
        .str_sec_size = sizeof("\0A\0B*"),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "struct_type_check_btf",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
        .btf_load_err = true,
        .err_str = "Invalid name",
},

{
        .descr = "enum type (name_off = 0)",
        .raw_types = {
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),          /* [1] */
                BTF_TYPE_ENC(0,
                             BTF_INFO_ENC(BTF_KIND_ENUM, 0, 1),
                             sizeof(int)),                              /* [2] */
                BTF_ENUM_ENC(NAME_TBD, 0),
                BTF_END_RAW,
        },
        .str_sec = "\0A\0B",
        .str_sec_size = sizeof("\0A\0B"),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "enum_type_check_btf",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
},

{
        .descr = "enum type (invalid name, invalid identifier)",
        .raw_types = {
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),          /* [1] */
                BTF_TYPE_ENC(NAME_TBD,
                             BTF_INFO_ENC(BTF_KIND_ENUM, 0, 1),
                             sizeof(int)),                              /* [2] */
                BTF_ENUM_ENC(NAME_TBD, 0),
                BTF_END_RAW,
        },
        .str_sec = "\0A!\0B",
        .str_sec_size = sizeof("\0A!\0B"),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "enum_type_check_btf",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
        .btf_load_err = true,
        .err_str = "Invalid name",
},

{
        .descr = "enum member (invalid name, name_off = 0)",
        .raw_types = {
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),          /* [1] */
                BTF_TYPE_ENC(0,
                             BTF_INFO_ENC(BTF_KIND_ENUM, 0, 1),
                             sizeof(int)),                              /* [2] */
                BTF_ENUM_ENC(0, 0),
                BTF_END_RAW,
        },
        .str_sec = "",
        .str_sec_size = sizeof(""),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "enum_type_check_btf",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
        .btf_load_err = true,
        .err_str = "Invalid name",
},

{
        .descr = "enum member (invalid name, invalid identifier)",
        .raw_types = {
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),          /* [1] */
                BTF_TYPE_ENC(0,
                             BTF_INFO_ENC(BTF_KIND_ENUM, 0, 1),
                             sizeof(int)),                              /* [2] */
                BTF_ENUM_ENC(NAME_TBD, 0),
                BTF_END_RAW,
        },
        .str_sec = "\0A!",
        .str_sec_size = sizeof("\0A!"),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "enum_type_check_btf",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
        .btf_load_err = true,
        .err_str = "Invalid name",
},
{
        .descr = "arraymap invalid btf key (a bit field)",
        .raw_types = {
                /* int */                               /* [1] */
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),
                /* 32 bit int with 32 bit offset */     /* [2] */
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 32, 32, 8),
                BTF_END_RAW,
        },
        .str_sec = "",
        .str_sec_size = sizeof(""),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "array_map_check_btf",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 2,
        .value_type_id = 1,
        .max_entries = 4,
        .map_create_err = true,
},

{
        .descr = "arraymap invalid btf key (!= 32 bits)",
        .raw_types = {
                /* int */                               /* [1] */
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),
                /* 16 bit int with 0 bit offset */      /* [2] */
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 16, 2),
                BTF_END_RAW,
        },
        .str_sec = "",
        .str_sec_size = sizeof(""),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "array_map_check_btf",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 2,
        .value_type_id = 1,
        .max_entries = 4,
        .map_create_err = true,
},

{
        .descr = "arraymap invalid btf value (too small)",
        .raw_types = {
                /* int */                               /* [1] */
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),
                BTF_END_RAW,
        },
        .str_sec = "",
        .str_sec_size = sizeof(""),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "array_map_check_btf",
        .key_size = sizeof(int),
        /* btf_value_size < map->value_size */
        .value_size = sizeof(__u64),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
        .map_create_err = true,
},

{
        .descr = "arraymap invalid btf value (too big)",
        .raw_types = {
                /* int */                               /* [1] */
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),
                BTF_END_RAW,
        },
        .str_sec = "",
        .str_sec_size = sizeof(""),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "array_map_check_btf",
        .key_size = sizeof(int),
        /* btf_value_size > map->value_size */
        .value_size = sizeof(__u16),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
        .map_create_err = true,
},

{
        .descr = "func proto (int (*)(int, unsigned int))",
        .raw_types = {
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4), /* [1] */
                BTF_TYPE_INT_ENC(0, 0, 0, 32, 4),               /* [2] */
                /* int (*)(int, unsigned int) */
                BTF_FUNC_PROTO_ENC(1, 2),                       /* [3] */
                        BTF_FUNC_PROTO_ARG_ENC(0, 1),
                        BTF_FUNC_PROTO_ARG_ENC(0, 2),
                BTF_END_RAW,
        },
        .str_sec = "",
        .str_sec_size = sizeof(""),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "func_proto_type_check_btf",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
},

{
        .descr = "func proto (vararg)",
        .raw_types = {
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),  /* [1] */
                BTF_TYPE_INT_ENC(0, 0, 0, 32, 4),               /* [2] */
                /* void (*)(int, unsigned int, ...) */
                BTF_FUNC_PROTO_ENC(0, 3),                       /* [3] */
                        BTF_FUNC_PROTO_ARG_ENC(0, 1),
                        BTF_FUNC_PROTO_ARG_ENC(0, 2),
                        BTF_FUNC_PROTO_ARG_ENC(0, 0),
                BTF_END_RAW,
        },
        .str_sec = "",
        .str_sec_size = sizeof(""),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "func_proto_type_check_btf",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
},

{
        .descr = "func proto (vararg with name)",
        .raw_types = {
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),  /* [1] */
                BTF_TYPE_INT_ENC(0, 0, 0, 32, 4),               /* [2] */
                /* void (*)(int a, unsigned int b, ... c) */
                BTF_FUNC_PROTO_ENC(0, 3),                       /* [3] */
                        BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 1),
                        BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 2),
                        BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 0),
                BTF_END_RAW,
        },
        .str_sec = "\0a\0b\0c",
        .str_sec_size = sizeof("\0a\0b\0c"),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "func_proto_type_check_btf",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
        .btf_load_err = true,
        .err_str = "Invalid arg#3",
},

{
        .descr = "func proto (arg after vararg)",
        .raw_types = {
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),  /* [1] */
                BTF_TYPE_INT_ENC(0, 0, 0, 32, 4),               /* [2] */
                /* void (*)(int a, ..., unsigned int b) */
                BTF_FUNC_PROTO_ENC(0, 3),                       /* [3] */
                        BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 1),
                        BTF_FUNC_PROTO_ARG_ENC(0, 0),
                        BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 2),
                BTF_END_RAW,
        },
        .str_sec = "\0a\0b",
        .str_sec_size = sizeof("\0a\0b"),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "func_proto_type_check_btf",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
        .btf_load_err = true,
        .err_str = "Invalid arg#2",
},

{
        .descr = "func proto (CONST=>TYPEDEF=>PTR=>FUNC_PROTO)",
        .raw_types = {
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),  /* [1] */
                BTF_TYPE_INT_ENC(0, 0, 0, 32, 4),               /* [2] */
                /* typedef void (*func_ptr)(int, unsigned int) */
                BTF_TYPEDEF_ENC(NAME_TBD, 5),                   /* [3] */
                /* const func_ptr */
                BTF_CONST_ENC(3),                               /* [4] */
                BTF_PTR_ENC(6),                                 /* [5] */
                BTF_FUNC_PROTO_ENC(0, 2),                       /* [6] */
                        BTF_FUNC_PROTO_ARG_ENC(0, 1),
                        BTF_FUNC_PROTO_ARG_ENC(0, 2),
                BTF_END_RAW,
        },
        .str_sec = "\0func_ptr",
        .str_sec_size = sizeof("\0func_ptr"),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "func_proto_type_check_btf",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
},

{
        .descr = "func proto (TYPEDEF=>FUNC_PROTO)",
        .raw_types = {
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),  /* [1] */
                BTF_TYPE_INT_ENC(0, 0, 0, 32, 4),               /* [2] */
                BTF_TYPEDEF_ENC(NAME_TBD, 4),                   /* [3] */
                BTF_FUNC_PROTO_ENC(0, 2),                       /* [4] */
                        BTF_FUNC_PROTO_ARG_ENC(0, 1),
                        BTF_FUNC_PROTO_ARG_ENC(0, 2),
                BTF_END_RAW,
        },
        .str_sec = "\0func_typedef",
        .str_sec_size = sizeof("\0func_typedef"),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "func_proto_type_check_btf",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
},

{
        .descr = "func proto (btf_resolve(arg))",
        .raw_types = {
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),  /* [1] */
                /* void (*)(const void *) */
                BTF_FUNC_PROTO_ENC(0, 1),                       /* [2] */
                        BTF_FUNC_PROTO_ARG_ENC(0, 3),
                BTF_CONST_ENC(4),                               /* [3] */
                BTF_PTR_ENC(0),                                 /* [4] */
                BTF_END_RAW,
        },
        .str_sec = "",
        .str_sec_size = sizeof(""),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "func_proto_type_check_btf",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
},

{
        .descr = "func proto (Not all arg has name)",
        .raw_types = {
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),  /* [1] */
                BTF_TYPE_INT_ENC(0, 0, 0, 32, 4),               /* [2] */
                /* void (*)(int, unsigned int b) */
                BTF_FUNC_PROTO_ENC(0, 2),                       /* [3] */
                        BTF_FUNC_PROTO_ARG_ENC(0, 1),
                        BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 2),
                BTF_END_RAW,
        },
        .str_sec = "\0b",
        .str_sec_size = sizeof("\0b"),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "func_proto_type_check_btf",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
},

{
        .descr = "func proto (Bad arg name_off)",
        .raw_types = {
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),  /* [1] */
                BTF_TYPE_INT_ENC(0, 0, 0, 32, 4),               /* [2] */
                /* void (*)(int a, unsigned int <bad_name_off>) */
                BTF_FUNC_PROTO_ENC(0, 2),                       /* [3] */
                        BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 1),
                        BTF_FUNC_PROTO_ARG_ENC(0x0fffffff, 2),
                BTF_END_RAW,
        },
        .str_sec = "\0a",
        .str_sec_size = sizeof("\0a"),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "func_proto_type_check_btf",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
        .btf_load_err = true,
        .err_str = "Invalid arg#2",
},

{
        .descr = "func proto (Bad arg name)",
        .raw_types = {
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),  /* [1] */
                BTF_TYPE_INT_ENC(0, 0, 0, 32, 4),               /* [2] */
                /* void (*)(int a, unsigned int !!!) */
                BTF_FUNC_PROTO_ENC(0, 2),                       /* [3] */
                        BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 1),
                        BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 2),
                BTF_END_RAW,
        },
        .str_sec = "\0a\0!!!",
        .str_sec_size = sizeof("\0a\0!!!"),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "func_proto_type_check_btf",

        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
        .btf_load_err = true,
        .err_str = "Invalid arg#2",
},

{
        .descr = "func proto (Invalid return type)",
        .raw_types = {
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),  /* [1] */
                BTF_TYPE_INT_ENC(0, 0, 0, 32, 4),               /* [2] */
                /* <bad_ret_type> (*)(int, unsigned int) */
                BTF_FUNC_PROTO_ENC(100, 2),                     /* [3] */
                        BTF_FUNC_PROTO_ARG_ENC(0, 1),
                        BTF_FUNC_PROTO_ARG_ENC(0, 2),
                BTF_END_RAW,
        },
        .str_sec = "",
        .str_sec_size = sizeof(""),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "func_proto_type_check_btf",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
        .btf_load_err = true,
        .err_str = "Invalid return type",
},

{
        .descr = "func proto (with func name)",
        .raw_types = {
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),  /* [1] */
                BTF_TYPE_INT_ENC(0, 0, 0, 32, 4),               /* [2] */
                /* void func_proto(int, unsigned int) */
                BTF_TYPE_ENC(NAME_TBD, BTF_INFO_ENC(BTF_KIND_FUNC_PROTO, 0, 2), 0),     /* [3] */
                        BTF_FUNC_PROTO_ARG_ENC(0, 1),
                        BTF_FUNC_PROTO_ARG_ENC(0, 2),
                BTF_END_RAW,
        },
        .str_sec = "\0func_proto",
        .str_sec_size = sizeof("\0func_proto"),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "func_proto_type_check_btf",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
        .btf_load_err = true,
        .err_str = "Invalid name",
},

{
        .descr = "func proto (const void arg)",
        .raw_types = {
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),  /* [1] */
                BTF_TYPE_INT_ENC(0, 0, 0, 32, 4),               /* [2] */
                /* void (*)(const void) */
                BTF_FUNC_PROTO_ENC(0, 1),                       /* [3] */
                        BTF_FUNC_PROTO_ARG_ENC(0, 4),
                BTF_CONST_ENC(0),                               /* [4] */
                BTF_END_RAW,
        },
        .str_sec = "",
        .str_sec_size = sizeof(""),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "func_proto_type_check_btf",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
        .btf_load_err = true,
        .err_str = "Invalid arg#1",
},

{
        .descr = "func (void func(int a, unsigned int b))",
        .raw_types = {
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),  /* [1] */
                BTF_TYPE_INT_ENC(0, 0, 0, 32, 4),               /* [2] */
                /* void (*)(int a, unsigned int b) */
                BTF_FUNC_PROTO_ENC(0, 2),                       /* [3] */
                        BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 1),
                        BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 2),
                /* void func(int a, unsigned int b) */
                BTF_FUNC_ENC(NAME_TBD, 3),                      /* [4] */
                BTF_END_RAW,
        },
        .str_sec = "\0a\0b\0func",
        .str_sec_size = sizeof("\0a\0b\0func"),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "func_type_check_btf",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
},

{
        .descr = "func (No func name)",
        .raw_types = {
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),  /* [1] */
                BTF_TYPE_INT_ENC(0, 0, 0, 32, 4),               /* [2] */
                /* void (*)(int a, unsigned int b) */
                BTF_FUNC_PROTO_ENC(0, 2),                       /* [3] */
                        BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 1),
                        BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 2),
                /* void <no_name>(int a, unsigned int b) */
                BTF_FUNC_ENC(0, 3),                             /* [4] */
                BTF_END_RAW,
        },
        .str_sec = "\0a\0b",
        .str_sec_size = sizeof("\0a\0b"),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "func_type_check_btf",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
        .btf_load_err = true,
        .err_str = "Invalid name",
},

{
        .descr = "func (Invalid func name)",
        .raw_types = {
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),  /* [1] */
                BTF_TYPE_INT_ENC(0, 0, 0, 32, 4),               /* [2] */
                /* void (*)(int a, unsigned int b) */
                BTF_FUNC_PROTO_ENC(0, 2),                       /* [3] */
                        BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 1),
                        BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 2),
                /* void !!!(int a, unsigned int b) */
                BTF_FUNC_ENC(NAME_TBD, 3),                      /* [4] */
                BTF_END_RAW,
        },
        .str_sec = "\0a\0b\0!!!",
        .str_sec_size = sizeof("\0a\0b\0!!!"),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "func_type_check_btf",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
        .btf_load_err = true,
        .err_str = "Invalid name",
},

{
        .descr = "func (Some arg has no name)",
        .raw_types = {
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),  /* [1] */
                BTF_TYPE_INT_ENC(0, 0, 0, 32, 4),               /* [2] */
                /* void (*)(int a, unsigned int) */
                BTF_FUNC_PROTO_ENC(0, 2),                       /* [3] */
                        BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 1),
                        BTF_FUNC_PROTO_ARG_ENC(0, 2),
                /* void func(int a, unsigned int) */
                BTF_FUNC_ENC(NAME_TBD, 3),                      /* [4] */
                BTF_END_RAW,
        },
        .str_sec = "\0a\0func",
        .str_sec_size = sizeof("\0a\0func"),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "func_type_check_btf",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
        .btf_load_err = true,
        .err_str = "Invalid arg#2",
},

{
        .descr = "func (Non zero vlen)",
        .raw_types = {
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),  /* [1] */
                BTF_TYPE_INT_ENC(0, 0, 0, 32, 4),               /* [2] */
                /* void (*)(int a, unsigned int b) */
                BTF_FUNC_PROTO_ENC(0, 2),                       /* [3] */
                        BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 1),
                        BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 2),
                /* void func(int a, unsigned int b) */
                BTF_TYPE_ENC(NAME_TBD, BTF_INFO_ENC(BTF_KIND_FUNC, 0, 2), 3),   /* [4] */
                BTF_END_RAW,
        },
        .str_sec = "\0a\0b\0func",
        .str_sec_size = sizeof("\0a\0b\0func"),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "func_type_check_btf",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
        .btf_load_err = true,
        .err_str = "vlen != 0",
},

{
        .descr = "func (Not referring to FUNC_PROTO)",
        .raw_types = {
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),  /* [1] */
                BTF_FUNC_ENC(NAME_TBD, 1),                      /* [2] */
                BTF_END_RAW,
        },
        .str_sec = "\0func",
        .str_sec_size = sizeof("\0func"),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "func_type_check_btf",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
        .btf_load_err = true,
        .err_str = "Invalid type_id",
},

{
        .descr = "invalid int kind_flag",
        .raw_types = {
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),          /* [1] */
                BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_INT, 1, 0), 4),   /* [2] */
                BTF_INT_ENC(0, 0, 32),
                BTF_END_RAW,
        },
        BTF_STR_SEC(""),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "int_type_check_btf",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
        .btf_load_err = true,
        .err_str = "Invalid btf_info kind_flag",
},

{
        .descr = "invalid ptr kind_flag",
        .raw_types = {
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),          /* [1] */
                BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_PTR, 1, 0), 1),   /* [2] */
                BTF_END_RAW,
        },
        BTF_STR_SEC(""),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "ptr_type_check_btf",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
        .btf_load_err = true,
        .err_str = "Invalid btf_info kind_flag",
},

{
        .descr = "invalid array kind_flag",
        .raw_types = {
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),          /* [1] */
                BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_ARRAY, 1, 0), 0), /* [2] */
                BTF_ARRAY_ENC(1, 1, 1),
                BTF_END_RAW,
        },
        BTF_STR_SEC(""),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "array_type_check_btf",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
        .btf_load_err = true,
        .err_str = "Invalid btf_info kind_flag",
},

{
        .descr = "invalid enum kind_flag",
        .raw_types = {
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),          /* [1] */
                BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_ENUM, 1, 1), 4),  /* [2] */
                BTF_ENUM_ENC(NAME_TBD, 0),
                BTF_END_RAW,
        },
        BTF_STR_SEC("\0A"),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "enum_type_check_btf",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
        .btf_load_err = true,
        .err_str = "Invalid btf_info kind_flag",
},

{
        .descr = "valid fwd kind_flag",
        .raw_types = {
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),          /* [1] */
                BTF_TYPE_ENC(NAME_TBD,
                             BTF_INFO_ENC(BTF_KIND_FWD, 1, 0), 0),      /* [2] */
                BTF_END_RAW,
        },
        BTF_STR_SEC("\0A"),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "fwd_type_check_btf",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
},

{
        .descr = "invalid typedef kind_flag",
        .raw_types = {
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),          /* [1] */
                BTF_TYPE_ENC(NAME_TBD,
                             BTF_INFO_ENC(BTF_KIND_TYPEDEF, 1, 0), 1),  /* [2] */
                BTF_END_RAW,
        },
        BTF_STR_SEC("\0A"),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "typedef_type_check_btf",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
        .btf_load_err = true,
        .err_str = "Invalid btf_info kind_flag",
},

{
        .descr = "invalid volatile kind_flag",
        .raw_types = {
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),                  /* [1] */
                BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_VOLATILE, 1, 0), 1),      /* [2] */
                BTF_END_RAW,
        },
        BTF_STR_SEC(""),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "volatile_type_check_btf",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
        .btf_load_err = true,
        .err_str = "Invalid btf_info kind_flag",
},

{
        .descr = "invalid const kind_flag",
        .raw_types = {
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),          /* [1] */
                BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_CONST, 1, 0), 1), /* [2] */
                BTF_END_RAW,
        },
        BTF_STR_SEC(""),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "const_type_check_btf",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
        .btf_load_err = true,
        .err_str = "Invalid btf_info kind_flag",
},

{
        .descr = "invalid restrict kind_flag",
        .raw_types = {
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),                  /* [1] */
                BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_RESTRICT, 1, 0), 1),      /* [2] */
                BTF_END_RAW,
        },
        BTF_STR_SEC(""),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "restrict_type_check_btf",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
        .btf_load_err = true,
        .err_str = "Invalid btf_info kind_flag",
},

{
        .descr = "invalid func kind_flag",
        .raw_types = {
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),                  /* [1] */
                BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_FUNC_PROTO, 0, 0), 0),    /* [2] */
                BTF_TYPE_ENC(NAME_TBD, BTF_INFO_ENC(BTF_KIND_FUNC, 1, 0), 2),   /* [3] */
                BTF_END_RAW,
        },
        BTF_STR_SEC("\0A"),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "func_type_check_btf",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
        .btf_load_err = true,
        .err_str = "Invalid btf_info kind_flag",
},

{
        .descr = "invalid func_proto kind_flag",
        .raw_types = {
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),                  /* [1] */
                BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_FUNC_PROTO, 1, 0), 0),    /* [2] */
                BTF_END_RAW,
        },
        BTF_STR_SEC(""),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "func_proto_type_check_btf",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
        .btf_load_err = true,
        .err_str = "Invalid btf_info kind_flag",
},

{
        .descr = "valid struct, kind_flag, bitfield_size = 0",
        .raw_types = {
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),                  /* [1] */
                BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_STRUCT, 1, 2), 8),        /* [2] */
                BTF_MEMBER_ENC(NAME_TBD, 1, BTF_MEMBER_OFFSET(0, 0)),
                BTF_MEMBER_ENC(NAME_TBD, 1, BTF_MEMBER_OFFSET(0, 32)),
                BTF_END_RAW,
        },
        BTF_STR_SEC("\0A\0B"),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "struct_type_check_btf",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
},

{
        .descr = "valid struct, kind_flag, int member, bitfield_size != 0",
        .raw_types = {
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),                  /* [1] */
                BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_STRUCT, 1, 2), 4),        /* [2] */
                BTF_MEMBER_ENC(NAME_TBD, 1, BTF_MEMBER_OFFSET(4, 0)),
                BTF_MEMBER_ENC(NAME_TBD, 1, BTF_MEMBER_OFFSET(4, 4)),
                BTF_END_RAW,
        },
        BTF_STR_SEC("\0A\0B"),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "struct_type_check_btf",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
},

{
        .descr = "valid union, kind_flag, int member, bitfield_size != 0",
        .raw_types = {
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),          /* [1] */
                BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_UNION, 1, 2), 4), /* [2] */
                BTF_MEMBER_ENC(NAME_TBD, 1, BTF_MEMBER_OFFSET(4, 0)),
                BTF_MEMBER_ENC(NAME_TBD, 1, BTF_MEMBER_OFFSET(4, 0)),
                BTF_END_RAW,
        },
        BTF_STR_SEC("\0A\0B"),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "union_type_check_btf",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
},

{
        .descr = "valid struct, kind_flag, enum member, bitfield_size != 0",
        .raw_types = {
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),          /* [1] */
                BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_ENUM, 0, 1), 4),  /* [2] */
                BTF_ENUM_ENC(NAME_TBD, 0),
                BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_STRUCT, 1, 2), 4),/* [3] */
                BTF_MEMBER_ENC(NAME_TBD, 2, BTF_MEMBER_OFFSET(4, 0)),
                BTF_MEMBER_ENC(NAME_TBD, 2, BTF_MEMBER_OFFSET(4, 4)),
                BTF_END_RAW,
        },
        BTF_STR_SEC("\0A\0B\0C"),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "struct_type_check_btf",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
},

{
        .descr = "valid union, kind_flag, enum member, bitfield_size != 0",
        .raw_types = {
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),          /* [1] */
                BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_ENUM, 0, 1), 4),  /* [2] */
                BTF_ENUM_ENC(NAME_TBD, 0),
                BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_UNION, 1, 2), 4), /* [3] */
                BTF_MEMBER_ENC(NAME_TBD, 2, BTF_MEMBER_OFFSET(4, 0)),
                BTF_MEMBER_ENC(NAME_TBD, 2, BTF_MEMBER_OFFSET(4, 0)),
                BTF_END_RAW,
        },
        BTF_STR_SEC("\0A\0B\0C"),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "union_type_check_btf",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
},

{
        .descr = "valid struct, kind_flag, typedef member, bitfield_size != 0",
        .raw_types = {
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),          /* [1] */
                BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_ENUM, 0, 1), 4),  /* [2] */
                BTF_ENUM_ENC(NAME_TBD, 0),
                BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_STRUCT, 1, 2), 4),/* [3] */
                BTF_MEMBER_ENC(NAME_TBD, 4, BTF_MEMBER_OFFSET(4, 0)),
                BTF_MEMBER_ENC(NAME_TBD, 5, BTF_MEMBER_OFFSET(4, 4)),
                BTF_TYPEDEF_ENC(NAME_TBD, 1),                           /* [4] */
                BTF_TYPEDEF_ENC(NAME_TBD, 2),                           /* [5] */
                BTF_END_RAW,
        },
        BTF_STR_SEC("\0A\0B\0C\0D\0E"),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "struct_type_check_btf",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
},

{
        .descr = "valid union, kind_flag, typedef member, bitfield_size != 0",
        .raw_types = {
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),          /* [1] */
                BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_ENUM, 0, 1), 4),  /* [2] */
                BTF_ENUM_ENC(NAME_TBD, 0),
                BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_UNION, 1, 2), 4), /* [3] */
                BTF_MEMBER_ENC(NAME_TBD, 4, BTF_MEMBER_OFFSET(4, 0)),
                BTF_MEMBER_ENC(NAME_TBD, 5, BTF_MEMBER_OFFSET(4, 0)),
                BTF_TYPEDEF_ENC(NAME_TBD, 1),                           /* [4] */
                BTF_TYPEDEF_ENC(NAME_TBD, 2),                           /* [5] */
                BTF_END_RAW,
        },
        BTF_STR_SEC("\0A\0B\0C\0D\0E"),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "union_type_check_btf",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
},

{
        .descr = "invalid struct, kind_flag, bitfield_size greater than struct size",
        .raw_types = {
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),                  /* [1] */
                BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_STRUCT, 1, 2), 4),        /* [2] */
                BTF_MEMBER_ENC(NAME_TBD, 1, BTF_MEMBER_OFFSET(20, 0)),
                BTF_MEMBER_ENC(NAME_TBD, 1, BTF_MEMBER_OFFSET(20, 20)),
                BTF_END_RAW,
        },
        BTF_STR_SEC("\0A\0B"),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "struct_type_check_btf",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
        .btf_load_err = true,
        .err_str = "Member exceeds struct_size",
},

{
        .descr = "invalid struct, kind_flag, bitfield base_type int not regular",
        .raw_types = {
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),                  /* [1] */
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 20, 4),                  /* [2] */
                BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_STRUCT, 1, 2), 4),        /* [3] */
                BTF_MEMBER_ENC(NAME_TBD, 2, BTF_MEMBER_OFFSET(20, 0)),
                BTF_MEMBER_ENC(NAME_TBD, 2, BTF_MEMBER_OFFSET(20, 20)),
                BTF_END_RAW,
        },
        BTF_STR_SEC("\0A\0B"),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "struct_type_check_btf",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
        .btf_load_err = true,
        .err_str = "Invalid member base type",
},

{
        .descr = "invalid struct, kind_flag, base_type int not regular",
        .raw_types = {
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),                  /* [1] */
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 12, 4),                  /* [2] */
                BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_STRUCT, 1, 2), 4),        /* [3] */
                BTF_MEMBER_ENC(NAME_TBD, 2, BTF_MEMBER_OFFSET(8, 0)),
                BTF_MEMBER_ENC(NAME_TBD, 2, BTF_MEMBER_OFFSET(8, 8)),
                BTF_END_RAW,
        },
        BTF_STR_SEC("\0A\0B"),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "struct_type_check_btf",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
        .btf_load_err = true,
        .err_str = "Invalid member base type",
},

{
        .descr = "invalid union, kind_flag, bitfield_size greater than struct size",
        .raw_types = {
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),          /* [1] */
                BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_UNION, 1, 2), 2), /* [2] */
                BTF_MEMBER_ENC(NAME_TBD, 1, BTF_MEMBER_OFFSET(8, 0)),
                BTF_MEMBER_ENC(NAME_TBD, 1, BTF_MEMBER_OFFSET(20, 0)),
                BTF_END_RAW,
        },
        BTF_STR_SEC("\0A\0B"),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "union_type_check_btf",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
        .btf_load_err = true,
        .err_str = "Member exceeds struct_size",
},

{
        .descr = "invalid struct, kind_flag, int member, bitfield_size = 0, wrong byte alignment",
        .raw_types = {
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),                  /* [1] */
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),                  /* [2] */
                BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_STRUCT, 1, 2), 12),       /* [3] */
                BTF_MEMBER_ENC(NAME_TBD, 2, BTF_MEMBER_OFFSET(0, 0)),
                BTF_MEMBER_ENC(NAME_TBD, 2, BTF_MEMBER_OFFSET(0, 36)),
                BTF_END_RAW,
        },
        BTF_STR_SEC("\0A\0B"),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "struct_type_check_btf",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
        .btf_load_err = true,
        .err_str = "Invalid member offset",
},

{
        .descr = "invalid struct, kind_flag, enum member, bitfield_size = 0, wrong byte alignment",
        .raw_types = {
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),                  /* [1] */
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),                  /* [2] */
                BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_ENUM, 0, 1), 4),  /* [2] */
                BTF_ENUM_ENC(NAME_TBD, 0),
                BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_STRUCT, 1, 2), 12),       /* [3] */
                BTF_MEMBER_ENC(NAME_TBD, 2, BTF_MEMBER_OFFSET(0, 0)),
                BTF_MEMBER_ENC(NAME_TBD, 2, BTF_MEMBER_OFFSET(0, 36)),
                BTF_END_RAW,
        },
        BTF_STR_SEC("\0A\0B\0C"),
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "struct_type_check_btf",
        .key_size = sizeof(int),
        .value_size = sizeof(int),
        .key_type_id = 1,
        .value_type_id = 1,
        .max_entries = 4,
        .btf_load_err = true,
        .err_str = "Invalid member offset",
},

}; /* struct btf_raw_test raw_tests[] */

static const char *get_next_str(const char *start, const char *end)
{
        return start < end - 1 ? start + 1 : NULL;
}

static int get_raw_sec_size(const __u32 *raw_types)
{
        int i;

        for (i = MAX_NR_RAW_U32 - 1;
             i >= 0 && raw_types[i] != BTF_END_RAW;
             i--)
                ;

        return i < 0 ? i : i * sizeof(raw_types[0]);
}

static void *btf_raw_create(const struct btf_header *hdr,
                            const __u32 *raw_types,
                            const char *str,
                            unsigned int str_sec_size,
                            unsigned int *btf_size,
                            const char **ret_next_str)
{
        const char *next_str = str, *end_str = str + str_sec_size;
        const char **strs_idx = NULL, **tmp_strs_idx;
        int strs_cap = 0, strs_cnt = 0, next_str_idx = 0;
        unsigned int size_needed, offset;
        struct btf_header *ret_hdr;
        int i, type_sec_size, err = 0;
        uint32_t *ret_types;
        void *raw_btf = NULL;

        type_sec_size = get_raw_sec_size(raw_types);
        if (CHECK(type_sec_size < 0, "Cannot get nr_raw_types"))
                return NULL;

        size_needed = sizeof(*hdr) + type_sec_size + str_sec_size;
        raw_btf = malloc(size_needed);
        if (CHECK(!raw_btf, "Cannot allocate memory for raw_btf"))
                return NULL;

        /* Copy header */
        memcpy(raw_btf, hdr, sizeof(*hdr));
        offset = sizeof(*hdr);

        /* Index strings */
        while ((next_str = get_next_str(next_str, end_str))) {
                if (strs_cnt == strs_cap) {
                        strs_cap += max(16, strs_cap / 2);
                        tmp_strs_idx = realloc(strs_idx,
                                               sizeof(*strs_idx) * strs_cap);
                        if (CHECK(!tmp_strs_idx,
                                  "Cannot allocate memory for strs_idx")) {
                                err = -1;
                                goto done;
                        }
                        strs_idx = tmp_strs_idx;
                }
                strs_idx[strs_cnt++] = next_str;
                next_str += strlen(next_str);
        }

        /* Copy type section */
        ret_types = raw_btf + offset;
        for (i = 0; i < type_sec_size / sizeof(raw_types[0]); i++) {
                if (raw_types[i] == NAME_TBD) {
                        if (CHECK(next_str_idx == strs_cnt,
                                  "Error in getting next_str #%d",
                                  next_str_idx)) {
                                err = -1;
                                goto done;
                        }
                        ret_types[i] = strs_idx[next_str_idx++] - str;
                } else if (IS_NAME_NTH(raw_types[i])) {
                        int idx = GET_NAME_NTH_IDX(raw_types[i]);

                        if (CHECK(idx <= 0 || idx > strs_cnt,
                                  "Error getting string #%d, strs_cnt:%d",
                                  idx, strs_cnt)) {
                                err = -1;
                                goto done;
                        }
                        ret_types[i] = strs_idx[idx-1] - str;
                } else {
                        ret_types[i] = raw_types[i];
                }
        }
        offset += type_sec_size;

        /* Copy string section */
        memcpy(raw_btf + offset, str, str_sec_size);

        ret_hdr = (struct btf_header *)raw_btf;
        ret_hdr->type_len = type_sec_size;
        ret_hdr->str_off = type_sec_size;
        ret_hdr->str_len = str_sec_size;

        *btf_size = size_needed;
        if (ret_next_str)
                *ret_next_str =
                        next_str_idx < strs_cnt ? strs_idx[next_str_idx] : NULL;

done:
        if (err) {
                if (raw_btf)
                        free(raw_btf);
                if (strs_idx)
                        free(strs_idx);
                return NULL;
        }
        return raw_btf;
}

static int do_test_raw(unsigned int test_num)
{
        struct btf_raw_test *test = &raw_tests[test_num - 1];
        struct bpf_create_map_attr create_attr = {};
        int map_fd = -1, btf_fd = -1;
        unsigned int raw_btf_size;
        struct btf_header *hdr;
        void *raw_btf;
        int err;

        fprintf(stderr, "BTF raw test[%u] (%s): ", test_num, test->descr);
        raw_btf = btf_raw_create(&hdr_tmpl,
                                 test->raw_types,
                                 test->str_sec,
                                 test->str_sec_size,
                                 &raw_btf_size, NULL);

        if (!raw_btf)
                return -1;

        hdr = raw_btf;

        hdr->hdr_len = (int)hdr->hdr_len + test->hdr_len_delta;
        hdr->type_off = (int)hdr->type_off + test->type_off_delta;
        hdr->str_off = (int)hdr->str_off + test->str_off_delta;
        hdr->str_len = (int)hdr->str_len + test->str_len_delta;

        *btf_log_buf = '\0';
        btf_fd = bpf_load_btf(raw_btf, raw_btf_size,
                              btf_log_buf, BTF_LOG_BUF_SIZE,
                              args.always_log);
        free(raw_btf);

        err = ((btf_fd == -1) != test->btf_load_err);
        if (CHECK(err, "btf_fd:%d test->btf_load_err:%u",
                  btf_fd, test->btf_load_err) ||
            CHECK(test->err_str && !strstr(btf_log_buf, test->err_str),
                  "expected err_str:%s", test->err_str)) {
                err = -1;
                goto done;
        }

        if (err || btf_fd == -1)
                goto done;

        create_attr.name = test->map_name;
        create_attr.map_type = test->map_type;
        create_attr.key_size = test->key_size;
        create_attr.value_size = test->value_size;
        create_attr.max_entries = test->max_entries;
        create_attr.btf_fd = btf_fd;
        create_attr.btf_key_type_id = test->key_type_id;
        create_attr.btf_value_type_id = test->value_type_id;

        map_fd = bpf_create_map_xattr(&create_attr);

        err = ((map_fd == -1) != test->map_create_err);
        CHECK(err, "map_fd:%d test->map_create_err:%u",
              map_fd, test->map_create_err);

done:
        if (!err)
                fprintf(stderr, "OK");

        if (*btf_log_buf && (err || args.always_log))
                fprintf(stderr, "\n%s", btf_log_buf);

        if (btf_fd != -1)
                close(btf_fd);
        if (map_fd != -1)
                close(map_fd);

        return err;
}

static int test_raw(void)
{
        unsigned int i;
        int err = 0;

        if (args.raw_test_num)
                return count_result(do_test_raw(args.raw_test_num));

        for (i = 1; i <= ARRAY_SIZE(raw_tests); i++)
                err |= count_result(do_test_raw(i));

        return err;
}

struct btf_get_info_test {
        const char *descr;
        const char *str_sec;
        __u32 raw_types[MAX_NR_RAW_U32];
        __u32 str_sec_size;
        int btf_size_delta;
        int (*special_test)(unsigned int test_num);
};

static int test_big_btf_info(unsigned int test_num);
static int test_btf_id(unsigned int test_num);

const struct btf_get_info_test get_info_tests[] = {
{
        .descr = "== raw_btf_size+1",
        .raw_types = {
                /* int */                               /* [1] */
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),
                BTF_END_RAW,
        },
        .str_sec = "",
        .str_sec_size = sizeof(""),
        .btf_size_delta = 1,
},
{
        .descr = "== raw_btf_size-3",
        .raw_types = {
                /* int */                               /* [1] */
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),
                BTF_END_RAW,
        },
        .str_sec = "",
        .str_sec_size = sizeof(""),
        .btf_size_delta = -3,
},
{
        .descr = "Large bpf_btf_info",
        .raw_types = {
                /* int */                               /* [1] */
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),
                BTF_END_RAW,
        },
        .str_sec = "",
        .str_sec_size = sizeof(""),
        .special_test = test_big_btf_info,
},
{
        .descr = "BTF ID",
        .raw_types = {
                /* int */                               /* [1] */
                BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),
                /* unsigned int */                      /* [2] */
                BTF_TYPE_INT_ENC(0, 0, 0, 32, 4),
                BTF_END_RAW,
        },
        .str_sec = "",
        .str_sec_size = sizeof(""),
        .special_test = test_btf_id,
},
};

static inline __u64 ptr_to_u64(const void *ptr)
{
        return (__u64)(unsigned long)ptr;
}

static int test_big_btf_info(unsigned int test_num)
{
        const struct btf_get_info_test *test = &get_info_tests[test_num - 1];
        uint8_t *raw_btf = NULL, *user_btf = NULL;
        unsigned int raw_btf_size;
        struct {
                struct bpf_btf_info info;
                uint64_t garbage;
        } info_garbage;
        struct bpf_btf_info *info;

        int btf_fd = -1, err;
        uint32_t info_len;

        raw_btf = btf_raw_create(&hdr_tmpl,
                                 test->raw_types,
                                 test->str_sec,
                                 test->str_sec_size,
                                 &raw_btf_size, NULL);

        if (!raw_btf)
                return -1;

        *btf_log_buf = '\0';

        user_btf = malloc(raw_btf_size);
        if (CHECK(!user_btf, "!user_btf")) {
                err = -1;
                goto done;
        }

        btf_fd = bpf_load_btf(raw_btf, raw_btf_size,
                              btf_log_buf, BTF_LOG_BUF_SIZE,
                              args.always_log);
        if (CHECK(btf_fd == -1, "errno:%d", errno)) {
                err = -1;
                goto done;
        }

        /*
         * GET_INFO should error out if the userspace info
         * has non zero tailing bytes.
         */
        info = &info_garbage.info;
        memset(info, 0, sizeof(*info));
        info_garbage.garbage = 0xdeadbeef;
        info_len = sizeof(info_garbage);
        info->btf = ptr_to_u64(user_btf);
        info->btf_size = raw_btf_size;

        err = bpf_obj_get_info_by_fd(btf_fd, info, &info_len);
        if (CHECK(!err, "!err")) {
                err = -1;
                goto done;
        }

        /*
         * GET_INFO should succeed even info_len is larger than
         * the kernel supported as long as tailing bytes are zero.
         * The kernel supported info len should also be returned
         * to userspace.
         */
        info_garbage.garbage = 0;
        err = bpf_obj_get_info_by_fd(btf_fd, info, &info_len);
        if (CHECK(err || info_len != sizeof(*info),
                  "err:%d errno:%d info_len:%u sizeof(*info):%lu",
                  err, errno, info_len, sizeof(*info))) {
                err = -1;
                goto done;
        }

        fprintf(stderr, "OK");

done:
        if (*btf_log_buf && (err || args.always_log))
                fprintf(stderr, "\n%s", btf_log_buf);

        free(raw_btf);
        free(user_btf);

        if (btf_fd != -1)
                close(btf_fd);

        return err;
}

static int test_btf_id(unsigned int test_num)
{
        const struct btf_get_info_test *test = &get_info_tests[test_num - 1];
        struct bpf_create_map_attr create_attr = {};
        uint8_t *raw_btf = NULL, *user_btf[2] = {};
        int btf_fd[2] = {-1, -1}, map_fd = -1;
        struct bpf_map_info map_info = {};
        struct bpf_btf_info info[2] = {};
        unsigned int raw_btf_size;
        uint32_t info_len;
        int err, i, ret;

        raw_btf = btf_raw_create(&hdr_tmpl,
                                 test->raw_types,
                                 test->str_sec,
                                 test->str_sec_size,
                                 &raw_btf_size, NULL);

        if (!raw_btf)
                return -1;

        *btf_log_buf = '\0';

        for (i = 0; i < 2; i++) {
                user_btf[i] = malloc(raw_btf_size);
                if (CHECK(!user_btf[i], "!user_btf[%d]", i)) {
                        err = -1;
                        goto done;
                }
                info[i].btf = ptr_to_u64(user_btf[i]);
                info[i].btf_size = raw_btf_size;
        }

        btf_fd[0] = bpf_load_btf(raw_btf, raw_btf_size,
                                 btf_log_buf, BTF_LOG_BUF_SIZE,
                                 args.always_log);
        if (CHECK(btf_fd[0] == -1, "errno:%d", errno)) {
                err = -1;
                goto done;
        }

        /* Test BPF_OBJ_GET_INFO_BY_ID on btf_id */
        info_len = sizeof(info[0]);
        err = bpf_obj_get_info_by_fd(btf_fd[0], &info[0], &info_len);
        if (CHECK(err, "errno:%d", errno)) {
                err = -1;
                goto done;
        }

        btf_fd[1] = bpf_btf_get_fd_by_id(info[0].id);
        if (CHECK(btf_fd[1] == -1, "errno:%d", errno)) {
                err = -1;
                goto done;
        }

        ret = 0;
        err = bpf_obj_get_info_by_fd(btf_fd[1], &info[1], &info_len);
        if (CHECK(err || info[0].id != info[1].id ||
                  info[0].btf_size != info[1].btf_size ||
                  (ret = memcmp(user_btf[0], user_btf[1], info[0].btf_size)),
                  "err:%d errno:%d id0:%u id1:%u btf_size0:%u btf_size1:%u memcmp:%d",
                  err, errno, info[0].id, info[1].id,
                  info[0].btf_size, info[1].btf_size, ret)) {
                err = -1;
                goto done;
        }

        /* Test btf members in struct bpf_map_info */
        create_attr.name = "test_btf_id";
        create_attr.map_type = BPF_MAP_TYPE_ARRAY;
        create_attr.key_size = sizeof(int);
        create_attr.value_size = sizeof(unsigned int);
        create_attr.max_entries = 4;
        create_attr.btf_fd = btf_fd[0];
        create_attr.btf_key_type_id = 1;
        create_attr.btf_value_type_id = 2;

        map_fd = bpf_create_map_xattr(&create_attr);
        if (CHECK(map_fd == -1, "errno:%d", errno)) {
                err = -1;
                goto done;
        }

        info_len = sizeof(map_info);
        err = bpf_obj_get_info_by_fd(map_fd, &map_info, &info_len);
        if (CHECK(err || map_info.btf_id != info[0].id ||
                  map_info.btf_key_type_id != 1 || map_info.btf_value_type_id != 2,
                  "err:%d errno:%d info.id:%u btf_id:%u btf_key_type_id:%u btf_value_type_id:%u",
                  err, errno, info[0].id, map_info.btf_id, map_info.btf_key_type_id,
                  map_info.btf_value_type_id)) {
                err = -1;
                goto done;
        }

        for (i = 0; i < 2; i++) {
                close(btf_fd[i]);
                btf_fd[i] = -1;
        }

        /* Test BTF ID is removed from the kernel */
        btf_fd[0] = bpf_btf_get_fd_by_id(map_info.btf_id);
        if (CHECK(btf_fd[0] == -1, "errno:%d", errno)) {
                err = -1;
                goto done;
        }
        close(btf_fd[0]);
        btf_fd[0] = -1;

        /* The map holds the last ref to BTF and its btf_id */
        close(map_fd);
        map_fd = -1;
        btf_fd[0] = bpf_btf_get_fd_by_id(map_info.btf_id);
        if (CHECK(btf_fd[0] != -1, "BTF lingers")) {
                err = -1;
                goto done;
        }

        fprintf(stderr, "OK");

done:
        if (*btf_log_buf && (err || args.always_log))
                fprintf(stderr, "\n%s", btf_log_buf);

        free(raw_btf);
        if (map_fd != -1)
                close(map_fd);
        for (i = 0; i < 2; i++) {
                free(user_btf[i]);
                if (btf_fd[i] != -1)
                        close(btf_fd[i]);
        }

        return err;
}

static int do_test_get_info(unsigned int test_num)
{
        const struct btf_get_info_test *test = &get_info_tests[test_num - 1];
        unsigned int raw_btf_size, user_btf_size, expected_nbytes;
        uint8_t *raw_btf = NULL, *user_btf = NULL;
        struct bpf_btf_info info = {};
        int btf_fd = -1, err, ret;
        uint32_t info_len;

        fprintf(stderr, "BTF GET_INFO test[%u] (%s): ",
                test_num, test->descr);

        if (test->special_test)
                return test->special_test(test_num);

        raw_btf = btf_raw_create(&hdr_tmpl,
                                 test->raw_types,
                                 test->str_sec,
                                 test->str_sec_size,
                                 &raw_btf_size, NULL);

        if (!raw_btf)
                return -1;

        *btf_log_buf = '\0';

        user_btf = malloc(raw_btf_size);
        if (CHECK(!user_btf, "!user_btf")) {
                err = -1;
                goto done;
        }

        btf_fd = bpf_load_btf(raw_btf, raw_btf_size,
                              btf_log_buf, BTF_LOG_BUF_SIZE,
                              args.always_log);
        if (CHECK(btf_fd == -1, "errno:%d", errno)) {
                err = -1;
                goto done;
        }

        user_btf_size = (int)raw_btf_size + test->btf_size_delta;
        expected_nbytes = min(raw_btf_size, user_btf_size);
        if (raw_btf_size > expected_nbytes)
                memset(user_btf + expected_nbytes, 0xff,
                       raw_btf_size - expected_nbytes);

        info_len = sizeof(info);
        info.btf = ptr_to_u64(user_btf);
        info.btf_size = user_btf_size;

        ret = 0;
        err = bpf_obj_get_info_by_fd(btf_fd, &info, &info_len);
        if (CHECK(err || !info.id || info_len != sizeof(info) ||
                  info.btf_size != raw_btf_size ||
                  (ret = memcmp(raw_btf, user_btf, expected_nbytes)),
                  "err:%d errno:%d info.id:%u info_len:%u sizeof(info):%lu raw_btf_size:%u info.btf_size:%u expected_nbytes:%u memcmp:%d",
                  err, errno, info.id, info_len, sizeof(info),
                  raw_btf_size, info.btf_size, expected_nbytes, ret)) {
                err = -1;
                goto done;
        }

        while (expected_nbytes < raw_btf_size) {
                fprintf(stderr, "%u...", expected_nbytes);
                if (CHECK(user_btf[expected_nbytes++] != 0xff,
                          "user_btf[%u]:%x != 0xff", expected_nbytes - 1,
                          user_btf[expected_nbytes - 1])) {
                        err = -1;
                        goto done;
                }
        }

        fprintf(stderr, "OK");

done:
        if (*btf_log_buf && (err || args.always_log))
                fprintf(stderr, "\n%s", btf_log_buf);

        free(raw_btf);
        free(user_btf);

        if (btf_fd != -1)
                close(btf_fd);

        return err;
}

static int test_get_info(void)
{
        unsigned int i;
        int err = 0;

        if (args.get_info_test_num)
                return count_result(do_test_get_info(args.get_info_test_num));

        for (i = 1; i <= ARRAY_SIZE(get_info_tests); i++)
                err |= count_result(do_test_get_info(i));

        return err;
}

struct btf_file_test {
        const char *file;
        bool btf_kv_notfound;
};

static struct btf_file_test file_tests[] = {
{
        .file = "test_btf_haskv.o",
},
{
        .file = "test_btf_nokv.o",
        .btf_kv_notfound = true,
},
};

static int file_has_btf_elf(const char *fn, bool *has_btf_ext)
{
        Elf_Scn *scn = NULL;
        GElf_Ehdr ehdr;
        int ret = 0;
        int elf_fd;
        Elf *elf;

        if (CHECK(elf_version(EV_CURRENT) == EV_NONE,
                  "elf_version(EV_CURRENT) == EV_NONE"))
                return -1;

        elf_fd = open(fn, O_RDONLY);
        if (CHECK(elf_fd == -1, "open(%s): errno:%d", fn, errno))
                return -1;

        elf = elf_begin(elf_fd, ELF_C_READ, NULL);
        if (CHECK(!elf, "elf_begin(%s): %s", fn, elf_errmsg(elf_errno()))) {
                ret = -1;
                goto done;
        }

        if (CHECK(!gelf_getehdr(elf, &ehdr), "!gelf_getehdr(%s)", fn)) {
                ret = -1;
                goto done;
        }

        while ((scn = elf_nextscn(elf, scn))) {
                const char *sh_name;
                GElf_Shdr sh;

                if (CHECK(gelf_getshdr(scn, &sh) != &sh,
                          "file:%s gelf_getshdr != &sh", fn)) {
                        ret = -1;
                        goto done;
                }

                sh_name = elf_strptr(elf, ehdr.e_shstrndx, sh.sh_name);
                if (!strcmp(sh_name, BTF_ELF_SEC))
                        ret = 1;
                if (!strcmp(sh_name, BTF_EXT_ELF_SEC))
                        *has_btf_ext = true;
        }

done:
        close(elf_fd);
        elf_end(elf);
        return ret;
}

static int do_test_file(unsigned int test_num)
{
        const struct btf_file_test *test = &file_tests[test_num - 1];
        const char *expected_fnames[] = {"_dummy_tracepoint",
                                         "test_long_fname_1",
                                         "test_long_fname_2"};
        struct bpf_prog_info info = {};
        struct bpf_object *obj = NULL;
        struct bpf_func_info *finfo;
        struct bpf_program *prog;
        __u32 info_len, rec_size;
        bool has_btf_ext = false;
        struct btf *btf = NULL;
        void *func_info = NULL;
        struct bpf_map *map;
        int i, err, prog_fd;

        fprintf(stderr, "BTF libbpf test[%u] (%s): ", test_num,
                test->file);

        err = file_has_btf_elf(test->file, &has_btf_ext);
        if (err == -1)
                return err;

        if (err == 0) {
                fprintf(stderr, "SKIP. No ELF %s found", BTF_ELF_SEC);
                skip_cnt++;
                return 0;
        }

        obj = bpf_object__open(test->file);
        if (CHECK(IS_ERR(obj), "obj: %ld", PTR_ERR(obj)))
                return PTR_ERR(obj);

        err = bpf_object__btf_fd(obj);
        if (CHECK(err == -1, "bpf_object__btf_fd: -1"))
                goto done;

        prog = bpf_program__next(NULL, obj);
        if (CHECK(!prog, "Cannot find bpf_prog")) {
                err = -1;
                goto done;
        }

        bpf_program__set_type(prog, BPF_PROG_TYPE_TRACEPOINT);
        err = bpf_object__load(obj);
        if (CHECK(err < 0, "bpf_object__load: %d", err))
                goto done;
        prog_fd = bpf_program__fd(prog);

        map = bpf_object__find_map_by_name(obj, "btf_map");
        if (CHECK(!map, "btf_map not found")) {
                err = -1;
                goto done;
        }

        err = (bpf_map__btf_key_type_id(map) == 0 || bpf_map__btf_value_type_id(map) == 0)
                != test->btf_kv_notfound;
        if (CHECK(err, "btf_key_type_id:%u btf_value_type_id:%u test->btf_kv_notfound:%u",
                  bpf_map__btf_key_type_id(map), bpf_map__btf_value_type_id(map),
                  test->btf_kv_notfound))
                goto done;

        if (!has_btf_ext)
                goto skip;

        /* get necessary program info */
        info_len = sizeof(struct bpf_prog_info);
        err = bpf_obj_get_info_by_fd(prog_fd, &info, &info_len);

        if (CHECK(err == -1, "invalid get info (1st) errno:%d", errno)) {
                fprintf(stderr, "%s\n", btf_log_buf);
                err = -1;
                goto done;
        }
        if (CHECK(info.nr_func_info != 3,
                  "incorrect info.nr_func_info (1st) %d",
                  info.nr_func_info)) {
                err = -1;
                goto done;
        }
        rec_size = info.func_info_rec_size;
        if (CHECK(rec_size != sizeof(struct bpf_func_info),
                  "incorrect info.func_info_rec_size (1st) %d\n", rec_size)) {
                err = -1;
                goto done;
        }

        func_info = malloc(info.nr_func_info * rec_size);
        if (CHECK(!func_info, "out of memory")) {
                err = -1;
                goto done;
        }

        /* reset info to only retrieve func_info related data */
        memset(&info, 0, sizeof(info));
        info.nr_func_info = 3;
        info.func_info_rec_size = rec_size;
        info.func_info = ptr_to_u64(func_info);

        err = bpf_obj_get_info_by_fd(prog_fd, &info, &info_len);

        if (CHECK(err == -1, "invalid get info (2nd) errno:%d", errno)) {
                fprintf(stderr, "%s\n", btf_log_buf);
                err = -1;
                goto done;
        }
        if (CHECK(info.nr_func_info != 3,
                  "incorrect info.nr_func_info (2nd) %d",
                  info.nr_func_info)) {
                err = -1;
                goto done;
        }
        if (CHECK(info.func_info_rec_size != rec_size,
                  "incorrect info.func_info_rec_size (2nd) %d",
                  info.func_info_rec_size)) {
                err = -1;
                goto done;
        }

        err = btf__get_from_id(info.btf_id, &btf);
        if (CHECK(err, "cannot get btf from kernel, err: %d", err))
                goto done;

        /* check three functions */
        finfo = func_info;
        for (i = 0; i < 3; i++) {
                const struct btf_type *t;
                const char *fname;

                t = btf__type_by_id(btf, finfo->type_id);
                if (CHECK(!t, "btf__type_by_id failure: id %u",
                          finfo->type_id)) {
                        err = -1;
                        goto done;
                }

                fname = btf__name_by_offset(btf, t->name_off);
                err = strcmp(fname, expected_fnames[i]);
                /* for the second and third functions in .text section,
                 * the compiler may order them either way.
                 */
                if (i && err)
                        err = strcmp(fname, expected_fnames[3 - i]);
                if (CHECK(err, "incorrect fname %s", fname ? : "")) {
                        err = -1;
                        goto done;
                }

                finfo = (void *)finfo + rec_size;
        }

skip:
        fprintf(stderr, "OK");

done:
        free(func_info);
        bpf_object__close(obj);
        return err;
}

static int test_file(void)
{
        unsigned int i;
        int err = 0;

        if (args.file_test_num)
                return count_result(do_test_file(args.file_test_num));

        for (i = 1; i <= ARRAY_SIZE(file_tests); i++)
                err |= count_result(do_test_file(i));

        return err;
}

const char *pprint_enum_str[] = {
        "ENUM_ZERO",
        "ENUM_ONE",
        "ENUM_TWO",
        "ENUM_THREE",
};

struct pprint_mapv {
        uint32_t ui32;
        uint16_t ui16;
        /* 2 bytes hole */
        int32_t si32;
        uint32_t unused_bits2a:2,
                bits28:28,
                unused_bits2b:2;
        union {
                uint64_t ui64;
                uint8_t ui8a[8];
        };
        enum {
                ENUM_ZERO,
                ENUM_ONE,
                ENUM_TWO,
                ENUM_THREE,
        } aenum;
        uint32_t ui32b;
        uint32_t bits2c:2;
};

static struct btf_raw_test pprint_test_template[] = {
{
        .raw_types = {
                /* unsighed char */                     /* [1] */
                BTF_TYPE_INT_ENC(NAME_TBD, 0, 0, 8, 1),
                /* unsigned short */                    /* [2] */
                BTF_TYPE_INT_ENC(NAME_TBD, 0, 0, 16, 2),
                /* unsigned int */                      /* [3] */
                BTF_TYPE_INT_ENC(NAME_TBD, 0, 0, 32, 4),
                /* int */                               /* [4] */
                BTF_TYPE_INT_ENC(NAME_TBD, BTF_INT_SIGNED, 0, 32, 4),
                /* unsigned long long */                /* [5] */
                BTF_TYPE_INT_ENC(NAME_TBD, 0, 0, 64, 8),
                /* 2 bits */                            /* [6] */
                BTF_TYPE_INT_ENC(0, 0, 0, 2, 2),
                /* 28 bits */                           /* [7] */
                BTF_TYPE_INT_ENC(0, 0, 0, 28, 4),
                /* uint8_t[8] */                        /* [8] */
                BTF_TYPE_ARRAY_ENC(9, 1, 8),
                /* typedef unsigned char uint8_t */     /* [9] */
                BTF_TYPEDEF_ENC(NAME_TBD, 1),
                /* typedef unsigned short uint16_t */   /* [10] */
                BTF_TYPEDEF_ENC(NAME_TBD, 2),
                /* typedef unsigned int uint32_t */     /* [11] */
                BTF_TYPEDEF_ENC(NAME_TBD, 3),
                /* typedef int int32_t */               /* [12] */
                BTF_TYPEDEF_ENC(NAME_TBD, 4),
                /* typedef unsigned long long uint64_t *//* [13] */
                BTF_TYPEDEF_ENC(NAME_TBD, 5),
                /* union (anon) */                      /* [14] */
                BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_UNION, 0, 2), 8),
                BTF_MEMBER_ENC(NAME_TBD, 13, 0),/* uint64_t ui64; */
                BTF_MEMBER_ENC(NAME_TBD, 8, 0), /* uint8_t ui8a[8]; */
                /* enum (anon) */                       /* [15] */
                BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_ENUM, 0, 4), 4),
                BTF_ENUM_ENC(NAME_TBD, 0),
                BTF_ENUM_ENC(NAME_TBD, 1),
                BTF_ENUM_ENC(NAME_TBD, 2),
                BTF_ENUM_ENC(NAME_TBD, 3),
                /* struct pprint_mapv */                /* [16] */
                BTF_TYPE_ENC(NAME_TBD, BTF_INFO_ENC(BTF_KIND_STRUCT, 0, 10), 40),
                BTF_MEMBER_ENC(NAME_TBD, 11, 0),        /* uint32_t ui32 */
                BTF_MEMBER_ENC(NAME_TBD, 10, 32),       /* uint16_t ui16 */
                BTF_MEMBER_ENC(NAME_TBD, 12, 64),       /* int32_t si32 */
                BTF_MEMBER_ENC(NAME_TBD, 6, 96),        /* unused_bits2a */
                BTF_MEMBER_ENC(NAME_TBD, 7, 98),        /* bits28 */
                BTF_MEMBER_ENC(NAME_TBD, 6, 126),       /* unused_bits2b */
                BTF_MEMBER_ENC(0, 14, 128),             /* union (anon) */
                BTF_MEMBER_ENC(NAME_TBD, 15, 192),      /* aenum */
                BTF_MEMBER_ENC(NAME_TBD, 11, 224),      /* uint32_t ui32b */
                BTF_MEMBER_ENC(NAME_TBD, 6, 256),       /* bits2c */
                BTF_END_RAW,
        },
        BTF_STR_SEC("\0unsigned char\0unsigned short\0unsigned int\0int\0unsigned long long\0uint8_t\0uint16_t\0uint32_t\0int32_t\0uint64_t\0ui64\0ui8a\0ENUM_ZERO\0ENUM_ONE\0ENUM_TWO\0ENUM_THREE\0pprint_mapv\0ui32\0ui16\0si32\0unused_bits2a\0bits28\0unused_bits2b\0aenum\0ui32b\0bits2c"),
        .key_size = sizeof(unsigned int),
        .value_size = sizeof(struct pprint_mapv),
        .key_type_id = 3,       /* unsigned int */
        .value_type_id = 16,    /* struct pprint_mapv */
        .max_entries = 128 * 1024,
},

{
        /* this type will have the same type as the
         * first .raw_types definition, but struct type will
         * be encoded with kind_flag set.
         */
        .raw_types = {
                /* unsighed char */                     /* [1] */
                BTF_TYPE_INT_ENC(NAME_TBD, 0, 0, 8, 1),
                /* unsigned short */                    /* [2] */
                BTF_TYPE_INT_ENC(NAME_TBD, 0, 0, 16, 2),
                /* unsigned int */                      /* [3] */
                BTF_TYPE_INT_ENC(NAME_TBD, 0, 0, 32, 4),
                /* int */                               /* [4] */
                BTF_TYPE_INT_ENC(NAME_TBD, BTF_INT_SIGNED, 0, 32, 4),
                /* unsigned long long */                /* [5] */
                BTF_TYPE_INT_ENC(NAME_TBD, 0, 0, 64, 8),
                BTF_TYPE_INT_ENC(0, 0, 0, 32, 4),       /* [6] */
                BTF_TYPE_INT_ENC(0, 0, 0, 32, 4),       /* [7] */
                /* uint8_t[8] */                        /* [8] */
                BTF_TYPE_ARRAY_ENC(9, 1, 8),
                /* typedef unsigned char uint8_t */     /* [9] */
                BTF_TYPEDEF_ENC(NAME_TBD, 1),
                /* typedef unsigned short uint16_t */   /* [10] */
                BTF_TYPEDEF_ENC(NAME_TBD, 2),
                /* typedef unsigned int uint32_t */     /* [11] */
                BTF_TYPEDEF_ENC(NAME_TBD, 3),
                /* typedef int int32_t */               /* [12] */
                BTF_TYPEDEF_ENC(NAME_TBD, 4),
                /* typedef unsigned long long uint64_t *//* [13] */
                BTF_TYPEDEF_ENC(NAME_TBD, 5),
                /* union (anon) */                      /* [14] */
                BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_UNION, 0, 2), 8),
                BTF_MEMBER_ENC(NAME_TBD, 13, 0),/* uint64_t ui64; */
                BTF_MEMBER_ENC(NAME_TBD, 8, 0), /* uint8_t ui8a[8]; */
                /* enum (anon) */                       /* [15] */
                BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_ENUM, 0, 4), 4),
                BTF_ENUM_ENC(NAME_TBD, 0),
                BTF_ENUM_ENC(NAME_TBD, 1),
                BTF_ENUM_ENC(NAME_TBD, 2),
                BTF_ENUM_ENC(NAME_TBD, 3),
                /* struct pprint_mapv */                /* [16] */
                BTF_TYPE_ENC(NAME_TBD, BTF_INFO_ENC(BTF_KIND_STRUCT, 1, 10), 40),
                BTF_MEMBER_ENC(NAME_TBD, 11, BTF_MEMBER_OFFSET(0, 0)),  /* uint32_t ui32 */
                BTF_MEMBER_ENC(NAME_TBD, 10, BTF_MEMBER_OFFSET(0, 32)), /* uint16_t ui16 */
                BTF_MEMBER_ENC(NAME_TBD, 12, BTF_MEMBER_OFFSET(0, 64)), /* int32_t si32 */
                BTF_MEMBER_ENC(NAME_TBD, 6, BTF_MEMBER_OFFSET(2, 96)),  /* unused_bits2a */
                BTF_MEMBER_ENC(NAME_TBD, 7, BTF_MEMBER_OFFSET(28, 98)), /* bits28 */
                BTF_MEMBER_ENC(NAME_TBD, 6, BTF_MEMBER_OFFSET(2, 126)), /* unused_bits2b */
                BTF_MEMBER_ENC(0, 14, BTF_MEMBER_OFFSET(0, 128)),       /* union (anon) */
                BTF_MEMBER_ENC(NAME_TBD, 15, BTF_MEMBER_OFFSET(0, 192)),        /* aenum */
                BTF_MEMBER_ENC(NAME_TBD, 11, BTF_MEMBER_OFFSET(0, 224)),        /* uint32_t ui32b */
                BTF_MEMBER_ENC(NAME_TBD, 6, BTF_MEMBER_OFFSET(2, 256)), /* bits2c */
                BTF_END_RAW,
        },
        BTF_STR_SEC("\0unsigned char\0unsigned short\0unsigned int\0int\0unsigned long long\0uint8_t\0uint16_t\0uint32_t\0int32_t\0uint64_t\0ui64\0ui8a\0ENUM_ZERO\0ENUM_ONE\0ENUM_TWO\0ENUM_THREE\0pprint_mapv\0ui32\0ui16\0si32\0unused_bits2a\0bits28\0unused_bits2b\0aenum\0ui32b\0bits2c"),
        .key_size = sizeof(unsigned int),
        .value_size = sizeof(struct pprint_mapv),
        .key_type_id = 3,       /* unsigned int */
        .value_type_id = 16,    /* struct pprint_mapv */
        .max_entries = 128 * 1024,
},

{
        /* this type will have the same layout as the
         * first .raw_types definition. The struct type will
         * be encoded with kind_flag set, bitfield members
         * are added typedef/const/volatile, and bitfield members
         * will have both int and enum types.
         */
        .raw_types = {
                /* unsighed char */                     /* [1] */
                BTF_TYPE_INT_ENC(NAME_TBD, 0, 0, 8, 1),
                /* unsigned short */                    /* [2] */
                BTF_TYPE_INT_ENC(NAME_TBD, 0, 0, 16, 2),
                /* unsigned int */                      /* [3] */
                BTF_TYPE_INT_ENC(NAME_TBD, 0, 0, 32, 4),
                /* int */                               /* [4] */
                BTF_TYPE_INT_ENC(NAME_TBD, BTF_INT_SIGNED, 0, 32, 4),
                /* unsigned long long */                /* [5] */
                BTF_TYPE_INT_ENC(NAME_TBD, 0, 0, 64, 8),
                BTF_TYPE_INT_ENC(0, 0, 0, 32, 4),       /* [6] */
                BTF_TYPE_INT_ENC(0, 0, 0, 32, 4),       /* [7] */
                /* uint8_t[8] */                        /* [8] */
                BTF_TYPE_ARRAY_ENC(9, 1, 8),
                /* typedef unsigned char uint8_t */     /* [9] */
                BTF_TYPEDEF_ENC(NAME_TBD, 1),
                /* typedef unsigned short uint16_t */   /* [10] */
                BTF_TYPEDEF_ENC(NAME_TBD, 2),
                /* typedef unsigned int uint32_t */     /* [11] */
                BTF_TYPEDEF_ENC(NAME_TBD, 3),
                /* typedef int int32_t */               /* [12] */
                BTF_TYPEDEF_ENC(NAME_TBD, 4),
                /* typedef unsigned long long uint64_t *//* [13] */
                BTF_TYPEDEF_ENC(NAME_TBD, 5),
                /* union (anon) */                      /* [14] */
                BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_UNION, 0, 2), 8),
                BTF_MEMBER_ENC(NAME_TBD, 13, 0),/* uint64_t ui64; */
                BTF_MEMBER_ENC(NAME_TBD, 8, 0), /* uint8_t ui8a[8]; */
                /* enum (anon) */                       /* [15] */
                BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_ENUM, 0, 4), 4),
                BTF_ENUM_ENC(NAME_TBD, 0),
                BTF_ENUM_ENC(NAME_TBD, 1),
                BTF_ENUM_ENC(NAME_TBD, 2),
                BTF_ENUM_ENC(NAME_TBD, 3),
                /* struct pprint_mapv */                /* [16] */
                BTF_TYPE_ENC(NAME_TBD, BTF_INFO_ENC(BTF_KIND_STRUCT, 1, 10), 40),
                BTF_MEMBER_ENC(NAME_TBD, 11, BTF_MEMBER_OFFSET(0, 0)),  /* uint32_t ui32 */
                BTF_MEMBER_ENC(NAME_TBD, 10, BTF_MEMBER_OFFSET(0, 32)), /* uint16_t ui16 */
                BTF_MEMBER_ENC(NAME_TBD, 12, BTF_MEMBER_OFFSET(0, 64)), /* int32_t si32 */
                BTF_MEMBER_ENC(NAME_TBD, 17, BTF_MEMBER_OFFSET(2, 96)), /* unused_bits2a */
                BTF_MEMBER_ENC(NAME_TBD, 7, BTF_MEMBER_OFFSET(28, 98)), /* bits28 */
                BTF_MEMBER_ENC(NAME_TBD, 19, BTF_MEMBER_OFFSET(2, 126)),/* unused_bits2b */
                BTF_MEMBER_ENC(0, 14, BTF_MEMBER_OFFSET(0, 128)),       /* union (anon) */
                BTF_MEMBER_ENC(NAME_TBD, 15, BTF_MEMBER_OFFSET(0, 192)),        /* aenum */
                BTF_MEMBER_ENC(NAME_TBD, 11, BTF_MEMBER_OFFSET(0, 224)),        /* uint32_t ui32b */
                BTF_MEMBER_ENC(NAME_TBD, 17, BTF_MEMBER_OFFSET(2, 256)),        /* bits2c */
                /* typedef unsigned int ___int */       /* [17] */
                BTF_TYPEDEF_ENC(NAME_TBD, 18),
                BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_VOLATILE, 0, 0), 6),      /* [18] */
                BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_CONST, 0, 0), 15),        /* [19] */
                BTF_END_RAW,
        },
        BTF_STR_SEC("\0unsigned char\0unsigned short\0unsigned int\0int\0unsigned long long\0uint8_t\0uint16_t\0uint32_t\0int32_t\0uint64_t\0ui64\0ui8a\0ENUM_ZERO\0ENUM_ONE\0ENUM_TWO\0ENUM_THREE\0pprint_mapv\0ui32\0ui16\0si32\0unused_bits2a\0bits28\0unused_bits2b\0aenum\0ui32b\0bits2c\0___int"),
        .key_size = sizeof(unsigned int),
        .value_size = sizeof(struct pprint_mapv),
        .key_type_id = 3,       /* unsigned int */
        .value_type_id = 16,    /* struct pprint_mapv */
        .max_entries = 128 * 1024,
},

};

static struct btf_pprint_test_meta {
        const char *descr;
        enum bpf_map_type map_type;
        const char *map_name;
        bool ordered_map;
        bool lossless_map;
        bool percpu_map;
} pprint_tests_meta[] = {
{
        .descr = "BTF pretty print array",
        .map_type = BPF_MAP_TYPE_ARRAY,
        .map_name = "pprint_test_array",
        .ordered_map = true,
        .lossless_map = true,
        .percpu_map = false,
},

{
        .descr = "BTF pretty print hash",
        .map_type = BPF_MAP_TYPE_HASH,
        .map_name = "pprint_test_hash",
        .ordered_map = false,
        .lossless_map = true,
        .percpu_map = false,
},

{
        .descr = "BTF pretty print lru hash",
        .map_type = BPF_MAP_TYPE_LRU_HASH,
        .map_name = "pprint_test_lru_hash",
        .ordered_map = false,
        .lossless_map = false,
        .percpu_map = false,
},

{
        .descr = "BTF pretty print percpu array",
        .map_type = BPF_MAP_TYPE_PERCPU_ARRAY,
        .map_name = "pprint_test_percpu_array",
        .ordered_map = true,
        .lossless_map = true,
        .percpu_map = true,
},

{
        .descr = "BTF pretty print percpu hash",
        .map_type = BPF_MAP_TYPE_PERCPU_HASH,
        .map_name = "pprint_test_percpu_hash",
        .ordered_map = false,
        .lossless_map = true,
        .percpu_map = true,
},

{
        .descr = "BTF pretty print lru percpu hash",
        .map_type = BPF_MAP_TYPE_LRU_PERCPU_HASH,
        .map_name = "pprint_test_lru_percpu_hash",
        .ordered_map = false,
        .lossless_map = false,
        .percpu_map = true,
},

};


static void set_pprint_mapv(struct pprint_mapv *v, uint32_t i,
                            int num_cpus, int rounded_value_size)
{
        int cpu;

        for (cpu = 0; cpu < num_cpus; cpu++) {
                v->ui32 = i + cpu;
                v->si32 = -i;
                v->unused_bits2a = 3;
                v->bits28 = i;
                v->unused_bits2b = 3;
                v->ui64 = i;
                v->aenum = i & 0x03;
                v->ui32b = 4;
                v->bits2c = 1;
                v = (void *)v + rounded_value_size;
        }
}

static int check_line(const char *expected_line, int nexpected_line,
                      int expected_line_len, const char *line)
{
        if (CHECK(nexpected_line == expected_line_len,
                  "expected_line is too long"))
                return -1;

        if (strcmp(expected_line, line)) {
                fprintf(stderr, "unexpected pprint output\n");
                fprintf(stderr, "expected: %s", expected_line);
                fprintf(stderr, "    read: %s", line);
                return -1;
        }

        return 0;
}


static int do_test_pprint(int test_num)
{
        const struct btf_raw_test *test = &pprint_test_template[test_num];
        struct bpf_create_map_attr create_attr = {};
        bool ordered_map, lossless_map, percpu_map;
        int err, ret, num_cpus, rounded_value_size;
        struct pprint_mapv *mapv = NULL;
        unsigned int key, nr_read_elems;
        int map_fd = -1, btf_fd = -1;
        unsigned int raw_btf_size;
        char expected_line[255];
        FILE *pin_file = NULL;
        char pin_path[255];
        size_t line_len = 0;
        char *line = NULL;
        uint8_t *raw_btf;
        ssize_t nread;

        fprintf(stderr, "%s(#%d)......", test->descr, test_num);
        raw_btf = btf_raw_create(&hdr_tmpl, test->raw_types,
                                 test->str_sec, test->str_sec_size,
                                 &raw_btf_size, NULL);

        if (!raw_btf)
                return -1;

        *btf_log_buf = '\0';
        btf_fd = bpf_load_btf(raw_btf, raw_btf_size,
                              btf_log_buf, BTF_LOG_BUF_SIZE,
                              args.always_log);
        free(raw_btf);

        if (CHECK(btf_fd == -1, "errno:%d", errno)) {
                err = -1;
                goto done;
        }

        create_attr.name = test->map_name;
        create_attr.map_type = test->map_type;
        create_attr.key_size = test->key_size;
        create_attr.value_size = test->value_size;
        create_attr.max_entries = test->max_entries;
        create_attr.btf_fd = btf_fd;
        create_attr.btf_key_type_id = test->key_type_id;
        create_attr.btf_value_type_id = test->value_type_id;

        map_fd = bpf_create_map_xattr(&create_attr);
        if (CHECK(map_fd == -1, "errno:%d", errno)) {
                err = -1;
                goto done;
        }

        ret = snprintf(pin_path, sizeof(pin_path), "%s/%s",
                       "/sys/fs/bpf", test->map_name);

        if (CHECK(ret == sizeof(pin_path), "pin_path %s/%s is too long",
                  "/sys/fs/bpf", test->map_name)) {
                err = -1;
                goto done;
        }

        err = bpf_obj_pin(map_fd, pin_path);
        if (CHECK(err, "bpf_obj_pin(%s): errno:%d.", pin_path, errno))
                goto done;

        percpu_map = test->percpu_map;
        num_cpus = percpu_map ? bpf_num_possible_cpus() : 1;
        rounded_value_size = round_up(sizeof(struct pprint_mapv), 8);
        mapv = calloc(num_cpus, rounded_value_size);
        if (CHECK(!mapv, "mapv allocation failure")) {
                err = -1;
                goto done;
        }

        for (key = 0; key < test->max_entries; key++) {
                set_pprint_mapv(mapv, key, num_cpus, rounded_value_size);
                bpf_map_update_elem(map_fd, &key, mapv, 0);
        }

        pin_file = fopen(pin_path, "r");
        if (CHECK(!pin_file, "fopen(%s): errno:%d", pin_path, errno)) {
                err = -1;
                goto done;
        }

        /* Skip lines start with '#' */
        while ((nread = getline(&line, &line_len, pin_file)) > 0 &&
               *line == '#')
                ;

        if (CHECK(nread <= 0, "Unexpected EOF")) {
                err = -1;
                goto done;
        }

        nr_read_elems = 0;
        ordered_map = test->ordered_map;
        lossless_map = test->lossless_map;
        do {
                struct pprint_mapv *cmapv;
                ssize_t nexpected_line;
                unsigned int next_key;
                int cpu;

                next_key = ordered_map ? nr_read_elems : atoi(line);
                set_pprint_mapv(mapv, next_key, num_cpus, rounded_value_size);
                cmapv = mapv;

                for (cpu = 0; cpu < num_cpus; cpu++) {
                        if (percpu_map) {
                                /* for percpu map, the format looks like:
                                 * <key>: {
                                 *      cpu0: <value_on_cpu0>
                                 *      cpu1: <value_on_cpu1>
                                 *      ...
                                 *      cpun: <value_on_cpun>
                                 * }
                                 *
                                 * let us verify the line containing the key here.
                                 */
                                if (cpu == 0) {
                                        nexpected_line = snprintf(expected_line,
                                                                  sizeof(expected_line),
                                                                  "%u: {\n",
                                                                  next_key);