tools/testing/selftests/bpf/prog_tests/btf_dedup_split.c

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

static void test_split_simple() {
        const struct btf_type *t;
        struct btf *btf1, *btf2;
        int str_off, err;

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

        btf__set_pointer_size(btf1, 8); /* enforce 64-bit arch */

        btf__add_int(btf1, "int", 4, BTF_INT_SIGNED);   /* [1] int */
        btf__add_ptr(btf1, 1);                          /* [2] ptr to int */
        btf__add_struct(btf1, "s1", 4);                 /* [3] struct s1 { */
        btf__add_field(btf1, "f1", 1, 0, 0);            /*      int f1; */
                                                        /* } */

        VALIDATE_RAW_BTF(
                btf1,
                "[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
                "[2] PTR '(anon)' type_id=1",
                "[3] STRUCT 's1' size=4 vlen=1\n"
                "\t'f1' type_id=1 bits_offset=0");

        ASSERT_STREQ(btf_type_c_dump(btf1), "\
struct s1 {\n\
        int f1;\n\
};\n\n", "c_dump");

        btf2 = btf__new_empty_split(btf1);
        if (!ASSERT_OK_PTR(btf2, "empty_split_btf"))
                goto cleanup;

        /* pointer size should be "inherited" from main BTF */
        ASSERT_EQ(btf__pointer_size(btf2), 8, "inherit_ptr_sz");

        str_off = btf__find_str(btf2, "int");
        ASSERT_NEQ(str_off, -ENOENT, "str_int_missing");

        t = btf__type_by_id(btf2, 1);
        if (!ASSERT_OK_PTR(t, "int_type"))
                goto cleanup;
        ASSERT_EQ(btf_is_int(t), true, "int_kind");
        ASSERT_STREQ(btf__str_by_offset(btf2, t->name_off), "int", "int_name");

        btf__add_struct(btf2, "s2", 16);                /* [4] struct s2 {      */
        btf__add_field(btf2, "f1", 6, 0, 0);            /*      struct s1 f1;   */
        btf__add_field(btf2, "f2", 5, 32, 0);           /*      int f2;         */
        btf__add_field(btf2, "f3", 2, 64, 0);           /*      int *f3;        */
                                                        /* } */

        /* duplicated int */
        btf__add_int(btf2, "int", 4, BTF_INT_SIGNED);   /* [5] int */

        /* duplicated struct s1 */
        btf__add_struct(btf2, "s1", 4);                 /* [6] struct s1 { */
        btf__add_field(btf2, "f1", 5, 0, 0);            /*      int f1; */
                                                        /* } */

        VALIDATE_RAW_BTF(
                btf2,
                "[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
                "[2] PTR '(anon)' type_id=1",
                "[3] STRUCT 's1' size=4 vlen=1\n"
                "\t'f1' type_id=1 bits_offset=0",
                "[4] STRUCT 's2' size=16 vlen=3\n"
                "\t'f1' type_id=6 bits_offset=0\n"
                "\t'f2' type_id=5 bits_offset=32\n"
                "\t'f3' type_id=2 bits_offset=64",
                "[5] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
                "[6] STRUCT 's1' size=4 vlen=1\n"
                "\t'f1' type_id=5 bits_offset=0");

        ASSERT_STREQ(btf_type_c_dump(btf2), "\
struct s1 {\n\
        int f1;\n\
};\n\
\n\
struct s1___2 {\n\
        int f1;\n\
};\n\
\n\
struct s2 {\n\
        struct s1___2 f1;\n\
        int f2;\n\
        int *f3;\n\
};\n\n", "c_dump");

        err = btf__dedup(btf2, NULL);
        if (!ASSERT_OK(err, "btf_dedup"))
                goto cleanup;

        VALIDATE_RAW_BTF(
                btf2,
                "[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
                "[2] PTR '(anon)' type_id=1",
                "[3] STRUCT 's1' size=4 vlen=1\n"
                "\t'f1' type_id=1 bits_offset=0",
                "[4] STRUCT 's2' size=16 vlen=3\n"
                "\t'f1' type_id=3 bits_offset=0\n"
                "\t'f2' type_id=1 bits_offset=32\n"
                "\t'f3' type_id=2 bits_offset=64");

        ASSERT_STREQ(btf_type_c_dump(btf2), "\
struct s1 {\n\
        int f1;\n\
};\n\
\n\
struct s2 {\n\
        struct s1 f1;\n\
        int f2;\n\
        int *f3;\n\
};\n\n", "c_dump");

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

static void test_split_fwd_resolve() {
        struct btf *btf1, *btf2;
        int err;

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

        btf__set_pointer_size(btf1, 8); /* enforce 64-bit arch */

        btf__add_int(btf1, "int", 4, BTF_INT_SIGNED);   /* [1] int */
        btf__add_ptr(btf1, 4);                          /* [2] ptr to struct s1 */
        btf__add_ptr(btf1, 5);                          /* [3] ptr to struct s2 */
        btf__add_struct(btf1, "s1", 16);                /* [4] struct s1 { */
        btf__add_field(btf1, "f1", 2, 0, 0);            /*      struct s1 *f1; */
        btf__add_field(btf1, "f2", 3, 64, 0);           /*      struct s2 *f2; */
                                                        /* } */
        btf__add_struct(btf1, "s2", 4);                 /* [5] struct s2 { */
        btf__add_field(btf1, "f1", 1, 0, 0);            /*      int f1; */
                                                        /* } */
        /* keep this not a part of type the graph to test btf_dedup_resolve_fwds */
        btf__add_struct(btf1, "s3", 4);                 /* [6] struct s3 { */
        btf__add_field(btf1, "f1", 1, 0, 0);            /*      int f1; */
                                                        /* } */

        VALIDATE_RAW_BTF(
                btf1,
                "[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
                "[2] PTR '(anon)' type_id=4",
                "[3] PTR '(anon)' type_id=5",
                "[4] STRUCT 's1' size=16 vlen=2\n"
                "\t'f1' type_id=2 bits_offset=0\n"
                "\t'f2' type_id=3 bits_offset=64",
                "[5] STRUCT 's2' size=4 vlen=1\n"
                "\t'f1' type_id=1 bits_offset=0",
                "[6] STRUCT 's3' size=4 vlen=1\n"
                "\t'f1' type_id=1 bits_offset=0");

        btf2 = btf__new_empty_split(btf1);
        if (!ASSERT_OK_PTR(btf2, "empty_split_btf"))
                goto cleanup;

        btf__add_int(btf2, "int", 4, BTF_INT_SIGNED);   /* [7] int */
        btf__add_ptr(btf2, 11);                         /* [8] ptr to struct s1 */
        btf__add_fwd(btf2, "s2", BTF_FWD_STRUCT);       /* [9] fwd for struct s2 */
        btf__add_ptr(btf2, 9);                          /* [10] ptr to fwd struct s2 */
        btf__add_struct(btf2, "s1", 16);                /* [11] struct s1 { */
        btf__add_field(btf2, "f1", 8, 0, 0);            /*      struct s1 *f1; */
        btf__add_field(btf2, "f2", 10, 64, 0);          /*      struct s2 *f2; */
                                                        /* } */
        btf__add_fwd(btf2, "s3", BTF_FWD_STRUCT);       /* [12] fwd for struct s3 */
        btf__add_ptr(btf2, 12);                         /* [13] ptr to struct s1 */

        VALIDATE_RAW_BTF(
                btf2,
                "[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
                "[2] PTR '(anon)' type_id=4",
                "[3] PTR '(anon)' type_id=5",
                "[4] STRUCT 's1' size=16 vlen=2\n"
                "\t'f1' type_id=2 bits_offset=0\n"
                "\t'f2' type_id=3 bits_offset=64",
                "[5] STRUCT 's2' size=4 vlen=1\n"
                "\t'f1' type_id=1 bits_offset=0",
                "[6] STRUCT 's3' size=4 vlen=1\n"
                "\t'f1' type_id=1 bits_offset=0",
                "[7] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
                "[8] PTR '(anon)' type_id=11",
                "[9] FWD 's2' fwd_kind=struct",
                "[10] PTR '(anon)' type_id=9",
                "[11] STRUCT 's1' size=16 vlen=2\n"
                "\t'f1' type_id=8 bits_offset=0\n"
                "\t'f2' type_id=10 bits_offset=64",
                "[12] FWD 's3' fwd_kind=struct",
                "[13] PTR '(anon)' type_id=12");

        err = btf__dedup(btf2, NULL);
        if (!ASSERT_OK(err, "btf_dedup"))
                goto cleanup;

        VALIDATE_RAW_BTF(
                btf2,
                "[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
                "[2] PTR '(anon)' type_id=4",
                "[3] PTR '(anon)' type_id=5",
                "[4] STRUCT 's1' size=16 vlen=2\n"
                "\t'f1' type_id=2 bits_offset=0\n"
                "\t'f2' type_id=3 bits_offset=64",
                "[5] STRUCT 's2' size=4 vlen=1\n"
                "\t'f1' type_id=1 bits_offset=0",
                "[6] STRUCT 's3' size=4 vlen=1\n"
                "\t'f1' type_id=1 bits_offset=0",
                "[7] PTR '(anon)' type_id=6");

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

static void test_split_struct_duped() {
        struct btf *btf1, *btf2;
        int err;

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

        btf__set_pointer_size(btf1, 8); /* enforce 64-bit arch */

        btf__add_int(btf1, "int", 4, BTF_INT_SIGNED);   /* [1] int */
        btf__add_ptr(btf1, 5);                          /* [2] ptr to struct s1 */
        btf__add_fwd(btf1, "s2", BTF_FWD_STRUCT);       /* [3] fwd for struct s2 */
        btf__add_ptr(btf1, 3);                          /* [4] ptr to fwd struct s2 */
        btf__add_struct(btf1, "s1", 16);                /* [5] struct s1 { */
        btf__add_field(btf1, "f1", 2, 0, 0);            /*      struct s1 *f1; */
        btf__add_field(btf1, "f2", 4, 64, 0);           /*      struct s2 *f2; */
                                                        /* } */

        VALIDATE_RAW_BTF(
                btf1,
                "[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
                "[2] PTR '(anon)' type_id=5",
                "[3] FWD 's2' fwd_kind=struct",
                "[4] PTR '(anon)' type_id=3",
                "[5] STRUCT 's1' size=16 vlen=2\n"
                "\t'f1' type_id=2 bits_offset=0\n"
                "\t'f2' type_id=4 bits_offset=64");

        btf2 = btf__new_empty_split(btf1);
        if (!ASSERT_OK_PTR(btf2, "empty_split_btf"))
                goto cleanup;

        btf__add_int(btf2, "int", 4, BTF_INT_SIGNED);   /* [6] int */
        btf__add_ptr(btf2, 10);                         /* [7] ptr to struct s1 */
        btf__add_fwd(btf2, "s2", BTF_FWD_STRUCT);       /* [8] fwd for struct s2 */
        btf__add_ptr(btf2, 11);                         /* [9] ptr to struct s2 */
        btf__add_struct(btf2, "s1", 16);                /* [10] struct s1 { */
        btf__add_field(btf2, "f1", 7, 0, 0);            /*      struct s1 *f1; */
        btf__add_field(btf2, "f2", 9, 64, 0);           /*      struct s2 *f2; */
                                                        /* } */
        btf__add_struct(btf2, "s2", 40);                /* [11] struct s2 {     */
        btf__add_field(btf2, "f1", 7, 0, 0);            /*      struct s1 *f1;  */
        btf__add_field(btf2, "f2", 9, 64, 0);           /*      struct s2 *f2;  */
        btf__add_field(btf2, "f3", 6, 128, 0);          /*      int f3;         */
        btf__add_field(btf2, "f4", 10, 192, 0);         /*      struct s1 f4;   */
                                                        /* } */
        btf__add_ptr(btf2, 8);                          /* [12] ptr to fwd struct s2 */
        btf__add_struct(btf2, "s3", 8);                 /* [13] struct s3 { */
        btf__add_field(btf2, "f1", 12, 0, 0);           /*      struct s2 *f1; (fwd) */
                                                        /* } */

        VALIDATE_RAW_BTF(
                btf2,
                "[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
                "[2] PTR '(anon)' type_id=5",
                "[3] FWD 's2' fwd_kind=struct",
                "[4] PTR '(anon)' type_id=3",
                "[5] STRUCT 's1' size=16 vlen=2\n"
                "\t'f1' type_id=2 bits_offset=0\n"
                "\t'f2' type_id=4 bits_offset=64",
                "[6] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
                "[7] PTR '(anon)' type_id=10",
                "[8] FWD 's2' fwd_kind=struct",
                "[9] PTR '(anon)' type_id=11",
                "[10] STRUCT 's1' size=16 vlen=2\n"
                "\t'f1' type_id=7 bits_offset=0\n"
                "\t'f2' type_id=9 bits_offset=64",
                "[11] STRUCT 's2' size=40 vlen=4\n"
                "\t'f1' type_id=7 bits_offset=0\n"
                "\t'f2' type_id=9 bits_offset=64\n"
                "\t'f3' type_id=6 bits_offset=128\n"
                "\t'f4' type_id=10 bits_offset=192",
                "[12] PTR '(anon)' type_id=8",
                "[13] STRUCT 's3' size=8 vlen=1\n"
                "\t'f1' type_id=12 bits_offset=0");

        err = btf__dedup(btf2, NULL);
        if (!ASSERT_OK(err, "btf_dedup"))
                goto cleanup;

        VALIDATE_RAW_BTF(
                btf2,
                "[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
                "[2] PTR '(anon)' type_id=5",
                "[3] FWD 's2' fwd_kind=struct",
                "[4] PTR '(anon)' type_id=3",
                "[5] STRUCT 's1' size=16 vlen=2\n"
                "\t'f1' type_id=2 bits_offset=0\n"
                "\t'f2' type_id=4 bits_offset=64",
                "[6] PTR '(anon)' type_id=8",
                "[7] PTR '(anon)' type_id=9",
                "[8] STRUCT 's1' size=16 vlen=2\n"
                "\t'f1' type_id=6 bits_offset=0\n"
                "\t'f2' type_id=7 bits_offset=64",
                "[9] STRUCT 's2' size=40 vlen=4\n"
                "\t'f1' type_id=6 bits_offset=0\n"
                "\t'f2' type_id=7 bits_offset=64\n"
                "\t'f3' type_id=1 bits_offset=128\n"
                "\t'f4' type_id=8 bits_offset=192",
                "[10] STRUCT 's3' size=8 vlen=1\n"
                "\t'f1' type_id=7 bits_offset=0");

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

static void btf_add_dup_struct_in_cu(struct btf *btf, int start_id)
{
#define ID(n) (start_id + n)
        btf__set_pointer_size(btf, 8); /* enforce 64-bit arch */

        btf__add_int(btf, "int", 4, BTF_INT_SIGNED);    /* [1] int */

        btf__add_struct(btf, "s", 8);                   /* [2] struct s { */
        btf__add_field(btf, "a", ID(3), 0, 0);          /*      struct anon a; */
        btf__add_field(btf, "b", ID(4), 0, 0);          /*      struct anon b; */
                                                        /* } */

        btf__add_struct(btf, "(anon)", 8);              /* [3] struct anon { */
        btf__add_field(btf, "f1", ID(1), 0, 0);         /*      int f1; */
        btf__add_field(btf, "f2", ID(1), 32, 0);        /*      int f2; */
                                                        /* } */

        btf__add_struct(btf, "(anon)", 8);              /* [4] struct anon { */
        btf__add_field(btf, "f1", ID(1), 0, 0);         /*      int f1; */
        btf__add_field(btf, "f2", ID(1), 32, 0);        /*      int f2; */
                                                        /* } */
#undef ID
}

static void test_split_dup_struct_in_cu()
{
        struct btf *btf1, *btf2 = NULL;
        int err;

        /* generate the base data.. */
        btf1 = btf__new_empty();
        if (!ASSERT_OK_PTR(btf1, "empty_main_btf"))
                return;

        btf_add_dup_struct_in_cu(btf1, 0);

        VALIDATE_RAW_BTF(
                        btf1,
                        "[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
                        "[2] STRUCT 's' size=8 vlen=2\n"
                        "\t'a' type_id=3 bits_offset=0\n"
                        "\t'b' type_id=4 bits_offset=0",
                        "[3] STRUCT '(anon)' size=8 vlen=2\n"
                        "\t'f1' type_id=1 bits_offset=0\n"
                        "\t'f2' type_id=1 bits_offset=32",
                        "[4] STRUCT '(anon)' size=8 vlen=2\n"
                        "\t'f1' type_id=1 bits_offset=0\n"
                        "\t'f2' type_id=1 bits_offset=32");

        /* ..dedup them... */
        err = btf__dedup(btf1, NULL);
        if (!ASSERT_OK(err, "btf_dedup"))
                goto cleanup;

        VALIDATE_RAW_BTF(
                        btf1,
                        "[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
                        "[2] STRUCT 's' size=8 vlen=2\n"
                        "\t'a' type_id=3 bits_offset=0\n"
                        "\t'b' type_id=3 bits_offset=0",
                        "[3] STRUCT '(anon)' size=8 vlen=2\n"
                        "\t'f1' type_id=1 bits_offset=0\n"
                        "\t'f2' type_id=1 bits_offset=32");

        /* and add the same data on top of it */
        btf2 = btf__new_empty_split(btf1);
        if (!ASSERT_OK_PTR(btf2, "empty_split_btf"))
                goto cleanup;

        btf_add_dup_struct_in_cu(btf2, 3);

        VALIDATE_RAW_BTF(
                        btf2,
                        "[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
                        "[2] STRUCT 's' size=8 vlen=2\n"
                        "\t'a' type_id=3 bits_offset=0\n"
                        "\t'b' type_id=3 bits_offset=0",
                        "[3] STRUCT '(anon)' size=8 vlen=2\n"
                        "\t'f1' type_id=1 bits_offset=0\n"
                        "\t'f2' type_id=1 bits_offset=32",
                        "[4] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
                        "[5] STRUCT 's' size=8 vlen=2\n"
                        "\t'a' type_id=6 bits_offset=0\n"
                        "\t'b' type_id=7 bits_offset=0",
                        "[6] STRUCT '(anon)' size=8 vlen=2\n"
                        "\t'f1' type_id=4 bits_offset=0\n"
                        "\t'f2' type_id=4 bits_offset=32",
                        "[7] STRUCT '(anon)' size=8 vlen=2\n"
                        "\t'f1' type_id=4 bits_offset=0\n"
                        "\t'f2' type_id=4 bits_offset=32");

        err = btf__dedup(btf2, NULL);
        if (!ASSERT_OK(err, "btf_dedup"))
                goto cleanup;

        /* after dedup it should match the original data */
        VALIDATE_RAW_BTF(
                        btf2,
                        "[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
                        "[2] STRUCT 's' size=8 vlen=2\n"
                        "\t'a' type_id=3 bits_offset=0\n"
                        "\t'b' type_id=3 bits_offset=0",
                        "[3] STRUCT '(anon)' size=8 vlen=2\n"
                        "\t'f1' type_id=1 bits_offset=0\n"
                        "\t'f2' type_id=1 bits_offset=32");

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

/* Ensure module split BTF dedup worked correctly; when dedup fails badly
 * core kernel types are in split BTF also, so ensure that references to
 * such types point at base - not split - BTF.
 *
 * bpf_testmod_test_write() has multiple core kernel type parameters;
 *
 * ssize_t
 * bpf_testmod_test_write(struct file *file, struct kobject *kobj,
 *                        struct bin_attribute *bin_attr,
 *                        char *buf, loff_t off, size_t len);
 *
 * Ensure each of the FUNC_PROTO params is a core kernel type.
 *
 * Do the same for
 *
 * __bpf_kfunc struct sock *bpf_kfunc_call_test3(struct sock *sk);
 *
 * ...and
 *
 * __bpf_kfunc void bpf_kfunc_call_test_pass_ctx(struct __sk_buff *skb);
 *
 */
const char *mod_funcs[] = {
        "bpf_testmod_test_write",
        "bpf_kfunc_call_test3",
        "bpf_kfunc_call_test_pass_ctx"
};

static void test_split_module(void)
{
        struct btf *vmlinux_btf, *btf1 = NULL;
        int i, nr_base_types;

        vmlinux_btf = btf__load_vmlinux_btf();
        if (!ASSERT_OK_PTR(vmlinux_btf, "vmlinux_btf"))
                return;
        nr_base_types = btf__type_cnt(vmlinux_btf);
        if (!ASSERT_GT(nr_base_types, 0, "nr_base_types"))
                goto cleanup;

        btf1 = btf__parse_split("/sys/kernel/btf/bpf_testmod", vmlinux_btf);
        if (!ASSERT_OK_PTR(btf1, "split_btf"))
                return;

        for (i = 0; i < ARRAY_SIZE(mod_funcs); i++) {
                const struct btf_param *p;
                const struct btf_type *t;
                __u16 vlen;
                __u32 id;
                int j;

                id = btf__find_by_name_kind(btf1, mod_funcs[i], BTF_KIND_FUNC);
                if (!ASSERT_GE(id, nr_base_types, "func_id"))
                        goto cleanup;
                t = btf__type_by_id(btf1, id);
                if (!ASSERT_OK_PTR(t, "func_id_type"))
                        goto cleanup;
                t = btf__type_by_id(btf1, t->type);
                if (!ASSERT_OK_PTR(t, "func_proto_id_type"))
                        goto cleanup;
                if (!ASSERT_EQ(btf_is_func_proto(t), true, "is_func_proto"))
                        goto cleanup;
                vlen = btf_vlen(t);

                for (j = 0, p = btf_params(t); j < vlen; j++, p++) {
                        /* bpf_testmod uses resilient split BTF, so any
                         * reference types will be added to split BTF and their
                         * associated targets will be base BTF types; for example
                         * for a "struct sock *" the PTR will be in split BTF
                         * while the "struct sock" will be in base.
                         *
                         * In some cases like loff_t we have to resolve
                         * multiple typedefs hence the while() loop below.
                         *
                         * Note that resilient split BTF generation depends
                         * on pahole version, so we do not assert that
                         * reference types are in split BTF, as if pahole
                         * does not support resilient split BTF they will
                         * also be base BTF types.
                         */
                        id = p->type;
                        do {
                                t = btf__type_by_id(btf1, id);
                                if (!ASSERT_OK_PTR(t, "param_ref_type"))
                                        goto cleanup;
                                if (!btf_is_mod(t) && !btf_is_ptr(t) && !btf_is_typedef(t))
                                        break;
                                id = t->type;
                        } while (true);

                        if (!ASSERT_LT(id, nr_base_types, "verify_base_type"))
                                goto cleanup;
                }
        }
cleanup:
        btf__free(btf1);
        btf__free(vmlinux_btf);
}

void test_btf_dedup_split()
{
        if (test__start_subtest("split_simple"))
                test_split_simple();
        if (test__start_subtest("split_struct_duped"))
                test_split_struct_duped();
        if (test__start_subtest("split_fwd_resolve"))
                test_split_fwd_resolve();
        if (test__start_subtest("split_dup_struct_in_cu"))
                test_split_dup_struct_in_cu();
        if (test__start_subtest("split_module"))
                test_split_module();
}
Linux
