root/tools/testing/selftests/bpf/prog_tests/btf_module.c
/* SPDX-License-Identifier: GPL-2.0 */
/* Copyright (c) 2021 Hengqi Chen */

#include <test_progs.h>
#include <bpf/btf.h>

static const char *module_name = "bpf_testmod";
static const char *symbol_name = "bpf_testmod_test_read";

void test_btf_module()
{
        struct btf *vmlinux_btf, *module_btf;
        __s32 type_id;

        if (!env.has_testmod) {
                test__skip();
                return;
        }

        vmlinux_btf = btf__load_vmlinux_btf();
        if (!ASSERT_OK_PTR(vmlinux_btf, "could not load vmlinux BTF"))
                return;

        module_btf = btf__load_module_btf(module_name, vmlinux_btf);
        if (!ASSERT_OK_PTR(module_btf, "could not load module BTF"))
                goto cleanup;

        type_id = btf__find_by_name(module_btf, symbol_name);
        ASSERT_GT(type_id, 0, "func not found");

cleanup:
        btf__free(module_btf);
        btf__free(vmlinux_btf);
}