Commit edce1a24 authored by Hengqi Chen's avatar Hengqi Chen Committed by Andrii Nakryiko
Browse files

selftests/bpf: Test btf__load_vmlinux_btf/btf__load_module_btf APIs 



Add test for btf__load_vmlinux_btf/btf__load_module_btf APIs. The test
loads bpf_testmod module BTF and check existence of a symbol which is
known to exist.

Signed-off-by: default avatarHengqi Chen <hengqi.chen@gmail.com>
Signed-off-by: default avatarAndrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20210815081035.205879-1-hengqi.chen@gmail.com
parent bb571649

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

0 → 100644
+34 −0
Original line number Diff line number Diff line 
/* 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);

}