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// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) Meta Platforms, Inc. and affiliates. */
#include <test_progs.h>
#include "test_subskeleton.skel.h"
#include "test_subskeleton_lib.subskel.h"
static void subskeleton_lib_setup(struct bpf_object *obj)
{
struct test_subskeleton_lib *lib = test_subskeleton_lib__open(obj);
if (!ASSERT_OK_PTR(lib, "open subskeleton"))
return;
*lib->rodata.var1 = 1;
*lib->data.var2 = 2;
lib->bss.var3->var3_1 = 3;
lib->bss.var3->var3_2 = 4;
test_subskeleton_lib__destroy(lib);
}
static int subskeleton_lib_subresult(struct bpf_object *obj)
{
struct test_subskeleton_lib *lib = test_subskeleton_lib__open(obj);
int result;
if (!ASSERT_OK_PTR(lib, "open subskeleton"))
return -EINVAL;
result = *lib->bss.libout1;
ASSERT_EQ(result, 1 + 2 + 3 + 4 + 5 + 6, "lib subresult");
ASSERT_OK_PTR(lib->progs.lib_perf_handler, "lib_perf_handler");
ASSERT_STREQ(bpf_program__name(lib->progs.lib_perf_handler),
"lib_perf_handler", "program name");
ASSERT_OK_PTR(lib->maps.map1, "map1");
ASSERT_STREQ(bpf_map__name(lib->maps.map1), "map1", "map name");
ASSERT_EQ(*lib->data.var5, 5, "__weak var5");
ASSERT_EQ(*lib->data.var6, 6, "extern var6");
ASSERT_TRUE(*lib->kconfig.CONFIG_BPF_SYSCALL, "CONFIG_BPF_SYSCALL");
test_subskeleton_lib__destroy(lib);
return result;
}
/* initialize and load through skeleton, then instantiate subskeleton out of it */
static void subtest_skel_subskeleton(void)
{
int err, result;
struct test_subskeleton *skel;
skel = test_subskeleton__open();
if (!ASSERT_OK_PTR(skel, "skel_open"))
return;
skel->rodata->rovar1 = 10;
skel->rodata->var1 = 1;
subskeleton_lib_setup(skel->obj);
err = test_subskeleton__load(skel);
if (!ASSERT_OK(err, "skel_load"))
goto cleanup;
err = test_subskeleton__attach(skel);
if (!ASSERT_OK(err, "skel_attach"))
goto cleanup;
/* trigger tracepoint */
usleep(1);
result = subskeleton_lib_subresult(skel->obj) * 10;
ASSERT_EQ(skel->bss->out1, result, "unexpected calculation");
cleanup:
test_subskeleton__destroy(skel);
}
/* initialize and load through generic bpf_object API, then instantiate subskeleton out of it */
static void subtest_obj_subskeleton(void)
{
int err, result;
const void *elf_bytes;
size_t elf_bytes_sz = 0, rodata_sz = 0, bss_sz = 0;
struct bpf_object *obj;
const struct bpf_map *map;
const struct bpf_program *prog;
struct bpf_link *link = NULL;
struct test_subskeleton__rodata *rodata;
struct test_subskeleton__bss *bss;
elf_bytes = test_subskeleton__elf_bytes(&elf_bytes_sz);
if (!ASSERT_OK_PTR(elf_bytes, "elf_bytes"))
return;
obj = bpf_object__open_mem(elf_bytes, elf_bytes_sz, NULL);
if (!ASSERT_OK_PTR(obj, "obj_open_mem"))
return;
map = bpf_object__find_map_by_name(obj, ".rodata");
if (!ASSERT_OK_PTR(map, "rodata_map_by_name"))
goto cleanup;
rodata = bpf_map__initial_value(map, &rodata_sz);
if (!ASSERT_OK_PTR(rodata, "rodata_get"))
goto cleanup;
rodata->rovar1 = 10;
rodata->var1 = 1;
subskeleton_lib_setup(obj);
err = bpf_object__load(obj);
if (!ASSERT_OK(err, "obj_load"))
goto cleanup;
prog = bpf_object__find_program_by_name(obj, "handler1");
if (!ASSERT_OK_PTR(prog, "prog_by_name"))
goto cleanup;
link = bpf_program__attach(prog);
if (!ASSERT_OK_PTR(link, "prog_attach"))
goto cleanup;
/* trigger tracepoint */
usleep(1);
map = bpf_object__find_map_by_name(obj, ".bss");
if (!ASSERT_OK_PTR(map, "bss_map_by_name"))
goto cleanup;
bss = bpf_map__initial_value(map, &bss_sz);
if (!ASSERT_OK_PTR(rodata, "rodata_get"))
goto cleanup;
result = subskeleton_lib_subresult(obj) * 10;
ASSERT_EQ(bss->out1, result, "out1");
cleanup:
bpf_link__destroy(link);
bpf_object__close(obj);
}
void test_subskeleton(void)
{
if (test__start_subtest("skel_subskel"))
subtest_skel_subskeleton();
if (test__start_subtest("obj_subskel"))
subtest_obj_subskeleton();
}
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