diff options
Diffstat (limited to 'tools/testing/selftests/bpf/prog_tests/subskeleton.c')
| -rw-r--r-- | tools/testing/selftests/bpf/prog_tests/subskeleton.c | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/prog_tests/subskeleton.c b/tools/testing/selftests/bpf/prog_tests/subskeleton.c new file mode 100644 index 000000000000..fdf13ed0152a --- /dev/null +++ b/tools/testing/selftests/bpf/prog_tests/subskeleton.c @@ -0,0 +1,152 @@ +// 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(); +} |