diff options
Diffstat (limited to '')
-rw-r--r-- | tools/testing/selftests/bpf/prog_tests/test_global_funcs.c | 210 |
1 files changed, 145 insertions, 65 deletions
diff --git a/tools/testing/selftests/bpf/prog_tests/test_global_funcs.c b/tools/testing/selftests/bpf/prog_tests/test_global_funcs.c index 193002b14d7f..e905cbaf6b3d 100644 --- a/tools/testing/selftests/bpf/prog_tests/test_global_funcs.c +++ b/tools/testing/selftests/bpf/prog_tests/test_global_funcs.c @@ -1,82 +1,162 @@ // SPDX-License-Identifier: GPL-2.0 /* Copyright (c) 2020 Facebook */ #include <test_progs.h> +#include "test_global_func1.skel.h" +#include "test_global_func2.skel.h" +#include "test_global_func3.skel.h" +#include "test_global_func4.skel.h" +#include "test_global_func5.skel.h" +#include "test_global_func6.skel.h" +#include "test_global_func7.skel.h" +#include "test_global_func8.skel.h" +#include "test_global_func9.skel.h" +#include "test_global_func10.skel.h" +#include "test_global_func11.skel.h" +#include "test_global_func12.skel.h" +#include "test_global_func13.skel.h" +#include "test_global_func14.skel.h" +#include "test_global_func15.skel.h" +#include "test_global_func16.skel.h" +#include "test_global_func17.skel.h" +#include "test_global_func_ctx_args.skel.h" -const char *err_str; -bool found; +#include "bpf/libbpf_internal.h" +#include "btf_helpers.h" -static int libbpf_debug_print(enum libbpf_print_level level, - const char *format, va_list args) +static void check_ctx_arg_type(const struct btf *btf, const struct btf_param *p) { - char *log_buf; + const struct btf_type *t; + const char *s; - if (level != LIBBPF_WARN || - strcmp(format, "libbpf: \n%s\n")) { - vprintf(format, args); - return 0; + t = btf__type_by_id(btf, p->type); + if (!ASSERT_EQ(btf_kind(t), BTF_KIND_PTR, "ptr_t")) + return; + + s = btf_type_raw_dump(btf, t->type); + if (!ASSERT_HAS_SUBSTR(s, "STRUCT 'bpf_perf_event_data' size=0 vlen=0", + "ctx_struct_t")) + return; +} + +static void subtest_ctx_arg_rewrite(void) +{ + struct test_global_func_ctx_args *skel = NULL; + struct bpf_prog_info info; + char func_info_buf[1024] __attribute__((aligned(8))); + struct bpf_func_info_min *rec; + struct btf *btf = NULL; + __u32 info_len = sizeof(info); + int err, fd, i; + struct btf *kern_btf = NULL; + + kern_btf = btf__load_vmlinux_btf(); + if (!ASSERT_OK_PTR(kern_btf, "kern_btf_load")) + return; + + /* simple detection of kernel native arg:ctx tag support */ + if (btf__find_by_name_kind(kern_btf, "bpf_subprog_arg_info", BTF_KIND_STRUCT) > 0) { + test__skip(); + btf__free(kern_btf); + return; } + btf__free(kern_btf); + + skel = test_global_func_ctx_args__open(); + if (!ASSERT_OK_PTR(skel, "skel_open")) + return; - log_buf = va_arg(args, char *); - if (!log_buf) + bpf_program__set_autoload(skel->progs.arg_tag_ctx_perf, true); + + err = test_global_func_ctx_args__load(skel); + if (!ASSERT_OK(err, "skel_load")) goto out; - if (err_str && strstr(log_buf, err_str) == 0) - found = true; -out: - printf(format, log_buf); - return 0; -} -extern int extra_prog_load_log_flags; + memset(&info, 0, sizeof(info)); + info.func_info = ptr_to_u64(&func_info_buf); + info.nr_func_info = 3; + info.func_info_rec_size = sizeof(struct bpf_func_info_min); -static int check_load(const char *file) -{ - struct bpf_prog_load_attr attr; - struct bpf_object *obj = NULL; - int err, prog_fd; - - memset(&attr, 0, sizeof(struct bpf_prog_load_attr)); - attr.file = file; - attr.prog_type = BPF_PROG_TYPE_UNSPEC; - attr.log_level = extra_prog_load_log_flags; - attr.prog_flags = BPF_F_TEST_RND_HI32; - found = false; - err = bpf_prog_load_xattr(&attr, &obj, &prog_fd); - bpf_object__close(obj); - return err; -} + fd = bpf_program__fd(skel->progs.arg_tag_ctx_perf); + err = bpf_prog_get_info_by_fd(fd, &info, &info_len); + if (!ASSERT_OK(err, "prog_info")) + goto out; + + if (!ASSERT_EQ(info.nr_func_info, 3, "nr_func_info")) + goto out; + + btf = btf__load_from_kernel_by_id(info.btf_id); + if (!ASSERT_OK_PTR(btf, "obj_kern_btf")) + goto out; + + rec = (struct bpf_func_info_min *)func_info_buf; + for (i = 0; i < info.nr_func_info; i++, rec = (void *)rec + info.func_info_rec_size) { + const struct btf_type *fn_t, *proto_t; + const char *name; + + if (rec->insn_off == 0) + continue; /* main prog, skip */ + + fn_t = btf__type_by_id(btf, rec->type_id); + if (!ASSERT_OK_PTR(fn_t, "fn_type")) + goto out; + if (!ASSERT_EQ(btf_kind(fn_t), BTF_KIND_FUNC, "fn_type_kind")) + goto out; + proto_t = btf__type_by_id(btf, fn_t->type); + if (!ASSERT_OK_PTR(proto_t, "proto_type")) + goto out; + + name = btf__name_by_offset(btf, fn_t->name_off); + if (strcmp(name, "subprog_ctx_tag") == 0) { + /* int subprog_ctx_tag(void *ctx __arg_ctx) */ + if (!ASSERT_EQ(btf_vlen(proto_t), 1, "arg_cnt")) + goto out; -struct test_def { - const char *file; - const char *err_str; -}; + /* arg 0 is PTR -> STRUCT bpf_perf_event_data */ + check_ctx_arg_type(btf, &btf_params(proto_t)[0]); + } else if (strcmp(name, "subprog_multi_ctx_tags") == 0) { + /* int subprog_multi_ctx_tags(void *ctx1 __arg_ctx, + * struct my_struct *mem, + * void *ctx2 __arg_ctx) + */ + if (!ASSERT_EQ(btf_vlen(proto_t), 3, "arg_cnt")) + goto out; + + /* arg 0 is PTR -> STRUCT bpf_perf_event_data */ + check_ctx_arg_type(btf, &btf_params(proto_t)[0]); + /* arg 2 is PTR -> STRUCT bpf_perf_event_data */ + check_ctx_arg_type(btf, &btf_params(proto_t)[2]); + } else { + ASSERT_FAIL("unexpected subprog %s", name); + goto out; + } + } + +out: + btf__free(btf); + test_global_func_ctx_args__destroy(skel); +} void test_test_global_funcs(void) { - struct test_def tests[] = { - { "test_global_func1.o", "combined stack size of 4 calls is 544" }, - { "test_global_func2.o" }, - { "test_global_func3.o" , "the call stack of 8 frames" }, - { "test_global_func4.o" }, - { "test_global_func5.o" , "expected pointer to ctx, but got PTR" }, - { "test_global_func6.o" , "modified ctx ptr R2" }, - { "test_global_func7.o" , "foo() doesn't return scalar" }, - }; - libbpf_print_fn_t old_print_fn = NULL; - int err, i, duration = 0; - - old_print_fn = libbpf_set_print(libbpf_debug_print); - - for (i = 0; i < ARRAY_SIZE(tests); i++) { - const struct test_def *test = &tests[i]; - - if (!test__start_subtest(test->file)) - continue; - - err_str = test->err_str; - err = check_load(test->file); - CHECK_FAIL(!!err ^ !!err_str); - if (err_str) - CHECK(found, "", "expected string '%s'", err_str); - } - libbpf_set_print(old_print_fn); + RUN_TESTS(test_global_func1); + RUN_TESTS(test_global_func2); + RUN_TESTS(test_global_func3); + RUN_TESTS(test_global_func4); + RUN_TESTS(test_global_func5); + RUN_TESTS(test_global_func6); + RUN_TESTS(test_global_func7); + RUN_TESTS(test_global_func8); + RUN_TESTS(test_global_func9); + RUN_TESTS(test_global_func10); + RUN_TESTS(test_global_func11); + RUN_TESTS(test_global_func12); + RUN_TESTS(test_global_func13); + RUN_TESTS(test_global_func14); + RUN_TESTS(test_global_func15); + RUN_TESTS(test_global_func16); + RUN_TESTS(test_global_func17); + RUN_TESTS(test_global_func_ctx_args); + + if (test__start_subtest("ctx_arg_rewrite")) + subtest_ctx_arg_rewrite(); } |