1cc15a20dSJiri Olsa // SPDX-License-Identifier: GPL-2.0 2cc15a20dSJiri Olsa 3cc15a20dSJiri Olsa #include <linux/err.h> 4cc15a20dSJiri Olsa #include <string.h> 5cc15a20dSJiri Olsa #include <bpf/btf.h> 6cc15a20dSJiri Olsa #include <bpf/libbpf.h> 7cc15a20dSJiri Olsa #include <linux/btf.h> 8cc15a20dSJiri Olsa #include <linux/kernel.h> 9d8dfe5bfSYonghong Song #define CONFIG_DEBUG_INFO_BTF 10cc15a20dSJiri Olsa #include <linux/btf_ids.h> 11cc15a20dSJiri Olsa #include "test_progs.h" 12cc15a20dSJiri Olsa 13cc15a20dSJiri Olsa static int duration; 14cc15a20dSJiri Olsa 15cc15a20dSJiri Olsa struct symbol { 16cc15a20dSJiri Olsa const char *name; 17cc15a20dSJiri Olsa int type; 18cc15a20dSJiri Olsa int id; 19cc15a20dSJiri Olsa }; 20cc15a20dSJiri Olsa 21cc15a20dSJiri Olsa struct symbol test_symbols[] = { 22cc15a20dSJiri Olsa { "unused", BTF_KIND_UNKN, 0 }, 23cc15a20dSJiri Olsa { "S", BTF_KIND_TYPEDEF, -1 }, 24cc15a20dSJiri Olsa { "T", BTF_KIND_TYPEDEF, -1 }, 25cc15a20dSJiri Olsa { "U", BTF_KIND_TYPEDEF, -1 }, 26cc15a20dSJiri Olsa { "S", BTF_KIND_STRUCT, -1 }, 27cc15a20dSJiri Olsa { "U", BTF_KIND_UNION, -1 }, 28cc15a20dSJiri Olsa { "func", BTF_KIND_FUNC, -1 }, 29cc15a20dSJiri Olsa }; 30cc15a20dSJiri Olsa 310f12e584SYonghong Song BTF_ID_LIST(test_list_local) 320f12e584SYonghong Song BTF_ID_UNUSED 330f12e584SYonghong Song BTF_ID(typedef, S) 340f12e584SYonghong Song BTF_ID(typedef, T) 350f12e584SYonghong Song BTF_ID(typedef, U) 360f12e584SYonghong Song BTF_ID(struct, S) 370f12e584SYonghong Song BTF_ID(union, U) 380f12e584SYonghong Song BTF_ID(func, func) 390f12e584SYonghong Song 400f12e584SYonghong Song extern __u32 test_list_global[]; 410f12e584SYonghong Song BTF_ID_LIST_GLOBAL(test_list_global) 42cc15a20dSJiri Olsa BTF_ID_UNUSED 43cc15a20dSJiri Olsa BTF_ID(typedef, S) 44cc15a20dSJiri Olsa BTF_ID(typedef, T) 45cc15a20dSJiri Olsa BTF_ID(typedef, U) 46cc15a20dSJiri Olsa BTF_ID(struct, S) 47cc15a20dSJiri Olsa BTF_ID(union, U) 48cc15a20dSJiri Olsa BTF_ID(func, func) 49cc15a20dSJiri Olsa 50cd04b04dSJiri Olsa BTF_SET_START(test_set) 51cd04b04dSJiri Olsa BTF_ID(typedef, S) 52cd04b04dSJiri Olsa BTF_ID(typedef, T) 53cd04b04dSJiri Olsa BTF_ID(typedef, U) 54cd04b04dSJiri Olsa BTF_ID(struct, S) 55cd04b04dSJiri Olsa BTF_ID(union, U) 56cd04b04dSJiri Olsa BTF_ID(func, func) 57cd04b04dSJiri Olsa BTF_SET_END(test_set) 58cd04b04dSJiri Olsa 59cc15a20dSJiri Olsa static int 60cc15a20dSJiri Olsa __resolve_symbol(struct btf *btf, int type_id) 61cc15a20dSJiri Olsa { 62cc15a20dSJiri Olsa const struct btf_type *type; 63cc15a20dSJiri Olsa const char *str; 64cc15a20dSJiri Olsa unsigned int i; 65cc15a20dSJiri Olsa 66cc15a20dSJiri Olsa type = btf__type_by_id(btf, type_id); 67cc15a20dSJiri Olsa if (!type) { 68cc15a20dSJiri Olsa PRINT_FAIL("Failed to get type for ID %d\n", type_id); 69cc15a20dSJiri Olsa return -1; 70cc15a20dSJiri Olsa } 71cc15a20dSJiri Olsa 72cc15a20dSJiri Olsa for (i = 0; i < ARRAY_SIZE(test_symbols); i++) { 73cc15a20dSJiri Olsa if (test_symbols[i].id != -1) 74cc15a20dSJiri Olsa continue; 75cc15a20dSJiri Olsa 76cc15a20dSJiri Olsa if (BTF_INFO_KIND(type->info) != test_symbols[i].type) 77cc15a20dSJiri Olsa continue; 78cc15a20dSJiri Olsa 79cc15a20dSJiri Olsa str = btf__name_by_offset(btf, type->name_off); 80cc15a20dSJiri Olsa if (!str) { 81cc15a20dSJiri Olsa PRINT_FAIL("Failed to get name for BTF ID %d\n", type_id); 82cc15a20dSJiri Olsa return -1; 83cc15a20dSJiri Olsa } 84cc15a20dSJiri Olsa 85cc15a20dSJiri Olsa if (!strcmp(str, test_symbols[i].name)) 86cc15a20dSJiri Olsa test_symbols[i].id = type_id; 87cc15a20dSJiri Olsa } 88cc15a20dSJiri Olsa 89cc15a20dSJiri Olsa return 0; 90cc15a20dSJiri Olsa } 91cc15a20dSJiri Olsa 92cc15a20dSJiri Olsa static int resolve_symbols(void) 93cc15a20dSJiri Olsa { 94cc15a20dSJiri Olsa struct btf *btf; 95cc15a20dSJiri Olsa int type_id; 96cc15a20dSJiri Olsa __u32 nr; 97cc15a20dSJiri Olsa 98cc15a20dSJiri Olsa btf = btf__parse_elf("btf_data.o", NULL); 99cc15a20dSJiri Olsa if (CHECK(libbpf_get_error(btf), "resolve", 100cc15a20dSJiri Olsa "Failed to load BTF from btf_data.o\n")) 101cc15a20dSJiri Olsa return -1; 102cc15a20dSJiri Olsa 103cc15a20dSJiri Olsa nr = btf__get_nr_types(btf); 104cc15a20dSJiri Olsa 105cc15a20dSJiri Olsa for (type_id = 1; type_id <= nr; type_id++) { 106cc15a20dSJiri Olsa if (__resolve_symbol(btf, type_id)) 107cc15a20dSJiri Olsa break; 108cc15a20dSJiri Olsa } 109cc15a20dSJiri Olsa 110cc15a20dSJiri Olsa btf__free(btf); 111cc15a20dSJiri Olsa return 0; 112cc15a20dSJiri Olsa } 113cc15a20dSJiri Olsa 114cc15a20dSJiri Olsa int test_resolve_btfids(void) 115cc15a20dSJiri Olsa { 1160f12e584SYonghong Song __u32 *test_list, *test_lists[] = { test_list_local, test_list_global }; 1170f12e584SYonghong Song unsigned int i, j; 118cc15a20dSJiri Olsa int ret = 0; 119cc15a20dSJiri Olsa 120cc15a20dSJiri Olsa if (resolve_symbols()) 121cc15a20dSJiri Olsa return -1; 122cc15a20dSJiri Olsa 1230f12e584SYonghong Song /* Check BTF_ID_LIST(test_list_local) and 1240f12e584SYonghong Song * BTF_ID_LIST_GLOBAL(test_list_global) IDs 1250f12e584SYonghong Song */ 1260f12e584SYonghong Song for (j = 0; j < ARRAY_SIZE(test_lists); j++) { 1270f12e584SYonghong Song test_list = test_lists[j]; 128cd04b04dSJiri Olsa for (i = 0; i < ARRAY_SIZE(test_symbols); i++) { 129cc15a20dSJiri Olsa ret = CHECK(test_list[i] != test_symbols[i].id, 130cc15a20dSJiri Olsa "id_check", 1310f12e584SYonghong Song "wrong ID for %s (%d != %d)\n", 1320f12e584SYonghong Song test_symbols[i].name, 133cc15a20dSJiri Olsa test_list[i], test_symbols[i].id); 134cd04b04dSJiri Olsa if (ret) 135cd04b04dSJiri Olsa return ret; 136cd04b04dSJiri Olsa } 137cd04b04dSJiri Olsa } 138cd04b04dSJiri Olsa 139cd04b04dSJiri Olsa /* Check BTF_SET_START(test_set) IDs */ 140cd04b04dSJiri Olsa for (i = 0; i < test_set.cnt; i++) { 141cd04b04dSJiri Olsa bool found = false; 142cd04b04dSJiri Olsa 143cd04b04dSJiri Olsa for (j = 0; j < ARRAY_SIZE(test_symbols); j++) { 144cd04b04dSJiri Olsa if (test_symbols[j].id != test_set.ids[i]) 145cd04b04dSJiri Olsa continue; 146cd04b04dSJiri Olsa found = true; 147cd04b04dSJiri Olsa break; 148cd04b04dSJiri Olsa } 149cd04b04dSJiri Olsa 150cd04b04dSJiri Olsa ret = CHECK(!found, "id_check", 151cd04b04dSJiri Olsa "ID %d not found in test_symbols\n", 152cd04b04dSJiri Olsa test_set.ids[i]); 153cd04b04dSJiri Olsa if (ret) 154cd04b04dSJiri Olsa break; 155cd04b04dSJiri Olsa 156cd04b04dSJiri Olsa if (i > 0) { 157cd04b04dSJiri Olsa ret = CHECK(test_set.ids[i - 1] > test_set.ids[i], 158cd04b04dSJiri Olsa "sort_check", 159cd04b04dSJiri Olsa "test_set is not sorted\n"); 160cd04b04dSJiri Olsa if (ret) 161cd04b04dSJiri Olsa break; 162cc15a20dSJiri Olsa } 1630f12e584SYonghong Song } 164cc15a20dSJiri Olsa 165cc15a20dSJiri Olsa return ret; 166cc15a20dSJiri Olsa } 167