| /* |
| * Copyright (C) 2015 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #include "read_elf.h" |
| |
| #include <gtest/gtest.h> |
| |
| #include <map> |
| |
| #include <android-base/file.h> |
| #include <android-base/test_utils.h> |
| |
| #include "get_test_data.h" |
| #include "test_util.h" |
| #include "utils.h" |
| |
| #define ELF_NOTE_GNU "GNU" |
| #define NT_GNU_BUILD_ID 3 |
| |
| TEST(read_elf, GetBuildIdFromNoteSection) { |
| BuildId build_id; |
| std::vector<char> data; |
| // Fail to read build id for no data. |
| ASSERT_FALSE(GetBuildIdFromNoteSection(data.data(), 0, &build_id)); |
| |
| // Read build id from data starting from different alignment addresses. |
| char build_id_data[20]; |
| for (int i = 0; i < 20; ++i) { |
| build_id_data[i] = i; |
| } |
| BuildId expected_build_id(build_id_data, 20); |
| data.resize(100, '\0'); |
| |
| for (size_t alignment = 0; alignment <= 3; ++alignment) { |
| char* start = data.data() + alignment; |
| char* p = start; |
| uint32_t type = NT_GNU_BUILD_ID; |
| uint32_t namesz = 4; |
| uint32_t descsz = 20; |
| MoveToBinaryFormat(namesz, p); |
| MoveToBinaryFormat(descsz, p); |
| MoveToBinaryFormat(type, p); |
| MoveToBinaryFormat(ELF_NOTE_GNU, 4, p); |
| MoveToBinaryFormat(build_id_data, 20, p); |
| ASSERT_TRUE(GetBuildIdFromNoteSection(start, p - start, &build_id)); |
| ASSERT_TRUE(build_id == expected_build_id); |
| } |
| } |
| |
| TEST(read_elf, GetBuildIdFromElfFile) { |
| BuildId build_id; |
| ASSERT_EQ(ElfStatus::NO_ERROR, GetBuildIdFromElfFile(GetTestData(ELF_FILE), &build_id)); |
| ASSERT_EQ(build_id, BuildId(elf_file_build_id)); |
| } |
| |
| TEST(read_elf, GetBuildIdFromEmbeddedElfFile) { |
| BuildId build_id; |
| ASSERT_EQ(ElfStatus::NO_ERROR, GetBuildIdFromEmbeddedElfFile(GetTestData(APK_FILE), NATIVELIB_OFFSET_IN_APK, |
| NATIVELIB_SIZE_IN_APK, &build_id)); |
| ASSERT_EQ(build_id, native_lib_build_id); |
| } |
| |
| void ParseSymbol(const ElfFileSymbol& symbol, std::map<std::string, ElfFileSymbol>* symbols) { |
| (*symbols)[symbol.name] = symbol; |
| } |
| |
| static void CheckGlobalVariableSymbols(const std::map<std::string, ElfFileSymbol>& symbols) { |
| auto pos = symbols.find("GlobalVar"); |
| ASSERT_NE(pos, symbols.end()); |
| ASSERT_FALSE(pos->second.is_func); |
| } |
| |
| static void CheckFunctionSymbols(const std::map<std::string, ElfFileSymbol>& symbols) { |
| auto pos = symbols.find("GlobalFunc"); |
| ASSERT_NE(pos, symbols.end()); |
| ASSERT_TRUE(pos->second.is_func); |
| ASSERT_TRUE(pos->second.is_in_text_section); |
| } |
| |
| void CheckElfFileSymbols(const std::map<std::string, ElfFileSymbol>& symbols) { |
| CheckGlobalVariableSymbols(symbols); |
| CheckFunctionSymbols(symbols); |
| } |
| |
| TEST(read_elf, parse_symbols_from_elf_file_with_correct_build_id) { |
| std::map<std::string, ElfFileSymbol> symbols; |
| ASSERT_EQ(ElfStatus::NO_ERROR, ParseSymbolsFromElfFile(GetTestData(ELF_FILE), elf_file_build_id, |
| std::bind(ParseSymbol, std::placeholders::_1, &symbols))); |
| CheckElfFileSymbols(symbols); |
| } |
| |
| TEST(read_elf, parse_symbols_from_elf_file_without_build_id) { |
| std::map<std::string, ElfFileSymbol> symbols; |
| ASSERT_EQ(ElfStatus::NO_ERROR, ParseSymbolsFromElfFile(GetTestData(ELF_FILE), BuildId(), |
| std::bind(ParseSymbol, std::placeholders::_1, &symbols))); |
| CheckElfFileSymbols(symbols); |
| } |
| |
| TEST(read_elf, parse_symbols_from_elf_file_with_wrong_build_id) { |
| BuildId build_id("01010101010101010101"); |
| std::map<std::string, ElfFileSymbol> symbols; |
| ASSERT_EQ(ElfStatus::BUILD_ID_MISMATCH, ParseSymbolsFromElfFile(GetTestData(ELF_FILE), build_id, |
| std::bind(ParseSymbol, std::placeholders::_1, &symbols))); |
| } |
| |
| TEST(read_elf, ParseSymbolsFromEmbeddedElfFile) { |
| std::map<std::string, ElfFileSymbol> symbols; |
| ASSERT_EQ(ElfStatus::NO_SYMBOL_TABLE, ParseSymbolsFromEmbeddedElfFile(GetTestData(APK_FILE), NATIVELIB_OFFSET_IN_APK, |
| NATIVELIB_SIZE_IN_APK, native_lib_build_id, |
| std::bind(ParseSymbol, std::placeholders::_1, &symbols))); |
| CheckElfFileSymbols(symbols); |
| } |
| |
| TEST(read_elf, ParseSymbolFromMiniDebugInfoElfFile) { |
| std::map<std::string, ElfFileSymbol> symbols; |
| ASSERT_EQ(ElfStatus::NO_ERROR, ParseSymbolsFromElfFile(GetTestData(ELF_FILE_WITH_MINI_DEBUG_INFO), BuildId(), |
| std::bind(ParseSymbol, std::placeholders::_1, &symbols))); |
| CheckFunctionSymbols(symbols); |
| } |
| |
| TEST(read_elf, arm_mapping_symbol) { |
| ASSERT_TRUE(IsArmMappingSymbol("$a")); |
| ASSERT_FALSE(IsArmMappingSymbol("$b")); |
| ASSERT_TRUE(IsArmMappingSymbol("$a.anything")); |
| ASSERT_FALSE(IsArmMappingSymbol("$a_no_dot")); |
| } |
| |
| TEST(read_elf, IsValidElfPath) { |
| ASSERT_NE(ElfStatus::NO_ERROR, IsValidElfPath("/dev/zero")); |
| TemporaryFile tmp_file; |
| ASSERT_EQ(ElfStatus::READ_FAILED, IsValidElfPath(tmp_file.path)); |
| ASSERT_TRUE(android::base::WriteStringToFile("wrong format for elf", tmp_file.path)); |
| ASSERT_EQ(ElfStatus::FILE_MALFORMED, IsValidElfPath(tmp_file.path)); |
| ASSERT_EQ(ElfStatus::NO_ERROR, IsValidElfPath(GetTestData(ELF_FILE))); |
| } |
| |
| TEST(read_elf, check_symbol_for_plt_section) { |
| std::map<std::string, ElfFileSymbol> symbols; |
| ASSERT_EQ(ElfStatus::NO_ERROR, ParseSymbolsFromElfFile(GetTestData(ELF_FILE), BuildId(), |
| std::bind(ParseSymbol, std::placeholders::_1, &symbols))); |
| ASSERT_NE(symbols.find("@plt"), symbols.end()); |
| } |
| |
| TEST(read_elf, read_elf_with_broken_section_table) { |
| std::string elf_path = GetTestData("libsgmainso-6.4.36.so"); |
| std::map<std::string, ElfFileSymbol> symbols; |
| ASSERT_EQ(ElfStatus::NO_SYMBOL_TABLE, |
| ParseSymbolsFromElfFile(elf_path, BuildId(), |
| std::bind(ParseSymbol, std::placeholders::_1, &symbols))); |
| BuildId build_id; |
| ASSERT_EQ(ElfStatus::NO_BUILD_ID, GetBuildIdFromElfFile(elf_path, &build_id)); |
| uint64_t min_vaddr; |
| ASSERT_EQ(ElfStatus::NO_ERROR, ReadMinExecutableVirtualAddressFromElfFile(elf_path, BuildId(), |
| &min_vaddr)); |
| ASSERT_EQ(min_vaddr, 0u); |
| } |