| 1 | // Copyright 2013 The Flutter Authors. All rights reserved. |
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| 2 | // Use of this source code is governed by a BSD-style license that can be |
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| 3 | // found in the LICENSE file. |
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| 4 | |
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| 5 | #include "flutter/testing/elf_loader.h" |
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| 6 | |
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| 7 | #include <utility> |
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| 8 | |
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| 9 | #include "flutter/fml/file.h" |
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| 10 | #include "flutter/fml/paths.h" |
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| 11 | #include "flutter/runtime/dart_vm.h" |
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| 12 | #include "flutter/testing/testing.h" |
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| 13 | |
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| 14 | namespace flutter { |
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| 15 | namespace testing { |
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| 16 | |
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| 17 | ELFAOTSymbols LoadELFSymbolFromFixturesIfNeccessary(std::string elf_filename) { |
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| 18 | if (!DartVM::IsRunningPrecompiledCode()) { |
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| 19 | return {}; |
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| 20 | } |
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| 21 | |
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| 22 | const auto elf_path = |
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| 23 | fml::paths::JoinPaths(components: {GetFixturesPath(), std::move(elf_filename)}); |
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| 24 | |
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| 25 | if (!fml::IsFile(path: elf_path)) { |
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| 26 | FML_LOG(ERROR) << "App AOT file does not exist for this fixture. Attempts " |
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| 27 | "to launch the Dart VM with these AOT symbols will fail." ; |
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| 28 | return {}; |
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| 29 | } |
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| 30 | |
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| 31 | ELFAOTSymbols symbols; |
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| 32 | |
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| 33 | // Must not be freed. |
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| 34 | const char* error = nullptr; |
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| 35 | |
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| 36 | #if OS_FUCHSIA |
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| 37 | // TODO(gw280): https://github.com/flutter/flutter/issues/50285 |
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| 38 | // Dart doesn't implement Dart_LoadELF on Fuchsia |
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| 39 | auto loaded_elf = nullptr; |
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| 40 | #else |
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| 41 | auto loaded_elf = |
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| 42 | Dart_LoadELF(filename: elf_path.c_str(), // file path |
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| 43 | file_offset: 0, // file offset |
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| 44 | error: &error, // error (out) |
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| 45 | vm_snapshot_data: &symbols.vm_snapshot_data, // vm snapshot data (out) |
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| 46 | vm_snapshot_instrs: &symbols.vm_snapshot_instrs, // vm snapshot instrs (out) |
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| 47 | vm_isolate_data: &symbols.vm_isolate_data, // vm isolate data (out) |
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| 48 | vm_isolate_instrs: &symbols.vm_isolate_instrs // vm isolate instr (out) |
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| 49 | ); |
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| 50 | #endif |
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| 51 | |
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| 52 | if (loaded_elf == nullptr) { |
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| 53 | FML_LOG(ERROR) |
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| 54 | << "Could not fetch AOT symbols from loaded ELF. Attempts " |
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| 55 | "to launch the Dart VM with these AOT symbols will fail. Error: " |
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| 56 | << error; |
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| 57 | return {}; |
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| 58 | } |
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| 59 | |
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| 60 | symbols.loaded_elf.reset(p: loaded_elf); |
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| 61 | |
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| 62 | return symbols; |
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| 63 | } |
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| 64 | |
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| 65 | ELFAOTSymbols LoadELFSplitSymbolFromFixturesIfNeccessary( |
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| 66 | std::string elf_split_filename) { |
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| 67 | if (!DartVM::IsRunningPrecompiledCode()) { |
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| 68 | return {}; |
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| 69 | } |
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| 70 | |
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| 71 | const auto elf_path = |
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| 72 | fml::paths::JoinPaths(components: {GetFixturesPath(), std::move(elf_split_filename)}); |
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| 73 | |
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| 74 | if (!fml::IsFile(path: elf_path)) { |
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| 75 | // We do not log here, as there is no expectation for a split library to |
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| 76 | // exist. |
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| 77 | return {}; |
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| 78 | } |
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| 79 | |
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| 80 | ELFAOTSymbols symbols; |
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| 81 | |
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| 82 | // Must not be freed. |
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| 83 | const char* error = nullptr; |
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| 84 | |
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| 85 | #if OS_FUCHSIA |
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| 86 | // TODO(gw280): https://github.com/flutter/flutter/issues/50285 |
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| 87 | // Dart doesn't implement Dart_LoadELF on Fuchsia |
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| 88 | auto loaded_elf = nullptr; |
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| 89 | #else |
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| 90 | auto loaded_elf = |
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| 91 | Dart_LoadELF(filename: elf_path.c_str(), // file path |
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| 92 | file_offset: 0, // file offset |
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| 93 | error: &error, // error (out) |
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| 94 | vm_snapshot_data: &symbols.vm_snapshot_data, // vm snapshot data (out) |
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| 95 | vm_snapshot_instrs: &symbols.vm_snapshot_instrs, // vm snapshot instrs (out) |
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| 96 | vm_isolate_data: &symbols.vm_isolate_data, // vm isolate data (out) |
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| 97 | vm_isolate_instrs: &symbols.vm_isolate_instrs // vm isolate instr (out) |
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| 98 | ); |
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| 99 | #endif |
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| 100 | |
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| 101 | if (loaded_elf == nullptr) { |
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| 102 | FML_LOG(ERROR) |
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| 103 | << "Could not fetch AOT symbols from loaded ELF. Attempts " |
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| 104 | "to launch the Dart VM with these AOT symbols will fail. Error: " |
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| 105 | << error; |
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| 106 | return {}; |
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| 107 | } |
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| 108 | |
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| 109 | symbols.loaded_elf.reset(p: loaded_elf); |
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| 110 | |
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| 111 | return symbols; |
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| 112 | } |
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| 113 | |
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| 114 | bool PrepareSettingsForAOTWithSymbols(Settings& settings, |
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| 115 | const ELFAOTSymbols& symbols) { |
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| 116 | if (!DartVM::IsRunningPrecompiledCode()) { |
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| 117 | return false; |
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| 118 | } |
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| 119 | settings.vm_snapshot_data = [&]() { |
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| 120 | return std::make_unique<fml::NonOwnedMapping>(args: symbols.vm_snapshot_data, args: 0u); |
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| 121 | }; |
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| 122 | settings.isolate_snapshot_data = [&]() { |
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| 123 | return std::make_unique<fml::NonOwnedMapping>(args: symbols.vm_isolate_data, args: 0u); |
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| 124 | }; |
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| 125 | settings.vm_snapshot_instr = [&]() { |
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| 126 | return std::make_unique<fml::NonOwnedMapping>(args: symbols.vm_snapshot_instrs, |
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| 127 | args: 0u); |
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| 128 | }; |
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| 129 | settings.isolate_snapshot_instr = [&]() { |
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| 130 | return std::make_unique<fml::NonOwnedMapping>(args: symbols.vm_isolate_instrs, |
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| 131 | args: 0u); |
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| 132 | }; |
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| 133 | return true; |
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| 134 | } |
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| 135 | |
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| 136 | } // namespace testing |
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| 137 | } // namespace flutter |
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| 138 | |
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