| // Copyright 2014 The Flutter Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| import 'dart:async'; |
| import 'dart:convert'; |
| |
| import 'utils.dart'; |
| |
| void _checkExitCode(int code) { |
| if (code != 0) { |
| throw Exception( |
| 'Unexpected exit code = $code!', |
| ); |
| } |
| } |
| |
| Future<void> _execAndCheck(String executable, List<String> args) async { |
| _checkExitCode(await exec(executable, args)); |
| } |
| |
| // Measure the CPU/GPU percentage for [duration] while a Flutter app is running |
| // on an iOS device (e.g., right after a Flutter driver test has finished, which |
| // doesn't close the Flutter app, and the Flutter app has an indefinite |
| // animation). The return should have a format like the following json |
| // ``` |
| // {"gpu_percentage":12.6,"cpu_percentage":18.15} |
| // ``` |
| Future<Map<String, dynamic>> measureIosCpuGpu({ |
| Duration duration = const Duration(seconds: 10), |
| String deviceId, |
| }) async { |
| await _execAndCheck('pub', <String>[ |
| 'global', |
| 'activate', |
| 'gauge', |
| '0.1.5', |
| ]); |
| |
| await _execAndCheck('pub', <String>[ |
| 'global', |
| 'run', |
| 'gauge', |
| 'ioscpugpu', |
| 'new', |
| if (deviceId != null) ...<String>['-w', deviceId], |
| '-l', |
| '${duration.inMilliseconds}', |
| ]); |
| return json.decode(file('$cwd/result.json').readAsStringSync()) as Map<String, dynamic>; |
| } |
| |
| Future<String> dylibSymbols(String pathToDylib) { |
| return eval('nm', <String>['-g', pathToDylib]); |
| } |
| |
| Future<String> fileType(String pathToBinary) { |
| return eval('file', <String>[pathToBinary]); |
| } |
| |
| Future<bool> containsBitcode(String pathToBinary) async { |
| // See: https://stackoverflow.com/questions/32755775/how-to-check-a-static-library-is-built-contain-bitcode |
| final String loadCommands = await eval('otool', <String>[ |
| '-l', |
| pathToBinary, |
| ]); |
| if (!loadCommands.contains('__LLVM')) { |
| return false; |
| } |
| // Presence of the section may mean a bitcode marker was embedded (size=1), but there is no content. |
| if (!loadCommands.contains('size 0x0000000000000001')) { |
| return true; |
| } |
| // Check the false positives: size=1 wasn't referencing the __LLVM section. |
| |
| bool emptyBitcodeMarkerFound = false; |
| // Section |
| // sectname __bundle |
| // segname __LLVM |
| // addr 0x003c4000 |
| // size 0x0042b633 |
| // offset 3932160 |
| // ... |
| final List<String> lines = LineSplitter.split(loadCommands).toList(); |
| lines.asMap().forEach((int index, String line) { |
| if (line.contains('segname __LLVM') && lines.length - index - 1 > 3) { |
| final String emptyBitcodeMarker = lines |
| .skip(index - 1) |
| .take(3) |
| .firstWhere( |
| (String line) => line.contains(' size 0x0000000000000001'), |
| orElse: () => null, |
| ); |
| if (emptyBitcodeMarker != null) { |
| emptyBitcodeMarkerFound = true; |
| return; |
| } |
| } |
| }); |
| return !emptyBitcodeMarkerFound; |
| } |