| // Copyright (c) 2019, the Dart project authors. Please see the AUTHORS file |
| // for details. 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:io'; |
| import 'dylib_utils.dart'; |
| import 'dart:ffi'; |
| import 'dart:io' show Platform; |
| |
| DynamicLibrary ffiTestFunctions = dlopenPlatformSpecific("ffi_test_functions"); |
| |
| abstract class GCWatcher { |
| factory GCWatcher() => _GCWatcherImpl(); |
| factory GCWatcher.dummy() => _MockGCWatcher(); |
| factory GCWatcher.ifAvailable() => |
| Platform.isWindows ? GCWatcher.dummy() : GCWatcher(); |
| |
| Future<int> size(); |
| void dispose(); |
| } |
| |
| // Requires --verbose-gc. |
| class _GCWatcherImpl implements GCWatcher { |
| int _suffix; |
| |
| Future<int> size() async { |
| return await File("/tmp/captured_stderr_$_suffix").length(); |
| } |
| |
| _GCWatcherImpl() { |
| print("Starting..."); |
| _suffix = ffiTestFunctions |
| .lookupFunction<Int32 Function(), int Function()>("RedirectStderr")(); |
| } |
| |
| dispose() { |
| try { |
| File("/tmp/captured_stderr_$_suffix").deleteSync(); |
| } catch (e) { |
| print("deleting file failed"); |
| } |
| } |
| } |
| |
| class _MockGCWatcher implements GCWatcher { |
| int _ctr = 0; |
| |
| Future<int> size() async => ++_ctr; |
| dispose() {} |
| } |