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| 1 // Copyright (c) 2016, the Dart project authors. Please see the AUTHORS file | |
| 2 // for details. All rights reserved. Use of this source code is governed by a | |
| 3 // BSD-style license that can be found in the LICENSE file. | |
| 4 | |
| 5 // This is an interface to the Dart Kernel parser and Kernel binary generator. | |
| 6 // It is used by the kernel-isolate to load Dart source code and generate | |
| 7 // Kernel binary format. | |
| 8 | |
| 9 import 'dart:isolate'; | |
| 10 import 'dart:async'; | |
| 11 import 'dart:io'; | |
| 12 import 'dart:typed_data'; | |
| 13 | |
| 14 import 'package:kernel/binary/ast_to_binary.dart'; | |
| 15 import 'package:kernel/analyzer/loader.dart'; | |
| 16 import 'package:kernel/kernel.dart'; | |
| 17 import 'package:kernel/target/targets.dart'; | |
| 18 | |
| 19 const verbose = false; | |
| 20 | |
| 21 class DataSink implements Sink<List<int>> { | |
| 22 final BytesBuilder builder = new BytesBuilder(); | |
| 23 | |
| 24 void add(List<int> data) { | |
| 25 builder.add(data); | |
| 26 } | |
| 27 | |
| 28 void close() { | |
| 29 // Nothing to do. | |
| 30 } | |
| 31 } | |
| 32 | |
| 33 Future<Uint8List> parseScript( | |
| 34 Uri fileName, String packageConfig, String sdkPath) async { | |
| 35 if (!FileSystemEntity.isFileSync(fileName.path)) { | |
| 36 throw "Input file '${fileName.path}' does not exist."; | |
| 37 } | |
| 38 | |
| 39 if (!FileSystemEntity.isDirectorySync(sdkPath)) { | |
| 40 throw "Patched sdk directory not found at $sdkPath"; | |
| 41 } | |
| 42 | |
| 43 Target target = getTarget("vm", new TargetFlags(strongMode: false)); | |
| 44 DartOptions dartOptions = new DartOptions( | |
| 45 strongMode: false, | |
| 46 strongModeSdk: false, | |
| 47 sdk: sdkPath, | |
| 48 packagePath: packageConfig, | |
| 49 customUriMappings: const {}, | |
| 50 declaredVariables: const {}); | |
| 51 DartLoader loader = | |
| 52 await new DartLoaderBatch().getLoader(new Repository(), dartOptions); | |
| 53 var program = loader.loadProgram(fileName, target: target); | |
| 54 | |
| 55 var errors = loader.errors; | |
| 56 if (errors.isNotEmpty) { | |
| 57 throw loader.errors.first; | |
| 58 } | |
| 59 | |
| 60 // Link program into one file, cf. --link option in dartk. | |
| 61 target.transformProgram(program); | |
| 62 | |
| 63 // Write the program to a list of bytes and return it. | |
| 64 var sink = new DataSink(); | |
| 65 new BinaryPrinter(sink).writeProgramFile(program); | |
| 66 return sink.builder.takeBytes(); | |
| 67 } | |
| 68 | |
| 69 Future _processLoadRequest(request) async { | |
| 70 if (verbose) { | |
| 71 print("FROM DART KERNEL: load request: $request"); | |
| 72 print("FROM DART KERNEL: package: ${Platform.packageConfig}"); | |
| 73 print("FROM DART KERNEL: exec: ${Platform.resolvedExecutable}"); | |
| 74 } | |
| 75 | |
| 76 int tag = request[0]; | |
| 77 SendPort port = request[1]; | |
| 78 String inputFileUrl = request[2]; | |
| 79 Uri scriptUri = Uri.parse(inputFileUrl); | |
| 80 Uri packagesUri = Uri.parse(Platform.packageConfig ?? ".packages"); | |
| 81 Uri patchedSdk = | |
| 82 Uri.parse(Platform.resolvedExecutable).resolve("patched_sdk"); | |
| 83 | |
| 84 var result; | |
| 85 try { | |
| 86 result = await parseScript(scriptUri, packagesUri.path, patchedSdk.path); | |
| 87 } catch (error) { | |
| 88 tag = -tag; // Mark reply as an exception. | |
| 89 result = error.toString(); | |
| 90 } | |
| 91 | |
| 92 port.send([tag, inputFileUrl, inputFileUrl, null, result]); | |
| 93 } | |
| 94 | |
| 95 main() => new RawReceivePort()..handler = _processLoadRequest; | |
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Chromium Code Reviews
Issue 2655173002:
Create an app snapshot of the Dart front end. (Closed)
