Add Kernel Isolate

runtime/tools/kernel-service.dart

+// Copyright (c) 2016, 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.
+
+// This is an interface to the Dart Kernel parser and Kernel binary generator.
+// It is used by the kernel-isolate to load Dart source code and generate
+// Kernel binary format.
+
+import 'dart:isolate';
+import 'dart:async';
+import "dart:io";
+import "dart:typed_data";
+
+import 'package:kernel/binary/ast_to_binary.dart';
+import 'package:kernel/analyzer/loader.dart';
+import 'package:kernel/kernel.dart';
+import 'package:kernel/target/targets.dart';
+
+bool verbose = false;
+
+final RawReceivePort scriptLoadPort = new RawReceivePort();
+
+
+bool checkIsFile(String path) {
+  var stat = new File(path).statSync();
+  switch (stat.type) {
+    case FileSystemEntityType.DIRECTORY:
+      return false;
+    case FileSystemEntityType.NOT_FOUND:
+      return false;
+  }
+  return true;
+}
+
+class DataSink implements StreamSink<List<int>> {
+  var buffer = [];
+  add(List<int> data) {
+    buffer.addAll(data);
+  }
+  close() {
+    // Nothing to do.
+  }
+}
+
+
+List writeProgramToBuffer(Program program) {
+  var sink = new DataSink();
+  try {
+    new BinaryPrinter(sink).writeProgramFile(program);
+  } finally {
+    sink.close();
+  }
+  return new Uint8List.fromList(sink.buffer);
+}
+
+
+Future parseScript(String fileName, String packageConfig, String sdkPath) async {
+
+  if (!checkIsFile(fileName)) {
+    throw "Input file '$fileName' does not exist.";
+  }
+
+  Target target = getTarget("vm", new TargetFlags(strongMode: false));
+  DartOptions dartOptions = new DartOptions(
+        strongMode: false,
+        strongModeSdk: false,
+        sdk: sdkPath,
+        packagePath: packageConfig,
+        customUriMappings: {},
+        declaredVariables: {});
+  DartLoader loader =
+      await new DartLoaderBatch().getLoader(new Repository(), dartOptions);
+  var program = loader.loadProgram(fileName, target: target);
+
+  var errors = loader.errors;
+  if (errors.isNotEmpty) {
+    throw loader.errors.first;
+  }
+
+  // Link program into one file, cf. --link option in dartk
+  target.transformProgram(program);
+
+  return writeProgramToBuffer(program);
+}
+
+
+_processLoadRequest(request) {
+  if (verbose) {
+    print("FROM DART KERNEL: load request: $request");
+    print("FROM DART KERNEL: package: ${Platform.packageConfig}");
+    print("FROM DART KERNEL: exec: ${Platform.resolvedExecutable}");
+  }
+  int tag = request[0];
+  SendPort sp = request[1];
+  String inputFileUrl = request[2];
+  Uri scriptUri = Uri.parse(inputFileUrl);
+  Uri packagesUri = Uri.parse(Platform.packageConfig ?? ".packages");
+  Uri patched_sdk = Uri.parse(Platform.resolvedExecutable).resolve("patched_sdk");
+
+  var parsingDone = parseScript(scriptUri.path, packagesUri.path, patched_sdk.path);
+
+  parsingDone
+    .then((data) {
+        var msg = new List(5);
+        msg[0] = tag;
+        msg[1] = inputFileUrl;
+        msg[2] = inputFileUrl;
+        msg[3] = null;
+        msg[4] = data;
+        sp.send(msg);
+        return;
+    })
+    .catchError((e) {
+        var msg = new List(5);
+        msg[0] = -tag;
+        msg[1] = inputFileUrl;
+        msg[2] = inputFileUrl;
+        msg[3] = null;
+        msg[4] = e.toString();
+        sp.send(msg);
+    });
+}
+
+
+main() {
+  scriptLoadPort.handler = _processLoadRequest;
+  Timer.run(() {});
+  return scriptLoadPort;
+}