Peter von der Ahé
fe39691269
Fixes https://github.com/dart-lang/sdk/issues/34548 Change-Id: Ia6b4a3cdc4b6c39e0aa0fb649940b2bd126a619e Reviewed-on: https://dart-review.googlesource.com/76120 Reviewed-by: Jens Johansen <jensj@google.com> Commit-Queue: Peter von der Ahé <ahe@google.com>
83 lines
2.9 KiB
Dart
83 lines
2.9 KiB
Dart
// Copyright (c) 2017, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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/// Utility to dump a truncated .dill file generated by the incremental kernel
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/// generator or by the VM's kernel service.
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import 'dart:io' show File, exitCode;
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import 'package:kernel/kernel.dart'
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show
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Component,
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loadComponentFromBinary,
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loadComponentFromBytes,
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writeComponentToText;
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import 'package:front_end/src/fasta/kernel/utils.dart' show serializeComponent;
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main(List<String> args) {
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if (args.length == 0) {
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print('usage: pkg/front_end/tool/fasta dump_partial '
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'partial.dill [extra1.dill] ... [extraN.dill]');
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exitCode = 1;
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return;
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}
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var component = _loadComponent(args);
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writeComponentToText(component);
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}
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/// Creates a component that contains all of the context code marked as
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/// external, and all libraries defined in partial.dill as they are written in
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/// that file.
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Component _loadComponent(List<String> args) {
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List<int> partialInput = new File(args[0]).readAsBytesSync();
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var context = new Component();
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for (var i = 1; i < args.length; i++) {
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loadComponentFromBinary(args[i], context);
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}
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Set<Uri> libraries = _definedLibraries(partialInput, context);
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// By default `package:kernel/binary/ast_from_binary.dart` merges the contents
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// of libraries that are mentioned in more than one .dill file. In order to
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// keep the contents of partial.dill intact, we build a new context that
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// excludes those libraries defined in partial.dill.
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List<int> contextBytes = serializeComponent(context,
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filter: (l) => !libraries.contains(l.importUri));
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var component = new Component();
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loadComponentFromBytes(contextBytes, component);
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_updateIsExternal(component, true);
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loadComponentFromBytes(partialInput, component);
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return component;
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}
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/// Compute the set of libraries defined in [partialDill].
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///
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/// The [context] component contains all other libraries that may be needed to
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/// properly deserialize partialDill.
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///
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/// Note: This function will mutate [context] in place.
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// TODO(sigmund): simplify and get rid of [context]. We could do that with a
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// custom deserialization, but it will be easier to do once .dill has
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// random-access support.
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Set<Uri> _definedLibraries(List<int> partialDill, Component context) {
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_updateIsExternal(context, true);
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// This implicitly sets `isExternal = false` on all libraries defined in the
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// partial.dill file.
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loadComponentFromBytes(partialDill, context);
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var result = context.libraries
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.where((l) => !l.isExternal)
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.map((l) => l.importUri)
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.toSet();
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_updateIsExternal(context, false);
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return result;
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}
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void _updateIsExternal(Component component, bool toValue) {
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component.libraries.forEach((lib) => lib.isExternal = toValue);
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}
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