Alexander Markov
ac7ca17652
To enable bytecode generation, toggle kEnableKernelBytecode flag at the beginning of pkg/vm/lib/bytecode/gen_bytecode.dart. This will also enable generation of bytecode in platform dill files. Also, bytecode generation can be enabled using --gen-bytecode option of pkg/vm/tool/gen_kernel. In kernel binaries, the generated bytecode and constant pool are placed into 'vm.bytecode' metadata attached to members. pkg/vm/tool/dump_kernel tool can be used to disassemble bytecode and print constant pool. Differences between generated bytecode and original DBC are described in pkg/vm/lib/bytecode/dbc.dart. Format of constant pool is described in pkg/vm/lib/bytecode/constant_pool.dart. Currently, only a small subset of Dart language is supported. Bytecode generator will not emit vm.bytecode metadata for a member if its body has an unsupported operation. Change-Id: I27d9a361dc779ea115e5676508ee757c1754e05d Reviewed-on: https://dart-review.googlesource.com/49600 Reviewed-by: Samir Jindel <sjindel@google.com> Reviewed-by: Martin Kustermann <kustermann@google.com> Reviewed-by: Zach Anderson <zra@google.com> Reviewed-by: Régis Crelier <regis@google.com> Commit-Queue: Alexander Markov <alexmarkov@google.com>
49 lines
1.8 KiB
Dart
49 lines
1.8 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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import 'dart:io';
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import 'package:kernel/kernel.dart' show Component, writeComponentToText;
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import 'package:kernel/binary/ast_from_binary.dart'
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show BinaryBuilderWithMetadata;
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import 'package:vm/metadata/bytecode.dart' show BytecodeMetadataRepository;
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import 'package:vm/metadata/direct_call.dart' show DirectCallMetadataRepository;
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import 'package:vm/metadata/inferred_type.dart'
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show InferredTypeMetadataRepository;
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import 'package:vm/metadata/procedure_attributes.dart'
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show ProcedureAttributesMetadataRepository;
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import 'package:vm/metadata/unreachable.dart'
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show UnreachableNodeMetadataRepository;
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final String _usage = '''
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Usage: dump_kernel input.dill output.txt
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Dumps kernel binary file with VM-specific metadata.
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''';
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main(List<String> arguments) async {
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if (arguments.length != 2) {
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print(_usage);
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exit(1);
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}
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final input = arguments[0];
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final output = arguments[1];
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final component = new Component();
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// Register VM-specific metadata.
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component.addMetadataRepository(new DirectCallMetadataRepository());
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component.addMetadataRepository(new InferredTypeMetadataRepository());
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component.addMetadataRepository(new ProcedureAttributesMetadataRepository());
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component.addMetadataRepository(new UnreachableNodeMetadataRepository());
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component.addMetadataRepository(new BytecodeMetadataRepository());
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final List<int> bytes = new File(input).readAsBytesSync();
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new BinaryBuilderWithMetadata(bytes).readComponent(component);
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writeComponentToText(component,
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path: output, showExternal: true, showMetadata: true);
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}
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