Ryan Macnak
108fe63a20
Allow for segment padding when testing that strip decreases snapshot size.
Cf. bc21edaf17.
TEST=ci
Bug: https://github.com/dart-lang/sdk/issues/42773
Change-Id: Icf533b2caa756488e17856495f3877fb779d2faf
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/196040
Commit-Queue: Ryan Macnak <rmacnak@google.com>
Reviewed-by: Alexander Markov <alexmarkov@google.com>
85 lines
2.6 KiB
Dart
85 lines
2.6 KiB
Dart
// Copyright (c) 2019, 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 'dart:typed_data';
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// Maximum page size across all supported architectures (arm64 macOS has 16K
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// pages, the rest are all 4k pages).
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const elfPageSize = 16384;
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const appjitMagicNumber = <int>[0xdc, 0xdc, 0xf6, 0xf6, 0, 0, 0, 0];
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enum Kind { aot, exe }
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Future writeAppendedExecutable(
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String dartaotruntimePath, String payloadPath, String outputPath) async {
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final dartaotruntime = File(dartaotruntimePath);
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final int dartaotruntimeLength = dartaotruntime.lengthSync();
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final padding = ((elfPageSize - dartaotruntimeLength) % elfPageSize);
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final padBytes = Uint8List(padding);
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final offset = dartaotruntimeLength + padding;
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// Note: The offset is always Little Endian regardless of host.
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final offsetBytes = ByteData(8) // 64 bit in bytes.
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..setUint64(0, offset, Endian.little);
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final outputFile = File(outputPath).openWrite();
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outputFile.add(dartaotruntime.readAsBytesSync());
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outputFile.add(padBytes);
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outputFile.add(File(payloadPath).readAsBytesSync());
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outputFile.add(offsetBytes.buffer.asUint8List());
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outputFile.add(appjitMagicNumber);
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await outputFile.close();
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}
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Future markExecutable(String outputFile) {
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return Process.run('chmod', ['+x', outputFile]);
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}
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Future<ProcessResult> generateAotKernel(
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String dart,
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String genKernel,
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String platformDill,
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String sourceFile,
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String kernelFile,
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String packages,
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List<String> defines,
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{String enableExperiment = '',
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List<String> extraGenKernelOptions = const []}) {
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return Process.run(dart, [
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genKernel,
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'--platform',
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platformDill,
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if (enableExperiment.isNotEmpty) '--enable-experiment=${enableExperiment}',
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'--aot',
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'-Ddart.vm.product=true',
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...(defines.map((d) => '-D${d}')),
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if (packages != null) ...['--packages', packages],
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'-o',
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kernelFile,
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...extraGenKernelOptions,
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sourceFile
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]);
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}
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Future generateAotSnapshot(
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String genSnapshot,
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String kernelFile,
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String snapshotFile,
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String debugFile,
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bool enableAsserts,
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List<String> extraGenSnapshotOptions) {
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return Process.run(genSnapshot, [
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'--snapshot-kind=app-aot-elf',
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'--elf=${snapshotFile}',
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if (debugFile != null) '--save-debugging-info=$debugFile',
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if (debugFile != null) '--dwarf-stack-traces',
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if (debugFile != null) '--strip',
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if (enableAsserts) '--enable-asserts',
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...extraGenSnapshotOptions,
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kernelFile
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]);
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}
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