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sky_packager is a tool that generates a Dart script snapshot for Dart files intended to run with dart:sky. I plan to use this tool to experiment with startup performance. R=jackson@google.com Review URL: https://codereview.chromium.org/1178213003.
59 lines
1.7 KiB
C++
59 lines
1.7 KiB
C++
// Copyright 2015 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include <iostream>
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#include "base/at_exit.h"
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#include "base/basictypes.h"
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#include "base/command_line.h"
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#include "base/files/file_path.h"
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#include "base/files/file_util.h"
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#include "base/logging.h"
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#include "base/process/memory.h"
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#include "dart/runtime/include/dart_api.h"
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#include "sky/tools/packager/loader.h"
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#include "sky/tools/packager/logging.h"
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#include "sky/tools/packager/scope.h"
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#include "sky/tools/packager/switches.h"
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#include "sky/tools/packager/vm.h"
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void WriteSnapshot(base::FilePath path) {
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uint8_t* buffer;
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intptr_t size;
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CHECK(!LogIfError(Dart_CreateScriptSnapshot(&buffer, &size)));
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CHECK_EQ(base::WriteFile(path, reinterpret_cast<const char*>(buffer), size),
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size);
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std::cout << "Successfully wrote snapshot to " << path.LossyDisplayName()
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<< " (" << size << " bytes)." << std::endl;
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}
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int main(int argc, const char* argv[]) {
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base::AtExitManager exit_manager;
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base::EnableTerminationOnHeapCorruption();
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base::CommandLine::Init(argc, argv);
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InitDartVM();
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Dart_Isolate isolate = CreateDartIsolate();
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CHECK(isolate);
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const base::CommandLine& command_line =
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*base::CommandLine::ForCurrentProcess();
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DartIsolateScope scope(isolate);
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DartApiScope api_scope;
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auto args = command_line.GetArgs();
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CHECK(args.size() == 1);
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LoadScript(args[0]);
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CHECK(!LogIfError(Dart_FinalizeLoading(true)));
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CHECK(command_line.HasSwitch(kSnapshot)) << "Need --snapshot";
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WriteSnapshot(command_line.GetSwitchValuePath(kSnapshot));
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return 0;
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}
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