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Add support for generating needed v8_context_snapshot.bin
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John Kleinschmidt
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Dec 4, 2018
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,30 +1,101 @@ | ||
| #!/usr/bin/env node | ||
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| var ChildProcess = require('child_process') | ||
| var path = require('path') | ||
| const fs = require('fs') | ||
| const { spawnSync } = require('child_process') | ||
| const path = require('path') | ||
| const temp = require('temp').track() | ||
| const workingDir = temp.mkdirSync('mksnapshot-workdir') | ||
|
|
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| var command = path.join(__dirname, 'bin', 'mksnapshot') | ||
| var args = process.argv.slice(2) | ||
| var options = { | ||
| cwd: process.cwd(), | ||
| /* | ||
| * Copy mksnapshot files to temporary working directory because | ||
| * v8_context_snapshot_generator expects to run everything from the same | ||
| * directory. | ||
| */ | ||
| function copyMksnapshotFiles (mksnapshotDir, workingDir) { | ||
| const mksnapshotFiles = fs.readdirSync(mksnapshotDir) | ||
| mksnapshotFiles.forEach(file => { | ||
| fs.copyFileSync(path.join(mksnapshotDir, file), path.join(workingDir, file)) | ||
| }) | ||
| } | ||
|
|
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| function getBinaryPath (binary, binaryPath) { | ||
| if (process.platform === 'win32') { | ||
| return path.join(binaryPath, `${binary}.exe`) | ||
| } else { | ||
| return path.join(binaryPath, binary) | ||
| } | ||
| } | ||
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| const args = process.argv.slice(2) | ||
| if (args.length === 0 || args.includes('--help')) { | ||
| console.log(`Usage: mksnapshot file.js (--output_dir OUTPUT_DIR). ` + | ||
| `Additional mksnapshot args except for --startup_blob are supported:`) | ||
| args.push('--help') | ||
| } | ||
| const outDirIdx = args.indexOf('--output_dir') | ||
| let outputDir = process.cwd() | ||
| let mksnapshotArgs = args | ||
| if (outDirIdx > -1) { | ||
| mksnapshotArgs = args.slice(0, outDirIdx) | ||
| if (args.length >= (outDirIdx + 2)) { | ||
| outputDir = args[(outDirIdx + 1)] | ||
| if (args.length > (outDirIdx + 2)) { | ||
| mksnapshotArgs = mksnapshotArgs.concat(args.slice(outDirIdx + 2)) | ||
| } | ||
| } else { | ||
| console.log('Error! Output directory argument given but directory not specified.') | ||
| process.exit(1) | ||
| } | ||
| } | ||
| if (args.includes('--startup_blob')) { | ||
| console.log('--startup_blob argument not supported. Use --output_dir to specify where to output snapshot_blob.bin') | ||
| process.exit(1) | ||
| } else { | ||
| mksnapshotArgs = mksnapshotArgs.concat(['--startup_blob', 'snapshot_blob.bin']) | ||
| } | ||
| if (!mksnapshotArgs.includes('--turbo_instruction_scheduling')) { | ||
| mksnapshotArgs.push('--turbo_instruction_scheduling') | ||
| } | ||
|
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| const mksnapshotDir = path.join(__dirname, 'bin') | ||
| copyMksnapshotFiles(mksnapshotDir, workingDir) | ||
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| const options = { | ||
| cwd: workingDir, | ||
| env: process.env, | ||
| stdio: 'inherit' | ||
| } | ||
|
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| var mksnapshotProcess = ChildProcess.spawn(command, args, options) | ||
| mksnapshotProcess.on('exit', function (code, signal) { | ||
| if (code == null && signal === 'SIGILL') { | ||
| const mksnapshotCommand = getBinaryPath('mksnapshot', workingDir) | ||
| const mksnapshotProcess = spawnSync(mksnapshotCommand, mksnapshotArgs, options) | ||
| if (mksnapshotProcess.status !== 0) { | ||
| let code = mksnapshotProcess.status | ||
| if (code == null && mksnapshotProcess.signal === 'SIGILL') { | ||
| code = 1 | ||
| } | ||
| console.log('Error running mksnapshot.') | ||
| process.exit(code) | ||
| }) | ||
|
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| var killMksnapshot = function () { | ||
| try { | ||
| mksnapshotProcess.kill() | ||
| } catch (ignored) { | ||
| } | ||
| } | ||
| if (args.includes('--help')) { | ||
| process.exit(0) | ||
| } | ||
|
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| fs.copyFileSync(path.join(workingDir, 'snapshot_blob.bin'), | ||
| path.join(outputDir, 'snapshot_blob.bin')) | ||
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| process.on('exit', killMksnapshot) | ||
| process.on('SIGTERM', killMksnapshot) | ||
| const v8ContextGenCommand = getBinaryPath('v8_context_snapshot_generator', workingDir) | ||
| const v8ContextGenArgs = [ | ||
| `--output_file=${path.join(outputDir, 'v8_context_snapshot.bin')}` | ||
| ] | ||
|
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| const v8ContextGenOptions = { | ||
| cwd: mksnapshotDir, | ||
| env: process.env, | ||
| stdio: 'inherit' | ||
| } | ||
| const v8ContextGenProcess = spawnSync(v8ContextGenCommand, v8ContextGenArgs, v8ContextGenOptions) | ||
| if (v8ContextGenProcess.status !== 0) { | ||
| console.log('Error running the v8 context snapshot generator.', v8ContextGenProcess) | ||
| process.exit(v8ContextGenProcess.status) | ||
| } | ||
| process.exit(0) |
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