49 lines
1.3 KiB
JavaScript
49 lines
1.3 KiB
JavaScript
/**
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* Copyright (c) 2015-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*/
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'use strict';
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const execFile = require('child_process').execFile;
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const fs = require('fs');
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const path = require('path');
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module.exports = function(req, res, next) {
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if (req.url !== '/cpu-profile') {
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next();
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return;
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}
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console.log('Dumping CPU profile information...');
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var dumpName = '/tmp/cpu-profile_' + Date.now();
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fs.writeFileSync(dumpName + '.json', req.rawBody);
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var cmdPath = path.join(
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__dirname,
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'../../../JSCLegacyProfiler/json2trace'
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);
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execFile(
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cmdPath,
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[
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'-cpuprofiler',
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dumpName + '.cpuprofile',
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dumpName + '.json',
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],
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function(error) {
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if (error) {
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console.error(error);
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res.end('Unknown error: ' + error.message);
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} else {
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var response = 'Your profile was generated at\n\n' + dumpName + '.cpuprofile\n\n' +
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'Open `Chrome Dev Tools > Profiles > Load` and select the profile to visualize it.';
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console.log(response);
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res.end(response);
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}
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}
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);
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};
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