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Automatically save and convert JavaScript profile to chrome format 

Summary: @​public

Migrate scripts to open source and add new route on the packager
to directly convert profiler outputs to a devtools compatible format.

Reviewed By: @jspahrsummers

Differential Revision: D2425740
This commit is contained in:
Tadeu Zagallo 2015-09-11 06:35:25 -07:00 committed by facebook-github-bot-7
parent 2c321df75c
commit 270b1c718f
1 changed files with 34 additions and 12 deletions
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46
packager.js
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@ -224,7 +224,7 @@ function statusPageMiddleware(req, res, next) {
}
function systraceProfileMiddleware(req, res, next) {
if (req.url !== '/profile') {
if (req.url !== '/systrace') {
next();
return;
}
@ -237,33 +237,54 @@ function systraceProfileMiddleware(req, res, next) {
childProcess.exec(cmd, function(error) {
if (error) {
if (error.code === 127) {
console.error(
res.end(
'\n** Failed executing `' + cmd + '` **\n\n' +
'Google trace-viewer is required to visualize the data, do you have it installled?\n\n' +
'You can get it at:\n\n' +
' https://github.com/google/trace-viewer\n\n' +
'If it\'s not in your path, you can set a custom path with:\n\n' +
' TRACE_VIEWER_PATH=/path/to/trace-viewer\n\n' +
'NOTE: Your profile data was kept at:\n\n' +
' ' + dumpName
'Google trace-viewer is required to visualize the data, You can install it with `brew install trace2html`\n\n' +
'NOTE: Your profile data was kept at:\n' + dumpName
);
} else {
console.error('Unknown error', error);
console.error(error);
res.end('Unknown error %s', error.message);
}
res.end();
return;
} else {
childProcess.exec('rm ' + dumpName);
childProcess.exec('open ' + dumpName.replace(/json$/, 'html'), function(err) {
if (err) {
console.error(err);
}
res.end(err.message);
} else {
res.end();
}
});
}
});
}
function cpuProfileMiddleware(req, res, next) {
if (req.url !== '/cpu-profile') {
next();
return;
}
console.log('Dumping CPU profile information...');
const dumpName = '/tmp/cpu-profile_' + Date.now();
fs.writeFileSync(dumpName + '.json', req.rawBody);
const cmd = path.join(__dirname, '..', 'JSCLegacyProfiler', 'json2trace') + ' -cpuprofiler ' + dumpName + '.cpuprofile ' + dumpName + '.json';
childProcess.exec(cmd, function(error) {
if (error) {
console.error(error);
res.end('Unknown error: %s', error.message);
} else {
res.end(
'Your profile was generated at\n\n' + dumpName + '.cpuprofile\n\n' +
'Open `Chrome Dev Tools > Profiles > Load` and select the profile to visualize it.'
);
}
});
}
function getAppMiddleware(options) {
var transformerPath = options.transformer;
if (!isAbsolutePath(transformerPath)) {
@ -297,6 +318,7 @@ function runServer(
.use(getDevToolsLauncher(options))
.use(statusPageMiddleware)
.use(systraceProfileMiddleware)
.use(cpuProfileMiddleware)
// Temporarily disable flow check until it's more stable
//.use(getFlowTypeCheckMiddleware(options))
.use(getAppMiddleware(options));