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'use strict';
const common = require('../common');
const assert = require('assert');
const cp = require('child_process');
const fs = require('fs');
const path = require('path');
const CODE =
'setTimeout(() => { for (var i = 0; i < 100000; i++) { "test" + i } }, 1)';
const tmpdir = require('../common/tmpdir');
tmpdir.refresh();
const FILE_NAME = path.join(tmpdir.path, 'node_trace.1.log');
const proc = cp.spawn(process.execPath,
[ '--trace-events-enabled',
'--trace-event-categories', 'v8',
'-e', CODE ],
{ cwd: tmpdir.path });
proc.once('exit', common.mustCall(() => {
assert(fs.existsSync(FILE_NAME));
fs.readFile(FILE_NAME, common.mustCall((err, data) => {
const traces = JSON.parse(data.toString()).traceEvents;
assert(traces.length > 0);
// V8 trace events should be generated.
assert(traces.some((trace) => {
if (trace.pid !== proc.pid)
return false;
if (trace.cat !== 'v8')
return false;
if (trace.name !== 'V8.ScriptCompiler')
return false;
return true;
}));
// C++ async_hooks trace events should be generated.
assert(!traces.some((trace) => {
if (trace.pid !== proc.pid)
return false;
if (trace.cat !== 'node.async_hooks')
return false;
return true;
}));
// JavaScript async_hooks trace events should be generated.
assert(!traces.some((trace) => {
if (trace.pid !== proc.pid)
return false;
if (trace.cat !== 'node.async_hooks')
return false;
if (trace.name !== 'Timeout')
return false;
return true;
}));
}));
}));