| 'use strict'; |
| |
| // This tests that tracing can be enabled dynamically with the |
| // trace_events module. |
| |
| const common = require('../common'); |
| try { |
| require('trace_events'); |
| } catch { |
| common.skip('missing trace events'); |
| } |
| |
| const assert = require('assert'); |
| const cp = require('child_process'); |
| const fs = require('fs'); |
| const path = require('path'); |
| |
| const enable = `require("trace_events").createTracing( |
| { categories: ["node.async_hooks"] }).enable();`; |
| const code = |
| 'setTimeout(() => { for (var i = 0; i < 100000; i++) { "test" + i } }, 1)'; |
| |
| const tmpdir = require('../common/tmpdir'); |
| const filename = path.join(tmpdir.path, 'node_trace.1.log'); |
| |
| tmpdir.refresh(); |
| const proc = cp.spawnSync( |
| process.execPath, |
| ['-e', enable + code ], |
| { |
| cwd: tmpdir.path, |
| env: Object.assign({}, process.env, { |
| 'NODE_DEBUG_NATIVE': 'tracing', |
| 'NODE_DEBUG': 'tracing' |
| }) |
| }); |
| |
| console.log('process exit with signal:', proc.signal); |
| console.log('process stderr:', proc.stderr.toString()); |
| |
| assert.strictEqual(proc.status, 0); |
| assert(fs.existsSync(filename)); |
| const data = fs.readFileSync(filename, 'utf-8'); |
| const traces = JSON.parse(data).traceEvents; |
| |
| function filterTimeoutTraces(trace) { |
| if (trace.pid !== proc.pid) |
| return false; |
| if (trace.cat !== 'node,node.async_hooks') |
| return false; |
| if (trace.name !== 'Timeout') |
| return false; |
| return true; |
| } |
| |
| { |
| const timeoutTraces = traces.filter(filterTimeoutTraces); |
| assert.notDeepStrictEqual(timeoutTraces, []); |
| const threads = new Set(); |
| for (const trace of timeoutTraces) { |
| threads.add(trace.tid); |
| } |
| assert.notDeepStrictEqual(timeoutTraces, []); |
| } |