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5c27e44488
Removes the requirement to use `--trace-events-enabled` to enable
trace events. Tracing is enabled automatically if there are any
enabled categories.
Adds a new `trace_events` module with an API for enabling/disabling
trace events at runtime without a command line flag.
```js
const trace_events = require('trace_events');
const categories = [ 'node.perf', 'node.async_hooks' ];
const tracing = trace_events.createTracing({ categories });
tracing.enable();
// do stuff
tracing.disable();
```
Multiple `Tracing` objects may exist and be enabled at any point
in time. The enabled trace event categories is the union of all
enabled `Tracing` objects and the `--trace-event-categories`
flag.
PR-URL: https://github.com/nodejs/node/pull/19803
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Ali Ijaz Sheikh <ofrobots@google.com>
Reviewed-By: Franziska Hinkelmann <franziska.hinkelmann@gmail.com>
12 lines
339 B
JavaScript
12 lines
339 B
JavaScript
'use strict';
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// Flags: --expose-internals
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require('../common');
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const assert = require('assert');
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const { builtinLibs } = require('internal/modules/cjs/helpers');
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const hasInspector = process.config.variables.v8_enable_inspector === 1;
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const expectedLibs = hasInspector ? 33 : 32;
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assert.strictEqual(builtinLibs.length, expectedLibs);
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