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ac75b2eb19
Instead call the C++ code every time we need to check for a trace category, now we get the C++ pointer to the flag that holds the info if the trace is enabled and return this pointer inside a buffer that we can use to call/check if the value is enabled. With this change, no C++ call is made and the access to the info happens in JS side, which has no perf penalty. PR-URL: https://github.com/nodejs/node/pull/53602 Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Matteo Collina <matteo.collina@gmail.com> Reviewed-By: Yagiz Nizipli <yagiz@nizipli.com>
44 lines
1.4 KiB
JavaScript
44 lines
1.4 KiB
JavaScript
'use strict';
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// Flags: --expose-internals
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const common = require('../common');
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const { it } = require('node:test');
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try {
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require('trace_events');
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} catch {
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common.skip('missing trace events');
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}
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const { createTracing, getEnabledCategories } = require('trace_events');
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const assert = require('assert');
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const binding = require('internal/test/binding');
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const getCategoryEnabledBuffer = binding.internalBinding('trace_events').getCategoryEnabledBuffer;
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it('should track enabled/disabled categories', () => {
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const random = Math.random().toString().slice(2);
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const category = `node.${random}`;
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const buffer = getCategoryEnabledBuffer(category);
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const tracing = createTracing({
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categories: [category],
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});
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assert.ok(buffer[0] === 0, `the buffer[0] should start with value 0, got: ${buffer[0]}`);
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tracing.enable();
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let currentCategories = getEnabledCategories();
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assert.ok(currentCategories.includes(category), `the getEnabledCategories should include ${category}, got: ${currentCategories}`);
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assert.ok(buffer[0] > 0, `the buffer[0] should be greater than 0, got: ${buffer[0]}`);
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tracing.disable();
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currentCategories = getEnabledCategories();
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assert.ok(currentCategories === undefined, `the getEnabledCategories should return undefined, got: ${currentCategories}`);
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assert.ok(buffer[0] === 0, `the buffer[0] should be 0, got: ${buffer[0]}`);
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});
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