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1d35a066e7
Adds a debug-only macro that can be used to track when a V8 fast API is called. A map of counters is maintained in in thread-local storage and an internal API can be called to get the total count associated with a call id. Specific tests are added and `crypto.timingSafeEqual` as well as internal documentation are updated to show how to use the macro and test fast API calls without running long loops. PR-URL: https://github.com/nodejs/node/pull/54317 Reviewed-By: Robert Nagy <ronagy@icloud.com> Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Yagiz Nizipli <yagiz@nizipli.com> Reviewed-By: Tobias Nießen <tniessen@tnie.de>
60 lines
1.6 KiB
JavaScript
60 lines
1.6 KiB
JavaScript
// Flags: --expose-internals --no-warnings --allow-natives-syntax
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'use strict';
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const common = require('../common');
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const assert = require('assert');
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const { internalBinding } = require('internal/test/binding');
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if (!common.isDebug) {
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assert.throws(() => internalBinding('debug'), {
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message: 'No such binding: debug'
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});
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return;
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}
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const {
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getV8FastApiCallCount,
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isEven,
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isOdd,
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} = internalBinding('debug');
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assert.throws(() => getV8FastApiCallCount(), {
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message: 'getV8FastApiCallCount must be called with a string',
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});
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function testIsEven() {
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for (let i = 0; i < 10; i++) {
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assert.strictEqual(isEven(i), i % 2 === 0);
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}
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}
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function testIsOdd() {
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for (let i = 0; i < 20; i++) {
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assert.strictEqual(isOdd(i), i % 2 !== 0);
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}
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}
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// Should return 0 by default for any string.
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assert.strictEqual(getV8FastApiCallCount(''), 0);
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assert.strictEqual(getV8FastApiCallCount('foo'), 0);
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assert.strictEqual(getV8FastApiCallCount('debug.isEven'), 0);
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assert.strictEqual(getV8FastApiCallCount('debug.isOdd'), 0);
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eval('%PrepareFunctionForOptimization(testIsEven)');
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testIsEven();
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eval('%PrepareFunctionForOptimization(testIsOdd)');
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testIsOdd();
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// Functions should not be optimized yet.
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assert.strictEqual(getV8FastApiCallCount('debug.isEven'), 0);
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assert.strictEqual(getV8FastApiCallCount('debug.isOdd'), 0);
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eval('%OptimizeFunctionOnNextCall(testIsEven)');
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testIsEven();
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eval('%OptimizeFunctionOnNextCall(testIsOdd)');
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testIsOdd();
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// Functions should have been optimized and fast path taken.
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assert.strictEqual(getV8FastApiCallCount('debug.isEven'), 10);
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assert.strictEqual(getV8FastApiCallCount('debug.isOdd'), 20);
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