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31 changes: 15 additions & 16 deletions doc/contributing/adding-v8-fast-api.md
Original file line number Diff line number Diff line change
Expand Up @@ -173,25 +173,24 @@ A typical function that communicates between JavaScript and C++ is as follows.
// We could also require a function that uses the internal binding internally.
const { divide } = internalBinding('custom_namespace');

if (common.isDebug) {
const { getV8FastApiCallCount } = internalBinding('debug');

// The function that will be optimized. It has to be a function written in
// JavaScript. Since `divide` comes from the C++ side, we need to wrap it.
function testFastPath(a, b) {
return divide(a, b);
}
// The function that will be optimized. It has to be a function written in
// JavaScript. Since `divide` comes from the C++ side, we need to wrap it.
function testFastPath(a, b) {
return divide(a, b);
}

eval('%PrepareFunctionForOptimization(testFastPath)');
// This call will let V8 know about the argument types that the function expects.
assert.strictEqual(testFastPath(6, 3), 2);
eval('%PrepareFunctionForOptimization(testFastPath)');
// This call will let V8 know about the argument types that the function expects.
assert.strictEqual(testFastPath(6, 3), 2);

eval('%OptimizeFunctionOnNextCall(testFastPath)');
assert.strictEqual(testFastPath(8, 2), 4);
assert.throws(() => testFastPath(1, 0), {
code: 'ERR_INVALID_STATE',
});
eval('%OptimizeFunctionOnNextCall(testFastPath)');
assert.strictEqual(testFastPath(8, 2), 4);
assert.throws(() => testFastPath(1, 0), {
code: 'ERR_INVALID_STATE',
});

if (common.isDebug) {
const { getV8FastApiCallCount } = internalBinding('debug');
assert.strictEqual(getV8FastApiCallCount('custom_namespace.divide.ok'), 1);
assert.strictEqual(getV8FastApiCallCount('custom_namespace.divide.error'), 1);
}
Expand Down
12 changes: 7 additions & 5 deletions test/parallel/test-whatwg-url-canparse.js
Original file line number Diff line number Diff line change
Expand Up @@ -19,9 +19,8 @@ assert.throws(() => {
// It should not throw when called without a base string
assert.strictEqual(URL.canParse('https://example.org'), true);

if (common.isDebug) {
const { getV8FastApiCallCount } = internalBinding('debug');

{
// V8 Fast API
function testFastPaths() {
// `canParse` binding has two overloads.
assert.strictEqual(URL.canParse('https://www.example.com/path/?query=param#hash'), true);
Expand All @@ -33,6 +32,9 @@ if (common.isDebug) {
eval('%OptimizeFunctionOnNextCall(URL.canParse)');
testFastPaths();

assert.strictEqual(getV8FastApiCallCount('url.canParse'), 1);
assert.strictEqual(getV8FastApiCallCount('url.canParse.withBase'), 1);
if (common.isDebug) {
const { getV8FastApiCallCount } = internalBinding('debug');
assert.strictEqual(getV8FastApiCallCount('url.canParse'), 1);
assert.strictEqual(getV8FastApiCallCount('url.canParse.withBase'), 1);
}
}
15 changes: 9 additions & 6 deletions test/sequential/test-crypto-timing-safe-equal.js
Original file line number Diff line number Diff line change
Expand Up @@ -93,10 +93,8 @@ assert.throws(
}
);

if (common.isDebug) {
const { internalBinding } = require('internal/test/binding');
const { getV8FastApiCallCount } = internalBinding('debug');

{
// V8 Fast API
const foo = Buffer.from('foo');
const bar = Buffer.from('bar');
const longer = Buffer.from('longer');
Expand All @@ -111,6 +109,11 @@ if (common.isDebug) {
assert.throws(() => testFastPath(foo, longer), {
code: 'ERR_CRYPTO_TIMING_SAFE_EQUAL_LENGTH',
});
assert.strictEqual(getV8FastApiCallCount('crypto.timingSafeEqual.ok'), 2);
assert.strictEqual(getV8FastApiCallCount('crypto.timingSafeEqual.error'), 1);

if (common.isDebug) {
const { internalBinding } = require('internal/test/binding');
const { getV8FastApiCallCount } = internalBinding('debug');
assert.strictEqual(getV8FastApiCallCount('crypto.timingSafeEqual.ok'), 2);
assert.strictEqual(getV8FastApiCallCount('crypto.timingSafeEqual.error'), 1);
}
}