dc04bf6761Removes the reliance on prototype bound methods internally so that Uint8Arrays can be set as the bound `this` value when calling the various Buffer methods. Introduces some additional tamper protection by removing internal reliance on writable properties. Fixes: https://github.com/nodejs/node/issues/56577 PR-URL: https://github.com/nodejs/node/pull/56578 Reviewed-By: Anna Henningsen <anna@addaleax.net>
49 lines
1.4 KiB
JavaScript
49 lines
1.4 KiB
JavaScript
// Flags: --expose-internals --no-warnings --allow-natives-syntax
|
|
'use strict';
|
|
|
|
const common = require('../common');
|
|
const assert = require('assert');
|
|
|
|
const { internalBinding } = require('internal/test/binding');
|
|
|
|
// eslint-disable-next-line no-unused-vars
|
|
const { utf8Write } = require('internal/buffer');
|
|
|
|
|
|
function testFastUtf8Write() {
|
|
{
|
|
const buf = Buffer.from('\x80');
|
|
|
|
assert.strictEqual(buf[0], 194);
|
|
assert.strictEqual(buf[1], 128);
|
|
}
|
|
|
|
{
|
|
const buf = Buffer.alloc(64);
|
|
const newBuf = buf.subarray(0, buf.write('éñüçßÆ'));
|
|
assert.deepStrictEqual(newBuf, Buffer.from([195, 169, 195, 177, 195, 188, 195, 167, 195, 159, 195, 134]));
|
|
}
|
|
|
|
{
|
|
const buf = Buffer.alloc(64);
|
|
const newBuf = buf.subarray(0, buf.write('¿'));
|
|
assert.deepStrictEqual(newBuf, Buffer.from([194, 191]));
|
|
}
|
|
|
|
{
|
|
const buf = Buffer.from(new ArrayBuffer(34), 0, 16);
|
|
const str = Buffer.from([50, 83, 127, 39, 104, 8, 74, 65, 108, 123, 5, 4, 82, 10, 7, 53]).toString();
|
|
const newBuf = buf.subarray(0, buf.write(str));
|
|
assert.deepStrictEqual(newBuf, Buffer.from([ 50, 83, 127, 39, 104, 8, 74, 65, 108, 123, 5, 4, 82, 10, 7, 53]));
|
|
}
|
|
}
|
|
|
|
eval('%PrepareFunctionForOptimization(utf8Write)');
|
|
testFastUtf8Write();
|
|
eval('%OptimizeFunctionOnNextCall(utf8Write)');
|
|
testFastUtf8Write();
|
|
|
|
if (common.isDebug) {
|
|
const { getV8FastApiCallCount } = internalBinding('debug');
|
|
assert.strictEqual(getV8FastApiCallCount('buffer.writeString'), 4);
|
|
}
|