bb0ea1c483
Bug: chromium:1044942 Change-Id: If7caf955f5aab954a57c46aab7830830b1a64d04 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2162872 Reviewed-by: Maya Lekova <mslekova@chromium.org> Commit-Queue: Michael Achenbach <machenbach@chromium.org> Cr-Commit-Position: refs/heads/master@{#67374}
92 lines
2.9 KiB
JavaScript
92 lines
2.9 KiB
JavaScript
// Copyright 2020 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Flags: --allow-natives-syntax
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// Files: tools/clusterfuzz/v8_mock.js
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// Test foozzie mocks for differential fuzzing.
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// Deterministic Math.random.
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assertEquals(0.7098480789645691, Math.random());
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assertEquals(0.9742682568175951, Math.random());
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assertEquals(0.20008059867222983, Math.random());
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// Deterministic date.
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assertEquals(1477662728698, Date.now());
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assertEquals(1477662728701, Date.now());
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assertEquals(1477662728705, new Date().getTime());
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assertEquals(710, new Date.prototype.constructor().getUTCMilliseconds());
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// Deterministic arguments in constructor keep working.
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assertEquals(819134640000,
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new Date('December 17, 1995 03:24:00 GMT+1000').getTime());
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// Dummy performance methods.
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assertEquals(1.2, performance.now());
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assertEquals([], performance.measureMemory());
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// Worker messages follow a predefined deterministic pattern.
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const worker = new Worker(``, {type: 'string'});
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assertEquals(0, worker.getMessage());
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assertEquals(-1, worker.getMessage());
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// NaN patterns in typed arrays are mocked out. Test that we get no
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// difference between unoptimized and optimized code.
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function testSameOptimized(pattern, create_fun) {
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const expected = new Uint32Array(pattern);
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%PrepareFunctionForOptimization(create_fun);
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assertEquals(expected, create_fun());
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%OptimizeFunctionOnNextCall(create_fun);
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assertEquals(expected, create_fun());
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}
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function testArrayType(arrayType, pattern) {
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// Test passing NaNs to constructor with array.
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let create = function() {
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return new Uint32Array(new arrayType([-NaN]).buffer);
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};
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testSameOptimized(pattern, create);
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// Test passing NaNs to constructor with iterator.
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create = function() {
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const iter = function*(){ yield* [-NaN]; }();
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return new Uint32Array(new arrayType(iter).buffer);
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};
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testSameOptimized(pattern, create);
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// Test setting NaN property.
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create = function() {
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const arr = new arrayType(1);
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arr[0] = -NaN;
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return new Uint32Array(arr.buffer);
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};
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// Test passing NaN using set.
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testSameOptimized(pattern, create);
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create = function() {
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const arr = new arrayType(1);
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arr.set([-NaN], 0);
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return new Uint32Array(arr.buffer);
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};
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testSameOptimized(pattern, create);
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}
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var isBigEndian = new Uint8Array(new Uint16Array([0xABCD]).buffer)[0] === 0xAB;
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testArrayType(Float32Array, [1065353216]);
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if (isBigEndian){
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testArrayType(Float64Array, [1072693248, 0]);
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}
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else {
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testArrayType(Float64Array, [0, 1072693248]);
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}
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// Realm.eval is just eval.
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assertEquals(1477662728716, Realm.eval(Realm.create(), `Date.now()`));
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// Test suppressions when Math.pow is optimized.
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function callPow(v) {
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return Math.pow(v, -0.5);
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}
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%PrepareFunctionForOptimization(callPow);
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const unoptimized = callPow(6996);
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%OptimizeFunctionOnNextCall(callPow);
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assertEquals(unoptimized, callPow(6996));
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