3b3929fdc7
This relands commit ea74f0f85a.
The revert was due to failures in cctest/test-heap/ReleaseOverReservedPages,
caused by apparent changes to memory layout and fragmentation of the
first page. Eliminating a situation in messages.js where this CL has had
an effect on map transitions seems to solve the issue.
R=verwaest@chromium.org
Review URL: https://codereview.chromium.org/714883003
Cr-Commit-Position: refs/heads/master@{#25266}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25266 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
342 lines
10 KiB
JavaScript
342 lines
10 KiB
JavaScript
// Copyright 2010 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// Tests the Object.freeze and Object.isFrozen methods - ES 15.2.3.9 and
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// ES 15.2.3.12
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// Flags: --allow-natives-syntax
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// Test that we throw an error if an object is not passed as argument.
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var non_objects = new Array(undefined, null, 1, -1, 0, 42.43);
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for (var key in non_objects) {
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var exception = false;
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try {
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Object.freeze(non_objects[key]);
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} catch(e) {
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exception = true;
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assertTrue(/Object.freeze called on non-object/.test(e));
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}
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assertTrue(exception);
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}
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for (var key in non_objects) {
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exception = false;
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try {
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Object.isFrozen(non_objects[key]);
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} catch(e) {
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exception = true;
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assertTrue(/Object.isFrozen called on non-object/.test(e));
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}
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assertTrue(exception);
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}
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// Test normal data properties.
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var obj = { x: 42, z: 'foobar' };
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var desc = Object.getOwnPropertyDescriptor(obj, 'x');
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assertTrue(desc.writable);
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assertTrue(desc.configurable);
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assertEquals(42, desc.value);
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desc = Object.getOwnPropertyDescriptor(obj, 'z');
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assertTrue(desc.writable);
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assertTrue(desc.configurable);
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assertEquals('foobar', desc.value);
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assertTrue(Object.isExtensible(obj));
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assertFalse(Object.isFrozen(obj));
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Object.freeze(obj);
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// Make sure we are no longer extensible.
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assertFalse(Object.isExtensible(obj));
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assertTrue(Object.isFrozen(obj));
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obj.foo = 42;
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assertEquals(obj.foo, undefined);
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desc = Object.getOwnPropertyDescriptor(obj, 'x');
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assertFalse(desc.writable);
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assertFalse(desc.configurable);
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assertEquals(42, desc.value);
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desc = Object.getOwnPropertyDescriptor(obj, 'z');
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assertFalse(desc.writable);
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assertFalse(desc.configurable);
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assertEquals("foobar", desc.value);
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// Make sure that even if we try overwrite a value that is not writable, it is
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// not changed.
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obj.x = "tete";
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assertEquals(42, obj.x);
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obj.x = { get: function() {return 43}, set: function() {} };
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assertEquals(42, obj.x);
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// Test on accessors.
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var obj2 = {};
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function get() { return 43; };
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function set() {};
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Object.defineProperty(obj2, 'x', { get: get, set: set, configurable: true });
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desc = Object.getOwnPropertyDescriptor(obj2, 'x');
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assertTrue(desc.configurable);
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assertEquals(undefined, desc.value);
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assertEquals(set, desc.set);
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assertEquals(get, desc.get);
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assertTrue(Object.isExtensible(obj2));
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assertFalse(Object.isFrozen(obj2));
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Object.freeze(obj2);
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assertTrue(Object.isFrozen(obj2));
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assertFalse(Object.isExtensible(obj2));
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desc = Object.getOwnPropertyDescriptor(obj2, 'x');
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assertFalse(desc.configurable);
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assertEquals(undefined, desc.value);
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assertEquals(set, desc.set);
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assertEquals(get, desc.get);
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obj2.foo = 42;
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assertEquals(obj2.foo, undefined);
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// Test freeze on arrays.
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var arr = new Array(42,43);
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desc = Object.getOwnPropertyDescriptor(arr, '0');
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assertTrue(desc.configurable);
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assertTrue(desc.writable);
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assertEquals(42, desc.value);
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desc = Object.getOwnPropertyDescriptor(arr, '1');
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assertTrue(desc.configurable);
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assertTrue(desc.writable);
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assertEquals(43, desc.value);
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assertTrue(Object.isExtensible(arr));
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assertFalse(Object.isFrozen(arr));
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Object.freeze(arr);
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assertTrue(Object.isFrozen(arr));
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assertFalse(Object.isExtensible(arr));
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desc = Object.getOwnPropertyDescriptor(arr, '0');
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assertFalse(desc.configurable);
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assertFalse(desc.writable);
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assertEquals(42, desc.value);
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desc = Object.getOwnPropertyDescriptor(arr, '1');
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assertFalse(desc.configurable);
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assertFalse(desc.writable);
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assertEquals(43, desc.value);
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arr[0] = 'foo';
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assertEquals(arr[0], 42);
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// Test that isFrozen return the correct value even if configurable has been set
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// to false on all properties manually and the extensible flag has also been set
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// to false manually.
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var obj3 = { x: 42, y: 'foo' };
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assertFalse(Object.isFrozen(obj3));
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Object.defineProperty(obj3, 'x', {configurable: false, writable: false});
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Object.defineProperty(obj3, 'y', {configurable: false, writable: false});
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Object.preventExtensions(obj3);
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assertTrue(Object.isFrozen(obj3));
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// Make sure that an object that has only non-configurable, but one
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// writable property, is not classified as frozen.
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var obj4 = {};
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Object.defineProperty(obj4, 'x', {configurable: false, writable: true});
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Object.defineProperty(obj4, 'y', {configurable: false, writable: false});
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Object.preventExtensions(obj4);
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assertFalse(Object.isFrozen(obj4));
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// Make sure that an object that has only non-writable, but one
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// configurable property, is not classified as frozen.
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var obj5 = {};
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Object.defineProperty(obj5, 'x', {configurable: true, writable: false});
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Object.defineProperty(obj5, 'y', {configurable: false, writable: false});
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Object.preventExtensions(obj5);
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assertFalse(Object.isFrozen(obj5));
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// Make sure that Object.freeze returns the frozen object.
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var obj6 = {}
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assertTrue(obj6 === Object.freeze(obj6))
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// Test that the enumerable attribute is unperturbed by freezing.
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obj = { x: 42, y: 'foo' };
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Object.defineProperty(obj, 'y', {enumerable: false});
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Object.freeze(obj);
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assertTrue(Object.isFrozen(obj));
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desc = Object.getOwnPropertyDescriptor(obj, 'x');
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assertTrue(desc.enumerable);
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desc = Object.getOwnPropertyDescriptor(obj, 'y');
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assertFalse(desc.enumerable);
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// Fast properties should remain fast
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obj = { x: 42, y: 'foo' };
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assertTrue(%HasFastProperties(obj));
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Object.freeze(obj);
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assertTrue(Object.isFrozen(obj));
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assertTrue(%HasFastProperties(obj));
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// Frozen objects should share maps where possible
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obj = { prop1: 1, prop2: 2 };
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obj2 = { prop1: 3, prop2: 4 };
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assertTrue(%HaveSameMap(obj, obj2));
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Object.freeze(obj);
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Object.freeze(obj2);
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assertTrue(Object.isFrozen(obj));
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assertTrue(Object.isFrozen(obj2));
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assertTrue(%HaveSameMap(obj, obj2));
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// Frozen objects should share maps even when they have elements
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obj = { prop1: 1, prop2: 2, 75: 'foo' };
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obj2 = { prop1: 3, prop2: 4, 150: 'bar' };
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assertTrue(%HaveSameMap(obj, obj2));
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Object.freeze(obj);
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Object.freeze(obj2);
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assertTrue(Object.isFrozen(obj));
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assertTrue(Object.isFrozen(obj2));
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assertTrue(%HaveSameMap(obj, obj2));
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// Setting elements after freezing should not be allowed
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obj = { prop: 'thing' };
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Object.freeze(obj);
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assertTrue(Object.isFrozen(obj));
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obj[0] = 'hello';
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assertFalse(obj.hasOwnProperty(0));
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// Freezing an object in dictionary mode should work
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// Also testing that getter/setter properties work after freezing
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obj = { };
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for (var i = 0; i < 100; ++i) {
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obj['x' + i] = i;
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}
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var accessorDidRun = false;
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Object.defineProperty(obj, 'accessor', {
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get: function() { return 42 },
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set: function() { accessorDidRun = true },
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configurable: true,
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enumerable: true
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});
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assertFalse(%HasFastProperties(obj));
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Object.freeze(obj);
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assertFalse(%HasFastProperties(obj));
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assertTrue(Object.isFrozen(obj));
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assertFalse(Object.isExtensible(obj));
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for (var i = 0; i < 100; ++i) {
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desc = Object.getOwnPropertyDescriptor(obj, 'x' + i);
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assertFalse(desc.writable);
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assertFalse(desc.configurable);
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}
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assertEquals(42, obj.accessor);
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assertFalse(accessorDidRun);
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obj.accessor = 'ignored value';
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assertTrue(accessorDidRun);
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// Freezing arguments should work
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var func = function(arg) {
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Object.freeze(arguments);
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assertTrue(Object.isFrozen(arguments));
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};
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func('hello', 'world');
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func('goodbye', 'world');
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// Freezing sparse arrays
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var sparseArr = [0, 1];
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sparseArr[10000] = 10000;
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Object.freeze(sparseArr);
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assertTrue(Object.isFrozen(sparseArr));
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// Accessors on fast object should behavior properly after freezing
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obj = {};
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Object.defineProperty(obj, 'accessor', {
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get: function() { return 42 },
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set: function() { accessorDidRun = true },
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configurable: true,
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enumerable: true
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});
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assertTrue(%HasFastProperties(obj));
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Object.freeze(obj);
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assertTrue(Object.isFrozen(obj));
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assertTrue(%HasFastProperties(obj));
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assertEquals(42, obj.accessor);
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accessorDidRun = false;
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obj.accessor = 'ignored value';
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assertTrue(accessorDidRun);
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// Test for regression in mixed accessor/data property objects.
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// The strict function is one such object.
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assertTrue(Object.isFrozen(Object.freeze(function(){"use strict";})));
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// Also test a simpler case
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obj = {};
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Object.defineProperty(obj, 'accessor2', {
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get: function() { return 42 },
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set: function() { accessorDidRun = true },
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configurable: true,
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enumerable: true
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});
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obj.data = 'foo';
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assertTrue(%HasFastProperties(obj));
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Object.freeze(obj);
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assertTrue(%HasFastProperties(obj));
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assertTrue(Object.isFrozen(obj));
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// Test array built-in functions with freeze.
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obj = [1,2,3];
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Object.freeze(obj);
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// if frozen implies sealed, then the tests in object-seal.js are mostly
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// sufficient.
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assertTrue(Object.isSealed(obj));
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// Verify that the length can't be written by builtins.
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assertThrows(function() { obj.push(); }, TypeError);
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assertThrows(function() { obj.unshift(); }, TypeError);
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assertThrows(function() { obj.splice(0,0); }, TypeError);
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assertTrue(Object.isFrozen(obj));
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// Verify that an item can't be changed with splice.
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assertThrows(function() { obj.splice(0,1,1); }, TypeError);
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assertTrue(Object.isFrozen(obj));
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// Verify that unshift() with no arguments will fail if it reifies from
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// the prototype into the object.
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obj = [1,,3];
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obj.__proto__[1] = 1;
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assertEquals(1, obj[1]);
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Object.freeze(obj);
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assertThrows(function() { obj.unshift(); }, TypeError);
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