84 lines
2.5 KiB
JavaScript
84 lines
2.5 KiB
JavaScript
/*
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* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/**
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* JDK-8044750: megamorphic getter for scope objects does not call __noSuchProperty__ hook
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*
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* @test
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* @option --unstable-relink-threshold=16
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* @run
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*/
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__noSuchProperty__ = function(name) {
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return 1;
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}
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function func(obj) {
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with(obj) {
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// this "foo" getter site becomes megamorphic
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// due to different 'with' scope objects.
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foo;
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}
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}
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var LIMIT = 20; // should be more than megamorphic threshold set via @option
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for (var i = 0; i < LIMIT; i++) {
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var obj = {};
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obj.foo = i;
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obj[i] = i;
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func(obj);
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}
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// pass a 'with' scope object that does not have 'foo'.
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// callsite inside func should see __noSuchProperty__
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// hook on global scope object.
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func({});
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function checkFoo() {
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with({}) {
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try {
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foo;
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return true;
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} catch (e) {
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return false;
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}
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}
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}
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var oldNoSuchProperty = this.__noSuchProperty__;
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delete this.__noSuchProperty__;
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// keep deleting/restorting __noSuchProperty__ alternatively
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// to make "foo" access in checkFoo function megamorphic!
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for (var i = 0; i < LIMIT; i++) {
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// no __noSuchProperty__ and 'with' scope object has no 'foo'
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delete __noSuchProperty__;
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Assert.assertFalse(checkFoo(), "Expected false in iteration " + i);
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// __noSuchProperty__ is exists but 'with' scope object has no 'foo'
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this.__noSuchProperty__ = oldNoSuchProperty;
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Assert.assertTrue(checkFoo(), "Expected true in iteration " + i);
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}
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