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