/* * 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); }