Mon, 07 Dec 2015 13:15:47 -0800
Merge
1 /*
2 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
24 /**
25 * JDK-8044750: megamorphic getter for scope objects does not call __noSuchProperty__ hook
26 *
27 * @test
28 * @fork
29 * @option -Dnashorn.unstable.relink.threshold=16
30 * @run
31 */
33 __noSuchProperty__ = function(name) {
34 return 1;
35 }
37 function func(obj) {
38 with(obj) {
39 // this "foo" getter site becomes megamorphic
40 // due to different 'with' scope objects.
41 foo;
42 }
43 }
45 var LIMIT = 20; // should be more than megamorphic threshold set via @option
47 for (var i = 0; i < LIMIT; i++) {
48 var obj = {};
49 obj.foo = i;
50 obj[i] = i;
51 func(obj);
52 }
54 // pass a 'with' scope object that does not have 'foo'.
55 // callsite inside func should see __noSuchProperty__
56 // hook on global scope object.
57 func({});
59 function checkFoo() {
60 with({}) {
61 try {
62 foo;
63 return true;
64 } catch (e) {
65 return false;
66 }
67 }
68 }
70 var oldNoSuchProperty = this.__noSuchProperty__;
71 delete this.__noSuchProperty__;
73 // keep deleting/restorting __noSuchProperty__ alternatively
74 // to make "foo" access in checkFoo function megamorphic!
76 for (var i = 0; i < LIMIT; i++) {
77 // no __noSuchProperty__ and 'with' scope object has no 'foo'
78 delete __noSuchProperty__;
79 Assert.assertFalse(checkFoo(), "Expected false in iteration " + i);
81 // __noSuchProperty__ is exists but 'with' scope object has no 'foo'
82 this.__noSuchProperty__ = oldNoSuchProperty;
83 Assert.assertTrue(checkFoo(), "Expected true in iteration " + i);
84 }