jdk8-mips64-public/nashorn: test/script/basic/JDK-8044750.js@e474dc29c216

     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 }

Mercurial > jdk8-mips64-public > nashorn / file revision