1 /*
   2  * Copyright (c) 2010, 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  */
  23 
  24 /**
  25  * JDK-8044851: nashorn properties leak memory
  26  *
  27  * @test
  28  * @option -Dnashorn.debug=true
  29  * @fork
  30  */
  31 
  32 var Property = Java.type("jdk.nashorn.internal.runtime.Property");
  33 var PropertyMap = Java.type("jdk.nashorn.internal.runtime.PropertyMap");
  34 
  35 // Class objects
  36 var objectCls = Java.type("java.lang.Object").class;
  37 var propertyCls = Property.class;
  38 var propertyMapCls = PropertyMap.class;
  39 
  40 // Method objects
  41 var findPropertyMethod = propertyMapCls.getMethod("findProperty", objectCls);
  42 var getKeyMethod = propertyCls.getMethod("getKey");
  43 var isSpillMethod = propertyCls.getMethod("isSpill");
  44 var getSlotMethod = propertyCls.getMethod("getSlot");
  45 
  46 function printProperty(value, property) {
  47     print(value, getKeyMethod.invoke(property), 
  48         isSpillMethod.invoke(property) ? "spill" : "field", getSlotMethod.invoke(property));
  49 }
  50 
  51 function findProperty(obj, name) {
  52     var map = Debug.map(obj);
  53     return findPropertyMethod.invoke(map, name);
  54 }
  55 
  56 var obj = {}, i, name;
  57 
  58 for (i = 0; i < 8; ++i) {
  59     name = 'property' + i;
  60     obj[name] = 'a' + i;
  61     printProperty(obj[name], findProperty(obj, name));
  62 }
  63 print();
  64 
  65 for (i = 0; i < 8; ++i) {
  66     name = 'property' + i;
  67     delete obj[name];
  68 }
  69 
  70 for (i = 0; i < 8; ++i) {
  71     name = 'property' + i;
  72     obj[name] = 'b' + i;
  73     printProperty(obj[name], findProperty(obj, name));
  74 }
  75 print();
  76 
  77 for (i = 0; i < 8; ++i) {
  78     name = 'property' + i;
  79     Object.defineProperty(obj, name, {get: function() {return i;}, set: function(v) {}, configurable: true});
  80     printProperty(obj[name], findProperty(obj, name));
  81 }
  82 print();
  83 
  84 for (i = 0; i < 8; ++i) {
  85     name = 'property' + i;
  86     delete obj[name];
  87 }
  88 
  89 for (i = 0; i < 8; ++i) {
  90     name = 'property' + i;
  91     obj[name] = 'c' + i;
  92     printProperty(obj[name], findProperty(obj, name));
  93 }
  94 print();
  95 
  96 for (i = 7; i > -1; --i) {
  97     name = 'property' + i;
  98     delete obj[name];
  99 }
 100 
 101 for (i = 0; i < 8; ++i) {
 102     name = 'property' + i;
 103     obj[name] = 'd' + i;
 104     printProperty(obj[name], findProperty(obj, name));
 105 }
 106 print();
 107 
 108 for (i = 0; i < 8; ++i) {
 109     name = 'property' + i;
 110     Object.defineProperty(obj, name, {get: function() {return i;}, set: function(v) {}});
 111     printProperty(obj[name], findProperty(obj, name));
 112 }