xref: /openjdk10/nashorn/test/script/nosecurity/JDK-8044851.js

/*
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 * 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
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 *
 * 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.
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 */

/**
 * JDK-8044851: nashorn properties leak memory
 *
 * @test
 * @option -Dnashorn.debug=true
 * @fork
 */

var Property = Java.type("jdk.nashorn.internal.runtime.Property");
var PropertyMap = Java.type("jdk.nashorn.internal.runtime.PropertyMap");

// Class objects
var objectCls = Java.type("java.lang.Object").class;
var propertyCls = Property.class;
var propertyMapCls = PropertyMap.class;

// Method objects
var findPropertyMethod = propertyMapCls.getMethod("findProperty", objectCls);
var getKeyMethod = propertyCls.getMethod("getKey");
var isSpillMethod = propertyCls.getMethod("isSpill");
var getSlotMethod = propertyCls.getMethod("getSlot");

function printProperty(value, property) {
    print(value, getKeyMethod.invoke(property),
        isSpillMethod.invoke(property) ? "spill" : "field", getSlotMethod.invoke(property));
}

function findProperty(obj, name) {
    var map = Debug.map(obj);
    return findPropertyMethod.invoke(map, name);
}

var obj = {}, i, name;

for (i = 0; i < 8; ++i) {
    name = 'property' + i;
    obj[name] = 'a' + i;
    printProperty(obj[name], findProperty(obj, name));
}
print();

for (i = 0; i < 8; ++i) {
    name = 'property' + i;
    delete obj[name];
}

for (i = 0; i < 8; ++i) {
    name = 'property' + i;
    obj[name] = 'b' + i;
    printProperty(obj[name], findProperty(obj, name));
}
print();

for (i = 0; i < 8; ++i) {
    name = 'property' + i;
    Object.defineProperty(obj, name, {get: function() {return i;}, set: function(v) {}, configurable: true});
    printProperty(obj[name], findProperty(obj, name));
}
print();

for (i = 0; i < 8; ++i) {
    name = 'property' + i;
    delete obj[name];
}

for (i = 0; i < 8; ++i) {
    name = 'property' + i;
    obj[name] = 'c' + i;
    printProperty(obj[name], findProperty(obj, name));
}
print();

for (i = 7; i > -1; --i) {
    name = 'property' + i;
    delete obj[name];
}

for (i = 0; i < 8; ++i) {
    name = 'property' + i;
    obj[name] = 'd' + i;
    printProperty(obj[name], findProperty(obj, name));
}
print();

for (i = 0; i < 8; ++i) {
    name = 'property' + i;
    Object.defineProperty(obj, name, {get: function() {return i;}, set: function(v) {}});
    printProperty(obj[name], findProperty(obj, name));
}