/*

 * Copyright (c) 2015, 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.

 *

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 */

/**

 * JDK-8136544: Call site switching to megamorphic causes incorrect property read

 *

 * @test

 * @option --unstable-relink-threshold=8

 * @run

 */

var ScriptContext = Java.type("javax.script.ScriptContext");

var ScriptEngineManager = Java.type("javax.script.ScriptEngineManager");

var m = new ScriptEngineManager();

var e = m.getEngineByName("nashorn");

var scope = e.getBindings(ScriptContext.ENGINE_SCOPE);

var MYVAR = "myvar";

function loopupVar() {

    try {

        e.eval(MYVAR);

        return true;

    } catch (e) {

        return false;

    }

}

// make sure we exercise callsite beyond megamorphic threshold we set

// in this test via nashorn.unstable.relink.threshold property

// In each iteration, callsite is exercised twice (two evals)

// So, LIMIT should be more than 4 to exercise megamorphic callsites.

var LIMIT = 5; // This LIMIT should be more than 4

for (var i = 0; i < LIMIT; i++) {

    // remove the variable and lookup

    delete scope[MYVAR];

    Assert.assertFalse(loopupVar(), "Expected true in iteration " + i);

    // set that variable and check again

    scope[MYVAR] = "foo";

    Assert.assertTrue(loopupVar(), "Expected false in iteration " + i);

}