sundar@1534: /*
sundar@1534:  * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
sundar@1534:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
sundar@1534:  *
sundar@1534:  * This code is free software; you can redistribute it and/or modify it
sundar@1534:  * under the terms of the GNU General Public License version 2 only, as
sundar@1534:  * published by the Free Software Foundation.
sundar@1534:  *
sundar@1534:  * This code is distributed in the hope that it will be useful, but WITHOUT
sundar@1534:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
sundar@1534:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
sundar@1534:  * version 2 for more details (a copy is included in the LICENSE file that
sundar@1534:  * accompanied this code).
sundar@1534:  *
sundar@1534:  * You should have received a copy of the GNU General Public License version
sundar@1534:  * 2 along with this work; if not, write to the Free Software Foundation,
sundar@1534:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
sundar@1534:  *
sundar@1534:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
sundar@1534:  * or visit www.oracle.com if you need additional information or have any
sundar@1534:  * questions.
sundar@1534:  */
sundar@1534: 
sundar@1534: /**
sundar@1534:  * JDK-8136544: Call site switching to megamorphic causes incorrect property read
sundar@1534:  *
sundar@1534:  * @test
sundar@1534:  * @fork
sundar@1534:  * @option -Dnashorn.unstable.relink.threshold=8
sundar@1534:  * @run
sundar@1534:  */
sundar@1534: 
sundar@1534: var ScriptContext = Java.type("javax.script.ScriptContext");
sundar@1534: var ScriptEngineManager = Java.type("javax.script.ScriptEngineManager");
sundar@1534: var m = new ScriptEngineManager();
sundar@1534: var e = m.getEngineByName("nashorn");
sundar@1534: 
sundar@1534: var scope = e.getBindings(ScriptContext.ENGINE_SCOPE);
sundar@1534: var MYVAR = "myvar";
sundar@1534: 
sundar@1534: function loopupVar() {
sundar@1534:     try {
sundar@1534:         e.eval(MYVAR);
sundar@1534:         return true;
sundar@1534:     } catch (e) {
sundar@1534:         return false;
sundar@1534:     }
sundar@1534: }
sundar@1534: 
sundar@1534: // make sure we exercise callsite beyond megamorphic threshold we set
sundar@1534: // in this test via nashorn.unstable.relink.threshold property
sundar@1534: // In each iteration, callsite is exercised twice (two evals)
sundar@1534: // So, LIMIT should be more than 4 to exercise megamorphic callsites.
sundar@1534: 
sundar@1534: var LIMIT = 5; // This LIMIT should be more than 4
sundar@1534: 
sundar@1534: for (var i = 0; i < LIMIT; i++) {
sundar@1534:     // remove the variable and lookup
sundar@1534:     delete scope[MYVAR];
sundar@1534:     Assert.assertFalse(loopupVar(), "Expected true in iteration " + i);
sundar@1534: 
sundar@1534:     // set that variable and check again
sundar@1534:     scope[MYVAR] = "foo";
sundar@1534:     Assert.assertTrue(loopupVar(), "Expected false in iteration " + i);
sundar@1534: }