| /* |
| * 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. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 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); |
| } |