jdk8-mips64-public/nashorn: test/script/basic/JDK-8136544.js@1df40fe54cd6 (annotated)

test/script/basic/JDK-8136544.js@1df40fe54cd6 (annotated)

test/script/basic/JDK-8136544.js

Tue, 21 Mar 2017 13:41:57 -0700

author: asaha
date: Tue, 21 Mar 2017 13:41:57 -0700
changeset 2160: 1df40fe54cd6
parent 1534: 7b64298633b2
permissions: -rw-r--r--

Merge

 /*
  * 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
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  */
 /**
  * JDK-8136544: Call site switching to megamorphic causes incorrect property read
  *
  * @test
  * @fork
  * @option -Dnashorn.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);
 }