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