60 lines
2.3 KiB
Java
60 lines
2.3 KiB
Java
/*
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* Copyright (c) 2019, 2022, 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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import jdk.test.whitebox.WhiteBox;
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import java.lang.reflect.Method;
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import java.util.HashMap;
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public class TestJIT {
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private static final WhiteBox WHITE_BOX = WhiteBox.getWhiteBox();
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static void doSomething() {
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HashMap<String,String> map = new HashMap<>();
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for (int i=0; i<400; i++) {
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// Call these methods so that the class/field/method references used
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// by these methods are resolved. This allows C2 to compile more code.
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String x = "Hello" + i;
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map.put(x, x);
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map.get(x);
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}
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}
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static public void main(String[] args) throws NoSuchMethodException {
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Method put_method = HashMap.class.getDeclaredMethod("put", Object.class, Object.class);
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Method get_method = HashMap.class.getDeclaredMethod("get", Object.class);
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Method test_method = TestJIT.class.getDeclaredMethod("doSomething");
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doSomething();
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// 4 == CompilerWhiteBoxTest.COMP_LEVEL_FULL_OPTIMIZATION => C2
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WHITE_BOX.enqueueMethodForCompilation(get_method, 4);
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WHITE_BOX.enqueueMethodForCompilation(put_method, 4);
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WHITE_BOX.enqueueMethodForCompilation(test_method, 4);
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// Try to start dynamic dumping while the above compilations are still in progesss
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System.exit(0);
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}
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}
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