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8022853: add ability to load uncompressed object and Klass references in a compressed environment to Unsafe

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Reviewed-by: coleenp, jrose, kvn
This commit is contained in:
Christian Thalinger 2015-04-27 09:02:41 -07:00
parent 021adf731b
commit 8cb760c280
3 changed files with 133 additions and 13 deletions
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46
hotspot/test/runtime/Unsafe/GetKlassPointerGetJavaMirror.java Normal file
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/*
* 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.
*/
/* @test
* @bug 8022853
* @library /testlibrary
* @modules java.base/sun.misc
* @run main GetKlassPointerGetJavaMirror
*/
import static com.oracle.java.testlibrary.Asserts.*;
import com.oracle.java.testlibrary.*;
import sun.misc.Unsafe;
public class GetKlassPointerGetJavaMirror {
public static void main(String args[]) throws Exception {
Unsafe unsafe = Utils.getUnsafe();
Object o = new GetKlassPointerGetJavaMirror();
final long metaspaceKlass = unsafe.getKlassPointer(o);
Class<?> c = unsafe.getJavaMirror(metaspaceKlass);
assertEquals(o.getClass(), c);
}
}