jdk-sandbox: hotspot/test/runtime/Unsafe/GetUncompressedObject.java@b8d532cb6420 (annotated)

30288 476c276de939 8022853: add ability to load uncompressed object and Klass references in a compressed environment to Unsafe twisti parents: diff changeset	1	/*
476c276de939 8022853: add ability to load uncompressed object and Klass references in a compressed environment to Unsafe twisti parents: diff changeset	2	* Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
476c276de939 8022853: add ability to load uncompressed object and Klass references in a compressed environment to Unsafe twisti parents: diff changeset	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
476c276de939 8022853: add ability to load uncompressed object and Klass references in a compressed environment to Unsafe twisti parents: diff changeset	4	*
476c276de939 8022853: add ability to load uncompressed object and Klass references in a compressed environment to Unsafe twisti parents: diff changeset	5	* This code is free software; you can redistribute it and/or modify it
476c276de939 8022853: add ability to load uncompressed object and Klass references in a compressed environment to Unsafe twisti parents: diff changeset	6	* under the terms of the GNU General Public License version 2 only, as
476c276de939 8022853: add ability to load uncompressed object and Klass references in a compressed environment to Unsafe twisti parents: diff changeset	7	* published by the Free Software Foundation.
476c276de939 8022853: add ability to load uncompressed object and Klass references in a compressed environment to Unsafe twisti parents: diff changeset	8	*
476c276de939 8022853: add ability to load uncompressed object and Klass references in a compressed environment to Unsafe twisti parents: diff changeset	9	* This code is distributed in the hope that it will be useful, but WITHOUT
476c276de939 8022853: add ability to load uncompressed object and Klass references in a compressed environment to Unsafe twisti parents: diff changeset	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
476c276de939 8022853: add ability to load uncompressed object and Klass references in a compressed environment to Unsafe twisti parents: diff changeset	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
476c276de939 8022853: add ability to load uncompressed object and Klass references in a compressed environment to Unsafe twisti parents: diff changeset	12	* version 2 for more details (a copy is included in the LICENSE file that
476c276de939 8022853: add ability to load uncompressed object and Klass references in a compressed environment to Unsafe twisti parents: diff changeset	13	* accompanied this code).
476c276de939 8022853: add ability to load uncompressed object and Klass references in a compressed environment to Unsafe twisti parents: diff changeset	14	*
476c276de939 8022853: add ability to load uncompressed object and Klass references in a compressed environment to Unsafe twisti parents: diff changeset	15	* You should have received a copy of the GNU General Public License version
476c276de939 8022853: add ability to load uncompressed object and Klass references in a compressed environment to Unsafe twisti parents: diff changeset	16	* 2 along with this work; if not, write to the Free Software Foundation,
476c276de939 8022853: add ability to load uncompressed object and Klass references in a compressed environment to Unsafe twisti parents: diff changeset	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
476c276de939 8022853: add ability to load uncompressed object and Klass references in a compressed environment to Unsafe twisti parents: diff changeset	18	*
476c276de939 8022853: add ability to load uncompressed object and Klass references in a compressed environment to Unsafe twisti parents: diff changeset	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
476c276de939 8022853: add ability to load uncompressed object and Klass references in a compressed environment to Unsafe twisti parents: diff changeset	20	* or visit www.oracle.com if you need additional information or have any
476c276de939 8022853: add ability to load uncompressed object and Klass references in a compressed environment to Unsafe twisti parents: diff changeset	21	* questions.
476c276de939 8022853: add ability to load uncompressed object and Klass references in a compressed environment to Unsafe twisti parents: diff changeset	22	*/
476c276de939 8022853: add ability to load uncompressed object and Klass references in a compressed environment to Unsafe twisti parents: diff changeset	23
476c276de939 8022853: add ability to load uncompressed object and Klass references in a compressed environment to Unsafe twisti parents: diff changeset	24	/* @test
476c276de939 8022853: add ability to load uncompressed object and Klass references in a compressed environment to Unsafe twisti parents: diff changeset	25	* @bug 8022853
476c276de939 8022853: add ability to load uncompressed object and Klass references in a compressed environment to Unsafe twisti parents: diff changeset	26	* @library /testlibrary
476c276de939 8022853: add ability to load uncompressed object and Klass references in a compressed environment to Unsafe twisti parents: diff changeset	27	* @modules java.base/sun.misc
30604 b8d532cb6420 8067013: Rename the com.oracle.java.testlibary package ykantser parents: 30288 diff changeset	28	* @build jdk.test.lib.*
30288 476c276de939 8022853: add ability to load uncompressed object and Klass references in a compressed environment to Unsafe twisti parents: diff changeset	29	* @run main GetUncompressedObject
476c276de939 8022853: add ability to load uncompressed object and Klass references in a compressed environment to Unsafe twisti parents: diff changeset	30	*/
476c276de939 8022853: add ability to load uncompressed object and Klass references in a compressed environment to Unsafe twisti parents: diff changeset	31
30604 b8d532cb6420 8067013: Rename the com.oracle.java.testlibary package ykantser parents: 30288 diff changeset	32	import static jdk.test.lib.Asserts.*;
30288 476c276de939 8022853: add ability to load uncompressed object and Klass references in a compressed environment to Unsafe twisti parents: diff changeset	33
30604 b8d532cb6420 8067013: Rename the com.oracle.java.testlibary package ykantser parents: 30288 diff changeset	34	import jdk.test.lib.*;
30288 476c276de939 8022853: add ability to load uncompressed object and Klass references in a compressed environment to Unsafe twisti parents: diff changeset	35	import sun.misc.Unsafe;
476c276de939 8022853: add ability to load uncompressed object and Klass references in a compressed environment to Unsafe twisti parents: diff changeset	36
476c276de939 8022853: add ability to load uncompressed object and Klass references in a compressed environment to Unsafe twisti parents: diff changeset	37	public class GetUncompressedObject {
476c276de939 8022853: add ability to load uncompressed object and Klass references in a compressed environment to Unsafe twisti parents: diff changeset	38
476c276de939 8022853: add ability to load uncompressed object and Klass references in a compressed environment to Unsafe twisti parents: diff changeset	39	public static void main(String args[]) throws Exception {
476c276de939 8022853: add ability to load uncompressed object and Klass references in a compressed environment to Unsafe twisti parents: diff changeset	40	Unsafe unsafe = Utils.getUnsafe();
476c276de939 8022853: add ability to load uncompressed object and Klass references in a compressed environment to Unsafe twisti parents: diff changeset	41
476c276de939 8022853: add ability to load uncompressed object and Klass references in a compressed environment to Unsafe twisti parents: diff changeset	42	// Allocate some memory and fill it with non-zero values.
476c276de939 8022853: add ability to load uncompressed object and Klass references in a compressed environment to Unsafe twisti parents: diff changeset	43	final int size = 32;
476c276de939 8022853: add ability to load uncompressed object and Klass references in a compressed environment to Unsafe twisti parents: diff changeset	44	final long address = unsafe.allocateMemory(size);
476c276de939 8022853: add ability to load uncompressed object and Klass references in a compressed environment to Unsafe twisti parents: diff changeset	45	unsafe.setMemory(address, size, (byte) 0x23);
476c276de939 8022853: add ability to load uncompressed object and Klass references in a compressed environment to Unsafe twisti parents: diff changeset	46
476c276de939 8022853: add ability to load uncompressed object and Klass references in a compressed environment to Unsafe twisti parents: diff changeset	47	// The only thing we can do is check for null-ness.
476c276de939 8022853: add ability to load uncompressed object and Klass references in a compressed environment to Unsafe twisti parents: diff changeset	48	// So, store a null somewhere.
476c276de939 8022853: add ability to load uncompressed object and Klass references in a compressed environment to Unsafe twisti parents: diff changeset	49	unsafe.putAddress(address + 16, 0);
476c276de939 8022853: add ability to load uncompressed object and Klass references in a compressed environment to Unsafe twisti parents: diff changeset	50
476c276de939 8022853: add ability to load uncompressed object and Klass references in a compressed environment to Unsafe twisti parents: diff changeset	51	Object nullObj = unsafe.getUncompressedObject(address + 16);
476c276de939 8022853: add ability to load uncompressed object and Klass references in a compressed environment to Unsafe twisti parents: diff changeset	52	if (nullObj != null) {
476c276de939 8022853: add ability to load uncompressed object and Klass references in a compressed environment to Unsafe twisti parents: diff changeset	53	throw new InternalError("should be null");
476c276de939 8022853: add ability to load uncompressed object and Klass references in a compressed environment to Unsafe twisti parents: diff changeset	54	}
476c276de939 8022853: add ability to load uncompressed object and Klass references in a compressed environment to Unsafe twisti parents: diff changeset	55	}
476c276de939 8022853: add ability to load uncompressed object and Klass references in a compressed environment to Unsafe twisti parents: diff changeset	56
476c276de939 8022853: add ability to load uncompressed object and Klass references in a compressed environment to Unsafe twisti parents: diff changeset	57	}

author	ykantser
	Mon, 04 May 2015 16:30:07 +0200
changeset 30604	b8d532cb6420
parent 30288	476c276de939
child 36851	03e2f4d0a421
permissions	-rw-r--r--