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test/compiler/6968348/Test6968348.java@dbb05f6d93c4 (annotated)

test/compiler/6968348/Test6968348.java

Mon, 28 Jul 2014 15:06:38 -0700

author

fzhinkin

date

Mon, 28 Jul 2014 15:06:38 -0700

changeset 6997

dbb05f6d93c4

parent 0

f90c822e73f8

permissions

-rw-r--r--

8051344: JVM crashed in Compile::start() during method parsing w/ UseRTMDeopt turned on
Summary: call rtm_deopt() only if there were no compilation bailouts before.
Reviewed-by: kvn

aoqi@0	1	/*
aoqi@0	2	* Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
aoqi@0	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0	4	*
aoqi@0	5	* This code is free software; you can redistribute it and/or modify it
aoqi@0	6	* under the terms of the GNU General Public License version 2 only, as
aoqi@0	7	* published by the Free Software Foundation.
aoqi@0	8	*
aoqi@0	9	* This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
aoqi@0	12	* version 2 for more details (a copy is included in the LICENSE file that
aoqi@0	13	* accompanied this code).
aoqi@0	14	*
aoqi@0	15	* You should have received a copy of the GNU General Public License version
aoqi@0	16	* 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0	18	*
aoqi@0	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0	20	* or visit www.oracle.com if you need additional information or have any
aoqi@0	21	* questions.
aoqi@0	22	*
aoqi@0	23	*/
aoqi@0	24
aoqi@0	25	/**
aoqi@0	26	* @test
aoqi@0	27	* @bug 6968348
aoqi@0	28	* @summary Byteswapped memory access can point to wrong location after JIT
aoqi@0	29	*
aoqi@0	30	* @run main Test6968348
aoqi@0	31	*/
aoqi@0	32
aoqi@0	33	import sun.misc.Unsafe;
aoqi@0	34	import java.lang.reflect.*;
aoqi@0	35
aoqi@0	36	public class Test6968348 {
aoqi@0	37	static Unsafe unsafe;
aoqi@0	38	static final long[] buffer = new long[4096];
aoqi@0	39	static int array_long_base_offset;
aoqi@0	40
aoqi@0	41	public static void main(String[] args) throws Exception {
aoqi@0	42	Class c = Test6968348.class.getClassLoader().loadClass("sun.misc.Unsafe");
aoqi@0	43	Field f = c.getDeclaredField("theUnsafe");
aoqi@0	44	f.setAccessible(true);
aoqi@0	45	unsafe = (Unsafe)f.get(c);
aoqi@0	46	array_long_base_offset = unsafe.arrayBaseOffset(long[].class);
aoqi@0	47
aoqi@0	48	for (int n = 0; n < 100000; n++) {
aoqi@0	49	test();
aoqi@0	50	}
aoqi@0	51	}
aoqi@0	52
aoqi@0	53	public static void test() {
aoqi@0	54	for (long i = array_long_base_offset; i < 4096; i += 8) {
aoqi@0	55	unsafe.putLong(buffer, i, Long.reverseBytes(i));
aoqi@0	56	}
aoqi@0	57	}
aoqi@0	58	}