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test/compiler/gcbarriers/G1CrashTest.java@fb9d124d9192 (annotated)

test/compiler/gcbarriers/G1CrashTest.java

Wed, 21 May 2014 10:56:41 -0700

author

katleman

date

Wed, 21 May 2014 10:56:41 -0700

changeset 6672

fb9d124d9192

parent 0

f90c822e73f8

permissions

-rw-r--r--

Added tag jdk8u20-b15 for changeset 8c785f9bde6f

aoqi@0	1	/*
aoqi@0	2	* Copyright (c) 2013, 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 8023472
aoqi@0	28	* @summary C2 optimization breaks with G1
aoqi@0	29	*
aoqi@0	30	* @run main/othervm -Xbatch -XX:+IgnoreUnrecognizedVMOptions -XX:-TieredCompilation -Dcount=100000 G1CrashTest
aoqi@0	31	*
aoqi@0	32	* @author pbiswal@palantir.com
aoqi@0	33	*/
aoqi@0	34
aoqi@0	35	public class G1CrashTest {
aoqi@0	36	static Object[] set = new Object[11];
aoqi@0	37
aoqi@0	38	public static void main(String[] args) throws InterruptedException {
aoqi@0	39	for (int j = 0; j < Integer.getInteger("count"); j++) {
aoqi@0	40	Object key = new Object();
aoqi@0	41	insertKey(key);
aoqi@0	42	if (j > set.length / 2) {
aoqi@0	43	Object[] oldKeys = set;
aoqi@0	44	set = new Object[2 * set.length - 1];
aoqi@0	45	for (Object o : oldKeys) {
aoqi@0	46	if (o != null)
aoqi@0	47	insertKey(o);
aoqi@0	48	}
aoqi@0	49	}
aoqi@0	50	}
aoqi@0	51	}
aoqi@0	52
aoqi@0	53	static void insertKey(Object key) {
aoqi@0	54	int hash = key.hashCode() & 0x7fffffff;
aoqi@0	55	int index = hash % set.length;
aoqi@0	56	Object cur = set[index];
aoqi@0	57	if (cur == null)
aoqi@0	58	set[index] = key;
aoqi@0	59	else
aoqi@0	60	insertKeyRehash(key, index, hash, cur);
aoqi@0	61	}
aoqi@0	62
aoqi@0	63	static void insertKeyRehash(Object key, int index, int hash, Object cur) {
aoqi@0	64	int loopIndex = index;
aoqi@0	65	int firstRemoved = -1;
aoqi@0	66	do {
aoqi@0	67	if (cur == "dead")
aoqi@0	68	firstRemoved = 1;
aoqi@0	69	index--;
aoqi@0	70	if (index < 0)
aoqi@0	71	index += set.length;
aoqi@0	72	cur = set[index];
aoqi@0	73	if (cur == null) {
aoqi@0	74	if (firstRemoved != -1)
aoqi@0	75	set[firstRemoved] = "dead";
aoqi@0	76	else
aoqi@0	77	set[index] = key;
aoqi@0	78	return;
aoqi@0	79	}
aoqi@0	80	} while (index != loopIndex);
aoqi@0	81	if (firstRemoved != -1)
aoqi@0	82	set[firstRemoved] = null;
aoqi@0	83	}
aoqi@0	84	}