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view test/compiler/6895383/Test.java @ 1960:878b57474103
6978187: G1: assert(ParallelGCThreads> 1 || n_yielded() == _hrrs->occupied()) strikes again
Summary: An evacuation failure while copying the roots caused an object, A, to be forwarded to itself. During the subsequent RSet updating a reference to A was processed causing the reference to be added to the RSet of A's heap region. As a result of adding to the remembered set we ran into the issue described in 6930581 - the sparse table expanded and the RSet scanning code walked the cards in one instance of RHashTable (_cur) while the occupied() counts the cards in the expanded table (_next).
Reviewed-by: tonyp, iveresov
author | johnc |
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date | Tue, 16 Nov 2010 14:07:33 -0800 |
parents | c18cbe5936b8 |
children | 0a8e0d4345b3 |
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/* * Copyright (c) 2009, 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 6895383 * @summary JCK test throws NPE for method compiled with Escape Analysis * * @run main/othervm -Xcomp Test */ import java.util.*; import java.util.concurrent.*; public class Test { public static void main(String argv[]) { Test test = new Test(); test.testRemove1_IndexOutOfBounds(); test.testAddAll1_IndexOutOfBoundsException(); } public void testRemove1_IndexOutOfBounds() { CopyOnWriteArrayList c = new CopyOnWriteArrayList(); } public void testAddAll1_IndexOutOfBoundsException() { try { CopyOnWriteArrayList c = new CopyOnWriteArrayList(); c.addAll(-1, new LinkedList()); // should throw IndexOutOfBoundsException } catch (IndexOutOfBoundsException e) { } } }