Mercurial > hg > truffle
view test/compiler/6857159/Test6857159.java @ 3293:1f4413413144
7039089: G1: changeset for 7037276 broke heap verification, and related cleanups
Summary: In G1 heap verification, we no longer scan perm to G1-collected heap refs as part of process_strong_roots() but rather in a separate explicit oop iteration over the perm gen. This preserves the original perm card-marks. Added a new assertion in younger_refs_iterate() to catch a simple subcase where the user may have forgotten a prior save_marks() call, as happened in the case of G1's attempt to iterate perm to G1 refs when verifying the heap before exit. The assert was deliberately weakened for ParNew+CMS and will be fixed for that combination in a future CR. Also made some (non-G1) cleanups related to code and comments obsoleted by the migration of Symbols to the native heap.
Reviewed-by: iveresov, jmasa, tonyp
author | ysr |
---|---|
date | Tue, 26 Apr 2011 21:17:24 -0700 |
parents | 0a8e0d4345b3 |
children |
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/* * Copyright (c) 2009, 2010, 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 6857159 * @summary local schedule failed with checkcast of Thread.currentThread() * * @run shell Test6857159.sh */ public class Test6857159 extends Thread { static class ct0 extends Test6857159 { public void message() { // System.out.println("message"); } public void run() { message(); ct0 ct = (ct0) Thread.currentThread(); ct.message(); } } static class ct1 extends ct0 { public void message() { // System.out.println("message"); } } static class ct2 extends ct0 { public void message() { // System.out.println("message"); } } public static void main(String[] args) throws Exception { for (int i = 0; i < 20000; i++) { Thread t = null; switch (i % 3) { case 0: t = new ct0(); break; case 1: t = new ct1(); break; case 2: t = new ct2(); break; } t.start(); t.join(); } } }