Mercurial > hg > truffle
view agent/src/share/classes/sun/jvm/hotspot/HotSpotSolarisVtblAccess.java @ 441:da9cb4e97a5f
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
6660573: G1: BigApps Failure : guarantee(satb_mq_set.completed_buffers_num() == 0,"invariant")
Summary: When exiting a mutator thread is removed from the thread list before it has a chance to flush its SATB and barrier queues. If GC happens at this moment the objects that are refererred from these queues can be moved, which will case a crash. The fix is simply to flush the buffers before removing a thread from the list.
Reviewed-by: jcoomes, tonyp
author | iveresov |
---|---|
date | Fri, 14 Nov 2008 14:23:05 -0800 |
parents | a61af66fc99e |
children | c18cbe5936b8 |
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/* * Copyright 2000-2005 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, * CA 95054 USA or visit www.sun.com if you need additional information or * have any questions. * */ package sun.jvm.hotspot; import java.util.*; import sun.jvm.hotspot.debugger.*; import sun.jvm.hotspot.types.*; import sun.jvm.hotspot.types.basic.*; /** This class implements the compiler-specific access to the vtbl for a given C++ type. */ public class HotSpotSolarisVtblAccess extends BasicVtblAccess { public HotSpotSolarisVtblAccess(SymbolLookup symbolLookup, String[] jvmLibNames) { super(symbolLookup, jvmLibNames); } protected String vtblSymbolForType(Type type) { String demangledSymbol = type.getName() + "::__vtbl"; return mangle(demangledSymbol); } //-------------------------------------------------------------------------------- // Internals only below this point // private String mangle(String symbol) { String[] parts = symbol.split("::"); StringBuffer mangled = new StringBuffer("__1c"); for (int i = 0; i < parts.length; i++) { int len = parts[i].length(); if (len >= 26) { mangled.append((char)('a' + (len / 26))); len = len % 26; } mangled.append((char)('A' + len)); mangled.append(parts[i]); } mangled.append("_"); return mangled.toString(); } }