view src/share/vm/runtime/extendedPC.hpp @ 7397:442f942757c0

8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack Summary: Set the value of MarkStackSize to a value based on the number of parallel marking threads with a reasonable minimum. Expand the marking stack if we have to restart marking due to an overflow up to a reasonable maximum. Allocate the underlying space for the marking stack from virtual memory. Reviewed-by: jmasa, brutisso
author johnc
date Mon, 01 Oct 2012 09:28:13 -0700
parents f95d63e2154a
children
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/*
 * Copyright (c) 1998, 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.
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 */

#ifndef SHARE_VM_RUNTIME_EXTENDEDPC_HPP
#define SHARE_VM_RUNTIME_EXTENDEDPC_HPP

// An ExtendedPC contains the _pc from a signal handler in a platform
// independent way.

class ExtendedPC VALUE_OBJ_CLASS_SPEC {
 private:
  address _pc;

 public:
  address pc() const { return _pc; }
  ExtendedPC(address pc) { _pc  = pc;   }
  ExtendedPC()           { _pc  = NULL; }
};

#endif // SHARE_VM_RUNTIME_EXTENDEDPC_HPP