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view src/share/vm/prims/nativeLookup.hpp @ 2149:7e37af9d69ef

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7011379: G1: overly long concurrent marking cycles Summary: This changeset introduces filtering of SATB buffers at the point when they are about to be enqueued. If this filtering clears enough entries on each buffer, the buffer can then be re-used and not enqueued. This cuts down the number of SATB buffers that need to be processed by the concurrent marking threads. Reviewed-by: johnc, ysr
author tonyp
date Wed, 19 Jan 2011 09:35:17 -0500
parents f95d63e2154a
children 0382d2b469b2
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/*
 * Copyright (c) 1997, 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.
 *
 */

#ifndef SHARE_VM_PRIMS_NATIVELOOKUP_HPP
#define SHARE_VM_PRIMS_NATIVELOOKUP_HPP

#include "runtime/handles.hpp"
#include "utilities/top.hpp"

// NativeLookup provides an interface for finding DLL entry points for
// Java native functions.

class NativeLookup : AllStatic {
 private:
  // JNI name computation
  static char* pure_jni_name(methodHandle method);
  static char* long_jni_name(methodHandle method);

  // Style specific lookup
  static address lookup_style(methodHandle method, char* pure_name, const char* long_name, int args_size, bool os_style, bool& in_base_library, TRAPS);
  static address lookup_base (methodHandle method, bool& in_base_library, TRAPS);
  static address lookup_entry(methodHandle method, bool& in_base_library, TRAPS);
  static address lookup_entry_prefixed(methodHandle method, bool& in_base_library, TRAPS);
 public:
  // Lookup native function. May throw UnsatisfiedLinkError.
  static address lookup(methodHandle method, bool& in_base_library, TRAPS);

  // Lookup native functions in base library.
  static address base_library_lookup(const char* class_name, const char* method_name, const char* signature);
};

#endif // SHARE_VM_PRIMS_NATIVELOOKUP_HPP