view src/share/vm/services/allocationSite.hpp @ 9038:4b8584c24ff4

8215934: G1 Old Gen MemoryPool CollectionUsage.used values don't reflect mixed GC results Summary: Memory pools can now be optional collection participants, e.g., G1 Old Gen in an incremental collection. Reviewed-by: tschatzl, jcbeyler, andrew
author phh
date Mon, 28 Jan 2019 17:51:10 +0000
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/*
 * Copyright (c) 2014, 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_SERVICES_ALLOCATION_SITE_HPP
#define SHARE_VM_SERVICES_ALLOCATION_SITE_HPP

#include "memory/allocation.hpp"
#include "utilities/nativeCallStack.hpp"

// Allocation site represents a code path that makes a memory
// allocation
template <class E> class AllocationSite VALUE_OBJ_CLASS_SPEC {
 private:
  NativeCallStack  _call_stack;
  E                e;
 public:
  AllocationSite(const NativeCallStack& stack) : _call_stack(stack) { }
  int hash() const { return _call_stack.hash(); }
  bool equals(const NativeCallStack& stack) const {
    return _call_stack.equals(stack);
  }

  bool equals(const AllocationSite<E>& other) const {
    return other.equals(_call_stack);
  }

  const NativeCallStack* call_stack() const {
    return &_call_stack;
  }

  // Information regarding this allocation
  E* data()             { return &e; }
  const E* peek() const { return &e; }
};

#endif  // SHARE_VM_SERVICES_ALLOCATION_SITE_HPP