1 /*
   2  * Copyright (c) 2014, 2018, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #ifndef SHARE_VM_SERVICES_ALLOCATION_SITE_HPP
  26 #define SHARE_VM_SERVICES_ALLOCATION_SITE_HPP
  27 
  28 #include "memory/allocation.hpp"
  29 #include "utilities/nativeCallStack.hpp"
  30 
  31 // Allocation site represents a code path that makes a memory
  32 // allocation
  33 template <class E> class AllocationSite {
  34  private:
  35   NativeCallStack  _call_stack;
  36   E                e;
  37  public:
  38   AllocationSite(const NativeCallStack& stack) : _call_stack(stack) { }
  39   int hash() const { return _call_stack.hash(); }
  40   bool equals(const NativeCallStack& stack) const {
  41     return _call_stack.equals(stack);
  42   }
  43 
  44   bool equals(const AllocationSite<E>& other) const {
  45     return other.equals(_call_stack);
  46   }
  47 
  48   const NativeCallStack* call_stack() const {
  49     return &_call_stack;
  50   }
  51 
  52   // Information regarding this allocation
  53   E* data()             { return &e; }
  54   const E* peek() const { return &e; }
  55 };
  56 
  57 #endif  // SHARE_VM_SERVICES_ALLOCATION_SITE_HPP