src/hotspot/share/utilities/nativeCallStack.hpp

*** 1,7 ****
  /*
!  * 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.
--- 1,7 ----
  /*
!  * Copyright (c) 2014, 2018, 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.
*** 49,70 ****
   *    This number has impacts on how much memory to be used by native
   *    memory tracking.
   * 2. The class is strict stack object, no heap or virtual memory can be allocated
   *    from it.
   */
  class NativeCallStack : public StackObj {
!  public:
!   static const NativeCallStack EMPTY_STACK;
  
!  private:
    address       _stack[NMT_TrackingStackDepth];
    unsigned int  _hash_value;
  
!  public:
    NativeCallStack(int toSkip = 0, bool fillStack = false);
    NativeCallStack(address* pc, int frameCount);
  
  
    // if it is an empty stack
    inline bool is_empty() const {
      return _stack[0] == NULL;
    }
--- 49,75 ----
   *    This number has impacts on how much memory to be used by native
   *    memory tracking.
   * 2. The class is strict stack object, no heap or virtual memory can be allocated
   *    from it.
   */
+ class MemTracker;
+ 
  class NativeCallStack : public StackObj {
!   friend class MemTracker;
  
! private:
    address       _stack[NMT_TrackingStackDepth];
    unsigned int  _hash_value;
  
!   static NativeCallStack EMPTY_STACK;
! public:
    NativeCallStack(int toSkip = 0, bool fillStack = false);
    NativeCallStack(address* pc, int frameCount);
  
+   static inline const NativeCallStack& empty_stack() {
+     return EMPTY_STACK;
+   }
  
    // if it is an empty stack
    inline bool is_empty() const {
      return _stack[0] == NULL;
    }