src/hotspot/share/runtime/perfMemory.hpp

*** 1,7 ****
  /*
!  * Copyright (c) 2001, 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.
--- 1,7 ----
  /*
!  * Copyright (c) 2001, 2017, 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.
*** 111,127 ****
--- 111,129 ----
  /* the PerfMemory class manages creation, destruction,
   * and allocation of the PerfData region.
   */
  class PerfMemory : AllStatic {
      friend class VMStructs;
+     friend class PerfMemoryTest;
    private:
      static char*  _start;
      static char*  _end;
      static char*  _top;
      static size_t _capacity;
      static PerfDataPrologue*  _prologue;
      static jint   _initialized;
+     static bool   _destroyed;
  
      static void create_memory_region(size_t sizep);
      static void delete_memory_region();
  
    public:
*** 134,143 ****
--- 136,147 ----
      static char* start() { return _start; }
      static char* end() { return _end; }
      static size_t used() { return (size_t) (_top - _start); }
      static size_t capacity() { return _capacity; }
      static bool is_initialized() { return _initialized != 0; }
+     static bool is_destroyed() { return _destroyed; }
+     static bool is_useable() { return is_initialized() && !is_destroyed(); }
      static bool contains(char* addr) {
        return ((_start != NULL) && (addr >= _start) && (addr < _end));
      }
      static void mark_updated();