1 /*
   2  * Copyright (c) 2018, 2019, 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_MEMORY_METASPACE_METADEBUG_HPP
  26 #define SHARE_MEMORY_METASPACE_METADEBUG_HPP
  27 
  28 #include "memory/allocation.hpp"
  29 
  30 namespace metaspace {
  31 
  32 class Metadebug : AllStatic {
  33   // Debugging support for Metaspaces
  34   static int _allocation_fail_alot_count;
  35 
  36  public:
  37 
  38   static void init_allocation_fail_alot_count();
  39 #ifdef ASSERT
  40   static bool test_metadata_failure();
  41 #endif
  42 };
  43 
  44 #ifdef ASSERT
  45 #define EVERY_NTH(n)          \
  46 { static int counter_ = 0;    \
  47   if (n > 0) {                \
  48     counter_ ++;              \
  49     if (counter_ > n) {       \
  50       counter_ = 0;           \
  51 
  52 #define END_EVERY_NTH         } } }
  53 #endif // ASSERT
  54 
  55 } // namespace metaspace
  56 
  57 #endif // SHARE_MEMORY_METASPACE_METADEBUG_HPP