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src/hotspot/share/memory/metaspace.hpp

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   1 /*
   2  * Copyright (c) 2011, 2017, 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  *


 218 
 219   static void print_compressed_class_space(outputStream* st, const char* requested_addr = 0) NOT_LP64({});
 220 
 221   // Return TRUE only if UseCompressedClassPointers is True.
 222   static bool using_class_space() {
 223     return NOT_LP64(false) LP64_ONLY(UseCompressedClassPointers);
 224   }
 225 
 226   static bool is_class_space_allocation(MetadataType mdType) {
 227     return mdType == ClassType && using_class_space();
 228   }
 229 
 230   static bool initialized() { return _initialized; }
 231 
 232 };
 233 
 234 // Manages the metaspace portion belonging to a class loader
 235 class ClassLoaderMetaspace : public CHeapObj<mtClass> {
 236   friend class CollectedHeap; // For expand_and_allocate()
 237   friend class ZCollectedHeap; // For expand_and_allocate()

 238   friend class Metaspace;
 239   friend class MetaspaceUtils;
 240   friend class metaspace::PrintCLDMetaspaceInfoClosure;
 241   friend class VM_CollectForMetadataAllocation; // For expand_and_allocate()
 242 
 243  private:
 244 
 245   void initialize(Mutex* lock, Metaspace::MetaspaceType type);
 246 
 247   // Initialize the first chunk for a Metaspace.  Used for
 248   // special cases such as the boot class loader, reflection
 249   // class loader and anonymous class loader.
 250   void initialize_first_chunk(Metaspace::MetaspaceType type, Metaspace::MetadataType mdtype);
 251   metaspace::Metachunk* get_initialization_chunk(Metaspace::MetaspaceType type, Metaspace::MetadataType mdtype);
 252 
 253   const Metaspace::MetaspaceType _space_type;
 254   Mutex* const  _lock;
 255   metaspace::SpaceManager* _vsm;
 256   metaspace::SpaceManager* _class_vsm;
 257 


   1 /*
   2  * Copyright (c) 2011, 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  *


 218 
 219   static void print_compressed_class_space(outputStream* st, const char* requested_addr = 0) NOT_LP64({});
 220 
 221   // Return TRUE only if UseCompressedClassPointers is True.
 222   static bool using_class_space() {
 223     return NOT_LP64(false) LP64_ONLY(UseCompressedClassPointers);
 224   }
 225 
 226   static bool is_class_space_allocation(MetadataType mdType) {
 227     return mdType == ClassType && using_class_space();
 228   }
 229 
 230   static bool initialized() { return _initialized; }
 231 
 232 };
 233 
 234 // Manages the metaspace portion belonging to a class loader
 235 class ClassLoaderMetaspace : public CHeapObj<mtClass> {
 236   friend class CollectedHeap; // For expand_and_allocate()
 237   friend class ZCollectedHeap; // For expand_and_allocate()
 238   friend class ShenandoahHeap; // For expand_and_allocate()
 239   friend class Metaspace;
 240   friend class MetaspaceUtils;
 241   friend class metaspace::PrintCLDMetaspaceInfoClosure;
 242   friend class VM_CollectForMetadataAllocation; // For expand_and_allocate()
 243 
 244  private:
 245 
 246   void initialize(Mutex* lock, Metaspace::MetaspaceType type);
 247 
 248   // Initialize the first chunk for a Metaspace.  Used for
 249   // special cases such as the boot class loader, reflection
 250   // class loader and anonymous class loader.
 251   void initialize_first_chunk(Metaspace::MetaspaceType type, Metaspace::MetadataType mdtype);
 252   metaspace::Metachunk* get_initialization_chunk(Metaspace::MetaspaceType type, Metaspace::MetadataType mdtype);
 253 
 254   const Metaspace::MetaspaceType _space_type;
 255   Mutex* const  _lock;
 256   metaspace::SpaceManager* _vsm;
 257   metaspace::SpaceManager* _class_vsm;
 258 


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