1 /*
   2  * Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved.
   3  * Copyright (c) 2020 SAP SE. All rights reserved.
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This code is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License version 2 only, as
   8  * published by the Free Software Foundation.
   9  *
  10  * This code is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13  * version 2 for more details (a copy is included in the LICENSE file that
  14  * accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License version
  17  * 2 along with this work; if not, write to the Free Software Foundation,
  18  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  19  *
  20  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  21  * or visit www.oracle.com if you need additional information or have any
  22  * questions.
  23  *
  24  */
  25 
  26 #include "precompiled.hpp"
  27 
  28 #include "memory/metaspace/msChunkManager.hpp"
  29 #include "memory/metaspace/msCommitLimiter.hpp"
  30 #include "memory/metaspace/msContext.hpp"
  31 #include "memory/metaspace/msVirtualSpaceList.hpp"
  32 #include "utilities/debug.hpp"
  33 #include "utilities/globalDefinitions.hpp"
  34 #include "utilities/ostream.hpp"
  35 
  36 namespace metaspace {
  37 
  38 MetaspaceContext* MetaspaceContext::_class_space_context = NULL;
  39 MetaspaceContext* MetaspaceContext::_nonclass_space_context = NULL;
  40 
  41 // Destroys the context: deletes chunkmanager and virtualspacelist.
  42 //  If this is a non-expandable context over an existing space, that space remains
  43 //  untouched, otherwise all memory is unmapped.
  44 // Note: the standard metaspace contexts (non-class context and class context) are
  45 //  never deleted. This code only exists for the sake of tests and for future reuse
  46 //  of metaspace contexts in different scenarios.
  47 MetaspaceContext::~MetaspaceContext() {
  48   delete _cm;
  49   delete _vslist;
  50 }
  51 
  52 // Create a new, empty, expandable metaspace context.
  53 MetaspaceContext* MetaspaceContext::create_expandable_context(const char* name, CommitLimiter* commit_limiter) {
  54   VirtualSpaceList* vsl = new VirtualSpaceList(name, commit_limiter);
  55   ChunkManager* cm = new ChunkManager(name, vsl);
  56   return new MetaspaceContext(name, vsl, cm);
  57 }
  58 
  59 // Create a new, empty, non-expandable metaspace context atop of an externally provided space.
  60 MetaspaceContext* MetaspaceContext::create_nonexpandable_context(const char* name, ReservedSpace rs, CommitLimiter* commit_limiter) {
  61   VirtualSpaceList* vsl = new VirtualSpaceList(name, rs, commit_limiter);
  62   ChunkManager* cm = new ChunkManager(name, vsl);
  63   return new MetaspaceContext(name, vsl, cm);
  64 }
  65 
  66 void MetaspaceContext::initialize_class_space_context(ReservedSpace rs) {
  67   _class_space_context = create_nonexpandable_context("class-space", rs, CommitLimiter::globalLimiter());
  68 }
  69 
  70 void MetaspaceContext::initialize_nonclass_space_context() {
  71   _nonclass_space_context = create_expandable_context("non-class-space", CommitLimiter::globalLimiter());
  72 }
  73 
  74 void MetaspaceContext::print_on(outputStream* st) const {
  75   _vslist->print_on(st);
  76   _cm->print_on(st);
  77 }
  78 
  79 #ifdef ASSERT
  80 void MetaspaceContext::verify() const {
  81   _vslist->verify();
  82   _cm->verify();
  83 }
  84 #endif // ASSERT
  85 
  86 } // namespace metaspace
  87