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/chunkManager.hpp"
  29 #include "memory/metaspace/metaspaceContext.hpp"
  30 #include "memory/metaspace/virtualSpaceList.hpp"
  31 #include "utilities/debug.hpp"
  32 #include "utilities/globalDefinitions.hpp"
  33 #include "utilities/ostream.hpp"
  34 
  35 
  36 namespace metaspace {
  37 
  38 #define LOGFMT         "SpcMgr @" PTR_FORMAT " (%s)"
  39 #define LOGFMT_ARGS    p2i(this), this->_name
  40 
  41 
  42 MetaspaceContext* MetaspaceContext::_class_space_context = NULL;
  43 MetaspaceContext* MetaspaceContext::_nonclass_space_context = NULL;
  44 
  45 // Destroys the context: deletes chunkmanager and virtualspacelist.
  46 // If this is a non-expandable context over an existing space, that space remains
  47 // untouched, otherwise all memory is unmapped.
  48 MetaspaceContext::~MetaspaceContext() {
  49   delete _cm;
  50   delete _vslist;
  51 }
  52 
  53 // Create a new, empty, expandable metaspace context.
  54 MetaspaceContext* MetaspaceContext::create_expandable_context(const char* name, CommitLimiter* commit_limiter) {
  55   VirtualSpaceList* vsl = new VirtualSpaceList(name, commit_limiter);
  56   ChunkManager* cm = new ChunkManager(name, vsl);
  57   return new MetaspaceContext(name, vsl, cm);
  58 }
  59 
  60 // Create a new, empty, non-expandable metaspace context atop of an externally provided space.
  61 MetaspaceContext* MetaspaceContext::create_nonexpandable_context(const char* name, ReservedSpace rs, CommitLimiter* commit_limiter) {
  62   VirtualSpaceList* vsl = new VirtualSpaceList(name, rs, commit_limiter);
  63   ChunkManager* cm = new ChunkManager(name, vsl);
  64   return new MetaspaceContext(name, vsl, cm);
  65 }
  66 
  67 
  68 void MetaspaceContext::initialize_class_space_context(ReservedSpace rs) {
  69   _class_space_context = create_nonexpandable_context("class-space", rs, CommitLimiter::globalLimiter());
  70 }
  71 
  72 void MetaspaceContext::initialize_nonclass_space_context() {
  73   _nonclass_space_context = create_expandable_context("non-class-space", CommitLimiter::globalLimiter());
  74 }
  75 
  76 void MetaspaceContext::print_on(outputStream* st) const {
  77   _vslist->print_on(st);
  78   _cm->print_on(st);
  79 }
  80 
  81 #ifdef ASSERT
  82 void MetaspaceContext::verify(bool slow) const {
  83   _vslist->verify(slow);
  84   _cm->verify(slow);
  85 }
  86 #endif // ASSERT
  87 
  88 } // namespace metaspace
  89