1 /*
   2  * Copyright (c) 2017, 2020, 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 #include "precompiled.hpp"
  26 #include "gc/serial/defNewGeneration.inline.hpp"
  27 #include "gc/serial/serialHeap.hpp"
  28 #include "gc/serial/tenuredGeneration.inline.hpp"
  29 #include "gc/shared/genMemoryPools.hpp"
  30 #include "memory/universe.hpp"
  31 #include "services/memoryManager.hpp"
  32 
  33 SerialHeap* SerialHeap::heap() {
  34   return named_heap<SerialHeap>(CollectedHeap::Serial);
  35 }
  36 
  37 SerialHeap::SerialHeap() :
  38     GenCollectedHeap(Generation::DefNew,
  39                      Generation::MarkSweepCompact,
  40                      "Copy:MSC"),
  41     _eden_pool(NULL),
  42     _survivor_pool(NULL),
  43     _old_pool(NULL) {
  44   _young_manager = new GCMemoryManager("Copy", "end of minor GC");
  45   _old_manager = new GCMemoryManager("MarkSweepCompact", "end of major GC");
  46 }
  47 
  48 void SerialHeap::initialize_serviceability() {
  49 
  50   DefNewGeneration* young = young_gen();
  51 
  52   // Add a memory pool for each space and young gen doesn't
  53   // support low memory detection as it is expected to get filled up.
  54   _eden_pool = new ContiguousSpacePool(young->eden(),
  55                                        "Eden Space",
  56                                        young->max_eden_size(),
  57                                        false /* support_usage_threshold */);
  58   _survivor_pool = new SurvivorContiguousSpacePool(young,
  59                                                    "Survivor Space",
  60                                                    young->max_survivor_size(),
  61                                                    false /* support_usage_threshold */);
  62   TenuredGeneration* old = old_gen();
  63   _old_pool = new GenerationPool(old, "Tenured Gen", true);
  64 
  65   _young_manager->add_pool(_eden_pool);
  66   _young_manager->add_pool(_survivor_pool);
  67   young->set_gc_manager(_young_manager);
  68 
  69   _old_manager->add_pool(_eden_pool);
  70   _old_manager->add_pool(_survivor_pool);
  71   _old_manager->add_pool(_old_pool);
  72   old->set_gc_manager(_old_manager);
  73 
  74 }
  75 
  76 GrowableArray<GCMemoryManager*> SerialHeap::memory_managers() {
  77   GrowableArray<GCMemoryManager*> memory_managers(2);
  78   memory_managers.append(_young_manager);
  79   memory_managers.append(_old_manager);
  80   return memory_managers;
  81 }
  82 
  83 GrowableArray<MemoryPool*> SerialHeap::memory_pools() {
  84   GrowableArray<MemoryPool*> memory_pools(3);
  85   memory_pools.append(_eden_pool);
  86   memory_pools.append(_survivor_pool);
  87   memory_pools.append(_old_pool);
  88   return memory_pools;
  89 }