1 /*
   2  * Copyright (c) 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  *
  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   CollectedHeap* heap = Universe::heap();
  35   assert(heap != NULL, "Uninitialized access to SerialHeap::heap()");
  36   assert(heap->kind() == CollectedHeap::Serial, "Invalid name");
  37   return static_cast<SerialHeap*>(heap);
  38 }
  39 
  40 SerialHeap::SerialHeap() :
  41     GenCollectedHeap(Generation::DefNew,
  42                      Generation::MarkSweepCompact,
  43                      "Copy:MSC"),
  44     _eden_pool(NULL),
  45     _survivor_pool(NULL),
  46     _old_pool(NULL) {
  47   _young_manager = new GCMemoryManager("Copy", "end of minor GC");
  48   _old_manager = new GCMemoryManager("MarkSweepCompact", "end of major GC");
  49 }
  50 
  51 void SerialHeap::initialize_serviceability() {
  52 
  53   DefNewGeneration* young = young_gen();
  54 
  55   // Add a memory pool for each space and young gen doesn't
  56   // support low memory detection as it is expected to get filled up.
  57   _eden_pool = new ContiguousSpacePool(young->eden(),
  58                                        "Eden Space",
  59                                        young->max_eden_size(),
  60                                        false /* support_usage_threshold */);
  61   _survivor_pool = new SurvivorContiguousSpacePool(young,
  62                                                    "Survivor Space",
  63                                                    young->max_survivor_size(),
  64                                                    false /* support_usage_threshold */);
  65   TenuredGeneration* old = old_gen();
  66   _old_pool = new GenerationPool(old, "Tenured Gen", true);
  67 
  68   _young_manager->add_pool(_eden_pool);
  69   _young_manager->add_pool(_survivor_pool);
  70   young->set_gc_manager(_young_manager);
  71 
  72   _old_manager->add_pool(_eden_pool);
  73   _old_manager->add_pool(_survivor_pool);
  74   _old_manager->add_pool(_old_pool);
  75   old->set_gc_manager(_old_manager);
  76 
  77 }
  78 
  79 GrowableArray<GCMemoryManager*> SerialHeap::memory_managers() {
  80   GrowableArray<GCMemoryManager*> memory_managers(2);
  81   memory_managers.append(_young_manager);
  82   memory_managers.append(_old_manager);
  83   return memory_managers;
  84 }
  85 
  86 GrowableArray<MemoryPool*> SerialHeap::memory_pools() {
  87   GrowableArray<MemoryPool*> memory_pools(3);
  88   memory_pools.append(_eden_pool);
  89   memory_pools.append(_survivor_pool);
  90   memory_pools.append(_old_pool);
  91   return memory_pools;
  92 }