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.hpp"
  27 #include "gc/serial/serialHeap.hpp"
  28 #include "services/memoryManager.hpp"
  29 #include "services/memoryPool.hpp"
  30 
  31 SerialHeap::SerialHeap(GenCollectorPolicy* policy) : GenCollectedHeap(policy) {}
  32 
  33 void SerialHeap::check_gen_kinds() {
  34   assert(young_gen()->kind() == Generation::DefNew,
  35          "Wrong youngest generation type");
  36   assert(old_gen()->kind() == Generation::MarkSweepCompact,
  37          "Wrong generation kind");
  38 }
  39 
  40 class CopyMemoryManager : public GCMemoryManager {
  41 private:
  42 public:
  43   CopyMemoryManager() : GCMemoryManager() {}
  44 
  45   const char* name() { return "Copy"; }
  46   virtual const char* gc_end_message() { return "end of minor GC"; }
  47 };
  48 
  49 class MSCMemoryManager : public GCMemoryManager {
  50 private:
  51 public:
  52   MSCMemoryManager() : GCMemoryManager() {}
  53 
  54   const char* name() { return "MarkSweepCompact"; }
  55   virtual const char* gc_end_message() { return "end of major GC"; }
  56 };
  57 
  58 void SerialHeap::init_memory_managers() {
  59   _minor_mgr = new CopyMemoryManager();
  60   _major_mgr = new MSCMemoryManager();
  61 }
  62 
  63 GrowableArray<MemoryManager*> SerialHeap::memory_managers() {
  64   GrowableArray<MemoryManager*> mem_mgrs;
  65   mem_mgrs.append(_minor_mgr);
  66   mem_mgrs.append(_major_mgr);
  67   return mem_mgrs;
  68 }
  69 
  70 GrowableArray<MemoryPool*> SerialHeap::memory_pools() {
  71   DefNewGeneration* young = (DefNewGeneration*) young_gen();
  72 
  73   // Add a memory pool for each space and young gen doesn't
  74   // support low memory detection as it is expected to get filled up.
  75   MemoryPool* eden = new ContiguousSpacePool(young->eden(),
  76                                              "Eden Space",
  77                                              MemoryPool::Heap,
  78                                              young->max_eden_size(),
  79                                              false /* support_usage_threshold */);
  80   MemoryPool* survivor = new SurvivorContiguousSpacePool(young,
  81                                                          "Survivor Space",
  82                                                          MemoryPool::Heap,
  83                                                          young->max_survivor_size(),
  84                                                          false /* support_usage_threshold */);
  85   GenerationPool* old = new GenerationPool(old_gen(), "Tenured Gen", MemoryPool::Heap, true);
  86 
  87   GrowableArray<MemoryPool*> mem_pools;
  88   mem_pools.append(eden);
  89   mem_pools.append(survivor);
  90   mem_pools.append(old);
  91 
  92   _minor_mgr->add_pool(eden);
  93   _minor_mgr->add_pool(survivor);
  94 
  95   _major_mgr->add_pool(eden);
  96   _major_mgr->add_pool(survivor);
  97   _major_mgr->add_pool(old);
  98 
  99   return mem_pools;
 100 }