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 /*

  * Copyright (c) 2003, 2012, Oracle and/or its affiliates. All rights reserved.

  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

  *

  * This code is free software; you can redistribute it and/or modify it

  * under the terms of the GNU General Public License version 2 only, as

  * published by the Free Software Foundation.

  *

  * This code is distributed in the hope that it will be useful, but WITHOUT

  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

  * version 2 for more details (a copy is included in the LICENSE file that

  * accompanied this code).

  *

  * You should have received a copy of the GNU General Public License version

  * 2 along with this work; if not, write to the Free Software Foundation,

  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

  *

  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

  * or visit www.oracle.com if you need additional information or have any

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  */

 #ifndef SHARE_VM_SERVICES_MEMORYSERVICE_HPP

 #define SHARE_VM_SERVICES_MEMORYSERVICE_HPP

 #include "memory/allocation.hpp"

 #include "memory/generation.hpp"

 #include "runtime/handles.hpp"

 #include "services/memoryUsage.hpp"

 #include "gc_interface/gcCause.hpp"

 // Forward declaration

 class MemoryPool;

 class MemoryManager;

 class GCMemoryManager;

 class CollectedHeap;

 class Generation;

 class DefNewGeneration;

 class PSYoungGen;

 class PSOldGen;

 class CodeHeap;

 class ContiguousSpace;

 class CompactibleFreeListSpace;

 class GenCollectedHeap;

 class ParallelScavengeHeap;

 class G1CollectedHeap;

 // VM Monitoring and Management Support

 class MemoryService : public AllStatic {

 private:

   enum {

     init_pools_list_size = 10,

     init_managers_list_size = 5

   };

   // index for minor and major generations

   enum {

     minor = 0,

     major = 1,

     n_gens = 2

   };

   static GrowableArray<MemoryPool*>*    _pools_list;

   static GrowableArray<MemoryManager*>* _managers_list;

   // memory managers for minor and major GC statistics

   static GCMemoryManager*               _major_gc_manager;

   static GCMemoryManager*               _minor_gc_manager;

   // Code heap memory pool

   static MemoryPool*                    _code_heap_pool;

   static void add_generation_memory_pool(Generation* gen,

                                          MemoryManager* major_mgr,

                                          MemoryManager* minor_mgr);

   static void add_generation_memory_pool(Generation* gen,

                                          MemoryManager* major_mgr) {

     add_generation_memory_pool(gen, major_mgr, NULL);

   }

   static void add_psYoung_memory_pool(PSYoungGen* gen,

                                       MemoryManager* major_mgr,

                                       MemoryManager* minor_mgr);

   static void add_psOld_memory_pool(PSOldGen* gen,

                                     MemoryManager* mgr);

   static void add_g1YoungGen_memory_pool(G1CollectedHeap* g1h,

                                          MemoryManager* major_mgr,

                                          MemoryManager* minor_mgr);

   static void add_g1OldGen_memory_pool(G1CollectedHeap* g1h,

                                        MemoryManager* mgr);

   static MemoryPool* add_space(ContiguousSpace* space,

                                const char* name,

                                bool is_heap,

                                size_t max_size,

                                bool support_usage_threshold);

   static MemoryPool* add_survivor_spaces(DefNewGeneration* gen,

                                          const char* name,

                                          bool is_heap,

                                          size_t max_size,

                                          bool support_usage_threshold);

   static MemoryPool* add_gen(Generation* gen,

                              const char* name,

                              bool is_heap,

                              bool support_usage_threshold);

   static MemoryPool* add_cms_space(CompactibleFreeListSpace* space,

                                    const char* name,

                                    bool is_heap,

                                    size_t max_size,

                                    bool support_usage_threshold);

   static void add_gen_collected_heap_info(GenCollectedHeap* heap);

   static void add_parallel_scavenge_heap_info(ParallelScavengeHeap* heap);

   static void add_g1_heap_info(G1CollectedHeap* g1h);

 public:

   static void set_universe_heap(CollectedHeap* heap);

   static void add_code_heap_memory_pool(CodeHeap* heap);

   static MemoryPool*    get_memory_pool(instanceHandle pool);

   static MemoryManager* get_memory_manager(instanceHandle mgr);

   static const int num_memory_pools() {

     return _pools_list->length();

   }

   static const int num_memory_managers() {

     return _managers_list->length();

   }

   static MemoryPool* get_memory_pool(int index) {

     return _pools_list->at(index);

   }

   static MemoryManager* get_memory_manager(int index) {

     return _managers_list->at(index);

   }

   static void track_memory_usage();

   static void track_code_cache_memory_usage() {

     track_memory_pool_usage(_code_heap_pool);

   }

   static void track_memory_pool_usage(MemoryPool* pool);

   static void gc_begin(bool fullGC, bool recordGCBeginTime,

                        bool recordAccumulatedGCTime,

                        bool recordPreGCUsage, bool recordPeakUsage);

   static void gc_end(bool fullGC, bool recordPostGCUsage,

                      bool recordAccumulatedGCTime,

                      bool recordGCEndTime, bool countCollection,

                      GCCause::Cause cause);

   static void oops_do(OopClosure* f);

   static bool get_verbose() { return PrintGC; }

   static bool set_verbose(bool verbose);

   // Create an instance of java/lang/management/MemoryUsage

   static Handle create_MemoryUsage_obj(MemoryUsage usage, TRAPS);

   static const GCMemoryManager* get_minor_gc_manager() {

       return _minor_gc_manager;

   }

   static const GCMemoryManager* get_major_gc_manager() {

       return _major_gc_manager;

   }

 };

 class TraceMemoryManagerStats : public StackObj {

 private:

   bool         _fullGC;

   bool         _recordGCBeginTime;

   bool         _recordPreGCUsage;

   bool         _recordPeakUsage;

   bool         _recordPostGCUsage;

   bool         _recordAccumulatedGCTime;

   bool         _recordGCEndTime;

   bool         _countCollection;

   GCCause::Cause _cause;

 public:

   TraceMemoryManagerStats() {}

   TraceMemoryManagerStats(bool fullGC,

                           GCCause::Cause cause,

                           bool recordGCBeginTime = true,

                           bool recordPreGCUsage = true,

                           bool recordPeakUsage = true,

                           bool recordPostGCUsage = true,

                           bool recordAccumulatedGCTime = true,

                           bool recordGCEndTime = true,

                           bool countCollection = true);

   void initialize(bool fullGC,

                   GCCause::Cause cause,

                   bool recordGCBeginTime,

                   bool recordPreGCUsage,

                   bool recordPeakUsage,

                   bool recordPostGCUsage,

                   bool recordAccumulatedGCTime,

                   bool recordGCEndTime,

                   bool countCollection);

   TraceMemoryManagerStats(Generation::Name kind, GCCause::Cause cause);

   ~TraceMemoryManagerStats();

 };

 #endif // SHARE_VM_SERVICES_MEMORYSERVICE_HPP