1 /*

     2  * Copyright (c) 2015, 2018, 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 #ifndef SHARE_GC_Z_ZCOLLECTEDHEAP_HPP

    25 #define SHARE_GC_Z_ZCOLLECTEDHEAP_HPP

    26 

    27 #include "gc/shared/collectedHeap.hpp"

    28 #include "gc/shared/softRefPolicy.hpp"

    29 #include "gc/z/zBarrierSet.hpp"

    30 #include "gc/z/zCollectorPolicy.hpp"

    31 #include "gc/z/zDirector.hpp"

    32 #include "gc/z/zDriver.hpp"

    33 #include "gc/z/zInitialize.hpp"

    34 #include "gc/z/zHeap.hpp"

    35 #include "gc/z/zRuntimeWorkers.hpp"

    36 #include "gc/z/zStat.hpp"

    37 

    38 class ZCollectedHeap : public CollectedHeap {

    39   friend class VMStructs;

    40 

    41 private:

    42   ZCollectorPolicy* _collector_policy;

    43   SoftRefPolicy     _soft_ref_policy;

    44   ZBarrierSet       _barrier_set;

    45   ZInitialize       _initialize;

    46   ZHeap             _heap;

    47   ZDirector*        _director;

    48   ZDriver*          _driver;

    49   ZStat*            _stat;

    50   ZRuntimeWorkers   _runtime_workers;

    51 

    52   virtual HeapWord* allocate_new_tlab(size_t min_size,

    53                                       size_t requested_size,

    54                                       size_t* actual_size);

    55 

    56 public:

    57   static ZCollectedHeap* heap();

    58 

    59   using CollectedHeap::ensure_parsability;

    60   using CollectedHeap::accumulate_statistics_all_tlabs;

    61   using CollectedHeap::resize_all_tlabs;

    62 

    63   ZCollectedHeap(ZCollectorPolicy* policy);

    64   virtual Name kind() const;

    65   virtual const char* name() const;

    66   virtual jint initialize();

    67   virtual void initialize_serviceability();

    68   virtual void stop();

    69 

    70   virtual CollectorPolicy* collector_policy() const;

    71   virtual SoftRefPolicy* soft_ref_policy();

    72 

    73   virtual size_t max_capacity() const;

    74   virtual size_t capacity() const;

    75   virtual size_t used() const;

    76 

    77   virtual bool is_maximal_no_gc() const;

    78   virtual bool is_scavengable(oop obj);

    79   virtual bool is_in(const void* p) const;

    80   virtual bool is_in_closed_subset(const void* p) const;

    81 

    82   virtual HeapWord* mem_allocate(size_t size, bool* gc_overhead_limit_was_exceeded);

    83   virtual MetaWord* satisfy_failed_metadata_allocation(ClassLoaderData* loader_data,

    84                                                        size_t size,

    85                                                        Metaspace::MetadataType mdtype);

    86   virtual void collect(GCCause::Cause cause);

    87   virtual void collect_as_vm_thread(GCCause::Cause cause);

    88   virtual void do_full_collection(bool clear_all_soft_refs);

    89 

    90   virtual bool supports_tlab_allocation() const;

    91   virtual size_t tlab_capacity(Thread* thr) const;

    92   virtual size_t tlab_used(Thread* thr) const;

    93   virtual size_t max_tlab_size() const;

    94   virtual size_t unsafe_max_tlab_alloc(Thread* thr) const;

    95 

    96   virtual bool can_elide_tlab_store_barriers() const;

    97   virtual bool can_elide_initializing_store_barrier(oop new_obj);

    98   virtual bool card_mark_must_follow_store() const;

    99 

   100   virtual GrowableArray<GCMemoryManager*> memory_managers();

   101   virtual GrowableArray<MemoryPool*> memory_pools();

   102 

   103   virtual void object_iterate(ObjectClosure* cl);

   104   virtual void safe_object_iterate(ObjectClosure* cl);

   105 

   106   virtual HeapWord* block_start(const void* addr) const;

   107   virtual size_t block_size(const HeapWord* addr) const;

   108   virtual bool block_is_obj(const HeapWord* addr) const;

   109 

   110   virtual void register_nmethod(nmethod* nm);

   111   virtual void unregister_nmethod(nmethod* nm);

   112   virtual void verify_nmethod(nmethod* nmethod);

   113 

   114   virtual WorkGang* get_safepoint_workers();

   115 

   116   virtual jlong millis_since_last_gc();

   117 

   118   virtual void gc_threads_do(ThreadClosure* tc) const;

   119 

   120   virtual VirtualSpaceSummary create_heap_space_summary();

   121 

   122   virtual void print_on(outputStream* st) const;

   123   virtual void print_on_error(outputStream* st) const;

   124   virtual void print_extended_on(outputStream* st) const;

   125   virtual void print_gc_threads_on(outputStream* st) const;

   126   virtual void print_tracing_info() const;

   127 

   128   virtual void prepare_for_verify();

   129   virtual void verify(VerifyOption option /* ignored */);

   130   virtual bool is_oop(oop object) const;

   131 };

   132 

   133 #endif // SHARE_GC_Z_ZCOLLECTEDHEAP_HPP