1 /*
   2  * Copyright (c) 2015, 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 #ifndef SHARE_GC_Z_ZCOLLECTEDHEAP_HPP
  25 #define SHARE_GC_Z_ZCOLLECTEDHEAP_HPP
  26 
  27 #include "gc/shared/collectedHeap.hpp"
  28 #include "gc/z/zBarrierSet.hpp"
  29 #include "gc/z/zCollectorPolicy.hpp"
  30 #include "gc/z/zDirector.hpp"
  31 #include "gc/z/zDriver.hpp"
  32 #include "gc/z/zHeap.hpp"
  33 #include "gc/z/zStat.hpp"
  34 
  35 class ZCollectedHeap : public CollectedHeap {
  36   friend class VMStructs;
  37 
  38 private:
  39   ZCollectorPolicy* _policy;
  40   ZBarrierSet       _barrier;
  41   ZHeap             _heap;
  42   ZDirector*        _director;
  43   ZDriver*          _driver;
  44   ZStat*            _stat;
  45 
  46   virtual HeapWord* allocate_new_tlab(size_t word_size);
  47 
  48 public:
  49   static ZCollectedHeap* heap();
  50 
  51   using CollectedHeap::ensure_parsability;
  52   using CollectedHeap::accumulate_statistics_all_tlabs;
  53   using CollectedHeap::resize_all_tlabs;
  54 
  55   ZCollectedHeap(ZCollectorPolicy* policy);
  56   virtual Name kind() const;
  57   virtual const char* name() const;
  58   virtual jint initialize();
  59   virtual void initialize_serviceability();
  60   virtual void stop();
  61 
  62   virtual CollectorPolicy* collector_policy() const;
  63   virtual AdaptiveSizePolicy* size_policy();
  64 
  65   virtual size_t max_capacity() const;
  66   virtual size_t capacity() const;
  67   virtual size_t used() const;
  68 
  69   virtual bool is_maximal_no_gc() const;
  70   virtual bool is_scavengable(oop obj);
  71   virtual bool is_in(const void* p) const;
  72   virtual bool is_in_closed_subset(const void* p) const;
  73 
  74   virtual HeapWord* mem_allocate(size_t size, bool* gc_overhead_limit_was_exceeded);
  75   virtual void collect(GCCause::Cause cause);
  76   virtual void collect_as_vm_thread(GCCause::Cause cause);
  77   virtual void do_full_collection(bool clear_all_soft_refs);
  78 
  79   virtual bool supports_tlab_allocation() const;
  80   virtual size_t tlab_capacity(Thread* thr) const;
  81   virtual size_t tlab_used(Thread* thr) const;
  82   virtual size_t max_tlab_size() const;
  83   virtual size_t unsafe_max_tlab_alloc(Thread* thr) const;
  84 
  85   virtual bool can_elide_tlab_store_barriers() const;
  86   virtual bool can_elide_initializing_store_barrier(oop new_obj);
  87   virtual bool card_mark_must_follow_store() const;
  88 
  89   virtual GrowableArray<GCMemoryManager*> memory_managers();
  90   virtual GrowableArray<MemoryPool*> memory_pools();
  91 
  92   virtual void object_iterate(ObjectClosure* cl);
  93   virtual void safe_object_iterate(ObjectClosure* cl);
  94 
  95   virtual HeapWord* block_start(const void* addr) const;
  96   virtual size_t block_size(const HeapWord* addr) const;
  97   virtual bool block_is_obj(const HeapWord* addr) const;
  98 
  99   virtual void register_nmethod(nmethod* nm);
 100   virtual void unregister_nmethod(nmethod* nm);
 101   virtual void verify_nmethod(nmethod* nmethod);
 102 
 103   virtual jlong millis_since_last_gc();
 104 
 105   virtual void gc_threads_do(ThreadClosure* tc) const;
 106 
 107   virtual VirtualSpaceSummary create_heap_space_summary();
 108 
 109   virtual void print_on(outputStream* st) const;
 110   virtual void print_on_error(outputStream* st) const;
 111   virtual void print_extended_on(outputStream* st) const;
 112   virtual void print_gc_threads_on(outputStream* st) const;
 113   virtual void print_tracing_info() const;
 114 
 115   virtual void prepare_for_verify();
 116   virtual void verify(VerifyOption option /* ignored */);
 117   virtual bool is_oop(oop object) const;
 118 };
 119 
 120 #endif // SHARE_GC_Z_ZCOLLECTEDHEAP_HPP