1 /*
   2  * Copyright (c) 2015, 2019, 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_ZPAGE_HPP
  25 #define SHARE_GC_Z_ZPAGE_HPP
  26 
  27 #include "gc/z/zList.hpp"
  28 #include "gc/z/zLiveMap.hpp"
  29 #include "gc/z/zPhysicalMemory.hpp"
  30 #include "gc/z/zVirtualMemory.hpp"
  31 #include "memory/allocation.hpp"
  32 
  33 class ZPage : public CHeapObj<mtGC> {
  34   friend class VMStructs;
  35   friend class ZList<ZPage>;
  36 
  37 private:
  38   uint8_t            _type;
  39   uint8_t            _numa_id;
  40   uint32_t           _seqnum;
  41   ZVirtualMemory     _virtual;
  42   volatile uintptr_t _top;
  43   ZLiveMap           _livemap;
  44   uint64_t           _last_used;
  45   ZPhysicalMemory    _physical;
  46   ZListNode<ZPage>   _node;
  47 
  48   void assert_initialized() const;
  49 
  50   uint8_t type_from_size(size_t size) const;
  51   const char* type_to_string() const;
  52 
  53   bool is_object_marked(uintptr_t addr) const;
  54   bool is_object_strongly_marked(uintptr_t addr) const;
  55 
  56 public:
  57   ZPage(const ZVirtualMemory& vmem, const ZPhysicalMemory& pmem);
  58   ZPage(uint8_t type, const ZVirtualMemory& vmem, const ZPhysicalMemory& pmem);
  59 
  60   uint32_t object_max_count() const;
  61   size_t object_alignment_shift() const;
  62   size_t object_alignment() const;
  63 
  64   uint8_t type() const;
  65   uintptr_t start() const;
  66   uintptr_t end() const;
  67   size_t size() const;
  68   uintptr_t top() const;
  69   size_t remaining() const;
  70 
  71   const ZPhysicalMemory& physical_memory() const;
  72   const ZVirtualMemory& virtual_memory() const;
  73 
  74   uint8_t numa_id();
  75 
  76   bool is_allocating() const;
  77   void pin_allocating();
  78   void unpin_allocating();
  79 
  80   bool is_relocatable() const;
  81 
  82   bool is_mapped() const;
  83   void set_pre_mapped();
  84 
  85   uint64_t last_used() const;
  86   void set_last_used();
  87 
  88   void reset();
  89 
  90   ZPage* retype(uint8_t type);
  91   ZPage* split(size_t size);
  92   ZPage* split(uint8_t type, size_t size);
  93 
  94   bool is_in(uintptr_t addr) const;
  95 
  96   uintptr_t block_start(uintptr_t addr) const;
  97   bool block_is_obj(uintptr_t addr) const;
  98 
  99   bool is_marked() const;
 100   bool is_object_live(uintptr_t addr) const;
 101   bool is_object_strongly_live(uintptr_t addr) const;
 102   bool mark_object(uintptr_t addr, bool finalizable, bool& inc_live);
 103 
 104   void inc_live_atomic(uint32_t objects, size_t bytes);
 105   uint32_t live_objects() const;
 106   size_t live_bytes() const;
 107 
 108   void object_iterate(ObjectClosure* cl);
 109 
 110   uintptr_t alloc_object(size_t size);
 111   uintptr_t alloc_object_atomic(size_t size);
 112 
 113   bool undo_alloc_object(uintptr_t addr, size_t size);
 114   bool undo_alloc_object_atomic(uintptr_t addr, size_t size);
 115 
 116   void print_on(outputStream* out) const;
 117   void print() const;
 118 };
 119 
 120 #endif // SHARE_GC_Z_ZPAGE_HPP