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 #ifndef SHARE_GC_G1_G1FULLGCMARKER_HPP
  26 #define SHARE_GC_G1_G1FULLGCMARKER_HPP
  27 
  28 #include "gc/g1/g1FullGCOopClosures.hpp"
  29 #include "gc/shared/preservedMarks.hpp"
  30 #include "gc/shared/taskqueue.hpp"
  31 #include "memory/iterator.hpp"
  32 #include "oops/markOop.hpp"
  33 #include "oops/oop.hpp"
  34 #include "runtime/timer.hpp"
  35 #include "utilities/chunkedList.hpp"
  36 #include "utilities/growableArray.hpp"
  37 #include "utilities/stack.hpp"
  38 
  39 typedef OverflowTaskQueue<oop, mtGC>                 OopQueue;
  40 typedef OverflowTaskQueue<ObjArrayTask, mtGC>        ObjArrayTaskQueue;
  41 
  42 typedef GenericTaskQueueSet<OopQueue, mtGC>          OopQueueSet;
  43 typedef GenericTaskQueueSet<ObjArrayTaskQueue, mtGC> ObjArrayTaskQueueSet;
  44 
  45 class G1CMBitMap;
  46 
  47 class G1FullGCMarker : public CHeapObj<mtGC> {
  48   uint               _worker_id;
  49   // Backing mark bitmap
  50   G1CMBitMap*        _bitmap;
  51 
  52   // Mark stack
  53   OopQueue           _oop_stack;
  54   ObjArrayTaskQueue  _objarray_stack;
  55   PreservedMarks*    _preserved_stack;
  56 
  57   // Marking closures
  58   G1MarkAndPushClosure _mark_closure;
  59   G1VerifyOopClosure   _verify_closure;
  60   G1FollowStackClosure _stack_closure;
  61   CLDToOopClosure      _cld_closure;
  62 
  63   inline bool is_empty();
  64   inline bool pop_object(oop& obj);
  65   inline bool pop_objarray(ObjArrayTask& array);
  66   inline void push_objarray(oop obj, size_t index);
  67   inline bool mark_object(oop obj);
  68 
  69   // Marking helpers
  70   inline void follow_object(oop obj);
  71   inline void follow_array(objArrayOop array);
  72   inline void follow_array_chunk(objArrayOop array, int index);
  73 public:
  74   G1FullGCMarker(uint worker_id, PreservedMarks* preserved_stack, G1CMBitMap* bitmap);
  75   ~G1FullGCMarker();
  76 
  77   // Stack getters
  78   OopQueue*          oop_stack()       { return &_oop_stack; }
  79   ObjArrayTaskQueue* objarray_stack()  { return &_objarray_stack; }
  80   PreservedMarks*    preserved_stack() { return _preserved_stack; }
  81 
  82   // Marking entry points
  83   template <class T> inline void mark_and_push(T* p);
  84   inline void follow_klass(Klass* k);
  85   inline void follow_cld(ClassLoaderData* cld);
  86 
  87   inline void drain_stack();
  88   void complete_marking(OopQueueSet* oop_stacks,
  89                         ObjArrayTaskQueueSet* array_stacks,
  90                         ParallelTaskTerminator* terminator);
  91 
  92   // Closure getters
  93   CLDToOopClosure*      cld_closure()   { return &_cld_closure; }
  94   G1MarkAndPushClosure* mark_closure()  { return &_mark_closure; }
  95   G1FollowStackClosure* stack_closure() { return &_stack_closure; }
  96 };
  97 
  98 #endif // SHARE_GC_G1_G1FULLGCMARKER_HPP