1 /*
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  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
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 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
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 24 
 25 #ifndef SHARE_GC_G1_G1FULLGCOOPCLOSURES_HPP
 26 #define SHARE_GC_G1_G1FULLGCOOPCLOSURES_HPP
 27 
 28 #include "gc/g1/g1CollectedHeap.hpp"
 29 #include "gc/shared/verifyOption.hpp"
 30 #include "memory/iterator.hpp"
 31 
 32 class G1CollectedHeap;
 33 class G1FullCollector;
 34 class G1CMBitMap;
 35 class G1FullGCMarker;
 36 class SlidingForwarding;
 37 
 38 // Below are closures used by the G1 Full GC.
 39 class G1IsAliveClosure : public BoolObjectClosure {
 40   G1FullCollector* _collector;
 41   G1CMBitMap* _bitmap;
 42 
 43 public:
 44   G1IsAliveClosure(G1FullCollector* collector);
 45   G1IsAliveClosure(G1FullCollector* collector, G1CMBitMap* bitmap) :
 46     _collector(collector), _bitmap(bitmap) { }
 47 
 48   virtual bool do_object_b(oop p);
 49 };
 50 
 51 class G1FullKeepAliveClosure: public OopClosure {
 52   G1FullGCMarker* _marker;
 53   template <class T>
 54   inline void do_oop_work(T* p);
 55 
 56 public:
 57   G1FullKeepAliveClosure(G1FullGCMarker* pm) : _marker(pm) { }
 58 
 59   virtual void do_oop(oop* p);
 60   virtual void do_oop(narrowOop* p);
 61 };
 62 
 63 class G1MarkAndPushClosure : public OopIterateClosure {
 64   G1FullGCMarker* _marker;
 65   uint _worker_id;
 66 
 67 public:
 68   G1MarkAndPushClosure(uint worker, G1FullGCMarker* marker, ReferenceDiscoverer* ref) :
 69     OopIterateClosure(ref),
 70     _marker(marker),
 71     _worker_id(worker) { }
 72 
 73   template <class T> inline void do_oop_work(T* p);
 74   virtual void do_oop(oop* p);
 75   virtual void do_oop(narrowOop* p);
 76 
 77   virtual bool do_metadata();
 78   virtual void do_klass(Klass* k);
 79   virtual void do_cld(ClassLoaderData* cld);
 80 };
 81 
 82 class G1AdjustClosure : public BasicOopIterateClosure {
 83   G1FullCollector* _collector;
 84   const SlidingForwarding* const _forwarding;
 85 
 86   template <class T> inline void adjust_pointer(T* p);
 87 public:
 88   G1AdjustClosure(G1FullCollector* collector) :
 89     _collector(collector),
 90     _forwarding(G1CollectedHeap::heap()->forwarding()) { }
 91   template <class T> void do_oop_work(T* p) { adjust_pointer(p); }
 92   virtual void do_oop(oop* p);
 93   virtual void do_oop(narrowOop* p);
 94 
 95   virtual ReferenceIterationMode reference_iteration_mode() { return DO_FIELDS; }
 96 };
 97 
 98 class G1VerifyOopClosure: public BasicOopIterateClosure {
 99 private:
100   G1CollectedHeap* _g1h;
101   bool             _failures;
102   oop              _containing_obj;
103   VerifyOption     _verify_option;
104 
105 public:
106   int _cc;
107   G1VerifyOopClosure(VerifyOption option);
108 
109   void set_containing_obj(oop obj) {
110     _containing_obj = obj;
111   }
112 
113   bool failures() { return _failures; }
114   void print_object(outputStream* out, oop obj);
115 
116   template <class T> void do_oop_work(T* p);
117 
118   void do_oop(oop* p)       { do_oop_work(p); }
119   void do_oop(narrowOop* p) { do_oop_work(p); }
120 };
121 
122 class G1FollowStackClosure: public VoidClosure {
123   G1FullGCMarker* _marker;
124 
125 public:
126   G1FollowStackClosure(G1FullGCMarker* marker) : _marker(marker) {}
127   virtual void do_void();
128 };
129 
130 #endif // SHARE_GC_G1_G1FULLGCOOPCLOSURES_HPP
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