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src/hotspot/share/gc/shared/genOopClosures.hpp

8199604_cardtablemodrefbs_rename

13  *                                                                                                                                   
14  * You should have received a copy of the GNU General Public License version                                                         
15  * 2 along with this work; if not, write to the Free Software Foundation,                                                            
16  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.                                                                     
17  *                                                                                                                                   
18  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA                                                           
19  * or visit www.oracle.com if you need additional information or have any                                                            
20  * questions.                                                                                                                        
21  *                                                                                                                                   
22  */                                                                                                                                  
23 
24 #ifndef SHARE_VM_GC_SHARED_GENOOPCLOSURES_HPP                                                                                        
25 #define SHARE_VM_GC_SHARED_GENOOPCLOSURES_HPP                                                                                        
26 
27 #include "memory/iterator.hpp"                                                                                                       
28 #include "oops/oop.hpp"                                                                                                              
29 
30 class Generation;                                                                                                                    
31 class HeapWord;                                                                                                                      
32 class CardTableRS;                                                                                                                   
33 class CardTableModRefBS;                                                                                                             
34 class DefNewGeneration;                                                                                                              
35 class KlassRemSet;                                                                                                                   
36 
37 // Closure for iterating roots from a particular generation                                                                          
38 // Note: all classes deriving from this MUST call this do_barrier                                                                    
39 // method at the end of their own do_oop method!                                                                                     
40 // Note: no do_oop defined, this is an abstract class.                                                                               
41 
42 class OopsInGenClosure : public ExtendedOopClosure {                                                                                 
43  private:                                                                                                                            
44   Generation*  _orig_gen;     // generation originally set in ctor                                                                   
45   Generation*  _gen;          // generation being scanned                                                                            
46 
47  protected:                                                                                                                          
48   // Some subtypes need access.                                                                                                      
49   HeapWord*    _gen_boundary; // start of generation                                                                                 
50   CardTableRS* _rs;           // remembered set                                                                                      
51 
52   // For assertions                                                                                                                  

13  *
14  * You should have received a copy of the GNU General Public License version
15  * 2 along with this work; if not, write to the Free Software Foundation,
16  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
17  *
18  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
19  * or visit www.oracle.com if you need additional information or have any
20  * questions.
21  *
22  */
23 
24 #ifndef SHARE_VM_GC_SHARED_GENOOPCLOSURES_HPP
25 #define SHARE_VM_GC_SHARED_GENOOPCLOSURES_HPP
26 
27 #include "memory/iterator.hpp"
28 #include "oops/oop.hpp"
29 
30 class Generation;
31 class HeapWord;
32 class CardTableRS;
33 class CardTableBarrierSet;
34 class DefNewGeneration;
35 class KlassRemSet;
36 
37 // Closure for iterating roots from a particular generation
38 // Note: all classes deriving from this MUST call this do_barrier
39 // method at the end of their own do_oop method!
40 // Note: no do_oop defined, this is an abstract class.
41 
42 class OopsInGenClosure : public ExtendedOopClosure {
43  private:
44   Generation*  _orig_gen;     // generation originally set in ctor
45   Generation*  _gen;          // generation being scanned
46 
47  protected:
48   // Some subtypes need access.
49   HeapWord*    _gen_boundary; // start of generation
50   CardTableRS* _rs;           // remembered set
51 
52   // For assertions
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