51 T heap_oop = oopDesc::load_heap_oop(p); 52 assert(!oopDesc::is_null(heap_oop), "expected non-null oop"); 53 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); 54 // If p points to a younger generation, mark the card. 55 if ((HeapWord*)obj < _gen_boundary) { 56 _rs->inline_write_ref_field_gc(p, obj); 57 } 58 } 59 60 template <class T> inline void OopsInGenClosure::par_do_barrier(T* p) { 61 assert(generation()->is_in_reserved(p), "expected ref in generation"); 62 T heap_oop = oopDesc::load_heap_oop(p); 63 assert(!oopDesc::is_null(heap_oop), "expected non-null oop"); 64 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); 65 // If p points to a younger generation, mark the card. 66 if ((HeapWord*)obj < gen_boundary()) { 67 rs()->write_ref_field_gc_par(p, obj); 68 } 69 } 70 71 inline void OopsInKlassOrGenClosure::do_klass_barrier() { 72 assert(_scanned_klass != NULL, "Must be"); 73 _scanned_klass->record_modified_oops(); 74 } 75 76 // NOTE! Any changes made here should also be made 77 // in FastScanClosure::do_oop_work() 78 template <class T> inline void ScanClosure::do_oop_work(T* p) { 79 T heap_oop = oopDesc::load_heap_oop(p); 80 // Should we copy the obj? 81 if (!oopDesc::is_null(heap_oop)) { 82 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); 83 if ((HeapWord*)obj < _boundary) { 84 assert(!_g->to()->is_in_reserved(obj), "Scanning field twice?"); 85 oop new_obj = obj->is_forwarded() ? obj->forwardee() 86 : _g->copy_to_survivor_space(obj); 87 oopDesc::encode_store_heap_oop_not_null(p, new_obj); 88 } 89 90 if (is_scanning_a_klass()) { 91 do_klass_barrier(); 92 } else if (_gc_barrier) { 93 // Now call parent closure 94 do_barrier(p); 95 } 96 } 97 } 98 99 inline void ScanClosure::do_oop_nv(oop* p) { ScanClosure::do_oop_work(p); } 100 inline void ScanClosure::do_oop_nv(narrowOop* p) { ScanClosure::do_oop_work(p); } 101 102 // NOTE! Any changes made here should also be made 103 // in ScanClosure::do_oop_work() 104 template <class T> inline void FastScanClosure::do_oop_work(T* p) { 105 T heap_oop = oopDesc::load_heap_oop(p); 106 // Should we copy the obj? 107 if (!oopDesc::is_null(heap_oop)) { 108 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); 109 if ((HeapWord*)obj < _boundary) { 110 assert(!_g->to()->is_in_reserved(obj), "Scanning field twice?"); 111 oop new_obj = obj->is_forwarded() ? obj->forwardee() 112 : _g->copy_to_survivor_space(obj); 113 oopDesc::encode_store_heap_oop_not_null(p, new_obj); 114 if (is_scanning_a_klass()) { 115 do_klass_barrier(); 116 } else if (_gc_barrier) { 117 // Now call parent closure 118 do_barrier(p); 119 } 120 } 121 } 122 } 123 124 inline void FastScanClosure::do_oop_nv(oop* p) { FastScanClosure::do_oop_work(p); } 125 inline void FastScanClosure::do_oop_nv(narrowOop* p) { FastScanClosure::do_oop_work(p); } 126 127 template <class T> void FilteringClosure::do_oop_work(T* p) { 128 T heap_oop = oopDesc::load_heap_oop(p); 129 if (!oopDesc::is_null(heap_oop)) { 130 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); 131 if ((HeapWord*)obj < _boundary) { 132 _cl->do_oop(p); 133 } 134 } 135 } | 51 T heap_oop = oopDesc::load_heap_oop(p); 52 assert(!oopDesc::is_null(heap_oop), "expected non-null oop"); 53 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); 54 // If p points to a younger generation, mark the card. 55 if ((HeapWord*)obj < _gen_boundary) { 56 _rs->inline_write_ref_field_gc(p, obj); 57 } 58 } 59 60 template <class T> inline void OopsInGenClosure::par_do_barrier(T* p) { 61 assert(generation()->is_in_reserved(p), "expected ref in generation"); 62 T heap_oop = oopDesc::load_heap_oop(p); 63 assert(!oopDesc::is_null(heap_oop), "expected non-null oop"); 64 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); 65 // If p points to a younger generation, mark the card. 66 if ((HeapWord*)obj < gen_boundary()) { 67 rs()->write_ref_field_gc_par(p, obj); 68 } 69 } 70 71 inline void OopsInClassLoaderDataOrGenClosure::do_cld_barrier() { 72 assert(_scanned_cld != NULL, "Must be"); 73 if (!_scanned_cld->has_modified_oops()) { 74 _scanned_cld->record_modified_oops(); 75 } 76 } 77 78 // NOTE! Any changes made here should also be made 79 // in FastScanClosure::do_oop_work() 80 template <class T> inline void ScanClosure::do_oop_work(T* p) { 81 T heap_oop = oopDesc::load_heap_oop(p); 82 // Should we copy the obj? 83 if (!oopDesc::is_null(heap_oop)) { 84 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); 85 if ((HeapWord*)obj < _boundary) { 86 assert(!_g->to()->is_in_reserved(obj), "Scanning field twice?"); 87 oop new_obj = obj->is_forwarded() ? obj->forwardee() 88 : _g->copy_to_survivor_space(obj); 89 oopDesc::encode_store_heap_oop_not_null(p, new_obj); 90 } 91 92 if (is_scanning_a_cld()) { 93 do_cld_barrier(); 94 } else if (_gc_barrier) { 95 // Now call parent closure 96 do_barrier(p); 97 } 98 } 99 } 100 101 inline void ScanClosure::do_oop_nv(oop* p) { ScanClosure::do_oop_work(p); } 102 inline void ScanClosure::do_oop_nv(narrowOop* p) { ScanClosure::do_oop_work(p); } 103 104 // NOTE! Any changes made here should also be made 105 // in ScanClosure::do_oop_work() 106 template <class T> inline void FastScanClosure::do_oop_work(T* p) { 107 T heap_oop = oopDesc::load_heap_oop(p); 108 // Should we copy the obj? 109 if (!oopDesc::is_null(heap_oop)) { 110 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); 111 if ((HeapWord*)obj < _boundary) { 112 assert(!_g->to()->is_in_reserved(obj), "Scanning field twice?"); 113 oop new_obj = obj->is_forwarded() ? obj->forwardee() 114 : _g->copy_to_survivor_space(obj); 115 oopDesc::encode_store_heap_oop_not_null(p, new_obj); 116 if (is_scanning_a_cld()) { 117 do_cld_barrier(); 118 } else if (_gc_barrier) { 119 // Now call parent closure 120 do_barrier(p); 121 } 122 } 123 } 124 } 125 126 inline void FastScanClosure::do_oop_nv(oop* p) { FastScanClosure::do_oop_work(p); } 127 inline void FastScanClosure::do_oop_nv(narrowOop* p) { FastScanClosure::do_oop_work(p); } 128 129 template <class T> void FilteringClosure::do_oop_work(T* p) { 130 T heap_oop = oopDesc::load_heap_oop(p); 131 if (!oopDesc::is_null(heap_oop)) { 132 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); 133 if ((HeapWord*)obj < _boundary) { 134 _cl->do_oop(p); 135 } 136 } 137 } |