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_VM_GC_IMPLEMENTATION_SHARED_MARKSWEEP_INLINE_HPP 26 #define SHARE_VM_GC_IMPLEMENTATION_SHARED_MARKSWEEP_INLINE_HPP 27 28 #include "gc_implementation/shared/markSweep.hpp" 29 #include "gc_interface/collectedHeap.hpp" 30 #include "oops/markOop.inline.hpp" 31 #include "utilities/stack.inline.hpp" 32 #include "utilities/macros.hpp" 33 #if INCLUDE_ALL_GCS 34 #include "gc_implementation/g1/g1StringDedup.hpp" 35 #include "gc_implementation/parallelScavenge/psParallelCompact.hpp" 36 #endif // INCLUDE_ALL_GCS 37 38 inline void MarkSweep::mark_object(oop obj) { 39 #if INCLUDE_ALL_GCS 40 if (G1StringDedup::is_enabled()) { 41 // We must enqueue the object before it is marked 42 // as we otherwise can't read the object's age. 43 G1StringDedup::enqueue_from_mark(obj); 44 } 45 #endif 46 // some marks may contain information we need to preserve so we store them away 47 // and overwrite the mark. We'll restore it at the end of markSweep. 48 markOop mark = obj->mark(); 49 obj->set_mark(markOopDesc::prototype()->set_marked()); 50 51 if (mark->must_be_preserved(obj)) { 52 preserve_mark(obj, mark); 53 } 54 } 55 56 inline void MarkSweep::follow_klass(Klass* klass) { 57 oop op = klass->klass_holder(); 58 MarkSweep::mark_and_push(&op); 59 } 60 61 inline void MarkSweep::follow_object(oop obj) { 62 obj->follow_contents(); 63 } 64 65 template <class T> inline void MarkSweep::follow_root(T* p) { 66 assert(!Universe::heap()->is_in_reserved(p), 67 "roots shouldn't be things within the heap"); 68 T heap_oop = oopDesc::load_heap_oop(p); 69 if (!oopDesc::is_null(heap_oop)) { 70 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); 71 if (!obj->mark()->is_marked()) { 72 mark_object(obj); 73 follow_object(obj); 74 } 75 } 76 follow_stack(); 77 } 78 79 template <class T> inline void MarkSweep::mark_and_push(T* p) { 80 // assert(Universe::heap()->is_in_reserved(p), "should be in object space"); 81 T heap_oop = oopDesc::load_heap_oop(p); 82 if (!oopDesc::is_null(heap_oop)) { 83 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); 84 if (!obj->mark()->is_marked()) { 85 mark_object(obj); 86 _marking_stack.push(obj); 87 } 88 } 89 } 90 91 void MarkSweep::push_objarray(oop obj, size_t index) { 92 ObjArrayTask task(obj, index); 93 assert(task.is_valid(), "bad ObjArrayTask"); 94 _objarray_stack.push(task); 95 } 96 97 inline int MarkSweep::adjust_pointers(oop obj) { 98 return obj->adjust_pointers(); 99 } 100 101 template <class T> inline void MarkSweep::adjust_pointer(T* p) { 102 T heap_oop = oopDesc::load_heap_oop(p); 103 if (!oopDesc::is_null(heap_oop)) { 104 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); 105 oop new_obj = oop(obj->mark()->decode_pointer()); 106 assert(new_obj != NULL || // is forwarding ptr? 107 obj->mark() == markOopDesc::prototype() || // not gc marked? 108 (UseBiasedLocking && obj->mark()->has_bias_pattern()), 109 // not gc marked? 110 "should be forwarded"); 111 if (new_obj != NULL) { 112 assert(Universe::heap()->is_in_reserved(new_obj), 113 "should be in object space"); 114 oopDesc::encode_store_heap_oop_not_null(p, new_obj); 115 } 116 } 117 } 118 119 template <class T> inline void MarkSweep::KeepAliveClosure::do_oop_work(T* p) { 120 mark_and_push(p); 121 } 122 123 #endif // SHARE_VM_GC_IMPLEMENTATION_SHARED_MARKSWEEP_INLINE_HPP | 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_VM_GC_IMPLEMENTATION_SHARED_MARKSWEEP_INLINE_HPP 26 #define SHARE_VM_GC_IMPLEMENTATION_SHARED_MARKSWEEP_INLINE_HPP 27 28 #include "gc_implementation/shared/markSweep.hpp" 29 #include "gc_interface/collectedHeap.hpp" 30 #include "oops/markOop.inline.hpp" 31 #include "oops/instanceKlass.inline.hpp" 32 #include "oops/instanceClassLoaderKlass.inline.hpp" 33 #include "oops/instanceMirrorKlass.inline.hpp" 34 #include "oops/instanceRefKlass.inline.hpp" 35 #include "oops/objArrayKlass.inline.hpp" 36 #include "utilities/stack.inline.hpp" 37 #include "utilities/macros.hpp" 38 #if INCLUDE_ALL_GCS 39 #include "gc_implementation/g1/g1StringDedup.hpp" 40 #endif // INCLUDE_ALL_GCS 41 42 inline void MarkSweep::mark_object(oop obj) { 43 #if INCLUDE_ALL_GCS 44 if (G1StringDedup::is_enabled()) { 45 // We must enqueue the object before it is marked 46 // as we otherwise can't read the object's age. 47 G1StringDedup::enqueue_from_mark(obj); 48 } 49 #endif 50 // some marks may contain information we need to preserve so we store them away 51 // and overwrite the mark. We'll restore it at the end of markSweep. 52 markOop mark = obj->mark(); 53 obj->set_mark(markOopDesc::prototype()->set_marked()); 54 55 if (mark->must_be_preserved(obj)) { 56 preserve_mark(obj, mark); 57 } 58 } 59 60 inline void MarkSweep::follow_klass(Klass* klass) { 61 oop op = klass->klass_holder(); 62 MarkSweep::mark_and_push(&op); 63 } 64 65 inline void MarkSweep::follow_object(oop obj) { 66 assert(obj->is_gc_marked(), "should be marked"); 67 68 obj->ms_follow_contents(); 69 } 70 71 template <class T> inline void MarkSweep::follow_root(T* p) { 72 assert(!Universe::heap()->is_in_reserved(p), 73 "roots shouldn't be things within the heap"); 74 T heap_oop = oopDesc::load_heap_oop(p); 75 if (!oopDesc::is_null(heap_oop)) { 76 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); 77 if (!obj->mark()->is_marked()) { 78 mark_object(obj); 79 follow_object(obj); 80 } 81 } 82 follow_stack(); 83 } 84 85 template <class T> inline void MarkSweep::mark_and_push(T* p) { 86 // assert(Universe::heap()->is_in_reserved(p), "should be in object space"); 87 T heap_oop = oopDesc::load_heap_oop(p); 88 if (!oopDesc::is_null(heap_oop)) { 89 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); 90 if (!obj->mark()->is_marked()) { 91 mark_object(obj); 92 _marking_stack.push(obj); 93 } 94 } 95 } 96 97 void MarkSweep::push_objarray(oop obj, size_t index) { 98 ObjArrayTask task(obj, index); 99 assert(task.is_valid(), "bad ObjArrayTask"); 100 _objarray_stack.push(task); 101 } 102 103 inline int MarkSweep::adjust_pointers(oop obj) { 104 return obj->ms_adjust_pointers(); 105 } 106 107 template <class T> inline void MarkSweep::adjust_pointer(T* p) { 108 T heap_oop = oopDesc::load_heap_oop(p); 109 if (!oopDesc::is_null(heap_oop)) { 110 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); 111 assert(Universe::heap()->is_in(obj), "should be in heap"); 112 113 oop new_obj = oop(obj->mark()->decode_pointer()); 114 assert(new_obj != NULL || // is forwarding ptr? 115 obj->mark() == markOopDesc::prototype() || // not gc marked? 116 (UseBiasedLocking && obj->mark()->has_bias_pattern()), 117 // not gc marked? 118 "should be forwarded"); 119 if (new_obj != NULL) { 120 assert(Universe::heap()->is_in_reserved(new_obj), 121 "should be in object space"); 122 oopDesc::encode_store_heap_oop_not_null(p, new_obj); 123 } 124 } 125 } 126 127 template <class T> inline void MarkSweep::KeepAliveClosure::do_oop_work(T* p) { 128 mark_and_push(p); 129 } 130 131 #endif // SHARE_VM_GC_IMPLEMENTATION_SHARED_MARKSWEEP_INLINE_HPP |