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 template <class T> inline void MarkSweep::follow_root(T* p) {
62 assert(!Universe::heap()->is_in_reserved(p),
63 "roots shouldn't be things within the heap");
64 T heap_oop = oopDesc::load_heap_oop(p);
65 if (!oopDesc::is_null(heap_oop)) {
66 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop);
67 if (!obj->mark()->is_marked()) {
68 mark_object(obj);
69 obj->follow_contents();
70 }
71 }
72 follow_stack();
73 }
74
75 template <class T> inline void MarkSweep::mark_and_push(T* p) {
76 // assert(Universe::heap()->is_in_reserved(p), "should be in object space");
77 T heap_oop = oopDesc::load_heap_oop(p);
78 if (!oopDesc::is_null(heap_oop)) {
79 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop);
80 if (!obj->mark()->is_marked()) {
81 mark_object(obj);
82 _marking_stack.push(obj);
83 }
84 }
85 }
86
87 void MarkSweep::push_objarray(oop obj, size_t index) {
88 ObjArrayTask task(obj, index);
89 assert(task.is_valid(), "bad ObjArrayTask");
90 _objarray_stack.push(task);
91 }
92
93 template <class T> inline void MarkSweep::adjust_pointer(T* p) {
94 T heap_oop = oopDesc::load_heap_oop(p);
95 if (!oopDesc::is_null(heap_oop)) {
96 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop);
97 oop new_obj = oop(obj->mark()->decode_pointer());
98 assert(new_obj != NULL || // is forwarding ptr?
99 obj->mark() == markOopDesc::prototype() || // not gc marked?
100 (UseBiasedLocking && obj->mark()->has_bias_pattern()),
101 // not gc marked?
102 "should be forwarded");
103 if (new_obj != NULL) {
104 assert(Universe::heap()->is_in_reserved(new_obj),
105 "should be in object space");
106 oopDesc::encode_store_heap_oop_not_null(p, new_obj);
107 }
108 }
109 }
110
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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 obj->follow_contents();
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
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