20 * CA 95054 USA or visit www.sun.com if you need additional information or |
20 * CA 95054 USA or visit www.sun.com if you need additional information or |
21 * have any questions. |
21 * have any questions. |
22 * |
22 * |
23 */ |
23 */ |
24 |
24 |
25 |
|
26 inline void PSScavenge::save_to_space_top_before_gc() { |
25 inline void PSScavenge::save_to_space_top_before_gc() { |
27 ParallelScavengeHeap* heap = (ParallelScavengeHeap*)Universe::heap(); |
26 ParallelScavengeHeap* heap = (ParallelScavengeHeap*)Universe::heap(); |
28 _to_space_top_before_gc = heap->young_gen()->to_space()->top(); |
27 _to_space_top_before_gc = heap->young_gen()->to_space()->top(); |
29 } |
28 } |
30 |
29 |
31 inline bool PSScavenge::should_scavenge(oop p) { |
30 template <class T> inline bool PSScavenge::should_scavenge(T* p) { |
32 return p == NULL ? false : PSScavenge::is_obj_in_young((HeapWord*) p); |
31 T heap_oop = oopDesc::load_heap_oop(p); |
|
32 if (oopDesc::is_null(heap_oop)) return false; |
|
33 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); |
|
34 return PSScavenge::is_obj_in_young((HeapWord*)obj); |
33 } |
35 } |
34 |
36 |
35 inline bool PSScavenge::should_scavenge(oop p, MutableSpace* to_space) { |
37 template <class T> |
|
38 inline bool PSScavenge::should_scavenge(T* p, MutableSpace* to_space) { |
36 if (should_scavenge(p)) { |
39 if (should_scavenge(p)) { |
|
40 oop obj = oopDesc::load_decode_heap_oop_not_null(p); |
37 // Skip objects copied to to_space since the scavenge started. |
41 // Skip objects copied to to_space since the scavenge started. |
38 HeapWord* const addr = (HeapWord*) p; |
42 HeapWord* const addr = (HeapWord*)obj; |
39 return addr < to_space_top_before_gc() || addr >= to_space->end(); |
43 return addr < to_space_top_before_gc() || addr >= to_space->end(); |
40 } |
44 } |
41 return false; |
45 return false; |
42 } |
46 } |
43 |
47 |
44 inline bool PSScavenge::should_scavenge(oop p, bool check_to_space) { |
48 template <class T> |
|
49 inline bool PSScavenge::should_scavenge(T* p, bool check_to_space) { |
45 if (check_to_space) { |
50 if (check_to_space) { |
46 ParallelScavengeHeap* heap = (ParallelScavengeHeap*) Universe::heap(); |
51 ParallelScavengeHeap* heap = (ParallelScavengeHeap*)Universe::heap(); |
47 return should_scavenge(p, heap->young_gen()->to_space()); |
52 return should_scavenge(p, heap->young_gen()->to_space()); |
48 } |
53 } |
49 return should_scavenge(p); |
54 return should_scavenge(p); |
50 } |
55 } |
51 |
56 |
52 // Attempt to "claim" oop at p via CAS, push the new obj if successful |
57 // Attempt to "claim" oop at p via CAS, push the new obj if successful |
53 // This version tests the oop* to make sure it is within the heap before |
58 // This version tests the oop* to make sure it is within the heap before |
54 // attempting marking. |
59 // attempting marking. |
|
60 template <class T> |
55 inline void PSScavenge::copy_and_push_safe_barrier(PSPromotionManager* pm, |
61 inline void PSScavenge::copy_and_push_safe_barrier(PSPromotionManager* pm, |
56 oop* p) { |
62 T* p) { |
57 assert(should_scavenge(*p, true), "revisiting object?"); |
63 assert(should_scavenge(p, true), "revisiting object?"); |
58 |
64 |
59 oop o = *p; |
65 oop o = oopDesc::load_decode_heap_oop_not_null(p); |
60 if (o->is_forwarded()) { |
66 oop new_obj = o->is_forwarded() |
61 *p = o->forwardee(); |
67 ? o->forwardee() |
62 } else { |
68 : pm->copy_to_survivor_space(o, pm->depth_first()); |
63 *p = pm->copy_to_survivor_space(o, pm->depth_first()); |
69 oopDesc::encode_store_heap_oop_not_null(p, new_obj); |
64 } |
|
65 |
70 |
66 // We cannot mark without test, as some code passes us pointers |
71 // We cannot mark without test, as some code passes us pointers |
67 // that are outside the heap. |
72 // that are outside the heap. |
68 if ((!PSScavenge::is_obj_in_young((HeapWord*) p)) && |
73 if ((!PSScavenge::is_obj_in_young((HeapWord*)p)) && |
69 Universe::heap()->is_in_reserved(p)) { |
74 Universe::heap()->is_in_reserved(p)) { |
70 o = *p; |
75 if (PSScavenge::is_obj_in_young((HeapWord*)new_obj)) { |
71 if (PSScavenge::is_obj_in_young((HeapWord*) o)) { |
76 card_table()->inline_write_ref_field_gc(p, new_obj); |
72 card_table()->inline_write_ref_field_gc(p, o); |
|
73 } |
77 } |
74 } |
78 } |
75 } |
79 } |