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_PARALLEL_PSSCAVENGE_INLINE_HPP
26 #define SHARE_VM_GC_PARALLEL_PSSCAVENGE_INLINE_HPP
27
28 #include "gc/parallel/parallelScavengeHeap.hpp"
29 #include "gc/parallel/psPromotionManager.inline.hpp"
30 #include "gc/parallel/psScavenge.hpp"
31 #include "logging/log.hpp"
32 #include "memory/iterator.hpp"
33 #include "memory/resourceArea.hpp"
34 #include "utilities/globalDefinitions.hpp"
35
36 inline void PSScavenge::save_to_space_top_before_gc() {
37 ParallelScavengeHeap* heap = ParallelScavengeHeap::heap();
38 _to_space_top_before_gc = heap->young_gen()->to_space()->top();
39 }
40
41 template <class T> inline bool PSScavenge::should_scavenge(T* p) {
42 T heap_oop = oopDesc::load_heap_oop(p);
43 return PSScavenge::is_obj_in_young(heap_oop);
44 }
45
46 template <class T>
47 inline bool PSScavenge::should_scavenge(T* p, MutableSpace* to_space) {
48 if (should_scavenge(p)) {
49 oop obj = oopDesc::load_decode_heap_oop_not_null(p);
50 // Skip objects copied to to_space since the scavenge started.
51 HeapWord* const addr = (HeapWord*)obj;
52 return addr < to_space_top_before_gc() || addr >= to_space->end();
53 }
54 return false;
55 }
56
57 template <class T>
58 inline bool PSScavenge::should_scavenge(T* p, bool check_to_space) {
59 if (check_to_space) {
60 ParallelScavengeHeap* heap = ParallelScavengeHeap::heap();
61 return should_scavenge(p, heap->young_gen()->to_space());
62 }
63 return should_scavenge(p);
64 }
65
66 template<bool promote_immediately>
67 class PSRootsClosure: public OopClosure {
68 private:
69 PSPromotionManager* _promotion_manager;
90 PSPromotionManager* _pm;
91 // Used to redirty a scanned cld if it has oops
92 // pointing to the young generation after being scanned.
93 ClassLoaderData* _scanned_cld;
94 public:
95 PSScavengeFromCLDClosure(PSPromotionManager* pm) : _pm(pm), _scanned_cld(NULL) { }
96 void do_oop(narrowOop* p) { ShouldNotReachHere(); }
97 void do_oop(oop* p) {
98 ParallelScavengeHeap* psh = ParallelScavengeHeap::heap();
99 assert(!psh->is_in_reserved(p), "GC barrier needed");
100 if (PSScavenge::should_scavenge(p)) {
101 assert(PSScavenge::should_scavenge(p, true), "revisiting object?");
102
103 oop o = *p;
104 oop new_obj;
105 if (o->is_forwarded()) {
106 new_obj = o->forwardee();
107 } else {
108 new_obj = _pm->copy_to_survivor_space</*promote_immediately=*/false>(o);
109 }
110 oopDesc::encode_store_heap_oop_not_null(p, new_obj);
111
112 if (PSScavenge::is_obj_in_young(new_obj)) {
113 do_cld_barrier();
114 }
115 }
116 }
117
118 void set_scanned_cld(ClassLoaderData* cld) {
119 assert(_scanned_cld == NULL || cld == NULL, "Should always only handling one cld at a time");
120 _scanned_cld = cld;
121 }
122
123 private:
124 void do_cld_barrier() {
125 assert(_scanned_cld != NULL, "Should not be called without having a scanned cld");
126 _scanned_cld->record_modified_oops();
127 }
128 };
129
130 // Scavenges the oop in a ClassLoaderData.
|
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_PARALLEL_PSSCAVENGE_INLINE_HPP
26 #define SHARE_VM_GC_PARALLEL_PSSCAVENGE_INLINE_HPP
27
28 #include "gc/parallel/parallelScavengeHeap.hpp"
29 #include "gc/parallel/psPromotionManager.inline.hpp"
30 #include "gc/parallel/psScavenge.hpp"
31 #include "logging/log.hpp"
32 #include "memory/iterator.hpp"
33 #include "memory/resourceArea.hpp"
34 #include "oops/access.inline.hpp"
35 #include "utilities/globalDefinitions.hpp"
36
37 inline void PSScavenge::save_to_space_top_before_gc() {
38 ParallelScavengeHeap* heap = ParallelScavengeHeap::heap();
39 _to_space_top_before_gc = heap->young_gen()->to_space()->top();
40 }
41
42 template <class T> inline bool PSScavenge::should_scavenge(T* p) {
43 T heap_oop = RawAccess<>::oop_load(p);
44 return PSScavenge::is_obj_in_young(heap_oop);
45 }
46
47 template <class T>
48 inline bool PSScavenge::should_scavenge(T* p, MutableSpace* to_space) {
49 if (should_scavenge(p)) {
50 oop obj = RawAccess<OOP_NOT_NULL>::oop_load(p);
51 // Skip objects copied to to_space since the scavenge started.
52 HeapWord* const addr = (HeapWord*)obj;
53 return addr < to_space_top_before_gc() || addr >= to_space->end();
54 }
55 return false;
56 }
57
58 template <class T>
59 inline bool PSScavenge::should_scavenge(T* p, bool check_to_space) {
60 if (check_to_space) {
61 ParallelScavengeHeap* heap = ParallelScavengeHeap::heap();
62 return should_scavenge(p, heap->young_gen()->to_space());
63 }
64 return should_scavenge(p);
65 }
66
67 template<bool promote_immediately>
68 class PSRootsClosure: public OopClosure {
69 private:
70 PSPromotionManager* _promotion_manager;
91 PSPromotionManager* _pm;
92 // Used to redirty a scanned cld if it has oops
93 // pointing to the young generation after being scanned.
94 ClassLoaderData* _scanned_cld;
95 public:
96 PSScavengeFromCLDClosure(PSPromotionManager* pm) : _pm(pm), _scanned_cld(NULL) { }
97 void do_oop(narrowOop* p) { ShouldNotReachHere(); }
98 void do_oop(oop* p) {
99 ParallelScavengeHeap* psh = ParallelScavengeHeap::heap();
100 assert(!psh->is_in_reserved(p), "GC barrier needed");
101 if (PSScavenge::should_scavenge(p)) {
102 assert(PSScavenge::should_scavenge(p, true), "revisiting object?");
103
104 oop o = *p;
105 oop new_obj;
106 if (o->is_forwarded()) {
107 new_obj = o->forwardee();
108 } else {
109 new_obj = _pm->copy_to_survivor_space</*promote_immediately=*/false>(o);
110 }
111 RawAccess<>::oop_store(p, new_obj);
112
113 if (PSScavenge::is_obj_in_young(new_obj)) {
114 do_cld_barrier();
115 }
116 }
117 }
118
119 void set_scanned_cld(ClassLoaderData* cld) {
120 assert(_scanned_cld == NULL || cld == NULL, "Should always only handling one cld at a time");
121 _scanned_cld = cld;
122 }
123
124 private:
125 void do_cld_barrier() {
126 assert(_scanned_cld != NULL, "Should not be called without having a scanned cld");
127 _scanned_cld->record_modified_oops();
128 }
129 };
130
131 // Scavenges the oop in a ClassLoaderData.
|