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 #include "precompiled.hpp"
26 #include "gc/g1/g1CollectedHeap.hpp"
27 #include "gc/g1/g1ConcurrentMarkBitMap.inline.hpp"
28 #include "gc/g1/g1FullCollector.hpp"
29 #include "gc/g1/g1FullCollector.inline.hpp"
30 #include "gc/g1/g1FullGCCompactionPoint.hpp"
31 #include "gc/g1/g1FullGCCompactTask.hpp"
32 #include "gc/g1/heapRegion.inline.hpp"
33 #include "gc/shared/gcTraceTime.inline.hpp"
34 #include "logging/log.hpp"
35 #include "oops/oop.inline.hpp"
36 #include "utilities/ticks.hpp"
37
38 // Do work for all skip-compacting regions.
39 class G1ResetSkipCompactingClosure : public HeapRegionClosure {
40 G1FullCollector* _collector;
41
42 public:
43 G1ResetSkipCompactingClosure(G1FullCollector* collector) : _collector(collector) { }
44
45 bool do_heap_region(HeapRegion* r) {
46 uint region_index = r->hrm_index();
47 // Only for skip-compaction regions; early return otherwise.
48 if (!_collector->is_skip_compacting(region_index)) {
49 return false;
50 }
51 #ifdef ASSERT
52 if (r->is_humongous()) {
53 oop obj = cast_to_oop(r->humongous_start_region()->bottom());
59 // should early-return above
60 ShouldNotReachHere();
61 } else {
62 assert(_collector->live_words(region_index) > _collector->scope()->region_compaction_threshold(),
63 "should be quite full");
64 }
65 #endif
66 r->reset_skip_compacting_after_full_gc();
67 return false;
68 }
69 };
70
71 void G1FullGCCompactTask::G1CompactRegionClosure::clear_in_bitmap(oop obj) {
72 assert(_bitmap->is_marked(obj), "Should only compact marked objects");
73 _bitmap->clear(obj);
74 }
75
76 size_t G1FullGCCompactTask::G1CompactRegionClosure::apply(oop obj) {
77 size_t size = obj->size();
78 if (obj->is_forwarded()) {
79 HeapWord* destination = cast_from_oop<HeapWord*>(obj->forwardee());
80
81 // copy object and reinit its mark
82 HeapWord* obj_addr = cast_from_oop<HeapWord*>(obj);
83 assert(obj_addr != destination, "everything in this pass should be moving");
84 Copy::aligned_conjoint_words(obj_addr, destination, size);
85
86 // There is no need to transform stack chunks - marking already did that.
87 cast_to_oop(destination)->init_mark();
88 assert(cast_to_oop(destination)->klass() != NULL, "should have a class");
89 }
90
91 // Clear the mark for the compacted object to allow reuse of the
92 // bitmap without an additional clearing step.
93 clear_in_bitmap(obj);
94 return size;
95 }
96
97 void G1FullGCCompactTask::compact_region(HeapRegion* hr) {
98 assert(!hr->is_pinned(), "Should be no pinned region in compaction queue");
99 assert(!hr->is_humongous(), "Should be no humongous regions in compaction queue");
|
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 #include "precompiled.hpp"
26 #include "gc/g1/g1CollectedHeap.hpp"
27 #include "gc/g1/g1ConcurrentMarkBitMap.inline.hpp"
28 #include "gc/g1/g1FullCollector.hpp"
29 #include "gc/g1/g1FullCollector.inline.hpp"
30 #include "gc/g1/g1FullGCCompactionPoint.hpp"
31 #include "gc/g1/g1FullGCCompactTask.hpp"
32 #include "gc/g1/heapRegion.inline.hpp"
33 #include "gc/shared/gcTraceTime.inline.hpp"
34 #include "gc/shared/slidingForwarding.inline.hpp"
35 #include "logging/log.hpp"
36 #include "oops/oop.inline.hpp"
37 #include "utilities/ticks.hpp"
38
39 // Do work for all skip-compacting regions.
40 class G1ResetSkipCompactingClosure : public HeapRegionClosure {
41 G1FullCollector* _collector;
42
43 public:
44 G1ResetSkipCompactingClosure(G1FullCollector* collector) : _collector(collector) { }
45
46 bool do_heap_region(HeapRegion* r) {
47 uint region_index = r->hrm_index();
48 // Only for skip-compaction regions; early return otherwise.
49 if (!_collector->is_skip_compacting(region_index)) {
50 return false;
51 }
52 #ifdef ASSERT
53 if (r->is_humongous()) {
54 oop obj = cast_to_oop(r->humongous_start_region()->bottom());
60 // should early-return above
61 ShouldNotReachHere();
62 } else {
63 assert(_collector->live_words(region_index) > _collector->scope()->region_compaction_threshold(),
64 "should be quite full");
65 }
66 #endif
67 r->reset_skip_compacting_after_full_gc();
68 return false;
69 }
70 };
71
72 void G1FullGCCompactTask::G1CompactRegionClosure::clear_in_bitmap(oop obj) {
73 assert(_bitmap->is_marked(obj), "Should only compact marked objects");
74 _bitmap->clear(obj);
75 }
76
77 size_t G1FullGCCompactTask::G1CompactRegionClosure::apply(oop obj) {
78 size_t size = obj->size();
79 if (obj->is_forwarded()) {
80 HeapWord* destination = cast_from_oop<HeapWord*>(_forwarding->forwardee(obj));
81
82 // copy object and reinit its mark
83 HeapWord* obj_addr = cast_from_oop<HeapWord*>(obj);
84 assert(obj_addr != destination, "everything in this pass should be moving");
85 Copy::aligned_conjoint_words(obj_addr, destination, size);
86
87 // There is no need to transform stack chunks - marking already did that.
88 cast_to_oop(destination)->init_mark();
89 assert(cast_to_oop(destination)->klass() != NULL, "should have a class");
90 }
91
92 // Clear the mark for the compacted object to allow reuse of the
93 // bitmap without an additional clearing step.
94 clear_in_bitmap(obj);
95 return size;
96 }
97
98 void G1FullGCCompactTask::compact_region(HeapRegion* hr) {
99 assert(!hr->is_pinned(), "Should be no pinned region in compaction queue");
100 assert(!hr->is_humongous(), "Should be no humongous regions in compaction queue");
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