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_GC_G1_G1BARRIERSET_INLINE_HPP
26 #define SHARE_GC_G1_G1BARRIERSET_INLINE_HPP
27
28 #include "gc/g1/g1BarrierSet.hpp"
29 #include "gc/g1/g1CardTable.hpp"
30 #include "gc/shared/accessBarrierSupport.inline.hpp"
31 #include "oops/access.inline.hpp"
32 #include "oops/compressedOops.inline.hpp"
33 #include "oops/oop.hpp"
34
35 template <DecoratorSet decorators, typename T>
36 inline void G1BarrierSet::write_ref_field_pre(T* field) {
37 if (HasDecorator<decorators, IS_DEST_UNINITIALIZED>::value ||
38 HasDecorator<decorators, AS_NO_KEEPALIVE>::value) {
39 return;
40 }
41
42 T heap_oop = RawAccess<MO_VOLATILE>::oop_load(field);
43 if (!CompressedOops::is_null(heap_oop)) {
44 enqueue(CompressedOops::decode_not_null(heap_oop));
45 }
46 }
47
48 template <DecoratorSet decorators, typename T>
49 inline void G1BarrierSet::write_ref_field_post(T* field, oop new_val) {
50 volatile CardValue* byte = _card_table->byte_for(field);
51 if (*byte != G1CardTable::g1_young_card_val()) {
52 // Take a slow path for cards in old
53 write_ref_field_post_slow(byte);
54 }
55 }
56
57 inline void G1BarrierSet::enqueue_if_weak(DecoratorSet decorators, oop value) {
58 assert((decorators & ON_UNKNOWN_OOP_REF) == 0, "Reference strength must be known");
59 // Loading from a weak or phantom reference needs enqueueing, as
60 // the object may not have been reachable (part of the snapshot)
61 // when marking started.
62 const bool on_strong_oop_ref = (decorators & ON_STRONG_OOP_REF) != 0;
63 const bool peek = (decorators & AS_NO_KEEPALIVE) != 0;
64 const bool needs_enqueue = (!peek && !on_strong_oop_ref);
65
66 if (needs_enqueue && value != NULL) {
67 enqueue(value);
68 }
69 }
|
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_GC_G1_G1BARRIERSET_INLINE_HPP
26 #define SHARE_GC_G1_G1BARRIERSET_INLINE_HPP
27
28 #include "gc/g1/g1BarrierSet.hpp"
29 #include "gc/g1/g1CardTable.hpp"
30 #include "gc/shared/accessBarrierSupport.inline.hpp"
31 #include "oops/access.inline.hpp"
32 #include "oops/compressedOops.inline.hpp"
33 #include "oops/oop.hpp"
34 #ifdef ASSERT
35 #include "runtime/thread.inline.hpp"
36 #endif
37
38 template <DecoratorSet decorators, typename T>
39 inline void G1BarrierSet::write_ref_field_pre(T* field) {
40 if (HasDecorator<decorators, IS_DEST_UNINITIALIZED>::value ||
41 HasDecorator<decorators, AS_NO_KEEPALIVE>::value) {
42 return;
43 }
44
45 T heap_oop = RawAccess<MO_VOLATILE>::oop_load(field);
46 if (!CompressedOops::is_null(heap_oop)) {
47 enqueue(CompressedOops::decode_not_null(heap_oop));
48 }
49 }
50
51 template <DecoratorSet decorators, typename T>
52 inline void G1BarrierSet::write_ref_field_post(T* field, oop new_val) {
53 /*
54 #ifdef ASSERT
55 if (Thread::current()->is_Java_thread()) {
56 JavaThreadState s = ((JavaThread*)Thread::current())->thread_state();
57 if (s != _thread_in_vm) {
58 tty->print_cr("T(%s).state = %d", Thread::current()->name(), s);
59 assert(false, "fail");
60 }
61 } else {
62 tty->print_cr("T(%s) not JavaThread", Thread::current()->name());
63 tty->print_cr("At safepoint? %d", SafepointSynchronize::is_at_safepoint());
64 assert(false, "fail");
65 }
66 #endif
67 */
68 // assert(SafepointSynchronize::is_at_safepoint() ||
69 // (Thread::current()->is_Java_thread() &&
70 // ((JavaThread*)Thread::current())->thread_state() == _thread_in_vm),
71 // "sanity");
72
73 volatile CardValue* byte = _card_table->byte_for(field);
74 if (*byte != G1CardTable::g1_young_card_val()) {
75 // Take a slow path for cards in old
76 write_ref_field_post_slow(byte);
77 }
78 }
79
80 inline void G1BarrierSet::enqueue_if_weak(DecoratorSet decorators, oop value) {
81 assert((decorators & ON_UNKNOWN_OOP_REF) == 0, "Reference strength must be known");
82 // Loading from a weak or phantom reference needs enqueueing, as
83 // the object may not have been reachable (part of the snapshot)
84 // when marking started.
85 const bool on_strong_oop_ref = (decorators & ON_STRONG_OOP_REF) != 0;
86 const bool peek = (decorators & AS_NO_KEEPALIVE) != 0;
87 const bool needs_enqueue = (!peek && !on_strong_oop_ref);
88
89 if (needs_enqueue && value != NULL) {
90 enqueue(value);
91 }
92 }
|