16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
24 */
25
26 #include "code/codeCache.hpp"
27 #include "code/nmethod.hpp"
28 #include "gc/shared/classUnloadingContext.hpp"
29 #include "gc/shenandoah/shenandoahClosures.inline.hpp"
30 #include "gc/shenandoah/shenandoahHeap.inline.hpp"
31 #include "gc/shenandoah/shenandoahNMethod.inline.hpp"
32 #include "gc/shenandoah/shenandoahUtils.hpp"
33 #include "memory/resourceArea.hpp"
34 #include "memory/universe.hpp"
35 #include "runtime/atomicAccess.hpp"
36 #include "utilities/powerOfTwo.hpp"
37
38
39 ShenandoahNMethodTable* ShenandoahCodeRoots::_nmethod_table;
40 int ShenandoahCodeRoots::_disarmed_value = 1;
41
42 void ShenandoahCodeRoots::initialize() {
43 _nmethod_table = new ShenandoahNMethodTable();
44 }
45
46 void ShenandoahCodeRoots::register_nmethod(nmethod* nm) {
47 assert(CodeCache_lock->owned_by_self(), "Must have CodeCache_lock held");
48 _nmethod_table->register_nmethod(nm);
49 }
50
51 void ShenandoahCodeRoots::unregister_nmethod(nmethod* nm) {
52 assert_locked_or_safepoint(CodeCache_lock);
53 _nmethod_table->unregister_nmethod(nm);
54 }
55
56 void ShenandoahCodeRoots::arm_nmethods() {
57 BarrierSet::barrier_set()->barrier_set_nmethod()->arm_all_nmethods();
58 }
59
60 class ShenandoahDisarmNMethodClosure : public NMethodClosure {
61 public:
62 virtual void do_nmethod(nmethod* nm) {
63 ShenandoahNMethod::disarm_nmethod(nm);
64 }
65 };
66
67 class ShenandoahDisarmNMethodsTask : public WorkerTask {
68 private:
69 ShenandoahDisarmNMethodClosure _cl;
70 ShenandoahConcurrentNMethodIterator _iterator;
71
72 public:
73 ShenandoahDisarmNMethodsTask() :
74 WorkerTask("Shenandoah Disarm NMethods"),
75 _iterator(ShenandoahCodeRoots::table()) {
76 assert(SafepointSynchronize::is_at_safepoint(), "Only at a safepoint");
77 }
78
79 virtual void work(uint worker_id) {
80 ShenandoahParallelWorkerSession worker_session(worker_id);
81 _iterator.nmethods_do(&_cl);
82 }
83 };
84
85 void ShenandoahCodeRoots::disarm_nmethods() {
86 ShenandoahDisarmNMethodsTask task;
87 ShenandoahHeap::heap()->workers()->run_task(&task);
88 }
89
90 class ShenandoahNMethodUnlinkClosure : public NMethodClosure {
91 private:
92 bool _unloading_occurred;
93 ShenandoahHeap* const _heap;
94 BarrierSetNMethod* const _bs;
95
96 public:
97 ShenandoahNMethodUnlinkClosure(bool unloading_occurred) :
98 _unloading_occurred(unloading_occurred),
99 _heap(ShenandoahHeap::heap()),
100 _bs(ShenandoahBarrierSet::barrier_set()->barrier_set_nmethod()) {}
101
102 virtual void do_nmethod(nmethod* nm) {
103 assert(_heap->is_concurrent_weak_root_in_progress(), "Only this phase");
104
105 ShenandoahNMethod* nm_data = ShenandoahNMethod::gc_data(nm);
106 assert(!nm_data->is_unregistered(), "Should not see unregistered entry");
107
108 if (nm->is_unloading()) {
109 ShenandoahNMethodLocker locker(nm_data->lock());
|
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
24 */
25
26 #include "code/codeCache.hpp"
27 #include "code/nmethod.hpp"
28 #include "gc/shared/classUnloadingContext.hpp"
29 #include "gc/shenandoah/shenandoahClosures.inline.hpp"
30 #include "gc/shenandoah/shenandoahHeap.inline.hpp"
31 #include "gc/shenandoah/shenandoahNMethod.inline.hpp"
32 #include "gc/shenandoah/shenandoahUtils.hpp"
33 #include "memory/resourceArea.hpp"
34 #include "memory/universe.hpp"
35 #include "runtime/atomicAccess.hpp"
36 #include "utilities/events.hpp"
37 #include "utilities/powerOfTwo.hpp"
38
39
40 ShenandoahNMethodTable* ShenandoahCodeRoots::_nmethod_table;
41 int ShenandoahCodeRoots::_disarmed_value = 1;
42
43 void ShenandoahCodeRoots::initialize() {
44 _nmethod_table = new ShenandoahNMethodTable();
45 }
46
47 void ShenandoahCodeRoots::register_nmethod(nmethod* nm) {
48 assert(CodeCache_lock->owned_by_self(), "Must have CodeCache_lock held");
49 _nmethod_table->register_nmethod(nm);
50 }
51
52 void ShenandoahCodeRoots::unregister_nmethod(nmethod* nm) {
53 assert_locked_or_safepoint(CodeCache_lock);
54 _nmethod_table->unregister_nmethod(nm);
55 }
56
57 void ShenandoahCodeRoots::arm_nmethods() {
58 BarrierSet::barrier_set()->barrier_set_nmethod()->arm_all_nmethods();
59 }
60
61 class ShenandoahNMethodUnlinkClosure : public NMethodClosure {
62 private:
63 bool _unloading_occurred;
64 ShenandoahHeap* const _heap;
65 BarrierSetNMethod* const _bs;
66
67 public:
68 ShenandoahNMethodUnlinkClosure(bool unloading_occurred) :
69 _unloading_occurred(unloading_occurred),
70 _heap(ShenandoahHeap::heap()),
71 _bs(ShenandoahBarrierSet::barrier_set()->barrier_set_nmethod()) {}
72
73 virtual void do_nmethod(nmethod* nm) {
74 assert(_heap->is_concurrent_weak_root_in_progress(), "Only this phase");
75
76 ShenandoahNMethod* nm_data = ShenandoahNMethod::gc_data(nm);
77 assert(!nm_data->is_unregistered(), "Should not see unregistered entry");
78
79 if (nm->is_unloading()) {
80 ShenandoahNMethodLocker locker(nm_data->lock());
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