438 }
439
440 // Find and set the first alive sibling
441 Klass* sibling = current->next_sibling_oop();
442 while (sibling != NULL && !sibling->is_loader_alive(is_alive)) {
443 if (TraceClassUnloading && WizardMode) {
444 ResourceMark rm;
445 tty->print_cr("[Unlinking class (sibling) %s]", sibling->external_name());
446 }
447 sibling = sibling->next_sibling_oop();
448 }
449 current->set_next_sibling(sibling);
450 if (sibling != NULL) {
451 stack.push(sibling);
452 }
453
454 // Clean the implementors list and method data.
455 if (clean_alive_klasses && current->oop_is_instance()) {
456 InstanceKlass* ik = InstanceKlass::cast(current);
457 ik->clean_weak_instanceklass_links(is_alive);
458 }
459 }
460 }
461
462 void Klass::klass_update_barrier_set(oop v) {
463 record_modified_oops();
464 }
465
466 // This barrier is used by G1 to remember the old oop values, so
467 // that we don't forget any objects that were live at the snapshot at
468 // the beginning. This function is only used when we write oops into Klasses.
469 void Klass::klass_update_barrier_set_pre(oop* p, oop v) {
470 #if INCLUDE_ALL_GCS
471 if (UseG1GC) {
472 oop obj = *p;
473 if (obj != NULL) {
474 G1SATBCardTableModRefBS::enqueue(obj);
475 }
476 }
477 #endif
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438 }
439
440 // Find and set the first alive sibling
441 Klass* sibling = current->next_sibling_oop();
442 while (sibling != NULL && !sibling->is_loader_alive(is_alive)) {
443 if (TraceClassUnloading && WizardMode) {
444 ResourceMark rm;
445 tty->print_cr("[Unlinking class (sibling) %s]", sibling->external_name());
446 }
447 sibling = sibling->next_sibling_oop();
448 }
449 current->set_next_sibling(sibling);
450 if (sibling != NULL) {
451 stack.push(sibling);
452 }
453
454 // Clean the implementors list and method data.
455 if (clean_alive_klasses && current->oop_is_instance()) {
456 InstanceKlass* ik = InstanceKlass::cast(current);
457 ik->clean_weak_instanceklass_links(is_alive);
458
459 // JVMTI RedefineClasses creates previous versions that are not in
460 // the class hierarchy, so process them here.
461 while ((ik = ik->previous_versions()) != NULL) {
462 ik->clean_weak_instanceklass_links(is_alive);
463 }
464 }
465 }
466 }
467
468 void Klass::klass_update_barrier_set(oop v) {
469 record_modified_oops();
470 }
471
472 // This barrier is used by G1 to remember the old oop values, so
473 // that we don't forget any objects that were live at the snapshot at
474 // the beginning. This function is only used when we write oops into Klasses.
475 void Klass::klass_update_barrier_set_pre(oop* p, oop v) {
476 #if INCLUDE_ALL_GCS
477 if (UseG1GC) {
478 oop obj = *p;
479 if (obj != NULL) {
480 G1SATBCardTableModRefBS::enqueue(obj);
481 }
482 }
483 #endif
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