580 // biasable prototype for instanceKlasses. There is no technical
581 // reason why it could not be done for arrayKlasses aside from
582 // wanting to reduce the initial scope of this optimization. There
583 // are potential problems in setting the bias pattern for
584 // JVM-internal oops.
585 inline void set_prototype_header(markOop header);
586 static ByteSize prototype_header_offset() { return in_ByteSize(offset_of(Klass, _prototype_header)); }
587
588 int biased_lock_revocation_count() const { return (int) _biased_lock_revocation_count; }
589 // Atomically increments biased_lock_revocation_count and returns updated value
590 int atomic_incr_biased_lock_revocation_count();
591 void set_biased_lock_revocation_count(int val) { _biased_lock_revocation_count = (jint) val; }
592 jlong last_biased_lock_bulk_revocation_time() { return _last_biased_lock_bulk_revocation_time; }
593 void set_last_biased_lock_bulk_revocation_time(jlong cur_time) { _last_biased_lock_bulk_revocation_time = cur_time; }
594
595 TRACE_DEFINE_TRACE_ID_METHODS;
596
597 // garbage collection support
598 void oops_do(OopClosure* cl);
599
600 // Iff the class loader (or mirror for anonymous classes) is alive the
601 // Klass is considered alive.
602 // The is_alive closure passed in depends on the Garbage Collector used.
603 bool is_loader_alive(BoolObjectClosure* is_alive);
604
605 static void clean_weak_klass_links(BoolObjectClosure* is_alive, bool clean_alive_klasses = true);
606 static void clean_subklass_tree(BoolObjectClosure* is_alive) {
607 clean_weak_klass_links(is_alive, false /* clean_alive_klasses */);
608 }
609
610 // GC specific object visitors
611 //
612 #if INCLUDE_ALL_GCS
613 // Parallel Scavenge
614 virtual void oop_ps_push_contents( oop obj, PSPromotionManager* pm) = 0;
615 // Parallel Compact
616 virtual void oop_pc_follow_contents(oop obj, ParCompactionManager* cm) = 0;
617 virtual void oop_pc_update_pointers(oop obj, ParCompactionManager* cm) = 0;
618 #endif
619
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580 // biasable prototype for instanceKlasses. There is no technical
581 // reason why it could not be done for arrayKlasses aside from
582 // wanting to reduce the initial scope of this optimization. There
583 // are potential problems in setting the bias pattern for
584 // JVM-internal oops.
585 inline void set_prototype_header(markOop header);
586 static ByteSize prototype_header_offset() { return in_ByteSize(offset_of(Klass, _prototype_header)); }
587
588 int biased_lock_revocation_count() const { return (int) _biased_lock_revocation_count; }
589 // Atomically increments biased_lock_revocation_count and returns updated value
590 int atomic_incr_biased_lock_revocation_count();
591 void set_biased_lock_revocation_count(int val) { _biased_lock_revocation_count = (jint) val; }
592 jlong last_biased_lock_bulk_revocation_time() { return _last_biased_lock_bulk_revocation_time; }
593 void set_last_biased_lock_bulk_revocation_time(jlong cur_time) { _last_biased_lock_bulk_revocation_time = cur_time; }
594
595 TRACE_DEFINE_TRACE_ID_METHODS;
596
597 // garbage collection support
598 void oops_do(OopClosure* cl);
599
600 virtual void metaspace_pointers_do(MetaspaceClosure* iter);
601 virtual MetaspaceObj::Type type() const { return ClassType; }
602
603 // Iff the class loader (or mirror for anonymous classes) is alive the
604 // Klass is considered alive.
605 // The is_alive closure passed in depends on the Garbage Collector used.
606 bool is_loader_alive(BoolObjectClosure* is_alive);
607
608 static void clean_weak_klass_links(BoolObjectClosure* is_alive, bool clean_alive_klasses = true);
609 static void clean_subklass_tree(BoolObjectClosure* is_alive) {
610 clean_weak_klass_links(is_alive, false /* clean_alive_klasses */);
611 }
612
613 // GC specific object visitors
614 //
615 #if INCLUDE_ALL_GCS
616 // Parallel Scavenge
617 virtual void oop_ps_push_contents( oop obj, PSPromotionManager* pm) = 0;
618 // Parallel Compact
619 virtual void oop_pc_follow_contents(oop obj, ParCompactionManager* cm) = 0;
620 virtual void oop_pc_update_pointers(oop obj, ParCompactionManager* cm) = 0;
621 #endif
622
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