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src/hotspot/share/oops/klass.cpp

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*** 434,444 **** set_next_sibling(prev_first_subklass); } // Note that the prev_first_subklass is always alive, meaning no sibling_next links // are ever created to not alive klasses. This is an important invariant of the lock-free // cleaning protocol, that allows us to safely unlink dead klasses from the sibling list. ! if (Atomic::cmpxchg(this, &super->_subklass, prev_first_subklass) == prev_first_subklass) { return; } } debug_only(verify();) } --- 434,444 ---- set_next_sibling(prev_first_subklass); } // Note that the prev_first_subklass is always alive, meaning no sibling_next links // are ever created to not alive klasses. This is an important invariant of the lock-free // cleaning protocol, that allows us to safely unlink dead klasses from the sibling list. ! if (Atomic::cmpxchg(&super->_subklass, prev_first_subklass, this) == prev_first_subklass) { return; } } debug_only(verify();) }
*** 449,459 **** Klass* subklass = Atomic::load_acquire(&_subklass); if (subklass == NULL || subklass->is_loader_alive()) { return; } // Try to fix _subklass until it points at something not dead. ! Atomic::cmpxchg(subklass->next_sibling(), &_subklass, subklass); } } void Klass::clean_weak_klass_links(bool unloading_occurred, bool clean_alive_klasses) { if (!ClassUnloading || !unloading_occurred) { --- 449,459 ---- Klass* subklass = Atomic::load_acquire(&_subklass); if (subklass == NULL || subklass->is_loader_alive()) { return; } // Try to fix _subklass until it points at something not dead. ! Atomic::cmpxchg(&_subklass, subklass, subklass->next_sibling()); } } void Klass::clean_weak_klass_links(bool unloading_occurred, bool clean_alive_klasses) { if (!ClassUnloading || !unloading_occurred) {
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