588 }
589 ShouldNotReachHere(); // should have found this class!!
590 }
591
592 void ClassLoaderData::unload() {
593 _unloading = true;
594
595 LogTarget(Trace, class, loader, data) lt;
596 if (lt.is_enabled()) {
597 ResourceMark rm;
598 LogStream ls(lt);
599 ls.print("unload");
600 print_value_on(&ls);
601 ls.cr();
602 }
603
604 // Some items on the _deallocate_list need to free their C heap structures
605 // if they are not already on the _klasses list.
606 free_deallocate_list_C_heap_structures();
607
608 // Tell serviceability tools these classes are unloading
609 // after erroneous classes are released.
610 classes_do(InstanceKlass::notify_unload_class);
611
612 // Clean up global class iterator for compiler
613 static_klass_iterator.adjust_saved_class(this);
614 }
615
616 ModuleEntryTable* ClassLoaderData::modules() {
617 // Lazily create the module entry table at first request.
618 // Lock-free access requires load_acquire.
619 ModuleEntryTable* modules = OrderAccess::load_acquire(&_modules);
620 if (modules == NULL) {
621 MutexLocker m1(Module_lock);
622 // Check if _modules got allocated while we were waiting for this lock.
623 if ((modules = _modules) == NULL) {
624 modules = new ModuleEntryTable(ModuleEntryTable::_moduletable_entry_size);
625
626 {
627 MutexLockerEx m1(metaspace_lock(), Mutex::_no_safepoint_check_flag);
628 // Ensure _modules is stable, since it is examined without a lock
629 OrderAccess::release_store(&_modules, modules);
630 }
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588 }
589 ShouldNotReachHere(); // should have found this class!!
590 }
591
592 void ClassLoaderData::unload() {
593 _unloading = true;
594
595 LogTarget(Trace, class, loader, data) lt;
596 if (lt.is_enabled()) {
597 ResourceMark rm;
598 LogStream ls(lt);
599 ls.print("unload");
600 print_value_on(&ls);
601 ls.cr();
602 }
603
604 // Some items on the _deallocate_list need to free their C heap structures
605 // if they are not already on the _klasses list.
606 free_deallocate_list_C_heap_structures();
607
608 // Clean up class dependencies and tell serviceability tools
609 // these classes are unloading. Must be called
610 // after erroneous classes are released.
611 classes_do(InstanceKlass::unload_class);
612
613 // Clean up global class iterator for compiler
614 static_klass_iterator.adjust_saved_class(this);
615 }
616
617 ModuleEntryTable* ClassLoaderData::modules() {
618 // Lazily create the module entry table at first request.
619 // Lock-free access requires load_acquire.
620 ModuleEntryTable* modules = OrderAccess::load_acquire(&_modules);
621 if (modules == NULL) {
622 MutexLocker m1(Module_lock);
623 // Check if _modules got allocated while we were waiting for this lock.
624 if ((modules = _modules) == NULL) {
625 modules = new ModuleEntryTable(ModuleEntryTable::_moduletable_entry_size);
626
627 {
628 MutexLockerEx m1(metaspace_lock(), Mutex::_no_safepoint_check_flag);
629 // Ensure _modules is stable, since it is examined without a lock
630 OrderAccess::release_store(&_modules, modules);
631 }
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