Mercurial > hg > graal-jvmci-8
comparison src/share/vm/classfile/classLoaderData.cpp @ 14484:3cdda110bbb5
8035412: Cleanup ClassLoaderData::is_alive
Reviewed-by: coleenp, mgerdin
author | stefank |
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date | Fri, 21 Feb 2014 10:19:09 +0100 |
parents | ce86c36b8921 |
children | f460c6926af7 |
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14483:be0ac0e8f6e7 | 14484:3cdda110bbb5 |
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71 | 71 |
72 ClassLoaderData * ClassLoaderData::_the_null_class_loader_data = NULL; | 72 ClassLoaderData * ClassLoaderData::_the_null_class_loader_data = NULL; |
73 | 73 |
74 ClassLoaderData::ClassLoaderData(Handle h_class_loader, bool is_anonymous, Dependencies dependencies) : | 74 ClassLoaderData::ClassLoaderData(Handle h_class_loader, bool is_anonymous, Dependencies dependencies) : |
75 _class_loader(h_class_loader()), | 75 _class_loader(h_class_loader()), |
76 _is_anonymous(is_anonymous), _keep_alive(is_anonymous), // initially | 76 _is_anonymous(is_anonymous), |
77 // An anonymous class loader data doesn't have anything to keep | |
78 // it from being unloaded during parsing of the anonymous class. | |
79 // The null-class-loader should always be kept alive. | |
80 _keep_alive(is_anonymous || h_class_loader.is_null()), | |
77 _metaspace(NULL), _unloading(false), _klasses(NULL), | 81 _metaspace(NULL), _unloading(false), _klasses(NULL), |
78 _claimed(0), _jmethod_ids(NULL), _handles(NULL), _deallocate_list(NULL), | 82 _claimed(0), _jmethod_ids(NULL), _handles(NULL), _deallocate_list(NULL), |
79 _next(NULL), _dependencies(dependencies), | 83 _next(NULL), _dependencies(dependencies), |
80 _metaspace_lock(new Mutex(Monitor::leaf+1, "Metaspace allocation lock", true)) { | 84 _metaspace_lock(new Mutex(Monitor::leaf+1, "Metaspace allocation lock", true)) { |
81 // empty | 85 // empty |
315 } | 319 } |
316 tty->print_cr("]"); | 320 tty->print_cr("]"); |
317 } | 321 } |
318 } | 322 } |
319 | 323 |
324 oop ClassLoaderData::keep_alive_object() const { | |
325 assert(!keep_alive(), "Don't use with CLDs that are artificially kept alive"); | |
326 return is_anonymous() ? _klasses->java_mirror() : class_loader(); | |
327 } | |
328 | |
320 bool ClassLoaderData::is_alive(BoolObjectClosure* is_alive_closure) const { | 329 bool ClassLoaderData::is_alive(BoolObjectClosure* is_alive_closure) const { |
321 bool alive = | 330 bool alive = keep_alive() // null class loader and incomplete anonymous klasses. |
322 is_anonymous() ? | 331 || is_alive_closure->do_object_b(keep_alive_object()); |
323 is_alive_closure->do_object_b(_klasses->java_mirror()) : | 332 |
324 class_loader() == NULL || is_alive_closure->do_object_b(class_loader()); | |
325 assert(!alive || claimed(), "must be claimed"); | 333 assert(!alive || claimed(), "must be claimed"); |
326 return alive; | 334 return alive; |
327 } | 335 } |
328 | 336 |
329 | 337 |
589 } | 597 } |
590 } | 598 } |
591 | 599 |
592 void ClassLoaderDataGraph::always_strong_oops_do(OopClosure* f, KlassClosure* klass_closure, bool must_claim) { | 600 void ClassLoaderDataGraph::always_strong_oops_do(OopClosure* f, KlassClosure* klass_closure, bool must_claim) { |
593 if (ClassUnloading) { | 601 if (ClassUnloading) { |
594 ClassLoaderData::the_null_class_loader_data()->oops_do(f, klass_closure, must_claim); | |
595 // keep any special CLDs alive. | |
596 ClassLoaderDataGraph::keep_alive_oops_do(f, klass_closure, must_claim); | 602 ClassLoaderDataGraph::keep_alive_oops_do(f, klass_closure, must_claim); |
597 } else { | 603 } else { |
598 ClassLoaderDataGraph::oops_do(f, klass_closure, must_claim); | 604 ClassLoaderDataGraph::oops_do(f, klass_closure, must_claim); |
599 } | 605 } |
600 } | 606 } |
696 // mark metadata seen on the stack and code cache so we can delete | 702 // mark metadata seen on the stack and code cache so we can delete |
697 // unneeded entries. | 703 // unneeded entries. |
698 bool has_redefined_a_class = JvmtiExport::has_redefined_a_class(); | 704 bool has_redefined_a_class = JvmtiExport::has_redefined_a_class(); |
699 MetadataOnStackMark md_on_stack; | 705 MetadataOnStackMark md_on_stack; |
700 while (data != NULL) { | 706 while (data != NULL) { |
701 if (data->keep_alive() || data->is_alive(is_alive_closure)) { | 707 if (data->is_alive(is_alive_closure)) { |
702 if (has_redefined_a_class) { | 708 if (has_redefined_a_class) { |
703 data->classes_do(InstanceKlass::purge_previous_versions); | 709 data->classes_do(InstanceKlass::purge_previous_versions); |
704 } | 710 } |
705 data->free_deallocate_list(); | 711 data->free_deallocate_list(); |
706 prev = data; | 712 prev = data; |