--- old/src/share/vm/classfile/classLoaderData.hpp 2017-07-18 22:53:34.126462489 -0400 +++ new/src/share/vm/classfile/classLoaderData.hpp 2017-07-18 22:53:33.881079502 -0400 @@ -46,9 +46,8 @@ // used by the dynamic linker to allocate the runtime representation of all // the types it defines. // -// ClassLoaderData are stored in the runtime representation of classes and the -// system dictionary, are roots of garbage collection, and provides iterators -// for root tracing and other GC operations. +// ClassLoaderData are stored in the runtime representation of classes, +// and provides iterators for root tracing and other GC operations. class ClassLoaderData; class JNIMethodBlock; @@ -57,6 +56,8 @@ class PackageEntry; class ModuleEntryTable; class PackageEntryTable; +class DictionaryEntry; +class Dictionary; // GC root for walking class loader data created @@ -64,6 +65,7 @@ friend class ClassLoaderData; friend class ClassLoaderDataGraphMetaspaceIterator; friend class ClassLoaderDataGraphKlassIteratorAtomic; + friend class ClassLoaderDataGraphKlassIteratorStatic; friend class VMStructs; private: // All CLDs (except the null CLD) can be reached by walking _head->_next->... @@ -109,6 +111,22 @@ static void classes_unloading_do(void f(Klass* const)); static bool do_unloading(BoolObjectClosure* is_alive, bool clean_previous_versions); + // dictionary do + // Iterate over all klasses in dictionary, but + // just the classes from defining class loaders. + static void dictionary_classes_do(void f(InstanceKlass*)); + // Added for initialize_itable_for_klass to handle exceptions. + static void dictionary_classes_do(void f(InstanceKlass*, TRAPS), TRAPS); + + // Iterate all classes and their class loaders, including initiating class loaders. + static void dictionary_all_entries_do(void f(InstanceKlass*, ClassLoaderData*)); + + // VM_CounterDecay iteration support + static InstanceKlass* try_get_next_class(); + + static void verify_dictionary(); + static void print_dictionary(bool details); + // CMS support. static void remember_new_clds(bool remember) { _saved_head = (remember ? _head : NULL); } static GrowableArray* new_clds(); @@ -193,6 +211,7 @@ friend class ClassLoaderDataGraph; friend class ClassLoaderDataGraphKlassIteratorAtomic; + friend class ClassLoaderDataGraphKlassIteratorStatic; friend class ClassLoaderDataGraphMetaspaceIterator; friend class MetaDataFactory; friend class Method; @@ -221,8 +240,9 @@ Klass* volatile _klasses; // The classes defined by the class loader. PackageEntryTable* volatile _packages; // The packages defined by the class loader. + ModuleEntryTable* volatile _modules; // The modules defined by the class loader. ModuleEntry* _unnamed_module; // This class loader's unnamed module. - ModuleEntryTable* volatile _modules; // The modules defined by the class loader. + Dictionary* _dictionary; // The loaded InstanceKlasses, including initiated by this class loader // These method IDs are created for the class loader and set to NULL when the // class loader is unloaded. They are rarely freed, only for redefine classes @@ -269,6 +289,7 @@ // Allocate out of this class loader data MetaWord* allocate(size_t size); + Dictionary* create_dictionary(); public: bool is_alive(BoolObjectClosure* is_alive_closure) const; @@ -324,17 +345,20 @@ void inc_keep_alive(); void dec_keep_alive(); - inline unsigned int identity_hash() const; + inline unsigned int identity_hash() const { return (unsigned int)(((intptr_t)this) >> 3); } // Used when tracing from klasses. void oops_do(OopClosure* f, KlassClosure* klass_closure, bool must_claim); void classes_do(KlassClosure* klass_closure); + Klass* klasses() { return _klasses; } JNIMethodBlock* jmethod_ids() const { return _jmethod_ids; } void set_jmethod_ids(JNIMethodBlock* new_block) { _jmethod_ids = new_block; } - void print_value() { print_value_on(tty); } + void print() { print_on(tty); } + void print_on(outputStream* out) const; + void print_value() { print_value_on(tty); } void print_value_on(outputStream* out) const; void dump(outputStream * const out) PRODUCT_RETURN; void verify(); @@ -352,6 +376,9 @@ ModuleEntryTable* modules(); bool modules_defined() { return (_modules != NULL); } + // Loaded class dictionary + Dictionary* dictionary() const { return _dictionary; } + void add_to_deallocate_list(Metadata* m); static ClassLoaderData* class_loader_data(oop loader);