--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/share/vm/classfile/systemDictionary.hpp Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,581 @@
+/*
+ * Copyright 1997-2007 Sun Microsystems, Inc. All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ */
+
+// The system dictionary stores all loaded classes and maps:
+//
+// [class name,class loader] -> class i.e. [symbolOop,oop] -> klassOop
+//
+// Classes are loaded lazily. The default VM class loader is
+// represented as NULL.
+
+// The underlying data structure is an open hash table with a fixed number
+// of buckets. During loading the loader object is locked, (for the VM loader
+// a private lock object is used). Class loading can thus be done concurrently,
+// but only by different loaders.
+//
+// During loading a placeholder (name, loader) is temporarily placed in
+// a side data structure, and is used to detect ClassCircularityErrors
+// and to perform verification during GC. A GC can occur in the midst
+// of class loading, as we call out to Java, have to take locks, etc.
+//
+// When class loading is finished, a new entry is added to the system
+// dictionary and the place holder is removed. Note that the protection
+// domain field of the system dictionary has not yet been filled in when
+// the "real" system dictionary entry is created.
+//
+// Clients of this class who are interested in finding if a class has
+// been completely loaded -- not classes in the process of being loaded --
+// can read the SystemDictionary unlocked. This is safe because
+// - entries are only deleted at safepoints
+// - readers cannot come to a safepoint while actively examining
+// an entry (an entry cannot be deleted from under a reader)
+// - entries must be fully formed before they are available to concurrent
+// readers (we must ensure write ordering)
+//
+// Note that placeholders are deleted at any time, as they are removed
+// when a class is completely loaded. Therefore, readers as well as writers
+// of placeholders must hold the SystemDictionary_lock.
+//
+
+class Dictionary;
+class PlaceholderTable;
+class LoaderConstraintTable;
+class HashtableBucket;
+class ResolutionErrorTable;
+
+class SystemDictionary : AllStatic {
+ friend class VMStructs;
+ friend class CompactingPermGenGen;
+ NOT_PRODUCT(friend class instanceKlassKlass;)
+
+ public:
+ // Returns a class with a given class name and class loader. Loads the
+ // class if needed. If not found a NoClassDefFoundError or a
+ // ClassNotFoundException is thrown, depending on the value on the
+ // throw_error flag. For most uses the throw_error argument should be set
+ // to true.
+
+ static klassOop resolve_or_fail(symbolHandle class_name, Handle class_loader, Handle protection_domain, bool throw_error, TRAPS);
+ // Convenient call for null loader and protection domain.
+ static klassOop resolve_or_fail(symbolHandle class_name, bool throw_error, TRAPS);
+private:
+ // handle error translation for resolve_or_null results
+ static klassOop handle_resolution_exception(symbolHandle class_name, Handle class_loader, Handle protection_domain, bool throw_error, KlassHandle klass_h, TRAPS);
+
+public:
+
+ // Returns a class with a given class name and class loader.
+ // Loads the class if needed. If not found NULL is returned.
+ static klassOop resolve_or_null(symbolHandle class_name, Handle class_loader, Handle protection_domain, TRAPS);
+ // Version with null loader and protection domain
+ static klassOop resolve_or_null(symbolHandle class_name, TRAPS);
+
+ // Resolve a superclass or superinterface. Called from ClassFileParser,
+ // parse_interfaces, resolve_instance_class_or_null, load_shared_class
+ // "child_name" is the class whose super class or interface is being resolved.
+ static klassOop resolve_super_or_fail(symbolHandle child_name,
+ symbolHandle class_name,
+ Handle class_loader,
+ Handle protection_domain,
+ bool is_superclass,
+ TRAPS);
+
+ // Parse new stream. This won't update the system dictionary or
+ // class hierarchy, simply parse the stream. Used by JVMTI RedefineClasses.
+ static klassOop parse_stream(symbolHandle class_name,
+ Handle class_loader,
+ Handle protection_domain,
+ ClassFileStream* st,
+ TRAPS);
+
+ // Resolve from stream (called by jni_DefineClass and JVM_DefineClass)
+ static klassOop resolve_from_stream(symbolHandle class_name, Handle class_loader, Handle protection_domain, ClassFileStream* st, TRAPS);
+
+ // Lookup an already loaded class. If not found NULL is returned.
+ static klassOop find(symbolHandle class_name, Handle class_loader, Handle protection_domain, TRAPS);
+
+ // Lookup an already loaded instance or array class.
+ // Do not make any queries to class loaders; consult only the cache.
+ // If not found NULL is returned.
+ static klassOop find_instance_or_array_klass(symbolHandle class_name,
+ Handle class_loader,
+ Handle protection_domain,
+ TRAPS);
+
+ // Lookup an instance or array class that has already been loaded
+ // either into the given class loader, or else into another class
+ // loader that is constrained (via loader constraints) to produce
+ // a consistent class. Do not take protection domains into account.
+ // Do not make any queries to class loaders; consult only the cache.
+ // Return NULL if the class is not found.
+ //
+ // This function is a strict superset of find_instance_or_array_klass.
+ // This function (the unchecked version) makes a conservative prediction
+ // of the result of the checked version, assuming successful lookup.
+ // If both functions return non-null, they must return the same value.
+ // Also, the unchecked version may sometimes be non-null where the
+ // checked version is null. This can occur in several ways:
+ // 1. No query has yet been made to the class loader.
+ // 2. The class loader was queried, but chose not to delegate.
+ // 3. ClassLoader.checkPackageAccess rejected a proposed protection domain.
+ // 4. Loading was attempted, but there was a linkage error of some sort.
+ // In all of these cases, the loader constraints on this type are
+ // satisfied, and it is safe for classes in the given class loader
+ // to manipulate strongly-typed values of the found class, subject
+ // to local linkage and access checks.
+ static klassOop find_constrained_instance_or_array_klass(symbolHandle class_name,
+ Handle class_loader,
+ TRAPS);
+
+ // Iterate over all klasses in dictionary
+ // Just the classes from defining class loaders
+ static void classes_do(void f(klassOop));
+ // Added for initialize_itable_for_klass to handle exceptions
+ static void classes_do(void f(klassOop, TRAPS), TRAPS);
+ // All classes, and their class loaders
+ static void classes_do(void f(klassOop, oop));
+ // All classes, and their class loaders
+ // (added for helpers that use HandleMarks and ResourceMarks)
+ static void classes_do(void f(klassOop, oop, TRAPS), TRAPS);
+ // All entries in the placeholder table and their class loaders
+ static void placeholders_do(void f(symbolOop, oop));
+
+ // Iterate over all methods in all klasses in dictionary
+ static void methods_do(void f(methodOop));
+
+ // Garbage collection support
+
+ // This method applies "blk->do_oop" to all the pointers to "system"
+ // classes and loaders.
+ static void always_strong_oops_do(OopClosure* blk);
+ static void always_strong_classes_do(OopClosure* blk);
+ // This method applies "blk->do_oop" to all the placeholders.
+ static void placeholders_do(OopClosure* blk);
+
+ // Unload (that is, break root links to) all unmarked classes and
+ // loaders. Returns "true" iff something was unloaded.
+ static bool do_unloading(BoolObjectClosure* is_alive);
+
+ // Applies "f->do_oop" to all root oops in the system dictionary.
+ static void oops_do(OopClosure* f);
+
+ // System loader lock
+ static oop system_loader_lock() { return _system_loader_lock_obj; }
+
+private:
+ // Traverses preloaded oops: various system classes. These are
+ // guaranteed to be in the perm gen.
+ static void preloaded_oops_do(OopClosure* f);
+ static void lazily_loaded_oops_do(OopClosure* f);
+
+public:
+ // Sharing support.
+ static void reorder_dictionary();
+ static void copy_buckets(char** top, char* end);
+ static void copy_table(char** top, char* end);
+ static void reverse();
+ static void set_shared_dictionary(HashtableBucket* t, int length,
+ int number_of_entries);
+ // Printing
+ static void print() PRODUCT_RETURN;
+ static void print_class_statistics() PRODUCT_RETURN;
+ static void print_method_statistics() PRODUCT_RETURN;
+
+ // Number of contained klasses
+ // This is both fully loaded classes and classes in the process
+ // of being loaded
+ static int number_of_classes();
+
+ // Monotonically increasing counter which grows as classes are
+ // loaded or modifications such as hot-swapping or setting/removing
+ // of breakpoints are performed
+ static inline int number_of_modifications() { assert_locked_or_safepoint(Compile_lock); return _number_of_modifications; }
+ // Needed by evolution and breakpoint code
+ static inline void notice_modification() { assert_locked_or_safepoint(Compile_lock); ++_number_of_modifications; }
+
+ // Verification
+ static void verify();
+
+#ifdef ASSERT
+ static bool is_internal_format(symbolHandle class_name);
+#endif
+
+ // Verify class is in dictionary
+ static void verify_obj_klass_present(Handle obj,
+ symbolHandle class_name,
+ Handle class_loader);
+
+ // Initialization
+ static void initialize(TRAPS);
+
+ // Fast access to commonly used classes (preloaded)
+ static klassOop check_klass(klassOop k) {
+ assert(k != NULL, "preloaded klass not initialized");
+ return k;
+ }
+
+public:
+ static klassOop object_klass() { return check_klass(_object_klass); }
+ static klassOop string_klass() { return check_klass(_string_klass); }
+ static klassOop class_klass() { return check_klass(_class_klass); }
+ static klassOop cloneable_klass() { return check_klass(_cloneable_klass); }
+ static klassOop classloader_klass() { return check_klass(_classloader_klass); }
+ static klassOop serializable_klass() { return check_klass(_serializable_klass); }
+ static klassOop system_klass() { return check_klass(_system_klass); }
+
+ static klassOop throwable_klass() { return check_klass(_throwable_klass); }
+ static klassOop error_klass() { return check_klass(_error_klass); }
+ static klassOop threaddeath_klass() { return check_klass(_threaddeath_klass); }
+ static klassOop exception_klass() { return check_klass(_exception_klass); }
+ static klassOop runtime_exception_klass() { return check_klass(_runtime_exception_klass); }
+ static klassOop classNotFoundException_klass() { return check_klass(_classNotFoundException_klass); }
+ static klassOop noClassDefFoundError_klass() { return check_klass(_noClassDefFoundError_klass); }
+ static klassOop linkageError_klass() { return check_klass(_linkageError_klass); }
+ static klassOop ClassCastException_klass() { return check_klass(_classCastException_klass); }
+ static klassOop ArrayStoreException_klass() { return check_klass(_arrayStoreException_klass); }
+ static klassOop virtualMachineError_klass() { return check_klass(_virtualMachineError_klass); }
+ static klassOop OutOfMemoryError_klass() { return check_klass(_outOfMemoryError_klass); }
+ static klassOop StackOverflowError_klass() { return check_klass(_StackOverflowError_klass); }
+ static klassOop IllegalMonitorStateException_klass() { return check_klass(_illegalMonitorStateException_klass); }
+ static klassOop protectionDomain_klass() { return check_klass(_protectionDomain_klass); }
+ static klassOop AccessControlContext_klass() { return check_klass(_AccessControlContext_klass); }
+ static klassOop reference_klass() { return check_klass(_reference_klass); }
+ static klassOop soft_reference_klass() { return check_klass(_soft_reference_klass); }
+ static klassOop weak_reference_klass() { return check_klass(_weak_reference_klass); }
+ static klassOop final_reference_klass() { return check_klass(_final_reference_klass); }
+ static klassOop phantom_reference_klass() { return check_klass(_phantom_reference_klass); }
+ static klassOop finalizer_klass() { return check_klass(_finalizer_klass); }
+
+ static klassOop thread_klass() { return check_klass(_thread_klass); }
+ static klassOop threadGroup_klass() { return check_klass(_threadGroup_klass); }
+ static klassOop properties_klass() { return check_klass(_properties_klass); }
+ static klassOop reflect_accessible_object_klass() { return check_klass(_reflect_accessible_object_klass); }
+ static klassOop reflect_field_klass() { return check_klass(_reflect_field_klass); }
+ static klassOop reflect_method_klass() { return check_klass(_reflect_method_klass); }
+ static klassOop reflect_constructor_klass() { return check_klass(_reflect_constructor_klass); }
+ static klassOop reflect_method_accessor_klass() {
+ assert(JDK_Version::is_gte_jdk14x_version() && UseNewReflection, "JDK 1.4 only");
+ return check_klass(_reflect_method_accessor_klass);
+ }
+ static klassOop reflect_constructor_accessor_klass() {
+ assert(JDK_Version::is_gte_jdk14x_version() && UseNewReflection, "JDK 1.4 only");
+ return check_klass(_reflect_constructor_accessor_klass);
+ }
+ // NOTE: needed too early in bootstrapping process to have checks based on JDK version
+ static klassOop reflect_magic_klass() { return _reflect_magic_klass; }
+ static klassOop reflect_delegating_classloader_klass() { return _reflect_delegating_classloader_klass; }
+ static klassOop reflect_constant_pool_klass() {
+ assert(JDK_Version::is_gte_jdk15x_version(), "JDK 1.5 only");
+ return _reflect_constant_pool_klass;
+ }
+ static klassOop reflect_unsafe_static_field_accessor_impl_klass() {
+ assert(JDK_Version::is_gte_jdk15x_version(), "JDK 1.5 only");
+ return _reflect_unsafe_static_field_accessor_impl_klass;
+ }
+
+ static klassOop vector_klass() { return check_klass(_vector_klass); }
+ static klassOop hashtable_klass() { return check_klass(_hashtable_klass); }
+ static klassOop stringBuffer_klass() { return check_klass(_stringBuffer_klass); }
+ static klassOop stackTraceElement_klass() { return check_klass(_stackTraceElement_klass); }
+
+ static klassOop java_nio_Buffer_klass() { return check_klass(_java_nio_Buffer_klass); }
+
+ static klassOop sun_misc_AtomicLongCSImpl_klass() { return _sun_misc_AtomicLongCSImpl_klass; }
+
+ // To support incremental JRE downloads (KERNEL JRE). Null if not present.
+ static klassOop sun_jkernel_DownloadManager_klass() { return _sun_jkernel_DownloadManager_klass; }
+
+ static klassOop boolean_klass() { return check_klass(_boolean_klass); }
+ static klassOop char_klass() { return check_klass(_char_klass); }
+ static klassOop float_klass() { return check_klass(_float_klass); }
+ static klassOop double_klass() { return check_klass(_double_klass); }
+ static klassOop byte_klass() { return check_klass(_byte_klass); }
+ static klassOop short_klass() { return check_klass(_short_klass); }
+ static klassOop int_klass() { return check_klass(_int_klass); }
+ static klassOop long_klass() { return check_klass(_long_klass); }
+
+ static klassOop box_klass(BasicType t) {
+ assert((uint)t < T_VOID+1, "range check");
+ return check_klass(_box_klasses[t]);
+ }
+ static BasicType box_klass_type(klassOop k); // inverse of box_klass
+
+ // methods returning lazily loaded klasses
+ // The corresponding method to load the class must be called before calling them.
+ static klassOop abstract_ownable_synchronizer_klass() { return check_klass(_abstract_ownable_synchronizer_klass); }
+
+ static void load_abstract_ownable_synchronizer_klass(TRAPS);
+
+private:
+ // Tells whether ClassLoader.loadClassInternal is present
+ static bool has_loadClassInternal() { return _has_loadClassInternal; }
+
+public:
+ // Tells whether ClassLoader.checkPackageAccess is present
+ static bool has_checkPackageAccess() { return _has_checkPackageAccess; }
+
+ static bool class_klass_loaded() { return _class_klass != NULL; }
+ static bool cloneable_klass_loaded() { return _cloneable_klass != NULL; }
+
+ // Returns default system loader
+ static oop java_system_loader();
+
+ // Compute the default system loader
+ static void compute_java_system_loader(TRAPS);
+
+private:
+ // Mirrors for primitive classes (created eagerly)
+ static oop check_mirror(oop m) {
+ assert(m != NULL, "mirror not initialized");
+ return m;
+ }
+
+public:
+ // Note: java_lang_Class::primitive_type is the inverse of java_mirror
+
+ // Check class loader constraints
+ static bool add_loader_constraint(symbolHandle name, Handle loader1,
+ Handle loader2, TRAPS);
+ static char* check_signature_loaders(symbolHandle signature, Handle loader1,
+ Handle loader2, bool is_method, TRAPS);
+
+ // Utility for printing loader "name" as part of tracing constraints
+ static const char* loader_name(oop loader) {
+ return ((loader) == NULL ? "<bootloader>" :
+ instanceKlass::cast((loader)->klass())->name()->as_C_string() );
+ }
+
+ // Record the error when the first attempt to resolve a reference from a constant
+ // pool entry to a class fails.
+ static void add_resolution_error(constantPoolHandle pool, int which, symbolHandle error);
+ static symbolOop find_resolution_error(constantPoolHandle pool, int which);
+
+ private:
+
+ enum Constants {
+ _loader_constraint_size = 107, // number of entries in constraint table
+ _resolution_error_size = 107, // number of entries in resolution error table
+ _nof_buckets = 1009 // number of buckets in hash table
+ };
+
+
+ // Static variables
+
+ // Hashtable holding loaded classes.
+ static Dictionary* _dictionary;
+
+ // Hashtable holding placeholders for classes being loaded.
+ static PlaceholderTable* _placeholders;
+
+ // Hashtable holding classes from the shared archive.
+ static Dictionary* _shared_dictionary;
+
+ // Monotonically increasing counter which grows with
+ // _number_of_classes as well as hot-swapping and breakpoint setting
+ // and removal.
+ static int _number_of_modifications;
+
+ // Lock object for system class loader
+ static oop _system_loader_lock_obj;
+
+ // Constraints on class loaders
+ static LoaderConstraintTable* _loader_constraints;
+
+ // Resolution errors
+ static ResolutionErrorTable* _resolution_errors;
+
+public:
+ // for VM_CounterDecay iteration support
+ friend class CounterDecay;
+ static klassOop try_get_next_class();
+
+private:
+ static void validate_protection_domain(instanceKlassHandle klass,
+ Handle class_loader,
+ Handle protection_domain, TRAPS);
+
+ friend class VM_PopulateDumpSharedSpace;
+ friend class TraversePlaceholdersClosure;
+ static Dictionary* dictionary() { return _dictionary; }
+ static Dictionary* shared_dictionary() { return _shared_dictionary; }
+ static PlaceholderTable* placeholders() { return _placeholders; }
+ static LoaderConstraintTable* constraints() { return _loader_constraints; }
+ static ResolutionErrorTable* resolution_errors() { return _resolution_errors; }
+
+ // Basic loading operations
+ static klassOop resolve_instance_class_or_null(symbolHandle class_name, Handle class_loader, Handle protection_domain, TRAPS);
+ static klassOop resolve_array_class_or_null(symbolHandle class_name, Handle class_loader, Handle protection_domain, TRAPS);
+ static instanceKlassHandle handle_parallel_super_load(symbolHandle class_name, symbolHandle supername, Handle class_loader, Handle protection_domain, Handle lockObject, TRAPS);
+ // Wait on SystemDictionary_lock; unlocks lockObject before
+ // waiting; relocks lockObject with correct recursion count
+ // after waiting, but before reentering SystemDictionary_lock
+ // to preserve lock order semantics.
+ static void double_lock_wait(Handle lockObject, TRAPS);
+ static void define_instance_class(instanceKlassHandle k, TRAPS);
+ static instanceKlassHandle find_or_define_instance_class(symbolHandle class_name,
+ Handle class_loader,
+ instanceKlassHandle k, TRAPS);
+ static instanceKlassHandle load_shared_class(symbolHandle class_name,
+ Handle class_loader, TRAPS);
+ static instanceKlassHandle load_shared_class(instanceKlassHandle ik,
+ Handle class_loader, TRAPS);
+ static instanceKlassHandle load_instance_class(symbolHandle class_name, Handle class_loader, TRAPS);
+ static Handle compute_loader_lock_object(Handle class_loader, TRAPS);
+ static void check_loader_lock_contention(Handle loader_lock, TRAPS);
+
+ static klassOop find_shared_class(symbolHandle class_name);
+
+ // Setup link to hierarchy
+ static void add_to_hierarchy(instanceKlassHandle k, TRAPS);
+
+private:
+ // We pass in the hashtable index so we can calculate it outside of
+ // the SystemDictionary_lock.
+
+ // Basic find on loaded classes
+ static klassOop find_class(int index, unsigned int hash,
+ symbolHandle name, Handle loader);
+
+ // Basic find on classes in the midst of being loaded
+ static symbolOop find_placeholder(int index, unsigned int hash,
+ symbolHandle name, Handle loader);
+
+ // Basic find operation of loaded classes and classes in the midst
+ // of loading; used for assertions and verification only.
+ static oop find_class_or_placeholder(symbolHandle class_name,
+ Handle class_loader);
+
+ // Updating entry in dictionary
+ // Add a completely loaded class
+ static void add_klass(int index, symbolHandle class_name,
+ Handle class_loader, KlassHandle obj);
+
+ // Add a placeholder for a class being loaded
+ static void add_placeholder(int index,
+ symbolHandle class_name,
+ Handle class_loader);
+ static void remove_placeholder(int index,
+ symbolHandle class_name,
+ Handle class_loader);
+
+ // Performs cleanups after resolve_super_or_fail. This typically needs
+ // to be called on failure.
+ // Won't throw, but can block.
+ static void resolution_cleanups(symbolHandle class_name,
+ Handle class_loader,
+ TRAPS);
+
+ // Initialization
+ static void initialize_preloaded_classes(TRAPS);
+
+ // Class loader constraints
+ static void check_constraints(int index, unsigned int hash,
+ instanceKlassHandle k, Handle loader,
+ bool defining, TRAPS);
+ static void update_dictionary(int d_index, unsigned int d_hash,
+ int p_index, unsigned int p_hash,
+ instanceKlassHandle k, Handle loader, TRAPS);
+
+ // Variables holding commonly used klasses (preloaded)
+ static klassOop _object_klass;
+ static klassOop _string_klass;
+ static klassOop _class_klass;
+ static klassOop _cloneable_klass;
+ static klassOop _classloader_klass;
+ static klassOop _serializable_klass;
+ static klassOop _system_klass;
+
+ static klassOop _throwable_klass;
+ static klassOop _error_klass;
+ static klassOop _threaddeath_klass;
+ static klassOop _exception_klass;
+ static klassOop _runtime_exception_klass;
+ static klassOop _classNotFoundException_klass;
+ static klassOop _noClassDefFoundError_klass;
+ static klassOop _linkageError_klass;
+ static klassOop _classCastException_klass;
+ static klassOop _arrayStoreException_klass;
+ static klassOop _virtualMachineError_klass;
+ static klassOop _outOfMemoryError_klass;
+ static klassOop _StackOverflowError_klass;
+ static klassOop _illegalMonitorStateException_klass;
+ static klassOop _protectionDomain_klass;
+ static klassOop _AccessControlContext_klass;
+ static klassOop _reference_klass;
+ static klassOop _soft_reference_klass;
+ static klassOop _weak_reference_klass;
+ static klassOop _final_reference_klass;
+ static klassOop _phantom_reference_klass;
+ static klassOop _finalizer_klass;
+
+ static klassOop _thread_klass;
+ static klassOop _threadGroup_klass;
+ static klassOop _properties_klass;
+ static klassOop _reflect_accessible_object_klass;
+ static klassOop _reflect_field_klass;
+ static klassOop _reflect_method_klass;
+ static klassOop _reflect_constructor_klass;
+ // 1.4 reflection implementation
+ static klassOop _reflect_magic_klass;
+ static klassOop _reflect_method_accessor_klass;
+ static klassOop _reflect_constructor_accessor_klass;
+ static klassOop _reflect_delegating_classloader_klass;
+ // 1.5 annotations implementation
+ static klassOop _reflect_constant_pool_klass;
+ static klassOop _reflect_unsafe_static_field_accessor_impl_klass;
+
+ static klassOop _stringBuffer_klass;
+ static klassOop _vector_klass;
+ static klassOop _hashtable_klass;
+
+ static klassOop _stackTraceElement_klass;
+
+ static klassOop _java_nio_Buffer_klass;
+
+ static klassOop _sun_misc_AtomicLongCSImpl_klass;
+
+ // KERNEL JRE support.
+ static klassOop _sun_jkernel_DownloadManager_klass;
+
+ // Lazily loaded klasses
+ static volatile klassOop _abstract_ownable_synchronizer_klass;
+
+ // Box klasses
+ static klassOop _boolean_klass;
+ static klassOop _char_klass;
+ static klassOop _float_klass;
+ static klassOop _double_klass;
+ static klassOop _byte_klass;
+ static klassOop _short_klass;
+ static klassOop _int_klass;
+ static klassOop _long_klass;
+
+ // table of same
+ static klassOop _box_klasses[T_VOID+1];
+
+ static oop _java_system_loader;
+
+ static bool _has_loadClassInternal;
+ static bool _has_checkPackageAccess;
+};