aoqi@0: /* aoqi@0: * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved. aoqi@0: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. aoqi@0: * aoqi@0: * This code is free software; you can redistribute it and/or modify it aoqi@0: * under the terms of the GNU General Public License version 2 only, as aoqi@0: * published by the Free Software Foundation. aoqi@0: * aoqi@0: * This code is distributed in the hope that it will be useful, but WITHOUT aoqi@0: * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or aoqi@0: * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License aoqi@0: * version 2 for more details (a copy is included in the LICENSE file that aoqi@0: * accompanied this code). aoqi@0: * aoqi@0: * You should have received a copy of the GNU General Public License version aoqi@0: * 2 along with this work; if not, write to the Free Software Foundation, aoqi@0: * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. aoqi@0: * aoqi@0: * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA aoqi@0: * or visit www.oracle.com if you need additional information or have any aoqi@0: * questions. aoqi@0: * aoqi@0: */ aoqi@0: aoqi@0: #ifndef SHARE_VM_OOPS_INSTANCEKLASS_HPP aoqi@0: #define SHARE_VM_OOPS_INSTANCEKLASS_HPP aoqi@0: aoqi@0: #include "classfile/classLoaderData.hpp" aoqi@0: #include "memory/referenceType.hpp" aoqi@0: #include "oops/annotations.hpp" aoqi@0: #include "oops/constMethod.hpp" aoqi@0: #include "oops/fieldInfo.hpp" aoqi@0: #include "oops/instanceOop.hpp" aoqi@0: #include "oops/klassVtable.hpp" aoqi@0: #include "runtime/atomic.hpp" aoqi@0: #include "runtime/handles.hpp" aoqi@0: #include "runtime/os.hpp" aoqi@0: #include "utilities/accessFlags.hpp" aoqi@0: #include "utilities/bitMap.inline.hpp" aoqi@0: #include "utilities/macros.hpp" aoqi@0: #include "trace/traceMacros.hpp" aoqi@0: aoqi@0: // An InstanceKlass is the VM level representation of a Java class. aoqi@0: // It contains all information needed for at class at execution runtime. aoqi@0: aoqi@0: // InstanceKlass layout: aoqi@0: // [C++ vtbl pointer ] Klass aoqi@0: // [subtype cache ] Klass aoqi@0: // [instance size ] Klass aoqi@0: // [java mirror ] Klass aoqi@0: // [super ] Klass aoqi@0: // [access_flags ] Klass aoqi@0: // [name ] Klass aoqi@0: // [first subklass ] Klass aoqi@0: // [next sibling ] Klass aoqi@0: // [array klasses ] aoqi@0: // [methods ] aoqi@0: // [local interfaces ] aoqi@0: // [transitive interfaces ] aoqi@0: // [fields ] aoqi@0: // [constants ] aoqi@0: // [class loader ] aoqi@0: // [source file name ] aoqi@0: // [inner classes ] aoqi@0: // [static field size ] aoqi@0: // [nonstatic field size ] aoqi@0: // [static oop fields size ] aoqi@0: // [nonstatic oop maps size ] aoqi@0: // [has finalize method ] aoqi@0: // [deoptimization mark bit ] aoqi@0: // [initialization state ] aoqi@0: // [initializing thread ] aoqi@0: // [Java vtable length ] aoqi@0: // [oop map cache (stack maps) ] aoqi@0: // [EMBEDDED Java vtable ] size in words = vtable_len aoqi@0: // [EMBEDDED nonstatic oop-map blocks] size in words = nonstatic_oop_map_size aoqi@0: // The embedded nonstatic oop-map blocks are short pairs (offset, length) aoqi@0: // indicating where oops are located in instances of this klass. aoqi@0: // [EMBEDDED implementor of the interface] only exist for interface aoqi@0: // [EMBEDDED host klass ] only exist for an anonymous class (JSR 292 enabled) aoqi@0: aoqi@0: aoqi@0: // forward declaration for class -- see below for definition aoqi@0: class SuperTypeClosure; aoqi@0: class JNIid; aoqi@0: class jniIdMapBase; aoqi@0: class BreakpointInfo; aoqi@0: class fieldDescriptor; aoqi@0: class DepChange; aoqi@0: class nmethodBucket; aoqi@0: class PreviousVersionNode; aoqi@0: class JvmtiCachedClassFieldMap; aoqi@0: class MemberNameTable; aoqi@0: aoqi@0: // This is used in iterators below. aoqi@0: class FieldClosure: public StackObj { aoqi@0: public: aoqi@0: virtual void do_field(fieldDescriptor* fd) = 0; aoqi@0: }; aoqi@0: aoqi@0: #ifndef PRODUCT aoqi@0: // Print fields. aoqi@0: // If "obj" argument to constructor is NULL, prints static fields, otherwise prints non-static fields. aoqi@0: class FieldPrinter: public FieldClosure { aoqi@0: oop _obj; aoqi@0: outputStream* _st; aoqi@0: public: aoqi@0: FieldPrinter(outputStream* st, oop obj = NULL) : _obj(obj), _st(st) {} aoqi@0: void do_field(fieldDescriptor* fd); aoqi@0: }; aoqi@0: #endif // !PRODUCT aoqi@0: aoqi@0: // ValueObjs embedded in klass. Describes where oops are located in instances of aoqi@0: // this klass. aoqi@0: class OopMapBlock VALUE_OBJ_CLASS_SPEC { aoqi@0: public: aoqi@0: // Byte offset of the first oop mapped by this block. aoqi@0: int offset() const { return _offset; } aoqi@0: void set_offset(int offset) { _offset = offset; } aoqi@0: aoqi@0: // Number of oops in this block. aoqi@0: uint count() const { return _count; } aoqi@0: void set_count(uint count) { _count = count; } aoqi@0: aoqi@0: // sizeof(OopMapBlock) in HeapWords. aoqi@0: static const int size_in_words() { aoqi@0: return align_size_up(int(sizeof(OopMapBlock)), HeapWordSize) >> aoqi@0: LogHeapWordSize; aoqi@0: } aoqi@0: aoqi@0: private: aoqi@0: int _offset; aoqi@0: uint _count; aoqi@0: }; aoqi@0: aoqi@0: struct JvmtiCachedClassFileData; aoqi@0: aoqi@0: class InstanceKlass: public Klass { aoqi@0: friend class VMStructs; aoqi@0: friend class ClassFileParser; aoqi@0: friend class CompileReplay; aoqi@0: aoqi@0: protected: aoqi@0: // Constructor aoqi@0: InstanceKlass(int vtable_len, aoqi@0: int itable_len, aoqi@0: int static_field_size, aoqi@0: int nonstatic_oop_map_size, aoqi@0: ReferenceType rt, aoqi@0: AccessFlags access_flags, aoqi@0: bool is_anonymous); aoqi@0: public: aoqi@0: static InstanceKlass* allocate_instance_klass( aoqi@0: ClassLoaderData* loader_data, aoqi@0: int vtable_len, aoqi@0: int itable_len, aoqi@0: int static_field_size, aoqi@0: int nonstatic_oop_map_size, aoqi@0: ReferenceType rt, aoqi@0: AccessFlags access_flags, aoqi@0: Symbol* name, aoqi@0: Klass* super_klass, aoqi@0: bool is_anonymous, aoqi@0: TRAPS); aoqi@0: aoqi@0: InstanceKlass() { assert(DumpSharedSpaces || UseSharedSpaces, "only for CDS"); } aoqi@0: aoqi@0: // See "The Java Virtual Machine Specification" section 2.16.2-5 for a detailed description aoqi@0: // of the class loading & initialization procedure, and the use of the states. aoqi@0: enum ClassState { aoqi@0: allocated, // allocated (but not yet linked) aoqi@0: loaded, // loaded and inserted in class hierarchy (but not linked yet) aoqi@0: linked, // successfully linked/verified (but not initialized yet) aoqi@0: being_initialized, // currently running class initializer aoqi@0: fully_initialized, // initialized (successfull final state) aoqi@0: initialization_error // error happened during initialization aoqi@0: }; aoqi@0: aoqi@0: static int number_of_instance_classes() { return _total_instanceKlass_count; } aoqi@0: aoqi@0: private: aoqi@0: static volatile int _total_instanceKlass_count; aoqi@0: aoqi@0: protected: aoqi@0: // Annotations for this class aoqi@0: Annotations* _annotations; aoqi@0: // Array classes holding elements of this class. aoqi@0: Klass* _array_klasses; aoqi@0: // Constant pool for this class. aoqi@0: ConstantPool* _constants; aoqi@0: // The InnerClasses attribute and EnclosingMethod attribute. The aoqi@0: // _inner_classes is an array of shorts. If the class has InnerClasses aoqi@0: // attribute, then the _inner_classes array begins with 4-tuples of shorts aoqi@0: // [inner_class_info_index, outer_class_info_index, aoqi@0: // inner_name_index, inner_class_access_flags] for the InnerClasses aoqi@0: // attribute. If the EnclosingMethod attribute exists, it occupies the aoqi@0: // last two shorts [class_index, method_index] of the array. If only aoqi@0: // the InnerClasses attribute exists, the _inner_classes array length is aoqi@0: // number_of_inner_classes * 4. If the class has both InnerClasses aoqi@0: // and EnclosingMethod attributes the _inner_classes array length is aoqi@0: // number_of_inner_classes * 4 + enclosing_method_attribute_size. aoqi@0: Array* _inner_classes; aoqi@0: aoqi@0: // the source debug extension for this klass, NULL if not specified. aoqi@0: // Specified as UTF-8 string without terminating zero byte in the classfile, aoqi@0: // it is stored in the instanceklass as a NULL-terminated UTF-8 string aoqi@0: char* _source_debug_extension; aoqi@0: // Array name derived from this class which needs unreferencing aoqi@0: // if this class is unloaded. aoqi@0: Symbol* _array_name; aoqi@0: aoqi@0: // Number of heapOopSize words used by non-static fields in this klass aoqi@0: // (including inherited fields but after header_size()). aoqi@0: int _nonstatic_field_size; aoqi@0: int _static_field_size; // number words used by static fields (oop and non-oop) in this klass aoqi@0: // Constant pool index to the utf8 entry of the Generic signature, aoqi@0: // or 0 if none. aoqi@0: u2 _generic_signature_index; aoqi@0: // Constant pool index to the utf8 entry for the name of source file aoqi@0: // containing this klass, 0 if not specified. aoqi@0: u2 _source_file_name_index; aoqi@0: u2 _static_oop_field_count;// number of static oop fields in this klass aoqi@0: u2 _java_fields_count; // The number of declared Java fields aoqi@0: int _nonstatic_oop_map_size;// size in words of nonstatic oop map blocks aoqi@0: aoqi@0: // _is_marked_dependent can be set concurrently, thus cannot be part of the aoqi@0: // _misc_flags. aoqi@0: bool _is_marked_dependent; // used for marking during flushing and deoptimization aoqi@0: aoqi@0: enum { aoqi@0: _misc_rewritten = 1 << 0, // methods rewritten. aoqi@0: _misc_has_nonstatic_fields = 1 << 1, // for sizing with UseCompressedOops aoqi@0: _misc_should_verify_class = 1 << 2, // allow caching of preverification aoqi@0: _misc_is_anonymous = 1 << 3, // has embedded _host_klass field aoqi@0: _misc_is_contended = 1 << 4, // marked with contended annotation aoqi@0: _misc_has_default_methods = 1 << 5 // class/superclass/implemented interfaces has default methods aoqi@0: }; aoqi@0: u2 _misc_flags; aoqi@0: u2 _minor_version; // minor version number of class file aoqi@0: u2 _major_version; // major version number of class file aoqi@0: Thread* _init_thread; // Pointer to current thread doing initialization (to handle recusive initialization) aoqi@0: int _vtable_len; // length of Java vtable (in words) aoqi@0: int _itable_len; // length of Java itable (in words) aoqi@0: OopMapCache* volatile _oop_map_cache; // OopMapCache for all methods in the klass (allocated lazily) aoqi@0: MemberNameTable* _member_names; // Member names aoqi@0: JNIid* _jni_ids; // First JNI identifier for static fields in this class aoqi@0: jmethodID* _methods_jmethod_ids; // jmethodIDs corresponding to method_idnum, or NULL if none aoqi@0: nmethodBucket* _dependencies; // list of dependent nmethods aoqi@0: nmethod* _osr_nmethods_head; // Head of list of on-stack replacement nmethods for this class aoqi@0: BreakpointInfo* _breakpoints; // bpt lists, managed by Method* aoqi@0: // Array of interesting part(s) of the previous version(s) of this aoqi@0: // InstanceKlass. See PreviousVersionWalker below. aoqi@0: GrowableArray* _previous_versions; aoqi@0: // JVMTI fields can be moved to their own structure - see 6315920 aoqi@0: // JVMTI: cached class file, before retransformable agent modified it in CFLH aoqi@0: JvmtiCachedClassFileData* _cached_class_file; aoqi@0: aoqi@0: volatile u2 _idnum_allocated_count; // JNI/JVMTI: increments with the addition of methods, old ids don't change aoqi@0: aoqi@0: // Class states are defined as ClassState (see above). aoqi@0: // Place the _init_state here to utilize the unused 2-byte after aoqi@0: // _idnum_allocated_count. aoqi@0: u1 _init_state; // state of class aoqi@0: u1 _reference_type; // reference type aoqi@0: aoqi@0: JvmtiCachedClassFieldMap* _jvmti_cached_class_field_map; // JVMTI: used during heap iteration aoqi@0: aoqi@0: NOT_PRODUCT(int _verify_count;) // to avoid redundant verifies aoqi@0: aoqi@0: // Method array. aoqi@0: Array* _methods; aoqi@0: // Default Method Array, concrete methods inherited from interfaces aoqi@0: Array* _default_methods; aoqi@0: // Interface (Klass*s) this class declares locally to implement. aoqi@0: Array* _local_interfaces; aoqi@0: // Interface (Klass*s) this class implements transitively. aoqi@0: Array* _transitive_interfaces; aoqi@0: // Int array containing the original order of method in the class file (for JVMTI). aoqi@0: Array* _method_ordering; aoqi@0: // Int array containing the vtable_indices for default_methods aoqi@0: // offset matches _default_methods offset aoqi@0: Array* _default_vtable_indices; aoqi@0: aoqi@0: // Instance and static variable information, starts with 6-tuples of shorts aoqi@0: // [access, name index, sig index, initval index, low_offset, high_offset] aoqi@0: // for all fields, followed by the generic signature data at the end of aoqi@0: // the array. Only fields with generic signature attributes have the generic aoqi@0: // signature data set in the array. The fields array looks like following: aoqi@0: // aoqi@0: // f1: [access, name index, sig index, initial value index, low_offset, high_offset] aoqi@0: // f2: [access, name index, sig index, initial value index, low_offset, high_offset] aoqi@0: // ... aoqi@0: // fn: [access, name index, sig index, initial value index, low_offset, high_offset] aoqi@0: // [generic signature index] aoqi@0: // [generic signature index] aoqi@0: // ... aoqi@0: Array* _fields; aoqi@0: aoqi@0: // embedded Java vtable follows here aoqi@0: // embedded Java itables follows here aoqi@0: // embedded static fields follows here aoqi@0: // embedded nonstatic oop-map blocks follows here aoqi@0: // embedded implementor of this interface follows here aoqi@0: // The embedded implementor only exists if the current klass is an aoqi@0: // iterface. The possible values of the implementor fall into following aoqi@0: // three cases: aoqi@0: // NULL: no implementor. aoqi@0: // A Klass* that's not itself: one implementor. aoqi@0: // Itself: more than one implementors. aoqi@0: // embedded host klass follows here aoqi@0: // The embedded host klass only exists in an anonymous class for aoqi@0: // dynamic language support (JSR 292 enabled). The host class grants aoqi@0: // its access privileges to this class also. The host class is either aoqi@0: // named, or a previously loaded anonymous class. A non-anonymous class aoqi@0: // or an anonymous class loaded through normal classloading does not aoqi@0: // have this embedded field. aoqi@0: // aoqi@0: aoqi@0: friend class SystemDictionary; aoqi@0: aoqi@0: public: aoqi@0: bool has_nonstatic_fields() const { aoqi@0: return (_misc_flags & _misc_has_nonstatic_fields) != 0; aoqi@0: } aoqi@0: void set_has_nonstatic_fields(bool b) { aoqi@0: if (b) { aoqi@0: _misc_flags |= _misc_has_nonstatic_fields; aoqi@0: } else { aoqi@0: _misc_flags &= ~_misc_has_nonstatic_fields; aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: // field sizes aoqi@0: int nonstatic_field_size() const { return _nonstatic_field_size; } aoqi@0: void set_nonstatic_field_size(int size) { _nonstatic_field_size = size; } aoqi@0: aoqi@0: int static_field_size() const { return _static_field_size; } aoqi@0: void set_static_field_size(int size) { _static_field_size = size; } aoqi@0: aoqi@0: int static_oop_field_count() const { return (int)_static_oop_field_count; } aoqi@0: void set_static_oop_field_count(u2 size) { _static_oop_field_count = size; } aoqi@0: aoqi@0: // Java vtable aoqi@0: int vtable_length() const { return _vtable_len; } aoqi@0: void set_vtable_length(int len) { _vtable_len = len; } aoqi@0: aoqi@0: // Java itable aoqi@0: int itable_length() const { return _itable_len; } aoqi@0: void set_itable_length(int len) { _itable_len = len; } aoqi@0: aoqi@0: // array klasses aoqi@0: Klass* array_klasses() const { return _array_klasses; } aoqi@0: void set_array_klasses(Klass* k) { _array_klasses = k; } aoqi@0: aoqi@0: // methods aoqi@0: Array* methods() const { return _methods; } aoqi@0: void set_methods(Array* a) { _methods = a; } aoqi@0: Method* method_with_idnum(int idnum); aoqi@0: aoqi@0: // method ordering aoqi@0: Array* method_ordering() const { return _method_ordering; } aoqi@0: void set_method_ordering(Array* m) { _method_ordering = m; } aoqi@0: void copy_method_ordering(intArray* m, TRAPS); aoqi@0: aoqi@0: // default_methods aoqi@0: Array* default_methods() const { return _default_methods; } aoqi@0: void set_default_methods(Array* a) { _default_methods = a; } aoqi@0: aoqi@0: // default method vtable_indices aoqi@0: Array* default_vtable_indices() const { return _default_vtable_indices; } aoqi@0: void set_default_vtable_indices(Array* v) { _default_vtable_indices = v; } aoqi@0: Array* create_new_default_vtable_indices(int len, TRAPS); aoqi@0: aoqi@0: // interfaces aoqi@0: Array* local_interfaces() const { return _local_interfaces; } aoqi@0: void set_local_interfaces(Array* a) { aoqi@0: guarantee(_local_interfaces == NULL || a == NULL, "Just checking"); aoqi@0: _local_interfaces = a; } aoqi@0: aoqi@0: Array* transitive_interfaces() const { return _transitive_interfaces; } aoqi@0: void set_transitive_interfaces(Array* a) { aoqi@0: guarantee(_transitive_interfaces == NULL || a == NULL, "Just checking"); aoqi@0: _transitive_interfaces = a; aoqi@0: } aoqi@0: aoqi@0: private: aoqi@0: friend class fieldDescriptor; aoqi@0: FieldInfo* field(int index) const { return FieldInfo::from_field_array(_fields, index); } aoqi@0: aoqi@0: public: aoqi@0: int field_offset (int index) const { return field(index)->offset(); } aoqi@0: int field_access_flags(int index) const { return field(index)->access_flags(); } aoqi@0: Symbol* field_name (int index) const { return field(index)->name(constants()); } aoqi@0: Symbol* field_signature (int index) const { return field(index)->signature(constants()); } aoqi@0: aoqi@0: // Number of Java declared fields aoqi@0: int java_fields_count() const { return (int)_java_fields_count; } aoqi@0: aoqi@0: Array* fields() const { return _fields; } aoqi@0: void set_fields(Array* f, u2 java_fields_count) { aoqi@0: guarantee(_fields == NULL || f == NULL, "Just checking"); aoqi@0: _fields = f; aoqi@0: _java_fields_count = java_fields_count; aoqi@0: } aoqi@0: aoqi@0: // inner classes aoqi@0: Array* inner_classes() const { return _inner_classes; } aoqi@0: void set_inner_classes(Array* f) { _inner_classes = f; } aoqi@0: aoqi@0: enum InnerClassAttributeOffset { aoqi@0: // From http://mirror.eng/products/jdk/1.1/docs/guide/innerclasses/spec/innerclasses.doc10.html#18814 aoqi@0: inner_class_inner_class_info_offset = 0, aoqi@0: inner_class_outer_class_info_offset = 1, aoqi@0: inner_class_inner_name_offset = 2, aoqi@0: inner_class_access_flags_offset = 3, aoqi@0: inner_class_next_offset = 4 aoqi@0: }; aoqi@0: aoqi@0: enum EnclosingMethodAttributeOffset { aoqi@0: enclosing_method_class_index_offset = 0, aoqi@0: enclosing_method_method_index_offset = 1, aoqi@0: enclosing_method_attribute_size = 2 aoqi@0: }; aoqi@0: aoqi@0: // method override check aoqi@0: bool is_override(methodHandle super_method, Handle targetclassloader, Symbol* targetclassname, TRAPS); aoqi@0: aoqi@0: // package aoqi@0: bool is_same_class_package(Klass* class2); aoqi@0: bool is_same_class_package(oop classloader2, Symbol* classname2); aoqi@0: static bool is_same_class_package(oop class_loader1, Symbol* class_name1, oop class_loader2, Symbol* class_name2); aoqi@0: aoqi@0: // find an enclosing class (defined where original code was, in jvm.cpp!) aoqi@0: Klass* compute_enclosing_class(bool* inner_is_member, TRAPS) { aoqi@0: instanceKlassHandle self(THREAD, this); aoqi@0: return compute_enclosing_class_impl(self, inner_is_member, THREAD); aoqi@0: } aoqi@0: static Klass* compute_enclosing_class_impl(instanceKlassHandle self, aoqi@0: bool* inner_is_member, TRAPS); aoqi@0: aoqi@0: // tell if two classes have the same enclosing class (at package level) aoqi@0: bool is_same_package_member(Klass* class2, TRAPS) { aoqi@0: instanceKlassHandle self(THREAD, this); aoqi@0: return is_same_package_member_impl(self, class2, THREAD); aoqi@0: } aoqi@0: static bool is_same_package_member_impl(instanceKlassHandle self, aoqi@0: Klass* class2, TRAPS); aoqi@0: aoqi@0: // initialization state aoqi@0: bool is_loaded() const { return _init_state >= loaded; } aoqi@0: bool is_linked() const { return _init_state >= linked; } aoqi@0: bool is_initialized() const { return _init_state == fully_initialized; } aoqi@0: bool is_not_initialized() const { return _init_state < being_initialized; } aoqi@0: bool is_being_initialized() const { return _init_state == being_initialized; } aoqi@0: bool is_in_error_state() const { return _init_state == initialization_error; } aoqi@0: bool is_reentrant_initialization(Thread *thread) { return thread == _init_thread; } aoqi@0: ClassState init_state() { return (ClassState)_init_state; } aoqi@0: bool is_rewritten() const { return (_misc_flags & _misc_rewritten) != 0; } aoqi@0: aoqi@0: // defineClass specified verification aoqi@0: bool should_verify_class() const { aoqi@0: return (_misc_flags & _misc_should_verify_class) != 0; aoqi@0: } aoqi@0: void set_should_verify_class(bool value) { aoqi@0: if (value) { aoqi@0: _misc_flags |= _misc_should_verify_class; aoqi@0: } else { aoqi@0: _misc_flags &= ~_misc_should_verify_class; aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: // marking aoqi@0: bool is_marked_dependent() const { return _is_marked_dependent; } aoqi@0: void set_is_marked_dependent(bool value) { _is_marked_dependent = value; } aoqi@0: aoqi@0: // initialization (virtuals from Klass) aoqi@0: bool should_be_initialized() const; // means that initialize should be called aoqi@0: void initialize(TRAPS); aoqi@0: void link_class(TRAPS); aoqi@0: bool link_class_or_fail(TRAPS); // returns false on failure aoqi@0: void unlink_class(); aoqi@0: void rewrite_class(TRAPS); aoqi@0: void link_methods(TRAPS); aoqi@0: Method* class_initializer(); aoqi@0: aoqi@0: // set the class to initialized if no static initializer is present aoqi@0: void eager_initialize(Thread *thread); aoqi@0: aoqi@0: // reference type aoqi@0: ReferenceType reference_type() const { return (ReferenceType)_reference_type; } aoqi@0: void set_reference_type(ReferenceType t) { aoqi@0: assert(t == (u1)t, "overflow"); aoqi@0: _reference_type = (u1)t; aoqi@0: } aoqi@0: aoqi@0: static ByteSize reference_type_offset() { return in_ByteSize(offset_of(InstanceKlass, _reference_type)); } aoqi@0: aoqi@0: // find local field, returns true if found aoqi@0: bool find_local_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const; aoqi@0: // find field in direct superinterfaces, returns the interface in which the field is defined aoqi@0: Klass* find_interface_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const; aoqi@0: // find field according to JVM spec 5.4.3.2, returns the klass in which the field is defined aoqi@0: Klass* find_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const; aoqi@0: // find instance or static fields according to JVM spec 5.4.3.2, returns the klass in which the field is defined aoqi@0: Klass* find_field(Symbol* name, Symbol* sig, bool is_static, fieldDescriptor* fd) const; aoqi@0: aoqi@0: // find a non-static or static field given its offset within the class. aoqi@0: bool contains_field_offset(int offset) { aoqi@0: return instanceOopDesc::contains_field_offset(offset, nonstatic_field_size()); aoqi@0: } aoqi@0: aoqi@0: bool find_local_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const; aoqi@0: bool find_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const; aoqi@0: aoqi@0: // find a local method (returns NULL if not found) aoqi@0: Method* find_method(Symbol* name, Symbol* signature) const; aoqi@0: static Method* find_method(Array* methods, Symbol* name, Symbol* signature); aoqi@0: static Method* find_instance_method(Array* methods, Symbol* name, Symbol* signature); aoqi@0: aoqi@0: // find a local method index in default_methods (returns -1 if not found) aoqi@0: static int find_method_index(Array* methods, Symbol* name, Symbol* signature, bool skipping_overpass); aoqi@0: aoqi@0: // lookup operation (returns NULL if not found) aoqi@0: Method* uncached_lookup_method(Symbol* name, Symbol* signature, MethodLookupMode mode) const; aoqi@0: aoqi@0: // lookup a method in all the interfaces that this class implements aoqi@0: // (returns NULL if not found) aoqi@0: Method* lookup_method_in_all_interfaces(Symbol* name, Symbol* signature, MethodLookupMode mode) const; aoqi@0: aoqi@0: // lookup a method in local defaults then in all interfaces aoqi@0: // (returns NULL if not found) aoqi@0: Method* lookup_method_in_ordered_interfaces(Symbol* name, Symbol* signature) const; aoqi@0: aoqi@0: // Find method indices by name. If a method with the specified name is aoqi@0: // found the index to the first method is returned, and 'end' is filled in aoqi@0: // with the index of first non-name-matching method. If no method is found aoqi@0: // -1 is returned. aoqi@0: int find_method_by_name(Symbol* name, int* end); aoqi@0: static int find_method_by_name(Array* methods, Symbol* name, int* end); aoqi@0: aoqi@0: // constant pool aoqi@0: ConstantPool* constants() const { return _constants; } aoqi@0: void set_constants(ConstantPool* c) { _constants = c; } aoqi@0: aoqi@0: // protection domain aoqi@0: oop protection_domain() const; aoqi@0: aoqi@0: // signers aoqi@0: objArrayOop signers() const; aoqi@0: aoqi@0: // host class aoqi@0: Klass* host_klass() const { aoqi@0: Klass** hk = (Klass**)adr_host_klass(); aoqi@0: if (hk == NULL) { aoqi@0: return NULL; aoqi@0: } else { aoqi@0: assert(*hk != NULL, "host klass should always be set if the address is not null"); aoqi@0: return *hk; aoqi@0: } aoqi@0: } aoqi@0: void set_host_klass(Klass* host) { aoqi@0: assert(is_anonymous(), "not anonymous"); aoqi@0: Klass** addr = (Klass**)adr_host_klass(); aoqi@0: assert(addr != NULL, "no reversed space"); aoqi@0: if (addr != NULL) { aoqi@0: *addr = host; aoqi@0: } aoqi@0: } aoqi@0: bool is_anonymous() const { aoqi@0: return (_misc_flags & _misc_is_anonymous) != 0; aoqi@0: } aoqi@0: void set_is_anonymous(bool value) { aoqi@0: if (value) { aoqi@0: _misc_flags |= _misc_is_anonymous; aoqi@0: } else { aoqi@0: _misc_flags &= ~_misc_is_anonymous; aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: // Oop that keeps the metadata for this class from being unloaded aoqi@0: // in places where the metadata is stored in other places, like nmethods aoqi@0: oop klass_holder() const { aoqi@0: return is_anonymous() ? java_mirror() : class_loader(); aoqi@0: } aoqi@0: aoqi@0: bool is_contended() const { aoqi@0: return (_misc_flags & _misc_is_contended) != 0; aoqi@0: } aoqi@0: void set_is_contended(bool value) { aoqi@0: if (value) { aoqi@0: _misc_flags |= _misc_is_contended; aoqi@0: } else { aoqi@0: _misc_flags &= ~_misc_is_contended; aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: // source file name aoqi@0: Symbol* source_file_name() const { aoqi@0: return (_source_file_name_index == 0) ? aoqi@0: (Symbol*)NULL : _constants->symbol_at(_source_file_name_index); aoqi@0: } aoqi@0: u2 source_file_name_index() const { aoqi@0: return _source_file_name_index; aoqi@0: } aoqi@0: void set_source_file_name_index(u2 sourcefile_index) { aoqi@0: _source_file_name_index = sourcefile_index; aoqi@0: } aoqi@0: aoqi@0: // minor and major version numbers of class file aoqi@0: u2 minor_version() const { return _minor_version; } aoqi@0: void set_minor_version(u2 minor_version) { _minor_version = minor_version; } aoqi@0: u2 major_version() const { return _major_version; } aoqi@0: void set_major_version(u2 major_version) { _major_version = major_version; } aoqi@0: aoqi@0: // source debug extension aoqi@0: char* source_debug_extension() const { return _source_debug_extension; } aoqi@0: void set_source_debug_extension(char* array, int length); aoqi@0: aoqi@0: // symbol unloading support (refcount already added) aoqi@0: Symbol* array_name() { return _array_name; } aoqi@0: void set_array_name(Symbol* name) { assert(_array_name == NULL || name == NULL, "name already created"); _array_name = name; } aoqi@0: aoqi@0: // nonstatic oop-map blocks aoqi@0: static int nonstatic_oop_map_size(unsigned int oop_map_count) { aoqi@0: return oop_map_count * OopMapBlock::size_in_words(); aoqi@0: } aoqi@0: unsigned int nonstatic_oop_map_count() const { aoqi@0: return _nonstatic_oop_map_size / OopMapBlock::size_in_words(); aoqi@0: } aoqi@0: int nonstatic_oop_map_size() const { return _nonstatic_oop_map_size; } aoqi@0: void set_nonstatic_oop_map_size(int words) { aoqi@0: _nonstatic_oop_map_size = words; aoqi@0: } aoqi@0: aoqi@0: // RedefineClasses() support for previous versions: aoqi@0: void add_previous_version(instanceKlassHandle ikh, BitMap *emcp_methods, aoqi@0: int emcp_method_count); aoqi@0: // If the _previous_versions array is non-NULL, then this klass aoqi@0: // has been redefined at least once even if we aren't currently aoqi@0: // tracking a previous version. aoqi@0: bool has_been_redefined() const { return _previous_versions != NULL; } aoqi@0: bool has_previous_version() const; aoqi@0: void init_previous_versions() { aoqi@0: _previous_versions = NULL; aoqi@0: } aoqi@0: GrowableArray* previous_versions() const { aoqi@0: return _previous_versions; aoqi@0: } aoqi@0: aoqi@0: static void purge_previous_versions(InstanceKlass* ik); aoqi@0: aoqi@0: // JVMTI: Support for caching a class file before it is modified by an agent that can do retransformation aoqi@0: void set_cached_class_file(JvmtiCachedClassFileData *data) { aoqi@0: _cached_class_file = data; aoqi@0: } aoqi@0: JvmtiCachedClassFileData * get_cached_class_file() { return _cached_class_file; } aoqi@0: jint get_cached_class_file_len(); aoqi@0: unsigned char * get_cached_class_file_bytes(); aoqi@0: aoqi@0: // JVMTI: Support for caching of field indices, types, and offsets aoqi@0: void set_jvmti_cached_class_field_map(JvmtiCachedClassFieldMap* descriptor) { aoqi@0: _jvmti_cached_class_field_map = descriptor; aoqi@0: } aoqi@0: JvmtiCachedClassFieldMap* jvmti_cached_class_field_map() const { aoqi@0: return _jvmti_cached_class_field_map; aoqi@0: } aoqi@0: aoqi@0: bool has_default_methods() const { aoqi@0: return (_misc_flags & _misc_has_default_methods) != 0; aoqi@0: } aoqi@0: void set_has_default_methods(bool b) { aoqi@0: if (b) { aoqi@0: _misc_flags |= _misc_has_default_methods; aoqi@0: } else { aoqi@0: _misc_flags &= ~_misc_has_default_methods; aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: // for adding methods, ConstMethod::UNSET_IDNUM means no more ids available aoqi@0: inline u2 next_method_idnum(); aoqi@0: void set_initial_method_idnum(u2 value) { _idnum_allocated_count = value; } aoqi@0: aoqi@0: // generics support aoqi@0: Symbol* generic_signature() const { aoqi@0: return (_generic_signature_index == 0) ? aoqi@0: (Symbol*)NULL : _constants->symbol_at(_generic_signature_index); aoqi@0: } aoqi@0: u2 generic_signature_index() const { aoqi@0: return _generic_signature_index; aoqi@0: } aoqi@0: void set_generic_signature_index(u2 sig_index) { aoqi@0: _generic_signature_index = sig_index; aoqi@0: } aoqi@0: aoqi@0: u2 enclosing_method_data(int offset); aoqi@0: u2 enclosing_method_class_index() { aoqi@0: return enclosing_method_data(enclosing_method_class_index_offset); aoqi@0: } aoqi@0: u2 enclosing_method_method_index() { aoqi@0: return enclosing_method_data(enclosing_method_method_index_offset); aoqi@0: } aoqi@0: void set_enclosing_method_indices(u2 class_index, aoqi@0: u2 method_index); aoqi@0: aoqi@0: // jmethodID support aoqi@0: static jmethodID get_jmethod_id(instanceKlassHandle ik_h, aoqi@0: methodHandle method_h); aoqi@0: static jmethodID get_jmethod_id_fetch_or_update(instanceKlassHandle ik_h, aoqi@0: size_t idnum, jmethodID new_id, jmethodID* new_jmeths, aoqi@0: jmethodID* to_dealloc_id_p, aoqi@0: jmethodID** to_dealloc_jmeths_p); aoqi@0: static void get_jmethod_id_length_value(jmethodID* cache, size_t idnum, aoqi@0: size_t *length_p, jmethodID* id_p); aoqi@0: jmethodID jmethod_id_or_null(Method* method); aoqi@0: aoqi@0: // annotations support aoqi@0: Annotations* annotations() const { return _annotations; } aoqi@0: void set_annotations(Annotations* anno) { _annotations = anno; } aoqi@0: aoqi@0: AnnotationArray* class_annotations() const { aoqi@0: return (_annotations != NULL) ? _annotations->class_annotations() : NULL; aoqi@0: } aoqi@0: Array* fields_annotations() const { aoqi@0: return (_annotations != NULL) ? _annotations->fields_annotations() : NULL; aoqi@0: } aoqi@0: AnnotationArray* class_type_annotations() const { aoqi@0: return (_annotations != NULL) ? _annotations->class_type_annotations() : NULL; aoqi@0: } aoqi@0: Array* fields_type_annotations() const { aoqi@0: return (_annotations != NULL) ? _annotations->fields_type_annotations() : NULL; aoqi@0: } aoqi@0: // allocation aoqi@0: instanceOop allocate_instance(TRAPS); aoqi@0: aoqi@0: // additional member function to return a handle aoqi@0: instanceHandle allocate_instance_handle(TRAPS) { return instanceHandle(THREAD, allocate_instance(THREAD)); } aoqi@0: aoqi@0: objArrayOop allocate_objArray(int n, int length, TRAPS); aoqi@0: // Helper function aoqi@0: static instanceOop register_finalizer(instanceOop i, TRAPS); aoqi@0: aoqi@0: // Check whether reflection/jni/jvm code is allowed to instantiate this class; aoqi@0: // if not, throw either an Error or an Exception. aoqi@0: virtual void check_valid_for_instantiation(bool throwError, TRAPS); aoqi@0: aoqi@0: // initialization aoqi@0: void call_class_initializer(TRAPS); aoqi@0: void set_initialization_state_and_notify(ClassState state, TRAPS); aoqi@0: aoqi@0: // OopMapCache support aoqi@0: OopMapCache* oop_map_cache() { return _oop_map_cache; } aoqi@0: void set_oop_map_cache(OopMapCache *cache) { _oop_map_cache = cache; } aoqi@0: void mask_for(methodHandle method, int bci, InterpreterOopMap* entry); aoqi@0: aoqi@0: // JNI identifier support (for static fields - for jni performance) aoqi@0: JNIid* jni_ids() { return _jni_ids; } aoqi@0: void set_jni_ids(JNIid* ids) { _jni_ids = ids; } aoqi@0: JNIid* jni_id_for(int offset); aoqi@0: aoqi@0: // maintenance of deoptimization dependencies aoqi@0: int mark_dependent_nmethods(DepChange& changes); aoqi@0: void add_dependent_nmethod(nmethod* nm); aoqi@0: void remove_dependent_nmethod(nmethod* nm); aoqi@0: aoqi@0: // On-stack replacement support aoqi@0: nmethod* osr_nmethods_head() const { return _osr_nmethods_head; }; aoqi@0: void set_osr_nmethods_head(nmethod* h) { _osr_nmethods_head = h; }; aoqi@0: void add_osr_nmethod(nmethod* n); aoqi@0: void remove_osr_nmethod(nmethod* n); aoqi@0: nmethod* lookup_osr_nmethod(const Method* m, int bci, int level, bool match_level) const; aoqi@0: aoqi@0: // Breakpoint support (see methods on Method* for details) aoqi@0: BreakpointInfo* breakpoints() const { return _breakpoints; }; aoqi@0: void set_breakpoints(BreakpointInfo* bps) { _breakpoints = bps; }; aoqi@0: aoqi@0: // support for stub routines aoqi@0: static ByteSize init_state_offset() { return in_ByteSize(offset_of(InstanceKlass, _init_state)); } aoqi@0: TRACE_DEFINE_OFFSET; aoqi@0: static ByteSize init_thread_offset() { return in_ByteSize(offset_of(InstanceKlass, _init_thread)); } aoqi@0: aoqi@0: // subclass/subinterface checks aoqi@0: bool implements_interface(Klass* k) const; aoqi@0: bool is_same_or_direct_interface(Klass* k) const; aoqi@0: aoqi@0: // Access to the implementor of an interface. aoqi@0: Klass* implementor() const aoqi@0: { aoqi@0: Klass** k = adr_implementor(); aoqi@0: if (k == NULL) { aoqi@0: return NULL; aoqi@0: } else { aoqi@0: return *k; aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: void set_implementor(Klass* k) { aoqi@0: assert(is_interface(), "not interface"); aoqi@0: Klass** addr = adr_implementor(); aoqi@0: assert(addr != NULL, "null addr"); aoqi@0: if (addr != NULL) { aoqi@0: *addr = k; aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: int nof_implementors() const { aoqi@0: Klass* k = implementor(); aoqi@0: if (k == NULL) { aoqi@0: return 0; aoqi@0: } else if (k != this) { aoqi@0: return 1; aoqi@0: } else { aoqi@0: return 2; aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: void add_implementor(Klass* k); // k is a new class that implements this interface aoqi@0: void init_implementor(); // initialize aoqi@0: aoqi@0: // link this class into the implementors list of every interface it implements aoqi@0: void process_interfaces(Thread *thread); aoqi@0: aoqi@0: // virtual operations from Klass aoqi@0: bool is_leaf_class() const { return _subklass == NULL; } aoqi@0: GrowableArray* compute_secondary_supers(int num_extra_slots); aoqi@0: bool compute_is_subtype_of(Klass* k); aoqi@0: bool can_be_primary_super_slow() const; aoqi@0: int oop_size(oop obj) const { return size_helper(); } aoqi@0: bool oop_is_instance_slow() const { return true; } aoqi@0: aoqi@0: // Iterators aoqi@0: void do_local_static_fields(FieldClosure* cl); aoqi@0: void do_nonstatic_fields(FieldClosure* cl); // including inherited fields aoqi@0: void do_local_static_fields(void f(fieldDescriptor*, Handle, TRAPS), Handle, TRAPS); aoqi@0: aoqi@0: void methods_do(void f(Method* method)); aoqi@0: void array_klasses_do(void f(Klass* k)); aoqi@0: void array_klasses_do(void f(Klass* k, TRAPS), TRAPS); aoqi@0: bool super_types_do(SuperTypeClosure* blk); aoqi@0: aoqi@0: // Casting from Klass* aoqi@0: static InstanceKlass* cast(Klass* k) { aoqi@0: assert(k->is_klass(), "must be"); aoqi@0: assert(k->oop_is_instance(), "cast to InstanceKlass"); aoqi@0: return (InstanceKlass*) k; aoqi@0: } aoqi@0: aoqi@0: InstanceKlass* java_super() const { aoqi@0: return (super() == NULL) ? NULL : cast(super()); aoqi@0: } aoqi@0: aoqi@0: // Sizing (in words) aoqi@0: static int header_size() { return align_object_offset(sizeof(InstanceKlass)/HeapWordSize); } aoqi@0: aoqi@0: static int size(int vtable_length, int itable_length, aoqi@0: int nonstatic_oop_map_size, aoqi@0: bool is_interface, bool is_anonymous) { aoqi@0: return align_object_size(header_size() + aoqi@0: align_object_offset(vtable_length) + aoqi@0: align_object_offset(itable_length) + aoqi@0: ((is_interface || is_anonymous) ? aoqi@0: align_object_offset(nonstatic_oop_map_size) : aoqi@0: nonstatic_oop_map_size) + aoqi@0: (is_interface ? (int)sizeof(Klass*)/HeapWordSize : 0) + aoqi@0: (is_anonymous ? (int)sizeof(Klass*)/HeapWordSize : 0)); aoqi@0: } aoqi@0: int size() const { return size(vtable_length(), aoqi@0: itable_length(), aoqi@0: nonstatic_oop_map_size(), aoqi@0: is_interface(), aoqi@0: is_anonymous()); aoqi@0: } aoqi@0: #if INCLUDE_SERVICES aoqi@0: virtual void collect_statistics(KlassSizeStats *sz) const; aoqi@0: #endif aoqi@0: aoqi@0: static int vtable_start_offset() { return header_size(); } aoqi@0: static int vtable_length_offset() { return offset_of(InstanceKlass, _vtable_len) / HeapWordSize; } aoqi@0: aoqi@0: intptr_t* start_of_vtable() const { return ((intptr_t*)this) + vtable_start_offset(); } aoqi@0: intptr_t* start_of_itable() const { return start_of_vtable() + align_object_offset(vtable_length()); } aoqi@0: int itable_offset_in_words() const { return start_of_itable() - (intptr_t*)this; } aoqi@0: aoqi@0: intptr_t* end_of_itable() const { return start_of_itable() + itable_length(); } aoqi@0: aoqi@0: address static_field_addr(int offset); aoqi@0: aoqi@0: OopMapBlock* start_of_nonstatic_oop_maps() const { aoqi@0: return (OopMapBlock*)(start_of_itable() + align_object_offset(itable_length())); aoqi@0: } aoqi@0: aoqi@0: Klass** end_of_nonstatic_oop_maps() const { aoqi@0: return (Klass**)(start_of_nonstatic_oop_maps() + aoqi@0: nonstatic_oop_map_count()); aoqi@0: } aoqi@0: aoqi@0: Klass** adr_implementor() const { aoqi@0: if (is_interface()) { aoqi@0: return (Klass**)end_of_nonstatic_oop_maps(); aoqi@0: } else { aoqi@0: return NULL; aoqi@0: } aoqi@0: }; aoqi@0: aoqi@0: Klass** adr_host_klass() const { aoqi@0: if (is_anonymous()) { aoqi@0: Klass** adr_impl = adr_implementor(); aoqi@0: if (adr_impl != NULL) { aoqi@0: return adr_impl + 1; aoqi@0: } else { aoqi@0: return end_of_nonstatic_oop_maps(); aoqi@0: } aoqi@0: } else { aoqi@0: return NULL; aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: // Use this to return the size of an instance in heap words: aoqi@0: int size_helper() const { aoqi@0: return layout_helper_to_size_helper(layout_helper()); aoqi@0: } aoqi@0: aoqi@0: // This bit is initialized in classFileParser.cpp. aoqi@0: // It is false under any of the following conditions: aoqi@0: // - the class is abstract (including any interface) aoqi@0: // - the class has a finalizer (if !RegisterFinalizersAtInit) aoqi@0: // - the class size is larger than FastAllocateSizeLimit aoqi@0: // - the class is java/lang/Class, which cannot be allocated directly aoqi@0: bool can_be_fastpath_allocated() const { aoqi@0: return !layout_helper_needs_slow_path(layout_helper()); aoqi@0: } aoqi@0: aoqi@0: // Java vtable/itable aoqi@0: klassVtable* vtable() const; // return new klassVtable wrapper aoqi@0: inline Method* method_at_vtable(int index); aoqi@0: klassItable* itable() const; // return new klassItable wrapper aoqi@0: Method* method_at_itable(Klass* holder, int index, TRAPS); aoqi@0: aoqi@0: #if INCLUDE_JVMTI aoqi@0: void adjust_default_methods(Method** old_methods, Method** new_methods, aoqi@0: int methods_length, bool* trace_name_printed); aoqi@0: #endif // INCLUDE_JVMTI aoqi@0: aoqi@0: // Garbage collection aoqi@0: void oop_follow_contents(oop obj); aoqi@0: int oop_adjust_pointers(oop obj); aoqi@0: aoqi@0: void clean_implementors_list(BoolObjectClosure* is_alive); aoqi@0: void clean_method_data(BoolObjectClosure* is_alive); aoqi@0: aoqi@0: // Explicit metaspace deallocation of fields aoqi@0: // For RedefineClasses and class file parsing errors, we need to deallocate aoqi@0: // instanceKlasses and the metadata they point to. aoqi@0: void deallocate_contents(ClassLoaderData* loader_data); aoqi@0: static void deallocate_methods(ClassLoaderData* loader_data, aoqi@0: Array* methods); aoqi@0: void static deallocate_interfaces(ClassLoaderData* loader_data, aoqi@0: Klass* super_klass, aoqi@0: Array* local_interfaces, aoqi@0: Array* transitive_interfaces); aoqi@0: aoqi@0: // The constant pool is on stack if any of the methods are executing or aoqi@0: // referenced by handles. aoqi@0: bool on_stack() const { return _constants->on_stack(); } aoqi@0: aoqi@0: // callbacks for actions during class unloading aoqi@0: static void notify_unload_class(InstanceKlass* ik); aoqi@0: static void release_C_heap_structures(InstanceKlass* ik); aoqi@0: aoqi@0: // Parallel Scavenge and Parallel Old aoqi@0: PARALLEL_GC_DECLS aoqi@0: aoqi@0: // Naming aoqi@0: const char* signature_name() const; aoqi@0: aoqi@0: // Iterators aoqi@0: int oop_oop_iterate(oop obj, ExtendedOopClosure* blk) { aoqi@0: return oop_oop_iterate_v(obj, blk); aoqi@0: } aoqi@0: aoqi@0: int oop_oop_iterate_m(oop obj, ExtendedOopClosure* blk, MemRegion mr) { aoqi@0: return oop_oop_iterate_v_m(obj, blk, mr); aoqi@0: } aoqi@0: aoqi@0: #define InstanceKlass_OOP_OOP_ITERATE_DECL(OopClosureType, nv_suffix) \ aoqi@0: int oop_oop_iterate##nv_suffix(oop obj, OopClosureType* blk); \ aoqi@0: int oop_oop_iterate##nv_suffix##_m(oop obj, OopClosureType* blk, \ aoqi@0: MemRegion mr); aoqi@0: aoqi@0: ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_DECL) aoqi@0: ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_DECL) aoqi@0: aoqi@0: #if INCLUDE_ALL_GCS aoqi@0: #define InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DECL(OopClosureType, nv_suffix) \ aoqi@0: int oop_oop_iterate_backwards##nv_suffix(oop obj, OopClosureType* blk); aoqi@0: aoqi@0: ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DECL) aoqi@0: ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DECL) aoqi@0: #endif // INCLUDE_ALL_GCS aoqi@0: aoqi@0: u2 idnum_allocated_count() const { return _idnum_allocated_count; } aoqi@0: aoqi@0: private: aoqi@0: // initialization state aoqi@0: #ifdef ASSERT aoqi@0: void set_init_state(ClassState state); aoqi@0: #else aoqi@0: void set_init_state(ClassState state) { _init_state = (u1)state; } aoqi@0: #endif aoqi@0: void set_rewritten() { _misc_flags |= _misc_rewritten; } aoqi@0: void set_init_thread(Thread *thread) { _init_thread = thread; } aoqi@0: aoqi@0: // The RedefineClasses() API can cause new method idnums to be needed aoqi@0: // which will cause the caches to grow. Safety requires different aoqi@0: // cache management logic if the caches can grow instead of just aoqi@0: // going from NULL to non-NULL. aoqi@0: bool idnum_can_increment() const { return has_been_redefined(); } aoqi@0: jmethodID* methods_jmethod_ids_acquire() const aoqi@0: { return (jmethodID*)OrderAccess::load_ptr_acquire(&_methods_jmethod_ids); } aoqi@0: void release_set_methods_jmethod_ids(jmethodID* jmeths) aoqi@0: { OrderAccess::release_store_ptr(&_methods_jmethod_ids, jmeths); } aoqi@0: aoqi@0: // Lock during initialization aoqi@0: public: aoqi@0: // Lock for (1) initialization; (2) access to the ConstantPool of this class. aoqi@0: // Must be one per class and it has to be a VM internal object so java code aoqi@0: // cannot lock it (like the mirror). aoqi@0: // It has to be an object not a Mutex because it's held through java calls. aoqi@0: oop init_lock() const; aoqi@0: private: aoqi@0: void fence_and_clear_init_lock(); aoqi@0: aoqi@0: // Static methods that are used to implement member methods where an exposed this pointer aoqi@0: // is needed due to possible GCs aoqi@0: static bool link_class_impl (instanceKlassHandle this_oop, bool throw_verifyerror, TRAPS); aoqi@0: static bool verify_code (instanceKlassHandle this_oop, bool throw_verifyerror, TRAPS); aoqi@0: static void initialize_impl (instanceKlassHandle this_oop, TRAPS); aoqi@0: static void eager_initialize_impl (instanceKlassHandle this_oop); aoqi@0: static void set_initialization_state_and_notify_impl (instanceKlassHandle this_oop, ClassState state, TRAPS); aoqi@0: static void call_class_initializer_impl (instanceKlassHandle this_oop, TRAPS); aoqi@0: static Klass* array_klass_impl (instanceKlassHandle this_oop, bool or_null, int n, TRAPS); aoqi@0: static void do_local_static_fields_impl (instanceKlassHandle this_oop, void f(fieldDescriptor* fd, Handle, TRAPS), Handle, TRAPS); aoqi@0: /* jni_id_for_impl for jfieldID only */ aoqi@0: static JNIid* jni_id_for_impl (instanceKlassHandle this_oop, int offset); aoqi@0: aoqi@0: // Returns the array class for the n'th dimension aoqi@0: Klass* array_klass_impl(bool or_null, int n, TRAPS); aoqi@0: aoqi@0: // Returns the array class with this class as element type aoqi@0: Klass* array_klass_impl(bool or_null, TRAPS); aoqi@0: aoqi@0: // find a local method (returns NULL if not found) aoqi@0: Method* find_method_impl(Symbol* name, Symbol* signature, bool skipping_overpass) const; aoqi@0: static Method* find_method_impl(Array* methods, Symbol* name, Symbol* signature, bool skipping_overpass); aoqi@0: aoqi@0: // Free CHeap allocated fields. aoqi@0: void release_C_heap_structures(); aoqi@0: public: aoqi@0: // CDS support - remove and restore oops from metadata. Oops are not shared. aoqi@0: virtual void remove_unshareable_info(); aoqi@0: virtual void restore_unshareable_info(TRAPS); aoqi@0: aoqi@0: // jvm support aoqi@0: jint compute_modifier_flags(TRAPS) const; aoqi@0: aoqi@0: // JSR-292 support aoqi@0: MemberNameTable* member_names() { return _member_names; } aoqi@0: void set_member_names(MemberNameTable* member_names) { _member_names = member_names; } aoqi@0: void add_member_name(int index, Handle member_name); aoqi@0: oop get_member_name(int index); aoqi@0: aoqi@0: public: aoqi@0: // JVMTI support aoqi@0: jint jvmti_class_status() const; aoqi@0: aoqi@0: public: aoqi@0: // Printing aoqi@0: #ifndef PRODUCT aoqi@0: void print_on(outputStream* st) const; aoqi@0: #endif aoqi@0: void print_value_on(outputStream* st) const; aoqi@0: aoqi@0: void oop_print_value_on(oop obj, outputStream* st); aoqi@0: aoqi@0: #ifndef PRODUCT aoqi@0: void oop_print_on (oop obj, outputStream* st); aoqi@0: aoqi@0: void print_dependent_nmethods(bool verbose = false); aoqi@0: bool is_dependent_nmethod(nmethod* nm); aoqi@0: #endif aoqi@0: aoqi@0: const char* internal_name() const; aoqi@0: aoqi@0: // Verification aoqi@0: void verify_on(outputStream* st); aoqi@0: aoqi@0: void oop_verify_on(oop obj, outputStream* st); aoqi@0: }; aoqi@0: aoqi@0: inline Method* InstanceKlass::method_at_vtable(int index) { aoqi@0: #ifndef PRODUCT aoqi@0: assert(index >= 0, "valid vtable index"); aoqi@0: if (DebugVtables) { aoqi@0: verify_vtable_index(index); aoqi@0: } aoqi@0: #endif aoqi@0: vtableEntry* ve = (vtableEntry*)start_of_vtable(); aoqi@0: return ve[index].method(); aoqi@0: } aoqi@0: aoqi@0: // for adding methods aoqi@0: // UNSET_IDNUM return means no more ids available aoqi@0: inline u2 InstanceKlass::next_method_idnum() { aoqi@0: if (_idnum_allocated_count == ConstMethod::MAX_IDNUM) { aoqi@0: return ConstMethod::UNSET_IDNUM; // no more ids available aoqi@0: } else { aoqi@0: return _idnum_allocated_count++; aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: aoqi@0: /* JNIid class for jfieldIDs only */ aoqi@0: class JNIid: public CHeapObj { aoqi@0: friend class VMStructs; aoqi@0: private: aoqi@0: Klass* _holder; aoqi@0: JNIid* _next; aoqi@0: int _offset; aoqi@0: #ifdef ASSERT aoqi@0: bool _is_static_field_id; aoqi@0: #endif aoqi@0: aoqi@0: public: aoqi@0: // Accessors aoqi@0: Klass* holder() const { return _holder; } aoqi@0: int offset() const { return _offset; } aoqi@0: JNIid* next() { return _next; } aoqi@0: // Constructor aoqi@0: JNIid(Klass* holder, int offset, JNIid* next); aoqi@0: // Identifier lookup aoqi@0: JNIid* find(int offset); aoqi@0: aoqi@0: bool find_local_field(fieldDescriptor* fd) { aoqi@0: return InstanceKlass::cast(holder())->find_local_field_from_offset(offset(), true, fd); aoqi@0: } aoqi@0: aoqi@0: static void deallocate(JNIid* id); aoqi@0: // Debugging aoqi@0: #ifdef ASSERT aoqi@0: bool is_static_field_id() const { return _is_static_field_id; } aoqi@0: void set_is_static_field_id() { _is_static_field_id = true; } aoqi@0: #endif aoqi@0: void verify(Klass* holder); aoqi@0: }; aoqi@0: aoqi@0: aoqi@0: // If breakpoints are more numerous than just JVMTI breakpoints, aoqi@0: // consider compressing this data structure. aoqi@0: // It is currently a simple linked list defined in method.hpp. aoqi@0: aoqi@0: class BreakpointInfo; aoqi@0: aoqi@0: aoqi@0: // A collection point for interesting information about the previous aoqi@0: // version(s) of an InstanceKlass. A GrowableArray of PreviousVersionNodes aoqi@0: // is attached to the InstanceKlass as needed. See PreviousVersionWalker below. aoqi@0: class PreviousVersionNode : public CHeapObj { aoqi@0: private: aoqi@0: ConstantPool* _prev_constant_pool; aoqi@0: aoqi@0: // If the previous version of the InstanceKlass doesn't have any aoqi@0: // EMCP methods, then _prev_EMCP_methods will be NULL. If all the aoqi@0: // EMCP methods have been collected, then _prev_EMCP_methods can aoqi@0: // have a length of zero. aoqi@0: GrowableArray* _prev_EMCP_methods; aoqi@0: aoqi@0: public: aoqi@0: PreviousVersionNode(ConstantPool* prev_constant_pool, aoqi@0: GrowableArray* prev_EMCP_methods); aoqi@0: ~PreviousVersionNode(); aoqi@0: ConstantPool* prev_constant_pool() const { aoqi@0: return _prev_constant_pool; aoqi@0: } aoqi@0: GrowableArray* prev_EMCP_methods() const { aoqi@0: return _prev_EMCP_methods; aoqi@0: } aoqi@0: }; aoqi@0: aoqi@0: aoqi@0: // Helper object for walking previous versions. aoqi@0: class PreviousVersionWalker : public StackObj { aoqi@0: private: aoqi@0: Thread* _thread; aoqi@0: GrowableArray* _previous_versions; aoqi@0: int _current_index; aoqi@0: aoqi@0: // A pointer to the current node object so we can handle the deletes. aoqi@0: PreviousVersionNode* _current_p; aoqi@0: aoqi@0: // The constant pool handle keeps all the methods in this class from being aoqi@0: // deallocated from the metaspace during class unloading. aoqi@0: constantPoolHandle _current_constant_pool_handle; aoqi@0: aoqi@0: public: aoqi@0: PreviousVersionWalker(Thread* thread, InstanceKlass *ik); aoqi@0: aoqi@0: // Return the interesting information for the next previous version aoqi@0: // of the klass. Returns NULL if there are no more previous versions. aoqi@0: PreviousVersionNode* next_previous_version(); aoqi@0: }; aoqi@0: aoqi@0: aoqi@0: // aoqi@0: // nmethodBucket is used to record dependent nmethods for aoqi@0: // deoptimization. nmethod dependencies are actually aoqi@0: // pairs but we really only care about the klass part for purposes of aoqi@0: // finding nmethods which might need to be deoptimized. Instead of aoqi@0: // recording the method, a count of how many times a particular nmethod aoqi@0: // was recorded is kept. This ensures that any recording errors are aoqi@0: // noticed since an nmethod should be removed as many times are it's aoqi@0: // added. aoqi@0: // aoqi@0: class nmethodBucket: public CHeapObj { aoqi@0: friend class VMStructs; aoqi@0: private: aoqi@0: nmethod* _nmethod; aoqi@0: int _count; aoqi@0: nmethodBucket* _next; aoqi@0: aoqi@0: public: aoqi@0: nmethodBucket(nmethod* nmethod, nmethodBucket* next) { aoqi@0: _nmethod = nmethod; aoqi@0: _next = next; aoqi@0: _count = 1; aoqi@0: } aoqi@0: int count() { return _count; } aoqi@0: int increment() { _count += 1; return _count; } aoqi@0: int decrement() { _count -= 1; assert(_count >= 0, "don't underflow"); return _count; } aoqi@0: nmethodBucket* next() { return _next; } aoqi@0: void set_next(nmethodBucket* b) { _next = b; } aoqi@0: nmethod* get_nmethod() { return _nmethod; } aoqi@0: }; aoqi@0: aoqi@0: // An iterator that's used to access the inner classes indices in the aoqi@0: // InstanceKlass::_inner_classes array. aoqi@0: class InnerClassesIterator : public StackObj { aoqi@0: private: aoqi@0: Array* _inner_classes; aoqi@0: int _length; aoqi@0: int _idx; aoqi@0: public: aoqi@0: aoqi@0: InnerClassesIterator(instanceKlassHandle k) { aoqi@0: _inner_classes = k->inner_classes(); aoqi@0: if (k->inner_classes() != NULL) { aoqi@0: _length = _inner_classes->length(); aoqi@0: // The inner class array's length should be the multiple of aoqi@0: // inner_class_next_offset if it only contains the InnerClasses aoqi@0: // attribute data, or it should be aoqi@0: // n*inner_class_next_offset+enclosing_method_attribute_size aoqi@0: // if it also contains the EnclosingMethod data. aoqi@0: assert((_length % InstanceKlass::inner_class_next_offset == 0 || aoqi@0: _length % InstanceKlass::inner_class_next_offset == InstanceKlass::enclosing_method_attribute_size), aoqi@0: "just checking"); aoqi@0: // Remove the enclosing_method portion if exists. aoqi@0: if (_length % InstanceKlass::inner_class_next_offset == InstanceKlass::enclosing_method_attribute_size) { aoqi@0: _length -= InstanceKlass::enclosing_method_attribute_size; aoqi@0: } aoqi@0: } else { aoqi@0: _length = 0; aoqi@0: } aoqi@0: _idx = 0; aoqi@0: } aoqi@0: aoqi@0: int length() const { aoqi@0: return _length; aoqi@0: } aoqi@0: aoqi@0: void next() { aoqi@0: _idx += InstanceKlass::inner_class_next_offset; aoqi@0: } aoqi@0: aoqi@0: bool done() const { aoqi@0: return (_idx >= _length); aoqi@0: } aoqi@0: aoqi@0: u2 inner_class_info_index() const { aoqi@0: return _inner_classes->at( aoqi@0: _idx + InstanceKlass::inner_class_inner_class_info_offset); aoqi@0: } aoqi@0: aoqi@0: void set_inner_class_info_index(u2 index) { aoqi@0: _inner_classes->at_put( aoqi@0: _idx + InstanceKlass::inner_class_inner_class_info_offset, index); aoqi@0: } aoqi@0: aoqi@0: u2 outer_class_info_index() const { aoqi@0: return _inner_classes->at( aoqi@0: _idx + InstanceKlass::inner_class_outer_class_info_offset); aoqi@0: } aoqi@0: aoqi@0: void set_outer_class_info_index(u2 index) { aoqi@0: _inner_classes->at_put( aoqi@0: _idx + InstanceKlass::inner_class_outer_class_info_offset, index); aoqi@0: } aoqi@0: aoqi@0: u2 inner_name_index() const { aoqi@0: return _inner_classes->at( aoqi@0: _idx + InstanceKlass::inner_class_inner_name_offset); aoqi@0: } aoqi@0: aoqi@0: void set_inner_name_index(u2 index) { aoqi@0: _inner_classes->at_put( aoqi@0: _idx + InstanceKlass::inner_class_inner_name_offset, index); aoqi@0: } aoqi@0: aoqi@0: u2 inner_access_flags() const { aoqi@0: return _inner_classes->at( aoqi@0: _idx + InstanceKlass::inner_class_access_flags_offset); aoqi@0: } aoqi@0: }; aoqi@0: aoqi@0: #endif // SHARE_VM_OOPS_INSTANCEKLASS_HPP