| /* |
| * Copyright (c) 1997, 2016, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #ifndef SHARE_VM_OOPS_INSTANCEKLASS_HPP |
| #define SHARE_VM_OOPS_INSTANCEKLASS_HPP |
| |
| #include "classfile/classLoader.hpp" |
| #include "classfile/classLoaderData.hpp" |
| #include "classfile/moduleEntry.hpp" |
| #include "classfile/packageEntry.hpp" |
| #include "gc/shared/specialized_oop_closures.hpp" |
| #include "logging/logLevel.hpp" |
| #include "memory/referenceType.hpp" |
| #include "oops/annotations.hpp" |
| #include "oops/constMethod.hpp" |
| #include "oops/fieldInfo.hpp" |
| #include "oops/instanceOop.hpp" |
| #include "oops/klassVtable.hpp" |
| #include "runtime/handles.hpp" |
| #include "runtime/os.hpp" |
| #include "trace/traceMacros.hpp" |
| #include "utilities/accessFlags.hpp" |
| #include "utilities/bitMap.inline.hpp" |
| #include "utilities/macros.hpp" |
| |
| // An InstanceKlass is the VM level representation of a Java class. |
| // It contains all information needed for at class at execution runtime. |
| |
| // InstanceKlass embedded field layout (after declared fields): |
| // [EMBEDDED Java vtable ] size in words = vtable_len |
| // [EMBEDDED nonstatic oop-map blocks] size in words = nonstatic_oop_map_size |
| // The embedded nonstatic oop-map blocks are short pairs (offset, length) |
| // indicating where oops are located in instances of this klass. |
| // [EMBEDDED implementor of the interface] only exist for interface |
| // [EMBEDDED host klass ] only exist for an anonymous class (JSR 292 enabled) |
| // [EMBEDDED fingerprint ] only if should_store_fingerprint()==true |
| |
| |
| // forward declaration for class -- see below for definition |
| #if INCLUDE_JVMTI |
| class BreakpointInfo; |
| #endif |
| class ClassFileParser; |
| class KlassDepChange; |
| class DependencyContext; |
| class fieldDescriptor; |
| class jniIdMapBase; |
| class JNIid; |
| class JvmtiCachedClassFieldMap; |
| class MemberNameTable; |
| class SuperTypeClosure; |
| |
| // This is used in iterators below. |
| class FieldClosure: public StackObj { |
| public: |
| virtual void do_field(fieldDescriptor* fd) = 0; |
| }; |
| |
| #ifndef PRODUCT |
| // Print fields. |
| // If "obj" argument to constructor is NULL, prints static fields, otherwise prints non-static fields. |
| class FieldPrinter: public FieldClosure { |
| oop _obj; |
| outputStream* _st; |
| public: |
| FieldPrinter(outputStream* st, oop obj = NULL) : _obj(obj), _st(st) {} |
| void do_field(fieldDescriptor* fd); |
| }; |
| #endif // !PRODUCT |
| |
| // ValueObjs embedded in klass. Describes where oops are located in instances of |
| // this klass. |
| class OopMapBlock VALUE_OBJ_CLASS_SPEC { |
| public: |
| // Byte offset of the first oop mapped by this block. |
| int offset() const { return _offset; } |
| void set_offset(int offset) { _offset = offset; } |
| |
| // Number of oops in this block. |
| uint count() const { return _count; } |
| void set_count(uint count) { _count = count; } |
| |
| // sizeof(OopMapBlock) in words. |
| static const int size_in_words() { |
| return align_size_up(int(sizeof(OopMapBlock)), wordSize) >> |
| LogBytesPerWord; |
| } |
| |
| private: |
| int _offset; |
| uint _count; |
| }; |
| |
| struct JvmtiCachedClassFileData; |
| |
| class InstanceKlass: public Klass { |
| friend class VMStructs; |
| friend class JVMCIVMStructs; |
| friend class ClassFileParser; |
| friend class CompileReplay; |
| |
| protected: |
| InstanceKlass(const ClassFileParser& parser, unsigned kind); |
| |
| public: |
| InstanceKlass() { assert(DumpSharedSpaces || UseSharedSpaces, "only for CDS"); } |
| |
| // See "The Java Virtual Machine Specification" section 2.16.2-5 for a detailed description |
| // of the class loading & initialization procedure, and the use of the states. |
| enum ClassState { |
| allocated, // allocated (but not yet linked) |
| loaded, // loaded and inserted in class hierarchy (but not linked yet) |
| linked, // successfully linked/verified (but not initialized yet) |
| being_initialized, // currently running class initializer |
| fully_initialized, // initialized (successfull final state) |
| initialization_error // error happened during initialization |
| }; |
| |
| static int number_of_instance_classes() { return _total_instanceKlass_count; } |
| |
| private: |
| static volatile int _total_instanceKlass_count; |
| static InstanceKlass* allocate_instance_klass(const ClassFileParser& parser, TRAPS); |
| |
| protected: |
| // Annotations for this class |
| Annotations* _annotations; |
| // Package this class is defined in |
| PackageEntry* _package_entry; |
| // Array classes holding elements of this class. |
| Klass* volatile _array_klasses; |
| // Constant pool for this class. |
| ConstantPool* _constants; |
| // The InnerClasses attribute and EnclosingMethod attribute. The |
| // _inner_classes is an array of shorts. If the class has InnerClasses |
| // attribute, then the _inner_classes array begins with 4-tuples of shorts |
| // [inner_class_info_index, outer_class_info_index, |
| // inner_name_index, inner_class_access_flags] for the InnerClasses |
| // attribute. If the EnclosingMethod attribute exists, it occupies the |
| // last two shorts [class_index, method_index] of the array. If only |
| // the InnerClasses attribute exists, the _inner_classes array length is |
| // number_of_inner_classes * 4. If the class has both InnerClasses |
| // and EnclosingMethod attributes the _inner_classes array length is |
| // number_of_inner_classes * 4 + enclosing_method_attribute_size. |
| Array<jushort>* _inner_classes; |
| |
| // the source debug extension for this klass, NULL if not specified. |
| // Specified as UTF-8 string without terminating zero byte in the classfile, |
| // it is stored in the instanceklass as a NULL-terminated UTF-8 string |
| const char* _source_debug_extension; |
| // Array name derived from this class which needs unreferencing |
| // if this class is unloaded. |
| Symbol* _array_name; |
| |
| // Number of heapOopSize words used by non-static fields in this klass |
| // (including inherited fields but after header_size()). |
| int _nonstatic_field_size; |
| int _static_field_size; // number words used by static fields (oop and non-oop) in this klass |
| // Constant pool index to the utf8 entry of the Generic signature, |
| // or 0 if none. |
| u2 _generic_signature_index; |
| // Constant pool index to the utf8 entry for the name of source file |
| // containing this klass, 0 if not specified. |
| u2 _source_file_name_index; |
| u2 _static_oop_field_count;// number of static oop fields in this klass |
| u2 _java_fields_count; // The number of declared Java fields |
| int _nonstatic_oop_map_size;// size in words of nonstatic oop map blocks |
| |
| int _itable_len; // length of Java itable (in words) |
| // _is_marked_dependent can be set concurrently, thus cannot be part of the |
| // _misc_flags. |
| bool _is_marked_dependent; // used for marking during flushing and deoptimization |
| bool _is_being_redefined; // used for locking redefinition |
| |
| // The low two bits of _misc_flags contains the kind field. |
| // This can be used to quickly discriminate among the four kinds of |
| // InstanceKlass. |
| |
| static const unsigned _misc_kind_field_size = 2; |
| static const unsigned _misc_kind_field_pos = 0; |
| static const unsigned _misc_kind_field_mask = (1u << _misc_kind_field_size) - 1u; |
| |
| static const unsigned _misc_kind_other = 0; // concrete InstanceKlass |
| static const unsigned _misc_kind_reference = 1; // InstanceRefKlass |
| static const unsigned _misc_kind_class_loader = 2; // InstanceClassLoaderKlass |
| static const unsigned _misc_kind_mirror = 3; // InstanceMirrorKlass |
| |
| // Start after _misc_kind field. |
| enum { |
| _misc_rewritten = 1 << 2, // methods rewritten. |
| _misc_has_nonstatic_fields = 1 << 3, // for sizing with UseCompressedOops |
| _misc_should_verify_class = 1 << 4, // allow caching of preverification |
| _misc_is_anonymous = 1 << 5, // has embedded _host_klass field |
| _misc_is_contended = 1 << 6, // marked with contended annotation |
| _misc_has_nonstatic_concrete_methods = 1 << 7, // class/superclass/implemented interfaces has non-static, concrete methods |
| _misc_declares_nonstatic_concrete_methods = 1 << 8, // directly declares non-static, concrete methods |
| _misc_has_been_redefined = 1 << 9, // class has been redefined |
| _misc_has_passed_fingerprint_check = 1 << 10, // when this class was loaded, the fingerprint computed from its |
| // code source was found to be matching the value recorded by AOT. |
| _misc_is_scratch_class = 1 << 11, // class is the redefined scratch class |
| _misc_is_shared_boot_class = 1 << 12, // defining class loader is boot class loader |
| _misc_is_shared_platform_class = 1 << 13, // defining class loader is platform class loader |
| _misc_is_shared_app_class = 1 << 14 // defining class loader is app class loader |
| }; |
| u2 loader_type_bits() { |
| return _misc_is_shared_boot_class|_misc_is_shared_platform_class|_misc_is_shared_app_class; |
| } |
| u2 _misc_flags; |
| u2 _minor_version; // minor version number of class file |
| u2 _major_version; // major version number of class file |
| Thread* _init_thread; // Pointer to current thread doing initialization (to handle recusive initialization) |
| OopMapCache* volatile _oop_map_cache; // OopMapCache for all methods in the klass (allocated lazily) |
| MemberNameTable* _member_names; // Member names |
| JNIid* _jni_ids; // First JNI identifier for static fields in this class |
| jmethodID* volatile _methods_jmethod_ids; // jmethodIDs corresponding to method_idnum, or NULL if none |
| intptr_t _dep_context; // packed DependencyContext structure |
| nmethod* _osr_nmethods_head; // Head of list of on-stack replacement nmethods for this class |
| #if INCLUDE_JVMTI |
| BreakpointInfo* _breakpoints; // bpt lists, managed by Method* |
| // Linked instanceKlasses of previous versions |
| InstanceKlass* _previous_versions; |
| // JVMTI fields can be moved to their own structure - see 6315920 |
| // JVMTI: cached class file, before retransformable agent modified it in CFLH |
| JvmtiCachedClassFileData* _cached_class_file; |
| #endif |
| |
| volatile u2 _idnum_allocated_count; // JNI/JVMTI: increments with the addition of methods, old ids don't change |
| |
| // Class states are defined as ClassState (see above). |
| // Place the _init_state here to utilize the unused 2-byte after |
| // _idnum_allocated_count. |
| u1 _init_state; // state of class |
| u1 _reference_type; // reference type |
| |
| #if INCLUDE_JVMTI |
| JvmtiCachedClassFieldMap* _jvmti_cached_class_field_map; // JVMTI: used during heap iteration |
| #endif |
| |
| NOT_PRODUCT(int _verify_count;) // to avoid redundant verifies |
| |
| // Method array. |
| Array<Method*>* _methods; |
| // Default Method Array, concrete methods inherited from interfaces |
| Array<Method*>* _default_methods; |
| // Interface (Klass*s) this class declares locally to implement. |
| Array<Klass*>* _local_interfaces; |
| // Interface (Klass*s) this class implements transitively. |
| Array<Klass*>* _transitive_interfaces; |
| // Int array containing the original order of method in the class file (for JVMTI). |
| Array<int>* _method_ordering; |
| // Int array containing the vtable_indices for default_methods |
| // offset matches _default_methods offset |
| Array<int>* _default_vtable_indices; |
| |
| // Instance and static variable information, starts with 6-tuples of shorts |
| // [access, name index, sig index, initval index, low_offset, high_offset] |
| // for all fields, followed by the generic signature data at the end of |
| // the array. Only fields with generic signature attributes have the generic |
| // signature data set in the array. The fields array looks like following: |
| // |
| // f1: [access, name index, sig index, initial value index, low_offset, high_offset] |
| // f2: [access, name index, sig index, initial value index, low_offset, high_offset] |
| // ... |
| // fn: [access, name index, sig index, initial value index, low_offset, high_offset] |
| // [generic signature index] |
| // [generic signature index] |
| // ... |
| Array<u2>* _fields; |
| |
| // embedded Java vtable follows here |
| // embedded Java itables follows here |
| // embedded static fields follows here |
| // embedded nonstatic oop-map blocks follows here |
| // embedded implementor of this interface follows here |
| // The embedded implementor only exists if the current klass is an |
| // iterface. The possible values of the implementor fall into following |
| // three cases: |
| // NULL: no implementor. |
| // A Klass* that's not itself: one implementor. |
| // Itself: more than one implementors. |
| // embedded host klass follows here |
| // The embedded host klass only exists in an anonymous class for |
| // dynamic language support (JSR 292 enabled). The host class grants |
| // its access privileges to this class also. The host class is either |
| // named, or a previously loaded anonymous class. A non-anonymous class |
| // or an anonymous class loaded through normal classloading does not |
| // have this embedded field. |
| // |
| |
| friend class SystemDictionary; |
| |
| public: |
| u2 loader_type() { |
| return _misc_flags & loader_type_bits(); |
| } |
| |
| bool is_shared_boot_class() const { |
| return (_misc_flags & _misc_is_shared_boot_class) != 0; |
| } |
| bool is_shared_platform_class() const { |
| return (_misc_flags & _misc_is_shared_platform_class) != 0; |
| } |
| bool is_shared_app_class() const { |
| return (_misc_flags & _misc_is_shared_app_class) != 0; |
| } |
| |
| void set_class_loader_type(s2 loader_type) { |
| assert(( _misc_flags & loader_type_bits()) == 0, |
| "Should only be called once for each class."); |
| switch (loader_type) { |
| case ClassLoader::BOOT_LOADER: |
| _misc_flags |= _misc_is_shared_boot_class; |
| break; |
| case ClassLoader::PLATFORM_LOADER: |
| _misc_flags |= _misc_is_shared_platform_class; |
| break; |
| case ClassLoader::APP_LOADER: |
| _misc_flags |= _misc_is_shared_app_class; |
| break; |
| default: |
| ShouldNotReachHere(); |
| break; |
| } |
| } |
| |
| bool has_nonstatic_fields() const { |
| return (_misc_flags & _misc_has_nonstatic_fields) != 0; |
| } |
| void set_has_nonstatic_fields(bool b) { |
| if (b) { |
| _misc_flags |= _misc_has_nonstatic_fields; |
| } else { |
| _misc_flags &= ~_misc_has_nonstatic_fields; |
| } |
| } |
| |
| // field sizes |
| int nonstatic_field_size() const { return _nonstatic_field_size; } |
| void set_nonstatic_field_size(int size) { _nonstatic_field_size = size; } |
| |
| int static_field_size() const { return _static_field_size; } |
| void set_static_field_size(int size) { _static_field_size = size; } |
| |
| int static_oop_field_count() const { return (int)_static_oop_field_count; } |
| void set_static_oop_field_count(u2 size) { _static_oop_field_count = size; } |
| |
| // Java itable |
| int itable_length() const { return _itable_len; } |
| void set_itable_length(int len) { _itable_len = len; } |
| |
| // array klasses |
| Klass* array_klasses() const { return _array_klasses; } |
| inline Klass* array_klasses_acquire() const; // load with acquire semantics |
| void set_array_klasses(Klass* k) { _array_klasses = k; } |
| inline void release_set_array_klasses(Klass* k); // store with release semantics |
| |
| // methods |
| Array<Method*>* methods() const { return _methods; } |
| void set_methods(Array<Method*>* a) { _methods = a; } |
| Method* method_with_idnum(int idnum); |
| Method* method_with_orig_idnum(int idnum); |
| Method* method_with_orig_idnum(int idnum, int version); |
| |
| // method ordering |
| Array<int>* method_ordering() const { return _method_ordering; } |
| void set_method_ordering(Array<int>* m) { _method_ordering = m; } |
| void copy_method_ordering(const intArray* m, TRAPS); |
| |
| // default_methods |
| Array<Method*>* default_methods() const { return _default_methods; } |
| void set_default_methods(Array<Method*>* a) { _default_methods = a; } |
| |
| // default method vtable_indices |
| Array<int>* default_vtable_indices() const { return _default_vtable_indices; } |
| void set_default_vtable_indices(Array<int>* v) { _default_vtable_indices = v; } |
| Array<int>* create_new_default_vtable_indices(int len, TRAPS); |
| |
| // interfaces |
| Array<Klass*>* local_interfaces() const { return _local_interfaces; } |
| void set_local_interfaces(Array<Klass*>* a) { |
| guarantee(_local_interfaces == NULL || a == NULL, "Just checking"); |
| _local_interfaces = a; } |
| |
| Array<Klass*>* transitive_interfaces() const { return _transitive_interfaces; } |
| void set_transitive_interfaces(Array<Klass*>* a) { |
| guarantee(_transitive_interfaces == NULL || a == NULL, "Just checking"); |
| _transitive_interfaces = a; |
| } |
| |
| private: |
| friend class fieldDescriptor; |
| FieldInfo* field(int index) const { return FieldInfo::from_field_array(_fields, index); } |
| |
| public: |
| int field_offset (int index) const { return field(index)->offset(); } |
| int field_access_flags(int index) const { return field(index)->access_flags(); } |
| Symbol* field_name (int index) const { return field(index)->name(constants()); } |
| Symbol* field_signature (int index) const { return field(index)->signature(constants()); } |
| |
| // Number of Java declared fields |
| int java_fields_count() const { return (int)_java_fields_count; } |
| |
| Array<u2>* fields() const { return _fields; } |
| void set_fields(Array<u2>* f, u2 java_fields_count) { |
| guarantee(_fields == NULL || f == NULL, "Just checking"); |
| _fields = f; |
| _java_fields_count = java_fields_count; |
| } |
| |
| // inner classes |
| Array<u2>* inner_classes() const { return _inner_classes; } |
| void set_inner_classes(Array<u2>* f) { _inner_classes = f; } |
| |
| enum InnerClassAttributeOffset { |
| // From http://mirror.eng/products/jdk/1.1/docs/guide/innerclasses/spec/innerclasses.doc10.html#18814 |
| inner_class_inner_class_info_offset = 0, |
| inner_class_outer_class_info_offset = 1, |
| inner_class_inner_name_offset = 2, |
| inner_class_access_flags_offset = 3, |
| inner_class_next_offset = 4 |
| }; |
| |
| enum EnclosingMethodAttributeOffset { |
| enclosing_method_class_index_offset = 0, |
| enclosing_method_method_index_offset = 1, |
| enclosing_method_attribute_size = 2 |
| }; |
| |
| // method override check |
| bool is_override(const methodHandle& super_method, Handle targetclassloader, Symbol* targetclassname, TRAPS); |
| |
| // package |
| PackageEntry* package() const { return _package_entry; } |
| ModuleEntry* module() const; |
| bool in_unnamed_package() const { return (_package_entry == NULL); } |
| void set_package(PackageEntry* p) { _package_entry = p; } |
| void set_package(ClassLoaderData* loader_data, TRAPS); |
| bool is_same_class_package(const Klass* class2) const; |
| bool is_same_class_package(oop classloader2, const Symbol* classname2) const; |
| static bool is_same_class_package(oop class_loader1, |
| const Symbol* class_name1, |
| oop class_loader2, |
| const Symbol* class_name2); |
| |
| // find an enclosing class |
| InstanceKlass* compute_enclosing_class(bool* inner_is_member, TRAPS) const { |
| return compute_enclosing_class_impl(this, inner_is_member, THREAD); |
| } |
| static InstanceKlass* compute_enclosing_class_impl(const InstanceKlass* self, |
| bool* inner_is_member, |
| TRAPS); |
| |
| // Find InnerClasses attribute for k and return outer_class_info_index & inner_name_index. |
| static bool find_inner_classes_attr(instanceKlassHandle k, |
| int* ooff, int* noff, TRAPS); |
| |
| private: |
| // Check prohibited package ("java/" only loadable by boot or platform loaders) |
| static void check_prohibited_package(Symbol* class_name, |
| Handle class_loader, |
| TRAPS); |
| public: |
| // tell if two classes have the same enclosing class (at package level) |
| bool is_same_package_member(const Klass* class2, TRAPS) const { |
| return is_same_package_member_impl(this, class2, THREAD); |
| } |
| static bool is_same_package_member_impl(const InstanceKlass* self, |
| const Klass* class2, |
| TRAPS); |
| |
| // initialization state |
| bool is_loaded() const { return _init_state >= loaded; } |
| bool is_linked() const { return _init_state >= linked; } |
| bool is_initialized() const { return _init_state == fully_initialized; } |
| bool is_not_initialized() const { return _init_state < being_initialized; } |
| bool is_being_initialized() const { return _init_state == being_initialized; } |
| bool is_in_error_state() const { return _init_state == initialization_error; } |
| bool is_reentrant_initialization(Thread *thread) { return thread == _init_thread; } |
| ClassState init_state() { return (ClassState)_init_state; } |
| bool is_rewritten() const { return (_misc_flags & _misc_rewritten) != 0; } |
| |
| // defineClass specified verification |
| bool should_verify_class() const { |
| return (_misc_flags & _misc_should_verify_class) != 0; |
| } |
| void set_should_verify_class(bool value) { |
| if (value) { |
| _misc_flags |= _misc_should_verify_class; |
| } else { |
| _misc_flags &= ~_misc_should_verify_class; |
| } |
| } |
| |
| // marking |
| bool is_marked_dependent() const { return _is_marked_dependent; } |
| void set_is_marked_dependent(bool value) { _is_marked_dependent = value; } |
| |
| // initialization (virtuals from Klass) |
| bool should_be_initialized() const; // means that initialize should be called |
| void initialize(TRAPS); |
| void link_class(TRAPS); |
| bool link_class_or_fail(TRAPS); // returns false on failure |
| void unlink_class(); |
| void rewrite_class(TRAPS); |
| void link_methods(TRAPS); |
| Method* class_initializer(); |
| |
| // set the class to initialized if no static initializer is present |
| void eager_initialize(Thread *thread); |
| |
| // reference type |
| ReferenceType reference_type() const { return (ReferenceType)_reference_type; } |
| void set_reference_type(ReferenceType t) { |
| assert(t == (u1)t, "overflow"); |
| _reference_type = (u1)t; |
| } |
| |
| static ByteSize reference_type_offset() { return in_ByteSize(offset_of(InstanceKlass, _reference_type)); } |
| |
| // find local field, returns true if found |
| bool find_local_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const; |
| // find field in direct superinterfaces, returns the interface in which the field is defined |
| Klass* find_interface_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const; |
| // find field according to JVM spec 5.4.3.2, returns the klass in which the field is defined |
| Klass* find_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const; |
| // find instance or static fields according to JVM spec 5.4.3.2, returns the klass in which the field is defined |
| Klass* find_field(Symbol* name, Symbol* sig, bool is_static, fieldDescriptor* fd) const; |
| |
| // find a non-static or static field given its offset within the class. |
| bool contains_field_offset(int offset) { |
| return instanceOopDesc::contains_field_offset(offset, nonstatic_field_size()); |
| } |
| |
| bool find_local_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const; |
| bool find_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const; |
| |
| // find a local method (returns NULL if not found) |
| Method* find_method(const Symbol* name, const Symbol* signature) const; |
| static Method* find_method(const Array<Method*>* methods, |
| const Symbol* name, |
| const Symbol* signature); |
| |
| // find a local method, but skip static methods |
| Method* find_instance_method(const Symbol* name, const Symbol* signature) const; |
| static Method* find_instance_method(const Array<Method*>* methods, |
| const Symbol* name, |
| const Symbol* signature); |
| |
| // find a local method (returns NULL if not found) |
| Method* find_local_method(const Symbol* name, |
| const Symbol* signature, |
| OverpassLookupMode overpass_mode, |
| StaticLookupMode static_mode, |
| PrivateLookupMode private_mode) const; |
| |
| // find a local method from given methods array (returns NULL if not found) |
| static Method* find_local_method(const Array<Method*>* methods, |
| const Symbol* name, |
| const Symbol* signature, |
| OverpassLookupMode overpass_mode, |
| StaticLookupMode static_mode, |
| PrivateLookupMode private_mode); |
| |
| // find a local method index in methods or default_methods (returns -1 if not found) |
| static int find_method_index(const Array<Method*>* methods, |
| const Symbol* name, |
| const Symbol* signature, |
| OverpassLookupMode overpass_mode, |
| StaticLookupMode static_mode, |
| PrivateLookupMode private_mode); |
| |
| // lookup operation (returns NULL if not found) |
| Method* uncached_lookup_method(const Symbol* name, |
| const Symbol* signature, |
| OverpassLookupMode overpass_mode) const; |
| |
| // lookup a method in all the interfaces that this class implements |
| // (returns NULL if not found) |
| Method* lookup_method_in_all_interfaces(Symbol* name, Symbol* signature, DefaultsLookupMode defaults_mode) const; |
| |
| // lookup a method in local defaults then in all interfaces |
| // (returns NULL if not found) |
| Method* lookup_method_in_ordered_interfaces(Symbol* name, Symbol* signature) const; |
| |
| // Find method indices by name. If a method with the specified name is |
| // found the index to the first method is returned, and 'end' is filled in |
| // with the index of first non-name-matching method. If no method is found |
| // -1 is returned. |
| int find_method_by_name(const Symbol* name, int* end) const; |
| static int find_method_by_name(const Array<Method*>* methods, |
| const Symbol* name, int* end); |
| |
| // constant pool |
| ConstantPool* constants() const { return _constants; } |
| void set_constants(ConstantPool* c) { _constants = c; } |
| |
| // protection domain |
| oop protection_domain() const; |
| |
| // signers |
| objArrayOop signers() const; |
| |
| // host class |
| InstanceKlass* host_klass() const { |
| InstanceKlass** hk = adr_host_klass(); |
| if (hk == NULL) { |
| return NULL; |
| } else { |
| assert(*hk != NULL, "host klass should always be set if the address is not null"); |
| return *hk; |
| } |
| } |
| void set_host_klass(const InstanceKlass* host) { |
| assert(is_anonymous(), "not anonymous"); |
| const InstanceKlass** addr = (const InstanceKlass **)adr_host_klass(); |
| assert(addr != NULL, "no reversed space"); |
| if (addr != NULL) { |
| *addr = host; |
| } |
| } |
| bool is_anonymous() const { |
| return (_misc_flags & _misc_is_anonymous) != 0; |
| } |
| void set_is_anonymous(bool value) { |
| if (value) { |
| _misc_flags |= _misc_is_anonymous; |
| } else { |
| _misc_flags &= ~_misc_is_anonymous; |
| } |
| } |
| |
| // Oop that keeps the metadata for this class from being unloaded |
| // in places where the metadata is stored in other places, like nmethods |
| oop klass_holder() const { |
| return is_anonymous() ? java_mirror() : class_loader(); |
| } |
| |
| bool is_contended() const { |
| return (_misc_flags & _misc_is_contended) != 0; |
| } |
| void set_is_contended(bool value) { |
| if (value) { |
| _misc_flags |= _misc_is_contended; |
| } else { |
| _misc_flags &= ~_misc_is_contended; |
| } |
| } |
| |
| // source file name |
| Symbol* source_file_name() const { |
| return (_source_file_name_index == 0) ? |
| (Symbol*)NULL : _constants->symbol_at(_source_file_name_index); |
| } |
| u2 source_file_name_index() const { |
| return _source_file_name_index; |
| } |
| void set_source_file_name_index(u2 sourcefile_index) { |
| _source_file_name_index = sourcefile_index; |
| } |
| |
| // minor and major version numbers of class file |
| u2 minor_version() const { return _minor_version; } |
| void set_minor_version(u2 minor_version) { _minor_version = minor_version; } |
| u2 major_version() const { return _major_version; } |
| void set_major_version(u2 major_version) { _major_version = major_version; } |
| |
| // source debug extension |
| const char* source_debug_extension() const { return _source_debug_extension; } |
| void set_source_debug_extension(const char* array, int length); |
| |
| // symbol unloading support (refcount already added) |
| Symbol* array_name() { return _array_name; } |
| void set_array_name(Symbol* name) { assert(_array_name == NULL || name == NULL, "name already created"); _array_name = name; } |
| |
| // nonstatic oop-map blocks |
| static int nonstatic_oop_map_size(unsigned int oop_map_count) { |
| return oop_map_count * OopMapBlock::size_in_words(); |
| } |
| unsigned int nonstatic_oop_map_count() const { |
| return _nonstatic_oop_map_size / OopMapBlock::size_in_words(); |
| } |
| int nonstatic_oop_map_size() const { return _nonstatic_oop_map_size; } |
| void set_nonstatic_oop_map_size(int words) { |
| _nonstatic_oop_map_size = words; |
| } |
| |
| #if INCLUDE_JVMTI |
| // Redefinition locking. Class can only be redefined by one thread at a time. |
| bool is_being_redefined() const { return _is_being_redefined; } |
| void set_is_being_redefined(bool value) { _is_being_redefined = value; } |
| |
| // RedefineClasses() support for previous versions: |
| void add_previous_version(instanceKlassHandle ikh, int emcp_method_count); |
| void purge_previous_version_list(); |
| |
| InstanceKlass* previous_versions() const { return _previous_versions; } |
| #else |
| InstanceKlass* previous_versions() const { return NULL; } |
| #endif |
| |
| InstanceKlass* get_klass_version(int version) { |
| for (InstanceKlass* ik = this; ik != NULL; ik = ik->previous_versions()) { |
| if (ik->constants()->version() == version) { |
| return ik; |
| } |
| } |
| return NULL; |
| } |
| |
| bool has_been_redefined() const { |
| return (_misc_flags & _misc_has_been_redefined) != 0; |
| } |
| void set_has_been_redefined() { |
| _misc_flags |= _misc_has_been_redefined; |
| } |
| |
| bool has_passed_fingerprint_check() const { |
| return (_misc_flags & _misc_has_passed_fingerprint_check) != 0; |
| } |
| void set_has_passed_fingerprint_check(bool b) { |
| if (b) { |
| _misc_flags |= _misc_has_passed_fingerprint_check; |
| } else { |
| _misc_flags &= ~_misc_has_passed_fingerprint_check; |
| } |
| } |
| bool supers_have_passed_fingerprint_checks(); |
| |
| static bool should_store_fingerprint(); |
| bool has_stored_fingerprint() const; |
| uint64_t get_stored_fingerprint() const; |
| void store_fingerprint(uint64_t fingerprint); |
| |
| bool is_scratch_class() const { |
| return (_misc_flags & _misc_is_scratch_class) != 0; |
| } |
| |
| void set_is_scratch_class() { |
| _misc_flags |= _misc_is_scratch_class; |
| } |
| |
| private: |
| |
| void set_kind(unsigned kind) { |
| assert(kind <= _misc_kind_field_mask, "Invalid InstanceKlass kind"); |
| unsigned fmask = _misc_kind_field_mask << _misc_kind_field_pos; |
| unsigned flags = _misc_flags & ~fmask; |
| _misc_flags = (flags | (kind << _misc_kind_field_pos)); |
| } |
| |
| bool is_kind(unsigned desired) const { |
| unsigned kind = (_misc_flags >> _misc_kind_field_pos) & _misc_kind_field_mask; |
| return kind == desired; |
| } |
| |
| public: |
| |
| // Other is anything that is not one of the more specialized kinds of InstanceKlass. |
| bool is_other_instance_klass() const { return is_kind(_misc_kind_other); } |
| bool is_reference_instance_klass() const { return is_kind(_misc_kind_reference); } |
| bool is_mirror_instance_klass() const { return is_kind(_misc_kind_mirror); } |
| bool is_class_loader_instance_klass() const { return is_kind(_misc_kind_class_loader); } |
| |
| #if INCLUDE_JVMTI |
| |
| void init_previous_versions() { |
| _previous_versions = NULL; |
| } |
| |
| private: |
| static bool _has_previous_versions; |
| public: |
| static void purge_previous_versions(InstanceKlass* ik) { |
| if (ik->has_been_redefined()) { |
| ik->purge_previous_version_list(); |
| } |
| } |
| |
| static bool has_previous_versions_and_reset(); |
| |
| // JVMTI: Support for caching a class file before it is modified by an agent that can do retransformation |
| void set_cached_class_file(JvmtiCachedClassFileData *data) { |
| _cached_class_file = data; |
| } |
| JvmtiCachedClassFileData * get_cached_class_file(); |
| jint get_cached_class_file_len(); |
| unsigned char * get_cached_class_file_bytes(); |
| |
| // JVMTI: Support for caching of field indices, types, and offsets |
| void set_jvmti_cached_class_field_map(JvmtiCachedClassFieldMap* descriptor) { |
| _jvmti_cached_class_field_map = descriptor; |
| } |
| JvmtiCachedClassFieldMap* jvmti_cached_class_field_map() const { |
| return _jvmti_cached_class_field_map; |
| } |
| |
| #if INCLUDE_CDS |
| void set_archived_class_data(JvmtiCachedClassFileData* data) { |
| _cached_class_file = data; |
| } |
| |
| JvmtiCachedClassFileData * get_archived_class_data(); |
| #endif // INCLUDE_CDS |
| #else // INCLUDE_JVMTI |
| |
| static void purge_previous_versions(InstanceKlass* ik) { return; }; |
| static bool has_previous_versions_and_reset() { return false; } |
| |
| void set_cached_class_file(JvmtiCachedClassFileData *data) { |
| assert(data == NULL, "unexpected call with JVMTI disabled"); |
| } |
| JvmtiCachedClassFileData * get_cached_class_file() { return (JvmtiCachedClassFileData *)NULL; } |
| |
| #endif // INCLUDE_JVMTI |
| |
| bool has_nonstatic_concrete_methods() const { |
| return (_misc_flags & _misc_has_nonstatic_concrete_methods) != 0; |
| } |
| void set_has_nonstatic_concrete_methods(bool b) { |
| if (b) { |
| _misc_flags |= _misc_has_nonstatic_concrete_methods; |
| } else { |
| _misc_flags &= ~_misc_has_nonstatic_concrete_methods; |
| } |
| } |
| |
| bool declares_nonstatic_concrete_methods() const { |
| return (_misc_flags & _misc_declares_nonstatic_concrete_methods) != 0; |
| } |
| void set_declares_nonstatic_concrete_methods(bool b) { |
| if (b) { |
| _misc_flags |= _misc_declares_nonstatic_concrete_methods; |
| } else { |
| _misc_flags &= ~_misc_declares_nonstatic_concrete_methods; |
| } |
| } |
| |
| // for adding methods, ConstMethod::UNSET_IDNUM means no more ids available |
| inline u2 next_method_idnum(); |
| void set_initial_method_idnum(u2 value) { _idnum_allocated_count = value; } |
| |
| // generics support |
| Symbol* generic_signature() const { |
| return (_generic_signature_index == 0) ? |
| (Symbol*)NULL : _constants->symbol_at(_generic_signature_index); |
| } |
| u2 generic_signature_index() const { |
| return _generic_signature_index; |
| } |
| void set_generic_signature_index(u2 sig_index) { |
| _generic_signature_index = sig_index; |
| } |
| |
| u2 enclosing_method_data(int offset) const; |
| u2 enclosing_method_class_index() const { |
| return enclosing_method_data(enclosing_method_class_index_offset); |
| } |
| u2 enclosing_method_method_index() { |
| return enclosing_method_data(enclosing_method_method_index_offset); |
| } |
| void set_enclosing_method_indices(u2 class_index, |
| u2 method_index); |
| |
| // jmethodID support |
| static jmethodID get_jmethod_id(instanceKlassHandle ik_h, |
| const methodHandle& method_h); |
| static jmethodID get_jmethod_id_fetch_or_update(instanceKlassHandle ik_h, |
| size_t idnum, jmethodID new_id, jmethodID* new_jmeths, |
| jmethodID* to_dealloc_id_p, |
| jmethodID** to_dealloc_jmeths_p); |
| static void get_jmethod_id_length_value(jmethodID* cache, size_t idnum, |
| size_t *length_p, jmethodID* id_p); |
| void ensure_space_for_methodids(int start_offset = 0); |
| jmethodID jmethod_id_or_null(Method* method); |
| |
| // annotations support |
| Annotations* annotations() const { return _annotations; } |
| void set_annotations(Annotations* anno) { _annotations = anno; } |
| |
| AnnotationArray* class_annotations() const { |
| return (_annotations != NULL) ? _annotations->class_annotations() : NULL; |
| } |
| Array<AnnotationArray*>* fields_annotations() const { |
| return (_annotations != NULL) ? _annotations->fields_annotations() : NULL; |
| } |
| AnnotationArray* class_type_annotations() const { |
| return (_annotations != NULL) ? _annotations->class_type_annotations() : NULL; |
| } |
| Array<AnnotationArray*>* fields_type_annotations() const { |
| return (_annotations != NULL) ? _annotations->fields_type_annotations() : NULL; |
| } |
| // allocation |
| instanceOop allocate_instance(TRAPS); |
| |
| // additional member function to return a handle |
| instanceHandle allocate_instance_handle(TRAPS) { return instanceHandle(THREAD, allocate_instance(THREAD)); } |
| |
| objArrayOop allocate_objArray(int n, int length, TRAPS); |
| // Helper function |
| static instanceOop register_finalizer(instanceOop i, TRAPS); |
| |
| // Check whether reflection/jni/jvm code is allowed to instantiate this class; |
| // if not, throw either an Error or an Exception. |
| virtual void check_valid_for_instantiation(bool throwError, TRAPS); |
| |
| // initialization |
| void call_class_initializer(TRAPS); |
| void set_initialization_state_and_notify(ClassState state, TRAPS); |
| |
| // OopMapCache support |
| OopMapCache* oop_map_cache() { return _oop_map_cache; } |
| void set_oop_map_cache(OopMapCache *cache) { _oop_map_cache = cache; } |
| void mask_for(const methodHandle& method, int bci, InterpreterOopMap* entry); |
| |
| // JNI identifier support (for static fields - for jni performance) |
| JNIid* jni_ids() { return _jni_ids; } |
| void set_jni_ids(JNIid* ids) { _jni_ids = ids; } |
| JNIid* jni_id_for(int offset); |
| |
| // maintenance of deoptimization dependencies |
| inline DependencyContext dependencies(); |
| int mark_dependent_nmethods(KlassDepChange& changes); |
| void add_dependent_nmethod(nmethod* nm); |
| void remove_dependent_nmethod(nmethod* nm, bool delete_immediately); |
| |
| // On-stack replacement support |
| nmethod* osr_nmethods_head() const { return _osr_nmethods_head; }; |
| void set_osr_nmethods_head(nmethod* h) { _osr_nmethods_head = h; }; |
| void add_osr_nmethod(nmethod* n); |
| bool remove_osr_nmethod(nmethod* n); |
| int mark_osr_nmethods(const Method* m); |
| nmethod* lookup_osr_nmethod(const Method* m, int bci, int level, bool match_level) const; |
| |
| #if INCLUDE_JVMTI |
| // Breakpoint support (see methods on Method* for details) |
| BreakpointInfo* breakpoints() const { return _breakpoints; }; |
| void set_breakpoints(BreakpointInfo* bps) { _breakpoints = bps; }; |
| #endif |
| |
| // support for stub routines |
| static ByteSize init_state_offset() { return in_ByteSize(offset_of(InstanceKlass, _init_state)); } |
| TRACE_DEFINE_KLASS_TRACE_ID_OFFSET; |
| static ByteSize init_thread_offset() { return in_ByteSize(offset_of(InstanceKlass, _init_thread)); } |
| |
| // subclass/subinterface checks |
| bool implements_interface(Klass* k) const; |
| bool is_same_or_direct_interface(Klass* k) const; |
| |
| #ifdef ASSERT |
| // check whether this class or one of its superclasses was redefined |
| bool has_redefined_this_or_super() const; |
| #endif |
| |
| // Access to the implementor of an interface. |
| Klass* implementor() const |
| { |
| Klass** k = adr_implementor(); |
| if (k == NULL) { |
| return NULL; |
| } else { |
| return *k; |
| } |
| } |
| |
| void set_implementor(Klass* k) { |
| assert(is_interface(), "not interface"); |
| Klass** addr = adr_implementor(); |
| assert(addr != NULL, "null addr"); |
| if (addr != NULL) { |
| *addr = k; |
| } |
| } |
| |
| int nof_implementors() const { |
| Klass* k = implementor(); |
| if (k == NULL) { |
| return 0; |
| } else if (k != this) { |
| return 1; |
| } else { |
| return 2; |
| } |
| } |
| |
| void add_implementor(Klass* k); // k is a new class that implements this interface |
| void init_implementor(); // initialize |
| |
| // link this class into the implementors list of every interface it implements |
| void process_interfaces(Thread *thread); |
| |
| // virtual operations from Klass |
| bool is_leaf_class() const { return _subklass == NULL; } |
| GrowableArray<Klass*>* compute_secondary_supers(int num_extra_slots); |
| bool compute_is_subtype_of(Klass* k); |
| bool can_be_primary_super_slow() const; |
| int oop_size(oop obj) const { return size_helper(); } |
| // slow because it's a virtual call and used for verifying the layout_helper. |
| // Using the layout_helper bits, we can call is_instance_klass without a virtual call. |
| DEBUG_ONLY(bool is_instance_klass_slow() const { return true; }) |
| |
| // Iterators |
| void do_local_static_fields(FieldClosure* cl); |
| void do_nonstatic_fields(FieldClosure* cl); // including inherited fields |
| void do_local_static_fields(void f(fieldDescriptor*, Handle, TRAPS), Handle, TRAPS); |
| |
| void methods_do(void f(Method* method)); |
| void array_klasses_do(void f(Klass* k)); |
| void array_klasses_do(void f(Klass* k, TRAPS), TRAPS); |
| bool super_types_do(SuperTypeClosure* blk); |
| |
| static InstanceKlass* cast(Klass* k) { |
| return const_cast<InstanceKlass*>(cast(const_cast<const Klass*>(k))); |
| } |
| |
| static const InstanceKlass* cast(const Klass* k) { |
| assert(k != NULL, "k should not be null"); |
| assert(k->is_instance_klass(), "cast to InstanceKlass"); |
| return static_cast<const InstanceKlass*>(k); |
| } |
| |
| InstanceKlass* java_super() const { |
| return (super() == NULL) ? NULL : cast(super()); |
| } |
| |
| // Sizing (in words) |
| static int header_size() { return sizeof(InstanceKlass)/wordSize; } |
| |
| static int size(int vtable_length, int itable_length, |
| int nonstatic_oop_map_size, |
| bool is_interface, bool is_anonymous, bool has_stored_fingerprint) { |
| return align_metadata_size(header_size() + |
| vtable_length + |
| itable_length + |
| nonstatic_oop_map_size + |
| (is_interface ? (int)sizeof(Klass*)/wordSize : 0) + |
| (is_anonymous ? (int)sizeof(Klass*)/wordSize : 0) + |
| (has_stored_fingerprint ? (int)sizeof(uint64_t*)/wordSize : 0)); |
| } |
| int size() const { return size(vtable_length(), |
| itable_length(), |
| nonstatic_oop_map_size(), |
| is_interface(), |
| is_anonymous(), |
| has_stored_fingerprint()); |
| } |
| #if INCLUDE_SERVICES |
| virtual void collect_statistics(KlassSizeStats *sz) const; |
| #endif |
| |
| intptr_t* start_of_itable() const { return (intptr_t*)start_of_vtable() + vtable_length(); } |
| intptr_t* end_of_itable() const { return start_of_itable() + itable_length(); } |
| |
| int itable_offset_in_words() const { return start_of_itable() - (intptr_t*)this; } |
| |
| address static_field_addr(int offset); |
| |
| OopMapBlock* start_of_nonstatic_oop_maps() const { |
| return (OopMapBlock*)(start_of_itable() + itable_length()); |
| } |
| |
| Klass** end_of_nonstatic_oop_maps() const { |
| return (Klass**)(start_of_nonstatic_oop_maps() + |
| nonstatic_oop_map_count()); |
| } |
| |
| Klass** adr_implementor() const { |
| if (is_interface()) { |
| return (Klass**)end_of_nonstatic_oop_maps(); |
| } else { |
| return NULL; |
| } |
| }; |
| |
| InstanceKlass** adr_host_klass() const { |
| if (is_anonymous()) { |
| InstanceKlass** adr_impl = (InstanceKlass **)adr_implementor(); |
| if (adr_impl != NULL) { |
| return adr_impl + 1; |
| } else { |
| return (InstanceKlass **)end_of_nonstatic_oop_maps(); |
| } |
| } else { |
| return NULL; |
| } |
| } |
| |
| address adr_fingerprint() const { |
| if (has_stored_fingerprint()) { |
| InstanceKlass** adr_host = adr_host_klass(); |
| if (adr_host != NULL) { |
| return (address)(adr_host + 1); |
| } |
| |
| Klass** adr_impl = adr_implementor(); |
| if (adr_impl != NULL) { |
| return (address)(adr_impl + 1); |
| } |
| |
| return (address)end_of_nonstatic_oop_maps(); |
| } else { |
| return NULL; |
| } |
| } |
| |
| // Use this to return the size of an instance in heap words: |
| int size_helper() const { |
| return layout_helper_to_size_helper(layout_helper()); |
| } |
| |
| // This bit is initialized in classFileParser.cpp. |
| // It is false under any of the following conditions: |
| // - the class is abstract (including any interface) |
| // - the class has a finalizer (if !RegisterFinalizersAtInit) |
| // - the class size is larger than FastAllocateSizeLimit |
| // - the class is java/lang/Class, which cannot be allocated directly |
| bool can_be_fastpath_allocated() const { |
| return !layout_helper_needs_slow_path(layout_helper()); |
| } |
| |
| // Java itable |
| klassItable* itable() const; // return new klassItable wrapper |
| Method* method_at_itable(Klass* holder, int index, TRAPS); |
| |
| #if INCLUDE_JVMTI |
| void adjust_default_methods(InstanceKlass* holder, bool* trace_name_printed); |
| #endif // INCLUDE_JVMTI |
| |
| void clean_weak_instanceklass_links(BoolObjectClosure* is_alive); |
| void clean_implementors_list(BoolObjectClosure* is_alive); |
| void clean_method_data(BoolObjectClosure* is_alive); |
| |
| // Explicit metaspace deallocation of fields |
| // For RedefineClasses and class file parsing errors, we need to deallocate |
| // instanceKlasses and the metadata they point to. |
| void deallocate_contents(ClassLoaderData* loader_data); |
| static void deallocate_methods(ClassLoaderData* loader_data, |
| Array<Method*>* methods); |
| void static deallocate_interfaces(ClassLoaderData* loader_data, |
| const Klass* super_klass, |
| Array<Klass*>* local_interfaces, |
| Array<Klass*>* transitive_interfaces); |
| |
| // The constant pool is on stack if any of the methods are executing or |
| // referenced by handles. |
| bool on_stack() const { return _constants->on_stack(); } |
| |
| // callbacks for actions during class unloading |
| static void notify_unload_class(InstanceKlass* ik); |
| static void release_C_heap_structures(InstanceKlass* ik); |
| |
| // Naming |
| const char* signature_name() const; |
| static Symbol* package_from_name(const Symbol* name, TRAPS); |
| |
| // GC specific object visitors |
| // |
| // Mark Sweep |
| int oop_ms_adjust_pointers(oop obj); |
| #if INCLUDE_ALL_GCS |
| // Parallel Scavenge |
| void oop_ps_push_contents( oop obj, PSPromotionManager* pm); |
| // Parallel Compact |
| void oop_pc_follow_contents(oop obj, ParCompactionManager* cm); |
| void oop_pc_update_pointers(oop obj, ParCompactionManager* cm); |
| #endif |
| |
| // Oop fields (and metadata) iterators |
| // [nv = true] Use non-virtual calls to do_oop_nv. |
| // [nv = false] Use virtual calls to do_oop. |
| // |
| // The InstanceKlass iterators also visits the Object's klass. |
| |
| // Forward iteration |
| public: |
| // Iterate over all oop fields in the oop maps. |
| template <bool nv, class OopClosureType> |
| inline void oop_oop_iterate_oop_maps(oop obj, OopClosureType* closure); |
| |
| protected: |
| // Iterate over all oop fields and metadata. |
| template <bool nv, class OopClosureType> |
| inline int oop_oop_iterate(oop obj, OopClosureType* closure); |
| |
| private: |
| // Iterate over all oop fields in the oop maps. |
| // Specialized for [T = oop] or [T = narrowOop]. |
| template <bool nv, typename T, class OopClosureType> |
| inline void oop_oop_iterate_oop_maps_specialized(oop obj, OopClosureType* closure); |
| |
| // Iterate over all oop fields in one oop map. |
| template <bool nv, typename T, class OopClosureType> |
| inline void oop_oop_iterate_oop_map(OopMapBlock* map, oop obj, OopClosureType* closure); |
| |
| |
| // Reverse iteration |
| #if INCLUDE_ALL_GCS |
| public: |
| // Iterate over all oop fields in the oop maps. |
| template <bool nv, class OopClosureType> |
| inline void oop_oop_iterate_oop_maps_reverse(oop obj, OopClosureType* closure); |
| |
| protected: |
| // Iterate over all oop fields and metadata. |
| template <bool nv, class OopClosureType> |
| inline int oop_oop_iterate_reverse(oop obj, OopClosureType* closure); |
| |
| private: |
| // Iterate over all oop fields in the oop maps. |
| // Specialized for [T = oop] or [T = narrowOop]. |
| template <bool nv, typename T, class OopClosureType> |
| inline void oop_oop_iterate_oop_maps_specialized_reverse(oop obj, OopClosureType* closure); |
| |
| // Iterate over all oop fields in one oop map. |
| template <bool nv, typename T, class OopClosureType> |
| inline void oop_oop_iterate_oop_map_reverse(OopMapBlock* map, oop obj, OopClosureType* closure); |
| #endif |
| |
| |
| // Bounded range iteration |
| public: |
| // Iterate over all oop fields in the oop maps. |
| template <bool nv, class OopClosureType> |
| inline void oop_oop_iterate_oop_maps_bounded(oop obj, OopClosureType* closure, MemRegion mr); |
| |
| protected: |
| // Iterate over all oop fields and metadata. |
| template <bool nv, class OopClosureType> |
| inline int oop_oop_iterate_bounded(oop obj, OopClosureType* closure, MemRegion mr); |
| |
| private: |
| // Iterate over all oop fields in the oop maps. |
| // Specialized for [T = oop] or [T = narrowOop]. |
| template <bool nv, typename T, class OopClosureType> |
| inline void oop_oop_iterate_oop_maps_specialized_bounded(oop obj, OopClosureType* closure, MemRegion mr); |
| |
| // Iterate over all oop fields in one oop map. |
| template <bool nv, typename T, class OopClosureType> |
| inline void oop_oop_iterate_oop_map_bounded(OopMapBlock* map, oop obj, OopClosureType* closure, MemRegion mr); |
| |
| |
| public: |
| |
| ALL_OOP_OOP_ITERATE_CLOSURES_1(OOP_OOP_ITERATE_DECL) |
| ALL_OOP_OOP_ITERATE_CLOSURES_2(OOP_OOP_ITERATE_DECL) |
| |
| #if INCLUDE_ALL_GCS |
| ALL_OOP_OOP_ITERATE_CLOSURES_1(OOP_OOP_ITERATE_DECL_BACKWARDS) |
| ALL_OOP_OOP_ITERATE_CLOSURES_2(OOP_OOP_ITERATE_DECL_BACKWARDS) |
| #endif // INCLUDE_ALL_GCS |
| |
| u2 idnum_allocated_count() const { return _idnum_allocated_count; } |
| |
| public: |
| void set_in_error_state() { |
| assert(DumpSharedSpaces, "only call this when dumping archive"); |
| _init_state = initialization_error; |
| } |
| bool check_sharing_error_state(); |
| |
| private: |
| // initialization state |
| #ifdef ASSERT |
| void set_init_state(ClassState state); |
| #else |
| void set_init_state(ClassState state) { _init_state = (u1)state; } |
| #endif |
| void set_rewritten() { _misc_flags |= _misc_rewritten; } |
| void set_init_thread(Thread *thread) { _init_thread = thread; } |
| |
| // The RedefineClasses() API can cause new method idnums to be needed |
| // which will cause the caches to grow. Safety requires different |
| // cache management logic if the caches can grow instead of just |
| // going from NULL to non-NULL. |
| bool idnum_can_increment() const { return has_been_redefined(); } |
| inline jmethodID* methods_jmethod_ids_acquire() const; |
| inline void release_set_methods_jmethod_ids(jmethodID* jmeths); |
| |
| // Lock during initialization |
| public: |
| // Lock for (1) initialization; (2) access to the ConstantPool of this class. |
| // Must be one per class and it has to be a VM internal object so java code |
| // cannot lock it (like the mirror). |
| // It has to be an object not a Mutex because it's held through java calls. |
| oop init_lock() const; |
| private: |
| void fence_and_clear_init_lock(); |
| |
| // Static methods that are used to implement member methods where an exposed this pointer |
| // is needed due to possible GCs |
| static bool link_class_impl (instanceKlassHandle this_k, bool throw_verifyerror, TRAPS); |
| static bool verify_code (instanceKlassHandle this_k, bool throw_verifyerror, TRAPS); |
| static void initialize_impl (instanceKlassHandle this_k, TRAPS); |
| static void initialize_super_interfaces (instanceKlassHandle this_k, TRAPS); |
| static void eager_initialize_impl (instanceKlassHandle this_k); |
| static void set_initialization_state_and_notify_impl (instanceKlassHandle this_k, ClassState state, TRAPS); |
| static void call_class_initializer_impl (instanceKlassHandle this_k, TRAPS); |
| static Klass* array_klass_impl (instanceKlassHandle this_k, bool or_null, int n, TRAPS); |
| static void do_local_static_fields_impl (instanceKlassHandle this_k, void f(fieldDescriptor* fd, Handle, TRAPS), Handle, TRAPS); |
| /* jni_id_for_impl for jfieldID only */ |
| static JNIid* jni_id_for_impl (instanceKlassHandle this_k, int offset); |
| |
| // Returns the array class for the n'th dimension |
| Klass* array_klass_impl(bool or_null, int n, TRAPS); |
| |
| // Returns the array class with this class as element type |
| Klass* array_klass_impl(bool or_null, TRAPS); |
| |
| // find a local method (returns NULL if not found) |
| Method* find_method_impl(const Symbol* name, |
| const Symbol* signature, |
| OverpassLookupMode overpass_mode, |
| StaticLookupMode static_mode, |
| PrivateLookupMode private_mode) const; |
| |
| static Method* find_method_impl(const Array<Method*>* methods, |
| const Symbol* name, |
| const Symbol* signature, |
| OverpassLookupMode overpass_mode, |
| StaticLookupMode static_mode, |
| PrivateLookupMode private_mode); |
| |
| // Free CHeap allocated fields. |
| void release_C_heap_structures(); |
| |
| #if INCLUDE_JVMTI |
| // RedefineClasses support |
| void link_previous_versions(InstanceKlass* pv) { _previous_versions = pv; } |
| void mark_newly_obsolete_methods(Array<Method*>* old_methods, int emcp_method_count); |
| #endif |
| public: |
| // CDS support - remove and restore oops from metadata. Oops are not shared. |
| virtual void remove_unshareable_info(); |
| virtual void restore_unshareable_info(ClassLoaderData* loader_data, Handle protection_domain, TRAPS); |
| |
| // jvm support |
| jint compute_modifier_flags(TRAPS) const; |
| |
| // JSR-292 support |
| MemberNameTable* member_names() { return _member_names; } |
| void set_member_names(MemberNameTable* member_names) { _member_names = member_names; } |
| bool add_member_name(Handle member_name); |
| |
| public: |
| // JVMTI support |
| jint jvmti_class_status() const; |
| |
| public: |
| // Printing |
| #ifndef PRODUCT |
| void print_on(outputStream* st) const; |
| #endif |
| void print_value_on(outputStream* st) const; |
| |
| void oop_print_value_on(oop obj, outputStream* st); |
| |
| #ifndef PRODUCT |
| void oop_print_on (oop obj, outputStream* st); |
| |
| void print_dependent_nmethods(bool verbose = false); |
| bool is_dependent_nmethod(nmethod* nm); |
| #endif |
| |
| const char* internal_name() const; |
| |
| // Verification |
| void verify_on(outputStream* st); |
| |
| void oop_verify_on(oop obj, outputStream* st); |
| |
| // Logging |
| void print_loading_log(LogLevel::type type, ClassLoaderData* loader_data, |
| const char* module_name, const ClassFileStream* cfs) const; |
| }; |
| |
| // for adding methods |
| // UNSET_IDNUM return means no more ids available |
| inline u2 InstanceKlass::next_method_idnum() { |
| if (_idnum_allocated_count == ConstMethod::MAX_IDNUM) { |
| return ConstMethod::UNSET_IDNUM; // no more ids available |
| } else { |
| return _idnum_allocated_count++; |
| } |
| } |
| |
| |
| /* JNIid class for jfieldIDs only */ |
| class JNIid: public CHeapObj<mtClass> { |
| friend class VMStructs; |
| private: |
| Klass* _holder; |
| JNIid* _next; |
| int _offset; |
| #ifdef ASSERT |
| bool _is_static_field_id; |
| #endif |
| |
| public: |
| // Accessors |
| Klass* holder() const { return _holder; } |
| int offset() const { return _offset; } |
| JNIid* next() { return _next; } |
| // Constructor |
| JNIid(Klass* holder, int offset, JNIid* next); |
| // Identifier lookup |
| JNIid* find(int offset); |
| |
| bool find_local_field(fieldDescriptor* fd) { |
| return InstanceKlass::cast(holder())->find_local_field_from_offset(offset(), true, fd); |
| } |
| |
| static void deallocate(JNIid* id); |
| // Debugging |
| #ifdef ASSERT |
| bool is_static_field_id() const { return _is_static_field_id; } |
| void set_is_static_field_id() { _is_static_field_id = true; } |
| #endif |
| void verify(Klass* holder); |
| }; |
| |
| // An iterator that's used to access the inner classes indices in the |
| // InstanceKlass::_inner_classes array. |
| class InnerClassesIterator : public StackObj { |
| private: |
| Array<jushort>* _inner_classes; |
| int _length; |
| int _idx; |
| public: |
| |
| InnerClassesIterator(instanceKlassHandle k) { |
| _inner_classes = k->inner_classes(); |
| if (k->inner_classes() != NULL) { |
| _length = _inner_classes->length(); |
| // The inner class array's length should be the multiple of |
| // inner_class_next_offset if it only contains the InnerClasses |
| // attribute data, or it should be |
| // n*inner_class_next_offset+enclosing_method_attribute_size |
| // if it also contains the EnclosingMethod data. |
| assert((_length % InstanceKlass::inner_class_next_offset == 0 || |
| _length % InstanceKlass::inner_class_next_offset == InstanceKlass::enclosing_method_attribute_size), |
| "just checking"); |
| // Remove the enclosing_method portion if exists. |
| if (_length % InstanceKlass::inner_class_next_offset == InstanceKlass::enclosing_method_attribute_size) { |
| _length -= InstanceKlass::enclosing_method_attribute_size; |
| } |
| } else { |
| _length = 0; |
| } |
| _idx = 0; |
| } |
| |
| int length() const { |
| return _length; |
| } |
| |
| void next() { |
| _idx += InstanceKlass::inner_class_next_offset; |
| } |
| |
| bool done() const { |
| return (_idx >= _length); |
| } |
| |
| u2 inner_class_info_index() const { |
| return _inner_classes->at( |
| _idx + InstanceKlass::inner_class_inner_class_info_offset); |
| } |
| |
| void set_inner_class_info_index(u2 index) { |
| _inner_classes->at_put( |
| _idx + InstanceKlass::inner_class_inner_class_info_offset, index); |
| } |
| |
| u2 outer_class_info_index() const { |
| return _inner_classes->at( |
| _idx + InstanceKlass::inner_class_outer_class_info_offset); |
| } |
| |
| void set_outer_class_info_index(u2 index) { |
| _inner_classes->at_put( |
| _idx + InstanceKlass::inner_class_outer_class_info_offset, index); |
| } |
| |
| u2 inner_name_index() const { |
| return _inner_classes->at( |
| _idx + InstanceKlass::inner_class_inner_name_offset); |
| } |
| |
| void set_inner_name_index(u2 index) { |
| _inner_classes->at_put( |
| _idx + InstanceKlass::inner_class_inner_name_offset, index); |
| } |
| |
| u2 inner_access_flags() const { |
| return _inner_classes->at( |
| _idx + InstanceKlass::inner_class_access_flags_offset); |
| } |
| }; |
| |
| #endif // SHARE_VM_OOPS_INSTANCEKLASS_HPP |
