--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/share/oops/instanceKlass.hpp Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,1501 @@
+/*
+ * Copyright (c) 1997, 2017, 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 "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/align.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 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_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:
+ // If you add a new field that points to any metaspace object, you
+ // must add this field to InstanceKlass::metaspace_pointers_do().
+
+ // 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
+ _misc_has_resolved_methods = 1 << 15 // resolved methods table entries added for this class
+ };
+ 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)
+ 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) {
+ 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 other_class_loader, const Symbol* other_class_name) const;
+
+ // find an enclosing class
+ InstanceKlass* compute_enclosing_class(bool* inner_is_member, TRAPS) const;
+
+ // Find InnerClasses attribute and return outer_class_info_index & inner_name_index.
+ bool find_inner_classes_attr(int* ooff, int* noff, TRAPS) const;
+
+ 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;
+
+ // 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() const;
+
+ // 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(InstanceKlass* ik, 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;
+ }
+
+ bool has_resolved_methods() const {
+ return (_misc_flags & _misc_has_resolved_methods) != 0;
+ }
+
+ void set_has_resolved_methods() {
+ _misc_flags |= _misc_has_resolved_methods;
+ }
+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
+ jmethodID get_jmethod_id(const methodHandle& method_h);
+ jmethodID get_jmethod_id_fetch_or_update(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 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
+ //
+#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();
+
+ bool link_class_impl (bool throw_verifyerror, TRAPS);
+ bool verify_code (bool throw_verifyerror, TRAPS);
+ void initialize_impl (TRAPS);
+ void initialize_super_interfaces (TRAPS);
+ void eager_initialize_impl ();
+ /* jni_id_for_impl for jfieldID only */
+ JNIid* jni_id_for_impl (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 remove_java_mirror();
+ virtual void restore_unshareable_info(ClassLoaderData* loader_data, Handle protection_domain, TRAPS);
+
+ // jvm support
+ jint compute_modifier_flags(TRAPS) const;
+
+public:
+ // JVMTI support
+ jint jvmti_class_status() const;
+
+ virtual void metaspace_pointers_do(MetaspaceClosure* iter);
+
+ 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_class_load_logging(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(const InstanceKlass* 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