jdk8-mips64-public/hotspot: src/share/vm/oops/instanceKlass.hpp@bd02caa94611 (annotated)

src/share/vm/oops/instanceKlass.hpp@bd02caa94611 (annotated)

src/share/vm/oops/instanceKlass.hpp

Tue, 28 Jul 2009 12:12:40 -0700

author: xdono
date: Tue, 28 Jul 2009 12:12:40 -0700
changeset 1279: bd02caa94611
parent 1161: be93aad57795
child 1373: b37c246bf7ce
child 1408: ad6585fd4087
permissions: -rw-r--r--

6862919: Update copyright year
Summary: Update copyright for files that have been modified in 2009, up to 07/09
Reviewed-by: tbell, ohair

 /*
  * Copyright 1997-2009 Sun Microsystems, Inc.  All Rights Reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  * CA 95054 USA or visit www.sun.com if you need additional information or
  * have any questions.
  *
  */
 // An instanceKlass is the VM level representation of a Java class.
 // It contains all information needed for at class at execution runtime.
 //  instanceKlass layout:
 //    [header                     ] klassOop
 //    [klass pointer              ] klassOop
 //    [C++ vtbl pointer           ] Klass
 //    [subtype cache              ] Klass
 //    [instance size              ] Klass
 //    [java mirror                ] Klass
 //    [super                      ] Klass
 //    [access_flags               ] Klass
 //    [name                       ] Klass
 //    [first subklass             ] Klass
 //    [next sibling               ] Klass
 //    [array klasses              ]
 //    [methods                    ]
 //    [local interfaces           ]
 //    [transitive interfaces      ]
 //    [number of implementors     ]
 //    [implementors               ] klassOop[2]
 //    [fields                     ]
 //    [constants                  ]
 //    [class loader               ]
 //    [protection domain          ]
 //    [signers                    ]
 //    [source file name           ]
 //    [inner classes              ]
 //    [static field size          ]
 //    [nonstatic field size       ]
 //    [static oop fields size     ]
 //    [nonstatic oop maps size    ]
 //    [has finalize method        ]
 //    [deoptimization mark bit    ]
 //    [initialization state       ]
 //    [initializing thread        ]
 //    [Java vtable length         ]
 //    [oop map cache (stack maps) ]
 //    [EMBEDDED Java vtable             ] size in words = vtable_len
 //    [EMBEDDED static oop fields       ] size in words = static_oop_fields_size
 //    [         static non-oop fields   ] size in words = static_field_size - static_oop_fields_size
 //    [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.
 // forward declaration for class -- see below for definition
 class SuperTypeClosure;
 class OopMapBlock;
 class JNIid;
 class jniIdMapBase;
 class BreakpointInfo;
 class fieldDescriptor;
 class DepChange;
 class nmethodBucket;
 class PreviousVersionNode;
 class JvmtiCachedClassFieldMap;
 // 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
 class instanceKlass: public Klass {
   friend class VMStructs;
  public:
   // 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 {
     unparsable_by_gc = 0,               // object is not yet parsable by gc. Value of _init_state at object allocation.
     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
   };
  public:
   oop* oop_block_beg() const { return adr_array_klasses(); }
   oop* oop_block_end() const { return adr_methods_default_annotations() + 1; }
   enum {
     implementors_limit = 2              // how many implems can we track?
   };
  protected:
   //
   // The oop block.  See comment in klass.hpp before making changes.
   //
   // Array classes holding elements of this class.
   klassOop        _array_klasses;
   // Method array.
   objArrayOop     _methods;
   // Int array containing the original order of method in the class file (for
   // JVMTI).
   typeArrayOop    _method_ordering;
   // Interface (klassOops) this class declares locally to implement.
   objArrayOop     _local_interfaces;
   // Interface (klassOops) this class implements transitively.
   objArrayOop     _transitive_interfaces;
   // Instance and static variable information, 5-tuples of shorts [access, name
   // index, sig index, initval index, offset].
   typeArrayOop    _fields;
   // Constant pool for this class.
   constantPoolOop _constants;
   // Class loader used to load this class, NULL if VM loader used.
   oop             _class_loader;
   // Protection domain.
   oop             _protection_domain;
   // Host class, which grants its access privileges to this class also.
   // This is only non-null for an anonymous class (AnonymousClasses enabled).
   // The host class is either named, or a previously loaded anonymous class.
   klassOop        _host_klass;
   // Class signers.
   objArrayOop     _signers;
   // Name of source file containing this klass, NULL if not specified.
   symbolOop       _source_file_name;
   // the source debug extension for this klass, NULL if not specified.
   symbolOop       _source_debug_extension;
   // inner_classes attribute.
   typeArrayOop    _inner_classes;
   // Implementors of this interface (not valid if it overflows)
   klassOop        _implementors[implementors_limit];
   // Generic signature, or null if none.
   symbolOop       _generic_signature;
   // invokedynamic bootstrap method (a java.dyn.MethodHandle)
   oop             _bootstrap_method;
   // Annotations for this class, or null if none.
   typeArrayOop    _class_annotations;
   // Annotation objects (byte arrays) for fields, or null if no annotations.
   // Indices correspond to entries (not indices) in fields array.
   objArrayOop     _fields_annotations;
   // Annotation objects (byte arrays) for methods, or null if no annotations.
   // Index is the idnum, which is initially the same as the methods array index.
   objArrayOop     _methods_annotations;
   // Annotation objects (byte arrays) for methods' parameters, or null if no
   // such annotations.
   // Index is the idnum, which is initially the same as the methods array index.
   objArrayOop     _methods_parameter_annotations;
   // Annotation objects (byte arrays) for methods' default values, or null if no
   // such annotations.
   // Index is the idnum, which is initially the same as the methods array index.
   objArrayOop     _methods_default_annotations;
   //
   // End of the oop block.
   //
   // 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
   int             _static_oop_field_size;// number of static oop fields in this klass
   int             _nonstatic_oop_map_size;// number of nonstatic oop-map blocks allocated at end of this klass
   bool            _is_marked_dependent;  // used for marking during flushing and deoptimization
   bool            _rewritten;            // methods rewritten.
   bool            _has_nonstatic_fields; // for sizing with UseCompressedOops
   u2              _minor_version;        // minor version number of class file
   u2              _major_version;        // major version number of class file
   ClassState      _init_state;           // state of class
   Thread*         _init_thread;          // Pointer to current thread doing initialization (to handle recusive initialization)
   int             _vtable_len;           // length of Java vtable (in words)
   int             _itable_len;           // length of Java itable (in words)
   ReferenceType   _reference_type;       // reference type
   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*      _methods_jmethod_ids;  // jmethodIDs corresponding to method_idnum, or NULL if none
   int*            _methods_cached_itable_indices;  // itable_index cache for JNI invoke corresponding to methods idnum, or NULL
   nmethodBucket*  _dependencies;         // list of dependent nmethods
   nmethod*        _osr_nmethods_head;    // Head of list of on-stack replacement nmethods for this class
   BreakpointInfo* _breakpoints;          // bpt lists, managed by methodOop
   int             _nof_implementors;     // No of implementors of this interface (zero if not an interface)
   // Array of interesting part(s) of the previous version(s) of this
   // instanceKlass. See PreviousVersionWalker below.
   GrowableArray<PreviousVersionNode *>* _previous_versions;
   u2              _enclosing_method_class_index;  // Constant pool index for class of enclosing method, or 0 if none
   u2              _enclosing_method_method_index; // Constant pool index for name and type of enclosing method, or 0 if none
   // JVMTI fields can be moved to their own structure - see 6315920
   unsigned char * _cached_class_file_bytes;       // JVMTI: cached class file, before retransformable agent modified it in CFLH
   jint            _cached_class_file_len;         // JVMTI: length of above
   JvmtiCachedClassFieldMap* _jvmti_cached_class_field_map;  // JVMTI: used during heap iteration
   volatile u2     _idnum_allocated_count;         // JNI/JVMTI: increments with the addition of methods, old ids don't change
   // embedded Java vtable follows here
   // embedded Java itables follows here
   // embedded static fields follows here
   // embedded nonstatic oop-map blocks follows here
   friend class instanceKlassKlass;
   friend class SystemDictionary;
  public:
   bool has_nonstatic_fields() const        { return _has_nonstatic_fields; }
   void set_has_nonstatic_fields(bool b)    { _has_nonstatic_fields = b; }
   // 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_size() const        { return _static_oop_field_size; }
   void set_static_oop_field_size(int size) { _static_oop_field_size = size; }
   // Java vtable
   int  vtable_length() const               { return _vtable_len; }
   void set_vtable_length(int len)          { _vtable_len = len; }
   // Java itable
   int  itable_length() const               { return _itable_len; }
   void set_itable_length(int len)          { _itable_len = len; }
   // array klasses
   klassOop array_klasses() const           { return _array_klasses; }
   void set_array_klasses(klassOop k)       { oop_store_without_check((oop*) &_array_klasses, (oop) k); }
   // methods
   objArrayOop methods() const              { return _methods; }
   void set_methods(objArrayOop a)          { oop_store_without_check((oop*) &_methods, (oop) a); }
   methodOop method_with_idnum(int idnum);
   // method ordering
   typeArrayOop method_ordering() const     { return _method_ordering; }
   void set_method_ordering(typeArrayOop m) { oop_store_without_check((oop*) &_method_ordering, (oop) m); }
   // interfaces
   objArrayOop local_interfaces() const          { return _local_interfaces; }
   void set_local_interfaces(objArrayOop a)      { oop_store_without_check((oop*) &_local_interfaces, (oop) a); }
   objArrayOop transitive_interfaces() const     { return _transitive_interfaces; }
   void set_transitive_interfaces(objArrayOop a) { oop_store_without_check((oop*) &_transitive_interfaces, (oop) a); }
   // fields
   // Field info extracted from the class file and stored
   // as an array of 7 shorts
   enum FieldOffset {
     access_flags_offset    = 0,
     name_index_offset      = 1,
     signature_index_offset = 2,
     initval_index_offset   = 3,
     low_offset             = 4,
     high_offset            = 5,
     generic_signature_offset = 6,
     next_offset            = 7
   };
   typeArrayOop fields() const              { return _fields; }
   int offset_from_fields( int index ) const {
     return build_int_from_shorts( fields()->ushort_at(index + low_offset),
                                   fields()->ushort_at(index + high_offset) );
   }
   void set_fields(typeArrayOop f)          { oop_store_without_check((oop*) &_fields, (oop) f); }
   // inner classes
   typeArrayOop inner_classes() const       { return _inner_classes; }
   void set_inner_classes(typeArrayOop f)   { oop_store_without_check((oop*) &_inner_classes, (oop) 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
   };
   // method override check
   bool is_override(methodHandle super_method, Handle targetclassloader, symbolHandle targetclassname, TRAPS);
   // package
   bool is_same_class_package(klassOop class2);
   bool is_same_class_package(oop classloader2, symbolOop classname2);
   static bool is_same_class_package(oop class_loader1, symbolOop class_name1, oop class_loader2, symbolOop class_name2);
   // find an enclosing class (defined where original code was, in jvm.cpp!)
   klassOop compute_enclosing_class(symbolOop& simple_name_result, TRAPS) {
     instanceKlassHandle self(THREAD, this->as_klassOop());
     return compute_enclosing_class_impl(self, simple_name_result, THREAD);
   }
   static klassOop compute_enclosing_class_impl(instanceKlassHandle self,
                                                symbolOop& simple_name_result, TRAPS);
   // tell if two classes have the same enclosing class (at package level)
   bool is_same_package_member(klassOop class2, TRAPS) {
     instanceKlassHandle self(THREAD, this->as_klassOop());
     return is_same_package_member_impl(self, class2, THREAD);
   }
   static bool is_same_package_member_impl(instanceKlassHandle self,
                                           klassOop 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; }
   int  get_init_state()                    { return _init_state; } // Useful for debugging
   bool is_rewritten() const                { return _rewritten; }
   // 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);
   methodOop 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 _reference_type; }
   void set_reference_type(ReferenceType t) { _reference_type = t; }
   // find local field, returns true if found
   bool find_local_field(symbolOop name, symbolOop sig, fieldDescriptor* fd) const;
   // find field in direct superinterfaces, returns the interface in which the field is defined
   klassOop find_interface_field(symbolOop name, symbolOop sig, fieldDescriptor* fd) const;
   // find field according to JVM spec 5.4.3.2, returns the klass in which the field is defined
   klassOop find_field(symbolOop name, symbolOop 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
   klassOop find_field(symbolOop name, symbolOop 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)
   methodOop find_method(symbolOop name, symbolOop signature) const;
   static methodOop find_method(objArrayOop methods, symbolOop name, symbolOop signature);
   // lookup operation (returns NULL if not found)
   methodOop uncached_lookup_method(symbolOop name, symbolOop signature) const;
   // lookup a method in all the interfaces that this class implements
   // (returns NULL if not found)
   methodOop lookup_method_in_all_interfaces(symbolOop name, symbolOop signature) const;
   // constant pool
   constantPoolOop constants() const        { return _constants; }
   void set_constants(constantPoolOop c)    { oop_store_without_check((oop*) &_constants, (oop) c); }
   // class loader
   oop class_loader() const                 { return _class_loader; }
   void set_class_loader(oop l)             { oop_store((oop*) &_class_loader, l); }
   // protection domain
   oop protection_domain()                  { return _protection_domain; }
   void set_protection_domain(oop pd)       { oop_store((oop*) &_protection_domain, pd); }
   // host class
   oop host_klass() const                   { return _host_klass; }
   void set_host_klass(oop host)            { oop_store((oop*) &_host_klass, host); }
   bool is_anonymous() const                { return _host_klass != NULL; }
   // signers
   objArrayOop signers() const              { return _signers; }
   void set_signers(objArrayOop s)          { oop_store((oop*) &_signers, oop(s)); }
   // source file name
   symbolOop source_file_name() const       { return _source_file_name; }
   void set_source_file_name(symbolOop n)   { oop_store_without_check((oop*) &_source_file_name, (oop) n); }
   // 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
   symbolOop source_debug_extension() const    { return _source_debug_extension; }
   void set_source_debug_extension(symbolOop n){ oop_store_without_check((oop*) &_source_debug_extension, (oop) n); }
   // nonstatic oop-map blocks
   int nonstatic_oop_map_size() const        { return _nonstatic_oop_map_size; }
   void set_nonstatic_oop_map_size(int size) { _nonstatic_oop_map_size = size; }
   // RedefineClasses() support for previous versions:
   void add_previous_version(instanceKlassHandle ikh, BitMap *emcp_methods,
          int emcp_method_count);
   bool has_previous_version() const;
   void init_previous_versions() {
     _previous_versions = NULL;
   }
   GrowableArray<PreviousVersionNode *>* previous_versions() const {
     return _previous_versions;
   }
   // JVMTI: Support for caching a class file before it is modified by an agent that can do retransformation
   void set_cached_class_file(unsigned char *class_file_bytes,
                              jint class_file_len)     { _cached_class_file_len = class_file_len;
                                                         _cached_class_file_bytes = class_file_bytes; }
   jint get_cached_class_file_len()                    { return _cached_class_file_len; }
   unsigned char * get_cached_class_file_bytes()       { return _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;
   }
   // for adding methods, constMethodOopDesc::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
   symbolOop generic_signature() const                 { return _generic_signature; }
   void set_generic_signature(symbolOop sig)           { oop_store_without_check((oop*)&_generic_signature, (oop)sig); }
   u2 enclosing_method_class_index() const             { return _enclosing_method_class_index; }
   u2 enclosing_method_method_index() const            { return _enclosing_method_method_index; }
   void set_enclosing_method_indices(u2 class_index,
                                     u2 method_index)  { _enclosing_method_class_index  = class_index;
                                                         _enclosing_method_method_index = method_index; }
   // JSR 292 support
   oop bootstrap_method() const                        { return _bootstrap_method; }
   void set_bootstrap_method(oop mh)                   { oop_store(&_bootstrap_method, mh); }
   // jmethodID support
   static jmethodID get_jmethod_id(instanceKlassHandle ik_h, size_t idnum,
                                   jmethodID new_id, jmethodID* new_jmeths);
   static jmethodID jmethod_id_for_impl(instanceKlassHandle ik_h, methodHandle method_h);
   jmethodID jmethod_id_or_null(methodOop method);
   // cached itable index support
   void set_cached_itable_index(size_t idnum, int index);
   int cached_itable_index(size_t idnum);
   // annotations support
   typeArrayOop class_annotations() const              { return _class_annotations; }
   objArrayOop fields_annotations() const              { return _fields_annotations; }
   objArrayOop methods_annotations() const             { return _methods_annotations; }
   objArrayOop methods_parameter_annotations() const   { return _methods_parameter_annotations; }
   objArrayOop methods_default_annotations() const     { return _methods_default_annotations; }
   void set_class_annotations(typeArrayOop md)            { oop_store_without_check((oop*)&_class_annotations, (oop)md); }
   void set_fields_annotations(objArrayOop md)            { set_annotations(md, &_fields_annotations); }
   void set_methods_annotations(objArrayOop md)           { set_annotations(md, &_methods_annotations); }
   void set_methods_parameter_annotations(objArrayOop md) { set_annotations(md, &_methods_parameter_annotations); }
   void set_methods_default_annotations(objArrayOop md)   { set_annotations(md, &_methods_default_annotations); }
   typeArrayOop get_method_annotations_of(int idnum)
                                                 { return get_method_annotations_from(idnum, _methods_annotations); }
   typeArrayOop get_method_parameter_annotations_of(int idnum)
                                                 { return get_method_annotations_from(idnum, _methods_parameter_annotations); }
   typeArrayOop get_method_default_annotations_of(int idnum)
                                                 { return get_method_annotations_from(idnum, _methods_default_annotations); }
   void set_method_annotations_of(int idnum, typeArrayOop anno)
                                                 { set_methods_annotations_of(idnum, anno, &_methods_annotations); }
   void set_method_parameter_annotations_of(int idnum, typeArrayOop anno)
                                                 { set_methods_annotations_of(idnum, anno, &_methods_annotations); }
   void set_method_default_annotations_of(int idnum, typeArrayOop anno)
                                                 { set_methods_annotations_of(idnum, anno, &_methods_annotations); }
   // allocation
   DEFINE_ALLOCATE_PERMANENT(instanceKlass);
   instanceOop allocate_instance(TRAPS);
   instanceOop allocate_permanent_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(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
   int mark_dependent_nmethods(DepChange& changes);
   void add_dependent_nmethod(nmethod* nm);
   void remove_dependent_nmethod(nmethod* nm);
   // 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);
   void remove_osr_nmethod(nmethod* n);
   nmethod* lookup_osr_nmethod(const methodOop m, int bci) const;
   // Breakpoint support (see methods on methodOop for details)
   BreakpointInfo* breakpoints() const       { return _breakpoints; };
   void set_breakpoints(BreakpointInfo* bps) { _breakpoints = bps; };
   // support for stub routines
   static int init_state_offset_in_bytes()    { return offset_of(instanceKlass, _init_state); }
   static int init_thread_offset_in_bytes()   { return offset_of(instanceKlass, _init_thread); }
   // subclass/subinterface checks
   bool implements_interface(klassOop k) const;
   // Access to implementors of an interface. We only store the count
   // of implementors, and in case, there are only a few
   // implementors, we store them in a short list.
   // This accessor returns NULL if we walk off the end of the list.
   klassOop implementor(int i) const {
     return (i < implementors_limit)? _implementors[i]: (klassOop) NULL;
   }
   int  nof_implementors() const       { return _nof_implementors; }
   void add_implementor(klassOop 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; }
   objArrayOop compute_secondary_supers(int num_extra_slots, TRAPS);
   bool compute_is_subtype_of(klassOop k);
   bool can_be_primary_super_slow() const;
   klassOop java_super() const              { return super(); }
   int oop_size(oop obj)  const             { return size_helper(); }
   int klass_oop_size() const               { return object_size(); }
   bool oop_is_instance_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*, TRAPS), TRAPS);
   void methods_do(void f(methodOop method));
   void array_klasses_do(void f(klassOop k));
   void with_array_klasses_do(void f(klassOop k));
   bool super_types_do(SuperTypeClosure* blk);
   // Casting from klassOop
   static instanceKlass* cast(klassOop k) {
     Klass* kp = k->klass_part();
     assert(kp->null_vtbl() || kp->oop_is_instance_slow(), "cast to instanceKlass");
     return (instanceKlass*) kp;
   }
   // Sizing (in words)
   static int header_size()            { return align_object_offset(oopDesc::header_size() + sizeof(instanceKlass)/HeapWordSize); }
   int object_size() const             { return object_size(align_object_offset(vtable_length()) + align_object_offset(itable_length()) + static_field_size() + nonstatic_oop_map_size()); }
   static int vtable_start_offset()    { return header_size(); }
   static int vtable_length_offset()   { return oopDesc::header_size() + offset_of(instanceKlass, _vtable_len) / HeapWordSize; }
   static int object_size(int extra)   { return align_object_size(header_size() + extra); }
   intptr_t* start_of_vtable() const        { return ((intptr_t*)as_klassOop()) + vtable_start_offset(); }
   intptr_t* start_of_itable() const        { return start_of_vtable() + align_object_offset(vtable_length()); }
   int  itable_offset_in_words() const { return start_of_itable() - (intptr_t*)as_klassOop(); }
   // Static field offset is an offset into the Heap, should be converted by
   // based on UseCompressedOop for traversal
   HeapWord* start_of_static_fields() const {
     return (HeapWord*)(start_of_itable() + align_object_offset(itable_length()));
   }
   intptr_t* end_of_itable() const          { return start_of_itable() + itable_length(); }
   int offset_of_static_fields() const {
     return (intptr_t)start_of_static_fields() - (intptr_t)as_klassOop();
   }
   OopMapBlock* start_of_nonstatic_oop_maps() const {
     return (OopMapBlock*) (start_of_static_fields() + static_field_size());
   }
   // Allocation profiling support
   juint alloc_size() const            { return _alloc_count * size_helper(); }
   void set_alloc_size(juint n)        {}
   // 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 vtable/itable
   klassVtable* vtable() const;        // return new klassVtable wrapper
   inline methodOop method_at_vtable(int index);
   klassItable* itable() const;        // return new klassItable wrapper
   methodOop method_at_itable(klassOop holder, int index, TRAPS);
   // Garbage collection
   void oop_follow_contents(oop obj);
   void follow_static_fields();
   void adjust_static_fields();
   int  oop_adjust_pointers(oop obj);
   bool object_is_parsable() const { return _init_state != unparsable_by_gc; }
        // Value of _init_state must be zero (unparsable_by_gc) when klass field is set.
   void follow_weak_klass_links(
     BoolObjectClosure* is_alive, OopClosure* keep_alive);
   void release_C_heap_structures();
   // Parallel Scavenge and Parallel Old
   PARALLEL_GC_DECLS
 #ifndef SERIALGC
   // Parallel Scavenge
   void copy_static_fields(PSPromotionManager* pm);
   void push_static_fields(PSPromotionManager* pm);
   // Parallel Old
   void follow_static_fields(ParCompactionManager* cm);
   void copy_static_fields(ParCompactionManager* cm);
   void update_static_fields();
   void update_static_fields(HeapWord* beg_addr, HeapWord* end_addr);
 #endif // SERIALGC
   // Naming
   char* signature_name() const;
   // Iterators
   int oop_oop_iterate(oop obj, OopClosure* blk) {
     return oop_oop_iterate_v(obj, blk);
   }
   int oop_oop_iterate_m(oop obj, OopClosure* blk, MemRegion mr) {
     return oop_oop_iterate_v_m(obj, blk, mr);
   }
 #define InstanceKlass_OOP_OOP_ITERATE_DECL(OopClosureType, nv_suffix)      \
   int  oop_oop_iterate##nv_suffix(oop obj, OopClosureType* blk);           \
   int  oop_oop_iterate##nv_suffix##_m(oop obj, OopClosureType* blk,        \
                                       MemRegion mr);
   ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_DECL)
   ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_DECL)
 #ifndef SERIALGC
 #define InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DECL(OopClosureType, nv_suffix) \
   int  oop_oop_iterate_backwards##nv_suffix(oop obj, OopClosureType* blk);
   ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DECL)
   ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DECL)
 #endif // !SERIALGC
   void iterate_static_fields(OopClosure* closure);
   void iterate_static_fields(OopClosure* closure, MemRegion mr);
 private:
   // initialization state
 #ifdef ASSERT
   void set_init_state(ClassState state);
 #else
   void set_init_state(ClassState state) { _init_state = state; }
 #endif
   void set_rewritten()                  { _rewritten = true; }
   void set_init_thread(Thread *thread)  { _init_thread = thread; }
   u2 idnum_allocated_count() const      { return _idnum_allocated_count; }
   jmethodID* methods_jmethod_ids_acquire() const
          { return (jmethodID*)OrderAccess::load_ptr_acquire(&_methods_jmethod_ids); }
   void release_set_methods_jmethod_ids(jmethodID* jmeths)
          { OrderAccess::release_store_ptr(&_methods_jmethod_ids, jmeths); }
   int* methods_cached_itable_indices_acquire() const
          { return (int*)OrderAccess::load_ptr_acquire(&_methods_cached_itable_indices); }
   void release_set_methods_cached_itable_indices(int* indices)
          { OrderAccess::release_store_ptr(&_methods_cached_itable_indices, indices); }
   inline typeArrayOop get_method_annotations_from(int idnum, objArrayOop annos);
   void set_annotations(objArrayOop md, objArrayOop* md_p)  { oop_store_without_check((oop*)md_p, (oop)md); }
   void set_methods_annotations_of(int idnum, typeArrayOop anno, objArrayOop* md_p);
   // Offsets for memory management
   oop* adr_array_klasses() const     { return (oop*)&this->_array_klasses;}
   oop* adr_methods() const           { return (oop*)&this->_methods;}
   oop* adr_method_ordering() const   { return (oop*)&this->_method_ordering;}
   oop* adr_local_interfaces() const  { return (oop*)&this->_local_interfaces;}
   oop* adr_transitive_interfaces() const  { return (oop*)&this->_transitive_interfaces;}
   oop* adr_fields() const            { return (oop*)&this->_fields;}
   oop* adr_constants() const         { return (oop*)&this->_constants;}
   oop* adr_class_loader() const      { return (oop*)&this->_class_loader;}
   oop* adr_protection_domain() const { return (oop*)&this->_protection_domain;}
   oop* adr_host_klass() const        { return (oop*)&this->_host_klass;}
   oop* adr_signers() const           { return (oop*)&this->_signers;}
   oop* adr_source_file_name() const  { return (oop*)&this->_source_file_name;}
   oop* adr_source_debug_extension() const { return (oop*)&this->_source_debug_extension;}
   oop* adr_inner_classes() const     { return (oop*)&this->_inner_classes;}
   oop* adr_implementors() const      { return (oop*)&this->_implementors[0];}
   oop* adr_generic_signature() const { return (oop*)&this->_generic_signature;}
   oop* adr_bootstrap_method() const  { return (oop*)&this->_bootstrap_method;}
   oop* adr_methods_jmethod_ids() const             { return (oop*)&this->_methods_jmethod_ids;}
   oop* adr_methods_cached_itable_indices() const   { return (oop*)&this->_methods_cached_itable_indices;}
   oop* adr_class_annotations() const   { return (oop*)&this->_class_annotations;}
   oop* adr_fields_annotations() const  { return (oop*)&this->_fields_annotations;}
   oop* adr_methods_annotations() const { return (oop*)&this->_methods_annotations;}
   oop* adr_methods_parameter_annotations() const { return (oop*)&this->_methods_parameter_annotations;}
   oop* adr_methods_default_annotations() const { return (oop*)&this->_methods_default_annotations;}
   // 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_oop, bool throw_verifyerror, TRAPS);
   static bool verify_code                               (instanceKlassHandle this_oop, bool throw_verifyerror, TRAPS);
   static void initialize_impl                           (instanceKlassHandle this_oop, TRAPS);
   static void eager_initialize_impl                     (instanceKlassHandle this_oop);
   static void set_initialization_state_and_notify_impl  (instanceKlassHandle this_oop, ClassState state, TRAPS);
   static void call_class_initializer_impl               (instanceKlassHandle this_oop, TRAPS);
   static klassOop array_klass_impl                      (instanceKlassHandle this_oop, bool or_null, int n, TRAPS);
   static void do_local_static_fields_impl               (instanceKlassHandle this_oop, void f(fieldDescriptor* fd, TRAPS), TRAPS);
   /* jni_id_for_impl for jfieldID only */
   static JNIid* jni_id_for_impl                         (instanceKlassHandle this_oop, int offset);
   // Returns the array class for the n'th dimension
   klassOop array_klass_impl(bool or_null, int n, TRAPS);
   // Returns the array class with this class as element type
   klassOop array_klass_impl(bool or_null, TRAPS);
 public:
   // sharing support
   virtual void remove_unshareable_info();
   void field_names_and_sigs_iterate(OopClosure* closure);
   // jvm support
   jint compute_modifier_flags(TRAPS) const;
 public:
   // JVMTI support
   jint jvmti_class_status() const;
 #ifndef PRODUCT
  public:
   // Printing
   void oop_print_on      (oop obj, outputStream* st);
   void oop_print_value_on(oop obj, outputStream* st);
   void print_dependent_nmethods(bool verbose = false);
   bool is_dependent_nmethod(nmethod* nm);
 #endif
  public:
   // Verification
   const char* internal_name() const;
   void oop_verify_on(oop obj, outputStream* st);
 #ifndef PRODUCT
   static void verify_class_klass_nonstatic_oop_maps(klassOop k) PRODUCT_RETURN;
 #endif
 };
 inline methodOop instanceKlass::method_at_vtable(int index)  {
 #ifndef PRODUCT
   assert(index >= 0, "valid vtable index");
   if (DebugVtables) {
     verify_vtable_index(index);
   }
 #endif
   vtableEntry* ve = (vtableEntry*)start_of_vtable();
   return ve[index].method();
 }
 inline typeArrayOop instanceKlass::get_method_annotations_from(int idnum, objArrayOop annos) {
   if (annos == NULL || annos->length() <= idnum) {
     return NULL;
   }
   return typeArrayOop(annos->obj_at(idnum));
 }
 // for adding methods
 // UNSET_IDNUM return means no more ids available
 inline u2 instanceKlass::next_method_idnum() {
   if (_idnum_allocated_count == constMethodOopDesc::MAX_IDNUM) {
     return constMethodOopDesc::UNSET_IDNUM; // no more ids available
   } else {
     return _idnum_allocated_count++;
   }
 }
 // ValueObjs embedded in klass. Describes where oops are located in instances of this klass.
 class OopMapBlock VALUE_OBJ_CLASS_SPEC {
  private:
   jushort _offset;    // Offset of first oop in oop-map block
   jushort _length;    // Length of oop-map block
  public:
   // Accessors
   jushort offset() const          { return _offset; }
   void set_offset(jushort offset) { _offset = offset; }
   jushort length() const          { return _length; }
   void set_length(jushort length) { _length = length; }
 };
 /* JNIid class for jfieldIDs only */
 class JNIid: public CHeapObj {
   friend class VMStructs;
  private:
   klassOop           _holder;
   JNIid*             _next;
   int                _offset;
 #ifdef ASSERT
   bool               _is_static_field_id;
 #endif
  public:
   // Accessors
   klassOop holder() const         { return _holder; }
   int offset() const              { return _offset; }
   JNIid* next()                   { return _next; }
   // Constructor
   JNIid(klassOop holder, int offset, JNIid* next);
   // Identifier lookup
   JNIid* find(int offset);
   // Garbage collection support
   oop* holder_addr() { return (oop*)&_holder; }
   void oops_do(OopClosure* f);
   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(klassOop holder);
 };
 // If breakpoints are more numerous than just JVMTI breakpoints,
 // consider compressing this data structure.
 // It is currently a simple linked list defined in methodOop.hpp.
 class BreakpointInfo;
 // A collection point for interesting information about the previous
 // version(s) of an instanceKlass. This class uses weak references to
 // the information so that the information may be collected as needed
 // by the system. If the information is shared, then a regular
 // reference must be used because a weak reference would be seen as
 // collectible. A GrowableArray of PreviousVersionNodes is attached
 // to the instanceKlass as needed. See PreviousVersionWalker below.
 class PreviousVersionNode : public CHeapObj {
  private:
   // A shared ConstantPool is never collected so we'll always have
   // a reference to it so we can update items in the cache. We'll
   // have a weak reference to a non-shared ConstantPool until all
   // of the methods (EMCP or obsolete) have been collected; the
   // non-shared ConstantPool becomes collectible at that point.
   jobject _prev_constant_pool;  // regular or weak reference
   bool    _prev_cp_is_weak;     // true if not a shared ConstantPool
   // If the previous version of the instanceKlass doesn't have any
   // EMCP methods, then _prev_EMCP_methods will be NULL. If all the
   // EMCP methods have been collected, then _prev_EMCP_methods can
   // have a length of zero.
   GrowableArray<jweak>* _prev_EMCP_methods;
 public:
   PreviousVersionNode(jobject prev_constant_pool, bool prev_cp_is_weak,
     GrowableArray<jweak>* prev_EMCP_methods);
   ~PreviousVersionNode();
   jobject prev_constant_pool() const {
     return _prev_constant_pool;
   }
   GrowableArray<jweak>* prev_EMCP_methods() const {
     return _prev_EMCP_methods;
   }
 };
 // A Handle-ized version of PreviousVersionNode.
 class PreviousVersionInfo : public ResourceObj {
  private:
   constantPoolHandle   _prev_constant_pool_handle;
   // If the previous version of the instanceKlass doesn't have any
   // EMCP methods, then _prev_EMCP_methods will be NULL. Since the
   // methods cannot be collected while we hold a handle,
   // _prev_EMCP_methods should never have a length of zero.
   GrowableArray<methodHandle>* _prev_EMCP_method_handles;
 public:
   PreviousVersionInfo(PreviousVersionNode *pv_node);
   ~PreviousVersionInfo();
   constantPoolHandle prev_constant_pool_handle() const {
     return _prev_constant_pool_handle;
   }
   GrowableArray<methodHandle>* prev_EMCP_method_handles() const {
     return _prev_EMCP_method_handles;
   }
 };
 // Helper object for walking previous versions. This helper cleans up
 // the Handles that it allocates when the helper object is destroyed.
 // The PreviousVersionInfo object returned by next_previous_version()
 // is only valid until a subsequent call to next_previous_version() or
 // the helper object is destroyed.
 class PreviousVersionWalker : public StackObj {
  private:
   GrowableArray<PreviousVersionNode *>* _previous_versions;
   int                                   _current_index;
   // Fields for cleaning up when we are done walking the previous versions:
   // A HandleMark for the PreviousVersionInfo handles:
   HandleMark                            _hm;
   // It would be nice to have a ResourceMark field in this helper also,
   // but the ResourceMark code says to be careful to delete handles held
   // in GrowableArrays _before_ deleting the GrowableArray. Since we
   // can't guarantee the order in which the fields are destroyed, we
   // have to let the creator of the PreviousVersionWalker object do
   // the right thing. Also, adding a ResourceMark here causes an
   // include loop.
   // A pointer to the current info object so we can handle the deletes.
   PreviousVersionInfo *                 _current_p;
  public:
   PreviousVersionWalker(instanceKlass *ik);
   ~PreviousVersionWalker();
   // Return the interesting information for the next previous version
   // of the klass. Returns NULL if there are no more previous versions.
   PreviousVersionInfo* next_previous_version();
 };

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/oops/instanceKlass.hpp@bd02caa94611 (annotated)

src/share/vm/oops/instanceKlass.hpp