8146987: Improve Parallel GC Full GC by caching results of live_words_in_range()
Summary: A large part of time in the parallel scavenge collector is spent finding out the amount of live words within memory ranges to find out where to move an object to. Try to incrementally calculate this value.
Reviewed-by: tschatzl, mgerdin, jmasa
Contributed-by: ray alex <sky1young@gmail.com>
/*
* Copyright (c) 1997, 2016, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*
*/
#ifndef SHARE_VM_OOPS_INSTANCEKLASS_HPP
#define SHARE_VM_OOPS_INSTANCEKLASS_HPP
#include "classfile/classLoaderData.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/bitMap.inline.hpp"
#include "utilities/macros.hpp"
// An InstanceKlass is the VM level representation of a Java class.
// It contains all information needed for at class at execution runtime.
// InstanceKlass embedded field layout (after declared fields):
// [EMBEDDED Java vtable ] size in words = vtable_len
// [EMBEDDED nonstatic oop-map blocks] size in words = nonstatic_oop_map_size
// The embedded nonstatic oop-map blocks are short pairs (offset, length)
// indicating where oops are located in instances of this klass.
// [EMBEDDED implementor of the interface] only exist for interface
// [EMBEDDED host klass ] only exist for an anonymous class (JSR 292 enabled)
// forward declaration for class -- see below for definition
class BreakpointInfo;
class ClassFileParser;
class DepChange;
class DependencyContext;
class fieldDescriptor;
class jniIdMapBase;
class JNIid;
class JvmtiCachedClassFieldMap;
class MemberNameTable;
class SuperTypeClosure;
// This is used in iterators below.
class FieldClosure: public StackObj {
public:
virtual void do_field(fieldDescriptor* fd) = 0;
};
#ifndef PRODUCT
// Print fields.
// If "obj" argument to constructor is NULL, prints static fields, otherwise prints non-static fields.
class FieldPrinter: public FieldClosure {
oop _obj;
outputStream* _st;
public:
FieldPrinter(outputStream* st, oop obj = NULL) : _obj(obj), _st(st) {}
void do_field(fieldDescriptor* fd);
};
#endif // !PRODUCT
// ValueObjs embedded in klass. Describes where oops are located in instances of
// this klass.
class OopMapBlock VALUE_OBJ_CLASS_SPEC {
public:
// Byte offset of the first oop mapped by this block.
int offset() const { return _offset; }
void set_offset(int offset) { _offset = offset; }
// Number of oops in this block.
uint count() const { return _count; }
void set_count(uint count) { _count = count; }
// sizeof(OopMapBlock) in HeapWords.
static const int size_in_words() {
return align_size_up(int(sizeof(OopMapBlock)), HeapWordSize) >>
LogHeapWordSize;
}
private:
int _offset;
uint _count;
};
struct JvmtiCachedClassFileData;
class InstanceKlass: public Klass {
friend class VMStructs;
friend class JVMCIVMStructs;
friend class ClassFileParser;
friend class CompileReplay;
protected:
InstanceKlass(const ClassFileParser& parser, unsigned kind);
public:
InstanceKlass() { assert(DumpSharedSpaces || UseSharedSpaces, "only for CDS"); }
// See "The Java Virtual Machine Specification" section 2.16.2-5 for a detailed description
// of the class loading & initialization procedure, and the use of the states.
enum ClassState {
allocated, // allocated (but not yet linked)
loaded, // loaded and inserted in class hierarchy (but not linked yet)
linked, // successfully linked/verified (but not initialized yet)
being_initialized, // currently running class initializer
fully_initialized, // initialized (successfull final state)
initialization_error // error happened during initialization
};
static int number_of_instance_classes() { return _total_instanceKlass_count; }
private:
static volatile int _total_instanceKlass_count;
static InstanceKlass* allocate_instance_klass(const ClassFileParser& parser, TRAPS);
protected:
// Annotations for this class
Annotations* _annotations;
// Array classes holding elements of this class.
Klass* _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
// _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
// 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_default_methods = 1 << 7, // class/superclass/implemented interfaces has default methods
_misc_declares_default_methods = 1 << 8, // directly declares default methods (any access)
_misc_has_been_redefined = 1 << 9, // class has been redefined
_misc_is_scratch_class = 1 << 10 // class is the redefined scratch 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)
int _vtable_len; // length of Java vtable (in words)
int _itable_len; // length of Java itable (in words)
OopMapCache* volatile _oop_map_cache; // OopMapCache for all methods in the klass (allocated lazily)
MemberNameTable* _member_names; // Member names
JNIid* _jni_ids; // First JNI identifier for static fields in this class
jmethodID* _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
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;
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
JvmtiCachedClassFieldMap* _jvmti_cached_class_field_map; // JVMTI: used during heap iteration
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:
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 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
Klass* array_klasses() const { return _array_klasses; }
void set_array_klasses(Klass* k) { _array_klasses = k; }
// 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
bool is_same_class_package(const Klass* class2) const;
bool is_same_class_package(oop classloader2, const Symbol* classname2) const;
static bool is_same_class_package(oop class_loader1,
const Symbol* class_name1,
oop class_loader2,
const Symbol* class_name2);
// find an enclosing class
InstanceKlass* compute_enclosing_class(bool* inner_is_member, TRAPS) const {
return compute_enclosing_class_impl(this, inner_is_member, THREAD);
}
static InstanceKlass* compute_enclosing_class_impl(const InstanceKlass* self,
bool* inner_is_member,
TRAPS);
// Find InnerClasses attribute for k and return outer_class_info_index & inner_name_index.
static bool find_inner_classes_attr(instanceKlassHandle k,
int* ooff, int* noff, TRAPS);
// tell if two classes have the same enclosing class (at package level)
bool is_same_package_member(const Klass* class2, TRAPS) const {
return is_same_package_member_impl(this, class2, THREAD);
}
static bool is_same_package_member_impl(const InstanceKlass* self,
const Klass* class2,
TRAPS);
// initialization state
bool is_loaded() const { return _init_state >= loaded; }
bool is_linked() const { return _init_state >= linked; }
bool is_initialized() const { return _init_state == fully_initialized; }
bool is_not_initialized() const { return _init_state < being_initialized; }
bool is_being_initialized() const { return _init_state == being_initialized; }
bool is_in_error_state() const { return _init_state == initialization_error; }
bool is_reentrant_initialization(Thread *thread) { return thread == _init_thread; }
ClassState init_state() { return (ClassState)_init_state; }
bool is_rewritten() const { return (_misc_flags & _misc_rewritten) != 0; }
// defineClass specified verification
bool should_verify_class() const {
return (_misc_flags & _misc_should_verify_class) != 0;
}
void set_should_verify_class(bool value) {
if (value) {
_misc_flags |= _misc_should_verify_class;
} else {
_misc_flags &= ~_misc_should_verify_class;
}
}
// marking
bool is_marked_dependent() const { return _is_marked_dependent; }
void set_is_marked_dependent(bool value) { _is_marked_dependent = value; }
// initialization (virtuals from Klass)
bool should_be_initialized() const; // means that initialize should be called
void initialize(TRAPS);
void link_class(TRAPS);
bool link_class_or_fail(TRAPS); // returns false on failure
void unlink_class();
void rewrite_class(TRAPS);
void link_methods(TRAPS);
Method* class_initializer();
// set the class to initialized if no static initializer is present
void eager_initialize(Thread *thread);
// reference type
ReferenceType reference_type() const { return (ReferenceType)_reference_type; }
void set_reference_type(ReferenceType t) {
assert(t == (u1)t, "overflow");
_reference_type = (u1)t;
}
static ByteSize reference_type_offset() { return in_ByteSize(offset_of(InstanceKlass, _reference_type)); }
// find local field, returns true if found
bool find_local_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const;
// find field in direct superinterfaces, returns the interface in which the field is defined
Klass* find_interface_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const;
// find field according to JVM spec 5.4.3.2, returns the klass in which the field is defined
Klass* find_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const;
// find instance or static fields according to JVM spec 5.4.3.2, returns the klass in which the field is defined
Klass* find_field(Symbol* name, Symbol* sig, bool is_static, fieldDescriptor* fd) const;
// find a non-static or static field given its offset within the class.
bool contains_field_offset(int offset) {
return instanceOopDesc::contains_field_offset(offset, nonstatic_field_size());
}
bool find_local_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const;
bool find_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const;
// find a local method (returns NULL if not found)
Method* find_method(const Symbol* name, const Symbol* signature) const;
static Method* find_method(const Array<Method*>* methods,
const Symbol* name,
const Symbol* signature);
// find a local method, but skip static methods
Method* find_instance_method(const Symbol* name, const Symbol* signature) const;
static Method* find_instance_method(const Array<Method*>* methods,
const Symbol* name,
const Symbol* signature);
// find a local method (returns NULL if not found)
Method* find_local_method(const Symbol* name,
const Symbol* signature,
OverpassLookupMode overpass_mode,
StaticLookupMode static_mode,
PrivateLookupMode private_mode) const;
// find a local method from given methods array (returns NULL if not found)
static Method* find_local_method(const Array<Method*>* methods,
const Symbol* name,
const Symbol* signature,
OverpassLookupMode overpass_mode,
StaticLookupMode static_mode,
PrivateLookupMode private_mode);
// find a local method index in methods or default_methods (returns -1 if not found)
static int find_method_index(const Array<Method*>* methods,
const Symbol* name,
const Symbol* signature,
OverpassLookupMode overpass_mode,
StaticLookupMode static_mode,
PrivateLookupMode private_mode);
// lookup operation (returns NULL if not found)
Method* uncached_lookup_method(const Symbol* name,
const Symbol* signature,
OverpassLookupMode overpass_mode) const;
// lookup a method in all the interfaces that this class implements
// (returns NULL if not found)
Method* lookup_method_in_all_interfaces(Symbol* name, Symbol* signature, DefaultsLookupMode defaults_mode) const;
// lookup a method in local defaults then in all interfaces
// (returns NULL if not found)
Method* lookup_method_in_ordered_interfaces(Symbol* name, Symbol* signature) const;
// Find method indices by name. If a method with the specified name is
// found the index to the first method is returned, and 'end' is filled in
// with the index of first non-name-matching method. If no method is found
// -1 is returned.
int find_method_by_name(const Symbol* name, int* end) const;
static int find_method_by_name(const Array<Method*>* methods,
const Symbol* name, int* end);
// constant pool
ConstantPool* constants() const { return _constants; }
void set_constants(ConstantPool* c) { _constants = c; }
// protection domain
oop protection_domain() const;
// signers
objArrayOop signers() const;
// host class
Klass* host_klass() const {
Klass** hk = (Klass**)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 Klass* host) {
assert(is_anonymous(), "not anonymous");
const Klass** addr = (const Klass**)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;
}
// RedefineClasses() support for previous versions:
void add_previous_version(instanceKlassHandle ikh, int emcp_method_count);
InstanceKlass* previous_versions() const { return _previous_versions; }
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 is_scratch_class() const {
return (_misc_flags & _misc_is_scratch_class) != 0;
}
void set_is_scratch_class() {
_misc_flags |= _misc_is_scratch_class;
}
private:
void set_kind(unsigned kind) {
assert(kind <= _misc_kind_field_mask, "Invalid InstanceKlass kind");
unsigned fmask = _misc_kind_field_mask << _misc_kind_field_pos;
unsigned flags = _misc_flags & ~fmask;
_misc_flags = (flags | (kind << _misc_kind_field_pos));
}
bool is_kind(unsigned desired) const {
unsigned kind = (_misc_flags >> _misc_kind_field_pos) & _misc_kind_field_mask;
return kind == desired;
}
public:
// Other is anything that is not one of the more specialized kinds of InstanceKlass.
bool is_other_instance_klass() const { return is_kind(_misc_kind_other); }
bool is_reference_instance_klass() const { return is_kind(_misc_kind_reference); }
bool is_mirror_instance_klass() const { return is_kind(_misc_kind_mirror); }
bool is_class_loader_instance_klass() const { return is_kind(_misc_kind_class_loader); }
void init_previous_versions() {
_previous_versions = NULL;
}
private:
static int _previous_version_count;
public:
static void purge_previous_versions(InstanceKlass* ik);
static bool has_previous_versions() { return _previous_version_count > 0; }
// 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() { return _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;
}
bool has_default_methods() const {
return (_misc_flags & _misc_has_default_methods) != 0;
}
void set_has_default_methods(bool b) {
if (b) {
_misc_flags |= _misc_has_default_methods;
} else {
_misc_flags &= ~_misc_has_default_methods;
}
}
bool declares_default_methods() const {
return (_misc_flags & _misc_declares_default_methods) != 0;
}
void set_declares_default_methods(bool b) {
if (b) {
_misc_flags |= _misc_declares_default_methods;
} else {
_misc_flags &= ~_misc_declares_default_methods;
}
}
// for adding methods, ConstMethod::UNSET_IDNUM means no more ids available
inline u2 next_method_idnum();
void set_initial_method_idnum(u2 value) { _idnum_allocated_count = value; }
// generics support
Symbol* generic_signature() const {
return (_generic_signature_index == 0) ?
(Symbol*)NULL : _constants->symbol_at(_generic_signature_index);
}
u2 generic_signature_index() const {
return _generic_signature_index;
}
void set_generic_signature_index(u2 sig_index) {
_generic_signature_index = sig_index;
}
u2 enclosing_method_data(int offset) const;
u2 enclosing_method_class_index() const {
return enclosing_method_data(enclosing_method_class_index_offset);
}
u2 enclosing_method_method_index() {
return enclosing_method_data(enclosing_method_method_index_offset);
}
void set_enclosing_method_indices(u2 class_index,
u2 method_index);
// jmethodID support
static jmethodID get_jmethod_id(instanceKlassHandle ik_h,
const methodHandle& method_h);
static jmethodID get_jmethod_id_fetch_or_update(instanceKlassHandle ik_h,
size_t idnum, jmethodID new_id, jmethodID* new_jmeths,
jmethodID* to_dealloc_id_p,
jmethodID** to_dealloc_jmeths_p);
static void get_jmethod_id_length_value(jmethodID* cache, size_t idnum,
size_t *length_p, jmethodID* id_p);
void ensure_space_for_methodids(int start_offset = 0);
jmethodID jmethod_id_or_null(Method* method);
// annotations support
Annotations* annotations() const { return _annotations; }
void set_annotations(Annotations* anno) { _annotations = anno; }
AnnotationArray* class_annotations() const {
return (_annotations != NULL) ? _annotations->class_annotations() : NULL;
}
Array<AnnotationArray*>* fields_annotations() const {
return (_annotations != NULL) ? _annotations->fields_annotations() : NULL;
}
AnnotationArray* class_type_annotations() const {
return (_annotations != NULL) ? _annotations->class_type_annotations() : NULL;
}
Array<AnnotationArray*>* fields_type_annotations() const {
return (_annotations != NULL) ? _annotations->fields_type_annotations() : NULL;
}
// allocation
instanceOop allocate_instance(TRAPS);
// additional member function to return a handle
instanceHandle allocate_instance_handle(TRAPS) { return instanceHandle(THREAD, allocate_instance(THREAD)); }
objArrayOop allocate_objArray(int n, int length, TRAPS);
// Helper function
static instanceOop register_finalizer(instanceOop i, TRAPS);
// Check whether reflection/jni/jvm code is allowed to instantiate this class;
// if not, throw either an Error or an Exception.
virtual void check_valid_for_instantiation(bool throwError, TRAPS);
// initialization
void call_class_initializer(TRAPS);
void set_initialization_state_and_notify(ClassState state, TRAPS);
// OopMapCache support
OopMapCache* oop_map_cache() { return _oop_map_cache; }
void set_oop_map_cache(OopMapCache *cache) { _oop_map_cache = cache; }
void mask_for(const methodHandle& method, int bci, InterpreterOopMap* entry);
// JNI identifier support (for static fields - for jni performance)
JNIid* jni_ids() { return _jni_ids; }
void set_jni_ids(JNIid* ids) { _jni_ids = ids; }
JNIid* jni_id_for(int offset);
// maintenance of deoptimization dependencies
inline DependencyContext dependencies();
int mark_dependent_nmethods(DepChange& 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);
void 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;
// Breakpoint support (see methods on Method* for details)
BreakpointInfo* breakpoints() const { return _breakpoints; };
void set_breakpoints(BreakpointInfo* bps) { _breakpoints = bps; };
// support for stub routines
static ByteSize init_state_offset() { return in_ByteSize(offset_of(InstanceKlass, _init_state)); }
TRACE_DEFINE_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)/HeapWordSize; }
static int size(int vtable_length, int itable_length,
int nonstatic_oop_map_size,
bool is_interface, bool is_anonymous) {
return align_object_size(header_size() +
vtable_length +
itable_length +
nonstatic_oop_map_size +
(is_interface ? (int)sizeof(Klass*)/HeapWordSize : 0) +
(is_anonymous ? (int)sizeof(Klass*)/HeapWordSize : 0));
}
int size() const { return size(vtable_length(),
itable_length(),
nonstatic_oop_map_size(),
is_interface(),
is_anonymous());
}
#if INCLUDE_SERVICES
virtual void collect_statistics(KlassSizeStats *sz) const;
#endif
static ByteSize vtable_start_offset() { return in_ByteSize(header_size() * wordSize); }
static ByteSize vtable_length_offset() { return byte_offset_of(InstanceKlass, _vtable_len); }
intptr_t* start_of_vtable() const { return (intptr_t*) ((address)this + in_bytes(vtable_start_offset())); }
intptr_t* start_of_itable() const { return start_of_vtable() + vtable_length(); }
int itable_offset_in_words() const { return start_of_itable() - (intptr_t*)this; }
intptr_t* end_of_itable() const { return start_of_itable() + itable_length(); }
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;
}
};
Klass** adr_host_klass() const {
if (is_anonymous()) {
Klass** adr_impl = adr_implementor();
if (adr_impl != NULL) {
return adr_impl + 1;
} else {
return 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 vtable/itable
klassVtable* vtable() const; // return new klassVtable wrapper
inline Method* method_at_vtable(int index);
klassItable* itable() const; // return new klassItable wrapper
Method* method_at_itable(Klass* holder, int index, TRAPS);
#if INCLUDE_JVMTI
void adjust_default_methods(InstanceKlass* holder, bool* trace_name_printed);
#endif // INCLUDE_JVMTI
void clean_weak_instanceklass_links(BoolObjectClosure* is_alive);
void clean_implementors_list(BoolObjectClosure* is_alive);
void clean_method_data(BoolObjectClosure* is_alive);
// Explicit metaspace deallocation of fields
// For RedefineClasses and class file parsing errors, we need to deallocate
// instanceKlasses and the metadata they point to.
void deallocate_contents(ClassLoaderData* loader_data);
static void deallocate_methods(ClassLoaderData* loader_data,
Array<Method*>* methods);
void static deallocate_interfaces(ClassLoaderData* loader_data,
const Klass* super_klass,
Array<Klass*>* local_interfaces,
Array<Klass*>* transitive_interfaces);
// The constant pool is on stack if any of the methods are executing or
// referenced by handles.
bool on_stack() const { return _constants->on_stack(); }
// callbacks for actions during class unloading
static void notify_unload_class(InstanceKlass* ik);
static void release_C_heap_structures(InstanceKlass* ik);
// Naming
const char* signature_name() const;
// GC specific object visitors
//
// Mark Sweep
int oop_ms_adjust_pointers(oop obj);
#if INCLUDE_ALL_GCS
// Parallel Scavenge
void oop_ps_push_contents( oop obj, PSPromotionManager* pm);
// Parallel Compact
void oop_pc_follow_contents(oop obj, ParCompactionManager* cm);
void oop_pc_update_pointers(oop obj, ParCompactionManager* cm);
#endif
// Oop fields (and metadata) iterators
// [nv = true] Use non-virtual calls to do_oop_nv.
// [nv = false] Use virtual calls to do_oop.
//
// The InstanceKlass iterators also visits the Object's klass.
// Forward iteration
public:
// Iterate over all oop fields in the oop maps.
template <bool nv, class OopClosureType>
inline void oop_oop_iterate_oop_maps(oop obj, OopClosureType* closure);
protected:
// Iterate over all oop fields and metadata.
template <bool nv, class OopClosureType>
inline int oop_oop_iterate(oop obj, OopClosureType* closure);
private:
// Iterate over all oop fields in the oop maps.
// Specialized for [T = oop] or [T = narrowOop].
template <bool nv, typename T, class OopClosureType>
inline void oop_oop_iterate_oop_maps_specialized(oop obj, OopClosureType* closure);
// Iterate over all oop fields in one oop map.
template <bool nv, typename T, class OopClosureType>
inline void oop_oop_iterate_oop_map(OopMapBlock* map, oop obj, OopClosureType* closure);
// Reverse iteration
#if INCLUDE_ALL_GCS
public:
// Iterate over all oop fields in the oop maps.
template <bool nv, class OopClosureType>
inline void oop_oop_iterate_oop_maps_reverse(oop obj, OopClosureType* closure);
protected:
// Iterate over all oop fields and metadata.
template <bool nv, class OopClosureType>
inline int oop_oop_iterate_reverse(oop obj, OopClosureType* closure);
private:
// Iterate over all oop fields in the oop maps.
// Specialized for [T = oop] or [T = narrowOop].
template <bool nv, typename T, class OopClosureType>
inline void oop_oop_iterate_oop_maps_specialized_reverse(oop obj, OopClosureType* closure);
// Iterate over all oop fields in one oop map.
template <bool nv, typename T, class OopClosureType>
inline void oop_oop_iterate_oop_map_reverse(OopMapBlock* map, oop obj, OopClosureType* closure);
#endif
// Bounded range iteration
public:
// Iterate over all oop fields in the oop maps.
template <bool nv, class OopClosureType>
inline void oop_oop_iterate_oop_maps_bounded(oop obj, OopClosureType* closure, MemRegion mr);
protected:
// Iterate over all oop fields and metadata.
template <bool nv, class OopClosureType>
inline int oop_oop_iterate_bounded(oop obj, OopClosureType* closure, MemRegion mr);
private:
// Iterate over all oop fields in the oop maps.
// Specialized for [T = oop] or [T = narrowOop].
template <bool nv, typename T, class OopClosureType>
inline void oop_oop_iterate_oop_maps_specialized_bounded(oop obj, OopClosureType* closure, MemRegion mr);
// Iterate over all oop fields in one oop map.
template <bool nv, typename T, class OopClosureType>
inline void oop_oop_iterate_oop_map_bounded(OopMapBlock* map, oop obj, OopClosureType* closure, MemRegion mr);
public:
ALL_OOP_OOP_ITERATE_CLOSURES_1(OOP_OOP_ITERATE_DECL)
ALL_OOP_OOP_ITERATE_CLOSURES_2(OOP_OOP_ITERATE_DECL)
#if INCLUDE_ALL_GCS
ALL_OOP_OOP_ITERATE_CLOSURES_1(OOP_OOP_ITERATE_DECL_BACKWARDS)
ALL_OOP_OOP_ITERATE_CLOSURES_2(OOP_OOP_ITERATE_DECL_BACKWARDS)
#endif // INCLUDE_ALL_GCS
u2 idnum_allocated_count() const { return _idnum_allocated_count; }
public:
void set_in_error_state() {
assert(DumpSharedSpaces, "only call this when dumping archive");
_init_state = initialization_error;
}
bool check_sharing_error_state();
private:
// initialization state
#ifdef ASSERT
void set_init_state(ClassState state);
#else
void set_init_state(ClassState state) { _init_state = (u1)state; }
#endif
void set_rewritten() { _misc_flags |= _misc_rewritten; }
void set_init_thread(Thread *thread) { _init_thread = thread; }
// The RedefineClasses() API can cause new method idnums to be needed
// which will cause the caches to grow. Safety requires different
// cache management logic if the caches can grow instead of just
// going from NULL to non-NULL.
bool idnum_can_increment() const { return has_been_redefined(); }
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); }
// Lock during initialization
public:
// Lock for (1) initialization; (2) access to the ConstantPool of this class.
// Must be one per class and it has to be a VM internal object so java code
// cannot lock it (like the mirror).
// It has to be an object not a Mutex because it's held through java calls.
oop init_lock() const;
private:
void fence_and_clear_init_lock();
// Static methods that are used to implement member methods where an exposed this pointer
// is needed due to possible GCs
static bool link_class_impl (instanceKlassHandle this_k, bool throw_verifyerror, TRAPS);
static bool verify_code (instanceKlassHandle this_k, bool throw_verifyerror, TRAPS);
static void initialize_impl (instanceKlassHandle this_k, TRAPS);
static void initialize_super_interfaces (instanceKlassHandle this_k, TRAPS);
static void eager_initialize_impl (instanceKlassHandle this_k);
static void set_initialization_state_and_notify_impl (instanceKlassHandle this_k, ClassState state, TRAPS);
static void call_class_initializer_impl (instanceKlassHandle this_k, TRAPS);
static Klass* array_klass_impl (instanceKlassHandle this_k, bool or_null, int n, TRAPS);
static void do_local_static_fields_impl (instanceKlassHandle this_k, void f(fieldDescriptor* fd, Handle, TRAPS), Handle, TRAPS);
/* jni_id_for_impl for jfieldID only */
static JNIid* jni_id_for_impl (instanceKlassHandle this_k, int offset);
// Returns the array class for the n'th dimension
Klass* array_klass_impl(bool or_null, int n, TRAPS);
// Returns the array class with this class as element type
Klass* array_klass_impl(bool or_null, TRAPS);
// find a local method (returns NULL if not found)
Method* find_method_impl(const Symbol* name,
const Symbol* signature,
OverpassLookupMode overpass_mode,
StaticLookupMode static_mode,
PrivateLookupMode private_mode) const;
static Method* find_method_impl(const Array<Method*>* methods,
const Symbol* name,
const Symbol* signature,
OverpassLookupMode overpass_mode,
StaticLookupMode static_mode,
PrivateLookupMode private_mode);
// Free CHeap allocated fields.
void release_C_heap_structures();
// RedefineClasses support
void link_previous_versions(InstanceKlass* pv) { _previous_versions = pv; }
void mark_newly_obsolete_methods(Array<Method*>* old_methods, int emcp_method_count);
public:
// CDS support - remove and restore oops from metadata. Oops are not shared.
virtual void remove_unshareable_info();
virtual void restore_unshareable_info(ClassLoaderData* loader_data, Handle protection_domain, TRAPS);
// jvm support
jint compute_modifier_flags(TRAPS) const;
// JSR-292 support
MemberNameTable* member_names() { return _member_names; }
void set_member_names(MemberNameTable* member_names) { _member_names = member_names; }
bool add_member_name(Handle member_name);
public:
// JVMTI support
jint jvmti_class_status() const;
public:
// Printing
#ifndef PRODUCT
void print_on(outputStream* st) const;
#endif
void print_value_on(outputStream* st) const;
void oop_print_value_on(oop obj, outputStream* st);
#ifndef PRODUCT
void oop_print_on (oop obj, outputStream* st);
void print_dependent_nmethods(bool verbose = false);
bool is_dependent_nmethod(nmethod* nm);
#endif
const char* internal_name() const;
// Verification
void verify_on(outputStream* st);
void oop_verify_on(oop obj, outputStream* st);
};
inline Method* 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();
}
// for adding methods
// UNSET_IDNUM return means no more ids available
inline u2 InstanceKlass::next_method_idnum() {
if (_idnum_allocated_count == ConstMethod::MAX_IDNUM) {
return ConstMethod::UNSET_IDNUM; // no more ids available
} else {
return _idnum_allocated_count++;
}
}
/* JNIid class for jfieldIDs only */
class JNIid: public CHeapObj<mtClass> {
friend class VMStructs;
private:
Klass* _holder;
JNIid* _next;
int _offset;
#ifdef ASSERT
bool _is_static_field_id;
#endif
public:
// Accessors
Klass* holder() const { return _holder; }
int offset() const { return _offset; }
JNIid* next() { return _next; }
// Constructor
JNIid(Klass* holder, int offset, JNIid* next);
// Identifier lookup
JNIid* find(int offset);
bool find_local_field(fieldDescriptor* fd) {
return InstanceKlass::cast(holder())->find_local_field_from_offset(offset(), true, fd);
}
static void deallocate(JNIid* id);
// Debugging
#ifdef ASSERT
bool is_static_field_id() const { return _is_static_field_id; }
void set_is_static_field_id() { _is_static_field_id = true; }
#endif
void verify(Klass* holder);
};
// An iterator that's used to access the inner classes indices in the
// InstanceKlass::_inner_classes array.
class InnerClassesIterator : public StackObj {
private:
Array<jushort>* _inner_classes;
int _length;
int _idx;
public:
InnerClassesIterator(instanceKlassHandle k) {
_inner_classes = k->inner_classes();
if (k->inner_classes() != NULL) {
_length = _inner_classes->length();
// The inner class array's length should be the multiple of
// inner_class_next_offset if it only contains the InnerClasses
// attribute data, or it should be
// n*inner_class_next_offset+enclosing_method_attribute_size
// if it also contains the EnclosingMethod data.
assert((_length % InstanceKlass::inner_class_next_offset == 0 ||
_length % InstanceKlass::inner_class_next_offset == InstanceKlass::enclosing_method_attribute_size),
"just checking");
// Remove the enclosing_method portion if exists.
if (_length % InstanceKlass::inner_class_next_offset == InstanceKlass::enclosing_method_attribute_size) {
_length -= InstanceKlass::enclosing_method_attribute_size;
}
} else {
_length = 0;
}
_idx = 0;
}
int length() const {
return _length;
}
void next() {
_idx += InstanceKlass::inner_class_next_offset;
}
bool done() const {
return (_idx >= _length);
}
u2 inner_class_info_index() const {
return _inner_classes->at(
_idx + InstanceKlass::inner_class_inner_class_info_offset);
}
void set_inner_class_info_index(u2 index) {
_inner_classes->at_put(
_idx + InstanceKlass::inner_class_inner_class_info_offset, index);
}
u2 outer_class_info_index() const {
return _inner_classes->at(
_idx + InstanceKlass::inner_class_outer_class_info_offset);
}
void set_outer_class_info_index(u2 index) {
_inner_classes->at_put(
_idx + InstanceKlass::inner_class_outer_class_info_offset, index);
}
u2 inner_name_index() const {
return _inner_classes->at(
_idx + InstanceKlass::inner_class_inner_name_offset);
}
void set_inner_name_index(u2 index) {
_inner_classes->at_put(
_idx + InstanceKlass::inner_class_inner_name_offset, index);
}
u2 inner_access_flags() const {
return _inner_classes->at(
_idx + InstanceKlass::inner_class_access_flags_offset);
}
};
#endif // SHARE_VM_OOPS_INSTANCEKLASS_HPP