#ifndef SHARE_VM_OOPS_INSTANCEKLASS_HPP

#define SHARE_VM_OOPS_INSTANCEKLASS_HPP

#include "memory/referenceType.hpp"

#include "oops/constMethodOop.hpp"

#include "oops/constantPoolOop.hpp"

#include "oops/fieldInfo.hpp"

#include "oops/instanceOop.hpp"

#include "oops/klassOop.hpp"

#include "oops/klassVtable.hpp"

#include "oops/objArrayOop.hpp"

#include "runtime/atomic.hpp"

#include "runtime/handles.hpp"

#include "runtime/os.hpp"

#include "utilities/accessFlags.hpp"

#include "utilities/bitMap.inline.hpp"

#include "trace/traceMacros.hpp"

class SuperTypeClosure;

class JNIid;

class jniIdMapBase;

class BreakpointInfo;

class fieldDescriptor;

class DepChange;

class nmethodBucket;

class PreviousVersionNode;

class JvmtiCachedClassFieldMap;

class FieldClosure: public StackObj {

public:

virtual void do_field(fieldDescriptor* fd) = 0;

};

#ifndef PRODUCT

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 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;

};

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; }

static int number_of_instance_classes() { return _total_instanceKlass_count; }

private:

static volatile int _total_instanceKlass_count;

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, 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]

// ...

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;

// Class signers.

objArrayOop _signers;

// 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.

typeArrayOop _inner_classes;

// 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.

//

// Name of source file containing this klass, NULL if not specified.

Symbol* _source_file_name;

// 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

char* _source_debug_extension;

// Generic signature, or null if none.

Symbol* _generic_signature;

// 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

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

bool _is_marked_dependent; // used for marking during flushing and deoptimization

enum {

_misc_rewritten = 1 << 0, // methods rewritten.

_misc_has_nonstatic_fields = 1 << 1, // for sizing with UseCompressedOops

_misc_should_verify_class = 1 << 2, // allow caching of preverification

_misc_is_anonymous = 1 << 3 // has embedded _inner_classes field

};

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)

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

// Array of interesting part(s) of the previous version(s) of this

// instanceKlass. See PreviousVersionWalker below.

GrowableArray<PreviousVersionNode *>* _previous_versions;

// 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

// 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

// 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 klassOop that's not itself: one implementor.

// Itsef: 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 instanceKlassKlass;

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

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); }

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; }

typeArrayOop fields() const { return _fields; }

void set_fields(typeArrayOop f, u2 java_fields_count) {

oop_store_without_check((oop*) &_fields, (oop) f);

_java_fields_count = java_fields_count;

}

// 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

};

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(methodHandle super_method, Handle targetclassloader, Symbol* targetclassname, TRAPS);

// package

bool is_same_class_package(klassOop class2);

bool is_same_class_package(oop classloader2, Symbol* classname2);

static bool is_same_class_package(oop class_loader1, Symbol* class_name1, oop class_loader2, Symbol* class_name2);

// find an enclosing class (defined where original code was, in jvm.cpp!)

klassOop compute_enclosing_class(bool* inner_is_member, TRAPS) {

instanceKlassHandle self(THREAD, this->as_klassOop());

return compute_enclosing_class_impl(self, inner_is_member, THREAD);

}

static klassOop compute_enclosing_class_impl(instanceKlassHandle self,

bool* inner_is_member, 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; }

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 relocate_and_link_methods(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 (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(sizeof(klassOopDesc) + 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

klassOop 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

klassOop 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

klassOop 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)

methodOop find_method(Symbol* name, Symbol* signature) const;

static methodOop find_method(objArrayOop methods, Symbol* name, Symbol* signature);

// lookup operation (returns NULL if not found)

methodOop uncached_lookup_method(Symbol* name, Symbol* signature) const;

// lookup a method in all the interfaces that this class implements

// (returns NULL if not found)

methodOop lookup_method_in_all_interfaces(Symbol* name, Symbol* 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 {

oop* hk = adr_host_klass();

if (hk == NULL) {

return NULL;

} else {

return *hk;

}

}

void set_host_klass(oop host) {

assert(is_anonymous(), "not anonymous");

oop* addr = adr_host_klass();

assert(addr != NULL, "no reversed space");

oop_store(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;

}

}

// signers

objArrayOop signers() const { return _signers; }

void set_signers(objArrayOop s) { oop_store((oop*) &_signers, oop(s)); }

// source file name

Symbol* source_file_name() const { return _source_file_name; }

void set_source_file_name(Symbol* 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

char* source_debug_extension() const { return _source_debug_extension; }

void set_source_debug_extension(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 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, BitMap *emcp_methods,

int emcp_method_count);

// If the _previous_versions array is non-NULL, then this klass

// has been redefined at least once even if we aren't currently

// tracking a previous version.

bool has_been_redefined() const { return _previous_versions != NULL; }

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

Symbol* generic_signature() const { return _generic_signature; }

void set_generic_signature(Symbol* sig) { _generic_signature = sig; }

u2 enclosing_method_data(int offset);

u2 enclosing_method_class_index() {

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,

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);

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_parameter_annotations); }

void set_method_default_annotations_of(int idnum, typeArrayOop anno)

{ set_methods_annotations_of(idnum, anno, &_methods_default_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, int level, bool match_level) 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 ByteSize init_state_offset() { return in_ByteSize(sizeof(klassOopDesc) + offset_of(instanceKlass, _init_state)); }

TRACE_DEFINE_OFFSET;

static ByteSize init_thread_offset() { return in_ByteSize(sizeof(klassOopDesc) + offset_of(instanceKlass, _init_thread)); }

// subclass/subinterface checks

bool implements_interface(klassOop k) const;

// Access to the implementor of an interface.

klassOop implementor() const

{

klassOop* k = (klassOop*)adr_implementor();

if (k == NULL) {

return NULL;

} else {

return *k;

}

}

void set_implementor(klassOop k) {

assert(is_interface(), "not interface");

oop* addr = adr_implementor();

oop_store_without_check(addr, k);

}

int nof_implementors() const {

klassOop k = implementor();

if (k == NULL) {

return 0;

} else if (k != this->as_klassOop()) {

return 1;

} else {

return 2;

}

}

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) {

assert(k->is_klass(), "must be");

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()) +

((is_interface() || is_anonymous()) ?

align_object_offset(nonstatic_oop_map_size()) :

nonstatic_oop_map_size()) +

(is_interface() ? (int)sizeof(klassOop)/HeapWordSize : 0) +

(is_anonymous() ? (int)sizeof(klassOop)/HeapWordSize : 0));

}

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(); }

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() + align_object_offset(itable_length()));

}

oop* adr_implementor() const {

if (is_interface()) {

return (oop*)(start_of_nonstatic_oop_maps() +

nonstatic_oop_map_count());

} else {

return NULL;

}

};

oop* adr_host_klass() const {

if (is_anonymous()) {

oop* adr_impl = adr_implementor();

if (adr_impl != NULL) {

return adr_impl + 1;

} else {

return (oop*)(start_of_nonstatic_oop_maps() +

nonstatic_oop_map_count());

}

} else {

return NULL;

}

}

// 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);

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

// Naming

const 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

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; }

u2 idnum_allocated_count() const { return _idnum_allocated_count; }

// 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); }

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_signers() const { return (oop*)&this->_signers;}

oop* adr_inner_classes() const { return (oop*)&this->_inner_classes;}

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();

virtual void shared_symbols_iterate(SymbolClosure* closure);

// jvm support

jint compute_modifier_flags(TRAPS) const;

public:

// JVMTI support

jint jvmti_class_status() const;

public:

// Printing

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

// Verification

const char* internal_name() const;

void oop_verify_on(oop obj, outputStream* st);

};

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));

}

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++;

}

}

class JNIid: public CHeapObj<mtClass> {

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);

bool find_local_field(fieldDescriptor* fd) {

return instanceKlass::cast(holder())->find_local_field_from_offset(offset(), true, fd);

}

// 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);

};

class BreakpointInfo;

class PreviousVersionNode : public CHeapObj<mtClass> {

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;

}

};

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;

}

};

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();

};

class nmethodBucket: public CHeapObj<mtClass> {

friend class VMStructs;

private:

nmethod* _nmethod;

int _count;

nmethodBucket* _next;

public:

nmethodBucket(nmethod* nmethod, nmethodBucket* next) {

_nmethod = nmethod;

_next = next;

_count = 1;

}

int count() { return _count; }

int increment() { _count += 1; return _count; }

int decrement() { _count -= 1; assert(_count >= 0, "don't underflow"); return _count; }

nmethodBucket* next() { return _next; }

void set_next(nmethodBucket* b) { _next = b; }

nmethod* get_nmethod() { return _nmethod; }

};

class InnerClassesIterator : public StackObj {

private:

typeArrayHandle _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->ushort_at(

_idx + instanceKlass::inner_class_inner_class_info_offset);

}

void set_inner_class_info_index(u2 index) {

_inner_classes->ushort_at_put(

_idx + instanceKlass::inner_class_inner_class_info_offset, index);

}

u2 outer_class_info_index() const {

return _inner_classes->ushort_at(

_idx + instanceKlass::inner_class_outer_class_info_offset);

}

void set_outer_class_info_index(u2 index) {

_inner_classes->ushort_at_put(

_idx + instanceKlass::inner_class_outer_class_info_offset, index);

}

u2 inner_name_index() const {

return _inner_classes->ushort_at(

_idx + instanceKlass::inner_class_inner_name_offset);

}

void set_inner_name_index(u2 index) {

_inner_classes->ushort_at_put(

_idx + instanceKlass::inner_class_inner_name_offset, index);

}

u2 inner_access_flags() const {

return _inner_classes->ushort_at(

_idx + instanceKlass::inner_class_access_flags_offset);

}

};

#endif // SHARE_VM_OOPS_INSTANCEKLASS_HPP