1317 lines
51 KiB
C++
1317 lines
51 KiB
C++
/*
|
|
* Copyright (c) 1997, 2013, 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 "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/atomic.hpp"
|
|
#include "runtime/handles.hpp"
|
|
#include "runtime/os.hpp"
|
|
#include "utilities/accessFlags.hpp"
|
|
#include "utilities/bitMap.inline.hpp"
|
|
#include "utilities/macros.hpp"
|
|
#include "trace/traceMacros.hpp"
|
|
|
|
// An InstanceKlass is the VM level representation of a Java class.
|
|
// It contains all information needed for at class at execution runtime.
|
|
|
|
// InstanceKlass layout:
|
|
// [C++ vtbl pointer ] Klass
|
|
// [subtype cache ] Klass
|
|
// [instance size ] Klass
|
|
// [java mirror ] Klass
|
|
// [super ] Klass
|
|
// [access_flags ] Klass
|
|
// [name ] Klass
|
|
// [first subklass ] Klass
|
|
// [next sibling ] Klass
|
|
// [array klasses ]
|
|
// [methods ]
|
|
// [local interfaces ]
|
|
// [transitive interfaces ]
|
|
// [fields ]
|
|
// [constants ]
|
|
// [class loader ]
|
|
// [source file name ]
|
|
// [inner classes ]
|
|
// [static field size ]
|
|
// [nonstatic field size ]
|
|
// [static oop fields size ]
|
|
// [nonstatic oop maps size ]
|
|
// [has finalize method ]
|
|
// [deoptimization mark bit ]
|
|
// [initialization state ]
|
|
// [initializing thread ]
|
|
// [Java vtable length ]
|
|
// [oop map cache (stack maps) ]
|
|
// [EMBEDDED Java vtable ] size in words = vtable_len
|
|
// [EMBEDDED 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 SuperTypeClosure;
|
|
class JNIid;
|
|
class jniIdMapBase;
|
|
class BreakpointInfo;
|
|
class fieldDescriptor;
|
|
class DepChange;
|
|
class nmethodBucket;
|
|
class PreviousVersionNode;
|
|
class JvmtiCachedClassFieldMap;
|
|
class MemberNameTable;
|
|
|
|
// 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 ClassFileParser;
|
|
friend class CompileReplay;
|
|
|
|
protected:
|
|
// Constructor
|
|
InstanceKlass(int vtable_len,
|
|
int itable_len,
|
|
int static_field_size,
|
|
int nonstatic_oop_map_size,
|
|
ReferenceType rt,
|
|
AccessFlags access_flags,
|
|
bool is_anonymous);
|
|
public:
|
|
static InstanceKlass* allocate_instance_klass(
|
|
ClassLoaderData* loader_data,
|
|
int vtable_len,
|
|
int itable_len,
|
|
int static_field_size,
|
|
int nonstatic_oop_map_size,
|
|
ReferenceType rt,
|
|
AccessFlags access_flags,
|
|
Symbol* name,
|
|
Klass* super_klass,
|
|
bool is_anonymous,
|
|
TRAPS);
|
|
|
|
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;
|
|
|
|
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
|
|
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
|
|
|
|
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 _host_klass field
|
|
_misc_is_contended = 1 << 4, // marked with contended annotation
|
|
_misc_has_default_methods = 1 << 5 // class/superclass/implemented interfaces has default methods
|
|
};
|
|
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
|
|
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 Method*
|
|
// 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
|
|
// 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.
|
|
// 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 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 ordering
|
|
Array<int>* method_ordering() const { return _method_ordering; }
|
|
void set_method_ordering(Array<int>* m) { _method_ordering = m; }
|
|
void copy_method_ordering(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(methodHandle super_method, Handle targetclassloader, Symbol* targetclassname, TRAPS);
|
|
|
|
// package
|
|
bool is_same_class_package(Klass* 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!)
|
|
Klass* compute_enclosing_class(bool* inner_is_member, TRAPS) {
|
|
instanceKlassHandle self(THREAD, this);
|
|
return compute_enclosing_class_impl(self, inner_is_member, THREAD);
|
|
}
|
|
static Klass* 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(Klass* class2, TRAPS) {
|
|
instanceKlassHandle self(THREAD, this);
|
|
return is_same_package_member_impl(self, class2, THREAD);
|
|
}
|
|
static bool is_same_package_member_impl(instanceKlassHandle self,
|
|
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(Symbol* name, Symbol* signature) const;
|
|
static Method* find_method(Array<Method*>* methods, Symbol* name, Symbol* signature);
|
|
static Method* find_instance_method(Array<Method*>* methods, Symbol* name, Symbol* signature);
|
|
|
|
// find a local method index in default_methods (returns -1 if not found)
|
|
static int find_method_index(Array<Method*>* methods, Symbol* name, Symbol* signature);
|
|
|
|
// lookup operation (returns NULL if not found)
|
|
Method* uncached_lookup_method(Symbol* name, Symbol* signature) 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) 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(Symbol* name, int* end);
|
|
static int find_method_by_name(Array<Method*>* methods, 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 {
|
|
return *hk;
|
|
}
|
|
}
|
|
void set_host_klass(Klass* host) {
|
|
assert(is_anonymous(), "not anonymous");
|
|
Klass** addr = (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
|
|
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 == 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;
|
|
}
|
|
|
|
static void purge_previous_versions(InstanceKlass* ik);
|
|
|
|
// 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;
|
|
}
|
|
}
|
|
|
|
// 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);
|
|
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(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(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 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;
|
|
|
|
// 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(); }
|
|
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(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);
|
|
|
|
// Casting from Klass*
|
|
static InstanceKlass* cast(Klass* k) {
|
|
assert(k->is_klass(), "must be");
|
|
assert(k->oop_is_instance(), "cast to InstanceKlass");
|
|
return (InstanceKlass*) k;
|
|
}
|
|
|
|
InstanceKlass* java_super() const {
|
|
return (super() == NULL) ? NULL : cast(super());
|
|
}
|
|
|
|
// Sizing (in words)
|
|
static int header_size() { return align_object_offset(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() +
|
|
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(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 int vtable_start_offset() { return header_size(); }
|
|
static int vtable_length_offset() { return offset_of(InstanceKlass, _vtable_len) / HeapWordSize; }
|
|
|
|
intptr_t* start_of_vtable() const { return ((intptr_t*)this) + 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*)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() + align_object_offset(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(Method** old_methods, Method** new_methods,
|
|
int methods_length, bool* trace_name_printed);
|
|
#endif // INCLUDE_JVMTI
|
|
|
|
// Garbage collection
|
|
void oop_follow_contents(oop obj);
|
|
int oop_adjust_pointers(oop obj);
|
|
|
|
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,
|
|
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);
|
|
|
|
// Parallel Scavenge and Parallel Old
|
|
PARALLEL_GC_DECLS
|
|
|
|
// Naming
|
|
const char* signature_name() const;
|
|
|
|
// Iterators
|
|
int oop_oop_iterate(oop obj, ExtendedOopClosure* blk) {
|
|
return oop_oop_iterate_v(obj, blk);
|
|
}
|
|
|
|
int oop_oop_iterate_m(oop obj, ExtendedOopClosure* 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)
|
|
|
|
#if INCLUDE_ALL_GCS
|
|
#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 // INCLUDE_ALL_GCS
|
|
|
|
u2 idnum_allocated_count() const { return _idnum_allocated_count; }
|
|
|
|
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_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 Klass* 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
|
|
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);
|
|
|
|
// Free CHeap allocated fields.
|
|
void release_C_heap_structures();
|
|
public:
|
|
// CDS support - remove and restore oops from metadata. Oops are not shared.
|
|
virtual void remove_unshareable_info();
|
|
virtual void restore_unshareable_info(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; }
|
|
void add_member_name(int index, Handle member_name);
|
|
oop get_member_name(int index);
|
|
|
|
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, bool check_dictionary);
|
|
|
|
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);
|
|
};
|
|
|
|
|
|
// If breakpoints are more numerous than just JVMTI breakpoints,
|
|
// consider compressing this data structure.
|
|
// It is currently a simple linked list defined in method.hpp.
|
|
|
|
class BreakpointInfo;
|
|
|
|
|
|
// A collection point for interesting information about the previous
|
|
// version(s) of an InstanceKlass. A GrowableArray of PreviousVersionNodes
|
|
// is attached to the InstanceKlass as needed. See PreviousVersionWalker below.
|
|
class PreviousVersionNode : public CHeapObj<mtClass> {
|
|
private:
|
|
ConstantPool* _prev_constant_pool;
|
|
|
|
// 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<Method*>* _prev_EMCP_methods;
|
|
|
|
public:
|
|
PreviousVersionNode(ConstantPool* prev_constant_pool,
|
|
GrowableArray<Method*>* prev_EMCP_methods);
|
|
~PreviousVersionNode();
|
|
ConstantPool* prev_constant_pool() const {
|
|
return _prev_constant_pool;
|
|
}
|
|
GrowableArray<Method*>* prev_EMCP_methods() const {
|
|
return _prev_EMCP_methods;
|
|
}
|
|
};
|
|
|
|
|
|
// Helper object for walking previous versions.
|
|
class PreviousVersionWalker : public StackObj {
|
|
private:
|
|
Thread* _thread;
|
|
GrowableArray<PreviousVersionNode *>* _previous_versions;
|
|
int _current_index;
|
|
|
|
// A pointer to the current node object so we can handle the deletes.
|
|
PreviousVersionNode* _current_p;
|
|
|
|
// The constant pool handle keeps all the methods in this class from being
|
|
// deallocated from the metaspace during class unloading.
|
|
constantPoolHandle _current_constant_pool_handle;
|
|
|
|
public:
|
|
PreviousVersionWalker(Thread* thread, InstanceKlass *ik);
|
|
|
|
// Return the interesting information for the next previous version
|
|
// of the klass. Returns NULL if there are no more previous versions.
|
|
PreviousVersionNode* next_previous_version();
|
|
};
|
|
|
|
|
|
//
|
|
// nmethodBucket is used to record dependent nmethods for
|
|
// deoptimization. nmethod dependencies are actually <klass, method>
|
|
// pairs but we really only care about the klass part for purposes of
|
|
// finding nmethods which might need to be deoptimized. Instead of
|
|
// recording the method, a count of how many times a particular nmethod
|
|
// was recorded is kept. This ensures that any recording errors are
|
|
// noticed since an nmethod should be removed as many times are it's
|
|
// added.
|
|
//
|
|
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; }
|
|
};
|
|
|
|
// 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
|