aoqi@0: /* aoqi@0: * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. aoqi@0: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. aoqi@0: * aoqi@0: * This code is free software; you can redistribute it and/or modify it aoqi@0: * under the terms of the GNU General Public License version 2 only, as aoqi@0: * published by the Free Software Foundation. aoqi@0: * aoqi@0: * This code is distributed in the hope that it will be useful, but WITHOUT aoqi@0: * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or aoqi@0: * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License aoqi@0: * version 2 for more details (a copy is included in the LICENSE file that aoqi@0: * accompanied this code). aoqi@0: * aoqi@0: * You should have received a copy of the GNU General Public License version aoqi@0: * 2 along with this work; if not, write to the Free Software Foundation, aoqi@0: * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. aoqi@0: * aoqi@0: * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA aoqi@0: * or visit www.oracle.com if you need additional information or have any aoqi@0: * questions. aoqi@0: * aoqi@0: */ aoqi@0: aoqi@0: #ifndef SHARE_VM_RUNTIME_FIELDDESCRIPTOR_HPP aoqi@0: #define SHARE_VM_RUNTIME_FIELDDESCRIPTOR_HPP aoqi@0: aoqi@0: #include "oops/constantPool.hpp" aoqi@0: #include "oops/symbol.hpp" aoqi@0: #include "runtime/fieldType.hpp" aoqi@0: #include "utilities/accessFlags.hpp" aoqi@0: #include "utilities/constantTag.hpp" aoqi@0: aoqi@0: // A fieldDescriptor describes the attributes of a single field (instance or class variable). aoqi@0: // It needs the class constant pool to work (because it only holds indices into the pool aoqi@0: // rather than the actual info). aoqi@0: aoqi@0: class fieldDescriptor VALUE_OBJ_CLASS_SPEC { aoqi@0: private: aoqi@0: AccessFlags _access_flags; aoqi@0: int _index; // the field index aoqi@0: constantPoolHandle _cp; aoqi@0: aoqi@0: // update the access_flags for the field in the klass aoqi@0: void update_klass_field_access_flag() { aoqi@0: InstanceKlass* ik = field_holder(); aoqi@0: ik->field(index())->set_access_flags(_access_flags.as_short()); aoqi@0: } aoqi@0: aoqi@0: FieldInfo* field() const { aoqi@0: InstanceKlass* ik = field_holder(); aoqi@0: return ik->field(_index); aoqi@0: } aoqi@0: aoqi@0: public: aoqi@0: fieldDescriptor() { aoqi@0: DEBUG_ONLY(_index = badInt); aoqi@0: } aoqi@0: fieldDescriptor(InstanceKlass* ik, int index) { aoqi@0: DEBUG_ONLY(_index = badInt); aoqi@0: reinitialize(ik, index); aoqi@0: } aoqi@0: Symbol* name() const { aoqi@0: return field()->name(_cp); aoqi@0: } aoqi@0: Symbol* signature() const { aoqi@0: return field()->signature(_cp); aoqi@0: } aoqi@0: InstanceKlass* field_holder() const { return _cp->pool_holder(); } aoqi@0: ConstantPool* constants() const { return _cp(); } aoqi@0: AccessFlags access_flags() const { return _access_flags; } aoqi@0: oop loader() const; aoqi@0: // Offset (in words) of field from start of instanceOop / Klass* aoqi@0: int offset() const { return field()->offset(); } aoqi@0: Symbol* generic_signature() const; aoqi@0: int index() const { return _index; } aoqi@0: AnnotationArray* annotations() const; aoqi@0: AnnotationArray* type_annotations() const; aoqi@0: aoqi@0: // Initial field value aoqi@0: bool has_initial_value() const { return field()->initval_index() != 0; } aoqi@0: int initial_value_index() const { return field()->initval_index(); } aoqi@0: constantTag initial_value_tag() const; // The tag will return true on one of is_int(), is_long(), is_single(), is_double() aoqi@0: jint int_initial_value() const; aoqi@0: jlong long_initial_value() const; aoqi@0: jfloat float_initial_value() const; aoqi@0: jdouble double_initial_value() const; aoqi@0: oop string_initial_value(TRAPS) const; aoqi@0: aoqi@0: // Field signature type aoqi@0: BasicType field_type() const { return FieldType::basic_type(signature()); } aoqi@0: aoqi@0: // Access flags aoqi@0: bool is_public() const { return access_flags().is_public(); } aoqi@0: bool is_private() const { return access_flags().is_private(); } aoqi@0: bool is_protected() const { return access_flags().is_protected(); } aoqi@0: bool is_package_private() const { return !is_public() && !is_private() && !is_protected(); } aoqi@0: aoqi@0: bool is_static() const { return access_flags().is_static(); } aoqi@0: bool is_final() const { return access_flags().is_final(); } aoqi@0: bool is_volatile() const { return access_flags().is_volatile(); } aoqi@0: bool is_transient() const { return access_flags().is_transient(); } aoqi@0: aoqi@0: bool is_synthetic() const { return access_flags().is_synthetic(); } aoqi@0: aoqi@0: bool is_field_access_watched() const { return access_flags().is_field_access_watched(); } aoqi@0: bool is_field_modification_watched() const aoqi@0: { return access_flags().is_field_modification_watched(); } aoqi@0: bool has_generic_signature() const { return access_flags().field_has_generic_signature(); } aoqi@0: aoqi@0: void set_is_field_access_watched(const bool value) { aoqi@0: _access_flags.set_is_field_access_watched(value); aoqi@0: update_klass_field_access_flag(); aoqi@0: } aoqi@0: aoqi@0: void set_is_field_modification_watched(const bool value) { aoqi@0: _access_flags.set_is_field_modification_watched(value); aoqi@0: update_klass_field_access_flag(); aoqi@0: } aoqi@0: aoqi@0: // Initialization aoqi@0: void reinitialize(InstanceKlass* ik, int index); aoqi@0: aoqi@0: // Print aoqi@0: void print() { print_on(tty); } aoqi@0: void print_on(outputStream* st) const PRODUCT_RETURN; aoqi@0: void print_on_for(outputStream* st, oop obj) PRODUCT_RETURN; aoqi@0: void verify() const PRODUCT_RETURN; aoqi@0: }; aoqi@0: aoqi@0: #endif // SHARE_VM_RUNTIME_FIELDDESCRIPTOR_HPP