| /* |
| * Copyright (c) 1997, 2017, 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_RUNTIME_FIELDDESCRIPTOR_HPP |
| #define SHARE_VM_RUNTIME_FIELDDESCRIPTOR_HPP |
| |
| #include "oops/constantPool.hpp" |
| #include "oops/symbol.hpp" |
| #include "runtime/fieldType.hpp" |
| #include "utilities/accessFlags.hpp" |
| #include "utilities/constantTag.hpp" |
| |
| // A fieldDescriptor describes the attributes of a single field (instance or class variable). |
| // It needs the class constant pool to work (because it only holds indices into the pool |
| // rather than the actual info). |
| |
| class fieldDescriptor VALUE_OBJ_CLASS_SPEC { |
| private: |
| AccessFlags _access_flags; |
| int _index; // the field index |
| constantPoolHandle _cp; |
| |
| // update the access_flags for the field in the klass |
| void update_klass_field_access_flag() { |
| InstanceKlass* ik = field_holder(); |
| ik->field(index())->set_access_flags(_access_flags.as_short()); |
| } |
| |
| FieldInfo* field() const { |
| InstanceKlass* ik = field_holder(); |
| return ik->field(_index); |
| } |
| |
| public: |
| fieldDescriptor() { |
| DEBUG_ONLY(_index = badInt); |
| } |
| fieldDescriptor(InstanceKlass* ik, int index) { |
| DEBUG_ONLY(_index = badInt); |
| reinitialize(ik, index); |
| } |
| Symbol* name() const { |
| return field()->name(_cp()); |
| } |
| Symbol* signature() const { |
| return field()->signature(_cp()); |
| } |
| InstanceKlass* field_holder() const { return _cp->pool_holder(); } |
| ConstantPool* constants() const { return _cp(); } |
| AccessFlags access_flags() const { return _access_flags; } |
| oop loader() const; |
| // Offset (in words) of field from start of instanceOop / Klass* |
| int offset() const { return field()->offset(); } |
| Symbol* generic_signature() const; |
| int index() const { return _index; } |
| AnnotationArray* annotations() const; |
| AnnotationArray* type_annotations() const; |
| |
| // Initial field value |
| bool has_initial_value() const { return field()->initval_index() != 0; } |
| int initial_value_index() const { return field()->initval_index(); } |
| constantTag initial_value_tag() const; // The tag will return true on one of is_int(), is_long(), is_single(), is_double() |
| jint int_initial_value() const; |
| jlong long_initial_value() const; |
| jfloat float_initial_value() const; |
| jdouble double_initial_value() const; |
| oop string_initial_value(TRAPS) const; |
| |
| // Field signature type |
| BasicType field_type() const { return FieldType::basic_type(signature()); } |
| |
| // Access flags |
| bool is_public() const { return access_flags().is_public(); } |
| bool is_private() const { return access_flags().is_private(); } |
| bool is_protected() const { return access_flags().is_protected(); } |
| bool is_package_private() const { return !is_public() && !is_private() && !is_protected(); } |
| |
| bool is_static() const { return access_flags().is_static(); } |
| bool is_final() const { return access_flags().is_final(); } |
| bool is_volatile() const { return access_flags().is_volatile(); } |
| bool is_transient() const { return access_flags().is_transient(); } |
| |
| bool is_synthetic() const { return access_flags().is_synthetic(); } |
| |
| bool is_field_access_watched() const { return access_flags().is_field_access_watched(); } |
| bool is_field_modification_watched() const |
| { return access_flags().is_field_modification_watched(); } |
| bool has_initialized_final_update() const { return access_flags().has_field_initialized_final_update(); } |
| bool has_generic_signature() const { return access_flags().field_has_generic_signature(); } |
| |
| void set_is_field_access_watched(const bool value) { |
| _access_flags.set_is_field_access_watched(value); |
| update_klass_field_access_flag(); |
| } |
| |
| void set_is_field_modification_watched(const bool value) { |
| _access_flags.set_is_field_modification_watched(value); |
| update_klass_field_access_flag(); |
| } |
| |
| void set_has_initialized_final_update(const bool value) { |
| _access_flags.set_has_field_initialized_final_update(value); |
| update_klass_field_access_flag(); |
| } |
| |
| // Initialization |
| void reinitialize(InstanceKlass* ik, int index); |
| |
| // Print |
| void print() { print_on(tty); } |
| void print_on(outputStream* st) const PRODUCT_RETURN; |
| void print_on_for(outputStream* st, oop obj) PRODUCT_RETURN; |
| void verify() const PRODUCT_RETURN; |
| }; |
| |
| #endif // SHARE_VM_RUNTIME_FIELDDESCRIPTOR_HPP |