121 lines
4.9 KiB
C++
121 lines
4.9 KiB
C++
/*
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* Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#ifndef SHARE_RUNTIME_FIELDDESCRIPTOR_HPP
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#define SHARE_RUNTIME_FIELDDESCRIPTOR_HPP
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#include "oops/constantPool.hpp"
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#include "oops/fieldInfo.hpp"
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#include "oops/instanceKlass.hpp"
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#include "oops/symbol.hpp"
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#include "runtime/fieldType.hpp"
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#include "utilities/accessFlags.hpp"
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#include "utilities/constantTag.hpp"
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// A fieldDescriptor describes the attributes of a single field (instance or class variable).
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// It needs the class constant pool to work (because it only holds indices into the pool
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// rather than the actual info).
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class fieldDescriptor {
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private:
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AccessFlags _access_flags;
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int _index; // the field index
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constantPoolHandle _cp;
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// update the access_flags for the field in the klass
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inline void update_klass_field_access_flag();
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inline FieldInfo* field() const;
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public:
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fieldDescriptor() {
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DEBUG_ONLY(_index = badInt);
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}
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fieldDescriptor(InstanceKlass* ik, int index) {
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DEBUG_ONLY(_index = badInt);
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reinitialize(ik, index);
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}
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inline Symbol* name() const;
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inline Symbol* signature() const;
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inline InstanceKlass* field_holder() const;
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inline ConstantPool* constants() const;
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AccessFlags access_flags() const { return _access_flags; }
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oop loader() const;
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// Offset (in words) of field from start of instanceOop / Klass*
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inline int offset() const;
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Symbol* generic_signature() const;
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int index() const { return _index; }
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AnnotationArray* annotations() const;
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AnnotationArray* type_annotations() const;
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// Initial field value
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inline bool has_initial_value() const;
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inline int initial_value_index() const;
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constantTag initial_value_tag() const; // The tag will return true on one of is_int(), is_long(), is_single(), is_double()
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jint int_initial_value() const;
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jlong long_initial_value() const;
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jfloat float_initial_value() const;
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jdouble double_initial_value() const;
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oop string_initial_value(TRAPS) const;
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// Field signature type
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inline BasicType field_type() const;
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// Access flags
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bool is_public() const { return access_flags().is_public(); }
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bool is_private() const { return access_flags().is_private(); }
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bool is_protected() const { return access_flags().is_protected(); }
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bool is_package_private() const { return !is_public() && !is_private() && !is_protected(); }
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bool is_static() const { return access_flags().is_static(); }
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bool is_final() const { return access_flags().is_final(); }
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bool is_stable() const { return access_flags().is_stable(); }
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bool is_volatile() const { return access_flags().is_volatile(); }
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bool is_transient() const { return access_flags().is_transient(); }
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bool is_synthetic() const { return access_flags().is_synthetic(); }
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bool is_field_access_watched() const { return access_flags().is_field_access_watched(); }
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bool is_field_modification_watched() const
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{ return access_flags().is_field_modification_watched(); }
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bool has_initialized_final_update() const { return access_flags().has_field_initialized_final_update(); }
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bool has_generic_signature() const { return access_flags().field_has_generic_signature(); }
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inline void set_is_field_access_watched(const bool value);
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inline void set_is_field_modification_watched(const bool value);
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inline void set_has_initialized_final_update(const bool value);
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// Initialization
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void reinitialize(InstanceKlass* ik, int index);
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// Print
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void print() const;
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void print_on(outputStream* st) const PRODUCT_RETURN;
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void print_on_for(outputStream* st, oop obj) PRODUCT_RETURN;
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void verify() const PRODUCT_RETURN;
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};
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#endif // SHARE_RUNTIME_FIELDDESCRIPTOR_HPP
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