1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/vm/runtime/fieldDescriptor.hpp Wed Apr 27 01:25:04 2016 +0800
1.3 @@ -0,0 +1,131 @@
1.4 +/*
1.5 + * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 + * or visit www.oracle.com if you need additional information or have any
1.24 + * questions.
1.25 + *
1.26 + */
1.27 +
1.28 +#ifndef SHARE_VM_RUNTIME_FIELDDESCRIPTOR_HPP
1.29 +#define SHARE_VM_RUNTIME_FIELDDESCRIPTOR_HPP
1.30 +
1.31 +#include "oops/constantPool.hpp"
1.32 +#include "oops/symbol.hpp"
1.33 +#include "runtime/fieldType.hpp"
1.34 +#include "utilities/accessFlags.hpp"
1.35 +#include "utilities/constantTag.hpp"
1.36 +
1.37 +// A fieldDescriptor describes the attributes of a single field (instance or class variable).
1.38 +// It needs the class constant pool to work (because it only holds indices into the pool
1.39 +// rather than the actual info).
1.40 +
1.41 +class fieldDescriptor VALUE_OBJ_CLASS_SPEC {
1.42 + private:
1.43 + AccessFlags _access_flags;
1.44 + int _index; // the field index
1.45 + constantPoolHandle _cp;
1.46 +
1.47 + // update the access_flags for the field in the klass
1.48 + void update_klass_field_access_flag() {
1.49 + InstanceKlass* ik = field_holder();
1.50 + ik->field(index())->set_access_flags(_access_flags.as_short());
1.51 + }
1.52 +
1.53 + FieldInfo* field() const {
1.54 + InstanceKlass* ik = field_holder();
1.55 + return ik->field(_index);
1.56 + }
1.57 +
1.58 + public:
1.59 + fieldDescriptor() {
1.60 + DEBUG_ONLY(_index = badInt);
1.61 + }
1.62 + fieldDescriptor(InstanceKlass* ik, int index) {
1.63 + DEBUG_ONLY(_index = badInt);
1.64 + reinitialize(ik, index);
1.65 + }
1.66 + Symbol* name() const {
1.67 + return field()->name(_cp);
1.68 + }
1.69 + Symbol* signature() const {
1.70 + return field()->signature(_cp);
1.71 + }
1.72 + InstanceKlass* field_holder() const { return _cp->pool_holder(); }
1.73 + ConstantPool* constants() const { return _cp(); }
1.74 + AccessFlags access_flags() const { return _access_flags; }
1.75 + oop loader() const;
1.76 + // Offset (in words) of field from start of instanceOop / Klass*
1.77 + int offset() const { return field()->offset(); }
1.78 + Symbol* generic_signature() const;
1.79 + int index() const { return _index; }
1.80 + AnnotationArray* annotations() const;
1.81 + AnnotationArray* type_annotations() const;
1.82 +
1.83 + // Initial field value
1.84 + bool has_initial_value() const { return field()->initval_index() != 0; }
1.85 + int initial_value_index() const { return field()->initval_index(); }
1.86 + constantTag initial_value_tag() const; // The tag will return true on one of is_int(), is_long(), is_single(), is_double()
1.87 + jint int_initial_value() const;
1.88 + jlong long_initial_value() const;
1.89 + jfloat float_initial_value() const;
1.90 + jdouble double_initial_value() const;
1.91 + oop string_initial_value(TRAPS) const;
1.92 +
1.93 + // Field signature type
1.94 + BasicType field_type() const { return FieldType::basic_type(signature()); }
1.95 +
1.96 + // Access flags
1.97 + bool is_public() const { return access_flags().is_public(); }
1.98 + bool is_private() const { return access_flags().is_private(); }
1.99 + bool is_protected() const { return access_flags().is_protected(); }
1.100 + bool is_package_private() const { return !is_public() && !is_private() && !is_protected(); }
1.101 +
1.102 + bool is_static() const { return access_flags().is_static(); }
1.103 + bool is_final() const { return access_flags().is_final(); }
1.104 + bool is_volatile() const { return access_flags().is_volatile(); }
1.105 + bool is_transient() const { return access_flags().is_transient(); }
1.106 +
1.107 + bool is_synthetic() const { return access_flags().is_synthetic(); }
1.108 +
1.109 + bool is_field_access_watched() const { return access_flags().is_field_access_watched(); }
1.110 + bool is_field_modification_watched() const
1.111 + { return access_flags().is_field_modification_watched(); }
1.112 + bool has_generic_signature() const { return access_flags().field_has_generic_signature(); }
1.113 +
1.114 + void set_is_field_access_watched(const bool value) {
1.115 + _access_flags.set_is_field_access_watched(value);
1.116 + update_klass_field_access_flag();
1.117 + }
1.118 +
1.119 + void set_is_field_modification_watched(const bool value) {
1.120 + _access_flags.set_is_field_modification_watched(value);
1.121 + update_klass_field_access_flag();
1.122 + }
1.123 +
1.124 + // Initialization
1.125 + void reinitialize(InstanceKlass* ik, int index);
1.126 +
1.127 + // Print
1.128 + void print() { print_on(tty); }
1.129 + void print_on(outputStream* st) const PRODUCT_RETURN;
1.130 + void print_on_for(outputStream* st, oop obj) PRODUCT_RETURN;
1.131 + void verify() const PRODUCT_RETURN;
1.132 +};
1.133 +
1.134 +#endif // SHARE_VM_RUNTIME_FIELDDESCRIPTOR_HPP
