diff -r 000000000000 -r f90c822e73f8 src/share/vm/runtime/reflectionUtils.hpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/share/vm/runtime/reflectionUtils.hpp Wed Apr 27 01:25:04 2016 +0800 @@ -0,0 +1,240 @@ +/* + * Copyright (c) 1999, 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_RUNTIME_REFLECTIONUTILS_HPP +#define SHARE_VM_RUNTIME_REFLECTIONUTILS_HPP + +#include "memory/allocation.hpp" +#include "oops/instanceKlass.hpp" +#include "oops/objArrayOop.hpp" +#include "oops/oopsHierarchy.hpp" +#include "runtime/handles.inline.hpp" +#include "runtime/reflection.hpp" +#include "utilities/accessFlags.hpp" +#include "utilities/globalDefinitions.hpp" + +// A KlassStream is an abstract stream for streaming over self, superclasses +// and (super)interfaces. Streaming is done in reverse order (subclasses first, +// interfaces last). +// +// for (KlassStream st(k, false, false, false); !st.eos(); st.next()) { +// Klass* k = st.klass(); +// ... +// } + +class KlassStream VALUE_OBJ_CLASS_SPEC { + protected: + instanceKlassHandle _klass; // current klass/interface iterated over + instanceKlassHandle _base_klass; // initial klass/interface to iterate over + Array* _interfaces; // transitive interfaces for initial class + int _interface_index; // current interface being processed + bool _local_only; // process initial class/interface only + bool _classes_only; // process classes only (no interfaces) + bool _walk_defaults; // process default methods + bool _base_class_search_defaults; // time to process default methods + bool _defaults_checked; // already checked for default methods + int _index; + + virtual int length() = 0; + + public: + // constructor + KlassStream(instanceKlassHandle klass, bool local_only, bool classes_only, bool walk_defaults); + + // testing + bool eos(); + + // iterating + virtual void next() = 0; + + // accessors + instanceKlassHandle klass() const { return _klass; } + int index() const { return _index; } + bool base_class_search_defaults() const { return _base_class_search_defaults; } + void base_class_search_defaults(bool b) { _base_class_search_defaults = b; } +}; + + +// A MethodStream streams over all methods in a class, superclasses and (super)interfaces. +// Streaming is done in reverse order (subclasses first, methods in reverse order) +// Usage: +// +// for (MethodStream st(k, false, false); !st.eos(); st.next()) { +// Method* m = st.method(); +// ... +// } + +class MethodStream : public KlassStream { + private: + int length() { return methods()->length(); } + Array* methods() { + if (base_class_search_defaults()) { + base_class_search_defaults(false); + return _klass->default_methods(); + } else { + return _klass->methods(); + } + } + public: + MethodStream(instanceKlassHandle klass, bool local_only, bool classes_only) + : KlassStream(klass, local_only, classes_only, true) { + _index = length(); + next(); + } + + void next() { _index--; } + Method* method() { return methods()->at(index()); } +}; + + +// A FieldStream streams over all fields in a class, superclasses and (super)interfaces. +// Streaming is done in reverse order (subclasses first, fields in reverse order) +// Usage: +// +// for (FieldStream st(k, false, false); !st.eos(); st.next()) { +// Symbol* field_name = st.name(); +// ... +// } + + +class FieldStream : public KlassStream { + private: + int length() { return _klass->java_fields_count(); } + + fieldDescriptor _fd_buf; + + public: + FieldStream(instanceKlassHandle klass, bool local_only, bool classes_only) + : KlassStream(klass, local_only, classes_only, false) { + _index = length(); + next(); + } + + void next() { _index -= 1; } + + // Accessors for current field + AccessFlags access_flags() const { + AccessFlags flags; + flags.set_flags(_klass->field_access_flags(_index)); + return flags; + } + Symbol* name() const { + return _klass->field_name(_index); + } + Symbol* signature() const { + return _klass->field_signature(_index); + } + // missing: initval() + int offset() const { + return _klass->field_offset( index() ); + } + // bridge to a heavier API: + fieldDescriptor& field_descriptor() const { + fieldDescriptor& field = const_cast(_fd_buf); + field.reinitialize(_klass(), _index); + return field; + } +}; + +class FilteredField : public CHeapObj { + private: + Klass* _klass; + int _field_offset; + + public: + FilteredField(Klass* klass, int field_offset) { + _klass = klass; + _field_offset = field_offset; + } + Klass* klass() { return _klass; } + int field_offset() { return _field_offset; } +}; + +class FilteredFieldsMap : AllStatic { + private: + static GrowableArray *_filtered_fields; + public: + static void initialize(); + static bool is_filtered_field(Klass* klass, int field_offset) { + for (int i=0; i < _filtered_fields->length(); i++) { + if (klass == _filtered_fields->at(i)->klass() && + field_offset == _filtered_fields->at(i)->field_offset()) { + return true; + } + } + return false; + } + static int filtered_fields_count(Klass* klass, bool local_only) { + int nflds = 0; + for (int i=0; i < _filtered_fields->length(); i++) { + if (local_only && klass == _filtered_fields->at(i)->klass()) { + nflds++; + } else if (klass->is_subtype_of(_filtered_fields->at(i)->klass())) { + nflds++; + } + } + return nflds; + } + // Enhance Class Redefinition Support + static void classes_do(KlassClosure* f) { + for (int i = 0; i < _filtered_fields->length(); i++) { + f->do_klass(_filtered_fields->at(i)->klass()); + } + } +}; + + +// A FilteredFieldStream streams over all fields in a class, superclasses and +// (super)interfaces. Streaming is done in reverse order (subclasses first, +// fields in reverse order) +// +// Usage: +// +// for (FilteredFieldStream st(k, false, false); !st.eos(); st.next()) { +// Symbol* field_name = st.name(); +// ... +// } + +class FilteredFieldStream : public FieldStream { + private: + int _filtered_fields_count; + bool has_filtered_field() { return (_filtered_fields_count > 0); } + + public: + FilteredFieldStream(instanceKlassHandle klass, bool local_only, bool classes_only) + : FieldStream(klass, local_only, classes_only) { + _filtered_fields_count = FilteredFieldsMap::filtered_fields_count((Klass*)klass(), local_only); + } + int field_count(); + void next() { + _index -= 1; + if (has_filtered_field()) { + while (_index >=0 && FilteredFieldsMap::is_filtered_field((Klass*)_klass(), offset())) { + _index -= 1; + } + } + } +}; + +#endif // SHARE_VM_RUNTIME_REFLECTIONUTILS_HPP