duke@435: /* minqi@5103: * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved. duke@435: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. duke@435: * duke@435: * This code is free software; you can redistribute it and/or modify it duke@435: * under the terms of the GNU General Public License version 2 only, as duke@435: * published by the Free Software Foundation. duke@435: * duke@435: * This code is distributed in the hope that it will be useful, but WITHOUT duke@435: * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or duke@435: * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License duke@435: * version 2 for more details (a copy is included in the LICENSE file that duke@435: * accompanied this code). duke@435: * duke@435: * You should have received a copy of the GNU General Public License version duke@435: * 2 along with this work; if not, write to the Free Software Foundation, duke@435: * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. duke@435: * trims@1907: * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA trims@1907: * or visit www.oracle.com if you need additional information or have any trims@1907: * questions. duke@435: * duke@435: */ duke@435: stefank@2314: #ifndef SHARE_VM_RUNTIME_REFLECTIONUTILS_HPP stefank@2314: #define SHARE_VM_RUNTIME_REFLECTIONUTILS_HPP stefank@2314: stefank@2314: #include "memory/allocation.hpp" stefank@2314: #include "oops/instanceKlass.hpp" stefank@2314: #include "oops/objArrayOop.hpp" stefank@2314: #include "oops/oopsHierarchy.hpp" stefank@2314: #include "runtime/handles.inline.hpp" stefank@2314: #include "runtime/reflection.hpp" stefank@2314: #include "utilities/accessFlags.hpp" stefank@2314: #include "utilities/globalDefinitions.hpp" stefank@2314: duke@435: // A KlassStream is an abstract stream for streaming over self, superclasses duke@435: // and (super)interfaces. Streaming is done in reverse order (subclasses first, duke@435: // interfaces last). duke@435: // acorn@5848: // for (KlassStream st(k, false, false, false); !st.eos(); st.next()) { coleenp@4037: // Klass* k = st.klass(); duke@435: // ... duke@435: // } duke@435: duke@435: class KlassStream VALUE_OBJ_CLASS_SPEC { duke@435: protected: duke@435: instanceKlassHandle _klass; // current klass/interface iterated over acorn@5848: instanceKlassHandle _base_klass; // initial klass/interface to iterate over acorn@5848: Array* _interfaces; // transitive interfaces for initial class duke@435: int _interface_index; // current interface being processed duke@435: bool _local_only; // process initial class/interface only duke@435: bool _classes_only; // process classes only (no interfaces) acorn@5848: bool _walk_defaults; // process default methods acorn@5848: bool _base_class_search_defaults; // time to process default methods acorn@5848: bool _defaults_checked; // already checked for default methods duke@435: int _index; duke@435: acorn@5848: virtual int length() = 0; duke@435: duke@435: public: duke@435: // constructor acorn@5848: KlassStream(instanceKlassHandle klass, bool local_only, bool classes_only, bool walk_defaults); duke@435: duke@435: // testing duke@435: bool eos(); duke@435: duke@435: // iterating duke@435: virtual void next() = 0; duke@435: duke@435: // accessors duke@435: instanceKlassHandle klass() const { return _klass; } duke@435: int index() const { return _index; } acorn@5848: bool base_class_search_defaults() const { return _base_class_search_defaults; } acorn@5848: void base_class_search_defaults(bool b) { _base_class_search_defaults = b; } duke@435: }; duke@435: duke@435: duke@435: // A MethodStream streams over all methods in a class, superclasses and (super)interfaces. duke@435: // Streaming is done in reverse order (subclasses first, methods in reverse order) duke@435: // Usage: duke@435: // duke@435: // for (MethodStream st(k, false, false); !st.eos(); st.next()) { coleenp@4037: // Method* m = st.method(); duke@435: // ... duke@435: // } duke@435: duke@435: class MethodStream : public KlassStream { duke@435: private: acorn@5848: int length() { return methods()->length(); } acorn@5848: Array* methods() { acorn@5848: if (base_class_search_defaults()) { acorn@5848: base_class_search_defaults(false); acorn@5848: return _klass->default_methods(); acorn@5848: } else { acorn@5848: return _klass->methods(); acorn@5848: } acorn@5848: } duke@435: public: duke@435: MethodStream(instanceKlassHandle klass, bool local_only, bool classes_only) acorn@5848: : KlassStream(klass, local_only, classes_only, true) { duke@435: _index = length(); duke@435: next(); duke@435: } duke@435: duke@435: void next() { _index--; } acorn@5848: Method* method() { return methods()->at(index()); } duke@435: }; duke@435: duke@435: duke@435: // A FieldStream streams over all fields in a class, superclasses and (super)interfaces. duke@435: // Streaming is done in reverse order (subclasses first, fields in reverse order) duke@435: // Usage: duke@435: // duke@435: // for (FieldStream st(k, false, false); !st.eos(); st.next()) { coleenp@2497: // Symbol* field_name = st.name(); duke@435: // ... duke@435: // } duke@435: duke@435: duke@435: class FieldStream : public KlassStream { duke@435: private: acorn@5848: int length() { return _klass->java_fields_count(); } never@3137: drchase@5732: fieldDescriptor _fd_buf; drchase@5732: duke@435: public: duke@435: FieldStream(instanceKlassHandle klass, bool local_only, bool classes_only) acorn@5848: : KlassStream(klass, local_only, classes_only, false) { duke@435: _index = length(); duke@435: next(); duke@435: } duke@435: never@3137: void next() { _index -= 1; } duke@435: duke@435: // Accessors for current field duke@435: AccessFlags access_flags() const { duke@435: AccessFlags flags; never@3137: flags.set_flags(_klass->field_access_flags(_index)); duke@435: return flags; duke@435: } coleenp@2497: Symbol* name() const { never@3137: return _klass->field_name(_index); duke@435: } coleenp@2497: Symbol* signature() const { never@3137: return _klass->field_signature(_index); duke@435: } duke@435: // missing: initval() duke@435: int offset() const { never@3137: return _klass->field_offset( index() ); duke@435: } drchase@5732: // bridge to a heavier API: drchase@5732: fieldDescriptor& field_descriptor() const { drchase@5732: fieldDescriptor& field = const_cast(_fd_buf); drchase@5732: field.reinitialize(_klass(), _index); drchase@5732: return field; drchase@5732: } duke@435: }; duke@435: minqi@5103: class FilteredField : public CHeapObj { duke@435: private: coleenp@4037: Klass* _klass; minqi@5103: int _field_offset; duke@435: duke@435: public: coleenp@4037: FilteredField(Klass* klass, int field_offset) { duke@435: _klass = klass; duke@435: _field_offset = field_offset; duke@435: } coleenp@4037: Klass* klass() { return _klass; } duke@435: int field_offset() { return _field_offset; } duke@435: }; duke@435: duke@435: class FilteredFieldsMap : AllStatic { duke@435: private: duke@435: static GrowableArray *_filtered_fields; duke@435: public: duke@435: static void initialize(); coleenp@4037: static bool is_filtered_field(Klass* klass, int field_offset) { duke@435: for (int i=0; i < _filtered_fields->length(); i++) { duke@435: if (klass == _filtered_fields->at(i)->klass() && duke@435: field_offset == _filtered_fields->at(i)->field_offset()) { duke@435: return true; duke@435: } duke@435: } duke@435: return false; duke@435: } coleenp@4037: static int filtered_fields_count(Klass* klass, bool local_only) { duke@435: int nflds = 0; duke@435: for (int i=0; i < _filtered_fields->length(); i++) { duke@435: if (local_only && klass == _filtered_fields->at(i)->klass()) { duke@435: nflds++; coleenp@4037: } else if (klass->is_subtype_of(_filtered_fields->at(i)->klass())) { duke@435: nflds++; duke@435: } duke@435: } duke@435: return nflds; duke@435: } coleenp@4037: // Enhance Class Redefinition Support coleenp@4037: static void classes_do(KlassClosure* f) { duke@435: for (int i = 0; i < _filtered_fields->length(); i++) { coleenp@4037: f->do_klass(_filtered_fields->at(i)->klass()); duke@435: } duke@435: } duke@435: }; duke@435: duke@435: duke@435: // A FilteredFieldStream streams over all fields in a class, superclasses and duke@435: // (super)interfaces. Streaming is done in reverse order (subclasses first, duke@435: // fields in reverse order) duke@435: // duke@435: // Usage: duke@435: // duke@435: // for (FilteredFieldStream st(k, false, false); !st.eos(); st.next()) { coleenp@2497: // Symbol* field_name = st.name(); duke@435: // ... duke@435: // } duke@435: duke@435: class FilteredFieldStream : public FieldStream { duke@435: private: duke@435: int _filtered_fields_count; duke@435: bool has_filtered_field() { return (_filtered_fields_count > 0); } duke@435: duke@435: public: duke@435: FilteredFieldStream(instanceKlassHandle klass, bool local_only, bool classes_only) duke@435: : FieldStream(klass, local_only, classes_only) { coleenp@4037: _filtered_fields_count = FilteredFieldsMap::filtered_fields_count((Klass*)klass(), local_only); duke@435: } duke@435: int field_count(); duke@435: void next() { never@3137: _index -= 1; duke@435: if (has_filtered_field()) { coleenp@4037: while (_index >=0 && FilteredFieldsMap::is_filtered_field((Klass*)_klass(), offset())) { never@3137: _index -= 1; duke@435: } duke@435: } duke@435: } duke@435: }; stefank@2314: stefank@2314: #endif // SHARE_VM_RUNTIME_REFLECTIONUTILS_HPP