--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/share/runtime/reflectionUtils.hpp Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,234 @@
+/*
+ * Copyright (c) 1999, 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_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:
+ InstanceKlass* _klass; // current klass/interface iterated over
+ InstanceKlass* _base_klass; // initial klass/interface to iterate over
+ Array<Klass*>* _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(InstanceKlass* klass, bool local_only, bool classes_only, bool walk_defaults);
+
+ // testing
+ bool eos();
+
+ // iterating
+ virtual void next() = 0;
+
+ // accessors
+ InstanceKlass* 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<Method*>* methods() {
+ if (base_class_search_defaults()) {
+ base_class_search_defaults(false);
+ return _klass->default_methods();
+ } else {
+ return _klass->methods();
+ }
+ }
+ public:
+ MethodStream(InstanceKlass* 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(InstanceKlass* 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<fieldDescriptor&>(_fd_buf);
+ field.reinitialize(_klass, _index);
+ return field;
+ }
+};
+
+class FilteredField : public CHeapObj<mtInternal> {
+ 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<FilteredField *> *_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;
+ }
+};
+
+
+// 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(InstanceKlass* klass, bool local_only, bool classes_only)
+ : FieldStream(klass, local_only, classes_only) {
+ _filtered_fields_count = FilteredFieldsMap::filtered_fields_count(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