jdk8-mips64-public/hotspot: comparison src/share/vm/oops/fieldStreams.hpp

--1:000000000000
+:f90c822e73f8
+/*
+* Copyright (c) 2011, 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_OOPS_FIELDSTREAMS_HPP
+#define SHARE_VM_OOPS_FIELDSTREAMS_HPP
+#include "oops/instanceKlass.hpp"
+#include "oops/fieldInfo.hpp"
+#include "runtime/fieldDescriptor.hpp"
+// The is the base class for iteration over the fields array
+// describing the declared fields in the class.  Several subclasses
+// are provided depending on the kind of iteration required.  The
+// JavaFieldStream is for iterating over regular Java fields and it
+// generally the preferred iterator.  InternalFieldStream only
+// iterates over fields that have been injected by the JVM.
+// AllFieldStream exposes all fields and should only be used in rare
+// cases.
+class FieldStreamBase : public StackObj {
+protected:
+Array<u2>*          _fields;
+constantPoolHandle  _constants;
+int                 _index;
+int                 _limit;
+int                 _generic_signature_slot;
+fieldDescriptor     _fd_buf;
+FieldInfo* field() const { return FieldInfo::from_field_array(_fields, _index); }
+InstanceKlass* field_holder() const { return _constants->pool_holder(); }
+int init_generic_signature_start_slot() {
+int length = _fields->length();
+int num_fields = 0;
+int skipped_generic_signature_slots = 0;
+FieldInfo* fi;
+AccessFlags flags;
+/* Scan from 0 to the current _index. Count the number of generic
+signature slots for field[0] to field[_index - 1]. */
+for (int i = 0; i < _index; i++) {
+fi = FieldInfo::from_field_array(_fields, i);
+flags.set_flags(fi->access_flags());
+if (flags.field_has_generic_signature()) {
+length --;
+skipped_generic_signature_slots ++;
+}
+}
+/* Scan from the current _index. */
+for (int i = _index; i*FieldInfo::field_slots < length; i++) {
+fi = FieldInfo::from_field_array(_fields, i);
+flags.set_flags(fi->access_flags());
+if (flags.field_has_generic_signature()) {
+length --;
+}
+num_fields ++;
+}
+_generic_signature_slot = length + skipped_generic_signature_slots;
+assert(_generic_signature_slot <= _fields->length(), "");
+return num_fields;
+}
+FieldStreamBase(Array<u2>* fields, constantPoolHandle constants, int start, int limit) {
+_fields = fields;
+_constants = constants;
+_index = start;
+int num_fields = init_generic_signature_start_slot();
+if (limit < start) {
+_limit = num_fields;
+} else {
+_limit = limit;
+}
+}
+FieldStreamBase(Array<u2>* fields, constantPoolHandle constants) {
+_fields = fields;
+_constants = constants;
+_index = 0;
+_limit = init_generic_signature_start_slot();
+}
+public:
+FieldStreamBase(InstanceKlass* klass) {
+_fields = klass->fields();
+_constants = klass->constants();
+_index = 0;
+_limit = klass->java_fields_count();
+init_generic_signature_start_slot();
+assert(klass == field_holder(), "");
+}
+FieldStreamBase(instanceKlassHandle klass) {
+_fields = klass->fields();
+_constants = klass->constants();
+_index = 0;
+_limit = klass->java_fields_count();
+init_generic_signature_start_slot();
+assert(klass == field_holder(), "");
+}
+// accessors
+int index() const                 { return _index; }
+void next() {
+if (access_flags().field_has_generic_signature()) {
+_generic_signature_slot ++;
+assert(_generic_signature_slot <= _fields->length(), "");
+}
+_index += 1;
+}
+bool done() const { return _index >= _limit; }
+// Accessors for current field
+AccessFlags access_flags() const {
+AccessFlags flags;
+flags.set_flags(field()->access_flags());
+return flags;
+}
+void set_access_flags(u2 flags) const {
+field()->set_access_flags(flags);
+}
+void set_access_flags(AccessFlags flags) const {
+set_access_flags(flags.as_short());
+}
+Symbol* name() const {
+return field()->name(_constants);
+}
+Symbol* signature() const {
+return field()->signature(_constants);
+}
+Symbol* generic_signature() const {
+if (access_flags().field_has_generic_signature()) {
+assert(_generic_signature_slot < _fields->length(), "out of bounds");
+int index = _fields->at(_generic_signature_slot);
+return _constants->symbol_at(index);
+} else {
+return NULL;
+}
+}
+int offset() const {
+return field()->offset();
+}
+int allocation_type() const {
+return field()->allocation_type();
+}
+void set_offset(int offset) {
+field()->set_offset(offset);
+}
+bool is_offset_set() const {
+return field()->is_offset_set();
+}
+bool is_contended() const {
+return field()->is_contended();
+}
+int contended_group() const {
+return field()->contended_group();
+}
+// bridge to a heavier API:
+fieldDescriptor& field_descriptor() const {
+fieldDescriptor& field = const_cast<fieldDescriptor&>(_fd_buf);
+field.reinitialize(field_holder(), _index);
+return field;
+}
+};
+// Iterate over only the internal fields
+class JavaFieldStream : public FieldStreamBase {
+public:
+JavaFieldStream(instanceKlassHandle k): FieldStreamBase(k->fields(), k->constants(), 0, k->java_fields_count()) {}
+int name_index() const {
+assert(!field()->is_internal(), "regular only");
+return field()->name_index();
+}
+void set_name_index(int index) {
+assert(!field()->is_internal(), "regular only");
+field()->set_name_index(index);
+}
+int signature_index() const {
+assert(!field()->is_internal(), "regular only");
+return field()->signature_index();
+}
+void set_signature_index(int index) {
+assert(!field()->is_internal(), "regular only");
+field()->set_signature_index(index);
+}
+int generic_signature_index() const {
+assert(!field()->is_internal(), "regular only");
+if (access_flags().field_has_generic_signature()) {
+assert(_generic_signature_slot < _fields->length(), "out of bounds");
+return _fields->at(_generic_signature_slot);
+} else {
+return 0;
+}
+}
+void set_generic_signature_index(int index) {
+assert(!field()->is_internal(), "regular only");
+if (access_flags().field_has_generic_signature()) {
+assert(_generic_signature_slot < _fields->length(), "out of bounds");
+_fields->at_put(_generic_signature_slot, index);
+}
+}
+int initval_index() const {
+assert(!field()->is_internal(), "regular only");
+return field()->initval_index();
+}
+void set_initval_index(int index) {
+assert(!field()->is_internal(), "regular only");
+return field()->set_initval_index(index);
+}
+};
+// Iterate over only the internal fields
+class InternalFieldStream : public FieldStreamBase {
+public:
+InternalFieldStream(InstanceKlass* k):      FieldStreamBase(k->fields(), k->constants(), k->java_fields_count(), 0) {}
+InternalFieldStream(instanceKlassHandle k): FieldStreamBase(k->fields(), k->constants(), k->java_fields_count(), 0) {}
+};
+class AllFieldStream : public FieldStreamBase {
+public:
+AllFieldStream(Array<u2>* fields, constantPoolHandle constants): FieldStreamBase(fields, constants) {}
+AllFieldStream(InstanceKlass* k):      FieldStreamBase(k->fields(), k->constants()) {}
+AllFieldStream(instanceKlassHandle k): FieldStreamBase(k->fields(), k->constants()) {}
+};
+#endif // SHARE_VM_OOPS_FIELDSTREAMS_HPP

Mercurial > jdk8-mips64-public > hotspot / file comparison

comparison: src/share/vm/oops/fieldStreams.hpp

src/share/vm/oops/fieldStreams.hpp