aoqi@0: /*
aoqi@0:  * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
aoqi@0:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0:  *
aoqi@0:  * This code is free software; you can redistribute it and/or modify it
aoqi@0:  * under the terms of the GNU General Public License version 2 only, as
aoqi@0:  * published by the Free Software Foundation.
aoqi@0:  *
aoqi@0:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0:  * accompanied this code).
aoqi@0:  *
aoqi@0:  * You should have received a copy of the GNU General Public License version
aoqi@0:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0:  *
aoqi@0:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0:  * or visit www.oracle.com if you need additional information or have any
aoqi@0:  * questions.
aoqi@0:  *
aoqi@0:  */
aoqi@0: 
aoqi@0: #include "precompiled.hpp"
aoqi@0: #include "classfile/systemDictionary.hpp"
aoqi@0: #include "classfile/vmSymbols.hpp"
aoqi@0: #include "memory/resourceArea.hpp"
aoqi@0: #include "memory/universe.inline.hpp"
aoqi@0: #include "oops/annotations.hpp"
aoqi@0: #include "oops/instanceKlass.hpp"
aoqi@0: #include "oops/fieldStreams.hpp"
aoqi@0: #include "runtime/fieldDescriptor.hpp"
aoqi@0: #include "runtime/handles.inline.hpp"
aoqi@0: #include "runtime/signature.hpp"
aoqi@0: 
aoqi@0: 
aoqi@0: oop fieldDescriptor::loader() const {
aoqi@0:   return _cp->pool_holder()->class_loader();
aoqi@0: }
aoqi@0: 
aoqi@0: Symbol* fieldDescriptor::generic_signature() const {
aoqi@0:   if (!has_generic_signature()) {
aoqi@0:     return NULL;
aoqi@0:   }
aoqi@0: 
aoqi@0:   int idx = 0;
aoqi@0:   InstanceKlass* ik = field_holder();
aoqi@0:   for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
aoqi@0:     if (idx == _index) {
aoqi@0:       return fs.generic_signature();
aoqi@0:     } else {
aoqi@0:       idx ++;
aoqi@0:     }
aoqi@0:   }
aoqi@0:   assert(false, "should never happen");
aoqi@0:   return NULL;
aoqi@0: }
aoqi@0: 
aoqi@0: AnnotationArray* fieldDescriptor::annotations() const {
aoqi@0:   InstanceKlass* ik = field_holder();
aoqi@0:   Array<AnnotationArray*>* md = ik->fields_annotations();
aoqi@0:   if (md == NULL)
aoqi@0:     return NULL;
aoqi@0:   return md->at(index());
aoqi@0: }
aoqi@0: 
aoqi@0: AnnotationArray* fieldDescriptor::type_annotations() const {
aoqi@0:   InstanceKlass* ik = field_holder();
aoqi@0:   Array<AnnotationArray*>* type_annos = ik->fields_type_annotations();
aoqi@0:   if (type_annos == NULL)
aoqi@0:     return NULL;
aoqi@0:   return type_annos->at(index());
aoqi@0: }
aoqi@0: 
aoqi@0: constantTag fieldDescriptor::initial_value_tag() const {
aoqi@0:   return constants()->tag_at(initial_value_index());
aoqi@0: }
aoqi@0: 
aoqi@0: jint fieldDescriptor::int_initial_value() const {
aoqi@0:   return constants()->int_at(initial_value_index());
aoqi@0: }
aoqi@0: 
aoqi@0: jlong fieldDescriptor::long_initial_value() const {
aoqi@0:   return constants()->long_at(initial_value_index());
aoqi@0: }
aoqi@0: 
aoqi@0: jfloat fieldDescriptor::float_initial_value() const {
aoqi@0:   return constants()->float_at(initial_value_index());
aoqi@0: }
aoqi@0: 
aoqi@0: jdouble fieldDescriptor::double_initial_value() const {
aoqi@0:   return constants()->double_at(initial_value_index());
aoqi@0: }
aoqi@0: 
aoqi@0: oop fieldDescriptor::string_initial_value(TRAPS) const {
aoqi@0:   return constants()->uncached_string_at(initial_value_index(), CHECK_0);
aoqi@0: }
aoqi@0: 
aoqi@0: void fieldDescriptor::reinitialize(InstanceKlass* ik, int index) {
aoqi@0:   if (_cp.is_null() || field_holder() != ik) {
aoqi@0:     _cp = constantPoolHandle(Thread::current(), ik->constants());
aoqi@0:     // _cp should now reference ik's constant pool; i.e., ik is now field_holder.
aoqi@0:     assert(field_holder() == ik, "must be already initialized to this class");
aoqi@0:   }
aoqi@0:   FieldInfo* f = ik->field(index);
aoqi@0:   assert(!f->is_internal(), "regular Java fields only");
aoqi@0: 
aoqi@0:   _access_flags = accessFlags_from(f->access_flags());
aoqi@0:   guarantee(f->name_index() != 0 && f->signature_index() != 0, "bad constant pool index for fieldDescriptor");
aoqi@0:   _index = index;
aoqi@0:   verify();
aoqi@0: }
aoqi@0: 
aoqi@0: #ifndef PRODUCT
aoqi@0: 
aoqi@0: void fieldDescriptor::verify() const {
aoqi@0:   if (_cp.is_null()) {
aoqi@0:     assert(_index == badInt, "constructor must be called");  // see constructor
aoqi@0:   } else {
aoqi@0:     assert(_index >= 0, "good index");
aoqi@0:     assert(_index < field_holder()->java_fields_count(), "oob");
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: void fieldDescriptor::print_on(outputStream* st) const {
aoqi@0:   access_flags().print_on(st);
aoqi@0:   name()->print_value_on(st);
aoqi@0:   st->print(" ");
aoqi@0:   signature()->print_value_on(st);
aoqi@0:   st->print(" @%d ", offset());
aoqi@0:   if (WizardMode && has_initial_value()) {
aoqi@0:     st->print("(initval ");
aoqi@0:     constantTag t = initial_value_tag();
aoqi@0:     if (t.is_int()) {
aoqi@0:       st->print("int %d)", int_initial_value());
aoqi@0:     } else if (t.is_long()){
aoqi@0:       st->print_jlong(long_initial_value());
aoqi@0:     } else if (t.is_float()){
aoqi@0:       st->print("float %f)", float_initial_value());
aoqi@0:     } else if (t.is_double()){
aoqi@0:       st->print("double %lf)", double_initial_value());
aoqi@0:     }
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: void fieldDescriptor::print_on_for(outputStream* st, oop obj) {
aoqi@0:   print_on(st);
aoqi@0:   BasicType ft = field_type();
aoqi@0:   jint as_int = 0;
aoqi@0:   switch (ft) {
aoqi@0:     case T_BYTE:
aoqi@0:       as_int = (jint)obj->byte_field(offset());
aoqi@0:       st->print(" %d", obj->byte_field(offset()));
aoqi@0:       break;
aoqi@0:     case T_CHAR:
aoqi@0:       as_int = (jint)obj->char_field(offset());
aoqi@0:       {
aoqi@0:         jchar c = obj->char_field(offset());
aoqi@0:         as_int = c;
aoqi@0:         st->print(" %c %d", isprint(c) ? c : ' ', c);
aoqi@0:       }
aoqi@0:       break;
aoqi@0:     case T_DOUBLE:
aoqi@0:       st->print(" %lf", obj->double_field(offset()));
aoqi@0:       break;
aoqi@0:     case T_FLOAT:
aoqi@0:       as_int = obj->int_field(offset());
aoqi@0:       st->print(" %f", obj->float_field(offset()));
aoqi@0:       break;
aoqi@0:     case T_INT:
aoqi@0:       as_int = obj->int_field(offset());
aoqi@0:       st->print(" %d", obj->int_field(offset()));
aoqi@0:       break;
aoqi@0:     case T_LONG:
aoqi@0:       st->print(" ");
aoqi@0:       st->print_jlong(obj->long_field(offset()));
aoqi@0:       break;
aoqi@0:     case T_SHORT:
aoqi@0:       as_int = obj->short_field(offset());
aoqi@0:       st->print(" %d", obj->short_field(offset()));
aoqi@0:       break;
aoqi@0:     case T_BOOLEAN:
aoqi@0:       as_int = obj->bool_field(offset());
aoqi@0:       st->print(" %s", obj->bool_field(offset()) ? "true" : "false");
aoqi@0:       break;
aoqi@0:     case T_ARRAY:
aoqi@0:       st->print(" ");
aoqi@0:       NOT_LP64(as_int = obj->int_field(offset()));
aoqi@0:       obj->obj_field(offset())->print_value_on(st);
aoqi@0:       break;
aoqi@0:     case T_OBJECT:
aoqi@0:       st->print(" ");
aoqi@0:       NOT_LP64(as_int = obj->int_field(offset()));
aoqi@0:       obj->obj_field(offset())->print_value_on(st);
aoqi@0:       break;
aoqi@0:     default:
aoqi@0:       ShouldNotReachHere();
aoqi@0:       break;
aoqi@0:   }
aoqi@0:   // Print a hint as to the underlying integer representation. This can be wrong for
aoqi@0:   // pointers on an LP64 machine
aoqi@0:   if (ft == T_LONG || ft == T_DOUBLE LP64_ONLY(|| !is_java_primitive(ft)) ) {
aoqi@0:     st->print(" (%x %x)", obj->int_field(offset()), obj->int_field(offset()+sizeof(jint)));
aoqi@0:   } else if (as_int < 0 || as_int > 9) {
aoqi@0:     st->print(" (%x)", as_int);
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: #endif /* PRODUCT */