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

 /*

  * Copyright (c) 1997, 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.

  *

  */

 #include "precompiled.hpp"

 #include "classfile/systemDictionary.hpp"

 #include "classfile/vmSymbols.hpp"

 #include "memory/resourceArea.hpp"

 #include "memory/universe.inline.hpp"

 #include "oops/annotations.hpp"

 #include "oops/instanceKlass.hpp"

 #include "oops/fieldStreams.hpp"

 #include "runtime/fieldDescriptor.hpp"

 #include "runtime/handles.inline.hpp"

 #include "runtime/signature.hpp"

 oop fieldDescriptor::loader() const {

   return _cp->pool_holder()->class_loader();

 }

 Symbol* fieldDescriptor::generic_signature() const {

   if (!has_generic_signature()) {

     return NULL;

   }

   int idx = 0;

   InstanceKlass* ik = field_holder();

   for (AllFieldStream fs(ik); !fs.done(); fs.next()) {

     if (idx == _index) {

       return fs.generic_signature();

     } else {

       idx ++;

     }

   }

   assert(false, "should never happen");

   return NULL;

 }

 AnnotationArray* fieldDescriptor::annotations() const {

   InstanceKlass* ik = field_holder();

   Array<AnnotationArray*>* md = ik->fields_annotations();

   if (md == NULL)

     return NULL;

   return md->at(index());

 }

 AnnotationArray* fieldDescriptor::type_annotations() const {

   InstanceKlass* ik = field_holder();

   Array<AnnotationArray*>* type_annos = ik->fields_type_annotations();

   if (type_annos == NULL)

     return NULL;

   return type_annos->at(index());

 }

 constantTag fieldDescriptor::initial_value_tag() const {

   return constants()->tag_at(initial_value_index());

 }

 jint fieldDescriptor::int_initial_value() const {

   return constants()->int_at(initial_value_index());

 }

 jlong fieldDescriptor::long_initial_value() const {

   return constants()->long_at(initial_value_index());

 }

 jfloat fieldDescriptor::float_initial_value() const {

   return constants()->float_at(initial_value_index());

 }

 jdouble fieldDescriptor::double_initial_value() const {

   return constants()->double_at(initial_value_index());

 }

 oop fieldDescriptor::string_initial_value(TRAPS) const {

   return constants()->uncached_string_at(initial_value_index(), CHECK_0);

 }

 void fieldDescriptor::reinitialize(InstanceKlass* ik, int index) {

   if (_cp.is_null() || field_holder() != ik) {

     _cp = constantPoolHandle(Thread::current(), ik->constants());

     // _cp should now reference ik's constant pool; i.e., ik is now field_holder.

     assert(field_holder() == ik, "must be already initialized to this class");

   }

   FieldInfo* f = ik->field(index);

   assert(!f->is_internal(), "regular Java fields only");

   _access_flags = accessFlags_from(f->access_flags());

   guarantee(f->name_index() != 0 && f->signature_index() != 0, "bad constant pool index for fieldDescriptor");

   _index = index;

   verify();

 }

 #ifndef PRODUCT

 void fieldDescriptor::verify() const {

   if (_cp.is_null()) {

     assert(_index == badInt, "constructor must be called");  // see constructor

   } else {

     assert(_index >= 0, "good index");

     assert(_index < field_holder()->java_fields_count(), "oob");

   }

 }

 void fieldDescriptor::print_on(outputStream* st) const {

   access_flags().print_on(st);

   name()->print_value_on(st);

   st->print(" ");

   signature()->print_value_on(st);

   st->print(" @%d ", offset());

   if (WizardMode && has_initial_value()) {

     st->print("(initval ");

     constantTag t = initial_value_tag();

     if (t.is_int()) {

       st->print("int %d)", int_initial_value());

     } else if (t.is_long()){

       st->print_jlong(long_initial_value());

     } else if (t.is_float()){

       st->print("float %f)", float_initial_value());

     } else if (t.is_double()){

       st->print("double %lf)", double_initial_value());

     }

   }

 }

 void fieldDescriptor::print_on_for(outputStream* st, oop obj) {

   print_on(st);

   BasicType ft = field_type();

   jint as_int = 0;

   switch (ft) {

     case T_BYTE:

       as_int = (jint)obj->byte_field(offset());

       st->print(" %d", obj->byte_field(offset()));

       break;

     case T_CHAR:

       as_int = (jint)obj->char_field(offset());

       {

         jchar c = obj->char_field(offset());

         as_int = c;

         st->print(" %c %d", isprint(c) ? c : ' ', c);

       }

       break;

     case T_DOUBLE:

       st->print(" %lf", obj->double_field(offset()));

       break;

     case T_FLOAT:

       as_int = obj->int_field(offset());

       st->print(" %f", obj->float_field(offset()));

       break;

     case T_INT:

       as_int = obj->int_field(offset());

       st->print(" %d", obj->int_field(offset()));

       break;

     case T_LONG:

       st->print(" ");

       st->print_jlong(obj->long_field(offset()));

       break;

     case T_SHORT:

       as_int = obj->short_field(offset());

       st->print(" %d", obj->short_field(offset()));

       break;

     case T_BOOLEAN:

       as_int = obj->bool_field(offset());

       st->print(" %s", obj->bool_field(offset()) ? "true" : "false");

       break;

     case T_ARRAY:

       st->print(" ");

       NOT_LP64(as_int = obj->int_field(offset()));

       obj->obj_field(offset())->print_value_on(st);

       break;

     case T_OBJECT:

       st->print(" ");

       NOT_LP64(as_int = obj->int_field(offset()));

       obj->obj_field(offset())->print_value_on(st);

       break;

     default:

       ShouldNotReachHere();

       break;

   }

   // Print a hint as to the underlying integer representation. This can be wrong for

   // pointers on an LP64 machine

   if (ft == T_LONG || ft == T_DOUBLE LP64_ONLY(|| !is_java_primitive(ft)) ) {

     st->print(" (%x %x)", obj->int_field(offset()), obj->int_field(offset()+sizeof(jint)));

   } else if (as_int < 0 || as_int > 9) {

     st->print(" (%x)", as_int);

   }

 }

 #endif /* PRODUCT */