1 /*

     2  * Copyright 1997-2005 Sun Microsystems, Inc.  All Rights Reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    20  * CA 95054 USA or visit www.sun.com if you need additional information or

    21  * have any questions.

    22  *

    23  */

    24 

    25 # include "incls/_precompiled.incl"

    26 #include "incls/_fieldDescriptor.cpp.incl"

    27 

    28 

    29 oop fieldDescriptor::loader() const {

    30   return instanceKlass::cast(_cp->pool_holder())->class_loader();

    31 }

    32 

    33 typeArrayOop fieldDescriptor::annotations() const {

    34   instanceKlass* ik = instanceKlass::cast(field_holder());

    35   objArrayOop md = ik->fields_annotations();

    36   if (md == NULL)

    37     return NULL;

    38   assert((index() % instanceKlass::next_offset) == 0, "");

    39   return typeArrayOop(md->obj_at(index() / instanceKlass::next_offset));

    40 }

    41 

    42 constantTag fieldDescriptor::initial_value_tag() const {

    43   return constants()->tag_at(_initial_value_index);

    44 }

    45 

    46 jint fieldDescriptor::int_initial_value() const {

    47   return constants()->int_at(_initial_value_index);

    48 }

    49 

    50 jlong fieldDescriptor::long_initial_value() const {

    51   return constants()->long_at(_initial_value_index);

    52 }

    53 

    54 jfloat fieldDescriptor::float_initial_value() const {

    55   return constants()->float_at(_initial_value_index);

    56 }

    57 

    58 jdouble fieldDescriptor::double_initial_value() const {

    59   return constants()->double_at(_initial_value_index);

    60 }

    61 

    62 oop fieldDescriptor::string_initial_value(TRAPS) const {

    63   return constants()->string_at(_initial_value_index, CHECK_0);

    64 }

    65 

    66 void fieldDescriptor::initialize(klassOop k, int index) {

    67   instanceKlass* ik = instanceKlass::cast(k);

    68   _cp = ik->constants();

    69   typeArrayOop fields = ik->fields();

    70 

    71   assert(fields->length() % instanceKlass::next_offset == 0, "Illegal size of field array");

    72   assert(fields->length() >= index + instanceKlass::next_offset, "Illegal size of field array");

    73 

    74   _access_flags.set_field_flags(fields->ushort_at(index + instanceKlass::access_flags_offset));

    75   _name_index = fields->ushort_at(index + instanceKlass::name_index_offset);

    76   _signature_index = fields->ushort_at(index + instanceKlass::signature_index_offset);

    77   _initial_value_index = fields->ushort_at(index + instanceKlass::initval_index_offset);

    78   guarantee(_name_index != 0 && _signature_index != 0, "bad constant pool index for fieldDescriptor");

    79   _offset = ik->offset_from_fields( index );

    80   _generic_signature_index = fields->ushort_at(index + instanceKlass::generic_signature_offset);

    81   _index = index;

    82 }

    83 

    84 #ifndef PRODUCT

    85 

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

    87   _access_flags.print_on(st);

    88   constants()->symbol_at(_name_index)->print_value_on(st);

    89   st->print(" ");

    90   constants()->symbol_at(_signature_index)->print_value_on(st);

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

    92   if (WizardMode && has_initial_value()) {

    93     st->print("(initval ");

    94     constantTag t = initial_value_tag();

    95     if (t.is_int()) {

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

    97     } else if (t.is_long()){

    98       st->print_jlong(long_initial_value());

    99     } else if (t.is_float()){

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

   101     } else if (t.is_double()){

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

   103     }

   104   }

   105 }

   106 

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

   108   print_on(st);

   109   BasicType ft = field_type();

   110   jint as_int;

   111   switch (ft) {

   112     case T_BYTE:

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

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

   115       break;

   116     case T_CHAR:

   117       {

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

   119         as_int = c;

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

   121       }

   122       break;

   123     case T_DOUBLE:

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

   125       break;

   126     case T_FLOAT:

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

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

   129       break;

   130     case T_INT:

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

   132       break;

   133     case T_LONG:

   134       st->print(" ");

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

   136       break;

   137     case T_SHORT:

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

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

   140       break;

   141     case T_BOOLEAN:

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

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

   144       break;

   145     case T_ARRAY:

   146       st->print(" ");

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

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

   149       break;

   150     case T_OBJECT:

   151       st->print(" ");

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

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

   154       break;

   155     default:

   156       ShouldNotReachHere();

   157       break;

   158   }

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

   160   // pointers on an LP64 machine

   161   if (ft == T_LONG || ft == T_DOUBLE) {

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

   163   } else {

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

   165   }

   166 }

   167 

   168 #endif /* PRODUCT */