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src/hotspot/share/runtime/fieldDescriptor.cpp

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 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 20  * or visit www.oracle.com if you need additional information or have any
 21  * questions.
 22  *
 23  */
 24 
 25 #include "precompiled.hpp"
 26 #include "classfile/vmSymbols.hpp"
 27 #include "memory/resourceArea.hpp"
 28 #include "oops/annotations.hpp"
 29 #include "oops/constantPool.hpp"
 30 #include "oops/instanceKlass.hpp"
 31 #include "oops/klass.inline.hpp"
 32 #include "oops/oop.inline.hpp"
 33 #include "oops/fieldStreams.inline.hpp"

 34 #include "runtime/fieldDescriptor.inline.hpp"
 35 #include "runtime/handles.inline.hpp"
 36 #include "runtime/signature.hpp"
 37 
 38 
 39 oop fieldDescriptor::loader() const {
 40   return _cp->pool_holder()->class_loader();
 41 }
 42 
 43 Symbol* fieldDescriptor::generic_signature() const {
 44   if (!has_generic_signature()) {
 45     return NULL;
 46   }
 47 
 48   int idx = 0;
 49   InstanceKlass* ik = field_holder();
 50   for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
 51     if (idx == _index) {
 52       return fs.generic_signature();
 53     } else {
 54       idx ++;
 55     }
 56   }
 57   assert(false, "should never happen");
 58   return vmSymbols::void_signature(); // return a default value (for code analyzers)
 59 }
 60 
 61 bool fieldDescriptor::is_trusted_final() const {
 62   InstanceKlass* ik = field_holder();
 63   return is_final() && (is_static() || ik->is_hidden() || ik->is_record());
 64 }
 65 
 66 AnnotationArray* fieldDescriptor::annotations() const {
 67   InstanceKlass* ik = field_holder();
 68   Array<AnnotationArray*>* md = ik->fields_annotations();
 69   if (md == NULL)
 70     return NULL;
 71   return md->at(index());
 72 }
 73 
 74 AnnotationArray* fieldDescriptor::type_annotations() const {
 75   InstanceKlass* ik = field_holder();
 76   Array<AnnotationArray*>* type_annos = ik->fields_type_annotations();
 77   if (type_annos == NULL)
 78     return NULL;
 79   return type_annos->at(index());
 80 }
 81 
 82 constantTag fieldDescriptor::initial_value_tag() const {
 83   return constants()->tag_at(initial_value_index());

138   signature()->print_value_on(st);
139   st->print(" @%d ", offset());
140   if (WizardMode && has_initial_value()) {
141     st->print("(initval ");
142     constantTag t = initial_value_tag();
143     if (t.is_int()) {
144       st->print("int %d)", int_initial_value());
145     } else if (t.is_long()){
146       st->print_jlong(long_initial_value());
147     } else if (t.is_float()){
148       st->print("float %f)", float_initial_value());
149     } else if (t.is_double()){
150       st->print("double %lf)", double_initial_value());
151     }
152   }
153 }
154 
155 void fieldDescriptor::print() const { print_on(tty); }
156 
157 void fieldDescriptor::print_on_for(outputStream* st, oop obj) {
158   print_on(st);
159   BasicType ft = field_type();



160   jint as_int = 0;
161   switch (ft) {
162     case T_BYTE:
163       as_int = (jint)obj->byte_field(offset());
164       st->print(" %d", obj->byte_field(offset()));
165       break;
166     case T_CHAR:
167       as_int = (jint)obj->char_field(offset());
168       {
169         jchar c = obj->char_field(offset());
170         as_int = c;
171         st->print(" %c %d", isprint(c) ? c : ' ', c);
172       }
173       break;
174     case T_DOUBLE:
175       st->print(" %lf", obj->double_field(offset()));
176       break;
177     case T_FLOAT:
178       as_int = obj->int_field(offset());
179       st->print(" %f", obj->float_field(offset()));
180       break;
181     case T_INT:
182       as_int = obj->int_field(offset());
183       st->print(" %d", obj->int_field(offset()));
184       break;
185     case T_LONG:
186       st->print(" ");
187       st->print_jlong(obj->long_field(offset()));
188       break;
189     case T_SHORT:
190       as_int = obj->short_field(offset());
191       st->print(" %d", obj->short_field(offset()));
192       break;
193     case T_BOOLEAN:
194       as_int = obj->bool_field(offset());
195       st->print(" %s", obj->bool_field(offset()) ? "true" : "false");
196       break;
197     case T_ARRAY:
198       st->print(" ");
199       NOT_LP64(as_int = obj->int_field(offset()));
200       if (obj->obj_field(offset()) != NULL) {
201         obj->obj_field(offset())->print_value_on(st);
202       } else {
203         st->print("NULL");



204       }
205       break;

206     case T_OBJECT:
207       st->print(" ");
208       NOT_LP64(as_int = obj->int_field(offset()));
209       if (obj->obj_field(offset()) != NULL) {
210         obj->obj_field(offset())->print_value_on(st);
211       } else {
212         st->print("NULL");
213       }
214       break;
215     default:
216       ShouldNotReachHere();
217       break;
218   }
219   // Print a hint as to the underlying integer representation. This can be wrong for
220   // pointers on an LP64 machine
221 #ifdef _LP64
222   if (is_reference_type(ft) && UseCompressedOops) {
223     st->print(" (%x)", obj->int_field(offset()));
224   }
225   else // <- intended
226 #endif
227   if (ft == T_LONG || ft == T_DOUBLE LP64_ONLY(|| !is_java_primitive(ft)) ) {
228     st->print(" (%x %x)", obj->int_field(offset()), obj->int_field(offset()+sizeof(jint)));
229   } else if (as_int < 0 || as_int > 9) {
230     st->print(" (%x)", as_int);
231   }

232 }
233 

 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 20  * or visit www.oracle.com if you need additional information or have any
 21  * questions.
 22  *
 23  */
 24 
 25 #include "precompiled.hpp"
 26 #include "classfile/vmSymbols.hpp"
 27 #include "memory/resourceArea.hpp"
 28 #include "oops/annotations.hpp"
 29 #include "oops/constantPool.hpp"
 30 #include "oops/instanceKlass.hpp"
 31 #include "oops/klass.inline.hpp"
 32 #include "oops/oop.inline.hpp"
 33 #include "oops/fieldStreams.inline.hpp"
 34 #include "oops/inlineKlass.inline.hpp"
 35 #include "runtime/fieldDescriptor.inline.hpp"
 36 #include "runtime/handles.inline.hpp"
 37 #include "runtime/signature.hpp"
 38 
 39 
 40 oop fieldDescriptor::loader() const {
 41   return _cp->pool_holder()->class_loader();
 42 }
 43 
 44 Symbol* fieldDescriptor::generic_signature() const {
 45   if (!has_generic_signature()) {
 46     return NULL;
 47   }
 48 
 49   int idx = 0;
 50   InstanceKlass* ik = field_holder();
 51   for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
 52     if (idx == _index) {
 53       return fs.generic_signature();
 54     } else {
 55       idx ++;
 56     }
 57   }
 58   assert(false, "should never happen");
 59   return vmSymbols::void_signature(); // return a default value (for code analyzers)
 60 }
 61 
 62 bool fieldDescriptor::is_trusted_final() const {
 63   InstanceKlass* ik = field_holder();
 64   return is_final() && (is_static() || ik->is_hidden() || ik->is_record() || ik->is_inline_klass());
 65 }
 66 
 67 AnnotationArray* fieldDescriptor::annotations() const {
 68   InstanceKlass* ik = field_holder();
 69   Array<AnnotationArray*>* md = ik->fields_annotations();
 70   if (md == NULL)
 71     return NULL;
 72   return md->at(index());
 73 }
 74 
 75 AnnotationArray* fieldDescriptor::type_annotations() const {
 76   InstanceKlass* ik = field_holder();
 77   Array<AnnotationArray*>* type_annos = ik->fields_type_annotations();
 78   if (type_annos == NULL)
 79     return NULL;
 80   return type_annos->at(index());
 81 }
 82 
 83 constantTag fieldDescriptor::initial_value_tag() const {
 84   return constants()->tag_at(initial_value_index());

139   signature()->print_value_on(st);
140   st->print(" @%d ", offset());
141   if (WizardMode && has_initial_value()) {
142     st->print("(initval ");
143     constantTag t = initial_value_tag();
144     if (t.is_int()) {
145       st->print("int %d)", int_initial_value());
146     } else if (t.is_long()){
147       st->print_jlong(long_initial_value());
148     } else if (t.is_float()){
149       st->print("float %f)", float_initial_value());
150     } else if (t.is_double()){
151       st->print("double %lf)", double_initial_value());
152     }
153   }
154 }
155 
156 void fieldDescriptor::print() const { print_on(tty); }
157 
158 void fieldDescriptor::print_on_for(outputStream* st, oop obj) {

159   BasicType ft = field_type();
160   if (ft != T_INLINE_TYPE) {
161     print_on(st);
162   }
163   jint as_int = 0;
164   switch (ft) {
165     case T_BYTE:
166       as_int = (jint)obj->byte_field(offset());
167       st->print(" %d", obj->byte_field(offset()));
168       break;
169     case T_CHAR:
170       as_int = (jint)obj->char_field(offset());
171       {
172         jchar c = obj->char_field(offset());
173         as_int = c;
174         st->print(" %c %d", isprint(c) ? c : ' ', c);
175       }
176       break;
177     case T_DOUBLE:
178       st->print(" %lf", obj->double_field(offset()));
179       break;
180     case T_FLOAT:
181       as_int = obj->int_field(offset());
182       st->print(" %f", obj->float_field(offset()));
183       break;
184     case T_INT:
185       as_int = obj->int_field(offset());
186       st->print(" %d", obj->int_field(offset()));
187       break;
188     case T_LONG:
189       st->print(" ");
190       st->print_jlong(obj->long_field(offset()));
191       break;
192     case T_SHORT:
193       as_int = obj->short_field(offset());
194       st->print(" %d", obj->short_field(offset()));
195       break;
196     case T_BOOLEAN:
197       as_int = obj->bool_field(offset());
198       st->print(" %s", obj->bool_field(offset()) ? "true" : "false");
199       break;
200     case T_INLINE_TYPE:
201       if (is_inlined()) {
202         // Print fields of inlined fields (recursively)
203         InlineKlass* vk = InlineKlass::cast(field_holder()->get_inline_type_field_klass(index()));
204         int field_offset = offset() - vk->first_field_offset();
205         obj = cast_to_oop(cast_from_oop<address>(obj) + field_offset);
206         st->print_cr("Inline type field inlined '%s':", vk->name()->as_C_string());
207         FieldPrinter print_field(st, obj);
208         vk->do_nonstatic_fields(&print_field);
209         return; // Do not print underlying representation
210       }
211       // inline type field not inlined, fall through
212     case T_ARRAY:
213     case T_OBJECT:
214       st->print(" ");
215       NOT_LP64(as_int = obj->int_field(offset()));
216       if (obj->obj_field(offset()) != NULL) {
217         obj->obj_field(offset())->print_value_on(st);
218       } else {
219         st->print("NULL");
220       }
221       break;
222     default:
223       ShouldNotReachHere();
224       break;
225   }
226   // Print a hint as to the underlying integer representation. This can be wrong for
227   // pointers on an LP64 machine
228 #ifdef _LP64
229   if (is_reference_type(ft) && UseCompressedOops) {
230     st->print(" (%x)", obj->int_field(offset()));
231   }
232   else // <- intended
233 #endif
234   if (ft == T_LONG || ft == T_DOUBLE LP64_ONLY(|| !is_java_primitive(ft)) ) {
235     st->print(" (%x %x)", obj->int_field(offset()), obj->int_field(offset()+sizeof(jint)));
236   } else if (as_int < 0 || as_int > 9) {
237     st->print(" (%x)", as_int);
238   }
239   st->cr();
240 }
241 
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