1 /*
   2  * Copyright (c) 1999, 2014, Oracle and/or its affiliates. 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 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 "ci/ciField.hpp"
  27 #include "ci/ciInstance.hpp"
  28 #include "ci/ciInstanceKlass.hpp"
  29 #include "ci/ciUtilities.hpp"
  30 #include "classfile/systemDictionary.hpp"
  31 #include "memory/allocation.hpp"
  32 #include "memory/allocation.inline.hpp"
  33 #include "oops/oop.inline.hpp"
  34 #include "oops/fieldStreams.hpp"
  35 #include "runtime/fieldDescriptor.hpp"
  36 
  37 // ciInstanceKlass
  38 //
  39 // This class represents a Klass* in the HotSpot virtual machine
  40 // whose Klass part in an InstanceKlass.
  41 
  42 // ------------------------------------------------------------------
  43 // ciInstanceKlass::ciInstanceKlass
  44 //
  45 // Loaded instance klass.
  46 ciInstanceKlass::ciInstanceKlass(KlassHandle h_k) :
  47   ciKlass(h_k)
  48 {
  49   assert(get_Klass()->oop_is_instance(), "wrong type");
  50   assert(get_instanceKlass()->is_loaded(), "must be at least loaded");
  51   InstanceKlass* ik = get_instanceKlass();
  52 
  53   AccessFlags access_flags = ik->access_flags();
  54   _flags = ciFlags(access_flags);
  55   _has_finalizer = access_flags.has_finalizer();
  56   _has_subklass = ik->subklass() != NULL;
  57   _init_state = ik->init_state();
  58   _nonstatic_field_size = ik->nonstatic_field_size();
  59   _has_nonstatic_fields = ik->has_nonstatic_fields();
  60   _has_default_methods = ik->has_default_methods();
  61   _nonstatic_fields = NULL; // initialized lazily by compute_nonstatic_fields:
  62   _has_injected_fields = -1;
  63   _implementor = NULL; // we will fill these lazily
  64 
  65   Thread *thread = Thread::current();
  66   if (ciObjectFactory::is_initialized()) {
  67     _loader = JNIHandles::make_local(thread, ik->class_loader());
  68     _protection_domain = JNIHandles::make_local(thread,
  69                                                 ik->protection_domain());
  70     _is_shared = false;
  71   } else {
  72     Handle h_loader(thread, ik->class_loader());
  73     Handle h_protection_domain(thread, ik->protection_domain());
  74     _loader = JNIHandles::make_global(h_loader);
  75     _protection_domain = JNIHandles::make_global(h_protection_domain);
  76     _is_shared = true;
  77   }
  78 
  79   // Lazy fields get filled in only upon request.
  80   _super  = NULL;
  81   _java_mirror = NULL;
  82 
  83   if (is_shared()) {
  84     if (h_k() != SystemDictionary::Object_klass()) {
  85       super();
  86     }
  87     //compute_nonstatic_fields();  // done outside of constructor
  88   }
  89 
  90   _field_cache = NULL;
  91 }
  92 
  93 // Version for unloaded classes:
  94 ciInstanceKlass::ciInstanceKlass(ciSymbol* name,
  95                                  jobject loader, jobject protection_domain)
  96   : ciKlass(name, T_OBJECT)
  97 {
  98   assert(name->byte_at(0) != '[', "not an instance klass");
  99   _init_state = (InstanceKlass::ClassState)0;
 100   _nonstatic_field_size = -1;
 101   _has_nonstatic_fields = false;
 102   _nonstatic_fields = NULL;
 103   _has_injected_fields = -1;
 104   _loader = loader;
 105   _protection_domain = protection_domain;
 106   _is_shared = false;
 107   _super = NULL;
 108   _java_mirror = NULL;
 109   _field_cache = NULL;
 110 }
 111 
 112 
 113 
 114 // ------------------------------------------------------------------
 115 // ciInstanceKlass::compute_shared_is_initialized
 116 void ciInstanceKlass::compute_shared_init_state() {
 117   GUARDED_VM_ENTRY(
 118     InstanceKlass* ik = get_instanceKlass();
 119     _init_state = ik->init_state();
 120   )
 121 }
 122 
 123 // ------------------------------------------------------------------
 124 // ciInstanceKlass::compute_shared_has_subklass
 125 bool ciInstanceKlass::compute_shared_has_subklass() {
 126   GUARDED_VM_ENTRY(
 127     InstanceKlass* ik = get_instanceKlass();
 128     _has_subklass = ik->subklass() != NULL;
 129     return _has_subklass;
 130   )
 131 }
 132 
 133 // ------------------------------------------------------------------
 134 // ciInstanceKlass::loader
 135 oop ciInstanceKlass::loader() {
 136   ASSERT_IN_VM;
 137   return JNIHandles::resolve(_loader);
 138 }
 139 
 140 // ------------------------------------------------------------------
 141 // ciInstanceKlass::loader_handle
 142 jobject ciInstanceKlass::loader_handle() {
 143   return _loader;
 144 }
 145 
 146 // ------------------------------------------------------------------
 147 // ciInstanceKlass::protection_domain
 148 oop ciInstanceKlass::protection_domain() {
 149   ASSERT_IN_VM;
 150   return JNIHandles::resolve(_protection_domain);
 151 }
 152 
 153 // ------------------------------------------------------------------
 154 // ciInstanceKlass::protection_domain_handle
 155 jobject ciInstanceKlass::protection_domain_handle() {
 156   return _protection_domain;
 157 }
 158 
 159 // ------------------------------------------------------------------
 160 // ciInstanceKlass::field_cache
 161 //
 162 // Get the field cache associated with this klass.
 163 ciConstantPoolCache* ciInstanceKlass::field_cache() {
 164   if (is_shared()) {
 165     return NULL;
 166   }
 167   if (_field_cache == NULL) {
 168     assert(!is_java_lang_Object(), "Object has no fields");
 169     Arena* arena = CURRENT_ENV->arena();
 170     _field_cache = new (arena) ciConstantPoolCache(arena, 5);
 171   }
 172   return _field_cache;
 173 }
 174 
 175 // ------------------------------------------------------------------
 176 // ciInstanceKlass::get_canonical_holder
 177 //
 178 ciInstanceKlass* ciInstanceKlass::get_canonical_holder(int offset) {
 179   #ifdef ASSERT
 180   if (!(offset >= 0 && offset < layout_helper())) {
 181     tty->print("*** get_canonical_holder(%d) on ", offset);
 182     this->print();
 183     tty->print_cr(" ***");
 184   };
 185   assert(offset >= 0 && offset < layout_helper(), "offset must be tame");
 186   #endif
 187 
 188   if (offset < instanceOopDesc::base_offset_in_bytes()) {
 189     // All header offsets belong properly to java/lang/Object.
 190     return CURRENT_ENV->Object_klass();
 191   }
 192 
 193   ciInstanceKlass* self = this;
 194   for (;;) {
 195     assert(self->is_loaded(), "must be loaded to have size");
 196     ciInstanceKlass* super = self->super();
 197     if (super == NULL || super->nof_nonstatic_fields() == 0 ||
 198         !super->contains_field_offset(offset)) {
 199       return self;
 200     } else {
 201       self = super;  // return super->get_canonical_holder(offset)
 202     }
 203   }
 204 }
 205 
 206 // ------------------------------------------------------------------
 207 // ciInstanceKlass::is_java_lang_Object
 208 //
 209 // Is this klass java.lang.Object?
 210 bool ciInstanceKlass::is_java_lang_Object() const {
 211   return equals(CURRENT_ENV->Object_klass());
 212 }
 213 
 214 // ------------------------------------------------------------------
 215 // ciInstanceKlass::uses_default_loader
 216 bool ciInstanceKlass::uses_default_loader() const {
 217   // Note:  We do not need to resolve the handle or enter the VM
 218   // in order to test null-ness.
 219   return _loader == NULL;
 220 }
 221 
 222 // ------------------------------------------------------------------
 223 
 224 /**
 225  * Return basic type of boxed value for box klass or T_OBJECT if not.
 226  */
 227 BasicType ciInstanceKlass::box_klass_type() const {
 228   if (uses_default_loader() && is_loaded()) {
 229     return SystemDictionary::box_klass_type(get_Klass());
 230   } else {
 231     return T_OBJECT;
 232   }
 233 }
 234 
 235 /**
 236  * Is this boxing klass?
 237  */
 238 bool ciInstanceKlass::is_box_klass() const {
 239   return is_java_primitive(box_klass_type());
 240 }
 241 
 242 /**
 243  *  Is this boxed value offset?
 244  */
 245 bool ciInstanceKlass::is_boxed_value_offset(int offset) const {
 246   BasicType bt = box_klass_type();
 247   return is_java_primitive(bt) &&
 248          (offset == java_lang_boxing_object::value_offset_in_bytes(bt));
 249 }
 250 
 251 // ------------------------------------------------------------------
 252 // ciInstanceKlass::is_in_package
 253 //
 254 // Is this klass in the given package?
 255 bool ciInstanceKlass::is_in_package(const char* packagename, int len) {
 256   // To avoid class loader mischief, this test always rejects application classes.
 257   if (!uses_default_loader())
 258     return false;
 259   GUARDED_VM_ENTRY(
 260     return is_in_package_impl(packagename, len);
 261   )
 262 }
 263 
 264 bool ciInstanceKlass::is_in_package_impl(const char* packagename, int len) {
 265   ASSERT_IN_VM;
 266 
 267   // If packagename contains trailing '/' exclude it from the
 268   // prefix-test since we test for it explicitly.
 269   if (packagename[len - 1] == '/')
 270     len--;
 271 
 272   if (!name()->starts_with(packagename, len))
 273     return false;
 274 
 275   // Test if the class name is something like "java/lang".
 276   if ((len + 1) > name()->utf8_length())
 277     return false;
 278 
 279   // Test for trailing '/'
 280   if ((char) name()->byte_at(len) != '/')
 281     return false;
 282 
 283   // Make sure it's not actually in a subpackage:
 284   if (name()->index_of_at(len+1, "/", 1) >= 0)
 285     return false;
 286 
 287   return true;
 288 }
 289 
 290 // ------------------------------------------------------------------
 291 // ciInstanceKlass::print_impl
 292 //
 293 // Implementation of the print method.
 294 void ciInstanceKlass::print_impl(outputStream* st) {
 295   ciKlass::print_impl(st);
 296   GUARDED_VM_ENTRY(st->print(" loader=" INTPTR_FORMAT, p2i((address)loader()));)
 297   if (is_loaded()) {
 298     st->print(" loaded=true initialized=%s finalized=%s subklass=%s size=%d flags=",
 299               bool_to_str(is_initialized()),
 300               bool_to_str(has_finalizer()),
 301               bool_to_str(has_subklass()),
 302               layout_helper());
 303 
 304     _flags.print_klass_flags();
 305 
 306     if (_super) {
 307       st->print(" super=");
 308       _super->print_name();
 309     }
 310     if (_java_mirror) {
 311       st->print(" mirror=PRESENT");
 312     }
 313   } else {
 314     st->print(" loaded=false");
 315   }
 316 }
 317 
 318 // ------------------------------------------------------------------
 319 // ciInstanceKlass::super
 320 //
 321 // Get the superklass of this klass.
 322 ciInstanceKlass* ciInstanceKlass::super() {
 323   assert(is_loaded(), "must be loaded");
 324   if (_super == NULL && !is_java_lang_Object()) {
 325     GUARDED_VM_ENTRY(
 326       Klass* super_klass = get_instanceKlass()->super();
 327       _super = CURRENT_ENV->get_instance_klass(super_klass);
 328     )
 329   }
 330   return _super;
 331 }
 332 
 333 // ------------------------------------------------------------------
 334 // ciInstanceKlass::java_mirror
 335 //
 336 // Get the instance of java.lang.Class corresponding to this klass.
 337 // Cache it on this->_java_mirror.
 338 ciInstance* ciInstanceKlass::java_mirror() {
 339   if (is_shared()) {
 340     return ciKlass::java_mirror();
 341   }
 342   if (_java_mirror == NULL) {
 343     _java_mirror = ciKlass::java_mirror();
 344   }
 345   return _java_mirror;
 346 }
 347 
 348 // ------------------------------------------------------------------
 349 // ciInstanceKlass::unique_concrete_subklass
 350 ciInstanceKlass* ciInstanceKlass::unique_concrete_subklass() {
 351   if (!is_loaded())     return NULL; // No change if class is not loaded
 352   if (!is_abstract())   return NULL; // Only applies to abstract classes.
 353   if (!has_subklass())  return NULL; // Must have at least one subklass.
 354   VM_ENTRY_MARK;
 355   InstanceKlass* ik = get_instanceKlass();
 356   Klass* up = ik->up_cast_abstract();
 357   assert(up->oop_is_instance(), "must be InstanceKlass");
 358   if (ik == up) {
 359     return NULL;
 360   }
 361   return CURRENT_THREAD_ENV->get_instance_klass(up);
 362 }
 363 
 364 // ------------------------------------------------------------------
 365 // ciInstanceKlass::has_finalizable_subclass
 366 bool ciInstanceKlass::has_finalizable_subclass() {
 367   if (!is_loaded())     return true;
 368   VM_ENTRY_MARK;
 369   return Dependencies::find_finalizable_subclass(get_instanceKlass()) != NULL;
 370 }
 371 
 372 // ------------------------------------------------------------------
 373 // ciInstanceKlass::get_field_by_offset
 374 ciField* ciInstanceKlass::get_field_by_offset(int field_offset, bool is_static) {
 375   if (!is_static) {
 376     for (int i = 0, len = nof_nonstatic_fields(); i < len; i++) {
 377       ciField* field = _nonstatic_fields->at(i);
 378       int  field_off = field->offset_in_bytes();
 379       if (field_off == field_offset)
 380         return field;
 381       if (field_off > field_offset)
 382         break;
 383       // could do binary search or check bins, but probably not worth it
 384     }
 385     return NULL;
 386   }
 387   VM_ENTRY_MARK;
 388   InstanceKlass* k = get_instanceKlass();
 389   fieldDescriptor fd;
 390   if (!k->find_field_from_offset(field_offset, is_static, &fd)) {
 391     return NULL;
 392   }
 393   ciField* field = new (CURRENT_THREAD_ENV->arena()) ciField(&fd);
 394   return field;
 395 }
 396 
 397 // ------------------------------------------------------------------
 398 // ciInstanceKlass::get_field_by_name
 399 ciField* ciInstanceKlass::get_field_by_name(ciSymbol* name, ciSymbol* signature, bool is_static) {
 400   VM_ENTRY_MARK;
 401   InstanceKlass* k = get_instanceKlass();
 402   fieldDescriptor fd;
 403   Klass* def = k->find_field(name->get_symbol(), signature->get_symbol(), is_static, &fd);
 404   if (def == NULL) {
 405     return NULL;
 406   }
 407   ciField* field = new (CURRENT_THREAD_ENV->arena()) ciField(&fd);
 408   return field;
 409 }
 410 
 411 
 412 static int sort_field_by_offset(ciField** a, ciField** b) {
 413   return (*a)->offset_in_bytes() - (*b)->offset_in_bytes();
 414   // (no worries about 32-bit overflow...)
 415 }
 416 
 417 // ------------------------------------------------------------------
 418 // ciInstanceKlass::compute_nonstatic_fields
 419 int ciInstanceKlass::compute_nonstatic_fields() {
 420   assert(is_loaded(), "must be loaded");
 421 
 422   if (_nonstatic_fields != NULL)
 423     return _nonstatic_fields->length();
 424 
 425   if (!has_nonstatic_fields()) {
 426     Arena* arena = CURRENT_ENV->arena();
 427     _nonstatic_fields = new (arena) GrowableArray<ciField*>(arena, 0, 0, NULL);
 428     return 0;
 429   }
 430   assert(!is_java_lang_Object(), "bootstrap OK");
 431 
 432   // Size in bytes of my fields, including inherited fields.
 433   int fsize = nonstatic_field_size() * heapOopSize;
 434 
 435   ciInstanceKlass* super = this->super();
 436   GrowableArray<ciField*>* super_fields = NULL;
 437   if (super != NULL && super->has_nonstatic_fields()) {
 438     int super_fsize  = super->nonstatic_field_size() * heapOopSize;
 439     int super_flen   = super->nof_nonstatic_fields();
 440     super_fields = super->_nonstatic_fields;
 441     assert(super_flen == 0 || super_fields != NULL, "first get nof_fields");
 442     // See if I am no larger than my super; if so, I can use his fields.
 443     if (fsize == super_fsize) {
 444       _nonstatic_fields = super_fields;
 445       return super_fields->length();
 446     }
 447   }
 448 
 449   GrowableArray<ciField*>* fields = NULL;
 450   GUARDED_VM_ENTRY({
 451       fields = compute_nonstatic_fields_impl(super_fields);
 452     });
 453 
 454   if (fields == NULL) {
 455     // This can happen if this class (java.lang.Class) has invisible fields.
 456     if (super_fields != NULL) {
 457       _nonstatic_fields = super_fields;
 458       return super_fields->length();
 459     } else {
 460       return 0;
 461     }
 462   }
 463 
 464   int flen = fields->length();
 465 
 466   // Now sort them by offset, ascending.
 467   // (In principle, they could mix with superclass fields.)
 468   fields->sort(sort_field_by_offset);
 469   _nonstatic_fields = fields;
 470   return flen;
 471 }
 472 
 473 GrowableArray<ciField*>*
 474 ciInstanceKlass::compute_nonstatic_fields_impl(GrowableArray<ciField*>*
 475                                                super_fields) {
 476   ASSERT_IN_VM;
 477   Arena* arena = CURRENT_ENV->arena();
 478   int flen = 0;
 479   GrowableArray<ciField*>* fields = NULL;
 480   InstanceKlass* k = get_instanceKlass();
 481   for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
 482     if (fs.access_flags().is_static())  continue;
 483     flen += 1;
 484   }
 485 
 486   // allocate the array:
 487   if (flen == 0) {
 488     return NULL;  // return nothing if none are locally declared
 489   }
 490   if (super_fields != NULL) {
 491     flen += super_fields->length();
 492   }
 493   fields = new (arena) GrowableArray<ciField*>(arena, flen, 0, NULL);
 494   if (super_fields != NULL) {
 495     fields->appendAll(super_fields);
 496   }
 497 
 498   for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
 499     if (fs.access_flags().is_static())  continue;
 500     fieldDescriptor& fd = fs.field_descriptor();
 501     ciField* field = new (arena) ciField(&fd);
 502     fields->append(field);
 503   }
 504   assert(fields->length() == flen, "sanity");
 505   return fields;
 506 }
 507 
 508 bool ciInstanceKlass::compute_injected_fields_helper() {
 509   ASSERT_IN_VM;
 510   InstanceKlass* k = get_instanceKlass();
 511 
 512   for (InternalFieldStream fs(k); !fs.done(); fs.next()) {
 513     if (fs.access_flags().is_static())  continue;
 514     return true;
 515   }
 516   return false;
 517 }
 518 
 519 void ciInstanceKlass::compute_injected_fields() {
 520   assert(is_loaded(), "must be loaded");
 521 
 522   int has_injected_fields = 0;
 523   if (super() != NULL && super()->has_injected_fields()) {
 524     has_injected_fields = 1;
 525   } else {
 526     GUARDED_VM_ENTRY({
 527         has_injected_fields = compute_injected_fields_helper() ? 1 : 0;
 528       });
 529   }
 530   // may be concurrently initialized for shared ciInstanceKlass objects
 531   assert(_has_injected_fields == -1 || _has_injected_fields == has_injected_fields, "broken concurrent initialization");
 532   _has_injected_fields = has_injected_fields;
 533 }
 534 
 535 // ------------------------------------------------------------------
 536 // ciInstanceKlass::find_method
 537 //
 538 // Find a method in this klass.
 539 ciMethod* ciInstanceKlass::find_method(ciSymbol* name, ciSymbol* signature) {
 540   VM_ENTRY_MARK;
 541   InstanceKlass* k = get_instanceKlass();
 542   Symbol* name_sym = name->get_symbol();
 543   Symbol* sig_sym= signature->get_symbol();
 544 
 545   Method* m = k->find_method(name_sym, sig_sym);
 546   if (m == NULL)  return NULL;
 547 
 548   return CURRENT_THREAD_ENV->get_method(m);
 549 }
 550 
 551 // ------------------------------------------------------------------
 552 // ciInstanceKlass::is_leaf_type
 553 bool ciInstanceKlass::is_leaf_type() {
 554   assert(is_loaded(), "must be loaded");
 555   if (is_shared()) {
 556     return is_final();  // approximately correct
 557   } else {
 558     return !_has_subklass && (nof_implementors() == 0);
 559   }
 560 }
 561 
 562 // ------------------------------------------------------------------
 563 // ciInstanceKlass::implementor
 564 //
 565 // Report an implementor of this interface.
 566 // Note that there are various races here, since my copy
 567 // of _nof_implementors might be out of date with respect
 568 // to results returned by InstanceKlass::implementor.
 569 // This is OK, since any dependencies we decide to assert
 570 // will be checked later under the Compile_lock.
 571 ciInstanceKlass* ciInstanceKlass::implementor() {
 572   ciInstanceKlass* impl = _implementor;
 573   if (impl == NULL) {
 574     // Go into the VM to fetch the implementor.
 575     {
 576       VM_ENTRY_MARK;
 577       Klass* k = get_instanceKlass()->implementor();
 578       if (k != NULL) {
 579         if (k == get_instanceKlass()) {
 580           // More than one implementors. Use 'this' in this case.
 581           impl = this;
 582         } else {
 583           impl = CURRENT_THREAD_ENV->get_instance_klass(k);
 584         }
 585       }
 586     }
 587     // Memoize this result.
 588     if (!is_shared()) {
 589       _implementor = impl;
 590     }
 591   }
 592   return impl;
 593 }
 594 
 595 // Utility class for printing of the contents of the static fields for
 596 // use by compilation replay.  It only prints out the information that
 597 // could be consumed by the compiler, so for primitive types it prints
 598 // out the actual value.  For Strings it's the actual string value.
 599 // For array types it it's first level array size since that's the
 600 // only value which statically unchangeable.  For all other reference
 601 // types it simply prints out the dynamic type.
 602 
 603 class StaticFinalFieldPrinter : public FieldClosure {
 604   outputStream* _out;
 605   const char*   _holder;
 606  public:
 607   StaticFinalFieldPrinter(outputStream* out, const char* holder) :
 608     _out(out),
 609     _holder(holder) {
 610   }
 611   void do_field(fieldDescriptor* fd) {
 612     if (fd->is_final() && !fd->has_initial_value()) {
 613       ResourceMark rm;
 614       oop mirror = fd->field_holder()->java_mirror();
 615       _out->print("staticfield %s %s %s ", _holder, fd->name()->as_quoted_ascii(), fd->signature()->as_quoted_ascii());
 616       switch (fd->field_type()) {
 617         case T_BYTE:    _out->print_cr("%d", mirror->byte_field(fd->offset()));   break;
 618         case T_BOOLEAN: _out->print_cr("%d", mirror->bool_field(fd->offset()));   break;
 619         case T_SHORT:   _out->print_cr("%d", mirror->short_field(fd->offset()));  break;
 620         case T_CHAR:    _out->print_cr("%d", mirror->char_field(fd->offset()));   break;
 621         case T_INT:     _out->print_cr("%d", mirror->int_field(fd->offset()));    break;
 622         case T_LONG:    _out->print_cr(INT64_FORMAT, (int64_t)(mirror->long_field(fd->offset())));   break;
 623         case T_FLOAT: {
 624           float f = mirror->float_field(fd->offset());
 625           _out->print_cr("%d", *(int*)&f);
 626           break;
 627         }
 628         case T_DOUBLE: {
 629           double d = mirror->double_field(fd->offset());
 630           _out->print_cr(INT64_FORMAT, *(int64_t*)&d);
 631           break;
 632         }
 633         case T_ARRAY: {
 634           oop value =  mirror->obj_field_acquire(fd->offset());
 635           if (value == NULL) {
 636             _out->print_cr("null");
 637           } else {
 638             typeArrayOop ta = (typeArrayOop)value;
 639             _out->print("%d", ta->length());
 640             if (value->is_objArray()) {
 641               objArrayOop oa = (objArrayOop)value;
 642               const char* klass_name  = value->klass()->name()->as_quoted_ascii();
 643               _out->print(" %s", klass_name);
 644             }
 645             _out->cr();
 646           }
 647           break;
 648         }
 649         case T_OBJECT: {
 650           oop value =  mirror->obj_field_acquire(fd->offset());
 651           if (value == NULL) {
 652             _out->print_cr("null");
 653           } else if (value->is_instance()) {
 654             if (value->is_a(SystemDictionary::String_klass())) {
 655               _out->print("\"");
 656               _out->print_raw(java_lang_String::as_quoted_ascii(value));
 657               _out->print_cr("\"");
 658             } else {
 659               const char* klass_name  = value->klass()->name()->as_quoted_ascii();
 660               _out->print_cr("%s", klass_name);
 661             }
 662           } else {
 663             ShouldNotReachHere();
 664           }
 665           break;
 666         }
 667         default:
 668           ShouldNotReachHere();
 669         }
 670     }
 671   }
 672 };
 673 
 674 
 675 void ciInstanceKlass::dump_replay_data(outputStream* out) {
 676   ResourceMark rm;
 677 
 678   InstanceKlass* ik = get_instanceKlass();
 679   ConstantPool*  cp = ik->constants();
 680 
 681   // Try to record related loaded classes
 682   Klass* sub = ik->subklass();
 683   while (sub != NULL) {
 684     if (sub->oop_is_instance()) {
 685       out->print_cr("instanceKlass %s", sub->name()->as_quoted_ascii());
 686     }
 687     sub = sub->next_sibling();
 688   }
 689 
 690   // Dump out the state of the constant pool tags.  During replay the
 691   // tags will be validated for things which shouldn't change and
 692   // classes will be resolved if the tags indicate that they were
 693   // resolved at compile time.
 694   out->print("ciInstanceKlass %s %d %d %d", ik->name()->as_quoted_ascii(),
 695              is_linked(), is_initialized(), cp->length());
 696   for (int index = 1; index < cp->length(); index++) {
 697     out->print(" %d", cp->tags()->at(index));
 698   }
 699   out->cr();
 700   if (is_initialized()) {
 701     //  Dump out the static final fields in case the compilation relies
 702     //  on their value for correct replay.
 703     StaticFinalFieldPrinter sffp(out, ik->name()->as_quoted_ascii());
 704     ik->do_local_static_fields(&sffp);
 705   }
 706 }