1 /*
   2  * Copyright (c) 1999, 2015, 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()->is_instance_klass(), "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   _is_anonymous = ik->is_anonymous();
  62   _nonstatic_fields = NULL; // initialized lazily by compute_nonstatic_fields:
  63   _has_injected_fields = -1;
  64   _implementor = NULL; // we will fill these lazily
  65 
  66   Thread *thread = Thread::current();
  67   if (ciObjectFactory::is_initialized()) {
  68     _loader = JNIHandles::make_local(thread, ik->class_loader());
  69     _protection_domain = JNIHandles::make_local(thread,
  70                                                 ik->protection_domain());
  71     _is_shared = false;
  72   } else {
  73     Handle h_loader(thread, ik->class_loader());
  74     Handle h_protection_domain(thread, ik->protection_domain());
  75     _loader = JNIHandles::make_global(h_loader);
  76     _protection_domain = JNIHandles::make_global(h_protection_domain);
  77     _is_shared = true;
  78   }
  79 
  80   // Lazy fields get filled in only upon request.
  81   _super  = NULL;
  82   _java_mirror = NULL;
  83 
  84   if (is_shared()) {
  85     if (h_k() != SystemDictionary::Object_klass()) {
  86       super();
  87     }
  88     //compute_nonstatic_fields();  // done outside of constructor
  89   }
  90 
  91   _field_cache = NULL;
  92 }
  93 
  94 // Version for unloaded classes:
  95 ciInstanceKlass::ciInstanceKlass(ciSymbol* name,
  96                                  jobject loader, jobject protection_domain)
  97   : ciKlass(name, T_OBJECT)
  98 {
  99   assert(name->byte_at(0) != '[', "not an instance klass");
 100   _init_state = (InstanceKlass::ClassState)0;
 101   _nonstatic_field_size = -1;
 102   _has_nonstatic_fields = false;
 103   _nonstatic_fields = NULL;
 104   _has_injected_fields = -1;
 105   _is_anonymous = false;
 106   _loader = loader;
 107   _protection_domain = protection_domain;
 108   _is_shared = false;
 109   _super = NULL;
 110   _java_mirror = NULL;
 111   _field_cache = NULL;
 112 }
 113 
 114 
 115 
 116 // ------------------------------------------------------------------
 117 // ciInstanceKlass::compute_shared_is_initialized
 118 void ciInstanceKlass::compute_shared_init_state() {
 119   GUARDED_VM_ENTRY(
 120     InstanceKlass* ik = get_instanceKlass();
 121     _init_state = ik->init_state();
 122   )
 123 }
 124 
 125 // ------------------------------------------------------------------
 126 // ciInstanceKlass::compute_shared_has_subklass
 127 bool ciInstanceKlass::compute_shared_has_subklass() {
 128   GUARDED_VM_ENTRY(
 129     InstanceKlass* ik = get_instanceKlass();
 130     _has_subklass = ik->subklass() != NULL;
 131     return _has_subklass;
 132   )
 133 }
 134 
 135 // ------------------------------------------------------------------
 136 // ciInstanceKlass::loader
 137 oop ciInstanceKlass::loader() {
 138   ASSERT_IN_VM;
 139   return JNIHandles::resolve(_loader);
 140 }
 141 
 142 // ------------------------------------------------------------------
 143 // ciInstanceKlass::loader_handle
 144 jobject ciInstanceKlass::loader_handle() {
 145   return _loader;
 146 }
 147 
 148 // ------------------------------------------------------------------
 149 // ciInstanceKlass::protection_domain
 150 oop ciInstanceKlass::protection_domain() {
 151   ASSERT_IN_VM;
 152   return JNIHandles::resolve(_protection_domain);
 153 }
 154 
 155 // ------------------------------------------------------------------
 156 // ciInstanceKlass::protection_domain_handle
 157 jobject ciInstanceKlass::protection_domain_handle() {
 158   return _protection_domain;
 159 }
 160 
 161 // ------------------------------------------------------------------
 162 // ciInstanceKlass::field_cache
 163 //
 164 // Get the field cache associated with this klass.
 165 ciConstantPoolCache* ciInstanceKlass::field_cache() {
 166   if (is_shared()) {
 167     return NULL;
 168   }
 169   if (_field_cache == NULL) {
 170     assert(!is_java_lang_Object(), "Object has no fields");
 171     Arena* arena = CURRENT_ENV->arena();
 172     _field_cache = new (arena) ciConstantPoolCache(arena, 5);
 173   }
 174   return _field_cache;
 175 }
 176 
 177 // ------------------------------------------------------------------
 178 // ciInstanceKlass::get_canonical_holder
 179 //
 180 ciInstanceKlass* ciInstanceKlass::get_canonical_holder(int offset) {
 181   #ifdef ASSERT
 182   if (!(offset >= 0 && offset < layout_helper())) {
 183     tty->print("*** get_canonical_holder(%d) on ", offset);
 184     this->print();
 185     tty->print_cr(" ***");
 186   };
 187   assert(offset >= 0 && offset < layout_helper(), "offset must be tame");
 188   #endif
 189 
 190   if (offset < instanceOopDesc::base_offset_in_bytes()) {
 191     // All header offsets belong properly to java/lang/Object.
 192     return CURRENT_ENV->Object_klass();
 193   }
 194 
 195   ciInstanceKlass* self = this;
 196   for (;;) {
 197     assert(self->is_loaded(), "must be loaded to have size");
 198     ciInstanceKlass* super = self->super();
 199     if (super == NULL || super->nof_nonstatic_fields() == 0 ||
 200         !super->contains_field_offset(offset)) {
 201       return self;
 202     } else {
 203       self = super;  // return super->get_canonical_holder(offset)
 204     }
 205   }
 206 }
 207 
 208 // ------------------------------------------------------------------
 209 // ciInstanceKlass::is_java_lang_Object
 210 //
 211 // Is this klass java.lang.Object?
 212 bool ciInstanceKlass::is_java_lang_Object() const {
 213   return equals(CURRENT_ENV->Object_klass());
 214 }
 215 
 216 // ------------------------------------------------------------------
 217 // ciInstanceKlass::uses_default_loader
 218 bool ciInstanceKlass::uses_default_loader() const {
 219   // Note:  We do not need to resolve the handle or enter the VM
 220   // in order to test null-ness.
 221   return _loader == NULL;
 222 }
 223 
 224 // ------------------------------------------------------------------
 225 
 226 /**
 227  * Return basic type of boxed value for box klass or T_OBJECT if not.
 228  */
 229 BasicType ciInstanceKlass::box_klass_type() const {
 230   if (uses_default_loader() && is_loaded()) {
 231     return SystemDictionary::box_klass_type(get_Klass());
 232   } else {
 233     return T_OBJECT;
 234   }
 235 }
 236 
 237 /**
 238  * Is this boxing klass?
 239  */
 240 bool ciInstanceKlass::is_box_klass() const {
 241   return is_java_primitive(box_klass_type());
 242 }
 243 
 244 /**
 245  *  Is this boxed value offset?
 246  */
 247 bool ciInstanceKlass::is_boxed_value_offset(int offset) const {
 248   BasicType bt = box_klass_type();
 249   return is_java_primitive(bt) &&
 250          (offset == java_lang_boxing_object::value_offset_in_bytes(bt));
 251 }
 252 
 253 // ------------------------------------------------------------------
 254 // ciInstanceKlass::is_in_package
 255 //
 256 // Is this klass in the given package?
 257 bool ciInstanceKlass::is_in_package(const char* packagename, int len) {
 258   // To avoid class loader mischief, this test always rejects application classes.
 259   if (!uses_default_loader())
 260     return false;
 261   GUARDED_VM_ENTRY(
 262     return is_in_package_impl(packagename, len);
 263   )
 264 }
 265 
 266 bool ciInstanceKlass::is_in_package_impl(const char* packagename, int len) {
 267   ASSERT_IN_VM;
 268 
 269   // If packagename contains trailing '/' exclude it from the
 270   // prefix-test since we test for it explicitly.
 271   if (packagename[len - 1] == '/')
 272     len--;
 273 
 274   if (!name()->starts_with(packagename, len))
 275     return false;
 276 
 277   // Test if the class name is something like "java/lang".
 278   if ((len + 1) > name()->utf8_length())
 279     return false;
 280 
 281   // Test for trailing '/'
 282   if ((char) name()->byte_at(len) != '/')
 283     return false;
 284 
 285   // Make sure it's not actually in a subpackage:
 286   if (name()->index_of_at(len+1, "/", 1) >= 0)
 287     return false;
 288 
 289   return true;
 290 }
 291 
 292 // ------------------------------------------------------------------
 293 // ciInstanceKlass::print_impl
 294 //
 295 // Implementation of the print method.
 296 void ciInstanceKlass::print_impl(outputStream* st) {
 297   ciKlass::print_impl(st);
 298   GUARDED_VM_ENTRY(st->print(" loader=" INTPTR_FORMAT, p2i((address)loader()));)
 299   if (is_loaded()) {
 300     st->print(" loaded=true initialized=%s finalized=%s subklass=%s size=%d flags=",
 301               bool_to_str(is_initialized()),
 302               bool_to_str(has_finalizer()),
 303               bool_to_str(has_subklass()),
 304               layout_helper());
 305 
 306     _flags.print_klass_flags();
 307 
 308     if (_super) {
 309       st->print(" super=");
 310       _super->print_name();
 311     }
 312     if (_java_mirror) {
 313       st->print(" mirror=PRESENT");
 314     }
 315   } else {
 316     st->print(" loaded=false");
 317   }
 318 }
 319 
 320 // ------------------------------------------------------------------
 321 // ciInstanceKlass::super
 322 //
 323 // Get the superklass of this klass.
 324 ciInstanceKlass* ciInstanceKlass::super() {
 325   assert(is_loaded(), "must be loaded");
 326   if (_super == NULL && !is_java_lang_Object()) {
 327     GUARDED_VM_ENTRY(
 328       Klass* super_klass = get_instanceKlass()->super();
 329       _super = CURRENT_ENV->get_instance_klass(super_klass);
 330     )
 331   }
 332   return _super;
 333 }
 334 
 335 // ------------------------------------------------------------------
 336 // ciInstanceKlass::java_mirror
 337 //
 338 // Get the instance of java.lang.Class corresponding to this klass.
 339 // Cache it on this->_java_mirror.
 340 ciInstance* ciInstanceKlass::java_mirror() {
 341   if (is_shared()) {
 342     return ciKlass::java_mirror();
 343   }
 344   if (_java_mirror == NULL) {
 345     _java_mirror = ciKlass::java_mirror();
 346   }
 347   return _java_mirror;
 348 }
 349 
 350 // ------------------------------------------------------------------
 351 // ciInstanceKlass::unique_concrete_subklass
 352 ciInstanceKlass* ciInstanceKlass::unique_concrete_subklass() {
 353   if (!is_loaded())     return NULL; // No change if class is not loaded
 354   if (!is_abstract())   return NULL; // Only applies to abstract classes.
 355   if (!has_subklass())  return NULL; // Must have at least one subklass.
 356   VM_ENTRY_MARK;
 357   InstanceKlass* ik = get_instanceKlass();
 358   Klass* up = ik->up_cast_abstract();
 359   assert(up->is_instance_klass(), "must be InstanceKlass");
 360   if (ik == up) {
 361     return NULL;
 362   }
 363   return CURRENT_THREAD_ENV->get_instance_klass(up);
 364 }
 365 
 366 // ------------------------------------------------------------------
 367 // ciInstanceKlass::has_finalizable_subclass
 368 bool ciInstanceKlass::has_finalizable_subclass() {
 369   if (!is_loaded())     return true;
 370   VM_ENTRY_MARK;
 371   return Dependencies::find_finalizable_subclass(get_instanceKlass()) != NULL;
 372 }
 373 
 374 // ------------------------------------------------------------------
 375 // ciInstanceKlass::get_field_by_offset
 376 ciField* ciInstanceKlass::get_field_by_offset(int field_offset, bool is_static) {
 377   if (!is_static) {
 378     for (int i = 0, len = nof_nonstatic_fields(); i < len; i++) {
 379       ciField* field = _nonstatic_fields->at(i);
 380       int  field_off = field->offset_in_bytes();
 381       if (field_off == field_offset)
 382         return field;
 383       if (field_off > field_offset)
 384         break;
 385       // could do binary search or check bins, but probably not worth it
 386     }
 387     return NULL;
 388   }
 389   VM_ENTRY_MARK;
 390   InstanceKlass* k = get_instanceKlass();
 391   fieldDescriptor fd;
 392   if (!k->find_field_from_offset(field_offset, is_static, &fd)) {
 393     return NULL;
 394   }
 395   ciField* field = new (CURRENT_THREAD_ENV->arena()) ciField(&fd);
 396   return field;
 397 }
 398 
 399 // ------------------------------------------------------------------
 400 // ciInstanceKlass::get_field_by_name
 401 ciField* ciInstanceKlass::get_field_by_name(ciSymbol* name, ciSymbol* signature, bool is_static) {
 402   VM_ENTRY_MARK;
 403   InstanceKlass* k = get_instanceKlass();
 404   fieldDescriptor fd;
 405   Klass* def = k->find_field(name->get_symbol(), signature->get_symbol(), is_static, &fd);
 406   if (def == NULL) {
 407     return NULL;
 408   }
 409   ciField* field = new (CURRENT_THREAD_ENV->arena()) ciField(&fd);
 410   return field;
 411 }
 412 
 413 
 414 static int sort_field_by_offset(ciField** a, ciField** b) {
 415   return (*a)->offset_in_bytes() - (*b)->offset_in_bytes();
 416   // (no worries about 32-bit overflow...)
 417 }
 418 
 419 // ------------------------------------------------------------------
 420 // ciInstanceKlass::compute_nonstatic_fields
 421 int ciInstanceKlass::compute_nonstatic_fields() {
 422   assert(is_loaded(), "must be loaded");
 423 
 424   if (_nonstatic_fields != NULL)
 425     return _nonstatic_fields->length();
 426 
 427   if (!has_nonstatic_fields()) {
 428     Arena* arena = CURRENT_ENV->arena();
 429     _nonstatic_fields = new (arena) GrowableArray<ciField*>(arena, 0, 0, NULL);
 430     return 0;
 431   }
 432   assert(!is_java_lang_Object(), "bootstrap OK");
 433 
 434   // Size in bytes of my fields, including inherited fields.
 435   int fsize = nonstatic_field_size() * heapOopSize;
 436 
 437   ciInstanceKlass* super = this->super();
 438   GrowableArray<ciField*>* super_fields = NULL;
 439   if (super != NULL && super->has_nonstatic_fields()) {
 440     int super_fsize  = super->nonstatic_field_size() * heapOopSize;
 441     int super_flen   = super->nof_nonstatic_fields();
 442     super_fields = super->_nonstatic_fields;
 443     assert(super_flen == 0 || super_fields != NULL, "first get nof_fields");
 444     // See if I am no larger than my super; if so, I can use his fields.
 445     if (fsize == super_fsize) {
 446       _nonstatic_fields = super_fields;
 447       return super_fields->length();
 448     }
 449   }
 450 
 451   GrowableArray<ciField*>* fields = NULL;
 452   GUARDED_VM_ENTRY({
 453       fields = compute_nonstatic_fields_impl(super_fields);
 454     });
 455 
 456   if (fields == NULL) {
 457     // This can happen if this class (java.lang.Class) has invisible fields.
 458     if (super_fields != NULL) {
 459       _nonstatic_fields = super_fields;
 460       return super_fields->length();
 461     } else {
 462       return 0;
 463     }
 464   }
 465 
 466   int flen = fields->length();
 467 
 468   // Now sort them by offset, ascending.
 469   // (In principle, they could mix with superclass fields.)
 470   fields->sort(sort_field_by_offset);
 471   _nonstatic_fields = fields;
 472   return flen;
 473 }
 474 
 475 GrowableArray<ciField*>*
 476 ciInstanceKlass::compute_nonstatic_fields_impl(GrowableArray<ciField*>*
 477                                                super_fields) {
 478   ASSERT_IN_VM;
 479   Arena* arena = CURRENT_ENV->arena();
 480   int flen = 0;
 481   GrowableArray<ciField*>* fields = NULL;
 482   InstanceKlass* k = get_instanceKlass();
 483   for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
 484     if (fs.access_flags().is_static())  continue;
 485     flen += 1;
 486   }
 487 
 488   // allocate the array:
 489   if (flen == 0) {
 490     return NULL;  // return nothing if none are locally declared
 491   }
 492   if (super_fields != NULL) {
 493     flen += super_fields->length();
 494   }
 495   fields = new (arena) GrowableArray<ciField*>(arena, flen, 0, NULL);
 496   if (super_fields != NULL) {
 497     fields->appendAll(super_fields);
 498   }
 499 
 500   for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
 501     if (fs.access_flags().is_static())  continue;
 502     fieldDescriptor& fd = fs.field_descriptor();
 503     ciField* field = new (arena) ciField(&fd);
 504     fields->append(field);
 505   }
 506   assert(fields->length() == flen, "sanity");
 507   return fields;
 508 }
 509 
 510 bool ciInstanceKlass::compute_injected_fields_helper() {
 511   ASSERT_IN_VM;
 512   InstanceKlass* k = get_instanceKlass();
 513 
 514   for (InternalFieldStream fs(k); !fs.done(); fs.next()) {
 515     if (fs.access_flags().is_static())  continue;
 516     return true;
 517   }
 518   return false;
 519 }
 520 
 521 void ciInstanceKlass::compute_injected_fields() {
 522   assert(is_loaded(), "must be loaded");
 523 
 524   int has_injected_fields = 0;
 525   if (super() != NULL && super()->has_injected_fields()) {
 526     has_injected_fields = 1;
 527   } else {
 528     GUARDED_VM_ENTRY({
 529         has_injected_fields = compute_injected_fields_helper() ? 1 : 0;
 530       });
 531   }
 532   // may be concurrently initialized for shared ciInstanceKlass objects
 533   assert(_has_injected_fields == -1 || _has_injected_fields == has_injected_fields, "broken concurrent initialization");
 534   _has_injected_fields = has_injected_fields;
 535 }
 536 
 537 // ------------------------------------------------------------------
 538 // ciInstanceKlass::find_method
 539 //
 540 // Find a method in this klass.
 541 ciMethod* ciInstanceKlass::find_method(ciSymbol* name, ciSymbol* signature) {
 542   VM_ENTRY_MARK;
 543   InstanceKlass* k = get_instanceKlass();
 544   Symbol* name_sym = name->get_symbol();
 545   Symbol* sig_sym= signature->get_symbol();
 546 
 547   Method* m = k->find_method(name_sym, sig_sym);
 548   if (m == NULL)  return NULL;
 549 
 550   return CURRENT_THREAD_ENV->get_method(m);
 551 }
 552 
 553 // ------------------------------------------------------------------
 554 // ciInstanceKlass::is_leaf_type
 555 bool ciInstanceKlass::is_leaf_type() {
 556   assert(is_loaded(), "must be loaded");
 557   if (is_shared()) {
 558     return is_final();  // approximately correct
 559   } else {
 560     return !_has_subklass && (nof_implementors() == 0);
 561   }
 562 }
 563 
 564 // ------------------------------------------------------------------
 565 // ciInstanceKlass::implementor
 566 //
 567 // Report an implementor of this interface.
 568 // Note that there are various races here, since my copy
 569 // of _nof_implementors might be out of date with respect
 570 // to results returned by InstanceKlass::implementor.
 571 // This is OK, since any dependencies we decide to assert
 572 // will be checked later under the Compile_lock.
 573 ciInstanceKlass* ciInstanceKlass::implementor() {
 574   ciInstanceKlass* impl = _implementor;
 575   if (impl == NULL) {
 576     // Go into the VM to fetch the implementor.
 577     {
 578       VM_ENTRY_MARK;
 579       Klass* k = get_instanceKlass()->implementor();
 580       if (k != NULL) {
 581         if (k == get_instanceKlass()) {
 582           // More than one implementors. Use 'this' in this case.
 583           impl = this;
 584         } else {
 585           impl = CURRENT_THREAD_ENV->get_instance_klass(k);
 586         }
 587       }
 588     }
 589     // Memoize this result.
 590     if (!is_shared()) {
 591       _implementor = impl;
 592     }
 593   }
 594   return impl;
 595 }
 596 
 597 // Utility class for printing of the contents of the static fields for
 598 // use by compilation replay.  It only prints out the information that
 599 // could be consumed by the compiler, so for primitive types it prints
 600 // out the actual value.  For Strings it's the actual string value.
 601 // For array types it it's first level array size since that's the
 602 // only value which statically unchangeable.  For all other reference
 603 // types it simply prints out the dynamic type.
 604 
 605 class StaticFinalFieldPrinter : public FieldClosure {
 606   outputStream* _out;
 607   const char*   _holder;
 608  public:
 609   StaticFinalFieldPrinter(outputStream* out, const char* holder) :
 610     _out(out),
 611     _holder(holder) {
 612   }
 613   void do_field(fieldDescriptor* fd) {
 614     if (fd->is_final() && !fd->has_initial_value()) {
 615       ResourceMark rm;
 616       oop mirror = fd->field_holder()->java_mirror();
 617       _out->print("staticfield %s %s %s ", _holder, fd->name()->as_quoted_ascii(), fd->signature()->as_quoted_ascii());
 618       switch (fd->field_type()) {
 619         case T_BYTE:    _out->print_cr("%d", mirror->byte_field(fd->offset()));   break;
 620         case T_BOOLEAN: _out->print_cr("%d", mirror->bool_field(fd->offset()));   break;
 621         case T_SHORT:   _out->print_cr("%d", mirror->short_field(fd->offset()));  break;
 622         case T_CHAR:    _out->print_cr("%d", mirror->char_field(fd->offset()));   break;
 623         case T_INT:     _out->print_cr("%d", mirror->int_field(fd->offset()));    break;
 624         case T_LONG:    _out->print_cr(INT64_FORMAT, (int64_t)(mirror->long_field(fd->offset())));   break;
 625         case T_FLOAT: {
 626           float f = mirror->float_field(fd->offset());
 627           _out->print_cr("%d", *(int*)&f);
 628           break;
 629         }
 630         case T_DOUBLE: {
 631           double d = mirror->double_field(fd->offset());
 632           _out->print_cr(INT64_FORMAT, *(int64_t*)&d);
 633           break;
 634         }
 635         case T_ARRAY: {
 636           oop value =  mirror->obj_field_acquire(fd->offset());
 637           if (value == NULL) {
 638             _out->print_cr("null");
 639           } else {
 640             typeArrayOop ta = (typeArrayOop)value;
 641             _out->print("%d", ta->length());
 642             if (value->is_objArray()) {
 643               objArrayOop oa = (objArrayOop)value;
 644               const char* klass_name  = value->klass()->name()->as_quoted_ascii();
 645               _out->print(" %s", klass_name);
 646             }
 647             _out->cr();
 648           }
 649           break;
 650         }
 651         case T_OBJECT: {
 652           oop value =  mirror->obj_field_acquire(fd->offset());
 653           if (value == NULL) {
 654             _out->print_cr("null");
 655           } else if (value->is_instance()) {
 656             if (value->is_a(SystemDictionary::String_klass())) {
 657               _out->print("\"");
 658               _out->print_raw(java_lang_String::as_quoted_ascii(value));
 659               _out->print_cr("\"");
 660             } else {
 661               const char* klass_name  = value->klass()->name()->as_quoted_ascii();
 662               _out->print_cr("%s", klass_name);
 663             }
 664           } else {
 665             ShouldNotReachHere();
 666           }
 667           break;
 668         }
 669         default:
 670           ShouldNotReachHere();
 671         }
 672     }
 673   }
 674 };
 675 
 676 
 677 void ciInstanceKlass::dump_replay_data(outputStream* out) {
 678   ResourceMark rm;
 679 
 680   InstanceKlass* ik = get_instanceKlass();
 681   ConstantPool*  cp = ik->constants();
 682 
 683   // Try to record related loaded classes
 684   Klass* sub = ik->subklass();
 685   while (sub != NULL) {
 686     if (sub->is_instance_klass()) {
 687       out->print_cr("instanceKlass %s", sub->name()->as_quoted_ascii());
 688     }
 689     sub = sub->next_sibling();
 690   }
 691 
 692   // Dump out the state of the constant pool tags.  During replay the
 693   // tags will be validated for things which shouldn't change and
 694   // classes will be resolved if the tags indicate that they were
 695   // resolved at compile time.
 696   out->print("ciInstanceKlass %s %d %d %d", ik->name()->as_quoted_ascii(),
 697              is_linked(), is_initialized(), cp->length());
 698   for (int index = 1; index < cp->length(); index++) {
 699     out->print(" %d", cp->tags()->at(index));
 700   }
 701   out->cr();
 702   if (is_initialized()) {
 703     //  Dump out the static final fields in case the compilation relies
 704     //  on their value for correct replay.
 705     StaticFinalFieldPrinter sffp(out, ik->name()->as_quoted_ascii());
 706     ik->do_local_static_fields(&sffp);
 707   }
 708 }