1 /*
  2  * Copyright (c) 1999, 2025, 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 "ci/ciField.hpp"
 26 #include "ci/ciInstance.hpp"
 27 #include "ci/ciInstanceKlass.hpp"
 28 #include "ci/ciUtilities.inline.hpp"
 29 #include "classfile/javaClasses.hpp"
 30 #include "classfile/vmClasses.hpp"
 31 #include "memory/allocation.hpp"
 32 #include "memory/allocation.inline.hpp"
 33 #include "memory/resourceArea.hpp"
 34 #include "oops/instanceKlass.inline.hpp"
 35 #include "oops/klass.inline.hpp"
 36 #include "oops/oop.inline.hpp"
 37 #include "oops/fieldStreams.inline.hpp"
 38 #include "runtime/fieldDescriptor.inline.hpp"
 39 #include "runtime/handles.inline.hpp"
 40 #include "runtime/jniHandles.inline.hpp"
 41 
 42 // ciInstanceKlass
 43 //
 44 // This class represents a Klass* in the HotSpot virtual machine
 45 // whose Klass part in an InstanceKlass.
 46 
 47 
 48 // ------------------------------------------------------------------
 49 // ciInstanceKlass::ciInstanceKlass
 50 //
 51 // Loaded instance klass.
 52 ciInstanceKlass::ciInstanceKlass(Klass* k) :
 53   ciKlass(k)
 54 {
 55   assert(get_Klass()->is_instance_klass(), "wrong type");
 56   assert(get_instanceKlass()->is_loaded(), "must be at least loaded");
 57   InstanceKlass* ik = get_instanceKlass();
 58 
 59   AccessFlags access_flags = ik->access_flags();
 60   _flags = ciFlags(access_flags);
 61   _has_finalizer = ik->has_finalizer();
 62   _has_subklass = flags().is_final() ? subklass_false : subklass_unknown;
 63   _init_state = ik->init_state();
 64   _has_nonstatic_fields = ik->has_nonstatic_fields();
 65   _has_nonstatic_concrete_methods = ik->has_nonstatic_concrete_methods();
 66   _is_hidden = ik->is_hidden();
 67   _is_record = ik->is_record();
 68   _nonstatic_fields = nullptr; // initialized lazily by compute_nonstatic_fields:
 69   _has_injected_fields = -1;
 70   _implementor = nullptr; // we will fill these lazily
 71   _transitive_interfaces = nullptr;
 72 
 73   // Ensure that the metadata wrapped by the ciMetadata is kept alive by GC.
 74   // This is primarily useful for metadata which is considered as weak roots
 75   // by the GC but need to be strong roots if reachable from a current compilation.
 76   // InstanceKlass are created for both weak and strong metadata.  Ensuring this metadata
 77   // alive covers the cases where there are weak roots without performance cost.
 78   oop holder = ik->klass_holder();
 79   if (ik->class_loader_data()->has_class_mirror_holder()) {
 80     // Though ciInstanceKlass records class loader oop, it's not enough to keep
 81     // non-strong hidden classes alive (loader == nullptr). Klass holder should
 82     // be used instead. It is enough to record a ciObject, since cached elements are never removed
 83     // during ciObjectFactory lifetime. ciObjectFactory itself is created for
 84     // every compilation and lives for the whole duration of the compilation.
 85     assert(holder != nullptr, "holder of hidden class is the mirror which is never null");
 86     (void)CURRENT_ENV->get_object(holder);
 87   }
 88 
 89   JavaThread *thread = JavaThread::current();
 90   if (ciObjectFactory::is_initialized()) {
 91     _loader = JNIHandles::make_local(thread, ik->class_loader());
 92     _is_shared = false;
 93   } else {
 94     Handle h_loader(thread, ik->class_loader());
 95     _loader = JNIHandles::make_global(h_loader);
 96     _is_shared = true;
 97   }
 98 
 99   _has_trusted_loader = compute_has_trusted_loader();
100 
101   // Lazy fields get filled in only upon request.
102   _super  = nullptr;
103   _java_mirror = nullptr;
104 
105   if (is_shared()) {
106     if (k != vmClasses::Object_klass()) {
107       super();
108     }
109     //compute_nonstatic_fields();  // done outside of constructor
110   }
111 
112   _field_cache = nullptr;
113 }
114 
115 // Version for unloaded classes:
116 ciInstanceKlass::ciInstanceKlass(ciSymbol* name,
117                                  jobject loader)
118   : ciKlass(name, T_OBJECT)
119 {
120   assert(name->char_at(0) != JVM_SIGNATURE_ARRAY, "not an instance klass");
121   _init_state = (InstanceKlass::ClassState)0;
122   _has_nonstatic_fields = false;
123   _nonstatic_fields = nullptr;
124   _has_injected_fields = -1;
125   _is_hidden = false;
126   _is_record = false;
127   _loader = loader;
128   _is_shared = false;
129   _super = nullptr;
130   _java_mirror = nullptr;
131   _field_cache = nullptr;
132   _has_trusted_loader = compute_has_trusted_loader();
133 }
134 
135 
136 
137 // ------------------------------------------------------------------
138 // ciInstanceKlass::compute_shared_is_initialized
139 void ciInstanceKlass::compute_shared_init_state() {
140   GUARDED_VM_ENTRY(
141     InstanceKlass* ik = get_instanceKlass();
142     _init_state = ik->init_state();
143   )
144 }
145 
146 // ------------------------------------------------------------------
147 // ciInstanceKlass::compute_shared_has_subklass
148 bool ciInstanceKlass::compute_shared_has_subklass() {
149   GUARDED_VM_ENTRY(
150     InstanceKlass* ik = get_instanceKlass();
151     _has_subklass = ik->subklass() != nullptr ? subklass_true : subklass_false;
152     return _has_subklass == subklass_true;
153   )
154 }
155 
156 // ------------------------------------------------------------------
157 // ciInstanceKlass::loader
158 oop ciInstanceKlass::loader() {
159   ASSERT_IN_VM;
160   return JNIHandles::resolve(_loader);
161 }
162 
163 // ------------------------------------------------------------------
164 // ciInstanceKlass::loader_handle
165 jobject ciInstanceKlass::loader_handle() {
166   return _loader;
167 }
168 
169 // ------------------------------------------------------------------
170 // ciInstanceKlass::field_cache
171 //
172 // Get the field cache associated with this klass.
173 ciConstantPoolCache* ciInstanceKlass::field_cache() {
174   if (is_shared()) {
175     return nullptr;
176   }
177   if (_field_cache == nullptr) {
178     assert(!is_java_lang_Object(), "Object has no fields");
179     Arena* arena = CURRENT_ENV->arena();
180     _field_cache = new (arena) ciConstantPoolCache(arena, 5);
181   }
182   return _field_cache;
183 }
184 
185 // ------------------------------------------------------------------
186 // ciInstanceKlass::get_canonical_holder
187 //
188 ciInstanceKlass* ciInstanceKlass::get_canonical_holder(int offset) {
189   #ifdef ASSERT
190   if (!(offset >= 0 && offset < layout_helper_size_in_bytes())) {
191     tty->print("*** get_canonical_holder(%d) on ", offset);
192     this->print();
193     tty->print_cr(" ***");
194   };
195   assert(offset >= 0 && offset < layout_helper_size_in_bytes(), "offset must be tame");
196   #endif
197 
198   if (offset < instanceOopDesc::base_offset_in_bytes()) {
199     // All header offsets belong properly to java/lang/Object.
200     return CURRENT_ENV->Object_klass();
201   }
202 
203   ciInstanceKlass* self = this;
204   assert(self->is_loaded(), "must be loaded to access field info");
205   ciField* field = self->get_field_by_offset(offset, false);
206   if (field != nullptr) {
207     return field->holder();
208   } else {
209     for (;;) {
210       assert(self->is_loaded(), "must be loaded to have size");
211       ciInstanceKlass* super = self->super();
212       if (super == nullptr ||
213           super->nof_nonstatic_fields() == 0 ||
214           super->layout_helper_size_in_bytes() <= offset) {
215         return self;
216       } else {
217         self = super;  // return super->get_canonical_holder(offset)
218       }
219     }
220   }
221 }
222 
223 // ------------------------------------------------------------------
224 // ciInstanceKlass::is_java_lang_Object
225 //
226 // Is this klass java.lang.Object?
227 bool ciInstanceKlass::is_java_lang_Object() const {
228   return equals(CURRENT_ENV->Object_klass());
229 }
230 
231 // ------------------------------------------------------------------
232 // ciInstanceKlass::uses_default_loader
233 bool ciInstanceKlass::uses_default_loader() const {
234   // Note:  We do not need to resolve the handle or enter the VM
235   // in order to test null-ness.
236   return _loader == nullptr;
237 }
238 
239 // ------------------------------------------------------------------
240 
241 /**
242  * Return basic type of boxed value for box klass or T_OBJECT if not.
243  */
244 BasicType ciInstanceKlass::box_klass_type() const {
245   if (uses_default_loader() && is_loaded()) {
246     return vmClasses::box_klass_type(get_Klass());
247   } else {
248     return T_OBJECT;
249   }
250 }
251 
252 /**
253  * Is this boxing klass?
254  */
255 bool ciInstanceKlass::is_box_klass() const {
256   return is_java_primitive(box_klass_type());
257 }
258 
259 /**
260  *  Is this boxed value offset?
261  */
262 bool ciInstanceKlass::is_boxed_value_offset(int offset) const {
263   BasicType bt = box_klass_type();
264   return is_java_primitive(bt) &&
265          (offset == java_lang_boxing_object::value_offset(bt));
266 }
267 
268 // ------------------------------------------------------------------
269 // ciInstanceKlass::is_in_package
270 //
271 // Is this klass in the given package?
272 bool ciInstanceKlass::is_in_package(const char* packagename, int len) {
273   // To avoid class loader mischief, this test always rejects application classes.
274   if (!uses_default_loader())
275     return false;
276   GUARDED_VM_ENTRY(
277     return is_in_package_impl(packagename, len);
278   )
279 }
280 
281 bool ciInstanceKlass::is_in_package_impl(const char* packagename, int len) {
282   ASSERT_IN_VM;
283 
284   // If packagename contains trailing '/' exclude it from the
285   // prefix-test since we test for it explicitly.
286   if (packagename[len - 1] == '/')
287     len--;
288 
289   if (!name()->starts_with(packagename, len))
290     return false;
291 
292   // Test if the class name is something like "java/lang".
293   if ((len + 1) > name()->utf8_length())
294     return false;
295 
296   // Test for trailing '/'
297   if (name()->char_at(len) != '/')
298     return false;
299 
300   // Make sure it's not actually in a subpackage:
301   if (name()->index_of_at(len+1, "/", 1) >= 0)
302     return false;
303 
304   return true;
305 }
306 
307 // ------------------------------------------------------------------
308 // ciInstanceKlass::print_impl
309 //
310 // Implementation of the print method.
311 void ciInstanceKlass::print_impl(outputStream* st) {
312   ciKlass::print_impl(st);
313   GUARDED_VM_ENTRY(st->print(" loader=" INTPTR_FORMAT, p2i(loader()));)
314   if (is_loaded()) {
315     st->print(" initialized=%s finalized=%s subklass=%s size=%d flags=",
316               bool_to_str(is_initialized()),
317               bool_to_str(has_finalizer()),
318               bool_to_str(has_subklass()),
319               layout_helper());
320 
321     _flags.print_klass_flags();
322 
323     if (_super) {
324       st->print(" super=");
325       _super->print_name();
326     }
327     if (_java_mirror) {
328       st->print(" mirror=PRESENT");
329     }
330   }
331 }
332 
333 // ------------------------------------------------------------------
334 // ciInstanceKlass::super
335 //
336 // Get the superklass of this klass.
337 ciInstanceKlass* ciInstanceKlass::super() {
338   assert(is_loaded(), "must be loaded");
339   if (_super == nullptr && !is_java_lang_Object()) {
340     GUARDED_VM_ENTRY(
341       Klass* super_klass = get_instanceKlass()->super();
342       _super = CURRENT_ENV->get_instance_klass(super_klass);
343     )
344   }
345   return _super;
346 }
347 
348 // ------------------------------------------------------------------
349 // ciInstanceKlass::java_mirror
350 //
351 // Get the instance of java.lang.Class corresponding to this klass.
352 // Cache it on this->_java_mirror.
353 ciInstance* ciInstanceKlass::java_mirror() {
354   if (is_shared()) {
355     return ciKlass::java_mirror();
356   }
357   if (_java_mirror == nullptr) {
358     _java_mirror = ciKlass::java_mirror();
359   }
360   return _java_mirror;
361 }
362 
363 // ------------------------------------------------------------------
364 // ciInstanceKlass::unique_concrete_subklass
365 ciInstanceKlass* ciInstanceKlass::unique_concrete_subklass() {
366   if (!is_loaded())     return nullptr; // No change if class is not loaded
367   if (!is_abstract())   return nullptr; // Only applies to abstract classes.
368   if (!has_subklass())  return nullptr; // Must have at least one subklass.
369   VM_ENTRY_MARK;
370   InstanceKlass* ik = get_instanceKlass();
371   Klass* up = ik->up_cast_abstract();
372   assert(up->is_instance_klass(), "must be InstanceKlass");
373   if (ik == up) {
374     return nullptr;
375   }
376   return CURRENT_THREAD_ENV->get_instance_klass(up);
377 }
378 
379 // ------------------------------------------------------------------
380 // ciInstanceKlass::has_finalizable_subclass
381 bool ciInstanceKlass::has_finalizable_subclass() {
382   if (!is_loaded())     return true;
383   VM_ENTRY_MARK;
384   return Dependencies::find_finalizable_subclass(get_instanceKlass()) != nullptr;
385 }
386 
387 // ------------------------------------------------------------------
388 // ciInstanceKlass::contains_field_offset
389 bool ciInstanceKlass::contains_field_offset(int offset) {
390   VM_ENTRY_MARK;
391   return get_instanceKlass()->contains_field_offset(offset);
392 }
393 
394 // ------------------------------------------------------------------
395 // ciInstanceKlass::get_field_by_offset
396 ciField* ciInstanceKlass::get_field_by_offset(int field_offset, bool is_static) {
397   if (!is_static) {
398     for (int i = 0, len = nof_nonstatic_fields(); i < len; i++) {
399       ciField* field = _nonstatic_fields->at(i);
400       int  field_off = field->offset_in_bytes();
401       if (field_off == field_offset)
402         return field;
403       if (field_off > field_offset)
404         break;
405       // could do binary search or check bins, but probably not worth it
406     }
407     return nullptr;
408   }
409   VM_ENTRY_MARK;
410   InstanceKlass* k = get_instanceKlass();
411   fieldDescriptor fd;
412   if (!k->find_field_from_offset(field_offset, is_static, &fd)) {
413     return nullptr;
414   }
415   ciField* field = new (CURRENT_THREAD_ENV->arena()) ciField(&fd);
416   return field;
417 }
418 
419 // ------------------------------------------------------------------
420 // ciInstanceKlass::get_field_by_name
421 ciField* ciInstanceKlass::get_field_by_name(ciSymbol* name, ciSymbol* signature, bool is_static) {
422   VM_ENTRY_MARK;
423   InstanceKlass* k = get_instanceKlass();
424   fieldDescriptor fd;
425   Klass* def = k->find_field(name->get_symbol(), signature->get_symbol(), is_static, &fd);
426   if (def == nullptr) {
427     return nullptr;
428   }
429   ciField* field = new (CURRENT_THREAD_ENV->arena()) ciField(&fd);
430   return field;
431 }
432 
433 
434 static int sort_field_by_offset(ciField** a, ciField** b) {
435   return (*a)->offset_in_bytes() - (*b)->offset_in_bytes();
436   // (no worries about 32-bit overflow...)
437 }
438 
439 // ------------------------------------------------------------------
440 // ciInstanceKlass::compute_nonstatic_fields
441 int ciInstanceKlass::compute_nonstatic_fields() {
442   assert(is_loaded(), "must be loaded");
443 
444   if (_nonstatic_fields != nullptr)
445     return _nonstatic_fields->length();
446 
447   if (!has_nonstatic_fields()) {
448     Arena* arena = CURRENT_ENV->arena();
449     _nonstatic_fields = new (arena) GrowableArray<ciField*>(arena, 0, 0, nullptr);
450     return 0;
451   }
452   assert(!is_java_lang_Object(), "bootstrap OK");
453 
454   ciInstanceKlass* super = this->super();
455   GrowableArray<ciField*>* super_fields = nullptr;
456   if (super != nullptr && super->has_nonstatic_fields()) {
457     int super_flen   = super->nof_nonstatic_fields();
458     super_fields = super->_nonstatic_fields;
459     assert(super_flen == 0 || super_fields != nullptr, "first get nof_fields");
460   }
461 
462   GrowableArray<ciField*>* fields = nullptr;
463   GUARDED_VM_ENTRY({
464       fields = compute_nonstatic_fields_impl(super_fields);
465     });
466 
467   if (fields == nullptr) {
468     // This can happen if this class (java.lang.Class) has invisible fields.
469     if (super_fields != nullptr) {
470       _nonstatic_fields = super_fields;
471       return super_fields->length();
472     } else {
473       return 0;
474     }
475   }
476 
477   int flen = fields->length();
478 
479   // Now sort them by offset, ascending.
480   // (In principle, they could mix with superclass fields.)
481   fields->sort(sort_field_by_offset);
482   _nonstatic_fields = fields;
483   return flen;
484 }
485 
486 GrowableArray<ciField*>*
487 ciInstanceKlass::compute_nonstatic_fields_impl(GrowableArray<ciField*>*
488                                                super_fields) {
489   ASSERT_IN_VM;
490   Arena* arena = CURRENT_ENV->arena();
491   int flen = 0;
492   GrowableArray<ciField*>* fields = nullptr;
493   InstanceKlass* k = get_instanceKlass();
494   for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
495     if (fs.access_flags().is_static())  continue;
496     flen += 1;
497   }
498 
499   // allocate the array:
500   if (flen == 0) {
501     return nullptr;  // return nothing if none are locally declared
502   }
503   if (super_fields != nullptr) {
504     flen += super_fields->length();
505   }
506   fields = new (arena) GrowableArray<ciField*>(arena, flen, 0, nullptr);
507   if (super_fields != nullptr) {
508     fields->appendAll(super_fields);
509   }
510 
511   for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
512     if (fs.access_flags().is_static())  continue;
513     fieldDescriptor& fd = fs.field_descriptor();
514     ciField* field = new (arena) ciField(&fd);
515     fields->append(field);
516   }
517   assert(fields->length() == flen, "sanity");
518   return fields;
519 }
520 
521 bool ciInstanceKlass::compute_injected_fields_helper() {
522   ASSERT_IN_VM;
523   InstanceKlass* k = get_instanceKlass();
524 
525   for (InternalFieldStream fs(k); !fs.done(); fs.next()) {
526     if (fs.access_flags().is_static())  continue;
527     return true;
528   }
529   return false;
530 }
531 
532 void ciInstanceKlass::compute_injected_fields() {
533   assert(is_loaded(), "must be loaded");
534 
535   int has_injected_fields = 0;
536   if (super() != nullptr && super()->has_injected_fields()) {
537     has_injected_fields = 1;
538   } else {
539     GUARDED_VM_ENTRY({
540         has_injected_fields = compute_injected_fields_helper() ? 1 : 0;
541       });
542   }
543   // may be concurrently initialized for shared ciInstanceKlass objects
544   assert(_has_injected_fields == -1 || _has_injected_fields == has_injected_fields, "broken concurrent initialization");
545   _has_injected_fields = has_injected_fields;
546 }
547 
548 bool ciInstanceKlass::has_object_fields() const {
549   GUARDED_VM_ENTRY(
550       return get_instanceKlass()->nonstatic_oop_map_size() > 0;
551     );
552 }
553 
554 bool ciInstanceKlass::compute_has_trusted_loader() {
555   ASSERT_IN_VM;
556   oop loader_oop = loader();
557   if (loader_oop == nullptr) {
558     return true; // bootstrap class loader
559   }
560   return java_lang_ClassLoader::is_trusted_loader(loader_oop);
561 }
562 
563 // ------------------------------------------------------------------
564 // ciInstanceKlass::find_method
565 //
566 // Find a method in this klass.
567 ciMethod* ciInstanceKlass::find_method(ciSymbol* name, ciSymbol* signature) {
568   VM_ENTRY_MARK;
569   InstanceKlass* k = get_instanceKlass();
570   Symbol* name_sym = name->get_symbol();
571   Symbol* sig_sym= signature->get_symbol();
572 
573   Method* m = k->find_method(name_sym, sig_sym);
574   if (m == nullptr)  return nullptr;
575 
576   return CURRENT_THREAD_ENV->get_method(m);
577 }
578 
579 // ------------------------------------------------------------------
580 // ciInstanceKlass::is_leaf_type
581 bool ciInstanceKlass::is_leaf_type() {
582   assert(is_loaded(), "must be loaded");
583   if (is_shared()) {
584     return is_final();  // approximately correct
585   } else {
586     return !has_subklass() && (nof_implementors() == 0);
587   }
588 }
589 
590 // ------------------------------------------------------------------
591 // ciInstanceKlass::implementor
592 //
593 // Report an implementor of this interface.
594 // Note that there are various races here, since my copy
595 // of _nof_implementors might be out of date with respect
596 // to results returned by InstanceKlass::implementor.
597 // This is OK, since any dependencies we decide to assert
598 // will be checked later under the Compile_lock.
599 ciInstanceKlass* ciInstanceKlass::implementor() {
600   ciInstanceKlass* impl = _implementor;
601   if (impl == nullptr) {
602     if (is_shared()) {
603       impl = this; // assume a well-known interface never has a unique implementor
604     } else {
605       // Go into the VM to fetch the implementor.
606       VM_ENTRY_MARK;
607       InstanceKlass* ik = get_instanceKlass();
608       Klass* implk = ik->implementor();
609       if (implk != nullptr) {
610         if (implk == ik) {
611           // More than one implementors. Use 'this' in this case.
612           impl = this;
613         } else {
614           impl = CURRENT_THREAD_ENV->get_instance_klass(implk);
615         }
616       }
617     }
618     // Memoize this result.
619     _implementor = impl;
620   }
621   return impl;
622 }
623 
624 // Utility class for printing of the contents of the static fields for
625 // use by compilation replay.  It only prints out the information that
626 // could be consumed by the compiler, so for primitive types it prints
627 // out the actual value.  For Strings it's the actual string value.
628 // For array types it it's first level array size since that's the
629 // only value which statically unchangeable.  For all other reference
630 // types it simply prints out the dynamic type.
631 
632 class StaticFinalFieldPrinter : public FieldClosure {
633   outputStream* _out;
634   const char*   _holder;
635  public:
636   StaticFinalFieldPrinter(outputStream* out, const char* holder) :
637     _out(out),
638     _holder(holder) {
639   }
640   void do_field(fieldDescriptor* fd) {
641     if (fd->is_final() && !fd->has_initial_value()) {
642       ResourceMark rm;
643       oop mirror = fd->field_holder()->java_mirror();
644       _out->print("staticfield %s %s %s ", _holder, fd->name()->as_quoted_ascii(), fd->signature()->as_quoted_ascii());
645       BasicType field_type = fd->field_type();
646       switch (field_type) {
647         case T_BYTE:    _out->print_cr("%d", mirror->byte_field(fd->offset()));   break;
648         case T_BOOLEAN: _out->print_cr("%d", mirror->bool_field(fd->offset()));   break;
649         case T_SHORT:   _out->print_cr("%d", mirror->short_field(fd->offset()));  break;
650         case T_CHAR:    _out->print_cr("%d", mirror->char_field(fd->offset()));   break;
651         case T_INT:     _out->print_cr("%d", mirror->int_field(fd->offset()));    break;
652         case T_LONG:    _out->print_cr(INT64_FORMAT, (int64_t)(mirror->long_field(fd->offset())));   break;
653         case T_FLOAT: {
654           float f = mirror->float_field(fd->offset());
655           _out->print_cr("%d", *(int*)&f);
656           break;
657         }
658         case T_DOUBLE: {
659           double d = mirror->double_field(fd->offset());
660           _out->print_cr(INT64_FORMAT, *(int64_t*)&d);
661           break;
662         }
663         case T_ARRAY:  // fall-through
664         case T_OBJECT: {
665           oop value =  mirror->obj_field_acquire(fd->offset());
666           if (value == nullptr) {
667             if (field_type == T_ARRAY) {
668               _out->print("%d", -1);
669             }
670             _out->cr();
671           } else if (value->is_instance()) {
672             assert(field_type == T_OBJECT, "");
673             if (value->is_a(vmClasses::String_klass())) {
674               const char* ascii_value = java_lang_String::as_quoted_ascii(value);
675               _out->print_cr("\"%s\"", (ascii_value != nullptr) ? ascii_value : "");
676             } else {
677               const char* klass_name  = value->klass()->name()->as_quoted_ascii();
678               _out->print_cr("%s", klass_name);
679             }
680           } else if (value->is_array()) {
681             typeArrayOop ta = (typeArrayOop)value;
682             _out->print("%d", ta->length());
683             if (value->is_objArray()) {
684               objArrayOop oa = (objArrayOop)value;
685               const char* klass_name  = value->klass()->name()->as_quoted_ascii();
686               _out->print(" %s", klass_name);
687             }
688             _out->cr();
689           } else {
690             ShouldNotReachHere();
691           }
692           break;
693         }
694         default:
695           ShouldNotReachHere();
696         }
697     }
698   }
699 };
700 
701 const char *ciInstanceKlass::replay_name() const {
702   return CURRENT_ENV->replay_name(get_instanceKlass());
703 }
704 
705 void ciInstanceKlass::dump_replay_instanceKlass(outputStream* out, InstanceKlass* ik) {
706   if (ik->is_hidden()) {
707     const char *name = CURRENT_ENV->dyno_name(ik);
708     if (name != nullptr) {
709       out->print_cr("instanceKlass %s # %s", name, ik->name()->as_quoted_ascii());
710     } else {
711       out->print_cr("# instanceKlass %s", ik->name()->as_quoted_ascii());
712     }
713   } else {
714     out->print_cr("instanceKlass %s", ik->name()->as_quoted_ascii());
715   }
716 }
717 
718 GrowableArray<ciInstanceKlass*>* ciInstanceKlass::transitive_interfaces() const{
719   if (_transitive_interfaces == nullptr) {
720     const_cast<ciInstanceKlass*>(this)->compute_transitive_interfaces();
721   }
722   return _transitive_interfaces;
723 }
724 
725 void ciInstanceKlass::compute_transitive_interfaces() {
726   GUARDED_VM_ENTRY(
727           InstanceKlass* ik = get_instanceKlass();
728           Array<InstanceKlass*>* interfaces = ik->transitive_interfaces();
729           int orig_length = interfaces->length();
730           Arena* arena = CURRENT_ENV->arena();
731           int transitive_interfaces_len = orig_length + (is_interface() ? 1 : 0);
732           GrowableArray<ciInstanceKlass*>* transitive_interfaces = new(arena)GrowableArray<ciInstanceKlass*>(arena, transitive_interfaces_len,
733                                                                                                              0, nullptr);
734           for (int i = 0; i < orig_length; i++) {
735             transitive_interfaces->append(CURRENT_ENV->get_instance_klass(interfaces->at(i)));
736           }
737           if (is_interface()) {
738             transitive_interfaces->append(this);
739           }
740           _transitive_interfaces = transitive_interfaces;
741   );
742 }
743 
744 void ciInstanceKlass::dump_replay_data(outputStream* out) {
745   ResourceMark rm;
746 
747   InstanceKlass* ik = get_instanceKlass();
748   ConstantPool*  cp = ik->constants();
749 
750   // Try to record related loaded classes
751   Klass* sub = ik->subklass();
752   while (sub != nullptr) {
753     if (sub->is_instance_klass()) {
754       InstanceKlass *isub = InstanceKlass::cast(sub);
755       dump_replay_instanceKlass(out, isub);
756     }
757     sub = sub->next_sibling();
758   }
759 
760   // Dump out the state of the constant pool tags.  During replay the
761   // tags will be validated for things which shouldn't change and
762   // classes will be resolved if the tags indicate that they were
763   // resolved at compile time.
764   const char *name = replay_name();
765   out->print("ciInstanceKlass %s %d %d %d", name,
766              is_linked(), is_initialized(), cp->length());
767   for (int index = 1; index < cp->length(); index++) {
768     out->print(" %d", cp->tags()->at(index));
769   }
770   out->cr();
771   if (is_initialized()) {
772     //  Dump out the static final fields in case the compilation relies
773     //  on their value for correct replay.
774     StaticFinalFieldPrinter sffp(out, name);
775     ik->do_local_static_fields(&sffp);
776   }
777 }
778 
779 #ifdef ASSERT
780 bool ciInstanceKlass::debug_final_field_at(int offset) {
781   GUARDED_VM_ENTRY(
782     InstanceKlass* ik = get_instanceKlass();
783     fieldDescriptor fd;
784     if (ik->find_field_from_offset(offset, false, &fd)) {
785       return fd.is_final();
786     }
787   );
788   return false;
789 }
790 
791 bool ciInstanceKlass::debug_stable_field_at(int offset) {
792   GUARDED_VM_ENTRY(
793     InstanceKlass* ik = get_instanceKlass();
794     fieldDescriptor fd;
795     if (ik->find_field_from_offset(offset, false, &fd)) {
796       return fd.is_stable();
797     }
798   );
799   return false;
800 }
801 #endif