1 /*
  2  * Copyright (c) 1999, 2022, 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.inline.hpp"
 30 #include "classfile/javaClasses.hpp"
 31 #include "classfile/vmClasses.hpp"
 32 #include "memory/allocation.hpp"
 33 #include "memory/allocation.inline.hpp"
 34 #include "memory/resourceArea.hpp"
 35 #include "oops/instanceKlass.inline.hpp"
 36 #include "oops/klass.inline.hpp"
 37 #include "oops/oop.inline.hpp"
 38 #include "oops/fieldStreams.inline.hpp"
 39 #include "runtime/fieldDescriptor.inline.hpp"
 40 #include "runtime/handles.inline.hpp"
 41 #include "runtime/jniHandles.inline.hpp"
 42 
 43 // ciInstanceKlass
 44 //
 45 // This class represents a Klass* in the HotSpot virtual machine
 46 // whose Klass part in an InstanceKlass.
 47 
 48 
 49 // ------------------------------------------------------------------
 50 // ciInstanceKlass::ciInstanceKlass
 51 //
 52 // Loaded instance klass.
 53 ciInstanceKlass::ciInstanceKlass(Klass* k) :
 54   ciKlass(k)
 55 {
 56   assert(get_Klass()->is_instance_klass(), "wrong type");
 57   assert(get_instanceKlass()->is_loaded(), "must be at least loaded");
 58   InstanceKlass* ik = get_instanceKlass();
 59 
 60   AccessFlags access_flags = ik->access_flags();
 61   _flags = ciFlags(access_flags);
 62   _has_finalizer = access_flags.has_finalizer();
 63   _has_subklass = flags().is_final() ? subklass_false : subklass_unknown;
 64   _init_state = ik->init_state();
 65   _has_nonstatic_fields = ik->has_nonstatic_fields();
 66   _has_nonstatic_concrete_methods = ik->has_nonstatic_concrete_methods();
 67   _is_hidden = ik->is_hidden();
 68   _is_record = ik->is_record();
 69   _nonstatic_fields = NULL; // initialized lazily by compute_nonstatic_fields:
 70   _has_injected_fields = -1;
 71   _implementor = NULL; // we will fill these lazily
 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 == NULL). 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 != NULL, "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     _protection_domain = JNIHandles::make_local(thread,
 93                                                 ik->protection_domain());
 94     _is_shared = false;
 95   } else {
 96     Handle h_loader(thread, ik->class_loader());
 97     Handle h_protection_domain(thread, ik->protection_domain());
 98     _loader = JNIHandles::make_global(h_loader);
 99     _protection_domain = JNIHandles::make_global(h_protection_domain);
100     _is_shared = true;
101   }
102 
103   _has_trusted_loader = compute_has_trusted_loader();
104 
105   // Lazy fields get filled in only upon request.
106   _super  = NULL;
107   _java_mirror = NULL;
108 
109   if (is_shared()) {
110     if (k != vmClasses::Object_klass()) {
111       super();
112     }
113     //compute_nonstatic_fields();  // done outside of constructor
114   }
115 
116   _field_cache = NULL;
117 }
118 
119 // Version for unloaded classes:
120 ciInstanceKlass::ciInstanceKlass(ciSymbol* name,
121                                  jobject loader, jobject protection_domain)
122   : ciKlass(name, T_OBJECT)
123 {
124   assert(name->char_at(0) != JVM_SIGNATURE_ARRAY, "not an instance klass");
125   _init_state = (InstanceKlass::ClassState)0;
126   _has_nonstatic_fields = false;
127   _nonstatic_fields = NULL;
128   _has_injected_fields = -1;
129   _is_hidden = false;
130   _is_record = false;
131   _loader = loader;
132   _protection_domain = protection_domain;
133   _is_shared = false;
134   _super = NULL;
135   _java_mirror = NULL;
136   _field_cache = NULL;
137   _has_trusted_loader = compute_has_trusted_loader();
138 }
139 
140 
141 
142 // ------------------------------------------------------------------
143 // ciInstanceKlass::compute_shared_is_initialized
144 void ciInstanceKlass::compute_shared_init_state() {
145   GUARDED_VM_ENTRY(
146     InstanceKlass* ik = get_instanceKlass();
147     _init_state = ik->init_state();
148   )
149 }
150 
151 // ------------------------------------------------------------------
152 // ciInstanceKlass::compute_shared_has_subklass
153 bool ciInstanceKlass::compute_shared_has_subklass() {
154   GUARDED_VM_ENTRY(
155     InstanceKlass* ik = get_instanceKlass();
156     _has_subklass = ik->subklass() != NULL ? subklass_true : subklass_false;
157     return _has_subklass == subklass_true;
158   )
159 }
160 
161 // ------------------------------------------------------------------
162 // ciInstanceKlass::loader
163 oop ciInstanceKlass::loader() {
164   ASSERT_IN_VM;
165   return JNIHandles::resolve(_loader);
166 }
167 
168 // ------------------------------------------------------------------
169 // ciInstanceKlass::loader_handle
170 jobject ciInstanceKlass::loader_handle() {
171   return _loader;
172 }
173 
174 // ------------------------------------------------------------------
175 // ciInstanceKlass::protection_domain
176 oop ciInstanceKlass::protection_domain() {
177   ASSERT_IN_VM;
178   return JNIHandles::resolve(_protection_domain);
179 }
180 
181 // ------------------------------------------------------------------
182 // ciInstanceKlass::protection_domain_handle
183 jobject ciInstanceKlass::protection_domain_handle() {
184   return _protection_domain;
185 }
186 
187 // ------------------------------------------------------------------
188 // ciInstanceKlass::field_cache
189 //
190 // Get the field cache associated with this klass.
191 ciConstantPoolCache* ciInstanceKlass::field_cache() {
192   if (is_shared()) {
193     return NULL;
194   }
195   if (_field_cache == NULL) {
196     assert(!is_java_lang_Object(), "Object has no fields");
197     Arena* arena = CURRENT_ENV->arena();
198     _field_cache = new (arena) ciConstantPoolCache(arena, 5);
199   }
200   return _field_cache;
201 }
202 
203 // ------------------------------------------------------------------
204 // ciInstanceKlass::get_canonical_holder
205 //
206 ciInstanceKlass* ciInstanceKlass::get_canonical_holder(int offset) {
207   #ifdef ASSERT
208   if (!(offset >= 0 && offset < layout_helper_size_in_bytes())) {
209     tty->print("*** get_canonical_holder(%d) on ", offset);
210     this->print();
211     tty->print_cr(" ***");
212   };
213   assert(offset >= 0 && offset < layout_helper_size_in_bytes(), "offset must be tame");
214   #endif
215 
216   if (offset < instanceOopDesc::base_offset_in_bytes()) {
217     // All header offsets belong properly to java/lang/Object.
218     return CURRENT_ENV->Object_klass();
219   }
220 
221   ciInstanceKlass* self = this;
222   assert(self->is_loaded(), "must be loaded to access field info");
223   ciField* field = self->get_field_by_offset(offset, false);
224   if (field != NULL) {
225     return field->holder();
226   } else {
227     for (;;) {
228       assert(self->is_loaded(), "must be loaded to have size");
229       ciInstanceKlass* super = self->super();
230       if (super == NULL ||
231           super->nof_nonstatic_fields() == 0 ||
232           super->layout_helper_size_in_bytes() <= offset) {
233         return self;
234       } else {
235         self = super;  // return super->get_canonical_holder(offset)
236       }
237     }
238   }
239 }
240 
241 // ------------------------------------------------------------------
242 // ciInstanceKlass::is_java_lang_Object
243 //
244 // Is this klass java.lang.Object?
245 bool ciInstanceKlass::is_java_lang_Object() const {
246   return equals(CURRENT_ENV->Object_klass());
247 }
248 
249 // ------------------------------------------------------------------
250 // ciInstanceKlass::uses_default_loader
251 bool ciInstanceKlass::uses_default_loader() const {
252   // Note:  We do not need to resolve the handle or enter the VM
253   // in order to test null-ness.
254   return _loader == NULL;
255 }
256 
257 // ------------------------------------------------------------------
258 
259 /**
260  * Return basic type of boxed value for box klass or T_OBJECT if not.
261  */
262 BasicType ciInstanceKlass::box_klass_type() const {
263   if (uses_default_loader() && is_loaded()) {
264     return vmClasses::box_klass_type(get_Klass());
265   } else {
266     return T_OBJECT;
267   }
268 }
269 
270 /**
271  * Is this boxing klass?
272  */
273 bool ciInstanceKlass::is_box_klass() const {
274   return is_java_primitive(box_klass_type());
275 }
276 
277 /**
278  *  Is this boxed value offset?
279  */
280 bool ciInstanceKlass::is_boxed_value_offset(int offset) const {
281   BasicType bt = box_klass_type();
282   return is_java_primitive(bt) &&
283          (offset == java_lang_boxing_object::value_offset(bt));
284 }
285 
286 // ------------------------------------------------------------------
287 // ciInstanceKlass::is_in_package
288 //
289 // Is this klass in the given package?
290 bool ciInstanceKlass::is_in_package(const char* packagename, int len) {
291   // To avoid class loader mischief, this test always rejects application classes.
292   if (!uses_default_loader())
293     return false;
294   GUARDED_VM_ENTRY(
295     return is_in_package_impl(packagename, len);
296   )
297 }
298 
299 bool ciInstanceKlass::is_in_package_impl(const char* packagename, int len) {
300   ASSERT_IN_VM;
301 
302   // If packagename contains trailing '/' exclude it from the
303   // prefix-test since we test for it explicitly.
304   if (packagename[len - 1] == '/')
305     len--;
306 
307   if (!name()->starts_with(packagename, len))
308     return false;
309 
310   // Test if the class name is something like "java/lang".
311   if ((len + 1) > name()->utf8_length())
312     return false;
313 
314   // Test for trailing '/'
315   if (name()->char_at(len) != '/')
316     return false;
317 
318   // Make sure it's not actually in a subpackage:
319   if (name()->index_of_at(len+1, "/", 1) >= 0)
320     return false;
321 
322   return true;
323 }
324 
325 // ------------------------------------------------------------------
326 // ciInstanceKlass::print_impl
327 //
328 // Implementation of the print method.
329 void ciInstanceKlass::print_impl(outputStream* st) {
330   ciKlass::print_impl(st);
331   GUARDED_VM_ENTRY(st->print(" loader=" INTPTR_FORMAT, p2i(loader()));)
332   if (is_loaded()) {
333     st->print(" initialized=%s finalized=%s subklass=%s size=%d flags=",
334               bool_to_str(is_initialized()),
335               bool_to_str(has_finalizer()),
336               bool_to_str(has_subklass()),
337               layout_helper());
338 
339     _flags.print_klass_flags();
340 
341     if (_super) {
342       st->print(" super=");
343       _super->print_name();
344     }
345     if (_java_mirror) {
346       st->print(" mirror=PRESENT");
347     }
348   }
349 }
350 
351 // ------------------------------------------------------------------
352 // ciInstanceKlass::super
353 //
354 // Get the superklass of this klass.
355 ciInstanceKlass* ciInstanceKlass::super() {
356   assert(is_loaded(), "must be loaded");
357   if (_super == NULL && !is_java_lang_Object()) {
358     GUARDED_VM_ENTRY(
359       Klass* super_klass = get_instanceKlass()->super();
360       _super = CURRENT_ENV->get_instance_klass(super_klass);
361     )
362   }
363   return _super;
364 }
365 
366 // ------------------------------------------------------------------
367 // ciInstanceKlass::java_mirror
368 //
369 // Get the instance of java.lang.Class corresponding to this klass.
370 // Cache it on this->_java_mirror.
371 ciInstance* ciInstanceKlass::java_mirror() {
372   if (is_shared()) {
373     return ciKlass::java_mirror();
374   }
375   if (_java_mirror == NULL) {
376     _java_mirror = ciKlass::java_mirror();
377   }
378   return _java_mirror;
379 }
380 
381 // ------------------------------------------------------------------
382 // ciInstanceKlass::unique_concrete_subklass
383 ciInstanceKlass* ciInstanceKlass::unique_concrete_subklass() {
384   if (!is_loaded())     return NULL; // No change if class is not loaded
385   if (!is_abstract())   return NULL; // Only applies to abstract classes.
386   if (!has_subklass())  return NULL; // Must have at least one subklass.
387   VM_ENTRY_MARK;
388   InstanceKlass* ik = get_instanceKlass();
389   Klass* up = ik->up_cast_abstract();
390   assert(up->is_instance_klass(), "must be InstanceKlass");
391   if (ik == up) {
392     return NULL;
393   }
394   return CURRENT_THREAD_ENV->get_instance_klass(up);
395 }
396 
397 // ------------------------------------------------------------------
398 // ciInstanceKlass::has_finalizable_subclass
399 bool ciInstanceKlass::has_finalizable_subclass() {
400   if (!is_loaded())     return true;
401   VM_ENTRY_MARK;
402   return Dependencies::find_finalizable_subclass(get_instanceKlass()) != NULL;
403 }
404 
405 // ------------------------------------------------------------------
406 // ciInstanceKlass::contains_field_offset
407 bool ciInstanceKlass::contains_field_offset(int offset) {
408   VM_ENTRY_MARK;
409   return get_instanceKlass()->contains_field_offset(offset);
410 }
411 
412 // ------------------------------------------------------------------
413 // ciInstanceKlass::get_field_by_offset
414 ciField* ciInstanceKlass::get_field_by_offset(int field_offset, bool is_static) {
415   if (!is_static) {
416     for (int i = 0, len = nof_nonstatic_fields(); i < len; i++) {
417       ciField* field = _nonstatic_fields->at(i);
418       int  field_off = field->offset_in_bytes();
419       if (field_off == field_offset)
420         return field;
421       if (field_off > field_offset)
422         break;
423       // could do binary search or check bins, but probably not worth it
424     }
425     return NULL;
426   }
427   VM_ENTRY_MARK;
428   InstanceKlass* k = get_instanceKlass();
429   fieldDescriptor fd;
430   if (!k->find_field_from_offset(field_offset, is_static, &fd)) {
431     return NULL;
432   }
433   ciField* field = new (CURRENT_THREAD_ENV->arena()) ciField(&fd);
434   return field;
435 }
436 
437 // ------------------------------------------------------------------
438 // ciInstanceKlass::get_field_by_name
439 ciField* ciInstanceKlass::get_field_by_name(ciSymbol* name, ciSymbol* signature, bool is_static) {
440   VM_ENTRY_MARK;
441   InstanceKlass* k = get_instanceKlass();
442   fieldDescriptor fd;
443   Klass* def = k->find_field(name->get_symbol(), signature->get_symbol(), is_static, &fd);
444   if (def == NULL) {
445     return NULL;
446   }
447   ciField* field = new (CURRENT_THREAD_ENV->arena()) ciField(&fd);
448   return field;
449 }
450 
451 
452 static int sort_field_by_offset(ciField** a, ciField** b) {
453   return (*a)->offset_in_bytes() - (*b)->offset_in_bytes();
454   // (no worries about 32-bit overflow...)
455 }
456 
457 // ------------------------------------------------------------------
458 // ciInstanceKlass::compute_nonstatic_fields
459 int ciInstanceKlass::compute_nonstatic_fields() {
460   assert(is_loaded(), "must be loaded");
461 
462   if (_nonstatic_fields != NULL)
463     return _nonstatic_fields->length();
464 
465   if (!has_nonstatic_fields()) {
466     Arena* arena = CURRENT_ENV->arena();
467     _nonstatic_fields = new (arena) GrowableArray<ciField*>(arena, 0, 0, NULL);
468     return 0;
469   }
470   assert(!is_java_lang_Object(), "bootstrap OK");
471 
472   ciInstanceKlass* super = this->super();
473   GrowableArray<ciField*>* super_fields = NULL;
474   if (super != NULL && super->has_nonstatic_fields()) {
475     int super_flen   = super->nof_nonstatic_fields();
476     super_fields = super->_nonstatic_fields;
477     assert(super_flen == 0 || super_fields != NULL, "first get nof_fields");
478   }
479 
480   GrowableArray<ciField*>* fields = NULL;
481   GUARDED_VM_ENTRY({
482       fields = compute_nonstatic_fields_impl(super_fields);
483     });
484 
485   if (fields == NULL) {
486     // This can happen if this class (java.lang.Class) has invisible fields.
487     if (super_fields != NULL) {
488       _nonstatic_fields = super_fields;
489       return super_fields->length();
490     } else {
491       return 0;
492     }
493   }
494 
495   int flen = fields->length();
496 
497   // Now sort them by offset, ascending.
498   // (In principle, they could mix with superclass fields.)
499   fields->sort(sort_field_by_offset);
500   _nonstatic_fields = fields;
501   return flen;
502 }
503 
504 GrowableArray<ciField*>*
505 ciInstanceKlass::compute_nonstatic_fields_impl(GrowableArray<ciField*>*
506                                                super_fields) {
507   ASSERT_IN_VM;
508   Arena* arena = CURRENT_ENV->arena();
509   int flen = 0;
510   GrowableArray<ciField*>* fields = NULL;
511   InstanceKlass* k = get_instanceKlass();
512   for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
513     if (fs.access_flags().is_static())  continue;
514     flen += 1;
515   }
516 
517   // allocate the array:
518   if (flen == 0) {
519     return NULL;  // return nothing if none are locally declared
520   }
521   if (super_fields != NULL) {
522     flen += super_fields->length();
523   }
524   fields = new (arena) GrowableArray<ciField*>(arena, flen, 0, NULL);
525   if (super_fields != NULL) {
526     fields->appendAll(super_fields);
527   }
528 
529   for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
530     if (fs.access_flags().is_static())  continue;
531     fieldDescriptor& fd = fs.field_descriptor();
532     ciField* field = new (arena) ciField(&fd);
533     fields->append(field);
534   }
535   assert(fields->length() == flen, "sanity");
536   return fields;
537 }
538 
539 bool ciInstanceKlass::compute_injected_fields_helper() {
540   ASSERT_IN_VM;
541   InstanceKlass* k = get_instanceKlass();
542 
543   for (InternalFieldStream fs(k); !fs.done(); fs.next()) {
544     if (fs.access_flags().is_static())  continue;
545     return true;
546   }
547   return false;
548 }
549 
550 void ciInstanceKlass::compute_injected_fields() {
551   assert(is_loaded(), "must be loaded");
552 
553   int has_injected_fields = 0;
554   if (super() != NULL && super()->has_injected_fields()) {
555     has_injected_fields = 1;
556   } else {
557     GUARDED_VM_ENTRY({
558         has_injected_fields = compute_injected_fields_helper() ? 1 : 0;
559       });
560   }
561   // may be concurrently initialized for shared ciInstanceKlass objects
562   assert(_has_injected_fields == -1 || _has_injected_fields == has_injected_fields, "broken concurrent initialization");
563   _has_injected_fields = has_injected_fields;
564 }
565 
566 bool ciInstanceKlass::has_object_fields() const {
567   GUARDED_VM_ENTRY(
568       return get_instanceKlass()->nonstatic_oop_map_size() > 0;
569     );
570 }
571 
572 bool ciInstanceKlass::compute_has_trusted_loader() {
573   ASSERT_IN_VM;
574   oop loader_oop = loader();
575   if (loader_oop == NULL) {
576     return true; // bootstrap class loader
577   }
578   return java_lang_ClassLoader::is_trusted_loader(loader_oop);
579 }
580 
581 // ------------------------------------------------------------------
582 // ciInstanceKlass::find_method
583 //
584 // Find a method in this klass.
585 ciMethod* ciInstanceKlass::find_method(ciSymbol* name, ciSymbol* signature) {
586   VM_ENTRY_MARK;
587   InstanceKlass* k = get_instanceKlass();
588   Symbol* name_sym = name->get_symbol();
589   Symbol* sig_sym= signature->get_symbol();
590 
591   Method* m = k->find_method(name_sym, sig_sym);
592   if (m == NULL)  return NULL;
593 
594   return CURRENT_THREAD_ENV->get_method(m);
595 }
596 
597 // ------------------------------------------------------------------
598 // ciInstanceKlass::is_leaf_type
599 bool ciInstanceKlass::is_leaf_type() {
600   assert(is_loaded(), "must be loaded");
601   if (is_shared()) {
602     return is_final();  // approximately correct
603   } else {
604     return !has_subklass() && (nof_implementors() == 0);
605   }
606 }
607 
608 // ------------------------------------------------------------------
609 // ciInstanceKlass::implementor
610 //
611 // Report an implementor of this interface.
612 // Note that there are various races here, since my copy
613 // of _nof_implementors might be out of date with respect
614 // to results returned by InstanceKlass::implementor.
615 // This is OK, since any dependencies we decide to assert
616 // will be checked later under the Compile_lock.
617 ciInstanceKlass* ciInstanceKlass::implementor() {
618   ciInstanceKlass* impl = _implementor;
619   if (impl == NULL) {
620     if (is_shared()) {
621       impl = this; // assume a well-known interface never has a unique implementor
622     } else {
623       // Go into the VM to fetch the implementor.
624       VM_ENTRY_MARK;
625       MutexLocker ml(Compile_lock);
626       Klass* k = get_instanceKlass()->implementor();
627       if (k != NULL) {
628         if (k == get_instanceKlass()) {
629           // More than one implementors. Use 'this' in this case.
630           impl = this;
631         } else {
632           impl = CURRENT_THREAD_ENV->get_instance_klass(k);
633         }
634       }
635     }
636     // Memoize this result.
637     _implementor = impl;
638   }
639   return impl;
640 }
641 
642 // Utility class for printing of the contents of the static fields for
643 // use by compilation replay.  It only prints out the information that
644 // could be consumed by the compiler, so for primitive types it prints
645 // out the actual value.  For Strings it's the actual string value.
646 // For array types it it's first level array size since that's the
647 // only value which statically unchangeable.  For all other reference
648 // types it simply prints out the dynamic type.
649 
650 class StaticFinalFieldPrinter : public FieldClosure {
651   outputStream* _out;
652   const char*   _holder;
653  public:
654   StaticFinalFieldPrinter(outputStream* out, const char* holder) :
655     _out(out),
656     _holder(holder) {
657   }
658   void do_field(fieldDescriptor* fd) {
659     if (fd->is_final() && !fd->has_initial_value()) {
660       ResourceMark rm;
661       oop mirror = fd->field_holder()->java_mirror();
662       _out->print("staticfield %s %s %s ", _holder, fd->name()->as_quoted_ascii(), fd->signature()->as_quoted_ascii());
663       switch (fd->field_type()) {
664         case T_BYTE:    _out->print_cr("%d", mirror->byte_field(fd->offset()));   break;
665         case T_BOOLEAN: _out->print_cr("%d", mirror->bool_field(fd->offset()));   break;
666         case T_SHORT:   _out->print_cr("%d", mirror->short_field(fd->offset()));  break;
667         case T_CHAR:    _out->print_cr("%d", mirror->char_field(fd->offset()));   break;
668         case T_INT:     _out->print_cr("%d", mirror->int_field(fd->offset()));    break;
669         case T_LONG:    _out->print_cr(INT64_FORMAT, (int64_t)(mirror->long_field(fd->offset())));   break;
670         case T_FLOAT: {
671           float f = mirror->float_field(fd->offset());
672           _out->print_cr("%d", *(int*)&f);
673           break;
674         }
675         case T_DOUBLE: {
676           double d = mirror->double_field(fd->offset());
677           _out->print_cr(INT64_FORMAT, *(int64_t*)&d);
678           break;
679         }
680         case T_ARRAY:  // fall-through
681         case T_OBJECT: {
682           oop value =  mirror->obj_field_acquire(fd->offset());
683           if (value == NULL) {
684             _out->print_cr("null");
685           } else if (value->is_instance()) {
686             assert(fd->field_type() == T_OBJECT, "");
687             if (value->is_a(vmClasses::String_klass())) {
688               const char* ascii_value = java_lang_String::as_quoted_ascii(value);
689               _out->print_cr("\"%s\"", (ascii_value != NULL) ? ascii_value : "");
690             } else {
691               const char* klass_name  = value->klass()->name()->as_quoted_ascii();
692               _out->print_cr("%s", klass_name);
693             }
694           } else if (value->is_array()) {
695             typeArrayOop ta = (typeArrayOop)value;
696             _out->print("%d", ta->length());
697             if (value->is_objArray()) {
698               objArrayOop oa = (objArrayOop)value;
699               const char* klass_name  = value->klass()->name()->as_quoted_ascii();
700               _out->print(" %s", klass_name);
701             }
702             _out->cr();
703           } else {
704             ShouldNotReachHere();
705           }
706           break;
707         }
708         default:
709           ShouldNotReachHere();
710         }
711     }
712   }
713 };
714 
715 const char *ciInstanceKlass::replay_name() const {
716   return CURRENT_ENV->replay_name(get_instanceKlass());
717 }
718 
719 void ciInstanceKlass::dump_replay_instanceKlass(outputStream* out, InstanceKlass* ik) {
720   if (ik->is_hidden()) {
721     const char *name = CURRENT_ENV->dyno_name(ik);
722     if (name != NULL) {
723       out->print_cr("instanceKlass %s # %s", name, ik->name()->as_quoted_ascii());
724     } else {
725       out->print_cr("# instanceKlass %s", ik->name()->as_quoted_ascii());
726     }
727   } else {
728     out->print_cr("instanceKlass %s", ik->name()->as_quoted_ascii());
729   }
730 }
731 
732 void ciInstanceKlass::dump_replay_data(outputStream* out) {
733   ResourceMark rm;
734 
735   InstanceKlass* ik = get_instanceKlass();
736   ConstantPool*  cp = ik->constants();
737 
738   // Try to record related loaded classes
739   Klass* sub = ik->subklass();
740   while (sub != NULL) {
741     if (sub->is_instance_klass()) {
742       InstanceKlass *isub = InstanceKlass::cast(sub);
743       dump_replay_instanceKlass(out, isub);
744     }
745     sub = sub->next_sibling();
746   }
747 
748   // Dump out the state of the constant pool tags.  During replay the
749   // tags will be validated for things which shouldn't change and
750   // classes will be resolved if the tags indicate that they were
751   // resolved at compile time.
752   const char *name = replay_name();
753   out->print("ciInstanceKlass %s %d %d %d", name,
754              is_linked(), is_initialized(), cp->length());
755   for (int index = 1; index < cp->length(); index++) {
756     out->print(" %d", cp->tags()->at(index));
757   }
758   out->cr();
759   if (is_initialized()) {
760     //  Dump out the static final fields in case the compilation relies
761     //  on their value for correct replay.
762     StaticFinalFieldPrinter sffp(out, name);
763     ik->do_local_static_fields(&sffp);
764   }
765 }
766 
767 #ifdef ASSERT
768 bool ciInstanceKlass::debug_final_field_at(int offset) {
769   GUARDED_VM_ENTRY(
770     InstanceKlass* ik = get_instanceKlass();
771     fieldDescriptor fd;
772     if (ik->find_field_from_offset(offset, false, &fd)) {
773       return fd.is_final();
774     }
775   );
776   return false;
777 }
778 
779 bool ciInstanceKlass::debug_stable_field_at(int offset) {
780   GUARDED_VM_ENTRY(
781     InstanceKlass* ik = get_instanceKlass();
782     fieldDescriptor fd;
783     if (ik->find_field_from_offset(offset, false, &fd)) {
784       return fd.is_stable();
785     }
786   );
787   return false;
788 }
789 #endif