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/fieldStreams.inline.hpp"
35 #include "oops/instanceKlass.inline.hpp"
36 #include "oops/klass.inline.hpp"
37 #include "oops/oop.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()) {
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 )
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;
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 ciField* ciInstanceKlass::get_non_static_field_by_offset(const int field_offset) {
395 for (int i = 0, len = nof_nonstatic_fields(); i < len; i++) {
396 ciField* field = _nonstatic_fields->at(i);
397 int field_off = field->offset_in_bytes();
398 if (field_off == field_offset)
399 return field;
400 }
401 return nullptr;
402 }
403
404 // ------------------------------------------------------------------
405 // ciInstanceKlass::get_field_by_offset
406 ciField* ciInstanceKlass::get_field_by_offset(int field_offset, bool is_static) {
407 if (!is_static) {
408 return get_non_static_field_by_offset(field_offset);
409 }
410 VM_ENTRY_MARK;
411 InstanceKlass* k = get_instanceKlass();
412 fieldDescriptor fd;
413 if (!k->find_field_from_offset(field_offset, is_static, &fd)) {
414 return nullptr;
415 }
416 ciField* field = new (CURRENT_THREAD_ENV->arena()) ciField(&fd);
417 return field;
418 }
419
420 // ------------------------------------------------------------------
421 // ciInstanceKlass::get_field_by_name
422 ciField* ciInstanceKlass::get_field_by_name(ciSymbol* name, ciSymbol* signature, bool is_static) {
423 VM_ENTRY_MARK;
424 InstanceKlass* k = get_instanceKlass();
425 fieldDescriptor fd;
426 Klass* def = k->find_field(name->get_symbol(), signature->get_symbol(), is_static, &fd);
427 if (def == nullptr) {
428 return nullptr;
429 }
430 ciField* field = new (CURRENT_THREAD_ENV->arena()) ciField(&fd);
431 return field;
432 }
433
434 // This is essentially a shortcut for:
435 // get_field_by_offset(field_offset, is_static)->layout_type()
436 // except this does not require allocating memory for a new ciField
437 BasicType ciInstanceKlass::get_field_type_by_offset(const int field_offset, const bool is_static) {
438 if (!is_static) {
439 ciField* field = get_non_static_field_by_offset(field_offset);
440 return field != nullptr ? field->layout_type() : T_ILLEGAL;
441 }
442
443 // Avoid allocating a new ciField by obtaining the field type directly
444 VM_ENTRY_MARK;
445 InstanceKlass* k = get_instanceKlass();
446 fieldDescriptor fd;
447 if (!k->find_field_from_offset(field_offset, is_static, &fd)) {
448 return T_ILLEGAL;
449 }
450
451 // Reproduce the behavior of ciField::layout_type
452 BasicType field_type = fd.field_type();
453 if (is_reference_type(field_type)) {
454 return T_OBJECT;
455 }
456 return type2field[make(field_type)->basic_type()];
457 }
458
459 // ------------------------------------------------------------------
460 // ciInstanceKlass::compute_nonstatic_fields
461 int ciInstanceKlass::compute_nonstatic_fields() {
462 assert(is_loaded(), "must be loaded");
463
464 if (_nonstatic_fields != nullptr)
465 return _nonstatic_fields->length();
466
467 if (!has_nonstatic_fields()) {
468 Arena* arena = CURRENT_ENV->arena();
469 _nonstatic_fields = new (arena) GrowableArray<ciField*>(arena, 0, 0, nullptr);
470 return 0;
471 }
472 assert(!is_java_lang_Object(), "bootstrap OK");
473
474 ciInstanceKlass* super = this->super();
475 GrowableArray<ciField*>* super_fields = nullptr;
476 if (super != nullptr && super->has_nonstatic_fields()) {
477 int super_flen = super->nof_nonstatic_fields();
478 super_fields = super->_nonstatic_fields;
479 assert(super_flen == 0 || super_fields != nullptr, "first get nof_fields");
480 }
481
482 GrowableArray<ciField*>* fields = nullptr;
483 GUARDED_VM_ENTRY({
484 fields = compute_nonstatic_fields_impl(super_fields);
485 });
486
487 if (fields == nullptr) {
488 // This can happen if this class (java.lang.Class) has invisible fields.
489 if (super_fields != nullptr) {
490 _nonstatic_fields = super_fields;
491 return super_fields->length();
492 } else {
493 return 0;
494 }
495 }
496
497 int flen = fields->length();
498
499 _nonstatic_fields = fields;
500 return flen;
501 }
502
503 GrowableArray<ciField*>*
504 ciInstanceKlass::compute_nonstatic_fields_impl(GrowableArray<ciField*>*
505 super_fields) {
506 ASSERT_IN_VM;
507 Arena* arena = CURRENT_ENV->arena();
508 int flen = 0;
509 GrowableArray<ciField*>* fields = nullptr;
510 InstanceKlass* k = get_instanceKlass();
511 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
512 if (fs.access_flags().is_static()) continue;
513 flen += 1;
514 }
515
516 // allocate the array:
517 if (flen == 0) {
518 return nullptr; // return nothing if none are locally declared
519 }
520 if (super_fields != nullptr) {
521 flen += super_fields->length();
522 }
523 fields = new (arena) GrowableArray<ciField*>(arena, flen, 0, nullptr);
524 if (super_fields != nullptr) {
525 fields->appendAll(super_fields);
526 }
527
528 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
529 if (fs.access_flags().is_static()) continue;
530 fieldDescriptor& fd = fs.field_descriptor();
531 ciField* field = new (arena) ciField(&fd);
532 fields->append(field);
533 }
534 assert(fields->length() == flen, "sanity");
535 return fields;
536 }
537
538 bool ciInstanceKlass::compute_injected_fields_helper() {
539 ASSERT_IN_VM;
540 InstanceKlass* k = get_instanceKlass();
541
542 for (InternalFieldStream fs(k); !fs.done(); fs.next()) {
543 if (fs.access_flags().is_static()) continue;
544 return true;
545 }
546 return false;
547 }
548
549 void ciInstanceKlass::compute_injected_fields() {
550 assert(is_loaded(), "must be loaded");
551
552 int has_injected_fields = 0;
553 if (super() != nullptr && super()->has_injected_fields()) {
554 has_injected_fields = 1;
555 } else {
627 } else {
628 // Go into the VM to fetch the implementor.
629 VM_ENTRY_MARK;
630 InstanceKlass* ik = get_instanceKlass();
631 Klass* implk = ik->implementor();
632 if (implk != nullptr) {
633 if (implk == ik) {
634 // More than one implementors. Use 'this' in this case.
635 impl = this;
636 } else {
637 impl = CURRENT_THREAD_ENV->get_instance_klass(implk);
638 }
639 }
640 }
641 // Memoize this result.
642 _implementor = impl;
643 }
644 return impl;
645 }
646
647 // Utility class for printing of the contents of the static fields for
648 // use by compilation replay. It only prints out the information that
649 // could be consumed by the compiler, so for primitive types it prints
650 // out the actual value. For Strings it's the actual string value.
651 // For array types it it's first level array size since that's the
652 // only value which statically unchangeable. For all other reference
653 // types it simply prints out the dynamic type.
654
655 class StaticFinalFieldPrinter : public FieldClosure {
656 outputStream* _out;
657 const char* _holder;
658 public:
659 StaticFinalFieldPrinter(outputStream* out, const char* holder) :
660 _out(out),
661 _holder(holder) {
662 }
663 void do_field(fieldDescriptor* fd) {
664 if (fd->is_final() && !fd->has_initial_value()) {
665 ResourceMark rm;
666 oop mirror = fd->field_holder()->java_mirror();
667 _out->print("staticfield %s %s %s ", _holder, fd->name()->as_quoted_ascii(), fd->signature()->as_quoted_ascii());
668 BasicType field_type = fd->field_type();
669 switch (field_type) {
670 case T_BYTE: _out->print_cr("%d", mirror->byte_field(fd->offset())); break;
671 case T_BOOLEAN: _out->print_cr("%d", mirror->bool_field(fd->offset())); break;
672 case T_SHORT: _out->print_cr("%d", mirror->short_field(fd->offset())); break;
673 case T_CHAR: _out->print_cr("%d", mirror->char_field(fd->offset())); break;
674 case T_INT: _out->print_cr("%d", mirror->int_field(fd->offset())); break;
675 case T_LONG: _out->print_cr(INT64_FORMAT, (int64_t)(mirror->long_field(fd->offset()))); break;
676 case T_FLOAT: {
677 float f = mirror->float_field(fd->offset());
678 _out->print_cr("%d", *(int*)&f);
679 break;
680 }
681 case T_DOUBLE: {
682 double d = mirror->double_field(fd->offset());
683 _out->print_cr(INT64_FORMAT, *(int64_t*)&d);
684 break;
685 }
686 case T_ARRAY: // fall-through
687 case T_OBJECT: {
688 oop value = mirror->obj_field_acquire(fd->offset());
689 if (value == nullptr) {
690 if (field_type == T_ARRAY) {
691 _out->print("%d", -1);
692 }
693 _out->cr();
694 } else if (value->is_instance()) {
695 assert(field_type == T_OBJECT, "");
696 if (value->is_a(vmClasses::String_klass())) {
697 const char* ascii_value = java_lang_String::as_quoted_ascii(value);
698 _out->print_cr("\"%s\"", (ascii_value != nullptr) ? ascii_value : "");
699 } else {
700 const char* klass_name = value->klass()->name()->as_quoted_ascii();
701 _out->print_cr("%s", klass_name);
702 }
703 } else if (value->is_array()) {
704 typeArrayOop ta = (typeArrayOop)value;
705 _out->print("%d", ta->length());
706 if (value->is_objArray()) {
707 objArrayOop oa = (objArrayOop)value;
708 const char* klass_name = value->klass()->name()->as_quoted_ascii();
709 _out->print(" %s", klass_name);
710 }
711 _out->cr();
712 } else {
713 ShouldNotReachHere();
714 }
715 break;
716 }
717 default:
718 ShouldNotReachHere();
719 }
720 }
721 }
722 };
723
724 const char *ciInstanceKlass::replay_name() const {
725 return CURRENT_ENV->replay_name(get_instanceKlass());
726 }
727
728 void ciInstanceKlass::dump_replay_instanceKlass(outputStream* out, InstanceKlass* ik) {
729 if (ik->is_hidden()) {
730 const char *name = CURRENT_ENV->dyno_name(ik);
731 if (name != nullptr) {
732 out->print_cr("instanceKlass %s # %s", name, ik->name()->as_quoted_ascii());
733 } else {
734 out->print_cr("# instanceKlass %s", ik->name()->as_quoted_ascii());
735 }
736 } else {
737 out->print_cr("instanceKlass %s", ik->name()->as_quoted_ascii());
738 }
739 }
740
741 GrowableArray<ciInstanceKlass*>* ciInstanceKlass::transitive_interfaces() const{
742 if (_transitive_interfaces == nullptr) {
|
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/ciInlineKlass.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/systemDictionary.hpp"
32 #include "classfile/vmClasses.hpp"
33 #include "memory/allocation.hpp"
34 #include "memory/allocation.inline.hpp"
35 #include "memory/resourceArea.hpp"
36 #include "oops/fieldStreams.inline.hpp"
37 #include "oops/inlineKlass.inline.hpp"
38 #include "oops/instanceKlass.inline.hpp"
39 #include "oops/klass.inline.hpp"
40 #include "oops/oop.inline.hpp"
41 #include "runtime/fieldDescriptor.inline.hpp"
42 #include "runtime/handles.inline.hpp"
43 #include "runtime/jniHandles.inline.hpp"
44
45 // ciInstanceKlass
46 //
47 // This class represents a Klass* in the HotSpot virtual machine
48 // whose Klass part in an InstanceKlass.
49
50
51 // ------------------------------------------------------------------
52 // ciInstanceKlass::ciInstanceKlass
53 //
54 // Loaded instance klass.
55 ciInstanceKlass::ciInstanceKlass(Klass* k) :
56 ciKlass(k)
57 {
58 assert(get_Klass()->is_instance_klass(), "wrong type");
59 assert(get_instanceKlass()->is_loaded(), "must be at least loaded");
60 InstanceKlass* ik = get_instanceKlass();
61
62 AccessFlags access_flags = ik->access_flags();
63 _flags = ciFlags(access_flags);
64 _has_finalizer = ik->has_finalizer();
65 _has_subklass = flags().is_final() ? subklass_false : subklass_unknown;
66 _init_state = ik->init_state();
67 _has_nonstatic_fields = ik->has_nonstatic_fields();
68 _has_nonstatic_concrete_methods = ik->has_nonstatic_concrete_methods();
69 _is_hidden = ik->is_hidden();
70 _is_record = ik->is_record();
71 _declared_nonstatic_fields = nullptr; // initialized lazily by compute_nonstatic_fields
72 _nonstatic_fields = nullptr; // initialized lazily by compute_nonstatic_fields
73 _has_injected_fields = -1;
74 _implementor = nullptr; // we will fill these lazily
75 _transitive_interfaces = nullptr;
76
77 // Ensure that the metadata wrapped by the ciMetadata is kept alive by GC.
78 // This is primarily useful for metadata which is considered as weak roots
79 // by the GC but need to be strong roots if reachable from a current compilation.
80 // InstanceKlass are created for both weak and strong metadata. Ensuring this metadata
81 // alive covers the cases where there are weak roots without performance cost.
82 oop holder = ik->klass_holder();
83 if (ik->class_loader_data()->has_class_mirror_holder()) {
84 // Though ciInstanceKlass records class loader oop, it's not enough to keep
85 // non-strong hidden classes alive (loader == nullptr). Klass holder should
86 // be used instead. It is enough to record a ciObject, since cached elements are never removed
87 // during ciObjectFactory lifetime. ciObjectFactory itself is created for
88 // every compilation and lives for the whole duration of the compilation.
89 assert(holder != nullptr, "holder of hidden class is the mirror which is never null");
90 (void)CURRENT_ENV->get_object(holder);
91 }
92
93 JavaThread *thread = JavaThread::current();
94 if (ciObjectFactory::is_initialized()) {
101 }
102
103 _has_trusted_loader = compute_has_trusted_loader();
104
105 // Lazy fields get filled in only upon request.
106 _super = nullptr;
107 _java_mirror = nullptr;
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 = nullptr;
117 }
118
119 // Version for unloaded classes:
120 ciInstanceKlass::ciInstanceKlass(ciSymbol* name,
121 jobject loader,
122 BasicType bt)
123 : ciKlass(name, bt)
124 {
125 assert(name->char_at(0) != JVM_SIGNATURE_ARRAY, "not an instance klass");
126 _init_state = (InstanceKlass::ClassState)0;
127 _has_nonstatic_fields = false;
128 _declared_nonstatic_fields = nullptr; // initialized lazily by compute_nonstatic_fields
129 _nonstatic_fields = nullptr; // initialized lazily by compute_nonstatic_fields
130 _has_injected_fields = -1;
131 _is_hidden = false;
132 _is_record = false;
133 _loader = loader;
134 _is_shared = false;
135 _super = nullptr;
136 _java_mirror = nullptr;
137 _field_cache = nullptr;
138 _has_trusted_loader = compute_has_trusted_loader();
139 }
140
141
142
143 // ------------------------------------------------------------------
144 // ciInstanceKlass::compute_shared_is_initialized
145 void ciInstanceKlass::compute_shared_init_state() {
146 GUARDED_VM_ENTRY(
147 InstanceKlass* ik = get_instanceKlass();
148 _init_state = ik->init_state();
149 )
307 if (name()->index_of_at(len+1, "/", 1) >= 0)
308 return false;
309
310 return true;
311 }
312
313 // ------------------------------------------------------------------
314 // ciInstanceKlass::print_impl
315 //
316 // Implementation of the print method.
317 void ciInstanceKlass::print_impl(outputStream* st) {
318 ciKlass::print_impl(st);
319 GUARDED_VM_ENTRY(st->print(" loader=" INTPTR_FORMAT, p2i(loader()));)
320 if (is_loaded()) {
321 st->print(" initialized=%s finalized=%s subklass=%s size=%d flags=",
322 bool_to_str(is_initialized()),
323 bool_to_str(has_finalizer()),
324 bool_to_str(has_subklass()),
325 layout_helper());
326
327 _flags.print_klass_flags(st);
328
329 if (_super) {
330 st->print(" super=");
331 _super->print_name_on(st);
332 }
333 if (_java_mirror) {
334 st->print(" mirror=PRESENT");
335 }
336 }
337 }
338
339 // ------------------------------------------------------------------
340 // ciInstanceKlass::super
341 //
342 // Get the superklass of this klass.
343 ciInstanceKlass* ciInstanceKlass::super() {
344 assert(is_loaded(), "must be loaded");
345 if (_super == nullptr && !is_java_lang_Object()) {
346 GUARDED_VM_ENTRY(
347 Klass* super_klass = get_instanceKlass()->super();
348 _super = CURRENT_ENV->get_instance_klass(super_klass);
349 )
350 }
351 return _super;
382 return CURRENT_THREAD_ENV->get_instance_klass(up);
383 }
384
385 // ------------------------------------------------------------------
386 // ciInstanceKlass::has_finalizable_subclass
387 bool ciInstanceKlass::has_finalizable_subclass() {
388 if (!is_loaded()) return true;
389 VM_ENTRY_MARK;
390 return Dependencies::find_finalizable_subclass(get_instanceKlass()) != nullptr;
391 }
392
393 // ------------------------------------------------------------------
394 // ciInstanceKlass::contains_field_offset
395 bool ciInstanceKlass::contains_field_offset(int offset) {
396 VM_ENTRY_MARK;
397 return get_instanceKlass()->contains_field_offset(offset);
398 }
399
400 ciField* ciInstanceKlass::get_non_static_field_by_offset(const int field_offset) {
401 for (int i = 0, len = nof_nonstatic_fields(); i < len; i++) {
402 ciField* field = nonstatic_field_at(i);
403 int field_off = field->offset_in_bytes();
404 if (field_off == field_offset) {
405 return field;
406 }
407 }
408 return nullptr;
409 }
410
411 // ------------------------------------------------------------------
412 // ciInstanceKlass::get_field_by_offset
413 ciField* ciInstanceKlass::get_field_by_offset(int field_offset, bool is_static) {
414 if (!is_static) {
415 return get_non_static_field_by_offset(field_offset);
416 }
417
418 VM_ENTRY_MARK;
419 InstanceKlass* k = get_instanceKlass();
420 fieldDescriptor fd;
421 if (!k->find_field_from_offset(field_offset, is_static, &fd)) {
422 return nullptr;
423 }
424 ciField* field = new (CURRENT_THREAD_ENV->arena()) ciField(&fd);
425 return field;
426 }
427
428 ciField* ciInstanceKlass::get_non_flat_field_by_offset(int field_offset) {
429 for (int i = 0, len = nof_declared_nonstatic_fields(); i < len; i++) {
430 ciField* field = declared_nonstatic_field_at(i);
431 int field_off = field->offset_in_bytes();
432 if (field_off == field_offset) {
433 return field;
434 }
435 }
436 return nullptr;
437 }
438
439 int ciInstanceKlass::field_index_by_offset(int offset) {
440 assert(contains_field_offset(offset), "invalid field offset");
441 int best_offset = 0;
442 int best_index = -1;
443 // Search the field with the given offset
444 for (int i = 0; i < nof_declared_nonstatic_fields(); ++i) {
445 int field_offset = declared_nonstatic_field_at(i)->offset_in_bytes();
446 if (field_offset == offset) {
447 // Exact match
448 return i;
449 } else if (field_offset < offset && field_offset > best_offset) {
450 // No exact match. Save the index of the field with the closest offset that
451 // is smaller than the given field offset. This index corresponds to the
452 // flat field that holds the field we are looking for.
453 best_offset = field_offset;
454 best_index = i;
455 }
456 }
457 assert(best_index >= 0, "field not found");
458 assert(best_offset == offset || declared_nonstatic_field_at(best_index)->type()->is_inlinetype(), "offset should match for non-inline types");
459 return best_index;
460 }
461
462 // ------------------------------------------------------------------
463 // ciInstanceKlass::get_field_by_name
464 ciField* ciInstanceKlass::get_field_by_name(ciSymbol* name, ciSymbol* signature, bool is_static) {
465 VM_ENTRY_MARK;
466 InstanceKlass* k = get_instanceKlass();
467 fieldDescriptor fd;
468 Klass* def = k->find_field(name->get_symbol(), signature->get_symbol(), is_static, &fd);
469 if (def == nullptr) {
470 return nullptr;
471 }
472 ciField* field = new (CURRENT_THREAD_ENV->arena()) ciField(&fd);
473 return field;
474 }
475
476 const GrowableArray<ciField*> empty_field_array(0, MemTag::mtCompiler);
477
478 // This is essentially a shortcut for:
479 // get_field_by_offset(field_offset, is_static)->layout_type()
480 // except this does not require allocating memory for a new ciField
481 BasicType ciInstanceKlass::get_field_type_by_offset(const int field_offset, const bool is_static) {
482 if (!is_static) {
483 ciField* field = get_non_static_field_by_offset(field_offset);
484 return field != nullptr ? field->layout_type() : T_ILLEGAL;
485 }
486
487 // Avoid allocating a new ciField by obtaining the field type directly
488 VM_ENTRY_MARK;
489 InstanceKlass* k = get_instanceKlass();
490 fieldDescriptor fd;
491 if (!k->find_field_from_offset(field_offset, is_static, &fd)) {
492 return T_ILLEGAL;
493 }
494
495 // Reproduce the behavior of ciField::layout_type
496 BasicType field_type = fd.field_type();
497 if (is_reference_type(field_type)) {
498 return T_OBJECT;
499 }
500 return type2field[make(field_type)->basic_type()];
501 }
502
503 void ciInstanceKlass::compute_nonstatic_fields() {
504 assert(is_loaded(), "must be loaded");
505
506 if (_nonstatic_fields != nullptr) {
507 assert(_declared_nonstatic_fields != nullptr, "must be initialized at the same time, class %s", name()->as_utf8());
508 return;
509 }
510
511 if (!has_nonstatic_fields()) {
512 _declared_nonstatic_fields = &empty_field_array;
513 _nonstatic_fields = &empty_field_array;
514 return;
515 }
516 assert(!is_java_lang_Object(), "bootstrap OK");
517
518 ciInstanceKlass* super = this->super();
519 assert(super != nullptr, "must have a super class, current class: %s", name()->as_utf8());
520 super->compute_nonstatic_fields();
521 const GrowableArray<ciField*>* super_declared_fields = super->_declared_nonstatic_fields;;
522 const GrowableArray<ciField*>* super_fields = super->_nonstatic_fields;
523 assert(super_declared_fields != nullptr && super_fields != nullptr, "must have been initialized, current class: %s, super class: %s", name()->as_utf8(), super->name()->as_utf8());
524
525 GUARDED_VM_ENTRY({
526 compute_nonstatic_fields_impl(super_declared_fields, super_fields);
527 });
528 }
529
530 void ciInstanceKlass::compute_nonstatic_fields_impl(const GrowableArray<ciField*>* super_declared_fields, const GrowableArray<ciField*>* super_fields) {
531 assert(_declared_nonstatic_fields == nullptr && _nonstatic_fields == nullptr, "initialized already");
532 ASSERT_IN_VM;
533 Arena* arena = CURRENT_ENV->arena();
534
535 InstanceKlass* this_klass = get_instanceKlass();
536 int declared_field_num = 0;
537 int field_num = 0;
538 for (JavaFieldStream fs(this_klass); !fs.done(); fs.next()) {
539 if (fs.access_flags().is_static()) {
540 continue;
541 }
542
543 declared_field_num++;
544
545 fieldDescriptor& fd = fs.field_descriptor();
546 if (fd.is_flat()) {
547 InlineKlass* k = this_klass->get_inline_type_field_klass(fd.index());
548 ciInlineKlass* vk = CURRENT_ENV->get_klass(k)->as_inline_klass();
549 field_num += vk->nof_nonstatic_fields();
550 field_num += fd.has_null_marker() ? 1 : 0;
551 } else {
552 field_num++;
553 }
554 }
555
556 GrowableArray<ciField*>* tmp_declared_fields = nullptr;
557 if (declared_field_num != 0) {
558 tmp_declared_fields = new (arena) GrowableArray<ciField*>(arena, declared_field_num + super_declared_fields->length(), 0, nullptr);
559 tmp_declared_fields->appendAll(super_declared_fields);
560 }
561
562 GrowableArray<ciField*>* tmp_fields = nullptr;
563 if (field_num != 0) {
564 tmp_fields = new (arena) GrowableArray<ciField*>(arena, field_num + super_fields->length(), 0, nullptr);
565 tmp_fields->appendAll(super_fields);
566 }
567
568 // For later assertion
569 declared_field_num += super_declared_fields->length();
570 field_num += super_fields->length();
571
572 for (JavaFieldStream fs(this_klass); !fs.done(); fs.next()) {
573 if (fs.access_flags().is_static()) {
574 continue;
575 }
576
577 fieldDescriptor& fd = fs.field_descriptor();
578 ciField* declared_field = new (arena) ciField(&fd);
579 assert(tmp_declared_fields != nullptr, "should be initialized");
580 tmp_declared_fields->append(declared_field);
581
582 if (fd.is_flat()) {
583 // Flat fields are embedded
584 Klass* k = get_instanceKlass()->get_inline_type_field_klass(fd.index());
585 ciInlineKlass* vk = CURRENT_ENV->get_klass(k)->as_inline_klass();
586 // Iterate over fields of the flat inline type and copy them to 'this'
587 for (int i = 0; i < vk->nof_nonstatic_fields(); ++i) {
588 assert(tmp_fields != nullptr, "should be initialized");
589 tmp_fields->append(new (arena) ciField(declared_field, vk->nonstatic_field_at(i)));
590 }
591 if (fd.has_null_marker()) {
592 assert(tmp_fields != nullptr, "should be initialized");
593 tmp_fields->append(new (arena) ciField(declared_field));
594 }
595 } else {
596 assert(tmp_fields != nullptr, "should be initialized");
597 tmp_fields->append(declared_field);
598 }
599 }
600
601 // Now sort them by offset, ascending. In principle, they could mix with superclass fields.
602 if (tmp_declared_fields != nullptr) {
603 assert(tmp_declared_fields->length() == declared_field_num, "sanity check failed for class: %s, number of declared fields: %d, expected: %d",
604 name()->as_utf8(), tmp_declared_fields->length(), declared_field_num);
605 _declared_nonstatic_fields = tmp_declared_fields;
606 } else {
607 _declared_nonstatic_fields = super_declared_fields;
608 }
609
610 if (tmp_fields != nullptr) {
611 assert(tmp_fields->length() == field_num, "sanity check failed for class: %s, number of fields: %d, expected: %d",
612 name()->as_utf8(), tmp_fields->length(), field_num);
613 _nonstatic_fields = tmp_fields;
614 } else {
615 _nonstatic_fields = super_fields;
616 }
617 }
618
619 bool ciInstanceKlass::compute_injected_fields_helper() {
620 ASSERT_IN_VM;
621 InstanceKlass* k = get_instanceKlass();
622
623 for (InternalFieldStream fs(k); !fs.done(); fs.next()) {
624 if (fs.access_flags().is_static()) continue;
625 return true;
626 }
627 return false;
628 }
629
630 void ciInstanceKlass::compute_injected_fields() {
631 assert(is_loaded(), "must be loaded");
632
633 int has_injected_fields = 0;
634 if (super() != nullptr && super()->has_injected_fields()) {
635 has_injected_fields = 1;
636 } else {
708 } else {
709 // Go into the VM to fetch the implementor.
710 VM_ENTRY_MARK;
711 InstanceKlass* ik = get_instanceKlass();
712 Klass* implk = ik->implementor();
713 if (implk != nullptr) {
714 if (implk == ik) {
715 // More than one implementors. Use 'this' in this case.
716 impl = this;
717 } else {
718 impl = CURRENT_THREAD_ENV->get_instance_klass(implk);
719 }
720 }
721 }
722 // Memoize this result.
723 _implementor = impl;
724 }
725 return impl;
726 }
727
728 bool ciInstanceKlass::can_be_inline_klass(bool is_exact) {
729 if (!EnableValhalla) {
730 return false;
731 }
732 if (!is_loaded() || is_inlinetype()) {
733 // Not loaded or known to be an inline klass
734 return true;
735 }
736 if (!is_exact) {
737 // Not exact, check if this is a valid super for an inline klass
738 GUARDED_VM_ENTRY(
739 return !get_instanceKlass()->access_flags().is_identity_class() || is_java_lang_Object();
740 )
741 }
742 return false;
743 }
744
745 // Utility class for printing of the contents of the static fields for
746 // use by compilation replay. It only prints out the information that
747 // could be consumed by the compiler, so for primitive types it prints
748 // out the actual value. For Strings it's the actual string value.
749 // For array types it it's first level array size since that's the
750 // only value which statically unchangeable. For all other reference
751 // types it simply prints out the dynamic type.
752
753 class StaticFieldPrinter : public FieldClosure {
754 protected:
755 outputStream* _out;
756 public:
757 StaticFieldPrinter(outputStream* out) :
758 _out(out) {
759 }
760 void do_field_helper(fieldDescriptor* fd, oop obj, bool is_flat);
761 };
762
763 class StaticFinalFieldPrinter : public StaticFieldPrinter {
764 const char* _holder;
765 public:
766 StaticFinalFieldPrinter(outputStream* out, const char* holder) :
767 StaticFieldPrinter(out), _holder(holder) {
768 }
769 void do_field(fieldDescriptor* fd) {
770 if (fd->is_final() && !fd->has_initial_value()) {
771 ResourceMark rm;
772 InstanceKlass* holder = fd->field_holder();
773 oop mirror = holder->java_mirror();
774 _out->print("staticfield %s %s ", _holder, fd->name()->as_quoted_ascii());
775 BasicType bt = fd->field_type();
776 if (bt != T_OBJECT && bt != T_ARRAY) {
777 _out->print("%s ", fd->signature()->as_quoted_ascii());
778 }
779 do_field_helper(fd, mirror, false);
780 _out->cr();
781 }
782 }
783 };
784
785 class InlineTypeFieldPrinter : public StaticFieldPrinter {
786 oop _obj;
787 public:
788 InlineTypeFieldPrinter(outputStream* out, oop obj) :
789 StaticFieldPrinter(out), _obj(obj) {
790 }
791 void do_field(fieldDescriptor* fd) {
792 do_field_helper(fd, _obj, true);
793 _out->print(" ");
794 }
795 };
796
797 void StaticFieldPrinter::do_field_helper(fieldDescriptor* fd, oop mirror, bool is_flat) {
798 BasicType field_type = fd->field_type();
799 switch (field_type) {
800 case T_BYTE: _out->print("%d", mirror->byte_field(fd->offset())); break;
801 case T_BOOLEAN: _out->print("%d", mirror->bool_field(fd->offset())); break;
802 case T_SHORT: _out->print("%d", mirror->short_field(fd->offset())); break;
803 case T_CHAR: _out->print("%d", mirror->char_field(fd->offset())); break;
804 case T_INT: _out->print("%d", mirror->int_field(fd->offset())); break;
805 case T_LONG: _out->print(INT64_FORMAT, (int64_t)(mirror->long_field(fd->offset()))); break;
806 case T_FLOAT: {
807 float f = mirror->float_field(fd->offset());
808 _out->print("%d", *(int*)&f);
809 break;
810 }
811 case T_DOUBLE: {
812 double d = mirror->double_field(fd->offset());
813 _out->print(INT64_FORMAT, *(int64_t*)&d);
814 break;
815 }
816 case T_ARRAY: // fall-through
817 case T_OBJECT:
818 if (!fd->is_null_free_inline_type()) {
819 _out->print("%s ", fd->signature()->as_quoted_ascii());
820 oop value = mirror->obj_field_acquire(fd->offset());
821 if (value == nullptr) {
822 if (field_type == T_ARRAY) {
823 _out->print("%d", -1);
824 }
825 _out->cr();
826 } else if (value->is_instance()) {
827 assert(field_type == T_OBJECT, "");
828 if (value->is_a(vmClasses::String_klass())) {
829 const char* ascii_value = java_lang_String::as_quoted_ascii(value);
830 _out->print("\"%s\"", (ascii_value != nullptr) ? ascii_value : "");
831 } else {
832 const char* klass_name = value->klass()->name()->as_quoted_ascii();
833 _out->print("%s", klass_name);
834 }
835 } else if (value->is_array()) {
836 typeArrayOop ta = (typeArrayOop)value;
837 _out->print("%d", ta->length());
838 if (value->is_objArray() || value->is_flatArray()) {
839 objArrayOop oa = (objArrayOop)value;
840 const char* klass_name = value->klass()->name()->as_quoted_ascii();
841 _out->print(" %s", klass_name);
842 }
843 } else {
844 ShouldNotReachHere();
845 }
846 break;
847 } else {
848 // handling of null free inline type
849 ResetNoHandleMark rnhm;
850 Thread* THREAD = Thread::current();
851 SignatureStream ss(fd->signature(), false);
852 Symbol* name = ss.as_symbol();
853 assert(!HAS_PENDING_EXCEPTION, "can resolve klass?");
854 InstanceKlass* holder = fd->field_holder();
855 InstanceKlass* k = SystemDictionary::find_instance_klass(THREAD, name,
856 Handle(THREAD, holder->class_loader()));
857 assert(k != nullptr && !HAS_PENDING_EXCEPTION, "can resolve klass?");
858 InlineKlass* vk = InlineKlass::cast(k);
859 oop obj;
860 if (is_flat) {
861 int field_offset = fd->offset() - vk->payload_offset();
862 obj = cast_to_oop(cast_from_oop<address>(mirror) + field_offset);
863 } else {
864 obj = mirror->obj_field_acquire(fd->offset());
865 }
866 InlineTypeFieldPrinter print_field(_out, obj);
867 vk->do_nonstatic_fields(&print_field);
868 break;
869 }
870 default:
871 ShouldNotReachHere();
872 }
873 }
874
875 const char *ciInstanceKlass::replay_name() const {
876 return CURRENT_ENV->replay_name(get_instanceKlass());
877 }
878
879 void ciInstanceKlass::dump_replay_instanceKlass(outputStream* out, InstanceKlass* ik) {
880 if (ik->is_hidden()) {
881 const char *name = CURRENT_ENV->dyno_name(ik);
882 if (name != nullptr) {
883 out->print_cr("instanceKlass %s # %s", name, ik->name()->as_quoted_ascii());
884 } else {
885 out->print_cr("# instanceKlass %s", ik->name()->as_quoted_ascii());
886 }
887 } else {
888 out->print_cr("instanceKlass %s", ik->name()->as_quoted_ascii());
889 }
890 }
891
892 GrowableArray<ciInstanceKlass*>* ciInstanceKlass::transitive_interfaces() const{
893 if (_transitive_interfaces == nullptr) {
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