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/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 _trust_final_fields = ik->trust_final_fields();
69 _nonstatic_fields = nullptr; // initialized lazily by compute_nonstatic_fields:
70 _has_injected_fields = -1;
71 _implementor = nullptr; // we will fill these lazily
72 _transitive_interfaces = nullptr;
73
74 // Ensure that the metadata wrapped by the ciMetadata is kept alive by GC.
75 // This is primarily useful for metadata which is considered as weak roots
76 // by the GC but need to be strong roots if reachable from a current compilation.
77 // InstanceKlass are created for both weak and strong metadata. Ensuring this metadata
78 // alive covers the cases where there are weak roots without performance cost.
79 oop holder = ik->klass_holder();
80 if (ik->class_loader_data()->has_class_mirror_holder()) {
81 // Though ciInstanceKlass records class loader oop, it's not enough to keep
82 // non-strong hidden classes alive (loader == nullptr). Klass holder should
83 // be used instead. It is enough to record a ciObject, since cached elements are never removed
84 // during ciObjectFactory lifetime. ciObjectFactory itself is created for
85 // every compilation and lives for the whole duration of the compilation.
86 assert(holder != nullptr, "holder of hidden class is the mirror which is never null");
87 (void)CURRENT_ENV->get_object(holder);
88 }
89
90 JavaThread *thread = JavaThread::current();
91 if (ciObjectFactory::is_initialized()) {
98 }
99
100 _has_trusted_loader = compute_has_trusted_loader();
101
102 // Lazy fields get filled in only upon request.
103 _super = nullptr;
104 _java_mirror = nullptr;
105
106 if (is_shared()) {
107 if (k != vmClasses::Object_klass()) {
108 super();
109 }
110 //compute_nonstatic_fields(); // done outside of constructor
111 }
112
113 _field_cache = nullptr;
114 }
115
116 // Version for unloaded classes:
117 ciInstanceKlass::ciInstanceKlass(ciSymbol* name,
118 jobject loader)
119 : ciKlass(name, T_OBJECT)
120 {
121 assert(name->char_at(0) != JVM_SIGNATURE_ARRAY, "not an instance klass");
122 _init_state = (InstanceKlass::ClassState)0;
123 _has_nonstatic_fields = false;
124 _nonstatic_fields = nullptr;
125 _has_injected_fields = -1;
126 _is_hidden = false;
127 _is_record = false;
128 _loader = loader;
129 _is_shared = false;
130 _super = nullptr;
131 _java_mirror = nullptr;
132 _field_cache = nullptr;
133 _has_trusted_loader = compute_has_trusted_loader();
134 }
135
136
137
138 // ------------------------------------------------------------------
139 // ciInstanceKlass::compute_shared_is_initialized
140 void ciInstanceKlass::compute_shared_init_state() {
141 GUARDED_VM_ENTRY(
142 InstanceKlass* ik = get_instanceKlass();
143 _init_state = ik->init_state();
144 )
302 if (name()->index_of_at(len+1, "/", 1) >= 0)
303 return false;
304
305 return true;
306 }
307
308 // ------------------------------------------------------------------
309 // ciInstanceKlass::print_impl
310 //
311 // Implementation of the print method.
312 void ciInstanceKlass::print_impl(outputStream* st) {
313 ciKlass::print_impl(st);
314 GUARDED_VM_ENTRY(st->print(" loader=" INTPTR_FORMAT, p2i(loader()));)
315 if (is_loaded()) {
316 st->print(" initialized=%s finalized=%s subklass=%s size=%d flags=",
317 bool_to_str(is_initialized()),
318 bool_to_str(has_finalizer()),
319 bool_to_str(has_subklass()),
320 layout_helper());
321
322 _flags.print_klass_flags();
323
324 if (_super) {
325 st->print(" super=");
326 _super->print_name();
327 }
328 if (_java_mirror) {
329 st->print(" mirror=PRESENT");
330 }
331 }
332 }
333
334 // ------------------------------------------------------------------
335 // ciInstanceKlass::super
336 //
337 // Get the superklass of this klass.
338 ciInstanceKlass* ciInstanceKlass::super() {
339 assert(is_loaded(), "must be loaded");
340 if (_super == nullptr && !is_java_lang_Object()) {
341 GUARDED_VM_ENTRY(
342 Klass* super_klass = get_instanceKlass()->super();
343 _super = CURRENT_ENV->get_instance_klass(super_klass);
344 )
345 }
346 return _super;
377 return CURRENT_THREAD_ENV->get_instance_klass(up);
378 }
379
380 // ------------------------------------------------------------------
381 // ciInstanceKlass::has_finalizable_subclass
382 bool ciInstanceKlass::has_finalizable_subclass() {
383 if (!is_loaded()) return true;
384 VM_ENTRY_MARK;
385 return Dependencies::find_finalizable_subclass(get_instanceKlass()) != nullptr;
386 }
387
388 // ------------------------------------------------------------------
389 // ciInstanceKlass::contains_field_offset
390 bool ciInstanceKlass::contains_field_offset(int offset) {
391 VM_ENTRY_MARK;
392 return get_instanceKlass()->contains_field_offset(offset);
393 }
394
395 ciField* ciInstanceKlass::get_nonstatic_field_by_offset(const int field_offset) {
396 for (int i = 0, len = nof_nonstatic_fields(); i < len; i++) {
397 ciField* field = _nonstatic_fields->at(i);
398 int field_off = field->offset_in_bytes();
399 if (field_off == field_offset)
400 return field;
401 }
402 return nullptr;
403 }
404
405 // ------------------------------------------------------------------
406 // ciInstanceKlass::get_field_by_offset
407 ciField* ciInstanceKlass::get_field_by_offset(int field_offset, bool is_static) {
408 if (!is_static) {
409 return get_nonstatic_field_by_offset(field_offset);
410 }
411 VM_ENTRY_MARK;
412 InstanceKlass* k = get_instanceKlass();
413 fieldDescriptor fd;
414 if (!k->find_field_from_offset(field_offset, is_static, &fd)) {
415 return nullptr;
416 }
417 ciField* field = new (CURRENT_THREAD_ENV->arena()) ciField(&fd);
418 return field;
419 }
420
421 // ------------------------------------------------------------------
422 // ciInstanceKlass::get_field_by_name
423 ciField* ciInstanceKlass::get_field_by_name(ciSymbol* name, ciSymbol* signature, bool is_static) {
424 VM_ENTRY_MARK;
425 InstanceKlass* k = get_instanceKlass();
426 fieldDescriptor fd;
427 Klass* def = k->find_field(name->get_symbol(), signature->get_symbol(), is_static, &fd);
428 if (def == nullptr) {
429 return nullptr;
430 }
431 ciField* field = new (CURRENT_THREAD_ENV->arena()) ciField(&fd);
432 return field;
433 }
434
435 // This is essentially a shortcut for:
436 // get_field_by_offset(field_offset, is_static)->layout_type()
437 // except this does not require allocating memory for a new ciField
438 BasicType ciInstanceKlass::get_field_type_by_offset(const int field_offset, const bool is_static) {
439 if (!is_static) {
440 ciField* field = get_nonstatic_field_by_offset(field_offset);
441 return field != nullptr ? field->layout_type() : T_ILLEGAL;
442 }
443
444 // Avoid allocating a new ciField by obtaining the field type directly
445 VM_ENTRY_MARK;
446 InstanceKlass* k = get_instanceKlass();
447 fieldDescriptor fd;
448 if (!k->find_field_from_offset(field_offset, is_static, &fd)) {
449 return T_ILLEGAL;
450 }
451
452 // Reproduce the behavior of ciField::layout_type
453 BasicType field_type = fd.field_type();
454 if (is_reference_type(field_type)) {
455 return T_OBJECT;
456 }
457 return type2field[make(field_type)->basic_type()];
458 }
459
460 // ------------------------------------------------------------------
461 // ciInstanceKlass::compute_nonstatic_fields
462 int ciInstanceKlass::compute_nonstatic_fields() {
463 assert(is_loaded(), "must be loaded");
464
465 if (_nonstatic_fields != nullptr)
466 return _nonstatic_fields->length();
467
468 if (!has_nonstatic_fields()) {
469 Arena* arena = CURRENT_ENV->arena();
470 _nonstatic_fields = new (arena) GrowableArray<ciField*>(arena, 0, 0, nullptr);
471 return 0;
472 }
473 assert(!is_java_lang_Object(), "bootstrap OK");
474
475 ciInstanceKlass* super = this->super();
476 GrowableArray<ciField*>* super_fields = nullptr;
477 if (super != nullptr && super->has_nonstatic_fields()) {
478 int super_flen = super->nof_nonstatic_fields();
479 super_fields = super->_nonstatic_fields;
480 assert(super_flen == 0 || super_fields != nullptr, "first get nof_fields");
481 }
482
483 GrowableArray<ciField*>* fields = nullptr;
484 GUARDED_VM_ENTRY({
485 fields = compute_nonstatic_fields_impl(super_fields);
486 });
487
488 if (fields == nullptr) {
489 // This can happen if this class (java.lang.Class) has invisible fields.
490 if (super_fields != nullptr) {
491 _nonstatic_fields = super_fields;
492 return super_fields->length();
493 } else {
494 return 0;
495 }
496 }
497
498 int flen = fields->length();
499
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 = nullptr;
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 nullptr; // return nothing if none are locally declared
520 }
521 if (super_fields != nullptr) {
522 flen += super_fields->length();
523 }
524 fields = new (arena) GrowableArray<ciField*>(arena, flen, 0, nullptr);
525 if (super_fields != nullptr) {
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() != nullptr && super()->has_injected_fields()) {
555 has_injected_fields = 1;
556 } else {
628 } else {
629 // Go into the VM to fetch the implementor.
630 VM_ENTRY_MARK;
631 InstanceKlass* ik = get_instanceKlass();
632 Klass* implk = ik->implementor();
633 if (implk != nullptr) {
634 if (implk == ik) {
635 // More than one implementors. Use 'this' in this case.
636 impl = this;
637 } else {
638 impl = CURRENT_THREAD_ENV->get_instance_klass(implk);
639 }
640 }
641 }
642 // Memoize this result.
643 _implementor = impl;
644 }
645 return impl;
646 }
647
648 // Utility class for printing of the contents of the static fields for
649 // use by compilation replay. It only prints out the information that
650 // could be consumed by the compiler, so for primitive types it prints
651 // out the actual value. For Strings it's the actual string value.
652 // For array types it it's first level array size since that's the
653 // only value which statically unchangeable. For all other reference
654 // types it simply prints out the dynamic type.
655
656 class StaticFinalFieldPrinter : public FieldClosure {
657 outputStream* _out;
658 const char* _holder;
659 public:
660 StaticFinalFieldPrinter(outputStream* out, const char* holder) :
661 _out(out),
662 _holder(holder) {
663 }
664 void do_field(fieldDescriptor* fd) {
665 if (fd->is_final() && !fd->has_initial_value()) {
666 ResourceMark rm;
667 oop mirror = fd->field_holder()->java_mirror();
668 _out->print("staticfield %s %s %s ", _holder, fd->name()->as_quoted_ascii(), fd->signature()->as_quoted_ascii());
669 BasicType field_type = fd->field_type();
670 switch (field_type) {
671 case T_BYTE: _out->print_cr("%d", mirror->byte_field(fd->offset())); break;
672 case T_BOOLEAN: _out->print_cr("%d", mirror->bool_field(fd->offset())); break;
673 case T_SHORT: _out->print_cr("%d", mirror->short_field(fd->offset())); break;
674 case T_CHAR: _out->print_cr("%d", mirror->char_field(fd->offset())); break;
675 case T_INT: _out->print_cr("%d", mirror->int_field(fd->offset())); break;
676 case T_LONG: _out->print_cr(INT64_FORMAT, (int64_t)(mirror->long_field(fd->offset()))); break;
677 case T_FLOAT: {
678 float f = mirror->float_field(fd->offset());
679 _out->print_cr("%d", *(int*)&f);
680 break;
681 }
682 case T_DOUBLE: {
683 double d = mirror->double_field(fd->offset());
684 _out->print_cr(INT64_FORMAT, *(int64_t*)&d);
685 break;
686 }
687 case T_ARRAY: // fall-through
688 case T_OBJECT: {
689 oop value = mirror->obj_field_acquire(fd->offset());
690 if (value == nullptr) {
691 if (field_type == T_ARRAY) {
692 _out->print("%d", -1);
693 }
694 _out->cr();
695 } else if (value->is_instance()) {
696 assert(field_type == T_OBJECT, "");
697 if (value->is_a(vmClasses::String_klass())) {
698 const char* ascii_value = java_lang_String::as_quoted_ascii(value);
699 _out->print_cr("\"%s\"", (ascii_value != nullptr) ? ascii_value : "");
700 } else {
701 const char* klass_name = value->klass()->name()->as_quoted_ascii();
702 _out->print_cr("%s", klass_name);
703 }
704 } else if (value->is_array()) {
705 typeArrayOop ta = (typeArrayOop)value;
706 _out->print("%d", ta->length());
707 if (value->is_objArray()) {
708 objArrayOop oa = (objArrayOop)value;
709 const char* klass_name = value->klass()->name()->as_quoted_ascii();
710 _out->print(" %s", klass_name);
711 }
712 _out->cr();
713 } else {
714 ShouldNotReachHere();
715 }
716 break;
717 }
718 default:
719 ShouldNotReachHere();
720 }
721 }
722 }
723 };
724
725 const char *ciInstanceKlass::replay_name() const {
726 return CURRENT_ENV->replay_name(get_instanceKlass());
727 }
728
729 void ciInstanceKlass::dump_replay_instanceKlass(outputStream* out, InstanceKlass* ik) {
730 if (ik->is_hidden()) {
731 const char *name = CURRENT_ENV->dyno_name(ik);
732 if (name != nullptr) {
733 out->print_cr("instanceKlass %s # %s", name, ik->name()->as_quoted_ascii());
734 } else {
735 out->print_cr("# instanceKlass %s", ik->name()->as_quoted_ascii());
736 }
737 } else {
738 out->print_cr("instanceKlass %s", ik->name()->as_quoted_ascii());
739 }
740 }
741
742 GrowableArray<ciInstanceKlass*>* ciInstanceKlass::transitive_interfaces() const{
743 if (_transitive_interfaces == nullptr) {
|
1 /*
2 * Copyright (c) 1999, 2026, 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/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/arguments.hpp"
42 #include "runtime/fieldDescriptor.inline.hpp"
43 #include "runtime/handles.inline.hpp"
44 #include "runtime/jniHandles.inline.hpp"
45
46 // ciInstanceKlass
47 //
48 // This class represents a Klass* in the HotSpot virtual machine
49 // whose Klass part in an InstanceKlass.
50
51
52 // ------------------------------------------------------------------
53 // ciInstanceKlass::ciInstanceKlass
54 //
55 // Loaded instance klass.
56 ciInstanceKlass::ciInstanceKlass(Klass* k) :
57 ciKlass(k)
58 {
59 assert(get_Klass()->is_instance_klass(), "wrong type");
60 assert(get_instanceKlass()->is_loaded(), "must be at least loaded");
61 InstanceKlass* ik = get_instanceKlass();
62
63 AccessFlags access_flags = ik->access_flags();
64 _flags = ciFlags(access_flags);
65 _has_finalizer = ik->has_finalizer();
66 _has_subklass = flags().is_final() ? subklass_false : subklass_unknown;
67 _init_state = ik->init_state();
68 _has_nonstatic_fields = ik->has_nonstatic_fields();
69 _has_nonstatic_concrete_methods = ik->has_nonstatic_concrete_methods();
70 _is_hidden = ik->is_hidden();
71 _is_record = ik->is_record();
72 _declared_nonstatic_fields = nullptr; // initialized lazily by compute_nonstatic_fields
73 _nonstatic_fields = nullptr; // initialized lazily by compute_nonstatic_fields
74 _trust_final_fields = ik->trust_final_fields();
75 _has_injected_fields = -1;
76 _implementor = nullptr; // we will fill these lazily
77 _transitive_interfaces = nullptr;
78
79 // Ensure that the metadata wrapped by the ciMetadata is kept alive by GC.
80 // This is primarily useful for metadata which is considered as weak roots
81 // by the GC but need to be strong roots if reachable from a current compilation.
82 // InstanceKlass are created for both weak and strong metadata. Ensuring this metadata
83 // alive covers the cases where there are weak roots without performance cost.
84 oop holder = ik->klass_holder();
85 if (ik->class_loader_data()->has_class_mirror_holder()) {
86 // Though ciInstanceKlass records class loader oop, it's not enough to keep
87 // non-strong hidden classes alive (loader == nullptr). Klass holder should
88 // be used instead. It is enough to record a ciObject, since cached elements are never removed
89 // during ciObjectFactory lifetime. ciObjectFactory itself is created for
90 // every compilation and lives for the whole duration of the compilation.
91 assert(holder != nullptr, "holder of hidden class is the mirror which is never null");
92 (void)CURRENT_ENV->get_object(holder);
93 }
94
95 JavaThread *thread = JavaThread::current();
96 if (ciObjectFactory::is_initialized()) {
103 }
104
105 _has_trusted_loader = compute_has_trusted_loader();
106
107 // Lazy fields get filled in only upon request.
108 _super = nullptr;
109 _java_mirror = nullptr;
110
111 if (is_shared()) {
112 if (k != vmClasses::Object_klass()) {
113 super();
114 }
115 //compute_nonstatic_fields(); // done outside of constructor
116 }
117
118 _field_cache = nullptr;
119 }
120
121 // Version for unloaded classes:
122 ciInstanceKlass::ciInstanceKlass(ciSymbol* name,
123 jobject loader,
124 BasicType bt)
125 : ciKlass(name, bt)
126 {
127 assert(name->char_at(0) != JVM_SIGNATURE_ARRAY, "not an instance klass");
128 _init_state = (InstanceKlass::ClassState)0;
129 _has_nonstatic_fields = false;
130 _declared_nonstatic_fields = nullptr; // initialized lazily by compute_nonstatic_fields
131 _nonstatic_fields = nullptr; // initialized lazily by compute_nonstatic_fields
132 _has_injected_fields = -1;
133 _is_hidden = false;
134 _is_record = false;
135 _loader = loader;
136 _is_shared = false;
137 _super = nullptr;
138 _java_mirror = nullptr;
139 _field_cache = nullptr;
140 _has_trusted_loader = compute_has_trusted_loader();
141 }
142
143
144
145 // ------------------------------------------------------------------
146 // ciInstanceKlass::compute_shared_is_initialized
147 void ciInstanceKlass::compute_shared_init_state() {
148 GUARDED_VM_ENTRY(
149 InstanceKlass* ik = get_instanceKlass();
150 _init_state = ik->init_state();
151 )
309 if (name()->index_of_at(len+1, "/", 1) >= 0)
310 return false;
311
312 return true;
313 }
314
315 // ------------------------------------------------------------------
316 // ciInstanceKlass::print_impl
317 //
318 // Implementation of the print method.
319 void ciInstanceKlass::print_impl(outputStream* st) {
320 ciKlass::print_impl(st);
321 GUARDED_VM_ENTRY(st->print(" loader=" INTPTR_FORMAT, p2i(loader()));)
322 if (is_loaded()) {
323 st->print(" initialized=%s finalized=%s subklass=%s size=%d flags=",
324 bool_to_str(is_initialized()),
325 bool_to_str(has_finalizer()),
326 bool_to_str(has_subklass()),
327 layout_helper());
328
329 _flags.print_klass_flags(st);
330
331 if (_super) {
332 st->print(" super=");
333 _super->print_name_on(st);
334 }
335 if (_java_mirror) {
336 st->print(" mirror=PRESENT");
337 }
338 }
339 }
340
341 // ------------------------------------------------------------------
342 // ciInstanceKlass::super
343 //
344 // Get the superklass of this klass.
345 ciInstanceKlass* ciInstanceKlass::super() {
346 assert(is_loaded(), "must be loaded");
347 if (_super == nullptr && !is_java_lang_Object()) {
348 GUARDED_VM_ENTRY(
349 Klass* super_klass = get_instanceKlass()->super();
350 _super = CURRENT_ENV->get_instance_klass(super_klass);
351 )
352 }
353 return _super;
384 return CURRENT_THREAD_ENV->get_instance_klass(up);
385 }
386
387 // ------------------------------------------------------------------
388 // ciInstanceKlass::has_finalizable_subclass
389 bool ciInstanceKlass::has_finalizable_subclass() {
390 if (!is_loaded()) return true;
391 VM_ENTRY_MARK;
392 return Dependencies::find_finalizable_subclass(get_instanceKlass()) != nullptr;
393 }
394
395 // ------------------------------------------------------------------
396 // ciInstanceKlass::contains_field_offset
397 bool ciInstanceKlass::contains_field_offset(int offset) {
398 VM_ENTRY_MARK;
399 return get_instanceKlass()->contains_field_offset(offset);
400 }
401
402 ciField* ciInstanceKlass::get_nonstatic_field_by_offset(const int field_offset) {
403 for (int i = 0, len = nof_nonstatic_fields(); i < len; i++) {
404 ciField* field = nonstatic_field_at(i);
405 int field_off = field->offset_in_bytes();
406 if (field_off == field_offset) {
407 return field;
408 }
409 }
410 return nullptr;
411 }
412
413 // ------------------------------------------------------------------
414 // ciInstanceKlass::get_field_by_offset
415 ciField* ciInstanceKlass::get_field_by_offset(int field_offset, bool is_static) {
416 if (!is_static) {
417 return get_nonstatic_field_by_offset(field_offset);
418 }
419
420 VM_ENTRY_MARK;
421 InstanceKlass* k = get_instanceKlass();
422 fieldDescriptor fd;
423 if (!k->find_field_from_offset(field_offset, is_static, &fd)) {
424 return nullptr;
425 }
426 ciField* field = new (CURRENT_THREAD_ENV->arena()) ciField(&fd);
427 return field;
428 }
429
430 ciField* ciInstanceKlass::get_non_flat_field_by_offset(int field_offset) {
431 for (int i = 0, len = nof_declared_nonstatic_fields(); i < len; i++) {
432 ciField* field = declared_nonstatic_field_at(i);
433 int field_off = field->offset_in_bytes();
434 if (field_off == field_offset) {
435 return field;
436 }
437 }
438 return nullptr;
439 }
440
441 int ciInstanceKlass::field_index_by_offset(int offset) {
442 int best_offset = 0;
443 int best_index = -1;
444 // Search the field with the given offset
445 for (int i = 0; i < nof_declared_nonstatic_fields(); ++i) {
446 int field_offset = declared_nonstatic_field_at(i)->offset_in_bytes();
447 if (field_offset == offset) {
448 // Exact match
449 return i;
450 } else if (field_offset < offset && field_offset > best_offset) {
451 // No exact match. Save the index of the field with the closest offset that
452 // is smaller than the given field offset. This index corresponds to the
453 // flat field that holds the field we are looking for.
454 best_offset = field_offset;
455 best_index = i;
456 }
457 }
458 assert(best_index >= 0, "field not found");
459 assert(best_offset == offset || declared_nonstatic_field_at(best_index)->type()->is_inlinetype(), "offset should match for non-inline types");
460 return best_index;
461 }
462
463 // ------------------------------------------------------------------
464 // ciInstanceKlass::get_field_by_name
465 ciField* ciInstanceKlass::get_field_by_name(ciSymbol* name, ciSymbol* signature, bool is_static) {
466 VM_ENTRY_MARK;
467 InstanceKlass* k = get_instanceKlass();
468 fieldDescriptor fd;
469 Klass* def = k->find_field(name->get_symbol(), signature->get_symbol(), is_static, &fd);
470 if (def == nullptr) {
471 return nullptr;
472 }
473 ciField* field = new (CURRENT_THREAD_ENV->arena()) ciField(&fd);
474 return field;
475 }
476
477 const GrowableArray<ciField*> empty_field_array(0, MemTag::mtCompiler);
478
479 // This is essentially a shortcut for:
480 // get_field_by_offset(field_offset, is_static)->layout_type()
481 // except this does not require allocating memory for a new ciField
482 BasicType ciInstanceKlass::get_field_type_by_offset(const int field_offset, const bool is_static) {
483 if (!is_static) {
484 ciField* field = get_nonstatic_field_by_offset(field_offset);
485 return field != nullptr ? field->layout_type() : T_ILLEGAL;
486 }
487
488 // Avoid allocating a new ciField by obtaining the field type directly
489 VM_ENTRY_MARK;
490 InstanceKlass* k = get_instanceKlass();
491 fieldDescriptor fd;
492 if (!k->find_field_from_offset(field_offset, is_static, &fd)) {
493 return T_ILLEGAL;
494 }
495
496 // Reproduce the behavior of ciField::layout_type
497 BasicType field_type = fd.field_type();
498 if (is_reference_type(field_type)) {
499 return T_OBJECT;
500 }
501 return type2field[make(field_type)->basic_type()];
502 }
503
504 void ciInstanceKlass::compute_nonstatic_fields() {
505 assert(is_loaded(), "must be loaded");
506
507 if (_nonstatic_fields != nullptr) {
508 assert(_declared_nonstatic_fields != nullptr, "must be initialized at the same time, class %s", name()->as_utf8());
509 return;
510 }
511
512 if (!has_nonstatic_fields()) {
513 _declared_nonstatic_fields = &empty_field_array;
514 _nonstatic_fields = &empty_field_array;
515 return;
516 }
517 assert(!is_java_lang_Object(), "bootstrap OK");
518
519 ciInstanceKlass* super = this->super();
520 assert(super != nullptr, "must have a super class, current class: %s", name()->as_utf8());
521 super->compute_nonstatic_fields();
522 const GrowableArray<ciField*>* super_declared_fields = super->_declared_nonstatic_fields;;
523 const GrowableArray<ciField*>* super_fields = super->_nonstatic_fields;
524 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());
525
526 GUARDED_VM_ENTRY({
527 compute_nonstatic_fields_impl(super_declared_fields, super_fields);
528 });
529 }
530
531 void ciInstanceKlass::compute_nonstatic_fields_impl(const GrowableArray<ciField*>* super_declared_fields, const GrowableArray<ciField*>* super_fields) {
532 assert(_declared_nonstatic_fields == nullptr && _nonstatic_fields == nullptr, "initialized already");
533 ASSERT_IN_VM;
534 Arena* arena = CURRENT_ENV->arena();
535
536 InstanceKlass* this_klass = get_instanceKlass();
537 int declared_field_num = 0;
538 int field_num = 0;
539 for (JavaFieldStream fs(this_klass); !fs.done(); fs.next()) {
540 if (fs.access_flags().is_static()) {
541 continue;
542 }
543
544 declared_field_num++;
545
546 fieldDescriptor& fd = fs.field_descriptor();
547 if (fd.is_flat()) {
548 InlineKlass* k = this_klass->get_inline_type_field_klass(fd.index());
549 ciInlineKlass* vk = CURRENT_ENV->get_klass(k)->as_inline_klass();
550 field_num += vk->nof_nonstatic_fields();
551 field_num += fd.has_null_marker() ? 1 : 0;
552 } else {
553 field_num++;
554 }
555 }
556
557 GrowableArray<ciField*>* tmp_declared_fields = nullptr;
558 if (declared_field_num != 0) {
559 tmp_declared_fields = new (arena) GrowableArray<ciField*>(arena, declared_field_num + super_declared_fields->length(), 0, nullptr);
560 tmp_declared_fields->appendAll(super_declared_fields);
561 }
562
563 GrowableArray<ciField*>* tmp_fields = nullptr;
564 if (field_num != 0) {
565 tmp_fields = new (arena) GrowableArray<ciField*>(arena, field_num + super_fields->length(), 0, nullptr);
566 tmp_fields->appendAll(super_fields);
567 }
568
569 // For later assertion
570 declared_field_num += super_declared_fields->length();
571 field_num += super_fields->length();
572
573 for (JavaFieldStream fs(this_klass); !fs.done(); fs.next()) {
574 if (fs.access_flags().is_static()) {
575 continue;
576 }
577
578 fieldDescriptor& fd = fs.field_descriptor();
579 ciField* declared_field = new (arena) ciField(&fd);
580 assert(tmp_declared_fields != nullptr, "should be initialized");
581 tmp_declared_fields->append(declared_field);
582
583 if (fd.is_flat()) {
584 // Flat fields are embedded
585 Klass* k = get_instanceKlass()->get_inline_type_field_klass(fd.index());
586 ciInlineKlass* vk = CURRENT_ENV->get_klass(k)->as_inline_klass();
587 // Iterate over fields of the flat inline type and copy them to 'this'
588 for (int i = 0; i < vk->nof_nonstatic_fields(); ++i) {
589 assert(tmp_fields != nullptr, "should be initialized");
590 tmp_fields->append(new (arena) ciField(declared_field, vk->nonstatic_field_at(i)));
591 }
592 if (fd.has_null_marker()) {
593 assert(tmp_fields != nullptr, "should be initialized");
594 tmp_fields->append(new (arena) ciField(declared_field));
595 }
596 } else {
597 assert(tmp_fields != nullptr, "should be initialized");
598 tmp_fields->append(declared_field);
599 }
600 }
601
602 // Now sort them by offset, ascending. In principle, they could mix with superclass fields.
603 if (tmp_declared_fields != nullptr) {
604 assert(tmp_declared_fields->length() == declared_field_num, "sanity check failed for class: %s, number of declared fields: %d, expected: %d",
605 name()->as_utf8(), tmp_declared_fields->length(), declared_field_num);
606 _declared_nonstatic_fields = tmp_declared_fields;
607 } else {
608 _declared_nonstatic_fields = super_declared_fields;
609 }
610
611 if (tmp_fields != nullptr) {
612 assert(tmp_fields->length() == field_num, "sanity check failed for class: %s, number of fields: %d, expected: %d",
613 name()->as_utf8(), tmp_fields->length(), field_num);
614 _nonstatic_fields = tmp_fields;
615 } else {
616 _nonstatic_fields = super_fields;
617 }
618 }
619
620 bool ciInstanceKlass::compute_injected_fields_helper() {
621 ASSERT_IN_VM;
622 InstanceKlass* k = get_instanceKlass();
623
624 for (InternalFieldStream fs(k); !fs.done(); fs.next()) {
625 if (fs.access_flags().is_static()) continue;
626 return true;
627 }
628 return false;
629 }
630
631 void ciInstanceKlass::compute_injected_fields() {
632 assert(is_loaded(), "must be loaded");
633
634 int has_injected_fields = 0;
635 if (super() != nullptr && super()->has_injected_fields()) {
636 has_injected_fields = 1;
637 } else {
709 } else {
710 // Go into the VM to fetch the implementor.
711 VM_ENTRY_MARK;
712 InstanceKlass* ik = get_instanceKlass();
713 Klass* implk = ik->implementor();
714 if (implk != nullptr) {
715 if (implk == ik) {
716 // More than one implementors. Use 'this' in this case.
717 impl = this;
718 } else {
719 impl = CURRENT_THREAD_ENV->get_instance_klass(implk);
720 }
721 }
722 }
723 // Memoize this result.
724 _implementor = impl;
725 }
726 return impl;
727 }
728
729 bool ciInstanceKlass::can_be_inline_klass(bool is_exact) {
730 if (!Arguments::is_valhalla_enabled()) {
731 return false;
732 }
733 if (!is_loaded() || is_inlinetype()) {
734 // Not loaded or known to be an inline klass
735 return true;
736 }
737 if (!is_exact) {
738 // Not exact, check if this is a valid super for an inline klass
739 GUARDED_VM_ENTRY(
740 return !get_instanceKlass()->access_flags().is_identity_class() || is_java_lang_Object();
741 )
742 }
743 return false;
744 }
745
746 // Utility class for printing of the contents of the static fields for
747 // use by compilation replay. It only prints out the information that
748 // could be consumed by the compiler, so for primitive types it prints
749 // out the actual value. For Strings it's the actual string value.
750 // For array types it it's first level array size since that's the
751 // only value which statically unchangeable. For all other reference
752 // types it simply prints out the dynamic type.
753
754 class StaticFieldPrinter : public FieldClosure {
755 protected:
756 outputStream* _out;
757 public:
758 StaticFieldPrinter(outputStream* out) :
759 _out(out) {
760 }
761 void do_field_helper(fieldDescriptor* fd, oop obj, bool is_flat);
762 };
763
764 class StaticFinalFieldPrinter : public StaticFieldPrinter {
765 const char* _holder;
766 public:
767 StaticFinalFieldPrinter(outputStream* out, const char* holder) :
768 StaticFieldPrinter(out), _holder(holder) {
769 }
770 void do_field(fieldDescriptor* fd) {
771 if (fd->is_final() && !fd->has_initial_value()) {
772 ResourceMark rm;
773 InstanceKlass* holder = fd->field_holder();
774 oop mirror = holder->java_mirror();
775 _out->print("staticfield %s %s ", _holder, fd->name()->as_quoted_ascii());
776 BasicType bt = fd->field_type();
777 if (bt != T_OBJECT && bt != T_ARRAY) {
778 _out->print("%s ", fd->signature()->as_quoted_ascii());
779 }
780 do_field_helper(fd, mirror, false);
781 _out->cr();
782 }
783 }
784 };
785
786 class InlineTypeFieldPrinter : public StaticFieldPrinter {
787 oop _obj;
788 public:
789 InlineTypeFieldPrinter(outputStream* out, oop obj) :
790 StaticFieldPrinter(out), _obj(obj) {
791 }
792 void do_field(fieldDescriptor* fd) {
793 do_field_helper(fd, _obj, true);
794 _out->print(" ");
795 }
796 };
797
798 void StaticFieldPrinter::do_field_helper(fieldDescriptor* fd, oop mirror, bool is_flat) {
799 BasicType field_type = fd->field_type();
800 switch (field_type) {
801 case T_BYTE: _out->print("%d", mirror->byte_field(fd->offset())); break;
802 case T_BOOLEAN: _out->print("%d", mirror->bool_field(fd->offset())); break;
803 case T_SHORT: _out->print("%d", mirror->short_field(fd->offset())); break;
804 case T_CHAR: _out->print("%d", mirror->char_field(fd->offset())); break;
805 case T_INT: _out->print("%d", mirror->int_field(fd->offset())); break;
806 case T_LONG: _out->print(INT64_FORMAT, (int64_t)(mirror->long_field(fd->offset()))); break;
807 case T_FLOAT: {
808 float f = mirror->float_field(fd->offset());
809 _out->print("%d", *(int*)&f);
810 break;
811 }
812 case T_DOUBLE: {
813 double d = mirror->double_field(fd->offset());
814 _out->print(INT64_FORMAT, *(int64_t*)&d);
815 break;
816 }
817 case T_ARRAY: // fall-through
818 case T_OBJECT:
819 if (!fd->is_null_free_inline_type()) {
820 _out->print("%s ", fd->signature()->as_quoted_ascii());
821 oop value = mirror->obj_field_acquire(fd->offset());
822 if (value == nullptr) {
823 if (field_type == T_ARRAY) {
824 _out->print("%d", -1);
825 }
826 _out->cr();
827 } else if (value->is_instance()) {
828 assert(field_type == T_OBJECT, "");
829 if (value->is_a(vmClasses::String_klass())) {
830 const char* ascii_value = java_lang_String::as_quoted_ascii(value);
831 _out->print("\"%s\"", (ascii_value != nullptr) ? ascii_value : "");
832 } else {
833 const char* klass_name = value->klass()->name()->as_quoted_ascii();
834 _out->print("%s", klass_name);
835 }
836 } else if (value->is_array()) {
837 typeArrayOop ta = (typeArrayOop)value;
838 _out->print("%d", ta->length());
839 if (value->is_objArray() || value->is_flatArray()) {
840 objArrayOop oa = (objArrayOop)value;
841 const char* klass_name = value->klass()->name()->as_quoted_ascii();
842 _out->print(" %s", klass_name);
843 }
844 } else {
845 ShouldNotReachHere();
846 }
847 break;
848 } else {
849 // handling of null free inline type
850 ResetNoHandleMark rnhm;
851 Thread* THREAD = Thread::current();
852 SignatureStream ss(fd->signature(), false);
853 Symbol* name = ss.as_symbol();
854 assert(!HAS_PENDING_EXCEPTION, "can resolve klass?");
855 InstanceKlass* holder = fd->field_holder();
856 InstanceKlass* k = SystemDictionary::find_instance_klass(THREAD, name,
857 Handle(THREAD, holder->class_loader()));
858 guarantee(k != nullptr && !HAS_PENDING_EXCEPTION, "can resolve klass?");
859 InlineKlass* vk = InlineKlass::cast(k);
860 oop obj;
861 if (is_flat) {
862 int field_offset = fd->offset() - vk->payload_offset();
863 obj = cast_to_oop(cast_from_oop<address>(mirror) + field_offset);
864 } else {
865 obj = mirror->obj_field_acquire(fd->offset());
866 }
867 InlineTypeFieldPrinter print_field(_out, obj);
868 vk->do_nonstatic_fields(&print_field);
869 break;
870 }
871 default:
872 ShouldNotReachHere();
873 }
874 }
875
876 const char *ciInstanceKlass::replay_name() const {
877 return CURRENT_ENV->replay_name(get_instanceKlass());
878 }
879
880 void ciInstanceKlass::dump_replay_instanceKlass(outputStream* out, InstanceKlass* ik) {
881 if (ik->is_hidden()) {
882 const char *name = CURRENT_ENV->dyno_name(ik);
883 if (name != nullptr) {
884 out->print_cr("instanceKlass %s # %s", name, ik->name()->as_quoted_ascii());
885 } else {
886 out->print_cr("# instanceKlass %s", ik->name()->as_quoted_ascii());
887 }
888 } else {
889 out->print_cr("instanceKlass %s", ik->name()->as_quoted_ascii());
890 }
891 }
892
893 GrowableArray<ciInstanceKlass*>* ciInstanceKlass::transitive_interfaces() const{
894 if (_transitive_interfaces == nullptr) {
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