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
57 InstanceKlass* ik = get_instanceKlass();
58
59 #ifdef ASSERT
60 if (!ik->is_loaded()) {
61 ResourceMark rm;
62 ik->print_on(tty);
63 assert(false, "must be at least loaded: %s", ik->name()->as_C_string());
64 }
65 #endif // ASSERT
66
67 AccessFlags access_flags = ik->access_flags();
68 _flags = ciFlags(access_flags);
69 _has_finalizer = ik->has_finalizer();
70 _has_subklass = flags().is_final() ? subklass_false : subklass_unknown;
71 _init_state = compute_init_state(ik);
72 _has_nonstatic_fields = ik->has_nonstatic_fields();
73 _has_nonstatic_concrete_methods = ik->has_nonstatic_concrete_methods();
74 _is_hidden = ik->is_hidden();
75 _is_record = ik->is_record();
76 _trust_final_fields = ik->trust_final_fields();
77 _nonstatic_fields = nullptr; // initialized lazily by compute_nonstatic_fields:
78 _has_injected_fields = -1;
79 _implementor = nullptr; // we will fill these lazily
80 _transitive_interfaces = nullptr;
81
82 // Ensure that the metadata wrapped by the ciMetadata is kept alive by GC.
83 // This is primarily useful for metadata which is considered as weak roots
84 // by the GC but need to be strong roots if reachable from a current compilation.
85 // InstanceKlass are created for both weak and strong metadata. Ensuring this metadata
86 // alive covers the cases where there are weak roots without performance cost.
87 oop holder = ik->klass_holder();
88 if (ik->class_loader_data()->has_class_mirror_holder()) {
89 // Though ciInstanceKlass records class loader oop, it's not enough to keep
90 // non-strong hidden classes alive (loader == nullptr). Klass holder should
91 // be used instead. It is enough to record a ciObject, since cached elements are never removed
92 // during ciObjectFactory lifetime. ciObjectFactory itself is created for
93 // every compilation and lives for the whole duration of the compilation.
94 assert(holder != nullptr, "holder of hidden class is the mirror which is never null");
95 (void)CURRENT_ENV->get_object(holder);
96 }
97
98 JavaThread *thread = JavaThread::current();
99 if (ciObjectFactory::is_initialized()) {
100 _loader = JNIHandles::make_local(thread, ik->class_loader());
101 _is_shared = false;
102 } else {
103 Handle h_loader(thread, ik->class_loader());
104 _loader = JNIHandles::make_global(h_loader);
105 _is_shared = true;
106 }
107
108 _has_trusted_loader = compute_has_trusted_loader();
109
110 // Lazy fields get filled in only upon request.
111 _super = nullptr;
112 _java_mirror = nullptr;
113
114 if (is_shared()) {
115 if (k != vmClasses::Object_klass()) {
116 super();
117 }
118 //compute_nonstatic_fields(); // done outside of constructor
119 }
120
121 _field_cache = nullptr;
122 }
123
124 // Version for unloaded classes:
125 ciInstanceKlass::ciInstanceKlass(ciSymbol* name,
126 jobject loader)
127 : ciKlass(name, T_OBJECT)
128 {
129 assert(name->char_at(0) != JVM_SIGNATURE_ARRAY, "not an instance klass");
130 _init_state = (InstanceKlass::ClassState)0;
131 _has_nonstatic_fields = false;
132 _nonstatic_fields = nullptr;
133 _has_injected_fields = -1;
134 _is_hidden = false;
135 _is_record = false;
136 _loader = loader;
137 _is_shared = false;
138 _super = nullptr;
139 _java_mirror = nullptr;
140 _field_cache = nullptr;
141 _has_trusted_loader = compute_has_trusted_loader();
142 }
143
144
145
146 // ------------------------------------------------------------------
147 // ciInstanceKlass::compute_shared_is_initialized
148 InstanceKlass::ClassState ciInstanceKlass::compute_shared_init_state() {
149 GUARDED_VM_ENTRY(
150 InstanceKlass* ik = get_instanceKlass();
151 _init_state = compute_init_state(ik);
152 return _init_state;
153 )
154 }
155
156 InstanceKlass::ClassState ciInstanceKlass::compute_init_state(InstanceKlass* ik) {
157 ASSERT_IN_VM;
158 ciEnv* env = CURRENT_ENV;
159 if (env != nullptr && env->is_aot_compile()) {
160 return env->compute_init_state_for_aot_compile(ik);
161 } else {
162 return ik->init_state();
163 }
164 }
165
166 // ------------------------------------------------------------------
167 // ciInstanceKlass::compute_shared_has_subklass
168 bool ciInstanceKlass::compute_shared_has_subklass() {
169 GUARDED_VM_ENTRY(
170 InstanceKlass* ik = get_instanceKlass();
171 _has_subklass = ik->subklass() != nullptr ? subklass_true : subklass_false;
172 return _has_subklass == subklass_true;
173 )
174 }
175
176 // ------------------------------------------------------------------
177 // ciInstanceKlass::loader
178 oop ciInstanceKlass::loader() {
179 ASSERT_IN_VM;
180 return JNIHandles::resolve(_loader);
181 }
182
183 // ------------------------------------------------------------------
184 // ciInstanceKlass::loader_handle
185 jobject ciInstanceKlass::loader_handle() {
186 return _loader;
187 }
188
189 // ------------------------------------------------------------------
190 // ciInstanceKlass::field_cache
191 //
192 // Get the field cache associated with this klass.
193 ciConstantPoolCache* ciInstanceKlass::field_cache() {
194 if (is_shared()) {
195 return nullptr;
196 }
197 if (_field_cache == nullptr) {
198 assert(!is_java_lang_Object(), "Object has no fields");
199 Arena* arena = CURRENT_ENV->arena();
200 _field_cache = new (arena) ciConstantPoolCache(arena, 5);
201 }
202 return _field_cache;
203 }
204
205 // ------------------------------------------------------------------
206 // ciInstanceKlass::get_canonical_holder
207 //
208 ciInstanceKlass* ciInstanceKlass::get_canonical_holder(int offset) {
209 #ifdef ASSERT
210 if (!(offset >= 0 && offset < layout_helper_size_in_bytes())) {
211 tty->print("*** get_canonical_holder(%d) on ", offset);
212 this->print();
213 tty->print_cr(" ***");
214 };
215 assert(offset >= 0 && offset < layout_helper_size_in_bytes(), "offset must be tame");
216 #endif
217
218 if (offset < instanceOopDesc::base_offset_in_bytes()) {
219 // All header offsets belong properly to java/lang/Object.
220 return CURRENT_ENV->Object_klass();
221 }
222
223 ciInstanceKlass* self = this;
224 assert(self->is_loaded(), "must be loaded to access field info");
225 ciField* field = self->get_field_by_offset(offset, false);
226 if (field != nullptr) {
227 return field->holder();
228 } else {
229 for (;;) {
230 assert(self->is_loaded(), "must be loaded to have size");
231 ciInstanceKlass* super = self->super();
232 if (super == nullptr ||
233 super->nof_nonstatic_fields() == 0 ||
234 super->layout_helper_size_in_bytes() <= offset) {
235 return self;
236 } else {
237 self = super; // return super->get_canonical_holder(offset)
238 }
239 }
240 }
241 }
242
243 // ------------------------------------------------------------------
244 // ciInstanceKlass::is_java_lang_Object
245 //
246 // Is this klass java.lang.Object?
247 bool ciInstanceKlass::is_java_lang_Object() const {
248 return equals(CURRENT_ENV->Object_klass());
249 }
250
251 // ------------------------------------------------------------------
252 // ciInstanceKlass::uses_default_loader
253 bool ciInstanceKlass::uses_default_loader() const {
254 // Note: We do not need to resolve the handle or enter the VM
255 // in order to test null-ness.
256 return _loader == nullptr;
257 }
258
259 // ------------------------------------------------------------------
260
261 /**
262 * Return basic type of boxed value for box klass or T_OBJECT if not.
263 */
264 BasicType ciInstanceKlass::box_klass_type() const {
265 if (uses_default_loader() && is_loaded()) {
266 return vmClasses::box_klass_type(get_Klass());
267 } else {
268 return T_OBJECT;
269 }
270 }
271
272 /**
273 * Is this boxing klass?
274 */
275 bool ciInstanceKlass::is_box_klass() const {
276 return is_java_primitive(box_klass_type());
277 }
278
279 /**
280 * Is this boxed value offset?
281 */
282 bool ciInstanceKlass::is_boxed_value_offset(int offset) const {
283 BasicType bt = box_klass_type();
284 return is_java_primitive(bt) &&
285 (offset == java_lang_boxing_object::value_offset(bt));
286 }
287
288 // ------------------------------------------------------------------
289 // ciInstanceKlass::is_in_package
290 //
291 // Is this klass in the given package?
292 bool ciInstanceKlass::is_in_package(const char* packagename, int len) {
293 // To avoid class loader mischief, this test always rejects application classes.
294 if (!uses_default_loader())
295 return false;
296 GUARDED_VM_ENTRY(
297 return is_in_package_impl(packagename, len);
298 )
299 }
300
301 bool ciInstanceKlass::is_in_package_impl(const char* packagename, int len) {
302 ASSERT_IN_VM;
303
304 // If packagename contains trailing '/' exclude it from the
305 // prefix-test since we test for it explicitly.
306 if (packagename[len - 1] == '/')
307 len--;
308
309 if (!name()->starts_with(packagename, len))
310 return false;
311
312 // Test if the class name is something like "java/lang".
313 if ((len + 1) > name()->utf8_length())
314 return false;
315
316 // Test for trailing '/'
317 if (name()->char_at(len) != '/')
318 return false;
319
320 // Make sure it's not actually in a subpackage:
321 if (name()->index_of_at(len+1, "/", 1) >= 0)
322 return false;
323
324 return true;
325 }
326
327 // ------------------------------------------------------------------
328 // ciInstanceKlass::print_impl
329 //
330 // Implementation of the print method.
331 void ciInstanceKlass::print_impl(outputStream* st) {
332 ciKlass::print_impl(st);
333 GUARDED_VM_ENTRY(st->print(" loader=" INTPTR_FORMAT, p2i(loader()));)
334 if (is_loaded()) {
335 st->print(" initialized=%s finalized=%s subklass=%s size=%d flags=",
336 bool_to_str(is_initialized()),
337 bool_to_str(has_finalizer()),
338 bool_to_str(has_subklass()),
339 layout_helper());
340
341 _flags.print_klass_flags(st);
342
343 if (_super) {
344 st->print(" super=");
345 _super->print_name_on(st);
346 }
347 if (_java_mirror) {
348 st->print(" mirror=PRESENT");
349 }
350 }
351 }
352
353 // ------------------------------------------------------------------
354 // ciInstanceKlass::super
355 //
356 // Get the superklass of this klass.
357 ciInstanceKlass* ciInstanceKlass::super() {
358 assert(is_loaded(), "must be loaded");
359 if (_super == nullptr && !is_java_lang_Object()) {
360 GUARDED_VM_ENTRY(
361 Klass* super_klass = get_instanceKlass()->super();
362 _super = CURRENT_ENV->get_instance_klass(super_klass);
363 )
364 }
365 return _super;
366 }
367
368 // ------------------------------------------------------------------
369 // ciInstanceKlass::java_mirror
370 //
371 // Get the instance of java.lang.Class corresponding to this klass.
372 // Cache it on this->_java_mirror.
373 ciInstance* ciInstanceKlass::java_mirror() {
374 if (is_shared()) {
375 return ciKlass::java_mirror();
376 }
377 if (_java_mirror == nullptr) {
378 _java_mirror = ciKlass::java_mirror();
379 }
380 return _java_mirror;
381 }
382
383 // ------------------------------------------------------------------
384 // ciInstanceKlass::unique_concrete_subklass
385 ciInstanceKlass* ciInstanceKlass::unique_concrete_subklass() {
386 if (!is_loaded()) return nullptr; // No change if class is not loaded
387 if (!is_abstract()) return nullptr; // Only applies to abstract classes.
388 if (!has_subklass()) return nullptr; // Must have at least one subklass.
389 VM_ENTRY_MARK;
390 InstanceKlass* ik = get_instanceKlass();
391 Klass* up = ik->up_cast_abstract();
392 assert(up->is_instance_klass(), "must be InstanceKlass");
393 if (ik == up) {
394 return nullptr;
395 }
396 return CURRENT_THREAD_ENV->get_instance_klass(up);
397 }
398
399 // ------------------------------------------------------------------
400 // ciInstanceKlass::has_finalizable_subclass
401 bool ciInstanceKlass::has_finalizable_subclass() {
402 if (!is_loaded()) return true;
403 VM_ENTRY_MARK;
404 return Dependencies::find_finalizable_subclass(get_instanceKlass()) != nullptr;
405 }
406
407 // ------------------------------------------------------------------
408 // ciInstanceKlass::contains_field_offset
409 bool ciInstanceKlass::contains_field_offset(int offset) {
410 VM_ENTRY_MARK;
411 return get_instanceKlass()->contains_field_offset(offset);
412 }
413
414 ciField* ciInstanceKlass::get_nonstatic_field_by_offset(const int field_offset) {
415 for (int i = 0, len = nof_nonstatic_fields(); i < len; i++) {
416 ciField* field = _nonstatic_fields->at(i);
417 int field_off = field->offset_in_bytes();
418 if (field_off == field_offset)
419 return field;
420 }
421 return nullptr;
422 }
423
424 // ------------------------------------------------------------------
425 // ciInstanceKlass::get_field_by_offset
426 ciField* ciInstanceKlass::get_field_by_offset(int field_offset, bool is_static) {
427 if (!is_static) {
428 return get_nonstatic_field_by_offset(field_offset);
429 }
430 VM_ENTRY_MARK;
431 InstanceKlass* k = get_instanceKlass();
432 fieldDescriptor fd;
433 if (!k->find_field_from_offset(field_offset, is_static, &fd)) {
434 return nullptr;
435 }
436 ciField* field = new (CURRENT_THREAD_ENV->arena()) ciField(&fd);
437 return field;
438 }
439
440 // ------------------------------------------------------------------
441 // ciInstanceKlass::get_field_by_name
442 ciField* ciInstanceKlass::get_field_by_name(ciSymbol* name, ciSymbol* signature, bool is_static) {
443 VM_ENTRY_MARK;
444 InstanceKlass* k = get_instanceKlass();
445 fieldDescriptor fd;
446 Klass* def = k->find_field(name->get_symbol(), signature->get_symbol(), is_static, &fd);
447 if (def == nullptr) {
448 return nullptr;
449 }
450 ciField* field = new (CURRENT_THREAD_ENV->arena()) ciField(&fd);
451 return field;
452 }
453
454 // This is essentially a shortcut for:
455 // get_field_by_offset(field_offset, is_static)->layout_type()
456 // except this does not require allocating memory for a new ciField
457 BasicType ciInstanceKlass::get_field_type_by_offset(const int field_offset, const bool is_static) {
458 if (!is_static) {
459 ciField* field = get_nonstatic_field_by_offset(field_offset);
460 return field != nullptr ? field->layout_type() : T_ILLEGAL;
461 }
462
463 // Avoid allocating a new ciField by obtaining the field type directly
464 VM_ENTRY_MARK;
465 InstanceKlass* k = get_instanceKlass();
466 fieldDescriptor fd;
467 if (!k->find_field_from_offset(field_offset, is_static, &fd)) {
468 return T_ILLEGAL;
469 }
470
471 // Reproduce the behavior of ciField::layout_type
472 BasicType field_type = fd.field_type();
473 if (is_reference_type(field_type)) {
474 return T_OBJECT;
475 }
476 return type2field[make(field_type)->basic_type()];
477 }
478
479 // ------------------------------------------------------------------
480 // ciInstanceKlass::compute_nonstatic_fields
481 int ciInstanceKlass::compute_nonstatic_fields() {
482 assert(is_loaded(), "must be loaded");
483
484 if (_nonstatic_fields != nullptr)
485 return _nonstatic_fields->length();
486
487 if (!has_nonstatic_fields()) {
488 Arena* arena = CURRENT_ENV->arena();
489 _nonstatic_fields = new (arena) GrowableArray<ciField*>(arena, 0, 0, nullptr);
490 return 0;
491 }
492 assert(!is_java_lang_Object(), "bootstrap OK");
493
494 ciInstanceKlass* super = this->super();
495 GrowableArray<ciField*>* super_fields = nullptr;
496 if (super != nullptr && super->has_nonstatic_fields()) {
497 int super_flen = super->nof_nonstatic_fields();
498 super_fields = super->_nonstatic_fields;
499 assert(super_flen == 0 || super_fields != nullptr, "first get nof_fields");
500 }
501
502 GrowableArray<ciField*>* fields = nullptr;
503 GUARDED_VM_ENTRY({
504 fields = compute_nonstatic_fields_impl(super_fields);
505 });
506
507 if (fields == nullptr) {
508 // This can happen if this class (java.lang.Class) has invisible fields.
509 if (super_fields != nullptr) {
510 _nonstatic_fields = super_fields;
511 return super_fields->length();
512 } else {
513 return 0;
514 }
515 }
516
517 int flen = fields->length();
518
519 _nonstatic_fields = fields;
520 return flen;
521 }
522
523 GrowableArray<ciField*>*
524 ciInstanceKlass::compute_nonstatic_fields_impl(GrowableArray<ciField*>*
525 super_fields) {
526 ASSERT_IN_VM;
527 Arena* arena = CURRENT_ENV->arena();
528 int flen = 0;
529 GrowableArray<ciField*>* fields = nullptr;
530 InstanceKlass* k = get_instanceKlass();
531 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
532 if (fs.access_flags().is_static()) continue;
533 flen += 1;
534 }
535
536 // allocate the array:
537 if (flen == 0) {
538 return nullptr; // return nothing if none are locally declared
539 }
540 if (super_fields != nullptr) {
541 flen += super_fields->length();
542 }
543 fields = new (arena) GrowableArray<ciField*>(arena, flen, 0, nullptr);
544 if (super_fields != nullptr) {
545 fields->appendAll(super_fields);
546 }
547
548 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
549 if (fs.access_flags().is_static()) continue;
550 fieldDescriptor& fd = fs.field_descriptor();
551 ciField* field = new (arena) ciField(&fd);
552 fields->append(field);
553 }
554 assert(fields->length() == flen, "sanity");
555 return fields;
556 }
557
558 bool ciInstanceKlass::compute_injected_fields_helper() {
559 ASSERT_IN_VM;
560 InstanceKlass* k = get_instanceKlass();
561
562 for (InternalFieldStream fs(k); !fs.done(); fs.next()) {
563 if (fs.access_flags().is_static()) continue;
564 return true;
565 }
566 return false;
567 }
568
569 void ciInstanceKlass::compute_injected_fields() {
570 assert(is_loaded(), "must be loaded");
571
572 int has_injected_fields = 0;
573 if (super() != nullptr && super()->has_injected_fields()) {
574 has_injected_fields = 1;
575 } else {
576 GUARDED_VM_ENTRY({
577 has_injected_fields = compute_injected_fields_helper() ? 1 : 0;
578 });
579 }
580 // may be concurrently initialized for shared ciInstanceKlass objects
581 assert(_has_injected_fields == -1 || _has_injected_fields == has_injected_fields, "broken concurrent initialization");
582 _has_injected_fields = has_injected_fields;
583 }
584
585 bool ciInstanceKlass::has_object_fields() const {
586 GUARDED_VM_ENTRY(
587 return get_instanceKlass()->nonstatic_oop_map_size() > 0;
588 );
589 }
590
591 bool ciInstanceKlass::compute_has_trusted_loader() {
592 ASSERT_IN_VM;
593 oop loader_oop = loader();
594 if (loader_oop == nullptr) {
595 return true; // bootstrap class loader
596 }
597 return java_lang_ClassLoader::is_trusted_loader(loader_oop);
598 }
599
600 bool ciInstanceKlass::has_class_initializer() {
601 VM_ENTRY_MARK;
602 return get_instanceKlass()->class_initializer() != nullptr;
603 }
604
605 // ------------------------------------------------------------------
606 // ciInstanceKlass::find_method
607 //
608 // Find a method in this klass.
609 ciMethod* ciInstanceKlass::find_method(ciSymbol* name, ciSymbol* signature) {
610 VM_ENTRY_MARK;
611 InstanceKlass* k = get_instanceKlass();
612 Symbol* name_sym = name->get_symbol();
613 Symbol* sig_sym= signature->get_symbol();
614
615 Method* m = k->find_method(name_sym, sig_sym);
616 if (m == nullptr) return nullptr;
617
618 return CURRENT_THREAD_ENV->get_method(m);
619 }
620
621 // ------------------------------------------------------------------
622 // ciInstanceKlass::is_leaf_type
623 bool ciInstanceKlass::is_leaf_type() {
624 assert(is_loaded(), "must be loaded");
625 if (is_shared()) {
626 return is_final(); // approximately correct
627 } else {
628 return !has_subklass() && (!is_interface() || nof_implementors() == 0);
629 }
630 }
631
632 // ------------------------------------------------------------------
633 // ciInstanceKlass::implementor
634 //
635 // Report an implementor of this interface.
636 // Note that there are various races here, since my copy
637 // of _nof_implementors might be out of date with respect
638 // to results returned by InstanceKlass::implementor.
639 // This is OK, since any dependencies we decide to assert
640 // will be checked later under the Compile_lock.
641 ciInstanceKlass* ciInstanceKlass::implementor() {
642 assert(is_interface(), "required");
643 ciInstanceKlass* impl = _implementor;
644 if (impl == nullptr) {
645 if (is_shared()) {
646 impl = this; // assume a well-known interface never has a unique implementor
647 } else {
648 // Go into the VM to fetch the implementor.
649 VM_ENTRY_MARK;
650 InstanceKlass* ik = get_instanceKlass();
651 Klass* implk = ik->implementor();
652 if (implk != nullptr) {
653 if (implk == ik) {
654 // More than one implementors. Use 'this' in this case.
655 impl = this;
656 } else {
657 impl = CURRENT_THREAD_ENV->get_instance_klass(implk);
658 }
659 }
660 }
661 // Memoize this result.
662 _implementor = impl;
663 }
664 return impl;
665 }
666
667 // Utility class for printing of the contents of the static fields for
668 // use by compilation replay. It only prints out the information that
669 // could be consumed by the compiler, so for primitive types it prints
670 // out the actual value. For Strings it's the actual string value.
671 // For array types it it's first level array size since that's the
672 // only value which statically unchangeable. For all other reference
673 // types it simply prints out the dynamic type.
674
675 class StaticFinalFieldPrinter : public FieldClosure {
676 outputStream* _out;
677 const char* _holder;
678 public:
679 StaticFinalFieldPrinter(outputStream* out, const char* holder) :
680 _out(out),
681 _holder(holder) {
682 }
683 void do_field(fieldDescriptor* fd) {
684 if (fd->is_final() && !fd->has_initial_value()) {
685 ResourceMark rm;
686 oop mirror = fd->field_holder()->java_mirror();
687 _out->print("staticfield %s %s %s ", _holder, fd->name()->as_quoted_ascii(), fd->signature()->as_quoted_ascii());
688 BasicType field_type = fd->field_type();
689 switch (field_type) {
690 case T_BYTE: _out->print_cr("%d", mirror->byte_field(fd->offset())); break;
691 case T_BOOLEAN: _out->print_cr("%d", mirror->bool_field(fd->offset())); break;
692 case T_SHORT: _out->print_cr("%d", mirror->short_field(fd->offset())); break;
693 case T_CHAR: _out->print_cr("%d", mirror->char_field(fd->offset())); break;
694 case T_INT: _out->print_cr("%d", mirror->int_field(fd->offset())); break;
695 case T_LONG: _out->print_cr(INT64_FORMAT, (int64_t)(mirror->long_field(fd->offset()))); break;
696 case T_FLOAT: {
697 float f = mirror->float_field(fd->offset());
698 _out->print_cr("%d", *(int*)&f);
699 break;
700 }
701 case T_DOUBLE: {
702 double d = mirror->double_field(fd->offset());
703 _out->print_cr(INT64_FORMAT, *(int64_t*)&d);
704 break;
705 }
706 case T_ARRAY: // fall-through
707 case T_OBJECT: {
708 oop value = mirror->obj_field_acquire(fd->offset());
709 if (value == nullptr) {
710 if (field_type == T_ARRAY) {
711 _out->print("%d", -1);
712 }
713 _out->cr();
714 } else if (value->is_instance()) {
715 assert(field_type == T_OBJECT, "");
716 if (value->is_a(vmClasses::String_klass())) {
717 const char* ascii_value = java_lang_String::as_quoted_ascii(value);
718 _out->print_cr("\"%s\"", (ascii_value != nullptr) ? ascii_value : "");
719 } else {
720 const char* klass_name = value->klass()->name()->as_quoted_ascii();
721 _out->print_cr("%s", klass_name);
722 }
723 } else if (value->is_array()) {
724 typeArrayOop ta = (typeArrayOop)value;
725 _out->print("%d", ta->length());
726 if (value->is_objArray()) {
727 objArrayOop oa = (objArrayOop)value;
728 const char* klass_name = value->klass()->name()->as_quoted_ascii();
729 _out->print(" %s", klass_name);
730 }
731 _out->cr();
732 } else {
733 ShouldNotReachHere();
734 }
735 break;
736 }
737 default:
738 ShouldNotReachHere();
739 }
740 }
741 }
742 };
743
744 const char *ciInstanceKlass::replay_name() const {
745 return CURRENT_ENV->replay_name(get_instanceKlass());
746 }
747
748 void ciInstanceKlass::dump_replay_instanceKlass(outputStream* out, InstanceKlass* ik) {
749 if (ik->is_hidden()) {
750 const char *name = CURRENT_ENV->dyno_name(ik);
751 if (name != nullptr) {
752 out->print_cr("instanceKlass %s # %s", name, ik->name()->as_quoted_ascii());
753 } else {
754 out->print_cr("# instanceKlass %s", ik->name()->as_quoted_ascii());
755 }
756 } else {
757 out->print_cr("instanceKlass %s", ik->name()->as_quoted_ascii());
758 }
759 }
760
761 GrowableArray<ciInstanceKlass*>* ciInstanceKlass::transitive_interfaces() const{
762 if (_transitive_interfaces == nullptr) {
763 const_cast<ciInstanceKlass*>(this)->compute_transitive_interfaces();
764 }
765 return _transitive_interfaces;
766 }
767
768 void ciInstanceKlass::compute_transitive_interfaces() {
769 GUARDED_VM_ENTRY(
770 InstanceKlass* ik = get_instanceKlass();
771 Array<InstanceKlass*>* interfaces = ik->transitive_interfaces();
772 int orig_length = interfaces->length();
773 Arena* arena = CURRENT_ENV->arena();
774 int transitive_interfaces_len = orig_length + (is_interface() ? 1 : 0);
775 GrowableArray<ciInstanceKlass*>* transitive_interfaces = new(arena)GrowableArray<ciInstanceKlass*>(arena, transitive_interfaces_len,
776 0, nullptr);
777 for (int i = 0; i < orig_length; i++) {
778 transitive_interfaces->append(CURRENT_ENV->get_instance_klass(interfaces->at(i)));
779 }
780 if (is_interface()) {
781 transitive_interfaces->append(this);
782 }
783 _transitive_interfaces = transitive_interfaces;
784 );
785 }
786
787 void ciInstanceKlass::dump_replay_data(outputStream* out) {
788 ResourceMark rm;
789
790 InstanceKlass* ik = get_instanceKlass();
791 ConstantPool* cp = ik->constants();
792
793 // Try to record related loaded classes
794 Klass* sub = ik->subklass();
795 while (sub != nullptr) {
796 if (sub->is_instance_klass()) {
797 InstanceKlass *isub = InstanceKlass::cast(sub);
798 dump_replay_instanceKlass(out, isub);
799 }
800 sub = sub->next_sibling();
801 }
802
803 // Dump out the state of the constant pool tags. During replay the
804 // tags will be validated for things which shouldn't change and
805 // classes will be resolved if the tags indicate that they were
806 // resolved at compile time.
807 const char *name = replay_name();
808 out->print("ciInstanceKlass %s %d %d %d", name,
809 is_linked(), is_initialized(), cp->length());
810 for (int index = 1; index < cp->length(); index++) {
811 out->print(" %d", cp->tags()->at(index));
812 }
813 out->cr();
814 if (is_initialized()) {
815 // Dump out the static final fields in case the compilation relies
816 // on their value for correct replay.
817 StaticFinalFieldPrinter sffp(out, name);
818 ik->do_local_static_fields(&sffp);
819 }
820 }
821
822 #ifdef ASSERT
823 bool ciInstanceKlass::debug_final_field_at(int offset) {
824 GUARDED_VM_ENTRY(
825 InstanceKlass* ik = get_instanceKlass();
826 fieldDescriptor fd;
827 if (ik->find_field_from_offset(offset, false, &fd)) {
828 return fd.is_final();
829 }
830 );
831 return false;
832 }
833
834 bool ciInstanceKlass::debug_stable_field_at(int offset) {
835 GUARDED_VM_ENTRY(
836 InstanceKlass* ik = get_instanceKlass();
837 fieldDescriptor fd;
838 if (ik->find_field_from_offset(offset, false, &fd)) {
839 return fd.is_stable();
840 }
841 );
842 return false;
843 }
844 #endif