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