1 /*
2 * Copyright (c) 1999, 2023, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "ci/ciField.hpp"
27 #include "ci/ciInstance.hpp"
28 #include "ci/ciInstanceKlass.hpp"
29 #include "ci/ciUtilities.inline.hpp"
30 #include "classfile/javaClasses.hpp"
31 #include "classfile/vmClasses.hpp"
32 #include "memory/allocation.hpp"
33 #include "memory/allocation.inline.hpp"
34 #include "memory/resourceArea.hpp"
35 #include "oops/instanceKlass.inline.hpp"
36 #include "oops/klass.inline.hpp"
37 #include "oops/oop.inline.hpp"
38 #include "oops/fieldStreams.inline.hpp"
39 #include "runtime/fieldDescriptor.inline.hpp"
40 #include "runtime/handles.inline.hpp"
41 #include "runtime/jniHandles.inline.hpp"
42
43 // ciInstanceKlass
44 //
45 // This class represents a Klass* in the HotSpot virtual machine
46 // whose Klass part in an InstanceKlass.
47
48
49 // ------------------------------------------------------------------
50 // ciInstanceKlass::ciInstanceKlass
51 //
52 // Loaded instance klass.
53 ciInstanceKlass::ciInstanceKlass(Klass* k) :
54 ciKlass(k)
55 {
56 assert(get_Klass()->is_instance_klass(), "wrong type");
57
58 InstanceKlass* ik = get_instanceKlass();
59
60 #ifdef ASSERT
61 if (!ik->is_loaded()) {
62 ResourceMark rm;
63 ik->print_on(tty);
64 assert(false, "must be at least loaded: %s", ik->name()->as_C_string());
65 }
66 #endif // ASSERT
67
68 AccessFlags access_flags = ik->access_flags();
69 _flags = ciFlags(access_flags);
70 _has_finalizer = access_flags.has_finalizer();
71 _has_subklass = flags().is_final() ? subklass_false : subklass_unknown;
72 _init_state = compute_init_state(ik); // _init_state
73 _has_nonstatic_fields = ik->has_nonstatic_fields();
74 _has_nonstatic_concrete_methods = ik->has_nonstatic_concrete_methods();
75 _is_hidden = ik->is_hidden();
76 _is_record = ik->is_record();
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 _protection_domain = JNIHandles::make_local(thread,
102 ik->protection_domain());
103 _is_shared = false;
104 } else {
105 Handle h_loader(thread, ik->class_loader());
106 Handle h_protection_domain(thread, ik->protection_domain());
107 _loader = JNIHandles::make_global(h_loader);
108 _protection_domain = JNIHandles::make_global(h_protection_domain);
109 _is_shared = true;
110 }
111
112 _has_trusted_loader = compute_has_trusted_loader();
113
114 // Lazy fields get filled in only upon request.
115 _super = nullptr;
116 _java_mirror = nullptr;
117
118 if (is_shared()) {
119 if (k != vmClasses::Object_klass()) {
120 super();
121 }
122 //compute_nonstatic_fields(); // done outside of constructor
123 }
124
125 _field_cache = nullptr;
126 }
127
128 // Version for unloaded classes:
129 ciInstanceKlass::ciInstanceKlass(ciSymbol* name,
130 jobject loader, jobject protection_domain)
131 : ciKlass(name, T_OBJECT)
132 {
133 assert(name->char_at(0) != JVM_SIGNATURE_ARRAY, "not an instance klass");
134 _init_state = (InstanceKlass::ClassState)0;
135 _has_nonstatic_fields = false;
136 _nonstatic_fields = nullptr;
137 _has_injected_fields = -1;
138 _is_hidden = false;
139 _is_record = false;
140 _loader = loader;
141 _protection_domain = protection_domain;
142 _is_shared = false;
143 _super = nullptr;
144 _java_mirror = nullptr;
145 _field_cache = nullptr;
146 _has_trusted_loader = compute_has_trusted_loader();
147 }
148
149
150
151 // ------------------------------------------------------------------
152 // ciInstanceKlass::compute_shared_is_initialized
153 void ciInstanceKlass::compute_shared_init_state() {
154 GUARDED_VM_ENTRY(
155 InstanceKlass* ik = get_instanceKlass();
156 _init_state = compute_init_state(ik);
157 )
158 }
159
160 InstanceKlass::ClassState ciInstanceKlass::compute_init_state(InstanceKlass* ik) {
161 ASSERT_IN_VM;
162 ciEnv* env = CURRENT_ENV;
163 if (env != nullptr && env->is_precompiled()) {
164 return env->compute_init_state_for_precompiled(ik);
165 } else {
166 return ik->init_state();
167 }
168 }
169
170 // ------------------------------------------------------------------
171 // ciInstanceKlass::compute_shared_has_subklass
172 bool ciInstanceKlass::compute_shared_has_subklass() {
173 GUARDED_VM_ENTRY(
174 InstanceKlass* ik = get_instanceKlass();
175 _has_subklass = ik->subklass() != nullptr ? subklass_true : subklass_false;
176 return _has_subklass == subklass_true;
177 )
178 }
179
180 // ------------------------------------------------------------------
181 // ciInstanceKlass::loader
182 oop ciInstanceKlass::loader() {
183 ASSERT_IN_VM;
184 return JNIHandles::resolve(_loader);
185 }
186
187 // ------------------------------------------------------------------
188 // ciInstanceKlass::loader_handle
189 jobject ciInstanceKlass::loader_handle() {
190 return _loader;
191 }
192
193 // ------------------------------------------------------------------
194 // ciInstanceKlass::protection_domain
195 oop ciInstanceKlass::protection_domain() {
196 ASSERT_IN_VM;
197 return JNIHandles::resolve(_protection_domain);
198 }
199
200 // ------------------------------------------------------------------
201 // ciInstanceKlass::protection_domain_handle
202 jobject ciInstanceKlass::protection_domain_handle() {
203 return _protection_domain;
204 }
205
206 // ------------------------------------------------------------------
207 // ciInstanceKlass::field_cache
208 //
209 // Get the field cache associated with this klass.
210 ciConstantPoolCache* ciInstanceKlass::field_cache() {
211 if (is_shared()) {
212 return nullptr;
213 }
214 if (_field_cache == nullptr) {
215 assert(!is_java_lang_Object(), "Object has no fields");
216 Arena* arena = CURRENT_ENV->arena();
217 _field_cache = new (arena) ciConstantPoolCache(arena, 5);
218 }
219 return _field_cache;
220 }
221
222 // ------------------------------------------------------------------
223 // ciInstanceKlass::get_canonical_holder
224 //
225 ciInstanceKlass* ciInstanceKlass::get_canonical_holder(int offset) {
226 #ifdef ASSERT
227 if (!(offset >= 0 && offset < layout_helper_size_in_bytes())) {
228 tty->print("*** get_canonical_holder(%d) on ", offset);
229 this->print();
230 tty->print_cr(" ***");
231 };
232 assert(offset >= 0 && offset < layout_helper_size_in_bytes(), "offset must be tame");
233 #endif
234
235 if (offset < instanceOopDesc::base_offset_in_bytes()) {
236 // All header offsets belong properly to java/lang/Object.
237 return CURRENT_ENV->Object_klass();
238 }
239
240 ciInstanceKlass* self = this;
241 assert(self->is_loaded(), "must be loaded to access field info");
242 ciField* field = self->get_field_by_offset(offset, false);
243 if (field != nullptr) {
244 return field->holder();
245 } else {
246 for (;;) {
247 assert(self->is_loaded(), "must be loaded to have size");
248 ciInstanceKlass* super = self->super();
249 if (super == nullptr ||
250 super->nof_nonstatic_fields() == 0 ||
251 super->layout_helper_size_in_bytes() <= offset) {
252 return self;
253 } else {
254 self = super; // return super->get_canonical_holder(offset)
255 }
256 }
257 }
258 }
259
260 // ------------------------------------------------------------------
261 // ciInstanceKlass::is_java_lang_Object
262 //
263 // Is this klass java.lang.Object?
264 bool ciInstanceKlass::is_java_lang_Object() const {
265 return equals(CURRENT_ENV->Object_klass());
266 }
267
268 // ------------------------------------------------------------------
269 // ciInstanceKlass::uses_default_loader
270 bool ciInstanceKlass::uses_default_loader() const {
271 // Note: We do not need to resolve the handle or enter the VM
272 // in order to test null-ness.
273 return _loader == nullptr;
274 }
275
276 // ------------------------------------------------------------------
277
278 /**
279 * Return basic type of boxed value for box klass or T_OBJECT if not.
280 */
281 BasicType ciInstanceKlass::box_klass_type() const {
282 if (uses_default_loader() && is_loaded()) {
283 return vmClasses::box_klass_type(get_Klass());
284 } else {
285 return T_OBJECT;
286 }
287 }
288
289 /**
290 * Is this boxing klass?
291 */
292 bool ciInstanceKlass::is_box_klass() const {
293 return is_java_primitive(box_klass_type());
294 }
295
296 /**
297 * Is this boxed value offset?
298 */
299 bool ciInstanceKlass::is_boxed_value_offset(int offset) const {
300 BasicType bt = box_klass_type();
301 return is_java_primitive(bt) &&
302 (offset == java_lang_boxing_object::value_offset(bt));
303 }
304
305 // ------------------------------------------------------------------
306 // ciInstanceKlass::is_in_package
307 //
308 // Is this klass in the given package?
309 bool ciInstanceKlass::is_in_package(const char* packagename, int len) {
310 // To avoid class loader mischief, this test always rejects application classes.
311 if (!uses_default_loader())
312 return false;
313 GUARDED_VM_ENTRY(
314 return is_in_package_impl(packagename, len);
315 )
316 }
317
318 bool ciInstanceKlass::is_in_package_impl(const char* packagename, int len) {
319 ASSERT_IN_VM;
320
321 // If packagename contains trailing '/' exclude it from the
322 // prefix-test since we test for it explicitly.
323 if (packagename[len - 1] == '/')
324 len--;
325
326 if (!name()->starts_with(packagename, len))
327 return false;
328
329 // Test if the class name is something like "java/lang".
330 if ((len + 1) > name()->utf8_length())
331 return false;
332
333 // Test for trailing '/'
334 if (name()->char_at(len) != '/')
335 return false;
336
337 // Make sure it's not actually in a subpackage:
338 if (name()->index_of_at(len+1, "/", 1) >= 0)
339 return false;
340
341 return true;
342 }
343
344 // ------------------------------------------------------------------
345 // ciInstanceKlass::print_impl
346 //
347 // Implementation of the print method.
348 void ciInstanceKlass::print_impl(outputStream* st) {
349 ciKlass::print_impl(st);
350 GUARDED_VM_ENTRY(st->print(" loader=" INTPTR_FORMAT, p2i(loader()));)
351 if (is_loaded()) {
352 st->print(" initialized=%s finalized=%s subklass=%s size=%d flags=",
353 bool_to_str(is_initialized()),
354 bool_to_str(has_finalizer()),
355 bool_to_str(has_subklass()),
356 layout_helper());
357
358 _flags.print_klass_flags(st);
359
360 if (_super) {
361 st->print(" super=");
362 _super->print_name_on(st);
363 }
364 if (_java_mirror) {
365 st->print(" mirror=PRESENT");
366 }
367 }
368 }
369
370 // ------------------------------------------------------------------
371 // ciInstanceKlass::super
372 //
373 // Get the superklass of this klass.
374 ciInstanceKlass* ciInstanceKlass::super() {
375 assert(is_loaded(), "must be loaded");
376 if (_super == nullptr && !is_java_lang_Object()) {
377 GUARDED_VM_ENTRY(
378 Klass* super_klass = get_instanceKlass()->super();
379 _super = CURRENT_ENV->get_instance_klass(super_klass);
380 )
381 }
382 return _super;
383 }
384
385 // ------------------------------------------------------------------
386 // ciInstanceKlass::java_mirror
387 //
388 // Get the instance of java.lang.Class corresponding to this klass.
389 // Cache it on this->_java_mirror.
390 ciInstance* ciInstanceKlass::java_mirror() {
391 if (is_shared()) {
392 return ciKlass::java_mirror();
393 }
394 if (_java_mirror == nullptr) {
395 _java_mirror = ciKlass::java_mirror();
396 }
397 return _java_mirror;
398 }
399
400 // ------------------------------------------------------------------
401 // ciInstanceKlass::unique_concrete_subklass
402 ciInstanceKlass* ciInstanceKlass::unique_concrete_subklass() {
403 if (!is_loaded()) return nullptr; // No change if class is not loaded
404 if (!is_abstract()) return nullptr; // Only applies to abstract classes.
405 if (!has_subklass()) return nullptr; // Must have at least one subklass.
406 VM_ENTRY_MARK;
407 InstanceKlass* ik = get_instanceKlass();
408 Klass* up = ik->up_cast_abstract();
409 assert(up->is_instance_klass(), "must be InstanceKlass");
410 if (ik == up) {
411 return nullptr;
412 }
413 return CURRENT_THREAD_ENV->get_instance_klass(up);
414 }
415
416 // ------------------------------------------------------------------
417 // ciInstanceKlass::has_finalizable_subclass
418 bool ciInstanceKlass::has_finalizable_subclass() {
419 if (!is_loaded()) return true;
420 VM_ENTRY_MARK;
421 return Dependencies::find_finalizable_subclass(get_instanceKlass()) != nullptr;
422 }
423
424 // ------------------------------------------------------------------
425 // ciInstanceKlass::contains_field_offset
426 bool ciInstanceKlass::contains_field_offset(int offset) {
427 VM_ENTRY_MARK;
428 return get_instanceKlass()->contains_field_offset(offset);
429 }
430
431 // ------------------------------------------------------------------
432 // ciInstanceKlass::get_field_by_offset
433 ciField* ciInstanceKlass::get_field_by_offset(int field_offset, bool is_static) {
434 if (!is_static) {
435 for (int i = 0, len = nof_nonstatic_fields(); i < len; i++) {
436 ciField* field = _nonstatic_fields->at(i);
437 int field_off = field->offset_in_bytes();
438 if (field_off == field_offset)
439 return field;
440 if (field_off > field_offset)
441 break;
442 // could do binary search or check bins, but probably not worth it
443 }
444 return nullptr;
445 }
446 VM_ENTRY_MARK;
447 InstanceKlass* k = get_instanceKlass();
448 fieldDescriptor fd;
449 if (!k->find_field_from_offset(field_offset, is_static, &fd)) {
450 return nullptr;
451 }
452 ciField* field = new (CURRENT_THREAD_ENV->arena()) ciField(&fd);
453 return field;
454 }
455
456 // ------------------------------------------------------------------
457 // ciInstanceKlass::get_field_by_name
458 ciField* ciInstanceKlass::get_field_by_name(ciSymbol* name, ciSymbol* signature, bool is_static) {
459 VM_ENTRY_MARK;
460 InstanceKlass* k = get_instanceKlass();
461 fieldDescriptor fd;
462 Klass* def = k->find_field(name->get_symbol(), signature->get_symbol(), is_static, &fd);
463 if (def == nullptr) {
464 return nullptr;
465 }
466 ciField* field = new (CURRENT_THREAD_ENV->arena()) ciField(&fd);
467 return field;
468 }
469
470
471 static int sort_field_by_offset(ciField** a, ciField** b) {
472 return (*a)->offset_in_bytes() - (*b)->offset_in_bytes();
473 // (no worries about 32-bit overflow...)
474 }
475
476 // ------------------------------------------------------------------
477 // ciInstanceKlass::compute_nonstatic_fields
478 int ciInstanceKlass::compute_nonstatic_fields() {
479 assert(is_loaded(), "must be loaded");
480
481 if (_nonstatic_fields != nullptr)
482 return _nonstatic_fields->length();
483
484 if (!has_nonstatic_fields()) {
485 Arena* arena = CURRENT_ENV->arena();
486 _nonstatic_fields = new (arena) GrowableArray<ciField*>(arena, 0, 0, nullptr);
487 return 0;
488 }
489 assert(!is_java_lang_Object(), "bootstrap OK");
490
491 ciInstanceKlass* super = this->super();
492 GrowableArray<ciField*>* super_fields = nullptr;
493 if (super != nullptr && super->has_nonstatic_fields()) {
494 int super_flen = super->nof_nonstatic_fields();
495 super_fields = super->_nonstatic_fields;
496 assert(super_flen == 0 || super_fields != nullptr, "first get nof_fields");
497 }
498
499 GrowableArray<ciField*>* fields = nullptr;
500 GUARDED_VM_ENTRY({
501 fields = compute_nonstatic_fields_impl(super_fields);
502 });
503
504 if (fields == nullptr) {
505 // This can happen if this class (java.lang.Class) has invisible fields.
506 if (super_fields != nullptr) {
507 _nonstatic_fields = super_fields;
508 return super_fields->length();
509 } else {
510 return 0;
511 }
512 }
513
514 int flen = fields->length();
515
516 // Now sort them by offset, ascending.
517 // (In principle, they could mix with superclass fields.)
518 fields->sort(sort_field_by_offset);
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 // ------------------------------------------------------------------
601 // ciInstanceKlass::find_method
602 //
603 // Find a method in this klass.
604 ciMethod* ciInstanceKlass::find_method(ciSymbol* name, ciSymbol* signature) {
605 VM_ENTRY_MARK;
606 InstanceKlass* k = get_instanceKlass();
607 Symbol* name_sym = name->get_symbol();
608 Symbol* sig_sym= signature->get_symbol();
609
610 Method* m = k->find_method(name_sym, sig_sym);
611 if (m == nullptr) return nullptr;
612
613 return CURRENT_THREAD_ENV->get_method(m);
614 }
615
616 // ------------------------------------------------------------------
617 // ciInstanceKlass::is_leaf_type
618 bool ciInstanceKlass::is_leaf_type() {
619 assert(is_loaded(), "must be loaded");
620 if (is_shared()) {
621 return is_final(); // approximately correct
622 } else {
623 return !has_subklass() && (nof_implementors() == 0);
624 }
625 }
626
627 // ------------------------------------------------------------------
628 // ciInstanceKlass::implementor
629 //
630 // Report an implementor of this interface.
631 // Note that there are various races here, since my copy
632 // of _nof_implementors might be out of date with respect
633 // to results returned by InstanceKlass::implementor.
634 // This is OK, since any dependencies we decide to assert
635 // will be checked later under the Compile_lock.
636 ciInstanceKlass* ciInstanceKlass::implementor() {
637 ciInstanceKlass* impl = _implementor;
638 if (impl == nullptr) {
639 if (is_shared()) {
640 impl = this; // assume a well-known interface never has a unique implementor
641 } else {
642 // Go into the VM to fetch the implementor.
643 VM_ENTRY_MARK;
644 InstanceKlass* ik = get_instanceKlass();
645 Klass* implk = ik->implementor();
646 if (implk != nullptr) {
647 if (implk == ik) {
648 // More than one implementors. Use 'this' in this case.
649 impl = this;
650 } else {
651 impl = CURRENT_THREAD_ENV->get_instance_klass(implk);
652 }
653 }
654 }
655 // Memoize this result.
656 _implementor = impl;
657 }
658 return impl;
659 }
660
661 // Utility class for printing of the contents of the static fields for
662 // use by compilation replay. It only prints out the information that
663 // could be consumed by the compiler, so for primitive types it prints
664 // out the actual value. For Strings it's the actual string value.
665 // For array types it it's first level array size since that's the
666 // only value which statically unchangeable. For all other reference
667 // types it simply prints out the dynamic type.
668
669 class StaticFinalFieldPrinter : public FieldClosure {
670 outputStream* _out;
671 const char* _holder;
672 public:
673 StaticFinalFieldPrinter(outputStream* out, const char* holder) :
674 _out(out),
675 _holder(holder) {
676 }
677 void do_field(fieldDescriptor* fd) {
678 if (fd->is_final() && !fd->has_initial_value()) {
679 ResourceMark rm;
680 oop mirror = fd->field_holder()->java_mirror();
681 _out->print("staticfield %s %s %s ", _holder, fd->name()->as_quoted_ascii(), fd->signature()->as_quoted_ascii());
682 switch (fd->field_type()) {
683 case T_BYTE: _out->print_cr("%d", mirror->byte_field(fd->offset())); break;
684 case T_BOOLEAN: _out->print_cr("%d", mirror->bool_field(fd->offset())); break;
685 case T_SHORT: _out->print_cr("%d", mirror->short_field(fd->offset())); break;
686 case T_CHAR: _out->print_cr("%d", mirror->char_field(fd->offset())); break;
687 case T_INT: _out->print_cr("%d", mirror->int_field(fd->offset())); break;
688 case T_LONG: _out->print_cr(INT64_FORMAT, (int64_t)(mirror->long_field(fd->offset()))); break;
689 case T_FLOAT: {
690 float f = mirror->float_field(fd->offset());
691 _out->print_cr("%d", *(int*)&f);
692 break;
693 }
694 case T_DOUBLE: {
695 double d = mirror->double_field(fd->offset());
696 _out->print_cr(INT64_FORMAT, *(int64_t*)&d);
697 break;
698 }
699 case T_ARRAY: // fall-through
700 case T_OBJECT: {
701 oop value = mirror->obj_field_acquire(fd->offset());
702 if (value == nullptr) {
703 _out->print_cr("null");
704 } else if (value->is_instance()) {
705 assert(fd->field_type() == T_OBJECT, "");
706 if (value->is_a(vmClasses::String_klass())) {
707 const char* ascii_value = java_lang_String::as_quoted_ascii(value);
708 _out->print_cr("\"%s\"", (ascii_value != nullptr) ? ascii_value : "");
709 } else {
710 const char* klass_name = value->klass()->name()->as_quoted_ascii();
711 _out->print_cr("%s", klass_name);
712 }
713 } else if (value->is_array()) {
714 typeArrayOop ta = (typeArrayOop)value;
715 _out->print("%d", ta->length());
716 if (value->is_objArray()) {
717 objArrayOop oa = (objArrayOop)value;
718 const char* klass_name = value->klass()->name()->as_quoted_ascii();
719 _out->print(" %s", klass_name);
720 }
721 _out->cr();
722 } else {
723 ShouldNotReachHere();
724 }
725 break;
726 }
727 default:
728 ShouldNotReachHere();
729 }
730 }
731 }
732 };
733
734 const char *ciInstanceKlass::replay_name() const {
735 return CURRENT_ENV->replay_name(get_instanceKlass());
736 }
737
738 void ciInstanceKlass::dump_replay_instanceKlass(outputStream* out, InstanceKlass* ik) {
739 if (ik->is_hidden()) {
740 const char *name = CURRENT_ENV->dyno_name(ik);
741 if (name != nullptr) {
742 out->print_cr("instanceKlass %s # %s", name, ik->name()->as_quoted_ascii());
743 } else {
744 out->print_cr("# instanceKlass %s", ik->name()->as_quoted_ascii());
745 }
746 } else {
747 out->print_cr("instanceKlass %s", ik->name()->as_quoted_ascii());
748 }
749 }
750
751 GrowableArray<ciInstanceKlass*>* ciInstanceKlass::transitive_interfaces() const{
752 if (_transitive_interfaces == nullptr) {
753 const_cast<ciInstanceKlass*>(this)->compute_transitive_interfaces();
754 }
755 return _transitive_interfaces;
756 }
757
758 void ciInstanceKlass::compute_transitive_interfaces() {
759 GUARDED_VM_ENTRY(
760 InstanceKlass* ik = get_instanceKlass();
761 Array<InstanceKlass*>* interfaces = ik->transitive_interfaces();
762 int orig_length = interfaces->length();
763 Arena* arena = CURRENT_ENV->arena();
764 int transitive_interfaces_len = orig_length + (is_interface() ? 1 : 0);
765 GrowableArray<ciInstanceKlass*>* transitive_interfaces = new(arena)GrowableArray<ciInstanceKlass*>(arena, transitive_interfaces_len,
766 0, nullptr);
767 for (int i = 0; i < orig_length; i++) {
768 transitive_interfaces->append(CURRENT_ENV->get_instance_klass(interfaces->at(i)));
769 }
770 if (is_interface()) {
771 transitive_interfaces->append(this);
772 }
773 _transitive_interfaces = transitive_interfaces;
774 );
775 }
776
777 void ciInstanceKlass::dump_replay_data(outputStream* out) {
778 ResourceMark rm;
779
780 InstanceKlass* ik = get_instanceKlass();
781 ConstantPool* cp = ik->constants();
782
783 // Try to record related loaded classes
784 Klass* sub = ik->subklass();
785 while (sub != nullptr) {
786 if (sub->is_instance_klass()) {
787 InstanceKlass *isub = InstanceKlass::cast(sub);
788 dump_replay_instanceKlass(out, isub);
789 }
790 sub = sub->next_sibling();
791 }
792
793 // Dump out the state of the constant pool tags. During replay the
794 // tags will be validated for things which shouldn't change and
795 // classes will be resolved if the tags indicate that they were
796 // resolved at compile time.
797 const char *name = replay_name();
798 out->print("ciInstanceKlass %s %d %d %d", name,
799 is_linked(), is_initialized(), cp->length());
800 for (int index = 1; index < cp->length(); index++) {
801 out->print(" %d", cp->tags()->at(index));
802 }
803 out->cr();
804 if (is_initialized()) {
805 // Dump out the static final fields in case the compilation relies
806 // on their value for correct replay.
807 StaticFinalFieldPrinter sffp(out, name);
808 ik->do_local_static_fields(&sffp);
809 }
810 }
811
812 #ifdef ASSERT
813 bool ciInstanceKlass::debug_final_field_at(int offset) {
814 GUARDED_VM_ENTRY(
815 InstanceKlass* ik = get_instanceKlass();
816 fieldDescriptor fd;
817 if (ik->find_field_from_offset(offset, false, &fd)) {
818 return fd.is_final();
819 }
820 );
821 return false;
822 }
823
824 bool ciInstanceKlass::debug_stable_field_at(int offset) {
825 GUARDED_VM_ENTRY(
826 InstanceKlass* ik = get_instanceKlass();
827 fieldDescriptor fd;
828 if (ik->find_field_from_offset(offset, false, &fd)) {
829 return fd.is_stable();
830 }
831 );
832 return false;
833 }
834 #endif