1 /*
2 * Copyright (c) 1997, 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 #ifndef SHARE_CLASSFILE_JAVACLASSES_HPP
26 #define SHARE_CLASSFILE_JAVACLASSES_HPP
27
28 #include "classfile/vmClasses.hpp"
29 #include "oops/instanceKlass.hpp"
30 #include "oops/oopsHierarchy.hpp"
31 #include "oops/symbol.hpp"
32 #include "runtime/handles.hpp"
33 #include "runtime/os.hpp"
34 #include "utilities/macros.hpp"
35 #include "utilities/utf8.hpp"
36 #include "utilities/vmEnums.hpp"
37
38 class JvmtiThreadState;
39 class RecordComponent;
40 class SerializeClosure;
41 class ObjectWaiter;
42 class ObjectMonitor;
43
44 #define CHECK_INIT(offset) assert(offset != 0, "should be initialized"); return offset;
45
46 // Interface to java.lang.Object objects
47
48 class java_lang_Object : AllStatic {
49 public:
50 static void register_natives(TRAPS);
51 };
52
53 // Interface to java.lang.String objects
54
55 // The flags field is a collection of bits representing boolean values used
56 // internally by the VM.
57 #define STRING_INJECTED_FIELDS(macro) \
58 macro(java_lang_String, flags, byte_signature, false)
59
60 class java_lang_String : AllStatic {
61 private:
62 static int _value_offset;
63 static int _hash_offset;
64 static int _hashIsZero_offset;
65 static int _coder_offset;
66 static int _flags_offset;
67
68 static bool _initialized;
69
70 static Handle basic_create(int length, bool byte_arr, TRAPS);
71
72 static inline void set_coder(oop string, jbyte coder);
73
74 // Bitmasks for values in the injected flags field.
75 static const uint8_t _deduplication_forbidden_mask = 1 << 0;
76 static const uint8_t _deduplication_requested_mask = 1 << 1;
77
78 static int flags_offset() { CHECK_INIT(_flags_offset); }
79 // Return the address of the injected flags field.
80 static inline uint8_t* flags_addr(oop java_string);
81 // Test whether the designated bit of the injected flags field is set.
82 static inline bool is_flag_set(oop java_string, uint8_t flag_mask);
83 // Atomically test and set the designated bit of the injected flags field,
84 // returning true if the bit was already set.
85 static bool test_and_set_flag(oop java_string, uint8_t flag_mask);
86
87 static inline unsigned int hash_code_impl(oop java_string, bool update);
88
89 public:
90
91 // Coders
92 enum Coder {
93 CODER_LATIN1 = 0,
94 CODER_UTF16 = 1
95 };
96
97 static void compute_offsets();
98 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
99
100 // Instance creation
101 static Handle create_from_unicode(const jchar* unicode, int len, TRAPS);
102 static oop create_oop_from_unicode(const jchar* unicode, int len, TRAPS);
103 static Handle create_from_str(const char* utf8_str, TRAPS);
104 static oop create_oop_from_str(const char* utf8_str, TRAPS);
105 static Handle create_from_symbol(const Symbol* symbol, TRAPS);
106 static Handle create_from_platform_dependent_str(const char* str, TRAPS);
107
108 static void set_compact_strings(bool value);
109
110 static int value_offset() { CHECK_INIT(_value_offset); }
111 static int coder_offset() { CHECK_INIT(_coder_offset); }
112
113 static inline void set_value(oop string, typeArrayOop buffer);
114
115 // Set the deduplication_forbidden flag true. This flag is sticky; once
116 // set it never gets cleared. This is set when a String is interned in
117 // the StringTable, to prevent string deduplication from changing the
118 // String's value array.
119 static inline void set_deduplication_forbidden(oop java_string);
120
121 // Test and set the deduplication_requested flag. Returns the old value
122 // of the flag. This flag is sticky; once set it never gets cleared.
123 // Some GCs may use this flag when deciding whether to request
124 // deduplication of a String, to avoid multiple requests for the same
125 // object.
126 static inline bool test_and_set_deduplication_requested(oop java_string);
127
128 // Accessors
129 static inline typeArrayOop value(oop java_string);
130 static inline typeArrayOop value_no_keepalive(oop java_string);
131 static inline bool hash_is_set(oop string);
132 static inline bool is_latin1(oop java_string);
133 static inline bool deduplication_forbidden(oop java_string);
134 static inline bool deduplication_requested(oop java_string);
135 static inline int length(oop java_string);
136 static inline int length(oop java_string, typeArrayOop string_value);
137 static size_t utf8_length(oop java_string);
138 static size_t utf8_length(oop java_string, typeArrayOop string_value);
139 // Legacy variants that truncate the length if needed
140 static int utf8_length_as_int(oop java_string);
141 static int utf8_length_as_int(oop java_string, typeArrayOop string_value);
142
143 // String converters
144 static char* as_utf8_string(oop java_string);
145 // `length` is set to the length of the utf8 sequence.
146 static char* as_utf8_string(oop java_string, size_t& length);
147 static char* as_utf8_string_full(oop java_string, char* buf, size_t buflen, size_t& length);
148 static char* as_utf8_string(oop java_string, char* buf, size_t buflen);
149 static char* as_utf8_string(oop java_string, int start, int len);
150 static char* as_utf8_string(oop java_string, typeArrayOop value, char* buf, size_t buflen);
151 static char* as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, size_t buflen);
152 static char* as_platform_dependent_str(Handle java_string, TRAPS);
153 static jchar* as_unicode_string(oop java_string, int& length, TRAPS);
154 static jchar* as_unicode_string_or_null(oop java_string, int& length);
155 // produce an ascii string with all other values quoted using \u####
156 static char* as_quoted_ascii(oop java_string);
157
158 // Compute the hash value for a java.lang.String object which would
159 // contain the characters passed in.
160 //
161 // As the hash value used by the String object itself, in
162 // String.hashCode(). This value is normally calculated in Java code
163 // in the String.hashCode method(), but is precomputed for String
164 // objects in the shared archive file.
165 // hash P(31) from Kernighan & Ritchie
166 //
167 // For this reason, THIS ALGORITHM MUST MATCH String.hashCode().
168 static unsigned int hash_code(const jchar* s, int len) {
169 unsigned int h = 0;
170 while (len-- > 0) {
171 h = 31*h + (unsigned int) *s;
172 s++;
173 }
174 return h;
175 }
176
177 static unsigned int hash_code(const jbyte* s, int len) {
178 unsigned int h = 0;
179 while (len-- > 0) {
180 h = 31*h + (((unsigned int) *s) & 0xFF);
181 s++;
182 }
183 return h;
184 }
185
186 static unsigned int hash_code(const char* utf8_str, size_t utf8_len) {
187 unsigned int h = 0;
188 int unicode_length = UTF8::unicode_length(utf8_str, utf8_len);
189
190 jchar c;
191 while (unicode_length-- > 0) {
192 utf8_str = UTF8::next(utf8_str, &c);
193 h = 31 * h + ((unsigned int)c);
194 }
195 return h;
196 }
197
198 static unsigned int hash_code(oop java_string);
199 static unsigned int hash_code_noupdate(oop java_string);
200
201 // Compare strings (of different types/encodings), length is the string (array) length
202 static bool equals(oop java_string, const jchar* chars, int len);
203 static bool equals(oop java_string, const char* utf8_str, size_t utf8_len);
204 static bool equals(oop str1, oop str2);
205 static inline bool value_equals(typeArrayOop str_value1, typeArrayOop str_value2);
206
207 // Conversion between '.' and '/' formats, and allocate a String from the result.
208 static Handle externalize_classname(Symbol* java_name, TRAPS);
209
210 // Conversion
211 static Symbol* as_symbol(oop java_string);
212 static Symbol* as_symbol_or_null(oop java_string);
213
214 // Tester
215 static inline bool is_instance(oop obj);
216 static inline bool is_instance_without_asserts(oop obj);
217
218 // Debugging
219 static void print(oop java_string, outputStream* st, int max_length = MaxStringPrintSize);
220 friend class JavaClasses;
221 friend class StringTable;
222 };
223
224
225 // Interface to java.lang.Class objects
226
227 #define CLASS_INJECTED_FIELDS(macro) \
228 macro(java_lang_Class, klass, intptr_signature, false) \
229 macro(java_lang_Class, array_klass, intptr_signature, false) \
230 macro(java_lang_Class, oop_size, int_signature, false) \
231 macro(java_lang_Class, static_oop_field_count, int_signature, false) \
232 macro(java_lang_Class, source_file, object_signature, false) \
233 macro(java_lang_Class, init_lock, object_signature, false)
234
235 class java_lang_Class : AllStatic {
236 friend class VMStructs;
237 friend class JVMCIVMStructs;
238 friend class HeapShared;
239
240 private:
241
242 // The fake offsets are added by the class loader when java.lang.Class is loaded
243
244 static int _klass_offset;
245 static int _array_klass_offset;
246
247 static int _oop_size_offset;
248 static int _static_oop_field_count_offset;
249
250 static int _protection_domain_offset;
251 static int _init_lock_offset;
252 static int _signers_offset;
253 static int _class_loader_offset;
254 static int _module_offset;
255 static int _component_mirror_offset;
256
257 static int _name_offset;
258 static int _source_file_offset;
259 static int _classData_offset;
260 static int _classRedefinedCount_offset;
261 static int _reflectionData_offset;
262 static int _modifiers_offset;
263 static int _is_primitive_offset;
264 static int _is_identity_offset;
265 static int _raw_access_flags_offset;
266
267 static bool _offsets_computed;
268
269 static GrowableArray<Klass*>* _fixup_mirror_list;
270 static GrowableArray<Klass*>* _fixup_module_field_list;
271
272 static void set_init_lock(oop java_class, oop init_lock);
273 static void set_protection_domain(oop java_class, oop protection_domain);
274 static void set_class_loader(oop java_class, oop class_loader);
275 static void set_component_mirror(oop java_class, oop comp_mirror);
276 static void initialize_mirror_fields(InstanceKlass* ik, Handle mirror, Handle protection_domain,
277 Handle classData, TRAPS);
278 static void set_mirror_module_field(JavaThread* current, Klass* K, Handle mirror, Handle module);
279 static void set_is_identity(oop java_class, bool value);
280
281 static void set_modifiers(oop java_class, u2 value);
282 static void set_raw_access_flags(oop java_class, u2 value);
283 static void set_is_primitive(oop java_class);
284 static void release_set_array_klass(oop java_class, Klass* klass);
285
286 public:
287 static void allocate_fixup_lists();
288 static void compute_offsets();
289
290 // Instance creation
291 static void allocate_mirror(Klass* k, bool is_scratch, Handle protection_domain, Handle classData,
292 Handle& mirror, Handle& comp_mirror, TRAPS); // returns mirror and comp_mirror
293 static void create_mirror(Klass* k, Handle class_loader, Handle module,
294 Handle protection_domain, Handle classData, TRAPS);
295 static void fixup_mirror(Klass* k, TRAPS);
296 static oop create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS);
297
298 // Archiving
299 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
300 static void create_scratch_mirror(Klass* k, TRAPS) NOT_CDS_JAVA_HEAP_RETURN;
301 static bool restore_archived_mirror(Klass *k, Handle class_loader, Handle module,
302 Handle protection_domain,
303 TRAPS) NOT_CDS_JAVA_HEAP_RETURN_(false);
304
305 static void fixup_module_field(Klass* k, Handle module);
306
307 // Conversion -- java_class must not be null. The return value is null only if java_class is a primitive type.
308 static Klass* as_Klass(oop java_class);
309 static InstanceKlass* as_InstanceKlass(oop java_class);
310
311 static void set_klass(oop java_class, Klass* klass);
312 static BasicType as_BasicType(oop java_class, Klass** reference_klass = nullptr);
313 static Symbol* as_signature(oop java_class, bool intern_if_not_found);
314 static void print_signature(oop java_class, outputStream *st);
315 static const char* as_external_name(oop java_class);
316 // Testing
317 static bool is_instance(oop obj);
318
319 static bool is_primitive(oop java_class);
320 static BasicType primitive_type(oop java_class);
321 static oop primitive_mirror(BasicType t);
322 static Klass* array_klass_acquire(oop java_class);
323
324 // compiler support for class operations
325 static int klass_offset() { CHECK_INIT(_klass_offset); }
326 static int array_klass_offset() { CHECK_INIT(_array_klass_offset); }
327
328 // Support for classRedefinedCount field
329 static int classRedefinedCount(oop the_class_mirror);
330 static void set_classRedefinedCount(oop the_class_mirror, int value);
331
332 // Support for embedded per-class oops
333 static oop protection_domain(oop java_class);
334 static oop init_lock(oop java_class);
335 static void clear_init_lock(oop java_class) {
336 set_init_lock(java_class, nullptr);
337 }
338 static oop component_mirror(oop java_class);
339 static int component_mirror_offset() { return _component_mirror_offset; }
340 static objArrayOop signers(oop java_class);
341 static oop class_data(oop java_class);
342 static void set_class_data(oop java_class, oop classData);
343 static int reflection_data_offset() { return _reflectionData_offset; }
344
345 static oop class_loader(oop java_class);
346 static void set_module(oop java_class, oop module);
347 static oop module(oop java_class);
348
349 static oop name(Handle java_class, TRAPS);
350
351 static oop source_file(oop java_class);
352 static void set_source_file(oop java_class, oop source_file);
353
354 static int modifiers(oop java_class);
355
356 static size_t oop_size(oop java_class);
357 static void set_oop_size(HeapWord* java_class, size_t size);
358 static int static_oop_field_count(oop java_class);
359 static void set_static_oop_field_count(oop java_class, int size);
360
361 static GrowableArray<Klass*>* fixup_mirror_list() {
362 return _fixup_mirror_list;
363 }
364 static void set_fixup_mirror_list(GrowableArray<Klass*>* v) {
365 _fixup_mirror_list = v;
366 }
367
368 static GrowableArray<Klass*>* fixup_module_field_list() {
369 return _fixup_module_field_list;
370 }
371 static void set_fixup_module_field_list(GrowableArray<Klass*>* v) {
372 _fixup_module_field_list = v;
373 }
374
375 // Debugging
376 friend class JavaClasses;
377 };
378
379 // Interface to java.lang.Thread objects
380
381 #define THREAD_INJECTED_FIELDS(macro) \
382 macro(java_lang_Thread, jvmti_thread_state, intptr_signature, false) \
383 macro(java_lang_Thread, vthread_transition_disable_count, int_signature, false) \
384 macro(java_lang_Thread, is_in_vthread_transition, bool_signature, false) \
385 JFR_ONLY(macro(java_lang_Thread, jfr_epoch, short_signature, false))
386
387 class java_lang_Thread : AllStatic {
388 friend class java_lang_VirtualThread;
389 friend class JVMCIVMStructs;
390 private:
391 // Note that for this class the layout changed between JDK1.2 and JDK1.3,
392 // so we compute the offsets at startup rather than hard-wiring them.
393 static int _holder_offset;
394 static int _name_offset;
395 static int _contextClassLoader_offset;
396 static int _eetop_offset;
397 static int _jvmti_thread_state_offset;
398 static int _vthread_transition_disable_count_offset;
399 static int _is_in_vthread_transition_offset;
400 static int _interrupted_offset;
401 static int _interruptLock_offset;
402 static int _tid_offset;
403 static int _continuation_offset;
404 static int _park_blocker_offset;
405 static int _scopedValueBindings_offset;
406 JFR_ONLY(static int _jfr_epoch_offset;)
407
408 static void compute_offsets();
409
410 public:
411 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
412
413 // Returns the JavaThread associated with the thread obj
414 static JavaThread* thread(oop java_thread);
415 static JavaThread* thread_acquire(oop java_thread);
416 // Set JavaThread for instance
417 static void set_thread(oop java_thread, JavaThread* thread);
418 static void release_set_thread(oop java_thread, JavaThread* thread);
419 // FieldHolder
420 static oop holder(oop java_thread);
421 // interruptLock
422 static oop interrupt_lock(oop java_thread);
423 // Interrupted status
424 static bool interrupted(oop java_thread);
425 static void set_interrupted(oop java_thread, bool val);
426 // Name
427 static oop name(oop java_thread);
428 static void set_name(oop java_thread, oop name);
429 // Priority
430 static ThreadPriority priority(oop java_thread);
431 static void set_priority(oop java_thread, ThreadPriority priority);
432 // Thread group
433 static oop threadGroup(oop java_thread);
434 // Alive (NOTE: this is not really a field, but provides the correct
435 // definition without doing a Java call)
436 static bool is_alive(oop java_thread);
437 // Daemon
438 static bool is_daemon(oop java_thread);
439 static void set_daemon(oop java_thread);
440 // Context ClassLoader
441 static oop context_class_loader(oop java_thread);
442 // Stack size hint
443 static jlong stackSize(oop java_thread);
444 // Thread ID
445 static int64_t thread_id(oop java_thread);
446 static ByteSize thread_id_offset();
447 // Continuation
448 static inline oop continuation(oop java_thread);
449
450 static JvmtiThreadState* jvmti_thread_state(oop java_thread);
451 static void set_jvmti_thread_state(oop java_thread, JvmtiThreadState* state);
452
453 static int vthread_transition_disable_count(oop java_thread);
454 static void inc_vthread_transition_disable_count(oop java_thread);
455 static void dec_vthread_transition_disable_count(oop java_thread);
456 static int vthread_transition_disable_count_offset() { return _vthread_transition_disable_count_offset; }
457
458 static bool is_in_vthread_transition(oop java_thread);
459 static void set_is_in_vthread_transition(oop java_thread, bool val);
460 static int is_in_vthread_transition_offset() { return _is_in_vthread_transition_offset; }
461
462 // Clear all scoped value bindings on error
463 static void clear_scopedValueBindings(oop java_thread);
464
465 // Blocker object responsible for thread parking
466 static oop park_blocker(oop java_thread);
467
468 // Write thread status info to threadStatus field of java.lang.Thread.
469 static void set_thread_status(oop java_thread_oop, JavaThreadStatus status);
470 // Read thread status info from threadStatus field of java.lang.Thread.
471 static JavaThreadStatus get_thread_status(oop java_thread_oop);
472
473 static const char* thread_status_name(oop java_thread_oop);
474
475 // Fill in current stack trace, can cause GC
476 static oop async_get_stack_trace(jobject jthread, TRAPS);
477
478 JFR_ONLY(static u2 jfr_epoch(oop java_thread);)
479 JFR_ONLY(static void set_jfr_epoch(oop java_thread, u2 epoch);)
480 JFR_ONLY(static int jfr_epoch_offset() { CHECK_INIT(_jfr_epoch_offset); })
481
482 // Debugging
483 friend class JavaClasses;
484 };
485
486 // Interface to java.lang.Thread$FieldHolder objects
487
488 class java_lang_Thread_FieldHolder : AllStatic {
489 private:
490 static int _group_offset;
491 static int _priority_offset;
492 static int _stackSize_offset;
493 static int _daemon_offset;
494 static int _thread_status_offset;
495
496 static void compute_offsets();
497
498 public:
499 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
500
501 static oop threadGroup(oop holder);
502
503 static ThreadPriority priority(oop holder);
504 static void set_priority(oop holder, ThreadPriority priority);
505
506 static jlong stackSize(oop holder);
507
508 static bool is_daemon(oop holder);
509 static void set_daemon(oop holder, bool val);
510
511 static void set_thread_status(oop holder, JavaThreadStatus status);
512 static JavaThreadStatus get_thread_status(oop holder);
513
514 friend class JavaClasses;
515 };
516
517 // Interface to java.lang.Thread$Constants objects
518
519 class java_lang_Thread_Constants : AllStatic {
520 private:
521 static int _static_VTHREAD_GROUP_offset;
522 static int _static_NOT_SUPPORTED_CLASSLOADER_offset;
523
524 static void compute_offsets();
525 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
526
527 public:
528 static oop get_VTHREAD_GROUP();
529
530 friend class JavaClasses;
531 };
532
533 // Interface to java.lang.ThreadGroup objects
534
535 class java_lang_ThreadGroup : AllStatic {
536 private:
537 static int _parent_offset;
538 static int _name_offset;
539 static int _maxPriority_offset;
540 static int _daemon_offset;
541
542 static void compute_offsets();
543 public:
544 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
545
546 // parent ThreadGroup
547 static oop parent(oop java_thread_group);
548 // name
549 static const char* name(oop java_thread_group);
550 // maxPriority in group
551 static ThreadPriority maxPriority(oop java_thread_group);
552 // Daemon
553 static bool is_daemon(oop java_thread_group);
554
555 // Debugging
556 friend class JavaClasses;
557 };
558
559
560 // Interface to java.lang.VirtualThread objects
561 #define VTHREAD_INJECTED_FIELDS(macro) \
562 macro(java_lang_VirtualThread, objectWaiter, intptr_signature, false)
563
564 class java_lang_VirtualThread : AllStatic {
565 private:
566 static int static_vthread_scope_offset;
567 static int _carrierThread_offset;
568 static int _continuation_offset;
569 static int _state_offset;
570 static int _next_offset;
571 static int _onWaitingList_offset;
572 static int _notified_offset;
573 static int _interruptible_wait_offset;
574 static int _recheckInterval_offset;
575 static int _timeout_offset;
576 static int _objectWaiter_offset;
577 JFR_ONLY(static int _jfr_epoch_offset;)
578 public:
579 enum {
580 NEW = 0,
581 STARTED = 1,
582 RUNNING = 2,
583 PARKING = 3,
584 PARKED = 4,
585 PINNED = 5,
586 TIMED_PARKING = 6,
587 TIMED_PARKED = 7,
588 TIMED_PINNED = 8,
589 UNPARKED = 9,
590 YIELDING = 10,
591 YIELDED = 11,
592 BLOCKING = 12,
593 BLOCKED = 13,
594 UNBLOCKED = 14,
595 WAITING = 15,
596 WAIT = 16, // waiting in Object.wait
597 TIMED_WAITING = 17,
598 TIMED_WAIT = 18, // waiting in timed-Object.wait
599 TERMINATED = 99,
600 };
601
602 static void compute_offsets();
603 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
604
605 // Testers
606 static bool is_subclass(Klass* klass) {
607 return klass->is_subclass_of(vmClasses::VirtualThread_klass());
608 }
609 static bool is_instance(oop obj);
610
611 static oop vthread_scope();
612 static oop carrier_thread(oop vthread);
613 static oop continuation(oop vthread);
614 static int state(oop vthread);
615 static void set_state(oop vthread, int state);
616 static int cmpxchg_state(oop vthread, int old_state, int new_state);
617 static oop next(oop vthread);
618 static void set_next(oop vthread, oop next_vthread);
619 static bool set_onWaitingList(oop vthread, OopHandle& list_head);
620 static jlong timeout(oop vthread);
621 static void set_timeout(oop vthread, jlong value);
622 static void set_notified(oop vthread, jboolean value);
623 static void set_interruptible_wait(oop vthread, jboolean value);
624 static bool is_preempted(oop vthread);
625 static JavaThreadStatus map_state_to_thread_status(int state);
626
627 static inline ObjectWaiter* objectWaiter(oop vthread);
628 static inline void set_objectWaiter(oop vthread, ObjectWaiter* waiter);
629 static ObjectMonitor* current_pending_monitor(oop vthread);
630 static ObjectMonitor* current_waiting_monitor(oop vthread);
631 };
632
633
634 // Interface to java.lang.Throwable objects
635
636 class java_lang_Throwable: AllStatic {
637 friend class BacktraceBuilder;
638 friend class BacktraceIterator;
639
640 private:
641 // Trace constants
642 enum {
643 trace_methods_offset = 0,
644 trace_bcis_offset = 1,
645 trace_mirrors_offset = 2,
646 trace_names_offset = 3,
647 trace_conts_offset = 4,
648 trace_next_offset = 5,
649 trace_hidden_offset = 6,
650 trace_size = 7,
651 trace_chunk_size = 32
652 };
653
654 static int _backtrace_offset;
655 static int _detailMessage_offset;
656 static int _stackTrace_offset;
657 static int _depth_offset;
658 static int _cause_offset;
659 static int _static_unassigned_stacktrace_offset;
660
661 // StackTrace (programmatic access, new since 1.4)
662 static void clear_stacktrace(oop throwable);
663 // Stacktrace (post JDK 1.7.0 to allow immutability protocol to be followed)
664 static void set_stacktrace(oop throwable, oop st_element_array);
665 static oop unassigned_stacktrace();
666
667 public:
668 // Backtrace
669 static oop backtrace(oop throwable);
670 static void set_backtrace(oop throwable, oop value);
671 static int depth(oop throwable);
672 static void set_depth(oop throwable, int value);
673 // Message
674 static int get_detailMessage_offset() { CHECK_INIT(_detailMessage_offset); }
675 static oop message(oop throwable);
676 static const char* message_as_utf8(oop throwable);
677 static void set_message(oop throwable, oop value);
678
679 static oop cause(oop throwable);
680
681 static void print_stack_element(outputStream *st, Method* method, int bci);
682
683 static void compute_offsets();
684 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
685
686 // Allocate space for backtrace (created but stack trace not filled in)
687 static void allocate_backtrace(Handle throwable, TRAPS);
688 // Fill in current stack trace for throwable with preallocated backtrace (no GC)
689 static void fill_in_stack_trace_of_preallocated_backtrace(Handle throwable);
690 // Fill in current stack trace, can cause GC
691 static void fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS);
692 static void fill_in_stack_trace(Handle throwable, const methodHandle& method = methodHandle());
693
694 // Programmatic access to stack trace
695 static void get_stack_trace_elements(int depth, Handle backtrace, objArrayHandle stack_trace, TRAPS);
696
697 // For recreating class initialization error exceptions.
698 static Handle create_initialization_error(JavaThread* current, Handle throwable);
699
700 // Printing
701 static void print(oop throwable, outputStream* st);
702 static void print_stack_trace(Handle throwable, outputStream* st);
703 static void java_printStackTrace(Handle throwable, TRAPS);
704 // Debugging
705 friend class JavaClasses;
706 // Gets the method and bci of the top frame (TOS). Returns false if this failed.
707 static bool get_top_method_and_bci(oop throwable, Method** method, int* bci);
708 };
709
710
711 // Interface to java.lang.reflect.AccessibleObject objects
712
713 class java_lang_reflect_AccessibleObject: AllStatic {
714 private:
715 // Note that to reduce dependencies on the JDK we compute these
716 // offsets at run-time.
717 static int _override_offset;
718
719 static void compute_offsets();
720
721 public:
722 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
723
724 // Accessors
725 static jboolean override(oop reflect);
726 static void set_override(oop reflect, jboolean value);
727
728 // Debugging
729 friend class JavaClasses;
730 };
731
732
733 // Interface to java.lang.reflect.Method objects
734
735 class java_lang_reflect_Method : public java_lang_reflect_AccessibleObject {
736 private:
737 // Note that to reduce dependencies on the JDK we compute these
738 // offsets at run-time.
739 static int _clazz_offset;
740 static int _name_offset;
741 static int _returnType_offset;
742 static int _parameterTypes_offset;
743 static int _exceptionTypes_offset;
744 static int _slot_offset;
745 static int _modifiers_offset;
746 static int _signature_offset;
747 static int _annotations_offset;
748 static int _parameter_annotations_offset;
749 static int _annotation_default_offset;
750
751 static void compute_offsets();
752 public:
753 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
754
755 // Allocation
756 static Handle create(TRAPS);
757
758 // Accessors
759 static oop clazz(oop reflect);
760 static void set_clazz(oop reflect, oop value);
761
762 static void set_name(oop method, oop value);
763
764 static oop return_type(oop method);
765 static void set_return_type(oop method, oop value);
766
767 static oop parameter_types(oop method);
768 static void set_parameter_types(oop method, oop value);
769
770 static int slot(oop reflect);
771 static void set_slot(oop reflect, int value);
772
773 static void set_exception_types(oop method, oop value);
774 static void set_modifiers(oop method, int value);
775 static void set_signature(oop method, oop value);
776 static void set_annotations(oop method, oop value);
777 static void set_parameter_annotations(oop method, oop value);
778 static void set_annotation_default(oop method, oop value);
779
780 // Debugging
781 friend class JavaClasses;
782 };
783
784
785 // Interface to java.lang.reflect.Constructor objects
786
787 class java_lang_reflect_Constructor : public java_lang_reflect_AccessibleObject {
788 private:
789 // Note that to reduce dependencies on the JDK we compute these
790 // offsets at run-time.
791 static int _clazz_offset;
792 static int _parameterTypes_offset;
793 static int _exceptionTypes_offset;
794 static int _slot_offset;
795 static int _modifiers_offset;
796 static int _signature_offset;
797 static int _annotations_offset;
798 static int _parameter_annotations_offset;
799
800 static void compute_offsets();
801 public:
802 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
803
804 // Allocation
805 static Handle create(TRAPS);
806
807 // Accessors
808 static oop clazz(oop reflect);
809 static void set_clazz(oop reflect, oop value);
810
811 static oop parameter_types(oop constructor);
812 static void set_parameter_types(oop constructor, oop value);
813
814 static int slot(oop reflect);
815 static void set_slot(oop reflect, int value);
816
817 static void set_exception_types(oop constructor, oop value);
818 static void set_modifiers(oop constructor, int value);
819 static void set_signature(oop constructor, oop value);
820 static void set_annotations(oop constructor, oop value);
821 static void set_parameter_annotations(oop method, oop value);
822
823 // Debugging
824 friend class JavaClasses;
825 };
826
827
828 // Interface to java.lang.reflect.Field objects
829
830 class java_lang_reflect_Field : public java_lang_reflect_AccessibleObject {
831 private:
832 // Note that to reduce dependencies on the JDK we compute these
833 // offsets at run-time.
834 static int _clazz_offset;
835 static int _name_offset;
836 static int _type_offset;
837 static int _slot_offset;
838 static int _modifiers_offset;
839 static int _flags_offset;
840 static int _signature_offset;
841 static int _annotations_offset;
842
843 static void compute_offsets();
844
845 public:
846 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
847
848 // Allocation
849 static Handle create(TRAPS);
850
851 // Accessors
852 static oop clazz(oop reflect);
853 static void set_clazz(oop reflect, oop value);
854
855 static oop name(oop field);
856 static void set_name(oop field, oop value);
857
858 static oop type(oop field);
859 static void set_type(oop field, oop value);
860
861 static int slot(oop reflect);
862 static void set_slot(oop reflect, int value);
863
864 static int modifiers(oop field);
865 static void set_modifiers(oop field, int value);
866
867 static void set_flags(oop field, int value);
868
869 static void set_signature(oop constructor, oop value);
870 static void set_annotations(oop constructor, oop value);
871
872 // Debugging
873 friend class JavaClasses;
874 };
875
876 class java_lang_reflect_Parameter {
877 private:
878 // Note that to reduce dependencies on the JDK we compute these
879 // offsets at run-time.
880 static int _name_offset;
881 static int _modifiers_offset;
882 static int _index_offset;
883 static int _executable_offset;
884
885 static void compute_offsets();
886
887 public:
888 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
889
890 // Allocation
891 static Handle create(TRAPS);
892
893 // Accessors
894 static oop name(oop field);
895 static void set_name(oop field, oop value);
896
897 static int index(oop reflect);
898 static void set_index(oop reflect, int value);
899
900 static int modifiers(oop reflect);
901 static void set_modifiers(oop reflect, int value);
902
903 static oop executable(oop constructor);
904 static void set_executable(oop constructor, oop value);
905
906 friend class JavaClasses;
907 };
908
909 #define MODULE_INJECTED_FIELDS(macro) \
910 macro(java_lang_Module, module_entry, intptr_signature, false)
911
912 class java_lang_Module {
913 private:
914 static int _loader_offset;
915 static int _name_offset;
916 static int _module_entry_offset;
917
918 static void compute_offsets();
919
920 public:
921 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
922
923 // Allocation
924 static Handle create(Handle loader, Handle module_name, TRAPS);
925
926 // Testers
927 static bool is_instance(oop obj);
928
929 // Accessors
930 static oop loader(oop module);
931 static void set_loader(oop module, oop value);
932
933 // CDS
934 static int module_entry_offset() { return _module_entry_offset; }
935
936 static oop name(oop module);
937 static void set_name(oop module, oop value);
938
939 static ModuleEntry* module_entry(oop module);
940 static ModuleEntry* module_entry_raw(oop module);
941 static void set_module_entry(oop module, ModuleEntry* module_entry);
942
943 friend class JavaClasses;
944 };
945
946 #define CONSTANTPOOL_INJECTED_FIELDS(macro) \
947 macro(reflect_ConstantPool, vmholder, object_signature, false)
948
949 // Interface to jdk.internal.reflect.ConstantPool objects
950 class reflect_ConstantPool {
951 private:
952 // Note that to reduce dependencies on the JDK we compute these
953 // offsets at run-time. This field is the oop offset for the
954 // actual constant pool, previously called constantPoolOop.
955 static int _vmholder_offset;
956
957 static void compute_offsets();
958
959 public:
960 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
961
962 // Allocation
963 static Handle create(TRAPS);
964
965 // Accessors
966 static void set_cp(oop reflect, ConstantPool* value);
967
968 static ConstantPool* get_cp(oop reflect);
969
970 // Debugging
971 friend class JavaClasses;
972 };
973
974
975 // Interface to java.lang primitive type boxing objects:
976 // - java.lang.Boolean
977 // - java.lang.Character
978 // - java.lang.Float
979 // - java.lang.Double
980 // - java.lang.Byte
981 // - java.lang.Short
982 // - java.lang.Integer
983 // - java.lang.Long
984
985 // This could be separated out into 8 individual classes.
986
987 class java_lang_boxing_object: AllStatic {
988 private:
989 static int* _offsets;
990
991 static void compute_offsets();
992 static oop initialize_and_allocate(BasicType type, TRAPS);
993 public:
994 // Allocation. Returns a boxed value, or null for invalid type.
995 static oop create(BasicType type, jvalue* value, TRAPS);
996 // Accessors. Returns the basic type being boxed, or T_ILLEGAL for invalid oop.
997 static BasicType get_value(oop box, jvalue* value);
998 static BasicType set_value(oop box, jvalue* value);
999 static BasicType basic_type(oop box);
1000 static bool is_instance(oop box) { return basic_type(box) != T_ILLEGAL; }
1001 static bool is_instance(oop box, BasicType type) { return basic_type(box) == type; }
1002 static void print(oop box, outputStream* st) { jvalue value; print(get_value(box, &value), &value, st); }
1003 static void print(BasicType type, jvalue* value, outputStream* st);
1004
1005 static int value_offset(BasicType type) {
1006 assert(type >= T_BOOLEAN && type <= T_LONG, "BasicType out of range");
1007 assert(_offsets != nullptr, "Uninitialized offsets");
1008 return _offsets[type - T_BOOLEAN];
1009 }
1010
1011 static void serialize_offsets(SerializeClosure* f);
1012
1013 // Debugging
1014 friend class JavaClasses;
1015 };
1016
1017
1018
1019 // Interface to java.lang.ref.Reference objects
1020
1021 class java_lang_ref_Reference: AllStatic {
1022 static int _referent_offset;
1023 static int _queue_offset;
1024 static int _next_offset;
1025 static int _discovered_offset;
1026
1027 static bool _offsets_initialized;
1028
1029 public:
1030 // Accessors
1031 static inline oop weak_referent_no_keepalive(oop ref);
1032 static inline oop weak_referent(oop ref);
1033 static inline oop phantom_referent_no_keepalive(oop ref);
1034 static inline oop unknown_referent_no_keepalive(oop ref);
1035 static inline void clear_referent(oop ref);
1036 static inline void clear_referent_raw(oop ref);
1037 static inline HeapWord* referent_addr_raw(oop ref);
1038 static inline oop next(oop ref);
1039 static inline void set_next(oop ref, oop value);
1040 static inline void set_next_raw(oop ref, oop value);
1041 static inline HeapWord* next_addr_raw(oop ref);
1042 static inline oop discovered(oop ref);
1043 static inline void set_discovered(oop ref, oop value);
1044 static inline void set_discovered_raw(oop ref, oop value);
1045 static inline HeapWord* discovered_addr_raw(oop ref);
1046 static bool is_referent_field(oop obj, ptrdiff_t offset);
1047 static inline bool is_final(oop ref);
1048 static inline bool is_phantom(oop ref);
1049 static inline bool is_weak(oop ref);
1050 static inline bool is_soft(oop ref);
1051
1052 static int referent_offset() { CHECK_INIT(_referent_offset); }
1053 static int queue_offset() { CHECK_INIT(_queue_offset); }
1054 static int next_offset() { CHECK_INIT(_next_offset); }
1055 static int discovered_offset() { CHECK_INIT(_discovered_offset); }
1056
1057 static void compute_offsets();
1058 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1059 };
1060
1061
1062 // Interface to java.lang.ref.SoftReference objects
1063
1064 class java_lang_ref_SoftReference: public java_lang_ref_Reference {
1065 static int _timestamp_offset;
1066 static int _static_clock_offset;
1067
1068 public:
1069 // Accessors
1070 static jlong timestamp(oop ref);
1071
1072 // Accessors for statics
1073 static jlong clock();
1074 static void set_clock(jlong value);
1075
1076 static void compute_offsets();
1077 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1078 };
1079
1080 // Interface to java.lang.invoke.MethodHandle objects
1081
1082 class java_lang_invoke_MethodHandle: AllStatic {
1083 friend class JavaClasses;
1084
1085 private:
1086 static int _type_offset; // the MethodType of this MH
1087 static int _form_offset; // the LambdaForm of this MH
1088
1089 static void compute_offsets();
1090
1091 public:
1092 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1093
1094 // Accessors
1095 static oop type(oop mh);
1096 static void set_type(oop mh, oop mtype);
1097
1098 static oop form(oop mh);
1099 static void set_form(oop mh, oop lform);
1100
1101 // Testers
1102 static bool is_subclass(Klass* klass) {
1103 return klass->is_subclass_of(vmClasses::MethodHandle_klass());
1104 }
1105 static bool is_instance(oop obj);
1106
1107 // Accessors for code generation:
1108 static int type_offset() { CHECK_INIT(_type_offset); }
1109 static int form_offset() { CHECK_INIT(_form_offset); }
1110 };
1111
1112 // Interface to java.lang.invoke.DirectMethodHandle objects
1113
1114 class java_lang_invoke_DirectMethodHandle: AllStatic {
1115 friend class JavaClasses;
1116
1117 private:
1118 static int _member_offset; // the MemberName of this DMH
1119
1120 static void compute_offsets();
1121
1122 public:
1123 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1124
1125 // Accessors
1126 static oop member(oop mh);
1127
1128 // Testers
1129 static bool is_subclass(Klass* klass) {
1130 return klass->is_subclass_of(vmClasses::DirectMethodHandle_klass());
1131 }
1132 static bool is_instance(oop obj);
1133
1134 // Accessors for code generation:
1135 static int member_offset() { CHECK_INIT(_member_offset); }
1136 };
1137
1138 // Interface to java.lang.invoke.LambdaForm objects
1139 // (These are a private interface for managing adapter code generation.)
1140
1141 class java_lang_invoke_LambdaForm: AllStatic {
1142 friend class JavaClasses;
1143
1144 private:
1145 static int _vmentry_offset; // type is MemberName
1146
1147 static void compute_offsets();
1148
1149 public:
1150 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1151
1152 // Accessors
1153 static oop vmentry(oop lform);
1154
1155 // Testers
1156 static bool is_subclass(Klass* klass) {
1157 return vmClasses::LambdaForm_klass() != nullptr &&
1158 klass->is_subclass_of(vmClasses::LambdaForm_klass());
1159 }
1160 static bool is_instance(oop obj);
1161
1162 // Accessors for code generation:
1163 static int vmentry_offset() { CHECK_INIT(_vmentry_offset); }
1164 };
1165
1166 // Interface to java.lang.invoke.NativeEntryPoint objects
1167 // (These are a private interface for managing adapter code generation.)
1168
1169 class jdk_internal_foreign_abi_NativeEntryPoint: AllStatic {
1170 friend class JavaClasses;
1171
1172 private:
1173 static int _method_type_offset;
1174 static int _downcall_stub_address_offset;
1175
1176 static void compute_offsets();
1177
1178 public:
1179 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1180
1181 // Accessors
1182 static oop method_type(oop entry);
1183 static jlong downcall_stub_address(oop entry);
1184
1185 // Accessors for code generation:
1186 static int method_type_offset_in_bytes() { return _method_type_offset; }
1187 static int downcall_stub_address_offset_in_bytes() { return _downcall_stub_address_offset; }
1188 };
1189
1190 class jdk_internal_foreign_abi_ABIDescriptor: AllStatic {
1191 friend class JavaClasses;
1192
1193 private:
1194 static int _inputStorage_offset;
1195 static int _outputStorage_offset;
1196 static int _volatileStorage_offset;
1197 static int _stackAlignment_offset;
1198 static int _shadowSpace_offset;
1199 static int _scratch1_offset;
1200 static int _scratch2_offset;
1201
1202 static void compute_offsets();
1203
1204 public:
1205 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1206
1207 // Accessors
1208 static objArrayOop inputStorage(oop entry);
1209 static objArrayOop outputStorage(oop entry);
1210 static objArrayOop volatileStorage(oop entry);
1211 static jint stackAlignment(oop entry);
1212 static jint shadowSpace(oop entry);
1213 static oop scratch1(oop entry);
1214 static oop scratch2(oop entry);
1215 };
1216
1217 class jdk_internal_foreign_abi_VMStorage: AllStatic {
1218 friend class JavaClasses;
1219
1220 private:
1221 static int _type_offset;
1222 static int _indexOrOffset_offset;
1223 static int _segmentMaskOrSize_offset;
1224 static int _debugName_offset;
1225
1226 static void compute_offsets();
1227
1228 public:
1229 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1230
1231 // Accessors
1232 static jbyte type(oop entry);
1233 static jint index_or_offset(oop entry);
1234 static jshort segment_mask_or_size(oop entry);
1235 static oop debugName(oop entry);
1236
1237 // Testers
1238 static bool is_subclass(Klass* klass) {
1239 return vmClasses::VMStorage_klass() != nullptr &&
1240 klass->is_subclass_of(vmClasses::VMStorage_klass());
1241 }
1242 static bool is_instance(oop obj);
1243 };
1244
1245 class jdk_internal_foreign_abi_CallConv: AllStatic {
1246 friend class JavaClasses;
1247
1248 private:
1249 static int _argRegs_offset;
1250 static int _retRegs_offset;
1251
1252 static void compute_offsets();
1253
1254 public:
1255 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1256
1257 // Accessors
1258 static refArrayOop argRegs(oop entry);
1259 static refArrayOop retRegs(oop entry);
1260
1261 // Testers
1262 static bool is_subclass(Klass* klass) {
1263 return vmClasses::CallConv_klass() != nullptr &&
1264 klass->is_subclass_of(vmClasses::CallConv_klass());
1265 }
1266 static bool is_instance(oop obj);
1267 };
1268
1269 // Interface to java.lang.invoke.MemberName objects
1270 // (These are a private interface for Java code to query the class hierarchy.)
1271
1272 #define RESOLVEDMETHOD_INJECTED_FIELDS(macro) \
1273 macro(java_lang_invoke_ResolvedMethodName, vmtarget, intptr_signature, false)
1274
1275 class java_lang_invoke_ResolvedMethodName : AllStatic {
1276 friend class JavaClasses;
1277
1278 static int _vmtarget_offset;
1279 static int _vmholder_offset;
1280
1281 static void compute_offsets();
1282 public:
1283 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1284
1285 static int vmtarget_offset() { CHECK_INIT(_vmtarget_offset); }
1286
1287 static Method* vmtarget(oop resolved_method);
1288 static void set_vmtarget(oop resolved_method, Method* method);
1289
1290 static void set_vmholder(oop resolved_method, oop holder);
1291
1292 // find or create resolved member name
1293 static oop find_resolved_method(const methodHandle& m, TRAPS);
1294
1295 static bool is_instance(oop resolved_method);
1296 };
1297
1298
1299 #define MEMBERNAME_INJECTED_FIELDS(macro) \
1300 macro(java_lang_invoke_MemberName, vmindex, intptr_signature, false)
1301
1302
1303 class java_lang_invoke_MemberName: AllStatic {
1304 friend class JavaClasses;
1305
1306 private:
1307 // From java.lang.invoke.MemberName:
1308 // private Class<?> clazz; // class in which the method is defined
1309 // private String name; // may be null if not yet materialized
1310 // private Object type; // may be null if not yet materialized
1311 // private int flags; // modifier bits; see reflect.Modifier
1312 // private ResolvedMethodName method; // holds VM-specific target value
1313 // private intptr_t vmindex; // member index within class or interface
1314 static int _clazz_offset;
1315 static int _name_offset;
1316 static int _type_offset;
1317 static int _flags_offset;
1318 static int _method_offset;
1319 static int _vmindex_offset;
1320
1321 static void compute_offsets();
1322
1323 public:
1324 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1325 // Accessors
1326 static oop clazz(oop mname);
1327 static void set_clazz(oop mname, oop clazz);
1328
1329 static oop type(oop mname);
1330 static void set_type(oop mname, oop type);
1331
1332 static oop name(oop mname);
1333 static void set_name(oop mname, oop name);
1334
1335 static int flags(oop mname);
1336 static void set_flags(oop mname, int flags);
1337
1338 // Link through ResolvedMethodName field to get Method*
1339 static Method* vmtarget(oop mname);
1340 static void set_method(oop mname, oop method);
1341
1342 static intptr_t vmindex(oop mname);
1343 static void set_vmindex(oop mname, intptr_t index);
1344
1345 // Testers
1346 static bool is_subclass(Klass* klass) {
1347 return klass->is_subclass_of(vmClasses::MemberName_klass());
1348 }
1349 static bool is_instance(oop obj);
1350
1351 static bool is_method(oop obj);
1352
1353 // Relevant integer codes (keep these in synch. with MethodHandleNatives.Constants):
1354 enum {
1355 MN_IS_METHOD = 0x00010000, // method (not constructor)
1356 MN_IS_OBJECT_CONSTRUCTOR = 0x00020000, // constructor
1357 MN_IS_FIELD = 0x00040000, // field
1358 MN_IS_TYPE = 0x00080000, // nested type
1359 MN_CALLER_SENSITIVE = 0x00100000, // @CallerSensitive annotation detected
1360 MN_TRUSTED_FINAL = 0x00200000, // trusted final field
1361 MN_HIDDEN_MEMBER = 0x00400000, // @Hidden annotation detected
1362 MN_NULL_RESTRICTED_FIELD = 0x00800000, // null-restricted field
1363 MN_REFERENCE_KIND_SHIFT = 24, // refKind
1364 MN_REFERENCE_KIND_MASK = 0x0F000000 >> MN_REFERENCE_KIND_SHIFT, // 4 bits
1365 MN_LAYOUT_SHIFT = 28, // field layout
1366 MN_LAYOUT_MASK = 0x70000000 >> MN_LAYOUT_SHIFT, // 3 bits
1367 MN_NESTMATE_CLASS = 0x00000001,
1368 MN_HIDDEN_CLASS = 0x00000002,
1369 MN_STRONG_LOADER_LINK = 0x00000004,
1370 MN_ACCESS_VM_ANNOTATIONS = 0x00000008,
1371 // Lookup modes
1372 MN_MODULE_MODE = 0x00000010,
1373 MN_UNCONDITIONAL_MODE = 0x00000020,
1374 MN_TRUSTED_MODE = -1
1375 };
1376
1377 // Accessors for code generation:
1378 static int clazz_offset() { CHECK_INIT(_clazz_offset); }
1379 static int type_offset() { CHECK_INIT(_type_offset); }
1380 static int flags_offset() { CHECK_INIT(_flags_offset); }
1381 static int method_offset() { CHECK_INIT(_method_offset); }
1382 static int vmindex_offset() { CHECK_INIT(_vmindex_offset); }
1383 };
1384
1385
1386 // Interface to java.lang.invoke.MethodType objects
1387
1388 class java_lang_invoke_MethodType: AllStatic {
1389 friend class JavaClasses;
1390
1391 private:
1392 static int _rtype_offset;
1393 static int _ptypes_offset;
1394
1395 static void compute_offsets();
1396
1397 public:
1398 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1399 // Accessors
1400 static oop rtype(oop mt);
1401 static objArrayOop ptypes(oop mt);
1402
1403 static oop ptype(oop mt, int index);
1404 static int ptype_count(oop mt);
1405
1406 static int ptype_slot_count(oop mt); // extra counts for long/double
1407 static int rtype_slot_count(oop mt); // extra counts for long/double
1408
1409 static Symbol* as_signature(oop mt, bool intern_if_not_found);
1410 static void print_signature(oop mt, outputStream* st);
1411
1412 static bool is_instance(oop obj);
1413
1414 static bool equals(oop mt1, oop mt2);
1415
1416 // Accessors for code generation:
1417 static int rtype_offset() { CHECK_INIT(_rtype_offset); }
1418 static int ptypes_offset() { CHECK_INIT(_ptypes_offset); }
1419 };
1420
1421
1422 // Interface to java.lang.invoke.CallSite objects
1423 #define CALLSITE_INJECTED_FIELDS(macro) \
1424 macro(java_lang_invoke_CallSite, vmdependencies, intptr_signature, false) \
1425 macro(java_lang_invoke_CallSite, last_cleanup, long_signature, false)
1426
1427 class java_lang_invoke_CallSite: AllStatic {
1428 friend class JavaClasses;
1429
1430 private:
1431 static int _target_offset;
1432 static int _vmdependencies_offset;
1433 static int _last_cleanup_offset;
1434
1435 static void compute_offsets();
1436
1437 public:
1438 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1439 // Accessors
1440 static oop target( oop site);
1441 static void set_target( oop site, oop target);
1442 static void set_target_volatile( oop site, oop target);
1443
1444 static DependencyContext vmdependencies(oop call_site);
1445
1446 // Testers
1447 static bool is_subclass(Klass* klass) {
1448 return klass->is_subclass_of(vmClasses::CallSite_klass());
1449 }
1450 static bool is_instance(oop obj);
1451
1452 // Accessors for code generation:
1453 static int target_offset() { CHECK_INIT(_target_offset); }
1454 };
1455
1456 // Interface to java.lang.invoke.ConstantCallSite objects
1457
1458 class java_lang_invoke_ConstantCallSite: AllStatic {
1459 friend class JavaClasses;
1460
1461 private:
1462 static int _is_frozen_offset;
1463
1464 static void compute_offsets();
1465
1466 public:
1467 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1468 // Accessors
1469 static jboolean is_frozen(oop site);
1470
1471 // Testers
1472 static bool is_subclass(Klass* klass) {
1473 return klass->is_subclass_of(vmClasses::ConstantCallSite_klass());
1474 }
1475 static bool is_instance(oop obj);
1476 };
1477
1478 // Interface to java.lang.ClassLoader objects
1479
1480 #define CLASSLOADER_INJECTED_FIELDS(macro) \
1481 macro(java_lang_ClassLoader, loader_data, intptr_signature, false)
1482
1483 class java_lang_ClassLoader : AllStatic {
1484 private:
1485 static int _loader_data_offset;
1486 static int _parent_offset;
1487 static int _parallelCapable_offset;
1488 static int _name_offset;
1489 static int _nameAndId_offset;
1490 static int _unnamedModule_offset;
1491
1492 static void compute_offsets();
1493
1494 public:
1495 // Support for CDS
1496 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1497 static int loader_data_offset() { return _loader_data_offset; }
1498
1499 static ClassLoaderData* loader_data_acquire(oop loader);
1500 static ClassLoaderData* loader_data(oop loader);
1501 static void release_set_loader_data(oop loader, ClassLoaderData* new_data);
1502
1503 static oop parent(oop loader);
1504 static oop parent_no_keepalive(oop loader);
1505 static oop name(oop loader);
1506 static oop nameAndId(oop loader);
1507 static bool isAncestor(oop loader, oop cl);
1508
1509 // Support for parallelCapable field
1510 static bool parallelCapable(oop the_class_mirror);
1511
1512 static bool is_trusted_loader(oop loader);
1513
1514 // Testers
1515 static bool is_subclass(Klass* klass) {
1516 return klass->is_subclass_of(vmClasses::ClassLoader_klass());
1517 }
1518 static bool is_instance(oop obj);
1519
1520 static oop unnamedModule(oop loader);
1521
1522 // Debugging
1523 friend class JavaClasses;
1524 };
1525
1526
1527 // Interface to java.lang.System objects
1528
1529 class java_lang_System : AllStatic {
1530 private:
1531 static int _static_in_offset;
1532 static int _static_out_offset;
1533 static int _static_err_offset;
1534
1535 public:
1536 static int in_offset() { CHECK_INIT(_static_in_offset); }
1537 static int out_offset() { CHECK_INIT(_static_out_offset); }
1538 static int err_offset() { CHECK_INIT(_static_err_offset); }
1539
1540 static void compute_offsets();
1541 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1542
1543 // Debugging
1544 friend class JavaClasses;
1545 };
1546
1547
1548 // Interface to java.lang.StackTraceElement objects
1549
1550 class java_lang_StackTraceElement: AllStatic {
1551 private:
1552 static int _declaringClassObject_offset;
1553 static int _classLoaderName_offset;
1554 static int _moduleName_offset;
1555 static int _moduleVersion_offset;
1556 static int _declaringClass_offset;
1557 static int _methodName_offset;
1558 static int _fileName_offset;
1559 static int _lineNumber_offset;
1560
1561 // Setters
1562 static void set_classLoaderName(oop element, oop value);
1563 static void set_moduleName(oop element, oop value);
1564 static void set_moduleVersion(oop element, oop value);
1565 static void set_declaringClass(oop element, oop value);
1566 static void set_methodName(oop element, oop value);
1567 static void set_fileName(oop element, oop value);
1568 static void set_lineNumber(oop element, int value);
1569 static void set_declaringClassObject(oop element, oop value);
1570
1571 static void decode_file_and_line(Handle java_mirror, InstanceKlass* holder, int version,
1572 const methodHandle& method, int bci,
1573 Symbol*& source, oop& source_file, int& line_number, TRAPS);
1574
1575 public:
1576 // Create an instance of StackTraceElement
1577 static oop create(const methodHandle& method, int bci, TRAPS);
1578
1579 static void fill_in(Handle element, InstanceKlass* holder, const methodHandle& method,
1580 int version, int bci, Symbol* name, TRAPS);
1581
1582 static void compute_offsets();
1583 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1584
1585 #if INCLUDE_JVMCI
1586 static void decode(const methodHandle& method, int bci, Symbol*& fileName, int& lineNumber, TRAPS);
1587 #endif
1588
1589 // Debugging
1590 friend class JavaClasses;
1591 };
1592
1593
1594 class Backtrace: AllStatic {
1595 public:
1596 // Helper backtrace functions to store bci|version together.
1597 static int merge_bci_and_version(int bci, int version);
1598 static int merge_mid_and_cpref(int mid, int cpref);
1599 static int bci_at(unsigned int merged);
1600 static int version_at(unsigned int merged);
1601 static int mid_at(unsigned int merged);
1602 static int cpref_at(unsigned int merged);
1603 static int get_line_number(Method* method, int bci);
1604 static Symbol* get_source_file_name(InstanceKlass* holder, int version);
1605
1606 // Debugging
1607 friend class JavaClasses;
1608 };
1609
1610 class java_lang_ClassFrameInfo: AllStatic {
1611 private:
1612 static int _classOrMemberName_offset;
1613 static int _flags_offset;
1614
1615 public:
1616 static oop classOrMemberName(oop info);
1617 static int flags(oop info);
1618
1619 // Setters
1620 static void init_class(Handle stackFrame, const methodHandle& m);
1621 static void init_method(Handle stackFrame, const methodHandle& m, TRAPS);
1622
1623 static void compute_offsets();
1624 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1625
1626 // Debugging
1627 friend class JavaClasses;
1628 };
1629
1630 // Interface to java.lang.StackFrameInfo objects
1631
1632 #define STACKFRAMEINFO_INJECTED_FIELDS(macro) \
1633 macro(java_lang_StackFrameInfo, version, short_signature, false)
1634
1635 class java_lang_StackFrameInfo: AllStatic {
1636 private:
1637 static int _type_offset;
1638 static int _name_offset;
1639 static int _bci_offset;
1640 static int _version_offset;
1641 static int _contScope_offset;
1642
1643 public:
1644 // Getters
1645 static oop name(oop info);
1646 static oop type(oop info);
1647 static Method* get_method(oop info);
1648
1649 // Setters
1650 static void set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, oop cont, TRAPS);
1651 static void set_name(oop info, oop value);
1652 static void set_type(oop info, oop value);
1653 static void set_bci(oop info, int value);
1654
1655 static void set_version(oop info, short value);
1656 static void set_contScope(oop info, oop value);
1657
1658 static void compute_offsets();
1659 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1660
1661 static void to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS);
1662
1663 // Debugging
1664 friend class JavaClasses;
1665 };
1666
1667 class java_lang_LiveStackFrameInfo: AllStatic {
1668 private:
1669 static int _monitors_offset;
1670 static int _locals_offset;
1671 static int _operands_offset;
1672 static int _mode_offset;
1673
1674 public:
1675 static void set_monitors(oop info, oop value);
1676 static void set_locals(oop info, oop value);
1677 static void set_operands(oop info, oop value);
1678 static void set_mode(oop info, int value);
1679
1680 static void compute_offsets();
1681 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1682
1683 // Debugging
1684 friend class JavaClasses;
1685 };
1686
1687 // Interface to java.lang.reflect.RecordComponent objects
1688
1689 class java_lang_reflect_RecordComponent: AllStatic {
1690 private:
1691 static int _clazz_offset;
1692 static int _name_offset;
1693 static int _type_offset;
1694 static int _accessor_offset;
1695 static int _signature_offset;
1696 static int _annotations_offset;
1697 static int _typeAnnotations_offset;
1698
1699 // Setters
1700 static void set_clazz(oop element, oop value);
1701 static void set_name(oop element, oop value);
1702 static void set_type(oop element, oop value);
1703 static void set_accessor(oop element, oop value);
1704 static void set_signature(oop element, oop value);
1705 static void set_annotations(oop element, oop value);
1706 static void set_typeAnnotations(oop element, oop value);
1707
1708 public:
1709 // Create an instance of RecordComponent
1710 static oop create(InstanceKlass* holder, RecordComponent* component, TRAPS);
1711
1712 static void compute_offsets();
1713 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1714
1715 // Debugging
1716 friend class JavaClasses;
1717 };
1718
1719
1720 // Interface to java.lang.AssertionStatusDirectives objects
1721
1722 class java_lang_AssertionStatusDirectives: AllStatic {
1723 private:
1724 static int _classes_offset;
1725 static int _classEnabled_offset;
1726 static int _packages_offset;
1727 static int _packageEnabled_offset;
1728 static int _deflt_offset;
1729
1730 public:
1731 // Setters
1732 static void set_classes(oop obj, oop val);
1733 static void set_classEnabled(oop obj, oop val);
1734 static void set_packages(oop obj, oop val);
1735 static void set_packageEnabled(oop obj, oop val);
1736 static void set_deflt(oop obj, bool val);
1737
1738 static void compute_offsets();
1739 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1740
1741 // Debugging
1742 friend class JavaClasses;
1743 };
1744
1745
1746 class java_util_concurrent_locks_AbstractOwnableSynchronizer : AllStatic {
1747 private:
1748 static int _owner_offset;
1749 public:
1750 static void compute_offsets();
1751 static oop get_owner_threadObj(oop obj);
1752 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1753 };
1754
1755 // Interface to jdk.internal.misc.UnsafeConsants
1756
1757 class jdk_internal_misc_UnsafeConstants : AllStatic {
1758 public:
1759 static void set_unsafe_constants();
1760 static void compute_offsets() { }
1761 static void serialize_offsets(SerializeClosure* f) { }
1762 };
1763
1764 // Interface to jdk.internal.vm.vector.VectorSupport.VectorPayload objects
1765
1766 class vector_VectorPayload : AllStatic {
1767 private:
1768 static int _payload_offset;
1769 public:
1770 static void set_payload(oop o, oop val);
1771
1772 static void compute_offsets();
1773 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1774
1775 // Testers
1776 static bool is_subclass(Klass* klass) {
1777 return klass->is_subclass_of(vmClasses::vector_VectorPayload_klass());
1778 }
1779 static bool is_instance(oop obj);
1780 };
1781
1782 class java_lang_Integer : AllStatic {
1783 public:
1784 static jint value(oop obj);
1785 };
1786
1787 class java_lang_Long : AllStatic {
1788 public:
1789 static jlong value(oop obj);
1790 };
1791
1792 class java_lang_Character : AllStatic {
1793 public:
1794 static jchar value(oop obj);
1795 };
1796
1797 class java_lang_Short : AllStatic {
1798 public:
1799 static jshort value(oop obj);
1800 };
1801
1802 class java_lang_Byte : AllStatic {
1803 public:
1804 static jbyte value(oop obj);
1805 };
1806
1807 class java_lang_Boolean : AllStatic {
1808 private:
1809 static int _static_TRUE_offset;
1810 static int _static_FALSE_offset;
1811 public:
1812 static Symbol* symbol();
1813 static void compute_offsets(InstanceKlass* k);
1814 static oop get_TRUE(InstanceKlass *k);
1815 static oop get_FALSE(InstanceKlass *k);
1816 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1817 static jboolean value(oop obj);
1818 };
1819
1820 class java_lang_Integer_IntegerCache : AllStatic {
1821 private:
1822 static int _static_cache_offset;
1823 public:
1824 static Symbol* symbol();
1825 static void compute_offsets(InstanceKlass* k);
1826 static objArrayOop cache(InstanceKlass *k);
1827 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1828 };
1829
1830 class java_lang_Long_LongCache : AllStatic {
1831 private:
1832 static int _static_cache_offset;
1833 public:
1834 static Symbol* symbol();
1835 static void compute_offsets(InstanceKlass* k);
1836 static objArrayOop cache(InstanceKlass *k);
1837 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1838 };
1839
1840 class java_lang_Character_CharacterCache : AllStatic {
1841 private:
1842 static int _static_cache_offset;
1843 public:
1844 static Symbol* symbol();
1845 static void compute_offsets(InstanceKlass* k);
1846 static objArrayOop cache(InstanceKlass *k);
1847 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1848 };
1849
1850 class java_lang_Short_ShortCache : AllStatic {
1851 private:
1852 static int _static_cache_offset;
1853 public:
1854 static Symbol* symbol();
1855 static void compute_offsets(InstanceKlass* k);
1856 static objArrayOop cache(InstanceKlass *k);
1857 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1858 };
1859
1860 class java_lang_Byte_ByteCache : AllStatic {
1861 private:
1862 static int _static_cache_offset;
1863 public:
1864 static Symbol* symbol();
1865 static void compute_offsets(InstanceKlass* k);
1866 static objArrayOop cache(InstanceKlass *k);
1867 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1868 };
1869
1870 // Interface to java.lang.InternalError objects
1871
1872 #define INTERNALERROR_INJECTED_FIELDS(macro) \
1873 macro(java_lang_InternalError, during_unsafe_access, bool_signature, false)
1874
1875 class java_lang_InternalError : AllStatic {
1876 private:
1877 static int _during_unsafe_access_offset;
1878 public:
1879 static jboolean during_unsafe_access(oop internal_error);
1880 static void set_during_unsafe_access(oop internal_error);
1881 static void compute_offsets();
1882 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1883 };
1884
1885 // Use to declare fields that need to be injected into Java classes
1886 // for the JVM to use. The name_index and signature_index are
1887 // declared in vmSymbols. The may_be_java flag is used to declare
1888 // fields that might already exist in Java but should be injected if
1889 // they don't. Otherwise the field is unconditionally injected and
1890 // the JVM uses the injected one. This is to ensure that name
1891 // collisions don't occur. In general may_be_java should be false
1892 // unless there's a good reason.
1893
1894 class InjectedField {
1895 public:
1896 const vmClassID klass_id;
1897 const vmSymbolID name_index;
1898 const vmSymbolID signature_index;
1899 const bool may_be_java;
1900
1901
1902 InstanceKlass* klass() const { return vmClasses::klass_at(klass_id); }
1903 Symbol* name() const { return lookup_symbol(name_index); }
1904 Symbol* signature() const { return lookup_symbol(signature_index); }
1905
1906 int compute_offset();
1907
1908 // Find the Symbol for this index
1909 static Symbol* lookup_symbol(vmSymbolID symbol_index) {
1910 return Symbol::vm_symbol_at(symbol_index);
1911 }
1912 };
1913
1914
1915 // Interface to hard-coded offset checking
1916
1917 enum class InjectedFieldID : int;
1918
1919 class JavaClasses : AllStatic {
1920 private:
1921
1922 static InjectedField _injected_fields[];
1923
1924 static bool check_offset(const char *klass_name, int offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1925 public:
1926
1927 static int compute_injected_offset(InjectedFieldID id);
1928
1929 static void compute_offsets();
1930 static void check_offsets() PRODUCT_RETURN;
1931 static void serialize_offsets(SerializeClosure* soc) NOT_CDS_RETURN;
1932 static InjectedField* get_injected(Symbol* class_name, int* field_count);
1933 static bool is_supported_for_archiving(oop obj) NOT_CDS_JAVA_HEAP_RETURN_(false);
1934
1935 static void compute_offset(int &dest_offset,
1936 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol,
1937 bool is_static = false);
1938 static void compute_offset(int& dest_offset, InstanceKlass* ik,
1939 const char* name_string, Symbol* signature_symbol,
1940 bool is_static = false);
1941 };
1942
1943 #undef CHECK_INIT
1944
1945 #endif // SHARE_CLASSFILE_JAVACLASSES_HPP