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