1 /*
2 * Copyright (c) 1997, 2025, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #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
217 // Debugging
218 static void print(oop java_string, outputStream* st, int max_length = MaxStringPrintSize);
219 friend class JavaClasses;
220 friend class StringTable;
221 };
222
223
224 // Interface to java.lang.Class objects
225
226 #define CLASS_INJECTED_FIELDS(macro) \
227 macro(java_lang_Class, klass, intptr_signature, false) \
228 macro(java_lang_Class, array_klass, intptr_signature, false) \
229 macro(java_lang_Class, oop_size, int_signature, false) \
230 macro(java_lang_Class, static_oop_field_count, int_signature, false) \
231 macro(java_lang_Class, source_file, object_signature, false) \
232 macro(java_lang_Class, init_lock, object_signature, false)
233
234 class java_lang_Class : AllStatic {
235 friend class VMStructs;
236 friend class JVMCIVMStructs;
237
238 private:
239
240 // The fake offsets are added by the class loader when java.lang.Class is loaded
241
242 static int _klass_offset;
243 static int _array_klass_offset;
244
245 static int _oop_size_offset;
246 static int _static_oop_field_count_offset;
247
248 static int _protection_domain_offset;
249 static int _init_lock_offset;
250 static int _signers_offset;
251 static int _class_loader_offset;
252 static int _module_offset;
253 static int _component_mirror_offset;
254 static int _name_offset;
255 static int _source_file_offset;
256 static int _classData_offset;
257 static int _classRedefinedCount_offset;
258 static int _reflectionData_offset;
259 static int _modifiers_offset;
260 static int _is_primitive_offset;
261
262 static bool _offsets_computed;
263
264 static GrowableArray<Klass*>* _fixup_mirror_list;
265 static GrowableArray<Klass*>* _fixup_module_field_list;
266
267 static void set_init_lock(oop java_class, oop init_lock);
268 static void set_protection_domain(oop java_class, oop protection_domain);
269 static void set_class_loader(oop java_class, oop class_loader);
270 static void set_component_mirror(oop java_class, oop comp_mirror);
271 static void initialize_mirror_fields(Klass* k, Handle mirror, Handle protection_domain,
272 Handle classData, TRAPS);
273 static void set_mirror_module_field(JavaThread* current, Klass* K, Handle mirror, Handle module);
274 public:
275 static void allocate_fixup_lists();
276 static void compute_offsets();
277
278 // Instance creation
279 static void allocate_mirror(Klass* k, bool is_scratch, Handle protection_domain, Handle classData,
280 Handle& mirror, Handle& comp_mirror, TRAPS); // returns mirror and comp_mirror
281 static void create_mirror(Klass* k, Handle class_loader, Handle module,
282 Handle protection_domain, Handle classData, TRAPS);
283 static void fixup_mirror(Klass* k, TRAPS);
284 static oop create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS);
285
286 // Archiving
287 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
288 static void create_scratch_mirror(Klass* k, TRAPS) NOT_CDS_JAVA_HEAP_RETURN;
289 static bool restore_archived_mirror(Klass *k, Handle class_loader, Handle module,
290 Handle protection_domain,
291 TRAPS) NOT_CDS_JAVA_HEAP_RETURN_(false);
292
293 static void fixup_module_field(Klass* k, Handle module);
294
295 // Conversion
296 static Klass* as_Klass(oop java_class);
297 static void set_klass(oop java_class, Klass* klass);
298 static BasicType as_BasicType(oop java_class, Klass** reference_klass = nullptr);
299 static Symbol* as_signature(oop java_class, bool intern_if_not_found);
300 static void print_signature(oop java_class, outputStream *st);
301 static const char* as_external_name(oop java_class);
302 // Testing
303 static bool is_instance(oop obj);
304
305 static bool is_primitive(oop java_class);
306 static void set_is_primitive(oop java_class);
307 static BasicType primitive_type(oop java_class);
308 static oop primitive_mirror(BasicType t);
309 // JVM_NewArray support
310 static Klass* array_klass_acquire(oop java_class);
311 static void release_set_array_klass(oop java_class, Klass* klass);
312 // compiler support for class operations
313 static int klass_offset() { CHECK_INIT(_klass_offset); }
314 static int array_klass_offset() { CHECK_INIT(_array_klass_offset); }
315 // Support for classRedefinedCount field
316 static int classRedefinedCount(oop the_class_mirror);
317 static void set_classRedefinedCount(oop the_class_mirror, int value);
318
319 // Support for embedded per-class oops
320 static oop protection_domain(oop java_class);
321 static oop init_lock(oop java_class);
322 static void clear_init_lock(oop java_class) {
323 set_init_lock(java_class, nullptr);
324 }
325 static oop component_mirror(oop java_class);
326 static int component_mirror_offset() { return _component_mirror_offset; }
327 static objArrayOop signers(oop java_class);
328 static oop class_data(oop java_class);
329 static void set_class_data(oop java_class, oop classData);
330 static void set_reflection_data(oop java_class, oop reflection_data);
331 static int reflection_data_offset() { return _reflectionData_offset; }
332
333 static oop class_loader(oop java_class);
334 static void set_module(oop java_class, oop module);
335 static oop module(oop java_class);
336
337 static oop name(Handle java_class, TRAPS);
338
339 static oop source_file(oop java_class);
340 static void set_source_file(oop java_class, oop source_file);
341
342 static int modifiers(oop java_class);
343 static void set_modifiers(oop java_class, u2 value);
344
345 static size_t oop_size(oop java_class);
346 static void set_oop_size(HeapWord* java_class, size_t size);
347 static int static_oop_field_count(oop java_class);
348 static void set_static_oop_field_count(oop java_class, int size);
349
350 static GrowableArray<Klass*>* fixup_mirror_list() {
351 return _fixup_mirror_list;
352 }
353 static void set_fixup_mirror_list(GrowableArray<Klass*>* v) {
354 _fixup_mirror_list = v;
355 }
356
357 static GrowableArray<Klass*>* fixup_module_field_list() {
358 return _fixup_module_field_list;
359 }
360 static void set_fixup_module_field_list(GrowableArray<Klass*>* v) {
361 _fixup_module_field_list = v;
362 }
363
364 // Debugging
365 friend class JavaClasses;
366 };
367
368 // Interface to java.lang.Thread objects
369
370 #define THREAD_INJECTED_FIELDS(macro) \
371 macro(java_lang_Thread, jvmti_thread_state, intptr_signature, false) \
372 macro(java_lang_Thread, jvmti_VTMS_transition_disable_count, int_signature, false) \
373 macro(java_lang_Thread, jvmti_is_in_VTMS_transition, bool_signature, false) \
374 JFR_ONLY(macro(java_lang_Thread, jfr_epoch, short_signature, false))
375
376 class java_lang_Thread : AllStatic {
377 friend class java_lang_VirtualThread;
378 friend class JVMCIVMStructs;
379 private:
380 // Note that for this class the layout changed between JDK1.2 and JDK1.3,
381 // so we compute the offsets at startup rather than hard-wiring them.
382 static int _holder_offset;
383 static int _name_offset;
384 static int _contextClassLoader_offset;
385 static int _eetop_offset;
386 static int _jvmti_thread_state_offset;
387 static int _jvmti_VTMS_transition_disable_count_offset;
388 static int _jvmti_is_in_VTMS_transition_offset;
389 static int _interrupted_offset;
390 static int _interruptLock_offset;
391 static int _tid_offset;
392 static int _continuation_offset;
393 static int _park_blocker_offset;
394 static int _scopedValueBindings_offset;
395 JFR_ONLY(static int _jfr_epoch_offset;)
396
397 static void compute_offsets();
398
399 public:
400 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
401
402 // Returns the JavaThread associated with the thread obj
403 static JavaThread* thread(oop java_thread);
404 static JavaThread* thread_acquire(oop java_thread);
405 // Set JavaThread for instance
406 static void set_thread(oop java_thread, JavaThread* thread);
407 static void release_set_thread(oop java_thread, JavaThread* thread);
408 // FieldHolder
409 static oop holder(oop java_thread);
410 // interruptLock
411 static oop interrupt_lock(oop java_thread);
412 // Interrupted status
413 static bool interrupted(oop java_thread);
414 static void set_interrupted(oop java_thread, bool val);
415 // Name
416 static oop name(oop java_thread);
417 static void set_name(oop java_thread, oop name);
418 // Priority
419 static ThreadPriority priority(oop java_thread);
420 static void set_priority(oop java_thread, ThreadPriority priority);
421 // Thread group
422 static oop threadGroup(oop java_thread);
423 // Alive (NOTE: this is not really a field, but provides the correct
424 // definition without doing a Java call)
425 static bool is_alive(oop java_thread);
426 // Daemon
427 static bool is_daemon(oop java_thread);
428 static void set_daemon(oop java_thread);
429 // Context ClassLoader
430 static oop context_class_loader(oop java_thread);
431 // Stack size hint
432 static jlong stackSize(oop java_thread);
433 // Thread ID
434 static int64_t thread_id(oop java_thread);
435 static ByteSize thread_id_offset();
436 // Continuation
437 static inline oop continuation(oop java_thread);
438
439 static JvmtiThreadState* jvmti_thread_state(oop java_thread);
440 static void set_jvmti_thread_state(oop java_thread, JvmtiThreadState* state);
441 static int VTMS_transition_disable_count(oop java_thread);
442 static void inc_VTMS_transition_disable_count(oop java_thread);
443 static void dec_VTMS_transition_disable_count(oop java_thread);
444 static bool is_in_VTMS_transition(oop java_thread);
445 static void set_is_in_VTMS_transition(oop java_thread, bool val);
446 static int is_in_VTMS_transition_offset();
447
448 // Clear all scoped value bindings on error
449 static void clear_scopedValueBindings(oop java_thread);
450
451 // Blocker object responsible for thread parking
452 static oop park_blocker(oop java_thread);
453
454 // Write thread status info to threadStatus field of java.lang.Thread.
455 static void set_thread_status(oop java_thread_oop, JavaThreadStatus status);
456 // Read thread status info from threadStatus field of java.lang.Thread.
457 static JavaThreadStatus get_thread_status(oop java_thread_oop);
458
459 static const char* thread_status_name(oop java_thread_oop);
460
461 // Fill in current stack trace, can cause GC
462 static oop async_get_stack_trace(oop java_thread, TRAPS);
463
464 JFR_ONLY(static u2 jfr_epoch(oop java_thread);)
465 JFR_ONLY(static void set_jfr_epoch(oop java_thread, u2 epoch);)
466 JFR_ONLY(static int jfr_epoch_offset() { CHECK_INIT(_jfr_epoch_offset); })
467
468 // Debugging
469 friend class JavaClasses;
470 };
471
472 // Interface to java.lang.Thread$FieldHolder objects
473
474 class java_lang_Thread_FieldHolder : AllStatic {
475 private:
476 static int _group_offset;
477 static int _priority_offset;
478 static int _stackSize_offset;
479 static int _daemon_offset;
480 static int _thread_status_offset;
481
482 static void compute_offsets();
483
484 public:
485 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
486
487 static oop threadGroup(oop holder);
488
489 static ThreadPriority priority(oop holder);
490 static void set_priority(oop holder, ThreadPriority priority);
491
492 static jlong stackSize(oop holder);
493
494 static bool is_daemon(oop holder);
495 static void set_daemon(oop holder, bool val);
496
497 static void set_thread_status(oop holder, JavaThreadStatus status);
498 static JavaThreadStatus get_thread_status(oop holder);
499
500 friend class JavaClasses;
501 };
502
503 // Interface to java.lang.Thread$Constants objects
504
505 class java_lang_Thread_Constants : AllStatic {
506 private:
507 static int _static_VTHREAD_GROUP_offset;
508 static int _static_NOT_SUPPORTED_CLASSLOADER_offset;
509
510 static void compute_offsets();
511 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
512
513 public:
514 static oop get_VTHREAD_GROUP();
515
516 friend class JavaClasses;
517 };
518
519 // Interface to java.lang.ThreadGroup objects
520
521 class java_lang_ThreadGroup : AllStatic {
522 private:
523 static int _parent_offset;
524 static int _name_offset;
525 static int _maxPriority_offset;
526 static int _daemon_offset;
527
528 static void compute_offsets();
529 public:
530 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
531
532 // parent ThreadGroup
533 static oop parent(oop java_thread_group);
534 // name
535 static const char* name(oop java_thread_group);
536 // maxPriority in group
537 static ThreadPriority maxPriority(oop java_thread_group);
538 // Daemon
539 static bool is_daemon(oop java_thread_group);
540
541 // Debugging
542 friend class JavaClasses;
543 };
544
545
546 // Interface to java.lang.VirtualThread objects
547 #define VTHREAD_INJECTED_FIELDS(macro) \
548 macro(java_lang_VirtualThread, objectWaiter, intptr_signature, false)
549
550 class java_lang_VirtualThread : AllStatic {
551 private:
552 static int static_vthread_scope_offset;
553 static int _carrierThread_offset;
554 static int _continuation_offset;
555 static int _state_offset;
556 static int _next_offset;
557 static int _onWaitingList_offset;
558 static int _notified_offset;
559 static int _recheckInterval_offset;
560 static int _timeout_offset;
561 static int _objectWaiter_offset;
562 JFR_ONLY(static int _jfr_epoch_offset;)
563 public:
564 enum {
565 NEW = 0,
566 STARTED = 1,
567 RUNNING = 2,
568 PARKING = 3,
569 PARKED = 4,
570 PINNED = 5,
571 TIMED_PARKING = 6,
572 TIMED_PARKED = 7,
573 TIMED_PINNED = 8,
574 UNPARKED = 9,
575 YIELDING = 10,
576 YIELDED = 11,
577 BLOCKING = 12,
578 BLOCKED = 13,
579 UNBLOCKED = 14,
580 WAITING = 15,
581 WAIT = 16, // waiting in Object.wait
582 TIMED_WAITING = 17,
583 TIMED_WAIT = 18, // waiting in timed-Object.wait
584 TERMINATED = 99,
585
586 // additional state bits
587 SUSPENDED = 1 << 8, // suspended when unmounted
588 };
589
590 static void compute_offsets();
591 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
592
593 // Testers
594 static bool is_subclass(Klass* klass) {
595 return klass->is_subclass_of(vmClasses::VirtualThread_klass());
596 }
597 static bool is_instance(oop obj);
598
599 static oop vthread_scope();
600 static oop carrier_thread(oop vthread);
601 static oop continuation(oop vthread);
602 static int state(oop vthread);
603 static void set_state(oop vthread, int state);
604 static int cmpxchg_state(oop vthread, int old_state, int new_state);
605 static oop next(oop vthread);
606 static void set_next(oop vthread, oop next_vthread);
607 static bool set_onWaitingList(oop vthread, OopHandle& list_head);
608 static jlong timeout(oop vthread);
609 static void set_timeout(oop vthread, jlong value);
610 static void set_notified(oop vthread, jboolean value);
611 static bool is_preempted(oop vthread);
612 static JavaThreadStatus map_state_to_thread_status(int state);
613
614 static inline ObjectWaiter* objectWaiter(oop vthread);
615 static inline void set_objectWaiter(oop vthread, ObjectWaiter* waiter);
616 static ObjectMonitor* current_pending_monitor(oop vthread);
617 static ObjectMonitor* current_waiting_monitor(oop vthread);
618 };
619
620
621 // Interface to java.lang.Throwable objects
622
623 class java_lang_Throwable: AllStatic {
624 friend class BacktraceBuilder;
625 friend class BacktraceIterator;
626
627 private:
628 // Trace constants
629 enum {
630 trace_methods_offset = 0,
631 trace_bcis_offset = 1,
632 trace_mirrors_offset = 2,
633 trace_names_offset = 3,
634 trace_conts_offset = 4,
635 trace_next_offset = 5,
636 trace_hidden_offset = 6,
637 trace_size = 7,
638 trace_chunk_size = 32
639 };
640
641 static int _backtrace_offset;
642 static int _detailMessage_offset;
643 static int _stackTrace_offset;
644 static int _depth_offset;
645 static int _cause_offset;
646 static int _static_unassigned_stacktrace_offset;
647
648 // StackTrace (programmatic access, new since 1.4)
649 static void clear_stacktrace(oop throwable);
650 // Stacktrace (post JDK 1.7.0 to allow immutability protocol to be followed)
651 static void set_stacktrace(oop throwable, oop st_element_array);
652 static oop unassigned_stacktrace();
653
654 public:
655 // Backtrace
656 static oop backtrace(oop throwable);
657 static void set_backtrace(oop throwable, oop value);
658 static int depth(oop throwable);
659 static void set_depth(oop throwable, int value);
660 // Message
661 static int get_detailMessage_offset() { CHECK_INIT(_detailMessage_offset); }
662 static oop message(oop throwable);
663 static const char* message_as_utf8(oop throwable);
664 static void set_message(oop throwable, oop value);
665
666 static oop cause(oop throwable);
667
668 static void print_stack_element(outputStream *st, Method* method, int bci);
669
670 static void compute_offsets();
671 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
672
673 // Allocate space for backtrace (created but stack trace not filled in)
674 static void allocate_backtrace(Handle throwable, TRAPS);
675 // Fill in current stack trace for throwable with preallocated backtrace (no GC)
676 static void fill_in_stack_trace_of_preallocated_backtrace(Handle throwable);
677 // Fill in current stack trace, can cause GC
678 static void fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS);
679 static void fill_in_stack_trace(Handle throwable, const methodHandle& method = methodHandle());
680
681 // Programmatic access to stack trace
682 static void get_stack_trace_elements(int depth, Handle backtrace, objArrayHandle stack_trace, TRAPS);
683
684 // For recreating class initialization error exceptions.
685 static Handle create_initialization_error(JavaThread* current, Handle throwable);
686
687 // Printing
688 static void print(oop throwable, outputStream* st);
689 static void print_stack_trace(Handle throwable, outputStream* st);
690 static void java_printStackTrace(Handle throwable, TRAPS);
691 // Debugging
692 friend class JavaClasses;
693 // Gets the method and bci of the top frame (TOS). Returns false if this failed.
694 static bool get_top_method_and_bci(oop throwable, Method** method, int* bci);
695 };
696
697
698 // Interface to java.lang.reflect.AccessibleObject objects
699
700 class java_lang_reflect_AccessibleObject: AllStatic {
701 private:
702 // Note that to reduce dependencies on the JDK we compute these
703 // offsets at run-time.
704 static int _override_offset;
705
706 static void compute_offsets();
707
708 public:
709 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
710
711 // Accessors
712 static jboolean override(oop reflect);
713 static void set_override(oop reflect, jboolean value);
714
715 // Debugging
716 friend class JavaClasses;
717 };
718
719
720 // Interface to java.lang.reflect.Method objects
721
722 class java_lang_reflect_Method : public java_lang_reflect_AccessibleObject {
723 private:
724 // Note that to reduce dependencies on the JDK we compute these
725 // offsets at run-time.
726 static int _clazz_offset;
727 static int _name_offset;
728 static int _returnType_offset;
729 static int _parameterTypes_offset;
730 static int _exceptionTypes_offset;
731 static int _slot_offset;
732 static int _modifiers_offset;
733 static int _signature_offset;
734 static int _annotations_offset;
735 static int _parameter_annotations_offset;
736 static int _annotation_default_offset;
737
738 static void compute_offsets();
739 public:
740 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
741
742 // Allocation
743 static Handle create(TRAPS);
744
745 // Accessors
746 static oop clazz(oop reflect);
747 static void set_clazz(oop reflect, oop value);
748
749 static void set_name(oop method, oop value);
750
751 static oop return_type(oop method);
752 static void set_return_type(oop method, oop value);
753
754 static oop parameter_types(oop method);
755 static void set_parameter_types(oop method, oop value);
756
757 static int slot(oop reflect);
758 static void set_slot(oop reflect, int value);
759
760 static void set_exception_types(oop method, oop value);
761 static void set_modifiers(oop method, int value);
762 static void set_signature(oop method, oop value);
763 static void set_annotations(oop method, oop value);
764 static void set_parameter_annotations(oop method, oop value);
765 static void set_annotation_default(oop method, oop value);
766
767 // Debugging
768 friend class JavaClasses;
769 };
770
771
772 // Interface to java.lang.reflect.Constructor objects
773
774 class java_lang_reflect_Constructor : public java_lang_reflect_AccessibleObject {
775 private:
776 // Note that to reduce dependencies on the JDK we compute these
777 // offsets at run-time.
778 static int _clazz_offset;
779 static int _parameterTypes_offset;
780 static int _exceptionTypes_offset;
781 static int _slot_offset;
782 static int _modifiers_offset;
783 static int _signature_offset;
784 static int _annotations_offset;
785 static int _parameter_annotations_offset;
786
787 static void compute_offsets();
788 public:
789 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
790
791 // Allocation
792 static Handle create(TRAPS);
793
794 // Accessors
795 static oop clazz(oop reflect);
796 static void set_clazz(oop reflect, oop value);
797
798 static oop parameter_types(oop constructor);
799 static void set_parameter_types(oop constructor, oop value);
800
801 static int slot(oop reflect);
802 static void set_slot(oop reflect, int value);
803
804 static void set_exception_types(oop constructor, oop value);
805 static void set_modifiers(oop constructor, int value);
806 static void set_signature(oop constructor, oop value);
807 static void set_annotations(oop constructor, oop value);
808 static void set_parameter_annotations(oop method, oop value);
809
810 // Debugging
811 friend class JavaClasses;
812 };
813
814
815 // Interface to java.lang.reflect.Field objects
816
817 class java_lang_reflect_Field : public java_lang_reflect_AccessibleObject {
818 private:
819 // Note that to reduce dependencies on the JDK we compute these
820 // offsets at run-time.
821 static int _clazz_offset;
822 static int _name_offset;
823 static int _type_offset;
824 static int _slot_offset;
825 static int _modifiers_offset;
826 static int _trusted_final_offset;
827 static int _signature_offset;
828 static int _annotations_offset;
829
830 static void compute_offsets();
831
832 public:
833 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
834
835 // Allocation
836 static Handle create(TRAPS);
837
838 // Accessors
839 static oop clazz(oop reflect);
840 static void set_clazz(oop reflect, oop value);
841
842 static oop name(oop field);
843 static void set_name(oop field, oop value);
844
845 static oop type(oop field);
846 static void set_type(oop field, oop value);
847
848 static int slot(oop reflect);
849 static void set_slot(oop reflect, int value);
850
851 static int modifiers(oop field);
852 static void set_modifiers(oop field, int value);
853
854 static void set_trusted_final(oop field);
855
856 static void set_signature(oop constructor, oop value);
857 static void set_annotations(oop constructor, oop value);
858
859 // Debugging
860 friend class JavaClasses;
861 };
862
863 class java_lang_reflect_Parameter {
864 private:
865 // Note that to reduce dependencies on the JDK we compute these
866 // offsets at run-time.
867 static int _name_offset;
868 static int _modifiers_offset;
869 static int _index_offset;
870 static int _executable_offset;
871
872 static void compute_offsets();
873
874 public:
875 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
876
877 // Allocation
878 static Handle create(TRAPS);
879
880 // Accessors
881 static oop name(oop field);
882 static void set_name(oop field, oop value);
883
884 static int index(oop reflect);
885 static void set_index(oop reflect, int value);
886
887 static int modifiers(oop reflect);
888 static void set_modifiers(oop reflect, int value);
889
890 static oop executable(oop constructor);
891 static void set_executable(oop constructor, oop value);
892
893 friend class JavaClasses;
894 };
895
896 #define MODULE_INJECTED_FIELDS(macro) \
897 macro(java_lang_Module, module_entry, intptr_signature, false)
898
899 class java_lang_Module {
900 private:
901 static int _loader_offset;
902 static int _name_offset;
903 static int _module_entry_offset;
904
905 static void compute_offsets();
906
907 public:
908 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
909
910 // Allocation
911 static Handle create(Handle loader, Handle module_name, TRAPS);
912
913 // Testers
914 static bool is_instance(oop obj);
915
916 // Accessors
917 static oop loader(oop module);
918 static void set_loader(oop module, oop value);
919
920 // CDS
921 static int module_entry_offset() { return _module_entry_offset; }
922
923 static oop name(oop module);
924 static void set_name(oop module, oop value);
925
926 static ModuleEntry* module_entry(oop module);
927 static ModuleEntry* module_entry_raw(oop module);
928 static void set_module_entry(oop module, ModuleEntry* module_entry);
929
930 friend class JavaClasses;
931 };
932
933 // Interface to jdk.internal.reflect.ConstantPool objects
934 class reflect_ConstantPool {
935 private:
936 // Note that to reduce dependencies on the JDK we compute these
937 // offsets at run-time.
938 static int _oop_offset;
939
940 static void compute_offsets();
941
942 public:
943 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
944
945 // Allocation
946 static Handle create(TRAPS);
947
948 // Accessors
949 static void set_cp(oop reflect, ConstantPool* value);
950 static int oop_offset() { CHECK_INIT(_oop_offset); }
951
952 static ConstantPool* get_cp(oop reflect);
953
954 // Debugging
955 friend class JavaClasses;
956 };
957
958
959 // Interface to java.lang primitive type boxing objects:
960 // - java.lang.Boolean
961 // - java.lang.Character
962 // - java.lang.Float
963 // - java.lang.Double
964 // - java.lang.Byte
965 // - java.lang.Short
966 // - java.lang.Integer
967 // - java.lang.Long
968
969 // This could be separated out into 8 individual classes.
970
971 class java_lang_boxing_object: AllStatic {
972 private:
973 static int _value_offset;
974 static int _long_value_offset;
975
976 static void compute_offsets();
977 static oop initialize_and_allocate(BasicType type, TRAPS);
978 public:
979 // Allocation. Returns a boxed value, or null for invalid type.
980 static oop create(BasicType type, jvalue* value, TRAPS);
981 // Accessors. Returns the basic type being boxed, or T_ILLEGAL for invalid oop.
982 static BasicType get_value(oop box, jvalue* value);
983 static BasicType set_value(oop box, jvalue* value);
984 static BasicType basic_type(oop box);
985 static bool is_instance(oop box) { return basic_type(box) != T_ILLEGAL; }
986 static bool is_instance(oop box, BasicType type) { return basic_type(box) == type; }
987 static void print(oop box, outputStream* st) { jvalue value; print(get_value(box, &value), &value, st); }
988 static void print(BasicType type, jvalue* value, outputStream* st);
989
990 static int value_offset(BasicType type) {
991 return is_double_word_type(type) ? _long_value_offset : _value_offset;
992 }
993
994 static void serialize_offsets(SerializeClosure* f);
995
996 // Debugging
997 friend class JavaClasses;
998 };
999
1000
1001
1002 // Interface to java.lang.ref.Reference objects
1003
1004 class java_lang_ref_Reference: AllStatic {
1005 static int _referent_offset;
1006 static int _queue_offset;
1007 static int _next_offset;
1008 static int _discovered_offset;
1009
1010 static bool _offsets_initialized;
1011
1012 public:
1013 // Accessors
1014 static inline oop weak_referent_no_keepalive(oop ref);
1015 static inline oop weak_referent(oop ref);
1016 static inline oop phantom_referent_no_keepalive(oop ref);
1017 static inline oop unknown_referent_no_keepalive(oop ref);
1018 static inline void clear_referent(oop ref);
1019 static inline void clear_referent_raw(oop ref);
1020 static inline HeapWord* referent_addr_raw(oop ref);
1021 static inline oop next(oop ref);
1022 static inline void set_next(oop ref, oop value);
1023 static inline void set_next_raw(oop ref, oop value);
1024 static inline HeapWord* next_addr_raw(oop ref);
1025 static inline oop discovered(oop ref);
1026 static inline void set_discovered(oop ref, oop value);
1027 static inline void set_discovered_raw(oop ref, oop value);
1028 static inline HeapWord* discovered_addr_raw(oop ref);
1029 static bool is_referent_field(oop obj, ptrdiff_t offset);
1030 static inline bool is_final(oop ref);
1031 static inline bool is_phantom(oop ref);
1032 static inline bool is_weak(oop ref);
1033 static inline bool is_soft(oop ref);
1034
1035 static int referent_offset() { CHECK_INIT(_referent_offset); }
1036 static int queue_offset() { CHECK_INIT(_queue_offset); }
1037 static int next_offset() { CHECK_INIT(_next_offset); }
1038 static int discovered_offset() { CHECK_INIT(_discovered_offset); }
1039
1040 static void compute_offsets();
1041 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1042 };
1043
1044
1045 // Interface to java.lang.ref.SoftReference objects
1046
1047 class java_lang_ref_SoftReference: public java_lang_ref_Reference {
1048 static int _timestamp_offset;
1049 static int _static_clock_offset;
1050
1051 public:
1052 // Accessors
1053 static jlong timestamp(oop ref);
1054
1055 // Accessors for statics
1056 static jlong clock();
1057 static void set_clock(jlong value);
1058
1059 static void compute_offsets();
1060 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1061 };
1062
1063 // Interface to java.lang.invoke.MethodHandle objects
1064
1065 class java_lang_invoke_MethodHandle: AllStatic {
1066 friend class JavaClasses;
1067
1068 private:
1069 static int _type_offset; // the MethodType of this MH
1070 static int _form_offset; // the LambdaForm of this MH
1071
1072 static void compute_offsets();
1073
1074 public:
1075 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1076
1077 // Accessors
1078 static oop type(oop mh);
1079 static void set_type(oop mh, oop mtype);
1080
1081 static oop form(oop mh);
1082 static void set_form(oop mh, oop lform);
1083
1084 // Testers
1085 static bool is_subclass(Klass* klass) {
1086 return klass->is_subclass_of(vmClasses::MethodHandle_klass());
1087 }
1088 static bool is_instance(oop obj);
1089
1090 // Accessors for code generation:
1091 static int type_offset() { CHECK_INIT(_type_offset); }
1092 static int form_offset() { CHECK_INIT(_form_offset); }
1093 };
1094
1095 // Interface to java.lang.invoke.DirectMethodHandle objects
1096
1097 class java_lang_invoke_DirectMethodHandle: AllStatic {
1098 friend class JavaClasses;
1099
1100 private:
1101 static int _member_offset; // the MemberName of this DMH
1102
1103 static void compute_offsets();
1104
1105 public:
1106 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1107
1108 // Accessors
1109 static oop member(oop mh);
1110
1111 // Testers
1112 static bool is_subclass(Klass* klass) {
1113 return klass->is_subclass_of(vmClasses::DirectMethodHandle_klass());
1114 }
1115 static bool is_instance(oop obj);
1116
1117 // Accessors for code generation:
1118 static int member_offset() { CHECK_INIT(_member_offset); }
1119 };
1120
1121 // Interface to java.lang.invoke.LambdaForm objects
1122 // (These are a private interface for managing adapter code generation.)
1123
1124 class java_lang_invoke_LambdaForm: AllStatic {
1125 friend class JavaClasses;
1126
1127 private:
1128 static int _vmentry_offset; // type is MemberName
1129
1130 static void compute_offsets();
1131
1132 public:
1133 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1134
1135 // Accessors
1136 static oop vmentry(oop lform);
1137
1138 // Testers
1139 static bool is_subclass(Klass* klass) {
1140 return vmClasses::LambdaForm_klass() != nullptr &&
1141 klass->is_subclass_of(vmClasses::LambdaForm_klass());
1142 }
1143 static bool is_instance(oop obj);
1144
1145 // Accessors for code generation:
1146 static int vmentry_offset() { CHECK_INIT(_vmentry_offset); }
1147 };
1148
1149 // Interface to java.lang.invoke.NativeEntryPoint objects
1150 // (These are a private interface for managing adapter code generation.)
1151
1152 class jdk_internal_foreign_abi_NativeEntryPoint: AllStatic {
1153 friend class JavaClasses;
1154
1155 private:
1156 static int _method_type_offset;
1157 static int _downcall_stub_address_offset;
1158
1159 static void compute_offsets();
1160
1161 public:
1162 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1163
1164 // Accessors
1165 static oop method_type(oop entry);
1166 static jlong downcall_stub_address(oop entry);
1167
1168 // Testers
1169 static bool is_subclass(Klass* klass) {
1170 return vmClasses::NativeEntryPoint_klass() != nullptr &&
1171 klass->is_subclass_of(vmClasses::NativeEntryPoint_klass());
1172 }
1173 static bool is_instance(oop obj);
1174
1175 // Accessors for code generation:
1176 static int method_type_offset_in_bytes() { return _method_type_offset; }
1177 static int downcall_stub_address_offset_in_bytes() { return _downcall_stub_address_offset; }
1178 };
1179
1180 class jdk_internal_foreign_abi_ABIDescriptor: AllStatic {
1181 friend class JavaClasses;
1182
1183 private:
1184 static int _inputStorage_offset;
1185 static int _outputStorage_offset;
1186 static int _volatileStorage_offset;
1187 static int _stackAlignment_offset;
1188 static int _shadowSpace_offset;
1189 static int _scratch1_offset;
1190 static int _scratch2_offset;
1191
1192 static void compute_offsets();
1193
1194 public:
1195 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1196
1197 // Accessors
1198 static objArrayOop inputStorage(oop entry);
1199 static objArrayOop outputStorage(oop entry);
1200 static objArrayOop volatileStorage(oop entry);
1201 static jint stackAlignment(oop entry);
1202 static jint shadowSpace(oop entry);
1203 static oop scratch1(oop entry);
1204 static oop scratch2(oop entry);
1205
1206 // Testers
1207 static bool is_subclass(Klass* klass) {
1208 return vmClasses::ABIDescriptor_klass() != nullptr &&
1209 klass->is_subclass_of(vmClasses::ABIDescriptor_klass());
1210 }
1211 static bool is_instance(oop obj);
1212 };
1213
1214 class jdk_internal_foreign_abi_VMStorage: AllStatic {
1215 friend class JavaClasses;
1216
1217 private:
1218 static int _type_offset;
1219 static int _indexOrOffset_offset;
1220 static int _segmentMaskOrSize_offset;
1221 static int _debugName_offset;
1222
1223 static void compute_offsets();
1224
1225 public:
1226 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1227
1228 // Accessors
1229 static jbyte type(oop entry);
1230 static jint index_or_offset(oop entry);
1231 static jshort segment_mask_or_size(oop entry);
1232 static oop debugName(oop entry);
1233
1234 // Testers
1235 static bool is_subclass(Klass* klass) {
1236 return vmClasses::VMStorage_klass() != nullptr &&
1237 klass->is_subclass_of(vmClasses::VMStorage_klass());
1238 }
1239 static bool is_instance(oop obj);
1240 };
1241
1242 class jdk_internal_foreign_abi_CallConv: AllStatic {
1243 friend class JavaClasses;
1244
1245 private:
1246 static int _argRegs_offset;
1247 static int _retRegs_offset;
1248
1249 static void compute_offsets();
1250
1251 public:
1252 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1253
1254 // Accessors
1255 static objArrayOop argRegs(oop entry);
1256 static objArrayOop retRegs(oop entry);
1257
1258 // Testers
1259 static bool is_subclass(Klass* klass) {
1260 return vmClasses::CallConv_klass() != nullptr &&
1261 klass->is_subclass_of(vmClasses::CallConv_klass());
1262 }
1263 static bool is_instance(oop obj);
1264 };
1265
1266 // Interface to java.lang.invoke.MemberName objects
1267 // (These are a private interface for Java code to query the class hierarchy.)
1268
1269 #define RESOLVEDMETHOD_INJECTED_FIELDS(macro) \
1270 macro(java_lang_invoke_ResolvedMethodName, vmtarget, intptr_signature, false)
1271
1272 class java_lang_invoke_ResolvedMethodName : AllStatic {
1273 friend class JavaClasses;
1274
1275 static int _vmtarget_offset;
1276 static int _vmholder_offset;
1277
1278 static void compute_offsets();
1279 public:
1280 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1281
1282 static int vmtarget_offset() { CHECK_INIT(_vmtarget_offset); }
1283
1284 static Method* vmtarget(oop resolved_method);
1285 static void set_vmtarget(oop resolved_method, Method* method);
1286
1287 static void set_vmholder(oop resolved_method, oop holder);
1288
1289 // find or create resolved member name
1290 static oop find_resolved_method(const methodHandle& m, TRAPS);
1291
1292 static bool is_instance(oop resolved_method);
1293 };
1294
1295
1296 #define MEMBERNAME_INJECTED_FIELDS(macro) \
1297 macro(java_lang_invoke_MemberName, vmindex, intptr_signature, false)
1298
1299
1300 class java_lang_invoke_MemberName: AllStatic {
1301 friend class JavaClasses;
1302
1303 private:
1304 // From java.lang.invoke.MemberName:
1305 // private Class<?> clazz; // class in which the method is defined
1306 // private String name; // may be null if not yet materialized
1307 // private Object type; // may be null if not yet materialized
1308 // private int flags; // modifier bits; see reflect.Modifier
1309 // private ResolvedMethodName method; // holds VM-specific target value
1310 // private intptr_t vmindex; // member index within class or interface
1311 static int _clazz_offset;
1312 static int _name_offset;
1313 static int _type_offset;
1314 static int _flags_offset;
1315 static int _method_offset;
1316 static int _vmindex_offset;
1317
1318 static void compute_offsets();
1319
1320 public:
1321 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1322 // Accessors
1323 static oop clazz(oop mname);
1324 static void set_clazz(oop mname, oop clazz);
1325
1326 static oop type(oop mname);
1327 static void set_type(oop mname, oop type);
1328
1329 static oop name(oop mname);
1330 static void set_name(oop mname, oop name);
1331
1332 static int flags(oop mname);
1333 static void set_flags(oop mname, int flags);
1334
1335 // Link through ResolvedMethodName field to get Method*
1336 static Method* vmtarget(oop mname);
1337 static void set_method(oop mname, oop method);
1338
1339 static intptr_t vmindex(oop mname);
1340 static void set_vmindex(oop mname, intptr_t index);
1341
1342 // Testers
1343 static bool is_subclass(Klass* klass) {
1344 return klass->is_subclass_of(vmClasses::MemberName_klass());
1345 }
1346 static bool is_instance(oop obj);
1347
1348 static bool is_method(oop obj);
1349
1350 // Relevant integer codes (keep these in synch. with MethodHandleNatives.Constants):
1351 enum {
1352 MN_IS_METHOD = 0x00010000, // method (not constructor)
1353 MN_IS_CONSTRUCTOR = 0x00020000, // constructor
1354 MN_IS_FIELD = 0x00040000, // field
1355 MN_IS_TYPE = 0x00080000, // nested type
1356 MN_CALLER_SENSITIVE = 0x00100000, // @CallerSensitive annotation detected
1357 MN_TRUSTED_FINAL = 0x00200000, // trusted final field
1358 MN_HIDDEN_MEMBER = 0x00400000, // @Hidden annotation detected
1359 MN_REFERENCE_KIND_SHIFT = 24, // refKind
1360 MN_REFERENCE_KIND_MASK = 0x0F000000 >> MN_REFERENCE_KIND_SHIFT,
1361 MN_NESTMATE_CLASS = 0x00000001,
1362 MN_HIDDEN_CLASS = 0x00000002,
1363 MN_STRONG_LOADER_LINK = 0x00000004,
1364 MN_ACCESS_VM_ANNOTATIONS = 0x00000008,
1365 // Lookup modes
1366 MN_MODULE_MODE = 0x00000010,
1367 MN_UNCONDITIONAL_MODE = 0x00000020,
1368 MN_TRUSTED_MODE = -1
1369 };
1370
1371 // Accessors for code generation:
1372 static int clazz_offset() { CHECK_INIT(_clazz_offset); }
1373 static int type_offset() { CHECK_INIT(_type_offset); }
1374 static int flags_offset() { CHECK_INIT(_flags_offset); }
1375 static int method_offset() { CHECK_INIT(_method_offset); }
1376 static int vmindex_offset() { CHECK_INIT(_vmindex_offset); }
1377 };
1378
1379
1380 // Interface to java.lang.invoke.MethodType objects
1381
1382 class java_lang_invoke_MethodType: AllStatic {
1383 friend class JavaClasses;
1384
1385 private:
1386 static int _rtype_offset;
1387 static int _ptypes_offset;
1388
1389 static void compute_offsets();
1390
1391 public:
1392 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1393 // Accessors
1394 static oop rtype(oop mt);
1395 static objArrayOop ptypes(oop mt);
1396
1397 static oop ptype(oop mt, int index);
1398 static int ptype_count(oop mt);
1399
1400 static int ptype_slot_count(oop mt); // extra counts for long/double
1401 static int rtype_slot_count(oop mt); // extra counts for long/double
1402
1403 static Symbol* as_signature(oop mt, bool intern_if_not_found);
1404 static void print_signature(oop mt, outputStream* st);
1405
1406 static bool is_instance(oop obj);
1407
1408 static bool equals(oop mt1, oop mt2);
1409
1410 // Accessors for code generation:
1411 static int rtype_offset() { CHECK_INIT(_rtype_offset); }
1412 static int ptypes_offset() { CHECK_INIT(_ptypes_offset); }
1413 };
1414
1415
1416 // Interface to java.lang.invoke.CallSite objects
1417 #define CALLSITE_INJECTED_FIELDS(macro) \
1418 macro(java_lang_invoke_CallSite, vmdependencies, intptr_signature, false) \
1419 macro(java_lang_invoke_CallSite, last_cleanup, long_signature, false)
1420
1421 class java_lang_invoke_CallSite: AllStatic {
1422 friend class JavaClasses;
1423
1424 private:
1425 static int _target_offset;
1426 static int _vmdependencies_offset;
1427 static int _last_cleanup_offset;
1428
1429 static void compute_offsets();
1430
1431 public:
1432 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1433 // Accessors
1434 static oop target( oop site);
1435 static void set_target( oop site, oop target);
1436 static void set_target_volatile( oop site, oop target);
1437
1438 static DependencyContext vmdependencies(oop call_site);
1439
1440 // Testers
1441 static bool is_subclass(Klass* klass) {
1442 return klass->is_subclass_of(vmClasses::CallSite_klass());
1443 }
1444 static bool is_instance(oop obj);
1445
1446 // Accessors for code generation:
1447 static int target_offset() { CHECK_INIT(_target_offset); }
1448 };
1449
1450 // Interface to java.lang.invoke.ConstantCallSite objects
1451
1452 class java_lang_invoke_ConstantCallSite: AllStatic {
1453 friend class JavaClasses;
1454
1455 private:
1456 static int _is_frozen_offset;
1457
1458 static void compute_offsets();
1459
1460 public:
1461 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1462 // Accessors
1463 static jboolean is_frozen(oop site);
1464
1465 // Testers
1466 static bool is_subclass(Klass* klass) {
1467 return klass->is_subclass_of(vmClasses::ConstantCallSite_klass());
1468 }
1469 static bool is_instance(oop obj);
1470 };
1471
1472 // Interface to java.lang.ClassLoader objects
1473
1474 #define CLASSLOADER_INJECTED_FIELDS(macro) \
1475 macro(java_lang_ClassLoader, loader_data, intptr_signature, false)
1476
1477 class java_lang_ClassLoader : AllStatic {
1478 private:
1479 static int _loader_data_offset;
1480 static int _parent_offset;
1481 static int _parallelCapable_offset;
1482 static int _name_offset;
1483 static int _nameAndId_offset;
1484 static int _unnamedModule_offset;
1485
1486 static void compute_offsets();
1487
1488 public:
1489 // Support for CDS
1490 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1491 static int loader_data_offset() { return _loader_data_offset; }
1492
1493 static ClassLoaderData* loader_data_acquire(oop loader);
1494 static ClassLoaderData* loader_data(oop loader);
1495 static void release_set_loader_data(oop loader, ClassLoaderData* new_data);
1496
1497 static oop parent(oop loader);
1498 static oop parent_no_keepalive(oop loader);
1499 static oop name(oop loader);
1500 static oop nameAndId(oop loader);
1501 static bool isAncestor(oop loader, oop cl);
1502
1503 // Support for parallelCapable field
1504 static bool parallelCapable(oop the_class_mirror);
1505
1506 static bool is_trusted_loader(oop loader);
1507
1508 // Testers
1509 static bool is_subclass(Klass* klass) {
1510 return klass->is_subclass_of(vmClasses::ClassLoader_klass());
1511 }
1512 static bool is_instance(oop obj);
1513
1514 static oop unnamedModule(oop loader);
1515
1516 // Debugging
1517 friend class JavaClasses;
1518 };
1519
1520
1521 // Interface to java.lang.System objects
1522
1523 class java_lang_System : AllStatic {
1524 private:
1525 static int _static_in_offset;
1526 static int _static_out_offset;
1527 static int _static_err_offset;
1528
1529 public:
1530 static int in_offset() { CHECK_INIT(_static_in_offset); }
1531 static int out_offset() { CHECK_INIT(_static_out_offset); }
1532 static int err_offset() { CHECK_INIT(_static_err_offset); }
1533
1534 static void compute_offsets();
1535 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1536
1537 // Debugging
1538 friend class JavaClasses;
1539 };
1540
1541
1542 // Interface to java.lang.StackTraceElement objects
1543
1544 class java_lang_StackTraceElement: AllStatic {
1545 private:
1546 static int _declaringClassObject_offset;
1547 static int _classLoaderName_offset;
1548 static int _moduleName_offset;
1549 static int _moduleVersion_offset;
1550 static int _declaringClass_offset;
1551 static int _methodName_offset;
1552 static int _fileName_offset;
1553 static int _lineNumber_offset;
1554
1555 // Setters
1556 static void set_classLoaderName(oop element, oop value);
1557 static void set_moduleName(oop element, oop value);
1558 static void set_moduleVersion(oop element, oop value);
1559 static void set_declaringClass(oop element, oop value);
1560 static void set_methodName(oop element, oop value);
1561 static void set_fileName(oop element, oop value);
1562 static void set_lineNumber(oop element, int value);
1563 static void set_declaringClassObject(oop element, oop value);
1564
1565 static void decode_file_and_line(Handle java_mirror, InstanceKlass* holder, int version,
1566 const methodHandle& method, int bci,
1567 Symbol*& source, oop& source_file, int& line_number, TRAPS);
1568
1569 public:
1570 // Create an instance of StackTraceElement
1571 static oop create(const methodHandle& method, int bci, TRAPS);
1572
1573 static void fill_in(Handle element, InstanceKlass* holder, const methodHandle& method,
1574 int version, int bci, Symbol* name, TRAPS);
1575
1576 static void compute_offsets();
1577 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1578
1579 #if INCLUDE_JVMCI
1580 static void decode(const methodHandle& method, int bci, Symbol*& fileName, int& lineNumber, TRAPS);
1581 #endif
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_Integer : AllStatic {
1777 public:
1778 static jint value(oop obj);
1779 };
1780
1781 class java_lang_Long : AllStatic {
1782 public:
1783 static jlong value(oop obj);
1784 };
1785
1786 class java_lang_Character : AllStatic {
1787 public:
1788 static jchar value(oop obj);
1789 };
1790
1791 class java_lang_Short : AllStatic {
1792 public:
1793 static jshort value(oop obj);
1794 };
1795
1796 class java_lang_Byte : AllStatic {
1797 public:
1798 static jbyte value(oop obj);
1799 };
1800
1801 class java_lang_Boolean : AllStatic {
1802 private:
1803 static int _static_TRUE_offset;
1804 static int _static_FALSE_offset;
1805 public:
1806 static Symbol* symbol();
1807 static void compute_offsets(InstanceKlass* k);
1808 static oop get_TRUE(InstanceKlass *k);
1809 static oop get_FALSE(InstanceKlass *k);
1810 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1811 static jboolean value(oop obj);
1812 };
1813
1814 class java_lang_Integer_IntegerCache : AllStatic {
1815 private:
1816 static int _static_cache_offset;
1817 public:
1818 static Symbol* symbol();
1819 static void compute_offsets(InstanceKlass* k);
1820 static objArrayOop cache(InstanceKlass *k);
1821 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1822 };
1823
1824 class java_lang_Long_LongCache : AllStatic {
1825 private:
1826 static int _static_cache_offset;
1827 public:
1828 static Symbol* symbol();
1829 static void compute_offsets(InstanceKlass* k);
1830 static objArrayOop cache(InstanceKlass *k);
1831 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1832 };
1833
1834 class java_lang_Character_CharacterCache : AllStatic {
1835 private:
1836 static int _static_cache_offset;
1837 public:
1838 static Symbol* symbol();
1839 static void compute_offsets(InstanceKlass* k);
1840 static objArrayOop cache(InstanceKlass *k);
1841 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1842 };
1843
1844 class java_lang_Short_ShortCache : AllStatic {
1845 private:
1846 static int _static_cache_offset;
1847 public:
1848 static Symbol* symbol();
1849 static void compute_offsets(InstanceKlass* k);
1850 static objArrayOop cache(InstanceKlass *k);
1851 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1852 };
1853
1854 class java_lang_Byte_ByteCache : AllStatic {
1855 private:
1856 static int _static_cache_offset;
1857 public:
1858 static Symbol* symbol();
1859 static void compute_offsets(InstanceKlass* k);
1860 static objArrayOop cache(InstanceKlass *k);
1861 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1862 };
1863
1864
1865 // Interface to java.lang.InternalError objects
1866
1867 #define INTERNALERROR_INJECTED_FIELDS(macro) \
1868 macro(java_lang_InternalError, during_unsafe_access, bool_signature, false)
1869
1870 class java_lang_InternalError : AllStatic {
1871 private:
1872 static int _during_unsafe_access_offset;
1873 public:
1874 static jboolean during_unsafe_access(oop internal_error);
1875 static void set_during_unsafe_access(oop internal_error);
1876 static void compute_offsets();
1877 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1878 };
1879
1880 // Use to declare fields that need to be injected into Java classes
1881 // for the JVM to use. The name_index and signature_index are
1882 // declared in vmSymbols. The may_be_java flag is used to declare
1883 // fields that might already exist in Java but should be injected if
1884 // they don't. Otherwise the field is unconditionally injected and
1885 // the JVM uses the injected one. This is to ensure that name
1886 // collisions don't occur. In general may_be_java should be false
1887 // unless there's a good reason.
1888
1889 class InjectedField {
1890 public:
1891 const vmClassID klass_id;
1892 const vmSymbolID name_index;
1893 const vmSymbolID signature_index;
1894 const bool may_be_java;
1895
1896
1897 Klass* klass() const { return vmClasses::klass_at(klass_id); }
1898 Symbol* name() const { return lookup_symbol(name_index); }
1899 Symbol* signature() const { return lookup_symbol(signature_index); }
1900
1901 int compute_offset();
1902
1903 // Find the Symbol for this index
1904 static Symbol* lookup_symbol(vmSymbolID symbol_index) {
1905 return Symbol::vm_symbol_at(symbol_index);
1906 }
1907 };
1908
1909
1910 // Interface to hard-coded offset checking
1911
1912 enum class InjectedFieldID : int;
1913
1914 class JavaClasses : AllStatic {
1915 private:
1916
1917 static InjectedField _injected_fields[];
1918
1919 static bool check_offset(const char *klass_name, int offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1920 public:
1921
1922 static int compute_injected_offset(InjectedFieldID id);
1923
1924 static void compute_offsets();
1925 static void check_offsets() PRODUCT_RETURN;
1926 static void serialize_offsets(SerializeClosure* soc) NOT_CDS_RETURN;
1927 static InjectedField* get_injected(Symbol* class_name, int* field_count);
1928 static bool is_supported_for_archiving(oop obj) NOT_CDS_JAVA_HEAP_RETURN_(false);
1929
1930 static void compute_offset(int &dest_offset,
1931 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol,
1932 bool is_static = false);
1933 static void compute_offset(int& dest_offset, InstanceKlass* ik,
1934 const char* name_string, Symbol* signature_symbol,
1935 bool is_static = false);
1936 };
1937
1938 #undef CHECK_INIT
1939
1940 #endif // SHARE_CLASSFILE_JAVACLASSES_HPP