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
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
263 static bool _offsets_computed;
264
265 static GrowableArray<Klass*>* _fixup_mirror_list;
266 static GrowableArray<Klass*>* _fixup_module_field_list;
267
268 static void set_init_lock(oop java_class, oop init_lock);
269 static void set_protection_domain(oop java_class, oop protection_domain);
270 static void set_class_loader(oop java_class, oop class_loader);
271 static void set_component_mirror(oop java_class, oop comp_mirror);
272
273 static void initialize_mirror_fields(Klass* k, 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 public:
277 static void allocate_fixup_lists();
278 static void compute_offsets();
279
280 // Instance creation
281 static void allocate_mirror(Klass* k, bool is_scratch, Handle protection_domain, Handle classData,
282 Handle& mirror, Handle& comp_mirror, TRAPS); // returns mirror and comp_mirror
283 static void create_mirror(Klass* k, Handle class_loader, Handle module,
284 Handle protection_domain, Handle classData, TRAPS);
285 static void fixup_mirror(Klass* k, TRAPS);
286 static oop create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS);
287
288 // Archiving
289 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
290 static void create_scratch_mirror(Klass* k, TRAPS) NOT_CDS_JAVA_HEAP_RETURN;
291 static bool restore_archived_mirror(Klass *k, Handle class_loader, Handle module,
292 Handle protection_domain,
293 TRAPS) NOT_CDS_JAVA_HEAP_RETURN_(false);
294
295 static void fixup_module_field(Klass* k, Handle module);
296
297 // Conversion
298 static Klass* as_Klass(oop java_class);
299 static void set_klass(oop java_class, Klass* klass);
300 static BasicType as_BasicType(oop java_class, Klass** reference_klass = nullptr);
301 static Symbol* as_signature(oop java_class, bool intern_if_not_found);
302 static void print_signature(oop java_class, outputStream *st);
303 static const char* as_external_name(oop java_class);
304 // Testing
305 static bool is_instance(oop obj);
306
307 static bool is_primitive(oop java_class);
308 static void set_is_primitive(oop java_class);
309 static BasicType primitive_type(oop java_class);
310 static oop primitive_mirror(BasicType t);
311 // JVM_NewArray support
312 static Klass* array_klass_acquire(oop java_class);
313 static void release_set_array_klass(oop java_class, Klass* klass);
314 // compiler support for class operations
315 static int klass_offset() { CHECK_INIT(_klass_offset); }
316 static int array_klass_offset() { CHECK_INIT(_array_klass_offset); }
317
318 // Support for classRedefinedCount field
319 static int classRedefinedCount(oop the_class_mirror);
320 static void set_classRedefinedCount(oop the_class_mirror, int value);
321
322 // Support for embedded per-class oops
323 static oop protection_domain(oop java_class);
324 static oop init_lock(oop java_class);
325 static void clear_init_lock(oop java_class) {
326 set_init_lock(java_class, nullptr);
327 }
328 static oop component_mirror(oop java_class);
329 static int component_mirror_offset() { return _component_mirror_offset; }
330 static objArrayOop signers(oop java_class);
331 static oop class_data(oop java_class);
332 static void set_class_data(oop java_class, oop classData);
333 static void set_reflection_data(oop java_class, oop reflection_data);
334 static int reflection_data_offset() { return _reflectionData_offset; }
335
336 static oop class_loader(oop java_class);
337 static void set_module(oop java_class, oop module);
338 static oop module(oop java_class);
339
340 static oop name(Handle java_class, TRAPS);
341
342 static oop source_file(oop java_class);
343 static void set_source_file(oop java_class, oop source_file);
344
345 static int modifiers(oop java_class);
346 static void set_modifiers(oop java_class, u2 value);
347
348 static size_t oop_size(oop java_class);
349 static void set_oop_size(HeapWord* java_class, size_t size);
350 static int static_oop_field_count(oop java_class);
351 static void set_static_oop_field_count(oop java_class, int size);
352
353 static GrowableArray<Klass*>* fixup_mirror_list() {
354 return _fixup_mirror_list;
355 }
356 static void set_fixup_mirror_list(GrowableArray<Klass*>* v) {
357 _fixup_mirror_list = v;
358 }
359
360 static GrowableArray<Klass*>* fixup_module_field_list() {
361 return _fixup_module_field_list;
362 }
363 static void set_fixup_module_field_list(GrowableArray<Klass*>* v) {
364 _fixup_module_field_list = v;
365 }
366
367 // Debugging
368 friend class JavaClasses;
369 };
370
371 // Interface to java.lang.Thread objects
372
373 #define THREAD_INJECTED_FIELDS(macro) \
374 macro(java_lang_Thread, jvmti_thread_state, intptr_signature, false) \
375 macro(java_lang_Thread, jvmti_VTMS_transition_disable_count, int_signature, false) \
376 macro(java_lang_Thread, jvmti_is_in_VTMS_transition, bool_signature, false) \
377 JFR_ONLY(macro(java_lang_Thread, jfr_epoch, short_signature, false))
378
379 class java_lang_Thread : AllStatic {
380 friend class java_lang_VirtualThread;
381 friend class JVMCIVMStructs;
382 private:
383 // Note that for this class the layout changed between JDK1.2 and JDK1.3,
384 // so we compute the offsets at startup rather than hard-wiring them.
385 static int _holder_offset;
386 static int _name_offset;
387 static int _contextClassLoader_offset;
388 static int _eetop_offset;
389 static int _jvmti_thread_state_offset;
390 static int _jvmti_VTMS_transition_disable_count_offset;
391 static int _jvmti_is_in_VTMS_transition_offset;
392 static int _interrupted_offset;
393 static int _interruptLock_offset;
394 static int _tid_offset;
395 static int _continuation_offset;
396 static int _park_blocker_offset;
397 static int _scopedValueBindings_offset;
398 JFR_ONLY(static int _jfr_epoch_offset;)
399
400 static void compute_offsets();
401
402 public:
403 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
404
405 // Returns the JavaThread associated with the thread obj
406 static JavaThread* thread(oop java_thread);
407 static JavaThread* thread_acquire(oop java_thread);
408 // Set JavaThread for instance
409 static void set_thread(oop java_thread, JavaThread* thread);
410 static void release_set_thread(oop java_thread, JavaThread* thread);
411 // FieldHolder
412 static oop holder(oop java_thread);
413 // interruptLock
414 static oop interrupt_lock(oop java_thread);
415 // Interrupted status
416 static bool interrupted(oop java_thread);
417 static void set_interrupted(oop java_thread, bool val);
418 // Name
419 static oop name(oop java_thread);
420 static void set_name(oop java_thread, oop name);
421 // Priority
422 static ThreadPriority priority(oop java_thread);
423 static void set_priority(oop java_thread, ThreadPriority priority);
424 // Thread group
425 static oop threadGroup(oop java_thread);
426 // Alive (NOTE: this is not really a field, but provides the correct
427 // definition without doing a Java call)
428 static bool is_alive(oop java_thread);
429 // Daemon
430 static bool is_daemon(oop java_thread);
431 static void set_daemon(oop java_thread);
432 // Context ClassLoader
433 static oop context_class_loader(oop java_thread);
434 // Stack size hint
435 static jlong stackSize(oop java_thread);
436 // Thread ID
437 static int64_t thread_id(oop java_thread);
438 static ByteSize thread_id_offset();
439 // Continuation
440 static inline oop continuation(oop java_thread);
441
442 static JvmtiThreadState* jvmti_thread_state(oop java_thread);
443 static void set_jvmti_thread_state(oop java_thread, JvmtiThreadState* state);
444 static int VTMS_transition_disable_count(oop java_thread);
445 static void inc_VTMS_transition_disable_count(oop java_thread);
446 static void dec_VTMS_transition_disable_count(oop java_thread);
447 static bool is_in_VTMS_transition(oop java_thread);
448 static void set_is_in_VTMS_transition(oop java_thread, bool val);
449 static int is_in_VTMS_transition_offset();
450
451 // Clear all scoped value bindings on error
452 static void clear_scopedValueBindings(oop java_thread);
453
454 // Blocker object responsible for thread parking
455 static oop park_blocker(oop java_thread);
456
457 // Write thread status info to threadStatus field of java.lang.Thread.
458 static void set_thread_status(oop java_thread_oop, JavaThreadStatus status);
459 // Read thread status info from threadStatus field of java.lang.Thread.
460 static JavaThreadStatus get_thread_status(oop java_thread_oop);
461
462 static const char* thread_status_name(oop java_thread_oop);
463
464 // Fill in current stack trace, can cause GC
465 static oop async_get_stack_trace(oop java_thread, TRAPS);
466
467 JFR_ONLY(static u2 jfr_epoch(oop java_thread);)
468 JFR_ONLY(static void set_jfr_epoch(oop java_thread, u2 epoch);)
469 JFR_ONLY(static int jfr_epoch_offset() { CHECK_INIT(_jfr_epoch_offset); })
470
471 // Debugging
472 friend class JavaClasses;
473 };
474
475 // Interface to java.lang.Thread$FieldHolder objects
476
477 class java_lang_Thread_FieldHolder : AllStatic {
478 private:
479 static int _group_offset;
480 static int _priority_offset;
481 static int _stackSize_offset;
482 static int _daemon_offset;
483 static int _thread_status_offset;
484
485 static void compute_offsets();
486
487 public:
488 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
489
490 static oop threadGroup(oop holder);
491
492 static ThreadPriority priority(oop holder);
493 static void set_priority(oop holder, ThreadPriority priority);
494
495 static jlong stackSize(oop holder);
496
497 static bool is_daemon(oop holder);
498 static void set_daemon(oop holder, bool val);
499
500 static void set_thread_status(oop holder, JavaThreadStatus status);
501 static JavaThreadStatus get_thread_status(oop holder);
502
503 friend class JavaClasses;
504 };
505
506 // Interface to java.lang.Thread$Constants objects
507
508 class java_lang_Thread_Constants : AllStatic {
509 private:
510 static int _static_VTHREAD_GROUP_offset;
511 static int _static_NOT_SUPPORTED_CLASSLOADER_offset;
512
513 static void compute_offsets();
514 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
515
516 public:
517 static oop get_VTHREAD_GROUP();
518
519 friend class JavaClasses;
520 };
521
522 // Interface to java.lang.ThreadGroup objects
523
524 class java_lang_ThreadGroup : AllStatic {
525 private:
526 static int _parent_offset;
527 static int _name_offset;
528 static int _maxPriority_offset;
529 static int _daemon_offset;
530
531 static void compute_offsets();
532 public:
533 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
534
535 // parent ThreadGroup
536 static oop parent(oop java_thread_group);
537 // name
538 static const char* name(oop java_thread_group);
539 // maxPriority in group
540 static ThreadPriority maxPriority(oop java_thread_group);
541 // Daemon
542 static bool is_daemon(oop java_thread_group);
543
544 // Debugging
545 friend class JavaClasses;
546 };
547
548
549 // Interface to java.lang.VirtualThread objects
550 #define VTHREAD_INJECTED_FIELDS(macro) \
551 macro(java_lang_VirtualThread, objectWaiter, intptr_signature, false)
552
553 class java_lang_VirtualThread : AllStatic {
554 private:
555 static int static_vthread_scope_offset;
556 static int _carrierThread_offset;
557 static int _continuation_offset;
558 static int _state_offset;
559 static int _next_offset;
560 static int _onWaitingList_offset;
561 static int _notified_offset;
562 static int _recheckInterval_offset;
563 static int _timeout_offset;
564 static int _objectWaiter_offset;
565 JFR_ONLY(static int _jfr_epoch_offset;)
566 public:
567 enum {
568 NEW = 0,
569 STARTED = 1,
570 RUNNING = 2,
571 PARKING = 3,
572 PARKED = 4,
573 PINNED = 5,
574 TIMED_PARKING = 6,
575 TIMED_PARKED = 7,
576 TIMED_PINNED = 8,
577 UNPARKED = 9,
578 YIELDING = 10,
579 YIELDED = 11,
580 BLOCKING = 12,
581 BLOCKED = 13,
582 UNBLOCKED = 14,
583 WAITING = 15,
584 WAIT = 16, // waiting in Object.wait
585 TIMED_WAITING = 17,
586 TIMED_WAIT = 18, // waiting in timed-Object.wait
587 TERMINATED = 99,
588
589 // additional state bits
590 SUSPENDED = 1 << 8, // suspended when unmounted
591 };
592
593 static void compute_offsets();
594 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
595
596 // Testers
597 static bool is_subclass(Klass* klass) {
598 return klass->is_subclass_of(vmClasses::VirtualThread_klass());
599 }
600 static bool is_instance(oop obj);
601
602 static oop vthread_scope();
603 static oop carrier_thread(oop vthread);
604 static oop continuation(oop vthread);
605 static int state(oop vthread);
606 static void set_state(oop vthread, int state);
607 static int cmpxchg_state(oop vthread, int old_state, int new_state);
608 static oop next(oop vthread);
609 static void set_next(oop vthread, oop next_vthread);
610 static bool set_onWaitingList(oop vthread, OopHandle& list_head);
611 static jlong timeout(oop vthread);
612 static void set_timeout(oop vthread, jlong value);
613 static void set_notified(oop vthread, jboolean value);
614 static bool is_preempted(oop vthread);
615 static JavaThreadStatus map_state_to_thread_status(int state);
616
617 static inline ObjectWaiter* objectWaiter(oop vthread);
618 static inline void set_objectWaiter(oop vthread, ObjectWaiter* waiter);
619 static ObjectMonitor* current_pending_monitor(oop vthread);
620 static ObjectMonitor* current_waiting_monitor(oop vthread);
621 };
622
623
624 // Interface to java.lang.Throwable objects
625
626 class java_lang_Throwable: AllStatic {
627 friend class BacktraceBuilder;
628 friend class BacktraceIterator;
629
630 private:
631 // Trace constants
632 enum {
633 trace_methods_offset = 0,
634 trace_bcis_offset = 1,
635 trace_mirrors_offset = 2,
636 trace_names_offset = 3,
637 trace_conts_offset = 4,
638 trace_next_offset = 5,
639 trace_hidden_offset = 6,
640 trace_size = 7,
641 trace_chunk_size = 32
642 };
643
644 static int _backtrace_offset;
645 static int _detailMessage_offset;
646 static int _stackTrace_offset;
647 static int _depth_offset;
648 static int _cause_offset;
649 static int _static_unassigned_stacktrace_offset;
650
651 // StackTrace (programmatic access, new since 1.4)
652 static void clear_stacktrace(oop throwable);
653 // Stacktrace (post JDK 1.7.0 to allow immutability protocol to be followed)
654 static void set_stacktrace(oop throwable, oop st_element_array);
655 static oop unassigned_stacktrace();
656
657 public:
658 // Backtrace
659 static oop backtrace(oop throwable);
660 static void set_backtrace(oop throwable, oop value);
661 static int depth(oop throwable);
662 static void set_depth(oop throwable, int value);
663 // Message
664 static int get_detailMessage_offset() { CHECK_INIT(_detailMessage_offset); }
665 static oop message(oop throwable);
666 static const char* message_as_utf8(oop throwable);
667 static void set_message(oop throwable, oop value);
668
669 static oop cause(oop throwable);
670
671 static void print_stack_element(outputStream *st, Method* method, int bci);
672
673 static void compute_offsets();
674 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
675
676 // Allocate space for backtrace (created but stack trace not filled in)
677 static void allocate_backtrace(Handle throwable, TRAPS);
678 // Fill in current stack trace for throwable with preallocated backtrace (no GC)
679 static void fill_in_stack_trace_of_preallocated_backtrace(Handle throwable);
680 // Fill in current stack trace, can cause GC
681 static void fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS);
682 static void fill_in_stack_trace(Handle throwable, const methodHandle& method = methodHandle());
683
684 // Programmatic access to stack trace
685 static void get_stack_trace_elements(int depth, Handle backtrace, objArrayHandle stack_trace, TRAPS);
686
687 // For recreating class initialization error exceptions.
688 static Handle create_initialization_error(JavaThread* current, Handle throwable);
689
690 // Printing
691 static void print(oop throwable, outputStream* st);
692 static void print_stack_trace(Handle throwable, outputStream* st);
693 static void java_printStackTrace(Handle throwable, TRAPS);
694 // Debugging
695 friend class JavaClasses;
696 // Gets the method and bci of the top frame (TOS). Returns false if this failed.
697 static bool get_top_method_and_bci(oop throwable, Method** method, int* bci);
698 };
699
700
701 // Interface to java.lang.reflect.AccessibleObject objects
702
703 class java_lang_reflect_AccessibleObject: AllStatic {
704 private:
705 // Note that to reduce dependencies on the JDK we compute these
706 // offsets at run-time.
707 static int _override_offset;
708
709 static void compute_offsets();
710
711 public:
712 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
713
714 // Accessors
715 static jboolean override(oop reflect);
716 static void set_override(oop reflect, jboolean value);
717
718 // Debugging
719 friend class JavaClasses;
720 };
721
722
723 // Interface to java.lang.reflect.Method objects
724
725 class java_lang_reflect_Method : public java_lang_reflect_AccessibleObject {
726 private:
727 // Note that to reduce dependencies on the JDK we compute these
728 // offsets at run-time.
729 static int _clazz_offset;
730 static int _name_offset;
731 static int _returnType_offset;
732 static int _parameterTypes_offset;
733 static int _exceptionTypes_offset;
734 static int _slot_offset;
735 static int _modifiers_offset;
736 static int _signature_offset;
737 static int _annotations_offset;
738 static int _parameter_annotations_offset;
739 static int _annotation_default_offset;
740
741 static void compute_offsets();
742 public:
743 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
744
745 // Allocation
746 static Handle create(TRAPS);
747
748 // Accessors
749 static oop clazz(oop reflect);
750 static void set_clazz(oop reflect, oop value);
751
752 static void set_name(oop method, oop value);
753
754 static oop return_type(oop method);
755 static void set_return_type(oop method, oop value);
756
757 static oop parameter_types(oop method);
758 static void set_parameter_types(oop method, oop value);
759
760 static int slot(oop reflect);
761 static void set_slot(oop reflect, int value);
762
763 static void set_exception_types(oop method, oop value);
764 static void set_modifiers(oop method, int value);
765 static void set_signature(oop method, oop value);
766 static void set_annotations(oop method, oop value);
767 static void set_parameter_annotations(oop method, oop value);
768 static void set_annotation_default(oop method, oop value);
769
770 // Debugging
771 friend class JavaClasses;
772 };
773
774
775 // Interface to java.lang.reflect.Constructor objects
776
777 class java_lang_reflect_Constructor : public java_lang_reflect_AccessibleObject {
778 private:
779 // Note that to reduce dependencies on the JDK we compute these
780 // offsets at run-time.
781 static int _clazz_offset;
782 static int _parameterTypes_offset;
783 static int _exceptionTypes_offset;
784 static int _slot_offset;
785 static int _modifiers_offset;
786 static int _signature_offset;
787 static int _annotations_offset;
788 static int _parameter_annotations_offset;
789
790 static void compute_offsets();
791 public:
792 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
793
794 // Allocation
795 static Handle create(TRAPS);
796
797 // Accessors
798 static oop clazz(oop reflect);
799 static void set_clazz(oop reflect, oop value);
800
801 static oop parameter_types(oop constructor);
802 static void set_parameter_types(oop constructor, oop value);
803
804 static int slot(oop reflect);
805 static void set_slot(oop reflect, int value);
806
807 static void set_exception_types(oop constructor, oop value);
808 static void set_modifiers(oop constructor, int value);
809 static void set_signature(oop constructor, oop value);
810 static void set_annotations(oop constructor, oop value);
811 static void set_parameter_annotations(oop method, oop value);
812
813 // Debugging
814 friend class JavaClasses;
815 };
816
817
818 // Interface to java.lang.reflect.Field objects
819
820 class java_lang_reflect_Field : public java_lang_reflect_AccessibleObject {
821 private:
822 // Note that to reduce dependencies on the JDK we compute these
823 // offsets at run-time.
824 static int _clazz_offset;
825 static int _name_offset;
826 static int _type_offset;
827 static int _slot_offset;
828 static int _modifiers_offset;
829 static int _flags_offset;
830 static int _signature_offset;
831 static int _annotations_offset;
832
833 static void compute_offsets();
834
835 public:
836 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
837
838 // Allocation
839 static Handle create(TRAPS);
840
841 // Accessors
842 static oop clazz(oop reflect);
843 static void set_clazz(oop reflect, oop value);
844
845 static oop name(oop field);
846 static void set_name(oop field, oop value);
847
848 static oop type(oop field);
849 static void set_type(oop field, oop value);
850
851 static int slot(oop reflect);
852 static void set_slot(oop reflect, int value);
853
854 static int modifiers(oop field);
855 static void set_modifiers(oop field, int value);
856
857 static void set_flags(oop field, int value);
858
859 static void set_signature(oop constructor, oop value);
860 static void set_annotations(oop constructor, oop value);
861
862 // Debugging
863 friend class JavaClasses;
864 };
865
866 class java_lang_reflect_Parameter {
867 private:
868 // Note that to reduce dependencies on the JDK we compute these
869 // offsets at run-time.
870 static int _name_offset;
871 static int _modifiers_offset;
872 static int _index_offset;
873 static int _executable_offset;
874
875 static void compute_offsets();
876
877 public:
878 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
879
880 // Allocation
881 static Handle create(TRAPS);
882
883 // Accessors
884 static oop name(oop field);
885 static void set_name(oop field, oop value);
886
887 static int index(oop reflect);
888 static void set_index(oop reflect, int value);
889
890 static int modifiers(oop reflect);
891 static void set_modifiers(oop reflect, int value);
892
893 static oop executable(oop constructor);
894 static void set_executable(oop constructor, oop value);
895
896 friend class JavaClasses;
897 };
898
899 #define MODULE_INJECTED_FIELDS(macro) \
900 macro(java_lang_Module, module_entry, intptr_signature, false)
901
902 class java_lang_Module {
903 private:
904 static int _loader_offset;
905 static int _name_offset;
906 static int _module_entry_offset;
907
908 static void compute_offsets();
909
910 public:
911 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
912
913 // Allocation
914 static Handle create(Handle loader, Handle module_name, TRAPS);
915
916 // Testers
917 static bool is_instance(oop obj);
918
919 // Accessors
920 static oop loader(oop module);
921 static void set_loader(oop module, oop value);
922
923 // CDS
924 static int module_entry_offset() { return _module_entry_offset; }
925
926 static oop name(oop module);
927 static void set_name(oop module, oop value);
928
929 static ModuleEntry* module_entry(oop module);
930 static ModuleEntry* module_entry_raw(oop module);
931 static void set_module_entry(oop module, ModuleEntry* module_entry);
932
933 friend class JavaClasses;
934 };
935
936 // Interface to jdk.internal.reflect.ConstantPool objects
937 class reflect_ConstantPool {
938 private:
939 // Note that to reduce dependencies on the JDK we compute these
940 // offsets at run-time.
941 static int _oop_offset;
942
943 static void compute_offsets();
944
945 public:
946 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
947
948 // Allocation
949 static Handle create(TRAPS);
950
951 // Accessors
952 static void set_cp(oop reflect, ConstantPool* value);
953 static int oop_offset() { CHECK_INIT(_oop_offset); }
954
955 static ConstantPool* get_cp(oop reflect);
956
957 // Debugging
958 friend class JavaClasses;
959 };
960
961
962 // Interface to java.lang primitive type boxing objects:
963 // - java.lang.Boolean
964 // - java.lang.Character
965 // - java.lang.Float
966 // - java.lang.Double
967 // - java.lang.Byte
968 // - java.lang.Short
969 // - java.lang.Integer
970 // - java.lang.Long
971
972 // This could be separated out into 8 individual classes.
973
974 class java_lang_boxing_object: AllStatic {
975 private:
976 static int _sub32bits_value_offset;
977 static int _32bits_value_offset;
978 static int _64bits_value_offset;
979
980 static void compute_offsets();
981 static oop initialize_and_allocate(BasicType type, TRAPS);
982 public:
983 // Allocation. Returns a boxed value, or null for invalid type.
984 static oop create(BasicType type, jvalue* value, TRAPS);
985 // Accessors. Returns the basic type being boxed, or T_ILLEGAL for invalid oop.
986 static BasicType get_value(oop box, jvalue* value);
987 static BasicType set_value(oop box, jvalue* value);
988 static BasicType basic_type(oop box);
989 static bool is_instance(oop box) { return basic_type(box) != T_ILLEGAL; }
990 static bool is_instance(oop box, BasicType type) { return basic_type(box) == type; }
991 static void print(oop box, outputStream* st) { jvalue value; print(get_value(box, &value), &value, st); }
992 static void print(BasicType type, jvalue* value, outputStream* st);
993
994 static int value_offset(BasicType type) {
995 if (type == T_INT || type == T_FLOAT) return _32bits_value_offset;
996 return is_double_word_type(type) ? _64bits_value_offset : _sub32bits_value_offset;
997 }
998
999 static void serialize_offsets(SerializeClosure* f);
1000
1001 // Debugging
1002 friend class JavaClasses;
1003 };
1004
1005
1006
1007 // Interface to java.lang.ref.Reference objects
1008
1009 class java_lang_ref_Reference: AllStatic {
1010 static int _referent_offset;
1011 static int _queue_offset;
1012 static int _next_offset;
1013 static int _discovered_offset;
1014
1015 static bool _offsets_initialized;
1016
1017 public:
1018 // Accessors
1019 static inline oop weak_referent_no_keepalive(oop ref);
1020 static inline oop weak_referent(oop ref);
1021 static inline oop phantom_referent_no_keepalive(oop ref);
1022 static inline oop unknown_referent_no_keepalive(oop ref);
1023 static inline void clear_referent(oop ref);
1024 static inline void clear_referent_raw(oop ref);
1025 static inline HeapWord* referent_addr_raw(oop ref);
1026 static inline oop next(oop ref);
1027 static inline void set_next(oop ref, oop value);
1028 static inline void set_next_raw(oop ref, oop value);
1029 static inline HeapWord* next_addr_raw(oop ref);
1030 static inline oop discovered(oop ref);
1031 static inline void set_discovered(oop ref, oop value);
1032 static inline void set_discovered_raw(oop ref, oop value);
1033 static inline HeapWord* discovered_addr_raw(oop ref);
1034 static bool is_referent_field(oop obj, ptrdiff_t offset);
1035 static inline bool is_final(oop ref);
1036 static inline bool is_phantom(oop ref);
1037 static inline bool is_weak(oop ref);
1038 static inline bool is_soft(oop ref);
1039
1040 static int referent_offset() { CHECK_INIT(_referent_offset); }
1041 static int queue_offset() { CHECK_INIT(_queue_offset); }
1042 static int next_offset() { CHECK_INIT(_next_offset); }
1043 static int discovered_offset() { CHECK_INIT(_discovered_offset); }
1044
1045 static void compute_offsets();
1046 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1047 };
1048
1049
1050 // Interface to java.lang.ref.SoftReference objects
1051
1052 class java_lang_ref_SoftReference: public java_lang_ref_Reference {
1053 static int _timestamp_offset;
1054 static int _static_clock_offset;
1055
1056 public:
1057 // Accessors
1058 static jlong timestamp(oop ref);
1059
1060 // Accessors for statics
1061 static jlong clock();
1062 static void set_clock(jlong value);
1063
1064 static void compute_offsets();
1065 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1066 };
1067
1068 // Interface to java.lang.invoke.MethodHandle objects
1069
1070 class java_lang_invoke_MethodHandle: AllStatic {
1071 friend class JavaClasses;
1072
1073 private:
1074 static int _type_offset; // the MethodType of this MH
1075 static int _form_offset; // the LambdaForm of this MH
1076
1077 static void compute_offsets();
1078
1079 public:
1080 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1081
1082 // Accessors
1083 static oop type(oop mh);
1084 static void set_type(oop mh, oop mtype);
1085
1086 static oop form(oop mh);
1087 static void set_form(oop mh, oop lform);
1088
1089 // Testers
1090 static bool is_subclass(Klass* klass) {
1091 return klass->is_subclass_of(vmClasses::MethodHandle_klass());
1092 }
1093 static bool is_instance(oop obj);
1094
1095 // Accessors for code generation:
1096 static int type_offset() { CHECK_INIT(_type_offset); }
1097 static int form_offset() { CHECK_INIT(_form_offset); }
1098 };
1099
1100 // Interface to java.lang.invoke.DirectMethodHandle objects
1101
1102 class java_lang_invoke_DirectMethodHandle: AllStatic {
1103 friend class JavaClasses;
1104
1105 private:
1106 static int _member_offset; // the MemberName of this DMH
1107
1108 static void compute_offsets();
1109
1110 public:
1111 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1112
1113 // Accessors
1114 static oop member(oop mh);
1115
1116 // Testers
1117 static bool is_subclass(Klass* klass) {
1118 return klass->is_subclass_of(vmClasses::DirectMethodHandle_klass());
1119 }
1120 static bool is_instance(oop obj);
1121
1122 // Accessors for code generation:
1123 static int member_offset() { CHECK_INIT(_member_offset); }
1124 };
1125
1126 // Interface to java.lang.invoke.LambdaForm objects
1127 // (These are a private interface for managing adapter code generation.)
1128
1129 class java_lang_invoke_LambdaForm: AllStatic {
1130 friend class JavaClasses;
1131
1132 private:
1133 static int _vmentry_offset; // type is MemberName
1134
1135 static void compute_offsets();
1136
1137 public:
1138 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1139
1140 // Accessors
1141 static oop vmentry(oop lform);
1142
1143 // Testers
1144 static bool is_subclass(Klass* klass) {
1145 return vmClasses::LambdaForm_klass() != nullptr &&
1146 klass->is_subclass_of(vmClasses::LambdaForm_klass());
1147 }
1148 static bool is_instance(oop obj);
1149
1150 // Accessors for code generation:
1151 static int vmentry_offset() { CHECK_INIT(_vmentry_offset); }
1152 };
1153
1154 // Interface to java.lang.invoke.NativeEntryPoint objects
1155 // (These are a private interface for managing adapter code generation.)
1156
1157 class jdk_internal_foreign_abi_NativeEntryPoint: AllStatic {
1158 friend class JavaClasses;
1159
1160 private:
1161 static int _method_type_offset;
1162 static int _downcall_stub_address_offset;
1163
1164 static void compute_offsets();
1165
1166 public:
1167 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1168
1169 // Accessors
1170 static oop method_type(oop entry);
1171 static jlong downcall_stub_address(oop entry);
1172
1173 // Testers
1174 static bool is_subclass(Klass* klass) {
1175 return vmClasses::NativeEntryPoint_klass() != nullptr &&
1176 klass->is_subclass_of(vmClasses::NativeEntryPoint_klass());
1177 }
1178 static bool is_instance(oop obj);
1179
1180 // Accessors for code generation:
1181 static int method_type_offset_in_bytes() { return _method_type_offset; }
1182 static int downcall_stub_address_offset_in_bytes() { return _downcall_stub_address_offset; }
1183 };
1184
1185 class jdk_internal_foreign_abi_ABIDescriptor: AllStatic {
1186 friend class JavaClasses;
1187
1188 private:
1189 static int _inputStorage_offset;
1190 static int _outputStorage_offset;
1191 static int _volatileStorage_offset;
1192 static int _stackAlignment_offset;
1193 static int _shadowSpace_offset;
1194 static int _scratch1_offset;
1195 static int _scratch2_offset;
1196
1197 static void compute_offsets();
1198
1199 public:
1200 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1201
1202 // Accessors
1203 static objArrayOop inputStorage(oop entry);
1204 static objArrayOop outputStorage(oop entry);
1205 static objArrayOop volatileStorage(oop entry);
1206 static jint stackAlignment(oop entry);
1207 static jint shadowSpace(oop entry);
1208 static oop scratch1(oop entry);
1209 static oop scratch2(oop entry);
1210
1211 // Testers
1212 static bool is_subclass(Klass* klass) {
1213 return vmClasses::ABIDescriptor_klass() != nullptr &&
1214 klass->is_subclass_of(vmClasses::ABIDescriptor_klass());
1215 }
1216 static bool is_instance(oop obj);
1217 };
1218
1219 class jdk_internal_foreign_abi_VMStorage: AllStatic {
1220 friend class JavaClasses;
1221
1222 private:
1223 static int _type_offset;
1224 static int _indexOrOffset_offset;
1225 static int _segmentMaskOrSize_offset;
1226 static int _debugName_offset;
1227
1228 static void compute_offsets();
1229
1230 public:
1231 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1232
1233 // Accessors
1234 static jbyte type(oop entry);
1235 static jint index_or_offset(oop entry);
1236 static jshort segment_mask_or_size(oop entry);
1237 static oop debugName(oop entry);
1238
1239 // Testers
1240 static bool is_subclass(Klass* klass) {
1241 return vmClasses::VMStorage_klass() != nullptr &&
1242 klass->is_subclass_of(vmClasses::VMStorage_klass());
1243 }
1244 static bool is_instance(oop obj);
1245 };
1246
1247 class jdk_internal_foreign_abi_CallConv: AllStatic {
1248 friend class JavaClasses;
1249
1250 private:
1251 static int _argRegs_offset;
1252 static int _retRegs_offset;
1253
1254 static void compute_offsets();
1255
1256 public:
1257 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1258
1259 // Accessors
1260 static objArrayOop argRegs(oop entry);
1261 static objArrayOop retRegs(oop entry);
1262
1263 // Testers
1264 static bool is_subclass(Klass* klass) {
1265 return vmClasses::CallConv_klass() != nullptr &&
1266 klass->is_subclass_of(vmClasses::CallConv_klass());
1267 }
1268 static bool is_instance(oop obj);
1269 };
1270
1271 // Interface to java.lang.invoke.MemberName objects
1272 // (These are a private interface for Java code to query the class hierarchy.)
1273
1274 #define RESOLVEDMETHOD_INJECTED_FIELDS(macro) \
1275 macro(java_lang_invoke_ResolvedMethodName, vmtarget, intptr_signature, false)
1276
1277 class java_lang_invoke_ResolvedMethodName : AllStatic {
1278 friend class JavaClasses;
1279
1280 static int _vmtarget_offset;
1281 static int _vmholder_offset;
1282
1283 static void compute_offsets();
1284 public:
1285 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1286
1287 static int vmtarget_offset() { CHECK_INIT(_vmtarget_offset); }
1288
1289 static Method* vmtarget(oop resolved_method);
1290 static void set_vmtarget(oop resolved_method, Method* method);
1291
1292 static void set_vmholder(oop resolved_method, oop holder);
1293
1294 // find or create resolved member name
1295 static oop find_resolved_method(const methodHandle& m, TRAPS);
1296
1297 static bool is_instance(oop resolved_method);
1298 };
1299
1300
1301 #define MEMBERNAME_INJECTED_FIELDS(macro) \
1302 macro(java_lang_invoke_MemberName, vmindex, intptr_signature, false)
1303
1304
1305 class java_lang_invoke_MemberName: AllStatic {
1306 friend class JavaClasses;
1307
1308 private:
1309 // From java.lang.invoke.MemberName:
1310 // private Class<?> clazz; // class in which the method is defined
1311 // private String name; // may be null if not yet materialized
1312 // private Object type; // may be null if not yet materialized
1313 // private int flags; // modifier bits; see reflect.Modifier
1314 // private ResolvedMethodName method; // holds VM-specific target value
1315 // private intptr_t vmindex; // member index within class or interface
1316 static int _clazz_offset;
1317 static int _name_offset;
1318 static int _type_offset;
1319 static int _flags_offset;
1320 static int _method_offset;
1321 static int _vmindex_offset;
1322
1323 static void compute_offsets();
1324
1325 public:
1326 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1327 // Accessors
1328 static oop clazz(oop mname);
1329 static void set_clazz(oop mname, oop clazz);
1330
1331 static oop type(oop mname);
1332 static void set_type(oop mname, oop type);
1333
1334 static oop name(oop mname);
1335 static void set_name(oop mname, oop name);
1336
1337 static int flags(oop mname);
1338 static void set_flags(oop mname, int flags);
1339
1340 // Link through ResolvedMethodName field to get Method*
1341 static Method* vmtarget(oop mname);
1342 static void set_method(oop mname, oop method);
1343
1344 static intptr_t vmindex(oop mname);
1345 static void set_vmindex(oop mname, intptr_t index);
1346
1347 // Testers
1348 static bool is_subclass(Klass* klass) {
1349 return klass->is_subclass_of(vmClasses::MemberName_klass());
1350 }
1351 static bool is_instance(oop obj);
1352
1353 static bool is_method(oop obj);
1354
1355 // Relevant integer codes (keep these in synch. with MethodHandleNatives.Constants):
1356 enum {
1357 MN_IS_METHOD = 0x00010000, // method (not constructor)
1358 MN_IS_OBJECT_CONSTRUCTOR = 0x00020000, // constructor
1359 MN_IS_FIELD = 0x00040000, // field
1360 MN_IS_TYPE = 0x00080000, // nested type
1361 MN_CALLER_SENSITIVE = 0x00100000, // @CallerSensitive annotation detected
1362 MN_TRUSTED_FINAL = 0x00200000, // trusted final field
1363 MN_HIDDEN_MEMBER = 0x00400000, // @Hidden annotation detected
1364 MN_NULL_RESTRICTED_FIELD = 0x00800000, // null-restricted field
1365 MN_REFERENCE_KIND_SHIFT = 24, // refKind
1366 MN_REFERENCE_KIND_MASK = 0x0F000000 >> MN_REFERENCE_KIND_SHIFT, // 4 bits
1367 MN_LAYOUT_SHIFT = 28, // field layout
1368 MN_LAYOUT_MASK = 0x70000000 >> MN_LAYOUT_SHIFT, // 3 bits
1369 MN_NESTMATE_CLASS = 0x00000001,
1370 MN_HIDDEN_CLASS = 0x00000002,
1371 MN_STRONG_LOADER_LINK = 0x00000004,
1372 MN_ACCESS_VM_ANNOTATIONS = 0x00000008,
1373 // Lookup modes
1374 MN_MODULE_MODE = 0x00000010,
1375 MN_UNCONDITIONAL_MODE = 0x00000020,
1376 MN_TRUSTED_MODE = -1
1377 };
1378
1379 // Accessors for code generation:
1380 static int clazz_offset() { CHECK_INIT(_clazz_offset); }
1381 static int type_offset() { CHECK_INIT(_type_offset); }
1382 static int flags_offset() { CHECK_INIT(_flags_offset); }
1383 static int method_offset() { CHECK_INIT(_method_offset); }
1384 static int vmindex_offset() { CHECK_INIT(_vmindex_offset); }
1385 };
1386
1387
1388 // Interface to java.lang.invoke.MethodType objects
1389
1390 class java_lang_invoke_MethodType: AllStatic {
1391 friend class JavaClasses;
1392
1393 private:
1394 static int _rtype_offset;
1395 static int _ptypes_offset;
1396
1397 static void compute_offsets();
1398
1399 public:
1400 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1401 // Accessors
1402 static oop rtype(oop mt);
1403 static objArrayOop ptypes(oop mt);
1404
1405 static oop ptype(oop mt, int index);
1406 static int ptype_count(oop mt);
1407
1408 static int ptype_slot_count(oop mt); // extra counts for long/double
1409 static int rtype_slot_count(oop mt); // extra counts for long/double
1410
1411 static Symbol* as_signature(oop mt, bool intern_if_not_found);
1412 static void print_signature(oop mt, outputStream* st);
1413
1414 static bool is_instance(oop obj);
1415
1416 static bool equals(oop mt1, oop mt2);
1417
1418 // Accessors for code generation:
1419 static int rtype_offset() { CHECK_INIT(_rtype_offset); }
1420 static int ptypes_offset() { CHECK_INIT(_ptypes_offset); }
1421 };
1422
1423
1424 // Interface to java.lang.invoke.CallSite objects
1425 #define CALLSITE_INJECTED_FIELDS(macro) \
1426 macro(java_lang_invoke_CallSite, vmdependencies, intptr_signature, false) \
1427 macro(java_lang_invoke_CallSite, last_cleanup, long_signature, false)
1428
1429 class java_lang_invoke_CallSite: AllStatic {
1430 friend class JavaClasses;
1431
1432 private:
1433 static int _target_offset;
1434 static int _vmdependencies_offset;
1435 static int _last_cleanup_offset;
1436
1437 static void compute_offsets();
1438
1439 public:
1440 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1441 // Accessors
1442 static oop target( oop site);
1443 static void set_target( oop site, oop target);
1444 static void set_target_volatile( oop site, oop target);
1445
1446 static DependencyContext vmdependencies(oop call_site);
1447
1448 // Testers
1449 static bool is_subclass(Klass* klass) {
1450 return klass->is_subclass_of(vmClasses::CallSite_klass());
1451 }
1452 static bool is_instance(oop obj);
1453
1454 // Accessors for code generation:
1455 static int target_offset() { CHECK_INIT(_target_offset); }
1456 };
1457
1458 // Interface to java.lang.invoke.ConstantCallSite objects
1459
1460 class java_lang_invoke_ConstantCallSite: AllStatic {
1461 friend class JavaClasses;
1462
1463 private:
1464 static int _is_frozen_offset;
1465
1466 static void compute_offsets();
1467
1468 public:
1469 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1470 // Accessors
1471 static jboolean is_frozen(oop site);
1472
1473 // Testers
1474 static bool is_subclass(Klass* klass) {
1475 return klass->is_subclass_of(vmClasses::ConstantCallSite_klass());
1476 }
1477 static bool is_instance(oop obj);
1478 };
1479
1480 // Interface to java.lang.ClassLoader objects
1481
1482 #define CLASSLOADER_INJECTED_FIELDS(macro) \
1483 macro(java_lang_ClassLoader, loader_data, intptr_signature, false)
1484
1485 class java_lang_ClassLoader : AllStatic {
1486 private:
1487 static int _loader_data_offset;
1488 static int _parent_offset;
1489 static int _parallelCapable_offset;
1490 static int _name_offset;
1491 static int _nameAndId_offset;
1492 static int _unnamedModule_offset;
1493
1494 static void compute_offsets();
1495
1496 public:
1497 // Support for CDS
1498 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1499 static int loader_data_offset() { return _loader_data_offset; }
1500
1501 static ClassLoaderData* loader_data_acquire(oop loader);
1502 static ClassLoaderData* loader_data(oop loader);
1503 static void release_set_loader_data(oop loader, ClassLoaderData* new_data);
1504
1505 static oop parent(oop loader);
1506 static oop parent_no_keepalive(oop loader);
1507 static oop name(oop loader);
1508 static oop nameAndId(oop loader);
1509 static bool isAncestor(oop loader, oop cl);
1510
1511 // Support for parallelCapable field
1512 static bool parallelCapable(oop the_class_mirror);
1513
1514 static bool is_trusted_loader(oop loader);
1515
1516 // Testers
1517 static bool is_subclass(Klass* klass) {
1518 return klass->is_subclass_of(vmClasses::ClassLoader_klass());
1519 }
1520 static bool is_instance(oop obj);
1521
1522 static oop unnamedModule(oop loader);
1523
1524 // Debugging
1525 friend class JavaClasses;
1526 };
1527
1528
1529 // Interface to java.lang.System objects
1530
1531 class java_lang_System : AllStatic {
1532 private:
1533 static int _static_in_offset;
1534 static int _static_out_offset;
1535 static int _static_err_offset;
1536
1537 public:
1538 static int in_offset() { CHECK_INIT(_static_in_offset); }
1539 static int out_offset() { CHECK_INIT(_static_out_offset); }
1540 static int err_offset() { CHECK_INIT(_static_err_offset); }
1541
1542 static void compute_offsets();
1543 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1544
1545 // Debugging
1546 friend class JavaClasses;
1547 };
1548
1549
1550 // Interface to java.lang.StackTraceElement objects
1551
1552 class java_lang_StackTraceElement: AllStatic {
1553 private:
1554 static int _declaringClassObject_offset;
1555 static int _classLoaderName_offset;
1556 static int _moduleName_offset;
1557 static int _moduleVersion_offset;
1558 static int _declaringClass_offset;
1559 static int _methodName_offset;
1560 static int _fileName_offset;
1561 static int _lineNumber_offset;
1562
1563 // Setters
1564 static void set_classLoaderName(oop element, oop value);
1565 static void set_moduleName(oop element, oop value);
1566 static void set_moduleVersion(oop element, oop value);
1567 static void set_declaringClass(oop element, oop value);
1568 static void set_methodName(oop element, oop value);
1569 static void set_fileName(oop element, oop value);
1570 static void set_lineNumber(oop element, int value);
1571 static void set_declaringClassObject(oop element, oop value);
1572
1573 static void decode_file_and_line(Handle java_mirror, InstanceKlass* holder, int version,
1574 const methodHandle& method, int bci,
1575 Symbol*& source, oop& source_file, int& line_number, TRAPS);
1576
1577 public:
1578 // Create an instance of StackTraceElement
1579 static oop create(const methodHandle& method, int bci, TRAPS);
1580
1581 static void fill_in(Handle element, InstanceKlass* holder, const methodHandle& method,
1582 int version, int bci, Symbol* name, TRAPS);
1583
1584 static void compute_offsets();
1585 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1586
1587 #if INCLUDE_JVMCI
1588 static void decode(const methodHandle& method, int bci, Symbol*& fileName, int& lineNumber, TRAPS);
1589 #endif
1590
1591 // Debugging
1592 friend class JavaClasses;
1593 };
1594
1595
1596 class Backtrace: AllStatic {
1597 public:
1598 // Helper backtrace functions to store bci|version together.
1599 static int merge_bci_and_version(int bci, int version);
1600 static int merge_mid_and_cpref(int mid, int cpref);
1601 static int bci_at(unsigned int merged);
1602 static int version_at(unsigned int merged);
1603 static int mid_at(unsigned int merged);
1604 static int cpref_at(unsigned int merged);
1605 static int get_line_number(Method* method, int bci);
1606 static Symbol* get_source_file_name(InstanceKlass* holder, int version);
1607
1608 // Debugging
1609 friend class JavaClasses;
1610 };
1611
1612 class java_lang_ClassFrameInfo: AllStatic {
1613 private:
1614 static int _classOrMemberName_offset;
1615 static int _flags_offset;
1616
1617 public:
1618 static oop classOrMemberName(oop info);
1619 static int flags(oop info);
1620
1621 // Setters
1622 static void init_class(Handle stackFrame, const methodHandle& m);
1623 static void init_method(Handle stackFrame, const methodHandle& m, TRAPS);
1624
1625 static void compute_offsets();
1626 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1627
1628 // Debugging
1629 friend class JavaClasses;
1630 };
1631
1632 // Interface to java.lang.StackFrameInfo objects
1633
1634 #define STACKFRAMEINFO_INJECTED_FIELDS(macro) \
1635 macro(java_lang_StackFrameInfo, version, short_signature, false)
1636
1637 class java_lang_StackFrameInfo: AllStatic {
1638 private:
1639 static int _type_offset;
1640 static int _name_offset;
1641 static int _bci_offset;
1642 static int _version_offset;
1643 static int _contScope_offset;
1644
1645 public:
1646 // Getters
1647 static oop name(oop info);
1648 static oop type(oop info);
1649 static Method* get_method(oop info);
1650
1651 // Setters
1652 static void set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, oop cont, TRAPS);
1653 static void set_name(oop info, oop value);
1654 static void set_type(oop info, oop value);
1655 static void set_bci(oop info, int value);
1656
1657 static void set_version(oop info, short value);
1658 static void set_contScope(oop info, oop value);
1659
1660 static void compute_offsets();
1661 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1662
1663 static void to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS);
1664
1665 // Debugging
1666 friend class JavaClasses;
1667 };
1668
1669 class java_lang_LiveStackFrameInfo: AllStatic {
1670 private:
1671 static int _monitors_offset;
1672 static int _locals_offset;
1673 static int _operands_offset;
1674 static int _mode_offset;
1675
1676 public:
1677 static void set_monitors(oop info, oop value);
1678 static void set_locals(oop info, oop value);
1679 static void set_operands(oop info, oop value);
1680 static void set_mode(oop info, int value);
1681
1682 static void compute_offsets();
1683 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1684
1685 // Debugging
1686 friend class JavaClasses;
1687 };
1688
1689 // Interface to java.lang.reflect.RecordComponent objects
1690
1691 class java_lang_reflect_RecordComponent: AllStatic {
1692 private:
1693 static int _clazz_offset;
1694 static int _name_offset;
1695 static int _type_offset;
1696 static int _accessor_offset;
1697 static int _signature_offset;
1698 static int _annotations_offset;
1699 static int _typeAnnotations_offset;
1700
1701 // Setters
1702 static void set_clazz(oop element, oop value);
1703 static void set_name(oop element, oop value);
1704 static void set_type(oop element, oop value);
1705 static void set_accessor(oop element, oop value);
1706 static void set_signature(oop element, oop value);
1707 static void set_annotations(oop element, oop value);
1708 static void set_typeAnnotations(oop element, oop value);
1709
1710 public:
1711 // Create an instance of RecordComponent
1712 static oop create(InstanceKlass* holder, RecordComponent* component, TRAPS);
1713
1714 static void compute_offsets();
1715 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1716
1717 // Debugging
1718 friend class JavaClasses;
1719 };
1720
1721
1722 // Interface to java.lang.AssertionStatusDirectives objects
1723
1724 class java_lang_AssertionStatusDirectives: AllStatic {
1725 private:
1726 static int _classes_offset;
1727 static int _classEnabled_offset;
1728 static int _packages_offset;
1729 static int _packageEnabled_offset;
1730 static int _deflt_offset;
1731
1732 public:
1733 // Setters
1734 static void set_classes(oop obj, oop val);
1735 static void set_classEnabled(oop obj, oop val);
1736 static void set_packages(oop obj, oop val);
1737 static void set_packageEnabled(oop obj, oop val);
1738 static void set_deflt(oop obj, bool val);
1739
1740 static void compute_offsets();
1741 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1742
1743 // Debugging
1744 friend class JavaClasses;
1745 };
1746
1747
1748 class java_util_concurrent_locks_AbstractOwnableSynchronizer : AllStatic {
1749 private:
1750 static int _owner_offset;
1751 public:
1752 static void compute_offsets();
1753 static oop get_owner_threadObj(oop obj);
1754 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1755 };
1756
1757 // Interface to jdk.internal.misc.UnsafeConsants
1758
1759 class jdk_internal_misc_UnsafeConstants : AllStatic {
1760 public:
1761 static void set_unsafe_constants();
1762 static void compute_offsets() { }
1763 static void serialize_offsets(SerializeClosure* f) { }
1764 };
1765
1766 // Interface to jdk.internal.vm.vector.VectorSupport.VectorPayload objects
1767
1768 class vector_VectorPayload : AllStatic {
1769 private:
1770 static int _payload_offset;
1771 public:
1772 static void set_payload(oop o, oop val);
1773
1774 static void compute_offsets();
1775 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1776
1777 // Testers
1778 static bool is_subclass(Klass* klass) {
1779 return klass->is_subclass_of(vmClasses::vector_VectorPayload_klass());
1780 }
1781 static bool is_instance(oop obj);
1782 };
1783
1784 class java_lang_Integer : AllStatic {
1785 public:
1786 static jint value(oop obj);
1787 };
1788
1789 class java_lang_Long : AllStatic {
1790 public:
1791 static jlong value(oop obj);
1792 };
1793
1794 class java_lang_Character : AllStatic {
1795 public:
1796 static jchar value(oop obj);
1797 };
1798
1799 class java_lang_Short : AllStatic {
1800 public:
1801 static jshort value(oop obj);
1802 };
1803
1804 class java_lang_Byte : AllStatic {
1805 public:
1806 static jbyte value(oop obj);
1807 };
1808
1809 class java_lang_Boolean : AllStatic {
1810 private:
1811 static int _static_TRUE_offset;
1812 static int _static_FALSE_offset;
1813 public:
1814 static Symbol* symbol();
1815 static void compute_offsets(InstanceKlass* k);
1816 static oop get_TRUE(InstanceKlass *k);
1817 static oop get_FALSE(InstanceKlass *k);
1818 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1819 static jboolean value(oop obj);
1820 };
1821
1822 class java_lang_Integer_IntegerCache : AllStatic {
1823 private:
1824 static int _static_cache_offset;
1825 public:
1826 static Symbol* symbol();
1827 static void compute_offsets(InstanceKlass* k);
1828 static objArrayOop cache(InstanceKlass *k);
1829 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1830 };
1831
1832 class java_lang_Long_LongCache : AllStatic {
1833 private:
1834 static int _static_cache_offset;
1835 public:
1836 static Symbol* symbol();
1837 static void compute_offsets(InstanceKlass* k);
1838 static objArrayOop cache(InstanceKlass *k);
1839 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1840 };
1841
1842 class java_lang_Character_CharacterCache : AllStatic {
1843 private:
1844 static int _static_cache_offset;
1845 public:
1846 static Symbol* symbol();
1847 static void compute_offsets(InstanceKlass* k);
1848 static objArrayOop cache(InstanceKlass *k);
1849 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1850 };
1851
1852 class java_lang_Short_ShortCache : AllStatic {
1853 private:
1854 static int _static_cache_offset;
1855 public:
1856 static Symbol* symbol();
1857 static void compute_offsets(InstanceKlass* k);
1858 static objArrayOop cache(InstanceKlass *k);
1859 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1860 };
1861
1862 class java_lang_Byte_ByteCache : AllStatic {
1863 private:
1864 static int _static_cache_offset;
1865 public:
1866 static Symbol* symbol();
1867 static void compute_offsets(InstanceKlass* k);
1868 static objArrayOop cache(InstanceKlass *k);
1869 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1870 };
1871
1872 // Interface to java.lang.InternalError objects
1873
1874 #define INTERNALERROR_INJECTED_FIELDS(macro) \
1875 macro(java_lang_InternalError, during_unsafe_access, bool_signature, false)
1876
1877 class java_lang_InternalError : AllStatic {
1878 private:
1879 static int _during_unsafe_access_offset;
1880 public:
1881 static jboolean during_unsafe_access(oop internal_error);
1882 static void set_during_unsafe_access(oop internal_error);
1883 static void compute_offsets();
1884 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1885 };
1886
1887 // Use to declare fields that need to be injected into Java classes
1888 // for the JVM to use. The name_index and signature_index are
1889 // declared in vmSymbols. The may_be_java flag is used to declare
1890 // fields that might already exist in Java but should be injected if
1891 // they don't. Otherwise the field is unconditionally injected and
1892 // the JVM uses the injected one. This is to ensure that name
1893 // collisions don't occur. In general may_be_java should be false
1894 // unless there's a good reason.
1895
1896 class InjectedField {
1897 public:
1898 const vmClassID klass_id;
1899 const vmSymbolID name_index;
1900 const vmSymbolID signature_index;
1901 const bool may_be_java;
1902
1903
1904 Klass* klass() const { return vmClasses::klass_at(klass_id); }
1905 Symbol* name() const { return lookup_symbol(name_index); }
1906 Symbol* signature() const { return lookup_symbol(signature_index); }
1907
1908 int compute_offset();
1909
1910 // Find the Symbol for this index
1911 static Symbol* lookup_symbol(vmSymbolID symbol_index) {
1912 return Symbol::vm_symbol_at(symbol_index);
1913 }
1914 };
1915
1916
1917 // Interface to hard-coded offset checking
1918
1919 enum class InjectedFieldID : int;
1920
1921 class JavaClasses : AllStatic {
1922 private:
1923
1924 static InjectedField _injected_fields[];
1925
1926 static bool check_offset(const char *klass_name, int offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1927 public:
1928
1929 static int compute_injected_offset(InjectedFieldID id);
1930
1931 static void compute_offsets();
1932 static void check_offsets() PRODUCT_RETURN;
1933 static void serialize_offsets(SerializeClosure* soc) NOT_CDS_RETURN;
1934 static InjectedField* get_injected(Symbol* class_name, int* field_count);
1935 static bool is_supported_for_archiving(oop obj) NOT_CDS_JAVA_HEAP_RETURN_(false);
1936
1937 static void compute_offset(int &dest_offset,
1938 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol,
1939 bool is_static = false);
1940 static void compute_offset(int& dest_offset, InstanceKlass* ik,
1941 const char* name_string, Symbol* signature_symbol,
1942 bool is_static = false);
1943 };
1944
1945 #undef CHECK_INIT
1946
1947 #endif // SHARE_CLASSFILE_JAVACLASSES_HPP