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