1 /*
2 * Copyright (c) 1997, 2026, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_CLASSFILE_JAVACLASSES_HPP
26 #define SHARE_CLASSFILE_JAVACLASSES_HPP
27
28 #include "classfile/vmClasses.hpp"
29 #include "oops/instanceKlass.hpp"
30 #include "oops/oopsHierarchy.hpp"
31 #include "oops/symbol.hpp"
32 #include "runtime/handles.hpp"
33 #include "runtime/os.hpp"
34 #include "utilities/macros.hpp"
35 #include "utilities/utf8.hpp"
36 #include "utilities/vmEnums.hpp"
37
38 class JvmtiThreadState;
39 class RecordComponent;
40 class SerializeClosure;
41 class ObjectWaiter;
42 class ObjectMonitor;
43
44 #define CHECK_INIT(offset) assert(offset != 0, "should be initialized"); return offset;
45
46 // Interface to java.lang.Object objects
47
48 class java_lang_Object : AllStatic {
49 public:
50 static void register_natives(TRAPS);
51 };
52
53 // Interface to java.lang.String objects
54
55 // The flags field is a collection of bits representing boolean values used
56 // internally by the VM.
57 #define STRING_INJECTED_FIELDS(macro) \
58 macro(java_lang_String, flags, byte_signature, false)
59
60 class java_lang_String : AllStatic {
61 private:
62 static int _value_offset;
63 static int _hash_offset;
64 static int _hashIsZero_offset;
65 static int _coder_offset;
66 static int _flags_offset;
67
68 static bool _initialized;
69
70 static Handle basic_create(int length, bool byte_arr, TRAPS);
71
72 static inline void set_coder(oop string, jbyte coder);
73
74 // Bitmasks for values in the injected flags field.
75 static const uint8_t _deduplication_forbidden_mask = 1 << 0;
76 static const uint8_t _deduplication_requested_mask = 1 << 1;
77
78 static int flags_offset() { CHECK_INIT(_flags_offset); }
79 // Return the address of the injected flags field.
80 static inline uint8_t* flags_addr(oop java_string);
81 // Test whether the designated bit of the injected flags field is set.
82 static inline bool is_flag_set(oop java_string, uint8_t flag_mask);
83 // Atomically test and set the designated bit of the injected flags field,
84 // returning true if the bit was already set.
85 static bool test_and_set_flag(oop java_string, uint8_t flag_mask);
86
87 static inline unsigned int hash_code_impl(oop java_string, bool update);
88
89 public:
90
91 // Coders
92 enum Coder {
93 CODER_LATIN1 = 0,
94 CODER_UTF16 = 1
95 };
96
97 static void compute_offsets();
98 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
99
100 // Instance creation
101 static Handle create_from_unicode(const jchar* unicode, int len, TRAPS);
102 static oop create_oop_from_unicode(const jchar* unicode, int len, TRAPS);
103 static Handle create_from_str(const char* utf8_str, TRAPS);
104 static oop create_oop_from_str(const char* utf8_str, TRAPS);
105 static Handle create_from_symbol(const Symbol* symbol, TRAPS);
106 static Handle create_from_platform_dependent_str(const char* str, TRAPS);
107
108 static void set_compact_strings(bool value);
109
110 static int value_offset() { CHECK_INIT(_value_offset); }
111 static int coder_offset() { CHECK_INIT(_coder_offset); }
112
113 static inline void set_value(oop string, typeArrayOop buffer);
114
115 // Set the deduplication_forbidden flag true. This flag is sticky; once
116 // set it never gets cleared. This is set when a String is interned in
117 // the StringTable, to prevent string deduplication from changing the
118 // String's value array.
119 static inline void set_deduplication_forbidden(oop java_string);
120
121 // Test and set the deduplication_requested flag. Returns the old value
122 // of the flag. This flag is sticky; once set it never gets cleared.
123 // Some GCs may use this flag when deciding whether to request
124 // deduplication of a String, to avoid multiple requests for the same
125 // object.
126 static inline bool test_and_set_deduplication_requested(oop java_string);
127
128 // Accessors
129 static inline typeArrayOop value(oop java_string);
130 static inline typeArrayOop value_no_keepalive(oop java_string);
131 static inline bool hash_is_set(oop string);
132 static inline bool is_latin1(oop java_string);
133 static inline bool deduplication_forbidden(oop java_string);
134 static inline bool deduplication_requested(oop java_string);
135 static inline int length(oop java_string);
136 static inline int length(oop java_string, typeArrayOop string_value);
137 static size_t utf8_length(oop java_string);
138 static size_t utf8_length(oop java_string, typeArrayOop string_value);
139 // Legacy variants that truncate the length if needed
140 static int utf8_length_as_int(oop java_string);
141 static int utf8_length_as_int(oop java_string, typeArrayOop string_value);
142
143 // String converters
144 static char* as_utf8_string(oop java_string);
145 // `length` is set to the length of the utf8 sequence.
146 static char* as_utf8_string(oop java_string, size_t& length);
147 static char* as_utf8_string_full(oop java_string, char* buf, size_t buflen, size_t& length);
148 static char* as_utf8_string(oop java_string, char* buf, size_t buflen);
149 static char* as_utf8_string(oop java_string, int start, int len);
150 static char* as_utf8_string(oop java_string, typeArrayOop value, char* buf, size_t buflen);
151 static char* as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, size_t buflen);
152 static char* as_platform_dependent_str(Handle java_string, TRAPS);
153 static jchar* as_unicode_string(oop java_string, int& length, TRAPS);
154 static jchar* as_unicode_string_or_null(oop java_string, int& length);
155 // produce an ascii string with all other values quoted using \u####
156 static char* as_quoted_ascii(oop java_string);
157
158 // Compute the hash value for a java.lang.String object which would
159 // contain the characters passed in.
160 //
161 // As the hash value used by the String object itself, in
162 // String.hashCode(). This value is normally calculated in Java code
163 // in the String.hashCode method(), but is precomputed for String
164 // objects in the shared archive file.
165 // hash P(31) from Kernighan & Ritchie
166 //
167 // For this reason, THIS ALGORITHM MUST MATCH String.hashCode().
168 static unsigned int hash_code(const jchar* s, int len) {
169 unsigned int h = 0;
170 while (len-- > 0) {
171 h = 31*h + (unsigned int) *s;
172 s++;
173 }
174 return h;
175 }
176
177 static unsigned int hash_code(const jbyte* s, int len) {
178 unsigned int h = 0;
179 while (len-- > 0) {
180 h = 31*h + (((unsigned int) *s) & 0xFF);
181 s++;
182 }
183 return h;
184 }
185
186 static unsigned int hash_code(const char* utf8_str, size_t utf8_len) {
187 unsigned int h = 0;
188 int unicode_length = UTF8::unicode_length(utf8_str, utf8_len);
189
190 jchar c;
191 while (unicode_length-- > 0) {
192 utf8_str = UTF8::next(utf8_str, &c);
193 h = 31 * h + ((unsigned int)c);
194 }
195 return h;
196 }
197
198 static unsigned int hash_code(oop java_string);
199 static unsigned int hash_code_noupdate(oop java_string);
200
201 // Compare strings (of different types/encodings), length is the string (array) length
202 static bool equals(oop java_string, const jchar* chars, int len);
203 static bool equals(oop java_string, const char* utf8_str, size_t utf8_len);
204 static bool equals(oop str1, oop str2);
205 static inline bool value_equals(typeArrayOop str_value1, typeArrayOop str_value2);
206
207 // Conversion between '.' and '/' formats, and allocate a String from the result.
208 static Handle externalize_classname(Symbol* java_name, TRAPS);
209
210 // Conversion
211 static Symbol* as_symbol(oop java_string);
212 static Symbol* as_symbol_or_null(oop java_string);
213
214 // Tester
215 static inline bool is_instance(oop obj);
216
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 friend class HeapShared;
238
239 private:
240
241 // The fake offsets are added by the class loader when java.lang.Class is loaded
242
243 static int _klass_offset;
244 static int _array_klass_offset;
245
246 static int _oop_size_offset;
247 static int _static_oop_field_count_offset;
248
249 static int _protection_domain_offset;
250 static int _init_lock_offset;
251 static int _signers_offset;
252 static int _class_loader_offset;
253 static int _module_offset;
254 static int _component_mirror_offset;
255 static int _name_offset;
256 static int _source_file_offset;
257 static int _classData_offset;
258 static int _classRedefinedCount_offset;
259 static int _reflectionData_offset;
260 static int _modifiers_offset;
261 static int _is_primitive_offset;
262 static int _raw_access_flags_offset;
263
264 static bool _offsets_computed;
265
266 static GrowableArray<Klass*>* _fixup_mirror_list;
267 static GrowableArray<Klass*>* _fixup_module_field_list;
268
269 static void set_init_lock(oop java_class, oop init_lock);
270 static void set_protection_domain(oop java_class, oop protection_domain);
271 static void set_class_loader(oop java_class, oop class_loader);
272 static void set_component_mirror(oop java_class, oop comp_mirror);
273 static void initialize_mirror_fields(InstanceKlass* ik, Handle mirror, Handle protection_domain,
274 Handle classData, TRAPS);
275 static void set_mirror_module_field(JavaThread* current, Klass* K, Handle mirror, Handle module);
276
277 static void set_modifiers(oop java_class, u2 value);
278 static void set_raw_access_flags(oop java_class, u2 value);
279 static void set_is_primitive(oop java_class);
280 static void release_set_array_klass(oop java_class, Klass* klass);
281
282 public:
283 static void allocate_fixup_lists();
284 static void compute_offsets();
285
286 // Instance creation
287 static void allocate_mirror(Klass* k, bool is_scratch, Handle protection_domain, Handle classData,
288 Handle& mirror, Handle& comp_mirror, TRAPS); // returns mirror and comp_mirror
289 static void create_mirror(Klass* k, Handle class_loader, Handle module,
290 Handle protection_domain, Handle classData, TRAPS);
291 static void fixup_mirror(Klass* k, TRAPS);
292 static oop create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS);
293
294 // Archiving
295 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
296 static void create_scratch_mirror(Klass* k, TRAPS) NOT_CDS_JAVA_HEAP_RETURN;
297 static bool restore_archived_mirror(Klass *k, Handle class_loader, Handle module,
298 Handle protection_domain,
299 TRAPS) NOT_CDS_JAVA_HEAP_RETURN_(false);
300
301 static void fixup_module_field(Klass* k, Handle module);
302
303 // Conversion -- java_class must not be null. The return value is null only if java_class is a primitive type.
304 static Klass* as_Klass(oop java_class);
305 static InstanceKlass* as_InstanceKlass(oop java_class);
306
307 static void set_klass(oop java_class, Klass* klass);
308 static BasicType as_BasicType(oop java_class, Klass** reference_klass = nullptr);
309 static Symbol* as_signature(oop java_class, bool intern_if_not_found);
310 static void print_signature(oop java_class, outputStream *st);
311 static const char* as_external_name(oop java_class);
312 // Testing
313 static bool is_instance(oop obj);
314
315 static bool is_primitive(oop java_class);
316 static BasicType primitive_type(oop java_class);
317 static oop primitive_mirror(BasicType t);
318 static Klass* array_klass_acquire(oop java_class);
319
320 // compiler support for class operations
321 static int klass_offset() { CHECK_INIT(_klass_offset); }
322 static int array_klass_offset() { CHECK_INIT(_array_klass_offset); }
323 // Support for classRedefinedCount field
324 static int classRedefinedCount(oop the_class_mirror);
325 static void set_classRedefinedCount(oop the_class_mirror, int value);
326
327 // Support for embedded per-class oops
328 static oop protection_domain(oop java_class);
329 static oop init_lock(oop java_class);
330 static void clear_init_lock(oop java_class) {
331 set_init_lock(java_class, nullptr);
332 }
333 static oop component_mirror(oop java_class);
334 static int component_mirror_offset() { return _component_mirror_offset; }
335 static objArrayOop signers(oop java_class);
336 static oop class_data(oop java_class);
337 static void set_class_data(oop java_class, oop classData);
338
339 static oop reflection_data(oop java_class);
340 static void set_reflection_data(oop java_class, oop reflection_data);
341 static bool has_reflection_data(oop java_class);
342 static int reflection_data_offset() { return _reflectionData_offset; }
343
344 static oop class_loader(oop java_class);
345 static void set_module(oop java_class, oop module);
346 static oop module(oop java_class);
347
348 static oop name(Handle java_class, TRAPS);
349
350 static oop source_file(oop java_class);
351 static void set_source_file(oop java_class, oop source_file);
352
353 static int modifiers(oop java_class);
354
355 static size_t oop_size(oop java_class);
356 static void set_oop_size(HeapWord* java_class, size_t size);
357 static int static_oop_field_count(oop java_class);
358 static void set_static_oop_field_count(oop java_class, int size);
359
360 static GrowableArray<Klass*>* fixup_mirror_list() {
361 return _fixup_mirror_list;
362 }
363 static void set_fixup_mirror_list(GrowableArray<Klass*>* v) {
364 _fixup_mirror_list = v;
365 }
366
367 static GrowableArray<Klass*>* fixup_module_field_list() {
368 return _fixup_module_field_list;
369 }
370 static void set_fixup_module_field_list(GrowableArray<Klass*>* v) {
371 _fixup_module_field_list = v;
372 }
373
374 // Debugging
375 friend class JavaClasses;
376 };
377
378 // Interface to java.lang.Thread objects
379
380 #define THREAD_INJECTED_FIELDS(macro) \
381 macro(java_lang_Thread, jvmti_thread_state, intptr_signature, false) \
382 macro(java_lang_Thread, vthread_transition_disable_count, int_signature, false) \
383 macro(java_lang_Thread, is_in_vthread_transition, bool_signature, false) \
384 JFR_ONLY(macro(java_lang_Thread, jfr_epoch, short_signature, false))
385
386 class java_lang_Thread : AllStatic {
387 friend class java_lang_VirtualThread;
388 friend class JVMCIVMStructs;
389 private:
390 // Note that for this class the layout changed between JDK1.2 and JDK1.3,
391 // so we compute the offsets at startup rather than hard-wiring them.
392 static int _holder_offset;
393 static int _name_offset;
394 static int _contextClassLoader_offset;
395 static int _eetop_offset;
396 static int _jvmti_thread_state_offset;
397 static int _vthread_transition_disable_count_offset;
398 static int _is_in_vthread_transition_offset;
399 static int _interrupted_offset;
400 static int _interruptLock_offset;
401 static int _tid_offset;
402 static int _continuation_offset;
403 static int _park_blocker_offset;
404 static int _scopedValueBindings_offset;
405 JFR_ONLY(static int _jfr_epoch_offset;)
406
407 static void compute_offsets();
408
409 public:
410 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
411
412 // Returns the JavaThread associated with the thread obj
413 static JavaThread* thread(oop java_thread);
414 static JavaThread* thread_acquire(oop java_thread);
415 // Set JavaThread for instance
416 static void set_thread(oop java_thread, JavaThread* thread);
417 static void release_set_thread(oop java_thread, JavaThread* thread);
418 // FieldHolder
419 static oop holder(oop java_thread);
420 // interruptLock
421 static oop interrupt_lock(oop java_thread);
422 // Interrupted status
423 static bool interrupted(oop java_thread);
424 static void set_interrupted(oop java_thread, bool val);
425 // Name
426 static oop name(oop java_thread);
427 static void set_name(oop java_thread, oop name);
428 // Priority
429 static ThreadPriority priority(oop java_thread);
430 static void set_priority(oop java_thread, ThreadPriority priority);
431 // Thread group
432 static oop threadGroup(oop java_thread);
433 // Alive (NOTE: this is not really a field, but provides the correct
434 // definition without doing a Java call)
435 static bool is_alive(oop java_thread);
436 // Daemon
437 static bool is_daemon(oop java_thread);
438 static void set_daemon(oop java_thread);
439 // Context ClassLoader
440 static oop context_class_loader(oop java_thread);
441 // Stack size hint
442 static jlong stackSize(oop java_thread);
443 // Thread ID
444 static int64_t thread_id(oop java_thread);
445 static ByteSize thread_id_offset();
446 // Continuation
447 static inline oop continuation(oop java_thread);
448
449 static JvmtiThreadState* jvmti_thread_state(oop java_thread);
450 static void set_jvmti_thread_state(oop java_thread, JvmtiThreadState* state);
451
452 static int vthread_transition_disable_count(oop java_thread);
453 static void inc_vthread_transition_disable_count(oop java_thread);
454 static void dec_vthread_transition_disable_count(oop java_thread);
455 static int vthread_transition_disable_count_offset() { return _vthread_transition_disable_count_offset; }
456
457 static bool is_in_vthread_transition(oop java_thread);
458 static void set_is_in_vthread_transition(oop java_thread, bool val);
459 static int is_in_vthread_transition_offset() { return _is_in_vthread_transition_offset; }
460
461 // Clear all scoped value bindings on error
462 static void clear_scopedValueBindings(oop java_thread);
463
464 // Blocker object responsible for thread parking
465 static oop park_blocker(oop java_thread);
466
467 // Write thread status info to threadStatus field of java.lang.Thread.
468 static void set_thread_status(oop java_thread_oop, JavaThreadStatus status);
469 // Read thread status info from threadStatus field of java.lang.Thread.
470 static JavaThreadStatus get_thread_status(oop java_thread_oop);
471
472 static const char* thread_status_name(oop java_thread_oop);
473
474 // Fill in current stack trace, can cause GC
475 static oop async_get_stack_trace(jobject jthread, TRAPS);
476
477 JFR_ONLY(static u2 jfr_epoch(oop java_thread);)
478 JFR_ONLY(static void set_jfr_epoch(oop java_thread, u2 epoch);)
479 JFR_ONLY(static int jfr_epoch_offset() { CHECK_INIT(_jfr_epoch_offset); })
480
481 // Debugging
482 friend class JavaClasses;
483 };
484
485 // Interface to java.lang.Thread$FieldHolder objects
486
487 class java_lang_Thread_FieldHolder : AllStatic {
488 private:
489 static int _group_offset;
490 static int _priority_offset;
491 static int _stackSize_offset;
492 static int _daemon_offset;
493 static int _thread_status_offset;
494
495 static void compute_offsets();
496
497 public:
498 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
499
500 static oop threadGroup(oop holder);
501
502 static ThreadPriority priority(oop holder);
503 static void set_priority(oop holder, ThreadPriority priority);
504
505 static jlong stackSize(oop holder);
506
507 static bool is_daemon(oop holder);
508 static void set_daemon(oop holder, bool val);
509
510 static void set_thread_status(oop holder, JavaThreadStatus status);
511 static JavaThreadStatus get_thread_status(oop holder);
512
513 friend class JavaClasses;
514 };
515
516 // Interface to java.lang.Thread$Constants objects
517
518 class java_lang_Thread_Constants : AllStatic {
519 private:
520 static int _static_VTHREAD_GROUP_offset;
521 static int _static_NOT_SUPPORTED_CLASSLOADER_offset;
522
523 static void compute_offsets();
524 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
525
526 public:
527 static oop get_VTHREAD_GROUP();
528
529 friend class JavaClasses;
530 };
531
532 // Interface to java.lang.ThreadGroup objects
533
534 class java_lang_ThreadGroup : AllStatic {
535 private:
536 static int _parent_offset;
537 static int _name_offset;
538 static int _maxPriority_offset;
539 static int _daemon_offset;
540
541 static void compute_offsets();
542 public:
543 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
544
545 // parent ThreadGroup
546 static oop parent(oop java_thread_group);
547 // name
548 static const char* name(oop java_thread_group);
549 // maxPriority in group
550 static ThreadPriority maxPriority(oop java_thread_group);
551 // Daemon
552 static bool is_daemon(oop java_thread_group);
553
554 // Debugging
555 friend class JavaClasses;
556 };
557
558
559 // Interface to java.lang.VirtualThread objects
560 #define VTHREAD_INJECTED_FIELDS(macro) \
561 macro(java_lang_VirtualThread, objectWaiter, intptr_signature, false)
562
563 class java_lang_VirtualThread : AllStatic {
564 private:
565 static int static_vthread_scope_offset;
566 static int _carrierThread_offset;
567 static int _continuation_offset;
568 static int _state_offset;
569 static int _next_offset;
570 static int _onWaitingList_offset;
571 static int _notified_offset;
572 static int _interruptible_wait_offset;
573 static int _recheckInterval_offset;
574 static int _timeout_offset;
575 static int _objectWaiter_offset;
576 JFR_ONLY(static int _jfr_epoch_offset;)
577 public:
578 enum {
579 NEW = 0,
580 STARTED = 1,
581 RUNNING = 2,
582 PARKING = 3,
583 PARKED = 4,
584 PINNED = 5,
585 TIMED_PARKING = 6,
586 TIMED_PARKED = 7,
587 TIMED_PINNED = 8,
588 UNPARKED = 9,
589 YIELDING = 10,
590 YIELDED = 11,
591 BLOCKING = 12,
592 BLOCKED = 13,
593 UNBLOCKED = 14,
594 WAITING = 15,
595 WAIT = 16, // waiting in Object.wait
596 TIMED_WAITING = 17,
597 TIMED_WAIT = 18, // waiting in timed-Object.wait
598 TERMINATED = 99,
599
600 // additional state bits
601 SUSPENDED = 1 << 8, // suspended when unmounted
602 };
603
604 static void compute_offsets();
605 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
606
607 // Testers
608 static bool is_subclass(Klass* klass) {
609 return klass->is_subclass_of(vmClasses::VirtualThread_klass());
610 }
611 static bool is_instance(oop obj);
612
613 static oop vthread_scope();
614 static oop carrier_thread(oop vthread);
615 static oop continuation(oop vthread);
616 static int state(oop vthread);
617 static void set_state(oop vthread, int state);
618 static int cmpxchg_state(oop vthread, int old_state, int new_state);
619 static oop next(oop vthread);
620 static void set_next(oop vthread, oop next_vthread);
621 static bool set_onWaitingList(oop vthread, OopHandle& list_head);
622 static jlong timeout(oop vthread);
623 static void set_timeout(oop vthread, jlong value);
624 static void set_notified(oop vthread, jboolean value);
625 static void set_interruptible_wait(oop vthread, jboolean value);
626 static bool is_preempted(oop vthread);
627 static JavaThreadStatus map_state_to_thread_status(int state);
628
629 static inline ObjectWaiter* objectWaiter(oop vthread);
630 static inline void set_objectWaiter(oop vthread, ObjectWaiter* waiter);
631 static ObjectMonitor* current_pending_monitor(oop vthread);
632 static ObjectMonitor* current_waiting_monitor(oop vthread);
633 };
634
635
636 // Interface to java.lang.Throwable objects
637
638 class java_lang_Throwable: AllStatic {
639 friend class BacktraceBuilder;
640 friend class BacktraceIterator;
641
642 private:
643 // Trace constants
644 enum {
645 trace_methods_offset = 0,
646 trace_bcis_offset = 1,
647 trace_mirrors_offset = 2,
648 trace_names_offset = 3,
649 trace_conts_offset = 4,
650 trace_next_offset = 5,
651 trace_hidden_offset = 6,
652 trace_size = 7,
653 trace_chunk_size = 32
654 };
655
656 static int _backtrace_offset;
657 static int _detailMessage_offset;
658 static int _stackTrace_offset;
659 static int _depth_offset;
660 static int _cause_offset;
661 static int _static_unassigned_stacktrace_offset;
662
663 // StackTrace (programmatic access, new since 1.4)
664 static void clear_stacktrace(oop throwable);
665 // Stacktrace (post JDK 1.7.0 to allow immutability protocol to be followed)
666 static void set_stacktrace(oop throwable, oop st_element_array);
667 static oop unassigned_stacktrace();
668
669 public:
670 // Backtrace
671 static oop backtrace(oop throwable);
672 static void set_backtrace(oop throwable, oop value);
673 static int depth(oop throwable);
674 static void set_depth(oop throwable, int value);
675 // Message
676 static int get_detailMessage_offset() { CHECK_INIT(_detailMessage_offset); }
677 static oop message(oop throwable);
678 static const char* message_as_utf8(oop throwable);
679 static void set_message(oop throwable, oop value);
680
681 static oop cause(oop throwable);
682
683 static void print_stack_element(outputStream *st, Method* method, int bci);
684
685 static void compute_offsets();
686 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
687
688 // Allocate space for backtrace (created but stack trace not filled in)
689 static void allocate_backtrace(Handle throwable, TRAPS);
690 // Fill in current stack trace for throwable with preallocated backtrace (no GC)
691 static void fill_in_stack_trace_of_preallocated_backtrace(Handle throwable);
692 // Fill in current stack trace, can cause GC
693 static void fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS);
694 static void fill_in_stack_trace(Handle throwable, const methodHandle& method = methodHandle());
695
696 // Programmatic access to stack trace
697 static void get_stack_trace_elements(int depth, Handle backtrace, objArrayHandle stack_trace, TRAPS);
698
699 // For recreating class initialization error exceptions.
700 static Handle create_initialization_error(JavaThread* current, Handle throwable);
701
702 static oop create_exception_instance(Symbol* class_name, TRAPS);
703
704 // Printing
705 static void print(oop throwable, outputStream* st);
706 static void print_stack_trace(Handle throwable, outputStream* st);
707 static void java_printStackTrace(Handle throwable, TRAPS);
708 // Debugging
709 friend class JavaClasses;
710 // Gets the method and bci of the top frame (TOS). Returns false if this failed.
711 static bool get_top_method_and_bci(oop throwable, Method** method, int* bci);
712 };
713
714
715 // Interface to java.lang.reflect.AccessibleObject objects
716
717 class java_lang_reflect_AccessibleObject: AllStatic {
718 private:
719 // Note that to reduce dependencies on the JDK we compute these
720 // offsets at run-time.
721 static int _override_offset;
722
723 static void compute_offsets();
724
725 public:
726 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
727
728 // Accessors
729 static jboolean override(oop reflect);
730 static void set_override(oop reflect, jboolean value);
731
732 // Debugging
733 friend class JavaClasses;
734 };
735
736
737 // Interface to java.lang.reflect.Method objects
738
739 class java_lang_reflect_Method : public java_lang_reflect_AccessibleObject {
740 private:
741 // Note that to reduce dependencies on the JDK we compute these
742 // offsets at run-time.
743 static int _clazz_offset;
744 static int _name_offset;
745 static int _returnType_offset;
746 static int _parameterTypes_offset;
747 static int _exceptionTypes_offset;
748 static int _slot_offset;
749 static int _modifiers_offset;
750 static int _signature_offset;
751 static int _annotations_offset;
752 static int _parameter_annotations_offset;
753 static int _annotation_default_offset;
754
755 static void compute_offsets();
756 public:
757 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
758
759 // Allocation
760 static Handle create(TRAPS);
761
762 // Accessors
763 static oop clazz(oop reflect);
764 static void set_clazz(oop reflect, oop value);
765
766 static void set_name(oop method, oop value);
767
768 static oop return_type(oop method);
769 static void set_return_type(oop method, oop value);
770
771 static oop parameter_types(oop method);
772 static void set_parameter_types(oop method, oop value);
773
774 static int slot(oop reflect);
775 static void set_slot(oop reflect, int value);
776
777 static void set_exception_types(oop method, oop value);
778 static void set_modifiers(oop method, int value);
779 static void set_signature(oop method, oop value);
780 static void set_annotations(oop method, oop value);
781 static void set_parameter_annotations(oop method, oop value);
782 static void set_annotation_default(oop method, oop value);
783
784 // Debugging
785 friend class JavaClasses;
786 };
787
788
789 // Interface to java.lang.reflect.Constructor objects
790
791 class java_lang_reflect_Constructor : public java_lang_reflect_AccessibleObject {
792 private:
793 // Note that to reduce dependencies on the JDK we compute these
794 // offsets at run-time.
795 static int _clazz_offset;
796 static int _parameterTypes_offset;
797 static int _exceptionTypes_offset;
798 static int _slot_offset;
799 static int _modifiers_offset;
800 static int _signature_offset;
801 static int _annotations_offset;
802 static int _parameter_annotations_offset;
803
804 static void compute_offsets();
805 public:
806 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
807
808 // Allocation
809 static Handle create(TRAPS);
810
811 // Accessors
812 static oop clazz(oop reflect);
813 static void set_clazz(oop reflect, oop value);
814
815 static oop parameter_types(oop constructor);
816 static void set_parameter_types(oop constructor, oop value);
817
818 static int slot(oop reflect);
819 static void set_slot(oop reflect, int value);
820
821 static void set_exception_types(oop constructor, oop value);
822 static void set_modifiers(oop constructor, int value);
823 static void set_signature(oop constructor, oop value);
824 static void set_annotations(oop constructor, oop value);
825 static void set_parameter_annotations(oop method, oop value);
826
827 // Debugging
828 friend class JavaClasses;
829 };
830
831
832 // Interface to java.lang.reflect.Field objects
833
834 class java_lang_reflect_Field : public java_lang_reflect_AccessibleObject {
835 private:
836 // Note that to reduce dependencies on the JDK we compute these
837 // offsets at run-time.
838 static int _clazz_offset;
839 static int _name_offset;
840 static int _type_offset;
841 static int _slot_offset;
842 static int _modifiers_offset;
843 static int _trusted_final_offset;
844 static int _signature_offset;
845 static int _annotations_offset;
846
847 static void compute_offsets();
848
849 public:
850 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
851
852 // Allocation
853 static Handle create(TRAPS);
854
855 // Accessors
856 static oop clazz(oop reflect);
857 static void set_clazz(oop reflect, oop value);
858
859 static oop name(oop field);
860 static void set_name(oop field, oop value);
861
862 static oop type(oop field);
863 static void set_type(oop field, oop value);
864
865 static int slot(oop reflect);
866 static void set_slot(oop reflect, int value);
867
868 static int modifiers(oop field);
869 static void set_modifiers(oop field, int value);
870
871 static void set_trusted_final(oop field);
872
873 static void set_signature(oop constructor, oop value);
874 static void set_annotations(oop constructor, oop value);
875
876 // Debugging
877 friend class JavaClasses;
878 };
879
880 class java_lang_reflect_Parameter {
881 private:
882 // Note that to reduce dependencies on the JDK we compute these
883 // offsets at run-time.
884 static int _name_offset;
885 static int _modifiers_offset;
886 static int _index_offset;
887 static int _executable_offset;
888
889 static void compute_offsets();
890
891 public:
892 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
893
894 // Allocation
895 static Handle create(TRAPS);
896
897 // Accessors
898 static oop name(oop field);
899 static void set_name(oop field, oop value);
900
901 static int index(oop reflect);
902 static void set_index(oop reflect, int value);
903
904 static int modifiers(oop reflect);
905 static void set_modifiers(oop reflect, int value);
906
907 static oop executable(oop constructor);
908 static void set_executable(oop constructor, oop value);
909
910 friend class JavaClasses;
911 };
912
913 #define MODULE_INJECTED_FIELDS(macro) \
914 macro(java_lang_Module, module_entry, intptr_signature, false)
915
916 class java_lang_Module {
917 private:
918 static int _loader_offset;
919 static int _name_offset;
920 static int _module_entry_offset;
921
922 static void compute_offsets();
923
924 public:
925 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
926
927 // Allocation
928 static Handle create(Handle loader, Handle module_name, TRAPS);
929
930 // Testers
931 static bool is_instance(oop obj);
932
933 // Accessors
934 static oop loader(oop module);
935 static void set_loader(oop module, oop value);
936
937 // CDS
938 static int module_entry_offset() { return _module_entry_offset; }
939
940 static oop name(oop module);
941 static void set_name(oop module, oop value);
942
943 static ModuleEntry* module_entry(oop module);
944 static ModuleEntry* module_entry_raw(oop module);
945 static void set_module_entry(oop module, ModuleEntry* module_entry);
946
947 friend class JavaClasses;
948 };
949
950 #define CONSTANTPOOL_INJECTED_FIELDS(macro) \
951 macro(reflect_ConstantPool, vmholder, object_signature, false)
952
953 // Interface to jdk.internal.reflect.ConstantPool objects
954 class reflect_ConstantPool {
955 private:
956 // Note that to reduce dependencies on the JDK we compute these
957 // offsets at run-time. This field is the oop offset for the
958 // actual constant pool, previously called constantPoolOop.
959 static int _vmholder_offset;
960
961 static void compute_offsets();
962
963 public:
964 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
965
966 // Allocation
967 static Handle create(TRAPS);
968
969 // Accessors
970 static void set_cp(oop reflect, ConstantPool* value);
971
972 static ConstantPool* get_cp(oop reflect);
973
974 // Debugging
975 friend class JavaClasses;
976 };
977
978
979 // Interface to java.lang primitive type boxing objects:
980 // - java.lang.Boolean
981 // - java.lang.Character
982 // - java.lang.Float
983 // - java.lang.Double
984 // - java.lang.Byte
985 // - java.lang.Short
986 // - java.lang.Integer
987 // - java.lang.Long
988
989 // This could be separated out into 8 individual classes.
990
991 class java_lang_boxing_object: AllStatic {
992 private:
993 static int _value_offset;
994 static int _long_value_offset;
995
996 static void compute_offsets();
997 static oop initialize_and_allocate(BasicType type, TRAPS);
998 public:
999 // Allocation. Returns a boxed value, or null for invalid type.
1000 static oop create(BasicType type, jvalue* value, TRAPS);
1001 // Accessors. Returns the basic type being boxed, or T_ILLEGAL for invalid oop.
1002 static BasicType get_value(oop box, jvalue* value);
1003 static BasicType set_value(oop box, jvalue* value);
1004 static BasicType basic_type(oop box);
1005 static bool is_instance(oop box) { return basic_type(box) != T_ILLEGAL; }
1006 static bool is_instance(oop box, BasicType type) { return basic_type(box) == type; }
1007 static void print(oop box, outputStream* st) { jvalue value; print(get_value(box, &value), &value, st); }
1008 static void print(BasicType type, jvalue* value, outputStream* st);
1009
1010 static int value_offset(BasicType type) {
1011 return is_double_word_type(type) ? _long_value_offset : _value_offset;
1012 }
1013
1014 static void serialize_offsets(SerializeClosure* f);
1015
1016 // Debugging
1017 friend class JavaClasses;
1018 };
1019
1020
1021
1022 // Interface to java.lang.ref.Reference objects
1023
1024 class java_lang_ref_Reference: AllStatic {
1025 static int _referent_offset;
1026 static int _queue_offset;
1027 static int _next_offset;
1028 static int _discovered_offset;
1029
1030 static bool _offsets_initialized;
1031
1032 public:
1033 // Accessors
1034 static inline oop weak_referent_no_keepalive(oop ref);
1035 static inline oop weak_referent(oop ref);
1036 static inline oop phantom_referent_no_keepalive(oop ref);
1037 static inline oop unknown_referent_no_keepalive(oop ref);
1038 static inline void clear_referent(oop ref);
1039 static inline void clear_referent_raw(oop ref);
1040 static inline HeapWord* referent_addr_raw(oop ref);
1041 static inline oop next(oop ref);
1042 static inline void set_next(oop ref, oop value);
1043 static inline void set_next_raw(oop ref, oop value);
1044 static inline HeapWord* next_addr_raw(oop ref);
1045 static inline oop discovered(oop ref);
1046 static inline void set_discovered(oop ref, oop value);
1047 static inline void set_discovered_raw(oop ref, oop value);
1048 static inline HeapWord* discovered_addr_raw(oop ref);
1049 static bool is_referent_field(oop obj, ptrdiff_t offset);
1050 static inline bool is_final(oop ref);
1051 static inline bool is_phantom(oop ref);
1052 static inline bool is_weak(oop ref);
1053 static inline bool is_soft(oop ref);
1054
1055 static int referent_offset() { CHECK_INIT(_referent_offset); }
1056 static int queue_offset() { CHECK_INIT(_queue_offset); }
1057 static int next_offset() { CHECK_INIT(_next_offset); }
1058 static int discovered_offset() { CHECK_INIT(_discovered_offset); }
1059
1060 static void compute_offsets();
1061 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1062 };
1063
1064
1065 // Interface to java.lang.ref.SoftReference objects
1066
1067 class java_lang_ref_SoftReference: public java_lang_ref_Reference {
1068 static int _timestamp_offset;
1069 static int _static_clock_offset;
1070
1071 public:
1072 // Accessors
1073 static jlong timestamp(oop ref);
1074
1075 // Accessors for statics
1076 static jlong clock();
1077 static void set_clock(jlong value);
1078
1079 static void compute_offsets();
1080 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1081 };
1082
1083 // Interface to java.lang.invoke.MethodHandle objects
1084
1085 class java_lang_invoke_MethodHandle: AllStatic {
1086 friend class JavaClasses;
1087
1088 private:
1089 static int _type_offset; // the MethodType of this MH
1090 static int _form_offset; // the LambdaForm of this MH
1091
1092 static void compute_offsets();
1093
1094 public:
1095 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1096
1097 // Accessors
1098 static oop type(oop mh);
1099 static void set_type(oop mh, oop mtype);
1100
1101 static oop form(oop mh);
1102 static void set_form(oop mh, oop lform);
1103
1104 // Testers
1105 static bool is_subclass(Klass* klass) {
1106 return klass->is_subclass_of(vmClasses::MethodHandle_klass());
1107 }
1108 static bool is_instance(oop obj);
1109
1110 // Accessors for code generation:
1111 static int type_offset() { CHECK_INIT(_type_offset); }
1112 static int form_offset() { CHECK_INIT(_form_offset); }
1113 };
1114
1115 // Interface to java.lang.invoke.DirectMethodHandle objects
1116
1117 class java_lang_invoke_DirectMethodHandle: AllStatic {
1118 friend class JavaClasses;
1119
1120 private:
1121 static int _member_offset; // the MemberName of this DMH
1122
1123 static void compute_offsets();
1124
1125 public:
1126 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1127
1128 // Accessors
1129 static oop member(oop mh);
1130
1131 // Testers
1132 static bool is_subclass(Klass* klass) {
1133 return klass->is_subclass_of(vmClasses::DirectMethodHandle_klass());
1134 }
1135 static bool is_instance(oop obj);
1136
1137 // Accessors for code generation:
1138 static int member_offset() { CHECK_INIT(_member_offset); }
1139 };
1140
1141 // Interface to java.lang.invoke.LambdaForm objects
1142 // (These are a private interface for managing adapter code generation.)
1143
1144 class java_lang_invoke_LambdaForm: AllStatic {
1145 friend class JavaClasses;
1146
1147 private:
1148 static int _vmentry_offset; // type is MemberName
1149
1150 static void compute_offsets();
1151
1152 public:
1153 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1154
1155 // Accessors
1156 static oop vmentry(oop lform);
1157
1158 // Testers
1159 static bool is_subclass(Klass* klass) {
1160 return vmClasses::LambdaForm_klass() != nullptr &&
1161 klass->is_subclass_of(vmClasses::LambdaForm_klass());
1162 }
1163 static bool is_instance(oop obj);
1164
1165 // Accessors for code generation:
1166 static int vmentry_offset() { CHECK_INIT(_vmentry_offset); }
1167 };
1168
1169 // Interface to java.lang.invoke.NativeEntryPoint objects
1170 // (These are a private interface for managing adapter code generation.)
1171
1172 class jdk_internal_foreign_abi_NativeEntryPoint: AllStatic {
1173 friend class JavaClasses;
1174
1175 private:
1176 static int _method_type_offset;
1177 static int _downcall_stub_address_offset;
1178
1179 static void compute_offsets();
1180
1181 public:
1182 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1183
1184 // Accessors
1185 static oop method_type(oop entry);
1186 static jlong downcall_stub_address(oop entry);
1187
1188 // Accessors for code generation:
1189 static int method_type_offset_in_bytes() { return _method_type_offset; }
1190 static int downcall_stub_address_offset_in_bytes() { return _downcall_stub_address_offset; }
1191 };
1192
1193 class jdk_internal_foreign_abi_ABIDescriptor: AllStatic {
1194 friend class JavaClasses;
1195
1196 private:
1197 static int _inputStorage_offset;
1198 static int _outputStorage_offset;
1199 static int _volatileStorage_offset;
1200 static int _stackAlignment_offset;
1201 static int _shadowSpace_offset;
1202 static int _scratch1_offset;
1203 static int _scratch2_offset;
1204
1205 static void compute_offsets();
1206
1207 public:
1208 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1209
1210 // Accessors
1211 static objArrayOop inputStorage(oop entry);
1212 static objArrayOop outputStorage(oop entry);
1213 static objArrayOop volatileStorage(oop entry);
1214 static jint stackAlignment(oop entry);
1215 static jint shadowSpace(oop entry);
1216 static oop scratch1(oop entry);
1217 static oop scratch2(oop entry);
1218 };
1219
1220 class jdk_internal_foreign_abi_VMStorage: AllStatic {
1221 friend class JavaClasses;
1222
1223 private:
1224 static int _type_offset;
1225 static int _indexOrOffset_offset;
1226 static int _segmentMaskOrSize_offset;
1227 static int _debugName_offset;
1228
1229 static void compute_offsets();
1230
1231 public:
1232 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1233
1234 // Accessors
1235 static jbyte type(oop entry);
1236 static jint index_or_offset(oop entry);
1237 static jshort segment_mask_or_size(oop entry);
1238 static oop debugName(oop entry);
1239
1240 // Testers
1241 static bool is_subclass(Klass* klass) {
1242 return vmClasses::VMStorage_klass() != nullptr &&
1243 klass->is_subclass_of(vmClasses::VMStorage_klass());
1244 }
1245 static bool is_instance(oop obj);
1246 };
1247
1248 class jdk_internal_foreign_abi_CallConv: AllStatic {
1249 friend class JavaClasses;
1250
1251 private:
1252 static int _argRegs_offset;
1253 static int _retRegs_offset;
1254
1255 static void compute_offsets();
1256
1257 public:
1258 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1259
1260 // Accessors
1261 static objArrayOop argRegs(oop entry);
1262 static objArrayOop retRegs(oop entry);
1263
1264 // Testers
1265 static bool is_subclass(Klass* klass) {
1266 return vmClasses::CallConv_klass() != nullptr &&
1267 klass->is_subclass_of(vmClasses::CallConv_klass());
1268 }
1269 static bool is_instance(oop obj);
1270 };
1271
1272 // Interface to java.lang.invoke.MemberName objects
1273 // (These are a private interface for Java code to query the class hierarchy.)
1274
1275 #define RESOLVEDMETHOD_INJECTED_FIELDS(macro) \
1276 macro(java_lang_invoke_ResolvedMethodName, vmtarget, intptr_signature, false)
1277
1278 class java_lang_invoke_ResolvedMethodName : AllStatic {
1279 friend class JavaClasses;
1280
1281 static int _vmtarget_offset;
1282 static int _vmholder_offset;
1283
1284 static void compute_offsets();
1285 public:
1286 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1287
1288 static int vmtarget_offset() { CHECK_INIT(_vmtarget_offset); }
1289
1290 static Method* vmtarget(oop resolved_method);
1291 static void set_vmtarget(oop resolved_method, Method* method);
1292
1293 static void set_vmholder(oop resolved_method, oop holder);
1294
1295 // find or create resolved member name
1296 static oop find_resolved_method(const methodHandle& m, TRAPS);
1297
1298 static bool is_instance(oop resolved_method);
1299 };
1300
1301
1302 #define MEMBERNAME_INJECTED_FIELDS(macro) \
1303 macro(java_lang_invoke_MemberName, vmindex, intptr_signature, false)
1304
1305
1306 class java_lang_invoke_MemberName: AllStatic {
1307 friend class JavaClasses;
1308
1309 private:
1310 // From java.lang.invoke.MemberName:
1311 // private Class<?> clazz; // class in which the method is defined
1312 // private String name; // may be null if not yet materialized
1313 // private Object type; // may be null if not yet materialized
1314 // private int flags; // modifier bits; see reflect.Modifier
1315 // private ResolvedMethodName method; // holds VM-specific target value
1316 // private intptr_t vmindex; // member index within class or interface
1317 static int _clazz_offset;
1318 static int _name_offset;
1319 static int _type_offset;
1320 static int _flags_offset;
1321 static int _method_offset;
1322 static int _vmindex_offset;
1323
1324 static void compute_offsets();
1325
1326 public:
1327 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1328 // Accessors
1329 static oop clazz(oop mname);
1330 static void set_clazz(oop mname, oop clazz);
1331
1332 static oop type(oop mname);
1333 static void set_type(oop mname, oop type);
1334
1335 static oop name(oop mname);
1336 static void set_name(oop mname, oop name);
1337
1338 static int flags(oop mname);
1339 static void set_flags(oop mname, int flags);
1340
1341 // Link through ResolvedMethodName field to get Method*
1342 static Method* vmtarget(oop mname);
1343 static void set_method(oop mname, oop method);
1344
1345 static intptr_t vmindex(oop mname);
1346 static void set_vmindex(oop mname, intptr_t index);
1347
1348 // Testers
1349 static bool is_subclass(Klass* klass) {
1350 return klass->is_subclass_of(vmClasses::MemberName_klass());
1351 }
1352 static bool is_instance(oop obj);
1353
1354 static bool is_method(oop obj);
1355
1356 // Relevant integer codes (keep these in synch. with MethodHandleNatives.Constants):
1357 enum {
1358 MN_IS_METHOD = 0x00010000, // method (not constructor)
1359 MN_IS_CONSTRUCTOR = 0x00020000, // constructor
1360 MN_IS_FIELD = 0x00040000, // field
1361 MN_IS_TYPE = 0x00080000, // nested type
1362 MN_CALLER_SENSITIVE = 0x00100000, // @CallerSensitive annotation detected
1363 MN_TRUSTED_FINAL = 0x00200000, // trusted final field
1364 MN_HIDDEN_MEMBER = 0x00400000, // @Hidden annotation detected
1365 MN_REFERENCE_KIND_SHIFT = 24, // refKind
1366 MN_REFERENCE_KIND_MASK = 0x0F000000 >> MN_REFERENCE_KIND_SHIFT,
1367 MN_NESTMATE_CLASS = 0x00000001,
1368 MN_HIDDEN_CLASS = 0x00000002,
1369 MN_STRONG_LOADER_LINK = 0x00000004,
1370 MN_ACCESS_VM_ANNOTATIONS = 0x00000008,
1371 // Lookup modes
1372 MN_MODULE_MODE = 0x00000010,
1373 MN_UNCONDITIONAL_MODE = 0x00000020,
1374 MN_TRUSTED_MODE = -1
1375 };
1376
1377 // Accessors for code generation:
1378 static int clazz_offset() { CHECK_INIT(_clazz_offset); }
1379 static int type_offset() { CHECK_INIT(_type_offset); }
1380 static int flags_offset() { CHECK_INIT(_flags_offset); }
1381 static int method_offset() { CHECK_INIT(_method_offset); }
1382 static int vmindex_offset() { CHECK_INIT(_vmindex_offset); }
1383 };
1384
1385
1386 // Interface to java.lang.invoke.MethodType objects
1387
1388 class java_lang_invoke_MethodType: AllStatic {
1389 friend class JavaClasses;
1390
1391 private:
1392 static int _rtype_offset;
1393 static int _ptypes_offset;
1394
1395 static void compute_offsets();
1396
1397 public:
1398 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1399 // Accessors
1400 static oop rtype(oop mt);
1401 static objArrayOop ptypes(oop mt);
1402
1403 static oop ptype(oop mt, int index);
1404 static int ptype_count(oop mt);
1405
1406 static int ptype_slot_count(oop mt); // extra counts for long/double
1407 static int rtype_slot_count(oop mt); // extra counts for long/double
1408
1409 static Symbol* as_signature(oop mt, bool intern_if_not_found);
1410 static void print_signature(oop mt, outputStream* st);
1411
1412 static bool is_instance(oop obj);
1413
1414 static bool equals(oop mt1, oop mt2);
1415
1416 // Accessors for code generation:
1417 static int rtype_offset() { CHECK_INIT(_rtype_offset); }
1418 static int ptypes_offset() { CHECK_INIT(_ptypes_offset); }
1419 };
1420
1421
1422 // Interface to java.lang.invoke.CallSite objects
1423 #define CALLSITE_INJECTED_FIELDS(macro) \
1424 macro(java_lang_invoke_CallSite, vmdependencies, intptr_signature, false) \
1425 macro(java_lang_invoke_CallSite, last_cleanup, long_signature, false)
1426
1427 class java_lang_invoke_CallSite: AllStatic {
1428 friend class JavaClasses;
1429
1430 private:
1431 static int _target_offset;
1432 static int _vmdependencies_offset;
1433 static int _last_cleanup_offset;
1434
1435 static void compute_offsets();
1436
1437 public:
1438 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1439 // Accessors
1440 static oop target( oop site);
1441 static void set_target( oop site, oop target);
1442 static void set_target_volatile( oop site, oop target);
1443
1444 static DependencyContext vmdependencies(oop call_site);
1445
1446 // Testers
1447 static bool is_subclass(Klass* klass) {
1448 return klass->is_subclass_of(vmClasses::CallSite_klass());
1449 }
1450 static bool is_instance(oop obj);
1451
1452 // Accessors for code generation:
1453 static int target_offset() { CHECK_INIT(_target_offset); }
1454 };
1455
1456 // Interface to java.lang.invoke.ConstantCallSite objects
1457
1458 class java_lang_invoke_ConstantCallSite: AllStatic {
1459 friend class JavaClasses;
1460
1461 private:
1462 static int _is_frozen_offset;
1463
1464 static void compute_offsets();
1465
1466 public:
1467 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1468 // Accessors
1469 static jboolean is_frozen(oop site);
1470
1471 // Testers
1472 static bool is_subclass(Klass* klass) {
1473 return klass->is_subclass_of(vmClasses::ConstantCallSite_klass());
1474 }
1475 static bool is_instance(oop obj);
1476 };
1477
1478 // Interface to java.lang.ClassLoader objects
1479
1480 #define CLASSLOADER_INJECTED_FIELDS(macro) \
1481 macro(java_lang_ClassLoader, loader_data, intptr_signature, false)
1482
1483 class java_lang_ClassLoader : AllStatic {
1484 private:
1485 static int _loader_data_offset;
1486 static int _parent_offset;
1487 static int _parallelCapable_offset;
1488 static int _name_offset;
1489 static int _nameAndId_offset;
1490 static int _unnamedModule_offset;
1491
1492 static void compute_offsets();
1493
1494 public:
1495 // Support for CDS
1496 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1497 static int loader_data_offset() { return _loader_data_offset; }
1498
1499 static ClassLoaderData* loader_data_acquire(oop loader);
1500 static ClassLoaderData* loader_data(oop loader);
1501 static void release_set_loader_data(oop loader, ClassLoaderData* new_data);
1502
1503 static oop parent(oop loader);
1504 static oop parent_no_keepalive(oop loader);
1505 static oop name(oop loader);
1506 static oop nameAndId(oop loader);
1507 static bool isAncestor(oop loader, oop cl);
1508
1509 // Support for parallelCapable field
1510 static bool parallelCapable(oop the_class_mirror);
1511
1512 static bool is_trusted_loader(oop loader);
1513
1514 // Testers
1515 static bool is_subclass(Klass* klass) {
1516 return klass->is_subclass_of(vmClasses::ClassLoader_klass());
1517 }
1518 static bool is_instance(oop obj);
1519
1520 static oop unnamedModule(oop loader);
1521
1522 // Debugging
1523 friend class JavaClasses;
1524 };
1525
1526
1527 // Interface to java.lang.System objects
1528
1529 class java_lang_System : AllStatic {
1530 private:
1531 static int _static_in_offset;
1532 static int _static_out_offset;
1533 static int _static_err_offset;
1534
1535 public:
1536 static int in_offset() { CHECK_INIT(_static_in_offset); }
1537 static int out_offset() { CHECK_INIT(_static_out_offset); }
1538 static int err_offset() { CHECK_INIT(_static_err_offset); }
1539
1540 static void compute_offsets();
1541 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1542
1543 // Debugging
1544 friend class JavaClasses;
1545 };
1546
1547
1548 // Interface to java.lang.StackTraceElement objects
1549
1550 class java_lang_StackTraceElement: AllStatic {
1551 private:
1552 static int _declaringClassObject_offset;
1553 static int _classLoaderName_offset;
1554 static int _moduleName_offset;
1555 static int _moduleVersion_offset;
1556 static int _declaringClass_offset;
1557 static int _methodName_offset;
1558 static int _fileName_offset;
1559 static int _lineNumber_offset;
1560
1561 // Setters
1562 static void set_classLoaderName(oop element, oop value);
1563 static void set_moduleName(oop element, oop value);
1564 static void set_moduleVersion(oop element, oop value);
1565 static void set_declaringClass(oop element, oop value);
1566 static void set_methodName(oop element, oop value);
1567 static void set_fileName(oop element, oop value);
1568 static void set_lineNumber(oop element, int value);
1569 static void set_declaringClassObject(oop element, oop value);
1570
1571 static void decode_file_and_line(Handle java_mirror, InstanceKlass* holder, int version,
1572 const methodHandle& method, int bci,
1573 Symbol*& source, oop& source_file, int& line_number, TRAPS);
1574
1575 public:
1576 // Create an instance of StackTraceElement
1577 static oop create(const methodHandle& method, int bci, TRAPS);
1578
1579 static void fill_in(Handle element, InstanceKlass* holder, const methodHandle& method,
1580 int version, int bci, Symbol* name, TRAPS);
1581
1582 static void compute_offsets();
1583 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1584
1585 #if INCLUDE_JVMCI
1586 static void decode(const methodHandle& method, int bci, Symbol*& fileName, int& lineNumber, TRAPS);
1587 #endif
1588
1589 // Debugging
1590 friend class JavaClasses;
1591 };
1592
1593
1594 class Backtrace: AllStatic {
1595 public:
1596 // Helper backtrace functions to store bci|version together.
1597 static int merge_bci_and_version(int bci, int version);
1598 static int merge_mid_and_cpref(int mid, int cpref);
1599 static int bci_at(unsigned int merged);
1600 static int version_at(unsigned int merged);
1601 static int mid_at(unsigned int merged);
1602 static int cpref_at(unsigned int merged);
1603 static int get_line_number(Method* method, int bci);
1604 static Symbol* get_source_file_name(InstanceKlass* holder, int version);
1605
1606 // Debugging
1607 friend class JavaClasses;
1608 };
1609
1610 class java_lang_ClassFrameInfo: AllStatic {
1611 private:
1612 static int _classOrMemberName_offset;
1613 static int _flags_offset;
1614
1615 public:
1616 static oop classOrMemberName(oop info);
1617 static int flags(oop info);
1618
1619 // Setters
1620 static void init_class(Handle stackFrame, const methodHandle& m);
1621 static void init_method(Handle stackFrame, const methodHandle& m, TRAPS);
1622
1623 static void compute_offsets();
1624 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1625
1626 // Debugging
1627 friend class JavaClasses;
1628 };
1629
1630 // Interface to java.lang.StackFrameInfo objects
1631
1632 #define STACKFRAMEINFO_INJECTED_FIELDS(macro) \
1633 macro(java_lang_StackFrameInfo, version, short_signature, false)
1634
1635 class java_lang_StackFrameInfo: AllStatic {
1636 private:
1637 static int _type_offset;
1638 static int _name_offset;
1639 static int _bci_offset;
1640 static int _version_offset;
1641 static int _contScope_offset;
1642
1643 public:
1644 // Getters
1645 static oop name(oop info);
1646 static oop type(oop info);
1647 static Method* get_method(oop info);
1648
1649 // Setters
1650 static void set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, oop cont, TRAPS);
1651 static void set_name(oop info, oop value);
1652 static void set_type(oop info, oop value);
1653 static void set_bci(oop info, int value);
1654
1655 static void set_version(oop info, short value);
1656 static void set_contScope(oop info, oop value);
1657
1658 static void compute_offsets();
1659 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1660
1661 static void to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS);
1662
1663 // Debugging
1664 friend class JavaClasses;
1665 };
1666
1667 class java_lang_LiveStackFrameInfo: AllStatic {
1668 private:
1669 static int _monitors_offset;
1670 static int _locals_offset;
1671 static int _operands_offset;
1672 static int _mode_offset;
1673
1674 public:
1675 static void set_monitors(oop info, oop value);
1676 static void set_locals(oop info, oop value);
1677 static void set_operands(oop info, oop value);
1678 static void set_mode(oop info, int value);
1679
1680 static void compute_offsets();
1681 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1682
1683 // Debugging
1684 friend class JavaClasses;
1685 };
1686
1687 // Interface to java.lang.reflect.RecordComponent objects
1688
1689 class java_lang_reflect_RecordComponent: AllStatic {
1690 private:
1691 static int _clazz_offset;
1692 static int _name_offset;
1693 static int _type_offset;
1694 static int _accessor_offset;
1695 static int _signature_offset;
1696 static int _annotations_offset;
1697 static int _typeAnnotations_offset;
1698
1699 // Setters
1700 static void set_clazz(oop element, oop value);
1701 static void set_name(oop element, oop value);
1702 static void set_type(oop element, oop value);
1703 static void set_accessor(oop element, oop value);
1704 static void set_signature(oop element, oop value);
1705 static void set_annotations(oop element, oop value);
1706 static void set_typeAnnotations(oop element, oop value);
1707
1708 public:
1709 // Create an instance of RecordComponent
1710 static oop create(InstanceKlass* holder, RecordComponent* component, TRAPS);
1711
1712 static void compute_offsets();
1713 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1714
1715 // Debugging
1716 friend class JavaClasses;
1717 };
1718
1719
1720 // Interface to java.lang.AssertionStatusDirectives objects
1721
1722 class java_lang_AssertionStatusDirectives: AllStatic {
1723 private:
1724 static int _classes_offset;
1725 static int _classEnabled_offset;
1726 static int _packages_offset;
1727 static int _packageEnabled_offset;
1728 static int _deflt_offset;
1729
1730 public:
1731 // Setters
1732 static void set_classes(oop obj, oop val);
1733 static void set_classEnabled(oop obj, oop val);
1734 static void set_packages(oop obj, oop val);
1735 static void set_packageEnabled(oop obj, oop val);
1736 static void set_deflt(oop obj, bool val);
1737
1738 static void compute_offsets();
1739 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1740
1741 // Debugging
1742 friend class JavaClasses;
1743 };
1744
1745
1746 class java_util_concurrent_locks_AbstractOwnableSynchronizer : AllStatic {
1747 private:
1748 static int _owner_offset;
1749 public:
1750 static void compute_offsets();
1751 static oop get_owner_threadObj(oop obj);
1752 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1753 };
1754
1755 // Interface to jdk.internal.misc.UnsafeConsants
1756
1757 class jdk_internal_misc_UnsafeConstants : AllStatic {
1758 public:
1759 static void set_unsafe_constants();
1760 static void compute_offsets() { }
1761 static void serialize_offsets(SerializeClosure* f) { }
1762 };
1763
1764 // Interface to jdk.internal.vm.vector.VectorSupport.VectorPayload objects
1765
1766 class vector_VectorPayload : AllStatic {
1767 private:
1768 static int _payload_offset;
1769 public:
1770 static void set_payload(oop o, oop val);
1771
1772 static void compute_offsets();
1773 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1774
1775 // Testers
1776 static bool is_subclass(Klass* klass) {
1777 return klass->is_subclass_of(vmClasses::vector_VectorPayload_klass());
1778 }
1779 static bool is_instance(oop obj);
1780 };
1781
1782 class java_lang_Integer : AllStatic {
1783 public:
1784 static jint value(oop obj);
1785 };
1786
1787 class java_lang_Long : AllStatic {
1788 public:
1789 static jlong value(oop obj);
1790 };
1791
1792 class java_lang_Character : AllStatic {
1793 public:
1794 static jchar value(oop obj);
1795 };
1796
1797 class java_lang_Short : AllStatic {
1798 public:
1799 static jshort value(oop obj);
1800 };
1801
1802 class java_lang_Byte : AllStatic {
1803 public:
1804 static jbyte value(oop obj);
1805 };
1806
1807 class java_lang_Boolean : AllStatic {
1808 private:
1809 static int _static_TRUE_offset;
1810 static int _static_FALSE_offset;
1811 public:
1812 static Symbol* symbol();
1813 static void compute_offsets(InstanceKlass* k);
1814 static oop get_TRUE(InstanceKlass *k);
1815 static oop get_FALSE(InstanceKlass *k);
1816 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1817 static jboolean value(oop obj);
1818 };
1819
1820 class java_lang_Integer_IntegerCache : AllStatic {
1821 private:
1822 static int _static_cache_offset;
1823 public:
1824 static Symbol* symbol();
1825 static void compute_offsets(InstanceKlass* k);
1826 static objArrayOop cache(InstanceKlass *k);
1827 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1828 };
1829
1830 class java_lang_Long_LongCache : AllStatic {
1831 private:
1832 static int _static_cache_offset;
1833 public:
1834 static Symbol* symbol();
1835 static void compute_offsets(InstanceKlass* k);
1836 static objArrayOop cache(InstanceKlass *k);
1837 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1838 };
1839
1840 class java_lang_Character_CharacterCache : AllStatic {
1841 private:
1842 static int _static_cache_offset;
1843 public:
1844 static Symbol* symbol();
1845 static void compute_offsets(InstanceKlass* k);
1846 static objArrayOop cache(InstanceKlass *k);
1847 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1848 };
1849
1850 class java_lang_Short_ShortCache : AllStatic {
1851 private:
1852 static int _static_cache_offset;
1853 public:
1854 static Symbol* symbol();
1855 static void compute_offsets(InstanceKlass* k);
1856 static objArrayOop cache(InstanceKlass *k);
1857 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1858 };
1859
1860 class java_lang_Byte_ByteCache : AllStatic {
1861 private:
1862 static int _static_cache_offset;
1863 public:
1864 static Symbol* symbol();
1865 static void compute_offsets(InstanceKlass* k);
1866 static objArrayOop cache(InstanceKlass *k);
1867 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1868 };
1869
1870
1871 // Interface to java.lang.InternalError objects
1872
1873 #define INTERNALERROR_INJECTED_FIELDS(macro) \
1874 macro(java_lang_InternalError, during_unsafe_access, bool_signature, false)
1875
1876 class java_lang_InternalError : AllStatic {
1877 private:
1878 static int _during_unsafe_access_offset;
1879 public:
1880 static jboolean during_unsafe_access(oop internal_error);
1881 static void set_during_unsafe_access(oop internal_error);
1882 static void compute_offsets();
1883 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1884 };
1885
1886 // Use to declare fields that need to be injected into Java classes
1887 // for the JVM to use. The name_index and signature_index are
1888 // declared in vmSymbols. The may_be_java flag is used to declare
1889 // fields that might already exist in Java but should be injected if
1890 // they don't. Otherwise the field is unconditionally injected and
1891 // the JVM uses the injected one. This is to ensure that name
1892 // collisions don't occur. In general may_be_java should be false
1893 // unless there's a good reason.
1894
1895 class InjectedField {
1896 public:
1897 const vmClassID klass_id;
1898 const vmSymbolID name_index;
1899 const vmSymbolID signature_index;
1900 const bool may_be_java;
1901
1902
1903 InstanceKlass* klass() const { return vmClasses::klass_at(klass_id); }
1904 Symbol* name() const { return lookup_symbol(name_index); }
1905 Symbol* signature() const { return lookup_symbol(signature_index); }
1906
1907 int compute_offset();
1908
1909 // Find the Symbol for this index
1910 static Symbol* lookup_symbol(vmSymbolID symbol_index) {
1911 return Symbol::vm_symbol_at(symbol_index);
1912 }
1913 };
1914
1915
1916 // Interface to hard-coded offset checking
1917
1918 enum class InjectedFieldID : int;
1919
1920 class JavaClasses : AllStatic {
1921 private:
1922
1923 static InjectedField _injected_fields[];
1924
1925 static bool check_offset(const char *klass_name, int offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1926 public:
1927
1928 static int compute_injected_offset(InjectedFieldID id);
1929
1930 static void compute_offsets();
1931 static void check_offsets() PRODUCT_RETURN;
1932 static void serialize_offsets(SerializeClosure* soc) NOT_CDS_RETURN;
1933 static InjectedField* get_injected(Symbol* class_name, int* field_count);
1934 static bool is_supported_for_archiving(oop obj) NOT_CDS_JAVA_HEAP_RETURN_(false);
1935
1936 static void compute_offset(int &dest_offset,
1937 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol,
1938 bool is_static = false);
1939 static void compute_offset(int& dest_offset, InstanceKlass* ik,
1940 const char* name_string, Symbol* signature_symbol,
1941 bool is_static = false);
1942 };
1943
1944 #undef CHECK_INIT
1945
1946 #endif // SHARE_CLASSFILE_JAVACLASSES_HPP