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
256 static int _name_offset;
257 static int _source_file_offset;
258 static int _classData_offset;
259 static int _classRedefinedCount_offset;
260 static int _reflectionData_offset;
261 static int _modifiers_offset;
262 static int _is_primitive_offset;
263 static int _is_identity_offset;
264 static int _raw_access_flags_offset;
265
266 static bool _offsets_computed;
267
268 static GrowableArray<Klass*>* _fixup_mirror_list;
269 static GrowableArray<Klass*>* _fixup_module_field_list;
270
271 static void set_init_lock(oop java_class, oop init_lock);
272 static void set_protection_domain(oop java_class, oop protection_domain);
273 static void set_class_loader(oop java_class, oop class_loader);
274 static void set_component_mirror(oop java_class, oop comp_mirror);
275 static void initialize_mirror_fields(InstanceKlass* ik, Handle mirror, Handle protection_domain,
276 Handle classData, TRAPS);
277 static void set_mirror_module_field(JavaThread* current, Klass* K, Handle mirror, Handle module);
278 static void set_is_identity(oop java_class, bool value);
279
280 static void set_modifiers(oop java_class, u2 value);
281 static void set_raw_access_flags(oop java_class, u2 value);
282 static void set_is_primitive(oop java_class);
283 static void release_set_array_klass(oop java_class, Klass* klass);
284
285 public:
286 static void allocate_fixup_lists();
287 static void compute_offsets();
288
289 // Instance creation
290 static void allocate_mirror(Klass* k, bool is_scratch, Handle protection_domain, Handle classData,
291 Handle& mirror, Handle& comp_mirror, TRAPS); // returns mirror and comp_mirror
292 static void create_mirror(Klass* k, Handle class_loader, Handle module,
293 Handle protection_domain, Handle classData, TRAPS);
294 static void fixup_mirror(Klass* k, TRAPS);
295 static oop create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS);
296
297 // Archiving
298 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
299 static void create_scratch_mirror(Klass* k, TRAPS) NOT_CDS_JAVA_HEAP_RETURN;
300 static bool restore_archived_mirror(Klass *k, Handle class_loader, Handle module,
301 Handle protection_domain,
302 TRAPS) NOT_CDS_JAVA_HEAP_RETURN_(false);
303
304 static void fixup_module_field(Klass* k, Handle module);
305
306 // Conversion -- java_class must not be null. The return value is null only if java_class is a primitive type.
307 static Klass* as_Klass(oop java_class);
308 static InstanceKlass* as_InstanceKlass(oop java_class);
309
310 static void set_klass(oop java_class, Klass* klass);
311 static BasicType as_BasicType(oop java_class, Klass** reference_klass = nullptr);
312 static Symbol* as_signature(oop java_class, bool intern_if_not_found);
313 static void print_signature(oop java_class, outputStream *st);
314 static const char* as_external_name(oop java_class);
315 // Testing
316 static bool is_instance(oop obj);
317
318 static bool is_primitive(oop java_class);
319 static BasicType primitive_type(oop java_class);
320 static oop primitive_mirror(BasicType t);
321 static Klass* array_klass_acquire(oop java_class);
322
323 // compiler support for class operations
324 static int klass_offset() { CHECK_INIT(_klass_offset); }
325 static int array_klass_offset() { CHECK_INIT(_array_klass_offset); }
326
327 // Support for classRedefinedCount field
328 static int classRedefinedCount(oop the_class_mirror);
329 static void set_classRedefinedCount(oop the_class_mirror, int value);
330
331 // Support for embedded per-class oops
332 static oop protection_domain(oop java_class);
333 static oop init_lock(oop java_class);
334 static void clear_init_lock(oop java_class) {
335 set_init_lock(java_class, nullptr);
336 }
337 static oop component_mirror(oop java_class);
338 static int component_mirror_offset() { return _component_mirror_offset; }
339 static objArrayOop signers(oop java_class);
340 static oop class_data(oop java_class);
341 static void set_class_data(oop java_class, oop classData);
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
601 static void compute_offsets();
602 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
603
604 // Testers
605 static bool is_subclass(Klass* klass) {
606 return klass->is_subclass_of(vmClasses::VirtualThread_klass());
607 }
608 static bool is_instance(oop obj);
609
610 static oop vthread_scope();
611 static oop carrier_thread(oop vthread);
612 static oop continuation(oop vthread);
613 static int state(oop vthread);
614 static void set_state(oop vthread, int state);
615 static int cmpxchg_state(oop vthread, int old_state, int new_state);
616 static oop next(oop vthread);
617 static void set_next(oop vthread, oop next_vthread);
618 static bool set_onWaitingList(oop vthread, OopHandle& list_head);
619 static jlong timeout(oop vthread);
620 static void set_timeout(oop vthread, jlong value);
621 static void set_notified(oop vthread, jboolean value);
622 static void set_interruptible_wait(oop vthread, jboolean value);
623 static bool is_preempted(oop vthread);
624 static JavaThreadStatus map_state_to_thread_status(int state);
625
626 static inline ObjectWaiter* objectWaiter(oop vthread);
627 static inline void set_objectWaiter(oop vthread, ObjectWaiter* waiter);
628 static ObjectMonitor* current_pending_monitor(oop vthread);
629 static ObjectMonitor* current_waiting_monitor(oop vthread);
630 };
631
632
633 // Interface to java.lang.Throwable objects
634
635 class java_lang_Throwable: AllStatic {
636 friend class BacktraceBuilder;
637 friend class BacktraceIterator;
638
639 private:
640 // Trace constants
641 enum {
642 trace_methods_offset = 0,
643 trace_bcis_offset = 1,
644 trace_mirrors_offset = 2,
645 trace_names_offset = 3,
646 trace_conts_offset = 4,
647 trace_next_offset = 5,
648 trace_hidden_offset = 6,
649 trace_size = 7,
650 trace_chunk_size = 32
651 };
652
653 static int _backtrace_offset;
654 static int _detailMessage_offset;
655 static int _stackTrace_offset;
656 static int _depth_offset;
657 static int _cause_offset;
658 static int _static_unassigned_stacktrace_offset;
659
660 // StackTrace (programmatic access, new since 1.4)
661 static void clear_stacktrace(oop throwable);
662 // Stacktrace (post JDK 1.7.0 to allow immutability protocol to be followed)
663 static void set_stacktrace(oop throwable, oop st_element_array);
664 static oop unassigned_stacktrace();
665
666 public:
667 // Backtrace
668 static refArrayOop backtrace(oop throwable);
669 static void set_backtrace(oop throwable, refArrayOop value);
670 static int depth(oop throwable);
671 static void set_depth(oop throwable, int value);
672 // Message
673 static int get_detailMessage_offset() { CHECK_INIT(_detailMessage_offset); }
674 static oop message(oop throwable);
675 static const char* message_as_utf8(oop throwable);
676 static void set_message(oop throwable, oop value);
677
678 static oop cause(oop throwable);
679
680 static void print_stack_element(outputStream *st, Method* method, int bci);
681
682 static void compute_offsets();
683 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
684
685 // Allocate space for backtrace (created but stack trace not filled in)
686 static void allocate_backtrace(Handle throwable, TRAPS);
687 // Fill in current stack trace for throwable with preallocated backtrace (no GC)
688 static void fill_in_stack_trace_of_preallocated_backtrace(Handle throwable);
689 // Fill in current stack trace, can cause GC
690 static void fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS);
691 static void fill_in_stack_trace(Handle throwable, const methodHandle& method = methodHandle());
692
693 // Programmatic access to stack trace
694 static void get_stack_trace_elements(int depth, Handle backtrace, refArrayHandle stack_trace, TRAPS);
695
696 // For recreating class initialization error exceptions.
697 static Handle create_initialization_error(JavaThread* current, Handle throwable);
698
699 // Printing
700 static void print(oop throwable, outputStream* st);
701 static void print_stack_trace(Handle throwable, outputStream* st);
702 static void java_printStackTrace(Handle throwable, TRAPS);
703 // Debugging
704 friend class JavaClasses;
705 // Gets the method and bci of the top frame (TOS). Returns false if this failed.
706 static bool get_top_method_and_bci(oop throwable, Method** method, int* bci);
707 };
708
709
710 // Interface to java.lang.reflect.AccessibleObject objects
711
712 class java_lang_reflect_AccessibleObject: AllStatic {
713 private:
714 // Note that to reduce dependencies on the JDK we compute these
715 // offsets at run-time.
716 static int _override_offset;
717
718 static void compute_offsets();
719
720 public:
721 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
722
723 // Accessors
724 static jboolean override(oop reflect);
725 static void set_override(oop reflect, jboolean value);
726
727 // Debugging
728 friend class JavaClasses;
729 };
730
731
732 // Interface to java.lang.reflect.Method objects
733
734 class java_lang_reflect_Method : public java_lang_reflect_AccessibleObject {
735 private:
736 // Note that to reduce dependencies on the JDK we compute these
737 // offsets at run-time.
738 static int _clazz_offset;
739 static int _name_offset;
740 static int _returnType_offset;
741 static int _parameterTypes_offset;
742 static int _exceptionTypes_offset;
743 static int _slot_offset;
744 static int _modifiers_offset;
745 static int _signature_offset;
746 static int _annotations_offset;
747 static int _parameter_annotations_offset;
748 static int _annotation_default_offset;
749
750 static void compute_offsets();
751 public:
752 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
753
754 // Allocation
755 static Handle create(TRAPS);
756
757 // Accessors
758 static oop clazz(oop reflect);
759 static void set_clazz(oop reflect, oop value);
760
761 static void set_name(oop method, oop value);
762
763 static oop return_type(oop method);
764 static void set_return_type(oop method, oop value);
765
766 static oop parameter_types(oop method);
767 static void set_parameter_types(oop method, oop value);
768
769 static int slot(oop reflect);
770 static void set_slot(oop reflect, int value);
771
772 static void set_exception_types(oop method, oop value);
773 static void set_modifiers(oop method, int value);
774 static void set_signature(oop method, oop value);
775 static void set_annotations(oop method, oop value);
776 static void set_parameter_annotations(oop method, oop value);
777 static void set_annotation_default(oop method, oop value);
778
779 // Debugging
780 friend class JavaClasses;
781 };
782
783
784 // Interface to java.lang.reflect.Constructor objects
785
786 class java_lang_reflect_Constructor : public java_lang_reflect_AccessibleObject {
787 private:
788 // Note that to reduce dependencies on the JDK we compute these
789 // offsets at run-time.
790 static int _clazz_offset;
791 static int _parameterTypes_offset;
792 static int _exceptionTypes_offset;
793 static int _slot_offset;
794 static int _modifiers_offset;
795 static int _signature_offset;
796 static int _annotations_offset;
797 static int _parameter_annotations_offset;
798
799 static void compute_offsets();
800 public:
801 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
802
803 // Allocation
804 static Handle create(TRAPS);
805
806 // Accessors
807 static oop clazz(oop reflect);
808 static void set_clazz(oop reflect, oop value);
809
810 static oop parameter_types(oop constructor);
811 static void set_parameter_types(oop constructor, oop value);
812
813 static int slot(oop reflect);
814 static void set_slot(oop reflect, int value);
815
816 static void set_exception_types(oop constructor, oop value);
817 static void set_modifiers(oop constructor, int value);
818 static void set_signature(oop constructor, oop value);
819 static void set_annotations(oop constructor, oop value);
820 static void set_parameter_annotations(oop method, oop value);
821
822 // Debugging
823 friend class JavaClasses;
824 };
825
826
827 // Interface to java.lang.reflect.Field objects
828
829 class java_lang_reflect_Field : public java_lang_reflect_AccessibleObject {
830 private:
831 // Note that to reduce dependencies on the JDK we compute these
832 // offsets at run-time.
833 static int _clazz_offset;
834 static int _name_offset;
835 static int _type_offset;
836 static int _slot_offset;
837 static int _modifiers_offset;
838 static int _flags_offset;
839 static int _signature_offset;
840 static int _annotations_offset;
841
842 static void compute_offsets();
843
844 public:
845 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
846
847 // Allocation
848 static Handle create(TRAPS);
849
850 // Accessors
851 static oop clazz(oop reflect);
852 static void set_clazz(oop reflect, oop value);
853
854 static oop name(oop field);
855 static void set_name(oop field, oop value);
856
857 static oop type(oop field);
858 static void set_type(oop field, oop value);
859
860 static int slot(oop reflect);
861 static void set_slot(oop reflect, int value);
862
863 static int modifiers(oop field);
864 static void set_modifiers(oop field, int value);
865
866 static void set_flags(oop field, int value);
867
868 static void set_signature(oop constructor, oop value);
869 static void set_annotations(oop constructor, oop value);
870
871 // Debugging
872 friend class JavaClasses;
873 };
874
875 class java_lang_reflect_Parameter {
876 private:
877 // Note that to reduce dependencies on the JDK we compute these
878 // offsets at run-time.
879 static int _name_offset;
880 static int _modifiers_offset;
881 static int _index_offset;
882 static int _executable_offset;
883
884 static void compute_offsets();
885
886 public:
887 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
888
889 // Allocation
890 static Handle create(TRAPS);
891
892 // Accessors
893 static oop name(oop field);
894 static void set_name(oop field, oop value);
895
896 static int index(oop reflect);
897 static void set_index(oop reflect, int value);
898
899 static int modifiers(oop reflect);
900 static void set_modifiers(oop reflect, int value);
901
902 static oop executable(oop constructor);
903 static void set_executable(oop constructor, oop value);
904
905 friend class JavaClasses;
906 };
907
908 #define MODULE_INJECTED_FIELDS(macro) \
909 macro(java_lang_Module, module_entry, intptr_signature, false)
910
911 class java_lang_Module {
912 private:
913 static int _loader_offset;
914 static int _name_offset;
915 static int _module_entry_offset;
916
917 static void compute_offsets();
918
919 public:
920 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
921
922 // Allocation
923 static Handle create(Handle loader, Handle module_name, TRAPS);
924
925 // Testers
926 static bool is_instance(oop obj);
927
928 // Accessors
929 static oop loader(oop module);
930 static void set_loader(oop module, oop value);
931
932 // CDS
933 static int module_entry_offset() { return _module_entry_offset; }
934
935 static oop name(oop module);
936 static void set_name(oop module, oop value);
937
938 static ModuleEntry* module_entry(oop module);
939 static ModuleEntry* module_entry_raw(oop module);
940 static void set_module_entry(oop module, ModuleEntry* module_entry);
941
942 friend class JavaClasses;
943 };
944
945 #define CONSTANTPOOL_INJECTED_FIELDS(macro) \
946 macro(reflect_ConstantPool, vmholder, object_signature, false)
947
948 // Interface to jdk.internal.reflect.ConstantPool objects
949 class reflect_ConstantPool {
950 private:
951 // Note that to reduce dependencies on the JDK we compute these
952 // offsets at run-time. This field is the oop offset for the
953 // actual constant pool, previously called constantPoolOop.
954 static int _vmholder_offset;
955
956 static void compute_offsets();
957
958 public:
959 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
960
961 // Allocation
962 static Handle create(TRAPS);
963
964 // Accessors
965 static void set_cp(oop reflect, ConstantPool* value);
966
967 static ConstantPool* get_cp(oop reflect);
968
969 // Debugging
970 friend class JavaClasses;
971 };
972
973
974 // Interface to java.lang primitive type boxing objects:
975 // - java.lang.Boolean
976 // - java.lang.Character
977 // - java.lang.Float
978 // - java.lang.Double
979 // - java.lang.Byte
980 // - java.lang.Short
981 // - java.lang.Integer
982 // - java.lang.Long
983
984 // This could be separated out into 8 individual classes.
985
986 class java_lang_boxing_object: AllStatic {
987 private:
988 static int* _offsets;
989
990 static void compute_offsets();
991 static oop initialize_and_allocate(BasicType type, TRAPS);
992 public:
993 // Allocation. Returns a boxed value, or null for invalid type.
994 static oop create(BasicType type, jvalue* value, TRAPS);
995 // Accessors. Returns the basic type being boxed, or T_ILLEGAL for invalid oop.
996 static BasicType get_value(oop box, jvalue* value);
997 static BasicType set_value(oop box, jvalue* value);
998 static BasicType basic_type(oop box);
999 static bool is_instance(oop box) { return basic_type(box) != T_ILLEGAL; }
1000 static bool is_instance(oop box, BasicType type) { return basic_type(box) == type; }
1001 static void print(oop box, outputStream* st) { jvalue value; print(get_value(box, &value), &value, st); }
1002 static void print(BasicType type, jvalue* value, outputStream* st);
1003
1004 static int value_offset(BasicType type) {
1005 assert(type >= T_BOOLEAN && type <= T_LONG, "BasicType out of range");
1006 assert(_offsets != nullptr, "Uninitialized offsets");
1007 return _offsets[type - T_BOOLEAN];
1008 }
1009
1010 static void serialize_offsets(SerializeClosure* f);
1011
1012 // Debugging
1013 friend class JavaClasses;
1014 };
1015
1016
1017
1018 // Interface to java.lang.ref.Reference objects
1019
1020 class java_lang_ref_Reference: AllStatic {
1021 static int _referent_offset;
1022 static int _queue_offset;
1023 static int _next_offset;
1024 static int _discovered_offset;
1025
1026 static bool _offsets_initialized;
1027
1028 public:
1029 // Accessors
1030 static inline oop weak_referent_no_keepalive(oop ref);
1031 static inline oop weak_referent(oop ref);
1032 static inline oop phantom_referent_no_keepalive(oop ref);
1033 static inline oop unknown_referent_no_keepalive(oop ref);
1034 static inline void clear_referent(oop ref);
1035 static inline void clear_referent_raw(oop ref);
1036 static inline HeapWord* referent_addr_raw(oop ref);
1037 static inline oop next(oop ref);
1038 static inline void set_next(oop ref, oop value);
1039 static inline void set_next_raw(oop ref, oop value);
1040 static inline HeapWord* next_addr_raw(oop ref);
1041 static inline oop discovered(oop ref);
1042 static inline void set_discovered(oop ref, oop value);
1043 static inline void set_discovered_raw(oop ref, oop value);
1044 static inline HeapWord* discovered_addr_raw(oop ref);
1045 static bool is_referent_field(oop obj, ptrdiff_t offset);
1046 static inline bool is_final(oop ref);
1047 static inline bool is_phantom(oop ref);
1048 static inline bool is_weak(oop ref);
1049 static inline bool is_soft(oop ref);
1050
1051 static int referent_offset() { CHECK_INIT(_referent_offset); }
1052 static int queue_offset() { CHECK_INIT(_queue_offset); }
1053 static int next_offset() { CHECK_INIT(_next_offset); }
1054 static int discovered_offset() { CHECK_INIT(_discovered_offset); }
1055
1056 static void compute_offsets();
1057 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1058 };
1059
1060
1061 // Interface to java.lang.ref.SoftReference objects
1062
1063 class java_lang_ref_SoftReference: public java_lang_ref_Reference {
1064 static int _timestamp_offset;
1065 static int _static_clock_offset;
1066
1067 public:
1068 // Accessors
1069 static jlong timestamp(oop ref);
1070
1071 // Accessors for statics
1072 static jlong clock();
1073 static void set_clock(jlong value);
1074
1075 static void compute_offsets();
1076 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1077 };
1078
1079 // Interface to java.lang.invoke.MethodHandle objects
1080
1081 class java_lang_invoke_MethodHandle: AllStatic {
1082 friend class JavaClasses;
1083
1084 private:
1085 static int _type_offset; // the MethodType of this MH
1086 static int _form_offset; // the LambdaForm of this MH
1087
1088 static void compute_offsets();
1089
1090 public:
1091 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1092
1093 // Accessors
1094 static oop type(oop mh);
1095 static void set_type(oop mh, oop mtype);
1096
1097 static oop form(oop mh);
1098 static void set_form(oop mh, oop lform);
1099
1100 // Testers
1101 static bool is_subclass(Klass* klass) {
1102 return klass->is_subclass_of(vmClasses::MethodHandle_klass());
1103 }
1104 static bool is_instance(oop obj);
1105
1106 // Accessors for code generation:
1107 static int type_offset() { CHECK_INIT(_type_offset); }
1108 static int form_offset() { CHECK_INIT(_form_offset); }
1109 };
1110
1111 // Interface to java.lang.invoke.DirectMethodHandle objects
1112
1113 class java_lang_invoke_DirectMethodHandle: AllStatic {
1114 friend class JavaClasses;
1115
1116 private:
1117 static int _member_offset; // the MemberName of this DMH
1118
1119 static void compute_offsets();
1120
1121 public:
1122 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1123
1124 // Accessors
1125 static oop member(oop mh);
1126
1127 // Testers
1128 static bool is_subclass(Klass* klass) {
1129 return klass->is_subclass_of(vmClasses::DirectMethodHandle_klass());
1130 }
1131 static bool is_instance(oop obj);
1132
1133 // Accessors for code generation:
1134 static int member_offset() { CHECK_INIT(_member_offset); }
1135 };
1136
1137 // Interface to java.lang.invoke.LambdaForm objects
1138 // (These are a private interface for managing adapter code generation.)
1139
1140 class java_lang_invoke_LambdaForm: AllStatic {
1141 friend class JavaClasses;
1142
1143 private:
1144 static int _vmentry_offset; // type is MemberName
1145
1146 static void compute_offsets();
1147
1148 public:
1149 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1150
1151 // Accessors
1152 static oop vmentry(oop lform);
1153
1154 // Testers
1155 static bool is_subclass(Klass* klass) {
1156 return vmClasses::LambdaForm_klass() != nullptr &&
1157 klass->is_subclass_of(vmClasses::LambdaForm_klass());
1158 }
1159 static bool is_instance(oop obj);
1160
1161 // Accessors for code generation:
1162 static int vmentry_offset() { CHECK_INIT(_vmentry_offset); }
1163 };
1164
1165 // Interface to java.lang.invoke.NativeEntryPoint objects
1166 // (These are a private interface for managing adapter code generation.)
1167
1168 class jdk_internal_foreign_abi_NativeEntryPoint: AllStatic {
1169 friend class JavaClasses;
1170
1171 private:
1172 static int _method_type_offset;
1173 static int _downcall_stub_address_offset;
1174
1175 static void compute_offsets();
1176
1177 public:
1178 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1179
1180 // Accessors
1181 static oop method_type(oop entry);
1182 static jlong downcall_stub_address(oop entry);
1183
1184 // Accessors for code generation:
1185 static int method_type_offset_in_bytes() { return _method_type_offset; }
1186 static int downcall_stub_address_offset_in_bytes() { return _downcall_stub_address_offset; }
1187 };
1188
1189 class jdk_internal_foreign_abi_ABIDescriptor: AllStatic {
1190 friend class JavaClasses;
1191
1192 private:
1193 static int _inputStorage_offset;
1194 static int _outputStorage_offset;
1195 static int _volatileStorage_offset;
1196 static int _stackAlignment_offset;
1197 static int _shadowSpace_offset;
1198 static int _scratch1_offset;
1199 static int _scratch2_offset;
1200
1201 static void compute_offsets();
1202
1203 public:
1204 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1205
1206 // Accessors
1207 static refArrayOop inputStorage(oop entry);
1208 static refArrayOop outputStorage(oop entry);
1209 static refArrayOop volatileStorage(oop entry);
1210 static jint stackAlignment(oop entry);
1211 static jint shadowSpace(oop entry);
1212 static oop scratch1(oop entry);
1213 static oop scratch2(oop entry);
1214 };
1215
1216 class jdk_internal_foreign_abi_VMStorage: AllStatic {
1217 friend class JavaClasses;
1218
1219 private:
1220 static int _type_offset;
1221 static int _indexOrOffset_offset;
1222 static int _segmentMaskOrSize_offset;
1223 static int _debugName_offset;
1224
1225 static void compute_offsets();
1226
1227 public:
1228 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1229
1230 // Accessors
1231 static jbyte type(oop entry);
1232 static jint index_or_offset(oop entry);
1233 static jshort segment_mask_or_size(oop entry);
1234 static oop debugName(oop entry);
1235
1236 // Testers
1237 static bool is_subclass(Klass* klass) {
1238 return vmClasses::VMStorage_klass() != nullptr &&
1239 klass->is_subclass_of(vmClasses::VMStorage_klass());
1240 }
1241 static bool is_instance(oop obj);
1242 };
1243
1244 class jdk_internal_foreign_abi_CallConv: AllStatic {
1245 friend class JavaClasses;
1246
1247 private:
1248 static int _argRegs_offset;
1249 static int _retRegs_offset;
1250
1251 static void compute_offsets();
1252
1253 public:
1254 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1255
1256 // Accessors
1257 static refArrayOop argRegs(oop entry);
1258 static refArrayOop retRegs(oop entry);
1259
1260 // Testers
1261 static bool is_subclass(Klass* klass) {
1262 return vmClasses::CallConv_klass() != nullptr &&
1263 klass->is_subclass_of(vmClasses::CallConv_klass());
1264 }
1265 static bool is_instance(oop obj);
1266 };
1267
1268 // Interface to java.lang.invoke.MemberName objects
1269 // (These are a private interface for Java code to query the class hierarchy.)
1270
1271 #define RESOLVEDMETHOD_INJECTED_FIELDS(macro) \
1272 macro(java_lang_invoke_ResolvedMethodName, vmtarget, intptr_signature, false)
1273
1274 class java_lang_invoke_ResolvedMethodName : AllStatic {
1275 friend class JavaClasses;
1276
1277 static int _vmtarget_offset;
1278 static int _vmholder_offset;
1279
1280 static void compute_offsets();
1281 public:
1282 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1283
1284 static int vmtarget_offset() { CHECK_INIT(_vmtarget_offset); }
1285
1286 static Method* vmtarget(oop resolved_method);
1287 static void set_vmtarget(oop resolved_method, Method* method);
1288
1289 static void set_vmholder(oop resolved_method, oop holder);
1290
1291 // find or create resolved member name
1292 static oop find_resolved_method(const methodHandle& m, TRAPS);
1293
1294 static bool is_instance(oop resolved_method);
1295 };
1296
1297
1298 #define MEMBERNAME_INJECTED_FIELDS(macro) \
1299 macro(java_lang_invoke_MemberName, vmindex, intptr_signature, false)
1300
1301
1302 class java_lang_invoke_MemberName: AllStatic {
1303 friend class JavaClasses;
1304
1305 private:
1306 // From java.lang.invoke.MemberName:
1307 // private Class<?> clazz; // class in which the method is defined
1308 // private String name; // may be null if not yet materialized
1309 // private Object type; // may be null if not yet materialized
1310 // private int flags; // modifier bits; see reflect.Modifier
1311 // private ResolvedMethodName method; // holds VM-specific target value
1312 // private intptr_t vmindex; // member index within class or interface
1313 static int _clazz_offset;
1314 static int _name_offset;
1315 static int _type_offset;
1316 static int _flags_offset;
1317 static int _method_offset;
1318 static int _vmindex_offset;
1319
1320 static void compute_offsets();
1321
1322 public:
1323 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1324 // Accessors
1325 static oop clazz(oop mname);
1326 static void set_clazz(oop mname, oop clazz);
1327
1328 static oop type(oop mname);
1329 static void set_type(oop mname, oop type);
1330
1331 static oop name(oop mname);
1332 static void set_name(oop mname, oop name);
1333
1334 static int flags(oop mname);
1335 static void set_flags(oop mname, int flags);
1336
1337 // Link through ResolvedMethodName field to get Method*
1338 static Method* vmtarget(oop mname);
1339 static void set_method(oop mname, oop method);
1340
1341 static intptr_t vmindex(oop mname);
1342 static void set_vmindex(oop mname, intptr_t index);
1343
1344 // Testers
1345 static bool is_subclass(Klass* klass) {
1346 return klass->is_subclass_of(vmClasses::MemberName_klass());
1347 }
1348 static bool is_instance(oop obj);
1349
1350 static bool is_method(oop obj);
1351
1352 // Relevant integer codes (keep these in synch. with MethodHandleNatives.Constants):
1353 enum {
1354 MN_IS_METHOD = 0x00010000, // method (not constructor)
1355 MN_IS_OBJECT_CONSTRUCTOR = 0x00020000, // constructor
1356 MN_IS_FIELD = 0x00040000, // field
1357 MN_IS_TYPE = 0x00080000, // nested type
1358 MN_CALLER_SENSITIVE = 0x00100000, // @CallerSensitive annotation detected
1359 MN_TRUSTED_FINAL = 0x00200000, // trusted final field
1360 MN_HIDDEN_MEMBER = 0x00400000, // @Hidden annotation detected
1361 MN_NULL_RESTRICTED_FIELD = 0x00800000, // null-restricted field
1362 MN_REFERENCE_KIND_SHIFT = 24, // refKind
1363 MN_REFERENCE_KIND_MASK = 0x0F000000 >> MN_REFERENCE_KIND_SHIFT, // 4 bits
1364 MN_LAYOUT_SHIFT = 28, // field layout
1365 MN_LAYOUT_MASK = 0x70000000 >> MN_LAYOUT_SHIFT, // 3 bits
1366 MN_NESTMATE_CLASS = 0x00000001,
1367 MN_HIDDEN_CLASS = 0x00000002,
1368 MN_STRONG_LOADER_LINK = 0x00000004,
1369 MN_ACCESS_VM_ANNOTATIONS = 0x00000008,
1370 // Lookup modes
1371 MN_MODULE_MODE = 0x00000010,
1372 MN_UNCONDITIONAL_MODE = 0x00000020,
1373 MN_TRUSTED_MODE = -1
1374 };
1375
1376 // Accessors for code generation:
1377 static int clazz_offset() { CHECK_INIT(_clazz_offset); }
1378 static int type_offset() { CHECK_INIT(_type_offset); }
1379 static int flags_offset() { CHECK_INIT(_flags_offset); }
1380 static int method_offset() { CHECK_INIT(_method_offset); }
1381 static int vmindex_offset() { CHECK_INIT(_vmindex_offset); }
1382 };
1383
1384
1385 // Interface to java.lang.invoke.MethodType objects
1386
1387 class java_lang_invoke_MethodType: AllStatic {
1388 friend class JavaClasses;
1389
1390 private:
1391 static int _rtype_offset;
1392 static int _ptypes_offset;
1393
1394 static void compute_offsets();
1395
1396 public:
1397 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1398 // Accessors
1399 static oop rtype(oop mt);
1400 static refArrayOop ptypes(oop mt);
1401
1402 static oop ptype(oop mt, int index);
1403 static int ptype_count(oop mt);
1404
1405 static int ptype_slot_count(oop mt); // extra counts for long/double
1406 static int rtype_slot_count(oop mt); // extra counts for long/double
1407
1408 static Symbol* as_signature(oop mt, bool intern_if_not_found);
1409 static void print_signature(oop mt, outputStream* st);
1410
1411 static bool is_instance(oop obj);
1412
1413 static bool equals(oop mt1, oop mt2);
1414
1415 // Accessors for code generation:
1416 static int rtype_offset() { CHECK_INIT(_rtype_offset); }
1417 static int ptypes_offset() { CHECK_INIT(_ptypes_offset); }
1418 };
1419
1420
1421 // Interface to java.lang.invoke.CallSite objects
1422 #define CALLSITE_INJECTED_FIELDS(macro) \
1423 macro(java_lang_invoke_CallSite, vmdependencies, intptr_signature, false) \
1424 macro(java_lang_invoke_CallSite, last_cleanup, long_signature, false)
1425
1426 class java_lang_invoke_CallSite: AllStatic {
1427 friend class JavaClasses;
1428
1429 private:
1430 static int _target_offset;
1431 static int _vmdependencies_offset;
1432 static int _last_cleanup_offset;
1433
1434 static void compute_offsets();
1435
1436 public:
1437 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1438 // Accessors
1439 static oop target( oop site);
1440 static void set_target( oop site, oop target);
1441 static void set_target_volatile( oop site, oop target);
1442
1443 static DependencyContext vmdependencies(oop call_site);
1444
1445 // Testers
1446 static bool is_subclass(Klass* klass) {
1447 return klass->is_subclass_of(vmClasses::CallSite_klass());
1448 }
1449 static bool is_instance(oop obj);
1450
1451 // Accessors for code generation:
1452 static int target_offset() { CHECK_INIT(_target_offset); }
1453 };
1454
1455 // Interface to java.lang.invoke.ConstantCallSite objects
1456
1457 class java_lang_invoke_ConstantCallSite: AllStatic {
1458 friend class JavaClasses;
1459
1460 private:
1461 static int _is_frozen_offset;
1462
1463 static void compute_offsets();
1464
1465 public:
1466 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1467 // Accessors
1468 static jboolean is_frozen(oop site);
1469
1470 // Testers
1471 static bool is_subclass(Klass* klass) {
1472 return klass->is_subclass_of(vmClasses::ConstantCallSite_klass());
1473 }
1474 static bool is_instance(oop obj);
1475 };
1476
1477 // Interface to java.lang.ClassLoader objects
1478
1479 #define CLASSLOADER_INJECTED_FIELDS(macro) \
1480 macro(java_lang_ClassLoader, loader_data, intptr_signature, false)
1481
1482 class java_lang_ClassLoader : AllStatic {
1483 private:
1484 static int _loader_data_offset;
1485 static int _parent_offset;
1486 static int _parallelCapable_offset;
1487 static int _name_offset;
1488 static int _nameAndId_offset;
1489 static int _unnamedModule_offset;
1490
1491 static void compute_offsets();
1492
1493 public:
1494 // Support for CDS
1495 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1496 static int loader_data_offset() { return _loader_data_offset; }
1497
1498 static ClassLoaderData* loader_data_acquire(oop loader);
1499 static ClassLoaderData* loader_data(oop loader);
1500 static void release_set_loader_data(oop loader, ClassLoaderData* new_data);
1501
1502 static oop parent(oop loader);
1503 static oop parent_no_keepalive(oop loader);
1504 static oop name(oop loader);
1505 static oop nameAndId(oop loader);
1506 static bool isAncestor(oop loader, oop cl);
1507
1508 // Support for parallelCapable field
1509 static bool parallelCapable(oop the_class_mirror);
1510
1511 static bool is_trusted_loader(oop loader);
1512
1513 // Testers
1514 static bool is_subclass(Klass* klass) {
1515 return klass->is_subclass_of(vmClasses::ClassLoader_klass());
1516 }
1517 static bool is_instance(oop obj);
1518
1519 static oop unnamedModule(oop loader);
1520
1521 // Debugging
1522 friend class JavaClasses;
1523 };
1524
1525
1526 // Interface to java.lang.System objects
1527
1528 class java_lang_System : AllStatic {
1529 private:
1530 static int _static_in_offset;
1531 static int _static_out_offset;
1532 static int _static_err_offset;
1533
1534 public:
1535 static int in_offset() { CHECK_INIT(_static_in_offset); }
1536 static int out_offset() { CHECK_INIT(_static_out_offset); }
1537 static int err_offset() { CHECK_INIT(_static_err_offset); }
1538
1539 static void compute_offsets();
1540 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1541
1542 // Debugging
1543 friend class JavaClasses;
1544 };
1545
1546
1547 // Interface to java.lang.StackTraceElement objects
1548
1549 class java_lang_StackTraceElement: AllStatic {
1550 private:
1551 static int _declaringClassObject_offset;
1552 static int _classLoaderName_offset;
1553 static int _moduleName_offset;
1554 static int _moduleVersion_offset;
1555 static int _declaringClass_offset;
1556 static int _methodName_offset;
1557 static int _fileName_offset;
1558 static int _lineNumber_offset;
1559
1560 // Setters
1561 static void set_classLoaderName(oop element, oop value);
1562 static void set_moduleName(oop element, oop value);
1563 static void set_moduleVersion(oop element, oop value);
1564 static void set_declaringClass(oop element, oop value);
1565 static void set_methodName(oop element, oop value);
1566 static void set_fileName(oop element, oop value);
1567 static void set_lineNumber(oop element, int value);
1568 static void set_declaringClassObject(oop element, oop value);
1569
1570 static void decode_file_and_line(Handle java_mirror, InstanceKlass* holder, int version,
1571 const methodHandle& method, int bci,
1572 Symbol*& source, oop& source_file, int& line_number, TRAPS);
1573
1574 public:
1575 // Create an instance of StackTraceElement
1576 static oop create(const methodHandle& method, int bci, TRAPS);
1577
1578 static void fill_in(Handle element, InstanceKlass* holder, const methodHandle& method,
1579 int version, int bci, Symbol* name, TRAPS);
1580
1581 static void compute_offsets();
1582 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1583
1584 #if INCLUDE_JVMCI
1585 static void decode(const methodHandle& method, int bci, Symbol*& fileName, int& lineNumber, TRAPS);
1586 #endif
1587
1588 // Debugging
1589 friend class JavaClasses;
1590 };
1591
1592
1593 class Backtrace: AllStatic {
1594 public:
1595 // Helper backtrace functions to store bci|version together.
1596 static int merge_bci_and_version(int bci, int version);
1597 static int merge_mid_and_cpref(int mid, int cpref);
1598 static int bci_at(unsigned int merged);
1599 static int version_at(unsigned int merged);
1600 static int mid_at(unsigned int merged);
1601 static int cpref_at(unsigned int merged);
1602 static int get_line_number(Method* method, int bci);
1603 static Symbol* get_source_file_name(InstanceKlass* holder, int version);
1604
1605 // Debugging
1606 friend class JavaClasses;
1607 };
1608
1609 class java_lang_ClassFrameInfo: AllStatic {
1610 private:
1611 static int _classOrMemberName_offset;
1612 static int _flags_offset;
1613
1614 public:
1615 static oop classOrMemberName(oop info);
1616 static int flags(oop info);
1617
1618 // Setters
1619 static void init_class(Handle stackFrame, const methodHandle& m);
1620 static void init_method(Handle stackFrame, const methodHandle& m, TRAPS);
1621
1622 static void compute_offsets();
1623 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1624
1625 // Debugging
1626 friend class JavaClasses;
1627 };
1628
1629 // Interface to java.lang.StackFrameInfo objects
1630
1631 #define STACKFRAMEINFO_INJECTED_FIELDS(macro) \
1632 macro(java_lang_StackFrameInfo, version, short_signature, false)
1633
1634 class java_lang_StackFrameInfo: AllStatic {
1635 private:
1636 static int _type_offset;
1637 static int _name_offset;
1638 static int _bci_offset;
1639 static int _version_offset;
1640 static int _contScope_offset;
1641
1642 public:
1643 // Getters
1644 static oop name(oop info);
1645 static oop type(oop info);
1646 static Method* get_method(oop info);
1647
1648 // Setters
1649 static void set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, oop cont, TRAPS);
1650 static void set_name(oop info, oop value);
1651 static void set_type(oop info, oop value);
1652 static void set_bci(oop info, int value);
1653
1654 static void set_version(oop info, short value);
1655 static void set_contScope(oop info, oop value);
1656
1657 static void compute_offsets();
1658 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1659
1660 static void to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS);
1661
1662 // Debugging
1663 friend class JavaClasses;
1664 };
1665
1666 class java_lang_LiveStackFrameInfo: AllStatic {
1667 private:
1668 static int _monitors_offset;
1669 static int _locals_offset;
1670 static int _operands_offset;
1671 static int _mode_offset;
1672
1673 public:
1674 static void set_monitors(oop info, oop value);
1675 static void set_locals(oop info, oop value);
1676 static void set_operands(oop info, oop value);
1677 static void set_mode(oop info, int value);
1678
1679 static void compute_offsets();
1680 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1681
1682 // Debugging
1683 friend class JavaClasses;
1684 };
1685
1686 // Interface to java.lang.reflect.RecordComponent objects
1687
1688 class java_lang_reflect_RecordComponent: AllStatic {
1689 private:
1690 static int _clazz_offset;
1691 static int _name_offset;
1692 static int _type_offset;
1693 static int _accessor_offset;
1694 static int _signature_offset;
1695 static int _annotations_offset;
1696 static int _typeAnnotations_offset;
1697
1698 // Setters
1699 static void set_clazz(oop element, oop value);
1700 static void set_name(oop element, oop value);
1701 static void set_type(oop element, oop value);
1702 static void set_accessor(oop element, oop value);
1703 static void set_signature(oop element, oop value);
1704 static void set_annotations(oop element, oop value);
1705 static void set_typeAnnotations(oop element, oop value);
1706
1707 public:
1708 // Create an instance of RecordComponent
1709 static oop create(InstanceKlass* holder, RecordComponent* component, TRAPS);
1710
1711 static void compute_offsets();
1712 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1713
1714 // Debugging
1715 friend class JavaClasses;
1716 };
1717
1718
1719 // Interface to java.lang.AssertionStatusDirectives objects
1720
1721 class java_lang_AssertionStatusDirectives: AllStatic {
1722 private:
1723 static int _classes_offset;
1724 static int _classEnabled_offset;
1725 static int _packages_offset;
1726 static int _packageEnabled_offset;
1727 static int _deflt_offset;
1728
1729 public:
1730 // Setters
1731 static void set_classes(oop obj, oop val);
1732 static void set_classEnabled(oop obj, oop val);
1733 static void set_packages(oop obj, oop val);
1734 static void set_packageEnabled(oop obj, oop val);
1735 static void set_deflt(oop obj, bool val);
1736
1737 static void compute_offsets();
1738 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1739
1740 // Debugging
1741 friend class JavaClasses;
1742 };
1743
1744
1745 class java_util_concurrent_locks_AbstractOwnableSynchronizer : AllStatic {
1746 private:
1747 static int _owner_offset;
1748 public:
1749 static void compute_offsets();
1750 static oop get_owner_threadObj(oop obj);
1751 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1752 };
1753
1754 // Interface to jdk.internal.misc.UnsafeConsants
1755
1756 class jdk_internal_misc_UnsafeConstants : AllStatic {
1757 public:
1758 static void set_unsafe_constants();
1759 static void compute_offsets() { }
1760 static void serialize_offsets(SerializeClosure* f) { }
1761 };
1762
1763 // Interface to jdk.internal.vm.vector.VectorSupport.VectorPayload objects
1764
1765 class vector_VectorPayload : AllStatic {
1766 private:
1767 static int _payload_offset;
1768 public:
1769 static void set_payload(oop o, oop val);
1770
1771 static void compute_offsets();
1772 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1773
1774 // Testers
1775 static bool is_subclass(Klass* klass) {
1776 return klass->is_subclass_of(vmClasses::vector_VectorPayload_klass());
1777 }
1778 static bool is_instance(oop obj);
1779 };
1780
1781 class java_lang_Integer : AllStatic {
1782 public:
1783 static jint value(oop obj);
1784 };
1785
1786 class java_lang_Long : AllStatic {
1787 public:
1788 static jlong value(oop obj);
1789 };
1790
1791 class java_lang_Character : AllStatic {
1792 public:
1793 static jchar value(oop obj);
1794 };
1795
1796 class java_lang_Short : AllStatic {
1797 public:
1798 static jshort value(oop obj);
1799 };
1800
1801 class java_lang_Byte : AllStatic {
1802 public:
1803 static jbyte value(oop obj);
1804 };
1805
1806 class java_lang_Boolean : AllStatic {
1807 private:
1808 static int _static_TRUE_offset;
1809 static int _static_FALSE_offset;
1810 public:
1811 static Symbol* symbol();
1812 static void compute_offsets(InstanceKlass* k);
1813 static oop get_TRUE(InstanceKlass *k);
1814 static oop get_FALSE(InstanceKlass *k);
1815 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1816 static jboolean value(oop obj);
1817 };
1818
1819 class java_lang_Integer_IntegerCache : AllStatic {
1820 private:
1821 static int _static_cache_offset;
1822 public:
1823 static Symbol* symbol();
1824 static void compute_offsets(InstanceKlass* k);
1825 static refArrayOop cache(InstanceKlass *k);
1826 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1827 };
1828
1829 class java_lang_Long_LongCache : AllStatic {
1830 private:
1831 static int _static_cache_offset;
1832 public:
1833 static Symbol* symbol();
1834 static void compute_offsets(InstanceKlass* k);
1835 static refArrayOop cache(InstanceKlass *k);
1836 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1837 };
1838
1839 class java_lang_Character_CharacterCache : AllStatic {
1840 private:
1841 static int _static_cache_offset;
1842 public:
1843 static Symbol* symbol();
1844 static void compute_offsets(InstanceKlass* k);
1845 static refArrayOop cache(InstanceKlass *k);
1846 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1847 };
1848
1849 class java_lang_Short_ShortCache : AllStatic {
1850 private:
1851 static int _static_cache_offset;
1852 public:
1853 static Symbol* symbol();
1854 static void compute_offsets(InstanceKlass* k);
1855 static refArrayOop cache(InstanceKlass *k);
1856 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1857 };
1858
1859 class java_lang_Byte_ByteCache : AllStatic {
1860 private:
1861 static int _static_cache_offset;
1862 public:
1863 static Symbol* symbol();
1864 static void compute_offsets(InstanceKlass* k);
1865 static refArrayOop cache(InstanceKlass *k);
1866 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
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 InstanceKlass* 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