1 /*
2 * Copyright (c) 1997, 2025, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_CLASSFILE_JAVACLASSES_HPP
26 #define SHARE_CLASSFILE_JAVACLASSES_HPP
27
28 #include "classfile/vmClasses.hpp"
29 #include "oops/instanceKlass.hpp"
30 #include "oops/oopsHierarchy.hpp"
31 #include "oops/symbol.hpp"
32 #include "runtime/handles.hpp"
33 #include "runtime/os.hpp"
34 #include "utilities/macros.hpp"
35 #include "utilities/utf8.hpp"
36 #include "utilities/vmEnums.hpp"
37
38 class JvmtiThreadState;
39 class RecordComponent;
40 class SerializeClosure;
41 class ObjectWaiter;
42 class ObjectMonitor;
43
44 #define CHECK_INIT(offset) assert(offset != 0, "should be initialized"); return offset;
45
46 // Interface to java.lang.Object objects
47
48 class java_lang_Object : AllStatic {
49 public:
50 static void register_natives(TRAPS);
51 };
52
53 // Interface to java.lang.String objects
54
55 // The flags field is a collection of bits representing boolean values used
56 // internally by the VM.
57 #define STRING_INJECTED_FIELDS(macro) \
58 macro(java_lang_String, flags, byte_signature, false)
59
60 class java_lang_String : AllStatic {
61 private:
62 static int _value_offset;
63 static int _hash_offset;
64 static int _hashIsZero_offset;
65 static int _coder_offset;
66 static int _flags_offset;
67
68 static bool _initialized;
69
70 static Handle basic_create(int length, bool byte_arr, TRAPS);
71
72 static inline void set_coder(oop string, jbyte coder);
73
74 // Bitmasks for values in the injected flags field.
75 static const uint8_t _deduplication_forbidden_mask = 1 << 0;
76 static const uint8_t _deduplication_requested_mask = 1 << 1;
77
78 static int flags_offset() { CHECK_INIT(_flags_offset); }
79 // Return the address of the injected flags field.
80 static inline uint8_t* flags_addr(oop java_string);
81 // Test whether the designated bit of the injected flags field is set.
82 static inline bool is_flag_set(oop java_string, uint8_t flag_mask);
83 // Atomically test and set the designated bit of the injected flags field,
84 // returning true if the bit was already set.
85 static bool test_and_set_flag(oop java_string, uint8_t flag_mask);
86
87 static inline unsigned int hash_code_impl(oop java_string, bool update);
88
89 public:
90
91 // Coders
92 enum Coder {
93 CODER_LATIN1 = 0,
94 CODER_UTF16 = 1
95 };
96
97 static void compute_offsets();
98 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
99
100 // Instance creation
101 static Handle create_from_unicode(const jchar* unicode, int len, TRAPS);
102 static oop create_oop_from_unicode(const jchar* unicode, int len, TRAPS);
103 static Handle create_from_str(const char* utf8_str, TRAPS);
104 static oop create_oop_from_str(const char* utf8_str, TRAPS);
105 static Handle create_from_symbol(const Symbol* symbol, TRAPS);
106 static Handle create_from_platform_dependent_str(const char* str, TRAPS);
107
108 static void set_compact_strings(bool value);
109
110 static int value_offset() { CHECK_INIT(_value_offset); }
111 static int coder_offset() { CHECK_INIT(_coder_offset); }
112
113 static inline void set_value(oop string, typeArrayOop buffer);
114
115 // Set the deduplication_forbidden flag true. This flag is sticky; once
116 // set it never gets cleared. This is set when a String is interned in
117 // the StringTable, to prevent string deduplication from changing the
118 // String's value array.
119 static inline void set_deduplication_forbidden(oop java_string);
120
121 // Test and set the deduplication_requested flag. Returns the old value
122 // of the flag. This flag is sticky; once set it never gets cleared.
123 // Some GCs may use this flag when deciding whether to request
124 // deduplication of a String, to avoid multiple requests for the same
125 // object.
126 static inline bool test_and_set_deduplication_requested(oop java_string);
127
128 // Accessors
129 static inline typeArrayOop value(oop java_string);
130 static inline typeArrayOop value_no_keepalive(oop java_string);
131 static inline bool hash_is_set(oop string);
132 static inline bool is_latin1(oop java_string);
133 static inline bool deduplication_forbidden(oop java_string);
134 static inline bool deduplication_requested(oop java_string);
135 static inline int length(oop java_string);
136 static inline int length(oop java_string, typeArrayOop string_value);
137 static size_t utf8_length(oop java_string);
138 static size_t utf8_length(oop java_string, typeArrayOop string_value);
139 // Legacy variants that truncate the length if needed
140 static int utf8_length_as_int(oop java_string);
141 static int utf8_length_as_int(oop java_string, typeArrayOop string_value);
142
143 // String converters
144 static char* as_utf8_string(oop java_string);
145 // `length` is set to the length of the utf8 sequence.
146 static char* as_utf8_string(oop java_string, size_t& length);
147 static char* as_utf8_string_full(oop java_string, char* buf, size_t buflen, size_t& length);
148 static char* as_utf8_string(oop java_string, char* buf, size_t buflen);
149 static char* as_utf8_string(oop java_string, int start, int len);
150 static char* as_utf8_string(oop java_string, typeArrayOop value, char* buf, size_t buflen);
151 static char* as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, size_t buflen);
152 static char* as_platform_dependent_str(Handle java_string, TRAPS);
153 static jchar* as_unicode_string(oop java_string, int& length, TRAPS);
154 static jchar* as_unicode_string_or_null(oop java_string, int& length);
155 // produce an ascii string with all other values quoted using \u####
156 static char* as_quoted_ascii(oop java_string);
157
158 // Compute the hash value for a java.lang.String object which would
159 // contain the characters passed in.
160 //
161 // As the hash value used by the String object itself, in
162 // String.hashCode(). This value is normally calculated in Java code
163 // in the String.hashCode method(), but is precomputed for String
164 // objects in the shared archive file.
165 // hash P(31) from Kernighan & Ritchie
166 //
167 // For this reason, THIS ALGORITHM MUST MATCH String.hashCode().
168 static unsigned int hash_code(const jchar* s, int len) {
169 unsigned int h = 0;
170 while (len-- > 0) {
171 h = 31*h + (unsigned int) *s;
172 s++;
173 }
174 return h;
175 }
176
177 static unsigned int hash_code(const jbyte* s, int len) {
178 unsigned int h = 0;
179 while (len-- > 0) {
180 h = 31*h + (((unsigned int) *s) & 0xFF);
181 s++;
182 }
183 return h;
184 }
185
186 static unsigned int hash_code(const char* utf8_str, size_t utf8_len) {
187 unsigned int h = 0;
188 int unicode_length = UTF8::unicode_length(utf8_str, utf8_len);
189
190 jchar c;
191 while (unicode_length-- > 0) {
192 utf8_str = UTF8::next(utf8_str, &c);
193 h = 31 * h + ((unsigned int)c);
194 }
195 return h;
196 }
197
198 static unsigned int hash_code(oop java_string);
199 static unsigned int hash_code_noupdate(oop java_string);
200
201 // Compare strings (of different types/encodings), length is the string (array) length
202 static bool equals(oop java_string, const jchar* chars, int len);
203 static bool equals(oop java_string, const char* utf8_str, size_t utf8_len);
204 static bool equals(oop str1, oop str2);
205 static inline bool value_equals(typeArrayOop str_value1, typeArrayOop str_value2);
206
207 // Conversion between '.' and '/' formats, and allocate a String from the result.
208 static Handle externalize_classname(Symbol* java_name, TRAPS);
209
210 // Conversion
211 static Symbol* as_symbol(oop java_string);
212 static Symbol* as_symbol_or_null(oop java_string);
213
214 // Tester
215 static inline bool is_instance(oop obj);
216
217 // Debugging
218 static void print(oop java_string, outputStream* st, int max_length = MaxStringPrintSize);
219 friend class JavaClasses;
220 friend class StringTable;
221 };
222
223
224 // Interface to java.lang.Class objects
225
226 #define CLASS_INJECTED_FIELDS(macro) \
227 macro(java_lang_Class, klass, intptr_signature, false) \
228 macro(java_lang_Class, array_klass, intptr_signature, false) \
229 macro(java_lang_Class, oop_size, int_signature, false) \
230 macro(java_lang_Class, static_oop_field_count, int_signature, false) \
231 macro(java_lang_Class, source_file, object_signature, false) \
232 macro(java_lang_Class, init_lock, object_signature, false)
233
234 class java_lang_Class : AllStatic {
235 friend class VMStructs;
236 friend class JVMCIVMStructs;
237 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 static int reflection_data_offset() { return _reflectionData_offset; }
339
340 static oop class_loader(oop java_class);
341 static void set_module(oop java_class, oop module);
342 static oop module(oop java_class);
343
344 static oop name(Handle java_class, TRAPS);
345
346 static oop source_file(oop java_class);
347 static void set_source_file(oop java_class, oop source_file);
348
349 static int modifiers(oop java_class);
350
351 static size_t oop_size(oop java_class);
352 static void set_oop_size(HeapWord* java_class, size_t size);
353 static int static_oop_field_count(oop java_class);
354 static void set_static_oop_field_count(oop java_class, int size);
355
356 static GrowableArray<Klass*>* fixup_mirror_list() {
357 return _fixup_mirror_list;
358 }
359 static void set_fixup_mirror_list(GrowableArray<Klass*>* v) {
360 _fixup_mirror_list = v;
361 }
362
363 static GrowableArray<Klass*>* fixup_module_field_list() {
364 return _fixup_module_field_list;
365 }
366 static void set_fixup_module_field_list(GrowableArray<Klass*>* v) {
367 _fixup_module_field_list = v;
368 }
369
370 // Debugging
371 friend class JavaClasses;
372 };
373
374 // Interface to java.lang.Thread objects
375
376 #define THREAD_INJECTED_FIELDS(macro) \
377 macro(java_lang_Thread, jvmti_thread_state, intptr_signature, false) \
378 macro(java_lang_Thread, vthread_transition_disable_count, int_signature, false) \
379 macro(java_lang_Thread, is_in_vthread_transition, bool_signature, false) \
380 JFR_ONLY(macro(java_lang_Thread, jfr_epoch, short_signature, false))
381
382 class java_lang_Thread : AllStatic {
383 friend class java_lang_VirtualThread;
384 friend class JVMCIVMStructs;
385 private:
386 // Note that for this class the layout changed between JDK1.2 and JDK1.3,
387 // so we compute the offsets at startup rather than hard-wiring them.
388 static int _holder_offset;
389 static int _name_offset;
390 static int _contextClassLoader_offset;
391 static int _eetop_offset;
392 static int _jvmti_thread_state_offset;
393 static int _vthread_transition_disable_count_offset;
394 static int _is_in_vthread_transition_offset;
395 static int _interrupted_offset;
396 static int _interruptLock_offset;
397 static int _tid_offset;
398 static int _continuation_offset;
399 static int _park_blocker_offset;
400 static int _scopedValueBindings_offset;
401 JFR_ONLY(static int _jfr_epoch_offset;)
402
403 static void compute_offsets();
404
405 public:
406 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
407
408 // Returns the JavaThread associated with the thread obj
409 static JavaThread* thread(oop java_thread);
410 static JavaThread* thread_acquire(oop java_thread);
411 // Set JavaThread for instance
412 static void set_thread(oop java_thread, JavaThread* thread);
413 static void release_set_thread(oop java_thread, JavaThread* thread);
414 // FieldHolder
415 static oop holder(oop java_thread);
416 // interruptLock
417 static oop interrupt_lock(oop java_thread);
418 // Interrupted status
419 static bool interrupted(oop java_thread);
420 static void set_interrupted(oop java_thread, bool val);
421 // Name
422 static oop name(oop java_thread);
423 static void set_name(oop java_thread, oop name);
424 // Priority
425 static ThreadPriority priority(oop java_thread);
426 static void set_priority(oop java_thread, ThreadPriority priority);
427 // Thread group
428 static oop threadGroup(oop java_thread);
429 // Alive (NOTE: this is not really a field, but provides the correct
430 // definition without doing a Java call)
431 static bool is_alive(oop java_thread);
432 // Daemon
433 static bool is_daemon(oop java_thread);
434 static void set_daemon(oop java_thread);
435 // Context ClassLoader
436 static oop context_class_loader(oop java_thread);
437 // Stack size hint
438 static jlong stackSize(oop java_thread);
439 // Thread ID
440 static int64_t thread_id(oop java_thread);
441 static ByteSize thread_id_offset();
442 // Continuation
443 static inline oop continuation(oop java_thread);
444
445 static JvmtiThreadState* jvmti_thread_state(oop java_thread);
446 static void set_jvmti_thread_state(oop java_thread, JvmtiThreadState* state);
447
448 static int vthread_transition_disable_count(oop java_thread);
449 static void inc_vthread_transition_disable_count(oop java_thread);
450 static void dec_vthread_transition_disable_count(oop java_thread);
451 static int vthread_transition_disable_count_offset() { return _vthread_transition_disable_count_offset; }
452
453 static bool is_in_vthread_transition(oop java_thread);
454 static void set_is_in_vthread_transition(oop java_thread, bool val);
455 static int is_in_vthread_transition_offset() { return _is_in_vthread_transition_offset; }
456
457 // Clear all scoped value bindings on error
458 static void clear_scopedValueBindings(oop java_thread);
459
460 // Blocker object responsible for thread parking
461 static oop park_blocker(oop java_thread);
462
463 // Write thread status info to threadStatus field of java.lang.Thread.
464 static void set_thread_status(oop java_thread_oop, JavaThreadStatus status);
465 // Read thread status info from threadStatus field of java.lang.Thread.
466 static JavaThreadStatus get_thread_status(oop java_thread_oop);
467
468 static const char* thread_status_name(oop java_thread_oop);
469
470 JFR_ONLY(static u2 jfr_epoch(oop java_thread);)
471 JFR_ONLY(static void set_jfr_epoch(oop java_thread, u2 epoch);)
472 JFR_ONLY(static int jfr_epoch_offset() { CHECK_INIT(_jfr_epoch_offset); })
473
474 // Debugging
475 friend class JavaClasses;
476 };
477
478 // Interface to java.lang.Thread$FieldHolder objects
479
480 class java_lang_Thread_FieldHolder : AllStatic {
481 private:
482 static int _group_offset;
483 static int _priority_offset;
484 static int _stackSize_offset;
485 static int _daemon_offset;
486 static int _thread_status_offset;
487
488 static void compute_offsets();
489
490 public:
491 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
492
493 static oop threadGroup(oop holder);
494
495 static ThreadPriority priority(oop holder);
496 static void set_priority(oop holder, ThreadPriority priority);
497
498 static jlong stackSize(oop holder);
499
500 static bool is_daemon(oop holder);
501 static void set_daemon(oop holder, bool val);
502
503 static void set_thread_status(oop holder, JavaThreadStatus status);
504 static JavaThreadStatus get_thread_status(oop holder);
505
506 friend class JavaClasses;
507 };
508
509 // Interface to java.lang.Thread$Constants objects
510
511 class java_lang_Thread_Constants : AllStatic {
512 private:
513 static int _static_VTHREAD_GROUP_offset;
514 static int _static_NOT_SUPPORTED_CLASSLOADER_offset;
515
516 static void compute_offsets();
517 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
518
519 public:
520 static oop get_VTHREAD_GROUP();
521
522 friend class JavaClasses;
523 };
524
525 // Interface to java.lang.ThreadGroup objects
526
527 class java_lang_ThreadGroup : AllStatic {
528 private:
529 static int _parent_offset;
530 static int _name_offset;
531 static int _maxPriority_offset;
532 static int _daemon_offset;
533
534 static void compute_offsets();
535 public:
536 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
537
538 // parent ThreadGroup
539 static oop parent(oop java_thread_group);
540 // name
541 static const char* name(oop java_thread_group);
542 // maxPriority in group
543 static ThreadPriority maxPriority(oop java_thread_group);
544 // Daemon
545 static bool is_daemon(oop java_thread_group);
546
547 // Debugging
548 friend class JavaClasses;
549 };
550
551
552 // Interface to java.lang.VirtualThread objects
553 #define VTHREAD_INJECTED_FIELDS(macro) \
554 macro(java_lang_VirtualThread, objectWaiter, intptr_signature, false)
555
556 class java_lang_VirtualThread : AllStatic {
557 private:
558 static int static_vthread_scope_offset;
559 static int _carrierThread_offset;
560 static int _continuation_offset;
561 static int _state_offset;
562 static int _next_offset;
563 static int _onWaitingList_offset;
564 static int _notified_offset;
565 static int _interruptible_wait_offset;
566 static int _recheckInterval_offset;
567 static int _timeout_offset;
568 static int _objectWaiter_offset;
569 JFR_ONLY(static int _jfr_epoch_offset;)
570 public:
571 enum {
572 NEW = 0,
573 STARTED = 1,
574 RUNNING = 2,
575 PARKING = 3,
576 PARKED = 4,
577 PINNED = 5,
578 TIMED_PARKING = 6,
579 TIMED_PARKED = 7,
580 TIMED_PINNED = 8,
581 UNPARKED = 9,
582 YIELDING = 10,
583 YIELDED = 11,
584 BLOCKING = 12,
585 BLOCKED = 13,
586 UNBLOCKED = 14,
587 WAITING = 15,
588 WAIT = 16, // waiting in Object.wait
589 TIMED_WAITING = 17,
590 TIMED_WAIT = 18, // waiting in timed-Object.wait
591 TERMINATED = 99,
592
593 // additional state bits
594 SUSPENDED = 1 << 8, // suspended when unmounted
595 };
596
597 static void compute_offsets();
598 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
599
600 // Testers
601 static bool is_subclass(Klass* klass) {
602 return klass->is_subclass_of(vmClasses::VirtualThread_klass());
603 }
604 static bool is_instance(oop obj);
605
606 static oop vthread_scope();
607 static oop carrier_thread(oop vthread);
608 static oop continuation(oop vthread);
609 static int state(oop vthread);
610 static void set_state(oop vthread, int state);
611 static int cmpxchg_state(oop vthread, int old_state, int new_state);
612 static oop next(oop vthread);
613 static void set_next(oop vthread, oop next_vthread);
614 static bool set_onWaitingList(oop vthread, OopHandle& list_head);
615 static jlong timeout(oop vthread);
616 static void set_timeout(oop vthread, jlong value);
617 static void set_notified(oop vthread, jboolean value);
618 static void set_interruptible_wait(oop vthread, jboolean value);
619 static bool is_preempted(oop vthread);
620 static JavaThreadStatus map_state_to_thread_status(int state);
621
622 static inline ObjectWaiter* objectWaiter(oop vthread);
623 static inline void set_objectWaiter(oop vthread, ObjectWaiter* waiter);
624 static ObjectMonitor* current_pending_monitor(oop vthread);
625 static ObjectMonitor* current_waiting_monitor(oop vthread);
626 };
627
628
629 // Interface to java.lang.Throwable objects
630
631 class java_lang_Throwable: AllStatic {
632 friend class BacktraceBuilder;
633 friend class BacktraceIterator;
634
635 private:
636 // Trace constants
637 enum {
638 trace_methods_offset = 0,
639 trace_bcis_offset = 1,
640 trace_mirrors_offset = 2,
641 trace_names_offset = 3,
642 trace_conts_offset = 4,
643 trace_next_offset = 5,
644 trace_hidden_offset = 6,
645 trace_size = 7,
646 trace_chunk_size = 32
647 };
648
649 static int _backtrace_offset;
650 static int _detailMessage_offset;
651 static int _stackTrace_offset;
652 static int _depth_offset;
653 static int _cause_offset;
654 static int _static_unassigned_stacktrace_offset;
655
656 // StackTrace (programmatic access, new since 1.4)
657 static void clear_stacktrace(oop throwable);
658 // Stacktrace (post JDK 1.7.0 to allow immutability protocol to be followed)
659 static void set_stacktrace(oop throwable, oop st_element_array);
660 static oop unassigned_stacktrace();
661
662 public:
663 // Backtrace
664 static oop backtrace(oop throwable);
665 static void set_backtrace(oop throwable, oop value);
666 static int depth(oop throwable);
667 static void set_depth(oop throwable, int value);
668 // Message
669 static int get_detailMessage_offset() { CHECK_INIT(_detailMessage_offset); }
670 static oop message(oop throwable);
671 static const char* message_as_utf8(oop throwable);
672 static void set_message(oop throwable, oop value);
673
674 static oop cause(oop throwable);
675
676 static void print_stack_element(outputStream *st, Method* method, int bci);
677
678 static void compute_offsets();
679 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
680
681 // Allocate space for backtrace (created but stack trace not filled in)
682 static void allocate_backtrace(Handle throwable, TRAPS);
683 // Fill in current stack trace for throwable with preallocated backtrace (no GC)
684 static void fill_in_stack_trace_of_preallocated_backtrace(Handle throwable);
685 // Fill in current stack trace, can cause GC
686 static void fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS);
687 static void fill_in_stack_trace(Handle throwable, const methodHandle& method = methodHandle());
688
689 // Programmatic access to stack trace
690 static void get_stack_trace_elements(int depth, Handle backtrace, objArrayHandle stack_trace, TRAPS);
691
692 // For recreating class initialization error exceptions.
693 static Handle create_initialization_error(JavaThread* current, Handle throwable);
694
695 // Printing
696 static void print(oop throwable, outputStream* st);
697 static void print_stack_trace(Handle throwable, outputStream* st);
698 static void java_printStackTrace(Handle throwable, TRAPS);
699 // Debugging
700 friend class JavaClasses;
701 // Gets the method and bci of the top frame (TOS). Returns false if this failed.
702 static bool get_top_method_and_bci(oop throwable, Method** method, int* bci);
703 };
704
705
706 // Interface to java.lang.reflect.AccessibleObject objects
707
708 class java_lang_reflect_AccessibleObject: AllStatic {
709 private:
710 // Note that to reduce dependencies on the JDK we compute these
711 // offsets at run-time.
712 static int _override_offset;
713
714 static void compute_offsets();
715
716 public:
717 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
718
719 // Accessors
720 static jboolean override(oop reflect);
721 static void set_override(oop reflect, jboolean value);
722
723 // Debugging
724 friend class JavaClasses;
725 };
726
727
728 // Interface to java.lang.reflect.Method objects
729
730 class java_lang_reflect_Method : public java_lang_reflect_AccessibleObject {
731 private:
732 // Note that to reduce dependencies on the JDK we compute these
733 // offsets at run-time.
734 static int _clazz_offset;
735 static int _name_offset;
736 static int _returnType_offset;
737 static int _parameterTypes_offset;
738 static int _exceptionTypes_offset;
739 static int _slot_offset;
740 static int _modifiers_offset;
741 static int _signature_offset;
742 static int _annotations_offset;
743 static int _parameter_annotations_offset;
744 static int _annotation_default_offset;
745
746 static void compute_offsets();
747 public:
748 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
749
750 // Allocation
751 static Handle create(TRAPS);
752
753 // Accessors
754 static oop clazz(oop reflect);
755 static void set_clazz(oop reflect, oop value);
756
757 static void set_name(oop method, oop value);
758
759 static oop return_type(oop method);
760 static void set_return_type(oop method, oop value);
761
762 static oop parameter_types(oop method);
763 static void set_parameter_types(oop method, oop value);
764
765 static int slot(oop reflect);
766 static void set_slot(oop reflect, int value);
767
768 static void set_exception_types(oop method, oop value);
769 static void set_modifiers(oop method, int value);
770 static void set_signature(oop method, oop value);
771 static void set_annotations(oop method, oop value);
772 static void set_parameter_annotations(oop method, oop value);
773 static void set_annotation_default(oop method, oop value);
774
775 // Debugging
776 friend class JavaClasses;
777 };
778
779
780 // Interface to java.lang.reflect.Constructor objects
781
782 class java_lang_reflect_Constructor : public java_lang_reflect_AccessibleObject {
783 private:
784 // Note that to reduce dependencies on the JDK we compute these
785 // offsets at run-time.
786 static int _clazz_offset;
787 static int _parameterTypes_offset;
788 static int _exceptionTypes_offset;
789 static int _slot_offset;
790 static int _modifiers_offset;
791 static int _signature_offset;
792 static int _annotations_offset;
793 static int _parameter_annotations_offset;
794
795 static void compute_offsets();
796 public:
797 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
798
799 // Allocation
800 static Handle create(TRAPS);
801
802 // Accessors
803 static oop clazz(oop reflect);
804 static void set_clazz(oop reflect, oop value);
805
806 static oop parameter_types(oop constructor);
807 static void set_parameter_types(oop constructor, oop value);
808
809 static int slot(oop reflect);
810 static void set_slot(oop reflect, int value);
811
812 static void set_exception_types(oop constructor, oop value);
813 static void set_modifiers(oop constructor, int value);
814 static void set_signature(oop constructor, oop value);
815 static void set_annotations(oop constructor, oop value);
816 static void set_parameter_annotations(oop method, oop value);
817
818 // Debugging
819 friend class JavaClasses;
820 };
821
822
823 // Interface to java.lang.reflect.Field objects
824
825 class java_lang_reflect_Field : public java_lang_reflect_AccessibleObject {
826 private:
827 // Note that to reduce dependencies on the JDK we compute these
828 // offsets at run-time.
829 static int _clazz_offset;
830 static int _name_offset;
831 static int _type_offset;
832 static int _slot_offset;
833 static int _modifiers_offset;
834 static int _trusted_final_offset;
835 static int _signature_offset;
836 static int _annotations_offset;
837
838 static void compute_offsets();
839
840 public:
841 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
842
843 // Allocation
844 static Handle create(TRAPS);
845
846 // Accessors
847 static oop clazz(oop reflect);
848 static void set_clazz(oop reflect, oop value);
849
850 static oop name(oop field);
851 static void set_name(oop field, oop value);
852
853 static oop type(oop field);
854 static void set_type(oop field, oop value);
855
856 static int slot(oop reflect);
857 static void set_slot(oop reflect, int value);
858
859 static int modifiers(oop field);
860 static void set_modifiers(oop field, int value);
861
862 static void set_trusted_final(oop field);
863
864 static void set_signature(oop constructor, oop value);
865 static void set_annotations(oop constructor, oop value);
866
867 // Debugging
868 friend class JavaClasses;
869 };
870
871 class java_lang_reflect_Parameter {
872 private:
873 // Note that to reduce dependencies on the JDK we compute these
874 // offsets at run-time.
875 static int _name_offset;
876 static int _modifiers_offset;
877 static int _index_offset;
878 static int _executable_offset;
879
880 static void compute_offsets();
881
882 public:
883 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
884
885 // Allocation
886 static Handle create(TRAPS);
887
888 // Accessors
889 static oop name(oop field);
890 static void set_name(oop field, oop value);
891
892 static int index(oop reflect);
893 static void set_index(oop reflect, int value);
894
895 static int modifiers(oop reflect);
896 static void set_modifiers(oop reflect, int value);
897
898 static oop executable(oop constructor);
899 static void set_executable(oop constructor, oop value);
900
901 friend class JavaClasses;
902 };
903
904 #define MODULE_INJECTED_FIELDS(macro) \
905 macro(java_lang_Module, module_entry, intptr_signature, false)
906
907 class java_lang_Module {
908 private:
909 static int _loader_offset;
910 static int _name_offset;
911 static int _module_entry_offset;
912
913 static void compute_offsets();
914
915 public:
916 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
917
918 // Allocation
919 static Handle create(Handle loader, Handle module_name, TRAPS);
920
921 // Testers
922 static bool is_instance(oop obj);
923
924 // Accessors
925 static oop loader(oop module);
926 static void set_loader(oop module, oop value);
927
928 // CDS
929 static int module_entry_offset() { return _module_entry_offset; }
930
931 static oop name(oop module);
932 static void set_name(oop module, oop value);
933
934 static ModuleEntry* module_entry(oop module);
935 static ModuleEntry* module_entry_raw(oop module);
936 static void set_module_entry(oop module, ModuleEntry* module_entry);
937
938 friend class JavaClasses;
939 };
940
941 #define CONSTANTPOOL_INJECTED_FIELDS(macro) \
942 macro(reflect_ConstantPool, vmholder, object_signature, false)
943
944 // Interface to jdk.internal.reflect.ConstantPool objects
945 class reflect_ConstantPool {
946 private:
947 // Note that to reduce dependencies on the JDK we compute these
948 // offsets at run-time. This field is the oop offset for the
949 // actual constant pool, previously called constantPoolOop.
950 static int _vmholder_offset;
951
952 static void compute_offsets();
953
954 public:
955 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
956
957 // Allocation
958 static Handle create(TRAPS);
959
960 // Accessors
961 static void set_cp(oop reflect, ConstantPool* value);
962
963 static ConstantPool* get_cp(oop reflect);
964
965 // Debugging
966 friend class JavaClasses;
967 };
968
969
970 // Interface to java.lang primitive type boxing objects:
971 // - java.lang.Boolean
972 // - java.lang.Character
973 // - java.lang.Float
974 // - java.lang.Double
975 // - java.lang.Byte
976 // - java.lang.Short
977 // - java.lang.Integer
978 // - java.lang.Long
979
980 // This could be separated out into 8 individual classes.
981
982 class java_lang_boxing_object: AllStatic {
983 private:
984 static int _value_offset;
985 static int _long_value_offset;
986
987 static void compute_offsets();
988 static oop initialize_and_allocate(BasicType type, TRAPS);
989 public:
990 // Allocation. Returns a boxed value, or null for invalid type.
991 static oop create(BasicType type, jvalue* value, TRAPS);
992 // Accessors. Returns the basic type being boxed, or T_ILLEGAL for invalid oop.
993 static BasicType get_value(oop box, jvalue* value);
994 static BasicType set_value(oop box, jvalue* value);
995 static BasicType basic_type(oop box);
996 static bool is_instance(oop box) { return basic_type(box) != T_ILLEGAL; }
997 static bool is_instance(oop box, BasicType type) { return basic_type(box) == type; }
998 static void print(oop box, outputStream* st) { jvalue value; print(get_value(box, &value), &value, st); }
999 static void print(BasicType type, jvalue* value, outputStream* st);
1000
1001 static int value_offset(BasicType type) {
1002 return is_double_word_type(type) ? _long_value_offset : _value_offset;
1003 }
1004
1005 static void serialize_offsets(SerializeClosure* f);
1006
1007 // Debugging
1008 friend class JavaClasses;
1009 };
1010
1011
1012
1013 // Interface to java.lang.ref.Reference objects
1014
1015 class java_lang_ref_Reference: AllStatic {
1016 static int _referent_offset;
1017 static int _queue_offset;
1018 static int _next_offset;
1019 static int _discovered_offset;
1020
1021 static bool _offsets_initialized;
1022
1023 public:
1024 // Accessors
1025 static inline oop weak_referent_no_keepalive(oop ref);
1026 static inline oop weak_referent(oop ref);
1027 static inline oop phantom_referent_no_keepalive(oop ref);
1028 static inline oop unknown_referent_no_keepalive(oop ref);
1029 static inline void clear_referent(oop ref);
1030 static inline void clear_referent_raw(oop ref);
1031 static inline HeapWord* referent_addr_raw(oop ref);
1032 static inline oop next(oop ref);
1033 static inline void set_next(oop ref, oop value);
1034 static inline void set_next_raw(oop ref, oop value);
1035 static inline HeapWord* next_addr_raw(oop ref);
1036 static inline oop discovered(oop ref);
1037 static inline void set_discovered(oop ref, oop value);
1038 static inline void set_discovered_raw(oop ref, oop value);
1039 static inline HeapWord* discovered_addr_raw(oop ref);
1040 static bool is_referent_field(oop obj, ptrdiff_t offset);
1041 static inline bool is_final(oop ref);
1042 static inline bool is_phantom(oop ref);
1043 static inline bool is_weak(oop ref);
1044 static inline bool is_soft(oop ref);
1045
1046 static int referent_offset() { CHECK_INIT(_referent_offset); }
1047 static int queue_offset() { CHECK_INIT(_queue_offset); }
1048 static int next_offset() { CHECK_INIT(_next_offset); }
1049 static int discovered_offset() { CHECK_INIT(_discovered_offset); }
1050
1051 static void compute_offsets();
1052 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1053 };
1054
1055
1056 // Interface to java.lang.ref.SoftReference objects
1057
1058 class java_lang_ref_SoftReference: public java_lang_ref_Reference {
1059 static int _timestamp_offset;
1060 static int _static_clock_offset;
1061
1062 public:
1063 // Accessors
1064 static jlong timestamp(oop ref);
1065
1066 // Accessors for statics
1067 static jlong clock();
1068 static void set_clock(jlong value);
1069
1070 static void compute_offsets();
1071 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1072 };
1073
1074 // Interface to java.lang.invoke.MethodHandle objects
1075
1076 class java_lang_invoke_MethodHandle: AllStatic {
1077 friend class JavaClasses;
1078
1079 private:
1080 static int _type_offset; // the MethodType of this MH
1081 static int _form_offset; // the LambdaForm of this MH
1082
1083 static void compute_offsets();
1084
1085 public:
1086 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1087
1088 // Accessors
1089 static oop type(oop mh);
1090 static void set_type(oop mh, oop mtype);
1091
1092 static oop form(oop mh);
1093 static void set_form(oop mh, oop lform);
1094
1095 // Testers
1096 static bool is_subclass(Klass* klass) {
1097 return klass->is_subclass_of(vmClasses::MethodHandle_klass());
1098 }
1099 static bool is_instance(oop obj);
1100
1101 // Accessors for code generation:
1102 static int type_offset() { CHECK_INIT(_type_offset); }
1103 static int form_offset() { CHECK_INIT(_form_offset); }
1104 };
1105
1106 // Interface to java.lang.invoke.DirectMethodHandle objects
1107
1108 class java_lang_invoke_DirectMethodHandle: AllStatic {
1109 friend class JavaClasses;
1110
1111 private:
1112 static int _member_offset; // the MemberName of this DMH
1113
1114 static void compute_offsets();
1115
1116 public:
1117 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1118
1119 // Accessors
1120 static oop member(oop mh);
1121
1122 // Testers
1123 static bool is_subclass(Klass* klass) {
1124 return klass->is_subclass_of(vmClasses::DirectMethodHandle_klass());
1125 }
1126 static bool is_instance(oop obj);
1127
1128 // Accessors for code generation:
1129 static int member_offset() { CHECK_INIT(_member_offset); }
1130 };
1131
1132 // Interface to java.lang.invoke.LambdaForm objects
1133 // (These are a private interface for managing adapter code generation.)
1134
1135 class java_lang_invoke_LambdaForm: AllStatic {
1136 friend class JavaClasses;
1137
1138 private:
1139 static int _vmentry_offset; // type is MemberName
1140
1141 static void compute_offsets();
1142
1143 public:
1144 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1145
1146 // Accessors
1147 static oop vmentry(oop lform);
1148
1149 // Testers
1150 static bool is_subclass(Klass* klass) {
1151 return vmClasses::LambdaForm_klass() != nullptr &&
1152 klass->is_subclass_of(vmClasses::LambdaForm_klass());
1153 }
1154 static bool is_instance(oop obj);
1155
1156 // Accessors for code generation:
1157 static int vmentry_offset() { CHECK_INIT(_vmentry_offset); }
1158 };
1159
1160 // Interface to java.lang.invoke.NativeEntryPoint objects
1161 // (These are a private interface for managing adapter code generation.)
1162
1163 class jdk_internal_foreign_abi_NativeEntryPoint: AllStatic {
1164 friend class JavaClasses;
1165
1166 private:
1167 static int _method_type_offset;
1168 static int _downcall_stub_address_offset;
1169
1170 static void compute_offsets();
1171
1172 public:
1173 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1174
1175 // Accessors
1176 static oop method_type(oop entry);
1177 static jlong downcall_stub_address(oop entry);
1178
1179 // Testers
1180 static bool is_subclass(Klass* klass) {
1181 return vmClasses::NativeEntryPoint_klass() != nullptr &&
1182 klass->is_subclass_of(vmClasses::NativeEntryPoint_klass());
1183 }
1184 static bool is_instance(oop obj);
1185
1186 // Accessors for code generation:
1187 static int method_type_offset_in_bytes() { return _method_type_offset; }
1188 static int downcall_stub_address_offset_in_bytes() { return _downcall_stub_address_offset; }
1189 };
1190
1191 class jdk_internal_foreign_abi_ABIDescriptor: AllStatic {
1192 friend class JavaClasses;
1193
1194 private:
1195 static int _inputStorage_offset;
1196 static int _outputStorage_offset;
1197 static int _volatileStorage_offset;
1198 static int _stackAlignment_offset;
1199 static int _shadowSpace_offset;
1200 static int _scratch1_offset;
1201 static int _scratch2_offset;
1202
1203 static void compute_offsets();
1204
1205 public:
1206 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1207
1208 // Accessors
1209 static objArrayOop inputStorage(oop entry);
1210 static objArrayOop outputStorage(oop entry);
1211 static objArrayOop volatileStorage(oop entry);
1212 static jint stackAlignment(oop entry);
1213 static jint shadowSpace(oop entry);
1214 static oop scratch1(oop entry);
1215 static oop scratch2(oop entry);
1216
1217 // Testers
1218 static bool is_subclass(Klass* klass) {
1219 return vmClasses::ABIDescriptor_klass() != nullptr &&
1220 klass->is_subclass_of(vmClasses::ABIDescriptor_klass());
1221 }
1222 static bool is_instance(oop obj);
1223 };
1224
1225 class jdk_internal_foreign_abi_VMStorage: AllStatic {
1226 friend class JavaClasses;
1227
1228 private:
1229 static int _type_offset;
1230 static int _indexOrOffset_offset;
1231 static int _segmentMaskOrSize_offset;
1232 static int _debugName_offset;
1233
1234 static void compute_offsets();
1235
1236 public:
1237 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1238
1239 // Accessors
1240 static jbyte type(oop entry);
1241 static jint index_or_offset(oop entry);
1242 static jshort segment_mask_or_size(oop entry);
1243 static oop debugName(oop entry);
1244
1245 // Testers
1246 static bool is_subclass(Klass* klass) {
1247 return vmClasses::VMStorage_klass() != nullptr &&
1248 klass->is_subclass_of(vmClasses::VMStorage_klass());
1249 }
1250 static bool is_instance(oop obj);
1251 };
1252
1253 class jdk_internal_foreign_abi_CallConv: AllStatic {
1254 friend class JavaClasses;
1255
1256 private:
1257 static int _argRegs_offset;
1258 static int _retRegs_offset;
1259
1260 static void compute_offsets();
1261
1262 public:
1263 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1264
1265 // Accessors
1266 static objArrayOop argRegs(oop entry);
1267 static objArrayOop retRegs(oop entry);
1268
1269 // Testers
1270 static bool is_subclass(Klass* klass) {
1271 return vmClasses::CallConv_klass() != nullptr &&
1272 klass->is_subclass_of(vmClasses::CallConv_klass());
1273 }
1274 static bool is_instance(oop obj);
1275 };
1276
1277 // Interface to java.lang.invoke.MemberName objects
1278 // (These are a private interface for Java code to query the class hierarchy.)
1279
1280 #define RESOLVEDMETHOD_INJECTED_FIELDS(macro) \
1281 macro(java_lang_invoke_ResolvedMethodName, vmtarget, intptr_signature, false)
1282
1283 class java_lang_invoke_ResolvedMethodName : AllStatic {
1284 friend class JavaClasses;
1285
1286 static int _vmtarget_offset;
1287 static int _vmholder_offset;
1288
1289 static void compute_offsets();
1290 public:
1291 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1292
1293 static int vmtarget_offset() { CHECK_INIT(_vmtarget_offset); }
1294
1295 static Method* vmtarget(oop resolved_method);
1296 static void set_vmtarget(oop resolved_method, Method* method);
1297
1298 static void set_vmholder(oop resolved_method, oop holder);
1299
1300 // find or create resolved member name
1301 static oop find_resolved_method(const methodHandle& m, TRAPS);
1302
1303 static bool is_instance(oop resolved_method);
1304 };
1305
1306
1307 #define MEMBERNAME_INJECTED_FIELDS(macro) \
1308 macro(java_lang_invoke_MemberName, vmindex, intptr_signature, false)
1309
1310
1311 class java_lang_invoke_MemberName: AllStatic {
1312 friend class JavaClasses;
1313
1314 private:
1315 // From java.lang.invoke.MemberName:
1316 // private Class<?> clazz; // class in which the method is defined
1317 // private String name; // may be null if not yet materialized
1318 // private Object type; // may be null if not yet materialized
1319 // private int flags; // modifier bits; see reflect.Modifier
1320 // private ResolvedMethodName method; // holds VM-specific target value
1321 // private intptr_t vmindex; // member index within class or interface
1322 static int _clazz_offset;
1323 static int _name_offset;
1324 static int _type_offset;
1325 static int _flags_offset;
1326 static int _method_offset;
1327 static int _vmindex_offset;
1328
1329 static void compute_offsets();
1330
1331 public:
1332 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1333 // Accessors
1334 static oop clazz(oop mname);
1335 static void set_clazz(oop mname, oop clazz);
1336
1337 static oop type(oop mname);
1338 static void set_type(oop mname, oop type);
1339
1340 static oop name(oop mname);
1341 static void set_name(oop mname, oop name);
1342
1343 static int flags(oop mname);
1344 static void set_flags(oop mname, int flags);
1345
1346 // Link through ResolvedMethodName field to get Method*
1347 static Method* vmtarget(oop mname);
1348 static void set_method(oop mname, oop method);
1349
1350 static intptr_t vmindex(oop mname);
1351 static void set_vmindex(oop mname, intptr_t index);
1352
1353 // Testers
1354 static bool is_subclass(Klass* klass) {
1355 return klass->is_subclass_of(vmClasses::MemberName_klass());
1356 }
1357 static bool is_instance(oop obj);
1358
1359 static bool is_method(oop obj);
1360
1361 // Relevant integer codes (keep these in synch. with MethodHandleNatives.Constants):
1362 enum {
1363 MN_IS_METHOD = 0x00010000, // method (not constructor)
1364 MN_IS_CONSTRUCTOR = 0x00020000, // constructor
1365 MN_IS_FIELD = 0x00040000, // field
1366 MN_IS_TYPE = 0x00080000, // nested type
1367 MN_CALLER_SENSITIVE = 0x00100000, // @CallerSensitive annotation detected
1368 MN_TRUSTED_FINAL = 0x00200000, // trusted final field
1369 MN_HIDDEN_MEMBER = 0x00400000, // @Hidden annotation detected
1370 MN_REFERENCE_KIND_SHIFT = 24, // refKind
1371 MN_REFERENCE_KIND_MASK = 0x0F000000 >> MN_REFERENCE_KIND_SHIFT,
1372 MN_NESTMATE_CLASS = 0x00000001,
1373 MN_HIDDEN_CLASS = 0x00000002,
1374 MN_STRONG_LOADER_LINK = 0x00000004,
1375 MN_ACCESS_VM_ANNOTATIONS = 0x00000008,
1376 // Lookup modes
1377 MN_MODULE_MODE = 0x00000010,
1378 MN_UNCONDITIONAL_MODE = 0x00000020,
1379 MN_TRUSTED_MODE = -1
1380 };
1381
1382 // Accessors for code generation:
1383 static int clazz_offset() { CHECK_INIT(_clazz_offset); }
1384 static int type_offset() { CHECK_INIT(_type_offset); }
1385 static int flags_offset() { CHECK_INIT(_flags_offset); }
1386 static int method_offset() { CHECK_INIT(_method_offset); }
1387 static int vmindex_offset() { CHECK_INIT(_vmindex_offset); }
1388 };
1389
1390
1391 // Interface to java.lang.invoke.MethodType objects
1392
1393 class java_lang_invoke_MethodType: AllStatic {
1394 friend class JavaClasses;
1395
1396 private:
1397 static int _rtype_offset;
1398 static int _ptypes_offset;
1399
1400 static void compute_offsets();
1401
1402 public:
1403 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1404 // Accessors
1405 static oop rtype(oop mt);
1406 static objArrayOop ptypes(oop mt);
1407
1408 static oop ptype(oop mt, int index);
1409 static int ptype_count(oop mt);
1410
1411 static int ptype_slot_count(oop mt); // extra counts for long/double
1412 static int rtype_slot_count(oop mt); // extra counts for long/double
1413
1414 static Symbol* as_signature(oop mt, bool intern_if_not_found);
1415 static void print_signature(oop mt, outputStream* st);
1416
1417 static bool is_instance(oop obj);
1418
1419 static bool equals(oop mt1, oop mt2);
1420
1421 // Accessors for code generation:
1422 static int rtype_offset() { CHECK_INIT(_rtype_offset); }
1423 static int ptypes_offset() { CHECK_INIT(_ptypes_offset); }
1424 };
1425
1426
1427 // Interface to java.lang.invoke.CallSite objects
1428 #define CALLSITE_INJECTED_FIELDS(macro) \
1429 macro(java_lang_invoke_CallSite, vmdependencies, intptr_signature, false) \
1430 macro(java_lang_invoke_CallSite, last_cleanup, long_signature, false)
1431
1432 class java_lang_invoke_CallSite: AllStatic {
1433 friend class JavaClasses;
1434
1435 private:
1436 static int _target_offset;
1437 static int _vmdependencies_offset;
1438 static int _last_cleanup_offset;
1439
1440 static void compute_offsets();
1441
1442 public:
1443 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1444 // Accessors
1445 static oop target( oop site);
1446 static void set_target( oop site, oop target);
1447 static void set_target_volatile( oop site, oop target);
1448
1449 static DependencyContext vmdependencies(oop call_site);
1450
1451 // Testers
1452 static bool is_subclass(Klass* klass) {
1453 return klass->is_subclass_of(vmClasses::CallSite_klass());
1454 }
1455 static bool is_instance(oop obj);
1456
1457 // Accessors for code generation:
1458 static int target_offset() { CHECK_INIT(_target_offset); }
1459 };
1460
1461 // Interface to java.lang.invoke.ConstantCallSite objects
1462
1463 class java_lang_invoke_ConstantCallSite: AllStatic {
1464 friend class JavaClasses;
1465
1466 private:
1467 static int _is_frozen_offset;
1468
1469 static void compute_offsets();
1470
1471 public:
1472 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1473 // Accessors
1474 static jboolean is_frozen(oop site);
1475
1476 // Testers
1477 static bool is_subclass(Klass* klass) {
1478 return klass->is_subclass_of(vmClasses::ConstantCallSite_klass());
1479 }
1480 static bool is_instance(oop obj);
1481 };
1482
1483 // Interface to java.lang.ClassLoader objects
1484
1485 #define CLASSLOADER_INJECTED_FIELDS(macro) \
1486 macro(java_lang_ClassLoader, loader_data, intptr_signature, false)
1487
1488 class java_lang_ClassLoader : AllStatic {
1489 private:
1490 static int _loader_data_offset;
1491 static int _parent_offset;
1492 static int _parallelCapable_offset;
1493 static int _name_offset;
1494 static int _nameAndId_offset;
1495 static int _unnamedModule_offset;
1496
1497 static void compute_offsets();
1498
1499 public:
1500 // Support for CDS
1501 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1502 static int loader_data_offset() { return _loader_data_offset; }
1503
1504 static ClassLoaderData* loader_data_acquire(oop loader);
1505 static ClassLoaderData* loader_data(oop loader);
1506 static void release_set_loader_data(oop loader, ClassLoaderData* new_data);
1507
1508 static oop parent(oop loader);
1509 static oop parent_no_keepalive(oop loader);
1510 static oop name(oop loader);
1511 static oop nameAndId(oop loader);
1512 static bool isAncestor(oop loader, oop cl);
1513
1514 // Support for parallelCapable field
1515 static bool parallelCapable(oop the_class_mirror);
1516
1517 static bool is_trusted_loader(oop loader);
1518
1519 // Testers
1520 static bool is_subclass(Klass* klass) {
1521 return klass->is_subclass_of(vmClasses::ClassLoader_klass());
1522 }
1523 static bool is_instance(oop obj);
1524
1525 static oop unnamedModule(oop loader);
1526
1527 // Debugging
1528 friend class JavaClasses;
1529 };
1530
1531
1532 // Interface to java.lang.System objects
1533
1534 class java_lang_System : AllStatic {
1535 private:
1536 static int _static_in_offset;
1537 static int _static_out_offset;
1538 static int _static_err_offset;
1539
1540 public:
1541 static int in_offset() { CHECK_INIT(_static_in_offset); }
1542 static int out_offset() { CHECK_INIT(_static_out_offset); }
1543 static int err_offset() { CHECK_INIT(_static_err_offset); }
1544
1545 static void compute_offsets();
1546 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1547
1548 // Debugging
1549 friend class JavaClasses;
1550 };
1551
1552
1553 // Interface to java.lang.StackTraceElement objects
1554
1555 class java_lang_StackTraceElement: AllStatic {
1556 private:
1557 static int _declaringClassObject_offset;
1558 static int _classLoaderName_offset;
1559 static int _moduleName_offset;
1560 static int _moduleVersion_offset;
1561 static int _declaringClass_offset;
1562 static int _methodName_offset;
1563 static int _fileName_offset;
1564 static int _lineNumber_offset;
1565
1566 // Setters
1567 static void set_classLoaderName(oop element, oop value);
1568 static void set_moduleName(oop element, oop value);
1569 static void set_moduleVersion(oop element, oop value);
1570 static void set_declaringClass(oop element, oop value);
1571 static void set_methodName(oop element, oop value);
1572 static void set_fileName(oop element, oop value);
1573 static void set_lineNumber(oop element, int value);
1574 static void set_declaringClassObject(oop element, oop value);
1575
1576 static void decode_file_and_line(Handle java_mirror, InstanceKlass* holder, int version,
1577 const methodHandle& method, int bci,
1578 Symbol*& source, oop& source_file, int& line_number, TRAPS);
1579
1580 public:
1581 // Create an instance of StackTraceElement
1582 static oop create(const methodHandle& method, int bci, TRAPS);
1583
1584 static void fill_in(Handle element, InstanceKlass* holder, const methodHandle& method,
1585 int version, int bci, Symbol* name, TRAPS);
1586
1587 static void compute_offsets();
1588 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1589
1590 #if INCLUDE_JVMCI
1591 static void decode(const methodHandle& method, int bci, Symbol*& fileName, int& lineNumber, TRAPS);
1592 #endif
1593
1594 // Debugging
1595 friend class JavaClasses;
1596 };
1597
1598
1599 class Backtrace: AllStatic {
1600 public:
1601 // Helper backtrace functions to store bci|version together.
1602 static int merge_bci_and_version(int bci, int version);
1603 static int merge_mid_and_cpref(int mid, int cpref);
1604 static int bci_at(unsigned int merged);
1605 static int version_at(unsigned int merged);
1606 static int mid_at(unsigned int merged);
1607 static int cpref_at(unsigned int merged);
1608 static int get_line_number(Method* method, int bci);
1609 static Symbol* get_source_file_name(InstanceKlass* holder, int version);
1610
1611 // Debugging
1612 friend class JavaClasses;
1613 };
1614
1615 class java_lang_ClassFrameInfo: AllStatic {
1616 private:
1617 static int _classOrMemberName_offset;
1618 static int _flags_offset;
1619
1620 public:
1621 static oop classOrMemberName(oop info);
1622 static int flags(oop info);
1623
1624 // Setters
1625 static void init_class(Handle stackFrame, const methodHandle& m);
1626 static void init_method(Handle stackFrame, const methodHandle& m, TRAPS);
1627
1628 static void compute_offsets();
1629 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1630
1631 // Debugging
1632 friend class JavaClasses;
1633 };
1634
1635 // Interface to java.lang.StackFrameInfo objects
1636
1637 #define STACKFRAMEINFO_INJECTED_FIELDS(macro) \
1638 macro(java_lang_StackFrameInfo, version, short_signature, false)
1639
1640 class java_lang_StackFrameInfo: AllStatic {
1641 private:
1642 static int _type_offset;
1643 static int _name_offset;
1644 static int _bci_offset;
1645 static int _version_offset;
1646 static int _contScope_offset;
1647
1648 public:
1649 // Getters
1650 static oop name(oop info);
1651 static oop type(oop info);
1652 static Method* get_method(oop info);
1653
1654 // Setters
1655 static void set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, oop cont, TRAPS);
1656 static void set_name(oop info, oop value);
1657 static void set_type(oop info, oop value);
1658 static void set_bci(oop info, int value);
1659
1660 static void set_version(oop info, short value);
1661 static void set_contScope(oop info, oop value);
1662
1663 static void compute_offsets();
1664 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1665
1666 static void to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS);
1667
1668 // Debugging
1669 friend class JavaClasses;
1670 };
1671
1672 class java_lang_LiveStackFrameInfo: AllStatic {
1673 private:
1674 static int _monitors_offset;
1675 static int _locals_offset;
1676 static int _operands_offset;
1677 static int _mode_offset;
1678
1679 public:
1680 static void set_monitors(oop info, oop value);
1681 static void set_locals(oop info, oop value);
1682 static void set_operands(oop info, oop value);
1683 static void set_mode(oop info, int value);
1684
1685 static void compute_offsets();
1686 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1687
1688 // Debugging
1689 friend class JavaClasses;
1690 };
1691
1692 // Interface to java.lang.reflect.RecordComponent objects
1693
1694 class java_lang_reflect_RecordComponent: AllStatic {
1695 private:
1696 static int _clazz_offset;
1697 static int _name_offset;
1698 static int _type_offset;
1699 static int _accessor_offset;
1700 static int _signature_offset;
1701 static int _annotations_offset;
1702 static int _typeAnnotations_offset;
1703
1704 // Setters
1705 static void set_clazz(oop element, oop value);
1706 static void set_name(oop element, oop value);
1707 static void set_type(oop element, oop value);
1708 static void set_accessor(oop element, oop value);
1709 static void set_signature(oop element, oop value);
1710 static void set_annotations(oop element, oop value);
1711 static void set_typeAnnotations(oop element, oop value);
1712
1713 public:
1714 // Create an instance of RecordComponent
1715 static oop create(InstanceKlass* holder, RecordComponent* component, TRAPS);
1716
1717 static void compute_offsets();
1718 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1719
1720 // Debugging
1721 friend class JavaClasses;
1722 };
1723
1724
1725 // Interface to java.lang.AssertionStatusDirectives objects
1726
1727 class java_lang_AssertionStatusDirectives: AllStatic {
1728 private:
1729 static int _classes_offset;
1730 static int _classEnabled_offset;
1731 static int _packages_offset;
1732 static int _packageEnabled_offset;
1733 static int _deflt_offset;
1734
1735 public:
1736 // Setters
1737 static void set_classes(oop obj, oop val);
1738 static void set_classEnabled(oop obj, oop val);
1739 static void set_packages(oop obj, oop val);
1740 static void set_packageEnabled(oop obj, oop val);
1741 static void set_deflt(oop obj, bool val);
1742
1743 static void compute_offsets();
1744 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1745
1746 // Debugging
1747 friend class JavaClasses;
1748 };
1749
1750
1751 class java_util_concurrent_locks_AbstractOwnableSynchronizer : AllStatic {
1752 private:
1753 static int _owner_offset;
1754 public:
1755 static void compute_offsets();
1756 static oop get_owner_threadObj(oop obj);
1757 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1758 };
1759
1760 // Interface to jdk.internal.misc.UnsafeConsants
1761
1762 class jdk_internal_misc_UnsafeConstants : AllStatic {
1763 public:
1764 static void set_unsafe_constants();
1765 static void compute_offsets() { }
1766 static void serialize_offsets(SerializeClosure* f) { }
1767 };
1768
1769 // Interface to jdk.internal.vm.vector.VectorSupport.VectorPayload objects
1770
1771 class vector_VectorPayload : AllStatic {
1772 private:
1773 static int _payload_offset;
1774 public:
1775 static void set_payload(oop o, oop val);
1776
1777 static void compute_offsets();
1778 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1779
1780 // Testers
1781 static bool is_subclass(Klass* klass) {
1782 return klass->is_subclass_of(vmClasses::vector_VectorPayload_klass());
1783 }
1784 static bool is_instance(oop obj);
1785 };
1786
1787 class java_lang_Integer : AllStatic {
1788 public:
1789 static jint value(oop obj);
1790 };
1791
1792 class java_lang_Long : AllStatic {
1793 public:
1794 static jlong value(oop obj);
1795 };
1796
1797 class java_lang_Character : AllStatic {
1798 public:
1799 static jchar value(oop obj);
1800 };
1801
1802 class java_lang_Short : AllStatic {
1803 public:
1804 static jshort value(oop obj);
1805 };
1806
1807 class java_lang_Byte : AllStatic {
1808 public:
1809 static jbyte value(oop obj);
1810 };
1811
1812 class java_lang_Boolean : AllStatic {
1813 private:
1814 static int _static_TRUE_offset;
1815 static int _static_FALSE_offset;
1816 public:
1817 static Symbol* symbol();
1818 static void compute_offsets(InstanceKlass* k);
1819 static oop get_TRUE(InstanceKlass *k);
1820 static oop get_FALSE(InstanceKlass *k);
1821 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1822 static jboolean value(oop obj);
1823 };
1824
1825 class java_lang_Integer_IntegerCache : AllStatic {
1826 private:
1827 static int _static_cache_offset;
1828 public:
1829 static Symbol* symbol();
1830 static void compute_offsets(InstanceKlass* k);
1831 static objArrayOop cache(InstanceKlass *k);
1832 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1833 };
1834
1835 class java_lang_Long_LongCache : AllStatic {
1836 private:
1837 static int _static_cache_offset;
1838 public:
1839 static Symbol* symbol();
1840 static void compute_offsets(InstanceKlass* k);
1841 static objArrayOop cache(InstanceKlass *k);
1842 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1843 };
1844
1845 class java_lang_Character_CharacterCache : AllStatic {
1846 private:
1847 static int _static_cache_offset;
1848 public:
1849 static Symbol* symbol();
1850 static void compute_offsets(InstanceKlass* k);
1851 static objArrayOop cache(InstanceKlass *k);
1852 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1853 };
1854
1855 class java_lang_Short_ShortCache : AllStatic {
1856 private:
1857 static int _static_cache_offset;
1858 public:
1859 static Symbol* symbol();
1860 static void compute_offsets(InstanceKlass* k);
1861 static objArrayOop cache(InstanceKlass *k);
1862 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1863 };
1864
1865 class java_lang_Byte_ByteCache : AllStatic {
1866 private:
1867 static int _static_cache_offset;
1868 public:
1869 static Symbol* symbol();
1870 static void compute_offsets(InstanceKlass* k);
1871 static objArrayOop cache(InstanceKlass *k);
1872 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1873 };
1874
1875
1876 // Interface to java.lang.InternalError objects
1877
1878 #define INTERNALERROR_INJECTED_FIELDS(macro) \
1879 macro(java_lang_InternalError, during_unsafe_access, bool_signature, false)
1880
1881 class java_lang_InternalError : AllStatic {
1882 private:
1883 static int _during_unsafe_access_offset;
1884 public:
1885 static jboolean during_unsafe_access(oop internal_error);
1886 static void set_during_unsafe_access(oop internal_error);
1887 static void compute_offsets();
1888 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1889 };
1890
1891 // Use to declare fields that need to be injected into Java classes
1892 // for the JVM to use. The name_index and signature_index are
1893 // declared in vmSymbols. The may_be_java flag is used to declare
1894 // fields that might already exist in Java but should be injected if
1895 // they don't. Otherwise the field is unconditionally injected and
1896 // the JVM uses the injected one. This is to ensure that name
1897 // collisions don't occur. In general may_be_java should be false
1898 // unless there's a good reason.
1899
1900 class InjectedField {
1901 public:
1902 const vmClassID klass_id;
1903 const vmSymbolID name_index;
1904 const vmSymbolID signature_index;
1905 const bool may_be_java;
1906
1907
1908 InstanceKlass* klass() const { return vmClasses::klass_at(klass_id); }
1909 Symbol* name() const { return lookup_symbol(name_index); }
1910 Symbol* signature() const { return lookup_symbol(signature_index); }
1911
1912 int compute_offset();
1913
1914 // Find the Symbol for this index
1915 static Symbol* lookup_symbol(vmSymbolID symbol_index) {
1916 return Symbol::vm_symbol_at(symbol_index);
1917 }
1918 };
1919
1920
1921 // Interface to hard-coded offset checking
1922
1923 enum class InjectedFieldID : int;
1924
1925 class JavaClasses : AllStatic {
1926 private:
1927
1928 static InjectedField _injected_fields[];
1929
1930 static bool check_offset(const char *klass_name, int offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1931 public:
1932
1933 static int compute_injected_offset(InjectedFieldID id);
1934
1935 static void compute_offsets();
1936 static void check_offsets() PRODUCT_RETURN;
1937 static void serialize_offsets(SerializeClosure* soc) NOT_CDS_RETURN;
1938 static InjectedField* get_injected(Symbol* class_name, int* field_count);
1939 static bool is_supported_for_archiving(oop obj) NOT_CDS_JAVA_HEAP_RETURN_(false);
1940
1941 static void compute_offset(int &dest_offset,
1942 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol,
1943 bool is_static = false);
1944 static void compute_offset(int& dest_offset, InstanceKlass* ik,
1945 const char* name_string, Symbol* signature_symbol,
1946 bool is_static = false);
1947 };
1948
1949 #undef CHECK_INIT
1950
1951 #endif // SHARE_CLASSFILE_JAVACLASSES_HPP