1 /*
2 * Copyright (c) 1997, 2025, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_CLASSFILE_JAVACLASSES_HPP
26 #define SHARE_CLASSFILE_JAVACLASSES_HPP
27
28 #include "classfile/vmClasses.hpp"
29 #include "oops/instanceKlass.hpp"
30 #include "oops/oopsHierarchy.hpp"
31 #include "oops/symbol.hpp"
32 #include "runtime/handles.hpp"
33 #include "runtime/os.hpp"
34 #include "utilities/macros.hpp"
35 #include "utilities/utf8.hpp"
36 #include "utilities/vmEnums.hpp"
37
38 class JvmtiThreadState;
39 class RecordComponent;
40 class SerializeClosure;
41 class ObjectWaiter;
42 class ObjectMonitor;
43
44 #define CHECK_INIT(offset) assert(offset != 0, "should be initialized"); return offset;
45
46 // Interface to java.lang.Object objects
47
48 class java_lang_Object : AllStatic {
49 public:
50 static void register_natives(TRAPS);
51 };
52
53 // Interface to java.lang.String objects
54
55 // The flags field is a collection of bits representing boolean values used
56 // internally by the VM.
57 #define STRING_INJECTED_FIELDS(macro) \
58 macro(java_lang_String, flags, byte_signature, false)
59
60 class java_lang_String : AllStatic {
61 private:
62 static int _value_offset;
63 static int _hash_offset;
64 static int _hashIsZero_offset;
65 static int _coder_offset;
66 static int _flags_offset;
67
68 static bool _initialized;
69
70 static Handle basic_create(int length, bool byte_arr, TRAPS);
71
72 static inline void set_coder(oop string, jbyte coder);
73
74 // Bitmasks for values in the injected flags field.
75 static const uint8_t _deduplication_forbidden_mask = 1 << 0;
76 static const uint8_t _deduplication_requested_mask = 1 << 1;
77
78 static int flags_offset() { CHECK_INIT(_flags_offset); }
79 // Return the address of the injected flags field.
80 static inline uint8_t* flags_addr(oop java_string);
81 // Test whether the designated bit of the injected flags field is set.
82 static inline bool is_flag_set(oop java_string, uint8_t flag_mask);
83 // Atomically test and set the designated bit of the injected flags field,
84 // returning true if the bit was already set.
85 static bool test_and_set_flag(oop java_string, uint8_t flag_mask);
86
87 static inline unsigned int hash_code_impl(oop java_string, bool update);
88
89 public:
90
91 // Coders
92 enum Coder {
93 CODER_LATIN1 = 0,
94 CODER_UTF16 = 1
95 };
96
97 static void compute_offsets();
98 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
99
100 // Instance creation
101 static Handle create_from_unicode(const jchar* unicode, int len, TRAPS);
102 static oop create_oop_from_unicode(const jchar* unicode, int len, TRAPS);
103 static Handle create_from_str(const char* utf8_str, TRAPS);
104 static oop create_oop_from_str(const char* utf8_str, TRAPS);
105 static Handle create_from_symbol(const Symbol* symbol, TRAPS);
106 static Handle create_from_platform_dependent_str(const char* str, TRAPS);
107
108 static void set_compact_strings(bool value);
109
110 static int value_offset() { CHECK_INIT(_value_offset); }
111 static int coder_offset() { CHECK_INIT(_coder_offset); }
112
113 static inline void set_value(oop string, typeArrayOop buffer);
114
115 // Set the deduplication_forbidden flag true. This flag is sticky; once
116 // set it never gets cleared. This is set when a String is interned in
117 // the StringTable, to prevent string deduplication from changing the
118 // String's value array.
119 static inline void set_deduplication_forbidden(oop java_string);
120
121 // Test and set the deduplication_requested flag. Returns the old value
122 // of the flag. This flag is sticky; once set it never gets cleared.
123 // Some GCs may use this flag when deciding whether to request
124 // deduplication of a String, to avoid multiple requests for the same
125 // object.
126 static inline bool test_and_set_deduplication_requested(oop java_string);
127
128 // Accessors
129 static inline typeArrayOop value(oop java_string);
130 static inline typeArrayOop value_no_keepalive(oop java_string);
131 static inline bool hash_is_set(oop string);
132 static inline bool is_latin1(oop java_string);
133 static inline bool deduplication_forbidden(oop java_string);
134 static inline bool deduplication_requested(oop java_string);
135 static inline int length(oop java_string);
136 static inline int length(oop java_string, typeArrayOop string_value);
137 static size_t utf8_length(oop java_string);
138 static size_t utf8_length(oop java_string, typeArrayOop string_value);
139 // Legacy variants that truncate the length if needed
140 static int utf8_length_as_int(oop java_string);
141 static int utf8_length_as_int(oop java_string, typeArrayOop string_value);
142
143 // String converters
144 static char* as_utf8_string(oop java_string);
145 // `length` is set to the length of the utf8 sequence.
146 static char* as_utf8_string(oop java_string, size_t& length);
147 static char* as_utf8_string_full(oop java_string, char* buf, size_t buflen, size_t& length);
148 static char* as_utf8_string(oop java_string, char* buf, size_t buflen);
149 static char* as_utf8_string(oop java_string, int start, int len);
150 static char* as_utf8_string(oop java_string, typeArrayOop value, char* buf, size_t buflen);
151 static char* as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, size_t buflen);
152 static char* as_platform_dependent_str(Handle java_string, TRAPS);
153 static jchar* as_unicode_string(oop java_string, int& length, TRAPS);
154 static jchar* as_unicode_string_or_null(oop java_string, int& length);
155 // produce an ascii string with all other values quoted using \u####
156 static char* as_quoted_ascii(oop java_string);
157
158 // Compute the hash value for a java.lang.String object which would
159 // contain the characters passed in.
160 //
161 // As the hash value used by the String object itself, in
162 // String.hashCode(). This value is normally calculated in Java code
163 // in the String.hashCode method(), but is precomputed for String
164 // objects in the shared archive file.
165 // hash P(31) from Kernighan & Ritchie
166 //
167 // For this reason, THIS ALGORITHM MUST MATCH String.hashCode().
168 static unsigned int hash_code(const jchar* s, int len) {
169 unsigned int h = 0;
170 while (len-- > 0) {
171 h = 31*h + (unsigned int) *s;
172 s++;
173 }
174 return h;
175 }
176
177 static unsigned int hash_code(const jbyte* s, int len) {
178 unsigned int h = 0;
179 while (len-- > 0) {
180 h = 31*h + (((unsigned int) *s) & 0xFF);
181 s++;
182 }
183 return h;
184 }
185
186 static unsigned int hash_code(const char* utf8_str, size_t utf8_len) {
187 unsigned int h = 0;
188 int unicode_length = UTF8::unicode_length(utf8_str, utf8_len);
189
190 jchar c;
191 while (unicode_length-- > 0) {
192 utf8_str = UTF8::next(utf8_str, &c);
193 h = 31 * h + ((unsigned int)c);
194 }
195 return h;
196 }
197
198 static unsigned int hash_code(oop java_string);
199 static unsigned int hash_code_noupdate(oop java_string);
200
201 // Compare strings (of different types/encodings), length is the string (array) length
202 static bool equals(oop java_string, const jchar* chars, int len);
203 static bool equals(oop java_string, const char* utf8_str, size_t utf8_len);
204 static bool equals(oop str1, oop str2);
205 static inline bool value_equals(typeArrayOop str_value1, typeArrayOop str_value2);
206
207 // Conversion between '.' and '/' formats, and allocate a String from the result.
208 static Handle externalize_classname(Symbol* java_name, TRAPS);
209
210 // Conversion
211 static Symbol* as_symbol(oop java_string);
212 static Symbol* as_symbol_or_null(oop java_string);
213
214 // Tester
215 static inline bool is_instance(oop obj);
216
217 // Debugging
218 static void print(oop java_string, outputStream* st, int max_length = MaxStringPrintSize);
219 friend class JavaClasses;
220 friend class StringTable;
221 };
222
223
224 // Interface to java.lang.Class objects
225
226 #define CLASS_INJECTED_FIELDS(macro) \
227 macro(java_lang_Class, klass, intptr_signature, false) \
228 macro(java_lang_Class, array_klass, intptr_signature, false) \
229 macro(java_lang_Class, oop_size, int_signature, false) \
230 macro(java_lang_Class, static_oop_field_count, int_signature, false) \
231 macro(java_lang_Class, source_file, object_signature, false) \
232 macro(java_lang_Class, init_lock, object_signature, false)
233
234 class java_lang_Class : AllStatic {
235 friend class VMStructs;
236 friend class JVMCIVMStructs;
237
238 private:
239
240 // The fake offsets are added by the class loader when java.lang.Class is loaded
241
242 static int _klass_offset;
243 static int _array_klass_offset;
244
245 static int _oop_size_offset;
246 static int _static_oop_field_count_offset;
247
248 static int _protection_domain_offset;
249 static int _init_lock_offset;
250 static int _signers_offset;
251 static int _class_loader_offset;
252 static int _module_offset;
253 static int _component_mirror_offset;
254 static int _name_offset;
255 static int _source_file_offset;
256 static int _classData_offset;
257 static int _classRedefinedCount_offset;
258 static int _reflectionData_offset;
259 static int _modifiers_offset;
260 static int _is_primitive_offset;
261 static int _raw_access_flags_offset;
262
263 static bool _offsets_computed;
264
265 static GrowableArray<Klass*>* _fixup_mirror_list;
266 static GrowableArray<Klass*>* _fixup_module_field_list;
267
268 static void set_init_lock(oop java_class, oop init_lock);
269 static void set_protection_domain(oop java_class, oop protection_domain);
270 static void set_class_loader(oop java_class, oop class_loader);
271 static void set_component_mirror(oop java_class, oop comp_mirror);
272 static void initialize_mirror_fields(Klass* k, Handle mirror, Handle protection_domain,
273 Handle classData, TRAPS);
274 static void set_mirror_module_field(JavaThread* current, Klass* K, Handle mirror, Handle module);
275 public:
276 static void allocate_fixup_lists();
277 static void compute_offsets();
278
279 // Instance creation
280 static void allocate_mirror(Klass* k, bool is_scratch, Handle protection_domain, Handle classData,
281 Handle& mirror, Handle& comp_mirror, TRAPS); // returns mirror and comp_mirror
282 static void create_mirror(Klass* k, Handle class_loader, Handle module,
283 Handle protection_domain, Handle classData, TRAPS);
284 static void fixup_mirror(Klass* k, TRAPS);
285 static oop create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS);
286
287 // Archiving
288 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
289 static void create_scratch_mirror(Klass* k, TRAPS) NOT_CDS_JAVA_HEAP_RETURN;
290 static bool restore_archived_mirror(Klass *k, Handle class_loader, Handle module,
291 Handle protection_domain,
292 TRAPS) NOT_CDS_JAVA_HEAP_RETURN_(false);
293
294 static void fixup_module_field(Klass* k, Handle module);
295
296 // Conversion
297 static Klass* as_Klass(oop java_class);
298 static void set_klass(oop java_class, Klass* klass);
299 static BasicType as_BasicType(oop java_class, Klass** reference_klass = nullptr);
300 static Symbol* as_signature(oop java_class, bool intern_if_not_found);
301 static void print_signature(oop java_class, outputStream *st);
302 static const char* as_external_name(oop java_class);
303 // Testing
304 static bool is_instance(oop obj);
305
306 static bool is_primitive(oop java_class);
307 static void set_is_primitive(oop java_class);
308 static BasicType primitive_type(oop java_class);
309 static oop primitive_mirror(BasicType t);
310 // JVM_NewArray support
311 static Klass* array_klass_acquire(oop java_class);
312 static void release_set_array_klass(oop java_class, Klass* klass);
313 // compiler support for class operations
314 static int klass_offset() { CHECK_INIT(_klass_offset); }
315 static int array_klass_offset() { CHECK_INIT(_array_klass_offset); }
316 // Support for classRedefinedCount field
317 static int classRedefinedCount(oop the_class_mirror);
318 static void set_classRedefinedCount(oop the_class_mirror, int value);
319
320 // Support for embedded per-class oops
321 static oop protection_domain(oop java_class);
322 static oop init_lock(oop java_class);
323 static void clear_init_lock(oop java_class) {
324 set_init_lock(java_class, nullptr);
325 }
326 static oop component_mirror(oop java_class);
327 static int component_mirror_offset() { return _component_mirror_offset; }
328 static objArrayOop signers(oop java_class);
329 static oop class_data(oop java_class);
330 static void set_class_data(oop java_class, oop classData);
331 static void set_reflection_data(oop java_class, oop reflection_data);
332 static int reflection_data_offset() { return _reflectionData_offset; }
333
334 static oop class_loader(oop java_class);
335 static void set_module(oop java_class, oop module);
336 static oop module(oop java_class);
337
338 static oop name(Handle java_class, TRAPS);
339
340 static oop source_file(oop java_class);
341 static void set_source_file(oop java_class, oop source_file);
342
343 static int modifiers(oop java_class);
344 static void set_modifiers(oop java_class, u2 value);
345
346 static int raw_access_flags(oop java_class);
347 static void set_raw_access_flags(oop java_class, u2 value);
348
349 static size_t oop_size(oop java_class);
350 static void set_oop_size(HeapWord* java_class, size_t size);
351 static int static_oop_field_count(oop java_class);
352 static void set_static_oop_field_count(oop java_class, int size);
353
354 static GrowableArray<Klass*>* fixup_mirror_list() {
355 return _fixup_mirror_list;
356 }
357 static void set_fixup_mirror_list(GrowableArray<Klass*>* v) {
358 _fixup_mirror_list = v;
359 }
360
361 static GrowableArray<Klass*>* fixup_module_field_list() {
362 return _fixup_module_field_list;
363 }
364 static void set_fixup_module_field_list(GrowableArray<Klass*>* v) {
365 _fixup_module_field_list = v;
366 }
367
368 // Debugging
369 friend class JavaClasses;
370 };
371
372 // Interface to java.lang.Thread objects
373
374 #define THREAD_INJECTED_FIELDS(macro) \
375 macro(java_lang_Thread, jvmti_thread_state, intptr_signature, false) \
376 macro(java_lang_Thread, jvmti_VTMS_transition_disable_count, int_signature, false) \
377 macro(java_lang_Thread, jvmti_is_in_VTMS_transition, bool_signature, false) \
378 JFR_ONLY(macro(java_lang_Thread, jfr_epoch, short_signature, false))
379
380 class java_lang_Thread : AllStatic {
381 friend class java_lang_VirtualThread;
382 friend class JVMCIVMStructs;
383 private:
384 // Note that for this class the layout changed between JDK1.2 and JDK1.3,
385 // so we compute the offsets at startup rather than hard-wiring them.
386 static int _holder_offset;
387 static int _name_offset;
388 static int _contextClassLoader_offset;
389 static int _eetop_offset;
390 static int _jvmti_thread_state_offset;
391 static int _jvmti_VTMS_transition_disable_count_offset;
392 static int _jvmti_is_in_VTMS_transition_offset;
393 static int _interrupted_offset;
394 static int _interruptLock_offset;
395 static int _tid_offset;
396 static int _continuation_offset;
397 static int _park_blocker_offset;
398 static int _scopedValueBindings_offset;
399 JFR_ONLY(static int _jfr_epoch_offset;)
400
401 static void compute_offsets();
402
403 public:
404 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
405
406 // Returns the JavaThread associated with the thread obj
407 static JavaThread* thread(oop java_thread);
408 static JavaThread* thread_acquire(oop java_thread);
409 // Set JavaThread for instance
410 static void set_thread(oop java_thread, JavaThread* thread);
411 static void release_set_thread(oop java_thread, JavaThread* thread);
412 // FieldHolder
413 static oop holder(oop java_thread);
414 // interruptLock
415 static oop interrupt_lock(oop java_thread);
416 // Interrupted status
417 static bool interrupted(oop java_thread);
418 static void set_interrupted(oop java_thread, bool val);
419 // Name
420 static oop name(oop java_thread);
421 static void set_name(oop java_thread, oop name);
422 // Priority
423 static ThreadPriority priority(oop java_thread);
424 static void set_priority(oop java_thread, ThreadPriority priority);
425 // Thread group
426 static oop threadGroup(oop java_thread);
427 // Alive (NOTE: this is not really a field, but provides the correct
428 // definition without doing a Java call)
429 static bool is_alive(oop java_thread);
430 // Daemon
431 static bool is_daemon(oop java_thread);
432 static void set_daemon(oop java_thread);
433 // Context ClassLoader
434 static oop context_class_loader(oop java_thread);
435 // Stack size hint
436 static jlong stackSize(oop java_thread);
437 // Thread ID
438 static int64_t thread_id(oop java_thread);
439 static ByteSize thread_id_offset();
440 // Continuation
441 static inline oop continuation(oop java_thread);
442
443 static JvmtiThreadState* jvmti_thread_state(oop java_thread);
444 static void set_jvmti_thread_state(oop java_thread, JvmtiThreadState* state);
445 static int VTMS_transition_disable_count(oop java_thread);
446 static void inc_VTMS_transition_disable_count(oop java_thread);
447 static void dec_VTMS_transition_disable_count(oop java_thread);
448 static bool is_in_VTMS_transition(oop java_thread);
449 static void set_is_in_VTMS_transition(oop java_thread, bool val);
450 static int is_in_VTMS_transition_offset();
451
452 // Clear all scoped value bindings on error
453 static void clear_scopedValueBindings(oop java_thread);
454
455 // Blocker object responsible for thread parking
456 static oop park_blocker(oop java_thread);
457
458 // Write thread status info to threadStatus field of java.lang.Thread.
459 static void set_thread_status(oop java_thread_oop, JavaThreadStatus status);
460 // Read thread status info from threadStatus field of java.lang.Thread.
461 static JavaThreadStatus get_thread_status(oop java_thread_oop);
462
463 static const char* thread_status_name(oop java_thread_oop);
464
465 // Fill in current stack trace, can cause GC
466 static oop async_get_stack_trace(jobject jthread, TRAPS);
467 static oop get_thread_snapshot(jobject jthread, TRAPS);
468
469 JFR_ONLY(static u2 jfr_epoch(oop java_thread);)
470 JFR_ONLY(static void set_jfr_epoch(oop java_thread, u2 epoch);)
471 JFR_ONLY(static int jfr_epoch_offset() { CHECK_INIT(_jfr_epoch_offset); })
472
473 // Debugging
474 friend class JavaClasses;
475 };
476
477 // Interface to java.lang.Thread$FieldHolder objects
478
479 class java_lang_Thread_FieldHolder : AllStatic {
480 private:
481 static int _group_offset;
482 static int _priority_offset;
483 static int _stackSize_offset;
484 static int _daemon_offset;
485 static int _thread_status_offset;
486
487 static void compute_offsets();
488
489 public:
490 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
491
492 static oop threadGroup(oop holder);
493
494 static ThreadPriority priority(oop holder);
495 static void set_priority(oop holder, ThreadPriority priority);
496
497 static jlong stackSize(oop holder);
498
499 static bool is_daemon(oop holder);
500 static void set_daemon(oop holder, bool val);
501
502 static void set_thread_status(oop holder, JavaThreadStatus status);
503 static JavaThreadStatus get_thread_status(oop holder);
504
505 friend class JavaClasses;
506 };
507
508 // Interface to java.lang.Thread$Constants objects
509
510 class java_lang_Thread_Constants : AllStatic {
511 private:
512 static int _static_VTHREAD_GROUP_offset;
513 static int _static_NOT_SUPPORTED_CLASSLOADER_offset;
514
515 static void compute_offsets();
516 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
517
518 public:
519 static oop get_VTHREAD_GROUP();
520
521 friend class JavaClasses;
522 };
523
524 // Interface to java.lang.ThreadGroup objects
525
526 class java_lang_ThreadGroup : AllStatic {
527 private:
528 static int _parent_offset;
529 static int _name_offset;
530 static int _maxPriority_offset;
531 static int _daemon_offset;
532
533 static void compute_offsets();
534 public:
535 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
536
537 // parent ThreadGroup
538 static oop parent(oop java_thread_group);
539 // name
540 static const char* name(oop java_thread_group);
541 // maxPriority in group
542 static ThreadPriority maxPriority(oop java_thread_group);
543 // Daemon
544 static bool is_daemon(oop java_thread_group);
545
546 // Debugging
547 friend class JavaClasses;
548 };
549
550
551 // Interface to java.lang.VirtualThread objects
552 #define VTHREAD_INJECTED_FIELDS(macro) \
553 macro(java_lang_VirtualThread, objectWaiter, intptr_signature, false) \
554
555 class java_lang_VirtualThread : AllStatic {
556 private:
557 static int static_vthread_scope_offset;
558 static int _carrierThread_offset;
559 static int _continuation_offset;
560 static int _state_offset;
561 static int _next_offset;
562 static int _onWaitingList_offset;
563 static int _notified_offset;
564 static int _interruptible_wait_offset;
565 static int _recheckInterval_offset;
566 static int _timeout_offset;
567 static int _objectWaiter_offset;
568 JFR_ONLY(static int _jfr_epoch_offset;)
569 public:
570 enum {
571 NEW = 0,
572 STARTED = 1,
573 RUNNING = 2,
574 PARKING = 3,
575 PARKED = 4,
576 PINNED = 5,
577 TIMED_PARKING = 6,
578 TIMED_PARKED = 7,
579 TIMED_PINNED = 8,
580 UNPARKED = 9,
581 YIELDING = 10,
582 YIELDED = 11,
583 BLOCKING = 12,
584 BLOCKED = 13,
585 UNBLOCKED = 14,
586 WAITING = 15,
587 WAIT = 16, // waiting in Object.wait
588 TIMED_WAITING = 17,
589 TIMED_WAIT = 18, // waiting in timed-Object.wait
590 TERMINATED = 99,
591
592 // additional state bits
593 SUSPENDED = 1 << 8, // suspended when unmounted
594 };
595
596 static void compute_offsets();
597 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
598
599 // Testers
600 static bool is_subclass(Klass* klass) {
601 return klass->is_subclass_of(vmClasses::VirtualThread_klass());
602 }
603 static bool is_instance(oop obj);
604
605 static oop vthread_scope();
606 static oop carrier_thread(oop vthread);
607 static oop continuation(oop vthread);
608 static int state(oop vthread);
609 static void set_state(oop vthread, int state);
610 static int cmpxchg_state(oop vthread, int old_state, int new_state);
611 static oop next(oop vthread);
612 static void set_next(oop vthread, oop next_vthread);
613 static bool set_onWaitingList(oop vthread, OopHandle& list_head);
614 static jlong timeout(oop vthread);
615 static void set_timeout(oop vthread, jlong value);
616 static void set_notified(oop vthread, jboolean value);
617 static void set_interruptible_wait(oop vthread, jboolean value);
618 static bool is_preempted(oop vthread);
619 static JavaThreadStatus map_state_to_thread_status(int state);
620
621 static inline ObjectWaiter* objectWaiter(oop vthread);
622 static inline void set_objectWaiter(oop vthread, ObjectWaiter* waiter);
623 static ObjectMonitor* current_pending_monitor(oop vthread);
624 static ObjectMonitor* current_waiting_monitor(oop vthread);
625 };
626
627
628 // Interface to java.lang.Throwable objects
629
630 class java_lang_Throwable: AllStatic {
631 friend class BacktraceBuilder;
632 friend class BacktraceIterator;
633
634 private:
635 // Trace constants
636 enum {
637 trace_methods_offset = 0,
638 trace_bcis_offset = 1,
639 trace_mirrors_offset = 2,
640 trace_names_offset = 3,
641 trace_conts_offset = 4,
642 trace_next_offset = 5,
643 trace_hidden_offset = 6,
644 trace_size = 7,
645 trace_chunk_size = 32
646 };
647
648 static int _backtrace_offset;
649 static int _detailMessage_offset;
650 static int _stackTrace_offset;
651 static int _depth_offset;
652 static int _cause_offset;
653 static int _static_unassigned_stacktrace_offset;
654
655 // StackTrace (programmatic access, new since 1.4)
656 static void clear_stacktrace(oop throwable);
657 // Stacktrace (post JDK 1.7.0 to allow immutability protocol to be followed)
658 static void set_stacktrace(oop throwable, oop st_element_array);
659 static oop unassigned_stacktrace();
660
661 public:
662 // Backtrace
663 static oop backtrace(oop throwable);
664 static void set_backtrace(oop throwable, oop value);
665 static int depth(oop throwable);
666 static void set_depth(oop throwable, int value);
667 // Message
668 static int get_detailMessage_offset() { CHECK_INIT(_detailMessage_offset); }
669 static oop message(oop throwable);
670 static const char* message_as_utf8(oop throwable);
671 static void set_message(oop throwable, oop value);
672
673 static oop cause(oop throwable);
674
675 static void print_stack_element(outputStream *st, Method* method, int bci);
676
677 static void compute_offsets();
678 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
679
680 // Allocate space for backtrace (created but stack trace not filled in)
681 static void allocate_backtrace(Handle throwable, TRAPS);
682 // Fill in current stack trace for throwable with preallocated backtrace (no GC)
683 static void fill_in_stack_trace_of_preallocated_backtrace(Handle throwable);
684 // Fill in current stack trace, can cause GC
685 static void fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS);
686 static void fill_in_stack_trace(Handle throwable, const methodHandle& method = methodHandle());
687
688 // Programmatic access to stack trace
689 static void get_stack_trace_elements(int depth, Handle backtrace, objArrayHandle stack_trace, TRAPS);
690
691 // For recreating class initialization error exceptions.
692 static Handle create_initialization_error(JavaThread* current, Handle throwable);
693
694 // Printing
695 static void print(oop throwable, outputStream* st);
696 static void print_stack_trace(Handle throwable, outputStream* st);
697 static void java_printStackTrace(Handle throwable, TRAPS);
698 // Debugging
699 friend class JavaClasses;
700 // Gets the method and bci of the top frame (TOS). Returns false if this failed.
701 static bool get_top_method_and_bci(oop throwable, Method** method, int* bci);
702 };
703
704
705 // Interface to java.lang.reflect.AccessibleObject objects
706
707 class java_lang_reflect_AccessibleObject: AllStatic {
708 private:
709 // Note that to reduce dependencies on the JDK we compute these
710 // offsets at run-time.
711 static int _override_offset;
712
713 static void compute_offsets();
714
715 public:
716 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
717
718 // Accessors
719 static jboolean override(oop reflect);
720 static void set_override(oop reflect, jboolean value);
721
722 // Debugging
723 friend class JavaClasses;
724 };
725
726
727 // Interface to java.lang.reflect.Method objects
728
729 class java_lang_reflect_Method : public java_lang_reflect_AccessibleObject {
730 private:
731 // Note that to reduce dependencies on the JDK we compute these
732 // offsets at run-time.
733 static int _clazz_offset;
734 static int _name_offset;
735 static int _returnType_offset;
736 static int _parameterTypes_offset;
737 static int _exceptionTypes_offset;
738 static int _slot_offset;
739 static int _modifiers_offset;
740 static int _signature_offset;
741 static int _annotations_offset;
742 static int _parameter_annotations_offset;
743 static int _annotation_default_offset;
744
745 static void compute_offsets();
746 public:
747 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
748
749 // Allocation
750 static Handle create(TRAPS);
751
752 // Accessors
753 static oop clazz(oop reflect);
754 static void set_clazz(oop reflect, oop value);
755
756 static void set_name(oop method, oop value);
757
758 static oop return_type(oop method);
759 static void set_return_type(oop method, oop value);
760
761 static oop parameter_types(oop method);
762 static void set_parameter_types(oop method, oop value);
763
764 static int slot(oop reflect);
765 static void set_slot(oop reflect, int value);
766
767 static void set_exception_types(oop method, oop value);
768 static void set_modifiers(oop method, int value);
769 static void set_signature(oop method, oop value);
770 static void set_annotations(oop method, oop value);
771 static void set_parameter_annotations(oop method, oop value);
772 static void set_annotation_default(oop method, oop value);
773
774 // Debugging
775 friend class JavaClasses;
776 };
777
778
779 // Interface to java.lang.reflect.Constructor objects
780
781 class java_lang_reflect_Constructor : public java_lang_reflect_AccessibleObject {
782 private:
783 // Note that to reduce dependencies on the JDK we compute these
784 // offsets at run-time.
785 static int _clazz_offset;
786 static int _parameterTypes_offset;
787 static int _exceptionTypes_offset;
788 static int _slot_offset;
789 static int _modifiers_offset;
790 static int _signature_offset;
791 static int _annotations_offset;
792 static int _parameter_annotations_offset;
793
794 static void compute_offsets();
795 public:
796 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
797
798 // Allocation
799 static Handle create(TRAPS);
800
801 // Accessors
802 static oop clazz(oop reflect);
803 static void set_clazz(oop reflect, oop value);
804
805 static oop parameter_types(oop constructor);
806 static void set_parameter_types(oop constructor, oop value);
807
808 static int slot(oop reflect);
809 static void set_slot(oop reflect, int value);
810
811 static void set_exception_types(oop constructor, oop value);
812 static void set_modifiers(oop constructor, int value);
813 static void set_signature(oop constructor, oop value);
814 static void set_annotations(oop constructor, oop value);
815 static void set_parameter_annotations(oop method, oop value);
816
817 // Debugging
818 friend class JavaClasses;
819 };
820
821
822 // Interface to java.lang.reflect.Field objects
823
824 class java_lang_reflect_Field : public java_lang_reflect_AccessibleObject {
825 private:
826 // Note that to reduce dependencies on the JDK we compute these
827 // offsets at run-time.
828 static int _clazz_offset;
829 static int _name_offset;
830 static int _type_offset;
831 static int _slot_offset;
832 static int _modifiers_offset;
833 static int _trusted_final_offset;
834 static int _signature_offset;
835 static int _annotations_offset;
836
837 static void compute_offsets();
838
839 public:
840 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
841
842 // Allocation
843 static Handle create(TRAPS);
844
845 // Accessors
846 static oop clazz(oop reflect);
847 static void set_clazz(oop reflect, oop value);
848
849 static oop name(oop field);
850 static void set_name(oop field, oop value);
851
852 static oop type(oop field);
853 static void set_type(oop field, oop value);
854
855 static int slot(oop reflect);
856 static void set_slot(oop reflect, int value);
857
858 static int modifiers(oop field);
859 static void set_modifiers(oop field, int value);
860
861 static void set_trusted_final(oop field);
862
863 static void set_signature(oop constructor, oop value);
864 static void set_annotations(oop constructor, oop value);
865
866 // Debugging
867 friend class JavaClasses;
868 };
869
870 class java_lang_reflect_Parameter {
871 private:
872 // Note that to reduce dependencies on the JDK we compute these
873 // offsets at run-time.
874 static int _name_offset;
875 static int _modifiers_offset;
876 static int _index_offset;
877 static int _executable_offset;
878
879 static void compute_offsets();
880
881 public:
882 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
883
884 // Allocation
885 static Handle create(TRAPS);
886
887 // Accessors
888 static oop name(oop field);
889 static void set_name(oop field, oop value);
890
891 static int index(oop reflect);
892 static void set_index(oop reflect, int value);
893
894 static int modifiers(oop reflect);
895 static void set_modifiers(oop reflect, int value);
896
897 static oop executable(oop constructor);
898 static void set_executable(oop constructor, oop value);
899
900 friend class JavaClasses;
901 };
902
903 #define MODULE_INJECTED_FIELDS(macro) \
904 macro(java_lang_Module, module_entry, intptr_signature, false)
905
906 class java_lang_Module {
907 private:
908 static int _loader_offset;
909 static int _name_offset;
910 static int _module_entry_offset;
911
912 static void compute_offsets();
913
914 public:
915 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
916
917 // Allocation
918 static Handle create(Handle loader, Handle module_name, TRAPS);
919
920 // Testers
921 static bool is_instance(oop obj);
922
923 // Accessors
924 static oop loader(oop module);
925 static void set_loader(oop module, oop value);
926
927 // CDS
928 static int module_entry_offset() { return _module_entry_offset; }
929
930 static oop name(oop module);
931 static void set_name(oop module, oop value);
932
933 static ModuleEntry* module_entry(oop module);
934 static ModuleEntry* module_entry_raw(oop module);
935 static void set_module_entry(oop module, ModuleEntry* module_entry);
936
937 friend class JavaClasses;
938 };
939
940 // Interface to jdk.internal.reflect.ConstantPool objects
941 class reflect_ConstantPool {
942 private:
943 // Note that to reduce dependencies on the JDK we compute these
944 // offsets at run-time.
945 static int _oop_offset;
946
947 static void compute_offsets();
948
949 public:
950 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
951
952 // Allocation
953 static Handle create(TRAPS);
954
955 // Accessors
956 static void set_cp(oop reflect, ConstantPool* value);
957 static int oop_offset() { CHECK_INIT(_oop_offset); }
958
959 static ConstantPool* get_cp(oop reflect);
960
961 // Debugging
962 friend class JavaClasses;
963 };
964
965
966 // Interface to java.lang primitive type boxing objects:
967 // - java.lang.Boolean
968 // - java.lang.Character
969 // - java.lang.Float
970 // - java.lang.Double
971 // - java.lang.Byte
972 // - java.lang.Short
973 // - java.lang.Integer
974 // - java.lang.Long
975
976 // This could be separated out into 8 individual classes.
977
978 class java_lang_boxing_object: AllStatic {
979 private:
980 static int _value_offset;
981 static int _long_value_offset;
982
983 static void compute_offsets();
984 static oop initialize_and_allocate(BasicType type, TRAPS);
985 public:
986 // Allocation. Returns a boxed value, or null for invalid type.
987 static oop create(BasicType type, jvalue* value, TRAPS);
988 // Accessors. Returns the basic type being boxed, or T_ILLEGAL for invalid oop.
989 static BasicType get_value(oop box, jvalue* value);
990 static BasicType set_value(oop box, jvalue* value);
991 static BasicType basic_type(oop box);
992 static bool is_instance(oop box) { return basic_type(box) != T_ILLEGAL; }
993 static bool is_instance(oop box, BasicType type) { return basic_type(box) == type; }
994 static void print(oop box, outputStream* st) { jvalue value; print(get_value(box, &value), &value, st); }
995 static void print(BasicType type, jvalue* value, outputStream* st);
996
997 static int value_offset(BasicType type) {
998 return is_double_word_type(type) ? _long_value_offset : _value_offset;
999 }
1000
1001 static void serialize_offsets(SerializeClosure* f);
1002
1003 // Debugging
1004 friend class JavaClasses;
1005 };
1006
1007
1008
1009 // Interface to java.lang.ref.Reference objects
1010
1011 class java_lang_ref_Reference: AllStatic {
1012 static int _referent_offset;
1013 static int _queue_offset;
1014 static int _next_offset;
1015 static int _discovered_offset;
1016
1017 static bool _offsets_initialized;
1018
1019 public:
1020 // Accessors
1021 static inline oop weak_referent_no_keepalive(oop ref);
1022 static inline oop weak_referent(oop ref);
1023 static inline oop phantom_referent_no_keepalive(oop ref);
1024 static inline oop unknown_referent_no_keepalive(oop ref);
1025 static inline void clear_referent(oop ref);
1026 static inline void clear_referent_raw(oop ref);
1027 static inline HeapWord* referent_addr_raw(oop ref);
1028 static inline oop next(oop ref);
1029 static inline void set_next(oop ref, oop value);
1030 static inline void set_next_raw(oop ref, oop value);
1031 static inline HeapWord* next_addr_raw(oop ref);
1032 static inline oop discovered(oop ref);
1033 static inline void set_discovered(oop ref, oop value);
1034 static inline void set_discovered_raw(oop ref, oop value);
1035 static inline HeapWord* discovered_addr_raw(oop ref);
1036 static bool is_referent_field(oop obj, ptrdiff_t offset);
1037 static inline bool is_final(oop ref);
1038 static inline bool is_phantom(oop ref);
1039 static inline bool is_weak(oop ref);
1040 static inline bool is_soft(oop ref);
1041
1042 static int referent_offset() { CHECK_INIT(_referent_offset); }
1043 static int queue_offset() { CHECK_INIT(_queue_offset); }
1044 static int next_offset() { CHECK_INIT(_next_offset); }
1045 static int discovered_offset() { CHECK_INIT(_discovered_offset); }
1046
1047 static void compute_offsets();
1048 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1049 };
1050
1051
1052 // Interface to java.lang.ref.SoftReference objects
1053
1054 class java_lang_ref_SoftReference: public java_lang_ref_Reference {
1055 static int _timestamp_offset;
1056 static int _static_clock_offset;
1057
1058 public:
1059 // Accessors
1060 static jlong timestamp(oop ref);
1061
1062 // Accessors for statics
1063 static jlong clock();
1064 static void set_clock(jlong value);
1065
1066 static void compute_offsets();
1067 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1068 };
1069
1070 // Interface to java.lang.invoke.MethodHandle objects
1071
1072 class java_lang_invoke_MethodHandle: AllStatic {
1073 friend class JavaClasses;
1074
1075 private:
1076 static int _type_offset; // the MethodType of this MH
1077 static int _form_offset; // the LambdaForm of this MH
1078
1079 static void compute_offsets();
1080
1081 public:
1082 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1083
1084 // Accessors
1085 static oop type(oop mh);
1086 static void set_type(oop mh, oop mtype);
1087
1088 static oop form(oop mh);
1089 static void set_form(oop mh, oop lform);
1090
1091 // Testers
1092 static bool is_subclass(Klass* klass) {
1093 return klass->is_subclass_of(vmClasses::MethodHandle_klass());
1094 }
1095 static bool is_instance(oop obj);
1096
1097 // Accessors for code generation:
1098 static int type_offset() { CHECK_INIT(_type_offset); }
1099 static int form_offset() { CHECK_INIT(_form_offset); }
1100 };
1101
1102 // Interface to java.lang.invoke.DirectMethodHandle objects
1103
1104 class java_lang_invoke_DirectMethodHandle: AllStatic {
1105 friend class JavaClasses;
1106
1107 private:
1108 static int _member_offset; // the MemberName of this DMH
1109
1110 static void compute_offsets();
1111
1112 public:
1113 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1114
1115 // Accessors
1116 static oop member(oop mh);
1117
1118 // Testers
1119 static bool is_subclass(Klass* klass) {
1120 return klass->is_subclass_of(vmClasses::DirectMethodHandle_klass());
1121 }
1122 static bool is_instance(oop obj);
1123
1124 // Accessors for code generation:
1125 static int member_offset() { CHECK_INIT(_member_offset); }
1126 };
1127
1128 // Interface to java.lang.invoke.LambdaForm objects
1129 // (These are a private interface for managing adapter code generation.)
1130
1131 class java_lang_invoke_LambdaForm: AllStatic {
1132 friend class JavaClasses;
1133
1134 private:
1135 static int _vmentry_offset; // type is MemberName
1136
1137 static void compute_offsets();
1138
1139 public:
1140 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1141
1142 // Accessors
1143 static oop vmentry(oop lform);
1144
1145 // Testers
1146 static bool is_subclass(Klass* klass) {
1147 return vmClasses::LambdaForm_klass() != nullptr &&
1148 klass->is_subclass_of(vmClasses::LambdaForm_klass());
1149 }
1150 static bool is_instance(oop obj);
1151
1152 // Accessors for code generation:
1153 static int vmentry_offset() { CHECK_INIT(_vmentry_offset); }
1154 };
1155
1156 // Interface to java.lang.invoke.NativeEntryPoint objects
1157 // (These are a private interface for managing adapter code generation.)
1158
1159 class jdk_internal_foreign_abi_NativeEntryPoint: AllStatic {
1160 friend class JavaClasses;
1161
1162 private:
1163 static int _method_type_offset;
1164 static int _downcall_stub_address_offset;
1165
1166 static void compute_offsets();
1167
1168 public:
1169 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1170
1171 // Accessors
1172 static oop method_type(oop entry);
1173 static jlong downcall_stub_address(oop entry);
1174
1175 // Testers
1176 static bool is_subclass(Klass* klass) {
1177 return vmClasses::NativeEntryPoint_klass() != nullptr &&
1178 klass->is_subclass_of(vmClasses::NativeEntryPoint_klass());
1179 }
1180 static bool is_instance(oop obj);
1181
1182 // Accessors for code generation:
1183 static int method_type_offset_in_bytes() { return _method_type_offset; }
1184 static int downcall_stub_address_offset_in_bytes() { return _downcall_stub_address_offset; }
1185 };
1186
1187 class jdk_internal_foreign_abi_ABIDescriptor: AllStatic {
1188 friend class JavaClasses;
1189
1190 private:
1191 static int _inputStorage_offset;
1192 static int _outputStorage_offset;
1193 static int _volatileStorage_offset;
1194 static int _stackAlignment_offset;
1195 static int _shadowSpace_offset;
1196 static int _scratch1_offset;
1197 static int _scratch2_offset;
1198
1199 static void compute_offsets();
1200
1201 public:
1202 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1203
1204 // Accessors
1205 static objArrayOop inputStorage(oop entry);
1206 static objArrayOop outputStorage(oop entry);
1207 static objArrayOop volatileStorage(oop entry);
1208 static jint stackAlignment(oop entry);
1209 static jint shadowSpace(oop entry);
1210 static oop scratch1(oop entry);
1211 static oop scratch2(oop entry);
1212
1213 // Testers
1214 static bool is_subclass(Klass* klass) {
1215 return vmClasses::ABIDescriptor_klass() != nullptr &&
1216 klass->is_subclass_of(vmClasses::ABIDescriptor_klass());
1217 }
1218 static bool is_instance(oop obj);
1219 };
1220
1221 class jdk_internal_foreign_abi_VMStorage: AllStatic {
1222 friend class JavaClasses;
1223
1224 private:
1225 static int _type_offset;
1226 static int _indexOrOffset_offset;
1227 static int _segmentMaskOrSize_offset;
1228 static int _debugName_offset;
1229
1230 static void compute_offsets();
1231
1232 public:
1233 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1234
1235 // Accessors
1236 static jbyte type(oop entry);
1237 static jint index_or_offset(oop entry);
1238 static jshort segment_mask_or_size(oop entry);
1239 static oop debugName(oop entry);
1240
1241 // Testers
1242 static bool is_subclass(Klass* klass) {
1243 return vmClasses::VMStorage_klass() != nullptr &&
1244 klass->is_subclass_of(vmClasses::VMStorage_klass());
1245 }
1246 static bool is_instance(oop obj);
1247 };
1248
1249 class jdk_internal_foreign_abi_CallConv: AllStatic {
1250 friend class JavaClasses;
1251
1252 private:
1253 static int _argRegs_offset;
1254 static int _retRegs_offset;
1255
1256 static void compute_offsets();
1257
1258 public:
1259 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1260
1261 // Accessors
1262 static objArrayOop argRegs(oop entry);
1263 static objArrayOop retRegs(oop entry);
1264
1265 // Testers
1266 static bool is_subclass(Klass* klass) {
1267 return vmClasses::CallConv_klass() != nullptr &&
1268 klass->is_subclass_of(vmClasses::CallConv_klass());
1269 }
1270 static bool is_instance(oop obj);
1271 };
1272
1273 // Interface to java.lang.invoke.MemberName objects
1274 // (These are a private interface for Java code to query the class hierarchy.)
1275
1276 #define RESOLVEDMETHOD_INJECTED_FIELDS(macro) \
1277 macro(java_lang_invoke_ResolvedMethodName, vmtarget, intptr_signature, false)
1278
1279 class java_lang_invoke_ResolvedMethodName : AllStatic {
1280 friend class JavaClasses;
1281
1282 static int _vmtarget_offset;
1283 static int _vmholder_offset;
1284
1285 static void compute_offsets();
1286 public:
1287 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1288
1289 static int vmtarget_offset() { CHECK_INIT(_vmtarget_offset); }
1290
1291 static Method* vmtarget(oop resolved_method);
1292 static void set_vmtarget(oop resolved_method, Method* method);
1293
1294 static void set_vmholder(oop resolved_method, oop holder);
1295
1296 // find or create resolved member name
1297 static oop find_resolved_method(const methodHandle& m, TRAPS);
1298
1299 static bool is_instance(oop resolved_method);
1300 };
1301
1302
1303 #define MEMBERNAME_INJECTED_FIELDS(macro) \
1304 macro(java_lang_invoke_MemberName, vmindex, intptr_signature, false)
1305
1306
1307 class java_lang_invoke_MemberName: AllStatic {
1308 friend class JavaClasses;
1309
1310 private:
1311 // From java.lang.invoke.MemberName:
1312 // private Class<?> clazz; // class in which the method is defined
1313 // private String name; // may be null if not yet materialized
1314 // private Object type; // may be null if not yet materialized
1315 // private int flags; // modifier bits; see reflect.Modifier
1316 // private ResolvedMethodName method; // holds VM-specific target value
1317 // private intptr_t vmindex; // member index within class or interface
1318 static int _clazz_offset;
1319 static int _name_offset;
1320 static int _type_offset;
1321 static int _flags_offset;
1322 static int _method_offset;
1323 static int _vmindex_offset;
1324
1325 static void compute_offsets();
1326
1327 public:
1328 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1329 // Accessors
1330 static oop clazz(oop mname);
1331 static void set_clazz(oop mname, oop clazz);
1332
1333 static oop type(oop mname);
1334 static void set_type(oop mname, oop type);
1335
1336 static oop name(oop mname);
1337 static void set_name(oop mname, oop name);
1338
1339 static int flags(oop mname);
1340 static void set_flags(oop mname, int flags);
1341
1342 // Link through ResolvedMethodName field to get Method*
1343 static Method* vmtarget(oop mname);
1344 static void set_method(oop mname, oop method);
1345
1346 static intptr_t vmindex(oop mname);
1347 static void set_vmindex(oop mname, intptr_t index);
1348
1349 // Testers
1350 static bool is_subclass(Klass* klass) {
1351 return klass->is_subclass_of(vmClasses::MemberName_klass());
1352 }
1353 static bool is_instance(oop obj);
1354
1355 static bool is_method(oop obj);
1356
1357 // Relevant integer codes (keep these in synch. with MethodHandleNatives.Constants):
1358 enum {
1359 MN_IS_METHOD = 0x00010000, // method (not constructor)
1360 MN_IS_CONSTRUCTOR = 0x00020000, // constructor
1361 MN_IS_FIELD = 0x00040000, // field
1362 MN_IS_TYPE = 0x00080000, // nested type
1363 MN_CALLER_SENSITIVE = 0x00100000, // @CallerSensitive annotation detected
1364 MN_TRUSTED_FINAL = 0x00200000, // trusted final field
1365 MN_HIDDEN_MEMBER = 0x00400000, // @Hidden annotation detected
1366 MN_REFERENCE_KIND_SHIFT = 24, // refKind
1367 MN_REFERENCE_KIND_MASK = 0x0F000000 >> MN_REFERENCE_KIND_SHIFT,
1368 MN_NESTMATE_CLASS = 0x00000001,
1369 MN_HIDDEN_CLASS = 0x00000002,
1370 MN_STRONG_LOADER_LINK = 0x00000004,
1371 MN_ACCESS_VM_ANNOTATIONS = 0x00000008,
1372 // Lookup modes
1373 MN_MODULE_MODE = 0x00000010,
1374 MN_UNCONDITIONAL_MODE = 0x00000020,
1375 MN_TRUSTED_MODE = -1
1376 };
1377
1378 // Accessors for code generation:
1379 static int clazz_offset() { CHECK_INIT(_clazz_offset); }
1380 static int type_offset() { CHECK_INIT(_type_offset); }
1381 static int flags_offset() { CHECK_INIT(_flags_offset); }
1382 static int method_offset() { CHECK_INIT(_method_offset); }
1383 static int vmindex_offset() { CHECK_INIT(_vmindex_offset); }
1384 };
1385
1386
1387 // Interface to java.lang.invoke.MethodType objects
1388
1389 class java_lang_invoke_MethodType: AllStatic {
1390 friend class JavaClasses;
1391
1392 private:
1393 static int _rtype_offset;
1394 static int _ptypes_offset;
1395
1396 static void compute_offsets();
1397
1398 public:
1399 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1400 // Accessors
1401 static oop rtype(oop mt);
1402 static objArrayOop ptypes(oop mt);
1403
1404 static oop ptype(oop mt, int index);
1405 static int ptype_count(oop mt);
1406
1407 static int ptype_slot_count(oop mt); // extra counts for long/double
1408 static int rtype_slot_count(oop mt); // extra counts for long/double
1409
1410 static Symbol* as_signature(oop mt, bool intern_if_not_found);
1411 static void print_signature(oop mt, outputStream* st);
1412
1413 static bool is_instance(oop obj);
1414
1415 static bool equals(oop mt1, oop mt2);
1416
1417 // Accessors for code generation:
1418 static int rtype_offset() { CHECK_INIT(_rtype_offset); }
1419 static int ptypes_offset() { CHECK_INIT(_ptypes_offset); }
1420 };
1421
1422
1423 // Interface to java.lang.invoke.CallSite objects
1424 #define CALLSITE_INJECTED_FIELDS(macro) \
1425 macro(java_lang_invoke_CallSite, vmdependencies, intptr_signature, false) \
1426 macro(java_lang_invoke_CallSite, last_cleanup, long_signature, false)
1427
1428 class java_lang_invoke_CallSite: AllStatic {
1429 friend class JavaClasses;
1430
1431 private:
1432 static int _target_offset;
1433 static int _vmdependencies_offset;
1434 static int _last_cleanup_offset;
1435
1436 static void compute_offsets();
1437
1438 public:
1439 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1440 // Accessors
1441 static oop target( oop site);
1442 static void set_target( oop site, oop target);
1443 static void set_target_volatile( oop site, oop target);
1444
1445 static DependencyContext vmdependencies(oop call_site);
1446
1447 // Testers
1448 static bool is_subclass(Klass* klass) {
1449 return klass->is_subclass_of(vmClasses::CallSite_klass());
1450 }
1451 static bool is_instance(oop obj);
1452
1453 // Accessors for code generation:
1454 static int target_offset() { CHECK_INIT(_target_offset); }
1455 };
1456
1457 // Interface to java.lang.invoke.ConstantCallSite objects
1458
1459 class java_lang_invoke_ConstantCallSite: AllStatic {
1460 friend class JavaClasses;
1461
1462 private:
1463 static int _is_frozen_offset;
1464
1465 static void compute_offsets();
1466
1467 public:
1468 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1469 // Accessors
1470 static jboolean is_frozen(oop site);
1471
1472 // Testers
1473 static bool is_subclass(Klass* klass) {
1474 return klass->is_subclass_of(vmClasses::ConstantCallSite_klass());
1475 }
1476 static bool is_instance(oop obj);
1477 };
1478
1479 // Interface to java.lang.ClassLoader objects
1480
1481 #define CLASSLOADER_INJECTED_FIELDS(macro) \
1482 macro(java_lang_ClassLoader, loader_data, intptr_signature, false)
1483
1484 class java_lang_ClassLoader : AllStatic {
1485 private:
1486 static int _loader_data_offset;
1487 static int _parent_offset;
1488 static int _parallelCapable_offset;
1489 static int _name_offset;
1490 static int _nameAndId_offset;
1491 static int _unnamedModule_offset;
1492
1493 static void compute_offsets();
1494
1495 public:
1496 // Support for CDS
1497 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1498 static int loader_data_offset() { return _loader_data_offset; }
1499
1500 static ClassLoaderData* loader_data_acquire(oop loader);
1501 static ClassLoaderData* loader_data(oop loader);
1502 static void release_set_loader_data(oop loader, ClassLoaderData* new_data);
1503
1504 static oop parent(oop loader);
1505 static oop parent_no_keepalive(oop loader);
1506 static oop name(oop loader);
1507 static oop nameAndId(oop loader);
1508 static bool isAncestor(oop loader, oop cl);
1509
1510 // Support for parallelCapable field
1511 static bool parallelCapable(oop the_class_mirror);
1512
1513 static bool is_trusted_loader(oop loader);
1514
1515 // Testers
1516 static bool is_subclass(Klass* klass) {
1517 return klass->is_subclass_of(vmClasses::ClassLoader_klass());
1518 }
1519 static bool is_instance(oop obj);
1520
1521 static oop unnamedModule(oop loader);
1522
1523 // Debugging
1524 friend class JavaClasses;
1525 };
1526
1527
1528 // Interface to java.lang.System objects
1529
1530 class java_lang_System : AllStatic {
1531 private:
1532 static int _static_in_offset;
1533 static int _static_out_offset;
1534 static int _static_err_offset;
1535
1536 public:
1537 static int in_offset() { CHECK_INIT(_static_in_offset); }
1538 static int out_offset() { CHECK_INIT(_static_out_offset); }
1539 static int err_offset() { CHECK_INIT(_static_err_offset); }
1540
1541 static void compute_offsets();
1542 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1543
1544 // Debugging
1545 friend class JavaClasses;
1546 };
1547
1548
1549 // Interface to java.lang.StackTraceElement objects
1550
1551 class java_lang_StackTraceElement: AllStatic {
1552 private:
1553 static int _declaringClassObject_offset;
1554 static int _classLoaderName_offset;
1555 static int _moduleName_offset;
1556 static int _moduleVersion_offset;
1557 static int _declaringClass_offset;
1558 static int _methodName_offset;
1559 static int _fileName_offset;
1560 static int _lineNumber_offset;
1561
1562 // Setters
1563 static void set_classLoaderName(oop element, oop value);
1564 static void set_moduleName(oop element, oop value);
1565 static void set_moduleVersion(oop element, oop value);
1566 static void set_declaringClass(oop element, oop value);
1567 static void set_methodName(oop element, oop value);
1568 static void set_fileName(oop element, oop value);
1569 static void set_lineNumber(oop element, int value);
1570 static void set_declaringClassObject(oop element, oop value);
1571
1572 static void decode_file_and_line(Handle java_mirror, InstanceKlass* holder, int version,
1573 const methodHandle& method, int bci,
1574 Symbol*& source, oop& source_file, int& line_number, TRAPS);
1575
1576 public:
1577 // Create an instance of StackTraceElement
1578 static oop create(const methodHandle& method, int bci, TRAPS);
1579
1580 static void fill_in(Handle element, InstanceKlass* holder, const methodHandle& method,
1581 int version, int bci, Symbol* name, TRAPS);
1582
1583 static void compute_offsets();
1584 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1585
1586 #if INCLUDE_JVMCI
1587 static void decode(const methodHandle& method, int bci, Symbol*& fileName, int& lineNumber, TRAPS);
1588 #endif
1589
1590 // Debugging
1591 friend class JavaClasses;
1592 };
1593
1594
1595 class Backtrace: AllStatic {
1596 public:
1597 // Helper backtrace functions to store bci|version together.
1598 static int merge_bci_and_version(int bci, int version);
1599 static int merge_mid_and_cpref(int mid, int cpref);
1600 static int bci_at(unsigned int merged);
1601 static int version_at(unsigned int merged);
1602 static int mid_at(unsigned int merged);
1603 static int cpref_at(unsigned int merged);
1604 static int get_line_number(Method* method, int bci);
1605 static Symbol* get_source_file_name(InstanceKlass* holder, int version);
1606
1607 // Debugging
1608 friend class JavaClasses;
1609 };
1610
1611 class java_lang_ClassFrameInfo: AllStatic {
1612 private:
1613 static int _classOrMemberName_offset;
1614 static int _flags_offset;
1615
1616 public:
1617 static oop classOrMemberName(oop info);
1618 static int flags(oop info);
1619
1620 // Setters
1621 static void init_class(Handle stackFrame, const methodHandle& m);
1622 static void init_method(Handle stackFrame, const methodHandle& m, TRAPS);
1623
1624 static void compute_offsets();
1625 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1626
1627 // Debugging
1628 friend class JavaClasses;
1629 };
1630
1631 // Interface to java.lang.StackFrameInfo objects
1632
1633 #define STACKFRAMEINFO_INJECTED_FIELDS(macro) \
1634 macro(java_lang_StackFrameInfo, version, short_signature, false)
1635
1636 class java_lang_StackFrameInfo: AllStatic {
1637 private:
1638 static int _type_offset;
1639 static int _name_offset;
1640 static int _bci_offset;
1641 static int _version_offset;
1642 static int _contScope_offset;
1643
1644 public:
1645 // Getters
1646 static oop name(oop info);
1647 static oop type(oop info);
1648 static Method* get_method(oop info);
1649
1650 // Setters
1651 static void set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, oop cont, TRAPS);
1652 static void set_name(oop info, oop value);
1653 static void set_type(oop info, oop value);
1654 static void set_bci(oop info, int value);
1655
1656 static void set_version(oop info, short value);
1657 static void set_contScope(oop info, oop value);
1658
1659 static void compute_offsets();
1660 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1661
1662 static void to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS);
1663
1664 // Debugging
1665 friend class JavaClasses;
1666 };
1667
1668 class java_lang_LiveStackFrameInfo: AllStatic {
1669 private:
1670 static int _monitors_offset;
1671 static int _locals_offset;
1672 static int _operands_offset;
1673 static int _mode_offset;
1674
1675 public:
1676 static void set_monitors(oop info, oop value);
1677 static void set_locals(oop info, oop value);
1678 static void set_operands(oop info, oop value);
1679 static void set_mode(oop info, int value);
1680
1681 static void compute_offsets();
1682 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1683
1684 // Debugging
1685 friend class JavaClasses;
1686 };
1687
1688 // Interface to java.lang.reflect.RecordComponent objects
1689
1690 class java_lang_reflect_RecordComponent: AllStatic {
1691 private:
1692 static int _clazz_offset;
1693 static int _name_offset;
1694 static int _type_offset;
1695 static int _accessor_offset;
1696 static int _signature_offset;
1697 static int _annotations_offset;
1698 static int _typeAnnotations_offset;
1699
1700 // Setters
1701 static void set_clazz(oop element, oop value);
1702 static void set_name(oop element, oop value);
1703 static void set_type(oop element, oop value);
1704 static void set_accessor(oop element, oop value);
1705 static void set_signature(oop element, oop value);
1706 static void set_annotations(oop element, oop value);
1707 static void set_typeAnnotations(oop element, oop value);
1708
1709 public:
1710 // Create an instance of RecordComponent
1711 static oop create(InstanceKlass* holder, RecordComponent* component, TRAPS);
1712
1713 static void compute_offsets();
1714 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1715
1716 // Debugging
1717 friend class JavaClasses;
1718 };
1719
1720
1721 // Interface to java.lang.AssertionStatusDirectives objects
1722
1723 class java_lang_AssertionStatusDirectives: AllStatic {
1724 private:
1725 static int _classes_offset;
1726 static int _classEnabled_offset;
1727 static int _packages_offset;
1728 static int _packageEnabled_offset;
1729 static int _deflt_offset;
1730
1731 public:
1732 // Setters
1733 static void set_classes(oop obj, oop val);
1734 static void set_classEnabled(oop obj, oop val);
1735 static void set_packages(oop obj, oop val);
1736 static void set_packageEnabled(oop obj, oop val);
1737 static void set_deflt(oop obj, bool val);
1738
1739 static void compute_offsets();
1740 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1741
1742 // Debugging
1743 friend class JavaClasses;
1744 };
1745
1746
1747 class java_util_concurrent_locks_AbstractOwnableSynchronizer : AllStatic {
1748 private:
1749 static int _owner_offset;
1750 public:
1751 static void compute_offsets();
1752 static oop get_owner_threadObj(oop obj);
1753 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1754 };
1755
1756 // Interface to jdk.internal.misc.UnsafeConsants
1757
1758 class jdk_internal_misc_UnsafeConstants : AllStatic {
1759 public:
1760 static void set_unsafe_constants();
1761 static void compute_offsets() { }
1762 static void serialize_offsets(SerializeClosure* f) { }
1763 };
1764
1765 // Interface to jdk.internal.vm.vector.VectorSupport.VectorPayload objects
1766
1767 class vector_VectorPayload : AllStatic {
1768 private:
1769 static int _payload_offset;
1770 public:
1771 static void set_payload(oop o, oop val);
1772
1773 static void compute_offsets();
1774 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1775
1776 // Testers
1777 static bool is_subclass(Klass* klass) {
1778 return klass->is_subclass_of(vmClasses::vector_VectorPayload_klass());
1779 }
1780 static bool is_instance(oop obj);
1781 };
1782
1783 class java_lang_Integer : AllStatic {
1784 public:
1785 static jint value(oop obj);
1786 };
1787
1788 class java_lang_Long : AllStatic {
1789 public:
1790 static jlong value(oop obj);
1791 };
1792
1793 class java_lang_Character : AllStatic {
1794 public:
1795 static jchar value(oop obj);
1796 };
1797
1798 class java_lang_Short : AllStatic {
1799 public:
1800 static jshort value(oop obj);
1801 };
1802
1803 class java_lang_Byte : AllStatic {
1804 public:
1805 static jbyte value(oop obj);
1806 };
1807
1808 class java_lang_Boolean : AllStatic {
1809 private:
1810 static int _static_TRUE_offset;
1811 static int _static_FALSE_offset;
1812 public:
1813 static Symbol* symbol();
1814 static void compute_offsets(InstanceKlass* k);
1815 static oop get_TRUE(InstanceKlass *k);
1816 static oop get_FALSE(InstanceKlass *k);
1817 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1818 static jboolean value(oop obj);
1819 };
1820
1821 class java_lang_Integer_IntegerCache : AllStatic {
1822 private:
1823 static int _static_cache_offset;
1824 public:
1825 static Symbol* symbol();
1826 static void compute_offsets(InstanceKlass* k);
1827 static objArrayOop cache(InstanceKlass *k);
1828 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1829 };
1830
1831 class java_lang_Long_LongCache : AllStatic {
1832 private:
1833 static int _static_cache_offset;
1834 public:
1835 static Symbol* symbol();
1836 static void compute_offsets(InstanceKlass* k);
1837 static objArrayOop cache(InstanceKlass *k);
1838 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1839 };
1840
1841 class java_lang_Character_CharacterCache : AllStatic {
1842 private:
1843 static int _static_cache_offset;
1844 public:
1845 static Symbol* symbol();
1846 static void compute_offsets(InstanceKlass* k);
1847 static objArrayOop cache(InstanceKlass *k);
1848 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1849 };
1850
1851 class java_lang_Short_ShortCache : AllStatic {
1852 private:
1853 static int _static_cache_offset;
1854 public:
1855 static Symbol* symbol();
1856 static void compute_offsets(InstanceKlass* k);
1857 static objArrayOop cache(InstanceKlass *k);
1858 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1859 };
1860
1861 class java_lang_Byte_ByteCache : AllStatic {
1862 private:
1863 static int _static_cache_offset;
1864 public:
1865 static Symbol* symbol();
1866 static void compute_offsets(InstanceKlass* k);
1867 static objArrayOop cache(InstanceKlass *k);
1868 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1869 };
1870
1871
1872 // Interface to java.lang.InternalError objects
1873
1874 #define INTERNALERROR_INJECTED_FIELDS(macro) \
1875 macro(java_lang_InternalError, during_unsafe_access, bool_signature, false)
1876
1877 class java_lang_InternalError : AllStatic {
1878 private:
1879 static int _during_unsafe_access_offset;
1880 public:
1881 static jboolean during_unsafe_access(oop internal_error);
1882 static void set_during_unsafe_access(oop internal_error);
1883 static void compute_offsets();
1884 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1885 };
1886
1887 // Use to declare fields that need to be injected into Java classes
1888 // for the JVM to use. The name_index and signature_index are
1889 // declared in vmSymbols. The may_be_java flag is used to declare
1890 // fields that might already exist in Java but should be injected if
1891 // they don't. Otherwise the field is unconditionally injected and
1892 // the JVM uses the injected one. This is to ensure that name
1893 // collisions don't occur. In general may_be_java should be false
1894 // unless there's a good reason.
1895
1896 class InjectedField {
1897 public:
1898 const vmClassID klass_id;
1899 const vmSymbolID name_index;
1900 const vmSymbolID signature_index;
1901 const bool may_be_java;
1902
1903
1904 Klass* klass() const { return vmClasses::klass_at(klass_id); }
1905 Symbol* name() const { return lookup_symbol(name_index); }
1906 Symbol* signature() const { return lookup_symbol(signature_index); }
1907
1908 int compute_offset();
1909
1910 // Find the Symbol for this index
1911 static Symbol* lookup_symbol(vmSymbolID symbol_index) {
1912 return Symbol::vm_symbol_at(symbol_index);
1913 }
1914 };
1915
1916
1917 // Interface to hard-coded offset checking
1918
1919 enum class InjectedFieldID : int;
1920
1921 class JavaClasses : AllStatic {
1922 private:
1923
1924 static InjectedField _injected_fields[];
1925
1926 static bool check_offset(const char *klass_name, int offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1927 public:
1928
1929 static int compute_injected_offset(InjectedFieldID id);
1930
1931 static void compute_offsets();
1932 static void check_offsets() PRODUCT_RETURN;
1933 static void serialize_offsets(SerializeClosure* soc) NOT_CDS_RETURN;
1934 static InjectedField* get_injected(Symbol* class_name, int* field_count);
1935 static bool is_supported_for_archiving(oop obj) NOT_CDS_JAVA_HEAP_RETURN_(false);
1936
1937 static void compute_offset(int &dest_offset,
1938 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol,
1939 bool is_static = false);
1940 static void compute_offset(int& dest_offset, InstanceKlass* ik,
1941 const char* name_string, Symbol* signature_symbol,
1942 bool is_static = false);
1943 };
1944
1945 #undef CHECK_INIT
1946
1947 #endif // SHARE_CLASSFILE_JAVACLASSES_HPP