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, Handle protection_domain, 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
332 static oop reflection_data(oop java_class);
333 static void set_reflection_data(oop java_class, oop reflection_data);
334 static bool has_reflection_data(oop java_class);
335 static int reflection_data_offset() { return _reflectionData_offset; }
336
337 static oop class_loader(oop java_class);
338 static void set_module(oop java_class, oop module);
339 static oop module(oop java_class);
340
341 static oop name(Handle java_class, TRAPS);
342
343 static oop source_file(oop java_class);
344 static void set_source_file(oop java_class, oop source_file);
345
346 static int modifiers(oop java_class);
347 static void set_modifiers(oop java_class, u2 value);
348
349 static int raw_access_flags(oop java_class);
350 static void set_raw_access_flags(oop java_class, u2 value);
351
352 static size_t oop_size(oop java_class);
353 static void set_oop_size(HeapWord* java_class, size_t size);
354 static int static_oop_field_count(oop java_class);
355 static void set_static_oop_field_count(oop java_class, int size);
356
357 static GrowableArray<Klass*>* fixup_mirror_list() {
358 return _fixup_mirror_list;
359 }
360 static void set_fixup_mirror_list(GrowableArray<Klass*>* v) {
361 _fixup_mirror_list = v;
362 }
363
364 static GrowableArray<Klass*>* fixup_module_field_list() {
365 return _fixup_module_field_list;
366 }
367 static void set_fixup_module_field_list(GrowableArray<Klass*>* v) {
368 _fixup_module_field_list = v;
369 }
370
371 // Debugging
372 friend class JavaClasses;
373 };
374
375 // Interface to java.lang.Thread objects
376
377 #define THREAD_INJECTED_FIELDS(macro) \
378 macro(java_lang_Thread, jvmti_thread_state, intptr_signature, false) \
379 macro(java_lang_Thread, jvmti_VTMS_transition_disable_count, int_signature, false) \
380 macro(java_lang_Thread, jvmti_is_in_VTMS_transition, bool_signature, false) \
381 JFR_ONLY(macro(java_lang_Thread, jfr_epoch, short_signature, false))
382
383 class java_lang_Thread : AllStatic {
384 friend class java_lang_VirtualThread;
385 friend class JVMCIVMStructs;
386 private:
387 // Note that for this class the layout changed between JDK1.2 and JDK1.3,
388 // so we compute the offsets at startup rather than hard-wiring them.
389 static int _holder_offset;
390 static int _name_offset;
391 static int _contextClassLoader_offset;
392 static int _eetop_offset;
393 static int _jvmti_thread_state_offset;
394 static int _jvmti_VTMS_transition_disable_count_offset;
395 static int _jvmti_is_in_VTMS_transition_offset;
396 static int _interrupted_offset;
397 static int _interruptLock_offset;
398 static int _tid_offset;
399 static int _continuation_offset;
400 static int _park_blocker_offset;
401 static int _scopedValueBindings_offset;
402 JFR_ONLY(static int _jfr_epoch_offset;)
403
404 static void compute_offsets();
405
406 public:
407 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
408
409 // Returns the JavaThread associated with the thread obj
410 static JavaThread* thread(oop java_thread);
411 static JavaThread* thread_acquire(oop java_thread);
412 // Set JavaThread for instance
413 static void set_thread(oop java_thread, JavaThread* thread);
414 static void release_set_thread(oop java_thread, JavaThread* thread);
415 // FieldHolder
416 static oop holder(oop java_thread);
417 // interruptLock
418 static oop interrupt_lock(oop java_thread);
419 // Interrupted status
420 static bool interrupted(oop java_thread);
421 static void set_interrupted(oop java_thread, bool val);
422 // Name
423 static oop name(oop java_thread);
424 static void set_name(oop java_thread, oop name);
425 // Priority
426 static ThreadPriority priority(oop java_thread);
427 static void set_priority(oop java_thread, ThreadPriority priority);
428 // Thread group
429 static oop threadGroup(oop java_thread);
430 // Alive (NOTE: this is not really a field, but provides the correct
431 // definition without doing a Java call)
432 static bool is_alive(oop java_thread);
433 // Daemon
434 static bool is_daemon(oop java_thread);
435 static void set_daemon(oop java_thread);
436 // Context ClassLoader
437 static oop context_class_loader(oop java_thread);
438 // Stack size hint
439 static jlong stackSize(oop java_thread);
440 // Thread ID
441 static int64_t thread_id(oop java_thread);
442 static ByteSize thread_id_offset();
443 // Continuation
444 static inline oop continuation(oop java_thread);
445
446 static JvmtiThreadState* jvmti_thread_state(oop java_thread);
447 static void set_jvmti_thread_state(oop java_thread, JvmtiThreadState* state);
448 static int VTMS_transition_disable_count(oop java_thread);
449 static void inc_VTMS_transition_disable_count(oop java_thread);
450 static void dec_VTMS_transition_disable_count(oop java_thread);
451 static bool is_in_VTMS_transition(oop java_thread);
452 static void set_is_in_VTMS_transition(oop java_thread, bool val);
453 static int is_in_VTMS_transition_offset();
454
455 // Clear all scoped value bindings on error
456 static void clear_scopedValueBindings(oop java_thread);
457
458 // Blocker object responsible for thread parking
459 static oop park_blocker(oop java_thread);
460
461 // Write thread status info to threadStatus field of java.lang.Thread.
462 static void set_thread_status(oop java_thread_oop, JavaThreadStatus status);
463 // Read thread status info from threadStatus field of java.lang.Thread.
464 static JavaThreadStatus get_thread_status(oop java_thread_oop);
465
466 static const char* thread_status_name(oop java_thread_oop);
467
468 // Fill in current stack trace, can cause GC
469 static oop async_get_stack_trace(jobject jthread, TRAPS);
470
471 JFR_ONLY(static u2 jfr_epoch(oop java_thread);)
472 JFR_ONLY(static void set_jfr_epoch(oop java_thread, u2 epoch);)
473 JFR_ONLY(static int jfr_epoch_offset() { CHECK_INIT(_jfr_epoch_offset); })
474
475 // Debugging
476 friend class JavaClasses;
477 };
478
479 // Interface to java.lang.Thread$FieldHolder objects
480
481 class java_lang_Thread_FieldHolder : AllStatic {
482 private:
483 static int _group_offset;
484 static int _priority_offset;
485 static int _stackSize_offset;
486 static int _daemon_offset;
487 static int _thread_status_offset;
488
489 static void compute_offsets();
490
491 public:
492 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
493
494 static oop threadGroup(oop holder);
495
496 static ThreadPriority priority(oop holder);
497 static void set_priority(oop holder, ThreadPriority priority);
498
499 static jlong stackSize(oop holder);
500
501 static bool is_daemon(oop holder);
502 static void set_daemon(oop holder, bool val);
503
504 static void set_thread_status(oop holder, JavaThreadStatus status);
505 static JavaThreadStatus get_thread_status(oop holder);
506
507 friend class JavaClasses;
508 };
509
510 // Interface to java.lang.Thread$Constants objects
511
512 class java_lang_Thread_Constants : AllStatic {
513 private:
514 static int _static_VTHREAD_GROUP_offset;
515 static int _static_NOT_SUPPORTED_CLASSLOADER_offset;
516
517 static void compute_offsets();
518 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
519
520 public:
521 static oop get_VTHREAD_GROUP();
522
523 friend class JavaClasses;
524 };
525
526 // Interface to java.lang.ThreadGroup objects
527
528 class java_lang_ThreadGroup : AllStatic {
529 private:
530 static int _parent_offset;
531 static int _name_offset;
532 static int _maxPriority_offset;
533 static int _daemon_offset;
534
535 static void compute_offsets();
536 public:
537 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
538
539 // parent ThreadGroup
540 static oop parent(oop java_thread_group);
541 // name
542 static const char* name(oop java_thread_group);
543 // maxPriority in group
544 static ThreadPriority maxPriority(oop java_thread_group);
545 // Daemon
546 static bool is_daemon(oop java_thread_group);
547
548 // Debugging
549 friend class JavaClasses;
550 };
551
552
553 // Interface to java.lang.VirtualThread objects
554 #define VTHREAD_INJECTED_FIELDS(macro) \
555 macro(java_lang_VirtualThread, objectWaiter, intptr_signature, false)
556
557 class java_lang_VirtualThread : AllStatic {
558 private:
559 static int static_vthread_scope_offset;
560 static int _carrierThread_offset;
561 static int _continuation_offset;
562 static int _state_offset;
563 static int _next_offset;
564 static int _onWaitingList_offset;
565 static int _notified_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 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 static oop create_exception_instance(Symbol* class_name, TRAPS);
695
696 // Printing
697 static void print(oop throwable, outputStream* st);
698 static void print_stack_trace(Handle throwable, outputStream* st);
699 static void java_printStackTrace(Handle throwable, TRAPS);
700 // Debugging
701 friend class JavaClasses;
702 // Gets the method and bci of the top frame (TOS). Returns false if this failed.
703 static bool get_top_method_and_bci(oop throwable, Method** method, int* bci);
704 };
705
706
707 // Interface to java.lang.reflect.AccessibleObject objects
708
709 class java_lang_reflect_AccessibleObject: AllStatic {
710 private:
711 // Note that to reduce dependencies on the JDK we compute these
712 // offsets at run-time.
713 static int _override_offset;
714
715 static void compute_offsets();
716
717 public:
718 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
719
720 // Accessors
721 static jboolean override(oop reflect);
722 static void set_override(oop reflect, jboolean value);
723
724 // Debugging
725 friend class JavaClasses;
726 };
727
728
729 // Interface to java.lang.reflect.Method objects
730
731 class java_lang_reflect_Method : public java_lang_reflect_AccessibleObject {
732 private:
733 // Note that to reduce dependencies on the JDK we compute these
734 // offsets at run-time.
735 static int _clazz_offset;
736 static int _name_offset;
737 static int _returnType_offset;
738 static int _parameterTypes_offset;
739 static int _exceptionTypes_offset;
740 static int _slot_offset;
741 static int _modifiers_offset;
742 static int _signature_offset;
743 static int _annotations_offset;
744 static int _parameter_annotations_offset;
745 static int _annotation_default_offset;
746
747 static void compute_offsets();
748 public:
749 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
750
751 // Allocation
752 static Handle create(TRAPS);
753
754 // Accessors
755 static oop clazz(oop reflect);
756 static void set_clazz(oop reflect, oop value);
757
758 static void set_name(oop method, oop value);
759
760 static oop return_type(oop method);
761 static void set_return_type(oop method, oop value);
762
763 static oop parameter_types(oop method);
764 static void set_parameter_types(oop method, oop value);
765
766 static int slot(oop reflect);
767 static void set_slot(oop reflect, int value);
768
769 static void set_exception_types(oop method, oop value);
770 static void set_modifiers(oop method, int value);
771 static void set_signature(oop method, oop value);
772 static void set_annotations(oop method, oop value);
773 static void set_parameter_annotations(oop method, oop value);
774 static void set_annotation_default(oop method, oop value);
775
776 // Debugging
777 friend class JavaClasses;
778 };
779
780
781 // Interface to java.lang.reflect.Constructor objects
782
783 class java_lang_reflect_Constructor : public java_lang_reflect_AccessibleObject {
784 private:
785 // Note that to reduce dependencies on the JDK we compute these
786 // offsets at run-time.
787 static int _clazz_offset;
788 static int _parameterTypes_offset;
789 static int _exceptionTypes_offset;
790 static int _slot_offset;
791 static int _modifiers_offset;
792 static int _signature_offset;
793 static int _annotations_offset;
794 static int _parameter_annotations_offset;
795
796 static void compute_offsets();
797 public:
798 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
799
800 // Allocation
801 static Handle create(TRAPS);
802
803 // Accessors
804 static oop clazz(oop reflect);
805 static void set_clazz(oop reflect, oop value);
806
807 static oop parameter_types(oop constructor);
808 static void set_parameter_types(oop constructor, oop value);
809
810 static int slot(oop reflect);
811 static void set_slot(oop reflect, int value);
812
813 static void set_exception_types(oop constructor, oop value);
814 static void set_modifiers(oop constructor, int value);
815 static void set_signature(oop constructor, oop value);
816 static void set_annotations(oop constructor, oop value);
817 static void set_parameter_annotations(oop method, oop value);
818
819 // Debugging
820 friend class JavaClasses;
821 };
822
823
824 // Interface to java.lang.reflect.Field objects
825
826 class java_lang_reflect_Field : public java_lang_reflect_AccessibleObject {
827 private:
828 // Note that to reduce dependencies on the JDK we compute these
829 // offsets at run-time.
830 static int _clazz_offset;
831 static int _name_offset;
832 static int _type_offset;
833 static int _slot_offset;
834 static int _modifiers_offset;
835 static int _trusted_final_offset;
836 static int _signature_offset;
837 static int _annotations_offset;
838
839 static void compute_offsets();
840
841 public:
842 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
843
844 // Allocation
845 static Handle create(TRAPS);
846
847 // Accessors
848 static oop clazz(oop reflect);
849 static void set_clazz(oop reflect, oop value);
850
851 static oop name(oop field);
852 static void set_name(oop field, oop value);
853
854 static oop type(oop field);
855 static void set_type(oop field, oop value);
856
857 static int slot(oop reflect);
858 static void set_slot(oop reflect, int value);
859
860 static int modifiers(oop field);
861 static void set_modifiers(oop field, int value);
862
863 static void set_trusted_final(oop field);
864
865 static void set_signature(oop constructor, oop value);
866 static void set_annotations(oop constructor, oop value);
867
868 // Debugging
869 friend class JavaClasses;
870 };
871
872 class java_lang_reflect_Parameter {
873 private:
874 // Note that to reduce dependencies on the JDK we compute these
875 // offsets at run-time.
876 static int _name_offset;
877 static int _modifiers_offset;
878 static int _index_offset;
879 static int _executable_offset;
880
881 static void compute_offsets();
882
883 public:
884 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
885
886 // Allocation
887 static Handle create(TRAPS);
888
889 // Accessors
890 static oop name(oop field);
891 static void set_name(oop field, oop value);
892
893 static int index(oop reflect);
894 static void set_index(oop reflect, int value);
895
896 static int modifiers(oop reflect);
897 static void set_modifiers(oop reflect, int value);
898
899 static oop executable(oop constructor);
900 static void set_executable(oop constructor, oop value);
901
902 friend class JavaClasses;
903 };
904
905 #define MODULE_INJECTED_FIELDS(macro) \
906 macro(java_lang_Module, module_entry, intptr_signature, false)
907
908 class java_lang_Module {
909 private:
910 static int _loader_offset;
911 static int _name_offset;
912 static int _module_entry_offset;
913
914 static void compute_offsets();
915
916 public:
917 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
918
919 // Allocation
920 static Handle create(Handle loader, Handle module_name, TRAPS);
921
922 // Testers
923 static bool is_instance(oop obj);
924
925 // Accessors
926 static oop loader(oop module);
927 static void set_loader(oop module, oop value);
928
929 // CDS
930 static int module_entry_offset() { return _module_entry_offset; }
931
932 static oop name(oop module);
933 static void set_name(oop module, oop value);
934
935 static ModuleEntry* module_entry(oop module);
936 static ModuleEntry* module_entry_raw(oop module);
937 static void set_module_entry(oop module, ModuleEntry* module_entry);
938
939 friend class JavaClasses;
940 };
941
942 // Interface to jdk.internal.reflect.ConstantPool objects
943 class reflect_ConstantPool {
944 private:
945 // Note that to reduce dependencies on the JDK we compute these
946 // offsets at run-time.
947 static int _oop_offset;
948
949 static void compute_offsets();
950
951 public:
952 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
953
954 // Allocation
955 static Handle create(TRAPS);
956
957 // Accessors
958 static void set_cp(oop reflect, ConstantPool* value);
959 static int oop_offset() { CHECK_INIT(_oop_offset); }
960
961 static ConstantPool* get_cp(oop reflect);
962
963 // Debugging
964 friend class JavaClasses;
965 };
966
967
968 // Interface to java.lang primitive type boxing objects:
969 // - java.lang.Boolean
970 // - java.lang.Character
971 // - java.lang.Float
972 // - java.lang.Double
973 // - java.lang.Byte
974 // - java.lang.Short
975 // - java.lang.Integer
976 // - java.lang.Long
977
978 // This could be separated out into 8 individual classes.
979
980 class java_lang_boxing_object: AllStatic {
981 private:
982 static int _value_offset;
983 static int _long_value_offset;
984
985 static void compute_offsets();
986 static oop initialize_and_allocate(BasicType type, TRAPS);
987 public:
988 // Allocation. Returns a boxed value, or null for invalid type.
989 static oop create(BasicType type, jvalue* value, TRAPS);
990 // Accessors. Returns the basic type being boxed, or T_ILLEGAL for invalid oop.
991 static BasicType get_value(oop box, jvalue* value);
992 static BasicType set_value(oop box, jvalue* value);
993 static BasicType basic_type(oop box);
994 static bool is_instance(oop box) { return basic_type(box) != T_ILLEGAL; }
995 static bool is_instance(oop box, BasicType type) { return basic_type(box) == type; }
996 static void print(oop box, outputStream* st) { jvalue value; print(get_value(box, &value), &value, st); }
997 static void print(BasicType type, jvalue* value, outputStream* st);
998
999 static int value_offset(BasicType type) {
1000 return is_double_word_type(type) ? _long_value_offset : _value_offset;
1001 }
1002
1003 static void serialize_offsets(SerializeClosure* f);
1004
1005 // Debugging
1006 friend class JavaClasses;
1007 };
1008
1009
1010
1011 // Interface to java.lang.ref.Reference objects
1012
1013 class java_lang_ref_Reference: AllStatic {
1014 static int _referent_offset;
1015 static int _queue_offset;
1016 static int _next_offset;
1017 static int _discovered_offset;
1018
1019 static bool _offsets_initialized;
1020
1021 public:
1022 // Accessors
1023 static inline oop weak_referent_no_keepalive(oop ref);
1024 static inline oop weak_referent(oop ref);
1025 static inline oop phantom_referent_no_keepalive(oop ref);
1026 static inline oop unknown_referent_no_keepalive(oop ref);
1027 static inline void clear_referent(oop ref);
1028 static inline void clear_referent_raw(oop ref);
1029 static inline HeapWord* referent_addr_raw(oop ref);
1030 static inline oop next(oop ref);
1031 static inline void set_next(oop ref, oop value);
1032 static inline void set_next_raw(oop ref, oop value);
1033 static inline HeapWord* next_addr_raw(oop ref);
1034 static inline oop discovered(oop ref);
1035 static inline void set_discovered(oop ref, oop value);
1036 static inline void set_discovered_raw(oop ref, oop value);
1037 static inline HeapWord* discovered_addr_raw(oop ref);
1038 static bool is_referent_field(oop obj, ptrdiff_t offset);
1039 static inline bool is_final(oop ref);
1040 static inline bool is_phantom(oop ref);
1041 static inline bool is_weak(oop ref);
1042 static inline bool is_soft(oop ref);
1043
1044 static int referent_offset() { CHECK_INIT(_referent_offset); }
1045 static int queue_offset() { CHECK_INIT(_queue_offset); }
1046 static int next_offset() { CHECK_INIT(_next_offset); }
1047 static int discovered_offset() { CHECK_INIT(_discovered_offset); }
1048
1049 static void compute_offsets();
1050 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1051 };
1052
1053
1054 // Interface to java.lang.ref.SoftReference objects
1055
1056 class java_lang_ref_SoftReference: public java_lang_ref_Reference {
1057 static int _timestamp_offset;
1058 static int _static_clock_offset;
1059
1060 public:
1061 // Accessors
1062 static jlong timestamp(oop ref);
1063
1064 // Accessors for statics
1065 static jlong clock();
1066 static void set_clock(jlong value);
1067
1068 static void compute_offsets();
1069 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1070 };
1071
1072 // Interface to java.lang.invoke.MethodHandle objects
1073
1074 class java_lang_invoke_MethodHandle: AllStatic {
1075 friend class JavaClasses;
1076
1077 private:
1078 static int _type_offset; // the MethodType of this MH
1079 static int _form_offset; // the LambdaForm of this MH
1080
1081 static void compute_offsets();
1082
1083 public:
1084 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1085
1086 // Accessors
1087 static oop type(oop mh);
1088 static void set_type(oop mh, oop mtype);
1089
1090 static oop form(oop mh);
1091 static void set_form(oop mh, oop lform);
1092
1093 // Testers
1094 static bool is_subclass(Klass* klass) {
1095 return klass->is_subclass_of(vmClasses::MethodHandle_klass());
1096 }
1097 static bool is_instance(oop obj);
1098
1099 // Accessors for code generation:
1100 static int type_offset() { CHECK_INIT(_type_offset); }
1101 static int form_offset() { CHECK_INIT(_form_offset); }
1102 };
1103
1104 // Interface to java.lang.invoke.DirectMethodHandle objects
1105
1106 class java_lang_invoke_DirectMethodHandle: AllStatic {
1107 friend class JavaClasses;
1108
1109 private:
1110 static int _member_offset; // the MemberName of this DMH
1111
1112 static void compute_offsets();
1113
1114 public:
1115 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1116
1117 // Accessors
1118 static oop member(oop mh);
1119
1120 // Testers
1121 static bool is_subclass(Klass* klass) {
1122 return klass->is_subclass_of(vmClasses::DirectMethodHandle_klass());
1123 }
1124 static bool is_instance(oop obj);
1125
1126 // Accessors for code generation:
1127 static int member_offset() { CHECK_INIT(_member_offset); }
1128 };
1129
1130 // Interface to java.lang.invoke.LambdaForm objects
1131 // (These are a private interface for managing adapter code generation.)
1132
1133 class java_lang_invoke_LambdaForm: AllStatic {
1134 friend class JavaClasses;
1135
1136 private:
1137 static int _vmentry_offset; // type is MemberName
1138
1139 static void compute_offsets();
1140
1141 public:
1142 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1143
1144 // Accessors
1145 static oop vmentry(oop lform);
1146
1147 // Testers
1148 static bool is_subclass(Klass* klass) {
1149 return vmClasses::LambdaForm_klass() != nullptr &&
1150 klass->is_subclass_of(vmClasses::LambdaForm_klass());
1151 }
1152 static bool is_instance(oop obj);
1153
1154 // Accessors for code generation:
1155 static int vmentry_offset() { CHECK_INIT(_vmentry_offset); }
1156 };
1157
1158 // Interface to java.lang.invoke.NativeEntryPoint objects
1159 // (These are a private interface for managing adapter code generation.)
1160
1161 class jdk_internal_foreign_abi_NativeEntryPoint: AllStatic {
1162 friend class JavaClasses;
1163
1164 private:
1165 static int _method_type_offset;
1166 static int _downcall_stub_address_offset;
1167
1168 static void compute_offsets();
1169
1170 public:
1171 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1172
1173 // Accessors
1174 static oop method_type(oop entry);
1175 static jlong downcall_stub_address(oop entry);
1176
1177 // Testers
1178 static bool is_subclass(Klass* klass) {
1179 return vmClasses::NativeEntryPoint_klass() != nullptr &&
1180 klass->is_subclass_of(vmClasses::NativeEntryPoint_klass());
1181 }
1182 static bool is_instance(oop obj);
1183
1184 // Accessors for code generation:
1185 static int method_type_offset_in_bytes() { return _method_type_offset; }
1186 static int downcall_stub_address_offset_in_bytes() { return _downcall_stub_address_offset; }
1187 };
1188
1189 class jdk_internal_foreign_abi_ABIDescriptor: AllStatic {
1190 friend class JavaClasses;
1191
1192 private:
1193 static int _inputStorage_offset;
1194 static int _outputStorage_offset;
1195 static int _volatileStorage_offset;
1196 static int _stackAlignment_offset;
1197 static int _shadowSpace_offset;
1198 static int _scratch1_offset;
1199 static int _scratch2_offset;
1200
1201 static void compute_offsets();
1202
1203 public:
1204 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1205
1206 // Accessors
1207 static objArrayOop inputStorage(oop entry);
1208 static objArrayOop outputStorage(oop entry);
1209 static objArrayOop volatileStorage(oop entry);
1210 static jint stackAlignment(oop entry);
1211 static jint shadowSpace(oop entry);
1212 static oop scratch1(oop entry);
1213 static oop scratch2(oop entry);
1214
1215 // Testers
1216 static bool is_subclass(Klass* klass) {
1217 return vmClasses::ABIDescriptor_klass() != nullptr &&
1218 klass->is_subclass_of(vmClasses::ABIDescriptor_klass());
1219 }
1220 static bool is_instance(oop obj);
1221 };
1222
1223 class jdk_internal_foreign_abi_VMStorage: AllStatic {
1224 friend class JavaClasses;
1225
1226 private:
1227 static int _type_offset;
1228 static int _indexOrOffset_offset;
1229 static int _segmentMaskOrSize_offset;
1230 static int _debugName_offset;
1231
1232 static void compute_offsets();
1233
1234 public:
1235 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1236
1237 // Accessors
1238 static jbyte type(oop entry);
1239 static jint index_or_offset(oop entry);
1240 static jshort segment_mask_or_size(oop entry);
1241 static oop debugName(oop entry);
1242
1243 // Testers
1244 static bool is_subclass(Klass* klass) {
1245 return vmClasses::VMStorage_klass() != nullptr &&
1246 klass->is_subclass_of(vmClasses::VMStorage_klass());
1247 }
1248 static bool is_instance(oop obj);
1249 };
1250
1251 class jdk_internal_foreign_abi_CallConv: AllStatic {
1252 friend class JavaClasses;
1253
1254 private:
1255 static int _argRegs_offset;
1256 static int _retRegs_offset;
1257
1258 static void compute_offsets();
1259
1260 public:
1261 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1262
1263 // Accessors
1264 static objArrayOop argRegs(oop entry);
1265 static objArrayOop retRegs(oop entry);
1266
1267 // Testers
1268 static bool is_subclass(Klass* klass) {
1269 return vmClasses::CallConv_klass() != nullptr &&
1270 klass->is_subclass_of(vmClasses::CallConv_klass());
1271 }
1272 static bool is_instance(oop obj);
1273 };
1274
1275 // Interface to java.lang.invoke.MemberName objects
1276 // (These are a private interface for Java code to query the class hierarchy.)
1277
1278 #define RESOLVEDMETHOD_INJECTED_FIELDS(macro) \
1279 macro(java_lang_invoke_ResolvedMethodName, vmtarget, intptr_signature, false)
1280
1281 class java_lang_invoke_ResolvedMethodName : AllStatic {
1282 friend class JavaClasses;
1283
1284 static int _vmtarget_offset;
1285 static int _vmholder_offset;
1286
1287 static void compute_offsets();
1288 public:
1289 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1290
1291 static int vmtarget_offset() { CHECK_INIT(_vmtarget_offset); }
1292
1293 static Method* vmtarget(oop resolved_method);
1294 static void set_vmtarget(oop resolved_method, Method* method);
1295
1296 static void set_vmholder(oop resolved_method, oop holder);
1297
1298 // find or create resolved member name
1299 static oop find_resolved_method(const methodHandle& m, TRAPS);
1300
1301 static bool is_instance(oop resolved_method);
1302 };
1303
1304
1305 #define MEMBERNAME_INJECTED_FIELDS(macro) \
1306 macro(java_lang_invoke_MemberName, vmindex, intptr_signature, false)
1307
1308
1309 class java_lang_invoke_MemberName: AllStatic {
1310 friend class JavaClasses;
1311
1312 private:
1313 // From java.lang.invoke.MemberName:
1314 // private Class<?> clazz; // class in which the method is defined
1315 // private String name; // may be null if not yet materialized
1316 // private Object type; // may be null if not yet materialized
1317 // private int flags; // modifier bits; see reflect.Modifier
1318 // private ResolvedMethodName method; // holds VM-specific target value
1319 // private intptr_t vmindex; // member index within class or interface
1320 static int _clazz_offset;
1321 static int _name_offset;
1322 static int _type_offset;
1323 static int _flags_offset;
1324 static int _method_offset;
1325 static int _vmindex_offset;
1326
1327 static void compute_offsets();
1328
1329 public:
1330 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1331 // Accessors
1332 static oop clazz(oop mname);
1333 static void set_clazz(oop mname, oop clazz);
1334
1335 static oop type(oop mname);
1336 static void set_type(oop mname, oop type);
1337
1338 static oop name(oop mname);
1339 static void set_name(oop mname, oop name);
1340
1341 static int flags(oop mname);
1342 static void set_flags(oop mname, int flags);
1343
1344 // Link through ResolvedMethodName field to get Method*
1345 static Method* vmtarget(oop mname);
1346 static void set_method(oop mname, oop method);
1347
1348 static intptr_t vmindex(oop mname);
1349 static void set_vmindex(oop mname, intptr_t index);
1350
1351 // Testers
1352 static bool is_subclass(Klass* klass) {
1353 return klass->is_subclass_of(vmClasses::MemberName_klass());
1354 }
1355 static bool is_instance(oop obj);
1356
1357 static bool is_method(oop obj);
1358
1359 // Relevant integer codes (keep these in synch. with MethodHandleNatives.Constants):
1360 enum {
1361 MN_IS_METHOD = 0x00010000, // method (not constructor)
1362 MN_IS_CONSTRUCTOR = 0x00020000, // constructor
1363 MN_IS_FIELD = 0x00040000, // field
1364 MN_IS_TYPE = 0x00080000, // nested type
1365 MN_CALLER_SENSITIVE = 0x00100000, // @CallerSensitive annotation detected
1366 MN_TRUSTED_FINAL = 0x00200000, // trusted final field
1367 MN_HIDDEN_MEMBER = 0x00400000, // @Hidden annotation detected
1368 MN_REFERENCE_KIND_SHIFT = 24, // refKind
1369 MN_REFERENCE_KIND_MASK = 0x0F000000 >> MN_REFERENCE_KIND_SHIFT,
1370 MN_NESTMATE_CLASS = 0x00000001,
1371 MN_HIDDEN_CLASS = 0x00000002,
1372 MN_STRONG_LOADER_LINK = 0x00000004,
1373 MN_ACCESS_VM_ANNOTATIONS = 0x00000008,
1374 // Lookup modes
1375 MN_MODULE_MODE = 0x00000010,
1376 MN_UNCONDITIONAL_MODE = 0x00000020,
1377 MN_TRUSTED_MODE = -1
1378 };
1379
1380 // Accessors for code generation:
1381 static int clazz_offset() { CHECK_INIT(_clazz_offset); }
1382 static int type_offset() { CHECK_INIT(_type_offset); }
1383 static int flags_offset() { CHECK_INIT(_flags_offset); }
1384 static int method_offset() { CHECK_INIT(_method_offset); }
1385 static int vmindex_offset() { CHECK_INIT(_vmindex_offset); }
1386 };
1387
1388
1389 // Interface to java.lang.invoke.MethodType objects
1390
1391 class java_lang_invoke_MethodType: AllStatic {
1392 friend class JavaClasses;
1393
1394 private:
1395 static int _rtype_offset;
1396 static int _ptypes_offset;
1397
1398 static void compute_offsets();
1399
1400 public:
1401 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1402 // Accessors
1403 static oop rtype(oop mt);
1404 static objArrayOop ptypes(oop mt);
1405
1406 static oop ptype(oop mt, int index);
1407 static int ptype_count(oop mt);
1408
1409 static int ptype_slot_count(oop mt); // extra counts for long/double
1410 static int rtype_slot_count(oop mt); // extra counts for long/double
1411
1412 static Symbol* as_signature(oop mt, bool intern_if_not_found);
1413 static void print_signature(oop mt, outputStream* st);
1414
1415 static bool is_instance(oop obj);
1416
1417 static bool equals(oop mt1, oop mt2);
1418
1419 // Accessors for code generation:
1420 static int rtype_offset() { CHECK_INIT(_rtype_offset); }
1421 static int ptypes_offset() { CHECK_INIT(_ptypes_offset); }
1422 };
1423
1424
1425 // Interface to java.lang.invoke.CallSite objects
1426 #define CALLSITE_INJECTED_FIELDS(macro) \
1427 macro(java_lang_invoke_CallSite, vmdependencies, intptr_signature, false) \
1428 macro(java_lang_invoke_CallSite, last_cleanup, long_signature, false)
1429
1430 class java_lang_invoke_CallSite: AllStatic {
1431 friend class JavaClasses;
1432
1433 private:
1434 static int _target_offset;
1435 static int _vmdependencies_offset;
1436 static int _last_cleanup_offset;
1437
1438 static void compute_offsets();
1439
1440 public:
1441 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1442 // Accessors
1443 static oop target( oop site);
1444 static void set_target( oop site, oop target);
1445 static void set_target_volatile( oop site, oop target);
1446
1447 static DependencyContext vmdependencies(oop call_site);
1448
1449 // Testers
1450 static bool is_subclass(Klass* klass) {
1451 return klass->is_subclass_of(vmClasses::CallSite_klass());
1452 }
1453 static bool is_instance(oop obj);
1454
1455 // Accessors for code generation:
1456 static int target_offset() { CHECK_INIT(_target_offset); }
1457 };
1458
1459 // Interface to java.lang.invoke.ConstantCallSite objects
1460
1461 class java_lang_invoke_ConstantCallSite: AllStatic {
1462 friend class JavaClasses;
1463
1464 private:
1465 static int _is_frozen_offset;
1466
1467 static void compute_offsets();
1468
1469 public:
1470 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1471 // Accessors
1472 static jboolean is_frozen(oop site);
1473
1474 // Testers
1475 static bool is_subclass(Klass* klass) {
1476 return klass->is_subclass_of(vmClasses::ConstantCallSite_klass());
1477 }
1478 static bool is_instance(oop obj);
1479 };
1480
1481 // Interface to java.lang.ClassLoader objects
1482
1483 #define CLASSLOADER_INJECTED_FIELDS(macro) \
1484 macro(java_lang_ClassLoader, loader_data, intptr_signature, false)
1485
1486 class java_lang_ClassLoader : AllStatic {
1487 private:
1488 static int _loader_data_offset;
1489 static int _parent_offset;
1490 static int _parallelCapable_offset;
1491 static int _name_offset;
1492 static int _nameAndId_offset;
1493 static int _unnamedModule_offset;
1494
1495 static void compute_offsets();
1496
1497 public:
1498 // Support for CDS
1499 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1500 static int loader_data_offset() { return _loader_data_offset; }
1501
1502 static ClassLoaderData* loader_data_acquire(oop loader);
1503 static ClassLoaderData* loader_data(oop loader);
1504 static void release_set_loader_data(oop loader, ClassLoaderData* new_data);
1505
1506 static oop parent(oop loader);
1507 static oop parent_no_keepalive(oop loader);
1508 static oop name(oop loader);
1509 static oop nameAndId(oop loader);
1510 static bool isAncestor(oop loader, oop cl);
1511
1512 // Support for parallelCapable field
1513 static bool parallelCapable(oop the_class_mirror);
1514
1515 static bool is_trusted_loader(oop loader);
1516
1517 // Testers
1518 static bool is_subclass(Klass* klass) {
1519 return klass->is_subclass_of(vmClasses::ClassLoader_klass());
1520 }
1521 static bool is_instance(oop obj);
1522
1523 static oop unnamedModule(oop loader);
1524
1525 // Debugging
1526 friend class JavaClasses;
1527 };
1528
1529
1530 // Interface to java.lang.System objects
1531
1532 class java_lang_System : AllStatic {
1533 private:
1534 static int _static_in_offset;
1535 static int _static_out_offset;
1536 static int _static_err_offset;
1537
1538 public:
1539 static int in_offset() { CHECK_INIT(_static_in_offset); }
1540 static int out_offset() { CHECK_INIT(_static_out_offset); }
1541 static int err_offset() { CHECK_INIT(_static_err_offset); }
1542
1543 static void compute_offsets();
1544 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1545
1546 // Debugging
1547 friend class JavaClasses;
1548 };
1549
1550
1551 // Interface to java.lang.StackTraceElement objects
1552
1553 class java_lang_StackTraceElement: AllStatic {
1554 private:
1555 static int _declaringClassObject_offset;
1556 static int _classLoaderName_offset;
1557 static int _moduleName_offset;
1558 static int _moduleVersion_offset;
1559 static int _declaringClass_offset;
1560 static int _methodName_offset;
1561 static int _fileName_offset;
1562 static int _lineNumber_offset;
1563
1564 // Setters
1565 static void set_classLoaderName(oop element, oop value);
1566 static void set_moduleName(oop element, oop value);
1567 static void set_moduleVersion(oop element, oop value);
1568 static void set_declaringClass(oop element, oop value);
1569 static void set_methodName(oop element, oop value);
1570 static void set_fileName(oop element, oop value);
1571 static void set_lineNumber(oop element, int value);
1572 static void set_declaringClassObject(oop element, oop value);
1573
1574 static void decode_file_and_line(Handle java_mirror, InstanceKlass* holder, int version,
1575 const methodHandle& method, int bci,
1576 Symbol*& source, oop& source_file, int& line_number, TRAPS);
1577
1578 public:
1579 // Create an instance of StackTraceElement
1580 static oop create(const methodHandle& method, int bci, TRAPS);
1581
1582 static void fill_in(Handle element, InstanceKlass* holder, const methodHandle& method,
1583 int version, int bci, Symbol* name, TRAPS);
1584
1585 static void compute_offsets();
1586 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1587
1588 #if INCLUDE_JVMCI
1589 static void decode(const methodHandle& method, int bci, Symbol*& fileName, int& lineNumber, TRAPS);
1590 #endif
1591
1592 // Debugging
1593 friend class JavaClasses;
1594 };
1595
1596
1597 class Backtrace: AllStatic {
1598 public:
1599 // Helper backtrace functions to store bci|version together.
1600 static int merge_bci_and_version(int bci, int version);
1601 static int merge_mid_and_cpref(int mid, int cpref);
1602 static int bci_at(unsigned int merged);
1603 static int version_at(unsigned int merged);
1604 static int mid_at(unsigned int merged);
1605 static int cpref_at(unsigned int merged);
1606 static int get_line_number(Method* method, int bci);
1607 static Symbol* get_source_file_name(InstanceKlass* holder, int version);
1608
1609 // Debugging
1610 friend class JavaClasses;
1611 };
1612
1613 class java_lang_ClassFrameInfo: AllStatic {
1614 private:
1615 static int _classOrMemberName_offset;
1616 static int _flags_offset;
1617
1618 public:
1619 static oop classOrMemberName(oop info);
1620 static int flags(oop info);
1621
1622 // Setters
1623 static void init_class(Handle stackFrame, const methodHandle& m);
1624 static void init_method(Handle stackFrame, const methodHandle& m, TRAPS);
1625
1626 static void compute_offsets();
1627 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1628
1629 // Debugging
1630 friend class JavaClasses;
1631 };
1632
1633 // Interface to java.lang.StackFrameInfo objects
1634
1635 #define STACKFRAMEINFO_INJECTED_FIELDS(macro) \
1636 macro(java_lang_StackFrameInfo, version, short_signature, false)
1637
1638 class java_lang_StackFrameInfo: AllStatic {
1639 private:
1640 static int _type_offset;
1641 static int _name_offset;
1642 static int _bci_offset;
1643 static int _version_offset;
1644 static int _contScope_offset;
1645
1646 public:
1647 // Getters
1648 static oop name(oop info);
1649 static oop type(oop info);
1650 static Method* get_method(oop info);
1651
1652 // Setters
1653 static void set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, oop cont, TRAPS);
1654 static void set_name(oop info, oop value);
1655 static void set_type(oop info, oop value);
1656 static void set_bci(oop info, int value);
1657
1658 static void set_version(oop info, short value);
1659 static void set_contScope(oop info, oop value);
1660
1661 static void compute_offsets();
1662 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1663
1664 static void to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS);
1665
1666 // Debugging
1667 friend class JavaClasses;
1668 };
1669
1670 class java_lang_LiveStackFrameInfo: AllStatic {
1671 private:
1672 static int _monitors_offset;
1673 static int _locals_offset;
1674 static int _operands_offset;
1675 static int _mode_offset;
1676
1677 public:
1678 static void set_monitors(oop info, oop value);
1679 static void set_locals(oop info, oop value);
1680 static void set_operands(oop info, oop value);
1681 static void set_mode(oop info, int value);
1682
1683 static void compute_offsets();
1684 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1685
1686 // Debugging
1687 friend class JavaClasses;
1688 };
1689
1690 // Interface to java.lang.reflect.RecordComponent objects
1691
1692 class java_lang_reflect_RecordComponent: AllStatic {
1693 private:
1694 static int _clazz_offset;
1695 static int _name_offset;
1696 static int _type_offset;
1697 static int _accessor_offset;
1698 static int _signature_offset;
1699 static int _annotations_offset;
1700 static int _typeAnnotations_offset;
1701
1702 // Setters
1703 static void set_clazz(oop element, oop value);
1704 static void set_name(oop element, oop value);
1705 static void set_type(oop element, oop value);
1706 static void set_accessor(oop element, oop value);
1707 static void set_signature(oop element, oop value);
1708 static void set_annotations(oop element, oop value);
1709 static void set_typeAnnotations(oop element, oop value);
1710
1711 public:
1712 // Create an instance of RecordComponent
1713 static oop create(InstanceKlass* holder, RecordComponent* component, TRAPS);
1714
1715 static void compute_offsets();
1716 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1717
1718 // Debugging
1719 friend class JavaClasses;
1720 };
1721
1722
1723 // Interface to java.lang.AssertionStatusDirectives objects
1724
1725 class java_lang_AssertionStatusDirectives: AllStatic {
1726 private:
1727 static int _classes_offset;
1728 static int _classEnabled_offset;
1729 static int _packages_offset;
1730 static int _packageEnabled_offset;
1731 static int _deflt_offset;
1732
1733 public:
1734 // Setters
1735 static void set_classes(oop obj, oop val);
1736 static void set_classEnabled(oop obj, oop val);
1737 static void set_packages(oop obj, oop val);
1738 static void set_packageEnabled(oop obj, oop val);
1739 static void set_deflt(oop obj, bool val);
1740
1741 static void compute_offsets();
1742 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1743
1744 // Debugging
1745 friend class JavaClasses;
1746 };
1747
1748
1749 class java_util_concurrent_locks_AbstractOwnableSynchronizer : AllStatic {
1750 private:
1751 static int _owner_offset;
1752 public:
1753 static void compute_offsets();
1754 static oop get_owner_threadObj(oop obj);
1755 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1756 };
1757
1758 // Interface to jdk.internal.misc.UnsafeConsants
1759
1760 class jdk_internal_misc_UnsafeConstants : AllStatic {
1761 public:
1762 static void set_unsafe_constants();
1763 static void compute_offsets() { }
1764 static void serialize_offsets(SerializeClosure* f) { }
1765 };
1766
1767 // Interface to jdk.internal.vm.vector.VectorSupport.VectorPayload objects
1768
1769 class vector_VectorPayload : AllStatic {
1770 private:
1771 static int _payload_offset;
1772 public:
1773 static void set_payload(oop o, oop val);
1774
1775 static void compute_offsets();
1776 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1777
1778 // Testers
1779 static bool is_subclass(Klass* klass) {
1780 return klass->is_subclass_of(vmClasses::vector_VectorPayload_klass());
1781 }
1782 static bool is_instance(oop obj);
1783 };
1784
1785 class java_lang_Integer : AllStatic {
1786 public:
1787 static jint value(oop obj);
1788 };
1789
1790 class java_lang_Long : AllStatic {
1791 public:
1792 static jlong value(oop obj);
1793 };
1794
1795 class java_lang_Character : AllStatic {
1796 public:
1797 static jchar value(oop obj);
1798 };
1799
1800 class java_lang_Short : AllStatic {
1801 public:
1802 static jshort value(oop obj);
1803 };
1804
1805 class java_lang_Byte : AllStatic {
1806 public:
1807 static jbyte value(oop obj);
1808 };
1809
1810 class java_lang_Boolean : AllStatic {
1811 private:
1812 static int _static_TRUE_offset;
1813 static int _static_FALSE_offset;
1814 public:
1815 static Symbol* symbol();
1816 static void compute_offsets(InstanceKlass* k);
1817 static oop get_TRUE(InstanceKlass *k);
1818 static oop get_FALSE(InstanceKlass *k);
1819 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1820 static jboolean value(oop obj);
1821 };
1822
1823 class java_lang_Integer_IntegerCache : AllStatic {
1824 private:
1825 static int _static_cache_offset;
1826 public:
1827 static Symbol* symbol();
1828 static void compute_offsets(InstanceKlass* k);
1829 static objArrayOop cache(InstanceKlass *k);
1830 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1831 };
1832
1833 class java_lang_Long_LongCache : AllStatic {
1834 private:
1835 static int _static_cache_offset;
1836 public:
1837 static Symbol* symbol();
1838 static void compute_offsets(InstanceKlass* k);
1839 static objArrayOop cache(InstanceKlass *k);
1840 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1841 };
1842
1843 class java_lang_Character_CharacterCache : AllStatic {
1844 private:
1845 static int _static_cache_offset;
1846 public:
1847 static Symbol* symbol();
1848 static void compute_offsets(InstanceKlass* k);
1849 static objArrayOop cache(InstanceKlass *k);
1850 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1851 };
1852
1853 class java_lang_Short_ShortCache : AllStatic {
1854 private:
1855 static int _static_cache_offset;
1856 public:
1857 static Symbol* symbol();
1858 static void compute_offsets(InstanceKlass* k);
1859 static objArrayOop cache(InstanceKlass *k);
1860 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1861 };
1862
1863 class java_lang_Byte_ByteCache : AllStatic {
1864 private:
1865 static int _static_cache_offset;
1866 public:
1867 static Symbol* symbol();
1868 static void compute_offsets(InstanceKlass* k);
1869 static objArrayOop cache(InstanceKlass *k);
1870 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1871 };
1872
1873
1874 // Interface to java.lang.InternalError objects
1875
1876 #define INTERNALERROR_INJECTED_FIELDS(macro) \
1877 macro(java_lang_InternalError, during_unsafe_access, bool_signature, false)
1878
1879 class java_lang_InternalError : AllStatic {
1880 private:
1881 static int _during_unsafe_access_offset;
1882 public:
1883 static jboolean during_unsafe_access(oop internal_error);
1884 static void set_during_unsafe_access(oop internal_error);
1885 static void compute_offsets();
1886 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1887 };
1888
1889 // Use to declare fields that need to be injected into Java classes
1890 // for the JVM to use. The name_index and signature_index are
1891 // declared in vmSymbols. The may_be_java flag is used to declare
1892 // fields that might already exist in Java but should be injected if
1893 // they don't. Otherwise the field is unconditionally injected and
1894 // the JVM uses the injected one. This is to ensure that name
1895 // collisions don't occur. In general may_be_java should be false
1896 // unless there's a good reason.
1897
1898 class InjectedField {
1899 public:
1900 const vmClassID klass_id;
1901 const vmSymbolID name_index;
1902 const vmSymbolID signature_index;
1903 const bool may_be_java;
1904
1905
1906 Klass* klass() const { return vmClasses::klass_at(klass_id); }
1907 Symbol* name() const { return lookup_symbol(name_index); }
1908 Symbol* signature() const { return lookup_symbol(signature_index); }
1909
1910 int compute_offset();
1911
1912 // Find the Symbol for this index
1913 static Symbol* lookup_symbol(vmSymbolID symbol_index) {
1914 return Symbol::vm_symbol_at(symbol_index);
1915 }
1916 };
1917
1918
1919 // Interface to hard-coded offset checking
1920
1921 enum class InjectedFieldID : int;
1922
1923 class JavaClasses : AllStatic {
1924 private:
1925
1926 static InjectedField _injected_fields[];
1927
1928 static bool check_offset(const char *klass_name, int offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1929 public:
1930
1931 static int compute_injected_offset(InjectedFieldID id);
1932
1933 static void compute_offsets();
1934 static void check_offsets() PRODUCT_RETURN;
1935 static void serialize_offsets(SerializeClosure* soc) NOT_CDS_RETURN;
1936 static InjectedField* get_injected(Symbol* class_name, int* field_count);
1937 static bool is_supported_for_archiving(oop obj) NOT_CDS_JAVA_HEAP_RETURN_(false);
1938
1939 static void compute_offset(int &dest_offset,
1940 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol,
1941 bool is_static = false);
1942 static void compute_offset(int& dest_offset, InstanceKlass* ik,
1943 const char* name_string, Symbol* signature_symbol,
1944 bool is_static = false);
1945 };
1946
1947 #undef CHECK_INIT
1948
1949 #endif // SHARE_CLASSFILE_JAVACLASSES_HPP