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