1 /*
2 * Copyright (c) 1997, 2025, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_CLASSFILE_JAVACLASSES_HPP
26 #define SHARE_CLASSFILE_JAVACLASSES_HPP
27
28 #include "classfile/vmClasses.hpp"
29 #include "oops/instanceKlass.hpp"
30 #include "oops/oopsHierarchy.hpp"
31 #include "oops/symbol.hpp"
32 #include "runtime/handles.hpp"
33 #include "runtime/os.hpp"
34 #include "utilities/macros.hpp"
35 #include "utilities/utf8.hpp"
36 #include "utilities/vmEnums.hpp"
37
38 class JvmtiThreadState;
39 class RecordComponent;
40 class SerializeClosure;
41 class ObjectWaiter;
42 class ObjectMonitor;
43
44 #define CHECK_INIT(offset) assert(offset != 0, "should be initialized"); return offset;
45
46 // Interface to java.lang.Object objects
47
48 class java_lang_Object : AllStatic {
49 public:
50 static void register_natives(TRAPS);
51 };
52
53 // Interface to java.lang.String objects
54
55 // The flags field is a collection of bits representing boolean values used
56 // internally by the VM.
57 #define STRING_INJECTED_FIELDS(macro) \
58 macro(java_lang_String, flags, byte_signature, false)
59
60 class java_lang_String : AllStatic {
61 private:
62 static int _value_offset;
63 static int _hash_offset;
64 static int _hashIsZero_offset;
65 static int _coder_offset;
66 static int _flags_offset;
67
68 static bool _initialized;
69
70 static Handle basic_create(int length, bool byte_arr, TRAPS);
71
72 static inline void set_coder(oop string, jbyte coder);
73
74 // Bitmasks for values in the injected flags field.
75 static const uint8_t _deduplication_forbidden_mask = 1 << 0;
76 static const uint8_t _deduplication_requested_mask = 1 << 1;
77
78 static int flags_offset() { CHECK_INIT(_flags_offset); }
79 // Return the address of the injected flags field.
80 static inline uint8_t* flags_addr(oop java_string);
81 // Test whether the designated bit of the injected flags field is set.
82 static inline bool is_flag_set(oop java_string, uint8_t flag_mask);
83 // Atomically test and set the designated bit of the injected flags field,
84 // returning true if the bit was already set.
85 static bool test_and_set_flag(oop java_string, uint8_t flag_mask);
86
87 static inline unsigned int hash_code_impl(oop java_string, bool update);
88
89 public:
90
91 // Coders
92 enum Coder {
93 CODER_LATIN1 = 0,
94 CODER_UTF16 = 1
95 };
96
97 static void compute_offsets();
98 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
99
100 // Instance creation
101 static Handle create_from_unicode(const jchar* unicode, int len, TRAPS);
102 static oop create_oop_from_unicode(const jchar* unicode, int len, TRAPS);
103 static Handle create_from_str(const char* utf8_str, TRAPS);
104 static oop create_oop_from_str(const char* utf8_str, TRAPS);
105 static Handle create_from_symbol(const Symbol* symbol, TRAPS);
106 static Handle create_from_platform_dependent_str(const char* str, TRAPS);
107
108 static void set_compact_strings(bool value);
109
110 static int value_offset() { CHECK_INIT(_value_offset); }
111 static int coder_offset() { CHECK_INIT(_coder_offset); }
112
113 static inline void set_value(oop string, typeArrayOop buffer);
114
115 // Set the deduplication_forbidden flag true. This flag is sticky; once
116 // set it never gets cleared. This is set when a String is interned in
117 // the StringTable, to prevent string deduplication from changing the
118 // String's value array.
119 static inline void set_deduplication_forbidden(oop java_string);
120
121 // Test and set the deduplication_requested flag. Returns the old value
122 // of the flag. This flag is sticky; once set it never gets cleared.
123 // Some GCs may use this flag when deciding whether to request
124 // deduplication of a String, to avoid multiple requests for the same
125 // object.
126 static inline bool test_and_set_deduplication_requested(oop java_string);
127
128 // Accessors
129 static inline typeArrayOop value(oop java_string);
130 static inline typeArrayOop value_no_keepalive(oop java_string);
131 static inline bool hash_is_set(oop string);
132 static inline bool is_latin1(oop java_string);
133 static inline bool deduplication_forbidden(oop java_string);
134 static inline bool deduplication_requested(oop java_string);
135 static inline int length(oop java_string);
136 static inline int length(oop java_string, typeArrayOop string_value);
137 static size_t utf8_length(oop java_string);
138 static size_t utf8_length(oop java_string, typeArrayOop string_value);
139 // Legacy variants that truncate the length if needed
140 static int utf8_length_as_int(oop java_string);
141 static int utf8_length_as_int(oop java_string, typeArrayOop string_value);
142
143 // String converters
144 static char* as_utf8_string(oop java_string);
145 // `length` is set to the length of the utf8 sequence.
146 static char* as_utf8_string(oop java_string, size_t& length);
147 static char* as_utf8_string_full(oop java_string, char* buf, size_t buflen, size_t& length);
148 static char* as_utf8_string(oop java_string, char* buf, size_t buflen);
149 static char* as_utf8_string(oop java_string, int start, int len);
150 static char* as_utf8_string(oop java_string, typeArrayOop value, char* buf, size_t buflen);
151 static char* as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, size_t buflen);
152 static char* as_platform_dependent_str(Handle java_string, TRAPS);
153 static jchar* as_unicode_string(oop java_string, int& length, TRAPS);
154 static jchar* as_unicode_string_or_null(oop java_string, int& length);
155 // produce an ascii string with all other values quoted using \u####
156 static char* as_quoted_ascii(oop java_string);
157
158 // Compute the hash value for a java.lang.String object which would
159 // contain the characters passed in.
160 //
161 // As the hash value used by the String object itself, in
162 // String.hashCode(). This value is normally calculated in Java code
163 // in the String.hashCode method(), but is precomputed for String
164 // objects in the shared archive file.
165 // hash P(31) from Kernighan & Ritchie
166 //
167 // For this reason, THIS ALGORITHM MUST MATCH String.hashCode().
168 static unsigned int hash_code(const jchar* s, int len) {
169 unsigned int h = 0;
170 while (len-- > 0) {
171 h = 31*h + (unsigned int) *s;
172 s++;
173 }
174 return h;
175 }
176
177 static unsigned int hash_code(const jbyte* s, int len) {
178 unsigned int h = 0;
179 while (len-- > 0) {
180 h = 31*h + (((unsigned int) *s) & 0xFF);
181 s++;
182 }
183 return h;
184 }
185
186 static unsigned int hash_code(const char* utf8_str, size_t utf8_len) {
187 unsigned int h = 0;
188 int unicode_length = UTF8::unicode_length(utf8_str, utf8_len);
189
190 jchar c;
191 while (unicode_length-- > 0) {
192 utf8_str = UTF8::next(utf8_str, &c);
193 h = 31 * h + ((unsigned int)c);
194 }
195 return h;
196 }
197
198 static unsigned int hash_code(oop java_string);
199 static unsigned int hash_code_noupdate(oop java_string);
200
201 // Compare strings (of different types/encodings), length is the string (array) length
202 static bool equals(oop java_string, const jchar* chars, int len);
203 static bool equals(oop java_string, const char* utf8_str, size_t utf8_len);
204 static bool equals(oop str1, oop str2);
205 static inline bool value_equals(typeArrayOop str_value1, typeArrayOop str_value2);
206
207 // Conversion between '.' and '/' formats, and allocate a String from the result.
208 static Handle externalize_classname(Symbol* java_name, TRAPS);
209
210 // Conversion
211 static Symbol* as_symbol(oop java_string);
212 static Symbol* as_symbol_or_null(oop java_string);
213
214 // Tester
215 static inline bool is_instance(oop obj);
216
217 // Debugging
218 static void print(oop java_string, outputStream* st, int max_length = MaxStringPrintSize);
219 friend class JavaClasses;
220 friend class StringTable;
221 };
222
223
224 // Interface to java.lang.Class objects
225
226 #define CLASS_INJECTED_FIELDS(macro) \
227 macro(java_lang_Class, klass, intptr_signature, false) \
228 macro(java_lang_Class, array_klass, intptr_signature, false) \
229 macro(java_lang_Class, oop_size, int_signature, false) \
230 macro(java_lang_Class, static_oop_field_count, int_signature, false) \
231 macro(java_lang_Class, source_file, object_signature, false) \
232 macro(java_lang_Class, init_lock, object_signature, false)
233
234 class java_lang_Class : AllStatic {
235 friend class VMStructs;
236 friend class JVMCIVMStructs;
237
238 private:
239
240 // The fake offsets are added by the class loader when java.lang.Class is loaded
241
242 static int _klass_offset;
243 static int _array_klass_offset;
244
245 static int _oop_size_offset;
246 static int _static_oop_field_count_offset;
247
248 static int _protection_domain_offset;
249 static int _init_lock_offset;
250 static int _signers_offset;
251 static int _class_loader_offset;
252 static int _module_offset;
253 static int _component_mirror_offset;
254 static int _name_offset;
255 static int _source_file_offset;
256 static int _classData_offset;
257 static int _classRedefinedCount_offset;
258 static int _reflectionData_offset;
259 static int _modifiers_offset;
260 static int _is_primitive_offset;
261 static int _raw_access_flags_offset;
262
263 static bool _offsets_computed;
264
265 static GrowableArray<Klass*>* _fixup_mirror_list;
266 static GrowableArray<Klass*>* _fixup_module_field_list;
267
268 static void set_init_lock(oop java_class, oop init_lock);
269 static void set_protection_domain(oop java_class, oop protection_domain);
270 static void set_class_loader(oop java_class, oop class_loader);
271 static void set_component_mirror(oop java_class, oop comp_mirror);
272 static void initialize_mirror_fields(Klass* k, Handle mirror, Handle protection_domain,
273 Handle classData, TRAPS);
274 static void set_mirror_module_field(JavaThread* current, Klass* K, Handle mirror, Handle module);
275 public:
276 static void allocate_fixup_lists();
277 static void compute_offsets();
278
279 // Instance creation
280 static void allocate_mirror(Klass* k, bool is_scratch, Handle protection_domain, Handle classData,
281 Handle& mirror, Handle& comp_mirror, TRAPS); // returns mirror and comp_mirror
282 static void create_mirror(Klass* k, Handle class_loader, Handle module,
283 Handle protection_domain, Handle classData, TRAPS);
284 static void fixup_mirror(Klass* k, TRAPS);
285 static oop create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS);
286
287 // Archiving
288 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
289 static void create_scratch_mirror(Klass* k, TRAPS) NOT_CDS_JAVA_HEAP_RETURN;
290 static bool restore_archived_mirror(Klass *k, Handle class_loader, Handle module,
291 Handle protection_domain,
292 TRAPS) NOT_CDS_JAVA_HEAP_RETURN_(false);
293
294 static void fixup_module_field(Klass* k, Handle module);
295
296 // Conversion
297 static Klass* as_Klass(oop java_class);
298 static void set_klass(oop java_class, Klass* klass);
299 static BasicType as_BasicType(oop java_class, Klass** reference_klass = nullptr);
300 static Symbol* as_signature(oop java_class, bool intern_if_not_found);
301 static void print_signature(oop java_class, outputStream *st);
302 static const char* as_external_name(oop java_class);
303 // Testing
304 static bool is_instance(oop obj);
305
306 static bool is_primitive(oop java_class);
307 static void set_is_primitive(oop java_class);
308 static BasicType primitive_type(oop java_class);
309 static oop primitive_mirror(BasicType t);
310 // JVM_NewArray support
311 static Klass* array_klass_acquire(oop java_class);
312 static void release_set_array_klass(oop java_class, Klass* klass);
313 // compiler support for class operations
314 static int klass_offset() { CHECK_INIT(_klass_offset); }
315 static int array_klass_offset() { CHECK_INIT(_array_klass_offset); }
316 // Support for classRedefinedCount field
317 static int classRedefinedCount(oop the_class_mirror);
318 static void set_classRedefinedCount(oop the_class_mirror, int value);
319
320 // Support for embedded per-class oops
321 static oop protection_domain(oop java_class);
322 static oop init_lock(oop java_class);
323 static void clear_init_lock(oop java_class) {
324 set_init_lock(java_class, nullptr);
325 }
326 static oop component_mirror(oop java_class);
327 static int component_mirror_offset() { return _component_mirror_offset; }
328 static objArrayOop signers(oop java_class);
329 static oop class_data(oop java_class);
330 static void set_class_data(oop java_class, oop classData);
331 static void set_reflection_data(oop java_class, oop reflection_data);
332 static int reflection_data_offset() { return _reflectionData_offset; }
333
334 static oop class_loader(oop java_class);
335 static void set_module(oop java_class, oop module);
336 static oop module(oop java_class);
337
338 static oop name(Handle java_class, TRAPS);
339
340 static oop source_file(oop java_class);
341 static void set_source_file(oop java_class, oop source_file);
342
343 static int modifiers(oop java_class);
344 static void set_modifiers(oop java_class, u2 value);
345
346 static int raw_access_flags(oop java_class);
347 static void set_raw_access_flags(oop java_class, u2 value);
348
349 static size_t oop_size(oop java_class);
350 static void set_oop_size(HeapWord* java_class, size_t size);
351 static int static_oop_field_count(oop java_class);
352 static void set_static_oop_field_count(oop java_class, int size);
353
354 static GrowableArray<Klass*>* fixup_mirror_list() {
355 return _fixup_mirror_list;
356 }
357 static void set_fixup_mirror_list(GrowableArray<Klass*>* v) {
358 _fixup_mirror_list = v;
359 }
360
361 static GrowableArray<Klass*>* fixup_module_field_list() {
362 return _fixup_module_field_list;
363 }
364 static void set_fixup_module_field_list(GrowableArray<Klass*>* v) {
365 _fixup_module_field_list = v;
366 }
367
368 // Debugging
369 friend class JavaClasses;
370 };
371
372 // Interface to java.lang.Thread objects
373
374 #define THREAD_INJECTED_FIELDS(macro) \
375 macro(java_lang_Thread, jvmti_thread_state, intptr_signature, false) \
376 macro(java_lang_Thread, jvmti_VTMS_transition_disable_count, int_signature, false) \
377 macro(java_lang_Thread, jvmti_is_in_VTMS_transition, bool_signature, false) \
378 JFR_ONLY(macro(java_lang_Thread, jfr_epoch, short_signature, false))
379
380 class java_lang_Thread : AllStatic {
381 friend class java_lang_VirtualThread;
382 friend class JVMCIVMStructs;
383 private:
384 // Note that for this class the layout changed between JDK1.2 and JDK1.3,
385 // so we compute the offsets at startup rather than hard-wiring them.
386 static int _holder_offset;
387 static int _name_offset;
388 static int _contextClassLoader_offset;
389 static int _eetop_offset;
390 static int _jvmti_thread_state_offset;
391 static int _jvmti_VTMS_transition_disable_count_offset;
392 static int _jvmti_is_in_VTMS_transition_offset;
393 static int _interrupted_offset;
394 static int _interruptLock_offset;
395 static int _tid_offset;
396 static int _continuation_offset;
397 static int _park_blocker_offset;
398 static int _scopedValueBindings_offset;
399 JFR_ONLY(static int _jfr_epoch_offset;)
400
401 static void compute_offsets();
402
403 public:
404 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
405
406 // Returns the JavaThread associated with the thread obj
407 static JavaThread* thread(oop java_thread);
408 static JavaThread* thread_acquire(oop java_thread);
409 // Set JavaThread for instance
410 static void set_thread(oop java_thread, JavaThread* thread);
411 static void release_set_thread(oop java_thread, JavaThread* thread);
412 // FieldHolder
413 static oop holder(oop java_thread);
414 // interruptLock
415 static oop interrupt_lock(oop java_thread);
416 // Interrupted status
417 static bool interrupted(oop java_thread);
418 static void set_interrupted(oop java_thread, bool val);
419 // Name
420 static oop name(oop java_thread);
421 static void set_name(oop java_thread, oop name);
422 // Priority
423 static ThreadPriority priority(oop java_thread);
424 static void set_priority(oop java_thread, ThreadPriority priority);
425 // Thread group
426 static oop threadGroup(oop java_thread);
427 // Alive (NOTE: this is not really a field, but provides the correct
428 // definition without doing a Java call)
429 static bool is_alive(oop java_thread);
430 // Daemon
431 static bool is_daemon(oop java_thread);
432 static void set_daemon(oop java_thread);
433 // Context ClassLoader
434 static oop context_class_loader(oop java_thread);
435 // Stack size hint
436 static jlong stackSize(oop java_thread);
437 // Thread ID
438 static int64_t thread_id(oop java_thread);
439 static ByteSize thread_id_offset();
440 // Continuation
441 static inline oop continuation(oop java_thread);
442
443 static JvmtiThreadState* jvmti_thread_state(oop java_thread);
444 static void set_jvmti_thread_state(oop java_thread, JvmtiThreadState* state);
445 static int VTMS_transition_disable_count(oop java_thread);
446 static void inc_VTMS_transition_disable_count(oop java_thread);
447 static void dec_VTMS_transition_disable_count(oop java_thread);
448 static bool is_in_VTMS_transition(oop java_thread);
449 static void set_is_in_VTMS_transition(oop java_thread, bool val);
450 static int is_in_VTMS_transition_offset();
451
452 // Clear all scoped value bindings on error
453 static void clear_scopedValueBindings(oop java_thread);
454
455 // Blocker object responsible for thread parking
456 static oop park_blocker(oop java_thread);
457
458 // Write thread status info to threadStatus field of java.lang.Thread.
459 static void set_thread_status(oop java_thread_oop, JavaThreadStatus status);
460 // Read thread status info from threadStatus field of java.lang.Thread.
461 static JavaThreadStatus get_thread_status(oop java_thread_oop);
462
463 static const char* thread_status_name(oop java_thread_oop);
464
465 // Fill in current stack trace, can cause GC
466 // If locks != nullptr, fill lock info
467 static oop async_get_stack_trace(oop java_thread, TRAPS);
468 static oop get_thread_snapshot(jobject jthread, TRAPS);
469
470 JFR_ONLY(static u2 jfr_epoch(oop java_thread);)
471 JFR_ONLY(static void set_jfr_epoch(oop java_thread, u2 epoch);)
472 JFR_ONLY(static int jfr_epoch_offset() { CHECK_INIT(_jfr_epoch_offset); })
473
474 // Debugging
475 friend class JavaClasses;
476 };
477
478 // Interface to java.lang.Thread$FieldHolder objects
479
480 class java_lang_Thread_FieldHolder : AllStatic {
481 private:
482 static int _group_offset;
483 static int _priority_offset;
484 static int _stackSize_offset;
485 static int _daemon_offset;
486 static int _thread_status_offset;
487
488 static void compute_offsets();
489
490 public:
491 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
492
493 static oop threadGroup(oop holder);
494
495 static ThreadPriority priority(oop holder);
496 static void set_priority(oop holder, ThreadPriority priority);
497
498 static jlong stackSize(oop holder);
499
500 static bool is_daemon(oop holder);
501 static void set_daemon(oop holder, bool val);
502
503 static void set_thread_status(oop holder, JavaThreadStatus status);
504 static JavaThreadStatus get_thread_status(oop holder);
505
506 friend class JavaClasses;
507 };
508
509 // Interface to java.lang.Thread$Constants objects
510
511 class java_lang_Thread_Constants : AllStatic {
512 private:
513 static int _static_VTHREAD_GROUP_offset;
514 static int _static_NOT_SUPPORTED_CLASSLOADER_offset;
515
516 static void compute_offsets();
517 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
518
519 public:
520 static oop get_VTHREAD_GROUP();
521
522 friend class JavaClasses;
523 };
524
525 // Interface to java.lang.ThreadGroup objects
526
527 class java_lang_ThreadGroup : AllStatic {
528 private:
529 static int _parent_offset;
530 static int _name_offset;
531 static int _maxPriority_offset;
532 static int _daemon_offset;
533
534 static void compute_offsets();
535 public:
536 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
537
538 // parent ThreadGroup
539 static oop parent(oop java_thread_group);
540 // name
541 static const char* name(oop java_thread_group);
542 // maxPriority in group
543 static ThreadPriority maxPriority(oop java_thread_group);
544 // Daemon
545 static bool is_daemon(oop java_thread_group);
546
547 // Debugging
548 friend class JavaClasses;
549 };
550
551
552 // Interface to java.lang.VirtualThread objects
553 #define VTHREAD_INJECTED_FIELDS(macro) \
554 macro(java_lang_VirtualThread, objectWaiter, intptr_signature, false) \
555
556 class java_lang_VirtualThread : AllStatic {
557 private:
558 static int static_vthread_scope_offset;
559 static int _carrierThread_offset;
560 static int _continuation_offset;
561 static int _state_offset;
562 static int _next_offset;
563 static int _onWaitingList_offset;
564 static int _notified_offset;
565 static int _interruptible_wait_offset;
566 static int _recheckInterval_offset;
567 static int _timeout_offset;
568 static int _objectWaiter_offset;
569 JFR_ONLY(static int _jfr_epoch_offset;)
570 public:
571 enum {
572 NEW = 0,
573 STARTED = 1,
574 RUNNING = 2,
575 PARKING = 3,
576 PARKED = 4,
577 PINNED = 5,
578 TIMED_PARKING = 6,
579 TIMED_PARKED = 7,
580 TIMED_PINNED = 8,
581 UNPARKED = 9,
582 YIELDING = 10,
583 YIELDED = 11,
584 BLOCKING = 12,
585 BLOCKED = 13,
586 UNBLOCKED = 14,
587 WAITING = 15,
588 WAIT = 16, // waiting in Object.wait
589 TIMED_WAITING = 17,
590 TIMED_WAIT = 18, // waiting in timed-Object.wait
591 TERMINATED = 99,
592
593 // additional state bits
594 SUSPENDED = 1 << 8, // suspended when unmounted
595 };
596
597 static void compute_offsets();
598 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
599
600 // Testers
601 static bool is_subclass(Klass* klass) {
602 return klass->is_subclass_of(vmClasses::VirtualThread_klass());
603 }
604 static bool is_instance(oop obj);
605
606 static oop vthread_scope();
607 static oop carrier_thread(oop vthread);
608 static oop continuation(oop vthread);
609 static int state(oop vthread);
610 static void set_state(oop vthread, int state);
611 static int cmpxchg_state(oop vthread, int old_state, int new_state);
612 static oop next(oop vthread);
613 static void set_next(oop vthread, oop next_vthread);
614 static bool set_onWaitingList(oop vthread, OopHandle& list_head);
615 static jlong timeout(oop vthread);
616 static void set_timeout(oop vthread, jlong value);
617 static void set_notified(oop vthread, jboolean value);
618 static void set_interruptible_wait(oop vthread, jboolean value);
619 static bool is_preempted(oop vthread);
620 static JavaThreadStatus map_state_to_thread_status(int state);
621
622 static inline ObjectWaiter* objectWaiter(oop vthread);
623 static inline void set_objectWaiter(oop vthread, ObjectWaiter* waiter);
624 static ObjectMonitor* current_pending_monitor(oop vthread);
625 static ObjectMonitor* current_waiting_monitor(oop vthread);
626 };
627
628
629 // Interface to java.lang.Throwable objects
630
631 class java_lang_Throwable: AllStatic {
632 friend class BacktraceBuilder;
633 friend class BacktraceIterator;
634
635 private:
636 // Trace constants
637 enum {
638 trace_methods_offset = 0,
639 trace_bcis_offset = 1,
640 trace_mirrors_offset = 2,
641 trace_names_offset = 3,
642 trace_conts_offset = 4,
643 trace_next_offset = 5,
644 trace_hidden_offset = 6,
645 trace_size = 7,
646 trace_chunk_size = 32
647 };
648
649 static int _backtrace_offset;
650 static int _detailMessage_offset;
651 static int _stackTrace_offset;
652 static int _depth_offset;
653 static int _cause_offset;
654 static int _static_unassigned_stacktrace_offset;
655
656 // StackTrace (programmatic access, new since 1.4)
657 static void clear_stacktrace(oop throwable);
658 // Stacktrace (post JDK 1.7.0 to allow immutability protocol to be followed)
659 static void set_stacktrace(oop throwable, oop st_element_array);
660 static oop unassigned_stacktrace();
661
662 public:
663 // Backtrace
664 static oop backtrace(oop throwable);
665 static void set_backtrace(oop throwable, oop value);
666 static int depth(oop throwable);
667 static void set_depth(oop throwable, int value);
668 // Message
669 static int get_detailMessage_offset() { CHECK_INIT(_detailMessage_offset); }
670 static oop message(oop throwable);
671 static const char* message_as_utf8(oop throwable);
672 static void set_message(oop throwable, oop value);
673
674 static oop cause(oop throwable);
675
676 static void print_stack_element(outputStream *st, Method* method, int bci);
677
678 static void compute_offsets();
679 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
680
681 // Allocate space for backtrace (created but stack trace not filled in)
682 static void allocate_backtrace(Handle throwable, TRAPS);
683 // Fill in current stack trace for throwable with preallocated backtrace (no GC)
684 static void fill_in_stack_trace_of_preallocated_backtrace(Handle throwable);
685 // Fill in current stack trace, can cause GC
686 static void fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS);
687 static void fill_in_stack_trace(Handle throwable, const methodHandle& method = methodHandle());
688
689 // Programmatic access to stack trace
690 static void get_stack_trace_elements(int depth, Handle backtrace, objArrayHandle stack_trace, TRAPS);
691
692 // For recreating class initialization error exceptions.
693 static Handle create_initialization_error(JavaThread* current, Handle throwable);
694
695 // Printing
696 static void print(oop throwable, outputStream* st);
697 static void print_stack_trace(Handle throwable, outputStream* st);
698 static void java_printStackTrace(Handle throwable, TRAPS);
699 // Debugging
700 friend class JavaClasses;
701 // Gets the method and bci of the top frame (TOS). Returns false if this failed.
702 static bool get_top_method_and_bci(oop throwable, Method** method, int* bci);
703 };
704
705
706 // Interface to java.lang.reflect.AccessibleObject objects
707
708 class java_lang_reflect_AccessibleObject: AllStatic {
709 private:
710 // Note that to reduce dependencies on the JDK we compute these
711 // offsets at run-time.
712 static int _override_offset;
713
714 static void compute_offsets();
715
716 public:
717 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
718
719 // Accessors
720 static jboolean override(oop reflect);
721 static void set_override(oop reflect, jboolean value);
722
723 // Debugging
724 friend class JavaClasses;
725 };
726
727
728 // Interface to java.lang.reflect.Method objects
729
730 class java_lang_reflect_Method : public java_lang_reflect_AccessibleObject {
731 private:
732 // Note that to reduce dependencies on the JDK we compute these
733 // offsets at run-time.
734 static int _clazz_offset;
735 static int _name_offset;
736 static int _returnType_offset;
737 static int _parameterTypes_offset;
738 static int _exceptionTypes_offset;
739 static int _slot_offset;
740 static int _modifiers_offset;
741 static int _signature_offset;
742 static int _annotations_offset;
743 static int _parameter_annotations_offset;
744 static int _annotation_default_offset;
745
746 static void compute_offsets();
747 public:
748 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
749
750 // Allocation
751 static Handle create(TRAPS);
752
753 // Accessors
754 static oop clazz(oop reflect);
755 static void set_clazz(oop reflect, oop value);
756
757 static void set_name(oop method, oop value);
758
759 static oop return_type(oop method);
760 static void set_return_type(oop method, oop value);
761
762 static oop parameter_types(oop method);
763 static void set_parameter_types(oop method, oop value);
764
765 static int slot(oop reflect);
766 static void set_slot(oop reflect, int value);
767
768 static void set_exception_types(oop method, oop value);
769 static void set_modifiers(oop method, int value);
770 static void set_signature(oop method, oop value);
771 static void set_annotations(oop method, oop value);
772 static void set_parameter_annotations(oop method, oop value);
773 static void set_annotation_default(oop method, oop value);
774
775 // Debugging
776 friend class JavaClasses;
777 };
778
779
780 // Interface to java.lang.reflect.Constructor objects
781
782 class java_lang_reflect_Constructor : public java_lang_reflect_AccessibleObject {
783 private:
784 // Note that to reduce dependencies on the JDK we compute these
785 // offsets at run-time.
786 static int _clazz_offset;
787 static int _parameterTypes_offset;
788 static int _exceptionTypes_offset;
789 static int _slot_offset;
790 static int _modifiers_offset;
791 static int _signature_offset;
792 static int _annotations_offset;
793 static int _parameter_annotations_offset;
794
795 static void compute_offsets();
796 public:
797 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
798
799 // Allocation
800 static Handle create(TRAPS);
801
802 // Accessors
803 static oop clazz(oop reflect);
804 static void set_clazz(oop reflect, oop value);
805
806 static oop parameter_types(oop constructor);
807 static void set_parameter_types(oop constructor, oop value);
808
809 static int slot(oop reflect);
810 static void set_slot(oop reflect, int value);
811
812 static void set_exception_types(oop constructor, oop value);
813 static void set_modifiers(oop constructor, int value);
814 static void set_signature(oop constructor, oop value);
815 static void set_annotations(oop constructor, oop value);
816 static void set_parameter_annotations(oop method, oop value);
817
818 // Debugging
819 friend class JavaClasses;
820 };
821
822
823 // Interface to java.lang.reflect.Field objects
824
825 class java_lang_reflect_Field : public java_lang_reflect_AccessibleObject {
826 private:
827 // Note that to reduce dependencies on the JDK we compute these
828 // offsets at run-time.
829 static int _clazz_offset;
830 static int _name_offset;
831 static int _type_offset;
832 static int _slot_offset;
833 static int _modifiers_offset;
834 static int _trusted_final_offset;
835 static int _signature_offset;
836 static int _annotations_offset;
837
838 static void compute_offsets();
839
840 public:
841 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
842
843 // Allocation
844 static Handle create(TRAPS);
845
846 // Accessors
847 static oop clazz(oop reflect);
848 static void set_clazz(oop reflect, oop value);
849
850 static oop name(oop field);
851 static void set_name(oop field, oop value);
852
853 static oop type(oop field);
854 static void set_type(oop field, oop value);
855
856 static int slot(oop reflect);
857 static void set_slot(oop reflect, int value);
858
859 static int modifiers(oop field);
860 static void set_modifiers(oop field, int value);
861
862 static void set_trusted_final(oop field);
863
864 static void set_signature(oop constructor, oop value);
865 static void set_annotations(oop constructor, oop value);
866
867 // Debugging
868 friend class JavaClasses;
869 };
870
871 class java_lang_reflect_Parameter {
872 private:
873 // Note that to reduce dependencies on the JDK we compute these
874 // offsets at run-time.
875 static int _name_offset;
876 static int _modifiers_offset;
877 static int _index_offset;
878 static int _executable_offset;
879
880 static void compute_offsets();
881
882 public:
883 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
884
885 // Allocation
886 static Handle create(TRAPS);
887
888 // Accessors
889 static oop name(oop field);
890 static void set_name(oop field, oop value);
891
892 static int index(oop reflect);
893 static void set_index(oop reflect, int value);
894
895 static int modifiers(oop reflect);
896 static void set_modifiers(oop reflect, int value);
897
898 static oop executable(oop constructor);
899 static void set_executable(oop constructor, oop value);
900
901 friend class JavaClasses;
902 };
903
904 #define MODULE_INJECTED_FIELDS(macro) \
905 macro(java_lang_Module, module_entry, intptr_signature, false)
906
907 class java_lang_Module {
908 private:
909 static int _loader_offset;
910 static int _name_offset;
911 static int _module_entry_offset;
912
913 static void compute_offsets();
914
915 public:
916 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
917
918 // Allocation
919 static Handle create(Handle loader, Handle module_name, TRAPS);
920
921 // Testers
922 static bool is_instance(oop obj);
923
924 // Accessors
925 static oop loader(oop module);
926 static void set_loader(oop module, oop value);
927
928 // CDS
929 static int module_entry_offset() { return _module_entry_offset; }
930
931 static oop name(oop module);
932 static void set_name(oop module, oop value);
933
934 static ModuleEntry* module_entry(oop module);
935 static ModuleEntry* module_entry_raw(oop module);
936 static void set_module_entry(oop module, ModuleEntry* module_entry);
937
938 friend class JavaClasses;
939 };
940
941 // Interface to jdk.internal.reflect.ConstantPool objects
942 class reflect_ConstantPool {
943 private:
944 // Note that to reduce dependencies on the JDK we compute these
945 // offsets at run-time.
946 static int _oop_offset;
947
948 static void compute_offsets();
949
950 public:
951 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
952
953 // Allocation
954 static Handle create(TRAPS);
955
956 // Accessors
957 static void set_cp(oop reflect, ConstantPool* value);
958 static int oop_offset() { CHECK_INIT(_oop_offset); }
959
960 static ConstantPool* get_cp(oop reflect);
961
962 // Debugging
963 friend class JavaClasses;
964 };
965
966
967 // Interface to java.lang primitive type boxing objects:
968 // - java.lang.Boolean
969 // - java.lang.Character
970 // - java.lang.Float
971 // - java.lang.Double
972 // - java.lang.Byte
973 // - java.lang.Short
974 // - java.lang.Integer
975 // - java.lang.Long
976
977 // This could be separated out into 8 individual classes.
978
979 class java_lang_boxing_object: AllStatic {
980 private:
981 static int _value_offset;
982 static int _long_value_offset;
983
984 static void compute_offsets();
985 static oop initialize_and_allocate(BasicType type, TRAPS);
986 public:
987 // Allocation. Returns a boxed value, or null for invalid type.
988 static oop create(BasicType type, jvalue* value, TRAPS);
989 // Accessors. Returns the basic type being boxed, or T_ILLEGAL for invalid oop.
990 static BasicType get_value(oop box, jvalue* value);
991 static BasicType set_value(oop box, jvalue* value);
992 static BasicType basic_type(oop box);
993 static bool is_instance(oop box) { return basic_type(box) != T_ILLEGAL; }
994 static bool is_instance(oop box, BasicType type) { return basic_type(box) == type; }
995 static void print(oop box, outputStream* st) { jvalue value; print(get_value(box, &value), &value, st); }
996 static void print(BasicType type, jvalue* value, outputStream* st);
997
998 static int value_offset(BasicType type) {
999 return is_double_word_type(type) ? _long_value_offset : _value_offset;
1000 }
1001
1002 static void serialize_offsets(SerializeClosure* f);
1003
1004 // Debugging
1005 friend class JavaClasses;
1006 };
1007
1008
1009
1010 // Interface to java.lang.ref.Reference objects
1011
1012 class java_lang_ref_Reference: AllStatic {
1013 static int _referent_offset;
1014 static int _queue_offset;
1015 static int _next_offset;
1016 static int _discovered_offset;
1017
1018 static bool _offsets_initialized;
1019
1020 public:
1021 // Accessors
1022 static inline oop weak_referent_no_keepalive(oop ref);
1023 static inline oop weak_referent(oop ref);
1024 static inline oop phantom_referent_no_keepalive(oop ref);
1025 static inline oop unknown_referent_no_keepalive(oop ref);
1026 static inline void clear_referent(oop ref);
1027 static inline void clear_referent_raw(oop ref);
1028 static inline HeapWord* referent_addr_raw(oop ref);
1029 static inline oop next(oop ref);
1030 static inline void set_next(oop ref, oop value);
1031 static inline void set_next_raw(oop ref, oop value);
1032 static inline HeapWord* next_addr_raw(oop ref);
1033 static inline oop discovered(oop ref);
1034 static inline void set_discovered(oop ref, oop value);
1035 static inline void set_discovered_raw(oop ref, oop value);
1036 static inline HeapWord* discovered_addr_raw(oop ref);
1037 static bool is_referent_field(oop obj, ptrdiff_t offset);
1038 static inline bool is_final(oop ref);
1039 static inline bool is_phantom(oop ref);
1040 static inline bool is_weak(oop ref);
1041 static inline bool is_soft(oop ref);
1042
1043 static int referent_offset() { CHECK_INIT(_referent_offset); }
1044 static int queue_offset() { CHECK_INIT(_queue_offset); }
1045 static int next_offset() { CHECK_INIT(_next_offset); }
1046 static int discovered_offset() { CHECK_INIT(_discovered_offset); }
1047
1048 static void compute_offsets();
1049 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1050 };
1051
1052
1053 // Interface to java.lang.ref.SoftReference objects
1054
1055 class java_lang_ref_SoftReference: public java_lang_ref_Reference {
1056 static int _timestamp_offset;
1057 static int _static_clock_offset;
1058
1059 public:
1060 // Accessors
1061 static jlong timestamp(oop ref);
1062
1063 // Accessors for statics
1064 static jlong clock();
1065 static void set_clock(jlong value);
1066
1067 static void compute_offsets();
1068 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1069 };
1070
1071 // Interface to java.lang.invoke.MethodHandle objects
1072
1073 class java_lang_invoke_MethodHandle: AllStatic {
1074 friend class JavaClasses;
1075
1076 private:
1077 static int _type_offset; // the MethodType of this MH
1078 static int _form_offset; // the LambdaForm of this MH
1079
1080 static void compute_offsets();
1081
1082 public:
1083 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1084
1085 // Accessors
1086 static oop type(oop mh);
1087 static void set_type(oop mh, oop mtype);
1088
1089 static oop form(oop mh);
1090 static void set_form(oop mh, oop lform);
1091
1092 // Testers
1093 static bool is_subclass(Klass* klass) {
1094 return klass->is_subclass_of(vmClasses::MethodHandle_klass());
1095 }
1096 static bool is_instance(oop obj);
1097
1098 // Accessors for code generation:
1099 static int type_offset() { CHECK_INIT(_type_offset); }
1100 static int form_offset() { CHECK_INIT(_form_offset); }
1101 };
1102
1103 // Interface to java.lang.invoke.DirectMethodHandle objects
1104
1105 class java_lang_invoke_DirectMethodHandle: AllStatic {
1106 friend class JavaClasses;
1107
1108 private:
1109 static int _member_offset; // the MemberName of this DMH
1110
1111 static void compute_offsets();
1112
1113 public:
1114 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1115
1116 // Accessors
1117 static oop member(oop mh);
1118
1119 // Testers
1120 static bool is_subclass(Klass* klass) {
1121 return klass->is_subclass_of(vmClasses::DirectMethodHandle_klass());
1122 }
1123 static bool is_instance(oop obj);
1124
1125 // Accessors for code generation:
1126 static int member_offset() { CHECK_INIT(_member_offset); }
1127 };
1128
1129 // Interface to java.lang.invoke.LambdaForm objects
1130 // (These are a private interface for managing adapter code generation.)
1131
1132 class java_lang_invoke_LambdaForm: AllStatic {
1133 friend class JavaClasses;
1134
1135 private:
1136 static int _vmentry_offset; // type is MemberName
1137
1138 static void compute_offsets();
1139
1140 public:
1141 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1142
1143 // Accessors
1144 static oop vmentry(oop lform);
1145
1146 // Testers
1147 static bool is_subclass(Klass* klass) {
1148 return vmClasses::LambdaForm_klass() != nullptr &&
1149 klass->is_subclass_of(vmClasses::LambdaForm_klass());
1150 }
1151 static bool is_instance(oop obj);
1152
1153 // Accessors for code generation:
1154 static int vmentry_offset() { CHECK_INIT(_vmentry_offset); }
1155 };
1156
1157 // Interface to java.lang.invoke.NativeEntryPoint objects
1158 // (These are a private interface for managing adapter code generation.)
1159
1160 class jdk_internal_foreign_abi_NativeEntryPoint: AllStatic {
1161 friend class JavaClasses;
1162
1163 private:
1164 static int _method_type_offset;
1165 static int _downcall_stub_address_offset;
1166
1167 static void compute_offsets();
1168
1169 public:
1170 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1171
1172 // Accessors
1173 static oop method_type(oop entry);
1174 static jlong downcall_stub_address(oop entry);
1175
1176 // Testers
1177 static bool is_subclass(Klass* klass) {
1178 return vmClasses::NativeEntryPoint_klass() != nullptr &&
1179 klass->is_subclass_of(vmClasses::NativeEntryPoint_klass());
1180 }
1181 static bool is_instance(oop obj);
1182
1183 // Accessors for code generation:
1184 static int method_type_offset_in_bytes() { return _method_type_offset; }
1185 static int downcall_stub_address_offset_in_bytes() { return _downcall_stub_address_offset; }
1186 };
1187
1188 class jdk_internal_foreign_abi_ABIDescriptor: AllStatic {
1189 friend class JavaClasses;
1190
1191 private:
1192 static int _inputStorage_offset;
1193 static int _outputStorage_offset;
1194 static int _volatileStorage_offset;
1195 static int _stackAlignment_offset;
1196 static int _shadowSpace_offset;
1197 static int _scratch1_offset;
1198 static int _scratch2_offset;
1199
1200 static void compute_offsets();
1201
1202 public:
1203 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1204
1205 // Accessors
1206 static objArrayOop inputStorage(oop entry);
1207 static objArrayOop outputStorage(oop entry);
1208 static objArrayOop volatileStorage(oop entry);
1209 static jint stackAlignment(oop entry);
1210 static jint shadowSpace(oop entry);
1211 static oop scratch1(oop entry);
1212 static oop scratch2(oop entry);
1213
1214 // Testers
1215 static bool is_subclass(Klass* klass) {
1216 return vmClasses::ABIDescriptor_klass() != nullptr &&
1217 klass->is_subclass_of(vmClasses::ABIDescriptor_klass());
1218 }
1219 static bool is_instance(oop obj);
1220 };
1221
1222 class jdk_internal_foreign_abi_VMStorage: AllStatic {
1223 friend class JavaClasses;
1224
1225 private:
1226 static int _type_offset;
1227 static int _indexOrOffset_offset;
1228 static int _segmentMaskOrSize_offset;
1229 static int _debugName_offset;
1230
1231 static void compute_offsets();
1232
1233 public:
1234 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1235
1236 // Accessors
1237 static jbyte type(oop entry);
1238 static jint index_or_offset(oop entry);
1239 static jshort segment_mask_or_size(oop entry);
1240 static oop debugName(oop entry);
1241
1242 // Testers
1243 static bool is_subclass(Klass* klass) {
1244 return vmClasses::VMStorage_klass() != nullptr &&
1245 klass->is_subclass_of(vmClasses::VMStorage_klass());
1246 }
1247 static bool is_instance(oop obj);
1248 };
1249
1250 class jdk_internal_foreign_abi_CallConv: AllStatic {
1251 friend class JavaClasses;
1252
1253 private:
1254 static int _argRegs_offset;
1255 static int _retRegs_offset;
1256
1257 static void compute_offsets();
1258
1259 public:
1260 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1261
1262 // Accessors
1263 static objArrayOop argRegs(oop entry);
1264 static objArrayOop retRegs(oop entry);
1265
1266 // Testers
1267 static bool is_subclass(Klass* klass) {
1268 return vmClasses::CallConv_klass() != nullptr &&
1269 klass->is_subclass_of(vmClasses::CallConv_klass());
1270 }
1271 static bool is_instance(oop obj);
1272 };
1273
1274 // Interface to java.lang.invoke.MemberName objects
1275 // (These are a private interface for Java code to query the class hierarchy.)
1276
1277 #define RESOLVEDMETHOD_INJECTED_FIELDS(macro) \
1278 macro(java_lang_invoke_ResolvedMethodName, vmtarget, intptr_signature, false)
1279
1280 class java_lang_invoke_ResolvedMethodName : AllStatic {
1281 friend class JavaClasses;
1282
1283 static int _vmtarget_offset;
1284 static int _vmholder_offset;
1285
1286 static void compute_offsets();
1287 public:
1288 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1289
1290 static int vmtarget_offset() { CHECK_INIT(_vmtarget_offset); }
1291
1292 static Method* vmtarget(oop resolved_method);
1293 static void set_vmtarget(oop resolved_method, Method* method);
1294
1295 static void set_vmholder(oop resolved_method, oop holder);
1296
1297 // find or create resolved member name
1298 static oop find_resolved_method(const methodHandle& m, TRAPS);
1299
1300 static bool is_instance(oop resolved_method);
1301 };
1302
1303
1304 #define MEMBERNAME_INJECTED_FIELDS(macro) \
1305 macro(java_lang_invoke_MemberName, vmindex, intptr_signature, false)
1306
1307
1308 class java_lang_invoke_MemberName: AllStatic {
1309 friend class JavaClasses;
1310
1311 private:
1312 // From java.lang.invoke.MemberName:
1313 // private Class<?> clazz; // class in which the method is defined
1314 // private String name; // may be null if not yet materialized
1315 // private Object type; // may be null if not yet materialized
1316 // private int flags; // modifier bits; see reflect.Modifier
1317 // private ResolvedMethodName method; // holds VM-specific target value
1318 // private intptr_t vmindex; // member index within class or interface
1319 static int _clazz_offset;
1320 static int _name_offset;
1321 static int _type_offset;
1322 static int _flags_offset;
1323 static int _method_offset;
1324 static int _vmindex_offset;
1325
1326 static void compute_offsets();
1327
1328 public:
1329 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1330 // Accessors
1331 static oop clazz(oop mname);
1332 static void set_clazz(oop mname, oop clazz);
1333
1334 static oop type(oop mname);
1335 static void set_type(oop mname, oop type);
1336
1337 static oop name(oop mname);
1338 static void set_name(oop mname, oop name);
1339
1340 static int flags(oop mname);
1341 static void set_flags(oop mname, int flags);
1342
1343 // Link through ResolvedMethodName field to get Method*
1344 static Method* vmtarget(oop mname);
1345 static void set_method(oop mname, oop method);
1346
1347 static intptr_t vmindex(oop mname);
1348 static void set_vmindex(oop mname, intptr_t index);
1349
1350 // Testers
1351 static bool is_subclass(Klass* klass) {
1352 return klass->is_subclass_of(vmClasses::MemberName_klass());
1353 }
1354 static bool is_instance(oop obj);
1355
1356 static bool is_method(oop obj);
1357
1358 // Relevant integer codes (keep these in synch. with MethodHandleNatives.Constants):
1359 enum {
1360 MN_IS_METHOD = 0x00010000, // method (not constructor)
1361 MN_IS_CONSTRUCTOR = 0x00020000, // constructor
1362 MN_IS_FIELD = 0x00040000, // field
1363 MN_IS_TYPE = 0x00080000, // nested type
1364 MN_CALLER_SENSITIVE = 0x00100000, // @CallerSensitive annotation detected
1365 MN_TRUSTED_FINAL = 0x00200000, // trusted final field
1366 MN_HIDDEN_MEMBER = 0x00400000, // @Hidden annotation detected
1367 MN_REFERENCE_KIND_SHIFT = 24, // refKind
1368 MN_REFERENCE_KIND_MASK = 0x0F000000 >> MN_REFERENCE_KIND_SHIFT,
1369 MN_NESTMATE_CLASS = 0x00000001,
1370 MN_HIDDEN_CLASS = 0x00000002,
1371 MN_STRONG_LOADER_LINK = 0x00000004,
1372 MN_ACCESS_VM_ANNOTATIONS = 0x00000008,
1373 // Lookup modes
1374 MN_MODULE_MODE = 0x00000010,
1375 MN_UNCONDITIONAL_MODE = 0x00000020,
1376 MN_TRUSTED_MODE = -1
1377 };
1378
1379 // Accessors for code generation:
1380 static int clazz_offset() { CHECK_INIT(_clazz_offset); }
1381 static int type_offset() { CHECK_INIT(_type_offset); }
1382 static int flags_offset() { CHECK_INIT(_flags_offset); }
1383 static int method_offset() { CHECK_INIT(_method_offset); }
1384 static int vmindex_offset() { CHECK_INIT(_vmindex_offset); }
1385 };
1386
1387
1388 // Interface to java.lang.invoke.MethodType objects
1389
1390 class java_lang_invoke_MethodType: AllStatic {
1391 friend class JavaClasses;
1392
1393 private:
1394 static int _rtype_offset;
1395 static int _ptypes_offset;
1396
1397 static void compute_offsets();
1398
1399 public:
1400 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1401 // Accessors
1402 static oop rtype(oop mt);
1403 static objArrayOop ptypes(oop mt);
1404
1405 static oop ptype(oop mt, int index);
1406 static int ptype_count(oop mt);
1407
1408 static int ptype_slot_count(oop mt); // extra counts for long/double
1409 static int rtype_slot_count(oop mt); // extra counts for long/double
1410
1411 static Symbol* as_signature(oop mt, bool intern_if_not_found);
1412 static void print_signature(oop mt, outputStream* st);
1413
1414 static bool is_instance(oop obj);
1415
1416 static bool equals(oop mt1, oop mt2);
1417
1418 // Accessors for code generation:
1419 static int rtype_offset() { CHECK_INIT(_rtype_offset); }
1420 static int ptypes_offset() { CHECK_INIT(_ptypes_offset); }
1421 };
1422
1423
1424 // Interface to java.lang.invoke.CallSite objects
1425 #define CALLSITE_INJECTED_FIELDS(macro) \
1426 macro(java_lang_invoke_CallSite, vmdependencies, intptr_signature, false) \
1427 macro(java_lang_invoke_CallSite, last_cleanup, long_signature, false)
1428
1429 class java_lang_invoke_CallSite: AllStatic {
1430 friend class JavaClasses;
1431
1432 private:
1433 static int _target_offset;
1434 static int _vmdependencies_offset;
1435 static int _last_cleanup_offset;
1436
1437 static void compute_offsets();
1438
1439 public:
1440 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1441 // Accessors
1442 static oop target( oop site);
1443 static void set_target( oop site, oop target);
1444 static void set_target_volatile( oop site, oop target);
1445
1446 static DependencyContext vmdependencies(oop call_site);
1447
1448 // Testers
1449 static bool is_subclass(Klass* klass) {
1450 return klass->is_subclass_of(vmClasses::CallSite_klass());
1451 }
1452 static bool is_instance(oop obj);
1453
1454 // Accessors for code generation:
1455 static int target_offset() { CHECK_INIT(_target_offset); }
1456 };
1457
1458 // Interface to java.lang.invoke.ConstantCallSite objects
1459
1460 class java_lang_invoke_ConstantCallSite: AllStatic {
1461 friend class JavaClasses;
1462
1463 private:
1464 static int _is_frozen_offset;
1465
1466 static void compute_offsets();
1467
1468 public:
1469 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1470 // Accessors
1471 static jboolean is_frozen(oop site);
1472
1473 // Testers
1474 static bool is_subclass(Klass* klass) {
1475 return klass->is_subclass_of(vmClasses::ConstantCallSite_klass());
1476 }
1477 static bool is_instance(oop obj);
1478 };
1479
1480 // Interface to java.lang.ClassLoader objects
1481
1482 #define CLASSLOADER_INJECTED_FIELDS(macro) \
1483 macro(java_lang_ClassLoader, loader_data, intptr_signature, false)
1484
1485 class java_lang_ClassLoader : AllStatic {
1486 private:
1487 static int _loader_data_offset;
1488 static int _parent_offset;
1489 static int _parallelCapable_offset;
1490 static int _name_offset;
1491 static int _nameAndId_offset;
1492 static int _unnamedModule_offset;
1493
1494 static void compute_offsets();
1495
1496 public:
1497 // Support for CDS
1498 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1499 static int loader_data_offset() { return _loader_data_offset; }
1500
1501 static ClassLoaderData* loader_data_acquire(oop loader);
1502 static ClassLoaderData* loader_data(oop loader);
1503 static void release_set_loader_data(oop loader, ClassLoaderData* new_data);
1504
1505 static oop parent(oop loader);
1506 static oop parent_no_keepalive(oop loader);
1507 static oop name(oop loader);
1508 static oop nameAndId(oop loader);
1509 static bool isAncestor(oop loader, oop cl);
1510
1511 // Support for parallelCapable field
1512 static bool parallelCapable(oop the_class_mirror);
1513
1514 static bool is_trusted_loader(oop loader);
1515
1516 // Testers
1517 static bool is_subclass(Klass* klass) {
1518 return klass->is_subclass_of(vmClasses::ClassLoader_klass());
1519 }
1520 static bool is_instance(oop obj);
1521
1522 static oop unnamedModule(oop loader);
1523
1524 // Debugging
1525 friend class JavaClasses;
1526 };
1527
1528
1529 // Interface to java.lang.System objects
1530
1531 class java_lang_System : AllStatic {
1532 private:
1533 static int _static_in_offset;
1534 static int _static_out_offset;
1535 static int _static_err_offset;
1536
1537 public:
1538 static int in_offset() { CHECK_INIT(_static_in_offset); }
1539 static int out_offset() { CHECK_INIT(_static_out_offset); }
1540 static int err_offset() { CHECK_INIT(_static_err_offset); }
1541
1542 static void compute_offsets();
1543 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1544
1545 // Debugging
1546 friend class JavaClasses;
1547 };
1548
1549
1550 // Interface to java.lang.StackTraceElement objects
1551
1552 class java_lang_StackTraceElement: AllStatic {
1553 private:
1554 static int _declaringClassObject_offset;
1555 static int _classLoaderName_offset;
1556 static int _moduleName_offset;
1557 static int _moduleVersion_offset;
1558 static int _declaringClass_offset;
1559 static int _methodName_offset;
1560 static int _fileName_offset;
1561 static int _lineNumber_offset;
1562
1563 // Setters
1564 static void set_classLoaderName(oop element, oop value);
1565 static void set_moduleName(oop element, oop value);
1566 static void set_moduleVersion(oop element, oop value);
1567 static void set_declaringClass(oop element, oop value);
1568 static void set_methodName(oop element, oop value);
1569 static void set_fileName(oop element, oop value);
1570 static void set_lineNumber(oop element, int value);
1571 static void set_declaringClassObject(oop element, oop value);
1572
1573 static void decode_file_and_line(Handle java_mirror, InstanceKlass* holder, int version,
1574 const methodHandle& method, int bci,
1575 Symbol*& source, oop& source_file, int& line_number, TRAPS);
1576
1577 public:
1578 // Create an instance of StackTraceElement
1579 static oop create(const methodHandle& method, int bci, TRAPS);
1580
1581 static void fill_in(Handle element, InstanceKlass* holder, const methodHandle& method,
1582 int version, int bci, Symbol* name, TRAPS);
1583
1584 static void compute_offsets();
1585 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1586
1587 #if INCLUDE_JVMCI
1588 static void decode(const methodHandle& method, int bci, Symbol*& fileName, int& lineNumber, TRAPS);
1589 #endif
1590
1591 // Debugging
1592 friend class JavaClasses;
1593 };
1594
1595
1596 class Backtrace: AllStatic {
1597 public:
1598 // Helper backtrace functions to store bci|version together.
1599 static int merge_bci_and_version(int bci, int version);
1600 static int merge_mid_and_cpref(int mid, int cpref);
1601 static int bci_at(unsigned int merged);
1602 static int version_at(unsigned int merged);
1603 static int mid_at(unsigned int merged);
1604 static int cpref_at(unsigned int merged);
1605 static int get_line_number(Method* method, int bci);
1606 static Symbol* get_source_file_name(InstanceKlass* holder, int version);
1607
1608 // Debugging
1609 friend class JavaClasses;
1610 };
1611
1612 class java_lang_ClassFrameInfo: AllStatic {
1613 private:
1614 static int _classOrMemberName_offset;
1615 static int _flags_offset;
1616
1617 public:
1618 static oop classOrMemberName(oop info);
1619 static int flags(oop info);
1620
1621 // Setters
1622 static void init_class(Handle stackFrame, const methodHandle& m);
1623 static void init_method(Handle stackFrame, const methodHandle& m, TRAPS);
1624
1625 static void compute_offsets();
1626 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1627
1628 // Debugging
1629 friend class JavaClasses;
1630 };
1631
1632 // Interface to java.lang.StackFrameInfo objects
1633
1634 #define STACKFRAMEINFO_INJECTED_FIELDS(macro) \
1635 macro(java_lang_StackFrameInfo, version, short_signature, false)
1636
1637 class java_lang_StackFrameInfo: AllStatic {
1638 private:
1639 static int _type_offset;
1640 static int _name_offset;
1641 static int _bci_offset;
1642 static int _version_offset;
1643 static int _contScope_offset;
1644
1645 public:
1646 // Getters
1647 static oop name(oop info);
1648 static oop type(oop info);
1649 static Method* get_method(oop info);
1650
1651 // Setters
1652 static void set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, oop cont, TRAPS);
1653 static void set_name(oop info, oop value);
1654 static void set_type(oop info, oop value);
1655 static void set_bci(oop info, int value);
1656
1657 static void set_version(oop info, short value);
1658 static void set_contScope(oop info, oop value);
1659
1660 static void compute_offsets();
1661 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1662
1663 static void to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS);
1664
1665 // Debugging
1666 friend class JavaClasses;
1667 };
1668
1669 class java_lang_LiveStackFrameInfo: AllStatic {
1670 private:
1671 static int _monitors_offset;
1672 static int _locals_offset;
1673 static int _operands_offset;
1674 static int _mode_offset;
1675
1676 public:
1677 static void set_monitors(oop info, oop value);
1678 static void set_locals(oop info, oop value);
1679 static void set_operands(oop info, oop value);
1680 static void set_mode(oop info, int value);
1681
1682 static void compute_offsets();
1683 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1684
1685 // Debugging
1686 friend class JavaClasses;
1687 };
1688
1689 // Interface to java.lang.reflect.RecordComponent objects
1690
1691 class java_lang_reflect_RecordComponent: AllStatic {
1692 private:
1693 static int _clazz_offset;
1694 static int _name_offset;
1695 static int _type_offset;
1696 static int _accessor_offset;
1697 static int _signature_offset;
1698 static int _annotations_offset;
1699 static int _typeAnnotations_offset;
1700
1701 // Setters
1702 static void set_clazz(oop element, oop value);
1703 static void set_name(oop element, oop value);
1704 static void set_type(oop element, oop value);
1705 static void set_accessor(oop element, oop value);
1706 static void set_signature(oop element, oop value);
1707 static void set_annotations(oop element, oop value);
1708 static void set_typeAnnotations(oop element, oop value);
1709
1710 public:
1711 // Create an instance of RecordComponent
1712 static oop create(InstanceKlass* holder, RecordComponent* component, TRAPS);
1713
1714 static void compute_offsets();
1715 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1716
1717 // Debugging
1718 friend class JavaClasses;
1719 };
1720
1721
1722 // Interface to java.lang.AssertionStatusDirectives objects
1723
1724 class java_lang_AssertionStatusDirectives: AllStatic {
1725 private:
1726 static int _classes_offset;
1727 static int _classEnabled_offset;
1728 static int _packages_offset;
1729 static int _packageEnabled_offset;
1730 static int _deflt_offset;
1731
1732 public:
1733 // Setters
1734 static void set_classes(oop obj, oop val);
1735 static void set_classEnabled(oop obj, oop val);
1736 static void set_packages(oop obj, oop val);
1737 static void set_packageEnabled(oop obj, oop val);
1738 static void set_deflt(oop obj, bool val);
1739
1740 static void compute_offsets();
1741 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1742
1743 // Debugging
1744 friend class JavaClasses;
1745 };
1746
1747
1748 class java_util_concurrent_locks_AbstractOwnableSynchronizer : AllStatic {
1749 private:
1750 static int _owner_offset;
1751 public:
1752 static void compute_offsets();
1753 static oop get_owner_threadObj(oop obj);
1754 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1755 };
1756
1757 // Interface to jdk.internal.misc.UnsafeConsants
1758
1759 class jdk_internal_misc_UnsafeConstants : AllStatic {
1760 public:
1761 static void set_unsafe_constants();
1762 static void compute_offsets() { }
1763 static void serialize_offsets(SerializeClosure* f) { }
1764 };
1765
1766 // Interface to jdk.internal.vm.vector.VectorSupport.VectorPayload objects
1767
1768 class vector_VectorPayload : AllStatic {
1769 private:
1770 static int _payload_offset;
1771 public:
1772 static void set_payload(oop o, oop val);
1773
1774 static void compute_offsets();
1775 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1776
1777 // Testers
1778 static bool is_subclass(Klass* klass) {
1779 return klass->is_subclass_of(vmClasses::vector_VectorPayload_klass());
1780 }
1781 static bool is_instance(oop obj);
1782 };
1783
1784 class java_lang_Integer : AllStatic {
1785 public:
1786 static jint value(oop obj);
1787 };
1788
1789 class java_lang_Long : AllStatic {
1790 public:
1791 static jlong value(oop obj);
1792 };
1793
1794 class java_lang_Character : AllStatic {
1795 public:
1796 static jchar value(oop obj);
1797 };
1798
1799 class java_lang_Short : AllStatic {
1800 public:
1801 static jshort value(oop obj);
1802 };
1803
1804 class java_lang_Byte : AllStatic {
1805 public:
1806 static jbyte value(oop obj);
1807 };
1808
1809 class java_lang_Boolean : AllStatic {
1810 private:
1811 static int _static_TRUE_offset;
1812 static int _static_FALSE_offset;
1813 public:
1814 static Symbol* symbol();
1815 static void compute_offsets(InstanceKlass* k);
1816 static oop get_TRUE(InstanceKlass *k);
1817 static oop get_FALSE(InstanceKlass *k);
1818 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1819 static jboolean value(oop obj);
1820 };
1821
1822 class java_lang_Integer_IntegerCache : AllStatic {
1823 private:
1824 static int _static_cache_offset;
1825 public:
1826 static Symbol* symbol();
1827 static void compute_offsets(InstanceKlass* k);
1828 static objArrayOop cache(InstanceKlass *k);
1829 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1830 };
1831
1832 class java_lang_Long_LongCache : AllStatic {
1833 private:
1834 static int _static_cache_offset;
1835 public:
1836 static Symbol* symbol();
1837 static void compute_offsets(InstanceKlass* k);
1838 static objArrayOop cache(InstanceKlass *k);
1839 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1840 };
1841
1842 class java_lang_Character_CharacterCache : AllStatic {
1843 private:
1844 static int _static_cache_offset;
1845 public:
1846 static Symbol* symbol();
1847 static void compute_offsets(InstanceKlass* k);
1848 static objArrayOop cache(InstanceKlass *k);
1849 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1850 };
1851
1852 class java_lang_Short_ShortCache : AllStatic {
1853 private:
1854 static int _static_cache_offset;
1855 public:
1856 static Symbol* symbol();
1857 static void compute_offsets(InstanceKlass* k);
1858 static objArrayOop cache(InstanceKlass *k);
1859 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1860 };
1861
1862 class java_lang_Byte_ByteCache : AllStatic {
1863 private:
1864 static int _static_cache_offset;
1865 public:
1866 static Symbol* symbol();
1867 static void compute_offsets(InstanceKlass* k);
1868 static objArrayOop cache(InstanceKlass *k);
1869 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1870 };
1871
1872
1873 // Interface to java.lang.InternalError objects
1874
1875 #define INTERNALERROR_INJECTED_FIELDS(macro) \
1876 macro(java_lang_InternalError, during_unsafe_access, bool_signature, false)
1877
1878 class java_lang_InternalError : AllStatic {
1879 private:
1880 static int _during_unsafe_access_offset;
1881 public:
1882 static jboolean during_unsafe_access(oop internal_error);
1883 static void set_during_unsafe_access(oop internal_error);
1884 static void compute_offsets();
1885 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1886 };
1887
1888 // Use to declare fields that need to be injected into Java classes
1889 // for the JVM to use. The name_index and signature_index are
1890 // declared in vmSymbols. The may_be_java flag is used to declare
1891 // fields that might already exist in Java but should be injected if
1892 // they don't. Otherwise the field is unconditionally injected and
1893 // the JVM uses the injected one. This is to ensure that name
1894 // collisions don't occur. In general may_be_java should be false
1895 // unless there's a good reason.
1896
1897 class InjectedField {
1898 public:
1899 const vmClassID klass_id;
1900 const vmSymbolID name_index;
1901 const vmSymbolID signature_index;
1902 const bool may_be_java;
1903
1904
1905 Klass* klass() const { return vmClasses::klass_at(klass_id); }
1906 Symbol* name() const { return lookup_symbol(name_index); }
1907 Symbol* signature() const { return lookup_symbol(signature_index); }
1908
1909 int compute_offset();
1910
1911 // Find the Symbol for this index
1912 static Symbol* lookup_symbol(vmSymbolID symbol_index) {
1913 return Symbol::vm_symbol_at(symbol_index);
1914 }
1915 };
1916
1917
1918 // Interface to hard-coded offset checking
1919
1920 enum class InjectedFieldID : int;
1921
1922 class JavaClasses : AllStatic {
1923 private:
1924
1925 static InjectedField _injected_fields[];
1926
1927 static bool check_offset(const char *klass_name, int offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1928 public:
1929
1930 static int compute_injected_offset(InjectedFieldID id);
1931
1932 static void compute_offsets();
1933 static void check_offsets() PRODUCT_RETURN;
1934 static void serialize_offsets(SerializeClosure* soc) NOT_CDS_RETURN;
1935 static InjectedField* get_injected(Symbol* class_name, int* field_count);
1936 static bool is_supported_for_archiving(oop obj) NOT_CDS_JAVA_HEAP_RETURN_(false);
1937
1938 static void compute_offset(int &dest_offset,
1939 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol,
1940 bool is_static = false);
1941 static void compute_offset(int& dest_offset, InstanceKlass* ik,
1942 const char* name_string, Symbol* signature_symbol,
1943 bool is_static = false);
1944 };
1945
1946 #undef CHECK_INIT
1947
1948 #endif // SHARE_CLASSFILE_JAVACLASSES_HPP