1 /*
2 * Copyright (c) 1997, 2026, 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 HeapShared;
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(InstanceKlass* ik, 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
276 static void set_modifiers(oop java_class, u2 value);
277 static void set_raw_access_flags(oop java_class, u2 value);
278 static void set_is_primitive(oop java_class);
279 static void release_set_array_klass(oop java_class, Klass* klass);
280
281 public:
282 static void allocate_fixup_lists();
283 static void compute_offsets();
284
285 // Instance creation
286 static void allocate_mirror(Klass* k, bool is_scratch, Handle protection_domain, Handle classData,
287 Handle& mirror, Handle& comp_mirror, TRAPS); // returns mirror and comp_mirror
288 static void create_mirror(Klass* k, Handle class_loader, Handle module,
289 Handle protection_domain, Handle classData, TRAPS);
290 static void fixup_mirror(Klass* k, TRAPS);
291 static oop create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS);
292
293 // Archiving
294 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
295 static void create_scratch_mirror(Klass* k, TRAPS) NOT_CDS_JAVA_HEAP_RETURN;
296 static bool restore_archived_mirror(Klass *k, Handle class_loader, Handle module,
297 Handle protection_domain,
298 TRAPS) NOT_CDS_JAVA_HEAP_RETURN_(false);
299
300 static void fixup_module_field(Klass* k, Handle module);
301
302 // Conversion -- java_class must not be null. The return value is null only if java_class is a primitive type.
303 static Klass* as_Klass(oop java_class);
304 static InstanceKlass* as_InstanceKlass(oop java_class);
305
306 static void set_klass(oop java_class, Klass* klass);
307 static BasicType as_BasicType(oop java_class, Klass** reference_klass = nullptr);
308 static Symbol* as_signature(oop java_class, bool intern_if_not_found);
309 static void print_signature(oop java_class, outputStream *st);
310 static const char* as_external_name(oop java_class);
311 // Testing
312 static bool is_instance(oop obj);
313
314 static bool is_primitive(oop java_class);
315 static BasicType primitive_type(oop java_class);
316 static oop primitive_mirror(BasicType t);
317 static Klass* array_klass_acquire(oop java_class);
318
319 // compiler support for class operations
320 static int klass_offset() { CHECK_INIT(_klass_offset); }
321 static int array_klass_offset() { CHECK_INIT(_array_klass_offset); }
322 // Support for classRedefinedCount field
323 static int classRedefinedCount(oop the_class_mirror);
324 static void set_classRedefinedCount(oop the_class_mirror, int value);
325
326 // Support for embedded per-class oops
327 static oop protection_domain(oop java_class);
328 static oop init_lock(oop java_class);
329 static void clear_init_lock(oop java_class) {
330 set_init_lock(java_class, nullptr);
331 }
332 static oop component_mirror(oop java_class);
333 static int component_mirror_offset() { return _component_mirror_offset; }
334 static objArrayOop signers(oop java_class);
335 static oop class_data(oop java_class);
336 static void set_class_data(oop java_class, oop classData);
337 static int reflection_data_offset() { return _reflectionData_offset; }
338
339 static oop class_loader(oop java_class);
340 static void set_module(oop java_class, oop module);
341 static oop module(oop java_class);
342
343 static oop name(Handle java_class, TRAPS);
344
345 static oop source_file(oop java_class);
346 static void set_source_file(oop java_class, oop source_file);
347
348 static int modifiers(oop java_class);
349
350 static size_t oop_size(oop java_class);
351 static void set_oop_size(HeapWord* java_class, size_t size);
352 static int static_oop_field_count(oop java_class);
353 static void set_static_oop_field_count(oop java_class, int size);
354
355 static GrowableArray<Klass*>* fixup_mirror_list() {
356 return _fixup_mirror_list;
357 }
358 static void set_fixup_mirror_list(GrowableArray<Klass*>* v) {
359 _fixup_mirror_list = v;
360 }
361
362 static GrowableArray<Klass*>* fixup_module_field_list() {
363 return _fixup_module_field_list;
364 }
365 static void set_fixup_module_field_list(GrowableArray<Klass*>* v) {
366 _fixup_module_field_list = v;
367 }
368
369 // Debugging
370 friend class JavaClasses;
371 };
372
373 // Interface to java.lang.Thread objects
374
375 #define THREAD_INJECTED_FIELDS(macro) \
376 macro(java_lang_Thread, jvmti_thread_state, intptr_signature, false) \
377 macro(java_lang_Thread, vthread_transition_disable_count, int_signature, false) \
378 macro(java_lang_Thread, is_in_vthread_transition, bool_signature, false) \
379 JFR_ONLY(macro(java_lang_Thread, jfr_epoch, short_signature, false))
380
381 class java_lang_Thread : AllStatic {
382 friend class java_lang_VirtualThread;
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 _vthread_transition_disable_count_offset;
392 static int _is_in_vthread_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
446 static int vthread_transition_disable_count(oop java_thread);
447 static void inc_vthread_transition_disable_count(oop java_thread);
448 static void dec_vthread_transition_disable_count(oop java_thread);
449 static int vthread_transition_disable_count_offset() { return _vthread_transition_disable_count_offset; }
450
451 static bool is_in_vthread_transition(oop java_thread);
452 static void set_is_in_vthread_transition(oop java_thread, bool val);
453 static int is_in_vthread_transition_offset() { return _is_in_vthread_transition_offset; }
454
455 // Clear all scoped value bindings on error
456 static void clear_scopedValueBindings(oop java_thread);
457
458 // Blocker object responsible for thread parking
459 static oop park_blocker(oop java_thread);
460
461 // Write thread status info to threadStatus field of java.lang.Thread.
462 static void set_thread_status(oop java_thread_oop, JavaThreadStatus status);
463 // Read thread status info from threadStatus field of java.lang.Thread.
464 static JavaThreadStatus get_thread_status(oop java_thread_oop);
465
466 static const char* thread_status_name(oop java_thread_oop);
467
468 // Fill in current stack trace, can cause GC
469 static oop async_get_stack_trace(jobject jthread, TRAPS);
470
471 JFR_ONLY(static u2 jfr_epoch(oop java_thread);)
472 JFR_ONLY(static void set_jfr_epoch(oop java_thread, u2 epoch);)
473 JFR_ONLY(static int jfr_epoch_offset() { CHECK_INIT(_jfr_epoch_offset); })
474
475 // Debugging
476 friend class JavaClasses;
477 };
478
479 // Interface to java.lang.Thread$FieldHolder objects
480
481 class java_lang_Thread_FieldHolder : AllStatic {
482 private:
483 static int _group_offset;
484 static int _priority_offset;
485 static int _stackSize_offset;
486 static int _daemon_offset;
487 static int _thread_status_offset;
488
489 static void compute_offsets();
490
491 public:
492 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
493
494 static oop threadGroup(oop holder);
495
496 static ThreadPriority priority(oop holder);
497 static void set_priority(oop holder, ThreadPriority priority);
498
499 static jlong stackSize(oop holder);
500
501 static bool is_daemon(oop holder);
502 static void set_daemon(oop holder, bool val);
503
504 static void set_thread_status(oop holder, JavaThreadStatus status);
505 static JavaThreadStatus get_thread_status(oop holder);
506
507 friend class JavaClasses;
508 };
509
510 // Interface to java.lang.Thread$Constants objects
511
512 class java_lang_Thread_Constants : AllStatic {
513 private:
514 static int _static_VTHREAD_GROUP_offset;
515 static int _static_NOT_SUPPORTED_CLASSLOADER_offset;
516
517 static void compute_offsets();
518 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
519
520 public:
521 static oop get_VTHREAD_GROUP();
522
523 friend class JavaClasses;
524 };
525
526 // Interface to java.lang.ThreadGroup objects
527
528 class java_lang_ThreadGroup : AllStatic {
529 private:
530 static int _parent_offset;
531 static int _name_offset;
532 static int _maxPriority_offset;
533 static int _daemon_offset;
534
535 static void compute_offsets();
536 public:
537 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
538
539 // parent ThreadGroup
540 static oop parent(oop java_thread_group);
541 // name
542 static const char* name(oop java_thread_group);
543 // maxPriority in group
544 static ThreadPriority maxPriority(oop java_thread_group);
545 // Daemon
546 static bool is_daemon(oop java_thread_group);
547
548 // Debugging
549 friend class JavaClasses;
550 };
551
552
553 // Interface to java.lang.VirtualThread objects
554 #define VTHREAD_INJECTED_FIELDS(macro) \
555 macro(java_lang_VirtualThread, objectWaiter, intptr_signature, false)
556
557 class java_lang_VirtualThread : AllStatic {
558 private:
559 static int static_vthread_scope_offset;
560 static int _carrierThread_offset;
561 static int _continuation_offset;
562 static int _state_offset;
563 static int _next_offset;
564 static int _onWaitingList_offset;
565 static int _notified_offset;
566 static int _interruptible_wait_offset;
567 static int _recheckInterval_offset;
568 static int _timeout_offset;
569 static int _objectWaiter_offset;
570 JFR_ONLY(static int _jfr_epoch_offset;)
571 public:
572 enum {
573 NEW = 0,
574 STARTED = 1,
575 RUNNING = 2,
576 PARKING = 3,
577 PARKED = 4,
578 PINNED = 5,
579 TIMED_PARKING = 6,
580 TIMED_PARKED = 7,
581 TIMED_PINNED = 8,
582 UNPARKED = 9,
583 YIELDING = 10,
584 YIELDED = 11,
585 BLOCKING = 12,
586 BLOCKED = 13,
587 UNBLOCKED = 14,
588 WAITING = 15,
589 WAIT = 16, // waiting in Object.wait
590 TIMED_WAITING = 17,
591 TIMED_WAIT = 18, // waiting in timed-Object.wait
592 TERMINATED = 99,
593 };
594
595 static void compute_offsets();
596 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
597
598 // Testers
599 static bool is_subclass(Klass* klass) {
600 return klass->is_subclass_of(vmClasses::VirtualThread_klass());
601 }
602 static bool is_instance(oop obj);
603
604 static oop vthread_scope();
605 static oop carrier_thread(oop vthread);
606 static oop continuation(oop vthread);
607 static int state(oop vthread);
608 static void set_state(oop vthread, int state);
609 static int cmpxchg_state(oop vthread, int old_state, int new_state);
610 static oop next(oop vthread);
611 static void set_next(oop vthread, oop next_vthread);
612 static bool set_onWaitingList(oop vthread, OopHandle& list_head);
613 static jlong timeout(oop vthread);
614 static void set_timeout(oop vthread, jlong value);
615 static void set_notified(oop vthread, jboolean value);
616 static void set_interruptible_wait(oop vthread, jboolean value);
617 static bool is_preempted(oop vthread);
618 static JavaThreadStatus map_state_to_thread_status(int state);
619
620 static inline ObjectWaiter* objectWaiter(oop vthread);
621 static inline void set_objectWaiter(oop vthread, ObjectWaiter* waiter);
622 static ObjectMonitor* current_pending_monitor(oop vthread);
623 static ObjectMonitor* current_waiting_monitor(oop vthread);
624 };
625
626
627 // Interface to java.lang.Throwable objects
628
629 class java_lang_Throwable: AllStatic {
630 friend class BacktraceBuilder;
631 friend class BacktraceIterator;
632
633 private:
634 // Trace constants
635 enum {
636 trace_methods_offset = 0,
637 trace_bcis_offset = 1,
638 trace_mirrors_offset = 2,
639 trace_names_offset = 3,
640 trace_conts_offset = 4,
641 trace_next_offset = 5,
642 trace_hidden_offset = 6,
643 trace_size = 7,
644 trace_chunk_size = 32
645 };
646
647 static int _backtrace_offset;
648 static int _detailMessage_offset;
649 static int _stackTrace_offset;
650 static int _depth_offset;
651 static int _cause_offset;
652 static int _static_unassigned_stacktrace_offset;
653
654 // StackTrace (programmatic access, new since 1.4)
655 static void clear_stacktrace(oop throwable);
656 // Stacktrace (post JDK 1.7.0 to allow immutability protocol to be followed)
657 static void set_stacktrace(oop throwable, oop st_element_array);
658 static oop unassigned_stacktrace();
659
660 public:
661 // Backtrace
662 static oop backtrace(oop throwable);
663 static void set_backtrace(oop throwable, oop value);
664 static int depth(oop throwable);
665 static void set_depth(oop throwable, int value);
666 // Message
667 static int get_detailMessage_offset() { CHECK_INIT(_detailMessage_offset); }
668 static oop message(oop throwable);
669 static const char* message_as_utf8(oop throwable);
670 static void set_message(oop throwable, oop value);
671
672 static oop cause(oop throwable);
673
674 static void print_stack_element(outputStream *st, Method* method, int bci);
675
676 static void compute_offsets();
677 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
678
679 // Allocate space for backtrace (created but stack trace not filled in)
680 static void allocate_backtrace(Handle throwable, TRAPS);
681 // Fill in current stack trace for throwable with preallocated backtrace (no GC)
682 static void fill_in_stack_trace_of_preallocated_backtrace(Handle throwable);
683 // Fill in current stack trace, can cause GC
684 static void fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS);
685 static void fill_in_stack_trace(Handle throwable, const methodHandle& method = methodHandle());
686
687 // Programmatic access to stack trace
688 static void get_stack_trace_elements(int depth, Handle backtrace, objArrayHandle stack_trace, TRAPS);
689
690 // For recreating class initialization error exceptions.
691 static Handle create_initialization_error(JavaThread* current, Handle throwable);
692
693 // Printing
694 static void print(oop throwable, outputStream* st);
695 static void print_stack_trace(Handle throwable, outputStream* st);
696 static void java_printStackTrace(Handle throwable, TRAPS);
697 // Debugging
698 friend class JavaClasses;
699 // Gets the method and bci of the top frame (TOS). Returns false if this failed.
700 static bool get_top_method_and_bci(oop throwable, Method** method, int* bci);
701 };
702
703
704 // Interface to java.lang.reflect.AccessibleObject objects
705
706 class java_lang_reflect_AccessibleObject: AllStatic {
707 private:
708 // Note that to reduce dependencies on the JDK we compute these
709 // offsets at run-time.
710 static int _override_offset;
711
712 static void compute_offsets();
713
714 public:
715 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
716
717 // Accessors
718 static jboolean override(oop reflect);
719 static void set_override(oop reflect, jboolean value);
720
721 // Debugging
722 friend class JavaClasses;
723 };
724
725
726 // Interface to java.lang.reflect.Method objects
727
728 class java_lang_reflect_Method : public java_lang_reflect_AccessibleObject {
729 private:
730 // Note that to reduce dependencies on the JDK we compute these
731 // offsets at run-time.
732 static int _clazz_offset;
733 static int _name_offset;
734 static int _returnType_offset;
735 static int _parameterTypes_offset;
736 static int _exceptionTypes_offset;
737 static int _slot_offset;
738 static int _modifiers_offset;
739 static int _signature_offset;
740 static int _annotations_offset;
741 static int _parameter_annotations_offset;
742 static int _annotation_default_offset;
743
744 static void compute_offsets();
745 public:
746 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
747
748 // Allocation
749 static Handle create(TRAPS);
750
751 // Accessors
752 static oop clazz(oop reflect);
753 static void set_clazz(oop reflect, oop value);
754
755 static void set_name(oop method, oop value);
756
757 static oop return_type(oop method);
758 static void set_return_type(oop method, oop value);
759
760 static oop parameter_types(oop method);
761 static void set_parameter_types(oop method, oop value);
762
763 static int slot(oop reflect);
764 static void set_slot(oop reflect, int value);
765
766 static void set_exception_types(oop method, oop value);
767 static void set_modifiers(oop method, int value);
768 static void set_signature(oop method, oop value);
769 static void set_annotations(oop method, oop value);
770 static void set_parameter_annotations(oop method, oop value);
771 static void set_annotation_default(oop method, oop value);
772
773 // Debugging
774 friend class JavaClasses;
775 };
776
777
778 // Interface to java.lang.reflect.Constructor objects
779
780 class java_lang_reflect_Constructor : public java_lang_reflect_AccessibleObject {
781 private:
782 // Note that to reduce dependencies on the JDK we compute these
783 // offsets at run-time.
784 static int _clazz_offset;
785 static int _parameterTypes_offset;
786 static int _exceptionTypes_offset;
787 static int _slot_offset;
788 static int _modifiers_offset;
789 static int _signature_offset;
790 static int _annotations_offset;
791 static int _parameter_annotations_offset;
792
793 static void compute_offsets();
794 public:
795 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
796
797 // Allocation
798 static Handle create(TRAPS);
799
800 // Accessors
801 static oop clazz(oop reflect);
802 static void set_clazz(oop reflect, oop value);
803
804 static oop parameter_types(oop constructor);
805 static void set_parameter_types(oop constructor, oop value);
806
807 static int slot(oop reflect);
808 static void set_slot(oop reflect, int value);
809
810 static void set_exception_types(oop constructor, oop value);
811 static void set_modifiers(oop constructor, int value);
812 static void set_signature(oop constructor, oop value);
813 static void set_annotations(oop constructor, oop value);
814 static void set_parameter_annotations(oop method, oop value);
815
816 // Debugging
817 friend class JavaClasses;
818 };
819
820 #if INCLUDE_JFR
821 #define FIELD_INJECTED_FIELDS(macro) \
822 macro(java_lang_reflect_Field, jfr_epoch, int_signature, false)
823 #endif // INCLUDE_JFR
824
825 // Interface to java.lang.reflect.Field objects
826
827 class java_lang_reflect_Field : public java_lang_reflect_AccessibleObject {
828 private:
829 // Note that to reduce dependencies on the JDK we compute these
830 // offsets at run-time.
831 static int _clazz_offset;
832 static int _name_offset;
833 static int _type_offset;
834 static int _slot_offset;
835 static int _modifiers_offset;
836 static int _trusted_final_offset;
837 static int _signature_offset;
838 static int _annotations_offset;
839 JFR_ONLY(static int _jfr_epoch_offset;)
840
841 static void compute_offsets();
842
843 public:
844 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
845
846 // Allocation
847 static Handle create(TRAPS);
848
849 // Accessors
850 static oop clazz(oop reflect);
851 static void set_clazz(oop reflect, oop value);
852
853 static oop name(oop field);
854 static void set_name(oop field, oop value);
855
856 static oop type(oop field);
857 static void set_type(oop field, oop value);
858
859 static int slot(oop reflect);
860 static void set_slot(oop reflect, int value);
861
862 static int modifiers(oop field);
863 static void set_modifiers(oop field, int value);
864
865 static void set_trusted_final(oop field);
866
867 static void set_signature(oop constructor, oop value);
868 static void set_annotations(oop constructor, oop value);
869
870 JFR_ONLY(static u2 epoch(oop field);)
871 JFR_ONLY(static int epoch_offset() { CHECK_INIT(_jfr_epoch_offset); })
872
873 // Debugging
874 friend class JavaClasses;
875 };
876
877 class java_lang_reflect_Parameter {
878 private:
879 // Note that to reduce dependencies on the JDK we compute these
880 // offsets at run-time.
881 static int _name_offset;
882 static int _modifiers_offset;
883 static int _index_offset;
884 static int _executable_offset;
885
886 static void compute_offsets();
887
888 public:
889 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
890
891 // Allocation
892 static Handle create(TRAPS);
893
894 // Accessors
895 static oop name(oop field);
896 static void set_name(oop field, oop value);
897
898 static int index(oop reflect);
899 static void set_index(oop reflect, int value);
900
901 static int modifiers(oop reflect);
902 static void set_modifiers(oop reflect, int value);
903
904 static oop executable(oop constructor);
905 static void set_executable(oop constructor, oop value);
906
907 friend class JavaClasses;
908 };
909
910 #define MODULE_INJECTED_FIELDS(macro) \
911 macro(java_lang_Module, module_entry, intptr_signature, false)
912
913 class java_lang_Module {
914 private:
915 static int _loader_offset;
916 static int _name_offset;
917 static int _module_entry_offset;
918
919 static void compute_offsets();
920
921 public:
922 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
923
924 // Allocation
925 static Handle create(Handle loader, Handle module_name, TRAPS);
926
927 // Testers
928 static bool is_instance(oop obj);
929
930 // Accessors
931 static oop loader(oop module);
932 static void set_loader(oop module, oop value);
933
934 // CDS
935 static int module_entry_offset() { return _module_entry_offset; }
936
937 static oop name(oop module);
938 static void set_name(oop module, oop value);
939
940 static ModuleEntry* module_entry(oop module);
941 static ModuleEntry* module_entry_raw(oop module);
942 static void set_module_entry(oop module, ModuleEntry* module_entry);
943
944 friend class JavaClasses;
945 };
946
947 #define CONSTANTPOOL_INJECTED_FIELDS(macro) \
948 macro(reflect_ConstantPool, vmholder, object_signature, false)
949
950 // Interface to jdk.internal.reflect.ConstantPool objects
951 class reflect_ConstantPool {
952 private:
953 // Note that to reduce dependencies on the JDK we compute these
954 // offsets at run-time. This field is the oop offset for the
955 // actual constant pool, previously called constantPoolOop.
956 static int _vmholder_offset;
957
958 static void compute_offsets();
959
960 public:
961 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
962
963 // Allocation
964 static Handle create(TRAPS);
965
966 // Accessors
967 static void set_cp(oop reflect, ConstantPool* value);
968
969 static ConstantPool* get_cp(oop reflect);
970
971 // Debugging
972 friend class JavaClasses;
973 };
974
975
976 // Interface to java.lang primitive type boxing objects:
977 // - java.lang.Boolean
978 // - java.lang.Character
979 // - java.lang.Float
980 // - java.lang.Double
981 // - java.lang.Byte
982 // - java.lang.Short
983 // - java.lang.Integer
984 // - java.lang.Long
985
986 // This could be separated out into 8 individual classes.
987
988 class java_lang_boxing_object: AllStatic {
989 private:
990 static int _value_offset;
991 static int _long_value_offset;
992
993 static void compute_offsets();
994 static oop initialize_and_allocate(BasicType type, TRAPS);
995 public:
996 // Allocation. Returns a boxed value, or null for invalid type.
997 static oop create(BasicType type, jvalue* value, TRAPS);
998 // Accessors. Returns the basic type being boxed, or T_ILLEGAL for invalid oop.
999 static BasicType get_value(oop box, jvalue* value);
1000 static BasicType set_value(oop box, jvalue* value);
1001 static BasicType basic_type(oop box);
1002 static bool is_instance(oop box) { return basic_type(box) != T_ILLEGAL; }
1003 static bool is_instance(oop box, BasicType type) { return basic_type(box) == type; }
1004 static void print(oop box, outputStream* st) { jvalue value; print(get_value(box, &value), &value, st); }
1005 static void print(BasicType type, jvalue* value, outputStream* st);
1006
1007 static int value_offset(BasicType type) {
1008 return is_double_word_type(type) ? _long_value_offset : _value_offset;
1009 }
1010
1011 static void serialize_offsets(SerializeClosure* f);
1012
1013 // Debugging
1014 friend class JavaClasses;
1015 };
1016
1017
1018
1019 // Interface to java.lang.ref.Reference objects
1020
1021 class java_lang_ref_Reference: AllStatic {
1022 static int _referent_offset;
1023 static int _queue_offset;
1024 static int _next_offset;
1025 static int _discovered_offset;
1026
1027 static bool _offsets_initialized;
1028
1029 public:
1030 // Accessors
1031 static inline oop weak_referent_no_keepalive(oop ref);
1032 static inline oop weak_referent(oop ref);
1033 static inline oop phantom_referent_no_keepalive(oop ref);
1034 static inline oop unknown_referent_no_keepalive(oop ref);
1035 static inline void clear_referent(oop ref);
1036 static inline void clear_referent_raw(oop ref);
1037 static inline HeapWord* referent_addr_raw(oop ref);
1038 static inline oop next(oop ref);
1039 static inline void set_next(oop ref, oop value);
1040 static inline void set_next_raw(oop ref, oop value);
1041 static inline HeapWord* next_addr_raw(oop ref);
1042 static inline oop discovered(oop ref);
1043 static inline void set_discovered(oop ref, oop value);
1044 static inline void set_discovered_raw(oop ref, oop value);
1045 static inline HeapWord* discovered_addr_raw(oop ref);
1046 static bool is_referent_field(oop obj, ptrdiff_t offset);
1047 static inline bool is_final(oop ref);
1048 static inline bool is_phantom(oop ref);
1049 static inline bool is_weak(oop ref);
1050 static inline bool is_soft(oop ref);
1051
1052 static int referent_offset() { CHECK_INIT(_referent_offset); }
1053 static int queue_offset() { CHECK_INIT(_queue_offset); }
1054 static int next_offset() { CHECK_INIT(_next_offset); }
1055 static int discovered_offset() { CHECK_INIT(_discovered_offset); }
1056
1057 static void compute_offsets();
1058 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1059 };
1060
1061
1062 // Interface to java.lang.ref.SoftReference objects
1063
1064 class java_lang_ref_SoftReference: public java_lang_ref_Reference {
1065 static int _timestamp_offset;
1066 static int _static_clock_offset;
1067
1068 public:
1069 // Accessors
1070 static jlong timestamp(oop ref);
1071
1072 // Accessors for statics
1073 static jlong clock();
1074 static void set_clock(jlong value);
1075
1076 static void compute_offsets();
1077 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1078 };
1079
1080 // Interface to java.lang.invoke.MethodHandle objects
1081
1082 class java_lang_invoke_MethodHandle: AllStatic {
1083 friend class JavaClasses;
1084
1085 private:
1086 static int _type_offset; // the MethodType of this MH
1087 static int _form_offset; // the LambdaForm of this MH
1088
1089 static void compute_offsets();
1090
1091 public:
1092 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1093
1094 // Accessors
1095 static oop type(oop mh);
1096 static void set_type(oop mh, oop mtype);
1097
1098 static oop form(oop mh);
1099 static void set_form(oop mh, oop lform);
1100
1101 // Testers
1102 static bool is_subclass(Klass* klass) {
1103 return klass->is_subclass_of(vmClasses::MethodHandle_klass());
1104 }
1105 static bool is_instance(oop obj);
1106
1107 // Accessors for code generation:
1108 static int type_offset() { CHECK_INIT(_type_offset); }
1109 static int form_offset() { CHECK_INIT(_form_offset); }
1110 };
1111
1112 // Interface to java.lang.invoke.DirectMethodHandle objects
1113
1114 class java_lang_invoke_DirectMethodHandle: AllStatic {
1115 friend class JavaClasses;
1116
1117 private:
1118 static int _member_offset; // the MemberName of this DMH
1119
1120 static void compute_offsets();
1121
1122 public:
1123 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1124
1125 // Accessors
1126 static oop member(oop mh);
1127
1128 // Testers
1129 static bool is_subclass(Klass* klass) {
1130 return klass->is_subclass_of(vmClasses::DirectMethodHandle_klass());
1131 }
1132 static bool is_instance(oop obj);
1133
1134 // Accessors for code generation:
1135 static int member_offset() { CHECK_INIT(_member_offset); }
1136 };
1137
1138 // Interface to java.lang.invoke.LambdaForm objects
1139 // (These are a private interface for managing adapter code generation.)
1140
1141 class java_lang_invoke_LambdaForm: AllStatic {
1142 friend class JavaClasses;
1143
1144 private:
1145 static int _vmentry_offset; // type is MemberName
1146
1147 static void compute_offsets();
1148
1149 public:
1150 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1151
1152 // Accessors
1153 static oop vmentry(oop lform);
1154
1155 // Testers
1156 static bool is_subclass(Klass* klass) {
1157 return vmClasses::LambdaForm_klass() != nullptr &&
1158 klass->is_subclass_of(vmClasses::LambdaForm_klass());
1159 }
1160 static bool is_instance(oop obj);
1161
1162 // Accessors for code generation:
1163 static int vmentry_offset() { CHECK_INIT(_vmentry_offset); }
1164 };
1165
1166 // Interface to java.lang.invoke.NativeEntryPoint objects
1167 // (These are a private interface for managing adapter code generation.)
1168
1169 class jdk_internal_foreign_abi_NativeEntryPoint: AllStatic {
1170 friend class JavaClasses;
1171
1172 private:
1173 static int _method_type_offset;
1174 static int _downcall_stub_address_offset;
1175
1176 static void compute_offsets();
1177
1178 public:
1179 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1180
1181 // Accessors
1182 static oop method_type(oop entry);
1183 static jlong downcall_stub_address(oop entry);
1184
1185 // Accessors for code generation:
1186 static int method_type_offset_in_bytes() { return _method_type_offset; }
1187 static int downcall_stub_address_offset_in_bytes() { return _downcall_stub_address_offset; }
1188 };
1189
1190 class jdk_internal_foreign_abi_ABIDescriptor: AllStatic {
1191 friend class JavaClasses;
1192
1193 private:
1194 static int _inputStorage_offset;
1195 static int _outputStorage_offset;
1196 static int _volatileStorage_offset;
1197 static int _stackAlignment_offset;
1198 static int _shadowSpace_offset;
1199 static int _scratch1_offset;
1200 static int _scratch2_offset;
1201
1202 static void compute_offsets();
1203
1204 public:
1205 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1206
1207 // Accessors
1208 static objArrayOop inputStorage(oop entry);
1209 static objArrayOop outputStorage(oop entry);
1210 static objArrayOop volatileStorage(oop entry);
1211 static jint stackAlignment(oop entry);
1212 static jint shadowSpace(oop entry);
1213 static oop scratch1(oop entry);
1214 static oop scratch2(oop entry);
1215 };
1216
1217 class jdk_internal_foreign_abi_VMStorage: AllStatic {
1218 friend class JavaClasses;
1219
1220 private:
1221 static int _type_offset;
1222 static int _indexOrOffset_offset;
1223 static int _segmentMaskOrSize_offset;
1224 static int _debugName_offset;
1225
1226 static void compute_offsets();
1227
1228 public:
1229 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1230
1231 // Accessors
1232 static jbyte type(oop entry);
1233 static jint index_or_offset(oop entry);
1234 static jshort segment_mask_or_size(oop entry);
1235 static oop debugName(oop entry);
1236
1237 // Testers
1238 static bool is_subclass(Klass* klass) {
1239 return vmClasses::VMStorage_klass() != nullptr &&
1240 klass->is_subclass_of(vmClasses::VMStorage_klass());
1241 }
1242 static bool is_instance(oop obj);
1243 };
1244
1245 class jdk_internal_foreign_abi_CallConv: AllStatic {
1246 friend class JavaClasses;
1247
1248 private:
1249 static int _argRegs_offset;
1250 static int _retRegs_offset;
1251
1252 static void compute_offsets();
1253
1254 public:
1255 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1256
1257 // Accessors
1258 static objArrayOop argRegs(oop entry);
1259 static objArrayOop retRegs(oop entry);
1260
1261 // Testers
1262 static bool is_subclass(Klass* klass) {
1263 return vmClasses::CallConv_klass() != nullptr &&
1264 klass->is_subclass_of(vmClasses::CallConv_klass());
1265 }
1266 static bool is_instance(oop obj);
1267 };
1268
1269 // Interface to java.lang.invoke.MemberName objects
1270 // (These are a private interface for Java code to query the class hierarchy.)
1271
1272 #define RESOLVEDMETHOD_INJECTED_FIELDS(macro) \
1273 macro(java_lang_invoke_ResolvedMethodName, vmtarget, intptr_signature, false)
1274
1275 class java_lang_invoke_ResolvedMethodName : AllStatic {
1276 friend class JavaClasses;
1277
1278 static int _vmtarget_offset;
1279 static int _vmholder_offset;
1280
1281 static void compute_offsets();
1282 public:
1283 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1284
1285 static int vmtarget_offset() { CHECK_INIT(_vmtarget_offset); }
1286
1287 static Method* vmtarget(oop resolved_method);
1288 static void set_vmtarget(oop resolved_method, Method* method);
1289
1290 static void set_vmholder(oop resolved_method, oop holder);
1291
1292 // find or create resolved member name
1293 static oop find_resolved_method(const methodHandle& m, TRAPS);
1294
1295 static bool is_instance(oop resolved_method);
1296 };
1297
1298
1299 #define MEMBERNAME_INJECTED_FIELDS(macro) \
1300 macro(java_lang_invoke_MemberName, vmindex, intptr_signature, false)
1301
1302
1303 class java_lang_invoke_MemberName: AllStatic {
1304 friend class JavaClasses;
1305
1306 private:
1307 // From java.lang.invoke.MemberName:
1308 // private Class<?> clazz; // class in which the method is defined
1309 // private String name; // may be null if not yet materialized
1310 // private Object type; // may be null if not yet materialized
1311 // private int flags; // modifier bits; see reflect.Modifier
1312 // private ResolvedMethodName method; // holds VM-specific target value
1313 // private intptr_t vmindex; // member index within class or interface
1314 static int _clazz_offset;
1315 static int _name_offset;
1316 static int _type_offset;
1317 static int _flags_offset;
1318 static int _method_offset;
1319 static int _vmindex_offset;
1320
1321 static void compute_offsets();
1322
1323 public:
1324 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1325 // Accessors
1326 static oop clazz(oop mname);
1327 static void set_clazz(oop mname, oop clazz);
1328
1329 static oop type(oop mname);
1330 static void set_type(oop mname, oop type);
1331
1332 static oop name(oop mname);
1333 static void set_name(oop mname, oop name);
1334
1335 static int flags(oop mname);
1336 static void set_flags(oop mname, int flags);
1337
1338 // Link through ResolvedMethodName field to get Method*
1339 static Method* vmtarget(oop mname);
1340 static void set_method(oop mname, oop method);
1341
1342 static intptr_t vmindex(oop mname);
1343 static void set_vmindex(oop mname, intptr_t index);
1344
1345 // Testers
1346 static bool is_subclass(Klass* klass) {
1347 return klass->is_subclass_of(vmClasses::MemberName_klass());
1348 }
1349 static bool is_instance(oop obj);
1350
1351 static bool is_method(oop obj);
1352
1353 // Relevant integer codes (keep these in synch. with MethodHandleNatives.Constants):
1354 enum {
1355 MN_IS_METHOD = 0x00010000, // method (not constructor)
1356 MN_IS_CONSTRUCTOR = 0x00020000, // constructor
1357 MN_IS_FIELD = 0x00040000, // field
1358 MN_IS_TYPE = 0x00080000, // nested type
1359 MN_CALLER_SENSITIVE = 0x00100000, // @CallerSensitive annotation detected
1360 MN_TRUSTED_FINAL = 0x00200000, // trusted final field
1361 MN_HIDDEN_MEMBER = 0x00400000, // @Hidden annotation detected
1362 MN_REFERENCE_KIND_SHIFT = 24, // refKind
1363 MN_REFERENCE_KIND_MASK = 0x0F000000 >> MN_REFERENCE_KIND_SHIFT,
1364 MN_NESTMATE_CLASS = 0x00000001,
1365 MN_HIDDEN_CLASS = 0x00000002,
1366 MN_STRONG_LOADER_LINK = 0x00000004,
1367 MN_ACCESS_VM_ANNOTATIONS = 0x00000008,
1368 // Lookup modes
1369 MN_MODULE_MODE = 0x00000010,
1370 MN_UNCONDITIONAL_MODE = 0x00000020,
1371 MN_TRUSTED_MODE = -1
1372 };
1373
1374 // Accessors for code generation:
1375 static int clazz_offset() { CHECK_INIT(_clazz_offset); }
1376 static int type_offset() { CHECK_INIT(_type_offset); }
1377 static int flags_offset() { CHECK_INIT(_flags_offset); }
1378 static int method_offset() { CHECK_INIT(_method_offset); }
1379 static int vmindex_offset() { CHECK_INIT(_vmindex_offset); }
1380 };
1381
1382
1383 // Interface to java.lang.invoke.MethodType objects
1384
1385 class java_lang_invoke_MethodType: AllStatic {
1386 friend class JavaClasses;
1387
1388 private:
1389 static int _rtype_offset;
1390 static int _ptypes_offset;
1391
1392 static void compute_offsets();
1393
1394 public:
1395 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1396 // Accessors
1397 static oop rtype(oop mt);
1398 static objArrayOop ptypes(oop mt);
1399
1400 static oop ptype(oop mt, int index);
1401 static int ptype_count(oop mt);
1402
1403 static int ptype_slot_count(oop mt); // extra counts for long/double
1404 static int rtype_slot_count(oop mt); // extra counts for long/double
1405
1406 static Symbol* as_signature(oop mt, bool intern_if_not_found);
1407 static void print_signature(oop mt, outputStream* st);
1408
1409 static bool is_instance(oop obj);
1410
1411 static bool equals(oop mt1, oop mt2);
1412
1413 // Accessors for code generation:
1414 static int rtype_offset() { CHECK_INIT(_rtype_offset); }
1415 static int ptypes_offset() { CHECK_INIT(_ptypes_offset); }
1416 };
1417
1418
1419 // Interface to java.lang.invoke.CallSite objects
1420 #define CALLSITE_INJECTED_FIELDS(macro) \
1421 macro(java_lang_invoke_CallSite, vmdependencies, intptr_signature, false) \
1422 macro(java_lang_invoke_CallSite, last_cleanup, long_signature, false)
1423
1424 class java_lang_invoke_CallSite: AllStatic {
1425 friend class JavaClasses;
1426
1427 private:
1428 static int _target_offset;
1429 static int _vmdependencies_offset;
1430 static int _last_cleanup_offset;
1431
1432 static void compute_offsets();
1433
1434 public:
1435 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1436 // Accessors
1437 static oop target( oop site);
1438 static void set_target( oop site, oop target);
1439 static void set_target_volatile( oop site, oop target);
1440
1441 static DependencyContext vmdependencies(oop call_site);
1442
1443 // Testers
1444 static bool is_subclass(Klass* klass) {
1445 return klass->is_subclass_of(vmClasses::CallSite_klass());
1446 }
1447 static bool is_instance(oop obj);
1448
1449 // Accessors for code generation:
1450 static int target_offset() { CHECK_INIT(_target_offset); }
1451 };
1452
1453 // Interface to java.lang.invoke.ConstantCallSite objects
1454
1455 class java_lang_invoke_ConstantCallSite: AllStatic {
1456 friend class JavaClasses;
1457
1458 private:
1459 static int _is_frozen_offset;
1460
1461 static void compute_offsets();
1462
1463 public:
1464 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1465 // Accessors
1466 static jboolean is_frozen(oop site);
1467
1468 // Testers
1469 static bool is_subclass(Klass* klass) {
1470 return klass->is_subclass_of(vmClasses::ConstantCallSite_klass());
1471 }
1472 static bool is_instance(oop obj);
1473 };
1474
1475 // Interface to java.lang.ClassLoader objects
1476
1477 #define CLASSLOADER_INJECTED_FIELDS(macro) \
1478 macro(java_lang_ClassLoader, loader_data, intptr_signature, false)
1479
1480 class java_lang_ClassLoader : AllStatic {
1481 private:
1482 static int _loader_data_offset;
1483 static int _parent_offset;
1484 static int _parallelCapable_offset;
1485 static int _name_offset;
1486 static int _nameAndId_offset;
1487 static int _unnamedModule_offset;
1488
1489 static void compute_offsets();
1490
1491 public:
1492 // Support for CDS
1493 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1494 static int loader_data_offset() { return _loader_data_offset; }
1495
1496 static ClassLoaderData* loader_data_acquire(oop loader);
1497 static ClassLoaderData* loader_data(oop loader);
1498 static void release_set_loader_data(oop loader, ClassLoaderData* new_data);
1499
1500 static oop parent(oop loader);
1501 static oop parent_no_keepalive(oop loader);
1502 static oop name(oop loader);
1503 static oop nameAndId(oop loader);
1504 static bool isAncestor(oop loader, oop cl);
1505
1506 // Support for parallelCapable field
1507 static bool parallelCapable(oop the_class_mirror);
1508
1509 static bool is_trusted_loader(oop loader);
1510
1511 // Testers
1512 static bool is_subclass(Klass* klass) {
1513 return klass->is_subclass_of(vmClasses::ClassLoader_klass());
1514 }
1515 static bool is_instance(oop obj);
1516
1517 static oop unnamedModule(oop loader);
1518
1519 // Debugging
1520 friend class JavaClasses;
1521 };
1522
1523
1524 // Interface to java.lang.System objects
1525
1526 class java_lang_System : AllStatic {
1527 private:
1528 static int _static_in_offset;
1529 static int _static_out_offset;
1530 static int _static_err_offset;
1531
1532 public:
1533 static int in_offset() { CHECK_INIT(_static_in_offset); }
1534 static int out_offset() { CHECK_INIT(_static_out_offset); }
1535 static int err_offset() { CHECK_INIT(_static_err_offset); }
1536
1537 static void compute_offsets();
1538 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1539
1540 // Debugging
1541 friend class JavaClasses;
1542 };
1543
1544
1545 // Interface to java.lang.StackTraceElement objects
1546
1547 class java_lang_StackTraceElement: AllStatic {
1548 private:
1549 static int _declaringClassObject_offset;
1550 static int _classLoaderName_offset;
1551 static int _moduleName_offset;
1552 static int _moduleVersion_offset;
1553 static int _declaringClass_offset;
1554 static int _methodName_offset;
1555 static int _fileName_offset;
1556 static int _lineNumber_offset;
1557
1558 // Setters
1559 static void set_classLoaderName(oop element, oop value);
1560 static void set_moduleName(oop element, oop value);
1561 static void set_moduleVersion(oop element, oop value);
1562 static void set_declaringClass(oop element, oop value);
1563 static void set_methodName(oop element, oop value);
1564 static void set_fileName(oop element, oop value);
1565 static void set_lineNumber(oop element, int value);
1566 static void set_declaringClassObject(oop element, oop value);
1567
1568 static void decode_file_and_line(Handle java_mirror, InstanceKlass* holder, int version,
1569 const methodHandle& method, int bci,
1570 Symbol*& source, oop& source_file, int& line_number, TRAPS);
1571
1572 public:
1573 // Create an instance of StackTraceElement
1574 static oop create(const methodHandle& method, int bci, TRAPS);
1575
1576 static void fill_in(Handle element, InstanceKlass* holder, const methodHandle& method,
1577 int version, int bci, Symbol* name, TRAPS);
1578
1579 static void compute_offsets();
1580 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1581
1582 // Debugging
1583 friend class JavaClasses;
1584 };
1585
1586
1587 class Backtrace: AllStatic {
1588 public:
1589 // Helper backtrace functions to store bci|version together.
1590 static int merge_bci_and_version(int bci, int version);
1591 static int merge_mid_and_cpref(int mid, int cpref);
1592 static int bci_at(unsigned int merged);
1593 static int version_at(unsigned int merged);
1594 static int mid_at(unsigned int merged);
1595 static int cpref_at(unsigned int merged);
1596 static int get_line_number(Method* method, int bci);
1597 static Symbol* get_source_file_name(InstanceKlass* holder, int version);
1598
1599 // Debugging
1600 friend class JavaClasses;
1601 };
1602
1603 class java_lang_ClassFrameInfo: AllStatic {
1604 private:
1605 static int _classOrMemberName_offset;
1606 static int _flags_offset;
1607
1608 public:
1609 static oop classOrMemberName(oop info);
1610 static int flags(oop info);
1611
1612 // Setters
1613 static void init_class(Handle stackFrame, const methodHandle& m);
1614 static void init_method(Handle stackFrame, const methodHandle& m, TRAPS);
1615
1616 static void compute_offsets();
1617 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1618
1619 // Debugging
1620 friend class JavaClasses;
1621 };
1622
1623 // Interface to java.lang.StackFrameInfo objects
1624
1625 #define STACKFRAMEINFO_INJECTED_FIELDS(macro) \
1626 macro(java_lang_StackFrameInfo, version, short_signature, false)
1627
1628 class java_lang_StackFrameInfo: AllStatic {
1629 private:
1630 static int _type_offset;
1631 static int _name_offset;
1632 static int _bci_offset;
1633 static int _version_offset;
1634 static int _contScope_offset;
1635
1636 public:
1637 // Getters
1638 static oop name(oop info);
1639 static oop type(oop info);
1640 static Method* get_method(oop info);
1641
1642 // Setters
1643 static void set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, oop cont, TRAPS);
1644 static void set_name(oop info, oop value);
1645 static void set_type(oop info, oop value);
1646 static void set_bci(oop info, int value);
1647
1648 static void set_version(oop info, short value);
1649 static void set_contScope(oop info, oop value);
1650
1651 static void compute_offsets();
1652 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1653
1654 static void to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS);
1655
1656 // Debugging
1657 friend class JavaClasses;
1658 };
1659
1660 class java_lang_LiveStackFrameInfo: AllStatic {
1661 private:
1662 static int _monitors_offset;
1663 static int _locals_offset;
1664 static int _operands_offset;
1665 static int _mode_offset;
1666
1667 public:
1668 static void set_monitors(oop info, oop value);
1669 static void set_locals(oop info, oop value);
1670 static void set_operands(oop info, oop value);
1671 static void set_mode(oop info, int value);
1672
1673 static void compute_offsets();
1674 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1675
1676 // Debugging
1677 friend class JavaClasses;
1678 };
1679
1680 // Interface to java.lang.reflect.RecordComponent objects
1681
1682 class java_lang_reflect_RecordComponent: AllStatic {
1683 private:
1684 static int _clazz_offset;
1685 static int _name_offset;
1686 static int _type_offset;
1687 static int _accessor_offset;
1688 static int _signature_offset;
1689 static int _annotations_offset;
1690 static int _typeAnnotations_offset;
1691
1692 // Setters
1693 static void set_clazz(oop element, oop value);
1694 static void set_name(oop element, oop value);
1695 static void set_type(oop element, oop value);
1696 static void set_accessor(oop element, oop value);
1697 static void set_signature(oop element, oop value);
1698 static void set_annotations(oop element, oop value);
1699 static void set_typeAnnotations(oop element, oop value);
1700
1701 public:
1702 // Create an instance of RecordComponent
1703 static oop create(InstanceKlass* holder, RecordComponent* component, TRAPS);
1704
1705 static void compute_offsets();
1706 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1707
1708 // Debugging
1709 friend class JavaClasses;
1710 };
1711
1712
1713 // Interface to java.lang.AssertionStatusDirectives objects
1714
1715 class java_lang_AssertionStatusDirectives: AllStatic {
1716 private:
1717 static int _classes_offset;
1718 static int _classEnabled_offset;
1719 static int _packages_offset;
1720 static int _packageEnabled_offset;
1721 static int _deflt_offset;
1722
1723 public:
1724 // Setters
1725 static void set_classes(oop obj, oop val);
1726 static void set_classEnabled(oop obj, oop val);
1727 static void set_packages(oop obj, oop val);
1728 static void set_packageEnabled(oop obj, oop val);
1729 static void set_deflt(oop obj, bool val);
1730
1731 static void compute_offsets();
1732 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1733
1734 // Debugging
1735 friend class JavaClasses;
1736 };
1737
1738
1739 class java_util_concurrent_locks_AbstractOwnableSynchronizer : AllStatic {
1740 private:
1741 static int _owner_offset;
1742 public:
1743 static void compute_offsets();
1744 static oop get_owner_threadObj(oop obj);
1745 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1746 };
1747
1748 // Interface to jdk.internal.misc.UnsafeConsants
1749
1750 class jdk_internal_misc_UnsafeConstants : AllStatic {
1751 public:
1752 static void set_unsafe_constants();
1753 static void compute_offsets() { }
1754 static void serialize_offsets(SerializeClosure* f) { }
1755 };
1756
1757 // Interface to jdk.internal.vm.vector.VectorSupport.VectorPayload objects
1758
1759 class vector_VectorPayload : AllStatic {
1760 private:
1761 static int _payload_offset;
1762 public:
1763 static void set_payload(oop o, oop val);
1764
1765 static void compute_offsets();
1766 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1767
1768 // Testers
1769 static bool is_subclass(Klass* klass) {
1770 return klass->is_subclass_of(vmClasses::vector_VectorPayload_klass());
1771 }
1772 static bool is_instance(oop obj);
1773 };
1774
1775 class java_lang_Boolean : AllStatic {
1776 private:
1777 static int _static_TRUE_offset;
1778 static int _static_FALSE_offset;
1779 public:
1780 static Symbol* symbol();
1781 static void compute_offsets(InstanceKlass* k);
1782 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1783 };
1784
1785 class java_lang_Integer_IntegerCache : AllStatic {
1786 private:
1787 static int _static_cache_offset;
1788 public:
1789 static Symbol* symbol();
1790 static void compute_offsets(InstanceKlass* k);
1791 static objArrayOop cache(InstanceKlass *k);
1792 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1793 };
1794
1795 class java_lang_Long_LongCache : AllStatic {
1796 private:
1797 static int _static_cache_offset;
1798 public:
1799 static Symbol* symbol();
1800 static void compute_offsets(InstanceKlass* k);
1801 static objArrayOop cache(InstanceKlass *k);
1802 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1803 };
1804
1805 class java_lang_Character_CharacterCache : AllStatic {
1806 private:
1807 static int _static_cache_offset;
1808 public:
1809 static Symbol* symbol();
1810 static void compute_offsets(InstanceKlass* k);
1811 static objArrayOop cache(InstanceKlass *k);
1812 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1813 };
1814
1815 class java_lang_Short_ShortCache : AllStatic {
1816 private:
1817 static int _static_cache_offset;
1818 public:
1819 static Symbol* symbol();
1820 static void compute_offsets(InstanceKlass* k);
1821 static objArrayOop cache(InstanceKlass *k);
1822 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1823 };
1824
1825 class java_lang_Byte_ByteCache : AllStatic {
1826 private:
1827 static int _static_cache_offset;
1828 public:
1829 static Symbol* symbol();
1830 static void compute_offsets(InstanceKlass* k);
1831 static objArrayOop cache(InstanceKlass *k);
1832 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1833 };
1834
1835
1836 // Interface to java.lang.InternalError objects
1837
1838 #define INTERNALERROR_INJECTED_FIELDS(macro) \
1839 macro(java_lang_InternalError, during_unsafe_access, bool_signature, false)
1840
1841 class java_lang_InternalError : AllStatic {
1842 private:
1843 static int _during_unsafe_access_offset;
1844 public:
1845 static jboolean during_unsafe_access(oop internal_error);
1846 static void set_during_unsafe_access(oop internal_error);
1847 static void compute_offsets();
1848 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1849 };
1850
1851 // Use to declare fields that need to be injected into Java classes
1852 // for the JVM to use. The name_index and signature_index are
1853 // declared in vmSymbols. The may_be_java flag is used to declare
1854 // fields that might already exist in Java but should be injected if
1855 // they don't. Otherwise the field is unconditionally injected and
1856 // the JVM uses the injected one. This is to ensure that name
1857 // collisions don't occur. In general may_be_java should be false
1858 // unless there's a good reason.
1859
1860 class InjectedField {
1861 public:
1862 const vmClassID klass_id;
1863 const vmSymbolID name_index;
1864 const vmSymbolID signature_index;
1865 const bool may_be_java;
1866
1867
1868 InstanceKlass* klass() const { return vmClasses::klass_at(klass_id); }
1869 Symbol* name() const { return lookup_symbol(name_index); }
1870 Symbol* signature() const { return lookup_symbol(signature_index); }
1871
1872 int compute_offset();
1873
1874 // Find the Symbol for this index
1875 static Symbol* lookup_symbol(vmSymbolID symbol_index) {
1876 return Symbol::vm_symbol_at(symbol_index);
1877 }
1878 };
1879
1880
1881 // Interface to hard-coded offset checking
1882
1883 enum class InjectedFieldID : int;
1884
1885 class JavaClasses : AllStatic {
1886 private:
1887
1888 static InjectedField _injected_fields[];
1889
1890 static bool check_offset(const char *klass_name, int offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1891 public:
1892
1893 static int compute_injected_offset(InjectedFieldID id);
1894
1895 static void compute_offsets();
1896 static void check_offsets() PRODUCT_RETURN;
1897 static void serialize_offsets(SerializeClosure* soc) NOT_CDS_RETURN;
1898 static InjectedField* get_injected(Symbol* class_name, int* field_count);
1899 static bool is_supported_for_archiving(oop obj) NOT_CDS_JAVA_HEAP_RETURN_(false);
1900
1901 static void compute_offset(int &dest_offset,
1902 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol,
1903 bool is_static = false);
1904 static void compute_offset(int& dest_offset, InstanceKlass* ik,
1905 const char* name_string, Symbol* signature_symbol,
1906 bool is_static = false);
1907 };
1908
1909 #undef CHECK_INIT
1910
1911 #endif // SHARE_CLASSFILE_JAVACLASSES_HPP
--- EOF ---