1 /*
2 * Copyright (c) 1997, 2024, 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, protection_domain, object_signature, false) \
232 macro(java_lang_Class, source_file, object_signature, false) \
233 macro(java_lang_Class, init_lock, object_signature, false)
234
235 class java_lang_Class : AllStatic {
236 friend class VMStructs;
237 friend class JVMCIVMStructs;
238
239 private:
240
241 // The fake offsets are added by the class loader when java.lang.Class is loaded
242
243 static int _klass_offset;
244 static int _array_klass_offset;
245
246 static int _oop_size_offset;
247 static int _static_oop_field_count_offset;
248
249 static int _protection_domain_offset;
250 static int _init_lock_offset;
251 static int _signers_offset;
252 static int _class_loader_offset;
253 static int _module_offset;
254 static int _component_mirror_offset;
255 static int _name_offset;
256 static int _source_file_offset;
257 static int _classData_offset;
258 static int _classRedefinedCount_offset;
259 static int _reflectionData_offset;
260
261 static bool _offsets_computed;
262
263 static GrowableArray<Klass*>* _fixup_mirror_list;
264 static GrowableArray<Klass*>* _fixup_module_field_list;
265
266 static void set_init_lock(oop java_class, oop init_lock);
267 static void set_protection_domain(oop java_class, oop protection_domain);
268 static void set_class_loader(oop java_class, oop class_loader);
269 static void set_component_mirror(oop java_class, oop comp_mirror);
270 static void initialize_mirror_fields(Klass* k, Handle mirror, Handle protection_domain,
271 Handle classData, TRAPS);
272 static void set_mirror_module_field(JavaThread* current, Klass* K, Handle mirror, Handle module);
273 public:
274 static void allocate_fixup_lists();
275 static void compute_offsets();
276
277 // Instance creation
278 static void allocate_mirror(Klass* k, bool is_scratch, Handle protection_domain, Handle classData,
279 Handle& mirror, Handle& comp_mirror, TRAPS); // returns mirror and comp_mirror
280 static void create_mirror(Klass* k, Handle class_loader, Handle module,
281 Handle protection_domain, Handle classData, TRAPS);
282 static void fixup_mirror(Klass* k, TRAPS);
283 static oop create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS);
284
285 // Archiving
286 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
287 static void create_scratch_mirror(Klass* k, TRAPS) NOT_CDS_JAVA_HEAP_RETURN;
288 static bool restore_archived_mirror(Klass *k, Handle class_loader, Handle module,
289 Handle protection_domain,
290 TRAPS) NOT_CDS_JAVA_HEAP_RETURN_(false);
291
292 static void fixup_module_field(Klass* k, Handle module);
293
294 // Conversion
295 static Klass* as_Klass(oop java_class);
296 static void set_klass(oop java_class, Klass* klass);
297 static BasicType as_BasicType(oop java_class, Klass** reference_klass = nullptr);
298 static Symbol* as_signature(oop java_class, bool intern_if_not_found);
299 static void print_signature(oop java_class, outputStream *st);
300 static const char* as_external_name(oop java_class);
301 // Testing
302 static bool is_instance(oop obj);
303
304 static bool is_primitive(oop java_class);
305 static BasicType primitive_type(oop java_class);
306 static oop primitive_mirror(BasicType t);
307 // JVM_NewArray support
308 static Klass* array_klass_acquire(oop java_class);
309 static void release_set_array_klass(oop java_class, Klass* klass);
310 // compiler support for class operations
311 static int klass_offset() { CHECK_INIT(_klass_offset); }
312 static int array_klass_offset() { CHECK_INIT(_array_klass_offset); }
313 // Support for classRedefinedCount field
314 static int classRedefinedCount(oop the_class_mirror);
315 static void set_classRedefinedCount(oop the_class_mirror, int value);
316
317 // Support for embedded per-class oops
318 static oop protection_domain(oop java_class);
319 static oop init_lock(oop java_class);
320 static void clear_init_lock(oop java_class) {
321 set_init_lock(java_class, nullptr);
322 }
323 static oop component_mirror(oop java_class);
324 static objArrayOop signers(oop java_class);
325 static oop class_data(oop java_class);
326 static void set_class_data(oop java_class, oop classData);
327 static void set_reflection_data(oop java_class, oop reflection_data);
328
329 static int component_mirror_offset() { return _component_mirror_offset; }
330
331 static oop class_loader(oop java_class);
332 static void set_module(oop java_class, oop module);
333 static oop module(oop java_class);
334
335 static oop name(Handle java_class, TRAPS);
336
337 static oop source_file(oop java_class);
338 static void set_source_file(oop java_class, oop source_file);
339
340 static size_t oop_size(oop java_class);
341 static void set_oop_size(HeapWord* java_class, size_t size);
342 static int static_oop_field_count(oop java_class);
343 static void set_static_oop_field_count(oop java_class, int size);
344
345 static GrowableArray<Klass*>* fixup_mirror_list() {
346 return _fixup_mirror_list;
347 }
348 static void set_fixup_mirror_list(GrowableArray<Klass*>* v) {
349 _fixup_mirror_list = v;
350 }
351
352 static GrowableArray<Klass*>* fixup_module_field_list() {
353 return _fixup_module_field_list;
354 }
355 static void set_fixup_module_field_list(GrowableArray<Klass*>* v) {
356 _fixup_module_field_list = v;
357 }
358
359 // Debugging
360 friend class JavaClasses;
361 };
362
363 // Interface to java.lang.Thread objects
364
365 #define THREAD_INJECTED_FIELDS(macro) \
366 macro(java_lang_Thread, jvmti_thread_state, intptr_signature, false) \
367 macro(java_lang_Thread, jvmti_VTMS_transition_disable_count, int_signature, false) \
368 macro(java_lang_Thread, jvmti_is_in_VTMS_transition, bool_signature, false) \
369 JFR_ONLY(macro(java_lang_Thread, jfr_epoch, short_signature, false))
370
371 class java_lang_Thread : AllStatic {
372 friend class java_lang_VirtualThread;
373 friend class JVMCIVMStructs;
374 private:
375 // Note that for this class the layout changed between JDK1.2 and JDK1.3,
376 // so we compute the offsets at startup rather than hard-wiring them.
377 static int _holder_offset;
378 static int _name_offset;
379 static int _contextClassLoader_offset;
380 static int _eetop_offset;
381 static int _jvmti_thread_state_offset;
382 static int _jvmti_VTMS_transition_disable_count_offset;
383 static int _jvmti_is_in_VTMS_transition_offset;
384 static int _interrupted_offset;
385 static int _interruptLock_offset;
386 static int _tid_offset;
387 static int _continuation_offset;
388 static int _park_blocker_offset;
389 static int _scopedValueBindings_offset;
390 JFR_ONLY(static int _jfr_epoch_offset;)
391
392 static void compute_offsets();
393
394 public:
395 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
396
397 // Returns the JavaThread associated with the thread obj
398 static JavaThread* thread(oop java_thread);
399 static JavaThread* thread_acquire(oop java_thread);
400 // Set JavaThread for instance
401 static void set_thread(oop java_thread, JavaThread* thread);
402 static void release_set_thread(oop java_thread, JavaThread* thread);
403 // FieldHolder
404 static oop holder(oop java_thread);
405 // interruptLock
406 static oop interrupt_lock(oop java_thread);
407 // Interrupted status
408 static bool interrupted(oop java_thread);
409 static void set_interrupted(oop java_thread, bool val);
410 // Name
411 static oop name(oop java_thread);
412 static void set_name(oop java_thread, oop name);
413 // Priority
414 static ThreadPriority priority(oop java_thread);
415 static void set_priority(oop java_thread, ThreadPriority priority);
416 // Thread group
417 static oop threadGroup(oop java_thread);
418 // Alive (NOTE: this is not really a field, but provides the correct
419 // definition without doing a Java call)
420 static bool is_alive(oop java_thread);
421 // Daemon
422 static bool is_daemon(oop java_thread);
423 static void set_daemon(oop java_thread);
424 // Context ClassLoader
425 static oop context_class_loader(oop java_thread);
426 // Stack size hint
427 static jlong stackSize(oop java_thread);
428 // Thread ID
429 static int64_t thread_id(oop java_thread);
430 static ByteSize thread_id_offset();
431 // Continuation
432 static inline oop continuation(oop java_thread);
433
434 static JvmtiThreadState* jvmti_thread_state(oop java_thread);
435 static void set_jvmti_thread_state(oop java_thread, JvmtiThreadState* state);
436 static int VTMS_transition_disable_count(oop java_thread);
437 static void inc_VTMS_transition_disable_count(oop java_thread);
438 static void dec_VTMS_transition_disable_count(oop java_thread);
439 static bool is_in_VTMS_transition(oop java_thread);
440 static void set_is_in_VTMS_transition(oop java_thread, bool val);
441 static int is_in_VTMS_transition_offset();
442
443 // Clear all scoped value bindings on error
444 static void clear_scopedValueBindings(oop java_thread);
445
446 // Blocker object responsible for thread parking
447 static oop park_blocker(oop java_thread);
448
449 // Write thread status info to threadStatus field of java.lang.Thread.
450 static void set_thread_status(oop java_thread_oop, JavaThreadStatus status);
451 // Read thread status info from threadStatus field of java.lang.Thread.
452 static JavaThreadStatus get_thread_status(oop java_thread_oop);
453
454 static const char* thread_status_name(oop java_thread_oop);
455
456 // Fill in current stack trace, can cause GC
457 static oop async_get_stack_trace(oop java_thread, TRAPS);
458
459 JFR_ONLY(static u2 jfr_epoch(oop java_thread);)
460 JFR_ONLY(static void set_jfr_epoch(oop java_thread, u2 epoch);)
461 JFR_ONLY(static int jfr_epoch_offset() { CHECK_INIT(_jfr_epoch_offset); })
462
463 // Debugging
464 friend class JavaClasses;
465 };
466
467 // Interface to java.lang.Thread$FieldHolder objects
468
469 class java_lang_Thread_FieldHolder : AllStatic {
470 private:
471 static int _group_offset;
472 static int _priority_offset;
473 static int _stackSize_offset;
474 static int _daemon_offset;
475 static int _thread_status_offset;
476
477 static void compute_offsets();
478
479 public:
480 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
481
482 static oop threadGroup(oop holder);
483
484 static ThreadPriority priority(oop holder);
485 static void set_priority(oop holder, ThreadPriority priority);
486
487 static jlong stackSize(oop holder);
488
489 static bool is_daemon(oop holder);
490 static void set_daemon(oop holder, bool val);
491
492 static void set_thread_status(oop holder, JavaThreadStatus status);
493 static JavaThreadStatus get_thread_status(oop holder);
494
495 friend class JavaClasses;
496 };
497
498 // Interface to java.lang.Thread$Constants objects
499
500 class java_lang_Thread_Constants : AllStatic {
501 private:
502 static int _static_VTHREAD_GROUP_offset;
503 static int _static_NOT_SUPPORTED_CLASSLOADER_offset;
504
505 static void compute_offsets();
506 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
507
508 public:
509 static oop get_VTHREAD_GROUP();
510
511 friend class JavaClasses;
512 };
513
514 // Interface to java.lang.ThreadGroup objects
515
516 class java_lang_ThreadGroup : AllStatic {
517 private:
518 static int _parent_offset;
519 static int _name_offset;
520 static int _maxPriority_offset;
521 static int _daemon_offset;
522
523 static void compute_offsets();
524 public:
525 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
526
527 // parent ThreadGroup
528 static oop parent(oop java_thread_group);
529 // name
530 static const char* name(oop java_thread_group);
531 // maxPriority in group
532 static ThreadPriority maxPriority(oop java_thread_group);
533 // Daemon
534 static bool is_daemon(oop java_thread_group);
535
536 // Debugging
537 friend class JavaClasses;
538 };
539
540
541 // Interface to java.lang.VirtualThread objects
542 #define VTHREAD_INJECTED_FIELDS(macro) \
543 macro(java_lang_VirtualThread, objectWaiter, intptr_signature, false)
544
545 class java_lang_VirtualThread : AllStatic {
546 private:
547 static int static_vthread_scope_offset;
548 static int _carrierThread_offset;
549 static int _continuation_offset;
550 static int _state_offset;
551 static int _next_offset;
552 static int _onWaitingList_offset;
553 static int _notified_offset;
554 static int _recheckInterval_offset;
555 static int _timeout_offset;
556 static int _objectWaiter_offset;
557 JFR_ONLY(static int _jfr_epoch_offset;)
558 public:
559 enum {
560 NEW = 0,
561 STARTED = 1,
562 RUNNING = 2,
563 PARKING = 3,
564 PARKED = 4,
565 PINNED = 5,
566 TIMED_PARKING = 6,
567 TIMED_PARKED = 7,
568 TIMED_PINNED = 8,
569 UNPARKED = 9,
570 YIELDING = 10,
571 YIELDED = 11,
572 BLOCKING = 12,
573 BLOCKED = 13,
574 UNBLOCKED = 14,
575 WAITING = 15,
576 WAIT = 16, // waiting in Object.wait
577 TIMED_WAITING = 17,
578 TIMED_WAIT = 18, // waiting in timed-Object.wait
579 TERMINATED = 99,
580
581 // additional state bits
582 SUSPENDED = 1 << 8, // suspended when unmounted
583 };
584
585 static void compute_offsets();
586 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
587
588 // Testers
589 static bool is_subclass(Klass* klass) {
590 return klass->is_subclass_of(vmClasses::VirtualThread_klass());
591 }
592 static bool is_instance(oop obj);
593
594 static oop vthread_scope();
595 static oop carrier_thread(oop vthread);
596 static oop continuation(oop vthread);
597 static int state(oop vthread);
598 static void set_state(oop vthread, int state);
599 static int cmpxchg_state(oop vthread, int old_state, int new_state);
600 static oop next(oop vthread);
601 static void set_next(oop vthread, oop next_vthread);
602 static bool set_onWaitingList(oop vthread, OopHandle& list_head);
603 static jlong timeout(oop vthread);
604 static void set_timeout(oop vthread, jlong value);
605 static void set_notified(oop vthread, jboolean value);
606 static bool is_preempted(oop vthread);
607 static JavaThreadStatus map_state_to_thread_status(int state);
608
609 static inline ObjectWaiter* objectWaiter(oop vthread);
610 static inline void set_objectWaiter(oop vthread, ObjectWaiter* waiter);
611 static ObjectMonitor* current_pending_monitor(oop vthread);
612 static ObjectMonitor* current_waiting_monitor(oop vthread);
613 };
614
615
616 // Interface to java.lang.Throwable objects
617
618 class java_lang_Throwable: AllStatic {
619 friend class BacktraceBuilder;
620 friend class BacktraceIterator;
621
622 private:
623 // Trace constants
624 enum {
625 trace_methods_offset = 0,
626 trace_bcis_offset = 1,
627 trace_mirrors_offset = 2,
628 trace_names_offset = 3,
629 trace_conts_offset = 4,
630 trace_next_offset = 5,
631 trace_hidden_offset = 6,
632 trace_size = 7,
633 trace_chunk_size = 32
634 };
635
636 static int _backtrace_offset;
637 static int _detailMessage_offset;
638 static int _stackTrace_offset;
639 static int _depth_offset;
640 static int _cause_offset;
641 static int _static_unassigned_stacktrace_offset;
642
643 // StackTrace (programmatic access, new since 1.4)
644 static void clear_stacktrace(oop throwable);
645 // Stacktrace (post JDK 1.7.0 to allow immutability protocol to be followed)
646 static void set_stacktrace(oop throwable, oop st_element_array);
647 static oop unassigned_stacktrace();
648
649 public:
650 // Backtrace
651 static oop backtrace(oop throwable);
652 static void set_backtrace(oop throwable, oop value);
653 static int depth(oop throwable);
654 static void set_depth(oop throwable, int value);
655 // Message
656 static int get_detailMessage_offset() { CHECK_INIT(_detailMessage_offset); }
657 static oop message(oop throwable);
658 static const char* message_as_utf8(oop throwable);
659 static void set_message(oop throwable, oop value);
660
661 static oop cause(oop throwable);
662
663 static void print_stack_element(outputStream *st, Method* method, int bci);
664
665 static void compute_offsets();
666 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
667
668 // Allocate space for backtrace (created but stack trace not filled in)
669 static void allocate_backtrace(Handle throwable, TRAPS);
670 // Fill in current stack trace for throwable with preallocated backtrace (no GC)
671 static void fill_in_stack_trace_of_preallocated_backtrace(Handle throwable);
672 // Fill in current stack trace, can cause GC
673 static void fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS);
674 static void fill_in_stack_trace(Handle throwable, const methodHandle& method = methodHandle());
675
676 // Programmatic access to stack trace
677 static void get_stack_trace_elements(int depth, Handle backtrace, objArrayHandle stack_trace, TRAPS);
678
679 // For recreating class initialization error exceptions.
680 static Handle create_initialization_error(JavaThread* current, Handle throwable);
681
682 // Printing
683 static void print(oop throwable, outputStream* st);
684 static void print_stack_trace(Handle throwable, outputStream* st);
685 static void java_printStackTrace(Handle throwable, TRAPS);
686 // Debugging
687 friend class JavaClasses;
688 // Gets the method and bci of the top frame (TOS). Returns false if this failed.
689 static bool get_top_method_and_bci(oop throwable, Method** method, int* bci);
690 };
691
692
693 // Interface to java.lang.reflect.AccessibleObject objects
694
695 class java_lang_reflect_AccessibleObject: AllStatic {
696 private:
697 // Note that to reduce dependencies on the JDK we compute these
698 // offsets at run-time.
699 static int _override_offset;
700
701 static void compute_offsets();
702
703 public:
704 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
705
706 // Accessors
707 static jboolean override(oop reflect);
708 static void set_override(oop reflect, jboolean value);
709
710 // Debugging
711 friend class JavaClasses;
712 };
713
714
715 // Interface to java.lang.reflect.Method objects
716
717 class java_lang_reflect_Method : public java_lang_reflect_AccessibleObject {
718 private:
719 // Note that to reduce dependencies on the JDK we compute these
720 // offsets at run-time.
721 static int _clazz_offset;
722 static int _name_offset;
723 static int _returnType_offset;
724 static int _parameterTypes_offset;
725 static int _exceptionTypes_offset;
726 static int _slot_offset;
727 static int _modifiers_offset;
728 static int _signature_offset;
729 static int _annotations_offset;
730 static int _parameter_annotations_offset;
731 static int _annotation_default_offset;
732
733 static void compute_offsets();
734 public:
735 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
736
737 // Allocation
738 static Handle create(TRAPS);
739
740 // Accessors
741 static oop clazz(oop reflect);
742 static void set_clazz(oop reflect, oop value);
743
744 static void set_name(oop method, oop value);
745
746 static oop return_type(oop method);
747 static void set_return_type(oop method, oop value);
748
749 static oop parameter_types(oop method);
750 static void set_parameter_types(oop method, oop value);
751
752 static int slot(oop reflect);
753 static void set_slot(oop reflect, int value);
754
755 static void set_exception_types(oop method, oop value);
756 static void set_modifiers(oop method, int value);
757 static void set_signature(oop method, oop value);
758 static void set_annotations(oop method, oop value);
759 static void set_parameter_annotations(oop method, oop value);
760 static void set_annotation_default(oop method, oop value);
761
762 // Debugging
763 friend class JavaClasses;
764 };
765
766
767 // Interface to java.lang.reflect.Constructor objects
768
769 class java_lang_reflect_Constructor : public java_lang_reflect_AccessibleObject {
770 private:
771 // Note that to reduce dependencies on the JDK we compute these
772 // offsets at run-time.
773 static int _clazz_offset;
774 static int _parameterTypes_offset;
775 static int _exceptionTypes_offset;
776 static int _slot_offset;
777 static int _modifiers_offset;
778 static int _signature_offset;
779 static int _annotations_offset;
780 static int _parameter_annotations_offset;
781
782 static void compute_offsets();
783 public:
784 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
785
786 // Allocation
787 static Handle create(TRAPS);
788
789 // Accessors
790 static oop clazz(oop reflect);
791 static void set_clazz(oop reflect, oop value);
792
793 static oop parameter_types(oop constructor);
794 static void set_parameter_types(oop constructor, oop value);
795
796 static int slot(oop reflect);
797 static void set_slot(oop reflect, int value);
798
799 static void set_exception_types(oop constructor, oop value);
800 static void set_modifiers(oop constructor, int value);
801 static void set_signature(oop constructor, oop value);
802 static void set_annotations(oop constructor, oop value);
803 static void set_parameter_annotations(oop method, oop value);
804
805 // Debugging
806 friend class JavaClasses;
807 };
808
809
810 // Interface to java.lang.reflect.Field objects
811
812 class java_lang_reflect_Field : public java_lang_reflect_AccessibleObject {
813 private:
814 // Note that to reduce dependencies on the JDK we compute these
815 // offsets at run-time.
816 static int _clazz_offset;
817 static int _name_offset;
818 static int _type_offset;
819 static int _slot_offset;
820 static int _modifiers_offset;
821 static int _trusted_final_offset;
822 static int _signature_offset;
823 static int _annotations_offset;
824
825 static void compute_offsets();
826
827 public:
828 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
829
830 // Allocation
831 static Handle create(TRAPS);
832
833 // Accessors
834 static oop clazz(oop reflect);
835 static void set_clazz(oop reflect, oop value);
836
837 static oop name(oop field);
838 static void set_name(oop field, oop value);
839
840 static oop type(oop field);
841 static void set_type(oop field, oop value);
842
843 static int slot(oop reflect);
844 static void set_slot(oop reflect, int value);
845
846 static int modifiers(oop field);
847 static void set_modifiers(oop field, int value);
848
849 static void set_trusted_final(oop field);
850
851 static void set_signature(oop constructor, oop value);
852 static void set_annotations(oop constructor, oop value);
853
854 // Debugging
855 friend class JavaClasses;
856 };
857
858 class java_lang_reflect_Parameter {
859 private:
860 // Note that to reduce dependencies on the JDK we compute these
861 // offsets at run-time.
862 static int _name_offset;
863 static int _modifiers_offset;
864 static int _index_offset;
865 static int _executable_offset;
866
867 static void compute_offsets();
868
869 public:
870 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
871
872 // Allocation
873 static Handle create(TRAPS);
874
875 // Accessors
876 static oop name(oop field);
877 static void set_name(oop field, oop value);
878
879 static int index(oop reflect);
880 static void set_index(oop reflect, int value);
881
882 static int modifiers(oop reflect);
883 static void set_modifiers(oop reflect, int value);
884
885 static oop executable(oop constructor);
886 static void set_executable(oop constructor, oop value);
887
888 friend class JavaClasses;
889 };
890
891 #define MODULE_INJECTED_FIELDS(macro) \
892 macro(java_lang_Module, module_entry, intptr_signature, false)
893
894 class java_lang_Module {
895 private:
896 static int _loader_offset;
897 static int _name_offset;
898 static int _module_entry_offset;
899
900 static void compute_offsets();
901
902 public:
903 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
904
905 // Allocation
906 static Handle create(Handle loader, Handle module_name, TRAPS);
907
908 // Testers
909 static bool is_instance(oop obj);
910
911 // Accessors
912 static oop loader(oop module);
913 static void set_loader(oop module, oop value);
914
915 // CDS
916 static int module_entry_offset() { return _module_entry_offset; }
917
918 static oop name(oop module);
919 static void set_name(oop module, oop value);
920
921 static ModuleEntry* module_entry(oop module);
922 static ModuleEntry* module_entry_raw(oop module);
923 static void set_module_entry(oop module, ModuleEntry* module_entry);
924
925 friend class JavaClasses;
926 };
927
928 // Interface to jdk.internal.reflect.ConstantPool objects
929 class reflect_ConstantPool {
930 private:
931 // Note that to reduce dependencies on the JDK we compute these
932 // offsets at run-time.
933 static int _oop_offset;
934
935 static void compute_offsets();
936
937 public:
938 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
939
940 // Allocation
941 static Handle create(TRAPS);
942
943 // Accessors
944 static void set_cp(oop reflect, ConstantPool* value);
945 static int oop_offset() { CHECK_INIT(_oop_offset); }
946
947 static ConstantPool* get_cp(oop reflect);
948
949 // Debugging
950 friend class JavaClasses;
951 };
952
953
954 // Interface to java.lang primitive type boxing objects:
955 // - java.lang.Boolean
956 // - java.lang.Character
957 // - java.lang.Float
958 // - java.lang.Double
959 // - java.lang.Byte
960 // - java.lang.Short
961 // - java.lang.Integer
962 // - java.lang.Long
963
964 // This could be separated out into 8 individual classes.
965
966 class java_lang_boxing_object: AllStatic {
967 private:
968 static int _value_offset;
969 static int _long_value_offset;
970
971 static void compute_offsets();
972 static oop initialize_and_allocate(BasicType type, TRAPS);
973 public:
974 // Allocation. Returns a boxed value, or null for invalid type.
975 static oop create(BasicType type, jvalue* value, TRAPS);
976 // Accessors. Returns the basic type being boxed, or T_ILLEGAL for invalid oop.
977 static BasicType get_value(oop box, jvalue* value);
978 static BasicType set_value(oop box, jvalue* value);
979 static BasicType basic_type(oop box);
980 static bool is_instance(oop box) { return basic_type(box) != T_ILLEGAL; }
981 static bool is_instance(oop box, BasicType type) { return basic_type(box) == type; }
982 static void print(oop box, outputStream* st) { jvalue value; print(get_value(box, &value), &value, st); }
983 static void print(BasicType type, jvalue* value, outputStream* st);
984
985 static int value_offset(BasicType type) {
986 return is_double_word_type(type) ? _long_value_offset : _value_offset;
987 }
988
989 static void serialize_offsets(SerializeClosure* f);
990
991 // Debugging
992 friend class JavaClasses;
993 };
994
995
996
997 // Interface to java.lang.ref.Reference objects
998
999 class java_lang_ref_Reference: AllStatic {
1000 static int _referent_offset;
1001 static int _queue_offset;
1002 static int _next_offset;
1003 static int _discovered_offset;
1004
1005 static bool _offsets_initialized;
1006
1007 public:
1008 // Accessors
1009 static inline oop weak_referent_no_keepalive(oop ref);
1010 static inline oop weak_referent(oop ref);
1011 static inline oop phantom_referent_no_keepalive(oop ref);
1012 static inline oop unknown_referent_no_keepalive(oop ref);
1013 static inline void clear_referent(oop ref);
1014 static inline void clear_referent_raw(oop ref);
1015 static inline HeapWord* referent_addr_raw(oop ref);
1016 static inline oop next(oop ref);
1017 static inline void set_next(oop ref, oop value);
1018 static inline void set_next_raw(oop ref, oop value);
1019 static inline HeapWord* next_addr_raw(oop ref);
1020 static inline oop discovered(oop ref);
1021 static inline void set_discovered(oop ref, oop value);
1022 static inline void set_discovered_raw(oop ref, oop value);
1023 static inline HeapWord* discovered_addr_raw(oop ref);
1024 static bool is_referent_field(oop obj, ptrdiff_t offset);
1025 static inline bool is_final(oop ref);
1026 static inline bool is_phantom(oop ref);
1027 static inline bool is_weak(oop ref);
1028 static inline bool is_soft(oop ref);
1029
1030 static int referent_offset() { CHECK_INIT(_referent_offset); }
1031 static int queue_offset() { CHECK_INIT(_queue_offset); }
1032 static int next_offset() { CHECK_INIT(_next_offset); }
1033 static int discovered_offset() { CHECK_INIT(_discovered_offset); }
1034
1035 static void compute_offsets();
1036 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1037 };
1038
1039
1040 // Interface to java.lang.ref.SoftReference objects
1041
1042 class java_lang_ref_SoftReference: public java_lang_ref_Reference {
1043 static int _timestamp_offset;
1044 static int _static_clock_offset;
1045
1046 public:
1047 // Accessors
1048 static jlong timestamp(oop ref);
1049
1050 // Accessors for statics
1051 static jlong clock();
1052 static void set_clock(jlong value);
1053
1054 static void compute_offsets();
1055 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1056 };
1057
1058 // Interface to java.lang.invoke.MethodHandle objects
1059
1060 class java_lang_invoke_MethodHandle: AllStatic {
1061 friend class JavaClasses;
1062
1063 private:
1064 static int _type_offset; // the MethodType of this MH
1065 static int _form_offset; // the LambdaForm of this MH
1066
1067 static void compute_offsets();
1068
1069 public:
1070 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1071
1072 // Accessors
1073 static oop type(oop mh);
1074 static void set_type(oop mh, oop mtype);
1075
1076 static oop form(oop mh);
1077 static void set_form(oop mh, oop lform);
1078
1079 // Testers
1080 static bool is_subclass(Klass* klass) {
1081 return klass->is_subclass_of(vmClasses::MethodHandle_klass());
1082 }
1083 static bool is_instance(oop obj);
1084
1085 // Accessors for code generation:
1086 static int type_offset() { CHECK_INIT(_type_offset); }
1087 static int form_offset() { CHECK_INIT(_form_offset); }
1088 };
1089
1090 // Interface to java.lang.invoke.DirectMethodHandle objects
1091
1092 class java_lang_invoke_DirectMethodHandle: AllStatic {
1093 friend class JavaClasses;
1094
1095 private:
1096 static int _member_offset; // the MemberName of this DMH
1097
1098 static void compute_offsets();
1099
1100 public:
1101 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1102
1103 // Accessors
1104 static oop member(oop mh);
1105
1106 // Testers
1107 static bool is_subclass(Klass* klass) {
1108 return klass->is_subclass_of(vmClasses::DirectMethodHandle_klass());
1109 }
1110 static bool is_instance(oop obj);
1111
1112 // Accessors for code generation:
1113 static int member_offset() { CHECK_INIT(_member_offset); }
1114 };
1115
1116 // Interface to java.lang.invoke.LambdaForm objects
1117 // (These are a private interface for managing adapter code generation.)
1118
1119 class java_lang_invoke_LambdaForm: AllStatic {
1120 friend class JavaClasses;
1121
1122 private:
1123 static int _vmentry_offset; // type is MemberName
1124
1125 static void compute_offsets();
1126
1127 public:
1128 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1129
1130 // Accessors
1131 static oop vmentry(oop lform);
1132
1133 // Testers
1134 static bool is_subclass(Klass* klass) {
1135 return vmClasses::LambdaForm_klass() != nullptr &&
1136 klass->is_subclass_of(vmClasses::LambdaForm_klass());
1137 }
1138 static bool is_instance(oop obj);
1139
1140 // Accessors for code generation:
1141 static int vmentry_offset() { CHECK_INIT(_vmentry_offset); }
1142 };
1143
1144 // Interface to java.lang.invoke.NativeEntryPoint objects
1145 // (These are a private interface for managing adapter code generation.)
1146
1147 class jdk_internal_foreign_abi_NativeEntryPoint: AllStatic {
1148 friend class JavaClasses;
1149
1150 private:
1151 static int _method_type_offset;
1152 static int _downcall_stub_address_offset;
1153
1154 static void compute_offsets();
1155
1156 public:
1157 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1158
1159 // Accessors
1160 static oop method_type(oop entry);
1161 static jlong downcall_stub_address(oop entry);
1162
1163 // Testers
1164 static bool is_subclass(Klass* klass) {
1165 return vmClasses::NativeEntryPoint_klass() != nullptr &&
1166 klass->is_subclass_of(vmClasses::NativeEntryPoint_klass());
1167 }
1168 static bool is_instance(oop obj);
1169
1170 // Accessors for code generation:
1171 static int method_type_offset_in_bytes() { return _method_type_offset; }
1172 static int downcall_stub_address_offset_in_bytes() { return _downcall_stub_address_offset; }
1173 };
1174
1175 class jdk_internal_foreign_abi_ABIDescriptor: AllStatic {
1176 friend class JavaClasses;
1177
1178 private:
1179 static int _inputStorage_offset;
1180 static int _outputStorage_offset;
1181 static int _volatileStorage_offset;
1182 static int _stackAlignment_offset;
1183 static int _shadowSpace_offset;
1184 static int _scratch1_offset;
1185 static int _scratch2_offset;
1186
1187 static void compute_offsets();
1188
1189 public:
1190 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1191
1192 // Accessors
1193 static objArrayOop inputStorage(oop entry);
1194 static objArrayOop outputStorage(oop entry);
1195 static objArrayOop volatileStorage(oop entry);
1196 static jint stackAlignment(oop entry);
1197 static jint shadowSpace(oop entry);
1198 static oop scratch1(oop entry);
1199 static oop scratch2(oop entry);
1200
1201 // Testers
1202 static bool is_subclass(Klass* klass) {
1203 return vmClasses::ABIDescriptor_klass() != nullptr &&
1204 klass->is_subclass_of(vmClasses::ABIDescriptor_klass());
1205 }
1206 static bool is_instance(oop obj);
1207 };
1208
1209 class jdk_internal_foreign_abi_VMStorage: AllStatic {
1210 friend class JavaClasses;
1211
1212 private:
1213 static int _type_offset;
1214 static int _indexOrOffset_offset;
1215 static int _segmentMaskOrSize_offset;
1216 static int _debugName_offset;
1217
1218 static void compute_offsets();
1219
1220 public:
1221 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1222
1223 // Accessors
1224 static jbyte type(oop entry);
1225 static jint index_or_offset(oop entry);
1226 static jshort segment_mask_or_size(oop entry);
1227 static oop debugName(oop entry);
1228
1229 // Testers
1230 static bool is_subclass(Klass* klass) {
1231 return vmClasses::VMStorage_klass() != nullptr &&
1232 klass->is_subclass_of(vmClasses::VMStorage_klass());
1233 }
1234 static bool is_instance(oop obj);
1235 };
1236
1237 class jdk_internal_foreign_abi_CallConv: AllStatic {
1238 friend class JavaClasses;
1239
1240 private:
1241 static int _argRegs_offset;
1242 static int _retRegs_offset;
1243
1244 static void compute_offsets();
1245
1246 public:
1247 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1248
1249 // Accessors
1250 static objArrayOop argRegs(oop entry);
1251 static objArrayOop retRegs(oop entry);
1252
1253 // Testers
1254 static bool is_subclass(Klass* klass) {
1255 return vmClasses::CallConv_klass() != nullptr &&
1256 klass->is_subclass_of(vmClasses::CallConv_klass());
1257 }
1258 static bool is_instance(oop obj);
1259 };
1260
1261 // Interface to java.lang.invoke.MemberName objects
1262 // (These are a private interface for Java code to query the class hierarchy.)
1263
1264 #define RESOLVEDMETHOD_INJECTED_FIELDS(macro) \
1265 macro(java_lang_invoke_ResolvedMethodName, vmtarget, intptr_signature, false)
1266
1267 class java_lang_invoke_ResolvedMethodName : AllStatic {
1268 friend class JavaClasses;
1269
1270 static int _vmtarget_offset;
1271 static int _vmholder_offset;
1272
1273 static void compute_offsets();
1274 public:
1275 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1276
1277 static int vmtarget_offset() { CHECK_INIT(_vmtarget_offset); }
1278
1279 static Method* vmtarget(oop resolved_method);
1280 static void set_vmtarget(oop resolved_method, Method* method);
1281
1282 static void set_vmholder(oop resolved_method, oop holder);
1283
1284 // find or create resolved member name
1285 static oop find_resolved_method(const methodHandle& m, TRAPS);
1286
1287 static bool is_instance(oop resolved_method);
1288 };
1289
1290
1291 #define MEMBERNAME_INJECTED_FIELDS(macro) \
1292 macro(java_lang_invoke_MemberName, vmindex, intptr_signature, false)
1293
1294
1295 class java_lang_invoke_MemberName: AllStatic {
1296 friend class JavaClasses;
1297
1298 private:
1299 // From java.lang.invoke.MemberName:
1300 // private Class<?> clazz; // class in which the method is defined
1301 // private String name; // may be null if not yet materialized
1302 // private Object type; // may be null if not yet materialized
1303 // private int flags; // modifier bits; see reflect.Modifier
1304 // private ResolvedMethodName method; // holds VM-specific target value
1305 // private intptr_t vmindex; // member index within class or interface
1306 static int _clazz_offset;
1307 static int _name_offset;
1308 static int _type_offset;
1309 static int _flags_offset;
1310 static int _method_offset;
1311 static int _vmindex_offset;
1312
1313 static void compute_offsets();
1314
1315 public:
1316 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1317 // Accessors
1318 static oop clazz(oop mname);
1319 static void set_clazz(oop mname, oop clazz);
1320
1321 static oop type(oop mname);
1322 static void set_type(oop mname, oop type);
1323
1324 static oop name(oop mname);
1325 static void set_name(oop mname, oop name);
1326
1327 static int flags(oop mname);
1328 static void set_flags(oop mname, int flags);
1329
1330 // Link through ResolvedMethodName field to get Method*
1331 static Method* vmtarget(oop mname);
1332 static void set_method(oop mname, oop method);
1333
1334 static intptr_t vmindex(oop mname);
1335 static void set_vmindex(oop mname, intptr_t index);
1336
1337 // Testers
1338 static bool is_subclass(Klass* klass) {
1339 return klass->is_subclass_of(vmClasses::MemberName_klass());
1340 }
1341 static bool is_instance(oop obj);
1342
1343 static bool is_method(oop obj);
1344
1345 // Relevant integer codes (keep these in synch. with MethodHandleNatives.Constants):
1346 enum {
1347 MN_IS_METHOD = 0x00010000, // method (not constructor)
1348 MN_IS_CONSTRUCTOR = 0x00020000, // constructor
1349 MN_IS_FIELD = 0x00040000, // field
1350 MN_IS_TYPE = 0x00080000, // nested type
1351 MN_CALLER_SENSITIVE = 0x00100000, // @CallerSensitive annotation detected
1352 MN_TRUSTED_FINAL = 0x00200000, // trusted final field
1353 MN_HIDDEN_MEMBER = 0x00400000, // @Hidden annotation detected
1354 MN_REFERENCE_KIND_SHIFT = 24, // refKind
1355 MN_REFERENCE_KIND_MASK = 0x0F000000 >> MN_REFERENCE_KIND_SHIFT,
1356 MN_NESTMATE_CLASS = 0x00000001,
1357 MN_HIDDEN_CLASS = 0x00000002,
1358 MN_STRONG_LOADER_LINK = 0x00000004,
1359 MN_ACCESS_VM_ANNOTATIONS = 0x00000008,
1360 // Lookup modes
1361 MN_MODULE_MODE = 0x00000010,
1362 MN_UNCONDITIONAL_MODE = 0x00000020,
1363 MN_TRUSTED_MODE = -1
1364 };
1365
1366 // Accessors for code generation:
1367 static int clazz_offset() { CHECK_INIT(_clazz_offset); }
1368 static int type_offset() { CHECK_INIT(_type_offset); }
1369 static int flags_offset() { CHECK_INIT(_flags_offset); }
1370 static int method_offset() { CHECK_INIT(_method_offset); }
1371 static int vmindex_offset() { CHECK_INIT(_vmindex_offset); }
1372 };
1373
1374
1375 // Interface to java.lang.invoke.MethodType objects
1376
1377 class java_lang_invoke_MethodType: AllStatic {
1378 friend class JavaClasses;
1379
1380 private:
1381 static int _rtype_offset;
1382 static int _ptypes_offset;
1383
1384 static void compute_offsets();
1385
1386 public:
1387 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1388 // Accessors
1389 static oop rtype(oop mt);
1390 static objArrayOop ptypes(oop mt);
1391
1392 static oop ptype(oop mt, int index);
1393 static int ptype_count(oop mt);
1394
1395 static int ptype_slot_count(oop mt); // extra counts for long/double
1396 static int rtype_slot_count(oop mt); // extra counts for long/double
1397
1398 static Symbol* as_signature(oop mt, bool intern_if_not_found);
1399 static void print_signature(oop mt, outputStream* st);
1400
1401 static bool is_instance(oop obj);
1402
1403 static bool equals(oop mt1, oop mt2);
1404
1405 // Accessors for code generation:
1406 static int rtype_offset() { CHECK_INIT(_rtype_offset); }
1407 static int ptypes_offset() { CHECK_INIT(_ptypes_offset); }
1408 };
1409
1410
1411 // Interface to java.lang.invoke.CallSite objects
1412
1413 class java_lang_invoke_CallSite: AllStatic {
1414 friend class JavaClasses;
1415
1416 private:
1417 static int _target_offset;
1418 static int _context_offset;
1419
1420 static void compute_offsets();
1421
1422 public:
1423 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1424 // Accessors
1425 static oop target( oop site);
1426 static void set_target( oop site, oop target);
1427 static void set_target_volatile( oop site, oop target);
1428
1429 static oop context_no_keepalive(oop site);
1430
1431 // Testers
1432 static bool is_subclass(Klass* klass) {
1433 return klass->is_subclass_of(vmClasses::CallSite_klass());
1434 }
1435 static bool is_instance(oop obj);
1436
1437 // Accessors for code generation:
1438 static int target_offset() { CHECK_INIT(_target_offset); }
1439 static int context_offset() { CHECK_INIT(_context_offset); }
1440 };
1441
1442 // Interface to java.lang.invoke.ConstantCallSite objects
1443
1444 class java_lang_invoke_ConstantCallSite: AllStatic {
1445 friend class JavaClasses;
1446
1447 private:
1448 static int _is_frozen_offset;
1449
1450 static void compute_offsets();
1451
1452 public:
1453 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1454 // Accessors
1455 static jboolean is_frozen(oop site);
1456
1457 // Testers
1458 static bool is_subclass(Klass* klass) {
1459 return klass->is_subclass_of(vmClasses::ConstantCallSite_klass());
1460 }
1461 static bool is_instance(oop obj);
1462 };
1463
1464 // Interface to java.lang.invoke.MethodHandleNatives$CallSiteContext objects
1465
1466 #define CALLSITECONTEXT_INJECTED_FIELDS(macro) \
1467 macro(java_lang_invoke_MethodHandleNatives_CallSiteContext, vmdependencies, intptr_signature, false) \
1468 macro(java_lang_invoke_MethodHandleNatives_CallSiteContext, last_cleanup, long_signature, false)
1469
1470 class DependencyContext;
1471
1472 class java_lang_invoke_MethodHandleNatives_CallSiteContext : AllStatic {
1473 friend class JavaClasses;
1474
1475 private:
1476 static int _vmdependencies_offset;
1477 static int _last_cleanup_offset;
1478
1479 static void compute_offsets();
1480
1481 public:
1482 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1483 // Accessors
1484 static DependencyContext vmdependencies(oop context);
1485
1486 // Testers
1487 static bool is_subclass(Klass* klass) {
1488 return klass->is_subclass_of(vmClasses::Context_klass());
1489 }
1490 static bool is_instance(oop obj);
1491 };
1492
1493 // Interface to java.lang.ClassLoader objects
1494
1495 #define CLASSLOADER_INJECTED_FIELDS(macro) \
1496 macro(java_lang_ClassLoader, loader_data, intptr_signature, false)
1497
1498 class java_lang_ClassLoader : AllStatic {
1499 private:
1500 static int _loader_data_offset;
1501 static int _parent_offset;
1502 static int _parallelCapable_offset;
1503 static int _name_offset;
1504 static int _nameAndId_offset;
1505 static int _unnamedModule_offset;
1506
1507 static void compute_offsets();
1508
1509 public:
1510 // Support for CDS
1511 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1512 static int loader_data_offset() { return _loader_data_offset; }
1513
1514 static ClassLoaderData* loader_data_acquire(oop loader);
1515 static ClassLoaderData* loader_data(oop loader);
1516 static void release_set_loader_data(oop loader, ClassLoaderData* new_data);
1517
1518 static oop parent(oop loader);
1519 static oop parent_no_keepalive(oop loader);
1520 static oop name(oop loader);
1521 static oop nameAndId(oop loader);
1522 static bool isAncestor(oop loader, oop cl);
1523
1524 // Support for parallelCapable field
1525 static bool parallelCapable(oop the_class_mirror);
1526
1527 static bool is_trusted_loader(oop loader);
1528
1529 // Testers
1530 static bool is_subclass(Klass* klass) {
1531 return klass->is_subclass_of(vmClasses::ClassLoader_klass());
1532 }
1533 static bool is_instance(oop obj);
1534
1535 static oop unnamedModule(oop loader);
1536
1537 // Debugging
1538 friend class JavaClasses;
1539 };
1540
1541
1542 // Interface to java.lang.System objects
1543
1544 class java_lang_System : AllStatic {
1545 private:
1546 static int _static_in_offset;
1547 static int _static_out_offset;
1548 static int _static_err_offset;
1549
1550 public:
1551 static int in_offset() { CHECK_INIT(_static_in_offset); }
1552 static int out_offset() { CHECK_INIT(_static_out_offset); }
1553 static int err_offset() { CHECK_INIT(_static_err_offset); }
1554
1555 static void compute_offsets();
1556 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1557
1558 // Debugging
1559 friend class JavaClasses;
1560 };
1561
1562
1563 // Interface to java.lang.StackTraceElement objects
1564
1565 class java_lang_StackTraceElement: AllStatic {
1566 private:
1567 static int _declaringClassObject_offset;
1568 static int _classLoaderName_offset;
1569 static int _moduleName_offset;
1570 static int _moduleVersion_offset;
1571 static int _declaringClass_offset;
1572 static int _methodName_offset;
1573 static int _fileName_offset;
1574 static int _lineNumber_offset;
1575
1576 // Setters
1577 static void set_classLoaderName(oop element, oop value);
1578 static void set_moduleName(oop element, oop value);
1579 static void set_moduleVersion(oop element, oop value);
1580 static void set_declaringClass(oop element, oop value);
1581 static void set_methodName(oop element, oop value);
1582 static void set_fileName(oop element, oop value);
1583 static void set_lineNumber(oop element, int value);
1584 static void set_declaringClassObject(oop element, oop value);
1585
1586 static void decode_file_and_line(Handle java_mirror, InstanceKlass* holder, int version,
1587 const methodHandle& method, int bci,
1588 Symbol*& source, oop& source_file, int& line_number, TRAPS);
1589
1590 public:
1591 // Create an instance of StackTraceElement
1592 static oop create(const methodHandle& method, int bci, TRAPS);
1593
1594 static void fill_in(Handle element, InstanceKlass* holder, const methodHandle& method,
1595 int version, int bci, Symbol* name, TRAPS);
1596
1597 static void compute_offsets();
1598 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1599
1600 #if INCLUDE_JVMCI
1601 static void decode(const methodHandle& method, int bci, Symbol*& fileName, int& lineNumber, TRAPS);
1602 #endif
1603
1604 // Debugging
1605 friend class JavaClasses;
1606 };
1607
1608
1609 class Backtrace: AllStatic {
1610 public:
1611 // Helper backtrace functions to store bci|version together.
1612 static int merge_bci_and_version(int bci, int version);
1613 static int merge_mid_and_cpref(int mid, int cpref);
1614 static int bci_at(unsigned int merged);
1615 static int version_at(unsigned int merged);
1616 static int mid_at(unsigned int merged);
1617 static int cpref_at(unsigned int merged);
1618 static int get_line_number(Method* method, int bci);
1619 static Symbol* get_source_file_name(InstanceKlass* holder, int version);
1620
1621 // Debugging
1622 friend class JavaClasses;
1623 };
1624
1625 class java_lang_ClassFrameInfo: AllStatic {
1626 private:
1627 static int _classOrMemberName_offset;
1628 static int _flags_offset;
1629
1630 public:
1631 static oop classOrMemberName(oop info);
1632 static int flags(oop info);
1633
1634 // Setters
1635 static void init_class(Handle stackFrame, const methodHandle& m);
1636 static void init_method(Handle stackFrame, const methodHandle& m, TRAPS);
1637
1638 static void compute_offsets();
1639 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1640
1641 // Debugging
1642 friend class JavaClasses;
1643 };
1644
1645 // Interface to java.lang.StackFrameInfo objects
1646
1647 #define STACKFRAMEINFO_INJECTED_FIELDS(macro) \
1648 macro(java_lang_StackFrameInfo, version, short_signature, false)
1649
1650 class java_lang_StackFrameInfo: AllStatic {
1651 private:
1652 static int _type_offset;
1653 static int _name_offset;
1654 static int _bci_offset;
1655 static int _version_offset;
1656 static int _contScope_offset;
1657
1658 public:
1659 // Getters
1660 static oop name(oop info);
1661 static oop type(oop info);
1662 static Method* get_method(oop info);
1663
1664 // Setters
1665 static void set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, oop cont, TRAPS);
1666 static void set_name(oop info, oop value);
1667 static void set_type(oop info, oop value);
1668 static void set_bci(oop info, int value);
1669
1670 static void set_version(oop info, short value);
1671 static void set_contScope(oop info, oop value);
1672
1673 static void compute_offsets();
1674 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1675
1676 static void to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS);
1677
1678 // Debugging
1679 friend class JavaClasses;
1680 };
1681
1682 class java_lang_LiveStackFrameInfo: AllStatic {
1683 private:
1684 static int _monitors_offset;
1685 static int _locals_offset;
1686 static int _operands_offset;
1687 static int _mode_offset;
1688
1689 public:
1690 static void set_monitors(oop info, oop value);
1691 static void set_locals(oop info, oop value);
1692 static void set_operands(oop info, oop value);
1693 static void set_mode(oop info, int value);
1694
1695 static void compute_offsets();
1696 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1697
1698 // Debugging
1699 friend class JavaClasses;
1700 };
1701
1702 // Interface to java.lang.reflect.RecordComponent objects
1703
1704 class java_lang_reflect_RecordComponent: AllStatic {
1705 private:
1706 static int _clazz_offset;
1707 static int _name_offset;
1708 static int _type_offset;
1709 static int _accessor_offset;
1710 static int _signature_offset;
1711 static int _annotations_offset;
1712 static int _typeAnnotations_offset;
1713
1714 // Setters
1715 static void set_clazz(oop element, oop value);
1716 static void set_name(oop element, oop value);
1717 static void set_type(oop element, oop value);
1718 static void set_accessor(oop element, oop value);
1719 static void set_signature(oop element, oop value);
1720 static void set_annotations(oop element, oop value);
1721 static void set_typeAnnotations(oop element, oop value);
1722
1723 public:
1724 // Create an instance of RecordComponent
1725 static oop create(InstanceKlass* holder, RecordComponent* component, TRAPS);
1726
1727 static void compute_offsets();
1728 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1729
1730 // Debugging
1731 friend class JavaClasses;
1732 };
1733
1734
1735 // Interface to java.lang.AssertionStatusDirectives objects
1736
1737 class java_lang_AssertionStatusDirectives: AllStatic {
1738 private:
1739 static int _classes_offset;
1740 static int _classEnabled_offset;
1741 static int _packages_offset;
1742 static int _packageEnabled_offset;
1743 static int _deflt_offset;
1744
1745 public:
1746 // Setters
1747 static void set_classes(oop obj, oop val);
1748 static void set_classEnabled(oop obj, oop val);
1749 static void set_packages(oop obj, oop val);
1750 static void set_packageEnabled(oop obj, oop val);
1751 static void set_deflt(oop obj, bool val);
1752
1753 static void compute_offsets();
1754 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1755
1756 // Debugging
1757 friend class JavaClasses;
1758 };
1759
1760
1761 class java_util_concurrent_locks_AbstractOwnableSynchronizer : AllStatic {
1762 private:
1763 static int _owner_offset;
1764 public:
1765 static void compute_offsets();
1766 static oop get_owner_threadObj(oop obj);
1767 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1768 };
1769
1770 // Interface to jdk.internal.misc.UnsafeConsants
1771
1772 class jdk_internal_misc_UnsafeConstants : AllStatic {
1773 public:
1774 static void set_unsafe_constants();
1775 static void compute_offsets() { }
1776 static void serialize_offsets(SerializeClosure* f) { }
1777 };
1778
1779 // Interface to jdk.internal.vm.vector.VectorSupport.VectorPayload objects
1780
1781 class vector_VectorPayload : AllStatic {
1782 private:
1783 static int _payload_offset;
1784 public:
1785 static void set_payload(oop o, oop val);
1786
1787 static void compute_offsets();
1788 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1789
1790 // Testers
1791 static bool is_subclass(Klass* klass) {
1792 return klass->is_subclass_of(vmClasses::vector_VectorPayload_klass());
1793 }
1794 static bool is_instance(oop obj);
1795 };
1796
1797 class java_lang_Integer : AllStatic {
1798 public:
1799 static jint value(oop obj);
1800 };
1801
1802 class java_lang_Long : AllStatic {
1803 public:
1804 static jlong value(oop obj);
1805 };
1806
1807 class java_lang_Character : AllStatic {
1808 public:
1809 static jchar value(oop obj);
1810 };
1811
1812 class java_lang_Short : AllStatic {
1813 public:
1814 static jshort value(oop obj);
1815 };
1816
1817 class java_lang_Byte : AllStatic {
1818 public:
1819 static jbyte value(oop obj);
1820 };
1821
1822 class java_lang_Boolean : AllStatic {
1823 private:
1824 static int _static_TRUE_offset;
1825 static int _static_FALSE_offset;
1826 public:
1827 static Symbol* symbol();
1828 static void compute_offsets(InstanceKlass* k);
1829 static oop get_TRUE(InstanceKlass *k);
1830 static oop get_FALSE(InstanceKlass *k);
1831 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1832 static jboolean value(oop obj);
1833 };
1834
1835 class java_lang_Integer_IntegerCache : AllStatic {
1836 private:
1837 static int _static_cache_offset;
1838 public:
1839 static Symbol* symbol();
1840 static void compute_offsets(InstanceKlass* k);
1841 static objArrayOop cache(InstanceKlass *k);
1842 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1843 };
1844
1845 class java_lang_Long_LongCache : AllStatic {
1846 private:
1847 static int _static_cache_offset;
1848 public:
1849 static Symbol* symbol();
1850 static void compute_offsets(InstanceKlass* k);
1851 static objArrayOop cache(InstanceKlass *k);
1852 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1853 };
1854
1855 class java_lang_Character_CharacterCache : AllStatic {
1856 private:
1857 static int _static_cache_offset;
1858 public:
1859 static Symbol* symbol();
1860 static void compute_offsets(InstanceKlass* k);
1861 static objArrayOop cache(InstanceKlass *k);
1862 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1863 };
1864
1865 class java_lang_Short_ShortCache : AllStatic {
1866 private:
1867 static int _static_cache_offset;
1868 public:
1869 static Symbol* symbol();
1870 static void compute_offsets(InstanceKlass* k);
1871 static objArrayOop cache(InstanceKlass *k);
1872 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1873 };
1874
1875 class java_lang_Byte_ByteCache : AllStatic {
1876 private:
1877 static int _static_cache_offset;
1878 public:
1879 static Symbol* symbol();
1880 static void compute_offsets(InstanceKlass* k);
1881 static objArrayOop cache(InstanceKlass *k);
1882 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1883 };
1884
1885
1886 // Interface to java.lang.InternalError objects
1887
1888 #define INTERNALERROR_INJECTED_FIELDS(macro) \
1889 macro(java_lang_InternalError, during_unsafe_access, bool_signature, false)
1890
1891 class java_lang_InternalError : AllStatic {
1892 private:
1893 static int _during_unsafe_access_offset;
1894 public:
1895 static jboolean during_unsafe_access(oop internal_error);
1896 static void set_during_unsafe_access(oop internal_error);
1897 static void compute_offsets();
1898 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1899 };
1900
1901 // Use to declare fields that need to be injected into Java classes
1902 // for the JVM to use. The name_index and signature_index are
1903 // declared in vmSymbols. The may_be_java flag is used to declare
1904 // fields that might already exist in Java but should be injected if
1905 // they don't. Otherwise the field is unconditionally injected and
1906 // the JVM uses the injected one. This is to ensure that name
1907 // collisions don't occur. In general may_be_java should be false
1908 // unless there's a good reason.
1909
1910 class InjectedField {
1911 public:
1912 const vmClassID klass_id;
1913 const vmSymbolID name_index;
1914 const vmSymbolID signature_index;
1915 const bool may_be_java;
1916
1917
1918 Klass* klass() const { return vmClasses::klass_at(klass_id); }
1919 Symbol* name() const { return lookup_symbol(name_index); }
1920 Symbol* signature() const { return lookup_symbol(signature_index); }
1921
1922 int compute_offset();
1923
1924 // Find the Symbol for this index
1925 static Symbol* lookup_symbol(vmSymbolID symbol_index) {
1926 return Symbol::vm_symbol_at(symbol_index);
1927 }
1928 };
1929
1930
1931 // Interface to hard-coded offset checking
1932
1933 enum class InjectedFieldID : int;
1934
1935 class JavaClasses : AllStatic {
1936 private:
1937
1938 static InjectedField _injected_fields[];
1939
1940 static bool check_offset(const char *klass_name, int offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1941 public:
1942
1943 static int compute_injected_offset(InjectedFieldID id);
1944
1945 static void compute_offsets();
1946 static void check_offsets() PRODUCT_RETURN;
1947 static void serialize_offsets(SerializeClosure* soc) NOT_CDS_RETURN;
1948 static InjectedField* get_injected(Symbol* class_name, int* field_count);
1949 static bool is_supported_for_archiving(oop obj) NOT_CDS_JAVA_HEAP_RETURN_(false);
1950
1951 static void compute_offset(int &dest_offset,
1952 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol,
1953 bool is_static = false);
1954 static void compute_offset(int& dest_offset, InstanceKlass* ik,
1955 const char* name_string, Symbol* signature_symbol,
1956 bool is_static = false);
1957 };
1958
1959 #undef CHECK_INIT
1960
1961 #endif // SHARE_CLASSFILE_JAVACLASSES_HPP