1 /*
2 * Copyright (c) 1997, 2025, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_CLASSFILE_JAVACLASSES_HPP
26 #define SHARE_CLASSFILE_JAVACLASSES_HPP
27
28 #include "classfile/vmClasses.hpp"
29 #include "oops/instanceKlass.hpp"
30 #include "oops/oopsHierarchy.hpp"
31 #include "oops/symbol.hpp"
32 #include "runtime/handles.hpp"
33 #include "runtime/os.hpp"
34 #include "utilities/macros.hpp"
35 #include "utilities/utf8.hpp"
36 #include "utilities/vmEnums.hpp"
37
38 class JvmtiThreadState;
39 class RecordComponent;
40 class SerializeClosure;
41 class ObjectWaiter;
42 class ObjectMonitor;
43
44 #define CHECK_INIT(offset) assert(offset != 0, "should be initialized"); return offset;
45
46 // Interface to java.lang.Object objects
47
48 class java_lang_Object : AllStatic {
49 public:
50 static void register_natives(TRAPS);
51 };
52
53 // Interface to java.lang.String objects
54
55 // The flags field is a collection of bits representing boolean values used
56 // internally by the VM.
57 #define STRING_INJECTED_FIELDS(macro) \
58 macro(java_lang_String, flags, byte_signature, false)
59
60 class java_lang_String : AllStatic {
61 private:
62 static int _value_offset;
63 static int _hash_offset;
64 static int _hashIsZero_offset;
65 static int _coder_offset;
66 static int _flags_offset;
67
68 static bool _initialized;
69
70 static Handle basic_create(int length, bool byte_arr, TRAPS);
71
72 static inline void set_coder(oop string, jbyte coder);
73
74 // Bitmasks for values in the injected flags field.
75 static const uint8_t _deduplication_forbidden_mask = 1 << 0;
76 static const uint8_t _deduplication_requested_mask = 1 << 1;
77
78 static int flags_offset() { CHECK_INIT(_flags_offset); }
79 // Return the address of the injected flags field.
80 static inline uint8_t* flags_addr(oop java_string);
81 // Test whether the designated bit of the injected flags field is set.
82 static inline bool is_flag_set(oop java_string, uint8_t flag_mask);
83 // Atomically test and set the designated bit of the injected flags field,
84 // returning true if the bit was already set.
85 static bool test_and_set_flag(oop java_string, uint8_t flag_mask);
86
87 static inline unsigned int hash_code_impl(oop java_string, bool update);
88
89 public:
90
91 // Coders
92 enum Coder {
93 CODER_LATIN1 = 0,
94 CODER_UTF16 = 1
95 };
96
97 static void compute_offsets();
98 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
99
100 // Instance creation
101 static Handle create_from_unicode(const jchar* unicode, int len, TRAPS);
102 static oop create_oop_from_unicode(const jchar* unicode, int len, TRAPS);
103 static Handle create_from_str(const char* utf8_str, TRAPS);
104 static oop create_oop_from_str(const char* utf8_str, TRAPS);
105 static Handle create_from_symbol(const Symbol* symbol, TRAPS);
106 static Handle create_from_platform_dependent_str(const char* str, TRAPS);
107
108 static void set_compact_strings(bool value);
109
110 static int value_offset() { CHECK_INIT(_value_offset); }
111 static int coder_offset() { CHECK_INIT(_coder_offset); }
112
113 static inline void set_value(oop string, typeArrayOop buffer);
114
115 // Set the deduplication_forbidden flag true. This flag is sticky; once
116 // set it never gets cleared. This is set when a String is interned in
117 // the StringTable, to prevent string deduplication from changing the
118 // String's value array.
119 static inline void set_deduplication_forbidden(oop java_string);
120
121 // Test and set the deduplication_requested flag. Returns the old value
122 // of the flag. This flag is sticky; once set it never gets cleared.
123 // Some GCs may use this flag when deciding whether to request
124 // deduplication of a String, to avoid multiple requests for the same
125 // object.
126 static inline bool test_and_set_deduplication_requested(oop java_string);
127
128 // Accessors
129 static inline typeArrayOop value(oop java_string);
130 static inline typeArrayOop value_no_keepalive(oop java_string);
131 static inline bool hash_is_set(oop string);
132 static inline bool is_latin1(oop java_string);
133 static inline bool deduplication_forbidden(oop java_string);
134 static inline bool deduplication_requested(oop java_string);
135 static inline int length(oop java_string);
136 static inline int length(oop java_string, typeArrayOop string_value);
137 static size_t utf8_length(oop java_string);
138 static size_t utf8_length(oop java_string, typeArrayOop string_value);
139 // Legacy variants that truncate the length if needed
140 static int utf8_length_as_int(oop java_string);
141 static int utf8_length_as_int(oop java_string, typeArrayOop string_value);
142
143 // String converters
144 static char* as_utf8_string(oop java_string);
145 // `length` is set to the length of the utf8 sequence.
146 static char* as_utf8_string(oop java_string, size_t& length);
147 static char* as_utf8_string_full(oop java_string, char* buf, size_t buflen, size_t& length);
148 static char* as_utf8_string(oop java_string, char* buf, size_t buflen);
149 static char* as_utf8_string(oop java_string, int start, int len);
150 static char* as_utf8_string(oop java_string, typeArrayOop value, char* buf, size_t buflen);
151 static char* as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, size_t buflen);
152 static char* as_platform_dependent_str(Handle java_string, TRAPS);
153 static jchar* as_unicode_string(oop java_string, int& length, TRAPS);
154 static jchar* as_unicode_string_or_null(oop java_string, int& length);
155 // produce an ascii string with all other values quoted using \u####
156 static char* as_quoted_ascii(oop java_string);
157
158 // Compute the hash value for a java.lang.String object which would
159 // contain the characters passed in.
160 //
161 // As the hash value used by the String object itself, in
162 // String.hashCode(). This value is normally calculated in Java code
163 // in the String.hashCode method(), but is precomputed for String
164 // objects in the shared archive file.
165 // hash P(31) from Kernighan & Ritchie
166 //
167 // For this reason, THIS ALGORITHM MUST MATCH String.hashCode().
168 static unsigned int hash_code(const jchar* s, int len) {
169 unsigned int h = 0;
170 while (len-- > 0) {
171 h = 31*h + (unsigned int) *s;
172 s++;
173 }
174 return h;
175 }
176
177 static unsigned int hash_code(const jbyte* s, int len) {
178 unsigned int h = 0;
179 while (len-- > 0) {
180 h = 31*h + (((unsigned int) *s) & 0xFF);
181 s++;
182 }
183 return h;
184 }
185
186 static unsigned int hash_code(const char* utf8_str, size_t utf8_len) {
187 unsigned int h = 0;
188 int unicode_length = UTF8::unicode_length(utf8_str, utf8_len);
189
190 jchar c;
191 while (unicode_length-- > 0) {
192 utf8_str = UTF8::next(utf8_str, &c);
193 h = 31 * h + ((unsigned int)c);
194 }
195 return h;
196 }
197
198 static unsigned int hash_code(oop java_string);
199 static unsigned int hash_code_noupdate(oop java_string);
200
201 // Compare strings (of different types/encodings), length is the string (array) length
202 static bool equals(oop java_string, const jchar* chars, int len);
203 static bool equals(oop java_string, const char* utf8_str, size_t utf8_len);
204 static bool equals(oop str1, oop str2);
205 static inline bool value_equals(typeArrayOop str_value1, typeArrayOop str_value2);
206
207 // Conversion between '.' and '/' formats, and allocate a String from the result.
208 static Handle externalize_classname(Symbol* java_name, TRAPS);
209
210 // Conversion
211 static Symbol* as_symbol(oop java_string);
212 static Symbol* as_symbol_or_null(oop java_string);
213
214 // Tester
215 static inline bool is_instance(oop obj);
216
217 // Debugging
218 static void print(oop java_string, outputStream* st, int max_length = MaxStringPrintSize);
219 friend class JavaClasses;
220 friend class StringTable;
221 };
222
223
224 // Interface to java.lang.Class objects
225
226 #define CLASS_INJECTED_FIELDS(macro) \
227 macro(java_lang_Class, klass, intptr_signature, false) \
228 macro(java_lang_Class, array_klass, intptr_signature, false) \
229 macro(java_lang_Class, oop_size, int_signature, false) \
230 macro(java_lang_Class, static_oop_field_count, int_signature, false) \
231 macro(java_lang_Class, source_file, object_signature, false) \
232 macro(java_lang_Class, init_lock, object_signature, false)
233
234 class java_lang_Class : AllStatic {
235 friend class VMStructs;
236 friend class JVMCIVMStructs;
237 friend class HeapShared;
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 static int _modifiers_offset;
261 static int _is_primitive_offset;
262 static int _raw_access_flags_offset;
263
264 static bool _offsets_computed;
265
266 static GrowableArray<Klass*>* _fixup_mirror_list;
267 static GrowableArray<Klass*>* _fixup_module_field_list;
268
269 static void set_init_lock(oop java_class, oop init_lock);
270 static void set_protection_domain(oop java_class, oop protection_domain);
271 static void set_class_loader(oop java_class, oop class_loader);
272 static void set_component_mirror(oop java_class, oop comp_mirror);
273 static void initialize_mirror_fields(InstanceKlass* ik, Handle mirror, Handle protection_domain,
274 Handle classData, TRAPS);
275 static void set_mirror_module_field(JavaThread* current, Klass* K, Handle mirror, Handle module);
276 public:
277 static void allocate_fixup_lists();
278 static void compute_offsets();
279
280 // Instance creation
281 static void allocate_mirror(Klass* k, bool is_scratch, Handle protection_domain, Handle classData,
282 Handle& mirror, Handle& comp_mirror, TRAPS); // returns mirror and comp_mirror
283 static void create_mirror(Klass* k, Handle class_loader, Handle module,
284 Handle protection_domain, Handle classData, TRAPS);
285 static void fixup_mirror(Klass* k, TRAPS);
286 static oop create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS);
287
288 // Archiving
289 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
290 static void create_scratch_mirror(Klass* k, TRAPS) NOT_CDS_JAVA_HEAP_RETURN;
291 static bool restore_archived_mirror(Klass *k, Handle class_loader, Handle module,
292 Handle protection_domain,
293 TRAPS) NOT_CDS_JAVA_HEAP_RETURN_(false);
294
295 static void fixup_module_field(Klass* k, Handle module);
296
297 // Conversion -- java_class must not be null. The return value is null only if java_class is a primitive type.
298 static Klass* as_Klass(oop java_class);
299 static InstanceKlass* as_InstanceKlass(oop java_class);
300
301 static void set_klass(oop java_class, Klass* klass);
302 static BasicType as_BasicType(oop java_class, Klass** reference_klass = nullptr);
303 static Symbol* as_signature(oop java_class, bool intern_if_not_found);
304 static void print_signature(oop java_class, outputStream *st);
305 static const char* as_external_name(oop java_class);
306 // Testing
307 static bool is_instance(oop obj);
308
309 static bool is_primitive(oop java_class);
310 static void set_is_primitive(oop java_class);
311 static BasicType primitive_type(oop java_class);
312 static oop primitive_mirror(BasicType t);
313 // JVM_NewArray support
314 static Klass* array_klass_acquire(oop java_class);
315 static void release_set_array_klass(oop java_class, Klass* klass);
316 // compiler support for class operations
317 static int klass_offset() { CHECK_INIT(_klass_offset); }
318 static int array_klass_offset() { CHECK_INIT(_array_klass_offset); }
319 // Support for classRedefinedCount field
320 static int classRedefinedCount(oop the_class_mirror);
321 static void set_classRedefinedCount(oop the_class_mirror, int value);
322
323 // Support for embedded per-class oops
324 static oop protection_domain(oop java_class);
325 static oop init_lock(oop java_class);
326 static void clear_init_lock(oop java_class) {
327 set_init_lock(java_class, nullptr);
328 }
329 static oop component_mirror(oop java_class);
330 static int component_mirror_offset() { return _component_mirror_offset; }
331 static objArrayOop signers(oop java_class);
332 static oop class_data(oop java_class);
333 static void set_class_data(oop java_class, oop classData);
334 static void set_reflection_data(oop java_class, oop reflection_data);
335 static int reflection_data_offset() { return _reflectionData_offset; }
336
337 static oop class_loader(oop java_class);
338 static void set_module(oop java_class, oop module);
339 static oop module(oop java_class);
340
341 static oop name(Handle java_class, TRAPS);
342
343 static oop source_file(oop java_class);
344 static void set_source_file(oop java_class, oop source_file);
345
346 static int modifiers(oop java_class);
347 static void set_modifiers(oop java_class, u2 value);
348
349 static int raw_access_flags(oop java_class);
350 static void set_raw_access_flags(oop java_class, u2 value);
351
352 static size_t oop_size(oop java_class);
353 static void set_oop_size(HeapWord* java_class, size_t size);
354 static int static_oop_field_count(oop java_class);
355 static void set_static_oop_field_count(oop java_class, int size);
356
357 static GrowableArray<Klass*>* fixup_mirror_list() {
358 return _fixup_mirror_list;
359 }
360 static void set_fixup_mirror_list(GrowableArray<Klass*>* v) {
361 _fixup_mirror_list = v;
362 }
363
364 static GrowableArray<Klass*>* fixup_module_field_list() {
365 return _fixup_module_field_list;
366 }
367 static void set_fixup_module_field_list(GrowableArray<Klass*>* v) {
368 _fixup_module_field_list = v;
369 }
370
371 // Debugging
372 friend class JavaClasses;
373 };
374
375 // Interface to java.lang.Thread objects
376
377 #define THREAD_INJECTED_FIELDS(macro) \
378 macro(java_lang_Thread, jvmti_thread_state, intptr_signature, false) \
379 macro(java_lang_Thread, jvmti_VTMS_transition_disable_count, int_signature, false) \
380 macro(java_lang_Thread, jvmti_is_in_VTMS_transition, bool_signature, false) \
381 JFR_ONLY(macro(java_lang_Thread, jfr_epoch, short_signature, false))
382
383 class java_lang_Thread : AllStatic {
384 friend class java_lang_VirtualThread;
385 friend class JVMCIVMStructs;
386 private:
387 // Note that for this class the layout changed between JDK1.2 and JDK1.3,
388 // so we compute the offsets at startup rather than hard-wiring them.
389 static int _holder_offset;
390 static int _name_offset;
391 static int _contextClassLoader_offset;
392 static int _eetop_offset;
393 static int _jvmti_thread_state_offset;
394 static int _jvmti_VTMS_transition_disable_count_offset;
395 static int _jvmti_is_in_VTMS_transition_offset;
396 static int _interrupted_offset;
397 static int _interruptLock_offset;
398 static int _tid_offset;
399 static int _continuation_offset;
400 static int _park_blocker_offset;
401 static int _scopedValueBindings_offset;
402 JFR_ONLY(static int _jfr_epoch_offset;)
403
404 static void compute_offsets();
405
406 public:
407 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
408
409 // Returns the JavaThread associated with the thread obj
410 static JavaThread* thread(oop java_thread);
411 static JavaThread* thread_acquire(oop java_thread);
412 // Set JavaThread for instance
413 static void set_thread(oop java_thread, JavaThread* thread);
414 static void release_set_thread(oop java_thread, JavaThread* thread);
415 // FieldHolder
416 static oop holder(oop java_thread);
417 // interruptLock
418 static oop interrupt_lock(oop java_thread);
419 // Interrupted status
420 static bool interrupted(oop java_thread);
421 static void set_interrupted(oop java_thread, bool val);
422 // Name
423 static oop name(oop java_thread);
424 static void set_name(oop java_thread, oop name);
425 // Priority
426 static ThreadPriority priority(oop java_thread);
427 static void set_priority(oop java_thread, ThreadPriority priority);
428 // Thread group
429 static oop threadGroup(oop java_thread);
430 // Alive (NOTE: this is not really a field, but provides the correct
431 // definition without doing a Java call)
432 static bool is_alive(oop java_thread);
433 // Daemon
434 static bool is_daemon(oop java_thread);
435 static void set_daemon(oop java_thread);
436 // Context ClassLoader
437 static oop context_class_loader(oop java_thread);
438 // Stack size hint
439 static jlong stackSize(oop java_thread);
440 // Thread ID
441 static int64_t thread_id(oop java_thread);
442 static ByteSize thread_id_offset();
443 // Continuation
444 static inline oop continuation(oop java_thread);
445
446 static JvmtiThreadState* jvmti_thread_state(oop java_thread);
447 static void set_jvmti_thread_state(oop java_thread, JvmtiThreadState* state);
448 static int VTMS_transition_disable_count(oop java_thread);
449 static void inc_VTMS_transition_disable_count(oop java_thread);
450 static void dec_VTMS_transition_disable_count(oop java_thread);
451 static bool is_in_VTMS_transition(oop java_thread);
452 static void set_is_in_VTMS_transition(oop java_thread, bool val);
453 static int is_in_VTMS_transition_offset();
454
455 // Clear all scoped value bindings on error
456 static void clear_scopedValueBindings(oop java_thread);
457
458 // Blocker object responsible for thread parking
459 static oop park_blocker(oop java_thread);
460
461 // Write thread status info to threadStatus field of java.lang.Thread.
462 static void set_thread_status(oop java_thread_oop, JavaThreadStatus status);
463 // Read thread status info from threadStatus field of java.lang.Thread.
464 static JavaThreadStatus get_thread_status(oop java_thread_oop);
465
466 static const char* thread_status_name(oop java_thread_oop);
467
468 // Fill in current stack trace, can cause GC
469 static oop async_get_stack_trace(jobject jthread, TRAPS);
470
471 JFR_ONLY(static u2 jfr_epoch(oop java_thread);)
472 JFR_ONLY(static void set_jfr_epoch(oop java_thread, u2 epoch);)
473 JFR_ONLY(static int jfr_epoch_offset() { CHECK_INIT(_jfr_epoch_offset); })
474
475 // Debugging
476 friend class JavaClasses;
477 };
478
479 // Interface to java.lang.Thread$FieldHolder objects
480
481 class java_lang_Thread_FieldHolder : AllStatic {
482 private:
483 static int _group_offset;
484 static int _priority_offset;
485 static int _stackSize_offset;
486 static int _daemon_offset;
487 static int _thread_status_offset;
488
489 static void compute_offsets();
490
491 public:
492 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
493
494 static oop threadGroup(oop holder);
495
496 static ThreadPriority priority(oop holder);
497 static void set_priority(oop holder, ThreadPriority priority);
498
499 static jlong stackSize(oop holder);
500
501 static bool is_daemon(oop holder);
502 static void set_daemon(oop holder, bool val);
503
504 static void set_thread_status(oop holder, JavaThreadStatus status);
505 static JavaThreadStatus get_thread_status(oop holder);
506
507 friend class JavaClasses;
508 };
509
510 // Interface to java.lang.Thread$Constants objects
511
512 class java_lang_Thread_Constants : AllStatic {
513 private:
514 static int _static_VTHREAD_GROUP_offset;
515 static int _static_NOT_SUPPORTED_CLASSLOADER_offset;
516
517 static void compute_offsets();
518 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
519
520 public:
521 static oop get_VTHREAD_GROUP();
522
523 friend class JavaClasses;
524 };
525
526 // Interface to java.lang.ThreadGroup objects
527
528 class java_lang_ThreadGroup : AllStatic {
529 private:
530 static int _parent_offset;
531 static int _name_offset;
532 static int _maxPriority_offset;
533 static int _daemon_offset;
534
535 static void compute_offsets();
536 public:
537 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
538
539 // parent ThreadGroup
540 static oop parent(oop java_thread_group);
541 // name
542 static const char* name(oop java_thread_group);
543 // maxPriority in group
544 static ThreadPriority maxPriority(oop java_thread_group);
545 // Daemon
546 static bool is_daemon(oop java_thread_group);
547
548 // Debugging
549 friend class JavaClasses;
550 };
551
552
553 // Interface to java.lang.VirtualThread objects
554 #define VTHREAD_INJECTED_FIELDS(macro) \
555 macro(java_lang_VirtualThread, objectWaiter, intptr_signature, false)
556
557 class java_lang_VirtualThread : AllStatic {
558 private:
559 static int static_vthread_scope_offset;
560 static int _carrierThread_offset;
561 static int _continuation_offset;
562 static int _state_offset;
563 static int _next_offset;
564 static int _onWaitingList_offset;
565 static int _notified_offset;
566 static int _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 // additional state bits
595 SUSPENDED = 1 << 8, // suspended when unmounted
596 };
597
598 static void compute_offsets();
599 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
600
601 // Testers
602 static bool is_subclass(Klass* klass) {
603 return klass->is_subclass_of(vmClasses::VirtualThread_klass());
604 }
605 static bool is_instance(oop obj);
606
607 static oop vthread_scope();
608 static oop carrier_thread(oop vthread);
609 static oop continuation(oop vthread);
610 static int state(oop vthread);
611 static void set_state(oop vthread, int state);
612 static int cmpxchg_state(oop vthread, int old_state, int new_state);
613 static oop next(oop vthread);
614 static void set_next(oop vthread, oop next_vthread);
615 static bool set_onWaitingList(oop vthread, OopHandle& list_head);
616 static jlong timeout(oop vthread);
617 static void set_timeout(oop vthread, jlong value);
618 static void set_notified(oop vthread, jboolean value);
619 static void set_interruptible_wait(oop vthread, jboolean value);
620 static bool is_preempted(oop vthread);
621 static JavaThreadStatus map_state_to_thread_status(int state);
622
623 static inline ObjectWaiter* objectWaiter(oop vthread);
624 static inline void set_objectWaiter(oop vthread, ObjectWaiter* waiter);
625 static ObjectMonitor* current_pending_monitor(oop vthread);
626 static ObjectMonitor* current_waiting_monitor(oop vthread);
627 };
628
629
630 // Interface to java.lang.Throwable objects
631
632 class java_lang_Throwable: AllStatic {
633 friend class BacktraceBuilder;
634 friend class BacktraceIterator;
635
636 private:
637 // Trace constants
638 enum {
639 trace_methods_offset = 0,
640 trace_bcis_offset = 1,
641 trace_mirrors_offset = 2,
642 trace_names_offset = 3,
643 trace_conts_offset = 4,
644 trace_next_offset = 5,
645 trace_hidden_offset = 6,
646 trace_size = 7,
647 trace_chunk_size = 32
648 };
649
650 static int _backtrace_offset;
651 static int _detailMessage_offset;
652 static int _stackTrace_offset;
653 static int _depth_offset;
654 static int _cause_offset;
655 static int _static_unassigned_stacktrace_offset;
656
657 // StackTrace (programmatic access, new since 1.4)
658 static void clear_stacktrace(oop throwable);
659 // Stacktrace (post JDK 1.7.0 to allow immutability protocol to be followed)
660 static void set_stacktrace(oop throwable, oop st_element_array);
661 static oop unassigned_stacktrace();
662
663 public:
664 // Backtrace
665 static oop backtrace(oop throwable);
666 static void set_backtrace(oop throwable, oop value);
667 static int depth(oop throwable);
668 static void set_depth(oop throwable, int value);
669 // Message
670 static int get_detailMessage_offset() { CHECK_INIT(_detailMessage_offset); }
671 static oop message(oop throwable);
672 static const char* message_as_utf8(oop throwable);
673 static void set_message(oop throwable, oop value);
674
675 static oop cause(oop throwable);
676
677 static void print_stack_element(outputStream *st, Method* method, int bci);
678
679 static void compute_offsets();
680 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
681
682 // Allocate space for backtrace (created but stack trace not filled in)
683 static void allocate_backtrace(Handle throwable, TRAPS);
684 // Fill in current stack trace for throwable with preallocated backtrace (no GC)
685 static void fill_in_stack_trace_of_preallocated_backtrace(Handle throwable);
686 // Fill in current stack trace, can cause GC
687 static void fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS);
688 static void fill_in_stack_trace(Handle throwable, const methodHandle& method = methodHandle());
689
690 // Programmatic access to stack trace
691 static void get_stack_trace_elements(int depth, Handle backtrace, objArrayHandle stack_trace, TRAPS);
692
693 // For recreating class initialization error exceptions.
694 static Handle create_initialization_error(JavaThread* current, Handle throwable);
695
696 // Printing
697 static void print(oop throwable, outputStream* st);
698 static void print_stack_trace(Handle throwable, outputStream* st);
699 static void java_printStackTrace(Handle throwable, TRAPS);
700 // Debugging
701 friend class JavaClasses;
702 // Gets the method and bci of the top frame (TOS). Returns false if this failed.
703 static bool get_top_method_and_bci(oop throwable, Method** method, int* bci);
704 };
705
706
707 // Interface to java.lang.reflect.AccessibleObject objects
708
709 class java_lang_reflect_AccessibleObject: AllStatic {
710 private:
711 // Note that to reduce dependencies on the JDK we compute these
712 // offsets at run-time.
713 static int _override_offset;
714
715 static void compute_offsets();
716
717 public:
718 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
719
720 // Accessors
721 static jboolean override(oop reflect);
722 static void set_override(oop reflect, jboolean value);
723
724 // Debugging
725 friend class JavaClasses;
726 };
727
728
729 // Interface to java.lang.reflect.Method objects
730
731 class java_lang_reflect_Method : public java_lang_reflect_AccessibleObject {
732 private:
733 // Note that to reduce dependencies on the JDK we compute these
734 // offsets at run-time.
735 static int _clazz_offset;
736 static int _name_offset;
737 static int _returnType_offset;
738 static int _parameterTypes_offset;
739 static int _exceptionTypes_offset;
740 static int _slot_offset;
741 static int _modifiers_offset;
742 static int _signature_offset;
743 static int _annotations_offset;
744 static int _parameter_annotations_offset;
745 static int _annotation_default_offset;
746
747 static void compute_offsets();
748 public:
749 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
750
751 // Allocation
752 static Handle create(TRAPS);
753
754 // Accessors
755 static oop clazz(oop reflect);
756 static void set_clazz(oop reflect, oop value);
757
758 static void set_name(oop method, oop value);
759
760 static oop return_type(oop method);
761 static void set_return_type(oop method, oop value);
762
763 static oop parameter_types(oop method);
764 static void set_parameter_types(oop method, oop value);
765
766 static int slot(oop reflect);
767 static void set_slot(oop reflect, int value);
768
769 static void set_exception_types(oop method, oop value);
770 static void set_modifiers(oop method, int value);
771 static void set_signature(oop method, oop value);
772 static void set_annotations(oop method, oop value);
773 static void set_parameter_annotations(oop method, oop value);
774 static void set_annotation_default(oop method, oop value);
775
776 // Debugging
777 friend class JavaClasses;
778 };
779
780
781 // Interface to java.lang.reflect.Constructor objects
782
783 class java_lang_reflect_Constructor : public java_lang_reflect_AccessibleObject {
784 private:
785 // Note that to reduce dependencies on the JDK we compute these
786 // offsets at run-time.
787 static int _clazz_offset;
788 static int _parameterTypes_offset;
789 static int _exceptionTypes_offset;
790 static int _slot_offset;
791 static int _modifiers_offset;
792 static int _signature_offset;
793 static int _annotations_offset;
794 static int _parameter_annotations_offset;
795
796 static void compute_offsets();
797 public:
798 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
799
800 // Allocation
801 static Handle create(TRAPS);
802
803 // Accessors
804 static oop clazz(oop reflect);
805 static void set_clazz(oop reflect, oop value);
806
807 static oop parameter_types(oop constructor);
808 static void set_parameter_types(oop constructor, oop value);
809
810 static int slot(oop reflect);
811 static void set_slot(oop reflect, int value);
812
813 static void set_exception_types(oop constructor, oop value);
814 static void set_modifiers(oop constructor, int value);
815 static void set_signature(oop constructor, oop value);
816 static void set_annotations(oop constructor, oop value);
817 static void set_parameter_annotations(oop method, oop value);
818
819 // Debugging
820 friend class JavaClasses;
821 };
822
823
824 // Interface to java.lang.reflect.Field objects
825
826 class java_lang_reflect_Field : public java_lang_reflect_AccessibleObject {
827 private:
828 // Note that to reduce dependencies on the JDK we compute these
829 // offsets at run-time.
830 static int _clazz_offset;
831 static int _name_offset;
832 static int _type_offset;
833 static int _slot_offset;
834 static int _modifiers_offset;
835 static int _trusted_final_offset;
836 static int _signature_offset;
837 static int _annotations_offset;
838
839 static void compute_offsets();
840
841 public:
842 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
843
844 // Allocation
845 static Handle create(TRAPS);
846
847 // Accessors
848 static oop clazz(oop reflect);
849 static void set_clazz(oop reflect, oop value);
850
851 static oop name(oop field);
852 static void set_name(oop field, oop value);
853
854 static oop type(oop field);
855 static void set_type(oop field, oop value);
856
857 static int slot(oop reflect);
858 static void set_slot(oop reflect, int value);
859
860 static int modifiers(oop field);
861 static void set_modifiers(oop field, int value);
862
863 static void set_trusted_final(oop field);
864
865 static void set_signature(oop constructor, oop value);
866 static void set_annotations(oop constructor, oop value);
867
868 // Debugging
869 friend class JavaClasses;
870 };
871
872 class java_lang_reflect_Parameter {
873 private:
874 // Note that to reduce dependencies on the JDK we compute these
875 // offsets at run-time.
876 static int _name_offset;
877 static int _modifiers_offset;
878 static int _index_offset;
879 static int _executable_offset;
880
881 static void compute_offsets();
882
883 public:
884 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
885
886 // Allocation
887 static Handle create(TRAPS);
888
889 // Accessors
890 static oop name(oop field);
891 static void set_name(oop field, oop value);
892
893 static int index(oop reflect);
894 static void set_index(oop reflect, int value);
895
896 static int modifiers(oop reflect);
897 static void set_modifiers(oop reflect, int value);
898
899 static oop executable(oop constructor);
900 static void set_executable(oop constructor, oop value);
901
902 friend class JavaClasses;
903 };
904
905 #define MODULE_INJECTED_FIELDS(macro) \
906 macro(java_lang_Module, module_entry, intptr_signature, false)
907
908 class java_lang_Module {
909 private:
910 static int _loader_offset;
911 static int _name_offset;
912 static int _module_entry_offset;
913
914 static void compute_offsets();
915
916 public:
917 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
918
919 // Allocation
920 static Handle create(Handle loader, Handle module_name, TRAPS);
921
922 // Testers
923 static bool is_instance(oop obj);
924
925 // Accessors
926 static oop loader(oop module);
927 static void set_loader(oop module, oop value);
928
929 // CDS
930 static int module_entry_offset() { return _module_entry_offset; }
931
932 static oop name(oop module);
933 static void set_name(oop module, oop value);
934
935 static ModuleEntry* module_entry(oop module);
936 static ModuleEntry* module_entry_raw(oop module);
937 static void set_module_entry(oop module, ModuleEntry* module_entry);
938
939 friend class JavaClasses;
940 };
941
942 #define CONSTANTPOOL_INJECTED_FIELDS(macro) \
943 macro(reflect_ConstantPool, vmholder, object_signature, false)
944
945 // Interface to jdk.internal.reflect.ConstantPool objects
946 class reflect_ConstantPool {
947 private:
948 // Note that to reduce dependencies on the JDK we compute these
949 // offsets at run-time. This field is the oop offset for the
950 // actual constant pool, previously called constantPoolOop.
951 static int _vmholder_offset;
952
953 static void compute_offsets();
954
955 public:
956 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
957
958 // Allocation
959 static Handle create(TRAPS);
960
961 // Accessors
962 static void set_cp(oop reflect, ConstantPool* value);
963
964 static ConstantPool* get_cp(oop reflect);
965
966 // Debugging
967 friend class JavaClasses;
968 };
969
970
971 // Interface to java.lang primitive type boxing objects:
972 // - java.lang.Boolean
973 // - java.lang.Character
974 // - java.lang.Float
975 // - java.lang.Double
976 // - java.lang.Byte
977 // - java.lang.Short
978 // - java.lang.Integer
979 // - java.lang.Long
980
981 // This could be separated out into 8 individual classes.
982
983 class java_lang_boxing_object: AllStatic {
984 private:
985 static int _value_offset;
986 static int _long_value_offset;
987
988 static void compute_offsets();
989 static oop initialize_and_allocate(BasicType type, TRAPS);
990 public:
991 // Allocation. Returns a boxed value, or null for invalid type.
992 static oop create(BasicType type, jvalue* value, TRAPS);
993 // Accessors. Returns the basic type being boxed, or T_ILLEGAL for invalid oop.
994 static BasicType get_value(oop box, jvalue* value);
995 static BasicType set_value(oop box, jvalue* value);
996 static BasicType basic_type(oop box);
997 static bool is_instance(oop box) { return basic_type(box) != T_ILLEGAL; }
998 static bool is_instance(oop box, BasicType type) { return basic_type(box) == type; }
999 static void print(oop box, outputStream* st) { jvalue value; print(get_value(box, &value), &value, st); }
1000 static void print(BasicType type, jvalue* value, outputStream* st);
1001
1002 static int value_offset(BasicType type) {
1003 return is_double_word_type(type) ? _long_value_offset : _value_offset;
1004 }
1005
1006 static void serialize_offsets(SerializeClosure* f);
1007
1008 // Debugging
1009 friend class JavaClasses;
1010 };
1011
1012
1013
1014 // Interface to java.lang.ref.Reference objects
1015
1016 class java_lang_ref_Reference: AllStatic {
1017 static int _referent_offset;
1018 static int _queue_offset;
1019 static int _next_offset;
1020 static int _discovered_offset;
1021
1022 static bool _offsets_initialized;
1023
1024 public:
1025 // Accessors
1026 static inline oop weak_referent_no_keepalive(oop ref);
1027 static inline oop weak_referent(oop ref);
1028 static inline oop phantom_referent_no_keepalive(oop ref);
1029 static inline oop unknown_referent_no_keepalive(oop ref);
1030 static inline void clear_referent(oop ref);
1031 static inline void clear_referent_raw(oop ref);
1032 static inline HeapWord* referent_addr_raw(oop ref);
1033 static inline oop next(oop ref);
1034 static inline void set_next(oop ref, oop value);
1035 static inline void set_next_raw(oop ref, oop value);
1036 static inline HeapWord* next_addr_raw(oop ref);
1037 static inline oop discovered(oop ref);
1038 static inline void set_discovered(oop ref, oop value);
1039 static inline void set_discovered_raw(oop ref, oop value);
1040 static inline HeapWord* discovered_addr_raw(oop ref);
1041 static bool is_referent_field(oop obj, ptrdiff_t offset);
1042 static inline bool is_final(oop ref);
1043 static inline bool is_phantom(oop ref);
1044 static inline bool is_weak(oop ref);
1045 static inline bool is_soft(oop ref);
1046
1047 static int referent_offset() { CHECK_INIT(_referent_offset); }
1048 static int queue_offset() { CHECK_INIT(_queue_offset); }
1049 static int next_offset() { CHECK_INIT(_next_offset); }
1050 static int discovered_offset() { CHECK_INIT(_discovered_offset); }
1051
1052 static void compute_offsets();
1053 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1054 };
1055
1056
1057 // Interface to java.lang.ref.SoftReference objects
1058
1059 class java_lang_ref_SoftReference: public java_lang_ref_Reference {
1060 static int _timestamp_offset;
1061 static int _static_clock_offset;
1062
1063 public:
1064 // Accessors
1065 static jlong timestamp(oop ref);
1066
1067 // Accessors for statics
1068 static jlong clock();
1069 static void set_clock(jlong value);
1070
1071 static void compute_offsets();
1072 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1073 };
1074
1075 // Interface to java.lang.invoke.MethodHandle objects
1076
1077 class java_lang_invoke_MethodHandle: AllStatic {
1078 friend class JavaClasses;
1079
1080 private:
1081 static int _type_offset; // the MethodType of this MH
1082 static int _form_offset; // the LambdaForm of this MH
1083
1084 static void compute_offsets();
1085
1086 public:
1087 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1088
1089 // Accessors
1090 static oop type(oop mh);
1091 static void set_type(oop mh, oop mtype);
1092
1093 static oop form(oop mh);
1094 static void set_form(oop mh, oop lform);
1095
1096 // Testers
1097 static bool is_subclass(Klass* klass) {
1098 return klass->is_subclass_of(vmClasses::MethodHandle_klass());
1099 }
1100 static bool is_instance(oop obj);
1101
1102 // Accessors for code generation:
1103 static int type_offset() { CHECK_INIT(_type_offset); }
1104 static int form_offset() { CHECK_INIT(_form_offset); }
1105 };
1106
1107 // Interface to java.lang.invoke.DirectMethodHandle objects
1108
1109 class java_lang_invoke_DirectMethodHandle: AllStatic {
1110 friend class JavaClasses;
1111
1112 private:
1113 static int _member_offset; // the MemberName of this DMH
1114
1115 static void compute_offsets();
1116
1117 public:
1118 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1119
1120 // Accessors
1121 static oop member(oop mh);
1122
1123 // Testers
1124 static bool is_subclass(Klass* klass) {
1125 return klass->is_subclass_of(vmClasses::DirectMethodHandle_klass());
1126 }
1127 static bool is_instance(oop obj);
1128
1129 // Accessors for code generation:
1130 static int member_offset() { CHECK_INIT(_member_offset); }
1131 };
1132
1133 // Interface to java.lang.invoke.LambdaForm objects
1134 // (These are a private interface for managing adapter code generation.)
1135
1136 class java_lang_invoke_LambdaForm: AllStatic {
1137 friend class JavaClasses;
1138
1139 private:
1140 static int _vmentry_offset; // type is MemberName
1141
1142 static void compute_offsets();
1143
1144 public:
1145 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1146
1147 // Accessors
1148 static oop vmentry(oop lform);
1149
1150 // Testers
1151 static bool is_subclass(Klass* klass) {
1152 return vmClasses::LambdaForm_klass() != nullptr &&
1153 klass->is_subclass_of(vmClasses::LambdaForm_klass());
1154 }
1155 static bool is_instance(oop obj);
1156
1157 // Accessors for code generation:
1158 static int vmentry_offset() { CHECK_INIT(_vmentry_offset); }
1159 };
1160
1161 // Interface to java.lang.invoke.NativeEntryPoint objects
1162 // (These are a private interface for managing adapter code generation.)
1163
1164 class jdk_internal_foreign_abi_NativeEntryPoint: AllStatic {
1165 friend class JavaClasses;
1166
1167 private:
1168 static int _method_type_offset;
1169 static int _downcall_stub_address_offset;
1170
1171 static void compute_offsets();
1172
1173 public:
1174 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1175
1176 // Accessors
1177 static oop method_type(oop entry);
1178 static jlong downcall_stub_address(oop entry);
1179
1180 // Testers
1181 static bool is_subclass(Klass* klass) {
1182 return vmClasses::NativeEntryPoint_klass() != nullptr &&
1183 klass->is_subclass_of(vmClasses::NativeEntryPoint_klass());
1184 }
1185 static bool is_instance(oop obj);
1186
1187 // Accessors for code generation:
1188 static int method_type_offset_in_bytes() { return _method_type_offset; }
1189 static int downcall_stub_address_offset_in_bytes() { return _downcall_stub_address_offset; }
1190 };
1191
1192 class jdk_internal_foreign_abi_ABIDescriptor: AllStatic {
1193 friend class JavaClasses;
1194
1195 private:
1196 static int _inputStorage_offset;
1197 static int _outputStorage_offset;
1198 static int _volatileStorage_offset;
1199 static int _stackAlignment_offset;
1200 static int _shadowSpace_offset;
1201 static int _scratch1_offset;
1202 static int _scratch2_offset;
1203
1204 static void compute_offsets();
1205
1206 public:
1207 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1208
1209 // Accessors
1210 static objArrayOop inputStorage(oop entry);
1211 static objArrayOop outputStorage(oop entry);
1212 static objArrayOop volatileStorage(oop entry);
1213 static jint stackAlignment(oop entry);
1214 static jint shadowSpace(oop entry);
1215 static oop scratch1(oop entry);
1216 static oop scratch2(oop entry);
1217
1218 // Testers
1219 static bool is_subclass(Klass* klass) {
1220 return vmClasses::ABIDescriptor_klass() != nullptr &&
1221 klass->is_subclass_of(vmClasses::ABIDescriptor_klass());
1222 }
1223 static bool is_instance(oop obj);
1224 };
1225
1226 class jdk_internal_foreign_abi_VMStorage: AllStatic {
1227 friend class JavaClasses;
1228
1229 private:
1230 static int _type_offset;
1231 static int _indexOrOffset_offset;
1232 static int _segmentMaskOrSize_offset;
1233 static int _debugName_offset;
1234
1235 static void compute_offsets();
1236
1237 public:
1238 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1239
1240 // Accessors
1241 static jbyte type(oop entry);
1242 static jint index_or_offset(oop entry);
1243 static jshort segment_mask_or_size(oop entry);
1244 static oop debugName(oop entry);
1245
1246 // Testers
1247 static bool is_subclass(Klass* klass) {
1248 return vmClasses::VMStorage_klass() != nullptr &&
1249 klass->is_subclass_of(vmClasses::VMStorage_klass());
1250 }
1251 static bool is_instance(oop obj);
1252 };
1253
1254 class jdk_internal_foreign_abi_CallConv: AllStatic {
1255 friend class JavaClasses;
1256
1257 private:
1258 static int _argRegs_offset;
1259 static int _retRegs_offset;
1260
1261 static void compute_offsets();
1262
1263 public:
1264 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1265
1266 // Accessors
1267 static objArrayOop argRegs(oop entry);
1268 static objArrayOop retRegs(oop entry);
1269
1270 // Testers
1271 static bool is_subclass(Klass* klass) {
1272 return vmClasses::CallConv_klass() != nullptr &&
1273 klass->is_subclass_of(vmClasses::CallConv_klass());
1274 }
1275 static bool is_instance(oop obj);
1276 };
1277
1278 // Interface to java.lang.invoke.MemberName objects
1279 // (These are a private interface for Java code to query the class hierarchy.)
1280
1281 #define RESOLVEDMETHOD_INJECTED_FIELDS(macro) \
1282 macro(java_lang_invoke_ResolvedMethodName, vmtarget, intptr_signature, false)
1283
1284 class java_lang_invoke_ResolvedMethodName : AllStatic {
1285 friend class JavaClasses;
1286
1287 static int _vmtarget_offset;
1288 static int _vmholder_offset;
1289
1290 static void compute_offsets();
1291 public:
1292 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1293
1294 static int vmtarget_offset() { CHECK_INIT(_vmtarget_offset); }
1295
1296 static Method* vmtarget(oop resolved_method);
1297 static void set_vmtarget(oop resolved_method, Method* method);
1298
1299 static void set_vmholder(oop resolved_method, oop holder);
1300
1301 // find or create resolved member name
1302 static oop find_resolved_method(const methodHandle& m, TRAPS);
1303
1304 static bool is_instance(oop resolved_method);
1305 };
1306
1307
1308 #define MEMBERNAME_INJECTED_FIELDS(macro) \
1309 macro(java_lang_invoke_MemberName, vmindex, intptr_signature, false)
1310
1311
1312 class java_lang_invoke_MemberName: AllStatic {
1313 friend class JavaClasses;
1314
1315 private:
1316 // From java.lang.invoke.MemberName:
1317 // private Class<?> clazz; // class in which the method is defined
1318 // private String name; // may be null if not yet materialized
1319 // private Object type; // may be null if not yet materialized
1320 // private int flags; // modifier bits; see reflect.Modifier
1321 // private ResolvedMethodName method; // holds VM-specific target value
1322 // private intptr_t vmindex; // member index within class or interface
1323 static int _clazz_offset;
1324 static int _name_offset;
1325 static int _type_offset;
1326 static int _flags_offset;
1327 static int _method_offset;
1328 static int _vmindex_offset;
1329
1330 static void compute_offsets();
1331
1332 public:
1333 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1334 // Accessors
1335 static oop clazz(oop mname);
1336 static void set_clazz(oop mname, oop clazz);
1337
1338 static oop type(oop mname);
1339 static void set_type(oop mname, oop type);
1340
1341 static oop name(oop mname);
1342 static void set_name(oop mname, oop name);
1343
1344 static int flags(oop mname);
1345 static void set_flags(oop mname, int flags);
1346
1347 // Link through ResolvedMethodName field to get Method*
1348 static Method* vmtarget(oop mname);
1349 static void set_method(oop mname, oop method);
1350
1351 static intptr_t vmindex(oop mname);
1352 static void set_vmindex(oop mname, intptr_t index);
1353
1354 // Testers
1355 static bool is_subclass(Klass* klass) {
1356 return klass->is_subclass_of(vmClasses::MemberName_klass());
1357 }
1358 static bool is_instance(oop obj);
1359
1360 static bool is_method(oop obj);
1361
1362 // Relevant integer codes (keep these in synch. with MethodHandleNatives.Constants):
1363 enum {
1364 MN_IS_METHOD = 0x00010000, // method (not constructor)
1365 MN_IS_CONSTRUCTOR = 0x00020000, // constructor
1366 MN_IS_FIELD = 0x00040000, // field
1367 MN_IS_TYPE = 0x00080000, // nested type
1368 MN_CALLER_SENSITIVE = 0x00100000, // @CallerSensitive annotation detected
1369 MN_TRUSTED_FINAL = 0x00200000, // trusted final field
1370 MN_HIDDEN_MEMBER = 0x00400000, // @Hidden annotation detected
1371 MN_REFERENCE_KIND_SHIFT = 24, // refKind
1372 MN_REFERENCE_KIND_MASK = 0x0F000000 >> MN_REFERENCE_KIND_SHIFT,
1373 MN_NESTMATE_CLASS = 0x00000001,
1374 MN_HIDDEN_CLASS = 0x00000002,
1375 MN_STRONG_LOADER_LINK = 0x00000004,
1376 MN_ACCESS_VM_ANNOTATIONS = 0x00000008,
1377 // Lookup modes
1378 MN_MODULE_MODE = 0x00000010,
1379 MN_UNCONDITIONAL_MODE = 0x00000020,
1380 MN_TRUSTED_MODE = -1
1381 };
1382
1383 // Accessors for code generation:
1384 static int clazz_offset() { CHECK_INIT(_clazz_offset); }
1385 static int type_offset() { CHECK_INIT(_type_offset); }
1386 static int flags_offset() { CHECK_INIT(_flags_offset); }
1387 static int method_offset() { CHECK_INIT(_method_offset); }
1388 static int vmindex_offset() { CHECK_INIT(_vmindex_offset); }
1389 };
1390
1391
1392 // Interface to java.lang.invoke.MethodType objects
1393
1394 class java_lang_invoke_MethodType: AllStatic {
1395 friend class JavaClasses;
1396
1397 private:
1398 static int _rtype_offset;
1399 static int _ptypes_offset;
1400
1401 static void compute_offsets();
1402
1403 public:
1404 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1405 // Accessors
1406 static oop rtype(oop mt);
1407 static objArrayOop ptypes(oop mt);
1408
1409 static oop ptype(oop mt, int index);
1410 static int ptype_count(oop mt);
1411
1412 static int ptype_slot_count(oop mt); // extra counts for long/double
1413 static int rtype_slot_count(oop mt); // extra counts for long/double
1414
1415 static Symbol* as_signature(oop mt, bool intern_if_not_found);
1416 static void print_signature(oop mt, outputStream* st);
1417
1418 static bool is_instance(oop obj);
1419
1420 static bool equals(oop mt1, oop mt2);
1421
1422 // Accessors for code generation:
1423 static int rtype_offset() { CHECK_INIT(_rtype_offset); }
1424 static int ptypes_offset() { CHECK_INIT(_ptypes_offset); }
1425 };
1426
1427
1428 // Interface to java.lang.invoke.CallSite objects
1429 #define CALLSITE_INJECTED_FIELDS(macro) \
1430 macro(java_lang_invoke_CallSite, vmdependencies, intptr_signature, false) \
1431 macro(java_lang_invoke_CallSite, last_cleanup, long_signature, false)
1432
1433 class java_lang_invoke_CallSite: AllStatic {
1434 friend class JavaClasses;
1435
1436 private:
1437 static int _target_offset;
1438 static int _vmdependencies_offset;
1439 static int _last_cleanup_offset;
1440
1441 static void compute_offsets();
1442
1443 public:
1444 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1445 // Accessors
1446 static oop target( oop site);
1447 static void set_target( oop site, oop target);
1448 static void set_target_volatile( oop site, oop target);
1449
1450 static DependencyContext vmdependencies(oop call_site);
1451
1452 // Testers
1453 static bool is_subclass(Klass* klass) {
1454 return klass->is_subclass_of(vmClasses::CallSite_klass());
1455 }
1456 static bool is_instance(oop obj);
1457
1458 // Accessors for code generation:
1459 static int target_offset() { CHECK_INIT(_target_offset); }
1460 };
1461
1462 // Interface to java.lang.invoke.ConstantCallSite objects
1463
1464 class java_lang_invoke_ConstantCallSite: AllStatic {
1465 friend class JavaClasses;
1466
1467 private:
1468 static int _is_frozen_offset;
1469
1470 static void compute_offsets();
1471
1472 public:
1473 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1474 // Accessors
1475 static jboolean is_frozen(oop site);
1476
1477 // Testers
1478 static bool is_subclass(Klass* klass) {
1479 return klass->is_subclass_of(vmClasses::ConstantCallSite_klass());
1480 }
1481 static bool is_instance(oop obj);
1482 };
1483
1484 // Interface to java.lang.ClassLoader objects
1485
1486 #define CLASSLOADER_INJECTED_FIELDS(macro) \
1487 macro(java_lang_ClassLoader, loader_data, intptr_signature, false)
1488
1489 class java_lang_ClassLoader : AllStatic {
1490 private:
1491 static int _loader_data_offset;
1492 static int _parent_offset;
1493 static int _parallelCapable_offset;
1494 static int _name_offset;
1495 static int _nameAndId_offset;
1496 static int _unnamedModule_offset;
1497
1498 static void compute_offsets();
1499
1500 public:
1501 // Support for CDS
1502 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1503 static int loader_data_offset() { return _loader_data_offset; }
1504
1505 static ClassLoaderData* loader_data_acquire(oop loader);
1506 static ClassLoaderData* loader_data(oop loader);
1507 static void release_set_loader_data(oop loader, ClassLoaderData* new_data);
1508
1509 static oop parent(oop loader);
1510 static oop parent_no_keepalive(oop loader);
1511 static oop name(oop loader);
1512 static oop nameAndId(oop loader);
1513 static bool isAncestor(oop loader, oop cl);
1514
1515 // Support for parallelCapable field
1516 static bool parallelCapable(oop the_class_mirror);
1517
1518 static bool is_trusted_loader(oop loader);
1519
1520 // Testers
1521 static bool is_subclass(Klass* klass) {
1522 return klass->is_subclass_of(vmClasses::ClassLoader_klass());
1523 }
1524 static bool is_instance(oop obj);
1525
1526 static oop unnamedModule(oop loader);
1527
1528 // Debugging
1529 friend class JavaClasses;
1530 };
1531
1532
1533 // Interface to java.lang.System objects
1534
1535 class java_lang_System : AllStatic {
1536 private:
1537 static int _static_in_offset;
1538 static int _static_out_offset;
1539 static int _static_err_offset;
1540
1541 public:
1542 static int in_offset() { CHECK_INIT(_static_in_offset); }
1543 static int out_offset() { CHECK_INIT(_static_out_offset); }
1544 static int err_offset() { CHECK_INIT(_static_err_offset); }
1545
1546 static void compute_offsets();
1547 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1548
1549 // Debugging
1550 friend class JavaClasses;
1551 };
1552
1553
1554 // Interface to java.lang.StackTraceElement objects
1555
1556 class java_lang_StackTraceElement: AllStatic {
1557 private:
1558 static int _declaringClassObject_offset;
1559 static int _classLoaderName_offset;
1560 static int _moduleName_offset;
1561 static int _moduleVersion_offset;
1562 static int _declaringClass_offset;
1563 static int _methodName_offset;
1564 static int _fileName_offset;
1565 static int _lineNumber_offset;
1566
1567 // Setters
1568 static void set_classLoaderName(oop element, oop value);
1569 static void set_moduleName(oop element, oop value);
1570 static void set_moduleVersion(oop element, oop value);
1571 static void set_declaringClass(oop element, oop value);
1572 static void set_methodName(oop element, oop value);
1573 static void set_fileName(oop element, oop value);
1574 static void set_lineNumber(oop element, int value);
1575 static void set_declaringClassObject(oop element, oop value);
1576
1577 static void decode_file_and_line(Handle java_mirror, InstanceKlass* holder, int version,
1578 const methodHandle& method, int bci,
1579 Symbol*& source, oop& source_file, int& line_number, TRAPS);
1580
1581 public:
1582 // Create an instance of StackTraceElement
1583 static oop create(const methodHandle& method, int bci, TRAPS);
1584
1585 static void fill_in(Handle element, InstanceKlass* holder, const methodHandle& method,
1586 int version, int bci, Symbol* name, TRAPS);
1587
1588 static void compute_offsets();
1589 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1590
1591 #if INCLUDE_JVMCI
1592 static void decode(const methodHandle& method, int bci, Symbol*& fileName, int& lineNumber, TRAPS);
1593 #endif
1594
1595 // Debugging
1596 friend class JavaClasses;
1597 };
1598
1599
1600 class Backtrace: AllStatic {
1601 public:
1602 // Helper backtrace functions to store bci|version together.
1603 static int merge_bci_and_version(int bci, int version);
1604 static int merge_mid_and_cpref(int mid, int cpref);
1605 static int bci_at(unsigned int merged);
1606 static int version_at(unsigned int merged);
1607 static int mid_at(unsigned int merged);
1608 static int cpref_at(unsigned int merged);
1609 static int get_line_number(Method* method, int bci);
1610 static Symbol* get_source_file_name(InstanceKlass* holder, int version);
1611
1612 // Debugging
1613 friend class JavaClasses;
1614 };
1615
1616 class java_lang_ClassFrameInfo: AllStatic {
1617 private:
1618 static int _classOrMemberName_offset;
1619 static int _flags_offset;
1620
1621 public:
1622 static oop classOrMemberName(oop info);
1623 static int flags(oop info);
1624
1625 // Setters
1626 static void init_class(Handle stackFrame, const methodHandle& m);
1627 static void init_method(Handle stackFrame, const methodHandle& m, TRAPS);
1628
1629 static void compute_offsets();
1630 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1631
1632 // Debugging
1633 friend class JavaClasses;
1634 };
1635
1636 // Interface to java.lang.StackFrameInfo objects
1637
1638 #define STACKFRAMEINFO_INJECTED_FIELDS(macro) \
1639 macro(java_lang_StackFrameInfo, version, short_signature, false)
1640
1641 class java_lang_StackFrameInfo: AllStatic {
1642 private:
1643 static int _type_offset;
1644 static int _name_offset;
1645 static int _bci_offset;
1646 static int _version_offset;
1647 static int _contScope_offset;
1648
1649 public:
1650 // Getters
1651 static oop name(oop info);
1652 static oop type(oop info);
1653 static Method* get_method(oop info);
1654
1655 // Setters
1656 static void set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, oop cont, TRAPS);
1657 static void set_name(oop info, oop value);
1658 static void set_type(oop info, oop value);
1659 static void set_bci(oop info, int value);
1660
1661 static void set_version(oop info, short value);
1662 static void set_contScope(oop info, oop value);
1663
1664 static void compute_offsets();
1665 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1666
1667 static void to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS);
1668
1669 // Debugging
1670 friend class JavaClasses;
1671 };
1672
1673 class java_lang_LiveStackFrameInfo: AllStatic {
1674 private:
1675 static int _monitors_offset;
1676 static int _locals_offset;
1677 static int _operands_offset;
1678 static int _mode_offset;
1679
1680 public:
1681 static void set_monitors(oop info, oop value);
1682 static void set_locals(oop info, oop value);
1683 static void set_operands(oop info, oop value);
1684 static void set_mode(oop info, int value);
1685
1686 static void compute_offsets();
1687 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1688
1689 // Debugging
1690 friend class JavaClasses;
1691 };
1692
1693 // Interface to java.lang.reflect.RecordComponent objects
1694
1695 class java_lang_reflect_RecordComponent: AllStatic {
1696 private:
1697 static int _clazz_offset;
1698 static int _name_offset;
1699 static int _type_offset;
1700 static int _accessor_offset;
1701 static int _signature_offset;
1702 static int _annotations_offset;
1703 static int _typeAnnotations_offset;
1704
1705 // Setters
1706 static void set_clazz(oop element, oop value);
1707 static void set_name(oop element, oop value);
1708 static void set_type(oop element, oop value);
1709 static void set_accessor(oop element, oop value);
1710 static void set_signature(oop element, oop value);
1711 static void set_annotations(oop element, oop value);
1712 static void set_typeAnnotations(oop element, oop value);
1713
1714 public:
1715 // Create an instance of RecordComponent
1716 static oop create(InstanceKlass* holder, RecordComponent* component, TRAPS);
1717
1718 static void compute_offsets();
1719 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1720
1721 // Debugging
1722 friend class JavaClasses;
1723 };
1724
1725
1726 // Interface to java.lang.AssertionStatusDirectives objects
1727
1728 class java_lang_AssertionStatusDirectives: AllStatic {
1729 private:
1730 static int _classes_offset;
1731 static int _classEnabled_offset;
1732 static int _packages_offset;
1733 static int _packageEnabled_offset;
1734 static int _deflt_offset;
1735
1736 public:
1737 // Setters
1738 static void set_classes(oop obj, oop val);
1739 static void set_classEnabled(oop obj, oop val);
1740 static void set_packages(oop obj, oop val);
1741 static void set_packageEnabled(oop obj, oop val);
1742 static void set_deflt(oop obj, bool val);
1743
1744 static void compute_offsets();
1745 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1746
1747 // Debugging
1748 friend class JavaClasses;
1749 };
1750
1751
1752 class java_util_concurrent_locks_AbstractOwnableSynchronizer : AllStatic {
1753 private:
1754 static int _owner_offset;
1755 public:
1756 static void compute_offsets();
1757 static oop get_owner_threadObj(oop obj);
1758 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1759 };
1760
1761 // Interface to jdk.internal.misc.UnsafeConsants
1762
1763 class jdk_internal_misc_UnsafeConstants : AllStatic {
1764 public:
1765 static void set_unsafe_constants();
1766 static void compute_offsets() { }
1767 static void serialize_offsets(SerializeClosure* f) { }
1768 };
1769
1770 // Interface to jdk.internal.vm.vector.VectorSupport.VectorPayload objects
1771
1772 class vector_VectorPayload : AllStatic {
1773 private:
1774 static int _payload_offset;
1775 public:
1776 static void set_payload(oop o, oop val);
1777
1778 static void compute_offsets();
1779 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1780
1781 // Testers
1782 static bool is_subclass(Klass* klass) {
1783 return klass->is_subclass_of(vmClasses::vector_VectorPayload_klass());
1784 }
1785 static bool is_instance(oop obj);
1786 };
1787
1788 class java_lang_Integer : AllStatic {
1789 public:
1790 static jint value(oop obj);
1791 };
1792
1793 class java_lang_Long : AllStatic {
1794 public:
1795 static jlong value(oop obj);
1796 };
1797
1798 class java_lang_Character : AllStatic {
1799 public:
1800 static jchar value(oop obj);
1801 };
1802
1803 class java_lang_Short : AllStatic {
1804 public:
1805 static jshort value(oop obj);
1806 };
1807
1808 class java_lang_Byte : AllStatic {
1809 public:
1810 static jbyte value(oop obj);
1811 };
1812
1813 class java_lang_Boolean : AllStatic {
1814 private:
1815 static int _static_TRUE_offset;
1816 static int _static_FALSE_offset;
1817 public:
1818 static Symbol* symbol();
1819 static void compute_offsets(InstanceKlass* k);
1820 static oop get_TRUE(InstanceKlass *k);
1821 static oop get_FALSE(InstanceKlass *k);
1822 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1823 static jboolean value(oop obj);
1824 };
1825
1826 class java_lang_Integer_IntegerCache : AllStatic {
1827 private:
1828 static int _static_cache_offset;
1829 public:
1830 static Symbol* symbol();
1831 static void compute_offsets(InstanceKlass* k);
1832 static objArrayOop cache(InstanceKlass *k);
1833 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1834 };
1835
1836 class java_lang_Long_LongCache : AllStatic {
1837 private:
1838 static int _static_cache_offset;
1839 public:
1840 static Symbol* symbol();
1841 static void compute_offsets(InstanceKlass* k);
1842 static objArrayOop cache(InstanceKlass *k);
1843 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1844 };
1845
1846 class java_lang_Character_CharacterCache : AllStatic {
1847 private:
1848 static int _static_cache_offset;
1849 public:
1850 static Symbol* symbol();
1851 static void compute_offsets(InstanceKlass* k);
1852 static objArrayOop cache(InstanceKlass *k);
1853 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1854 };
1855
1856 class java_lang_Short_ShortCache : AllStatic {
1857 private:
1858 static int _static_cache_offset;
1859 public:
1860 static Symbol* symbol();
1861 static void compute_offsets(InstanceKlass* k);
1862 static objArrayOop cache(InstanceKlass *k);
1863 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1864 };
1865
1866 class java_lang_Byte_ByteCache : AllStatic {
1867 private:
1868 static int _static_cache_offset;
1869 public:
1870 static Symbol* symbol();
1871 static void compute_offsets(InstanceKlass* k);
1872 static objArrayOop cache(InstanceKlass *k);
1873 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1874 };
1875
1876
1877 // Interface to java.lang.InternalError objects
1878
1879 #define INTERNALERROR_INJECTED_FIELDS(macro) \
1880 macro(java_lang_InternalError, during_unsafe_access, bool_signature, false)
1881
1882 class java_lang_InternalError : AllStatic {
1883 private:
1884 static int _during_unsafe_access_offset;
1885 public:
1886 static jboolean during_unsafe_access(oop internal_error);
1887 static void set_during_unsafe_access(oop internal_error);
1888 static void compute_offsets();
1889 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1890 };
1891
1892 // Use to declare fields that need to be injected into Java classes
1893 // for the JVM to use. The name_index and signature_index are
1894 // declared in vmSymbols. The may_be_java flag is used to declare
1895 // fields that might already exist in Java but should be injected if
1896 // they don't. Otherwise the field is unconditionally injected and
1897 // the JVM uses the injected one. This is to ensure that name
1898 // collisions don't occur. In general may_be_java should be false
1899 // unless there's a good reason.
1900
1901 class InjectedField {
1902 public:
1903 const vmClassID klass_id;
1904 const vmSymbolID name_index;
1905 const vmSymbolID signature_index;
1906 const bool may_be_java;
1907
1908
1909 InstanceKlass* klass() const { return vmClasses::klass_at(klass_id); }
1910 Symbol* name() const { return lookup_symbol(name_index); }
1911 Symbol* signature() const { return lookup_symbol(signature_index); }
1912
1913 int compute_offset();
1914
1915 // Find the Symbol for this index
1916 static Symbol* lookup_symbol(vmSymbolID symbol_index) {
1917 return Symbol::vm_symbol_at(symbol_index);
1918 }
1919 };
1920
1921
1922 // Interface to hard-coded offset checking
1923
1924 enum class InjectedFieldID : int;
1925
1926 class JavaClasses : AllStatic {
1927 private:
1928
1929 static InjectedField _injected_fields[];
1930
1931 static bool check_offset(const char *klass_name, int offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1932 public:
1933
1934 static int compute_injected_offset(InjectedFieldID id);
1935
1936 static void compute_offsets();
1937 static void check_offsets() PRODUCT_RETURN;
1938 static void serialize_offsets(SerializeClosure* soc) NOT_CDS_RETURN;
1939 static InjectedField* get_injected(Symbol* class_name, int* field_count);
1940 static bool is_supported_for_archiving(oop obj) NOT_CDS_JAVA_HEAP_RETURN_(false);
1941
1942 static void compute_offset(int &dest_offset,
1943 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol,
1944 bool is_static = false);
1945 static void compute_offset(int& dest_offset, InstanceKlass* ik,
1946 const char* name_string, Symbol* signature_symbol,
1947 bool is_static = false);
1948 };
1949
1950 #undef CHECK_INIT
1951
1952 #endif // SHARE_CLASSFILE_JAVACLASSES_HPP