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/vmEnums.hpp"
36
37 class JvmtiThreadState;
38 class RecordComponent;
39 class SerializeClosure;
40
41 #define CHECK_INIT(offset) assert(offset != 0, "should be initialized"); return offset;
42
43 // Interface to java.lang.Object objects
44
45 class java_lang_Object : AllStatic {
46 public:
47 static void register_natives(TRAPS);
48 };
49
50 // Interface to java.lang.String objects
51
52 // The flags field is a collection of bits representing boolean values used
53 // internally by the VM.
54 #define STRING_INJECTED_FIELDS(macro) \
55 macro(java_lang_String, flags, byte_signature, false)
56
57 class java_lang_String : AllStatic {
58 private:
59 static int _value_offset;
60 static int _hash_offset;
61 static int _hashIsZero_offset;
62 static int _coder_offset;
63 static int _flags_offset;
64
65 static bool _initialized;
66
67 static Handle basic_create(int length, bool byte_arr, TRAPS);
68
69 static inline void set_coder(oop string, jbyte coder);
70
71 // Bitmasks for values in the injected flags field.
72 static const uint8_t _deduplication_forbidden_mask = 1 << 0;
73 static const uint8_t _deduplication_requested_mask = 1 << 1;
74
75 static int flags_offset() { CHECK_INIT(_flags_offset); }
76 // Return the address of the injected flags field.
77 static inline uint8_t* flags_addr(oop java_string);
78 // Test whether the designated bit of the injected flags field is set.
79 static inline bool is_flag_set(oop java_string, uint8_t flag_mask);
80 // Atomically test and set the designated bit of the injected flags field,
81 // returning true if the bit was already set.
82 static bool test_and_set_flag(oop java_string, uint8_t flag_mask);
83
84 static inline unsigned int hash_code_impl(oop java_string, bool update);
85
86 public:
87
88 // Coders
89 enum Coder {
90 CODER_LATIN1 = 0,
91 CODER_UTF16 = 1
92 };
93
94 static void compute_offsets();
95 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
96
97 // Instance creation
98 static Handle create_from_unicode(const jchar* unicode, int len, TRAPS);
99 static oop create_oop_from_unicode(const jchar* unicode, int len, TRAPS);
100 static Handle create_from_str(const char* utf8_str, TRAPS);
101 static oop create_oop_from_str(const char* utf8_str, TRAPS);
102 static Handle create_from_symbol(Symbol* symbol, TRAPS);
103 static Handle create_from_platform_dependent_str(const char* str, TRAPS);
104
105 static void set_compact_strings(bool value);
106
107 static int value_offset() { CHECK_INIT(_value_offset); }
108 static int coder_offset() { CHECK_INIT(_coder_offset); }
109
110 static inline void set_value(oop string, typeArrayOop buffer);
111
112 // Set the deduplication_forbidden flag true. This flag is sticky; once
113 // set it never gets cleared. This is set when a String is interned in
114 // the StringTable, to prevent string deduplication from changing the
115 // String's value array.
116 static inline void set_deduplication_forbidden(oop java_string);
117
118 // Test and set the deduplication_requested flag. Returns the old value
119 // of the flag. This flag is sticky; once set it never gets cleared.
120 // Some GCs may use this flag when deciding whether to request
121 // deduplication of a String, to avoid multiple requests for the same
122 // object.
123 static inline bool test_and_set_deduplication_requested(oop java_string);
124
125 // Accessors
126 static inline typeArrayOop value(oop java_string);
127 static inline typeArrayOop value_no_keepalive(oop java_string);
128 static inline bool hash_is_set(oop string);
129 static inline bool is_latin1(oop java_string);
130 static inline bool deduplication_forbidden(oop java_string);
131 static inline bool deduplication_requested(oop java_string);
132 static inline int length(oop java_string);
133 static inline int length(oop java_string, typeArrayOop string_value);
134 static int utf8_length(oop java_string);
135 static int utf8_length(oop java_string, typeArrayOop string_value);
136
137 // String converters
138 static char* as_utf8_string(oop java_string);
139 static char* as_utf8_string(oop java_string, int& length);
140 static char* as_utf8_string_full(oop java_string, char* buf, int buflen, int& length);
141 static char* as_utf8_string(oop java_string, char* buf, int buflen);
142 static char* as_utf8_string(oop java_string, int start, int len);
143 static char* as_utf8_string(oop java_string, typeArrayOop value, char* buf, int buflen);
144 static char* as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, int buflen);
145 static char* as_platform_dependent_str(Handle java_string, TRAPS);
146 static jchar* as_unicode_string(oop java_string, int& length, TRAPS);
147 static jchar* as_unicode_string_or_null(oop java_string, int& length);
148 // produce an ascii string with all other values quoted using \u####
149 static char* as_quoted_ascii(oop java_string);
150
151 // Compute the hash value for a java.lang.String object which would
152 // contain the characters passed in.
153 //
154 // As the hash value used by the String object itself, in
155 // String.hashCode(). This value is normally calculated in Java code
156 // in the String.hashCode method(), but is precomputed for String
157 // objects in the shared archive file.
158 // hash P(31) from Kernighan & Ritchie
159 //
160 // For this reason, THIS ALGORITHM MUST MATCH String.hashCode().
161 static unsigned int hash_code(const jchar* s, int len) {
162 unsigned int h = 0;
163 while (len-- > 0) {
164 h = 31*h + (unsigned int) *s;
165 s++;
166 }
167 return h;
168 }
169
170 static unsigned int hash_code(const jbyte* s, int len) {
171 unsigned int h = 0;
172 while (len-- > 0) {
173 h = 31*h + (((unsigned int) *s) & 0xFF);
174 s++;
175 }
176 return h;
177 }
178
179 static unsigned int hash_code(oop java_string);
180 static unsigned int hash_code_noupdate(oop java_string);
181
182 static bool equals(oop java_string, const jchar* chars, int len);
183 static bool equals(oop str1, oop str2);
184 static inline bool value_equals(typeArrayOop str_value1, typeArrayOop str_value2);
185
186 // Conversion between '.' and '/' formats, and allocate a String from the result.
187 static Handle externalize_classname(Symbol* java_name, TRAPS);
188
189 // Conversion
190 static Symbol* as_symbol(oop java_string);
191 static Symbol* as_symbol_or_null(oop java_string);
192
193 // Tester
194 static inline bool is_instance(oop obj);
195
196 // Debugging
197 static void print(oop java_string, outputStream* st, int max_length = MaxStringPrintSize);
198 friend class JavaClasses;
199 friend class StringTable;
200 };
201
202
203 // Interface to java.lang.Class objects
204
205 #define CLASS_INJECTED_FIELDS(macro) \
206 macro(java_lang_Class, klass, intptr_signature, false) \
207 macro(java_lang_Class, array_klass, intptr_signature, false) \
208 macro(java_lang_Class, oop_size, int_signature, false) \
209 macro(java_lang_Class, static_oop_field_count, int_signature, false) \
210 macro(java_lang_Class, protection_domain, object_signature, false) \
211 macro(java_lang_Class, source_file, object_signature, false) \
212 macro(java_lang_Class, init_lock, object_signature, false)
213
214 class java_lang_Class : AllStatic {
215 friend class VMStructs;
216 friend class JVMCIVMStructs;
217
218 private:
219
220 // The fake offsets are added by the class loader when java.lang.Class is loaded
221
222 static int _klass_offset;
223 static int _array_klass_offset;
224
225 static int _oop_size_offset;
226 static int _static_oop_field_count_offset;
227
228 static int _protection_domain_offset;
229 static int _init_lock_offset;
230 static int _signers_offset;
231 static int _class_loader_offset;
232 static int _module_offset;
233 static int _component_mirror_offset;
234 static int _name_offset;
235 static int _source_file_offset;
236 static int _classData_offset;
237 static int _classRedefinedCount_offset;
238
239 static bool _offsets_computed;
240
241 static GrowableArray<Klass*>* _fixup_mirror_list;
242 static GrowableArray<Klass*>* _fixup_module_field_list;
243
244 static void set_init_lock(oop java_class, oop init_lock);
245 static void set_protection_domain(oop java_class, oop protection_domain);
246 static void set_class_loader(oop java_class, oop class_loader);
247 static void set_component_mirror(oop java_class, oop comp_mirror);
248 static void initialize_mirror_fields(Klass* k, Handle mirror, Handle protection_domain,
249 Handle classData, TRAPS);
250 static void set_mirror_module_field(JavaThread* current, Klass* K, Handle mirror, Handle module);
251 public:
252 static void allocate_fixup_lists();
253 static void compute_offsets();
254
255 // Instance creation
256 static void allocate_mirror(Klass* k, bool is_scratch, Handle protection_domain, Handle classData,
257 Handle& mirror, Handle& comp_mirror, TRAPS); // returns mirror and comp_mirror
258 static void create_mirror(Klass* k, Handle class_loader, Handle module,
259 Handle protection_domain, Handle classData, TRAPS);
260 static void fixup_mirror(Klass* k, TRAPS);
261 static oop create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS);
262
263 // Archiving
264 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
265 static void create_scratch_mirror(Klass* k, TRAPS) NOT_CDS_JAVA_HEAP_RETURN;
266 static bool restore_archived_mirror(Klass *k, Handle class_loader, Handle module,
267 Handle protection_domain,
268 TRAPS) NOT_CDS_JAVA_HEAP_RETURN_(false);
269
270 static void fixup_module_field(Klass* k, Handle module);
271
272 // Conversion
273 static Klass* as_Klass(oop java_class);
274 static void set_klass(oop java_class, Klass* klass);
275 static BasicType as_BasicType(oop java_class, Klass** reference_klass = nullptr);
276 static Symbol* as_signature(oop java_class, bool intern_if_not_found);
277 static void print_signature(oop java_class, outputStream *st);
278 static const char* as_external_name(oop java_class);
279 // Testing
280 static bool is_instance(oop obj);
281
282 static bool is_primitive(oop java_class);
283 static BasicType primitive_type(oop java_class);
284 static oop primitive_mirror(BasicType t);
285 // JVM_NewArray support
286 static Klass* array_klass_acquire(oop java_class);
287 static void release_set_array_klass(oop java_class, Klass* klass);
288 // compiler support for class operations
289 static int klass_offset() { CHECK_INIT(_klass_offset); }
290 static int array_klass_offset() { CHECK_INIT(_array_klass_offset); }
291 // Support for classRedefinedCount field
292 static int classRedefinedCount(oop the_class_mirror);
293 static void set_classRedefinedCount(oop the_class_mirror, int value);
294
295 // Support for embedded per-class oops
296 static oop protection_domain(oop java_class);
297 static oop init_lock(oop java_class);
298 static void clear_init_lock(oop java_class) {
299 set_init_lock(java_class, nullptr);
300 }
301 static oop component_mirror(oop java_class);
302 static objArrayOop signers(oop java_class);
303 static oop class_data(oop java_class);
304 static void set_class_data(oop java_class, oop classData);
305
306 static int component_mirror_offset() { return _component_mirror_offset; }
307
308 static oop class_loader(oop java_class);
309 static void set_module(oop java_class, oop module);
310 static oop module(oop java_class);
311
312 static oop name(Handle java_class, TRAPS);
313
314 static oop source_file(oop java_class);
315 static void set_source_file(oop java_class, oop source_file);
316
317 static size_t oop_size(oop java_class);
318 static void set_oop_size(HeapWord* java_class, size_t size);
319 static int static_oop_field_count(oop java_class);
320 static void set_static_oop_field_count(oop java_class, int size);
321
322 static GrowableArray<Klass*>* fixup_mirror_list() {
323 return _fixup_mirror_list;
324 }
325 static void set_fixup_mirror_list(GrowableArray<Klass*>* v) {
326 _fixup_mirror_list = v;
327 }
328
329 static GrowableArray<Klass*>* fixup_module_field_list() {
330 return _fixup_module_field_list;
331 }
332 static void set_fixup_module_field_list(GrowableArray<Klass*>* v) {
333 _fixup_module_field_list = v;
334 }
335
336 // Debugging
337 friend class JavaClasses;
338 };
339
340 // Interface to java.lang.Thread objects
341
342 #define THREAD_INJECTED_FIELDS(macro) \
343 macro(java_lang_Thread, jvmti_thread_state, intptr_signature, false) \
344 macro(java_lang_Thread, jvmti_VTMS_transition_disable_count, int_signature, false) \
345 macro(java_lang_Thread, jvmti_is_in_VTMS_transition, bool_signature, false) \
346 JFR_ONLY(macro(java_lang_Thread, jfr_epoch, short_signature, false))
347
348 class java_lang_Thread : AllStatic {
349 friend class java_lang_VirtualThread;
350 friend class JVMCIVMStructs;
351 private:
352 // Note that for this class the layout changed between JDK1.2 and JDK1.3,
353 // so we compute the offsets at startup rather than hard-wiring them.
354 static int _holder_offset;
355 static int _name_offset;
356 static int _contextClassLoader_offset;
357 static int _inheritedAccessControlContext_offset;
358 static int _eetop_offset;
359 static int _jvmti_thread_state_offset;
360 static int _jvmti_VTMS_transition_disable_count_offset;
361 static int _jvmti_is_in_VTMS_transition_offset;
362 static int _interrupted_offset;
363 static int _interruptLock_offset;
364 static int _tid_offset;
365 static int _continuation_offset;
366 static int _park_blocker_offset;
367 static int _scopedValueBindings_offset;
368 JFR_ONLY(static int _jfr_epoch_offset;)
369
370 static void compute_offsets();
371
372 public:
373 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
374
375 // Returns the JavaThread associated with the thread obj
376 static JavaThread* thread(oop java_thread);
377 static JavaThread* thread_acquire(oop java_thread);
378 // Set JavaThread for instance
379 static void set_thread(oop java_thread, JavaThread* thread);
380 static void release_set_thread(oop java_thread, JavaThread* thread);
381 // FieldHolder
382 static oop holder(oop java_thread);
383 // interruptLock
384 static oop interrupt_lock(oop java_thread);
385 // Interrupted status
386 static bool interrupted(oop java_thread);
387 static void set_interrupted(oop java_thread, bool val);
388 // Name
389 static oop name(oop java_thread);
390 static void set_name(oop java_thread, oop name);
391 // Priority
392 static ThreadPriority priority(oop java_thread);
393 static void set_priority(oop java_thread, ThreadPriority priority);
394 // Thread group
395 static oop threadGroup(oop java_thread);
396 // Alive (NOTE: this is not really a field, but provides the correct
397 // definition without doing a Java call)
398 static bool is_alive(oop java_thread);
399 // Daemon
400 static bool is_daemon(oop java_thread);
401 static void set_daemon(oop java_thread);
402 // Context ClassLoader
403 static oop context_class_loader(oop java_thread);
404 // Control context
405 static oop inherited_access_control_context(oop java_thread);
406 // Stack size hint
407 static jlong stackSize(oop java_thread);
408 // Thread ID
409 static int64_t thread_id(oop java_thread);
410 static ByteSize thread_id_offset();
411 // Continuation
412 static inline oop continuation(oop java_thread);
413
414 static JvmtiThreadState* jvmti_thread_state(oop java_thread);
415 static void set_jvmti_thread_state(oop java_thread, JvmtiThreadState* state);
416 static int VTMS_transition_disable_count(oop java_thread);
417 static void inc_VTMS_transition_disable_count(oop java_thread);
418 static void dec_VTMS_transition_disable_count(oop java_thread);
419 static bool is_in_VTMS_transition(oop java_thread);
420 static void set_is_in_VTMS_transition(oop java_thread, bool val);
421 static int is_in_VTMS_transition_offset();
422
423 // Clear all scoped value bindings on error
424 static void clear_scopedValueBindings(oop java_thread);
425
426 // Blocker object responsible for thread parking
427 static oop park_blocker(oop java_thread);
428
429 // Write thread status info to threadStatus field of java.lang.Thread.
430 static void set_thread_status(oop java_thread_oop, JavaThreadStatus status);
431 // Read thread status info from threadStatus field of java.lang.Thread.
432 static JavaThreadStatus get_thread_status(oop java_thread_oop);
433
434 static const char* thread_status_name(oop java_thread_oop);
435
436 // Fill in current stack trace, can cause GC
437 static oop async_get_stack_trace(oop java_thread, TRAPS);
438
439 JFR_ONLY(static u2 jfr_epoch(oop java_thread);)
440 JFR_ONLY(static void set_jfr_epoch(oop java_thread, u2 epoch);)
441 JFR_ONLY(static int jfr_epoch_offset() { CHECK_INIT(_jfr_epoch_offset); })
442
443 // Debugging
444 friend class JavaClasses;
445 };
446
447 // Interface to java.lang.Thread$FieldHolder objects
448
449 class java_lang_Thread_FieldHolder : AllStatic {
450 private:
451 static int _group_offset;
452 static int _priority_offset;
453 static int _stackSize_offset;
454 static int _daemon_offset;
455 static int _thread_status_offset;
456
457 static void compute_offsets();
458
459 public:
460 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
461
462 static oop threadGroup(oop holder);
463
464 static ThreadPriority priority(oop holder);
465 static void set_priority(oop holder, ThreadPriority priority);
466
467 static jlong stackSize(oop holder);
468
469 static bool is_daemon(oop holder);
470 static void set_daemon(oop holder, bool val);
471
472 static void set_thread_status(oop holder, JavaThreadStatus status);
473 static JavaThreadStatus get_thread_status(oop holder);
474
475 friend class JavaClasses;
476 };
477
478 // Interface to java.lang.Thread$Constants objects
479
480 class java_lang_Thread_Constants : AllStatic {
481 private:
482 static int _static_VTHREAD_GROUP_offset;
483 static int _static_NOT_SUPPORTED_CLASSLOADER_offset;
484
485 static void compute_offsets();
486 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
487
488 public:
489 static oop get_VTHREAD_GROUP();
490
491 friend class JavaClasses;
492 };
493
494 // Interface to java.lang.ThreadGroup objects
495
496 class java_lang_ThreadGroup : AllStatic {
497 private:
498 static int _parent_offset;
499 static int _name_offset;
500 static int _maxPriority_offset;
501 static int _daemon_offset;
502
503 static void compute_offsets();
504 public:
505 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
506
507 // parent ThreadGroup
508 static oop parent(oop java_thread_group);
509 // name
510 static const char* name(oop java_thread_group);
511 // maxPriority in group
512 static ThreadPriority maxPriority(oop java_thread_group);
513 // Daemon
514 static bool is_daemon(oop java_thread_group);
515
516 // Debugging
517 friend class JavaClasses;
518 };
519
520
521 // Interface to java.lang.VirtualThread objects
522
523 class java_lang_VirtualThread : AllStatic {
524 private:
525 static int static_vthread_scope_offset;
526 static int _carrierThread_offset;
527 static int _continuation_offset;
528 static int _state_offset;
529 JFR_ONLY(static int _jfr_epoch_offset;)
530 public:
531 enum {
532 NEW = 0,
533 STARTED = 1,
534 RUNNING = 2,
535 PARKING = 3,
536 PARKED = 4,
537 PINNED = 5,
538 TIMED_PARKING = 6,
539 TIMED_PARKED = 7,
540 TIMED_PINNED = 8,
541 UNPARKED = 9,
542 YIELDING = 10,
543 YIELDED = 11,
544 TERMINATED = 99,
545
546 // additional state bits
547 SUSPENDED = 1 << 8, // suspended when unmounted
548 };
549
550 static void compute_offsets();
551 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
552
553 // Testers
554 static bool is_subclass(Klass* klass) {
555 return klass->is_subclass_of(vmClasses::VirtualThread_klass());
556 }
557 static bool is_instance(oop obj);
558
559 static oop vthread_scope();
560 static oop carrier_thread(oop vthread);
561 static oop continuation(oop vthread);
562 static int state(oop vthread);
563 static JavaThreadStatus map_state_to_thread_status(int state);
564 };
565
566
567 // Interface to java.lang.Throwable objects
568
569 class java_lang_Throwable: AllStatic {
570 friend class BacktraceBuilder;
571 friend class BacktraceIterator;
572
573 private:
574 // Trace constants
575 enum {
576 trace_methods_offset = 0,
577 trace_bcis_offset = 1,
578 trace_mirrors_offset = 2,
579 trace_names_offset = 3,
580 trace_conts_offset = 4,
581 trace_next_offset = 5,
582 trace_hidden_offset = 6,
583 trace_size = 7,
584 trace_chunk_size = 32
585 };
586
587 static int _backtrace_offset;
588 static int _detailMessage_offset;
589 static int _stackTrace_offset;
590 static int _depth_offset;
591 static int _cause_offset;
592 static int _static_unassigned_stacktrace_offset;
593
594 // StackTrace (programmatic access, new since 1.4)
595 static void clear_stacktrace(oop throwable);
596 // Stacktrace (post JDK 1.7.0 to allow immutability protocol to be followed)
597 static void set_stacktrace(oop throwable, oop st_element_array);
598 static oop unassigned_stacktrace();
599
600 public:
601 // Backtrace
602 static oop backtrace(oop throwable);
603 static void set_backtrace(oop throwable, oop value);
604 static int depth(oop throwable);
605 static void set_depth(oop throwable, int value);
606 // Message
607 static int get_detailMessage_offset() { CHECK_INIT(_detailMessage_offset); }
608 static oop message(oop throwable);
609 static const char* message_as_utf8(oop throwable);
610 static void set_message(oop throwable, oop value);
611
612 static oop cause(oop throwable);
613
614 static void print_stack_element(outputStream *st, Method* method, int bci);
615
616 static void compute_offsets();
617 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
618
619 // Allocate space for backtrace (created but stack trace not filled in)
620 static void allocate_backtrace(Handle throwable, TRAPS);
621 // Fill in current stack trace for throwable with preallocated backtrace (no GC)
622 static void fill_in_stack_trace_of_preallocated_backtrace(Handle throwable);
623 // Fill in current stack trace, can cause GC
624 static void fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS);
625 static void fill_in_stack_trace(Handle throwable, const methodHandle& method = methodHandle());
626
627 // Programmatic access to stack trace
628 static void get_stack_trace_elements(int depth, Handle backtrace, objArrayHandle stack_trace, TRAPS);
629
630 // For recreating class initialization error exceptions.
631 static Handle create_initialization_error(JavaThread* current, Handle throwable);
632
633 // Printing
634 static void print(oop throwable, outputStream* st);
635 static void print_stack_trace(Handle throwable, outputStream* st);
636 static void java_printStackTrace(Handle throwable, TRAPS);
637 // Debugging
638 friend class JavaClasses;
639 // Gets the method and bci of the top frame (TOS). Returns false if this failed.
640 static bool get_top_method_and_bci(oop throwable, Method** method, int* bci);
641 };
642
643
644 // Interface to java.lang.reflect.AccessibleObject objects
645
646 class java_lang_reflect_AccessibleObject: AllStatic {
647 private:
648 // Note that to reduce dependencies on the JDK we compute these
649 // offsets at run-time.
650 static int _override_offset;
651
652 static void compute_offsets();
653
654 public:
655 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
656
657 // Accessors
658 static jboolean override(oop reflect);
659 static void set_override(oop reflect, jboolean value);
660
661 // Debugging
662 friend class JavaClasses;
663 };
664
665
666 // Interface to java.lang.reflect.Method objects
667
668 class java_lang_reflect_Method : public java_lang_reflect_AccessibleObject {
669 private:
670 // Note that to reduce dependencies on the JDK we compute these
671 // offsets at run-time.
672 static int _clazz_offset;
673 static int _name_offset;
674 static int _returnType_offset;
675 static int _parameterTypes_offset;
676 static int _exceptionTypes_offset;
677 static int _slot_offset;
678 static int _modifiers_offset;
679 static int _signature_offset;
680 static int _annotations_offset;
681 static int _parameter_annotations_offset;
682 static int _annotation_default_offset;
683
684 static void compute_offsets();
685 public:
686 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
687
688 // Allocation
689 static Handle create(TRAPS);
690
691 // Accessors
692 static oop clazz(oop reflect);
693 static void set_clazz(oop reflect, oop value);
694
695 static void set_name(oop method, oop value);
696
697 static oop return_type(oop method);
698 static void set_return_type(oop method, oop value);
699
700 static oop parameter_types(oop method);
701 static void set_parameter_types(oop method, oop value);
702
703 static int slot(oop reflect);
704 static void set_slot(oop reflect, int value);
705
706 static void set_exception_types(oop method, oop value);
707 static void set_modifiers(oop method, int value);
708 static void set_signature(oop method, oop value);
709 static void set_annotations(oop method, oop value);
710 static void set_parameter_annotations(oop method, oop value);
711 static void set_annotation_default(oop method, oop value);
712
713 // Debugging
714 friend class JavaClasses;
715 };
716
717
718 // Interface to java.lang.reflect.Constructor objects
719
720 class java_lang_reflect_Constructor : public java_lang_reflect_AccessibleObject {
721 private:
722 // Note that to reduce dependencies on the JDK we compute these
723 // offsets at run-time.
724 static int _clazz_offset;
725 static int _parameterTypes_offset;
726 static int _exceptionTypes_offset;
727 static int _slot_offset;
728 static int _modifiers_offset;
729 static int _signature_offset;
730 static int _annotations_offset;
731 static int _parameter_annotations_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 oop parameter_types(oop constructor);
745 static void set_parameter_types(oop constructor, oop value);
746
747 static int slot(oop reflect);
748 static void set_slot(oop reflect, int value);
749
750 static void set_exception_types(oop constructor, oop value);
751 static void set_modifiers(oop constructor, int value);
752 static void set_signature(oop constructor, oop value);
753 static void set_annotations(oop constructor, oop value);
754 static void set_parameter_annotations(oop method, oop value);
755
756 // Debugging
757 friend class JavaClasses;
758 };
759
760
761 // Interface to java.lang.reflect.Field objects
762
763 class java_lang_reflect_Field : public java_lang_reflect_AccessibleObject {
764 private:
765 // Note that to reduce dependencies on the JDK we compute these
766 // offsets at run-time.
767 static int _clazz_offset;
768 static int _name_offset;
769 static int _type_offset;
770 static int _slot_offset;
771 static int _modifiers_offset;
772 static int _trusted_final_offset;
773 static int _signature_offset;
774 static int _annotations_offset;
775
776 static void compute_offsets();
777
778 public:
779 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
780
781 // Allocation
782 static Handle create(TRAPS);
783
784 // Accessors
785 static oop clazz(oop reflect);
786 static void set_clazz(oop reflect, oop value);
787
788 static oop name(oop field);
789 static void set_name(oop field, oop value);
790
791 static oop type(oop field);
792 static void set_type(oop field, oop value);
793
794 static int slot(oop reflect);
795 static void set_slot(oop reflect, int value);
796
797 static int modifiers(oop field);
798 static void set_modifiers(oop field, int value);
799
800 static void set_trusted_final(oop field);
801
802 static void set_signature(oop constructor, oop value);
803 static void set_annotations(oop constructor, oop value);
804
805 // Debugging
806 friend class JavaClasses;
807 };
808
809 class java_lang_reflect_Parameter {
810 private:
811 // Note that to reduce dependencies on the JDK we compute these
812 // offsets at run-time.
813 static int _name_offset;
814 static int _modifiers_offset;
815 static int _index_offset;
816 static int _executable_offset;
817
818 static void compute_offsets();
819
820 public:
821 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
822
823 // Allocation
824 static Handle create(TRAPS);
825
826 // Accessors
827 static oop name(oop field);
828 static void set_name(oop field, oop value);
829
830 static int index(oop reflect);
831 static void set_index(oop reflect, int value);
832
833 static int modifiers(oop reflect);
834 static void set_modifiers(oop reflect, int value);
835
836 static oop executable(oop constructor);
837 static void set_executable(oop constructor, oop value);
838
839 friend class JavaClasses;
840 };
841
842 #define MODULE_INJECTED_FIELDS(macro) \
843 macro(java_lang_Module, module_entry, intptr_signature, false)
844
845 class java_lang_Module {
846 private:
847 static int _loader_offset;
848 static int _name_offset;
849 static int _module_entry_offset;
850
851 static void compute_offsets();
852
853 public:
854 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
855
856 // Allocation
857 static Handle create(Handle loader, Handle module_name, TRAPS);
858
859 // Testers
860 static bool is_instance(oop obj);
861
862 // Accessors
863 static oop loader(oop module);
864 static void set_loader(oop module, oop value);
865
866 // CDS
867 static int module_entry_offset() { return _module_entry_offset; }
868
869 static oop name(oop module);
870 static void set_name(oop module, oop value);
871
872 static ModuleEntry* module_entry(oop module);
873 static ModuleEntry* module_entry_raw(oop module);
874 static void set_module_entry(oop module, ModuleEntry* module_entry);
875
876 friend class JavaClasses;
877 };
878
879 // Interface to jdk.internal.reflect.ConstantPool objects
880 class reflect_ConstantPool {
881 private:
882 // Note that to reduce dependencies on the JDK we compute these
883 // offsets at run-time.
884 static int _oop_offset;
885
886 static void compute_offsets();
887
888 public:
889 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
890
891 // Allocation
892 static Handle create(TRAPS);
893
894 // Accessors
895 static void set_cp(oop reflect, ConstantPool* value);
896 static int oop_offset() { CHECK_INIT(_oop_offset); }
897
898 static ConstantPool* get_cp(oop reflect);
899
900 // Debugging
901 friend class JavaClasses;
902 };
903
904
905 // Interface to java.lang primitive type boxing objects:
906 // - java.lang.Boolean
907 // - java.lang.Character
908 // - java.lang.Float
909 // - java.lang.Double
910 // - java.lang.Byte
911 // - java.lang.Short
912 // - java.lang.Integer
913 // - java.lang.Long
914
915 // This could be separated out into 8 individual classes.
916
917 class java_lang_boxing_object: AllStatic {
918 private:
919 static int _value_offset;
920 static int _long_value_offset;
921
922 static void compute_offsets();
923 static oop initialize_and_allocate(BasicType type, TRAPS);
924 public:
925 // Allocation. Returns a boxed value, or null for invalid type.
926 static oop create(BasicType type, jvalue* value, TRAPS);
927 // Accessors. Returns the basic type being boxed, or T_ILLEGAL for invalid oop.
928 static BasicType get_value(oop box, jvalue* value);
929 static BasicType set_value(oop box, jvalue* value);
930 static BasicType basic_type(oop box);
931 static bool is_instance(oop box) { return basic_type(box) != T_ILLEGAL; }
932 static bool is_instance(oop box, BasicType type) { return basic_type(box) == type; }
933 static void print(oop box, outputStream* st) { jvalue value; print(get_value(box, &value), &value, st); }
934 static void print(BasicType type, jvalue* value, outputStream* st);
935
936 static int value_offset(BasicType type) {
937 return is_double_word_type(type) ? _long_value_offset : _value_offset;
938 }
939
940 static void serialize_offsets(SerializeClosure* f);
941
942 // Debugging
943 friend class JavaClasses;
944 };
945
946
947
948 // Interface to java.lang.ref.Reference objects
949
950 class java_lang_ref_Reference: AllStatic {
951 static int _referent_offset;
952 static int _queue_offset;
953 static int _next_offset;
954 static int _discovered_offset;
955
956 static bool _offsets_initialized;
957
958 public:
959 // Accessors
960 static inline oop weak_referent_no_keepalive(oop ref);
961 static inline oop weak_referent(oop ref);
962 static inline oop phantom_referent_no_keepalive(oop ref);
963 static inline oop unknown_referent_no_keepalive(oop ref);
964 static inline void clear_referent(oop ref);
965 static inline void clear_referent_raw(oop ref);
966 static inline HeapWord* referent_addr_raw(oop ref);
967 static inline oop next(oop ref);
968 static inline void set_next(oop ref, oop value);
969 static inline void set_next_raw(oop ref, oop value);
970 static inline HeapWord* next_addr_raw(oop ref);
971 static inline oop discovered(oop ref);
972 static inline void set_discovered(oop ref, oop value);
973 static inline void set_discovered_raw(oop ref, oop value);
974 static inline HeapWord* discovered_addr_raw(oop ref);
975 static bool is_referent_field(oop obj, ptrdiff_t offset);
976 static inline bool is_final(oop ref);
977 static inline bool is_phantom(oop ref);
978 static inline bool is_weak(oop ref);
979 static inline bool is_soft(oop ref);
980
981 static int referent_offset() { CHECK_INIT(_referent_offset); }
982 static int queue_offset() { CHECK_INIT(_queue_offset); }
983 static int next_offset() { CHECK_INIT(_next_offset); }
984 static int discovered_offset() { CHECK_INIT(_discovered_offset); }
985
986 static void compute_offsets();
987 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
988 };
989
990
991 // Interface to java.lang.ref.SoftReference objects
992
993 class java_lang_ref_SoftReference: public java_lang_ref_Reference {
994 static int _timestamp_offset;
995 static int _static_clock_offset;
996
997 public:
998 // Accessors
999 static jlong timestamp(oop ref);
1000
1001 // Accessors for statics
1002 static jlong clock();
1003 static void set_clock(jlong value);
1004
1005 static void compute_offsets();
1006 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1007 };
1008
1009 // Interface to java.lang.invoke.MethodHandle objects
1010
1011 class java_lang_invoke_MethodHandle: AllStatic {
1012 friend class JavaClasses;
1013
1014 private:
1015 static int _type_offset; // the MethodType of this MH
1016 static int _form_offset; // the LambdaForm of this MH
1017
1018 static void compute_offsets();
1019
1020 public:
1021 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1022
1023 // Accessors
1024 static oop type(oop mh);
1025 static void set_type(oop mh, oop mtype);
1026
1027 static oop form(oop mh);
1028 static void set_form(oop mh, oop lform);
1029
1030 // Testers
1031 static bool is_subclass(Klass* klass) {
1032 return klass->is_subclass_of(vmClasses::MethodHandle_klass());
1033 }
1034 static bool is_instance(oop obj);
1035
1036 // Accessors for code generation:
1037 static int type_offset() { CHECK_INIT(_type_offset); }
1038 static int form_offset() { CHECK_INIT(_form_offset); }
1039 };
1040
1041 // Interface to java.lang.invoke.DirectMethodHandle objects
1042
1043 class java_lang_invoke_DirectMethodHandle: AllStatic {
1044 friend class JavaClasses;
1045
1046 private:
1047 static int _member_offset; // the MemberName of this DMH
1048
1049 static void compute_offsets();
1050
1051 public:
1052 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1053
1054 // Accessors
1055 static oop member(oop mh);
1056
1057 // Testers
1058 static bool is_subclass(Klass* klass) {
1059 return klass->is_subclass_of(vmClasses::DirectMethodHandle_klass());
1060 }
1061 static bool is_instance(oop obj);
1062
1063 // Accessors for code generation:
1064 static int member_offset() { CHECK_INIT(_member_offset); }
1065 };
1066
1067 // Interface to java.lang.invoke.LambdaForm objects
1068 // (These are a private interface for managing adapter code generation.)
1069
1070 class java_lang_invoke_LambdaForm: AllStatic {
1071 friend class JavaClasses;
1072
1073 private:
1074 static int _vmentry_offset; // type is MemberName
1075
1076 static void compute_offsets();
1077
1078 public:
1079 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1080
1081 // Accessors
1082 static oop vmentry(oop lform);
1083
1084 // Testers
1085 static bool is_subclass(Klass* klass) {
1086 return vmClasses::LambdaForm_klass() != nullptr &&
1087 klass->is_subclass_of(vmClasses::LambdaForm_klass());
1088 }
1089 static bool is_instance(oop obj);
1090
1091 // Accessors for code generation:
1092 static int vmentry_offset() { CHECK_INIT(_vmentry_offset); }
1093 };
1094
1095 // Interface to java.lang.invoke.NativeEntryPoint objects
1096 // (These are a private interface for managing adapter code generation.)
1097
1098 class jdk_internal_foreign_abi_NativeEntryPoint: AllStatic {
1099 friend class JavaClasses;
1100
1101 private:
1102 static int _method_type_offset;
1103 static int _downcall_stub_address_offset;
1104
1105 static void compute_offsets();
1106
1107 public:
1108 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1109
1110 // Accessors
1111 static oop method_type(oop entry);
1112 static jlong downcall_stub_address(oop entry);
1113
1114 // Testers
1115 static bool is_subclass(Klass* klass) {
1116 return vmClasses::NativeEntryPoint_klass() != nullptr &&
1117 klass->is_subclass_of(vmClasses::NativeEntryPoint_klass());
1118 }
1119 static bool is_instance(oop obj);
1120
1121 // Accessors for code generation:
1122 static int method_type_offset_in_bytes() { return _method_type_offset; }
1123 static int downcall_stub_address_offset_in_bytes() { return _downcall_stub_address_offset; }
1124 };
1125
1126 class jdk_internal_foreign_abi_ABIDescriptor: AllStatic {
1127 friend class JavaClasses;
1128
1129 private:
1130 static int _inputStorage_offset;
1131 static int _outputStorage_offset;
1132 static int _volatileStorage_offset;
1133 static int _stackAlignment_offset;
1134 static int _shadowSpace_offset;
1135 static int _scratch1_offset;
1136 static int _scratch2_offset;
1137
1138 static void compute_offsets();
1139
1140 public:
1141 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1142
1143 // Accessors
1144 static objArrayOop inputStorage(oop entry);
1145 static objArrayOop outputStorage(oop entry);
1146 static objArrayOop volatileStorage(oop entry);
1147 static jint stackAlignment(oop entry);
1148 static jint shadowSpace(oop entry);
1149 static oop scratch1(oop entry);
1150 static oop scratch2(oop entry);
1151
1152 // Testers
1153 static bool is_subclass(Klass* klass) {
1154 return vmClasses::ABIDescriptor_klass() != nullptr &&
1155 klass->is_subclass_of(vmClasses::ABIDescriptor_klass());
1156 }
1157 static bool is_instance(oop obj);
1158 };
1159
1160 class jdk_internal_foreign_abi_VMStorage: AllStatic {
1161 friend class JavaClasses;
1162
1163 private:
1164 static int _type_offset;
1165 static int _indexOrOffset_offset;
1166 static int _segmentMaskOrSize_offset;
1167 static int _debugName_offset;
1168
1169 static void compute_offsets();
1170
1171 public:
1172 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1173
1174 // Accessors
1175 static jbyte type(oop entry);
1176 static jint index_or_offset(oop entry);
1177 static jshort segment_mask_or_size(oop entry);
1178 static oop debugName(oop entry);
1179
1180 // Testers
1181 static bool is_subclass(Klass* klass) {
1182 return vmClasses::VMStorage_klass() != nullptr &&
1183 klass->is_subclass_of(vmClasses::VMStorage_klass());
1184 }
1185 static bool is_instance(oop obj);
1186 };
1187
1188 class jdk_internal_foreign_abi_CallConv: AllStatic {
1189 friend class JavaClasses;
1190
1191 private:
1192 static int _argRegs_offset;
1193 static int _retRegs_offset;
1194
1195 static void compute_offsets();
1196
1197 public:
1198 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1199
1200 // Accessors
1201 static objArrayOop argRegs(oop entry);
1202 static objArrayOop retRegs(oop entry);
1203
1204 // Testers
1205 static bool is_subclass(Klass* klass) {
1206 return vmClasses::CallConv_klass() != nullptr &&
1207 klass->is_subclass_of(vmClasses::CallConv_klass());
1208 }
1209 static bool is_instance(oop obj);
1210 };
1211
1212 // Interface to java.lang.invoke.MemberName objects
1213 // (These are a private interface for Java code to query the class hierarchy.)
1214
1215 #define RESOLVEDMETHOD_INJECTED_FIELDS(macro) \
1216 macro(java_lang_invoke_ResolvedMethodName, vmtarget, intptr_signature, false)
1217
1218 class java_lang_invoke_ResolvedMethodName : AllStatic {
1219 friend class JavaClasses;
1220
1221 static int _vmtarget_offset;
1222 static int _vmholder_offset;
1223
1224 static void compute_offsets();
1225 public:
1226 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1227
1228 static int vmtarget_offset() { CHECK_INIT(_vmtarget_offset); }
1229
1230 static Method* vmtarget(oop resolved_method);
1231 static void set_vmtarget(oop resolved_method, Method* method);
1232
1233 static void set_vmholder(oop resolved_method, oop holder);
1234
1235 // find or create resolved member name
1236 static oop find_resolved_method(const methodHandle& m, TRAPS);
1237
1238 static bool is_instance(oop resolved_method);
1239 };
1240
1241
1242 #define MEMBERNAME_INJECTED_FIELDS(macro) \
1243 macro(java_lang_invoke_MemberName, vmindex, intptr_signature, false)
1244
1245
1246 class java_lang_invoke_MemberName: AllStatic {
1247 friend class JavaClasses;
1248
1249 private:
1250 // From java.lang.invoke.MemberName:
1251 // private Class<?> clazz; // class in which the method is defined
1252 // private String name; // may be null if not yet materialized
1253 // private Object type; // may be null if not yet materialized
1254 // private int flags; // modifier bits; see reflect.Modifier
1255 // private ResolvedMethodName method; // holds VM-specific target value
1256 // private intptr_t vmindex; // member index within class or interface
1257 static int _clazz_offset;
1258 static int _name_offset;
1259 static int _type_offset;
1260 static int _flags_offset;
1261 static int _method_offset;
1262 static int _vmindex_offset;
1263
1264 static void compute_offsets();
1265
1266 public:
1267 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1268 // Accessors
1269 static oop clazz(oop mname);
1270 static void set_clazz(oop mname, oop clazz);
1271
1272 static oop type(oop mname);
1273 static void set_type(oop mname, oop type);
1274
1275 static oop name(oop mname);
1276 static void set_name(oop mname, oop name);
1277
1278 static int flags(oop mname);
1279 static void set_flags(oop mname, int flags);
1280
1281 // Link through ResolvedMethodName field to get Method*
1282 static Method* vmtarget(oop mname);
1283 static void set_method(oop mname, oop method);
1284
1285 static intptr_t vmindex(oop mname);
1286 static void set_vmindex(oop mname, intptr_t index);
1287
1288 // Testers
1289 static bool is_subclass(Klass* klass) {
1290 return klass->is_subclass_of(vmClasses::MemberName_klass());
1291 }
1292 static bool is_instance(oop obj);
1293
1294 static bool is_method(oop obj);
1295
1296 // Relevant integer codes (keep these in synch. with MethodHandleNatives.Constants):
1297 enum {
1298 MN_IS_METHOD = 0x00010000, // method (not constructor)
1299 MN_IS_CONSTRUCTOR = 0x00020000, // constructor
1300 MN_IS_FIELD = 0x00040000, // field
1301 MN_IS_TYPE = 0x00080000, // nested type
1302 MN_CALLER_SENSITIVE = 0x00100000, // @CallerSensitive annotation detected
1303 MN_TRUSTED_FINAL = 0x00200000, // trusted final field
1304 MN_HIDDEN_MEMBER = 0x00400000, // @Hidden annotation detected
1305 MN_REFERENCE_KIND_SHIFT = 24, // refKind
1306 MN_REFERENCE_KIND_MASK = 0x0F000000 >> MN_REFERENCE_KIND_SHIFT,
1307 MN_NESTMATE_CLASS = 0x00000001,
1308 MN_HIDDEN_CLASS = 0x00000002,
1309 MN_STRONG_LOADER_LINK = 0x00000004,
1310 MN_ACCESS_VM_ANNOTATIONS = 0x00000008,
1311 // Lookup modes
1312 MN_MODULE_MODE = 0x00000010,
1313 MN_UNCONDITIONAL_MODE = 0x00000020,
1314 MN_TRUSTED_MODE = -1
1315 };
1316
1317 // Accessors for code generation:
1318 static int clazz_offset() { CHECK_INIT(_clazz_offset); }
1319 static int type_offset() { CHECK_INIT(_type_offset); }
1320 static int flags_offset() { CHECK_INIT(_flags_offset); }
1321 static int method_offset() { CHECK_INIT(_method_offset); }
1322 static int vmindex_offset() { CHECK_INIT(_vmindex_offset); }
1323 };
1324
1325
1326 // Interface to java.lang.invoke.MethodType objects
1327
1328 class java_lang_invoke_MethodType: AllStatic {
1329 friend class JavaClasses;
1330
1331 private:
1332 static int _rtype_offset;
1333 static int _ptypes_offset;
1334
1335 static void compute_offsets();
1336
1337 public:
1338 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1339 // Accessors
1340 static oop rtype(oop mt);
1341 static objArrayOop ptypes(oop mt);
1342
1343 static oop ptype(oop mt, int index);
1344 static int ptype_count(oop mt);
1345
1346 static int ptype_slot_count(oop mt); // extra counts for long/double
1347 static int rtype_slot_count(oop mt); // extra counts for long/double
1348
1349 static Symbol* as_signature(oop mt, bool intern_if_not_found);
1350 static void print_signature(oop mt, outputStream* st);
1351
1352 static bool is_instance(oop obj);
1353
1354 static bool equals(oop mt1, oop mt2);
1355
1356 // Accessors for code generation:
1357 static int rtype_offset() { CHECK_INIT(_rtype_offset); }
1358 static int ptypes_offset() { CHECK_INIT(_ptypes_offset); }
1359 };
1360
1361
1362 // Interface to java.lang.invoke.CallSite objects
1363
1364 class java_lang_invoke_CallSite: AllStatic {
1365 friend class JavaClasses;
1366
1367 private:
1368 static int _target_offset;
1369 static int _context_offset;
1370
1371 static void compute_offsets();
1372
1373 public:
1374 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1375 // Accessors
1376 static oop target( oop site);
1377 static void set_target( oop site, oop target);
1378 static void set_target_volatile( oop site, oop target);
1379
1380 static oop context_no_keepalive(oop site);
1381
1382 // Testers
1383 static bool is_subclass(Klass* klass) {
1384 return klass->is_subclass_of(vmClasses::CallSite_klass());
1385 }
1386 static bool is_instance(oop obj);
1387
1388 // Accessors for code generation:
1389 static int target_offset() { CHECK_INIT(_target_offset); }
1390 static int context_offset() { CHECK_INIT(_context_offset); }
1391 };
1392
1393 // Interface to java.lang.invoke.ConstantCallSite objects
1394
1395 class java_lang_invoke_ConstantCallSite: AllStatic {
1396 friend class JavaClasses;
1397
1398 private:
1399 static int _is_frozen_offset;
1400
1401 static void compute_offsets();
1402
1403 public:
1404 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1405 // Accessors
1406 static jboolean is_frozen(oop site);
1407
1408 // Testers
1409 static bool is_subclass(Klass* klass) {
1410 return klass->is_subclass_of(vmClasses::ConstantCallSite_klass());
1411 }
1412 static bool is_instance(oop obj);
1413 };
1414
1415 // Interface to java.lang.invoke.MethodHandleNatives$CallSiteContext objects
1416
1417 #define CALLSITECONTEXT_INJECTED_FIELDS(macro) \
1418 macro(java_lang_invoke_MethodHandleNatives_CallSiteContext, vmdependencies, intptr_signature, false) \
1419 macro(java_lang_invoke_MethodHandleNatives_CallSiteContext, last_cleanup, long_signature, false)
1420
1421 class DependencyContext;
1422
1423 class java_lang_invoke_MethodHandleNatives_CallSiteContext : AllStatic {
1424 friend class JavaClasses;
1425
1426 private:
1427 static int _vmdependencies_offset;
1428 static int _last_cleanup_offset;
1429
1430 static void compute_offsets();
1431
1432 public:
1433 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1434 // Accessors
1435 static DependencyContext vmdependencies(oop context);
1436
1437 // Testers
1438 static bool is_subclass(Klass* klass) {
1439 return klass->is_subclass_of(vmClasses::Context_klass());
1440 }
1441 static bool is_instance(oop obj);
1442 };
1443
1444 // Interface to java.security.AccessControlContext objects
1445
1446 class java_security_AccessControlContext: AllStatic {
1447 private:
1448 // Note that for this class the layout changed between JDK1.2 and JDK1.3,
1449 // so we compute the offsets at startup rather than hard-wiring them.
1450 static int _context_offset;
1451 static int _privilegedContext_offset;
1452 static int _isPrivileged_offset;
1453 static int _isAuthorized_offset;
1454
1455 static void compute_offsets();
1456 public:
1457 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1458 static oop create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS);
1459
1460 // Debugging/initialization
1461 friend class JavaClasses;
1462 };
1463
1464
1465 // Interface to java.lang.ClassLoader objects
1466
1467 #define CLASSLOADER_INJECTED_FIELDS(macro) \
1468 macro(java_lang_ClassLoader, loader_data, intptr_signature, false)
1469
1470 class java_lang_ClassLoader : AllStatic {
1471 private:
1472 static int _loader_data_offset;
1473 static int _parent_offset;
1474 static int _parallelCapable_offset;
1475 static int _name_offset;
1476 static int _nameAndId_offset;
1477 static int _unnamedModule_offset;
1478
1479 static void compute_offsets();
1480
1481 public:
1482 // Support for CDS
1483 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1484 static int loader_data_offset() { return _loader_data_offset; }
1485
1486 static ClassLoaderData* loader_data_acquire(oop loader);
1487 static ClassLoaderData* loader_data(oop loader);
1488 static void release_set_loader_data(oop loader, ClassLoaderData* new_data);
1489
1490 static oop parent(oop loader);
1491 static oop parent_no_keepalive(oop loader);
1492 static oop name(oop loader);
1493 static oop nameAndId(oop loader);
1494 static bool isAncestor(oop loader, oop cl);
1495
1496 // Support for parallelCapable field
1497 static bool parallelCapable(oop the_class_mirror);
1498
1499 static bool is_trusted_loader(oop loader);
1500
1501 // Return true if this is one of the class loaders associated with
1502 // the generated bytecodes for serialization constructor returned
1503 // by sun.reflect.ReflectionFactory::newConstructorForSerialization
1504 static bool is_reflection_class_loader(oop loader);
1505
1506 // Fix for 4474172
1507 static oop non_reflection_class_loader(oop loader);
1508
1509 // Testers
1510 static bool is_subclass(Klass* klass) {
1511 return klass->is_subclass_of(vmClasses::ClassLoader_klass());
1512 }
1513 static bool is_instance(oop obj);
1514
1515 static oop unnamedModule(oop loader);
1516
1517 // Debugging
1518 friend class JavaClasses;
1519 };
1520
1521
1522 // Interface to java.lang.System objects
1523
1524 class java_lang_System : AllStatic {
1525 private:
1526 static int _static_in_offset;
1527 static int _static_out_offset;
1528 static int _static_err_offset;
1529 static int _static_security_offset;
1530 static int _static_allow_security_offset;
1531 static int _static_never_offset;
1532
1533 public:
1534 static int in_offset() { CHECK_INIT(_static_in_offset); }
1535 static int out_offset() { CHECK_INIT(_static_out_offset); }
1536 static int err_offset() { CHECK_INIT(_static_err_offset); }
1537 static bool allow_security_manager();
1538 static bool has_security_manager();
1539
1540 static void compute_offsets();
1541 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1542
1543 // Debugging
1544 friend class JavaClasses;
1545 };
1546
1547
1548 // Interface to java.lang.StackTraceElement objects
1549
1550 class java_lang_StackTraceElement: AllStatic {
1551 private:
1552 static int _declaringClassObject_offset;
1553 static int _classLoaderName_offset;
1554 static int _moduleName_offset;
1555 static int _moduleVersion_offset;
1556 static int _declaringClass_offset;
1557 static int _methodName_offset;
1558 static int _fileName_offset;
1559 static int _lineNumber_offset;
1560
1561 // Setters
1562 static void set_classLoaderName(oop element, oop value);
1563 static void set_moduleName(oop element, oop value);
1564 static void set_moduleVersion(oop element, oop value);
1565 static void set_declaringClass(oop element, oop value);
1566 static void set_methodName(oop element, oop value);
1567 static void set_fileName(oop element, oop value);
1568 static void set_lineNumber(oop element, int value);
1569 static void set_declaringClassObject(oop element, oop value);
1570
1571 static void decode_file_and_line(Handle java_mirror, InstanceKlass* holder, int version,
1572 const methodHandle& method, int bci,
1573 Symbol*& source, oop& source_file, int& line_number, TRAPS);
1574
1575 public:
1576 // Create an instance of StackTraceElement
1577 static oop create(const methodHandle& method, int bci, TRAPS);
1578
1579 static void fill_in(Handle element, InstanceKlass* holder, const methodHandle& method,
1580 int version, int bci, Symbol* name, TRAPS);
1581
1582 static void compute_offsets();
1583 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1584
1585 #if INCLUDE_JVMCI
1586 static void decode(const methodHandle& method, int bci, Symbol*& fileName, int& lineNumber, TRAPS);
1587 #endif
1588
1589 // Debugging
1590 friend class JavaClasses;
1591 };
1592
1593
1594 class Backtrace: AllStatic {
1595 public:
1596 // Helper backtrace functions to store bci|version together.
1597 static int merge_bci_and_version(int bci, int version);
1598 static int merge_mid_and_cpref(int mid, int cpref);
1599 static int bci_at(unsigned int merged);
1600 static int version_at(unsigned int merged);
1601 static int mid_at(unsigned int merged);
1602 static int cpref_at(unsigned int merged);
1603 static int get_line_number(Method* method, int bci);
1604 static Symbol* get_source_file_name(InstanceKlass* holder, int version);
1605
1606 // Debugging
1607 friend class JavaClasses;
1608 };
1609
1610 class java_lang_ClassFrameInfo: AllStatic {
1611 private:
1612 static int _classOrMemberName_offset;
1613 static int _flags_offset;
1614
1615 public:
1616 static oop classOrMemberName(oop info);
1617 static int flags(oop info);
1618
1619 // Setters
1620 static void init_class(Handle stackFrame, const methodHandle& m);
1621 static void init_method(Handle stackFrame, const methodHandle& m, TRAPS);
1622
1623 static void compute_offsets();
1624 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1625
1626 // Debugging
1627 friend class JavaClasses;
1628 };
1629
1630 // Interface to java.lang.StackFrameInfo objects
1631
1632 #define STACKFRAMEINFO_INJECTED_FIELDS(macro) \
1633 macro(java_lang_StackFrameInfo, version, short_signature, false)
1634
1635 class java_lang_StackFrameInfo: AllStatic {
1636 private:
1637 static int _type_offset;
1638 static int _name_offset;
1639 static int _bci_offset;
1640 static int _version_offset;
1641 static int _contScope_offset;
1642
1643 public:
1644 // Getters
1645 static oop name(oop info);
1646 static oop type(oop info);
1647 static Method* get_method(oop info);
1648
1649 // Setters
1650 static void set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, oop cont, TRAPS);
1651 static void set_name(oop info, oop value);
1652 static void set_type(oop info, oop value);
1653 static void set_bci(oop info, int value);
1654
1655 static void set_version(oop info, short value);
1656 static void set_contScope(oop info, oop value);
1657
1658 static void compute_offsets();
1659 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1660
1661 static void to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS);
1662
1663 // Debugging
1664 friend class JavaClasses;
1665 };
1666
1667 class java_lang_LiveStackFrameInfo: AllStatic {
1668 private:
1669 static int _monitors_offset;
1670 static int _locals_offset;
1671 static int _operands_offset;
1672 static int _mode_offset;
1673
1674 public:
1675 static void set_monitors(oop info, oop value);
1676 static void set_locals(oop info, oop value);
1677 static void set_operands(oop info, oop value);
1678 static void set_mode(oop info, int value);
1679
1680 static void compute_offsets();
1681 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1682
1683 // Debugging
1684 friend class JavaClasses;
1685 };
1686
1687 // Interface to java.lang.reflect.RecordComponent objects
1688
1689 class java_lang_reflect_RecordComponent: AllStatic {
1690 private:
1691 static int _clazz_offset;
1692 static int _name_offset;
1693 static int _type_offset;
1694 static int _accessor_offset;
1695 static int _signature_offset;
1696 static int _annotations_offset;
1697 static int _typeAnnotations_offset;
1698
1699 // Setters
1700 static void set_clazz(oop element, oop value);
1701 static void set_name(oop element, oop value);
1702 static void set_type(oop element, oop value);
1703 static void set_accessor(oop element, oop value);
1704 static void set_signature(oop element, oop value);
1705 static void set_annotations(oop element, oop value);
1706 static void set_typeAnnotations(oop element, oop value);
1707
1708 public:
1709 // Create an instance of RecordComponent
1710 static oop create(InstanceKlass* holder, RecordComponent* component, TRAPS);
1711
1712 static void compute_offsets();
1713 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1714
1715 // Debugging
1716 friend class JavaClasses;
1717 };
1718
1719
1720 // Interface to java.lang.AssertionStatusDirectives objects
1721
1722 class java_lang_AssertionStatusDirectives: AllStatic {
1723 private:
1724 static int _classes_offset;
1725 static int _classEnabled_offset;
1726 static int _packages_offset;
1727 static int _packageEnabled_offset;
1728 static int _deflt_offset;
1729
1730 public:
1731 // Setters
1732 static void set_classes(oop obj, oop val);
1733 static void set_classEnabled(oop obj, oop val);
1734 static void set_packages(oop obj, oop val);
1735 static void set_packageEnabled(oop obj, oop val);
1736 static void set_deflt(oop obj, bool val);
1737
1738 static void compute_offsets();
1739 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1740
1741 // Debugging
1742 friend class JavaClasses;
1743 };
1744
1745
1746 class java_util_concurrent_locks_AbstractOwnableSynchronizer : AllStatic {
1747 private:
1748 static int _owner_offset;
1749 public:
1750 static void compute_offsets();
1751 static oop get_owner_threadObj(oop obj);
1752 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1753 };
1754
1755 // Interface to jdk.internal.misc.UnsafeConsants
1756
1757 class jdk_internal_misc_UnsafeConstants : AllStatic {
1758 public:
1759 static void set_unsafe_constants();
1760 static void compute_offsets() { }
1761 static void serialize_offsets(SerializeClosure* f) { }
1762 };
1763
1764 // Interface to jdk.internal.vm.vector.VectorSupport.VectorPayload objects
1765
1766 class vector_VectorPayload : AllStatic {
1767 private:
1768 static int _payload_offset;
1769 public:
1770 static void set_payload(oop o, oop val);
1771
1772 static void compute_offsets();
1773 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1774
1775 // Testers
1776 static bool is_subclass(Klass* klass) {
1777 return klass->is_subclass_of(vmClasses::vector_VectorPayload_klass());
1778 }
1779 static bool is_instance(oop obj);
1780 };
1781
1782 class java_lang_Integer : AllStatic {
1783 public:
1784 static jint value(oop obj);
1785 };
1786
1787 class java_lang_Long : AllStatic {
1788 public:
1789 static jlong value(oop obj);
1790 };
1791
1792 class java_lang_Character : AllStatic {
1793 public:
1794 static jchar value(oop obj);
1795 };
1796
1797 class java_lang_Short : AllStatic {
1798 public:
1799 static jshort value(oop obj);
1800 };
1801
1802 class java_lang_Byte : AllStatic {
1803 public:
1804 static jbyte value(oop obj);
1805 };
1806
1807 class java_lang_Boolean : AllStatic {
1808 private:
1809 static int _static_TRUE_offset;
1810 static int _static_FALSE_offset;
1811 public:
1812 static Symbol* symbol();
1813 static void compute_offsets(InstanceKlass* k);
1814 static oop get_TRUE(InstanceKlass *k);
1815 static oop get_FALSE(InstanceKlass *k);
1816 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1817 static jboolean value(oop obj);
1818 };
1819
1820 class java_lang_Integer_IntegerCache : AllStatic {
1821 private:
1822 static int _static_cache_offset;
1823 public:
1824 static Symbol* symbol();
1825 static void compute_offsets(InstanceKlass* k);
1826 static objArrayOop cache(InstanceKlass *k);
1827 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1828 };
1829
1830 class java_lang_Long_LongCache : AllStatic {
1831 private:
1832 static int _static_cache_offset;
1833 public:
1834 static Symbol* symbol();
1835 static void compute_offsets(InstanceKlass* k);
1836 static objArrayOop cache(InstanceKlass *k);
1837 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1838 };
1839
1840 class java_lang_Character_CharacterCache : AllStatic {
1841 private:
1842 static int _static_cache_offset;
1843 public:
1844 static Symbol* symbol();
1845 static void compute_offsets(InstanceKlass* k);
1846 static objArrayOop cache(InstanceKlass *k);
1847 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1848 };
1849
1850 class java_lang_Short_ShortCache : AllStatic {
1851 private:
1852 static int _static_cache_offset;
1853 public:
1854 static Symbol* symbol();
1855 static void compute_offsets(InstanceKlass* k);
1856 static objArrayOop cache(InstanceKlass *k);
1857 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1858 };
1859
1860 class java_lang_Byte_ByteCache : AllStatic {
1861 private:
1862 static int _static_cache_offset;
1863 public:
1864 static Symbol* symbol();
1865 static void compute_offsets(InstanceKlass* k);
1866 static objArrayOop cache(InstanceKlass *k);
1867 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1868 };
1869
1870
1871 // Interface to java.lang.InternalError objects
1872
1873 #define INTERNALERROR_INJECTED_FIELDS(macro) \
1874 macro(java_lang_InternalError, during_unsafe_access, bool_signature, false)
1875
1876 class java_lang_InternalError : AllStatic {
1877 private:
1878 static int _during_unsafe_access_offset;
1879 public:
1880 static jboolean during_unsafe_access(oop internal_error);
1881 static void set_during_unsafe_access(oop internal_error);
1882 static void compute_offsets();
1883 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1884 };
1885
1886 // Use to declare fields that need to be injected into Java classes
1887 // for the JVM to use. The name_index and signature_index are
1888 // declared in vmSymbols. The may_be_java flag is used to declare
1889 // fields that might already exist in Java but should be injected if
1890 // they don't. Otherwise the field is unconditionally injected and
1891 // the JVM uses the injected one. This is to ensure that name
1892 // collisions don't occur. In general may_be_java should be false
1893 // unless there's a good reason.
1894
1895 class InjectedField {
1896 public:
1897 const vmClassID klass_id;
1898 const vmSymbolID name_index;
1899 const vmSymbolID signature_index;
1900 const bool may_be_java;
1901
1902
1903 Klass* klass() const { return vmClasses::klass_at(klass_id); }
1904 Symbol* name() const { return lookup_symbol(name_index); }
1905 Symbol* signature() const { return lookup_symbol(signature_index); }
1906
1907 int compute_offset();
1908
1909 // Find the Symbol for this index
1910 static Symbol* lookup_symbol(vmSymbolID symbol_index) {
1911 return Symbol::vm_symbol_at(symbol_index);
1912 }
1913 };
1914
1915
1916 // Interface to hard-coded offset checking
1917
1918 enum class InjectedFieldID : int;
1919
1920 class JavaClasses : AllStatic {
1921 private:
1922
1923 static InjectedField _injected_fields[];
1924
1925 static bool check_offset(const char *klass_name, int offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1926 public:
1927
1928 static int compute_injected_offset(InjectedFieldID id);
1929
1930 static void compute_offsets();
1931 static void check_offsets() PRODUCT_RETURN;
1932 static void serialize_offsets(SerializeClosure* soc) NOT_CDS_RETURN;
1933 static InjectedField* get_injected(Symbol* class_name, int* field_count);
1934 static bool is_supported_for_archiving(oop obj) NOT_CDS_JAVA_HEAP_RETURN_(false);
1935
1936 static void compute_offset(int &dest_offset,
1937 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol,
1938 bool is_static = false);
1939 static void compute_offset(int& dest_offset, InstanceKlass* ik,
1940 const char* name_string, Symbol* signature_symbol,
1941 bool is_static = false);
1942 };
1943
1944 #undef CHECK_INIT
1945
1946 #endif // SHARE_CLASSFILE_JAVACLASSES_HPP