1 /*
2 * Copyright (c) 1997, 2016, 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_VM_CLASSFILE_JAVACLASSES_HPP
26 #define SHARE_VM_CLASSFILE_JAVACLASSES_HPP
27
28 #include "classfile/systemDictionary.hpp"
29 #include "jvmtifiles/jvmti.h"
30 #include "oops/oop.hpp"
31 #include "runtime/os.hpp"
32 #include "utilities/utf8.hpp"
33
34 // Interface for manipulating the basic Java classes.
35 //
36 // All dependencies on layout of actual Java classes should be kept here.
37 // If the layout of any of the classes above changes the offsets must be adjusted.
38 //
39 // For most classes we hardwire the offsets for performance reasons. In certain
40 // cases (e.g. java.security.AccessControlContext) we compute the offsets at
41 // startup since the layout here differs between JDK1.2 and JDK1.3.
42 //
43 // Note that fields (static and non-static) are arranged with oops before non-oops
44 // on a per class basis. The offsets below have to reflect this ordering.
45 //
46 // When editing the layouts please update the check_offset verification code
47 // correspondingly. The names in the enums must be identical to the actual field
48 // names in order for the verification code to work.
49
50
51 // Interface to java.lang.String objects
52
53 class java_lang_String : AllStatic {
54 private:
55 static int value_offset;
56 static int hash_offset;
57 static int coder_offset;
58
59 static bool initialized;
60
61 static Handle basic_create(int length, bool byte_arr, TRAPS);
62
63 static inline void set_coder(oop string, jbyte coder);
64
65 public:
66
67 // Coders
68 enum Coder {
69 CODER_LATIN1 = 0,
70 CODER_UTF16 = 1
71 };
72
73 static void compute_offsets();
74
75 // Instance creation
76 static Handle create_from_unicode(jchar* unicode, int len, TRAPS);
77 static oop create_oop_from_unicode(jchar* unicode, int len, TRAPS);
78 static Handle create_from_str(const char* utf8_str, TRAPS);
79 static oop create_oop_from_str(const char* utf8_str, TRAPS);
80 static Handle create_from_symbol(Symbol* symbol, TRAPS);
81 static Handle create_from_platform_dependent_str(const char* str, TRAPS);
82 static Handle char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS);
83
84 static bool has_hash_field() {
85 assert(initialized, "Must be initialized");
86 return (hash_offset > 0);
87 }
88 static bool has_coder_field() {
89 assert(initialized, "Must be initialized");
90 return (coder_offset > 0);
91 }
92
93 static void set_compact_strings(bool value);
94
95 static int value_offset_in_bytes() {
96 assert(initialized && (value_offset > 0), "Must be initialized");
97 return value_offset;
98 }
99 static int hash_offset_in_bytes() {
100 assert(initialized && (hash_offset > 0), "Must be initialized");
101 return hash_offset;
102 }
103 static int coder_offset_in_bytes() {
104 assert(initialized && (coder_offset > 0), "Must be initialized");
105 return coder_offset;
106 }
107
108 static inline void set_value_raw(oop string, typeArrayOop buffer);
109 static inline void set_value(oop string, typeArrayOop buffer);
110 static inline void set_hash(oop string, unsigned int hash);
111
112 // Accessors
113 static inline typeArrayOop value(oop java_string);
114 static inline unsigned int hash(oop java_string);
115 static inline bool is_latin1(oop java_string);
116 static inline int length(oop java_string);
117 static int utf8_length(oop java_string);
118
119 // String converters
120 static char* as_utf8_string(oop java_string);
121 static char* as_utf8_string(oop java_string, char* buf, int buflen);
122 static char* as_utf8_string(oop java_string, int start, int len);
123 static char* as_utf8_string(oop java_string, int start, int len, char* buf, int buflen);
124 static char* as_platform_dependent_str(Handle java_string, TRAPS);
125 static jchar* as_unicode_string(oop java_string, int& length, TRAPS);
126 // produce an ascii string with all other values quoted using \u####
127 static char* as_quoted_ascii(oop java_string);
128
129 // Compute the hash value for a java.lang.String object which would
130 // contain the characters passed in.
131 //
132 // As the hash value used by the String object itself, in
133 // String.hashCode(). This value is normally calculated in Java code
134 // in the String.hashCode method(), but is precomputed for String
135 // objects in the shared archive file.
136 // hash P(31) from Kernighan & Ritchie
137 //
138 // For this reason, THIS ALGORITHM MUST MATCH String.hashCode().
139 static unsigned int hash_code(const jchar* s, int len) {
140 unsigned int h = 0;
141 while (len-- > 0) {
142 h = 31*h + (unsigned int) *s;
143 s++;
144 }
145 return h;
146 }
147
148 static unsigned int hash_code(const jbyte* s, int len) {
149 unsigned int h = 0;
150 while (len-- > 0) {
151 h = 31*h + (((unsigned int) *s) & 0xFF);
152 s++;
153 }
154 return h;
155 }
156
157 static unsigned int hash_code(oop java_string);
158
159 static bool equals(oop java_string, jchar* chars, int len);
160 static bool equals(oop str1, oop str2);
161
162 // Conversion between '.' and '/' formats
163 static Handle externalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '/', '.', THREAD); }
164 static Handle internalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '.', '/', THREAD); }
165
166 // Conversion
167 static Symbol* as_symbol(Handle java_string, TRAPS);
168 static Symbol* as_symbol_or_null(oop java_string);
169
170 // Testers
171 static bool is_instance(oop obj);
172 static inline bool is_instance_inlined(oop obj);
173
174 // Debugging
175 static void print(oop java_string, outputStream* st);
176 friend class JavaClasses;
177 friend class StringTable;
178 };
179
180
181 // Interface to java.lang.Class objects
182
183 #define CLASS_INJECTED_FIELDS(macro) \
184 macro(java_lang_Class, klass, intptr_signature, false) \
185 macro(java_lang_Class, array_klass, intptr_signature, false) \
186 macro(java_lang_Class, oop_size, int_signature, false) \
187 macro(java_lang_Class, static_oop_field_count, int_signature, false) \
188 macro(java_lang_Class, protection_domain, object_signature, false) \
189 macro(java_lang_Class, signers, object_signature, false)
190
191 class java_lang_Class : AllStatic {
192 friend class VMStructs;
193 friend class JVMCIVMStructs;
194
195 private:
196 // The fake offsets are added by the class loader when java.lang.Class is loaded
197
198 static int _klass_offset;
199 static int _array_klass_offset;
200
201 static int _oop_size_offset;
202 static int _static_oop_field_count_offset;
203
204 static int _protection_domain_offset;
205 static int _init_lock_offset;
206 static int _signers_offset;
207 static int _class_loader_offset;
208 static int _module_offset;
209 static int _component_mirror_offset;
210
211 static bool offsets_computed;
212 static int classRedefinedCount_offset;
213
214 static GrowableArray<Klass*>* _fixup_mirror_list;
215 static GrowableArray<Klass*>* _fixup_module_field_list;
216
217 static void set_init_lock(oop java_class, oop init_lock);
218 static void set_protection_domain(oop java_class, oop protection_domain);
219 static void set_class_loader(oop java_class, oop class_loader);
220 static void set_component_mirror(oop java_class, oop comp_mirror);
221 static void initialize_mirror_fields(KlassHandle k, Handle mirror, Handle protection_domain, TRAPS);
222 public:
223 static void compute_offsets();
224
225 // Instance creation
226 static void create_mirror(KlassHandle k, Handle class_loader, Handle module,
227 Handle protection_domain, TRAPS);
228 static void fixup_mirror(KlassHandle k, TRAPS);
229 static oop create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS);
230
231 static void fixup_module_field(KlassHandle k, Handle module);
232
233 // Conversion
234 static Klass* as_Klass(oop java_class);
235 static void set_klass(oop java_class, Klass* klass);
236 static BasicType as_BasicType(oop java_class, Klass** reference_klass = NULL);
237 static BasicType as_BasicType(oop java_class, KlassHandle* reference_klass) {
238 Klass* refk_oop = NULL;
239 BasicType result = as_BasicType(java_class, &refk_oop);
240 (*reference_klass) = KlassHandle(refk_oop);
241 return result;
242 }
243 static Symbol* as_signature(oop java_class, bool intern_if_not_found, TRAPS);
244 static void print_signature(oop java_class, outputStream *st);
245 static const char* as_external_name(oop java_class);
246 // Testing
247 static bool is_instance(oop obj);
248
249 static bool is_primitive(oop java_class);
250 static BasicType primitive_type(oop java_class);
251 static oop primitive_mirror(BasicType t);
252 // JVM_NewArray support
253 static Klass* array_klass(oop java_class);
254 static void set_array_klass(oop java_class, Klass* klass);
255 // compiler support for class operations
256 static int klass_offset_in_bytes() { return _klass_offset; }
257 static int array_klass_offset_in_bytes() { return _array_klass_offset; }
258 // Support for classRedefinedCount field
259 static int classRedefinedCount(oop the_class_mirror);
260 static void set_classRedefinedCount(oop the_class_mirror, int value);
261
262 // Support for embedded per-class oops
263 static oop protection_domain(oop java_class);
264 static oop init_lock(oop java_class);
265 static oop component_mirror(oop java_class);
266 static objArrayOop signers(oop java_class);
267 static void set_signers(oop java_class, objArrayOop signers);
268
269 static oop class_loader(oop java_class);
270 static void set_module(oop java_class, oop module);
271 static oop module(oop java_class);
272
273 static int oop_size(oop java_class);
274 static void set_oop_size(oop java_class, int size);
275 static int static_oop_field_count(oop java_class);
276 static void set_static_oop_field_count(oop java_class, int size);
277
278
279 static GrowableArray<Klass*>* fixup_mirror_list() {
280 return _fixup_mirror_list;
281 }
282 static void set_fixup_mirror_list(GrowableArray<Klass*>* v) {
283 _fixup_mirror_list = v;
284 }
285
286 static GrowableArray<Klass*>* fixup_module_field_list() {
287 return _fixup_module_field_list;
288 }
289 static void set_fixup_module_field_list(GrowableArray<Klass*>* v) {
290 _fixup_module_field_list = v;
291 }
292
293 // Debugging
294 friend class JavaClasses;
295 friend class InstanceKlass; // verification code accesses offsets
296 friend class ClassFileParser; // access to number_of_fake_fields
297 };
298
299 // Interface to java.lang.Thread objects
300
301 class java_lang_Thread : AllStatic {
302 private:
303 // Note that for this class the layout changed between JDK1.2 and JDK1.3,
304 // so we compute the offsets at startup rather than hard-wiring them.
305 static int _name_offset;
306 static int _group_offset;
307 static int _contextClassLoader_offset;
308 static int _inheritedAccessControlContext_offset;
309 static int _priority_offset;
310 static int _eetop_offset;
311 static int _daemon_offset;
312 static int _stillborn_offset;
313 static int _stackSize_offset;
314 static int _tid_offset;
315 static int _thread_status_offset;
316 static int _park_blocker_offset;
317 static int _park_event_offset ;
318
319 static void compute_offsets();
320
321 public:
322 // Instance creation
323 static oop create();
324 // Returns the JavaThread associated with the thread obj
325 static JavaThread* thread(oop java_thread);
326 // Set JavaThread for instance
327 static void set_thread(oop java_thread, JavaThread* thread);
328 // Name
329 static oop name(oop java_thread);
330 static void set_name(oop java_thread, oop name);
331 // Priority
332 static ThreadPriority priority(oop java_thread);
333 static void set_priority(oop java_thread, ThreadPriority priority);
334 // Thread group
335 static oop threadGroup(oop java_thread);
336 // Stillborn
337 static bool is_stillborn(oop java_thread);
338 static void set_stillborn(oop java_thread);
339 // Alive (NOTE: this is not really a field, but provides the correct
340 // definition without doing a Java call)
341 static bool is_alive(oop java_thread);
342 // Daemon
343 static bool is_daemon(oop java_thread);
344 static void set_daemon(oop java_thread);
345 // Context ClassLoader
346 static oop context_class_loader(oop java_thread);
347 // Control context
348 static oop inherited_access_control_context(oop java_thread);
349 // Stack size hint
350 static jlong stackSize(oop java_thread);
351 // Thread ID
352 static jlong thread_id(oop java_thread);
353
354 // Blocker object responsible for thread parking
355 static oop park_blocker(oop java_thread);
356
357 // Pointer to type-stable park handler, encoded as jlong.
358 // Should be set when apparently null
359 // For details, see unsafe.cpp Unsafe_Unpark
360 static jlong park_event(oop java_thread);
361 static bool set_park_event(oop java_thread, jlong ptr);
362
363 // Java Thread Status for JVMTI and M&M use.
364 // This thread status info is saved in threadStatus field of
365 // java.lang.Thread java class.
366 enum ThreadStatus {
367 NEW = 0,
368 RUNNABLE = JVMTI_THREAD_STATE_ALIVE + // runnable / running
369 JVMTI_THREAD_STATE_RUNNABLE,
370 SLEEPING = JVMTI_THREAD_STATE_ALIVE + // Thread.sleep()
371 JVMTI_THREAD_STATE_WAITING +
372 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
373 JVMTI_THREAD_STATE_SLEEPING,
374 IN_OBJECT_WAIT = JVMTI_THREAD_STATE_ALIVE + // Object.wait()
375 JVMTI_THREAD_STATE_WAITING +
376 JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
377 JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
378 IN_OBJECT_WAIT_TIMED = JVMTI_THREAD_STATE_ALIVE + // Object.wait(long)
379 JVMTI_THREAD_STATE_WAITING +
380 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
381 JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
382 PARKED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park()
383 JVMTI_THREAD_STATE_WAITING +
384 JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
385 JVMTI_THREAD_STATE_PARKED,
386 PARKED_TIMED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park(long)
387 JVMTI_THREAD_STATE_WAITING +
388 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
389 JVMTI_THREAD_STATE_PARKED,
390 BLOCKED_ON_MONITOR_ENTER = JVMTI_THREAD_STATE_ALIVE + // (re-)entering a synchronization block
391 JVMTI_THREAD_STATE_BLOCKED_ON_MONITOR_ENTER,
392 TERMINATED = JVMTI_THREAD_STATE_TERMINATED
393 };
394 // Write thread status info to threadStatus field of java.lang.Thread.
395 static void set_thread_status(oop java_thread_oop, ThreadStatus status);
396 // Read thread status info from threadStatus field of java.lang.Thread.
397 static ThreadStatus get_thread_status(oop java_thread_oop);
398
399 static const char* thread_status_name(oop java_thread_oop);
400
401 // Debugging
402 friend class JavaClasses;
403 };
404
405 // Interface to java.lang.ThreadGroup objects
406
407 class java_lang_ThreadGroup : AllStatic {
408 private:
409 static int _parent_offset;
410 static int _name_offset;
411 static int _threads_offset;
412 static int _groups_offset;
413 static int _maxPriority_offset;
414 static int _destroyed_offset;
415 static int _daemon_offset;
416 static int _nthreads_offset;
417 static int _ngroups_offset;
418
419 static void compute_offsets();
420
421 public:
422 // parent ThreadGroup
423 static oop parent(oop java_thread_group);
424 // name
425 static const char* name(oop java_thread_group);
426 // ("name as oop" accessor is not necessary)
427 // Number of threads in group
428 static int nthreads(oop java_thread_group);
429 // threads
430 static objArrayOop threads(oop java_thread_group);
431 // Number of threads in group
432 static int ngroups(oop java_thread_group);
433 // groups
434 static objArrayOop groups(oop java_thread_group);
435 // maxPriority in group
436 static ThreadPriority maxPriority(oop java_thread_group);
437 // Destroyed
438 static bool is_destroyed(oop java_thread_group);
439 // Daemon
440 static bool is_daemon(oop java_thread_group);
441 // Debugging
442 friend class JavaClasses;
443 };
444
445
446
447 // Interface to java.lang.Throwable objects
448
449 class java_lang_Throwable: AllStatic {
450 friend class BacktraceBuilder;
451 friend class BacktraceIterator;
452
453 private:
454 // Offsets
455 enum {
456 hc_backtrace_offset = 0,
457 hc_detailMessage_offset = 1,
458 hc_cause_offset = 2, // New since 1.4
459 hc_stackTrace_offset = 3 // New since 1.4
460 };
461 enum {
462 hc_static_unassigned_stacktrace_offset = 0 // New since 1.7
463 };
464 // Trace constants
465 enum {
466 trace_methods_offset = 0,
467 trace_bcis_offset = 1,
468 trace_mirrors_offset = 2,
469 trace_cprefs_offset = 3,
470 trace_next_offset = 4,
471 trace_size = 5,
472 trace_chunk_size = 32
473 };
474
475 static int backtrace_offset;
476 static int detailMessage_offset;
477 static int stackTrace_offset;
478 static int depth_offset;
479 static int static_unassigned_stacktrace_offset;
480
481 // StackTrace (programmatic access, new since 1.4)
482 static void clear_stacktrace(oop throwable);
483 // Stacktrace (post JDK 1.7.0 to allow immutability protocol to be followed)
484 static void set_stacktrace(oop throwable, oop st_element_array);
485 static oop unassigned_stacktrace();
486
487 public:
488 // Backtrace
489 static oop backtrace(oop throwable);
490 static void set_backtrace(oop throwable, oop value);
491 static int depth(oop throwable);
492 static void set_depth(oop throwable, int value);
493 // Needed by JVMTI to filter out this internal field.
494 static int get_backtrace_offset() { return backtrace_offset;}
495 static int get_detailMessage_offset() { return detailMessage_offset;}
496 // Message
497 static oop message(Handle throwable);
498 static void set_message(oop throwable, oop value);
499 static Symbol* detail_message(oop throwable);
500 static void print_stack_element(outputStream *st, const methodHandle& method, int bci);
501 static void print_stack_usage(Handle stream);
502
503 static void compute_offsets();
504
505 // Allocate space for backtrace (created but stack trace not filled in)
506 static void allocate_backtrace(Handle throwable, TRAPS);
507 // Fill in current stack trace for throwable with preallocated backtrace (no GC)
508 static void fill_in_stack_trace_of_preallocated_backtrace(Handle throwable);
509 // Fill in current stack trace, can cause GC
510 static void fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS);
511 static void fill_in_stack_trace(Handle throwable, const methodHandle& method = methodHandle());
512 // Programmatic access to stack trace
513 static void get_stack_trace_elements(Handle throwable, objArrayHandle stack_trace, TRAPS);
514 // Printing
515 static void print(Handle throwable, outputStream* st);
516 static void print_stack_trace(Handle throwable, outputStream* st);
517 static void java_printStackTrace(Handle throwable, TRAPS);
518 // Debugging
519 friend class JavaClasses;
520 };
521
522
523 // Interface to java.lang.reflect.AccessibleObject objects
524
525 class java_lang_reflect_AccessibleObject: AllStatic {
526 private:
527 // Note that to reduce dependencies on the JDK we compute these
528 // offsets at run-time.
529 static int override_offset;
530
531 static void compute_offsets();
532
533 public:
534 // Accessors
535 static jboolean override(oop reflect);
536 static void set_override(oop reflect, jboolean value);
537
538 // Debugging
539 friend class JavaClasses;
540 };
541
542
543 // Interface to java.lang.reflect.Method objects
544
545 class java_lang_reflect_Method : public java_lang_reflect_AccessibleObject {
546 private:
547 // Note that to reduce dependencies on the JDK we compute these
548 // offsets at run-time.
549 static int clazz_offset;
550 static int name_offset;
551 static int returnType_offset;
552 static int parameterTypes_offset;
553 static int exceptionTypes_offset;
554 static int slot_offset;
555 static int modifiers_offset;
556 static int signature_offset;
557 static int annotations_offset;
558 static int parameter_annotations_offset;
559 static int annotation_default_offset;
560 static int type_annotations_offset;
561
562 static void compute_offsets();
563
564 public:
565 // Allocation
566 static Handle create(TRAPS);
567
568 // Accessors
569 static oop clazz(oop reflect);
570 static void set_clazz(oop reflect, oop value);
571
572 static oop name(oop method);
573 static void set_name(oop method, oop value);
574
575 static oop return_type(oop method);
576 static void set_return_type(oop method, oop value);
577
578 static oop parameter_types(oop method);
579 static void set_parameter_types(oop method, oop value);
580
581 static oop exception_types(oop method);
582 static void set_exception_types(oop method, oop value);
583
584 static int slot(oop reflect);
585 static void set_slot(oop reflect, int value);
586
587 static int modifiers(oop method);
588 static void set_modifiers(oop method, int value);
589
590 static bool has_signature_field();
591 static oop signature(oop method);
592 static void set_signature(oop method, oop value);
593
594 static bool has_annotations_field();
595 static oop annotations(oop method);
596 static void set_annotations(oop method, oop value);
597
598 static bool has_parameter_annotations_field();
599 static oop parameter_annotations(oop method);
600 static void set_parameter_annotations(oop method, oop value);
601
602 static bool has_annotation_default_field();
603 static oop annotation_default(oop method);
604 static void set_annotation_default(oop method, oop value);
605
606 static bool has_type_annotations_field();
607 static oop type_annotations(oop method);
608 static void set_type_annotations(oop method, oop value);
609
610 // Debugging
611 friend class JavaClasses;
612 };
613
614
615 // Interface to java.lang.reflect.Constructor objects
616
617 class java_lang_reflect_Constructor : public java_lang_reflect_AccessibleObject {
618 private:
619 // Note that to reduce dependencies on the JDK we compute these
620 // offsets at run-time.
621 static int clazz_offset;
622 static int parameterTypes_offset;
623 static int exceptionTypes_offset;
624 static int slot_offset;
625 static int modifiers_offset;
626 static int signature_offset;
627 static int annotations_offset;
628 static int parameter_annotations_offset;
629 static int type_annotations_offset;
630
631 static void compute_offsets();
632
633 public:
634 // Allocation
635 static Handle create(TRAPS);
636
637 // Accessors
638 static oop clazz(oop reflect);
639 static void set_clazz(oop reflect, oop value);
640
641 static oop parameter_types(oop constructor);
642 static void set_parameter_types(oop constructor, oop value);
643
644 static oop exception_types(oop constructor);
645 static void set_exception_types(oop constructor, oop value);
646
647 static int slot(oop reflect);
648 static void set_slot(oop reflect, int value);
649
650 static int modifiers(oop constructor);
651 static void set_modifiers(oop constructor, int value);
652
653 static bool has_signature_field();
654 static oop signature(oop constructor);
655 static void set_signature(oop constructor, oop value);
656
657 static bool has_annotations_field();
658 static oop annotations(oop constructor);
659 static void set_annotations(oop constructor, oop value);
660
661 static bool has_parameter_annotations_field();
662 static oop parameter_annotations(oop method);
663 static void set_parameter_annotations(oop method, oop value);
664
665 static bool has_type_annotations_field();
666 static oop type_annotations(oop constructor);
667 static void set_type_annotations(oop constructor, oop value);
668
669 // Debugging
670 friend class JavaClasses;
671 };
672
673
674 // Interface to java.lang.reflect.Field objects
675
676 class java_lang_reflect_Field : public java_lang_reflect_AccessibleObject {
677 private:
678 // Note that to reduce dependencies on the JDK we compute these
679 // offsets at run-time.
680 static int clazz_offset;
681 static int name_offset;
682 static int type_offset;
683 static int slot_offset;
684 static int modifiers_offset;
685 static int signature_offset;
686 static int annotations_offset;
687 static int type_annotations_offset;
688
689 static void compute_offsets();
690
691 public:
692 // Allocation
693 static Handle create(TRAPS);
694
695 // Accessors
696 static oop clazz(oop reflect);
697 static void set_clazz(oop reflect, oop value);
698
699 static oop name(oop field);
700 static void set_name(oop field, oop value);
701
702 static oop type(oop field);
703 static void set_type(oop field, oop value);
704
705 static int slot(oop reflect);
706 static void set_slot(oop reflect, int value);
707
708 static int modifiers(oop field);
709 static void set_modifiers(oop field, int value);
710
711 static bool has_signature_field();
712 static oop signature(oop constructor);
713 static void set_signature(oop constructor, oop value);
714
715 static bool has_annotations_field();
716 static oop annotations(oop constructor);
717 static void set_annotations(oop constructor, oop value);
718
719 static bool has_parameter_annotations_field();
720 static oop parameter_annotations(oop method);
721 static void set_parameter_annotations(oop method, oop value);
722
723 static bool has_annotation_default_field();
724 static oop annotation_default(oop method);
725 static void set_annotation_default(oop method, oop value);
726
727 static bool has_type_annotations_field();
728 static oop type_annotations(oop field);
729 static void set_type_annotations(oop field, oop value);
730
731 // Debugging
732 friend class JavaClasses;
733 };
734
735 class java_lang_reflect_Parameter {
736 private:
737 // Note that to reduce dependencies on the JDK we compute these
738 // offsets at run-time.
739 static int name_offset;
740 static int modifiers_offset;
741 static int index_offset;
742 static int executable_offset;
743
744 static void compute_offsets();
745
746 public:
747 // Allocation
748 static Handle create(TRAPS);
749
750 // Accessors
751 static oop name(oop field);
752 static void set_name(oop field, oop value);
753
754 static int index(oop reflect);
755 static void set_index(oop reflect, int value);
756
757 static int modifiers(oop reflect);
758 static void set_modifiers(oop reflect, int value);
759
760 static oop executable(oop constructor);
761 static void set_executable(oop constructor, oop value);
762
763 friend class JavaClasses;
764 };
765
766 #define MODULE_INJECTED_FIELDS(macro) \
767 macro(java_lang_reflect_Module, module_entry, intptr_signature, false)
768
769 class java_lang_reflect_Module {
770 private:
771 static int loader_offset;
772 static int name_offset;
773 static int _module_entry_offset;
774 static void compute_offsets();
775
776 public:
777 // Allocation
778 static Handle create(Handle loader, Handle module_name, TRAPS);
779
780 // Testers
781 static bool is_subclass(Klass* klass) {
782 return klass->is_subclass_of(SystemDictionary::reflect_Module_klass());
783 }
784 static bool is_instance(oop obj);
785
786 // Accessors
787 static oop loader(oop module);
788 static void set_loader(oop module, oop value);
789
790 static oop name(oop module);
791 static void set_name(oop module, oop value);
792
793 static ModuleEntry* module_entry(oop module, TRAPS);
794 static void set_module_entry(oop module, ModuleEntry* module_entry);
795
796 friend class JavaClasses;
797 };
798
799 // Interface to jdk.internal.reflect.ConstantPool objects
800 class reflect_ConstantPool {
801 private:
802 // Note that to reduce dependencies on the JDK we compute these
803 // offsets at run-time.
804 static int _oop_offset;
805
806 static void compute_offsets();
807
808 public:
809 // Allocation
810 static Handle create(TRAPS);
811
812 // Accessors
813 static void set_cp(oop reflect, ConstantPool* value);
814 static int oop_offset() {
815 return _oop_offset;
816 }
817
818 static ConstantPool* get_cp(oop reflect);
819
820 // Debugging
821 friend class JavaClasses;
822 };
823
824 // Interface to jdk.internal.reflect.UnsafeStaticFieldAccessorImpl objects
825 class reflect_UnsafeStaticFieldAccessorImpl {
826 private:
827 static int _base_offset;
828 static void compute_offsets();
829
830 public:
831 static int base_offset() {
832 return _base_offset;
833 }
834
835 // Debugging
836 friend class JavaClasses;
837 };
838
839 // Interface to java.lang primitive type boxing objects:
840 // - java.lang.Boolean
841 // - java.lang.Character
842 // - java.lang.Float
843 // - java.lang.Double
844 // - java.lang.Byte
845 // - java.lang.Short
846 // - java.lang.Integer
847 // - java.lang.Long
848
849 // This could be separated out into 8 individual classes.
850
851 class java_lang_boxing_object: AllStatic {
852 private:
853 enum {
854 hc_value_offset = 0
855 };
856 static int value_offset;
857 static int long_value_offset;
858
859 static oop initialize_and_allocate(BasicType type, TRAPS);
860 public:
861 // Allocation. Returns a boxed value, or NULL for invalid type.
862 static oop create(BasicType type, jvalue* value, TRAPS);
863 // Accessors. Returns the basic type being boxed, or T_ILLEGAL for invalid oop.
864 static BasicType get_value(oop box, jvalue* value);
865 static BasicType set_value(oop box, jvalue* value);
866 static BasicType basic_type(oop box);
867 static bool is_instance(oop box) { return basic_type(box) != T_ILLEGAL; }
868 static bool is_instance(oop box, BasicType type) { return basic_type(box) == type; }
869 static void print(oop box, outputStream* st) { jvalue value; print(get_value(box, &value), &value, st); }
870 static void print(BasicType type, jvalue* value, outputStream* st);
871
872 static int value_offset_in_bytes(BasicType type) {
873 return ( type == T_LONG || type == T_DOUBLE ) ? long_value_offset :
874 value_offset;
875 }
876
877 // Debugging
878 friend class JavaClasses;
879 };
880
881
882
883 // Interface to java.lang.ref.Reference objects
884
885 class java_lang_ref_Reference: AllStatic {
886 public:
887 enum {
888 hc_referent_offset = 0,
889 hc_queue_offset = 1,
890 hc_next_offset = 2,
891 hc_discovered_offset = 3 // Is not last, see SoftRefs.
892 };
893 enum {
894 hc_static_lock_offset = 0,
895 hc_static_pending_offset = 1
896 };
897
898 static int referent_offset;
899 static int queue_offset;
900 static int next_offset;
901 static int discovered_offset;
902 static int static_lock_offset;
903 static int static_pending_offset;
904 static int number_of_fake_oop_fields;
905
906 // Accessors
907 static inline oop referent(oop ref);
908 static inline void set_referent(oop ref, oop value);
909 static inline void set_referent_raw(oop ref, oop value);
910 static inline HeapWord* referent_addr(oop ref);
911 static inline oop next(oop ref);
912 static inline void set_next(oop ref, oop value);
913 static inline void set_next_raw(oop ref, oop value);
914 static inline HeapWord* next_addr(oop ref);
915 static inline oop discovered(oop ref);
916 static inline void set_discovered(oop ref, oop value);
917 static inline void set_discovered_raw(oop ref, oop value);
918 static inline HeapWord* discovered_addr(oop ref);
919
920 // Accessors for statics
921 static oop pending_list_lock();
922 static oop pending_list();
923
924 static HeapWord* pending_list_lock_addr();
925 static HeapWord* pending_list_addr();
926 };
927
928
929 // Interface to java.lang.ref.SoftReference objects
930
931 class java_lang_ref_SoftReference: public java_lang_ref_Reference {
932 public:
933 enum {
934 // The timestamp is a long field and may need to be adjusted for alignment.
935 hc_timestamp_offset = hc_discovered_offset + 1
936 };
937 enum {
938 hc_static_clock_offset = 0
939 };
940
941 static int timestamp_offset;
942 static int static_clock_offset;
943
944 // Accessors
945 static jlong timestamp(oop ref);
946
947 // Accessors for statics
948 static jlong clock();
949 static void set_clock(jlong value);
950 };
951
952 // Interface to java.lang.invoke.MethodHandle objects
953
954 class MethodHandleEntry;
955
956 class java_lang_invoke_MethodHandle: AllStatic {
957 friend class JavaClasses;
958
959 private:
960 static int _type_offset; // the MethodType of this MH
961 static int _form_offset; // the LambdaForm of this MH
962
963 static void compute_offsets();
964
965 public:
966 // Accessors
967 static oop type(oop mh);
968 static void set_type(oop mh, oop mtype);
969
970 static oop form(oop mh);
971 static void set_form(oop mh, oop lform);
972
973 // Testers
974 static bool is_subclass(Klass* klass) {
975 return klass->is_subclass_of(SystemDictionary::MethodHandle_klass());
976 }
977 static bool is_instance(oop obj);
978
979 // Accessors for code generation:
980 static int type_offset_in_bytes() { return _type_offset; }
981 static int form_offset_in_bytes() { return _form_offset; }
982 };
983
984 // Interface to java.lang.invoke.DirectMethodHandle objects
985
986 class java_lang_invoke_DirectMethodHandle: AllStatic {
987 friend class JavaClasses;
988
989 private:
990 static int _member_offset; // the MemberName of this DMH
991
992 static void compute_offsets();
993
994 public:
995 // Accessors
996 static oop member(oop mh);
997
998 // Testers
999 static bool is_subclass(Klass* klass) {
1000 return klass->is_subclass_of(SystemDictionary::DirectMethodHandle_klass());
1001 }
1002 static bool is_instance(oop obj);
1003
1004 // Accessors for code generation:
1005 static int member_offset_in_bytes() { return _member_offset; }
1006 };
1007
1008 // Interface to java.lang.invoke.LambdaForm objects
1009 // (These are a private interface for managing adapter code generation.)
1010
1011 class java_lang_invoke_LambdaForm: AllStatic {
1012 friend class JavaClasses;
1013
1014 private:
1015 static int _vmentry_offset; // type is MemberName
1016
1017 static void compute_offsets();
1018
1019 public:
1020 // Accessors
1021 static oop vmentry(oop lform);
1022 static void set_vmentry(oop lform, oop invoker);
1023
1024 // Testers
1025 static bool is_subclass(Klass* klass) {
1026 return SystemDictionary::LambdaForm_klass() != NULL &&
1027 klass->is_subclass_of(SystemDictionary::LambdaForm_klass());
1028 }
1029 static bool is_instance(oop obj);
1030
1031 // Accessors for code generation:
1032 static int vmentry_offset_in_bytes() { return _vmentry_offset; }
1033 };
1034
1035
1036 // Interface to java.lang.invoke.MemberName objects
1037 // (These are a private interface for Java code to query the class hierarchy.)
1038
1039 #define MEMBERNAME_INJECTED_FIELDS(macro) \
1040 macro(java_lang_invoke_MemberName, vmloader, object_signature, false) \
1041 macro(java_lang_invoke_MemberName, vmindex, intptr_signature, false) \
1042 macro(java_lang_invoke_MemberName, vmtarget, intptr_signature, false)
1043
1044 class java_lang_invoke_MemberName: AllStatic {
1045 friend class JavaClasses;
1046
1047 private:
1048 // From java.lang.invoke.MemberName:
1049 // private Class<?> clazz; // class in which the method is defined
1050 // private String name; // may be null if not yet materialized
1051 // private Object type; // may be null if not yet materialized
1052 // private int flags; // modifier bits; see reflect.Modifier
1053 // private intptr vmtarget; // VM-specific target value
1054 // private intptr_t vmindex; // member index within class or interface
1055 static int _clazz_offset;
1056 static int _name_offset;
1057 static int _type_offset;
1058 static int _flags_offset;
1059 static int _vmtarget_offset;
1060 static int _vmloader_offset;
1061 static int _vmindex_offset;
1062
1063 static void compute_offsets();
1064
1065 public:
1066 // Accessors
1067 static oop clazz(oop mname);
1068 static void set_clazz(oop mname, oop clazz);
1069
1070 static oop type(oop mname);
1071 static void set_type(oop mname, oop type);
1072
1073 static oop name(oop mname);
1074 static void set_name(oop mname, oop name);
1075
1076 static int flags(oop mname);
1077 static void set_flags(oop mname, int flags);
1078
1079 static Metadata* vmtarget(oop mname);
1080 static void set_vmtarget(oop mname, Metadata* target);
1081
1082 static intptr_t vmindex(oop mname);
1083 static void set_vmindex(oop mname, intptr_t index);
1084
1085 // Testers
1086 static bool is_subclass(Klass* klass) {
1087 return klass->is_subclass_of(SystemDictionary::MemberName_klass());
1088 }
1089 static bool is_instance(oop obj);
1090
1091 static bool is_method(oop obj);
1092
1093 // Relevant integer codes (keep these in synch. with MethodHandleNatives.Constants):
1094 enum {
1095 MN_IS_METHOD = 0x00010000, // method (not constructor)
1096 MN_IS_CONSTRUCTOR = 0x00020000, // constructor
1097 MN_IS_FIELD = 0x00040000, // field
1098 MN_IS_TYPE = 0x00080000, // nested type
1099 MN_CALLER_SENSITIVE = 0x00100000, // @CallerSensitive annotation detected
1100 MN_REFERENCE_KIND_SHIFT = 24, // refKind
1101 MN_REFERENCE_KIND_MASK = 0x0F000000 >> MN_REFERENCE_KIND_SHIFT,
1102 // The SEARCH_* bits are not for MN.flags but for the matchFlags argument of MHN.getMembers:
1103 MN_SEARCH_SUPERCLASSES = 0x00100000, // walk super classes
1104 MN_SEARCH_INTERFACES = 0x00200000 // walk implemented interfaces
1105 };
1106
1107 // Accessors for code generation:
1108 static int clazz_offset_in_bytes() { return _clazz_offset; }
1109 static int type_offset_in_bytes() { return _type_offset; }
1110 static int name_offset_in_bytes() { return _name_offset; }
1111 static int flags_offset_in_bytes() { return _flags_offset; }
1112 static int vmtarget_offset_in_bytes() { return _vmtarget_offset; }
1113 static int vmindex_offset_in_bytes() { return _vmindex_offset; }
1114
1115 static bool equals(oop mt1, oop mt2);
1116 };
1117
1118
1119 // Interface to java.lang.invoke.MethodType objects
1120
1121 class java_lang_invoke_MethodType: AllStatic {
1122 friend class JavaClasses;
1123
1124 private:
1125 static int _rtype_offset;
1126 static int _ptypes_offset;
1127
1128 static void compute_offsets();
1129
1130 public:
1131 // Accessors
1132 static oop rtype(oop mt);
1133 static objArrayOop ptypes(oop mt);
1134
1135 static oop ptype(oop mt, int index);
1136 static int ptype_count(oop mt);
1137
1138 static int ptype_slot_count(oop mt); // extra counts for long/double
1139 static int rtype_slot_count(oop mt); // extra counts for long/double
1140
1141 static Symbol* as_signature(oop mt, bool intern_if_not_found, TRAPS);
1142 static void print_signature(oop mt, outputStream* st);
1143
1144 static bool is_instance(oop obj);
1145
1146 static bool equals(oop mt1, oop mt2);
1147
1148 // Accessors for code generation:
1149 static int rtype_offset_in_bytes() { return _rtype_offset; }
1150 static int ptypes_offset_in_bytes() { return _ptypes_offset; }
1151 };
1152
1153
1154 // Interface to java.lang.invoke.CallSite objects
1155
1156 class java_lang_invoke_CallSite: AllStatic {
1157 friend class JavaClasses;
1158
1159 private:
1160 static int _target_offset;
1161 static int _context_offset;
1162
1163 static void compute_offsets();
1164
1165 public:
1166 // Accessors
1167 static oop target( oop site);
1168 static void set_target( oop site, oop target);
1169 static void set_target_volatile( oop site, oop target);
1170
1171 static oop context(oop site);
1172
1173 // Testers
1174 static bool is_subclass(Klass* klass) {
1175 return klass->is_subclass_of(SystemDictionary::CallSite_klass());
1176 }
1177 static bool is_instance(oop obj);
1178
1179 // Accessors for code generation:
1180 static int target_offset_in_bytes() { return _target_offset; }
1181 };
1182
1183 // Interface to java.lang.invoke.MethodHandleNatives$CallSiteContext objects
1184
1185 #define CALLSITECONTEXT_INJECTED_FIELDS(macro) \
1186 macro(java_lang_invoke_MethodHandleNatives_CallSiteContext, vmdependencies, intptr_signature, false)
1187
1188 class DependencyContext;
1189
1190 class java_lang_invoke_MethodHandleNatives_CallSiteContext : AllStatic {
1191 friend class JavaClasses;
1192
1193 private:
1194 static int _vmdependencies_offset;
1195
1196 static void compute_offsets();
1197
1198 public:
1199 // Accessors
1200 static DependencyContext vmdependencies(oop context);
1201
1202 // Testers
1203 static bool is_subclass(Klass* klass) {
1204 return klass->is_subclass_of(SystemDictionary::Context_klass());
1205 }
1206 static bool is_instance(oop obj);
1207 };
1208
1209 // Interface to java.security.AccessControlContext objects
1210
1211 class java_security_AccessControlContext: AllStatic {
1212 private:
1213 // Note that for this class the layout changed between JDK1.2 and JDK1.3,
1214 // so we compute the offsets at startup rather than hard-wiring them.
1215 static int _context_offset;
1216 static int _privilegedContext_offset;
1217 static int _isPrivileged_offset;
1218 static int _isAuthorized_offset;
1219
1220 static void compute_offsets();
1221 public:
1222 static oop create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS);
1223
1224 static bool is_authorized(Handle context);
1225
1226 // Debugging/initialization
1227 friend class JavaClasses;
1228 };
1229
1230
1231 // Interface to java.lang.ClassLoader objects
1232
1233 #define CLASSLOADER_INJECTED_FIELDS(macro) \
1234 macro(java_lang_ClassLoader, loader_data, intptr_signature, false)
1235
1236 class java_lang_ClassLoader : AllStatic {
1237 private:
1238 // The fake offsets are added by the class loader when java.lang.Class is loaded
1239 enum {
1240 hc_parent_offset = 0
1241 };
1242 static int _loader_data_offset;
1243 static bool offsets_computed;
1244 static int parent_offset;
1245 static int parallelCapable_offset;
1246 static int unnamedModule_offset;
1247
1248 public:
1249 static void compute_offsets();
1250
1251 static ClassLoaderData** loader_data_addr(oop loader);
1252 static ClassLoaderData* loader_data(oop loader);
1253
1254 static oop parent(oop loader);
1255 static bool isAncestor(oop loader, oop cl);
1256
1257 // Support for parallelCapable field
1258 static bool parallelCapable(oop the_class_mirror);
1259
1260 static bool is_trusted_loader(oop loader);
1261
1262 // Fix for 4474172
1263 static oop non_reflection_class_loader(oop loader);
1264
1265 // Testers
1266 static bool is_subclass(Klass* klass) {
1267 return klass->is_subclass_of(SystemDictionary::ClassLoader_klass());
1268 }
1269 static bool is_instance(oop obj);
1270
1271 static oop unnamedModule(oop loader);
1272
1273 // Debugging
1274 friend class JavaClasses;
1275 friend class ClassFileParser; // access to number_of_fake_fields
1276 };
1277
1278
1279 // Interface to java.lang.System objects
1280
1281 class java_lang_System : AllStatic {
1282 private:
1283 enum {
1284 hc_static_in_offset = 0,
1285 hc_static_out_offset = 1,
1286 hc_static_err_offset = 2,
1287 hc_static_security_offset = 3
1288 };
1289
1290 static int static_in_offset;
1291 static int static_out_offset;
1292 static int static_err_offset;
1293 static int static_security_offset;
1294
1295 public:
1296 static int in_offset_in_bytes();
1297 static int out_offset_in_bytes();
1298 static int err_offset_in_bytes();
1299
1300 static bool has_security_manager();
1301
1302 // Debugging
1303 friend class JavaClasses;
1304 };
1305
1306
1307 // Interface to java.lang.StackTraceElement objects
1308
1309 class java_lang_StackTraceElement: AllStatic {
1310 private:
1311 enum {
1312 hc_moduleName_offset = 0,
1313 hc_moduleVersion_offset = 1,
1314 hc_declaringClass_offset = 2,
1315 hc_methodName_offset = 3,
1316 hc_fileName_offset = 4,
1317 hc_lineNumber_offset = 5
1318 };
1319
1320 static int moduleName_offset;
1321 static int moduleVersion_offset;
1322 static int declaringClass_offset;
1323 static int methodName_offset;
1324 static int fileName_offset;
1325 static int lineNumber_offset;
1326
1327 // Setters
1328 static void set_moduleName(oop element, oop value);
1329 static void set_moduleVersion(oop element, oop value);
1330 static void set_declaringClass(oop element, oop value);
1331 static void set_methodName(oop element, oop value);
1332 static void set_fileName(oop element, oop value);
1333 static void set_lineNumber(oop element, int value);
1334
1335 public:
1336 // Create an instance of StackTraceElement
1337 static oop create(const methodHandle& method, int bci, TRAPS);
1338
1339 static void fill_in(Handle element, InstanceKlass* holder, const methodHandle& method,
1340 int version, int bci, int cpref, TRAPS);
1341
1342 // Debugging
1343 friend class JavaClasses;
1344 };
1345
1346
1347 class Backtrace: AllStatic {
1348 public:
1349 // Helper backtrace functions to store bci|version together.
1350 static int merge_bci_and_version(int bci, int version);
1351 static int merge_mid_and_cpref(int mid, int cpref);
1352 static int bci_at(unsigned int merged);
1353 static int version_at(unsigned int merged);
1354 static int mid_at(unsigned int merged);
1355 static int cpref_at(unsigned int merged);
1356 static int get_line_number(const methodHandle& method, int bci);
1357 static Symbol* get_source_file_name(InstanceKlass* holder, int version);
1358
1359 // Debugging
1360 friend class JavaClasses;
1361 };
1362
1363 // Interface to java.lang.StackFrameInfo objects
1364
1365 #define STACKFRAMEINFO_INJECTED_FIELDS(macro) \
1366 macro(java_lang_StackFrameInfo, version, short_signature, false)
1367
1368 class java_lang_StackFrameInfo: AllStatic {
1369 private:
1370 static int _declaringClass_offset;
1371 static int _memberName_offset;
1372 static int _bci_offset;
1373 static int _version_offset;
1374
1375 static Method* get_method(Handle stackFrame, InstanceKlass* holder, TRAPS);
1376
1377 public:
1378 // Setters
1379 static void set_declaringClass(oop info, oop value);
1380 static void set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci);
1381 static void set_bci(oop info, int value);
1382
1383 static void set_version(oop info, short value);
1384
1385 static void compute_offsets();
1386
1387 static void to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS);
1388
1389 // Debugging
1390 friend class JavaClasses;
1391 };
1392
1393 class java_lang_LiveStackFrameInfo: AllStatic {
1394 private:
1395 static int _monitors_offset;
1396 static int _locals_offset;
1397 static int _operands_offset;
1398
1399 public:
1400 static void set_monitors(oop info, oop value);
1401 static void set_locals(oop info, oop value);
1402 static void set_operands(oop info, oop value);
1403
1404 static void compute_offsets();
1405
1406 // Debugging
1407 friend class JavaClasses;
1408 };
1409
1410 // Interface to java.lang.AssertionStatusDirectives objects
1411
1412 class java_lang_AssertionStatusDirectives: AllStatic {
1413 private:
1414 enum {
1415 hc_classes_offset,
1416 hc_classEnabled_offset,
1417 hc_packages_offset,
1418 hc_packageEnabled_offset,
1419 hc_deflt_offset
1420 };
1421
1422 static int classes_offset;
1423 static int classEnabled_offset;
1424 static int packages_offset;
1425 static int packageEnabled_offset;
1426 static int deflt_offset;
1427
1428 public:
1429 // Setters
1430 static void set_classes(oop obj, oop val);
1431 static void set_classEnabled(oop obj, oop val);
1432 static void set_packages(oop obj, oop val);
1433 static void set_packageEnabled(oop obj, oop val);
1434 static void set_deflt(oop obj, bool val);
1435 // Debugging
1436 friend class JavaClasses;
1437 };
1438
1439
1440 class java_nio_Buffer: AllStatic {
1441 private:
1442 static int _limit_offset;
1443
1444 public:
1445 static int limit_offset();
1446 static void compute_offsets();
1447 };
1448
1449 class java_util_concurrent_locks_AbstractOwnableSynchronizer : AllStatic {
1450 private:
1451 static int _owner_offset;
1452 public:
1453 static void initialize(TRAPS);
1454 static oop get_owner_threadObj(oop obj);
1455 };
1456
1457 // Use to declare fields that need to be injected into Java classes
1458 // for the JVM to use. The name_index and signature_index are
1459 // declared in vmSymbols. The may_be_java flag is used to declare
1460 // fields that might already exist in Java but should be injected if
1461 // they don't. Otherwise the field is unconditionally injected and
1462 // the JVM uses the injected one. This is to ensure that name
1463 // collisions don't occur. In general may_be_java should be false
1464 // unless there's a good reason.
1465
1466 class InjectedField {
1467 public:
1468 const SystemDictionary::WKID klass_id;
1469 const vmSymbols::SID name_index;
1470 const vmSymbols::SID signature_index;
1471 const bool may_be_java;
1472
1473
1474 Klass* klass() const { return SystemDictionary::well_known_klass(klass_id); }
1475 Symbol* name() const { return lookup_symbol(name_index); }
1476 Symbol* signature() const { return lookup_symbol(signature_index); }
1477
1478 int compute_offset();
1479
1480 // Find the Symbol for this index
1481 static Symbol* lookup_symbol(int symbol_index) {
1482 return vmSymbols::symbol_at((vmSymbols::SID)symbol_index);
1483 }
1484 };
1485
1486 #define DECLARE_INJECTED_FIELD_ENUM(klass, name, signature, may_be_java) \
1487 klass##_##name##_enum,
1488
1489 #define ALL_INJECTED_FIELDS(macro) \
1490 CLASS_INJECTED_FIELDS(macro) \
1491 CLASSLOADER_INJECTED_FIELDS(macro) \
1492 MEMBERNAME_INJECTED_FIELDS(macro) \
1493 CALLSITECONTEXT_INJECTED_FIELDS(macro) \
1494 STACKFRAMEINFO_INJECTED_FIELDS(macro) \
1495 MODULE_INJECTED_FIELDS(macro)
1496
1497 // Interface to hard-coded offset checking
1498
1499 class JavaClasses : AllStatic {
1500 private:
1501
1502 static InjectedField _injected_fields[];
1503
1504 static bool check_offset(const char *klass_name, int offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1505 static bool check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1506 static bool check_constant(const char *klass_name, int constant, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1507
1508 public:
1509 enum InjectedFieldID {
1510 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD_ENUM)
1511 MAX_enum
1512 };
1513
1514 static int compute_injected_offset(InjectedFieldID id);
1515
1516 static void compute_hard_coded_offsets();
1517 static void compute_offsets();
1518 static void check_offsets() PRODUCT_RETURN;
1519
1520 static InjectedField* get_injected(Symbol* class_name, int* field_count);
1521 };
1522
1523 #undef DECLARE_INJECTED_FIELD_ENUM
1524
1525 #endif // SHARE_VM_CLASSFILE_JAVACLASSES_HPP