1 /*
2 * Copyright 1997-2007 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24
25 // Interface for manipulating the basic Java classes.
26 //
27 // All dependencies on layout of actual Java classes should be kept here.
28 // If the layout of any of the classes above changes the offsets must be adjusted.
29 //
30 // For most classes we hardwire the offsets for performance reasons. In certain
31 // cases (e.g. java.security.AccessControlContext) we compute the offsets at
32 // startup since the layout here differs between JDK1.2 and JDK1.3.
33 //
34 // Note that fields (static and non-static) are arranged with oops before non-oops
35 // on a per class basis. The offsets below have to reflect this ordering.
36 //
37 // When editing the layouts please update the check_offset verification code
38 // correspondingly. The names in the enums must be identical to the actual field
39 // names in order for the verification code to work.
40
41
42 // Interface to java.lang.String objects
43
44 class java_lang_String : AllStatic {
45 private:
46 enum {
47 hc_value_offset = 0,
48 hc_offset_offset = 1
49 //hc_count_offset = 2 -- not a word-scaled offset
50 //hc_hash_offset = 3 -- not a word-scaled offset
51 };
52
53 static int value_offset;
54 static int offset_offset;
55 static int count_offset;
56 static int hash_offset;
57
58 static Handle basic_create(int length, bool tenured, TRAPS);
59 static Handle basic_create_from_unicode(jchar* unicode, int length, bool tenured, TRAPS);
60
61 static void set_value( oop string, typeArrayOop buffer) { string->obj_field_put(value_offset, (oop)buffer); }
62 static void set_offset(oop string, int offset) { string->int_field_put(offset_offset, offset); }
63 static void set_count( oop string, int count) { string->int_field_put(count_offset, count); }
64
65 public:
66 // Instance creation
67 static Handle create_from_unicode(jchar* unicode, int len, TRAPS);
68 static Handle create_tenured_from_unicode(jchar* unicode, int len, TRAPS);
69 static oop create_oop_from_unicode(jchar* unicode, int len, TRAPS);
70 static Handle create_from_str(const char* utf8_str, TRAPS);
71 static oop create_oop_from_str(const char* utf8_str, TRAPS);
72 static Handle create_from_symbol(symbolHandle symbol, TRAPS);
73 static Handle create_from_platform_dependent_str(const char* str, TRAPS);
74 static Handle char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS);
75
76 static int value_offset_in_bytes() { return value_offset; }
77 static int count_offset_in_bytes() { return count_offset; }
78 static int offset_offset_in_bytes() { return offset_offset; }
79 static int hash_offset_in_bytes() { return hash_offset; }
80
81 // Accessors
82 static typeArrayOop value(oop java_string) {
83 assert(is_instance(java_string), "must be java_string");
84 return (typeArrayOop) java_string->obj_field(value_offset);
85 }
86 static int offset(oop java_string) {
87 assert(is_instance(java_string), "must be java_string");
88 return java_string->int_field(offset_offset);
89 }
90 static int length(oop java_string) {
91 assert(is_instance(java_string), "must be java_string");
92 return java_string->int_field(count_offset);
93 }
94 static int utf8_length(oop java_string);
95
96 // String converters
97 static char* as_utf8_string(oop java_string);
98 static char* as_utf8_string(oop java_string, int start, int len);
99 static jchar* as_unicode_string(oop java_string, int& length);
100
101 static bool equals(oop java_string, jchar* chars, int len);
102
103 // Conversion between '.' and '/' formats
104 static Handle externalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '/', '.', THREAD); }
105 static Handle internalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '.', '/', THREAD); }
106
107 // Conversion
108 static symbolHandle as_symbol(Handle java_string, TRAPS);
109
110 // Testers
111 static bool is_instance(oop obj) {
112 return obj != NULL && obj->klass() == SystemDictionary::string_klass();
113 }
114
115 // Debugging
116 static void print(Handle java_string, outputStream* st);
117 friend class JavaClasses;
118 };
119
120
121 // Interface to java.lang.Class objects
122
123 class java_lang_Class : AllStatic {
124 friend class VMStructs;
125 private:
126 // The fake offsets are added by the class loader when java.lang.Class is loaded
127
128 enum {
129 hc_klass_offset = 0,
130 hc_array_klass_offset = 1,
131 hc_resolved_constructor_offset = 2,
132 hc_number_of_fake_oop_fields = 3
133 };
134
135 static int klass_offset;
136 static int resolved_constructor_offset;
137 static int array_klass_offset;
138 static int number_of_fake_oop_fields;
139
140 static void compute_offsets();
141 static bool offsets_computed;
142 static int classRedefinedCount_offset;
143
144 public:
145 // Instance creation
146 static oop create_mirror(KlassHandle k, TRAPS);
147 static oop create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS);
148 // Conversion
149 static klassOop as_klassOop(oop java_class);
150 // Testing
151 static bool is_primitive(oop java_class);
152 static BasicType primitive_type(oop java_class);
153 static oop primitive_mirror(BasicType t);
154 // JVM_NewInstance support
155 static methodOop resolved_constructor(oop java_class);
156 static void set_resolved_constructor(oop java_class, methodOop constructor);
157 // JVM_NewArray support
158 static klassOop array_klass(oop java_class);
159 static void set_array_klass(oop java_class, klassOop klass);
160 // compiler support for class operations
161 static int klass_offset_in_bytes() { return klass_offset; }
162 static int resolved_constructor_offset_in_bytes() { return resolved_constructor_offset; }
163 static int array_klass_offset_in_bytes() { return array_klass_offset; }
164 // Support for classRedefinedCount field
165 static int classRedefinedCount(oop the_class_mirror);
166 static void set_classRedefinedCount(oop the_class_mirror, int value);
167 // Debugging
168 friend class JavaClasses;
169 friend class instanceKlass; // verification code accesses offsets
170 friend class ClassFileParser; // access to number_of_fake_fields
171 };
172
173 // Interface to java.lang.Thread objects
174
175 class java_lang_Thread : AllStatic {
176 private:
177 // Note that for this class the layout changed between JDK1.2 and JDK1.3,
178 // so we compute the offsets at startup rather than hard-wiring them.
179 static int _name_offset;
180 static int _group_offset;
181 static int _contextClassLoader_offset;
182 static int _inheritedAccessControlContext_offset;
183 static int _priority_offset;
184 static int _eetop_offset;
185 static int _daemon_offset;
186 static int _stillborn_offset;
187 static int _stackSize_offset;
188 static int _tid_offset;
189 static int _thread_status_offset;
190 static int _park_blocker_offset;
191 static int _park_event_offset ;
192
193 static void compute_offsets();
194
195 public:
196 // Instance creation
197 static oop create();
198 // Returns the JavaThread associated with the thread obj
199 static JavaThread* thread(oop java_thread);
200 // Set JavaThread for instance
201 static void set_thread(oop java_thread, JavaThread* thread);
202 // Name
203 static typeArrayOop name(oop java_thread);
204 static void set_name(oop java_thread, typeArrayOop name);
205 // Priority
206 static ThreadPriority priority(oop java_thread);
207 static void set_priority(oop java_thread, ThreadPriority priority);
208 // Thread group
209 static oop threadGroup(oop java_thread);
210 // Stillborn
211 static bool is_stillborn(oop java_thread);
212 static void set_stillborn(oop java_thread);
213 // Alive (NOTE: this is not really a field, but provides the correct
214 // definition without doing a Java call)
215 static bool is_alive(oop java_thread);
216 // Daemon
217 static bool is_daemon(oop java_thread);
218 static void set_daemon(oop java_thread);
219 // Context ClassLoader
220 static oop context_class_loader(oop java_thread);
221 // Control context
222 static oop inherited_access_control_context(oop java_thread);
223 // Stack size hint
224 static jlong stackSize(oop java_thread);
225 // Thread ID
226 static jlong thread_id(oop java_thread);
227
228 // Blocker object responsible for thread parking
229 static oop park_blocker(oop java_thread);
230
231 // Pointer to type-stable park handler, encoded as jlong.
232 // Should be set when apparently null
233 // For details, see unsafe.cpp Unsafe_Unpark
234 static jlong park_event(oop java_thread);
235 static bool set_park_event(oop java_thread, jlong ptr);
236
237 // Java Thread Status for JVMTI and M&M use.
238 // This thread status info is saved in threadStatus field of
239 // java.lang.Thread java class.
240 enum ThreadStatus {
241 NEW = 0,
242 RUNNABLE = JVMTI_THREAD_STATE_ALIVE + // runnable / running
243 JVMTI_THREAD_STATE_RUNNABLE,
244 SLEEPING = JVMTI_THREAD_STATE_ALIVE + // Thread.sleep()
245 JVMTI_THREAD_STATE_WAITING +
246 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
247 JVMTI_THREAD_STATE_SLEEPING,
248 IN_OBJECT_WAIT = JVMTI_THREAD_STATE_ALIVE + // Object.wait()
249 JVMTI_THREAD_STATE_WAITING +
250 JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
251 JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
252 IN_OBJECT_WAIT_TIMED = JVMTI_THREAD_STATE_ALIVE + // Object.wait(long)
253 JVMTI_THREAD_STATE_WAITING +
254 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
255 JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
256 PARKED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park()
257 JVMTI_THREAD_STATE_WAITING +
258 JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
259 JVMTI_THREAD_STATE_PARKED,
260 PARKED_TIMED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park(long)
261 JVMTI_THREAD_STATE_WAITING +
262 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
263 JVMTI_THREAD_STATE_PARKED,
264 BLOCKED_ON_MONITOR_ENTER = JVMTI_THREAD_STATE_ALIVE + // (re-)entering a synchronization block
265 JVMTI_THREAD_STATE_BLOCKED_ON_MONITOR_ENTER,
266 TERMINATED = JVMTI_THREAD_STATE_TERMINATED
267 };
268 // Write thread status info to threadStatus field of java.lang.Thread.
269 static void set_thread_status(oop java_thread_oop, ThreadStatus status);
270 // Read thread status info from threadStatus field of java.lang.Thread.
271 static ThreadStatus get_thread_status(oop java_thread_oop);
272
273 static const char* thread_status_name(oop java_thread_oop);
274
275 // Debugging
276 friend class JavaClasses;
277 };
278
279 // Interface to java.lang.ThreadGroup objects
280
281 class java_lang_ThreadGroup : AllStatic {
282 private:
283 static int _parent_offset;
284 static int _name_offset;
285 static int _threads_offset;
286 static int _groups_offset;
287 static int _maxPriority_offset;
288 static int _destroyed_offset;
289 static int _daemon_offset;
290 static int _vmAllowSuspension_offset;
291 static int _nthreads_offset;
292 static int _ngroups_offset;
293
294 static void compute_offsets();
295
296 public:
297 // parent ThreadGroup
298 static oop parent(oop java_thread_group);
299 // name
300 static typeArrayOop name(oop java_thread_group);
301 // ("name as oop" accessor is not necessary)
302 // Number of threads in group
303 static int nthreads(oop java_thread_group);
304 // threads
305 static objArrayOop threads(oop java_thread_group);
306 // Number of threads in group
307 static int ngroups(oop java_thread_group);
308 // groups
309 static objArrayOop groups(oop java_thread_group);
310 // maxPriority in group
311 static ThreadPriority maxPriority(oop java_thread_group);
312 // Destroyed
313 static bool is_destroyed(oop java_thread_group);
314 // Daemon
315 static bool is_daemon(oop java_thread_group);
316 // vmAllowSuspension
317 static bool is_vmAllowSuspension(oop java_thread_group);
318 // Debugging
319 friend class JavaClasses;
320 };
321
322
323
324 // Interface to java.lang.Throwable objects
325
326 class java_lang_Throwable: AllStatic {
327 friend class BacktraceBuilder;
328
329 private:
330 // Offsets
331 enum {
332 hc_backtrace_offset = 0,
333 hc_detailMessage_offset = 1,
334 hc_cause_offset = 2, // New since 1.4
335 hc_stackTrace_offset = 3 // New since 1.4
336 };
337 // Trace constants
338 enum {
339 trace_methods_offset = 0,
340 trace_bcis_offset = 1,
341 trace_next_offset = 2,
342 trace_size = 3,
343 trace_chunk_size = 32
344 };
345
346 static int backtrace_offset;
347 static int detailMessage_offset;
348 static int cause_offset;
349 static int stackTrace_offset;
350
351 // Printing
352 static char* print_stack_element_to_buffer(methodOop method, int bci);
353 static void print_to_stream(Handle stream, const char* str);
354 // StackTrace (programmatic access, new since 1.4)
355 static void clear_stacktrace(oop throwable);
356 // No stack trace available
357 static const char* no_stack_trace_message();
358
359 public:
360 // Backtrace
361 static oop backtrace(oop throwable);
362 static void set_backtrace(oop throwable, oop value);
363 // Needed by JVMTI to filter out this internal field.
364 static int get_backtrace_offset() { return backtrace_offset;}
365 static int get_detailMessage_offset() { return detailMessage_offset;}
366 // Message
367 static oop message(oop throwable);
368 static oop message(Handle throwable);
369 static void set_message(oop throwable, oop value);
370 // Print stack trace stored in exception by call-back to Java
371 // Note: this is no longer used in Merlin, but we still suppport
372 // it for compatibility.
373 static void print_stack_trace(oop throwable, oop print_stream);
374 static void print_stack_element(Handle stream, methodOop method, int bci);
375 static void print_stack_element(outputStream *st, methodOop method, int bci);
376 static void print_stack_usage(Handle stream);
377
378 // Allocate space for backtrace (created but stack trace not filled in)
379 static void allocate_backtrace(Handle throwable, TRAPS);
380 // Fill in current stack trace for throwable with preallocated backtrace (no GC)
381 static void fill_in_stack_trace_of_preallocated_backtrace(Handle throwable);
382
383 // Fill in current stack trace, can cause GC
384 static void fill_in_stack_trace(Handle throwable, TRAPS);
385 static void fill_in_stack_trace(Handle throwable);
386 // Programmatic access to stack trace
387 static oop get_stack_trace_element(oop throwable, int index, TRAPS);
388 static int get_stack_trace_depth(oop throwable, TRAPS);
389 // Printing
390 static void print(oop throwable, outputStream* st);
391 static void print(Handle throwable, outputStream* st);
392 static void print_stack_trace(oop throwable, outputStream* st);
393 // Debugging
394 friend class JavaClasses;
395 };
396
397
398 // Interface to java.lang.reflect.AccessibleObject objects
399
400 class java_lang_reflect_AccessibleObject: AllStatic {
401 private:
402 // Note that to reduce dependencies on the JDK we compute these
403 // offsets at run-time.
404 static int override_offset;
405
406 static void compute_offsets();
407
408 public:
409 // Accessors
410 static jboolean override(oop reflect);
411 static void set_override(oop reflect, jboolean value);
412
413 // Debugging
414 friend class JavaClasses;
415 };
416
417
418 // Interface to java.lang.reflect.Method objects
419
420 class java_lang_reflect_Method : public java_lang_reflect_AccessibleObject {
421 private:
422 // Note that to reduce dependencies on the JDK we compute these
423 // offsets at run-time.
424 static int clazz_offset;
425 static int name_offset;
426 static int returnType_offset;
427 static int parameterTypes_offset;
428 static int exceptionTypes_offset;
429 static int slot_offset;
430 static int modifiers_offset;
431 static int signature_offset;
432 static int annotations_offset;
433 static int parameter_annotations_offset;
434 static int annotation_default_offset;
435
436 static void compute_offsets();
437
438 public:
439 // Allocation
440 static Handle create(TRAPS);
441
442 // Accessors
443 static oop clazz(oop reflect);
444 static void set_clazz(oop reflect, oop value);
445
446 static oop name(oop method);
447 static void set_name(oop method, oop value);
448
449 static oop return_type(oop method);
450 static void set_return_type(oop method, oop value);
451
452 static oop parameter_types(oop method);
453 static void set_parameter_types(oop method, oop value);
454
455 static oop exception_types(oop method);
456 static void set_exception_types(oop method, oop value);
457
458 static int slot(oop reflect);
459 static void set_slot(oop reflect, int value);
460
461 static int modifiers(oop method);
462 static void set_modifiers(oop method, int value);
463
464 static bool has_signature_field();
465 static oop signature(oop method);
466 static void set_signature(oop method, oop value);
467
468 static bool has_annotations_field();
469 static oop annotations(oop method);
470 static void set_annotations(oop method, oop value);
471
472 static bool has_parameter_annotations_field();
473 static oop parameter_annotations(oop method);
474 static void set_parameter_annotations(oop method, oop value);
475
476 static bool has_annotation_default_field();
477 static oop annotation_default(oop method);
478 static void set_annotation_default(oop method, oop value);
479
480 // Debugging
481 friend class JavaClasses;
482 };
483
484
485 // Interface to java.lang.reflect.Constructor objects
486
487 class java_lang_reflect_Constructor : public java_lang_reflect_AccessibleObject {
488 private:
489 // Note that to reduce dependencies on the JDK we compute these
490 // offsets at run-time.
491 static int clazz_offset;
492 static int parameterTypes_offset;
493 static int exceptionTypes_offset;
494 static int slot_offset;
495 static int modifiers_offset;
496 static int signature_offset;
497 static int annotations_offset;
498 static int parameter_annotations_offset;
499
500 static void compute_offsets();
501
502 public:
503 // Allocation
504 static Handle create(TRAPS);
505
506 // Accessors
507 static oop clazz(oop reflect);
508 static void set_clazz(oop reflect, oop value);
509
510 static oop parameter_types(oop constructor);
511 static void set_parameter_types(oop constructor, oop value);
512
513 static oop exception_types(oop constructor);
514 static void set_exception_types(oop constructor, oop value);
515
516 static int slot(oop reflect);
517 static void set_slot(oop reflect, int value);
518
519 static int modifiers(oop constructor);
520 static void set_modifiers(oop constructor, int value);
521
522 static bool has_signature_field();
523 static oop signature(oop constructor);
524 static void set_signature(oop constructor, oop value);
525
526 static bool has_annotations_field();
527 static oop annotations(oop constructor);
528 static void set_annotations(oop constructor, oop value);
529
530 static bool has_parameter_annotations_field();
531 static oop parameter_annotations(oop method);
532 static void set_parameter_annotations(oop method, oop value);
533
534 // Debugging
535 friend class JavaClasses;
536 };
537
538
539 // Interface to java.lang.reflect.Field objects
540
541 class java_lang_reflect_Field : public java_lang_reflect_AccessibleObject {
542 private:
543 // Note that to reduce dependencies on the JDK we compute these
544 // offsets at run-time.
545 static int clazz_offset;
546 static int name_offset;
547 static int type_offset;
548 static int slot_offset;
549 static int modifiers_offset;
550 static int signature_offset;
551 static int annotations_offset;
552
553 static void compute_offsets();
554
555 public:
556 // Allocation
557 static Handle create(TRAPS);
558
559 // Accessors
560 static oop clazz(oop reflect);
561 static void set_clazz(oop reflect, oop value);
562
563 static oop name(oop field);
564 static void set_name(oop field, oop value);
565
566 static oop type(oop field);
567 static void set_type(oop field, oop value);
568
569 static int slot(oop reflect);
570 static void set_slot(oop reflect, int value);
571
572 static int modifiers(oop field);
573 static void set_modifiers(oop field, int value);
574
575 static bool has_signature_field();
576 static oop signature(oop constructor);
577 static void set_signature(oop constructor, oop value);
578
579 static bool has_annotations_field();
580 static oop annotations(oop constructor);
581 static void set_annotations(oop constructor, oop value);
582
583 static bool has_parameter_annotations_field();
584 static oop parameter_annotations(oop method);
585 static void set_parameter_annotations(oop method, oop value);
586
587 static bool has_annotation_default_field();
588 static oop annotation_default(oop method);
589 static void set_annotation_default(oop method, oop value);
590
591 // Debugging
592 friend class JavaClasses;
593 };
594
595 // Interface to sun.reflect.ConstantPool objects
596 class sun_reflect_ConstantPool {
597 private:
598 // Note that to reduce dependencies on the JDK we compute these
599 // offsets at run-time.
600 static int _cp_oop_offset;
601
602 static void compute_offsets();
603
604 public:
605 // Allocation
606 static Handle create(TRAPS);
607
608 // Accessors
609 static oop cp_oop(oop reflect);
610 static void set_cp_oop(oop reflect, oop value);
611 static int cp_oop_offset() {
612 return _cp_oop_offset;
613 }
614
615 // Debugging
616 friend class JavaClasses;
617 };
618
619 // Interface to sun.reflect.UnsafeStaticFieldAccessorImpl objects
620 class sun_reflect_UnsafeStaticFieldAccessorImpl {
621 private:
622 static int _base_offset;
623 static void compute_offsets();
624
625 public:
626 static int base_offset() {
627 return _base_offset;
628 }
629
630 // Debugging
631 friend class JavaClasses;
632 };
633
634 // Interface to java.lang primitive type boxing objects:
635 // - java.lang.Boolean
636 // - java.lang.Character
637 // - java.lang.Float
638 // - java.lang.Double
639 // - java.lang.Byte
640 // - java.lang.Short
641 // - java.lang.Integer
642 // - java.lang.Long
643
644 // This could be separated out into 8 individual classes.
645
646 class java_lang_boxing_object: AllStatic {
647 private:
648 enum {
649 hc_value_offset = 0
650 };
651 static int value_offset;
652
653 static oop initialize_and_allocate(klassOop klass, TRAPS);
654 public:
655 // Allocation. Returns a boxed value, or NULL for invalid type.
656 static oop create(BasicType type, jvalue* value, TRAPS);
657 // Accessors. Returns the basic type being boxed, or T_ILLEGAL for invalid oop.
658 static BasicType get_value(oop box, jvalue* value);
659 static BasicType set_value(oop box, jvalue* value);
660
661 static int value_offset_in_bytes() { return value_offset; }
662
663 // Debugging
664 friend class JavaClasses;
665 };
666
667
668
669 // Interface to java.lang.ref.Reference objects
670
671 class java_lang_ref_Reference: AllStatic {
672 public:
673 enum {
674 hc_referent_offset = 0,
675 hc_queue_offset = 1,
676 hc_next_offset = 2,
677 hc_discovered_offset = 3 // Is not last, see SoftRefs.
678 };
679 enum {
680 hc_static_lock_offset = 0,
681 hc_static_pending_offset = 1
682 };
683
684 static int referent_offset;
685 static int queue_offset;
686 static int next_offset;
687 static int discovered_offset;
688 static int static_lock_offset;
689 static int static_pending_offset;
690 static int number_of_fake_oop_fields;
691
692 // Accessors
693 static oop referent(oop ref) { return *referent_addr(ref); }
694 static void set_referent(oop ref, oop value);
695 static oop* referent_addr(oop ref);
696
697 static oop next(oop ref) { return *next_addr(ref); }
698 static void set_next(oop ref, oop value);
699 static oop* next_addr(oop ref);
700
701 static oop discovered(oop ref) { return *discovered_addr(ref); }
702 static void set_discovered(oop ref, oop value);
703 static oop* discovered_addr(oop ref);
704
705 // Accessors for statics
706 static oop pending_list_lock() { return *pending_list_lock_addr(); }
707 static oop pending_list() { return *pending_list_addr(); }
708
709 static oop* pending_list_lock_addr();
710 static oop* pending_list_addr();
711 };
712
713
714 // Interface to java.lang.ref.SoftReference objects
715
716 class java_lang_ref_SoftReference: public java_lang_ref_Reference {
717 public:
718 enum {
719 // The timestamp is a long field and may need to be adjusted for alignment.
720 hc_timestamp_offset = align_object_offset_(hc_discovered_offset + 1)
721 };
722 enum {
723 hc_static_clock_offset = 0
724 };
725
726 static int timestamp_offset;
727 static int static_clock_offset;
728
729 // Accessors
730 static jlong timestamp(oop ref);
731
732 // Accessors for statics
733 static jlong clock();
734 static void set_clock(jlong value);
735 };
736
737
738 // Interface to java.security.AccessControlContext objects
739
740 class java_security_AccessControlContext: AllStatic {
741 private:
742 // Note that for this class the layout changed between JDK1.2 and JDK1.3,
743 // so we compute the offsets at startup rather than hard-wiring them.
744 static int _context_offset;
745 static int _privilegedContext_offset;
746 static int _isPrivileged_offset;
747
748 static void compute_offsets();
749 public:
750 static oop create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS);
751
752 // Debugging/initialization
753 friend class JavaClasses;
754 };
755
756
757 // Interface to java.lang.ClassLoader objects
758
759 class java_lang_ClassLoader : AllStatic {
760 private:
761 enum {
762 hc_parent_offset = 0
763 };
764
765 static int parent_offset;
766
767 public:
768 static oop parent(oop loader);
769
770 static bool is_trusted_loader(oop loader);
771
772 // Fix for 4474172
773 static oop non_reflection_class_loader(oop loader);
774
775 // Debugging
776 friend class JavaClasses;
777 };
778
779
780 // Interface to java.lang.System objects
781
782 class java_lang_System : AllStatic {
783 private:
784 enum {
785 hc_static_in_offset = 0,
786 hc_static_out_offset = 1,
787 hc_static_err_offset = 2
788 };
789
790 static int offset_of_static_fields;
791 static int static_in_offset;
792 static int static_out_offset;
793 static int static_err_offset;
794
795 static void compute_offsets();
796
797 public:
798 static int in_offset_in_bytes();
799 static int out_offset_in_bytes();
800 static int err_offset_in_bytes();
801
802 // Debugging
803 friend class JavaClasses;
804 };
805
806
807 // Interface to java.lang.StackTraceElement objects
808
809 class java_lang_StackTraceElement: AllStatic {
810 private:
811 enum {
812 hc_declaringClass_offset = 0,
813 hc_methodName_offset = 1,
814 hc_fileName_offset = 2,
815 hc_lineNumber_offset = 3
816 };
817
818 static int declaringClass_offset;
819 static int methodName_offset;
820 static int fileName_offset;
821 static int lineNumber_offset;
822
823 public:
824 // Setters
825 static void set_declaringClass(oop element, oop value);
826 static void set_methodName(oop element, oop value);
827 static void set_fileName(oop element, oop value);
828 static void set_lineNumber(oop element, int value);
829
830 // Create an instance of StackTraceElement
831 static oop create(methodHandle m, int bci, TRAPS);
832
833 // Debugging
834 friend class JavaClasses;
835 };
836
837
838 // Interface to java.lang.AssertionStatusDirectives objects
839
840 class java_lang_AssertionStatusDirectives: AllStatic {
841 private:
842 enum {
843 hc_classes_offset,
844 hc_classEnabled_offset,
845 hc_packages_offset,
846 hc_packageEnabled_offset,
847 hc_deflt_offset
848 };
849
850 static int classes_offset;
851 static int classEnabled_offset;
852 static int packages_offset;
853 static int packageEnabled_offset;
854 static int deflt_offset;
855
856 public:
857 // Setters
858 static void set_classes(oop obj, oop val);
859 static void set_classEnabled(oop obj, oop val);
860 static void set_packages(oop obj, oop val);
861 static void set_packageEnabled(oop obj, oop val);
862 static void set_deflt(oop obj, bool val);
863 // Debugging
864 friend class JavaClasses;
865 };
866
867
868 class java_nio_Buffer: AllStatic {
869 private:
870 static int _limit_offset;
871
872 public:
873 static int limit_offset();
874 static void compute_offsets();
875 };
876
877 class sun_misc_AtomicLongCSImpl: AllStatic {
878 private:
879 static int _value_offset;
880
881 public:
882 static int value_offset();
883 static void compute_offsets();
884 };
885
886 class java_util_concurrent_locks_AbstractOwnableSynchronizer : AllStatic {
887 private:
888 static int _owner_offset;
889 public:
890 static void initialize(TRAPS);
891 static oop get_owner_threadObj(oop obj);
892 };
893
894 // Interface to hard-coded offset checking
895
896 class JavaClasses : AllStatic {
897 private:
898 static bool check_offset(const char *klass_name, int offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
899 static bool check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
900 static bool check_constant(const char *klass_name, int constant, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
901 public:
902 static void compute_hard_coded_offsets();
903 static void compute_offsets();
904 static void check_offsets() PRODUCT_RETURN;
905 };