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_instance(oop obj) {
152 return obj != NULL && obj->klass() == SystemDictionary::class_klass();
153 }
154 static bool is_primitive(oop java_class);
155 static BasicType primitive_type(oop java_class);
156 static oop primitive_mirror(BasicType t);
157 // JVM_NewInstance support
158 static methodOop resolved_constructor(oop java_class);
159 static void set_resolved_constructor(oop java_class, methodOop constructor);
160 // JVM_NewArray support
161 static klassOop array_klass(oop java_class);
162 static void set_array_klass(oop java_class, klassOop klass);
163 // compiler support for class operations
164 static int klass_offset_in_bytes() { return klass_offset; }
165 static int resolved_constructor_offset_in_bytes() { return resolved_constructor_offset; }
166 static int array_klass_offset_in_bytes() { return array_klass_offset; }
167 // Support for classRedefinedCount field
168 static int classRedefinedCount(oop the_class_mirror);
169 static void set_classRedefinedCount(oop the_class_mirror, int value);
170 // Debugging
171 friend class JavaClasses;
172 friend class instanceKlass; // verification code accesses offsets
173 friend class ClassFileParser; // access to number_of_fake_fields
174 };
175
176 // Interface to java.lang.Thread objects
177
178 class java_lang_Thread : AllStatic {
179 private:
180 // Note that for this class the layout changed between JDK1.2 and JDK1.3,
181 // so we compute the offsets at startup rather than hard-wiring them.
182 static int _name_offset;
183 static int _group_offset;
184 static int _contextClassLoader_offset;
185 static int _inheritedAccessControlContext_offset;
186 static int _priority_offset;
187 static int _eetop_offset;
188 static int _daemon_offset;
189 static int _stillborn_offset;
190 static int _stackSize_offset;
191 static int _tid_offset;
192 static int _thread_status_offset;
193 static int _park_blocker_offset;
194 static int _park_event_offset ;
195
196 static void compute_offsets();
197
198 public:
199 // Instance creation
200 static oop create();
201 // Returns the JavaThread associated with the thread obj
202 static JavaThread* thread(oop java_thread);
203 // Set JavaThread for instance
204 static void set_thread(oop java_thread, JavaThread* thread);
205 // Name
206 static typeArrayOop name(oop java_thread);
207 static void set_name(oop java_thread, typeArrayOop name);
208 // Priority
209 static ThreadPriority priority(oop java_thread);
210 static void set_priority(oop java_thread, ThreadPriority priority);
211 // Thread group
212 static oop threadGroup(oop java_thread);
213 // Stillborn
214 static bool is_stillborn(oop java_thread);
215 static void set_stillborn(oop java_thread);
216 // Alive (NOTE: this is not really a field, but provides the correct
217 // definition without doing a Java call)
218 static bool is_alive(oop java_thread);
219 // Daemon
220 static bool is_daemon(oop java_thread);
221 static void set_daemon(oop java_thread);
222 // Context ClassLoader
223 static oop context_class_loader(oop java_thread);
224 // Control context
225 static oop inherited_access_control_context(oop java_thread);
226 // Stack size hint
227 static jlong stackSize(oop java_thread);
228 // Thread ID
229 static jlong thread_id(oop java_thread);
230
231 // Blocker object responsible for thread parking
232 static oop park_blocker(oop java_thread);
233
234 // Pointer to type-stable park handler, encoded as jlong.
235 // Should be set when apparently null
236 // For details, see unsafe.cpp Unsafe_Unpark
237 static jlong park_event(oop java_thread);
238 static bool set_park_event(oop java_thread, jlong ptr);
239
240 // Java Thread Status for JVMTI and M&M use.
241 // This thread status info is saved in threadStatus field of
242 // java.lang.Thread java class.
243 enum ThreadStatus {
244 NEW = 0,
245 RUNNABLE = JVMTI_THREAD_STATE_ALIVE + // runnable / running
246 JVMTI_THREAD_STATE_RUNNABLE,
247 SLEEPING = JVMTI_THREAD_STATE_ALIVE + // Thread.sleep()
248 JVMTI_THREAD_STATE_WAITING +
249 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
250 JVMTI_THREAD_STATE_SLEEPING,
251 IN_OBJECT_WAIT = JVMTI_THREAD_STATE_ALIVE + // Object.wait()
252 JVMTI_THREAD_STATE_WAITING +
253 JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
254 JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
255 IN_OBJECT_WAIT_TIMED = JVMTI_THREAD_STATE_ALIVE + // Object.wait(long)
256 JVMTI_THREAD_STATE_WAITING +
257 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
258 JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
259 PARKED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park()
260 JVMTI_THREAD_STATE_WAITING +
261 JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
262 JVMTI_THREAD_STATE_PARKED,
263 PARKED_TIMED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park(long)
264 JVMTI_THREAD_STATE_WAITING +
265 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
266 JVMTI_THREAD_STATE_PARKED,
267 BLOCKED_ON_MONITOR_ENTER = JVMTI_THREAD_STATE_ALIVE + // (re-)entering a synchronization block
268 JVMTI_THREAD_STATE_BLOCKED_ON_MONITOR_ENTER,
269 TERMINATED = JVMTI_THREAD_STATE_TERMINATED
270 };
271 // Write thread status info to threadStatus field of java.lang.Thread.
272 static void set_thread_status(oop java_thread_oop, ThreadStatus status);
273 // Read thread status info from threadStatus field of java.lang.Thread.
274 static ThreadStatus get_thread_status(oop java_thread_oop);
275
276 static const char* thread_status_name(oop java_thread_oop);
277
278 // Debugging
279 friend class JavaClasses;
280 };
281
282 // Interface to java.lang.ThreadGroup objects
283
284 class java_lang_ThreadGroup : AllStatic {
285 private:
286 static int _parent_offset;
287 static int _name_offset;
288 static int _threads_offset;
289 static int _groups_offset;
290 static int _maxPriority_offset;
291 static int _destroyed_offset;
292 static int _daemon_offset;
293 static int _vmAllowSuspension_offset;
294 static int _nthreads_offset;
295 static int _ngroups_offset;
296
297 static void compute_offsets();
298
299 public:
300 // parent ThreadGroup
301 static oop parent(oop java_thread_group);
302 // name
303 static typeArrayOop name(oop java_thread_group);
304 // ("name as oop" accessor is not necessary)
305 // Number of threads in group
306 static int nthreads(oop java_thread_group);
307 // threads
308 static objArrayOop threads(oop java_thread_group);
309 // Number of threads in group
310 static int ngroups(oop java_thread_group);
311 // groups
312 static objArrayOop groups(oop java_thread_group);
313 // maxPriority in group
314 static ThreadPriority maxPriority(oop java_thread_group);
315 // Destroyed
316 static bool is_destroyed(oop java_thread_group);
317 // Daemon
318 static bool is_daemon(oop java_thread_group);
319 // vmAllowSuspension
320 static bool is_vmAllowSuspension(oop java_thread_group);
321 // Debugging
322 friend class JavaClasses;
323 };
324
325
326
327 // Interface to java.lang.Throwable objects
328
329 class java_lang_Throwable: AllStatic {
330 friend class BacktraceBuilder;
331
332 private:
333 // Offsets
334 enum {
335 hc_backtrace_offset = 0,
336 hc_detailMessage_offset = 1,
337 hc_cause_offset = 2, // New since 1.4
338 hc_stackTrace_offset = 3 // New since 1.4
339 };
340 // Trace constants
341 enum {
342 trace_methods_offset = 0,
343 trace_bcis_offset = 1,
344 trace_next_offset = 2,
345 trace_size = 3,
346 trace_chunk_size = 32
347 };
348
349 static int backtrace_offset;
350 static int detailMessage_offset;
351 static int cause_offset;
352 static int stackTrace_offset;
353
354 // Printing
355 static char* print_stack_element_to_buffer(methodOop method, int bci);
356 static void print_to_stream(Handle stream, const char* str);
357 // StackTrace (programmatic access, new since 1.4)
358 static void clear_stacktrace(oop throwable);
359 // No stack trace available
360 static const char* no_stack_trace_message();
361
362 public:
363 // Backtrace
364 static oop backtrace(oop throwable);
365 static void set_backtrace(oop throwable, oop value);
366 // Needed by JVMTI to filter out this internal field.
367 static int get_backtrace_offset() { return backtrace_offset;}
368 static int get_detailMessage_offset() { return detailMessage_offset;}
369 // Message
370 static oop message(oop throwable);
371 static oop message(Handle throwable);
372 static void set_message(oop throwable, oop value);
373 // Print stack trace stored in exception by call-back to Java
374 // Note: this is no longer used in Merlin, but we still suppport
375 // it for compatibility.
376 static void print_stack_trace(oop throwable, oop print_stream);
377 static void print_stack_element(Handle stream, methodOop method, int bci);
378 static void print_stack_element(outputStream *st, methodOop method, int bci);
379 static void print_stack_usage(Handle stream);
380
381 // Allocate space for backtrace (created but stack trace not filled in)
382 static void allocate_backtrace(Handle throwable, TRAPS);
383 // Fill in current stack trace for throwable with preallocated backtrace (no GC)
384 static void fill_in_stack_trace_of_preallocated_backtrace(Handle throwable);
385
386 // Fill in current stack trace, can cause GC
387 static void fill_in_stack_trace(Handle throwable, TRAPS);
388 static void fill_in_stack_trace(Handle throwable);
389 // Programmatic access to stack trace
390 static oop get_stack_trace_element(oop throwable, int index, TRAPS);
391 static int get_stack_trace_depth(oop throwable, TRAPS);
392 // Printing
393 static void print(oop throwable, outputStream* st);
394 static void print(Handle throwable, outputStream* st);
395 static void print_stack_trace(oop throwable, outputStream* st);
396 // Debugging
397 friend class JavaClasses;
398 };
399
400
401 // Interface to java.lang.reflect.AccessibleObject objects
402
403 class java_lang_reflect_AccessibleObject: AllStatic {
404 private:
405 // Note that to reduce dependencies on the JDK we compute these
406 // offsets at run-time.
407 static int override_offset;
408
409 static void compute_offsets();
410
411 public:
412 // Accessors
413 static jboolean override(oop reflect);
414 static void set_override(oop reflect, jboolean value);
415
416 // Debugging
417 friend class JavaClasses;
418 };
419
420
421 // Interface to java.lang.reflect.Method objects
422
423 class java_lang_reflect_Method : public java_lang_reflect_AccessibleObject {
424 private:
425 // Note that to reduce dependencies on the JDK we compute these
426 // offsets at run-time.
427 static int clazz_offset;
428 static int name_offset;
429 static int returnType_offset;
430 static int parameterTypes_offset;
431 static int exceptionTypes_offset;
432 static int slot_offset;
433 static int modifiers_offset;
434 static int signature_offset;
435 static int annotations_offset;
436 static int parameter_annotations_offset;
437 static int annotation_default_offset;
438
439 static void compute_offsets();
440
441 public:
442 // Allocation
443 static Handle create(TRAPS);
444
445 // Accessors
446 static oop clazz(oop reflect);
447 static void set_clazz(oop reflect, oop value);
448
449 static oop name(oop method);
450 static void set_name(oop method, oop value);
451
452 static oop return_type(oop method);
453 static void set_return_type(oop method, oop value);
454
455 static oop parameter_types(oop method);
456 static void set_parameter_types(oop method, oop value);
457
458 static oop exception_types(oop method);
459 static void set_exception_types(oop method, oop value);
460
461 static int slot(oop reflect);
462 static void set_slot(oop reflect, int value);
463
464 static int modifiers(oop method);
465 static void set_modifiers(oop method, int value);
466
467 static bool has_signature_field();
468 static oop signature(oop method);
469 static void set_signature(oop method, oop value);
470
471 static bool has_annotations_field();
472 static oop annotations(oop method);
473 static void set_annotations(oop method, oop value);
474
475 static bool has_parameter_annotations_field();
476 static oop parameter_annotations(oop method);
477 static void set_parameter_annotations(oop method, oop value);
478
479 static bool has_annotation_default_field();
480 static oop annotation_default(oop method);
481 static void set_annotation_default(oop method, oop value);
482
483 // Debugging
484 friend class JavaClasses;
485 };
486
487
488 // Interface to java.lang.reflect.Constructor objects
489
490 class java_lang_reflect_Constructor : public java_lang_reflect_AccessibleObject {
491 private:
492 // Note that to reduce dependencies on the JDK we compute these
493 // offsets at run-time.
494 static int clazz_offset;
495 static int parameterTypes_offset;
496 static int exceptionTypes_offset;
497 static int slot_offset;
498 static int modifiers_offset;
499 static int signature_offset;
500 static int annotations_offset;
501 static int parameter_annotations_offset;
502
503 static void compute_offsets();
504
505 public:
506 // Allocation
507 static Handle create(TRAPS);
508
509 // Accessors
510 static oop clazz(oop reflect);
511 static void set_clazz(oop reflect, oop value);
512
513 static oop parameter_types(oop constructor);
514 static void set_parameter_types(oop constructor, oop value);
515
516 static oop exception_types(oop constructor);
517 static void set_exception_types(oop constructor, oop value);
518
519 static int slot(oop reflect);
520 static void set_slot(oop reflect, int value);
521
522 static int modifiers(oop constructor);
523 static void set_modifiers(oop constructor, int value);
524
525 static bool has_signature_field();
526 static oop signature(oop constructor);
527 static void set_signature(oop constructor, oop value);
528
529 static bool has_annotations_field();
530 static oop annotations(oop constructor);
531 static void set_annotations(oop constructor, oop value);
532
533 static bool has_parameter_annotations_field();
534 static oop parameter_annotations(oop method);
535 static void set_parameter_annotations(oop method, oop value);
536
537 // Debugging
538 friend class JavaClasses;
539 };
540
541
542 // Interface to java.lang.reflect.Field objects
543
544 class java_lang_reflect_Field : public java_lang_reflect_AccessibleObject {
545 private:
546 // Note that to reduce dependencies on the JDK we compute these
547 // offsets at run-time.
548 static int clazz_offset;
549 static int name_offset;
550 static int type_offset;
551 static int slot_offset;
552 static int modifiers_offset;
553 static int signature_offset;
554 static int annotations_offset;
555
556 static void compute_offsets();
557
558 public:
559 // Allocation
560 static Handle create(TRAPS);
561
562 // Accessors
563 static oop clazz(oop reflect);
564 static void set_clazz(oop reflect, oop value);
565
566 static oop name(oop field);
567 static void set_name(oop field, oop value);
568
569 static oop type(oop field);
570 static void set_type(oop field, oop value);
571
572 static int slot(oop reflect);
573 static void set_slot(oop reflect, int value);
574
575 static int modifiers(oop field);
576 static void set_modifiers(oop field, int value);
577
578 static bool has_signature_field();
579 static oop signature(oop constructor);
580 static void set_signature(oop constructor, oop value);
581
582 static bool has_annotations_field();
583 static oop annotations(oop constructor);
584 static void set_annotations(oop constructor, oop value);
585
586 static bool has_parameter_annotations_field();
587 static oop parameter_annotations(oop method);
588 static void set_parameter_annotations(oop method, oop value);
589
590 static bool has_annotation_default_field();
591 static oop annotation_default(oop method);
592 static void set_annotation_default(oop method, oop value);
593
594 // Debugging
595 friend class JavaClasses;
596 };
597
598 // Interface to sun.reflect.ConstantPool objects
599 class sun_reflect_ConstantPool {
600 private:
601 // Note that to reduce dependencies on the JDK we compute these
602 // offsets at run-time.
603 static int _cp_oop_offset;
604
605 static void compute_offsets();
606
607 public:
608 // Allocation
609 static Handle create(TRAPS);
610
611 // Accessors
612 static oop cp_oop(oop reflect);
613 static void set_cp_oop(oop reflect, oop value);
614 static int cp_oop_offset() {
615 return _cp_oop_offset;
616 }
617
618 // Debugging
619 friend class JavaClasses;
620 };
621
622 // Interface to sun.reflect.UnsafeStaticFieldAccessorImpl objects
623 class sun_reflect_UnsafeStaticFieldAccessorImpl {
624 private:
625 static int _base_offset;
626 static void compute_offsets();
627
628 public:
629 static int base_offset() {
630 return _base_offset;
631 }
632
633 // Debugging
634 friend class JavaClasses;
635 };
636
637 // Interface to java.lang primitive type boxing objects:
638 // - java.lang.Boolean
639 // - java.lang.Character
640 // - java.lang.Float
641 // - java.lang.Double
642 // - java.lang.Byte
643 // - java.lang.Short
644 // - java.lang.Integer
645 // - java.lang.Long
646
647 // This could be separated out into 8 individual classes.
648
649 class java_lang_boxing_object: AllStatic {
650 private:
651 enum {
652 hc_value_offset = 0
653 };
654 static int value_offset;
655
656 static oop initialize_and_allocate(BasicType type, TRAPS);
657 public:
658 // Allocation. Returns a boxed value, or NULL for invalid type.
659 static oop create(BasicType type, jvalue* value, TRAPS);
660 // Accessors. Returns the basic type being boxed, or T_ILLEGAL for invalid oop.
661 static BasicType get_value(oop box, jvalue* value);
662 static BasicType set_value(oop box, jvalue* value);
663 static BasicType basic_type(oop box);
664 static bool is_instance(oop box) { return basic_type(box) != T_ILLEGAL; }
665 static bool is_instance(oop box, BasicType type) { return basic_type(box) == type; }
666
667 static int value_offset_in_bytes() { return value_offset; }
668
669 // Debugging
670 friend class JavaClasses;
671 };
672
673
674
675 // Interface to java.lang.ref.Reference objects
676
677 class java_lang_ref_Reference: AllStatic {
678 public:
679 enum {
680 hc_referent_offset = 0,
681 hc_queue_offset = 1,
682 hc_next_offset = 2,
683 hc_discovered_offset = 3 // Is not last, see SoftRefs.
684 };
685 enum {
686 hc_static_lock_offset = 0,
687 hc_static_pending_offset = 1
688 };
689
690 static int referent_offset;
691 static int queue_offset;
692 static int next_offset;
693 static int discovered_offset;
694 static int static_lock_offset;
695 static int static_pending_offset;
696 static int number_of_fake_oop_fields;
697
698 // Accessors
699 static oop referent(oop ref) { return *referent_addr(ref); }
700 static void set_referent(oop ref, oop value);
701 static oop* referent_addr(oop ref);
702
703 static oop next(oop ref) { return *next_addr(ref); }
704 static void set_next(oop ref, oop value);
705 static oop* next_addr(oop ref);
706
707 static oop discovered(oop ref) { return *discovered_addr(ref); }
708 static void set_discovered(oop ref, oop value);
709 static oop* discovered_addr(oop ref);
710
711 // Accessors for statics
712 static oop pending_list_lock() { return *pending_list_lock_addr(); }
713 static oop pending_list() { return *pending_list_addr(); }
714
715 static oop* pending_list_lock_addr();
716 static oop* pending_list_addr();
717 };
718
719
720 // Interface to java.lang.ref.SoftReference objects
721
722 class java_lang_ref_SoftReference: public java_lang_ref_Reference {
723 public:
724 enum {
725 // The timestamp is a long field and may need to be adjusted for alignment.
726 hc_timestamp_offset = align_object_offset_(hc_discovered_offset + 1)
727 };
728 enum {
729 hc_static_clock_offset = 0
730 };
731
732 static int timestamp_offset;
733 static int static_clock_offset;
734
735 // Accessors
736 static jlong timestamp(oop ref);
737
738 // Accessors for statics
739 static jlong clock();
740 static void set_clock(jlong value);
741 };
742
743
744 // Interface to java.security.AccessControlContext objects
745
746 class java_security_AccessControlContext: AllStatic {
747 private:
748 // Note that for this class the layout changed between JDK1.2 and JDK1.3,
749 // so we compute the offsets at startup rather than hard-wiring them.
750 static int _context_offset;
751 static int _privilegedContext_offset;
752 static int _isPrivileged_offset;
753
754 static void compute_offsets();
755 public:
756 static oop create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS);
757
758 // Debugging/initialization
759 friend class JavaClasses;
760 };
761
762
763 // Interface to java.lang.ClassLoader objects
764
765 class java_lang_ClassLoader : AllStatic {
766 private:
767 enum {
768 hc_parent_offset = 0
769 };
770
771 static int parent_offset;
772
773 public:
774 static oop parent(oop loader);
775
776 static bool is_trusted_loader(oop loader);
777
778 // Fix for 4474172
779 static oop non_reflection_class_loader(oop loader);
780
781 // Debugging
782 friend class JavaClasses;
783 };
784
785
786 // Interface to java.lang.System objects
787
788 class java_lang_System : AllStatic {
789 private:
790 enum {
791 hc_static_in_offset = 0,
792 hc_static_out_offset = 1,
793 hc_static_err_offset = 2
794 };
795
796 static int offset_of_static_fields;
797 static int static_in_offset;
798 static int static_out_offset;
799 static int static_err_offset;
800
801 static void compute_offsets();
802
803 public:
804 static int in_offset_in_bytes();
805 static int out_offset_in_bytes();
806 static int err_offset_in_bytes();
807
808 // Debugging
809 friend class JavaClasses;
810 };
811
812
813 // Interface to java.lang.StackTraceElement objects
814
815 class java_lang_StackTraceElement: AllStatic {
816 private:
817 enum {
818 hc_declaringClass_offset = 0,
819 hc_methodName_offset = 1,
820 hc_fileName_offset = 2,
821 hc_lineNumber_offset = 3
822 };
823
824 static int declaringClass_offset;
825 static int methodName_offset;
826 static int fileName_offset;
827 static int lineNumber_offset;
828
829 public:
830 // Setters
831 static void set_declaringClass(oop element, oop value);
832 static void set_methodName(oop element, oop value);
833 static void set_fileName(oop element, oop value);
834 static void set_lineNumber(oop element, int value);
835
836 // Create an instance of StackTraceElement
837 static oop create(methodHandle m, int bci, TRAPS);
838
839 // Debugging
840 friend class JavaClasses;
841 };
842
843
844 // Interface to java.lang.AssertionStatusDirectives objects
845
846 class java_lang_AssertionStatusDirectives: AllStatic {
847 private:
848 enum {
849 hc_classes_offset,
850 hc_classEnabled_offset,
851 hc_packages_offset,
852 hc_packageEnabled_offset,
853 hc_deflt_offset
854 };
855
856 static int classes_offset;
857 static int classEnabled_offset;
858 static int packages_offset;
859 static int packageEnabled_offset;
860 static int deflt_offset;
861
862 public:
863 // Setters
864 static void set_classes(oop obj, oop val);
865 static void set_classEnabled(oop obj, oop val);
866 static void set_packages(oop obj, oop val);
867 static void set_packageEnabled(oop obj, oop val);
868 static void set_deflt(oop obj, bool val);
869 // Debugging
870 friend class JavaClasses;
871 };
872
873
874 class java_nio_Buffer: AllStatic {
875 private:
876 static int _limit_offset;
877
878 public:
879 static int limit_offset();
880 static void compute_offsets();
881 };
882
883 class sun_misc_AtomicLongCSImpl: AllStatic {
884 private:
885 static int _value_offset;
886
887 public:
888 static int value_offset();
889 static void compute_offsets();
890 };
891
892 class java_util_concurrent_locks_AbstractOwnableSynchronizer : AllStatic {
893 private:
894 static int _owner_offset;
895 public:
896 static void initialize(TRAPS);
897 static oop get_owner_threadObj(oop obj);
898 };
899
900 // Interface to hard-coded offset checking
901
902 class JavaClasses : AllStatic {
903 private:
904 static bool check_offset(const char *klass_name, int offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
905 static bool check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
906 static bool check_constant(const char *klass_name, int constant, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
907 public:
908 static void compute_hard_coded_offsets();
909 static void compute_offsets();
910 static void check_offsets() PRODUCT_RETURN;
911 };