Wed, 09 Apr 2008 15:10:22 -0700
Merge
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 */
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.
42 // Interface to java.lang.String objects
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,
50 hc_hash_offset = 3
51 };
53 static int value_offset;
54 static int offset_offset;
55 static int count_offset;
56 static int hash_offset;
58 static Handle basic_create(int length, bool tenured, TRAPS);
59 static Handle basic_create_from_unicode(jchar* unicode, int length, bool tenured, TRAPS);
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); }
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);
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; }
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);
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 char* as_platform_dependent_str(Handle java_string, TRAPS);
100 static jchar* as_unicode_string(oop java_string, int& length);
102 static bool equals(oop java_string, jchar* chars, int len);
104 // Conversion between '.' and '/' formats
105 static Handle externalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '/', '.', THREAD); }
106 static Handle internalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '.', '/', THREAD); }
108 // Conversion
109 static symbolHandle as_symbol(Handle java_string, TRAPS);
111 // Testers
112 static bool is_instance(oop obj) {
113 return obj != NULL && obj->klass() == SystemDictionary::string_klass();
114 }
116 // Debugging
117 static void print(Handle java_string, outputStream* st);
118 friend class JavaClasses;
119 };
122 // Interface to java.lang.Class objects
124 class java_lang_Class : AllStatic {
125 friend class VMStructs;
126 private:
127 // The fake offsets are added by the class loader when java.lang.Class is loaded
129 enum {
130 hc_klass_offset = 0,
131 hc_array_klass_offset = 1,
132 hc_resolved_constructor_offset = 2,
133 hc_number_of_fake_oop_fields = 3
134 };
136 static int klass_offset;
137 static int resolved_constructor_offset;
138 static int array_klass_offset;
139 static int number_of_fake_oop_fields;
141 static void compute_offsets();
142 static bool offsets_computed;
143 static int classRedefinedCount_offset;
145 public:
146 // Instance creation
147 static oop create_mirror(KlassHandle k, TRAPS);
148 static oop create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS);
149 // Conversion
150 static klassOop as_klassOop(oop java_class);
151 // Testing
152 static bool is_primitive(oop java_class);
153 static BasicType primitive_type(oop java_class);
154 static oop primitive_mirror(BasicType t);
155 // JVM_NewInstance support
156 static methodOop resolved_constructor(oop java_class);
157 static void set_resolved_constructor(oop java_class, methodOop constructor);
158 // JVM_NewArray support
159 static klassOop array_klass(oop java_class);
160 static void set_array_klass(oop java_class, klassOop klass);
161 // compiler support for class operations
162 static int klass_offset_in_bytes() { return klass_offset; }
163 static int resolved_constructor_offset_in_bytes() { return resolved_constructor_offset; }
164 static int array_klass_offset_in_bytes() { return array_klass_offset; }
165 // Support for classRedefinedCount field
166 static int classRedefinedCount(oop the_class_mirror);
167 static void set_classRedefinedCount(oop the_class_mirror, int value);
168 // Debugging
169 friend class JavaClasses;
170 friend class instanceKlass; // verification code accesses offsets
171 friend class ClassFileParser; // access to number_of_fake_fields
172 };
174 // Interface to java.lang.Thread objects
176 class java_lang_Thread : AllStatic {
177 private:
178 // Note that for this class the layout changed between JDK1.2 and JDK1.3,
179 // so we compute the offsets at startup rather than hard-wiring them.
180 static int _name_offset;
181 static int _group_offset;
182 static int _contextClassLoader_offset;
183 static int _inheritedAccessControlContext_offset;
184 static int _priority_offset;
185 static int _eetop_offset;
186 static int _daemon_offset;
187 static int _stillborn_offset;
188 static int _stackSize_offset;
189 static int _tid_offset;
190 static int _thread_status_offset;
191 static int _park_blocker_offset;
192 static int _park_event_offset ;
194 static void compute_offsets();
196 public:
197 // Instance creation
198 static oop create();
199 // Returns the JavaThread associated with the thread obj
200 static JavaThread* thread(oop java_thread);
201 // Set JavaThread for instance
202 static void set_thread(oop java_thread, JavaThread* thread);
203 // Name
204 static typeArrayOop name(oop java_thread);
205 static void set_name(oop java_thread, typeArrayOop name);
206 // Priority
207 static ThreadPriority priority(oop java_thread);
208 static void set_priority(oop java_thread, ThreadPriority priority);
209 // Thread group
210 static oop threadGroup(oop java_thread);
211 // Stillborn
212 static bool is_stillborn(oop java_thread);
213 static void set_stillborn(oop java_thread);
214 // Alive (NOTE: this is not really a field, but provides the correct
215 // definition without doing a Java call)
216 static bool is_alive(oop java_thread);
217 // Daemon
218 static bool is_daemon(oop java_thread);
219 static void set_daemon(oop java_thread);
220 // Context ClassLoader
221 static oop context_class_loader(oop java_thread);
222 // Control context
223 static oop inherited_access_control_context(oop java_thread);
224 // Stack size hint
225 static jlong stackSize(oop java_thread);
226 // Thread ID
227 static jlong thread_id(oop java_thread);
229 // Blocker object responsible for thread parking
230 static oop park_blocker(oop java_thread);
232 // Pointer to type-stable park handler, encoded as jlong.
233 // Should be set when apparently null
234 // For details, see unsafe.cpp Unsafe_Unpark
235 static jlong park_event(oop java_thread);
236 static bool set_park_event(oop java_thread, jlong ptr);
238 // Java Thread Status for JVMTI and M&M use.
239 // This thread status info is saved in threadStatus field of
240 // java.lang.Thread java class.
241 enum ThreadStatus {
242 NEW = 0,
243 RUNNABLE = JVMTI_THREAD_STATE_ALIVE + // runnable / running
244 JVMTI_THREAD_STATE_RUNNABLE,
245 SLEEPING = JVMTI_THREAD_STATE_ALIVE + // Thread.sleep()
246 JVMTI_THREAD_STATE_WAITING +
247 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
248 JVMTI_THREAD_STATE_SLEEPING,
249 IN_OBJECT_WAIT = JVMTI_THREAD_STATE_ALIVE + // Object.wait()
250 JVMTI_THREAD_STATE_WAITING +
251 JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
252 JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
253 IN_OBJECT_WAIT_TIMED = JVMTI_THREAD_STATE_ALIVE + // Object.wait(long)
254 JVMTI_THREAD_STATE_WAITING +
255 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
256 JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
257 PARKED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park()
258 JVMTI_THREAD_STATE_WAITING +
259 JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
260 JVMTI_THREAD_STATE_PARKED,
261 PARKED_TIMED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park(long)
262 JVMTI_THREAD_STATE_WAITING +
263 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
264 JVMTI_THREAD_STATE_PARKED,
265 BLOCKED_ON_MONITOR_ENTER = JVMTI_THREAD_STATE_ALIVE + // (re-)entering a synchronization block
266 JVMTI_THREAD_STATE_BLOCKED_ON_MONITOR_ENTER,
267 TERMINATED = JVMTI_THREAD_STATE_TERMINATED
268 };
269 // Write thread status info to threadStatus field of java.lang.Thread.
270 static void set_thread_status(oop java_thread_oop, ThreadStatus status);
271 // Read thread status info from threadStatus field of java.lang.Thread.
272 static ThreadStatus get_thread_status(oop java_thread_oop);
274 static const char* thread_status_name(oop java_thread_oop);
276 // Debugging
277 friend class JavaClasses;
278 };
280 // Interface to java.lang.ThreadGroup objects
282 class java_lang_ThreadGroup : AllStatic {
283 private:
284 static int _parent_offset;
285 static int _name_offset;
286 static int _threads_offset;
287 static int _groups_offset;
288 static int _maxPriority_offset;
289 static int _destroyed_offset;
290 static int _daemon_offset;
291 static int _vmAllowSuspension_offset;
292 static int _nthreads_offset;
293 static int _ngroups_offset;
295 static void compute_offsets();
297 public:
298 // parent ThreadGroup
299 static oop parent(oop java_thread_group);
300 // name
301 static typeArrayOop name(oop java_thread_group);
302 // ("name as oop" accessor is not necessary)
303 // Number of threads in group
304 static int nthreads(oop java_thread_group);
305 // threads
306 static objArrayOop threads(oop java_thread_group);
307 // Number of threads in group
308 static int ngroups(oop java_thread_group);
309 // groups
310 static objArrayOop groups(oop java_thread_group);
311 // maxPriority in group
312 static ThreadPriority maxPriority(oop java_thread_group);
313 // Destroyed
314 static bool is_destroyed(oop java_thread_group);
315 // Daemon
316 static bool is_daemon(oop java_thread_group);
317 // vmAllowSuspension
318 static bool is_vmAllowSuspension(oop java_thread_group);
319 // Debugging
320 friend class JavaClasses;
321 };
325 // Interface to java.lang.Throwable objects
327 class java_lang_Throwable: AllStatic {
328 friend class BacktraceBuilder;
330 private:
331 // Offsets
332 enum {
333 hc_backtrace_offset = 0,
334 hc_detailMessage_offset = 1,
335 hc_cause_offset = 2, // New since 1.4
336 hc_stackTrace_offset = 3 // New since 1.4
337 };
338 // Trace constants
339 enum {
340 trace_methods_offset = 0,
341 trace_bcis_offset = 1,
342 trace_next_offset = 2,
343 trace_size = 3,
344 trace_chunk_size = 32
345 };
347 static int backtrace_offset;
348 static int detailMessage_offset;
349 static int cause_offset;
350 static int stackTrace_offset;
352 // Printing
353 static char* print_stack_element_to_buffer(methodOop method, int bci);
354 static void print_to_stream(Handle stream, const char* str);
355 // StackTrace (programmatic access, new since 1.4)
356 static void clear_stacktrace(oop throwable);
357 // No stack trace available
358 static const char* no_stack_trace_message();
360 public:
361 // Backtrace
362 static oop backtrace(oop throwable);
363 static void set_backtrace(oop throwable, oop value);
364 // Needed by JVMTI to filter out this internal field.
365 static int get_backtrace_offset() { return backtrace_offset;}
366 static int get_detailMessage_offset() { return detailMessage_offset;}
367 // Message
368 static oop message(oop throwable);
369 static oop message(Handle throwable);
370 static void set_message(oop throwable, oop value);
371 // Print stack trace stored in exception by call-back to Java
372 // Note: this is no longer used in Merlin, but we still suppport
373 // it for compatibility.
374 static void print_stack_trace(oop throwable, oop print_stream);
375 static void print_stack_element(Handle stream, methodOop method, int bci);
376 static void print_stack_element(outputStream *st, methodOop method, int bci);
377 static void print_stack_usage(Handle stream);
379 // Allocate space for backtrace (created but stack trace not filled in)
380 static void allocate_backtrace(Handle throwable, TRAPS);
381 // Fill in current stack trace for throwable with preallocated backtrace (no GC)
382 static void fill_in_stack_trace_of_preallocated_backtrace(Handle throwable);
384 // Fill in current stack trace, can cause GC
385 static void fill_in_stack_trace(Handle throwable, TRAPS);
386 static void fill_in_stack_trace(Handle throwable);
387 // Programmatic access to stack trace
388 static oop get_stack_trace_element(oop throwable, int index, TRAPS);
389 static int get_stack_trace_depth(oop throwable, TRAPS);
390 // Printing
391 static void print(oop throwable, outputStream* st);
392 static void print(Handle throwable, outputStream* st);
393 static void print_stack_trace(oop throwable, outputStream* st);
394 // Debugging
395 friend class JavaClasses;
396 };
399 // Interface to java.lang.reflect.AccessibleObject objects
401 class java_lang_reflect_AccessibleObject: AllStatic {
402 private:
403 // Note that to reduce dependencies on the JDK we compute these
404 // offsets at run-time.
405 static int override_offset;
407 static void compute_offsets();
409 public:
410 // Accessors
411 static jboolean override(oop reflect);
412 static void set_override(oop reflect, jboolean value);
414 // Debugging
415 friend class JavaClasses;
416 };
419 // Interface to java.lang.reflect.Method objects
421 class java_lang_reflect_Method : public java_lang_reflect_AccessibleObject {
422 private:
423 // Note that to reduce dependencies on the JDK we compute these
424 // offsets at run-time.
425 static int clazz_offset;
426 static int name_offset;
427 static int returnType_offset;
428 static int parameterTypes_offset;
429 static int exceptionTypes_offset;
430 static int slot_offset;
431 static int modifiers_offset;
432 static int signature_offset;
433 static int annotations_offset;
434 static int parameter_annotations_offset;
435 static int annotation_default_offset;
437 static void compute_offsets();
439 public:
440 // Allocation
441 static Handle create(TRAPS);
443 // Accessors
444 static oop clazz(oop reflect);
445 static void set_clazz(oop reflect, oop value);
447 static oop name(oop method);
448 static void set_name(oop method, oop value);
450 static oop return_type(oop method);
451 static void set_return_type(oop method, oop value);
453 static oop parameter_types(oop method);
454 static void set_parameter_types(oop method, oop value);
456 static oop exception_types(oop method);
457 static void set_exception_types(oop method, oop value);
459 static int slot(oop reflect);
460 static void set_slot(oop reflect, int value);
462 static int modifiers(oop method);
463 static void set_modifiers(oop method, int value);
465 static bool has_signature_field();
466 static oop signature(oop method);
467 static void set_signature(oop method, oop value);
469 static bool has_annotations_field();
470 static oop annotations(oop method);
471 static void set_annotations(oop method, oop value);
473 static bool has_parameter_annotations_field();
474 static oop parameter_annotations(oop method);
475 static void set_parameter_annotations(oop method, oop value);
477 static bool has_annotation_default_field();
478 static oop annotation_default(oop method);
479 static void set_annotation_default(oop method, oop value);
481 // Debugging
482 friend class JavaClasses;
483 };
486 // Interface to java.lang.reflect.Constructor objects
488 class java_lang_reflect_Constructor : public java_lang_reflect_AccessibleObject {
489 private:
490 // Note that to reduce dependencies on the JDK we compute these
491 // offsets at run-time.
492 static int clazz_offset;
493 static int parameterTypes_offset;
494 static int exceptionTypes_offset;
495 static int slot_offset;
496 static int modifiers_offset;
497 static int signature_offset;
498 static int annotations_offset;
499 static int parameter_annotations_offset;
501 static void compute_offsets();
503 public:
504 // Allocation
505 static Handle create(TRAPS);
507 // Accessors
508 static oop clazz(oop reflect);
509 static void set_clazz(oop reflect, oop value);
511 static oop parameter_types(oop constructor);
512 static void set_parameter_types(oop constructor, oop value);
514 static oop exception_types(oop constructor);
515 static void set_exception_types(oop constructor, oop value);
517 static int slot(oop reflect);
518 static void set_slot(oop reflect, int value);
520 static int modifiers(oop constructor);
521 static void set_modifiers(oop constructor, int value);
523 static bool has_signature_field();
524 static oop signature(oop constructor);
525 static void set_signature(oop constructor, oop value);
527 static bool has_annotations_field();
528 static oop annotations(oop constructor);
529 static void set_annotations(oop constructor, oop value);
531 static bool has_parameter_annotations_field();
532 static oop parameter_annotations(oop method);
533 static void set_parameter_annotations(oop method, oop value);
535 // Debugging
536 friend class JavaClasses;
537 };
540 // Interface to java.lang.reflect.Field objects
542 class java_lang_reflect_Field : public java_lang_reflect_AccessibleObject {
543 private:
544 // Note that to reduce dependencies on the JDK we compute these
545 // offsets at run-time.
546 static int clazz_offset;
547 static int name_offset;
548 static int type_offset;
549 static int slot_offset;
550 static int modifiers_offset;
551 static int signature_offset;
552 static int annotations_offset;
554 static void compute_offsets();
556 public:
557 // Allocation
558 static Handle create(TRAPS);
560 // Accessors
561 static oop clazz(oop reflect);
562 static void set_clazz(oop reflect, oop value);
564 static oop name(oop field);
565 static void set_name(oop field, oop value);
567 static oop type(oop field);
568 static void set_type(oop field, oop value);
570 static int slot(oop reflect);
571 static void set_slot(oop reflect, int value);
573 static int modifiers(oop field);
574 static void set_modifiers(oop field, int value);
576 static bool has_signature_field();
577 static oop signature(oop constructor);
578 static void set_signature(oop constructor, oop value);
580 static bool has_annotations_field();
581 static oop annotations(oop constructor);
582 static void set_annotations(oop constructor, oop value);
584 static bool has_parameter_annotations_field();
585 static oop parameter_annotations(oop method);
586 static void set_parameter_annotations(oop method, oop value);
588 static bool has_annotation_default_field();
589 static oop annotation_default(oop method);
590 static void set_annotation_default(oop method, oop value);
592 // Debugging
593 friend class JavaClasses;
594 };
596 // Interface to sun.reflect.ConstantPool objects
597 class sun_reflect_ConstantPool {
598 private:
599 // Note that to reduce dependencies on the JDK we compute these
600 // offsets at run-time.
601 static int _cp_oop_offset;
603 static void compute_offsets();
605 public:
606 // Allocation
607 static Handle create(TRAPS);
609 // Accessors
610 static oop cp_oop(oop reflect);
611 static void set_cp_oop(oop reflect, oop value);
612 static int cp_oop_offset() {
613 return _cp_oop_offset;
614 }
616 // Debugging
617 friend class JavaClasses;
618 };
620 // Interface to sun.reflect.UnsafeStaticFieldAccessorImpl objects
621 class sun_reflect_UnsafeStaticFieldAccessorImpl {
622 private:
623 static int _base_offset;
624 static void compute_offsets();
626 public:
627 static int base_offset() {
628 return _base_offset;
629 }
631 // Debugging
632 friend class JavaClasses;
633 };
635 // Interface to java.lang primitive type boxing objects:
636 // - java.lang.Boolean
637 // - java.lang.Character
638 // - java.lang.Float
639 // - java.lang.Double
640 // - java.lang.Byte
641 // - java.lang.Short
642 // - java.lang.Integer
643 // - java.lang.Long
645 // This could be separated out into 8 individual classes.
647 class java_lang_boxing_object: AllStatic {
648 private:
649 enum {
650 hc_value_offset = 0
651 };
652 static int value_offset;
654 static oop initialize_and_allocate(klassOop klass, TRAPS);
655 public:
656 // Allocation. Returns a boxed value, or NULL for invalid type.
657 static oop create(BasicType type, jvalue* value, TRAPS);
658 // Accessors. Returns the basic type being boxed, or T_ILLEGAL for invalid oop.
659 static BasicType get_value(oop box, jvalue* value);
660 static BasicType set_value(oop box, jvalue* value);
662 static int value_offset_in_bytes() { return value_offset; }
664 // Debugging
665 friend class JavaClasses;
666 };
670 // Interface to java.lang.ref.Reference objects
672 class java_lang_ref_Reference: AllStatic {
673 public:
674 enum {
675 hc_referent_offset = 0,
676 hc_queue_offset = 1,
677 hc_next_offset = 2,
678 hc_discovered_offset = 3 // Is not last, see SoftRefs.
679 };
680 enum {
681 hc_static_lock_offset = 0,
682 hc_static_pending_offset = 1
683 };
685 static int referent_offset;
686 static int queue_offset;
687 static int next_offset;
688 static int discovered_offset;
689 static int static_lock_offset;
690 static int static_pending_offset;
691 static int number_of_fake_oop_fields;
693 // Accessors
694 static oop referent(oop ref) { return *referent_addr(ref); }
695 static void set_referent(oop ref, oop value);
696 static oop* referent_addr(oop ref);
698 static oop next(oop ref) { return *next_addr(ref); }
699 static void set_next(oop ref, oop value);
700 static oop* next_addr(oop ref);
702 static oop discovered(oop ref) { return *discovered_addr(ref); }
703 static void set_discovered(oop ref, oop value);
704 static oop* discovered_addr(oop ref);
706 // Accessors for statics
707 static oop pending_list_lock() { return *pending_list_lock_addr(); }
708 static oop pending_list() { return *pending_list_addr(); }
710 static oop* pending_list_lock_addr();
711 static oop* pending_list_addr();
712 };
715 // Interface to java.lang.ref.SoftReference objects
717 class java_lang_ref_SoftReference: public java_lang_ref_Reference {
718 public:
719 enum {
720 // The timestamp is a long field and may need to be adjusted for alignment.
721 hc_timestamp_offset = align_object_offset_(hc_discovered_offset + 1)
722 };
723 enum {
724 hc_static_clock_offset = 0
725 };
727 static int timestamp_offset;
728 static int static_clock_offset;
730 // Accessors
731 static jlong timestamp(oop ref);
733 // Accessors for statics
734 static jlong clock();
735 static void set_clock(jlong value);
736 };
739 // Interface to java.security.AccessControlContext objects
741 class java_security_AccessControlContext: AllStatic {
742 private:
743 // Note that for this class the layout changed between JDK1.2 and JDK1.3,
744 // so we compute the offsets at startup rather than hard-wiring them.
745 static int _context_offset;
746 static int _privilegedContext_offset;
747 static int _isPrivileged_offset;
749 static void compute_offsets();
750 public:
751 static oop create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS);
753 // Debugging/initialization
754 friend class JavaClasses;
755 };
758 // Interface to java.lang.ClassLoader objects
760 class java_lang_ClassLoader : AllStatic {
761 private:
762 enum {
763 hc_parent_offset = 0
764 };
766 static int parent_offset;
768 public:
769 static oop parent(oop loader);
771 static bool is_trusted_loader(oop loader);
773 // Fix for 4474172
774 static oop non_reflection_class_loader(oop loader);
776 // Debugging
777 friend class JavaClasses;
778 };
781 // Interface to java.lang.System objects
783 class java_lang_System : AllStatic {
784 private:
785 enum {
786 hc_static_in_offset = 0,
787 hc_static_out_offset = 1,
788 hc_static_err_offset = 2
789 };
791 static int offset_of_static_fields;
792 static int static_in_offset;
793 static int static_out_offset;
794 static int static_err_offset;
796 static void compute_offsets();
798 public:
799 static int in_offset_in_bytes();
800 static int out_offset_in_bytes();
801 static int err_offset_in_bytes();
803 // Debugging
804 friend class JavaClasses;
805 };
808 // Interface to java.lang.StackTraceElement objects
810 class java_lang_StackTraceElement: AllStatic {
811 private:
812 enum {
813 hc_declaringClass_offset = 0,
814 hc_methodName_offset = 1,
815 hc_fileName_offset = 2,
816 hc_lineNumber_offset = 3
817 };
819 static int declaringClass_offset;
820 static int methodName_offset;
821 static int fileName_offset;
822 static int lineNumber_offset;
824 public:
825 // Setters
826 static void set_declaringClass(oop element, oop value);
827 static void set_methodName(oop element, oop value);
828 static void set_fileName(oop element, oop value);
829 static void set_lineNumber(oop element, int value);
831 // Create an instance of StackTraceElement
832 static oop create(methodHandle m, int bci, TRAPS);
834 // Debugging
835 friend class JavaClasses;
836 };
839 // Interface to java.lang.AssertionStatusDirectives objects
841 class java_lang_AssertionStatusDirectives: AllStatic {
842 private:
843 enum {
844 hc_classes_offset,
845 hc_classEnabled_offset,
846 hc_packages_offset,
847 hc_packageEnabled_offset,
848 hc_deflt_offset
849 };
851 static int classes_offset;
852 static int classEnabled_offset;
853 static int packages_offset;
854 static int packageEnabled_offset;
855 static int deflt_offset;
857 public:
858 // Setters
859 static void set_classes(oop obj, oop val);
860 static void set_classEnabled(oop obj, oop val);
861 static void set_packages(oop obj, oop val);
862 static void set_packageEnabled(oop obj, oop val);
863 static void set_deflt(oop obj, bool val);
864 // Debugging
865 friend class JavaClasses;
866 };
869 class java_nio_Buffer: AllStatic {
870 private:
871 static int _limit_offset;
873 public:
874 static int limit_offset();
875 static void compute_offsets();
876 };
878 class sun_misc_AtomicLongCSImpl: AllStatic {
879 private:
880 static int _value_offset;
882 public:
883 static int value_offset();
884 static void compute_offsets();
885 };
887 class java_util_concurrent_locks_AbstractOwnableSynchronizer : AllStatic {
888 private:
889 static int _owner_offset;
890 public:
891 static void initialize(TRAPS);
892 static oop get_owner_threadObj(oop obj);
893 };
895 // Interface to hard-coded offset checking
897 class JavaClasses : AllStatic {
898 private:
899 static bool check_offset(const char *klass_name, int offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
900 static bool check_static_offset(const char *klass_name, int hardcoded_offset, 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 };