1 /*
2 * Copyright (c) 1997, 2010, 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 enum {
56 hc_value_offset = 0,
57 hc_offset_offset = 1
58 //hc_count_offset = 2 -- not a word-scaled offset
59 //hc_hash_offset = 3 -- not a word-scaled offset
60 };
61
62 static int value_offset;
63 static int offset_offset;
64 static int count_offset;
65 static int hash_offset;
66
67 static Handle basic_create(int length, bool tenured, TRAPS);
68 static Handle basic_create_from_unicode(jchar* unicode, int length, bool tenured, TRAPS);
69
70 static void set_value( oop string, typeArrayOop buffer) { string->obj_field_put(value_offset, (oop)buffer); }
71 static void set_offset(oop string, int offset) { string->int_field_put(offset_offset, offset); }
72 static void set_count( oop string, int count) { string->int_field_put(count_offset, count); }
73
74 public:
75 // Instance creation
76 static Handle create_from_unicode(jchar* unicode, int len, TRAPS);
77 static Handle create_tenured_from_unicode(jchar* unicode, int len, TRAPS);
78 static oop create_oop_from_unicode(jchar* unicode, int len, TRAPS);
79 static Handle create_from_str(const char* utf8_str, TRAPS);
80 static oop create_oop_from_str(const char* utf8_str, TRAPS);
81 static Handle create_from_symbol(symbolHandle symbol, TRAPS);
82 static Handle create_from_platform_dependent_str(const char* str, TRAPS);
83 static Handle char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS);
84
85 static int value_offset_in_bytes() { return value_offset; }
86 static int count_offset_in_bytes() { return count_offset; }
87 static int offset_offset_in_bytes() { return offset_offset; }
88 static int hash_offset_in_bytes() { return hash_offset; }
89
90 // Accessors
91 static typeArrayOop value(oop java_string) {
92 assert(is_instance(java_string), "must be java_string");
93 return (typeArrayOop) java_string->obj_field(value_offset);
94 }
95 static int offset(oop java_string) {
96 assert(is_instance(java_string), "must be java_string");
97 return java_string->int_field(offset_offset);
98 }
99 static int length(oop java_string) {
100 assert(is_instance(java_string), "must be java_string");
101 return java_string->int_field(count_offset);
102 }
103 static int utf8_length(oop java_string);
104
105 // String converters
106 static char* as_utf8_string(oop java_string);
107 static char* as_utf8_string(oop java_string, int start, int len);
108 static char* as_platform_dependent_str(Handle java_string, TRAPS);
109 static jchar* as_unicode_string(oop java_string, int& length);
110
111 static bool equals(oop java_string, jchar* chars, int len);
112
113 // Conversion between '.' and '/' formats
114 static Handle externalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '/', '.', THREAD); }
115 static Handle internalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '.', '/', THREAD); }
116
117 // Conversion
118 static symbolHandle as_symbol(Handle java_string, TRAPS);
119 static symbolOop as_symbol_or_null(oop java_string);
120
121 // Testers
122 static bool is_instance(oop obj) {
123 return obj != NULL && obj->klass() == SystemDictionary::String_klass();
124 }
125
126 // Debugging
127 static void print(Handle java_string, outputStream* st);
128 friend class JavaClasses;
129 };
130
131
132 // Interface to java.lang.Class objects
133
134 class java_lang_Class : AllStatic {
135 friend class VMStructs;
136 private:
137 // The fake offsets are added by the class loader when java.lang.Class is loaded
138
139 enum {
140 hc_klass_offset = 0,
141 hc_array_klass_offset = 1,
142 hc_resolved_constructor_offset = 2,
143 hc_number_of_fake_oop_fields = 3
144 };
145
146 static int klass_offset;
147 static int resolved_constructor_offset;
148 static int array_klass_offset;
149 static int number_of_fake_oop_fields;
150
151 static void compute_offsets();
152 static bool offsets_computed;
153 static int classRedefinedCount_offset;
154 static int parallelCapable_offset;
155
156 public:
157 // Instance creation
158 static oop create_mirror(KlassHandle k, TRAPS);
159 static oop create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS);
160 // Conversion
161 static klassOop as_klassOop(oop java_class);
162 static BasicType as_BasicType(oop java_class, klassOop* reference_klass = NULL);
163 static BasicType as_BasicType(oop java_class, KlassHandle* reference_klass) {
164 klassOop refk_oop = NULL;
165 BasicType result = as_BasicType(java_class, &refk_oop);
166 (*reference_klass) = KlassHandle(refk_oop);
167 return result;
168 }
169 static symbolOop as_signature(oop java_class, bool intern_if_not_found, TRAPS);
170 static void print_signature(oop java_class, outputStream *st);
171 // Testing
172 static bool is_instance(oop obj) {
173 return obj != NULL && obj->klass() == SystemDictionary::Class_klass();
174 }
175 static bool is_primitive(oop java_class);
176 static BasicType primitive_type(oop java_class);
177 static oop primitive_mirror(BasicType t);
178 // JVM_NewInstance support
179 static methodOop resolved_constructor(oop java_class);
180 static void set_resolved_constructor(oop java_class, methodOop constructor);
181 // JVM_NewArray support
182 static klassOop array_klass(oop java_class);
183 static void set_array_klass(oop java_class, klassOop klass);
184 // compiler support for class operations
185 static int klass_offset_in_bytes() { return klass_offset; }
186 static int resolved_constructor_offset_in_bytes() { return resolved_constructor_offset; }
187 static int array_klass_offset_in_bytes() { return array_klass_offset; }
188 // Support for classRedefinedCount field
189 static int classRedefinedCount(oop the_class_mirror);
190 static void set_classRedefinedCount(oop the_class_mirror, int value);
191 // Support for parallelCapable field
192 static bool parallelCapable(oop the_class_mirror);
193 // Debugging
194 friend class JavaClasses;
195 friend class instanceKlass; // verification code accesses offsets
196 friend class ClassFileParser; // access to number_of_fake_fields
197 };
198
199 // Interface to java.lang.Thread objects
200
201 class java_lang_Thread : AllStatic {
202 private:
203 // Note that for this class the layout changed between JDK1.2 and JDK1.3,
204 // so we compute the offsets at startup rather than hard-wiring them.
205 static int _name_offset;
206 static int _group_offset;
207 static int _contextClassLoader_offset;
208 static int _inheritedAccessControlContext_offset;
209 static int _priority_offset;
210 static int _eetop_offset;
211 static int _daemon_offset;
212 static int _stillborn_offset;
213 static int _stackSize_offset;
214 static int _tid_offset;
215 static int _thread_status_offset;
216 static int _park_blocker_offset;
217 static int _park_event_offset ;
218
219 static void compute_offsets();
220
221 public:
222 // Instance creation
223 static oop create();
224 // Returns the JavaThread associated with the thread obj
225 static JavaThread* thread(oop java_thread);
226 // Set JavaThread for instance
227 static void set_thread(oop java_thread, JavaThread* thread);
228 // Name
229 static typeArrayOop name(oop java_thread);
230 static void set_name(oop java_thread, typeArrayOop name);
231 // Priority
232 static ThreadPriority priority(oop java_thread);
233 static void set_priority(oop java_thread, ThreadPriority priority);
234 // Thread group
235 static oop threadGroup(oop java_thread);
236 // Stillborn
237 static bool is_stillborn(oop java_thread);
238 static void set_stillborn(oop java_thread);
239 // Alive (NOTE: this is not really a field, but provides the correct
240 // definition without doing a Java call)
241 static bool is_alive(oop java_thread);
242 // Daemon
243 static bool is_daemon(oop java_thread);
244 static void set_daemon(oop java_thread);
245 // Context ClassLoader
246 static oop context_class_loader(oop java_thread);
247 // Control context
248 static oop inherited_access_control_context(oop java_thread);
249 // Stack size hint
250 static jlong stackSize(oop java_thread);
251 // Thread ID
252 static jlong thread_id(oop java_thread);
253
254 // Blocker object responsible for thread parking
255 static oop park_blocker(oop java_thread);
256
257 // Pointer to type-stable park handler, encoded as jlong.
258 // Should be set when apparently null
259 // For details, see unsafe.cpp Unsafe_Unpark
260 static jlong park_event(oop java_thread);
261 static bool set_park_event(oop java_thread, jlong ptr);
262
263 // Java Thread Status for JVMTI and M&M use.
264 // This thread status info is saved in threadStatus field of
265 // java.lang.Thread java class.
266 enum ThreadStatus {
267 NEW = 0,
268 RUNNABLE = JVMTI_THREAD_STATE_ALIVE + // runnable / running
269 JVMTI_THREAD_STATE_RUNNABLE,
270 SLEEPING = JVMTI_THREAD_STATE_ALIVE + // Thread.sleep()
271 JVMTI_THREAD_STATE_WAITING +
272 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
273 JVMTI_THREAD_STATE_SLEEPING,
274 IN_OBJECT_WAIT = JVMTI_THREAD_STATE_ALIVE + // Object.wait()
275 JVMTI_THREAD_STATE_WAITING +
276 JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
277 JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
278 IN_OBJECT_WAIT_TIMED = JVMTI_THREAD_STATE_ALIVE + // Object.wait(long)
279 JVMTI_THREAD_STATE_WAITING +
280 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
281 JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
282 PARKED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park()
283 JVMTI_THREAD_STATE_WAITING +
284 JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
285 JVMTI_THREAD_STATE_PARKED,
286 PARKED_TIMED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park(long)
287 JVMTI_THREAD_STATE_WAITING +
288 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
289 JVMTI_THREAD_STATE_PARKED,
290 BLOCKED_ON_MONITOR_ENTER = JVMTI_THREAD_STATE_ALIVE + // (re-)entering a synchronization block
291 JVMTI_THREAD_STATE_BLOCKED_ON_MONITOR_ENTER,
292 TERMINATED = JVMTI_THREAD_STATE_TERMINATED
293 };
294 // Write thread status info to threadStatus field of java.lang.Thread.
295 static void set_thread_status(oop java_thread_oop, ThreadStatus status);
296 // Read thread status info from threadStatus field of java.lang.Thread.
297 static ThreadStatus get_thread_status(oop java_thread_oop);
298
299 static const char* thread_status_name(oop java_thread_oop);
300
301 // Debugging
302 friend class JavaClasses;
303 };
304
305 // Interface to java.lang.ThreadGroup objects
306
307 class java_lang_ThreadGroup : AllStatic {
308 private:
309 static int _parent_offset;
310 static int _name_offset;
311 static int _threads_offset;
312 static int _groups_offset;
313 static int _maxPriority_offset;
314 static int _destroyed_offset;
315 static int _daemon_offset;
316 static int _vmAllowSuspension_offset;
317 static int _nthreads_offset;
318 static int _ngroups_offset;
319
320 static void compute_offsets();
321
322 public:
323 // parent ThreadGroup
324 static oop parent(oop java_thread_group);
325 // name
326 static typeArrayOop name(oop java_thread_group);
327 // ("name as oop" accessor is not necessary)
328 // Number of threads in group
329 static int nthreads(oop java_thread_group);
330 // threads
331 static objArrayOop threads(oop java_thread_group);
332 // Number of threads in group
333 static int ngroups(oop java_thread_group);
334 // groups
335 static objArrayOop groups(oop java_thread_group);
336 // maxPriority in group
337 static ThreadPriority maxPriority(oop java_thread_group);
338 // Destroyed
339 static bool is_destroyed(oop java_thread_group);
340 // Daemon
341 static bool is_daemon(oop java_thread_group);
342 // vmAllowSuspension
343 static bool is_vmAllowSuspension(oop java_thread_group);
344 // Debugging
345 friend class JavaClasses;
346 };
347
348
349
350 // Interface to java.lang.Throwable objects
351
352 class java_lang_Throwable: AllStatic {
353 friend class BacktraceBuilder;
354
355 private:
356 // Offsets
357 enum {
358 hc_backtrace_offset = 0,
359 hc_detailMessage_offset = 1,
360 hc_cause_offset = 2, // New since 1.4
361 hc_stackTrace_offset = 3 // New since 1.4
362 };
363 // Trace constants
364 enum {
365 trace_methods_offset = 0,
366 trace_bcis_offset = 1,
367 trace_next_offset = 2,
368 trace_size = 3,
369 trace_chunk_size = 32
370 };
371
372 static int backtrace_offset;
373 static int detailMessage_offset;
374 static int cause_offset;
375 static int stackTrace_offset;
376
377 // Printing
378 static char* print_stack_element_to_buffer(methodOop method, int bci);
379 static void print_to_stream(Handle stream, const char* str);
380 // StackTrace (programmatic access, new since 1.4)
381 static void clear_stacktrace(oop throwable);
382 // No stack trace available
383 static const char* no_stack_trace_message();
384
385 public:
386 // Backtrace
387 static oop backtrace(oop throwable);
388 static void set_backtrace(oop throwable, oop value);
389 // Needed by JVMTI to filter out this internal field.
390 static int get_backtrace_offset() { return backtrace_offset;}
391 static int get_detailMessage_offset() { return detailMessage_offset;}
392 // Message
393 static oop message(oop throwable);
394 static oop message(Handle throwable);
395 static void set_message(oop throwable, oop value);
396 // Print stack trace stored in exception by call-back to Java
397 // Note: this is no longer used in Merlin, but we still suppport
398 // it for compatibility.
399 static void print_stack_trace(oop throwable, oop print_stream);
400 static void print_stack_element(Handle stream, methodOop method, int bci);
401 static void print_stack_element(outputStream *st, methodOop method, int bci);
402 static void print_stack_usage(Handle stream);
403
404 // Allocate space for backtrace (created but stack trace not filled in)
405 static void allocate_backtrace(Handle throwable, TRAPS);
406 // Fill in current stack trace for throwable with preallocated backtrace (no GC)
407 static void fill_in_stack_trace_of_preallocated_backtrace(Handle throwable);
408
409 // Fill in current stack trace, can cause GC
410 static void fill_in_stack_trace(Handle throwable, TRAPS);
411 static void fill_in_stack_trace(Handle throwable);
412 // Programmatic access to stack trace
413 static oop get_stack_trace_element(oop throwable, int index, TRAPS);
414 static int get_stack_trace_depth(oop throwable, TRAPS);
415 // Printing
416 static void print(oop throwable, outputStream* st);
417 static void print(Handle throwable, outputStream* st);
418 static void print_stack_trace(oop throwable, outputStream* st);
419 // Debugging
420 friend class JavaClasses;
421 };
422
423
424 // Interface to java.lang.reflect.AccessibleObject objects
425
426 class java_lang_reflect_AccessibleObject: AllStatic {
427 private:
428 // Note that to reduce dependencies on the JDK we compute these
429 // offsets at run-time.
430 static int override_offset;
431
432 static void compute_offsets();
433
434 public:
435 // Accessors
436 static jboolean override(oop reflect);
437 static void set_override(oop reflect, jboolean value);
438
439 // Debugging
440 friend class JavaClasses;
441 };
442
443
444 // Interface to java.lang.reflect.Method objects
445
446 class java_lang_reflect_Method : public java_lang_reflect_AccessibleObject {
447 private:
448 // Note that to reduce dependencies on the JDK we compute these
449 // offsets at run-time.
450 static int clazz_offset;
451 static int name_offset;
452 static int returnType_offset;
453 static int parameterTypes_offset;
454 static int exceptionTypes_offset;
455 static int slot_offset;
456 static int modifiers_offset;
457 static int signature_offset;
458 static int annotations_offset;
459 static int parameter_annotations_offset;
460 static int annotation_default_offset;
461
462 static void compute_offsets();
463
464 public:
465 // Allocation
466 static Handle create(TRAPS);
467
468 // Accessors
469 static oop clazz(oop reflect);
470 static void set_clazz(oop reflect, oop value);
471
472 static oop name(oop method);
473 static void set_name(oop method, oop value);
474
475 static oop return_type(oop method);
476 static void set_return_type(oop method, oop value);
477
478 static oop parameter_types(oop method);
479 static void set_parameter_types(oop method, oop value);
480
481 static oop exception_types(oop method);
482 static void set_exception_types(oop method, oop value);
483
484 static int slot(oop reflect);
485 static void set_slot(oop reflect, int value);
486
487 static int modifiers(oop method);
488 static void set_modifiers(oop method, int value);
489
490 static bool has_signature_field();
491 static oop signature(oop method);
492 static void set_signature(oop method, oop value);
493
494 static bool has_annotations_field();
495 static oop annotations(oop method);
496 static void set_annotations(oop method, oop value);
497
498 static bool has_parameter_annotations_field();
499 static oop parameter_annotations(oop method);
500 static void set_parameter_annotations(oop method, oop value);
501
502 static bool has_annotation_default_field();
503 static oop annotation_default(oop method);
504 static void set_annotation_default(oop method, oop value);
505
506 // Debugging
507 friend class JavaClasses;
508 };
509
510
511 // Interface to java.lang.reflect.Constructor objects
512
513 class java_lang_reflect_Constructor : public java_lang_reflect_AccessibleObject {
514 private:
515 // Note that to reduce dependencies on the JDK we compute these
516 // offsets at run-time.
517 static int clazz_offset;
518 static int parameterTypes_offset;
519 static int exceptionTypes_offset;
520 static int slot_offset;
521 static int modifiers_offset;
522 static int signature_offset;
523 static int annotations_offset;
524 static int parameter_annotations_offset;
525
526 static void compute_offsets();
527
528 public:
529 // Allocation
530 static Handle create(TRAPS);
531
532 // Accessors
533 static oop clazz(oop reflect);
534 static void set_clazz(oop reflect, oop value);
535
536 static oop parameter_types(oop constructor);
537 static void set_parameter_types(oop constructor, oop value);
538
539 static oop exception_types(oop constructor);
540 static void set_exception_types(oop constructor, oop value);
541
542 static int slot(oop reflect);
543 static void set_slot(oop reflect, int value);
544
545 static int modifiers(oop constructor);
546 static void set_modifiers(oop constructor, int value);
547
548 static bool has_signature_field();
549 static oop signature(oop constructor);
550 static void set_signature(oop constructor, oop value);
551
552 static bool has_annotations_field();
553 static oop annotations(oop constructor);
554 static void set_annotations(oop constructor, oop value);
555
556 static bool has_parameter_annotations_field();
557 static oop parameter_annotations(oop method);
558 static void set_parameter_annotations(oop method, oop value);
559
560 // Debugging
561 friend class JavaClasses;
562 };
563
564
565 // Interface to java.lang.reflect.Field objects
566
567 class java_lang_reflect_Field : public java_lang_reflect_AccessibleObject {
568 private:
569 // Note that to reduce dependencies on the JDK we compute these
570 // offsets at run-time.
571 static int clazz_offset;
572 static int name_offset;
573 static int type_offset;
574 static int slot_offset;
575 static int modifiers_offset;
576 static int signature_offset;
577 static int annotations_offset;
578
579 static void compute_offsets();
580
581 public:
582 // Allocation
583 static Handle create(TRAPS);
584
585 // Accessors
586 static oop clazz(oop reflect);
587 static void set_clazz(oop reflect, oop value);
588
589 static oop name(oop field);
590 static void set_name(oop field, oop value);
591
592 static oop type(oop field);
593 static void set_type(oop field, oop value);
594
595 static int slot(oop reflect);
596 static void set_slot(oop reflect, int value);
597
598 static int modifiers(oop field);
599 static void set_modifiers(oop field, int value);
600
601 static bool has_signature_field();
602 static oop signature(oop constructor);
603 static void set_signature(oop constructor, oop value);
604
605 static bool has_annotations_field();
606 static oop annotations(oop constructor);
607 static void set_annotations(oop constructor, oop value);
608
609 static bool has_parameter_annotations_field();
610 static oop parameter_annotations(oop method);
611 static void set_parameter_annotations(oop method, oop value);
612
613 static bool has_annotation_default_field();
614 static oop annotation_default(oop method);
615 static void set_annotation_default(oop method, oop value);
616
617 // Debugging
618 friend class JavaClasses;
619 };
620
621 // Interface to sun.reflect.ConstantPool objects
622 class sun_reflect_ConstantPool {
623 private:
624 // Note that to reduce dependencies on the JDK we compute these
625 // offsets at run-time.
626 static int _cp_oop_offset;
627
628 static void compute_offsets();
629
630 public:
631 // Allocation
632 static Handle create(TRAPS);
633
634 // Accessors
635 static oop cp_oop(oop reflect);
636 static void set_cp_oop(oop reflect, oop value);
637 static int cp_oop_offset() {
638 return _cp_oop_offset;
639 }
640
641 // Debugging
642 friend class JavaClasses;
643 };
644
645 // Interface to sun.reflect.UnsafeStaticFieldAccessorImpl objects
646 class sun_reflect_UnsafeStaticFieldAccessorImpl {
647 private:
648 static int _base_offset;
649 static void compute_offsets();
650
651 public:
652 static int base_offset() {
653 return _base_offset;
654 }
655
656 // Debugging
657 friend class JavaClasses;
658 };
659
660 // Interface to java.lang primitive type boxing objects:
661 // - java.lang.Boolean
662 // - java.lang.Character
663 // - java.lang.Float
664 // - java.lang.Double
665 // - java.lang.Byte
666 // - java.lang.Short
667 // - java.lang.Integer
668 // - java.lang.Long
669
670 // This could be separated out into 8 individual classes.
671
672 class java_lang_boxing_object: AllStatic {
673 private:
674 enum {
675 hc_value_offset = 0
676 };
677 static int value_offset;
678 static int long_value_offset;
679
680 static oop initialize_and_allocate(BasicType type, TRAPS);
681 public:
682 // Allocation. Returns a boxed value, or NULL for invalid type.
683 static oop create(BasicType type, jvalue* value, TRAPS);
684 // Accessors. Returns the basic type being boxed, or T_ILLEGAL for invalid oop.
685 static BasicType get_value(oop box, jvalue* value);
686 static BasicType set_value(oop box, jvalue* value);
687 static BasicType basic_type(oop box);
688 static bool is_instance(oop box) { return basic_type(box) != T_ILLEGAL; }
689 static bool is_instance(oop box, BasicType type) { return basic_type(box) == type; }
690 static void print(oop box, outputStream* st) { jvalue value; print(get_value(box, &value), &value, st); }
691 static void print(BasicType type, jvalue* value, outputStream* st);
692
693 static int value_offset_in_bytes(BasicType type) {
694 return ( type == T_LONG || type == T_DOUBLE ) ? long_value_offset :
695 value_offset;
696 }
697
698 // Debugging
699 friend class JavaClasses;
700 };
701
702
703
704 // Interface to java.lang.ref.Reference objects
705
706 class java_lang_ref_Reference: AllStatic {
707 public:
708 enum {
709 hc_referent_offset = 0,
710 hc_queue_offset = 1,
711 hc_next_offset = 2,
712 hc_discovered_offset = 3 // Is not last, see SoftRefs.
713 };
714 enum {
715 hc_static_lock_offset = 0,
716 hc_static_pending_offset = 1
717 };
718
719 static int referent_offset;
720 static int queue_offset;
721 static int next_offset;
722 static int discovered_offset;
723 static int static_lock_offset;
724 static int static_pending_offset;
725 static int number_of_fake_oop_fields;
726
727 // Accessors
728 static oop referent(oop ref) {
729 return ref->obj_field(referent_offset);
730 }
731 static void set_referent(oop ref, oop value) {
732 ref->obj_field_put(referent_offset, value);
733 }
734 static void set_referent_raw(oop ref, oop value) {
735 ref->obj_field_raw_put(referent_offset, value);
736 }
737 static HeapWord* referent_addr(oop ref) {
738 return ref->obj_field_addr<HeapWord>(referent_offset);
739 }
740 static oop next(oop ref) {
741 return ref->obj_field(next_offset);
742 }
743 static void set_next(oop ref, oop value) {
744 ref->obj_field_put(next_offset, value);
745 }
746 static void set_next_raw(oop ref, oop value) {
747 ref->obj_field_raw_put(next_offset, value);
748 }
749 static HeapWord* next_addr(oop ref) {
750 return ref->obj_field_addr<HeapWord>(next_offset);
751 }
752 static oop discovered(oop ref) {
753 return ref->obj_field(discovered_offset);
754 }
755 static void set_discovered(oop ref, oop value) {
756 ref->obj_field_put(discovered_offset, value);
757 }
758 static void set_discovered_raw(oop ref, oop value) {
759 ref->obj_field_raw_put(discovered_offset, value);
760 }
761 static HeapWord* discovered_addr(oop ref) {
762 return ref->obj_field_addr<HeapWord>(discovered_offset);
763 }
764 // Accessors for statics
765 static oop pending_list_lock();
766 static oop pending_list();
767
768 static HeapWord* pending_list_addr();
769 };
770
771
772 // Interface to java.lang.ref.SoftReference objects
773
774 class java_lang_ref_SoftReference: public java_lang_ref_Reference {
775 public:
776 enum {
777 // The timestamp is a long field and may need to be adjusted for alignment.
778 hc_timestamp_offset = hc_discovered_offset + 1
779 };
780 enum {
781 hc_static_clock_offset = 0
782 };
783
784 static int timestamp_offset;
785 static int static_clock_offset;
786
787 // Accessors
788 static jlong timestamp(oop ref);
789
790 // Accessors for statics
791 static jlong clock();
792 static void set_clock(jlong value);
793 };
794
795
796 // Interface to java.dyn.MethodHandle objects
797
798 class MethodHandleEntry;
799
800 class java_dyn_MethodHandle: AllStatic {
801 friend class JavaClasses;
802
803 private:
804 static int _vmentry_offset; // assembly code trampoline for MH
805 static int _vmtarget_offset; // class-specific target reference
806 static int _type_offset; // the MethodType of this MH
807 static int _vmslots_offset; // OPTIONAL hoisted type.form.vmslots
808
809 static void compute_offsets();
810
811 public:
812 // Accessors
813 static oop type(oop mh);
814 static void set_type(oop mh, oop mtype);
815
816 static oop vmtarget(oop mh);
817 static void set_vmtarget(oop mh, oop target);
818
819 static MethodHandleEntry* vmentry(oop mh);
820 static void set_vmentry(oop mh, MethodHandleEntry* data);
821
822 static int vmslots(oop mh);
823 static void init_vmslots(oop mh);
824 static int compute_vmslots(oop mh);
825
826 // Testers
827 static bool is_subclass(klassOop klass) {
828 return Klass::cast(klass)->is_subclass_of(SystemDictionary::MethodHandle_klass());
829 }
830 static bool is_instance(oop obj) {
831 return obj != NULL && is_subclass(obj->klass());
832 }
833
834 // Accessors for code generation:
835 static int type_offset_in_bytes() { return _type_offset; }
836 static int vmtarget_offset_in_bytes() { return _vmtarget_offset; }
837 static int vmentry_offset_in_bytes() { return _vmentry_offset; }
838 static int vmslots_offset_in_bytes() { return _vmslots_offset; }
839 };
840
841 class sun_dyn_DirectMethodHandle: public java_dyn_MethodHandle {
842 friend class JavaClasses;
843
844 private:
845 // _vmtarget_offset; // method or class or interface
846 static int _vmindex_offset; // negative or vtable idx or itable idx
847 static void compute_offsets();
848
849 public:
850 // Accessors
851 static int vmindex(oop mh);
852 static void set_vmindex(oop mh, int index);
853
854 // Testers
855 static bool is_subclass(klassOop klass) {
856 return Klass::cast(klass)->is_subclass_of(SystemDictionary::DirectMethodHandle_klass());
857 }
858 static bool is_instance(oop obj) {
859 return obj != NULL && is_subclass(obj->klass());
860 }
861
862 // Accessors for code generation:
863 static int vmindex_offset_in_bytes() { return _vmindex_offset; }
864 };
865
866 class sun_dyn_BoundMethodHandle: public java_dyn_MethodHandle {
867 friend class JavaClasses;
868
869 private:
870 static int _argument_offset; // argument value bound into this MH
871 static int _vmargslot_offset; // relevant argument slot (<= vmslots)
872 static void compute_offsets();
873
874 public:
875 static oop argument(oop mh);
876 static void set_argument(oop mh, oop ref);
877
878 static jint vmargslot(oop mh);
879 static void set_vmargslot(oop mh, jint slot);
880
881 // Testers
882 static bool is_subclass(klassOop klass) {
883 return Klass::cast(klass)->is_subclass_of(SystemDictionary::BoundMethodHandle_klass());
884 }
885 static bool is_instance(oop obj) {
886 return obj != NULL && is_subclass(obj->klass());
887 }
888
889 static int argument_offset_in_bytes() { return _argument_offset; }
890 static int vmargslot_offset_in_bytes() { return _vmargslot_offset; }
891 };
892
893 class sun_dyn_AdapterMethodHandle: public sun_dyn_BoundMethodHandle {
894 friend class JavaClasses;
895
896 private:
897 static int _conversion_offset; // type of conversion to apply
898 static void compute_offsets();
899
900 public:
901 static int conversion(oop mh);
902 static void set_conversion(oop mh, int conv);
903
904 // Testers
905 static bool is_subclass(klassOop klass) {
906 return Klass::cast(klass)->is_subclass_of(SystemDictionary::AdapterMethodHandle_klass());
907 }
908 static bool is_instance(oop obj) {
909 return obj != NULL && is_subclass(obj->klass());
910 }
911
912 // Relevant integer codes (keep these in synch. with MethodHandleNatives.Constants):
913 enum {
914 OP_RETYPE_ONLY = 0x0, // no argument changes; straight retype
915 OP_RETYPE_RAW = 0x1, // straight retype, trusted (void->int, Object->T)
916 OP_CHECK_CAST = 0x2, // ref-to-ref conversion; requires a Class argument
917 OP_PRIM_TO_PRIM = 0x3, // converts from one primitive to another
918 OP_REF_TO_PRIM = 0x4, // unboxes a wrapper to produce a primitive
919 OP_PRIM_TO_REF = 0x5, // boxes a primitive into a wrapper (NYI)
920 OP_SWAP_ARGS = 0x6, // swap arguments (vminfo is 2nd arg)
921 OP_ROT_ARGS = 0x7, // rotate arguments (vminfo is displaced arg)
922 OP_DUP_ARGS = 0x8, // duplicates one or more arguments (at TOS)
923 OP_DROP_ARGS = 0x9, // remove one or more argument slots
924 OP_COLLECT_ARGS = 0xA, // combine one or more arguments into a varargs (NYI)
925 OP_SPREAD_ARGS = 0xB, // expand in place a varargs array (of known size)
926 OP_FLYBY = 0xC, // operate first on reified argument list (NYI)
927 OP_RICOCHET = 0xD, // run an adapter chain on the return value (NYI)
928 CONV_OP_LIMIT = 0xE, // limit of CONV_OP enumeration
929
930 CONV_OP_MASK = 0xF00, // this nybble contains the conversion op field
931 CONV_VMINFO_MASK = 0x0FF, // LSB is reserved for JVM use
932 CONV_VMINFO_SHIFT = 0, // position of bits in CONV_VMINFO_MASK
933 CONV_OP_SHIFT = 8, // position of bits in CONV_OP_MASK
934 CONV_DEST_TYPE_SHIFT = 12, // byte 2 has the adapter BasicType (if needed)
935 CONV_SRC_TYPE_SHIFT = 16, // byte 2 has the source BasicType (if needed)
936 CONV_STACK_MOVE_SHIFT = 20, // high 12 bits give signed SP change
937 CONV_STACK_MOVE_MASK = (1 << (32 - CONV_STACK_MOVE_SHIFT)) - 1
938 };
939
940 static int conversion_offset_in_bytes() { return _conversion_offset; }
941 };
942
943
944 // Interface to sun.dyn.MemberName objects
945 // (These are a private interface for Java code to query the class hierarchy.)
946
947 class sun_dyn_MemberName: AllStatic {
948 friend class JavaClasses;
949
950 private:
951 // From java.dyn.MemberName:
952 // private Class<?> clazz; // class in which the method is defined
953 // private String name; // may be null if not yet materialized
954 // private Object type; // may be null if not yet materialized
955 // private int flags; // modifier bits; see reflect.Modifier
956 // private Object vmtarget; // VM-specific target value
957 // private int vmindex; // method index within class or interface
958 static int _clazz_offset;
959 static int _name_offset;
960 static int _type_offset;
961 static int _flags_offset;
962 static int _vmtarget_offset;
963 static int _vmindex_offset;
964
965 static void compute_offsets();
966
967 public:
968 // Accessors
969 static oop clazz(oop mname);
970 static void set_clazz(oop mname, oop clazz);
971
972 static oop type(oop mname);
973 static void set_type(oop mname, oop type);
974
975 static oop name(oop mname);
976 static void set_name(oop mname, oop name);
977
978 static int flags(oop mname);
979 static void set_flags(oop mname, int flags);
980
981 static int modifiers(oop mname) { return (u2) flags(mname); }
982 static void set_modifiers(oop mname, int mods)
983 { set_flags(mname, (flags(mname) &~ (u2)-1) | (u2)mods); }
984
985 static oop vmtarget(oop mname);
986 static void set_vmtarget(oop mname, oop target);
987
988 static int vmindex(oop mname);
989 static void set_vmindex(oop mname, int index);
990
991 // Testers
992 static bool is_subclass(klassOop klass) {
993 return Klass::cast(klass)->is_subclass_of(SystemDictionary::MemberName_klass());
994 }
995 static bool is_instance(oop obj) {
996 return obj != NULL && is_subclass(obj->klass());
997 }
998
999 // Relevant integer codes (keep these in synch. with MethodHandleNatives.Constants):
1000 enum {
1001 MN_IS_METHOD = 0x00010000, // method (not constructor)
1002 MN_IS_CONSTRUCTOR = 0x00020000, // constructor
1003 MN_IS_FIELD = 0x00040000, // field
1004 MN_IS_TYPE = 0x00080000, // nested type
1005 MN_SEARCH_SUPERCLASSES = 0x00100000, // for MHN.getMembers
1006 MN_SEARCH_INTERFACES = 0x00200000, // for MHN.getMembers
1007 VM_INDEX_UNINITIALIZED = -99
1008 };
1009
1010 // Accessors for code generation:
1011 static int clazz_offset_in_bytes() { return _clazz_offset; }
1012 static int type_offset_in_bytes() { return _type_offset; }
1013 static int name_offset_in_bytes() { return _name_offset; }
1014 static int flags_offset_in_bytes() { return _flags_offset; }
1015 static int vmtarget_offset_in_bytes() { return _vmtarget_offset; }
1016 static int vmindex_offset_in_bytes() { return _vmindex_offset; }
1017 };
1018
1019
1020 // Interface to java.dyn.MethodType objects
1021
1022 class java_dyn_MethodType: AllStatic {
1023 friend class JavaClasses;
1024
1025 private:
1026 static int _rtype_offset;
1027 static int _ptypes_offset;
1028 static int _form_offset;
1029
1030 static void compute_offsets();
1031
1032 public:
1033 // Accessors
1034 static oop rtype(oop mt);
1035 static objArrayOop ptypes(oop mt);
1036 static oop form(oop mt);
1037
1038 static oop ptype(oop mt, int index);
1039 static int ptype_count(oop mt);
1040
1041 static symbolOop as_signature(oop mt, bool intern_if_not_found, TRAPS);
1042 static void print_signature(oop mt, outputStream* st);
1043
1044 static bool is_instance(oop obj) {
1045 return obj != NULL && obj->klass() == SystemDictionary::MethodType_klass();
1046 }
1047
1048 // Accessors for code generation:
1049 static int rtype_offset_in_bytes() { return _rtype_offset; }
1050 static int ptypes_offset_in_bytes() { return _ptypes_offset; }
1051 static int form_offset_in_bytes() { return _form_offset; }
1052 };
1053
1054 class java_dyn_MethodTypeForm: AllStatic {
1055 friend class JavaClasses;
1056
1057 private:
1058 static int _vmslots_offset; // number of argument slots needed
1059 static int _erasedType_offset; // erasedType = canonical MethodType
1060 static int _genericInvoker_offset; // genericInvoker = adapter for invokeGeneric
1061
1062 static void compute_offsets();
1063
1064 public:
1065 // Accessors
1066 static int vmslots(oop mtform);
1067 static oop erasedType(oop mtform);
1068 static oop genericInvoker(oop mtform);
1069
1070 // Accessors for code generation:
1071 static int vmslots_offset_in_bytes() { return _vmslots_offset; }
1072 static int erasedType_offset_in_bytes() { return _erasedType_offset; }
1073 static int genericInvoker_offset_in_bytes() { return _genericInvoker_offset; }
1074 };
1075
1076
1077 // Interface to java.dyn.CallSite objects
1078
1079 class java_dyn_CallSite: AllStatic {
1080 friend class JavaClasses;
1081
1082 private:
1083 static int _target_offset;
1084 static int _caller_method_offset;
1085 static int _caller_bci_offset;
1086
1087 static void compute_offsets();
1088
1089 public:
1090 // Accessors
1091 static oop target(oop site);
1092 static void set_target(oop site, oop target);
1093
1094 static oop caller_method(oop site);
1095 static void set_caller_method(oop site, oop ref);
1096
1097 static jint caller_bci(oop site);
1098 static void set_caller_bci(oop site, jint bci);
1099
1100 // Testers
1101 static bool is_subclass(klassOop klass) {
1102 return Klass::cast(klass)->is_subclass_of(SystemDictionary::CallSite_klass());
1103 }
1104 static bool is_instance(oop obj) {
1105 return obj != NULL && is_subclass(obj->klass());
1106 }
1107
1108 // Accessors for code generation:
1109 static int target_offset_in_bytes() { return _target_offset; }
1110 static int caller_method_offset_in_bytes() { return _caller_method_offset; }
1111 static int caller_bci_offset_in_bytes() { return _caller_bci_offset; }
1112 };
1113
1114
1115 // Interface to java.security.AccessControlContext objects
1116
1117 class java_security_AccessControlContext: AllStatic {
1118 private:
1119 // Note that for this class the layout changed between JDK1.2 and JDK1.3,
1120 // so we compute the offsets at startup rather than hard-wiring them.
1121 static int _context_offset;
1122 static int _privilegedContext_offset;
1123 static int _isPrivileged_offset;
1124
1125 static void compute_offsets();
1126 public:
1127 static oop create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS);
1128
1129 // Debugging/initialization
1130 friend class JavaClasses;
1131 };
1132
1133
1134 // Interface to java.lang.ClassLoader objects
1135
1136 class java_lang_ClassLoader : AllStatic {
1137 private:
1138 enum {
1139 hc_parent_offset = 0
1140 };
1141
1142 static int parent_offset;
1143
1144 public:
1145 static oop parent(oop loader);
1146
1147 static bool is_trusted_loader(oop loader);
1148
1149 // Fix for 4474172
1150 static oop non_reflection_class_loader(oop loader);
1151
1152 // Debugging
1153 friend class JavaClasses;
1154 };
1155
1156
1157 // Interface to java.lang.System objects
1158
1159 class java_lang_System : AllStatic {
1160 private:
1161 enum {
1162 hc_static_in_offset = 0,
1163 hc_static_out_offset = 1,
1164 hc_static_err_offset = 2
1165 };
1166
1167 static int offset_of_static_fields;
1168 static int static_in_offset;
1169 static int static_out_offset;
1170 static int static_err_offset;
1171
1172 static void compute_offsets();
1173
1174 public:
1175 static int in_offset_in_bytes();
1176 static int out_offset_in_bytes();
1177 static int err_offset_in_bytes();
1178
1179 // Debugging
1180 friend class JavaClasses;
1181 };
1182
1183
1184 // Interface to java.lang.StackTraceElement objects
1185
1186 class java_lang_StackTraceElement: AllStatic {
1187 private:
1188 enum {
1189 hc_declaringClass_offset = 0,
1190 hc_methodName_offset = 1,
1191 hc_fileName_offset = 2,
1192 hc_lineNumber_offset = 3
1193 };
1194
1195 static int declaringClass_offset;
1196 static int methodName_offset;
1197 static int fileName_offset;
1198 static int lineNumber_offset;
1199
1200 public:
1201 // Setters
1202 static void set_declaringClass(oop element, oop value);
1203 static void set_methodName(oop element, oop value);
1204 static void set_fileName(oop element, oop value);
1205 static void set_lineNumber(oop element, int value);
1206
1207 // Create an instance of StackTraceElement
1208 static oop create(methodHandle m, int bci, TRAPS);
1209
1210 // Debugging
1211 friend class JavaClasses;
1212 };
1213
1214
1215 // Interface to java.lang.AssertionStatusDirectives objects
1216
1217 class java_lang_AssertionStatusDirectives: AllStatic {
1218 private:
1219 enum {
1220 hc_classes_offset,
1221 hc_classEnabled_offset,
1222 hc_packages_offset,
1223 hc_packageEnabled_offset,
1224 hc_deflt_offset
1225 };
1226
1227 static int classes_offset;
1228 static int classEnabled_offset;
1229 static int packages_offset;
1230 static int packageEnabled_offset;
1231 static int deflt_offset;
1232
1233 public:
1234 // Setters
1235 static void set_classes(oop obj, oop val);
1236 static void set_classEnabled(oop obj, oop val);
1237 static void set_packages(oop obj, oop val);
1238 static void set_packageEnabled(oop obj, oop val);
1239 static void set_deflt(oop obj, bool val);
1240 // Debugging
1241 friend class JavaClasses;
1242 };
1243
1244
1245 class java_nio_Buffer: AllStatic {
1246 private:
1247 static int _limit_offset;
1248
1249 public:
1250 static int limit_offset();
1251 static void compute_offsets();
1252 };
1253
1254 class sun_misc_AtomicLongCSImpl: AllStatic {
1255 private:
1256 static int _value_offset;
1257
1258 public:
1259 static int value_offset();
1260 static void compute_offsets();
1261 };
1262
1263 class java_util_concurrent_locks_AbstractOwnableSynchronizer : AllStatic {
1264 private:
1265 static int _owner_offset;
1266 public:
1267 static void initialize(TRAPS);
1268 static oop get_owner_threadObj(oop obj);
1269 };
1270
1271 // Interface to hard-coded offset checking
1272
1273 class JavaClasses : AllStatic {
1274 private:
1275 static bool check_offset(const char *klass_name, int offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1276 static bool check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1277 static bool check_constant(const char *klass_name, int constant, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1278 public:
1279 static void compute_hard_coded_offsets();
1280 static void compute_offsets();
1281 static void check_offsets() PRODUCT_RETURN;
1282 };
1283
1284 #endif // SHARE_VM_CLASSFILE_JAVACLASSES_HPP