1 /*
2 * Copyright (c) 1997, 2011, 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(Symbol* 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, char* buf, int buflen);
108 static char* as_utf8_string(oop java_string, int start, int len);
109 static char* as_platform_dependent_str(Handle java_string, TRAPS);
110 static jchar* as_unicode_string(oop java_string, int& length);
111
112 // Compute the hash value for a java.lang.String object which would
113 // contain the characters passed in. This hash value is used for at
114 // least two purposes.
115 //
116 // (a) As the hash value used by the StringTable for bucket selection
117 // and comparison (stored in the HashtableEntry structures). This
118 // is used in the String.intern() method.
119 //
120 // (b) As the hash value used by the String object itself, in
121 // String.hashCode(). This value is normally calculate in Java code
122 // in the String.hashCode method(), but is precomputed for String
123 // objects in the shared archive file.
124 //
125 // For this reason, THIS ALGORITHM MUST MATCH String.hashCode().
126 static unsigned int hash_string(jchar* s, int len) {
127 unsigned int h = 0;
128 while (len-- > 0) {
129 h = 31*h + (unsigned int) *s;
130 s++;
131 }
132 return h;
133 }
134 static unsigned int hash_string(oop java_string);
135
136 static bool equals(oop java_string, jchar* chars, int len);
137
138 // Conversion between '.' and '/' formats
139 static Handle externalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '/', '.', THREAD); }
140 static Handle internalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '.', '/', THREAD); }
141
142 // Conversion
143 static Symbol* as_symbol(Handle java_string, TRAPS);
144 static Symbol* as_symbol_or_null(oop java_string);
145
146 // Testers
147 static bool is_instance(oop obj) {
148 return obj != NULL && obj->klass() == SystemDictionary::String_klass();
149 }
150
151 // Debugging
152 static void print(Handle java_string, outputStream* st);
153 friend class JavaClasses;
154 };
155
156
157 // Interface to java.lang.Class objects
158
159 class java_lang_Class : AllStatic {
160 friend class VMStructs;
161 private:
162 // The fake offsets are added by the class loader when java.lang.Class is loaded
163
164 enum {
165 hc_number_of_fake_oop_fields = 3,
166 hc_number_of_fake_int_fields = 2
167 };
168
169 static int klass_offset;
170 static int resolved_constructor_offset;
171 static int array_klass_offset;
172 static int number_of_fake_oop_fields;
173
174 static int oop_size_offset;
175 static int static_oop_field_count_offset;
176
177 static void compute_offsets();
178 static bool offsets_computed;
179 static int classRedefinedCount_offset;
180 static int parallelCapable_offset;
181
182 public:
183 // Instance creation
184 static oop create_mirror(KlassHandle k, TRAPS);
185 static void fixup_mirror(KlassHandle k, TRAPS);
186 static oop create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS);
187 // Conversion
188 static klassOop as_klassOop(oop java_class);
189 static BasicType as_BasicType(oop java_class, klassOop* reference_klass = NULL);
190 static BasicType as_BasicType(oop java_class, KlassHandle* reference_klass) {
191 klassOop refk_oop = NULL;
192 BasicType result = as_BasicType(java_class, &refk_oop);
193 (*reference_klass) = KlassHandle(refk_oop);
194 return result;
195 }
196 static Symbol* as_signature(oop java_class, bool intern_if_not_found, TRAPS);
197 static void print_signature(oop java_class, outputStream *st);
198 // Testing
199 static bool is_instance(oop obj) {
200 return obj != NULL && obj->klass() == SystemDictionary::Class_klass();
201 }
202 static bool is_primitive(oop java_class);
203 static BasicType primitive_type(oop java_class);
204 static oop primitive_mirror(BasicType t);
205 // JVM_NewInstance support
206 static methodOop resolved_constructor(oop java_class);
207 static void set_resolved_constructor(oop java_class, methodOop constructor);
208 // JVM_NewArray support
209 static klassOop array_klass(oop java_class);
210 static void set_array_klass(oop java_class, klassOop klass);
211 // compiler support for class operations
212 static int klass_offset_in_bytes() { return klass_offset; }
213 static int resolved_constructor_offset_in_bytes() { return resolved_constructor_offset; }
214 static int array_klass_offset_in_bytes() { return array_klass_offset; }
215 // Support for classRedefinedCount field
216 static int classRedefinedCount(oop the_class_mirror);
217 static void set_classRedefinedCount(oop the_class_mirror, int value);
218 // Support for parallelCapable field
219 static bool parallelCapable(oop the_class_mirror);
220
221 static int oop_size(oop java_class);
222 static void set_oop_size(oop java_class, int size);
223 static int static_oop_field_count(oop java_class);
224 static void set_static_oop_field_count(oop java_class, int size);
225
226 // Debugging
227 friend class JavaClasses;
228 friend class instanceKlass; // verification code accesses offsets
229 friend class ClassFileParser; // access to number_of_fake_fields
230 };
231
232 // Interface to java.lang.Thread objects
233
234 class java_lang_Thread : AllStatic {
235 private:
236 // Note that for this class the layout changed between JDK1.2 and JDK1.3,
237 // so we compute the offsets at startup rather than hard-wiring them.
238 static int _name_offset;
239 static int _group_offset;
240 static int _contextClassLoader_offset;
241 static int _inheritedAccessControlContext_offset;
242 static int _priority_offset;
243 static int _eetop_offset;
244 static int _daemon_offset;
245 static int _stillborn_offset;
246 static int _stackSize_offset;
247 static int _tid_offset;
248 static int _thread_status_offset;
249 static int _park_blocker_offset;
250 static int _park_event_offset ;
251
252 static void compute_offsets();
253
254 public:
255 // Instance creation
256 static oop create();
257 // Returns the JavaThread associated with the thread obj
258 static JavaThread* thread(oop java_thread);
259 // Set JavaThread for instance
260 static void set_thread(oop java_thread, JavaThread* thread);
261 // Name
262 static typeArrayOop name(oop java_thread);
263 static void set_name(oop java_thread, typeArrayOop name);
264 // Priority
265 static ThreadPriority priority(oop java_thread);
266 static void set_priority(oop java_thread, ThreadPriority priority);
267 // Thread group
268 static oop threadGroup(oop java_thread);
269 // Stillborn
270 static bool is_stillborn(oop java_thread);
271 static void set_stillborn(oop java_thread);
272 // Alive (NOTE: this is not really a field, but provides the correct
273 // definition without doing a Java call)
274 static bool is_alive(oop java_thread);
275 // Daemon
276 static bool is_daemon(oop java_thread);
277 static void set_daemon(oop java_thread);
278 // Context ClassLoader
279 static oop context_class_loader(oop java_thread);
280 // Control context
281 static oop inherited_access_control_context(oop java_thread);
282 // Stack size hint
283 static jlong stackSize(oop java_thread);
284 // Thread ID
285 static jlong thread_id(oop java_thread);
286
287 // Blocker object responsible for thread parking
288 static oop park_blocker(oop java_thread);
289
290 // Pointer to type-stable park handler, encoded as jlong.
291 // Should be set when apparently null
292 // For details, see unsafe.cpp Unsafe_Unpark
293 static jlong park_event(oop java_thread);
294 static bool set_park_event(oop java_thread, jlong ptr);
295
296 // Java Thread Status for JVMTI and M&M use.
297 // This thread status info is saved in threadStatus field of
298 // java.lang.Thread java class.
299 enum ThreadStatus {
300 NEW = 0,
301 RUNNABLE = JVMTI_THREAD_STATE_ALIVE + // runnable / running
302 JVMTI_THREAD_STATE_RUNNABLE,
303 SLEEPING = JVMTI_THREAD_STATE_ALIVE + // Thread.sleep()
304 JVMTI_THREAD_STATE_WAITING +
305 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
306 JVMTI_THREAD_STATE_SLEEPING,
307 IN_OBJECT_WAIT = JVMTI_THREAD_STATE_ALIVE + // Object.wait()
308 JVMTI_THREAD_STATE_WAITING +
309 JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
310 JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
311 IN_OBJECT_WAIT_TIMED = JVMTI_THREAD_STATE_ALIVE + // Object.wait(long)
312 JVMTI_THREAD_STATE_WAITING +
313 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
314 JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
315 PARKED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park()
316 JVMTI_THREAD_STATE_WAITING +
317 JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
318 JVMTI_THREAD_STATE_PARKED,
319 PARKED_TIMED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park(long)
320 JVMTI_THREAD_STATE_WAITING +
321 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
322 JVMTI_THREAD_STATE_PARKED,
323 BLOCKED_ON_MONITOR_ENTER = JVMTI_THREAD_STATE_ALIVE + // (re-)entering a synchronization block
324 JVMTI_THREAD_STATE_BLOCKED_ON_MONITOR_ENTER,
325 TERMINATED = JVMTI_THREAD_STATE_TERMINATED
326 };
327 // Write thread status info to threadStatus field of java.lang.Thread.
328 static void set_thread_status(oop java_thread_oop, ThreadStatus status);
329 // Read thread status info from threadStatus field of java.lang.Thread.
330 static ThreadStatus get_thread_status(oop java_thread_oop);
331
332 static const char* thread_status_name(oop java_thread_oop);
333
334 // Debugging
335 friend class JavaClasses;
336 };
337
338 // Interface to java.lang.ThreadGroup objects
339
340 class java_lang_ThreadGroup : AllStatic {
341 private:
342 static int _parent_offset;
343 static int _name_offset;
344 static int _threads_offset;
345 static int _groups_offset;
346 static int _maxPriority_offset;
347 static int _destroyed_offset;
348 static int _daemon_offset;
349 static int _vmAllowSuspension_offset;
350 static int _nthreads_offset;
351 static int _ngroups_offset;
352
353 static void compute_offsets();
354
355 public:
356 // parent ThreadGroup
357 static oop parent(oop java_thread_group);
358 // name
359 static typeArrayOop name(oop java_thread_group);
360 // ("name as oop" accessor is not necessary)
361 // Number of threads in group
362 static int nthreads(oop java_thread_group);
363 // threads
364 static objArrayOop threads(oop java_thread_group);
365 // Number of threads in group
366 static int ngroups(oop java_thread_group);
367 // groups
368 static objArrayOop groups(oop java_thread_group);
369 // maxPriority in group
370 static ThreadPriority maxPriority(oop java_thread_group);
371 // Destroyed
372 static bool is_destroyed(oop java_thread_group);
373 // Daemon
374 static bool is_daemon(oop java_thread_group);
375 // vmAllowSuspension
376 static bool is_vmAllowSuspension(oop java_thread_group);
377 // Debugging
378 friend class JavaClasses;
379 };
380
381
382
383 // Interface to java.lang.Throwable objects
384
385 class java_lang_Throwable: AllStatic {
386 friend class BacktraceBuilder;
387
388 private:
389 // Offsets
390 enum {
391 hc_backtrace_offset = 0,
392 hc_detailMessage_offset = 1,
393 hc_cause_offset = 2, // New since 1.4
394 hc_stackTrace_offset = 3 // New since 1.4
395 };
396 // Trace constants
397 enum {
398 trace_methods_offset = 0,
399 trace_bcis_offset = 1,
400 trace_next_offset = 2,
401 trace_size = 3,
402 trace_chunk_size = 32
403 };
404
405 static int backtrace_offset;
406 static int detailMessage_offset;
407 static int cause_offset;
408 static int stackTrace_offset;
409
410 // Printing
411 static char* print_stack_element_to_buffer(methodOop method, int bci);
412 static void print_to_stream(Handle stream, const char* str);
413 // StackTrace (programmatic access, new since 1.4)
414 static void clear_stacktrace(oop throwable);
415 // No stack trace available
416 static const char* no_stack_trace_message();
417
418 public:
419 // Backtrace
420 static oop backtrace(oop throwable);
421 static void set_backtrace(oop throwable, oop value);
422 // Needed by JVMTI to filter out this internal field.
423 static int get_backtrace_offset() { return backtrace_offset;}
424 static int get_detailMessage_offset() { return detailMessage_offset;}
425 // Message
426 static oop message(oop throwable);
427 static oop message(Handle throwable);
428 static void set_message(oop throwable, oop value);
429 // Print stack trace stored in exception by call-back to Java
430 // Note: this is no longer used in Merlin, but we still suppport
431 // it for compatibility.
432 static void print_stack_trace(oop throwable, oop print_stream);
433 static void print_stack_element(Handle stream, methodOop method, int bci);
434 static void print_stack_element(outputStream *st, methodOop method, int bci);
435 static void print_stack_usage(Handle stream);
436
437 // Allocate space for backtrace (created but stack trace not filled in)
438 static void allocate_backtrace(Handle throwable, TRAPS);
439 // Fill in current stack trace for throwable with preallocated backtrace (no GC)
440 static void fill_in_stack_trace_of_preallocated_backtrace(Handle throwable);
441
442 // Fill in current stack trace, can cause GC
443 static void fill_in_stack_trace(Handle throwable, TRAPS);
444 static void fill_in_stack_trace(Handle throwable);
445 // Programmatic access to stack trace
446 static oop get_stack_trace_element(oop throwable, int index, TRAPS);
447 static int get_stack_trace_depth(oop throwable, TRAPS);
448 // Printing
449 static void print(oop throwable, outputStream* st);
450 static void print(Handle throwable, outputStream* st);
451 static void print_stack_trace(oop throwable, outputStream* st);
452 // Debugging
453 friend class JavaClasses;
454 };
455
456
457 // Interface to java.lang.reflect.AccessibleObject objects
458
459 class java_lang_reflect_AccessibleObject: AllStatic {
460 private:
461 // Note that to reduce dependencies on the JDK we compute these
462 // offsets at run-time.
463 static int override_offset;
464
465 static void compute_offsets();
466
467 public:
468 // Accessors
469 static jboolean override(oop reflect);
470 static void set_override(oop reflect, jboolean value);
471
472 // Debugging
473 friend class JavaClasses;
474 };
475
476
477 // Interface to java.lang.reflect.Method objects
478
479 class java_lang_reflect_Method : public java_lang_reflect_AccessibleObject {
480 private:
481 // Note that to reduce dependencies on the JDK we compute these
482 // offsets at run-time.
483 static int clazz_offset;
484 static int name_offset;
485 static int returnType_offset;
486 static int parameterTypes_offset;
487 static int exceptionTypes_offset;
488 static int slot_offset;
489 static int modifiers_offset;
490 static int signature_offset;
491 static int annotations_offset;
492 static int parameter_annotations_offset;
493 static int annotation_default_offset;
494
495 static void compute_offsets();
496
497 public:
498 // Allocation
499 static Handle create(TRAPS);
500
501 // Accessors
502 static oop clazz(oop reflect);
503 static void set_clazz(oop reflect, oop value);
504
505 static oop name(oop method);
506 static void set_name(oop method, oop value);
507
508 static oop return_type(oop method);
509 static void set_return_type(oop method, oop value);
510
511 static oop parameter_types(oop method);
512 static void set_parameter_types(oop method, oop value);
513
514 static oop exception_types(oop method);
515 static void set_exception_types(oop method, oop value);
516
517 static int slot(oop reflect);
518 static void set_slot(oop reflect, int value);
519
520 static int modifiers(oop method);
521 static void set_modifiers(oop method, int value);
522
523 static bool has_signature_field();
524 static oop signature(oop method);
525 static void set_signature(oop method, oop value);
526
527 static bool has_annotations_field();
528 static oop annotations(oop method);
529 static void set_annotations(oop method, oop value);
530
531 static bool has_parameter_annotations_field();
532 static oop parameter_annotations(oop method);
533 static void set_parameter_annotations(oop method, oop value);
534
535 static bool has_annotation_default_field();
536 static oop annotation_default(oop method);
537 static void set_annotation_default(oop method, oop value);
538
539 // Debugging
540 friend class JavaClasses;
541 };
542
543
544 // Interface to java.lang.reflect.Constructor objects
545
546 class java_lang_reflect_Constructor : public java_lang_reflect_AccessibleObject {
547 private:
548 // Note that to reduce dependencies on the JDK we compute these
549 // offsets at run-time.
550 static int clazz_offset;
551 static int parameterTypes_offset;
552 static int exceptionTypes_offset;
553 static int slot_offset;
554 static int modifiers_offset;
555 static int signature_offset;
556 static int annotations_offset;
557 static int parameter_annotations_offset;
558
559 static void compute_offsets();
560
561 public:
562 // Allocation
563 static Handle create(TRAPS);
564
565 // Accessors
566 static oop clazz(oop reflect);
567 static void set_clazz(oop reflect, oop value);
568
569 static oop parameter_types(oop constructor);
570 static void set_parameter_types(oop constructor, oop value);
571
572 static oop exception_types(oop constructor);
573 static void set_exception_types(oop constructor, oop value);
574
575 static int slot(oop reflect);
576 static void set_slot(oop reflect, int value);
577
578 static int modifiers(oop constructor);
579 static void set_modifiers(oop constructor, int value);
580
581 static bool has_signature_field();
582 static oop signature(oop constructor);
583 static void set_signature(oop constructor, oop value);
584
585 static bool has_annotations_field();
586 static oop annotations(oop constructor);
587 static void set_annotations(oop constructor, oop value);
588
589 static bool has_parameter_annotations_field();
590 static oop parameter_annotations(oop method);
591 static void set_parameter_annotations(oop method, oop value);
592
593 // Debugging
594 friend class JavaClasses;
595 };
596
597
598 // Interface to java.lang.reflect.Field objects
599
600 class java_lang_reflect_Field : public java_lang_reflect_AccessibleObject {
601 private:
602 // Note that to reduce dependencies on the JDK we compute these
603 // offsets at run-time.
604 static int clazz_offset;
605 static int name_offset;
606 static int type_offset;
607 static int slot_offset;
608 static int modifiers_offset;
609 static int signature_offset;
610 static int annotations_offset;
611
612 static void compute_offsets();
613
614 public:
615 // Allocation
616 static Handle create(TRAPS);
617
618 // Accessors
619 static oop clazz(oop reflect);
620 static void set_clazz(oop reflect, oop value);
621
622 static oop name(oop field);
623 static void set_name(oop field, oop value);
624
625 static oop type(oop field);
626 static void set_type(oop field, oop value);
627
628 static int slot(oop reflect);
629 static void set_slot(oop reflect, int value);
630
631 static int modifiers(oop field);
632 static void set_modifiers(oop field, int value);
633
634 static bool has_signature_field();
635 static oop signature(oop constructor);
636 static void set_signature(oop constructor, oop value);
637
638 static bool has_annotations_field();
639 static oop annotations(oop constructor);
640 static void set_annotations(oop constructor, oop value);
641
642 static bool has_parameter_annotations_field();
643 static oop parameter_annotations(oop method);
644 static void set_parameter_annotations(oop method, oop value);
645
646 static bool has_annotation_default_field();
647 static oop annotation_default(oop method);
648 static void set_annotation_default(oop method, oop value);
649
650 // Debugging
651 friend class JavaClasses;
652 };
653
654 // Interface to sun.reflect.ConstantPool objects
655 class sun_reflect_ConstantPool {
656 private:
657 // Note that to reduce dependencies on the JDK we compute these
658 // offsets at run-time.
659 static int _cp_oop_offset;
660
661 static void compute_offsets();
662
663 public:
664 // Allocation
665 static Handle create(TRAPS);
666
667 // Accessors
668 static oop cp_oop(oop reflect);
669 static void set_cp_oop(oop reflect, oop value);
670 static int cp_oop_offset() {
671 return _cp_oop_offset;
672 }
673
674 // Debugging
675 friend class JavaClasses;
676 };
677
678 // Interface to sun.reflect.UnsafeStaticFieldAccessorImpl objects
679 class sun_reflect_UnsafeStaticFieldAccessorImpl {
680 private:
681 static int _base_offset;
682 static void compute_offsets();
683
684 public:
685 static int base_offset() {
686 return _base_offset;
687 }
688
689 // Debugging
690 friend class JavaClasses;
691 };
692
693 // Interface to java.lang primitive type boxing objects:
694 // - java.lang.Boolean
695 // - java.lang.Character
696 // - java.lang.Float
697 // - java.lang.Double
698 // - java.lang.Byte
699 // - java.lang.Short
700 // - java.lang.Integer
701 // - java.lang.Long
702
703 // This could be separated out into 8 individual classes.
704
705 class java_lang_boxing_object: AllStatic {
706 private:
707 enum {
708 hc_value_offset = 0
709 };
710 static int value_offset;
711 static int long_value_offset;
712
713 static oop initialize_and_allocate(BasicType type, TRAPS);
714 public:
715 // Allocation. Returns a boxed value, or NULL for invalid type.
716 static oop create(BasicType type, jvalue* value, TRAPS);
717 // Accessors. Returns the basic type being boxed, or T_ILLEGAL for invalid oop.
718 static BasicType get_value(oop box, jvalue* value);
719 static BasicType set_value(oop box, jvalue* value);
720 static BasicType basic_type(oop box);
721 static bool is_instance(oop box) { return basic_type(box) != T_ILLEGAL; }
722 static bool is_instance(oop box, BasicType type) { return basic_type(box) == type; }
723 static void print(oop box, outputStream* st) { jvalue value; print(get_value(box, &value), &value, st); }
724 static void print(BasicType type, jvalue* value, outputStream* st);
725
726 static int value_offset_in_bytes(BasicType type) {
727 return ( type == T_LONG || type == T_DOUBLE ) ? long_value_offset :
728 value_offset;
729 }
730
731 // Debugging
732 friend class JavaClasses;
733 };
734
735
736
737 // Interface to java.lang.ref.Reference objects
738
739 class java_lang_ref_Reference: AllStatic {
740 public:
741 enum {
742 hc_referent_offset = 0,
743 hc_queue_offset = 1,
744 hc_next_offset = 2,
745 hc_discovered_offset = 3 // Is not last, see SoftRefs.
746 };
747 enum {
748 hc_static_lock_offset = 0,
749 hc_static_pending_offset = 1
750 };
751
752 static int referent_offset;
753 static int queue_offset;
754 static int next_offset;
755 static int discovered_offset;
756 static int static_lock_offset;
757 static int static_pending_offset;
758 static int number_of_fake_oop_fields;
759
760 // Accessors
761 static oop referent(oop ref) {
762 return ref->obj_field(referent_offset);
763 }
764 static void set_referent(oop ref, oop value) {
765 ref->obj_field_put(referent_offset, value);
766 }
767 static void set_referent_raw(oop ref, oop value) {
768 ref->obj_field_raw_put(referent_offset, value);
769 }
770 static HeapWord* referent_addr(oop ref) {
771 return ref->obj_field_addr<HeapWord>(referent_offset);
772 }
773 static oop next(oop ref) {
774 return ref->obj_field(next_offset);
775 }
776 static void set_next(oop ref, oop value) {
777 ref->obj_field_put(next_offset, value);
778 }
779 static void set_next_raw(oop ref, oop value) {
780 ref->obj_field_raw_put(next_offset, value);
781 }
782 static HeapWord* next_addr(oop ref) {
783 return ref->obj_field_addr<HeapWord>(next_offset);
784 }
785 static oop discovered(oop ref) {
786 return ref->obj_field(discovered_offset);
787 }
788 static void set_discovered(oop ref, oop value) {
789 ref->obj_field_put(discovered_offset, value);
790 }
791 static void set_discovered_raw(oop ref, oop value) {
792 ref->obj_field_raw_put(discovered_offset, value);
793 }
794 static HeapWord* discovered_addr(oop ref) {
795 return ref->obj_field_addr<HeapWord>(discovered_offset);
796 }
797 // Accessors for statics
798 static oop pending_list_lock();
799 static oop pending_list();
800
801 static HeapWord* pending_list_addr();
802 };
803
804
805 // Interface to java.lang.ref.SoftReference objects
806
807 class java_lang_ref_SoftReference: public java_lang_ref_Reference {
808 public:
809 enum {
810 // The timestamp is a long field and may need to be adjusted for alignment.
811 hc_timestamp_offset = hc_discovered_offset + 1
812 };
813 enum {
814 hc_static_clock_offset = 0
815 };
816
817 static int timestamp_offset;
818 static int static_clock_offset;
819
820 // Accessors
821 static jlong timestamp(oop ref);
822
823 // Accessors for statics
824 static jlong clock();
825 static void set_clock(jlong value);
826 };
827
828
829 // Interface to java.lang.invoke.MethodHandle objects
830
831 class MethodHandleEntry;
832
833 class java_lang_invoke_MethodHandle: AllStatic {
834 friend class JavaClasses;
835
836 private:
837 static int _vmentry_offset; // assembly code trampoline for MH
838 static int _vmtarget_offset; // class-specific target reference
839 static int _type_offset; // the MethodType of this MH
840 static int _vmslots_offset; // OPTIONAL hoisted type.form.vmslots
841
842 static void compute_offsets();
843
844 public:
845 // Accessors
846 static oop type(oop mh);
847 static void set_type(oop mh, oop mtype);
848
849 static oop vmtarget(oop mh);
850 static void set_vmtarget(oop mh, oop target);
851
852 static MethodHandleEntry* vmentry(oop mh);
853 static void set_vmentry(oop mh, MethodHandleEntry* data);
854
855 static int vmslots(oop mh);
856 static void init_vmslots(oop mh);
857 static int compute_vmslots(oop mh);
858
859 // Testers
860 static bool is_subclass(klassOop klass) {
861 return Klass::cast(klass)->is_subclass_of(SystemDictionary::MethodHandle_klass());
862 }
863 static bool is_instance(oop obj) {
864 return obj != NULL && is_subclass(obj->klass());
865 }
866
867 // Accessors for code generation:
868 static int type_offset_in_bytes() { return _type_offset; }
869 static int vmtarget_offset_in_bytes() { return _vmtarget_offset; }
870 static int vmentry_offset_in_bytes() { return _vmentry_offset; }
871 static int vmslots_offset_in_bytes() { return _vmslots_offset; }
872 };
873
874 class java_lang_invoke_DirectMethodHandle: public java_lang_invoke_MethodHandle {
875 friend class JavaClasses;
876
877 private:
878 // _vmtarget_offset; // method or class or interface
879 static int _vmindex_offset; // negative or vtable idx or itable idx
880 static void compute_offsets();
881
882 public:
883 // Accessors
884 static int vmindex(oop mh);
885 static void set_vmindex(oop mh, int index);
886
887 // Testers
888 static bool is_subclass(klassOop klass) {
889 return Klass::cast(klass)->is_subclass_of(SystemDictionary::DirectMethodHandle_klass());
890 }
891 static bool is_instance(oop obj) {
892 return obj != NULL && is_subclass(obj->klass());
893 }
894
895 // Accessors for code generation:
896 static int vmindex_offset_in_bytes() { return _vmindex_offset; }
897 };
898
899 class java_lang_invoke_BoundMethodHandle: public java_lang_invoke_MethodHandle {
900 friend class JavaClasses;
901
902 private:
903 static int _argument_offset; // argument value bound into this MH
904 static int _vmargslot_offset; // relevant argument slot (<= vmslots)
905 static void compute_offsets();
906
907 public:
908 static oop argument(oop mh);
909 static void set_argument(oop mh, oop ref);
910
911 static jint vmargslot(oop mh);
912 static void set_vmargslot(oop mh, jint slot);
913
914 // Testers
915 static bool is_subclass(klassOop klass) {
916 return Klass::cast(klass)->is_subclass_of(SystemDictionary::BoundMethodHandle_klass());
917 }
918 static bool is_instance(oop obj) {
919 return obj != NULL && is_subclass(obj->klass());
920 }
921
922 static int argument_offset_in_bytes() { return _argument_offset; }
923 static int vmargslot_offset_in_bytes() { return _vmargslot_offset; }
924 };
925
926 class java_lang_invoke_AdapterMethodHandle: public java_lang_invoke_BoundMethodHandle {
927 friend class JavaClasses;
928
929 private:
930 static int _conversion_offset; // type of conversion to apply
931 static void compute_offsets();
932
933 public:
934 static int conversion(oop mh);
935 static void set_conversion(oop mh, int conv);
936
937 // Testers
938 static bool is_subclass(klassOop klass) {
939 return Klass::cast(klass)->is_subclass_of(SystemDictionary::AdapterMethodHandle_klass());
940 }
941 static bool is_instance(oop obj) {
942 return obj != NULL && is_subclass(obj->klass());
943 }
944
945 // Relevant integer codes (keep these in synch. with MethodHandleNatives.Constants):
946 enum {
947 OP_RETYPE_ONLY = 0x0, // no argument changes; straight retype
948 OP_RETYPE_RAW = 0x1, // straight retype, trusted (void->int, Object->T)
949 OP_CHECK_CAST = 0x2, // ref-to-ref conversion; requires a Class argument
950 OP_PRIM_TO_PRIM = 0x3, // converts from one primitive to another
951 OP_REF_TO_PRIM = 0x4, // unboxes a wrapper to produce a primitive
952 OP_PRIM_TO_REF = 0x5, // boxes a primitive into a wrapper (NYI)
953 OP_SWAP_ARGS = 0x6, // swap arguments (vminfo is 2nd arg)
954 OP_ROT_ARGS = 0x7, // rotate arguments (vminfo is displaced arg)
955 OP_DUP_ARGS = 0x8, // duplicates one or more arguments (at TOS)
956 OP_DROP_ARGS = 0x9, // remove one or more argument slots
957 OP_COLLECT_ARGS = 0xA, // combine one or more arguments into a varargs (NYI)
958 OP_SPREAD_ARGS = 0xB, // expand in place a varargs array (of known size)
959 OP_FLYBY = 0xC, // operate first on reified argument list (NYI)
960 OP_RICOCHET = 0xD, // run an adapter chain on the return value (NYI)
961 CONV_OP_LIMIT = 0xE, // limit of CONV_OP enumeration
962
963 CONV_OP_MASK = 0xF00, // this nybble contains the conversion op field
964 CONV_VMINFO_MASK = 0x0FF, // LSB is reserved for JVM use
965 CONV_VMINFO_SHIFT = 0, // position of bits in CONV_VMINFO_MASK
966 CONV_OP_SHIFT = 8, // position of bits in CONV_OP_MASK
967 CONV_DEST_TYPE_SHIFT = 12, // byte 2 has the adapter BasicType (if needed)
968 CONV_SRC_TYPE_SHIFT = 16, // byte 2 has the source BasicType (if needed)
969 CONV_STACK_MOVE_SHIFT = 20, // high 12 bits give signed SP change
970 CONV_STACK_MOVE_MASK = (1 << (32 - CONV_STACK_MOVE_SHIFT)) - 1
971 };
972
973 static int conversion_offset_in_bytes() { return _conversion_offset; }
974 };
975
976
977 // Interface to java.lang.invoke.MemberName objects
978 // (These are a private interface for Java code to query the class hierarchy.)
979
980 class java_lang_invoke_MemberName: AllStatic {
981 friend class JavaClasses;
982
983 private:
984 // From java.lang.invoke.MemberName:
985 // private Class<?> clazz; // class in which the method is defined
986 // private String name; // may be null if not yet materialized
987 // private Object type; // may be null if not yet materialized
988 // private int flags; // modifier bits; see reflect.Modifier
989 // private Object vmtarget; // VM-specific target value
990 // private int vmindex; // method index within class or interface
991 static int _clazz_offset;
992 static int _name_offset;
993 static int _type_offset;
994 static int _flags_offset;
995 static int _vmtarget_offset;
996 static int _vmindex_offset;
997
998 static void compute_offsets();
999
1000 public:
1001 // Accessors
1002 static oop clazz(oop mname);
1003 static void set_clazz(oop mname, oop clazz);
1004
1005 static oop type(oop mname);
1006 static void set_type(oop mname, oop type);
1007
1008 static oop name(oop mname);
1009 static void set_name(oop mname, oop name);
1010
1011 static int flags(oop mname);
1012 static void set_flags(oop mname, int flags);
1013
1014 static int modifiers(oop mname) { return (u2) flags(mname); }
1015 static void set_modifiers(oop mname, int mods)
1016 { set_flags(mname, (flags(mname) &~ (u2)-1) | (u2)mods); }
1017
1018 static oop vmtarget(oop mname);
1019 static void set_vmtarget(oop mname, oop target);
1020
1021 static int vmindex(oop mname);
1022 static void set_vmindex(oop mname, int index);
1023
1024 // Testers
1025 static bool is_subclass(klassOop klass) {
1026 return Klass::cast(klass)->is_subclass_of(SystemDictionary::MemberName_klass());
1027 }
1028 static bool is_instance(oop obj) {
1029 return obj != NULL && is_subclass(obj->klass());
1030 }
1031
1032 // Relevant integer codes (keep these in synch. with MethodHandleNatives.Constants):
1033 enum {
1034 MN_IS_METHOD = 0x00010000, // method (not constructor)
1035 MN_IS_CONSTRUCTOR = 0x00020000, // constructor
1036 MN_IS_FIELD = 0x00040000, // field
1037 MN_IS_TYPE = 0x00080000, // nested type
1038 MN_SEARCH_SUPERCLASSES = 0x00100000, // for MHN.getMembers
1039 MN_SEARCH_INTERFACES = 0x00200000, // for MHN.getMembers
1040 VM_INDEX_UNINITIALIZED = -99
1041 };
1042
1043 // Accessors for code generation:
1044 static int clazz_offset_in_bytes() { return _clazz_offset; }
1045 static int type_offset_in_bytes() { return _type_offset; }
1046 static int name_offset_in_bytes() { return _name_offset; }
1047 static int flags_offset_in_bytes() { return _flags_offset; }
1048 static int vmtarget_offset_in_bytes() { return _vmtarget_offset; }
1049 static int vmindex_offset_in_bytes() { return _vmindex_offset; }
1050 };
1051
1052
1053 // Interface to java.lang.invoke.MethodType objects
1054
1055 class java_lang_invoke_MethodType: AllStatic {
1056 friend class JavaClasses;
1057
1058 private:
1059 static int _rtype_offset;
1060 static int _ptypes_offset;
1061 static int _form_offset;
1062
1063 static void compute_offsets();
1064
1065 public:
1066 // Accessors
1067 static oop rtype(oop mt);
1068 static objArrayOop ptypes(oop mt);
1069 static oop form(oop mt);
1070
1071 static oop ptype(oop mt, int index);
1072 static int ptype_count(oop mt);
1073
1074 static Symbol* as_signature(oop mt, bool intern_if_not_found, TRAPS);
1075 static void print_signature(oop mt, outputStream* st);
1076
1077 static bool is_instance(oop obj) {
1078 return obj != NULL && obj->klass() == SystemDictionary::MethodType_klass();
1079 }
1080
1081 // Accessors for code generation:
1082 static int rtype_offset_in_bytes() { return _rtype_offset; }
1083 static int ptypes_offset_in_bytes() { return _ptypes_offset; }
1084 static int form_offset_in_bytes() { return _form_offset; }
1085 };
1086
1087 class java_lang_invoke_MethodTypeForm: AllStatic {
1088 friend class JavaClasses;
1089
1090 private:
1091 static int _vmslots_offset; // number of argument slots needed
1092 static int _erasedType_offset; // erasedType = canonical MethodType
1093 static int _genericInvoker_offset; // genericInvoker = adapter for invokeGeneric
1094
1095 static void compute_offsets();
1096
1097 public:
1098 // Accessors
1099 static int vmslots(oop mtform);
1100 static oop erasedType(oop mtform);
1101 static oop genericInvoker(oop mtform);
1102
1103 // Accessors for code generation:
1104 static int vmslots_offset_in_bytes() { return _vmslots_offset; }
1105 static int erasedType_offset_in_bytes() { return _erasedType_offset; }
1106 static int genericInvoker_offset_in_bytes() { return _genericInvoker_offset; }
1107 };
1108
1109
1110 // Interface to java.lang.invoke.CallSite objects
1111
1112 class java_lang_invoke_CallSite: AllStatic {
1113 friend class JavaClasses;
1114
1115 private:
1116 static int _target_offset;
1117 static int _caller_method_offset;
1118 static int _caller_bci_offset;
1119
1120 static void compute_offsets();
1121
1122 public:
1123 // Accessors
1124 static oop target(oop site);
1125 static void set_target(oop site, oop target);
1126
1127 static oop caller_method(oop site);
1128 static void set_caller_method(oop site, oop ref);
1129
1130 static jint caller_bci(oop site);
1131 static void set_caller_bci(oop site, jint bci);
1132
1133 // Testers
1134 static bool is_subclass(klassOop klass) {
1135 return Klass::cast(klass)->is_subclass_of(SystemDictionary::CallSite_klass());
1136 }
1137 static bool is_instance(oop obj) {
1138 return obj != NULL && is_subclass(obj->klass());
1139 }
1140
1141 // Accessors for code generation:
1142 static int target_offset_in_bytes() { return _target_offset; }
1143 static int caller_method_offset_in_bytes() { return _caller_method_offset; }
1144 static int caller_bci_offset_in_bytes() { return _caller_bci_offset; }
1145 };
1146
1147
1148 // Interface to java.security.AccessControlContext objects
1149
1150 class java_security_AccessControlContext: AllStatic {
1151 private:
1152 // Note that for this class the layout changed between JDK1.2 and JDK1.3,
1153 // so we compute the offsets at startup rather than hard-wiring them.
1154 static int _context_offset;
1155 static int _privilegedContext_offset;
1156 static int _isPrivileged_offset;
1157
1158 static void compute_offsets();
1159 public:
1160 static oop create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS);
1161
1162 // Debugging/initialization
1163 friend class JavaClasses;
1164 };
1165
1166
1167 // Interface to java.lang.ClassLoader objects
1168
1169 class java_lang_ClassLoader : AllStatic {
1170 private:
1171 enum {
1172 hc_parent_offset = 0
1173 };
1174
1175 static int parent_offset;
1176
1177 public:
1178 static oop parent(oop loader);
1179
1180 static bool is_trusted_loader(oop loader);
1181
1182 // Fix for 4474172
1183 static oop non_reflection_class_loader(oop loader);
1184
1185 // Debugging
1186 friend class JavaClasses;
1187 };
1188
1189
1190 // Interface to java.lang.System objects
1191
1192 class java_lang_System : AllStatic {
1193 private:
1194 enum {
1195 hc_static_in_offset = 0,
1196 hc_static_out_offset = 1,
1197 hc_static_err_offset = 2
1198 };
1199
1200 static int static_in_offset;
1201 static int static_out_offset;
1202 static int static_err_offset;
1203
1204 public:
1205 static int in_offset_in_bytes();
1206 static int out_offset_in_bytes();
1207 static int err_offset_in_bytes();
1208
1209 // Debugging
1210 friend class JavaClasses;
1211 };
1212
1213
1214 // Interface to java.lang.StackTraceElement objects
1215
1216 class java_lang_StackTraceElement: AllStatic {
1217 private:
1218 enum {
1219 hc_declaringClass_offset = 0,
1220 hc_methodName_offset = 1,
1221 hc_fileName_offset = 2,
1222 hc_lineNumber_offset = 3
1223 };
1224
1225 static int declaringClass_offset;
1226 static int methodName_offset;
1227 static int fileName_offset;
1228 static int lineNumber_offset;
1229
1230 public:
1231 // Setters
1232 static void set_declaringClass(oop element, oop value);
1233 static void set_methodName(oop element, oop value);
1234 static void set_fileName(oop element, oop value);
1235 static void set_lineNumber(oop element, int value);
1236
1237 // Create an instance of StackTraceElement
1238 static oop create(methodHandle m, int bci, TRAPS);
1239
1240 // Debugging
1241 friend class JavaClasses;
1242 };
1243
1244
1245 // Interface to java.lang.AssertionStatusDirectives objects
1246
1247 class java_lang_AssertionStatusDirectives: AllStatic {
1248 private:
1249 enum {
1250 hc_classes_offset,
1251 hc_classEnabled_offset,
1252 hc_packages_offset,
1253 hc_packageEnabled_offset,
1254 hc_deflt_offset
1255 };
1256
1257 static int classes_offset;
1258 static int classEnabled_offset;
1259 static int packages_offset;
1260 static int packageEnabled_offset;
1261 static int deflt_offset;
1262
1263 public:
1264 // Setters
1265 static void set_classes(oop obj, oop val);
1266 static void set_classEnabled(oop obj, oop val);
1267 static void set_packages(oop obj, oop val);
1268 static void set_packageEnabled(oop obj, oop val);
1269 static void set_deflt(oop obj, bool val);
1270 // Debugging
1271 friend class JavaClasses;
1272 };
1273
1274
1275 class java_nio_Buffer: AllStatic {
1276 private:
1277 static int _limit_offset;
1278
1279 public:
1280 static int limit_offset();
1281 static void compute_offsets();
1282 };
1283
1284 class sun_misc_AtomicLongCSImpl: AllStatic {
1285 private:
1286 static int _value_offset;
1287
1288 public:
1289 static int value_offset();
1290 static void compute_offsets();
1291 };
1292
1293 class java_util_concurrent_locks_AbstractOwnableSynchronizer : AllStatic {
1294 private:
1295 static int _owner_offset;
1296 public:
1297 static void initialize(TRAPS);
1298 static oop get_owner_threadObj(oop obj);
1299 };
1300
1301 // Interface to hard-coded offset checking
1302
1303 class JavaClasses : AllStatic {
1304 private:
1305 static bool check_offset(const char *klass_name, int offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1306 static bool check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1307 static bool check_constant(const char *klass_name, int constant, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1308 public:
1309 static void compute_hard_coded_offsets();
1310 static void compute_offsets();
1311 static void check_offsets() PRODUCT_RETURN;
1312 };
1313
1314 #endif // SHARE_VM_CLASSFILE_JAVACLASSES_HPP