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(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 static bool equals(oop java_string, jchar* chars, int len);
113
114 // Conversion between '.' and '/' formats
115 static Handle externalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '/', '.', THREAD); }
116 static Handle internalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '.', '/', THREAD); }
117
118 // Conversion
119 static Symbol* as_symbol(Handle java_string, TRAPS);
120 static Symbol* as_symbol_or_null(oop java_string);
121
122 // Testers
123 static bool is_instance(oop obj) {
124 return obj != NULL && obj->klass() == SystemDictionary::String_klass();
125 }
126
127 // Debugging
128 static void print(Handle java_string, outputStream* st);
129 friend class JavaClasses;
130 };
131
132
133 // Interface to java.lang.Class objects
134
135 class java_lang_Class : AllStatic {
136 friend class VMStructs;
137 private:
138 // The fake offsets are added by the class loader when java.lang.Class is loaded
139
140 enum {
141 hc_klass_offset = 0,
142 hc_array_klass_offset = 1,
143 hc_resolved_constructor_offset = 2,
144 hc_size_offset = 3,
145 hc_static_oop_field_size = 4,
146 hc_number_of_fake_oop_fields = 3,
147 hc_number_of_fake_int_fields = 2
148 };
149
150 static int klass_offset;
151 static int resolved_constructor_offset;
152 static int array_klass_offset;
153 static int number_of_fake_oop_fields;
154
155 static int oop_size_offset;
156 static int static_oop_field_size_offset;
157
158 static void compute_offsets();
159 static bool offsets_computed;
160 static int classRedefinedCount_offset;
161 static int parallelCapable_offset;
162
163 public:
164 // Instance creation
165 static oop create_mirror(KlassHandle k, TRAPS);
166 static oop fixup_mirror(KlassHandle k, TRAPS);
167 static oop create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS);
168 // Conversion
169 static klassOop as_klassOop(oop java_class);
170 static BasicType as_BasicType(oop java_class, klassOop* reference_klass = NULL);
171 static BasicType as_BasicType(oop java_class, KlassHandle* reference_klass) {
172 klassOop refk_oop = NULL;
173 BasicType result = as_BasicType(java_class, &refk_oop);
174 (*reference_klass) = KlassHandle(refk_oop);
175 return result;
176 }
177 static Symbol* as_signature(oop java_class, bool intern_if_not_found, TRAPS);
178 static void print_signature(oop java_class, outputStream *st);
179 // Testing
180 static bool is_instance(oop obj) {
181 return obj != NULL && obj->klass() == SystemDictionary::Class_klass();
182 }
183 static bool is_primitive(oop java_class);
184 static BasicType primitive_type(oop java_class);
185 static oop primitive_mirror(BasicType t);
186 // JVM_NewInstance support
187 static methodOop resolved_constructor(oop java_class);
188 static void set_resolved_constructor(oop java_class, methodOop constructor);
189 // JVM_NewArray support
190 static klassOop array_klass(oop java_class);
191 static void set_array_klass(oop java_class, klassOop klass);
192 // compiler support for class operations
193 static int klass_offset_in_bytes() { return klass_offset; }
194 static int resolved_constructor_offset_in_bytes() { return resolved_constructor_offset; }
195 static int array_klass_offset_in_bytes() { return array_klass_offset; }
196 // Support for classRedefinedCount field
197 static int classRedefinedCount(oop the_class_mirror);
198 static void set_classRedefinedCount(oop the_class_mirror, int value);
199 // Support for parallelCapable field
200 static bool parallelCapable(oop the_class_mirror);
201
202 static int oop_size(oop java_class);
203 static void set_oop_size(oop java_class, int size);
204 static int static_oop_field_size(oop java_class);
205 static void set_static_oop_field_size(oop java_class, int size);
206
207 // Debugging
208 friend class JavaClasses;
209 friend class instanceKlass; // verification code accesses offsets
210 friend class ClassFileParser; // access to number_of_fake_fields
211 };
212
213 // Interface to java.lang.Thread objects
214
215 class java_lang_Thread : AllStatic {
216 private:
217 // Note that for this class the layout changed between JDK1.2 and JDK1.3,
218 // so we compute the offsets at startup rather than hard-wiring them.
219 static int _name_offset;
220 static int _group_offset;
221 static int _contextClassLoader_offset;
222 static int _inheritedAccessControlContext_offset;
223 static int _priority_offset;
224 static int _eetop_offset;
225 static int _daemon_offset;
226 static int _stillborn_offset;
227 static int _stackSize_offset;
228 static int _tid_offset;
229 static int _thread_status_offset;
230 static int _park_blocker_offset;
231 static int _park_event_offset ;
232
233 static void compute_offsets();
234
235 public:
236 // Instance creation
237 static oop create();
238 // Returns the JavaThread associated with the thread obj
239 static JavaThread* thread(oop java_thread);
240 // Set JavaThread for instance
241 static void set_thread(oop java_thread, JavaThread* thread);
242 // Name
243 static typeArrayOop name(oop java_thread);
244 static void set_name(oop java_thread, typeArrayOop name);
245 // Priority
246 static ThreadPriority priority(oop java_thread);
247 static void set_priority(oop java_thread, ThreadPriority priority);
248 // Thread group
249 static oop threadGroup(oop java_thread);
250 // Stillborn
251 static bool is_stillborn(oop java_thread);
252 static void set_stillborn(oop java_thread);
253 // Alive (NOTE: this is not really a field, but provides the correct
254 // definition without doing a Java call)
255 static bool is_alive(oop java_thread);
256 // Daemon
257 static bool is_daemon(oop java_thread);
258 static void set_daemon(oop java_thread);
259 // Context ClassLoader
260 static oop context_class_loader(oop java_thread);
261 // Control context
262 static oop inherited_access_control_context(oop java_thread);
263 // Stack size hint
264 static jlong stackSize(oop java_thread);
265 // Thread ID
266 static jlong thread_id(oop java_thread);
267
268 // Blocker object responsible for thread parking
269 static oop park_blocker(oop java_thread);
270
271 // Pointer to type-stable park handler, encoded as jlong.
272 // Should be set when apparently null
273 // For details, see unsafe.cpp Unsafe_Unpark
274 static jlong park_event(oop java_thread);
275 static bool set_park_event(oop java_thread, jlong ptr);
276
277 // Java Thread Status for JVMTI and M&M use.
278 // This thread status info is saved in threadStatus field of
279 // java.lang.Thread java class.
280 enum ThreadStatus {
281 NEW = 0,
282 RUNNABLE = JVMTI_THREAD_STATE_ALIVE + // runnable / running
283 JVMTI_THREAD_STATE_RUNNABLE,
284 SLEEPING = JVMTI_THREAD_STATE_ALIVE + // Thread.sleep()
285 JVMTI_THREAD_STATE_WAITING +
286 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
287 JVMTI_THREAD_STATE_SLEEPING,
288 IN_OBJECT_WAIT = JVMTI_THREAD_STATE_ALIVE + // Object.wait()
289 JVMTI_THREAD_STATE_WAITING +
290 JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
291 JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
292 IN_OBJECT_WAIT_TIMED = JVMTI_THREAD_STATE_ALIVE + // Object.wait(long)
293 JVMTI_THREAD_STATE_WAITING +
294 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
295 JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
296 PARKED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park()
297 JVMTI_THREAD_STATE_WAITING +
298 JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
299 JVMTI_THREAD_STATE_PARKED,
300 PARKED_TIMED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park(long)
301 JVMTI_THREAD_STATE_WAITING +
302 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
303 JVMTI_THREAD_STATE_PARKED,
304 BLOCKED_ON_MONITOR_ENTER = JVMTI_THREAD_STATE_ALIVE + // (re-)entering a synchronization block
305 JVMTI_THREAD_STATE_BLOCKED_ON_MONITOR_ENTER,
306 TERMINATED = JVMTI_THREAD_STATE_TERMINATED
307 };
308 // Write thread status info to threadStatus field of java.lang.Thread.
309 static void set_thread_status(oop java_thread_oop, ThreadStatus status);
310 // Read thread status info from threadStatus field of java.lang.Thread.
311 static ThreadStatus get_thread_status(oop java_thread_oop);
312
313 static const char* thread_status_name(oop java_thread_oop);
314
315 // Debugging
316 friend class JavaClasses;
317 };
318
319 // Interface to java.lang.ThreadGroup objects
320
321 class java_lang_ThreadGroup : AllStatic {
322 private:
323 static int _parent_offset;
324 static int _name_offset;
325 static int _threads_offset;
326 static int _groups_offset;
327 static int _maxPriority_offset;
328 static int _destroyed_offset;
329 static int _daemon_offset;
330 static int _vmAllowSuspension_offset;
331 static int _nthreads_offset;
332 static int _ngroups_offset;
333
334 static void compute_offsets();
335
336 public:
337 // parent ThreadGroup
338 static oop parent(oop java_thread_group);
339 // name
340 static typeArrayOop name(oop java_thread_group);
341 // ("name as oop" accessor is not necessary)
342 // Number of threads in group
343 static int nthreads(oop java_thread_group);
344 // threads
345 static objArrayOop threads(oop java_thread_group);
346 // Number of threads in group
347 static int ngroups(oop java_thread_group);
348 // groups
349 static objArrayOop groups(oop java_thread_group);
350 // maxPriority in group
351 static ThreadPriority maxPriority(oop java_thread_group);
352 // Destroyed
353 static bool is_destroyed(oop java_thread_group);
354 // Daemon
355 static bool is_daemon(oop java_thread_group);
356 // vmAllowSuspension
357 static bool is_vmAllowSuspension(oop java_thread_group);
358 // Debugging
359 friend class JavaClasses;
360 };
361
362
363
364 // Interface to java.lang.Throwable objects
365
366 class java_lang_Throwable: AllStatic {
367 friend class BacktraceBuilder;
368
369 private:
370 // Offsets
371 enum {
372 hc_backtrace_offset = 0,
373 hc_detailMessage_offset = 1,
374 hc_cause_offset = 2, // New since 1.4
375 hc_stackTrace_offset = 3 // New since 1.4
376 };
377 // Trace constants
378 enum {
379 trace_methods_offset = 0,
380 trace_bcis_offset = 1,
381 trace_next_offset = 2,
382 trace_size = 3,
383 trace_chunk_size = 32
384 };
385
386 static int backtrace_offset;
387 static int detailMessage_offset;
388 static int cause_offset;
389 static int stackTrace_offset;
390
391 // Printing
392 static char* print_stack_element_to_buffer(methodOop method, int bci);
393 static void print_to_stream(Handle stream, const char* str);
394 // StackTrace (programmatic access, new since 1.4)
395 static void clear_stacktrace(oop throwable);
396 // No stack trace available
397 static const char* no_stack_trace_message();
398
399 public:
400 // Backtrace
401 static oop backtrace(oop throwable);
402 static void set_backtrace(oop throwable, oop value);
403 // Needed by JVMTI to filter out this internal field.
404 static int get_backtrace_offset() { return backtrace_offset;}
405 static int get_detailMessage_offset() { return detailMessage_offset;}
406 // Message
407 static oop message(oop throwable);
408 static oop message(Handle throwable);
409 static void set_message(oop throwable, oop value);
410 // Print stack trace stored in exception by call-back to Java
411 // Note: this is no longer used in Merlin, but we still suppport
412 // it for compatibility.
413 static void print_stack_trace(oop throwable, oop print_stream);
414 static void print_stack_element(Handle stream, methodOop method, int bci);
415 static void print_stack_element(outputStream *st, methodOop method, int bci);
416 static void print_stack_usage(Handle stream);
417
418 // Allocate space for backtrace (created but stack trace not filled in)
419 static void allocate_backtrace(Handle throwable, TRAPS);
420 // Fill in current stack trace for throwable with preallocated backtrace (no GC)
421 static void fill_in_stack_trace_of_preallocated_backtrace(Handle throwable);
422
423 // Fill in current stack trace, can cause GC
424 static void fill_in_stack_trace(Handle throwable, TRAPS);
425 static void fill_in_stack_trace(Handle throwable);
426 // Programmatic access to stack trace
427 static oop get_stack_trace_element(oop throwable, int index, TRAPS);
428 static int get_stack_trace_depth(oop throwable, TRAPS);
429 // Printing
430 static void print(oop throwable, outputStream* st);
431 static void print(Handle throwable, outputStream* st);
432 static void print_stack_trace(oop throwable, outputStream* st);
433 // Debugging
434 friend class JavaClasses;
435 };
436
437
438 // Interface to java.lang.reflect.AccessibleObject objects
439
440 class java_lang_reflect_AccessibleObject: AllStatic {
441 private:
442 // Note that to reduce dependencies on the JDK we compute these
443 // offsets at run-time.
444 static int override_offset;
445
446 static void compute_offsets();
447
448 public:
449 // Accessors
450 static jboolean override(oop reflect);
451 static void set_override(oop reflect, jboolean value);
452
453 // Debugging
454 friend class JavaClasses;
455 };
456
457
458 // Interface to java.lang.reflect.Method objects
459
460 class java_lang_reflect_Method : public java_lang_reflect_AccessibleObject {
461 private:
462 // Note that to reduce dependencies on the JDK we compute these
463 // offsets at run-time.
464 static int clazz_offset;
465 static int name_offset;
466 static int returnType_offset;
467 static int parameterTypes_offset;
468 static int exceptionTypes_offset;
469 static int slot_offset;
470 static int modifiers_offset;
471 static int signature_offset;
472 static int annotations_offset;
473 static int parameter_annotations_offset;
474 static int annotation_default_offset;
475
476 static void compute_offsets();
477
478 public:
479 // Allocation
480 static Handle create(TRAPS);
481
482 // Accessors
483 static oop clazz(oop reflect);
484 static void set_clazz(oop reflect, oop value);
485
486 static oop name(oop method);
487 static void set_name(oop method, oop value);
488
489 static oop return_type(oop method);
490 static void set_return_type(oop method, oop value);
491
492 static oop parameter_types(oop method);
493 static void set_parameter_types(oop method, oop value);
494
495 static oop exception_types(oop method);
496 static void set_exception_types(oop method, oop value);
497
498 static int slot(oop reflect);
499 static void set_slot(oop reflect, int value);
500
501 static int modifiers(oop method);
502 static void set_modifiers(oop method, int value);
503
504 static bool has_signature_field();
505 static oop signature(oop method);
506 static void set_signature(oop method, oop value);
507
508 static bool has_annotations_field();
509 static oop annotations(oop method);
510 static void set_annotations(oop method, oop value);
511
512 static bool has_parameter_annotations_field();
513 static oop parameter_annotations(oop method);
514 static void set_parameter_annotations(oop method, oop value);
515
516 static bool has_annotation_default_field();
517 static oop annotation_default(oop method);
518 static void set_annotation_default(oop method, oop value);
519
520 // Debugging
521 friend class JavaClasses;
522 };
523
524
525 // Interface to java.lang.reflect.Constructor objects
526
527 class java_lang_reflect_Constructor : public java_lang_reflect_AccessibleObject {
528 private:
529 // Note that to reduce dependencies on the JDK we compute these
530 // offsets at run-time.
531 static int clazz_offset;
532 static int parameterTypes_offset;
533 static int exceptionTypes_offset;
534 static int slot_offset;
535 static int modifiers_offset;
536 static int signature_offset;
537 static int annotations_offset;
538 static int parameter_annotations_offset;
539
540 static void compute_offsets();
541
542 public:
543 // Allocation
544 static Handle create(TRAPS);
545
546 // Accessors
547 static oop clazz(oop reflect);
548 static void set_clazz(oop reflect, oop value);
549
550 static oop parameter_types(oop constructor);
551 static void set_parameter_types(oop constructor, oop value);
552
553 static oop exception_types(oop constructor);
554 static void set_exception_types(oop constructor, oop value);
555
556 static int slot(oop reflect);
557 static void set_slot(oop reflect, int value);
558
559 static int modifiers(oop constructor);
560 static void set_modifiers(oop constructor, int value);
561
562 static bool has_signature_field();
563 static oop signature(oop constructor);
564 static void set_signature(oop constructor, oop value);
565
566 static bool has_annotations_field();
567 static oop annotations(oop constructor);
568 static void set_annotations(oop constructor, oop value);
569
570 static bool has_parameter_annotations_field();
571 static oop parameter_annotations(oop method);
572 static void set_parameter_annotations(oop method, oop value);
573
574 // Debugging
575 friend class JavaClasses;
576 };
577
578
579 // Interface to java.lang.reflect.Field objects
580
581 class java_lang_reflect_Field : public java_lang_reflect_AccessibleObject {
582 private:
583 // Note that to reduce dependencies on the JDK we compute these
584 // offsets at run-time.
585 static int clazz_offset;
586 static int name_offset;
587 static int type_offset;
588 static int slot_offset;
589 static int modifiers_offset;
590 static int signature_offset;
591 static int annotations_offset;
592
593 static void compute_offsets();
594
595 public:
596 // Allocation
597 static Handle create(TRAPS);
598
599 // Accessors
600 static oop clazz(oop reflect);
601 static void set_clazz(oop reflect, oop value);
602
603 static oop name(oop field);
604 static void set_name(oop field, oop value);
605
606 static oop type(oop field);
607 static void set_type(oop field, oop value);
608
609 static int slot(oop reflect);
610 static void set_slot(oop reflect, int value);
611
612 static int modifiers(oop field);
613 static void set_modifiers(oop field, int value);
614
615 static bool has_signature_field();
616 static oop signature(oop constructor);
617 static void set_signature(oop constructor, oop value);
618
619 static bool has_annotations_field();
620 static oop annotations(oop constructor);
621 static void set_annotations(oop constructor, oop value);
622
623 static bool has_parameter_annotations_field();
624 static oop parameter_annotations(oop method);
625 static void set_parameter_annotations(oop method, oop value);
626
627 static bool has_annotation_default_field();
628 static oop annotation_default(oop method);
629 static void set_annotation_default(oop method, oop value);
630
631 // Debugging
632 friend class JavaClasses;
633 };
634
635 // Interface to sun.reflect.ConstantPool objects
636 class sun_reflect_ConstantPool {
637 private:
638 // Note that to reduce dependencies on the JDK we compute these
639 // offsets at run-time.
640 static int _cp_oop_offset;
641
642 static void compute_offsets();
643
644 public:
645 // Allocation
646 static Handle create(TRAPS);
647
648 // Accessors
649 static oop cp_oop(oop reflect);
650 static void set_cp_oop(oop reflect, oop value);
651 static int cp_oop_offset() {
652 return _cp_oop_offset;
653 }
654
655 // Debugging
656 friend class JavaClasses;
657 };
658
659 // Interface to sun.reflect.UnsafeStaticFieldAccessorImpl objects
660 class sun_reflect_UnsafeStaticFieldAccessorImpl {
661 private:
662 static int _base_offset;
663 static void compute_offsets();
664
665 public:
666 static int base_offset() {
667 return _base_offset;
668 }
669
670 // Debugging
671 friend class JavaClasses;
672 };
673
674 // Interface to java.lang primitive type boxing objects:
675 // - java.lang.Boolean
676 // - java.lang.Character
677 // - java.lang.Float
678 // - java.lang.Double
679 // - java.lang.Byte
680 // - java.lang.Short
681 // - java.lang.Integer
682 // - java.lang.Long
683
684 // This could be separated out into 8 individual classes.
685
686 class java_lang_boxing_object: AllStatic {
687 private:
688 enum {
689 hc_value_offset = 0
690 };
691 static int value_offset;
692 static int long_value_offset;
693
694 static oop initialize_and_allocate(BasicType type, TRAPS);
695 public:
696 // Allocation. Returns a boxed value, or NULL for invalid type.
697 static oop create(BasicType type, jvalue* value, TRAPS);
698 // Accessors. Returns the basic type being boxed, or T_ILLEGAL for invalid oop.
699 static BasicType get_value(oop box, jvalue* value);
700 static BasicType set_value(oop box, jvalue* value);
701 static BasicType basic_type(oop box);
702 static bool is_instance(oop box) { return basic_type(box) != T_ILLEGAL; }
703 static bool is_instance(oop box, BasicType type) { return basic_type(box) == type; }
704 static void print(oop box, outputStream* st) { jvalue value; print(get_value(box, &value), &value, st); }
705 static void print(BasicType type, jvalue* value, outputStream* st);
706
707 static int value_offset_in_bytes(BasicType type) {
708 return ( type == T_LONG || type == T_DOUBLE ) ? long_value_offset :
709 value_offset;
710 }
711
712 // Debugging
713 friend class JavaClasses;
714 };
715
716
717
718 // Interface to java.lang.ref.Reference objects
719
720 class java_lang_ref_Reference: AllStatic {
721 public:
722 enum {
723 hc_referent_offset = 0,
724 hc_queue_offset = 1,
725 hc_next_offset = 2,
726 hc_discovered_offset = 3 // Is not last, see SoftRefs.
727 };
728 enum {
729 hc_static_lock_offset = 0,
730 hc_static_pending_offset = 1
731 };
732
733 static int referent_offset;
734 static int queue_offset;
735 static int next_offset;
736 static int discovered_offset;
737 static int static_lock_offset;
738 static int static_pending_offset;
739 static int number_of_fake_oop_fields;
740
741 // Accessors
742 static oop referent(oop ref) {
743 return ref->obj_field(referent_offset);
744 }
745 static void set_referent(oop ref, oop value) {
746 ref->obj_field_put(referent_offset, value);
747 }
748 static void set_referent_raw(oop ref, oop value) {
749 ref->obj_field_raw_put(referent_offset, value);
750 }
751 static HeapWord* referent_addr(oop ref) {
752 return ref->obj_field_addr<HeapWord>(referent_offset);
753 }
754 static oop next(oop ref) {
755 return ref->obj_field(next_offset);
756 }
757 static void set_next(oop ref, oop value) {
758 ref->obj_field_put(next_offset, value);
759 }
760 static void set_next_raw(oop ref, oop value) {
761 ref->obj_field_raw_put(next_offset, value);
762 }
763 static HeapWord* next_addr(oop ref) {
764 return ref->obj_field_addr<HeapWord>(next_offset);
765 }
766 static oop discovered(oop ref) {
767 return ref->obj_field(discovered_offset);
768 }
769 static void set_discovered(oop ref, oop value) {
770 ref->obj_field_put(discovered_offset, value);
771 }
772 static void set_discovered_raw(oop ref, oop value) {
773 ref->obj_field_raw_put(discovered_offset, value);
774 }
775 static HeapWord* discovered_addr(oop ref) {
776 return ref->obj_field_addr<HeapWord>(discovered_offset);
777 }
778 // Accessors for statics
779 static oop pending_list_lock();
780 static oop pending_list();
781
782 static HeapWord* pending_list_addr();
783 };
784
785
786 // Interface to java.lang.ref.SoftReference objects
787
788 class java_lang_ref_SoftReference: public java_lang_ref_Reference {
789 public:
790 enum {
791 // The timestamp is a long field and may need to be adjusted for alignment.
792 hc_timestamp_offset = hc_discovered_offset + 1
793 };
794 enum {
795 hc_static_clock_offset = 0
796 };
797
798 static int timestamp_offset;
799 static int static_clock_offset;
800
801 // Accessors
802 static jlong timestamp(oop ref);
803
804 // Accessors for statics
805 static jlong clock();
806 static void set_clock(jlong value);
807 };
808
809
810 // Interface to java.dyn.MethodHandle objects
811
812 class MethodHandleEntry;
813
814 class java_dyn_MethodHandle: AllStatic {
815 friend class JavaClasses;
816
817 private:
818 static int _vmentry_offset; // assembly code trampoline for MH
819 static int _vmtarget_offset; // class-specific target reference
820 static int _type_offset; // the MethodType of this MH
821 static int _vmslots_offset; // OPTIONAL hoisted type.form.vmslots
822
823 static void compute_offsets();
824
825 public:
826 // Accessors
827 static oop type(oop mh);
828 static void set_type(oop mh, oop mtype);
829
830 static oop vmtarget(oop mh);
831 static void set_vmtarget(oop mh, oop target);
832
833 static MethodHandleEntry* vmentry(oop mh);
834 static void set_vmentry(oop mh, MethodHandleEntry* data);
835
836 static int vmslots(oop mh);
837 static void init_vmslots(oop mh);
838 static int compute_vmslots(oop mh);
839
840 // Testers
841 static bool is_subclass(klassOop klass) {
842 return Klass::cast(klass)->is_subclass_of(SystemDictionary::MethodHandle_klass());
843 }
844 static bool is_instance(oop obj) {
845 return obj != NULL && is_subclass(obj->klass());
846 }
847
848 // Accessors for code generation:
849 static int type_offset_in_bytes() { return _type_offset; }
850 static int vmtarget_offset_in_bytes() { return _vmtarget_offset; }
851 static int vmentry_offset_in_bytes() { return _vmentry_offset; }
852 static int vmslots_offset_in_bytes() { return _vmslots_offset; }
853 };
854
855 class sun_dyn_DirectMethodHandle: public java_dyn_MethodHandle {
856 friend class JavaClasses;
857
858 private:
859 // _vmtarget_offset; // method or class or interface
860 static int _vmindex_offset; // negative or vtable idx or itable idx
861 static void compute_offsets();
862
863 public:
864 // Accessors
865 static int vmindex(oop mh);
866 static void set_vmindex(oop mh, int index);
867
868 // Testers
869 static bool is_subclass(klassOop klass) {
870 return Klass::cast(klass)->is_subclass_of(SystemDictionary::DirectMethodHandle_klass());
871 }
872 static bool is_instance(oop obj) {
873 return obj != NULL && is_subclass(obj->klass());
874 }
875
876 // Accessors for code generation:
877 static int vmindex_offset_in_bytes() { return _vmindex_offset; }
878 };
879
880 class sun_dyn_BoundMethodHandle: public java_dyn_MethodHandle {
881 friend class JavaClasses;
882
883 private:
884 static int _argument_offset; // argument value bound into this MH
885 static int _vmargslot_offset; // relevant argument slot (<= vmslots)
886 static void compute_offsets();
887
888 public:
889 static oop argument(oop mh);
890 static void set_argument(oop mh, oop ref);
891
892 static jint vmargslot(oop mh);
893 static void set_vmargslot(oop mh, jint slot);
894
895 // Testers
896 static bool is_subclass(klassOop klass) {
897 return Klass::cast(klass)->is_subclass_of(SystemDictionary::BoundMethodHandle_klass());
898 }
899 static bool is_instance(oop obj) {
900 return obj != NULL && is_subclass(obj->klass());
901 }
902
903 static int argument_offset_in_bytes() { return _argument_offset; }
904 static int vmargslot_offset_in_bytes() { return _vmargslot_offset; }
905 };
906
907 class sun_dyn_AdapterMethodHandle: public sun_dyn_BoundMethodHandle {
908 friend class JavaClasses;
909
910 private:
911 static int _conversion_offset; // type of conversion to apply
912 static void compute_offsets();
913
914 public:
915 static int conversion(oop mh);
916 static void set_conversion(oop mh, int conv);
917
918 // Testers
919 static bool is_subclass(klassOop klass) {
920 return Klass::cast(klass)->is_subclass_of(SystemDictionary::AdapterMethodHandle_klass());
921 }
922 static bool is_instance(oop obj) {
923 return obj != NULL && is_subclass(obj->klass());
924 }
925
926 // Relevant integer codes (keep these in synch. with MethodHandleNatives.Constants):
927 enum {
928 OP_RETYPE_ONLY = 0x0, // no argument changes; straight retype
929 OP_RETYPE_RAW = 0x1, // straight retype, trusted (void->int, Object->T)
930 OP_CHECK_CAST = 0x2, // ref-to-ref conversion; requires a Class argument
931 OP_PRIM_TO_PRIM = 0x3, // converts from one primitive to another
932 OP_REF_TO_PRIM = 0x4, // unboxes a wrapper to produce a primitive
933 OP_PRIM_TO_REF = 0x5, // boxes a primitive into a wrapper (NYI)
934 OP_SWAP_ARGS = 0x6, // swap arguments (vminfo is 2nd arg)
935 OP_ROT_ARGS = 0x7, // rotate arguments (vminfo is displaced arg)
936 OP_DUP_ARGS = 0x8, // duplicates one or more arguments (at TOS)
937 OP_DROP_ARGS = 0x9, // remove one or more argument slots
938 OP_COLLECT_ARGS = 0xA, // combine one or more arguments into a varargs (NYI)
939 OP_SPREAD_ARGS = 0xB, // expand in place a varargs array (of known size)
940 OP_FLYBY = 0xC, // operate first on reified argument list (NYI)
941 OP_RICOCHET = 0xD, // run an adapter chain on the return value (NYI)
942 CONV_OP_LIMIT = 0xE, // limit of CONV_OP enumeration
943
944 CONV_OP_MASK = 0xF00, // this nybble contains the conversion op field
945 CONV_VMINFO_MASK = 0x0FF, // LSB is reserved for JVM use
946 CONV_VMINFO_SHIFT = 0, // position of bits in CONV_VMINFO_MASK
947 CONV_OP_SHIFT = 8, // position of bits in CONV_OP_MASK
948 CONV_DEST_TYPE_SHIFT = 12, // byte 2 has the adapter BasicType (if needed)
949 CONV_SRC_TYPE_SHIFT = 16, // byte 2 has the source BasicType (if needed)
950 CONV_STACK_MOVE_SHIFT = 20, // high 12 bits give signed SP change
951 CONV_STACK_MOVE_MASK = (1 << (32 - CONV_STACK_MOVE_SHIFT)) - 1
952 };
953
954 static int conversion_offset_in_bytes() { return _conversion_offset; }
955 };
956
957
958 // Interface to sun.dyn.MemberName objects
959 // (These are a private interface for Java code to query the class hierarchy.)
960
961 class sun_dyn_MemberName: AllStatic {
962 friend class JavaClasses;
963
964 private:
965 // From java.dyn.MemberName:
966 // private Class<?> clazz; // class in which the method is defined
967 // private String name; // may be null if not yet materialized
968 // private Object type; // may be null if not yet materialized
969 // private int flags; // modifier bits; see reflect.Modifier
970 // private Object vmtarget; // VM-specific target value
971 // private int vmindex; // method index within class or interface
972 static int _clazz_offset;
973 static int _name_offset;
974 static int _type_offset;
975 static int _flags_offset;
976 static int _vmtarget_offset;
977 static int _vmindex_offset;
978
979 static void compute_offsets();
980
981 public:
982 // Accessors
983 static oop clazz(oop mname);
984 static void set_clazz(oop mname, oop clazz);
985
986 static oop type(oop mname);
987 static void set_type(oop mname, oop type);
988
989 static oop name(oop mname);
990 static void set_name(oop mname, oop name);
991
992 static int flags(oop mname);
993 static void set_flags(oop mname, int flags);
994
995 static int modifiers(oop mname) { return (u2) flags(mname); }
996 static void set_modifiers(oop mname, int mods)
997 { set_flags(mname, (flags(mname) &~ (u2)-1) | (u2)mods); }
998
999 static oop vmtarget(oop mname);
1000 static void set_vmtarget(oop mname, oop target);
1001
1002 static int vmindex(oop mname);
1003 static void set_vmindex(oop mname, int index);
1004
1005 // Testers
1006 static bool is_subclass(klassOop klass) {
1007 return Klass::cast(klass)->is_subclass_of(SystemDictionary::MemberName_klass());
1008 }
1009 static bool is_instance(oop obj) {
1010 return obj != NULL && is_subclass(obj->klass());
1011 }
1012
1013 // Relevant integer codes (keep these in synch. with MethodHandleNatives.Constants):
1014 enum {
1015 MN_IS_METHOD = 0x00010000, // method (not constructor)
1016 MN_IS_CONSTRUCTOR = 0x00020000, // constructor
1017 MN_IS_FIELD = 0x00040000, // field
1018 MN_IS_TYPE = 0x00080000, // nested type
1019 MN_SEARCH_SUPERCLASSES = 0x00100000, // for MHN.getMembers
1020 MN_SEARCH_INTERFACES = 0x00200000, // for MHN.getMembers
1021 VM_INDEX_UNINITIALIZED = -99
1022 };
1023
1024 // Accessors for code generation:
1025 static int clazz_offset_in_bytes() { return _clazz_offset; }
1026 static int type_offset_in_bytes() { return _type_offset; }
1027 static int name_offset_in_bytes() { return _name_offset; }
1028 static int flags_offset_in_bytes() { return _flags_offset; }
1029 static int vmtarget_offset_in_bytes() { return _vmtarget_offset; }
1030 static int vmindex_offset_in_bytes() { return _vmindex_offset; }
1031 };
1032
1033
1034 // Interface to java.dyn.MethodType objects
1035
1036 class java_dyn_MethodType: AllStatic {
1037 friend class JavaClasses;
1038
1039 private:
1040 static int _rtype_offset;
1041 static int _ptypes_offset;
1042 static int _form_offset;
1043
1044 static void compute_offsets();
1045
1046 public:
1047 // Accessors
1048 static oop rtype(oop mt);
1049 static objArrayOop ptypes(oop mt);
1050 static oop form(oop mt);
1051
1052 static oop ptype(oop mt, int index);
1053 static int ptype_count(oop mt);
1054
1055 static Symbol* as_signature(oop mt, bool intern_if_not_found, TRAPS);
1056 static void print_signature(oop mt, outputStream* st);
1057
1058 static bool is_instance(oop obj) {
1059 return obj != NULL && obj->klass() == SystemDictionary::MethodType_klass();
1060 }
1061
1062 // Accessors for code generation:
1063 static int rtype_offset_in_bytes() { return _rtype_offset; }
1064 static int ptypes_offset_in_bytes() { return _ptypes_offset; }
1065 static int form_offset_in_bytes() { return _form_offset; }
1066 };
1067
1068 class java_dyn_MethodTypeForm: AllStatic {
1069 friend class JavaClasses;
1070
1071 private:
1072 static int _vmslots_offset; // number of argument slots needed
1073 static int _erasedType_offset; // erasedType = canonical MethodType
1074 static int _genericInvoker_offset; // genericInvoker = adapter for invokeGeneric
1075
1076 static void compute_offsets();
1077
1078 public:
1079 // Accessors
1080 static int vmslots(oop mtform);
1081 static oop erasedType(oop mtform);
1082 static oop genericInvoker(oop mtform);
1083
1084 // Accessors for code generation:
1085 static int vmslots_offset_in_bytes() { return _vmslots_offset; }
1086 static int erasedType_offset_in_bytes() { return _erasedType_offset; }
1087 static int genericInvoker_offset_in_bytes() { return _genericInvoker_offset; }
1088 };
1089
1090
1091 // Interface to java.dyn.CallSite objects
1092
1093 class java_dyn_CallSite: AllStatic {
1094 friend class JavaClasses;
1095
1096 private:
1097 static int _target_offset;
1098 static int _caller_method_offset;
1099 static int _caller_bci_offset;
1100
1101 static void compute_offsets();
1102
1103 public:
1104 // Accessors
1105 static oop target(oop site);
1106 static void set_target(oop site, oop target);
1107
1108 static oop caller_method(oop site);
1109 static void set_caller_method(oop site, oop ref);
1110
1111 static jint caller_bci(oop site);
1112 static void set_caller_bci(oop site, jint bci);
1113
1114 // Testers
1115 static bool is_subclass(klassOop klass) {
1116 return Klass::cast(klass)->is_subclass_of(SystemDictionary::CallSite_klass());
1117 }
1118 static bool is_instance(oop obj) {
1119 return obj != NULL && is_subclass(obj->klass());
1120 }
1121
1122 // Accessors for code generation:
1123 static int target_offset_in_bytes() { return _target_offset; }
1124 static int caller_method_offset_in_bytes() { return _caller_method_offset; }
1125 static int caller_bci_offset_in_bytes() { return _caller_bci_offset; }
1126 };
1127
1128
1129 // Interface to java.security.AccessControlContext objects
1130
1131 class java_security_AccessControlContext: AllStatic {
1132 private:
1133 // Note that for this class the layout changed between JDK1.2 and JDK1.3,
1134 // so we compute the offsets at startup rather than hard-wiring them.
1135 static int _context_offset;
1136 static int _privilegedContext_offset;
1137 static int _isPrivileged_offset;
1138
1139 static void compute_offsets();
1140 public:
1141 static oop create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS);
1142
1143 // Debugging/initialization
1144 friend class JavaClasses;
1145 };
1146
1147
1148 // Interface to java.lang.ClassLoader objects
1149
1150 class java_lang_ClassLoader : AllStatic {
1151 private:
1152 enum {
1153 hc_parent_offset = 0
1154 };
1155
1156 static int parent_offset;
1157
1158 public:
1159 static oop parent(oop loader);
1160
1161 static bool is_trusted_loader(oop loader);
1162
1163 // Fix for 4474172
1164 static oop non_reflection_class_loader(oop loader);
1165
1166 // Debugging
1167 friend class JavaClasses;
1168 };
1169
1170
1171 // Interface to java.lang.System objects
1172
1173 class java_lang_System : AllStatic {
1174 private:
1175 enum {
1176 hc_static_in_offset = 0,
1177 hc_static_out_offset = 1,
1178 hc_static_err_offset = 2
1179 };
1180
1181 static int static_in_offset;
1182 static int static_out_offset;
1183 static int static_err_offset;
1184
1185 public:
1186 static int in_offset_in_bytes();
1187 static int out_offset_in_bytes();
1188 static int err_offset_in_bytes();
1189
1190 // Debugging
1191 friend class JavaClasses;
1192 };
1193
1194
1195 // Interface to java.lang.StackTraceElement objects
1196
1197 class java_lang_StackTraceElement: AllStatic {
1198 private:
1199 enum {
1200 hc_declaringClass_offset = 0,
1201 hc_methodName_offset = 1,
1202 hc_fileName_offset = 2,
1203 hc_lineNumber_offset = 3
1204 };
1205
1206 static int declaringClass_offset;
1207 static int methodName_offset;
1208 static int fileName_offset;
1209 static int lineNumber_offset;
1210
1211 public:
1212 // Setters
1213 static void set_declaringClass(oop element, oop value);
1214 static void set_methodName(oop element, oop value);
1215 static void set_fileName(oop element, oop value);
1216 static void set_lineNumber(oop element, int value);
1217
1218 // Create an instance of StackTraceElement
1219 static oop create(methodHandle m, int bci, TRAPS);
1220
1221 // Debugging
1222 friend class JavaClasses;
1223 };
1224
1225
1226 // Interface to java.lang.AssertionStatusDirectives objects
1227
1228 class java_lang_AssertionStatusDirectives: AllStatic {
1229 private:
1230 enum {
1231 hc_classes_offset,
1232 hc_classEnabled_offset,
1233 hc_packages_offset,
1234 hc_packageEnabled_offset,
1235 hc_deflt_offset
1236 };
1237
1238 static int classes_offset;
1239 static int classEnabled_offset;
1240 static int packages_offset;
1241 static int packageEnabled_offset;
1242 static int deflt_offset;
1243
1244 public:
1245 // Setters
1246 static void set_classes(oop obj, oop val);
1247 static void set_classEnabled(oop obj, oop val);
1248 static void set_packages(oop obj, oop val);
1249 static void set_packageEnabled(oop obj, oop val);
1250 static void set_deflt(oop obj, bool val);
1251 // Debugging
1252 friend class JavaClasses;
1253 };
1254
1255
1256 class java_nio_Buffer: AllStatic {
1257 private:
1258 static int _limit_offset;
1259
1260 public:
1261 static int limit_offset();
1262 static void compute_offsets();
1263 };
1264
1265 class sun_misc_AtomicLongCSImpl: AllStatic {
1266 private:
1267 static int _value_offset;
1268
1269 public:
1270 static int value_offset();
1271 static void compute_offsets();
1272 };
1273
1274 class java_util_concurrent_locks_AbstractOwnableSynchronizer : AllStatic {
1275 private:
1276 static int _owner_offset;
1277 public:
1278 static void initialize(TRAPS);
1279 static oop get_owner_threadObj(oop obj);
1280 };
1281
1282 // Interface to hard-coded offset checking
1283
1284 class JavaClasses : AllStatic {
1285 private:
1286 static bool check_offset(const char *klass_name, int offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1287 static bool check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1288 static bool check_constant(const char *klass_name, int constant, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1289 public:
1290 static void compute_hard_coded_offsets();
1291 static void compute_offsets();
1292 static void check_offsets() PRODUCT_RETURN;
1293 };
1294
1295 #endif // SHARE_VM_CLASSFILE_JAVACLASSES_HPP