1 /*
2 * Copyright (c) 1997, 2014, 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 static int value_offset;
56 static int offset_offset;
57 static int count_offset;
58 static int hash_offset;
59
60 static bool initialized;
61
62 static Handle basic_create(int length, bool tenured, TRAPS);
63 static Handle basic_create_from_unicode(jchar* unicode, int length, bool tenured, TRAPS);
64
65 static void set_value( oop string, typeArrayOop buffer) {
66 assert(initialized, "Must be initialized");
67 string->obj_field_put(value_offset, (oop)buffer);
68 }
69 static void set_offset(oop string, int offset) {
70 assert(initialized, "Must be initialized");
71 if (offset_offset > 0) {
72 string->int_field_put(offset_offset, offset);
73 }
74 }
75 static void set_count( oop string, int count) {
76 assert(initialized, "Must be initialized");
77 if (count_offset > 0) {
78 string->int_field_put(count_offset, count);
79 }
80 }
81
82 public:
83 static void compute_offsets();
84
85 // Instance creation
86 static Handle create_from_unicode(jchar* unicode, int len, TRAPS);
87 static Handle create_tenured_from_unicode(jchar* unicode, int len, TRAPS);
88 static oop create_oop_from_unicode(jchar* unicode, int len, TRAPS);
89 static Handle create_from_str(const char* utf8_str, TRAPS);
90 static oop create_oop_from_str(const char* utf8_str, TRAPS);
91 static Handle create_from_symbol(Symbol* symbol, TRAPS);
92 static Handle create_from_platform_dependent_str(const char* str, TRAPS);
93 static Handle char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS);
94
95 static bool has_offset_field() {
96 assert(initialized, "Must be initialized");
97 return (offset_offset > 0);
98 }
99
100 static bool has_count_field() {
101 assert(initialized, "Must be initialized");
102 return (count_offset > 0);
103 }
104
105 static bool has_hash_field() {
106 assert(initialized, "Must be initialized");
107 return (hash_offset > 0);
108 }
109
110 static int value_offset_in_bytes() {
111 assert(initialized && (value_offset > 0), "Must be initialized");
112 return value_offset;
113 }
114 static int count_offset_in_bytes() {
115 assert(initialized && (count_offset > 0), "Must be initialized");
116 return count_offset;
117 }
118 static int offset_offset_in_bytes() {
119 assert(initialized && (offset_offset > 0), "Must be initialized");
120 return offset_offset;
121 }
122 static int hash_offset_in_bytes() {
123 assert(initialized && (hash_offset > 0), "Must be initialized");
124 return hash_offset;
125 }
126
127 // Accessors
128 static typeArrayOop value(oop java_string) {
129 assert(initialized && (value_offset > 0), "Must be initialized");
130 assert(is_instance(java_string), "must be java_string");
131 return (typeArrayOop) java_string->obj_field(value_offset);
132 }
133 static int offset(oop java_string) {
134 assert(initialized, "Must be initialized");
135 assert(is_instance(java_string), "must be java_string");
136 if (offset_offset > 0) {
137 return java_string->int_field(offset_offset);
138 } else {
139 return 0;
140 }
141 }
142 static int length(oop java_string) {
143 assert(initialized, "Must be initialized");
144 assert(is_instance(java_string), "must be java_string");
145 if (count_offset > 0) {
146 return java_string->int_field(count_offset);
147 } else {
148 return ((typeArrayOop)java_string->obj_field(value_offset))->length();
149 }
150 }
151 static int utf8_length(oop java_string);
152
153 // String converters
154 static char* as_utf8_string(oop java_string);
155 static char* as_utf8_string(oop java_string, char* buf, int buflen);
156 static char* as_utf8_string(oop java_string, int start, int len);
157 static char* as_platform_dependent_str(Handle java_string, TRAPS);
158 static jchar* as_unicode_string(oop java_string, int& length);
159
160 // Compute the hash value for a java.lang.String object which would
161 // contain the characters passed in.
162 //
163 // As the hash value used by the String object itself, in
164 // String.hashCode(). This value is normally calculated in Java code
165 // in the String.hashCode method(), but is precomputed for String
166 // objects in the shared archive file.
167 // hash P(31) from Kernighan & Ritchie
168 //
169 // For this reason, THIS ALGORITHM MUST MATCH String.toHash().
170 template <typename T> static unsigned int to_hash(T* s, int len) {
171 unsigned int h = 0;
172 while (len-- > 0) {
173 h = 31*h + (unsigned int) *s;
174 s++;
175 }
176 return h;
177 }
178 static unsigned int to_hash(oop java_string);
179
180 // This is the string hash code used by the StringTable, which may be
181 // the same as String.toHash or an alternate hash code.
182 static unsigned int hash_string(oop java_string);
183
184 static bool equals(oop java_string, jchar* chars, int len);
185
186 // Conversion between '.' and '/' formats
187 static Handle externalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '/', '.', THREAD); }
188 static Handle internalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '.', '/', THREAD); }
189
190 // Conversion
191 static Symbol* as_symbol(Handle java_string, TRAPS);
192 static Symbol* as_symbol_or_null(oop java_string);
193
194 // Testers
195 static bool is_instance(oop obj) {
196 return obj != NULL && obj->klass() == SystemDictionary::String_klass();
197 }
198
199 // Debugging
200 static void print(Handle java_string, outputStream* st);
201 friend class JavaClasses;
202 };
203
204
205 // Interface to java.lang.Class objects
206
207 #define CLASS_INJECTED_FIELDS(macro) \
208 macro(java_lang_Class, klass, object_signature, false) \
209 macro(java_lang_Class, resolved_constructor, object_signature, false) \
210 macro(java_lang_Class, array_klass, object_signature, false) \
211 macro(java_lang_Class, oop_size, int_signature, false) \
212 macro(java_lang_Class, static_oop_field_count, int_signature, false)
213
214 class java_lang_Class : AllStatic {
215 friend class VMStructs;
216
217 private:
218 // The fake offsets are added by the class loader when java.lang.Class is loaded
219
220 static int _klass_offset;
221 static int _resolved_constructor_offset;
222 static int _array_klass_offset;
223
224 static int _oop_size_offset;
225 static int _static_oop_field_count_offset;
226
227 static int _class_loader_offset;
228
229 static bool offsets_computed;
230 static int classRedefinedCount_offset;
231
232 static void set_class_loader(oop java_class, oop class_loader);
233 public:
234 static void compute_offsets();
235
236 // Instance creation
237 static oop create_mirror(KlassHandle k, Handle class_loader, TRAPS);
238 static oop create_mirror(KlassHandle k, TRAPS) {
239 return create_mirror(k, Handle(), THREAD);
240 }
241
242 static void fixup_mirror(KlassHandle k, TRAPS);
243 static oop create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS);
244 // Conversion
245 static klassOop as_klassOop(oop java_class);
246 static void set_klass(oop java_class, klassOop klass);
247 static BasicType as_BasicType(oop java_class, klassOop* reference_klass = NULL);
248 static BasicType as_BasicType(oop java_class, KlassHandle* reference_klass) {
249 klassOop refk_oop = NULL;
250 BasicType result = as_BasicType(java_class, &refk_oop);
251 (*reference_klass) = KlassHandle(refk_oop);
252 return result;
253 }
254 static Symbol* as_signature(oop java_class, bool intern_if_not_found, TRAPS);
255 static void print_signature(oop java_class, outputStream *st);
256 // Testing
257 static bool is_instance(oop obj) {
258 return obj != NULL && obj->klass() == SystemDictionary::Class_klass();
259 }
260 static bool is_primitive(oop java_class);
261 static BasicType primitive_type(oop java_class);
262 static oop primitive_mirror(BasicType t);
263 // JVM_NewInstance support
264 static methodOop resolved_constructor(oop java_class);
265 static void set_resolved_constructor(oop java_class, methodOop constructor);
266 // JVM_NewArray support
267 static klassOop array_klass(oop java_class);
268 static void set_array_klass(oop java_class, klassOop klass);
269 // compiler support for class operations
270 static int klass_offset_in_bytes() { return _klass_offset; }
271 static int resolved_constructor_offset_in_bytes() { return _resolved_constructor_offset; }
272 static int array_klass_offset_in_bytes() { return _array_klass_offset; }
273 // Support for classRedefinedCount field
274 static int classRedefinedCount(oop the_class_mirror);
275 static void set_classRedefinedCount(oop the_class_mirror, int value);
276
277 static oop class_loader(oop java_class);
278
279 static int oop_size(oop java_class);
280 static void set_oop_size(oop java_class, int size);
281 static int static_oop_field_count(oop java_class);
282 static void set_static_oop_field_count(oop java_class, int size);
283
284 // Debugging
285 friend class JavaClasses;
286 friend class instanceKlass; // verification code accesses offsets
287 friend class ClassFileParser; // access to number_of_fake_fields
288 };
289
290 // Interface to java.lang.Thread objects
291
292 class java_lang_Thread : AllStatic {
293 private:
294 // Note that for this class the layout changed between JDK1.2 and JDK1.3,
295 // so we compute the offsets at startup rather than hard-wiring them.
296 static int _name_offset;
297 static int _group_offset;
298 static int _contextClassLoader_offset;
299 static int _inheritedAccessControlContext_offset;
300 static int _priority_offset;
301 static int _eetop_offset;
302 static int _daemon_offset;
303 static int _stillborn_offset;
304 static int _stackSize_offset;
305 static int _tid_offset;
306 static int _thread_status_offset;
307 static int _park_blocker_offset;
308 static int _park_event_offset ;
309
310 static void compute_offsets();
311
312 public:
313 // Instance creation
314 static oop create();
315 // Returns the JavaThread associated with the thread obj
316 static JavaThread* thread(oop java_thread);
317 // Set JavaThread for instance
318 static void set_thread(oop java_thread, JavaThread* thread);
319 // Name
320 static typeArrayOop name(oop java_thread);
321 static void set_name(oop java_thread, typeArrayOop name);
322 // Priority
323 static ThreadPriority priority(oop java_thread);
324 static void set_priority(oop java_thread, ThreadPriority priority);
325 // Thread group
326 static oop threadGroup(oop java_thread);
327 // Stillborn
328 static bool is_stillborn(oop java_thread);
329 static void set_stillborn(oop java_thread);
330 // Alive (NOTE: this is not really a field, but provides the correct
331 // definition without doing a Java call)
332 static bool is_alive(oop java_thread);
333 // Daemon
334 static bool is_daemon(oop java_thread);
335 static void set_daemon(oop java_thread);
336 // Context ClassLoader
337 static oop context_class_loader(oop java_thread);
338 // Control context
339 static oop inherited_access_control_context(oop java_thread);
340 // Stack size hint
341 static jlong stackSize(oop java_thread);
342 // Thread ID
343 static jlong thread_id(oop java_thread);
344
345 // Blocker object responsible for thread parking
346 static oop park_blocker(oop java_thread);
347
348 // Pointer to type-stable park handler, encoded as jlong.
349 // Should be set when apparently null
350 // For details, see unsafe.cpp Unsafe_Unpark
351 static jlong park_event(oop java_thread);
352 static bool set_park_event(oop java_thread, jlong ptr);
353
354 // Java Thread Status for JVMTI and M&M use.
355 // This thread status info is saved in threadStatus field of
356 // java.lang.Thread java class.
357 enum ThreadStatus {
358 NEW = 0,
359 RUNNABLE = JVMTI_THREAD_STATE_ALIVE + // runnable / running
360 JVMTI_THREAD_STATE_RUNNABLE,
361 SLEEPING = JVMTI_THREAD_STATE_ALIVE + // Thread.sleep()
362 JVMTI_THREAD_STATE_WAITING +
363 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
364 JVMTI_THREAD_STATE_SLEEPING,
365 IN_OBJECT_WAIT = JVMTI_THREAD_STATE_ALIVE + // Object.wait()
366 JVMTI_THREAD_STATE_WAITING +
367 JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
368 JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
369 IN_OBJECT_WAIT_TIMED = JVMTI_THREAD_STATE_ALIVE + // Object.wait(long)
370 JVMTI_THREAD_STATE_WAITING +
371 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
372 JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
373 PARKED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park()
374 JVMTI_THREAD_STATE_WAITING +
375 JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
376 JVMTI_THREAD_STATE_PARKED,
377 PARKED_TIMED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park(long)
378 JVMTI_THREAD_STATE_WAITING +
379 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
380 JVMTI_THREAD_STATE_PARKED,
381 BLOCKED_ON_MONITOR_ENTER = JVMTI_THREAD_STATE_ALIVE + // (re-)entering a synchronization block
382 JVMTI_THREAD_STATE_BLOCKED_ON_MONITOR_ENTER,
383 TERMINATED = JVMTI_THREAD_STATE_TERMINATED
384 };
385 // Write thread status info to threadStatus field of java.lang.Thread.
386 static void set_thread_status(oop java_thread_oop, ThreadStatus status);
387 // Read thread status info from threadStatus field of java.lang.Thread.
388 static ThreadStatus get_thread_status(oop java_thread_oop);
389
390 static const char* thread_status_name(oop java_thread_oop);
391
392 // Debugging
393 friend class JavaClasses;
394 };
395
396 // Interface to java.lang.ThreadGroup objects
397
398 class java_lang_ThreadGroup : AllStatic {
399 private:
400 static int _parent_offset;
401 static int _name_offset;
402 static int _threads_offset;
403 static int _groups_offset;
404 static int _maxPriority_offset;
405 static int _destroyed_offset;
406 static int _daemon_offset;
407 static int _vmAllowSuspension_offset;
408 static int _nthreads_offset;
409 static int _ngroups_offset;
410
411 static void compute_offsets();
412
413 public:
414 // parent ThreadGroup
415 static oop parent(oop java_thread_group);
416 // name
417 static typeArrayOop name(oop java_thread_group);
418 // ("name as oop" accessor is not necessary)
419 // Number of threads in group
420 static int nthreads(oop java_thread_group);
421 // threads
422 static objArrayOop threads(oop java_thread_group);
423 // Number of threads in group
424 static int ngroups(oop java_thread_group);
425 // groups
426 static objArrayOop groups(oop java_thread_group);
427 // maxPriority in group
428 static ThreadPriority maxPriority(oop java_thread_group);
429 // Destroyed
430 static bool is_destroyed(oop java_thread_group);
431 // Daemon
432 static bool is_daemon(oop java_thread_group);
433 // vmAllowSuspension
434 static bool is_vmAllowSuspension(oop java_thread_group);
435 // Debugging
436 friend class JavaClasses;
437 };
438
439
440
441 // Interface to java.lang.Throwable objects
442
443 class java_lang_Throwable: AllStatic {
444 friend class BacktraceBuilder;
445
446 private:
447 // Offsets
448 enum {
449 hc_backtrace_offset = 0,
450 hc_detailMessage_offset = 1,
451 hc_cause_offset = 2, // New since 1.4
452 hc_stackTrace_offset = 3 // New since 1.4
453 };
454 enum {
455 hc_static_unassigned_stacktrace_offset = 0 // New since 1.7
456 };
457 // Trace constants
458 enum {
459 trace_methods_offset = 0,
460 trace_bcis_offset = 1,
461 trace_next_offset = 2,
462 trace_size = 3,
463 trace_chunk_size = 32
464 };
465
466 static int backtrace_offset;
467 static int detailMessage_offset;
468 static int cause_offset;
469 static int stackTrace_offset;
470 static int static_unassigned_stacktrace_offset;
471
472 // Printing
473 static char* print_stack_element_to_buffer(methodOop method, int bci);
474 static void print_to_stream(Handle stream, const char* str);
475 // StackTrace (programmatic access, new since 1.4)
476 static void clear_stacktrace(oop throwable);
477 // No stack trace available
478 static const char* no_stack_trace_message();
479 // Stacktrace (post JDK 1.7.0 to allow immutability protocol to be followed)
480 static void set_stacktrace(oop throwable, oop st_element_array);
481 static oop unassigned_stacktrace();
482
483 public:
484 // Backtrace
485 static oop backtrace(oop throwable);
486 static void set_backtrace(oop throwable, oop value);
487 // Needed by JVMTI to filter out this internal field.
488 static int get_backtrace_offset() { return backtrace_offset;}
489 static int get_detailMessage_offset() { return detailMessage_offset;}
490 // Message
491 static oop message(oop throwable);
492 static oop message(Handle throwable);
493 static void set_message(oop throwable, oop value);
494 // Print stack trace stored in exception by call-back to Java
495 // Note: this is no longer used in Merlin, but we still suppport
496 // it for compatibility.
497 static void print_stack_trace(oop throwable, oop print_stream);
498 static void print_stack_element(Handle stream, methodOop method, int bci);
499 static void print_stack_element(outputStream *st, methodOop method, int bci);
500 static void print_stack_usage(Handle stream);
501
502 // Allocate space for backtrace (created but stack trace not filled in)
503 static void allocate_backtrace(Handle throwable, TRAPS);
504 // Fill in current stack trace for throwable with preallocated backtrace (no GC)
505 static void fill_in_stack_trace_of_preallocated_backtrace(Handle throwable);
506 // Fill in current stack trace, can cause GC
507 static void fill_in_stack_trace(Handle throwable, methodHandle method, TRAPS);
508 static void fill_in_stack_trace(Handle throwable, methodHandle method = methodHandle());
509 // Programmatic access to stack trace
510 static oop get_stack_trace_element(oop throwable, int index, TRAPS);
511 static int get_stack_trace_depth(oop throwable, TRAPS);
512 // Printing
513 static void print(oop throwable, outputStream* st);
514 static void print(Handle throwable, outputStream* st);
515 static void print_stack_trace(oop throwable, outputStream* st);
516 // Debugging
517 friend class JavaClasses;
518 };
519
520
521 // Interface to java.lang.reflect.AccessibleObject objects
522
523 class java_lang_reflect_AccessibleObject: AllStatic {
524 private:
525 // Note that to reduce dependencies on the JDK we compute these
526 // offsets at run-time.
527 static int override_offset;
528
529 static void compute_offsets();
530
531 public:
532 // Accessors
533 static jboolean override(oop reflect);
534 static void set_override(oop reflect, jboolean value);
535
536 // Debugging
537 friend class JavaClasses;
538 };
539
540
541 // Interface to java.lang.reflect.Method objects
542
543 class java_lang_reflect_Method : public java_lang_reflect_AccessibleObject {
544 private:
545 // Note that to reduce dependencies on the JDK we compute these
546 // offsets at run-time.
547 static int clazz_offset;
548 static int name_offset;
549 static int returnType_offset;
550 static int parameterTypes_offset;
551 static int exceptionTypes_offset;
552 static int slot_offset;
553 static int modifiers_offset;
554 static int signature_offset;
555 static int annotations_offset;
556 static int parameter_annotations_offset;
557 static int annotation_default_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 name(oop method);
570 static void set_name(oop method, oop value);
571
572 static oop return_type(oop method);
573 static void set_return_type(oop method, oop value);
574
575 static oop parameter_types(oop method);
576 static void set_parameter_types(oop method, oop value);
577
578 static oop exception_types(oop method);
579 static void set_exception_types(oop method, oop value);
580
581 static int slot(oop reflect);
582 static void set_slot(oop reflect, int value);
583
584 static int modifiers(oop method);
585 static void set_modifiers(oop method, int value);
586
587 static bool has_signature_field();
588 static oop signature(oop method);
589 static void set_signature(oop method, oop value);
590
591 static bool has_annotations_field();
592 static oop annotations(oop method);
593 static void set_annotations(oop method, oop value);
594
595 static bool has_parameter_annotations_field();
596 static oop parameter_annotations(oop method);
597 static void set_parameter_annotations(oop method, oop value);
598
599 static bool has_annotation_default_field();
600 static oop annotation_default(oop method);
601 static void set_annotation_default(oop method, oop value);
602
603 // Debugging
604 friend class JavaClasses;
605 };
606
607
608 // Interface to java.lang.reflect.Constructor objects
609
610 class java_lang_reflect_Constructor : public java_lang_reflect_AccessibleObject {
611 private:
612 // Note that to reduce dependencies on the JDK we compute these
613 // offsets at run-time.
614 static int clazz_offset;
615 static int parameterTypes_offset;
616 static int exceptionTypes_offset;
617 static int slot_offset;
618 static int modifiers_offset;
619 static int signature_offset;
620 static int annotations_offset;
621 static int parameter_annotations_offset;
622
623 static void compute_offsets();
624
625 public:
626 // Allocation
627 static Handle create(TRAPS);
628
629 // Accessors
630 static oop clazz(oop reflect);
631 static void set_clazz(oop reflect, oop value);
632
633 static oop parameter_types(oop constructor);
634 static void set_parameter_types(oop constructor, oop value);
635
636 static oop exception_types(oop constructor);
637 static void set_exception_types(oop constructor, oop value);
638
639 static int slot(oop reflect);
640 static void set_slot(oop reflect, int value);
641
642 static int modifiers(oop constructor);
643 static void set_modifiers(oop constructor, int value);
644
645 static bool has_signature_field();
646 static oop signature(oop constructor);
647 static void set_signature(oop constructor, oop value);
648
649 static bool has_annotations_field();
650 static oop annotations(oop constructor);
651 static void set_annotations(oop constructor, oop value);
652
653 static bool has_parameter_annotations_field();
654 static oop parameter_annotations(oop method);
655 static void set_parameter_annotations(oop method, oop value);
656
657 // Debugging
658 friend class JavaClasses;
659 };
660
661
662 // Interface to java.lang.reflect.Field objects
663
664 class java_lang_reflect_Field : public java_lang_reflect_AccessibleObject {
665 private:
666 // Note that to reduce dependencies on the JDK we compute these
667 // offsets at run-time.
668 static int clazz_offset;
669 static int name_offset;
670 static int type_offset;
671 static int slot_offset;
672 static int modifiers_offset;
673 static int signature_offset;
674 static int annotations_offset;
675
676 static void compute_offsets();
677
678 public:
679 // Allocation
680 static Handle create(TRAPS);
681
682 // Accessors
683 static oop clazz(oop reflect);
684 static void set_clazz(oop reflect, oop value);
685
686 static oop name(oop field);
687 static void set_name(oop field, oop value);
688
689 static oop type(oop field);
690 static void set_type(oop field, oop value);
691
692 static int slot(oop reflect);
693 static void set_slot(oop reflect, int value);
694
695 static int modifiers(oop field);
696 static void set_modifiers(oop field, int value);
697
698 static bool has_signature_field();
699 static oop signature(oop constructor);
700 static void set_signature(oop constructor, oop value);
701
702 static bool has_annotations_field();
703 static oop annotations(oop constructor);
704 static void set_annotations(oop constructor, oop value);
705
706 static bool has_parameter_annotations_field();
707 static oop parameter_annotations(oop method);
708 static void set_parameter_annotations(oop method, oop value);
709
710 static bool has_annotation_default_field();
711 static oop annotation_default(oop method);
712 static void set_annotation_default(oop method, oop value);
713
714 // Debugging
715 friend class JavaClasses;
716 };
717
718 // Interface to sun.reflect.ConstantPool objects
719 class sun_reflect_ConstantPool {
720 private:
721 // Note that to reduce dependencies on the JDK we compute these
722 // offsets at run-time.
723 static int _cp_oop_offset;
724
725 static void compute_offsets();
726
727 public:
728 // Allocation
729 static Handle create(TRAPS);
730
731 // Accessors
732 static oop cp_oop(oop reflect);
733 static void set_cp_oop(oop reflect, oop value);
734 static int cp_oop_offset() {
735 return _cp_oop_offset;
736 }
737
738 // Debugging
739 friend class JavaClasses;
740 };
741
742 // Interface to sun.reflect.UnsafeStaticFieldAccessorImpl objects
743 class sun_reflect_UnsafeStaticFieldAccessorImpl {
744 private:
745 static int _base_offset;
746 static void compute_offsets();
747
748 public:
749 static int base_offset() {
750 return _base_offset;
751 }
752
753 // Debugging
754 friend class JavaClasses;
755 };
756
757 // Interface to java.lang primitive type boxing objects:
758 // - java.lang.Boolean
759 // - java.lang.Character
760 // - java.lang.Float
761 // - java.lang.Double
762 // - java.lang.Byte
763 // - java.lang.Short
764 // - java.lang.Integer
765 // - java.lang.Long
766
767 // This could be separated out into 8 individual classes.
768
769 class java_lang_boxing_object: AllStatic {
770 private:
771 enum {
772 hc_value_offset = 0
773 };
774 static int value_offset;
775 static int long_value_offset;
776
777 static oop initialize_and_allocate(BasicType type, TRAPS);
778 public:
779 // Allocation. Returns a boxed value, or NULL for invalid type.
780 static oop create(BasicType type, jvalue* value, TRAPS);
781 // Accessors. Returns the basic type being boxed, or T_ILLEGAL for invalid oop.
782 static BasicType get_value(oop box, jvalue* value);
783 static BasicType set_value(oop box, jvalue* value);
784 static BasicType basic_type(oop box);
785 static bool is_instance(oop box) { return basic_type(box) != T_ILLEGAL; }
786 static bool is_instance(oop box, BasicType type) { return basic_type(box) == type; }
787 static void print(oop box, outputStream* st) { jvalue value; print(get_value(box, &value), &value, st); }
788 static void print(BasicType type, jvalue* value, outputStream* st);
789
790 static int value_offset_in_bytes(BasicType type) {
791 return ( type == T_LONG || type == T_DOUBLE ) ? long_value_offset :
792 value_offset;
793 }
794
795 // Debugging
796 friend class JavaClasses;
797 };
798
799
800
801 // Interface to java.lang.ref.Reference objects
802
803 class java_lang_ref_Reference: AllStatic {
804 public:
805 enum {
806 hc_referent_offset = 0,
807 hc_queue_offset = 1,
808 hc_next_offset = 2,
809 hc_discovered_offset = 3 // Is not last, see SoftRefs.
810 };
811 enum {
812 hc_static_lock_offset = 0,
813 hc_static_pending_offset = 1
814 };
815
816 static int referent_offset;
817 static int queue_offset;
818 static int next_offset;
819 static int discovered_offset;
820 static int static_lock_offset;
821 static int static_pending_offset;
822 static int number_of_fake_oop_fields;
823
824 // Accessors
825 static oop referent(oop ref) {
826 return ref->obj_field(referent_offset);
827 }
828 static void set_referent(oop ref, oop value) {
829 ref->obj_field_put(referent_offset, value);
830 }
831 static void set_referent_raw(oop ref, oop value) {
832 ref->obj_field_put_raw(referent_offset, value);
833 }
834 static HeapWord* referent_addr(oop ref) {
835 return ref->obj_field_addr<HeapWord>(referent_offset);
836 }
837 static oop next(oop ref) {
838 return ref->obj_field(next_offset);
839 }
840 static void set_next(oop ref, oop value) {
841 ref->obj_field_put(next_offset, value);
842 }
843 static void set_next_raw(oop ref, oop value) {
844 ref->obj_field_put_raw(next_offset, value);
845 }
846 static HeapWord* next_addr(oop ref) {
847 return ref->obj_field_addr<HeapWord>(next_offset);
848 }
849 static oop discovered(oop ref) {
850 return ref->obj_field(discovered_offset);
851 }
852 static void set_discovered(oop ref, oop value) {
853 ref->obj_field_put(discovered_offset, value);
854 }
855 static void set_discovered_raw(oop ref, oop value) {
856 ref->obj_field_put_raw(discovered_offset, value);
857 }
858 static HeapWord* discovered_addr(oop ref) {
859 return ref->obj_field_addr<HeapWord>(discovered_offset);
860 }
861 // Accessors for statics
862 static oop pending_list_lock();
863 static oop pending_list();
864
865 static HeapWord* pending_list_addr();
866 };
867
868
869 // Interface to java.lang.ref.SoftReference objects
870
871 class java_lang_ref_SoftReference: public java_lang_ref_Reference {
872 public:
873 enum {
874 // The timestamp is a long field and may need to be adjusted for alignment.
875 hc_timestamp_offset = hc_discovered_offset + 1
876 };
877 enum {
878 hc_static_clock_offset = 0
879 };
880
881 static int timestamp_offset;
882 static int static_clock_offset;
883
884 // Accessors
885 static jlong timestamp(oop ref);
886
887 // Accessors for statics
888 static jlong clock();
889 static void set_clock(jlong value);
890 };
891
892
893 // Interface to java.lang.invoke.MethodHandle objects
894
895 class MethodHandleEntry;
896
897 class java_lang_invoke_MethodHandle: AllStatic {
898 friend class JavaClasses;
899
900 private:
901 static int _type_offset; // the MethodType of this MH
902 static int _form_offset; // the LambdaForm of this MH
903
904 static void compute_offsets();
905
906 public:
907 // Accessors
908 static oop type(oop mh);
909 static void set_type(oop mh, oop mtype);
910
911 static oop form(oop mh);
912 static void set_form(oop mh, oop lform);
913
914 // Testers
915 static bool is_subclass(klassOop klass) {
916 return Klass::cast(klass)->is_subclass_of(SystemDictionary::MethodHandle_klass());
917 }
918 static bool is_instance(oop obj) {
919 return obj != NULL && is_subclass(obj->klass());
920 }
921
922 // Accessors for code generation:
923 static int type_offset_in_bytes() { return _type_offset; }
924 static int form_offset_in_bytes() { return _form_offset; }
925 };
926
927 // Interface to java.lang.invoke.DirectMethodHandle objects
928
929 class java_lang_invoke_DirectMethodHandle: AllStatic {
930 friend class JavaClasses;
931
932 private:
933 static int _member_offset; // the MemberName of this DMH
934
935 static void compute_offsets();
936
937 public:
938 // Accessors
939 static oop member(oop mh);
940
941 // Testers
942 static bool is_subclass(klassOop klass) {
943 return Klass::cast(klass)->is_subclass_of(SystemDictionary::DirectMethodHandle_klass());
944 }
945 static bool is_instance(oop obj) {
946 return obj != NULL && is_subclass(obj->klass());
947 }
948
949 // Accessors for code generation:
950 static int member_offset_in_bytes() { return _member_offset; }
951 };
952
953 // Interface to java.lang.invoke.LambdaForm objects
954 // (These are a private interface for managing adapter code generation.)
955
956 class java_lang_invoke_LambdaForm: AllStatic {
957 friend class JavaClasses;
958
959 private:
960 static int _vmentry_offset; // type is MemberName
961
962 static void compute_offsets();
963
964 public:
965 // Accessors
966 static oop vmentry(oop lform);
967 static void set_vmentry(oop lform, oop invoker);
968
969 // Testers
970 static bool is_subclass(klassOop klass) {
971 return SystemDictionary::LambdaForm_klass() != NULL &&
972 Klass::cast(klass)->is_subclass_of(SystemDictionary::LambdaForm_klass());
973 }
974 static bool is_instance(oop obj) {
975 return obj != NULL && is_subclass(obj->klass());
976 }
977
978 // Accessors for code generation:
979 static int vmentry_offset_in_bytes() { return _vmentry_offset; }
980 };
981
982
983 // Interface to java.lang.invoke.MemberName objects
984 // (These are a private interface for Java code to query the class hierarchy.)
985
986 #define MEMBERNAME_INJECTED_FIELDS(macro) \
987 macro(java_lang_invoke_MemberName, vmindex, intptr_signature, false) \
988 macro(java_lang_invoke_MemberName, vmtarget, object_signature, false)
989
990 class java_lang_invoke_MemberName: AllStatic {
991 friend class JavaClasses;
992
993 private:
994 // From java.lang.invoke.MemberName:
995 // private Class<?> clazz; // class in which the method is defined
996 // private String name; // may be null if not yet materialized
997 // private Object type; // may be null if not yet materialized
998 // private int flags; // modifier bits; see reflect.Modifier
999 // private Object vmtarget; // VM-specific target value
1000 // private intptr_t vmindex; // member index within class or interface
1001 static int _clazz_offset;
1002 static int _name_offset;
1003 static int _type_offset;
1004 static int _flags_offset;
1005 static int _vmtarget_offset;
1006 static int _vmindex_offset;
1007
1008 static void compute_offsets();
1009
1010 public:
1011 // Accessors
1012 static oop clazz(oop mname);
1013 static void set_clazz(oop mname, oop clazz);
1014
1015 static oop type(oop mname);
1016 static void set_type(oop mname, oop type);
1017
1018 static oop name(oop mname);
1019 static void set_name(oop mname, oop name);
1020
1021 static int flags(oop mname);
1022 static void set_flags(oop mname, int flags);
1023
1024 static oop vmtarget(oop mname);
1025 static void set_vmtarget(oop mname, oop target);
1026 static void adjust_vmtarget(oop mname, oop target);
1027
1028 static intptr_t vmindex(oop mname);
1029 static void set_vmindex(oop mname, intptr_t index);
1030
1031 // Testers
1032 static bool is_subclass(klassOop klass) {
1033 return Klass::cast(klass)->is_subclass_of(SystemDictionary::MemberName_klass());
1034 }
1035 static bool is_instance(oop obj) {
1036 return obj != NULL && is_subclass(obj->klass());
1037 }
1038
1039 // Relevant integer codes (keep these in synch. with MethodHandleNatives.Constants):
1040 enum {
1041 MN_IS_METHOD = 0x00010000, // method (not constructor)
1042 MN_IS_CONSTRUCTOR = 0x00020000, // constructor
1043 MN_IS_FIELD = 0x00040000, // field
1044 MN_IS_TYPE = 0x00080000, // nested type
1045 MN_REFERENCE_KIND_SHIFT = 24, // refKind
1046 MN_REFERENCE_KIND_MASK = 0x0F000000 >> MN_REFERENCE_KIND_SHIFT,
1047 // The SEARCH_* bits are not for MN.flags but for the matchFlags argument of MHN.getMembers:
1048 MN_SEARCH_SUPERCLASSES = 0x00100000, // walk super classes
1049 MN_SEARCH_INTERFACES = 0x00200000 // walk implemented interfaces
1050 };
1051
1052 // Accessors for code generation:
1053 static int clazz_offset_in_bytes() { return _clazz_offset; }
1054 static int type_offset_in_bytes() { return _type_offset; }
1055 static int name_offset_in_bytes() { return _name_offset; }
1056 static int flags_offset_in_bytes() { return _flags_offset; }
1057 static int vmtarget_offset_in_bytes() { return _vmtarget_offset; }
1058 static int vmindex_offset_in_bytes() { return _vmindex_offset; }
1059 };
1060
1061
1062 // Interface to java.lang.invoke.MethodType objects
1063
1064 class java_lang_invoke_MethodType: AllStatic {
1065 friend class JavaClasses;
1066
1067 private:
1068 static int _rtype_offset;
1069 static int _ptypes_offset;
1070
1071 static void compute_offsets();
1072
1073 public:
1074 // Accessors
1075 static oop rtype(oop mt);
1076 static objArrayOop ptypes(oop mt);
1077
1078 static oop ptype(oop mt, int index);
1079 static int ptype_count(oop mt);
1080
1081 static int ptype_slot_count(oop mt); // extra counts for long/double
1082 static int rtype_slot_count(oop mt); // extra counts for long/double
1083
1084 static Symbol* as_signature(oop mt, bool intern_if_not_found, TRAPS);
1085 static void print_signature(oop mt, outputStream* st);
1086
1087 static bool is_instance(oop obj) {
1088 return obj != NULL && obj->klass() == SystemDictionary::MethodType_klass();
1089 }
1090
1091 static bool equals(oop mt1, oop mt2);
1092
1093 // Accessors for code generation:
1094 static int rtype_offset_in_bytes() { return _rtype_offset; }
1095 static int ptypes_offset_in_bytes() { return _ptypes_offset; }
1096 };
1097
1098
1099 // Interface to java.lang.invoke.CallSite objects
1100
1101 class java_lang_invoke_CallSite: AllStatic {
1102 friend class JavaClasses;
1103
1104 private:
1105 static int _target_offset;
1106
1107 static void compute_offsets();
1108
1109 public:
1110 // Accessors
1111 static oop target( oop site) { return site->obj_field( _target_offset); }
1112 static void set_target( oop site, oop target) { site->obj_field_put( _target_offset, target); }
1113
1114 static volatile oop target_volatile(oop site) { return site->obj_field_volatile( _target_offset); }
1115 static void set_target_volatile(oop site, oop target) { site->obj_field_put_volatile(_target_offset, target); }
1116
1117 // Testers
1118 static bool is_subclass(klassOop klass) {
1119 return Klass::cast(klass)->is_subclass_of(SystemDictionary::CallSite_klass());
1120 }
1121 static bool is_instance(oop obj) {
1122 return obj != NULL && is_subclass(obj->klass());
1123 }
1124
1125 // Accessors for code generation:
1126 static int target_offset_in_bytes() { return _target_offset; }
1127 };
1128
1129
1130 // Interface to java.security.AccessControlContext objects
1131
1132 class java_security_AccessControlContext: AllStatic {
1133 private:
1134 // Note that for this class the layout changed between JDK1.2 and JDK1.3,
1135 // so we compute the offsets at startup rather than hard-wiring them.
1136 static int _context_offset;
1137 static int _privilegedContext_offset;
1138 static int _isPrivileged_offset;
1139 static int _isAuthorized_offset;
1140
1141 static void compute_offsets();
1142 public:
1143 static oop create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS);
1144
1145 static bool is_authorized(Handle context);
1146
1147 // Debugging/initialization
1148 friend class JavaClasses;
1149 };
1150
1151
1152 // Interface to java.lang.ClassLoader objects
1153
1154 class java_lang_ClassLoader : AllStatic {
1155 private:
1156 enum {
1157 hc_parent_offset = 0
1158 };
1159
1160 static bool offsets_computed;
1161 static int parent_offset;
1162 static int parallelCapable_offset;
1163
1164 static void compute_offsets();
1165
1166 public:
1167 static oop parent(oop loader);
1168 static bool isAncestor(oop loader, oop cl);
1169
1170 // Support for parallelCapable field
1171 static bool parallelCapable(oop the_class_mirror);
1172
1173 static bool is_trusted_loader(oop loader);
1174
1175 // Fix for 4474172
1176 static oop non_reflection_class_loader(oop loader);
1177
1178 // Testers
1179 static bool is_subclass(klassOop klass) {
1180 return Klass::cast(klass)->is_subclass_of(SystemDictionary::ClassLoader_klass());
1181 }
1182 static bool is_instance(oop obj) {
1183 return obj != NULL && is_subclass(obj->klass());
1184 }
1185
1186 // Debugging
1187 friend class JavaClasses;
1188 };
1189
1190
1191 // Interface to java.lang.System objects
1192
1193 class java_lang_System : AllStatic {
1194 private:
1195 enum {
1196 hc_static_in_offset = 0,
1197 hc_static_out_offset = 1,
1198 hc_static_err_offset = 2,
1199 hc_static_security_offset = 3
1200 };
1201
1202 static int static_in_offset;
1203 static int static_out_offset;
1204 static int static_err_offset;
1205 static int static_security_offset;
1206
1207 public:
1208 static int in_offset_in_bytes();
1209 static int out_offset_in_bytes();
1210 static int err_offset_in_bytes();
1211
1212 static bool has_security_manager();
1213
1214 // Debugging
1215 friend class JavaClasses;
1216 };
1217
1218
1219 // Interface to java.lang.StackTraceElement objects
1220
1221 class java_lang_StackTraceElement: AllStatic {
1222 private:
1223 enum {
1224 hc_declaringClass_offset = 0,
1225 hc_methodName_offset = 1,
1226 hc_fileName_offset = 2,
1227 hc_lineNumber_offset = 3
1228 };
1229
1230 static int declaringClass_offset;
1231 static int methodName_offset;
1232 static int fileName_offset;
1233 static int lineNumber_offset;
1234
1235 public:
1236 // Setters
1237 static void set_declaringClass(oop element, oop value);
1238 static void set_methodName(oop element, oop value);
1239 static void set_fileName(oop element, oop value);
1240 static void set_lineNumber(oop element, int value);
1241
1242 // Create an instance of StackTraceElement
1243 static oop create(methodHandle m, int bci, TRAPS);
1244
1245 // Debugging
1246 friend class JavaClasses;
1247 };
1248
1249
1250 // Interface to java.lang.AssertionStatusDirectives objects
1251
1252 class java_lang_AssertionStatusDirectives: AllStatic {
1253 private:
1254 enum {
1255 hc_classes_offset,
1256 hc_classEnabled_offset,
1257 hc_packages_offset,
1258 hc_packageEnabled_offset,
1259 hc_deflt_offset
1260 };
1261
1262 static int classes_offset;
1263 static int classEnabled_offset;
1264 static int packages_offset;
1265 static int packageEnabled_offset;
1266 static int deflt_offset;
1267
1268 public:
1269 // Setters
1270 static void set_classes(oop obj, oop val);
1271 static void set_classEnabled(oop obj, oop val);
1272 static void set_packages(oop obj, oop val);
1273 static void set_packageEnabled(oop obj, oop val);
1274 static void set_deflt(oop obj, bool val);
1275 // Debugging
1276 friend class JavaClasses;
1277 };
1278
1279
1280 class java_nio_Buffer: AllStatic {
1281 private:
1282 static int _limit_offset;
1283
1284 public:
1285 static int limit_offset();
1286 static void compute_offsets();
1287 };
1288
1289 class java_util_concurrent_locks_AbstractOwnableSynchronizer : AllStatic {
1290 private:
1291 static int _owner_offset;
1292 public:
1293 static void initialize(TRAPS);
1294 static oop get_owner_threadObj(oop obj);
1295 };
1296
1297 // Use to declare fields that need to be injected into Java classes
1298 // for the JVM to use. The name_index and signature_index are
1299 // declared in vmSymbols. The may_be_java flag is used to declare
1300 // fields that might already exist in Java but should be injected if
1301 // they don't. Otherwise the field is unconditionally injected and
1302 // the JVM uses the injected one. This is to ensure that name
1303 // collisions don't occur. In general may_be_java should be false
1304 // unless there's a good reason.
1305
1306 class InjectedField {
1307 public:
1308 const SystemDictionary::WKID klass_id;
1309 const vmSymbols::SID name_index;
1310 const vmSymbols::SID signature_index;
1311 const bool may_be_java;
1312
1313
1314 klassOop klass() const { return SystemDictionary::well_known_klass(klass_id); }
1315 Symbol* name() const { return lookup_symbol(name_index); }
1316 Symbol* signature() const { return lookup_symbol(signature_index); }
1317
1318 int compute_offset();
1319
1320 // Find the Symbol for this index
1321 static Symbol* lookup_symbol(int symbol_index) {
1322 return vmSymbols::symbol_at((vmSymbols::SID)symbol_index);
1323 }
1324 };
1325
1326 #define DECLARE_INJECTED_FIELD_ENUM(klass, name, signature, may_be_java) \
1327 klass##_##name##_enum,
1328
1329 #define ALL_INJECTED_FIELDS(macro) \
1330 CLASS_INJECTED_FIELDS(macro) \
1331 MEMBERNAME_INJECTED_FIELDS(macro)
1332
1333 // Interface to hard-coded offset checking
1334
1335 class JavaClasses : AllStatic {
1336 private:
1337
1338 static InjectedField _injected_fields[];
1339
1340 static bool check_offset(const char *klass_name, int offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1341 static bool check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1342 static bool check_constant(const char *klass_name, int constant, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1343
1344 public:
1345 enum InjectedFieldID {
1346 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD_ENUM)
1347 MAX_enum
1348 };
1349
1350 static int compute_injected_offset(InjectedFieldID id);
1351
1352 static void compute_hard_coded_offsets();
1353 static void compute_offsets();
1354 static void check_offsets() PRODUCT_RETURN;
1355
1356 static InjectedField* get_injected(Symbol* class_name, int* field_count);
1357 };
1358
1359 #undef DECLARE_INJECTED_FIELD_ENUM
1360
1361 #endif // SHARE_VM_CLASSFILE_JAVACLASSES_HPP