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, TRAPS);
63
64 static void set_offset(oop string, int offset) {
65 assert(initialized, "Must be initialized");
66 if (offset_offset > 0) {
67 string->int_field_put(offset_offset, offset);
68 }
69 }
70 static void set_count( oop string, int count) {
71 assert(initialized, "Must be initialized");
72 if (count_offset > 0) {
73 string->int_field_put(count_offset, count);
74 }
75 }
76
77 public:
78 static void compute_offsets();
79
80 // Instance creation
81 static Handle create_from_unicode(jchar* unicode, int len, TRAPS);
82 static oop create_oop_from_unicode(jchar* unicode, int len, TRAPS);
83 static Handle create_from_str(const char* utf8_str, TRAPS);
84 static oop create_oop_from_str(const char* utf8_str, TRAPS);
85 static Handle create_from_symbol(Symbol* symbol, TRAPS);
86 static Handle create_from_platform_dependent_str(const char* str, TRAPS);
87 static Handle char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS);
88
89 static bool has_offset_field() {
90 assert(initialized, "Must be initialized");
91 return (offset_offset > 0);
92 }
93
94 static bool has_count_field() {
95 assert(initialized, "Must be initialized");
96 return (count_offset > 0);
97 }
98
99 static bool has_hash_field() {
100 assert(initialized, "Must be initialized");
101 return (hash_offset > 0);
102 }
103
104 static int value_offset_in_bytes() {
105 assert(initialized && (value_offset > 0), "Must be initialized");
106 return value_offset;
107 }
108 static int count_offset_in_bytes() {
109 assert(initialized && (count_offset > 0), "Must be initialized");
110 return count_offset;
111 }
112 static int offset_offset_in_bytes() {
113 assert(initialized && (offset_offset > 0), "Must be initialized");
114 return offset_offset;
115 }
116 static int hash_offset_in_bytes() {
117 assert(initialized && (hash_offset > 0), "Must be initialized");
118 return hash_offset;
119 }
120
121 static void set_value(oop string, typeArrayOop buffer) {
122 assert(initialized && (value_offset > 0), "Must be initialized");
123 string->obj_field_put(value_offset, (oop)buffer);
124 }
125 static void set_hash(oop string, unsigned int hash) {
126 assert(initialized && (hash_offset > 0), "Must be initialized");
127 string->int_field_put(hash_offset, hash);
128 }
129
130 // Accessors
131 static typeArrayOop value(oop java_string) {
132 assert(initialized && (value_offset > 0), "Must be initialized");
133 assert(is_instance(java_string), "must be java_string");
134 return (typeArrayOop) java_string->obj_field(value_offset);
135 }
136 static unsigned int hash(oop java_string) {
137 assert(initialized && (hash_offset > 0), "Must be initialized");
138 assert(is_instance(java_string), "must be java_string");
139 return java_string->int_field(hash_offset);
140 }
141 static int offset(oop java_string) {
142 assert(initialized, "Must be initialized");
143 assert(is_instance(java_string), "must be java_string");
144 if (offset_offset > 0) {
145 return java_string->int_field(offset_offset);
146 } else {
147 return 0;
148 }
149 }
150 static int length(oop java_string) {
151 assert(initialized, "Must be initialized");
152 assert(is_instance(java_string), "must be java_string");
153 if (count_offset > 0) {
154 return java_string->int_field(count_offset);
155 } else {
156 return ((typeArrayOop)java_string->obj_field(value_offset))->length();
157 }
158 }
159 static int utf8_length(oop java_string);
160
161 // String converters
162 static char* as_utf8_string(oop java_string);
163 static char* as_utf8_string(oop java_string, char* buf, int buflen);
164 static char* as_utf8_string(oop java_string, int start, int len);
165 static char* as_utf8_string(oop java_string, int start, int len, char* buf, int buflen);
166 static char* as_platform_dependent_str(Handle java_string, TRAPS);
167 static jchar* as_unicode_string(oop java_string, int& length, TRAPS);
168 // produce an ascii string with all other values quoted using \u####
169 static char* as_quoted_ascii(oop java_string);
170
171 // Compute the hash value for a java.lang.String object which would
172 // contain the characters passed in.
173 //
174 // As the hash value used by the String object itself, in
175 // String.hashCode(). This value is normally calculated in Java code
176 // in the String.hashCode method(), but is precomputed for String
177 // objects in the shared archive file.
178 // hash P(31) from Kernighan & Ritchie
179 //
180 // For this reason, THIS ALGORITHM MUST MATCH String.hashCode().
181 template <typename T> static unsigned int hash_code(T* s, int len) {
182 unsigned int h = 0;
183 while (len-- > 0) {
184 h = 31*h + (unsigned int) *s;
185 s++;
186 }
187 return h;
188 }
189 static unsigned int hash_code(oop java_string);
190
191 // This is the string hash code used by the StringTable, which may be
192 // the same as String.hashCode or an alternate hash code.
193 static unsigned int hash_string(oop java_string);
194
195 static bool equals(oop java_string, jchar* chars, int len);
196 static bool equals(oop str1, oop str2);
197
198 // Conversion between '.' and '/' formats
199 static Handle externalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '/', '.', THREAD); }
200 static Handle internalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '.', '/', THREAD); }
201
202 // Conversion
203 static Symbol* as_symbol(Handle java_string, TRAPS);
204 static Symbol* as_symbol_or_null(oop java_string);
205
206 // Testers
207 static bool is_instance(oop obj) {
208 return obj != NULL && obj->klass() == SystemDictionary::String_klass();
209 }
210
211 // Debugging
212 static void print(oop java_string, outputStream* st);
213 friend class JavaClasses;
214 };
215
216
217 // Interface to java.lang.Class objects
218
219 #define CLASS_INJECTED_FIELDS(macro) \
220 macro(java_lang_Class, klass, intptr_signature, false) \
221 macro(java_lang_Class, array_klass, intptr_signature, false) \
222 macro(java_lang_Class, oop_size, int_signature, false) \
223 macro(java_lang_Class, static_oop_field_count, int_signature, false) \
224 macro(java_lang_Class, protection_domain, object_signature, false) \
225 macro(java_lang_Class, signers, object_signature, false)
226
227 class java_lang_Class : AllStatic {
228 friend class VMStructs;
229
230 private:
231 // The fake offsets are added by the class loader when java.lang.Class is loaded
232
233 static int _klass_offset;
234 static int _array_klass_offset;
235
236 static int _oop_size_offset;
237 static int _static_oop_field_count_offset;
238
239 static int _protection_domain_offset;
240 static int _init_lock_offset;
241 static int _signers_offset;
242 static int _class_loader_offset;
243 static int _component_mirror_offset;
244
245 static bool offsets_computed;
246 static int _classData_offset;
247 static int classRedefinedCount_offset;
248
249 static GrowableArray<Klass*>* _fixup_mirror_list;
250
251 static void set_init_lock(oop java_class, oop init_lock);
252 static void set_protection_domain(oop java_class, oop protection_domain);
253 static void set_class_loader(oop java_class, oop class_loader);
254 static void set_component_mirror(oop java_class, oop comp_mirror);
255 static void initialize_mirror_fields(KlassHandle k, Handle mirror, Handle protection_domain, TRAPS);
256 public:
257 static void compute_offsets();
258
259 // Instance creation
260 static void create_mirror(KlassHandle k, Handle class_loader,
261 Handle protection_domain, TRAPS);
262 static void fixup_mirror(KlassHandle k, TRAPS);
263 static oop create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS);
264 // Conversion
265 static Klass* as_Klass(oop java_class);
266 static void set_klass(oop java_class, Klass* klass);
267 static BasicType as_BasicType(oop java_class, Klass** reference_klass = NULL);
268 static BasicType as_BasicType(oop java_class, KlassHandle* reference_klass) {
269 Klass* refk_oop = NULL;
270 BasicType result = as_BasicType(java_class, &refk_oop);
271 (*reference_klass) = KlassHandle(refk_oop);
272 return result;
273 }
274 static Symbol* as_signature(oop java_class, bool intern_if_not_found, TRAPS);
275 static void print_signature(oop java_class, outputStream *st);
276 // Testing
277 static bool is_instance(oop obj) {
278 return obj != NULL && obj->klass() == SystemDictionary::Class_klass();
279 }
280 static bool is_primitive(oop java_class);
281 static BasicType primitive_type(oop java_class);
282 static oop primitive_mirror(BasicType t);
283 // JVM_NewArray support
284 static Klass* array_klass(oop java_class);
285 static void set_array_klass(oop java_class, Klass* klass);
286 // compiler support for class operations
287 static int klass_offset_in_bytes() { return _klass_offset; }
288 static int array_klass_offset_in_bytes() { return _array_klass_offset; }
289
290 static oop classData(oop obj);
291
292 // Support for classRedefinedCount field
293 static int classRedefinedCount(oop the_class_mirror);
294 static void set_classRedefinedCount(oop the_class_mirror, int value);
295
296 // Support for embedded per-class oops
297 static oop protection_domain(oop java_class);
298 static oop init_lock(oop java_class);
299 static oop component_mirror(oop java_class);
300 static objArrayOop signers(oop java_class);
301 static void set_signers(oop java_class, objArrayOop signers);
302
303 static oop class_loader(oop java_class);
304
305 static int oop_size(oop java_class);
306 static void set_oop_size(oop java_class, int size);
307 static int static_oop_field_count(oop java_class);
308 static void set_static_oop_field_count(oop java_class, int size);
309
310 static GrowableArray<Klass*>* fixup_mirror_list() {
311 return _fixup_mirror_list;
312 }
313 static void set_fixup_mirror_list(GrowableArray<Klass*>* v) {
314 _fixup_mirror_list = v;
315 }
316 // Debugging
317 friend class JavaClasses;
318 friend class InstanceKlass; // verification code accesses offsets
319 friend class ClassFileParser; // access to number_of_fake_fields_sequenceNumber_offset
320 };
321
322 /**
323 * java.lang.Class$ClassData
324 */
325 class java_lang_Class_ClassData : AllStatic {
326 friend class JavaClasses;
327
328 private:
329 static int _elementData_offset;
330 static int _size_offset;
331 static int _sequenceNumber_offset;
332
333 static void compute_offsets();
334
335 public:
336 static bool is_instance(oop obj);
337 static oop memberNameTable(oop obj);
338 static objArrayOop elementData(oop obj);
339 static int size(oop obj);
340 static void incSequenceNumber(oop obj);
341
342 };
343
344 // Interface to java.lang.Thread objects
345
346 class java_lang_Thread : AllStatic {
347 private:
348 // Note that for this class the layout changed between JDK1.2 and JDK1.3,
349 // so we compute the offsets at startup rather than hard-wiring them.
350 static int _name_offset;
351 static int _group_offset;
352 static int _contextClassLoader_offset;
353 static int _inheritedAccessControlContext_offset;
354 static int _priority_offset;
355 static int _eetop_offset;
356 static int _daemon_offset;
357 static int _stillborn_offset;
358 static int _stackSize_offset;
359 static int _tid_offset;
360 static int _thread_status_offset;
361 static int _park_blocker_offset;
362 static int _park_event_offset ;
363
364 static void compute_offsets();
365
366 public:
367 // Instance creation
368 static oop create();
369 // Returns the JavaThread associated with the thread obj
370 static JavaThread* thread(oop java_thread);
371 // Set JavaThread for instance
372 static void set_thread(oop java_thread, JavaThread* thread);
373 // Name
374 static typeArrayOop name(oop java_thread);
375 static void set_name(oop java_thread, typeArrayOop name);
376 // Priority
377 static ThreadPriority priority(oop java_thread);
378 static void set_priority(oop java_thread, ThreadPriority priority);
379 // Thread group
380 static oop threadGroup(oop java_thread);
381 // Stillborn
382 static bool is_stillborn(oop java_thread);
383 static void set_stillborn(oop java_thread);
384 // Alive (NOTE: this is not really a field, but provides the correct
385 // definition without doing a Java call)
386 static bool is_alive(oop java_thread);
387 // Daemon
388 static bool is_daemon(oop java_thread);
389 static void set_daemon(oop java_thread);
390 // Context ClassLoader
391 static oop context_class_loader(oop java_thread);
392 // Control context
393 static oop inherited_access_control_context(oop java_thread);
394 // Stack size hint
395 static jlong stackSize(oop java_thread);
396 // Thread ID
397 static jlong thread_id(oop java_thread);
398
399 // Blocker object responsible for thread parking
400 static oop park_blocker(oop java_thread);
401
402 // Pointer to type-stable park handler, encoded as jlong.
403 // Should be set when apparently null
404 // For details, see unsafe.cpp Unsafe_Unpark
405 static jlong park_event(oop java_thread);
406 static bool set_park_event(oop java_thread, jlong ptr);
407
408 // Java Thread Status for JVMTI and M&M use.
409 // This thread status info is saved in threadStatus field of
410 // java.lang.Thread java class.
411 enum ThreadStatus {
412 NEW = 0,
413 RUNNABLE = JVMTI_THREAD_STATE_ALIVE + // runnable / running
414 JVMTI_THREAD_STATE_RUNNABLE,
415 SLEEPING = JVMTI_THREAD_STATE_ALIVE + // Thread.sleep()
416 JVMTI_THREAD_STATE_WAITING +
417 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
418 JVMTI_THREAD_STATE_SLEEPING,
419 IN_OBJECT_WAIT = JVMTI_THREAD_STATE_ALIVE + // Object.wait()
420 JVMTI_THREAD_STATE_WAITING +
421 JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
422 JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
423 IN_OBJECT_WAIT_TIMED = JVMTI_THREAD_STATE_ALIVE + // Object.wait(long)
424 JVMTI_THREAD_STATE_WAITING +
425 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
426 JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
427 PARKED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park()
428 JVMTI_THREAD_STATE_WAITING +
429 JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
430 JVMTI_THREAD_STATE_PARKED,
431 PARKED_TIMED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park(long)
432 JVMTI_THREAD_STATE_WAITING +
433 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
434 JVMTI_THREAD_STATE_PARKED,
435 BLOCKED_ON_MONITOR_ENTER = JVMTI_THREAD_STATE_ALIVE + // (re-)entering a synchronization block
436 JVMTI_THREAD_STATE_BLOCKED_ON_MONITOR_ENTER,
437 TERMINATED = JVMTI_THREAD_STATE_TERMINATED
438 };
439 // Write thread status info to threadStatus field of java.lang.Thread.
440 static void set_thread_status(oop java_thread_oop, ThreadStatus status);
441 // Read thread status info from threadStatus field of java.lang.Thread.
442 static ThreadStatus get_thread_status(oop java_thread_oop);
443
444 static const char* thread_status_name(oop java_thread_oop);
445
446 // Debugging
447 friend class JavaClasses;
448 };
449
450 // Interface to java.lang.ThreadGroup objects
451
452 class java_lang_ThreadGroup : AllStatic {
453 private:
454 static int _parent_offset;
455 static int _name_offset;
456 static int _threads_offset;
457 static int _groups_offset;
458 static int _maxPriority_offset;
459 static int _destroyed_offset;
460 static int _daemon_offset;
461 static int _vmAllowSuspension_offset;
462 static int _nthreads_offset;
463 static int _ngroups_offset;
464
465 static void compute_offsets();
466
467 public:
468 // parent ThreadGroup
469 static oop parent(oop java_thread_group);
470 // name
471 static typeArrayOop name(oop java_thread_group);
472 // ("name as oop" accessor is not necessary)
473 // Number of threads in group
474 static int nthreads(oop java_thread_group);
475 // threads
476 static objArrayOop threads(oop java_thread_group);
477 // Number of threads in group
478 static int ngroups(oop java_thread_group);
479 // groups
480 static objArrayOop groups(oop java_thread_group);
481 // maxPriority in group
482 static ThreadPriority maxPriority(oop java_thread_group);
483 // Destroyed
484 static bool is_destroyed(oop java_thread_group);
485 // Daemon
486 static bool is_daemon(oop java_thread_group);
487 // vmAllowSuspension
488 static bool is_vmAllowSuspension(oop java_thread_group);
489 // Debugging
490 friend class JavaClasses;
491 };
492
493
494
495 // Interface to java.lang.Throwable objects
496
497 class java_lang_Throwable: AllStatic {
498 friend class BacktraceBuilder;
499
500 private:
501 // Offsets
502 enum {
503 hc_backtrace_offset = 0,
504 hc_detailMessage_offset = 1,
505 hc_cause_offset = 2, // New since 1.4
506 hc_stackTrace_offset = 3 // New since 1.4
507 };
508 enum {
509 hc_static_unassigned_stacktrace_offset = 0 // New since 1.7
510 };
511 // Trace constants
512 enum {
513 trace_methods_offset = 0,
514 trace_bcis_offset = 1,
515 trace_mirrors_offset = 2,
516 trace_next_offset = 3,
517 trace_size = 4,
518 trace_chunk_size = 32
519 };
520
521 static int backtrace_offset;
522 static int detailMessage_offset;
523 static int cause_offset;
524 static int stackTrace_offset;
525 static int static_unassigned_stacktrace_offset;
526
527 // Printing
528 static char* print_stack_element_to_buffer(Handle mirror, int method, int version, int bci);
529 // StackTrace (programmatic access, new since 1.4)
530 static void clear_stacktrace(oop throwable);
531 // No stack trace available
532 static const char* no_stack_trace_message();
533 // Stacktrace (post JDK 1.7.0 to allow immutability protocol to be followed)
534 static void set_stacktrace(oop throwable, oop st_element_array);
535 static oop unassigned_stacktrace();
536
537 public:
538 // Backtrace
539 static oop backtrace(oop throwable);
540 static void set_backtrace(oop throwable, oop value);
541 // Needed by JVMTI to filter out this internal field.
542 static int get_backtrace_offset() { return backtrace_offset;}
543 static int get_detailMessage_offset() { return detailMessage_offset;}
544 // Message
545 static oop message(oop throwable);
546 static oop message(Handle throwable);
547 static void set_message(oop throwable, oop value);
548 static Symbol* detail_message(oop throwable);
549 static void print_stack_element(outputStream *st, Handle mirror, int method,
550 int version, int bci);
551 static void print_stack_element(outputStream *st, methodHandle method, int bci);
552 static void print_stack_usage(Handle stream);
553
554 // Allocate space for backtrace (created but stack trace not filled in)
555 static void allocate_backtrace(Handle throwable, TRAPS);
556 // Fill in current stack trace for throwable with preallocated backtrace (no GC)
557 static void fill_in_stack_trace_of_preallocated_backtrace(Handle throwable);
558 // Fill in current stack trace, can cause GC
559 static void fill_in_stack_trace(Handle throwable, methodHandle method, TRAPS);
560 static void fill_in_stack_trace(Handle throwable, methodHandle method = methodHandle());
561 // Programmatic access to stack trace
562 static oop get_stack_trace_element(oop throwable, int index, TRAPS);
563 static int get_stack_trace_depth(oop throwable, TRAPS);
564 // Printing
565 static void print(oop throwable, outputStream* st);
566 static void print(Handle throwable, outputStream* st);
567 static void print_stack_trace(oop throwable, outputStream* st);
568 // Debugging
569 friend class JavaClasses;
570 };
571
572
573 // Interface to java.lang.reflect.AccessibleObject objects
574
575 class java_lang_reflect_AccessibleObject: AllStatic {
576 private:
577 // Note that to reduce dependencies on the JDK we compute these
578 // offsets at run-time.
579 static int override_offset;
580
581 static void compute_offsets();
582
583 public:
584 // Accessors
585 static jboolean override(oop reflect);
586 static void set_override(oop reflect, jboolean value);
587
588 // Debugging
589 friend class JavaClasses;
590 };
591
592
593 // Interface to java.lang.reflect.Method objects
594
595 class java_lang_reflect_Method : public java_lang_reflect_AccessibleObject {
596 private:
597 // Note that to reduce dependencies on the JDK we compute these
598 // offsets at run-time.
599 static int clazz_offset;
600 static int name_offset;
601 static int returnType_offset;
602 static int parameterTypes_offset;
603 static int exceptionTypes_offset;
604 static int slot_offset;
605 static int modifiers_offset;
606 static int signature_offset;
607 static int annotations_offset;
608 static int parameter_annotations_offset;
609 static int annotation_default_offset;
610 static int type_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 method);
623 static void set_name(oop method, oop value);
624
625 static oop return_type(oop method);
626 static void set_return_type(oop method, oop value);
627
628 static oop parameter_types(oop method);
629 static void set_parameter_types(oop method, oop value);
630
631 static oop exception_types(oop method);
632 static void set_exception_types(oop method, oop value);
633
634 static int slot(oop reflect);
635 static void set_slot(oop reflect, int value);
636
637 static int modifiers(oop method);
638 static void set_modifiers(oop method, int value);
639
640 static bool has_signature_field();
641 static oop signature(oop method);
642 static void set_signature(oop method, oop value);
643
644 static bool has_annotations_field();
645 static oop annotations(oop method);
646 static void set_annotations(oop method, oop value);
647
648 static bool has_parameter_annotations_field();
649 static oop parameter_annotations(oop method);
650 static void set_parameter_annotations(oop method, oop value);
651
652 static bool has_annotation_default_field();
653 static oop annotation_default(oop method);
654 static void set_annotation_default(oop method, oop value);
655
656 static bool has_type_annotations_field();
657 static oop type_annotations(oop method);
658 static void set_type_annotations(oop method, oop value);
659
660 // Debugging
661 friend class JavaClasses;
662 };
663
664
665 // Interface to java.lang.reflect.Constructor objects
666
667 class java_lang_reflect_Constructor : public java_lang_reflect_AccessibleObject {
668 private:
669 // Note that to reduce dependencies on the JDK we compute these
670 // offsets at run-time.
671 static int clazz_offset;
672 static int parameterTypes_offset;
673 static int exceptionTypes_offset;
674 static int slot_offset;
675 static int modifiers_offset;
676 static int signature_offset;
677 static int annotations_offset;
678 static int parameter_annotations_offset;
679 static int type_annotations_offset;
680
681 static void compute_offsets();
682
683 public:
684 // Allocation
685 static Handle create(TRAPS);
686
687 // Accessors
688 static oop clazz(oop reflect);
689 static void set_clazz(oop reflect, oop value);
690
691 static oop parameter_types(oop constructor);
692 static void set_parameter_types(oop constructor, oop value);
693
694 static oop exception_types(oop constructor);
695 static void set_exception_types(oop constructor, oop value);
696
697 static int slot(oop reflect);
698 static void set_slot(oop reflect, int value);
699
700 static int modifiers(oop constructor);
701 static void set_modifiers(oop constructor, int value);
702
703 static bool has_signature_field();
704 static oop signature(oop constructor);
705 static void set_signature(oop constructor, oop value);
706
707 static bool has_annotations_field();
708 static oop annotations(oop constructor);
709 static void set_annotations(oop constructor, oop value);
710
711 static bool has_parameter_annotations_field();
712 static oop parameter_annotations(oop method);
713 static void set_parameter_annotations(oop method, oop value);
714
715 static bool has_type_annotations_field();
716 static oop type_annotations(oop constructor);
717 static void set_type_annotations(oop constructor, oop value);
718
719 // Debugging
720 friend class JavaClasses;
721 };
722
723
724 // Interface to java.lang.reflect.Field objects
725
726 class java_lang_reflect_Field : public java_lang_reflect_AccessibleObject {
727 private:
728 // Note that to reduce dependencies on the JDK we compute these
729 // offsets at run-time.
730 static int clazz_offset;
731 static int name_offset;
732 static int type_offset;
733 static int slot_offset;
734 static int modifiers_offset;
735 static int signature_offset;
736 static int annotations_offset;
737 static int type_annotations_offset;
738
739 static void compute_offsets();
740
741 public:
742 // Allocation
743 static Handle create(TRAPS);
744
745 // Accessors
746 static oop clazz(oop reflect);
747 static void set_clazz(oop reflect, oop value);
748
749 static oop name(oop field);
750 static void set_name(oop field, oop value);
751
752 static oop type(oop field);
753 static void set_type(oop field, oop value);
754
755 static int slot(oop reflect);
756 static void set_slot(oop reflect, int value);
757
758 static int modifiers(oop field);
759 static void set_modifiers(oop field, int value);
760
761 static bool has_signature_field();
762 static oop signature(oop constructor);
763 static void set_signature(oop constructor, oop value);
764
765 static bool has_annotations_field();
766 static oop annotations(oop constructor);
767 static void set_annotations(oop constructor, oop value);
768
769 static bool has_parameter_annotations_field();
770 static oop parameter_annotations(oop method);
771 static void set_parameter_annotations(oop method, oop value);
772
773 static bool has_annotation_default_field();
774 static oop annotation_default(oop method);
775 static void set_annotation_default(oop method, oop value);
776
777 static bool has_type_annotations_field();
778 static oop type_annotations(oop field);
779 static void set_type_annotations(oop field, oop value);
780
781 // Debugging
782 friend class JavaClasses;
783 };
784
785 class java_lang_reflect_Parameter {
786 private:
787 // Note that to reduce dependencies on the JDK we compute these
788 // offsets at run-time.
789 static int name_offset;
790 static int modifiers_offset;
791 static int index_offset;
792 static int executable_offset;
793
794 static void compute_offsets();
795
796 public:
797 // Allocation
798 static Handle create(TRAPS);
799
800 // Accessors
801 static oop name(oop field);
802 static void set_name(oop field, oop value);
803
804 static int index(oop reflect);
805 static void set_index(oop reflect, int value);
806
807 static int modifiers(oop reflect);
808 static void set_modifiers(oop reflect, int value);
809
810 static oop executable(oop constructor);
811 static void set_executable(oop constructor, oop value);
812
813 friend class JavaClasses;
814 };
815
816 // Interface to sun.reflect.ConstantPool objects
817 class sun_reflect_ConstantPool {
818 private:
819 // Note that to reduce dependencies on the JDK we compute these
820 // offsets at run-time.
821 static int _oop_offset;
822
823 static void compute_offsets();
824
825 public:
826 // Allocation
827 static Handle create(TRAPS);
828
829 // Accessors
830 static void set_cp(oop reflect, ConstantPool* value);
831 static int oop_offset() {
832 return _oop_offset;
833 }
834
835 static ConstantPool* get_cp(oop reflect);
836
837 // Debugging
838 friend class JavaClasses;
839 };
840
841 // Interface to sun.reflect.UnsafeStaticFieldAccessorImpl objects
842 class sun_reflect_UnsafeStaticFieldAccessorImpl {
843 private:
844 static int _base_offset;
845 static void compute_offsets();
846
847 public:
848 static int base_offset() {
849 return _base_offset;
850 }
851
852 // Debugging
853 friend class JavaClasses;
854 };
855
856 // Interface to java.lang primitive type boxing objects:
857 // - java.lang.Boolean
858 // - java.lang.Character
859 // - java.lang.Float
860 // - java.lang.Double
861 // - java.lang.Byte
862 // - java.lang.Short
863 // - java.lang.Integer
864 // - java.lang.Long
865
866 // This could be separated out into 8 individual classes.
867
868 class java_lang_boxing_object: AllStatic {
869 private:
870 enum {
871 hc_value_offset = 0
872 };
873 static int value_offset;
874 static int long_value_offset;
875
876 static oop initialize_and_allocate(BasicType type, TRAPS);
877 public:
878 // Allocation. Returns a boxed value, or NULL for invalid type.
879 static oop create(BasicType type, jvalue* value, TRAPS);
880 // Accessors. Returns the basic type being boxed, or T_ILLEGAL for invalid oop.
881 static BasicType get_value(oop box, jvalue* value);
882 static BasicType set_value(oop box, jvalue* value);
883 static BasicType basic_type(oop box);
884 static bool is_instance(oop box) { return basic_type(box) != T_ILLEGAL; }
885 static bool is_instance(oop box, BasicType type) { return basic_type(box) == type; }
886 static void print(oop box, outputStream* st) { jvalue value; print(get_value(box, &value), &value, st); }
887 static void print(BasicType type, jvalue* value, outputStream* st);
888
889 static int value_offset_in_bytes(BasicType type) {
890 return ( type == T_LONG || type == T_DOUBLE ) ? long_value_offset :
891 value_offset;
892 }
893
894 // Debugging
895 friend class JavaClasses;
896 };
897
898
899
900 // Interface to java.lang.ref.Reference objects
901
902 class java_lang_ref_Reference: AllStatic {
903 public:
904 enum {
905 hc_referent_offset = 0,
906 hc_queue_offset = 1,
907 hc_next_offset = 2,
908 hc_discovered_offset = 3 // Is not last, see SoftRefs.
909 };
910 enum {
911 hc_static_lock_offset = 0,
912 hc_static_pending_offset = 1
913 };
914
915 static int referent_offset;
916 static int queue_offset;
917 static int next_offset;
918 static int discovered_offset;
919 static int static_lock_offset;
920 static int static_pending_offset;
921 static int number_of_fake_oop_fields;
922
923 // Accessors
924 static oop referent(oop ref) {
925 return ref->obj_field(referent_offset);
926 }
927 static void set_referent(oop ref, oop value) {
928 ref->obj_field_put(referent_offset, value);
929 }
930 static void set_referent_raw(oop ref, oop value) {
931 ref->obj_field_put_raw(referent_offset, value);
932 }
933 static HeapWord* referent_addr(oop ref) {
934 return ref->obj_field_addr<HeapWord>(referent_offset);
935 }
936 static oop next(oop ref) {
937 return ref->obj_field(next_offset);
938 }
939 static void set_next(oop ref, oop value) {
940 ref->obj_field_put(next_offset, value);
941 }
942 static void set_next_raw(oop ref, oop value) {
943 ref->obj_field_put_raw(next_offset, value);
944 }
945 static HeapWord* next_addr(oop ref) {
946 return ref->obj_field_addr<HeapWord>(next_offset);
947 }
948 static oop discovered(oop ref) {
949 return ref->obj_field(discovered_offset);
950 }
951 static void set_discovered(oop ref, oop value) {
952 ref->obj_field_put(discovered_offset, value);
953 }
954 static void set_discovered_raw(oop ref, oop value) {
955 ref->obj_field_put_raw(discovered_offset, value);
956 }
957 static HeapWord* discovered_addr(oop ref) {
958 return ref->obj_field_addr<HeapWord>(discovered_offset);
959 }
960 // Accessors for statics
961 static oop pending_list_lock();
962 static oop pending_list();
963
964 static HeapWord* pending_list_lock_addr();
965 static HeapWord* pending_list_addr();
966 };
967
968
969 // Interface to java.lang.ref.SoftReference objects
970
971 class java_lang_ref_SoftReference: public java_lang_ref_Reference {
972 public:
973 enum {
974 // The timestamp is a long field and may need to be adjusted for alignment.
975 hc_timestamp_offset = hc_discovered_offset + 1
976 };
977 enum {
978 hc_static_clock_offset = 0
979 };
980
981 static int timestamp_offset;
982 static int static_clock_offset;
983
984 // Accessors
985 static jlong timestamp(oop ref);
986
987 // Accessors for statics
988 static jlong clock();
989 static void set_clock(jlong value);
990 };
991
992
993 // Interface to java.lang.invoke.MethodHandle objects
994
995 class MethodHandleEntry;
996
997 class java_lang_invoke_MethodHandle: AllStatic {
998 friend class JavaClasses;
999
1000 private:
1001 static int _type_offset; // the MethodType of this MH
1002 static int _form_offset; // the LambdaForm of this MH
1003
1004 static void compute_offsets();
1005
1006 public:
1007 // Accessors
1008 static oop type(oop mh);
1009 static void set_type(oop mh, oop mtype);
1010
1011 static oop form(oop mh);
1012 static void set_form(oop mh, oop lform);
1013
1014 // Testers
1015 static bool is_subclass(Klass* klass) {
1016 return klass->is_subclass_of(SystemDictionary::MethodHandle_klass());
1017 }
1018 static bool is_instance(oop obj) {
1019 return obj != NULL && is_subclass(obj->klass());
1020 }
1021
1022 // Accessors for code generation:
1023 static int type_offset_in_bytes() { return _type_offset; }
1024 static int form_offset_in_bytes() { return _form_offset; }
1025 };
1026
1027 // Interface to java.lang.invoke.DirectMethodHandle objects
1028
1029 class java_lang_invoke_DirectMethodHandle: AllStatic {
1030 friend class JavaClasses;
1031
1032 private:
1033 static int _member_offset; // the MemberName of this DMH
1034
1035 static void compute_offsets();
1036
1037 public:
1038 // Accessors
1039 static oop member(oop mh);
1040
1041 // Testers
1042 static bool is_subclass(Klass* klass) {
1043 return klass->is_subclass_of(SystemDictionary::DirectMethodHandle_klass());
1044 }
1045 static bool is_instance(oop obj) {
1046 return obj != NULL && is_subclass(obj->klass());
1047 }
1048
1049 // Accessors for code generation:
1050 static int member_offset_in_bytes() { return _member_offset; }
1051 };
1052
1053 // Interface to java.lang.invoke.LambdaForm objects
1054 // (These are a private interface for managing adapter code generation.)
1055
1056 class java_lang_invoke_LambdaForm: AllStatic {
1057 friend class JavaClasses;
1058
1059 private:
1060 static int _vmentry_offset; // type is MemberName
1061
1062 static void compute_offsets();
1063
1064 public:
1065 // Accessors
1066 static oop vmentry(oop lform);
1067 static void set_vmentry(oop lform, oop invoker);
1068
1069 // Testers
1070 static bool is_subclass(Klass* klass) {
1071 return SystemDictionary::LambdaForm_klass() != NULL &&
1072 klass->is_subclass_of(SystemDictionary::LambdaForm_klass());
1073 }
1074 static bool is_instance(oop obj) {
1075 return obj != NULL && is_subclass(obj->klass());
1076 }
1077
1078 // Accessors for code generation:
1079 static int vmentry_offset_in_bytes() { return _vmentry_offset; }
1080 };
1081
1082
1083 // Interface to java.lang.invoke.MemberName objects
1084 // (These are a private interface for Java code to query the class hierarchy.)
1085
1086 #define MEMBERNAME_INJECTED_FIELDS(macro) \
1087 macro(java_lang_invoke_MemberName, vmloader, object_signature, false) \
1088 macro(java_lang_invoke_MemberName, vmindex, intptr_signature, false) \
1089 macro(java_lang_invoke_MemberName, vmtarget, intptr_signature, false)
1090
1091 class java_lang_invoke_MemberName: AllStatic {
1092 friend class JavaClasses;
1093
1094 private:
1095 // From java.lang.invoke.MemberName:
1096 // private Class<?> clazz; // class in which the method is defined
1097 // private String name; // may be null if not yet materialized
1098 // private Object type; // may be null if not yet materialized
1099 // private int flags; // modifier bits; see reflect.Modifier
1100 // private intptr vmtarget; // VM-specific target value
1101 // private intptr_t vmindex; // member index within class or interface
1102 static int _clazz_offset;
1103 static int _name_offset;
1104 static int _type_offset;
1105 static int _flags_offset;
1106 static int _vmtarget_offset;
1107 static int _vmloader_offset;
1108 static int _vmindex_offset;
1109
1110 static void compute_offsets();
1111
1112 public:
1113 // Accessors
1114 static oop clazz(oop mname);
1115 static void set_clazz(oop mname, oop clazz);
1116
1117 static oop type(oop mname);
1118 static void set_type(oop mname, oop type);
1119
1120 static oop name(oop mname);
1121 static void set_name(oop mname, oop name);
1122
1123 static int flags(oop mname);
1124 static void set_flags(oop mname, int flags);
1125
1126 static Metadata* vmtarget(oop mname);
1127 static void set_vmtarget(oop mname, Metadata* target);
1128 #if INCLUDE_JVMTI
1129 static void adjust_vmtarget(oop mname, Metadata* target);
1130 #endif // INCLUDE_JVMTI
1131
1132 static intptr_t vmindex(oop mname);
1133 static void set_vmindex(oop mname, intptr_t index);
1134
1135 // Testers
1136 static bool is_subclass(Klass* klass) {
1137 return klass->is_subclass_of(SystemDictionary::MemberName_klass());
1138 }
1139 static bool is_instance(oop obj) {
1140 return obj != NULL && is_subclass(obj->klass());
1141 }
1142
1143 // Relevant integer codes (keep these in synch. with MethodHandleNatives.Constants):
1144 enum {
1145 MN_IS_METHOD = 0x00010000, // method (not constructor)
1146 MN_IS_CONSTRUCTOR = 0x00020000, // constructor
1147 MN_IS_FIELD = 0x00040000, // field
1148 MN_IS_TYPE = 0x00080000, // nested type
1149 MN_CALLER_SENSITIVE = 0x00100000, // @CallerSensitive annotation detected
1150 MN_REFERENCE_KIND_SHIFT = 24, // refKind
1151 MN_REFERENCE_KIND_MASK = 0x0F000000 >> MN_REFERENCE_KIND_SHIFT,
1152 // The SEARCH_* bits are not for MN.flags but for the matchFlags argument of MHN.getMembers:
1153 MN_SEARCH_SUPERCLASSES = 0x00100000, // walk super classes
1154 MN_SEARCH_INTERFACES = 0x00200000 // walk implemented interfaces
1155 };
1156
1157 // Accessors for code generation:
1158 static int clazz_offset_in_bytes() { return _clazz_offset; }
1159 static int type_offset_in_bytes() { return _type_offset; }
1160 static int name_offset_in_bytes() { return _name_offset; }
1161 static int flags_offset_in_bytes() { return _flags_offset; }
1162 static int vmtarget_offset_in_bytes() { return _vmtarget_offset; }
1163 static int vmindex_offset_in_bytes() { return _vmindex_offset; }
1164 };
1165
1166
1167 // Interface to java.lang.invoke.MethodType objects
1168
1169 class java_lang_invoke_MethodType: AllStatic {
1170 friend class JavaClasses;
1171
1172 private:
1173 static int _rtype_offset;
1174 static int _ptypes_offset;
1175
1176 static void compute_offsets();
1177
1178 public:
1179 // Accessors
1180 static oop rtype(oop mt);
1181 static objArrayOop ptypes(oop mt);
1182
1183 static oop ptype(oop mt, int index);
1184 static int ptype_count(oop mt);
1185
1186 static int ptype_slot_count(oop mt); // extra counts for long/double
1187 static int rtype_slot_count(oop mt); // extra counts for long/double
1188
1189 static Symbol* as_signature(oop mt, bool intern_if_not_found, TRAPS);
1190 static void print_signature(oop mt, outputStream* st);
1191
1192 static bool is_instance(oop obj) {
1193 return obj != NULL && obj->klass() == SystemDictionary::MethodType_klass();
1194 }
1195
1196 static bool equals(oop mt1, oop mt2);
1197
1198 // Accessors for code generation:
1199 static int rtype_offset_in_bytes() { return _rtype_offset; }
1200 static int ptypes_offset_in_bytes() { return _ptypes_offset; }
1201 };
1202
1203
1204 // Interface to java.lang.invoke.CallSite objects
1205
1206 class java_lang_invoke_CallSite: AllStatic {
1207 friend class JavaClasses;
1208
1209 private:
1210 static int _target_offset;
1211
1212 static void compute_offsets();
1213
1214 public:
1215 // Accessors
1216 static oop target( oop site) { return site->obj_field( _target_offset); }
1217 static void set_target( oop site, oop target) { site->obj_field_put( _target_offset, target); }
1218
1219 static volatile oop target_volatile(oop site) { return oop((oopDesc *)(site->obj_field_volatile(_target_offset))); }
1220 static void set_target_volatile(oop site, oop target) { site->obj_field_put_volatile(_target_offset, target); }
1221
1222 // Testers
1223 static bool is_subclass(Klass* klass) {
1224 return klass->is_subclass_of(SystemDictionary::CallSite_klass());
1225 }
1226 static bool is_instance(oop obj) {
1227 return obj != NULL && is_subclass(obj->klass());
1228 }
1229
1230 // Accessors for code generation:
1231 static int target_offset_in_bytes() { return _target_offset; }
1232 };
1233
1234
1235 // Interface to java.security.AccessControlContext objects
1236
1237 class java_security_AccessControlContext: AllStatic {
1238 private:
1239 // Note that for this class the layout changed between JDK1.2 and JDK1.3,
1240 // so we compute the offsets at startup rather than hard-wiring them.
1241 static int _context_offset;
1242 static int _privilegedContext_offset;
1243 static int _isPrivileged_offset;
1244 static int _isAuthorized_offset;
1245
1246 static void compute_offsets();
1247 public:
1248 static oop create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS);
1249
1250 static bool is_authorized(Handle context);
1251
1252 // Debugging/initialization
1253 friend class JavaClasses;
1254 };
1255
1256
1257 // Interface to java.lang.ClassLoader objects
1258
1259 #define CLASSLOADER_INJECTED_FIELDS(macro) \
1260 macro(java_lang_ClassLoader, loader_data, intptr_signature, false)
1261
1262 class java_lang_ClassLoader : AllStatic {
1263 private:
1264 // The fake offsets are added by the class loader when java.lang.Class is loaded
1265 enum {
1266 hc_parent_offset = 0
1267 };
1268 static int _loader_data_offset;
1269 static bool offsets_computed;
1270 static int parent_offset;
1271 static int parallelCapable_offset;
1272
1273 public:
1274 static void compute_offsets();
1275
1276 static ClassLoaderData** loader_data_addr(oop loader);
1277 static ClassLoaderData* loader_data(oop loader);
1278
1279 static oop parent(oop loader);
1280 static bool isAncestor(oop loader, oop cl);
1281
1282 // Support for parallelCapable field
1283 static bool parallelCapable(oop the_class_mirror);
1284
1285 static bool is_trusted_loader(oop loader);
1286
1287 // Fix for 4474172
1288 static oop non_reflection_class_loader(oop loader);
1289
1290 // Testers
1291 static bool is_subclass(Klass* klass) {
1292 return klass->is_subclass_of(SystemDictionary::ClassLoader_klass());
1293 }
1294 static bool is_instance(oop obj) {
1295 return obj != NULL && is_subclass(obj->klass());
1296 }
1297
1298 // Debugging
1299 friend class JavaClasses;
1300 friend class ClassFileParser; // access to number_of_fake_fields
1301 };
1302
1303
1304 // Interface to java.lang.System objects
1305
1306 class java_lang_System : AllStatic {
1307 private:
1308 enum {
1309 hc_static_in_offset = 0,
1310 hc_static_out_offset = 1,
1311 hc_static_err_offset = 2,
1312 hc_static_security_offset = 3
1313 };
1314
1315 static int static_in_offset;
1316 static int static_out_offset;
1317 static int static_err_offset;
1318 static int static_security_offset;
1319
1320 public:
1321 static int in_offset_in_bytes();
1322 static int out_offset_in_bytes();
1323 static int err_offset_in_bytes();
1324
1325 static bool has_security_manager();
1326
1327 // Debugging
1328 friend class JavaClasses;
1329 };
1330
1331
1332 // Interface to java.lang.StackTraceElement objects
1333
1334 class java_lang_StackTraceElement: AllStatic {
1335 private:
1336 enum {
1337 hc_declaringClass_offset = 0,
1338 hc_methodName_offset = 1,
1339 hc_fileName_offset = 2,
1340 hc_lineNumber_offset = 3
1341 };
1342
1343 static int declaringClass_offset;
1344 static int methodName_offset;
1345 static int fileName_offset;
1346 static int lineNumber_offset;
1347
1348 public:
1349 // Setters
1350 static void set_declaringClass(oop element, oop value);
1351 static void set_methodName(oop element, oop value);
1352 static void set_fileName(oop element, oop value);
1353 static void set_lineNumber(oop element, int value);
1354
1355 // Create an instance of StackTraceElement
1356 static oop create(Handle mirror, int method, int version, int bci, TRAPS);
1357 static oop create(methodHandle method, int bci, TRAPS);
1358
1359 // Debugging
1360 friend class JavaClasses;
1361 };
1362
1363
1364 // Interface to java.lang.AssertionStatusDirectives objects
1365
1366 class java_lang_AssertionStatusDirectives: AllStatic {
1367 private:
1368 enum {
1369 hc_classes_offset,
1370 hc_classEnabled_offset,
1371 hc_packages_offset,
1372 hc_packageEnabled_offset,
1373 hc_deflt_offset
1374 };
1375
1376 static int classes_offset;
1377 static int classEnabled_offset;
1378 static int packages_offset;
1379 static int packageEnabled_offset;
1380 static int deflt_offset;
1381
1382 public:
1383 // Setters
1384 static void set_classes(oop obj, oop val);
1385 static void set_classEnabled(oop obj, oop val);
1386 static void set_packages(oop obj, oop val);
1387 static void set_packageEnabled(oop obj, oop val);
1388 static void set_deflt(oop obj, bool val);
1389 // Debugging
1390 friend class JavaClasses;
1391 };
1392
1393
1394 class java_nio_Buffer: AllStatic {
1395 private:
1396 static int _limit_offset;
1397
1398 public:
1399 static int limit_offset();
1400 static void compute_offsets();
1401 };
1402
1403 class java_util_concurrent_locks_AbstractOwnableSynchronizer : AllStatic {
1404 private:
1405 static int _owner_offset;
1406 public:
1407 static void initialize(TRAPS);
1408 static oop get_owner_threadObj(oop obj);
1409 };
1410
1411 // Use to declare fields that need to be injected into Java classes
1412 // for the JVM to use. The name_index and signature_index are
1413 // declared in vmSymbols. The may_be_java flag is used to declare
1414 // fields that might already exist in Java but should be injected if
1415 // they don't. Otherwise the field is unconditionally injected and
1416 // the JVM uses the injected one. This is to ensure that name
1417 // collisions don't occur. In general may_be_java should be false
1418 // unless there's a good reason.
1419
1420 class InjectedField {
1421 public:
1422 const SystemDictionary::WKID klass_id;
1423 const vmSymbols::SID name_index;
1424 const vmSymbols::SID signature_index;
1425 const bool may_be_java;
1426
1427
1428 Klass* klass() const { return SystemDictionary::well_known_klass(klass_id); }
1429 Symbol* name() const { return lookup_symbol(name_index); }
1430 Symbol* signature() const { return lookup_symbol(signature_index); }
1431
1432 int compute_offset();
1433
1434 // Find the Symbol for this index
1435 static Symbol* lookup_symbol(int symbol_index) {
1436 return vmSymbols::symbol_at((vmSymbols::SID)symbol_index);
1437 }
1438 };
1439
1440 #define DECLARE_INJECTED_FIELD_ENUM(klass, name, signature, may_be_java) \
1441 klass##_##name##_enum,
1442
1443 #define ALL_INJECTED_FIELDS(macro) \
1444 CLASS_INJECTED_FIELDS(macro) \
1445 CLASSLOADER_INJECTED_FIELDS(macro) \
1446 MEMBERNAME_INJECTED_FIELDS(macro)
1447
1448 // Interface to hard-coded offset checking
1449
1450 class JavaClasses : AllStatic {
1451 private:
1452
1453 static InjectedField _injected_fields[];
1454
1455 static bool check_offset(const char *klass_name, int offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1456 static bool check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1457 static bool check_constant(const char *klass_name, int constant, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1458
1459 public:
1460 enum InjectedFieldID {
1461 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD_ENUM)
1462 MAX_enum
1463 };
1464
1465 static int compute_injected_offset(InjectedFieldID id);
1466
1467 static void compute_hard_coded_offsets();
1468 static void compute_offsets();
1469 static void check_offsets() PRODUCT_RETURN;
1470
1471 static InjectedField* get_injected(Symbol* class_name, int* field_count);
1472 };
1473
1474 #undef DECLARE_INJECTED_FIELD_ENUM
1475
1476 #endif // SHARE_VM_CLASSFILE_JAVACLASSES_HPP