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
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
332 static void compute_offsets();
333
334 public:
335 static bool is_instance(oop obj);
336 static oop memberNameTable(oop obj);
337 static objArrayOop elementData(oop obj);
338 static int size(oop obj);
339 };
340
341 // Interface to java.lang.Thread objects
342
343 class java_lang_Thread : AllStatic {
344 private:
345 // Note that for this class the layout changed between JDK1.2 and JDK1.3,
346 // so we compute the offsets at startup rather than hard-wiring them.
347 static int _name_offset;
348 static int _group_offset;
349 static int _contextClassLoader_offset;
350 static int _inheritedAccessControlContext_offset;
351 static int _priority_offset;
352 static int _eetop_offset;
353 static int _daemon_offset;
354 static int _stillborn_offset;
355 static int _stackSize_offset;
356 static int _tid_offset;
357 static int _thread_status_offset;
358 static int _park_blocker_offset;
359 static int _park_event_offset ;
360
361 static void compute_offsets();
362
363 public:
364 // Instance creation
365 static oop create();
366 // Returns the JavaThread associated with the thread obj
367 static JavaThread* thread(oop java_thread);
368 // Set JavaThread for instance
369 static void set_thread(oop java_thread, JavaThread* thread);
370 // Name
371 static typeArrayOop name(oop java_thread);
372 static void set_name(oop java_thread, typeArrayOop name);
373 // Priority
374 static ThreadPriority priority(oop java_thread);
375 static void set_priority(oop java_thread, ThreadPriority priority);
376 // Thread group
377 static oop threadGroup(oop java_thread);
378 // Stillborn
379 static bool is_stillborn(oop java_thread);
380 static void set_stillborn(oop java_thread);
381 // Alive (NOTE: this is not really a field, but provides the correct
382 // definition without doing a Java call)
383 static bool is_alive(oop java_thread);
384 // Daemon
385 static bool is_daemon(oop java_thread);
386 static void set_daemon(oop java_thread);
387 // Context ClassLoader
388 static oop context_class_loader(oop java_thread);
389 // Control context
390 static oop inherited_access_control_context(oop java_thread);
391 // Stack size hint
392 static jlong stackSize(oop java_thread);
393 // Thread ID
394 static jlong thread_id(oop java_thread);
395
396 // Blocker object responsible for thread parking
397 static oop park_blocker(oop java_thread);
398
399 // Pointer to type-stable park handler, encoded as jlong.
400 // Should be set when apparently null
401 // For details, see unsafe.cpp Unsafe_Unpark
402 static jlong park_event(oop java_thread);
403 static bool set_park_event(oop java_thread, jlong ptr);
404
405 // Java Thread Status for JVMTI and M&M use.
406 // This thread status info is saved in threadStatus field of
407 // java.lang.Thread java class.
408 enum ThreadStatus {
409 NEW = 0,
410 RUNNABLE = JVMTI_THREAD_STATE_ALIVE + // runnable / running
411 JVMTI_THREAD_STATE_RUNNABLE,
412 SLEEPING = JVMTI_THREAD_STATE_ALIVE + // Thread.sleep()
413 JVMTI_THREAD_STATE_WAITING +
414 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
415 JVMTI_THREAD_STATE_SLEEPING,
416 IN_OBJECT_WAIT = JVMTI_THREAD_STATE_ALIVE + // Object.wait()
417 JVMTI_THREAD_STATE_WAITING +
418 JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
419 JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
420 IN_OBJECT_WAIT_TIMED = JVMTI_THREAD_STATE_ALIVE + // Object.wait(long)
421 JVMTI_THREAD_STATE_WAITING +
422 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
423 JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
424 PARKED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park()
425 JVMTI_THREAD_STATE_WAITING +
426 JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
427 JVMTI_THREAD_STATE_PARKED,
428 PARKED_TIMED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park(long)
429 JVMTI_THREAD_STATE_WAITING +
430 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
431 JVMTI_THREAD_STATE_PARKED,
432 BLOCKED_ON_MONITOR_ENTER = JVMTI_THREAD_STATE_ALIVE + // (re-)entering a synchronization block
433 JVMTI_THREAD_STATE_BLOCKED_ON_MONITOR_ENTER,
434 TERMINATED = JVMTI_THREAD_STATE_TERMINATED
435 };
436 // Write thread status info to threadStatus field of java.lang.Thread.
437 static void set_thread_status(oop java_thread_oop, ThreadStatus status);
438 // Read thread status info from threadStatus field of java.lang.Thread.
439 static ThreadStatus get_thread_status(oop java_thread_oop);
440
441 static const char* thread_status_name(oop java_thread_oop);
442
443 // Debugging
444 friend class JavaClasses;
445 };
446
447 // Interface to java.lang.ThreadGroup objects
448
449 class java_lang_ThreadGroup : AllStatic {
450 private:
451 static int _parent_offset;
452 static int _name_offset;
453 static int _threads_offset;
454 static int _groups_offset;
455 static int _maxPriority_offset;
456 static int _destroyed_offset;
457 static int _daemon_offset;
458 static int _vmAllowSuspension_offset;
459 static int _nthreads_offset;
460 static int _ngroups_offset;
461
462 static void compute_offsets();
463
464 public:
465 // parent ThreadGroup
466 static oop parent(oop java_thread_group);
467 // name
468 static typeArrayOop name(oop java_thread_group);
469 // ("name as oop" accessor is not necessary)
470 // Number of threads in group
471 static int nthreads(oop java_thread_group);
472 // threads
473 static objArrayOop threads(oop java_thread_group);
474 // Number of threads in group
475 static int ngroups(oop java_thread_group);
476 // groups
477 static objArrayOop groups(oop java_thread_group);
478 // maxPriority in group
479 static ThreadPriority maxPriority(oop java_thread_group);
480 // Destroyed
481 static bool is_destroyed(oop java_thread_group);
482 // Daemon
483 static bool is_daemon(oop java_thread_group);
484 // vmAllowSuspension
485 static bool is_vmAllowSuspension(oop java_thread_group);
486 // Debugging
487 friend class JavaClasses;
488 };
489
490
491
492 // Interface to java.lang.Throwable objects
493
494 class java_lang_Throwable: AllStatic {
495 friend class BacktraceBuilder;
496
497 private:
498 // Offsets
499 enum {
500 hc_backtrace_offset = 0,
501 hc_detailMessage_offset = 1,
502 hc_cause_offset = 2, // New since 1.4
503 hc_stackTrace_offset = 3 // New since 1.4
504 };
505 enum {
506 hc_static_unassigned_stacktrace_offset = 0 // New since 1.7
507 };
508 // Trace constants
509 enum {
510 trace_methods_offset = 0,
511 trace_bcis_offset = 1,
512 trace_mirrors_offset = 2,
513 trace_next_offset = 3,
514 trace_size = 4,
515 trace_chunk_size = 32
516 };
517
518 static int backtrace_offset;
519 static int detailMessage_offset;
520 static int cause_offset;
521 static int stackTrace_offset;
522 static int static_unassigned_stacktrace_offset;
523
524 // Printing
525 static char* print_stack_element_to_buffer(Handle mirror, int method, int version, int bci);
526 // StackTrace (programmatic access, new since 1.4)
527 static void clear_stacktrace(oop throwable);
528 // No stack trace available
529 static const char* no_stack_trace_message();
530 // Stacktrace (post JDK 1.7.0 to allow immutability protocol to be followed)
531 static void set_stacktrace(oop throwable, oop st_element_array);
532 static oop unassigned_stacktrace();
533
534 public:
535 // Backtrace
536 static oop backtrace(oop throwable);
537 static void set_backtrace(oop throwable, oop value);
538 // Needed by JVMTI to filter out this internal field.
539 static int get_backtrace_offset() { return backtrace_offset;}
540 static int get_detailMessage_offset() { return detailMessage_offset;}
541 // Message
542 static oop message(oop throwable);
543 static oop message(Handle throwable);
544 static void set_message(oop throwable, oop value);
545 static Symbol* detail_message(oop throwable);
546 static void print_stack_element(outputStream *st, Handle mirror, int method,
547 int version, int bci);
548 static void print_stack_element(outputStream *st, methodHandle method, int bci);
549 static void print_stack_usage(Handle stream);
550
551 // Allocate space for backtrace (created but stack trace not filled in)
552 static void allocate_backtrace(Handle throwable, TRAPS);
553 // Fill in current stack trace for throwable with preallocated backtrace (no GC)
554 static void fill_in_stack_trace_of_preallocated_backtrace(Handle throwable);
555 // Fill in current stack trace, can cause GC
556 static void fill_in_stack_trace(Handle throwable, methodHandle method, TRAPS);
557 static void fill_in_stack_trace(Handle throwable, methodHandle method = methodHandle());
558 // Programmatic access to stack trace
559 static oop get_stack_trace_element(oop throwable, int index, TRAPS);
560 static int get_stack_trace_depth(oop throwable, TRAPS);
561 // Printing
562 static void print(oop throwable, outputStream* st);
563 static void print(Handle throwable, outputStream* st);
564 static void print_stack_trace(oop throwable, outputStream* st);
565 // Debugging
566 friend class JavaClasses;
567 };
568
569
570 // Interface to java.lang.reflect.AccessibleObject objects
571
572 class java_lang_reflect_AccessibleObject: AllStatic {
573 private:
574 // Note that to reduce dependencies on the JDK we compute these
575 // offsets at run-time.
576 static int override_offset;
577
578 static void compute_offsets();
579
580 public:
581 // Accessors
582 static jboolean override(oop reflect);
583 static void set_override(oop reflect, jboolean value);
584
585 // Debugging
586 friend class JavaClasses;
587 };
588
589
590 // Interface to java.lang.reflect.Method objects
591
592 class java_lang_reflect_Method : public java_lang_reflect_AccessibleObject {
593 private:
594 // Note that to reduce dependencies on the JDK we compute these
595 // offsets at run-time.
596 static int clazz_offset;
597 static int name_offset;
598 static int returnType_offset;
599 static int parameterTypes_offset;
600 static int exceptionTypes_offset;
601 static int slot_offset;
602 static int modifiers_offset;
603 static int signature_offset;
604 static int annotations_offset;
605 static int parameter_annotations_offset;
606 static int annotation_default_offset;
607 static int type_annotations_offset;
608
609 static void compute_offsets();
610
611 public:
612 // Allocation
613 static Handle create(TRAPS);
614
615 // Accessors
616 static oop clazz(oop reflect);
617 static void set_clazz(oop reflect, oop value);
618
619 static oop name(oop method);
620 static void set_name(oop method, oop value);
621
622 static oop return_type(oop method);
623 static void set_return_type(oop method, oop value);
624
625 static oop parameter_types(oop method);
626 static void set_parameter_types(oop method, oop value);
627
628 static oop exception_types(oop method);
629 static void set_exception_types(oop method, oop value);
630
631 static int slot(oop reflect);
632 static void set_slot(oop reflect, int value);
633
634 static int modifiers(oop method);
635 static void set_modifiers(oop method, int value);
636
637 static bool has_signature_field();
638 static oop signature(oop method);
639 static void set_signature(oop method, oop value);
640
641 static bool has_annotations_field();
642 static oop annotations(oop method);
643 static void set_annotations(oop method, oop value);
644
645 static bool has_parameter_annotations_field();
646 static oop parameter_annotations(oop method);
647 static void set_parameter_annotations(oop method, oop value);
648
649 static bool has_annotation_default_field();
650 static oop annotation_default(oop method);
651 static void set_annotation_default(oop method, oop value);
652
653 static bool has_type_annotations_field();
654 static oop type_annotations(oop method);
655 static void set_type_annotations(oop method, oop value);
656
657 // Debugging
658 friend class JavaClasses;
659 };
660
661
662 // Interface to java.lang.reflect.Constructor objects
663
664 class java_lang_reflect_Constructor : 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 parameterTypes_offset;
670 static int exceptionTypes_offset;
671 static int slot_offset;
672 static int modifiers_offset;
673 static int signature_offset;
674 static int annotations_offset;
675 static int parameter_annotations_offset;
676 static int type_annotations_offset;
677
678 static void compute_offsets();
679
680 public:
681 // Allocation
682 static Handle create(TRAPS);
683
684 // Accessors
685 static oop clazz(oop reflect);
686 static void set_clazz(oop reflect, oop value);
687
688 static oop parameter_types(oop constructor);
689 static void set_parameter_types(oop constructor, oop value);
690
691 static oop exception_types(oop constructor);
692 static void set_exception_types(oop constructor, oop value);
693
694 static int slot(oop reflect);
695 static void set_slot(oop reflect, int value);
696
697 static int modifiers(oop constructor);
698 static void set_modifiers(oop constructor, int value);
699
700 static bool has_signature_field();
701 static oop signature(oop constructor);
702 static void set_signature(oop constructor, oop value);
703
704 static bool has_annotations_field();
705 static oop annotations(oop constructor);
706 static void set_annotations(oop constructor, oop value);
707
708 static bool has_parameter_annotations_field();
709 static oop parameter_annotations(oop method);
710 static void set_parameter_annotations(oop method, oop value);
711
712 static bool has_type_annotations_field();
713 static oop type_annotations(oop constructor);
714 static void set_type_annotations(oop constructor, oop value);
715
716 // Debugging
717 friend class JavaClasses;
718 };
719
720
721 // Interface to java.lang.reflect.Field objects
722
723 class java_lang_reflect_Field : public java_lang_reflect_AccessibleObject {
724 private:
725 // Note that to reduce dependencies on the JDK we compute these
726 // offsets at run-time.
727 static int clazz_offset;
728 static int name_offset;
729 static int type_offset;
730 static int slot_offset;
731 static int modifiers_offset;
732 static int signature_offset;
733 static int annotations_offset;
734 static int type_annotations_offset;
735
736 static void compute_offsets();
737
738 public:
739 // Allocation
740 static Handle create(TRAPS);
741
742 // Accessors
743 static oop clazz(oop reflect);
744 static void set_clazz(oop reflect, oop value);
745
746 static oop name(oop field);
747 static void set_name(oop field, oop value);
748
749 static oop type(oop field);
750 static void set_type(oop field, oop value);
751
752 static int slot(oop reflect);
753 static void set_slot(oop reflect, int value);
754
755 static int modifiers(oop field);
756 static void set_modifiers(oop field, int value);
757
758 static bool has_signature_field();
759 static oop signature(oop constructor);
760 static void set_signature(oop constructor, oop value);
761
762 static bool has_annotations_field();
763 static oop annotations(oop constructor);
764 static void set_annotations(oop constructor, oop value);
765
766 static bool has_parameter_annotations_field();
767 static oop parameter_annotations(oop method);
768 static void set_parameter_annotations(oop method, oop value);
769
770 static bool has_annotation_default_field();
771 static oop annotation_default(oop method);
772 static void set_annotation_default(oop method, oop value);
773
774 static bool has_type_annotations_field();
775 static oop type_annotations(oop field);
776 static void set_type_annotations(oop field, oop value);
777
778 // Debugging
779 friend class JavaClasses;
780 };
781
782 class java_lang_reflect_Parameter {
783 private:
784 // Note that to reduce dependencies on the JDK we compute these
785 // offsets at run-time.
786 static int name_offset;
787 static int modifiers_offset;
788 static int index_offset;
789 static int executable_offset;
790
791 static void compute_offsets();
792
793 public:
794 // Allocation
795 static Handle create(TRAPS);
796
797 // Accessors
798 static oop name(oop field);
799 static void set_name(oop field, oop value);
800
801 static int index(oop reflect);
802 static void set_index(oop reflect, int value);
803
804 static int modifiers(oop reflect);
805 static void set_modifiers(oop reflect, int value);
806
807 static oop executable(oop constructor);
808 static void set_executable(oop constructor, oop value);
809
810 friend class JavaClasses;
811 };
812
813 // Interface to sun.reflect.ConstantPool objects
814 class sun_reflect_ConstantPool {
815 private:
816 // Note that to reduce dependencies on the JDK we compute these
817 // offsets at run-time.
818 static int _oop_offset;
819
820 static void compute_offsets();
821
822 public:
823 // Allocation
824 static Handle create(TRAPS);
825
826 // Accessors
827 static void set_cp(oop reflect, ConstantPool* value);
828 static int oop_offset() {
829 return _oop_offset;
830 }
831
832 static ConstantPool* get_cp(oop reflect);
833
834 // Debugging
835 friend class JavaClasses;
836 };
837
838 // Interface to sun.reflect.UnsafeStaticFieldAccessorImpl objects
839 class sun_reflect_UnsafeStaticFieldAccessorImpl {
840 private:
841 static int _base_offset;
842 static void compute_offsets();
843
844 public:
845 static int base_offset() {
846 return _base_offset;
847 }
848
849 // Debugging
850 friend class JavaClasses;
851 };
852
853 // Interface to java.lang primitive type boxing objects:
854 // - java.lang.Boolean
855 // - java.lang.Character
856 // - java.lang.Float
857 // - java.lang.Double
858 // - java.lang.Byte
859 // - java.lang.Short
860 // - java.lang.Integer
861 // - java.lang.Long
862
863 // This could be separated out into 8 individual classes.
864
865 class java_lang_boxing_object: AllStatic {
866 private:
867 enum {
868 hc_value_offset = 0
869 };
870 static int value_offset;
871 static int long_value_offset;
872
873 static oop initialize_and_allocate(BasicType type, TRAPS);
874 public:
875 // Allocation. Returns a boxed value, or NULL for invalid type.
876 static oop create(BasicType type, jvalue* value, TRAPS);
877 // Accessors. Returns the basic type being boxed, or T_ILLEGAL for invalid oop.
878 static BasicType get_value(oop box, jvalue* value);
879 static BasicType set_value(oop box, jvalue* value);
880 static BasicType basic_type(oop box);
881 static bool is_instance(oop box) { return basic_type(box) != T_ILLEGAL; }
882 static bool is_instance(oop box, BasicType type) { return basic_type(box) == type; }
883 static void print(oop box, outputStream* st) { jvalue value; print(get_value(box, &value), &value, st); }
884 static void print(BasicType type, jvalue* value, outputStream* st);
885
886 static int value_offset_in_bytes(BasicType type) {
887 return ( type == T_LONG || type == T_DOUBLE ) ? long_value_offset :
888 value_offset;
889 }
890
891 // Debugging
892 friend class JavaClasses;
893 };
894
895
896
897 // Interface to java.lang.ref.Reference objects
898
899 class java_lang_ref_Reference: AllStatic {
900 public:
901 enum {
902 hc_referent_offset = 0,
903 hc_queue_offset = 1,
904 hc_next_offset = 2,
905 hc_discovered_offset = 3 // Is not last, see SoftRefs.
906 };
907 enum {
908 hc_static_lock_offset = 0,
909 hc_static_pending_offset = 1
910 };
911
912 static int referent_offset;
913 static int queue_offset;
914 static int next_offset;
915 static int discovered_offset;
916 static int static_lock_offset;
917 static int static_pending_offset;
918 static int number_of_fake_oop_fields;
919
920 // Accessors
921 static oop referent(oop ref) {
922 return ref->obj_field(referent_offset);
923 }
924 static void set_referent(oop ref, oop value) {
925 ref->obj_field_put(referent_offset, value);
926 }
927 static void set_referent_raw(oop ref, oop value) {
928 ref->obj_field_put_raw(referent_offset, value);
929 }
930 static HeapWord* referent_addr(oop ref) {
931 return ref->obj_field_addr<HeapWord>(referent_offset);
932 }
933 static oop next(oop ref) {
934 return ref->obj_field(next_offset);
935 }
936 static void set_next(oop ref, oop value) {
937 ref->obj_field_put(next_offset, value);
938 }
939 static void set_next_raw(oop ref, oop value) {
940 ref->obj_field_put_raw(next_offset, value);
941 }
942 static HeapWord* next_addr(oop ref) {
943 return ref->obj_field_addr<HeapWord>(next_offset);
944 }
945 static oop discovered(oop ref) {
946 return ref->obj_field(discovered_offset);
947 }
948 static void set_discovered(oop ref, oop value) {
949 ref->obj_field_put(discovered_offset, value);
950 }
951 static void set_discovered_raw(oop ref, oop value) {
952 ref->obj_field_put_raw(discovered_offset, value);
953 }
954 static HeapWord* discovered_addr(oop ref) {
955 return ref->obj_field_addr<HeapWord>(discovered_offset);
956 }
957 // Accessors for statics
958 static oop pending_list_lock();
959 static oop pending_list();
960
961 static HeapWord* pending_list_lock_addr();
962 static HeapWord* pending_list_addr();
963 };
964
965
966 // Interface to java.lang.ref.SoftReference objects
967
968 class java_lang_ref_SoftReference: public java_lang_ref_Reference {
969 public:
970 enum {
971 // The timestamp is a long field and may need to be adjusted for alignment.
972 hc_timestamp_offset = hc_discovered_offset + 1
973 };
974 enum {
975 hc_static_clock_offset = 0
976 };
977
978 static int timestamp_offset;
979 static int static_clock_offset;
980
981 // Accessors
982 static jlong timestamp(oop ref);
983
984 // Accessors for statics
985 static jlong clock();
986 static void set_clock(jlong value);
987 };
988
989
990 // Interface to java.lang.invoke.MethodHandle objects
991
992 class MethodHandleEntry;
993
994 class java_lang_invoke_MethodHandle: AllStatic {
995 friend class JavaClasses;
996
997 private:
998 static int _type_offset; // the MethodType of this MH
999 static int _form_offset; // the LambdaForm of this MH
1000
1001 static void compute_offsets();
1002
1003 public:
1004 // Accessors
1005 static oop type(oop mh);
1006 static void set_type(oop mh, oop mtype);
1007
1008 static oop form(oop mh);
1009 static void set_form(oop mh, oop lform);
1010
1011 // Testers
1012 static bool is_subclass(Klass* klass) {
1013 return klass->is_subclass_of(SystemDictionary::MethodHandle_klass());
1014 }
1015 static bool is_instance(oop obj) {
1016 return obj != NULL && is_subclass(obj->klass());
1017 }
1018
1019 // Accessors for code generation:
1020 static int type_offset_in_bytes() { return _type_offset; }
1021 static int form_offset_in_bytes() { return _form_offset; }
1022 };
1023
1024 // Interface to java.lang.invoke.DirectMethodHandle objects
1025
1026 class java_lang_invoke_DirectMethodHandle: AllStatic {
1027 friend class JavaClasses;
1028
1029 private:
1030 static int _member_offset; // the MemberName of this DMH
1031
1032 static void compute_offsets();
1033
1034 public:
1035 // Accessors
1036 static oop member(oop mh);
1037
1038 // Testers
1039 static bool is_subclass(Klass* klass) {
1040 return klass->is_subclass_of(SystemDictionary::DirectMethodHandle_klass());
1041 }
1042 static bool is_instance(oop obj) {
1043 return obj != NULL && is_subclass(obj->klass());
1044 }
1045
1046 // Accessors for code generation:
1047 static int member_offset_in_bytes() { return _member_offset; }
1048 };
1049
1050 // Interface to java.lang.invoke.LambdaForm objects
1051 // (These are a private interface for managing adapter code generation.)
1052
1053 class java_lang_invoke_LambdaForm: AllStatic {
1054 friend class JavaClasses;
1055
1056 private:
1057 static int _vmentry_offset; // type is MemberName
1058
1059 static void compute_offsets();
1060
1061 public:
1062 // Accessors
1063 static oop vmentry(oop lform);
1064 static void set_vmentry(oop lform, oop invoker);
1065
1066 // Testers
1067 static bool is_subclass(Klass* klass) {
1068 return SystemDictionary::LambdaForm_klass() != NULL &&
1069 klass->is_subclass_of(SystemDictionary::LambdaForm_klass());
1070 }
1071 static bool is_instance(oop obj) {
1072 return obj != NULL && is_subclass(obj->klass());
1073 }
1074
1075 // Accessors for code generation:
1076 static int vmentry_offset_in_bytes() { return _vmentry_offset; }
1077 };
1078
1079
1080 // Interface to java.lang.invoke.MemberName objects
1081 // (These are a private interface for Java code to query the class hierarchy.)
1082
1083 #define MEMBERNAME_INJECTED_FIELDS(macro) \
1084 macro(java_lang_invoke_MemberName, vmloader, object_signature, false) \
1085 macro(java_lang_invoke_MemberName, vmindex, intptr_signature, false) \
1086 macro(java_lang_invoke_MemberName, vmtarget, intptr_signature, false)
1087
1088 class java_lang_invoke_MemberName: AllStatic {
1089 friend class JavaClasses;
1090
1091 private:
1092 // From java.lang.invoke.MemberName:
1093 // private Class<?> clazz; // class in which the method is defined
1094 // private String name; // may be null if not yet materialized
1095 // private Object type; // may be null if not yet materialized
1096 // private int flags; // modifier bits; see reflect.Modifier
1097 // private intptr vmtarget; // VM-specific target value
1098 // private intptr_t vmindex; // member index within class or interface
1099 static int _clazz_offset;
1100 static int _name_offset;
1101 static int _type_offset;
1102 static int _flags_offset;
1103 static int _vmtarget_offset;
1104 static int _vmloader_offset;
1105 static int _vmindex_offset;
1106
1107 static void compute_offsets();
1108
1109 public:
1110 // Accessors
1111 static oop clazz(oop mname);
1112 static void set_clazz(oop mname, oop clazz);
1113
1114 static oop type(oop mname);
1115 static void set_type(oop mname, oop type);
1116
1117 static oop name(oop mname);
1118 static void set_name(oop mname, oop name);
1119
1120 static int flags(oop mname);
1121 static void set_flags(oop mname, int flags);
1122
1123 static Metadata* vmtarget(oop mname);
1124 static void set_vmtarget(oop mname, Metadata* target);
1125 #if INCLUDE_JVMTI
1126 static void adjust_vmtarget(oop mname, Metadata* target);
1127 #endif // INCLUDE_JVMTI
1128
1129 static intptr_t vmindex(oop mname);
1130 static void set_vmindex(oop mname, intptr_t index);
1131
1132 // Testers
1133 static bool is_subclass(Klass* klass) {
1134 return klass->is_subclass_of(SystemDictionary::MemberName_klass());
1135 }
1136 static bool is_instance(oop obj) {
1137 return obj != NULL && is_subclass(obj->klass());
1138 }
1139
1140 // Relevant integer codes (keep these in synch. with MethodHandleNatives.Constants):
1141 enum {
1142 MN_IS_METHOD = 0x00010000, // method (not constructor)
1143 MN_IS_CONSTRUCTOR = 0x00020000, // constructor
1144 MN_IS_FIELD = 0x00040000, // field
1145 MN_IS_TYPE = 0x00080000, // nested type
1146 MN_CALLER_SENSITIVE = 0x00100000, // @CallerSensitive annotation detected
1147 MN_REFERENCE_KIND_SHIFT = 24, // refKind
1148 MN_REFERENCE_KIND_MASK = 0x0F000000 >> MN_REFERENCE_KIND_SHIFT,
1149 // The SEARCH_* bits are not for MN.flags but for the matchFlags argument of MHN.getMembers:
1150 MN_SEARCH_SUPERCLASSES = 0x00100000, // walk super classes
1151 MN_SEARCH_INTERFACES = 0x00200000 // walk implemented interfaces
1152 };
1153
1154 // Accessors for code generation:
1155 static int clazz_offset_in_bytes() { return _clazz_offset; }
1156 static int type_offset_in_bytes() { return _type_offset; }
1157 static int name_offset_in_bytes() { return _name_offset; }
1158 static int flags_offset_in_bytes() { return _flags_offset; }
1159 static int vmtarget_offset_in_bytes() { return _vmtarget_offset; }
1160 static int vmindex_offset_in_bytes() { return _vmindex_offset; }
1161 };
1162
1163
1164 // Interface to java.lang.invoke.MethodType objects
1165
1166 class java_lang_invoke_MethodType: AllStatic {
1167 friend class JavaClasses;
1168
1169 private:
1170 static int _rtype_offset;
1171 static int _ptypes_offset;
1172
1173 static void compute_offsets();
1174
1175 public:
1176 // Accessors
1177 static oop rtype(oop mt);
1178 static objArrayOop ptypes(oop mt);
1179
1180 static oop ptype(oop mt, int index);
1181 static int ptype_count(oop mt);
1182
1183 static int ptype_slot_count(oop mt); // extra counts for long/double
1184 static int rtype_slot_count(oop mt); // extra counts for long/double
1185
1186 static Symbol* as_signature(oop mt, bool intern_if_not_found, TRAPS);
1187 static void print_signature(oop mt, outputStream* st);
1188
1189 static bool is_instance(oop obj) {
1190 return obj != NULL && obj->klass() == SystemDictionary::MethodType_klass();
1191 }
1192
1193 static bool equals(oop mt1, oop mt2);
1194
1195 // Accessors for code generation:
1196 static int rtype_offset_in_bytes() { return _rtype_offset; }
1197 static int ptypes_offset_in_bytes() { return _ptypes_offset; }
1198 };
1199
1200
1201 // Interface to java.lang.invoke.CallSite objects
1202
1203 class java_lang_invoke_CallSite: AllStatic {
1204 friend class JavaClasses;
1205
1206 private:
1207 static int _target_offset;
1208
1209 static void compute_offsets();
1210
1211 public:
1212 // Accessors
1213 static oop target( oop site) { return site->obj_field( _target_offset); }
1214 static void set_target( oop site, oop target) { site->obj_field_put( _target_offset, target); }
1215
1216 static volatile oop target_volatile(oop site) { return oop((oopDesc *)(site->obj_field_volatile(_target_offset))); }
1217 static void set_target_volatile(oop site, oop target) { site->obj_field_put_volatile(_target_offset, target); }
1218
1219 // Testers
1220 static bool is_subclass(Klass* klass) {
1221 return klass->is_subclass_of(SystemDictionary::CallSite_klass());
1222 }
1223 static bool is_instance(oop obj) {
1224 return obj != NULL && is_subclass(obj->klass());
1225 }
1226
1227 // Accessors for code generation:
1228 static int target_offset_in_bytes() { return _target_offset; }
1229 };
1230
1231
1232 // Interface to java.security.AccessControlContext objects
1233
1234 class java_security_AccessControlContext: AllStatic {
1235 private:
1236 // Note that for this class the layout changed between JDK1.2 and JDK1.3,
1237 // so we compute the offsets at startup rather than hard-wiring them.
1238 static int _context_offset;
1239 static int _privilegedContext_offset;
1240 static int _isPrivileged_offset;
1241 static int _isAuthorized_offset;
1242
1243 static void compute_offsets();
1244 public:
1245 static oop create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS);
1246
1247 static bool is_authorized(Handle context);
1248
1249 // Debugging/initialization
1250 friend class JavaClasses;
1251 };
1252
1253
1254 // Interface to java.lang.ClassLoader objects
1255
1256 #define CLASSLOADER_INJECTED_FIELDS(macro) \
1257 macro(java_lang_ClassLoader, loader_data, intptr_signature, false)
1258
1259 class java_lang_ClassLoader : AllStatic {
1260 private:
1261 // The fake offsets are added by the class loader when java.lang.Class is loaded
1262 enum {
1263 hc_parent_offset = 0
1264 };
1265 static int _loader_data_offset;
1266 static bool offsets_computed;
1267 static int parent_offset;
1268 static int parallelCapable_offset;
1269
1270 public:
1271 static void compute_offsets();
1272
1273 static ClassLoaderData** loader_data_addr(oop loader);
1274 static ClassLoaderData* loader_data(oop loader);
1275
1276 static oop parent(oop loader);
1277 static bool isAncestor(oop loader, oop cl);
1278
1279 // Support for parallelCapable field
1280 static bool parallelCapable(oop the_class_mirror);
1281
1282 static bool is_trusted_loader(oop loader);
1283
1284 // Fix for 4474172
1285 static oop non_reflection_class_loader(oop loader);
1286
1287 // Testers
1288 static bool is_subclass(Klass* klass) {
1289 return klass->is_subclass_of(SystemDictionary::ClassLoader_klass());
1290 }
1291 static bool is_instance(oop obj) {
1292 return obj != NULL && is_subclass(obj->klass());
1293 }
1294
1295 // Debugging
1296 friend class JavaClasses;
1297 friend class ClassFileParser; // access to number_of_fake_fields
1298 };
1299
1300
1301 // Interface to java.lang.System objects
1302
1303 class java_lang_System : AllStatic {
1304 private:
1305 enum {
1306 hc_static_in_offset = 0,
1307 hc_static_out_offset = 1,
1308 hc_static_err_offset = 2,
1309 hc_static_security_offset = 3
1310 };
1311
1312 static int static_in_offset;
1313 static int static_out_offset;
1314 static int static_err_offset;
1315 static int static_security_offset;
1316
1317 public:
1318 static int in_offset_in_bytes();
1319 static int out_offset_in_bytes();
1320 static int err_offset_in_bytes();
1321
1322 static bool has_security_manager();
1323
1324 // Debugging
1325 friend class JavaClasses;
1326 };
1327
1328
1329 // Interface to java.lang.StackTraceElement objects
1330
1331 class java_lang_StackTraceElement: AllStatic {
1332 private:
1333 enum {
1334 hc_declaringClass_offset = 0,
1335 hc_methodName_offset = 1,
1336 hc_fileName_offset = 2,
1337 hc_lineNumber_offset = 3
1338 };
1339
1340 static int declaringClass_offset;
1341 static int methodName_offset;
1342 static int fileName_offset;
1343 static int lineNumber_offset;
1344
1345 public:
1346 // Setters
1347 static void set_declaringClass(oop element, oop value);
1348 static void set_methodName(oop element, oop value);
1349 static void set_fileName(oop element, oop value);
1350 static void set_lineNumber(oop element, int value);
1351
1352 // Create an instance of StackTraceElement
1353 static oop create(Handle mirror, int method, int version, int bci, TRAPS);
1354 static oop create(methodHandle method, int bci, TRAPS);
1355
1356 // Debugging
1357 friend class JavaClasses;
1358 };
1359
1360
1361 // Interface to java.lang.AssertionStatusDirectives objects
1362
1363 class java_lang_AssertionStatusDirectives: AllStatic {
1364 private:
1365 enum {
1366 hc_classes_offset,
1367 hc_classEnabled_offset,
1368 hc_packages_offset,
1369 hc_packageEnabled_offset,
1370 hc_deflt_offset
1371 };
1372
1373 static int classes_offset;
1374 static int classEnabled_offset;
1375 static int packages_offset;
1376 static int packageEnabled_offset;
1377 static int deflt_offset;
1378
1379 public:
1380 // Setters
1381 static void set_classes(oop obj, oop val);
1382 static void set_classEnabled(oop obj, oop val);
1383 static void set_packages(oop obj, oop val);
1384 static void set_packageEnabled(oop obj, oop val);
1385 static void set_deflt(oop obj, bool val);
1386 // Debugging
1387 friend class JavaClasses;
1388 };
1389
1390
1391 class java_nio_Buffer: AllStatic {
1392 private:
1393 static int _limit_offset;
1394
1395 public:
1396 static int limit_offset();
1397 static void compute_offsets();
1398 };
1399
1400 class java_util_concurrent_locks_AbstractOwnableSynchronizer : AllStatic {
1401 private:
1402 static int _owner_offset;
1403 public:
1404 static void initialize(TRAPS);
1405 static oop get_owner_threadObj(oop obj);
1406 };
1407
1408 // Use to declare fields that need to be injected into Java classes
1409 // for the JVM to use. The name_index and signature_index are
1410 // declared in vmSymbols. The may_be_java flag is used to declare
1411 // fields that might already exist in Java but should be injected if
1412 // they don't. Otherwise the field is unconditionally injected and
1413 // the JVM uses the injected one. This is to ensure that name
1414 // collisions don't occur. In general may_be_java should be false
1415 // unless there's a good reason.
1416
1417 class InjectedField {
1418 public:
1419 const SystemDictionary::WKID klass_id;
1420 const vmSymbols::SID name_index;
1421 const vmSymbols::SID signature_index;
1422 const bool may_be_java;
1423
1424
1425 Klass* klass() const { return SystemDictionary::well_known_klass(klass_id); }
1426 Symbol* name() const { return lookup_symbol(name_index); }
1427 Symbol* signature() const { return lookup_symbol(signature_index); }
1428
1429 int compute_offset();
1430
1431 // Find the Symbol for this index
1432 static Symbol* lookup_symbol(int symbol_index) {
1433 return vmSymbols::symbol_at((vmSymbols::SID)symbol_index);
1434 }
1435 };
1436
1437 #define DECLARE_INJECTED_FIELD_ENUM(klass, name, signature, may_be_java) \
1438 klass##_##name##_enum,
1439
1440 #define ALL_INJECTED_FIELDS(macro) \
1441 CLASS_INJECTED_FIELDS(macro) \
1442 CLASSLOADER_INJECTED_FIELDS(macro) \
1443 MEMBERNAME_INJECTED_FIELDS(macro)
1444
1445 // Interface to hard-coded offset checking
1446
1447 class JavaClasses : AllStatic {
1448 private:
1449
1450 static InjectedField _injected_fields[];
1451
1452 static bool check_offset(const char *klass_name, int offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1453 static bool check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1454 static bool check_constant(const char *klass_name, int constant, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1455
1456 public:
1457 enum InjectedFieldID {
1458 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD_ENUM)
1459 MAX_enum
1460 };
1461
1462 static int compute_injected_offset(InjectedFieldID id);
1463
1464 static void compute_hard_coded_offsets();
1465 static void compute_offsets();
1466 static void check_offsets() PRODUCT_RETURN;
1467
1468 static InjectedField* get_injected(Symbol* class_name, int* field_count);
1469 };
1470
1471 #undef DECLARE_INJECTED_FIELD_ENUM
1472
1473 #endif // SHARE_VM_CLASSFILE_JAVACLASSES_HPP