1 /*
2 * Copyright (c) 1997, 2015, 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_raw(oop string, typeArrayOop buffer) {
122 assert(initialized, "Must be initialized");
123 string->obj_field_put_raw(value_offset, buffer);
124 }
125 static void set_value(oop string, typeArrayOop buffer) {
126 assert(initialized && (value_offset > 0), "Must be initialized");
127 string->obj_field_put(value_offset, (oop)buffer);
128 }
129 static void set_hash(oop string, unsigned int hash) {
130 assert(initialized && (hash_offset > 0), "Must be initialized");
131 string->int_field_put(hash_offset, hash);
132 }
133
134 // Accessors
135 static typeArrayOop value(oop java_string) {
136 assert(initialized && (value_offset > 0), "Must be initialized");
137 assert(is_instance(java_string), "must be java_string");
138 return (typeArrayOop) java_string->obj_field(value_offset);
139 }
140 static unsigned int hash(oop java_string) {
141 assert(initialized && (hash_offset > 0), "Must be initialized");
142 assert(is_instance(java_string), "must be java_string");
143 return java_string->int_field(hash_offset);
144 }
145 static int offset(oop java_string) {
146 assert(initialized, "Must be initialized");
147 assert(is_instance(java_string), "must be java_string");
148 if (offset_offset > 0) {
149 return java_string->int_field(offset_offset);
150 } else {
151 return 0;
152 }
153 }
154 static int length(oop java_string) {
155 assert(initialized, "Must be initialized");
156 assert(is_instance(java_string), "must be java_string");
157 if (count_offset > 0) {
158 return java_string->int_field(count_offset);
159 } else {
160 return ((typeArrayOop)java_string->obj_field(value_offset))->length();
161 }
162 }
163 static int utf8_length(oop java_string);
164
165 // String converters
166 static char* as_utf8_string(oop java_string);
167 static char* as_utf8_string(oop java_string, char* buf, int buflen);
168 static char* as_utf8_string(oop java_string, int start, int len);
169 static char* as_utf8_string(oop java_string, int start, int len, char* buf, int buflen);
170 static char* as_platform_dependent_str(Handle java_string, TRAPS);
171 static jchar* as_unicode_string(oop java_string, int& length, TRAPS);
172 // produce an ascii string with all other values quoted using \u####
173 static char* as_quoted_ascii(oop java_string);
174
175 // Compute the hash value for a java.lang.String object which would
176 // contain the characters passed in.
177 //
178 // As the hash value used by the String object itself, in
179 // String.hashCode(). This value is normally calculated in Java code
180 // in the String.hashCode method(), but is precomputed for String
181 // objects in the shared archive file.
182 // hash P(31) from Kernighan & Ritchie
183 //
184 // For this reason, THIS ALGORITHM MUST MATCH String.hashCode().
185 template <typename T> static unsigned int hash_code(T* s, int len) {
186 unsigned int h = 0;
187 while (len-- > 0) {
188 h = 31*h + (unsigned int) *s;
189 s++;
190 }
191 return h;
192 }
193 static unsigned int hash_code(oop java_string);
194
195 // This is the string hash code used by the StringTable, which may be
196 // the same as String.hashCode or an alternate hash code.
197 static unsigned int hash_string(oop java_string);
198
199 static bool equals(oop java_string, jchar* chars, int len);
200 static bool equals(oop str1, oop str2);
201
202 // Conversion between '.' and '/' formats
203 static Handle externalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '/', '.', THREAD); }
204 static Handle internalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '.', '/', THREAD); }
205
206 // Conversion
207 static Symbol* as_symbol(Handle java_string, TRAPS);
208 static Symbol* as_symbol_or_null(oop java_string);
209
210 // Testers
211 static bool is_instance(oop obj);
212 static bool is_instance_inlined(oop obj);
213
214 // Debugging
215 static void print(oop java_string, outputStream* st);
216 friend class JavaClasses;
217 friend class StringTable;
218 };
219
220
221 // Interface to java.lang.Class objects
222
223 #define CLASS_INJECTED_FIELDS(macro) \
224 macro(java_lang_Class, klass, intptr_signature, false) \
225 macro(java_lang_Class, array_klass, intptr_signature, false) \
226 macro(java_lang_Class, oop_size, int_signature, false) \
227 macro(java_lang_Class, static_oop_field_count, int_signature, false) \
228 macro(java_lang_Class, protection_domain, object_signature, false) \
229 macro(java_lang_Class, signers, object_signature, false)
230
231 class java_lang_Class : AllStatic {
232 friend class VMStructs;
233
234 private:
235 // The fake offsets are added by the class loader when java.lang.Class is loaded
236
237 static int _klass_offset;
238 static int _array_klass_offset;
239
240 static int _oop_size_offset;
241 static int _static_oop_field_count_offset;
242
243 static int _protection_domain_offset;
244 static int _init_lock_offset;
245 static int _signers_offset;
246 static int _class_loader_offset;
247 static int _component_mirror_offset;
248
249 static bool offsets_computed;
250 static int classRedefinedCount_offset;
251
252 static GrowableArray<Klass*>* _fixup_mirror_list;
253
254 static void set_init_lock(oop java_class, oop init_lock);
255 static void set_protection_domain(oop java_class, oop protection_domain);
256 static void set_class_loader(oop java_class, oop class_loader);
257 static void set_component_mirror(oop java_class, oop comp_mirror);
258 static void initialize_mirror_fields(KlassHandle k, Handle mirror, Handle protection_domain, TRAPS);
259 public:
260 static void compute_offsets();
261
262 // Instance creation
263 static void create_mirror(KlassHandle k, Handle class_loader,
264 Handle protection_domain, TRAPS);
265 static void fixup_mirror(KlassHandle k, TRAPS);
266 static oop create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS);
267 // Conversion
268 static Klass* as_Klass(oop java_class);
269 static void set_klass(oop java_class, Klass* klass);
270 static BasicType as_BasicType(oop java_class, Klass** reference_klass = NULL);
271 static BasicType as_BasicType(oop java_class, KlassHandle* reference_klass) {
272 Klass* refk_oop = NULL;
273 BasicType result = as_BasicType(java_class, &refk_oop);
274 (*reference_klass) = KlassHandle(refk_oop);
275 return result;
276 }
277 static Symbol* as_signature(oop java_class, bool intern_if_not_found, TRAPS);
278 static void print_signature(oop java_class, outputStream *st);
279 static const char* as_external_name(oop java_class);
280 // Testing
281 static bool is_instance(oop obj);
282
283 static bool is_primitive(oop java_class);
284 static BasicType primitive_type(oop java_class);
285 static oop primitive_mirror(BasicType t);
286 // JVM_NewArray support
287 static Klass* array_klass(oop java_class);
288 static void set_array_klass(oop java_class, Klass* klass);
289 // compiler support for class operations
290 static int klass_offset_in_bytes() { return _klass_offset; }
291 static int array_klass_offset_in_bytes() { return _array_klass_offset; }
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 // Interface to java.lang.Thread objects
323
324 class java_lang_Thread : AllStatic {
325 private:
326 // Note that for this class the layout changed between JDK1.2 and JDK1.3,
327 // so we compute the offsets at startup rather than hard-wiring them.
328 static int _name_offset;
329 static int _group_offset;
330 static int _contextClassLoader_offset;
331 static int _inheritedAccessControlContext_offset;
332 static int _priority_offset;
333 static int _eetop_offset;
334 static int _daemon_offset;
335 static int _stillborn_offset;
336 static int _stackSize_offset;
337 static int _tid_offset;
338 static int _thread_status_offset;
339 static int _park_blocker_offset;
340 static int _park_event_offset ;
341
342 static void compute_offsets();
343
344 public:
345 // Instance creation
346 static oop create();
347 // Returns the JavaThread associated with the thread obj
348 static JavaThread* thread(oop java_thread);
349 // Set JavaThread for instance
350 static void set_thread(oop java_thread, JavaThread* thread);
351 // Name
352 static oop name(oop java_thread);
353 static void set_name(oop java_thread, oop name);
354 // Priority
355 static ThreadPriority priority(oop java_thread);
356 static void set_priority(oop java_thread, ThreadPriority priority);
357 // Thread group
358 static oop threadGroup(oop java_thread);
359 // Stillborn
360 static bool is_stillborn(oop java_thread);
361 static void set_stillborn(oop java_thread);
362 // Alive (NOTE: this is not really a field, but provides the correct
363 // definition without doing a Java call)
364 static bool is_alive(oop java_thread);
365 // Daemon
366 static bool is_daemon(oop java_thread);
367 static void set_daemon(oop java_thread);
368 // Context ClassLoader
369 static oop context_class_loader(oop java_thread);
370 // Control context
371 static oop inherited_access_control_context(oop java_thread);
372 // Stack size hint
373 static jlong stackSize(oop java_thread);
374 // Thread ID
375 static jlong thread_id(oop java_thread);
376
377 // Blocker object responsible for thread parking
378 static oop park_blocker(oop java_thread);
379
380 // Pointer to type-stable park handler, encoded as jlong.
381 // Should be set when apparently null
382 // For details, see unsafe.cpp Unsafe_Unpark
383 static jlong park_event(oop java_thread);
384 static bool set_park_event(oop java_thread, jlong ptr);
385
386 // Java Thread Status for JVMTI and M&M use.
387 // This thread status info is saved in threadStatus field of
388 // java.lang.Thread java class.
389 enum ThreadStatus {
390 NEW = 0,
391 RUNNABLE = JVMTI_THREAD_STATE_ALIVE + // runnable / running
392 JVMTI_THREAD_STATE_RUNNABLE,
393 SLEEPING = JVMTI_THREAD_STATE_ALIVE + // Thread.sleep()
394 JVMTI_THREAD_STATE_WAITING +
395 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
396 JVMTI_THREAD_STATE_SLEEPING,
397 IN_OBJECT_WAIT = JVMTI_THREAD_STATE_ALIVE + // Object.wait()
398 JVMTI_THREAD_STATE_WAITING +
399 JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
400 JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
401 IN_OBJECT_WAIT_TIMED = JVMTI_THREAD_STATE_ALIVE + // Object.wait(long)
402 JVMTI_THREAD_STATE_WAITING +
403 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
404 JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
405 PARKED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park()
406 JVMTI_THREAD_STATE_WAITING +
407 JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
408 JVMTI_THREAD_STATE_PARKED,
409 PARKED_TIMED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park(long)
410 JVMTI_THREAD_STATE_WAITING +
411 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
412 JVMTI_THREAD_STATE_PARKED,
413 BLOCKED_ON_MONITOR_ENTER = JVMTI_THREAD_STATE_ALIVE + // (re-)entering a synchronization block
414 JVMTI_THREAD_STATE_BLOCKED_ON_MONITOR_ENTER,
415 TERMINATED = JVMTI_THREAD_STATE_TERMINATED
416 };
417 // Write thread status info to threadStatus field of java.lang.Thread.
418 static void set_thread_status(oop java_thread_oop, ThreadStatus status);
419 // Read thread status info from threadStatus field of java.lang.Thread.
420 static ThreadStatus get_thread_status(oop java_thread_oop);
421
422 static const char* thread_status_name(oop java_thread_oop);
423
424 // Debugging
425 friend class JavaClasses;
426 };
427
428 // Interface to java.lang.ThreadGroup objects
429
430 class java_lang_ThreadGroup : AllStatic {
431 private:
432 static int _parent_offset;
433 static int _name_offset;
434 static int _threads_offset;
435 static int _groups_offset;
436 static int _maxPriority_offset;
437 static int _destroyed_offset;
438 static int _daemon_offset;
439 static int _vmAllowSuspension_offset;
440 static int _nthreads_offset;
441 static int _ngroups_offset;
442
443 static void compute_offsets();
444
445 public:
446 // parent ThreadGroup
447 static oop parent(oop java_thread_group);
448 // name
449 static typeArrayOop name(oop java_thread_group);
450 // ("name as oop" accessor is not necessary)
451 // Number of threads in group
452 static int nthreads(oop java_thread_group);
453 // threads
454 static objArrayOop threads(oop java_thread_group);
455 // Number of threads in group
456 static int ngroups(oop java_thread_group);
457 // groups
458 static objArrayOop groups(oop java_thread_group);
459 // maxPriority in group
460 static ThreadPriority maxPriority(oop java_thread_group);
461 // Destroyed
462 static bool is_destroyed(oop java_thread_group);
463 // Daemon
464 static bool is_daemon(oop java_thread_group);
465 // vmAllowSuspension
466 static bool is_vmAllowSuspension(oop java_thread_group);
467 // Debugging
468 friend class JavaClasses;
469 };
470
471
472
473 // Interface to java.lang.Throwable objects
474
475 class java_lang_Throwable: AllStatic {
476 friend class BacktraceBuilder;
477
478 private:
479 // Offsets
480 enum {
481 hc_backtrace_offset = 0,
482 hc_detailMessage_offset = 1,
483 hc_cause_offset = 2, // New since 1.4
484 hc_stackTrace_offset = 3 // New since 1.4
485 };
486 enum {
487 hc_static_unassigned_stacktrace_offset = 0 // New since 1.7
488 };
489 // Trace constants
490 enum {
491 trace_methods_offset = 0,
492 trace_bcis_offset = 1,
493 trace_mirrors_offset = 2,
494 trace_cprefs_offset = 3,
495 trace_next_offset = 4,
496 trace_size = 5,
497 trace_chunk_size = 32
498 };
499
500 static int backtrace_offset;
501 static int detailMessage_offset;
502 static int cause_offset;
503 static int stackTrace_offset;
504 static int static_unassigned_stacktrace_offset;
505
506 // Printing
507 static char* print_stack_element_to_buffer(Handle mirror, int method, int version, int bci, int cpref);
508 // StackTrace (programmatic access, new since 1.4)
509 static void clear_stacktrace(oop throwable);
510 // No stack trace available
511 static const char* no_stack_trace_message();
512 // Stacktrace (post JDK 1.7.0 to allow immutability protocol to be followed)
513 static void set_stacktrace(oop throwable, oop st_element_array);
514 static oop unassigned_stacktrace();
515
516 public:
517 // Backtrace
518 static oop backtrace(oop throwable);
519 static void set_backtrace(oop throwable, oop value);
520 // Needed by JVMTI to filter out this internal field.
521 static int get_backtrace_offset() { return backtrace_offset;}
522 static int get_detailMessage_offset() { return detailMessage_offset;}
523 // Message
524 static oop message(oop throwable);
525 static oop message(Handle throwable);
526 static void set_message(oop throwable, oop value);
527 static Symbol* detail_message(oop throwable);
528 static void print_stack_element(outputStream *st, Handle mirror, int method,
529 int version, int bci, int cpref);
530 static void print_stack_element(outputStream *st, methodHandle method, int bci);
531 static void print_stack_usage(Handle stream);
532
533 // Allocate space for backtrace (created but stack trace not filled in)
534 static void allocate_backtrace(Handle throwable, TRAPS);
535 // Fill in current stack trace for throwable with preallocated backtrace (no GC)
536 static void fill_in_stack_trace_of_preallocated_backtrace(Handle throwable);
537 // Fill in current stack trace, can cause GC
538 static void fill_in_stack_trace(Handle throwable, methodHandle method, TRAPS);
539 static void fill_in_stack_trace(Handle throwable, methodHandle method = methodHandle());
540 // Programmatic access to stack trace
541 static oop get_stack_trace_element(oop throwable, int index, TRAPS);
542 static int get_stack_trace_depth(oop throwable, TRAPS);
543 // Printing
544 static void print(oop throwable, outputStream* st);
545 static void print(Handle throwable, outputStream* st);
546 static void print_stack_trace(oop throwable, outputStream* st);
547 // Debugging
548 friend class JavaClasses;
549 };
550
551
552 // Interface to java.lang.reflect.AccessibleObject objects
553
554 class java_lang_reflect_AccessibleObject: AllStatic {
555 private:
556 // Note that to reduce dependencies on the JDK we compute these
557 // offsets at run-time.
558 static int override_offset;
559
560 static void compute_offsets();
561
562 public:
563 // Accessors
564 static jboolean override(oop reflect);
565 static void set_override(oop reflect, jboolean value);
566
567 // Debugging
568 friend class JavaClasses;
569 };
570
571
572 // Interface to java.lang.reflect.Method objects
573
574 class java_lang_reflect_Method : public java_lang_reflect_AccessibleObject {
575 private:
576 // Note that to reduce dependencies on the JDK we compute these
577 // offsets at run-time.
578 static int clazz_offset;
579 static int name_offset;
580 static int returnType_offset;
581 static int parameterTypes_offset;
582 static int exceptionTypes_offset;
583 static int slot_offset;
584 static int modifiers_offset;
585 static int signature_offset;
586 static int annotations_offset;
587 static int parameter_annotations_offset;
588 static int annotation_default_offset;
589 static int type_annotations_offset;
590
591 static void compute_offsets();
592
593 public:
594 // Allocation
595 static Handle create(TRAPS);
596
597 // Accessors
598 static oop clazz(oop reflect);
599 static void set_clazz(oop reflect, oop value);
600
601 static oop name(oop method);
602 static void set_name(oop method, oop value);
603
604 static oop return_type(oop method);
605 static void set_return_type(oop method, oop value);
606
607 static oop parameter_types(oop method);
608 static void set_parameter_types(oop method, oop value);
609
610 static oop exception_types(oop method);
611 static void set_exception_types(oop method, oop value);
612
613 static int slot(oop reflect);
614 static void set_slot(oop reflect, int value);
615
616 static int modifiers(oop method);
617 static void set_modifiers(oop method, int value);
618
619 static bool has_signature_field();
620 static oop signature(oop method);
621 static void set_signature(oop method, oop value);
622
623 static bool has_annotations_field();
624 static oop annotations(oop method);
625 static void set_annotations(oop method, oop value);
626
627 static bool has_parameter_annotations_field();
628 static oop parameter_annotations(oop method);
629 static void set_parameter_annotations(oop method, oop value);
630
631 static bool has_annotation_default_field();
632 static oop annotation_default(oop method);
633 static void set_annotation_default(oop method, oop value);
634
635 static bool has_type_annotations_field();
636 static oop type_annotations(oop method);
637 static void set_type_annotations(oop method, oop value);
638
639 // Debugging
640 friend class JavaClasses;
641 };
642
643
644 // Interface to java.lang.reflect.Constructor objects
645
646 class java_lang_reflect_Constructor : public java_lang_reflect_AccessibleObject {
647 private:
648 // Note that to reduce dependencies on the JDK we compute these
649 // offsets at run-time.
650 static int clazz_offset;
651 static int parameterTypes_offset;
652 static int exceptionTypes_offset;
653 static int slot_offset;
654 static int modifiers_offset;
655 static int signature_offset;
656 static int annotations_offset;
657 static int parameter_annotations_offset;
658 static int type_annotations_offset;
659
660 static void compute_offsets();
661
662 public:
663 // Allocation
664 static Handle create(TRAPS);
665
666 // Accessors
667 static oop clazz(oop reflect);
668 static void set_clazz(oop reflect, oop value);
669
670 static oop parameter_types(oop constructor);
671 static void set_parameter_types(oop constructor, oop value);
672
673 static oop exception_types(oop constructor);
674 static void set_exception_types(oop constructor, oop value);
675
676 static int slot(oop reflect);
677 static void set_slot(oop reflect, int value);
678
679 static int modifiers(oop constructor);
680 static void set_modifiers(oop constructor, int value);
681
682 static bool has_signature_field();
683 static oop signature(oop constructor);
684 static void set_signature(oop constructor, oop value);
685
686 static bool has_annotations_field();
687 static oop annotations(oop constructor);
688 static void set_annotations(oop constructor, oop value);
689
690 static bool has_parameter_annotations_field();
691 static oop parameter_annotations(oop method);
692 static void set_parameter_annotations(oop method, oop value);
693
694 static bool has_type_annotations_field();
695 static oop type_annotations(oop constructor);
696 static void set_type_annotations(oop constructor, oop value);
697
698 // Debugging
699 friend class JavaClasses;
700 };
701
702
703 // Interface to java.lang.reflect.Field objects
704
705 class java_lang_reflect_Field : public java_lang_reflect_AccessibleObject {
706 private:
707 // Note that to reduce dependencies on the JDK we compute these
708 // offsets at run-time.
709 static int clazz_offset;
710 static int name_offset;
711 static int type_offset;
712 static int slot_offset;
713 static int modifiers_offset;
714 static int signature_offset;
715 static int annotations_offset;
716 static int type_annotations_offset;
717
718 static void compute_offsets();
719
720 public:
721 // Allocation
722 static Handle create(TRAPS);
723
724 // Accessors
725 static oop clazz(oop reflect);
726 static void set_clazz(oop reflect, oop value);
727
728 static oop name(oop field);
729 static void set_name(oop field, oop value);
730
731 static oop type(oop field);
732 static void set_type(oop field, oop value);
733
734 static int slot(oop reflect);
735 static void set_slot(oop reflect, int value);
736
737 static int modifiers(oop field);
738 static void set_modifiers(oop field, int value);
739
740 static bool has_signature_field();
741 static oop signature(oop constructor);
742 static void set_signature(oop constructor, oop value);
743
744 static bool has_annotations_field();
745 static oop annotations(oop constructor);
746 static void set_annotations(oop constructor, oop value);
747
748 static bool has_parameter_annotations_field();
749 static oop parameter_annotations(oop method);
750 static void set_parameter_annotations(oop method, oop value);
751
752 static bool has_annotation_default_field();
753 static oop annotation_default(oop method);
754 static void set_annotation_default(oop method, oop value);
755
756 static bool has_type_annotations_field();
757 static oop type_annotations(oop field);
758 static void set_type_annotations(oop field, oop value);
759
760 // Debugging
761 friend class JavaClasses;
762 };
763
764 class java_lang_reflect_Parameter {
765 private:
766 // Note that to reduce dependencies on the JDK we compute these
767 // offsets at run-time.
768 static int name_offset;
769 static int modifiers_offset;
770 static int index_offset;
771 static int executable_offset;
772
773 static void compute_offsets();
774
775 public:
776 // Allocation
777 static Handle create(TRAPS);
778
779 // Accessors
780 static oop name(oop field);
781 static void set_name(oop field, oop value);
782
783 static int index(oop reflect);
784 static void set_index(oop reflect, int value);
785
786 static int modifiers(oop reflect);
787 static void set_modifiers(oop reflect, int value);
788
789 static oop executable(oop constructor);
790 static void set_executable(oop constructor, oop value);
791
792 friend class JavaClasses;
793 };
794
795 // Interface to sun.reflect.ConstantPool objects
796 class sun_reflect_ConstantPool {
797 private:
798 // Note that to reduce dependencies on the JDK we compute these
799 // offsets at run-time.
800 static int _oop_offset;
801
802 static void compute_offsets();
803
804 public:
805 // Allocation
806 static Handle create(TRAPS);
807
808 // Accessors
809 static void set_cp(oop reflect, ConstantPool* value);
810 static int oop_offset() {
811 return _oop_offset;
812 }
813
814 static ConstantPool* get_cp(oop reflect);
815
816 // Debugging
817 friend class JavaClasses;
818 };
819
820 // Interface to sun.reflect.UnsafeStaticFieldAccessorImpl objects
821 class sun_reflect_UnsafeStaticFieldAccessorImpl {
822 private:
823 static int _base_offset;
824 static void compute_offsets();
825
826 public:
827 static int base_offset() {
828 return _base_offset;
829 }
830
831 // Debugging
832 friend class JavaClasses;
833 };
834
835 // Interface to java.lang primitive type boxing objects:
836 // - java.lang.Boolean
837 // - java.lang.Character
838 // - java.lang.Float
839 // - java.lang.Double
840 // - java.lang.Byte
841 // - java.lang.Short
842 // - java.lang.Integer
843 // - java.lang.Long
844
845 // This could be separated out into 8 individual classes.
846
847 class java_lang_boxing_object: AllStatic {
848 private:
849 enum {
850 hc_value_offset = 0
851 };
852 static int value_offset;
853 static int long_value_offset;
854
855 static oop initialize_and_allocate(BasicType type, TRAPS);
856 public:
857 // Allocation. Returns a boxed value, or NULL for invalid type.
858 static oop create(BasicType type, jvalue* value, TRAPS);
859 // Accessors. Returns the basic type being boxed, or T_ILLEGAL for invalid oop.
860 static BasicType get_value(oop box, jvalue* value);
861 static BasicType set_value(oop box, jvalue* value);
862 static BasicType basic_type(oop box);
863 static bool is_instance(oop box) { return basic_type(box) != T_ILLEGAL; }
864 static bool is_instance(oop box, BasicType type) { return basic_type(box) == type; }
865 static void print(oop box, outputStream* st) { jvalue value; print(get_value(box, &value), &value, st); }
866 static void print(BasicType type, jvalue* value, outputStream* st);
867
868 static int value_offset_in_bytes(BasicType type) {
869 return ( type == T_LONG || type == T_DOUBLE ) ? long_value_offset :
870 value_offset;
871 }
872
873 // Debugging
874 friend class JavaClasses;
875 };
876
877
878
879 // Interface to java.lang.ref.Reference objects
880
881 class java_lang_ref_Reference: AllStatic {
882 public:
883 enum {
884 hc_referent_offset = 0,
885 hc_queue_offset = 1,
886 hc_next_offset = 2,
887 hc_discovered_offset = 3 // Is not last, see SoftRefs.
888 };
889 enum {
890 hc_static_lock_offset = 0,
891 hc_static_pending_offset = 1
892 };
893
894 static int referent_offset;
895 static int queue_offset;
896 static int next_offset;
897 static int discovered_offset;
898 static int static_lock_offset;
899 static int static_pending_offset;
900 static int number_of_fake_oop_fields;
901
902 // Accessors
903 static oop referent(oop ref) {
904 return ref->obj_field(referent_offset);
905 }
906 static void set_referent(oop ref, oop value) {
907 ref->obj_field_put(referent_offset, value);
908 }
909 static void set_referent_raw(oop ref, oop value) {
910 ref->obj_field_put_raw(referent_offset, value);
911 }
912 static HeapWord* referent_addr(oop ref) {
913 return ref->obj_field_addr<HeapWord>(referent_offset);
914 }
915 static oop next(oop ref) {
916 return ref->obj_field(next_offset);
917 }
918 static void set_next(oop ref, oop value) {
919 ref->obj_field_put(next_offset, value);
920 }
921 static void set_next_raw(oop ref, oop value) {
922 ref->obj_field_put_raw(next_offset, value);
923 }
924 static HeapWord* next_addr(oop ref) {
925 return ref->obj_field_addr<HeapWord>(next_offset);
926 }
927 static oop discovered(oop ref) {
928 return ref->obj_field(discovered_offset);
929 }
930 static void set_discovered(oop ref, oop value) {
931 ref->obj_field_put(discovered_offset, value);
932 }
933 static void set_discovered_raw(oop ref, oop value) {
934 ref->obj_field_put_raw(discovered_offset, value);
935 }
936 static HeapWord* discovered_addr(oop ref) {
937 return ref->obj_field_addr<HeapWord>(discovered_offset);
938 }
939 // Accessors for statics
940 static oop pending_list_lock();
941 static oop pending_list();
942
943 static HeapWord* pending_list_lock_addr();
944 static HeapWord* pending_list_addr();
945 };
946
947
948 // Interface to java.lang.ref.SoftReference objects
949
950 class java_lang_ref_SoftReference: public java_lang_ref_Reference {
951 public:
952 enum {
953 // The timestamp is a long field and may need to be adjusted for alignment.
954 hc_timestamp_offset = hc_discovered_offset + 1
955 };
956 enum {
957 hc_static_clock_offset = 0
958 };
959
960 static int timestamp_offset;
961 static int static_clock_offset;
962
963 // Accessors
964 static jlong timestamp(oop ref);
965
966 // Accessors for statics
967 static jlong clock();
968 static void set_clock(jlong value);
969 };
970
971 // Interface to java.lang.invoke.MethodHandle objects
972
973 class MethodHandleEntry;
974
975 class java_lang_invoke_MethodHandle: AllStatic {
976 friend class JavaClasses;
977
978 private:
979 static int _type_offset; // the MethodType of this MH
980 static int _form_offset; // the LambdaForm of this MH
981
982 static void compute_offsets();
983
984 public:
985 // Accessors
986 static oop type(oop mh);
987 static void set_type(oop mh, oop mtype);
988
989 static oop form(oop mh);
990 static void set_form(oop mh, oop lform);
991
992 // Testers
993 static bool is_subclass(Klass* klass) {
994 return klass->is_subclass_of(SystemDictionary::MethodHandle_klass());
995 }
996 static bool is_instance(oop obj);
997
998 // Accessors for code generation:
999 static int type_offset_in_bytes() { return _type_offset; }
1000 static int form_offset_in_bytes() { return _form_offset; }
1001 };
1002
1003 // Interface to java.lang.invoke.DirectMethodHandle objects
1004
1005 class java_lang_invoke_DirectMethodHandle: AllStatic {
1006 friend class JavaClasses;
1007
1008 private:
1009 static int _member_offset; // the MemberName of this DMH
1010
1011 static void compute_offsets();
1012
1013 public:
1014 // Accessors
1015 static oop member(oop mh);
1016
1017 // Testers
1018 static bool is_subclass(Klass* klass) {
1019 return klass->is_subclass_of(SystemDictionary::DirectMethodHandle_klass());
1020 }
1021 static bool is_instance(oop obj);
1022
1023 // Accessors for code generation:
1024 static int member_offset_in_bytes() { return _member_offset; }
1025 };
1026
1027 // Interface to java.lang.invoke.LambdaForm objects
1028 // (These are a private interface for managing adapter code generation.)
1029
1030 class java_lang_invoke_LambdaForm: AllStatic {
1031 friend class JavaClasses;
1032
1033 private:
1034 static int _vmentry_offset; // type is MemberName
1035
1036 static void compute_offsets();
1037
1038 public:
1039 // Accessors
1040 static oop vmentry(oop lform);
1041 static void set_vmentry(oop lform, oop invoker);
1042
1043 // Testers
1044 static bool is_subclass(Klass* klass) {
1045 return SystemDictionary::LambdaForm_klass() != NULL &&
1046 klass->is_subclass_of(SystemDictionary::LambdaForm_klass());
1047 }
1048 static bool is_instance(oop obj);
1049
1050 // Accessors for code generation:
1051 static int vmentry_offset_in_bytes() { return _vmentry_offset; }
1052 };
1053
1054
1055 // Interface to java.lang.invoke.MemberName objects
1056 // (These are a private interface for Java code to query the class hierarchy.)
1057
1058 #define MEMBERNAME_INJECTED_FIELDS(macro) \
1059 macro(java_lang_invoke_MemberName, vmloader, object_signature, false) \
1060 macro(java_lang_invoke_MemberName, vmindex, intptr_signature, false) \
1061 macro(java_lang_invoke_MemberName, vmtarget, intptr_signature, false)
1062
1063 class java_lang_invoke_MemberName: AllStatic {
1064 friend class JavaClasses;
1065
1066 private:
1067 // From java.lang.invoke.MemberName:
1068 // private Class<?> clazz; // class in which the method is defined
1069 // private String name; // may be null if not yet materialized
1070 // private Object type; // may be null if not yet materialized
1071 // private int flags; // modifier bits; see reflect.Modifier
1072 // private intptr vmtarget; // VM-specific target value
1073 // private intptr_t vmindex; // member index within class or interface
1074 static int _clazz_offset;
1075 static int _name_offset;
1076 static int _type_offset;
1077 static int _flags_offset;
1078 static int _vmtarget_offset;
1079 static int _vmloader_offset;
1080 static int _vmindex_offset;
1081
1082 static void compute_offsets();
1083
1084 public:
1085 // Accessors
1086 static oop clazz(oop mname);
1087 static void set_clazz(oop mname, oop clazz);
1088
1089 static oop type(oop mname);
1090 static void set_type(oop mname, oop type);
1091
1092 static oop name(oop mname);
1093 static void set_name(oop mname, oop name);
1094
1095 static int flags(oop mname);
1096 static void set_flags(oop mname, int flags);
1097
1098 static Metadata* vmtarget(oop mname);
1099 static void set_vmtarget(oop mname, Metadata* target);
1100
1101 static intptr_t vmindex(oop mname);
1102 static void set_vmindex(oop mname, intptr_t index);
1103
1104 // Testers
1105 static bool is_subclass(Klass* klass) {
1106 return klass->is_subclass_of(SystemDictionary::MemberName_klass());
1107 }
1108 static bool is_instance(oop obj);
1109
1110 static bool is_method(oop obj);
1111
1112 // Relevant integer codes (keep these in synch. with MethodHandleNatives.Constants):
1113 enum {
1114 MN_IS_METHOD = 0x00010000, // method (not constructor)
1115 MN_IS_CONSTRUCTOR = 0x00020000, // constructor
1116 MN_IS_FIELD = 0x00040000, // field
1117 MN_IS_TYPE = 0x00080000, // nested type
1118 MN_CALLER_SENSITIVE = 0x00100000, // @CallerSensitive annotation detected
1119 MN_REFERENCE_KIND_SHIFT = 24, // refKind
1120 MN_REFERENCE_KIND_MASK = 0x0F000000 >> MN_REFERENCE_KIND_SHIFT,
1121 // The SEARCH_* bits are not for MN.flags but for the matchFlags argument of MHN.getMembers:
1122 MN_SEARCH_SUPERCLASSES = 0x00100000, // walk super classes
1123 MN_SEARCH_INTERFACES = 0x00200000 // walk implemented interfaces
1124 };
1125
1126 // Accessors for code generation:
1127 static int clazz_offset_in_bytes() { return _clazz_offset; }
1128 static int type_offset_in_bytes() { return _type_offset; }
1129 static int name_offset_in_bytes() { return _name_offset; }
1130 static int flags_offset_in_bytes() { return _flags_offset; }
1131 static int vmtarget_offset_in_bytes() { return _vmtarget_offset; }
1132 static int vmindex_offset_in_bytes() { return _vmindex_offset; }
1133 };
1134
1135
1136 // Interface to java.lang.invoke.MethodType objects
1137
1138 class java_lang_invoke_MethodType: AllStatic {
1139 friend class JavaClasses;
1140
1141 private:
1142 static int _rtype_offset;
1143 static int _ptypes_offset;
1144
1145 static void compute_offsets();
1146
1147 public:
1148 // Accessors
1149 static oop rtype(oop mt);
1150 static objArrayOop ptypes(oop mt);
1151
1152 static oop ptype(oop mt, int index);
1153 static int ptype_count(oop mt);
1154
1155 static int ptype_slot_count(oop mt); // extra counts for long/double
1156 static int rtype_slot_count(oop mt); // extra counts for long/double
1157
1158 static Symbol* as_signature(oop mt, bool intern_if_not_found, TRAPS);
1159 static void print_signature(oop mt, outputStream* st);
1160
1161 static bool is_instance(oop obj);
1162
1163 static bool equals(oop mt1, oop mt2);
1164
1165 // Accessors for code generation:
1166 static int rtype_offset_in_bytes() { return _rtype_offset; }
1167 static int ptypes_offset_in_bytes() { return _ptypes_offset; }
1168 };
1169
1170
1171 // Interface to java.lang.invoke.CallSite objects
1172
1173 class java_lang_invoke_CallSite: AllStatic {
1174 friend class JavaClasses;
1175
1176 private:
1177 static int _target_offset;
1178 static int _context_offset;
1179
1180 static void compute_offsets();
1181
1182 public:
1183 // Accessors
1184 static oop target( oop site);
1185 static void set_target( oop site, oop target);
1186 static void set_target_volatile( oop site, oop target);
1187
1188 static oop context(oop site);
1189
1190 // Testers
1191 static bool is_subclass(Klass* klass) {
1192 return klass->is_subclass_of(SystemDictionary::CallSite_klass());
1193 }
1194 static bool is_instance(oop obj);
1195
1196 // Accessors for code generation:
1197 static int target_offset_in_bytes() { return _target_offset; }
1198 };
1199
1200 // Interface to java.lang.invoke.MethodHandleNatives$CallSiteContext objects
1201
1202 #define CALLSITECONTEXT_INJECTED_FIELDS(macro) \
1203 macro(java_lang_invoke_MethodHandleNatives_CallSiteContext, vmdependencies, intptr_signature, false)
1204
1205 class java_lang_invoke_MethodHandleNatives_CallSiteContext : AllStatic {
1206 friend class JavaClasses;
1207
1208 private:
1209 static int _vmdependencies_offset;
1210
1211 static void compute_offsets();
1212
1213 public:
1214 // Accessors
1215 static nmethodBucket* vmdependencies(oop context);
1216 static void set_vmdependencies(oop context, nmethodBucket* bucket);
1217
1218 // Testers
1219 static bool is_subclass(Klass* klass) {
1220 return klass->is_subclass_of(SystemDictionary::Context_klass());
1221 }
1222 static bool is_instance(oop obj);
1223 };
1224
1225 // Interface to java.security.AccessControlContext objects
1226
1227 class java_security_AccessControlContext: AllStatic {
1228 private:
1229 // Note that for this class the layout changed between JDK1.2 and JDK1.3,
1230 // so we compute the offsets at startup rather than hard-wiring them.
1231 static int _context_offset;
1232 static int _privilegedContext_offset;
1233 static int _isPrivileged_offset;
1234 static int _isAuthorized_offset;
1235
1236 static void compute_offsets();
1237 public:
1238 static oop create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS);
1239
1240 static bool is_authorized(Handle context);
1241
1242 // Debugging/initialization
1243 friend class JavaClasses;
1244 };
1245
1246
1247 // Interface to java.lang.ClassLoader objects
1248
1249 #define CLASSLOADER_INJECTED_FIELDS(macro) \
1250 macro(java_lang_ClassLoader, loader_data, intptr_signature, false)
1251
1252 class java_lang_ClassLoader : AllStatic {
1253 private:
1254 // The fake offsets are added by the class loader when java.lang.Class is loaded
1255 enum {
1256 hc_parent_offset = 0
1257 };
1258 static int _loader_data_offset;
1259 static bool offsets_computed;
1260 static int parent_offset;
1261 static int parallelCapable_offset;
1262
1263 public:
1264 static void compute_offsets();
1265
1266 static ClassLoaderData** loader_data_addr(oop loader);
1267 static ClassLoaderData* loader_data(oop loader);
1268
1269 static oop parent(oop loader);
1270 static bool isAncestor(oop loader, oop cl);
1271
1272 // Support for parallelCapable field
1273 static bool parallelCapable(oop the_class_mirror);
1274
1275 static bool is_trusted_loader(oop loader);
1276
1277 // Fix for 4474172
1278 static oop non_reflection_class_loader(oop loader);
1279
1280 // Testers
1281 static bool is_subclass(Klass* klass) {
1282 return klass->is_subclass_of(SystemDictionary::ClassLoader_klass());
1283 }
1284 static bool is_instance(oop obj);
1285
1286 // Debugging
1287 friend class JavaClasses;
1288 friend class ClassFileParser; // access to number_of_fake_fields
1289 };
1290
1291
1292 // Interface to java.lang.System objects
1293
1294 class java_lang_System : AllStatic {
1295 private:
1296 enum {
1297 hc_static_in_offset = 0,
1298 hc_static_out_offset = 1,
1299 hc_static_err_offset = 2,
1300 hc_static_security_offset = 3
1301 };
1302
1303 static int static_in_offset;
1304 static int static_out_offset;
1305 static int static_err_offset;
1306 static int static_security_offset;
1307
1308 public:
1309 static int in_offset_in_bytes();
1310 static int out_offset_in_bytes();
1311 static int err_offset_in_bytes();
1312
1313 static bool has_security_manager();
1314
1315 // Debugging
1316 friend class JavaClasses;
1317 };
1318
1319
1320 // Interface to java.lang.StackTraceElement objects
1321
1322 class java_lang_StackTraceElement: AllStatic {
1323 private:
1324 enum {
1325 hc_declaringClass_offset = 0,
1326 hc_methodName_offset = 1,
1327 hc_fileName_offset = 2,
1328 hc_lineNumber_offset = 3
1329 };
1330
1331 static int declaringClass_offset;
1332 static int methodName_offset;
1333 static int fileName_offset;
1334 static int lineNumber_offset;
1335
1336 public:
1337 // Setters
1338 static void set_declaringClass(oop element, oop value);
1339 static void set_methodName(oop element, oop value);
1340 static void set_fileName(oop element, oop value);
1341 static void set_lineNumber(oop element, int value);
1342
1343 // Create an instance of StackTraceElement
1344 static oop create(Handle mirror, int method, int version, int bci, int cpref, TRAPS);
1345 static oop create(methodHandle method, int bci, TRAPS);
1346
1347 // Debugging
1348 friend class JavaClasses;
1349 };
1350
1351
1352 // Interface to java.lang.AssertionStatusDirectives objects
1353
1354 class java_lang_AssertionStatusDirectives: AllStatic {
1355 private:
1356 enum {
1357 hc_classes_offset,
1358 hc_classEnabled_offset,
1359 hc_packages_offset,
1360 hc_packageEnabled_offset,
1361 hc_deflt_offset
1362 };
1363
1364 static int classes_offset;
1365 static int classEnabled_offset;
1366 static int packages_offset;
1367 static int packageEnabled_offset;
1368 static int deflt_offset;
1369
1370 public:
1371 // Setters
1372 static void set_classes(oop obj, oop val);
1373 static void set_classEnabled(oop obj, oop val);
1374 static void set_packages(oop obj, oop val);
1375 static void set_packageEnabled(oop obj, oop val);
1376 static void set_deflt(oop obj, bool val);
1377 // Debugging
1378 friend class JavaClasses;
1379 };
1380
1381
1382 class java_nio_Buffer: AllStatic {
1383 private:
1384 static int _limit_offset;
1385
1386 public:
1387 static int limit_offset();
1388 static void compute_offsets();
1389 };
1390
1391 class java_util_concurrent_locks_AbstractOwnableSynchronizer : AllStatic {
1392 private:
1393 static int _owner_offset;
1394 public:
1395 static void initialize(TRAPS);
1396 static oop get_owner_threadObj(oop obj);
1397 };
1398
1399 // Use to declare fields that need to be injected into Java classes
1400 // for the JVM to use. The name_index and signature_index are
1401 // declared in vmSymbols. The may_be_java flag is used to declare
1402 // fields that might already exist in Java but should be injected if
1403 // they don't. Otherwise the field is unconditionally injected and
1404 // the JVM uses the injected one. This is to ensure that name
1405 // collisions don't occur. In general may_be_java should be false
1406 // unless there's a good reason.
1407
1408 class InjectedField {
1409 public:
1410 const SystemDictionary::WKID klass_id;
1411 const vmSymbols::SID name_index;
1412 const vmSymbols::SID signature_index;
1413 const bool may_be_java;
1414
1415
1416 Klass* klass() const { return SystemDictionary::well_known_klass(klass_id); }
1417 Symbol* name() const { return lookup_symbol(name_index); }
1418 Symbol* signature() const { return lookup_symbol(signature_index); }
1419
1420 int compute_offset();
1421
1422 // Find the Symbol for this index
1423 static Symbol* lookup_symbol(int symbol_index) {
1424 return vmSymbols::symbol_at((vmSymbols::SID)symbol_index);
1425 }
1426 };
1427
1428 #define DECLARE_INJECTED_FIELD_ENUM(klass, name, signature, may_be_java) \
1429 klass##_##name##_enum,
1430
1431 #define ALL_INJECTED_FIELDS(macro) \
1432 CLASS_INJECTED_FIELDS(macro) \
1433 CLASSLOADER_INJECTED_FIELDS(macro) \
1434 MEMBERNAME_INJECTED_FIELDS(macro) \
1435 CALLSITECONTEXT_INJECTED_FIELDS(macro)
1436
1437 // Interface to hard-coded offset checking
1438
1439 class JavaClasses : AllStatic {
1440 private:
1441
1442 static InjectedField _injected_fields[];
1443
1444 static bool check_offset(const char *klass_name, int offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1445 static bool check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1446 static bool check_constant(const char *klass_name, int constant, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1447
1448 public:
1449 enum InjectedFieldID {
1450 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD_ENUM)
1451 MAX_enum
1452 };
1453
1454 static int compute_injected_offset(InjectedFieldID id);
1455
1456 static void compute_hard_coded_offsets();
1457 static void compute_offsets();
1458 static void check_offsets() PRODUCT_RETURN;
1459
1460 static InjectedField* get_injected(Symbol* class_name, int* field_count);
1461 };
1462
1463 #undef DECLARE_INJECTED_FIELD_ENUM
1464
1465 #endif // SHARE_VM_CLASSFILE_JAVACLASSES_HPP