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 typeArrayOop value_array = ((typeArrayOop)java_string->obj_field(value_offset));
161 if (value_array == NULL) {
162 return 0;
163 } else {
164 return value_array->length();
165 }
166 }
167 }
168 static int utf8_length(oop java_string);
169
170 // String converters
171 static char* as_utf8_string(oop java_string);
172 static char* as_utf8_string(oop java_string, char* buf, int buflen);
173 static char* as_utf8_string(oop java_string, int start, int len);
174 static char* as_utf8_string(oop java_string, int start, int len, char* buf, int buflen);
175 static char* as_platform_dependent_str(Handle java_string, TRAPS);
176 static jchar* as_unicode_string(oop java_string, int& length, TRAPS);
177 // produce an ascii string with all other values quoted using \u####
178 static char* as_quoted_ascii(oop java_string);
179
180 // Compute the hash value for a java.lang.String object which would
181 // contain the characters passed in.
182 //
183 // As the hash value used by the String object itself, in
184 // String.hashCode(). This value is normally calculated in Java code
185 // in the String.hashCode method(), but is precomputed for String
186 // objects in the shared archive file.
187 // hash P(31) from Kernighan & Ritchie
188 //
189 // For this reason, THIS ALGORITHM MUST MATCH String.hashCode().
190 template <typename T> static unsigned int hash_code(T* s, int len) {
191 unsigned int h = 0;
192 while (len-- > 0) {
193 h = 31*h + (unsigned int) *s;
194 s++;
195 }
196 return h;
197 }
198 static unsigned int hash_code(oop java_string);
199
200 // This is the string hash code used by the StringTable, which may be
201 // the same as String.hashCode or an alternate hash code.
202 static unsigned int hash_string(oop java_string);
203
204 static bool equals(oop java_string, jchar* chars, int len);
205 static bool equals(oop str1, oop str2);
206
207 // Conversion between '.' and '/' formats
208 static Handle externalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '/', '.', THREAD); }
209 static Handle internalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '.', '/', THREAD); }
210
211 // Conversion
212 static Symbol* as_symbol(Handle java_string, TRAPS);
213 static Symbol* as_symbol_or_null(oop java_string);
214
215 // Testers
216 static bool is_instance(oop obj);
217 static bool is_instance_inlined(oop obj);
218
219 // Debugging
220 static void print(oop java_string, outputStream* st);
221 friend class JavaClasses;
222 friend class StringTable;
223 };
224
225
226 // Interface to java.lang.Class objects
227
228 #define CLASS_INJECTED_FIELDS(macro) \
229 macro(java_lang_Class, klass, intptr_signature, false) \
230 macro(java_lang_Class, array_klass, intptr_signature, false) \
231 macro(java_lang_Class, oop_size, int_signature, false) \
232 macro(java_lang_Class, static_oop_field_count, int_signature, false) \
233 macro(java_lang_Class, protection_domain, object_signature, false) \
234 macro(java_lang_Class, signers, object_signature, false)
235
236 class java_lang_Class : AllStatic {
237 friend class VMStructs;
238
239 private:
240 // The fake offsets are added by the class loader when java.lang.Class is loaded
241
242 static int _klass_offset;
243 static int _array_klass_offset;
244
245 static int _oop_size_offset;
246 static int _static_oop_field_count_offset;
247
248 static int _protection_domain_offset;
249 static int _init_lock_offset;
250 static int _signers_offset;
251 static int _class_loader_offset;
252 static int _component_mirror_offset;
253
254 static bool offsets_computed;
255 static int classRedefinedCount_offset;
256
257 static GrowableArray<Klass*>* _fixup_mirror_list;
258
259 static void set_init_lock(oop java_class, oop init_lock);
260 static void set_protection_domain(oop java_class, oop protection_domain);
261 static void set_class_loader(oop java_class, oop class_loader);
262 static void set_component_mirror(oop java_class, oop comp_mirror);
263 static void initialize_mirror_fields(KlassHandle k, Handle mirror, Handle protection_domain, TRAPS);
264 public:
265 static void compute_offsets();
266
267 // Instance creation
268 static void create_mirror(KlassHandle k, Handle class_loader,
269 Handle protection_domain, TRAPS);
270 static void fixup_mirror(KlassHandle k, TRAPS);
271 static oop create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS);
272 // Conversion
273 static Klass* as_Klass(oop java_class);
274 static void set_klass(oop java_class, Klass* klass);
275 static BasicType as_BasicType(oop java_class, Klass** reference_klass = NULL);
276 static BasicType as_BasicType(oop java_class, KlassHandle* reference_klass) {
277 Klass* refk_oop = NULL;
278 BasicType result = as_BasicType(java_class, &refk_oop);
279 (*reference_klass) = KlassHandle(refk_oop);
280 return result;
281 }
282 static Symbol* as_signature(oop java_class, bool intern_if_not_found, TRAPS);
283 static void print_signature(oop java_class, outputStream *st);
284 static const char* as_external_name(oop java_class);
285 // Testing
286 static bool is_instance(oop obj);
287
288 static bool is_primitive(oop java_class);
289 static BasicType primitive_type(oop java_class);
290 static oop primitive_mirror(BasicType t);
291 // JVM_NewArray support
292 static Klass* array_klass(oop java_class);
293 static void set_array_klass(oop java_class, Klass* klass);
294 // compiler support for class operations
295 static int klass_offset_in_bytes() { return _klass_offset; }
296 static int array_klass_offset_in_bytes() { return _array_klass_offset; }
297 // Support for classRedefinedCount field
298 static int classRedefinedCount(oop the_class_mirror);
299 static void set_classRedefinedCount(oop the_class_mirror, int value);
300
301 // Support for embedded per-class oops
302 static oop protection_domain(oop java_class);
303 static oop init_lock(oop java_class);
304 static oop component_mirror(oop java_class);
305 static objArrayOop signers(oop java_class);
306 static void set_signers(oop java_class, objArrayOop signers);
307
308 static oop class_loader(oop java_class);
309
310 static int oop_size(oop java_class);
311 static void set_oop_size(oop java_class, int size);
312 static int static_oop_field_count(oop java_class);
313 static void set_static_oop_field_count(oop java_class, int size);
314
315 static GrowableArray<Klass*>* fixup_mirror_list() {
316 return _fixup_mirror_list;
317 }
318 static void set_fixup_mirror_list(GrowableArray<Klass*>* v) {
319 _fixup_mirror_list = v;
320 }
321 // Debugging
322 friend class JavaClasses;
323 friend class InstanceKlass; // verification code accesses offsets
324 friend class ClassFileParser; // access to number_of_fake_fields
325 };
326
327 // Interface to java.lang.Thread objects
328
329 class java_lang_Thread : AllStatic {
330 private:
331 // Note that for this class the layout changed between JDK1.2 and JDK1.3,
332 // so we compute the offsets at startup rather than hard-wiring them.
333 static int _name_offset;
334 static int _group_offset;
335 static int _contextClassLoader_offset;
336 static int _inheritedAccessControlContext_offset;
337 static int _priority_offset;
338 static int _eetop_offset;
339 static int _daemon_offset;
340 static int _stillborn_offset;
341 static int _stackSize_offset;
342 static int _tid_offset;
343 static int _thread_status_offset;
344 static int _park_blocker_offset;
345 static int _park_event_offset ;
346
347 static void compute_offsets();
348
349 public:
350 // Instance creation
351 static oop create();
352 // Returns the JavaThread associated with the thread obj
353 static JavaThread* thread(oop java_thread);
354 // Set JavaThread for instance
355 static void set_thread(oop java_thread, JavaThread* thread);
356 // Name
357 static oop name(oop java_thread);
358 static void set_name(oop java_thread, oop name);
359 // Priority
360 static ThreadPriority priority(oop java_thread);
361 static void set_priority(oop java_thread, ThreadPriority priority);
362 // Thread group
363 static oop threadGroup(oop java_thread);
364 // Stillborn
365 static bool is_stillborn(oop java_thread);
366 static void set_stillborn(oop java_thread);
367 // Alive (NOTE: this is not really a field, but provides the correct
368 // definition without doing a Java call)
369 static bool is_alive(oop java_thread);
370 // Daemon
371 static bool is_daemon(oop java_thread);
372 static void set_daemon(oop java_thread);
373 // Context ClassLoader
374 static oop context_class_loader(oop java_thread);
375 // Control context
376 static oop inherited_access_control_context(oop java_thread);
377 // Stack size hint
378 static jlong stackSize(oop java_thread);
379 // Thread ID
380 static jlong thread_id(oop java_thread);
381
382 // Blocker object responsible for thread parking
383 static oop park_blocker(oop java_thread);
384
385 // Pointer to type-stable park handler, encoded as jlong.
386 // Should be set when apparently null
387 // For details, see unsafe.cpp Unsafe_Unpark
388 static jlong park_event(oop java_thread);
389 static bool set_park_event(oop java_thread, jlong ptr);
390
391 // Java Thread Status for JVMTI and M&M use.
392 // This thread status info is saved in threadStatus field of
393 // java.lang.Thread java class.
394 enum ThreadStatus {
395 NEW = 0,
396 RUNNABLE = JVMTI_THREAD_STATE_ALIVE + // runnable / running
397 JVMTI_THREAD_STATE_RUNNABLE,
398 SLEEPING = JVMTI_THREAD_STATE_ALIVE + // Thread.sleep()
399 JVMTI_THREAD_STATE_WAITING +
400 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
401 JVMTI_THREAD_STATE_SLEEPING,
402 IN_OBJECT_WAIT = JVMTI_THREAD_STATE_ALIVE + // Object.wait()
403 JVMTI_THREAD_STATE_WAITING +
404 JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
405 JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
406 IN_OBJECT_WAIT_TIMED = JVMTI_THREAD_STATE_ALIVE + // Object.wait(long)
407 JVMTI_THREAD_STATE_WAITING +
408 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
409 JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
410 PARKED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park()
411 JVMTI_THREAD_STATE_WAITING +
412 JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
413 JVMTI_THREAD_STATE_PARKED,
414 PARKED_TIMED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park(long)
415 JVMTI_THREAD_STATE_WAITING +
416 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
417 JVMTI_THREAD_STATE_PARKED,
418 BLOCKED_ON_MONITOR_ENTER = JVMTI_THREAD_STATE_ALIVE + // (re-)entering a synchronization block
419 JVMTI_THREAD_STATE_BLOCKED_ON_MONITOR_ENTER,
420 TERMINATED = JVMTI_THREAD_STATE_TERMINATED
421 };
422 // Write thread status info to threadStatus field of java.lang.Thread.
423 static void set_thread_status(oop java_thread_oop, ThreadStatus status);
424 // Read thread status info from threadStatus field of java.lang.Thread.
425 static ThreadStatus get_thread_status(oop java_thread_oop);
426
427 static const char* thread_status_name(oop java_thread_oop);
428
429 // Debugging
430 friend class JavaClasses;
431 };
432
433 // Interface to java.lang.ThreadGroup objects
434
435 class java_lang_ThreadGroup : AllStatic {
436 private:
437 static int _parent_offset;
438 static int _name_offset;
439 static int _threads_offset;
440 static int _groups_offset;
441 static int _maxPriority_offset;
442 static int _destroyed_offset;
443 static int _daemon_offset;
444 static int _vmAllowSuspension_offset;
445 static int _nthreads_offset;
446 static int _ngroups_offset;
447
448 static void compute_offsets();
449
450 public:
451 // parent ThreadGroup
452 static oop parent(oop java_thread_group);
453 // name
454 static typeArrayOop name(oop java_thread_group);
455 // ("name as oop" accessor is not necessary)
456 // Number of threads in group
457 static int nthreads(oop java_thread_group);
458 // threads
459 static objArrayOop threads(oop java_thread_group);
460 // Number of threads in group
461 static int ngroups(oop java_thread_group);
462 // groups
463 static objArrayOop groups(oop java_thread_group);
464 // maxPriority in group
465 static ThreadPriority maxPriority(oop java_thread_group);
466 // Destroyed
467 static bool is_destroyed(oop java_thread_group);
468 // Daemon
469 static bool is_daemon(oop java_thread_group);
470 // vmAllowSuspension
471 static bool is_vmAllowSuspension(oop java_thread_group);
472 // Debugging
473 friend class JavaClasses;
474 };
475
476
477
478 // Interface to java.lang.Throwable objects
479
480 class java_lang_Throwable: AllStatic {
481 friend class BacktraceBuilder;
482
483 private:
484 // Offsets
485 enum {
486 hc_backtrace_offset = 0,
487 hc_detailMessage_offset = 1,
488 hc_cause_offset = 2, // New since 1.4
489 hc_stackTrace_offset = 3 // New since 1.4
490 };
491 enum {
492 hc_static_unassigned_stacktrace_offset = 0 // New since 1.7
493 };
494 // Trace constants
495 enum {
496 trace_methods_offset = 0,
497 trace_bcis_offset = 1,
498 trace_mirrors_offset = 2,
499 trace_cprefs_offset = 3,
500 trace_next_offset = 4,
501 trace_size = 5,
502 trace_chunk_size = 32
503 };
504
505 static int backtrace_offset;
506 static int detailMessage_offset;
507 static int cause_offset;
508 static int stackTrace_offset;
509 static int static_unassigned_stacktrace_offset;
510
511 // Printing
512 static char* print_stack_element_to_buffer(Handle mirror, int method, int version, int bci, int cpref);
513 // StackTrace (programmatic access, new since 1.4)
514 static void clear_stacktrace(oop throwable);
515 // No stack trace available
516 static const char* no_stack_trace_message();
517 // Stacktrace (post JDK 1.7.0 to allow immutability protocol to be followed)
518 static void set_stacktrace(oop throwable, oop st_element_array);
519 static oop unassigned_stacktrace();
520
521 public:
522 // Backtrace
523 static oop backtrace(oop throwable);
524 static void set_backtrace(oop throwable, oop value);
525 // Needed by JVMTI to filter out this internal field.
526 static int get_backtrace_offset() { return backtrace_offset;}
527 static int get_detailMessage_offset() { return detailMessage_offset;}
528 // Message
529 static oop message(oop throwable);
530 static oop message(Handle throwable);
531 static void set_message(oop throwable, oop value);
532 static Symbol* detail_message(oop throwable);
533 static void print_stack_element(outputStream *st, Handle mirror, int method,
534 int version, int bci, int cpref);
535 static void print_stack_element(outputStream *st, methodHandle method, int bci);
536 static void print_stack_usage(Handle stream);
537
538 // Allocate space for backtrace (created but stack trace not filled in)
539 static void allocate_backtrace(Handle throwable, TRAPS);
540 // Fill in current stack trace for throwable with preallocated backtrace (no GC)
541 static void fill_in_stack_trace_of_preallocated_backtrace(Handle throwable);
542 // Fill in current stack trace, can cause GC
543 static void fill_in_stack_trace(Handle throwable, methodHandle method, TRAPS);
544 static void fill_in_stack_trace(Handle throwable, methodHandle method = methodHandle());
545 // Programmatic access to stack trace
546 static oop get_stack_trace_element(oop throwable, int index, TRAPS);
547 static int get_stack_trace_depth(oop throwable, TRAPS);
548 // Printing
549 static void print(oop throwable, outputStream* st);
550 static void print(Handle throwable, outputStream* st);
551 static void print_stack_trace(oop throwable, outputStream* st);
552 // Debugging
553 friend class JavaClasses;
554 };
555
556
557 // Interface to java.lang.reflect.AccessibleObject objects
558
559 class java_lang_reflect_AccessibleObject: AllStatic {
560 private:
561 // Note that to reduce dependencies on the JDK we compute these
562 // offsets at run-time.
563 static int override_offset;
564
565 static void compute_offsets();
566
567 public:
568 // Accessors
569 static jboolean override(oop reflect);
570 static void set_override(oop reflect, jboolean value);
571
572 // Debugging
573 friend class JavaClasses;
574 };
575
576
577 // Interface to java.lang.reflect.Method objects
578
579 class java_lang_reflect_Method : public java_lang_reflect_AccessibleObject {
580 private:
581 // Note that to reduce dependencies on the JDK we compute these
582 // offsets at run-time.
583 static int clazz_offset;
584 static int name_offset;
585 static int returnType_offset;
586 static int parameterTypes_offset;
587 static int exceptionTypes_offset;
588 static int slot_offset;
589 static int modifiers_offset;
590 static int signature_offset;
591 static int annotations_offset;
592 static int parameter_annotations_offset;
593 static int annotation_default_offset;
594 static int type_annotations_offset;
595
596 static void compute_offsets();
597
598 public:
599 // Allocation
600 static Handle create(TRAPS);
601
602 // Accessors
603 static oop clazz(oop reflect);
604 static void set_clazz(oop reflect, oop value);
605
606 static oop name(oop method);
607 static void set_name(oop method, oop value);
608
609 static oop return_type(oop method);
610 static void set_return_type(oop method, oop value);
611
612 static oop parameter_types(oop method);
613 static void set_parameter_types(oop method, oop value);
614
615 static oop exception_types(oop method);
616 static void set_exception_types(oop method, oop value);
617
618 static int slot(oop reflect);
619 static void set_slot(oop reflect, int value);
620
621 static int modifiers(oop method);
622 static void set_modifiers(oop method, int value);
623
624 static bool has_signature_field();
625 static oop signature(oop method);
626 static void set_signature(oop method, oop value);
627
628 static bool has_annotations_field();
629 static oop annotations(oop method);
630 static void set_annotations(oop method, oop value);
631
632 static bool has_parameter_annotations_field();
633 static oop parameter_annotations(oop method);
634 static void set_parameter_annotations(oop method, oop value);
635
636 static bool has_annotation_default_field();
637 static oop annotation_default(oop method);
638 static void set_annotation_default(oop method, oop value);
639
640 static bool has_type_annotations_field();
641 static oop type_annotations(oop method);
642 static void set_type_annotations(oop method, oop value);
643
644 // Debugging
645 friend class JavaClasses;
646 };
647
648
649 // Interface to java.lang.reflect.Constructor objects
650
651 class java_lang_reflect_Constructor : public java_lang_reflect_AccessibleObject {
652 private:
653 // Note that to reduce dependencies on the JDK we compute these
654 // offsets at run-time.
655 static int clazz_offset;
656 static int parameterTypes_offset;
657 static int exceptionTypes_offset;
658 static int slot_offset;
659 static int modifiers_offset;
660 static int signature_offset;
661 static int annotations_offset;
662 static int parameter_annotations_offset;
663 static int type_annotations_offset;
664
665 static void compute_offsets();
666
667 public:
668 // Allocation
669 static Handle create(TRAPS);
670
671 // Accessors
672 static oop clazz(oop reflect);
673 static void set_clazz(oop reflect, oop value);
674
675 static oop parameter_types(oop constructor);
676 static void set_parameter_types(oop constructor, oop value);
677
678 static oop exception_types(oop constructor);
679 static void set_exception_types(oop constructor, oop value);
680
681 static int slot(oop reflect);
682 static void set_slot(oop reflect, int value);
683
684 static int modifiers(oop constructor);
685 static void set_modifiers(oop constructor, int value);
686
687 static bool has_signature_field();
688 static oop signature(oop constructor);
689 static void set_signature(oop constructor, oop value);
690
691 static bool has_annotations_field();
692 static oop annotations(oop constructor);
693 static void set_annotations(oop constructor, oop value);
694
695 static bool has_parameter_annotations_field();
696 static oop parameter_annotations(oop method);
697 static void set_parameter_annotations(oop method, oop value);
698
699 static bool has_type_annotations_field();
700 static oop type_annotations(oop constructor);
701 static void set_type_annotations(oop constructor, oop value);
702
703 // Debugging
704 friend class JavaClasses;
705 };
706
707
708 // Interface to java.lang.reflect.Field objects
709
710 class java_lang_reflect_Field : public java_lang_reflect_AccessibleObject {
711 private:
712 // Note that to reduce dependencies on the JDK we compute these
713 // offsets at run-time.
714 static int clazz_offset;
715 static int name_offset;
716 static int type_offset;
717 static int slot_offset;
718 static int modifiers_offset;
719 static int signature_offset;
720 static int annotations_offset;
721 static int type_annotations_offset;
722
723 static void compute_offsets();
724
725 public:
726 // Allocation
727 static Handle create(TRAPS);
728
729 // Accessors
730 static oop clazz(oop reflect);
731 static void set_clazz(oop reflect, oop value);
732
733 static oop name(oop field);
734 static void set_name(oop field, oop value);
735
736 static oop type(oop field);
737 static void set_type(oop field, oop value);
738
739 static int slot(oop reflect);
740 static void set_slot(oop reflect, int value);
741
742 static int modifiers(oop field);
743 static void set_modifiers(oop field, int value);
744
745 static bool has_signature_field();
746 static oop signature(oop constructor);
747 static void set_signature(oop constructor, oop value);
748
749 static bool has_annotations_field();
750 static oop annotations(oop constructor);
751 static void set_annotations(oop constructor, oop value);
752
753 static bool has_parameter_annotations_field();
754 static oop parameter_annotations(oop method);
755 static void set_parameter_annotations(oop method, oop value);
756
757 static bool has_annotation_default_field();
758 static oop annotation_default(oop method);
759 static void set_annotation_default(oop method, oop value);
760
761 static bool has_type_annotations_field();
762 static oop type_annotations(oop field);
763 static void set_type_annotations(oop field, oop value);
764
765 // Debugging
766 friend class JavaClasses;
767 };
768
769 class java_lang_reflect_Parameter {
770 private:
771 // Note that to reduce dependencies on the JDK we compute these
772 // offsets at run-time.
773 static int name_offset;
774 static int modifiers_offset;
775 static int index_offset;
776 static int executable_offset;
777
778 static void compute_offsets();
779
780 public:
781 // Allocation
782 static Handle create(TRAPS);
783
784 // Accessors
785 static oop name(oop field);
786 static void set_name(oop field, oop value);
787
788 static int index(oop reflect);
789 static void set_index(oop reflect, int value);
790
791 static int modifiers(oop reflect);
792 static void set_modifiers(oop reflect, int value);
793
794 static oop executable(oop constructor);
795 static void set_executable(oop constructor, oop value);
796
797 friend class JavaClasses;
798 };
799
800 // Interface to sun.reflect.ConstantPool objects
801 class sun_reflect_ConstantPool {
802 private:
803 // Note that to reduce dependencies on the JDK we compute these
804 // offsets at run-time.
805 static int _oop_offset;
806
807 static void compute_offsets();
808
809 public:
810 // Allocation
811 static Handle create(TRAPS);
812
813 // Accessors
814 static void set_cp(oop reflect, ConstantPool* value);
815 static int oop_offset() {
816 return _oop_offset;
817 }
818
819 static ConstantPool* get_cp(oop reflect);
820
821 // Debugging
822 friend class JavaClasses;
823 };
824
825 // Interface to sun.reflect.UnsafeStaticFieldAccessorImpl objects
826 class sun_reflect_UnsafeStaticFieldAccessorImpl {
827 private:
828 static int _base_offset;
829 static void compute_offsets();
830
831 public:
832 static int base_offset() {
833 return _base_offset;
834 }
835
836 // Debugging
837 friend class JavaClasses;
838 };
839
840 // Interface to java.lang primitive type boxing objects:
841 // - java.lang.Boolean
842 // - java.lang.Character
843 // - java.lang.Float
844 // - java.lang.Double
845 // - java.lang.Byte
846 // - java.lang.Short
847 // - java.lang.Integer
848 // - java.lang.Long
849
850 // This could be separated out into 8 individual classes.
851
852 class java_lang_boxing_object: AllStatic {
853 private:
854 enum {
855 hc_value_offset = 0
856 };
857 static int value_offset;
858 static int long_value_offset;
859
860 static oop initialize_and_allocate(BasicType type, TRAPS);
861 public:
862 // Allocation. Returns a boxed value, or NULL for invalid type.
863 static oop create(BasicType type, jvalue* value, TRAPS);
864 // Accessors. Returns the basic type being boxed, or T_ILLEGAL for invalid oop.
865 static BasicType get_value(oop box, jvalue* value);
866 static BasicType set_value(oop box, jvalue* value);
867 static BasicType basic_type(oop box);
868 static bool is_instance(oop box) { return basic_type(box) != T_ILLEGAL; }
869 static bool is_instance(oop box, BasicType type) { return basic_type(box) == type; }
870 static void print(oop box, outputStream* st) { jvalue value; print(get_value(box, &value), &value, st); }
871 static void print(BasicType type, jvalue* value, outputStream* st);
872
873 static int value_offset_in_bytes(BasicType type) {
874 return ( type == T_LONG || type == T_DOUBLE ) ? long_value_offset :
875 value_offset;
876 }
877
878 // Debugging
879 friend class JavaClasses;
880 };
881
882
883
884 // Interface to java.lang.ref.Reference objects
885
886 class java_lang_ref_Reference: AllStatic {
887 public:
888 enum {
889 hc_referent_offset = 0,
890 hc_queue_offset = 1,
891 hc_next_offset = 2,
892 hc_discovered_offset = 3 // Is not last, see SoftRefs.
893 };
894 enum {
895 hc_static_lock_offset = 0,
896 hc_static_pending_offset = 1
897 };
898
899 static int referent_offset;
900 static int queue_offset;
901 static int next_offset;
902 static int discovered_offset;
903 static int static_lock_offset;
904 static int static_pending_offset;
905 static int number_of_fake_oop_fields;
906
907 // Accessors
908 static oop referent(oop ref) {
909 return ref->obj_field(referent_offset);
910 }
911 static void set_referent(oop ref, oop value) {
912 ref->obj_field_put(referent_offset, value);
913 }
914 static void set_referent_raw(oop ref, oop value) {
915 ref->obj_field_put_raw(referent_offset, value);
916 }
917 static HeapWord* referent_addr(oop ref) {
918 return ref->obj_field_addr<HeapWord>(referent_offset);
919 }
920 static oop next(oop ref) {
921 return ref->obj_field(next_offset);
922 }
923 static void set_next(oop ref, oop value) {
924 ref->obj_field_put(next_offset, value);
925 }
926 static void set_next_raw(oop ref, oop value) {
927 ref->obj_field_put_raw(next_offset, value);
928 }
929 static HeapWord* next_addr(oop ref) {
930 return ref->obj_field_addr<HeapWord>(next_offset);
931 }
932 static oop discovered(oop ref) {
933 return ref->obj_field(discovered_offset);
934 }
935 static void set_discovered(oop ref, oop value) {
936 ref->obj_field_put(discovered_offset, value);
937 }
938 static void set_discovered_raw(oop ref, oop value) {
939 ref->obj_field_put_raw(discovered_offset, value);
940 }
941 static HeapWord* discovered_addr(oop ref) {
942 return ref->obj_field_addr<HeapWord>(discovered_offset);
943 }
944 // Accessors for statics
945 static oop pending_list_lock();
946 static oop pending_list();
947
948 static HeapWord* pending_list_lock_addr();
949 static HeapWord* pending_list_addr();
950 };
951
952
953 // Interface to java.lang.ref.SoftReference objects
954
955 class java_lang_ref_SoftReference: public java_lang_ref_Reference {
956 public:
957 enum {
958 // The timestamp is a long field and may need to be adjusted for alignment.
959 hc_timestamp_offset = hc_discovered_offset + 1
960 };
961 enum {
962 hc_static_clock_offset = 0
963 };
964
965 static int timestamp_offset;
966 static int static_clock_offset;
967
968 // Accessors
969 static jlong timestamp(oop ref);
970
971 // Accessors for statics
972 static jlong clock();
973 static void set_clock(jlong value);
974 };
975
976 // Interface to java.lang.invoke.MethodHandle objects
977
978 class MethodHandleEntry;
979
980 class java_lang_invoke_MethodHandle: AllStatic {
981 friend class JavaClasses;
982
983 private:
984 static int _type_offset; // the MethodType of this MH
985 static int _form_offset; // the LambdaForm of this MH
986
987 static void compute_offsets();
988
989 public:
990 // Accessors
991 static oop type(oop mh);
992 static void set_type(oop mh, oop mtype);
993
994 static oop form(oop mh);
995 static void set_form(oop mh, oop lform);
996
997 // Testers
998 static bool is_subclass(Klass* klass) {
999 return klass->is_subclass_of(SystemDictionary::MethodHandle_klass());
1000 }
1001 static bool is_instance(oop obj);
1002
1003 // Accessors for code generation:
1004 static int type_offset_in_bytes() { return _type_offset; }
1005 static int form_offset_in_bytes() { return _form_offset; }
1006 };
1007
1008 // Interface to java.lang.invoke.DirectMethodHandle objects
1009
1010 class java_lang_invoke_DirectMethodHandle: AllStatic {
1011 friend class JavaClasses;
1012
1013 private:
1014 static int _member_offset; // the MemberName of this DMH
1015
1016 static void compute_offsets();
1017
1018 public:
1019 // Accessors
1020 static oop member(oop mh);
1021
1022 // Testers
1023 static bool is_subclass(Klass* klass) {
1024 return klass->is_subclass_of(SystemDictionary::DirectMethodHandle_klass());
1025 }
1026 static bool is_instance(oop obj);
1027
1028 // Accessors for code generation:
1029 static int member_offset_in_bytes() { return _member_offset; }
1030 };
1031
1032 // Interface to java.lang.invoke.LambdaForm objects
1033 // (These are a private interface for managing adapter code generation.)
1034
1035 class java_lang_invoke_LambdaForm: AllStatic {
1036 friend class JavaClasses;
1037
1038 private:
1039 static int _vmentry_offset; // type is MemberName
1040
1041 static void compute_offsets();
1042
1043 public:
1044 // Accessors
1045 static oop vmentry(oop lform);
1046 static void set_vmentry(oop lform, oop invoker);
1047
1048 // Testers
1049 static bool is_subclass(Klass* klass) {
1050 return SystemDictionary::LambdaForm_klass() != NULL &&
1051 klass->is_subclass_of(SystemDictionary::LambdaForm_klass());
1052 }
1053 static bool is_instance(oop obj);
1054
1055 // Accessors for code generation:
1056 static int vmentry_offset_in_bytes() { return _vmentry_offset; }
1057 };
1058
1059
1060 // Interface to java.lang.invoke.MemberName objects
1061 // (These are a private interface for Java code to query the class hierarchy.)
1062
1063 #define MEMBERNAME_INJECTED_FIELDS(macro) \
1064 macro(java_lang_invoke_MemberName, vmloader, object_signature, false) \
1065 macro(java_lang_invoke_MemberName, vmindex, intptr_signature, false) \
1066 macro(java_lang_invoke_MemberName, vmtarget, intptr_signature, false)
1067
1068 class java_lang_invoke_MemberName: AllStatic {
1069 friend class JavaClasses;
1070
1071 private:
1072 // From java.lang.invoke.MemberName:
1073 // private Class<?> clazz; // class in which the method is defined
1074 // private String name; // may be null if not yet materialized
1075 // private Object type; // may be null if not yet materialized
1076 // private int flags; // modifier bits; see reflect.Modifier
1077 // private intptr vmtarget; // VM-specific target value
1078 // private intptr_t vmindex; // member index within class or interface
1079 static int _clazz_offset;
1080 static int _name_offset;
1081 static int _type_offset;
1082 static int _flags_offset;
1083 static int _vmtarget_offset;
1084 static int _vmloader_offset;
1085 static int _vmindex_offset;
1086
1087 static void compute_offsets();
1088
1089 public:
1090 // Accessors
1091 static oop clazz(oop mname);
1092 static void set_clazz(oop mname, oop clazz);
1093
1094 static oop type(oop mname);
1095 static void set_type(oop mname, oop type);
1096
1097 static oop name(oop mname);
1098 static void set_name(oop mname, oop name);
1099
1100 static int flags(oop mname);
1101 static void set_flags(oop mname, int flags);
1102
1103 static Metadata* vmtarget(oop mname);
1104 static void set_vmtarget(oop mname, Metadata* target);
1105
1106 static intptr_t vmindex(oop mname);
1107 static void set_vmindex(oop mname, intptr_t index);
1108
1109 // Testers
1110 static bool is_subclass(Klass* klass) {
1111 return klass->is_subclass_of(SystemDictionary::MemberName_klass());
1112 }
1113 static bool is_instance(oop obj);
1114
1115 static bool is_method(oop obj);
1116
1117 // Relevant integer codes (keep these in synch. with MethodHandleNatives.Constants):
1118 enum {
1119 MN_IS_METHOD = 0x00010000, // method (not constructor)
1120 MN_IS_CONSTRUCTOR = 0x00020000, // constructor
1121 MN_IS_FIELD = 0x00040000, // field
1122 MN_IS_TYPE = 0x00080000, // nested type
1123 MN_CALLER_SENSITIVE = 0x00100000, // @CallerSensitive annotation detected
1124 MN_REFERENCE_KIND_SHIFT = 24, // refKind
1125 MN_REFERENCE_KIND_MASK = 0x0F000000 >> MN_REFERENCE_KIND_SHIFT,
1126 // The SEARCH_* bits are not for MN.flags but for the matchFlags argument of MHN.getMembers:
1127 MN_SEARCH_SUPERCLASSES = 0x00100000, // walk super classes
1128 MN_SEARCH_INTERFACES = 0x00200000 // walk implemented interfaces
1129 };
1130
1131 // Accessors for code generation:
1132 static int clazz_offset_in_bytes() { return _clazz_offset; }
1133 static int type_offset_in_bytes() { return _type_offset; }
1134 static int name_offset_in_bytes() { return _name_offset; }
1135 static int flags_offset_in_bytes() { return _flags_offset; }
1136 static int vmtarget_offset_in_bytes() { return _vmtarget_offset; }
1137 static int vmindex_offset_in_bytes() { return _vmindex_offset; }
1138 };
1139
1140
1141 // Interface to java.lang.invoke.MethodType objects
1142
1143 class java_lang_invoke_MethodType: AllStatic {
1144 friend class JavaClasses;
1145
1146 private:
1147 static int _rtype_offset;
1148 static int _ptypes_offset;
1149
1150 static void compute_offsets();
1151
1152 public:
1153 // Accessors
1154 static oop rtype(oop mt);
1155 static objArrayOop ptypes(oop mt);
1156
1157 static oop ptype(oop mt, int index);
1158 static int ptype_count(oop mt);
1159
1160 static int ptype_slot_count(oop mt); // extra counts for long/double
1161 static int rtype_slot_count(oop mt); // extra counts for long/double
1162
1163 static Symbol* as_signature(oop mt, bool intern_if_not_found, TRAPS);
1164 static void print_signature(oop mt, outputStream* st);
1165
1166 static bool is_instance(oop obj);
1167
1168 static bool equals(oop mt1, oop mt2);
1169
1170 // Accessors for code generation:
1171 static int rtype_offset_in_bytes() { return _rtype_offset; }
1172 static int ptypes_offset_in_bytes() { return _ptypes_offset; }
1173 };
1174
1175
1176 // Interface to java.lang.invoke.CallSite objects
1177
1178 class java_lang_invoke_CallSite: AllStatic {
1179 friend class JavaClasses;
1180
1181 private:
1182 static int _target_offset;
1183 static int _context_offset;
1184
1185 static void compute_offsets();
1186
1187 public:
1188 // Accessors
1189 static oop target( oop site);
1190 static void set_target( oop site, oop target);
1191 static void set_target_volatile( oop site, oop target);
1192
1193 static oop context(oop site);
1194
1195 // Testers
1196 static bool is_subclass(Klass* klass) {
1197 return klass->is_subclass_of(SystemDictionary::CallSite_klass());
1198 }
1199 static bool is_instance(oop obj);
1200
1201 // Accessors for code generation:
1202 static int target_offset_in_bytes() { return _target_offset; }
1203 };
1204
1205 // Interface to java.lang.invoke.MethodHandleNatives$CallSiteContext objects
1206
1207 #define CALLSITECONTEXT_INJECTED_FIELDS(macro) \
1208 macro(java_lang_invoke_MethodHandleNatives_CallSiteContext, vmdependencies, intptr_signature, false)
1209
1210 class java_lang_invoke_MethodHandleNatives_CallSiteContext : AllStatic {
1211 friend class JavaClasses;
1212
1213 private:
1214 static int _vmdependencies_offset;
1215
1216 static void compute_offsets();
1217
1218 public:
1219 // Accessors
1220 static nmethodBucket* vmdependencies(oop context);
1221 static void set_vmdependencies(oop context, nmethodBucket* bucket);
1222
1223 // Testers
1224 static bool is_subclass(Klass* klass) {
1225 return klass->is_subclass_of(SystemDictionary::Context_klass());
1226 }
1227 static bool is_instance(oop obj);
1228 };
1229
1230 // Interface to java.security.AccessControlContext objects
1231
1232 class java_security_AccessControlContext: AllStatic {
1233 private:
1234 // Note that for this class the layout changed between JDK1.2 and JDK1.3,
1235 // so we compute the offsets at startup rather than hard-wiring them.
1236 static int _context_offset;
1237 static int _privilegedContext_offset;
1238 static int _isPrivileged_offset;
1239 static int _isAuthorized_offset;
1240
1241 static void compute_offsets();
1242 public:
1243 static oop create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS);
1244
1245 static bool is_authorized(Handle context);
1246
1247 // Debugging/initialization
1248 friend class JavaClasses;
1249 };
1250
1251
1252 // Interface to java.lang.ClassLoader objects
1253
1254 #define CLASSLOADER_INJECTED_FIELDS(macro) \
1255 macro(java_lang_ClassLoader, loader_data, intptr_signature, false)
1256
1257 class java_lang_ClassLoader : AllStatic {
1258 private:
1259 // The fake offsets are added by the class loader when java.lang.Class is loaded
1260 enum {
1261 hc_parent_offset = 0
1262 };
1263 static int _loader_data_offset;
1264 static bool offsets_computed;
1265 static int parent_offset;
1266 static int parallelCapable_offset;
1267
1268 public:
1269 static void compute_offsets();
1270
1271 static ClassLoaderData** loader_data_addr(oop loader);
1272 static ClassLoaderData* loader_data(oop loader);
1273
1274 static oop parent(oop loader);
1275 static bool isAncestor(oop loader, oop cl);
1276
1277 // Support for parallelCapable field
1278 static bool parallelCapable(oop the_class_mirror);
1279
1280 static bool is_trusted_loader(oop loader);
1281
1282 // Fix for 4474172
1283 static oop non_reflection_class_loader(oop loader);
1284
1285 // Testers
1286 static bool is_subclass(Klass* klass) {
1287 return klass->is_subclass_of(SystemDictionary::ClassLoader_klass());
1288 }
1289 static bool is_instance(oop obj);
1290
1291 // Debugging
1292 friend class JavaClasses;
1293 friend class ClassFileParser; // access to number_of_fake_fields
1294 };
1295
1296
1297 // Interface to java.lang.System objects
1298
1299 class java_lang_System : AllStatic {
1300 private:
1301 enum {
1302 hc_static_in_offset = 0,
1303 hc_static_out_offset = 1,
1304 hc_static_err_offset = 2,
1305 hc_static_security_offset = 3
1306 };
1307
1308 static int static_in_offset;
1309 static int static_out_offset;
1310 static int static_err_offset;
1311 static int static_security_offset;
1312
1313 public:
1314 static int in_offset_in_bytes();
1315 static int out_offset_in_bytes();
1316 static int err_offset_in_bytes();
1317
1318 static bool has_security_manager();
1319
1320 // Debugging
1321 friend class JavaClasses;
1322 };
1323
1324
1325 // Interface to java.lang.StackTraceElement objects
1326
1327 class java_lang_StackTraceElement: AllStatic {
1328 private:
1329 enum {
1330 hc_declaringClass_offset = 0,
1331 hc_methodName_offset = 1,
1332 hc_fileName_offset = 2,
1333 hc_lineNumber_offset = 3
1334 };
1335
1336 static int declaringClass_offset;
1337 static int methodName_offset;
1338 static int fileName_offset;
1339 static int lineNumber_offset;
1340
1341 public:
1342 // Setters
1343 static void set_declaringClass(oop element, oop value);
1344 static void set_methodName(oop element, oop value);
1345 static void set_fileName(oop element, oop value);
1346 static void set_lineNumber(oop element, int value);
1347
1348 // Create an instance of StackTraceElement
1349 static oop create(Handle mirror, int method, int version, int bci, int cpref, TRAPS);
1350 static oop create(methodHandle method, int bci, TRAPS);
1351
1352 // Debugging
1353 friend class JavaClasses;
1354 };
1355
1356
1357 // Interface to java.lang.AssertionStatusDirectives objects
1358
1359 class java_lang_AssertionStatusDirectives: AllStatic {
1360 private:
1361 enum {
1362 hc_classes_offset,
1363 hc_classEnabled_offset,
1364 hc_packages_offset,
1365 hc_packageEnabled_offset,
1366 hc_deflt_offset
1367 };
1368
1369 static int classes_offset;
1370 static int classEnabled_offset;
1371 static int packages_offset;
1372 static int packageEnabled_offset;
1373 static int deflt_offset;
1374
1375 public:
1376 // Setters
1377 static void set_classes(oop obj, oop val);
1378 static void set_classEnabled(oop obj, oop val);
1379 static void set_packages(oop obj, oop val);
1380 static void set_packageEnabled(oop obj, oop val);
1381 static void set_deflt(oop obj, bool val);
1382 // Debugging
1383 friend class JavaClasses;
1384 };
1385
1386
1387 class java_nio_Buffer: AllStatic {
1388 private:
1389 static int _limit_offset;
1390
1391 public:
1392 static int limit_offset();
1393 static void compute_offsets();
1394 };
1395
1396 class java_util_concurrent_locks_AbstractOwnableSynchronizer : AllStatic {
1397 private:
1398 static int _owner_offset;
1399 public:
1400 static void initialize(TRAPS);
1401 static oop get_owner_threadObj(oop obj);
1402 };
1403
1404 // Use to declare fields that need to be injected into Java classes
1405 // for the JVM to use. The name_index and signature_index are
1406 // declared in vmSymbols. The may_be_java flag is used to declare
1407 // fields that might already exist in Java but should be injected if
1408 // they don't. Otherwise the field is unconditionally injected and
1409 // the JVM uses the injected one. This is to ensure that name
1410 // collisions don't occur. In general may_be_java should be false
1411 // unless there's a good reason.
1412
1413 class InjectedField {
1414 public:
1415 const SystemDictionary::WKID klass_id;
1416 const vmSymbols::SID name_index;
1417 const vmSymbols::SID signature_index;
1418 const bool may_be_java;
1419
1420
1421 Klass* klass() const { return SystemDictionary::well_known_klass(klass_id); }
1422 Symbol* name() const { return lookup_symbol(name_index); }
1423 Symbol* signature() const { return lookup_symbol(signature_index); }
1424
1425 int compute_offset();
1426
1427 // Find the Symbol for this index
1428 static Symbol* lookup_symbol(int symbol_index) {
1429 return vmSymbols::symbol_at((vmSymbols::SID)symbol_index);
1430 }
1431 };
1432
1433 #define DECLARE_INJECTED_FIELD_ENUM(klass, name, signature, may_be_java) \
1434 klass##_##name##_enum,
1435
1436 #define ALL_INJECTED_FIELDS(macro) \
1437 CLASS_INJECTED_FIELDS(macro) \
1438 CLASSLOADER_INJECTED_FIELDS(macro) \
1439 MEMBERNAME_INJECTED_FIELDS(macro) \
1440 CALLSITECONTEXT_INJECTED_FIELDS(macro)
1441
1442 // Interface to hard-coded offset checking
1443
1444 class JavaClasses : AllStatic {
1445 private:
1446
1447 static InjectedField _injected_fields[];
1448
1449 static bool check_offset(const char *klass_name, int offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1450 static bool check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1451 static bool check_constant(const char *klass_name, int constant, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1452
1453 public:
1454 enum InjectedFieldID {
1455 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD_ENUM)
1456 MAX_enum
1457 };
1458
1459 static int compute_injected_offset(InjectedFieldID id);
1460
1461 static void compute_hard_coded_offsets();
1462 static void compute_offsets();
1463 static void check_offsets() PRODUCT_RETURN;
1464
1465 static InjectedField* get_injected(Symbol* class_name, int* field_count);
1466 };
1467
1468 #undef DECLARE_INJECTED_FIELD_ENUM
1469
1470 #endif // SHARE_VM_CLASSFILE_JAVACLASSES_HPP