1 /*
2 * Copyright (c) 1997, 2016, 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 hash_offset;
57 static int coder_offset;
58
59 static bool initialized;
60
61 static Handle basic_create(int length, bool byte_arr, TRAPS);
62
63 static inline void set_coder(oop string, jbyte coder);
64
65 public:
66
67 // Coders
68 enum Coder {
69 CODER_LATIN1 = 0,
70 CODER_UTF16 = 1
71 };
72
73 static void compute_offsets();
74
75 // Instance creation
76 static Handle create_from_unicode(jchar* unicode, int len, TRAPS);
77 static oop create_oop_from_unicode(jchar* unicode, int len, TRAPS);
78 static Handle create_from_str(const char* utf8_str, TRAPS);
79 static oop create_oop_from_str(const char* utf8_str, TRAPS);
80 static Handle create_from_symbol(Symbol* symbol, TRAPS);
81 static Handle create_from_platform_dependent_str(const char* str, TRAPS);
82 static Handle char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS);
83
84 static bool has_hash_field() {
85 assert(initialized, "Must be initialized");
86 return (hash_offset > 0);
87 }
88 static bool has_coder_field() {
89 assert(initialized, "Must be initialized");
90 return (coder_offset > 0);
91 }
92
93 static void set_compact_strings(bool value);
94
95 static int value_offset_in_bytes() {
96 assert(initialized && (value_offset > 0), "Must be initialized");
97 return value_offset;
98 }
99 static int hash_offset_in_bytes() {
100 assert(initialized && (hash_offset > 0), "Must be initialized");
101 return hash_offset;
102 }
103 static int coder_offset_in_bytes() {
104 assert(initialized && (coder_offset > 0), "Must be initialized");
105 return coder_offset;
106 }
107
108 static inline void set_value_raw(oop string, typeArrayOop buffer);
109 static inline void set_value(oop string, typeArrayOop buffer);
110 static inline void set_hash(oop string, unsigned int hash);
111
112 // Accessors
113 static inline typeArrayOop value(oop java_string);
114 static inline unsigned int hash(oop java_string);
115 static inline bool is_latin1(oop java_string);
116 static inline int length(oop java_string);
117 static int utf8_length(oop java_string);
118
119 // String converters
120 static char* as_utf8_string(oop java_string);
121 static char* as_utf8_string(oop java_string, char* buf, int buflen);
122 static char* as_utf8_string(oop java_string, int start, int len);
123 static char* as_utf8_string(oop java_string, int start, int len, char* buf, int buflen);
124 static char* as_platform_dependent_str(Handle java_string, TRAPS);
125 static jchar* as_unicode_string(oop java_string, int& length, TRAPS);
126 // produce an ascii string with all other values quoted using \u####
127 static char* as_quoted_ascii(oop java_string);
128
129 // Compute the hash value for a java.lang.String object which would
130 // contain the characters passed in.
131 //
132 // As the hash value used by the String object itself, in
133 // String.hashCode(). This value is normally calculated in Java code
134 // in the String.hashCode method(), but is precomputed for String
135 // objects in the shared archive file.
136 // hash P(31) from Kernighan & Ritchie
137 //
138 // For this reason, THIS ALGORITHM MUST MATCH String.hashCode().
139 static unsigned int hash_code(const jchar* s, int len) {
140 unsigned int h = 0;
141 while (len-- > 0) {
142 h = 31*h + (unsigned int) *s;
143 s++;
144 }
145 return h;
146 }
147
148 static unsigned int hash_code(const jbyte* s, int len) {
149 unsigned int h = 0;
150 while (len-- > 0) {
151 h = 31*h + (((unsigned int) *s) & 0xFF);
152 s++;
153 }
154 return h;
155 }
156
157 static unsigned int hash_code(oop java_string);
158 static unsigned int latin1_hash_code(typeArrayOop value, int len);
159
160 // This is the string hash code used by the StringTable, which may be
161 // the same as String.hashCode or an alternate hash code.
162 static unsigned int hash_string(oop java_string);
163
164 static bool equals(oop java_string, jchar* chars, int len);
165 static bool equals(oop str1, oop str2);
166
167 // Conversion between '.' and '/' formats
168 static Handle externalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '/', '.', THREAD); }
169 static Handle internalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '.', '/', THREAD); }
170
171 // Conversion
172 static Symbol* as_symbol(Handle java_string, TRAPS);
173 static Symbol* as_symbol_or_null(oop java_string);
174
175 // Testers
176 static bool is_instance(oop obj);
177 static inline bool is_instance_inlined(oop obj);
178
179 // Debugging
180 static void print(oop java_string, outputStream* st);
181 friend class JavaClasses;
182 friend class StringTable;
183 };
184
185
186 // Interface to java.lang.Class objects
187
188 #define CLASS_INJECTED_FIELDS(macro) \
189 macro(java_lang_Class, klass, intptr_signature, false) \
190 macro(java_lang_Class, array_klass, intptr_signature, false) \
191 macro(java_lang_Class, oop_size, int_signature, false) \
192 macro(java_lang_Class, static_oop_field_count, int_signature, false) \
193 macro(java_lang_Class, protection_domain, object_signature, false) \
194 macro(java_lang_Class, signers, object_signature, false)
195
196 class java_lang_Class : AllStatic {
197 friend class VMStructs;
198
199 private:
200 // The fake offsets are added by the class loader when java.lang.Class is loaded
201
202 static int _klass_offset;
203 static int _array_klass_offset;
204
205 static int _oop_size_offset;
206 static int _static_oop_field_count_offset;
207
208 static int _protection_domain_offset;
209 static int _init_lock_offset;
210 static int _signers_offset;
211 static int _class_loader_offset;
212 static int _component_mirror_offset;
213
214 static bool offsets_computed;
215 static int classRedefinedCount_offset;
216
217 static GrowableArray<Klass*>* _fixup_mirror_list;
218
219 static void set_init_lock(oop java_class, oop init_lock);
220 static void set_protection_domain(oop java_class, oop protection_domain);
221 static void set_class_loader(oop java_class, oop class_loader);
222 static void set_component_mirror(oop java_class, oop comp_mirror);
223 static void initialize_mirror_fields(KlassHandle k, Handle mirror, Handle protection_domain, TRAPS);
224 public:
225 static void compute_offsets();
226
227 // Instance creation
228 static void create_mirror(KlassHandle k, Handle class_loader,
229 Handle protection_domain, TRAPS);
230 static void fixup_mirror(KlassHandle k, TRAPS);
231 static oop create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS);
232 // Conversion
233 static Klass* as_Klass(oop java_class);
234 static void set_klass(oop java_class, Klass* klass);
235 static BasicType as_BasicType(oop java_class, Klass** reference_klass = NULL);
236 static BasicType as_BasicType(oop java_class, KlassHandle* reference_klass) {
237 Klass* refk_oop = NULL;
238 BasicType result = as_BasicType(java_class, &refk_oop);
239 (*reference_klass) = KlassHandle(refk_oop);
240 return result;
241 }
242 static Symbol* as_signature(oop java_class, bool intern_if_not_found, TRAPS);
243 static void print_signature(oop java_class, outputStream *st);
244 static const char* as_external_name(oop java_class);
245 // Testing
246 static bool is_instance(oop obj);
247
248 static bool is_primitive(oop java_class);
249 static BasicType primitive_type(oop java_class);
250 static oop primitive_mirror(BasicType t);
251 // JVM_NewArray support
252 static Klass* array_klass(oop java_class);
253 static void set_array_klass(oop java_class, Klass* klass);
254 // compiler support for class operations
255 static int klass_offset_in_bytes() { return _klass_offset; }
256 static int array_klass_offset_in_bytes() { return _array_klass_offset; }
257 // Support for classRedefinedCount field
258 static int classRedefinedCount(oop the_class_mirror);
259 static void set_classRedefinedCount(oop the_class_mirror, int value);
260
261 // Support for embedded per-class oops
262 static oop protection_domain(oop java_class);
263 static oop init_lock(oop java_class);
264 static oop component_mirror(oop java_class);
265 static objArrayOop signers(oop java_class);
266 static void set_signers(oop java_class, objArrayOop signers);
267
268 static oop class_loader(oop java_class);
269
270 static int oop_size(oop java_class);
271 static void set_oop_size(oop java_class, int size);
272 static int static_oop_field_count(oop java_class);
273 static void set_static_oop_field_count(oop java_class, int size);
274
275 static GrowableArray<Klass*>* fixup_mirror_list() {
276 return _fixup_mirror_list;
277 }
278 static void set_fixup_mirror_list(GrowableArray<Klass*>* v) {
279 _fixup_mirror_list = v;
280 }
281 // Debugging
282 friend class JavaClasses;
283 friend class InstanceKlass; // verification code accesses offsets
284 friend class ClassFileParser; // access to number_of_fake_fields
285 };
286
287 // Interface to java.lang.Thread objects
288
289 class java_lang_Thread : AllStatic {
290 private:
291 // Note that for this class the layout changed between JDK1.2 and JDK1.3,
292 // so we compute the offsets at startup rather than hard-wiring them.
293 static int _name_offset;
294 static int _group_offset;
295 static int _contextClassLoader_offset;
296 static int _inheritedAccessControlContext_offset;
297 static int _priority_offset;
298 static int _eetop_offset;
299 static int _daemon_offset;
300 static int _stillborn_offset;
301 static int _stackSize_offset;
302 static int _tid_offset;
303 static int _thread_status_offset;
304 static int _park_blocker_offset;
305 static int _park_event_offset ;
306
307 static void compute_offsets();
308
309 public:
310 // Instance creation
311 static oop create();
312 // Returns the JavaThread associated with the thread obj
313 static JavaThread* thread(oop java_thread);
314 // Set JavaThread for instance
315 static void set_thread(oop java_thread, JavaThread* thread);
316 // Name
317 static oop name(oop java_thread);
318 static void set_name(oop java_thread, oop name);
319 // Priority
320 static ThreadPriority priority(oop java_thread);
321 static void set_priority(oop java_thread, ThreadPriority priority);
322 // Thread group
323 static oop threadGroup(oop java_thread);
324 // Stillborn
325 static bool is_stillborn(oop java_thread);
326 static void set_stillborn(oop java_thread);
327 // Alive (NOTE: this is not really a field, but provides the correct
328 // definition without doing a Java call)
329 static bool is_alive(oop java_thread);
330 // Daemon
331 static bool is_daemon(oop java_thread);
332 static void set_daemon(oop java_thread);
333 // Context ClassLoader
334 static oop context_class_loader(oop java_thread);
335 // Control context
336 static oop inherited_access_control_context(oop java_thread);
337 // Stack size hint
338 static jlong stackSize(oop java_thread);
339 // Thread ID
340 static jlong thread_id(oop java_thread);
341
342 // Blocker object responsible for thread parking
343 static oop park_blocker(oop java_thread);
344
345 // Pointer to type-stable park handler, encoded as jlong.
346 // Should be set when apparently null
347 // For details, see unsafe.cpp Unsafe_Unpark
348 static jlong park_event(oop java_thread);
349 static bool set_park_event(oop java_thread, jlong ptr);
350
351 // Java Thread Status for JVMTI and M&M use.
352 // This thread status info is saved in threadStatus field of
353 // java.lang.Thread java class.
354 enum ThreadStatus {
355 NEW = 0,
356 RUNNABLE = JVMTI_THREAD_STATE_ALIVE + // runnable / running
357 JVMTI_THREAD_STATE_RUNNABLE,
358 SLEEPING = JVMTI_THREAD_STATE_ALIVE + // Thread.sleep()
359 JVMTI_THREAD_STATE_WAITING +
360 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
361 JVMTI_THREAD_STATE_SLEEPING,
362 IN_OBJECT_WAIT = JVMTI_THREAD_STATE_ALIVE + // Object.wait()
363 JVMTI_THREAD_STATE_WAITING +
364 JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
365 JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
366 IN_OBJECT_WAIT_TIMED = JVMTI_THREAD_STATE_ALIVE + // Object.wait(long)
367 JVMTI_THREAD_STATE_WAITING +
368 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
369 JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
370 PARKED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park()
371 JVMTI_THREAD_STATE_WAITING +
372 JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
373 JVMTI_THREAD_STATE_PARKED,
374 PARKED_TIMED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park(long)
375 JVMTI_THREAD_STATE_WAITING +
376 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
377 JVMTI_THREAD_STATE_PARKED,
378 BLOCKED_ON_MONITOR_ENTER = JVMTI_THREAD_STATE_ALIVE + // (re-)entering a synchronization block
379 JVMTI_THREAD_STATE_BLOCKED_ON_MONITOR_ENTER,
380 TERMINATED = JVMTI_THREAD_STATE_TERMINATED
381 };
382 // Write thread status info to threadStatus field of java.lang.Thread.
383 static void set_thread_status(oop java_thread_oop, ThreadStatus status);
384 // Read thread status info from threadStatus field of java.lang.Thread.
385 static ThreadStatus get_thread_status(oop java_thread_oop);
386
387 static const char* thread_status_name(oop java_thread_oop);
388
389 // Debugging
390 friend class JavaClasses;
391 };
392
393 // Interface to java.lang.ThreadGroup objects
394
395 class java_lang_ThreadGroup : AllStatic {
396 private:
397 static int _parent_offset;
398 static int _name_offset;
399 static int _threads_offset;
400 static int _groups_offset;
401 static int _maxPriority_offset;
402 static int _destroyed_offset;
403 static int _daemon_offset;
404 static int _vmAllowSuspension_offset;
405 static int _nthreads_offset;
406 static int _ngroups_offset;
407
408 static void compute_offsets();
409
410 public:
411 // parent ThreadGroup
412 static oop parent(oop java_thread_group);
413 // name
414 static const char* name(oop java_thread_group);
415 // ("name as oop" accessor is not necessary)
416 // Number of threads in group
417 static int nthreads(oop java_thread_group);
418 // threads
419 static objArrayOop threads(oop java_thread_group);
420 // Number of threads in group
421 static int ngroups(oop java_thread_group);
422 // groups
423 static objArrayOop groups(oop java_thread_group);
424 // maxPriority in group
425 static ThreadPriority maxPriority(oop java_thread_group);
426 // Destroyed
427 static bool is_destroyed(oop java_thread_group);
428 // Daemon
429 static bool is_daemon(oop java_thread_group);
430 // vmAllowSuspension
431 static bool is_vmAllowSuspension(oop java_thread_group);
432 // Debugging
433 friend class JavaClasses;
434 };
435
436
437
438 // Interface to java.lang.Throwable objects
439
440 class java_lang_Throwable: AllStatic {
441 friend class BacktraceBuilder;
442
443 private:
444 // Offsets
445 enum {
446 hc_backtrace_offset = 0,
447 hc_detailMessage_offset = 1,
448 hc_cause_offset = 2, // New since 1.4
449 hc_stackTrace_offset = 3 // New since 1.4
450 };
451 enum {
452 hc_static_unassigned_stacktrace_offset = 0 // New since 1.7
453 };
454 // Trace constants
455 enum {
456 trace_methods_offset = 0,
457 trace_bcis_offset = 1,
458 trace_mirrors_offset = 2,
459 trace_cprefs_offset = 3,
460 trace_next_offset = 4,
461 trace_size = 5,
462 trace_chunk_size = 32
463 };
464
465 static int backtrace_offset;
466 static int detailMessage_offset;
467 static int cause_offset;
468 static int stackTrace_offset;
469 static int static_unassigned_stacktrace_offset;
470
471 // Printing
472 static char* print_stack_element_to_buffer(Handle mirror, int method, int version, int bci, int cpref);
473 // StackTrace (programmatic access, new since 1.4)
474 static void clear_stacktrace(oop throwable);
475 // No stack trace available
476 static const char* no_stack_trace_message();
477 // Stacktrace (post JDK 1.7.0 to allow immutability protocol to be followed)
478 static void set_stacktrace(oop throwable, oop st_element_array);
479 static oop unassigned_stacktrace();
480
481 public:
482 // Backtrace
483 static oop backtrace(oop throwable);
484 static void set_backtrace(oop throwable, oop value);
485 // Needed by JVMTI to filter out this internal field.
486 static int get_backtrace_offset() { return backtrace_offset;}
487 static int get_detailMessage_offset() { return detailMessage_offset;}
488 // Message
489 static oop message(oop throwable);
490 static oop message(Handle throwable);
491 static void set_message(oop throwable, oop value);
492 static Symbol* detail_message(oop throwable);
493 static void print_stack_element(outputStream *st, Handle mirror, int method,
494 int version, int bci, int cpref);
495 static void print_stack_element(outputStream *st, const methodHandle& method, int bci);
496 static void print_stack_usage(Handle stream);
497
498 // Allocate space for backtrace (created but stack trace not filled in)
499 static void allocate_backtrace(Handle throwable, TRAPS);
500 // Fill in current stack trace for throwable with preallocated backtrace (no GC)
501 static void fill_in_stack_trace_of_preallocated_backtrace(Handle throwable);
502 // Fill in current stack trace, can cause GC
503 static void fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS);
504 static void fill_in_stack_trace(Handle throwable, const methodHandle& method = methodHandle());
505 // Programmatic access to stack trace
506 static oop get_stack_trace_element(oop throwable, int index, TRAPS);
507 static int get_stack_trace_depth(oop throwable, TRAPS);
508 // Printing
509 static void print(oop throwable, outputStream* st);
510 static void print(Handle throwable, outputStream* st);
511 static void print_stack_trace(oop throwable, outputStream* st);
512 // Debugging
513 friend class JavaClasses;
514 };
515
516
517 // Interface to java.lang.reflect.AccessibleObject objects
518
519 class java_lang_reflect_AccessibleObject: AllStatic {
520 private:
521 // Note that to reduce dependencies on the JDK we compute these
522 // offsets at run-time.
523 static int override_offset;
524
525 static void compute_offsets();
526
527 public:
528 // Accessors
529 static jboolean override(oop reflect);
530 static void set_override(oop reflect, jboolean value);
531
532 // Debugging
533 friend class JavaClasses;
534 };
535
536
537 // Interface to java.lang.reflect.Method objects
538
539 class java_lang_reflect_Method : public java_lang_reflect_AccessibleObject {
540 private:
541 // Note that to reduce dependencies on the JDK we compute these
542 // offsets at run-time.
543 static int clazz_offset;
544 static int name_offset;
545 static int returnType_offset;
546 static int parameterTypes_offset;
547 static int exceptionTypes_offset;
548 static int slot_offset;
549 static int modifiers_offset;
550 static int signature_offset;
551 static int annotations_offset;
552 static int parameter_annotations_offset;
553 static int annotation_default_offset;
554 static int type_annotations_offset;
555
556 static void compute_offsets();
557
558 public:
559 // Allocation
560 static Handle create(TRAPS);
561
562 // Accessors
563 static oop clazz(oop reflect);
564 static void set_clazz(oop reflect, oop value);
565
566 static oop name(oop method);
567 static void set_name(oop method, oop value);
568
569 static oop return_type(oop method);
570 static void set_return_type(oop method, oop value);
571
572 static oop parameter_types(oop method);
573 static void set_parameter_types(oop method, oop value);
574
575 static oop exception_types(oop method);
576 static void set_exception_types(oop method, oop value);
577
578 static int slot(oop reflect);
579 static void set_slot(oop reflect, int value);
580
581 static int modifiers(oop method);
582 static void set_modifiers(oop method, int value);
583
584 static bool has_signature_field();
585 static oop signature(oop method);
586 static void set_signature(oop method, oop value);
587
588 static bool has_annotations_field();
589 static oop annotations(oop method);
590 static void set_annotations(oop method, oop value);
591
592 static bool has_parameter_annotations_field();
593 static oop parameter_annotations(oop method);
594 static void set_parameter_annotations(oop method, oop value);
595
596 static bool has_annotation_default_field();
597 static oop annotation_default(oop method);
598 static void set_annotation_default(oop method, oop value);
599
600 static bool has_type_annotations_field();
601 static oop type_annotations(oop method);
602 static void set_type_annotations(oop method, oop value);
603
604 // Debugging
605 friend class JavaClasses;
606 };
607
608
609 // Interface to java.lang.reflect.Constructor objects
610
611 class java_lang_reflect_Constructor : public java_lang_reflect_AccessibleObject {
612 private:
613 // Note that to reduce dependencies on the JDK we compute these
614 // offsets at run-time.
615 static int clazz_offset;
616 static int parameterTypes_offset;
617 static int exceptionTypes_offset;
618 static int slot_offset;
619 static int modifiers_offset;
620 static int signature_offset;
621 static int annotations_offset;
622 static int parameter_annotations_offset;
623 static int type_annotations_offset;
624
625 static void compute_offsets();
626
627 public:
628 // Allocation
629 static Handle create(TRAPS);
630
631 // Accessors
632 static oop clazz(oop reflect);
633 static void set_clazz(oop reflect, oop value);
634
635 static oop parameter_types(oop constructor);
636 static void set_parameter_types(oop constructor, oop value);
637
638 static oop exception_types(oop constructor);
639 static void set_exception_types(oop constructor, oop value);
640
641 static int slot(oop reflect);
642 static void set_slot(oop reflect, int value);
643
644 static int modifiers(oop constructor);
645 static void set_modifiers(oop constructor, int value);
646
647 static bool has_signature_field();
648 static oop signature(oop constructor);
649 static void set_signature(oop constructor, oop value);
650
651 static bool has_annotations_field();
652 static oop annotations(oop constructor);
653 static void set_annotations(oop constructor, oop value);
654
655 static bool has_parameter_annotations_field();
656 static oop parameter_annotations(oop method);
657 static void set_parameter_annotations(oop method, oop value);
658
659 static bool has_type_annotations_field();
660 static oop type_annotations(oop constructor);
661 static void set_type_annotations(oop constructor, oop value);
662
663 // Debugging
664 friend class JavaClasses;
665 };
666
667
668 // Interface to java.lang.reflect.Field objects
669
670 class java_lang_reflect_Field : public java_lang_reflect_AccessibleObject {
671 private:
672 // Note that to reduce dependencies on the JDK we compute these
673 // offsets at run-time.
674 static int clazz_offset;
675 static int name_offset;
676 static int type_offset;
677 static int slot_offset;
678 static int modifiers_offset;
679 static int signature_offset;
680 static int annotations_offset;
681 static int type_annotations_offset;
682
683 static void compute_offsets();
684
685 public:
686 // Allocation
687 static Handle create(TRAPS);
688
689 // Accessors
690 static oop clazz(oop reflect);
691 static void set_clazz(oop reflect, oop value);
692
693 static oop name(oop field);
694 static void set_name(oop field, oop value);
695
696 static oop type(oop field);
697 static void set_type(oop field, oop value);
698
699 static int slot(oop reflect);
700 static void set_slot(oop reflect, int value);
701
702 static int modifiers(oop field);
703 static void set_modifiers(oop field, int value);
704
705 static bool has_signature_field();
706 static oop signature(oop constructor);
707 static void set_signature(oop constructor, oop value);
708
709 static bool has_annotations_field();
710 static oop annotations(oop constructor);
711 static void set_annotations(oop constructor, oop value);
712
713 static bool has_parameter_annotations_field();
714 static oop parameter_annotations(oop method);
715 static void set_parameter_annotations(oop method, oop value);
716
717 static bool has_annotation_default_field();
718 static oop annotation_default(oop method);
719 static void set_annotation_default(oop method, oop value);
720
721 static bool has_type_annotations_field();
722 static oop type_annotations(oop field);
723 static void set_type_annotations(oop field, oop value);
724
725 // Debugging
726 friend class JavaClasses;
727 };
728
729 class java_lang_reflect_Parameter {
730 private:
731 // Note that to reduce dependencies on the JDK we compute these
732 // offsets at run-time.
733 static int name_offset;
734 static int modifiers_offset;
735 static int index_offset;
736 static int executable_offset;
737
738 static void compute_offsets();
739
740 public:
741 // Allocation
742 static Handle create(TRAPS);
743
744 // Accessors
745 static oop name(oop field);
746 static void set_name(oop field, oop value);
747
748 static int index(oop reflect);
749 static void set_index(oop reflect, int value);
750
751 static int modifiers(oop reflect);
752 static void set_modifiers(oop reflect, int value);
753
754 static oop executable(oop constructor);
755 static void set_executable(oop constructor, oop value);
756
757 friend class JavaClasses;
758 };
759
760 // Interface to sun.reflect.ConstantPool objects
761 class sun_reflect_ConstantPool {
762 private:
763 // Note that to reduce dependencies on the JDK we compute these
764 // offsets at run-time.
765 static int _oop_offset;
766
767 static void compute_offsets();
768
769 public:
770 // Allocation
771 static Handle create(TRAPS);
772
773 // Accessors
774 static void set_cp(oop reflect, ConstantPool* value);
775 static int oop_offset() {
776 return _oop_offset;
777 }
778
779 static ConstantPool* get_cp(oop reflect);
780
781 // Debugging
782 friend class JavaClasses;
783 };
784
785 // Interface to sun.reflect.UnsafeStaticFieldAccessorImpl objects
786 class sun_reflect_UnsafeStaticFieldAccessorImpl {
787 private:
788 static int _base_offset;
789 static void compute_offsets();
790
791 public:
792 static int base_offset() {
793 return _base_offset;
794 }
795
796 // Debugging
797 friend class JavaClasses;
798 };
799
800 // Interface to java.lang primitive type boxing objects:
801 // - java.lang.Boolean
802 // - java.lang.Character
803 // - java.lang.Float
804 // - java.lang.Double
805 // - java.lang.Byte
806 // - java.lang.Short
807 // - java.lang.Integer
808 // - java.lang.Long
809
810 // This could be separated out into 8 individual classes.
811
812 class java_lang_boxing_object: AllStatic {
813 private:
814 enum {
815 hc_value_offset = 0
816 };
817 static int value_offset;
818 static int long_value_offset;
819
820 static oop initialize_and_allocate(BasicType type, TRAPS);
821 public:
822 // Allocation. Returns a boxed value, or NULL for invalid type.
823 static oop create(BasicType type, jvalue* value, TRAPS);
824 // Accessors. Returns the basic type being boxed, or T_ILLEGAL for invalid oop.
825 static BasicType get_value(oop box, jvalue* value);
826 static BasicType set_value(oop box, jvalue* value);
827 static BasicType basic_type(oop box);
828 static bool is_instance(oop box) { return basic_type(box) != T_ILLEGAL; }
829 static bool is_instance(oop box, BasicType type) { return basic_type(box) == type; }
830 static void print(oop box, outputStream* st) { jvalue value; print(get_value(box, &value), &value, st); }
831 static void print(BasicType type, jvalue* value, outputStream* st);
832
833 static int value_offset_in_bytes(BasicType type) {
834 return ( type == T_LONG || type == T_DOUBLE ) ? long_value_offset :
835 value_offset;
836 }
837
838 // Debugging
839 friend class JavaClasses;
840 };
841
842
843
844 // Interface to java.lang.ref.Reference objects
845
846 class java_lang_ref_Reference: AllStatic {
847 public:
848 enum {
849 hc_referent_offset = 0,
850 hc_queue_offset = 1,
851 hc_next_offset = 2,
852 hc_discovered_offset = 3 // Is not last, see SoftRefs.
853 };
854 enum {
855 hc_static_lock_offset = 0,
856 hc_static_pending_offset = 1
857 };
858
859 static int referent_offset;
860 static int queue_offset;
861 static int next_offset;
862 static int discovered_offset;
863 static int static_lock_offset;
864 static int static_pending_offset;
865 static int number_of_fake_oop_fields;
866
867 // Accessors
868 static inline oop referent(oop ref);
869 static inline void set_referent(oop ref, oop value);
870 static inline void set_referent_raw(oop ref, oop value);
871 static inline HeapWord* referent_addr(oop ref);
872 static inline oop next(oop ref);
873 static inline void set_next(oop ref, oop value);
874 static inline void set_next_raw(oop ref, oop value);
875 static inline HeapWord* next_addr(oop ref);
876 static inline oop discovered(oop ref);
877 static inline void set_discovered(oop ref, oop value);
878 static inline void set_discovered_raw(oop ref, oop value);
879 static inline HeapWord* discovered_addr(oop ref);
880
881 // Accessors for statics
882 static oop pending_list_lock();
883 static oop pending_list();
884
885 static HeapWord* pending_list_lock_addr();
886 static HeapWord* pending_list_addr();
887 };
888
889
890 // Interface to java.lang.ref.SoftReference objects
891
892 class java_lang_ref_SoftReference: public java_lang_ref_Reference {
893 public:
894 enum {
895 // The timestamp is a long field and may need to be adjusted for alignment.
896 hc_timestamp_offset = hc_discovered_offset + 1
897 };
898 enum {
899 hc_static_clock_offset = 0
900 };
901
902 static int timestamp_offset;
903 static int static_clock_offset;
904
905 // Accessors
906 static jlong timestamp(oop ref);
907
908 // Accessors for statics
909 static jlong clock();
910 static void set_clock(jlong value);
911 };
912
913 // Interface to java.lang.invoke.MethodHandle objects
914
915 class MethodHandleEntry;
916
917 class java_lang_invoke_MethodHandle: AllStatic {
918 friend class JavaClasses;
919
920 private:
921 static int _type_offset; // the MethodType of this MH
922 static int _form_offset; // the LambdaForm of this MH
923
924 static void compute_offsets();
925
926 public:
927 // Accessors
928 static oop type(oop mh);
929 static void set_type(oop mh, oop mtype);
930
931 static oop form(oop mh);
932 static void set_form(oop mh, oop lform);
933
934 // Testers
935 static bool is_subclass(Klass* klass) {
936 return klass->is_subclass_of(SystemDictionary::MethodHandle_klass());
937 }
938 static bool is_instance(oop obj);
939
940 // Accessors for code generation:
941 static int type_offset_in_bytes() { return _type_offset; }
942 static int form_offset_in_bytes() { return _form_offset; }
943 };
944
945 // Interface to java.lang.invoke.DirectMethodHandle objects
946
947 class java_lang_invoke_DirectMethodHandle: AllStatic {
948 friend class JavaClasses;
949
950 private:
951 static int _member_offset; // the MemberName of this DMH
952
953 static void compute_offsets();
954
955 public:
956 // Accessors
957 static oop member(oop mh);
958
959 // Testers
960 static bool is_subclass(Klass* klass) {
961 return klass->is_subclass_of(SystemDictionary::DirectMethodHandle_klass());
962 }
963 static bool is_instance(oop obj);
964
965 // Accessors for code generation:
966 static int member_offset_in_bytes() { return _member_offset; }
967 };
968
969 // Interface to java.lang.invoke.LambdaForm objects
970 // (These are a private interface for managing adapter code generation.)
971
972 class java_lang_invoke_LambdaForm: AllStatic {
973 friend class JavaClasses;
974
975 private:
976 static int _vmentry_offset; // type is MemberName
977
978 static void compute_offsets();
979
980 public:
981 // Accessors
982 static oop vmentry(oop lform);
983 static void set_vmentry(oop lform, oop invoker);
984
985 // Testers
986 static bool is_subclass(Klass* klass) {
987 return SystemDictionary::LambdaForm_klass() != NULL &&
988 klass->is_subclass_of(SystemDictionary::LambdaForm_klass());
989 }
990 static bool is_instance(oop obj);
991
992 // Accessors for code generation:
993 static int vmentry_offset_in_bytes() { return _vmentry_offset; }
994 };
995
996
997 // Interface to java.lang.invoke.MemberName objects
998 // (These are a private interface for Java code to query the class hierarchy.)
999
1000 #define MEMBERNAME_INJECTED_FIELDS(macro) \
1001 macro(java_lang_invoke_MemberName, vmloader, object_signature, false) \
1002 macro(java_lang_invoke_MemberName, vmindex, intptr_signature, false) \
1003 macro(java_lang_invoke_MemberName, vmtarget, intptr_signature, false)
1004
1005 class java_lang_invoke_MemberName: AllStatic {
1006 friend class JavaClasses;
1007
1008 private:
1009 // From java.lang.invoke.MemberName:
1010 // private Class<?> clazz; // class in which the method is defined
1011 // private String name; // may be null if not yet materialized
1012 // private Object type; // may be null if not yet materialized
1013 // private int flags; // modifier bits; see reflect.Modifier
1014 // private intptr vmtarget; // VM-specific target value
1015 // private intptr_t vmindex; // member index within class or interface
1016 static int _clazz_offset;
1017 static int _name_offset;
1018 static int _type_offset;
1019 static int _flags_offset;
1020 static int _vmtarget_offset;
1021 static int _vmloader_offset;
1022 static int _vmindex_offset;
1023
1024 static void compute_offsets();
1025
1026 public:
1027 // Accessors
1028 static oop clazz(oop mname);
1029 static void set_clazz(oop mname, oop clazz);
1030
1031 static oop type(oop mname);
1032 static void set_type(oop mname, oop type);
1033
1034 static oop name(oop mname);
1035 static void set_name(oop mname, oop name);
1036
1037 static int flags(oop mname);
1038 static void set_flags(oop mname, int flags);
1039
1040 static Metadata* vmtarget(oop mname);
1041 static void set_vmtarget(oop mname, Metadata* target);
1042
1043 static intptr_t vmindex(oop mname);
1044 static void set_vmindex(oop mname, intptr_t index);
1045
1046 // Testers
1047 static bool is_subclass(Klass* klass) {
1048 return klass->is_subclass_of(SystemDictionary::MemberName_klass());
1049 }
1050 static bool is_instance(oop obj);
1051
1052 static bool is_method(oop obj);
1053
1054 // Relevant integer codes (keep these in synch. with MethodHandleNatives.Constants):
1055 enum {
1056 MN_IS_METHOD = 0x00010000, // method (not constructor)
1057 MN_IS_CONSTRUCTOR = 0x00020000, // constructor
1058 MN_IS_FIELD = 0x00040000, // field
1059 MN_IS_TYPE = 0x00080000, // nested type
1060 MN_CALLER_SENSITIVE = 0x00100000, // @CallerSensitive annotation detected
1061 MN_REFERENCE_KIND_SHIFT = 24, // refKind
1062 MN_REFERENCE_KIND_MASK = 0x0F000000 >> MN_REFERENCE_KIND_SHIFT,
1063 // The SEARCH_* bits are not for MN.flags but for the matchFlags argument of MHN.getMembers:
1064 MN_SEARCH_SUPERCLASSES = 0x00100000, // walk super classes
1065 MN_SEARCH_INTERFACES = 0x00200000 // walk implemented interfaces
1066 };
1067
1068 // Accessors for code generation:
1069 static int clazz_offset_in_bytes() { return _clazz_offset; }
1070 static int type_offset_in_bytes() { return _type_offset; }
1071 static int name_offset_in_bytes() { return _name_offset; }
1072 static int flags_offset_in_bytes() { return _flags_offset; }
1073 static int vmtarget_offset_in_bytes() { return _vmtarget_offset; }
1074 static int vmindex_offset_in_bytes() { return _vmindex_offset; }
1075 };
1076
1077
1078 // Interface to java.lang.invoke.MethodType objects
1079
1080 class java_lang_invoke_MethodType: AllStatic {
1081 friend class JavaClasses;
1082
1083 private:
1084 static int _rtype_offset;
1085 static int _ptypes_offset;
1086
1087 static void compute_offsets();
1088
1089 public:
1090 // Accessors
1091 static oop rtype(oop mt);
1092 static objArrayOop ptypes(oop mt);
1093
1094 static oop ptype(oop mt, int index);
1095 static int ptype_count(oop mt);
1096
1097 static int ptype_slot_count(oop mt); // extra counts for long/double
1098 static int rtype_slot_count(oop mt); // extra counts for long/double
1099
1100 static Symbol* as_signature(oop mt, bool intern_if_not_found, TRAPS);
1101 static void print_signature(oop mt, outputStream* st);
1102
1103 static bool is_instance(oop obj);
1104
1105 static bool equals(oop mt1, oop mt2);
1106
1107 // Accessors for code generation:
1108 static int rtype_offset_in_bytes() { return _rtype_offset; }
1109 static int ptypes_offset_in_bytes() { return _ptypes_offset; }
1110 };
1111
1112
1113 // Interface to java.lang.invoke.CallSite objects
1114
1115 class java_lang_invoke_CallSite: AllStatic {
1116 friend class JavaClasses;
1117
1118 private:
1119 static int _target_offset;
1120 static int _context_offset;
1121
1122 static void compute_offsets();
1123
1124 public:
1125 // Accessors
1126 static oop target( oop site);
1127 static void set_target( oop site, oop target);
1128 static void set_target_volatile( oop site, oop target);
1129
1130 static oop context(oop site);
1131
1132 // Testers
1133 static bool is_subclass(Klass* klass) {
1134 return klass->is_subclass_of(SystemDictionary::CallSite_klass());
1135 }
1136 static bool is_instance(oop obj);
1137
1138 // Accessors for code generation:
1139 static int target_offset_in_bytes() { return _target_offset; }
1140 };
1141
1142 // Interface to java.lang.invoke.MethodHandleNatives$CallSiteContext objects
1143
1144 #define CALLSITECONTEXT_INJECTED_FIELDS(macro) \
1145 macro(java_lang_invoke_MethodHandleNatives_CallSiteContext, vmdependencies, intptr_signature, false)
1146
1147 class DependencyContext;
1148
1149 class java_lang_invoke_MethodHandleNatives_CallSiteContext : AllStatic {
1150 friend class JavaClasses;
1151
1152 private:
1153 static int _vmdependencies_offset;
1154
1155 static void compute_offsets();
1156
1157 public:
1158 // Accessors
1159 static DependencyContext vmdependencies(oop context);
1160
1161 // Testers
1162 static bool is_subclass(Klass* klass) {
1163 return klass->is_subclass_of(SystemDictionary::Context_klass());
1164 }
1165 static bool is_instance(oop obj);
1166 };
1167
1168 // Interface to java.security.AccessControlContext objects
1169
1170 class java_security_AccessControlContext: AllStatic {
1171 private:
1172 // Note that for this class the layout changed between JDK1.2 and JDK1.3,
1173 // so we compute the offsets at startup rather than hard-wiring them.
1174 static int _context_offset;
1175 static int _privilegedContext_offset;
1176 static int _isPrivileged_offset;
1177 static int _isAuthorized_offset;
1178
1179 static void compute_offsets();
1180 public:
1181 static oop create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS);
1182
1183 static bool is_authorized(Handle context);
1184
1185 // Debugging/initialization
1186 friend class JavaClasses;
1187 };
1188
1189
1190 // Interface to java.lang.ClassLoader objects
1191
1192 #define CLASSLOADER_INJECTED_FIELDS(macro) \
1193 macro(java_lang_ClassLoader, loader_data, intptr_signature, false)
1194
1195 class java_lang_ClassLoader : AllStatic {
1196 private:
1197 // The fake offsets are added by the class loader when java.lang.Class is loaded
1198 enum {
1199 hc_parent_offset = 0
1200 };
1201 static int _loader_data_offset;
1202 static bool offsets_computed;
1203 static int parent_offset;
1204 static int parallelCapable_offset;
1205
1206 public:
1207 static void compute_offsets();
1208
1209 static ClassLoaderData** loader_data_addr(oop loader);
1210 static ClassLoaderData* loader_data(oop loader);
1211
1212 static oop parent(oop loader);
1213 static bool isAncestor(oop loader, oop cl);
1214
1215 // Support for parallelCapable field
1216 static bool parallelCapable(oop the_class_mirror);
1217
1218 static bool is_trusted_loader(oop loader);
1219
1220 // Fix for 4474172
1221 static oop non_reflection_class_loader(oop loader);
1222
1223 // Testers
1224 static bool is_subclass(Klass* klass) {
1225 return klass->is_subclass_of(SystemDictionary::ClassLoader_klass());
1226 }
1227 static bool is_instance(oop obj);
1228
1229 // Debugging
1230 friend class JavaClasses;
1231 friend class ClassFileParser; // access to number_of_fake_fields
1232 };
1233
1234
1235 // Interface to java.lang.System objects
1236
1237 class java_lang_System : AllStatic {
1238 private:
1239 enum {
1240 hc_static_in_offset = 0,
1241 hc_static_out_offset = 1,
1242 hc_static_err_offset = 2,
1243 hc_static_security_offset = 3
1244 };
1245
1246 static int static_in_offset;
1247 static int static_out_offset;
1248 static int static_err_offset;
1249 static int static_security_offset;
1250
1251 public:
1252 static int in_offset_in_bytes();
1253 static int out_offset_in_bytes();
1254 static int err_offset_in_bytes();
1255
1256 static bool has_security_manager();
1257
1258 // Debugging
1259 friend class JavaClasses;
1260 };
1261
1262
1263 // Interface to java.lang.StackTraceElement objects
1264
1265 class java_lang_StackTraceElement: AllStatic {
1266 private:
1267 enum {
1268 hc_declaringClass_offset = 0,
1269 hc_methodName_offset = 1,
1270 hc_fileName_offset = 2,
1271 hc_lineNumber_offset = 3
1272 };
1273
1274 static int declaringClass_offset;
1275 static int methodName_offset;
1276 static int fileName_offset;
1277 static int lineNumber_offset;
1278
1279 public:
1280 // Setters
1281 static void set_declaringClass(oop element, oop value);
1282 static void set_methodName(oop element, oop value);
1283 static void set_fileName(oop element, oop value);
1284 static void set_lineNumber(oop element, int value);
1285
1286 // Create an instance of StackTraceElement
1287 static oop create(Handle mirror, int method, int version, int bci, int cpref, TRAPS);
1288 static oop create(const methodHandle& method, int bci, TRAPS);
1289
1290 // Debugging
1291 friend class JavaClasses;
1292 };
1293
1294
1295 class Backtrace: AllStatic {
1296 public:
1297 // Helper backtrace functions to store bci|version together.
1298 static int merge_bci_and_version(int bci, int version);
1299 static int merge_mid_and_cpref(int mid, int cpref);
1300 static int bci_at(unsigned int merged);
1301 static int version_at(unsigned int merged);
1302 static int mid_at(unsigned int merged);
1303 static int cpref_at(unsigned int merged);
1304 static int get_line_number(const methodHandle& method, int bci);
1305 static Symbol* get_source_file_name(InstanceKlass* holder, int version);
1306
1307 // Debugging
1308 friend class JavaClasses;
1309 };
1310
1311 // Interface to java.lang.StackFrameInfo objects
1312
1313 #define STACKFRAMEINFO_INJECTED_FIELDS(macro) \
1314 macro(java_lang_StackFrameInfo, mid, short_signature, false) \
1315 macro(java_lang_StackFrameInfo, version, short_signature, false) \
1316 macro(java_lang_StackFrameInfo, cpref, short_signature, false)
1317
1318 class java_lang_StackFrameInfo: AllStatic {
1319 private:
1320 static int _declaringClass_offset;
1321 static int _memberName_offset;
1322 static int _bci_offset;
1323 static int _methodName_offset;
1324 static int _fileName_offset;
1325 static int _lineNumber_offset;
1326
1327 static int _mid_offset;
1328 static int _version_offset;
1329 static int _cpref_offset;
1330
1331 static Method* get_method(Handle stackFrame, InstanceKlass* holder, TRAPS);
1332 static Symbol* get_file_name(Handle stackFrame, InstanceKlass* holder);
1333
1334 public:
1335 // Setters
1336 static void set_declaringClass(oop info, oop value);
1337 static void set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci);
1338 static void set_bci(oop info, int value);
1339
1340 // set method info in an instance of StackFrameInfo
1341 static void fill_methodInfo(Handle info, TRAPS);
1342 static void set_methodName(oop info, oop value);
1343 static void set_fileName(oop info, oop value);
1344 static void set_lineNumber(oop info, int value);
1345
1346 // these injected fields are only used if -XX:-MemberNameInStackFrame set
1347 static void set_mid(oop info, short value);
1348 static void set_version(oop info, short value);
1349 static void set_cpref(oop info, short value);
1350
1351 static void compute_offsets();
1352
1353 // Debugging
1354 friend class JavaClasses;
1355 };
1356
1357 class java_lang_LiveStackFrameInfo: AllStatic {
1358 private:
1359 static int _monitors_offset;
1360 static int _locals_offset;
1361 static int _operands_offset;
1362
1363 public:
1364 static void set_monitors(oop info, oop value);
1365 static void set_locals(oop info, oop value);
1366 static void set_operands(oop info, oop value);
1367
1368 static void compute_offsets();
1369
1370 // Debugging
1371 friend class JavaClasses;
1372 };
1373
1374 // Interface to java.lang.AssertionStatusDirectives objects
1375
1376 class java_lang_AssertionStatusDirectives: AllStatic {
1377 private:
1378 enum {
1379 hc_classes_offset,
1380 hc_classEnabled_offset,
1381 hc_packages_offset,
1382 hc_packageEnabled_offset,
1383 hc_deflt_offset
1384 };
1385
1386 static int classes_offset;
1387 static int classEnabled_offset;
1388 static int packages_offset;
1389 static int packageEnabled_offset;
1390 static int deflt_offset;
1391
1392 public:
1393 // Setters
1394 static void set_classes(oop obj, oop val);
1395 static void set_classEnabled(oop obj, oop val);
1396 static void set_packages(oop obj, oop val);
1397 static void set_packageEnabled(oop obj, oop val);
1398 static void set_deflt(oop obj, bool val);
1399 // Debugging
1400 friend class JavaClasses;
1401 };
1402
1403
1404 class java_nio_Buffer: AllStatic {
1405 private:
1406 static int _limit_offset;
1407
1408 public:
1409 static int limit_offset();
1410 static void compute_offsets();
1411 };
1412
1413 class java_util_concurrent_locks_AbstractOwnableSynchronizer : AllStatic {
1414 private:
1415 static int _owner_offset;
1416 public:
1417 static void initialize(TRAPS);
1418 static oop get_owner_threadObj(oop obj);
1419 };
1420
1421 // Use to declare fields that need to be injected into Java classes
1422 // for the JVM to use. The name_index and signature_index are
1423 // declared in vmSymbols. The may_be_java flag is used to declare
1424 // fields that might already exist in Java but should be injected if
1425 // they don't. Otherwise the field is unconditionally injected and
1426 // the JVM uses the injected one. This is to ensure that name
1427 // collisions don't occur. In general may_be_java should be false
1428 // unless there's a good reason.
1429
1430 class InjectedField {
1431 public:
1432 const SystemDictionary::WKID klass_id;
1433 const vmSymbols::SID name_index;
1434 const vmSymbols::SID signature_index;
1435 const bool may_be_java;
1436
1437
1438 Klass* klass() const { return SystemDictionary::well_known_klass(klass_id); }
1439 Symbol* name() const { return lookup_symbol(name_index); }
1440 Symbol* signature() const { return lookup_symbol(signature_index); }
1441
1442 int compute_offset();
1443
1444 // Find the Symbol for this index
1445 static Symbol* lookup_symbol(int symbol_index) {
1446 return vmSymbols::symbol_at((vmSymbols::SID)symbol_index);
1447 }
1448 };
1449
1450 #define DECLARE_INJECTED_FIELD_ENUM(klass, name, signature, may_be_java) \
1451 klass##_##name##_enum,
1452
1453 #define ALL_INJECTED_FIELDS(macro) \
1454 CLASS_INJECTED_FIELDS(macro) \
1455 CLASSLOADER_INJECTED_FIELDS(macro) \
1456 MEMBERNAME_INJECTED_FIELDS(macro) \
1457 CALLSITECONTEXT_INJECTED_FIELDS(macro) \
1458 STACKFRAMEINFO_INJECTED_FIELDS(macro)
1459
1460
1461 // Interface to hard-coded offset checking
1462
1463 class JavaClasses : AllStatic {
1464 private:
1465
1466 static InjectedField _injected_fields[];
1467
1468 static bool check_offset(const char *klass_name, int offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1469 static bool check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1470 static bool check_constant(const char *klass_name, int constant, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1471
1472 public:
1473 enum InjectedFieldID {
1474 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD_ENUM)
1475 MAX_enum
1476 };
1477
1478 static int compute_injected_offset(InjectedFieldID id);
1479
1480 static void compute_hard_coded_offsets();
1481 static void compute_offsets();
1482 static void check_offsets() PRODUCT_RETURN;
1483
1484 static InjectedField* get_injected(Symbol* class_name, int* field_count);
1485 };
1486
1487 #undef DECLARE_INJECTED_FIELD_ENUM
1488
1489 #endif // SHARE_VM_CLASSFILE_JAVACLASSES_HPP