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
159 static bool equals(oop java_string, jchar* chars, int len);
160 static bool equals(oop str1, oop str2);
161
162 // Conversion between '.' and '/' formats
163 static Handle externalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '/', '.', THREAD); }
164 static Handle internalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '.', '/', THREAD); }
165
166 // Conversion
167 static Symbol* as_symbol(Handle java_string, TRAPS);
168 static Symbol* as_symbol_or_null(oop java_string);
169
170 // Testers
171 static bool is_instance(oop obj);
172 static inline bool is_instance_inlined(oop obj);
173
174 // Debugging
175 static void print(oop java_string, outputStream* st);
176 friend class JavaClasses;
177 friend class StringTable;
178 };
179
180
181 // Interface to java.lang.Class objects
182
183 #define CLASS_INJECTED_FIELDS(macro) \
184 macro(java_lang_Class, klass, intptr_signature, false) \
185 macro(java_lang_Class, array_klass, intptr_signature, false) \
186 macro(java_lang_Class, oop_size, int_signature, false) \
187 macro(java_lang_Class, static_oop_field_count, int_signature, false) \
188 macro(java_lang_Class, protection_domain, object_signature, false) \
189 macro(java_lang_Class, signers, object_signature, false)
190
191 class java_lang_Class : AllStatic {
192 friend class VMStructs;
193 friend class JVMCIVMStructs;
194
195 private:
196 // The fake offsets are added by the class loader when java.lang.Class is loaded
197
198 static int _klass_offset;
199 static int _array_klass_offset;
200
201 static int _oop_size_offset;
202 static int _static_oop_field_count_offset;
203
204 static int _protection_domain_offset;
205 static int _init_lock_offset;
206 static int _signers_offset;
207 static int _class_loader_offset;
208 static int _module_offset;
209 static int _component_mirror_offset;
210
211 static bool offsets_computed;
212 static int classRedefinedCount_offset;
213
214 static GrowableArray<Klass*>* _fixup_mirror_list;
215 static GrowableArray<Klass*>* _fixup_module_field_list;
216
217 static void set_init_lock(oop java_class, oop init_lock);
218 static void set_protection_domain(oop java_class, oop protection_domain);
219 static void set_class_loader(oop java_class, oop class_loader);
220 static void set_component_mirror(oop java_class, oop comp_mirror);
221 static void initialize_mirror_fields(KlassHandle k, Handle mirror, Handle protection_domain, TRAPS);
222 static void set_mirror_module_field(KlassHandle K, Handle mirror, Handle module, TRAPS);
223 public:
224 static void compute_offsets();
225
226 // Instance creation
227 static void create_mirror(KlassHandle k, Handle class_loader, Handle module,
228 Handle protection_domain, TRAPS);
229 static void fixup_mirror(KlassHandle k, TRAPS);
230 static oop create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS);
231
232 static void fixup_module_field(KlassHandle k, Handle module);
233
234 // Conversion
235 static Klass* as_Klass(oop java_class);
236 static void set_klass(oop java_class, Klass* klass);
237 static BasicType as_BasicType(oop java_class, Klass** reference_klass = NULL);
238 static BasicType as_BasicType(oop java_class, KlassHandle* reference_klass) {
239 Klass* refk_oop = NULL;
240 BasicType result = as_BasicType(java_class, &refk_oop);
241 (*reference_klass) = KlassHandle(refk_oop);
242 return result;
243 }
244 static Symbol* as_signature(oop java_class, bool intern_if_not_found, TRAPS);
245 static void print_signature(oop java_class, outputStream *st);
246 static const char* as_external_name(oop java_class);
247 // Testing
248 static bool is_instance(oop obj);
249
250 static bool is_primitive(oop java_class);
251 static BasicType primitive_type(oop java_class);
252 static oop primitive_mirror(BasicType t);
253 // JVM_NewArray support
254 static Klass* array_klass(oop java_class);
255 static void set_array_klass(oop java_class, Klass* klass);
256 // compiler support for class operations
257 static int klass_offset_in_bytes() { return _klass_offset; }
258 static int array_klass_offset_in_bytes() { return _array_klass_offset; }
259 // Support for classRedefinedCount field
260 static int classRedefinedCount(oop the_class_mirror);
261 static void set_classRedefinedCount(oop the_class_mirror, int value);
262
263 // Support for embedded per-class oops
264 static oop protection_domain(oop java_class);
265 static oop init_lock(oop java_class);
266 static oop component_mirror(oop java_class);
267 static objArrayOop signers(oop java_class);
268 static void set_signers(oop java_class, objArrayOop signers);
269
270 static oop class_loader(oop java_class);
271 static void set_module(oop java_class, oop module);
272 static oop module(oop java_class);
273
274 static int oop_size(oop java_class);
275 static void set_oop_size(oop java_class, int size);
276 static int static_oop_field_count(oop java_class);
277 static void set_static_oop_field_count(oop java_class, int size);
278
279 static GrowableArray<Klass*>* fixup_mirror_list() {
280 return _fixup_mirror_list;
281 }
282 static void set_fixup_mirror_list(GrowableArray<Klass*>* v) {
283 _fixup_mirror_list = v;
284 }
285
286 static GrowableArray<Klass*>* fixup_module_field_list() {
287 return _fixup_module_field_list;
288 }
289 static void set_fixup_module_field_list(GrowableArray<Klass*>* v) {
290 _fixup_module_field_list = v;
291 }
292
293 // Debugging
294 friend class JavaClasses;
295 friend class InstanceKlass; // verification code accesses offsets
296 friend class ClassFileParser; // access to number_of_fake_fields
297 };
298
299 // Interface to java.lang.Thread objects
300
301 class java_lang_Thread : AllStatic {
302 private:
303 // Note that for this class the layout changed between JDK1.2 and JDK1.3,
304 // so we compute the offsets at startup rather than hard-wiring them.
305 static int _name_offset;
306 static int _group_offset;
307 static int _contextClassLoader_offset;
308 static int _inheritedAccessControlContext_offset;
309 static int _priority_offset;
310 static int _eetop_offset;
311 static int _daemon_offset;
312 static int _stillborn_offset;
313 static int _stackSize_offset;
314 static int _tid_offset;
315 static int _thread_status_offset;
316 static int _park_blocker_offset;
317 static int _park_event_offset ;
318
319 static void compute_offsets();
320
321 public:
322 // Instance creation
323 static oop create();
324 // Returns the JavaThread associated with the thread obj
325 static JavaThread* thread(oop java_thread);
326 // Set JavaThread for instance
327 static void set_thread(oop java_thread, JavaThread* thread);
328 // Name
329 static oop name(oop java_thread);
330 static void set_name(oop java_thread, oop name);
331 // Priority
332 static ThreadPriority priority(oop java_thread);
333 static void set_priority(oop java_thread, ThreadPriority priority);
334 // Thread group
335 static oop threadGroup(oop java_thread);
336 // Stillborn
337 static bool is_stillborn(oop java_thread);
338 static void set_stillborn(oop java_thread);
339 // Alive (NOTE: this is not really a field, but provides the correct
340 // definition without doing a Java call)
341 static bool is_alive(oop java_thread);
342 // Daemon
343 static bool is_daemon(oop java_thread);
344 static void set_daemon(oop java_thread);
345 // Context ClassLoader
346 static oop context_class_loader(oop java_thread);
347 // Control context
348 static oop inherited_access_control_context(oop java_thread);
349 // Stack size hint
350 static jlong stackSize(oop java_thread);
351 // Thread ID
352 static jlong thread_id(oop java_thread);
353
354 // Blocker object responsible for thread parking
355 static oop park_blocker(oop java_thread);
356
357 // Pointer to type-stable park handler, encoded as jlong.
358 // Should be set when apparently null
359 // For details, see unsafe.cpp Unsafe_Unpark
360 static jlong park_event(oop java_thread);
361 static bool set_park_event(oop java_thread, jlong ptr);
362
363 // Java Thread Status for JVMTI and M&M use.
364 // This thread status info is saved in threadStatus field of
365 // java.lang.Thread java class.
366 enum ThreadStatus {
367 NEW = 0,
368 RUNNABLE = JVMTI_THREAD_STATE_ALIVE + // runnable / running
369 JVMTI_THREAD_STATE_RUNNABLE,
370 SLEEPING = JVMTI_THREAD_STATE_ALIVE + // Thread.sleep()
371 JVMTI_THREAD_STATE_WAITING +
372 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
373 JVMTI_THREAD_STATE_SLEEPING,
374 IN_OBJECT_WAIT = JVMTI_THREAD_STATE_ALIVE + // Object.wait()
375 JVMTI_THREAD_STATE_WAITING +
376 JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
377 JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
378 IN_OBJECT_WAIT_TIMED = JVMTI_THREAD_STATE_ALIVE + // Object.wait(long)
379 JVMTI_THREAD_STATE_WAITING +
380 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
381 JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
382 PARKED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park()
383 JVMTI_THREAD_STATE_WAITING +
384 JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
385 JVMTI_THREAD_STATE_PARKED,
386 PARKED_TIMED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park(long)
387 JVMTI_THREAD_STATE_WAITING +
388 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
389 JVMTI_THREAD_STATE_PARKED,
390 BLOCKED_ON_MONITOR_ENTER = JVMTI_THREAD_STATE_ALIVE + // (re-)entering a synchronization block
391 JVMTI_THREAD_STATE_BLOCKED_ON_MONITOR_ENTER,
392 TERMINATED = JVMTI_THREAD_STATE_TERMINATED
393 };
394 // Write thread status info to threadStatus field of java.lang.Thread.
395 static void set_thread_status(oop java_thread_oop, ThreadStatus status);
396 // Read thread status info from threadStatus field of java.lang.Thread.
397 static ThreadStatus get_thread_status(oop java_thread_oop);
398
399 static const char* thread_status_name(oop java_thread_oop);
400
401 // Debugging
402 friend class JavaClasses;
403 };
404
405 // Interface to java.lang.ThreadGroup objects
406
407 class java_lang_ThreadGroup : AllStatic {
408 private:
409 static int _parent_offset;
410 static int _name_offset;
411 static int _threads_offset;
412 static int _groups_offset;
413 static int _maxPriority_offset;
414 static int _destroyed_offset;
415 static int _daemon_offset;
416 static int _nthreads_offset;
417 static int _ngroups_offset;
418
419 static void compute_offsets();
420
421 public:
422 // parent ThreadGroup
423 static oop parent(oop java_thread_group);
424 // name
425 static const char* name(oop java_thread_group);
426 // ("name as oop" accessor is not necessary)
427 // Number of threads in group
428 static int nthreads(oop java_thread_group);
429 // threads
430 static objArrayOop threads(oop java_thread_group);
431 // Number of threads in group
432 static int ngroups(oop java_thread_group);
433 // groups
434 static objArrayOop groups(oop java_thread_group);
435 // maxPriority in group
436 static ThreadPriority maxPriority(oop java_thread_group);
437 // Destroyed
438 static bool is_destroyed(oop java_thread_group);
439 // Daemon
440 static bool is_daemon(oop java_thread_group);
441 // Debugging
442 friend class JavaClasses;
443 };
444
445
446
447 // Interface to java.lang.Throwable objects
448
449 class java_lang_Throwable: AllStatic {
450 friend class BacktraceBuilder;
451 friend class BacktraceIterator;
452
453 private:
454 // Offsets
455 enum {
456 hc_backtrace_offset = 0,
457 hc_detailMessage_offset = 1,
458 hc_cause_offset = 2, // New since 1.4
459 hc_stackTrace_offset = 3 // New since 1.4
460 };
461 enum {
462 hc_static_unassigned_stacktrace_offset = 0 // New since 1.7
463 };
464 // Trace constants
465 enum {
466 trace_methods_offset = 0,
467 trace_bcis_offset = 1,
468 trace_mirrors_offset = 2,
469 trace_cprefs_offset = 3,
470 trace_next_offset = 4,
471 trace_size = 5,
472 trace_chunk_size = 32
473 };
474
475 static int backtrace_offset;
476 static int detailMessage_offset;
477 static int stackTrace_offset;
478 static int depth_offset;
479 static int static_unassigned_stacktrace_offset;
480
481 // StackTrace (programmatic access, new since 1.4)
482 static void clear_stacktrace(oop throwable);
483 // Stacktrace (post JDK 1.7.0 to allow immutability protocol to be followed)
484 static void set_stacktrace(oop throwable, oop st_element_array);
485 static oop unassigned_stacktrace();
486
487 public:
488 // Backtrace
489 static oop backtrace(oop throwable);
490 static void set_backtrace(oop throwable, oop value);
491 static int depth(oop throwable);
492 static void set_depth(oop throwable, int value);
493 // Needed by JVMTI to filter out this internal field.
494 static int get_backtrace_offset() { return backtrace_offset;}
495 static int get_detailMessage_offset() { return detailMessage_offset;}
496 // Message
497 static oop message(Handle throwable);
498 static void set_message(oop throwable, oop value);
499 static Symbol* detail_message(oop throwable);
500 static void print_stack_element(outputStream *st, const methodHandle& method, int bci);
501 static void print_stack_usage(Handle stream);
502
503 static void compute_offsets();
504
505 // Allocate space for backtrace (created but stack trace not filled in)
506 static void allocate_backtrace(Handle throwable, TRAPS);
507 // Fill in current stack trace for throwable with preallocated backtrace (no GC)
508 static void fill_in_stack_trace_of_preallocated_backtrace(Handle throwable);
509 // Fill in current stack trace, can cause GC
510 static void fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS);
511 static void fill_in_stack_trace(Handle throwable, const methodHandle& method = methodHandle());
512 // Programmatic access to stack trace
513 static void get_stack_trace_elements(Handle throwable, objArrayHandle stack_trace, TRAPS);
514 // Printing
515 static void print(Handle throwable, outputStream* st);
516 static void print_stack_trace(Handle throwable, outputStream* st);
517 static void java_printStackTrace(Handle throwable, TRAPS);
518 // Debugging
519 friend class JavaClasses;
520 };
521
522
523 // Interface to java.lang.reflect.AccessibleObject objects
524
525 class java_lang_reflect_AccessibleObject: AllStatic {
526 private:
527 // Note that to reduce dependencies on the JDK we compute these
528 // offsets at run-time.
529 static int override_offset;
530
531 static void compute_offsets();
532
533 public:
534 // Accessors
535 static jboolean override(oop reflect);
536 static void set_override(oop reflect, jboolean value);
537
538 // Debugging
539 friend class JavaClasses;
540 };
541
542
543 // Interface to java.lang.reflect.Method objects
544
545 class java_lang_reflect_Method : public java_lang_reflect_AccessibleObject {
546 private:
547 // Note that to reduce dependencies on the JDK we compute these
548 // offsets at run-time.
549 static int clazz_offset;
550 static int name_offset;
551 static int returnType_offset;
552 static int parameterTypes_offset;
553 static int exceptionTypes_offset;
554 static int slot_offset;
555 static int modifiers_offset;
556 static int signature_offset;
557 static int annotations_offset;
558 static int parameter_annotations_offset;
559 static int annotation_default_offset;
560 static int type_annotations_offset;
561
562 static void compute_offsets();
563
564 public:
565 // Allocation
566 static Handle create(TRAPS);
567
568 // Accessors
569 static oop clazz(oop reflect);
570 static void set_clazz(oop reflect, oop value);
571
572 static oop name(oop method);
573 static void set_name(oop method, oop value);
574
575 static oop return_type(oop method);
576 static void set_return_type(oop method, oop value);
577
578 static oop parameter_types(oop method);
579 static void set_parameter_types(oop method, oop value);
580
581 static oop exception_types(oop method);
582 static void set_exception_types(oop method, oop value);
583
584 static int slot(oop reflect);
585 static void set_slot(oop reflect, int value);
586
587 static int modifiers(oop method);
588 static void set_modifiers(oop method, int value);
589
590 static bool has_signature_field();
591 static oop signature(oop method);
592 static void set_signature(oop method, oop value);
593
594 static bool has_annotations_field();
595 static oop annotations(oop method);
596 static void set_annotations(oop method, oop value);
597
598 static bool has_parameter_annotations_field();
599 static oop parameter_annotations(oop method);
600 static void set_parameter_annotations(oop method, oop value);
601
602 static bool has_annotation_default_field();
603 static oop annotation_default(oop method);
604 static void set_annotation_default(oop method, oop value);
605
606 static bool has_type_annotations_field();
607 static oop type_annotations(oop method);
608 static void set_type_annotations(oop method, oop value);
609
610 // Debugging
611 friend class JavaClasses;
612 };
613
614
615 // Interface to java.lang.reflect.Constructor objects
616
617 class java_lang_reflect_Constructor : public java_lang_reflect_AccessibleObject {
618 private:
619 // Note that to reduce dependencies on the JDK we compute these
620 // offsets at run-time.
621 static int clazz_offset;
622 static int parameterTypes_offset;
623 static int exceptionTypes_offset;
624 static int slot_offset;
625 static int modifiers_offset;
626 static int signature_offset;
627 static int annotations_offset;
628 static int parameter_annotations_offset;
629 static int type_annotations_offset;
630
631 static void compute_offsets();
632
633 public:
634 // Allocation
635 static Handle create(TRAPS);
636
637 // Accessors
638 static oop clazz(oop reflect);
639 static void set_clazz(oop reflect, oop value);
640
641 static oop parameter_types(oop constructor);
642 static void set_parameter_types(oop constructor, oop value);
643
644 static oop exception_types(oop constructor);
645 static void set_exception_types(oop constructor, oop value);
646
647 static int slot(oop reflect);
648 static void set_slot(oop reflect, int value);
649
650 static int modifiers(oop constructor);
651 static void set_modifiers(oop constructor, int value);
652
653 static bool has_signature_field();
654 static oop signature(oop constructor);
655 static void set_signature(oop constructor, oop value);
656
657 static bool has_annotations_field();
658 static oop annotations(oop constructor);
659 static void set_annotations(oop constructor, oop value);
660
661 static bool has_parameter_annotations_field();
662 static oop parameter_annotations(oop method);
663 static void set_parameter_annotations(oop method, oop value);
664
665 static bool has_type_annotations_field();
666 static oop type_annotations(oop constructor);
667 static void set_type_annotations(oop constructor, oop value);
668
669 // Debugging
670 friend class JavaClasses;
671 };
672
673
674 // Interface to java.lang.reflect.Field objects
675
676 class java_lang_reflect_Field : public java_lang_reflect_AccessibleObject {
677 private:
678 // Note that to reduce dependencies on the JDK we compute these
679 // offsets at run-time.
680 static int clazz_offset;
681 static int name_offset;
682 static int type_offset;
683 static int slot_offset;
684 static int modifiers_offset;
685 static int signature_offset;
686 static int annotations_offset;
687 static int type_annotations_offset;
688
689 static void compute_offsets();
690
691 public:
692 // Allocation
693 static Handle create(TRAPS);
694
695 // Accessors
696 static oop clazz(oop reflect);
697 static void set_clazz(oop reflect, oop value);
698
699 static oop name(oop field);
700 static void set_name(oop field, oop value);
701
702 static oop type(oop field);
703 static void set_type(oop field, oop value);
704
705 static int slot(oop reflect);
706 static void set_slot(oop reflect, int value);
707
708 static int modifiers(oop field);
709 static void set_modifiers(oop field, int value);
710
711 static bool has_signature_field();
712 static oop signature(oop constructor);
713 static void set_signature(oop constructor, oop value);
714
715 static bool has_annotations_field();
716 static oop annotations(oop constructor);
717 static void set_annotations(oop constructor, oop value);
718
719 static bool has_parameter_annotations_field();
720 static oop parameter_annotations(oop method);
721 static void set_parameter_annotations(oop method, oop value);
722
723 static bool has_annotation_default_field();
724 static oop annotation_default(oop method);
725 static void set_annotation_default(oop method, oop value);
726
727 static bool has_type_annotations_field();
728 static oop type_annotations(oop field);
729 static void set_type_annotations(oop field, oop value);
730
731 // Debugging
732 friend class JavaClasses;
733 };
734
735 class java_lang_reflect_Parameter {
736 private:
737 // Note that to reduce dependencies on the JDK we compute these
738 // offsets at run-time.
739 static int name_offset;
740 static int modifiers_offset;
741 static int index_offset;
742 static int executable_offset;
743
744 static void compute_offsets();
745
746 public:
747 // Allocation
748 static Handle create(TRAPS);
749
750 // Accessors
751 static oop name(oop field);
752 static void set_name(oop field, oop value);
753
754 static int index(oop reflect);
755 static void set_index(oop reflect, int value);
756
757 static int modifiers(oop reflect);
758 static void set_modifiers(oop reflect, int value);
759
760 static oop executable(oop constructor);
761 static void set_executable(oop constructor, oop value);
762
763 friend class JavaClasses;
764 };
765
766 #define MODULE_INJECTED_FIELDS(macro) \
767 macro(java_lang_reflect_Module, module_entry, intptr_signature, false)
768
769 class java_lang_reflect_Module {
770 private:
771 static int loader_offset;
772 static int name_offset;
773 static int _module_entry_offset;
774 static void compute_offsets();
775
776 public:
777 // Allocation
778 static Handle create(Handle loader, Handle module_name, TRAPS);
779
780 // Testers
781 static bool is_instance(oop obj);
782
783 // Accessors
784 static oop loader(oop module);
785 static void set_loader(oop module, oop value);
786
787 static oop name(oop module);
788 static void set_name(oop module, oop value);
789
790 static ModuleEntry* module_entry(oop module, TRAPS);
791 static void set_module_entry(oop module, ModuleEntry* module_entry);
792
793 friend class JavaClasses;
794 };
795
796 // Interface to jdk.internal.reflect.ConstantPool objects
797 class reflect_ConstantPool {
798 private:
799 // Note that to reduce dependencies on the JDK we compute these
800 // offsets at run-time.
801 static int _oop_offset;
802
803 static void compute_offsets();
804
805 public:
806 // Allocation
807 static Handle create(TRAPS);
808
809 // Accessors
810 static void set_cp(oop reflect, ConstantPool* value);
811 static int oop_offset() {
812 return _oop_offset;
813 }
814
815 static ConstantPool* get_cp(oop reflect);
816
817 // Debugging
818 friend class JavaClasses;
819 };
820
821 // Interface to jdk.internal.reflect.UnsafeStaticFieldAccessorImpl objects
822 class reflect_UnsafeStaticFieldAccessorImpl {
823 private:
824 static int _base_offset;
825 static void compute_offsets();
826
827 public:
828 static int base_offset() {
829 return _base_offset;
830 }
831
832 // Debugging
833 friend class JavaClasses;
834 };
835
836 // Interface to java.lang primitive type boxing objects:
837 // - java.lang.Boolean
838 // - java.lang.Character
839 // - java.lang.Float
840 // - java.lang.Double
841 // - java.lang.Byte
842 // - java.lang.Short
843 // - java.lang.Integer
844 // - java.lang.Long
845
846 // This could be separated out into 8 individual classes.
847
848 class java_lang_boxing_object: AllStatic {
849 private:
850 enum {
851 hc_value_offset = 0
852 };
853 static int value_offset;
854 static int long_value_offset;
855
856 static oop initialize_and_allocate(BasicType type, TRAPS);
857 public:
858 // Allocation. Returns a boxed value, or NULL for invalid type.
859 static oop create(BasicType type, jvalue* value, TRAPS);
860 // Accessors. Returns the basic type being boxed, or T_ILLEGAL for invalid oop.
861 static BasicType get_value(oop box, jvalue* value);
862 static BasicType set_value(oop box, jvalue* value);
863 static BasicType basic_type(oop box);
864 static bool is_instance(oop box) { return basic_type(box) != T_ILLEGAL; }
865 static bool is_instance(oop box, BasicType type) { return basic_type(box) == type; }
866 static void print(oop box, outputStream* st) { jvalue value; print(get_value(box, &value), &value, st); }
867 static void print(BasicType type, jvalue* value, outputStream* st);
868
869 static int value_offset_in_bytes(BasicType type) {
870 return ( type == T_LONG || type == T_DOUBLE ) ? long_value_offset :
871 value_offset;
872 }
873
874 // Debugging
875 friend class JavaClasses;
876 };
877
878
879
880 // Interface to java.lang.ref.Reference objects
881
882 class java_lang_ref_Reference: AllStatic {
883 public:
884 enum {
885 hc_referent_offset = 0,
886 hc_queue_offset = 1,
887 hc_next_offset = 2,
888 hc_discovered_offset = 3 // Is not last, see SoftRefs.
889 };
890
891 static int referent_offset;
892 static int queue_offset;
893 static int next_offset;
894 static int discovered_offset;
895 static int number_of_fake_oop_fields;
896
897 // Accessors
898 static inline oop referent(oop ref);
899 static inline void set_referent(oop ref, oop value);
900 static inline void set_referent_raw(oop ref, oop value);
901 static inline HeapWord* referent_addr(oop ref);
902 static inline oop next(oop ref);
903 static inline void set_next(oop ref, oop value);
904 static inline void set_next_raw(oop ref, oop value);
905 static inline HeapWord* next_addr(oop ref);
906 static inline oop discovered(oop ref);
907 static inline void set_discovered(oop ref, oop value);
908 static inline void set_discovered_raw(oop ref, oop value);
909 static inline HeapWord* discovered_addr(oop ref);
910 };
911
912
913 // Interface to java.lang.ref.SoftReference objects
914
915 class java_lang_ref_SoftReference: public java_lang_ref_Reference {
916 public:
917 enum {
918 // The timestamp is a long field and may need to be adjusted for alignment.
919 hc_timestamp_offset = hc_discovered_offset + 1
920 };
921 enum {
922 hc_static_clock_offset = 0
923 };
924
925 static int timestamp_offset;
926 static int static_clock_offset;
927
928 // Accessors
929 static jlong timestamp(oop ref);
930
931 // Accessors for statics
932 static jlong clock();
933 static void set_clock(jlong value);
934 };
935
936 // Interface to java.lang.invoke.MethodHandle objects
937
938 class MethodHandleEntry;
939
940 class java_lang_invoke_MethodHandle: AllStatic {
941 friend class JavaClasses;
942
943 private:
944 static int _type_offset; // the MethodType of this MH
945 static int _form_offset; // the LambdaForm of this MH
946
947 static void compute_offsets();
948
949 public:
950 // Accessors
951 static oop type(oop mh);
952 static void set_type(oop mh, oop mtype);
953
954 static oop form(oop mh);
955 static void set_form(oop mh, oop lform);
956
957 // Testers
958 static bool is_subclass(Klass* klass) {
959 return klass->is_subclass_of(SystemDictionary::MethodHandle_klass());
960 }
961 static bool is_instance(oop obj);
962
963 // Accessors for code generation:
964 static int type_offset_in_bytes() { return _type_offset; }
965 static int form_offset_in_bytes() { return _form_offset; }
966 };
967
968 // Interface to java.lang.invoke.DirectMethodHandle objects
969
970 class java_lang_invoke_DirectMethodHandle: AllStatic {
971 friend class JavaClasses;
972
973 private:
974 static int _member_offset; // the MemberName of this DMH
975
976 static void compute_offsets();
977
978 public:
979 // Accessors
980 static oop member(oop mh);
981
982 // Testers
983 static bool is_subclass(Klass* klass) {
984 return klass->is_subclass_of(SystemDictionary::DirectMethodHandle_klass());
985 }
986 static bool is_instance(oop obj);
987
988 // Accessors for code generation:
989 static int member_offset_in_bytes() { return _member_offset; }
990 };
991
992 // Interface to java.lang.invoke.LambdaForm objects
993 // (These are a private interface for managing adapter code generation.)
994
995 class java_lang_invoke_LambdaForm: AllStatic {
996 friend class JavaClasses;
997
998 private:
999 static int _vmentry_offset; // type is MemberName
1000
1001 static void compute_offsets();
1002
1003 public:
1004 // Accessors
1005 static oop vmentry(oop lform);
1006 static void set_vmentry(oop lform, oop invoker);
1007
1008 // Testers
1009 static bool is_subclass(Klass* klass) {
1010 return SystemDictionary::LambdaForm_klass() != NULL &&
1011 klass->is_subclass_of(SystemDictionary::LambdaForm_klass());
1012 }
1013 static bool is_instance(oop obj);
1014
1015 // Accessors for code generation:
1016 static int vmentry_offset_in_bytes() { return _vmentry_offset; }
1017 };
1018
1019
1020 // Interface to java.lang.invoke.MemberName objects
1021 // (These are a private interface for Java code to query the class hierarchy.)
1022
1023 #define MEMBERNAME_INJECTED_FIELDS(macro) \
1024 macro(java_lang_invoke_MemberName, vmloader, object_signature, false) \
1025 macro(java_lang_invoke_MemberName, vmindex, intptr_signature, false) \
1026 macro(java_lang_invoke_MemberName, vmtarget, intptr_signature, false)
1027
1028 class java_lang_invoke_MemberName: AllStatic {
1029 friend class JavaClasses;
1030
1031 private:
1032 // From java.lang.invoke.MemberName:
1033 // private Class<?> clazz; // class in which the method is defined
1034 // private String name; // may be null if not yet materialized
1035 // private Object type; // may be null if not yet materialized
1036 // private int flags; // modifier bits; see reflect.Modifier
1037 // private intptr vmtarget; // VM-specific target value
1038 // private intptr_t vmindex; // member index within class or interface
1039 static int _clazz_offset;
1040 static int _name_offset;
1041 static int _type_offset;
1042 static int _flags_offset;
1043 static int _vmtarget_offset;
1044 static int _vmloader_offset;
1045 static int _vmindex_offset;
1046
1047 static void compute_offsets();
1048
1049 public:
1050 // Accessors
1051 static oop clazz(oop mname);
1052 static void set_clazz(oop mname, oop clazz);
1053
1054 static oop type(oop mname);
1055 static void set_type(oop mname, oop type);
1056
1057 static oop name(oop mname);
1058 static void set_name(oop mname, oop name);
1059
1060 static int flags(oop mname);
1061 static void set_flags(oop mname, int flags);
1062
1063 static Metadata* vmtarget(oop mname);
1064 static void set_vmtarget(oop mname, Metadata* target);
1065
1066 static intptr_t vmindex(oop mname);
1067 static void set_vmindex(oop mname, intptr_t index);
1068
1069 // Testers
1070 static bool is_subclass(Klass* klass) {
1071 return klass->is_subclass_of(SystemDictionary::MemberName_klass());
1072 }
1073 static bool is_instance(oop obj);
1074
1075 static bool is_method(oop obj);
1076
1077 // Relevant integer codes (keep these in synch. with MethodHandleNatives.Constants):
1078 enum {
1079 MN_IS_METHOD = 0x00010000, // method (not constructor)
1080 MN_IS_CONSTRUCTOR = 0x00020000, // constructor
1081 MN_IS_FIELD = 0x00040000, // field
1082 MN_IS_TYPE = 0x00080000, // nested type
1083 MN_CALLER_SENSITIVE = 0x00100000, // @CallerSensitive annotation detected
1084 MN_REFERENCE_KIND_SHIFT = 24, // refKind
1085 MN_REFERENCE_KIND_MASK = 0x0F000000 >> MN_REFERENCE_KIND_SHIFT,
1086 // The SEARCH_* bits are not for MN.flags but for the matchFlags argument of MHN.getMembers:
1087 MN_SEARCH_SUPERCLASSES = 0x00100000, // walk super classes
1088 MN_SEARCH_INTERFACES = 0x00200000 // walk implemented interfaces
1089 };
1090
1091 // Accessors for code generation:
1092 static int clazz_offset_in_bytes() { return _clazz_offset; }
1093 static int type_offset_in_bytes() { return _type_offset; }
1094 static int name_offset_in_bytes() { return _name_offset; }
1095 static int flags_offset_in_bytes() { return _flags_offset; }
1096 static int vmtarget_offset_in_bytes() { return _vmtarget_offset; }
1097 static int vmindex_offset_in_bytes() { return _vmindex_offset; }
1098 };
1099
1100
1101 // Interface to java.lang.invoke.MethodType objects
1102
1103 class java_lang_invoke_MethodType: AllStatic {
1104 friend class JavaClasses;
1105
1106 private:
1107 static int _rtype_offset;
1108 static int _ptypes_offset;
1109
1110 static void compute_offsets();
1111
1112 public:
1113 // Accessors
1114 static oop rtype(oop mt);
1115 static objArrayOop ptypes(oop mt);
1116
1117 static oop ptype(oop mt, int index);
1118 static int ptype_count(oop mt);
1119
1120 static int ptype_slot_count(oop mt); // extra counts for long/double
1121 static int rtype_slot_count(oop mt); // extra counts for long/double
1122
1123 static Symbol* as_signature(oop mt, bool intern_if_not_found, TRAPS);
1124 static void print_signature(oop mt, outputStream* st);
1125
1126 static bool is_instance(oop obj);
1127
1128 static bool equals(oop mt1, oop mt2);
1129
1130 // Accessors for code generation:
1131 static int rtype_offset_in_bytes() { return _rtype_offset; }
1132 static int ptypes_offset_in_bytes() { return _ptypes_offset; }
1133 };
1134
1135
1136 // Interface to java.lang.invoke.CallSite objects
1137
1138 class java_lang_invoke_CallSite: AllStatic {
1139 friend class JavaClasses;
1140
1141 private:
1142 static int _target_offset;
1143 static int _context_offset;
1144
1145 static void compute_offsets();
1146
1147 public:
1148 // Accessors
1149 static oop target( oop site);
1150 static void set_target( oop site, oop target);
1151 static void set_target_volatile( oop site, oop target);
1152
1153 static oop context(oop site);
1154
1155 // Testers
1156 static bool is_subclass(Klass* klass) {
1157 return klass->is_subclass_of(SystemDictionary::CallSite_klass());
1158 }
1159 static bool is_instance(oop obj);
1160
1161 // Accessors for code generation:
1162 static int target_offset_in_bytes() { return _target_offset; }
1163 };
1164
1165 // Interface to java.lang.invoke.MethodHandleNatives$CallSiteContext objects
1166
1167 #define CALLSITECONTEXT_INJECTED_FIELDS(macro) \
1168 macro(java_lang_invoke_MethodHandleNatives_CallSiteContext, vmdependencies, intptr_signature, false)
1169
1170 class DependencyContext;
1171
1172 class java_lang_invoke_MethodHandleNatives_CallSiteContext : AllStatic {
1173 friend class JavaClasses;
1174
1175 private:
1176 static int _vmdependencies_offset;
1177
1178 static void compute_offsets();
1179
1180 public:
1181 // Accessors
1182 static DependencyContext vmdependencies(oop context);
1183
1184 // Testers
1185 static bool is_subclass(Klass* klass) {
1186 return klass->is_subclass_of(SystemDictionary::Context_klass());
1187 }
1188 static bool is_instance(oop obj);
1189 };
1190
1191 // Interface to java.security.AccessControlContext objects
1192
1193 class java_security_AccessControlContext: AllStatic {
1194 private:
1195 // Note that for this class the layout changed between JDK1.2 and JDK1.3,
1196 // so we compute the offsets at startup rather than hard-wiring them.
1197 static int _context_offset;
1198 static int _privilegedContext_offset;
1199 static int _isPrivileged_offset;
1200 static int _isAuthorized_offset;
1201
1202 static void compute_offsets();
1203 public:
1204 static oop create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS);
1205
1206 static bool is_authorized(Handle context);
1207
1208 // Debugging/initialization
1209 friend class JavaClasses;
1210 };
1211
1212
1213 // Interface to java.lang.ClassLoader objects
1214
1215 #define CLASSLOADER_INJECTED_FIELDS(macro) \
1216 macro(java_lang_ClassLoader, loader_data, intptr_signature, false)
1217
1218 class java_lang_ClassLoader : AllStatic {
1219 private:
1220 // The fake offsets are added by the class loader when java.lang.Class is loaded
1221 enum {
1222 hc_parent_offset = 0
1223 };
1224 static int _loader_data_offset;
1225 static bool offsets_computed;
1226 static int parent_offset;
1227 static int parallelCapable_offset;
1228 static int unnamedModule_offset;
1229
1230 public:
1231 static void compute_offsets();
1232
1233 static ClassLoaderData** loader_data_addr(oop loader);
1234 static ClassLoaderData* loader_data(oop loader);
1235
1236 static oop parent(oop loader);
1237 static bool isAncestor(oop loader, oop cl);
1238
1239 // Support for parallelCapable field
1240 static bool parallelCapable(oop the_class_mirror);
1241
1242 static bool is_trusted_loader(oop loader);
1243
1244 // Fix for 4474172
1245 static oop non_reflection_class_loader(oop loader);
1246
1247 // Testers
1248 static bool is_subclass(Klass* klass) {
1249 return klass->is_subclass_of(SystemDictionary::ClassLoader_klass());
1250 }
1251 static bool is_instance(oop obj);
1252
1253 static oop unnamedModule(oop loader);
1254
1255 // Debugging
1256 friend class JavaClasses;
1257 friend class ClassFileParser; // access to number_of_fake_fields
1258 };
1259
1260
1261 // Interface to java.lang.System objects
1262
1263 class java_lang_System : AllStatic {
1264 private:
1265 enum {
1266 hc_static_in_offset = 0,
1267 hc_static_out_offset = 1,
1268 hc_static_err_offset = 2,
1269 hc_static_security_offset = 3
1270 };
1271
1272 static int static_in_offset;
1273 static int static_out_offset;
1274 static int static_err_offset;
1275 static int static_security_offset;
1276
1277 public:
1278 static int in_offset_in_bytes();
1279 static int out_offset_in_bytes();
1280 static int err_offset_in_bytes();
1281
1282 static bool has_security_manager();
1283
1284 // Debugging
1285 friend class JavaClasses;
1286 };
1287
1288
1289 // Interface to java.lang.StackTraceElement objects
1290
1291 class java_lang_StackTraceElement: AllStatic {
1292 private:
1293 enum {
1294 hc_moduleName_offset = 0,
1295 hc_moduleVersion_offset = 1,
1296 hc_declaringClass_offset = 2,
1297 hc_methodName_offset = 3,
1298 hc_fileName_offset = 4,
1299 hc_lineNumber_offset = 5
1300 };
1301
1302 static int moduleName_offset;
1303 static int moduleVersion_offset;
1304 static int declaringClass_offset;
1305 static int methodName_offset;
1306 static int fileName_offset;
1307 static int lineNumber_offset;
1308
1309 // Setters
1310 static void set_moduleName(oop element, oop value);
1311 static void set_moduleVersion(oop element, oop value);
1312 static void set_declaringClass(oop element, oop value);
1313 static void set_methodName(oop element, oop value);
1314 static void set_fileName(oop element, oop value);
1315 static void set_lineNumber(oop element, int value);
1316
1317 public:
1318 // Create an instance of StackTraceElement
1319 static oop create(const methodHandle& method, int bci, TRAPS);
1320
1321 static void fill_in(Handle element, InstanceKlass* holder, const methodHandle& method,
1322 int version, int bci, int cpref, TRAPS);
1323
1324 // Debugging
1325 friend class JavaClasses;
1326 };
1327
1328
1329 class Backtrace: AllStatic {
1330 public:
1331 // Helper backtrace functions to store bci|version together.
1332 static int merge_bci_and_version(int bci, int version);
1333 static int merge_mid_and_cpref(int mid, int cpref);
1334 static int bci_at(unsigned int merged);
1335 static int version_at(unsigned int merged);
1336 static int mid_at(unsigned int merged);
1337 static int cpref_at(unsigned int merged);
1338 static int get_line_number(const methodHandle& method, int bci);
1339 static Symbol* get_source_file_name(InstanceKlass* holder, int version);
1340
1341 // Debugging
1342 friend class JavaClasses;
1343 };
1344
1345 // Interface to java.lang.StackFrameInfo objects
1346
1347 #define STACKFRAMEINFO_INJECTED_FIELDS(macro) \
1348 macro(java_lang_StackFrameInfo, version, short_signature, false)
1349
1350 class java_lang_StackFrameInfo: AllStatic {
1351 private:
1352 static int _declaringClass_offset;
1353 static int _memberName_offset;
1354 static int _bci_offset;
1355 static int _version_offset;
1356
1357 static Method* get_method(Handle stackFrame, InstanceKlass* holder, TRAPS);
1358
1359 public:
1360 // Setters
1361 static void set_declaringClass(oop info, oop value);
1362 static void set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci);
1363 static void set_bci(oop info, int value);
1364
1365 static void set_version(oop info, short value);
1366
1367 static void compute_offsets();
1368
1369 static void to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS);
1370
1371 // Debugging
1372 friend class JavaClasses;
1373 };
1374
1375 class java_lang_LiveStackFrameInfo: AllStatic {
1376 private:
1377 static int _monitors_offset;
1378 static int _locals_offset;
1379 static int _operands_offset;
1380
1381 public:
1382 static void set_monitors(oop info, oop value);
1383 static void set_locals(oop info, oop value);
1384 static void set_operands(oop info, oop value);
1385
1386 static void compute_offsets();
1387
1388 // Debugging
1389 friend class JavaClasses;
1390 };
1391
1392 // Interface to java.lang.AssertionStatusDirectives objects
1393
1394 class java_lang_AssertionStatusDirectives: AllStatic {
1395 private:
1396 enum {
1397 hc_classes_offset,
1398 hc_classEnabled_offset,
1399 hc_packages_offset,
1400 hc_packageEnabled_offset,
1401 hc_deflt_offset
1402 };
1403
1404 static int classes_offset;
1405 static int classEnabled_offset;
1406 static int packages_offset;
1407 static int packageEnabled_offset;
1408 static int deflt_offset;
1409
1410 public:
1411 // Setters
1412 static void set_classes(oop obj, oop val);
1413 static void set_classEnabled(oop obj, oop val);
1414 static void set_packages(oop obj, oop val);
1415 static void set_packageEnabled(oop obj, oop val);
1416 static void set_deflt(oop obj, bool val);
1417 // Debugging
1418 friend class JavaClasses;
1419 };
1420
1421
1422 class java_nio_Buffer: AllStatic {
1423 private:
1424 static int _limit_offset;
1425
1426 public:
1427 static int limit_offset();
1428 static void compute_offsets();
1429 };
1430
1431 class java_util_concurrent_locks_AbstractOwnableSynchronizer : AllStatic {
1432 private:
1433 static int _owner_offset;
1434 public:
1435 static void initialize(TRAPS);
1436 static oop get_owner_threadObj(oop obj);
1437 };
1438
1439 // Use to declare fields that need to be injected into Java classes
1440 // for the JVM to use. The name_index and signature_index are
1441 // declared in vmSymbols. The may_be_java flag is used to declare
1442 // fields that might already exist in Java but should be injected if
1443 // they don't. Otherwise the field is unconditionally injected and
1444 // the JVM uses the injected one. This is to ensure that name
1445 // collisions don't occur. In general may_be_java should be false
1446 // unless there's a good reason.
1447
1448 class InjectedField {
1449 public:
1450 const SystemDictionary::WKID klass_id;
1451 const vmSymbols::SID name_index;
1452 const vmSymbols::SID signature_index;
1453 const bool may_be_java;
1454
1455
1456 Klass* klass() const { return SystemDictionary::well_known_klass(klass_id); }
1457 Symbol* name() const { return lookup_symbol(name_index); }
1458 Symbol* signature() const { return lookup_symbol(signature_index); }
1459
1460 int compute_offset();
1461
1462 // Find the Symbol for this index
1463 static Symbol* lookup_symbol(int symbol_index) {
1464 return vmSymbols::symbol_at((vmSymbols::SID)symbol_index);
1465 }
1466 };
1467
1468 #define DECLARE_INJECTED_FIELD_ENUM(klass, name, signature, may_be_java) \
1469 klass##_##name##_enum,
1470
1471 #define ALL_INJECTED_FIELDS(macro) \
1472 CLASS_INJECTED_FIELDS(macro) \
1473 CLASSLOADER_INJECTED_FIELDS(macro) \
1474 MEMBERNAME_INJECTED_FIELDS(macro) \
1475 CALLSITECONTEXT_INJECTED_FIELDS(macro) \
1476 STACKFRAMEINFO_INJECTED_FIELDS(macro) \
1477 MODULE_INJECTED_FIELDS(macro)
1478
1479 // Interface to hard-coded offset checking
1480
1481 class JavaClasses : AllStatic {
1482 private:
1483
1484 static InjectedField _injected_fields[];
1485
1486 static bool check_offset(const char *klass_name, int offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1487 static bool check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1488 static bool check_constant(const char *klass_name, int constant, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1489
1490 public:
1491 enum InjectedFieldID {
1492 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD_ENUM)
1493 MAX_enum
1494 };
1495
1496 static int compute_injected_offset(InjectedFieldID id);
1497
1498 static void compute_hard_coded_offsets();
1499 static void compute_offsets();
1500 static void check_offsets() PRODUCT_RETURN;
1501
1502 static InjectedField* get_injected(Symbol* class_name, int* field_count);
1503 };
1504
1505 #undef DECLARE_INJECTED_FIELD_ENUM
1506
1507 #endif // SHARE_VM_CLASSFILE_JAVACLASSES_HPP