1 /*
2 * Copyright (c) 1997, 2017, 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 void set_compact_strings(bool value);
85
86 static int value_offset_in_bytes() {
87 assert(initialized && (value_offset > 0), "Must be initialized");
88 return value_offset;
89 }
90 static int hash_offset_in_bytes() {
91 assert(initialized && (hash_offset > 0), "Must be initialized");
92 return hash_offset;
93 }
94 static int coder_offset_in_bytes() {
95 assert(initialized && (coder_offset > 0), "Must be initialized");
96 return coder_offset;
97 }
98
99 static inline void set_value_raw(oop string, typeArrayOop buffer);
100 static inline void set_value(oop string, typeArrayOop buffer);
101 static inline void set_hash(oop string, unsigned int hash);
102
103 // Accessors
104 static inline typeArrayOop value(oop java_string);
105 static inline unsigned int hash(oop java_string);
106 static inline bool is_latin1(oop java_string);
107 static inline int length(oop java_string);
108 static int utf8_length(oop java_string);
109
110 // String converters
111 static char* as_utf8_string(oop java_string);
112 static char* as_utf8_string(oop java_string, char* buf, int buflen);
113 static char* as_utf8_string(oop java_string, int start, int len);
114 static char* as_utf8_string(oop java_string, int start, int len, char* buf, int buflen);
115 static char* as_platform_dependent_str(Handle java_string, TRAPS);
116 static jchar* as_unicode_string(oop java_string, int& length, TRAPS);
117 // produce an ascii string with all other values quoted using \u####
118 static char* as_quoted_ascii(oop java_string);
119
120 // Compute the hash value for a java.lang.String object which would
121 // contain the characters passed in.
122 //
123 // As the hash value used by the String object itself, in
124 // String.hashCode(). This value is normally calculated in Java code
125 // in the String.hashCode method(), but is precomputed for String
126 // objects in the shared archive file.
127 // hash P(31) from Kernighan & Ritchie
128 //
129 // For this reason, THIS ALGORITHM MUST MATCH String.hashCode().
130 static unsigned int hash_code(const jchar* s, int len) {
131 unsigned int h = 0;
132 while (len-- > 0) {
133 h = 31*h + (unsigned int) *s;
134 s++;
135 }
136 return h;
137 }
138
139 static unsigned int hash_code(const jbyte* s, int len) {
140 unsigned int h = 0;
141 while (len-- > 0) {
142 h = 31*h + (((unsigned int) *s) & 0xFF);
143 s++;
144 }
145 return h;
146 }
147
148 static unsigned int hash_code(oop java_string);
149
150 static bool equals(oop java_string, jchar* chars, int len);
151 static bool equals(oop str1, oop str2);
152
153 // Conversion between '.' and '/' formats
154 static Handle externalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '/', '.', THREAD); }
155 static Handle internalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '.', '/', THREAD); }
156
157 // Conversion
158 static Symbol* as_symbol(oop java_string, TRAPS);
159 static Symbol* as_symbol_or_null(oop java_string);
160
161 // Testers
162 static bool is_instance(oop obj);
163 static inline bool is_instance_inlined(oop obj);
164
165 // Debugging
166 static void print(oop java_string, outputStream* st);
167 friend class JavaClasses;
168 friend class StringTable;
169 };
170
171
172 // Interface to java.lang.Class objects
173
174 #define CLASS_INJECTED_FIELDS(macro) \
175 macro(java_lang_Class, klass, intptr_signature, false) \
176 macro(java_lang_Class, array_klass, intptr_signature, false) \
177 macro(java_lang_Class, oop_size, int_signature, false) \
178 macro(java_lang_Class, static_oop_field_count, int_signature, false) \
179 macro(java_lang_Class, protection_domain, object_signature, false) \
180 macro(java_lang_Class, signers, object_signature, false)
181
182 class java_lang_Class : AllStatic {
183 friend class VMStructs;
184 friend class JVMCIVMStructs;
185
186 private:
187 // The fake offsets are added by the class loader when java.lang.Class is loaded
188
189 static int _klass_offset;
190 static int _array_klass_offset;
191
192 static int _oop_size_offset;
193 static int _static_oop_field_count_offset;
194
195 static int _protection_domain_offset;
196 static int _init_lock_offset;
197 static int _signers_offset;
198 static int _class_loader_offset;
199 static int _module_offset;
200 static int _component_mirror_offset;
201
202 static bool offsets_computed;
203 static int classRedefinedCount_offset;
204
205 static GrowableArray<Klass*>* _fixup_mirror_list;
206 static GrowableArray<Klass*>* _fixup_module_field_list;
207
208 static void set_init_lock(oop java_class, oop init_lock);
209 static void set_protection_domain(oop java_class, oop protection_domain);
210 static void set_class_loader(oop java_class, oop class_loader);
211 static void set_component_mirror(oop java_class, oop comp_mirror);
212 static void initialize_mirror_fields(Klass* k, Handle mirror, Handle protection_domain, TRAPS);
213 static void set_mirror_module_field(Klass* K, Handle mirror, Handle module, TRAPS);
214 public:
215 static void allocate_fixup_lists();
216 static void compute_offsets();
217
218 // Instance creation
219 static void create_mirror(Klass* k, Handle class_loader, Handle module,
220 Handle protection_domain, TRAPS);
221 static void fixup_mirror(Klass* k, TRAPS);
222 static oop create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS);
223
224 static void fixup_module_field(Klass* k, Handle module);
225
226 // Conversion
227 static Klass* as_Klass(oop java_class);
228 static void set_klass(oop java_class, Klass* klass);
229 static BasicType as_BasicType(oop java_class, Klass** reference_klass = NULL);
230 static Symbol* as_signature(oop java_class, bool intern_if_not_found, TRAPS);
231 static void print_signature(oop java_class, outputStream *st);
232 static const char* as_external_name(oop java_class);
233 // Testing
234 static bool is_instance(oop obj);
235
236 static bool is_primitive(oop java_class);
237 static BasicType primitive_type(oop java_class);
238 static oop primitive_mirror(BasicType t);
239 // JVM_NewArray support
240 static Klass* array_klass_acquire(oop java_class);
241 static void release_set_array_klass(oop java_class, Klass* klass);
242 // compiler support for class operations
243 static int klass_offset_in_bytes() { return _klass_offset; }
244 static int array_klass_offset_in_bytes() { return _array_klass_offset; }
245 // Support for classRedefinedCount field
246 static int classRedefinedCount(oop the_class_mirror);
247 static void set_classRedefinedCount(oop the_class_mirror, int value);
248
249 // Support for embedded per-class oops
250 static oop protection_domain(oop java_class);
251 static oop init_lock(oop java_class);
252 static oop component_mirror(oop java_class);
253 static objArrayOop signers(oop java_class);
254 static void set_signers(oop java_class, objArrayOop signers);
255
256 static oop class_loader(oop java_class);
257 static void set_module(oop java_class, oop module);
258 static oop module(oop java_class);
259
260 static int oop_size(oop java_class);
261 static void set_oop_size(oop java_class, int size);
262 static int static_oop_field_count(oop java_class);
263 static void set_static_oop_field_count(oop java_class, int size);
264
265 static GrowableArray<Klass*>* fixup_mirror_list() {
266 return _fixup_mirror_list;
267 }
268 static void set_fixup_mirror_list(GrowableArray<Klass*>* v) {
269 _fixup_mirror_list = v;
270 }
271
272 static GrowableArray<Klass*>* fixup_module_field_list() {
273 return _fixup_module_field_list;
274 }
275 static void set_fixup_module_field_list(GrowableArray<Klass*>* v) {
276 _fixup_module_field_list = v;
277 }
278
279 // Debugging
280 friend class JavaClasses;
281 friend class InstanceKlass; // verification code accesses offsets
282 friend class ClassFileParser; // access to number_of_fake_fields
283 };
284
285 // Interface to java.lang.Thread objects
286
287 class java_lang_Thread : AllStatic {
288 private:
289 // Note that for this class the layout changed between JDK1.2 and JDK1.3,
290 // so we compute the offsets at startup rather than hard-wiring them.
291 static int _name_offset;
292 static int _group_offset;
293 static int _contextClassLoader_offset;
294 static int _inheritedAccessControlContext_offset;
295 static int _priority_offset;
296 static int _eetop_offset;
297 static int _daemon_offset;
298 static int _stillborn_offset;
299 static int _stackSize_offset;
300 static int _tid_offset;
301 static int _thread_status_offset;
302 static int _park_blocker_offset;
303 static int _park_event_offset ;
304
305 static void compute_offsets();
306
307 public:
308 // Instance creation
309 static oop create();
310 // Returns the JavaThread associated with the thread obj
311 static JavaThread* thread(oop java_thread);
312 // Set JavaThread for instance
313 static void set_thread(oop java_thread, JavaThread* thread);
314 // Name
315 static oop name(oop java_thread);
316 static void set_name(oop java_thread, oop name);
317 // Priority
318 static ThreadPriority priority(oop java_thread);
319 static void set_priority(oop java_thread, ThreadPriority priority);
320 // Thread group
321 static oop threadGroup(oop java_thread);
322 // Stillborn
323 static bool is_stillborn(oop java_thread);
324 static void set_stillborn(oop java_thread);
325 // Alive (NOTE: this is not really a field, but provides the correct
326 // definition without doing a Java call)
327 static bool is_alive(oop java_thread);
328 // Daemon
329 static bool is_daemon(oop java_thread);
330 static void set_daemon(oop java_thread);
331 // Context ClassLoader
332 static oop context_class_loader(oop java_thread);
333 // Control context
334 static oop inherited_access_control_context(oop java_thread);
335 // Stack size hint
336 static jlong stackSize(oop java_thread);
337 // Thread ID
338 static jlong thread_id(oop java_thread);
339
340 // Blocker object responsible for thread parking
341 static oop park_blocker(oop java_thread);
342
343 // Pointer to type-stable park handler, encoded as jlong.
344 // Should be set when apparently null
345 // For details, see unsafe.cpp Unsafe_Unpark
346 static jlong park_event(oop java_thread);
347 static bool set_park_event(oop java_thread, jlong ptr);
348
349 // Java Thread Status for JVMTI and M&M use.
350 // This thread status info is saved in threadStatus field of
351 // java.lang.Thread java class.
352 enum ThreadStatus {
353 NEW = 0,
354 RUNNABLE = JVMTI_THREAD_STATE_ALIVE + // runnable / running
355 JVMTI_THREAD_STATE_RUNNABLE,
356 SLEEPING = JVMTI_THREAD_STATE_ALIVE + // Thread.sleep()
357 JVMTI_THREAD_STATE_WAITING +
358 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
359 JVMTI_THREAD_STATE_SLEEPING,
360 IN_OBJECT_WAIT = JVMTI_THREAD_STATE_ALIVE + // Object.wait()
361 JVMTI_THREAD_STATE_WAITING +
362 JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
363 JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
364 IN_OBJECT_WAIT_TIMED = JVMTI_THREAD_STATE_ALIVE + // Object.wait(long)
365 JVMTI_THREAD_STATE_WAITING +
366 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
367 JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
368 PARKED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park()
369 JVMTI_THREAD_STATE_WAITING +
370 JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
371 JVMTI_THREAD_STATE_PARKED,
372 PARKED_TIMED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park(long)
373 JVMTI_THREAD_STATE_WAITING +
374 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
375 JVMTI_THREAD_STATE_PARKED,
376 BLOCKED_ON_MONITOR_ENTER = JVMTI_THREAD_STATE_ALIVE + // (re-)entering a synchronization block
377 JVMTI_THREAD_STATE_BLOCKED_ON_MONITOR_ENTER,
378 TERMINATED = JVMTI_THREAD_STATE_TERMINATED
379 };
380 // Write thread status info to threadStatus field of java.lang.Thread.
381 static void set_thread_status(oop java_thread_oop, ThreadStatus status);
382 // Read thread status info from threadStatus field of java.lang.Thread.
383 static ThreadStatus get_thread_status(oop java_thread_oop);
384
385 static const char* thread_status_name(oop java_thread_oop);
386
387 // Debugging
388 friend class JavaClasses;
389 };
390
391 // Interface to java.lang.ThreadGroup objects
392
393 class java_lang_ThreadGroup : AllStatic {
394 private:
395 static int _parent_offset;
396 static int _name_offset;
397 static int _threads_offset;
398 static int _groups_offset;
399 static int _maxPriority_offset;
400 static int _destroyed_offset;
401 static int _daemon_offset;
402 static int _nthreads_offset;
403 static int _ngroups_offset;
404
405 static void compute_offsets();
406
407 public:
408 // parent ThreadGroup
409 static oop parent(oop java_thread_group);
410 // name
411 static const char* name(oop java_thread_group);
412 // ("name as oop" accessor is not necessary)
413 // Number of threads in group
414 static int nthreads(oop java_thread_group);
415 // threads
416 static objArrayOop threads(oop java_thread_group);
417 // Number of threads in group
418 static int ngroups(oop java_thread_group);
419 // groups
420 static objArrayOop groups(oop java_thread_group);
421 // maxPriority in group
422 static ThreadPriority maxPriority(oop java_thread_group);
423 // Destroyed
424 static bool is_destroyed(oop java_thread_group);
425 // Daemon
426 static bool is_daemon(oop java_thread_group);
427 // Debugging
428 friend class JavaClasses;
429 };
430
431
432
433 // Interface to java.lang.Throwable objects
434
435 class java_lang_Throwable: AllStatic {
436 friend class BacktraceBuilder;
437 friend class BacktraceIterator;
438
439 private:
440 // Offsets
441 enum {
442 hc_backtrace_offset = 0,
443 hc_detailMessage_offset = 1,
444 hc_cause_offset = 2, // New since 1.4
445 hc_stackTrace_offset = 3 // New since 1.4
446 };
447 enum {
448 hc_static_unassigned_stacktrace_offset = 0 // New since 1.7
449 };
450 // Trace constants
451 enum {
452 trace_methods_offset = 0,
453 trace_bcis_offset = 1,
454 trace_mirrors_offset = 2,
455 trace_names_offset = 3,
456 trace_next_offset = 4,
457 trace_size = 5,
458 trace_chunk_size = 32
459 };
460
461 static int backtrace_offset;
462 static int detailMessage_offset;
463 static int stackTrace_offset;
464 static int depth_offset;
465 static int static_unassigned_stacktrace_offset;
466
467 // StackTrace (programmatic access, new since 1.4)
468 static void clear_stacktrace(oop throwable);
469 // Stacktrace (post JDK 1.7.0 to allow immutability protocol to be followed)
470 static void set_stacktrace(oop throwable, oop st_element_array);
471 static oop unassigned_stacktrace();
472
473 public:
474 // Backtrace
475 static oop backtrace(oop throwable);
476 static void set_backtrace(oop throwable, oop value);
477 static int depth(oop throwable);
478 static void set_depth(oop throwable, int value);
479 // Needed by JVMTI to filter out this internal field.
480 static int get_backtrace_offset() { return backtrace_offset;}
481 static int get_detailMessage_offset() { return detailMessage_offset;}
482 // Message
483 static oop message(oop throwable);
484 static void set_message(oop throwable, oop value);
485 static Symbol* detail_message(oop throwable);
486 static void print_stack_element(outputStream *st, const methodHandle& method, int bci);
487 static void print_stack_usage(Handle stream);
488
489 static void compute_offsets();
490
491 // Allocate space for backtrace (created but stack trace not filled in)
492 static void allocate_backtrace(Handle throwable, TRAPS);
493 // Fill in current stack trace for throwable with preallocated backtrace (no GC)
494 static void fill_in_stack_trace_of_preallocated_backtrace(Handle throwable);
495 // Fill in current stack trace, can cause GC
496 static void fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS);
497 static void fill_in_stack_trace(Handle throwable, const methodHandle& method = methodHandle());
498 // Programmatic access to stack trace
499 static void get_stack_trace_elements(Handle throwable, objArrayHandle stack_trace, TRAPS);
500 // Printing
501 static void print(oop throwable, outputStream* st);
502 static void print_stack_trace(Handle throwable, outputStream* st);
503 static void java_printStackTrace(Handle throwable, TRAPS);
504 // Debugging
505 friend class JavaClasses;
506 };
507
508
509 // Interface to java.lang.reflect.AccessibleObject objects
510
511 class java_lang_reflect_AccessibleObject: AllStatic {
512 private:
513 // Note that to reduce dependencies on the JDK we compute these
514 // offsets at run-time.
515 static int override_offset;
516
517 static void compute_offsets();
518
519 public:
520 // Accessors
521 static jboolean override(oop reflect);
522 static void set_override(oop reflect, jboolean value);
523
524 // Debugging
525 friend class JavaClasses;
526 };
527
528
529 // Interface to java.lang.reflect.Method objects
530
531 class java_lang_reflect_Method : public java_lang_reflect_AccessibleObject {
532 private:
533 // Note that to reduce dependencies on the JDK we compute these
534 // offsets at run-time.
535 static int clazz_offset;
536 static int name_offset;
537 static int returnType_offset;
538 static int parameterTypes_offset;
539 static int exceptionTypes_offset;
540 static int slot_offset;
541 static int modifiers_offset;
542 static int signature_offset;
543 static int annotations_offset;
544 static int parameter_annotations_offset;
545 static int annotation_default_offset;
546 static int type_annotations_offset;
547
548 static void compute_offsets();
549
550 public:
551 // Allocation
552 static Handle create(TRAPS);
553
554 // Accessors
555 static oop clazz(oop reflect);
556 static void set_clazz(oop reflect, oop value);
557
558 static oop name(oop method);
559 static void set_name(oop method, oop value);
560
561 static oop return_type(oop method);
562 static void set_return_type(oop method, oop value);
563
564 static oop parameter_types(oop method);
565 static void set_parameter_types(oop method, oop value);
566
567 static oop exception_types(oop method);
568 static void set_exception_types(oop method, oop value);
569
570 static int slot(oop reflect);
571 static void set_slot(oop reflect, int value);
572
573 static int modifiers(oop method);
574 static void set_modifiers(oop method, int value);
575
576 static bool has_signature_field();
577 static oop signature(oop method);
578 static void set_signature(oop method, oop value);
579
580 static bool has_annotations_field();
581 static oop annotations(oop method);
582 static void set_annotations(oop method, oop value);
583
584 static bool has_parameter_annotations_field();
585 static oop parameter_annotations(oop method);
586 static void set_parameter_annotations(oop method, oop value);
587
588 static bool has_annotation_default_field();
589 static oop annotation_default(oop method);
590 static void set_annotation_default(oop method, oop value);
591
592 static bool has_type_annotations_field();
593 static oop type_annotations(oop method);
594 static void set_type_annotations(oop method, oop value);
595
596 // Debugging
597 friend class JavaClasses;
598 };
599
600
601 // Interface to java.lang.reflect.Constructor objects
602
603 class java_lang_reflect_Constructor : public java_lang_reflect_AccessibleObject {
604 private:
605 // Note that to reduce dependencies on the JDK we compute these
606 // offsets at run-time.
607 static int clazz_offset;
608 static int parameterTypes_offset;
609 static int exceptionTypes_offset;
610 static int slot_offset;
611 static int modifiers_offset;
612 static int signature_offset;
613 static int annotations_offset;
614 static int parameter_annotations_offset;
615 static int type_annotations_offset;
616
617 static void compute_offsets();
618
619 public:
620 // Allocation
621 static Handle create(TRAPS);
622
623 // Accessors
624 static oop clazz(oop reflect);
625 static void set_clazz(oop reflect, oop value);
626
627 static oop parameter_types(oop constructor);
628 static void set_parameter_types(oop constructor, oop value);
629
630 static oop exception_types(oop constructor);
631 static void set_exception_types(oop constructor, oop value);
632
633 static int slot(oop reflect);
634 static void set_slot(oop reflect, int value);
635
636 static int modifiers(oop constructor);
637 static void set_modifiers(oop constructor, int value);
638
639 static bool has_signature_field();
640 static oop signature(oop constructor);
641 static void set_signature(oop constructor, oop value);
642
643 static bool has_annotations_field();
644 static oop annotations(oop constructor);
645 static void set_annotations(oop constructor, oop value);
646
647 static bool has_parameter_annotations_field();
648 static oop parameter_annotations(oop method);
649 static void set_parameter_annotations(oop method, oop value);
650
651 static bool has_type_annotations_field();
652 static oop type_annotations(oop constructor);
653 static void set_type_annotations(oop constructor, oop value);
654
655 // Debugging
656 friend class JavaClasses;
657 };
658
659
660 // Interface to java.lang.reflect.Field objects
661
662 class java_lang_reflect_Field : public java_lang_reflect_AccessibleObject {
663 private:
664 // Note that to reduce dependencies on the JDK we compute these
665 // offsets at run-time.
666 static int clazz_offset;
667 static int name_offset;
668 static int type_offset;
669 static int slot_offset;
670 static int modifiers_offset;
671 static int signature_offset;
672 static int annotations_offset;
673 static int type_annotations_offset;
674
675 static void compute_offsets();
676
677 public:
678 // Allocation
679 static Handle create(TRAPS);
680
681 // Accessors
682 static oop clazz(oop reflect);
683 static void set_clazz(oop reflect, oop value);
684
685 static oop name(oop field);
686 static void set_name(oop field, oop value);
687
688 static oop type(oop field);
689 static void set_type(oop field, oop value);
690
691 static int slot(oop reflect);
692 static void set_slot(oop reflect, int value);
693
694 static int modifiers(oop field);
695 static void set_modifiers(oop field, int value);
696
697 static bool has_signature_field();
698 static oop signature(oop constructor);
699 static void set_signature(oop constructor, oop value);
700
701 static bool has_annotations_field();
702 static oop annotations(oop constructor);
703 static void set_annotations(oop constructor, oop value);
704
705 static bool has_parameter_annotations_field();
706 static oop parameter_annotations(oop method);
707 static void set_parameter_annotations(oop method, oop value);
708
709 static bool has_annotation_default_field();
710 static oop annotation_default(oop method);
711 static void set_annotation_default(oop method, oop value);
712
713 static bool has_type_annotations_field();
714 static oop type_annotations(oop field);
715 static void set_type_annotations(oop field, oop value);
716
717 // Debugging
718 friend class JavaClasses;
719 };
720
721 class java_lang_reflect_Parameter {
722 private:
723 // Note that to reduce dependencies on the JDK we compute these
724 // offsets at run-time.
725 static int name_offset;
726 static int modifiers_offset;
727 static int index_offset;
728 static int executable_offset;
729
730 static void compute_offsets();
731
732 public:
733 // Allocation
734 static Handle create(TRAPS);
735
736 // Accessors
737 static oop name(oop field);
738 static void set_name(oop field, oop value);
739
740 static int index(oop reflect);
741 static void set_index(oop reflect, int value);
742
743 static int modifiers(oop reflect);
744 static void set_modifiers(oop reflect, int value);
745
746 static oop executable(oop constructor);
747 static void set_executable(oop constructor, oop value);
748
749 friend class JavaClasses;
750 };
751
752 #define MODULE_INJECTED_FIELDS(macro) \
753 macro(java_lang_Module, module_entry, intptr_signature, false)
754
755 class java_lang_Module {
756 private:
757 static int loader_offset;
758 static int name_offset;
759 static int _module_entry_offset;
760 static void compute_offsets();
761
762 public:
763 // Allocation
764 static Handle create(Handle loader, Handle module_name, TRAPS);
765
766 // Testers
767 static bool is_instance(oop obj);
768
769 // Accessors
770 static oop loader(oop module);
771 static void set_loader(oop module, oop value);
772
773 static oop name(oop module);
774 static void set_name(oop module, oop value);
775
776 static ModuleEntry* module_entry(oop module, TRAPS);
777 static void set_module_entry(oop module, ModuleEntry* module_entry);
778
779 friend class JavaClasses;
780 };
781
782 // Interface to jdk.internal.reflect.ConstantPool objects
783 class reflect_ConstantPool {
784 private:
785 // Note that to reduce dependencies on the JDK we compute these
786 // offsets at run-time.
787 static int _oop_offset;
788
789 static void compute_offsets();
790
791 public:
792 // Allocation
793 static Handle create(TRAPS);
794
795 // Accessors
796 static void set_cp(oop reflect, ConstantPool* value);
797 static int oop_offset() {
798 return _oop_offset;
799 }
800
801 static ConstantPool* get_cp(oop reflect);
802
803 // Debugging
804 friend class JavaClasses;
805 };
806
807 // Interface to jdk.internal.reflect.UnsafeStaticFieldAccessorImpl objects
808 class reflect_UnsafeStaticFieldAccessorImpl {
809 private:
810 static int _base_offset;
811 static void compute_offsets();
812
813 public:
814 static int base_offset() {
815 return _base_offset;
816 }
817
818 // Debugging
819 friend class JavaClasses;
820 };
821
822 // Interface to java.lang primitive type boxing objects:
823 // - java.lang.Boolean
824 // - java.lang.Character
825 // - java.lang.Float
826 // - java.lang.Double
827 // - java.lang.Byte
828 // - java.lang.Short
829 // - java.lang.Integer
830 // - java.lang.Long
831
832 // This could be separated out into 8 individual classes.
833
834 class java_lang_boxing_object: AllStatic {
835 private:
836 enum {
837 hc_value_offset = 0
838 };
839 static int value_offset;
840 static int long_value_offset;
841
842 static oop initialize_and_allocate(BasicType type, TRAPS);
843 public:
844 // Allocation. Returns a boxed value, or NULL for invalid type.
845 static oop create(BasicType type, jvalue* value, TRAPS);
846 // Accessors. Returns the basic type being boxed, or T_ILLEGAL for invalid oop.
847 static BasicType get_value(oop box, jvalue* value);
848 static BasicType set_value(oop box, jvalue* value);
849 static BasicType basic_type(oop box);
850 static bool is_instance(oop box) { return basic_type(box) != T_ILLEGAL; }
851 static bool is_instance(oop box, BasicType type) { return basic_type(box) == type; }
852 static void print(oop box, outputStream* st) { jvalue value; print(get_value(box, &value), &value, st); }
853 static void print(BasicType type, jvalue* value, outputStream* st);
854
855 static int value_offset_in_bytes(BasicType type) {
856 return ( type == T_LONG || type == T_DOUBLE ) ? long_value_offset :
857 value_offset;
858 }
859
860 // Debugging
861 friend class JavaClasses;
862 };
863
864
865
866 // Interface to java.lang.ref.Reference objects
867
868 class java_lang_ref_Reference: AllStatic {
869 public:
870 enum {
871 hc_referent_offset = 0,
872 hc_queue_offset = 1,
873 hc_next_offset = 2,
874 hc_discovered_offset = 3 // Is not last, see SoftRefs.
875 };
876
877 static int referent_offset;
878 static int queue_offset;
879 static int next_offset;
880 static int discovered_offset;
881 static int number_of_fake_oop_fields;
882
883 // Accessors
884 static inline oop referent(oop ref);
885 static inline void set_referent(oop ref, oop value);
886 static inline void set_referent_raw(oop ref, oop value);
887 static inline HeapWord* referent_addr(oop ref);
888 static inline oop next(oop ref);
889 static inline void set_next(oop ref, oop value);
890 static inline void set_next_raw(oop ref, oop value);
891 static inline HeapWord* next_addr(oop ref);
892 static inline oop discovered(oop ref);
893 static inline void set_discovered(oop ref, oop value);
894 static inline void set_discovered_raw(oop ref, oop value);
895 static inline HeapWord* discovered_addr(oop ref);
896 };
897
898
899 // Interface to java.lang.ref.SoftReference objects
900
901 class java_lang_ref_SoftReference: public java_lang_ref_Reference {
902 public:
903 enum {
904 // The timestamp is a long field and may need to be adjusted for alignment.
905 hc_timestamp_offset = hc_discovered_offset + 1
906 };
907 enum {
908 hc_static_clock_offset = 0
909 };
910
911 static int timestamp_offset;
912 static int static_clock_offset;
913
914 // Accessors
915 static jlong timestamp(oop ref);
916
917 // Accessors for statics
918 static jlong clock();
919 static void set_clock(jlong value);
920 };
921
922 // Interface to java.lang.invoke.MethodHandle objects
923
924 class MethodHandleEntry;
925
926 class java_lang_invoke_MethodHandle: AllStatic {
927 friend class JavaClasses;
928
929 private:
930 static int _type_offset; // the MethodType of this MH
931 static int _form_offset; // the LambdaForm of this MH
932
933 static void compute_offsets();
934
935 public:
936 // Accessors
937 static oop type(oop mh);
938 static void set_type(oop mh, oop mtype);
939
940 static oop form(oop mh);
941 static void set_form(oop mh, oop lform);
942
943 // Testers
944 static bool is_subclass(Klass* klass) {
945 return klass->is_subclass_of(SystemDictionary::MethodHandle_klass());
946 }
947 static bool is_instance(oop obj);
948
949 // Accessors for code generation:
950 static int type_offset_in_bytes() { return _type_offset; }
951 static int form_offset_in_bytes() { return _form_offset; }
952 };
953
954 // Interface to java.lang.invoke.DirectMethodHandle objects
955
956 class java_lang_invoke_DirectMethodHandle: AllStatic {
957 friend class JavaClasses;
958
959 private:
960 static int _member_offset; // the MemberName of this DMH
961
962 static void compute_offsets();
963
964 public:
965 // Accessors
966 static oop member(oop mh);
967
968 // Testers
969 static bool is_subclass(Klass* klass) {
970 return klass->is_subclass_of(SystemDictionary::DirectMethodHandle_klass());
971 }
972 static bool is_instance(oop obj);
973
974 // Accessors for code generation:
975 static int member_offset_in_bytes() { return _member_offset; }
976 };
977
978 // Interface to java.lang.invoke.LambdaForm objects
979 // (These are a private interface for managing adapter code generation.)
980
981 class java_lang_invoke_LambdaForm: AllStatic {
982 friend class JavaClasses;
983
984 private:
985 static int _vmentry_offset; // type is MemberName
986
987 static void compute_offsets();
988
989 public:
990 // Accessors
991 static oop vmentry(oop lform);
992 static void set_vmentry(oop lform, oop invoker);
993
994 // Testers
995 static bool is_subclass(Klass* klass) {
996 return SystemDictionary::LambdaForm_klass() != NULL &&
997 klass->is_subclass_of(SystemDictionary::LambdaForm_klass());
998 }
999 static bool is_instance(oop obj);
1000
1001 // Accessors for code generation:
1002 static int vmentry_offset_in_bytes() { return _vmentry_offset; }
1003 };
1004
1005
1006 // Interface to java.lang.invoke.MemberName objects
1007 // (These are a private interface for Java code to query the class hierarchy.)
1008
1009 #define RESOLVEDMETHOD_INJECTED_FIELDS(macro) \
1010 macro(java_lang_invoke_ResolvedMethodName, vmholder, object_signature, false) \
1011 macro(java_lang_invoke_ResolvedMethodName, vmtarget, intptr_signature, false)
1012
1013 class java_lang_invoke_ResolvedMethodName : AllStatic {
1014 friend class JavaClasses;
1015
1016 static int _vmtarget_offset;
1017 static int _vmholder_offset;
1018
1019 static void compute_offsets();
1020 public:
1021 static int vmtarget_offset_in_bytes() { return _vmtarget_offset; }
1022
1023 static Method* vmtarget(oop resolved_method);
1024 static void set_vmtarget(oop resolved_method, Method* method);
1025
1026 // find or create resolved member name
1027 static oop find_resolved_method(const methodHandle& m, TRAPS);
1028
1029 static bool is_instance(oop resolved_method);
1030 };
1031
1032
1033 #define MEMBERNAME_INJECTED_FIELDS(macro) \
1034 macro(java_lang_invoke_MemberName, vmindex, intptr_signature, false)
1035
1036
1037 class java_lang_invoke_MemberName: AllStatic {
1038 friend class JavaClasses;
1039
1040 private:
1041 // From java.lang.invoke.MemberName:
1042 // private Class<?> clazz; // class in which the method is defined
1043 // private String name; // may be null if not yet materialized
1044 // private Object type; // may be null if not yet materialized
1045 // private int flags; // modifier bits; see reflect.Modifier
1046 // private ResolvedMethodName method; // holds VM-specific target value
1047 // private intptr_t vmindex; // member index within class or interface
1048 static int _clazz_offset;
1049 static int _name_offset;
1050 static int _type_offset;
1051 static int _flags_offset;
1052 static int _method_offset;
1053 static int _vmindex_offset;
1054
1055 static void compute_offsets();
1056
1057 public:
1058 // Accessors
1059 static oop clazz(oop mname);
1060 static void set_clazz(oop mname, oop clazz);
1061
1062 static oop type(oop mname);
1063 static void set_type(oop mname, oop type);
1064
1065 static oop name(oop mname);
1066 static void set_name(oop mname, oop name);
1067
1068 static int flags(oop mname);
1069 static void set_flags(oop mname, int flags);
1070
1071 // Link through ResolvedMethodName field to get Method*
1072 static Method* vmtarget(oop mname);
1073 static void set_method(oop mname, oop method);
1074
1075 static intptr_t vmindex(oop mname);
1076 static void set_vmindex(oop mname, intptr_t index);
1077
1078 // Testers
1079 static bool is_subclass(Klass* klass) {
1080 return klass->is_subclass_of(SystemDictionary::MemberName_klass());
1081 }
1082 static bool is_instance(oop obj);
1083
1084 static bool is_method(oop obj);
1085
1086 // Relevant integer codes (keep these in synch. with MethodHandleNatives.Constants):
1087 enum {
1088 MN_IS_METHOD = 0x00010000, // method (not constructor)
1089 MN_IS_CONSTRUCTOR = 0x00020000, // constructor
1090 MN_IS_FIELD = 0x00040000, // field
1091 MN_IS_TYPE = 0x00080000, // nested type
1092 MN_CALLER_SENSITIVE = 0x00100000, // @CallerSensitive annotation detected
1093 MN_REFERENCE_KIND_SHIFT = 24, // refKind
1094 MN_REFERENCE_KIND_MASK = 0x0F000000 >> MN_REFERENCE_KIND_SHIFT,
1095 // The SEARCH_* bits are not for MN.flags but for the matchFlags argument of MHN.getMembers:
1096 MN_SEARCH_SUPERCLASSES = 0x00100000, // walk super classes
1097 MN_SEARCH_INTERFACES = 0x00200000 // walk implemented interfaces
1098 };
1099
1100 // Accessors for code generation:
1101 static int clazz_offset_in_bytes() { return _clazz_offset; }
1102 static int type_offset_in_bytes() { return _type_offset; }
1103 static int name_offset_in_bytes() { return _name_offset; }
1104 static int flags_offset_in_bytes() { return _flags_offset; }
1105 static int method_offset_in_bytes() { return _method_offset; }
1106 static int vmindex_offset_in_bytes() { return _vmindex_offset; }
1107 };
1108
1109
1110 // Interface to java.lang.invoke.MethodType objects
1111
1112 class java_lang_invoke_MethodType: AllStatic {
1113 friend class JavaClasses;
1114
1115 private:
1116 static int _rtype_offset;
1117 static int _ptypes_offset;
1118
1119 static void compute_offsets();
1120
1121 public:
1122 // Accessors
1123 static oop rtype(oop mt);
1124 static objArrayOop ptypes(oop mt);
1125
1126 static oop ptype(oop mt, int index);
1127 static int ptype_count(oop mt);
1128
1129 static int ptype_slot_count(oop mt); // extra counts for long/double
1130 static int rtype_slot_count(oop mt); // extra counts for long/double
1131
1132 static Symbol* as_signature(oop mt, bool intern_if_not_found, TRAPS);
1133 static void print_signature(oop mt, outputStream* st);
1134
1135 static bool is_instance(oop obj);
1136
1137 static bool equals(oop mt1, oop mt2);
1138
1139 // Accessors for code generation:
1140 static int rtype_offset_in_bytes() { return _rtype_offset; }
1141 static int ptypes_offset_in_bytes() { return _ptypes_offset; }
1142 };
1143
1144
1145 // Interface to java.lang.invoke.CallSite objects
1146
1147 class java_lang_invoke_CallSite: AllStatic {
1148 friend class JavaClasses;
1149
1150 private:
1151 static int _target_offset;
1152 static int _context_offset;
1153
1154 static void compute_offsets();
1155
1156 public:
1157 // Accessors
1158 static oop target( oop site);
1159 static void set_target( oop site, oop target);
1160 static void set_target_volatile( oop site, oop target);
1161
1162 static oop context(oop site);
1163
1164 // Testers
1165 static bool is_subclass(Klass* klass) {
1166 return klass->is_subclass_of(SystemDictionary::CallSite_klass());
1167 }
1168 static bool is_instance(oop obj);
1169
1170 // Accessors for code generation:
1171 static int target_offset_in_bytes() { return _target_offset; }
1172 };
1173
1174 // Interface to java.lang.invoke.MethodHandleNatives$CallSiteContext objects
1175
1176 #define CALLSITECONTEXT_INJECTED_FIELDS(macro) \
1177 macro(java_lang_invoke_MethodHandleNatives_CallSiteContext, vmdependencies, intptr_signature, false)
1178
1179 class DependencyContext;
1180
1181 class java_lang_invoke_MethodHandleNatives_CallSiteContext : AllStatic {
1182 friend class JavaClasses;
1183
1184 private:
1185 static int _vmdependencies_offset;
1186
1187 static void compute_offsets();
1188
1189 public:
1190 // Accessors
1191 static DependencyContext vmdependencies(oop context);
1192
1193 // Testers
1194 static bool is_subclass(Klass* klass) {
1195 return klass->is_subclass_of(SystemDictionary::Context_klass());
1196 }
1197 static bool is_instance(oop obj);
1198 };
1199
1200 // Interface to java.security.AccessControlContext objects
1201
1202 class java_security_AccessControlContext: AllStatic {
1203 private:
1204 // Note that for this class the layout changed between JDK1.2 and JDK1.3,
1205 // so we compute the offsets at startup rather than hard-wiring them.
1206 static int _context_offset;
1207 static int _privilegedContext_offset;
1208 static int _isPrivileged_offset;
1209 static int _isAuthorized_offset;
1210
1211 static void compute_offsets();
1212 public:
1213 static oop create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS);
1214
1215 static bool is_authorized(Handle context);
1216
1217 // Debugging/initialization
1218 friend class JavaClasses;
1219 };
1220
1221
1222 // Interface to java.lang.ClassLoader objects
1223
1224 #define CLASSLOADER_INJECTED_FIELDS(macro) \
1225 macro(java_lang_ClassLoader, loader_data, intptr_signature, false)
1226
1227 class java_lang_ClassLoader : AllStatic {
1228 private:
1229 // The fake offsets are added by the class loader when java.lang.Class is loaded
1230 enum {
1231 hc_parent_offset = 0
1232 };
1233 static int _loader_data_offset;
1234 static bool offsets_computed;
1235 static int parent_offset;
1236 static int parallelCapable_offset;
1237 static int name_offset;
1238 static int unnamedModule_offset;
1239
1240 public:
1241 static void compute_offsets();
1242
1243 static ClassLoaderData** loader_data_addr(oop loader);
1244 static ClassLoaderData* loader_data(oop loader);
1245
1246 static oop parent(oop loader);
1247 static oop name(oop loader);
1248 static bool isAncestor(oop loader, oop cl);
1249
1250 // Support for parallelCapable field
1251 static bool parallelCapable(oop the_class_mirror);
1252
1253 static bool is_trusted_loader(oop loader);
1254
1255 // Return true if this is one of the class loaders associated with
1256 // the generated bytecodes for reflection.
1257 static bool is_reflection_class_loader(oop loader);
1258
1259 // Fix for 4474172
1260 static oop non_reflection_class_loader(oop loader);
1261
1262 // Testers
1263 static bool is_subclass(Klass* klass) {
1264 return klass->is_subclass_of(SystemDictionary::ClassLoader_klass());
1265 }
1266 static bool is_instance(oop obj);
1267
1268 static oop unnamedModule(oop loader);
1269
1270 // Debugging
1271 friend class JavaClasses;
1272 friend class ClassFileParser; // access to number_of_fake_fields
1273 };
1274
1275
1276 // Interface to java.lang.System objects
1277
1278 class java_lang_System : AllStatic {
1279 private:
1280 enum {
1281 hc_static_in_offset = 0,
1282 hc_static_out_offset = 1,
1283 hc_static_err_offset = 2,
1284 hc_static_security_offset = 3
1285 };
1286
1287 static int static_in_offset;
1288 static int static_out_offset;
1289 static int static_err_offset;
1290 static int static_security_offset;
1291
1292 public:
1293 static int in_offset_in_bytes();
1294 static int out_offset_in_bytes();
1295 static int err_offset_in_bytes();
1296
1297 static bool has_security_manager();
1298
1299 // Debugging
1300 friend class JavaClasses;
1301 };
1302
1303
1304 // Interface to java.lang.StackTraceElement objects
1305
1306 class java_lang_StackTraceElement: AllStatic {
1307 private:
1308 enum {
1309 hc_declaringClassObject_offset = 0,
1310 hc_classLoaderName_offset = 1,
1311 hc_moduleName_offset = 2,
1312 hc_moduleVersion_offset = 3,
1313 hc_declaringClass_offset = 4,
1314 hc_methodName_offset = 5,
1315 hc_fileName_offset = 6,
1316 hc_lineNumber_offset = 7
1317 };
1318
1319 static int declaringClassObject_offset;
1320 static int classLoaderName_offset;
1321 static int moduleName_offset;
1322 static int moduleVersion_offset;
1323 static int declaringClass_offset;
1324 static int methodName_offset;
1325 static int fileName_offset;
1326 static int lineNumber_offset;
1327
1328 // Setters
1329 static void set_classLoaderName(oop element, oop value);
1330 static void set_moduleName(oop element, oop value);
1331 static void set_moduleVersion(oop element, oop value);
1332 static void set_declaringClass(oop element, oop value);
1333 static void set_methodName(oop element, oop value);
1334 static void set_fileName(oop element, oop value);
1335 static void set_lineNumber(oop element, int value);
1336 static void set_declaringClassObject(oop element, oop value);
1337
1338 public:
1339 // Create an instance of StackTraceElement
1340 static oop create(const methodHandle& method, int bci, TRAPS);
1341
1342 static void fill_in(Handle element, InstanceKlass* holder, const methodHandle& method,
1343 int version, int bci, Symbol* name, TRAPS);
1344
1345 // Debugging
1346 friend class JavaClasses;
1347 };
1348
1349
1350 class Backtrace: AllStatic {
1351 public:
1352 // Helper backtrace functions to store bci|version together.
1353 static int merge_bci_and_version(int bci, int version);
1354 static int merge_mid_and_cpref(int mid, int cpref);
1355 static int bci_at(unsigned int merged);
1356 static int version_at(unsigned int merged);
1357 static int mid_at(unsigned int merged);
1358 static int cpref_at(unsigned int merged);
1359 static int get_line_number(const methodHandle& method, int bci);
1360 static Symbol* get_source_file_name(InstanceKlass* holder, int version);
1361
1362 // Debugging
1363 friend class JavaClasses;
1364 };
1365
1366 // Interface to java.lang.StackFrameInfo objects
1367
1368 #define STACKFRAMEINFO_INJECTED_FIELDS(macro) \
1369 macro(java_lang_StackFrameInfo, version, short_signature, false)
1370
1371 class java_lang_StackFrameInfo: AllStatic {
1372 private:
1373 static int _declaringClass_offset;
1374 static int _memberName_offset;
1375 static int _bci_offset;
1376 static int _version_offset;
1377
1378 static Method* get_method(Handle stackFrame, InstanceKlass* holder, TRAPS);
1379
1380 public:
1381 // Setters
1382 static void set_declaringClass(oop info, oop value);
1383 static void set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, TRAPS);
1384 static void set_bci(oop info, int value);
1385
1386 static void set_version(oop info, short value);
1387
1388 static void compute_offsets();
1389
1390 static void to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS);
1391
1392 // Debugging
1393 friend class JavaClasses;
1394 };
1395
1396 class java_lang_LiveStackFrameInfo: AllStatic {
1397 private:
1398 static int _monitors_offset;
1399 static int _locals_offset;
1400 static int _operands_offset;
1401 static int _mode_offset;
1402
1403 public:
1404 static void set_monitors(oop info, oop value);
1405 static void set_locals(oop info, oop value);
1406 static void set_operands(oop info, oop value);
1407 static void set_mode(oop info, int value);
1408
1409 static void compute_offsets();
1410
1411 // Debugging
1412 friend class JavaClasses;
1413 };
1414
1415 // Interface to java.lang.AssertionStatusDirectives objects
1416
1417 class java_lang_AssertionStatusDirectives: AllStatic {
1418 private:
1419 enum {
1420 hc_classes_offset,
1421 hc_classEnabled_offset,
1422 hc_packages_offset,
1423 hc_packageEnabled_offset,
1424 hc_deflt_offset
1425 };
1426
1427 static int classes_offset;
1428 static int classEnabled_offset;
1429 static int packages_offset;
1430 static int packageEnabled_offset;
1431 static int deflt_offset;
1432
1433 public:
1434 // Setters
1435 static void set_classes(oop obj, oop val);
1436 static void set_classEnabled(oop obj, oop val);
1437 static void set_packages(oop obj, oop val);
1438 static void set_packageEnabled(oop obj, oop val);
1439 static void set_deflt(oop obj, bool val);
1440 // Debugging
1441 friend class JavaClasses;
1442 };
1443
1444
1445 class java_nio_Buffer: AllStatic {
1446 private:
1447 static int _limit_offset;
1448
1449 public:
1450 static int limit_offset();
1451 static void compute_offsets();
1452 };
1453
1454 class java_util_concurrent_locks_AbstractOwnableSynchronizer : AllStatic {
1455 private:
1456 static int _owner_offset;
1457 public:
1458 static void initialize(TRAPS);
1459 static oop get_owner_threadObj(oop obj);
1460 };
1461
1462 // Use to declare fields that need to be injected into Java classes
1463 // for the JVM to use. The name_index and signature_index are
1464 // declared in vmSymbols. The may_be_java flag is used to declare
1465 // fields that might already exist in Java but should be injected if
1466 // they don't. Otherwise the field is unconditionally injected and
1467 // the JVM uses the injected one. This is to ensure that name
1468 // collisions don't occur. In general may_be_java should be false
1469 // unless there's a good reason.
1470
1471 class InjectedField {
1472 public:
1473 const SystemDictionary::WKID klass_id;
1474 const vmSymbols::SID name_index;
1475 const vmSymbols::SID signature_index;
1476 const bool may_be_java;
1477
1478
1479 Klass* klass() const { return SystemDictionary::well_known_klass(klass_id); }
1480 Symbol* name() const { return lookup_symbol(name_index); }
1481 Symbol* signature() const { return lookup_symbol(signature_index); }
1482
1483 int compute_offset();
1484
1485 // Find the Symbol for this index
1486 static Symbol* lookup_symbol(int symbol_index) {
1487 return vmSymbols::symbol_at((vmSymbols::SID)symbol_index);
1488 }
1489 };
1490
1491 #define DECLARE_INJECTED_FIELD_ENUM(klass, name, signature, may_be_java) \
1492 klass##_##name##_enum,
1493
1494 #define ALL_INJECTED_FIELDS(macro) \
1495 CLASS_INJECTED_FIELDS(macro) \
1496 CLASSLOADER_INJECTED_FIELDS(macro) \
1497 RESOLVEDMETHOD_INJECTED_FIELDS(macro) \
1498 MEMBERNAME_INJECTED_FIELDS(macro) \
1499 CALLSITECONTEXT_INJECTED_FIELDS(macro) \
1500 STACKFRAMEINFO_INJECTED_FIELDS(macro) \
1501 MODULE_INJECTED_FIELDS(macro)
1502
1503 // Interface to hard-coded offset checking
1504
1505 class JavaClasses : AllStatic {
1506 private:
1507
1508 static InjectedField _injected_fields[];
1509
1510 static bool check_offset(const char *klass_name, int offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1511 static bool check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1512 static bool check_constant(const char *klass_name, int constant, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1513
1514 public:
1515 enum InjectedFieldID {
1516 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD_ENUM)
1517 MAX_enum
1518 };
1519
1520 static int compute_injected_offset(InjectedFieldID id);
1521
1522 static void compute_hard_coded_offsets();
1523 static void compute_offsets();
1524 static void check_offsets() PRODUCT_RETURN;
1525
1526 static InjectedField* get_injected(Symbol* class_name, int* field_count);
1527 };
1528
1529 #undef DECLARE_INJECTED_FIELD_ENUM
1530
1531 #endif // SHARE_VM_CLASSFILE_JAVACLASSES_HPP