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