1 /*
2 * Copyright (c) 1997, 2016, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_VM_CLASSFILE_JAVACLASSES_HPP
26 #define SHARE_VM_CLASSFILE_JAVACLASSES_HPP
27
28 #include "classfile/systemDictionary.hpp"
29 #include "jvmtifiles/jvmti.h"
30 #include "oops/oop.hpp"
31 #include "runtime/os.hpp"
32 #include "utilities/utf8.hpp"
33
34 // Interface for manipulating the basic Java classes.
35 //
36 // All dependencies on layout of actual Java classes should be kept here.
37 // If the layout of any of the classes above changes the offsets must be adjusted.
38 //
39 // For most classes we hardwire the offsets for performance reasons. In certain
40 // cases (e.g. java.security.AccessControlContext) we compute the offsets at
41 // startup since the layout here differs between JDK1.2 and JDK1.3.
42 //
43 // Note that fields (static and non-static) are arranged with oops before non-oops
44 // on a per class basis. The offsets below have to reflect this ordering.
45 //
46 // When editing the layouts please update the check_offset verification code
47 // correspondingly. The names in the enums must be identical to the actual field
48 // names in order for the verification code to work.
49
50
51 // Interface to java.lang.String objects
52
53 class java_lang_String : AllStatic {
54 private:
55 static int value_offset;
56 static int hash_offset;
57 static int coder_offset;
58
59 static bool initialized;
60
61 static Handle basic_create(int length, bool byte_arr, TRAPS);
62
63 static inline void set_coder(oop string, jbyte coder);
64
65 public:
66
67 // Coders
68 enum Coder {
69 CODER_LATIN1 = 0,
70 CODER_UTF16 = 1
71 };
72
73 static void compute_offsets();
74
75 // Instance creation
76 static Handle create_from_unicode(jchar* unicode, int len, TRAPS);
77 static oop create_oop_from_unicode(jchar* unicode, int len, TRAPS);
78 static Handle create_from_str(const char* utf8_str, TRAPS);
79 static oop create_oop_from_str(const char* utf8_str, TRAPS);
80 static Handle create_from_symbol(Symbol* symbol, TRAPS);
81 static Handle create_from_platform_dependent_str(const char* str, TRAPS);
82 static Handle char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS);
83
84 static bool has_hash_field() {
85 assert(initialized, "Must be initialized");
86 return (hash_offset > 0);
87 }
88 static bool has_coder_field() {
89 assert(initialized, "Must be initialized");
90 return (coder_offset > 0);
91 }
92
93 static void set_compact_strings(bool value);
94
95 static int value_offset_in_bytes() {
96 assert(initialized && (value_offset > 0), "Must be initialized");
97 return value_offset;
98 }
99 static int hash_offset_in_bytes() {
100 assert(initialized && (hash_offset > 0), "Must be initialized");
101 return hash_offset;
102 }
103 static int coder_offset_in_bytes() {
104 assert(initialized && (coder_offset > 0), "Must be initialized");
105 return coder_offset;
106 }
107
108 static inline void set_value_raw(oop string, typeArrayOop buffer);
109 static inline void set_value(oop string, typeArrayOop buffer);
110 static inline void set_hash(oop string, unsigned int hash);
111
112 // Accessors
113 static inline typeArrayOop value(oop java_string);
114 static inline unsigned int hash(oop java_string);
115 static inline bool is_latin1(oop java_string);
116 static inline int length(oop java_string);
117 static int utf8_length(oop java_string);
118
119 // String converters
120 static char* as_utf8_string(oop java_string);
121 static char* as_utf8_string(oop java_string, char* buf, int buflen);
122 static char* as_utf8_string(oop java_string, int start, int len);
123 static char* as_utf8_string(oop java_string, int start, int len, char* buf, int buflen);
124 static char* as_platform_dependent_str(Handle java_string, TRAPS);
125 static jchar* as_unicode_string(oop java_string, int& length, TRAPS);
126 // produce an ascii string with all other values quoted using \u####
127 static char* as_quoted_ascii(oop java_string);
128
129 // Compute the hash value for a java.lang.String object which would
130 // contain the characters passed in.
131 //
132 // As the hash value used by the String object itself, in
133 // String.hashCode(). This value is normally calculated in Java code
134 // in the String.hashCode method(), but is precomputed for String
135 // objects in the shared archive file.
136 // hash P(31) from Kernighan & Ritchie
137 //
138 // For this reason, THIS ALGORITHM MUST MATCH String.hashCode().
139 static unsigned int hash_code(const jchar* s, int len) {
140 unsigned int h = 0;
141 while (len-- > 0) {
142 h = 31*h + (unsigned int) *s;
143 s++;
144 }
145 return h;
146 }
147
148 static unsigned int hash_code(const jbyte* s, int len) {
149 unsigned int h = 0;
150 while (len-- > 0) {
151 h = 31*h + (((unsigned int) *s) & 0xFF);
152 s++;
153 }
154 return h;
155 }
156
157 static unsigned int hash_code(oop java_string);
158
159 static bool equals(oop java_string, jchar* chars, int len);
160 static bool equals(oop str1, oop str2);
161
162 // Conversion between '.' and '/' formats
163 static Handle externalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '/', '.', THREAD); }
164 static Handle internalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '.', '/', THREAD); }
165
166 // Conversion
167 static Symbol* as_symbol(Handle java_string, TRAPS);
168 static Symbol* as_symbol_or_null(oop java_string);
169
170 // Testers
171 static bool is_instance(oop obj);
172 static inline bool is_instance_inlined(oop obj);
173
174 // Debugging
175 static void print(oop java_string, outputStream* st);
176 friend class JavaClasses;
177 friend class StringTable;
178 };
179
180
181 // Interface to java.lang.Class objects
182
183 #define CLASS_INJECTED_FIELDS(macro) \
184 macro(java_lang_Class, klass, intptr_signature, false) \
185 macro(java_lang_Class, array_klass, intptr_signature, false) \
186 macro(java_lang_Class, oop_size, int_signature, false) \
187 macro(java_lang_Class, static_oop_field_count, int_signature, false) \
188 macro(java_lang_Class, protection_domain, object_signature, false) \
189 macro(java_lang_Class, signers, object_signature, false)
190
191 class java_lang_Class : AllStatic {
192 friend class VMStructs;
193 friend class JVMCIVMStructs;
194
195 private:
196 // The fake offsets are added by the class loader when java.lang.Class is loaded
197
198 static int _klass_offset;
199 static int _array_klass_offset;
200
201 static int _oop_size_offset;
202 static int _static_oop_field_count_offset;
203
204 static int _protection_domain_offset;
205 static int _init_lock_offset;
206 static int _signers_offset;
207 static int _class_loader_offset;
208 static int _module_offset;
209 static int _component_mirror_offset;
210
211 static bool offsets_computed;
212 static int classRedefinedCount_offset;
213
214 static GrowableArray<Klass*>* _fixup_mirror_list;
215 static GrowableArray<Klass*>* _fixup_module_field_list;
216
217 static void set_init_lock(oop java_class, oop init_lock);
218 static void set_protection_domain(oop java_class, oop protection_domain);
219 static void set_class_loader(oop java_class, oop class_loader);
220 static void set_component_mirror(oop java_class, oop comp_mirror);
221 static void initialize_mirror_fields(KlassHandle k, Handle mirror, Handle protection_domain, TRAPS);
222 public:
223 static void compute_offsets();
224
225 // Instance creation
226 static void create_mirror(KlassHandle k, Handle class_loader, Handle module,
227 Handle protection_domain, TRAPS);
228 static void fixup_mirror(KlassHandle k, TRAPS);
229 static oop create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS);
230
231 static void fixup_module_field(KlassHandle k, Handle module);
232
233 // Conversion
234 static Klass* as_Klass(oop java_class);
235 static void set_klass(oop java_class, Klass* klass);
236 static BasicType as_BasicType(oop java_class, Klass** reference_klass = NULL);
237 static BasicType as_BasicType(oop java_class, KlassHandle* reference_klass) {
238 Klass* refk_oop = NULL;
239 BasicType result = as_BasicType(java_class, &refk_oop);
240 (*reference_klass) = KlassHandle(refk_oop);
241 return result;
242 }
243 static Symbol* as_signature(oop java_class, bool intern_if_not_found, TRAPS);
244 static void print_signature(oop java_class, outputStream *st);
245 static const char* as_external_name(oop java_class);
246 // Testing
247 static bool is_instance(oop obj);
248
249 static bool is_primitive(oop java_class);
250 static BasicType primitive_type(oop java_class);
251 static oop primitive_mirror(BasicType t);
252 // JVM_NewArray support
253 static Klass* array_klass(oop java_class);
254 static void set_array_klass(oop java_class, Klass* klass);
255 // compiler support for class operations
256 static int klass_offset_in_bytes() { return _klass_offset; }
257 static int array_klass_offset_in_bytes() { return _array_klass_offset; }
258 // Support for classRedefinedCount field
259 static int classRedefinedCount(oop the_class_mirror);
260 static void set_classRedefinedCount(oop the_class_mirror, int value);
261
262 // Support for embedded per-class oops
263 static oop protection_domain(oop java_class);
264 static oop init_lock(oop java_class);
265 static oop component_mirror(oop java_class);
266 static objArrayOop signers(oop java_class);
267 static void set_signers(oop java_class, objArrayOop signers);
268
269 static oop class_loader(oop java_class);
270 static void set_module(oop java_class, oop module);
271 static oop module(oop java_class);
272
273 static int oop_size(oop java_class);
274 static int oop_size_offset() { return _oop_size_offset; }
275 static int static_oop_field_count(oop java_class);
276 static void set_static_oop_field_count(oop java_class, int size);
277
278 static GrowableArray<Klass*>* fixup_mirror_list() {
279 return _fixup_mirror_list;
280 }
281 static void set_fixup_mirror_list(GrowableArray<Klass*>* v) {
282 _fixup_mirror_list = v;
283 }
284
285 static GrowableArray<Klass*>* fixup_module_field_list() {
286 return _fixup_module_field_list;
287 }
288 static void set_fixup_module_field_list(GrowableArray<Klass*>* v) {
289 _fixup_module_field_list = v;
290 }
291
292 // Debugging
293 friend class JavaClasses;
294 friend class InstanceKlass; // verification code accesses offsets
295 friend class ClassFileParser; // access to number_of_fake_fields
296 };
297
298 // Interface to java.lang.Thread objects
299
300 class java_lang_Thread : AllStatic {
301 private:
302 // Note that for this class the layout changed between JDK1.2 and JDK1.3,
303 // so we compute the offsets at startup rather than hard-wiring them.
304 static int _name_offset;
305 static int _group_offset;
306 static int _contextClassLoader_offset;
307 static int _inheritedAccessControlContext_offset;
308 static int _priority_offset;
309 static int _eetop_offset;
310 static int _daemon_offset;
311 static int _stillborn_offset;
312 static int _stackSize_offset;
313 static int _tid_offset;
314 static int _thread_status_offset;
315 static int _park_blocker_offset;
316 static int _park_event_offset ;
317
318 static void compute_offsets();
319
320 public:
321 // Instance creation
322 static oop create();
323 // Returns the JavaThread associated with the thread obj
324 static JavaThread* thread(oop java_thread);
325 // Set JavaThread for instance
326 static void set_thread(oop java_thread, JavaThread* thread);
327 // Name
328 static oop name(oop java_thread);
329 static void set_name(oop java_thread, oop name);
330 // Priority
331 static ThreadPriority priority(oop java_thread);
332 static void set_priority(oop java_thread, ThreadPriority priority);
333 // Thread group
334 static oop threadGroup(oop java_thread);
335 // Stillborn
336 static bool is_stillborn(oop java_thread);
337 static void set_stillborn(oop java_thread);
338 // Alive (NOTE: this is not really a field, but provides the correct
339 // definition without doing a Java call)
340 static bool is_alive(oop java_thread);
341 // Daemon
342 static bool is_daemon(oop java_thread);
343 static void set_daemon(oop java_thread);
344 // Context ClassLoader
345 static oop context_class_loader(oop java_thread);
346 // Control context
347 static oop inherited_access_control_context(oop java_thread);
348 // Stack size hint
349 static jlong stackSize(oop java_thread);
350 // Thread ID
351 static jlong thread_id(oop java_thread);
352
353 // Blocker object responsible for thread parking
354 static oop park_blocker(oop java_thread);
355
356 // Pointer to type-stable park handler, encoded as jlong.
357 // Should be set when apparently null
358 // For details, see unsafe.cpp Unsafe_Unpark
359 static jlong park_event(oop java_thread);
360 static bool set_park_event(oop java_thread, jlong ptr);
361
362 // Java Thread Status for JVMTI and M&M use.
363 // This thread status info is saved in threadStatus field of
364 // java.lang.Thread java class.
365 enum ThreadStatus {
366 NEW = 0,
367 RUNNABLE = JVMTI_THREAD_STATE_ALIVE + // runnable / running
368 JVMTI_THREAD_STATE_RUNNABLE,
369 SLEEPING = JVMTI_THREAD_STATE_ALIVE + // Thread.sleep()
370 JVMTI_THREAD_STATE_WAITING +
371 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
372 JVMTI_THREAD_STATE_SLEEPING,
373 IN_OBJECT_WAIT = JVMTI_THREAD_STATE_ALIVE + // Object.wait()
374 JVMTI_THREAD_STATE_WAITING +
375 JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
376 JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
377 IN_OBJECT_WAIT_TIMED = JVMTI_THREAD_STATE_ALIVE + // Object.wait(long)
378 JVMTI_THREAD_STATE_WAITING +
379 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
380 JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
381 PARKED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park()
382 JVMTI_THREAD_STATE_WAITING +
383 JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
384 JVMTI_THREAD_STATE_PARKED,
385 PARKED_TIMED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park(long)
386 JVMTI_THREAD_STATE_WAITING +
387 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
388 JVMTI_THREAD_STATE_PARKED,
389 BLOCKED_ON_MONITOR_ENTER = JVMTI_THREAD_STATE_ALIVE + // (re-)entering a synchronization block
390 JVMTI_THREAD_STATE_BLOCKED_ON_MONITOR_ENTER,
391 TERMINATED = JVMTI_THREAD_STATE_TERMINATED
392 };
393 // Write thread status info to threadStatus field of java.lang.Thread.
394 static void set_thread_status(oop java_thread_oop, ThreadStatus status);
395 // Read thread status info from threadStatus field of java.lang.Thread.
396 static ThreadStatus get_thread_status(oop java_thread_oop);
397
398 static const char* thread_status_name(oop java_thread_oop);
399
400 // Debugging
401 friend class JavaClasses;
402 };
403
404 // Interface to java.lang.ThreadGroup objects
405
406 class java_lang_ThreadGroup : AllStatic {
407 private:
408 static int _parent_offset;
409 static int _name_offset;
410 static int _threads_offset;
411 static int _groups_offset;
412 static int _maxPriority_offset;
413 static int _destroyed_offset;
414 static int _daemon_offset;
415 static int _nthreads_offset;
416 static int _ngroups_offset;
417
418 static void compute_offsets();
419
420 public:
421 // parent ThreadGroup
422 static oop parent(oop java_thread_group);
423 // name
424 static const char* name(oop java_thread_group);
425 // ("name as oop" accessor is not necessary)
426 // Number of threads in group
427 static int nthreads(oop java_thread_group);
428 // threads
429 static objArrayOop threads(oop java_thread_group);
430 // Number of threads in group
431 static int ngroups(oop java_thread_group);
432 // groups
433 static objArrayOop groups(oop java_thread_group);
434 // maxPriority in group
435 static ThreadPriority maxPriority(oop java_thread_group);
436 // Destroyed
437 static bool is_destroyed(oop java_thread_group);
438 // Daemon
439 static bool is_daemon(oop java_thread_group);
440 // Debugging
441 friend class JavaClasses;
442 };
443
444
445
446 // Interface to java.lang.Throwable objects
447
448 class java_lang_Throwable: AllStatic {
449 friend class BacktraceBuilder;
450 friend class BacktraceIterator;
451
452 private:
453 // Offsets
454 enum {
455 hc_backtrace_offset = 0,
456 hc_detailMessage_offset = 1,
457 hc_cause_offset = 2, // New since 1.4
458 hc_stackTrace_offset = 3 // New since 1.4
459 };
460 enum {
461 hc_static_unassigned_stacktrace_offset = 0 // New since 1.7
462 };
463 // Trace constants
464 enum {
465 trace_methods_offset = 0,
466 trace_bcis_offset = 1,
467 trace_mirrors_offset = 2,
468 trace_cprefs_offset = 3,
469 trace_next_offset = 4,
470 trace_size = 5,
471 trace_chunk_size = 32
472 };
473
474 static int backtrace_offset;
475 static int detailMessage_offset;
476 static int stackTrace_offset;
477 static int depth_offset;
478 static int static_unassigned_stacktrace_offset;
479
480 // StackTrace (programmatic access, new since 1.4)
481 static void clear_stacktrace(oop throwable);
482 // Stacktrace (post JDK 1.7.0 to allow immutability protocol to be followed)
483 static void set_stacktrace(oop throwable, oop st_element_array);
484 static oop unassigned_stacktrace();
485
486 public:
487 // Backtrace
488 static oop backtrace(oop throwable);
489 static void set_backtrace(oop throwable, oop value);
490 static int depth(oop throwable);
491 static void set_depth(oop throwable, int value);
492 // Needed by JVMTI to filter out this internal field.
493 static int get_backtrace_offset() { return backtrace_offset;}
494 static int get_detailMessage_offset() { return detailMessage_offset;}
495 // Message
496 static oop message(Handle throwable);
497 static void set_message(oop throwable, oop value);
498 static Symbol* detail_message(oop throwable);
499 static void print_stack_element(outputStream *st, const methodHandle& method, int bci);
500 static void print_stack_usage(Handle stream);
501
502 static void compute_offsets();
503
504 // Allocate space for backtrace (created but stack trace not filled in)
505 static void allocate_backtrace(Handle throwable, TRAPS);
506 // Fill in current stack trace for throwable with preallocated backtrace (no GC)
507 static void fill_in_stack_trace_of_preallocated_backtrace(Handle throwable);
508 // Fill in current stack trace, can cause GC
509 static void fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS);
510 static void fill_in_stack_trace(Handle throwable, const methodHandle& method = methodHandle());
511 // Programmatic access to stack trace
512 static void get_stack_trace_elements(Handle throwable, objArrayHandle stack_trace, TRAPS);
513 // Printing
514 static void print(Handle throwable, outputStream* st);
515 static void print_stack_trace(Handle throwable, outputStream* st);
516 static void java_printStackTrace(Handle throwable, TRAPS);
517 // Debugging
518 friend class JavaClasses;
519 };
520
521
522 // Interface to java.lang.reflect.AccessibleObject objects
523
524 class java_lang_reflect_AccessibleObject: AllStatic {
525 private:
526 // Note that to reduce dependencies on the JDK we compute these
527 // offsets at run-time.
528 static int override_offset;
529
530 static void compute_offsets();
531
532 public:
533 // Accessors
534 static jboolean override(oop reflect);
535 static void set_override(oop reflect, jboolean value);
536
537 // Debugging
538 friend class JavaClasses;
539 };
540
541
542 // Interface to java.lang.reflect.Method objects
543
544 class java_lang_reflect_Method : public java_lang_reflect_AccessibleObject {
545 private:
546 // Note that to reduce dependencies on the JDK we compute these
547 // offsets at run-time.
548 static int clazz_offset;
549 static int name_offset;
550 static int returnType_offset;
551 static int parameterTypes_offset;
552 static int exceptionTypes_offset;
553 static int slot_offset;
554 static int modifiers_offset;
555 static int signature_offset;
556 static int annotations_offset;
557 static int parameter_annotations_offset;
558 static int annotation_default_offset;
559 static int type_annotations_offset;
560
561 static void compute_offsets();
562
563 public:
564 // Allocation
565 static Handle create(TRAPS);
566
567 // Accessors
568 static oop clazz(oop reflect);
569 static void set_clazz(oop reflect, oop value);
570
571 static oop name(oop method);
572 static void set_name(oop method, oop value);
573
574 static oop return_type(oop method);
575 static void set_return_type(oop method, oop value);
576
577 static oop parameter_types(oop method);
578 static void set_parameter_types(oop method, oop value);
579
580 static oop exception_types(oop method);
581 static void set_exception_types(oop method, oop value);
582
583 static int slot(oop reflect);
584 static void set_slot(oop reflect, int value);
585
586 static int modifiers(oop method);
587 static void set_modifiers(oop method, int value);
588
589 static bool has_signature_field();
590 static oop signature(oop method);
591 static void set_signature(oop method, oop value);
592
593 static bool has_annotations_field();
594 static oop annotations(oop method);
595 static void set_annotations(oop method, oop value);
596
597 static bool has_parameter_annotations_field();
598 static oop parameter_annotations(oop method);
599 static void set_parameter_annotations(oop method, oop value);
600
601 static bool has_annotation_default_field();
602 static oop annotation_default(oop method);
603 static void set_annotation_default(oop method, oop value);
604
605 static bool has_type_annotations_field();
606 static oop type_annotations(oop method);
607 static void set_type_annotations(oop method, oop value);
608
609 // Debugging
610 friend class JavaClasses;
611 };
612
613
614 // Interface to java.lang.reflect.Constructor objects
615
616 class java_lang_reflect_Constructor : public java_lang_reflect_AccessibleObject {
617 private:
618 // Note that to reduce dependencies on the JDK we compute these
619 // offsets at run-time.
620 static int clazz_offset;
621 static int parameterTypes_offset;
622 static int exceptionTypes_offset;
623 static int slot_offset;
624 static int modifiers_offset;
625 static int signature_offset;
626 static int annotations_offset;
627 static int parameter_annotations_offset;
628 static int type_annotations_offset;
629
630 static void compute_offsets();
631
632 public:
633 // Allocation
634 static Handle create(TRAPS);
635
636 // Accessors
637 static oop clazz(oop reflect);
638 static void set_clazz(oop reflect, oop value);
639
640 static oop parameter_types(oop constructor);
641 static void set_parameter_types(oop constructor, oop value);
642
643 static oop exception_types(oop constructor);
644 static void set_exception_types(oop constructor, oop value);
645
646 static int slot(oop reflect);
647 static void set_slot(oop reflect, int value);
648
649 static int modifiers(oop constructor);
650 static void set_modifiers(oop constructor, int value);
651
652 static bool has_signature_field();
653 static oop signature(oop constructor);
654 static void set_signature(oop constructor, oop value);
655
656 static bool has_annotations_field();
657 static oop annotations(oop constructor);
658 static void set_annotations(oop constructor, oop value);
659
660 static bool has_parameter_annotations_field();
661 static oop parameter_annotations(oop method);
662 static void set_parameter_annotations(oop method, oop value);
663
664 static bool has_type_annotations_field();
665 static oop type_annotations(oop constructor);
666 static void set_type_annotations(oop constructor, oop value);
667
668 // Debugging
669 friend class JavaClasses;
670 };
671
672
673 // Interface to java.lang.reflect.Field objects
674
675 class java_lang_reflect_Field : public java_lang_reflect_AccessibleObject {
676 private:
677 // Note that to reduce dependencies on the JDK we compute these
678 // offsets at run-time.
679 static int clazz_offset;
680 static int name_offset;
681 static int type_offset;
682 static int slot_offset;
683 static int modifiers_offset;
684 static int signature_offset;
685 static int annotations_offset;
686 static int type_annotations_offset;
687
688 static void compute_offsets();
689
690 public:
691 // Allocation
692 static Handle create(TRAPS);
693
694 // Accessors
695 static oop clazz(oop reflect);
696 static void set_clazz(oop reflect, oop value);
697
698 static oop name(oop field);
699 static void set_name(oop field, oop value);
700
701 static oop type(oop field);
702 static void set_type(oop field, oop value);
703
704 static int slot(oop reflect);
705 static void set_slot(oop reflect, int value);
706
707 static int modifiers(oop field);
708 static void set_modifiers(oop field, int value);
709
710 static bool has_signature_field();
711 static oop signature(oop constructor);
712 static void set_signature(oop constructor, oop value);
713
714 static bool has_annotations_field();
715 static oop annotations(oop constructor);
716 static void set_annotations(oop constructor, oop value);
717
718 static bool has_parameter_annotations_field();
719 static oop parameter_annotations(oop method);
720 static void set_parameter_annotations(oop method, oop value);
721
722 static bool has_annotation_default_field();
723 static oop annotation_default(oop method);
724 static void set_annotation_default(oop method, oop value);
725
726 static bool has_type_annotations_field();
727 static oop type_annotations(oop field);
728 static void set_type_annotations(oop field, oop value);
729
730 // Debugging
731 friend class JavaClasses;
732 };
733
734 class java_lang_reflect_Parameter {
735 private:
736 // Note that to reduce dependencies on the JDK we compute these
737 // offsets at run-time.
738 static int name_offset;
739 static int modifiers_offset;
740 static int index_offset;
741 static int executable_offset;
742
743 static void compute_offsets();
744
745 public:
746 // Allocation
747 static Handle create(TRAPS);
748
749 // Accessors
750 static oop name(oop field);
751 static void set_name(oop field, oop value);
752
753 static int index(oop reflect);
754 static void set_index(oop reflect, int value);
755
756 static int modifiers(oop reflect);
757 static void set_modifiers(oop reflect, int value);
758
759 static oop executable(oop constructor);
760 static void set_executable(oop constructor, oop value);
761
762 friend class JavaClasses;
763 };
764
765 #define MODULE_INJECTED_FIELDS(macro) \
766 macro(java_lang_reflect_Module, module_entry, intptr_signature, false)
767
768 class java_lang_reflect_Module {
769 private:
770 static int loader_offset;
771 static int name_offset;
772 static int _module_entry_offset;
773 static void compute_offsets();
774
775 public:
776 // Allocation
777 static Handle create(Handle loader, Handle module_name, TRAPS);
778
779 // Testers
780 static bool is_subclass(Klass* klass) {
781 return klass->is_subclass_of(SystemDictionary::reflect_Module_klass());
782 }
783 static bool is_instance(oop obj);
784
785 // Accessors
786 static oop loader(oop module);
787 static void set_loader(oop module, oop value);
788
789 static oop name(oop module);
790 static void set_name(oop module, oop value);
791
792 static ModuleEntry* module_entry(oop module, TRAPS);
793 static void set_module_entry(oop module, ModuleEntry* module_entry);
794
795 friend class JavaClasses;
796 };
797
798 // Interface to jdk.internal.reflect.ConstantPool objects
799 class reflect_ConstantPool {
800 private:
801 // Note that to reduce dependencies on the JDK we compute these
802 // offsets at run-time.
803 static int _oop_offset;
804
805 static void compute_offsets();
806
807 public:
808 // Allocation
809 static Handle create(TRAPS);
810
811 // Accessors
812 static void set_cp(oop reflect, ConstantPool* value);
813 static int oop_offset() {
814 return _oop_offset;
815 }
816
817 static ConstantPool* get_cp(oop reflect);
818
819 // Debugging
820 friend class JavaClasses;
821 };
822
823 // Interface to jdk.internal.reflect.UnsafeStaticFieldAccessorImpl objects
824 class reflect_UnsafeStaticFieldAccessorImpl {
825 private:
826 static int _base_offset;
827 static void compute_offsets();
828
829 public:
830 static int base_offset() {
831 return _base_offset;
832 }
833
834 // Debugging
835 friend class JavaClasses;
836 };
837
838 // Interface to java.lang primitive type boxing objects:
839 // - java.lang.Boolean
840 // - java.lang.Character
841 // - java.lang.Float
842 // - java.lang.Double
843 // - java.lang.Byte
844 // - java.lang.Short
845 // - java.lang.Integer
846 // - java.lang.Long
847
848 // This could be separated out into 8 individual classes.
849
850 class java_lang_boxing_object: AllStatic {
851 private:
852 enum {
853 hc_value_offset = 0
854 };
855 static int value_offset;
856 static int long_value_offset;
857
858 static oop initialize_and_allocate(BasicType type, TRAPS);
859 public:
860 // Allocation. Returns a boxed value, or NULL for invalid type.
861 static oop create(BasicType type, jvalue* value, TRAPS);
862 // Accessors. Returns the basic type being boxed, or T_ILLEGAL for invalid oop.
863 static BasicType get_value(oop box, jvalue* value);
864 static BasicType set_value(oop box, jvalue* value);
865 static BasicType basic_type(oop box);
866 static bool is_instance(oop box) { return basic_type(box) != T_ILLEGAL; }
867 static bool is_instance(oop box, BasicType type) { return basic_type(box) == type; }
868 static void print(oop box, outputStream* st) { jvalue value; print(get_value(box, &value), &value, st); }
869 static void print(BasicType type, jvalue* value, outputStream* st);
870
871 static int value_offset_in_bytes(BasicType type) {
872 return ( type == T_LONG || type == T_DOUBLE ) ? long_value_offset :
873 value_offset;
874 }
875
876 // Debugging
877 friend class JavaClasses;
878 };
879
880
881
882 // Interface to java.lang.ref.Reference objects
883
884 class java_lang_ref_Reference: AllStatic {
885 public:
886 enum {
887 hc_referent_offset = 0,
888 hc_queue_offset = 1,
889 hc_next_offset = 2,
890 hc_discovered_offset = 3 // Is not last, see SoftRefs.
891 };
892 enum {
893 hc_static_lock_offset = 0,
894 hc_static_pending_offset = 1
895 };
896
897 static int referent_offset;
898 static int queue_offset;
899 static int next_offset;
900 static int discovered_offset;
901 static int static_lock_offset;
902 static int static_pending_offset;
903 static int number_of_fake_oop_fields;
904
905 // Accessors
906 static inline oop referent(oop ref);
907 static inline void set_referent(oop ref, oop value);
908 static inline void set_referent_raw(oop ref, oop value);
909 static inline HeapWord* referent_addr(oop ref);
910 static inline oop next(oop ref);
911 static inline void set_next(oop ref, oop value);
912 static inline void set_next_raw(oop ref, oop value);
913 static inline HeapWord* next_addr(oop ref);
914 static inline oop discovered(oop ref);
915 static inline void set_discovered(oop ref, oop value);
916 static inline void set_discovered_raw(oop ref, oop value);
917 static inline HeapWord* discovered_addr(oop ref);
918
919 // Accessors for statics
920 static oop pending_list_lock();
921 static oop pending_list();
922
923 static HeapWord* pending_list_lock_addr();
924 static HeapWord* pending_list_addr();
925 };
926
927
928 // Interface to java.lang.ref.SoftReference objects
929
930 class java_lang_ref_SoftReference: public java_lang_ref_Reference {
931 public:
932 enum {
933 // The timestamp is a long field and may need to be adjusted for alignment.
934 hc_timestamp_offset = hc_discovered_offset + 1
935 };
936 enum {
937 hc_static_clock_offset = 0
938 };
939
940 static int timestamp_offset;
941 static int static_clock_offset;
942
943 // Accessors
944 static jlong timestamp(oop ref);
945
946 // Accessors for statics
947 static jlong clock();
948 static void set_clock(jlong value);
949 };
950
951 // Interface to java.lang.invoke.MethodHandle objects
952
953 class MethodHandleEntry;
954
955 class java_lang_invoke_MethodHandle: AllStatic {
956 friend class JavaClasses;
957
958 private:
959 static int _type_offset; // the MethodType of this MH
960 static int _form_offset; // the LambdaForm of this MH
961
962 static void compute_offsets();
963
964 public:
965 // Accessors
966 static oop type(oop mh);
967 static void set_type(oop mh, oop mtype);
968
969 static oop form(oop mh);
970 static void set_form(oop mh, oop lform);
971
972 // Testers
973 static bool is_subclass(Klass* klass) {
974 return klass->is_subclass_of(SystemDictionary::MethodHandle_klass());
975 }
976 static bool is_instance(oop obj);
977
978 // Accessors for code generation:
979 static int type_offset_in_bytes() { return _type_offset; }
980 static int form_offset_in_bytes() { return _form_offset; }
981 };
982
983 // Interface to java.lang.invoke.DirectMethodHandle objects
984
985 class java_lang_invoke_DirectMethodHandle: AllStatic {
986 friend class JavaClasses;
987
988 private:
989 static int _member_offset; // the MemberName of this DMH
990
991 static void compute_offsets();
992
993 public:
994 // Accessors
995 static oop member(oop mh);
996
997 // Testers
998 static bool is_subclass(Klass* klass) {
999 return klass->is_subclass_of(SystemDictionary::DirectMethodHandle_klass());
1000 }
1001 static bool is_instance(oop obj);
1002
1003 // Accessors for code generation:
1004 static int member_offset_in_bytes() { return _member_offset; }
1005 };
1006
1007 // Interface to java.lang.invoke.LambdaForm objects
1008 // (These are a private interface for managing adapter code generation.)
1009
1010 class java_lang_invoke_LambdaForm: AllStatic {
1011 friend class JavaClasses;
1012
1013 private:
1014 static int _vmentry_offset; // type is MemberName
1015
1016 static void compute_offsets();
1017
1018 public:
1019 // Accessors
1020 static oop vmentry(oop lform);
1021 static void set_vmentry(oop lform, oop invoker);
1022
1023 // Testers
1024 static bool is_subclass(Klass* klass) {
1025 return SystemDictionary::LambdaForm_klass() != NULL &&
1026 klass->is_subclass_of(SystemDictionary::LambdaForm_klass());
1027 }
1028 static bool is_instance(oop obj);
1029
1030 // Accessors for code generation:
1031 static int vmentry_offset_in_bytes() { return _vmentry_offset; }
1032 };
1033
1034
1035 // Interface to java.lang.invoke.MemberName objects
1036 // (These are a private interface for Java code to query the class hierarchy.)
1037
1038 #define MEMBERNAME_INJECTED_FIELDS(macro) \
1039 macro(java_lang_invoke_MemberName, vmloader, object_signature, false) \
1040 macro(java_lang_invoke_MemberName, vmindex, intptr_signature, false) \
1041 macro(java_lang_invoke_MemberName, vmtarget, intptr_signature, false)
1042
1043 class java_lang_invoke_MemberName: AllStatic {
1044 friend class JavaClasses;
1045
1046 private:
1047 // From java.lang.invoke.MemberName:
1048 // private Class<?> clazz; // class in which the method is defined
1049 // private String name; // may be null if not yet materialized
1050 // private Object type; // may be null if not yet materialized
1051 // private int flags; // modifier bits; see reflect.Modifier
1052 // private intptr vmtarget; // VM-specific target value
1053 // private intptr_t vmindex; // member index within class or interface
1054 static int _clazz_offset;
1055 static int _name_offset;
1056 static int _type_offset;
1057 static int _flags_offset;
1058 static int _vmtarget_offset;
1059 static int _vmloader_offset;
1060 static int _vmindex_offset;
1061
1062 static void compute_offsets();
1063
1064 public:
1065 // Accessors
1066 static oop clazz(oop mname);
1067 static void set_clazz(oop mname, oop clazz);
1068
1069 static oop type(oop mname);
1070 static void set_type(oop mname, oop type);
1071
1072 static oop name(oop mname);
1073 static void set_name(oop mname, oop name);
1074
1075 static int flags(oop mname);
1076 static void set_flags(oop mname, int flags);
1077
1078 static Metadata* vmtarget(oop mname);
1079 static void set_vmtarget(oop mname, Metadata* target);
1080
1081 static intptr_t vmindex(oop mname);
1082 static void set_vmindex(oop mname, intptr_t index);
1083
1084 // Testers
1085 static bool is_subclass(Klass* klass) {
1086 return klass->is_subclass_of(SystemDictionary::MemberName_klass());
1087 }
1088 static bool is_instance(oop obj);
1089
1090 static bool is_method(oop obj);
1091
1092 // Relevant integer codes (keep these in synch. with MethodHandleNatives.Constants):
1093 enum {
1094 MN_IS_METHOD = 0x00010000, // method (not constructor)
1095 MN_IS_CONSTRUCTOR = 0x00020000, // constructor
1096 MN_IS_FIELD = 0x00040000, // field
1097 MN_IS_TYPE = 0x00080000, // nested type
1098 MN_CALLER_SENSITIVE = 0x00100000, // @CallerSensitive annotation detected
1099 MN_REFERENCE_KIND_SHIFT = 24, // refKind
1100 MN_REFERENCE_KIND_MASK = 0x0F000000 >> MN_REFERENCE_KIND_SHIFT,
1101 // The SEARCH_* bits are not for MN.flags but for the matchFlags argument of MHN.getMembers:
1102 MN_SEARCH_SUPERCLASSES = 0x00100000, // walk super classes
1103 MN_SEARCH_INTERFACES = 0x00200000 // walk implemented interfaces
1104 };
1105
1106 // Accessors for code generation:
1107 static int clazz_offset_in_bytes() { return _clazz_offset; }
1108 static int type_offset_in_bytes() { return _type_offset; }
1109 static int name_offset_in_bytes() { return _name_offset; }
1110 static int flags_offset_in_bytes() { return _flags_offset; }
1111 static int vmtarget_offset_in_bytes() { return _vmtarget_offset; }
1112 static int vmindex_offset_in_bytes() { return _vmindex_offset; }
1113
1114 static bool equals(oop mt1, oop mt2);
1115 };
1116
1117
1118 // Interface to java.lang.invoke.MethodType objects
1119
1120 class java_lang_invoke_MethodType: AllStatic {
1121 friend class JavaClasses;
1122
1123 private:
1124 static int _rtype_offset;
1125 static int _ptypes_offset;
1126
1127 static void compute_offsets();
1128
1129 public:
1130 // Accessors
1131 static oop rtype(oop mt);
1132 static objArrayOop ptypes(oop mt);
1133
1134 static oop ptype(oop mt, int index);
1135 static int ptype_count(oop mt);
1136
1137 static int ptype_slot_count(oop mt); // extra counts for long/double
1138 static int rtype_slot_count(oop mt); // extra counts for long/double
1139
1140 static Symbol* as_signature(oop mt, bool intern_if_not_found, TRAPS);
1141 static void print_signature(oop mt, outputStream* st);
1142
1143 static bool is_instance(oop obj);
1144
1145 static bool equals(oop mt1, oop mt2);
1146
1147 // Accessors for code generation:
1148 static int rtype_offset_in_bytes() { return _rtype_offset; }
1149 static int ptypes_offset_in_bytes() { return _ptypes_offset; }
1150 };
1151
1152
1153 // Interface to java.lang.invoke.CallSite objects
1154
1155 class java_lang_invoke_CallSite: AllStatic {
1156 friend class JavaClasses;
1157
1158 private:
1159 static int _target_offset;
1160 static int _context_offset;
1161
1162 static void compute_offsets();
1163
1164 public:
1165 // Accessors
1166 static oop target( oop site);
1167 static void set_target( oop site, oop target);
1168 static void set_target_volatile( oop site, oop target);
1169
1170 static oop context(oop site);
1171
1172 // Testers
1173 static bool is_subclass(Klass* klass) {
1174 return klass->is_subclass_of(SystemDictionary::CallSite_klass());
1175 }
1176 static bool is_instance(oop obj);
1177
1178 // Accessors for code generation:
1179 static int target_offset_in_bytes() { return _target_offset; }
1180 };
1181
1182 // Interface to java.lang.invoke.MethodHandleNatives$CallSiteContext objects
1183
1184 #define CALLSITECONTEXT_INJECTED_FIELDS(macro) \
1185 macro(java_lang_invoke_MethodHandleNatives_CallSiteContext, vmdependencies, intptr_signature, false)
1186
1187 class DependencyContext;
1188
1189 class java_lang_invoke_MethodHandleNatives_CallSiteContext : AllStatic {
1190 friend class JavaClasses;
1191
1192 private:
1193 static int _vmdependencies_offset;
1194
1195 static void compute_offsets();
1196
1197 public:
1198 // Accessors
1199 static DependencyContext vmdependencies(oop context);
1200
1201 // Testers
1202 static bool is_subclass(Klass* klass) {
1203 return klass->is_subclass_of(SystemDictionary::Context_klass());
1204 }
1205 static bool is_instance(oop obj);
1206 };
1207
1208 // Interface to java.security.AccessControlContext objects
1209
1210 class java_security_AccessControlContext: AllStatic {
1211 private:
1212 // Note that for this class the layout changed between JDK1.2 and JDK1.3,
1213 // so we compute the offsets at startup rather than hard-wiring them.
1214 static int _context_offset;
1215 static int _privilegedContext_offset;
1216 static int _isPrivileged_offset;
1217 static int _isAuthorized_offset;
1218
1219 static void compute_offsets();
1220 public:
1221 static oop create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS);
1222
1223 static bool is_authorized(Handle context);
1224
1225 // Debugging/initialization
1226 friend class JavaClasses;
1227 };
1228
1229
1230 // Interface to java.lang.ClassLoader objects
1231
1232 #define CLASSLOADER_INJECTED_FIELDS(macro) \
1233 macro(java_lang_ClassLoader, loader_data, intptr_signature, false)
1234
1235 class java_lang_ClassLoader : AllStatic {
1236 private:
1237 // The fake offsets are added by the class loader when java.lang.Class is loaded
1238 enum {
1239 hc_parent_offset = 0
1240 };
1241 static int _loader_data_offset;
1242 static bool offsets_computed;
1243 static int parent_offset;
1244 static int parallelCapable_offset;
1245 static int unnamedModule_offset;
1246
1247 public:
1248 static void compute_offsets();
1249
1250 static ClassLoaderData** loader_data_addr(oop loader);
1251 static ClassLoaderData* loader_data(oop loader);
1252
1253 static oop parent(oop loader);
1254 static bool isAncestor(oop loader, oop cl);
1255
1256 // Support for parallelCapable field
1257 static bool parallelCapable(oop the_class_mirror);
1258
1259 static bool is_trusted_loader(oop loader);
1260
1261 // Fix for 4474172
1262 static oop non_reflection_class_loader(oop loader);
1263
1264 // Testers
1265 static bool is_subclass(Klass* klass) {
1266 return klass->is_subclass_of(SystemDictionary::ClassLoader_klass());
1267 }
1268 static bool is_instance(oop obj);
1269
1270 static oop unnamedModule(oop loader);
1271
1272 // Debugging
1273 friend class JavaClasses;
1274 friend class ClassFileParser; // access to number_of_fake_fields
1275 };
1276
1277
1278 // Interface to java.lang.System objects
1279
1280 class java_lang_System : AllStatic {
1281 private:
1282 enum {
1283 hc_static_in_offset = 0,
1284 hc_static_out_offset = 1,
1285 hc_static_err_offset = 2,
1286 hc_static_security_offset = 3
1287 };
1288
1289 static int static_in_offset;
1290 static int static_out_offset;
1291 static int static_err_offset;
1292 static int static_security_offset;
1293
1294 public:
1295 static int in_offset_in_bytes();
1296 static int out_offset_in_bytes();
1297 static int err_offset_in_bytes();
1298
1299 static bool has_security_manager();
1300
1301 // Debugging
1302 friend class JavaClasses;
1303 };
1304
1305
1306 // Interface to java.lang.StackTraceElement objects
1307
1308 class java_lang_StackTraceElement: AllStatic {
1309 private:
1310 enum {
1311 hc_moduleName_offset = 0,
1312 hc_moduleVersion_offset = 1,
1313 hc_declaringClass_offset = 2,
1314 hc_methodName_offset = 3,
1315 hc_fileName_offset = 4,
1316 hc_lineNumber_offset = 5
1317 };
1318
1319 static int moduleName_offset;
1320 static int moduleVersion_offset;
1321 static int declaringClass_offset;
1322 static int methodName_offset;
1323 static int fileName_offset;
1324 static int lineNumber_offset;
1325
1326 // Setters
1327 static void set_moduleName(oop element, oop value);
1328 static void set_moduleVersion(oop element, oop value);
1329 static void set_declaringClass(oop element, oop value);
1330 static void set_methodName(oop element, oop value);
1331 static void set_fileName(oop element, oop value);
1332 static void set_lineNumber(oop element, int value);
1333
1334 public:
1335 // Create an instance of StackTraceElement
1336 static oop create(const methodHandle& method, int bci, TRAPS);
1337
1338 static void fill_in(Handle element, InstanceKlass* holder, const methodHandle& method,
1339 int version, int bci, int cpref, TRAPS);
1340
1341 // Debugging
1342 friend class JavaClasses;
1343 };
1344
1345
1346 class Backtrace: AllStatic {
1347 public:
1348 // Helper backtrace functions to store bci|version together.
1349 static int merge_bci_and_version(int bci, int version);
1350 static int merge_mid_and_cpref(int mid, int cpref);
1351 static int bci_at(unsigned int merged);
1352 static int version_at(unsigned int merged);
1353 static int mid_at(unsigned int merged);
1354 static int cpref_at(unsigned int merged);
1355 static int get_line_number(const methodHandle& method, int bci);
1356 static Symbol* get_source_file_name(InstanceKlass* holder, int version);
1357
1358 // Debugging
1359 friend class JavaClasses;
1360 };
1361
1362 // Interface to java.lang.StackFrameInfo objects
1363
1364 #define STACKFRAMEINFO_INJECTED_FIELDS(macro) \
1365 macro(java_lang_StackFrameInfo, version, short_signature, false)
1366
1367 class java_lang_StackFrameInfo: AllStatic {
1368 private:
1369 static int _declaringClass_offset;
1370 static int _memberName_offset;
1371 static int _bci_offset;
1372 static int _version_offset;
1373
1374 static Method* get_method(Handle stackFrame, InstanceKlass* holder, TRAPS);
1375
1376 public:
1377 // Setters
1378 static void set_declaringClass(oop info, oop value);
1379 static void set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci);
1380 static void set_bci(oop info, int value);
1381
1382 static void set_version(oop info, short value);
1383
1384 static void compute_offsets();
1385
1386 static void to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS);
1387
1388 // Debugging
1389 friend class JavaClasses;
1390 };
1391
1392 class java_lang_LiveStackFrameInfo: AllStatic {
1393 private:
1394 static int _monitors_offset;
1395 static int _locals_offset;
1396 static int _operands_offset;
1397
1398 public:
1399 static void set_monitors(oop info, oop value);
1400 static void set_locals(oop info, oop value);
1401 static void set_operands(oop info, oop value);
1402
1403 static void compute_offsets();
1404
1405 // Debugging
1406 friend class JavaClasses;
1407 };
1408
1409 // Interface to java.lang.AssertionStatusDirectives objects
1410
1411 class java_lang_AssertionStatusDirectives: AllStatic {
1412 private:
1413 enum {
1414 hc_classes_offset,
1415 hc_classEnabled_offset,
1416 hc_packages_offset,
1417 hc_packageEnabled_offset,
1418 hc_deflt_offset
1419 };
1420
1421 static int classes_offset;
1422 static int classEnabled_offset;
1423 static int packages_offset;
1424 static int packageEnabled_offset;
1425 static int deflt_offset;
1426
1427 public:
1428 // Setters
1429 static void set_classes(oop obj, oop val);
1430 static void set_classEnabled(oop obj, oop val);
1431 static void set_packages(oop obj, oop val);
1432 static void set_packageEnabled(oop obj, oop val);
1433 static void set_deflt(oop obj, bool val);
1434 // Debugging
1435 friend class JavaClasses;
1436 };
1437
1438
1439 class java_nio_Buffer: AllStatic {
1440 private:
1441 static int _limit_offset;
1442
1443 public:
1444 static int limit_offset();
1445 static void compute_offsets();
1446 };
1447
1448 class java_util_concurrent_locks_AbstractOwnableSynchronizer : AllStatic {
1449 private:
1450 static int _owner_offset;
1451 public:
1452 static void initialize(TRAPS);
1453 static oop get_owner_threadObj(oop obj);
1454 };
1455
1456 // Use to declare fields that need to be injected into Java classes
1457 // for the JVM to use. The name_index and signature_index are
1458 // declared in vmSymbols. The may_be_java flag is used to declare
1459 // fields that might already exist in Java but should be injected if
1460 // they don't. Otherwise the field is unconditionally injected and
1461 // the JVM uses the injected one. This is to ensure that name
1462 // collisions don't occur. In general may_be_java should be false
1463 // unless there's a good reason.
1464
1465 class InjectedField {
1466 public:
1467 const SystemDictionary::WKID klass_id;
1468 const vmSymbols::SID name_index;
1469 const vmSymbols::SID signature_index;
1470 const bool may_be_java;
1471
1472
1473 Klass* klass() const { return SystemDictionary::well_known_klass(klass_id); }
1474 Symbol* name() const { return lookup_symbol(name_index); }
1475 Symbol* signature() const { return lookup_symbol(signature_index); }
1476
1477 int compute_offset();
1478
1479 // Find the Symbol for this index
1480 static Symbol* lookup_symbol(int symbol_index) {
1481 return vmSymbols::symbol_at((vmSymbols::SID)symbol_index);
1482 }
1483 };
1484
1485 #define DECLARE_INJECTED_FIELD_ENUM(klass, name, signature, may_be_java) \
1486 klass##_##name##_enum,
1487
1488 #define ALL_INJECTED_FIELDS(macro) \
1489 CLASS_INJECTED_FIELDS(macro) \
1490 CLASSLOADER_INJECTED_FIELDS(macro) \
1491 MEMBERNAME_INJECTED_FIELDS(macro) \
1492 CALLSITECONTEXT_INJECTED_FIELDS(macro) \
1493 STACKFRAMEINFO_INJECTED_FIELDS(macro) \
1494 MODULE_INJECTED_FIELDS(macro)
1495
1496 // Interface to hard-coded offset checking
1497
1498 class JavaClasses : AllStatic {
1499 private:
1500
1501 static InjectedField _injected_fields[];
1502
1503 static bool check_offset(const char *klass_name, int offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1504 static bool check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1505 static bool check_constant(const char *klass_name, int constant, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1506
1507 public:
1508 enum InjectedFieldID {
1509 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD_ENUM)
1510 MAX_enum
1511 };
1512
1513 static int compute_injected_offset(InjectedFieldID id);
1514
1515 static void compute_hard_coded_offsets();
1516 static void compute_offsets();
1517 static void check_offsets() PRODUCT_RETURN;
1518
1519 static InjectedField* get_injected(Symbol* class_name, int* field_count);
1520 };
1521
1522 #undef DECLARE_INJECTED_FIELD_ENUM
1523
1524 #endif // SHARE_VM_CLASSFILE_JAVACLASSES_HPP