1 /*
2 * Copyright (c) 1997, 2017, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_VM_CLASSFILE_JAVACLASSES_HPP
26 #define SHARE_VM_CLASSFILE_JAVACLASSES_HPP
27
28 #include "classfile/systemDictionary.hpp"
29 #include "jvmtifiles/jvmti.h"
30 #include "oops/oop.hpp"
31 #include "runtime/os.hpp"
32 #include "utilities/utf8.hpp"
33
34 // Interface for manipulating the basic Java classes.
35 //
36 // All dependencies on layout of actual Java classes should be kept here.
37 // If the layout of any of the classes above changes the offsets must be adjusted.
38 //
39 // For most classes we hardwire the offsets for performance reasons. In certain
40 // cases (e.g. java.security.AccessControlContext) we compute the offsets at
41 // startup since the layout here differs between JDK1.2 and JDK1.3.
42 //
43 // Note that fields (static and non-static) are arranged with oops before non-oops
44 // on a per class basis. The offsets below have to reflect this ordering.
45 //
46 // When editing the layouts please update the check_offset verification code
47 // correspondingly. The names in the enums must be identical to the actual field
48 // names in order for the verification code to work.
49
50
51 // Interface to java.lang.String objects
52
53 class java_lang_String : AllStatic {
54 private:
55 static int value_offset;
56 static int hash_offset;
57 static int coder_offset;
58
59 static bool initialized;
60
61 static Handle basic_create(int length, bool byte_arr, TRAPS);
62
63 static inline void set_coder(oop string, jbyte coder);
64
65 public:
66
67 // Coders
68 enum Coder {
69 CODER_LATIN1 = 0,
70 CODER_UTF16 = 1
71 };
72
73 static void compute_offsets();
74
75 // Instance creation
76 static Handle create_from_unicode(jchar* unicode, int len, TRAPS);
77 static oop create_oop_from_unicode(jchar* unicode, int len, TRAPS);
78 static Handle create_from_str(const char* utf8_str, TRAPS);
79 static oop create_oop_from_str(const char* utf8_str, TRAPS);
80 static Handle create_from_symbol(Symbol* symbol, TRAPS);
81 static Handle create_from_platform_dependent_str(const char* str, TRAPS);
82 static Handle char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS);
83
84 static void set_compact_strings(bool value);
85
86 static int value_offset_in_bytes() {
87 assert(initialized && (value_offset > 0), "Must be initialized");
88 return value_offset;
89 }
90 static int hash_offset_in_bytes() {
91 assert(initialized && (hash_offset > 0), "Must be initialized");
92 return hash_offset;
93 }
94 static int coder_offset_in_bytes() {
95 assert(initialized && (coder_offset > 0), "Must be initialized");
96 return coder_offset;
97 }
98
99 static inline void set_value_raw(oop string, typeArrayOop buffer);
100 static inline void set_value(oop string, typeArrayOop buffer);
101 static inline void set_hash(oop string, unsigned int hash);
102
103 // Accessors
104 static inline typeArrayOop value(oop java_string);
105 static inline unsigned int hash(oop java_string);
106 static inline bool is_latin1(oop java_string);
107 static inline int length(oop java_string);
108 static int utf8_length(oop java_string);
109
110 // String converters
111 static char* as_utf8_string(oop java_string);
112 static char* as_utf8_string(oop java_string, char* buf, int buflen);
113 static char* as_utf8_string(oop java_string, int start, int len);
114 static char* as_utf8_string(oop java_string, int start, int len, char* buf, int buflen);
115 static char* as_platform_dependent_str(Handle java_string, TRAPS);
116 static jchar* as_unicode_string(oop java_string, int& length, TRAPS);
117 // produce an ascii string with all other values quoted using \u####
118 static char* as_quoted_ascii(oop java_string);
119
120 // Compute the hash value for a java.lang.String object which would
121 // contain the characters passed in.
122 //
123 // As the hash value used by the String object itself, in
124 // String.hashCode(). This value is normally calculated in Java code
125 // in the String.hashCode method(), but is precomputed for String
126 // objects in the shared archive file.
127 // hash P(31) from Kernighan & Ritchie
128 //
129 // For this reason, THIS ALGORITHM MUST MATCH String.hashCode().
130 static unsigned int hash_code(const jchar* s, int len) {
131 unsigned int h = 0;
132 while (len-- > 0) {
133 h = 31*h + (unsigned int) *s;
134 s++;
135 }
136 return h;
137 }
138
139 static unsigned int hash_code(const jbyte* s, int len) {
140 unsigned int h = 0;
141 while (len-- > 0) {
142 h = 31*h + (((unsigned int) *s) & 0xFF);
143 s++;
144 }
145 return h;
146 }
147
148 static unsigned int hash_code(oop java_string);
149
150 static bool equals(oop java_string, jchar* chars, int len);
151 static bool equals(oop str1, oop str2);
152
153 // Conversion between '.' and '/' formats
154 static Handle externalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '/', '.', THREAD); }
155 static Handle internalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '.', '/', THREAD); }
156
157 // Conversion
158 static Symbol* as_symbol(oop java_string, TRAPS);
159 static Symbol* as_symbol_or_null(oop java_string);
160
161 // Testers
162 static bool is_instance(oop obj);
163 static inline bool is_instance_inlined(oop obj);
164
165 // Debugging
166 static void print(oop java_string, outputStream* st);
167 friend class JavaClasses;
168 friend class StringTable;
169 };
170
171
172 // Interface to java.lang.Class objects
173
174 #define CLASS_INJECTED_FIELDS(macro) \
175 macro(java_lang_Class, klass, intptr_signature, false) \
176 macro(java_lang_Class, array_klass, intptr_signature, false) \
177 macro(java_lang_Class, oop_size, int_signature, false) \
178 macro(java_lang_Class, static_oop_field_count, int_signature, false) \
179 macro(java_lang_Class, protection_domain, object_signature, false) \
180 macro(java_lang_Class, signers, object_signature, false)
181
182 class java_lang_Class : AllStatic {
183 friend class VMStructs;
184 friend class JVMCIVMStructs;
185
186 private:
187 // The fake offsets are added by the class loader when java.lang.Class is loaded
188
189 static int _klass_offset;
190 static int _array_klass_offset;
191
192 static int _oop_size_offset;
193 static int _static_oop_field_count_offset;
194
195 static int _protection_domain_offset;
196 static int _init_lock_offset;
197 static int _signers_offset;
198 static int _class_loader_offset;
199 static int _module_offset;
200 static int _component_mirror_offset;
201
202 static bool offsets_computed;
203 static int classRedefinedCount_offset;
204
205 static GrowableArray<Klass*>* _fixup_mirror_list;
206 static GrowableArray<Klass*>* _fixup_module_field_list;
207
208 static void set_init_lock(oop java_class, oop init_lock);
209 static void set_protection_domain(oop java_class, oop protection_domain);
210 static void set_class_loader(oop java_class, oop class_loader);
211 static void set_component_mirror(oop java_class, oop comp_mirror);
212 static void initialize_mirror_fields(Klass* k, Handle mirror, Handle protection_domain, TRAPS);
213 static void set_mirror_module_field(Klass* K, Handle mirror, Handle module, TRAPS);
214 public:
215 static void compute_offsets();
216
217 // Instance creation
218 static void create_mirror(Klass* k, Handle class_loader, Handle module,
219 Handle protection_domain, TRAPS);
220 static void fixup_mirror(Klass* k, TRAPS);
221 static oop create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS);
222
223 static void fixup_module_field(Klass* k, Handle module);
224
225 // Conversion
226 static Klass* as_Klass(oop java_class);
227 static void set_klass(oop java_class, Klass* klass);
228 static BasicType as_BasicType(oop java_class, Klass** reference_klass = NULL);
229 static Symbol* as_signature(oop java_class, bool intern_if_not_found, TRAPS);
230 static void print_signature(oop java_class, outputStream *st);
231 static const char* as_external_name(oop java_class);
232 // Testing
233 static bool is_instance(oop obj);
234
235 static bool is_primitive(oop java_class);
236 static BasicType primitive_type(oop java_class);
237 static oop primitive_mirror(BasicType t);
238 // JVM_NewArray support
239 static Klass* array_klass(oop java_class);
240 static void release_set_array_klass(oop java_class, Klass* klass);
241 // compiler support for class operations
242 static int klass_offset_in_bytes() { return _klass_offset; }
243 static int array_klass_offset_in_bytes() { return _array_klass_offset; }
244 // Support for classRedefinedCount field
245 static int classRedefinedCount(oop the_class_mirror);
246 static void set_classRedefinedCount(oop the_class_mirror, int value);
247
248 // Support for embedded per-class oops
249 static oop protection_domain(oop java_class);
250 static oop init_lock(oop java_class);
251 static oop component_mirror(oop java_class);
252 static objArrayOop signers(oop java_class);
253 static void set_signers(oop java_class, objArrayOop signers);
254
255 static oop class_loader(oop java_class);
256 static void set_module(oop java_class, oop module);
257 static oop module(oop java_class);
258
259 static int oop_size(oop java_class);
260 static void set_oop_size(oop java_class, int size);
261 static int static_oop_field_count(oop java_class);
262 static void set_static_oop_field_count(oop java_class, int size);
263
264 static GrowableArray<Klass*>* fixup_mirror_list() {
265 return _fixup_mirror_list;
266 }
267 static void set_fixup_mirror_list(GrowableArray<Klass*>* v) {
268 _fixup_mirror_list = v;
269 }
270
271 static GrowableArray<Klass*>* fixup_module_field_list() {
272 return _fixup_module_field_list;
273 }
274 static void set_fixup_module_field_list(GrowableArray<Klass*>* v) {
275 _fixup_module_field_list = v;
276 }
277
278 // Debugging
279 friend class JavaClasses;
280 friend class InstanceKlass; // verification code accesses offsets
281 friend class ClassFileParser; // access to number_of_fake_fields
282 };
283
284 // Interface to java.lang.Thread objects
285
286 class java_lang_Thread : AllStatic {
287 private:
288 // Note that for this class the layout changed between JDK1.2 and JDK1.3,
289 // so we compute the offsets at startup rather than hard-wiring them.
290 static int _name_offset;
291 static int _group_offset;
292 static int _contextClassLoader_offset;
293 static int _inheritedAccessControlContext_offset;
294 static int _priority_offset;
295 static int _eetop_offset;
296 static int _daemon_offset;
297 static int _stillborn_offset;
298 static int _stackSize_offset;
299 static int _tid_offset;
300 static int _thread_status_offset;
301 static int _park_blocker_offset;
302 static int _park_event_offset ;
303
304 static void compute_offsets();
305
306 public:
307 // Instance creation
308 static oop create();
309 // Returns the JavaThread associated with the thread obj
310 static JavaThread* thread(oop java_thread);
311 // Set JavaThread for instance
312 static void set_thread(oop java_thread, JavaThread* thread);
313 // Name
314 static oop name(oop java_thread);
315 static void set_name(oop java_thread, oop name);
316 // Priority
317 static ThreadPriority priority(oop java_thread);
318 static void set_priority(oop java_thread, ThreadPriority priority);
319 // Thread group
320 static oop threadGroup(oop java_thread);
321 // Stillborn
322 static bool is_stillborn(oop java_thread);
323 static void set_stillborn(oop java_thread);
324 // Alive (NOTE: this is not really a field, but provides the correct
325 // definition without doing a Java call)
326 static bool is_alive(oop java_thread);
327 // Daemon
328 static bool is_daemon(oop java_thread);
329 static void set_daemon(oop java_thread);
330 // Context ClassLoader
331 static oop context_class_loader(oop java_thread);
332 // Control context
333 static oop inherited_access_control_context(oop java_thread);
334 // Stack size hint
335 static jlong stackSize(oop java_thread);
336 // Thread ID
337 static jlong thread_id(oop java_thread);
338
339 // Blocker object responsible for thread parking
340 static oop park_blocker(oop java_thread);
341
342 // Pointer to type-stable park handler, encoded as jlong.
343 // Should be set when apparently null
344 // For details, see unsafe.cpp Unsafe_Unpark
345 static jlong park_event(oop java_thread);
346 static bool set_park_event(oop java_thread, jlong ptr);
347
348 // Java Thread Status for JVMTI and M&M use.
349 // This thread status info is saved in threadStatus field of
350 // java.lang.Thread java class.
351 enum ThreadStatus {
352 NEW = 0,
353 RUNNABLE = JVMTI_THREAD_STATE_ALIVE + // runnable / running
354 JVMTI_THREAD_STATE_RUNNABLE,
355 SLEEPING = JVMTI_THREAD_STATE_ALIVE + // Thread.sleep()
356 JVMTI_THREAD_STATE_WAITING +
357 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
358 JVMTI_THREAD_STATE_SLEEPING,
359 IN_OBJECT_WAIT = JVMTI_THREAD_STATE_ALIVE + // Object.wait()
360 JVMTI_THREAD_STATE_WAITING +
361 JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
362 JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
363 IN_OBJECT_WAIT_TIMED = JVMTI_THREAD_STATE_ALIVE + // Object.wait(long)
364 JVMTI_THREAD_STATE_WAITING +
365 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
366 JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
367 PARKED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park()
368 JVMTI_THREAD_STATE_WAITING +
369 JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
370 JVMTI_THREAD_STATE_PARKED,
371 PARKED_TIMED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park(long)
372 JVMTI_THREAD_STATE_WAITING +
373 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
374 JVMTI_THREAD_STATE_PARKED,
375 BLOCKED_ON_MONITOR_ENTER = JVMTI_THREAD_STATE_ALIVE + // (re-)entering a synchronization block
376 JVMTI_THREAD_STATE_BLOCKED_ON_MONITOR_ENTER,
377 TERMINATED = JVMTI_THREAD_STATE_TERMINATED
378 };
379 // Write thread status info to threadStatus field of java.lang.Thread.
380 static void set_thread_status(oop java_thread_oop, ThreadStatus status);
381 // Read thread status info from threadStatus field of java.lang.Thread.
382 static ThreadStatus get_thread_status(oop java_thread_oop);
383
384 static const char* thread_status_name(oop java_thread_oop);
385
386 // Debugging
387 friend class JavaClasses;
388 };
389
390 // Interface to java.lang.ThreadGroup objects
391
392 class java_lang_ThreadGroup : AllStatic {
393 private:
394 static int _parent_offset;
395 static int _name_offset;
396 static int _threads_offset;
397 static int _groups_offset;
398 static int _maxPriority_offset;
399 static int _destroyed_offset;
400 static int _daemon_offset;
401 static int _nthreads_offset;
402 static int _ngroups_offset;
403
404 static void compute_offsets();
405
406 public:
407 // parent ThreadGroup
408 static oop parent(oop java_thread_group);
409 // name
410 static const char* name(oop java_thread_group);
411 // ("name as oop" accessor is not necessary)
412 // Number of threads in group
413 static int nthreads(oop java_thread_group);
414 // threads
415 static objArrayOop threads(oop java_thread_group);
416 // Number of threads in group
417 static int ngroups(oop java_thread_group);
418 // groups
419 static objArrayOop groups(oop java_thread_group);
420 // maxPriority in group
421 static ThreadPriority maxPriority(oop java_thread_group);
422 // Destroyed
423 static bool is_destroyed(oop java_thread_group);
424 // Daemon
425 static bool is_daemon(oop java_thread_group);
426 // Debugging
427 friend class JavaClasses;
428 };
429
430
431
432 // Interface to java.lang.Throwable objects
433
434 class java_lang_Throwable: AllStatic {
435 friend class BacktraceBuilder;
436 friend class BacktraceIterator;
437
438 private:
439 // Offsets
440 enum {
441 hc_backtrace_offset = 0,
442 hc_detailMessage_offset = 1,
443 hc_cause_offset = 2, // New since 1.4
444 hc_stackTrace_offset = 3 // New since 1.4
445 };
446 enum {
447 hc_static_unassigned_stacktrace_offset = 0 // New since 1.7
448 };
449 // Trace constants
450 enum {
451 trace_methods_offset = 0,
452 trace_bcis_offset = 1,
453 trace_mirrors_offset = 2,
454 trace_names_offset = 3,
455 trace_next_offset = 4,
456 trace_size = 5,
457 trace_chunk_size = 32
458 };
459
460 static int backtrace_offset;
461 static int detailMessage_offset;
462 static int stackTrace_offset;
463 static int depth_offset;
464 static int static_unassigned_stacktrace_offset;
465
466 // StackTrace (programmatic access, new since 1.4)
467 static void clear_stacktrace(oop throwable);
468 // Stacktrace (post JDK 1.7.0 to allow immutability protocol to be followed)
469 static void set_stacktrace(oop throwable, oop st_element_array);
470 static oop unassigned_stacktrace();
471
472 public:
473 // Backtrace
474 static oop backtrace(oop throwable);
475 static void set_backtrace(oop throwable, oop value);
476 static int depth(oop throwable);
477 static void set_depth(oop throwable, int value);
478 // Needed by JVMTI to filter out this internal field.
479 static int get_backtrace_offset() { return backtrace_offset;}
480 static int get_detailMessage_offset() { return detailMessage_offset;}
481 // Message
482 static oop message(oop throwable);
483 static void set_message(oop throwable, oop value);
484 static Symbol* detail_message(oop throwable);
485 static void print_stack_element(outputStream *st, const methodHandle& method, int bci);
486 static void print_stack_usage(Handle stream);
487
488 static void compute_offsets();
489
490 // Allocate space for backtrace (created but stack trace not filled in)
491 static void allocate_backtrace(Handle throwable, TRAPS);
492 // Fill in current stack trace for throwable with preallocated backtrace (no GC)
493 static void fill_in_stack_trace_of_preallocated_backtrace(Handle throwable);
494 // Fill in current stack trace, can cause GC
495 static void fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS);
496 static void fill_in_stack_trace(Handle throwable, const methodHandle& method = methodHandle());
497 // Programmatic access to stack trace
498 static void get_stack_trace_elements(Handle throwable, objArrayHandle stack_trace, TRAPS);
499 // Printing
500 static void print(oop throwable, outputStream* st);
501 static void print_stack_trace(Handle throwable, outputStream* st);
502 static void java_printStackTrace(Handle throwable, TRAPS);
503 // Debugging
504 friend class JavaClasses;
505 };
506
507
508 // Interface to java.lang.reflect.AccessibleObject objects
509
510 class java_lang_reflect_AccessibleObject: AllStatic {
511 private:
512 // Note that to reduce dependencies on the JDK we compute these
513 // offsets at run-time.
514 static int override_offset;
515
516 static void compute_offsets();
517
518 public:
519 // Accessors
520 static jboolean override(oop reflect);
521 static void set_override(oop reflect, jboolean value);
522
523 // Debugging
524 friend class JavaClasses;
525 };
526
527
528 // Interface to java.lang.reflect.Method objects
529
530 class java_lang_reflect_Method : public java_lang_reflect_AccessibleObject {
531 private:
532 // Note that to reduce dependencies on the JDK we compute these
533 // offsets at run-time.
534 static int clazz_offset;
535 static int name_offset;
536 static int returnType_offset;
537 static int parameterTypes_offset;
538 static int exceptionTypes_offset;
539 static int slot_offset;
540 static int modifiers_offset;
541 static int signature_offset;
542 static int annotations_offset;
543 static int parameter_annotations_offset;
544 static int annotation_default_offset;
545 static int type_annotations_offset;
546
547 static void compute_offsets();
548
549 public:
550 // Allocation
551 static Handle create(TRAPS);
552
553 // Accessors
554 static oop clazz(oop reflect);
555 static void set_clazz(oop reflect, oop value);
556
557 static oop name(oop method);
558 static void set_name(oop method, oop value);
559
560 static oop return_type(oop method);
561 static void set_return_type(oop method, oop value);
562
563 static oop parameter_types(oop method);
564 static void set_parameter_types(oop method, oop value);
565
566 static oop exception_types(oop method);
567 static void set_exception_types(oop method, oop value);
568
569 static int slot(oop reflect);
570 static void set_slot(oop reflect, int value);
571
572 static int modifiers(oop method);
573 static void set_modifiers(oop method, int value);
574
575 static bool has_signature_field();
576 static oop signature(oop method);
577 static void set_signature(oop method, oop value);
578
579 static bool has_annotations_field();
580 static oop annotations(oop method);
581 static void set_annotations(oop method, oop value);
582
583 static bool has_parameter_annotations_field();
584 static oop parameter_annotations(oop method);
585 static void set_parameter_annotations(oop method, oop value);
586
587 static bool has_annotation_default_field();
588 static oop annotation_default(oop method);
589 static void set_annotation_default(oop method, oop value);
590
591 static bool has_type_annotations_field();
592 static oop type_annotations(oop method);
593 static void set_type_annotations(oop method, oop value);
594
595 // Debugging
596 friend class JavaClasses;
597 };
598
599
600 // Interface to java.lang.reflect.Constructor objects
601
602 class java_lang_reflect_Constructor : public java_lang_reflect_AccessibleObject {
603 private:
604 // Note that to reduce dependencies on the JDK we compute these
605 // offsets at run-time.
606 static int clazz_offset;
607 static int parameterTypes_offset;
608 static int exceptionTypes_offset;
609 static int slot_offset;
610 static int modifiers_offset;
611 static int signature_offset;
612 static int annotations_offset;
613 static int parameter_annotations_offset;
614 static int type_annotations_offset;
615
616 static void compute_offsets();
617
618 public:
619 // Allocation
620 static Handle create(TRAPS);
621
622 // Accessors
623 static oop clazz(oop reflect);
624 static void set_clazz(oop reflect, oop value);
625
626 static oop parameter_types(oop constructor);
627 static void set_parameter_types(oop constructor, oop value);
628
629 static oop exception_types(oop constructor);
630 static void set_exception_types(oop constructor, oop value);
631
632 static int slot(oop reflect);
633 static void set_slot(oop reflect, int value);
634
635 static int modifiers(oop constructor);
636 static void set_modifiers(oop constructor, int value);
637
638 static bool has_signature_field();
639 static oop signature(oop constructor);
640 static void set_signature(oop constructor, oop value);
641
642 static bool has_annotations_field();
643 static oop annotations(oop constructor);
644 static void set_annotations(oop constructor, oop value);
645
646 static bool has_parameter_annotations_field();
647 static oop parameter_annotations(oop method);
648 static void set_parameter_annotations(oop method, oop value);
649
650 static bool has_type_annotations_field();
651 static oop type_annotations(oop constructor);
652 static void set_type_annotations(oop constructor, oop value);
653
654 // Debugging
655 friend class JavaClasses;
656 };
657
658
659 // Interface to java.lang.reflect.Field objects
660
661 class java_lang_reflect_Field : public java_lang_reflect_AccessibleObject {
662 private:
663 // Note that to reduce dependencies on the JDK we compute these
664 // offsets at run-time.
665 static int clazz_offset;
666 static int name_offset;
667 static int type_offset;
668 static int slot_offset;
669 static int modifiers_offset;
670 static int signature_offset;
671 static int annotations_offset;
672 static int type_annotations_offset;
673
674 static void compute_offsets();
675
676 public:
677 // Allocation
678 static Handle create(TRAPS);
679
680 // Accessors
681 static oop clazz(oop reflect);
682 static void set_clazz(oop reflect, oop value);
683
684 static oop name(oop field);
685 static void set_name(oop field, oop value);
686
687 static oop type(oop field);
688 static void set_type(oop field, oop value);
689
690 static int slot(oop reflect);
691 static void set_slot(oop reflect, int value);
692
693 static int modifiers(oop field);
694 static void set_modifiers(oop field, int value);
695
696 static bool has_signature_field();
697 static oop signature(oop constructor);
698 static void set_signature(oop constructor, oop value);
699
700 static bool has_annotations_field();
701 static oop annotations(oop constructor);
702 static void set_annotations(oop constructor, oop value);
703
704 static bool has_parameter_annotations_field();
705 static oop parameter_annotations(oop method);
706 static void set_parameter_annotations(oop method, oop value);
707
708 static bool has_annotation_default_field();
709 static oop annotation_default(oop method);
710 static void set_annotation_default(oop method, oop value);
711
712 static bool has_type_annotations_field();
713 static oop type_annotations(oop field);
714 static void set_type_annotations(oop field, oop value);
715
716 // Debugging
717 friend class JavaClasses;
718 };
719
720 class java_lang_reflect_Parameter {
721 private:
722 // Note that to reduce dependencies on the JDK we compute these
723 // offsets at run-time.
724 static int name_offset;
725 static int modifiers_offset;
726 static int index_offset;
727 static int executable_offset;
728
729 static void compute_offsets();
730
731 public:
732 // Allocation
733 static Handle create(TRAPS);
734
735 // Accessors
736 static oop name(oop field);
737 static void set_name(oop field, oop value);
738
739 static int index(oop reflect);
740 static void set_index(oop reflect, int value);
741
742 static int modifiers(oop reflect);
743 static void set_modifiers(oop reflect, int value);
744
745 static oop executable(oop constructor);
746 static void set_executable(oop constructor, oop value);
747
748 friend class JavaClasses;
749 };
750
751 #define MODULE_INJECTED_FIELDS(macro) \
752 macro(java_lang_Module, module_entry, intptr_signature, false)
753
754 class java_lang_Module {
755 private:
756 static int loader_offset;
757 static int name_offset;
758 static int _module_entry_offset;
759 static void compute_offsets();
760
761 public:
762 // Allocation
763 static Handle create(Handle loader, Handle module_name, TRAPS);
764
765 // Testers
766 static bool is_instance(oop obj);
767
768 // Accessors
769 static oop loader(oop module);
770 static void set_loader(oop module, oop value);
771
772 static oop name(oop module);
773 static void set_name(oop module, oop value);
774
775 static ModuleEntry* module_entry(oop module, TRAPS);
776 static void set_module_entry(oop module, ModuleEntry* module_entry);
777
778 friend class JavaClasses;
779 };
780
781 // Interface to jdk.internal.reflect.ConstantPool objects
782 class reflect_ConstantPool {
783 private:
784 // Note that to reduce dependencies on the JDK we compute these
785 // offsets at run-time.
786 static int _oop_offset;
787
788 static void compute_offsets();
789
790 public:
791 // Allocation
792 static Handle create(TRAPS);
793
794 // Accessors
795 static void set_cp(oop reflect, ConstantPool* value);
796 static int oop_offset() {
797 return _oop_offset;
798 }
799
800 static ConstantPool* get_cp(oop reflect);
801
802 // Debugging
803 friend class JavaClasses;
804 };
805
806 // Interface to jdk.internal.reflect.UnsafeStaticFieldAccessorImpl objects
807 class reflect_UnsafeStaticFieldAccessorImpl {
808 private:
809 static int _base_offset;
810 static void compute_offsets();
811
812 public:
813 static int base_offset() {
814 return _base_offset;
815 }
816
817 // Debugging
818 friend class JavaClasses;
819 };
820
821 // Interface to java.lang primitive type boxing objects:
822 // - java.lang.Boolean
823 // - java.lang.Character
824 // - java.lang.Float
825 // - java.lang.Double
826 // - java.lang.Byte
827 // - java.lang.Short
828 // - java.lang.Integer
829 // - java.lang.Long
830
831 // This could be separated out into 8 individual classes.
832
833 class java_lang_boxing_object: AllStatic {
834 private:
835 enum {
836 hc_value_offset = 0
837 };
838 static int value_offset;
839 static int long_value_offset;
840
841 static oop initialize_and_allocate(BasicType type, TRAPS);
842 public:
843 // Allocation. Returns a boxed value, or NULL for invalid type.
844 static oop create(BasicType type, jvalue* value, TRAPS);
845 // Accessors. Returns the basic type being boxed, or T_ILLEGAL for invalid oop.
846 static BasicType get_value(oop box, jvalue* value);
847 static BasicType set_value(oop box, jvalue* value);
848 static BasicType basic_type(oop box);
849 static bool is_instance(oop box) { return basic_type(box) != T_ILLEGAL; }
850 static bool is_instance(oop box, BasicType type) { return basic_type(box) == type; }
851 static void print(oop box, outputStream* st) { jvalue value; print(get_value(box, &value), &value, st); }
852 static void print(BasicType type, jvalue* value, outputStream* st);
853
854 static int value_offset_in_bytes(BasicType type) {
855 return ( type == T_LONG || type == T_DOUBLE ) ? long_value_offset :
856 value_offset;
857 }
858
859 // Debugging
860 friend class JavaClasses;
861 };
862
863
864
865 // Interface to java.lang.ref.Reference objects
866
867 class java_lang_ref_Reference: AllStatic {
868 public:
869 enum {
870 hc_referent_offset = 0,
871 hc_queue_offset = 1,
872 hc_next_offset = 2,
873 hc_discovered_offset = 3 // Is not last, see SoftRefs.
874 };
875
876 static int referent_offset;
877 static int queue_offset;
878 static int next_offset;
879 static int discovered_offset;
880 static int number_of_fake_oop_fields;
881
882 // Accessors
883 static inline oop referent(oop ref);
884 static inline void set_referent(oop ref, oop value);
885 static inline void set_referent_raw(oop ref, oop value);
886 static inline HeapWord* referent_addr(oop ref);
887 static inline oop next(oop ref);
888 static inline void set_next(oop ref, oop value);
889 static inline void set_next_raw(oop ref, oop value);
890 static inline HeapWord* next_addr(oop ref);
891 static inline oop discovered(oop ref);
892 static inline void set_discovered(oop ref, oop value);
893 static inline void set_discovered_raw(oop ref, oop value);
894 static inline HeapWord* discovered_addr(oop ref);
895 };
896
897
898 // Interface to java.lang.ref.SoftReference objects
899
900 class java_lang_ref_SoftReference: public java_lang_ref_Reference {
901 public:
902 enum {
903 // The timestamp is a long field and may need to be adjusted for alignment.
904 hc_timestamp_offset = hc_discovered_offset + 1
905 };
906 enum {
907 hc_static_clock_offset = 0
908 };
909
910 static int timestamp_offset;
911 static int static_clock_offset;
912
913 // Accessors
914 static jlong timestamp(oop ref);
915
916 // Accessors for statics
917 static jlong clock();
918 static void set_clock(jlong value);
919 };
920
921 // Interface to java.lang.invoke.MethodHandle objects
922
923 class MethodHandleEntry;
924
925 class java_lang_invoke_MethodHandle: AllStatic {
926 friend class JavaClasses;
927
928 private:
929 static int _type_offset; // the MethodType of this MH
930 static int _form_offset; // the LambdaForm of this MH
931
932 static void compute_offsets();
933
934 public:
935 // Accessors
936 static oop type(oop mh);
937 static void set_type(oop mh, oop mtype);
938
939 static oop form(oop mh);
940 static void set_form(oop mh, oop lform);
941
942 // Testers
943 static bool is_subclass(Klass* klass) {
944 return klass->is_subclass_of(SystemDictionary::MethodHandle_klass());
945 }
946 static bool is_instance(oop obj);
947
948 // Accessors for code generation:
949 static int type_offset_in_bytes() { return _type_offset; }
950 static int form_offset_in_bytes() { return _form_offset; }
951 };
952
953 // Interface to java.lang.invoke.DirectMethodHandle objects
954
955 class java_lang_invoke_DirectMethodHandle: AllStatic {
956 friend class JavaClasses;
957
958 private:
959 static int _member_offset; // the MemberName of this DMH
960
961 static void compute_offsets();
962
963 public:
964 // Accessors
965 static oop member(oop mh);
966
967 // Testers
968 static bool is_subclass(Klass* klass) {
969 return klass->is_subclass_of(SystemDictionary::DirectMethodHandle_klass());
970 }
971 static bool is_instance(oop obj);
972
973 // Accessors for code generation:
974 static int member_offset_in_bytes() { return _member_offset; }
975 };
976
977 // Interface to java.lang.invoke.LambdaForm objects
978 // (These are a private interface for managing adapter code generation.)
979
980 class java_lang_invoke_LambdaForm: AllStatic {
981 friend class JavaClasses;
982
983 private:
984 static int _vmentry_offset; // type is MemberName
985
986 static void compute_offsets();
987
988 public:
989 // Accessors
990 static oop vmentry(oop lform);
991 static void set_vmentry(oop lform, oop invoker);
992
993 // Testers
994 static bool is_subclass(Klass* klass) {
995 return SystemDictionary::LambdaForm_klass() != NULL &&
996 klass->is_subclass_of(SystemDictionary::LambdaForm_klass());
997 }
998 static bool is_instance(oop obj);
999
1000 // Accessors for code generation:
1001 static int vmentry_offset_in_bytes() { return _vmentry_offset; }
1002 };
1003
1004
1005 // Interface to java.lang.invoke.MemberName objects
1006 // (These are a private interface for Java code to query the class hierarchy.)
1007
1008 #define RESOLVEDMETHOD_INJECTED_FIELDS(macro) \
1009 macro(java_lang_invoke_ResolvedMethodName, vmholder, object_signature, false) \
1010 macro(java_lang_invoke_ResolvedMethodName, vmtarget, intptr_signature, false)
1011
1012 class java_lang_invoke_ResolvedMethodName : AllStatic {
1013 friend class JavaClasses;
1014
1015 static int _vmtarget_offset;
1016 static int _vmholder_offset;
1017
1018 static void compute_offsets();
1019 public:
1020 static int vmtarget_offset_in_bytes() { return _vmtarget_offset; }
1021
1022 static Method* vmtarget(oop resolved_method);
1023 static void set_vmtarget(oop resolved_method, Method* method);
1024
1025 // find or create resolved member name
1026 static oop find_resolved_method(const methodHandle& m, TRAPS);
1027
1028 static bool is_instance(oop resolved_method);
1029 };
1030
1031
1032 #define MEMBERNAME_INJECTED_FIELDS(macro) \
1033 macro(java_lang_invoke_MemberName, vmindex, intptr_signature, false)
1034
1035
1036 class java_lang_invoke_MemberName: AllStatic {
1037 friend class JavaClasses;
1038
1039 private:
1040 // From java.lang.invoke.MemberName:
1041 // private Class<?> clazz; // class in which the method is defined
1042 // private String name; // may be null if not yet materialized
1043 // private Object type; // may be null if not yet materialized
1044 // private int flags; // modifier bits; see reflect.Modifier
1045 // private ResolvedMethodName method; // holds VM-specific target value
1046 // private intptr_t vmindex; // member index within class or interface
1047 static int _clazz_offset;
1048 static int _name_offset;
1049 static int _type_offset;
1050 static int _flags_offset;
1051 static int _method_offset;
1052 static int _vmindex_offset;
1053
1054 static void compute_offsets();
1055
1056 public:
1057 // Accessors
1058 static oop clazz(oop mname);
1059 static void set_clazz(oop mname, oop clazz);
1060
1061 static oop type(oop mname);
1062 static void set_type(oop mname, oop type);
1063
1064 static oop name(oop mname);
1065 static void set_name(oop mname, oop name);
1066
1067 static int flags(oop mname);
1068 static void set_flags(oop mname, int flags);
1069
1070 // Link through ResolvedMethodName field to get Method*
1071 static Method* vmtarget(oop mname);
1072 static void set_method(oop mname, oop method);
1073
1074 static intptr_t vmindex(oop mname);
1075 static void set_vmindex(oop mname, intptr_t index);
1076
1077 // Testers
1078 static bool is_subclass(Klass* klass) {
1079 return klass->is_subclass_of(SystemDictionary::MemberName_klass());
1080 }
1081 static bool is_instance(oop obj);
1082
1083 static bool is_method(oop obj);
1084
1085 // Relevant integer codes (keep these in synch. with MethodHandleNatives.Constants):
1086 enum {
1087 MN_IS_METHOD = 0x00010000, // method (not constructor)
1088 MN_IS_CONSTRUCTOR = 0x00020000, // constructor
1089 MN_IS_FIELD = 0x00040000, // field
1090 MN_IS_TYPE = 0x00080000, // nested type
1091 MN_CALLER_SENSITIVE = 0x00100000, // @CallerSensitive annotation detected
1092 MN_REFERENCE_KIND_SHIFT = 24, // refKind
1093 MN_REFERENCE_KIND_MASK = 0x0F000000 >> MN_REFERENCE_KIND_SHIFT,
1094 // The SEARCH_* bits are not for MN.flags but for the matchFlags argument of MHN.getMembers:
1095 MN_SEARCH_SUPERCLASSES = 0x00100000, // walk super classes
1096 MN_SEARCH_INTERFACES = 0x00200000 // walk implemented interfaces
1097 };
1098
1099 // Accessors for code generation:
1100 static int clazz_offset_in_bytes() { return _clazz_offset; }
1101 static int type_offset_in_bytes() { return _type_offset; }
1102 static int name_offset_in_bytes() { return _name_offset; }
1103 static int flags_offset_in_bytes() { return _flags_offset; }
1104 static int method_offset_in_bytes() { return _method_offset; }
1105 static int vmindex_offset_in_bytes() { return _vmindex_offset; }
1106 };
1107
1108
1109 // Interface to java.lang.invoke.MethodType objects
1110
1111 class java_lang_invoke_MethodType: AllStatic {
1112 friend class JavaClasses;
1113
1114 private:
1115 static int _rtype_offset;
1116 static int _ptypes_offset;
1117
1118 static void compute_offsets();
1119
1120 public:
1121 // Accessors
1122 static oop rtype(oop mt);
1123 static objArrayOop ptypes(oop mt);
1124
1125 static oop ptype(oop mt, int index);
1126 static int ptype_count(oop mt);
1127
1128 static int ptype_slot_count(oop mt); // extra counts for long/double
1129 static int rtype_slot_count(oop mt); // extra counts for long/double
1130
1131 static Symbol* as_signature(oop mt, bool intern_if_not_found, TRAPS);
1132 static void print_signature(oop mt, outputStream* st);
1133
1134 static bool is_instance(oop obj);
1135
1136 static bool equals(oop mt1, oop mt2);
1137
1138 // Accessors for code generation:
1139 static int rtype_offset_in_bytes() { return _rtype_offset; }
1140 static int ptypes_offset_in_bytes() { return _ptypes_offset; }
1141 };
1142
1143
1144 // Interface to java.lang.invoke.CallSite objects
1145
1146 class java_lang_invoke_CallSite: AllStatic {
1147 friend class JavaClasses;
1148
1149 private:
1150 static int _target_offset;
1151 static int _context_offset;
1152
1153 static void compute_offsets();
1154
1155 public:
1156 // Accessors
1157 static oop target( oop site);
1158 static void set_target( oop site, oop target);
1159 static void set_target_volatile( oop site, oop target);
1160
1161 static oop context(oop site);
1162
1163 // Testers
1164 static bool is_subclass(Klass* klass) {
1165 return klass->is_subclass_of(SystemDictionary::CallSite_klass());
1166 }
1167 static bool is_instance(oop obj);
1168
1169 // Accessors for code generation:
1170 static int target_offset_in_bytes() { return _target_offset; }
1171 };
1172
1173 // Interface to java.lang.invoke.MethodHandleNatives$CallSiteContext objects
1174
1175 #define CALLSITECONTEXT_INJECTED_FIELDS(macro) \
1176 macro(java_lang_invoke_MethodHandleNatives_CallSiteContext, vmdependencies, intptr_signature, false)
1177
1178 class DependencyContext;
1179
1180 class java_lang_invoke_MethodHandleNatives_CallSiteContext : AllStatic {
1181 friend class JavaClasses;
1182
1183 private:
1184 static int _vmdependencies_offset;
1185
1186 static void compute_offsets();
1187
1188 public:
1189 // Accessors
1190 static DependencyContext vmdependencies(oop context);
1191
1192 // Testers
1193 static bool is_subclass(Klass* klass) {
1194 return klass->is_subclass_of(SystemDictionary::Context_klass());
1195 }
1196 static bool is_instance(oop obj);
1197 };
1198
1199 // Interface to java.security.AccessControlContext objects
1200
1201 class java_security_AccessControlContext: AllStatic {
1202 private:
1203 // Note that for this class the layout changed between JDK1.2 and JDK1.3,
1204 // so we compute the offsets at startup rather than hard-wiring them.
1205 static int _context_offset;
1206 static int _privilegedContext_offset;
1207 static int _isPrivileged_offset;
1208 static int _isAuthorized_offset;
1209
1210 static void compute_offsets();
1211 public:
1212 static oop create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS);
1213
1214 static bool is_authorized(Handle context);
1215
1216 // Debugging/initialization
1217 friend class JavaClasses;
1218 };
1219
1220
1221 // Interface to java.lang.ClassLoader objects
1222
1223 #define CLASSLOADER_INJECTED_FIELDS(macro) \
1224 macro(java_lang_ClassLoader, loader_data, intptr_signature, false)
1225
1226 class java_lang_ClassLoader : AllStatic {
1227 private:
1228 // The fake offsets are added by the class loader when java.lang.Class is loaded
1229 enum {
1230 hc_parent_offset = 0
1231 };
1232 static int _loader_data_offset;
1233 static bool offsets_computed;
1234 static int parent_offset;
1235 static int parallelCapable_offset;
1236 static int name_offset;
1237 static int unnamedModule_offset;
1238
1239 public:
1240 static void compute_offsets();
1241
1242 static ClassLoaderData** loader_data_addr(oop loader);
1243 static ClassLoaderData* loader_data(oop loader);
1244
1245 static oop parent(oop loader);
1246 static oop name(oop loader);
1247 static bool isAncestor(oop loader, oop cl);
1248
1249 // Support for parallelCapable field
1250 static bool parallelCapable(oop the_class_mirror);
1251
1252 static bool is_trusted_loader(oop loader);
1253
1254 // Return true if this is one of the class loaders associated with
1255 // the generated bytecodes for reflection.
1256 static bool is_reflection_class_loader(oop loader);
1257
1258 // Fix for 4474172
1259 static oop non_reflection_class_loader(oop loader);
1260
1261 // Testers
1262 static bool is_subclass(Klass* klass) {
1263 return klass->is_subclass_of(SystemDictionary::ClassLoader_klass());
1264 }
1265 static bool is_instance(oop obj);
1266
1267 static oop unnamedModule(oop loader);
1268
1269 // Debugging
1270 friend class JavaClasses;
1271 friend class ClassFileParser; // access to number_of_fake_fields
1272 };
1273
1274
1275 // Interface to java.lang.System objects
1276
1277 class java_lang_System : AllStatic {
1278 private:
1279 enum {
1280 hc_static_in_offset = 0,
1281 hc_static_out_offset = 1,
1282 hc_static_err_offset = 2,
1283 hc_static_security_offset = 3
1284 };
1285
1286 static int static_in_offset;
1287 static int static_out_offset;
1288 static int static_err_offset;
1289 static int static_security_offset;
1290
1291 public:
1292 static int in_offset_in_bytes();
1293 static int out_offset_in_bytes();
1294 static int err_offset_in_bytes();
1295
1296 static bool has_security_manager();
1297
1298 // Debugging
1299 friend class JavaClasses;
1300 };
1301
1302
1303 // Interface to java.lang.StackTraceElement objects
1304
1305 class java_lang_StackTraceElement: AllStatic {
1306 private:
1307 enum {
1308 hc_declaringClassObject_offset = 0,
1309 hc_classLoaderName_offset = 1,
1310 hc_moduleName_offset = 2,
1311 hc_moduleVersion_offset = 3,
1312 hc_declaringClass_offset = 4,
1313 hc_methodName_offset = 5,
1314 hc_fileName_offset = 6,
1315 hc_lineNumber_offset = 7
1316 };
1317
1318 static int declaringClassObject_offset;
1319 static int classLoaderName_offset;
1320 static int moduleName_offset;
1321 static int moduleVersion_offset;
1322 static int declaringClass_offset;
1323 static int methodName_offset;
1324 static int fileName_offset;
1325 static int lineNumber_offset;
1326
1327 // Setters
1328 static void set_classLoaderName(oop element, oop value);
1329 static void set_moduleName(oop element, oop value);
1330 static void set_moduleVersion(oop element, oop value);
1331 static void set_declaringClass(oop element, oop value);
1332 static void set_methodName(oop element, oop value);
1333 static void set_fileName(oop element, oop value);
1334 static void set_lineNumber(oop element, int value);
1335 static void set_declaringClassObject(oop element, oop value);
1336
1337 public:
1338 // Create an instance of StackTraceElement
1339 static oop create(const methodHandle& method, int bci, TRAPS);
1340
1341 static void fill_in(Handle element, InstanceKlass* holder, const methodHandle& method,
1342 int version, int bci, Symbol* name, TRAPS);
1343
1344 // Debugging
1345 friend class JavaClasses;
1346 };
1347
1348
1349 class Backtrace: AllStatic {
1350 public:
1351 // Helper backtrace functions to store bci|version together.
1352 static int merge_bci_and_version(int bci, int version);
1353 static int merge_mid_and_cpref(int mid, int cpref);
1354 static int bci_at(unsigned int merged);
1355 static int version_at(unsigned int merged);
1356 static int mid_at(unsigned int merged);
1357 static int cpref_at(unsigned int merged);
1358 static int get_line_number(const methodHandle& method, int bci);
1359 static Symbol* get_source_file_name(InstanceKlass* holder, int version);
1360
1361 // Debugging
1362 friend class JavaClasses;
1363 };
1364
1365 // Interface to java.lang.StackFrameInfo objects
1366
1367 #define STACKFRAMEINFO_INJECTED_FIELDS(macro) \
1368 macro(java_lang_StackFrameInfo, version, short_signature, false)
1369
1370 class java_lang_StackFrameInfo: AllStatic {
1371 private:
1372 static int _declaringClass_offset;
1373 static int _memberName_offset;
1374 static int _bci_offset;
1375 static int _version_offset;
1376
1377 static Method* get_method(Handle stackFrame, InstanceKlass* holder, TRAPS);
1378
1379 public:
1380 // Setters
1381 static void set_declaringClass(oop info, oop value);
1382 static void set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, TRAPS);
1383 static void set_bci(oop info, int value);
1384
1385 static void set_version(oop info, short value);
1386
1387 static void compute_offsets();
1388
1389 static void to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS);
1390
1391 // Debugging
1392 friend class JavaClasses;
1393 };
1394
1395 class java_lang_LiveStackFrameInfo: AllStatic {
1396 private:
1397 static int _monitors_offset;
1398 static int _locals_offset;
1399 static int _operands_offset;
1400 static int _mode_offset;
1401
1402 public:
1403 static void set_monitors(oop info, oop value);
1404 static void set_locals(oop info, oop value);
1405 static void set_operands(oop info, oop value);
1406 static void set_mode(oop info, int value);
1407
1408 static void compute_offsets();
1409
1410 // Debugging
1411 friend class JavaClasses;
1412 };
1413
1414 // Interface to java.lang.AssertionStatusDirectives objects
1415
1416 class java_lang_AssertionStatusDirectives: AllStatic {
1417 private:
1418 enum {
1419 hc_classes_offset,
1420 hc_classEnabled_offset,
1421 hc_packages_offset,
1422 hc_packageEnabled_offset,
1423 hc_deflt_offset
1424 };
1425
1426 static int classes_offset;
1427 static int classEnabled_offset;
1428 static int packages_offset;
1429 static int packageEnabled_offset;
1430 static int deflt_offset;
1431
1432 public:
1433 // Setters
1434 static void set_classes(oop obj, oop val);
1435 static void set_classEnabled(oop obj, oop val);
1436 static void set_packages(oop obj, oop val);
1437 static void set_packageEnabled(oop obj, oop val);
1438 static void set_deflt(oop obj, bool val);
1439 // Debugging
1440 friend class JavaClasses;
1441 };
1442
1443
1444 class java_nio_Buffer: AllStatic {
1445 private:
1446 static int _limit_offset;
1447
1448 public:
1449 static int limit_offset();
1450 static void compute_offsets();
1451 };
1452
1453 class java_util_concurrent_locks_AbstractOwnableSynchronizer : AllStatic {
1454 private:
1455 static int _owner_offset;
1456 public:
1457 static void initialize(TRAPS);
1458 static oop get_owner_threadObj(oop obj);
1459 };
1460
1461 // Use to declare fields that need to be injected into Java classes
1462 // for the JVM to use. The name_index and signature_index are
1463 // declared in vmSymbols. The may_be_java flag is used to declare
1464 // fields that might already exist in Java but should be injected if
1465 // they don't. Otherwise the field is unconditionally injected and
1466 // the JVM uses the injected one. This is to ensure that name
1467 // collisions don't occur. In general may_be_java should be false
1468 // unless there's a good reason.
1469
1470 class InjectedField {
1471 public:
1472 const SystemDictionary::WKID klass_id;
1473 const vmSymbols::SID name_index;
1474 const vmSymbols::SID signature_index;
1475 const bool may_be_java;
1476
1477
1478 Klass* klass() const { return SystemDictionary::well_known_klass(klass_id); }
1479 Symbol* name() const { return lookup_symbol(name_index); }
1480 Symbol* signature() const { return lookup_symbol(signature_index); }
1481
1482 int compute_offset();
1483
1484 // Find the Symbol for this index
1485 static Symbol* lookup_symbol(int symbol_index) {
1486 return vmSymbols::symbol_at((vmSymbols::SID)symbol_index);
1487 }
1488 };
1489
1490 #define DECLARE_INJECTED_FIELD_ENUM(klass, name, signature, may_be_java) \
1491 klass##_##name##_enum,
1492
1493 #define ALL_INJECTED_FIELDS(macro) \
1494 CLASS_INJECTED_FIELDS(macro) \
1495 CLASSLOADER_INJECTED_FIELDS(macro) \
1496 RESOLVEDMETHOD_INJECTED_FIELDS(macro) \
1497 MEMBERNAME_INJECTED_FIELDS(macro) \
1498 CALLSITECONTEXT_INJECTED_FIELDS(macro) \
1499 STACKFRAMEINFO_INJECTED_FIELDS(macro) \
1500 MODULE_INJECTED_FIELDS(macro)
1501
1502 // Interface to hard-coded offset checking
1503
1504 class JavaClasses : AllStatic {
1505 private:
1506
1507 static InjectedField _injected_fields[];
1508
1509 static bool check_offset(const char *klass_name, int offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1510 static bool check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1511 static bool check_constant(const char *klass_name, int constant, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1512
1513 public:
1514 enum InjectedFieldID {
1515 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD_ENUM)
1516 MAX_enum
1517 };
1518
1519 static int compute_injected_offset(InjectedFieldID id);
1520
1521 static void compute_hard_coded_offsets();
1522 static void compute_offsets();
1523 static void check_offsets() PRODUCT_RETURN;
1524
1525 static InjectedField* get_injected(Symbol* class_name, int* field_count);
1526 };
1527
1528 #undef DECLARE_INJECTED_FIELD_ENUM
1529
1530 #endif // SHARE_VM_CLASSFILE_JAVACLASSES_HPP