rev 11484 : [mq]: webrev.02
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 void set_oop_size(oop java_class, int size);
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
279 static GrowableArray<Klass*>* fixup_mirror_list() {
280 return _fixup_mirror_list;
281 }
282 static void set_fixup_mirror_list(GrowableArray<Klass*>* v) {
283 _fixup_mirror_list = v;
284 }
285
286 static GrowableArray<Klass*>* fixup_module_field_list() {
287 return _fixup_module_field_list;
288 }
289 static void set_fixup_module_field_list(GrowableArray<Klass*>* v) {
290 _fixup_module_field_list = v;
291 }
292
293 // Debugging
294 friend class JavaClasses;
295 friend class InstanceKlass; // verification code accesses offsets
296 friend class ClassFileParser; // access to number_of_fake_fields
297 };
298
299 // Interface to java.lang.Thread objects
300
301 class java_lang_Thread : AllStatic {
302 private:
303 // Note that for this class the layout changed between JDK1.2 and JDK1.3,
304 // so we compute the offsets at startup rather than hard-wiring them.
305 static int _name_offset;
306 static int _group_offset;
307 static int _contextClassLoader_offset;
308 static int _inheritedAccessControlContext_offset;
309 static int _priority_offset;
310 static int _eetop_offset;
311 static int _daemon_offset;
312 static int _stillborn_offset;
313 static int _stackSize_offset;
314 static int _tid_offset;
315 static int _thread_status_offset;
316 static int _park_blocker_offset;
317 static int _park_event_offset ;
318
319 static void compute_offsets();
320
321 public:
322 // Instance creation
323 static oop create();
324 // Returns the JavaThread associated with the thread obj
325 static JavaThread* thread(oop java_thread);
326 // Set JavaThread for instance
327 static void set_thread(oop java_thread, JavaThread* thread);
328 // Name
329 static oop name(oop java_thread);
330 static void set_name(oop java_thread, oop name);
331 // Priority
332 static ThreadPriority priority(oop java_thread);
333 static void set_priority(oop java_thread, ThreadPriority priority);
334 // Thread group
335 static oop threadGroup(oop java_thread);
336 // Stillborn
337 static bool is_stillborn(oop java_thread);
338 static void set_stillborn(oop java_thread);
339 // Alive (NOTE: this is not really a field, but provides the correct
340 // definition without doing a Java call)
341 static bool is_alive(oop java_thread);
342 // Daemon
343 static bool is_daemon(oop java_thread);
344 static void set_daemon(oop java_thread);
345 // Context ClassLoader
346 static oop context_class_loader(oop java_thread);
347 // Control context
348 static oop inherited_access_control_context(oop java_thread);
349 // Stack size hint
350 static jlong stackSize(oop java_thread);
351 // Thread ID
352 static jlong thread_id(oop java_thread);
353
354 // Blocker object responsible for thread parking
355 static oop park_blocker(oop java_thread);
356
357 // Pointer to type-stable park handler, encoded as jlong.
358 // Should be set when apparently null
359 // For details, see unsafe.cpp Unsafe_Unpark
360 static jlong park_event(oop java_thread);
361 static bool set_park_event(oop java_thread, jlong ptr);
362
363 // Java Thread Status for JVMTI and M&M use.
364 // This thread status info is saved in threadStatus field of
365 // java.lang.Thread java class.
366 enum ThreadStatus {
367 NEW = 0,
368 RUNNABLE = JVMTI_THREAD_STATE_ALIVE + // runnable / running
369 JVMTI_THREAD_STATE_RUNNABLE,
370 SLEEPING = JVMTI_THREAD_STATE_ALIVE + // Thread.sleep()
371 JVMTI_THREAD_STATE_WAITING +
372 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
373 JVMTI_THREAD_STATE_SLEEPING,
374 IN_OBJECT_WAIT = JVMTI_THREAD_STATE_ALIVE + // Object.wait()
375 JVMTI_THREAD_STATE_WAITING +
376 JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
377 JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
378 IN_OBJECT_WAIT_TIMED = JVMTI_THREAD_STATE_ALIVE + // Object.wait(long)
379 JVMTI_THREAD_STATE_WAITING +
380 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
381 JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
382 PARKED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park()
383 JVMTI_THREAD_STATE_WAITING +
384 JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
385 JVMTI_THREAD_STATE_PARKED,
386 PARKED_TIMED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park(long)
387 JVMTI_THREAD_STATE_WAITING +
388 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
389 JVMTI_THREAD_STATE_PARKED,
390 BLOCKED_ON_MONITOR_ENTER = JVMTI_THREAD_STATE_ALIVE + // (re-)entering a synchronization block
391 JVMTI_THREAD_STATE_BLOCKED_ON_MONITOR_ENTER,
392 TERMINATED = JVMTI_THREAD_STATE_TERMINATED
393 };
394 // Write thread status info to threadStatus field of java.lang.Thread.
395 static void set_thread_status(oop java_thread_oop, ThreadStatus status);
396 // Read thread status info from threadStatus field of java.lang.Thread.
397 static ThreadStatus get_thread_status(oop java_thread_oop);
398
399 static const char* thread_status_name(oop java_thread_oop);
400
401 // Debugging
402 friend class JavaClasses;
403 };
404
405 // Interface to java.lang.ThreadGroup objects
406
407 class java_lang_ThreadGroup : AllStatic {
408 private:
409 static int _parent_offset;
410 static int _name_offset;
411 static int _threads_offset;
412 static int _groups_offset;
413 static int _maxPriority_offset;
414 static int _destroyed_offset;
415 static int _daemon_offset;
416 static int _vmAllowSuspension_offset;
417 static int _nthreads_offset;
418 static int _ngroups_offset;
419
420 static void compute_offsets();
421
422 public:
423 // parent ThreadGroup
424 static oop parent(oop java_thread_group);
425 // name
426 static const char* name(oop java_thread_group);
427 // ("name as oop" accessor is not necessary)
428 // Number of threads in group
429 static int nthreads(oop java_thread_group);
430 // threads
431 static objArrayOop threads(oop java_thread_group);
432 // Number of threads in group
433 static int ngroups(oop java_thread_group);
434 // groups
435 static objArrayOop groups(oop java_thread_group);
436 // maxPriority in group
437 static ThreadPriority maxPriority(oop java_thread_group);
438 // Destroyed
439 static bool is_destroyed(oop java_thread_group);
440 // Daemon
441 static bool is_daemon(oop java_thread_group);
442 // vmAllowSuspension
443 static bool is_vmAllowSuspension(oop java_thread_group);
444 // Debugging
445 friend class JavaClasses;
446 };
447
448
449
450 // Interface to java.lang.Throwable objects
451
452 class java_lang_Throwable: AllStatic {
453 friend class BacktraceBuilder;
454 friend class BacktraceIterator;
455
456 private:
457 // Offsets
458 enum {
459 hc_backtrace_offset = 0,
460 hc_detailMessage_offset = 1,
461 hc_cause_offset = 2, // New since 1.4
462 hc_stackTrace_offset = 3 // New since 1.4
463 };
464 enum {
465 hc_static_unassigned_stacktrace_offset = 0 // New since 1.7
466 };
467 // Trace constants
468 enum {
469 trace_methods_offset = 0,
470 trace_bcis_offset = 1,
471 trace_mirrors_offset = 2,
472 trace_cprefs_offset = 3,
473 trace_next_offset = 4,
474 trace_size = 5,
475 trace_chunk_size = 32
476 };
477
478 static int backtrace_offset;
479 static int detailMessage_offset;
480 static int stackTrace_offset;
481 static int depth_offset;
482 static int static_unassigned_stacktrace_offset;
483
484 // StackTrace (programmatic access, new since 1.4)
485 static void clear_stacktrace(oop throwable);
486 // Stacktrace (post JDK 1.7.0 to allow immutability protocol to be followed)
487 static void set_stacktrace(oop throwable, oop st_element_array);
488 static oop unassigned_stacktrace();
489
490 public:
491 // Backtrace
492 static oop backtrace(oop throwable);
493 static void set_backtrace(oop throwable, oop value);
494 static int depth(oop throwable);
495 static void set_depth(oop throwable, int value);
496 // Needed by JVMTI to filter out this internal field.
497 static int get_backtrace_offset() { return backtrace_offset;}
498 static int get_detailMessage_offset() { return detailMessage_offset;}
499 // Message
500 static oop message(Handle throwable);
501 static void set_message(oop throwable, oop value);
502 static Symbol* detail_message(oop throwable);
503 static void print_stack_element(outputStream *st, const methodHandle& method, int bci);
504 static void print_stack_usage(Handle stream);
505
506 static void compute_offsets();
507
508 // Allocate space for backtrace (created but stack trace not filled in)
509 static void allocate_backtrace(Handle throwable, TRAPS);
510 // Fill in current stack trace for throwable with preallocated backtrace (no GC)
511 static void fill_in_stack_trace_of_preallocated_backtrace(Handle throwable);
512 // Fill in current stack trace, can cause GC
513 static void fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS);
514 static void fill_in_stack_trace(Handle throwable, const methodHandle& method = methodHandle());
515 // Programmatic access to stack trace
516 static void get_stack_trace_elements(Handle throwable, objArrayHandle stack_trace, TRAPS);
517 // Printing
518 static void print(Handle throwable, outputStream* st);
519 static void print_stack_trace(Handle throwable, outputStream* st);
520 static void java_printStackTrace(Handle throwable, TRAPS);
521 // Debugging
522 friend class JavaClasses;
523 };
524
525
526 // Interface to java.lang.reflect.AccessibleObject objects
527
528 class java_lang_reflect_AccessibleObject: AllStatic {
529 private:
530 // Note that to reduce dependencies on the JDK we compute these
531 // offsets at run-time.
532 static int override_offset;
533
534 static void compute_offsets();
535
536 public:
537 // Accessors
538 static jboolean override(oop reflect);
539 static void set_override(oop reflect, jboolean value);
540
541 // Debugging
542 friend class JavaClasses;
543 };
544
545
546 // Interface to java.lang.reflect.Method objects
547
548 class java_lang_reflect_Method : public java_lang_reflect_AccessibleObject {
549 private:
550 // Note that to reduce dependencies on the JDK we compute these
551 // offsets at run-time.
552 static int clazz_offset;
553 static int name_offset;
554 static int returnType_offset;
555 static int parameterTypes_offset;
556 static int exceptionTypes_offset;
557 static int slot_offset;
558 static int modifiers_offset;
559 static int signature_offset;
560 static int annotations_offset;
561 static int parameter_annotations_offset;
562 static int annotation_default_offset;
563 static int type_annotations_offset;
564
565 static void compute_offsets();
566
567 public:
568 // Allocation
569 static Handle create(TRAPS);
570
571 // Accessors
572 static oop clazz(oop reflect);
573 static void set_clazz(oop reflect, oop value);
574
575 static oop name(oop method);
576 static void set_name(oop method, oop value);
577
578 static oop return_type(oop method);
579 static void set_return_type(oop method, oop value);
580
581 static oop parameter_types(oop method);
582 static void set_parameter_types(oop method, oop value);
583
584 static oop exception_types(oop method);
585 static void set_exception_types(oop method, oop value);
586
587 static int slot(oop reflect);
588 static void set_slot(oop reflect, int value);
589
590 static int modifiers(oop method);
591 static void set_modifiers(oop method, int value);
592
593 static bool has_signature_field();
594 static oop signature(oop method);
595 static void set_signature(oop method, oop value);
596
597 static bool has_annotations_field();
598 static oop annotations(oop method);
599 static void set_annotations(oop method, oop value);
600
601 static bool has_parameter_annotations_field();
602 static oop parameter_annotations(oop method);
603 static void set_parameter_annotations(oop method, oop value);
604
605 static bool has_annotation_default_field();
606 static oop annotation_default(oop method);
607 static void set_annotation_default(oop method, oop value);
608
609 static bool has_type_annotations_field();
610 static oop type_annotations(oop method);
611 static void set_type_annotations(oop method, oop value);
612
613 // Debugging
614 friend class JavaClasses;
615 };
616
617
618 // Interface to java.lang.reflect.Constructor objects
619
620 class java_lang_reflect_Constructor : public java_lang_reflect_AccessibleObject {
621 private:
622 // Note that to reduce dependencies on the JDK we compute these
623 // offsets at run-time.
624 static int clazz_offset;
625 static int parameterTypes_offset;
626 static int exceptionTypes_offset;
627 static int slot_offset;
628 static int modifiers_offset;
629 static int signature_offset;
630 static int annotations_offset;
631 static int parameter_annotations_offset;
632 static int type_annotations_offset;
633
634 static void compute_offsets();
635
636 public:
637 // Allocation
638 static Handle create(TRAPS);
639
640 // Accessors
641 static oop clazz(oop reflect);
642 static void set_clazz(oop reflect, oop value);
643
644 static oop parameter_types(oop constructor);
645 static void set_parameter_types(oop constructor, oop value);
646
647 static oop exception_types(oop constructor);
648 static void set_exception_types(oop constructor, oop value);
649
650 static int slot(oop reflect);
651 static void set_slot(oop reflect, int value);
652
653 static int modifiers(oop constructor);
654 static void set_modifiers(oop constructor, int value);
655
656 static bool has_signature_field();
657 static oop signature(oop constructor);
658 static void set_signature(oop constructor, oop value);
659
660 static bool has_annotations_field();
661 static oop annotations(oop constructor);
662 static void set_annotations(oop constructor, oop value);
663
664 static bool has_parameter_annotations_field();
665 static oop parameter_annotations(oop method);
666 static void set_parameter_annotations(oop method, oop value);
667
668 static bool has_type_annotations_field();
669 static oop type_annotations(oop constructor);
670 static void set_type_annotations(oop constructor, oop value);
671
672 // Debugging
673 friend class JavaClasses;
674 };
675
676
677 // Interface to java.lang.reflect.Field objects
678
679 class java_lang_reflect_Field : public java_lang_reflect_AccessibleObject {
680 private:
681 // Note that to reduce dependencies on the JDK we compute these
682 // offsets at run-time.
683 static int clazz_offset;
684 static int name_offset;
685 static int type_offset;
686 static int slot_offset;
687 static int modifiers_offset;
688 static int signature_offset;
689 static int annotations_offset;
690 static int type_annotations_offset;
691
692 static void compute_offsets();
693
694 public:
695 // Allocation
696 static Handle create(TRAPS);
697
698 // Accessors
699 static oop clazz(oop reflect);
700 static void set_clazz(oop reflect, oop value);
701
702 static oop name(oop field);
703 static void set_name(oop field, oop value);
704
705 static oop type(oop field);
706 static void set_type(oop field, oop value);
707
708 static int slot(oop reflect);
709 static void set_slot(oop reflect, int value);
710
711 static int modifiers(oop field);
712 static void set_modifiers(oop field, int value);
713
714 static bool has_signature_field();
715 static oop signature(oop constructor);
716 static void set_signature(oop constructor, oop value);
717
718 static bool has_annotations_field();
719 static oop annotations(oop constructor);
720 static void set_annotations(oop constructor, oop value);
721
722 static bool has_parameter_annotations_field();
723 static oop parameter_annotations(oop method);
724 static void set_parameter_annotations(oop method, oop value);
725
726 static bool has_annotation_default_field();
727 static oop annotation_default(oop method);
728 static void set_annotation_default(oop method, oop value);
729
730 static bool has_type_annotations_field();
731 static oop type_annotations(oop field);
732 static void set_type_annotations(oop field, oop value);
733
734 // Debugging
735 friend class JavaClasses;
736 };
737
738 class java_lang_reflect_Parameter {
739 private:
740 // Note that to reduce dependencies on the JDK we compute these
741 // offsets at run-time.
742 static int name_offset;
743 static int modifiers_offset;
744 static int index_offset;
745 static int executable_offset;
746
747 static void compute_offsets();
748
749 public:
750 // Allocation
751 static Handle create(TRAPS);
752
753 // Accessors
754 static oop name(oop field);
755 static void set_name(oop field, oop value);
756
757 static int index(oop reflect);
758 static void set_index(oop reflect, int value);
759
760 static int modifiers(oop reflect);
761 static void set_modifiers(oop reflect, int value);
762
763 static oop executable(oop constructor);
764 static void set_executable(oop constructor, oop value);
765
766 friend class JavaClasses;
767 };
768
769 #define MODULE_INJECTED_FIELDS(macro) \
770 macro(java_lang_reflect_Module, module_entry, intptr_signature, false)
771
772 class java_lang_reflect_Module {
773 private:
774 static int loader_offset;
775 static int name_offset;
776 static int _module_entry_offset;
777 static void compute_offsets();
778
779 public:
780 // Allocation
781 static Handle create(Handle loader, Handle module_name, TRAPS);
782
783 // Testers
784 static bool is_subclass(Klass* klass) {
785 return klass->is_subclass_of(SystemDictionary::reflect_Module_klass());
786 }
787 static bool is_instance(oop obj);
788
789 // Accessors
790 static oop loader(oop module);
791 static void set_loader(oop module, oop value);
792
793 static oop name(oop module);
794 static void set_name(oop module, oop value);
795
796 static ModuleEntry* module_entry(oop module, TRAPS);
797 static void set_module_entry(oop module, ModuleEntry* module_entry);
798
799 friend class JavaClasses;
800 };
801
802 // Interface to jdk.internal.reflect.ConstantPool objects
803 class reflect_ConstantPool {
804 private:
805 // Note that to reduce dependencies on the JDK we compute these
806 // offsets at run-time.
807 static int _oop_offset;
808
809 static void compute_offsets();
810
811 public:
812 // Allocation
813 static Handle create(TRAPS);
814
815 // Accessors
816 static void set_cp(oop reflect, ConstantPool* value);
817 static int oop_offset() {
818 return _oop_offset;
819 }
820
821 static ConstantPool* get_cp(oop reflect);
822
823 // Debugging
824 friend class JavaClasses;
825 };
826
827 // Interface to jdk.internal.reflect.UnsafeStaticFieldAccessorImpl objects
828 class reflect_UnsafeStaticFieldAccessorImpl {
829 private:
830 static int _base_offset;
831 static void compute_offsets();
832
833 public:
834 static int base_offset() {
835 return _base_offset;
836 }
837
838 // Debugging
839 friend class JavaClasses;
840 };
841
842 // Interface to java.lang primitive type boxing objects:
843 // - java.lang.Boolean
844 // - java.lang.Character
845 // - java.lang.Float
846 // - java.lang.Double
847 // - java.lang.Byte
848 // - java.lang.Short
849 // - java.lang.Integer
850 // - java.lang.Long
851
852 // This could be separated out into 8 individual classes.
853
854 class java_lang_boxing_object: AllStatic {
855 private:
856 enum {
857 hc_value_offset = 0
858 };
859 static int value_offset;
860 static int long_value_offset;
861
862 static oop initialize_and_allocate(BasicType type, TRAPS);
863 public:
864 // Allocation. Returns a boxed value, or NULL for invalid type.
865 static oop create(BasicType type, jvalue* value, TRAPS);
866 // Accessors. Returns the basic type being boxed, or T_ILLEGAL for invalid oop.
867 static BasicType get_value(oop box, jvalue* value);
868 static BasicType set_value(oop box, jvalue* value);
869 static BasicType basic_type(oop box);
870 static bool is_instance(oop box) { return basic_type(box) != T_ILLEGAL; }
871 static bool is_instance(oop box, BasicType type) { return basic_type(box) == type; }
872 static void print(oop box, outputStream* st) { jvalue value; print(get_value(box, &value), &value, st); }
873 static void print(BasicType type, jvalue* value, outputStream* st);
874
875 static int value_offset_in_bytes(BasicType type) {
876 return ( type == T_LONG || type == T_DOUBLE ) ? long_value_offset :
877 value_offset;
878 }
879
880 // Debugging
881 friend class JavaClasses;
882 };
883
884
885
886 // Interface to java.lang.ref.Reference objects
887
888 class java_lang_ref_Reference: AllStatic {
889 public:
890 enum {
891 hc_referent_offset = 0,
892 hc_queue_offset = 1,
893 hc_next_offset = 2,
894 hc_discovered_offset = 3 // Is not last, see SoftRefs.
895 };
896 enum {
897 hc_static_lock_offset = 0,
898 hc_static_pending_offset = 1
899 };
900
901 static int referent_offset;
902 static int queue_offset;
903 static int next_offset;
904 static int discovered_offset;
905 static int static_lock_offset;
906 static int static_pending_offset;
907 static int number_of_fake_oop_fields;
908
909 // Accessors
910 static inline oop referent(oop ref);
911 static inline void set_referent(oop ref, oop value);
912 static inline void set_referent_raw(oop ref, oop value);
913 static inline HeapWord* referent_addr(oop ref);
914 static inline oop next(oop ref);
915 static inline void set_next(oop ref, oop value);
916 static inline void set_next_raw(oop ref, oop value);
917 static inline HeapWord* next_addr(oop ref);
918 static inline oop discovered(oop ref);
919 static inline void set_discovered(oop ref, oop value);
920 static inline void set_discovered_raw(oop ref, oop value);
921 static inline HeapWord* discovered_addr(oop ref);
922
923 // Accessors for statics
924 static oop pending_list_lock();
925 static oop pending_list();
926
927 static HeapWord* pending_list_lock_addr();
928 static HeapWord* pending_list_addr();
929 };
930
931
932 // Interface to java.lang.ref.SoftReference objects
933
934 class java_lang_ref_SoftReference: public java_lang_ref_Reference {
935 public:
936 enum {
937 // The timestamp is a long field and may need to be adjusted for alignment.
938 hc_timestamp_offset = hc_discovered_offset + 1
939 };
940 enum {
941 hc_static_clock_offset = 0
942 };
943
944 static int timestamp_offset;
945 static int static_clock_offset;
946
947 // Accessors
948 static jlong timestamp(oop ref);
949
950 // Accessors for statics
951 static jlong clock();
952 static void set_clock(jlong value);
953 };
954
955 // Interface to java.lang.invoke.MethodHandle objects
956
957 class MethodHandleEntry;
958
959 class java_lang_invoke_MethodHandle: AllStatic {
960 friend class JavaClasses;
961
962 private:
963 static int _type_offset; // the MethodType of this MH
964 static int _form_offset; // the LambdaForm of this MH
965
966 static void compute_offsets();
967
968 public:
969 // Accessors
970 static oop type(oop mh);
971 static void set_type(oop mh, oop mtype);
972
973 static oop form(oop mh);
974 static void set_form(oop mh, oop lform);
975
976 // Testers
977 static bool is_subclass(Klass* klass) {
978 return klass->is_subclass_of(SystemDictionary::MethodHandle_klass());
979 }
980 static bool is_instance(oop obj);
981
982 // Accessors for code generation:
983 static int type_offset_in_bytes() { return _type_offset; }
984 static int form_offset_in_bytes() { return _form_offset; }
985 };
986
987 // Interface to java.lang.invoke.DirectMethodHandle objects
988
989 class java_lang_invoke_DirectMethodHandle: AllStatic {
990 friend class JavaClasses;
991
992 private:
993 static int _member_offset; // the MemberName of this DMH
994
995 static void compute_offsets();
996
997 public:
998 // Accessors
999 static oop member(oop mh);
1000
1001 // Testers
1002 static bool is_subclass(Klass* klass) {
1003 return klass->is_subclass_of(SystemDictionary::DirectMethodHandle_klass());
1004 }
1005 static bool is_instance(oop obj);
1006
1007 // Accessors for code generation:
1008 static int member_offset_in_bytes() { return _member_offset; }
1009 };
1010
1011 // Interface to java.lang.invoke.LambdaForm objects
1012 // (These are a private interface for managing adapter code generation.)
1013
1014 class java_lang_invoke_LambdaForm: AllStatic {
1015 friend class JavaClasses;
1016
1017 private:
1018 static int _vmentry_offset; // type is MemberName
1019
1020 static void compute_offsets();
1021
1022 public:
1023 // Accessors
1024 static oop vmentry(oop lform);
1025 static void set_vmentry(oop lform, oop invoker);
1026
1027 // Testers
1028 static bool is_subclass(Klass* klass) {
1029 return SystemDictionary::LambdaForm_klass() != NULL &&
1030 klass->is_subclass_of(SystemDictionary::LambdaForm_klass());
1031 }
1032 static bool is_instance(oop obj);
1033
1034 // Accessors for code generation:
1035 static int vmentry_offset_in_bytes() { return _vmentry_offset; }
1036 };
1037
1038
1039 // Interface to java.lang.invoke.MemberName objects
1040 // (These are a private interface for Java code to query the class hierarchy.)
1041
1042 #define MEMBERNAME_INJECTED_FIELDS(macro) \
1043 macro(java_lang_invoke_MemberName, vmloader, object_signature, false) \
1044 macro(java_lang_invoke_MemberName, vmindex, intptr_signature, false) \
1045 macro(java_lang_invoke_MemberName, vmtarget, intptr_signature, false)
1046
1047 class java_lang_invoke_MemberName: AllStatic {
1048 friend class JavaClasses;
1049
1050 private:
1051 // From java.lang.invoke.MemberName:
1052 // private Class<?> clazz; // class in which the method is defined
1053 // private String name; // may be null if not yet materialized
1054 // private Object type; // may be null if not yet materialized
1055 // private int flags; // modifier bits; see reflect.Modifier
1056 // private intptr vmtarget; // VM-specific target value
1057 // private intptr_t vmindex; // member index within class or interface
1058 static int _clazz_offset;
1059 static int _name_offset;
1060 static int _type_offset;
1061 static int _flags_offset;
1062 static int _vmtarget_offset;
1063 static int _vmloader_offset;
1064 static int _vmindex_offset;
1065
1066 static void compute_offsets();
1067
1068 public:
1069 // Accessors
1070 static oop clazz(oop mname);
1071 static void set_clazz(oop mname, oop clazz);
1072
1073 static oop type(oop mname);
1074 static void set_type(oop mname, oop type);
1075
1076 static oop name(oop mname);
1077 static void set_name(oop mname, oop name);
1078
1079 static int flags(oop mname);
1080 static void set_flags(oop mname, int flags);
1081
1082 static Metadata* vmtarget(oop mname);
1083 static void set_vmtarget(oop mname, Metadata* target);
1084
1085 static intptr_t vmindex(oop mname);
1086 static void set_vmindex(oop mname, intptr_t index);
1087
1088 // Testers
1089 static bool is_subclass(Klass* klass) {
1090 return klass->is_subclass_of(SystemDictionary::MemberName_klass());
1091 }
1092 static bool is_instance(oop obj);
1093
1094 static bool is_method(oop obj);
1095
1096 // Relevant integer codes (keep these in synch. with MethodHandleNatives.Constants):
1097 enum {
1098 MN_IS_METHOD = 0x00010000, // method (not constructor)
1099 MN_IS_CONSTRUCTOR = 0x00020000, // constructor
1100 MN_IS_FIELD = 0x00040000, // field
1101 MN_IS_TYPE = 0x00080000, // nested type
1102 MN_CALLER_SENSITIVE = 0x00100000, // @CallerSensitive annotation detected
1103 MN_REFERENCE_KIND_SHIFT = 24, // refKind
1104 MN_REFERENCE_KIND_MASK = 0x0F000000 >> MN_REFERENCE_KIND_SHIFT,
1105 // The SEARCH_* bits are not for MN.flags but for the matchFlags argument of MHN.getMembers:
1106 MN_SEARCH_SUPERCLASSES = 0x00100000, // walk super classes
1107 MN_SEARCH_INTERFACES = 0x00200000 // walk implemented interfaces
1108 };
1109
1110 // Accessors for code generation:
1111 static int clazz_offset_in_bytes() { return _clazz_offset; }
1112 static int type_offset_in_bytes() { return _type_offset; }
1113 static int name_offset_in_bytes() { return _name_offset; }
1114 static int flags_offset_in_bytes() { return _flags_offset; }
1115 static int vmtarget_offset_in_bytes() { return _vmtarget_offset; }
1116 static int vmindex_offset_in_bytes() { return _vmindex_offset; }
1117
1118 static bool equals(oop mt1, oop mt2);
1119 };
1120
1121
1122 // Interface to java.lang.invoke.MethodType objects
1123
1124 class java_lang_invoke_MethodType: AllStatic {
1125 friend class JavaClasses;
1126
1127 private:
1128 static int _rtype_offset;
1129 static int _ptypes_offset;
1130
1131 static void compute_offsets();
1132
1133 public:
1134 // Accessors
1135 static oop rtype(oop mt);
1136 static objArrayOop ptypes(oop mt);
1137
1138 static oop ptype(oop mt, int index);
1139 static int ptype_count(oop mt);
1140
1141 static int ptype_slot_count(oop mt); // extra counts for long/double
1142 static int rtype_slot_count(oop mt); // extra counts for long/double
1143
1144 static Symbol* as_signature(oop mt, bool intern_if_not_found, TRAPS);
1145 static void print_signature(oop mt, outputStream* st);
1146
1147 static bool is_instance(oop obj);
1148
1149 static bool equals(oop mt1, oop mt2);
1150
1151 // Accessors for code generation:
1152 static int rtype_offset_in_bytes() { return _rtype_offset; }
1153 static int ptypes_offset_in_bytes() { return _ptypes_offset; }
1154 };
1155
1156
1157 // Interface to java.lang.invoke.CallSite objects
1158
1159 class java_lang_invoke_CallSite: AllStatic {
1160 friend class JavaClasses;
1161
1162 private:
1163 static int _target_offset;
1164 static int _context_offset;
1165
1166 static void compute_offsets();
1167
1168 public:
1169 // Accessors
1170 static oop target( oop site);
1171 static void set_target( oop site, oop target);
1172 static void set_target_volatile( oop site, oop target);
1173
1174 static oop context(oop site);
1175
1176 // Testers
1177 static bool is_subclass(Klass* klass) {
1178 return klass->is_subclass_of(SystemDictionary::CallSite_klass());
1179 }
1180 static bool is_instance(oop obj);
1181
1182 // Accessors for code generation:
1183 static int target_offset_in_bytes() { return _target_offset; }
1184 };
1185
1186 // Interface to java.lang.invoke.MethodHandleNatives$CallSiteContext objects
1187
1188 #define CALLSITECONTEXT_INJECTED_FIELDS(macro) \
1189 macro(java_lang_invoke_MethodHandleNatives_CallSiteContext, vmdependencies, intptr_signature, false)
1190
1191 class DependencyContext;
1192
1193 class java_lang_invoke_MethodHandleNatives_CallSiteContext : AllStatic {
1194 friend class JavaClasses;
1195
1196 private:
1197 static int _vmdependencies_offset;
1198
1199 static void compute_offsets();
1200
1201 public:
1202 // Accessors
1203 static DependencyContext vmdependencies(oop context);
1204
1205 // Testers
1206 static bool is_subclass(Klass* klass) {
1207 return klass->is_subclass_of(SystemDictionary::Context_klass());
1208 }
1209 static bool is_instance(oop obj);
1210 };
1211
1212 // Interface to java.security.AccessControlContext objects
1213
1214 class java_security_AccessControlContext: AllStatic {
1215 private:
1216 // Note that for this class the layout changed between JDK1.2 and JDK1.3,
1217 // so we compute the offsets at startup rather than hard-wiring them.
1218 static int _context_offset;
1219 static int _privilegedContext_offset;
1220 static int _isPrivileged_offset;
1221 static int _isAuthorized_offset;
1222
1223 static void compute_offsets();
1224 public:
1225 static oop create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS);
1226
1227 static bool is_authorized(Handle context);
1228
1229 // Debugging/initialization
1230 friend class JavaClasses;
1231 };
1232
1233
1234 // Interface to java.lang.ClassLoader objects
1235
1236 #define CLASSLOADER_INJECTED_FIELDS(macro) \
1237 macro(java_lang_ClassLoader, loader_data, intptr_signature, false)
1238
1239 class java_lang_ClassLoader : AllStatic {
1240 private:
1241 // The fake offsets are added by the class loader when java.lang.Class is loaded
1242 enum {
1243 hc_parent_offset = 0
1244 };
1245 static int _loader_data_offset;
1246 static bool offsets_computed;
1247 static int parent_offset;
1248 static int parallelCapable_offset;
1249 static int unnamedModule_offset;
1250
1251 public:
1252 static void compute_offsets();
1253
1254 static ClassLoaderData** loader_data_addr(oop loader);
1255 static ClassLoaderData* loader_data(oop loader);
1256
1257 static oop parent(oop loader);
1258 static bool isAncestor(oop loader, oop cl);
1259
1260 // Support for parallelCapable field
1261 static bool parallelCapable(oop the_class_mirror);
1262
1263 static bool is_trusted_loader(oop loader);
1264
1265 // Fix for 4474172
1266 static oop non_reflection_class_loader(oop loader);
1267
1268 // Testers
1269 static bool is_subclass(Klass* klass) {
1270 return klass->is_subclass_of(SystemDictionary::ClassLoader_klass());
1271 }
1272 static bool is_instance(oop obj);
1273
1274 static oop unnamedModule(oop loader);
1275
1276 // Debugging
1277 friend class JavaClasses;
1278 friend class ClassFileParser; // access to number_of_fake_fields
1279 };
1280
1281
1282 // Interface to java.lang.System objects
1283
1284 class java_lang_System : AllStatic {
1285 private:
1286 enum {
1287 hc_static_in_offset = 0,
1288 hc_static_out_offset = 1,
1289 hc_static_err_offset = 2,
1290 hc_static_security_offset = 3
1291 };
1292
1293 static int static_in_offset;
1294 static int static_out_offset;
1295 static int static_err_offset;
1296 static int static_security_offset;
1297
1298 public:
1299 static int in_offset_in_bytes();
1300 static int out_offset_in_bytes();
1301 static int err_offset_in_bytes();
1302
1303 static bool has_security_manager();
1304
1305 // Debugging
1306 friend class JavaClasses;
1307 };
1308
1309
1310 // Interface to java.lang.StackTraceElement objects
1311
1312 class java_lang_StackTraceElement: AllStatic {
1313 private:
1314 enum {
1315 hc_moduleName_offset = 0,
1316 hc_moduleVersion_offset = 1,
1317 hc_declaringClass_offset = 2,
1318 hc_methodName_offset = 3,
1319 hc_fileName_offset = 4,
1320 hc_lineNumber_offset = 5
1321 };
1322
1323 static int moduleName_offset;
1324 static int moduleVersion_offset;
1325 static int declaringClass_offset;
1326 static int methodName_offset;
1327 static int fileName_offset;
1328 static int lineNumber_offset;
1329
1330 // Setters
1331 static void set_moduleName(oop element, oop value);
1332 static void set_moduleVersion(oop element, oop value);
1333 static void set_declaringClass(oop element, oop value);
1334 static void set_methodName(oop element, oop value);
1335 static void set_fileName(oop element, oop value);
1336 static void set_lineNumber(oop element, int value);
1337
1338 public:
1339 // Create an instance of StackTraceElement
1340 static oop create(const methodHandle& method, int bci, TRAPS);
1341
1342 static void fill_in(Handle element, InstanceKlass* holder, const methodHandle& method,
1343 int version, int bci, int cpref, TRAPS);
1344
1345 // Debugging
1346 friend class JavaClasses;
1347 };
1348
1349
1350 class Backtrace: AllStatic {
1351 public:
1352 // Helper backtrace functions to store bci|version together.
1353 static int merge_bci_and_version(int bci, int version);
1354 static int merge_mid_and_cpref(int mid, int cpref);
1355 static int bci_at(unsigned int merged);
1356 static int version_at(unsigned int merged);
1357 static int mid_at(unsigned int merged);
1358 static int cpref_at(unsigned int merged);
1359 static int get_line_number(const methodHandle& method, int bci);
1360 static Symbol* get_source_file_name(InstanceKlass* holder, int version);
1361
1362 // Debugging
1363 friend class JavaClasses;
1364 };
1365
1366 // Interface to java.lang.StackFrameInfo objects
1367
1368 #define STACKFRAMEINFO_INJECTED_FIELDS(macro) \
1369 macro(java_lang_StackFrameInfo, version, short_signature, false)
1370
1371 class java_lang_StackFrameInfo: AllStatic {
1372 private:
1373 static int _declaringClass_offset;
1374 static int _memberName_offset;
1375 static int _bci_offset;
1376 static int _version_offset;
1377
1378 static Method* get_method(Handle stackFrame, InstanceKlass* holder, TRAPS);
1379
1380 public:
1381 // Setters
1382 static void set_declaringClass(oop info, oop value);
1383 static void set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci);
1384 static void set_bci(oop info, int value);
1385
1386 static void set_version(oop info, short value);
1387
1388 static void compute_offsets();
1389
1390 static void to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS);
1391
1392 // Debugging
1393 friend class JavaClasses;
1394 };
1395
1396 class java_lang_LiveStackFrameInfo: AllStatic {
1397 private:
1398 static int _monitors_offset;
1399 static int _locals_offset;
1400 static int _operands_offset;
1401
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
1407 static void compute_offsets();
1408
1409 // Debugging
1410 friend class JavaClasses;
1411 };
1412
1413 // Interface to java.lang.AssertionStatusDirectives objects
1414
1415 class java_lang_AssertionStatusDirectives: AllStatic {
1416 private:
1417 enum {
1418 hc_classes_offset,
1419 hc_classEnabled_offset,
1420 hc_packages_offset,
1421 hc_packageEnabled_offset,
1422 hc_deflt_offset
1423 };
1424
1425 static int classes_offset;
1426 static int classEnabled_offset;
1427 static int packages_offset;
1428 static int packageEnabled_offset;
1429 static int deflt_offset;
1430
1431 public:
1432 // Setters
1433 static void set_classes(oop obj, oop val);
1434 static void set_classEnabled(oop obj, oop val);
1435 static void set_packages(oop obj, oop val);
1436 static void set_packageEnabled(oop obj, oop val);
1437 static void set_deflt(oop obj, bool val);
1438 // Debugging
1439 friend class JavaClasses;
1440 };
1441
1442
1443 class java_nio_Buffer: AllStatic {
1444 private:
1445 static int _limit_offset;
1446
1447 public:
1448 static int limit_offset();
1449 static void compute_offsets();
1450 };
1451
1452 class java_util_concurrent_locks_AbstractOwnableSynchronizer : AllStatic {
1453 private:
1454 static int _owner_offset;
1455 public:
1456 static void initialize(TRAPS);
1457 static oop get_owner_threadObj(oop obj);
1458 };
1459
1460 // Use to declare fields that need to be injected into Java classes
1461 // for the JVM to use. The name_index and signature_index are
1462 // declared in vmSymbols. The may_be_java flag is used to declare
1463 // fields that might already exist in Java but should be injected if
1464 // they don't. Otherwise the field is unconditionally injected and
1465 // the JVM uses the injected one. This is to ensure that name
1466 // collisions don't occur. In general may_be_java should be false
1467 // unless there's a good reason.
1468
1469 class InjectedField {
1470 public:
1471 const SystemDictionary::WKID klass_id;
1472 const vmSymbols::SID name_index;
1473 const vmSymbols::SID signature_index;
1474 const bool may_be_java;
1475
1476
1477 Klass* klass() const { return SystemDictionary::well_known_klass(klass_id); }
1478 Symbol* name() const { return lookup_symbol(name_index); }
1479 Symbol* signature() const { return lookup_symbol(signature_index); }
1480
1481 int compute_offset();
1482
1483 // Find the Symbol for this index
1484 static Symbol* lookup_symbol(int symbol_index) {
1485 return vmSymbols::symbol_at((vmSymbols::SID)symbol_index);
1486 }
1487 };
1488
1489 #define DECLARE_INJECTED_FIELD_ENUM(klass, name, signature, may_be_java) \
1490 klass##_##name##_enum,
1491
1492 #define ALL_INJECTED_FIELDS(macro) \
1493 CLASS_INJECTED_FIELDS(macro) \
1494 CLASSLOADER_INJECTED_FIELDS(macro) \
1495 MEMBERNAME_INJECTED_FIELDS(macro) \
1496 CALLSITECONTEXT_INJECTED_FIELDS(macro) \
1497 STACKFRAMEINFO_INJECTED_FIELDS(macro) \
1498 MODULE_INJECTED_FIELDS(macro)
1499
1500 // Interface to hard-coded offset checking
1501
1502 class JavaClasses : AllStatic {
1503 private:
1504
1505 static InjectedField _injected_fields[];
1506
1507 static bool check_offset(const char *klass_name, int offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1508 static bool check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1509 static bool check_constant(const char *klass_name, int constant, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1510
1511 public:
1512 enum InjectedFieldID {
1513 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD_ENUM)
1514 MAX_enum
1515 };
1516
1517 static int compute_injected_offset(InjectedFieldID id);
1518
1519 static void compute_hard_coded_offsets();
1520 static void compute_offsets();
1521 static void check_offsets() PRODUCT_RETURN;
1522
1523 static InjectedField* get_injected(Symbol* class_name, int* field_count);
1524 };
1525
1526 #undef DECLARE_INJECTED_FIELD_ENUM
1527
1528 #endif // SHARE_VM_CLASSFILE_JAVACLASSES_HPP
--- EOF ---