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