1 /*
2 * Copyright (c) 1997, 2012, 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 offset_offset;
57 static int count_offset;
58 static int hash_offset;
59
60 static bool initialized;
61
62 static Handle basic_create(int length, TRAPS);
63
64 static void set_value( oop string, typeArrayOop buffer) {
65 assert(initialized, "Must be initialized");
66 string->obj_field_put(value_offset, (oop)buffer);
67 }
68 static void set_offset(oop string, int offset) {
69 assert(initialized, "Must be initialized");
70 if (offset_offset > 0) {
71 string->int_field_put(offset_offset, offset);
72 }
73 }
74 static void set_count( oop string, int count) {
75 assert(initialized, "Must be initialized");
76 if (count_offset > 0) {
77 string->int_field_put(count_offset, count);
78 }
79 }
80
81 public:
82 static void compute_offsets();
83
84 // Instance creation
85 static Handle create_from_unicode(jchar* unicode, int len, TRAPS);
86 static oop create_oop_from_unicode(jchar* unicode, int len, TRAPS);
87 static Handle create_from_str(const char* utf8_str, TRAPS);
88 static oop create_oop_from_str(const char* utf8_str, TRAPS);
89 static Handle create_from_symbol(Symbol* symbol, TRAPS);
90 static Handle create_from_platform_dependent_str(const char* str, TRAPS);
91 static Handle char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS);
92
93 static bool has_offset_field() {
94 assert(initialized, "Must be initialized");
95 return (offset_offset > 0);
96 }
97
98 static bool has_count_field() {
99 assert(initialized, "Must be initialized");
100 return (count_offset > 0);
101 }
102
103 static bool has_hash_field() {
104 assert(initialized, "Must be initialized");
105 return (hash_offset > 0);
106 }
107
108 static int value_offset_in_bytes() {
109 assert(initialized && (value_offset > 0), "Must be initialized");
110 return value_offset;
111 }
112 static int count_offset_in_bytes() {
113 assert(initialized && (count_offset > 0), "Must be initialized");
114 return count_offset;
115 }
116 static int offset_offset_in_bytes() {
117 assert(initialized && (offset_offset > 0), "Must be initialized");
118 return offset_offset;
119 }
120 static int hash_offset_in_bytes() {
121 assert(initialized && (hash_offset > 0), "Must be initialized");
122 return hash_offset;
123 }
124
125 // Accessors
126 static typeArrayOop value(oop java_string) {
127 assert(initialized && (value_offset > 0), "Must be initialized");
128 assert(is_instance(java_string), "must be java_string");
129 return (typeArrayOop) java_string->obj_field(value_offset);
130 }
131 static int offset(oop java_string) {
132 assert(initialized, "Must be initialized");
133 assert(is_instance(java_string), "must be java_string");
134 if (offset_offset > 0) {
135 return java_string->int_field(offset_offset);
136 } else {
137 return 0;
138 }
139 }
140 static int length(oop java_string) {
141 assert(initialized, "Must be initialized");
142 assert(is_instance(java_string), "must be java_string");
143 if (count_offset > 0) {
144 return java_string->int_field(count_offset);
145 } else {
146 return ((typeArrayOop)java_string->obj_field(value_offset))->length();
147 }
148 }
149 static int utf8_length(oop java_string);
150
151 // String converters
152 static char* as_utf8_string(oop java_string);
153 static char* as_utf8_string(oop java_string, char* buf, int buflen);
154 static char* as_utf8_string(oop java_string, int start, int len);
155 static char* as_platform_dependent_str(Handle java_string, TRAPS);
156 static jchar* as_unicode_string(oop java_string, int& length);
157 // produce an ascii string with all other values quoted using \u####
158 static char* as_quoted_ascii(oop java_string);
159
160 // Compute the hash value for a java.lang.String object which would
161 // contain the characters passed in.
162 //
163 // As the hash value used by the String object itself, in
164 // String.hashCode(). This value is normally calculated in Java code
165 // in the String.hashCode method(), but is precomputed for String
166 // objects in the shared archive file.
167 // hash P(31) from Kernighan & Ritchie
168 //
169 // For this reason, THIS ALGORITHM MUST MATCH String.hashCode().
170 template <typename T> static unsigned int hash_code(T* s, int len) {
171 unsigned int h = 0;
172 while (len-- > 0) {
173 h = 31*h + (unsigned int) *s;
174 s++;
175 }
176 return h;
177 }
178 static unsigned int hash_code(oop java_string);
179
180 // This is the string hash code used by the StringTable, which may be
181 // the same as String.hashCode or an alternate hash code.
182 static unsigned int hash_string(oop java_string);
183
184 static bool equals(oop java_string, jchar* chars, int len);
185
186 // Conversion between '.' and '/' formats
187 static Handle externalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '/', '.', THREAD); }
188 static Handle internalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '.', '/', THREAD); }
189
190 // Conversion
191 static Symbol* as_symbol(Handle java_string, TRAPS);
192 static Symbol* as_symbol_or_null(oop java_string);
193
194 // Testers
195 static bool is_instance(oop obj) {
196 return obj != NULL && obj->klass() == SystemDictionary::String_klass();
197 }
198
199 // Debugging
200 static void print(Handle java_string, outputStream* st);
201 friend class JavaClasses;
202 };
203
204
205 // Interface to java.lang.Class objects
206
207 #define CLASS_INJECTED_FIELDS(macro) \
208 macro(java_lang_Class, klass, intptr_signature, false) \
209 macro(java_lang_Class, resolved_constructor, intptr_signature, false) \
210 macro(java_lang_Class, array_klass, intptr_signature, false) \
211 macro(java_lang_Class, oop_size, int_signature, false) \
212 macro(java_lang_Class, static_oop_field_count, int_signature, false)
213
214 class java_lang_Class : AllStatic {
215 friend class VMStructs;
216
217 private:
218 // The fake offsets are added by the class loader when java.lang.Class is loaded
219
220 static int _klass_offset;
221 static int _resolved_constructor_offset;
222 static int _array_klass_offset;
223
224 static int _oop_size_offset;
225 static int _static_oop_field_count_offset;
226
227 static bool offsets_computed;
228 static int classRedefinedCount_offset;
229 static GrowableArray<Klass*>* _fixup_mirror_list;
230
231 public:
232 static void compute_offsets();
233
234 // Instance creation
235 static oop create_mirror(KlassHandle k, TRAPS);
236 static void fixup_mirror(KlassHandle k, TRAPS);
237 static oop create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS);
238 // Conversion
239 static Klass* as_Klass(oop java_class);
240 static void set_klass(oop java_class, Klass* klass);
241 static BasicType as_BasicType(oop java_class, Klass** reference_klass = NULL);
242 static BasicType as_BasicType(oop java_class, KlassHandle* reference_klass) {
243 Klass* refk_oop = NULL;
244 BasicType result = as_BasicType(java_class, &refk_oop);
245 (*reference_klass) = KlassHandle(refk_oop);
246 return result;
247 }
248 static Symbol* as_signature(oop java_class, bool intern_if_not_found, TRAPS);
249 static void print_signature(oop java_class, outputStream *st);
250 // Testing
251 static bool is_instance(oop obj) {
252 return obj != NULL && obj->klass() == SystemDictionary::Class_klass();
253 }
254 static bool is_primitive(oop java_class);
255 static BasicType primitive_type(oop java_class);
256 static oop primitive_mirror(BasicType t);
257 // JVM_NewInstance support
258 static Method* resolved_constructor(oop java_class);
259 static void set_resolved_constructor(oop java_class, Method* constructor);
260 // JVM_NewArray support
261 static Klass* array_klass(oop java_class);
262 static void set_array_klass(oop java_class, Klass* klass);
263 // compiler support for class operations
264 static int klass_offset_in_bytes() { return _klass_offset; }
265 static int resolved_constructor_offset_in_bytes() { return _resolved_constructor_offset; }
266 static int array_klass_offset_in_bytes() { return _array_klass_offset; }
267 // Support for classRedefinedCount field
268 static int classRedefinedCount(oop the_class_mirror);
269 static void set_classRedefinedCount(oop the_class_mirror, int value);
270
271 static int oop_size(oop java_class);
272 static void set_oop_size(oop java_class, int size);
273 static int static_oop_field_count(oop java_class);
274 static void set_static_oop_field_count(oop java_class, int size);
275
276 static GrowableArray<Klass*>* fixup_mirror_list() {
277 return _fixup_mirror_list;
278 }
279 static void set_fixup_mirror_list(GrowableArray<Klass*>* v) {
280 _fixup_mirror_list = v;
281 }
282 // Debugging
283 friend class JavaClasses;
284 friend class InstanceKlass; // verification code accesses offsets
285 friend class ClassFileParser; // access to number_of_fake_fields
286 };
287
288 // Interface to java.lang.Thread objects
289
290 class java_lang_Thread : AllStatic {
291 private:
292 // Note that for this class the layout changed between JDK1.2 and JDK1.3,
293 // so we compute the offsets at startup rather than hard-wiring them.
294 static int _name_offset;
295 static int _group_offset;
296 static int _contextClassLoader_offset;
297 static int _inheritedAccessControlContext_offset;
298 static int _priority_offset;
299 static int _eetop_offset;
300 static int _daemon_offset;
301 static int _stillborn_offset;
302 static int _stackSize_offset;
303 static int _tid_offset;
304 static int _thread_status_offset;
305 static int _park_blocker_offset;
306 static int _park_event_offset ;
307
308 static void compute_offsets();
309
310 public:
311 // Instance creation
312 static oop create();
313 // Returns the JavaThread associated with the thread obj
314 static JavaThread* thread(oop java_thread);
315 // Set JavaThread for instance
316 static void set_thread(oop java_thread, JavaThread* thread);
317 // Name
318 static typeArrayOop name(oop java_thread);
319 static void set_name(oop java_thread, typeArrayOop name);
320 // Priority
321 static ThreadPriority priority(oop java_thread);
322 static void set_priority(oop java_thread, ThreadPriority priority);
323 // Thread group
324 static oop threadGroup(oop java_thread);
325 // Stillborn
326 static bool is_stillborn(oop java_thread);
327 static void set_stillborn(oop java_thread);
328 // Alive (NOTE: this is not really a field, but provides the correct
329 // definition without doing a Java call)
330 static bool is_alive(oop java_thread);
331 // Daemon
332 static bool is_daemon(oop java_thread);
333 static void set_daemon(oop java_thread);
334 // Context ClassLoader
335 static oop context_class_loader(oop java_thread);
336 // Control context
337 static oop inherited_access_control_context(oop java_thread);
338 // Stack size hint
339 static jlong stackSize(oop java_thread);
340 // Thread ID
341 static jlong thread_id(oop java_thread);
342
343 // Blocker object responsible for thread parking
344 static oop park_blocker(oop java_thread);
345
346 // Pointer to type-stable park handler, encoded as jlong.
347 // Should be set when apparently null
348 // For details, see unsafe.cpp Unsafe_Unpark
349 static jlong park_event(oop java_thread);
350 static bool set_park_event(oop java_thread, jlong ptr);
351
352 // Java Thread Status for JVMTI and M&M use.
353 // This thread status info is saved in threadStatus field of
354 // java.lang.Thread java class.
355 enum ThreadStatus {
356 NEW = 0,
357 RUNNABLE = JVMTI_THREAD_STATE_ALIVE + // runnable / running
358 JVMTI_THREAD_STATE_RUNNABLE,
359 SLEEPING = JVMTI_THREAD_STATE_ALIVE + // Thread.sleep()
360 JVMTI_THREAD_STATE_WAITING +
361 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
362 JVMTI_THREAD_STATE_SLEEPING,
363 IN_OBJECT_WAIT = JVMTI_THREAD_STATE_ALIVE + // Object.wait()
364 JVMTI_THREAD_STATE_WAITING +
365 JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
366 JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
367 IN_OBJECT_WAIT_TIMED = JVMTI_THREAD_STATE_ALIVE + // Object.wait(long)
368 JVMTI_THREAD_STATE_WAITING +
369 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
370 JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
371 PARKED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park()
372 JVMTI_THREAD_STATE_WAITING +
373 JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
374 JVMTI_THREAD_STATE_PARKED,
375 PARKED_TIMED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park(long)
376 JVMTI_THREAD_STATE_WAITING +
377 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
378 JVMTI_THREAD_STATE_PARKED,
379 BLOCKED_ON_MONITOR_ENTER = JVMTI_THREAD_STATE_ALIVE + // (re-)entering a synchronization block
380 JVMTI_THREAD_STATE_BLOCKED_ON_MONITOR_ENTER,
381 TERMINATED = JVMTI_THREAD_STATE_TERMINATED
382 };
383 // Write thread status info to threadStatus field of java.lang.Thread.
384 static void set_thread_status(oop java_thread_oop, ThreadStatus status);
385 // Read thread status info from threadStatus field of java.lang.Thread.
386 static ThreadStatus get_thread_status(oop java_thread_oop);
387
388 static const char* thread_status_name(oop java_thread_oop);
389
390 // Debugging
391 friend class JavaClasses;
392 };
393
394 // Interface to java.lang.ThreadGroup objects
395
396 class java_lang_ThreadGroup : AllStatic {
397 private:
398 static int _parent_offset;
399 static int _name_offset;
400 static int _threads_offset;
401 static int _groups_offset;
402 static int _maxPriority_offset;
403 static int _destroyed_offset;
404 static int _daemon_offset;
405 static int _vmAllowSuspension_offset;
406 static int _nthreads_offset;
407 static int _ngroups_offset;
408
409 static void compute_offsets();
410
411 public:
412 // parent ThreadGroup
413 static oop parent(oop java_thread_group);
414 // name
415 static typeArrayOop name(oop java_thread_group);
416 // ("name as oop" accessor is not necessary)
417 // Number of threads in group
418 static int nthreads(oop java_thread_group);
419 // threads
420 static objArrayOop threads(oop java_thread_group);
421 // Number of threads in group
422 static int ngroups(oop java_thread_group);
423 // groups
424 static objArrayOop groups(oop java_thread_group);
425 // maxPriority in group
426 static ThreadPriority maxPriority(oop java_thread_group);
427 // Destroyed
428 static bool is_destroyed(oop java_thread_group);
429 // Daemon
430 static bool is_daemon(oop java_thread_group);
431 // vmAllowSuspension
432 static bool is_vmAllowSuspension(oop java_thread_group);
433 // Debugging
434 friend class JavaClasses;
435 };
436
437
438
439 // Interface to java.lang.Throwable objects
440
441 class java_lang_Throwable: AllStatic {
442 friend class BacktraceBuilder;
443
444 private:
445 // Offsets
446 enum {
447 hc_backtrace_offset = 0,
448 hc_detailMessage_offset = 1,
449 hc_cause_offset = 2, // New since 1.4
450 hc_stackTrace_offset = 3 // New since 1.4
451 };
452 enum {
453 hc_static_unassigned_stacktrace_offset = 0 // New since 1.7
454 };
455 // Trace constants
456 enum {
457 trace_methods_offset = 0,
458 trace_bcis_offset = 1,
459 trace_mirrors_offset = 2,
460 trace_next_offset = 3,
461 trace_size = 4,
462 trace_chunk_size = 32
463 };
464
465 static int backtrace_offset;
466 static int detailMessage_offset;
467 static int cause_offset;
468 static int stackTrace_offset;
469 static int static_unassigned_stacktrace_offset;
470
471 // Printing
472 static char* print_stack_element_to_buffer(Method* method, int bci);
473 static void print_to_stream(Handle stream, const char* str);
474 // StackTrace (programmatic access, new since 1.4)
475 static void clear_stacktrace(oop throwable);
476 // No stack trace available
477 static const char* no_stack_trace_message();
478 // Stacktrace (post JDK 1.7.0 to allow immutability protocol to be followed)
479 static void set_stacktrace(oop throwable, oop st_element_array);
480 static oop unassigned_stacktrace();
481
482 public:
483 // Backtrace
484 static oop backtrace(oop throwable);
485 static void set_backtrace(oop throwable, oop value);
486 // Needed by JVMTI to filter out this internal field.
487 static int get_backtrace_offset() { return backtrace_offset;}
488 static int get_detailMessage_offset() { return detailMessage_offset;}
489 // Message
490 static oop message(oop throwable);
491 static oop message(Handle throwable);
492 static void set_message(oop throwable, oop value);
493 // Print stack trace stored in exception by call-back to Java
494 // Note: this is no longer used in Merlin, but we still suppport
495 // it for compatibility.
496 static void print_stack_trace(oop throwable, oop print_stream);
497 static void print_stack_element(Handle stream, Method* method, int bci);
498 static void print_stack_element(outputStream *st, Method* method, int bci);
499 static void print_stack_usage(Handle stream);
500
501 // Allocate space for backtrace (created but stack trace not filled in)
502 static void allocate_backtrace(Handle throwable, TRAPS);
503 // Fill in current stack trace for throwable with preallocated backtrace (no GC)
504 static void fill_in_stack_trace_of_preallocated_backtrace(Handle throwable);
505 // Fill in current stack trace, can cause GC
506 static void fill_in_stack_trace(Handle throwable, methodHandle method, TRAPS);
507 static void fill_in_stack_trace(Handle throwable, methodHandle method = methodHandle());
508 // Programmatic access to stack trace
509 static oop get_stack_trace_element(oop throwable, int index, TRAPS);
510 static int get_stack_trace_depth(oop throwable, TRAPS);
511 // Printing
512 static void print(oop throwable, outputStream* st);
513 static void print(Handle throwable, outputStream* st);
514 static void print_stack_trace(oop throwable, outputStream* st);
515 // Debugging
516 friend class JavaClasses;
517 };
518
519
520 // Interface to java.lang.reflect.AccessibleObject objects
521
522 class java_lang_reflect_AccessibleObject: AllStatic {
523 private:
524 // Note that to reduce dependencies on the JDK we compute these
525 // offsets at run-time.
526 static int override_offset;
527
528 static void compute_offsets();
529
530 public:
531 // Accessors
532 static jboolean override(oop reflect);
533 static void set_override(oop reflect, jboolean value);
534
535 // Debugging
536 friend class JavaClasses;
537 };
538
539
540 // Interface to java.lang.reflect.Method objects
541
542 class java_lang_reflect_Method : public java_lang_reflect_AccessibleObject {
543 private:
544 // Note that to reduce dependencies on the JDK we compute these
545 // offsets at run-time.
546 static int clazz_offset;
547 static int name_offset;
548 static int returnType_offset;
549 static int parameterTypes_offset;
550 static int exceptionTypes_offset;
551 static int slot_offset;
552 static int modifiers_offset;
553 static int signature_offset;
554 static int annotations_offset;
555 static int parameter_annotations_offset;
556 static int annotation_default_offset;
557 static int type_annotations_offset;
558
559 static void compute_offsets();
560
561 public:
562 // Allocation
563 static Handle create(TRAPS);
564
565 // Accessors
566 static oop clazz(oop reflect);
567 static void set_clazz(oop reflect, oop value);
568
569 static oop name(oop method);
570 static void set_name(oop method, oop value);
571
572 static oop return_type(oop method);
573 static void set_return_type(oop method, oop value);
574
575 static oop parameter_types(oop method);
576 static void set_parameter_types(oop method, oop value);
577
578 static oop exception_types(oop method);
579 static void set_exception_types(oop method, oop value);
580
581 static int slot(oop reflect);
582 static void set_slot(oop reflect, int value);
583
584 static int modifiers(oop method);
585 static void set_modifiers(oop method, int value);
586
587 static bool has_signature_field();
588 static oop signature(oop method);
589 static void set_signature(oop method, oop value);
590
591 static bool has_annotations_field();
592 static oop annotations(oop method);
593 static void set_annotations(oop method, oop value);
594
595 static bool has_parameter_annotations_field();
596 static oop parameter_annotations(oop method);
597 static void set_parameter_annotations(oop method, oop value);
598
599 static bool has_annotation_default_field();
600 static oop annotation_default(oop method);
601 static void set_annotation_default(oop method, oop value);
602
603 static bool has_type_annotations_field();
604 static oop type_annotations(oop method);
605 static void set_type_annotations(oop method, oop value);
606
607 // Debugging
608 friend class JavaClasses;
609 };
610
611
612 // Interface to java.lang.reflect.Constructor objects
613
614 class java_lang_reflect_Constructor : public java_lang_reflect_AccessibleObject {
615 private:
616 // Note that to reduce dependencies on the JDK we compute these
617 // offsets at run-time.
618 static int clazz_offset;
619 static int parameterTypes_offset;
620 static int exceptionTypes_offset;
621 static int slot_offset;
622 static int modifiers_offset;
623 static int signature_offset;
624 static int annotations_offset;
625 static int parameter_annotations_offset;
626 static int type_annotations_offset;
627
628 static void compute_offsets();
629
630 public:
631 // Allocation
632 static Handle create(TRAPS);
633
634 // Accessors
635 static oop clazz(oop reflect);
636 static void set_clazz(oop reflect, oop value);
637
638 static oop parameter_types(oop constructor);
639 static void set_parameter_types(oop constructor, oop value);
640
641 static oop exception_types(oop constructor);
642 static void set_exception_types(oop constructor, oop value);
643
644 static int slot(oop reflect);
645 static void set_slot(oop reflect, int value);
646
647 static int modifiers(oop constructor);
648 static void set_modifiers(oop constructor, int value);
649
650 static bool has_signature_field();
651 static oop signature(oop constructor);
652 static void set_signature(oop constructor, oop value);
653
654 static bool has_annotations_field();
655 static oop annotations(oop constructor);
656 static void set_annotations(oop constructor, oop value);
657
658 static bool has_parameter_annotations_field();
659 static oop parameter_annotations(oop method);
660 static void set_parameter_annotations(oop method, oop value);
661
662 static bool has_type_annotations_field();
663 static oop type_annotations(oop constructor);
664 static void set_type_annotations(oop constructor, oop value);
665
666 // Debugging
667 friend class JavaClasses;
668 };
669
670
671 // Interface to java.lang.reflect.Field objects
672
673 class java_lang_reflect_Field : public java_lang_reflect_AccessibleObject {
674 private:
675 // Note that to reduce dependencies on the JDK we compute these
676 // offsets at run-time.
677 static int clazz_offset;
678 static int name_offset;
679 static int type_offset;
680 static int slot_offset;
681 static int modifiers_offset;
682 static int signature_offset;
683 static int annotations_offset;
684 static int type_annotations_offset;
685
686 static void compute_offsets();
687
688 public:
689 // Allocation
690 static Handle create(TRAPS);
691
692 // Accessors
693 static oop clazz(oop reflect);
694 static void set_clazz(oop reflect, oop value);
695
696 static oop name(oop field);
697 static void set_name(oop field, oop value);
698
699 static oop type(oop field);
700 static void set_type(oop field, oop value);
701
702 static int slot(oop reflect);
703 static void set_slot(oop reflect, int value);
704
705 static int modifiers(oop field);
706 static void set_modifiers(oop field, int value);
707
708 static bool has_signature_field();
709 static oop signature(oop constructor);
710 static void set_signature(oop constructor, oop value);
711
712 static bool has_annotations_field();
713 static oop annotations(oop constructor);
714 static void set_annotations(oop constructor, oop value);
715
716 static bool has_parameter_annotations_field();
717 static oop parameter_annotations(oop method);
718 static void set_parameter_annotations(oop method, oop value);
719
720 static bool has_annotation_default_field();
721 static oop annotation_default(oop method);
722 static void set_annotation_default(oop method, oop value);
723
724 static bool has_type_annotations_field();
725 static oop type_annotations(oop field);
726 static void set_type_annotations(oop field, oop value);
727
728 // Debugging
729 friend class JavaClasses;
730 };
731
732 // Interface to sun.reflect.ConstantPool objects
733 class sun_reflect_ConstantPool {
734 private:
735 // Note that to reduce dependencies on the JDK we compute these
736 // offsets at run-time.
737 static int _oop_offset;
738
739 static void compute_offsets();
740
741 public:
742 // Allocation
743 static Handle create(TRAPS);
744
745 // Accessors
746 static void set_cp(oop reflect, ConstantPool* value);
747 static int oop_offset() {
748 return _oop_offset;
749 }
750
751 static ConstantPool* get_cp(oop reflect);
752
753 // Debugging
754 friend class JavaClasses;
755 };
756
757 // Interface to sun.reflect.UnsafeStaticFieldAccessorImpl objects
758 class sun_reflect_UnsafeStaticFieldAccessorImpl {
759 private:
760 static int _base_offset;
761 static void compute_offsets();
762
763 public:
764 static int base_offset() {
765 return _base_offset;
766 }
767
768 // Debugging
769 friend class JavaClasses;
770 };
771
772 // Interface to java.lang primitive type boxing objects:
773 // - java.lang.Boolean
774 // - java.lang.Character
775 // - java.lang.Float
776 // - java.lang.Double
777 // - java.lang.Byte
778 // - java.lang.Short
779 // - java.lang.Integer
780 // - java.lang.Long
781
782 // This could be separated out into 8 individual classes.
783
784 class java_lang_boxing_object: AllStatic {
785 private:
786 enum {
787 hc_value_offset = 0
788 };
789 static int value_offset;
790 static int long_value_offset;
791
792 static oop initialize_and_allocate(BasicType type, TRAPS);
793 public:
794 // Allocation. Returns a boxed value, or NULL for invalid type.
795 static oop create(BasicType type, jvalue* value, TRAPS);
796 // Accessors. Returns the basic type being boxed, or T_ILLEGAL for invalid oop.
797 static BasicType get_value(oop box, jvalue* value);
798 static BasicType set_value(oop box, jvalue* value);
799 static BasicType basic_type(oop box);
800 static bool is_instance(oop box) { return basic_type(box) != T_ILLEGAL; }
801 static bool is_instance(oop box, BasicType type) { return basic_type(box) == type; }
802 static void print(oop box, outputStream* st) { jvalue value; print(get_value(box, &value), &value, st); }
803 static void print(BasicType type, jvalue* value, outputStream* st);
804
805 static int value_offset_in_bytes(BasicType type) {
806 return ( type == T_LONG || type == T_DOUBLE ) ? long_value_offset :
807 value_offset;
808 }
809
810 // Debugging
811 friend class JavaClasses;
812 };
813
814
815
816 // Interface to java.lang.ref.Reference objects
817
818 class java_lang_ref_Reference: AllStatic {
819 public:
820 enum {
821 hc_referent_offset = 0,
822 hc_queue_offset = 1,
823 hc_next_offset = 2,
824 hc_discovered_offset = 3 // Is not last, see SoftRefs.
825 };
826 enum {
827 hc_static_lock_offset = 0,
828 hc_static_pending_offset = 1
829 };
830
831 static int referent_offset;
832 static int queue_offset;
833 static int next_offset;
834 static int discovered_offset;
835 static int static_lock_offset;
836 static int static_pending_offset;
837 static int number_of_fake_oop_fields;
838
839 // Accessors
840 static oop referent(oop ref) {
841 return ref->obj_field(referent_offset);
842 }
843 static void set_referent(oop ref, oop value) {
844 ref->obj_field_put(referent_offset, value);
845 }
846 static void set_referent_raw(oop ref, oop value) {
847 ref->obj_field_put_raw(referent_offset, value);
848 }
849 static HeapWord* referent_addr(oop ref) {
850 return ref->obj_field_addr<HeapWord>(referent_offset);
851 }
852 static oop next(oop ref) {
853 return ref->obj_field(next_offset);
854 }
855 static void set_next(oop ref, oop value) {
856 ref->obj_field_put(next_offset, value);
857 }
858 static void set_next_raw(oop ref, oop value) {
859 ref->obj_field_put_raw(next_offset, value);
860 }
861 static HeapWord* next_addr(oop ref) {
862 return ref->obj_field_addr<HeapWord>(next_offset);
863 }
864 static oop discovered(oop ref) {
865 return ref->obj_field(discovered_offset);
866 }
867 static void set_discovered(oop ref, oop value) {
868 ref->obj_field_put(discovered_offset, value);
869 }
870 static void set_discovered_raw(oop ref, oop value) {
871 ref->obj_field_put_raw(discovered_offset, value);
872 }
873 static HeapWord* discovered_addr(oop ref) {
874 return ref->obj_field_addr<HeapWord>(discovered_offset);
875 }
876 // Accessors for statics
877 static oop pending_list_lock();
878 static oop pending_list();
879
880 static HeapWord* pending_list_lock_addr();
881 static HeapWord* pending_list_addr();
882 };
883
884
885 // Interface to java.lang.ref.SoftReference objects
886
887 class java_lang_ref_SoftReference: public java_lang_ref_Reference {
888 public:
889 enum {
890 // The timestamp is a long field and may need to be adjusted for alignment.
891 hc_timestamp_offset = hc_discovered_offset + 1
892 };
893 enum {
894 hc_static_clock_offset = 0
895 };
896
897 static int timestamp_offset;
898 static int static_clock_offset;
899
900 // Accessors
901 static jlong timestamp(oop ref);
902
903 // Accessors for statics
904 static jlong clock();
905 static void set_clock(jlong value);
906 };
907
908
909 // Interface to java.lang.invoke.MethodHandle objects
910
911 class MethodHandleEntry;
912
913 class java_lang_invoke_MethodHandle: AllStatic {
914 friend class JavaClasses;
915
916 private:
917 static int _type_offset; // the MethodType of this MH
918 static int _form_offset; // the LambdaForm of this MH
919
920 static void compute_offsets();
921
922 public:
923 // Accessors
924 static oop type(oop mh);
925 static void set_type(oop mh, oop mtype);
926
927 static oop form(oop mh);
928 static void set_form(oop mh, oop lform);
929
930 // Testers
931 static bool is_subclass(Klass* klass) {
932 return klass->is_subclass_of(SystemDictionary::MethodHandle_klass());
933 }
934 static bool is_instance(oop obj) {
935 return obj != NULL && is_subclass(obj->klass());
936 }
937
938 // Accessors for code generation:
939 static int type_offset_in_bytes() { return _type_offset; }
940 static int form_offset_in_bytes() { return _form_offset; }
941 };
942
943 // Interface to java.lang.invoke.LambdaForm objects
944 // (These are a private interface for managing adapter code generation.)
945
946 class java_lang_invoke_LambdaForm: AllStatic {
947 friend class JavaClasses;
948
949 private:
950 static int _vmentry_offset; // type is MemberName
951
952 static void compute_offsets();
953
954 public:
955 // Accessors
956 static oop vmentry(oop lform);
957 static void set_vmentry(oop lform, oop invoker);
958
959 // Testers
960 static bool is_subclass(Klass* klass) {
961 return SystemDictionary::LambdaForm_klass() != NULL &&
962 klass->is_subclass_of(SystemDictionary::LambdaForm_klass());
963 }
964 static bool is_instance(oop obj) {
965 return obj != NULL && is_subclass(obj->klass());
966 }
967
968 // Accessors for code generation:
969 static int vmentry_offset_in_bytes() { return _vmentry_offset; }
970 };
971
972
973 // Interface to java.lang.invoke.MemberName objects
974 // (These are a private interface for Java code to query the class hierarchy.)
975
976 #define MEMBERNAME_INJECTED_FIELDS(macro) \
977 macro(java_lang_invoke_MemberName, vmloader, object_signature, false) \
978 macro(java_lang_invoke_MemberName, vmindex, intptr_signature, false) \
979 macro(java_lang_invoke_MemberName, vmtarget, intptr_signature, false)
980
981 class java_lang_invoke_MemberName: AllStatic {
982 friend class JavaClasses;
983
984 private:
985 // From java.lang.invoke.MemberName:
986 // private Class<?> clazz; // class in which the method is defined
987 // private String name; // may be null if not yet materialized
988 // private Object type; // may be null if not yet materialized
989 // private int flags; // modifier bits; see reflect.Modifier
990 // private intptr vmtarget; // VM-specific target value
991 // private intptr_t vmindex; // member index within class or interface
992 static int _clazz_offset;
993 static int _name_offset;
994 static int _type_offset;
995 static int _flags_offset;
996 static int _vmtarget_offset;
997 static int _vmloader_offset;
998 static int _vmindex_offset;
999
1000 static void compute_offsets();
1001
1002 public:
1003 // Accessors
1004 static oop clazz(oop mname);
1005 static void set_clazz(oop mname, oop clazz);
1006
1007 static oop type(oop mname);
1008 static void set_type(oop mname, oop type);
1009
1010 static oop name(oop mname);
1011 static void set_name(oop mname, oop name);
1012
1013 static int flags(oop mname);
1014 static void set_flags(oop mname, int flags);
1015
1016 static Metadata* vmtarget(oop mname);
1017 static void set_vmtarget(oop mname, Metadata* target);
1018
1019 static intptr_t vmindex(oop mname);
1020 static void set_vmindex(oop mname, intptr_t index);
1021
1022 // Testers
1023 static bool is_subclass(Klass* klass) {
1024 return klass->is_subclass_of(SystemDictionary::MemberName_klass());
1025 }
1026 static bool is_instance(oop obj) {
1027 return obj != NULL && is_subclass(obj->klass());
1028 }
1029
1030 // Relevant integer codes (keep these in synch. with MethodHandleNatives.Constants):
1031 enum {
1032 MN_IS_METHOD = 0x00010000, // method (not constructor)
1033 MN_IS_CONSTRUCTOR = 0x00020000, // constructor
1034 MN_IS_FIELD = 0x00040000, // field
1035 MN_IS_TYPE = 0x00080000, // nested type
1036 MN_REFERENCE_KIND_SHIFT = 24, // refKind
1037 MN_REFERENCE_KIND_MASK = 0x0F000000 >> MN_REFERENCE_KIND_SHIFT,
1038 // The SEARCH_* bits are not for MN.flags but for the matchFlags argument of MHN.getMembers:
1039 MN_SEARCH_SUPERCLASSES = 0x00100000, // walk super classes
1040 MN_SEARCH_INTERFACES = 0x00200000 // walk implemented interfaces
1041 };
1042
1043 // Accessors for code generation:
1044 static int clazz_offset_in_bytes() { return _clazz_offset; }
1045 static int type_offset_in_bytes() { return _type_offset; }
1046 static int name_offset_in_bytes() { return _name_offset; }
1047 static int flags_offset_in_bytes() { return _flags_offset; }
1048 static int vmtarget_offset_in_bytes() { return _vmtarget_offset; }
1049 static int vmindex_offset_in_bytes() { return _vmindex_offset; }
1050 };
1051
1052
1053 // Interface to java.lang.invoke.MethodType objects
1054
1055 class java_lang_invoke_MethodType: AllStatic {
1056 friend class JavaClasses;
1057
1058 private:
1059 static int _rtype_offset;
1060 static int _ptypes_offset;
1061
1062 static void compute_offsets();
1063
1064 public:
1065 // Accessors
1066 static oop rtype(oop mt);
1067 static objArrayOop ptypes(oop mt);
1068
1069 static oop ptype(oop mt, int index);
1070 static int ptype_count(oop mt);
1071
1072 static int ptype_slot_count(oop mt); // extra counts for long/double
1073 static int rtype_slot_count(oop mt); // extra counts for long/double
1074
1075 static Symbol* as_signature(oop mt, bool intern_if_not_found, TRAPS);
1076 static void print_signature(oop mt, outputStream* st);
1077
1078 static bool is_instance(oop obj) {
1079 return obj != NULL && obj->klass() == SystemDictionary::MethodType_klass();
1080 }
1081
1082 static bool equals(oop mt1, oop mt2);
1083
1084 // Accessors for code generation:
1085 static int rtype_offset_in_bytes() { return _rtype_offset; }
1086 static int ptypes_offset_in_bytes() { return _ptypes_offset; }
1087 };
1088
1089
1090 // Interface to java.lang.invoke.CallSite objects
1091
1092 class java_lang_invoke_CallSite: AllStatic {
1093 friend class JavaClasses;
1094
1095 private:
1096 static int _target_offset;
1097
1098 static void compute_offsets();
1099
1100 public:
1101 // Accessors
1102 static oop target( oop site) { return site->obj_field( _target_offset); }
1103 static void set_target( oop site, oop target) { site->obj_field_put( _target_offset, target); }
1104
1105 static volatile oop target_volatile(oop site) { return site->obj_field_volatile( _target_offset); }
1106 static void set_target_volatile(oop site, oop target) { site->obj_field_put_volatile(_target_offset, target); }
1107
1108 // Testers
1109 static bool is_subclass(Klass* klass) {
1110 return klass->is_subclass_of(SystemDictionary::CallSite_klass());
1111 }
1112 static bool is_instance(oop obj) {
1113 return obj != NULL && is_subclass(obj->klass());
1114 }
1115
1116 // Accessors for code generation:
1117 static int target_offset_in_bytes() { return _target_offset; }
1118 };
1119
1120
1121 // Interface to java.security.AccessControlContext objects
1122
1123 class java_security_AccessControlContext: AllStatic {
1124 private:
1125 // Note that for this class the layout changed between JDK1.2 and JDK1.3,
1126 // so we compute the offsets at startup rather than hard-wiring them.
1127 static int _context_offset;
1128 static int _privilegedContext_offset;
1129 static int _isPrivileged_offset;
1130
1131 static void compute_offsets();
1132 public:
1133 static oop create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS);
1134
1135 // Debugging/initialization
1136 friend class JavaClasses;
1137 };
1138
1139
1140 // Interface to java.lang.ClassLoader objects
1141
1142 #define CLASSLOADER_INJECTED_FIELDS(macro) \
1143 macro(java_lang_ClassLoader, loader_data, intptr_signature, false)
1144
1145 class java_lang_ClassLoader : AllStatic {
1146 private:
1147 // The fake offsets are added by the class loader when java.lang.Class is loaded
1148 enum {
1149 hc_parent_offset = 0
1150 };
1151 static int _loader_data_offset;
1152 static bool offsets_computed;
1153 static int parent_offset;
1154 static int parallelCapable_offset;
1155
1156 public:
1157 static void compute_offsets();
1158
1159 static ClassLoaderData** loader_data_addr(oop loader);
1160 static ClassLoaderData* loader_data(oop loader);
1161
1162 static oop parent(oop loader);
1163 static bool isAncestor(oop loader, oop cl);
1164
1165 // Support for parallelCapable field
1166 static bool parallelCapable(oop the_class_mirror);
1167
1168 static bool is_trusted_loader(oop loader);
1169
1170 // Fix for 4474172
1171 static oop non_reflection_class_loader(oop loader);
1172
1173 // Testers
1174 static bool is_subclass(Klass* klass) {
1175 return klass->is_subclass_of(SystemDictionary::ClassLoader_klass());
1176 }
1177 static bool is_instance(oop obj) {
1178 return obj != NULL && is_subclass(obj->klass());
1179 }
1180
1181 // Debugging
1182 friend class JavaClasses;
1183 friend class ClassFileParser; // access to number_of_fake_fields
1184 };
1185
1186
1187 // Interface to java.lang.System objects
1188
1189 class java_lang_System : AllStatic {
1190 private:
1191 enum {
1192 hc_static_in_offset = 0,
1193 hc_static_out_offset = 1,
1194 hc_static_err_offset = 2
1195 };
1196
1197 static int static_in_offset;
1198 static int static_out_offset;
1199 static int static_err_offset;
1200
1201 public:
1202 static int in_offset_in_bytes();
1203 static int out_offset_in_bytes();
1204 static int err_offset_in_bytes();
1205
1206 // Debugging
1207 friend class JavaClasses;
1208 };
1209
1210
1211 // Interface to java.lang.StackTraceElement objects
1212
1213 class java_lang_StackTraceElement: AllStatic {
1214 private:
1215 enum {
1216 hc_declaringClass_offset = 0,
1217 hc_methodName_offset = 1,
1218 hc_fileName_offset = 2,
1219 hc_lineNumber_offset = 3
1220 };
1221
1222 static int declaringClass_offset;
1223 static int methodName_offset;
1224 static int fileName_offset;
1225 static int lineNumber_offset;
1226
1227 public:
1228 // Setters
1229 static void set_declaringClass(oop element, oop value);
1230 static void set_methodName(oop element, oop value);
1231 static void set_fileName(oop element, oop value);
1232 static void set_lineNumber(oop element, int value);
1233
1234 // Create an instance of StackTraceElement
1235 static oop create(methodHandle m, int bci, TRAPS);
1236
1237 // Debugging
1238 friend class JavaClasses;
1239 };
1240
1241
1242 // Interface to java.lang.AssertionStatusDirectives objects
1243
1244 class java_lang_AssertionStatusDirectives: AllStatic {
1245 private:
1246 enum {
1247 hc_classes_offset,
1248 hc_classEnabled_offset,
1249 hc_packages_offset,
1250 hc_packageEnabled_offset,
1251 hc_deflt_offset
1252 };
1253
1254 static int classes_offset;
1255 static int classEnabled_offset;
1256 static int packages_offset;
1257 static int packageEnabled_offset;
1258 static int deflt_offset;
1259
1260 public:
1261 // Setters
1262 static void set_classes(oop obj, oop val);
1263 static void set_classEnabled(oop obj, oop val);
1264 static void set_packages(oop obj, oop val);
1265 static void set_packageEnabled(oop obj, oop val);
1266 static void set_deflt(oop obj, bool val);
1267 // Debugging
1268 friend class JavaClasses;
1269 };
1270
1271
1272 class java_nio_Buffer: AllStatic {
1273 private:
1274 static int _limit_offset;
1275
1276 public:
1277 static int limit_offset();
1278 static void compute_offsets();
1279 };
1280
1281 class java_util_concurrent_locks_AbstractOwnableSynchronizer : AllStatic {
1282 private:
1283 static int _owner_offset;
1284 public:
1285 static void initialize(TRAPS);
1286 static oop get_owner_threadObj(oop obj);
1287 };
1288
1289 // Use to declare fields that need to be injected into Java classes
1290 // for the JVM to use. The name_index and signature_index are
1291 // declared in vmSymbols. The may_be_java flag is used to declare
1292 // fields that might already exist in Java but should be injected if
1293 // they don't. Otherwise the field is unconditionally injected and
1294 // the JVM uses the injected one. This is to ensure that name
1295 // collisions don't occur. In general may_be_java should be false
1296 // unless there's a good reason.
1297
1298 class InjectedField {
1299 public:
1300 const SystemDictionary::WKID klass_id;
1301 const vmSymbols::SID name_index;
1302 const vmSymbols::SID signature_index;
1303 const bool may_be_java;
1304
1305
1306 Klass* klass() const { return SystemDictionary::well_known_klass(klass_id); }
1307 Symbol* name() const { return lookup_symbol(name_index); }
1308 Symbol* signature() const { return lookup_symbol(signature_index); }
1309
1310 int compute_offset();
1311
1312 // Find the Symbol for this index
1313 static Symbol* lookup_symbol(int symbol_index) {
1314 return vmSymbols::symbol_at((vmSymbols::SID)symbol_index);
1315 }
1316 };
1317
1318 #define DECLARE_INJECTED_FIELD_ENUM(klass, name, signature, may_be_java) \
1319 klass##_##name##_enum,
1320
1321 #define ALL_INJECTED_FIELDS(macro) \
1322 CLASS_INJECTED_FIELDS(macro) \
1323 CLASSLOADER_INJECTED_FIELDS(macro) \
1324 MEMBERNAME_INJECTED_FIELDS(macro)
1325
1326 // Interface to hard-coded offset checking
1327
1328 class JavaClasses : AllStatic {
1329 private:
1330
1331 static InjectedField _injected_fields[];
1332
1333 static bool check_offset(const char *klass_name, int offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1334 static bool check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1335 static bool check_constant(const char *klass_name, int constant, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1336
1337 public:
1338 enum InjectedFieldID {
1339 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD_ENUM)
1340 MAX_enum
1341 };
1342
1343 static int compute_injected_offset(InjectedFieldID id);
1344
1345 static void compute_hard_coded_offsets();
1346 static void compute_offsets();
1347 static void check_offsets() PRODUCT_RETURN;
1348
1349 static InjectedField* get_injected(Symbol* class_name, int* field_count);
1350 };
1351
1352 #undef DECLARE_INJECTED_FIELD_ENUM
1353
1354 #endif // SHARE_VM_CLASSFILE_JAVACLASSES_HPP