Fri, 06 Mar 2015 16:47:46 +0100
8074561: Wrong volatile qualifier for field ClassLoaderDataGraphKlassIteratorAtomic::_next_klass
Reviewed-by: mgerdin, stefank
1 /*
2 * Copyright (c) 1997, 2015, 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
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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).
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25 #ifndef SHARE_VM_CLASSFILE_JAVACLASSES_HPP
26 #define SHARE_VM_CLASSFILE_JAVACLASSES_HPP
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"
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.
51 // Interface to java.lang.String objects
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;
60 static bool initialized;
62 static Handle basic_create(int length, TRAPS);
64 static void set_offset(oop string, int offset) {
65 assert(initialized, "Must be initialized");
66 if (offset_offset > 0) {
67 string->int_field_put(offset_offset, offset);
68 }
69 }
70 static void set_count( oop string, int count) {
71 assert(initialized, "Must be initialized");
72 if (count_offset > 0) {
73 string->int_field_put(count_offset, count);
74 }
75 }
77 public:
78 static void compute_offsets();
80 // Instance creation
81 static Handle create_from_unicode(jchar* unicode, int len, TRAPS);
82 static oop create_oop_from_unicode(jchar* unicode, int len, TRAPS);
83 static Handle create_from_str(const char* utf8_str, TRAPS);
84 static oop create_oop_from_str(const char* utf8_str, TRAPS);
85 static Handle create_from_symbol(Symbol* symbol, TRAPS);
86 static Handle create_from_platform_dependent_str(const char* str, TRAPS);
87 static Handle char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS);
89 static bool has_offset_field() {
90 assert(initialized, "Must be initialized");
91 return (offset_offset > 0);
92 }
94 static bool has_count_field() {
95 assert(initialized, "Must be initialized");
96 return (count_offset > 0);
97 }
99 static bool has_hash_field() {
100 assert(initialized, "Must be initialized");
101 return (hash_offset > 0);
102 }
104 static int value_offset_in_bytes() {
105 assert(initialized && (value_offset > 0), "Must be initialized");
106 return value_offset;
107 }
108 static int count_offset_in_bytes() {
109 assert(initialized && (count_offset > 0), "Must be initialized");
110 return count_offset;
111 }
112 static int offset_offset_in_bytes() {
113 assert(initialized && (offset_offset > 0), "Must be initialized");
114 return offset_offset;
115 }
116 static int hash_offset_in_bytes() {
117 assert(initialized && (hash_offset > 0), "Must be initialized");
118 return hash_offset;
119 }
121 static void set_value(oop string, typeArrayOop buffer) {
122 assert(initialized && (value_offset > 0), "Must be initialized");
123 string->obj_field_put(value_offset, (oop)buffer);
124 }
125 static void set_hash(oop string, unsigned int hash) {
126 assert(initialized && (hash_offset > 0), "Must be initialized");
127 string->int_field_put(hash_offset, hash);
128 }
130 // Accessors
131 static typeArrayOop value(oop java_string) {
132 assert(initialized && (value_offset > 0), "Must be initialized");
133 assert(is_instance(java_string), "must be java_string");
134 return (typeArrayOop) java_string->obj_field(value_offset);
135 }
136 static unsigned int hash(oop java_string) {
137 assert(initialized && (hash_offset > 0), "Must be initialized");
138 assert(is_instance(java_string), "must be java_string");
139 return java_string->int_field(hash_offset);
140 }
141 static int offset(oop java_string) {
142 assert(initialized, "Must be initialized");
143 assert(is_instance(java_string), "must be java_string");
144 if (offset_offset > 0) {
145 return java_string->int_field(offset_offset);
146 } else {
147 return 0;
148 }
149 }
150 static int length(oop java_string) {
151 assert(initialized, "Must be initialized");
152 assert(is_instance(java_string), "must be java_string");
153 if (count_offset > 0) {
154 return java_string->int_field(count_offset);
155 } else {
156 return ((typeArrayOop)java_string->obj_field(value_offset))->length();
157 }
158 }
159 static int utf8_length(oop java_string);
161 // String converters
162 static char* as_utf8_string(oop java_string);
163 static char* as_utf8_string(oop java_string, char* buf, int buflen);
164 static char* as_utf8_string(oop java_string, int start, int len);
165 static char* as_platform_dependent_str(Handle java_string, TRAPS);
166 static jchar* as_unicode_string(oop java_string, int& length, TRAPS);
167 // produce an ascii string with all other values quoted using \u####
168 static char* as_quoted_ascii(oop java_string);
170 // Compute the hash value for a java.lang.String object which would
171 // contain the characters passed in.
172 //
173 // As the hash value used by the String object itself, in
174 // String.hashCode(). This value is normally calculated in Java code
175 // in the String.hashCode method(), but is precomputed for String
176 // objects in the shared archive file.
177 // hash P(31) from Kernighan & Ritchie
178 //
179 // For this reason, THIS ALGORITHM MUST MATCH String.hashCode().
180 template <typename T> static unsigned int hash_code(T* s, int len) {
181 unsigned int h = 0;
182 while (len-- > 0) {
183 h = 31*h + (unsigned int) *s;
184 s++;
185 }
186 return h;
187 }
188 static unsigned int hash_code(oop java_string);
190 // This is the string hash code used by the StringTable, which may be
191 // the same as String.hashCode or an alternate hash code.
192 static unsigned int hash_string(oop java_string);
194 static bool equals(oop java_string, jchar* chars, int len);
195 static bool equals(oop str1, oop str2);
197 // Conversion between '.' and '/' formats
198 static Handle externalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '/', '.', THREAD); }
199 static Handle internalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '.', '/', THREAD); }
201 // Conversion
202 static Symbol* as_symbol(Handle java_string, TRAPS);
203 static Symbol* as_symbol_or_null(oop java_string);
205 // Testers
206 static bool is_instance(oop obj) {
207 return obj != NULL && obj->klass() == SystemDictionary::String_klass();
208 }
210 // Debugging
211 static void print(oop java_string, outputStream* st);
212 friend class JavaClasses;
213 };
216 // Interface to java.lang.Class objects
218 #define CLASS_INJECTED_FIELDS(macro) \
219 macro(java_lang_Class, klass, intptr_signature, false) \
220 macro(java_lang_Class, array_klass, intptr_signature, false) \
221 macro(java_lang_Class, oop_size, int_signature, false) \
222 macro(java_lang_Class, static_oop_field_count, int_signature, false) \
223 macro(java_lang_Class, protection_domain, object_signature, false) \
224 macro(java_lang_Class, init_lock, object_signature, false) \
225 macro(java_lang_Class, signers, object_signature, false)
227 class java_lang_Class : AllStatic {
228 friend class VMStructs;
230 private:
231 // The fake offsets are added by the class loader when java.lang.Class is loaded
233 static int _klass_offset;
234 static int _array_klass_offset;
236 static int _oop_size_offset;
237 static int _static_oop_field_count_offset;
239 static int _protection_domain_offset;
240 static int _init_lock_offset;
241 static int _signers_offset;
242 static int _class_loader_offset;
244 static bool offsets_computed;
245 static int classRedefinedCount_offset;
247 static GrowableArray<Klass*>* _fixup_mirror_list;
249 static void set_init_lock(oop java_class, oop init_lock);
250 static void set_protection_domain(oop java_class, oop protection_domain);
251 static void set_class_loader(oop java_class, oop class_loader);
252 static void initialize_mirror_fields(KlassHandle k, Handle mirror, Handle protection_domain, TRAPS);
253 public:
254 static void compute_offsets();
256 // Instance creation
257 static void create_mirror(KlassHandle k, Handle class_loader,
258 Handle protection_domain, TRAPS);
259 static void fixup_mirror(KlassHandle k, TRAPS);
260 static oop create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS);
261 // Conversion
262 static Klass* as_Klass(oop java_class);
263 static void set_klass(oop java_class, Klass* klass);
264 static BasicType as_BasicType(oop java_class, Klass** reference_klass = NULL);
265 static BasicType as_BasicType(oop java_class, KlassHandle* reference_klass) {
266 Klass* refk_oop = NULL;
267 BasicType result = as_BasicType(java_class, &refk_oop);
268 (*reference_klass) = KlassHandle(refk_oop);
269 return result;
270 }
271 static Symbol* as_signature(oop java_class, bool intern_if_not_found, TRAPS);
272 static void print_signature(oop java_class, outputStream *st);
273 // Testing
274 static bool is_instance(oop obj) {
275 return obj != NULL && obj->klass() == SystemDictionary::Class_klass();
276 }
277 static bool is_primitive(oop java_class);
278 static BasicType primitive_type(oop java_class);
279 static oop primitive_mirror(BasicType t);
280 // JVM_NewArray support
281 static Klass* array_klass(oop java_class);
282 static void set_array_klass(oop java_class, Klass* klass);
283 // compiler support for class operations
284 static int klass_offset_in_bytes() { return _klass_offset; }
285 static int array_klass_offset_in_bytes() { return _array_klass_offset; }
286 // Support for classRedefinedCount field
287 static int classRedefinedCount(oop the_class_mirror);
288 static void set_classRedefinedCount(oop the_class_mirror, int value);
290 // Support for embedded per-class oops
291 static oop protection_domain(oop java_class);
292 static oop init_lock(oop java_class);
293 static objArrayOop signers(oop java_class);
294 static void set_signers(oop java_class, objArrayOop signers);
296 static oop class_loader(oop java_class);
298 static int oop_size(oop java_class);
299 static void set_oop_size(oop java_class, int size);
300 static int static_oop_field_count(oop java_class);
301 static void set_static_oop_field_count(oop java_class, int size);
303 static GrowableArray<Klass*>* fixup_mirror_list() {
304 return _fixup_mirror_list;
305 }
306 static void set_fixup_mirror_list(GrowableArray<Klass*>* v) {
307 _fixup_mirror_list = v;
308 }
309 // Debugging
310 friend class JavaClasses;
311 friend class InstanceKlass; // verification code accesses offsets
312 friend class ClassFileParser; // access to number_of_fake_fields
313 };
315 // Interface to java.lang.Thread objects
317 class java_lang_Thread : AllStatic {
318 private:
319 // Note that for this class the layout changed between JDK1.2 and JDK1.3,
320 // so we compute the offsets at startup rather than hard-wiring them.
321 static int _name_offset;
322 static int _group_offset;
323 static int _contextClassLoader_offset;
324 static int _inheritedAccessControlContext_offset;
325 static int _priority_offset;
326 static int _eetop_offset;
327 static int _daemon_offset;
328 static int _stillborn_offset;
329 static int _stackSize_offset;
330 static int _tid_offset;
331 static int _thread_status_offset;
332 static int _park_blocker_offset;
333 static int _park_event_offset ;
335 static void compute_offsets();
337 public:
338 // Instance creation
339 static oop create();
340 // Returns the JavaThread associated with the thread obj
341 static JavaThread* thread(oop java_thread);
342 // Set JavaThread for instance
343 static void set_thread(oop java_thread, JavaThread* thread);
344 // Name
345 static typeArrayOop name(oop java_thread);
346 static void set_name(oop java_thread, typeArrayOop name);
347 // Priority
348 static ThreadPriority priority(oop java_thread);
349 static void set_priority(oop java_thread, ThreadPriority priority);
350 // Thread group
351 static oop threadGroup(oop java_thread);
352 // Stillborn
353 static bool is_stillborn(oop java_thread);
354 static void set_stillborn(oop java_thread);
355 // Alive (NOTE: this is not really a field, but provides the correct
356 // definition without doing a Java call)
357 static bool is_alive(oop java_thread);
358 // Daemon
359 static bool is_daemon(oop java_thread);
360 static void set_daemon(oop java_thread);
361 // Context ClassLoader
362 static oop context_class_loader(oop java_thread);
363 // Control context
364 static oop inherited_access_control_context(oop java_thread);
365 // Stack size hint
366 static jlong stackSize(oop java_thread);
367 // Thread ID
368 static jlong thread_id(oop java_thread);
370 // Blocker object responsible for thread parking
371 static oop park_blocker(oop java_thread);
373 // Pointer to type-stable park handler, encoded as jlong.
374 // Should be set when apparently null
375 // For details, see unsafe.cpp Unsafe_Unpark
376 static jlong park_event(oop java_thread);
377 static bool set_park_event(oop java_thread, jlong ptr);
379 // Java Thread Status for JVMTI and M&M use.
380 // This thread status info is saved in threadStatus field of
381 // java.lang.Thread java class.
382 enum ThreadStatus {
383 NEW = 0,
384 RUNNABLE = JVMTI_THREAD_STATE_ALIVE + // runnable / running
385 JVMTI_THREAD_STATE_RUNNABLE,
386 SLEEPING = JVMTI_THREAD_STATE_ALIVE + // Thread.sleep()
387 JVMTI_THREAD_STATE_WAITING +
388 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
389 JVMTI_THREAD_STATE_SLEEPING,
390 IN_OBJECT_WAIT = JVMTI_THREAD_STATE_ALIVE + // Object.wait()
391 JVMTI_THREAD_STATE_WAITING +
392 JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
393 JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
394 IN_OBJECT_WAIT_TIMED = JVMTI_THREAD_STATE_ALIVE + // Object.wait(long)
395 JVMTI_THREAD_STATE_WAITING +
396 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
397 JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
398 PARKED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park()
399 JVMTI_THREAD_STATE_WAITING +
400 JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
401 JVMTI_THREAD_STATE_PARKED,
402 PARKED_TIMED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park(long)
403 JVMTI_THREAD_STATE_WAITING +
404 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
405 JVMTI_THREAD_STATE_PARKED,
406 BLOCKED_ON_MONITOR_ENTER = JVMTI_THREAD_STATE_ALIVE + // (re-)entering a synchronization block
407 JVMTI_THREAD_STATE_BLOCKED_ON_MONITOR_ENTER,
408 TERMINATED = JVMTI_THREAD_STATE_TERMINATED
409 };
410 // Write thread status info to threadStatus field of java.lang.Thread.
411 static void set_thread_status(oop java_thread_oop, ThreadStatus status);
412 // Read thread status info from threadStatus field of java.lang.Thread.
413 static ThreadStatus get_thread_status(oop java_thread_oop);
415 static const char* thread_status_name(oop java_thread_oop);
417 // Debugging
418 friend class JavaClasses;
419 };
421 // Interface to java.lang.ThreadGroup objects
423 class java_lang_ThreadGroup : AllStatic {
424 private:
425 static int _parent_offset;
426 static int _name_offset;
427 static int _threads_offset;
428 static int _groups_offset;
429 static int _maxPriority_offset;
430 static int _destroyed_offset;
431 static int _daemon_offset;
432 static int _vmAllowSuspension_offset;
433 static int _nthreads_offset;
434 static int _ngroups_offset;
436 static void compute_offsets();
438 public:
439 // parent ThreadGroup
440 static oop parent(oop java_thread_group);
441 // name
442 static typeArrayOop name(oop java_thread_group);
443 // ("name as oop" accessor is not necessary)
444 // Number of threads in group
445 static int nthreads(oop java_thread_group);
446 // threads
447 static objArrayOop threads(oop java_thread_group);
448 // Number of threads in group
449 static int ngroups(oop java_thread_group);
450 // groups
451 static objArrayOop groups(oop java_thread_group);
452 // maxPriority in group
453 static ThreadPriority maxPriority(oop java_thread_group);
454 // Destroyed
455 static bool is_destroyed(oop java_thread_group);
456 // Daemon
457 static bool is_daemon(oop java_thread_group);
458 // vmAllowSuspension
459 static bool is_vmAllowSuspension(oop java_thread_group);
460 // Debugging
461 friend class JavaClasses;
462 };
466 // Interface to java.lang.Throwable objects
468 class java_lang_Throwable: AllStatic {
469 friend class BacktraceBuilder;
471 private:
472 // Offsets
473 enum {
474 hc_backtrace_offset = 0,
475 hc_detailMessage_offset = 1,
476 hc_cause_offset = 2, // New since 1.4
477 hc_stackTrace_offset = 3 // New since 1.4
478 };
479 enum {
480 hc_static_unassigned_stacktrace_offset = 0 // New since 1.7
481 };
482 // Trace constants
483 enum {
484 trace_methods_offset = 0,
485 trace_bcis_offset = 1,
486 trace_mirrors_offset = 2,
487 trace_cprefs_offset = 3,
488 trace_next_offset = 4,
489 trace_size = 5,
490 trace_chunk_size = 32
491 };
493 static int backtrace_offset;
494 static int detailMessage_offset;
495 static int cause_offset;
496 static int stackTrace_offset;
497 static int static_unassigned_stacktrace_offset;
499 // Printing
500 static char* print_stack_element_to_buffer(Handle mirror, int method, int version, int bci, int cpref);
501 // StackTrace (programmatic access, new since 1.4)
502 static void clear_stacktrace(oop throwable);
503 // No stack trace available
504 static const char* no_stack_trace_message();
505 // Stacktrace (post JDK 1.7.0 to allow immutability protocol to be followed)
506 static void set_stacktrace(oop throwable, oop st_element_array);
507 static oop unassigned_stacktrace();
509 public:
510 // Backtrace
511 static oop backtrace(oop throwable);
512 static void set_backtrace(oop throwable, oop value);
513 // Needed by JVMTI to filter out this internal field.
514 static int get_backtrace_offset() { return backtrace_offset;}
515 static int get_detailMessage_offset() { return detailMessage_offset;}
516 // Message
517 static oop message(oop throwable);
518 static oop message(Handle throwable);
519 static void set_message(oop throwable, oop value);
520 static void print_stack_element(outputStream *st, Handle mirror, int method,
521 int version, int bci, int cpref);
522 static void print_stack_element(outputStream *st, methodHandle method, int bci);
523 static void print_stack_usage(Handle stream);
525 // Allocate space for backtrace (created but stack trace not filled in)
526 static void allocate_backtrace(Handle throwable, TRAPS);
527 // Fill in current stack trace for throwable with preallocated backtrace (no GC)
528 static void fill_in_stack_trace_of_preallocated_backtrace(Handle throwable);
529 // Fill in current stack trace, can cause GC
530 static void fill_in_stack_trace(Handle throwable, methodHandle method, TRAPS);
531 static void fill_in_stack_trace(Handle throwable, methodHandle method = methodHandle());
532 // Programmatic access to stack trace
533 static oop get_stack_trace_element(oop throwable, int index, TRAPS);
534 static int get_stack_trace_depth(oop throwable, TRAPS);
535 // Printing
536 static void print(oop throwable, outputStream* st);
537 static void print(Handle throwable, outputStream* st);
538 static void print_stack_trace(oop throwable, outputStream* st);
539 // Debugging
540 friend class JavaClasses;
541 };
544 // Interface to java.lang.reflect.AccessibleObject objects
546 class java_lang_reflect_AccessibleObject: AllStatic {
547 private:
548 // Note that to reduce dependencies on the JDK we compute these
549 // offsets at run-time.
550 static int override_offset;
552 static void compute_offsets();
554 public:
555 // Accessors
556 static jboolean override(oop reflect);
557 static void set_override(oop reflect, jboolean value);
559 // Debugging
560 friend class JavaClasses;
561 };
564 // Interface to java.lang.reflect.Method objects
566 class java_lang_reflect_Method : public java_lang_reflect_AccessibleObject {
567 private:
568 // Note that to reduce dependencies on the JDK we compute these
569 // offsets at run-time.
570 static int clazz_offset;
571 static int name_offset;
572 static int returnType_offset;
573 static int parameterTypes_offset;
574 static int exceptionTypes_offset;
575 static int slot_offset;
576 static int modifiers_offset;
577 static int signature_offset;
578 static int annotations_offset;
579 static int parameter_annotations_offset;
580 static int annotation_default_offset;
581 static int type_annotations_offset;
583 static void compute_offsets();
585 public:
586 // Allocation
587 static Handle create(TRAPS);
589 // Accessors
590 static oop clazz(oop reflect);
591 static void set_clazz(oop reflect, oop value);
593 static oop name(oop method);
594 static void set_name(oop method, oop value);
596 static oop return_type(oop method);
597 static void set_return_type(oop method, oop value);
599 static oop parameter_types(oop method);
600 static void set_parameter_types(oop method, oop value);
602 static oop exception_types(oop method);
603 static void set_exception_types(oop method, oop value);
605 static int slot(oop reflect);
606 static void set_slot(oop reflect, int value);
608 static int modifiers(oop method);
609 static void set_modifiers(oop method, int value);
611 static bool has_signature_field();
612 static oop signature(oop method);
613 static void set_signature(oop method, oop value);
615 static bool has_annotations_field();
616 static oop annotations(oop method);
617 static void set_annotations(oop method, oop value);
619 static bool has_parameter_annotations_field();
620 static oop parameter_annotations(oop method);
621 static void set_parameter_annotations(oop method, oop value);
623 static bool has_annotation_default_field();
624 static oop annotation_default(oop method);
625 static void set_annotation_default(oop method, oop value);
627 static bool has_type_annotations_field();
628 static oop type_annotations(oop method);
629 static void set_type_annotations(oop method, oop value);
631 // Debugging
632 friend class JavaClasses;
633 };
636 // Interface to java.lang.reflect.Constructor objects
638 class java_lang_reflect_Constructor : public java_lang_reflect_AccessibleObject {
639 private:
640 // Note that to reduce dependencies on the JDK we compute these
641 // offsets at run-time.
642 static int clazz_offset;
643 static int parameterTypes_offset;
644 static int exceptionTypes_offset;
645 static int slot_offset;
646 static int modifiers_offset;
647 static int signature_offset;
648 static int annotations_offset;
649 static int parameter_annotations_offset;
650 static int type_annotations_offset;
652 static void compute_offsets();
654 public:
655 // Allocation
656 static Handle create(TRAPS);
658 // Accessors
659 static oop clazz(oop reflect);
660 static void set_clazz(oop reflect, oop value);
662 static oop parameter_types(oop constructor);
663 static void set_parameter_types(oop constructor, oop value);
665 static oop exception_types(oop constructor);
666 static void set_exception_types(oop constructor, oop value);
668 static int slot(oop reflect);
669 static void set_slot(oop reflect, int value);
671 static int modifiers(oop constructor);
672 static void set_modifiers(oop constructor, int value);
674 static bool has_signature_field();
675 static oop signature(oop constructor);
676 static void set_signature(oop constructor, oop value);
678 static bool has_annotations_field();
679 static oop annotations(oop constructor);
680 static void set_annotations(oop constructor, oop value);
682 static bool has_parameter_annotations_field();
683 static oop parameter_annotations(oop method);
684 static void set_parameter_annotations(oop method, oop value);
686 static bool has_type_annotations_field();
687 static oop type_annotations(oop constructor);
688 static void set_type_annotations(oop constructor, oop value);
690 // Debugging
691 friend class JavaClasses;
692 };
695 // Interface to java.lang.reflect.Field objects
697 class java_lang_reflect_Field : public java_lang_reflect_AccessibleObject {
698 private:
699 // Note that to reduce dependencies on the JDK we compute these
700 // offsets at run-time.
701 static int clazz_offset;
702 static int name_offset;
703 static int type_offset;
704 static int slot_offset;
705 static int modifiers_offset;
706 static int signature_offset;
707 static int annotations_offset;
708 static int type_annotations_offset;
710 static void compute_offsets();
712 public:
713 // Allocation
714 static Handle create(TRAPS);
716 // Accessors
717 static oop clazz(oop reflect);
718 static void set_clazz(oop reflect, oop value);
720 static oop name(oop field);
721 static void set_name(oop field, oop value);
723 static oop type(oop field);
724 static void set_type(oop field, oop value);
726 static int slot(oop reflect);
727 static void set_slot(oop reflect, int value);
729 static int modifiers(oop field);
730 static void set_modifiers(oop field, int value);
732 static bool has_signature_field();
733 static oop signature(oop constructor);
734 static void set_signature(oop constructor, oop value);
736 static bool has_annotations_field();
737 static oop annotations(oop constructor);
738 static void set_annotations(oop constructor, oop value);
740 static bool has_parameter_annotations_field();
741 static oop parameter_annotations(oop method);
742 static void set_parameter_annotations(oop method, oop value);
744 static bool has_annotation_default_field();
745 static oop annotation_default(oop method);
746 static void set_annotation_default(oop method, oop value);
748 static bool has_type_annotations_field();
749 static oop type_annotations(oop field);
750 static void set_type_annotations(oop field, oop value);
752 // Debugging
753 friend class JavaClasses;
754 };
756 class java_lang_reflect_Parameter {
757 private:
758 // Note that to reduce dependencies on the JDK we compute these
759 // offsets at run-time.
760 static int name_offset;
761 static int modifiers_offset;
762 static int index_offset;
763 static int executable_offset;
765 static void compute_offsets();
767 public:
768 // Allocation
769 static Handle create(TRAPS);
771 // Accessors
772 static oop name(oop field);
773 static void set_name(oop field, oop value);
775 static int index(oop reflect);
776 static void set_index(oop reflect, int value);
778 static int modifiers(oop reflect);
779 static void set_modifiers(oop reflect, int value);
781 static oop executable(oop constructor);
782 static void set_executable(oop constructor, oop value);
784 friend class JavaClasses;
785 };
787 // Interface to sun.reflect.ConstantPool objects
788 class sun_reflect_ConstantPool {
789 private:
790 // Note that to reduce dependencies on the JDK we compute these
791 // offsets at run-time.
792 static int _oop_offset;
794 static void compute_offsets();
796 public:
797 // Allocation
798 static Handle create(TRAPS);
800 // Accessors
801 static void set_cp(oop reflect, ConstantPool* value);
802 static int oop_offset() {
803 return _oop_offset;
804 }
806 static ConstantPool* get_cp(oop reflect);
808 // Debugging
809 friend class JavaClasses;
810 };
812 // Interface to sun.reflect.UnsafeStaticFieldAccessorImpl objects
813 class sun_reflect_UnsafeStaticFieldAccessorImpl {
814 private:
815 static int _base_offset;
816 static void compute_offsets();
818 public:
819 static int base_offset() {
820 return _base_offset;
821 }
823 // Debugging
824 friend class JavaClasses;
825 };
827 // Interface to java.lang primitive type boxing objects:
828 // - java.lang.Boolean
829 // - java.lang.Character
830 // - java.lang.Float
831 // - java.lang.Double
832 // - java.lang.Byte
833 // - java.lang.Short
834 // - java.lang.Integer
835 // - java.lang.Long
837 // This could be separated out into 8 individual classes.
839 class java_lang_boxing_object: AllStatic {
840 private:
841 enum {
842 hc_value_offset = 0
843 };
844 static int value_offset;
845 static int long_value_offset;
847 static oop initialize_and_allocate(BasicType type, TRAPS);
848 public:
849 // Allocation. Returns a boxed value, or NULL for invalid type.
850 static oop create(BasicType type, jvalue* value, TRAPS);
851 // Accessors. Returns the basic type being boxed, or T_ILLEGAL for invalid oop.
852 static BasicType get_value(oop box, jvalue* value);
853 static BasicType set_value(oop box, jvalue* value);
854 static BasicType basic_type(oop box);
855 static bool is_instance(oop box) { return basic_type(box) != T_ILLEGAL; }
856 static bool is_instance(oop box, BasicType type) { return basic_type(box) == type; }
857 static void print(oop box, outputStream* st) { jvalue value; print(get_value(box, &value), &value, st); }
858 static void print(BasicType type, jvalue* value, outputStream* st);
860 static int value_offset_in_bytes(BasicType type) {
861 return ( type == T_LONG || type == T_DOUBLE ) ? long_value_offset :
862 value_offset;
863 }
865 // Debugging
866 friend class JavaClasses;
867 };
871 // Interface to java.lang.ref.Reference objects
873 class java_lang_ref_Reference: AllStatic {
874 public:
875 enum {
876 hc_referent_offset = 0,
877 hc_queue_offset = 1,
878 hc_next_offset = 2,
879 hc_discovered_offset = 3 // Is not last, see SoftRefs.
880 };
881 enum {
882 hc_static_lock_offset = 0,
883 hc_static_pending_offset = 1
884 };
886 static int referent_offset;
887 static int queue_offset;
888 static int next_offset;
889 static int discovered_offset;
890 static int static_lock_offset;
891 static int static_pending_offset;
892 static int number_of_fake_oop_fields;
894 // Accessors
895 static oop referent(oop ref) {
896 return ref->obj_field(referent_offset);
897 }
898 static void set_referent(oop ref, oop value) {
899 ref->obj_field_put(referent_offset, value);
900 }
901 static void set_referent_raw(oop ref, oop value) {
902 ref->obj_field_put_raw(referent_offset, value);
903 }
904 static HeapWord* referent_addr(oop ref) {
905 return ref->obj_field_addr<HeapWord>(referent_offset);
906 }
907 static oop next(oop ref) {
908 return ref->obj_field(next_offset);
909 }
910 static void set_next(oop ref, oop value) {
911 ref->obj_field_put(next_offset, value);
912 }
913 static void set_next_raw(oop ref, oop value) {
914 ref->obj_field_put_raw(next_offset, value);
915 }
916 static HeapWord* next_addr(oop ref) {
917 return ref->obj_field_addr<HeapWord>(next_offset);
918 }
919 static oop discovered(oop ref) {
920 return ref->obj_field(discovered_offset);
921 }
922 static void set_discovered(oop ref, oop value) {
923 ref->obj_field_put(discovered_offset, value);
924 }
925 static void set_discovered_raw(oop ref, oop value) {
926 ref->obj_field_put_raw(discovered_offset, value);
927 }
928 static HeapWord* discovered_addr(oop ref) {
929 return ref->obj_field_addr<HeapWord>(discovered_offset);
930 }
931 // Accessors for statics
932 static oop pending_list_lock();
933 static oop pending_list();
935 static HeapWord* pending_list_lock_addr();
936 static HeapWord* pending_list_addr();
937 };
940 // Interface to java.lang.ref.SoftReference objects
942 class java_lang_ref_SoftReference: public java_lang_ref_Reference {
943 public:
944 enum {
945 // The timestamp is a long field and may need to be adjusted for alignment.
946 hc_timestamp_offset = hc_discovered_offset + 1
947 };
948 enum {
949 hc_static_clock_offset = 0
950 };
952 static int timestamp_offset;
953 static int static_clock_offset;
955 // Accessors
956 static jlong timestamp(oop ref);
958 // Accessors for statics
959 static jlong clock();
960 static void set_clock(jlong value);
961 };
964 // Interface to java.lang.invoke.MethodHandle objects
966 class MethodHandleEntry;
968 class java_lang_invoke_MethodHandle: AllStatic {
969 friend class JavaClasses;
971 private:
972 static int _type_offset; // the MethodType of this MH
973 static int _form_offset; // the LambdaForm of this MH
975 static void compute_offsets();
977 public:
978 // Accessors
979 static oop type(oop mh);
980 static void set_type(oop mh, oop mtype);
982 static oop form(oop mh);
983 static void set_form(oop mh, oop lform);
985 // Testers
986 static bool is_subclass(Klass* klass) {
987 return klass->is_subclass_of(SystemDictionary::MethodHandle_klass());
988 }
989 static bool is_instance(oop obj) {
990 return obj != NULL && is_subclass(obj->klass());
991 }
993 // Accessors for code generation:
994 static int type_offset_in_bytes() { return _type_offset; }
995 static int form_offset_in_bytes() { return _form_offset; }
996 };
998 // Interface to java.lang.invoke.DirectMethodHandle objects
1000 class java_lang_invoke_DirectMethodHandle: AllStatic {
1001 friend class JavaClasses;
1003 private:
1004 static int _member_offset; // the MemberName of this DMH
1006 static void compute_offsets();
1008 public:
1009 // Accessors
1010 static oop member(oop mh);
1012 // Testers
1013 static bool is_subclass(Klass* klass) {
1014 return klass->is_subclass_of(SystemDictionary::DirectMethodHandle_klass());
1015 }
1016 static bool is_instance(oop obj) {
1017 return obj != NULL && is_subclass(obj->klass());
1018 }
1020 // Accessors for code generation:
1021 static int member_offset_in_bytes() { return _member_offset; }
1022 };
1024 // Interface to java.lang.invoke.LambdaForm objects
1025 // (These are a private interface for managing adapter code generation.)
1027 class java_lang_invoke_LambdaForm: AllStatic {
1028 friend class JavaClasses;
1030 private:
1031 static int _vmentry_offset; // type is MemberName
1033 static void compute_offsets();
1035 public:
1036 // Accessors
1037 static oop vmentry(oop lform);
1038 static void set_vmentry(oop lform, oop invoker);
1040 // Testers
1041 static bool is_subclass(Klass* klass) {
1042 return SystemDictionary::LambdaForm_klass() != NULL &&
1043 klass->is_subclass_of(SystemDictionary::LambdaForm_klass());
1044 }
1045 static bool is_instance(oop obj) {
1046 return obj != NULL && is_subclass(obj->klass());
1047 }
1049 // Accessors for code generation:
1050 static int vmentry_offset_in_bytes() { return _vmentry_offset; }
1051 };
1054 // Interface to java.lang.invoke.MemberName objects
1055 // (These are a private interface for Java code to query the class hierarchy.)
1057 #define MEMBERNAME_INJECTED_FIELDS(macro) \
1058 macro(java_lang_invoke_MemberName, vmloader, object_signature, false) \
1059 macro(java_lang_invoke_MemberName, vmindex, intptr_signature, false) \
1060 macro(java_lang_invoke_MemberName, vmtarget, intptr_signature, false)
1062 class java_lang_invoke_MemberName: AllStatic {
1063 friend class JavaClasses;
1065 private:
1066 // From java.lang.invoke.MemberName:
1067 // private Class<?> clazz; // class in which the method is defined
1068 // private String name; // may be null if not yet materialized
1069 // private Object type; // may be null if not yet materialized
1070 // private int flags; // modifier bits; see reflect.Modifier
1071 // private intptr vmtarget; // VM-specific target value
1072 // private intptr_t vmindex; // member index within class or interface
1073 static int _clazz_offset;
1074 static int _name_offset;
1075 static int _type_offset;
1076 static int _flags_offset;
1077 static int _vmtarget_offset;
1078 static int _vmloader_offset;
1079 static int _vmindex_offset;
1081 static void compute_offsets();
1083 public:
1084 // Accessors
1085 static oop clazz(oop mname);
1086 static void set_clazz(oop mname, oop clazz);
1088 static oop type(oop mname);
1089 static void set_type(oop mname, oop type);
1091 static oop name(oop mname);
1092 static void set_name(oop mname, oop name);
1094 static int flags(oop mname);
1095 static void set_flags(oop mname, int flags);
1097 static Metadata* vmtarget(oop mname);
1098 static void set_vmtarget(oop mname, Metadata* target);
1099 #if INCLUDE_JVMTI
1100 static void adjust_vmtarget(oop mname, Method* old_method, Method* new_method,
1101 bool* trace_name_printed);
1102 #endif // INCLUDE_JVMTI
1104 static intptr_t vmindex(oop mname);
1105 static void set_vmindex(oop mname, intptr_t index);
1107 // Testers
1108 static bool is_subclass(Klass* klass) {
1109 return klass->is_subclass_of(SystemDictionary::MemberName_klass());
1110 }
1111 static bool is_instance(oop obj) {
1112 return obj != NULL && is_subclass(obj->klass());
1113 }
1115 static bool is_method(oop obj);
1117 // Relevant integer codes (keep these in synch. with MethodHandleNatives.Constants):
1118 enum {
1119 MN_IS_METHOD = 0x00010000, // method (not constructor)
1120 MN_IS_CONSTRUCTOR = 0x00020000, // constructor
1121 MN_IS_FIELD = 0x00040000, // field
1122 MN_IS_TYPE = 0x00080000, // nested type
1123 MN_CALLER_SENSITIVE = 0x00100000, // @CallerSensitive annotation detected
1124 MN_REFERENCE_KIND_SHIFT = 24, // refKind
1125 MN_REFERENCE_KIND_MASK = 0x0F000000 >> MN_REFERENCE_KIND_SHIFT,
1126 // The SEARCH_* bits are not for MN.flags but for the matchFlags argument of MHN.getMembers:
1127 MN_SEARCH_SUPERCLASSES = 0x00100000, // walk super classes
1128 MN_SEARCH_INTERFACES = 0x00200000 // walk implemented interfaces
1129 };
1131 // Accessors for code generation:
1132 static int clazz_offset_in_bytes() { return _clazz_offset; }
1133 static int type_offset_in_bytes() { return _type_offset; }
1134 static int name_offset_in_bytes() { return _name_offset; }
1135 static int flags_offset_in_bytes() { return _flags_offset; }
1136 static int vmtarget_offset_in_bytes() { return _vmtarget_offset; }
1137 static int vmindex_offset_in_bytes() { return _vmindex_offset; }
1138 };
1141 // Interface to java.lang.invoke.MethodType objects
1143 class java_lang_invoke_MethodType: AllStatic {
1144 friend class JavaClasses;
1146 private:
1147 static int _rtype_offset;
1148 static int _ptypes_offset;
1150 static void compute_offsets();
1152 public:
1153 // Accessors
1154 static oop rtype(oop mt);
1155 static objArrayOop ptypes(oop mt);
1157 static oop ptype(oop mt, int index);
1158 static int ptype_count(oop mt);
1160 static int ptype_slot_count(oop mt); // extra counts for long/double
1161 static int rtype_slot_count(oop mt); // extra counts for long/double
1163 static Symbol* as_signature(oop mt, bool intern_if_not_found, TRAPS);
1164 static void print_signature(oop mt, outputStream* st);
1166 static bool is_instance(oop obj) {
1167 return obj != NULL && obj->klass() == SystemDictionary::MethodType_klass();
1168 }
1170 static bool equals(oop mt1, oop mt2);
1172 // Accessors for code generation:
1173 static int rtype_offset_in_bytes() { return _rtype_offset; }
1174 static int ptypes_offset_in_bytes() { return _ptypes_offset; }
1175 };
1178 // Interface to java.lang.invoke.CallSite objects
1180 class java_lang_invoke_CallSite: AllStatic {
1181 friend class JavaClasses;
1183 private:
1184 static int _target_offset;
1186 static void compute_offsets();
1188 public:
1189 // Accessors
1190 static oop target( oop site) { return site->obj_field( _target_offset); }
1191 static void set_target( oop site, oop target) { site->obj_field_put( _target_offset, target); }
1193 static volatile oop target_volatile(oop site) { return site->obj_field_volatile( _target_offset); }
1194 static void set_target_volatile(oop site, oop target) { site->obj_field_put_volatile(_target_offset, target); }
1196 // Testers
1197 static bool is_subclass(Klass* klass) {
1198 return klass->is_subclass_of(SystemDictionary::CallSite_klass());
1199 }
1200 static bool is_instance(oop obj) {
1201 return obj != NULL && is_subclass(obj->klass());
1202 }
1204 // Accessors for code generation:
1205 static int target_offset_in_bytes() { return _target_offset; }
1206 };
1209 // Interface to java.security.AccessControlContext objects
1211 class java_security_AccessControlContext: AllStatic {
1212 private:
1213 // Note that for this class the layout changed between JDK1.2 and JDK1.3,
1214 // so we compute the offsets at startup rather than hard-wiring them.
1215 static int _context_offset;
1216 static int _privilegedContext_offset;
1217 static int _isPrivileged_offset;
1218 static int _isAuthorized_offset;
1220 static void compute_offsets();
1221 public:
1222 static oop create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS);
1224 static bool is_authorized(Handle context);
1226 // Debugging/initialization
1227 friend class JavaClasses;
1228 };
1231 // Interface to java.lang.ClassLoader objects
1233 #define CLASSLOADER_INJECTED_FIELDS(macro) \
1234 macro(java_lang_ClassLoader, loader_data, intptr_signature, false)
1236 class java_lang_ClassLoader : AllStatic {
1237 private:
1238 // The fake offsets are added by the class loader when java.lang.Class is loaded
1239 enum {
1240 hc_parent_offset = 0
1241 };
1242 static int _loader_data_offset;
1243 static bool offsets_computed;
1244 static int parent_offset;
1245 static int parallelCapable_offset;
1247 public:
1248 static void compute_offsets();
1250 static ClassLoaderData** loader_data_addr(oop loader);
1251 static ClassLoaderData* loader_data(oop loader);
1253 static oop parent(oop loader);
1254 static bool isAncestor(oop loader, oop cl);
1256 // Support for parallelCapable field
1257 static bool parallelCapable(oop the_class_mirror);
1259 static bool is_trusted_loader(oop loader);
1261 // Fix for 4474172
1262 static oop non_reflection_class_loader(oop loader);
1264 // Testers
1265 static bool is_subclass(Klass* klass) {
1266 return klass->is_subclass_of(SystemDictionary::ClassLoader_klass());
1267 }
1268 static bool is_instance(oop obj) {
1269 return obj != NULL && is_subclass(obj->klass());
1270 }
1272 // Debugging
1273 friend class JavaClasses;
1274 friend class ClassFileParser; // access to number_of_fake_fields
1275 };
1278 // Interface to java.lang.System objects
1280 class java_lang_System : AllStatic {
1281 private:
1282 enum {
1283 hc_static_in_offset = 0,
1284 hc_static_out_offset = 1,
1285 hc_static_err_offset = 2,
1286 hc_static_security_offset = 3
1287 };
1289 static int static_in_offset;
1290 static int static_out_offset;
1291 static int static_err_offset;
1292 static int static_security_offset;
1294 public:
1295 static int in_offset_in_bytes();
1296 static int out_offset_in_bytes();
1297 static int err_offset_in_bytes();
1299 static bool has_security_manager();
1301 // Debugging
1302 friend class JavaClasses;
1303 };
1306 // Interface to java.lang.StackTraceElement objects
1308 class java_lang_StackTraceElement: AllStatic {
1309 private:
1310 enum {
1311 hc_declaringClass_offset = 0,
1312 hc_methodName_offset = 1,
1313 hc_fileName_offset = 2,
1314 hc_lineNumber_offset = 3
1315 };
1317 static int declaringClass_offset;
1318 static int methodName_offset;
1319 static int fileName_offset;
1320 static int lineNumber_offset;
1322 public:
1323 // Setters
1324 static void set_declaringClass(oop element, oop value);
1325 static void set_methodName(oop element, oop value);
1326 static void set_fileName(oop element, oop value);
1327 static void set_lineNumber(oop element, int value);
1329 // Create an instance of StackTraceElement
1330 static oop create(Handle mirror, int method, int version, int bci, int cpref, TRAPS);
1331 static oop create(methodHandle method, int bci, TRAPS);
1333 // Debugging
1334 friend class JavaClasses;
1335 };
1338 // Interface to java.lang.AssertionStatusDirectives objects
1340 class java_lang_AssertionStatusDirectives: AllStatic {
1341 private:
1342 enum {
1343 hc_classes_offset,
1344 hc_classEnabled_offset,
1345 hc_packages_offset,
1346 hc_packageEnabled_offset,
1347 hc_deflt_offset
1348 };
1350 static int classes_offset;
1351 static int classEnabled_offset;
1352 static int packages_offset;
1353 static int packageEnabled_offset;
1354 static int deflt_offset;
1356 public:
1357 // Setters
1358 static void set_classes(oop obj, oop val);
1359 static void set_classEnabled(oop obj, oop val);
1360 static void set_packages(oop obj, oop val);
1361 static void set_packageEnabled(oop obj, oop val);
1362 static void set_deflt(oop obj, bool val);
1363 // Debugging
1364 friend class JavaClasses;
1365 };
1368 class java_nio_Buffer: AllStatic {
1369 private:
1370 static int _limit_offset;
1372 public:
1373 static int limit_offset();
1374 static void compute_offsets();
1375 };
1377 class java_util_concurrent_locks_AbstractOwnableSynchronizer : AllStatic {
1378 private:
1379 static int _owner_offset;
1380 public:
1381 static void initialize(TRAPS);
1382 static oop get_owner_threadObj(oop obj);
1383 };
1385 // Use to declare fields that need to be injected into Java classes
1386 // for the JVM to use. The name_index and signature_index are
1387 // declared in vmSymbols. The may_be_java flag is used to declare
1388 // fields that might already exist in Java but should be injected if
1389 // they don't. Otherwise the field is unconditionally injected and
1390 // the JVM uses the injected one. This is to ensure that name
1391 // collisions don't occur. In general may_be_java should be false
1392 // unless there's a good reason.
1394 class InjectedField {
1395 public:
1396 const SystemDictionary::WKID klass_id;
1397 const vmSymbols::SID name_index;
1398 const vmSymbols::SID signature_index;
1399 const bool may_be_java;
1402 Klass* klass() const { return SystemDictionary::well_known_klass(klass_id); }
1403 Symbol* name() const { return lookup_symbol(name_index); }
1404 Symbol* signature() const { return lookup_symbol(signature_index); }
1406 int compute_offset();
1408 // Find the Symbol for this index
1409 static Symbol* lookup_symbol(int symbol_index) {
1410 return vmSymbols::symbol_at((vmSymbols::SID)symbol_index);
1411 }
1412 };
1414 #define DECLARE_INJECTED_FIELD_ENUM(klass, name, signature, may_be_java) \
1415 klass##_##name##_enum,
1417 #define ALL_INJECTED_FIELDS(macro) \
1418 CLASS_INJECTED_FIELDS(macro) \
1419 CLASSLOADER_INJECTED_FIELDS(macro) \
1420 MEMBERNAME_INJECTED_FIELDS(macro)
1422 // Interface to hard-coded offset checking
1424 class JavaClasses : AllStatic {
1425 private:
1427 static InjectedField _injected_fields[];
1429 static bool check_offset(const char *klass_name, int offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1430 static bool check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1431 static bool check_constant(const char *klass_name, int constant, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1433 public:
1434 enum InjectedFieldID {
1435 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD_ENUM)
1436 MAX_enum
1437 };
1439 static int compute_injected_offset(InjectedFieldID id);
1441 static void compute_hard_coded_offsets();
1442 static void compute_offsets();
1443 static void check_offsets() PRODUCT_RETURN;
1445 static InjectedField* get_injected(Symbol* class_name, int* field_count);
1446 };
1448 #undef DECLARE_INJECTED_FIELD_ENUM
1450 #endif // SHARE_VM_CLASSFILE_JAVACLASSES_HPP