Mon, 12 Nov 2012 16:15:05 -0500
8001471: Klass::cast() does nothing
Summary: Remove function Klass::cast() and calls to it.
Reviewed-by: dholmes, coleenp
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.
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23 */
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_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 }
81 public:
82 static void compute_offsets();
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);
93 static bool has_offset_field() {
94 assert(initialized, "Must be initialized");
95 return (offset_offset > 0);
96 }
98 static bool has_count_field() {
99 assert(initialized, "Must be initialized");
100 return (count_offset > 0);
101 }
103 static bool has_hash_field() {
104 assert(initialized, "Must be initialized");
105 return (hash_offset > 0);
106 }
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 }
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);
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);
158 // Compute the hash value for a java.lang.String object which would
159 // contain the characters passed in.
160 //
161 // As the hash value used by the String object itself, in
162 // String.hashCode(). This value is normally calculated in Java code
163 // in the String.hashCode method(), but is precomputed for String
164 // objects in the shared archive file.
165 // hash P(31) from Kernighan & Ritchie
166 //
167 // For this reason, THIS ALGORITHM MUST MATCH String.toHash().
168 template <typename T> static unsigned int to_hash(T* s, int len) {
169 unsigned int h = 0;
170 while (len-- > 0) {
171 h = 31*h + (unsigned int) *s;
172 s++;
173 }
174 return h;
175 }
176 static unsigned int to_hash(oop java_string);
178 // This is the string hash code used by the StringTable, which may be
179 // the same as String.toHash or an alternate hash code.
180 static unsigned int hash_string(oop java_string);
182 static bool equals(oop java_string, jchar* chars, int len);
184 // Conversion between '.' and '/' formats
185 static Handle externalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '/', '.', THREAD); }
186 static Handle internalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '.', '/', THREAD); }
188 // Conversion
189 static Symbol* as_symbol(Handle java_string, TRAPS);
190 static Symbol* as_symbol_or_null(oop java_string);
192 // Testers
193 static bool is_instance(oop obj) {
194 return obj != NULL && obj->klass() == SystemDictionary::String_klass();
195 }
197 // Debugging
198 static void print(Handle java_string, outputStream* st);
199 friend class JavaClasses;
200 };
203 // Interface to java.lang.Class objects
205 #define CLASS_INJECTED_FIELDS(macro) \
206 macro(java_lang_Class, klass, intptr_signature, false) \
207 macro(java_lang_Class, resolved_constructor, intptr_signature, false) \
208 macro(java_lang_Class, array_klass, intptr_signature, false) \
209 macro(java_lang_Class, oop_size, int_signature, false) \
210 macro(java_lang_Class, static_oop_field_count, int_signature, false)
212 class java_lang_Class : AllStatic {
213 friend class VMStructs;
215 private:
216 // The fake offsets are added by the class loader when java.lang.Class is loaded
218 static int _klass_offset;
219 static int _resolved_constructor_offset;
220 static int _array_klass_offset;
222 static int _oop_size_offset;
223 static int _static_oop_field_count_offset;
225 static bool offsets_computed;
226 static int classRedefinedCount_offset;
227 static GrowableArray<Klass*>* _fixup_mirror_list;
229 public:
230 static void compute_offsets();
232 // Instance creation
233 static oop create_mirror(KlassHandle k, TRAPS);
234 static void fixup_mirror(KlassHandle k, TRAPS);
235 static oop create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS);
236 // Conversion
237 static Klass* as_Klass(oop java_class);
238 static void set_klass(oop java_class, Klass* klass);
239 static BasicType as_BasicType(oop java_class, Klass** reference_klass = NULL);
240 static BasicType as_BasicType(oop java_class, KlassHandle* reference_klass) {
241 Klass* refk_oop = NULL;
242 BasicType result = as_BasicType(java_class, &refk_oop);
243 (*reference_klass) = KlassHandle(refk_oop);
244 return result;
245 }
246 static Symbol* as_signature(oop java_class, bool intern_if_not_found, TRAPS);
247 static void print_signature(oop java_class, outputStream *st);
248 // Testing
249 static bool is_instance(oop obj) {
250 return obj != NULL && obj->klass() == SystemDictionary::Class_klass();
251 }
252 static bool is_primitive(oop java_class);
253 static BasicType primitive_type(oop java_class);
254 static oop primitive_mirror(BasicType t);
255 // JVM_NewInstance support
256 static Method* resolved_constructor(oop java_class);
257 static void set_resolved_constructor(oop java_class, Method* constructor);
258 // JVM_NewArray support
259 static Klass* array_klass(oop java_class);
260 static void set_array_klass(oop java_class, Klass* klass);
261 // compiler support for class operations
262 static int klass_offset_in_bytes() { return _klass_offset; }
263 static int resolved_constructor_offset_in_bytes() { return _resolved_constructor_offset; }
264 static int array_klass_offset_in_bytes() { return _array_klass_offset; }
265 // Support for classRedefinedCount field
266 static int classRedefinedCount(oop the_class_mirror);
267 static void set_classRedefinedCount(oop the_class_mirror, int value);
269 static int oop_size(oop java_class);
270 static void set_oop_size(oop java_class, int size);
271 static int static_oop_field_count(oop java_class);
272 static void set_static_oop_field_count(oop java_class, int size);
274 static GrowableArray<Klass*>* fixup_mirror_list() {
275 return _fixup_mirror_list;
276 }
277 static void set_fixup_mirror_list(GrowableArray<Klass*>* v) {
278 _fixup_mirror_list = v;
279 }
280 // Debugging
281 friend class JavaClasses;
282 friend class InstanceKlass; // verification code accesses offsets
283 friend class ClassFileParser; // access to number_of_fake_fields
284 };
286 // Interface to java.lang.Thread objects
288 class java_lang_Thread : AllStatic {
289 private:
290 // Note that for this class the layout changed between JDK1.2 and JDK1.3,
291 // so we compute the offsets at startup rather than hard-wiring them.
292 static int _name_offset;
293 static int _group_offset;
294 static int _contextClassLoader_offset;
295 static int _inheritedAccessControlContext_offset;
296 static int _priority_offset;
297 static int _eetop_offset;
298 static int _daemon_offset;
299 static int _stillborn_offset;
300 static int _stackSize_offset;
301 static int _tid_offset;
302 static int _thread_status_offset;
303 static int _park_blocker_offset;
304 static int _park_event_offset ;
306 static void compute_offsets();
308 public:
309 // Instance creation
310 static oop create();
311 // Returns the JavaThread associated with the thread obj
312 static JavaThread* thread(oop java_thread);
313 // Set JavaThread for instance
314 static void set_thread(oop java_thread, JavaThread* thread);
315 // Name
316 static typeArrayOop name(oop java_thread);
317 static void set_name(oop java_thread, typeArrayOop name);
318 // Priority
319 static ThreadPriority priority(oop java_thread);
320 static void set_priority(oop java_thread, ThreadPriority priority);
321 // Thread group
322 static oop threadGroup(oop java_thread);
323 // Stillborn
324 static bool is_stillborn(oop java_thread);
325 static void set_stillborn(oop java_thread);
326 // Alive (NOTE: this is not really a field, but provides the correct
327 // definition without doing a Java call)
328 static bool is_alive(oop java_thread);
329 // Daemon
330 static bool is_daemon(oop java_thread);
331 static void set_daemon(oop java_thread);
332 // Context ClassLoader
333 static oop context_class_loader(oop java_thread);
334 // Control context
335 static oop inherited_access_control_context(oop java_thread);
336 // Stack size hint
337 static jlong stackSize(oop java_thread);
338 // Thread ID
339 static jlong thread_id(oop java_thread);
341 // Blocker object responsible for thread parking
342 static oop park_blocker(oop java_thread);
344 // Pointer to type-stable park handler, encoded as jlong.
345 // Should be set when apparently null
346 // For details, see unsafe.cpp Unsafe_Unpark
347 static jlong park_event(oop java_thread);
348 static bool set_park_event(oop java_thread, jlong ptr);
350 // Java Thread Status for JVMTI and M&M use.
351 // This thread status info is saved in threadStatus field of
352 // java.lang.Thread java class.
353 enum ThreadStatus {
354 NEW = 0,
355 RUNNABLE = JVMTI_THREAD_STATE_ALIVE + // runnable / running
356 JVMTI_THREAD_STATE_RUNNABLE,
357 SLEEPING = JVMTI_THREAD_STATE_ALIVE + // Thread.sleep()
358 JVMTI_THREAD_STATE_WAITING +
359 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
360 JVMTI_THREAD_STATE_SLEEPING,
361 IN_OBJECT_WAIT = JVMTI_THREAD_STATE_ALIVE + // Object.wait()
362 JVMTI_THREAD_STATE_WAITING +
363 JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
364 JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
365 IN_OBJECT_WAIT_TIMED = JVMTI_THREAD_STATE_ALIVE + // Object.wait(long)
366 JVMTI_THREAD_STATE_WAITING +
367 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
368 JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
369 PARKED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park()
370 JVMTI_THREAD_STATE_WAITING +
371 JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
372 JVMTI_THREAD_STATE_PARKED,
373 PARKED_TIMED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park(long)
374 JVMTI_THREAD_STATE_WAITING +
375 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
376 JVMTI_THREAD_STATE_PARKED,
377 BLOCKED_ON_MONITOR_ENTER = JVMTI_THREAD_STATE_ALIVE + // (re-)entering a synchronization block
378 JVMTI_THREAD_STATE_BLOCKED_ON_MONITOR_ENTER,
379 TERMINATED = JVMTI_THREAD_STATE_TERMINATED
380 };
381 // Write thread status info to threadStatus field of java.lang.Thread.
382 static void set_thread_status(oop java_thread_oop, ThreadStatus status);
383 // Read thread status info from threadStatus field of java.lang.Thread.
384 static ThreadStatus get_thread_status(oop java_thread_oop);
386 static const char* thread_status_name(oop java_thread_oop);
388 // Debugging
389 friend class JavaClasses;
390 };
392 // Interface to java.lang.ThreadGroup objects
394 class java_lang_ThreadGroup : AllStatic {
395 private:
396 static int _parent_offset;
397 static int _name_offset;
398 static int _threads_offset;
399 static int _groups_offset;
400 static int _maxPriority_offset;
401 static int _destroyed_offset;
402 static int _daemon_offset;
403 static int _vmAllowSuspension_offset;
404 static int _nthreads_offset;
405 static int _ngroups_offset;
407 static void compute_offsets();
409 public:
410 // parent ThreadGroup
411 static oop parent(oop java_thread_group);
412 // name
413 static typeArrayOop name(oop java_thread_group);
414 // ("name as oop" accessor is not necessary)
415 // Number of threads in group
416 static int nthreads(oop java_thread_group);
417 // threads
418 static objArrayOop threads(oop java_thread_group);
419 // Number of threads in group
420 static int ngroups(oop java_thread_group);
421 // groups
422 static objArrayOop groups(oop java_thread_group);
423 // maxPriority in group
424 static ThreadPriority maxPriority(oop java_thread_group);
425 // Destroyed
426 static bool is_destroyed(oop java_thread_group);
427 // Daemon
428 static bool is_daemon(oop java_thread_group);
429 // vmAllowSuspension
430 static bool is_vmAllowSuspension(oop java_thread_group);
431 // Debugging
432 friend class JavaClasses;
433 };
437 // Interface to java.lang.Throwable objects
439 class java_lang_Throwable: AllStatic {
440 friend class BacktraceBuilder;
442 private:
443 // Offsets
444 enum {
445 hc_backtrace_offset = 0,
446 hc_detailMessage_offset = 1,
447 hc_cause_offset = 2, // New since 1.4
448 hc_stackTrace_offset = 3 // New since 1.4
449 };
450 enum {
451 hc_static_unassigned_stacktrace_offset = 0 // New since 1.7
452 };
453 // Trace constants
454 enum {
455 trace_methods_offset = 0,
456 trace_bcis_offset = 1,
457 trace_mirrors_offset = 2,
458 trace_next_offset = 3,
459 trace_size = 4,
460 trace_chunk_size = 32
461 };
463 static int backtrace_offset;
464 static int detailMessage_offset;
465 static int cause_offset;
466 static int stackTrace_offset;
467 static int static_unassigned_stacktrace_offset;
469 // Printing
470 static char* print_stack_element_to_buffer(Method* method, int bci);
471 static void print_to_stream(Handle stream, const char* str);
472 // StackTrace (programmatic access, new since 1.4)
473 static void clear_stacktrace(oop throwable);
474 // No stack trace available
475 static const char* no_stack_trace_message();
476 // Stacktrace (post JDK 1.7.0 to allow immutability protocol to be followed)
477 static void set_stacktrace(oop throwable, oop st_element_array);
478 static oop unassigned_stacktrace();
480 public:
481 // Backtrace
482 static oop backtrace(oop throwable);
483 static void set_backtrace(oop throwable, oop value);
484 // Needed by JVMTI to filter out this internal field.
485 static int get_backtrace_offset() { return backtrace_offset;}
486 static int get_detailMessage_offset() { return detailMessage_offset;}
487 // Message
488 static oop message(oop throwable);
489 static oop message(Handle throwable);
490 static void set_message(oop throwable, oop value);
491 // Print stack trace stored in exception by call-back to Java
492 // Note: this is no longer used in Merlin, but we still suppport
493 // it for compatibility.
494 static void print_stack_trace(oop throwable, oop print_stream);
495 static void print_stack_element(Handle stream, Method* method, int bci);
496 static void print_stack_element(outputStream *st, Method* method, int bci);
497 static void print_stack_usage(Handle stream);
499 // Allocate space for backtrace (created but stack trace not filled in)
500 static void allocate_backtrace(Handle throwable, TRAPS);
501 // Fill in current stack trace for throwable with preallocated backtrace (no GC)
502 static void fill_in_stack_trace_of_preallocated_backtrace(Handle throwable);
503 // Fill in current stack trace, can cause GC
504 static void fill_in_stack_trace(Handle throwable, methodHandle method, TRAPS);
505 static void fill_in_stack_trace(Handle throwable, methodHandle method = methodHandle());
506 // Programmatic access to stack trace
507 static oop get_stack_trace_element(oop throwable, int index, TRAPS);
508 static int get_stack_trace_depth(oop throwable, TRAPS);
509 // Printing
510 static void print(oop throwable, outputStream* st);
511 static void print(Handle throwable, outputStream* st);
512 static void print_stack_trace(oop throwable, outputStream* st);
513 // Debugging
514 friend class JavaClasses;
515 };
518 // Interface to java.lang.reflect.AccessibleObject objects
520 class java_lang_reflect_AccessibleObject: AllStatic {
521 private:
522 // Note that to reduce dependencies on the JDK we compute these
523 // offsets at run-time.
524 static int override_offset;
526 static void compute_offsets();
528 public:
529 // Accessors
530 static jboolean override(oop reflect);
531 static void set_override(oop reflect, jboolean value);
533 // Debugging
534 friend class JavaClasses;
535 };
538 // Interface to java.lang.reflect.Method objects
540 class java_lang_reflect_Method : public java_lang_reflect_AccessibleObject {
541 private:
542 // Note that to reduce dependencies on the JDK we compute these
543 // offsets at run-time.
544 static int clazz_offset;
545 static int name_offset;
546 static int returnType_offset;
547 static int parameterTypes_offset;
548 static int exceptionTypes_offset;
549 static int slot_offset;
550 static int modifiers_offset;
551 static int signature_offset;
552 static int annotations_offset;
553 static int parameter_annotations_offset;
554 static int annotation_default_offset;
556 static void compute_offsets();
558 public:
559 // Allocation
560 static Handle create(TRAPS);
562 // Accessors
563 static oop clazz(oop reflect);
564 static void set_clazz(oop reflect, oop value);
566 static oop name(oop method);
567 static void set_name(oop method, oop value);
569 static oop return_type(oop method);
570 static void set_return_type(oop method, oop value);
572 static oop parameter_types(oop method);
573 static void set_parameter_types(oop method, oop value);
575 static oop exception_types(oop method);
576 static void set_exception_types(oop method, oop value);
578 static int slot(oop reflect);
579 static void set_slot(oop reflect, int value);
581 static int modifiers(oop method);
582 static void set_modifiers(oop method, int value);
584 static bool has_signature_field();
585 static oop signature(oop method);
586 static void set_signature(oop method, oop value);
588 static bool has_annotations_field();
589 static oop annotations(oop method);
590 static void set_annotations(oop method, oop value);
592 static bool has_parameter_annotations_field();
593 static oop parameter_annotations(oop method);
594 static void set_parameter_annotations(oop method, oop value);
596 static bool has_annotation_default_field();
597 static oop annotation_default(oop method);
598 static void set_annotation_default(oop method, oop value);
600 // Debugging
601 friend class JavaClasses;
602 };
605 // Interface to java.lang.reflect.Constructor objects
607 class java_lang_reflect_Constructor : public java_lang_reflect_AccessibleObject {
608 private:
609 // Note that to reduce dependencies on the JDK we compute these
610 // offsets at run-time.
611 static int clazz_offset;
612 static int parameterTypes_offset;
613 static int exceptionTypes_offset;
614 static int slot_offset;
615 static int modifiers_offset;
616 static int signature_offset;
617 static int annotations_offset;
618 static int parameter_annotations_offset;
620 static void compute_offsets();
622 public:
623 // Allocation
624 static Handle create(TRAPS);
626 // Accessors
627 static oop clazz(oop reflect);
628 static void set_clazz(oop reflect, oop value);
630 static oop parameter_types(oop constructor);
631 static void set_parameter_types(oop constructor, oop value);
633 static oop exception_types(oop constructor);
634 static void set_exception_types(oop constructor, oop value);
636 static int slot(oop reflect);
637 static void set_slot(oop reflect, int value);
639 static int modifiers(oop constructor);
640 static void set_modifiers(oop constructor, int value);
642 static bool has_signature_field();
643 static oop signature(oop constructor);
644 static void set_signature(oop constructor, oop value);
646 static bool has_annotations_field();
647 static oop annotations(oop constructor);
648 static void set_annotations(oop constructor, oop value);
650 static bool has_parameter_annotations_field();
651 static oop parameter_annotations(oop method);
652 static void set_parameter_annotations(oop method, oop value);
654 // Debugging
655 friend class JavaClasses;
656 };
659 // Interface to java.lang.reflect.Field objects
661 class java_lang_reflect_Field : public java_lang_reflect_AccessibleObject {
662 private:
663 // Note that to reduce dependencies on the JDK we compute these
664 // offsets at run-time.
665 static int clazz_offset;
666 static int name_offset;
667 static int type_offset;
668 static int slot_offset;
669 static int modifiers_offset;
670 static int signature_offset;
671 static int annotations_offset;
673 static void compute_offsets();
675 public:
676 // Allocation
677 static Handle create(TRAPS);
679 // Accessors
680 static oop clazz(oop reflect);
681 static void set_clazz(oop reflect, oop value);
683 static oop name(oop field);
684 static void set_name(oop field, oop value);
686 static oop type(oop field);
687 static void set_type(oop field, oop value);
689 static int slot(oop reflect);
690 static void set_slot(oop reflect, int value);
692 static int modifiers(oop field);
693 static void set_modifiers(oop field, int value);
695 static bool has_signature_field();
696 static oop signature(oop constructor);
697 static void set_signature(oop constructor, oop value);
699 static bool has_annotations_field();
700 static oop annotations(oop constructor);
701 static void set_annotations(oop constructor, oop value);
703 static bool has_parameter_annotations_field();
704 static oop parameter_annotations(oop method);
705 static void set_parameter_annotations(oop method, oop value);
707 static bool has_annotation_default_field();
708 static oop annotation_default(oop method);
709 static void set_annotation_default(oop method, oop value);
711 // Debugging
712 friend class JavaClasses;
713 };
715 // Interface to sun.reflect.ConstantPool objects
716 class sun_reflect_ConstantPool {
717 private:
718 // Note that to reduce dependencies on the JDK we compute these
719 // offsets at run-time.
720 static int _oop_offset;
722 static void compute_offsets();
724 public:
725 // Allocation
726 static Handle create(TRAPS);
728 // Accessors
729 static void set_cp(oop reflect, ConstantPool* value);
730 static int oop_offset() {
731 return _oop_offset;
732 }
734 static ConstantPool* get_cp(oop reflect);
736 // Debugging
737 friend class JavaClasses;
738 };
740 // Interface to sun.reflect.UnsafeStaticFieldAccessorImpl objects
741 class sun_reflect_UnsafeStaticFieldAccessorImpl {
742 private:
743 static int _base_offset;
744 static void compute_offsets();
746 public:
747 static int base_offset() {
748 return _base_offset;
749 }
751 // Debugging
752 friend class JavaClasses;
753 };
755 // Interface to java.lang primitive type boxing objects:
756 // - java.lang.Boolean
757 // - java.lang.Character
758 // - java.lang.Float
759 // - java.lang.Double
760 // - java.lang.Byte
761 // - java.lang.Short
762 // - java.lang.Integer
763 // - java.lang.Long
765 // This could be separated out into 8 individual classes.
767 class java_lang_boxing_object: AllStatic {
768 private:
769 enum {
770 hc_value_offset = 0
771 };
772 static int value_offset;
773 static int long_value_offset;
775 static oop initialize_and_allocate(BasicType type, TRAPS);
776 public:
777 // Allocation. Returns a boxed value, or NULL for invalid type.
778 static oop create(BasicType type, jvalue* value, TRAPS);
779 // Accessors. Returns the basic type being boxed, or T_ILLEGAL for invalid oop.
780 static BasicType get_value(oop box, jvalue* value);
781 static BasicType set_value(oop box, jvalue* value);
782 static BasicType basic_type(oop box);
783 static bool is_instance(oop box) { return basic_type(box) != T_ILLEGAL; }
784 static bool is_instance(oop box, BasicType type) { return basic_type(box) == type; }
785 static void print(oop box, outputStream* st) { jvalue value; print(get_value(box, &value), &value, st); }
786 static void print(BasicType type, jvalue* value, outputStream* st);
788 static int value_offset_in_bytes(BasicType type) {
789 return ( type == T_LONG || type == T_DOUBLE ) ? long_value_offset :
790 value_offset;
791 }
793 // Debugging
794 friend class JavaClasses;
795 };
799 // Interface to java.lang.ref.Reference objects
801 class java_lang_ref_Reference: AllStatic {
802 public:
803 enum {
804 hc_referent_offset = 0,
805 hc_queue_offset = 1,
806 hc_next_offset = 2,
807 hc_discovered_offset = 3 // Is not last, see SoftRefs.
808 };
809 enum {
810 hc_static_lock_offset = 0,
811 hc_static_pending_offset = 1
812 };
814 static int referent_offset;
815 static int queue_offset;
816 static int next_offset;
817 static int discovered_offset;
818 static int static_lock_offset;
819 static int static_pending_offset;
820 static int number_of_fake_oop_fields;
822 // Accessors
823 static oop referent(oop ref) {
824 return ref->obj_field(referent_offset);
825 }
826 static void set_referent(oop ref, oop value) {
827 ref->obj_field_put(referent_offset, value);
828 }
829 static void set_referent_raw(oop ref, oop value) {
830 ref->obj_field_put_raw(referent_offset, value);
831 }
832 static HeapWord* referent_addr(oop ref) {
833 return ref->obj_field_addr<HeapWord>(referent_offset);
834 }
835 static oop next(oop ref) {
836 return ref->obj_field(next_offset);
837 }
838 static void set_next(oop ref, oop value) {
839 ref->obj_field_put(next_offset, value);
840 }
841 static void set_next_raw(oop ref, oop value) {
842 ref->obj_field_put_raw(next_offset, value);
843 }
844 static HeapWord* next_addr(oop ref) {
845 return ref->obj_field_addr<HeapWord>(next_offset);
846 }
847 static oop discovered(oop ref) {
848 return ref->obj_field(discovered_offset);
849 }
850 static void set_discovered(oop ref, oop value) {
851 ref->obj_field_put(discovered_offset, value);
852 }
853 static void set_discovered_raw(oop ref, oop value) {
854 ref->obj_field_put_raw(discovered_offset, value);
855 }
856 static HeapWord* discovered_addr(oop ref) {
857 return ref->obj_field_addr<HeapWord>(discovered_offset);
858 }
859 // Accessors for statics
860 static oop pending_list_lock();
861 static oop pending_list();
863 static HeapWord* pending_list_lock_addr();
864 static HeapWord* pending_list_addr();
865 };
868 // Interface to java.lang.ref.SoftReference objects
870 class java_lang_ref_SoftReference: public java_lang_ref_Reference {
871 public:
872 enum {
873 // The timestamp is a long field and may need to be adjusted for alignment.
874 hc_timestamp_offset = hc_discovered_offset + 1
875 };
876 enum {
877 hc_static_clock_offset = 0
878 };
880 static int timestamp_offset;
881 static int static_clock_offset;
883 // Accessors
884 static jlong timestamp(oop ref);
886 // Accessors for statics
887 static jlong clock();
888 static void set_clock(jlong value);
889 };
892 // Interface to java.lang.invoke.MethodHandle objects
894 class MethodHandleEntry;
896 class java_lang_invoke_MethodHandle: AllStatic {
897 friend class JavaClasses;
899 private:
900 static int _type_offset; // the MethodType of this MH
901 static int _form_offset; // the LambdaForm of this MH
903 static void compute_offsets();
905 public:
906 // Accessors
907 static oop type(oop mh);
908 static void set_type(oop mh, oop mtype);
910 static oop form(oop mh);
911 static void set_form(oop mh, oop lform);
913 // Testers
914 static bool is_subclass(Klass* klass) {
915 return klass->is_subclass_of(SystemDictionary::MethodHandle_klass());
916 }
917 static bool is_instance(oop obj) {
918 return obj != NULL && is_subclass(obj->klass());
919 }
921 // Accessors for code generation:
922 static int type_offset_in_bytes() { return _type_offset; }
923 static int form_offset_in_bytes() { return _form_offset; }
924 };
926 // Interface to java.lang.invoke.LambdaForm objects
927 // (These are a private interface for managing adapter code generation.)
929 class java_lang_invoke_LambdaForm: AllStatic {
930 friend class JavaClasses;
932 private:
933 static int _vmentry_offset; // type is MemberName
935 static void compute_offsets();
937 public:
938 // Accessors
939 static oop vmentry(oop lform);
940 static void set_vmentry(oop lform, oop invoker);
942 // Testers
943 static bool is_subclass(Klass* klass) {
944 return SystemDictionary::LambdaForm_klass() != NULL &&
945 klass->is_subclass_of(SystemDictionary::LambdaForm_klass());
946 }
947 static bool is_instance(oop obj) {
948 return obj != NULL && is_subclass(obj->klass());
949 }
951 // Accessors for code generation:
952 static int vmentry_offset_in_bytes() { return _vmentry_offset; }
953 };
956 // Interface to java.lang.invoke.MemberName objects
957 // (These are a private interface for Java code to query the class hierarchy.)
959 #define MEMBERNAME_INJECTED_FIELDS(macro) \
960 macro(java_lang_invoke_MemberName, vmloader, object_signature, false) \
961 macro(java_lang_invoke_MemberName, vmindex, intptr_signature, false) \
962 macro(java_lang_invoke_MemberName, vmtarget, intptr_signature, false)
964 class java_lang_invoke_MemberName: AllStatic {
965 friend class JavaClasses;
967 private:
968 // From java.lang.invoke.MemberName:
969 // private Class<?> clazz; // class in which the method is defined
970 // private String name; // may be null if not yet materialized
971 // private Object type; // may be null if not yet materialized
972 // private int flags; // modifier bits; see reflect.Modifier
973 // private intptr vmtarget; // VM-specific target value
974 // private intptr_t vmindex; // member index within class or interface
975 static int _clazz_offset;
976 static int _name_offset;
977 static int _type_offset;
978 static int _flags_offset;
979 static int _vmtarget_offset;
980 static int _vmloader_offset;
981 static int _vmindex_offset;
983 static void compute_offsets();
985 public:
986 // Accessors
987 static oop clazz(oop mname);
988 static void set_clazz(oop mname, oop clazz);
990 static oop type(oop mname);
991 static void set_type(oop mname, oop type);
993 static oop name(oop mname);
994 static void set_name(oop mname, oop name);
996 static int flags(oop mname);
997 static void set_flags(oop mname, int flags);
999 static Metadata* vmtarget(oop mname);
1000 static void set_vmtarget(oop mname, Metadata* target);
1002 static intptr_t vmindex(oop mname);
1003 static void set_vmindex(oop mname, intptr_t index);
1005 // Testers
1006 static bool is_subclass(Klass* klass) {
1007 return klass->is_subclass_of(SystemDictionary::MemberName_klass());
1008 }
1009 static bool is_instance(oop obj) {
1010 return obj != NULL && is_subclass(obj->klass());
1011 }
1013 // Relevant integer codes (keep these in synch. with MethodHandleNatives.Constants):
1014 enum {
1015 MN_IS_METHOD = 0x00010000, // method (not constructor)
1016 MN_IS_CONSTRUCTOR = 0x00020000, // constructor
1017 MN_IS_FIELD = 0x00040000, // field
1018 MN_IS_TYPE = 0x00080000, // nested type
1019 MN_REFERENCE_KIND_SHIFT = 24, // refKind
1020 MN_REFERENCE_KIND_MASK = 0x0F000000 >> MN_REFERENCE_KIND_SHIFT,
1021 // The SEARCH_* bits are not for MN.flags but for the matchFlags argument of MHN.getMembers:
1022 MN_SEARCH_SUPERCLASSES = 0x00100000, // walk super classes
1023 MN_SEARCH_INTERFACES = 0x00200000 // walk implemented interfaces
1024 };
1026 // Accessors for code generation:
1027 static int clazz_offset_in_bytes() { return _clazz_offset; }
1028 static int type_offset_in_bytes() { return _type_offset; }
1029 static int name_offset_in_bytes() { return _name_offset; }
1030 static int flags_offset_in_bytes() { return _flags_offset; }
1031 static int vmtarget_offset_in_bytes() { return _vmtarget_offset; }
1032 static int vmindex_offset_in_bytes() { return _vmindex_offset; }
1033 };
1036 // Interface to java.lang.invoke.MethodType objects
1038 class java_lang_invoke_MethodType: AllStatic {
1039 friend class JavaClasses;
1041 private:
1042 static int _rtype_offset;
1043 static int _ptypes_offset;
1045 static void compute_offsets();
1047 public:
1048 // Accessors
1049 static oop rtype(oop mt);
1050 static objArrayOop ptypes(oop mt);
1052 static oop ptype(oop mt, int index);
1053 static int ptype_count(oop mt);
1055 static int ptype_slot_count(oop mt); // extra counts for long/double
1056 static int rtype_slot_count(oop mt); // extra counts for long/double
1058 static Symbol* as_signature(oop mt, bool intern_if_not_found, TRAPS);
1059 static void print_signature(oop mt, outputStream* st);
1061 static bool is_instance(oop obj) {
1062 return obj != NULL && obj->klass() == SystemDictionary::MethodType_klass();
1063 }
1065 static bool equals(oop mt1, oop mt2);
1067 // Accessors for code generation:
1068 static int rtype_offset_in_bytes() { return _rtype_offset; }
1069 static int ptypes_offset_in_bytes() { return _ptypes_offset; }
1070 };
1073 // Interface to java.lang.invoke.CallSite objects
1075 class java_lang_invoke_CallSite: AllStatic {
1076 friend class JavaClasses;
1078 private:
1079 static int _target_offset;
1081 static void compute_offsets();
1083 public:
1084 // Accessors
1085 static oop target( oop site) { return site->obj_field( _target_offset); }
1086 static void set_target( oop site, oop target) { site->obj_field_put( _target_offset, target); }
1088 static volatile oop target_volatile(oop site) { return site->obj_field_volatile( _target_offset); }
1089 static void set_target_volatile(oop site, oop target) { site->obj_field_put_volatile(_target_offset, target); }
1091 // Testers
1092 static bool is_subclass(Klass* klass) {
1093 return klass->is_subclass_of(SystemDictionary::CallSite_klass());
1094 }
1095 static bool is_instance(oop obj) {
1096 return obj != NULL && is_subclass(obj->klass());
1097 }
1099 // Accessors for code generation:
1100 static int target_offset_in_bytes() { return _target_offset; }
1101 };
1104 // Interface to java.security.AccessControlContext objects
1106 class java_security_AccessControlContext: AllStatic {
1107 private:
1108 // Note that for this class the layout changed between JDK1.2 and JDK1.3,
1109 // so we compute the offsets at startup rather than hard-wiring them.
1110 static int _context_offset;
1111 static int _privilegedContext_offset;
1112 static int _isPrivileged_offset;
1114 static void compute_offsets();
1115 public:
1116 static oop create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS);
1118 // Debugging/initialization
1119 friend class JavaClasses;
1120 };
1123 // Interface to java.lang.ClassLoader objects
1125 #define CLASSLOADER_INJECTED_FIELDS(macro) \
1126 macro(java_lang_ClassLoader, loader_data, intptr_signature, false) \
1127 macro(java_lang_ClassLoader, dependencies, object_signature, false)
1129 class java_lang_ClassLoader : AllStatic {
1130 private:
1131 // The fake offsets are added by the class loader when java.lang.Class is loaded
1132 enum {
1133 hc_parent_offset = 0
1134 };
1135 static int _loader_data_offset;
1136 static int _dependencies_offset;
1137 static bool offsets_computed;
1138 static int parent_offset;
1139 static int parallelCapable_offset;
1141 public:
1142 static void compute_offsets();
1144 static ClassLoaderData** loader_data_addr(oop loader);
1145 static ClassLoaderData* loader_data(oop loader);
1147 static oop dependencies(oop loader);
1148 static HeapWord* dependencies_addr(oop loader);
1150 static oop parent(oop loader);
1151 static bool isAncestor(oop loader, oop cl);
1153 // Support for parallelCapable field
1154 static bool parallelCapable(oop the_class_mirror);
1156 static bool is_trusted_loader(oop loader);
1158 // Fix for 4474172
1159 static oop non_reflection_class_loader(oop loader);
1161 // Testers
1162 static bool is_subclass(Klass* klass) {
1163 return klass->is_subclass_of(SystemDictionary::ClassLoader_klass());
1164 }
1165 static bool is_instance(oop obj) {
1166 return obj != NULL && is_subclass(obj->klass());
1167 }
1169 // Debugging
1170 friend class JavaClasses;
1171 friend class ClassFileParser; // access to number_of_fake_fields
1172 };
1175 // Interface to java.lang.System objects
1177 class java_lang_System : AllStatic {
1178 private:
1179 enum {
1180 hc_static_in_offset = 0,
1181 hc_static_out_offset = 1,
1182 hc_static_err_offset = 2
1183 };
1185 static int static_in_offset;
1186 static int static_out_offset;
1187 static int static_err_offset;
1189 public:
1190 static int in_offset_in_bytes();
1191 static int out_offset_in_bytes();
1192 static int err_offset_in_bytes();
1194 // Debugging
1195 friend class JavaClasses;
1196 };
1199 // Interface to java.lang.StackTraceElement objects
1201 class java_lang_StackTraceElement: AllStatic {
1202 private:
1203 enum {
1204 hc_declaringClass_offset = 0,
1205 hc_methodName_offset = 1,
1206 hc_fileName_offset = 2,
1207 hc_lineNumber_offset = 3
1208 };
1210 static int declaringClass_offset;
1211 static int methodName_offset;
1212 static int fileName_offset;
1213 static int lineNumber_offset;
1215 public:
1216 // Setters
1217 static void set_declaringClass(oop element, oop value);
1218 static void set_methodName(oop element, oop value);
1219 static void set_fileName(oop element, oop value);
1220 static void set_lineNumber(oop element, int value);
1222 // Create an instance of StackTraceElement
1223 static oop create(methodHandle m, int bci, TRAPS);
1225 // Debugging
1226 friend class JavaClasses;
1227 };
1230 // Interface to java.lang.AssertionStatusDirectives objects
1232 class java_lang_AssertionStatusDirectives: AllStatic {
1233 private:
1234 enum {
1235 hc_classes_offset,
1236 hc_classEnabled_offset,
1237 hc_packages_offset,
1238 hc_packageEnabled_offset,
1239 hc_deflt_offset
1240 };
1242 static int classes_offset;
1243 static int classEnabled_offset;
1244 static int packages_offset;
1245 static int packageEnabled_offset;
1246 static int deflt_offset;
1248 public:
1249 // Setters
1250 static void set_classes(oop obj, oop val);
1251 static void set_classEnabled(oop obj, oop val);
1252 static void set_packages(oop obj, oop val);
1253 static void set_packageEnabled(oop obj, oop val);
1254 static void set_deflt(oop obj, bool val);
1255 // Debugging
1256 friend class JavaClasses;
1257 };
1260 class java_nio_Buffer: AllStatic {
1261 private:
1262 static int _limit_offset;
1264 public:
1265 static int limit_offset();
1266 static void compute_offsets();
1267 };
1269 class java_util_concurrent_locks_AbstractOwnableSynchronizer : AllStatic {
1270 private:
1271 static int _owner_offset;
1272 public:
1273 static void initialize(TRAPS);
1274 static oop get_owner_threadObj(oop obj);
1275 };
1277 // Use to declare fields that need to be injected into Java classes
1278 // for the JVM to use. The name_index and signature_index are
1279 // declared in vmSymbols. The may_be_java flag is used to declare
1280 // fields that might already exist in Java but should be injected if
1281 // they don't. Otherwise the field is unconditionally injected and
1282 // the JVM uses the injected one. This is to ensure that name
1283 // collisions don't occur. In general may_be_java should be false
1284 // unless there's a good reason.
1286 class InjectedField {
1287 public:
1288 const SystemDictionary::WKID klass_id;
1289 const vmSymbols::SID name_index;
1290 const vmSymbols::SID signature_index;
1291 const bool may_be_java;
1294 Klass* klass() const { return SystemDictionary::well_known_klass(klass_id); }
1295 Symbol* name() const { return lookup_symbol(name_index); }
1296 Symbol* signature() const { return lookup_symbol(signature_index); }
1298 int compute_offset();
1300 // Find the Symbol for this index
1301 static Symbol* lookup_symbol(int symbol_index) {
1302 return vmSymbols::symbol_at((vmSymbols::SID)symbol_index);
1303 }
1304 };
1306 #define DECLARE_INJECTED_FIELD_ENUM(klass, name, signature, may_be_java) \
1307 klass##_##name##_enum,
1309 #define ALL_INJECTED_FIELDS(macro) \
1310 CLASS_INJECTED_FIELDS(macro) \
1311 CLASSLOADER_INJECTED_FIELDS(macro) \
1312 MEMBERNAME_INJECTED_FIELDS(macro)
1314 // Interface to hard-coded offset checking
1316 class JavaClasses : AllStatic {
1317 private:
1319 static InjectedField _injected_fields[];
1321 static bool check_offset(const char *klass_name, int offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1322 static bool check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1323 static bool check_constant(const char *klass_name, int constant, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1325 public:
1326 enum InjectedFieldID {
1327 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD_ENUM)
1328 MAX_enum
1329 };
1331 static int compute_injected_offset(InjectedFieldID id);
1333 static void compute_hard_coded_offsets();
1334 static void compute_offsets();
1335 static void check_offsets() PRODUCT_RETURN;
1337 static InjectedField* get_injected(Symbol* class_name, int* field_count);
1338 };
1340 #undef DECLARE_INJECTED_FIELD_ENUM
1342 #endif // SHARE_VM_CLASSFILE_JAVACLASSES_HPP