Thu, 13 Dec 2012 10:09:49 +0100
8004661: Comment and function name java_lang_String::toHash is wrong
Summary: renamed to hash_code
Reviewed-by: dholmes, coleenp, brutisso
Contributed-by: erik.helin@oracle.com
1 /*
2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
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);
157 // produce an ascii string with all other values quoted using \u####
158 static char* as_quoted_ascii(oop java_string);
160 // Compute the hash value for a java.lang.String object which would
161 // contain the characters passed in.
162 //
163 // As the hash value used by the String object itself, in
164 // String.hashCode(). This value is normally calculated in Java code
165 // in the String.hashCode method(), but is precomputed for String
166 // objects in the shared archive file.
167 // hash P(31) from Kernighan & Ritchie
168 //
169 // For this reason, THIS ALGORITHM MUST MATCH String.hashCode().
170 template <typename T> static unsigned int hash_code(T* s, int len) {
171 unsigned int h = 0;
172 while (len-- > 0) {
173 h = 31*h + (unsigned int) *s;
174 s++;
175 }
176 return h;
177 }
178 static unsigned int hash_code(oop java_string);
180 // This is the string hash code used by the StringTable, which may be
181 // the same as String.hashCode or an alternate hash code.
182 static unsigned int hash_string(oop java_string);
184 static bool equals(oop java_string, jchar* chars, int len);
186 // Conversion between '.' and '/' formats
187 static Handle externalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '/', '.', THREAD); }
188 static Handle internalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '.', '/', THREAD); }
190 // Conversion
191 static Symbol* as_symbol(Handle java_string, TRAPS);
192 static Symbol* as_symbol_or_null(oop java_string);
194 // Testers
195 static bool is_instance(oop obj) {
196 return obj != NULL && obj->klass() == SystemDictionary::String_klass();
197 }
199 // Debugging
200 static void print(Handle java_string, outputStream* st);
201 friend class JavaClasses;
202 };
205 // Interface to java.lang.Class objects
207 #define CLASS_INJECTED_FIELDS(macro) \
208 macro(java_lang_Class, klass, intptr_signature, false) \
209 macro(java_lang_Class, resolved_constructor, intptr_signature, false) \
210 macro(java_lang_Class, array_klass, intptr_signature, false) \
211 macro(java_lang_Class, oop_size, int_signature, false) \
212 macro(java_lang_Class, static_oop_field_count, int_signature, false)
214 class java_lang_Class : AllStatic {
215 friend class VMStructs;
217 private:
218 // The fake offsets are added by the class loader when java.lang.Class is loaded
220 static int _klass_offset;
221 static int _resolved_constructor_offset;
222 static int _array_klass_offset;
224 static int _oop_size_offset;
225 static int _static_oop_field_count_offset;
227 static bool offsets_computed;
228 static int classRedefinedCount_offset;
229 static GrowableArray<Klass*>* _fixup_mirror_list;
231 public:
232 static void compute_offsets();
234 // Instance creation
235 static oop create_mirror(KlassHandle k, TRAPS);
236 static void fixup_mirror(KlassHandle k, TRAPS);
237 static oop create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS);
238 // Conversion
239 static Klass* as_Klass(oop java_class);
240 static void set_klass(oop java_class, Klass* klass);
241 static BasicType as_BasicType(oop java_class, Klass** reference_klass = NULL);
242 static BasicType as_BasicType(oop java_class, KlassHandle* reference_klass) {
243 Klass* refk_oop = NULL;
244 BasicType result = as_BasicType(java_class, &refk_oop);
245 (*reference_klass) = KlassHandle(refk_oop);
246 return result;
247 }
248 static Symbol* as_signature(oop java_class, bool intern_if_not_found, TRAPS);
249 static void print_signature(oop java_class, outputStream *st);
250 // Testing
251 static bool is_instance(oop obj) {
252 return obj != NULL && obj->klass() == SystemDictionary::Class_klass();
253 }
254 static bool is_primitive(oop java_class);
255 static BasicType primitive_type(oop java_class);
256 static oop primitive_mirror(BasicType t);
257 // JVM_NewInstance support
258 static Method* resolved_constructor(oop java_class);
259 static void set_resolved_constructor(oop java_class, Method* constructor);
260 // JVM_NewArray support
261 static Klass* array_klass(oop java_class);
262 static void set_array_klass(oop java_class, Klass* klass);
263 // compiler support for class operations
264 static int klass_offset_in_bytes() { return _klass_offset; }
265 static int resolved_constructor_offset_in_bytes() { return _resolved_constructor_offset; }
266 static int array_klass_offset_in_bytes() { return _array_klass_offset; }
267 // Support for classRedefinedCount field
268 static int classRedefinedCount(oop the_class_mirror);
269 static void set_classRedefinedCount(oop the_class_mirror, int value);
271 static int oop_size(oop java_class);
272 static void set_oop_size(oop java_class, int size);
273 static int static_oop_field_count(oop java_class);
274 static void set_static_oop_field_count(oop java_class, int size);
276 static GrowableArray<Klass*>* fixup_mirror_list() {
277 return _fixup_mirror_list;
278 }
279 static void set_fixup_mirror_list(GrowableArray<Klass*>* v) {
280 _fixup_mirror_list = v;
281 }
282 // Debugging
283 friend class JavaClasses;
284 friend class InstanceKlass; // verification code accesses offsets
285 friend class ClassFileParser; // access to number_of_fake_fields
286 };
288 // Interface to java.lang.Thread objects
290 class java_lang_Thread : AllStatic {
291 private:
292 // Note that for this class the layout changed between JDK1.2 and JDK1.3,
293 // so we compute the offsets at startup rather than hard-wiring them.
294 static int _name_offset;
295 static int _group_offset;
296 static int _contextClassLoader_offset;
297 static int _inheritedAccessControlContext_offset;
298 static int _priority_offset;
299 static int _eetop_offset;
300 static int _daemon_offset;
301 static int _stillborn_offset;
302 static int _stackSize_offset;
303 static int _tid_offset;
304 static int _thread_status_offset;
305 static int _park_blocker_offset;
306 static int _park_event_offset ;
308 static void compute_offsets();
310 public:
311 // Instance creation
312 static oop create();
313 // Returns the JavaThread associated with the thread obj
314 static JavaThread* thread(oop java_thread);
315 // Set JavaThread for instance
316 static void set_thread(oop java_thread, JavaThread* thread);
317 // Name
318 static typeArrayOop name(oop java_thread);
319 static void set_name(oop java_thread, typeArrayOop name);
320 // Priority
321 static ThreadPriority priority(oop java_thread);
322 static void set_priority(oop java_thread, ThreadPriority priority);
323 // Thread group
324 static oop threadGroup(oop java_thread);
325 // Stillborn
326 static bool is_stillborn(oop java_thread);
327 static void set_stillborn(oop java_thread);
328 // Alive (NOTE: this is not really a field, but provides the correct
329 // definition without doing a Java call)
330 static bool is_alive(oop java_thread);
331 // Daemon
332 static bool is_daemon(oop java_thread);
333 static void set_daemon(oop java_thread);
334 // Context ClassLoader
335 static oop context_class_loader(oop java_thread);
336 // Control context
337 static oop inherited_access_control_context(oop java_thread);
338 // Stack size hint
339 static jlong stackSize(oop java_thread);
340 // Thread ID
341 static jlong thread_id(oop java_thread);
343 // Blocker object responsible for thread parking
344 static oop park_blocker(oop java_thread);
346 // Pointer to type-stable park handler, encoded as jlong.
347 // Should be set when apparently null
348 // For details, see unsafe.cpp Unsafe_Unpark
349 static jlong park_event(oop java_thread);
350 static bool set_park_event(oop java_thread, jlong ptr);
352 // Java Thread Status for JVMTI and M&M use.
353 // This thread status info is saved in threadStatus field of
354 // java.lang.Thread java class.
355 enum ThreadStatus {
356 NEW = 0,
357 RUNNABLE = JVMTI_THREAD_STATE_ALIVE + // runnable / running
358 JVMTI_THREAD_STATE_RUNNABLE,
359 SLEEPING = JVMTI_THREAD_STATE_ALIVE + // Thread.sleep()
360 JVMTI_THREAD_STATE_WAITING +
361 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
362 JVMTI_THREAD_STATE_SLEEPING,
363 IN_OBJECT_WAIT = JVMTI_THREAD_STATE_ALIVE + // Object.wait()
364 JVMTI_THREAD_STATE_WAITING +
365 JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
366 JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
367 IN_OBJECT_WAIT_TIMED = JVMTI_THREAD_STATE_ALIVE + // Object.wait(long)
368 JVMTI_THREAD_STATE_WAITING +
369 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
370 JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
371 PARKED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park()
372 JVMTI_THREAD_STATE_WAITING +
373 JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
374 JVMTI_THREAD_STATE_PARKED,
375 PARKED_TIMED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park(long)
376 JVMTI_THREAD_STATE_WAITING +
377 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
378 JVMTI_THREAD_STATE_PARKED,
379 BLOCKED_ON_MONITOR_ENTER = JVMTI_THREAD_STATE_ALIVE + // (re-)entering a synchronization block
380 JVMTI_THREAD_STATE_BLOCKED_ON_MONITOR_ENTER,
381 TERMINATED = JVMTI_THREAD_STATE_TERMINATED
382 };
383 // Write thread status info to threadStatus field of java.lang.Thread.
384 static void set_thread_status(oop java_thread_oop, ThreadStatus status);
385 // Read thread status info from threadStatus field of java.lang.Thread.
386 static ThreadStatus get_thread_status(oop java_thread_oop);
388 static const char* thread_status_name(oop java_thread_oop);
390 // Debugging
391 friend class JavaClasses;
392 };
394 // Interface to java.lang.ThreadGroup objects
396 class java_lang_ThreadGroup : AllStatic {
397 private:
398 static int _parent_offset;
399 static int _name_offset;
400 static int _threads_offset;
401 static int _groups_offset;
402 static int _maxPriority_offset;
403 static int _destroyed_offset;
404 static int _daemon_offset;
405 static int _vmAllowSuspension_offset;
406 static int _nthreads_offset;
407 static int _ngroups_offset;
409 static void compute_offsets();
411 public:
412 // parent ThreadGroup
413 static oop parent(oop java_thread_group);
414 // name
415 static typeArrayOop name(oop java_thread_group);
416 // ("name as oop" accessor is not necessary)
417 // Number of threads in group
418 static int nthreads(oop java_thread_group);
419 // threads
420 static objArrayOop threads(oop java_thread_group);
421 // Number of threads in group
422 static int ngroups(oop java_thread_group);
423 // groups
424 static objArrayOop groups(oop java_thread_group);
425 // maxPriority in group
426 static ThreadPriority maxPriority(oop java_thread_group);
427 // Destroyed
428 static bool is_destroyed(oop java_thread_group);
429 // Daemon
430 static bool is_daemon(oop java_thread_group);
431 // vmAllowSuspension
432 static bool is_vmAllowSuspension(oop java_thread_group);
433 // Debugging
434 friend class JavaClasses;
435 };
439 // Interface to java.lang.Throwable objects
441 class java_lang_Throwable: AllStatic {
442 friend class BacktraceBuilder;
444 private:
445 // Offsets
446 enum {
447 hc_backtrace_offset = 0,
448 hc_detailMessage_offset = 1,
449 hc_cause_offset = 2, // New since 1.4
450 hc_stackTrace_offset = 3 // New since 1.4
451 };
452 enum {
453 hc_static_unassigned_stacktrace_offset = 0 // New since 1.7
454 };
455 // Trace constants
456 enum {
457 trace_methods_offset = 0,
458 trace_bcis_offset = 1,
459 trace_mirrors_offset = 2,
460 trace_next_offset = 3,
461 trace_size = 4,
462 trace_chunk_size = 32
463 };
465 static int backtrace_offset;
466 static int detailMessage_offset;
467 static int cause_offset;
468 static int stackTrace_offset;
469 static int static_unassigned_stacktrace_offset;
471 // Printing
472 static char* print_stack_element_to_buffer(Method* method, int bci);
473 static void print_to_stream(Handle stream, const char* str);
474 // StackTrace (programmatic access, new since 1.4)
475 static void clear_stacktrace(oop throwable);
476 // No stack trace available
477 static const char* no_stack_trace_message();
478 // Stacktrace (post JDK 1.7.0 to allow immutability protocol to be followed)
479 static void set_stacktrace(oop throwable, oop st_element_array);
480 static oop unassigned_stacktrace();
482 public:
483 // Backtrace
484 static oop backtrace(oop throwable);
485 static void set_backtrace(oop throwable, oop value);
486 // Needed by JVMTI to filter out this internal field.
487 static int get_backtrace_offset() { return backtrace_offset;}
488 static int get_detailMessage_offset() { return detailMessage_offset;}
489 // Message
490 static oop message(oop throwable);
491 static oop message(Handle throwable);
492 static void set_message(oop throwable, oop value);
493 // Print stack trace stored in exception by call-back to Java
494 // Note: this is no longer used in Merlin, but we still suppport
495 // it for compatibility.
496 static void print_stack_trace(oop throwable, oop print_stream);
497 static void print_stack_element(Handle stream, Method* method, int bci);
498 static void print_stack_element(outputStream *st, Method* method, int bci);
499 static void print_stack_usage(Handle stream);
501 // Allocate space for backtrace (created but stack trace not filled in)
502 static void allocate_backtrace(Handle throwable, TRAPS);
503 // Fill in current stack trace for throwable with preallocated backtrace (no GC)
504 static void fill_in_stack_trace_of_preallocated_backtrace(Handle throwable);
505 // Fill in current stack trace, can cause GC
506 static void fill_in_stack_trace(Handle throwable, methodHandle method, TRAPS);
507 static void fill_in_stack_trace(Handle throwable, methodHandle method = methodHandle());
508 // Programmatic access to stack trace
509 static oop get_stack_trace_element(oop throwable, int index, TRAPS);
510 static int get_stack_trace_depth(oop throwable, TRAPS);
511 // Printing
512 static void print(oop throwable, outputStream* st);
513 static void print(Handle throwable, outputStream* st);
514 static void print_stack_trace(oop throwable, outputStream* st);
515 // Debugging
516 friend class JavaClasses;
517 };
520 // Interface to java.lang.reflect.AccessibleObject objects
522 class java_lang_reflect_AccessibleObject: AllStatic {
523 private:
524 // Note that to reduce dependencies on the JDK we compute these
525 // offsets at run-time.
526 static int override_offset;
528 static void compute_offsets();
530 public:
531 // Accessors
532 static jboolean override(oop reflect);
533 static void set_override(oop reflect, jboolean value);
535 // Debugging
536 friend class JavaClasses;
537 };
540 // Interface to java.lang.reflect.Method objects
542 class java_lang_reflect_Method : public java_lang_reflect_AccessibleObject {
543 private:
544 // Note that to reduce dependencies on the JDK we compute these
545 // offsets at run-time.
546 static int clazz_offset;
547 static int name_offset;
548 static int returnType_offset;
549 static int parameterTypes_offset;
550 static int exceptionTypes_offset;
551 static int slot_offset;
552 static int modifiers_offset;
553 static int signature_offset;
554 static int annotations_offset;
555 static int parameter_annotations_offset;
556 static int annotation_default_offset;
558 static void compute_offsets();
560 public:
561 // Allocation
562 static Handle create(TRAPS);
564 // Accessors
565 static oop clazz(oop reflect);
566 static void set_clazz(oop reflect, oop value);
568 static oop name(oop method);
569 static void set_name(oop method, oop value);
571 static oop return_type(oop method);
572 static void set_return_type(oop method, oop value);
574 static oop parameter_types(oop method);
575 static void set_parameter_types(oop method, oop value);
577 static oop exception_types(oop method);
578 static void set_exception_types(oop method, oop value);
580 static int slot(oop reflect);
581 static void set_slot(oop reflect, int value);
583 static int modifiers(oop method);
584 static void set_modifiers(oop method, int value);
586 static bool has_signature_field();
587 static oop signature(oop method);
588 static void set_signature(oop method, oop value);
590 static bool has_annotations_field();
591 static oop annotations(oop method);
592 static void set_annotations(oop method, oop value);
594 static bool has_parameter_annotations_field();
595 static oop parameter_annotations(oop method);
596 static void set_parameter_annotations(oop method, oop value);
598 static bool has_annotation_default_field();
599 static oop annotation_default(oop method);
600 static void set_annotation_default(oop method, oop value);
602 // Debugging
603 friend class JavaClasses;
604 };
607 // Interface to java.lang.reflect.Constructor objects
609 class java_lang_reflect_Constructor : public java_lang_reflect_AccessibleObject {
610 private:
611 // Note that to reduce dependencies on the JDK we compute these
612 // offsets at run-time.
613 static int clazz_offset;
614 static int parameterTypes_offset;
615 static int exceptionTypes_offset;
616 static int slot_offset;
617 static int modifiers_offset;
618 static int signature_offset;
619 static int annotations_offset;
620 static int parameter_annotations_offset;
622 static void compute_offsets();
624 public:
625 // Allocation
626 static Handle create(TRAPS);
628 // Accessors
629 static oop clazz(oop reflect);
630 static void set_clazz(oop reflect, oop value);
632 static oop parameter_types(oop constructor);
633 static void set_parameter_types(oop constructor, oop value);
635 static oop exception_types(oop constructor);
636 static void set_exception_types(oop constructor, oop value);
638 static int slot(oop reflect);
639 static void set_slot(oop reflect, int value);
641 static int modifiers(oop constructor);
642 static void set_modifiers(oop constructor, int value);
644 static bool has_signature_field();
645 static oop signature(oop constructor);
646 static void set_signature(oop constructor, oop value);
648 static bool has_annotations_field();
649 static oop annotations(oop constructor);
650 static void set_annotations(oop constructor, oop value);
652 static bool has_parameter_annotations_field();
653 static oop parameter_annotations(oop method);
654 static void set_parameter_annotations(oop method, oop value);
656 // Debugging
657 friend class JavaClasses;
658 };
661 // Interface to java.lang.reflect.Field objects
663 class java_lang_reflect_Field : public java_lang_reflect_AccessibleObject {
664 private:
665 // Note that to reduce dependencies on the JDK we compute these
666 // offsets at run-time.
667 static int clazz_offset;
668 static int name_offset;
669 static int type_offset;
670 static int slot_offset;
671 static int modifiers_offset;
672 static int signature_offset;
673 static int annotations_offset;
675 static void compute_offsets();
677 public:
678 // Allocation
679 static Handle create(TRAPS);
681 // Accessors
682 static oop clazz(oop reflect);
683 static void set_clazz(oop reflect, oop value);
685 static oop name(oop field);
686 static void set_name(oop field, oop value);
688 static oop type(oop field);
689 static void set_type(oop field, oop value);
691 static int slot(oop reflect);
692 static void set_slot(oop reflect, int value);
694 static int modifiers(oop field);
695 static void set_modifiers(oop field, int value);
697 static bool has_signature_field();
698 static oop signature(oop constructor);
699 static void set_signature(oop constructor, oop value);
701 static bool has_annotations_field();
702 static oop annotations(oop constructor);
703 static void set_annotations(oop constructor, oop value);
705 static bool has_parameter_annotations_field();
706 static oop parameter_annotations(oop method);
707 static void set_parameter_annotations(oop method, oop value);
709 static bool has_annotation_default_field();
710 static oop annotation_default(oop method);
711 static void set_annotation_default(oop method, oop value);
713 // Debugging
714 friend class JavaClasses;
715 };
717 // Interface to sun.reflect.ConstantPool objects
718 class sun_reflect_ConstantPool {
719 private:
720 // Note that to reduce dependencies on the JDK we compute these
721 // offsets at run-time.
722 static int _oop_offset;
724 static void compute_offsets();
726 public:
727 // Allocation
728 static Handle create(TRAPS);
730 // Accessors
731 static void set_cp(oop reflect, ConstantPool* value);
732 static int oop_offset() {
733 return _oop_offset;
734 }
736 static ConstantPool* get_cp(oop reflect);
738 // Debugging
739 friend class JavaClasses;
740 };
742 // Interface to sun.reflect.UnsafeStaticFieldAccessorImpl objects
743 class sun_reflect_UnsafeStaticFieldAccessorImpl {
744 private:
745 static int _base_offset;
746 static void compute_offsets();
748 public:
749 static int base_offset() {
750 return _base_offset;
751 }
753 // Debugging
754 friend class JavaClasses;
755 };
757 // Interface to java.lang primitive type boxing objects:
758 // - java.lang.Boolean
759 // - java.lang.Character
760 // - java.lang.Float
761 // - java.lang.Double
762 // - java.lang.Byte
763 // - java.lang.Short
764 // - java.lang.Integer
765 // - java.lang.Long
767 // This could be separated out into 8 individual classes.
769 class java_lang_boxing_object: AllStatic {
770 private:
771 enum {
772 hc_value_offset = 0
773 };
774 static int value_offset;
775 static int long_value_offset;
777 static oop initialize_and_allocate(BasicType type, TRAPS);
778 public:
779 // Allocation. Returns a boxed value, or NULL for invalid type.
780 static oop create(BasicType type, jvalue* value, TRAPS);
781 // Accessors. Returns the basic type being boxed, or T_ILLEGAL for invalid oop.
782 static BasicType get_value(oop box, jvalue* value);
783 static BasicType set_value(oop box, jvalue* value);
784 static BasicType basic_type(oop box);
785 static bool is_instance(oop box) { return basic_type(box) != T_ILLEGAL; }
786 static bool is_instance(oop box, BasicType type) { return basic_type(box) == type; }
787 static void print(oop box, outputStream* st) { jvalue value; print(get_value(box, &value), &value, st); }
788 static void print(BasicType type, jvalue* value, outputStream* st);
790 static int value_offset_in_bytes(BasicType type) {
791 return ( type == T_LONG || type == T_DOUBLE ) ? long_value_offset :
792 value_offset;
793 }
795 // Debugging
796 friend class JavaClasses;
797 };
801 // Interface to java.lang.ref.Reference objects
803 class java_lang_ref_Reference: AllStatic {
804 public:
805 enum {
806 hc_referent_offset = 0,
807 hc_queue_offset = 1,
808 hc_next_offset = 2,
809 hc_discovered_offset = 3 // Is not last, see SoftRefs.
810 };
811 enum {
812 hc_static_lock_offset = 0,
813 hc_static_pending_offset = 1
814 };
816 static int referent_offset;
817 static int queue_offset;
818 static int next_offset;
819 static int discovered_offset;
820 static int static_lock_offset;
821 static int static_pending_offset;
822 static int number_of_fake_oop_fields;
824 // Accessors
825 static oop referent(oop ref) {
826 return ref->obj_field(referent_offset);
827 }
828 static void set_referent(oop ref, oop value) {
829 ref->obj_field_put(referent_offset, value);
830 }
831 static void set_referent_raw(oop ref, oop value) {
832 ref->obj_field_put_raw(referent_offset, value);
833 }
834 static HeapWord* referent_addr(oop ref) {
835 return ref->obj_field_addr<HeapWord>(referent_offset);
836 }
837 static oop next(oop ref) {
838 return ref->obj_field(next_offset);
839 }
840 static void set_next(oop ref, oop value) {
841 ref->obj_field_put(next_offset, value);
842 }
843 static void set_next_raw(oop ref, oop value) {
844 ref->obj_field_put_raw(next_offset, value);
845 }
846 static HeapWord* next_addr(oop ref) {
847 return ref->obj_field_addr<HeapWord>(next_offset);
848 }
849 static oop discovered(oop ref) {
850 return ref->obj_field(discovered_offset);
851 }
852 static void set_discovered(oop ref, oop value) {
853 ref->obj_field_put(discovered_offset, value);
854 }
855 static void set_discovered_raw(oop ref, oop value) {
856 ref->obj_field_put_raw(discovered_offset, value);
857 }
858 static HeapWord* discovered_addr(oop ref) {
859 return ref->obj_field_addr<HeapWord>(discovered_offset);
860 }
861 // Accessors for statics
862 static oop pending_list_lock();
863 static oop pending_list();
865 static HeapWord* pending_list_lock_addr();
866 static HeapWord* pending_list_addr();
867 };
870 // Interface to java.lang.ref.SoftReference objects
872 class java_lang_ref_SoftReference: public java_lang_ref_Reference {
873 public:
874 enum {
875 // The timestamp is a long field and may need to be adjusted for alignment.
876 hc_timestamp_offset = hc_discovered_offset + 1
877 };
878 enum {
879 hc_static_clock_offset = 0
880 };
882 static int timestamp_offset;
883 static int static_clock_offset;
885 // Accessors
886 static jlong timestamp(oop ref);
888 // Accessors for statics
889 static jlong clock();
890 static void set_clock(jlong value);
891 };
894 // Interface to java.lang.invoke.MethodHandle objects
896 class MethodHandleEntry;
898 class java_lang_invoke_MethodHandle: AllStatic {
899 friend class JavaClasses;
901 private:
902 static int _type_offset; // the MethodType of this MH
903 static int _form_offset; // the LambdaForm of this MH
905 static void compute_offsets();
907 public:
908 // Accessors
909 static oop type(oop mh);
910 static void set_type(oop mh, oop mtype);
912 static oop form(oop mh);
913 static void set_form(oop mh, oop lform);
915 // Testers
916 static bool is_subclass(Klass* klass) {
917 return klass->is_subclass_of(SystemDictionary::MethodHandle_klass());
918 }
919 static bool is_instance(oop obj) {
920 return obj != NULL && is_subclass(obj->klass());
921 }
923 // Accessors for code generation:
924 static int type_offset_in_bytes() { return _type_offset; }
925 static int form_offset_in_bytes() { return _form_offset; }
926 };
928 // Interface to java.lang.invoke.LambdaForm objects
929 // (These are a private interface for managing adapter code generation.)
931 class java_lang_invoke_LambdaForm: AllStatic {
932 friend class JavaClasses;
934 private:
935 static int _vmentry_offset; // type is MemberName
937 static void compute_offsets();
939 public:
940 // Accessors
941 static oop vmentry(oop lform);
942 static void set_vmentry(oop lform, oop invoker);
944 // Testers
945 static bool is_subclass(Klass* klass) {
946 return SystemDictionary::LambdaForm_klass() != NULL &&
947 klass->is_subclass_of(SystemDictionary::LambdaForm_klass());
948 }
949 static bool is_instance(oop obj) {
950 return obj != NULL && is_subclass(obj->klass());
951 }
953 // Accessors for code generation:
954 static int vmentry_offset_in_bytes() { return _vmentry_offset; }
955 };
958 // Interface to java.lang.invoke.MemberName objects
959 // (These are a private interface for Java code to query the class hierarchy.)
961 #define MEMBERNAME_INJECTED_FIELDS(macro) \
962 macro(java_lang_invoke_MemberName, vmloader, object_signature, false) \
963 macro(java_lang_invoke_MemberName, vmindex, intptr_signature, false) \
964 macro(java_lang_invoke_MemberName, vmtarget, intptr_signature, false)
966 class java_lang_invoke_MemberName: AllStatic {
967 friend class JavaClasses;
969 private:
970 // From java.lang.invoke.MemberName:
971 // private Class<?> clazz; // class in which the method is defined
972 // private String name; // may be null if not yet materialized
973 // private Object type; // may be null if not yet materialized
974 // private int flags; // modifier bits; see reflect.Modifier
975 // private intptr vmtarget; // VM-specific target value
976 // private intptr_t vmindex; // member index within class or interface
977 static int _clazz_offset;
978 static int _name_offset;
979 static int _type_offset;
980 static int _flags_offset;
981 static int _vmtarget_offset;
982 static int _vmloader_offset;
983 static int _vmindex_offset;
985 static void compute_offsets();
987 public:
988 // Accessors
989 static oop clazz(oop mname);
990 static void set_clazz(oop mname, oop clazz);
992 static oop type(oop mname);
993 static void set_type(oop mname, oop type);
995 static oop name(oop mname);
996 static void set_name(oop mname, oop name);
998 static int flags(oop mname);
999 static void set_flags(oop mname, int flags);
1001 static Metadata* vmtarget(oop mname);
1002 static void set_vmtarget(oop mname, Metadata* target);
1004 static intptr_t vmindex(oop mname);
1005 static void set_vmindex(oop mname, intptr_t index);
1007 // Testers
1008 static bool is_subclass(Klass* klass) {
1009 return klass->is_subclass_of(SystemDictionary::MemberName_klass());
1010 }
1011 static bool is_instance(oop obj) {
1012 return obj != NULL && is_subclass(obj->klass());
1013 }
1015 // Relevant integer codes (keep these in synch. with MethodHandleNatives.Constants):
1016 enum {
1017 MN_IS_METHOD = 0x00010000, // method (not constructor)
1018 MN_IS_CONSTRUCTOR = 0x00020000, // constructor
1019 MN_IS_FIELD = 0x00040000, // field
1020 MN_IS_TYPE = 0x00080000, // nested type
1021 MN_REFERENCE_KIND_SHIFT = 24, // refKind
1022 MN_REFERENCE_KIND_MASK = 0x0F000000 >> MN_REFERENCE_KIND_SHIFT,
1023 // The SEARCH_* bits are not for MN.flags but for the matchFlags argument of MHN.getMembers:
1024 MN_SEARCH_SUPERCLASSES = 0x00100000, // walk super classes
1025 MN_SEARCH_INTERFACES = 0x00200000 // walk implemented interfaces
1026 };
1028 // Accessors for code generation:
1029 static int clazz_offset_in_bytes() { return _clazz_offset; }
1030 static int type_offset_in_bytes() { return _type_offset; }
1031 static int name_offset_in_bytes() { return _name_offset; }
1032 static int flags_offset_in_bytes() { return _flags_offset; }
1033 static int vmtarget_offset_in_bytes() { return _vmtarget_offset; }
1034 static int vmindex_offset_in_bytes() { return _vmindex_offset; }
1035 };
1038 // Interface to java.lang.invoke.MethodType objects
1040 class java_lang_invoke_MethodType: AllStatic {
1041 friend class JavaClasses;
1043 private:
1044 static int _rtype_offset;
1045 static int _ptypes_offset;
1047 static void compute_offsets();
1049 public:
1050 // Accessors
1051 static oop rtype(oop mt);
1052 static objArrayOop ptypes(oop mt);
1054 static oop ptype(oop mt, int index);
1055 static int ptype_count(oop mt);
1057 static int ptype_slot_count(oop mt); // extra counts for long/double
1058 static int rtype_slot_count(oop mt); // extra counts for long/double
1060 static Symbol* as_signature(oop mt, bool intern_if_not_found, TRAPS);
1061 static void print_signature(oop mt, outputStream* st);
1063 static bool is_instance(oop obj) {
1064 return obj != NULL && obj->klass() == SystemDictionary::MethodType_klass();
1065 }
1067 static bool equals(oop mt1, oop mt2);
1069 // Accessors for code generation:
1070 static int rtype_offset_in_bytes() { return _rtype_offset; }
1071 static int ptypes_offset_in_bytes() { return _ptypes_offset; }
1072 };
1075 // Interface to java.lang.invoke.CallSite objects
1077 class java_lang_invoke_CallSite: AllStatic {
1078 friend class JavaClasses;
1080 private:
1081 static int _target_offset;
1083 static void compute_offsets();
1085 public:
1086 // Accessors
1087 static oop target( oop site) { return site->obj_field( _target_offset); }
1088 static void set_target( oop site, oop target) { site->obj_field_put( _target_offset, target); }
1090 static volatile oop target_volatile(oop site) { return site->obj_field_volatile( _target_offset); }
1091 static void set_target_volatile(oop site, oop target) { site->obj_field_put_volatile(_target_offset, target); }
1093 // Testers
1094 static bool is_subclass(Klass* klass) {
1095 return klass->is_subclass_of(SystemDictionary::CallSite_klass());
1096 }
1097 static bool is_instance(oop obj) {
1098 return obj != NULL && is_subclass(obj->klass());
1099 }
1101 // Accessors for code generation:
1102 static int target_offset_in_bytes() { return _target_offset; }
1103 };
1106 // Interface to java.security.AccessControlContext objects
1108 class java_security_AccessControlContext: AllStatic {
1109 private:
1110 // Note that for this class the layout changed between JDK1.2 and JDK1.3,
1111 // so we compute the offsets at startup rather than hard-wiring them.
1112 static int _context_offset;
1113 static int _privilegedContext_offset;
1114 static int _isPrivileged_offset;
1116 static void compute_offsets();
1117 public:
1118 static oop create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS);
1120 // Debugging/initialization
1121 friend class JavaClasses;
1122 };
1125 // Interface to java.lang.ClassLoader objects
1127 #define CLASSLOADER_INJECTED_FIELDS(macro) \
1128 macro(java_lang_ClassLoader, loader_data, intptr_signature, false)
1130 class java_lang_ClassLoader : AllStatic {
1131 private:
1132 // The fake offsets are added by the class loader when java.lang.Class is loaded
1133 enum {
1134 hc_parent_offset = 0
1135 };
1136 static int _loader_data_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 parent(oop loader);
1148 static bool isAncestor(oop loader, oop cl);
1150 // Support for parallelCapable field
1151 static bool parallelCapable(oop the_class_mirror);
1153 static bool is_trusted_loader(oop loader);
1155 // Fix for 4474172
1156 static oop non_reflection_class_loader(oop loader);
1158 // Testers
1159 static bool is_subclass(Klass* klass) {
1160 return klass->is_subclass_of(SystemDictionary::ClassLoader_klass());
1161 }
1162 static bool is_instance(oop obj) {
1163 return obj != NULL && is_subclass(obj->klass());
1164 }
1166 // Debugging
1167 friend class JavaClasses;
1168 friend class ClassFileParser; // access to number_of_fake_fields
1169 };
1172 // Interface to java.lang.System objects
1174 class java_lang_System : AllStatic {
1175 private:
1176 enum {
1177 hc_static_in_offset = 0,
1178 hc_static_out_offset = 1,
1179 hc_static_err_offset = 2
1180 };
1182 static int static_in_offset;
1183 static int static_out_offset;
1184 static int static_err_offset;
1186 public:
1187 static int in_offset_in_bytes();
1188 static int out_offset_in_bytes();
1189 static int err_offset_in_bytes();
1191 // Debugging
1192 friend class JavaClasses;
1193 };
1196 // Interface to java.lang.StackTraceElement objects
1198 class java_lang_StackTraceElement: AllStatic {
1199 private:
1200 enum {
1201 hc_declaringClass_offset = 0,
1202 hc_methodName_offset = 1,
1203 hc_fileName_offset = 2,
1204 hc_lineNumber_offset = 3
1205 };
1207 static int declaringClass_offset;
1208 static int methodName_offset;
1209 static int fileName_offset;
1210 static int lineNumber_offset;
1212 public:
1213 // Setters
1214 static void set_declaringClass(oop element, oop value);
1215 static void set_methodName(oop element, oop value);
1216 static void set_fileName(oop element, oop value);
1217 static void set_lineNumber(oop element, int value);
1219 // Create an instance of StackTraceElement
1220 static oop create(methodHandle m, int bci, TRAPS);
1222 // Debugging
1223 friend class JavaClasses;
1224 };
1227 // Interface to java.lang.AssertionStatusDirectives objects
1229 class java_lang_AssertionStatusDirectives: AllStatic {
1230 private:
1231 enum {
1232 hc_classes_offset,
1233 hc_classEnabled_offset,
1234 hc_packages_offset,
1235 hc_packageEnabled_offset,
1236 hc_deflt_offset
1237 };
1239 static int classes_offset;
1240 static int classEnabled_offset;
1241 static int packages_offset;
1242 static int packageEnabled_offset;
1243 static int deflt_offset;
1245 public:
1246 // Setters
1247 static void set_classes(oop obj, oop val);
1248 static void set_classEnabled(oop obj, oop val);
1249 static void set_packages(oop obj, oop val);
1250 static void set_packageEnabled(oop obj, oop val);
1251 static void set_deflt(oop obj, bool val);
1252 // Debugging
1253 friend class JavaClasses;
1254 };
1257 class java_nio_Buffer: AllStatic {
1258 private:
1259 static int _limit_offset;
1261 public:
1262 static int limit_offset();
1263 static void compute_offsets();
1264 };
1266 class java_util_concurrent_locks_AbstractOwnableSynchronizer : AllStatic {
1267 private:
1268 static int _owner_offset;
1269 public:
1270 static void initialize(TRAPS);
1271 static oop get_owner_threadObj(oop obj);
1272 };
1274 // Use to declare fields that need to be injected into Java classes
1275 // for the JVM to use. The name_index and signature_index are
1276 // declared in vmSymbols. The may_be_java flag is used to declare
1277 // fields that might already exist in Java but should be injected if
1278 // they don't. Otherwise the field is unconditionally injected and
1279 // the JVM uses the injected one. This is to ensure that name
1280 // collisions don't occur. In general may_be_java should be false
1281 // unless there's a good reason.
1283 class InjectedField {
1284 public:
1285 const SystemDictionary::WKID klass_id;
1286 const vmSymbols::SID name_index;
1287 const vmSymbols::SID signature_index;
1288 const bool may_be_java;
1291 Klass* klass() const { return SystemDictionary::well_known_klass(klass_id); }
1292 Symbol* name() const { return lookup_symbol(name_index); }
1293 Symbol* signature() const { return lookup_symbol(signature_index); }
1295 int compute_offset();
1297 // Find the Symbol for this index
1298 static Symbol* lookup_symbol(int symbol_index) {
1299 return vmSymbols::symbol_at((vmSymbols::SID)symbol_index);
1300 }
1301 };
1303 #define DECLARE_INJECTED_FIELD_ENUM(klass, name, signature, may_be_java) \
1304 klass##_##name##_enum,
1306 #define ALL_INJECTED_FIELDS(macro) \
1307 CLASS_INJECTED_FIELDS(macro) \
1308 CLASSLOADER_INJECTED_FIELDS(macro) \
1309 MEMBERNAME_INJECTED_FIELDS(macro)
1311 // Interface to hard-coded offset checking
1313 class JavaClasses : AllStatic {
1314 private:
1316 static InjectedField _injected_fields[];
1318 static bool check_offset(const char *klass_name, int offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1319 static bool check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1320 static bool check_constant(const char *klass_name, int constant, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1322 public:
1323 enum InjectedFieldID {
1324 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD_ENUM)
1325 MAX_enum
1326 };
1328 static int compute_injected_offset(InjectedFieldID id);
1330 static void compute_hard_coded_offsets();
1331 static void compute_offsets();
1332 static void check_offsets() PRODUCT_RETURN;
1334 static InjectedField* get_injected(Symbol* class_name, int* field_count);
1335 };
1337 #undef DECLARE_INJECTED_FIELD_ENUM
1339 #endif // SHARE_VM_CLASSFILE_JAVACLASSES_HPP