Thu, 01 Sep 2011 01:31:25 -0700
7079673: JSR 292: C1 should inline bytecoded method handle adapters
Reviewed-by: never
1 /*
2 * Copyright (c) 1997, 2011, 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 enum {
56 hc_value_offset = 0,
57 hc_offset_offset = 1
58 //hc_count_offset = 2 -- not a word-scaled offset
59 //hc_hash_offset = 3 -- not a word-scaled offset
60 };
62 static int value_offset;
63 static int offset_offset;
64 static int count_offset;
65 static int hash_offset;
67 static Handle basic_create(int length, bool tenured, TRAPS);
68 static Handle basic_create_from_unicode(jchar* unicode, int length, bool tenured, TRAPS);
70 static void set_value( oop string, typeArrayOop buffer) { string->obj_field_put(value_offset, (oop)buffer); }
71 static void set_offset(oop string, int offset) { string->int_field_put(offset_offset, offset); }
72 static void set_count( oop string, int count) { string->int_field_put(count_offset, count); }
74 public:
75 // Instance creation
76 static Handle create_from_unicode(jchar* unicode, int len, TRAPS);
77 static Handle create_tenured_from_unicode(jchar* unicode, int len, TRAPS);
78 static oop create_oop_from_unicode(jchar* unicode, int len, TRAPS);
79 static Handle create_from_str(const char* utf8_str, TRAPS);
80 static oop create_oop_from_str(const char* utf8_str, TRAPS);
81 static Handle create_from_symbol(Symbol* symbol, TRAPS);
82 static Handle create_from_platform_dependent_str(const char* str, TRAPS);
83 static Handle char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS);
85 static int value_offset_in_bytes() { return value_offset; }
86 static int count_offset_in_bytes() { return count_offset; }
87 static int offset_offset_in_bytes() { return offset_offset; }
88 static int hash_offset_in_bytes() { return hash_offset; }
90 // Accessors
91 static typeArrayOop value(oop java_string) {
92 assert(is_instance(java_string), "must be java_string");
93 return (typeArrayOop) java_string->obj_field(value_offset);
94 }
95 static int offset(oop java_string) {
96 assert(is_instance(java_string), "must be java_string");
97 return java_string->int_field(offset_offset);
98 }
99 static int length(oop java_string) {
100 assert(is_instance(java_string), "must be java_string");
101 return java_string->int_field(count_offset);
102 }
103 static int utf8_length(oop java_string);
105 // String converters
106 static char* as_utf8_string(oop java_string);
107 static char* as_utf8_string(oop java_string, char* buf, int buflen);
108 static char* as_utf8_string(oop java_string, int start, int len);
109 static char* as_platform_dependent_str(Handle java_string, TRAPS);
110 static jchar* as_unicode_string(oop java_string, int& length);
112 // Compute the hash value for a java.lang.String object which would
113 // contain the characters passed in. This hash value is used for at
114 // least two purposes.
115 //
116 // (a) As the hash value used by the StringTable for bucket selection
117 // and comparison (stored in the HashtableEntry structures). This
118 // is used in the String.intern() method.
119 //
120 // (b) As the hash value used by the String object itself, in
121 // String.hashCode(). This value is normally calculate in Java code
122 // in the String.hashCode method(), but is precomputed for String
123 // objects in the shared archive file.
124 //
125 // For this reason, THIS ALGORITHM MUST MATCH String.hashCode().
126 static unsigned int hash_string(jchar* s, int len) {
127 unsigned int h = 0;
128 while (len-- > 0) {
129 h = 31*h + (unsigned int) *s;
130 s++;
131 }
132 return h;
133 }
134 static unsigned int hash_string(oop java_string);
136 static bool equals(oop java_string, jchar* chars, int len);
138 // Conversion between '.' and '/' formats
139 static Handle externalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '/', '.', THREAD); }
140 static Handle internalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '.', '/', THREAD); }
142 // Conversion
143 static Symbol* as_symbol(Handle java_string, TRAPS);
144 static Symbol* as_symbol_or_null(oop java_string);
146 // Testers
147 static bool is_instance(oop obj) {
148 return obj != NULL && obj->klass() == SystemDictionary::String_klass();
149 }
151 // Debugging
152 static void print(Handle java_string, outputStream* st);
153 friend class JavaClasses;
154 };
157 // Interface to java.lang.Class objects
159 class java_lang_Class : AllStatic {
160 friend class VMStructs;
161 private:
162 // The fake offsets are added by the class loader when java.lang.Class is loaded
164 enum {
165 hc_number_of_fake_oop_fields = 3,
166 hc_number_of_fake_int_fields = 2
167 };
169 static int klass_offset;
170 static int resolved_constructor_offset;
171 static int array_klass_offset;
172 static int number_of_fake_oop_fields;
174 static int oop_size_offset;
175 static int static_oop_field_count_offset;
177 static void compute_offsets();
178 static bool offsets_computed;
179 static int classRedefinedCount_offset;
180 static int parallelCapable_offset;
182 public:
183 // Instance creation
184 static oop create_mirror(KlassHandle k, TRAPS);
185 static void fixup_mirror(KlassHandle k, TRAPS);
186 static oop create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS);
187 // Conversion
188 static klassOop as_klassOop(oop java_class);
189 static BasicType as_BasicType(oop java_class, klassOop* reference_klass = NULL);
190 static BasicType as_BasicType(oop java_class, KlassHandle* reference_klass) {
191 klassOop refk_oop = NULL;
192 BasicType result = as_BasicType(java_class, &refk_oop);
193 (*reference_klass) = KlassHandle(refk_oop);
194 return result;
195 }
196 static Symbol* as_signature(oop java_class, bool intern_if_not_found, TRAPS);
197 static void print_signature(oop java_class, outputStream *st);
198 // Testing
199 static bool is_instance(oop obj) {
200 return obj != NULL && obj->klass() == SystemDictionary::Class_klass();
201 }
202 static bool is_primitive(oop java_class);
203 static BasicType primitive_type(oop java_class);
204 static oop primitive_mirror(BasicType t);
205 // JVM_NewInstance support
206 static methodOop resolved_constructor(oop java_class);
207 static void set_resolved_constructor(oop java_class, methodOop constructor);
208 // JVM_NewArray support
209 static klassOop array_klass(oop java_class);
210 static void set_array_klass(oop java_class, klassOop klass);
211 // compiler support for class operations
212 static int klass_offset_in_bytes() { return klass_offset; }
213 static int resolved_constructor_offset_in_bytes() { return resolved_constructor_offset; }
214 static int array_klass_offset_in_bytes() { return array_klass_offset; }
215 // Support for classRedefinedCount field
216 static int classRedefinedCount(oop the_class_mirror);
217 static void set_classRedefinedCount(oop the_class_mirror, int value);
218 // Support for parallelCapable field
219 static bool parallelCapable(oop the_class_mirror);
221 static int oop_size(oop java_class);
222 static void set_oop_size(oop java_class, int size);
223 static int static_oop_field_count(oop java_class);
224 static void set_static_oop_field_count(oop java_class, int size);
226 // Debugging
227 friend class JavaClasses;
228 friend class instanceKlass; // verification code accesses offsets
229 friend class ClassFileParser; // access to number_of_fake_fields
230 };
232 // Interface to java.lang.Thread objects
234 class java_lang_Thread : AllStatic {
235 private:
236 // Note that for this class the layout changed between JDK1.2 and JDK1.3,
237 // so we compute the offsets at startup rather than hard-wiring them.
238 static int _name_offset;
239 static int _group_offset;
240 static int _contextClassLoader_offset;
241 static int _inheritedAccessControlContext_offset;
242 static int _priority_offset;
243 static int _eetop_offset;
244 static int _daemon_offset;
245 static int _stillborn_offset;
246 static int _stackSize_offset;
247 static int _tid_offset;
248 static int _thread_status_offset;
249 static int _park_blocker_offset;
250 static int _park_event_offset ;
252 static void compute_offsets();
254 public:
255 // Instance creation
256 static oop create();
257 // Returns the JavaThread associated with the thread obj
258 static JavaThread* thread(oop java_thread);
259 // Set JavaThread for instance
260 static void set_thread(oop java_thread, JavaThread* thread);
261 // Name
262 static typeArrayOop name(oop java_thread);
263 static void set_name(oop java_thread, typeArrayOop name);
264 // Priority
265 static ThreadPriority priority(oop java_thread);
266 static void set_priority(oop java_thread, ThreadPriority priority);
267 // Thread group
268 static oop threadGroup(oop java_thread);
269 // Stillborn
270 static bool is_stillborn(oop java_thread);
271 static void set_stillborn(oop java_thread);
272 // Alive (NOTE: this is not really a field, but provides the correct
273 // definition without doing a Java call)
274 static bool is_alive(oop java_thread);
275 // Daemon
276 static bool is_daemon(oop java_thread);
277 static void set_daemon(oop java_thread);
278 // Context ClassLoader
279 static oop context_class_loader(oop java_thread);
280 // Control context
281 static oop inherited_access_control_context(oop java_thread);
282 // Stack size hint
283 static jlong stackSize(oop java_thread);
284 // Thread ID
285 static jlong thread_id(oop java_thread);
287 // Blocker object responsible for thread parking
288 static oop park_blocker(oop java_thread);
290 // Pointer to type-stable park handler, encoded as jlong.
291 // Should be set when apparently null
292 // For details, see unsafe.cpp Unsafe_Unpark
293 static jlong park_event(oop java_thread);
294 static bool set_park_event(oop java_thread, jlong ptr);
296 // Java Thread Status for JVMTI and M&M use.
297 // This thread status info is saved in threadStatus field of
298 // java.lang.Thread java class.
299 enum ThreadStatus {
300 NEW = 0,
301 RUNNABLE = JVMTI_THREAD_STATE_ALIVE + // runnable / running
302 JVMTI_THREAD_STATE_RUNNABLE,
303 SLEEPING = JVMTI_THREAD_STATE_ALIVE + // Thread.sleep()
304 JVMTI_THREAD_STATE_WAITING +
305 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
306 JVMTI_THREAD_STATE_SLEEPING,
307 IN_OBJECT_WAIT = JVMTI_THREAD_STATE_ALIVE + // Object.wait()
308 JVMTI_THREAD_STATE_WAITING +
309 JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
310 JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
311 IN_OBJECT_WAIT_TIMED = JVMTI_THREAD_STATE_ALIVE + // Object.wait(long)
312 JVMTI_THREAD_STATE_WAITING +
313 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
314 JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
315 PARKED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park()
316 JVMTI_THREAD_STATE_WAITING +
317 JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
318 JVMTI_THREAD_STATE_PARKED,
319 PARKED_TIMED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park(long)
320 JVMTI_THREAD_STATE_WAITING +
321 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
322 JVMTI_THREAD_STATE_PARKED,
323 BLOCKED_ON_MONITOR_ENTER = JVMTI_THREAD_STATE_ALIVE + // (re-)entering a synchronization block
324 JVMTI_THREAD_STATE_BLOCKED_ON_MONITOR_ENTER,
325 TERMINATED = JVMTI_THREAD_STATE_TERMINATED
326 };
327 // Write thread status info to threadStatus field of java.lang.Thread.
328 static void set_thread_status(oop java_thread_oop, ThreadStatus status);
329 // Read thread status info from threadStatus field of java.lang.Thread.
330 static ThreadStatus get_thread_status(oop java_thread_oop);
332 static const char* thread_status_name(oop java_thread_oop);
334 // Debugging
335 friend class JavaClasses;
336 };
338 // Interface to java.lang.ThreadGroup objects
340 class java_lang_ThreadGroup : AllStatic {
341 private:
342 static int _parent_offset;
343 static int _name_offset;
344 static int _threads_offset;
345 static int _groups_offset;
346 static int _maxPriority_offset;
347 static int _destroyed_offset;
348 static int _daemon_offset;
349 static int _vmAllowSuspension_offset;
350 static int _nthreads_offset;
351 static int _ngroups_offset;
353 static void compute_offsets();
355 public:
356 // parent ThreadGroup
357 static oop parent(oop java_thread_group);
358 // name
359 static typeArrayOop name(oop java_thread_group);
360 // ("name as oop" accessor is not necessary)
361 // Number of threads in group
362 static int nthreads(oop java_thread_group);
363 // threads
364 static objArrayOop threads(oop java_thread_group);
365 // Number of threads in group
366 static int ngroups(oop java_thread_group);
367 // groups
368 static objArrayOop groups(oop java_thread_group);
369 // maxPriority in group
370 static ThreadPriority maxPriority(oop java_thread_group);
371 // Destroyed
372 static bool is_destroyed(oop java_thread_group);
373 // Daemon
374 static bool is_daemon(oop java_thread_group);
375 // vmAllowSuspension
376 static bool is_vmAllowSuspension(oop java_thread_group);
377 // Debugging
378 friend class JavaClasses;
379 };
383 // Interface to java.lang.Throwable objects
385 class java_lang_Throwable: AllStatic {
386 friend class BacktraceBuilder;
388 private:
389 // Offsets
390 enum {
391 hc_backtrace_offset = 0,
392 hc_detailMessage_offset = 1,
393 hc_cause_offset = 2, // New since 1.4
394 hc_stackTrace_offset = 3 // New since 1.4
395 };
396 enum {
397 hc_static_unassigned_stacktrace_offset = 0 // New since 1.7
398 };
399 // Trace constants
400 enum {
401 trace_methods_offset = 0,
402 trace_bcis_offset = 1,
403 trace_next_offset = 2,
404 trace_size = 3,
405 trace_chunk_size = 32
406 };
408 static int backtrace_offset;
409 static int detailMessage_offset;
410 static int cause_offset;
411 static int stackTrace_offset;
412 static int static_unassigned_stacktrace_offset;
414 // Printing
415 static char* print_stack_element_to_buffer(methodOop method, int bci);
416 static void print_to_stream(Handle stream, const char* str);
417 // StackTrace (programmatic access, new since 1.4)
418 static void clear_stacktrace(oop throwable);
419 // No stack trace available
420 static const char* no_stack_trace_message();
421 // Stacktrace (post JDK 1.7.0 to allow immutability protocol to be followed)
422 static void set_stacktrace(oop throwable, oop st_element_array);
423 static oop unassigned_stacktrace();
425 public:
426 // Backtrace
427 static oop backtrace(oop throwable);
428 static void set_backtrace(oop throwable, oop value);
429 // Needed by JVMTI to filter out this internal field.
430 static int get_backtrace_offset() { return backtrace_offset;}
431 static int get_detailMessage_offset() { return detailMessage_offset;}
432 // Message
433 static oop message(oop throwable);
434 static oop message(Handle throwable);
435 static void set_message(oop throwable, oop value);
436 // Print stack trace stored in exception by call-back to Java
437 // Note: this is no longer used in Merlin, but we still suppport
438 // it for compatibility.
439 static void print_stack_trace(oop throwable, oop print_stream);
440 static void print_stack_element(Handle stream, methodOop method, int bci);
441 static void print_stack_element(outputStream *st, methodOop method, int bci);
442 static void print_stack_usage(Handle stream);
444 // Allocate space for backtrace (created but stack trace not filled in)
445 static void allocate_backtrace(Handle throwable, TRAPS);
446 // Fill in current stack trace for throwable with preallocated backtrace (no GC)
447 static void fill_in_stack_trace_of_preallocated_backtrace(Handle throwable);
448 // Fill in current stack trace, can cause GC
449 static void fill_in_stack_trace(Handle throwable, methodHandle method, TRAPS);
450 static void fill_in_stack_trace(Handle throwable, methodHandle method = methodHandle());
451 // Programmatic access to stack trace
452 static oop get_stack_trace_element(oop throwable, int index, TRAPS);
453 static int get_stack_trace_depth(oop throwable, TRAPS);
454 // Printing
455 static void print(oop throwable, outputStream* st);
456 static void print(Handle throwable, outputStream* st);
457 static void print_stack_trace(oop throwable, outputStream* st);
458 // Debugging
459 friend class JavaClasses;
460 };
463 // Interface to java.lang.reflect.AccessibleObject objects
465 class java_lang_reflect_AccessibleObject: AllStatic {
466 private:
467 // Note that to reduce dependencies on the JDK we compute these
468 // offsets at run-time.
469 static int override_offset;
471 static void compute_offsets();
473 public:
474 // Accessors
475 static jboolean override(oop reflect);
476 static void set_override(oop reflect, jboolean value);
478 // Debugging
479 friend class JavaClasses;
480 };
483 // Interface to java.lang.reflect.Method objects
485 class java_lang_reflect_Method : public java_lang_reflect_AccessibleObject {
486 private:
487 // Note that to reduce dependencies on the JDK we compute these
488 // offsets at run-time.
489 static int clazz_offset;
490 static int name_offset;
491 static int returnType_offset;
492 static int parameterTypes_offset;
493 static int exceptionTypes_offset;
494 static int slot_offset;
495 static int modifiers_offset;
496 static int signature_offset;
497 static int annotations_offset;
498 static int parameter_annotations_offset;
499 static int annotation_default_offset;
501 static void compute_offsets();
503 public:
504 // Allocation
505 static Handle create(TRAPS);
507 // Accessors
508 static oop clazz(oop reflect);
509 static void set_clazz(oop reflect, oop value);
511 static oop name(oop method);
512 static void set_name(oop method, oop value);
514 static oop return_type(oop method);
515 static void set_return_type(oop method, oop value);
517 static oop parameter_types(oop method);
518 static void set_parameter_types(oop method, oop value);
520 static oop exception_types(oop method);
521 static void set_exception_types(oop method, oop value);
523 static int slot(oop reflect);
524 static void set_slot(oop reflect, int value);
526 static int modifiers(oop method);
527 static void set_modifiers(oop method, int value);
529 static bool has_signature_field();
530 static oop signature(oop method);
531 static void set_signature(oop method, oop value);
533 static bool has_annotations_field();
534 static oop annotations(oop method);
535 static void set_annotations(oop method, oop value);
537 static bool has_parameter_annotations_field();
538 static oop parameter_annotations(oop method);
539 static void set_parameter_annotations(oop method, oop value);
541 static bool has_annotation_default_field();
542 static oop annotation_default(oop method);
543 static void set_annotation_default(oop method, oop value);
545 // Debugging
546 friend class JavaClasses;
547 };
550 // Interface to java.lang.reflect.Constructor objects
552 class java_lang_reflect_Constructor : public java_lang_reflect_AccessibleObject {
553 private:
554 // Note that to reduce dependencies on the JDK we compute these
555 // offsets at run-time.
556 static int clazz_offset;
557 static int parameterTypes_offset;
558 static int exceptionTypes_offset;
559 static int slot_offset;
560 static int modifiers_offset;
561 static int signature_offset;
562 static int annotations_offset;
563 static int parameter_annotations_offset;
565 static void compute_offsets();
567 public:
568 // Allocation
569 static Handle create(TRAPS);
571 // Accessors
572 static oop clazz(oop reflect);
573 static void set_clazz(oop reflect, oop value);
575 static oop parameter_types(oop constructor);
576 static void set_parameter_types(oop constructor, oop value);
578 static oop exception_types(oop constructor);
579 static void set_exception_types(oop constructor, oop value);
581 static int slot(oop reflect);
582 static void set_slot(oop reflect, int value);
584 static int modifiers(oop constructor);
585 static void set_modifiers(oop constructor, int value);
587 static bool has_signature_field();
588 static oop signature(oop constructor);
589 static void set_signature(oop constructor, oop value);
591 static bool has_annotations_field();
592 static oop annotations(oop constructor);
593 static void set_annotations(oop constructor, oop value);
595 static bool has_parameter_annotations_field();
596 static oop parameter_annotations(oop method);
597 static void set_parameter_annotations(oop method, oop value);
599 // Debugging
600 friend class JavaClasses;
601 };
604 // Interface to java.lang.reflect.Field objects
606 class java_lang_reflect_Field : public java_lang_reflect_AccessibleObject {
607 private:
608 // Note that to reduce dependencies on the JDK we compute these
609 // offsets at run-time.
610 static int clazz_offset;
611 static int name_offset;
612 static int type_offset;
613 static int slot_offset;
614 static int modifiers_offset;
615 static int signature_offset;
616 static int annotations_offset;
618 static void compute_offsets();
620 public:
621 // Allocation
622 static Handle create(TRAPS);
624 // Accessors
625 static oop clazz(oop reflect);
626 static void set_clazz(oop reflect, oop value);
628 static oop name(oop field);
629 static void set_name(oop field, oop value);
631 static oop type(oop field);
632 static void set_type(oop field, oop value);
634 static int slot(oop reflect);
635 static void set_slot(oop reflect, int value);
637 static int modifiers(oop field);
638 static void set_modifiers(oop field, int value);
640 static bool has_signature_field();
641 static oop signature(oop constructor);
642 static void set_signature(oop constructor, oop value);
644 static bool has_annotations_field();
645 static oop annotations(oop constructor);
646 static void set_annotations(oop constructor, oop value);
648 static bool has_parameter_annotations_field();
649 static oop parameter_annotations(oop method);
650 static void set_parameter_annotations(oop method, oop value);
652 static bool has_annotation_default_field();
653 static oop annotation_default(oop method);
654 static void set_annotation_default(oop method, oop value);
656 // Debugging
657 friend class JavaClasses;
658 };
660 // Interface to sun.reflect.ConstantPool objects
661 class sun_reflect_ConstantPool {
662 private:
663 // Note that to reduce dependencies on the JDK we compute these
664 // offsets at run-time.
665 static int _cp_oop_offset;
667 static void compute_offsets();
669 public:
670 // Allocation
671 static Handle create(TRAPS);
673 // Accessors
674 static oop cp_oop(oop reflect);
675 static void set_cp_oop(oop reflect, oop value);
676 static int cp_oop_offset() {
677 return _cp_oop_offset;
678 }
680 // Debugging
681 friend class JavaClasses;
682 };
684 // Interface to sun.reflect.UnsafeStaticFieldAccessorImpl objects
685 class sun_reflect_UnsafeStaticFieldAccessorImpl {
686 private:
687 static int _base_offset;
688 static void compute_offsets();
690 public:
691 static int base_offset() {
692 return _base_offset;
693 }
695 // Debugging
696 friend class JavaClasses;
697 };
699 // Interface to java.lang primitive type boxing objects:
700 // - java.lang.Boolean
701 // - java.lang.Character
702 // - java.lang.Float
703 // - java.lang.Double
704 // - java.lang.Byte
705 // - java.lang.Short
706 // - java.lang.Integer
707 // - java.lang.Long
709 // This could be separated out into 8 individual classes.
711 class java_lang_boxing_object: AllStatic {
712 private:
713 enum {
714 hc_value_offset = 0
715 };
716 static int value_offset;
717 static int long_value_offset;
719 static oop initialize_and_allocate(BasicType type, TRAPS);
720 public:
721 // Allocation. Returns a boxed value, or NULL for invalid type.
722 static oop create(BasicType type, jvalue* value, TRAPS);
723 // Accessors. Returns the basic type being boxed, or T_ILLEGAL for invalid oop.
724 static BasicType get_value(oop box, jvalue* value);
725 static BasicType set_value(oop box, jvalue* value);
726 static BasicType basic_type(oop box);
727 static bool is_instance(oop box) { return basic_type(box) != T_ILLEGAL; }
728 static bool is_instance(oop box, BasicType type) { return basic_type(box) == type; }
729 static void print(oop box, outputStream* st) { jvalue value; print(get_value(box, &value), &value, st); }
730 static void print(BasicType type, jvalue* value, outputStream* st);
732 static int value_offset_in_bytes(BasicType type) {
733 return ( type == T_LONG || type == T_DOUBLE ) ? long_value_offset :
734 value_offset;
735 }
737 // Debugging
738 friend class JavaClasses;
739 };
743 // Interface to java.lang.ref.Reference objects
745 class java_lang_ref_Reference: AllStatic {
746 public:
747 enum {
748 hc_referent_offset = 0,
749 hc_queue_offset = 1,
750 hc_next_offset = 2,
751 hc_discovered_offset = 3 // Is not last, see SoftRefs.
752 };
753 enum {
754 hc_static_lock_offset = 0,
755 hc_static_pending_offset = 1
756 };
758 static int referent_offset;
759 static int queue_offset;
760 static int next_offset;
761 static int discovered_offset;
762 static int static_lock_offset;
763 static int static_pending_offset;
764 static int number_of_fake_oop_fields;
766 // Accessors
767 static oop referent(oop ref) {
768 return ref->obj_field(referent_offset);
769 }
770 static void set_referent(oop ref, oop value) {
771 ref->obj_field_put(referent_offset, value);
772 }
773 static void set_referent_raw(oop ref, oop value) {
774 ref->obj_field_raw_put(referent_offset, value);
775 }
776 static HeapWord* referent_addr(oop ref) {
777 return ref->obj_field_addr<HeapWord>(referent_offset);
778 }
779 static oop next(oop ref) {
780 return ref->obj_field(next_offset);
781 }
782 static void set_next(oop ref, oop value) {
783 ref->obj_field_put(next_offset, value);
784 }
785 static void set_next_raw(oop ref, oop value) {
786 ref->obj_field_raw_put(next_offset, value);
787 }
788 static HeapWord* next_addr(oop ref) {
789 return ref->obj_field_addr<HeapWord>(next_offset);
790 }
791 static oop discovered(oop ref) {
792 return ref->obj_field(discovered_offset);
793 }
794 static void set_discovered(oop ref, oop value) {
795 ref->obj_field_put(discovered_offset, value);
796 }
797 static void set_discovered_raw(oop ref, oop value) {
798 ref->obj_field_raw_put(discovered_offset, value);
799 }
800 static HeapWord* discovered_addr(oop ref) {
801 return ref->obj_field_addr<HeapWord>(discovered_offset);
802 }
803 // Accessors for statics
804 static oop pending_list_lock();
805 static oop pending_list();
807 static HeapWord* pending_list_addr();
808 };
811 // Interface to java.lang.ref.SoftReference objects
813 class java_lang_ref_SoftReference: public java_lang_ref_Reference {
814 public:
815 enum {
816 // The timestamp is a long field and may need to be adjusted for alignment.
817 hc_timestamp_offset = hc_discovered_offset + 1
818 };
819 enum {
820 hc_static_clock_offset = 0
821 };
823 static int timestamp_offset;
824 static int static_clock_offset;
826 // Accessors
827 static jlong timestamp(oop ref);
829 // Accessors for statics
830 static jlong clock();
831 static void set_clock(jlong value);
832 };
835 // Interface to java.lang.invoke.MethodHandle objects
837 class MethodHandleEntry;
839 class java_lang_invoke_MethodHandle: AllStatic {
840 friend class JavaClasses;
842 private:
843 static int _vmentry_offset; // assembly code trampoline for MH
844 static int _vmtarget_offset; // class-specific target reference
845 static int _type_offset; // the MethodType of this MH
846 static int _vmslots_offset; // OPTIONAL hoisted type.form.vmslots
848 static void compute_offsets();
850 public:
851 // Accessors
852 static oop type(oop mh);
853 static void set_type(oop mh, oop mtype);
855 static oop vmtarget(oop mh);
856 static void set_vmtarget(oop mh, oop target);
858 static MethodHandleEntry* vmentry(oop mh);
859 static void set_vmentry(oop mh, MethodHandleEntry* data);
861 static int vmslots(oop mh);
862 static void init_vmslots(oop mh);
863 static int compute_vmslots(oop mh);
865 // Testers
866 static bool is_subclass(klassOop klass) {
867 return Klass::cast(klass)->is_subclass_of(SystemDictionary::MethodHandle_klass());
868 }
869 static bool is_instance(oop obj) {
870 return obj != NULL && is_subclass(obj->klass());
871 }
873 // Accessors for code generation:
874 static int type_offset_in_bytes() { return _type_offset; }
875 static int vmtarget_offset_in_bytes() { return _vmtarget_offset; }
876 static int vmentry_offset_in_bytes() { return _vmentry_offset; }
877 static int vmslots_offset_in_bytes() { return _vmslots_offset; }
878 };
880 class java_lang_invoke_DirectMethodHandle: public java_lang_invoke_MethodHandle {
881 friend class JavaClasses;
883 private:
884 // _vmtarget_offset; // method or class or interface
885 static int _vmindex_offset; // negative or vtable idx or itable idx
886 static void compute_offsets();
888 public:
889 // Accessors
890 static int vmindex(oop mh);
891 static void set_vmindex(oop mh, int index);
893 // Testers
894 static bool is_subclass(klassOop klass) {
895 return Klass::cast(klass)->is_subclass_of(SystemDictionary::DirectMethodHandle_klass());
896 }
897 static bool is_instance(oop obj) {
898 return obj != NULL && is_subclass(obj->klass());
899 }
901 // Accessors for code generation:
902 static int vmindex_offset_in_bytes() { return _vmindex_offset; }
903 };
905 class java_lang_invoke_BoundMethodHandle: public java_lang_invoke_MethodHandle {
906 friend class JavaClasses;
908 private:
909 static int _argument_offset; // argument value bound into this MH
910 static int _vmargslot_offset; // relevant argument slot (<= vmslots)
911 static void compute_offsets();
913 public:
914 static oop argument(oop mh);
915 static void set_argument(oop mh, oop ref);
917 static jint vmargslot(oop mh);
918 static void set_vmargslot(oop mh, jint slot);
920 // Testers
921 static bool is_subclass(klassOop klass) {
922 return Klass::cast(klass)->is_subclass_of(SystemDictionary::BoundMethodHandle_klass());
923 }
924 static bool is_instance(oop obj) {
925 return obj != NULL && is_subclass(obj->klass());
926 }
928 static int argument_offset_in_bytes() { return _argument_offset; }
929 static int vmargslot_offset_in_bytes() { return _vmargslot_offset; }
930 };
932 class java_lang_invoke_AdapterMethodHandle: public java_lang_invoke_BoundMethodHandle {
933 friend class JavaClasses;
935 private:
936 static int _conversion_offset; // type of conversion to apply
937 static void compute_offsets();
939 public:
940 static int conversion(oop mh);
941 static void set_conversion(oop mh, int conv);
943 // Testers
944 static bool is_subclass(klassOop klass) {
945 return Klass::cast(klass)->is_subclass_of(SystemDictionary::AdapterMethodHandle_klass());
946 }
947 static bool is_instance(oop obj) {
948 return obj != NULL && is_subclass(obj->klass());
949 }
951 // Relevant integer codes (keep these in synch. with MethodHandleNatives.Constants):
952 enum {
953 OP_RETYPE_ONLY = 0x0, // no argument changes; straight retype
954 OP_RETYPE_RAW = 0x1, // straight retype, trusted (void->int, Object->T)
955 OP_CHECK_CAST = 0x2, // ref-to-ref conversion; requires a Class argument
956 OP_PRIM_TO_PRIM = 0x3, // converts from one primitive to another
957 OP_REF_TO_PRIM = 0x4, // unboxes a wrapper to produce a primitive
958 OP_PRIM_TO_REF = 0x5, // boxes a primitive into a wrapper
959 OP_SWAP_ARGS = 0x6, // swap arguments (vminfo is 2nd arg)
960 OP_ROT_ARGS = 0x7, // rotate arguments (vminfo is displaced arg)
961 OP_DUP_ARGS = 0x8, // duplicates one or more arguments (at TOS)
962 OP_DROP_ARGS = 0x9, // remove one or more argument slots
963 OP_COLLECT_ARGS = 0xA, // combine arguments using an auxiliary function
964 OP_SPREAD_ARGS = 0xB, // expand in place a varargs array (of known size)
965 OP_FOLD_ARGS = 0xC, // combine but do not remove arguments; prepend result
966 //OP_UNUSED_13 = 0xD, // unused code, perhaps for reified argument lists
967 CONV_OP_LIMIT = 0xE, // limit of CONV_OP enumeration
969 CONV_OP_MASK = 0xF00, // this nybble contains the conversion op field
970 CONV_TYPE_MASK = 0x0F, // fits T_ADDRESS and below
971 CONV_VMINFO_MASK = 0x0FF, // LSB is reserved for JVM use
972 CONV_VMINFO_SHIFT = 0, // position of bits in CONV_VMINFO_MASK
973 CONV_OP_SHIFT = 8, // position of bits in CONV_OP_MASK
974 CONV_DEST_TYPE_SHIFT = 12, // byte 2 has the adapter BasicType (if needed)
975 CONV_SRC_TYPE_SHIFT = 16, // byte 2 has the source BasicType (if needed)
976 CONV_STACK_MOVE_SHIFT = 20, // high 12 bits give signed SP change
977 CONV_STACK_MOVE_MASK = (1 << (32 - CONV_STACK_MOVE_SHIFT)) - 1
978 };
980 static int conversion_offset_in_bytes() { return _conversion_offset; }
981 };
984 // Interface to java.lang.invoke.MemberName objects
985 // (These are a private interface for Java code to query the class hierarchy.)
987 class java_lang_invoke_MemberName: AllStatic {
988 friend class JavaClasses;
990 private:
991 // From java.lang.invoke.MemberName:
992 // private Class<?> clazz; // class in which the method is defined
993 // private String name; // may be null if not yet materialized
994 // private Object type; // may be null if not yet materialized
995 // private int flags; // modifier bits; see reflect.Modifier
996 // private Object vmtarget; // VM-specific target value
997 // private int vmindex; // method index within class or interface
998 static int _clazz_offset;
999 static int _name_offset;
1000 static int _type_offset;
1001 static int _flags_offset;
1002 static int _vmtarget_offset;
1003 static int _vmindex_offset;
1005 static void compute_offsets();
1007 public:
1008 // Accessors
1009 static oop clazz(oop mname);
1010 static void set_clazz(oop mname, oop clazz);
1012 static oop type(oop mname);
1013 static void set_type(oop mname, oop type);
1015 static oop name(oop mname);
1016 static void set_name(oop mname, oop name);
1018 static int flags(oop mname);
1019 static void set_flags(oop mname, int flags);
1021 static int modifiers(oop mname) { return (u2) flags(mname); }
1022 static void set_modifiers(oop mname, int mods)
1023 { set_flags(mname, (flags(mname) &~ (u2)-1) | (u2)mods); }
1025 static oop vmtarget(oop mname);
1026 static void set_vmtarget(oop mname, oop target);
1028 static int vmindex(oop mname);
1029 static void set_vmindex(oop mname, int index);
1031 // Testers
1032 static bool is_subclass(klassOop klass) {
1033 return Klass::cast(klass)->is_subclass_of(SystemDictionary::MemberName_klass());
1034 }
1035 static bool is_instance(oop obj) {
1036 return obj != NULL && is_subclass(obj->klass());
1037 }
1039 // Relevant integer codes (keep these in synch. with MethodHandleNatives.Constants):
1040 enum {
1041 MN_IS_METHOD = 0x00010000, // method (not constructor)
1042 MN_IS_CONSTRUCTOR = 0x00020000, // constructor
1043 MN_IS_FIELD = 0x00040000, // field
1044 MN_IS_TYPE = 0x00080000, // nested type
1045 MN_SEARCH_SUPERCLASSES = 0x00100000, // for MHN.getMembers
1046 MN_SEARCH_INTERFACES = 0x00200000, // for MHN.getMembers
1047 VM_INDEX_UNINITIALIZED = -99
1048 };
1050 // Accessors for code generation:
1051 static int clazz_offset_in_bytes() { return _clazz_offset; }
1052 static int type_offset_in_bytes() { return _type_offset; }
1053 static int name_offset_in_bytes() { return _name_offset; }
1054 static int flags_offset_in_bytes() { return _flags_offset; }
1055 static int vmtarget_offset_in_bytes() { return _vmtarget_offset; }
1056 static int vmindex_offset_in_bytes() { return _vmindex_offset; }
1057 };
1060 // Interface to java.lang.invoke.MethodType objects
1062 class java_lang_invoke_MethodType: AllStatic {
1063 friend class JavaClasses;
1065 private:
1066 static int _rtype_offset;
1067 static int _ptypes_offset;
1068 static int _form_offset;
1070 static void compute_offsets();
1072 public:
1073 // Accessors
1074 static oop rtype(oop mt);
1075 static objArrayOop ptypes(oop mt);
1076 static oop form(oop mt);
1078 static oop ptype(oop mt, int index);
1079 static int ptype_count(oop mt);
1081 static Symbol* as_signature(oop mt, bool intern_if_not_found, TRAPS);
1082 static void print_signature(oop mt, outputStream* st);
1084 static bool is_instance(oop obj) {
1085 return obj != NULL && obj->klass() == SystemDictionary::MethodType_klass();
1086 }
1088 static bool equals(oop mt1, oop mt2);
1090 // Accessors for code generation:
1091 static int rtype_offset_in_bytes() { return _rtype_offset; }
1092 static int ptypes_offset_in_bytes() { return _ptypes_offset; }
1093 static int form_offset_in_bytes() { return _form_offset; }
1094 };
1096 class java_lang_invoke_MethodTypeForm: AllStatic {
1097 friend class JavaClasses;
1099 private:
1100 static int _vmslots_offset; // number of argument slots needed
1101 static int _vmlayout_offset; // object describing internal calling sequence
1102 static int _erasedType_offset; // erasedType = canonical MethodType
1103 static int _genericInvoker_offset; // genericInvoker = adapter for invokeGeneric
1105 static void compute_offsets();
1107 public:
1108 // Accessors
1109 static int vmslots(oop mtform);
1110 static oop erasedType(oop mtform);
1111 static oop genericInvoker(oop mtform);
1113 static oop vmlayout(oop mtform);
1114 static oop init_vmlayout(oop mtform, oop cookie);
1116 // Accessors for code generation:
1117 static int vmslots_offset_in_bytes() { return _vmslots_offset; }
1118 static int vmlayout_offset_in_bytes() { return _vmlayout_offset; }
1119 static int erasedType_offset_in_bytes() { return _erasedType_offset; }
1120 static int genericInvoker_offset_in_bytes() { return _genericInvoker_offset; }
1121 };
1124 // Interface to java.lang.invoke.CallSite objects
1126 class java_lang_invoke_CallSite: AllStatic {
1127 friend class JavaClasses;
1129 private:
1130 static int _target_offset;
1131 static int _caller_method_offset;
1132 static int _caller_bci_offset;
1134 static void compute_offsets();
1136 public:
1137 // Accessors
1138 static oop target(oop site);
1139 static void set_target(oop site, oop target);
1141 static oop caller_method(oop site);
1142 static void set_caller_method(oop site, oop ref);
1144 static jint caller_bci(oop site);
1145 static void set_caller_bci(oop site, jint bci);
1147 // Testers
1148 static bool is_subclass(klassOop klass) {
1149 return Klass::cast(klass)->is_subclass_of(SystemDictionary::CallSite_klass());
1150 }
1151 static bool is_instance(oop obj) {
1152 return obj != NULL && is_subclass(obj->klass());
1153 }
1155 // Accessors for code generation:
1156 static int target_offset_in_bytes() { return _target_offset; }
1157 static int caller_method_offset_in_bytes() { return _caller_method_offset; }
1158 static int caller_bci_offset_in_bytes() { return _caller_bci_offset; }
1159 };
1162 // Interface to java.security.AccessControlContext objects
1164 class java_security_AccessControlContext: AllStatic {
1165 private:
1166 // Note that for this class the layout changed between JDK1.2 and JDK1.3,
1167 // so we compute the offsets at startup rather than hard-wiring them.
1168 static int _context_offset;
1169 static int _privilegedContext_offset;
1170 static int _isPrivileged_offset;
1172 static void compute_offsets();
1173 public:
1174 static oop create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS);
1176 // Debugging/initialization
1177 friend class JavaClasses;
1178 };
1181 // Interface to java.lang.ClassLoader objects
1183 class java_lang_ClassLoader : AllStatic {
1184 private:
1185 enum {
1186 hc_parent_offset = 0
1187 };
1189 static int parent_offset;
1191 public:
1192 static oop parent(oop loader);
1194 static bool is_trusted_loader(oop loader);
1196 // Fix for 4474172
1197 static oop non_reflection_class_loader(oop loader);
1199 // Debugging
1200 friend class JavaClasses;
1201 };
1204 // Interface to java.lang.System objects
1206 class java_lang_System : AllStatic {
1207 private:
1208 enum {
1209 hc_static_in_offset = 0,
1210 hc_static_out_offset = 1,
1211 hc_static_err_offset = 2
1212 };
1214 static int static_in_offset;
1215 static int static_out_offset;
1216 static int static_err_offset;
1218 public:
1219 static int in_offset_in_bytes();
1220 static int out_offset_in_bytes();
1221 static int err_offset_in_bytes();
1223 // Debugging
1224 friend class JavaClasses;
1225 };
1228 // Interface to java.lang.StackTraceElement objects
1230 class java_lang_StackTraceElement: AllStatic {
1231 private:
1232 enum {
1233 hc_declaringClass_offset = 0,
1234 hc_methodName_offset = 1,
1235 hc_fileName_offset = 2,
1236 hc_lineNumber_offset = 3
1237 };
1239 static int declaringClass_offset;
1240 static int methodName_offset;
1241 static int fileName_offset;
1242 static int lineNumber_offset;
1244 public:
1245 // Setters
1246 static void set_declaringClass(oop element, oop value);
1247 static void set_methodName(oop element, oop value);
1248 static void set_fileName(oop element, oop value);
1249 static void set_lineNumber(oop element, int value);
1251 // Create an instance of StackTraceElement
1252 static oop create(methodHandle m, int bci, TRAPS);
1254 // Debugging
1255 friend class JavaClasses;
1256 };
1259 // Interface to java.lang.AssertionStatusDirectives objects
1261 class java_lang_AssertionStatusDirectives: AllStatic {
1262 private:
1263 enum {
1264 hc_classes_offset,
1265 hc_classEnabled_offset,
1266 hc_packages_offset,
1267 hc_packageEnabled_offset,
1268 hc_deflt_offset
1269 };
1271 static int classes_offset;
1272 static int classEnabled_offset;
1273 static int packages_offset;
1274 static int packageEnabled_offset;
1275 static int deflt_offset;
1277 public:
1278 // Setters
1279 static void set_classes(oop obj, oop val);
1280 static void set_classEnabled(oop obj, oop val);
1281 static void set_packages(oop obj, oop val);
1282 static void set_packageEnabled(oop obj, oop val);
1283 static void set_deflt(oop obj, bool val);
1284 // Debugging
1285 friend class JavaClasses;
1286 };
1289 class java_nio_Buffer: AllStatic {
1290 private:
1291 static int _limit_offset;
1293 public:
1294 static int limit_offset();
1295 static void compute_offsets();
1296 };
1298 class sun_misc_AtomicLongCSImpl: AllStatic {
1299 private:
1300 static int _value_offset;
1302 public:
1303 static int value_offset();
1304 static void compute_offsets();
1305 };
1307 class java_util_concurrent_locks_AbstractOwnableSynchronizer : AllStatic {
1308 private:
1309 static int _owner_offset;
1310 public:
1311 static void initialize(TRAPS);
1312 static oop get_owner_threadObj(oop obj);
1313 };
1315 // Interface to hard-coded offset checking
1317 class JavaClasses : AllStatic {
1318 private:
1319 static bool check_offset(const char *klass_name, int offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1320 static bool check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1321 static bool check_constant(const char *klass_name, int constant, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1322 public:
1323 static void compute_hard_coded_offsets();
1324 static void compute_offsets();
1325 static void check_offsets() PRODUCT_RETURN;
1326 };
1328 #endif // SHARE_VM_CLASSFILE_JAVACLASSES_HPP