1 /*
2 * Copyright 1997-2007 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24
25 # include "incls/_precompiled.incl"
26 # include "incls/_javaClasses.cpp.incl"
27
28 // Helpful macro for computing field offsets at run time rather than hardcoding them
29 #define COMPUTE_OFFSET(klass_name_as_C_str, dest_offset, klass_oop, name_symbol, signature_symbol) \
30 { \
31 fieldDescriptor fd; \
32 instanceKlass* ik = instanceKlass::cast(klass_oop); \
33 if (!ik->find_local_field(name_symbol, signature_symbol, &fd)) { \
34 fatal("Invalid layout of " klass_name_as_C_str); \
35 } \
36 dest_offset = fd.offset(); \
37 }
38
39 // Same as above but for "optional" offsets that might not be present in certain JDK versions
40 #define COMPUTE_OPTIONAL_OFFSET(klass_name_as_C_str, dest_offset, klass_oop, name_symbol, signature_symbol) \
41 { \
42 fieldDescriptor fd; \
43 instanceKlass* ik = instanceKlass::cast(klass_oop); \
44 if (ik->find_local_field(name_symbol, signature_symbol, &fd)) { \
45 dest_offset = fd.offset(); \
46 } \
47 }
48
49 Handle java_lang_String::basic_create(int length, bool tenured, TRAPS) {
50 // Create the String object first, so there's a chance that the String
51 // and the char array it points to end up in the same cache line.
52 oop obj;
53 if (tenured) {
54 obj = instanceKlass::cast(SystemDictionary::string_klass())->allocate_permanent_instance(CHECK_NH);
55 } else {
56 obj = instanceKlass::cast(SystemDictionary::string_klass())->allocate_instance(CHECK_NH);
57 }
58
59 // Create the char array. The String object must be handlized here
60 // because GC can happen as a result of the allocation attempt.
61 Handle h_obj(THREAD, obj);
62 typeArrayOop buffer;
63 if (tenured) {
64 buffer = oopFactory::new_permanent_charArray(length, CHECK_NH);
65 } else {
66 buffer = oopFactory::new_charArray(length, CHECK_NH);
67 }
68
69 // Point the String at the char array
70 obj = h_obj();
71 set_value(obj, buffer);
72 // No need to zero the offset, allocation zero'ed the entire String object
73 assert(offset(obj) == 0, "initial String offset should be zero");
74 //set_offset(obj, 0);
75 set_count(obj, length);
76
77 return h_obj;
78 }
79
80 Handle java_lang_String::basic_create_from_unicode(jchar* unicode, int length, bool tenured, TRAPS) {
81 Handle h_obj = basic_create(length, tenured, CHECK_NH);
82 typeArrayOop buffer = value(h_obj());
83 for (int index = 0; index < length; index++) {
84 buffer->char_at_put(index, unicode[index]);
85 }
86 return h_obj;
87 }
88
89 Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) {
90 return basic_create_from_unicode(unicode, length, false, CHECK_NH);
91 }
92
93 Handle java_lang_String::create_tenured_from_unicode(jchar* unicode, int length, TRAPS) {
94 return basic_create_from_unicode(unicode, length, true, CHECK_NH);
95 }
96
97 oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) {
98 Handle h_obj = basic_create_from_unicode(unicode, length, false, CHECK_0);
99 return h_obj();
100 }
101
102 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
103 if (utf8_str == NULL) {
104 return Handle();
105 }
106 int length = UTF8::unicode_length(utf8_str);
107 Handle h_obj = basic_create(length, false, CHECK_NH);
108 if (length > 0) {
109 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
110 }
111 return h_obj;
112 }
113
114 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
115 Handle h_obj = create_from_str(utf8_str, CHECK_0);
116 return h_obj();
117 }
118
119 Handle java_lang_String::create_from_symbol(symbolHandle symbol, TRAPS) {
120 int length = UTF8::unicode_length((char*)symbol->bytes(), symbol->utf8_length());
121 Handle h_obj = basic_create(length, false, CHECK_NH);
122 if (length > 0) {
123 UTF8::convert_to_unicode((char*)symbol->bytes(), value(h_obj())->char_at_addr(0), length);
124 }
125 return h_obj;
126 }
127
128 // Converts a C string to a Java String based on current encoding
129 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
130 assert(str != NULL, "bad arguments");
131
132 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *);
133 static to_java_string_fn_t _to_java_string_fn = NULL;
134
135 if (_to_java_string_fn == NULL) {
136 void *lib_handle = os::native_java_library();
137 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, hpi::dll_lookup(lib_handle, "NewStringPlatform"));
138 if (_to_java_string_fn == NULL) {
139 fatal("NewStringPlatform missing");
140 }
141 }
142
143 jstring js = NULL;
144 { JavaThread* thread = (JavaThread*)THREAD;
145 assert(thread->is_Java_thread(), "must be java thread");
146 ThreadToNativeFromVM ttn(thread);
147 HandleMark hm(thread);
148 js = (_to_java_string_fn)(thread->jni_environment(), str);
149 }
150 return Handle(THREAD, JNIHandles::resolve(js));
151 }
152
153 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) {
154 oop obj = java_string();
155 // Typical usage is to convert all '/' to '.' in string.
156 typeArrayOop value = java_lang_String::value(obj);
157 int offset = java_lang_String::offset(obj);
158 int length = java_lang_String::length(obj);
159
160 // First check if any from_char exist
161 int index; // Declared outside, used later
162 for (index = 0; index < length; index++) {
163 if (value->char_at(index + offset) == from_char) {
164 break;
165 }
166 }
167 if (index == length) {
168 // No from_char, so do not copy.
169 return java_string;
170 }
171
172 // Create new UNICODE buffer. Must handlize value because GC
173 // may happen during String and char array creation.
174 typeArrayHandle h_value(THREAD, value);
175 Handle string = basic_create(length, false, CHECK_NH);
176
177 typeArrayOop from_buffer = h_value();
178 typeArrayOop to_buffer = java_lang_String::value(string());
179
180 // Copy contents
181 for (index = 0; index < length; index++) {
182 jchar c = from_buffer->char_at(index + offset);
183 if (c == from_char) {
184 c = to_char;
185 }
186 to_buffer->char_at_put(index, c);
187 }
188 return string;
189 }
190
191 jchar* java_lang_String::as_unicode_string(oop java_string, int& length) {
192 typeArrayOop value = java_lang_String::value(java_string);
193 int offset = java_lang_String::offset(java_string);
194 length = java_lang_String::length(java_string);
195
196 jchar* result = NEW_RESOURCE_ARRAY(jchar, length);
197 for (int index = 0; index < length; index++) {
198 result[index] = value->char_at(index + offset);
199 }
200 return result;
201 }
202
203 symbolHandle java_lang_String::as_symbol(Handle java_string, TRAPS) {
204 oop obj = java_string();
205 typeArrayOop value = java_lang_String::value(obj);
206 int offset = java_lang_String::offset(obj);
207 int length = java_lang_String::length(obj);
208
209 ResourceMark rm(THREAD);
210 symbolHandle result;
211
212 if (length > 0) {
213 int utf8_length = UNICODE::utf8_length(value->char_at_addr(offset), length);
214 char* chars = NEW_RESOURCE_ARRAY(char, utf8_length + 1);
215 UNICODE::convert_to_utf8(value->char_at_addr(offset), length, chars);
216 // Allocate the symbol
217 result = oopFactory::new_symbol_handle(chars, utf8_length, CHECK_(symbolHandle()));
218 } else {
219 result = oopFactory::new_symbol_handle("", 0, CHECK_(symbolHandle()));
220 }
221 return result;
222 }
223
224 int java_lang_String::utf8_length(oop java_string) {
225 typeArrayOop value = java_lang_String::value(java_string);
226 int offset = java_lang_String::offset(java_string);
227 int length = java_lang_String::length(java_string);
228 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
229 return UNICODE::utf8_length(position, length);
230 }
231
232 char* java_lang_String::as_utf8_string(oop java_string) {
233 typeArrayOop value = java_lang_String::value(java_string);
234 int offset = java_lang_String::offset(java_string);
235 int length = java_lang_String::length(java_string);
236 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
237 return UNICODE::as_utf8(position, length);
238 }
239
240 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
241 typeArrayOop value = java_lang_String::value(java_string);
242 int offset = java_lang_String::offset(java_string);
243 int length = java_lang_String::length(java_string);
244 assert(start + len <= length, "just checking");
245 jchar* position = value->char_at_addr(offset + start);
246 return UNICODE::as_utf8(position, len);
247 }
248
249 bool java_lang_String::equals(oop java_string, jchar* chars, int len) {
250 assert(SharedSkipVerify ||
251 java_string->klass() == SystemDictionary::string_klass(),
252 "must be java_string");
253 typeArrayOop value = java_lang_String::value(java_string);
254 int offset = java_lang_String::offset(java_string);
255 int length = java_lang_String::length(java_string);
256 if (length != len) {
257 return false;
258 }
259 for (int i = 0; i < len; i++) {
260 if (value->char_at(i + offset) != chars[i]) {
261 return false;
262 }
263 }
264 return true;
265 }
266
267 void java_lang_String::print(Handle java_string, outputStream* st) {
268 oop obj = java_string();
269 assert(obj->klass() == SystemDictionary::string_klass(), "must be java_string");
270 typeArrayOop value = java_lang_String::value(obj);
271 int offset = java_lang_String::offset(obj);
272 int length = java_lang_String::length(obj);
273
274 int end = MIN2(length, 100);
275 if (value == NULL) {
276 // This can happen if, e.g., printing a String
277 // object before its initializer has been called
278 st->print_cr("NULL");
279 } else {
280 st->print("\"");
281 for (int index = 0; index < length; index++) {
282 st->print("%c", value->char_at(index + offset));
283 }
284 st->print("\"");
285 }
286 }
287
288
289 oop java_lang_Class::create_mirror(KlassHandle k, TRAPS) {
290 assert(k->java_mirror() == NULL, "should only assign mirror once");
291 // Use this moment of initialization to cache modifier_flags also,
292 // to support Class.getModifiers(). Instance classes recalculate
293 // the cached flags after the class file is parsed, but before the
294 // class is put into the system dictionary.
295 int computed_modifiers = k->compute_modifier_flags(CHECK_0);
296 k->set_modifier_flags(computed_modifiers);
297 if (SystemDictionary::class_klass_loaded()) {
298 // Allocate mirror (java.lang.Class instance)
299 Handle mirror = instanceKlass::cast(SystemDictionary::class_klass())->allocate_permanent_instance(CHECK_0);
300 // Setup indirections
301 mirror->obj_field_put(klass_offset, k());
302 k->set_java_mirror(mirror());
303 // It might also have a component mirror. This mirror must already exist.
304 if (k->oop_is_javaArray()) {
305 Handle comp_mirror;
306 if (k->oop_is_typeArray()) {
307 BasicType type = typeArrayKlass::cast(k->as_klassOop())->element_type();
308 comp_mirror = Universe::java_mirror(type);
309 assert(comp_mirror.not_null(), "must have primitive mirror");
310 } else if (k->oop_is_objArray()) {
311 klassOop element_klass = objArrayKlass::cast(k->as_klassOop())->element_klass();
312 if (element_klass != NULL
313 && (Klass::cast(element_klass)->oop_is_instance() ||
314 Klass::cast(element_klass)->oop_is_javaArray())) {
315 comp_mirror = Klass::cast(element_klass)->java_mirror();
316 assert(comp_mirror.not_null(), "must have element mirror");
317 }
318 // else some object array internal to the VM, like systemObjArrayKlassObj
319 }
320 if (comp_mirror.not_null()) {
321 // Two-way link between the array klass and its component mirror:
322 arrayKlass::cast(k->as_klassOop())->set_component_mirror(comp_mirror());
323 set_array_klass(comp_mirror(), k->as_klassOop());
324 }
325 }
326 return mirror();
327 } else {
328 return NULL;
329 }
330 }
331
332
333 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
334 // This should be improved by adding a field at the Java level or by
335 // introducing a new VM klass (see comment in ClassFileParser)
336 oop java_class = instanceKlass::cast(SystemDictionary::class_klass())->allocate_permanent_instance(CHECK_0);
337 if (type != T_VOID) {
338 klassOop aklass = Universe::typeArrayKlassObj(type);
339 assert(aklass != NULL, "correct bootstrap");
340 set_array_klass(java_class, aklass);
341 }
342 return java_class;
343 }
344
345
346 klassOop java_lang_Class::as_klassOop(oop java_class) {
347 //%note memory_2
348 klassOop k = klassOop(java_class->obj_field(klass_offset));
349 assert(k == NULL || k->is_klass(), "type check");
350 return k;
351 }
352
353
354 klassOop java_lang_Class::array_klass(oop java_class) {
355 klassOop k = klassOop(java_class->obj_field(array_klass_offset));
356 assert(k == NULL || k->is_klass() && Klass::cast(k)->oop_is_javaArray(), "should be array klass");
357 return k;
358 }
359
360
361 void java_lang_Class::set_array_klass(oop java_class, klassOop klass) {
362 assert(klass->is_klass() && Klass::cast(klass)->oop_is_javaArray(), "should be array klass");
363 java_class->obj_field_put(array_klass_offset, klass);
364 }
365
366
367 methodOop java_lang_Class::resolved_constructor(oop java_class) {
368 oop constructor = java_class->obj_field(resolved_constructor_offset);
369 assert(constructor == NULL || constructor->is_method(), "should be method");
370 return methodOop(constructor);
371 }
372
373
374 void java_lang_Class::set_resolved_constructor(oop java_class, methodOop constructor) {
375 assert(constructor->is_method(), "should be method");
376 java_class->obj_field_put(resolved_constructor_offset, constructor);
377 }
378
379
380 bool java_lang_Class::is_primitive(oop java_class) {
381 klassOop k = klassOop(java_class->obj_field(klass_offset));
382 return k == NULL;
383 }
384
385
386 BasicType java_lang_Class::primitive_type(oop java_class) {
387 assert(java_lang_Class::is_primitive(java_class), "just checking");
388 klassOop ak = klassOop(java_class->obj_field(array_klass_offset));
389 BasicType type = T_VOID;
390 if (ak != NULL) {
391 // Note: create_basic_type_mirror above initializes ak to a non-null value.
392 type = arrayKlass::cast(ak)->element_type();
393 } else {
394 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
395 }
396 assert(Universe::java_mirror(type) == java_class, "must be consistent");
397 return type;
398 }
399
400
401 oop java_lang_Class::primitive_mirror(BasicType t) {
402 oop mirror = Universe::java_mirror(t);
403 assert(mirror != NULL && mirror->is_a(SystemDictionary::class_klass()), "must be a Class");
404 assert(java_lang_Class::is_primitive(mirror), "must be primitive");
405 return mirror;
406 }
407
408 bool java_lang_Class::offsets_computed = false;
409 int java_lang_Class::classRedefinedCount_offset = -1;
410
411 void java_lang_Class::compute_offsets() {
412 assert(!offsets_computed, "offsets should be initialized only once");
413 offsets_computed = true;
414
415 klassOop k = SystemDictionary::class_klass();
416 // The classRedefinedCount field is only present starting in 1.5,
417 // so don't go fatal.
418 COMPUTE_OPTIONAL_OFFSET("java.lang.Class", classRedefinedCount_offset,
419 k, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature());
420 }
421
422 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
423 if (!JDK_Version::is_gte_jdk15x_version()
424 || classRedefinedCount_offset == -1) {
425 // The classRedefinedCount field is only present starting in 1.5.
426 // If we don't have an offset for it then just return -1 as a marker.
427 return -1;
428 }
429
430 return the_class_mirror->int_field(classRedefinedCount_offset);
431 }
432
433 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
434 if (!JDK_Version::is_gte_jdk15x_version()
435 || classRedefinedCount_offset == -1) {
436 // The classRedefinedCount field is only present starting in 1.5.
437 // If we don't have an offset for it then nothing to set.
438 return;
439 }
440
441 the_class_mirror->int_field_put(classRedefinedCount_offset, value);
442 }
443
444
445 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
446 // platform thread structure, and a eetop offset which was used for thread
447 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
448 // merged, so in the HotSpot VM we just use the eetop field for the thread
449 // instead of the privateInfo_offset.
450 //
451 // Note: The stackSize field is only present starting in 1.4.
452
453 int java_lang_Thread::_name_offset = 0;
454 int java_lang_Thread::_group_offset = 0;
455 int java_lang_Thread::_contextClassLoader_offset = 0;
456 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
457 int java_lang_Thread::_priority_offset = 0;
458 int java_lang_Thread::_eetop_offset = 0;
459 int java_lang_Thread::_daemon_offset = 0;
460 int java_lang_Thread::_stillborn_offset = 0;
461 int java_lang_Thread::_stackSize_offset = 0;
462 int java_lang_Thread::_tid_offset = 0;
463 int java_lang_Thread::_thread_status_offset = 0;
464 int java_lang_Thread::_park_blocker_offset = 0;
465 int java_lang_Thread::_park_event_offset = 0 ;
466
467
468 void java_lang_Thread::compute_offsets() {
469 assert(_group_offset == 0, "offsets should be initialized only once");
470
471 klassOop k = SystemDictionary::thread_klass();
472 COMPUTE_OFFSET("java.lang.Thread", _name_offset, k, vmSymbols::name_name(), vmSymbols::char_array_signature());
473 COMPUTE_OFFSET("java.lang.Thread", _group_offset, k, vmSymbols::group_name(), vmSymbols::threadgroup_signature());
474 COMPUTE_OFFSET("java.lang.Thread", _contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature());
475 COMPUTE_OFFSET("java.lang.Thread", _inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature());
476 COMPUTE_OFFSET("java.lang.Thread", _priority_offset, k, vmSymbols::priority_name(), vmSymbols::int_signature());
477 COMPUTE_OFFSET("java.lang.Thread", _daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
478 COMPUTE_OFFSET("java.lang.Thread", _eetop_offset, k, vmSymbols::eetop_name(), vmSymbols::long_signature());
479 COMPUTE_OFFSET("java.lang.Thread", _stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature());
480 // The stackSize field is only present starting in 1.4, so don't go fatal.
481 COMPUTE_OPTIONAL_OFFSET("java.lang.Thread", _stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature());
482 // The tid and thread_status fields are only present starting in 1.5, so don't go fatal.
483 COMPUTE_OPTIONAL_OFFSET("java.lang.Thread", _tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature());
484 COMPUTE_OPTIONAL_OFFSET("java.lang.Thread", _thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature());
485 // The parkBlocker field is only present starting in 1.6, so don't go fatal.
486 COMPUTE_OPTIONAL_OFFSET("java.lang.Thread", _park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature());
487 COMPUTE_OPTIONAL_OFFSET("java.lang.Thread", _park_event_offset, k, vmSymbols::park_event_name(),
488 vmSymbols::long_signature());
489 }
490
491
492 JavaThread* java_lang_Thread::thread(oop java_thread) {
493 return (JavaThread*) java_thread->obj_field(_eetop_offset);
494 }
495
496
497 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
498 // We are storing a JavaThread* (malloc'ed data) into a long field in the thread
499 // object. The store has to be 64-bit wide so we use a pointer store, but we
500 // cannot call oopDesc::obj_field_put since it includes a write barrier!
501 oop* addr = java_thread->obj_field_addr(_eetop_offset);
502 *addr = (oop) thread;
503 }
504
505
506 typeArrayOop java_lang_Thread::name(oop java_thread) {
507 oop name = java_thread->obj_field(_name_offset);
508 assert(name == NULL || (name->is_typeArray() && typeArrayKlass::cast(name->klass())->element_type() == T_CHAR), "just checking");
509 return typeArrayOop(name);
510 }
511
512
513 void java_lang_Thread::set_name(oop java_thread, typeArrayOop name) {
514 assert(java_thread->obj_field(_name_offset) == NULL, "name should be NULL");
515 java_thread->obj_field_put(_name_offset, name);
516 }
517
518
519 ThreadPriority java_lang_Thread::priority(oop java_thread) {
520 return (ThreadPriority)java_thread->int_field(_priority_offset);
521 }
522
523
524 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
525 java_thread->int_field_put(_priority_offset, priority);
526 }
527
528
529 oop java_lang_Thread::threadGroup(oop java_thread) {
530 return java_thread->obj_field(_group_offset);
531 }
532
533
534 bool java_lang_Thread::is_stillborn(oop java_thread) {
535 return java_thread->bool_field(_stillborn_offset) != 0;
536 }
537
538
539 // We never have reason to turn the stillborn bit off
540 void java_lang_Thread::set_stillborn(oop java_thread) {
541 java_thread->bool_field_put(_stillborn_offset, true);
542 }
543
544
545 bool java_lang_Thread::is_alive(oop java_thread) {
546 JavaThread* thr = java_lang_Thread::thread(java_thread);
547 return (thr != NULL);
548 }
549
550
551 bool java_lang_Thread::is_daemon(oop java_thread) {
552 return java_thread->bool_field(_daemon_offset) != 0;
553 }
554
555
556 void java_lang_Thread::set_daemon(oop java_thread) {
557 java_thread->bool_field_put(_daemon_offset, true);
558 }
559
560 oop java_lang_Thread::context_class_loader(oop java_thread) {
561 return java_thread->obj_field(_contextClassLoader_offset);
562 }
563
564 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
565 return java_thread->obj_field(_inheritedAccessControlContext_offset);
566 }
567
568
569 jlong java_lang_Thread::stackSize(oop java_thread) {
570 // The stackSize field is only present starting in 1.4
571 if (_stackSize_offset > 0) {
572 assert(JDK_Version::is_gte_jdk14x_version(), "sanity check");
573 return java_thread->long_field(_stackSize_offset);
574 } else {
575 return 0;
576 }
577 }
578
579 // Write the thread status value to threadStatus field in java.lang.Thread java class.
580 void java_lang_Thread::set_thread_status(oop java_thread,
581 java_lang_Thread::ThreadStatus status) {
582 assert(JavaThread::current()->thread_state() == _thread_in_vm, "Java Thread is not running in vm");
583 // The threadStatus is only present starting in 1.5
584 if (_thread_status_offset > 0) {
585 java_thread->int_field_put(_thread_status_offset, status);
586 }
587 }
588
589 // Read thread status value from threadStatus field in java.lang.Thread java class.
590 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
591 assert(Thread::current()->is_VM_thread() ||
592 JavaThread::current()->thread_state() == _thread_in_vm,
593 "Java Thread is not running in vm");
594 // The threadStatus is only present starting in 1.5
595 if (_thread_status_offset > 0) {
596 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
597 } else {
598 // All we can easily figure out is if it is alive, but that is
599 // enough info for a valid unknown status.
600 // These aren't restricted to valid set ThreadStatus values, so
601 // use JVMTI values and cast.
602 JavaThread* thr = java_lang_Thread::thread(java_thread);
603 if (thr == NULL) {
604 // the thread hasn't run yet or is in the process of exiting
605 return NEW;
606 }
607 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE;
608 }
609 }
610
611
612 jlong java_lang_Thread::thread_id(oop java_thread) {
613 // The thread ID field is only present starting in 1.5
614 if (_tid_offset > 0) {
615 return java_thread->long_field(_tid_offset);
616 } else {
617 return 0;
618 }
619 }
620
621 oop java_lang_Thread::park_blocker(oop java_thread) {
622 assert(JDK_Version::supports_thread_park_blocker() && _park_blocker_offset != 0,
623 "Must support parkBlocker field");
624
625 if (_park_blocker_offset > 0) {
626 return java_thread->obj_field(_park_blocker_offset);
627 }
628
629 return NULL;
630 }
631
632 jlong java_lang_Thread::park_event(oop java_thread) {
633 if (_park_event_offset > 0) {
634 return java_thread->long_field(_park_event_offset);
635 }
636 return 0;
637 }
638
639 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) {
640 if (_park_event_offset > 0) {
641 java_thread->long_field_put(_park_event_offset, ptr);
642 return true;
643 }
644 return false;
645 }
646
647
648 const char* java_lang_Thread::thread_status_name(oop java_thread) {
649 assert(JDK_Version::is_gte_jdk15x_version() && _thread_status_offset != 0, "Must have thread status");
650 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
651 switch (status) {
652 case NEW : return "NEW";
653 case RUNNABLE : return "RUNNABLE";
654 case SLEEPING : return "TIMED_WAITING (sleeping)";
655 case IN_OBJECT_WAIT : return "WAITING (on object monitor)";
656 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
657 case PARKED : return "WAITING (parking)";
658 case PARKED_TIMED : return "TIMED_WAITING (parking)";
659 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
660 case TERMINATED : return "TERMINATED";
661 default : return "UNKNOWN";
662 };
663 }
664 int java_lang_ThreadGroup::_parent_offset = 0;
665 int java_lang_ThreadGroup::_name_offset = 0;
666 int java_lang_ThreadGroup::_threads_offset = 0;
667 int java_lang_ThreadGroup::_groups_offset = 0;
668 int java_lang_ThreadGroup::_maxPriority_offset = 0;
669 int java_lang_ThreadGroup::_destroyed_offset = 0;
670 int java_lang_ThreadGroup::_daemon_offset = 0;
671 int java_lang_ThreadGroup::_vmAllowSuspension_offset = 0;
672 int java_lang_ThreadGroup::_nthreads_offset = 0;
673 int java_lang_ThreadGroup::_ngroups_offset = 0;
674
675 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
676 assert(java_thread_group->is_oop(), "thread group must be oop");
677 return java_thread_group->obj_field(_parent_offset);
678 }
679
680 // ("name as oop" accessor is not necessary)
681
682 typeArrayOop java_lang_ThreadGroup::name(oop java_thread_group) {
683 oop name = java_thread_group->obj_field(_name_offset);
684 // ThreadGroup.name can be null
685 return name == NULL ? (typeArrayOop)NULL : java_lang_String::value(name);
686 }
687
688 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
689 assert(java_thread_group->is_oop(), "thread group must be oop");
690 return java_thread_group->int_field(_nthreads_offset);
691 }
692
693 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
694 oop threads = java_thread_group->obj_field(_threads_offset);
695 assert(threads != NULL, "threadgroups should have threads");
696 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
697 return objArrayOop(threads);
698 }
699
700 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
701 assert(java_thread_group->is_oop(), "thread group must be oop");
702 return java_thread_group->int_field(_ngroups_offset);
703 }
704
705 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
706 oop groups = java_thread_group->obj_field(_groups_offset);
707 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
708 return objArrayOop(groups);
709 }
710
711 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
712 assert(java_thread_group->is_oop(), "thread group must be oop");
713 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
714 }
715
716 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
717 assert(java_thread_group->is_oop(), "thread group must be oop");
718 return java_thread_group->bool_field(_destroyed_offset) != 0;
719 }
720
721 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
722 assert(java_thread_group->is_oop(), "thread group must be oop");
723 return java_thread_group->bool_field(_daemon_offset) != 0;
724 }
725
726 bool java_lang_ThreadGroup::is_vmAllowSuspension(oop java_thread_group) {
727 assert(java_thread_group->is_oop(), "thread group must be oop");
728 return java_thread_group->bool_field(_vmAllowSuspension_offset) != 0;
729 }
730
731 void java_lang_ThreadGroup::compute_offsets() {
732 assert(_parent_offset == 0, "offsets should be initialized only once");
733
734 klassOop k = SystemDictionary::threadGroup_klass();
735
736 COMPUTE_OFFSET("java.lang.ThreadGroup", _parent_offset, k, vmSymbols::parent_name(), vmSymbols::threadgroup_signature());
737 COMPUTE_OFFSET("java.lang.ThreadGroup", _name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
738 COMPUTE_OFFSET("java.lang.ThreadGroup", _threads_offset, k, vmSymbols::threads_name(), vmSymbols::thread_array_signature());
739 COMPUTE_OFFSET("java.lang.ThreadGroup", _groups_offset, k, vmSymbols::groups_name(), vmSymbols::threadgroup_array_signature());
740 COMPUTE_OFFSET("java.lang.ThreadGroup", _maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature());
741 COMPUTE_OFFSET("java.lang.ThreadGroup", _destroyed_offset, k, vmSymbols::destroyed_name(), vmSymbols::bool_signature());
742 COMPUTE_OFFSET("java.lang.ThreadGroup", _daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
743 COMPUTE_OFFSET("java.lang.ThreadGroup", _vmAllowSuspension_offset, k, vmSymbols::vmAllowSuspension_name(), vmSymbols::bool_signature());
744 COMPUTE_OFFSET("java.lang.ThreadGroup", _nthreads_offset, k, vmSymbols::nthreads_name(), vmSymbols::int_signature());
745 COMPUTE_OFFSET("java.lang.ThreadGroup", _ngroups_offset, k, vmSymbols::ngroups_name(), vmSymbols::int_signature());
746 }
747
748 oop java_lang_Throwable::backtrace(oop throwable) {
749 return throwable->obj_field_acquire(backtrace_offset);
750 }
751
752
753 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
754 throwable->release_obj_field_put(backtrace_offset, value);
755 }
756
757
758 oop java_lang_Throwable::message(oop throwable) {
759 return throwable->obj_field(detailMessage_offset);
760 }
761
762
763 oop java_lang_Throwable::message(Handle throwable) {
764 return throwable->obj_field(detailMessage_offset);
765 }
766
767
768 void java_lang_Throwable::set_message(oop throwable, oop value) {
769 throwable->obj_field_put(detailMessage_offset, value);
770 }
771
772
773 void java_lang_Throwable::clear_stacktrace(oop throwable) {
774 assert(JDK_Version::is_gte_jdk14x_version(), "should only be called in >= 1.4");
775 throwable->obj_field_put(stackTrace_offset, NULL);
776 }
777
778
779 void java_lang_Throwable::print(oop throwable, outputStream* st) {
780 ResourceMark rm;
781 klassOop k = throwable->klass();
782 assert(k != NULL, "just checking");
783 st->print("%s", instanceKlass::cast(k)->external_name());
784 oop msg = message(throwable);
785 if (msg != NULL) {
786 st->print(": %s", java_lang_String::as_utf8_string(msg));
787 }
788 }
789
790
791 void java_lang_Throwable::print(Handle throwable, outputStream* st) {
792 ResourceMark rm;
793 klassOop k = throwable->klass();
794 assert(k != NULL, "just checking");
795 st->print("%s", instanceKlass::cast(k)->external_name());
796 oop msg = message(throwable);
797 if (msg != NULL) {
798 st->print(": %s", java_lang_String::as_utf8_string(msg));
799 }
800 }
801
802 // Print stack trace element to resource allocated buffer
803 char* java_lang_Throwable::print_stack_element_to_buffer(methodOop method, int bci) {
804 // Get strings and string lengths
805 instanceKlass* klass = instanceKlass::cast(method->method_holder());
806 const char* klass_name = klass->external_name();
807 int buf_len = (int)strlen(klass_name);
808 char* source_file_name;
809 if (klass->source_file_name() == NULL) {
810 source_file_name = NULL;
811 } else {
812 source_file_name = klass->source_file_name()->as_C_string();
813 buf_len += (int)strlen(source_file_name);
814 }
815 char* method_name = method->name()->as_C_string();
816 buf_len += (int)strlen(method_name);
817
818 // Allocate temporary buffer with extra space for formatting and line number
819 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
820
821 // Print stack trace line in buffer
822 sprintf(buf, "\tat %s.%s", klass_name, method_name);
823 if (method->is_native()) {
824 strcat(buf, "(Native Method)");
825 } else {
826 int line_number = method->line_number_from_bci(bci);
827 if (source_file_name != NULL && (line_number != -1)) {
828 // Sourcename and linenumber
829 sprintf(buf + (int)strlen(buf), "(%s:%d)", source_file_name, line_number);
830 } else if (source_file_name != NULL) {
831 // Just sourcename
832 sprintf(buf + (int)strlen(buf), "(%s)", source_file_name);
833 } else {
834 // Neither soucename and linenumber
835 sprintf(buf + (int)strlen(buf), "(Unknown Source)");
836 }
837 nmethod* nm = method->code();
838 if (WizardMode && nm != NULL) {
839 sprintf(buf + (int)strlen(buf), "(nmethod %#x)", nm);
840 }
841 }
842
843 return buf;
844 }
845
846
847 void java_lang_Throwable::print_stack_element(Handle stream, methodOop method, int bci) {
848 ResourceMark rm;
849 char* buf = print_stack_element_to_buffer(method, bci);
850 print_to_stream(stream, buf);
851 }
852
853 void java_lang_Throwable::print_stack_element(outputStream *st, methodOop method, int bci) {
854 ResourceMark rm;
855 char* buf = print_stack_element_to_buffer(method, bci);
856 st->print_cr("%s", buf);
857 }
858
859 void java_lang_Throwable::print_to_stream(Handle stream, const char* str) {
860 if (stream.is_null()) {
861 tty->print_cr("%s", str);
862 } else {
863 EXCEPTION_MARK;
864 JavaValue result(T_VOID);
865 Handle arg (THREAD, oopFactory::new_charArray(str, THREAD));
866 if (!HAS_PENDING_EXCEPTION) {
867 JavaCalls::call_virtual(&result,
868 stream,
869 KlassHandle(THREAD, stream->klass()),
870 vmSymbolHandles::println_name(),
871 vmSymbolHandles::char_array_void_signature(),
872 arg,
873 THREAD);
874 }
875 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
876 if (HAS_PENDING_EXCEPTION) CLEAR_PENDING_EXCEPTION;
877 }
878
879 }
880
881
882 const char* java_lang_Throwable::no_stack_trace_message() {
883 return "\t<<no stack trace available>>";
884 }
885
886
887 // Currently used only for exceptions occurring during startup
888 void java_lang_Throwable::print_stack_trace(oop throwable, outputStream* st) {
889 Thread *THREAD = Thread::current();
890 Handle h_throwable(THREAD, throwable);
891 while (h_throwable.not_null()) {
892 objArrayHandle result (THREAD, objArrayOop(backtrace(h_throwable())));
893 if (result.is_null()) {
894 st->print_cr(no_stack_trace_message());
895 return;
896 }
897
898 while (result.not_null()) {
899 objArrayHandle methods (THREAD,
900 objArrayOop(result->obj_at(trace_methods_offset)));
901 typeArrayHandle bcis (THREAD,
902 typeArrayOop(result->obj_at(trace_bcis_offset)));
903
904 if (methods.is_null() || bcis.is_null()) {
905 st->print_cr(no_stack_trace_message());
906 return;
907 }
908
909 int length = methods()->length();
910 for (int index = 0; index < length; index++) {
911 methodOop method = methodOop(methods()->obj_at(index));
912 if (method == NULL) goto handle_cause;
913 int bci = bcis->ushort_at(index);
914 print_stack_element(st, method, bci);
915 }
916 result = objArrayHandle(THREAD, objArrayOop(result->obj_at(trace_next_offset)));
917 }
918 handle_cause:
919 {
920 EXCEPTION_MARK;
921 JavaValue result(T_OBJECT);
922 JavaCalls::call_virtual(&result,
923 h_throwable,
924 KlassHandle(THREAD, h_throwable->klass()),
925 vmSymbolHandles::getCause_name(),
926 vmSymbolHandles::void_throwable_signature(),
927 THREAD);
928 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
929 if (HAS_PENDING_EXCEPTION) {
930 CLEAR_PENDING_EXCEPTION;
931 h_throwable = Handle();
932 } else {
933 h_throwable = Handle(THREAD, (oop) result.get_jobject());
934 if (h_throwable.not_null()) {
935 st->print("Caused by: ");
936 print(h_throwable, st);
937 st->cr();
938 }
939 }
940 }
941 }
942 }
943
944
945 void java_lang_Throwable::print_stack_trace(oop throwable, oop print_stream) {
946 // Note: this is no longer used in Merlin, but we support it for compatibility.
947 Thread *thread = Thread::current();
948 Handle stream(thread, print_stream);
949 objArrayHandle result (thread, objArrayOop(backtrace(throwable)));
950 if (result.is_null()) {
951 print_to_stream(stream, no_stack_trace_message());
952 return;
953 }
954
955 while (result.not_null()) {
956 objArrayHandle methods (thread,
957 objArrayOop(result->obj_at(trace_methods_offset)));
958 typeArrayHandle bcis (thread,
959 typeArrayOop(result->obj_at(trace_bcis_offset)));
960
961 if (methods.is_null() || bcis.is_null()) {
962 print_to_stream(stream, no_stack_trace_message());
963 return;
964 }
965
966 int length = methods()->length();
967 for (int index = 0; index < length; index++) {
968 methodOop method = methodOop(methods()->obj_at(index));
969 if (method == NULL) return;
970 int bci = bcis->ushort_at(index);
971 print_stack_element(stream, method, bci);
972 }
973 result = objArrayHandle(thread, objArrayOop(result->obj_at(trace_next_offset)));
974 }
975 }
976
977 // This class provides a simple wrapper over the internal structure of
978 // exception backtrace to insulate users of the backtrace from needing
979 // to know what it looks like.
980 class BacktraceBuilder: public StackObj {
981 private:
982 Handle _backtrace;
983 objArrayOop _head;
984 objArrayOop _methods;
985 typeArrayOop _bcis;
986 int _index;
987 bool _dirty;
988 bool _done;
989 No_Safepoint_Verifier _nsv;
990
991 public:
992
993 enum {
994 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
995 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
996 trace_next_offset = java_lang_Throwable::trace_next_offset,
997 trace_size = java_lang_Throwable::trace_size,
998 trace_chunk_size = java_lang_Throwable::trace_chunk_size
999 };
1000
1001 // constructor for new backtrace
1002 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL) {
1003 expand(CHECK);
1004 _backtrace = _head;
1005 _index = 0;
1006 _dirty = false;
1007 _done = false;
1008 }
1009
1010 void flush() {
1011 if (_dirty && _methods != NULL) {
1012 BarrierSet* bs = Universe::heap()->barrier_set();
1013 assert(bs->has_write_ref_array_opt(), "Barrier set must have ref array opt");
1014 bs->write_ref_array(MemRegion((HeapWord*)_methods->obj_at_addr(0),
1015 _methods->length() * HeapWordsPerOop));
1016 _dirty = false;
1017 }
1018 }
1019
1020 void expand(TRAPS) {
1021 flush();
1022
1023 objArrayHandle old_head(THREAD, _head);
1024 Pause_No_Safepoint_Verifier pnsv(&_nsv);
1025
1026 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
1027 objArrayHandle new_head(THREAD, head);
1028
1029 objArrayOop methods = oopFactory::new_objectArray(trace_chunk_size, CHECK);
1030 objArrayHandle new_methods(THREAD, methods);
1031
1032 typeArrayOop bcis = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1033 typeArrayHandle new_bcis(THREAD, bcis);
1034
1035 if (!old_head.is_null()) {
1036 old_head->obj_at_put(trace_next_offset, new_head());
1037 }
1038 new_head->obj_at_put(trace_methods_offset, new_methods());
1039 new_head->obj_at_put(trace_bcis_offset, new_bcis());
1040
1041 _head = new_head();
1042 _methods = new_methods();
1043 _bcis = new_bcis();
1044 _index = 0;
1045 }
1046
1047 oop backtrace() {
1048 flush();
1049 return _backtrace();
1050 }
1051
1052 inline void push(methodOop method, short bci, TRAPS) {
1053 if (_index >= trace_chunk_size) {
1054 methodHandle mhandle(THREAD, method);
1055 expand(CHECK);
1056 method = mhandle();
1057 }
1058
1059 // _methods->obj_at_put(_index, method);
1060 *_methods->obj_at_addr(_index) = method;
1061 _bcis->ushort_at_put(_index, bci);
1062 _index++;
1063 _dirty = true;
1064 }
1065
1066 methodOop current_method() {
1067 assert(_index >= 0 && _index < trace_chunk_size, "out of range");
1068 return methodOop(_methods->obj_at(_index));
1069 }
1070
1071 jushort current_bci() {
1072 assert(_index >= 0 && _index < trace_chunk_size, "out of range");
1073 return _bcis->ushort_at(_index);
1074 }
1075 };
1076
1077
1078 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, TRAPS) {
1079 if (!StackTraceInThrowable) return;
1080 ResourceMark rm(THREAD);
1081
1082 // Start out by clearing the backtrace for this object, in case the VM
1083 // runs out of memory while allocating the stack trace
1084 set_backtrace(throwable(), NULL);
1085 if (JDK_Version::is_gte_jdk14x_version()) {
1086 // New since 1.4, clear lazily constructed Java level stacktrace if
1087 // refilling occurs
1088 clear_stacktrace(throwable());
1089 }
1090
1091 int max_depth = MaxJavaStackTraceDepth;
1092 JavaThread* thread = (JavaThread*)THREAD;
1093 BacktraceBuilder bt(CHECK);
1094
1095 // Instead of using vframe directly, this version of fill_in_stack_trace
1096 // basically handles everything by hand. This significantly improved the
1097 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
1098 // See bug 6333838 for more details.
1099 // The "ASSERT" here is to verify this method generates the exactly same stack
1100 // trace as utilizing vframe.
1101 #ifdef ASSERT
1102 vframeStream st(thread);
1103 methodHandle st_method(THREAD, st.method());
1104 #endif
1105 int total_count = 0;
1106 RegisterMap map(thread, false);
1107 int decode_offset = 0;
1108 nmethod* nm = NULL;
1109 bool skip_fillInStackTrace_check = false;
1110 bool skip_throwableInit_check = false;
1111
1112 for (frame fr = thread->last_frame(); max_depth != total_count;) {
1113 methodOop method = NULL;
1114 int bci = 0;
1115
1116 // Compiled java method case.
1117 if (decode_offset != 0) {
1118 DebugInfoReadStream stream(nm, decode_offset);
1119 decode_offset = stream.read_int();
1120 method = (methodOop)nm->oop_at(stream.read_int());
1121 bci = stream.read_bci();
1122 } else {
1123 if (fr.is_first_frame()) break;
1124 address pc = fr.pc();
1125 if (fr.is_interpreted_frame()) {
1126 intptr_t bcx = fr.interpreter_frame_bcx();
1127 method = fr.interpreter_frame_method();
1128 bci = fr.is_bci(bcx) ? bcx : method->bci_from((address)bcx);
1129 fr = fr.sender(&map);
1130 } else {
1131 CodeBlob* cb = fr.cb();
1132 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
1133 // but non nmethod
1134 fr = fr.sender(&map);
1135 if (cb == NULL || !cb->is_nmethod()) {
1136 continue;
1137 }
1138 nm = (nmethod*)cb;
1139 if (nm->method()->is_native()) {
1140 method = nm->method();
1141 bci = 0;
1142 } else {
1143 PcDesc* pd = nm->pc_desc_at(pc);
1144 decode_offset = pd->scope_decode_offset();
1145 // if decode_offset is not equal to 0, it will execute the
1146 // "compiled java method case" at the beginning of the loop.
1147 continue;
1148 }
1149 }
1150 }
1151 #ifdef ASSERT
1152 assert(st_method() == method && st.bci() == bci,
1153 "Wrong stack trace");
1154 st.next();
1155 // vframeStream::method isn't GC-safe so store off a copy
1156 // of the methodOop in case we GC.
1157 if (!st.at_end()) {
1158 st_method = st.method();
1159 }
1160 #endif
1161 if (!skip_fillInStackTrace_check) {
1162 // check "fillInStackTrace" only once, so we negate the flag
1163 // after the first time check.
1164 skip_fillInStackTrace_check = true;
1165 if (method->name() == vmSymbols::fillInStackTrace_name()) {
1166 continue;
1167 }
1168 }
1169 // skip <init> methods of the exceptions klass. If there is <init> methods
1170 // that belongs to a superclass of the exception we are going to skipping
1171 // them in stack trace. This is simlar to classic VM.
1172 if (!skip_throwableInit_check) {
1173 if (method->name() == vmSymbols::object_initializer_name() &&
1174 throwable->is_a(method->method_holder())) {
1175 continue;
1176 } else {
1177 // if no "Throwable.init()" method found, we stop checking it next time.
1178 skip_throwableInit_check = true;
1179 }
1180 }
1181 bt.push(method, bci, CHECK);
1182 total_count++;
1183 }
1184
1185 // Put completed stack trace into throwable object
1186 set_backtrace(throwable(), bt.backtrace());
1187 }
1188
1189 void java_lang_Throwable::fill_in_stack_trace(Handle throwable) {
1190 // No-op if stack trace is disabled
1191 if (!StackTraceInThrowable) {
1192 return;
1193 }
1194
1195 // Disable stack traces for some preallocated out of memory errors
1196 if (!Universe::should_fill_in_stack_trace(throwable)) {
1197 return;
1198 }
1199
1200 PRESERVE_EXCEPTION_MARK;
1201
1202 JavaThread* thread = JavaThread::active();
1203 fill_in_stack_trace(throwable, thread);
1204 // ignore exceptions thrown during stack trace filling
1205 CLEAR_PENDING_EXCEPTION;
1206 }
1207
1208 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
1209 // Allocate stack trace - backtrace is created but not filled in
1210
1211 // No-op if stack trace is disabled
1212 if (!StackTraceInThrowable) return;
1213
1214 objArrayOop h_oop = oopFactory::new_objectArray(trace_size, CHECK);
1215 objArrayHandle backtrace (THREAD, h_oop);
1216 objArrayOop m_oop = oopFactory::new_objectArray(trace_chunk_size, CHECK);
1217 objArrayHandle methods (THREAD, m_oop);
1218 typeArrayOop b = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1219 typeArrayHandle bcis(THREAD, b);
1220
1221 // backtrace has space for one chunk (next is NULL)
1222 backtrace->obj_at_put(trace_methods_offset, methods());
1223 backtrace->obj_at_put(trace_bcis_offset, bcis());
1224 set_backtrace(throwable(), backtrace());
1225 }
1226
1227
1228 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
1229 // Fill in stack trace into preallocated backtrace (no GC)
1230
1231 // No-op if stack trace is disabled
1232 if (!StackTraceInThrowable) return;
1233
1234 assert(throwable->is_a(SystemDictionary::throwable_klass()), "sanity check");
1235
1236 oop backtrace = java_lang_Throwable::backtrace(throwable());
1237 assert(backtrace != NULL, "backtrace not preallocated");
1238
1239 oop m = objArrayOop(backtrace)->obj_at(trace_methods_offset);
1240 objArrayOop methods = objArrayOop(m);
1241 assert(methods != NULL && methods->length() > 0, "method array not preallocated");
1242
1243 oop b = objArrayOop(backtrace)->obj_at(trace_bcis_offset);
1244 typeArrayOop bcis = typeArrayOop(b);
1245 assert(bcis != NULL, "bci array not preallocated");
1246
1247 assert(methods->length() == bcis->length(), "method and bci arrays should match");
1248
1249 JavaThread* thread = JavaThread::current();
1250 ResourceMark rm(thread);
1251 vframeStream st(thread);
1252
1253 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
1254 // methods as preallocated errors aren't created by "java" code.
1255
1256 // fill in as much stack trace as possible
1257 int max_chunks = MIN2(methods->length(), (int)MaxJavaStackTraceDepth);
1258 int chunk_count = 0;
1259
1260 for (;!st.at_end(); st.next()) {
1261 // add element
1262 bcis->ushort_at_put(chunk_count, st.bci());
1263 methods->obj_at_put(chunk_count, st.method());
1264
1265 chunk_count++;
1266
1267 // Bail-out for deep stacks
1268 if (chunk_count >= max_chunks) break;
1269 }
1270 }
1271
1272
1273 int java_lang_Throwable::get_stack_trace_depth(oop throwable, TRAPS) {
1274 if (throwable == NULL) {
1275 THROW_0(vmSymbols::java_lang_NullPointerException());
1276 }
1277 objArrayOop chunk = objArrayOop(backtrace(throwable));
1278 int depth = 0;
1279 if (chunk != NULL) {
1280 // Iterate over chunks and count full ones
1281 while (true) {
1282 objArrayOop next = objArrayOop(chunk->obj_at(trace_next_offset));
1283 if (next == NULL) break;
1284 depth += trace_chunk_size;
1285 chunk = next;
1286 }
1287 assert(chunk != NULL && chunk->obj_at(trace_next_offset) == NULL, "sanity check");
1288 // Count element in remaining partial chunk
1289 objArrayOop methods = objArrayOop(chunk->obj_at(trace_methods_offset));
1290 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1291 assert(methods != NULL && bcis != NULL, "sanity check");
1292 for (int i = 0; i < methods->length(); i++) {
1293 if (methods->obj_at(i) == NULL) break;
1294 depth++;
1295 }
1296 }
1297 return depth;
1298 }
1299
1300
1301 oop java_lang_Throwable::get_stack_trace_element(oop throwable, int index, TRAPS) {
1302 if (throwable == NULL) {
1303 THROW_0(vmSymbols::java_lang_NullPointerException());
1304 }
1305 if (index < 0) {
1306 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1307 }
1308 // Compute how many chunks to skip and index into actual chunk
1309 objArrayOop chunk = objArrayOop(backtrace(throwable));
1310 int skip_chunks = index / trace_chunk_size;
1311 int chunk_index = index % trace_chunk_size;
1312 while (chunk != NULL && skip_chunks > 0) {
1313 chunk = objArrayOop(chunk->obj_at(trace_next_offset));
1314 skip_chunks--;
1315 }
1316 if (chunk == NULL) {
1317 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1318 }
1319 // Get method,bci from chunk
1320 objArrayOop methods = objArrayOop(chunk->obj_at(trace_methods_offset));
1321 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1322 assert(methods != NULL && bcis != NULL, "sanity check");
1323 methodHandle method(THREAD, methodOop(methods->obj_at(chunk_index)));
1324 int bci = bcis->ushort_at(chunk_index);
1325 // Chunk can be partial full
1326 if (method.is_null()) {
1327 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1328 }
1329
1330 oop element = java_lang_StackTraceElement::create(method, bci, CHECK_0);
1331 return element;
1332 }
1333
1334 oop java_lang_StackTraceElement::create(methodHandle method, int bci, TRAPS) {
1335 // SystemDictionary::stackTraceElement_klass() will be null for pre-1.4 JDKs
1336 assert(JDK_Version::is_gte_jdk14x_version(), "should only be called in >= 1.4");
1337
1338 // Allocate java.lang.StackTraceElement instance
1339 klassOop k = SystemDictionary::stackTraceElement_klass();
1340 instanceKlassHandle ik (THREAD, k);
1341 if (ik->should_be_initialized()) {
1342 ik->initialize(CHECK_0);
1343 }
1344
1345 Handle element = ik->allocate_instance_handle(CHECK_0);
1346 // Fill in class name
1347 ResourceMark rm(THREAD);
1348 const char* str = instanceKlass::cast(method->method_holder())->external_name();
1349 oop classname = StringTable::intern((char*) str, CHECK_0);
1350 java_lang_StackTraceElement::set_declaringClass(element(), classname);
1351 // Fill in method name
1352 oop methodname = StringTable::intern(method->name(), CHECK_0);
1353 java_lang_StackTraceElement::set_methodName(element(), methodname);
1354 // Fill in source file name
1355 symbolOop source = instanceKlass::cast(method->method_holder())->source_file_name();
1356 oop filename = StringTable::intern(source, CHECK_0);
1357 java_lang_StackTraceElement::set_fileName(element(), filename);
1358 // File in source line number
1359 int line_number;
1360 if (method->is_native()) {
1361 // Negative value different from -1 below, enabling Java code in
1362 // class java.lang.StackTraceElement to distinguish "native" from
1363 // "no LineNumberTable".
1364 line_number = -2;
1365 } else {
1366 // Returns -1 if no LineNumberTable, and otherwise actual line number
1367 line_number = method->line_number_from_bci(bci);
1368 }
1369 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
1370
1371 return element();
1372 }
1373
1374
1375 void java_lang_reflect_AccessibleObject::compute_offsets() {
1376 klassOop k = SystemDictionary::reflect_accessible_object_klass();
1377 COMPUTE_OFFSET("java.lang.reflect.AccessibleObject", override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature());
1378 }
1379
1380 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
1381 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1382 return (jboolean) reflect->bool_field(override_offset);
1383 }
1384
1385 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
1386 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1387 reflect->bool_field_put(override_offset, (int) value);
1388 }
1389
1390 void java_lang_reflect_Method::compute_offsets() {
1391 klassOop k = SystemDictionary::reflect_method_klass();
1392 COMPUTE_OFFSET("java.lang.reflect.Method", clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
1393 COMPUTE_OFFSET("java.lang.reflect.Method", name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1394 COMPUTE_OFFSET("java.lang.reflect.Method", returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature());
1395 COMPUTE_OFFSET("java.lang.reflect.Method", parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
1396 COMPUTE_OFFSET("java.lang.reflect.Method", exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
1397 COMPUTE_OFFSET("java.lang.reflect.Method", slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
1398 COMPUTE_OFFSET("java.lang.reflect.Method", modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
1399 // The generic signature and annotations fields are only present in 1.5
1400 signature_offset = -1;
1401 annotations_offset = -1;
1402 parameter_annotations_offset = -1;
1403 annotation_default_offset = -1;
1404 COMPUTE_OPTIONAL_OFFSET("java.lang.reflect.Method", signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
1405 COMPUTE_OPTIONAL_OFFSET("java.lang.reflect.Method", annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
1406 COMPUTE_OPTIONAL_OFFSET("java.lang.reflect.Method", parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
1407 COMPUTE_OPTIONAL_OFFSET("java.lang.reflect.Method", annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature());
1408 }
1409
1410 Handle java_lang_reflect_Method::create(TRAPS) {
1411 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1412 klassOop klass = SystemDictionary::reflect_method_klass();
1413 // This class is eagerly initialized during VM initialization, since we keep a refence
1414 // to one of the methods
1415 assert(instanceKlass::cast(klass)->is_initialized(), "must be initialized");
1416 return instanceKlass::cast(klass)->allocate_instance_handle(CHECK_NH);
1417 }
1418
1419 oop java_lang_reflect_Method::clazz(oop reflect) {
1420 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1421 return reflect->obj_field(clazz_offset);
1422 }
1423
1424 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
1425 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1426 reflect->obj_field_put(clazz_offset, value);
1427 }
1428
1429 int java_lang_reflect_Method::slot(oop reflect) {
1430 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1431 return reflect->int_field(slot_offset);
1432 }
1433
1434 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
1435 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1436 reflect->int_field_put(slot_offset, value);
1437 }
1438
1439 oop java_lang_reflect_Method::name(oop method) {
1440 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1441 return method->obj_field(name_offset);
1442 }
1443
1444 void java_lang_reflect_Method::set_name(oop method, oop value) {
1445 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1446 method->obj_field_put(name_offset, value);
1447 }
1448
1449 oop java_lang_reflect_Method::return_type(oop method) {
1450 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1451 return method->obj_field(returnType_offset);
1452 }
1453
1454 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
1455 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1456 method->obj_field_put(returnType_offset, value);
1457 }
1458
1459 oop java_lang_reflect_Method::parameter_types(oop method) {
1460 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1461 return method->obj_field(parameterTypes_offset);
1462 }
1463
1464 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
1465 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1466 method->obj_field_put(parameterTypes_offset, value);
1467 }
1468
1469 oop java_lang_reflect_Method::exception_types(oop method) {
1470 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1471 return method->obj_field(exceptionTypes_offset);
1472 }
1473
1474 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
1475 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1476 method->obj_field_put(exceptionTypes_offset, value);
1477 }
1478
1479 int java_lang_reflect_Method::modifiers(oop method) {
1480 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1481 return method->int_field(modifiers_offset);
1482 }
1483
1484 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
1485 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1486 method->int_field_put(modifiers_offset, value);
1487 }
1488
1489 bool java_lang_reflect_Method::has_signature_field() {
1490 return (signature_offset >= 0);
1491 }
1492
1493 oop java_lang_reflect_Method::signature(oop method) {
1494 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1495 assert(has_signature_field(), "signature field must be present");
1496 return method->obj_field(signature_offset);
1497 }
1498
1499 void java_lang_reflect_Method::set_signature(oop method, oop value) {
1500 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1501 assert(has_signature_field(), "signature field must be present");
1502 method->obj_field_put(signature_offset, value);
1503 }
1504
1505 bool java_lang_reflect_Method::has_annotations_field() {
1506 return (annotations_offset >= 0);
1507 }
1508
1509 oop java_lang_reflect_Method::annotations(oop method) {
1510 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1511 assert(has_annotations_field(), "annotations field must be present");
1512 return method->obj_field(annotations_offset);
1513 }
1514
1515 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
1516 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1517 assert(has_annotations_field(), "annotations field must be present");
1518 method->obj_field_put(annotations_offset, value);
1519 }
1520
1521 bool java_lang_reflect_Method::has_parameter_annotations_field() {
1522 return (parameter_annotations_offset >= 0);
1523 }
1524
1525 oop java_lang_reflect_Method::parameter_annotations(oop method) {
1526 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1527 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
1528 return method->obj_field(parameter_annotations_offset);
1529 }
1530
1531 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
1532 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1533 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
1534 method->obj_field_put(parameter_annotations_offset, value);
1535 }
1536
1537 bool java_lang_reflect_Method::has_annotation_default_field() {
1538 return (annotation_default_offset >= 0);
1539 }
1540
1541 oop java_lang_reflect_Method::annotation_default(oop method) {
1542 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1543 assert(has_annotation_default_field(), "annotation default field must be present");
1544 return method->obj_field(annotation_default_offset);
1545 }
1546
1547 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
1548 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1549 assert(has_annotation_default_field(), "annotation default field must be present");
1550 method->obj_field_put(annotation_default_offset, value);
1551 }
1552
1553 void java_lang_reflect_Constructor::compute_offsets() {
1554 klassOop k = SystemDictionary::reflect_constructor_klass();
1555 COMPUTE_OFFSET("java.lang.reflect.Constructor", clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
1556 COMPUTE_OFFSET("java.lang.reflect.Constructor", parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
1557 COMPUTE_OFFSET("java.lang.reflect.Constructor", exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
1558 COMPUTE_OFFSET("java.lang.reflect.Constructor", slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
1559 COMPUTE_OFFSET("java.lang.reflect.Constructor", modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
1560 // The generic signature and annotations fields are only present in 1.5
1561 signature_offset = -1;
1562 annotations_offset = -1;
1563 parameter_annotations_offset = -1;
1564 COMPUTE_OPTIONAL_OFFSET("java.lang.reflect.Constructor", signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
1565 COMPUTE_OPTIONAL_OFFSET("java.lang.reflect.Constructor", annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
1566 COMPUTE_OPTIONAL_OFFSET("java.lang.reflect.Constructor", parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
1567 }
1568
1569 Handle java_lang_reflect_Constructor::create(TRAPS) {
1570 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1571 symbolHandle name = vmSymbolHandles::java_lang_reflect_Constructor();
1572 klassOop k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
1573 instanceKlassHandle klass (THREAD, k);
1574 // Ensure it is initialized
1575 klass->initialize(CHECK_NH);
1576 return klass->allocate_instance_handle(CHECK_NH);
1577 }
1578
1579 oop java_lang_reflect_Constructor::clazz(oop reflect) {
1580 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1581 return reflect->obj_field(clazz_offset);
1582 }
1583
1584 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
1585 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1586 reflect->obj_field_put(clazz_offset, value);
1587 }
1588
1589 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
1590 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1591 return constructor->obj_field(parameterTypes_offset);
1592 }
1593
1594 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
1595 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1596 constructor->obj_field_put(parameterTypes_offset, value);
1597 }
1598
1599 oop java_lang_reflect_Constructor::exception_types(oop constructor) {
1600 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1601 return constructor->obj_field(exceptionTypes_offset);
1602 }
1603
1604 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
1605 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1606 constructor->obj_field_put(exceptionTypes_offset, value);
1607 }
1608
1609 int java_lang_reflect_Constructor::slot(oop reflect) {
1610 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1611 return reflect->int_field(slot_offset);
1612 }
1613
1614 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
1615 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1616 reflect->int_field_put(slot_offset, value);
1617 }
1618
1619 int java_lang_reflect_Constructor::modifiers(oop constructor) {
1620 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1621 return constructor->int_field(modifiers_offset);
1622 }
1623
1624 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
1625 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1626 constructor->int_field_put(modifiers_offset, value);
1627 }
1628
1629 bool java_lang_reflect_Constructor::has_signature_field() {
1630 return (signature_offset >= 0);
1631 }
1632
1633 oop java_lang_reflect_Constructor::signature(oop constructor) {
1634 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1635 assert(has_signature_field(), "signature field must be present");
1636 return constructor->obj_field(signature_offset);
1637 }
1638
1639 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
1640 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1641 assert(has_signature_field(), "signature field must be present");
1642 constructor->obj_field_put(signature_offset, value);
1643 }
1644
1645 bool java_lang_reflect_Constructor::has_annotations_field() {
1646 return (annotations_offset >= 0);
1647 }
1648
1649 oop java_lang_reflect_Constructor::annotations(oop constructor) {
1650 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1651 assert(has_annotations_field(), "annotations field must be present");
1652 return constructor->obj_field(annotations_offset);
1653 }
1654
1655 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
1656 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1657 assert(has_annotations_field(), "annotations field must be present");
1658 constructor->obj_field_put(annotations_offset, value);
1659 }
1660
1661 bool java_lang_reflect_Constructor::has_parameter_annotations_field() {
1662 return (parameter_annotations_offset >= 0);
1663 }
1664
1665 oop java_lang_reflect_Constructor::parameter_annotations(oop method) {
1666 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1667 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
1668 return method->obj_field(parameter_annotations_offset);
1669 }
1670
1671 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
1672 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1673 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
1674 method->obj_field_put(parameter_annotations_offset, value);
1675 }
1676
1677 void java_lang_reflect_Field::compute_offsets() {
1678 klassOop k = SystemDictionary::reflect_field_klass();
1679 COMPUTE_OFFSET("java.lang.reflect.Field", clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
1680 COMPUTE_OFFSET("java.lang.reflect.Field", name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1681 COMPUTE_OFFSET("java.lang.reflect.Field", type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature());
1682 COMPUTE_OFFSET("java.lang.reflect.Field", slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
1683 COMPUTE_OFFSET("java.lang.reflect.Field", modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
1684 // The generic signature and annotations fields are only present in 1.5
1685 signature_offset = -1;
1686 annotations_offset = -1;
1687 COMPUTE_OPTIONAL_OFFSET("java.lang.reflect.Field", signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
1688 COMPUTE_OPTIONAL_OFFSET("java.lang.reflect.Field", annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
1689 }
1690
1691 Handle java_lang_reflect_Field::create(TRAPS) {
1692 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1693 symbolHandle name = vmSymbolHandles::java_lang_reflect_Field();
1694 klassOop k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
1695 instanceKlassHandle klass (THREAD, k);
1696 // Ensure it is initialized
1697 klass->initialize(CHECK_NH);
1698 return klass->allocate_instance_handle(CHECK_NH);
1699 }
1700
1701 oop java_lang_reflect_Field::clazz(oop reflect) {
1702 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1703 return reflect->obj_field(clazz_offset);
1704 }
1705
1706 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
1707 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1708 reflect->obj_field_put(clazz_offset, value);
1709 }
1710
1711 oop java_lang_reflect_Field::name(oop field) {
1712 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1713 return field->obj_field(name_offset);
1714 }
1715
1716 void java_lang_reflect_Field::set_name(oop field, oop value) {
1717 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1718 field->obj_field_put(name_offset, value);
1719 }
1720
1721 oop java_lang_reflect_Field::type(oop field) {
1722 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1723 return field->obj_field(type_offset);
1724 }
1725
1726 void java_lang_reflect_Field::set_type(oop field, oop value) {
1727 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1728 field->obj_field_put(type_offset, value);
1729 }
1730
1731 int java_lang_reflect_Field::slot(oop reflect) {
1732 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1733 return reflect->int_field(slot_offset);
1734 }
1735
1736 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
1737 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1738 reflect->int_field_put(slot_offset, value);
1739 }
1740
1741 int java_lang_reflect_Field::modifiers(oop field) {
1742 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1743 return field->int_field(modifiers_offset);
1744 }
1745
1746 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
1747 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1748 field->int_field_put(modifiers_offset, value);
1749 }
1750
1751 bool java_lang_reflect_Field::has_signature_field() {
1752 return (signature_offset >= 0);
1753 }
1754
1755 oop java_lang_reflect_Field::signature(oop field) {
1756 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1757 assert(has_signature_field(), "signature field must be present");
1758 return field->obj_field(signature_offset);
1759 }
1760
1761 void java_lang_reflect_Field::set_signature(oop field, oop value) {
1762 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1763 assert(has_signature_field(), "signature field must be present");
1764 field->obj_field_put(signature_offset, value);
1765 }
1766
1767 bool java_lang_reflect_Field::has_annotations_field() {
1768 return (annotations_offset >= 0);
1769 }
1770
1771 oop java_lang_reflect_Field::annotations(oop field) {
1772 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1773 assert(has_annotations_field(), "annotations field must be present");
1774 return field->obj_field(annotations_offset);
1775 }
1776
1777 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
1778 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1779 assert(has_annotations_field(), "annotations field must be present");
1780 field->obj_field_put(annotations_offset, value);
1781 }
1782
1783
1784 void sun_reflect_ConstantPool::compute_offsets() {
1785 klassOop k = SystemDictionary::reflect_constant_pool_klass();
1786 // This null test can be removed post beta
1787 if (k != NULL) {
1788 COMPUTE_OFFSET("sun.reflect.ConstantPool", _cp_oop_offset, k, vmSymbols::constantPoolOop_name(), vmSymbols::object_signature());
1789 }
1790 }
1791
1792
1793 Handle sun_reflect_ConstantPool::create(TRAPS) {
1794 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1795 klassOop k = SystemDictionary::reflect_constant_pool_klass();
1796 instanceKlassHandle klass (THREAD, k);
1797 // Ensure it is initialized
1798 klass->initialize(CHECK_NH);
1799 return klass->allocate_instance_handle(CHECK_NH);
1800 }
1801
1802
1803 oop sun_reflect_ConstantPool::cp_oop(oop reflect) {
1804 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1805 return reflect->obj_field(_cp_oop_offset);
1806 }
1807
1808
1809 void sun_reflect_ConstantPool::set_cp_oop(oop reflect, oop value) {
1810 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1811 reflect->obj_field_put(_cp_oop_offset, value);
1812 }
1813
1814 void sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
1815 klassOop k = SystemDictionary::reflect_unsafe_static_field_accessor_impl_klass();
1816 // This null test can be removed post beta
1817 if (k != NULL) {
1818 COMPUTE_OFFSET("sun.reflect.UnsafeStaticFieldAccessorImpl", _base_offset, k,
1819 vmSymbols::base_name(), vmSymbols::object_signature());
1820 }
1821 }
1822
1823 oop java_lang_boxing_object::initialize_and_allocate(klassOop k, TRAPS) {
1824 instanceKlassHandle h (THREAD, k);
1825 if (!h->is_initialized()) h->initialize(CHECK_0);
1826 return h->allocate_instance(THREAD);
1827 }
1828
1829
1830 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
1831 oop box;
1832 switch (type) {
1833 case T_BOOLEAN:
1834 box = initialize_and_allocate(SystemDictionary::boolean_klass(), CHECK_0);
1835 box->bool_field_put(value_offset, value->z);
1836 break;
1837 case T_CHAR:
1838 box = initialize_and_allocate(SystemDictionary::char_klass(), CHECK_0);
1839 box->char_field_put(value_offset, value->c);
1840 break;
1841 case T_FLOAT:
1842 box = initialize_and_allocate(SystemDictionary::float_klass(), CHECK_0);
1843 box->float_field_put(value_offset, value->f);
1844 break;
1845 case T_DOUBLE:
1846 box = initialize_and_allocate(SystemDictionary::double_klass(), CHECK_0);
1847 box->double_field_put(value_offset, value->d);
1848 break;
1849 case T_BYTE:
1850 box = initialize_and_allocate(SystemDictionary::byte_klass(), CHECK_0);
1851 box->byte_field_put(value_offset, value->b);
1852 break;
1853 case T_SHORT:
1854 box = initialize_and_allocate(SystemDictionary::short_klass(), CHECK_0);
1855 box->short_field_put(value_offset, value->s);
1856 break;
1857 case T_INT:
1858 box = initialize_and_allocate(SystemDictionary::int_klass(), CHECK_0);
1859 box->int_field_put(value_offset, value->i);
1860 break;
1861 case T_LONG:
1862 box = initialize_and_allocate(SystemDictionary::long_klass(), CHECK_0);
1863 box->long_field_put(value_offset, value->j);
1864 break;
1865 default:
1866 return NULL;
1867 }
1868 return box;
1869 }
1870
1871
1872 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
1873 klassOop k = box->klass();
1874 if (k == SystemDictionary::boolean_klass()) {
1875 value->z = box->bool_field(value_offset);
1876 return T_BOOLEAN;
1877 }
1878 if (k == SystemDictionary::char_klass()) {
1879 value->c = box->char_field(value_offset);
1880 return T_CHAR;
1881 }
1882 if (k == SystemDictionary::float_klass()) {
1883 value->f = box->float_field(value_offset);
1884 return T_FLOAT;
1885 }
1886 if (k == SystemDictionary::double_klass()) {
1887 value->d = box->double_field(value_offset);
1888 return T_DOUBLE;
1889 }
1890 if (k == SystemDictionary::byte_klass()) {
1891 value->b = box->byte_field(value_offset);
1892 return T_BYTE;
1893 }
1894 if (k == SystemDictionary::short_klass()) {
1895 value->s = box->short_field(value_offset);
1896 return T_SHORT;
1897 }
1898 if (k == SystemDictionary::int_klass()) {
1899 value->i = box->int_field(value_offset);
1900 return T_INT;
1901 }
1902 if (k == SystemDictionary::long_klass()) {
1903 value->j = box->long_field(value_offset);
1904 return T_LONG;
1905 }
1906 return T_ILLEGAL;
1907 }
1908
1909
1910 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
1911 klassOop k = box->klass();
1912 if (k == SystemDictionary::boolean_klass()) {
1913 box->bool_field_put(value_offset, value->z);
1914 return T_BOOLEAN;
1915 }
1916 if (k == SystemDictionary::char_klass()) {
1917 box->char_field_put(value_offset, value->c);
1918 return T_CHAR;
1919 }
1920 if (k == SystemDictionary::float_klass()) {
1921 box->float_field_put(value_offset, value->f);
1922 return T_FLOAT;
1923 }
1924 if (k == SystemDictionary::double_klass()) {
1925 box->double_field_put(value_offset, value->d);
1926 return T_DOUBLE;
1927 }
1928 if (k == SystemDictionary::byte_klass()) {
1929 box->byte_field_put(value_offset, value->b);
1930 return T_BYTE;
1931 }
1932 if (k == SystemDictionary::short_klass()) {
1933 box->short_field_put(value_offset, value->s);
1934 return T_SHORT;
1935 }
1936 if (k == SystemDictionary::int_klass()) {
1937 box->int_field_put(value_offset, value->i);
1938 return T_INT;
1939 }
1940 if (k == SystemDictionary::long_klass()) {
1941 box->long_field_put(value_offset, value->j);
1942 return T_LONG;
1943 }
1944 return T_ILLEGAL;
1945 }
1946
1947
1948 // Support for java_lang_ref_Reference
1949
1950 void java_lang_ref_Reference::set_referent(oop ref, oop value) {
1951 ref->obj_field_put(referent_offset, value);
1952 }
1953
1954 oop* java_lang_ref_Reference::referent_addr(oop ref) {
1955 return ref->obj_field_addr(referent_offset);
1956 }
1957
1958 void java_lang_ref_Reference::set_next(oop ref, oop value) {
1959 ref->obj_field_put(next_offset, value);
1960 }
1961
1962 oop* java_lang_ref_Reference::next_addr(oop ref) {
1963 return ref->obj_field_addr(next_offset);
1964 }
1965
1966 void java_lang_ref_Reference::set_discovered(oop ref, oop value) {
1967 ref->obj_field_put(discovered_offset, value);
1968 }
1969
1970 oop* java_lang_ref_Reference::discovered_addr(oop ref) {
1971 return ref->obj_field_addr(discovered_offset);
1972 }
1973
1974 oop* java_lang_ref_Reference::pending_list_lock_addr() {
1975 instanceKlass* ik = instanceKlass::cast(SystemDictionary::reference_klass());
1976 return (oop*)(((char *)ik->start_of_static_fields()) + static_lock_offset);
1977 }
1978
1979 oop* java_lang_ref_Reference::pending_list_addr() {
1980 instanceKlass* ik = instanceKlass::cast(SystemDictionary::reference_klass());
1981 return (oop *)(((char *)ik->start_of_static_fields()) + static_pending_offset);
1982 }
1983
1984
1985 // Support for java_lang_ref_SoftReference
1986
1987 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
1988 return ref->long_field(timestamp_offset);
1989 }
1990
1991 jlong java_lang_ref_SoftReference::clock() {
1992 instanceKlass* ik = instanceKlass::cast(SystemDictionary::soft_reference_klass());
1993 int offset = ik->offset_of_static_fields() + static_clock_offset;
1994
1995 return SystemDictionary::soft_reference_klass()->long_field(offset);
1996 }
1997
1998 void java_lang_ref_SoftReference::set_clock(jlong value) {
1999 instanceKlass* ik = instanceKlass::cast(SystemDictionary::soft_reference_klass());
2000 int offset = ik->offset_of_static_fields() + static_clock_offset;
2001
2002 SystemDictionary::soft_reference_klass()->long_field_put(offset, value);
2003 }
2004
2005
2006 // Support for java_security_AccessControlContext
2007
2008 int java_security_AccessControlContext::_context_offset = 0;
2009 int java_security_AccessControlContext::_privilegedContext_offset = 0;
2010 int java_security_AccessControlContext::_isPrivileged_offset = 0;
2011
2012
2013 void java_security_AccessControlContext::compute_offsets() {
2014 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
2015 fieldDescriptor fd;
2016 instanceKlass* ik = instanceKlass::cast(SystemDictionary::AccessControlContext_klass());
2017
2018 if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) {
2019 fatal("Invalid layout of java.security.AccessControlContext");
2020 }
2021 _context_offset = fd.offset();
2022
2023 if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) {
2024 fatal("Invalid layout of java.security.AccessControlContext");
2025 }
2026 _privilegedContext_offset = fd.offset();
2027
2028 if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) {
2029 fatal("Invalid layout of java.security.AccessControlContext");
2030 }
2031 _isPrivileged_offset = fd.offset();
2032 }
2033
2034
2035 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
2036 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
2037 // Ensure klass is initialized
2038 instanceKlass::cast(SystemDictionary::AccessControlContext_klass())->initialize(CHECK_0);
2039 // Allocate result
2040 oop result = instanceKlass::cast(SystemDictionary::AccessControlContext_klass())->allocate_instance(CHECK_0);
2041 // Fill in values
2042 result->obj_field_put(_context_offset, context());
2043 result->obj_field_put(_privilegedContext_offset, privileged_context());
2044 result->bool_field_put(_isPrivileged_offset, isPrivileged);
2045 return result;
2046 }
2047
2048
2049 // Support for java_lang_ClassLoader
2050
2051 oop java_lang_ClassLoader::parent(oop loader) {
2052 assert(loader->is_oop(), "loader must be oop");
2053 return loader->obj_field(parent_offset);
2054 }
2055
2056
2057 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
2058 // Fix for 4474172; see evaluation for more details
2059 loader = non_reflection_class_loader(loader);
2060
2061 oop cl = SystemDictionary::java_system_loader();
2062 while(cl != NULL) {
2063 if (cl == loader) return true;
2064 cl = parent(cl);
2065 }
2066 return false;
2067 }
2068
2069 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
2070 if (loader != NULL) {
2071 // See whether this is one of the class loaders associated with
2072 // the generated bytecodes for reflection, and if so, "magically"
2073 // delegate to its parent to prevent class loading from occurring
2074 // in places where applications using reflection didn't expect it.
2075 klassOop delegating_cl_class = SystemDictionary::reflect_delegating_classloader_klass();
2076 // This might be null in non-1.4 JDKs
2077 if (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)) {
2078 return parent(loader);
2079 }
2080 }
2081 return loader;
2082 }
2083
2084
2085 // Support for java_lang_System
2086
2087 void java_lang_System::compute_offsets() {
2088 assert(offset_of_static_fields == 0, "offsets should be initialized only once");
2089
2090 instanceKlass* ik = instanceKlass::cast(SystemDictionary::system_klass());
2091 offset_of_static_fields = ik->offset_of_static_fields();
2092 }
2093
2094 int java_lang_System::in_offset_in_bytes() {
2095 return (offset_of_static_fields + static_in_offset);
2096 }
2097
2098
2099 int java_lang_System::out_offset_in_bytes() {
2100 return (offset_of_static_fields + static_out_offset);
2101 }
2102
2103
2104 int java_lang_System::err_offset_in_bytes() {
2105 return (offset_of_static_fields + static_err_offset);
2106 }
2107
2108
2109
2110 int java_lang_String::value_offset;
2111 int java_lang_String::offset_offset;
2112 int java_lang_String::count_offset;
2113 int java_lang_String::hash_offset;
2114 int java_lang_Class::klass_offset;
2115 int java_lang_Class::array_klass_offset;
2116 int java_lang_Class::resolved_constructor_offset;
2117 int java_lang_Class::number_of_fake_oop_fields;
2118 int java_lang_Throwable::backtrace_offset;
2119 int java_lang_Throwable::detailMessage_offset;
2120 int java_lang_Throwable::cause_offset;
2121 int java_lang_Throwable::stackTrace_offset;
2122 int java_lang_reflect_AccessibleObject::override_offset;
2123 int java_lang_reflect_Method::clazz_offset;
2124 int java_lang_reflect_Method::name_offset;
2125 int java_lang_reflect_Method::returnType_offset;
2126 int java_lang_reflect_Method::parameterTypes_offset;
2127 int java_lang_reflect_Method::exceptionTypes_offset;
2128 int java_lang_reflect_Method::slot_offset;
2129 int java_lang_reflect_Method::modifiers_offset;
2130 int java_lang_reflect_Method::signature_offset;
2131 int java_lang_reflect_Method::annotations_offset;
2132 int java_lang_reflect_Method::parameter_annotations_offset;
2133 int java_lang_reflect_Method::annotation_default_offset;
2134 int java_lang_reflect_Constructor::clazz_offset;
2135 int java_lang_reflect_Constructor::parameterTypes_offset;
2136 int java_lang_reflect_Constructor::exceptionTypes_offset;
2137 int java_lang_reflect_Constructor::slot_offset;
2138 int java_lang_reflect_Constructor::modifiers_offset;
2139 int java_lang_reflect_Constructor::signature_offset;
2140 int java_lang_reflect_Constructor::annotations_offset;
2141 int java_lang_reflect_Constructor::parameter_annotations_offset;
2142 int java_lang_reflect_Field::clazz_offset;
2143 int java_lang_reflect_Field::name_offset;
2144 int java_lang_reflect_Field::type_offset;
2145 int java_lang_reflect_Field::slot_offset;
2146 int java_lang_reflect_Field::modifiers_offset;
2147 int java_lang_reflect_Field::signature_offset;
2148 int java_lang_reflect_Field::annotations_offset;
2149 int java_lang_boxing_object::value_offset;
2150 int java_lang_ref_Reference::referent_offset;
2151 int java_lang_ref_Reference::queue_offset;
2152 int java_lang_ref_Reference::next_offset;
2153 int java_lang_ref_Reference::discovered_offset;
2154 int java_lang_ref_Reference::static_lock_offset;
2155 int java_lang_ref_Reference::static_pending_offset;
2156 int java_lang_ref_Reference::number_of_fake_oop_fields;
2157 int java_lang_ref_SoftReference::timestamp_offset;
2158 int java_lang_ref_SoftReference::static_clock_offset;
2159 int java_lang_ClassLoader::parent_offset;
2160 int java_lang_System::offset_of_static_fields;
2161 int java_lang_System::static_in_offset;
2162 int java_lang_System::static_out_offset;
2163 int java_lang_System::static_err_offset;
2164 int java_lang_StackTraceElement::declaringClass_offset;
2165 int java_lang_StackTraceElement::methodName_offset;
2166 int java_lang_StackTraceElement::fileName_offset;
2167 int java_lang_StackTraceElement::lineNumber_offset;
2168 int java_lang_AssertionStatusDirectives::classes_offset;
2169 int java_lang_AssertionStatusDirectives::classEnabled_offset;
2170 int java_lang_AssertionStatusDirectives::packages_offset;
2171 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
2172 int java_lang_AssertionStatusDirectives::deflt_offset;
2173 int java_nio_Buffer::_limit_offset;
2174 int sun_misc_AtomicLongCSImpl::_value_offset;
2175 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0;
2176 int sun_reflect_ConstantPool::_cp_oop_offset;
2177 int sun_reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
2178
2179
2180 // Support for java_lang_StackTraceElement
2181
2182 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
2183 element->obj_field_put(fileName_offset, value);
2184 }
2185
2186 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
2187 element->obj_field_put(declaringClass_offset, value);
2188 }
2189
2190 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
2191 element->obj_field_put(methodName_offset, value);
2192 }
2193
2194 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
2195 element->int_field_put(lineNumber_offset, value);
2196 }
2197
2198
2199 // Support for java Assertions - java_lang_AssertionStatusDirectives.
2200
2201 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
2202 o->obj_field_put(classes_offset, val);
2203 }
2204
2205 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
2206 o->obj_field_put(classEnabled_offset, val);
2207 }
2208
2209 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
2210 o->obj_field_put(packages_offset, val);
2211 }
2212
2213 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
2214 o->obj_field_put(packageEnabled_offset, val);
2215 }
2216
2217 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
2218 o->bool_field_put(deflt_offset, val);
2219 }
2220
2221
2222 // Support for intrinsification of java.nio.Buffer.checkIndex
2223 int java_nio_Buffer::limit_offset() {
2224 return _limit_offset;
2225 }
2226
2227
2228 void java_nio_Buffer::compute_offsets() {
2229 klassOop k = SystemDictionary::java_nio_Buffer_klass();
2230 COMPUTE_OFFSET("java.nio.Buffer", _limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature());
2231 }
2232
2233 // Support for intrinsification of sun.misc.AtomicLongCSImpl.attemptUpdate
2234 int sun_misc_AtomicLongCSImpl::value_offset() {
2235 assert(SystemDictionary::sun_misc_AtomicLongCSImpl_klass() != NULL, "can't call this");
2236 return _value_offset;
2237 }
2238
2239
2240 void sun_misc_AtomicLongCSImpl::compute_offsets() {
2241 klassOop k = SystemDictionary::sun_misc_AtomicLongCSImpl_klass();
2242 // If this class is not present, its value field offset won't be referenced.
2243 if (k != NULL) {
2244 COMPUTE_OFFSET("sun.misc.AtomicLongCSImpl", _value_offset, k, vmSymbols::value_name(), vmSymbols::long_signature());
2245 }
2246 }
2247
2248 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) {
2249 if (_owner_offset != 0) return;
2250
2251 assert(JDK_Version::is_gte_jdk16x_version(), "Must be JDK 1.6 or later");
2252 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK);
2253 klassOop k = SystemDictionary::abstract_ownable_synchronizer_klass();
2254 COMPUTE_OFFSET("java.util.concurrent.locks.AbstractOwnableSynchronizer", _owner_offset, k,
2255 vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature());
2256 }
2257
2258 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
2259 assert(_owner_offset != 0, "Must be initialized");
2260 return obj->obj_field(_owner_offset);
2261 }
2262
2263 // Compute hard-coded offsets
2264 // Invoked before SystemDictionary::initialize, so pre-loaded classes
2265 // are not available to determine the offset_of_static_fields.
2266 void JavaClasses::compute_hard_coded_offsets() {
2267 const int x = wordSize;
2268 const int header = instanceOopDesc::header_size_in_bytes();
2269
2270 // Do the String Class
2271 java_lang_String::value_offset = java_lang_String::hc_value_offset * x + header;
2272 java_lang_String::offset_offset = java_lang_String::hc_offset_offset * x + header;
2273 java_lang_String::count_offset = java_lang_String::offset_offset + sizeof (jint);
2274 java_lang_String::hash_offset = java_lang_String::count_offset + sizeof (jint);
2275
2276 // Do the Class Class
2277 java_lang_Class::klass_offset = java_lang_Class::hc_klass_offset * x + header;
2278 java_lang_Class::array_klass_offset = java_lang_Class::hc_array_klass_offset * x + header;
2279 java_lang_Class::resolved_constructor_offset = java_lang_Class::hc_resolved_constructor_offset * x + header;
2280
2281 // This is NOT an offset
2282 java_lang_Class::number_of_fake_oop_fields = java_lang_Class::hc_number_of_fake_oop_fields;
2283
2284 // Throwable Class
2285 java_lang_Throwable::backtrace_offset = java_lang_Throwable::hc_backtrace_offset * x + header;
2286 java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header;
2287 java_lang_Throwable::cause_offset = java_lang_Throwable::hc_cause_offset * x + header;
2288 java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header;
2289
2290 // java_lang_boxing_object
2291 java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset * x + header;
2292
2293 // java_lang_ref_Reference:
2294 java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header;
2295 java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header;
2296 java_lang_ref_Reference::next_offset = java_lang_ref_Reference::hc_next_offset * x + header;
2297 java_lang_ref_Reference::discovered_offset = java_lang_ref_Reference::hc_discovered_offset * x + header;
2298 java_lang_ref_Reference::static_lock_offset = java_lang_ref_Reference::hc_static_lock_offset * x;
2299 java_lang_ref_Reference::static_pending_offset = java_lang_ref_Reference::hc_static_pending_offset * x;
2300 // Artificial fields for java_lang_ref_Reference
2301 // The first field is for the discovered field added in 1.4
2302 java_lang_ref_Reference::number_of_fake_oop_fields = 1;
2303
2304 // java_lang_ref_SoftReference Class
2305 java_lang_ref_SoftReference::timestamp_offset = java_lang_ref_SoftReference::hc_timestamp_offset * x + header;
2306 // Don't multiply static fields because they are always in wordSize units
2307 java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x;
2308
2309 // java_lang_ClassLoader
2310 java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header;
2311
2312 // java_lang_System
2313 java_lang_System::static_in_offset = java_lang_System::hc_static_in_offset * x;
2314 java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x;
2315 java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x;
2316
2317 // java_lang_StackTraceElement
2318 java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset * x + header;
2319 java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header;
2320 java_lang_StackTraceElement::fileName_offset = java_lang_StackTraceElement::hc_fileName_offset * x + header;
2321 java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header;
2322 java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header;
2323 java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header;
2324 java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header;
2325 java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header;
2326 java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header;
2327
2328 }
2329
2330
2331 // Compute non-hard-coded field offsets of all the classes in this file
2332 void JavaClasses::compute_offsets() {
2333
2334 java_lang_Class::compute_offsets();
2335 java_lang_System::compute_offsets();
2336 java_lang_Thread::compute_offsets();
2337 java_lang_ThreadGroup::compute_offsets();
2338 java_security_AccessControlContext::compute_offsets();
2339 // Initialize reflection classes. The layouts of these classes
2340 // changed with the new reflection implementation in JDK 1.4, and
2341 // since the Universe doesn't know what JDK version it is until this
2342 // point we defer computation of these offsets until now.
2343 java_lang_reflect_AccessibleObject::compute_offsets();
2344 java_lang_reflect_Method::compute_offsets();
2345 java_lang_reflect_Constructor::compute_offsets();
2346 java_lang_reflect_Field::compute_offsets();
2347 if (JDK_Version::is_gte_jdk14x_version()) {
2348 java_nio_Buffer::compute_offsets();
2349 }
2350 if (JDK_Version::is_gte_jdk15x_version()) {
2351 sun_reflect_ConstantPool::compute_offsets();
2352 sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets();
2353 }
2354 sun_misc_AtomicLongCSImpl::compute_offsets();
2355 }
2356
2357 #ifndef PRODUCT
2358
2359 // These functions exist to assert the validity of hard-coded field offsets to guard
2360 // against changes in the class files
2361
2362 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
2363 EXCEPTION_MARK;
2364 fieldDescriptor fd;
2365 symbolHandle klass_sym = oopFactory::new_symbol_handle(klass_name, CATCH);
2366 klassOop k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
2367 instanceKlassHandle h_klass (THREAD, k);
2368 //instanceKlassHandle h_klass(klass);
2369 symbolHandle f_name = oopFactory::new_symbol_handle(field_name, CATCH);
2370 symbolHandle f_sig = oopFactory::new_symbol_handle(field_sig, CATCH);
2371 if (!h_klass->find_local_field(f_name(), f_sig(), &fd)) {
2372 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
2373 return false;
2374 }
2375 if (fd.is_static()) {
2376 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
2377 return false;
2378 }
2379 if (fd.offset() == hardcoded_offset ) {
2380 return true;
2381 } else {
2382 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
2383 klass_name, field_name, hardcoded_offset, fd.offset());
2384 return false;
2385 }
2386 }
2387
2388
2389 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
2390 EXCEPTION_MARK;
2391 fieldDescriptor fd;
2392 symbolHandle klass_sym = oopFactory::new_symbol_handle(klass_name, CATCH);
2393 klassOop k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
2394 instanceKlassHandle h_klass (THREAD, k);
2395 symbolHandle f_name = oopFactory::new_symbol_handle(field_name, CATCH);
2396 symbolHandle f_sig = oopFactory::new_symbol_handle(field_sig, CATCH);
2397 if (!h_klass->find_local_field(f_name(), f_sig(), &fd)) {
2398 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
2399 return false;
2400 }
2401 if (!fd.is_static()) {
2402 tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name);
2403 return false;
2404 }
2405 if (fd.offset() == hardcoded_offset + h_klass->offset_of_static_fields()) {
2406 return true;
2407 } else {
2408 tty->print_cr("Offset of static field %s.%s is hardcoded as %d but should really be %d.", klass_name, field_name, hardcoded_offset, fd.offset() - h_klass->offset_of_static_fields());
2409 return false;
2410 }
2411 }
2412
2413
2414 // Check the hard-coded field offsets of all the classes in this file
2415
2416 void JavaClasses::check_offsets() {
2417 bool valid = true;
2418
2419 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
2420 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
2421
2422 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
2423 valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig)
2424
2425 // java.lang.String
2426
2427 CHECK_OFFSET("java/lang/String", java_lang_String, value, "[C");
2428 CHECK_OFFSET("java/lang/String", java_lang_String, offset, "I");
2429 CHECK_OFFSET("java/lang/String", java_lang_String, count, "I");
2430 CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I");
2431
2432 // java.lang.Class
2433
2434 // Fake fields
2435 // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked
2436 // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked
2437 // CHECK_OFFSET("java/lang/Class", java_lang_Class, resolved_constructor); // %%% this needs to be checked
2438
2439 // java.lang.Throwable
2440
2441 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;");
2442 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;");
2443 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, cause, "Ljava/lang/Throwable;");
2444 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;");
2445
2446 // Boxed primitive objects (java_lang_boxing_object)
2447
2448 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
2449 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
2450 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
2451 CHECK_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
2452 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
2453 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
2454 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
2455 CHECK_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
2456
2457 // java.lang.ClassLoader
2458
2459 CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent, "Ljava/lang/ClassLoader;");
2460
2461 // java.lang.System
2462
2463 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, in, "Ljava/io/InputStream;");
2464 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;");
2465 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;");
2466
2467 // java.lang.StackTraceElement
2468
2469 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;");
2470 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;");
2471 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, fileName, "Ljava/lang/String;");
2472 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I");
2473
2474 // java.lang.ref.Reference
2475
2476 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
2477 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
2478 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
2479 // Fake field
2480 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
2481 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, lock, "Ljava/lang/ref/Reference$Lock;");
2482 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, pending, "Ljava/lang/ref/Reference;");
2483
2484 // java.lang.ref.SoftReference
2485
2486 CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J");
2487 CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J");
2488
2489 // java.lang.AssertionStatusDirectives
2490 //
2491 // The CheckAssertionStatusDirectives boolean can be removed from here and
2492 // globals.hpp after the AssertionStatusDirectives class has been integrated
2493 // into merlin "for some time." Without it, the vm will fail with early
2494 // merlin builds.
2495
2496 if (CheckAssertionStatusDirectives && JDK_Version::is_gte_jdk14x_version()) {
2497 const char* nm = "java/lang/AssertionStatusDirectives";
2498 const char* sig = "[Ljava/lang/String;";
2499 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig);
2500 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z");
2501 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig);
2502 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z");
2503 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z");
2504 }
2505
2506 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
2507 }
2508
2509 #endif // PRODUCT
2510
2511 void javaClasses_init() {
2512 JavaClasses::compute_offsets();
2513 JavaClasses::check_offsets();
2514 FilteredFieldsMap::initialize(); // must be done after computing offsets.
2515 }