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 routine for computing field offsets at run time rather than hardcoding them
29 static void
30 compute_offset(int &dest_offset,
31 klassOop klass_oop, symbolOop name_symbol, symbolOop signature_symbol) {
32 fieldDescriptor fd;
33 instanceKlass* ik = instanceKlass::cast(klass_oop);
34 if (!ik->find_local_field(name_symbol, signature_symbol, &fd)) {
35 ResourceMark rm;
36 tty->print_cr("Invalid layout of %s at %s", ik->external_name(), name_symbol->as_C_string());
37 fatal("Invalid layout of preloaded class");
38 }
39 dest_offset = fd.offset();
40 }
41
42 // Same as above but for "optional" offsets that might not be present in certain JDK versions
43 static void
44 compute_optional_offset(int& dest_offset,
45 klassOop klass_oop, symbolOop name_symbol, symbolOop signature_symbol) {
46 fieldDescriptor fd;
47 instanceKlass* ik = instanceKlass::cast(klass_oop);
48 if (ik->find_local_field(name_symbol, signature_symbol, &fd)) {
49 dest_offset = fd.offset();
50 }
51 }
52
53 Handle java_lang_String::basic_create(int length, bool tenured, TRAPS) {
54 // Create the String object first, so there's a chance that the String
55 // and the char array it points to end up in the same cache line.
56 oop obj;
57 if (tenured) {
58 obj = instanceKlass::cast(SystemDictionary::string_klass())->allocate_permanent_instance(CHECK_NH);
59 } else {
60 obj = instanceKlass::cast(SystemDictionary::string_klass())->allocate_instance(CHECK_NH);
61 }
62
63 // Create the char array. The String object must be handlized here
64 // because GC can happen as a result of the allocation attempt.
65 Handle h_obj(THREAD, obj);
66 typeArrayOop buffer;
67 if (tenured) {
68 buffer = oopFactory::new_permanent_charArray(length, CHECK_NH);
69 } else {
70 buffer = oopFactory::new_charArray(length, CHECK_NH);
71 }
72
73 // Point the String at the char array
74 obj = h_obj();
75 set_value(obj, buffer);
76 // No need to zero the offset, allocation zero'ed the entire String object
77 assert(offset(obj) == 0, "initial String offset should be zero");
78 //set_offset(obj, 0);
79 set_count(obj, length);
80
81 return h_obj;
82 }
83
84 Handle java_lang_String::basic_create_from_unicode(jchar* unicode, int length, bool tenured, TRAPS) {
85 Handle h_obj = basic_create(length, tenured, CHECK_NH);
86 typeArrayOop buffer = value(h_obj());
87 for (int index = 0; index < length; index++) {
88 buffer->char_at_put(index, unicode[index]);
89 }
90 return h_obj;
91 }
92
93 Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) {
94 return basic_create_from_unicode(unicode, length, false, CHECK_NH);
95 }
96
97 Handle java_lang_String::create_tenured_from_unicode(jchar* unicode, int length, TRAPS) {
98 return basic_create_from_unicode(unicode, length, true, CHECK_NH);
99 }
100
101 oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) {
102 Handle h_obj = basic_create_from_unicode(unicode, length, false, CHECK_0);
103 return h_obj();
104 }
105
106 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
107 if (utf8_str == NULL) {
108 return Handle();
109 }
110 int length = UTF8::unicode_length(utf8_str);
111 Handle h_obj = basic_create(length, false, CHECK_NH);
112 if (length > 0) {
113 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
114 }
115 return h_obj;
116 }
117
118 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
119 Handle h_obj = create_from_str(utf8_str, CHECK_0);
120 return h_obj();
121 }
122
123 Handle java_lang_String::create_from_symbol(symbolHandle symbol, TRAPS) {
124 int length = UTF8::unicode_length((char*)symbol->bytes(), symbol->utf8_length());
125 Handle h_obj = basic_create(length, false, CHECK_NH);
126 if (length > 0) {
127 UTF8::convert_to_unicode((char*)symbol->bytes(), value(h_obj())->char_at_addr(0), length);
128 }
129 return h_obj;
130 }
131
132 // Converts a C string to a Java String based on current encoding
133 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
134 assert(str != NULL, "bad arguments");
135
136 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *);
137 static to_java_string_fn_t _to_java_string_fn = NULL;
138
139 if (_to_java_string_fn == NULL) {
140 void *lib_handle = os::native_java_library();
141 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, hpi::dll_lookup(lib_handle, "NewStringPlatform"));
142 if (_to_java_string_fn == NULL) {
143 fatal("NewStringPlatform missing");
144 }
145 }
146
147 jstring js = NULL;
148 { JavaThread* thread = (JavaThread*)THREAD;
149 assert(thread->is_Java_thread(), "must be java thread");
150 ThreadToNativeFromVM ttn(thread);
151 HandleMark hm(thread);
152 js = (_to_java_string_fn)(thread->jni_environment(), str);
153 }
154 return Handle(THREAD, JNIHandles::resolve(js));
155 }
156
157 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) {
158 oop obj = java_string();
159 // Typical usage is to convert all '/' to '.' in string.
160 typeArrayOop value = java_lang_String::value(obj);
161 int offset = java_lang_String::offset(obj);
162 int length = java_lang_String::length(obj);
163
164 // First check if any from_char exist
165 int index; // Declared outside, used later
166 for (index = 0; index < length; index++) {
167 if (value->char_at(index + offset) == from_char) {
168 break;
169 }
170 }
171 if (index == length) {
172 // No from_char, so do not copy.
173 return java_string;
174 }
175
176 // Create new UNICODE buffer. Must handlize value because GC
177 // may happen during String and char array creation.
178 typeArrayHandle h_value(THREAD, value);
179 Handle string = basic_create(length, false, CHECK_NH);
180
181 typeArrayOop from_buffer = h_value();
182 typeArrayOop to_buffer = java_lang_String::value(string());
183
184 // Copy contents
185 for (index = 0; index < length; index++) {
186 jchar c = from_buffer->char_at(index + offset);
187 if (c == from_char) {
188 c = to_char;
189 }
190 to_buffer->char_at_put(index, c);
191 }
192 return string;
193 }
194
195 jchar* java_lang_String::as_unicode_string(oop java_string, int& length) {
196 typeArrayOop value = java_lang_String::value(java_string);
197 int offset = java_lang_String::offset(java_string);
198 length = java_lang_String::length(java_string);
199
200 jchar* result = NEW_RESOURCE_ARRAY(jchar, length);
201 for (int index = 0; index < length; index++) {
202 result[index] = value->char_at(index + offset);
203 }
204 return result;
205 }
206
207 symbolHandle java_lang_String::as_symbol(Handle java_string, TRAPS) {
208 oop obj = java_string();
209 typeArrayOop value = java_lang_String::value(obj);
210 int offset = java_lang_String::offset(obj);
211 int length = java_lang_String::length(obj);
212
213 ResourceMark rm(THREAD);
214 symbolHandle result;
215
216 if (length > 0) {
217 int utf8_length = UNICODE::utf8_length(value->char_at_addr(offset), length);
218 char* chars = NEW_RESOURCE_ARRAY(char, utf8_length + 1);
219 UNICODE::convert_to_utf8(value->char_at_addr(offset), length, chars);
220 // Allocate the symbol
221 result = oopFactory::new_symbol_handle(chars, utf8_length, CHECK_(symbolHandle()));
222 } else {
223 result = oopFactory::new_symbol_handle("", 0, CHECK_(symbolHandle()));
224 }
225 return result;
226 }
227
228 int java_lang_String::utf8_length(oop java_string) {
229 typeArrayOop value = java_lang_String::value(java_string);
230 int offset = java_lang_String::offset(java_string);
231 int length = java_lang_String::length(java_string);
232 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
233 return UNICODE::utf8_length(position, length);
234 }
235
236 char* java_lang_String::as_utf8_string(oop java_string) {
237 typeArrayOop value = java_lang_String::value(java_string);
238 int offset = java_lang_String::offset(java_string);
239 int length = java_lang_String::length(java_string);
240 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
241 return UNICODE::as_utf8(position, length);
242 }
243
244 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
245 typeArrayOop value = java_lang_String::value(java_string);
246 int offset = java_lang_String::offset(java_string);
247 int length = java_lang_String::length(java_string);
248 assert(start + len <= length, "just checking");
249 jchar* position = value->char_at_addr(offset + start);
250 return UNICODE::as_utf8(position, len);
251 }
252
253 bool java_lang_String::equals(oop java_string, jchar* chars, int len) {
254 assert(SharedSkipVerify ||
255 java_string->klass() == SystemDictionary::string_klass(),
256 "must be java_string");
257 typeArrayOop value = java_lang_String::value(java_string);
258 int offset = java_lang_String::offset(java_string);
259 int length = java_lang_String::length(java_string);
260 if (length != len) {
261 return false;
262 }
263 for (int i = 0; i < len; i++) {
264 if (value->char_at(i + offset) != chars[i]) {
265 return false;
266 }
267 }
268 return true;
269 }
270
271 void java_lang_String::print(Handle java_string, outputStream* st) {
272 oop obj = java_string();
273 assert(obj->klass() == SystemDictionary::string_klass(), "must be java_string");
274 typeArrayOop value = java_lang_String::value(obj);
275 int offset = java_lang_String::offset(obj);
276 int length = java_lang_String::length(obj);
277
278 int end = MIN2(length, 100);
279 if (value == NULL) {
280 // This can happen if, e.g., printing a String
281 // object before its initializer has been called
282 st->print_cr("NULL");
283 } else {
284 st->print("\"");
285 for (int index = 0; index < length; index++) {
286 st->print("%c", value->char_at(index + offset));
287 }
288 st->print("\"");
289 }
290 }
291
292
293 oop java_lang_Class::create_mirror(KlassHandle k, TRAPS) {
294 assert(k->java_mirror() == NULL, "should only assign mirror once");
295 // Use this moment of initialization to cache modifier_flags also,
296 // to support Class.getModifiers(). Instance classes recalculate
297 // the cached flags after the class file is parsed, but before the
298 // class is put into the system dictionary.
299 int computed_modifiers = k->compute_modifier_flags(CHECK_0);
300 k->set_modifier_flags(computed_modifiers);
301 if (SystemDictionary::class_klass_loaded()) {
302 // Allocate mirror (java.lang.Class instance)
303 Handle mirror = instanceKlass::cast(SystemDictionary::class_klass())->allocate_permanent_instance(CHECK_0);
304 // Setup indirections
305 mirror->obj_field_put(klass_offset, k());
306 k->set_java_mirror(mirror());
307 // It might also have a component mirror. This mirror must already exist.
308 if (k->oop_is_javaArray()) {
309 Handle comp_mirror;
310 if (k->oop_is_typeArray()) {
311 BasicType type = typeArrayKlass::cast(k->as_klassOop())->element_type();
312 comp_mirror = Universe::java_mirror(type);
313 assert(comp_mirror.not_null(), "must have primitive mirror");
314 } else if (k->oop_is_objArray()) {
315 klassOop element_klass = objArrayKlass::cast(k->as_klassOop())->element_klass();
316 if (element_klass != NULL
317 && (Klass::cast(element_klass)->oop_is_instance() ||
318 Klass::cast(element_klass)->oop_is_javaArray())) {
319 comp_mirror = Klass::cast(element_klass)->java_mirror();
320 assert(comp_mirror.not_null(), "must have element mirror");
321 }
322 // else some object array internal to the VM, like systemObjArrayKlassObj
323 }
324 if (comp_mirror.not_null()) {
325 // Two-way link between the array klass and its component mirror:
326 arrayKlass::cast(k->as_klassOop())->set_component_mirror(comp_mirror());
327 set_array_klass(comp_mirror(), k->as_klassOop());
328 }
329 }
330 return mirror();
331 } else {
332 return NULL;
333 }
334 }
335
336
337 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
338 // This should be improved by adding a field at the Java level or by
339 // introducing a new VM klass (see comment in ClassFileParser)
340 oop java_class = instanceKlass::cast(SystemDictionary::class_klass())->allocate_permanent_instance(CHECK_0);
341 if (type != T_VOID) {
342 klassOop aklass = Universe::typeArrayKlassObj(type);
343 assert(aklass != NULL, "correct bootstrap");
344 set_array_klass(java_class, aklass);
345 }
346 return java_class;
347 }
348
349
350 klassOop java_lang_Class::as_klassOop(oop java_class) {
351 //%note memory_2
352 klassOop k = klassOop(java_class->obj_field(klass_offset));
353 assert(k == NULL || k->is_klass(), "type check");
354 return k;
355 }
356
357
358 klassOop java_lang_Class::array_klass(oop java_class) {
359 klassOop k = klassOop(java_class->obj_field(array_klass_offset));
360 assert(k == NULL || k->is_klass() && Klass::cast(k)->oop_is_javaArray(), "should be array klass");
361 return k;
362 }
363
364
365 void java_lang_Class::set_array_klass(oop java_class, klassOop klass) {
366 assert(klass->is_klass() && Klass::cast(klass)->oop_is_javaArray(), "should be array klass");
367 java_class->obj_field_put(array_klass_offset, klass);
368 }
369
370
371 methodOop java_lang_Class::resolved_constructor(oop java_class) {
372 oop constructor = java_class->obj_field(resolved_constructor_offset);
373 assert(constructor == NULL || constructor->is_method(), "should be method");
374 return methodOop(constructor);
375 }
376
377
378 void java_lang_Class::set_resolved_constructor(oop java_class, methodOop constructor) {
379 assert(constructor->is_method(), "should be method");
380 java_class->obj_field_put(resolved_constructor_offset, constructor);
381 }
382
383
384 bool java_lang_Class::is_primitive(oop java_class) {
385 klassOop k = klassOop(java_class->obj_field(klass_offset));
386 return k == NULL;
387 }
388
389
390 BasicType java_lang_Class::primitive_type(oop java_class) {
391 assert(java_lang_Class::is_primitive(java_class), "just checking");
392 klassOop ak = klassOop(java_class->obj_field(array_klass_offset));
393 BasicType type = T_VOID;
394 if (ak != NULL) {
395 // Note: create_basic_type_mirror above initializes ak to a non-null value.
396 type = arrayKlass::cast(ak)->element_type();
397 } else {
398 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
399 }
400 assert(Universe::java_mirror(type) == java_class, "must be consistent");
401 return type;
402 }
403
404
405 oop java_lang_Class::primitive_mirror(BasicType t) {
406 oop mirror = Universe::java_mirror(t);
407 assert(mirror != NULL && mirror->is_a(SystemDictionary::class_klass()), "must be a Class");
408 assert(java_lang_Class::is_primitive(mirror), "must be primitive");
409 return mirror;
410 }
411
412 bool java_lang_Class::offsets_computed = false;
413 int java_lang_Class::classRedefinedCount_offset = -1;
414
415 void java_lang_Class::compute_offsets() {
416 assert(!offsets_computed, "offsets should be initialized only once");
417 offsets_computed = true;
418
419 klassOop k = SystemDictionary::class_klass();
420 // The classRedefinedCount field is only present starting in 1.5,
421 // so don't go fatal.
422 compute_optional_offset(classRedefinedCount_offset,
423 k, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature());
424 }
425
426 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
427 if (!JDK_Version::is_gte_jdk15x_version()
428 || classRedefinedCount_offset == -1) {
429 // The classRedefinedCount field is only present starting in 1.5.
430 // If we don't have an offset for it then just return -1 as a marker.
431 return -1;
432 }
433
434 return the_class_mirror->int_field(classRedefinedCount_offset);
435 }
436
437 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
438 if (!JDK_Version::is_gte_jdk15x_version()
439 || classRedefinedCount_offset == -1) {
440 // The classRedefinedCount field is only present starting in 1.5.
441 // If we don't have an offset for it then nothing to set.
442 return;
443 }
444
445 the_class_mirror->int_field_put(classRedefinedCount_offset, value);
446 }
447
448
449 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
450 // platform thread structure, and a eetop offset which was used for thread
451 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
452 // merged, so in the HotSpot VM we just use the eetop field for the thread
453 // instead of the privateInfo_offset.
454 //
455 // Note: The stackSize field is only present starting in 1.4.
456
457 int java_lang_Thread::_name_offset = 0;
458 int java_lang_Thread::_group_offset = 0;
459 int java_lang_Thread::_contextClassLoader_offset = 0;
460 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
461 int java_lang_Thread::_priority_offset = 0;
462 int java_lang_Thread::_eetop_offset = 0;
463 int java_lang_Thread::_daemon_offset = 0;
464 int java_lang_Thread::_stillborn_offset = 0;
465 int java_lang_Thread::_stackSize_offset = 0;
466 int java_lang_Thread::_tid_offset = 0;
467 int java_lang_Thread::_thread_status_offset = 0;
468 int java_lang_Thread::_park_blocker_offset = 0;
469 int java_lang_Thread::_park_event_offset = 0 ;
470
471
472 void java_lang_Thread::compute_offsets() {
473 assert(_group_offset == 0, "offsets should be initialized only once");
474
475 klassOop k = SystemDictionary::thread_klass();
476 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::char_array_signature());
477 compute_offset(_group_offset, k, vmSymbols::group_name(), vmSymbols::threadgroup_signature());
478 compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature());
479 compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature());
480 compute_offset(_priority_offset, k, vmSymbols::priority_name(), vmSymbols::int_signature());
481 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
482 compute_offset(_eetop_offset, k, vmSymbols::eetop_name(), vmSymbols::long_signature());
483 compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature());
484 // The stackSize field is only present starting in 1.4, so don't go fatal.
485 compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature());
486 // The tid and thread_status fields are only present starting in 1.5, so don't go fatal.
487 compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature());
488 compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature());
489 // The parkBlocker field is only present starting in 1.6, so don't go fatal.
490 compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature());
491 compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(),
492 vmSymbols::long_signature());
493 }
494
495
496 JavaThread* java_lang_Thread::thread(oop java_thread) {
497 return (JavaThread*) java_thread->obj_field(_eetop_offset);
498 }
499
500
501 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
502 // We are storing a JavaThread* (malloc'ed data) into a long field in the thread
503 // object. The store has to be 64-bit wide so we use a pointer store, but we
504 // cannot call oopDesc::obj_field_put since it includes a write barrier!
505 oop* addr = java_thread->obj_field_addr(_eetop_offset);
506 *addr = (oop) thread;
507 }
508
509
510 typeArrayOop java_lang_Thread::name(oop java_thread) {
511 oop name = java_thread->obj_field(_name_offset);
512 assert(name == NULL || (name->is_typeArray() && typeArrayKlass::cast(name->klass())->element_type() == T_CHAR), "just checking");
513 return typeArrayOop(name);
514 }
515
516
517 void java_lang_Thread::set_name(oop java_thread, typeArrayOop name) {
518 assert(java_thread->obj_field(_name_offset) == NULL, "name should be NULL");
519 java_thread->obj_field_put(_name_offset, name);
520 }
521
522
523 ThreadPriority java_lang_Thread::priority(oop java_thread) {
524 return (ThreadPriority)java_thread->int_field(_priority_offset);
525 }
526
527
528 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
529 java_thread->int_field_put(_priority_offset, priority);
530 }
531
532
533 oop java_lang_Thread::threadGroup(oop java_thread) {
534 return java_thread->obj_field(_group_offset);
535 }
536
537
538 bool java_lang_Thread::is_stillborn(oop java_thread) {
539 return java_thread->bool_field(_stillborn_offset) != 0;
540 }
541
542
543 // We never have reason to turn the stillborn bit off
544 void java_lang_Thread::set_stillborn(oop java_thread) {
545 java_thread->bool_field_put(_stillborn_offset, true);
546 }
547
548
549 bool java_lang_Thread::is_alive(oop java_thread) {
550 JavaThread* thr = java_lang_Thread::thread(java_thread);
551 return (thr != NULL);
552 }
553
554
555 bool java_lang_Thread::is_daemon(oop java_thread) {
556 return java_thread->bool_field(_daemon_offset) != 0;
557 }
558
559
560 void java_lang_Thread::set_daemon(oop java_thread) {
561 java_thread->bool_field_put(_daemon_offset, true);
562 }
563
564 oop java_lang_Thread::context_class_loader(oop java_thread) {
565 return java_thread->obj_field(_contextClassLoader_offset);
566 }
567
568 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
569 return java_thread->obj_field(_inheritedAccessControlContext_offset);
570 }
571
572
573 jlong java_lang_Thread::stackSize(oop java_thread) {
574 // The stackSize field is only present starting in 1.4
575 if (_stackSize_offset > 0) {
576 assert(JDK_Version::is_gte_jdk14x_version(), "sanity check");
577 return java_thread->long_field(_stackSize_offset);
578 } else {
579 return 0;
580 }
581 }
582
583 // Write the thread status value to threadStatus field in java.lang.Thread java class.
584 void java_lang_Thread::set_thread_status(oop java_thread,
585 java_lang_Thread::ThreadStatus status) {
586 assert(JavaThread::current()->thread_state() == _thread_in_vm, "Java Thread is not running in vm");
587 // The threadStatus is only present starting in 1.5
588 if (_thread_status_offset > 0) {
589 java_thread->int_field_put(_thread_status_offset, status);
590 }
591 }
592
593 // Read thread status value from threadStatus field in java.lang.Thread java class.
594 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
595 assert(Thread::current()->is_VM_thread() ||
596 JavaThread::current()->thread_state() == _thread_in_vm,
597 "Java Thread is not running in vm");
598 // The threadStatus is only present starting in 1.5
599 if (_thread_status_offset > 0) {
600 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
601 } else {
602 // All we can easily figure out is if it is alive, but that is
603 // enough info for a valid unknown status.
604 // These aren't restricted to valid set ThreadStatus values, so
605 // use JVMTI values and cast.
606 JavaThread* thr = java_lang_Thread::thread(java_thread);
607 if (thr == NULL) {
608 // the thread hasn't run yet or is in the process of exiting
609 return NEW;
610 }
611 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE;
612 }
613 }
614
615
616 jlong java_lang_Thread::thread_id(oop java_thread) {
617 // The thread ID field is only present starting in 1.5
618 if (_tid_offset > 0) {
619 return java_thread->long_field(_tid_offset);
620 } else {
621 return 0;
622 }
623 }
624
625 oop java_lang_Thread::park_blocker(oop java_thread) {
626 assert(JDK_Version::supports_thread_park_blocker() && _park_blocker_offset != 0,
627 "Must support parkBlocker field");
628
629 if (_park_blocker_offset > 0) {
630 return java_thread->obj_field(_park_blocker_offset);
631 }
632
633 return NULL;
634 }
635
636 jlong java_lang_Thread::park_event(oop java_thread) {
637 if (_park_event_offset > 0) {
638 return java_thread->long_field(_park_event_offset);
639 }
640 return 0;
641 }
642
643 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) {
644 if (_park_event_offset > 0) {
645 java_thread->long_field_put(_park_event_offset, ptr);
646 return true;
647 }
648 return false;
649 }
650
651
652 const char* java_lang_Thread::thread_status_name(oop java_thread) {
653 assert(JDK_Version::is_gte_jdk15x_version() && _thread_status_offset != 0, "Must have thread status");
654 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
655 switch (status) {
656 case NEW : return "NEW";
657 case RUNNABLE : return "RUNNABLE";
658 case SLEEPING : return "TIMED_WAITING (sleeping)";
659 case IN_OBJECT_WAIT : return "WAITING (on object monitor)";
660 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
661 case PARKED : return "WAITING (parking)";
662 case PARKED_TIMED : return "TIMED_WAITING (parking)";
663 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
664 case TERMINATED : return "TERMINATED";
665 default : return "UNKNOWN";
666 };
667 }
668 int java_lang_ThreadGroup::_parent_offset = 0;
669 int java_lang_ThreadGroup::_name_offset = 0;
670 int java_lang_ThreadGroup::_threads_offset = 0;
671 int java_lang_ThreadGroup::_groups_offset = 0;
672 int java_lang_ThreadGroup::_maxPriority_offset = 0;
673 int java_lang_ThreadGroup::_destroyed_offset = 0;
674 int java_lang_ThreadGroup::_daemon_offset = 0;
675 int java_lang_ThreadGroup::_vmAllowSuspension_offset = 0;
676 int java_lang_ThreadGroup::_nthreads_offset = 0;
677 int java_lang_ThreadGroup::_ngroups_offset = 0;
678
679 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
680 assert(java_thread_group->is_oop(), "thread group must be oop");
681 return java_thread_group->obj_field(_parent_offset);
682 }
683
684 // ("name as oop" accessor is not necessary)
685
686 typeArrayOop java_lang_ThreadGroup::name(oop java_thread_group) {
687 oop name = java_thread_group->obj_field(_name_offset);
688 // ThreadGroup.name can be null
689 return name == NULL ? (typeArrayOop)NULL : java_lang_String::value(name);
690 }
691
692 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
693 assert(java_thread_group->is_oop(), "thread group must be oop");
694 return java_thread_group->int_field(_nthreads_offset);
695 }
696
697 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
698 oop threads = java_thread_group->obj_field(_threads_offset);
699 assert(threads != NULL, "threadgroups should have threads");
700 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
701 return objArrayOop(threads);
702 }
703
704 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
705 assert(java_thread_group->is_oop(), "thread group must be oop");
706 return java_thread_group->int_field(_ngroups_offset);
707 }
708
709 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
710 oop groups = java_thread_group->obj_field(_groups_offset);
711 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
712 return objArrayOop(groups);
713 }
714
715 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
716 assert(java_thread_group->is_oop(), "thread group must be oop");
717 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
718 }
719
720 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
721 assert(java_thread_group->is_oop(), "thread group must be oop");
722 return java_thread_group->bool_field(_destroyed_offset) != 0;
723 }
724
725 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
726 assert(java_thread_group->is_oop(), "thread group must be oop");
727 return java_thread_group->bool_field(_daemon_offset) != 0;
728 }
729
730 bool java_lang_ThreadGroup::is_vmAllowSuspension(oop java_thread_group) {
731 assert(java_thread_group->is_oop(), "thread group must be oop");
732 return java_thread_group->bool_field(_vmAllowSuspension_offset) != 0;
733 }
734
735 void java_lang_ThreadGroup::compute_offsets() {
736 assert(_parent_offset == 0, "offsets should be initialized only once");
737
738 klassOop k = SystemDictionary::threadGroup_klass();
739
740 compute_offset(_parent_offset, k, vmSymbols::parent_name(), vmSymbols::threadgroup_signature());
741 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
742 compute_offset(_threads_offset, k, vmSymbols::threads_name(), vmSymbols::thread_array_signature());
743 compute_offset(_groups_offset, k, vmSymbols::groups_name(), vmSymbols::threadgroup_array_signature());
744 compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature());
745 compute_offset(_destroyed_offset, k, vmSymbols::destroyed_name(), vmSymbols::bool_signature());
746 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
747 compute_offset(_vmAllowSuspension_offset, k, vmSymbols::vmAllowSuspension_name(), vmSymbols::bool_signature());
748 compute_offset(_nthreads_offset, k, vmSymbols::nthreads_name(), vmSymbols::int_signature());
749 compute_offset(_ngroups_offset, k, vmSymbols::ngroups_name(), vmSymbols::int_signature());
750 }
751
752 oop java_lang_Throwable::backtrace(oop throwable) {
753 return throwable->obj_field_acquire(backtrace_offset);
754 }
755
756
757 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
758 throwable->release_obj_field_put(backtrace_offset, value);
759 }
760
761
762 oop java_lang_Throwable::message(oop throwable) {
763 return throwable->obj_field(detailMessage_offset);
764 }
765
766
767 oop java_lang_Throwable::message(Handle throwable) {
768 return throwable->obj_field(detailMessage_offset);
769 }
770
771
772 void java_lang_Throwable::set_message(oop throwable, oop value) {
773 throwable->obj_field_put(detailMessage_offset, value);
774 }
775
776
777 void java_lang_Throwable::clear_stacktrace(oop throwable) {
778 assert(JDK_Version::is_gte_jdk14x_version(), "should only be called in >= 1.4");
779 throwable->obj_field_put(stackTrace_offset, NULL);
780 }
781
782
783 void java_lang_Throwable::print(oop throwable, outputStream* st) {
784 ResourceMark rm;
785 klassOop k = throwable->klass();
786 assert(k != NULL, "just checking");
787 st->print("%s", instanceKlass::cast(k)->external_name());
788 oop msg = message(throwable);
789 if (msg != NULL) {
790 st->print(": %s", java_lang_String::as_utf8_string(msg));
791 }
792 }
793
794
795 void java_lang_Throwable::print(Handle throwable, outputStream* st) {
796 ResourceMark rm;
797 klassOop k = throwable->klass();
798 assert(k != NULL, "just checking");
799 st->print("%s", instanceKlass::cast(k)->external_name());
800 oop msg = message(throwable);
801 if (msg != NULL) {
802 st->print(": %s", java_lang_String::as_utf8_string(msg));
803 }
804 }
805
806 // Print stack trace element to resource allocated buffer
807 char* java_lang_Throwable::print_stack_element_to_buffer(methodOop method, int bci) {
808 // Get strings and string lengths
809 instanceKlass* klass = instanceKlass::cast(method->method_holder());
810 const char* klass_name = klass->external_name();
811 int buf_len = (int)strlen(klass_name);
812 char* source_file_name;
813 if (klass->source_file_name() == NULL) {
814 source_file_name = NULL;
815 } else {
816 source_file_name = klass->source_file_name()->as_C_string();
817 buf_len += (int)strlen(source_file_name);
818 }
819 char* method_name = method->name()->as_C_string();
820 buf_len += (int)strlen(method_name);
821
822 // Allocate temporary buffer with extra space for formatting and line number
823 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
824
825 // Print stack trace line in buffer
826 sprintf(buf, "\tat %s.%s", klass_name, method_name);
827 if (method->is_native()) {
828 strcat(buf, "(Native Method)");
829 } else {
830 int line_number = method->line_number_from_bci(bci);
831 if (source_file_name != NULL && (line_number != -1)) {
832 // Sourcename and linenumber
833 sprintf(buf + (int)strlen(buf), "(%s:%d)", source_file_name, line_number);
834 } else if (source_file_name != NULL) {
835 // Just sourcename
836 sprintf(buf + (int)strlen(buf), "(%s)", source_file_name);
837 } else {
838 // Neither soucename and linenumber
839 sprintf(buf + (int)strlen(buf), "(Unknown Source)");
840 }
841 nmethod* nm = method->code();
842 if (WizardMode && nm != NULL) {
843 sprintf(buf + (int)strlen(buf), "(nmethod %#x)", nm);
844 }
845 }
846
847 return buf;
848 }
849
850
851 void java_lang_Throwable::print_stack_element(Handle stream, methodOop method, int bci) {
852 ResourceMark rm;
853 char* buf = print_stack_element_to_buffer(method, bci);
854 print_to_stream(stream, buf);
855 }
856
857 void java_lang_Throwable::print_stack_element(outputStream *st, methodOop method, int bci) {
858 ResourceMark rm;
859 char* buf = print_stack_element_to_buffer(method, bci);
860 st->print_cr("%s", buf);
861 }
862
863 void java_lang_Throwable::print_to_stream(Handle stream, const char* str) {
864 if (stream.is_null()) {
865 tty->print_cr("%s", str);
866 } else {
867 EXCEPTION_MARK;
868 JavaValue result(T_VOID);
869 Handle arg (THREAD, oopFactory::new_charArray(str, THREAD));
870 if (!HAS_PENDING_EXCEPTION) {
871 JavaCalls::call_virtual(&result,
872 stream,
873 KlassHandle(THREAD, stream->klass()),
874 vmSymbolHandles::println_name(),
875 vmSymbolHandles::char_array_void_signature(),
876 arg,
877 THREAD);
878 }
879 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
880 if (HAS_PENDING_EXCEPTION) CLEAR_PENDING_EXCEPTION;
881 }
882
883 }
884
885
886 const char* java_lang_Throwable::no_stack_trace_message() {
887 return "\t<<no stack trace available>>";
888 }
889
890
891 // Currently used only for exceptions occurring during startup
892 void java_lang_Throwable::print_stack_trace(oop throwable, outputStream* st) {
893 Thread *THREAD = Thread::current();
894 Handle h_throwable(THREAD, throwable);
895 while (h_throwable.not_null()) {
896 objArrayHandle result (THREAD, objArrayOop(backtrace(h_throwable())));
897 if (result.is_null()) {
898 st->print_cr(no_stack_trace_message());
899 return;
900 }
901
902 while (result.not_null()) {
903 objArrayHandle methods (THREAD,
904 objArrayOop(result->obj_at(trace_methods_offset)));
905 typeArrayHandle bcis (THREAD,
906 typeArrayOop(result->obj_at(trace_bcis_offset)));
907
908 if (methods.is_null() || bcis.is_null()) {
909 st->print_cr(no_stack_trace_message());
910 return;
911 }
912
913 int length = methods()->length();
914 for (int index = 0; index < length; index++) {
915 methodOop method = methodOop(methods()->obj_at(index));
916 if (method == NULL) goto handle_cause;
917 int bci = bcis->ushort_at(index);
918 print_stack_element(st, method, bci);
919 }
920 result = objArrayHandle(THREAD, objArrayOop(result->obj_at(trace_next_offset)));
921 }
922 handle_cause:
923 {
924 EXCEPTION_MARK;
925 JavaValue result(T_OBJECT);
926 JavaCalls::call_virtual(&result,
927 h_throwable,
928 KlassHandle(THREAD, h_throwable->klass()),
929 vmSymbolHandles::getCause_name(),
930 vmSymbolHandles::void_throwable_signature(),
931 THREAD);
932 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
933 if (HAS_PENDING_EXCEPTION) {
934 CLEAR_PENDING_EXCEPTION;
935 h_throwable = Handle();
936 } else {
937 h_throwable = Handle(THREAD, (oop) result.get_jobject());
938 if (h_throwable.not_null()) {
939 st->print("Caused by: ");
940 print(h_throwable, st);
941 st->cr();
942 }
943 }
944 }
945 }
946 }
947
948
949 void java_lang_Throwable::print_stack_trace(oop throwable, oop print_stream) {
950 // Note: this is no longer used in Merlin, but we support it for compatibility.
951 Thread *thread = Thread::current();
952 Handle stream(thread, print_stream);
953 objArrayHandle result (thread, objArrayOop(backtrace(throwable)));
954 if (result.is_null()) {
955 print_to_stream(stream, no_stack_trace_message());
956 return;
957 }
958
959 while (result.not_null()) {
960 objArrayHandle methods (thread,
961 objArrayOop(result->obj_at(trace_methods_offset)));
962 typeArrayHandle bcis (thread,
963 typeArrayOop(result->obj_at(trace_bcis_offset)));
964
965 if (methods.is_null() || bcis.is_null()) {
966 print_to_stream(stream, no_stack_trace_message());
967 return;
968 }
969
970 int length = methods()->length();
971 for (int index = 0; index < length; index++) {
972 methodOop method = methodOop(methods()->obj_at(index));
973 if (method == NULL) return;
974 int bci = bcis->ushort_at(index);
975 print_stack_element(stream, method, bci);
976 }
977 result = objArrayHandle(thread, objArrayOop(result->obj_at(trace_next_offset)));
978 }
979 }
980
981 // This class provides a simple wrapper over the internal structure of
982 // exception backtrace to insulate users of the backtrace from needing
983 // to know what it looks like.
984 class BacktraceBuilder: public StackObj {
985 private:
986 Handle _backtrace;
987 objArrayOop _head;
988 objArrayOop _methods;
989 typeArrayOop _bcis;
990 int _index;
991 bool _dirty;
992 bool _done;
993 No_Safepoint_Verifier _nsv;
994
995 public:
996
997 enum {
998 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
999 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
1000 trace_next_offset = java_lang_Throwable::trace_next_offset,
1001 trace_size = java_lang_Throwable::trace_size,
1002 trace_chunk_size = java_lang_Throwable::trace_chunk_size
1003 };
1004
1005 // constructor for new backtrace
1006 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL) {
1007 expand(CHECK);
1008 _backtrace = _head;
1009 _index = 0;
1010 _dirty = false;
1011 _done = false;
1012 }
1013
1014 void flush() {
1015 if (_dirty && _methods != NULL) {
1016 BarrierSet* bs = Universe::heap()->barrier_set();
1017 assert(bs->has_write_ref_array_opt(), "Barrier set must have ref array opt");
1018 bs->write_ref_array(MemRegion((HeapWord*)_methods->obj_at_addr(0),
1019 _methods->length() * HeapWordsPerOop));
1020 _dirty = false;
1021 }
1022 }
1023
1024 void expand(TRAPS) {
1025 flush();
1026
1027 objArrayHandle old_head(THREAD, _head);
1028 Pause_No_Safepoint_Verifier pnsv(&_nsv);
1029
1030 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
1031 objArrayHandle new_head(THREAD, head);
1032
1033 objArrayOop methods = oopFactory::new_objectArray(trace_chunk_size, CHECK);
1034 objArrayHandle new_methods(THREAD, methods);
1035
1036 typeArrayOop bcis = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1037 typeArrayHandle new_bcis(THREAD, bcis);
1038
1039 if (!old_head.is_null()) {
1040 old_head->obj_at_put(trace_next_offset, new_head());
1041 }
1042 new_head->obj_at_put(trace_methods_offset, new_methods());
1043 new_head->obj_at_put(trace_bcis_offset, new_bcis());
1044
1045 _head = new_head();
1046 _methods = new_methods();
1047 _bcis = new_bcis();
1048 _index = 0;
1049 }
1050
1051 oop backtrace() {
1052 flush();
1053 return _backtrace();
1054 }
1055
1056 inline void push(methodOop method, short bci, TRAPS) {
1057 if (_index >= trace_chunk_size) {
1058 methodHandle mhandle(THREAD, method);
1059 expand(CHECK);
1060 method = mhandle();
1061 }
1062
1063 // _methods->obj_at_put(_index, method);
1064 *_methods->obj_at_addr(_index) = method;
1065 _bcis->ushort_at_put(_index, bci);
1066 _index++;
1067 _dirty = true;
1068 }
1069
1070 methodOop current_method() {
1071 assert(_index >= 0 && _index < trace_chunk_size, "out of range");
1072 return methodOop(_methods->obj_at(_index));
1073 }
1074
1075 jushort current_bci() {
1076 assert(_index >= 0 && _index < trace_chunk_size, "out of range");
1077 return _bcis->ushort_at(_index);
1078 }
1079 };
1080
1081
1082 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, TRAPS) {
1083 if (!StackTraceInThrowable) return;
1084 ResourceMark rm(THREAD);
1085
1086 // Start out by clearing the backtrace for this object, in case the VM
1087 // runs out of memory while allocating the stack trace
1088 set_backtrace(throwable(), NULL);
1089 if (JDK_Version::is_gte_jdk14x_version()) {
1090 // New since 1.4, clear lazily constructed Java level stacktrace if
1091 // refilling occurs
1092 clear_stacktrace(throwable());
1093 }
1094
1095 int max_depth = MaxJavaStackTraceDepth;
1096 JavaThread* thread = (JavaThread*)THREAD;
1097 BacktraceBuilder bt(CHECK);
1098
1099 // Instead of using vframe directly, this version of fill_in_stack_trace
1100 // basically handles everything by hand. This significantly improved the
1101 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
1102 // See bug 6333838 for more details.
1103 // The "ASSERT" here is to verify this method generates the exactly same stack
1104 // trace as utilizing vframe.
1105 #ifdef ASSERT
1106 vframeStream st(thread);
1107 methodHandle st_method(THREAD, st.method());
1108 #endif
1109 int total_count = 0;
1110 RegisterMap map(thread, false);
1111 int decode_offset = 0;
1112 nmethod* nm = NULL;
1113 bool skip_fillInStackTrace_check = false;
1114 bool skip_throwableInit_check = false;
1115
1116 for (frame fr = thread->last_frame(); max_depth != total_count;) {
1117 methodOop method = NULL;
1118 int bci = 0;
1119
1120 // Compiled java method case.
1121 if (decode_offset != 0) {
1122 DebugInfoReadStream stream(nm, decode_offset);
1123 decode_offset = stream.read_int();
1124 method = (methodOop)nm->oop_at(stream.read_int());
1125 bci = stream.read_bci();
1126 } else {
1127 if (fr.is_first_frame()) break;
1128 address pc = fr.pc();
1129 if (fr.is_interpreted_frame()) {
1130 intptr_t bcx = fr.interpreter_frame_bcx();
1131 method = fr.interpreter_frame_method();
1132 bci = fr.is_bci(bcx) ? bcx : method->bci_from((address)bcx);
1133 fr = fr.sender(&map);
1134 } else {
1135 CodeBlob* cb = fr.cb();
1136 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
1137 // but non nmethod
1138 fr = fr.sender(&map);
1139 if (cb == NULL || !cb->is_nmethod()) {
1140 continue;
1141 }
1142 nm = (nmethod*)cb;
1143 if (nm->method()->is_native()) {
1144 method = nm->method();
1145 bci = 0;
1146 } else {
1147 PcDesc* pd = nm->pc_desc_at(pc);
1148 decode_offset = pd->scope_decode_offset();
1149 // if decode_offset is not equal to 0, it will execute the
1150 // "compiled java method case" at the beginning of the loop.
1151 continue;
1152 }
1153 }
1154 }
1155 #ifdef ASSERT
1156 assert(st_method() == method && st.bci() == bci,
1157 "Wrong stack trace");
1158 st.next();
1159 // vframeStream::method isn't GC-safe so store off a copy
1160 // of the methodOop in case we GC.
1161 if (!st.at_end()) {
1162 st_method = st.method();
1163 }
1164 #endif
1165 if (!skip_fillInStackTrace_check) {
1166 // check "fillInStackTrace" only once, so we negate the flag
1167 // after the first time check.
1168 skip_fillInStackTrace_check = true;
1169 if (method->name() == vmSymbols::fillInStackTrace_name()) {
1170 continue;
1171 }
1172 }
1173 // skip <init> methods of the exceptions klass. If there is <init> methods
1174 // that belongs to a superclass of the exception we are going to skipping
1175 // them in stack trace. This is simlar to classic VM.
1176 if (!skip_throwableInit_check) {
1177 if (method->name() == vmSymbols::object_initializer_name() &&
1178 throwable->is_a(method->method_holder())) {
1179 continue;
1180 } else {
1181 // if no "Throwable.init()" method found, we stop checking it next time.
1182 skip_throwableInit_check = true;
1183 }
1184 }
1185 bt.push(method, bci, CHECK);
1186 total_count++;
1187 }
1188
1189 // Put completed stack trace into throwable object
1190 set_backtrace(throwable(), bt.backtrace());
1191 }
1192
1193 void java_lang_Throwable::fill_in_stack_trace(Handle throwable) {
1194 // No-op if stack trace is disabled
1195 if (!StackTraceInThrowable) {
1196 return;
1197 }
1198
1199 // Disable stack traces for some preallocated out of memory errors
1200 if (!Universe::should_fill_in_stack_trace(throwable)) {
1201 return;
1202 }
1203
1204 PRESERVE_EXCEPTION_MARK;
1205
1206 JavaThread* thread = JavaThread::active();
1207 fill_in_stack_trace(throwable, thread);
1208 // ignore exceptions thrown during stack trace filling
1209 CLEAR_PENDING_EXCEPTION;
1210 }
1211
1212 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
1213 // Allocate stack trace - backtrace is created but not filled in
1214
1215 // No-op if stack trace is disabled
1216 if (!StackTraceInThrowable) return;
1217
1218 objArrayOop h_oop = oopFactory::new_objectArray(trace_size, CHECK);
1219 objArrayHandle backtrace (THREAD, h_oop);
1220 objArrayOop m_oop = oopFactory::new_objectArray(trace_chunk_size, CHECK);
1221 objArrayHandle methods (THREAD, m_oop);
1222 typeArrayOop b = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1223 typeArrayHandle bcis(THREAD, b);
1224
1225 // backtrace has space for one chunk (next is NULL)
1226 backtrace->obj_at_put(trace_methods_offset, methods());
1227 backtrace->obj_at_put(trace_bcis_offset, bcis());
1228 set_backtrace(throwable(), backtrace());
1229 }
1230
1231
1232 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
1233 // Fill in stack trace into preallocated backtrace (no GC)
1234
1235 // No-op if stack trace is disabled
1236 if (!StackTraceInThrowable) return;
1237
1238 assert(throwable->is_a(SystemDictionary::throwable_klass()), "sanity check");
1239
1240 oop backtrace = java_lang_Throwable::backtrace(throwable());
1241 assert(backtrace != NULL, "backtrace not preallocated");
1242
1243 oop m = objArrayOop(backtrace)->obj_at(trace_methods_offset);
1244 objArrayOop methods = objArrayOop(m);
1245 assert(methods != NULL && methods->length() > 0, "method array not preallocated");
1246
1247 oop b = objArrayOop(backtrace)->obj_at(trace_bcis_offset);
1248 typeArrayOop bcis = typeArrayOop(b);
1249 assert(bcis != NULL, "bci array not preallocated");
1250
1251 assert(methods->length() == bcis->length(), "method and bci arrays should match");
1252
1253 JavaThread* thread = JavaThread::current();
1254 ResourceMark rm(thread);
1255 vframeStream st(thread);
1256
1257 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
1258 // methods as preallocated errors aren't created by "java" code.
1259
1260 // fill in as much stack trace as possible
1261 int max_chunks = MIN2(methods->length(), (int)MaxJavaStackTraceDepth);
1262 int chunk_count = 0;
1263
1264 for (;!st.at_end(); st.next()) {
1265 // add element
1266 bcis->ushort_at_put(chunk_count, st.bci());
1267 methods->obj_at_put(chunk_count, st.method());
1268
1269 chunk_count++;
1270
1271 // Bail-out for deep stacks
1272 if (chunk_count >= max_chunks) break;
1273 }
1274 }
1275
1276
1277 int java_lang_Throwable::get_stack_trace_depth(oop throwable, TRAPS) {
1278 if (throwable == NULL) {
1279 THROW_0(vmSymbols::java_lang_NullPointerException());
1280 }
1281 objArrayOop chunk = objArrayOop(backtrace(throwable));
1282 int depth = 0;
1283 if (chunk != NULL) {
1284 // Iterate over chunks and count full ones
1285 while (true) {
1286 objArrayOop next = objArrayOop(chunk->obj_at(trace_next_offset));
1287 if (next == NULL) break;
1288 depth += trace_chunk_size;
1289 chunk = next;
1290 }
1291 assert(chunk != NULL && chunk->obj_at(trace_next_offset) == NULL, "sanity check");
1292 // Count element in remaining partial chunk
1293 objArrayOop methods = objArrayOop(chunk->obj_at(trace_methods_offset));
1294 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1295 assert(methods != NULL && bcis != NULL, "sanity check");
1296 for (int i = 0; i < methods->length(); i++) {
1297 if (methods->obj_at(i) == NULL) break;
1298 depth++;
1299 }
1300 }
1301 return depth;
1302 }
1303
1304
1305 oop java_lang_Throwable::get_stack_trace_element(oop throwable, int index, TRAPS) {
1306 if (throwable == NULL) {
1307 THROW_0(vmSymbols::java_lang_NullPointerException());
1308 }
1309 if (index < 0) {
1310 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1311 }
1312 // Compute how many chunks to skip and index into actual chunk
1313 objArrayOop chunk = objArrayOop(backtrace(throwable));
1314 int skip_chunks = index / trace_chunk_size;
1315 int chunk_index = index % trace_chunk_size;
1316 while (chunk != NULL && skip_chunks > 0) {
1317 chunk = objArrayOop(chunk->obj_at(trace_next_offset));
1318 skip_chunks--;
1319 }
1320 if (chunk == NULL) {
1321 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1322 }
1323 // Get method,bci from chunk
1324 objArrayOop methods = objArrayOop(chunk->obj_at(trace_methods_offset));
1325 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1326 assert(methods != NULL && bcis != NULL, "sanity check");
1327 methodHandle method(THREAD, methodOop(methods->obj_at(chunk_index)));
1328 int bci = bcis->ushort_at(chunk_index);
1329 // Chunk can be partial full
1330 if (method.is_null()) {
1331 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1332 }
1333
1334 oop element = java_lang_StackTraceElement::create(method, bci, CHECK_0);
1335 return element;
1336 }
1337
1338 oop java_lang_StackTraceElement::create(methodHandle method, int bci, TRAPS) {
1339 // SystemDictionary::stackTraceElement_klass() will be null for pre-1.4 JDKs
1340 assert(JDK_Version::is_gte_jdk14x_version(), "should only be called in >= 1.4");
1341
1342 // Allocate java.lang.StackTraceElement instance
1343 klassOop k = SystemDictionary::stackTraceElement_klass();
1344 assert(k != NULL, "must be loaded in 1.4+");
1345 instanceKlassHandle ik (THREAD, k);
1346 if (ik->should_be_initialized()) {
1347 ik->initialize(CHECK_0);
1348 }
1349
1350 Handle element = ik->allocate_instance_handle(CHECK_0);
1351 // Fill in class name
1352 ResourceMark rm(THREAD);
1353 const char* str = instanceKlass::cast(method->method_holder())->external_name();
1354 oop classname = StringTable::intern((char*) str, CHECK_0);
1355 java_lang_StackTraceElement::set_declaringClass(element(), classname);
1356 // Fill in method name
1357 oop methodname = StringTable::intern(method->name(), CHECK_0);
1358 java_lang_StackTraceElement::set_methodName(element(), methodname);
1359 // Fill in source file name
1360 symbolOop source = instanceKlass::cast(method->method_holder())->source_file_name();
1361 oop filename = StringTable::intern(source, CHECK_0);
1362 java_lang_StackTraceElement::set_fileName(element(), filename);
1363 // File in source line number
1364 int line_number;
1365 if (method->is_native()) {
1366 // Negative value different from -1 below, enabling Java code in
1367 // class java.lang.StackTraceElement to distinguish "native" from
1368 // "no LineNumberTable".
1369 line_number = -2;
1370 } else {
1371 // Returns -1 if no LineNumberTable, and otherwise actual line number
1372 line_number = method->line_number_from_bci(bci);
1373 }
1374 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
1375
1376 return element();
1377 }
1378
1379
1380 void java_lang_reflect_AccessibleObject::compute_offsets() {
1381 klassOop k = SystemDictionary::reflect_accessible_object_klass();
1382 compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature());
1383 }
1384
1385 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
1386 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1387 return (jboolean) reflect->bool_field(override_offset);
1388 }
1389
1390 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
1391 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1392 reflect->bool_field_put(override_offset, (int) value);
1393 }
1394
1395 void java_lang_reflect_Method::compute_offsets() {
1396 klassOop k = SystemDictionary::reflect_method_klass();
1397 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
1398 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1399 compute_offset(returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature());
1400 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
1401 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
1402 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
1403 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
1404 // The generic signature and annotations fields are only present in 1.5
1405 signature_offset = -1;
1406 annotations_offset = -1;
1407 parameter_annotations_offset = -1;
1408 annotation_default_offset = -1;
1409 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
1410 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
1411 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
1412 compute_optional_offset(annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature());
1413 }
1414
1415 Handle java_lang_reflect_Method::create(TRAPS) {
1416 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1417 klassOop klass = SystemDictionary::reflect_method_klass();
1418 // This class is eagerly initialized during VM initialization, since we keep a refence
1419 // to one of the methods
1420 assert(instanceKlass::cast(klass)->is_initialized(), "must be initialized");
1421 return instanceKlass::cast(klass)->allocate_instance_handle(CHECK_NH);
1422 }
1423
1424 oop java_lang_reflect_Method::clazz(oop reflect) {
1425 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1426 return reflect->obj_field(clazz_offset);
1427 }
1428
1429 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
1430 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1431 reflect->obj_field_put(clazz_offset, value);
1432 }
1433
1434 int java_lang_reflect_Method::slot(oop reflect) {
1435 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1436 return reflect->int_field(slot_offset);
1437 }
1438
1439 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
1440 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1441 reflect->int_field_put(slot_offset, value);
1442 }
1443
1444 oop java_lang_reflect_Method::name(oop method) {
1445 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1446 return method->obj_field(name_offset);
1447 }
1448
1449 void java_lang_reflect_Method::set_name(oop method, oop value) {
1450 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1451 method->obj_field_put(name_offset, value);
1452 }
1453
1454 oop java_lang_reflect_Method::return_type(oop method) {
1455 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1456 return method->obj_field(returnType_offset);
1457 }
1458
1459 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
1460 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1461 method->obj_field_put(returnType_offset, value);
1462 }
1463
1464 oop java_lang_reflect_Method::parameter_types(oop method) {
1465 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1466 return method->obj_field(parameterTypes_offset);
1467 }
1468
1469 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
1470 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1471 method->obj_field_put(parameterTypes_offset, value);
1472 }
1473
1474 oop java_lang_reflect_Method::exception_types(oop method) {
1475 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1476 return method->obj_field(exceptionTypes_offset);
1477 }
1478
1479 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
1480 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1481 method->obj_field_put(exceptionTypes_offset, value);
1482 }
1483
1484 int java_lang_reflect_Method::modifiers(oop method) {
1485 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1486 return method->int_field(modifiers_offset);
1487 }
1488
1489 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
1490 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1491 method->int_field_put(modifiers_offset, value);
1492 }
1493
1494 bool java_lang_reflect_Method::has_signature_field() {
1495 return (signature_offset >= 0);
1496 }
1497
1498 oop java_lang_reflect_Method::signature(oop method) {
1499 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1500 assert(has_signature_field(), "signature field must be present");
1501 return method->obj_field(signature_offset);
1502 }
1503
1504 void java_lang_reflect_Method::set_signature(oop method, oop value) {
1505 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1506 assert(has_signature_field(), "signature field must be present");
1507 method->obj_field_put(signature_offset, value);
1508 }
1509
1510 bool java_lang_reflect_Method::has_annotations_field() {
1511 return (annotations_offset >= 0);
1512 }
1513
1514 oop java_lang_reflect_Method::annotations(oop method) {
1515 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1516 assert(has_annotations_field(), "annotations field must be present");
1517 return method->obj_field(annotations_offset);
1518 }
1519
1520 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
1521 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1522 assert(has_annotations_field(), "annotations field must be present");
1523 method->obj_field_put(annotations_offset, value);
1524 }
1525
1526 bool java_lang_reflect_Method::has_parameter_annotations_field() {
1527 return (parameter_annotations_offset >= 0);
1528 }
1529
1530 oop java_lang_reflect_Method::parameter_annotations(oop method) {
1531 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1532 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
1533 return method->obj_field(parameter_annotations_offset);
1534 }
1535
1536 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
1537 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1538 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
1539 method->obj_field_put(parameter_annotations_offset, value);
1540 }
1541
1542 bool java_lang_reflect_Method::has_annotation_default_field() {
1543 return (annotation_default_offset >= 0);
1544 }
1545
1546 oop java_lang_reflect_Method::annotation_default(oop method) {
1547 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1548 assert(has_annotation_default_field(), "annotation default field must be present");
1549 return method->obj_field(annotation_default_offset);
1550 }
1551
1552 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
1553 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1554 assert(has_annotation_default_field(), "annotation default field must be present");
1555 method->obj_field_put(annotation_default_offset, value);
1556 }
1557
1558 void java_lang_reflect_Constructor::compute_offsets() {
1559 klassOop k = SystemDictionary::reflect_constructor_klass();
1560 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
1561 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
1562 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
1563 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
1564 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
1565 // The generic signature and annotations fields are only present in 1.5
1566 signature_offset = -1;
1567 annotations_offset = -1;
1568 parameter_annotations_offset = -1;
1569 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
1570 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
1571 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
1572 }
1573
1574 Handle java_lang_reflect_Constructor::create(TRAPS) {
1575 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1576 symbolHandle name = vmSymbolHandles::java_lang_reflect_Constructor();
1577 klassOop k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
1578 instanceKlassHandle klass (THREAD, k);
1579 // Ensure it is initialized
1580 klass->initialize(CHECK_NH);
1581 return klass->allocate_instance_handle(CHECK_NH);
1582 }
1583
1584 oop java_lang_reflect_Constructor::clazz(oop reflect) {
1585 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1586 return reflect->obj_field(clazz_offset);
1587 }
1588
1589 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
1590 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1591 reflect->obj_field_put(clazz_offset, value);
1592 }
1593
1594 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
1595 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1596 return constructor->obj_field(parameterTypes_offset);
1597 }
1598
1599 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
1600 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1601 constructor->obj_field_put(parameterTypes_offset, value);
1602 }
1603
1604 oop java_lang_reflect_Constructor::exception_types(oop constructor) {
1605 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1606 return constructor->obj_field(exceptionTypes_offset);
1607 }
1608
1609 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
1610 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1611 constructor->obj_field_put(exceptionTypes_offset, value);
1612 }
1613
1614 int java_lang_reflect_Constructor::slot(oop reflect) {
1615 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1616 return reflect->int_field(slot_offset);
1617 }
1618
1619 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
1620 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1621 reflect->int_field_put(slot_offset, value);
1622 }
1623
1624 int java_lang_reflect_Constructor::modifiers(oop constructor) {
1625 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1626 return constructor->int_field(modifiers_offset);
1627 }
1628
1629 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
1630 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1631 constructor->int_field_put(modifiers_offset, value);
1632 }
1633
1634 bool java_lang_reflect_Constructor::has_signature_field() {
1635 return (signature_offset >= 0);
1636 }
1637
1638 oop java_lang_reflect_Constructor::signature(oop constructor) {
1639 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1640 assert(has_signature_field(), "signature field must be present");
1641 return constructor->obj_field(signature_offset);
1642 }
1643
1644 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
1645 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1646 assert(has_signature_field(), "signature field must be present");
1647 constructor->obj_field_put(signature_offset, value);
1648 }
1649
1650 bool java_lang_reflect_Constructor::has_annotations_field() {
1651 return (annotations_offset >= 0);
1652 }
1653
1654 oop java_lang_reflect_Constructor::annotations(oop constructor) {
1655 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1656 assert(has_annotations_field(), "annotations field must be present");
1657 return constructor->obj_field(annotations_offset);
1658 }
1659
1660 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
1661 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1662 assert(has_annotations_field(), "annotations field must be present");
1663 constructor->obj_field_put(annotations_offset, value);
1664 }
1665
1666 bool java_lang_reflect_Constructor::has_parameter_annotations_field() {
1667 return (parameter_annotations_offset >= 0);
1668 }
1669
1670 oop java_lang_reflect_Constructor::parameter_annotations(oop method) {
1671 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1672 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
1673 return method->obj_field(parameter_annotations_offset);
1674 }
1675
1676 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
1677 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1678 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
1679 method->obj_field_put(parameter_annotations_offset, value);
1680 }
1681
1682 void java_lang_reflect_Field::compute_offsets() {
1683 klassOop k = SystemDictionary::reflect_field_klass();
1684 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
1685 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1686 compute_offset(type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature());
1687 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
1688 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
1689 // The generic signature and annotations fields are only present in 1.5
1690 signature_offset = -1;
1691 annotations_offset = -1;
1692 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
1693 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
1694 }
1695
1696 Handle java_lang_reflect_Field::create(TRAPS) {
1697 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1698 symbolHandle name = vmSymbolHandles::java_lang_reflect_Field();
1699 klassOop k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
1700 instanceKlassHandle klass (THREAD, k);
1701 // Ensure it is initialized
1702 klass->initialize(CHECK_NH);
1703 return klass->allocate_instance_handle(CHECK_NH);
1704 }
1705
1706 oop java_lang_reflect_Field::clazz(oop reflect) {
1707 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1708 return reflect->obj_field(clazz_offset);
1709 }
1710
1711 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
1712 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1713 reflect->obj_field_put(clazz_offset, value);
1714 }
1715
1716 oop java_lang_reflect_Field::name(oop field) {
1717 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1718 return field->obj_field(name_offset);
1719 }
1720
1721 void java_lang_reflect_Field::set_name(oop field, oop value) {
1722 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1723 field->obj_field_put(name_offset, value);
1724 }
1725
1726 oop java_lang_reflect_Field::type(oop field) {
1727 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1728 return field->obj_field(type_offset);
1729 }
1730
1731 void java_lang_reflect_Field::set_type(oop field, oop value) {
1732 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1733 field->obj_field_put(type_offset, value);
1734 }
1735
1736 int java_lang_reflect_Field::slot(oop reflect) {
1737 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1738 return reflect->int_field(slot_offset);
1739 }
1740
1741 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
1742 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1743 reflect->int_field_put(slot_offset, value);
1744 }
1745
1746 int java_lang_reflect_Field::modifiers(oop field) {
1747 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1748 return field->int_field(modifiers_offset);
1749 }
1750
1751 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
1752 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1753 field->int_field_put(modifiers_offset, value);
1754 }
1755
1756 bool java_lang_reflect_Field::has_signature_field() {
1757 return (signature_offset >= 0);
1758 }
1759
1760 oop java_lang_reflect_Field::signature(oop field) {
1761 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1762 assert(has_signature_field(), "signature field must be present");
1763 return field->obj_field(signature_offset);
1764 }
1765
1766 void java_lang_reflect_Field::set_signature(oop field, oop value) {
1767 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1768 assert(has_signature_field(), "signature field must be present");
1769 field->obj_field_put(signature_offset, value);
1770 }
1771
1772 bool java_lang_reflect_Field::has_annotations_field() {
1773 return (annotations_offset >= 0);
1774 }
1775
1776 oop java_lang_reflect_Field::annotations(oop field) {
1777 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1778 assert(has_annotations_field(), "annotations field must be present");
1779 return field->obj_field(annotations_offset);
1780 }
1781
1782 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
1783 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1784 assert(has_annotations_field(), "annotations field must be present");
1785 field->obj_field_put(annotations_offset, value);
1786 }
1787
1788
1789 void sun_reflect_ConstantPool::compute_offsets() {
1790 klassOop k = SystemDictionary::reflect_constant_pool_klass();
1791 // This null test can be removed post beta
1792 if (k != NULL) {
1793 compute_offset(_cp_oop_offset, k, vmSymbols::constantPoolOop_name(), vmSymbols::object_signature());
1794 }
1795 }
1796
1797
1798 Handle sun_reflect_ConstantPool::create(TRAPS) {
1799 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1800 klassOop k = SystemDictionary::reflect_constant_pool_klass();
1801 instanceKlassHandle klass (THREAD, k);
1802 // Ensure it is initialized
1803 klass->initialize(CHECK_NH);
1804 return klass->allocate_instance_handle(CHECK_NH);
1805 }
1806
1807
1808 oop sun_reflect_ConstantPool::cp_oop(oop reflect) {
1809 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1810 return reflect->obj_field(_cp_oop_offset);
1811 }
1812
1813
1814 void sun_reflect_ConstantPool::set_cp_oop(oop reflect, oop value) {
1815 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1816 reflect->obj_field_put(_cp_oop_offset, value);
1817 }
1818
1819 void sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
1820 klassOop k = SystemDictionary::reflect_unsafe_static_field_accessor_impl_klass();
1821 // This null test can be removed post beta
1822 if (k != NULL) {
1823 compute_offset(_base_offset, k,
1824 vmSymbols::base_name(), vmSymbols::object_signature());
1825 }
1826 }
1827
1828 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
1829 klassOop k = SystemDictionary::box_klass(type);
1830 if (k == NULL) return NULL;
1831 instanceKlassHandle h (THREAD, k);
1832 if (!h->is_initialized()) h->initialize(CHECK_0);
1833 return h->allocate_instance(THREAD);
1834 }
1835
1836
1837 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
1838 oop box = initialize_and_allocate(type, CHECK_0);
1839 if (box == NULL) return NULL;
1840 switch (type) {
1841 case T_BOOLEAN:
1842 box->bool_field_put(value_offset, value->z);
1843 break;
1844 case T_CHAR:
1845 box->char_field_put(value_offset, value->c);
1846 break;
1847 case T_FLOAT:
1848 box->float_field_put(value_offset, value->f);
1849 break;
1850 case T_DOUBLE:
1851 box->double_field_put(value_offset, value->d);
1852 break;
1853 case T_BYTE:
1854 box->byte_field_put(value_offset, value->b);
1855 break;
1856 case T_SHORT:
1857 box->short_field_put(value_offset, value->s);
1858 break;
1859 case T_INT:
1860 box->int_field_put(value_offset, value->i);
1861 break;
1862 case T_LONG:
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::basic_type(oop box) {
1873 if (box == NULL) return T_ILLEGAL;
1874 BasicType type = SystemDictionary::box_klass_type(box->klass());
1875 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
1876 return T_ILLEGAL;
1877 return type;
1878 }
1879
1880
1881 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
1882 BasicType type = SystemDictionary::box_klass_type(box->klass());
1883 switch (type) {
1884 case T_BOOLEAN:
1885 value->z = box->bool_field(value_offset);
1886 break;
1887 case T_CHAR:
1888 value->c = box->char_field(value_offset);
1889 break;
1890 case T_FLOAT:
1891 value->f = box->float_field(value_offset);
1892 break;
1893 case T_DOUBLE:
1894 value->d = box->double_field(value_offset);
1895 break;
1896 case T_BYTE:
1897 value->b = box->byte_field(value_offset);
1898 break;
1899 case T_SHORT:
1900 value->s = box->short_field(value_offset);
1901 break;
1902 case T_INT:
1903 value->i = box->int_field(value_offset);
1904 break;
1905 case T_LONG:
1906 value->j = box->long_field(value_offset);
1907 break;
1908 default:
1909 return T_ILLEGAL;
1910 } // end switch
1911 return type;
1912 }
1913
1914
1915 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
1916 BasicType type = SystemDictionary::box_klass_type(box->klass());
1917 switch (type) {
1918 case T_BOOLEAN:
1919 box->bool_field_put(value_offset, value->z);
1920 break;
1921 case T_CHAR:
1922 box->char_field_put(value_offset, value->c);
1923 break;
1924 case T_FLOAT:
1925 box->float_field_put(value_offset, value->f);
1926 break;
1927 case T_DOUBLE:
1928 box->double_field_put(value_offset, value->d);
1929 break;
1930 case T_BYTE:
1931 box->byte_field_put(value_offset, value->b);
1932 break;
1933 case T_SHORT:
1934 box->short_field_put(value_offset, value->s);
1935 break;
1936 case T_INT:
1937 box->int_field_put(value_offset, value->i);
1938 break;
1939 case T_LONG:
1940 box->long_field_put(value_offset, value->j);
1941 break;
1942 default:
1943 return T_ILLEGAL;
1944 } // end switch
1945 return type;
1946 }
1947
1948
1949 // Support for java_lang_ref_Reference
1950
1951 void java_lang_ref_Reference::set_referent(oop ref, oop value) {
1952 ref->obj_field_put(referent_offset, value);
1953 }
1954
1955 oop* java_lang_ref_Reference::referent_addr(oop ref) {
1956 return ref->obj_field_addr(referent_offset);
1957 }
1958
1959 void java_lang_ref_Reference::set_next(oop ref, oop value) {
1960 ref->obj_field_put(next_offset, value);
1961 }
1962
1963 oop* java_lang_ref_Reference::next_addr(oop ref) {
1964 return ref->obj_field_addr(next_offset);
1965 }
1966
1967 void java_lang_ref_Reference::set_discovered(oop ref, oop value) {
1968 ref->obj_field_put(discovered_offset, value);
1969 }
1970
1971 oop* java_lang_ref_Reference::discovered_addr(oop ref) {
1972 return ref->obj_field_addr(discovered_offset);
1973 }
1974
1975 oop* java_lang_ref_Reference::pending_list_lock_addr() {
1976 instanceKlass* ik = instanceKlass::cast(SystemDictionary::reference_klass());
1977 return (oop*)(((char *)ik->start_of_static_fields()) + static_lock_offset);
1978 }
1979
1980 oop* java_lang_ref_Reference::pending_list_addr() {
1981 instanceKlass* ik = instanceKlass::cast(SystemDictionary::reference_klass());
1982 return (oop *)(((char *)ik->start_of_static_fields()) + static_pending_offset);
1983 }
1984
1985
1986 // Support for java_lang_ref_SoftReference
1987
1988 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
1989 return ref->long_field(timestamp_offset);
1990 }
1991
1992 jlong java_lang_ref_SoftReference::clock() {
1993 instanceKlass* ik = instanceKlass::cast(SystemDictionary::soft_reference_klass());
1994 int offset = ik->offset_of_static_fields() + static_clock_offset;
1995
1996 return SystemDictionary::soft_reference_klass()->long_field(offset);
1997 }
1998
1999 void java_lang_ref_SoftReference::set_clock(jlong value) {
2000 instanceKlass* ik = instanceKlass::cast(SystemDictionary::soft_reference_klass());
2001 int offset = ik->offset_of_static_fields() + static_clock_offset;
2002
2003 SystemDictionary::soft_reference_klass()->long_field_put(offset, value);
2004 }
2005
2006
2007 // Support for java_security_AccessControlContext
2008
2009 int java_security_AccessControlContext::_context_offset = 0;
2010 int java_security_AccessControlContext::_privilegedContext_offset = 0;
2011 int java_security_AccessControlContext::_isPrivileged_offset = 0;
2012
2013
2014 void java_security_AccessControlContext::compute_offsets() {
2015 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
2016 fieldDescriptor fd;
2017 instanceKlass* ik = instanceKlass::cast(SystemDictionary::AccessControlContext_klass());
2018
2019 if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) {
2020 fatal("Invalid layout of java.security.AccessControlContext");
2021 }
2022 _context_offset = fd.offset();
2023
2024 if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) {
2025 fatal("Invalid layout of java.security.AccessControlContext");
2026 }
2027 _privilegedContext_offset = fd.offset();
2028
2029 if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) {
2030 fatal("Invalid layout of java.security.AccessControlContext");
2031 }
2032 _isPrivileged_offset = fd.offset();
2033 }
2034
2035
2036 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
2037 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
2038 // Ensure klass is initialized
2039 instanceKlass::cast(SystemDictionary::AccessControlContext_klass())->initialize(CHECK_0);
2040 // Allocate result
2041 oop result = instanceKlass::cast(SystemDictionary::AccessControlContext_klass())->allocate_instance(CHECK_0);
2042 // Fill in values
2043 result->obj_field_put(_context_offset, context());
2044 result->obj_field_put(_privilegedContext_offset, privileged_context());
2045 result->bool_field_put(_isPrivileged_offset, isPrivileged);
2046 return result;
2047 }
2048
2049
2050 // Support for java_lang_ClassLoader
2051
2052 oop java_lang_ClassLoader::parent(oop loader) {
2053 assert(loader->is_oop(), "loader must be oop");
2054 return loader->obj_field(parent_offset);
2055 }
2056
2057
2058 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
2059 // Fix for 4474172; see evaluation for more details
2060 loader = non_reflection_class_loader(loader);
2061
2062 oop cl = SystemDictionary::java_system_loader();
2063 while(cl != NULL) {
2064 if (cl == loader) return true;
2065 cl = parent(cl);
2066 }
2067 return false;
2068 }
2069
2070 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
2071 if (loader != NULL) {
2072 // See whether this is one of the class loaders associated with
2073 // the generated bytecodes for reflection, and if so, "magically"
2074 // delegate to its parent to prevent class loading from occurring
2075 // in places where applications using reflection didn't expect it.
2076 klassOop delegating_cl_class = SystemDictionary::reflect_delegating_classloader_klass();
2077 // This might be null in non-1.4 JDKs
2078 if (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)) {
2079 return parent(loader);
2080 }
2081 }
2082 return loader;
2083 }
2084
2085
2086 // Support for java_lang_System
2087
2088 void java_lang_System::compute_offsets() {
2089 assert(offset_of_static_fields == 0, "offsets should be initialized only once");
2090
2091 instanceKlass* ik = instanceKlass::cast(SystemDictionary::system_klass());
2092 offset_of_static_fields = ik->offset_of_static_fields();
2093 }
2094
2095 int java_lang_System::in_offset_in_bytes() {
2096 return (offset_of_static_fields + static_in_offset);
2097 }
2098
2099
2100 int java_lang_System::out_offset_in_bytes() {
2101 return (offset_of_static_fields + static_out_offset);
2102 }
2103
2104
2105 int java_lang_System::err_offset_in_bytes() {
2106 return (offset_of_static_fields + static_err_offset);
2107 }
2108
2109
2110
2111 int java_lang_String::value_offset;
2112 int java_lang_String::offset_offset;
2113 int java_lang_String::count_offset;
2114 int java_lang_String::hash_offset;
2115 int java_lang_Class::klass_offset;
2116 int java_lang_Class::array_klass_offset;
2117 int java_lang_Class::resolved_constructor_offset;
2118 int java_lang_Class::number_of_fake_oop_fields;
2119 int java_lang_Throwable::backtrace_offset;
2120 int java_lang_Throwable::detailMessage_offset;
2121 int java_lang_Throwable::cause_offset;
2122 int java_lang_Throwable::stackTrace_offset;
2123 int java_lang_reflect_AccessibleObject::override_offset;
2124 int java_lang_reflect_Method::clazz_offset;
2125 int java_lang_reflect_Method::name_offset;
2126 int java_lang_reflect_Method::returnType_offset;
2127 int java_lang_reflect_Method::parameterTypes_offset;
2128 int java_lang_reflect_Method::exceptionTypes_offset;
2129 int java_lang_reflect_Method::slot_offset;
2130 int java_lang_reflect_Method::modifiers_offset;
2131 int java_lang_reflect_Method::signature_offset;
2132 int java_lang_reflect_Method::annotations_offset;
2133 int java_lang_reflect_Method::parameter_annotations_offset;
2134 int java_lang_reflect_Method::annotation_default_offset;
2135 int java_lang_reflect_Constructor::clazz_offset;
2136 int java_lang_reflect_Constructor::parameterTypes_offset;
2137 int java_lang_reflect_Constructor::exceptionTypes_offset;
2138 int java_lang_reflect_Constructor::slot_offset;
2139 int java_lang_reflect_Constructor::modifiers_offset;
2140 int java_lang_reflect_Constructor::signature_offset;
2141 int java_lang_reflect_Constructor::annotations_offset;
2142 int java_lang_reflect_Constructor::parameter_annotations_offset;
2143 int java_lang_reflect_Field::clazz_offset;
2144 int java_lang_reflect_Field::name_offset;
2145 int java_lang_reflect_Field::type_offset;
2146 int java_lang_reflect_Field::slot_offset;
2147 int java_lang_reflect_Field::modifiers_offset;
2148 int java_lang_reflect_Field::signature_offset;
2149 int java_lang_reflect_Field::annotations_offset;
2150 int java_lang_boxing_object::value_offset;
2151 int java_lang_ref_Reference::referent_offset;
2152 int java_lang_ref_Reference::queue_offset;
2153 int java_lang_ref_Reference::next_offset;
2154 int java_lang_ref_Reference::discovered_offset;
2155 int java_lang_ref_Reference::static_lock_offset;
2156 int java_lang_ref_Reference::static_pending_offset;
2157 int java_lang_ref_Reference::number_of_fake_oop_fields;
2158 int java_lang_ref_SoftReference::timestamp_offset;
2159 int java_lang_ref_SoftReference::static_clock_offset;
2160 int java_lang_ClassLoader::parent_offset;
2161 int java_lang_System::offset_of_static_fields;
2162 int java_lang_System::static_in_offset;
2163 int java_lang_System::static_out_offset;
2164 int java_lang_System::static_err_offset;
2165 int java_lang_StackTraceElement::declaringClass_offset;
2166 int java_lang_StackTraceElement::methodName_offset;
2167 int java_lang_StackTraceElement::fileName_offset;
2168 int java_lang_StackTraceElement::lineNumber_offset;
2169 int java_lang_AssertionStatusDirectives::classes_offset;
2170 int java_lang_AssertionStatusDirectives::classEnabled_offset;
2171 int java_lang_AssertionStatusDirectives::packages_offset;
2172 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
2173 int java_lang_AssertionStatusDirectives::deflt_offset;
2174 int java_nio_Buffer::_limit_offset;
2175 int sun_misc_AtomicLongCSImpl::_value_offset;
2176 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0;
2177 int sun_reflect_ConstantPool::_cp_oop_offset;
2178 int sun_reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
2179
2180
2181 // Support for java_lang_StackTraceElement
2182
2183 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
2184 element->obj_field_put(fileName_offset, value);
2185 }
2186
2187 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
2188 element->obj_field_put(declaringClass_offset, value);
2189 }
2190
2191 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
2192 element->obj_field_put(methodName_offset, value);
2193 }
2194
2195 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
2196 element->int_field_put(lineNumber_offset, value);
2197 }
2198
2199
2200 // Support for java Assertions - java_lang_AssertionStatusDirectives.
2201
2202 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
2203 o->obj_field_put(classes_offset, val);
2204 }
2205
2206 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
2207 o->obj_field_put(classEnabled_offset, val);
2208 }
2209
2210 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
2211 o->obj_field_put(packages_offset, val);
2212 }
2213
2214 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
2215 o->obj_field_put(packageEnabled_offset, val);
2216 }
2217
2218 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
2219 o->bool_field_put(deflt_offset, val);
2220 }
2221
2222
2223 // Support for intrinsification of java.nio.Buffer.checkIndex
2224 int java_nio_Buffer::limit_offset() {
2225 return _limit_offset;
2226 }
2227
2228
2229 void java_nio_Buffer::compute_offsets() {
2230 klassOop k = SystemDictionary::java_nio_Buffer_klass();
2231 assert(k != NULL, "must be loaded in 1.4+");
2232 compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature());
2233 }
2234
2235 // Support for intrinsification of sun.misc.AtomicLongCSImpl.attemptUpdate
2236 int sun_misc_AtomicLongCSImpl::value_offset() {
2237 assert(SystemDictionary::sun_misc_AtomicLongCSImpl_klass() != NULL, "can't call this");
2238 return _value_offset;
2239 }
2240
2241
2242 void sun_misc_AtomicLongCSImpl::compute_offsets() {
2243 klassOop k = SystemDictionary::sun_misc_AtomicLongCSImpl_klass();
2244 // If this class is not present, its value field offset won't be referenced.
2245 if (k != NULL) {
2246 compute_offset(_value_offset, k, vmSymbols::value_name(), vmSymbols::long_signature());
2247 }
2248 }
2249
2250 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) {
2251 if (_owner_offset != 0) return;
2252
2253 assert(JDK_Version::is_gte_jdk16x_version(), "Must be JDK 1.6 or later");
2254 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK);
2255 klassOop k = SystemDictionary::abstract_ownable_synchronizer_klass();
2256 compute_offset(_owner_offset, k,
2257 vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature());
2258 }
2259
2260 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
2261 assert(_owner_offset != 0, "Must be initialized");
2262 return obj->obj_field(_owner_offset);
2263 }
2264
2265 // Compute hard-coded offsets
2266 // Invoked before SystemDictionary::initialize, so pre-loaded classes
2267 // are not available to determine the offset_of_static_fields.
2268 void JavaClasses::compute_hard_coded_offsets() {
2269 const int x = wordSize;
2270 const int header = instanceOopDesc::header_size_in_bytes();
2271
2272 // Do the String Class
2273 java_lang_String::value_offset = java_lang_String::hc_value_offset * x + header;
2274 java_lang_String::offset_offset = java_lang_String::hc_offset_offset * x + header;
2275 java_lang_String::count_offset = java_lang_String::offset_offset + sizeof (jint);
2276 java_lang_String::hash_offset = java_lang_String::count_offset + sizeof (jint);
2277
2278 // Do the Class Class
2279 java_lang_Class::klass_offset = java_lang_Class::hc_klass_offset * x + header;
2280 java_lang_Class::array_klass_offset = java_lang_Class::hc_array_klass_offset * x + header;
2281 java_lang_Class::resolved_constructor_offset = java_lang_Class::hc_resolved_constructor_offset * x + header;
2282
2283 // This is NOT an offset
2284 java_lang_Class::number_of_fake_oop_fields = java_lang_Class::hc_number_of_fake_oop_fields;
2285
2286 // Throwable Class
2287 java_lang_Throwable::backtrace_offset = java_lang_Throwable::hc_backtrace_offset * x + header;
2288 java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header;
2289 java_lang_Throwable::cause_offset = java_lang_Throwable::hc_cause_offset * x + header;
2290 java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header;
2291
2292 // java_lang_boxing_object
2293 java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset * x + header;
2294
2295 // java_lang_ref_Reference:
2296 java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header;
2297 java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header;
2298 java_lang_ref_Reference::next_offset = java_lang_ref_Reference::hc_next_offset * x + header;
2299 java_lang_ref_Reference::discovered_offset = java_lang_ref_Reference::hc_discovered_offset * x + header;
2300 java_lang_ref_Reference::static_lock_offset = java_lang_ref_Reference::hc_static_lock_offset * x;
2301 java_lang_ref_Reference::static_pending_offset = java_lang_ref_Reference::hc_static_pending_offset * x;
2302 // Artificial fields for java_lang_ref_Reference
2303 // The first field is for the discovered field added in 1.4
2304 java_lang_ref_Reference::number_of_fake_oop_fields = 1;
2305
2306 // java_lang_ref_SoftReference Class
2307 java_lang_ref_SoftReference::timestamp_offset = java_lang_ref_SoftReference::hc_timestamp_offset * x + header;
2308 // Don't multiply static fields because they are always in wordSize units
2309 java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x;
2310
2311 // java_lang_ClassLoader
2312 java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header;
2313
2314 // java_lang_System
2315 java_lang_System::static_in_offset = java_lang_System::hc_static_in_offset * x;
2316 java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x;
2317 java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x;
2318
2319 // java_lang_StackTraceElement
2320 java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset * x + header;
2321 java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header;
2322 java_lang_StackTraceElement::fileName_offset = java_lang_StackTraceElement::hc_fileName_offset * x + header;
2323 java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header;
2324 java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header;
2325 java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header;
2326 java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header;
2327 java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header;
2328 java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header;
2329
2330 }
2331
2332
2333 // Compute non-hard-coded field offsets of all the classes in this file
2334 void JavaClasses::compute_offsets() {
2335
2336 java_lang_Class::compute_offsets();
2337 java_lang_System::compute_offsets();
2338 java_lang_Thread::compute_offsets();
2339 java_lang_ThreadGroup::compute_offsets();
2340 java_security_AccessControlContext::compute_offsets();
2341 // Initialize reflection classes. The layouts of these classes
2342 // changed with the new reflection implementation in JDK 1.4, and
2343 // since the Universe doesn't know what JDK version it is until this
2344 // point we defer computation of these offsets until now.
2345 java_lang_reflect_AccessibleObject::compute_offsets();
2346 java_lang_reflect_Method::compute_offsets();
2347 java_lang_reflect_Constructor::compute_offsets();
2348 java_lang_reflect_Field::compute_offsets();
2349 if (JDK_Version::is_gte_jdk14x_version()) {
2350 java_nio_Buffer::compute_offsets();
2351 }
2352 if (JDK_Version::is_gte_jdk15x_version()) {
2353 sun_reflect_ConstantPool::compute_offsets();
2354 sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets();
2355 }
2356 sun_misc_AtomicLongCSImpl::compute_offsets();
2357 }
2358
2359 #ifndef PRODUCT
2360
2361 // These functions exist to assert the validity of hard-coded field offsets to guard
2362 // against changes in the class files
2363
2364 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
2365 EXCEPTION_MARK;
2366 fieldDescriptor fd;
2367 symbolHandle klass_sym = oopFactory::new_symbol_handle(klass_name, CATCH);
2368 klassOop k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
2369 instanceKlassHandle h_klass (THREAD, k);
2370 //instanceKlassHandle h_klass(klass);
2371 symbolHandle f_name = oopFactory::new_symbol_handle(field_name, CATCH);
2372 symbolHandle f_sig = oopFactory::new_symbol_handle(field_sig, CATCH);
2373 if (!h_klass->find_local_field(f_name(), f_sig(), &fd)) {
2374 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
2375 return false;
2376 }
2377 if (fd.is_static()) {
2378 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
2379 return false;
2380 }
2381 if (fd.offset() == hardcoded_offset ) {
2382 return true;
2383 } else {
2384 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
2385 klass_name, field_name, hardcoded_offset, fd.offset());
2386 return false;
2387 }
2388 }
2389
2390
2391 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
2392 EXCEPTION_MARK;
2393 fieldDescriptor fd;
2394 symbolHandle klass_sym = oopFactory::new_symbol_handle(klass_name, CATCH);
2395 klassOop k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
2396 instanceKlassHandle h_klass (THREAD, k);
2397 symbolHandle f_name = oopFactory::new_symbol_handle(field_name, CATCH);
2398 symbolHandle f_sig = oopFactory::new_symbol_handle(field_sig, CATCH);
2399 if (!h_klass->find_local_field(f_name(), f_sig(), &fd)) {
2400 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
2401 return false;
2402 }
2403 if (!fd.is_static()) {
2404 tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name);
2405 return false;
2406 }
2407 if (fd.offset() == hardcoded_offset + h_klass->offset_of_static_fields()) {
2408 return true;
2409 } else {
2410 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());
2411 return false;
2412 }
2413 }
2414
2415
2416 bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) {
2417 EXCEPTION_MARK;
2418 fieldDescriptor fd;
2419 symbolHandle klass_sym = oopFactory::new_symbol_handle(klass_name, CATCH);
2420 klassOop k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
2421 instanceKlassHandle h_klass (THREAD, k);
2422 symbolHandle f_name = oopFactory::new_symbol_handle(field_name, CATCH);
2423 symbolHandle f_sig = oopFactory::new_symbol_handle(field_sig, CATCH);
2424 if (!h_klass->find_local_field(f_name(), f_sig(), &fd)) {
2425 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
2426 return false;
2427 }
2428 if (!fd.is_static() || !fd.has_initial_value()) {
2429 tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name);
2430 return false;
2431 }
2432 if (!fd.initial_value_tag().is_int()) {
2433 tty->print_cr("Static field %s.%s is not an int", klass_name, field_name);
2434 return false;
2435 }
2436 jint field_value = fd.int_initial_value();
2437 if (field_value == hardcoded_constant) {
2438 return true;
2439 } else {
2440 tty->print_cr("Constant value of static field %s.%s is hardcoded as %d but should really be %d.", klass_name, field_name, hardcoded_constant, field_value);
2441 return false;
2442 }
2443 }
2444
2445
2446 // Check the hard-coded field offsets of all the classes in this file
2447
2448 void JavaClasses::check_offsets() {
2449 bool valid = true;
2450
2451 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
2452 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
2453
2454 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
2455 valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig)
2456
2457 #define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \
2458 valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig)
2459
2460 // java.lang.String
2461
2462 CHECK_OFFSET("java/lang/String", java_lang_String, value, "[C");
2463 CHECK_OFFSET("java/lang/String", java_lang_String, offset, "I");
2464 CHECK_OFFSET("java/lang/String", java_lang_String, count, "I");
2465 CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I");
2466
2467 // java.lang.Class
2468
2469 // Fake fields
2470 // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked
2471 // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked
2472 // CHECK_OFFSET("java/lang/Class", java_lang_Class, resolved_constructor); // %%% this needs to be checked
2473
2474 // java.lang.Throwable
2475
2476 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;");
2477 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;");
2478 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, cause, "Ljava/lang/Throwable;");
2479 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;");
2480
2481 // Boxed primitive objects (java_lang_boxing_object)
2482
2483 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
2484 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
2485 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
2486 CHECK_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
2487 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
2488 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
2489 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
2490 CHECK_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
2491
2492 // java.lang.ClassLoader
2493
2494 CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent, "Ljava/lang/ClassLoader;");
2495
2496 // java.lang.System
2497
2498 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, in, "Ljava/io/InputStream;");
2499 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;");
2500 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;");
2501
2502 // java.lang.StackTraceElement
2503
2504 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;");
2505 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;");
2506 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, fileName, "Ljava/lang/String;");
2507 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I");
2508
2509 // java.lang.ref.Reference
2510
2511 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
2512 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
2513 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
2514 // Fake field
2515 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
2516 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, lock, "Ljava/lang/ref/Reference$Lock;");
2517 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, pending, "Ljava/lang/ref/Reference;");
2518
2519 // java.lang.ref.SoftReference
2520
2521 CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J");
2522 CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J");
2523
2524 // java.lang.AssertionStatusDirectives
2525 //
2526 // The CheckAssertionStatusDirectives boolean can be removed from here and
2527 // globals.hpp after the AssertionStatusDirectives class has been integrated
2528 // into merlin "for some time." Without it, the vm will fail with early
2529 // merlin builds.
2530
2531 if (CheckAssertionStatusDirectives && JDK_Version::is_gte_jdk14x_version()) {
2532 const char* nm = "java/lang/AssertionStatusDirectives";
2533 const char* sig = "[Ljava/lang/String;";
2534 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig);
2535 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z");
2536 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig);
2537 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z");
2538 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z");
2539 }
2540
2541 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
2542 }
2543
2544 #endif // PRODUCT
2545
2546 void javaClasses_init() {
2547 JavaClasses::compute_offsets();
2548 JavaClasses::check_offsets();
2549 FilteredFieldsMap::initialize(); // must be done after computing offsets.
2550 }