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 HandleMark hm(thread);
151 ThreadToNativeFromVM ttn(thread);
152 js = (_to_java_string_fn)(thread->jni_environment(), str);
153 }
154 return Handle(THREAD, JNIHandles::resolve(js));
155 }
156
157 // Converts a Java String to a native C string that can be used for
158 // native OS calls.
159 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
160
161 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
162 static to_platform_string_fn_t _to_platform_string_fn = NULL;
163
164 if (_to_platform_string_fn == NULL) {
165 void *lib_handle = os::native_java_library();
166 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, hpi::dll_lookup(lib_handle, "GetStringPlatformChars"));
167 if (_to_platform_string_fn == NULL) {
168 fatal("GetStringPlatformChars missing");
169 }
170 }
171
172 char *native_platform_string;
173 { JavaThread* thread = (JavaThread*)THREAD;
174 assert(thread->is_Java_thread(), "must be java thread");
175 JNIEnv *env = thread->jni_environment();
176 jstring js = (jstring) JNIHandles::make_local(env, java_string());
177 bool is_copy;
178 HandleMark hm(thread);
179 ThreadToNativeFromVM ttn(thread);
180 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
181 assert(is_copy == JNI_TRUE, "is_copy value changed");
182 JNIHandles::destroy_local(js);
183 }
184 return native_platform_string;
185 }
186
187 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) {
188 oop obj = java_string();
189 // Typical usage is to convert all '/' to '.' in string.
190 typeArrayOop value = java_lang_String::value(obj);
191 int offset = java_lang_String::offset(obj);
192 int length = java_lang_String::length(obj);
193
194 // First check if any from_char exist
195 int index; // Declared outside, used later
196 for (index = 0; index < length; index++) {
197 if (value->char_at(index + offset) == from_char) {
198 break;
199 }
200 }
201 if (index == length) {
202 // No from_char, so do not copy.
203 return java_string;
204 }
205
206 // Create new UNICODE buffer. Must handlize value because GC
207 // may happen during String and char array creation.
208 typeArrayHandle h_value(THREAD, value);
209 Handle string = basic_create(length, false, CHECK_NH);
210
211 typeArrayOop from_buffer = h_value();
212 typeArrayOop to_buffer = java_lang_String::value(string());
213
214 // Copy contents
215 for (index = 0; index < length; index++) {
216 jchar c = from_buffer->char_at(index + offset);
217 if (c == from_char) {
218 c = to_char;
219 }
220 to_buffer->char_at_put(index, c);
221 }
222 return string;
223 }
224
225 jchar* java_lang_String::as_unicode_string(oop java_string, int& length) {
226 typeArrayOop value = java_lang_String::value(java_string);
227 int offset = java_lang_String::offset(java_string);
228 length = java_lang_String::length(java_string);
229
230 jchar* result = NEW_RESOURCE_ARRAY(jchar, length);
231 for (int index = 0; index < length; index++) {
232 result[index] = value->char_at(index + offset);
233 }
234 return result;
235 }
236
237 symbolHandle java_lang_String::as_symbol(Handle java_string, TRAPS) {
238 oop obj = java_string();
239 typeArrayOop value = java_lang_String::value(obj);
240 int offset = java_lang_String::offset(obj);
241 int length = java_lang_String::length(obj);
242
243 ResourceMark rm(THREAD);
244 symbolHandle result;
245
246 if (length > 0) {
247 int utf8_length = UNICODE::utf8_length(value->char_at_addr(offset), length);
248 char* chars = NEW_RESOURCE_ARRAY(char, utf8_length + 1);
249 UNICODE::convert_to_utf8(value->char_at_addr(offset), length, chars);
250 // Allocate the symbol
251 result = oopFactory::new_symbol_handle(chars, utf8_length, CHECK_(symbolHandle()));
252 } else {
253 result = oopFactory::new_symbol_handle("", 0, CHECK_(symbolHandle()));
254 }
255 return result;
256 }
257
258 int java_lang_String::utf8_length(oop java_string) {
259 typeArrayOop value = java_lang_String::value(java_string);
260 int offset = java_lang_String::offset(java_string);
261 int length = java_lang_String::length(java_string);
262 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
263 return UNICODE::utf8_length(position, length);
264 }
265
266 char* java_lang_String::as_utf8_string(oop java_string) {
267 typeArrayOop value = java_lang_String::value(java_string);
268 int offset = java_lang_String::offset(java_string);
269 int length = java_lang_String::length(java_string);
270 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
271 return UNICODE::as_utf8(position, length);
272 }
273
274 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
275 typeArrayOop value = java_lang_String::value(java_string);
276 int offset = java_lang_String::offset(java_string);
277 int length = java_lang_String::length(java_string);
278 assert(start + len <= length, "just checking");
279 jchar* position = value->char_at_addr(offset + start);
280 return UNICODE::as_utf8(position, len);
281 }
282
283 bool java_lang_String::equals(oop java_string, jchar* chars, int len) {
284 assert(SharedSkipVerify ||
285 java_string->klass() == SystemDictionary::string_klass(),
286 "must be java_string");
287 typeArrayOop value = java_lang_String::value(java_string);
288 int offset = java_lang_String::offset(java_string);
289 int length = java_lang_String::length(java_string);
290 if (length != len) {
291 return false;
292 }
293 for (int i = 0; i < len; i++) {
294 if (value->char_at(i + offset) != chars[i]) {
295 return false;
296 }
297 }
298 return true;
299 }
300
301 void java_lang_String::print(Handle java_string, outputStream* st) {
302 oop obj = java_string();
303 assert(obj->klass() == SystemDictionary::string_klass(), "must be java_string");
304 typeArrayOop value = java_lang_String::value(obj);
305 int offset = java_lang_String::offset(obj);
306 int length = java_lang_String::length(obj);
307
308 int end = MIN2(length, 100);
309 if (value == NULL) {
310 // This can happen if, e.g., printing a String
311 // object before its initializer has been called
312 st->print_cr("NULL");
313 } else {
314 st->print("\"");
315 for (int index = 0; index < length; index++) {
316 st->print("%c", value->char_at(index + offset));
317 }
318 st->print("\"");
319 }
320 }
321
322
323 oop java_lang_Class::create_mirror(KlassHandle k, TRAPS) {
324 assert(k->java_mirror() == NULL, "should only assign mirror once");
325 // Use this moment of initialization to cache modifier_flags also,
326 // to support Class.getModifiers(). Instance classes recalculate
327 // the cached flags after the class file is parsed, but before the
328 // class is put into the system dictionary.
329 int computed_modifiers = k->compute_modifier_flags(CHECK_0);
330 k->set_modifier_flags(computed_modifiers);
331 if (SystemDictionary::class_klass_loaded()) {
332 // Allocate mirror (java.lang.Class instance)
333 Handle mirror = instanceKlass::cast(SystemDictionary::class_klass())->allocate_permanent_instance(CHECK_0);
334 // Setup indirections
335 mirror->obj_field_put(klass_offset, k());
336 k->set_java_mirror(mirror());
337 // It might also have a component mirror. This mirror must already exist.
338 if (k->oop_is_javaArray()) {
339 Handle comp_mirror;
340 if (k->oop_is_typeArray()) {
341 BasicType type = typeArrayKlass::cast(k->as_klassOop())->element_type();
342 comp_mirror = Universe::java_mirror(type);
343 assert(comp_mirror.not_null(), "must have primitive mirror");
344 } else if (k->oop_is_objArray()) {
345 klassOop element_klass = objArrayKlass::cast(k->as_klassOop())->element_klass();
346 if (element_klass != NULL
347 && (Klass::cast(element_klass)->oop_is_instance() ||
348 Klass::cast(element_klass)->oop_is_javaArray())) {
349 comp_mirror = Klass::cast(element_klass)->java_mirror();
350 assert(comp_mirror.not_null(), "must have element mirror");
351 }
352 // else some object array internal to the VM, like systemObjArrayKlassObj
353 }
354 if (comp_mirror.not_null()) {
355 // Two-way link between the array klass and its component mirror:
356 arrayKlass::cast(k->as_klassOop())->set_component_mirror(comp_mirror());
357 set_array_klass(comp_mirror(), k->as_klassOop());
358 }
359 }
360 return mirror();
361 } else {
362 return NULL;
363 }
364 }
365
366
367 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
368 // This should be improved by adding a field at the Java level or by
369 // introducing a new VM klass (see comment in ClassFileParser)
370 oop java_class = instanceKlass::cast(SystemDictionary::class_klass())->allocate_permanent_instance(CHECK_0);
371 if (type != T_VOID) {
372 klassOop aklass = Universe::typeArrayKlassObj(type);
373 assert(aklass != NULL, "correct bootstrap");
374 set_array_klass(java_class, aklass);
375 }
376 return java_class;
377 }
378
379
380 klassOop java_lang_Class::as_klassOop(oop java_class) {
381 //%note memory_2
382 klassOop k = klassOop(java_class->obj_field(klass_offset));
383 assert(k == NULL || k->is_klass(), "type check");
384 return k;
385 }
386
387
388 klassOop java_lang_Class::array_klass(oop java_class) {
389 klassOop k = klassOop(java_class->obj_field(array_klass_offset));
390 assert(k == NULL || k->is_klass() && Klass::cast(k)->oop_is_javaArray(), "should be array klass");
391 return k;
392 }
393
394
395 void java_lang_Class::set_array_klass(oop java_class, klassOop klass) {
396 assert(klass->is_klass() && Klass::cast(klass)->oop_is_javaArray(), "should be array klass");
397 java_class->obj_field_put(array_klass_offset, klass);
398 }
399
400
401 methodOop java_lang_Class::resolved_constructor(oop java_class) {
402 oop constructor = java_class->obj_field(resolved_constructor_offset);
403 assert(constructor == NULL || constructor->is_method(), "should be method");
404 return methodOop(constructor);
405 }
406
407
408 void java_lang_Class::set_resolved_constructor(oop java_class, methodOop constructor) {
409 assert(constructor->is_method(), "should be method");
410 java_class->obj_field_put(resolved_constructor_offset, constructor);
411 }
412
413
414 bool java_lang_Class::is_primitive(oop java_class) {
415 klassOop k = klassOop(java_class->obj_field(klass_offset));
416 return k == NULL;
417 }
418
419
420 BasicType java_lang_Class::primitive_type(oop java_class) {
421 assert(java_lang_Class::is_primitive(java_class), "just checking");
422 klassOop ak = klassOop(java_class->obj_field(array_klass_offset));
423 BasicType type = T_VOID;
424 if (ak != NULL) {
425 // Note: create_basic_type_mirror above initializes ak to a non-null value.
426 type = arrayKlass::cast(ak)->element_type();
427 } else {
428 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
429 }
430 assert(Universe::java_mirror(type) == java_class, "must be consistent");
431 return type;
432 }
433
434
435 oop java_lang_Class::primitive_mirror(BasicType t) {
436 oop mirror = Universe::java_mirror(t);
437 assert(mirror != NULL && mirror->is_a(SystemDictionary::class_klass()), "must be a Class");
438 assert(java_lang_Class::is_primitive(mirror), "must be primitive");
439 return mirror;
440 }
441
442 bool java_lang_Class::offsets_computed = false;
443 int java_lang_Class::classRedefinedCount_offset = -1;
444
445 void java_lang_Class::compute_offsets() {
446 assert(!offsets_computed, "offsets should be initialized only once");
447 offsets_computed = true;
448
449 klassOop k = SystemDictionary::class_klass();
450 // The classRedefinedCount field is only present starting in 1.5,
451 // so don't go fatal.
452 compute_optional_offset(classRedefinedCount_offset,
453 k, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature());
454 }
455
456 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
457 if (!JDK_Version::is_gte_jdk15x_version()
458 || classRedefinedCount_offset == -1) {
459 // The classRedefinedCount field is only present starting in 1.5.
460 // If we don't have an offset for it then just return -1 as a marker.
461 return -1;
462 }
463
464 return the_class_mirror->int_field(classRedefinedCount_offset);
465 }
466
467 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
468 if (!JDK_Version::is_gte_jdk15x_version()
469 || classRedefinedCount_offset == -1) {
470 // The classRedefinedCount field is only present starting in 1.5.
471 // If we don't have an offset for it then nothing to set.
472 return;
473 }
474
475 the_class_mirror->int_field_put(classRedefinedCount_offset, value);
476 }
477
478
479 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
480 // platform thread structure, and a eetop offset which was used for thread
481 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
482 // merged, so in the HotSpot VM we just use the eetop field for the thread
483 // instead of the privateInfo_offset.
484 //
485 // Note: The stackSize field is only present starting in 1.4.
486
487 int java_lang_Thread::_name_offset = 0;
488 int java_lang_Thread::_group_offset = 0;
489 int java_lang_Thread::_contextClassLoader_offset = 0;
490 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
491 int java_lang_Thread::_priority_offset = 0;
492 int java_lang_Thread::_eetop_offset = 0;
493 int java_lang_Thread::_daemon_offset = 0;
494 int java_lang_Thread::_stillborn_offset = 0;
495 int java_lang_Thread::_stackSize_offset = 0;
496 int java_lang_Thread::_tid_offset = 0;
497 int java_lang_Thread::_thread_status_offset = 0;
498 int java_lang_Thread::_park_blocker_offset = 0;
499 int java_lang_Thread::_park_event_offset = 0 ;
500
501
502 void java_lang_Thread::compute_offsets() {
503 assert(_group_offset == 0, "offsets should be initialized only once");
504
505 klassOop k = SystemDictionary::thread_klass();
506 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::char_array_signature());
507 compute_offset(_group_offset, k, vmSymbols::group_name(), vmSymbols::threadgroup_signature());
508 compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature());
509 compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature());
510 compute_offset(_priority_offset, k, vmSymbols::priority_name(), vmSymbols::int_signature());
511 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
512 compute_offset(_eetop_offset, k, vmSymbols::eetop_name(), vmSymbols::long_signature());
513 compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature());
514 // The stackSize field is only present starting in 1.4, so don't go fatal.
515 compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature());
516 // The tid and thread_status fields are only present starting in 1.5, so don't go fatal.
517 compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature());
518 compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature());
519 // The parkBlocker field is only present starting in 1.6, so don't go fatal.
520 compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature());
521 compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(),
522 vmSymbols::long_signature());
523 }
524
525
526 JavaThread* java_lang_Thread::thread(oop java_thread) {
527 return (JavaThread*)java_thread->address_field(_eetop_offset);
528 }
529
530
531 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
532 java_thread->address_field_put(_eetop_offset, (address)thread);
533 }
534
535
536 typeArrayOop java_lang_Thread::name(oop java_thread) {
537 oop name = java_thread->obj_field(_name_offset);
538 assert(name == NULL || (name->is_typeArray() && typeArrayKlass::cast(name->klass())->element_type() == T_CHAR), "just checking");
539 return typeArrayOop(name);
540 }
541
542
543 void java_lang_Thread::set_name(oop java_thread, typeArrayOop name) {
544 assert(java_thread->obj_field(_name_offset) == NULL, "name should be NULL");
545 java_thread->obj_field_put(_name_offset, name);
546 }
547
548
549 ThreadPriority java_lang_Thread::priority(oop java_thread) {
550 return (ThreadPriority)java_thread->int_field(_priority_offset);
551 }
552
553
554 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
555 java_thread->int_field_put(_priority_offset, priority);
556 }
557
558
559 oop java_lang_Thread::threadGroup(oop java_thread) {
560 return java_thread->obj_field(_group_offset);
561 }
562
563
564 bool java_lang_Thread::is_stillborn(oop java_thread) {
565 return java_thread->bool_field(_stillborn_offset) != 0;
566 }
567
568
569 // We never have reason to turn the stillborn bit off
570 void java_lang_Thread::set_stillborn(oop java_thread) {
571 java_thread->bool_field_put(_stillborn_offset, true);
572 }
573
574
575 bool java_lang_Thread::is_alive(oop java_thread) {
576 JavaThread* thr = java_lang_Thread::thread(java_thread);
577 return (thr != NULL);
578 }
579
580
581 bool java_lang_Thread::is_daemon(oop java_thread) {
582 return java_thread->bool_field(_daemon_offset) != 0;
583 }
584
585
586 void java_lang_Thread::set_daemon(oop java_thread) {
587 java_thread->bool_field_put(_daemon_offset, true);
588 }
589
590 oop java_lang_Thread::context_class_loader(oop java_thread) {
591 return java_thread->obj_field(_contextClassLoader_offset);
592 }
593
594 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
595 return java_thread->obj_field(_inheritedAccessControlContext_offset);
596 }
597
598
599 jlong java_lang_Thread::stackSize(oop java_thread) {
600 // The stackSize field is only present starting in 1.4
601 if (_stackSize_offset > 0) {
602 assert(JDK_Version::is_gte_jdk14x_version(), "sanity check");
603 return java_thread->long_field(_stackSize_offset);
604 } else {
605 return 0;
606 }
607 }
608
609 // Write the thread status value to threadStatus field in java.lang.Thread java class.
610 void java_lang_Thread::set_thread_status(oop java_thread,
611 java_lang_Thread::ThreadStatus status) {
612 assert(JavaThread::current()->thread_state() == _thread_in_vm, "Java Thread is not running in vm");
613 // The threadStatus is only present starting in 1.5
614 if (_thread_status_offset > 0) {
615 java_thread->int_field_put(_thread_status_offset, status);
616 }
617 }
618
619 // Read thread status value from threadStatus field in java.lang.Thread java class.
620 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
621 assert(Thread::current()->is_VM_thread() ||
622 JavaThread::current()->thread_state() == _thread_in_vm,
623 "Java Thread is not running in vm");
624 // The threadStatus is only present starting in 1.5
625 if (_thread_status_offset > 0) {
626 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
627 } else {
628 // All we can easily figure out is if it is alive, but that is
629 // enough info for a valid unknown status.
630 // These aren't restricted to valid set ThreadStatus values, so
631 // use JVMTI values and cast.
632 JavaThread* thr = java_lang_Thread::thread(java_thread);
633 if (thr == NULL) {
634 // the thread hasn't run yet or is in the process of exiting
635 return NEW;
636 }
637 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE;
638 }
639 }
640
641
642 jlong java_lang_Thread::thread_id(oop java_thread) {
643 // The thread ID field is only present starting in 1.5
644 if (_tid_offset > 0) {
645 return java_thread->long_field(_tid_offset);
646 } else {
647 return 0;
648 }
649 }
650
651 oop java_lang_Thread::park_blocker(oop java_thread) {
652 assert(JDK_Version::supports_thread_park_blocker() && _park_blocker_offset != 0,
653 "Must support parkBlocker field");
654
655 if (_park_blocker_offset > 0) {
656 return java_thread->obj_field(_park_blocker_offset);
657 }
658
659 return NULL;
660 }
661
662 jlong java_lang_Thread::park_event(oop java_thread) {
663 if (_park_event_offset > 0) {
664 return java_thread->long_field(_park_event_offset);
665 }
666 return 0;
667 }
668
669 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) {
670 if (_park_event_offset > 0) {
671 java_thread->long_field_put(_park_event_offset, ptr);
672 return true;
673 }
674 return false;
675 }
676
677
678 const char* java_lang_Thread::thread_status_name(oop java_thread) {
679 assert(JDK_Version::is_gte_jdk15x_version() && _thread_status_offset != 0, "Must have thread status");
680 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
681 switch (status) {
682 case NEW : return "NEW";
683 case RUNNABLE : return "RUNNABLE";
684 case SLEEPING : return "TIMED_WAITING (sleeping)";
685 case IN_OBJECT_WAIT : return "WAITING (on object monitor)";
686 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
687 case PARKED : return "WAITING (parking)";
688 case PARKED_TIMED : return "TIMED_WAITING (parking)";
689 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
690 case TERMINATED : return "TERMINATED";
691 default : return "UNKNOWN";
692 };
693 }
694 int java_lang_ThreadGroup::_parent_offset = 0;
695 int java_lang_ThreadGroup::_name_offset = 0;
696 int java_lang_ThreadGroup::_threads_offset = 0;
697 int java_lang_ThreadGroup::_groups_offset = 0;
698 int java_lang_ThreadGroup::_maxPriority_offset = 0;
699 int java_lang_ThreadGroup::_destroyed_offset = 0;
700 int java_lang_ThreadGroup::_daemon_offset = 0;
701 int java_lang_ThreadGroup::_vmAllowSuspension_offset = 0;
702 int java_lang_ThreadGroup::_nthreads_offset = 0;
703 int java_lang_ThreadGroup::_ngroups_offset = 0;
704
705 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
706 assert(java_thread_group->is_oop(), "thread group must be oop");
707 return java_thread_group->obj_field(_parent_offset);
708 }
709
710 // ("name as oop" accessor is not necessary)
711
712 typeArrayOop java_lang_ThreadGroup::name(oop java_thread_group) {
713 oop name = java_thread_group->obj_field(_name_offset);
714 // ThreadGroup.name can be null
715 return name == NULL ? (typeArrayOop)NULL : java_lang_String::value(name);
716 }
717
718 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
719 assert(java_thread_group->is_oop(), "thread group must be oop");
720 return java_thread_group->int_field(_nthreads_offset);
721 }
722
723 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
724 oop threads = java_thread_group->obj_field(_threads_offset);
725 assert(threads != NULL, "threadgroups should have threads");
726 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
727 return objArrayOop(threads);
728 }
729
730 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
731 assert(java_thread_group->is_oop(), "thread group must be oop");
732 return java_thread_group->int_field(_ngroups_offset);
733 }
734
735 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
736 oop groups = java_thread_group->obj_field(_groups_offset);
737 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
738 return objArrayOop(groups);
739 }
740
741 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
742 assert(java_thread_group->is_oop(), "thread group must be oop");
743 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
744 }
745
746 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
747 assert(java_thread_group->is_oop(), "thread group must be oop");
748 return java_thread_group->bool_field(_destroyed_offset) != 0;
749 }
750
751 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
752 assert(java_thread_group->is_oop(), "thread group must be oop");
753 return java_thread_group->bool_field(_daemon_offset) != 0;
754 }
755
756 bool java_lang_ThreadGroup::is_vmAllowSuspension(oop java_thread_group) {
757 assert(java_thread_group->is_oop(), "thread group must be oop");
758 return java_thread_group->bool_field(_vmAllowSuspension_offset) != 0;
759 }
760
761 void java_lang_ThreadGroup::compute_offsets() {
762 assert(_parent_offset == 0, "offsets should be initialized only once");
763
764 klassOop k = SystemDictionary::threadGroup_klass();
765
766 compute_offset(_parent_offset, k, vmSymbols::parent_name(), vmSymbols::threadgroup_signature());
767 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
768 compute_offset(_threads_offset, k, vmSymbols::threads_name(), vmSymbols::thread_array_signature());
769 compute_offset(_groups_offset, k, vmSymbols::groups_name(), vmSymbols::threadgroup_array_signature());
770 compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature());
771 compute_offset(_destroyed_offset, k, vmSymbols::destroyed_name(), vmSymbols::bool_signature());
772 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
773 compute_offset(_vmAllowSuspension_offset, k, vmSymbols::vmAllowSuspension_name(), vmSymbols::bool_signature());
774 compute_offset(_nthreads_offset, k, vmSymbols::nthreads_name(), vmSymbols::int_signature());
775 compute_offset(_ngroups_offset, k, vmSymbols::ngroups_name(), vmSymbols::int_signature());
776 }
777
778 oop java_lang_Throwable::backtrace(oop throwable) {
779 return throwable->obj_field_acquire(backtrace_offset);
780 }
781
782
783 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
784 throwable->release_obj_field_put(backtrace_offset, value);
785 }
786
787
788 oop java_lang_Throwable::message(oop throwable) {
789 return throwable->obj_field(detailMessage_offset);
790 }
791
792
793 oop java_lang_Throwable::message(Handle throwable) {
794 return throwable->obj_field(detailMessage_offset);
795 }
796
797
798 void java_lang_Throwable::set_message(oop throwable, oop value) {
799 throwable->obj_field_put(detailMessage_offset, value);
800 }
801
802
803 void java_lang_Throwable::clear_stacktrace(oop throwable) {
804 assert(JDK_Version::is_gte_jdk14x_version(), "should only be called in >= 1.4");
805 throwable->obj_field_put(stackTrace_offset, NULL);
806 }
807
808
809 void java_lang_Throwable::print(oop throwable, outputStream* st) {
810 ResourceMark rm;
811 klassOop k = throwable->klass();
812 assert(k != NULL, "just checking");
813 st->print("%s", instanceKlass::cast(k)->external_name());
814 oop msg = message(throwable);
815 if (msg != NULL) {
816 st->print(": %s", java_lang_String::as_utf8_string(msg));
817 }
818 }
819
820
821 void java_lang_Throwable::print(Handle throwable, outputStream* st) {
822 ResourceMark rm;
823 klassOop k = throwable->klass();
824 assert(k != NULL, "just checking");
825 st->print("%s", instanceKlass::cast(k)->external_name());
826 oop msg = message(throwable);
827 if (msg != NULL) {
828 st->print(": %s", java_lang_String::as_utf8_string(msg));
829 }
830 }
831
832 // Print stack trace element to resource allocated buffer
833 char* java_lang_Throwable::print_stack_element_to_buffer(methodOop method, int bci) {
834 // Get strings and string lengths
835 instanceKlass* klass = instanceKlass::cast(method->method_holder());
836 const char* klass_name = klass->external_name();
837 int buf_len = (int)strlen(klass_name);
838 char* source_file_name;
839 if (klass->source_file_name() == NULL) {
840 source_file_name = NULL;
841 } else {
842 source_file_name = klass->source_file_name()->as_C_string();
843 buf_len += (int)strlen(source_file_name);
844 }
845 char* method_name = method->name()->as_C_string();
846 buf_len += (int)strlen(method_name);
847
848 // Allocate temporary buffer with extra space for formatting and line number
849 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
850
851 // Print stack trace line in buffer
852 sprintf(buf, "\tat %s.%s", klass_name, method_name);
853 if (method->is_native()) {
854 strcat(buf, "(Native Method)");
855 } else {
856 int line_number = method->line_number_from_bci(bci);
857 if (source_file_name != NULL && (line_number != -1)) {
858 // Sourcename and linenumber
859 sprintf(buf + (int)strlen(buf), "(%s:%d)", source_file_name, line_number);
860 } else if (source_file_name != NULL) {
861 // Just sourcename
862 sprintf(buf + (int)strlen(buf), "(%s)", source_file_name);
863 } else {
864 // Neither soucename and linenumber
865 sprintf(buf + (int)strlen(buf), "(Unknown Source)");
866 }
867 nmethod* nm = method->code();
868 if (WizardMode && nm != NULL) {
869 sprintf(buf + (int)strlen(buf), "(nmethod %#x)", nm);
870 }
871 }
872
873 return buf;
874 }
875
876
877 void java_lang_Throwable::print_stack_element(Handle stream, methodOop method, int bci) {
878 ResourceMark rm;
879 char* buf = print_stack_element_to_buffer(method, bci);
880 print_to_stream(stream, buf);
881 }
882
883 void java_lang_Throwable::print_stack_element(outputStream *st, methodOop method, int bci) {
884 ResourceMark rm;
885 char* buf = print_stack_element_to_buffer(method, bci);
886 st->print_cr("%s", buf);
887 }
888
889 void java_lang_Throwable::print_to_stream(Handle stream, const char* str) {
890 if (stream.is_null()) {
891 tty->print_cr("%s", str);
892 } else {
893 EXCEPTION_MARK;
894 JavaValue result(T_VOID);
895 Handle arg (THREAD, oopFactory::new_charArray(str, THREAD));
896 if (!HAS_PENDING_EXCEPTION) {
897 JavaCalls::call_virtual(&result,
898 stream,
899 KlassHandle(THREAD, stream->klass()),
900 vmSymbolHandles::println_name(),
901 vmSymbolHandles::char_array_void_signature(),
902 arg,
903 THREAD);
904 }
905 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
906 if (HAS_PENDING_EXCEPTION) CLEAR_PENDING_EXCEPTION;
907 }
908
909 }
910
911
912 const char* java_lang_Throwable::no_stack_trace_message() {
913 return "\t<<no stack trace available>>";
914 }
915
916
917 // Currently used only for exceptions occurring during startup
918 void java_lang_Throwable::print_stack_trace(oop throwable, outputStream* st) {
919 Thread *THREAD = Thread::current();
920 Handle h_throwable(THREAD, throwable);
921 while (h_throwable.not_null()) {
922 objArrayHandle result (THREAD, objArrayOop(backtrace(h_throwable())));
923 if (result.is_null()) {
924 st->print_cr(no_stack_trace_message());
925 return;
926 }
927
928 while (result.not_null()) {
929 objArrayHandle methods (THREAD,
930 objArrayOop(result->obj_at(trace_methods_offset)));
931 typeArrayHandle bcis (THREAD,
932 typeArrayOop(result->obj_at(trace_bcis_offset)));
933
934 if (methods.is_null() || bcis.is_null()) {
935 st->print_cr(no_stack_trace_message());
936 return;
937 }
938
939 int length = methods()->length();
940 for (int index = 0; index < length; index++) {
941 methodOop method = methodOop(methods()->obj_at(index));
942 if (method == NULL) goto handle_cause;
943 int bci = bcis->ushort_at(index);
944 print_stack_element(st, method, bci);
945 }
946 result = objArrayHandle(THREAD, objArrayOop(result->obj_at(trace_next_offset)));
947 }
948 handle_cause:
949 {
950 EXCEPTION_MARK;
951 JavaValue result(T_OBJECT);
952 JavaCalls::call_virtual(&result,
953 h_throwable,
954 KlassHandle(THREAD, h_throwable->klass()),
955 vmSymbolHandles::getCause_name(),
956 vmSymbolHandles::void_throwable_signature(),
957 THREAD);
958 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
959 if (HAS_PENDING_EXCEPTION) {
960 CLEAR_PENDING_EXCEPTION;
961 h_throwable = Handle();
962 } else {
963 h_throwable = Handle(THREAD, (oop) result.get_jobject());
964 if (h_throwable.not_null()) {
965 st->print("Caused by: ");
966 print(h_throwable, st);
967 st->cr();
968 }
969 }
970 }
971 }
972 }
973
974
975 void java_lang_Throwable::print_stack_trace(oop throwable, oop print_stream) {
976 // Note: this is no longer used in Merlin, but we support it for compatibility.
977 Thread *thread = Thread::current();
978 Handle stream(thread, print_stream);
979 objArrayHandle result (thread, objArrayOop(backtrace(throwable)));
980 if (result.is_null()) {
981 print_to_stream(stream, no_stack_trace_message());
982 return;
983 }
984
985 while (result.not_null()) {
986 objArrayHandle methods (thread,
987 objArrayOop(result->obj_at(trace_methods_offset)));
988 typeArrayHandle bcis (thread,
989 typeArrayOop(result->obj_at(trace_bcis_offset)));
990
991 if (methods.is_null() || bcis.is_null()) {
992 print_to_stream(stream, no_stack_trace_message());
993 return;
994 }
995
996 int length = methods()->length();
997 for (int index = 0; index < length; index++) {
998 methodOop method = methodOop(methods()->obj_at(index));
999 if (method == NULL) return;
1000 int bci = bcis->ushort_at(index);
1001 print_stack_element(stream, method, bci);
1002 }
1003 result = objArrayHandle(thread, objArrayOop(result->obj_at(trace_next_offset)));
1004 }
1005 }
1006
1007 // This class provides a simple wrapper over the internal structure of
1008 // exception backtrace to insulate users of the backtrace from needing
1009 // to know what it looks like.
1010 class BacktraceBuilder: public StackObj {
1011 private:
1012 Handle _backtrace;
1013 objArrayOop _head;
1014 objArrayOop _methods;
1015 typeArrayOop _bcis;
1016 int _index;
1017 bool _dirty;
1018 No_Safepoint_Verifier _nsv;
1019
1020 public:
1021
1022 enum {
1023 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
1024 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
1025 trace_next_offset = java_lang_Throwable::trace_next_offset,
1026 trace_size = java_lang_Throwable::trace_size,
1027 trace_chunk_size = java_lang_Throwable::trace_chunk_size
1028 };
1029
1030 // constructor for new backtrace
1031 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _dirty(false) {
1032 expand(CHECK);
1033 _backtrace = _head;
1034 _index = 0;
1035 }
1036
1037 void flush() {
1038 if (_dirty && _methods != NULL) {
1039 BarrierSet* bs = Universe::heap()->barrier_set();
1040 assert(bs->has_write_ref_array_opt(), "Barrier set must have ref array opt");
1041 bs->write_ref_array(MemRegion((HeapWord*)_methods->base(),
1042 _methods->array_size()));
1043 _dirty = false;
1044 }
1045 }
1046
1047 void expand(TRAPS) {
1048 flush();
1049
1050 objArrayHandle old_head(THREAD, _head);
1051 Pause_No_Safepoint_Verifier pnsv(&_nsv);
1052
1053 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
1054 objArrayHandle new_head(THREAD, head);
1055
1056 objArrayOop methods = oopFactory::new_objectArray(trace_chunk_size, CHECK);
1057 objArrayHandle new_methods(THREAD, methods);
1058
1059 typeArrayOop bcis = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1060 typeArrayHandle new_bcis(THREAD, bcis);
1061
1062 if (!old_head.is_null()) {
1063 old_head->obj_at_put(trace_next_offset, new_head());
1064 }
1065 new_head->obj_at_put(trace_methods_offset, new_methods());
1066 new_head->obj_at_put(trace_bcis_offset, new_bcis());
1067
1068 _head = new_head();
1069 _methods = new_methods();
1070 _bcis = new_bcis();
1071 _index = 0;
1072 }
1073
1074 oop backtrace() {
1075 flush();
1076 return _backtrace();
1077 }
1078
1079 inline void push(methodOop method, short bci, TRAPS) {
1080 if (_index >= trace_chunk_size) {
1081 methodHandle mhandle(THREAD, method);
1082 expand(CHECK);
1083 method = mhandle();
1084 }
1085
1086 _methods->obj_at_put(_index, method);
1087 // bad for UseCompressedOops
1088 // *_methods->obj_at_addr(_index) = method;
1089 _bcis->ushort_at_put(_index, bci);
1090 _index++;
1091 _dirty = true;
1092 }
1093
1094 methodOop current_method() {
1095 assert(_index >= 0 && _index < trace_chunk_size, "out of range");
1096 return methodOop(_methods->obj_at(_index));
1097 }
1098
1099 jushort current_bci() {
1100 assert(_index >= 0 && _index < trace_chunk_size, "out of range");
1101 return _bcis->ushort_at(_index);
1102 }
1103 };
1104
1105
1106 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, TRAPS) {
1107 if (!StackTraceInThrowable) return;
1108 ResourceMark rm(THREAD);
1109
1110 // Start out by clearing the backtrace for this object, in case the VM
1111 // runs out of memory while allocating the stack trace
1112 set_backtrace(throwable(), NULL);
1113 if (JDK_Version::is_gte_jdk14x_version()) {
1114 // New since 1.4, clear lazily constructed Java level stacktrace if
1115 // refilling occurs
1116 clear_stacktrace(throwable());
1117 }
1118
1119 int max_depth = MaxJavaStackTraceDepth;
1120 JavaThread* thread = (JavaThread*)THREAD;
1121 BacktraceBuilder bt(CHECK);
1122
1123 // Instead of using vframe directly, this version of fill_in_stack_trace
1124 // basically handles everything by hand. This significantly improved the
1125 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
1126 // See bug 6333838 for more details.
1127 // The "ASSERT" here is to verify this method generates the exactly same stack
1128 // trace as utilizing vframe.
1129 #ifdef ASSERT
1130 vframeStream st(thread);
1131 methodHandle st_method(THREAD, st.method());
1132 #endif
1133 int total_count = 0;
1134 RegisterMap map(thread, false);
1135 int decode_offset = 0;
1136 nmethod* nm = NULL;
1137 bool skip_fillInStackTrace_check = false;
1138 bool skip_throwableInit_check = false;
1139
1140 for (frame fr = thread->last_frame(); max_depth != total_count;) {
1141 methodOop method = NULL;
1142 int bci = 0;
1143
1144 // Compiled java method case.
1145 if (decode_offset != 0) {
1146 DebugInfoReadStream stream(nm, decode_offset);
1147 decode_offset = stream.read_int();
1148 method = (methodOop)nm->oop_at(stream.read_int());
1149 bci = stream.read_bci();
1150 } else {
1151 if (fr.is_first_frame()) break;
1152 address pc = fr.pc();
1153 if (fr.is_interpreted_frame()) {
1154 intptr_t bcx = fr.interpreter_frame_bcx();
1155 method = fr.interpreter_frame_method();
1156 bci = fr.is_bci(bcx) ? bcx : method->bci_from((address)bcx);
1157 fr = fr.sender(&map);
1158 } else {
1159 CodeBlob* cb = fr.cb();
1160 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
1161 // but non nmethod
1162 fr = fr.sender(&map);
1163 if (cb == NULL || !cb->is_nmethod()) {
1164 continue;
1165 }
1166 nm = (nmethod*)cb;
1167 if (nm->method()->is_native()) {
1168 method = nm->method();
1169 bci = 0;
1170 } else {
1171 PcDesc* pd = nm->pc_desc_at(pc);
1172 decode_offset = pd->scope_decode_offset();
1173 // if decode_offset is not equal to 0, it will execute the
1174 // "compiled java method case" at the beginning of the loop.
1175 continue;
1176 }
1177 }
1178 }
1179 #ifdef ASSERT
1180 assert(st_method() == method && st.bci() == bci,
1181 "Wrong stack trace");
1182 st.next();
1183 // vframeStream::method isn't GC-safe so store off a copy
1184 // of the methodOop in case we GC.
1185 if (!st.at_end()) {
1186 st_method = st.method();
1187 }
1188 #endif
1189 if (!skip_fillInStackTrace_check) {
1190 // check "fillInStackTrace" only once, so we negate the flag
1191 // after the first time check.
1192 skip_fillInStackTrace_check = true;
1193 if (method->name() == vmSymbols::fillInStackTrace_name()) {
1194 continue;
1195 }
1196 }
1197 // skip <init> methods of the exceptions klass. If there is <init> methods
1198 // that belongs to a superclass of the exception we are going to skipping
1199 // them in stack trace. This is simlar to classic VM.
1200 if (!skip_throwableInit_check) {
1201 if (method->name() == vmSymbols::object_initializer_name() &&
1202 throwable->is_a(method->method_holder())) {
1203 continue;
1204 } else {
1205 // if no "Throwable.init()" method found, we stop checking it next time.
1206 skip_throwableInit_check = true;
1207 }
1208 }
1209 bt.push(method, bci, CHECK);
1210 total_count++;
1211 }
1212
1213 // Put completed stack trace into throwable object
1214 set_backtrace(throwable(), bt.backtrace());
1215 }
1216
1217 void java_lang_Throwable::fill_in_stack_trace(Handle throwable) {
1218 // No-op if stack trace is disabled
1219 if (!StackTraceInThrowable) {
1220 return;
1221 }
1222
1223 // Disable stack traces for some preallocated out of memory errors
1224 if (!Universe::should_fill_in_stack_trace(throwable)) {
1225 return;
1226 }
1227
1228 PRESERVE_EXCEPTION_MARK;
1229
1230 JavaThread* thread = JavaThread::active();
1231 fill_in_stack_trace(throwable, thread);
1232 // ignore exceptions thrown during stack trace filling
1233 CLEAR_PENDING_EXCEPTION;
1234 }
1235
1236 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
1237 // Allocate stack trace - backtrace is created but not filled in
1238
1239 // No-op if stack trace is disabled
1240 if (!StackTraceInThrowable) return;
1241
1242 objArrayOop h_oop = oopFactory::new_objectArray(trace_size, CHECK);
1243 objArrayHandle backtrace (THREAD, h_oop);
1244 objArrayOop m_oop = oopFactory::new_objectArray(trace_chunk_size, CHECK);
1245 objArrayHandle methods (THREAD, m_oop);
1246 typeArrayOop b = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1247 typeArrayHandle bcis(THREAD, b);
1248
1249 // backtrace has space for one chunk (next is NULL)
1250 backtrace->obj_at_put(trace_methods_offset, methods());
1251 backtrace->obj_at_put(trace_bcis_offset, bcis());
1252 set_backtrace(throwable(), backtrace());
1253 }
1254
1255
1256 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
1257 // Fill in stack trace into preallocated backtrace (no GC)
1258
1259 // No-op if stack trace is disabled
1260 if (!StackTraceInThrowable) return;
1261
1262 assert(throwable->is_a(SystemDictionary::throwable_klass()), "sanity check");
1263
1264 oop backtrace = java_lang_Throwable::backtrace(throwable());
1265 assert(backtrace != NULL, "backtrace not preallocated");
1266
1267 oop m = objArrayOop(backtrace)->obj_at(trace_methods_offset);
1268 objArrayOop methods = objArrayOop(m);
1269 assert(methods != NULL && methods->length() > 0, "method array not preallocated");
1270
1271 oop b = objArrayOop(backtrace)->obj_at(trace_bcis_offset);
1272 typeArrayOop bcis = typeArrayOop(b);
1273 assert(bcis != NULL, "bci array not preallocated");
1274
1275 assert(methods->length() == bcis->length(), "method and bci arrays should match");
1276
1277 JavaThread* thread = JavaThread::current();
1278 ResourceMark rm(thread);
1279 vframeStream st(thread);
1280
1281 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
1282 // methods as preallocated errors aren't created by "java" code.
1283
1284 // fill in as much stack trace as possible
1285 int max_chunks = MIN2(methods->length(), (int)MaxJavaStackTraceDepth);
1286 int chunk_count = 0;
1287
1288 for (;!st.at_end(); st.next()) {
1289 // add element
1290 bcis->ushort_at_put(chunk_count, st.bci());
1291 methods->obj_at_put(chunk_count, st.method());
1292
1293 chunk_count++;
1294
1295 // Bail-out for deep stacks
1296 if (chunk_count >= max_chunks) break;
1297 }
1298 }
1299
1300
1301 int java_lang_Throwable::get_stack_trace_depth(oop throwable, TRAPS) {
1302 if (throwable == NULL) {
1303 THROW_0(vmSymbols::java_lang_NullPointerException());
1304 }
1305 objArrayOop chunk = objArrayOop(backtrace(throwable));
1306 int depth = 0;
1307 if (chunk != NULL) {
1308 // Iterate over chunks and count full ones
1309 while (true) {
1310 objArrayOop next = objArrayOop(chunk->obj_at(trace_next_offset));
1311 if (next == NULL) break;
1312 depth += trace_chunk_size;
1313 chunk = next;
1314 }
1315 assert(chunk != NULL && chunk->obj_at(trace_next_offset) == NULL, "sanity check");
1316 // Count element in remaining partial chunk
1317 objArrayOop methods = objArrayOop(chunk->obj_at(trace_methods_offset));
1318 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1319 assert(methods != NULL && bcis != NULL, "sanity check");
1320 for (int i = 0; i < methods->length(); i++) {
1321 if (methods->obj_at(i) == NULL) break;
1322 depth++;
1323 }
1324 }
1325 return depth;
1326 }
1327
1328
1329 oop java_lang_Throwable::get_stack_trace_element(oop throwable, int index, TRAPS) {
1330 if (throwable == NULL) {
1331 THROW_0(vmSymbols::java_lang_NullPointerException());
1332 }
1333 if (index < 0) {
1334 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1335 }
1336 // Compute how many chunks to skip and index into actual chunk
1337 objArrayOop chunk = objArrayOop(backtrace(throwable));
1338 int skip_chunks = index / trace_chunk_size;
1339 int chunk_index = index % trace_chunk_size;
1340 while (chunk != NULL && skip_chunks > 0) {
1341 chunk = objArrayOop(chunk->obj_at(trace_next_offset));
1342 skip_chunks--;
1343 }
1344 if (chunk == NULL) {
1345 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1346 }
1347 // Get method,bci from chunk
1348 objArrayOop methods = objArrayOop(chunk->obj_at(trace_methods_offset));
1349 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1350 assert(methods != NULL && bcis != NULL, "sanity check");
1351 methodHandle method(THREAD, methodOop(methods->obj_at(chunk_index)));
1352 int bci = bcis->ushort_at(chunk_index);
1353 // Chunk can be partial full
1354 if (method.is_null()) {
1355 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1356 }
1357
1358 oop element = java_lang_StackTraceElement::create(method, bci, CHECK_0);
1359 return element;
1360 }
1361
1362 oop java_lang_StackTraceElement::create(methodHandle method, int bci, TRAPS) {
1363 // SystemDictionary::stackTraceElement_klass() will be null for pre-1.4 JDKs
1364 assert(JDK_Version::is_gte_jdk14x_version(), "should only be called in >= 1.4");
1365
1366 // Allocate java.lang.StackTraceElement instance
1367 klassOop k = SystemDictionary::stackTraceElement_klass();
1368 assert(k != NULL, "must be loaded in 1.4+");
1369 instanceKlassHandle ik (THREAD, k);
1370 if (ik->should_be_initialized()) {
1371 ik->initialize(CHECK_0);
1372 }
1373
1374 Handle element = ik->allocate_instance_handle(CHECK_0);
1375 // Fill in class name
1376 ResourceMark rm(THREAD);
1377 const char* str = instanceKlass::cast(method->method_holder())->external_name();
1378 oop classname = StringTable::intern((char*) str, CHECK_0);
1379 java_lang_StackTraceElement::set_declaringClass(element(), classname);
1380 // Fill in method name
1381 oop methodname = StringTable::intern(method->name(), CHECK_0);
1382 java_lang_StackTraceElement::set_methodName(element(), methodname);
1383 // Fill in source file name
1384 symbolOop source = instanceKlass::cast(method->method_holder())->source_file_name();
1385 oop filename = StringTable::intern(source, CHECK_0);
1386 java_lang_StackTraceElement::set_fileName(element(), filename);
1387 // File in source line number
1388 int line_number;
1389 if (method->is_native()) {
1390 // Negative value different from -1 below, enabling Java code in
1391 // class java.lang.StackTraceElement to distinguish "native" from
1392 // "no LineNumberTable".
1393 line_number = -2;
1394 } else {
1395 // Returns -1 if no LineNumberTable, and otherwise actual line number
1396 line_number = method->line_number_from_bci(bci);
1397 }
1398 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
1399
1400 return element();
1401 }
1402
1403
1404 void java_lang_reflect_AccessibleObject::compute_offsets() {
1405 klassOop k = SystemDictionary::reflect_accessible_object_klass();
1406 compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature());
1407 }
1408
1409 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
1410 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1411 return (jboolean) reflect->bool_field(override_offset);
1412 }
1413
1414 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
1415 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1416 reflect->bool_field_put(override_offset, (int) value);
1417 }
1418
1419 void java_lang_reflect_Method::compute_offsets() {
1420 klassOop k = SystemDictionary::reflect_method_klass();
1421 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
1422 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1423 compute_offset(returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature());
1424 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
1425 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
1426 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
1427 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
1428 // The generic signature and annotations fields are only present in 1.5
1429 signature_offset = -1;
1430 annotations_offset = -1;
1431 parameter_annotations_offset = -1;
1432 annotation_default_offset = -1;
1433 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
1434 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
1435 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
1436 compute_optional_offset(annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature());
1437 }
1438
1439 Handle java_lang_reflect_Method::create(TRAPS) {
1440 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1441 klassOop klass = SystemDictionary::reflect_method_klass();
1442 // This class is eagerly initialized during VM initialization, since we keep a refence
1443 // to one of the methods
1444 assert(instanceKlass::cast(klass)->is_initialized(), "must be initialized");
1445 return instanceKlass::cast(klass)->allocate_instance_handle(CHECK_NH);
1446 }
1447
1448 oop java_lang_reflect_Method::clazz(oop reflect) {
1449 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1450 return reflect->obj_field(clazz_offset);
1451 }
1452
1453 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
1454 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1455 reflect->obj_field_put(clazz_offset, value);
1456 }
1457
1458 int java_lang_reflect_Method::slot(oop reflect) {
1459 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1460 return reflect->int_field(slot_offset);
1461 }
1462
1463 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
1464 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1465 reflect->int_field_put(slot_offset, value);
1466 }
1467
1468 oop java_lang_reflect_Method::name(oop method) {
1469 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1470 return method->obj_field(name_offset);
1471 }
1472
1473 void java_lang_reflect_Method::set_name(oop method, oop value) {
1474 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1475 method->obj_field_put(name_offset, value);
1476 }
1477
1478 oop java_lang_reflect_Method::return_type(oop method) {
1479 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1480 return method->obj_field(returnType_offset);
1481 }
1482
1483 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
1484 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1485 method->obj_field_put(returnType_offset, value);
1486 }
1487
1488 oop java_lang_reflect_Method::parameter_types(oop method) {
1489 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1490 return method->obj_field(parameterTypes_offset);
1491 }
1492
1493 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
1494 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1495 method->obj_field_put(parameterTypes_offset, value);
1496 }
1497
1498 oop java_lang_reflect_Method::exception_types(oop method) {
1499 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1500 return method->obj_field(exceptionTypes_offset);
1501 }
1502
1503 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
1504 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1505 method->obj_field_put(exceptionTypes_offset, value);
1506 }
1507
1508 int java_lang_reflect_Method::modifiers(oop method) {
1509 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1510 return method->int_field(modifiers_offset);
1511 }
1512
1513 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
1514 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1515 method->int_field_put(modifiers_offset, value);
1516 }
1517
1518 bool java_lang_reflect_Method::has_signature_field() {
1519 return (signature_offset >= 0);
1520 }
1521
1522 oop java_lang_reflect_Method::signature(oop method) {
1523 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1524 assert(has_signature_field(), "signature field must be present");
1525 return method->obj_field(signature_offset);
1526 }
1527
1528 void java_lang_reflect_Method::set_signature(oop method, oop value) {
1529 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1530 assert(has_signature_field(), "signature field must be present");
1531 method->obj_field_put(signature_offset, value);
1532 }
1533
1534 bool java_lang_reflect_Method::has_annotations_field() {
1535 return (annotations_offset >= 0);
1536 }
1537
1538 oop java_lang_reflect_Method::annotations(oop method) {
1539 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1540 assert(has_annotations_field(), "annotations field must be present");
1541 return method->obj_field(annotations_offset);
1542 }
1543
1544 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
1545 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1546 assert(has_annotations_field(), "annotations field must be present");
1547 method->obj_field_put(annotations_offset, value);
1548 }
1549
1550 bool java_lang_reflect_Method::has_parameter_annotations_field() {
1551 return (parameter_annotations_offset >= 0);
1552 }
1553
1554 oop java_lang_reflect_Method::parameter_annotations(oop method) {
1555 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1556 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
1557 return method->obj_field(parameter_annotations_offset);
1558 }
1559
1560 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
1561 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1562 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
1563 method->obj_field_put(parameter_annotations_offset, value);
1564 }
1565
1566 bool java_lang_reflect_Method::has_annotation_default_field() {
1567 return (annotation_default_offset >= 0);
1568 }
1569
1570 oop java_lang_reflect_Method::annotation_default(oop method) {
1571 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1572 assert(has_annotation_default_field(), "annotation default field must be present");
1573 return method->obj_field(annotation_default_offset);
1574 }
1575
1576 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
1577 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1578 assert(has_annotation_default_field(), "annotation default field must be present");
1579 method->obj_field_put(annotation_default_offset, value);
1580 }
1581
1582 void java_lang_reflect_Constructor::compute_offsets() {
1583 klassOop k = SystemDictionary::reflect_constructor_klass();
1584 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
1585 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
1586 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
1587 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
1588 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
1589 // The generic signature and annotations fields are only present in 1.5
1590 signature_offset = -1;
1591 annotations_offset = -1;
1592 parameter_annotations_offset = -1;
1593 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
1594 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
1595 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
1596 }
1597
1598 Handle java_lang_reflect_Constructor::create(TRAPS) {
1599 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1600 symbolHandle name = vmSymbolHandles::java_lang_reflect_Constructor();
1601 klassOop k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
1602 instanceKlassHandle klass (THREAD, k);
1603 // Ensure it is initialized
1604 klass->initialize(CHECK_NH);
1605 return klass->allocate_instance_handle(CHECK_NH);
1606 }
1607
1608 oop java_lang_reflect_Constructor::clazz(oop reflect) {
1609 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1610 return reflect->obj_field(clazz_offset);
1611 }
1612
1613 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
1614 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1615 reflect->obj_field_put(clazz_offset, value);
1616 }
1617
1618 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
1619 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1620 return constructor->obj_field(parameterTypes_offset);
1621 }
1622
1623 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
1624 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1625 constructor->obj_field_put(parameterTypes_offset, value);
1626 }
1627
1628 oop java_lang_reflect_Constructor::exception_types(oop constructor) {
1629 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1630 return constructor->obj_field(exceptionTypes_offset);
1631 }
1632
1633 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
1634 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1635 constructor->obj_field_put(exceptionTypes_offset, value);
1636 }
1637
1638 int java_lang_reflect_Constructor::slot(oop reflect) {
1639 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1640 return reflect->int_field(slot_offset);
1641 }
1642
1643 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
1644 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1645 reflect->int_field_put(slot_offset, value);
1646 }
1647
1648 int java_lang_reflect_Constructor::modifiers(oop constructor) {
1649 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1650 return constructor->int_field(modifiers_offset);
1651 }
1652
1653 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
1654 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1655 constructor->int_field_put(modifiers_offset, value);
1656 }
1657
1658 bool java_lang_reflect_Constructor::has_signature_field() {
1659 return (signature_offset >= 0);
1660 }
1661
1662 oop java_lang_reflect_Constructor::signature(oop constructor) {
1663 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1664 assert(has_signature_field(), "signature field must be present");
1665 return constructor->obj_field(signature_offset);
1666 }
1667
1668 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
1669 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1670 assert(has_signature_field(), "signature field must be present");
1671 constructor->obj_field_put(signature_offset, value);
1672 }
1673
1674 bool java_lang_reflect_Constructor::has_annotations_field() {
1675 return (annotations_offset >= 0);
1676 }
1677
1678 oop java_lang_reflect_Constructor::annotations(oop constructor) {
1679 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1680 assert(has_annotations_field(), "annotations field must be present");
1681 return constructor->obj_field(annotations_offset);
1682 }
1683
1684 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
1685 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1686 assert(has_annotations_field(), "annotations field must be present");
1687 constructor->obj_field_put(annotations_offset, value);
1688 }
1689
1690 bool java_lang_reflect_Constructor::has_parameter_annotations_field() {
1691 return (parameter_annotations_offset >= 0);
1692 }
1693
1694 oop java_lang_reflect_Constructor::parameter_annotations(oop method) {
1695 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1696 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
1697 return method->obj_field(parameter_annotations_offset);
1698 }
1699
1700 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
1701 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1702 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
1703 method->obj_field_put(parameter_annotations_offset, value);
1704 }
1705
1706 void java_lang_reflect_Field::compute_offsets() {
1707 klassOop k = SystemDictionary::reflect_field_klass();
1708 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
1709 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1710 compute_offset(type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature());
1711 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
1712 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
1713 // The generic signature and annotations fields are only present in 1.5
1714 signature_offset = -1;
1715 annotations_offset = -1;
1716 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
1717 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
1718 }
1719
1720 Handle java_lang_reflect_Field::create(TRAPS) {
1721 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1722 symbolHandle name = vmSymbolHandles::java_lang_reflect_Field();
1723 klassOop k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
1724 instanceKlassHandle klass (THREAD, k);
1725 // Ensure it is initialized
1726 klass->initialize(CHECK_NH);
1727 return klass->allocate_instance_handle(CHECK_NH);
1728 }
1729
1730 oop java_lang_reflect_Field::clazz(oop reflect) {
1731 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1732 return reflect->obj_field(clazz_offset);
1733 }
1734
1735 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
1736 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1737 reflect->obj_field_put(clazz_offset, value);
1738 }
1739
1740 oop java_lang_reflect_Field::name(oop field) {
1741 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1742 return field->obj_field(name_offset);
1743 }
1744
1745 void java_lang_reflect_Field::set_name(oop field, oop value) {
1746 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1747 field->obj_field_put(name_offset, value);
1748 }
1749
1750 oop java_lang_reflect_Field::type(oop field) {
1751 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1752 return field->obj_field(type_offset);
1753 }
1754
1755 void java_lang_reflect_Field::set_type(oop field, oop value) {
1756 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1757 field->obj_field_put(type_offset, value);
1758 }
1759
1760 int java_lang_reflect_Field::slot(oop reflect) {
1761 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1762 return reflect->int_field(slot_offset);
1763 }
1764
1765 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
1766 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1767 reflect->int_field_put(slot_offset, value);
1768 }
1769
1770 int java_lang_reflect_Field::modifiers(oop field) {
1771 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1772 return field->int_field(modifiers_offset);
1773 }
1774
1775 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
1776 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1777 field->int_field_put(modifiers_offset, value);
1778 }
1779
1780 bool java_lang_reflect_Field::has_signature_field() {
1781 return (signature_offset >= 0);
1782 }
1783
1784 oop java_lang_reflect_Field::signature(oop field) {
1785 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1786 assert(has_signature_field(), "signature field must be present");
1787 return field->obj_field(signature_offset);
1788 }
1789
1790 void java_lang_reflect_Field::set_signature(oop field, oop value) {
1791 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1792 assert(has_signature_field(), "signature field must be present");
1793 field->obj_field_put(signature_offset, value);
1794 }
1795
1796 bool java_lang_reflect_Field::has_annotations_field() {
1797 return (annotations_offset >= 0);
1798 }
1799
1800 oop java_lang_reflect_Field::annotations(oop field) {
1801 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1802 assert(has_annotations_field(), "annotations field must be present");
1803 return field->obj_field(annotations_offset);
1804 }
1805
1806 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
1807 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1808 assert(has_annotations_field(), "annotations field must be present");
1809 field->obj_field_put(annotations_offset, value);
1810 }
1811
1812
1813 void sun_reflect_ConstantPool::compute_offsets() {
1814 klassOop k = SystemDictionary::reflect_constant_pool_klass();
1815 // This null test can be removed post beta
1816 if (k != NULL) {
1817 compute_offset(_cp_oop_offset, k, vmSymbols::constantPoolOop_name(), vmSymbols::object_signature());
1818 }
1819 }
1820
1821
1822 Handle sun_reflect_ConstantPool::create(TRAPS) {
1823 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1824 klassOop k = SystemDictionary::reflect_constant_pool_klass();
1825 instanceKlassHandle klass (THREAD, k);
1826 // Ensure it is initialized
1827 klass->initialize(CHECK_NH);
1828 return klass->allocate_instance_handle(CHECK_NH);
1829 }
1830
1831
1832 oop sun_reflect_ConstantPool::cp_oop(oop reflect) {
1833 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1834 return reflect->obj_field(_cp_oop_offset);
1835 }
1836
1837
1838 void sun_reflect_ConstantPool::set_cp_oop(oop reflect, oop value) {
1839 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1840 reflect->obj_field_put(_cp_oop_offset, value);
1841 }
1842
1843 void sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
1844 klassOop k = SystemDictionary::reflect_unsafe_static_field_accessor_impl_klass();
1845 // This null test can be removed post beta
1846 if (k != NULL) {
1847 compute_offset(_base_offset, k,
1848 vmSymbols::base_name(), vmSymbols::object_signature());
1849 }
1850 }
1851
1852 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
1853 klassOop k = SystemDictionary::box_klass(type);
1854 if (k == NULL) return NULL;
1855 instanceKlassHandle h (THREAD, k);
1856 if (!h->is_initialized()) h->initialize(CHECK_0);
1857 return h->allocate_instance(THREAD);
1858 }
1859
1860
1861 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
1862 oop box = initialize_and_allocate(type, CHECK_0);
1863 if (box == NULL) return NULL;
1864 switch (type) {
1865 case T_BOOLEAN:
1866 box->bool_field_put(value_offset, value->z);
1867 break;
1868 case T_CHAR:
1869 box->char_field_put(value_offset, value->c);
1870 break;
1871 case T_FLOAT:
1872 box->float_field_put(value_offset, value->f);
1873 break;
1874 case T_DOUBLE:
1875 box->double_field_put(long_value_offset, value->d);
1876 break;
1877 case T_BYTE:
1878 box->byte_field_put(value_offset, value->b);
1879 break;
1880 case T_SHORT:
1881 box->short_field_put(value_offset, value->s);
1882 break;
1883 case T_INT:
1884 box->int_field_put(value_offset, value->i);
1885 break;
1886 case T_LONG:
1887 box->long_field_put(long_value_offset, value->j);
1888 break;
1889 default:
1890 return NULL;
1891 }
1892 return box;
1893 }
1894
1895
1896 BasicType java_lang_boxing_object::basic_type(oop box) {
1897 if (box == NULL) return T_ILLEGAL;
1898 BasicType type = SystemDictionary::box_klass_type(box->klass());
1899 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
1900 return T_ILLEGAL;
1901 return type;
1902 }
1903
1904
1905 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
1906 BasicType type = SystemDictionary::box_klass_type(box->klass());
1907 switch (type) {
1908 case T_BOOLEAN:
1909 value->z = box->bool_field(value_offset);
1910 break;
1911 case T_CHAR:
1912 value->c = box->char_field(value_offset);
1913 break;
1914 case T_FLOAT:
1915 value->f = box->float_field(value_offset);
1916 break;
1917 case T_DOUBLE:
1918 value->d = box->double_field(long_value_offset);
1919 break;
1920 case T_BYTE:
1921 value->b = box->byte_field(value_offset);
1922 break;
1923 case T_SHORT:
1924 value->s = box->short_field(value_offset);
1925 break;
1926 case T_INT:
1927 value->i = box->int_field(value_offset);
1928 break;
1929 case T_LONG:
1930 value->j = box->long_field(long_value_offset);
1931 break;
1932 default:
1933 return T_ILLEGAL;
1934 } // end switch
1935 return type;
1936 }
1937
1938
1939 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
1940 BasicType type = SystemDictionary::box_klass_type(box->klass());
1941 switch (type) {
1942 case T_BOOLEAN:
1943 box->bool_field_put(value_offset, value->z);
1944 break;
1945 case T_CHAR:
1946 box->char_field_put(value_offset, value->c);
1947 break;
1948 case T_FLOAT:
1949 box->float_field_put(value_offset, value->f);
1950 break;
1951 case T_DOUBLE:
1952 box->double_field_put(long_value_offset, value->d);
1953 break;
1954 case T_BYTE:
1955 box->byte_field_put(value_offset, value->b);
1956 break;
1957 case T_SHORT:
1958 box->short_field_put(value_offset, value->s);
1959 break;
1960 case T_INT:
1961 box->int_field_put(value_offset, value->i);
1962 break;
1963 case T_LONG:
1964 box->long_field_put(long_value_offset, value->j);
1965 break;
1966 default:
1967 return T_ILLEGAL;
1968 } // end switch
1969 return type;
1970 }
1971
1972
1973 // Support for java_lang_ref_Reference
1974 oop java_lang_ref_Reference::pending_list_lock() {
1975 instanceKlass* ik = instanceKlass::cast(SystemDictionary::reference_klass());
1976 char *addr = (((char *)ik->start_of_static_fields()) + static_lock_offset);
1977 if (UseCompressedOops) {
1978 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
1979 } else {
1980 return oopDesc::load_decode_heap_oop((oop*)addr);
1981 }
1982 }
1983
1984 HeapWord *java_lang_ref_Reference::pending_list_addr() {
1985 instanceKlass* ik = instanceKlass::cast(SystemDictionary::reference_klass());
1986 char *addr = (((char *)ik->start_of_static_fields()) + static_pending_offset);
1987 // XXX This might not be HeapWord aligned, almost rather be char *.
1988 return (HeapWord*)addr;
1989 }
1990
1991 oop java_lang_ref_Reference::pending_list() {
1992 char *addr = (char *)pending_list_addr();
1993 if (UseCompressedOops) {
1994 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
1995 } else {
1996 return oopDesc::load_decode_heap_oop((oop*)addr);
1997 }
1998 }
1999
2000
2001 // Support for java_lang_ref_SoftReference
2002
2003 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
2004 return ref->long_field(timestamp_offset);
2005 }
2006
2007 jlong java_lang_ref_SoftReference::clock() {
2008 instanceKlass* ik = instanceKlass::cast(SystemDictionary::soft_reference_klass());
2009 int offset = ik->offset_of_static_fields() + static_clock_offset;
2010
2011 return SystemDictionary::soft_reference_klass()->long_field(offset);
2012 }
2013
2014 void java_lang_ref_SoftReference::set_clock(jlong value) {
2015 instanceKlass* ik = instanceKlass::cast(SystemDictionary::soft_reference_klass());
2016 int offset = ik->offset_of_static_fields() + static_clock_offset;
2017
2018 SystemDictionary::soft_reference_klass()->long_field_put(offset, value);
2019 }
2020
2021
2022 // Support for java_security_AccessControlContext
2023
2024 int java_security_AccessControlContext::_context_offset = 0;
2025 int java_security_AccessControlContext::_privilegedContext_offset = 0;
2026 int java_security_AccessControlContext::_isPrivileged_offset = 0;
2027
2028
2029 void java_security_AccessControlContext::compute_offsets() {
2030 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
2031 fieldDescriptor fd;
2032 instanceKlass* ik = instanceKlass::cast(SystemDictionary::AccessControlContext_klass());
2033
2034 if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) {
2035 fatal("Invalid layout of java.security.AccessControlContext");
2036 }
2037 _context_offset = fd.offset();
2038
2039 if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) {
2040 fatal("Invalid layout of java.security.AccessControlContext");
2041 }
2042 _privilegedContext_offset = fd.offset();
2043
2044 if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) {
2045 fatal("Invalid layout of java.security.AccessControlContext");
2046 }
2047 _isPrivileged_offset = fd.offset();
2048 }
2049
2050
2051 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
2052 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
2053 // Ensure klass is initialized
2054 instanceKlass::cast(SystemDictionary::AccessControlContext_klass())->initialize(CHECK_0);
2055 // Allocate result
2056 oop result = instanceKlass::cast(SystemDictionary::AccessControlContext_klass())->allocate_instance(CHECK_0);
2057 // Fill in values
2058 result->obj_field_put(_context_offset, context());
2059 result->obj_field_put(_privilegedContext_offset, privileged_context());
2060 result->bool_field_put(_isPrivileged_offset, isPrivileged);
2061 return result;
2062 }
2063
2064
2065 // Support for java_lang_ClassLoader
2066
2067 oop java_lang_ClassLoader::parent(oop loader) {
2068 assert(loader->is_oop(), "loader must be oop");
2069 return loader->obj_field(parent_offset);
2070 }
2071
2072
2073 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
2074 // Fix for 4474172; see evaluation for more details
2075 loader = non_reflection_class_loader(loader);
2076
2077 oop cl = SystemDictionary::java_system_loader();
2078 while(cl != NULL) {
2079 if (cl == loader) return true;
2080 cl = parent(cl);
2081 }
2082 return false;
2083 }
2084
2085 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
2086 if (loader != NULL) {
2087 // See whether this is one of the class loaders associated with
2088 // the generated bytecodes for reflection, and if so, "magically"
2089 // delegate to its parent to prevent class loading from occurring
2090 // in places where applications using reflection didn't expect it.
2091 klassOop delegating_cl_class = SystemDictionary::reflect_delegating_classloader_klass();
2092 // This might be null in non-1.4 JDKs
2093 if (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)) {
2094 return parent(loader);
2095 }
2096 }
2097 return loader;
2098 }
2099
2100
2101 // Support for java_lang_System
2102
2103 void java_lang_System::compute_offsets() {
2104 assert(offset_of_static_fields == 0, "offsets should be initialized only once");
2105
2106 instanceKlass* ik = instanceKlass::cast(SystemDictionary::system_klass());
2107 offset_of_static_fields = ik->offset_of_static_fields();
2108 }
2109
2110 int java_lang_System::in_offset_in_bytes() {
2111 return (offset_of_static_fields + static_in_offset);
2112 }
2113
2114
2115 int java_lang_System::out_offset_in_bytes() {
2116 return (offset_of_static_fields + static_out_offset);
2117 }
2118
2119
2120 int java_lang_System::err_offset_in_bytes() {
2121 return (offset_of_static_fields + static_err_offset);
2122 }
2123
2124
2125
2126 int java_lang_String::value_offset;
2127 int java_lang_String::offset_offset;
2128 int java_lang_String::count_offset;
2129 int java_lang_String::hash_offset;
2130 int java_lang_Class::klass_offset;
2131 int java_lang_Class::array_klass_offset;
2132 int java_lang_Class::resolved_constructor_offset;
2133 int java_lang_Class::number_of_fake_oop_fields;
2134 int java_lang_Throwable::backtrace_offset;
2135 int java_lang_Throwable::detailMessage_offset;
2136 int java_lang_Throwable::cause_offset;
2137 int java_lang_Throwable::stackTrace_offset;
2138 int java_lang_reflect_AccessibleObject::override_offset;
2139 int java_lang_reflect_Method::clazz_offset;
2140 int java_lang_reflect_Method::name_offset;
2141 int java_lang_reflect_Method::returnType_offset;
2142 int java_lang_reflect_Method::parameterTypes_offset;
2143 int java_lang_reflect_Method::exceptionTypes_offset;
2144 int java_lang_reflect_Method::slot_offset;
2145 int java_lang_reflect_Method::modifiers_offset;
2146 int java_lang_reflect_Method::signature_offset;
2147 int java_lang_reflect_Method::annotations_offset;
2148 int java_lang_reflect_Method::parameter_annotations_offset;
2149 int java_lang_reflect_Method::annotation_default_offset;
2150 int java_lang_reflect_Constructor::clazz_offset;
2151 int java_lang_reflect_Constructor::parameterTypes_offset;
2152 int java_lang_reflect_Constructor::exceptionTypes_offset;
2153 int java_lang_reflect_Constructor::slot_offset;
2154 int java_lang_reflect_Constructor::modifiers_offset;
2155 int java_lang_reflect_Constructor::signature_offset;
2156 int java_lang_reflect_Constructor::annotations_offset;
2157 int java_lang_reflect_Constructor::parameter_annotations_offset;
2158 int java_lang_reflect_Field::clazz_offset;
2159 int java_lang_reflect_Field::name_offset;
2160 int java_lang_reflect_Field::type_offset;
2161 int java_lang_reflect_Field::slot_offset;
2162 int java_lang_reflect_Field::modifiers_offset;
2163 int java_lang_reflect_Field::signature_offset;
2164 int java_lang_reflect_Field::annotations_offset;
2165 int java_lang_boxing_object::value_offset;
2166 int java_lang_boxing_object::long_value_offset;
2167 int java_lang_ref_Reference::referent_offset;
2168 int java_lang_ref_Reference::queue_offset;
2169 int java_lang_ref_Reference::next_offset;
2170 int java_lang_ref_Reference::discovered_offset;
2171 int java_lang_ref_Reference::static_lock_offset;
2172 int java_lang_ref_Reference::static_pending_offset;
2173 int java_lang_ref_Reference::number_of_fake_oop_fields;
2174 int java_lang_ref_SoftReference::timestamp_offset;
2175 int java_lang_ref_SoftReference::static_clock_offset;
2176 int java_lang_ClassLoader::parent_offset;
2177 int java_lang_System::offset_of_static_fields;
2178 int java_lang_System::static_in_offset;
2179 int java_lang_System::static_out_offset;
2180 int java_lang_System::static_err_offset;
2181 int java_lang_StackTraceElement::declaringClass_offset;
2182 int java_lang_StackTraceElement::methodName_offset;
2183 int java_lang_StackTraceElement::fileName_offset;
2184 int java_lang_StackTraceElement::lineNumber_offset;
2185 int java_lang_AssertionStatusDirectives::classes_offset;
2186 int java_lang_AssertionStatusDirectives::classEnabled_offset;
2187 int java_lang_AssertionStatusDirectives::packages_offset;
2188 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
2189 int java_lang_AssertionStatusDirectives::deflt_offset;
2190 int java_nio_Buffer::_limit_offset;
2191 int sun_misc_AtomicLongCSImpl::_value_offset;
2192 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0;
2193 int sun_reflect_ConstantPool::_cp_oop_offset;
2194 int sun_reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
2195
2196
2197 // Support for java_lang_StackTraceElement
2198
2199 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
2200 element->obj_field_put(fileName_offset, value);
2201 }
2202
2203 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
2204 element->obj_field_put(declaringClass_offset, value);
2205 }
2206
2207 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
2208 element->obj_field_put(methodName_offset, value);
2209 }
2210
2211 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
2212 element->int_field_put(lineNumber_offset, value);
2213 }
2214
2215
2216 // Support for java Assertions - java_lang_AssertionStatusDirectives.
2217
2218 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
2219 o->obj_field_put(classes_offset, val);
2220 }
2221
2222 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
2223 o->obj_field_put(classEnabled_offset, val);
2224 }
2225
2226 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
2227 o->obj_field_put(packages_offset, val);
2228 }
2229
2230 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
2231 o->obj_field_put(packageEnabled_offset, val);
2232 }
2233
2234 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
2235 o->bool_field_put(deflt_offset, val);
2236 }
2237
2238
2239 // Support for intrinsification of java.nio.Buffer.checkIndex
2240 int java_nio_Buffer::limit_offset() {
2241 return _limit_offset;
2242 }
2243
2244
2245 void java_nio_Buffer::compute_offsets() {
2246 klassOop k = SystemDictionary::java_nio_Buffer_klass();
2247 assert(k != NULL, "must be loaded in 1.4+");
2248 compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature());
2249 }
2250
2251 // Support for intrinsification of sun.misc.AtomicLongCSImpl.attemptUpdate
2252 int sun_misc_AtomicLongCSImpl::value_offset() {
2253 assert(SystemDictionary::sun_misc_AtomicLongCSImpl_klass() != NULL, "can't call this");
2254 return _value_offset;
2255 }
2256
2257
2258 void sun_misc_AtomicLongCSImpl::compute_offsets() {
2259 klassOop k = SystemDictionary::sun_misc_AtomicLongCSImpl_klass();
2260 // If this class is not present, its value field offset won't be referenced.
2261 if (k != NULL) {
2262 compute_offset(_value_offset, k, vmSymbols::value_name(), vmSymbols::long_signature());
2263 }
2264 }
2265
2266 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) {
2267 if (_owner_offset != 0) return;
2268
2269 assert(JDK_Version::is_gte_jdk16x_version(), "Must be JDK 1.6 or later");
2270 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK);
2271 klassOop k = SystemDictionary::abstract_ownable_synchronizer_klass();
2272 compute_offset(_owner_offset, k,
2273 vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature());
2274 }
2275
2276 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
2277 assert(_owner_offset != 0, "Must be initialized");
2278 return obj->obj_field(_owner_offset);
2279 }
2280
2281 // Compute hard-coded offsets
2282 // Invoked before SystemDictionary::initialize, so pre-loaded classes
2283 // are not available to determine the offset_of_static_fields.
2284 void JavaClasses::compute_hard_coded_offsets() {
2285 const int x = heapOopSize;
2286 const int header = instanceOopDesc::base_offset_in_bytes();
2287
2288 // Do the String Class
2289 java_lang_String::value_offset = java_lang_String::hc_value_offset * x + header;
2290 java_lang_String::offset_offset = java_lang_String::hc_offset_offset * x + header;
2291 java_lang_String::count_offset = java_lang_String::offset_offset + sizeof (jint);
2292 java_lang_String::hash_offset = java_lang_String::count_offset + sizeof (jint);
2293
2294 // Do the Class Class
2295 java_lang_Class::klass_offset = java_lang_Class::hc_klass_offset * x + header;
2296 java_lang_Class::array_klass_offset = java_lang_Class::hc_array_klass_offset * x + header;
2297 java_lang_Class::resolved_constructor_offset = java_lang_Class::hc_resolved_constructor_offset * x + header;
2298
2299 // This is NOT an offset
2300 java_lang_Class::number_of_fake_oop_fields = java_lang_Class::hc_number_of_fake_oop_fields;
2301
2302 // Throwable Class
2303 java_lang_Throwable::backtrace_offset = java_lang_Throwable::hc_backtrace_offset * x + header;
2304 java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header;
2305 java_lang_Throwable::cause_offset = java_lang_Throwable::hc_cause_offset * x + header;
2306 java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header;
2307
2308 // java_lang_boxing_object
2309 java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header;
2310 java_lang_boxing_object::long_value_offset = align_size_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong);
2311
2312 // java_lang_ref_Reference:
2313 java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header;
2314 java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header;
2315 java_lang_ref_Reference::next_offset = java_lang_ref_Reference::hc_next_offset * x + header;
2316 java_lang_ref_Reference::discovered_offset = java_lang_ref_Reference::hc_discovered_offset * x + header;
2317 java_lang_ref_Reference::static_lock_offset = java_lang_ref_Reference::hc_static_lock_offset * x;
2318 java_lang_ref_Reference::static_pending_offset = java_lang_ref_Reference::hc_static_pending_offset * x;
2319 // Artificial fields for java_lang_ref_Reference
2320 // The first field is for the discovered field added in 1.4
2321 java_lang_ref_Reference::number_of_fake_oop_fields = 1;
2322
2323 // java_lang_ref_SoftReference Class
2324 java_lang_ref_SoftReference::timestamp_offset = align_size_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong);
2325 // Don't multiply static fields because they are always in wordSize units
2326 java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x;
2327
2328 // java_lang_ClassLoader
2329 java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header;
2330
2331 // java_lang_System
2332 java_lang_System::static_in_offset = java_lang_System::hc_static_in_offset * x;
2333 java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x;
2334 java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x;
2335
2336 // java_lang_StackTraceElement
2337 java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset * x + header;
2338 java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header;
2339 java_lang_StackTraceElement::fileName_offset = java_lang_StackTraceElement::hc_fileName_offset * x + header;
2340 java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header;
2341 java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header;
2342 java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header;
2343 java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header;
2344 java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header;
2345 java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header;
2346
2347 }
2348
2349
2350 // Compute non-hard-coded field offsets of all the classes in this file
2351 void JavaClasses::compute_offsets() {
2352
2353 java_lang_Class::compute_offsets();
2354 java_lang_System::compute_offsets();
2355 java_lang_Thread::compute_offsets();
2356 java_lang_ThreadGroup::compute_offsets();
2357 java_security_AccessControlContext::compute_offsets();
2358 // Initialize reflection classes. The layouts of these classes
2359 // changed with the new reflection implementation in JDK 1.4, and
2360 // since the Universe doesn't know what JDK version it is until this
2361 // point we defer computation of these offsets until now.
2362 java_lang_reflect_AccessibleObject::compute_offsets();
2363 java_lang_reflect_Method::compute_offsets();
2364 java_lang_reflect_Constructor::compute_offsets();
2365 java_lang_reflect_Field::compute_offsets();
2366 if (JDK_Version::is_gte_jdk14x_version()) {
2367 java_nio_Buffer::compute_offsets();
2368 }
2369 if (JDK_Version::is_gte_jdk15x_version()) {
2370 sun_reflect_ConstantPool::compute_offsets();
2371 sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets();
2372 }
2373 sun_misc_AtomicLongCSImpl::compute_offsets();
2374 }
2375
2376 #ifndef PRODUCT
2377
2378 // These functions exist to assert the validity of hard-coded field offsets to guard
2379 // against changes in the class files
2380
2381 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
2382 EXCEPTION_MARK;
2383 fieldDescriptor fd;
2384 symbolHandle klass_sym = oopFactory::new_symbol_handle(klass_name, CATCH);
2385 klassOop k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
2386 instanceKlassHandle h_klass (THREAD, k);
2387 //instanceKlassHandle h_klass(klass);
2388 symbolHandle f_name = oopFactory::new_symbol_handle(field_name, CATCH);
2389 symbolHandle f_sig = oopFactory::new_symbol_handle(field_sig, CATCH);
2390 if (!h_klass->find_local_field(f_name(), f_sig(), &fd)) {
2391 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
2392 return false;
2393 }
2394 if (fd.is_static()) {
2395 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
2396 return false;
2397 }
2398 if (fd.offset() == hardcoded_offset ) {
2399 return true;
2400 } else {
2401 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
2402 klass_name, field_name, hardcoded_offset, fd.offset());
2403 return false;
2404 }
2405 }
2406
2407
2408 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
2409 EXCEPTION_MARK;
2410 fieldDescriptor fd;
2411 symbolHandle klass_sym = oopFactory::new_symbol_handle(klass_name, CATCH);
2412 klassOop k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
2413 instanceKlassHandle h_klass (THREAD, k);
2414 symbolHandle f_name = oopFactory::new_symbol_handle(field_name, CATCH);
2415 symbolHandle f_sig = oopFactory::new_symbol_handle(field_sig, CATCH);
2416 if (!h_klass->find_local_field(f_name(), f_sig(), &fd)) {
2417 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
2418 return false;
2419 }
2420 if (!fd.is_static()) {
2421 tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name);
2422 return false;
2423 }
2424 if (fd.offset() == hardcoded_offset + h_klass->offset_of_static_fields()) {
2425 return true;
2426 } else {
2427 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());
2428 return false;
2429 }
2430 }
2431
2432
2433 bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) {
2434 EXCEPTION_MARK;
2435 fieldDescriptor fd;
2436 symbolHandle klass_sym = oopFactory::new_symbol_handle(klass_name, CATCH);
2437 klassOop k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
2438 instanceKlassHandle h_klass (THREAD, k);
2439 symbolHandle f_name = oopFactory::new_symbol_handle(field_name, CATCH);
2440 symbolHandle f_sig = oopFactory::new_symbol_handle(field_sig, CATCH);
2441 if (!h_klass->find_local_field(f_name(), f_sig(), &fd)) {
2442 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
2443 return false;
2444 }
2445 if (!fd.is_static() || !fd.has_initial_value()) {
2446 tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name);
2447 return false;
2448 }
2449 if (!fd.initial_value_tag().is_int()) {
2450 tty->print_cr("Static field %s.%s is not an int", klass_name, field_name);
2451 return false;
2452 }
2453 jint field_value = fd.int_initial_value();
2454 if (field_value == hardcoded_constant) {
2455 return true;
2456 } else {
2457 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);
2458 return false;
2459 }
2460 }
2461
2462
2463 // Check the hard-coded field offsets of all the classes in this file
2464
2465 void JavaClasses::check_offsets() {
2466 bool valid = true;
2467
2468 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
2469 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
2470
2471 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
2472 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
2473
2474 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
2475 valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig)
2476
2477 #define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \
2478 valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig)
2479
2480 // java.lang.String
2481
2482 CHECK_OFFSET("java/lang/String", java_lang_String, value, "[C");
2483 CHECK_OFFSET("java/lang/String", java_lang_String, offset, "I");
2484 CHECK_OFFSET("java/lang/String", java_lang_String, count, "I");
2485 CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I");
2486
2487 // java.lang.Class
2488
2489 // Fake fields
2490 // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked
2491 // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked
2492 // CHECK_OFFSET("java/lang/Class", java_lang_Class, resolved_constructor); // %%% this needs to be checked
2493
2494 // java.lang.Throwable
2495
2496 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;");
2497 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;");
2498 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, cause, "Ljava/lang/Throwable;");
2499 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;");
2500
2501 // Boxed primitive objects (java_lang_boxing_object)
2502
2503 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
2504 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
2505 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
2506 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
2507 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
2508 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
2509 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
2510 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
2511
2512 // java.lang.ClassLoader
2513
2514 CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent, "Ljava/lang/ClassLoader;");
2515
2516 // java.lang.System
2517
2518 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, in, "Ljava/io/InputStream;");
2519 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;");
2520 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;");
2521
2522 // java.lang.StackTraceElement
2523
2524 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;");
2525 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;");
2526 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, fileName, "Ljava/lang/String;");
2527 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I");
2528
2529 // java.lang.ref.Reference
2530
2531 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
2532 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
2533 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
2534 // Fake field
2535 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
2536 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, lock, "Ljava/lang/ref/Reference$Lock;");
2537 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, pending, "Ljava/lang/ref/Reference;");
2538
2539 // java.lang.ref.SoftReference
2540
2541 CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J");
2542 CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J");
2543
2544 // java.lang.AssertionStatusDirectives
2545 //
2546 // The CheckAssertionStatusDirectives boolean can be removed from here and
2547 // globals.hpp after the AssertionStatusDirectives class has been integrated
2548 // into merlin "for some time." Without it, the vm will fail with early
2549 // merlin builds.
2550
2551 if (CheckAssertionStatusDirectives && JDK_Version::is_gte_jdk14x_version()) {
2552 const char* nm = "java/lang/AssertionStatusDirectives";
2553 const char* sig = "[Ljava/lang/String;";
2554 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig);
2555 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z");
2556 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig);
2557 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z");
2558 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z");
2559 }
2560
2561 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
2562 }
2563
2564 #endif // PRODUCT
2565
2566 void javaClasses_init() {
2567 JavaClasses::compute_offsets();
2568 JavaClasses::check_offsets();
2569 FilteredFieldsMap::initialize(); // must be done after computing offsets.
2570 }