Wed, 09 Apr 2008 15:10:22 -0700
Merge
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 */
25 # include "incls/_precompiled.incl"
26 # include "incls/_javaClasses.cpp.incl"
28 // Helpful macro for computing field offsets at run time rather than hardcoding them
29 #define COMPUTE_OFFSET(klass_name_as_C_str, dest_offset, klass_oop, name_symbol, signature_symbol) \
30 { \
31 fieldDescriptor fd; \
32 instanceKlass* ik = instanceKlass::cast(klass_oop); \
33 if (!ik->find_local_field(name_symbol, signature_symbol, &fd)) { \
34 fatal("Invalid layout of " klass_name_as_C_str); \
35 } \
36 dest_offset = fd.offset(); \
37 }
39 // Same as above but for "optional" offsets that might not be present in certain JDK versions
40 #define COMPUTE_OPTIONAL_OFFSET(klass_name_as_C_str, dest_offset, klass_oop, name_symbol, signature_symbol) \
41 { \
42 fieldDescriptor fd; \
43 instanceKlass* ik = instanceKlass::cast(klass_oop); \
44 if (ik->find_local_field(name_symbol, signature_symbol, &fd)) { \
45 dest_offset = fd.offset(); \
46 } \
47 }
49 Handle java_lang_String::basic_create(int length, bool tenured, TRAPS) {
50 // Create the String object first, so there's a chance that the String
51 // and the char array it points to end up in the same cache line.
52 oop obj;
53 if (tenured) {
54 obj = instanceKlass::cast(SystemDictionary::string_klass())->allocate_permanent_instance(CHECK_NH);
55 } else {
56 obj = instanceKlass::cast(SystemDictionary::string_klass())->allocate_instance(CHECK_NH);
57 }
59 // Create the char array. The String object must be handlized here
60 // because GC can happen as a result of the allocation attempt.
61 Handle h_obj(THREAD, obj);
62 typeArrayOop buffer;
63 if (tenured) {
64 buffer = oopFactory::new_permanent_charArray(length, CHECK_NH);
65 } else {
66 buffer = oopFactory::new_charArray(length, CHECK_NH);
67 }
69 // Point the String at the char array
70 obj = h_obj();
71 set_value(obj, buffer);
72 // No need to zero the offset, allocation zero'ed the entire String object
73 assert(offset(obj) == 0, "initial String offset should be zero");
74 //set_offset(obj, 0);
75 set_count(obj, length);
77 return h_obj;
78 }
80 Handle java_lang_String::basic_create_from_unicode(jchar* unicode, int length, bool tenured, TRAPS) {
81 Handle h_obj = basic_create(length, tenured, CHECK_NH);
82 typeArrayOop buffer = value(h_obj());
83 for (int index = 0; index < length; index++) {
84 buffer->char_at_put(index, unicode[index]);
85 }
86 return h_obj;
87 }
89 Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) {
90 return basic_create_from_unicode(unicode, length, false, CHECK_NH);
91 }
93 Handle java_lang_String::create_tenured_from_unicode(jchar* unicode, int length, TRAPS) {
94 return basic_create_from_unicode(unicode, length, true, CHECK_NH);
95 }
97 oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) {
98 Handle h_obj = basic_create_from_unicode(unicode, length, false, CHECK_0);
99 return h_obj();
100 }
102 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
103 if (utf8_str == NULL) {
104 return Handle();
105 }
106 int length = UTF8::unicode_length(utf8_str);
107 Handle h_obj = basic_create(length, false, CHECK_NH);
108 if (length > 0) {
109 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
110 }
111 return h_obj;
112 }
114 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
115 Handle h_obj = create_from_str(utf8_str, CHECK_0);
116 return h_obj();
117 }
119 Handle java_lang_String::create_from_symbol(symbolHandle symbol, TRAPS) {
120 int length = UTF8::unicode_length((char*)symbol->bytes(), symbol->utf8_length());
121 Handle h_obj = basic_create(length, false, CHECK_NH);
122 if (length > 0) {
123 UTF8::convert_to_unicode((char*)symbol->bytes(), value(h_obj())->char_at_addr(0), length);
124 }
125 return h_obj;
126 }
128 // Converts a C string to a Java String based on current encoding
129 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
130 assert(str != NULL, "bad arguments");
132 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *);
133 static to_java_string_fn_t _to_java_string_fn = NULL;
135 if (_to_java_string_fn == NULL) {
136 void *lib_handle = os::native_java_library();
137 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, hpi::dll_lookup(lib_handle, "NewStringPlatform"));
138 if (_to_java_string_fn == NULL) {
139 fatal("NewStringPlatform missing");
140 }
141 }
143 jstring js = NULL;
144 { JavaThread* thread = (JavaThread*)THREAD;
145 assert(thread->is_Java_thread(), "must be java thread");
146 HandleMark hm(thread);
147 ThreadToNativeFromVM ttn(thread);
148 js = (_to_java_string_fn)(thread->jni_environment(), str);
149 }
150 return Handle(THREAD, JNIHandles::resolve(js));
151 }
153 // Converts a Java String to a native C string that can be used for
154 // native OS calls.
155 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
157 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
158 static to_platform_string_fn_t _to_platform_string_fn = NULL;
160 if (_to_platform_string_fn == NULL) {
161 void *lib_handle = os::native_java_library();
162 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, hpi::dll_lookup(lib_handle, "GetStringPlatformChars"));
163 if (_to_platform_string_fn == NULL) {
164 fatal("GetStringPlatformChars missing");
165 }
166 }
168 char *native_platform_string;
169 { JavaThread* thread = (JavaThread*)THREAD;
170 assert(thread->is_Java_thread(), "must be java thread");
171 JNIEnv *env = thread->jni_environment();
172 jstring js = (jstring) JNIHandles::make_local(env, java_string());
173 bool is_copy;
174 HandleMark hm(thread);
175 ThreadToNativeFromVM ttn(thread);
176 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
177 assert(is_copy == JNI_TRUE, "is_copy value changed");
178 JNIHandles::destroy_local(js);
179 }
180 return native_platform_string;
181 }
183 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) {
184 oop obj = java_string();
185 // Typical usage is to convert all '/' to '.' in string.
186 typeArrayOop value = java_lang_String::value(obj);
187 int offset = java_lang_String::offset(obj);
188 int length = java_lang_String::length(obj);
190 // First check if any from_char exist
191 int index; // Declared outside, used later
192 for (index = 0; index < length; index++) {
193 if (value->char_at(index + offset) == from_char) {
194 break;
195 }
196 }
197 if (index == length) {
198 // No from_char, so do not copy.
199 return java_string;
200 }
202 // Create new UNICODE buffer. Must handlize value because GC
203 // may happen during String and char array creation.
204 typeArrayHandle h_value(THREAD, value);
205 Handle string = basic_create(length, false, CHECK_NH);
207 typeArrayOop from_buffer = h_value();
208 typeArrayOop to_buffer = java_lang_String::value(string());
210 // Copy contents
211 for (index = 0; index < length; index++) {
212 jchar c = from_buffer->char_at(index + offset);
213 if (c == from_char) {
214 c = to_char;
215 }
216 to_buffer->char_at_put(index, c);
217 }
218 return string;
219 }
221 jchar* java_lang_String::as_unicode_string(oop java_string, int& length) {
222 typeArrayOop value = java_lang_String::value(java_string);
223 int offset = java_lang_String::offset(java_string);
224 length = java_lang_String::length(java_string);
226 jchar* result = NEW_RESOURCE_ARRAY(jchar, length);
227 for (int index = 0; index < length; index++) {
228 result[index] = value->char_at(index + offset);
229 }
230 return result;
231 }
233 symbolHandle java_lang_String::as_symbol(Handle java_string, TRAPS) {
234 oop obj = java_string();
235 typeArrayOop value = java_lang_String::value(obj);
236 int offset = java_lang_String::offset(obj);
237 int length = java_lang_String::length(obj);
239 ResourceMark rm(THREAD);
240 symbolHandle result;
242 if (length > 0) {
243 int utf8_length = UNICODE::utf8_length(value->char_at_addr(offset), length);
244 char* chars = NEW_RESOURCE_ARRAY(char, utf8_length + 1);
245 UNICODE::convert_to_utf8(value->char_at_addr(offset), length, chars);
246 // Allocate the symbol
247 result = oopFactory::new_symbol_handle(chars, utf8_length, CHECK_(symbolHandle()));
248 } else {
249 result = oopFactory::new_symbol_handle("", 0, CHECK_(symbolHandle()));
250 }
251 return result;
252 }
254 int java_lang_String::utf8_length(oop java_string) {
255 typeArrayOop value = java_lang_String::value(java_string);
256 int offset = java_lang_String::offset(java_string);
257 int length = java_lang_String::length(java_string);
258 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
259 return UNICODE::utf8_length(position, length);
260 }
262 char* java_lang_String::as_utf8_string(oop java_string) {
263 typeArrayOop value = java_lang_String::value(java_string);
264 int offset = java_lang_String::offset(java_string);
265 int length = java_lang_String::length(java_string);
266 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
267 return UNICODE::as_utf8(position, length);
268 }
270 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
271 typeArrayOop value = java_lang_String::value(java_string);
272 int offset = java_lang_String::offset(java_string);
273 int length = java_lang_String::length(java_string);
274 assert(start + len <= length, "just checking");
275 jchar* position = value->char_at_addr(offset + start);
276 return UNICODE::as_utf8(position, len);
277 }
279 bool java_lang_String::equals(oop java_string, jchar* chars, int len) {
280 assert(SharedSkipVerify ||
281 java_string->klass() == SystemDictionary::string_klass(),
282 "must be java_string");
283 typeArrayOop value = java_lang_String::value(java_string);
284 int offset = java_lang_String::offset(java_string);
285 int length = java_lang_String::length(java_string);
286 if (length != len) {
287 return false;
288 }
289 for (int i = 0; i < len; i++) {
290 if (value->char_at(i + offset) != chars[i]) {
291 return false;
292 }
293 }
294 return true;
295 }
297 void java_lang_String::print(Handle java_string, outputStream* st) {
298 oop obj = java_string();
299 assert(obj->klass() == SystemDictionary::string_klass(), "must be java_string");
300 typeArrayOop value = java_lang_String::value(obj);
301 int offset = java_lang_String::offset(obj);
302 int length = java_lang_String::length(obj);
304 int end = MIN2(length, 100);
305 if (value == NULL) {
306 // This can happen if, e.g., printing a String
307 // object before its initializer has been called
308 st->print_cr("NULL");
309 } else {
310 st->print("\"");
311 for (int index = 0; index < length; index++) {
312 st->print("%c", value->char_at(index + offset));
313 }
314 st->print("\"");
315 }
316 }
319 oop java_lang_Class::create_mirror(KlassHandle k, TRAPS) {
320 assert(k->java_mirror() == NULL, "should only assign mirror once");
321 // Use this moment of initialization to cache modifier_flags also,
322 // to support Class.getModifiers(). Instance classes recalculate
323 // the cached flags after the class file is parsed, but before the
324 // class is put into the system dictionary.
325 int computed_modifiers = k->compute_modifier_flags(CHECK_0);
326 k->set_modifier_flags(computed_modifiers);
327 if (SystemDictionary::class_klass_loaded()) {
328 // Allocate mirror (java.lang.Class instance)
329 Handle mirror = instanceKlass::cast(SystemDictionary::class_klass())->allocate_permanent_instance(CHECK_0);
330 // Setup indirections
331 mirror->obj_field_put(klass_offset, k());
332 k->set_java_mirror(mirror());
333 // It might also have a component mirror. This mirror must already exist.
334 if (k->oop_is_javaArray()) {
335 Handle comp_mirror;
336 if (k->oop_is_typeArray()) {
337 BasicType type = typeArrayKlass::cast(k->as_klassOop())->element_type();
338 comp_mirror = Universe::java_mirror(type);
339 assert(comp_mirror.not_null(), "must have primitive mirror");
340 } else if (k->oop_is_objArray()) {
341 klassOop element_klass = objArrayKlass::cast(k->as_klassOop())->element_klass();
342 if (element_klass != NULL
343 && (Klass::cast(element_klass)->oop_is_instance() ||
344 Klass::cast(element_klass)->oop_is_javaArray())) {
345 comp_mirror = Klass::cast(element_klass)->java_mirror();
346 assert(comp_mirror.not_null(), "must have element mirror");
347 }
348 // else some object array internal to the VM, like systemObjArrayKlassObj
349 }
350 if (comp_mirror.not_null()) {
351 // Two-way link between the array klass and its component mirror:
352 arrayKlass::cast(k->as_klassOop())->set_component_mirror(comp_mirror());
353 set_array_klass(comp_mirror(), k->as_klassOop());
354 }
355 }
356 return mirror();
357 } else {
358 return NULL;
359 }
360 }
363 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
364 // This should be improved by adding a field at the Java level or by
365 // introducing a new VM klass (see comment in ClassFileParser)
366 oop java_class = instanceKlass::cast(SystemDictionary::class_klass())->allocate_permanent_instance(CHECK_0);
367 if (type != T_VOID) {
368 klassOop aklass = Universe::typeArrayKlassObj(type);
369 assert(aklass != NULL, "correct bootstrap");
370 set_array_klass(java_class, aklass);
371 }
372 return java_class;
373 }
376 klassOop java_lang_Class::as_klassOop(oop java_class) {
377 //%note memory_2
378 klassOop k = klassOop(java_class->obj_field(klass_offset));
379 assert(k == NULL || k->is_klass(), "type check");
380 return k;
381 }
384 klassOop java_lang_Class::array_klass(oop java_class) {
385 klassOop k = klassOop(java_class->obj_field(array_klass_offset));
386 assert(k == NULL || k->is_klass() && Klass::cast(k)->oop_is_javaArray(), "should be array klass");
387 return k;
388 }
391 void java_lang_Class::set_array_klass(oop java_class, klassOop klass) {
392 assert(klass->is_klass() && Klass::cast(klass)->oop_is_javaArray(), "should be array klass");
393 java_class->obj_field_put(array_klass_offset, klass);
394 }
397 methodOop java_lang_Class::resolved_constructor(oop java_class) {
398 oop constructor = java_class->obj_field(resolved_constructor_offset);
399 assert(constructor == NULL || constructor->is_method(), "should be method");
400 return methodOop(constructor);
401 }
404 void java_lang_Class::set_resolved_constructor(oop java_class, methodOop constructor) {
405 assert(constructor->is_method(), "should be method");
406 java_class->obj_field_put(resolved_constructor_offset, constructor);
407 }
410 bool java_lang_Class::is_primitive(oop java_class) {
411 klassOop k = klassOop(java_class->obj_field(klass_offset));
412 return k == NULL;
413 }
416 BasicType java_lang_Class::primitive_type(oop java_class) {
417 assert(java_lang_Class::is_primitive(java_class), "just checking");
418 klassOop ak = klassOop(java_class->obj_field(array_klass_offset));
419 BasicType type = T_VOID;
420 if (ak != NULL) {
421 // Note: create_basic_type_mirror above initializes ak to a non-null value.
422 type = arrayKlass::cast(ak)->element_type();
423 } else {
424 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
425 }
426 assert(Universe::java_mirror(type) == java_class, "must be consistent");
427 return type;
428 }
431 oop java_lang_Class::primitive_mirror(BasicType t) {
432 oop mirror = Universe::java_mirror(t);
433 assert(mirror != NULL && mirror->is_a(SystemDictionary::class_klass()), "must be a Class");
434 assert(java_lang_Class::is_primitive(mirror), "must be primitive");
435 return mirror;
436 }
438 bool java_lang_Class::offsets_computed = false;
439 int java_lang_Class::classRedefinedCount_offset = -1;
441 void java_lang_Class::compute_offsets() {
442 assert(!offsets_computed, "offsets should be initialized only once");
443 offsets_computed = true;
445 klassOop k = SystemDictionary::class_klass();
446 // The classRedefinedCount field is only present starting in 1.5,
447 // so don't go fatal.
448 COMPUTE_OPTIONAL_OFFSET("java.lang.Class", classRedefinedCount_offset,
449 k, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature());
450 }
452 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
453 if (!JDK_Version::is_gte_jdk15x_version()
454 || classRedefinedCount_offset == -1) {
455 // The classRedefinedCount field is only present starting in 1.5.
456 // If we don't have an offset for it then just return -1 as a marker.
457 return -1;
458 }
460 return the_class_mirror->int_field(classRedefinedCount_offset);
461 }
463 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
464 if (!JDK_Version::is_gte_jdk15x_version()
465 || classRedefinedCount_offset == -1) {
466 // The classRedefinedCount field is only present starting in 1.5.
467 // If we don't have an offset for it then nothing to set.
468 return;
469 }
471 the_class_mirror->int_field_put(classRedefinedCount_offset, value);
472 }
475 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
476 // platform thread structure, and a eetop offset which was used for thread
477 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
478 // merged, so in the HotSpot VM we just use the eetop field for the thread
479 // instead of the privateInfo_offset.
480 //
481 // Note: The stackSize field is only present starting in 1.4.
483 int java_lang_Thread::_name_offset = 0;
484 int java_lang_Thread::_group_offset = 0;
485 int java_lang_Thread::_contextClassLoader_offset = 0;
486 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
487 int java_lang_Thread::_priority_offset = 0;
488 int java_lang_Thread::_eetop_offset = 0;
489 int java_lang_Thread::_daemon_offset = 0;
490 int java_lang_Thread::_stillborn_offset = 0;
491 int java_lang_Thread::_stackSize_offset = 0;
492 int java_lang_Thread::_tid_offset = 0;
493 int java_lang_Thread::_thread_status_offset = 0;
494 int java_lang_Thread::_park_blocker_offset = 0;
495 int java_lang_Thread::_park_event_offset = 0 ;
498 void java_lang_Thread::compute_offsets() {
499 assert(_group_offset == 0, "offsets should be initialized only once");
501 klassOop k = SystemDictionary::thread_klass();
502 COMPUTE_OFFSET("java.lang.Thread", _name_offset, k, vmSymbols::name_name(), vmSymbols::char_array_signature());
503 COMPUTE_OFFSET("java.lang.Thread", _group_offset, k, vmSymbols::group_name(), vmSymbols::threadgroup_signature());
504 COMPUTE_OFFSET("java.lang.Thread", _contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature());
505 COMPUTE_OFFSET("java.lang.Thread", _inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature());
506 COMPUTE_OFFSET("java.lang.Thread", _priority_offset, k, vmSymbols::priority_name(), vmSymbols::int_signature());
507 COMPUTE_OFFSET("java.lang.Thread", _daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
508 COMPUTE_OFFSET("java.lang.Thread", _eetop_offset, k, vmSymbols::eetop_name(), vmSymbols::long_signature());
509 COMPUTE_OFFSET("java.lang.Thread", _stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature());
510 // The stackSize field is only present starting in 1.4, so don't go fatal.
511 COMPUTE_OPTIONAL_OFFSET("java.lang.Thread", _stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature());
512 // The tid and thread_status fields are only present starting in 1.5, so don't go fatal.
513 COMPUTE_OPTIONAL_OFFSET("java.lang.Thread", _tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature());
514 COMPUTE_OPTIONAL_OFFSET("java.lang.Thread", _thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature());
515 // The parkBlocker field is only present starting in 1.6, so don't go fatal.
516 COMPUTE_OPTIONAL_OFFSET("java.lang.Thread", _park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature());
517 COMPUTE_OPTIONAL_OFFSET("java.lang.Thread", _park_event_offset, k, vmSymbols::park_event_name(),
518 vmSymbols::long_signature());
519 }
522 JavaThread* java_lang_Thread::thread(oop java_thread) {
523 return (JavaThread*) java_thread->obj_field(_eetop_offset);
524 }
527 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
528 // We are storing a JavaThread* (malloc'ed data) into a long field in the thread
529 // object. The store has to be 64-bit wide so we use a pointer store, but we
530 // cannot call oopDesc::obj_field_put since it includes a write barrier!
531 oop* addr = java_thread->obj_field_addr(_eetop_offset);
532 *addr = (oop) thread;
533 }
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 }
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 }
549 ThreadPriority java_lang_Thread::priority(oop java_thread) {
550 return (ThreadPriority)java_thread->int_field(_priority_offset);
551 }
554 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
555 java_thread->int_field_put(_priority_offset, priority);
556 }
559 oop java_lang_Thread::threadGroup(oop java_thread) {
560 return java_thread->obj_field(_group_offset);
561 }
564 bool java_lang_Thread::is_stillborn(oop java_thread) {
565 return java_thread->bool_field(_stillborn_offset) != 0;
566 }
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 }
575 bool java_lang_Thread::is_alive(oop java_thread) {
576 JavaThread* thr = java_lang_Thread::thread(java_thread);
577 return (thr != NULL);
578 }
581 bool java_lang_Thread::is_daemon(oop java_thread) {
582 return java_thread->bool_field(_daemon_offset) != 0;
583 }
586 void java_lang_Thread::set_daemon(oop java_thread) {
587 java_thread->bool_field_put(_daemon_offset, true);
588 }
590 oop java_lang_Thread::context_class_loader(oop java_thread) {
591 return java_thread->obj_field(_contextClassLoader_offset);
592 }
594 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
595 return java_thread->obj_field(_inheritedAccessControlContext_offset);
596 }
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 }
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 }
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 }
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 }
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");
655 if (_park_blocker_offset > 0) {
656 return java_thread->obj_field(_park_blocker_offset);
657 }
659 return NULL;
660 }
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 }
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 }
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;
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 }
710 // ("name as oop" accessor is not necessary)
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 }
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 }
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 }
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 }
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 }
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 }
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 }
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 }
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 }
761 void java_lang_ThreadGroup::compute_offsets() {
762 assert(_parent_offset == 0, "offsets should be initialized only once");
764 klassOop k = SystemDictionary::threadGroup_klass();
766 COMPUTE_OFFSET("java.lang.ThreadGroup", _parent_offset, k, vmSymbols::parent_name(), vmSymbols::threadgroup_signature());
767 COMPUTE_OFFSET("java.lang.ThreadGroup", _name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
768 COMPUTE_OFFSET("java.lang.ThreadGroup", _threads_offset, k, vmSymbols::threads_name(), vmSymbols::thread_array_signature());
769 COMPUTE_OFFSET("java.lang.ThreadGroup", _groups_offset, k, vmSymbols::groups_name(), vmSymbols::threadgroup_array_signature());
770 COMPUTE_OFFSET("java.lang.ThreadGroup", _maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature());
771 COMPUTE_OFFSET("java.lang.ThreadGroup", _destroyed_offset, k, vmSymbols::destroyed_name(), vmSymbols::bool_signature());
772 COMPUTE_OFFSET("java.lang.ThreadGroup", _daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
773 COMPUTE_OFFSET("java.lang.ThreadGroup", _vmAllowSuspension_offset, k, vmSymbols::vmAllowSuspension_name(), vmSymbols::bool_signature());
774 COMPUTE_OFFSET("java.lang.ThreadGroup", _nthreads_offset, k, vmSymbols::nthreads_name(), vmSymbols::int_signature());
775 COMPUTE_OFFSET("java.lang.ThreadGroup", _ngroups_offset, k, vmSymbols::ngroups_name(), vmSymbols::int_signature());
776 }
778 oop java_lang_Throwable::backtrace(oop throwable) {
779 return throwable->obj_field_acquire(backtrace_offset);
780 }
783 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
784 throwable->release_obj_field_put(backtrace_offset, value);
785 }
788 oop java_lang_Throwable::message(oop throwable) {
789 return throwable->obj_field(detailMessage_offset);
790 }
793 oop java_lang_Throwable::message(Handle throwable) {
794 return throwable->obj_field(detailMessage_offset);
795 }
798 void java_lang_Throwable::set_message(oop throwable, oop value) {
799 throwable->obj_field_put(detailMessage_offset, value);
800 }
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 }
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 }
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 }
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);
848 // Allocate temporary buffer with extra space for formatting and line number
849 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
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 }
873 return buf;
874 }
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 }
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 }
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 }
909 }
912 const char* java_lang_Throwable::no_stack_trace_message() {
913 return "\t<<no stack trace available>>";
914 }
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 }
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)));
934 if (methods.is_null() || bcis.is_null()) {
935 st->print_cr(no_stack_trace_message());
936 return;
937 }
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 }
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 }
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)));
991 if (methods.is_null() || bcis.is_null()) {
992 print_to_stream(stream, no_stack_trace_message());
993 return;
994 }
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 }
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;
1020 public:
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 };
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 }
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->obj_at_addr(0),
1042 _methods->length() * HeapWordsPerOop));
1043 _dirty = false;
1044 }
1045 }
1047 void expand(TRAPS) {
1048 flush();
1050 objArrayHandle old_head(THREAD, _head);
1051 Pause_No_Safepoint_Verifier pnsv(&_nsv);
1053 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
1054 objArrayHandle new_head(THREAD, head);
1056 objArrayOop methods = oopFactory::new_objectArray(trace_chunk_size, CHECK);
1057 objArrayHandle new_methods(THREAD, methods);
1059 typeArrayOop bcis = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1060 typeArrayHandle new_bcis(THREAD, bcis);
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());
1068 _head = new_head();
1069 _methods = new_methods();
1070 _bcis = new_bcis();
1071 _index = 0;
1072 }
1074 oop backtrace() {
1075 flush();
1076 return _backtrace();
1077 }
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 }
1086 // _methods->obj_at_put(_index, method);
1087 *_methods->obj_at_addr(_index) = method;
1088 _bcis->ushort_at_put(_index, bci);
1089 _index++;
1090 _dirty = true;
1091 }
1093 methodOop current_method() {
1094 assert(_index >= 0 && _index < trace_chunk_size, "out of range");
1095 return methodOop(_methods->obj_at(_index));
1096 }
1098 jushort current_bci() {
1099 assert(_index >= 0 && _index < trace_chunk_size, "out of range");
1100 return _bcis->ushort_at(_index);
1101 }
1102 };
1105 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, TRAPS) {
1106 if (!StackTraceInThrowable) return;
1107 ResourceMark rm(THREAD);
1109 // Start out by clearing the backtrace for this object, in case the VM
1110 // runs out of memory while allocating the stack trace
1111 set_backtrace(throwable(), NULL);
1112 if (JDK_Version::is_gte_jdk14x_version()) {
1113 // New since 1.4, clear lazily constructed Java level stacktrace if
1114 // refilling occurs
1115 clear_stacktrace(throwable());
1116 }
1118 int max_depth = MaxJavaStackTraceDepth;
1119 JavaThread* thread = (JavaThread*)THREAD;
1120 BacktraceBuilder bt(CHECK);
1122 // Instead of using vframe directly, this version of fill_in_stack_trace
1123 // basically handles everything by hand. This significantly improved the
1124 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
1125 // See bug 6333838 for more details.
1126 // The "ASSERT" here is to verify this method generates the exactly same stack
1127 // trace as utilizing vframe.
1128 #ifdef ASSERT
1129 vframeStream st(thread);
1130 methodHandle st_method(THREAD, st.method());
1131 #endif
1132 int total_count = 0;
1133 RegisterMap map(thread, false);
1134 int decode_offset = 0;
1135 nmethod* nm = NULL;
1136 bool skip_fillInStackTrace_check = false;
1137 bool skip_throwableInit_check = false;
1139 for (frame fr = thread->last_frame(); max_depth != total_count;) {
1140 methodOop method = NULL;
1141 int bci = 0;
1143 // Compiled java method case.
1144 if (decode_offset != 0) {
1145 DebugInfoReadStream stream(nm, decode_offset);
1146 decode_offset = stream.read_int();
1147 method = (methodOop)nm->oop_at(stream.read_int());
1148 bci = stream.read_bci();
1149 } else {
1150 if (fr.is_first_frame()) break;
1151 address pc = fr.pc();
1152 if (fr.is_interpreted_frame()) {
1153 intptr_t bcx = fr.interpreter_frame_bcx();
1154 method = fr.interpreter_frame_method();
1155 bci = fr.is_bci(bcx) ? bcx : method->bci_from((address)bcx);
1156 fr = fr.sender(&map);
1157 } else {
1158 CodeBlob* cb = fr.cb();
1159 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
1160 // but non nmethod
1161 fr = fr.sender(&map);
1162 if (cb == NULL || !cb->is_nmethod()) {
1163 continue;
1164 }
1165 nm = (nmethod*)cb;
1166 if (nm->method()->is_native()) {
1167 method = nm->method();
1168 bci = 0;
1169 } else {
1170 PcDesc* pd = nm->pc_desc_at(pc);
1171 decode_offset = pd->scope_decode_offset();
1172 // if decode_offset is not equal to 0, it will execute the
1173 // "compiled java method case" at the beginning of the loop.
1174 continue;
1175 }
1176 }
1177 }
1178 #ifdef ASSERT
1179 assert(st_method() == method && st.bci() == bci,
1180 "Wrong stack trace");
1181 st.next();
1182 // vframeStream::method isn't GC-safe so store off a copy
1183 // of the methodOop in case we GC.
1184 if (!st.at_end()) {
1185 st_method = st.method();
1186 }
1187 #endif
1188 if (!skip_fillInStackTrace_check) {
1189 // check "fillInStackTrace" only once, so we negate the flag
1190 // after the first time check.
1191 skip_fillInStackTrace_check = true;
1192 if (method->name() == vmSymbols::fillInStackTrace_name()) {
1193 continue;
1194 }
1195 }
1196 // skip <init> methods of the exceptions klass. If there is <init> methods
1197 // that belongs to a superclass of the exception we are going to skipping
1198 // them in stack trace. This is simlar to classic VM.
1199 if (!skip_throwableInit_check) {
1200 if (method->name() == vmSymbols::object_initializer_name() &&
1201 throwable->is_a(method->method_holder())) {
1202 continue;
1203 } else {
1204 // if no "Throwable.init()" method found, we stop checking it next time.
1205 skip_throwableInit_check = true;
1206 }
1207 }
1208 bt.push(method, bci, CHECK);
1209 total_count++;
1210 }
1212 // Put completed stack trace into throwable object
1213 set_backtrace(throwable(), bt.backtrace());
1214 }
1216 void java_lang_Throwable::fill_in_stack_trace(Handle throwable) {
1217 // No-op if stack trace is disabled
1218 if (!StackTraceInThrowable) {
1219 return;
1220 }
1222 // Disable stack traces for some preallocated out of memory errors
1223 if (!Universe::should_fill_in_stack_trace(throwable)) {
1224 return;
1225 }
1227 PRESERVE_EXCEPTION_MARK;
1229 JavaThread* thread = JavaThread::active();
1230 fill_in_stack_trace(throwable, thread);
1231 // ignore exceptions thrown during stack trace filling
1232 CLEAR_PENDING_EXCEPTION;
1233 }
1235 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
1236 // Allocate stack trace - backtrace is created but not filled in
1238 // No-op if stack trace is disabled
1239 if (!StackTraceInThrowable) return;
1241 objArrayOop h_oop = oopFactory::new_objectArray(trace_size, CHECK);
1242 objArrayHandle backtrace (THREAD, h_oop);
1243 objArrayOop m_oop = oopFactory::new_objectArray(trace_chunk_size, CHECK);
1244 objArrayHandle methods (THREAD, m_oop);
1245 typeArrayOop b = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1246 typeArrayHandle bcis(THREAD, b);
1248 // backtrace has space for one chunk (next is NULL)
1249 backtrace->obj_at_put(trace_methods_offset, methods());
1250 backtrace->obj_at_put(trace_bcis_offset, bcis());
1251 set_backtrace(throwable(), backtrace());
1252 }
1255 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
1256 // Fill in stack trace into preallocated backtrace (no GC)
1258 // No-op if stack trace is disabled
1259 if (!StackTraceInThrowable) return;
1261 assert(throwable->is_a(SystemDictionary::throwable_klass()), "sanity check");
1263 oop backtrace = java_lang_Throwable::backtrace(throwable());
1264 assert(backtrace != NULL, "backtrace not preallocated");
1266 oop m = objArrayOop(backtrace)->obj_at(trace_methods_offset);
1267 objArrayOop methods = objArrayOop(m);
1268 assert(methods != NULL && methods->length() > 0, "method array not preallocated");
1270 oop b = objArrayOop(backtrace)->obj_at(trace_bcis_offset);
1271 typeArrayOop bcis = typeArrayOop(b);
1272 assert(bcis != NULL, "bci array not preallocated");
1274 assert(methods->length() == bcis->length(), "method and bci arrays should match");
1276 JavaThread* thread = JavaThread::current();
1277 ResourceMark rm(thread);
1278 vframeStream st(thread);
1280 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
1281 // methods as preallocated errors aren't created by "java" code.
1283 // fill in as much stack trace as possible
1284 int max_chunks = MIN2(methods->length(), (int)MaxJavaStackTraceDepth);
1285 int chunk_count = 0;
1287 for (;!st.at_end(); st.next()) {
1288 // add element
1289 bcis->ushort_at_put(chunk_count, st.bci());
1290 methods->obj_at_put(chunk_count, st.method());
1292 chunk_count++;
1294 // Bail-out for deep stacks
1295 if (chunk_count >= max_chunks) break;
1296 }
1297 }
1300 int java_lang_Throwable::get_stack_trace_depth(oop throwable, TRAPS) {
1301 if (throwable == NULL) {
1302 THROW_0(vmSymbols::java_lang_NullPointerException());
1303 }
1304 objArrayOop chunk = objArrayOop(backtrace(throwable));
1305 int depth = 0;
1306 if (chunk != NULL) {
1307 // Iterate over chunks and count full ones
1308 while (true) {
1309 objArrayOop next = objArrayOop(chunk->obj_at(trace_next_offset));
1310 if (next == NULL) break;
1311 depth += trace_chunk_size;
1312 chunk = next;
1313 }
1314 assert(chunk != NULL && chunk->obj_at(trace_next_offset) == NULL, "sanity check");
1315 // Count element in remaining partial chunk
1316 objArrayOop methods = objArrayOop(chunk->obj_at(trace_methods_offset));
1317 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1318 assert(methods != NULL && bcis != NULL, "sanity check");
1319 for (int i = 0; i < methods->length(); i++) {
1320 if (methods->obj_at(i) == NULL) break;
1321 depth++;
1322 }
1323 }
1324 return depth;
1325 }
1328 oop java_lang_Throwable::get_stack_trace_element(oop throwable, int index, TRAPS) {
1329 if (throwable == NULL) {
1330 THROW_0(vmSymbols::java_lang_NullPointerException());
1331 }
1332 if (index < 0) {
1333 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1334 }
1335 // Compute how many chunks to skip and index into actual chunk
1336 objArrayOop chunk = objArrayOop(backtrace(throwable));
1337 int skip_chunks = index / trace_chunk_size;
1338 int chunk_index = index % trace_chunk_size;
1339 while (chunk != NULL && skip_chunks > 0) {
1340 chunk = objArrayOop(chunk->obj_at(trace_next_offset));
1341 skip_chunks--;
1342 }
1343 if (chunk == NULL) {
1344 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1345 }
1346 // Get method,bci from chunk
1347 objArrayOop methods = objArrayOop(chunk->obj_at(trace_methods_offset));
1348 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1349 assert(methods != NULL && bcis != NULL, "sanity check");
1350 methodHandle method(THREAD, methodOop(methods->obj_at(chunk_index)));
1351 int bci = bcis->ushort_at(chunk_index);
1352 // Chunk can be partial full
1353 if (method.is_null()) {
1354 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1355 }
1357 oop element = java_lang_StackTraceElement::create(method, bci, CHECK_0);
1358 return element;
1359 }
1361 oop java_lang_StackTraceElement::create(methodHandle method, int bci, TRAPS) {
1362 // SystemDictionary::stackTraceElement_klass() will be null for pre-1.4 JDKs
1363 assert(JDK_Version::is_gte_jdk14x_version(), "should only be called in >= 1.4");
1365 // Allocate java.lang.StackTraceElement instance
1366 klassOop k = SystemDictionary::stackTraceElement_klass();
1367 instanceKlassHandle ik (THREAD, k);
1368 if (ik->should_be_initialized()) {
1369 ik->initialize(CHECK_0);
1370 }
1372 Handle element = ik->allocate_instance_handle(CHECK_0);
1373 // Fill in class name
1374 ResourceMark rm(THREAD);
1375 const char* str = instanceKlass::cast(method->method_holder())->external_name();
1376 oop classname = StringTable::intern((char*) str, CHECK_0);
1377 java_lang_StackTraceElement::set_declaringClass(element(), classname);
1378 // Fill in method name
1379 oop methodname = StringTable::intern(method->name(), CHECK_0);
1380 java_lang_StackTraceElement::set_methodName(element(), methodname);
1381 // Fill in source file name
1382 symbolOop source = instanceKlass::cast(method->method_holder())->source_file_name();
1383 oop filename = StringTable::intern(source, CHECK_0);
1384 java_lang_StackTraceElement::set_fileName(element(), filename);
1385 // File in source line number
1386 int line_number;
1387 if (method->is_native()) {
1388 // Negative value different from -1 below, enabling Java code in
1389 // class java.lang.StackTraceElement to distinguish "native" from
1390 // "no LineNumberTable".
1391 line_number = -2;
1392 } else {
1393 // Returns -1 if no LineNumberTable, and otherwise actual line number
1394 line_number = method->line_number_from_bci(bci);
1395 }
1396 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
1398 return element();
1399 }
1402 void java_lang_reflect_AccessibleObject::compute_offsets() {
1403 klassOop k = SystemDictionary::reflect_accessible_object_klass();
1404 COMPUTE_OFFSET("java.lang.reflect.AccessibleObject", override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature());
1405 }
1407 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
1408 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1409 return (jboolean) reflect->bool_field(override_offset);
1410 }
1412 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
1413 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1414 reflect->bool_field_put(override_offset, (int) value);
1415 }
1417 void java_lang_reflect_Method::compute_offsets() {
1418 klassOop k = SystemDictionary::reflect_method_klass();
1419 COMPUTE_OFFSET("java.lang.reflect.Method", clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
1420 COMPUTE_OFFSET("java.lang.reflect.Method", name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1421 COMPUTE_OFFSET("java.lang.reflect.Method", returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature());
1422 COMPUTE_OFFSET("java.lang.reflect.Method", parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
1423 COMPUTE_OFFSET("java.lang.reflect.Method", exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
1424 COMPUTE_OFFSET("java.lang.reflect.Method", slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
1425 COMPUTE_OFFSET("java.lang.reflect.Method", modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
1426 // The generic signature and annotations fields are only present in 1.5
1427 signature_offset = -1;
1428 annotations_offset = -1;
1429 parameter_annotations_offset = -1;
1430 annotation_default_offset = -1;
1431 COMPUTE_OPTIONAL_OFFSET("java.lang.reflect.Method", signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
1432 COMPUTE_OPTIONAL_OFFSET("java.lang.reflect.Method", annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
1433 COMPUTE_OPTIONAL_OFFSET("java.lang.reflect.Method", parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
1434 COMPUTE_OPTIONAL_OFFSET("java.lang.reflect.Method", annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature());
1435 }
1437 Handle java_lang_reflect_Method::create(TRAPS) {
1438 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1439 klassOop klass = SystemDictionary::reflect_method_klass();
1440 // This class is eagerly initialized during VM initialization, since we keep a refence
1441 // to one of the methods
1442 assert(instanceKlass::cast(klass)->is_initialized(), "must be initialized");
1443 return instanceKlass::cast(klass)->allocate_instance_handle(CHECK_NH);
1444 }
1446 oop java_lang_reflect_Method::clazz(oop reflect) {
1447 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1448 return reflect->obj_field(clazz_offset);
1449 }
1451 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
1452 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1453 reflect->obj_field_put(clazz_offset, value);
1454 }
1456 int java_lang_reflect_Method::slot(oop reflect) {
1457 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1458 return reflect->int_field(slot_offset);
1459 }
1461 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
1462 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1463 reflect->int_field_put(slot_offset, value);
1464 }
1466 oop java_lang_reflect_Method::name(oop method) {
1467 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1468 return method->obj_field(name_offset);
1469 }
1471 void java_lang_reflect_Method::set_name(oop method, oop value) {
1472 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1473 method->obj_field_put(name_offset, value);
1474 }
1476 oop java_lang_reflect_Method::return_type(oop method) {
1477 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1478 return method->obj_field(returnType_offset);
1479 }
1481 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
1482 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1483 method->obj_field_put(returnType_offset, value);
1484 }
1486 oop java_lang_reflect_Method::parameter_types(oop method) {
1487 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1488 return method->obj_field(parameterTypes_offset);
1489 }
1491 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
1492 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1493 method->obj_field_put(parameterTypes_offset, value);
1494 }
1496 oop java_lang_reflect_Method::exception_types(oop method) {
1497 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1498 return method->obj_field(exceptionTypes_offset);
1499 }
1501 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
1502 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1503 method->obj_field_put(exceptionTypes_offset, value);
1504 }
1506 int java_lang_reflect_Method::modifiers(oop method) {
1507 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1508 return method->int_field(modifiers_offset);
1509 }
1511 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
1512 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1513 method->int_field_put(modifiers_offset, value);
1514 }
1516 bool java_lang_reflect_Method::has_signature_field() {
1517 return (signature_offset >= 0);
1518 }
1520 oop java_lang_reflect_Method::signature(oop method) {
1521 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1522 assert(has_signature_field(), "signature field must be present");
1523 return method->obj_field(signature_offset);
1524 }
1526 void java_lang_reflect_Method::set_signature(oop method, oop value) {
1527 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1528 assert(has_signature_field(), "signature field must be present");
1529 method->obj_field_put(signature_offset, value);
1530 }
1532 bool java_lang_reflect_Method::has_annotations_field() {
1533 return (annotations_offset >= 0);
1534 }
1536 oop java_lang_reflect_Method::annotations(oop method) {
1537 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1538 assert(has_annotations_field(), "annotations field must be present");
1539 return method->obj_field(annotations_offset);
1540 }
1542 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
1543 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1544 assert(has_annotations_field(), "annotations field must be present");
1545 method->obj_field_put(annotations_offset, value);
1546 }
1548 bool java_lang_reflect_Method::has_parameter_annotations_field() {
1549 return (parameter_annotations_offset >= 0);
1550 }
1552 oop java_lang_reflect_Method::parameter_annotations(oop method) {
1553 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1554 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
1555 return method->obj_field(parameter_annotations_offset);
1556 }
1558 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
1559 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1560 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
1561 method->obj_field_put(parameter_annotations_offset, value);
1562 }
1564 bool java_lang_reflect_Method::has_annotation_default_field() {
1565 return (annotation_default_offset >= 0);
1566 }
1568 oop java_lang_reflect_Method::annotation_default(oop method) {
1569 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1570 assert(has_annotation_default_field(), "annotation default field must be present");
1571 return method->obj_field(annotation_default_offset);
1572 }
1574 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
1575 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1576 assert(has_annotation_default_field(), "annotation default field must be present");
1577 method->obj_field_put(annotation_default_offset, value);
1578 }
1580 void java_lang_reflect_Constructor::compute_offsets() {
1581 klassOop k = SystemDictionary::reflect_constructor_klass();
1582 COMPUTE_OFFSET("java.lang.reflect.Constructor", clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
1583 COMPUTE_OFFSET("java.lang.reflect.Constructor", parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
1584 COMPUTE_OFFSET("java.lang.reflect.Constructor", exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
1585 COMPUTE_OFFSET("java.lang.reflect.Constructor", slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
1586 COMPUTE_OFFSET("java.lang.reflect.Constructor", modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
1587 // The generic signature and annotations fields are only present in 1.5
1588 signature_offset = -1;
1589 annotations_offset = -1;
1590 parameter_annotations_offset = -1;
1591 COMPUTE_OPTIONAL_OFFSET("java.lang.reflect.Constructor", signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
1592 COMPUTE_OPTIONAL_OFFSET("java.lang.reflect.Constructor", annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
1593 COMPUTE_OPTIONAL_OFFSET("java.lang.reflect.Constructor", parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
1594 }
1596 Handle java_lang_reflect_Constructor::create(TRAPS) {
1597 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1598 symbolHandle name = vmSymbolHandles::java_lang_reflect_Constructor();
1599 klassOop k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
1600 instanceKlassHandle klass (THREAD, k);
1601 // Ensure it is initialized
1602 klass->initialize(CHECK_NH);
1603 return klass->allocate_instance_handle(CHECK_NH);
1604 }
1606 oop java_lang_reflect_Constructor::clazz(oop reflect) {
1607 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1608 return reflect->obj_field(clazz_offset);
1609 }
1611 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
1612 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1613 reflect->obj_field_put(clazz_offset, value);
1614 }
1616 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
1617 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1618 return constructor->obj_field(parameterTypes_offset);
1619 }
1621 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
1622 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1623 constructor->obj_field_put(parameterTypes_offset, value);
1624 }
1626 oop java_lang_reflect_Constructor::exception_types(oop constructor) {
1627 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1628 return constructor->obj_field(exceptionTypes_offset);
1629 }
1631 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
1632 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1633 constructor->obj_field_put(exceptionTypes_offset, value);
1634 }
1636 int java_lang_reflect_Constructor::slot(oop reflect) {
1637 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1638 return reflect->int_field(slot_offset);
1639 }
1641 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
1642 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1643 reflect->int_field_put(slot_offset, value);
1644 }
1646 int java_lang_reflect_Constructor::modifiers(oop constructor) {
1647 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1648 return constructor->int_field(modifiers_offset);
1649 }
1651 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
1652 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1653 constructor->int_field_put(modifiers_offset, value);
1654 }
1656 bool java_lang_reflect_Constructor::has_signature_field() {
1657 return (signature_offset >= 0);
1658 }
1660 oop java_lang_reflect_Constructor::signature(oop constructor) {
1661 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1662 assert(has_signature_field(), "signature field must be present");
1663 return constructor->obj_field(signature_offset);
1664 }
1666 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
1667 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1668 assert(has_signature_field(), "signature field must be present");
1669 constructor->obj_field_put(signature_offset, value);
1670 }
1672 bool java_lang_reflect_Constructor::has_annotations_field() {
1673 return (annotations_offset >= 0);
1674 }
1676 oop java_lang_reflect_Constructor::annotations(oop constructor) {
1677 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1678 assert(has_annotations_field(), "annotations field must be present");
1679 return constructor->obj_field(annotations_offset);
1680 }
1682 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
1683 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1684 assert(has_annotations_field(), "annotations field must be present");
1685 constructor->obj_field_put(annotations_offset, value);
1686 }
1688 bool java_lang_reflect_Constructor::has_parameter_annotations_field() {
1689 return (parameter_annotations_offset >= 0);
1690 }
1692 oop java_lang_reflect_Constructor::parameter_annotations(oop method) {
1693 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1694 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
1695 return method->obj_field(parameter_annotations_offset);
1696 }
1698 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
1699 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1700 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
1701 method->obj_field_put(parameter_annotations_offset, value);
1702 }
1704 void java_lang_reflect_Field::compute_offsets() {
1705 klassOop k = SystemDictionary::reflect_field_klass();
1706 COMPUTE_OFFSET("java.lang.reflect.Field", clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
1707 COMPUTE_OFFSET("java.lang.reflect.Field", name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1708 COMPUTE_OFFSET("java.lang.reflect.Field", type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature());
1709 COMPUTE_OFFSET("java.lang.reflect.Field", slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
1710 COMPUTE_OFFSET("java.lang.reflect.Field", modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
1711 // The generic signature and annotations fields are only present in 1.5
1712 signature_offset = -1;
1713 annotations_offset = -1;
1714 COMPUTE_OPTIONAL_OFFSET("java.lang.reflect.Field", signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
1715 COMPUTE_OPTIONAL_OFFSET("java.lang.reflect.Field", annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
1716 }
1718 Handle java_lang_reflect_Field::create(TRAPS) {
1719 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1720 symbolHandle name = vmSymbolHandles::java_lang_reflect_Field();
1721 klassOop k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
1722 instanceKlassHandle klass (THREAD, k);
1723 // Ensure it is initialized
1724 klass->initialize(CHECK_NH);
1725 return klass->allocate_instance_handle(CHECK_NH);
1726 }
1728 oop java_lang_reflect_Field::clazz(oop reflect) {
1729 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1730 return reflect->obj_field(clazz_offset);
1731 }
1733 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
1734 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1735 reflect->obj_field_put(clazz_offset, value);
1736 }
1738 oop java_lang_reflect_Field::name(oop field) {
1739 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1740 return field->obj_field(name_offset);
1741 }
1743 void java_lang_reflect_Field::set_name(oop field, oop value) {
1744 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1745 field->obj_field_put(name_offset, value);
1746 }
1748 oop java_lang_reflect_Field::type(oop field) {
1749 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1750 return field->obj_field(type_offset);
1751 }
1753 void java_lang_reflect_Field::set_type(oop field, oop value) {
1754 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1755 field->obj_field_put(type_offset, value);
1756 }
1758 int java_lang_reflect_Field::slot(oop reflect) {
1759 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1760 return reflect->int_field(slot_offset);
1761 }
1763 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
1764 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1765 reflect->int_field_put(slot_offset, value);
1766 }
1768 int java_lang_reflect_Field::modifiers(oop field) {
1769 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1770 return field->int_field(modifiers_offset);
1771 }
1773 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
1774 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1775 field->int_field_put(modifiers_offset, value);
1776 }
1778 bool java_lang_reflect_Field::has_signature_field() {
1779 return (signature_offset >= 0);
1780 }
1782 oop java_lang_reflect_Field::signature(oop field) {
1783 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1784 assert(has_signature_field(), "signature field must be present");
1785 return field->obj_field(signature_offset);
1786 }
1788 void java_lang_reflect_Field::set_signature(oop field, oop value) {
1789 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1790 assert(has_signature_field(), "signature field must be present");
1791 field->obj_field_put(signature_offset, value);
1792 }
1794 bool java_lang_reflect_Field::has_annotations_field() {
1795 return (annotations_offset >= 0);
1796 }
1798 oop java_lang_reflect_Field::annotations(oop field) {
1799 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1800 assert(has_annotations_field(), "annotations field must be present");
1801 return field->obj_field(annotations_offset);
1802 }
1804 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
1805 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1806 assert(has_annotations_field(), "annotations field must be present");
1807 field->obj_field_put(annotations_offset, value);
1808 }
1811 void sun_reflect_ConstantPool::compute_offsets() {
1812 klassOop k = SystemDictionary::reflect_constant_pool_klass();
1813 // This null test can be removed post beta
1814 if (k != NULL) {
1815 COMPUTE_OFFSET("sun.reflect.ConstantPool", _cp_oop_offset, k, vmSymbols::constantPoolOop_name(), vmSymbols::object_signature());
1816 }
1817 }
1820 Handle sun_reflect_ConstantPool::create(TRAPS) {
1821 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1822 klassOop k = SystemDictionary::reflect_constant_pool_klass();
1823 instanceKlassHandle klass (THREAD, k);
1824 // Ensure it is initialized
1825 klass->initialize(CHECK_NH);
1826 return klass->allocate_instance_handle(CHECK_NH);
1827 }
1830 oop sun_reflect_ConstantPool::cp_oop(oop reflect) {
1831 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1832 return reflect->obj_field(_cp_oop_offset);
1833 }
1836 void sun_reflect_ConstantPool::set_cp_oop(oop reflect, oop value) {
1837 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1838 reflect->obj_field_put(_cp_oop_offset, value);
1839 }
1841 void sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
1842 klassOop k = SystemDictionary::reflect_unsafe_static_field_accessor_impl_klass();
1843 // This null test can be removed post beta
1844 if (k != NULL) {
1845 COMPUTE_OFFSET("sun.reflect.UnsafeStaticFieldAccessorImpl", _base_offset, k,
1846 vmSymbols::base_name(), vmSymbols::object_signature());
1847 }
1848 }
1850 oop java_lang_boxing_object::initialize_and_allocate(klassOop k, TRAPS) {
1851 instanceKlassHandle h (THREAD, k);
1852 if (!h->is_initialized()) h->initialize(CHECK_0);
1853 return h->allocate_instance(THREAD);
1854 }
1857 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
1858 oop box;
1859 switch (type) {
1860 case T_BOOLEAN:
1861 box = initialize_and_allocate(SystemDictionary::boolean_klass(), CHECK_0);
1862 box->bool_field_put(value_offset, value->z);
1863 break;
1864 case T_CHAR:
1865 box = initialize_and_allocate(SystemDictionary::char_klass(), CHECK_0);
1866 box->char_field_put(value_offset, value->c);
1867 break;
1868 case T_FLOAT:
1869 box = initialize_and_allocate(SystemDictionary::float_klass(), CHECK_0);
1870 box->float_field_put(value_offset, value->f);
1871 break;
1872 case T_DOUBLE:
1873 box = initialize_and_allocate(SystemDictionary::double_klass(), CHECK_0);
1874 box->double_field_put(value_offset, value->d);
1875 break;
1876 case T_BYTE:
1877 box = initialize_and_allocate(SystemDictionary::byte_klass(), CHECK_0);
1878 box->byte_field_put(value_offset, value->b);
1879 break;
1880 case T_SHORT:
1881 box = initialize_and_allocate(SystemDictionary::short_klass(), CHECK_0);
1882 box->short_field_put(value_offset, value->s);
1883 break;
1884 case T_INT:
1885 box = initialize_and_allocate(SystemDictionary::int_klass(), CHECK_0);
1886 box->int_field_put(value_offset, value->i);
1887 break;
1888 case T_LONG:
1889 box = initialize_and_allocate(SystemDictionary::long_klass(), CHECK_0);
1890 box->long_field_put(value_offset, value->j);
1891 break;
1892 default:
1893 return NULL;
1894 }
1895 return box;
1896 }
1899 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
1900 klassOop k = box->klass();
1901 if (k == SystemDictionary::boolean_klass()) {
1902 value->z = box->bool_field(value_offset);
1903 return T_BOOLEAN;
1904 }
1905 if (k == SystemDictionary::char_klass()) {
1906 value->c = box->char_field(value_offset);
1907 return T_CHAR;
1908 }
1909 if (k == SystemDictionary::float_klass()) {
1910 value->f = box->float_field(value_offset);
1911 return T_FLOAT;
1912 }
1913 if (k == SystemDictionary::double_klass()) {
1914 value->d = box->double_field(value_offset);
1915 return T_DOUBLE;
1916 }
1917 if (k == SystemDictionary::byte_klass()) {
1918 value->b = box->byte_field(value_offset);
1919 return T_BYTE;
1920 }
1921 if (k == SystemDictionary::short_klass()) {
1922 value->s = box->short_field(value_offset);
1923 return T_SHORT;
1924 }
1925 if (k == SystemDictionary::int_klass()) {
1926 value->i = box->int_field(value_offset);
1927 return T_INT;
1928 }
1929 if (k == SystemDictionary::long_klass()) {
1930 value->j = box->long_field(value_offset);
1931 return T_LONG;
1932 }
1933 return T_ILLEGAL;
1934 }
1937 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
1938 klassOop k = box->klass();
1939 if (k == SystemDictionary::boolean_klass()) {
1940 box->bool_field_put(value_offset, value->z);
1941 return T_BOOLEAN;
1942 }
1943 if (k == SystemDictionary::char_klass()) {
1944 box->char_field_put(value_offset, value->c);
1945 return T_CHAR;
1946 }
1947 if (k == SystemDictionary::float_klass()) {
1948 box->float_field_put(value_offset, value->f);
1949 return T_FLOAT;
1950 }
1951 if (k == SystemDictionary::double_klass()) {
1952 box->double_field_put(value_offset, value->d);
1953 return T_DOUBLE;
1954 }
1955 if (k == SystemDictionary::byte_klass()) {
1956 box->byte_field_put(value_offset, value->b);
1957 return T_BYTE;
1958 }
1959 if (k == SystemDictionary::short_klass()) {
1960 box->short_field_put(value_offset, value->s);
1961 return T_SHORT;
1962 }
1963 if (k == SystemDictionary::int_klass()) {
1964 box->int_field_put(value_offset, value->i);
1965 return T_INT;
1966 }
1967 if (k == SystemDictionary::long_klass()) {
1968 box->long_field_put(value_offset, value->j);
1969 return T_LONG;
1970 }
1971 return T_ILLEGAL;
1972 }
1975 // Support for java_lang_ref_Reference
1977 void java_lang_ref_Reference::set_referent(oop ref, oop value) {
1978 ref->obj_field_put(referent_offset, value);
1979 }
1981 oop* java_lang_ref_Reference::referent_addr(oop ref) {
1982 return ref->obj_field_addr(referent_offset);
1983 }
1985 void java_lang_ref_Reference::set_next(oop ref, oop value) {
1986 ref->obj_field_put(next_offset, value);
1987 }
1989 oop* java_lang_ref_Reference::next_addr(oop ref) {
1990 return ref->obj_field_addr(next_offset);
1991 }
1993 void java_lang_ref_Reference::set_discovered(oop ref, oop value) {
1994 ref->obj_field_put(discovered_offset, value);
1995 }
1997 oop* java_lang_ref_Reference::discovered_addr(oop ref) {
1998 return ref->obj_field_addr(discovered_offset);
1999 }
2001 oop* java_lang_ref_Reference::pending_list_lock_addr() {
2002 instanceKlass* ik = instanceKlass::cast(SystemDictionary::reference_klass());
2003 return (oop*)(((char *)ik->start_of_static_fields()) + static_lock_offset);
2004 }
2006 oop* java_lang_ref_Reference::pending_list_addr() {
2007 instanceKlass* ik = instanceKlass::cast(SystemDictionary::reference_klass());
2008 return (oop *)(((char *)ik->start_of_static_fields()) + static_pending_offset);
2009 }
2012 // Support for java_lang_ref_SoftReference
2014 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
2015 return ref->long_field(timestamp_offset);
2016 }
2018 jlong java_lang_ref_SoftReference::clock() {
2019 instanceKlass* ik = instanceKlass::cast(SystemDictionary::soft_reference_klass());
2020 int offset = ik->offset_of_static_fields() + static_clock_offset;
2022 return SystemDictionary::soft_reference_klass()->long_field(offset);
2023 }
2025 void java_lang_ref_SoftReference::set_clock(jlong value) {
2026 instanceKlass* ik = instanceKlass::cast(SystemDictionary::soft_reference_klass());
2027 int offset = ik->offset_of_static_fields() + static_clock_offset;
2029 SystemDictionary::soft_reference_klass()->long_field_put(offset, value);
2030 }
2033 // Support for java_security_AccessControlContext
2035 int java_security_AccessControlContext::_context_offset = 0;
2036 int java_security_AccessControlContext::_privilegedContext_offset = 0;
2037 int java_security_AccessControlContext::_isPrivileged_offset = 0;
2040 void java_security_AccessControlContext::compute_offsets() {
2041 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
2042 fieldDescriptor fd;
2043 instanceKlass* ik = instanceKlass::cast(SystemDictionary::AccessControlContext_klass());
2045 if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) {
2046 fatal("Invalid layout of java.security.AccessControlContext");
2047 }
2048 _context_offset = fd.offset();
2050 if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) {
2051 fatal("Invalid layout of java.security.AccessControlContext");
2052 }
2053 _privilegedContext_offset = fd.offset();
2055 if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) {
2056 fatal("Invalid layout of java.security.AccessControlContext");
2057 }
2058 _isPrivileged_offset = fd.offset();
2059 }
2062 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
2063 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
2064 // Ensure klass is initialized
2065 instanceKlass::cast(SystemDictionary::AccessControlContext_klass())->initialize(CHECK_0);
2066 // Allocate result
2067 oop result = instanceKlass::cast(SystemDictionary::AccessControlContext_klass())->allocate_instance(CHECK_0);
2068 // Fill in values
2069 result->obj_field_put(_context_offset, context());
2070 result->obj_field_put(_privilegedContext_offset, privileged_context());
2071 result->bool_field_put(_isPrivileged_offset, isPrivileged);
2072 return result;
2073 }
2076 // Support for java_lang_ClassLoader
2078 oop java_lang_ClassLoader::parent(oop loader) {
2079 assert(loader->is_oop(), "loader must be oop");
2080 return loader->obj_field(parent_offset);
2081 }
2084 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
2085 // Fix for 4474172; see evaluation for more details
2086 loader = non_reflection_class_loader(loader);
2088 oop cl = SystemDictionary::java_system_loader();
2089 while(cl != NULL) {
2090 if (cl == loader) return true;
2091 cl = parent(cl);
2092 }
2093 return false;
2094 }
2096 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
2097 if (loader != NULL) {
2098 // See whether this is one of the class loaders associated with
2099 // the generated bytecodes for reflection, and if so, "magically"
2100 // delegate to its parent to prevent class loading from occurring
2101 // in places where applications using reflection didn't expect it.
2102 klassOop delegating_cl_class = SystemDictionary::reflect_delegating_classloader_klass();
2103 // This might be null in non-1.4 JDKs
2104 if (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)) {
2105 return parent(loader);
2106 }
2107 }
2108 return loader;
2109 }
2112 // Support for java_lang_System
2114 void java_lang_System::compute_offsets() {
2115 assert(offset_of_static_fields == 0, "offsets should be initialized only once");
2117 instanceKlass* ik = instanceKlass::cast(SystemDictionary::system_klass());
2118 offset_of_static_fields = ik->offset_of_static_fields();
2119 }
2121 int java_lang_System::in_offset_in_bytes() {
2122 return (offset_of_static_fields + static_in_offset);
2123 }
2126 int java_lang_System::out_offset_in_bytes() {
2127 return (offset_of_static_fields + static_out_offset);
2128 }
2131 int java_lang_System::err_offset_in_bytes() {
2132 return (offset_of_static_fields + static_err_offset);
2133 }
2137 int java_lang_String::value_offset;
2138 int java_lang_String::offset_offset;
2139 int java_lang_String::count_offset;
2140 int java_lang_String::hash_offset;
2141 int java_lang_Class::klass_offset;
2142 int java_lang_Class::array_klass_offset;
2143 int java_lang_Class::resolved_constructor_offset;
2144 int java_lang_Class::number_of_fake_oop_fields;
2145 int java_lang_Throwable::backtrace_offset;
2146 int java_lang_Throwable::detailMessage_offset;
2147 int java_lang_Throwable::cause_offset;
2148 int java_lang_Throwable::stackTrace_offset;
2149 int java_lang_reflect_AccessibleObject::override_offset;
2150 int java_lang_reflect_Method::clazz_offset;
2151 int java_lang_reflect_Method::name_offset;
2152 int java_lang_reflect_Method::returnType_offset;
2153 int java_lang_reflect_Method::parameterTypes_offset;
2154 int java_lang_reflect_Method::exceptionTypes_offset;
2155 int java_lang_reflect_Method::slot_offset;
2156 int java_lang_reflect_Method::modifiers_offset;
2157 int java_lang_reflect_Method::signature_offset;
2158 int java_lang_reflect_Method::annotations_offset;
2159 int java_lang_reflect_Method::parameter_annotations_offset;
2160 int java_lang_reflect_Method::annotation_default_offset;
2161 int java_lang_reflect_Constructor::clazz_offset;
2162 int java_lang_reflect_Constructor::parameterTypes_offset;
2163 int java_lang_reflect_Constructor::exceptionTypes_offset;
2164 int java_lang_reflect_Constructor::slot_offset;
2165 int java_lang_reflect_Constructor::modifiers_offset;
2166 int java_lang_reflect_Constructor::signature_offset;
2167 int java_lang_reflect_Constructor::annotations_offset;
2168 int java_lang_reflect_Constructor::parameter_annotations_offset;
2169 int java_lang_reflect_Field::clazz_offset;
2170 int java_lang_reflect_Field::name_offset;
2171 int java_lang_reflect_Field::type_offset;
2172 int java_lang_reflect_Field::slot_offset;
2173 int java_lang_reflect_Field::modifiers_offset;
2174 int java_lang_reflect_Field::signature_offset;
2175 int java_lang_reflect_Field::annotations_offset;
2176 int java_lang_boxing_object::value_offset;
2177 int java_lang_ref_Reference::referent_offset;
2178 int java_lang_ref_Reference::queue_offset;
2179 int java_lang_ref_Reference::next_offset;
2180 int java_lang_ref_Reference::discovered_offset;
2181 int java_lang_ref_Reference::static_lock_offset;
2182 int java_lang_ref_Reference::static_pending_offset;
2183 int java_lang_ref_Reference::number_of_fake_oop_fields;
2184 int java_lang_ref_SoftReference::timestamp_offset;
2185 int java_lang_ref_SoftReference::static_clock_offset;
2186 int java_lang_ClassLoader::parent_offset;
2187 int java_lang_System::offset_of_static_fields;
2188 int java_lang_System::static_in_offset;
2189 int java_lang_System::static_out_offset;
2190 int java_lang_System::static_err_offset;
2191 int java_lang_StackTraceElement::declaringClass_offset;
2192 int java_lang_StackTraceElement::methodName_offset;
2193 int java_lang_StackTraceElement::fileName_offset;
2194 int java_lang_StackTraceElement::lineNumber_offset;
2195 int java_lang_AssertionStatusDirectives::classes_offset;
2196 int java_lang_AssertionStatusDirectives::classEnabled_offset;
2197 int java_lang_AssertionStatusDirectives::packages_offset;
2198 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
2199 int java_lang_AssertionStatusDirectives::deflt_offset;
2200 int java_nio_Buffer::_limit_offset;
2201 int sun_misc_AtomicLongCSImpl::_value_offset;
2202 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0;
2203 int sun_reflect_ConstantPool::_cp_oop_offset;
2204 int sun_reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
2207 // Support for java_lang_StackTraceElement
2209 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
2210 element->obj_field_put(fileName_offset, value);
2211 }
2213 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
2214 element->obj_field_put(declaringClass_offset, value);
2215 }
2217 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
2218 element->obj_field_put(methodName_offset, value);
2219 }
2221 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
2222 element->int_field_put(lineNumber_offset, value);
2223 }
2226 // Support for java Assertions - java_lang_AssertionStatusDirectives.
2228 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
2229 o->obj_field_put(classes_offset, val);
2230 }
2232 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
2233 o->obj_field_put(classEnabled_offset, val);
2234 }
2236 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
2237 o->obj_field_put(packages_offset, val);
2238 }
2240 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
2241 o->obj_field_put(packageEnabled_offset, val);
2242 }
2244 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
2245 o->bool_field_put(deflt_offset, val);
2246 }
2249 // Support for intrinsification of java.nio.Buffer.checkIndex
2250 int java_nio_Buffer::limit_offset() {
2251 return _limit_offset;
2252 }
2255 void java_nio_Buffer::compute_offsets() {
2256 klassOop k = SystemDictionary::java_nio_Buffer_klass();
2257 COMPUTE_OFFSET("java.nio.Buffer", _limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature());
2258 }
2260 // Support for intrinsification of sun.misc.AtomicLongCSImpl.attemptUpdate
2261 int sun_misc_AtomicLongCSImpl::value_offset() {
2262 assert(SystemDictionary::sun_misc_AtomicLongCSImpl_klass() != NULL, "can't call this");
2263 return _value_offset;
2264 }
2267 void sun_misc_AtomicLongCSImpl::compute_offsets() {
2268 klassOop k = SystemDictionary::sun_misc_AtomicLongCSImpl_klass();
2269 // If this class is not present, its value field offset won't be referenced.
2270 if (k != NULL) {
2271 COMPUTE_OFFSET("sun.misc.AtomicLongCSImpl", _value_offset, k, vmSymbols::value_name(), vmSymbols::long_signature());
2272 }
2273 }
2275 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) {
2276 if (_owner_offset != 0) return;
2278 assert(JDK_Version::is_gte_jdk16x_version(), "Must be JDK 1.6 or later");
2279 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK);
2280 klassOop k = SystemDictionary::abstract_ownable_synchronizer_klass();
2281 COMPUTE_OFFSET("java.util.concurrent.locks.AbstractOwnableSynchronizer", _owner_offset, k,
2282 vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature());
2283 }
2285 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
2286 assert(_owner_offset != 0, "Must be initialized");
2287 return obj->obj_field(_owner_offset);
2288 }
2290 // Compute hard-coded offsets
2291 // Invoked before SystemDictionary::initialize, so pre-loaded classes
2292 // are not available to determine the offset_of_static_fields.
2293 void JavaClasses::compute_hard_coded_offsets() {
2294 const int x = wordSize;
2295 const int header = instanceOopDesc::header_size_in_bytes();
2297 // Do the String Class
2298 java_lang_String::value_offset = java_lang_String::hc_value_offset * x + header;
2299 java_lang_String::offset_offset = java_lang_String::hc_offset_offset * x + header;
2300 java_lang_String::count_offset = java_lang_String::offset_offset + sizeof (jint);
2301 java_lang_String::hash_offset = java_lang_String::count_offset + sizeof (jint);
2303 // Do the Class Class
2304 java_lang_Class::klass_offset = java_lang_Class::hc_klass_offset * x + header;
2305 java_lang_Class::array_klass_offset = java_lang_Class::hc_array_klass_offset * x + header;
2306 java_lang_Class::resolved_constructor_offset = java_lang_Class::hc_resolved_constructor_offset * x + header;
2308 // This is NOT an offset
2309 java_lang_Class::number_of_fake_oop_fields = java_lang_Class::hc_number_of_fake_oop_fields;
2311 // Throwable Class
2312 java_lang_Throwable::backtrace_offset = java_lang_Throwable::hc_backtrace_offset * x + header;
2313 java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header;
2314 java_lang_Throwable::cause_offset = java_lang_Throwable::hc_cause_offset * x + header;
2315 java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header;
2317 // java_lang_boxing_object
2318 java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset * x + header;
2320 // java_lang_ref_Reference:
2321 java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header;
2322 java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header;
2323 java_lang_ref_Reference::next_offset = java_lang_ref_Reference::hc_next_offset * x + header;
2324 java_lang_ref_Reference::discovered_offset = java_lang_ref_Reference::hc_discovered_offset * x + header;
2325 java_lang_ref_Reference::static_lock_offset = java_lang_ref_Reference::hc_static_lock_offset * x;
2326 java_lang_ref_Reference::static_pending_offset = java_lang_ref_Reference::hc_static_pending_offset * x;
2327 // Artificial fields for java_lang_ref_Reference
2328 // The first field is for the discovered field added in 1.4
2329 java_lang_ref_Reference::number_of_fake_oop_fields = 1;
2331 // java_lang_ref_SoftReference Class
2332 java_lang_ref_SoftReference::timestamp_offset = java_lang_ref_SoftReference::hc_timestamp_offset * x + header;
2333 // Don't multiply static fields because they are always in wordSize units
2334 java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x;
2336 // java_lang_ClassLoader
2337 java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header;
2339 // java_lang_System
2340 java_lang_System::static_in_offset = java_lang_System::hc_static_in_offset * x;
2341 java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x;
2342 java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x;
2344 // java_lang_StackTraceElement
2345 java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset * x + header;
2346 java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header;
2347 java_lang_StackTraceElement::fileName_offset = java_lang_StackTraceElement::hc_fileName_offset * x + header;
2348 java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header;
2349 java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header;
2350 java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header;
2351 java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header;
2352 java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header;
2353 java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header;
2355 }
2358 // Compute non-hard-coded field offsets of all the classes in this file
2359 void JavaClasses::compute_offsets() {
2361 java_lang_Class::compute_offsets();
2362 java_lang_System::compute_offsets();
2363 java_lang_Thread::compute_offsets();
2364 java_lang_ThreadGroup::compute_offsets();
2365 java_security_AccessControlContext::compute_offsets();
2366 // Initialize reflection classes. The layouts of these classes
2367 // changed with the new reflection implementation in JDK 1.4, and
2368 // since the Universe doesn't know what JDK version it is until this
2369 // point we defer computation of these offsets until now.
2370 java_lang_reflect_AccessibleObject::compute_offsets();
2371 java_lang_reflect_Method::compute_offsets();
2372 java_lang_reflect_Constructor::compute_offsets();
2373 java_lang_reflect_Field::compute_offsets();
2374 if (JDK_Version::is_gte_jdk14x_version()) {
2375 java_nio_Buffer::compute_offsets();
2376 }
2377 if (JDK_Version::is_gte_jdk15x_version()) {
2378 sun_reflect_ConstantPool::compute_offsets();
2379 sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets();
2380 }
2381 sun_misc_AtomicLongCSImpl::compute_offsets();
2382 }
2384 #ifndef PRODUCT
2386 // These functions exist to assert the validity of hard-coded field offsets to guard
2387 // against changes in the class files
2389 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
2390 EXCEPTION_MARK;
2391 fieldDescriptor fd;
2392 symbolHandle klass_sym = oopFactory::new_symbol_handle(klass_name, CATCH);
2393 klassOop k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
2394 instanceKlassHandle h_klass (THREAD, k);
2395 //instanceKlassHandle h_klass(klass);
2396 symbolHandle f_name = oopFactory::new_symbol_handle(field_name, CATCH);
2397 symbolHandle f_sig = oopFactory::new_symbol_handle(field_sig, CATCH);
2398 if (!h_klass->find_local_field(f_name(), f_sig(), &fd)) {
2399 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
2400 return false;
2401 }
2402 if (fd.is_static()) {
2403 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
2404 return false;
2405 }
2406 if (fd.offset() == hardcoded_offset ) {
2407 return true;
2408 } else {
2409 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
2410 klass_name, field_name, hardcoded_offset, fd.offset());
2411 return false;
2412 }
2413 }
2416 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
2417 EXCEPTION_MARK;
2418 fieldDescriptor fd;
2419 symbolHandle klass_sym = oopFactory::new_symbol_handle(klass_name, CATCH);
2420 klassOop k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
2421 instanceKlassHandle h_klass (THREAD, k);
2422 symbolHandle f_name = oopFactory::new_symbol_handle(field_name, CATCH);
2423 symbolHandle f_sig = oopFactory::new_symbol_handle(field_sig, CATCH);
2424 if (!h_klass->find_local_field(f_name(), f_sig(), &fd)) {
2425 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
2426 return false;
2427 }
2428 if (!fd.is_static()) {
2429 tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name);
2430 return false;
2431 }
2432 if (fd.offset() == hardcoded_offset + h_klass->offset_of_static_fields()) {
2433 return true;
2434 } else {
2435 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());
2436 return false;
2437 }
2438 }
2441 // Check the hard-coded field offsets of all the classes in this file
2443 void JavaClasses::check_offsets() {
2444 bool valid = true;
2446 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
2447 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
2449 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
2450 valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig)
2452 // java.lang.String
2454 CHECK_OFFSET("java/lang/String", java_lang_String, value, "[C");
2455 CHECK_OFFSET("java/lang/String", java_lang_String, offset, "I");
2456 CHECK_OFFSET("java/lang/String", java_lang_String, count, "I");
2457 CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I");
2459 // java.lang.Class
2461 // Fake fields
2462 // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked
2463 // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked
2464 // CHECK_OFFSET("java/lang/Class", java_lang_Class, resolved_constructor); // %%% this needs to be checked
2466 // java.lang.Throwable
2468 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;");
2469 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;");
2470 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, cause, "Ljava/lang/Throwable;");
2471 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;");
2473 // Boxed primitive objects (java_lang_boxing_object)
2475 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
2476 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
2477 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
2478 CHECK_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
2479 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
2480 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
2481 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
2482 CHECK_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
2484 // java.lang.ClassLoader
2486 CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent, "Ljava/lang/ClassLoader;");
2488 // java.lang.System
2490 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, in, "Ljava/io/InputStream;");
2491 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;");
2492 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;");
2494 // java.lang.StackTraceElement
2496 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;");
2497 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;");
2498 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, fileName, "Ljava/lang/String;");
2499 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I");
2501 // java.lang.ref.Reference
2503 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
2504 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
2505 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
2506 // Fake field
2507 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
2508 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, lock, "Ljava/lang/ref/Reference$Lock;");
2509 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, pending, "Ljava/lang/ref/Reference;");
2511 // java.lang.ref.SoftReference
2513 CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J");
2514 CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J");
2516 // java.lang.AssertionStatusDirectives
2517 //
2518 // The CheckAssertionStatusDirectives boolean can be removed from here and
2519 // globals.hpp after the AssertionStatusDirectives class has been integrated
2520 // into merlin "for some time." Without it, the vm will fail with early
2521 // merlin builds.
2523 if (CheckAssertionStatusDirectives && JDK_Version::is_gte_jdk14x_version()) {
2524 const char* nm = "java/lang/AssertionStatusDirectives";
2525 const char* sig = "[Ljava/lang/String;";
2526 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig);
2527 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z");
2528 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig);
2529 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z");
2530 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z");
2531 }
2533 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
2534 }
2536 #endif // PRODUCT
2538 void javaClasses_init() {
2539 JavaClasses::compute_offsets();
2540 JavaClasses::check_offsets();
2541 FilteredFieldsMap::initialize(); // must be done after computing offsets.
2542 }