1 /*
2 * Copyright 1997-2009 Sun Microsystems, Inc. All Rights Reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24
25 # include "incls/_precompiled.incl"
26 # include "incls/_javaClasses.cpp.incl"
27
28 static bool find_field(instanceKlass* ik,
29 symbolOop name_symbol, symbolOop signature_symbol,
30 fieldDescriptor* fd,
31 bool allow_super = false) {
32 if (allow_super)
33 return ik->find_field(name_symbol, signature_symbol, fd) != NULL;
34 else
35 return ik->find_local_field(name_symbol, signature_symbol, fd);
36 }
37
38 // Helpful routine for computing field offsets at run time rather than hardcoding them
39 static void
40 compute_offset(int &dest_offset,
41 klassOop klass_oop, symbolOop name_symbol, symbolOop signature_symbol,
42 bool allow_super = false) {
43 fieldDescriptor fd;
44 instanceKlass* ik = instanceKlass::cast(klass_oop);
45 if (!find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) {
46 ResourceMark rm;
47 tty->print_cr("Invalid layout of %s at %s", ik->external_name(), name_symbol->as_C_string());
48 fatal("Invalid layout of preloaded class");
49 }
50 dest_offset = fd.offset();
51 }
52
53 // Same as above but for "optional" offsets that might not be present in certain JDK versions
54 static void
55 compute_optional_offset(int& dest_offset,
56 klassOop klass_oop, symbolOop name_symbol, symbolOop signature_symbol,
57 bool allow_super = false) {
58 fieldDescriptor fd;
59 instanceKlass* ik = instanceKlass::cast(klass_oop);
60 if (find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) {
61 dest_offset = fd.offset();
62 }
63 }
64
65
66 Handle java_lang_String::basic_create(int length, bool tenured, TRAPS) {
67 // Create the String object first, so there's a chance that the String
68 // and the char array it points to end up in the same cache line.
69 oop obj;
70 if (tenured) {
71 obj = instanceKlass::cast(SystemDictionary::string_klass())->allocate_permanent_instance(CHECK_NH);
72 } else {
73 obj = instanceKlass::cast(SystemDictionary::string_klass())->allocate_instance(CHECK_NH);
74 }
75
76 // Create the char array. The String object must be handlized here
77 // because GC can happen as a result of the allocation attempt.
78 Handle h_obj(THREAD, obj);
79 typeArrayOop buffer;
80 if (tenured) {
81 buffer = oopFactory::new_permanent_charArray(length, CHECK_NH);
82 } else {
83 buffer = oopFactory::new_charArray(length, CHECK_NH);
84 }
85
86 // Point the String at the char array
87 obj = h_obj();
88 set_value(obj, buffer);
89 // No need to zero the offset, allocation zero'ed the entire String object
90 assert(offset(obj) == 0, "initial String offset should be zero");
91 //set_offset(obj, 0);
92 set_count(obj, length);
93
94 return h_obj;
95 }
96
97 Handle java_lang_String::basic_create_from_unicode(jchar* unicode, int length, bool tenured, TRAPS) {
98 Handle h_obj = basic_create(length, tenured, CHECK_NH);
99 typeArrayOop buffer = value(h_obj());
100 for (int index = 0; index < length; index++) {
101 buffer->char_at_put(index, unicode[index]);
102 }
103 return h_obj;
104 }
105
106 Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) {
107 return basic_create_from_unicode(unicode, length, false, CHECK_NH);
108 }
109
110 Handle java_lang_String::create_tenured_from_unicode(jchar* unicode, int length, TRAPS) {
111 return basic_create_from_unicode(unicode, length, true, CHECK_NH);
112 }
113
114 oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) {
115 Handle h_obj = basic_create_from_unicode(unicode, length, false, CHECK_0);
116 return h_obj();
117 }
118
119 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
120 if (utf8_str == NULL) {
121 return Handle();
122 }
123 int length = UTF8::unicode_length(utf8_str);
124 Handle h_obj = basic_create(length, false, CHECK_NH);
125 if (length > 0) {
126 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
127 }
128 return h_obj;
129 }
130
131 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
132 Handle h_obj = create_from_str(utf8_str, CHECK_0);
133 return h_obj();
134 }
135
136 Handle java_lang_String::create_from_symbol(symbolHandle symbol, TRAPS) {
137 int length = UTF8::unicode_length((char*)symbol->bytes(), symbol->utf8_length());
138 Handle h_obj = basic_create(length, false, CHECK_NH);
139 if (length > 0) {
140 UTF8::convert_to_unicode((char*)symbol->bytes(), value(h_obj())->char_at_addr(0), length);
141 }
142 return h_obj;
143 }
144
145 // Converts a C string to a Java String based on current encoding
146 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
147 assert(str != NULL, "bad arguments");
148
149 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *);
150 static to_java_string_fn_t _to_java_string_fn = NULL;
151
152 if (_to_java_string_fn == NULL) {
153 void *lib_handle = os::native_java_library();
154 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, hpi::dll_lookup(lib_handle, "NewStringPlatform"));
155 if (_to_java_string_fn == NULL) {
156 fatal("NewStringPlatform missing");
157 }
158 }
159
160 jstring js = NULL;
161 { JavaThread* thread = (JavaThread*)THREAD;
162 assert(thread->is_Java_thread(), "must be java thread");
163 HandleMark hm(thread);
164 ThreadToNativeFromVM ttn(thread);
165 js = (_to_java_string_fn)(thread->jni_environment(), str);
166 }
167 return Handle(THREAD, JNIHandles::resolve(js));
168 }
169
170 // Converts a Java String to a native C string that can be used for
171 // native OS calls.
172 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
173
174 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
175 static to_platform_string_fn_t _to_platform_string_fn = NULL;
176
177 if (_to_platform_string_fn == NULL) {
178 void *lib_handle = os::native_java_library();
179 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, hpi::dll_lookup(lib_handle, "GetStringPlatformChars"));
180 if (_to_platform_string_fn == NULL) {
181 fatal("GetStringPlatformChars missing");
182 }
183 }
184
185 char *native_platform_string;
186 { JavaThread* thread = (JavaThread*)THREAD;
187 assert(thread->is_Java_thread(), "must be java thread");
188 JNIEnv *env = thread->jni_environment();
189 jstring js = (jstring) JNIHandles::make_local(env, java_string());
190 bool is_copy;
191 HandleMark hm(thread);
192 ThreadToNativeFromVM ttn(thread);
193 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
194 assert(is_copy == JNI_TRUE, "is_copy value changed");
195 JNIHandles::destroy_local(js);
196 }
197 return native_platform_string;
198 }
199
200 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) {
201 oop obj = java_string();
202 // Typical usage is to convert all '/' to '.' in string.
203 typeArrayOop value = java_lang_String::value(obj);
204 int offset = java_lang_String::offset(obj);
205 int length = java_lang_String::length(obj);
206
207 // First check if any from_char exist
208 int index; // Declared outside, used later
209 for (index = 0; index < length; index++) {
210 if (value->char_at(index + offset) == from_char) {
211 break;
212 }
213 }
214 if (index == length) {
215 // No from_char, so do not copy.
216 return java_string;
217 }
218
219 // Create new UNICODE buffer. Must handlize value because GC
220 // may happen during String and char array creation.
221 typeArrayHandle h_value(THREAD, value);
222 Handle string = basic_create(length, false, CHECK_NH);
223
224 typeArrayOop from_buffer = h_value();
225 typeArrayOop to_buffer = java_lang_String::value(string());
226
227 // Copy contents
228 for (index = 0; index < length; index++) {
229 jchar c = from_buffer->char_at(index + offset);
230 if (c == from_char) {
231 c = to_char;
232 }
233 to_buffer->char_at_put(index, c);
234 }
235 return string;
236 }
237
238 jchar* java_lang_String::as_unicode_string(oop java_string, int& length) {
239 typeArrayOop value = java_lang_String::value(java_string);
240 int offset = java_lang_String::offset(java_string);
241 length = java_lang_String::length(java_string);
242
243 jchar* result = NEW_RESOURCE_ARRAY(jchar, length);
244 for (int index = 0; index < length; index++) {
245 result[index] = value->char_at(index + offset);
246 }
247 return result;
248 }
249
250 symbolHandle java_lang_String::as_symbol(Handle java_string, TRAPS) {
251 oop obj = java_string();
252 typeArrayOop value = java_lang_String::value(obj);
253 int offset = java_lang_String::offset(obj);
254 int length = java_lang_String::length(obj);
255 jchar* base = value->char_at_addr(offset);
256 symbolOop sym = SymbolTable::lookup_unicode(base, length, THREAD);
257 return symbolHandle(THREAD, sym);
258 }
259
260 symbolOop java_lang_String::as_symbol_or_null(oop java_string) {
261 typeArrayOop value = java_lang_String::value(java_string);
262 int offset = java_lang_String::offset(java_string);
263 int length = java_lang_String::length(java_string);
264 jchar* base = value->char_at_addr(offset);
265 return SymbolTable::probe_unicode(base, length);
266 }
267
268
269 int java_lang_String::utf8_length(oop java_string) {
270 typeArrayOop value = java_lang_String::value(java_string);
271 int offset = java_lang_String::offset(java_string);
272 int length = java_lang_String::length(java_string);
273 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
274 return UNICODE::utf8_length(position, length);
275 }
276
277 char* java_lang_String::as_utf8_string(oop java_string) {
278 typeArrayOop value = java_lang_String::value(java_string);
279 int offset = java_lang_String::offset(java_string);
280 int length = java_lang_String::length(java_string);
281 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
282 return UNICODE::as_utf8(position, length);
283 }
284
285 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
286 typeArrayOop value = java_lang_String::value(java_string);
287 int offset = java_lang_String::offset(java_string);
288 int length = java_lang_String::length(java_string);
289 assert(start + len <= length, "just checking");
290 jchar* position = value->char_at_addr(offset + start);
291 return UNICODE::as_utf8(position, len);
292 }
293
294 bool java_lang_String::equals(oop java_string, jchar* chars, int len) {
295 assert(SharedSkipVerify ||
296 java_string->klass() == SystemDictionary::string_klass(),
297 "must be java_string");
298 typeArrayOop value = java_lang_String::value(java_string);
299 int offset = java_lang_String::offset(java_string);
300 int length = java_lang_String::length(java_string);
301 if (length != len) {
302 return false;
303 }
304 for (int i = 0; i < len; i++) {
305 if (value->char_at(i + offset) != chars[i]) {
306 return false;
307 }
308 }
309 return true;
310 }
311
312 void java_lang_String::print(Handle java_string, outputStream* st) {
313 oop obj = java_string();
314 assert(obj->klass() == SystemDictionary::string_klass(), "must be java_string");
315 typeArrayOop value = java_lang_String::value(obj);
316 int offset = java_lang_String::offset(obj);
317 int length = java_lang_String::length(obj);
318
319 int end = MIN2(length, 100);
320 if (value == NULL) {
321 // This can happen if, e.g., printing a String
322 // object before its initializer has been called
323 st->print_cr("NULL");
324 } else {
325 st->print("\"");
326 for (int index = 0; index < length; index++) {
327 st->print("%c", value->char_at(index + offset));
328 }
329 st->print("\"");
330 }
331 }
332
333
334 oop java_lang_Class::create_mirror(KlassHandle k, TRAPS) {
335 assert(k->java_mirror() == NULL, "should only assign mirror once");
336 // Use this moment of initialization to cache modifier_flags also,
337 // to support Class.getModifiers(). Instance classes recalculate
338 // the cached flags after the class file is parsed, but before the
339 // class is put into the system dictionary.
340 int computed_modifiers = k->compute_modifier_flags(CHECK_0);
341 k->set_modifier_flags(computed_modifiers);
342 if (SystemDictionary::class_klass_loaded()) {
343 // Allocate mirror (java.lang.Class instance)
344 Handle mirror = instanceKlass::cast(SystemDictionary::class_klass())->allocate_permanent_instance(CHECK_0);
345 // Setup indirections
346 mirror->obj_field_put(klass_offset, k());
347 k->set_java_mirror(mirror());
348 // It might also have a component mirror. This mirror must already exist.
349 if (k->oop_is_javaArray()) {
350 Handle comp_mirror;
351 if (k->oop_is_typeArray()) {
352 BasicType type = typeArrayKlass::cast(k->as_klassOop())->element_type();
353 comp_mirror = Universe::java_mirror(type);
354 assert(comp_mirror.not_null(), "must have primitive mirror");
355 } else if (k->oop_is_objArray()) {
356 klassOop element_klass = objArrayKlass::cast(k->as_klassOop())->element_klass();
357 if (element_klass != NULL
358 && (Klass::cast(element_klass)->oop_is_instance() ||
359 Klass::cast(element_klass)->oop_is_javaArray())) {
360 comp_mirror = Klass::cast(element_klass)->java_mirror();
361 assert(comp_mirror.not_null(), "must have element mirror");
362 }
363 // else some object array internal to the VM, like systemObjArrayKlassObj
364 }
365 if (comp_mirror.not_null()) {
366 // Two-way link between the array klass and its component mirror:
367 arrayKlass::cast(k->as_klassOop())->set_component_mirror(comp_mirror());
368 set_array_klass(comp_mirror(), k->as_klassOop());
369 }
370 }
371 return mirror();
372 } else {
373 return NULL;
374 }
375 }
376
377
378 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
379 // This should be improved by adding a field at the Java level or by
380 // introducing a new VM klass (see comment in ClassFileParser)
381 oop java_class = instanceKlass::cast(SystemDictionary::class_klass())->allocate_permanent_instance(CHECK_0);
382 if (type != T_VOID) {
383 klassOop aklass = Universe::typeArrayKlassObj(type);
384 assert(aklass != NULL, "correct bootstrap");
385 set_array_klass(java_class, aklass);
386 }
387 return java_class;
388 }
389
390
391 klassOop java_lang_Class::as_klassOop(oop java_class) {
392 //%note memory_2
393 klassOop k = klassOop(java_class->obj_field(klass_offset));
394 assert(k == NULL || k->is_klass(), "type check");
395 return k;
396 }
397
398
399 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
400 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
401 symbolOop name = NULL;
402 bool is_instance = false;
403 if (is_primitive(java_class)) {
404 name = vmSymbols::type_signature(primitive_type(java_class));
405 } else {
406 klassOop k = as_klassOop(java_class);
407 is_instance = Klass::cast(k)->oop_is_instance();
408 name = Klass::cast(k)->name();
409 }
410 if (name == NULL) {
411 st->print("<null>");
412 return;
413 }
414 if (is_instance) st->print("L");
415 st->write((char*) name->base(), (int) name->utf8_length());
416 if (is_instance) st->print(";");
417 }
418
419 symbolOop java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) {
420 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
421 symbolOop name = NULL;
422 if (is_primitive(java_class)) {
423 return vmSymbols::type_signature(primitive_type(java_class));
424 } else {
425 klassOop k = as_klassOop(java_class);
426 if (!Klass::cast(k)->oop_is_instance()) {
427 return Klass::cast(k)->name();
428 } else {
429 ResourceMark rm;
430 const char* sigstr = Klass::cast(k)->signature_name();
431 int siglen = (int) strlen(sigstr);
432 if (!intern_if_not_found)
433 return SymbolTable::probe(sigstr, siglen);
434 else
435 return oopFactory::new_symbol(sigstr, siglen, THREAD);
436 }
437 }
438 }
439
440
441 klassOop java_lang_Class::array_klass(oop java_class) {
442 klassOop k = klassOop(java_class->obj_field(array_klass_offset));
443 assert(k == NULL || k->is_klass() && Klass::cast(k)->oop_is_javaArray(), "should be array klass");
444 return k;
445 }
446
447
448 void java_lang_Class::set_array_klass(oop java_class, klassOop klass) {
449 assert(klass->is_klass() && Klass::cast(klass)->oop_is_javaArray(), "should be array klass");
450 java_class->obj_field_put(array_klass_offset, klass);
451 }
452
453
454 methodOop java_lang_Class::resolved_constructor(oop java_class) {
455 oop constructor = java_class->obj_field(resolved_constructor_offset);
456 assert(constructor == NULL || constructor->is_method(), "should be method");
457 return methodOop(constructor);
458 }
459
460
461 void java_lang_Class::set_resolved_constructor(oop java_class, methodOop constructor) {
462 assert(constructor->is_method(), "should be method");
463 java_class->obj_field_put(resolved_constructor_offset, constructor);
464 }
465
466
467 bool java_lang_Class::is_primitive(oop java_class) {
468 // should assert:
469 //assert(java_lang_Class::is_instance(java_class), "must be a Class object");
470 klassOop k = klassOop(java_class->obj_field(klass_offset));
471 return k == NULL;
472 }
473
474
475 BasicType java_lang_Class::primitive_type(oop java_class) {
476 assert(java_lang_Class::is_primitive(java_class), "just checking");
477 klassOop ak = klassOop(java_class->obj_field(array_klass_offset));
478 BasicType type = T_VOID;
479 if (ak != NULL) {
480 // Note: create_basic_type_mirror above initializes ak to a non-null value.
481 type = arrayKlass::cast(ak)->element_type();
482 } else {
483 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
484 }
485 assert(Universe::java_mirror(type) == java_class, "must be consistent");
486 return type;
487 }
488
489 BasicType java_lang_Class::as_BasicType(oop java_class, klassOop* reference_klass) {
490 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
491 if (is_primitive(java_class)) {
492 if (reference_klass != NULL)
493 (*reference_klass) = NULL;
494 return primitive_type(java_class);
495 } else {
496 if (reference_klass != NULL)
497 (*reference_klass) = as_klassOop(java_class);
498 return T_OBJECT;
499 }
500 }
501
502
503 oop java_lang_Class::primitive_mirror(BasicType t) {
504 oop mirror = Universe::java_mirror(t);
505 assert(mirror != NULL && mirror->is_a(SystemDictionary::class_klass()), "must be a Class");
506 assert(java_lang_Class::is_primitive(mirror), "must be primitive");
507 return mirror;
508 }
509
510 bool java_lang_Class::offsets_computed = false;
511 int java_lang_Class::classRedefinedCount_offset = -1;
512 int java_lang_Class::parallelCapable_offset = -1;
513
514 void java_lang_Class::compute_offsets() {
515 assert(!offsets_computed, "offsets should be initialized only once");
516 offsets_computed = true;
517
518 klassOop k = SystemDictionary::class_klass();
519 // The classRedefinedCount field is only present starting in 1.5,
520 // so don't go fatal.
521 compute_optional_offset(classRedefinedCount_offset,
522 k, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature());
523
524 // The field indicating parallelCapable (parallelLockMap) is only present starting in 7,
525 klassOop k1 = SystemDictionary::classloader_klass();
526 compute_optional_offset(parallelCapable_offset,
527 k1, vmSymbols::parallelCapable_name(), vmSymbols::concurrenthashmap_signature());
528 }
529
530 // For class loader classes, parallelCapable defined
531 // based on non-null field
532 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
533 bool java_lang_Class::parallelCapable(oop class_loader) {
534 if (!JDK_Version::is_gte_jdk17x_version()
535 || parallelCapable_offset == -1) {
536 // Default for backward compatibility is false
537 return false;
538 }
539 return (class_loader->obj_field(parallelCapable_offset) != NULL);
540 }
541
542 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
543 if (!JDK_Version::is_gte_jdk15x_version()
544 || classRedefinedCount_offset == -1) {
545 // The classRedefinedCount field is only present starting in 1.5.
546 // If we don't have an offset for it then just return -1 as a marker.
547 return -1;
548 }
549
550 return the_class_mirror->int_field(classRedefinedCount_offset);
551 }
552
553 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
554 if (!JDK_Version::is_gte_jdk15x_version()
555 || classRedefinedCount_offset == -1) {
556 // The classRedefinedCount field is only present starting in 1.5.
557 // If we don't have an offset for it then nothing to set.
558 return;
559 }
560
561 the_class_mirror->int_field_put(classRedefinedCount_offset, value);
562 }
563
564
565 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
566 // platform thread structure, and a eetop offset which was used for thread
567 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
568 // merged, so in the HotSpot VM we just use the eetop field for the thread
569 // instead of the privateInfo_offset.
570 //
571 // Note: The stackSize field is only present starting in 1.4.
572
573 int java_lang_Thread::_name_offset = 0;
574 int java_lang_Thread::_group_offset = 0;
575 int java_lang_Thread::_contextClassLoader_offset = 0;
576 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
577 int java_lang_Thread::_priority_offset = 0;
578 int java_lang_Thread::_eetop_offset = 0;
579 int java_lang_Thread::_daemon_offset = 0;
580 int java_lang_Thread::_stillborn_offset = 0;
581 int java_lang_Thread::_stackSize_offset = 0;
582 int java_lang_Thread::_tid_offset = 0;
583 int java_lang_Thread::_thread_status_offset = 0;
584 int java_lang_Thread::_park_blocker_offset = 0;
585 int java_lang_Thread::_park_event_offset = 0 ;
586
587
588 void java_lang_Thread::compute_offsets() {
589 assert(_group_offset == 0, "offsets should be initialized only once");
590
591 klassOop k = SystemDictionary::thread_klass();
592 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::char_array_signature());
593 compute_offset(_group_offset, k, vmSymbols::group_name(), vmSymbols::threadgroup_signature());
594 compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature());
595 compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature());
596 compute_offset(_priority_offset, k, vmSymbols::priority_name(), vmSymbols::int_signature());
597 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
598 compute_offset(_eetop_offset, k, vmSymbols::eetop_name(), vmSymbols::long_signature());
599 compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature());
600 // The stackSize field is only present starting in 1.4, so don't go fatal.
601 compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature());
602 // The tid and thread_status fields are only present starting in 1.5, so don't go fatal.
603 compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature());
604 compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature());
605 // The parkBlocker field is only present starting in 1.6, so don't go fatal.
606 compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature());
607 compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(),
608 vmSymbols::long_signature());
609 }
610
611
612 JavaThread* java_lang_Thread::thread(oop java_thread) {
613 return (JavaThread*)java_thread->address_field(_eetop_offset);
614 }
615
616
617 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
618 java_thread->address_field_put(_eetop_offset, (address)thread);
619 }
620
621
622 typeArrayOop java_lang_Thread::name(oop java_thread) {
623 oop name = java_thread->obj_field(_name_offset);
624 assert(name == NULL || (name->is_typeArray() && typeArrayKlass::cast(name->klass())->element_type() == T_CHAR), "just checking");
625 return typeArrayOop(name);
626 }
627
628
629 void java_lang_Thread::set_name(oop java_thread, typeArrayOop name) {
630 assert(java_thread->obj_field(_name_offset) == NULL, "name should be NULL");
631 java_thread->obj_field_put(_name_offset, name);
632 }
633
634
635 ThreadPriority java_lang_Thread::priority(oop java_thread) {
636 return (ThreadPriority)java_thread->int_field(_priority_offset);
637 }
638
639
640 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
641 java_thread->int_field_put(_priority_offset, priority);
642 }
643
644
645 oop java_lang_Thread::threadGroup(oop java_thread) {
646 return java_thread->obj_field(_group_offset);
647 }
648
649
650 bool java_lang_Thread::is_stillborn(oop java_thread) {
651 return java_thread->bool_field(_stillborn_offset) != 0;
652 }
653
654
655 // We never have reason to turn the stillborn bit off
656 void java_lang_Thread::set_stillborn(oop java_thread) {
657 java_thread->bool_field_put(_stillborn_offset, true);
658 }
659
660
661 bool java_lang_Thread::is_alive(oop java_thread) {
662 JavaThread* thr = java_lang_Thread::thread(java_thread);
663 return (thr != NULL);
664 }
665
666
667 bool java_lang_Thread::is_daemon(oop java_thread) {
668 return java_thread->bool_field(_daemon_offset) != 0;
669 }
670
671
672 void java_lang_Thread::set_daemon(oop java_thread) {
673 java_thread->bool_field_put(_daemon_offset, true);
674 }
675
676 oop java_lang_Thread::context_class_loader(oop java_thread) {
677 return java_thread->obj_field(_contextClassLoader_offset);
678 }
679
680 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
681 return java_thread->obj_field(_inheritedAccessControlContext_offset);
682 }
683
684
685 jlong java_lang_Thread::stackSize(oop java_thread) {
686 // The stackSize field is only present starting in 1.4
687 if (_stackSize_offset > 0) {
688 assert(JDK_Version::is_gte_jdk14x_version(), "sanity check");
689 return java_thread->long_field(_stackSize_offset);
690 } else {
691 return 0;
692 }
693 }
694
695 // Write the thread status value to threadStatus field in java.lang.Thread java class.
696 void java_lang_Thread::set_thread_status(oop java_thread,
697 java_lang_Thread::ThreadStatus status) {
698 assert(JavaThread::current()->thread_state() == _thread_in_vm, "Java Thread is not running in vm");
699 // The threadStatus is only present starting in 1.5
700 if (_thread_status_offset > 0) {
701 java_thread->int_field_put(_thread_status_offset, status);
702 }
703 }
704
705 // Read thread status value from threadStatus field in java.lang.Thread java class.
706 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
707 assert(Thread::current()->is_VM_thread() ||
708 JavaThread::current()->thread_state() == _thread_in_vm,
709 "Java Thread is not running in vm");
710 // The threadStatus is only present starting in 1.5
711 if (_thread_status_offset > 0) {
712 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
713 } else {
714 // All we can easily figure out is if it is alive, but that is
715 // enough info for a valid unknown status.
716 // These aren't restricted to valid set ThreadStatus values, so
717 // use JVMTI values and cast.
718 JavaThread* thr = java_lang_Thread::thread(java_thread);
719 if (thr == NULL) {
720 // the thread hasn't run yet or is in the process of exiting
721 return NEW;
722 }
723 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE;
724 }
725 }
726
727
728 jlong java_lang_Thread::thread_id(oop java_thread) {
729 // The thread ID field is only present starting in 1.5
730 if (_tid_offset > 0) {
731 return java_thread->long_field(_tid_offset);
732 } else {
733 return 0;
734 }
735 }
736
737 oop java_lang_Thread::park_blocker(oop java_thread) {
738 assert(JDK_Version::current().supports_thread_park_blocker() &&
739 _park_blocker_offset != 0, "Must support parkBlocker field");
740
741 if (_park_blocker_offset > 0) {
742 return java_thread->obj_field(_park_blocker_offset);
743 }
744
745 return NULL;
746 }
747
748 jlong java_lang_Thread::park_event(oop java_thread) {
749 if (_park_event_offset > 0) {
750 return java_thread->long_field(_park_event_offset);
751 }
752 return 0;
753 }
754
755 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) {
756 if (_park_event_offset > 0) {
757 java_thread->long_field_put(_park_event_offset, ptr);
758 return true;
759 }
760 return false;
761 }
762
763
764 const char* java_lang_Thread::thread_status_name(oop java_thread) {
765 assert(JDK_Version::is_gte_jdk15x_version() && _thread_status_offset != 0, "Must have thread status");
766 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
767 switch (status) {
768 case NEW : return "NEW";
769 case RUNNABLE : return "RUNNABLE";
770 case SLEEPING : return "TIMED_WAITING (sleeping)";
771 case IN_OBJECT_WAIT : return "WAITING (on object monitor)";
772 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
773 case PARKED : return "WAITING (parking)";
774 case PARKED_TIMED : return "TIMED_WAITING (parking)";
775 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
776 case TERMINATED : return "TERMINATED";
777 default : return "UNKNOWN";
778 };
779 }
780 int java_lang_ThreadGroup::_parent_offset = 0;
781 int java_lang_ThreadGroup::_name_offset = 0;
782 int java_lang_ThreadGroup::_threads_offset = 0;
783 int java_lang_ThreadGroup::_groups_offset = 0;
784 int java_lang_ThreadGroup::_maxPriority_offset = 0;
785 int java_lang_ThreadGroup::_destroyed_offset = 0;
786 int java_lang_ThreadGroup::_daemon_offset = 0;
787 int java_lang_ThreadGroup::_vmAllowSuspension_offset = 0;
788 int java_lang_ThreadGroup::_nthreads_offset = 0;
789 int java_lang_ThreadGroup::_ngroups_offset = 0;
790
791 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
792 assert(java_thread_group->is_oop(), "thread group must be oop");
793 return java_thread_group->obj_field(_parent_offset);
794 }
795
796 // ("name as oop" accessor is not necessary)
797
798 typeArrayOop java_lang_ThreadGroup::name(oop java_thread_group) {
799 oop name = java_thread_group->obj_field(_name_offset);
800 // ThreadGroup.name can be null
801 return name == NULL ? (typeArrayOop)NULL : java_lang_String::value(name);
802 }
803
804 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
805 assert(java_thread_group->is_oop(), "thread group must be oop");
806 return java_thread_group->int_field(_nthreads_offset);
807 }
808
809 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
810 oop threads = java_thread_group->obj_field(_threads_offset);
811 assert(threads != NULL, "threadgroups should have threads");
812 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
813 return objArrayOop(threads);
814 }
815
816 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
817 assert(java_thread_group->is_oop(), "thread group must be oop");
818 return java_thread_group->int_field(_ngroups_offset);
819 }
820
821 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
822 oop groups = java_thread_group->obj_field(_groups_offset);
823 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
824 return objArrayOop(groups);
825 }
826
827 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
828 assert(java_thread_group->is_oop(), "thread group must be oop");
829 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
830 }
831
832 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
833 assert(java_thread_group->is_oop(), "thread group must be oop");
834 return java_thread_group->bool_field(_destroyed_offset) != 0;
835 }
836
837 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
838 assert(java_thread_group->is_oop(), "thread group must be oop");
839 return java_thread_group->bool_field(_daemon_offset) != 0;
840 }
841
842 bool java_lang_ThreadGroup::is_vmAllowSuspension(oop java_thread_group) {
843 assert(java_thread_group->is_oop(), "thread group must be oop");
844 return java_thread_group->bool_field(_vmAllowSuspension_offset) != 0;
845 }
846
847 void java_lang_ThreadGroup::compute_offsets() {
848 assert(_parent_offset == 0, "offsets should be initialized only once");
849
850 klassOop k = SystemDictionary::threadGroup_klass();
851
852 compute_offset(_parent_offset, k, vmSymbols::parent_name(), vmSymbols::threadgroup_signature());
853 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
854 compute_offset(_threads_offset, k, vmSymbols::threads_name(), vmSymbols::thread_array_signature());
855 compute_offset(_groups_offset, k, vmSymbols::groups_name(), vmSymbols::threadgroup_array_signature());
856 compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature());
857 compute_offset(_destroyed_offset, k, vmSymbols::destroyed_name(), vmSymbols::bool_signature());
858 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
859 compute_offset(_vmAllowSuspension_offset, k, vmSymbols::vmAllowSuspension_name(), vmSymbols::bool_signature());
860 compute_offset(_nthreads_offset, k, vmSymbols::nthreads_name(), vmSymbols::int_signature());
861 compute_offset(_ngroups_offset, k, vmSymbols::ngroups_name(), vmSymbols::int_signature());
862 }
863
864 oop java_lang_Throwable::backtrace(oop throwable) {
865 return throwable->obj_field_acquire(backtrace_offset);
866 }
867
868
869 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
870 throwable->release_obj_field_put(backtrace_offset, value);
871 }
872
873
874 oop java_lang_Throwable::message(oop throwable) {
875 return throwable->obj_field(detailMessage_offset);
876 }
877
878
879 oop java_lang_Throwable::message(Handle throwable) {
880 return throwable->obj_field(detailMessage_offset);
881 }
882
883
884 void java_lang_Throwable::set_message(oop throwable, oop value) {
885 throwable->obj_field_put(detailMessage_offset, value);
886 }
887
888
889 void java_lang_Throwable::clear_stacktrace(oop throwable) {
890 assert(JDK_Version::is_gte_jdk14x_version(), "should only be called in >= 1.4");
891 throwable->obj_field_put(stackTrace_offset, NULL);
892 }
893
894
895 void java_lang_Throwable::print(oop throwable, outputStream* st) {
896 ResourceMark rm;
897 klassOop k = throwable->klass();
898 assert(k != NULL, "just checking");
899 st->print("%s", instanceKlass::cast(k)->external_name());
900 oop msg = message(throwable);
901 if (msg != NULL) {
902 st->print(": %s", java_lang_String::as_utf8_string(msg));
903 }
904 }
905
906
907 void java_lang_Throwable::print(Handle throwable, outputStream* st) {
908 ResourceMark rm;
909 klassOop k = throwable->klass();
910 assert(k != NULL, "just checking");
911 st->print("%s", instanceKlass::cast(k)->external_name());
912 oop msg = message(throwable);
913 if (msg != NULL) {
914 st->print(": %s", java_lang_String::as_utf8_string(msg));
915 }
916 }
917
918 // Print stack trace element to resource allocated buffer
919 char* java_lang_Throwable::print_stack_element_to_buffer(methodOop method, int bci) {
920 // Get strings and string lengths
921 instanceKlass* klass = instanceKlass::cast(method->method_holder());
922 const char* klass_name = klass->external_name();
923 int buf_len = (int)strlen(klass_name);
924 char* source_file_name;
925 if (klass->source_file_name() == NULL) {
926 source_file_name = NULL;
927 } else {
928 source_file_name = klass->source_file_name()->as_C_string();
929 buf_len += (int)strlen(source_file_name);
930 }
931 char* method_name = method->name()->as_C_string();
932 buf_len += (int)strlen(method_name);
933
934 // Allocate temporary buffer with extra space for formatting and line number
935 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
936
937 // Print stack trace line in buffer
938 sprintf(buf, "\tat %s.%s", klass_name, method_name);
939 if (method->is_native()) {
940 strcat(buf, "(Native Method)");
941 } else {
942 int line_number = method->line_number_from_bci(bci);
943 if (source_file_name != NULL && (line_number != -1)) {
944 // Sourcename and linenumber
945 sprintf(buf + (int)strlen(buf), "(%s:%d)", source_file_name, line_number);
946 } else if (source_file_name != NULL) {
947 // Just sourcename
948 sprintf(buf + (int)strlen(buf), "(%s)", source_file_name);
949 } else {
950 // Neither soucename and linenumber
951 sprintf(buf + (int)strlen(buf), "(Unknown Source)");
952 }
953 nmethod* nm = method->code();
954 if (WizardMode && nm != NULL) {
955 sprintf(buf + (int)strlen(buf), "(nmethod " PTR_FORMAT ")", (intptr_t)nm);
956 }
957 }
958
959 return buf;
960 }
961
962
963 void java_lang_Throwable::print_stack_element(Handle stream, methodOop method, int bci) {
964 ResourceMark rm;
965 char* buf = print_stack_element_to_buffer(method, bci);
966 print_to_stream(stream, buf);
967 }
968
969 void java_lang_Throwable::print_stack_element(outputStream *st, methodOop method, int bci) {
970 ResourceMark rm;
971 char* buf = print_stack_element_to_buffer(method, bci);
972 st->print_cr("%s", buf);
973 }
974
975 void java_lang_Throwable::print_to_stream(Handle stream, const char* str) {
976 if (stream.is_null()) {
977 tty->print_cr("%s", str);
978 } else {
979 EXCEPTION_MARK;
980 JavaValue result(T_VOID);
981 Handle arg (THREAD, oopFactory::new_charArray(str, THREAD));
982 if (!HAS_PENDING_EXCEPTION) {
983 JavaCalls::call_virtual(&result,
984 stream,
985 KlassHandle(THREAD, stream->klass()),
986 vmSymbolHandles::println_name(),
987 vmSymbolHandles::char_array_void_signature(),
988 arg,
989 THREAD);
990 }
991 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
992 if (HAS_PENDING_EXCEPTION) CLEAR_PENDING_EXCEPTION;
993 }
994
995 }
996
997
998 const char* java_lang_Throwable::no_stack_trace_message() {
999 return "\t<<no stack trace available>>";
1000 }
1001
1002
1003 // Currently used only for exceptions occurring during startup
1004 void java_lang_Throwable::print_stack_trace(oop throwable, outputStream* st) {
1005 Thread *THREAD = Thread::current();
1006 Handle h_throwable(THREAD, throwable);
1007 while (h_throwable.not_null()) {
1008 objArrayHandle result (THREAD, objArrayOop(backtrace(h_throwable())));
1009 if (result.is_null()) {
1010 st->print_cr(no_stack_trace_message());
1011 return;
1012 }
1013
1014 while (result.not_null()) {
1015 objArrayHandle methods (THREAD,
1016 objArrayOop(result->obj_at(trace_methods_offset)));
1017 typeArrayHandle bcis (THREAD,
1018 typeArrayOop(result->obj_at(trace_bcis_offset)));
1019
1020 if (methods.is_null() || bcis.is_null()) {
1021 st->print_cr(no_stack_trace_message());
1022 return;
1023 }
1024
1025 int length = methods()->length();
1026 for (int index = 0; index < length; index++) {
1027 methodOop method = methodOop(methods()->obj_at(index));
1028 if (method == NULL) goto handle_cause;
1029 int bci = bcis->ushort_at(index);
1030 print_stack_element(st, method, bci);
1031 }
1032 result = objArrayHandle(THREAD, objArrayOop(result->obj_at(trace_next_offset)));
1033 }
1034 handle_cause:
1035 {
1036 EXCEPTION_MARK;
1037 JavaValue result(T_OBJECT);
1038 JavaCalls::call_virtual(&result,
1039 h_throwable,
1040 KlassHandle(THREAD, h_throwable->klass()),
1041 vmSymbolHandles::getCause_name(),
1042 vmSymbolHandles::void_throwable_signature(),
1043 THREAD);
1044 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
1045 if (HAS_PENDING_EXCEPTION) {
1046 CLEAR_PENDING_EXCEPTION;
1047 h_throwable = Handle();
1048 } else {
1049 h_throwable = Handle(THREAD, (oop) result.get_jobject());
1050 if (h_throwable.not_null()) {
1051 st->print("Caused by: ");
1052 print(h_throwable, st);
1053 st->cr();
1054 }
1055 }
1056 }
1057 }
1058 }
1059
1060
1061 void java_lang_Throwable::print_stack_trace(oop throwable, oop print_stream) {
1062 // Note: this is no longer used in Merlin, but we support it for compatibility.
1063 Thread *thread = Thread::current();
1064 Handle stream(thread, print_stream);
1065 objArrayHandle result (thread, objArrayOop(backtrace(throwable)));
1066 if (result.is_null()) {
1067 print_to_stream(stream, no_stack_trace_message());
1068 return;
1069 }
1070
1071 while (result.not_null()) {
1072 objArrayHandle methods (thread,
1073 objArrayOop(result->obj_at(trace_methods_offset)));
1074 typeArrayHandle bcis (thread,
1075 typeArrayOop(result->obj_at(trace_bcis_offset)));
1076
1077 if (methods.is_null() || bcis.is_null()) {
1078 print_to_stream(stream, no_stack_trace_message());
1079 return;
1080 }
1081
1082 int length = methods()->length();
1083 for (int index = 0; index < length; index++) {
1084 methodOop method = methodOop(methods()->obj_at(index));
1085 if (method == NULL) return;
1086 int bci = bcis->ushort_at(index);
1087 print_stack_element(stream, method, bci);
1088 }
1089 result = objArrayHandle(thread, objArrayOop(result->obj_at(trace_next_offset)));
1090 }
1091 }
1092
1093 // This class provides a simple wrapper over the internal structure of
1094 // exception backtrace to insulate users of the backtrace from needing
1095 // to know what it looks like.
1096 class BacktraceBuilder: public StackObj {
1097 private:
1098 Handle _backtrace;
1099 objArrayOop _head;
1100 objArrayOop _methods;
1101 typeArrayOop _bcis;
1102 int _index;
1103 bool _dirty;
1104 No_Safepoint_Verifier _nsv;
1105
1106 public:
1107
1108 enum {
1109 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
1110 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
1111 trace_next_offset = java_lang_Throwable::trace_next_offset,
1112 trace_size = java_lang_Throwable::trace_size,
1113 trace_chunk_size = java_lang_Throwable::trace_chunk_size
1114 };
1115
1116 // constructor for new backtrace
1117 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _dirty(false) {
1118 expand(CHECK);
1119 _backtrace = _head;
1120 _index = 0;
1121 }
1122
1123 void flush() {
1124 if (_dirty && _methods != NULL) {
1125 BarrierSet* bs = Universe::heap()->barrier_set();
1126 assert(bs->has_write_ref_array_opt(), "Barrier set must have ref array opt");
1127 bs->write_ref_array(MemRegion((HeapWord*)_methods->base(),
1128 _methods->array_size()));
1129 _dirty = false;
1130 }
1131 }
1132
1133 void expand(TRAPS) {
1134 flush();
1135
1136 objArrayHandle old_head(THREAD, _head);
1137 Pause_No_Safepoint_Verifier pnsv(&_nsv);
1138
1139 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
1140 objArrayHandle new_head(THREAD, head);
1141
1142 objArrayOop methods = oopFactory::new_objectArray(trace_chunk_size, CHECK);
1143 objArrayHandle new_methods(THREAD, methods);
1144
1145 typeArrayOop bcis = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1146 typeArrayHandle new_bcis(THREAD, bcis);
1147
1148 if (!old_head.is_null()) {
1149 old_head->obj_at_put(trace_next_offset, new_head());
1150 }
1151 new_head->obj_at_put(trace_methods_offset, new_methods());
1152 new_head->obj_at_put(trace_bcis_offset, new_bcis());
1153
1154 _head = new_head();
1155 _methods = new_methods();
1156 _bcis = new_bcis();
1157 _index = 0;
1158 }
1159
1160 oop backtrace() {
1161 flush();
1162 return _backtrace();
1163 }
1164
1165 inline void push(methodOop method, short bci, TRAPS) {
1166 if (_index >= trace_chunk_size) {
1167 methodHandle mhandle(THREAD, method);
1168 expand(CHECK);
1169 method = mhandle();
1170 }
1171
1172 _methods->obj_at_put(_index, method);
1173 // bad for UseCompressedOops
1174 // *_methods->obj_at_addr(_index) = method;
1175 _bcis->ushort_at_put(_index, bci);
1176 _index++;
1177 _dirty = true;
1178 }
1179
1180 methodOop current_method() {
1181 assert(_index >= 0 && _index < trace_chunk_size, "out of range");
1182 return methodOop(_methods->obj_at(_index));
1183 }
1184
1185 jushort current_bci() {
1186 assert(_index >= 0 && _index < trace_chunk_size, "out of range");
1187 return _bcis->ushort_at(_index);
1188 }
1189 };
1190
1191
1192 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, TRAPS) {
1193 if (!StackTraceInThrowable) return;
1194 ResourceMark rm(THREAD);
1195
1196 // Start out by clearing the backtrace for this object, in case the VM
1197 // runs out of memory while allocating the stack trace
1198 set_backtrace(throwable(), NULL);
1199 if (JDK_Version::is_gte_jdk14x_version()) {
1200 // New since 1.4, clear lazily constructed Java level stacktrace if
1201 // refilling occurs
1202 clear_stacktrace(throwable());
1203 }
1204
1205 int max_depth = MaxJavaStackTraceDepth;
1206 JavaThread* thread = (JavaThread*)THREAD;
1207 BacktraceBuilder bt(CHECK);
1208
1209 // Instead of using vframe directly, this version of fill_in_stack_trace
1210 // basically handles everything by hand. This significantly improved the
1211 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
1212 // See bug 6333838 for more details.
1213 // The "ASSERT" here is to verify this method generates the exactly same stack
1214 // trace as utilizing vframe.
1215 #ifdef ASSERT
1216 vframeStream st(thread);
1217 methodHandle st_method(THREAD, st.method());
1218 #endif
1219 int total_count = 0;
1220 RegisterMap map(thread, false);
1221 int decode_offset = 0;
1222 nmethod* nm = NULL;
1223 bool skip_fillInStackTrace_check = false;
1224 bool skip_throwableInit_check = false;
1225
1226 for (frame fr = thread->last_frame(); max_depth != total_count;) {
1227 methodOop method = NULL;
1228 int bci = 0;
1229
1230 // Compiled java method case.
1231 if (decode_offset != 0) {
1232 bool restart = false;
1233 DebugInfoReadStream stream(nm, decode_offset);
1234 decode_offset = stream.read_int();
1235 method = (methodOop)nm->oop_at(stream.read_int());
1236 bci = stream.read_bci_and_restart(restart); //dummy restart bit
1237 } else {
1238 if (fr.is_first_frame()) break;
1239 address pc = fr.pc();
1240 if (fr.is_interpreted_frame()) {
1241 intptr_t bcx = fr.interpreter_frame_bcx();
1242 method = fr.interpreter_frame_method();
1243 bci = fr.is_bci(bcx) ? bcx : method->bci_from((address)bcx);
1244 fr = fr.sender(&map);
1245 } else {
1246 CodeBlob* cb = fr.cb();
1247 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
1248 // but non nmethod
1249 fr = fr.sender(&map);
1250 if (cb == NULL || !cb->is_nmethod()) {
1251 continue;
1252 }
1253 nm = (nmethod*)cb;
1254 if (nm->method()->is_native()) {
1255 method = nm->method();
1256 bci = 0;
1257 } else {
1258 PcDesc* pd = nm->pc_desc_at(pc);
1259 decode_offset = pd->scope_decode_offset();
1260 // if decode_offset is not equal to 0, it will execute the
1261 // "compiled java method case" at the beginning of the loop.
1262 continue;
1263 }
1264 }
1265 }
1266 #ifdef ASSERT
1267 assert(st_method() == method && st.bci() == bci,
1268 "Wrong stack trace");
1269 st.next();
1270 // vframeStream::method isn't GC-safe so store off a copy
1271 // of the methodOop in case we GC.
1272 if (!st.at_end()) {
1273 st_method = st.method();
1274 }
1275 #endif
1276 if (!skip_fillInStackTrace_check) {
1277 // check "fillInStackTrace" only once, so we negate the flag
1278 // after the first time check.
1279 skip_fillInStackTrace_check = true;
1280 if (method->name() == vmSymbols::fillInStackTrace_name()) {
1281 continue;
1282 }
1283 }
1284 // skip <init> methods of the exceptions klass. If there is <init> methods
1285 // that belongs to a superclass of the exception we are going to skipping
1286 // them in stack trace. This is simlar to classic VM.
1287 if (!skip_throwableInit_check) {
1288 if (method->name() == vmSymbols::object_initializer_name() &&
1289 throwable->is_a(method->method_holder())) {
1290 continue;
1291 } else {
1292 // if no "Throwable.init()" method found, we stop checking it next time.
1293 skip_throwableInit_check = true;
1294 }
1295 }
1296 bt.push(method, bci, CHECK);
1297 total_count++;
1298 }
1299
1300 // Put completed stack trace into throwable object
1301 set_backtrace(throwable(), bt.backtrace());
1302 }
1303
1304 void java_lang_Throwable::fill_in_stack_trace(Handle throwable) {
1305 // No-op if stack trace is disabled
1306 if (!StackTraceInThrowable) {
1307 return;
1308 }
1309
1310 // Disable stack traces for some preallocated out of memory errors
1311 if (!Universe::should_fill_in_stack_trace(throwable)) {
1312 return;
1313 }
1314
1315 PRESERVE_EXCEPTION_MARK;
1316
1317 JavaThread* thread = JavaThread::active();
1318 fill_in_stack_trace(throwable, thread);
1319 // ignore exceptions thrown during stack trace filling
1320 CLEAR_PENDING_EXCEPTION;
1321 }
1322
1323 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
1324 // Allocate stack trace - backtrace is created but not filled in
1325
1326 // No-op if stack trace is disabled
1327 if (!StackTraceInThrowable) return;
1328
1329 objArrayOop h_oop = oopFactory::new_objectArray(trace_size, CHECK);
1330 objArrayHandle backtrace (THREAD, h_oop);
1331 objArrayOop m_oop = oopFactory::new_objectArray(trace_chunk_size, CHECK);
1332 objArrayHandle methods (THREAD, m_oop);
1333 typeArrayOop b = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1334 typeArrayHandle bcis(THREAD, b);
1335
1336 // backtrace has space for one chunk (next is NULL)
1337 backtrace->obj_at_put(trace_methods_offset, methods());
1338 backtrace->obj_at_put(trace_bcis_offset, bcis());
1339 set_backtrace(throwable(), backtrace());
1340 }
1341
1342
1343 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
1344 // Fill in stack trace into preallocated backtrace (no GC)
1345
1346 // No-op if stack trace is disabled
1347 if (!StackTraceInThrowable) return;
1348
1349 assert(throwable->is_a(SystemDictionary::throwable_klass()), "sanity check");
1350
1351 oop backtrace = java_lang_Throwable::backtrace(throwable());
1352 assert(backtrace != NULL, "backtrace not preallocated");
1353
1354 oop m = objArrayOop(backtrace)->obj_at(trace_methods_offset);
1355 objArrayOop methods = objArrayOop(m);
1356 assert(methods != NULL && methods->length() > 0, "method array not preallocated");
1357
1358 oop b = objArrayOop(backtrace)->obj_at(trace_bcis_offset);
1359 typeArrayOop bcis = typeArrayOop(b);
1360 assert(bcis != NULL, "bci array not preallocated");
1361
1362 assert(methods->length() == bcis->length(), "method and bci arrays should match");
1363
1364 JavaThread* thread = JavaThread::current();
1365 ResourceMark rm(thread);
1366 vframeStream st(thread);
1367
1368 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
1369 // methods as preallocated errors aren't created by "java" code.
1370
1371 // fill in as much stack trace as possible
1372 int max_chunks = MIN2(methods->length(), (int)MaxJavaStackTraceDepth);
1373 int chunk_count = 0;
1374
1375 for (;!st.at_end(); st.next()) {
1376 // add element
1377 bcis->ushort_at_put(chunk_count, st.bci());
1378 methods->obj_at_put(chunk_count, st.method());
1379
1380 chunk_count++;
1381
1382 // Bail-out for deep stacks
1383 if (chunk_count >= max_chunks) break;
1384 }
1385 }
1386
1387
1388 int java_lang_Throwable::get_stack_trace_depth(oop throwable, TRAPS) {
1389 if (throwable == NULL) {
1390 THROW_0(vmSymbols::java_lang_NullPointerException());
1391 }
1392 objArrayOop chunk = objArrayOop(backtrace(throwable));
1393 int depth = 0;
1394 if (chunk != NULL) {
1395 // Iterate over chunks and count full ones
1396 while (true) {
1397 objArrayOop next = objArrayOop(chunk->obj_at(trace_next_offset));
1398 if (next == NULL) break;
1399 depth += trace_chunk_size;
1400 chunk = next;
1401 }
1402 assert(chunk != NULL && chunk->obj_at(trace_next_offset) == NULL, "sanity check");
1403 // Count element in remaining partial chunk
1404 objArrayOop methods = objArrayOop(chunk->obj_at(trace_methods_offset));
1405 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1406 assert(methods != NULL && bcis != NULL, "sanity check");
1407 for (int i = 0; i < methods->length(); i++) {
1408 if (methods->obj_at(i) == NULL) break;
1409 depth++;
1410 }
1411 }
1412 return depth;
1413 }
1414
1415
1416 oop java_lang_Throwable::get_stack_trace_element(oop throwable, int index, TRAPS) {
1417 if (throwable == NULL) {
1418 THROW_0(vmSymbols::java_lang_NullPointerException());
1419 }
1420 if (index < 0) {
1421 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1422 }
1423 // Compute how many chunks to skip and index into actual chunk
1424 objArrayOop chunk = objArrayOop(backtrace(throwable));
1425 int skip_chunks = index / trace_chunk_size;
1426 int chunk_index = index % trace_chunk_size;
1427 while (chunk != NULL && skip_chunks > 0) {
1428 chunk = objArrayOop(chunk->obj_at(trace_next_offset));
1429 skip_chunks--;
1430 }
1431 if (chunk == NULL) {
1432 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1433 }
1434 // Get method,bci from chunk
1435 objArrayOop methods = objArrayOop(chunk->obj_at(trace_methods_offset));
1436 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1437 assert(methods != NULL && bcis != NULL, "sanity check");
1438 methodHandle method(THREAD, methodOop(methods->obj_at(chunk_index)));
1439 int bci = bcis->ushort_at(chunk_index);
1440 // Chunk can be partial full
1441 if (method.is_null()) {
1442 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1443 }
1444
1445 oop element = java_lang_StackTraceElement::create(method, bci, CHECK_0);
1446 return element;
1447 }
1448
1449 oop java_lang_StackTraceElement::create(methodHandle method, int bci, TRAPS) {
1450 // SystemDictionary::stackTraceElement_klass() will be null for pre-1.4 JDKs
1451 assert(JDK_Version::is_gte_jdk14x_version(), "should only be called in >= 1.4");
1452
1453 // Allocate java.lang.StackTraceElement instance
1454 klassOop k = SystemDictionary::stackTraceElement_klass();
1455 assert(k != NULL, "must be loaded in 1.4+");
1456 instanceKlassHandle ik (THREAD, k);
1457 if (ik->should_be_initialized()) {
1458 ik->initialize(CHECK_0);
1459 }
1460
1461 Handle element = ik->allocate_instance_handle(CHECK_0);
1462 // Fill in class name
1463 ResourceMark rm(THREAD);
1464 const char* str = instanceKlass::cast(method->method_holder())->external_name();
1465 oop classname = StringTable::intern((char*) str, CHECK_0);
1466 java_lang_StackTraceElement::set_declaringClass(element(), classname);
1467 // Fill in method name
1468 oop methodname = StringTable::intern(method->name(), CHECK_0);
1469 java_lang_StackTraceElement::set_methodName(element(), methodname);
1470 // Fill in source file name
1471 symbolOop source = instanceKlass::cast(method->method_holder())->source_file_name();
1472 oop filename = StringTable::intern(source, CHECK_0);
1473 java_lang_StackTraceElement::set_fileName(element(), filename);
1474 // File in source line number
1475 int line_number;
1476 if (method->is_native()) {
1477 // Negative value different from -1 below, enabling Java code in
1478 // class java.lang.StackTraceElement to distinguish "native" from
1479 // "no LineNumberTable".
1480 line_number = -2;
1481 } else {
1482 // Returns -1 if no LineNumberTable, and otherwise actual line number
1483 line_number = method->line_number_from_bci(bci);
1484 }
1485 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
1486
1487 return element();
1488 }
1489
1490
1491 void java_lang_reflect_AccessibleObject::compute_offsets() {
1492 klassOop k = SystemDictionary::reflect_accessible_object_klass();
1493 compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature());
1494 }
1495
1496 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
1497 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1498 return (jboolean) reflect->bool_field(override_offset);
1499 }
1500
1501 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
1502 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1503 reflect->bool_field_put(override_offset, (int) value);
1504 }
1505
1506 void java_lang_reflect_Method::compute_offsets() {
1507 klassOop k = SystemDictionary::reflect_method_klass();
1508 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
1509 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1510 compute_offset(returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature());
1511 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
1512 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
1513 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
1514 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
1515 // The generic signature and annotations fields are only present in 1.5
1516 signature_offset = -1;
1517 annotations_offset = -1;
1518 parameter_annotations_offset = -1;
1519 annotation_default_offset = -1;
1520 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
1521 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
1522 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
1523 compute_optional_offset(annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature());
1524 }
1525
1526 Handle java_lang_reflect_Method::create(TRAPS) {
1527 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1528 klassOop klass = SystemDictionary::reflect_method_klass();
1529 // This class is eagerly initialized during VM initialization, since we keep a refence
1530 // to one of the methods
1531 assert(instanceKlass::cast(klass)->is_initialized(), "must be initialized");
1532 return instanceKlass::cast(klass)->allocate_instance_handle(CHECK_NH);
1533 }
1534
1535 oop java_lang_reflect_Method::clazz(oop reflect) {
1536 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1537 return reflect->obj_field(clazz_offset);
1538 }
1539
1540 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
1541 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1542 reflect->obj_field_put(clazz_offset, value);
1543 }
1544
1545 int java_lang_reflect_Method::slot(oop reflect) {
1546 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1547 return reflect->int_field(slot_offset);
1548 }
1549
1550 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
1551 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1552 reflect->int_field_put(slot_offset, value);
1553 }
1554
1555 oop java_lang_reflect_Method::name(oop method) {
1556 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1557 return method->obj_field(name_offset);
1558 }
1559
1560 void java_lang_reflect_Method::set_name(oop method, oop value) {
1561 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1562 method->obj_field_put(name_offset, value);
1563 }
1564
1565 oop java_lang_reflect_Method::return_type(oop method) {
1566 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1567 return method->obj_field(returnType_offset);
1568 }
1569
1570 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
1571 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1572 method->obj_field_put(returnType_offset, value);
1573 }
1574
1575 oop java_lang_reflect_Method::parameter_types(oop method) {
1576 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1577 return method->obj_field(parameterTypes_offset);
1578 }
1579
1580 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
1581 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1582 method->obj_field_put(parameterTypes_offset, value);
1583 }
1584
1585 oop java_lang_reflect_Method::exception_types(oop method) {
1586 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1587 return method->obj_field(exceptionTypes_offset);
1588 }
1589
1590 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
1591 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1592 method->obj_field_put(exceptionTypes_offset, value);
1593 }
1594
1595 int java_lang_reflect_Method::modifiers(oop method) {
1596 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1597 return method->int_field(modifiers_offset);
1598 }
1599
1600 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
1601 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1602 method->int_field_put(modifiers_offset, value);
1603 }
1604
1605 bool java_lang_reflect_Method::has_signature_field() {
1606 return (signature_offset >= 0);
1607 }
1608
1609 oop java_lang_reflect_Method::signature(oop method) {
1610 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1611 assert(has_signature_field(), "signature field must be present");
1612 return method->obj_field(signature_offset);
1613 }
1614
1615 void java_lang_reflect_Method::set_signature(oop method, oop value) {
1616 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1617 assert(has_signature_field(), "signature field must be present");
1618 method->obj_field_put(signature_offset, value);
1619 }
1620
1621 bool java_lang_reflect_Method::has_annotations_field() {
1622 return (annotations_offset >= 0);
1623 }
1624
1625 oop java_lang_reflect_Method::annotations(oop method) {
1626 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1627 assert(has_annotations_field(), "annotations field must be present");
1628 return method->obj_field(annotations_offset);
1629 }
1630
1631 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
1632 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1633 assert(has_annotations_field(), "annotations field must be present");
1634 method->obj_field_put(annotations_offset, value);
1635 }
1636
1637 bool java_lang_reflect_Method::has_parameter_annotations_field() {
1638 return (parameter_annotations_offset >= 0);
1639 }
1640
1641 oop java_lang_reflect_Method::parameter_annotations(oop method) {
1642 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1643 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
1644 return method->obj_field(parameter_annotations_offset);
1645 }
1646
1647 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
1648 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1649 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
1650 method->obj_field_put(parameter_annotations_offset, value);
1651 }
1652
1653 bool java_lang_reflect_Method::has_annotation_default_field() {
1654 return (annotation_default_offset >= 0);
1655 }
1656
1657 oop java_lang_reflect_Method::annotation_default(oop method) {
1658 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1659 assert(has_annotation_default_field(), "annotation default field must be present");
1660 return method->obj_field(annotation_default_offset);
1661 }
1662
1663 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
1664 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1665 assert(has_annotation_default_field(), "annotation default field must be present");
1666 method->obj_field_put(annotation_default_offset, value);
1667 }
1668
1669 void java_lang_reflect_Constructor::compute_offsets() {
1670 klassOop k = SystemDictionary::reflect_constructor_klass();
1671 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
1672 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
1673 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
1674 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
1675 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
1676 // The generic signature and annotations fields are only present in 1.5
1677 signature_offset = -1;
1678 annotations_offset = -1;
1679 parameter_annotations_offset = -1;
1680 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
1681 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
1682 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
1683 }
1684
1685 Handle java_lang_reflect_Constructor::create(TRAPS) {
1686 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1687 symbolHandle name = vmSymbolHandles::java_lang_reflect_Constructor();
1688 klassOop k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
1689 instanceKlassHandle klass (THREAD, k);
1690 // Ensure it is initialized
1691 klass->initialize(CHECK_NH);
1692 return klass->allocate_instance_handle(CHECK_NH);
1693 }
1694
1695 oop java_lang_reflect_Constructor::clazz(oop reflect) {
1696 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1697 return reflect->obj_field(clazz_offset);
1698 }
1699
1700 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
1701 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1702 reflect->obj_field_put(clazz_offset, value);
1703 }
1704
1705 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
1706 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1707 return constructor->obj_field(parameterTypes_offset);
1708 }
1709
1710 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
1711 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1712 constructor->obj_field_put(parameterTypes_offset, value);
1713 }
1714
1715 oop java_lang_reflect_Constructor::exception_types(oop constructor) {
1716 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1717 return constructor->obj_field(exceptionTypes_offset);
1718 }
1719
1720 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
1721 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1722 constructor->obj_field_put(exceptionTypes_offset, value);
1723 }
1724
1725 int java_lang_reflect_Constructor::slot(oop reflect) {
1726 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1727 return reflect->int_field(slot_offset);
1728 }
1729
1730 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
1731 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1732 reflect->int_field_put(slot_offset, value);
1733 }
1734
1735 int java_lang_reflect_Constructor::modifiers(oop constructor) {
1736 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1737 return constructor->int_field(modifiers_offset);
1738 }
1739
1740 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
1741 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1742 constructor->int_field_put(modifiers_offset, value);
1743 }
1744
1745 bool java_lang_reflect_Constructor::has_signature_field() {
1746 return (signature_offset >= 0);
1747 }
1748
1749 oop java_lang_reflect_Constructor::signature(oop constructor) {
1750 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1751 assert(has_signature_field(), "signature field must be present");
1752 return constructor->obj_field(signature_offset);
1753 }
1754
1755 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
1756 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1757 assert(has_signature_field(), "signature field must be present");
1758 constructor->obj_field_put(signature_offset, value);
1759 }
1760
1761 bool java_lang_reflect_Constructor::has_annotations_field() {
1762 return (annotations_offset >= 0);
1763 }
1764
1765 oop java_lang_reflect_Constructor::annotations(oop constructor) {
1766 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1767 assert(has_annotations_field(), "annotations field must be present");
1768 return constructor->obj_field(annotations_offset);
1769 }
1770
1771 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
1772 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1773 assert(has_annotations_field(), "annotations field must be present");
1774 constructor->obj_field_put(annotations_offset, value);
1775 }
1776
1777 bool java_lang_reflect_Constructor::has_parameter_annotations_field() {
1778 return (parameter_annotations_offset >= 0);
1779 }
1780
1781 oop java_lang_reflect_Constructor::parameter_annotations(oop method) {
1782 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1783 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
1784 return method->obj_field(parameter_annotations_offset);
1785 }
1786
1787 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
1788 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1789 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
1790 method->obj_field_put(parameter_annotations_offset, value);
1791 }
1792
1793 void java_lang_reflect_Field::compute_offsets() {
1794 klassOop k = SystemDictionary::reflect_field_klass();
1795 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
1796 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1797 compute_offset(type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature());
1798 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
1799 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
1800 // The generic signature and annotations fields are only present in 1.5
1801 signature_offset = -1;
1802 annotations_offset = -1;
1803 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
1804 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
1805 }
1806
1807 Handle java_lang_reflect_Field::create(TRAPS) {
1808 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1809 symbolHandle name = vmSymbolHandles::java_lang_reflect_Field();
1810 klassOop k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
1811 instanceKlassHandle klass (THREAD, k);
1812 // Ensure it is initialized
1813 klass->initialize(CHECK_NH);
1814 return klass->allocate_instance_handle(CHECK_NH);
1815 }
1816
1817 oop java_lang_reflect_Field::clazz(oop reflect) {
1818 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1819 return reflect->obj_field(clazz_offset);
1820 }
1821
1822 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
1823 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1824 reflect->obj_field_put(clazz_offset, value);
1825 }
1826
1827 oop java_lang_reflect_Field::name(oop field) {
1828 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1829 return field->obj_field(name_offset);
1830 }
1831
1832 void java_lang_reflect_Field::set_name(oop field, oop value) {
1833 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1834 field->obj_field_put(name_offset, value);
1835 }
1836
1837 oop java_lang_reflect_Field::type(oop field) {
1838 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1839 return field->obj_field(type_offset);
1840 }
1841
1842 void java_lang_reflect_Field::set_type(oop field, oop value) {
1843 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1844 field->obj_field_put(type_offset, value);
1845 }
1846
1847 int java_lang_reflect_Field::slot(oop reflect) {
1848 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1849 return reflect->int_field(slot_offset);
1850 }
1851
1852 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
1853 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1854 reflect->int_field_put(slot_offset, value);
1855 }
1856
1857 int java_lang_reflect_Field::modifiers(oop field) {
1858 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1859 return field->int_field(modifiers_offset);
1860 }
1861
1862 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
1863 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1864 field->int_field_put(modifiers_offset, value);
1865 }
1866
1867 bool java_lang_reflect_Field::has_signature_field() {
1868 return (signature_offset >= 0);
1869 }
1870
1871 oop java_lang_reflect_Field::signature(oop field) {
1872 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1873 assert(has_signature_field(), "signature field must be present");
1874 return field->obj_field(signature_offset);
1875 }
1876
1877 void java_lang_reflect_Field::set_signature(oop field, oop value) {
1878 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1879 assert(has_signature_field(), "signature field must be present");
1880 field->obj_field_put(signature_offset, value);
1881 }
1882
1883 bool java_lang_reflect_Field::has_annotations_field() {
1884 return (annotations_offset >= 0);
1885 }
1886
1887 oop java_lang_reflect_Field::annotations(oop field) {
1888 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1889 assert(has_annotations_field(), "annotations field must be present");
1890 return field->obj_field(annotations_offset);
1891 }
1892
1893 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
1894 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1895 assert(has_annotations_field(), "annotations field must be present");
1896 field->obj_field_put(annotations_offset, value);
1897 }
1898
1899
1900 void sun_reflect_ConstantPool::compute_offsets() {
1901 klassOop k = SystemDictionary::reflect_constant_pool_klass();
1902 // This null test can be removed post beta
1903 if (k != NULL) {
1904 compute_offset(_cp_oop_offset, k, vmSymbols::constantPoolOop_name(), vmSymbols::object_signature());
1905 }
1906 }
1907
1908
1909 Handle sun_reflect_ConstantPool::create(TRAPS) {
1910 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1911 klassOop k = SystemDictionary::reflect_constant_pool_klass();
1912 instanceKlassHandle klass (THREAD, k);
1913 // Ensure it is initialized
1914 klass->initialize(CHECK_NH);
1915 return klass->allocate_instance_handle(CHECK_NH);
1916 }
1917
1918
1919 oop sun_reflect_ConstantPool::cp_oop(oop reflect) {
1920 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1921 return reflect->obj_field(_cp_oop_offset);
1922 }
1923
1924
1925 void sun_reflect_ConstantPool::set_cp_oop(oop reflect, oop value) {
1926 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1927 reflect->obj_field_put(_cp_oop_offset, value);
1928 }
1929
1930 void sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
1931 klassOop k = SystemDictionary::reflect_unsafe_static_field_accessor_impl_klass();
1932 // This null test can be removed post beta
1933 if (k != NULL) {
1934 compute_offset(_base_offset, k,
1935 vmSymbols::base_name(), vmSymbols::object_signature());
1936 }
1937 }
1938
1939 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
1940 klassOop k = SystemDictionary::box_klass(type);
1941 if (k == NULL) return NULL;
1942 instanceKlassHandle h (THREAD, k);
1943 if (!h->is_initialized()) h->initialize(CHECK_0);
1944 return h->allocate_instance(THREAD);
1945 }
1946
1947
1948 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
1949 oop box = initialize_and_allocate(type, CHECK_0);
1950 if (box == NULL) return NULL;
1951 switch (type) {
1952 case T_BOOLEAN:
1953 box->bool_field_put(value_offset, value->z);
1954 break;
1955 case T_CHAR:
1956 box->char_field_put(value_offset, value->c);
1957 break;
1958 case T_FLOAT:
1959 box->float_field_put(value_offset, value->f);
1960 break;
1961 case T_DOUBLE:
1962 box->double_field_put(long_value_offset, value->d);
1963 break;
1964 case T_BYTE:
1965 box->byte_field_put(value_offset, value->b);
1966 break;
1967 case T_SHORT:
1968 box->short_field_put(value_offset, value->s);
1969 break;
1970 case T_INT:
1971 box->int_field_put(value_offset, value->i);
1972 break;
1973 case T_LONG:
1974 box->long_field_put(long_value_offset, value->j);
1975 break;
1976 default:
1977 return NULL;
1978 }
1979 return box;
1980 }
1981
1982
1983 BasicType java_lang_boxing_object::basic_type(oop box) {
1984 if (box == NULL) return T_ILLEGAL;
1985 BasicType type = SystemDictionary::box_klass_type(box->klass());
1986 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
1987 return T_ILLEGAL;
1988 return type;
1989 }
1990
1991
1992 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
1993 BasicType type = SystemDictionary::box_klass_type(box->klass());
1994 switch (type) {
1995 case T_BOOLEAN:
1996 value->z = box->bool_field(value_offset);
1997 break;
1998 case T_CHAR:
1999 value->c = box->char_field(value_offset);
2000 break;
2001 case T_FLOAT:
2002 value->f = box->float_field(value_offset);
2003 break;
2004 case T_DOUBLE:
2005 value->d = box->double_field(long_value_offset);
2006 break;
2007 case T_BYTE:
2008 value->b = box->byte_field(value_offset);
2009 break;
2010 case T_SHORT:
2011 value->s = box->short_field(value_offset);
2012 break;
2013 case T_INT:
2014 value->i = box->int_field(value_offset);
2015 break;
2016 case T_LONG:
2017 value->j = box->long_field(long_value_offset);
2018 break;
2019 default:
2020 return T_ILLEGAL;
2021 } // end switch
2022 return type;
2023 }
2024
2025
2026 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
2027 BasicType type = SystemDictionary::box_klass_type(box->klass());
2028 switch (type) {
2029 case T_BOOLEAN:
2030 box->bool_field_put(value_offset, value->z);
2031 break;
2032 case T_CHAR:
2033 box->char_field_put(value_offset, value->c);
2034 break;
2035 case T_FLOAT:
2036 box->float_field_put(value_offset, value->f);
2037 break;
2038 case T_DOUBLE:
2039 box->double_field_put(long_value_offset, value->d);
2040 break;
2041 case T_BYTE:
2042 box->byte_field_put(value_offset, value->b);
2043 break;
2044 case T_SHORT:
2045 box->short_field_put(value_offset, value->s);
2046 break;
2047 case T_INT:
2048 box->int_field_put(value_offset, value->i);
2049 break;
2050 case T_LONG:
2051 box->long_field_put(long_value_offset, value->j);
2052 break;
2053 default:
2054 return T_ILLEGAL;
2055 } // end switch
2056 return type;
2057 }
2058
2059
2060 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
2061 switch (type) {
2062 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
2063 case T_CHAR: st->print("%d", value->c); break;
2064 case T_BYTE: st->print("%d", value->b); break;
2065 case T_SHORT: st->print("%d", value->s); break;
2066 case T_INT: st->print("%d", value->i); break;
2067 case T_LONG: st->print(INT64_FORMAT, value->j); break;
2068 case T_FLOAT: st->print("%f", value->f); break;
2069 case T_DOUBLE: st->print("%lf", value->d); break;
2070 default: st->print("type %d?", type); break;
2071 }
2072 }
2073
2074
2075 // Support for java_lang_ref_Reference
2076 oop java_lang_ref_Reference::pending_list_lock() {
2077 instanceKlass* ik = instanceKlass::cast(SystemDictionary::reference_klass());
2078 char *addr = (((char *)ik->start_of_static_fields()) + static_lock_offset);
2079 if (UseCompressedOops) {
2080 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
2081 } else {
2082 return oopDesc::load_decode_heap_oop((oop*)addr);
2083 }
2084 }
2085
2086 HeapWord *java_lang_ref_Reference::pending_list_addr() {
2087 instanceKlass* ik = instanceKlass::cast(SystemDictionary::reference_klass());
2088 char *addr = (((char *)ik->start_of_static_fields()) + static_pending_offset);
2089 // XXX This might not be HeapWord aligned, almost rather be char *.
2090 return (HeapWord*)addr;
2091 }
2092
2093 oop java_lang_ref_Reference::pending_list() {
2094 char *addr = (char *)pending_list_addr();
2095 if (UseCompressedOops) {
2096 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
2097 } else {
2098 return oopDesc::load_decode_heap_oop((oop*)addr);
2099 }
2100 }
2101
2102
2103 // Support for java_lang_ref_SoftReference
2104
2105 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
2106 return ref->long_field(timestamp_offset);
2107 }
2108
2109 jlong java_lang_ref_SoftReference::clock() {
2110 instanceKlass* ik = instanceKlass::cast(SystemDictionary::soft_reference_klass());
2111 int offset = ik->offset_of_static_fields() + static_clock_offset;
2112
2113 return SystemDictionary::soft_reference_klass()->long_field(offset);
2114 }
2115
2116 void java_lang_ref_SoftReference::set_clock(jlong value) {
2117 instanceKlass* ik = instanceKlass::cast(SystemDictionary::soft_reference_klass());
2118 int offset = ik->offset_of_static_fields() + static_clock_offset;
2119
2120 SystemDictionary::soft_reference_klass()->long_field_put(offset, value);
2121 }
2122
2123
2124 // Support for java_dyn_MethodHandle
2125
2126 int java_dyn_MethodHandle::_type_offset;
2127 int java_dyn_MethodHandle::_vmtarget_offset;
2128 int java_dyn_MethodHandle::_vmentry_offset;
2129 int java_dyn_MethodHandle::_vmslots_offset;
2130
2131 int sun_dyn_MemberName::_clazz_offset;
2132 int sun_dyn_MemberName::_name_offset;
2133 int sun_dyn_MemberName::_type_offset;
2134 int sun_dyn_MemberName::_flags_offset;
2135 int sun_dyn_MemberName::_vmtarget_offset;
2136 int sun_dyn_MemberName::_vmindex_offset;
2137
2138 int sun_dyn_DirectMethodHandle::_vmindex_offset;
2139
2140 int sun_dyn_BoundMethodHandle::_argument_offset;
2141 int sun_dyn_BoundMethodHandle::_vmargslot_offset;
2142
2143 int sun_dyn_AdapterMethodHandle::_conversion_offset;
2144
2145 void java_dyn_MethodHandle::compute_offsets() {
2146 klassOop k = SystemDictionary::MethodHandle_klass();
2147 if (k != NULL && EnableMethodHandles) {
2148 compute_offset(_type_offset, k, vmSymbols::type_name(), vmSymbols::java_dyn_MethodType_signature(), true);
2149 compute_offset(_vmtarget_offset, k, vmSymbols::vmtarget_name(), vmSymbols::object_signature(), true);
2150 compute_offset(_vmentry_offset, k, vmSymbols::vmentry_name(), vmSymbols::machine_word_signature(), true);
2151
2152 // Note: MH.vmslots (if it is present) is a hoisted copy of MH.type.form.vmslots.
2153 // It is optional pending experiments to keep or toss.
2154 compute_optional_offset(_vmslots_offset, k, vmSymbols::vmslots_name(), vmSymbols::int_signature(), true);
2155 }
2156 }
2157
2158 void sun_dyn_MemberName::compute_offsets() {
2159 klassOop k = SystemDictionary::MemberName_klass();
2160 if (k != NULL && EnableMethodHandles) {
2161 compute_offset(_clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
2162 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2163 compute_offset(_type_offset, k, vmSymbols::type_name(), vmSymbols::object_signature());
2164 compute_offset(_flags_offset, k, vmSymbols::flags_name(), vmSymbols::int_signature());
2165 compute_offset(_vmtarget_offset, k, vmSymbols::vmtarget_name(), vmSymbols::object_signature());
2166 compute_offset(_vmindex_offset, k, vmSymbols::vmindex_name(), vmSymbols::int_signature());
2167 }
2168 }
2169
2170 void sun_dyn_DirectMethodHandle::compute_offsets() {
2171 klassOop k = SystemDictionary::DirectMethodHandle_klass();
2172 if (k != NULL && EnableMethodHandles) {
2173 compute_offset(_vmindex_offset, k, vmSymbols::vmindex_name(), vmSymbols::int_signature(), true);
2174 }
2175 }
2176
2177 void sun_dyn_BoundMethodHandle::compute_offsets() {
2178 klassOop k = SystemDictionary::BoundMethodHandle_klass();
2179 if (k != NULL && EnableMethodHandles) {
2180 compute_offset(_vmargslot_offset, k, vmSymbols::vmargslot_name(), vmSymbols::int_signature(), true);
2181 compute_offset(_argument_offset, k, vmSymbols::argument_name(), vmSymbols::object_signature(), true);
2182 }
2183 }
2184
2185 void sun_dyn_AdapterMethodHandle::compute_offsets() {
2186 klassOop k = SystemDictionary::AdapterMethodHandle_klass();
2187 if (k != NULL && EnableMethodHandles) {
2188 compute_offset(_conversion_offset, k, vmSymbols::conversion_name(), vmSymbols::int_signature(), true);
2189 }
2190 }
2191
2192 oop java_dyn_MethodHandle::type(oop mh) {
2193 return mh->obj_field(_type_offset);
2194 }
2195
2196 void java_dyn_MethodHandle::set_type(oop mh, oop mtype) {
2197 mh->obj_field_put(_type_offset, mtype);
2198 }
2199
2200 int java_dyn_MethodHandle::vmslots(oop mh) {
2201 int vmslots_offset = _vmslots_offset;
2202 if (vmslots_offset != 0) {
2203 #ifdef ASSERT
2204 int x = mh->int_field(vmslots_offset);
2205 int y = compute_vmslots(mh);
2206 assert(x == y, "correct hoisted value");
2207 #endif
2208 return mh->int_field(vmslots_offset);
2209 } else {
2210 return compute_vmslots(mh);
2211 }
2212 }
2213
2214 // if MH.vmslots exists, hoist into it the value of type.form.vmslots
2215 void java_dyn_MethodHandle::init_vmslots(oop mh) {
2216 int vmslots_offset = _vmslots_offset;
2217 if (vmslots_offset != 0) {
2218 mh->int_field_put(vmslots_offset, compute_vmslots(mh));
2219 }
2220 }
2221
2222 // fetch type.form.vmslots, which is the number of JVM stack slots
2223 // required to carry the arguments of this MH
2224 int java_dyn_MethodHandle::compute_vmslots(oop mh) {
2225 oop mtype = type(mh);
2226 if (mtype == NULL) return 0; // Java code would get NPE
2227 oop form = java_dyn_MethodType::form(mtype);
2228 if (form == NULL) return 0; // Java code would get NPE
2229 return java_dyn_MethodTypeForm::vmslots(form);
2230 }
2231
2232 // fetch the low-level entry point for this mh
2233 MethodHandleEntry* java_dyn_MethodHandle::vmentry(oop mh) {
2234 return (MethodHandleEntry*) mh->address_field(_vmentry_offset);
2235 }
2236
2237 void java_dyn_MethodHandle::set_vmentry(oop mh, MethodHandleEntry* me) {
2238 assert(_vmentry_offset != 0, "must be present");
2239
2240 // This is always the final step that initializes a valid method handle:
2241 mh->release_address_field_put(_vmentry_offset, (address) me);
2242
2243 // There should be enough memory barriers on exit from native methods
2244 // to ensure that the MH is fully initialized to all threads before
2245 // Java code can publish it in global data structures.
2246 // But just in case, we use release_address_field_put.
2247 }
2248
2249 /// MemberName accessors
2250
2251 oop sun_dyn_MemberName::clazz(oop mname) {
2252 assert(is_instance(mname), "wrong type");
2253 return mname->obj_field(_clazz_offset);
2254 }
2255
2256 void sun_dyn_MemberName::set_clazz(oop mname, oop clazz) {
2257 assert(is_instance(mname), "wrong type");
2258 mname->obj_field_put(_clazz_offset, clazz);
2259 }
2260
2261 oop sun_dyn_MemberName::name(oop mname) {
2262 assert(is_instance(mname), "wrong type");
2263 return mname->obj_field(_name_offset);
2264 }
2265
2266 void sun_dyn_MemberName::set_name(oop mname, oop name) {
2267 assert(is_instance(mname), "wrong type");
2268 mname->obj_field_put(_name_offset, name);
2269 }
2270
2271 oop sun_dyn_MemberName::type(oop mname) {
2272 assert(is_instance(mname), "wrong type");
2273 return mname->obj_field(_type_offset);
2274 }
2275
2276 void sun_dyn_MemberName::set_type(oop mname, oop type) {
2277 assert(is_instance(mname), "wrong type");
2278 mname->obj_field_put(_type_offset, type);
2279 }
2280
2281 int sun_dyn_MemberName::flags(oop mname) {
2282 assert(is_instance(mname), "wrong type");
2283 return mname->int_field(_flags_offset);
2284 }
2285
2286 void sun_dyn_MemberName::set_flags(oop mname, int flags) {
2287 assert(is_instance(mname), "wrong type");
2288 mname->int_field_put(_flags_offset, flags);
2289 }
2290
2291 oop sun_dyn_MemberName::vmtarget(oop mname) {
2292 assert(is_instance(mname), "wrong type");
2293 return mname->obj_field(_vmtarget_offset);
2294 }
2295
2296 void sun_dyn_MemberName::set_vmtarget(oop mname, oop ref) {
2297 assert(is_instance(mname), "wrong type");
2298 mname->obj_field_put(_vmtarget_offset, ref);
2299 }
2300
2301 int sun_dyn_MemberName::vmindex(oop mname) {
2302 assert(is_instance(mname), "wrong type");
2303 return mname->int_field(_vmindex_offset);
2304 }
2305
2306 void sun_dyn_MemberName::set_vmindex(oop mname, int index) {
2307 assert(is_instance(mname), "wrong type");
2308 mname->int_field_put(_vmindex_offset, index);
2309 }
2310
2311 oop java_dyn_MethodHandle::vmtarget(oop mh) {
2312 assert(is_instance(mh), "MH only");
2313 return mh->obj_field(_vmtarget_offset);
2314 }
2315
2316 void java_dyn_MethodHandle::set_vmtarget(oop mh, oop ref) {
2317 assert(is_instance(mh), "MH only");
2318 mh->obj_field_put(_vmtarget_offset, ref);
2319 }
2320
2321 int sun_dyn_DirectMethodHandle::vmindex(oop mh) {
2322 assert(is_instance(mh), "DMH only");
2323 return mh->int_field(_vmindex_offset);
2324 }
2325
2326 void sun_dyn_DirectMethodHandle::set_vmindex(oop mh, int index) {
2327 assert(is_instance(mh), "DMH only");
2328 mh->int_field_put(_vmindex_offset, index);
2329 }
2330
2331 int sun_dyn_BoundMethodHandle::vmargslot(oop mh) {
2332 assert(is_instance(mh), "BMH only");
2333 return mh->int_field(_vmargslot_offset);
2334 }
2335
2336 oop sun_dyn_BoundMethodHandle::argument(oop mh) {
2337 assert(is_instance(mh), "BMH only");
2338 return mh->obj_field(_argument_offset);
2339 }
2340
2341 int sun_dyn_AdapterMethodHandle::conversion(oop mh) {
2342 assert(is_instance(mh), "AMH only");
2343 return mh->int_field(_conversion_offset);
2344 }
2345
2346 void sun_dyn_AdapterMethodHandle::set_conversion(oop mh, int conv) {
2347 assert(is_instance(mh), "AMH only");
2348 mh->int_field_put(_conversion_offset, conv);
2349 }
2350
2351
2352 // Support for java_dyn_MethodType
2353
2354 int java_dyn_MethodType::_rtype_offset;
2355 int java_dyn_MethodType::_ptypes_offset;
2356 int java_dyn_MethodType::_form_offset;
2357
2358 void java_dyn_MethodType::compute_offsets() {
2359 klassOop k = SystemDictionary::MethodType_klass();
2360 if (k != NULL) {
2361 compute_offset(_rtype_offset, k, vmSymbols::rtype_name(), vmSymbols::class_signature());
2362 compute_offset(_ptypes_offset, k, vmSymbols::ptypes_name(), vmSymbols::class_array_signature());
2363 compute_offset(_form_offset, k, vmSymbols::form_name(), vmSymbols::java_dyn_MethodTypeForm_signature());
2364 }
2365 }
2366
2367 void java_dyn_MethodType::print_signature(oop mt, outputStream* st) {
2368 st->print("(");
2369 objArrayOop pts = ptypes(mt);
2370 for (int i = 0, limit = pts->length(); i < limit; i++) {
2371 java_lang_Class::print_signature(pts->obj_at(i), st);
2372 }
2373 st->print(")");
2374 java_lang_Class::print_signature(rtype(mt), st);
2375 }
2376
2377 symbolOop java_dyn_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) {
2378 ResourceMark rm;
2379 stringStream buffer(128);
2380 print_signature(mt, &buffer);
2381 const char* sigstr = buffer.base();
2382 int siglen = (int) buffer.size();
2383 if (!intern_if_not_found)
2384 return SymbolTable::probe(sigstr, siglen);
2385 else
2386 return oopFactory::new_symbol(sigstr, siglen, THREAD);
2387 }
2388
2389 oop java_dyn_MethodType::rtype(oop mt) {
2390 assert(is_instance(mt), "must be a MethodType");
2391 return mt->obj_field(_rtype_offset);
2392 }
2393
2394 objArrayOop java_dyn_MethodType::ptypes(oop mt) {
2395 assert(is_instance(mt), "must be a MethodType");
2396 return (objArrayOop) mt->obj_field(_ptypes_offset);
2397 }
2398
2399 oop java_dyn_MethodType::form(oop mt) {
2400 assert(is_instance(mt), "must be a MethodType");
2401 return mt->obj_field(_form_offset);
2402 }
2403
2404 oop java_dyn_MethodType::ptype(oop mt, int idx) {
2405 return ptypes(mt)->obj_at(idx);
2406 }
2407
2408
2409
2410 // Support for java_dyn_MethodTypeForm
2411
2412 int java_dyn_MethodTypeForm::_vmslots_offset;
2413 int java_dyn_MethodTypeForm::_erasedType_offset;
2414
2415 void java_dyn_MethodTypeForm::compute_offsets() {
2416 klassOop k = SystemDictionary::MethodTypeForm_klass();
2417 if (k != NULL) {
2418 compute_optional_offset(_vmslots_offset, k, vmSymbols::vmslots_name(), vmSymbols::int_signature(), true);
2419 compute_optional_offset(_erasedType_offset, k, vmSymbols::erasedType_name(), vmSymbols::java_dyn_MethodType_signature(), true);
2420 }
2421 }
2422
2423 int java_dyn_MethodTypeForm::vmslots(oop mtform) {
2424 assert(mtform->klass() == SystemDictionary::MethodTypeForm_klass(), "MTForm only");
2425 return mtform->int_field(_vmslots_offset);
2426 }
2427
2428 oop java_dyn_MethodTypeForm::erasedType(oop mtform) {
2429 assert(mtform->klass() == SystemDictionary::MethodTypeForm_klass(), "MTForm only");
2430 return mtform->obj_field(_erasedType_offset);
2431 }
2432
2433
2434 // Support for sun_dyn_CallSiteImpl
2435
2436 int sun_dyn_CallSiteImpl::_type_offset;
2437 int sun_dyn_CallSiteImpl::_target_offset;
2438 int sun_dyn_CallSiteImpl::_vmmethod_offset;
2439
2440 void sun_dyn_CallSiteImpl::compute_offsets() {
2441 if (!EnableInvokeDynamic) return;
2442 klassOop k = SystemDictionary::CallSiteImpl_klass();
2443 if (k != NULL) {
2444 compute_offset(_type_offset, k, vmSymbols::type_name(), vmSymbols::java_dyn_MethodType_signature(), true);
2445 compute_offset(_target_offset, k, vmSymbols::target_name(), vmSymbols::java_dyn_MethodHandle_signature(), true);
2446 compute_offset(_vmmethod_offset, k, vmSymbols::vmmethod_name(), vmSymbols::object_signature(), true);
2447 }
2448 }
2449
2450 oop sun_dyn_CallSiteImpl::type(oop site) {
2451 return site->obj_field(_type_offset);
2452 }
2453
2454 oop sun_dyn_CallSiteImpl::target(oop site) {
2455 return site->obj_field(_target_offset);
2456 }
2457
2458 void sun_dyn_CallSiteImpl::set_target(oop site, oop target) {
2459 site->obj_field_put(_target_offset, target);
2460 }
2461
2462 oop sun_dyn_CallSiteImpl::vmmethod(oop site) {
2463 return site->obj_field(_vmmethod_offset);
2464 }
2465
2466 void sun_dyn_CallSiteImpl::set_vmmethod(oop site, oop ref) {
2467 site->obj_field_put(_vmmethod_offset, ref);
2468 }
2469
2470
2471 // Support for java_security_AccessControlContext
2472
2473 int java_security_AccessControlContext::_context_offset = 0;
2474 int java_security_AccessControlContext::_privilegedContext_offset = 0;
2475 int java_security_AccessControlContext::_isPrivileged_offset = 0;
2476
2477 void java_security_AccessControlContext::compute_offsets() {
2478 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
2479 fieldDescriptor fd;
2480 instanceKlass* ik = instanceKlass::cast(SystemDictionary::AccessControlContext_klass());
2481
2482 if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) {
2483 fatal("Invalid layout of java.security.AccessControlContext");
2484 }
2485 _context_offset = fd.offset();
2486
2487 if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) {
2488 fatal("Invalid layout of java.security.AccessControlContext");
2489 }
2490 _privilegedContext_offset = fd.offset();
2491
2492 if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) {
2493 fatal("Invalid layout of java.security.AccessControlContext");
2494 }
2495 _isPrivileged_offset = fd.offset();
2496 }
2497
2498
2499 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
2500 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
2501 // Ensure klass is initialized
2502 instanceKlass::cast(SystemDictionary::AccessControlContext_klass())->initialize(CHECK_0);
2503 // Allocate result
2504 oop result = instanceKlass::cast(SystemDictionary::AccessControlContext_klass())->allocate_instance(CHECK_0);
2505 // Fill in values
2506 result->obj_field_put(_context_offset, context());
2507 result->obj_field_put(_privilegedContext_offset, privileged_context());
2508 result->bool_field_put(_isPrivileged_offset, isPrivileged);
2509 return result;
2510 }
2511
2512
2513 // Support for java_lang_ClassLoader
2514
2515 oop java_lang_ClassLoader::parent(oop loader) {
2516 assert(loader->is_oop(), "loader must be oop");
2517 return loader->obj_field(parent_offset);
2518 }
2519
2520
2521 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
2522 // Fix for 4474172; see evaluation for more details
2523 loader = non_reflection_class_loader(loader);
2524
2525 oop cl = SystemDictionary::java_system_loader();
2526 while(cl != NULL) {
2527 if (cl == loader) return true;
2528 cl = parent(cl);
2529 }
2530 return false;
2531 }
2532
2533 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
2534 if (loader != NULL) {
2535 // See whether this is one of the class loaders associated with
2536 // the generated bytecodes for reflection, and if so, "magically"
2537 // delegate to its parent to prevent class loading from occurring
2538 // in places where applications using reflection didn't expect it.
2539 klassOop delegating_cl_class = SystemDictionary::reflect_delegating_classloader_klass();
2540 // This might be null in non-1.4 JDKs
2541 if (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)) {
2542 return parent(loader);
2543 }
2544 }
2545 return loader;
2546 }
2547
2548
2549 // Support for java_lang_System
2550
2551 void java_lang_System::compute_offsets() {
2552 assert(offset_of_static_fields == 0, "offsets should be initialized only once");
2553
2554 instanceKlass* ik = instanceKlass::cast(SystemDictionary::system_klass());
2555 offset_of_static_fields = ik->offset_of_static_fields();
2556 }
2557
2558 int java_lang_System::in_offset_in_bytes() {
2559 return (offset_of_static_fields + static_in_offset);
2560 }
2561
2562
2563 int java_lang_System::out_offset_in_bytes() {
2564 return (offset_of_static_fields + static_out_offset);
2565 }
2566
2567
2568 int java_lang_System::err_offset_in_bytes() {
2569 return (offset_of_static_fields + static_err_offset);
2570 }
2571
2572
2573
2574 int java_lang_String::value_offset;
2575 int java_lang_String::offset_offset;
2576 int java_lang_String::count_offset;
2577 int java_lang_String::hash_offset;
2578 int java_lang_Class::klass_offset;
2579 int java_lang_Class::array_klass_offset;
2580 int java_lang_Class::resolved_constructor_offset;
2581 int java_lang_Class::number_of_fake_oop_fields;
2582 int java_lang_Throwable::backtrace_offset;
2583 int java_lang_Throwable::detailMessage_offset;
2584 int java_lang_Throwable::cause_offset;
2585 int java_lang_Throwable::stackTrace_offset;
2586 int java_lang_reflect_AccessibleObject::override_offset;
2587 int java_lang_reflect_Method::clazz_offset;
2588 int java_lang_reflect_Method::name_offset;
2589 int java_lang_reflect_Method::returnType_offset;
2590 int java_lang_reflect_Method::parameterTypes_offset;
2591 int java_lang_reflect_Method::exceptionTypes_offset;
2592 int java_lang_reflect_Method::slot_offset;
2593 int java_lang_reflect_Method::modifiers_offset;
2594 int java_lang_reflect_Method::signature_offset;
2595 int java_lang_reflect_Method::annotations_offset;
2596 int java_lang_reflect_Method::parameter_annotations_offset;
2597 int java_lang_reflect_Method::annotation_default_offset;
2598 int java_lang_reflect_Constructor::clazz_offset;
2599 int java_lang_reflect_Constructor::parameterTypes_offset;
2600 int java_lang_reflect_Constructor::exceptionTypes_offset;
2601 int java_lang_reflect_Constructor::slot_offset;
2602 int java_lang_reflect_Constructor::modifiers_offset;
2603 int java_lang_reflect_Constructor::signature_offset;
2604 int java_lang_reflect_Constructor::annotations_offset;
2605 int java_lang_reflect_Constructor::parameter_annotations_offset;
2606 int java_lang_reflect_Field::clazz_offset;
2607 int java_lang_reflect_Field::name_offset;
2608 int java_lang_reflect_Field::type_offset;
2609 int java_lang_reflect_Field::slot_offset;
2610 int java_lang_reflect_Field::modifiers_offset;
2611 int java_lang_reflect_Field::signature_offset;
2612 int java_lang_reflect_Field::annotations_offset;
2613 int java_lang_boxing_object::value_offset;
2614 int java_lang_boxing_object::long_value_offset;
2615 int java_lang_ref_Reference::referent_offset;
2616 int java_lang_ref_Reference::queue_offset;
2617 int java_lang_ref_Reference::next_offset;
2618 int java_lang_ref_Reference::discovered_offset;
2619 int java_lang_ref_Reference::static_lock_offset;
2620 int java_lang_ref_Reference::static_pending_offset;
2621 int java_lang_ref_Reference::number_of_fake_oop_fields;
2622 int java_lang_ref_SoftReference::timestamp_offset;
2623 int java_lang_ref_SoftReference::static_clock_offset;
2624 int java_lang_ClassLoader::parent_offset;
2625 int java_lang_System::offset_of_static_fields;
2626 int java_lang_System::static_in_offset;
2627 int java_lang_System::static_out_offset;
2628 int java_lang_System::static_err_offset;
2629 int java_lang_StackTraceElement::declaringClass_offset;
2630 int java_lang_StackTraceElement::methodName_offset;
2631 int java_lang_StackTraceElement::fileName_offset;
2632 int java_lang_StackTraceElement::lineNumber_offset;
2633 int java_lang_AssertionStatusDirectives::classes_offset;
2634 int java_lang_AssertionStatusDirectives::classEnabled_offset;
2635 int java_lang_AssertionStatusDirectives::packages_offset;
2636 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
2637 int java_lang_AssertionStatusDirectives::deflt_offset;
2638 int java_nio_Buffer::_limit_offset;
2639 int sun_misc_AtomicLongCSImpl::_value_offset;
2640 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0;
2641 int sun_reflect_ConstantPool::_cp_oop_offset;
2642 int sun_reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
2643
2644
2645 // Support for java_lang_StackTraceElement
2646
2647 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
2648 element->obj_field_put(fileName_offset, value);
2649 }
2650
2651 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
2652 element->obj_field_put(declaringClass_offset, value);
2653 }
2654
2655 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
2656 element->obj_field_put(methodName_offset, value);
2657 }
2658
2659 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
2660 element->int_field_put(lineNumber_offset, value);
2661 }
2662
2663
2664 // Support for java Assertions - java_lang_AssertionStatusDirectives.
2665
2666 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
2667 o->obj_field_put(classes_offset, val);
2668 }
2669
2670 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
2671 o->obj_field_put(classEnabled_offset, val);
2672 }
2673
2674 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
2675 o->obj_field_put(packages_offset, val);
2676 }
2677
2678 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
2679 o->obj_field_put(packageEnabled_offset, val);
2680 }
2681
2682 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
2683 o->bool_field_put(deflt_offset, val);
2684 }
2685
2686
2687 // Support for intrinsification of java.nio.Buffer.checkIndex
2688 int java_nio_Buffer::limit_offset() {
2689 return _limit_offset;
2690 }
2691
2692
2693 void java_nio_Buffer::compute_offsets() {
2694 klassOop k = SystemDictionary::java_nio_Buffer_klass();
2695 assert(k != NULL, "must be loaded in 1.4+");
2696 compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature());
2697 }
2698
2699 // Support for intrinsification of sun.misc.AtomicLongCSImpl.attemptUpdate
2700 int sun_misc_AtomicLongCSImpl::value_offset() {
2701 assert(SystemDictionary::sun_misc_AtomicLongCSImpl_klass() != NULL, "can't call this");
2702 return _value_offset;
2703 }
2704
2705
2706 void sun_misc_AtomicLongCSImpl::compute_offsets() {
2707 klassOop k = SystemDictionary::sun_misc_AtomicLongCSImpl_klass();
2708 // If this class is not present, its value field offset won't be referenced.
2709 if (k != NULL) {
2710 compute_offset(_value_offset, k, vmSymbols::value_name(), vmSymbols::long_signature());
2711 }
2712 }
2713
2714 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) {
2715 if (_owner_offset != 0) return;
2716
2717 assert(JDK_Version::is_gte_jdk16x_version(), "Must be JDK 1.6 or later");
2718 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK);
2719 klassOop k = SystemDictionary::abstract_ownable_synchronizer_klass();
2720 compute_offset(_owner_offset, k,
2721 vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature());
2722 }
2723
2724 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
2725 assert(_owner_offset != 0, "Must be initialized");
2726 return obj->obj_field(_owner_offset);
2727 }
2728
2729 // Compute hard-coded offsets
2730 // Invoked before SystemDictionary::initialize, so pre-loaded classes
2731 // are not available to determine the offset_of_static_fields.
2732 void JavaClasses::compute_hard_coded_offsets() {
2733 const int x = heapOopSize;
2734 const int header = instanceOopDesc::base_offset_in_bytes();
2735
2736 // Do the String Class
2737 java_lang_String::value_offset = java_lang_String::hc_value_offset * x + header;
2738 java_lang_String::offset_offset = java_lang_String::hc_offset_offset * x + header;
2739 java_lang_String::count_offset = java_lang_String::offset_offset + sizeof (jint);
2740 java_lang_String::hash_offset = java_lang_String::count_offset + sizeof (jint);
2741
2742 // Do the Class Class
2743 java_lang_Class::klass_offset = java_lang_Class::hc_klass_offset * x + header;
2744 java_lang_Class::array_klass_offset = java_lang_Class::hc_array_klass_offset * x + header;
2745 java_lang_Class::resolved_constructor_offset = java_lang_Class::hc_resolved_constructor_offset * x + header;
2746
2747 // This is NOT an offset
2748 java_lang_Class::number_of_fake_oop_fields = java_lang_Class::hc_number_of_fake_oop_fields;
2749
2750 // Throwable Class
2751 java_lang_Throwable::backtrace_offset = java_lang_Throwable::hc_backtrace_offset * x + header;
2752 java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header;
2753 java_lang_Throwable::cause_offset = java_lang_Throwable::hc_cause_offset * x + header;
2754 java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header;
2755
2756 // java_lang_boxing_object
2757 java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header;
2758 java_lang_boxing_object::long_value_offset = align_size_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong);
2759
2760 // java_lang_ref_Reference:
2761 java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header;
2762 java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header;
2763 java_lang_ref_Reference::next_offset = java_lang_ref_Reference::hc_next_offset * x + header;
2764 java_lang_ref_Reference::discovered_offset = java_lang_ref_Reference::hc_discovered_offset * x + header;
2765 java_lang_ref_Reference::static_lock_offset = java_lang_ref_Reference::hc_static_lock_offset * x;
2766 java_lang_ref_Reference::static_pending_offset = java_lang_ref_Reference::hc_static_pending_offset * x;
2767 // Artificial fields for java_lang_ref_Reference
2768 // The first field is for the discovered field added in 1.4
2769 java_lang_ref_Reference::number_of_fake_oop_fields = 1;
2770
2771 // java_lang_ref_SoftReference Class
2772 java_lang_ref_SoftReference::timestamp_offset = align_size_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong);
2773 // Don't multiply static fields because they are always in wordSize units
2774 java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x;
2775
2776 // java_lang_ClassLoader
2777 java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header;
2778
2779 // java_lang_System
2780 java_lang_System::static_in_offset = java_lang_System::hc_static_in_offset * x;
2781 java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x;
2782 java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x;
2783
2784 // java_lang_StackTraceElement
2785 java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset * x + header;
2786 java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header;
2787 java_lang_StackTraceElement::fileName_offset = java_lang_StackTraceElement::hc_fileName_offset * x + header;
2788 java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header;
2789 java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header;
2790 java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header;
2791 java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header;
2792 java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header;
2793 java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header;
2794
2795 }
2796
2797
2798 // Compute non-hard-coded field offsets of all the classes in this file
2799 void JavaClasses::compute_offsets() {
2800
2801 java_lang_Class::compute_offsets();
2802 java_lang_System::compute_offsets();
2803 java_lang_Thread::compute_offsets();
2804 java_lang_ThreadGroup::compute_offsets();
2805 if (EnableMethodHandles) {
2806 java_dyn_MethodHandle::compute_offsets();
2807 sun_dyn_MemberName::compute_offsets();
2808 sun_dyn_DirectMethodHandle::compute_offsets();
2809 sun_dyn_BoundMethodHandle::compute_offsets();
2810 sun_dyn_AdapterMethodHandle::compute_offsets();
2811 java_dyn_MethodType::compute_offsets();
2812 java_dyn_MethodTypeForm::compute_offsets();
2813 }
2814 if (EnableInvokeDynamic) {
2815 sun_dyn_CallSiteImpl::compute_offsets();
2816 }
2817 java_security_AccessControlContext::compute_offsets();
2818 // Initialize reflection classes. The layouts of these classes
2819 // changed with the new reflection implementation in JDK 1.4, and
2820 // since the Universe doesn't know what JDK version it is until this
2821 // point we defer computation of these offsets until now.
2822 java_lang_reflect_AccessibleObject::compute_offsets();
2823 java_lang_reflect_Method::compute_offsets();
2824 java_lang_reflect_Constructor::compute_offsets();
2825 java_lang_reflect_Field::compute_offsets();
2826 if (JDK_Version::is_gte_jdk14x_version()) {
2827 java_nio_Buffer::compute_offsets();
2828 }
2829 if (JDK_Version::is_gte_jdk15x_version()) {
2830 sun_reflect_ConstantPool::compute_offsets();
2831 sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets();
2832 }
2833 sun_misc_AtomicLongCSImpl::compute_offsets();
2834
2835 // generated interpreter code wants to know about the offsets we just computed:
2836 AbstractAssembler::update_delayed_values();
2837 }
2838
2839 #ifndef PRODUCT
2840
2841 // These functions exist to assert the validity of hard-coded field offsets to guard
2842 // against changes in the class files
2843
2844 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
2845 EXCEPTION_MARK;
2846 fieldDescriptor fd;
2847 symbolHandle klass_sym = oopFactory::new_symbol_handle(klass_name, CATCH);
2848 klassOop k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
2849 instanceKlassHandle h_klass (THREAD, k);
2850 //instanceKlassHandle h_klass(klass);
2851 symbolHandle f_name = oopFactory::new_symbol_handle(field_name, CATCH);
2852 symbolHandle f_sig = oopFactory::new_symbol_handle(field_sig, CATCH);
2853 if (!h_klass->find_local_field(f_name(), f_sig(), &fd)) {
2854 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
2855 return false;
2856 }
2857 if (fd.is_static()) {
2858 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
2859 return false;
2860 }
2861 if (fd.offset() == hardcoded_offset ) {
2862 return true;
2863 } else {
2864 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
2865 klass_name, field_name, hardcoded_offset, fd.offset());
2866 return false;
2867 }
2868 }
2869
2870
2871 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
2872 EXCEPTION_MARK;
2873 fieldDescriptor fd;
2874 symbolHandle klass_sym = oopFactory::new_symbol_handle(klass_name, CATCH);
2875 klassOop k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
2876 instanceKlassHandle h_klass (THREAD, k);
2877 symbolHandle f_name = oopFactory::new_symbol_handle(field_name, CATCH);
2878 symbolHandle f_sig = oopFactory::new_symbol_handle(field_sig, CATCH);
2879 if (!h_klass->find_local_field(f_name(), f_sig(), &fd)) {
2880 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
2881 return false;
2882 }
2883 if (!fd.is_static()) {
2884 tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name);
2885 return false;
2886 }
2887 if (fd.offset() == hardcoded_offset + h_klass->offset_of_static_fields()) {
2888 return true;
2889 } else {
2890 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());
2891 return false;
2892 }
2893 }
2894
2895
2896 bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) {
2897 EXCEPTION_MARK;
2898 fieldDescriptor fd;
2899 symbolHandle klass_sym = oopFactory::new_symbol_handle(klass_name, CATCH);
2900 klassOop k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
2901 instanceKlassHandle h_klass (THREAD, k);
2902 symbolHandle f_name = oopFactory::new_symbol_handle(field_name, CATCH);
2903 symbolHandle f_sig = oopFactory::new_symbol_handle(field_sig, CATCH);
2904 if (!h_klass->find_local_field(f_name(), f_sig(), &fd)) {
2905 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
2906 return false;
2907 }
2908 if (!fd.is_static() || !fd.has_initial_value()) {
2909 tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name);
2910 return false;
2911 }
2912 if (!fd.initial_value_tag().is_int()) {
2913 tty->print_cr("Static field %s.%s is not an int", klass_name, field_name);
2914 return false;
2915 }
2916 jint field_value = fd.int_initial_value();
2917 if (field_value == hardcoded_constant) {
2918 return true;
2919 } else {
2920 tty->print_cr("Constant value of static field %s.%s is hardcoded as %d but should really be %d.", klass_name, field_name, hardcoded_constant, field_value);
2921 return false;
2922 }
2923 }
2924
2925
2926 // Check the hard-coded field offsets of all the classes in this file
2927
2928 void JavaClasses::check_offsets() {
2929 bool valid = true;
2930
2931 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
2932 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
2933
2934 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
2935 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
2936
2937 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
2938 valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig)
2939
2940 #define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \
2941 valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig)
2942
2943 // java.lang.String
2944
2945 CHECK_OFFSET("java/lang/String", java_lang_String, value, "[C");
2946 CHECK_OFFSET("java/lang/String", java_lang_String, offset, "I");
2947 CHECK_OFFSET("java/lang/String", java_lang_String, count, "I");
2948 CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I");
2949
2950 // java.lang.Class
2951
2952 // Fake fields
2953 // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked
2954 // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked
2955 // CHECK_OFFSET("java/lang/Class", java_lang_Class, resolved_constructor); // %%% this needs to be checked
2956
2957 // java.lang.Throwable
2958
2959 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;");
2960 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;");
2961 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, cause, "Ljava/lang/Throwable;");
2962 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;");
2963
2964 // Boxed primitive objects (java_lang_boxing_object)
2965
2966 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
2967 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
2968 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
2969 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
2970 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
2971 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
2972 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
2973 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
2974
2975 // java.lang.ClassLoader
2976
2977 CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent, "Ljava/lang/ClassLoader;");
2978
2979 // java.lang.System
2980
2981 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, in, "Ljava/io/InputStream;");
2982 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;");
2983 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;");
2984
2985 // java.lang.StackTraceElement
2986
2987 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;");
2988 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;");
2989 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, fileName, "Ljava/lang/String;");
2990 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I");
2991
2992 // java.lang.ref.Reference
2993
2994 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
2995 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
2996 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
2997 // Fake field
2998 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
2999 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, lock, "Ljava/lang/ref/Reference$Lock;");
3000 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, pending, "Ljava/lang/ref/Reference;");
3001
3002 // java.lang.ref.SoftReference
3003
3004 CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J");
3005 CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J");
3006
3007 // java.lang.AssertionStatusDirectives
3008 //
3009 // The CheckAssertionStatusDirectives boolean can be removed from here and
3010 // globals.hpp after the AssertionStatusDirectives class has been integrated
3011 // into merlin "for some time." Without it, the vm will fail with early
3012 // merlin builds.
3013
3014 if (CheckAssertionStatusDirectives && JDK_Version::is_gte_jdk14x_version()) {
3015 const char* nm = "java/lang/AssertionStatusDirectives";
3016 const char* sig = "[Ljava/lang/String;";
3017 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig);
3018 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z");
3019 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig);
3020 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z");
3021 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z");
3022 }
3023
3024 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
3025 }
3026
3027 #endif // PRODUCT
3028
3029 void javaClasses_init() {
3030 JavaClasses::compute_offsets();
3031 JavaClasses::check_offsets();
3032 FilteredFieldsMap::initialize(); // must be done after computing offsets.
3033 }