1 /*
2 * Copyright (c) 1997, 2011, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/javaClasses.hpp"
27 #include "classfile/symbolTable.hpp"
28 #include "classfile/vmSymbols.hpp"
29 #include "code/debugInfo.hpp"
30 #include "code/pcDesc.hpp"
31 #include "interpreter/interpreter.hpp"
32 #include "memory/oopFactory.hpp"
33 #include "memory/resourceArea.hpp"
34 #include "memory/universe.inline.hpp"
35 #include "oops/instanceKlass.hpp"
36 #include "oops/instanceMirrorKlass.hpp"
37 #include "oops/klass.hpp"
38 #include "oops/klassOop.hpp"
39 #include "oops/methodOop.hpp"
40 #include "oops/symbol.hpp"
41 #include "oops/typeArrayOop.hpp"
42 #include "runtime/fieldDescriptor.hpp"
43 #include "runtime/handles.inline.hpp"
44 #include "runtime/interfaceSupport.hpp"
45 #include "runtime/java.hpp"
46 #include "runtime/javaCalls.hpp"
47 #include "runtime/safepoint.hpp"
48 #include "runtime/vframe.hpp"
49 #include "utilities/preserveException.hpp"
50 #ifdef TARGET_OS_FAMILY_linux
51 # include "thread_linux.inline.hpp"
52 #endif
53 #ifdef TARGET_OS_FAMILY_solaris
54 # include "thread_solaris.inline.hpp"
55 #endif
56 #ifdef TARGET_OS_FAMILY_windows
57 # include "thread_windows.inline.hpp"
58 #endif
59
60 static bool find_field(instanceKlass* ik,
61 Symbol* name_symbol, Symbol* signature_symbol,
62 fieldDescriptor* fd,
63 bool allow_super = false) {
64 if (allow_super)
65 return ik->find_field(name_symbol, signature_symbol, fd) != NULL;
66 else
67 return ik->find_local_field(name_symbol, signature_symbol, fd);
68 }
69
70 static bool find_hacked_field(instanceKlass* ik,
71 Symbol* name_symbol, Symbol* signature_symbol,
72 fieldDescriptor* fd,
73 bool allow_super = false) {
74 bool found = find_field(ik, name_symbol, signature_symbol, fd, allow_super);
75 if (!found && AllowTransitionalJSR292) {
76 Symbol* backup_sig = SystemDictionary::find_backup_signature(signature_symbol);
77 if (backup_sig != NULL) {
78 found = find_field(ik, name_symbol, backup_sig, fd, allow_super);
79 if (TraceMethodHandles) {
80 ResourceMark rm;
81 tty->print_cr("MethodHandles: %s.%s: backup for %s => %s%s",
82 ik->name()->as_C_string(), name_symbol->as_C_string(),
83 signature_symbol->as_C_string(), backup_sig->as_C_string(),
84 (found ? "" : " (NOT FOUND)"));
85 }
86 }
87 }
88 return found;
89 }
90 #define find_field find_hacked_field /* remove after AllowTransitionalJSR292 */
91
92 // Helpful routine for computing field offsets at run time rather than hardcoding them
93 static void
94 compute_offset(int &dest_offset,
95 klassOop klass_oop, Symbol* name_symbol, Symbol* signature_symbol,
96 bool allow_super = false) {
97 fieldDescriptor fd;
98 instanceKlass* ik = instanceKlass::cast(klass_oop);
99 if (!find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) {
100 ResourceMark rm;
101 tty->print_cr("Invalid layout of %s at %s", ik->external_name(), name_symbol->as_C_string());
102 fatal("Invalid layout of preloaded class");
103 }
104 dest_offset = fd.offset();
105 }
106
107 // Same as above but for "optional" offsets that might not be present in certain JDK versions
108 static void
109 compute_optional_offset(int& dest_offset,
110 klassOop klass_oop, Symbol* name_symbol, Symbol* signature_symbol,
111 bool allow_super = false) {
112 fieldDescriptor fd;
113 instanceKlass* ik = instanceKlass::cast(klass_oop);
114 if (find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) {
115 dest_offset = fd.offset();
116 }
117 }
118
119
120 Handle java_lang_String::basic_create(int length, bool tenured, TRAPS) {
121 // Create the String object first, so there's a chance that the String
122 // and the char array it points to end up in the same cache line.
123 oop obj;
124 if (tenured) {
125 obj = instanceKlass::cast(SystemDictionary::String_klass())->allocate_permanent_instance(CHECK_NH);
126 } else {
127 obj = instanceKlass::cast(SystemDictionary::String_klass())->allocate_instance(CHECK_NH);
128 }
129
130 // Create the char array. The String object must be handlized here
131 // because GC can happen as a result of the allocation attempt.
132 Handle h_obj(THREAD, obj);
133 typeArrayOop buffer;
134 if (tenured) {
135 buffer = oopFactory::new_permanent_charArray(length, CHECK_NH);
136 } else {
137 buffer = oopFactory::new_charArray(length, CHECK_NH);
138 }
139
140 // Point the String at the char array
141 obj = h_obj();
142 set_value(obj, buffer);
143 // No need to zero the offset, allocation zero'ed the entire String object
144 assert(offset(obj) == 0, "initial String offset should be zero");
145 //set_offset(obj, 0);
146 set_count(obj, length);
147
148 return h_obj;
149 }
150
151 Handle java_lang_String::basic_create_from_unicode(jchar* unicode, int length, bool tenured, TRAPS) {
152 Handle h_obj = basic_create(length, tenured, CHECK_NH);
153 typeArrayOop buffer = value(h_obj());
154 for (int index = 0; index < length; index++) {
155 buffer->char_at_put(index, unicode[index]);
156 }
157 return h_obj;
158 }
159
160 Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) {
161 return basic_create_from_unicode(unicode, length, false, CHECK_NH);
162 }
163
164 Handle java_lang_String::create_tenured_from_unicode(jchar* unicode, int length, TRAPS) {
165 return basic_create_from_unicode(unicode, length, JavaObjectsInPerm, CHECK_NH);
166 }
167
168 oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) {
169 Handle h_obj = basic_create_from_unicode(unicode, length, false, CHECK_0);
170 return h_obj();
171 }
172
173 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
174 if (utf8_str == NULL) {
175 return Handle();
176 }
177 int length = UTF8::unicode_length(utf8_str);
178 Handle h_obj = basic_create(length, false, CHECK_NH);
179 if (length > 0) {
180 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
181 }
182 return h_obj;
183 }
184
185 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
186 Handle h_obj = create_from_str(utf8_str, CHECK_0);
187 return h_obj();
188 }
189
190 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) {
191 int length = UTF8::unicode_length((char*)symbol->bytes(), symbol->utf8_length());
192 Handle h_obj = basic_create(length, false, CHECK_NH);
193 if (length > 0) {
194 UTF8::convert_to_unicode((char*)symbol->bytes(), value(h_obj())->char_at_addr(0), length);
195 }
196 return h_obj;
197 }
198
199 // Converts a C string to a Java String based on current encoding
200 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
201 assert(str != NULL, "bad arguments");
202
203 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *);
204 static to_java_string_fn_t _to_java_string_fn = NULL;
205
206 if (_to_java_string_fn == NULL) {
207 void *lib_handle = os::native_java_library();
208 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform"));
209 if (_to_java_string_fn == NULL) {
210 fatal("NewStringPlatform missing");
211 }
212 }
213
214 jstring js = NULL;
215 { JavaThread* thread = (JavaThread*)THREAD;
216 assert(thread->is_Java_thread(), "must be java thread");
217 HandleMark hm(thread);
218 ThreadToNativeFromVM ttn(thread);
219 js = (_to_java_string_fn)(thread->jni_environment(), str);
220 }
221 return Handle(THREAD, JNIHandles::resolve(js));
222 }
223
224 // Converts a Java String to a native C string that can be used for
225 // native OS calls.
226 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
227
228 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
229 static to_platform_string_fn_t _to_platform_string_fn = NULL;
230
231 if (_to_platform_string_fn == NULL) {
232 void *lib_handle = os::native_java_library();
233 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
234 if (_to_platform_string_fn == NULL) {
235 fatal("GetStringPlatformChars missing");
236 }
237 }
238
239 char *native_platform_string;
240 { JavaThread* thread = (JavaThread*)THREAD;
241 assert(thread->is_Java_thread(), "must be java thread");
242 JNIEnv *env = thread->jni_environment();
243 jstring js = (jstring) JNIHandles::make_local(env, java_string());
244 bool is_copy;
245 HandleMark hm(thread);
246 ThreadToNativeFromVM ttn(thread);
247 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
248 assert(is_copy == JNI_TRUE, "is_copy value changed");
249 JNIHandles::destroy_local(js);
250 }
251 return native_platform_string;
252 }
253
254 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) {
255 oop obj = java_string();
256 // Typical usage is to convert all '/' to '.' in string.
257 typeArrayOop value = java_lang_String::value(obj);
258 int offset = java_lang_String::offset(obj);
259 int length = java_lang_String::length(obj);
260
261 // First check if any from_char exist
262 int index; // Declared outside, used later
263 for (index = 0; index < length; index++) {
264 if (value->char_at(index + offset) == from_char) {
265 break;
266 }
267 }
268 if (index == length) {
269 // No from_char, so do not copy.
270 return java_string;
271 }
272
273 // Create new UNICODE buffer. Must handlize value because GC
274 // may happen during String and char array creation.
275 typeArrayHandle h_value(THREAD, value);
276 Handle string = basic_create(length, false, CHECK_NH);
277
278 typeArrayOop from_buffer = h_value();
279 typeArrayOop to_buffer = java_lang_String::value(string());
280
281 // Copy contents
282 for (index = 0; index < length; index++) {
283 jchar c = from_buffer->char_at(index + offset);
284 if (c == from_char) {
285 c = to_char;
286 }
287 to_buffer->char_at_put(index, c);
288 }
289 return string;
290 }
291
292 jchar* java_lang_String::as_unicode_string(oop java_string, int& length) {
293 typeArrayOop value = java_lang_String::value(java_string);
294 int offset = java_lang_String::offset(java_string);
295 length = java_lang_String::length(java_string);
296
297 jchar* result = NEW_RESOURCE_ARRAY(jchar, length);
298 for (int index = 0; index < length; index++) {
299 result[index] = value->char_at(index + offset);
300 }
301 return result;
302 }
303
304 Symbol* java_lang_String::as_symbol(Handle java_string, TRAPS) {
305 oop obj = java_string();
306 typeArrayOop value = java_lang_String::value(obj);
307 int offset = java_lang_String::offset(obj);
308 int length = java_lang_String::length(obj);
309 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
310 Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD);
311 return sym;
312 }
313
314 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
315 typeArrayOop value = java_lang_String::value(java_string);
316 int offset = java_lang_String::offset(java_string);
317 int length = java_lang_String::length(java_string);
318 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
319 return SymbolTable::probe_unicode(base, length);
320 }
321
322
323 int java_lang_String::utf8_length(oop java_string) {
324 typeArrayOop value = java_lang_String::value(java_string);
325 int offset = java_lang_String::offset(java_string);
326 int length = java_lang_String::length(java_string);
327 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
328 return UNICODE::utf8_length(position, length);
329 }
330
331 char* java_lang_String::as_utf8_string(oop java_string) {
332 typeArrayOop value = java_lang_String::value(java_string);
333 int offset = java_lang_String::offset(java_string);
334 int length = java_lang_String::length(java_string);
335 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
336 return UNICODE::as_utf8(position, length);
337 }
338
339 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) {
340 typeArrayOop value = java_lang_String::value(java_string);
341 int offset = java_lang_String::offset(java_string);
342 int length = java_lang_String::length(java_string);
343 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
344 return UNICODE::as_utf8(position, length, buf, buflen);
345 }
346
347 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
348 typeArrayOop value = java_lang_String::value(java_string);
349 int offset = java_lang_String::offset(java_string);
350 int length = java_lang_String::length(java_string);
351 assert(start + len <= length, "just checking");
352 jchar* position = value->char_at_addr(offset + start);
353 return UNICODE::as_utf8(position, len);
354 }
355
356 bool java_lang_String::equals(oop java_string, jchar* chars, int len) {
357 assert(SharedSkipVerify ||
358 java_string->klass() == SystemDictionary::String_klass(),
359 "must be java_string");
360 typeArrayOop value = java_lang_String::value(java_string);
361 int offset = java_lang_String::offset(java_string);
362 int length = java_lang_String::length(java_string);
363 if (length != len) {
364 return false;
365 }
366 for (int i = 0; i < len; i++) {
367 if (value->char_at(i + offset) != chars[i]) {
368 return false;
369 }
370 }
371 return true;
372 }
373
374 void java_lang_String::print(Handle java_string, outputStream* st) {
375 oop obj = java_string();
376 assert(obj->klass() == SystemDictionary::String_klass(), "must be java_string");
377 typeArrayOop value = java_lang_String::value(obj);
378 int offset = java_lang_String::offset(obj);
379 int length = java_lang_String::length(obj);
380
381 int end = MIN2(length, 100);
382 if (value == NULL) {
383 // This can happen if, e.g., printing a String
384 // object before its initializer has been called
385 st->print_cr("NULL");
386 } else {
387 st->print("\"");
388 for (int index = 0; index < length; index++) {
389 st->print("%c", value->char_at(index + offset));
390 }
391 st->print("\"");
392 }
393 }
394
395 static void initialize_static_field(fieldDescriptor* fd, TRAPS) {
396 Handle mirror (THREAD, fd->field_holder()->java_mirror());
397 assert(mirror.not_null() && fd->is_static(), "just checking");
398 if (fd->has_initial_value()) {
399 BasicType t = fd->field_type();
400 switch (t) {
401 case T_BYTE:
402 mirror()->byte_field_put(fd->offset(), fd->int_initial_value());
403 break;
404 case T_BOOLEAN:
405 mirror()->bool_field_put(fd->offset(), fd->int_initial_value());
406 break;
407 case T_CHAR:
408 mirror()->char_field_put(fd->offset(), fd->int_initial_value());
409 break;
410 case T_SHORT:
411 mirror()->short_field_put(fd->offset(), fd->int_initial_value());
412 break;
413 case T_INT:
414 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
415 break;
416 case T_FLOAT:
417 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
418 break;
419 case T_DOUBLE:
420 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
421 break;
422 case T_LONG:
423 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
424 break;
425 case T_OBJECT:
426 {
427 #ifdef ASSERT
428 TempNewSymbol sym = SymbolTable::new_symbol("Ljava/lang/String;", CHECK);
429 assert(fd->signature() == sym, "just checking");
430 #endif
431 oop string = fd->string_initial_value(CHECK);
432 mirror()->obj_field_put(fd->offset(), string);
433 }
434 break;
435 default:
436 THROW_MSG(vmSymbols::java_lang_ClassFormatError(),
437 "Illegal ConstantValue attribute in class file");
438 }
439 }
440 }
441
442
443 // During bootstrap, java.lang.Class wasn't loaded so static field
444 // offsets were computed without the size added it. Go back and
445 // update all the static field offsets to included the size.
446 static void fixup_static_field(fieldDescriptor* fd, TRAPS) {
447 if (fd->is_static()) {
448 int real_offset = fd->offset() + instanceMirrorKlass::offset_of_static_fields();
449 typeArrayOop fields = instanceKlass::cast(fd->field_holder())->fields();
450 fields->short_at_put(fd->index() + instanceKlass::low_offset, extract_low_short_from_int(real_offset));
451 fields->short_at_put(fd->index() + instanceKlass::high_offset, extract_high_short_from_int(real_offset));
452 }
453 }
454
455 void java_lang_Class::fixup_mirror(KlassHandle k, TRAPS) {
456 assert(instanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
457
458 if (k->oop_is_instance()) {
459 // Fixup the offsets
460 instanceKlass::cast(k())->do_local_static_fields(&fixup_static_field, CHECK);
461 }
462 create_mirror(k, CHECK);
463 }
464
465 oop java_lang_Class::create_mirror(KlassHandle k, TRAPS) {
466 assert(k->java_mirror() == NULL, "should only assign mirror once");
467 // Use this moment of initialization to cache modifier_flags also,
468 // to support Class.getModifiers(). Instance classes recalculate
469 // the cached flags after the class file is parsed, but before the
470 // class is put into the system dictionary.
471 int computed_modifiers = k->compute_modifier_flags(CHECK_0);
472 k->set_modifier_flags(computed_modifiers);
473 if (SystemDictionary::Class_klass_loaded() && (k->oop_is_instance() || k->oop_is_javaArray())) {
474 // Allocate mirror (java.lang.Class instance)
475 Handle mirror = instanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK_0);
476 // Setup indirections
477 mirror->obj_field_put(klass_offset, k());
478 k->set_java_mirror(mirror());
479
480 instanceMirrorKlass* mk = instanceMirrorKlass::cast(mirror->klass());
481 java_lang_Class::set_oop_size(mirror(), mk->instance_size(k));
482 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
483
484 // It might also have a component mirror. This mirror must already exist.
485 if (k->oop_is_javaArray()) {
486 Handle comp_mirror;
487 if (k->oop_is_typeArray()) {
488 BasicType type = typeArrayKlass::cast(k->as_klassOop())->element_type();
489 comp_mirror = Universe::java_mirror(type);
490 assert(comp_mirror.not_null(), "must have primitive mirror");
491 } else if (k->oop_is_objArray()) {
492 klassOop element_klass = objArrayKlass::cast(k->as_klassOop())->element_klass();
493 if (element_klass != NULL
494 && (Klass::cast(element_klass)->oop_is_instance() ||
495 Klass::cast(element_klass)->oop_is_javaArray())) {
496 comp_mirror = Klass::cast(element_klass)->java_mirror();
497 assert(comp_mirror.not_null(), "must have element mirror");
498 }
499 // else some object array internal to the VM, like systemObjArrayKlassObj
500 }
501 if (comp_mirror.not_null()) {
502 // Two-way link between the array klass and its component mirror:
503 arrayKlass::cast(k->as_klassOop())->set_component_mirror(comp_mirror());
504 set_array_klass(comp_mirror(), k->as_klassOop());
505 }
506 } else if (k->oop_is_instance()) {
507 // Initialize static fields
508 instanceKlass::cast(k())->do_local_static_fields(&initialize_static_field, CHECK_NULL);
509 }
510 return mirror();
511 } else {
512 return NULL;
513 }
514 }
515
516
517
518 int java_lang_Class::oop_size(oop java_class) {
519 assert(oop_size_offset != 0, "must be set");
520 return java_class->int_field(oop_size_offset);
521 }
522 void java_lang_Class::set_oop_size(oop java_class, int size) {
523 assert(oop_size_offset != 0, "must be set");
524 java_class->int_field_put(oop_size_offset, size);
525 }
526 int java_lang_Class::static_oop_field_count(oop java_class) {
527 assert(static_oop_field_count_offset != 0, "must be set");
528 return java_class->int_field(static_oop_field_count_offset);
529 }
530 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
531 assert(static_oop_field_count_offset != 0, "must be set");
532 java_class->int_field_put(static_oop_field_count_offset, size);
533 }
534
535
536
537
538 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
539 // This should be improved by adding a field at the Java level or by
540 // introducing a new VM klass (see comment in ClassFileParser)
541 oop java_class = instanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance((oop)NULL, CHECK_0);
542 if (type != T_VOID) {
543 klassOop aklass = Universe::typeArrayKlassObj(type);
544 assert(aklass != NULL, "correct bootstrap");
545 set_array_klass(java_class, aklass);
546 }
547 instanceMirrorKlass* mk = instanceMirrorKlass::cast(SystemDictionary::Class_klass());
548 java_lang_Class::set_oop_size(java_class, mk->instance_size(oop(NULL)));
549 java_lang_Class::set_static_oop_field_count(java_class, 0);
550 return java_class;
551 }
552
553
554 klassOop java_lang_Class::as_klassOop(oop java_class) {
555 //%note memory_2
556 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
557 klassOop k = klassOop(java_class->obj_field(klass_offset));
558 assert(k == NULL || k->is_klass(), "type check");
559 return k;
560 }
561
562
563 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
564 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
565 Symbol* name = NULL;
566 bool is_instance = false;
567 if (is_primitive(java_class)) {
568 name = vmSymbols::type_signature(primitive_type(java_class));
569 } else {
570 klassOop k = as_klassOop(java_class);
571 is_instance = Klass::cast(k)->oop_is_instance();
572 name = Klass::cast(k)->name();
573 }
574 if (name == NULL) {
575 st->print("<null>");
576 return;
577 }
578 if (is_instance) st->print("L");
579 st->write((char*) name->base(), (int) name->utf8_length());
580 if (is_instance) st->print(";");
581 }
582
583 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) {
584 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
585 Symbol* name;
586 if (is_primitive(java_class)) {
587 name = vmSymbols::type_signature(primitive_type(java_class));
588 // Because this can create a new symbol, the caller has to decrement
589 // the refcount, so make adjustment here and below for symbols returned
590 // that are not created or incremented due to a successful lookup.
591 name->increment_refcount();
592 } else {
593 klassOop k = as_klassOop(java_class);
594 if (!Klass::cast(k)->oop_is_instance()) {
595 name = Klass::cast(k)->name();
596 name->increment_refcount();
597 } else {
598 ResourceMark rm;
599 const char* sigstr = Klass::cast(k)->signature_name();
600 int siglen = (int) strlen(sigstr);
601 if (!intern_if_not_found) {
602 name = SymbolTable::probe(sigstr, siglen);
603 } else {
604 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
605 }
606 }
607 }
608 return name;
609 }
610
611
612 klassOop java_lang_Class::array_klass(oop java_class) {
613 klassOop k = klassOop(java_class->obj_field(array_klass_offset));
614 assert(k == NULL || k->is_klass() && Klass::cast(k)->oop_is_javaArray(), "should be array klass");
615 return k;
616 }
617
618
619 void java_lang_Class::set_array_klass(oop java_class, klassOop klass) {
620 assert(klass->is_klass() && Klass::cast(klass)->oop_is_javaArray(), "should be array klass");
621 java_class->obj_field_put(array_klass_offset, klass);
622 }
623
624
625 methodOop java_lang_Class::resolved_constructor(oop java_class) {
626 oop constructor = java_class->obj_field(resolved_constructor_offset);
627 assert(constructor == NULL || constructor->is_method(), "should be method");
628 return methodOop(constructor);
629 }
630
631
632 void java_lang_Class::set_resolved_constructor(oop java_class, methodOop constructor) {
633 assert(constructor->is_method(), "should be method");
634 java_class->obj_field_put(resolved_constructor_offset, constructor);
635 }
636
637
638 bool java_lang_Class::is_primitive(oop java_class) {
639 // should assert:
640 //assert(java_lang_Class::is_instance(java_class), "must be a Class object");
641 klassOop k = klassOop(java_class->obj_field(klass_offset));
642 return k == NULL;
643 }
644
645
646 BasicType java_lang_Class::primitive_type(oop java_class) {
647 assert(java_lang_Class::is_primitive(java_class), "just checking");
648 klassOop ak = klassOop(java_class->obj_field(array_klass_offset));
649 BasicType type = T_VOID;
650 if (ak != NULL) {
651 // Note: create_basic_type_mirror above initializes ak to a non-null value.
652 type = arrayKlass::cast(ak)->element_type();
653 } else {
654 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
655 }
656 assert(Universe::java_mirror(type) == java_class, "must be consistent");
657 return type;
658 }
659
660 BasicType java_lang_Class::as_BasicType(oop java_class, klassOop* reference_klass) {
661 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
662 if (is_primitive(java_class)) {
663 if (reference_klass != NULL)
664 (*reference_klass) = NULL;
665 return primitive_type(java_class);
666 } else {
667 if (reference_klass != NULL)
668 (*reference_klass) = as_klassOop(java_class);
669 return T_OBJECT;
670 }
671 }
672
673
674 oop java_lang_Class::primitive_mirror(BasicType t) {
675 oop mirror = Universe::java_mirror(t);
676 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class");
677 assert(java_lang_Class::is_primitive(mirror), "must be primitive");
678 return mirror;
679 }
680
681 bool java_lang_Class::offsets_computed = false;
682 int java_lang_Class::classRedefinedCount_offset = -1;
683 int java_lang_Class::parallelCapable_offset = -1;
684
685 void java_lang_Class::compute_offsets() {
686 assert(!offsets_computed, "offsets should be initialized only once");
687 offsets_computed = true;
688
689 klassOop k = SystemDictionary::Class_klass();
690 // The classRedefinedCount field is only present starting in 1.5,
691 // so don't go fatal.
692 compute_optional_offset(classRedefinedCount_offset,
693 k, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature());
694
695 // The field indicating parallelCapable (parallelLockMap) is only present starting in 7,
696 klassOop k1 = SystemDictionary::ClassLoader_klass();
697 compute_optional_offset(parallelCapable_offset,
698 k1, vmSymbols::parallelCapable_name(), vmSymbols::concurrenthashmap_signature());
699 }
700
701 // For class loader classes, parallelCapable defined
702 // based on non-null field
703 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
704 bool java_lang_Class::parallelCapable(oop class_loader) {
705 if (!JDK_Version::is_gte_jdk17x_version()
706 || parallelCapable_offset == -1) {
707 // Default for backward compatibility is false
708 return false;
709 }
710 return (class_loader->obj_field(parallelCapable_offset) != NULL);
711 }
712
713 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
714 if (!JDK_Version::is_gte_jdk15x_version()
715 || classRedefinedCount_offset == -1) {
716 // The classRedefinedCount field is only present starting in 1.5.
717 // If we don't have an offset for it then just return -1 as a marker.
718 return -1;
719 }
720
721 return the_class_mirror->int_field(classRedefinedCount_offset);
722 }
723
724 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
725 if (!JDK_Version::is_gte_jdk15x_version()
726 || classRedefinedCount_offset == -1) {
727 // The classRedefinedCount field is only present starting in 1.5.
728 // If we don't have an offset for it then nothing to set.
729 return;
730 }
731
732 the_class_mirror->int_field_put(classRedefinedCount_offset, value);
733 }
734
735
736 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
737 // platform thread structure, and a eetop offset which was used for thread
738 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
739 // merged, so in the HotSpot VM we just use the eetop field for the thread
740 // instead of the privateInfo_offset.
741 //
742 // Note: The stackSize field is only present starting in 1.4.
743
744 int java_lang_Thread::_name_offset = 0;
745 int java_lang_Thread::_group_offset = 0;
746 int java_lang_Thread::_contextClassLoader_offset = 0;
747 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
748 int java_lang_Thread::_priority_offset = 0;
749 int java_lang_Thread::_eetop_offset = 0;
750 int java_lang_Thread::_daemon_offset = 0;
751 int java_lang_Thread::_stillborn_offset = 0;
752 int java_lang_Thread::_stackSize_offset = 0;
753 int java_lang_Thread::_tid_offset = 0;
754 int java_lang_Thread::_thread_status_offset = 0;
755 int java_lang_Thread::_park_blocker_offset = 0;
756 int java_lang_Thread::_park_event_offset = 0 ;
757
758
759 void java_lang_Thread::compute_offsets() {
760 assert(_group_offset == 0, "offsets should be initialized only once");
761
762 klassOop k = SystemDictionary::Thread_klass();
763 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::char_array_signature());
764 compute_offset(_group_offset, k, vmSymbols::group_name(), vmSymbols::threadgroup_signature());
765 compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature());
766 compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature());
767 compute_offset(_priority_offset, k, vmSymbols::priority_name(), vmSymbols::int_signature());
768 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
769 compute_offset(_eetop_offset, k, vmSymbols::eetop_name(), vmSymbols::long_signature());
770 compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature());
771 // The stackSize field is only present starting in 1.4, so don't go fatal.
772 compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature());
773 // The tid and thread_status fields are only present starting in 1.5, so don't go fatal.
774 compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature());
775 compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature());
776 // The parkBlocker field is only present starting in 1.6, so don't go fatal.
777 compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature());
778 compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(),
779 vmSymbols::long_signature());
780 }
781
782
783 JavaThread* java_lang_Thread::thread(oop java_thread) {
784 return (JavaThread*)java_thread->address_field(_eetop_offset);
785 }
786
787
788 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
789 java_thread->address_field_put(_eetop_offset, (address)thread);
790 }
791
792
793 typeArrayOop java_lang_Thread::name(oop java_thread) {
794 oop name = java_thread->obj_field(_name_offset);
795 assert(name == NULL || (name->is_typeArray() && typeArrayKlass::cast(name->klass())->element_type() == T_CHAR), "just checking");
796 return typeArrayOop(name);
797 }
798
799
800 void java_lang_Thread::set_name(oop java_thread, typeArrayOop name) {
801 assert(java_thread->obj_field(_name_offset) == NULL, "name should be NULL");
802 java_thread->obj_field_put(_name_offset, name);
803 }
804
805
806 ThreadPriority java_lang_Thread::priority(oop java_thread) {
807 return (ThreadPriority)java_thread->int_field(_priority_offset);
808 }
809
810
811 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
812 java_thread->int_field_put(_priority_offset, priority);
813 }
814
815
816 oop java_lang_Thread::threadGroup(oop java_thread) {
817 return java_thread->obj_field(_group_offset);
818 }
819
820
821 bool java_lang_Thread::is_stillborn(oop java_thread) {
822 return java_thread->bool_field(_stillborn_offset) != 0;
823 }
824
825
826 // We never have reason to turn the stillborn bit off
827 void java_lang_Thread::set_stillborn(oop java_thread) {
828 java_thread->bool_field_put(_stillborn_offset, true);
829 }
830
831
832 bool java_lang_Thread::is_alive(oop java_thread) {
833 JavaThread* thr = java_lang_Thread::thread(java_thread);
834 return (thr != NULL);
835 }
836
837
838 bool java_lang_Thread::is_daemon(oop java_thread) {
839 return java_thread->bool_field(_daemon_offset) != 0;
840 }
841
842
843 void java_lang_Thread::set_daemon(oop java_thread) {
844 java_thread->bool_field_put(_daemon_offset, true);
845 }
846
847 oop java_lang_Thread::context_class_loader(oop java_thread) {
848 return java_thread->obj_field(_contextClassLoader_offset);
849 }
850
851 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
852 return java_thread->obj_field(_inheritedAccessControlContext_offset);
853 }
854
855
856 jlong java_lang_Thread::stackSize(oop java_thread) {
857 // The stackSize field is only present starting in 1.4
858 if (_stackSize_offset > 0) {
859 assert(JDK_Version::is_gte_jdk14x_version(), "sanity check");
860 return java_thread->long_field(_stackSize_offset);
861 } else {
862 return 0;
863 }
864 }
865
866 // Write the thread status value to threadStatus field in java.lang.Thread java class.
867 void java_lang_Thread::set_thread_status(oop java_thread,
868 java_lang_Thread::ThreadStatus status) {
869 assert(JavaThread::current()->thread_state() == _thread_in_vm, "Java Thread is not running in vm");
870 // The threadStatus is only present starting in 1.5
871 if (_thread_status_offset > 0) {
872 java_thread->int_field_put(_thread_status_offset, status);
873 }
874 }
875
876 // Read thread status value from threadStatus field in java.lang.Thread java class.
877 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
878 assert(Thread::current()->is_VM_thread() ||
879 JavaThread::current()->thread_state() == _thread_in_vm,
880 "Java Thread is not running in vm");
881 // The threadStatus is only present starting in 1.5
882 if (_thread_status_offset > 0) {
883 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
884 } else {
885 // All we can easily figure out is if it is alive, but that is
886 // enough info for a valid unknown status.
887 // These aren't restricted to valid set ThreadStatus values, so
888 // use JVMTI values and cast.
889 JavaThread* thr = java_lang_Thread::thread(java_thread);
890 if (thr == NULL) {
891 // the thread hasn't run yet or is in the process of exiting
892 return NEW;
893 }
894 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE;
895 }
896 }
897
898
899 jlong java_lang_Thread::thread_id(oop java_thread) {
900 // The thread ID field is only present starting in 1.5
901 if (_tid_offset > 0) {
902 return java_thread->long_field(_tid_offset);
903 } else {
904 return 0;
905 }
906 }
907
908 oop java_lang_Thread::park_blocker(oop java_thread) {
909 assert(JDK_Version::current().supports_thread_park_blocker() &&
910 _park_blocker_offset != 0, "Must support parkBlocker field");
911
912 if (_park_blocker_offset > 0) {
913 return java_thread->obj_field(_park_blocker_offset);
914 }
915
916 return NULL;
917 }
918
919 jlong java_lang_Thread::park_event(oop java_thread) {
920 if (_park_event_offset > 0) {
921 return java_thread->long_field(_park_event_offset);
922 }
923 return 0;
924 }
925
926 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) {
927 if (_park_event_offset > 0) {
928 java_thread->long_field_put(_park_event_offset, ptr);
929 return true;
930 }
931 return false;
932 }
933
934
935 const char* java_lang_Thread::thread_status_name(oop java_thread) {
936 assert(JDK_Version::is_gte_jdk15x_version() && _thread_status_offset != 0, "Must have thread status");
937 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
938 switch (status) {
939 case NEW : return "NEW";
940 case RUNNABLE : return "RUNNABLE";
941 case SLEEPING : return "TIMED_WAITING (sleeping)";
942 case IN_OBJECT_WAIT : return "WAITING (on object monitor)";
943 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
944 case PARKED : return "WAITING (parking)";
945 case PARKED_TIMED : return "TIMED_WAITING (parking)";
946 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
947 case TERMINATED : return "TERMINATED";
948 default : return "UNKNOWN";
949 };
950 }
951 int java_lang_ThreadGroup::_parent_offset = 0;
952 int java_lang_ThreadGroup::_name_offset = 0;
953 int java_lang_ThreadGroup::_threads_offset = 0;
954 int java_lang_ThreadGroup::_groups_offset = 0;
955 int java_lang_ThreadGroup::_maxPriority_offset = 0;
956 int java_lang_ThreadGroup::_destroyed_offset = 0;
957 int java_lang_ThreadGroup::_daemon_offset = 0;
958 int java_lang_ThreadGroup::_vmAllowSuspension_offset = 0;
959 int java_lang_ThreadGroup::_nthreads_offset = 0;
960 int java_lang_ThreadGroup::_ngroups_offset = 0;
961
962 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
963 assert(java_thread_group->is_oop(), "thread group must be oop");
964 return java_thread_group->obj_field(_parent_offset);
965 }
966
967 // ("name as oop" accessor is not necessary)
968
969 typeArrayOop java_lang_ThreadGroup::name(oop java_thread_group) {
970 oop name = java_thread_group->obj_field(_name_offset);
971 // ThreadGroup.name can be null
972 return name == NULL ? (typeArrayOop)NULL : java_lang_String::value(name);
973 }
974
975 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
976 assert(java_thread_group->is_oop(), "thread group must be oop");
977 return java_thread_group->int_field(_nthreads_offset);
978 }
979
980 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
981 oop threads = java_thread_group->obj_field(_threads_offset);
982 assert(threads != NULL, "threadgroups should have threads");
983 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
984 return objArrayOop(threads);
985 }
986
987 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
988 assert(java_thread_group->is_oop(), "thread group must be oop");
989 return java_thread_group->int_field(_ngroups_offset);
990 }
991
992 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
993 oop groups = java_thread_group->obj_field(_groups_offset);
994 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
995 return objArrayOop(groups);
996 }
997
998 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
999 assert(java_thread_group->is_oop(), "thread group must be oop");
1000 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1001 }
1002
1003 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
1004 assert(java_thread_group->is_oop(), "thread group must be oop");
1005 return java_thread_group->bool_field(_destroyed_offset) != 0;
1006 }
1007
1008 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1009 assert(java_thread_group->is_oop(), "thread group must be oop");
1010 return java_thread_group->bool_field(_daemon_offset) != 0;
1011 }
1012
1013 bool java_lang_ThreadGroup::is_vmAllowSuspension(oop java_thread_group) {
1014 assert(java_thread_group->is_oop(), "thread group must be oop");
1015 return java_thread_group->bool_field(_vmAllowSuspension_offset) != 0;
1016 }
1017
1018 void java_lang_ThreadGroup::compute_offsets() {
1019 assert(_parent_offset == 0, "offsets should be initialized only once");
1020
1021 klassOop k = SystemDictionary::ThreadGroup_klass();
1022
1023 compute_offset(_parent_offset, k, vmSymbols::parent_name(), vmSymbols::threadgroup_signature());
1024 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1025 compute_offset(_threads_offset, k, vmSymbols::threads_name(), vmSymbols::thread_array_signature());
1026 compute_offset(_groups_offset, k, vmSymbols::groups_name(), vmSymbols::threadgroup_array_signature());
1027 compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature());
1028 compute_offset(_destroyed_offset, k, vmSymbols::destroyed_name(), vmSymbols::bool_signature());
1029 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
1030 compute_offset(_vmAllowSuspension_offset, k, vmSymbols::vmAllowSuspension_name(), vmSymbols::bool_signature());
1031 compute_offset(_nthreads_offset, k, vmSymbols::nthreads_name(), vmSymbols::int_signature());
1032 compute_offset(_ngroups_offset, k, vmSymbols::ngroups_name(), vmSymbols::int_signature());
1033 }
1034
1035 oop java_lang_Throwable::backtrace(oop throwable) {
1036 return throwable->obj_field_acquire(backtrace_offset);
1037 }
1038
1039
1040 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
1041 throwable->release_obj_field_put(backtrace_offset, value);
1042 }
1043
1044
1045 oop java_lang_Throwable::message(oop throwable) {
1046 return throwable->obj_field(detailMessage_offset);
1047 }
1048
1049
1050 oop java_lang_Throwable::message(Handle throwable) {
1051 return throwable->obj_field(detailMessage_offset);
1052 }
1053
1054
1055 void java_lang_Throwable::set_message(oop throwable, oop value) {
1056 throwable->obj_field_put(detailMessage_offset, value);
1057 }
1058
1059
1060 void java_lang_Throwable::clear_stacktrace(oop throwable) {
1061 assert(JDK_Version::is_gte_jdk14x_version(), "should only be called in >= 1.4");
1062 throwable->obj_field_put(stackTrace_offset, NULL);
1063 }
1064
1065
1066 void java_lang_Throwable::print(oop throwable, outputStream* st) {
1067 ResourceMark rm;
1068 klassOop k = throwable->klass();
1069 assert(k != NULL, "just checking");
1070 st->print("%s", instanceKlass::cast(k)->external_name());
1071 oop msg = message(throwable);
1072 if (msg != NULL) {
1073 st->print(": %s", java_lang_String::as_utf8_string(msg));
1074 }
1075 }
1076
1077
1078 void java_lang_Throwable::print(Handle throwable, outputStream* st) {
1079 ResourceMark rm;
1080 klassOop k = throwable->klass();
1081 assert(k != NULL, "just checking");
1082 st->print("%s", instanceKlass::cast(k)->external_name());
1083 oop msg = message(throwable);
1084 if (msg != NULL) {
1085 st->print(": %s", java_lang_String::as_utf8_string(msg));
1086 }
1087 }
1088
1089 // Print stack trace element to resource allocated buffer
1090 char* java_lang_Throwable::print_stack_element_to_buffer(methodOop method, int bci) {
1091 // Get strings and string lengths
1092 instanceKlass* klass = instanceKlass::cast(method->method_holder());
1093 const char* klass_name = klass->external_name();
1094 int buf_len = (int)strlen(klass_name);
1095 char* source_file_name;
1096 if (klass->source_file_name() == NULL) {
1097 source_file_name = NULL;
1098 } else {
1099 source_file_name = klass->source_file_name()->as_C_string();
1100 buf_len += (int)strlen(source_file_name);
1101 }
1102 char* method_name = method->name()->as_C_string();
1103 buf_len += (int)strlen(method_name);
1104
1105 // Allocate temporary buffer with extra space for formatting and line number
1106 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
1107
1108 // Print stack trace line in buffer
1109 sprintf(buf, "\tat %s.%s", klass_name, method_name);
1110 if (method->is_native()) {
1111 strcat(buf, "(Native Method)");
1112 } else {
1113 int line_number = method->line_number_from_bci(bci);
1114 if (source_file_name != NULL && (line_number != -1)) {
1115 // Sourcename and linenumber
1116 sprintf(buf + (int)strlen(buf), "(%s:%d)", source_file_name, line_number);
1117 } else if (source_file_name != NULL) {
1118 // Just sourcename
1119 sprintf(buf + (int)strlen(buf), "(%s)", source_file_name);
1120 } else {
1121 // Neither soucename and linenumber
1122 sprintf(buf + (int)strlen(buf), "(Unknown Source)");
1123 }
1124 nmethod* nm = method->code();
1125 if (WizardMode && nm != NULL) {
1126 sprintf(buf + (int)strlen(buf), "(nmethod " PTR_FORMAT ")", (intptr_t)nm);
1127 }
1128 }
1129
1130 return buf;
1131 }
1132
1133
1134 void java_lang_Throwable::print_stack_element(Handle stream, methodOop method, int bci) {
1135 ResourceMark rm;
1136 char* buf = print_stack_element_to_buffer(method, bci);
1137 print_to_stream(stream, buf);
1138 }
1139
1140 void java_lang_Throwable::print_stack_element(outputStream *st, methodOop method, int bci) {
1141 ResourceMark rm;
1142 char* buf = print_stack_element_to_buffer(method, bci);
1143 st->print_cr("%s", buf);
1144 }
1145
1146 void java_lang_Throwable::print_to_stream(Handle stream, const char* str) {
1147 if (stream.is_null()) {
1148 tty->print_cr("%s", str);
1149 } else {
1150 EXCEPTION_MARK;
1151 JavaValue result(T_VOID);
1152 Handle arg (THREAD, oopFactory::new_charArray(str, THREAD));
1153 if (!HAS_PENDING_EXCEPTION) {
1154 JavaCalls::call_virtual(&result,
1155 stream,
1156 KlassHandle(THREAD, stream->klass()),
1157 vmSymbols::println_name(),
1158 vmSymbols::char_array_void_signature(),
1159 arg,
1160 THREAD);
1161 }
1162 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
1163 if (HAS_PENDING_EXCEPTION) CLEAR_PENDING_EXCEPTION;
1164 }
1165
1166 }
1167
1168
1169 const char* java_lang_Throwable::no_stack_trace_message() {
1170 return "\t<<no stack trace available>>";
1171 }
1172
1173
1174 // Currently used only for exceptions occurring during startup
1175 void java_lang_Throwable::print_stack_trace(oop throwable, outputStream* st) {
1176 Thread *THREAD = Thread::current();
1177 Handle h_throwable(THREAD, throwable);
1178 while (h_throwable.not_null()) {
1179 objArrayHandle result (THREAD, objArrayOop(backtrace(h_throwable())));
1180 if (result.is_null()) {
1181 st->print_cr(no_stack_trace_message());
1182 return;
1183 }
1184
1185 while (result.not_null()) {
1186 objArrayHandle methods (THREAD,
1187 objArrayOop(result->obj_at(trace_methods_offset)));
1188 typeArrayHandle bcis (THREAD,
1189 typeArrayOop(result->obj_at(trace_bcis_offset)));
1190
1191 if (methods.is_null() || bcis.is_null()) {
1192 st->print_cr(no_stack_trace_message());
1193 return;
1194 }
1195
1196 int length = methods()->length();
1197 for (int index = 0; index < length; index++) {
1198 methodOop method = methodOop(methods()->obj_at(index));
1199 if (method == NULL) goto handle_cause;
1200 int bci = bcis->ushort_at(index);
1201 print_stack_element(st, method, bci);
1202 }
1203 result = objArrayHandle(THREAD, objArrayOop(result->obj_at(trace_next_offset)));
1204 }
1205 handle_cause:
1206 {
1207 EXCEPTION_MARK;
1208 JavaValue result(T_OBJECT);
1209 JavaCalls::call_virtual(&result,
1210 h_throwable,
1211 KlassHandle(THREAD, h_throwable->klass()),
1212 vmSymbols::getCause_name(),
1213 vmSymbols::void_throwable_signature(),
1214 THREAD);
1215 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
1216 if (HAS_PENDING_EXCEPTION) {
1217 CLEAR_PENDING_EXCEPTION;
1218 h_throwable = Handle();
1219 } else {
1220 h_throwable = Handle(THREAD, (oop) result.get_jobject());
1221 if (h_throwable.not_null()) {
1222 st->print("Caused by: ");
1223 print(h_throwable, st);
1224 st->cr();
1225 }
1226 }
1227 }
1228 }
1229 }
1230
1231
1232 void java_lang_Throwable::print_stack_trace(oop throwable, oop print_stream) {
1233 // Note: this is no longer used in Merlin, but we support it for compatibility.
1234 Thread *thread = Thread::current();
1235 Handle stream(thread, print_stream);
1236 objArrayHandle result (thread, objArrayOop(backtrace(throwable)));
1237 if (result.is_null()) {
1238 print_to_stream(stream, no_stack_trace_message());
1239 return;
1240 }
1241
1242 while (result.not_null()) {
1243 objArrayHandle methods (thread,
1244 objArrayOop(result->obj_at(trace_methods_offset)));
1245 typeArrayHandle bcis (thread,
1246 typeArrayOop(result->obj_at(trace_bcis_offset)));
1247
1248 if (methods.is_null() || bcis.is_null()) {
1249 print_to_stream(stream, no_stack_trace_message());
1250 return;
1251 }
1252
1253 int length = methods()->length();
1254 for (int index = 0; index < length; index++) {
1255 methodOop method = methodOop(methods()->obj_at(index));
1256 if (method == NULL) return;
1257 int bci = bcis->ushort_at(index);
1258 print_stack_element(stream, method, bci);
1259 }
1260 result = objArrayHandle(thread, objArrayOop(result->obj_at(trace_next_offset)));
1261 }
1262 }
1263
1264 // This class provides a simple wrapper over the internal structure of
1265 // exception backtrace to insulate users of the backtrace from needing
1266 // to know what it looks like.
1267 class BacktraceBuilder: public StackObj {
1268 private:
1269 Handle _backtrace;
1270 objArrayOop _head;
1271 objArrayOop _methods;
1272 typeArrayOop _bcis;
1273 int _index;
1274 bool _dirty;
1275 No_Safepoint_Verifier _nsv;
1276
1277 public:
1278
1279 enum {
1280 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
1281 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
1282 trace_next_offset = java_lang_Throwable::trace_next_offset,
1283 trace_size = java_lang_Throwable::trace_size,
1284 trace_chunk_size = java_lang_Throwable::trace_chunk_size
1285 };
1286
1287 // constructor for new backtrace
1288 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _dirty(false) {
1289 expand(CHECK);
1290 _backtrace = _head;
1291 _index = 0;
1292 }
1293
1294 void flush() {
1295 // The following appears to have been an optimization to save from
1296 // doing a barrier for each individual store into the _methods array,
1297 // but rather to do it for the entire array after the series of writes.
1298 // That optimization seems to have been lost when compressed oops was
1299 // implemented. However, the extra card-marks below was left in place,
1300 // but is now redundant because the individual stores into the
1301 // _methods array already execute the barrier code. CR 6918185 has
1302 // been filed so the original code may be restored by deferring the
1303 // barriers until after the entire sequence of stores, thus re-enabling
1304 // the intent of the original optimization. In the meantime the redundant
1305 // card mark below is now disabled.
1306 if (_dirty && _methods != NULL) {
1307 #if 0
1308 BarrierSet* bs = Universe::heap()->barrier_set();
1309 assert(bs->has_write_ref_array_opt(), "Barrier set must have ref array opt");
1310 bs->write_ref_array((HeapWord*)_methods->base(), _methods->length());
1311 #endif
1312 _dirty = false;
1313 }
1314 }
1315
1316 void expand(TRAPS) {
1317 flush();
1318
1319 objArrayHandle old_head(THREAD, _head);
1320 Pause_No_Safepoint_Verifier pnsv(&_nsv);
1321
1322 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
1323 objArrayHandle new_head(THREAD, head);
1324
1325 objArrayOop methods = oopFactory::new_objectArray(trace_chunk_size, CHECK);
1326 objArrayHandle new_methods(THREAD, methods);
1327
1328 typeArrayOop bcis = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1329 typeArrayHandle new_bcis(THREAD, bcis);
1330
1331 if (!old_head.is_null()) {
1332 old_head->obj_at_put(trace_next_offset, new_head());
1333 }
1334 new_head->obj_at_put(trace_methods_offset, new_methods());
1335 new_head->obj_at_put(trace_bcis_offset, new_bcis());
1336
1337 _head = new_head();
1338 _methods = new_methods();
1339 _bcis = new_bcis();
1340 _index = 0;
1341 }
1342
1343 oop backtrace() {
1344 flush();
1345 return _backtrace();
1346 }
1347
1348 inline void push(methodOop method, short bci, TRAPS) {
1349 if (_index >= trace_chunk_size) {
1350 methodHandle mhandle(THREAD, method);
1351 expand(CHECK);
1352 method = mhandle();
1353 }
1354
1355 _methods->obj_at_put(_index, method);
1356 _bcis->ushort_at_put(_index, bci);
1357 _index++;
1358 _dirty = true;
1359 }
1360
1361 methodOop current_method() {
1362 assert(_index >= 0 && _index < trace_chunk_size, "out of range");
1363 return methodOop(_methods->obj_at(_index));
1364 }
1365
1366 jushort current_bci() {
1367 assert(_index >= 0 && _index < trace_chunk_size, "out of range");
1368 return _bcis->ushort_at(_index);
1369 }
1370 };
1371
1372
1373 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, TRAPS) {
1374 if (!StackTraceInThrowable) return;
1375 ResourceMark rm(THREAD);
1376
1377 // Start out by clearing the backtrace for this object, in case the VM
1378 // runs out of memory while allocating the stack trace
1379 set_backtrace(throwable(), NULL);
1380 if (JDK_Version::is_gte_jdk14x_version()) {
1381 // New since 1.4, clear lazily constructed Java level stacktrace if
1382 // refilling occurs
1383 clear_stacktrace(throwable());
1384 }
1385
1386 int max_depth = MaxJavaStackTraceDepth;
1387 JavaThread* thread = (JavaThread*)THREAD;
1388 BacktraceBuilder bt(CHECK);
1389
1390 // Instead of using vframe directly, this version of fill_in_stack_trace
1391 // basically handles everything by hand. This significantly improved the
1392 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
1393 // See bug 6333838 for more details.
1394 // The "ASSERT" here is to verify this method generates the exactly same stack
1395 // trace as utilizing vframe.
1396 #ifdef ASSERT
1397 vframeStream st(thread);
1398 methodHandle st_method(THREAD, st.method());
1399 #endif
1400 int total_count = 0;
1401 RegisterMap map(thread, false);
1402 int decode_offset = 0;
1403 nmethod* nm = NULL;
1404 bool skip_fillInStackTrace_check = false;
1405 bool skip_throwableInit_check = false;
1406
1407 for (frame fr = thread->last_frame(); max_depth != total_count;) {
1408 methodOop method = NULL;
1409 int bci = 0;
1410
1411 // Compiled java method case.
1412 if (decode_offset != 0) {
1413 DebugInfoReadStream stream(nm, decode_offset);
1414 decode_offset = stream.read_int();
1415 method = (methodOop)nm->oop_at(stream.read_int());
1416 bci = stream.read_bci();
1417 } else {
1418 if (fr.is_first_frame()) break;
1419 address pc = fr.pc();
1420 if (fr.is_interpreted_frame()) {
1421 intptr_t bcx = fr.interpreter_frame_bcx();
1422 method = fr.interpreter_frame_method();
1423 bci = fr.is_bci(bcx) ? bcx : method->bci_from((address)bcx);
1424 fr = fr.sender(&map);
1425 } else {
1426 CodeBlob* cb = fr.cb();
1427 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
1428 // but non nmethod
1429 fr = fr.sender(&map);
1430 if (cb == NULL || !cb->is_nmethod()) {
1431 continue;
1432 }
1433 nm = (nmethod*)cb;
1434 if (nm->method()->is_native()) {
1435 method = nm->method();
1436 bci = 0;
1437 } else {
1438 PcDesc* pd = nm->pc_desc_at(pc);
1439 decode_offset = pd->scope_decode_offset();
1440 // if decode_offset is not equal to 0, it will execute the
1441 // "compiled java method case" at the beginning of the loop.
1442 continue;
1443 }
1444 }
1445 }
1446 #ifdef ASSERT
1447 assert(st_method() == method && st.bci() == bci,
1448 "Wrong stack trace");
1449 st.next();
1450 // vframeStream::method isn't GC-safe so store off a copy
1451 // of the methodOop in case we GC.
1452 if (!st.at_end()) {
1453 st_method = st.method();
1454 }
1455 #endif
1456 if (!skip_fillInStackTrace_check) {
1457 // check "fillInStackTrace" only once, so we negate the flag
1458 // after the first time check.
1459 skip_fillInStackTrace_check = true;
1460 if (method->name() == vmSymbols::fillInStackTrace_name()) {
1461 continue;
1462 }
1463 }
1464 // skip <init> methods of the exceptions klass. If there is <init> methods
1465 // that belongs to a superclass of the exception we are going to skipping
1466 // them in stack trace. This is simlar to classic VM.
1467 if (!skip_throwableInit_check) {
1468 if (method->name() == vmSymbols::object_initializer_name() &&
1469 throwable->is_a(method->method_holder())) {
1470 continue;
1471 } else {
1472 // if no "Throwable.init()" method found, we stop checking it next time.
1473 skip_throwableInit_check = true;
1474 }
1475 }
1476 bt.push(method, bci, CHECK);
1477 total_count++;
1478 }
1479
1480 // Put completed stack trace into throwable object
1481 set_backtrace(throwable(), bt.backtrace());
1482 }
1483
1484 void java_lang_Throwable::fill_in_stack_trace(Handle throwable) {
1485 // No-op if stack trace is disabled
1486 if (!StackTraceInThrowable) {
1487 return;
1488 }
1489
1490 // Disable stack traces for some preallocated out of memory errors
1491 if (!Universe::should_fill_in_stack_trace(throwable)) {
1492 return;
1493 }
1494
1495 PRESERVE_EXCEPTION_MARK;
1496
1497 JavaThread* thread = JavaThread::active();
1498 fill_in_stack_trace(throwable, thread);
1499 // ignore exceptions thrown during stack trace filling
1500 CLEAR_PENDING_EXCEPTION;
1501 }
1502
1503 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
1504 // Allocate stack trace - backtrace is created but not filled in
1505
1506 // No-op if stack trace is disabled
1507 if (!StackTraceInThrowable) return;
1508
1509 objArrayOop h_oop = oopFactory::new_objectArray(trace_size, CHECK);
1510 objArrayHandle backtrace (THREAD, h_oop);
1511 objArrayOop m_oop = oopFactory::new_objectArray(trace_chunk_size, CHECK);
1512 objArrayHandle methods (THREAD, m_oop);
1513 typeArrayOop b = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1514 typeArrayHandle bcis(THREAD, b);
1515
1516 // backtrace has space for one chunk (next is NULL)
1517 backtrace->obj_at_put(trace_methods_offset, methods());
1518 backtrace->obj_at_put(trace_bcis_offset, bcis());
1519 set_backtrace(throwable(), backtrace());
1520 }
1521
1522
1523 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
1524 // Fill in stack trace into preallocated backtrace (no GC)
1525
1526 // No-op if stack trace is disabled
1527 if (!StackTraceInThrowable) return;
1528
1529 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
1530
1531 oop backtrace = java_lang_Throwable::backtrace(throwable());
1532 assert(backtrace != NULL, "backtrace not preallocated");
1533
1534 oop m = objArrayOop(backtrace)->obj_at(trace_methods_offset);
1535 objArrayOop methods = objArrayOop(m);
1536 assert(methods != NULL && methods->length() > 0, "method array not preallocated");
1537
1538 oop b = objArrayOop(backtrace)->obj_at(trace_bcis_offset);
1539 typeArrayOop bcis = typeArrayOop(b);
1540 assert(bcis != NULL, "bci array not preallocated");
1541
1542 assert(methods->length() == bcis->length(), "method and bci arrays should match");
1543
1544 JavaThread* thread = JavaThread::current();
1545 ResourceMark rm(thread);
1546 vframeStream st(thread);
1547
1548 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
1549 // methods as preallocated errors aren't created by "java" code.
1550
1551 // fill in as much stack trace as possible
1552 int max_chunks = MIN2(methods->length(), (int)MaxJavaStackTraceDepth);
1553 int chunk_count = 0;
1554
1555 for (;!st.at_end(); st.next()) {
1556 // add element
1557 bcis->ushort_at_put(chunk_count, st.bci());
1558 methods->obj_at_put(chunk_count, st.method());
1559
1560 chunk_count++;
1561
1562 // Bail-out for deep stacks
1563 if (chunk_count >= max_chunks) break;
1564 }
1565 }
1566
1567
1568 int java_lang_Throwable::get_stack_trace_depth(oop throwable, TRAPS) {
1569 if (throwable == NULL) {
1570 THROW_0(vmSymbols::java_lang_NullPointerException());
1571 }
1572 objArrayOop chunk = objArrayOop(backtrace(throwable));
1573 int depth = 0;
1574 if (chunk != NULL) {
1575 // Iterate over chunks and count full ones
1576 while (true) {
1577 objArrayOop next = objArrayOop(chunk->obj_at(trace_next_offset));
1578 if (next == NULL) break;
1579 depth += trace_chunk_size;
1580 chunk = next;
1581 }
1582 assert(chunk != NULL && chunk->obj_at(trace_next_offset) == NULL, "sanity check");
1583 // Count element in remaining partial chunk
1584 objArrayOop methods = objArrayOop(chunk->obj_at(trace_methods_offset));
1585 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1586 assert(methods != NULL && bcis != NULL, "sanity check");
1587 for (int i = 0; i < methods->length(); i++) {
1588 if (methods->obj_at(i) == NULL) break;
1589 depth++;
1590 }
1591 }
1592 return depth;
1593 }
1594
1595
1596 oop java_lang_Throwable::get_stack_trace_element(oop throwable, int index, TRAPS) {
1597 if (throwable == NULL) {
1598 THROW_0(vmSymbols::java_lang_NullPointerException());
1599 }
1600 if (index < 0) {
1601 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1602 }
1603 // Compute how many chunks to skip and index into actual chunk
1604 objArrayOop chunk = objArrayOop(backtrace(throwable));
1605 int skip_chunks = index / trace_chunk_size;
1606 int chunk_index = index % trace_chunk_size;
1607 while (chunk != NULL && skip_chunks > 0) {
1608 chunk = objArrayOop(chunk->obj_at(trace_next_offset));
1609 skip_chunks--;
1610 }
1611 if (chunk == NULL) {
1612 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1613 }
1614 // Get method,bci from chunk
1615 objArrayOop methods = objArrayOop(chunk->obj_at(trace_methods_offset));
1616 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1617 assert(methods != NULL && bcis != NULL, "sanity check");
1618 methodHandle method(THREAD, methodOop(methods->obj_at(chunk_index)));
1619 int bci = bcis->ushort_at(chunk_index);
1620 // Chunk can be partial full
1621 if (method.is_null()) {
1622 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1623 }
1624
1625 oop element = java_lang_StackTraceElement::create(method, bci, CHECK_0);
1626 return element;
1627 }
1628
1629 oop java_lang_StackTraceElement::create(methodHandle method, int bci, TRAPS) {
1630 // SystemDictionary::stackTraceElement_klass() will be null for pre-1.4 JDKs
1631 assert(JDK_Version::is_gte_jdk14x_version(), "should only be called in >= 1.4");
1632
1633 // Allocate java.lang.StackTraceElement instance
1634 klassOop k = SystemDictionary::StackTraceElement_klass();
1635 assert(k != NULL, "must be loaded in 1.4+");
1636 instanceKlassHandle ik (THREAD, k);
1637 if (ik->should_be_initialized()) {
1638 ik->initialize(CHECK_0);
1639 }
1640
1641 Handle element = ik->allocate_instance_handle(CHECK_0);
1642 // Fill in class name
1643 ResourceMark rm(THREAD);
1644 const char* str = instanceKlass::cast(method->method_holder())->external_name();
1645 oop classname = StringTable::intern((char*) str, CHECK_0);
1646 java_lang_StackTraceElement::set_declaringClass(element(), classname);
1647 // Fill in method name
1648 oop methodname = StringTable::intern(method->name(), CHECK_0);
1649 java_lang_StackTraceElement::set_methodName(element(), methodname);
1650 // Fill in source file name
1651 Symbol* source = instanceKlass::cast(method->method_holder())->source_file_name();
1652 oop filename = StringTable::intern(source, CHECK_0);
1653 java_lang_StackTraceElement::set_fileName(element(), filename);
1654 // File in source line number
1655 int line_number;
1656 if (method->is_native()) {
1657 // Negative value different from -1 below, enabling Java code in
1658 // class java.lang.StackTraceElement to distinguish "native" from
1659 // "no LineNumberTable".
1660 line_number = -2;
1661 } else {
1662 // Returns -1 if no LineNumberTable, and otherwise actual line number
1663 line_number = method->line_number_from_bci(bci);
1664 }
1665 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
1666
1667 return element();
1668 }
1669
1670
1671 void java_lang_reflect_AccessibleObject::compute_offsets() {
1672 klassOop k = SystemDictionary::reflect_AccessibleObject_klass();
1673 compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature());
1674 }
1675
1676 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
1677 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1678 return (jboolean) reflect->bool_field(override_offset);
1679 }
1680
1681 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
1682 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1683 reflect->bool_field_put(override_offset, (int) value);
1684 }
1685
1686 void java_lang_reflect_Method::compute_offsets() {
1687 klassOop k = SystemDictionary::reflect_Method_klass();
1688 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
1689 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1690 compute_offset(returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature());
1691 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
1692 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
1693 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
1694 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
1695 // The generic signature and annotations fields are only present in 1.5
1696 signature_offset = -1;
1697 annotations_offset = -1;
1698 parameter_annotations_offset = -1;
1699 annotation_default_offset = -1;
1700 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
1701 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
1702 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
1703 compute_optional_offset(annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature());
1704 }
1705
1706 Handle java_lang_reflect_Method::create(TRAPS) {
1707 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1708 klassOop klass = SystemDictionary::reflect_Method_klass();
1709 // This class is eagerly initialized during VM initialization, since we keep a refence
1710 // to one of the methods
1711 assert(instanceKlass::cast(klass)->is_initialized(), "must be initialized");
1712 return instanceKlass::cast(klass)->allocate_instance_handle(CHECK_NH);
1713 }
1714
1715 oop java_lang_reflect_Method::clazz(oop reflect) {
1716 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1717 return reflect->obj_field(clazz_offset);
1718 }
1719
1720 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
1721 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1722 reflect->obj_field_put(clazz_offset, value);
1723 }
1724
1725 int java_lang_reflect_Method::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_Method::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 oop java_lang_reflect_Method::name(oop method) {
1736 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1737 return method->obj_field(name_offset);
1738 }
1739
1740 void java_lang_reflect_Method::set_name(oop method, oop value) {
1741 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1742 method->obj_field_put(name_offset, value);
1743 }
1744
1745 oop java_lang_reflect_Method::return_type(oop method) {
1746 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1747 return method->obj_field(returnType_offset);
1748 }
1749
1750 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
1751 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1752 method->obj_field_put(returnType_offset, value);
1753 }
1754
1755 oop java_lang_reflect_Method::parameter_types(oop method) {
1756 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1757 return method->obj_field(parameterTypes_offset);
1758 }
1759
1760 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
1761 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1762 method->obj_field_put(parameterTypes_offset, value);
1763 }
1764
1765 oop java_lang_reflect_Method::exception_types(oop method) {
1766 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1767 return method->obj_field(exceptionTypes_offset);
1768 }
1769
1770 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
1771 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1772 method->obj_field_put(exceptionTypes_offset, value);
1773 }
1774
1775 int java_lang_reflect_Method::modifiers(oop method) {
1776 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1777 return method->int_field(modifiers_offset);
1778 }
1779
1780 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
1781 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1782 method->int_field_put(modifiers_offset, value);
1783 }
1784
1785 bool java_lang_reflect_Method::has_signature_field() {
1786 return (signature_offset >= 0);
1787 }
1788
1789 oop java_lang_reflect_Method::signature(oop method) {
1790 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1791 assert(has_signature_field(), "signature field must be present");
1792 return method->obj_field(signature_offset);
1793 }
1794
1795 void java_lang_reflect_Method::set_signature(oop method, oop value) {
1796 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1797 assert(has_signature_field(), "signature field must be present");
1798 method->obj_field_put(signature_offset, value);
1799 }
1800
1801 bool java_lang_reflect_Method::has_annotations_field() {
1802 return (annotations_offset >= 0);
1803 }
1804
1805 oop java_lang_reflect_Method::annotations(oop method) {
1806 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1807 assert(has_annotations_field(), "annotations field must be present");
1808 return method->obj_field(annotations_offset);
1809 }
1810
1811 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
1812 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1813 assert(has_annotations_field(), "annotations field must be present");
1814 method->obj_field_put(annotations_offset, value);
1815 }
1816
1817 bool java_lang_reflect_Method::has_parameter_annotations_field() {
1818 return (parameter_annotations_offset >= 0);
1819 }
1820
1821 oop java_lang_reflect_Method::parameter_annotations(oop method) {
1822 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1823 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
1824 return method->obj_field(parameter_annotations_offset);
1825 }
1826
1827 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
1828 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1829 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
1830 method->obj_field_put(parameter_annotations_offset, value);
1831 }
1832
1833 bool java_lang_reflect_Method::has_annotation_default_field() {
1834 return (annotation_default_offset >= 0);
1835 }
1836
1837 oop java_lang_reflect_Method::annotation_default(oop method) {
1838 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1839 assert(has_annotation_default_field(), "annotation default field must be present");
1840 return method->obj_field(annotation_default_offset);
1841 }
1842
1843 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
1844 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1845 assert(has_annotation_default_field(), "annotation default field must be present");
1846 method->obj_field_put(annotation_default_offset, value);
1847 }
1848
1849 void java_lang_reflect_Constructor::compute_offsets() {
1850 klassOop k = SystemDictionary::reflect_Constructor_klass();
1851 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
1852 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
1853 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
1854 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
1855 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
1856 // The generic signature and annotations fields are only present in 1.5
1857 signature_offset = -1;
1858 annotations_offset = -1;
1859 parameter_annotations_offset = -1;
1860 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
1861 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
1862 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
1863 }
1864
1865 Handle java_lang_reflect_Constructor::create(TRAPS) {
1866 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1867 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
1868 klassOop k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
1869 instanceKlassHandle klass (THREAD, k);
1870 // Ensure it is initialized
1871 klass->initialize(CHECK_NH);
1872 return klass->allocate_instance_handle(CHECK_NH);
1873 }
1874
1875 oop java_lang_reflect_Constructor::clazz(oop reflect) {
1876 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1877 return reflect->obj_field(clazz_offset);
1878 }
1879
1880 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
1881 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1882 reflect->obj_field_put(clazz_offset, value);
1883 }
1884
1885 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
1886 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1887 return constructor->obj_field(parameterTypes_offset);
1888 }
1889
1890 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
1891 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1892 constructor->obj_field_put(parameterTypes_offset, value);
1893 }
1894
1895 oop java_lang_reflect_Constructor::exception_types(oop constructor) {
1896 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1897 return constructor->obj_field(exceptionTypes_offset);
1898 }
1899
1900 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
1901 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1902 constructor->obj_field_put(exceptionTypes_offset, value);
1903 }
1904
1905 int java_lang_reflect_Constructor::slot(oop reflect) {
1906 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1907 return reflect->int_field(slot_offset);
1908 }
1909
1910 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
1911 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1912 reflect->int_field_put(slot_offset, value);
1913 }
1914
1915 int java_lang_reflect_Constructor::modifiers(oop constructor) {
1916 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1917 return constructor->int_field(modifiers_offset);
1918 }
1919
1920 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
1921 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1922 constructor->int_field_put(modifiers_offset, value);
1923 }
1924
1925 bool java_lang_reflect_Constructor::has_signature_field() {
1926 return (signature_offset >= 0);
1927 }
1928
1929 oop java_lang_reflect_Constructor::signature(oop constructor) {
1930 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1931 assert(has_signature_field(), "signature field must be present");
1932 return constructor->obj_field(signature_offset);
1933 }
1934
1935 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
1936 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1937 assert(has_signature_field(), "signature field must be present");
1938 constructor->obj_field_put(signature_offset, value);
1939 }
1940
1941 bool java_lang_reflect_Constructor::has_annotations_field() {
1942 return (annotations_offset >= 0);
1943 }
1944
1945 oop java_lang_reflect_Constructor::annotations(oop constructor) {
1946 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1947 assert(has_annotations_field(), "annotations field must be present");
1948 return constructor->obj_field(annotations_offset);
1949 }
1950
1951 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
1952 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1953 assert(has_annotations_field(), "annotations field must be present");
1954 constructor->obj_field_put(annotations_offset, value);
1955 }
1956
1957 bool java_lang_reflect_Constructor::has_parameter_annotations_field() {
1958 return (parameter_annotations_offset >= 0);
1959 }
1960
1961 oop java_lang_reflect_Constructor::parameter_annotations(oop method) {
1962 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1963 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
1964 return method->obj_field(parameter_annotations_offset);
1965 }
1966
1967 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
1968 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1969 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
1970 method->obj_field_put(parameter_annotations_offset, value);
1971 }
1972
1973 void java_lang_reflect_Field::compute_offsets() {
1974 klassOop k = SystemDictionary::reflect_Field_klass();
1975 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
1976 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1977 compute_offset(type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature());
1978 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
1979 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
1980 // The generic signature and annotations fields are only present in 1.5
1981 signature_offset = -1;
1982 annotations_offset = -1;
1983 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
1984 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
1985 }
1986
1987 Handle java_lang_reflect_Field::create(TRAPS) {
1988 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1989 Symbol* name = vmSymbols::java_lang_reflect_Field();
1990 klassOop k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
1991 instanceKlassHandle klass (THREAD, k);
1992 // Ensure it is initialized
1993 klass->initialize(CHECK_NH);
1994 return klass->allocate_instance_handle(CHECK_NH);
1995 }
1996
1997 oop java_lang_reflect_Field::clazz(oop reflect) {
1998 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1999 return reflect->obj_field(clazz_offset);
2000 }
2001
2002 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
2003 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2004 reflect->obj_field_put(clazz_offset, value);
2005 }
2006
2007 oop java_lang_reflect_Field::name(oop field) {
2008 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2009 return field->obj_field(name_offset);
2010 }
2011
2012 void java_lang_reflect_Field::set_name(oop field, oop value) {
2013 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2014 field->obj_field_put(name_offset, value);
2015 }
2016
2017 oop java_lang_reflect_Field::type(oop field) {
2018 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2019 return field->obj_field(type_offset);
2020 }
2021
2022 void java_lang_reflect_Field::set_type(oop field, oop value) {
2023 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2024 field->obj_field_put(type_offset, value);
2025 }
2026
2027 int java_lang_reflect_Field::slot(oop reflect) {
2028 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2029 return reflect->int_field(slot_offset);
2030 }
2031
2032 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
2033 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2034 reflect->int_field_put(slot_offset, value);
2035 }
2036
2037 int java_lang_reflect_Field::modifiers(oop field) {
2038 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2039 return field->int_field(modifiers_offset);
2040 }
2041
2042 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
2043 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2044 field->int_field_put(modifiers_offset, value);
2045 }
2046
2047 bool java_lang_reflect_Field::has_signature_field() {
2048 return (signature_offset >= 0);
2049 }
2050
2051 oop java_lang_reflect_Field::signature(oop field) {
2052 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2053 assert(has_signature_field(), "signature field must be present");
2054 return field->obj_field(signature_offset);
2055 }
2056
2057 void java_lang_reflect_Field::set_signature(oop field, oop value) {
2058 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2059 assert(has_signature_field(), "signature field must be present");
2060 field->obj_field_put(signature_offset, value);
2061 }
2062
2063 bool java_lang_reflect_Field::has_annotations_field() {
2064 return (annotations_offset >= 0);
2065 }
2066
2067 oop java_lang_reflect_Field::annotations(oop field) {
2068 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2069 assert(has_annotations_field(), "annotations field must be present");
2070 return field->obj_field(annotations_offset);
2071 }
2072
2073 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
2074 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2075 assert(has_annotations_field(), "annotations field must be present");
2076 field->obj_field_put(annotations_offset, value);
2077 }
2078
2079
2080 void sun_reflect_ConstantPool::compute_offsets() {
2081 klassOop k = SystemDictionary::reflect_ConstantPool_klass();
2082 // This null test can be removed post beta
2083 if (k != NULL) {
2084 compute_offset(_cp_oop_offset, k, vmSymbols::constantPoolOop_name(), vmSymbols::object_signature());
2085 }
2086 }
2087
2088
2089 Handle sun_reflect_ConstantPool::create(TRAPS) {
2090 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2091 klassOop k = SystemDictionary::reflect_ConstantPool_klass();
2092 instanceKlassHandle klass (THREAD, k);
2093 // Ensure it is initialized
2094 klass->initialize(CHECK_NH);
2095 return klass->allocate_instance_handle(CHECK_NH);
2096 }
2097
2098
2099 oop sun_reflect_ConstantPool::cp_oop(oop reflect) {
2100 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2101 return reflect->obj_field(_cp_oop_offset);
2102 }
2103
2104
2105 void sun_reflect_ConstantPool::set_cp_oop(oop reflect, oop value) {
2106 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2107 reflect->obj_field_put(_cp_oop_offset, value);
2108 }
2109
2110 void sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
2111 klassOop k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass();
2112 // This null test can be removed post beta
2113 if (k != NULL) {
2114 compute_offset(_base_offset, k,
2115 vmSymbols::base_name(), vmSymbols::object_signature());
2116 }
2117 }
2118
2119 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
2120 klassOop k = SystemDictionary::box_klass(type);
2121 if (k == NULL) return NULL;
2122 instanceKlassHandle h (THREAD, k);
2123 if (!h->is_initialized()) h->initialize(CHECK_0);
2124 return h->allocate_instance(THREAD);
2125 }
2126
2127
2128 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
2129 oop box = initialize_and_allocate(type, CHECK_0);
2130 if (box == NULL) return NULL;
2131 switch (type) {
2132 case T_BOOLEAN:
2133 box->bool_field_put(value_offset, value->z);
2134 break;
2135 case T_CHAR:
2136 box->char_field_put(value_offset, value->c);
2137 break;
2138 case T_FLOAT:
2139 box->float_field_put(value_offset, value->f);
2140 break;
2141 case T_DOUBLE:
2142 box->double_field_put(long_value_offset, value->d);
2143 break;
2144 case T_BYTE:
2145 box->byte_field_put(value_offset, value->b);
2146 break;
2147 case T_SHORT:
2148 box->short_field_put(value_offset, value->s);
2149 break;
2150 case T_INT:
2151 box->int_field_put(value_offset, value->i);
2152 break;
2153 case T_LONG:
2154 box->long_field_put(long_value_offset, value->j);
2155 break;
2156 default:
2157 return NULL;
2158 }
2159 return box;
2160 }
2161
2162
2163 BasicType java_lang_boxing_object::basic_type(oop box) {
2164 if (box == NULL) return T_ILLEGAL;
2165 BasicType type = SystemDictionary::box_klass_type(box->klass());
2166 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
2167 return T_ILLEGAL;
2168 return type;
2169 }
2170
2171
2172 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
2173 BasicType type = SystemDictionary::box_klass_type(box->klass());
2174 switch (type) {
2175 case T_BOOLEAN:
2176 value->z = box->bool_field(value_offset);
2177 break;
2178 case T_CHAR:
2179 value->c = box->char_field(value_offset);
2180 break;
2181 case T_FLOAT:
2182 value->f = box->float_field(value_offset);
2183 break;
2184 case T_DOUBLE:
2185 value->d = box->double_field(long_value_offset);
2186 break;
2187 case T_BYTE:
2188 value->b = box->byte_field(value_offset);
2189 break;
2190 case T_SHORT:
2191 value->s = box->short_field(value_offset);
2192 break;
2193 case T_INT:
2194 value->i = box->int_field(value_offset);
2195 break;
2196 case T_LONG:
2197 value->j = box->long_field(long_value_offset);
2198 break;
2199 default:
2200 return T_ILLEGAL;
2201 } // end switch
2202 return type;
2203 }
2204
2205
2206 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
2207 BasicType type = SystemDictionary::box_klass_type(box->klass());
2208 switch (type) {
2209 case T_BOOLEAN:
2210 box->bool_field_put(value_offset, value->z);
2211 break;
2212 case T_CHAR:
2213 box->char_field_put(value_offset, value->c);
2214 break;
2215 case T_FLOAT:
2216 box->float_field_put(value_offset, value->f);
2217 break;
2218 case T_DOUBLE:
2219 box->double_field_put(long_value_offset, value->d);
2220 break;
2221 case T_BYTE:
2222 box->byte_field_put(value_offset, value->b);
2223 break;
2224 case T_SHORT:
2225 box->short_field_put(value_offset, value->s);
2226 break;
2227 case T_INT:
2228 box->int_field_put(value_offset, value->i);
2229 break;
2230 case T_LONG:
2231 box->long_field_put(long_value_offset, value->j);
2232 break;
2233 default:
2234 return T_ILLEGAL;
2235 } // end switch
2236 return type;
2237 }
2238
2239
2240 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
2241 switch (type) {
2242 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
2243 case T_CHAR: st->print("%d", value->c); break;
2244 case T_BYTE: st->print("%d", value->b); break;
2245 case T_SHORT: st->print("%d", value->s); break;
2246 case T_INT: st->print("%d", value->i); break;
2247 case T_LONG: st->print(INT64_FORMAT, value->j); break;
2248 case T_FLOAT: st->print("%f", value->f); break;
2249 case T_DOUBLE: st->print("%lf", value->d); break;
2250 default: st->print("type %d?", type); break;
2251 }
2252 }
2253
2254
2255 // Support for java_lang_ref_Reference
2256 oop java_lang_ref_Reference::pending_list_lock() {
2257 instanceKlass* ik = instanceKlass::cast(SystemDictionary::Reference_klass());
2258 address addr = ik->static_field_addr(static_lock_offset);
2259 if (UseCompressedOops) {
2260 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
2261 } else {
2262 return oopDesc::load_decode_heap_oop((oop*)addr);
2263 }
2264 }
2265
2266 HeapWord *java_lang_ref_Reference::pending_list_addr() {
2267 instanceKlass* ik = instanceKlass::cast(SystemDictionary::Reference_klass());
2268 address addr = ik->static_field_addr(static_pending_offset);
2269 // XXX This might not be HeapWord aligned, almost rather be char *.
2270 return (HeapWord*)addr;
2271 }
2272
2273 oop java_lang_ref_Reference::pending_list() {
2274 char *addr = (char *)pending_list_addr();
2275 if (UseCompressedOops) {
2276 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
2277 } else {
2278 return oopDesc::load_decode_heap_oop((oop*)addr);
2279 }
2280 }
2281
2282
2283 // Support for java_lang_ref_SoftReference
2284
2285 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
2286 return ref->long_field(timestamp_offset);
2287 }
2288
2289 jlong java_lang_ref_SoftReference::clock() {
2290 instanceKlass* ik = instanceKlass::cast(SystemDictionary::SoftReference_klass());
2291 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
2292 return *offset;
2293 }
2294
2295 void java_lang_ref_SoftReference::set_clock(jlong value) {
2296 instanceKlass* ik = instanceKlass::cast(SystemDictionary::SoftReference_klass());
2297 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
2298 *offset = value;
2299 }
2300
2301
2302 // Support for java_lang_invoke_MethodHandle
2303
2304 int java_lang_invoke_MethodHandle::_type_offset;
2305 int java_lang_invoke_MethodHandle::_vmtarget_offset;
2306 int java_lang_invoke_MethodHandle::_vmentry_offset;
2307 int java_lang_invoke_MethodHandle::_vmslots_offset;
2308
2309 int java_lang_invoke_MemberName::_clazz_offset;
2310 int java_lang_invoke_MemberName::_name_offset;
2311 int java_lang_invoke_MemberName::_type_offset;
2312 int java_lang_invoke_MemberName::_flags_offset;
2313 int java_lang_invoke_MemberName::_vmtarget_offset;
2314 int java_lang_invoke_MemberName::_vmindex_offset;
2315
2316 int java_lang_invoke_DirectMethodHandle::_vmindex_offset;
2317
2318 int java_lang_invoke_BoundMethodHandle::_argument_offset;
2319 int java_lang_invoke_BoundMethodHandle::_vmargslot_offset;
2320
2321 int java_lang_invoke_AdapterMethodHandle::_conversion_offset;
2322
2323 void java_lang_invoke_MethodHandle::compute_offsets() {
2324 klassOop k = SystemDictionary::MethodHandle_klass();
2325 if (k != NULL && EnableInvokeDynamic) {
2326 bool allow_super = false;
2327 if (AllowTransitionalJSR292) allow_super = true; // temporary, to access java.dyn.MethodHandleImpl
2328 compute_offset(_type_offset, k, vmSymbols::type_name(), vmSymbols::java_lang_invoke_MethodType_signature(), allow_super);
2329 compute_offset(_vmtarget_offset, k, vmSymbols::vmtarget_name(), vmSymbols::object_signature(), allow_super);
2330 compute_offset(_vmentry_offset, k, vmSymbols::vmentry_name(), vmSymbols::machine_word_signature(), allow_super);
2331
2332 // Note: MH.vmslots (if it is present) is a hoisted copy of MH.type.form.vmslots.
2333 // It is optional pending experiments to keep or toss.
2334 compute_optional_offset(_vmslots_offset, k, vmSymbols::vmslots_name(), vmSymbols::int_signature(), allow_super);
2335 }
2336 }
2337
2338 void java_lang_invoke_MemberName::compute_offsets() {
2339 klassOop k = SystemDictionary::MemberName_klass();
2340 if (k != NULL && EnableInvokeDynamic) {
2341 compute_offset(_clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
2342 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2343 compute_offset(_type_offset, k, vmSymbols::type_name(), vmSymbols::object_signature());
2344 compute_offset(_flags_offset, k, vmSymbols::flags_name(), vmSymbols::int_signature());
2345 compute_offset(_vmtarget_offset, k, vmSymbols::vmtarget_name(), vmSymbols::object_signature());
2346 compute_offset(_vmindex_offset, k, vmSymbols::vmindex_name(), vmSymbols::int_signature());
2347 }
2348 }
2349
2350 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
2351 klassOop k = SystemDictionary::DirectMethodHandle_klass();
2352 if (k != NULL && EnableInvokeDynamic) {
2353 compute_offset(_vmindex_offset, k, vmSymbols::vmindex_name(), vmSymbols::int_signature(), true);
2354 }
2355 }
2356
2357 void java_lang_invoke_BoundMethodHandle::compute_offsets() {
2358 klassOop k = SystemDictionary::BoundMethodHandle_klass();
2359 if (k != NULL && EnableInvokeDynamic) {
2360 compute_offset(_vmargslot_offset, k, vmSymbols::vmargslot_name(), vmSymbols::int_signature(), true);
2361 compute_offset(_argument_offset, k, vmSymbols::argument_name(), vmSymbols::object_signature(), true);
2362 }
2363 }
2364
2365 void java_lang_invoke_AdapterMethodHandle::compute_offsets() {
2366 klassOop k = SystemDictionary::AdapterMethodHandle_klass();
2367 if (k != NULL && EnableInvokeDynamic) {
2368 compute_offset(_conversion_offset, k, vmSymbols::conversion_name(), vmSymbols::int_signature(), true);
2369 }
2370 }
2371
2372 oop java_lang_invoke_MethodHandle::type(oop mh) {
2373 return mh->obj_field(_type_offset);
2374 }
2375
2376 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
2377 mh->obj_field_put(_type_offset, mtype);
2378 }
2379
2380 int java_lang_invoke_MethodHandle::vmslots(oop mh) {
2381 int vmslots_offset = _vmslots_offset;
2382 if (vmslots_offset != 0) {
2383 #ifdef ASSERT
2384 int x = mh->int_field(vmslots_offset);
2385 int y = compute_vmslots(mh);
2386 assert(x == y, "correct hoisted value");
2387 #endif
2388 return mh->int_field(vmslots_offset);
2389 } else {
2390 return compute_vmslots(mh);
2391 }
2392 }
2393
2394 // if MH.vmslots exists, hoist into it the value of type.form.vmslots
2395 void java_lang_invoke_MethodHandle::init_vmslots(oop mh) {
2396 int vmslots_offset = _vmslots_offset;
2397 if (vmslots_offset != 0) {
2398 mh->int_field_put(vmslots_offset, compute_vmslots(mh));
2399 }
2400 }
2401
2402 // fetch type.form.vmslots, which is the number of JVM stack slots
2403 // required to carry the arguments of this MH
2404 int java_lang_invoke_MethodHandle::compute_vmslots(oop mh) {
2405 oop mtype = type(mh);
2406 if (mtype == NULL) return 0; // Java code would get NPE
2407 oop form = java_lang_invoke_MethodType::form(mtype);
2408 if (form == NULL) return 0; // Java code would get NPE
2409 return java_lang_invoke_MethodTypeForm::vmslots(form);
2410 }
2411
2412 // fetch the low-level entry point for this mh
2413 MethodHandleEntry* java_lang_invoke_MethodHandle::vmentry(oop mh) {
2414 return (MethodHandleEntry*) mh->address_field(_vmentry_offset);
2415 }
2416
2417 void java_lang_invoke_MethodHandle::set_vmentry(oop mh, MethodHandleEntry* me) {
2418 assert(_vmentry_offset != 0, "must be present");
2419
2420 // This is always the final step that initializes a valid method handle:
2421 mh->release_address_field_put(_vmentry_offset, (address) me);
2422
2423 // There should be enough memory barriers on exit from native methods
2424 // to ensure that the MH is fully initialized to all threads before
2425 // Java code can publish it in global data structures.
2426 // But just in case, we use release_address_field_put.
2427 }
2428
2429 /// MemberName accessors
2430
2431 oop java_lang_invoke_MemberName::clazz(oop mname) {
2432 assert(is_instance(mname), "wrong type");
2433 return mname->obj_field(_clazz_offset);
2434 }
2435
2436 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
2437 assert(is_instance(mname), "wrong type");
2438 mname->obj_field_put(_clazz_offset, clazz);
2439 }
2440
2441 oop java_lang_invoke_MemberName::name(oop mname) {
2442 assert(is_instance(mname), "wrong type");
2443 return mname->obj_field(_name_offset);
2444 }
2445
2446 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
2447 assert(is_instance(mname), "wrong type");
2448 mname->obj_field_put(_name_offset, name);
2449 }
2450
2451 oop java_lang_invoke_MemberName::type(oop mname) {
2452 assert(is_instance(mname), "wrong type");
2453 return mname->obj_field(_type_offset);
2454 }
2455
2456 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
2457 assert(is_instance(mname), "wrong type");
2458 mname->obj_field_put(_type_offset, type);
2459 }
2460
2461 int java_lang_invoke_MemberName::flags(oop mname) {
2462 assert(is_instance(mname), "wrong type");
2463 return mname->int_field(_flags_offset);
2464 }
2465
2466 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
2467 assert(is_instance(mname), "wrong type");
2468 mname->int_field_put(_flags_offset, flags);
2469 }
2470
2471 oop java_lang_invoke_MemberName::vmtarget(oop mname) {
2472 assert(is_instance(mname), "wrong type");
2473 return mname->obj_field(_vmtarget_offset);
2474 }
2475
2476 void java_lang_invoke_MemberName::set_vmtarget(oop mname, oop ref) {
2477 assert(is_instance(mname), "wrong type");
2478 mname->obj_field_put(_vmtarget_offset, ref);
2479 }
2480
2481 int java_lang_invoke_MemberName::vmindex(oop mname) {
2482 assert(is_instance(mname), "wrong type");
2483 return mname->int_field(_vmindex_offset);
2484 }
2485
2486 void java_lang_invoke_MemberName::set_vmindex(oop mname, int index) {
2487 assert(is_instance(mname), "wrong type");
2488 mname->int_field_put(_vmindex_offset, index);
2489 }
2490
2491 oop java_lang_invoke_MethodHandle::vmtarget(oop mh) {
2492 assert(is_instance(mh), "MH only");
2493 return mh->obj_field(_vmtarget_offset);
2494 }
2495
2496 void java_lang_invoke_MethodHandle::set_vmtarget(oop mh, oop ref) {
2497 assert(is_instance(mh), "MH only");
2498 mh->obj_field_put(_vmtarget_offset, ref);
2499 }
2500
2501 int java_lang_invoke_DirectMethodHandle::vmindex(oop mh) {
2502 assert(is_instance(mh), "DMH only");
2503 return mh->int_field(_vmindex_offset);
2504 }
2505
2506 void java_lang_invoke_DirectMethodHandle::set_vmindex(oop mh, int index) {
2507 assert(is_instance(mh), "DMH only");
2508 mh->int_field_put(_vmindex_offset, index);
2509 }
2510
2511 int java_lang_invoke_BoundMethodHandle::vmargslot(oop mh) {
2512 assert(is_instance(mh), "BMH only");
2513 return mh->int_field(_vmargslot_offset);
2514 }
2515
2516 oop java_lang_invoke_BoundMethodHandle::argument(oop mh) {
2517 assert(is_instance(mh), "BMH only");
2518 return mh->obj_field(_argument_offset);
2519 }
2520
2521 int java_lang_invoke_AdapterMethodHandle::conversion(oop mh) {
2522 assert(is_instance(mh), "AMH only");
2523 return mh->int_field(_conversion_offset);
2524 }
2525
2526 void java_lang_invoke_AdapterMethodHandle::set_conversion(oop mh, int conv) {
2527 assert(is_instance(mh), "AMH only");
2528 mh->int_field_put(_conversion_offset, conv);
2529 }
2530
2531
2532 // Support for java_lang_invoke_MethodType
2533
2534 int java_lang_invoke_MethodType::_rtype_offset;
2535 int java_lang_invoke_MethodType::_ptypes_offset;
2536 int java_lang_invoke_MethodType::_form_offset;
2537
2538 void java_lang_invoke_MethodType::compute_offsets() {
2539 klassOop k = SystemDictionary::MethodType_klass();
2540 if (k != NULL) {
2541 compute_offset(_rtype_offset, k, vmSymbols::rtype_name(), vmSymbols::class_signature());
2542 compute_offset(_ptypes_offset, k, vmSymbols::ptypes_name(), vmSymbols::class_array_signature());
2543 compute_offset(_form_offset, k, vmSymbols::form_name(), vmSymbols::java_lang_invoke_MethodTypeForm_signature());
2544 }
2545 }
2546
2547 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
2548 st->print("(");
2549 objArrayOop pts = ptypes(mt);
2550 for (int i = 0, limit = pts->length(); i < limit; i++) {
2551 java_lang_Class::print_signature(pts->obj_at(i), st);
2552 }
2553 st->print(")");
2554 java_lang_Class::print_signature(rtype(mt), st);
2555 }
2556
2557 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) {
2558 ResourceMark rm;
2559 stringStream buffer(128);
2560 print_signature(mt, &buffer);
2561 const char* sigstr = buffer.base();
2562 int siglen = (int) buffer.size();
2563 Symbol *name;
2564 if (!intern_if_not_found) {
2565 name = SymbolTable::probe(sigstr, siglen);
2566 } else {
2567 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
2568 }
2569 return name;
2570 }
2571
2572 oop java_lang_invoke_MethodType::rtype(oop mt) {
2573 assert(is_instance(mt), "must be a MethodType");
2574 return mt->obj_field(_rtype_offset);
2575 }
2576
2577 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
2578 assert(is_instance(mt), "must be a MethodType");
2579 return (objArrayOop) mt->obj_field(_ptypes_offset);
2580 }
2581
2582 oop java_lang_invoke_MethodType::form(oop mt) {
2583 assert(is_instance(mt), "must be a MethodType");
2584 return mt->obj_field(_form_offset);
2585 }
2586
2587 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
2588 return ptypes(mt)->obj_at(idx);
2589 }
2590
2591 int java_lang_invoke_MethodType::ptype_count(oop mt) {
2592 return ptypes(mt)->length();
2593 }
2594
2595
2596
2597 // Support for java_lang_invoke_MethodTypeForm
2598
2599 int java_lang_invoke_MethodTypeForm::_vmslots_offset;
2600 int java_lang_invoke_MethodTypeForm::_erasedType_offset;
2601 int java_lang_invoke_MethodTypeForm::_genericInvoker_offset;
2602
2603 void java_lang_invoke_MethodTypeForm::compute_offsets() {
2604 klassOop k = SystemDictionary::MethodTypeForm_klass();
2605 if (k != NULL) {
2606 compute_optional_offset(_vmslots_offset, k, vmSymbols::vmslots_name(), vmSymbols::int_signature(), true);
2607 compute_optional_offset(_erasedType_offset, k, vmSymbols::erasedType_name(), vmSymbols::java_lang_invoke_MethodType_signature(), true);
2608 compute_optional_offset(_genericInvoker_offset, k, vmSymbols::genericInvoker_name(), vmSymbols::java_lang_invoke_MethodHandle_signature(), true);
2609 if (_genericInvoker_offset == 0) _genericInvoker_offset = -1; // set to explicit "empty" value
2610 }
2611 }
2612
2613 int java_lang_invoke_MethodTypeForm::vmslots(oop mtform) {
2614 assert(mtform->klass() == SystemDictionary::MethodTypeForm_klass(), "MTForm only");
2615 return mtform->int_field(_vmslots_offset);
2616 }
2617
2618 oop java_lang_invoke_MethodTypeForm::erasedType(oop mtform) {
2619 assert(mtform->klass() == SystemDictionary::MethodTypeForm_klass(), "MTForm only");
2620 return mtform->obj_field(_erasedType_offset);
2621 }
2622
2623 oop java_lang_invoke_MethodTypeForm::genericInvoker(oop mtform) {
2624 assert(mtform->klass() == SystemDictionary::MethodTypeForm_klass(), "MTForm only");
2625 return mtform->obj_field(_genericInvoker_offset);
2626 }
2627
2628
2629 // Support for java_lang_invoke_CallSite
2630
2631 int java_lang_invoke_CallSite::_target_offset;
2632
2633 void java_lang_invoke_CallSite::compute_offsets() {
2634 if (!EnableInvokeDynamic) return;
2635 klassOop k = SystemDictionary::CallSite_klass();
2636 if (k != NULL) {
2637 compute_offset(_target_offset, k, vmSymbols::target_name(), vmSymbols::java_lang_invoke_MethodHandle_signature());
2638 }
2639 }
2640
2641 oop java_lang_invoke_CallSite::target(oop site) {
2642 return site->obj_field(_target_offset);
2643 }
2644
2645 void java_lang_invoke_CallSite::set_target(oop site, oop target) {
2646 site->obj_field_put(_target_offset, target);
2647 }
2648
2649
2650 // Support for java_security_AccessControlContext
2651
2652 int java_security_AccessControlContext::_context_offset = 0;
2653 int java_security_AccessControlContext::_privilegedContext_offset = 0;
2654 int java_security_AccessControlContext::_isPrivileged_offset = 0;
2655
2656 void java_security_AccessControlContext::compute_offsets() {
2657 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
2658 fieldDescriptor fd;
2659 instanceKlass* ik = instanceKlass::cast(SystemDictionary::AccessControlContext_klass());
2660
2661 if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) {
2662 fatal("Invalid layout of java.security.AccessControlContext");
2663 }
2664 _context_offset = fd.offset();
2665
2666 if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) {
2667 fatal("Invalid layout of java.security.AccessControlContext");
2668 }
2669 _privilegedContext_offset = fd.offset();
2670
2671 if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) {
2672 fatal("Invalid layout of java.security.AccessControlContext");
2673 }
2674 _isPrivileged_offset = fd.offset();
2675 }
2676
2677
2678 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
2679 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
2680 // Ensure klass is initialized
2681 instanceKlass::cast(SystemDictionary::AccessControlContext_klass())->initialize(CHECK_0);
2682 // Allocate result
2683 oop result = instanceKlass::cast(SystemDictionary::AccessControlContext_klass())->allocate_instance(CHECK_0);
2684 // Fill in values
2685 result->obj_field_put(_context_offset, context());
2686 result->obj_field_put(_privilegedContext_offset, privileged_context());
2687 result->bool_field_put(_isPrivileged_offset, isPrivileged);
2688 return result;
2689 }
2690
2691
2692 // Support for java_lang_ClassLoader
2693
2694 oop java_lang_ClassLoader::parent(oop loader) {
2695 assert(loader->is_oop(), "loader must be oop");
2696 return loader->obj_field(parent_offset);
2697 }
2698
2699
2700 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
2701 // Fix for 4474172; see evaluation for more details
2702 loader = non_reflection_class_loader(loader);
2703
2704 oop cl = SystemDictionary::java_system_loader();
2705 while(cl != NULL) {
2706 if (cl == loader) return true;
2707 cl = parent(cl);
2708 }
2709 return false;
2710 }
2711
2712 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
2713 if (loader != NULL) {
2714 // See whether this is one of the class loaders associated with
2715 // the generated bytecodes for reflection, and if so, "magically"
2716 // delegate to its parent to prevent class loading from occurring
2717 // in places where applications using reflection didn't expect it.
2718 klassOop delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass();
2719 // This might be null in non-1.4 JDKs
2720 if (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)) {
2721 return parent(loader);
2722 }
2723 }
2724 return loader;
2725 }
2726
2727
2728 // Support for java_lang_System
2729 int java_lang_System::in_offset_in_bytes() {
2730 return (instanceMirrorKlass::offset_of_static_fields() + static_in_offset);
2731 }
2732
2733
2734 int java_lang_System::out_offset_in_bytes() {
2735 return (instanceMirrorKlass::offset_of_static_fields() + static_out_offset);
2736 }
2737
2738
2739 int java_lang_System::err_offset_in_bytes() {
2740 return (instanceMirrorKlass::offset_of_static_fields() + static_err_offset);
2741 }
2742
2743
2744
2745 int java_lang_String::value_offset;
2746 int java_lang_String::offset_offset;
2747 int java_lang_String::count_offset;
2748 int java_lang_String::hash_offset;
2749 int java_lang_Class::klass_offset;
2750 int java_lang_Class::array_klass_offset;
2751 int java_lang_Class::resolved_constructor_offset;
2752 int java_lang_Class::number_of_fake_oop_fields;
2753 int java_lang_Class::oop_size_offset;
2754 int java_lang_Class::static_oop_field_count_offset;
2755 int java_lang_Throwable::backtrace_offset;
2756 int java_lang_Throwable::detailMessage_offset;
2757 int java_lang_Throwable::cause_offset;
2758 int java_lang_Throwable::stackTrace_offset;
2759 int java_lang_reflect_AccessibleObject::override_offset;
2760 int java_lang_reflect_Method::clazz_offset;
2761 int java_lang_reflect_Method::name_offset;
2762 int java_lang_reflect_Method::returnType_offset;
2763 int java_lang_reflect_Method::parameterTypes_offset;
2764 int java_lang_reflect_Method::exceptionTypes_offset;
2765 int java_lang_reflect_Method::slot_offset;
2766 int java_lang_reflect_Method::modifiers_offset;
2767 int java_lang_reflect_Method::signature_offset;
2768 int java_lang_reflect_Method::annotations_offset;
2769 int java_lang_reflect_Method::parameter_annotations_offset;
2770 int java_lang_reflect_Method::annotation_default_offset;
2771 int java_lang_reflect_Constructor::clazz_offset;
2772 int java_lang_reflect_Constructor::parameterTypes_offset;
2773 int java_lang_reflect_Constructor::exceptionTypes_offset;
2774 int java_lang_reflect_Constructor::slot_offset;
2775 int java_lang_reflect_Constructor::modifiers_offset;
2776 int java_lang_reflect_Constructor::signature_offset;
2777 int java_lang_reflect_Constructor::annotations_offset;
2778 int java_lang_reflect_Constructor::parameter_annotations_offset;
2779 int java_lang_reflect_Field::clazz_offset;
2780 int java_lang_reflect_Field::name_offset;
2781 int java_lang_reflect_Field::type_offset;
2782 int java_lang_reflect_Field::slot_offset;
2783 int java_lang_reflect_Field::modifiers_offset;
2784 int java_lang_reflect_Field::signature_offset;
2785 int java_lang_reflect_Field::annotations_offset;
2786 int java_lang_boxing_object::value_offset;
2787 int java_lang_boxing_object::long_value_offset;
2788 int java_lang_ref_Reference::referent_offset;
2789 int java_lang_ref_Reference::queue_offset;
2790 int java_lang_ref_Reference::next_offset;
2791 int java_lang_ref_Reference::discovered_offset;
2792 int java_lang_ref_Reference::static_lock_offset;
2793 int java_lang_ref_Reference::static_pending_offset;
2794 int java_lang_ref_Reference::number_of_fake_oop_fields;
2795 int java_lang_ref_SoftReference::timestamp_offset;
2796 int java_lang_ref_SoftReference::static_clock_offset;
2797 int java_lang_ClassLoader::parent_offset;
2798 int java_lang_System::static_in_offset;
2799 int java_lang_System::static_out_offset;
2800 int java_lang_System::static_err_offset;
2801 int java_lang_StackTraceElement::declaringClass_offset;
2802 int java_lang_StackTraceElement::methodName_offset;
2803 int java_lang_StackTraceElement::fileName_offset;
2804 int java_lang_StackTraceElement::lineNumber_offset;
2805 int java_lang_AssertionStatusDirectives::classes_offset;
2806 int java_lang_AssertionStatusDirectives::classEnabled_offset;
2807 int java_lang_AssertionStatusDirectives::packages_offset;
2808 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
2809 int java_lang_AssertionStatusDirectives::deflt_offset;
2810 int java_nio_Buffer::_limit_offset;
2811 int sun_misc_AtomicLongCSImpl::_value_offset;
2812 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0;
2813 int sun_reflect_ConstantPool::_cp_oop_offset;
2814 int sun_reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
2815
2816
2817 // Support for java_lang_StackTraceElement
2818
2819 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
2820 element->obj_field_put(fileName_offset, value);
2821 }
2822
2823 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
2824 element->obj_field_put(declaringClass_offset, value);
2825 }
2826
2827 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
2828 element->obj_field_put(methodName_offset, value);
2829 }
2830
2831 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
2832 element->int_field_put(lineNumber_offset, value);
2833 }
2834
2835
2836 // Support for java Assertions - java_lang_AssertionStatusDirectives.
2837
2838 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
2839 o->obj_field_put(classes_offset, val);
2840 }
2841
2842 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
2843 o->obj_field_put(classEnabled_offset, val);
2844 }
2845
2846 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
2847 o->obj_field_put(packages_offset, val);
2848 }
2849
2850 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
2851 o->obj_field_put(packageEnabled_offset, val);
2852 }
2853
2854 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
2855 o->bool_field_put(deflt_offset, val);
2856 }
2857
2858
2859 // Support for intrinsification of java.nio.Buffer.checkIndex
2860 int java_nio_Buffer::limit_offset() {
2861 return _limit_offset;
2862 }
2863
2864
2865 void java_nio_Buffer::compute_offsets() {
2866 klassOop k = SystemDictionary::java_nio_Buffer_klass();
2867 assert(k != NULL, "must be loaded in 1.4+");
2868 compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature());
2869 }
2870
2871 // Support for intrinsification of sun.misc.AtomicLongCSImpl.attemptUpdate
2872 int sun_misc_AtomicLongCSImpl::value_offset() {
2873 assert(SystemDictionary::sun_misc_AtomicLongCSImpl_klass() != NULL, "can't call this");
2874 return _value_offset;
2875 }
2876
2877
2878 void sun_misc_AtomicLongCSImpl::compute_offsets() {
2879 klassOop k = SystemDictionary::sun_misc_AtomicLongCSImpl_klass();
2880 // If this class is not present, its value field offset won't be referenced.
2881 if (k != NULL) {
2882 compute_offset(_value_offset, k, vmSymbols::value_name(), vmSymbols::long_signature());
2883 }
2884 }
2885
2886 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) {
2887 if (_owner_offset != 0) return;
2888
2889 assert(JDK_Version::is_gte_jdk16x_version(), "Must be JDK 1.6 or later");
2890 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK);
2891 klassOop k = SystemDictionary::abstract_ownable_synchronizer_klass();
2892 compute_offset(_owner_offset, k,
2893 vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature());
2894 }
2895
2896 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
2897 assert(_owner_offset != 0, "Must be initialized");
2898 return obj->obj_field(_owner_offset);
2899 }
2900
2901 // Compute hard-coded offsets
2902 // Invoked before SystemDictionary::initialize, so pre-loaded classes
2903 // are not available to determine the offset_of_static_fields.
2904 void JavaClasses::compute_hard_coded_offsets() {
2905 const int x = heapOopSize;
2906 const int header = instanceOopDesc::base_offset_in_bytes();
2907
2908 // Do the String Class
2909 java_lang_String::value_offset = java_lang_String::hc_value_offset * x + header;
2910 java_lang_String::offset_offset = java_lang_String::hc_offset_offset * x + header;
2911 java_lang_String::count_offset = java_lang_String::offset_offset + sizeof (jint);
2912 java_lang_String::hash_offset = java_lang_String::count_offset + sizeof (jint);
2913
2914 {
2915 // Do the Class Class
2916 int offset = header;
2917 java_lang_Class::oop_size_offset = header;
2918 offset += BytesPerInt;
2919 java_lang_Class::static_oop_field_count_offset = offset;
2920 offset = align_size_up(offset + BytesPerInt, x);
2921 java_lang_Class::klass_offset = offset;
2922 offset += x;
2923 java_lang_Class::array_klass_offset = offset;
2924 offset += x;
2925 java_lang_Class::resolved_constructor_offset = offset;
2926 }
2927
2928 // This is NOT an offset
2929 java_lang_Class::number_of_fake_oop_fields = java_lang_Class::hc_number_of_fake_oop_fields;
2930
2931 // Throwable Class
2932 java_lang_Throwable::backtrace_offset = java_lang_Throwable::hc_backtrace_offset * x + header;
2933 java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header;
2934 java_lang_Throwable::cause_offset = java_lang_Throwable::hc_cause_offset * x + header;
2935 java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header;
2936
2937 // java_lang_boxing_object
2938 java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header;
2939 java_lang_boxing_object::long_value_offset = align_size_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong);
2940
2941 // java_lang_ref_Reference:
2942 java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header;
2943 java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header;
2944 java_lang_ref_Reference::next_offset = java_lang_ref_Reference::hc_next_offset * x + header;
2945 java_lang_ref_Reference::discovered_offset = java_lang_ref_Reference::hc_discovered_offset * x + header;
2946 java_lang_ref_Reference::static_lock_offset = java_lang_ref_Reference::hc_static_lock_offset * x;
2947 java_lang_ref_Reference::static_pending_offset = java_lang_ref_Reference::hc_static_pending_offset * x;
2948 // Artificial fields for java_lang_ref_Reference
2949 // The first field is for the discovered field added in 1.4
2950 java_lang_ref_Reference::number_of_fake_oop_fields = 1;
2951
2952 // java_lang_ref_SoftReference Class
2953 java_lang_ref_SoftReference::timestamp_offset = align_size_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong);
2954 // Don't multiply static fields because they are always in wordSize units
2955 java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x;
2956
2957 // java_lang_ClassLoader
2958 java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header;
2959
2960 // java_lang_System
2961 java_lang_System::static_in_offset = java_lang_System::hc_static_in_offset * x;
2962 java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x;
2963 java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x;
2964
2965 // java_lang_StackTraceElement
2966 java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset * x + header;
2967 java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header;
2968 java_lang_StackTraceElement::fileName_offset = java_lang_StackTraceElement::hc_fileName_offset * x + header;
2969 java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header;
2970 java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header;
2971 java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header;
2972 java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header;
2973 java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header;
2974 java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header;
2975
2976 }
2977
2978
2979 // Compute non-hard-coded field offsets of all the classes in this file
2980 void JavaClasses::compute_offsets() {
2981
2982 java_lang_Class::compute_offsets();
2983 java_lang_Thread::compute_offsets();
2984 java_lang_ThreadGroup::compute_offsets();
2985 if (EnableInvokeDynamic) {
2986 java_lang_invoke_MethodHandle::compute_offsets();
2987 java_lang_invoke_MemberName::compute_offsets();
2988 java_lang_invoke_DirectMethodHandle::compute_offsets();
2989 java_lang_invoke_BoundMethodHandle::compute_offsets();
2990 java_lang_invoke_AdapterMethodHandle::compute_offsets();
2991 java_lang_invoke_MethodType::compute_offsets();
2992 java_lang_invoke_MethodTypeForm::compute_offsets();
2993 java_lang_invoke_CallSite::compute_offsets();
2994 }
2995 java_security_AccessControlContext::compute_offsets();
2996 // Initialize reflection classes. The layouts of these classes
2997 // changed with the new reflection implementation in JDK 1.4, and
2998 // since the Universe doesn't know what JDK version it is until this
2999 // point we defer computation of these offsets until now.
3000 java_lang_reflect_AccessibleObject::compute_offsets();
3001 java_lang_reflect_Method::compute_offsets();
3002 java_lang_reflect_Constructor::compute_offsets();
3003 java_lang_reflect_Field::compute_offsets();
3004 if (JDK_Version::is_gte_jdk14x_version()) {
3005 java_nio_Buffer::compute_offsets();
3006 }
3007 if (JDK_Version::is_gte_jdk15x_version()) {
3008 sun_reflect_ConstantPool::compute_offsets();
3009 sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets();
3010 }
3011 sun_misc_AtomicLongCSImpl::compute_offsets();
3012
3013 // generated interpreter code wants to know about the offsets we just computed:
3014 AbstractAssembler::update_delayed_values();
3015 }
3016
3017 #ifndef PRODUCT
3018
3019 // These functions exist to assert the validity of hard-coded field offsets to guard
3020 // against changes in the class files
3021
3022 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
3023 EXCEPTION_MARK;
3024 fieldDescriptor fd;
3025 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3026 klassOop k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3027 instanceKlassHandle h_klass (THREAD, k);
3028 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3029 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3030 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3031 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
3032 return false;
3033 }
3034 if (fd.is_static()) {
3035 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
3036 return false;
3037 }
3038 if (fd.offset() == hardcoded_offset ) {
3039 return true;
3040 } else {
3041 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
3042 klass_name, field_name, hardcoded_offset, fd.offset());
3043 return false;
3044 }
3045 }
3046
3047
3048 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
3049 EXCEPTION_MARK;
3050 fieldDescriptor fd;
3051 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3052 klassOop k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3053 instanceKlassHandle h_klass (THREAD, k);
3054 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3055 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3056 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3057 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3058 return false;
3059 }
3060 if (!fd.is_static()) {
3061 tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name);
3062 return false;
3063 }
3064 if (fd.offset() == hardcoded_offset + instanceMirrorKlass::offset_of_static_fields()) {
3065 return true;
3066 } else {
3067 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() - instanceMirrorKlass::offset_of_static_fields());
3068 return false;
3069 }
3070 }
3071
3072
3073 bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) {
3074 EXCEPTION_MARK;
3075 fieldDescriptor fd;
3076 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3077 klassOop k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3078 instanceKlassHandle h_klass (THREAD, k);
3079 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3080 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3081 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3082 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3083 return false;
3084 }
3085 if (!fd.is_static() || !fd.has_initial_value()) {
3086 tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name);
3087 return false;
3088 }
3089 if (!fd.initial_value_tag().is_int()) {
3090 tty->print_cr("Static field %s.%s is not an int", klass_name, field_name);
3091 return false;
3092 }
3093 jint field_value = fd.int_initial_value();
3094 if (field_value == hardcoded_constant) {
3095 return true;
3096 } else {
3097 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);
3098 return false;
3099 }
3100 }
3101
3102
3103 // Check the hard-coded field offsets of all the classes in this file
3104
3105 void JavaClasses::check_offsets() {
3106 bool valid = true;
3107
3108 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3109 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
3110
3111 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3112 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
3113
3114 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3115 valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig)
3116
3117 #define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \
3118 valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig)
3119
3120 // java.lang.String
3121
3122 CHECK_OFFSET("java/lang/String", java_lang_String, value, "[C");
3123 CHECK_OFFSET("java/lang/String", java_lang_String, offset, "I");
3124 CHECK_OFFSET("java/lang/String", java_lang_String, count, "I");
3125 CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I");
3126
3127 // java.lang.Class
3128
3129 // Fake fields
3130 // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked
3131 // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked
3132 // CHECK_OFFSET("java/lang/Class", java_lang_Class, resolved_constructor); // %%% this needs to be checked
3133
3134 // java.lang.Throwable
3135
3136 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;");
3137 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;");
3138 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, cause, "Ljava/lang/Throwable;");
3139 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;");
3140
3141 // Boxed primitive objects (java_lang_boxing_object)
3142
3143 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
3144 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
3145 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
3146 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
3147 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
3148 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
3149 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
3150 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
3151
3152 // java.lang.ClassLoader
3153
3154 CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent, "Ljava/lang/ClassLoader;");
3155
3156 // java.lang.System
3157
3158 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, in, "Ljava/io/InputStream;");
3159 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;");
3160 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;");
3161
3162 // java.lang.StackTraceElement
3163
3164 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;");
3165 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;");
3166 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, fileName, "Ljava/lang/String;");
3167 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I");
3168
3169 // java.lang.ref.Reference
3170
3171 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
3172 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
3173 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
3174 // Fake field
3175 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
3176 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, lock, "Ljava/lang/ref/Reference$Lock;");
3177 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, pending, "Ljava/lang/ref/Reference;");
3178
3179 // java.lang.ref.SoftReference
3180
3181 CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J");
3182 CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J");
3183
3184 // java.lang.AssertionStatusDirectives
3185 //
3186 // The CheckAssertionStatusDirectives boolean can be removed from here and
3187 // globals.hpp after the AssertionStatusDirectives class has been integrated
3188 // into merlin "for some time." Without it, the vm will fail with early
3189 // merlin builds.
3190
3191 if (CheckAssertionStatusDirectives && JDK_Version::is_gte_jdk14x_version()) {
3192 const char* nm = "java/lang/AssertionStatusDirectives";
3193 const char* sig = "[Ljava/lang/String;";
3194 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig);
3195 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z");
3196 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig);
3197 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z");
3198 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z");
3199 }
3200
3201 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
3202 }
3203
3204 #endif // PRODUCT
3205
3206 void javaClasses_init() {
3207 JavaClasses::compute_offsets();
3208 JavaClasses::check_offsets();
3209 FilteredFieldsMap::initialize(); // must be done after computing offsets.
3210 }