1 /*
2 * Copyright (c) 1997, 2010, 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 // Helpful routine for computing field offsets at run time rather than hardcoding them
71 static void
72 compute_offset(int &dest_offset,
73 klassOop klass_oop, Symbol* name_symbol, Symbol* signature_symbol,
74 bool allow_super = false) {
75 fieldDescriptor fd;
76 instanceKlass* ik = instanceKlass::cast(klass_oop);
77 if (!find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) {
78 ResourceMark rm;
79 tty->print_cr("Invalid layout of %s at %s", ik->external_name(), name_symbol->as_C_string());
80 fatal("Invalid layout of preloaded class");
81 }
82 dest_offset = fd.offset();
83 }
84
85 // Same as above but for "optional" offsets that might not be present in certain JDK versions
86 static void
87 compute_optional_offset(int& dest_offset,
88 klassOop klass_oop, Symbol* name_symbol, Symbol* signature_symbol,
89 bool allow_super = false) {
90 fieldDescriptor fd;
91 instanceKlass* ik = instanceKlass::cast(klass_oop);
92 if (find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) {
93 dest_offset = fd.offset();
94 }
95 }
96
97
98 Handle java_lang_String::basic_create(int length, bool tenured, TRAPS) {
99 // Create the String object first, so there's a chance that the String
100 // and the char array it points to end up in the same cache line.
101 oop obj;
102 if (tenured) {
103 obj = instanceKlass::cast(SystemDictionary::String_klass())->allocate_permanent_instance(CHECK_NH);
104 } else {
105 obj = instanceKlass::cast(SystemDictionary::String_klass())->allocate_instance(CHECK_NH);
106 }
107
108 // Create the char array. The String object must be handlized here
109 // because GC can happen as a result of the allocation attempt.
110 Handle h_obj(THREAD, obj);
111 typeArrayOop buffer;
112 if (tenured) {
113 buffer = oopFactory::new_permanent_charArray(length, CHECK_NH);
114 } else {
115 buffer = oopFactory::new_charArray(length, CHECK_NH);
116 }
117
118 // Point the String at the char array
119 obj = h_obj();
120 set_value(obj, buffer);
121 // No need to zero the offset, allocation zero'ed the entire String object
122 assert(offset(obj) == 0, "initial String offset should be zero");
123 //set_offset(obj, 0);
124 set_count(obj, length);
125
126 return h_obj;
127 }
128
129 Handle java_lang_String::basic_create_from_unicode(jchar* unicode, int length, bool tenured, TRAPS) {
130 Handle h_obj = basic_create(length, tenured, CHECK_NH);
131 typeArrayOop buffer = value(h_obj());
132 for (int index = 0; index < length; index++) {
133 buffer->char_at_put(index, unicode[index]);
134 }
135 return h_obj;
136 }
137
138 Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) {
139 return basic_create_from_unicode(unicode, length, false, CHECK_NH);
140 }
141
142 Handle java_lang_String::create_tenured_from_unicode(jchar* unicode, int length, TRAPS) {
143 return basic_create_from_unicode(unicode, length, true, CHECK_NH);
144 }
145
146 oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) {
147 Handle h_obj = basic_create_from_unicode(unicode, length, false, CHECK_0);
148 return h_obj();
149 }
150
151 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
152 if (utf8_str == NULL) {
153 return Handle();
154 }
155 int length = UTF8::unicode_length(utf8_str);
156 Handle h_obj = basic_create(length, false, CHECK_NH);
157 if (length > 0) {
158 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
159 }
160 return h_obj;
161 }
162
163 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
164 Handle h_obj = create_from_str(utf8_str, CHECK_0);
165 return h_obj();
166 }
167
168 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) {
169 int length = UTF8::unicode_length((char*)symbol->bytes(), symbol->utf8_length());
170 Handle h_obj = basic_create(length, false, CHECK_NH);
171 if (length > 0) {
172 UTF8::convert_to_unicode((char*)symbol->bytes(), value(h_obj())->char_at_addr(0), length);
173 }
174 return h_obj;
175 }
176
177 // Converts a C string to a Java String based on current encoding
178 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
179 assert(str != NULL, "bad arguments");
180
181 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *);
182 static to_java_string_fn_t _to_java_string_fn = NULL;
183
184 if (_to_java_string_fn == NULL) {
185 void *lib_handle = os::native_java_library();
186 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform"));
187 if (_to_java_string_fn == NULL) {
188 fatal("NewStringPlatform missing");
189 }
190 }
191
192 jstring js = NULL;
193 { JavaThread* thread = (JavaThread*)THREAD;
194 assert(thread->is_Java_thread(), "must be java thread");
195 HandleMark hm(thread);
196 ThreadToNativeFromVM ttn(thread);
197 js = (_to_java_string_fn)(thread->jni_environment(), str);
198 }
199 return Handle(THREAD, JNIHandles::resolve(js));
200 }
201
202 // Converts a Java String to a native C string that can be used for
203 // native OS calls.
204 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
205
206 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
207 static to_platform_string_fn_t _to_platform_string_fn = NULL;
208
209 if (_to_platform_string_fn == NULL) {
210 void *lib_handle = os::native_java_library();
211 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
212 if (_to_platform_string_fn == NULL) {
213 fatal("GetStringPlatformChars missing");
214 }
215 }
216
217 char *native_platform_string;
218 { JavaThread* thread = (JavaThread*)THREAD;
219 assert(thread->is_Java_thread(), "must be java thread");
220 JNIEnv *env = thread->jni_environment();
221 jstring js = (jstring) JNIHandles::make_local(env, java_string());
222 bool is_copy;
223 HandleMark hm(thread);
224 ThreadToNativeFromVM ttn(thread);
225 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
226 assert(is_copy == JNI_TRUE, "is_copy value changed");
227 JNIHandles::destroy_local(js);
228 }
229 return native_platform_string;
230 }
231
232 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) {
233 oop obj = java_string();
234 // Typical usage is to convert all '/' to '.' in string.
235 typeArrayOop value = java_lang_String::value(obj);
236 int offset = java_lang_String::offset(obj);
237 int length = java_lang_String::length(obj);
238
239 // First check if any from_char exist
240 int index; // Declared outside, used later
241 for (index = 0; index < length; index++) {
242 if (value->char_at(index + offset) == from_char) {
243 break;
244 }
245 }
246 if (index == length) {
247 // No from_char, so do not copy.
248 return java_string;
249 }
250
251 // Create new UNICODE buffer. Must handlize value because GC
252 // may happen during String and char array creation.
253 typeArrayHandle h_value(THREAD, value);
254 Handle string = basic_create(length, false, CHECK_NH);
255
256 typeArrayOop from_buffer = h_value();
257 typeArrayOop to_buffer = java_lang_String::value(string());
258
259 // Copy contents
260 for (index = 0; index < length; index++) {
261 jchar c = from_buffer->char_at(index + offset);
262 if (c == from_char) {
263 c = to_char;
264 }
265 to_buffer->char_at_put(index, c);
266 }
267 return string;
268 }
269
270 jchar* java_lang_String::as_unicode_string(oop java_string, int& length) {
271 typeArrayOop value = java_lang_String::value(java_string);
272 int offset = java_lang_String::offset(java_string);
273 length = java_lang_String::length(java_string);
274
275 jchar* result = NEW_RESOURCE_ARRAY(jchar, length);
276 for (int index = 0; index < length; index++) {
277 result[index] = value->char_at(index + offset);
278 }
279 return result;
280 }
281
282 Symbol* java_lang_String::as_symbol(Handle java_string, TRAPS) {
283 oop obj = java_string();
284 typeArrayOop value = java_lang_String::value(obj);
285 int offset = java_lang_String::offset(obj);
286 int length = java_lang_String::length(obj);
287 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
288 Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD);
289 return sym;
290 }
291
292 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
293 typeArrayOop value = java_lang_String::value(java_string);
294 int offset = java_lang_String::offset(java_string);
295 int length = java_lang_String::length(java_string);
296 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
297 return SymbolTable::probe_unicode(base, length);
298 }
299
300
301 int java_lang_String::utf8_length(oop java_string) {
302 typeArrayOop value = java_lang_String::value(java_string);
303 int offset = java_lang_String::offset(java_string);
304 int length = java_lang_String::length(java_string);
305 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
306 return UNICODE::utf8_length(position, length);
307 }
308
309 char* java_lang_String::as_utf8_string(oop java_string) {
310 typeArrayOop value = java_lang_String::value(java_string);
311 int offset = java_lang_String::offset(java_string);
312 int length = java_lang_String::length(java_string);
313 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
314 return UNICODE::as_utf8(position, length);
315 }
316
317 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) {
318 typeArrayOop value = java_lang_String::value(java_string);
319 int offset = java_lang_String::offset(java_string);
320 int length = java_lang_String::length(java_string);
321 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
322 return UNICODE::as_utf8(position, length, buf, buflen);
323 }
324
325 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
326 typeArrayOop value = java_lang_String::value(java_string);
327 int offset = java_lang_String::offset(java_string);
328 int length = java_lang_String::length(java_string);
329 assert(start + len <= length, "just checking");
330 jchar* position = value->char_at_addr(offset + start);
331 return UNICODE::as_utf8(position, len);
332 }
333
334 bool java_lang_String::equals(oop java_string, jchar* chars, int len) {
335 assert(SharedSkipVerify ||
336 java_string->klass() == SystemDictionary::String_klass(),
337 "must be java_string");
338 typeArrayOop value = java_lang_String::value(java_string);
339 int offset = java_lang_String::offset(java_string);
340 int length = java_lang_String::length(java_string);
341 if (length != len) {
342 return false;
343 }
344 for (int i = 0; i < len; i++) {
345 if (value->char_at(i + offset) != chars[i]) {
346 return false;
347 }
348 }
349 return true;
350 }
351
352 void java_lang_String::print(Handle java_string, outputStream* st) {
353 oop obj = java_string();
354 assert(obj->klass() == SystemDictionary::String_klass(), "must be java_string");
355 typeArrayOop value = java_lang_String::value(obj);
356 int offset = java_lang_String::offset(obj);
357 int length = java_lang_String::length(obj);
358
359 int end = MIN2(length, 100);
360 if (value == NULL) {
361 // This can happen if, e.g., printing a String
362 // object before its initializer has been called
363 st->print_cr("NULL");
364 } else {
365 st->print("\"");
366 for (int index = 0; index < length; index++) {
367 st->print("%c", value->char_at(index + offset));
368 }
369 st->print("\"");
370 }
371 }
372
373 static void initialize_static_field(fieldDescriptor* fd, TRAPS) {
374 Handle mirror (THREAD, fd->field_holder()->java_mirror());
375 assert(mirror.not_null() && fd->is_static(), "just checking");
376 if (fd->has_initial_value()) {
377 BasicType t = fd->field_type();
378 switch (t) {
379 case T_BYTE:
380 mirror()->byte_field_put(fd->offset(), fd->int_initial_value());
381 break;
382 case T_BOOLEAN:
383 mirror()->bool_field_put(fd->offset(), fd->int_initial_value());
384 break;
385 case T_CHAR:
386 mirror()->char_field_put(fd->offset(), fd->int_initial_value());
387 break;
388 case T_SHORT:
389 mirror()->short_field_put(fd->offset(), fd->int_initial_value());
390 break;
391 case T_INT:
392 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
393 break;
394 case T_FLOAT:
395 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
396 break;
397 case T_DOUBLE:
398 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
399 break;
400 case T_LONG:
401 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
402 break;
403 case T_OBJECT:
404 {
405 #ifdef ASSERT
406 TempNewSymbol sym = SymbolTable::new_symbol("Ljava/lang/String;", CHECK);
407 assert(fd->signature() == sym, "just checking");
408 #endif
409 oop string = fd->string_initial_value(CHECK);
410 mirror()->obj_field_put(fd->offset(), string);
411 }
412 break;
413 default:
414 THROW_MSG(vmSymbols::java_lang_ClassFormatError(),
415 "Illegal ConstantValue attribute in class file");
416 }
417 }
418 }
419
420
421 // During bootstrap, java.lang.Class wasn't loaded so static field
422 // offsets were computed without the size added it. Go back and
423 // update all the static field offsets to included the size.
424 static void fixup_static_field(fieldDescriptor* fd, TRAPS) {
425 if (fd->is_static()) {
426 int real_offset = fd->offset() + instanceMirrorKlass::offset_of_static_fields();
427 typeArrayOop fields = instanceKlass::cast(fd->field_holder())->fields();
428 fields->short_at_put(fd->index() + instanceKlass::low_offset, extract_low_short_from_int(real_offset));
429 fields->short_at_put(fd->index() + instanceKlass::high_offset, extract_high_short_from_int(real_offset));
430 }
431 }
432
433 oop java_lang_Class::fixup_mirror(KlassHandle k, TRAPS) {
434 // Cache the start of the static fields
435 if (instanceMirrorKlass::offset_of_static_fields() == 0) {
436 instanceMirrorKlass::set_offset_of_static_fields(instanceMirrorKlass::cast(SystemDictionary::Class_klass())->size_helper() << LogHeapWordSize);
437 }
438
439 if (k->oop_is_instance()) {
440 // Fixup the offsets
441 instanceKlass::cast(k())->do_local_static_fields(&fixup_static_field, CHECK_NULL);
442 }
443 create_mirror(k, CHECK_NULL);
444 }
445
446 oop java_lang_Class::create_mirror(KlassHandle k, TRAPS) {
447 assert(k->java_mirror() == NULL, "should only assign mirror once");
448 // Use this moment of initialization to cache modifier_flags also,
449 // to support Class.getModifiers(). Instance classes recalculate
450 // the cached flags after the class file is parsed, but before the
451 // class is put into the system dictionary.
452 int computed_modifiers = k->compute_modifier_flags(CHECK_0);
453 k->set_modifier_flags(computed_modifiers);
454 if (SystemDictionary::Class_klass_loaded() && (k->oop_is_instance() || k->oop_is_javaArray())) {
455 // Allocate mirror (java.lang.Class instance)
456 Handle mirror = instanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_permanent_instance(k, CHECK_0);
457 // Setup indirections
458 mirror->obj_field_put(klass_offset, k());
459 k->set_java_mirror(mirror());
460
461 instanceMirrorKlass* mk = instanceMirrorKlass::cast(mirror->klass());
462 java_lang_Class::set_oop_size(mirror(), mk->instance_size(k));
463 java_lang_Class::set_static_oop_field_size(mirror(), mk->compute_static_oop_field_size(mirror()));
464
465 // It might also have a component mirror. This mirror must already exist.
466 if (k->oop_is_javaArray()) {
467 Handle comp_mirror;
468 if (k->oop_is_typeArray()) {
469 BasicType type = typeArrayKlass::cast(k->as_klassOop())->element_type();
470 comp_mirror = Universe::java_mirror(type);
471 assert(comp_mirror.not_null(), "must have primitive mirror");
472 } else if (k->oop_is_objArray()) {
473 klassOop element_klass = objArrayKlass::cast(k->as_klassOop())->element_klass();
474 if (element_klass != NULL
475 && (Klass::cast(element_klass)->oop_is_instance() ||
476 Klass::cast(element_klass)->oop_is_javaArray())) {
477 comp_mirror = Klass::cast(element_klass)->java_mirror();
478 assert(comp_mirror.not_null(), "must have element mirror");
479 }
480 // else some object array internal to the VM, like systemObjArrayKlassObj
481 }
482 if (comp_mirror.not_null()) {
483 // Two-way link between the array klass and its component mirror:
484 arrayKlass::cast(k->as_klassOop())->set_component_mirror(comp_mirror());
485 set_array_klass(comp_mirror(), k->as_klassOop());
486 }
487 }
488 if (k->oop_is_instance()) {
489 // Initialize static fields
490 instanceKlass::cast(k())->do_local_static_fields(&initialize_static_field, CHECK_NULL);
491 }
492 return mirror();
493 } else {
494 return NULL;
495 }
496 }
497
498
499
500 int java_lang_Class::oop_size(oop java_class) {
501 return java_class->int_field(oop_size_offset);
502 }
503 void java_lang_Class::set_oop_size(oop java_class, int size) {
504 java_class->int_field_put(oop_size_offset, size);
505 }
506 int java_lang_Class::static_oop_field_size(oop java_class) {
507 return java_class->int_field(static_oop_field_size_offset);
508 }
509 void java_lang_Class::set_static_oop_field_size(oop java_class, int size) {
510 java_class->int_field_put(static_oop_field_size_offset, size);
511 }
512
513
514
515
516 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
517 // This should be improved by adding a field at the Java level or by
518 // introducing a new VM klass (see comment in ClassFileParser)
519 oop java_class = instanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_permanent_instance((oop)NULL, CHECK_0);
520 if (type != T_VOID) {
521 klassOop aklass = Universe::typeArrayKlassObj(type);
522 assert(aklass != NULL, "correct bootstrap");
523 set_array_klass(java_class, aklass);
524 }
525 instanceMirrorKlass* mk = instanceMirrorKlass::cast(SystemDictionary::Class_klass());
526 java_lang_Class::set_oop_size(java_class, mk->instance_size(oop(NULL)));
527 java_lang_Class::set_static_oop_field_size(java_class, 0);
528 return java_class;
529 }
530
531
532 klassOop java_lang_Class::as_klassOop(oop java_class) {
533 //%note memory_2
534 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
535 klassOop k = klassOop(java_class->obj_field(klass_offset));
536 assert(k == NULL || k->is_klass(), "type check");
537 return k;
538 }
539
540
541 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
542 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
543 Symbol* name = NULL;
544 bool is_instance = false;
545 if (is_primitive(java_class)) {
546 name = vmSymbols::type_signature(primitive_type(java_class));
547 } else {
548 klassOop k = as_klassOop(java_class);
549 is_instance = Klass::cast(k)->oop_is_instance();
550 name = Klass::cast(k)->name();
551 }
552 if (name == NULL) {
553 st->print("<null>");
554 return;
555 }
556 if (is_instance) st->print("L");
557 st->write((char*) name->base(), (int) name->utf8_length());
558 if (is_instance) st->print(";");
559 }
560
561 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) {
562 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
563 Symbol* name;
564 if (is_primitive(java_class)) {
565 name = vmSymbols::type_signature(primitive_type(java_class));
566 // Because this can create a new symbol, the caller has to decrement
567 // the refcount, so make adjustment here and below for symbols returned
568 // that are not created or incremented due to a successful lookup.
569 name->increment_refcount();
570 } else {
571 klassOop k = as_klassOop(java_class);
572 if (!Klass::cast(k)->oop_is_instance()) {
573 name = Klass::cast(k)->name();
574 name->increment_refcount();
575 } else {
576 ResourceMark rm;
577 const char* sigstr = Klass::cast(k)->signature_name();
578 int siglen = (int) strlen(sigstr);
579 if (!intern_if_not_found) {
580 name = SymbolTable::probe(sigstr, siglen);
581 } else {
582 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
583 }
584 }
585 }
586 return name;
587 }
588
589
590 klassOop java_lang_Class::array_klass(oop java_class) {
591 klassOop k = klassOop(java_class->obj_field(array_klass_offset));
592 assert(k == NULL || k->is_klass() && Klass::cast(k)->oop_is_javaArray(), "should be array klass");
593 return k;
594 }
595
596
597 void java_lang_Class::set_array_klass(oop java_class, klassOop klass) {
598 assert(klass->is_klass() && Klass::cast(klass)->oop_is_javaArray(), "should be array klass");
599 java_class->obj_field_put(array_klass_offset, klass);
600 }
601
602
603 methodOop java_lang_Class::resolved_constructor(oop java_class) {
604 oop constructor = java_class->obj_field(resolved_constructor_offset);
605 assert(constructor == NULL || constructor->is_method(), "should be method");
606 return methodOop(constructor);
607 }
608
609
610 void java_lang_Class::set_resolved_constructor(oop java_class, methodOop constructor) {
611 assert(constructor->is_method(), "should be method");
612 java_class->obj_field_put(resolved_constructor_offset, constructor);
613 }
614
615
616 bool java_lang_Class::is_primitive(oop java_class) {
617 // should assert:
618 //assert(java_lang_Class::is_instance(java_class), "must be a Class object");
619 klassOop k = klassOop(java_class->obj_field(klass_offset));
620 return k == NULL;
621 }
622
623
624 BasicType java_lang_Class::primitive_type(oop java_class) {
625 assert(java_lang_Class::is_primitive(java_class), "just checking");
626 klassOop ak = klassOop(java_class->obj_field(array_klass_offset));
627 BasicType type = T_VOID;
628 if (ak != NULL) {
629 // Note: create_basic_type_mirror above initializes ak to a non-null value.
630 type = arrayKlass::cast(ak)->element_type();
631 } else {
632 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
633 }
634 assert(Universe::java_mirror(type) == java_class, "must be consistent");
635 return type;
636 }
637
638 BasicType java_lang_Class::as_BasicType(oop java_class, klassOop* reference_klass) {
639 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
640 if (is_primitive(java_class)) {
641 if (reference_klass != NULL)
642 (*reference_klass) = NULL;
643 return primitive_type(java_class);
644 } else {
645 if (reference_klass != NULL)
646 (*reference_klass) = as_klassOop(java_class);
647 return T_OBJECT;
648 }
649 }
650
651
652 oop java_lang_Class::primitive_mirror(BasicType t) {
653 oop mirror = Universe::java_mirror(t);
654 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class");
655 assert(java_lang_Class::is_primitive(mirror), "must be primitive");
656 return mirror;
657 }
658
659 bool java_lang_Class::offsets_computed = false;
660 int java_lang_Class::classRedefinedCount_offset = -1;
661 int java_lang_Class::parallelCapable_offset = -1;
662
663 void java_lang_Class::compute_offsets() {
664 assert(!offsets_computed, "offsets should be initialized only once");
665 offsets_computed = true;
666
667 klassOop k = SystemDictionary::Class_klass();
668 // The classRedefinedCount field is only present starting in 1.5,
669 // so don't go fatal.
670 compute_optional_offset(classRedefinedCount_offset,
671 k, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature());
672
673 // The field indicating parallelCapable (parallelLockMap) is only present starting in 7,
674 klassOop k1 = SystemDictionary::ClassLoader_klass();
675 compute_optional_offset(parallelCapable_offset,
676 k1, vmSymbols::parallelCapable_name(), vmSymbols::concurrenthashmap_signature());
677 }
678
679 // For class loader classes, parallelCapable defined
680 // based on non-null field
681 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
682 bool java_lang_Class::parallelCapable(oop class_loader) {
683 if (!JDK_Version::is_gte_jdk17x_version()
684 || parallelCapable_offset == -1) {
685 // Default for backward compatibility is false
686 return false;
687 }
688 return (class_loader->obj_field(parallelCapable_offset) != NULL);
689 }
690
691 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
692 if (!JDK_Version::is_gte_jdk15x_version()
693 || classRedefinedCount_offset == -1) {
694 // The classRedefinedCount field is only present starting in 1.5.
695 // If we don't have an offset for it then just return -1 as a marker.
696 return -1;
697 }
698
699 return the_class_mirror->int_field(classRedefinedCount_offset);
700 }
701
702 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
703 if (!JDK_Version::is_gte_jdk15x_version()
704 || classRedefinedCount_offset == -1) {
705 // The classRedefinedCount field is only present starting in 1.5.
706 // If we don't have an offset for it then nothing to set.
707 return;
708 }
709
710 the_class_mirror->int_field_put(classRedefinedCount_offset, value);
711 }
712
713
714 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
715 // platform thread structure, and a eetop offset which was used for thread
716 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
717 // merged, so in the HotSpot VM we just use the eetop field for the thread
718 // instead of the privateInfo_offset.
719 //
720 // Note: The stackSize field is only present starting in 1.4.
721
722 int java_lang_Thread::_name_offset = 0;
723 int java_lang_Thread::_group_offset = 0;
724 int java_lang_Thread::_contextClassLoader_offset = 0;
725 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
726 int java_lang_Thread::_priority_offset = 0;
727 int java_lang_Thread::_eetop_offset = 0;
728 int java_lang_Thread::_daemon_offset = 0;
729 int java_lang_Thread::_stillborn_offset = 0;
730 int java_lang_Thread::_stackSize_offset = 0;
731 int java_lang_Thread::_tid_offset = 0;
732 int java_lang_Thread::_thread_status_offset = 0;
733 int java_lang_Thread::_park_blocker_offset = 0;
734 int java_lang_Thread::_park_event_offset = 0 ;
735
736
737 void java_lang_Thread::compute_offsets() {
738 assert(_group_offset == 0, "offsets should be initialized only once");
739
740 klassOop k = SystemDictionary::Thread_klass();
741 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::char_array_signature());
742 compute_offset(_group_offset, k, vmSymbols::group_name(), vmSymbols::threadgroup_signature());
743 compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature());
744 compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature());
745 compute_offset(_priority_offset, k, vmSymbols::priority_name(), vmSymbols::int_signature());
746 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
747 compute_offset(_eetop_offset, k, vmSymbols::eetop_name(), vmSymbols::long_signature());
748 compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature());
749 // The stackSize field is only present starting in 1.4, so don't go fatal.
750 compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature());
751 // The tid and thread_status fields are only present starting in 1.5, so don't go fatal.
752 compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature());
753 compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature());
754 // The parkBlocker field is only present starting in 1.6, so don't go fatal.
755 compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature());
756 compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(),
757 vmSymbols::long_signature());
758 }
759
760
761 JavaThread* java_lang_Thread::thread(oop java_thread) {
762 return (JavaThread*)java_thread->address_field(_eetop_offset);
763 }
764
765
766 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
767 java_thread->address_field_put(_eetop_offset, (address)thread);
768 }
769
770
771 typeArrayOop java_lang_Thread::name(oop java_thread) {
772 oop name = java_thread->obj_field(_name_offset);
773 assert(name == NULL || (name->is_typeArray() && typeArrayKlass::cast(name->klass())->element_type() == T_CHAR), "just checking");
774 return typeArrayOop(name);
775 }
776
777
778 void java_lang_Thread::set_name(oop java_thread, typeArrayOop name) {
779 assert(java_thread->obj_field(_name_offset) == NULL, "name should be NULL");
780 java_thread->obj_field_put(_name_offset, name);
781 }
782
783
784 ThreadPriority java_lang_Thread::priority(oop java_thread) {
785 return (ThreadPriority)java_thread->int_field(_priority_offset);
786 }
787
788
789 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
790 java_thread->int_field_put(_priority_offset, priority);
791 }
792
793
794 oop java_lang_Thread::threadGroup(oop java_thread) {
795 return java_thread->obj_field(_group_offset);
796 }
797
798
799 bool java_lang_Thread::is_stillborn(oop java_thread) {
800 return java_thread->bool_field(_stillborn_offset) != 0;
801 }
802
803
804 // We never have reason to turn the stillborn bit off
805 void java_lang_Thread::set_stillborn(oop java_thread) {
806 java_thread->bool_field_put(_stillborn_offset, true);
807 }
808
809
810 bool java_lang_Thread::is_alive(oop java_thread) {
811 JavaThread* thr = java_lang_Thread::thread(java_thread);
812 return (thr != NULL);
813 }
814
815
816 bool java_lang_Thread::is_daemon(oop java_thread) {
817 return java_thread->bool_field(_daemon_offset) != 0;
818 }
819
820
821 void java_lang_Thread::set_daemon(oop java_thread) {
822 java_thread->bool_field_put(_daemon_offset, true);
823 }
824
825 oop java_lang_Thread::context_class_loader(oop java_thread) {
826 return java_thread->obj_field(_contextClassLoader_offset);
827 }
828
829 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
830 return java_thread->obj_field(_inheritedAccessControlContext_offset);
831 }
832
833
834 jlong java_lang_Thread::stackSize(oop java_thread) {
835 // The stackSize field is only present starting in 1.4
836 if (_stackSize_offset > 0) {
837 assert(JDK_Version::is_gte_jdk14x_version(), "sanity check");
838 return java_thread->long_field(_stackSize_offset);
839 } else {
840 return 0;
841 }
842 }
843
844 // Write the thread status value to threadStatus field in java.lang.Thread java class.
845 void java_lang_Thread::set_thread_status(oop java_thread,
846 java_lang_Thread::ThreadStatus status) {
847 assert(JavaThread::current()->thread_state() == _thread_in_vm, "Java Thread is not running in vm");
848 // The threadStatus is only present starting in 1.5
849 if (_thread_status_offset > 0) {
850 java_thread->int_field_put(_thread_status_offset, status);
851 }
852 }
853
854 // Read thread status value from threadStatus field in java.lang.Thread java class.
855 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
856 assert(Thread::current()->is_VM_thread() ||
857 JavaThread::current()->thread_state() == _thread_in_vm,
858 "Java Thread is not running in vm");
859 // The threadStatus is only present starting in 1.5
860 if (_thread_status_offset > 0) {
861 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
862 } else {
863 // All we can easily figure out is if it is alive, but that is
864 // enough info for a valid unknown status.
865 // These aren't restricted to valid set ThreadStatus values, so
866 // use JVMTI values and cast.
867 JavaThread* thr = java_lang_Thread::thread(java_thread);
868 if (thr == NULL) {
869 // the thread hasn't run yet or is in the process of exiting
870 return NEW;
871 }
872 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE;
873 }
874 }
875
876
877 jlong java_lang_Thread::thread_id(oop java_thread) {
878 // The thread ID field is only present starting in 1.5
879 if (_tid_offset > 0) {
880 return java_thread->long_field(_tid_offset);
881 } else {
882 return 0;
883 }
884 }
885
886 oop java_lang_Thread::park_blocker(oop java_thread) {
887 assert(JDK_Version::current().supports_thread_park_blocker() &&
888 _park_blocker_offset != 0, "Must support parkBlocker field");
889
890 if (_park_blocker_offset > 0) {
891 return java_thread->obj_field(_park_blocker_offset);
892 }
893
894 return NULL;
895 }
896
897 jlong java_lang_Thread::park_event(oop java_thread) {
898 if (_park_event_offset > 0) {
899 return java_thread->long_field(_park_event_offset);
900 }
901 return 0;
902 }
903
904 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) {
905 if (_park_event_offset > 0) {
906 java_thread->long_field_put(_park_event_offset, ptr);
907 return true;
908 }
909 return false;
910 }
911
912
913 const char* java_lang_Thread::thread_status_name(oop java_thread) {
914 assert(JDK_Version::is_gte_jdk15x_version() && _thread_status_offset != 0, "Must have thread status");
915 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
916 switch (status) {
917 case NEW : return "NEW";
918 case RUNNABLE : return "RUNNABLE";
919 case SLEEPING : return "TIMED_WAITING (sleeping)";
920 case IN_OBJECT_WAIT : return "WAITING (on object monitor)";
921 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
922 case PARKED : return "WAITING (parking)";
923 case PARKED_TIMED : return "TIMED_WAITING (parking)";
924 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
925 case TERMINATED : return "TERMINATED";
926 default : return "UNKNOWN";
927 };
928 }
929 int java_lang_ThreadGroup::_parent_offset = 0;
930 int java_lang_ThreadGroup::_name_offset = 0;
931 int java_lang_ThreadGroup::_threads_offset = 0;
932 int java_lang_ThreadGroup::_groups_offset = 0;
933 int java_lang_ThreadGroup::_maxPriority_offset = 0;
934 int java_lang_ThreadGroup::_destroyed_offset = 0;
935 int java_lang_ThreadGroup::_daemon_offset = 0;
936 int java_lang_ThreadGroup::_vmAllowSuspension_offset = 0;
937 int java_lang_ThreadGroup::_nthreads_offset = 0;
938 int java_lang_ThreadGroup::_ngroups_offset = 0;
939
940 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
941 assert(java_thread_group->is_oop(), "thread group must be oop");
942 return java_thread_group->obj_field(_parent_offset);
943 }
944
945 // ("name as oop" accessor is not necessary)
946
947 typeArrayOop java_lang_ThreadGroup::name(oop java_thread_group) {
948 oop name = java_thread_group->obj_field(_name_offset);
949 // ThreadGroup.name can be null
950 return name == NULL ? (typeArrayOop)NULL : java_lang_String::value(name);
951 }
952
953 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
954 assert(java_thread_group->is_oop(), "thread group must be oop");
955 return java_thread_group->int_field(_nthreads_offset);
956 }
957
958 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
959 oop threads = java_thread_group->obj_field(_threads_offset);
960 assert(threads != NULL, "threadgroups should have threads");
961 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
962 return objArrayOop(threads);
963 }
964
965 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
966 assert(java_thread_group->is_oop(), "thread group must be oop");
967 return java_thread_group->int_field(_ngroups_offset);
968 }
969
970 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
971 oop groups = java_thread_group->obj_field(_groups_offset);
972 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
973 return objArrayOop(groups);
974 }
975
976 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
977 assert(java_thread_group->is_oop(), "thread group must be oop");
978 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
979 }
980
981 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
982 assert(java_thread_group->is_oop(), "thread group must be oop");
983 return java_thread_group->bool_field(_destroyed_offset) != 0;
984 }
985
986 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
987 assert(java_thread_group->is_oop(), "thread group must be oop");
988 return java_thread_group->bool_field(_daemon_offset) != 0;
989 }
990
991 bool java_lang_ThreadGroup::is_vmAllowSuspension(oop java_thread_group) {
992 assert(java_thread_group->is_oop(), "thread group must be oop");
993 return java_thread_group->bool_field(_vmAllowSuspension_offset) != 0;
994 }
995
996 void java_lang_ThreadGroup::compute_offsets() {
997 assert(_parent_offset == 0, "offsets should be initialized only once");
998
999 klassOop k = SystemDictionary::ThreadGroup_klass();
1000
1001 compute_offset(_parent_offset, k, vmSymbols::parent_name(), vmSymbols::threadgroup_signature());
1002 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1003 compute_offset(_threads_offset, k, vmSymbols::threads_name(), vmSymbols::thread_array_signature());
1004 compute_offset(_groups_offset, k, vmSymbols::groups_name(), vmSymbols::threadgroup_array_signature());
1005 compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature());
1006 compute_offset(_destroyed_offset, k, vmSymbols::destroyed_name(), vmSymbols::bool_signature());
1007 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
1008 compute_offset(_vmAllowSuspension_offset, k, vmSymbols::vmAllowSuspension_name(), vmSymbols::bool_signature());
1009 compute_offset(_nthreads_offset, k, vmSymbols::nthreads_name(), vmSymbols::int_signature());
1010 compute_offset(_ngroups_offset, k, vmSymbols::ngroups_name(), vmSymbols::int_signature());
1011 }
1012
1013 oop java_lang_Throwable::backtrace(oop throwable) {
1014 return throwable->obj_field_acquire(backtrace_offset);
1015 }
1016
1017
1018 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
1019 throwable->release_obj_field_put(backtrace_offset, value);
1020 }
1021
1022
1023 oop java_lang_Throwable::message(oop throwable) {
1024 return throwable->obj_field(detailMessage_offset);
1025 }
1026
1027
1028 oop java_lang_Throwable::message(Handle throwable) {
1029 return throwable->obj_field(detailMessage_offset);
1030 }
1031
1032
1033 void java_lang_Throwable::set_message(oop throwable, oop value) {
1034 throwable->obj_field_put(detailMessage_offset, value);
1035 }
1036
1037
1038 void java_lang_Throwable::clear_stacktrace(oop throwable) {
1039 assert(JDK_Version::is_gte_jdk14x_version(), "should only be called in >= 1.4");
1040 throwable->obj_field_put(stackTrace_offset, NULL);
1041 }
1042
1043
1044 void java_lang_Throwable::print(oop throwable, outputStream* st) {
1045 ResourceMark rm;
1046 klassOop k = throwable->klass();
1047 assert(k != NULL, "just checking");
1048 st->print("%s", instanceKlass::cast(k)->external_name());
1049 oop msg = message(throwable);
1050 if (msg != NULL) {
1051 st->print(": %s", java_lang_String::as_utf8_string(msg));
1052 }
1053 }
1054
1055
1056 void java_lang_Throwable::print(Handle throwable, outputStream* st) {
1057 ResourceMark rm;
1058 klassOop k = throwable->klass();
1059 assert(k != NULL, "just checking");
1060 st->print("%s", instanceKlass::cast(k)->external_name());
1061 oop msg = message(throwable);
1062 if (msg != NULL) {
1063 st->print(": %s", java_lang_String::as_utf8_string(msg));
1064 }
1065 }
1066
1067 // Print stack trace element to resource allocated buffer
1068 char* java_lang_Throwable::print_stack_element_to_buffer(methodOop method, int bci) {
1069 // Get strings and string lengths
1070 instanceKlass* klass = instanceKlass::cast(method->method_holder());
1071 const char* klass_name = klass->external_name();
1072 int buf_len = (int)strlen(klass_name);
1073 char* source_file_name;
1074 if (klass->source_file_name() == NULL) {
1075 source_file_name = NULL;
1076 } else {
1077 source_file_name = klass->source_file_name()->as_C_string();
1078 buf_len += (int)strlen(source_file_name);
1079 }
1080 char* method_name = method->name()->as_C_string();
1081 buf_len += (int)strlen(method_name);
1082
1083 // Allocate temporary buffer with extra space for formatting and line number
1084 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
1085
1086 // Print stack trace line in buffer
1087 sprintf(buf, "\tat %s.%s", klass_name, method_name);
1088 if (method->is_native()) {
1089 strcat(buf, "(Native Method)");
1090 } else {
1091 int line_number = method->line_number_from_bci(bci);
1092 if (source_file_name != NULL && (line_number != -1)) {
1093 // Sourcename and linenumber
1094 sprintf(buf + (int)strlen(buf), "(%s:%d)", source_file_name, line_number);
1095 } else if (source_file_name != NULL) {
1096 // Just sourcename
1097 sprintf(buf + (int)strlen(buf), "(%s)", source_file_name);
1098 } else {
1099 // Neither soucename and linenumber
1100 sprintf(buf + (int)strlen(buf), "(Unknown Source)");
1101 }
1102 nmethod* nm = method->code();
1103 if (WizardMode && nm != NULL) {
1104 sprintf(buf + (int)strlen(buf), "(nmethod " PTR_FORMAT ")", (intptr_t)nm);
1105 }
1106 }
1107
1108 return buf;
1109 }
1110
1111
1112 void java_lang_Throwable::print_stack_element(Handle stream, methodOop method, int bci) {
1113 ResourceMark rm;
1114 char* buf = print_stack_element_to_buffer(method, bci);
1115 print_to_stream(stream, buf);
1116 }
1117
1118 void java_lang_Throwable::print_stack_element(outputStream *st, methodOop method, int bci) {
1119 ResourceMark rm;
1120 char* buf = print_stack_element_to_buffer(method, bci);
1121 st->print_cr("%s", buf);
1122 }
1123
1124 void java_lang_Throwable::print_to_stream(Handle stream, const char* str) {
1125 if (stream.is_null()) {
1126 tty->print_cr("%s", str);
1127 } else {
1128 EXCEPTION_MARK;
1129 JavaValue result(T_VOID);
1130 Handle arg (THREAD, oopFactory::new_charArray(str, THREAD));
1131 if (!HAS_PENDING_EXCEPTION) {
1132 JavaCalls::call_virtual(&result,
1133 stream,
1134 KlassHandle(THREAD, stream->klass()),
1135 vmSymbols::println_name(),
1136 vmSymbols::char_array_void_signature(),
1137 arg,
1138 THREAD);
1139 }
1140 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
1141 if (HAS_PENDING_EXCEPTION) CLEAR_PENDING_EXCEPTION;
1142 }
1143
1144 }
1145
1146
1147 const char* java_lang_Throwable::no_stack_trace_message() {
1148 return "\t<<no stack trace available>>";
1149 }
1150
1151
1152 // Currently used only for exceptions occurring during startup
1153 void java_lang_Throwable::print_stack_trace(oop throwable, outputStream* st) {
1154 Thread *THREAD = Thread::current();
1155 Handle h_throwable(THREAD, throwable);
1156 while (h_throwable.not_null()) {
1157 objArrayHandle result (THREAD, objArrayOop(backtrace(h_throwable())));
1158 if (result.is_null()) {
1159 st->print_cr(no_stack_trace_message());
1160 return;
1161 }
1162
1163 while (result.not_null()) {
1164 objArrayHandle methods (THREAD,
1165 objArrayOop(result->obj_at(trace_methods_offset)));
1166 typeArrayHandle bcis (THREAD,
1167 typeArrayOop(result->obj_at(trace_bcis_offset)));
1168
1169 if (methods.is_null() || bcis.is_null()) {
1170 st->print_cr(no_stack_trace_message());
1171 return;
1172 }
1173
1174 int length = methods()->length();
1175 for (int index = 0; index < length; index++) {
1176 methodOop method = methodOop(methods()->obj_at(index));
1177 if (method == NULL) goto handle_cause;
1178 int bci = bcis->ushort_at(index);
1179 print_stack_element(st, method, bci);
1180 }
1181 result = objArrayHandle(THREAD, objArrayOop(result->obj_at(trace_next_offset)));
1182 }
1183 handle_cause:
1184 {
1185 EXCEPTION_MARK;
1186 JavaValue result(T_OBJECT);
1187 JavaCalls::call_virtual(&result,
1188 h_throwable,
1189 KlassHandle(THREAD, h_throwable->klass()),
1190 vmSymbols::getCause_name(),
1191 vmSymbols::void_throwable_signature(),
1192 THREAD);
1193 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
1194 if (HAS_PENDING_EXCEPTION) {
1195 CLEAR_PENDING_EXCEPTION;
1196 h_throwable = Handle();
1197 } else {
1198 h_throwable = Handle(THREAD, (oop) result.get_jobject());
1199 if (h_throwable.not_null()) {
1200 st->print("Caused by: ");
1201 print(h_throwable, st);
1202 st->cr();
1203 }
1204 }
1205 }
1206 }
1207 }
1208
1209
1210 void java_lang_Throwable::print_stack_trace(oop throwable, oop print_stream) {
1211 // Note: this is no longer used in Merlin, but we support it for compatibility.
1212 Thread *thread = Thread::current();
1213 Handle stream(thread, print_stream);
1214 objArrayHandle result (thread, objArrayOop(backtrace(throwable)));
1215 if (result.is_null()) {
1216 print_to_stream(stream, no_stack_trace_message());
1217 return;
1218 }
1219
1220 while (result.not_null()) {
1221 objArrayHandle methods (thread,
1222 objArrayOop(result->obj_at(trace_methods_offset)));
1223 typeArrayHandle bcis (thread,
1224 typeArrayOop(result->obj_at(trace_bcis_offset)));
1225
1226 if (methods.is_null() || bcis.is_null()) {
1227 print_to_stream(stream, no_stack_trace_message());
1228 return;
1229 }
1230
1231 int length = methods()->length();
1232 for (int index = 0; index < length; index++) {
1233 methodOop method = methodOop(methods()->obj_at(index));
1234 if (method == NULL) return;
1235 int bci = bcis->ushort_at(index);
1236 print_stack_element(stream, method, bci);
1237 }
1238 result = objArrayHandle(thread, objArrayOop(result->obj_at(trace_next_offset)));
1239 }
1240 }
1241
1242 // This class provides a simple wrapper over the internal structure of
1243 // exception backtrace to insulate users of the backtrace from needing
1244 // to know what it looks like.
1245 class BacktraceBuilder: public StackObj {
1246 private:
1247 Handle _backtrace;
1248 objArrayOop _head;
1249 objArrayOop _methods;
1250 typeArrayOop _bcis;
1251 int _index;
1252 bool _dirty;
1253 No_Safepoint_Verifier _nsv;
1254
1255 public:
1256
1257 enum {
1258 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
1259 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
1260 trace_next_offset = java_lang_Throwable::trace_next_offset,
1261 trace_size = java_lang_Throwable::trace_size,
1262 trace_chunk_size = java_lang_Throwable::trace_chunk_size
1263 };
1264
1265 // constructor for new backtrace
1266 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _dirty(false) {
1267 expand(CHECK);
1268 _backtrace = _head;
1269 _index = 0;
1270 }
1271
1272 void flush() {
1273 // The following appears to have been an optimization to save from
1274 // doing a barrier for each individual store into the _methods array,
1275 // but rather to do it for the entire array after the series of writes.
1276 // That optimization seems to have been lost when compressed oops was
1277 // implemented. However, the extra card-marks below was left in place,
1278 // but is now redundant because the individual stores into the
1279 // _methods array already execute the barrier code. CR 6918185 has
1280 // been filed so the original code may be restored by deferring the
1281 // barriers until after the entire sequence of stores, thus re-enabling
1282 // the intent of the original optimization. In the meantime the redundant
1283 // card mark below is now disabled.
1284 if (_dirty && _methods != NULL) {
1285 #if 0
1286 BarrierSet* bs = Universe::heap()->barrier_set();
1287 assert(bs->has_write_ref_array_opt(), "Barrier set must have ref array opt");
1288 bs->write_ref_array((HeapWord*)_methods->base(), _methods->length());
1289 #endif
1290 _dirty = false;
1291 }
1292 }
1293
1294 void expand(TRAPS) {
1295 flush();
1296
1297 objArrayHandle old_head(THREAD, _head);
1298 Pause_No_Safepoint_Verifier pnsv(&_nsv);
1299
1300 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
1301 objArrayHandle new_head(THREAD, head);
1302
1303 objArrayOop methods = oopFactory::new_objectArray(trace_chunk_size, CHECK);
1304 objArrayHandle new_methods(THREAD, methods);
1305
1306 typeArrayOop bcis = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1307 typeArrayHandle new_bcis(THREAD, bcis);
1308
1309 if (!old_head.is_null()) {
1310 old_head->obj_at_put(trace_next_offset, new_head());
1311 }
1312 new_head->obj_at_put(trace_methods_offset, new_methods());
1313 new_head->obj_at_put(trace_bcis_offset, new_bcis());
1314
1315 _head = new_head();
1316 _methods = new_methods();
1317 _bcis = new_bcis();
1318 _index = 0;
1319 }
1320
1321 oop backtrace() {
1322 flush();
1323 return _backtrace();
1324 }
1325
1326 inline void push(methodOop method, short bci, TRAPS) {
1327 if (_index >= trace_chunk_size) {
1328 methodHandle mhandle(THREAD, method);
1329 expand(CHECK);
1330 method = mhandle();
1331 }
1332
1333 _methods->obj_at_put(_index, method);
1334 _bcis->ushort_at_put(_index, bci);
1335 _index++;
1336 _dirty = true;
1337 }
1338
1339 methodOop current_method() {
1340 assert(_index >= 0 && _index < trace_chunk_size, "out of range");
1341 return methodOop(_methods->obj_at(_index));
1342 }
1343
1344 jushort current_bci() {
1345 assert(_index >= 0 && _index < trace_chunk_size, "out of range");
1346 return _bcis->ushort_at(_index);
1347 }
1348 };
1349
1350
1351 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, TRAPS) {
1352 if (!StackTraceInThrowable) return;
1353 ResourceMark rm(THREAD);
1354
1355 // Start out by clearing the backtrace for this object, in case the VM
1356 // runs out of memory while allocating the stack trace
1357 set_backtrace(throwable(), NULL);
1358 if (JDK_Version::is_gte_jdk14x_version()) {
1359 // New since 1.4, clear lazily constructed Java level stacktrace if
1360 // refilling occurs
1361 clear_stacktrace(throwable());
1362 }
1363
1364 int max_depth = MaxJavaStackTraceDepth;
1365 JavaThread* thread = (JavaThread*)THREAD;
1366 BacktraceBuilder bt(CHECK);
1367
1368 // Instead of using vframe directly, this version of fill_in_stack_trace
1369 // basically handles everything by hand. This significantly improved the
1370 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
1371 // See bug 6333838 for more details.
1372 // The "ASSERT" here is to verify this method generates the exactly same stack
1373 // trace as utilizing vframe.
1374 #ifdef ASSERT
1375 vframeStream st(thread);
1376 methodHandle st_method(THREAD, st.method());
1377 #endif
1378 int total_count = 0;
1379 RegisterMap map(thread, false);
1380 int decode_offset = 0;
1381 nmethod* nm = NULL;
1382 bool skip_fillInStackTrace_check = false;
1383 bool skip_throwableInit_check = false;
1384
1385 for (frame fr = thread->last_frame(); max_depth != total_count;) {
1386 methodOop method = NULL;
1387 int bci = 0;
1388
1389 // Compiled java method case.
1390 if (decode_offset != 0) {
1391 DebugInfoReadStream stream(nm, decode_offset);
1392 decode_offset = stream.read_int();
1393 method = (methodOop)nm->oop_at(stream.read_int());
1394 bci = stream.read_bci();
1395 } else {
1396 if (fr.is_first_frame()) break;
1397 address pc = fr.pc();
1398 if (fr.is_interpreted_frame()) {
1399 intptr_t bcx = fr.interpreter_frame_bcx();
1400 method = fr.interpreter_frame_method();
1401 bci = fr.is_bci(bcx) ? bcx : method->bci_from((address)bcx);
1402 fr = fr.sender(&map);
1403 } else {
1404 CodeBlob* cb = fr.cb();
1405 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
1406 // but non nmethod
1407 fr = fr.sender(&map);
1408 if (cb == NULL || !cb->is_nmethod()) {
1409 continue;
1410 }
1411 nm = (nmethod*)cb;
1412 if (nm->method()->is_native()) {
1413 method = nm->method();
1414 bci = 0;
1415 } else {
1416 PcDesc* pd = nm->pc_desc_at(pc);
1417 decode_offset = pd->scope_decode_offset();
1418 // if decode_offset is not equal to 0, it will execute the
1419 // "compiled java method case" at the beginning of the loop.
1420 continue;
1421 }
1422 }
1423 }
1424 #ifdef ASSERT
1425 assert(st_method() == method && st.bci() == bci,
1426 "Wrong stack trace");
1427 st.next();
1428 // vframeStream::method isn't GC-safe so store off a copy
1429 // of the methodOop in case we GC.
1430 if (!st.at_end()) {
1431 st_method = st.method();
1432 }
1433 #endif
1434 if (!skip_fillInStackTrace_check) {
1435 // check "fillInStackTrace" only once, so we negate the flag
1436 // after the first time check.
1437 skip_fillInStackTrace_check = true;
1438 if (method->name() == vmSymbols::fillInStackTrace_name()) {
1439 continue;
1440 }
1441 }
1442 // skip <init> methods of the exceptions klass. If there is <init> methods
1443 // that belongs to a superclass of the exception we are going to skipping
1444 // them in stack trace. This is simlar to classic VM.
1445 if (!skip_throwableInit_check) {
1446 if (method->name() == vmSymbols::object_initializer_name() &&
1447 throwable->is_a(method->method_holder())) {
1448 continue;
1449 } else {
1450 // if no "Throwable.init()" method found, we stop checking it next time.
1451 skip_throwableInit_check = true;
1452 }
1453 }
1454 bt.push(method, bci, CHECK);
1455 total_count++;
1456 }
1457
1458 // Put completed stack trace into throwable object
1459 set_backtrace(throwable(), bt.backtrace());
1460 }
1461
1462 void java_lang_Throwable::fill_in_stack_trace(Handle throwable) {
1463 // No-op if stack trace is disabled
1464 if (!StackTraceInThrowable) {
1465 return;
1466 }
1467
1468 // Disable stack traces for some preallocated out of memory errors
1469 if (!Universe::should_fill_in_stack_trace(throwable)) {
1470 return;
1471 }
1472
1473 PRESERVE_EXCEPTION_MARK;
1474
1475 JavaThread* thread = JavaThread::active();
1476 fill_in_stack_trace(throwable, thread);
1477 // ignore exceptions thrown during stack trace filling
1478 CLEAR_PENDING_EXCEPTION;
1479 }
1480
1481 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
1482 // Allocate stack trace - backtrace is created but not filled in
1483
1484 // No-op if stack trace is disabled
1485 if (!StackTraceInThrowable) return;
1486
1487 objArrayOop h_oop = oopFactory::new_objectArray(trace_size, CHECK);
1488 objArrayHandle backtrace (THREAD, h_oop);
1489 objArrayOop m_oop = oopFactory::new_objectArray(trace_chunk_size, CHECK);
1490 objArrayHandle methods (THREAD, m_oop);
1491 typeArrayOop b = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1492 typeArrayHandle bcis(THREAD, b);
1493
1494 // backtrace has space for one chunk (next is NULL)
1495 backtrace->obj_at_put(trace_methods_offset, methods());
1496 backtrace->obj_at_put(trace_bcis_offset, bcis());
1497 set_backtrace(throwable(), backtrace());
1498 }
1499
1500
1501 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
1502 // Fill in stack trace into preallocated backtrace (no GC)
1503
1504 // No-op if stack trace is disabled
1505 if (!StackTraceInThrowable) return;
1506
1507 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
1508
1509 oop backtrace = java_lang_Throwable::backtrace(throwable());
1510 assert(backtrace != NULL, "backtrace not preallocated");
1511
1512 oop m = objArrayOop(backtrace)->obj_at(trace_methods_offset);
1513 objArrayOop methods = objArrayOop(m);
1514 assert(methods != NULL && methods->length() > 0, "method array not preallocated");
1515
1516 oop b = objArrayOop(backtrace)->obj_at(trace_bcis_offset);
1517 typeArrayOop bcis = typeArrayOop(b);
1518 assert(bcis != NULL, "bci array not preallocated");
1519
1520 assert(methods->length() == bcis->length(), "method and bci arrays should match");
1521
1522 JavaThread* thread = JavaThread::current();
1523 ResourceMark rm(thread);
1524 vframeStream st(thread);
1525
1526 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
1527 // methods as preallocated errors aren't created by "java" code.
1528
1529 // fill in as much stack trace as possible
1530 int max_chunks = MIN2(methods->length(), (int)MaxJavaStackTraceDepth);
1531 int chunk_count = 0;
1532
1533 for (;!st.at_end(); st.next()) {
1534 // add element
1535 bcis->ushort_at_put(chunk_count, st.bci());
1536 methods->obj_at_put(chunk_count, st.method());
1537
1538 chunk_count++;
1539
1540 // Bail-out for deep stacks
1541 if (chunk_count >= max_chunks) break;
1542 }
1543 }
1544
1545
1546 int java_lang_Throwable::get_stack_trace_depth(oop throwable, TRAPS) {
1547 if (throwable == NULL) {
1548 THROW_0(vmSymbols::java_lang_NullPointerException());
1549 }
1550 objArrayOop chunk = objArrayOop(backtrace(throwable));
1551 int depth = 0;
1552 if (chunk != NULL) {
1553 // Iterate over chunks and count full ones
1554 while (true) {
1555 objArrayOop next = objArrayOop(chunk->obj_at(trace_next_offset));
1556 if (next == NULL) break;
1557 depth += trace_chunk_size;
1558 chunk = next;
1559 }
1560 assert(chunk != NULL && chunk->obj_at(trace_next_offset) == NULL, "sanity check");
1561 // Count element in remaining partial chunk
1562 objArrayOop methods = objArrayOop(chunk->obj_at(trace_methods_offset));
1563 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1564 assert(methods != NULL && bcis != NULL, "sanity check");
1565 for (int i = 0; i < methods->length(); i++) {
1566 if (methods->obj_at(i) == NULL) break;
1567 depth++;
1568 }
1569 }
1570 return depth;
1571 }
1572
1573
1574 oop java_lang_Throwable::get_stack_trace_element(oop throwable, int index, TRAPS) {
1575 if (throwable == NULL) {
1576 THROW_0(vmSymbols::java_lang_NullPointerException());
1577 }
1578 if (index < 0) {
1579 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1580 }
1581 // Compute how many chunks to skip and index into actual chunk
1582 objArrayOop chunk = objArrayOop(backtrace(throwable));
1583 int skip_chunks = index / trace_chunk_size;
1584 int chunk_index = index % trace_chunk_size;
1585 while (chunk != NULL && skip_chunks > 0) {
1586 chunk = objArrayOop(chunk->obj_at(trace_next_offset));
1587 skip_chunks--;
1588 }
1589 if (chunk == NULL) {
1590 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1591 }
1592 // Get method,bci from chunk
1593 objArrayOop methods = objArrayOop(chunk->obj_at(trace_methods_offset));
1594 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1595 assert(methods != NULL && bcis != NULL, "sanity check");
1596 methodHandle method(THREAD, methodOop(methods->obj_at(chunk_index)));
1597 int bci = bcis->ushort_at(chunk_index);
1598 // Chunk can be partial full
1599 if (method.is_null()) {
1600 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1601 }
1602
1603 oop element = java_lang_StackTraceElement::create(method, bci, CHECK_0);
1604 return element;
1605 }
1606
1607 oop java_lang_StackTraceElement::create(methodHandle method, int bci, TRAPS) {
1608 // SystemDictionary::stackTraceElement_klass() will be null for pre-1.4 JDKs
1609 assert(JDK_Version::is_gte_jdk14x_version(), "should only be called in >= 1.4");
1610
1611 // Allocate java.lang.StackTraceElement instance
1612 klassOop k = SystemDictionary::StackTraceElement_klass();
1613 assert(k != NULL, "must be loaded in 1.4+");
1614 instanceKlassHandle ik (THREAD, k);
1615 if (ik->should_be_initialized()) {
1616 ik->initialize(CHECK_0);
1617 }
1618
1619 Handle element = ik->allocate_instance_handle(CHECK_0);
1620 // Fill in class name
1621 ResourceMark rm(THREAD);
1622 const char* str = instanceKlass::cast(method->method_holder())->external_name();
1623 oop classname = StringTable::intern((char*) str, CHECK_0);
1624 java_lang_StackTraceElement::set_declaringClass(element(), classname);
1625 // Fill in method name
1626 oop methodname = StringTable::intern(method->name(), CHECK_0);
1627 java_lang_StackTraceElement::set_methodName(element(), methodname);
1628 // Fill in source file name
1629 Symbol* source = instanceKlass::cast(method->method_holder())->source_file_name();
1630 oop filename = StringTable::intern(source, CHECK_0);
1631 java_lang_StackTraceElement::set_fileName(element(), filename);
1632 // File in source line number
1633 int line_number;
1634 if (method->is_native()) {
1635 // Negative value different from -1 below, enabling Java code in
1636 // class java.lang.StackTraceElement to distinguish "native" from
1637 // "no LineNumberTable".
1638 line_number = -2;
1639 } else {
1640 // Returns -1 if no LineNumberTable, and otherwise actual line number
1641 line_number = method->line_number_from_bci(bci);
1642 }
1643 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
1644
1645 return element();
1646 }
1647
1648
1649 void java_lang_reflect_AccessibleObject::compute_offsets() {
1650 klassOop k = SystemDictionary::reflect_AccessibleObject_klass();
1651 compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature());
1652 }
1653
1654 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
1655 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1656 return (jboolean) reflect->bool_field(override_offset);
1657 }
1658
1659 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
1660 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1661 reflect->bool_field_put(override_offset, (int) value);
1662 }
1663
1664 void java_lang_reflect_Method::compute_offsets() {
1665 klassOop k = SystemDictionary::reflect_Method_klass();
1666 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
1667 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1668 compute_offset(returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature());
1669 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
1670 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
1671 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
1672 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
1673 // The generic signature and annotations fields are only present in 1.5
1674 signature_offset = -1;
1675 annotations_offset = -1;
1676 parameter_annotations_offset = -1;
1677 annotation_default_offset = -1;
1678 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
1679 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
1680 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
1681 compute_optional_offset(annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature());
1682 }
1683
1684 Handle java_lang_reflect_Method::create(TRAPS) {
1685 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1686 klassOop klass = SystemDictionary::reflect_Method_klass();
1687 // This class is eagerly initialized during VM initialization, since we keep a refence
1688 // to one of the methods
1689 assert(instanceKlass::cast(klass)->is_initialized(), "must be initialized");
1690 return instanceKlass::cast(klass)->allocate_instance_handle(CHECK_NH);
1691 }
1692
1693 oop java_lang_reflect_Method::clazz(oop reflect) {
1694 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1695 return reflect->obj_field(clazz_offset);
1696 }
1697
1698 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
1699 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1700 reflect->obj_field_put(clazz_offset, value);
1701 }
1702
1703 int java_lang_reflect_Method::slot(oop reflect) {
1704 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1705 return reflect->int_field(slot_offset);
1706 }
1707
1708 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
1709 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1710 reflect->int_field_put(slot_offset, value);
1711 }
1712
1713 oop java_lang_reflect_Method::name(oop method) {
1714 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1715 return method->obj_field(name_offset);
1716 }
1717
1718 void java_lang_reflect_Method::set_name(oop method, oop value) {
1719 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1720 method->obj_field_put(name_offset, value);
1721 }
1722
1723 oop java_lang_reflect_Method::return_type(oop method) {
1724 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1725 return method->obj_field(returnType_offset);
1726 }
1727
1728 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
1729 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1730 method->obj_field_put(returnType_offset, value);
1731 }
1732
1733 oop java_lang_reflect_Method::parameter_types(oop method) {
1734 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1735 return method->obj_field(parameterTypes_offset);
1736 }
1737
1738 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
1739 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1740 method->obj_field_put(parameterTypes_offset, value);
1741 }
1742
1743 oop java_lang_reflect_Method::exception_types(oop method) {
1744 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1745 return method->obj_field(exceptionTypes_offset);
1746 }
1747
1748 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
1749 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1750 method->obj_field_put(exceptionTypes_offset, value);
1751 }
1752
1753 int java_lang_reflect_Method::modifiers(oop method) {
1754 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1755 return method->int_field(modifiers_offset);
1756 }
1757
1758 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
1759 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1760 method->int_field_put(modifiers_offset, value);
1761 }
1762
1763 bool java_lang_reflect_Method::has_signature_field() {
1764 return (signature_offset >= 0);
1765 }
1766
1767 oop java_lang_reflect_Method::signature(oop method) {
1768 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1769 assert(has_signature_field(), "signature field must be present");
1770 return method->obj_field(signature_offset);
1771 }
1772
1773 void java_lang_reflect_Method::set_signature(oop method, oop value) {
1774 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1775 assert(has_signature_field(), "signature field must be present");
1776 method->obj_field_put(signature_offset, value);
1777 }
1778
1779 bool java_lang_reflect_Method::has_annotations_field() {
1780 return (annotations_offset >= 0);
1781 }
1782
1783 oop java_lang_reflect_Method::annotations(oop method) {
1784 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1785 assert(has_annotations_field(), "annotations field must be present");
1786 return method->obj_field(annotations_offset);
1787 }
1788
1789 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
1790 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1791 assert(has_annotations_field(), "annotations field must be present");
1792 method->obj_field_put(annotations_offset, value);
1793 }
1794
1795 bool java_lang_reflect_Method::has_parameter_annotations_field() {
1796 return (parameter_annotations_offset >= 0);
1797 }
1798
1799 oop java_lang_reflect_Method::parameter_annotations(oop method) {
1800 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1801 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
1802 return method->obj_field(parameter_annotations_offset);
1803 }
1804
1805 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
1806 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1807 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
1808 method->obj_field_put(parameter_annotations_offset, value);
1809 }
1810
1811 bool java_lang_reflect_Method::has_annotation_default_field() {
1812 return (annotation_default_offset >= 0);
1813 }
1814
1815 oop java_lang_reflect_Method::annotation_default(oop method) {
1816 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1817 assert(has_annotation_default_field(), "annotation default field must be present");
1818 return method->obj_field(annotation_default_offset);
1819 }
1820
1821 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
1822 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1823 assert(has_annotation_default_field(), "annotation default field must be present");
1824 method->obj_field_put(annotation_default_offset, value);
1825 }
1826
1827 void java_lang_reflect_Constructor::compute_offsets() {
1828 klassOop k = SystemDictionary::reflect_Constructor_klass();
1829 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
1830 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
1831 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
1832 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
1833 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
1834 // The generic signature and annotations fields are only present in 1.5
1835 signature_offset = -1;
1836 annotations_offset = -1;
1837 parameter_annotations_offset = -1;
1838 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
1839 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
1840 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
1841 }
1842
1843 Handle java_lang_reflect_Constructor::create(TRAPS) {
1844 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1845 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
1846 klassOop k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
1847 instanceKlassHandle klass (THREAD, k);
1848 // Ensure it is initialized
1849 klass->initialize(CHECK_NH);
1850 return klass->allocate_instance_handle(CHECK_NH);
1851 }
1852
1853 oop java_lang_reflect_Constructor::clazz(oop reflect) {
1854 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1855 return reflect->obj_field(clazz_offset);
1856 }
1857
1858 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
1859 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1860 reflect->obj_field_put(clazz_offset, value);
1861 }
1862
1863 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
1864 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1865 return constructor->obj_field(parameterTypes_offset);
1866 }
1867
1868 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
1869 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1870 constructor->obj_field_put(parameterTypes_offset, value);
1871 }
1872
1873 oop java_lang_reflect_Constructor::exception_types(oop constructor) {
1874 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1875 return constructor->obj_field(exceptionTypes_offset);
1876 }
1877
1878 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
1879 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1880 constructor->obj_field_put(exceptionTypes_offset, value);
1881 }
1882
1883 int java_lang_reflect_Constructor::slot(oop reflect) {
1884 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1885 return reflect->int_field(slot_offset);
1886 }
1887
1888 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
1889 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1890 reflect->int_field_put(slot_offset, value);
1891 }
1892
1893 int java_lang_reflect_Constructor::modifiers(oop constructor) {
1894 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1895 return constructor->int_field(modifiers_offset);
1896 }
1897
1898 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
1899 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1900 constructor->int_field_put(modifiers_offset, value);
1901 }
1902
1903 bool java_lang_reflect_Constructor::has_signature_field() {
1904 return (signature_offset >= 0);
1905 }
1906
1907 oop java_lang_reflect_Constructor::signature(oop constructor) {
1908 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1909 assert(has_signature_field(), "signature field must be present");
1910 return constructor->obj_field(signature_offset);
1911 }
1912
1913 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
1914 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1915 assert(has_signature_field(), "signature field must be present");
1916 constructor->obj_field_put(signature_offset, value);
1917 }
1918
1919 bool java_lang_reflect_Constructor::has_annotations_field() {
1920 return (annotations_offset >= 0);
1921 }
1922
1923 oop java_lang_reflect_Constructor::annotations(oop constructor) {
1924 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1925 assert(has_annotations_field(), "annotations field must be present");
1926 return constructor->obj_field(annotations_offset);
1927 }
1928
1929 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
1930 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1931 assert(has_annotations_field(), "annotations field must be present");
1932 constructor->obj_field_put(annotations_offset, value);
1933 }
1934
1935 bool java_lang_reflect_Constructor::has_parameter_annotations_field() {
1936 return (parameter_annotations_offset >= 0);
1937 }
1938
1939 oop java_lang_reflect_Constructor::parameter_annotations(oop method) {
1940 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1941 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
1942 return method->obj_field(parameter_annotations_offset);
1943 }
1944
1945 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
1946 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1947 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
1948 method->obj_field_put(parameter_annotations_offset, value);
1949 }
1950
1951 void java_lang_reflect_Field::compute_offsets() {
1952 klassOop k = SystemDictionary::reflect_Field_klass();
1953 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
1954 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1955 compute_offset(type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature());
1956 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
1957 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
1958 // The generic signature and annotations fields are only present in 1.5
1959 signature_offset = -1;
1960 annotations_offset = -1;
1961 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
1962 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
1963 }
1964
1965 Handle java_lang_reflect_Field::create(TRAPS) {
1966 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1967 Symbol* name = vmSymbols::java_lang_reflect_Field();
1968 klassOop k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
1969 instanceKlassHandle klass (THREAD, k);
1970 // Ensure it is initialized
1971 klass->initialize(CHECK_NH);
1972 return klass->allocate_instance_handle(CHECK_NH);
1973 }
1974
1975 oop java_lang_reflect_Field::clazz(oop reflect) {
1976 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1977 return reflect->obj_field(clazz_offset);
1978 }
1979
1980 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
1981 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1982 reflect->obj_field_put(clazz_offset, value);
1983 }
1984
1985 oop java_lang_reflect_Field::name(oop field) {
1986 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1987 return field->obj_field(name_offset);
1988 }
1989
1990 void java_lang_reflect_Field::set_name(oop field, oop value) {
1991 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1992 field->obj_field_put(name_offset, value);
1993 }
1994
1995 oop java_lang_reflect_Field::type(oop field) {
1996 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1997 return field->obj_field(type_offset);
1998 }
1999
2000 void java_lang_reflect_Field::set_type(oop field, oop value) {
2001 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2002 field->obj_field_put(type_offset, value);
2003 }
2004
2005 int java_lang_reflect_Field::slot(oop reflect) {
2006 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2007 return reflect->int_field(slot_offset);
2008 }
2009
2010 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
2011 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2012 reflect->int_field_put(slot_offset, value);
2013 }
2014
2015 int java_lang_reflect_Field::modifiers(oop field) {
2016 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2017 return field->int_field(modifiers_offset);
2018 }
2019
2020 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
2021 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2022 field->int_field_put(modifiers_offset, value);
2023 }
2024
2025 bool java_lang_reflect_Field::has_signature_field() {
2026 return (signature_offset >= 0);
2027 }
2028
2029 oop java_lang_reflect_Field::signature(oop field) {
2030 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2031 assert(has_signature_field(), "signature field must be present");
2032 return field->obj_field(signature_offset);
2033 }
2034
2035 void java_lang_reflect_Field::set_signature(oop field, oop value) {
2036 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2037 assert(has_signature_field(), "signature field must be present");
2038 field->obj_field_put(signature_offset, value);
2039 }
2040
2041 bool java_lang_reflect_Field::has_annotations_field() {
2042 return (annotations_offset >= 0);
2043 }
2044
2045 oop java_lang_reflect_Field::annotations(oop field) {
2046 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2047 assert(has_annotations_field(), "annotations field must be present");
2048 return field->obj_field(annotations_offset);
2049 }
2050
2051 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
2052 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2053 assert(has_annotations_field(), "annotations field must be present");
2054 field->obj_field_put(annotations_offset, value);
2055 }
2056
2057
2058 void sun_reflect_ConstantPool::compute_offsets() {
2059 klassOop k = SystemDictionary::reflect_ConstantPool_klass();
2060 // This null test can be removed post beta
2061 if (k != NULL) {
2062 compute_offset(_cp_oop_offset, k, vmSymbols::constantPoolOop_name(), vmSymbols::object_signature());
2063 }
2064 }
2065
2066
2067 Handle sun_reflect_ConstantPool::create(TRAPS) {
2068 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2069 klassOop k = SystemDictionary::reflect_ConstantPool_klass();
2070 instanceKlassHandle klass (THREAD, k);
2071 // Ensure it is initialized
2072 klass->initialize(CHECK_NH);
2073 return klass->allocate_instance_handle(CHECK_NH);
2074 }
2075
2076
2077 oop sun_reflect_ConstantPool::cp_oop(oop reflect) {
2078 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2079 return reflect->obj_field(_cp_oop_offset);
2080 }
2081
2082
2083 void sun_reflect_ConstantPool::set_cp_oop(oop reflect, oop value) {
2084 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2085 reflect->obj_field_put(_cp_oop_offset, value);
2086 }
2087
2088 void sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
2089 klassOop k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass();
2090 // This null test can be removed post beta
2091 if (k != NULL) {
2092 compute_offset(_base_offset, k,
2093 vmSymbols::base_name(), vmSymbols::object_signature());
2094 }
2095 }
2096
2097 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
2098 klassOop k = SystemDictionary::box_klass(type);
2099 if (k == NULL) return NULL;
2100 instanceKlassHandle h (THREAD, k);
2101 if (!h->is_initialized()) h->initialize(CHECK_0);
2102 return h->allocate_instance(THREAD);
2103 }
2104
2105
2106 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
2107 oop box = initialize_and_allocate(type, CHECK_0);
2108 if (box == NULL) return NULL;
2109 switch (type) {
2110 case T_BOOLEAN:
2111 box->bool_field_put(value_offset, value->z);
2112 break;
2113 case T_CHAR:
2114 box->char_field_put(value_offset, value->c);
2115 break;
2116 case T_FLOAT:
2117 box->float_field_put(value_offset, value->f);
2118 break;
2119 case T_DOUBLE:
2120 box->double_field_put(long_value_offset, value->d);
2121 break;
2122 case T_BYTE:
2123 box->byte_field_put(value_offset, value->b);
2124 break;
2125 case T_SHORT:
2126 box->short_field_put(value_offset, value->s);
2127 break;
2128 case T_INT:
2129 box->int_field_put(value_offset, value->i);
2130 break;
2131 case T_LONG:
2132 box->long_field_put(long_value_offset, value->j);
2133 break;
2134 default:
2135 return NULL;
2136 }
2137 return box;
2138 }
2139
2140
2141 BasicType java_lang_boxing_object::basic_type(oop box) {
2142 if (box == NULL) return T_ILLEGAL;
2143 BasicType type = SystemDictionary::box_klass_type(box->klass());
2144 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
2145 return T_ILLEGAL;
2146 return type;
2147 }
2148
2149
2150 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
2151 BasicType type = SystemDictionary::box_klass_type(box->klass());
2152 switch (type) {
2153 case T_BOOLEAN:
2154 value->z = box->bool_field(value_offset);
2155 break;
2156 case T_CHAR:
2157 value->c = box->char_field(value_offset);
2158 break;
2159 case T_FLOAT:
2160 value->f = box->float_field(value_offset);
2161 break;
2162 case T_DOUBLE:
2163 value->d = box->double_field(long_value_offset);
2164 break;
2165 case T_BYTE:
2166 value->b = box->byte_field(value_offset);
2167 break;
2168 case T_SHORT:
2169 value->s = box->short_field(value_offset);
2170 break;
2171 case T_INT:
2172 value->i = box->int_field(value_offset);
2173 break;
2174 case T_LONG:
2175 value->j = box->long_field(long_value_offset);
2176 break;
2177 default:
2178 return T_ILLEGAL;
2179 } // end switch
2180 return type;
2181 }
2182
2183
2184 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
2185 BasicType type = SystemDictionary::box_klass_type(box->klass());
2186 switch (type) {
2187 case T_BOOLEAN:
2188 box->bool_field_put(value_offset, value->z);
2189 break;
2190 case T_CHAR:
2191 box->char_field_put(value_offset, value->c);
2192 break;
2193 case T_FLOAT:
2194 box->float_field_put(value_offset, value->f);
2195 break;
2196 case T_DOUBLE:
2197 box->double_field_put(long_value_offset, value->d);
2198 break;
2199 case T_BYTE:
2200 box->byte_field_put(value_offset, value->b);
2201 break;
2202 case T_SHORT:
2203 box->short_field_put(value_offset, value->s);
2204 break;
2205 case T_INT:
2206 box->int_field_put(value_offset, value->i);
2207 break;
2208 case T_LONG:
2209 box->long_field_put(long_value_offset, value->j);
2210 break;
2211 default:
2212 return T_ILLEGAL;
2213 } // end switch
2214 return type;
2215 }
2216
2217
2218 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
2219 switch (type) {
2220 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
2221 case T_CHAR: st->print("%d", value->c); break;
2222 case T_BYTE: st->print("%d", value->b); break;
2223 case T_SHORT: st->print("%d", value->s); break;
2224 case T_INT: st->print("%d", value->i); break;
2225 case T_LONG: st->print(INT64_FORMAT, value->j); break;
2226 case T_FLOAT: st->print("%f", value->f); break;
2227 case T_DOUBLE: st->print("%lf", value->d); break;
2228 default: st->print("type %d?", type); break;
2229 }
2230 }
2231
2232
2233 // Support for java_lang_ref_Reference
2234 oop java_lang_ref_Reference::pending_list_lock() {
2235 instanceKlass* ik = instanceKlass::cast(SystemDictionary::Reference_klass());
2236 address addr = ik->static_field_addr(static_lock_offset);
2237 if (UseCompressedOops) {
2238 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
2239 } else {
2240 return oopDesc::load_decode_heap_oop((oop*)addr);
2241 }
2242 }
2243
2244 HeapWord *java_lang_ref_Reference::pending_list_addr() {
2245 instanceKlass* ik = instanceKlass::cast(SystemDictionary::Reference_klass());
2246 address addr = ik->static_field_addr(static_pending_offset);
2247 // XXX This might not be HeapWord aligned, almost rather be char *.
2248 return (HeapWord*)addr;
2249 }
2250
2251 oop java_lang_ref_Reference::pending_list() {
2252 char *addr = (char *)pending_list_addr();
2253 if (UseCompressedOops) {
2254 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
2255 } else {
2256 return oopDesc::load_decode_heap_oop((oop*)addr);
2257 }
2258 }
2259
2260
2261 // Support for java_lang_ref_SoftReference
2262
2263 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
2264 return ref->long_field(timestamp_offset);
2265 }
2266
2267 jlong java_lang_ref_SoftReference::clock() {
2268 instanceKlass* ik = instanceKlass::cast(SystemDictionary::SoftReference_klass());
2269 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
2270 return *offset;
2271 }
2272
2273 void java_lang_ref_SoftReference::set_clock(jlong value) {
2274 instanceKlass* ik = instanceKlass::cast(SystemDictionary::SoftReference_klass());
2275 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
2276 *offset = value;
2277 }
2278
2279
2280 // Support for java_dyn_MethodHandle
2281
2282 int java_dyn_MethodHandle::_type_offset;
2283 int java_dyn_MethodHandle::_vmtarget_offset;
2284 int java_dyn_MethodHandle::_vmentry_offset;
2285 int java_dyn_MethodHandle::_vmslots_offset;
2286
2287 int sun_dyn_MemberName::_clazz_offset;
2288 int sun_dyn_MemberName::_name_offset;
2289 int sun_dyn_MemberName::_type_offset;
2290 int sun_dyn_MemberName::_flags_offset;
2291 int sun_dyn_MemberName::_vmtarget_offset;
2292 int sun_dyn_MemberName::_vmindex_offset;
2293
2294 int sun_dyn_DirectMethodHandle::_vmindex_offset;
2295
2296 int sun_dyn_BoundMethodHandle::_argument_offset;
2297 int sun_dyn_BoundMethodHandle::_vmargslot_offset;
2298
2299 int sun_dyn_AdapterMethodHandle::_conversion_offset;
2300
2301 void java_dyn_MethodHandle::compute_offsets() {
2302 klassOop k = SystemDictionary::MethodHandle_klass();
2303 if (k != NULL && EnableMethodHandles) {
2304 compute_offset(_type_offset, k, vmSymbols::type_name(), vmSymbols::java_dyn_MethodType_signature(), true);
2305 compute_offset(_vmtarget_offset, k, vmSymbols::vmtarget_name(), vmSymbols::object_signature(), true);
2306 compute_offset(_vmentry_offset, k, vmSymbols::vmentry_name(), vmSymbols::machine_word_signature(), true);
2307
2308 // Note: MH.vmslots (if it is present) is a hoisted copy of MH.type.form.vmslots.
2309 // It is optional pending experiments to keep or toss.
2310 compute_optional_offset(_vmslots_offset, k, vmSymbols::vmslots_name(), vmSymbols::int_signature(), true);
2311 }
2312 }
2313
2314 void sun_dyn_MemberName::compute_offsets() {
2315 klassOop k = SystemDictionary::MemberName_klass();
2316 if (k != NULL && EnableMethodHandles) {
2317 compute_offset(_clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
2318 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2319 compute_offset(_type_offset, k, vmSymbols::type_name(), vmSymbols::object_signature());
2320 compute_offset(_flags_offset, k, vmSymbols::flags_name(), vmSymbols::int_signature());
2321 compute_offset(_vmtarget_offset, k, vmSymbols::vmtarget_name(), vmSymbols::object_signature());
2322 compute_offset(_vmindex_offset, k, vmSymbols::vmindex_name(), vmSymbols::int_signature());
2323 }
2324 }
2325
2326 void sun_dyn_DirectMethodHandle::compute_offsets() {
2327 klassOop k = SystemDictionary::DirectMethodHandle_klass();
2328 if (k != NULL && EnableMethodHandles) {
2329 compute_offset(_vmindex_offset, k, vmSymbols::vmindex_name(), vmSymbols::int_signature(), true);
2330 }
2331 }
2332
2333 void sun_dyn_BoundMethodHandle::compute_offsets() {
2334 klassOop k = SystemDictionary::BoundMethodHandle_klass();
2335 if (k != NULL && EnableMethodHandles) {
2336 compute_offset(_vmargslot_offset, k, vmSymbols::vmargslot_name(), vmSymbols::int_signature(), true);
2337 compute_offset(_argument_offset, k, vmSymbols::argument_name(), vmSymbols::object_signature(), true);
2338 }
2339 }
2340
2341 void sun_dyn_AdapterMethodHandle::compute_offsets() {
2342 klassOop k = SystemDictionary::AdapterMethodHandle_klass();
2343 if (k != NULL && EnableMethodHandles) {
2344 compute_offset(_conversion_offset, k, vmSymbols::conversion_name(), vmSymbols::int_signature(), true);
2345 }
2346 }
2347
2348 oop java_dyn_MethodHandle::type(oop mh) {
2349 return mh->obj_field(_type_offset);
2350 }
2351
2352 void java_dyn_MethodHandle::set_type(oop mh, oop mtype) {
2353 mh->obj_field_put(_type_offset, mtype);
2354 }
2355
2356 int java_dyn_MethodHandle::vmslots(oop mh) {
2357 int vmslots_offset = _vmslots_offset;
2358 if (vmslots_offset != 0) {
2359 #ifdef ASSERT
2360 int x = mh->int_field(vmslots_offset);
2361 int y = compute_vmslots(mh);
2362 assert(x == y, "correct hoisted value");
2363 #endif
2364 return mh->int_field(vmslots_offset);
2365 } else {
2366 return compute_vmslots(mh);
2367 }
2368 }
2369
2370 // if MH.vmslots exists, hoist into it the value of type.form.vmslots
2371 void java_dyn_MethodHandle::init_vmslots(oop mh) {
2372 int vmslots_offset = _vmslots_offset;
2373 if (vmslots_offset != 0) {
2374 mh->int_field_put(vmslots_offset, compute_vmslots(mh));
2375 }
2376 }
2377
2378 // fetch type.form.vmslots, which is the number of JVM stack slots
2379 // required to carry the arguments of this MH
2380 int java_dyn_MethodHandle::compute_vmslots(oop mh) {
2381 oop mtype = type(mh);
2382 if (mtype == NULL) return 0; // Java code would get NPE
2383 oop form = java_dyn_MethodType::form(mtype);
2384 if (form == NULL) return 0; // Java code would get NPE
2385 return java_dyn_MethodTypeForm::vmslots(form);
2386 }
2387
2388 // fetch the low-level entry point for this mh
2389 MethodHandleEntry* java_dyn_MethodHandle::vmentry(oop mh) {
2390 return (MethodHandleEntry*) mh->address_field(_vmentry_offset);
2391 }
2392
2393 void java_dyn_MethodHandle::set_vmentry(oop mh, MethodHandleEntry* me) {
2394 assert(_vmentry_offset != 0, "must be present");
2395
2396 // This is always the final step that initializes a valid method handle:
2397 mh->release_address_field_put(_vmentry_offset, (address) me);
2398
2399 // There should be enough memory barriers on exit from native methods
2400 // to ensure that the MH is fully initialized to all threads before
2401 // Java code can publish it in global data structures.
2402 // But just in case, we use release_address_field_put.
2403 }
2404
2405 /// MemberName accessors
2406
2407 oop sun_dyn_MemberName::clazz(oop mname) {
2408 assert(is_instance(mname), "wrong type");
2409 return mname->obj_field(_clazz_offset);
2410 }
2411
2412 void sun_dyn_MemberName::set_clazz(oop mname, oop clazz) {
2413 assert(is_instance(mname), "wrong type");
2414 mname->obj_field_put(_clazz_offset, clazz);
2415 }
2416
2417 oop sun_dyn_MemberName::name(oop mname) {
2418 assert(is_instance(mname), "wrong type");
2419 return mname->obj_field(_name_offset);
2420 }
2421
2422 void sun_dyn_MemberName::set_name(oop mname, oop name) {
2423 assert(is_instance(mname), "wrong type");
2424 mname->obj_field_put(_name_offset, name);
2425 }
2426
2427 oop sun_dyn_MemberName::type(oop mname) {
2428 assert(is_instance(mname), "wrong type");
2429 return mname->obj_field(_type_offset);
2430 }
2431
2432 void sun_dyn_MemberName::set_type(oop mname, oop type) {
2433 assert(is_instance(mname), "wrong type");
2434 mname->obj_field_put(_type_offset, type);
2435 }
2436
2437 int sun_dyn_MemberName::flags(oop mname) {
2438 assert(is_instance(mname), "wrong type");
2439 return mname->int_field(_flags_offset);
2440 }
2441
2442 void sun_dyn_MemberName::set_flags(oop mname, int flags) {
2443 assert(is_instance(mname), "wrong type");
2444 mname->int_field_put(_flags_offset, flags);
2445 }
2446
2447 oop sun_dyn_MemberName::vmtarget(oop mname) {
2448 assert(is_instance(mname), "wrong type");
2449 return mname->obj_field(_vmtarget_offset);
2450 }
2451
2452 void sun_dyn_MemberName::set_vmtarget(oop mname, oop ref) {
2453 assert(is_instance(mname), "wrong type");
2454 mname->obj_field_put(_vmtarget_offset, ref);
2455 }
2456
2457 int sun_dyn_MemberName::vmindex(oop mname) {
2458 assert(is_instance(mname), "wrong type");
2459 return mname->int_field(_vmindex_offset);
2460 }
2461
2462 void sun_dyn_MemberName::set_vmindex(oop mname, int index) {
2463 assert(is_instance(mname), "wrong type");
2464 mname->int_field_put(_vmindex_offset, index);
2465 }
2466
2467 oop java_dyn_MethodHandle::vmtarget(oop mh) {
2468 assert(is_instance(mh), "MH only");
2469 return mh->obj_field(_vmtarget_offset);
2470 }
2471
2472 void java_dyn_MethodHandle::set_vmtarget(oop mh, oop ref) {
2473 assert(is_instance(mh), "MH only");
2474 mh->obj_field_put(_vmtarget_offset, ref);
2475 }
2476
2477 int sun_dyn_DirectMethodHandle::vmindex(oop mh) {
2478 assert(is_instance(mh), "DMH only");
2479 return mh->int_field(_vmindex_offset);
2480 }
2481
2482 void sun_dyn_DirectMethodHandle::set_vmindex(oop mh, int index) {
2483 assert(is_instance(mh), "DMH only");
2484 mh->int_field_put(_vmindex_offset, index);
2485 }
2486
2487 int sun_dyn_BoundMethodHandle::vmargslot(oop mh) {
2488 assert(is_instance(mh), "BMH only");
2489 return mh->int_field(_vmargslot_offset);
2490 }
2491
2492 oop sun_dyn_BoundMethodHandle::argument(oop mh) {
2493 assert(is_instance(mh), "BMH only");
2494 return mh->obj_field(_argument_offset);
2495 }
2496
2497 int sun_dyn_AdapterMethodHandle::conversion(oop mh) {
2498 assert(is_instance(mh), "AMH only");
2499 return mh->int_field(_conversion_offset);
2500 }
2501
2502 void sun_dyn_AdapterMethodHandle::set_conversion(oop mh, int conv) {
2503 assert(is_instance(mh), "AMH only");
2504 mh->int_field_put(_conversion_offset, conv);
2505 }
2506
2507
2508 // Support for java_dyn_MethodType
2509
2510 int java_dyn_MethodType::_rtype_offset;
2511 int java_dyn_MethodType::_ptypes_offset;
2512 int java_dyn_MethodType::_form_offset;
2513
2514 void java_dyn_MethodType::compute_offsets() {
2515 klassOop k = SystemDictionary::MethodType_klass();
2516 if (k != NULL) {
2517 compute_offset(_rtype_offset, k, vmSymbols::rtype_name(), vmSymbols::class_signature());
2518 compute_offset(_ptypes_offset, k, vmSymbols::ptypes_name(), vmSymbols::class_array_signature());
2519 compute_offset(_form_offset, k, vmSymbols::form_name(), vmSymbols::java_dyn_MethodTypeForm_signature());
2520 }
2521 }
2522
2523 void java_dyn_MethodType::print_signature(oop mt, outputStream* st) {
2524 st->print("(");
2525 objArrayOop pts = ptypes(mt);
2526 for (int i = 0, limit = pts->length(); i < limit; i++) {
2527 java_lang_Class::print_signature(pts->obj_at(i), st);
2528 }
2529 st->print(")");
2530 java_lang_Class::print_signature(rtype(mt), st);
2531 }
2532
2533 Symbol* java_dyn_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) {
2534 ResourceMark rm;
2535 stringStream buffer(128);
2536 print_signature(mt, &buffer);
2537 const char* sigstr = buffer.base();
2538 int siglen = (int) buffer.size();
2539 Symbol *name;
2540 if (!intern_if_not_found) {
2541 name = SymbolTable::probe(sigstr, siglen);
2542 } else {
2543 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
2544 }
2545 return name;
2546 }
2547
2548 oop java_dyn_MethodType::rtype(oop mt) {
2549 assert(is_instance(mt), "must be a MethodType");
2550 return mt->obj_field(_rtype_offset);
2551 }
2552
2553 objArrayOop java_dyn_MethodType::ptypes(oop mt) {
2554 assert(is_instance(mt), "must be a MethodType");
2555 return (objArrayOop) mt->obj_field(_ptypes_offset);
2556 }
2557
2558 oop java_dyn_MethodType::form(oop mt) {
2559 assert(is_instance(mt), "must be a MethodType");
2560 return mt->obj_field(_form_offset);
2561 }
2562
2563 oop java_dyn_MethodType::ptype(oop mt, int idx) {
2564 return ptypes(mt)->obj_at(idx);
2565 }
2566
2567 int java_dyn_MethodType::ptype_count(oop mt) {
2568 return ptypes(mt)->length();
2569 }
2570
2571
2572
2573 // Support for java_dyn_MethodTypeForm
2574
2575 int java_dyn_MethodTypeForm::_vmslots_offset;
2576 int java_dyn_MethodTypeForm::_erasedType_offset;
2577 int java_dyn_MethodTypeForm::_genericInvoker_offset;
2578
2579 void java_dyn_MethodTypeForm::compute_offsets() {
2580 klassOop k = SystemDictionary::MethodTypeForm_klass();
2581 if (k != NULL) {
2582 compute_optional_offset(_vmslots_offset, k, vmSymbols::vmslots_name(), vmSymbols::int_signature(), true);
2583 compute_optional_offset(_erasedType_offset, k, vmSymbols::erasedType_name(), vmSymbols::java_dyn_MethodType_signature(), true);
2584 compute_optional_offset(_genericInvoker_offset, k, vmSymbols::genericInvoker_name(), vmSymbols::java_dyn_MethodHandle_signature(), true);
2585 if (_genericInvoker_offset == 0) _genericInvoker_offset = -1; // set to explicit "empty" value
2586 }
2587 }
2588
2589 int java_dyn_MethodTypeForm::vmslots(oop mtform) {
2590 assert(mtform->klass() == SystemDictionary::MethodTypeForm_klass(), "MTForm only");
2591 return mtform->int_field(_vmslots_offset);
2592 }
2593
2594 oop java_dyn_MethodTypeForm::erasedType(oop mtform) {
2595 assert(mtform->klass() == SystemDictionary::MethodTypeForm_klass(), "MTForm only");
2596 return mtform->obj_field(_erasedType_offset);
2597 }
2598
2599 oop java_dyn_MethodTypeForm::genericInvoker(oop mtform) {
2600 assert(mtform->klass() == SystemDictionary::MethodTypeForm_klass(), "MTForm only");
2601 return mtform->obj_field(_genericInvoker_offset);
2602 }
2603
2604
2605 // Support for java_dyn_CallSite
2606
2607 int java_dyn_CallSite::_target_offset;
2608 int java_dyn_CallSite::_caller_method_offset;
2609 int java_dyn_CallSite::_caller_bci_offset;
2610
2611 void java_dyn_CallSite::compute_offsets() {
2612 if (!EnableInvokeDynamic) return;
2613 klassOop k = SystemDictionary::CallSite_klass();
2614 if (k != NULL) {
2615 compute_offset(_target_offset, k, vmSymbols::target_name(), vmSymbols::java_dyn_MethodHandle_signature());
2616 compute_offset(_caller_method_offset, k, vmSymbols::vmmethod_name(), vmSymbols::sun_dyn_MemberName_signature());
2617 compute_offset(_caller_bci_offset, k, vmSymbols::vmindex_name(), vmSymbols::int_signature());
2618 }
2619 }
2620
2621 oop java_dyn_CallSite::target(oop site) {
2622 return site->obj_field(_target_offset);
2623 }
2624
2625 void java_dyn_CallSite::set_target(oop site, oop target) {
2626 site->obj_field_put(_target_offset, target);
2627 }
2628
2629 oop java_dyn_CallSite::caller_method(oop site) {
2630 return site->obj_field(_caller_method_offset);
2631 }
2632
2633 void java_dyn_CallSite::set_caller_method(oop site, oop ref) {
2634 site->obj_field_put(_caller_method_offset, ref);
2635 }
2636
2637 jint java_dyn_CallSite::caller_bci(oop site) {
2638 return site->int_field(_caller_bci_offset);
2639 }
2640
2641 void java_dyn_CallSite::set_caller_bci(oop site, jint bci) {
2642 site->int_field_put(_caller_bci_offset, bci);
2643 }
2644
2645
2646 // Support for java_security_AccessControlContext
2647
2648 int java_security_AccessControlContext::_context_offset = 0;
2649 int java_security_AccessControlContext::_privilegedContext_offset = 0;
2650 int java_security_AccessControlContext::_isPrivileged_offset = 0;
2651
2652 void java_security_AccessControlContext::compute_offsets() {
2653 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
2654 fieldDescriptor fd;
2655 instanceKlass* ik = instanceKlass::cast(SystemDictionary::AccessControlContext_klass());
2656
2657 if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) {
2658 fatal("Invalid layout of java.security.AccessControlContext");
2659 }
2660 _context_offset = fd.offset();
2661
2662 if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) {
2663 fatal("Invalid layout of java.security.AccessControlContext");
2664 }
2665 _privilegedContext_offset = fd.offset();
2666
2667 if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) {
2668 fatal("Invalid layout of java.security.AccessControlContext");
2669 }
2670 _isPrivileged_offset = fd.offset();
2671 }
2672
2673
2674 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
2675 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
2676 // Ensure klass is initialized
2677 instanceKlass::cast(SystemDictionary::AccessControlContext_klass())->initialize(CHECK_0);
2678 // Allocate result
2679 oop result = instanceKlass::cast(SystemDictionary::AccessControlContext_klass())->allocate_instance(CHECK_0);
2680 // Fill in values
2681 result->obj_field_put(_context_offset, context());
2682 result->obj_field_put(_privilegedContext_offset, privileged_context());
2683 result->bool_field_put(_isPrivileged_offset, isPrivileged);
2684 return result;
2685 }
2686
2687
2688 // Support for java_lang_ClassLoader
2689
2690 oop java_lang_ClassLoader::parent(oop loader) {
2691 assert(loader->is_oop(), "loader must be oop");
2692 return loader->obj_field(parent_offset);
2693 }
2694
2695
2696 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
2697 // Fix for 4474172; see evaluation for more details
2698 loader = non_reflection_class_loader(loader);
2699
2700 oop cl = SystemDictionary::java_system_loader();
2701 while(cl != NULL) {
2702 if (cl == loader) return true;
2703 cl = parent(cl);
2704 }
2705 return false;
2706 }
2707
2708 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
2709 if (loader != NULL) {
2710 // See whether this is one of the class loaders associated with
2711 // the generated bytecodes for reflection, and if so, "magically"
2712 // delegate to its parent to prevent class loading from occurring
2713 // in places where applications using reflection didn't expect it.
2714 klassOop delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass();
2715 // This might be null in non-1.4 JDKs
2716 if (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)) {
2717 return parent(loader);
2718 }
2719 }
2720 return loader;
2721 }
2722
2723
2724 // Support for java_lang_System
2725 int java_lang_System::in_offset_in_bytes() {
2726 return (instanceMirrorKlass::offset_of_static_fields() + static_in_offset);
2727 }
2728
2729
2730 int java_lang_System::out_offset_in_bytes() {
2731 return (instanceMirrorKlass::offset_of_static_fields() + static_out_offset);
2732 }
2733
2734
2735 int java_lang_System::err_offset_in_bytes() {
2736 return (instanceMirrorKlass::offset_of_static_fields() + static_err_offset);
2737 }
2738
2739
2740
2741 int java_lang_String::value_offset;
2742 int java_lang_String::offset_offset;
2743 int java_lang_String::count_offset;
2744 int java_lang_String::hash_offset;
2745 int java_lang_Class::klass_offset;
2746 int java_lang_Class::array_klass_offset;
2747 int java_lang_Class::resolved_constructor_offset;
2748 int java_lang_Class::number_of_fake_oop_fields;
2749 int java_lang_Class::oop_size_offset;
2750 int java_lang_Class::static_oop_field_size_offset;
2751 int java_lang_Throwable::backtrace_offset;
2752 int java_lang_Throwable::detailMessage_offset;
2753 int java_lang_Throwable::cause_offset;
2754 int java_lang_Throwable::stackTrace_offset;
2755 int java_lang_reflect_AccessibleObject::override_offset;
2756 int java_lang_reflect_Method::clazz_offset;
2757 int java_lang_reflect_Method::name_offset;
2758 int java_lang_reflect_Method::returnType_offset;
2759 int java_lang_reflect_Method::parameterTypes_offset;
2760 int java_lang_reflect_Method::exceptionTypes_offset;
2761 int java_lang_reflect_Method::slot_offset;
2762 int java_lang_reflect_Method::modifiers_offset;
2763 int java_lang_reflect_Method::signature_offset;
2764 int java_lang_reflect_Method::annotations_offset;
2765 int java_lang_reflect_Method::parameter_annotations_offset;
2766 int java_lang_reflect_Method::annotation_default_offset;
2767 int java_lang_reflect_Constructor::clazz_offset;
2768 int java_lang_reflect_Constructor::parameterTypes_offset;
2769 int java_lang_reflect_Constructor::exceptionTypes_offset;
2770 int java_lang_reflect_Constructor::slot_offset;
2771 int java_lang_reflect_Constructor::modifiers_offset;
2772 int java_lang_reflect_Constructor::signature_offset;
2773 int java_lang_reflect_Constructor::annotations_offset;
2774 int java_lang_reflect_Constructor::parameter_annotations_offset;
2775 int java_lang_reflect_Field::clazz_offset;
2776 int java_lang_reflect_Field::name_offset;
2777 int java_lang_reflect_Field::type_offset;
2778 int java_lang_reflect_Field::slot_offset;
2779 int java_lang_reflect_Field::modifiers_offset;
2780 int java_lang_reflect_Field::signature_offset;
2781 int java_lang_reflect_Field::annotations_offset;
2782 int java_lang_boxing_object::value_offset;
2783 int java_lang_boxing_object::long_value_offset;
2784 int java_lang_ref_Reference::referent_offset;
2785 int java_lang_ref_Reference::queue_offset;
2786 int java_lang_ref_Reference::next_offset;
2787 int java_lang_ref_Reference::discovered_offset;
2788 int java_lang_ref_Reference::static_lock_offset;
2789 int java_lang_ref_Reference::static_pending_offset;
2790 int java_lang_ref_Reference::number_of_fake_oop_fields;
2791 int java_lang_ref_SoftReference::timestamp_offset;
2792 int java_lang_ref_SoftReference::static_clock_offset;
2793 int java_lang_ClassLoader::parent_offset;
2794 int java_lang_System::static_in_offset;
2795 int java_lang_System::static_out_offset;
2796 int java_lang_System::static_err_offset;
2797 int java_lang_StackTraceElement::declaringClass_offset;
2798 int java_lang_StackTraceElement::methodName_offset;
2799 int java_lang_StackTraceElement::fileName_offset;
2800 int java_lang_StackTraceElement::lineNumber_offset;
2801 int java_lang_AssertionStatusDirectives::classes_offset;
2802 int java_lang_AssertionStatusDirectives::classEnabled_offset;
2803 int java_lang_AssertionStatusDirectives::packages_offset;
2804 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
2805 int java_lang_AssertionStatusDirectives::deflt_offset;
2806 int java_nio_Buffer::_limit_offset;
2807 int sun_misc_AtomicLongCSImpl::_value_offset;
2808 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0;
2809 int sun_reflect_ConstantPool::_cp_oop_offset;
2810 int sun_reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
2811
2812
2813 // Support for java_lang_StackTraceElement
2814
2815 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
2816 element->obj_field_put(fileName_offset, value);
2817 }
2818
2819 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
2820 element->obj_field_put(declaringClass_offset, value);
2821 }
2822
2823 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
2824 element->obj_field_put(methodName_offset, value);
2825 }
2826
2827 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
2828 element->int_field_put(lineNumber_offset, value);
2829 }
2830
2831
2832 // Support for java Assertions - java_lang_AssertionStatusDirectives.
2833
2834 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
2835 o->obj_field_put(classes_offset, val);
2836 }
2837
2838 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
2839 o->obj_field_put(classEnabled_offset, val);
2840 }
2841
2842 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
2843 o->obj_field_put(packages_offset, val);
2844 }
2845
2846 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
2847 o->obj_field_put(packageEnabled_offset, val);
2848 }
2849
2850 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
2851 o->bool_field_put(deflt_offset, val);
2852 }
2853
2854
2855 // Support for intrinsification of java.nio.Buffer.checkIndex
2856 int java_nio_Buffer::limit_offset() {
2857 return _limit_offset;
2858 }
2859
2860
2861 void java_nio_Buffer::compute_offsets() {
2862 klassOop k = SystemDictionary::java_nio_Buffer_klass();
2863 assert(k != NULL, "must be loaded in 1.4+");
2864 compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature());
2865 }
2866
2867 // Support for intrinsification of sun.misc.AtomicLongCSImpl.attemptUpdate
2868 int sun_misc_AtomicLongCSImpl::value_offset() {
2869 assert(SystemDictionary::sun_misc_AtomicLongCSImpl_klass() != NULL, "can't call this");
2870 return _value_offset;
2871 }
2872
2873
2874 void sun_misc_AtomicLongCSImpl::compute_offsets() {
2875 klassOop k = SystemDictionary::sun_misc_AtomicLongCSImpl_klass();
2876 // If this class is not present, its value field offset won't be referenced.
2877 if (k != NULL) {
2878 compute_offset(_value_offset, k, vmSymbols::value_name(), vmSymbols::long_signature());
2879 }
2880 }
2881
2882 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) {
2883 if (_owner_offset != 0) return;
2884
2885 assert(JDK_Version::is_gte_jdk16x_version(), "Must be JDK 1.6 or later");
2886 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK);
2887 klassOop k = SystemDictionary::abstract_ownable_synchronizer_klass();
2888 compute_offset(_owner_offset, k,
2889 vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature());
2890 }
2891
2892 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
2893 assert(_owner_offset != 0, "Must be initialized");
2894 return obj->obj_field(_owner_offset);
2895 }
2896
2897 // Compute hard-coded offsets
2898 // Invoked before SystemDictionary::initialize, so pre-loaded classes
2899 // are not available to determine the offset_of_static_fields.
2900 void JavaClasses::compute_hard_coded_offsets() {
2901 const int x = heapOopSize;
2902 const int header = instanceOopDesc::base_offset_in_bytes();
2903
2904 // Do the String Class
2905 java_lang_String::value_offset = java_lang_String::hc_value_offset * x + header;
2906 java_lang_String::offset_offset = java_lang_String::hc_offset_offset * x + header;
2907 java_lang_String::count_offset = java_lang_String::offset_offset + sizeof (jint);
2908 java_lang_String::hash_offset = java_lang_String::count_offset + sizeof (jint);
2909
2910 // Do the Class Class
2911 java_lang_Class::klass_offset = java_lang_Class::hc_klass_offset * x + header;
2912 java_lang_Class::array_klass_offset = java_lang_Class::hc_array_klass_offset * x + header;
2913 java_lang_Class::resolved_constructor_offset = java_lang_Class::hc_resolved_constructor_offset * x + header;
2914
2915 // This is NOT an offset
2916 java_lang_Class::number_of_fake_oop_fields = java_lang_Class::hc_number_of_fake_oop_fields;
2917
2918 // Throwable Class
2919 java_lang_Throwable::backtrace_offset = java_lang_Throwable::hc_backtrace_offset * x + header;
2920 java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header;
2921 java_lang_Throwable::cause_offset = java_lang_Throwable::hc_cause_offset * x + header;
2922 java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header;
2923
2924 // java_lang_boxing_object
2925 java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header;
2926 java_lang_boxing_object::long_value_offset = align_size_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong);
2927
2928 // java_lang_ref_Reference:
2929 java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header;
2930 java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header;
2931 java_lang_ref_Reference::next_offset = java_lang_ref_Reference::hc_next_offset * x + header;
2932 java_lang_ref_Reference::discovered_offset = java_lang_ref_Reference::hc_discovered_offset * x + header;
2933 java_lang_ref_Reference::static_lock_offset = java_lang_ref_Reference::hc_static_lock_offset * x;
2934 java_lang_ref_Reference::static_pending_offset = java_lang_ref_Reference::hc_static_pending_offset * x;
2935 // Artificial fields for java_lang_ref_Reference
2936 // The first field is for the discovered field added in 1.4
2937 java_lang_ref_Reference::number_of_fake_oop_fields = 1;
2938
2939 // java_lang_ref_SoftReference Class
2940 java_lang_ref_SoftReference::timestamp_offset = align_size_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong);
2941 // Don't multiply static fields because they are always in wordSize units
2942 java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x;
2943
2944 // java_lang_ClassLoader
2945 java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header;
2946
2947 // java_lang_System
2948 java_lang_System::static_in_offset = java_lang_System::hc_static_in_offset * x;
2949 java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x;
2950 java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x;
2951
2952 // java_lang_StackTraceElement
2953 java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset * x + header;
2954 java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header;
2955 java_lang_StackTraceElement::fileName_offset = java_lang_StackTraceElement::hc_fileName_offset * x + header;
2956 java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header;
2957 java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header;
2958 java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header;
2959 java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header;
2960 java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header;
2961 java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header;
2962
2963 }
2964
2965
2966 // Compute non-hard-coded field offsets of all the classes in this file
2967 void JavaClasses::compute_offsets() {
2968
2969 java_lang_Class::compute_offsets();
2970 java_lang_Thread::compute_offsets();
2971 java_lang_ThreadGroup::compute_offsets();
2972 if (EnableMethodHandles) {
2973 java_dyn_MethodHandle::compute_offsets();
2974 sun_dyn_MemberName::compute_offsets();
2975 sun_dyn_DirectMethodHandle::compute_offsets();
2976 sun_dyn_BoundMethodHandle::compute_offsets();
2977 sun_dyn_AdapterMethodHandle::compute_offsets();
2978 java_dyn_MethodType::compute_offsets();
2979 java_dyn_MethodTypeForm::compute_offsets();
2980 }
2981 if (EnableInvokeDynamic) {
2982 java_dyn_CallSite::compute_offsets();
2983 }
2984 java_security_AccessControlContext::compute_offsets();
2985 // Initialize reflection classes. The layouts of these classes
2986 // changed with the new reflection implementation in JDK 1.4, and
2987 // since the Universe doesn't know what JDK version it is until this
2988 // point we defer computation of these offsets until now.
2989 java_lang_reflect_AccessibleObject::compute_offsets();
2990 java_lang_reflect_Method::compute_offsets();
2991 java_lang_reflect_Constructor::compute_offsets();
2992 java_lang_reflect_Field::compute_offsets();
2993 if (JDK_Version::is_gte_jdk14x_version()) {
2994 java_nio_Buffer::compute_offsets();
2995 }
2996 if (JDK_Version::is_gte_jdk15x_version()) {
2997 sun_reflect_ConstantPool::compute_offsets();
2998 sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets();
2999 }
3000 sun_misc_AtomicLongCSImpl::compute_offsets();
3001
3002 // generated interpreter code wants to know about the offsets we just computed:
3003 AbstractAssembler::update_delayed_values();
3004 }
3005
3006 #ifndef PRODUCT
3007
3008 // These functions exist to assert the validity of hard-coded field offsets to guard
3009 // against changes in the class files
3010
3011 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
3012 EXCEPTION_MARK;
3013 fieldDescriptor fd;
3014 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3015 klassOop k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3016 instanceKlassHandle h_klass (THREAD, k);
3017 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3018 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3019 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3020 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
3021 return false;
3022 }
3023 if (fd.is_static()) {
3024 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
3025 return false;
3026 }
3027 if (fd.offset() == hardcoded_offset ) {
3028 return true;
3029 } else {
3030 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
3031 klass_name, field_name, hardcoded_offset, fd.offset());
3032 return false;
3033 }
3034 }
3035
3036
3037 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
3038 EXCEPTION_MARK;
3039 fieldDescriptor fd;
3040 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3041 klassOop k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3042 instanceKlassHandle h_klass (THREAD, k);
3043 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3044 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3045 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3046 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3047 return false;
3048 }
3049 if (!fd.is_static()) {
3050 tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name);
3051 return false;
3052 }
3053 if (fd.offset() == hardcoded_offset + instanceMirrorKlass::offset_of_static_fields()) {
3054 return true;
3055 } else {
3056 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());
3057 return false;
3058 }
3059 }
3060
3061
3062 bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) {
3063 EXCEPTION_MARK;
3064 fieldDescriptor fd;
3065 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3066 klassOop k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3067 instanceKlassHandle h_klass (THREAD, k);
3068 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3069 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3070 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3071 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3072 return false;
3073 }
3074 if (!fd.is_static() || !fd.has_initial_value()) {
3075 tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name);
3076 return false;
3077 }
3078 if (!fd.initial_value_tag().is_int()) {
3079 tty->print_cr("Static field %s.%s is not an int", klass_name, field_name);
3080 return false;
3081 }
3082 jint field_value = fd.int_initial_value();
3083 if (field_value == hardcoded_constant) {
3084 return true;
3085 } else {
3086 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);
3087 return false;
3088 }
3089 }
3090
3091
3092 // Check the hard-coded field offsets of all the classes in this file
3093
3094 void JavaClasses::check_offsets() {
3095 bool valid = true;
3096
3097 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3098 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
3099
3100 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3101 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
3102
3103 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3104 valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig)
3105
3106 #define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \
3107 valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig)
3108
3109 // java.lang.String
3110
3111 CHECK_OFFSET("java/lang/String", java_lang_String, value, "[C");
3112 CHECK_OFFSET("java/lang/String", java_lang_String, offset, "I");
3113 CHECK_OFFSET("java/lang/String", java_lang_String, count, "I");
3114 CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I");
3115
3116 // java.lang.Class
3117
3118 // Fake fields
3119 // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked
3120 // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked
3121 // CHECK_OFFSET("java/lang/Class", java_lang_Class, resolved_constructor); // %%% this needs to be checked
3122
3123 // java.lang.Throwable
3124
3125 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;");
3126 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;");
3127 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, cause, "Ljava/lang/Throwable;");
3128 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;");
3129
3130 // Boxed primitive objects (java_lang_boxing_object)
3131
3132 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
3133 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
3134 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
3135 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
3136 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
3137 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
3138 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
3139 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
3140
3141 // java.lang.ClassLoader
3142
3143 CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent, "Ljava/lang/ClassLoader;");
3144
3145 // java.lang.System
3146
3147 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, in, "Ljava/io/InputStream;");
3148 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;");
3149 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;");
3150
3151 // java.lang.StackTraceElement
3152
3153 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;");
3154 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;");
3155 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, fileName, "Ljava/lang/String;");
3156 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I");
3157
3158 // java.lang.ref.Reference
3159
3160 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
3161 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
3162 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
3163 // Fake field
3164 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
3165 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, lock, "Ljava/lang/ref/Reference$Lock;");
3166 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, pending, "Ljava/lang/ref/Reference;");
3167
3168 // java.lang.ref.SoftReference
3169
3170 CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J");
3171 CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J");
3172
3173 // java.lang.AssertionStatusDirectives
3174 //
3175 // The CheckAssertionStatusDirectives boolean can be removed from here and
3176 // globals.hpp after the AssertionStatusDirectives class has been integrated
3177 // into merlin "for some time." Without it, the vm will fail with early
3178 // merlin builds.
3179
3180 if (CheckAssertionStatusDirectives && JDK_Version::is_gte_jdk14x_version()) {
3181 const char* nm = "java/lang/AssertionStatusDirectives";
3182 const char* sig = "[Ljava/lang/String;";
3183 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig);
3184 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z");
3185 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig);
3186 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z");
3187 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z");
3188 }
3189
3190 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
3191 }
3192
3193 #endif // PRODUCT
3194
3195 void javaClasses_init() {
3196 JavaClasses::compute_offsets();
3197 JavaClasses::check_offsets();
3198 FilteredFieldsMap::initialize(); // must be done after computing offsets.
3199 }