Thu, 07 Jul 2011 10:51:07 -0700
Merge
1 /*
2 * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
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
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 }
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 }
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 }
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 }
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 }
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);
126 return h_obj;
127 }
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 }
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 }
142 Handle java_lang_String::create_tenured_from_unicode(jchar* unicode, int length, TRAPS) {
143 return basic_create_from_unicode(unicode, length, JavaObjectsInPerm, CHECK_NH);
144 }
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 }
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 }
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 }
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 }
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");
181 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *);
182 static to_java_string_fn_t _to_java_string_fn = NULL;
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 }
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 }
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) {
206 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
207 static to_platform_string_fn_t _to_platform_string_fn = NULL;
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 }
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 }
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);
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 }
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);
256 typeArrayOop from_buffer = h_value();
257 typeArrayOop to_buffer = java_lang_String::value(string());
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 }
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);
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 }
282 unsigned int java_lang_String::hash_string(oop java_string) {
283 typeArrayOop value = java_lang_String::value(java_string);
284 int offset = java_lang_String::offset(java_string);
285 int length = java_lang_String::length(java_string);
287 if (length == 0) return 0;
288 return hash_string(value->char_at_addr(offset), length);
289 }
291 Symbol* java_lang_String::as_symbol(Handle java_string, TRAPS) {
292 oop obj = java_string();
293 typeArrayOop value = java_lang_String::value(obj);
294 int offset = java_lang_String::offset(obj);
295 int length = java_lang_String::length(obj);
296 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
297 Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD);
298 return sym;
299 }
301 Symbol* java_lang_String::as_symbol_or_null(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* base = (length == 0) ? NULL : value->char_at_addr(offset);
306 return SymbolTable::probe_unicode(base, length);
307 }
310 int java_lang_String::utf8_length(oop java_string) {
311 typeArrayOop value = java_lang_String::value(java_string);
312 int offset = java_lang_String::offset(java_string);
313 int length = java_lang_String::length(java_string);
314 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
315 return UNICODE::utf8_length(position, length);
316 }
318 char* java_lang_String::as_utf8_string(oop java_string) {
319 typeArrayOop value = java_lang_String::value(java_string);
320 int offset = java_lang_String::offset(java_string);
321 int length = java_lang_String::length(java_string);
322 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
323 return UNICODE::as_utf8(position, length);
324 }
326 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) {
327 typeArrayOop value = java_lang_String::value(java_string);
328 int offset = java_lang_String::offset(java_string);
329 int length = java_lang_String::length(java_string);
330 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
331 return UNICODE::as_utf8(position, length, buf, buflen);
332 }
334 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
335 typeArrayOop value = java_lang_String::value(java_string);
336 int offset = java_lang_String::offset(java_string);
337 int length = java_lang_String::length(java_string);
338 assert(start + len <= length, "just checking");
339 jchar* position = value->char_at_addr(offset + start);
340 return UNICODE::as_utf8(position, len);
341 }
343 bool java_lang_String::equals(oop java_string, jchar* chars, int len) {
344 assert(SharedSkipVerify ||
345 java_string->klass() == SystemDictionary::String_klass(),
346 "must be java_string");
347 typeArrayOop value = java_lang_String::value(java_string);
348 int offset = java_lang_String::offset(java_string);
349 int length = java_lang_String::length(java_string);
350 if (length != len) {
351 return false;
352 }
353 for (int i = 0; i < len; i++) {
354 if (value->char_at(i + offset) != chars[i]) {
355 return false;
356 }
357 }
358 return true;
359 }
361 void java_lang_String::print(Handle java_string, outputStream* st) {
362 oop obj = java_string();
363 assert(obj->klass() == SystemDictionary::String_klass(), "must be java_string");
364 typeArrayOop value = java_lang_String::value(obj);
365 int offset = java_lang_String::offset(obj);
366 int length = java_lang_String::length(obj);
368 int end = MIN2(length, 100);
369 if (value == NULL) {
370 // This can happen if, e.g., printing a String
371 // object before its initializer has been called
372 st->print_cr("NULL");
373 } else {
374 st->print("\"");
375 for (int index = 0; index < length; index++) {
376 st->print("%c", value->char_at(index + offset));
377 }
378 st->print("\"");
379 }
380 }
382 static void initialize_static_field(fieldDescriptor* fd, TRAPS) {
383 Handle mirror (THREAD, fd->field_holder()->java_mirror());
384 assert(mirror.not_null() && fd->is_static(), "just checking");
385 if (fd->has_initial_value()) {
386 BasicType t = fd->field_type();
387 switch (t) {
388 case T_BYTE:
389 mirror()->byte_field_put(fd->offset(), fd->int_initial_value());
390 break;
391 case T_BOOLEAN:
392 mirror()->bool_field_put(fd->offset(), fd->int_initial_value());
393 break;
394 case T_CHAR:
395 mirror()->char_field_put(fd->offset(), fd->int_initial_value());
396 break;
397 case T_SHORT:
398 mirror()->short_field_put(fd->offset(), fd->int_initial_value());
399 break;
400 case T_INT:
401 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
402 break;
403 case T_FLOAT:
404 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
405 break;
406 case T_DOUBLE:
407 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
408 break;
409 case T_LONG:
410 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
411 break;
412 case T_OBJECT:
413 {
414 #ifdef ASSERT
415 TempNewSymbol sym = SymbolTable::new_symbol("Ljava/lang/String;", CHECK);
416 assert(fd->signature() == sym, "just checking");
417 #endif
418 oop string = fd->string_initial_value(CHECK);
419 mirror()->obj_field_put(fd->offset(), string);
420 }
421 break;
422 default:
423 THROW_MSG(vmSymbols::java_lang_ClassFormatError(),
424 "Illegal ConstantValue attribute in class file");
425 }
426 }
427 }
430 // During bootstrap, java.lang.Class wasn't loaded so static field
431 // offsets were computed without the size added it. Go back and
432 // update all the static field offsets to included the size.
433 static void fixup_static_field(fieldDescriptor* fd, TRAPS) {
434 if (fd->is_static()) {
435 int real_offset = fd->offset() + instanceMirrorKlass::offset_of_static_fields();
436 typeArrayOop fields = instanceKlass::cast(fd->field_holder())->fields();
437 fields->short_at_put(fd->index() + instanceKlass::low_offset, extract_low_short_from_int(real_offset));
438 fields->short_at_put(fd->index() + instanceKlass::high_offset, extract_high_short_from_int(real_offset));
439 }
440 }
442 void java_lang_Class::fixup_mirror(KlassHandle k, TRAPS) {
443 assert(instanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
445 if (k->oop_is_instance()) {
446 // Fixup the offsets
447 instanceKlass::cast(k())->do_local_static_fields(&fixup_static_field, CHECK);
448 }
449 create_mirror(k, CHECK);
450 }
452 oop java_lang_Class::create_mirror(KlassHandle k, TRAPS) {
453 assert(k->java_mirror() == NULL, "should only assign mirror once");
454 // Use this moment of initialization to cache modifier_flags also,
455 // to support Class.getModifiers(). Instance classes recalculate
456 // the cached flags after the class file is parsed, but before the
457 // class is put into the system dictionary.
458 int computed_modifiers = k->compute_modifier_flags(CHECK_0);
459 k->set_modifier_flags(computed_modifiers);
460 if (SystemDictionary::Class_klass_loaded() && (k->oop_is_instance() || k->oop_is_javaArray())) {
461 // Allocate mirror (java.lang.Class instance)
462 Handle mirror = instanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK_0);
463 // Setup indirections
464 mirror->obj_field_put(klass_offset, k());
465 k->set_java_mirror(mirror());
467 instanceMirrorKlass* mk = instanceMirrorKlass::cast(mirror->klass());
468 java_lang_Class::set_oop_size(mirror(), mk->instance_size(k));
469 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
471 // It might also have a component mirror. This mirror must already exist.
472 if (k->oop_is_javaArray()) {
473 Handle comp_mirror;
474 if (k->oop_is_typeArray()) {
475 BasicType type = typeArrayKlass::cast(k->as_klassOop())->element_type();
476 comp_mirror = Universe::java_mirror(type);
477 assert(comp_mirror.not_null(), "must have primitive mirror");
478 } else if (k->oop_is_objArray()) {
479 klassOop element_klass = objArrayKlass::cast(k->as_klassOop())->element_klass();
480 if (element_klass != NULL
481 && (Klass::cast(element_klass)->oop_is_instance() ||
482 Klass::cast(element_klass)->oop_is_javaArray())) {
483 comp_mirror = Klass::cast(element_klass)->java_mirror();
484 assert(comp_mirror.not_null(), "must have element mirror");
485 }
486 // else some object array internal to the VM, like systemObjArrayKlassObj
487 }
488 if (comp_mirror.not_null()) {
489 // Two-way link between the array klass and its component mirror:
490 arrayKlass::cast(k->as_klassOop())->set_component_mirror(comp_mirror());
491 set_array_klass(comp_mirror(), k->as_klassOop());
492 }
493 } else if (k->oop_is_instance()) {
494 // Initialize static fields
495 instanceKlass::cast(k())->do_local_static_fields(&initialize_static_field, CHECK_NULL);
496 }
497 return mirror();
498 } else {
499 return NULL;
500 }
501 }
505 int java_lang_Class::oop_size(oop java_class) {
506 assert(oop_size_offset != 0, "must be set");
507 return java_class->int_field(oop_size_offset);
508 }
509 void java_lang_Class::set_oop_size(oop java_class, int size) {
510 assert(oop_size_offset != 0, "must be set");
511 java_class->int_field_put(oop_size_offset, size);
512 }
513 int java_lang_Class::static_oop_field_count(oop java_class) {
514 assert(static_oop_field_count_offset != 0, "must be set");
515 return java_class->int_field(static_oop_field_count_offset);
516 }
517 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
518 assert(static_oop_field_count_offset != 0, "must be set");
519 java_class->int_field_put(static_oop_field_count_offset, size);
520 }
525 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
526 // This should be improved by adding a field at the Java level or by
527 // introducing a new VM klass (see comment in ClassFileParser)
528 oop java_class = instanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance((oop)NULL, CHECK_0);
529 if (type != T_VOID) {
530 klassOop aklass = Universe::typeArrayKlassObj(type);
531 assert(aklass != NULL, "correct bootstrap");
532 set_array_klass(java_class, aklass);
533 }
534 instanceMirrorKlass* mk = instanceMirrorKlass::cast(SystemDictionary::Class_klass());
535 java_lang_Class::set_oop_size(java_class, mk->instance_size(oop(NULL)));
536 java_lang_Class::set_static_oop_field_count(java_class, 0);
537 return java_class;
538 }
541 klassOop java_lang_Class::as_klassOop(oop java_class) {
542 //%note memory_2
543 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
544 klassOop k = klassOop(java_class->obj_field(klass_offset));
545 assert(k == NULL || k->is_klass(), "type check");
546 return k;
547 }
550 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
551 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
552 Symbol* name = NULL;
553 bool is_instance = false;
554 if (is_primitive(java_class)) {
555 name = vmSymbols::type_signature(primitive_type(java_class));
556 } else {
557 klassOop k = as_klassOop(java_class);
558 is_instance = Klass::cast(k)->oop_is_instance();
559 name = Klass::cast(k)->name();
560 }
561 if (name == NULL) {
562 st->print("<null>");
563 return;
564 }
565 if (is_instance) st->print("L");
566 st->write((char*) name->base(), (int) name->utf8_length());
567 if (is_instance) st->print(";");
568 }
570 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) {
571 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
572 Symbol* name;
573 if (is_primitive(java_class)) {
574 name = vmSymbols::type_signature(primitive_type(java_class));
575 // Because this can create a new symbol, the caller has to decrement
576 // the refcount, so make adjustment here and below for symbols returned
577 // that are not created or incremented due to a successful lookup.
578 name->increment_refcount();
579 } else {
580 klassOop k = as_klassOop(java_class);
581 if (!Klass::cast(k)->oop_is_instance()) {
582 name = Klass::cast(k)->name();
583 name->increment_refcount();
584 } else {
585 ResourceMark rm;
586 const char* sigstr = Klass::cast(k)->signature_name();
587 int siglen = (int) strlen(sigstr);
588 if (!intern_if_not_found) {
589 name = SymbolTable::probe(sigstr, siglen);
590 } else {
591 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
592 }
593 }
594 }
595 return name;
596 }
599 klassOop java_lang_Class::array_klass(oop java_class) {
600 klassOop k = klassOop(java_class->obj_field(array_klass_offset));
601 assert(k == NULL || k->is_klass() && Klass::cast(k)->oop_is_javaArray(), "should be array klass");
602 return k;
603 }
606 void java_lang_Class::set_array_klass(oop java_class, klassOop klass) {
607 assert(klass->is_klass() && Klass::cast(klass)->oop_is_javaArray(), "should be array klass");
608 java_class->obj_field_put(array_klass_offset, klass);
609 }
612 methodOop java_lang_Class::resolved_constructor(oop java_class) {
613 oop constructor = java_class->obj_field(resolved_constructor_offset);
614 assert(constructor == NULL || constructor->is_method(), "should be method");
615 return methodOop(constructor);
616 }
619 void java_lang_Class::set_resolved_constructor(oop java_class, methodOop constructor) {
620 assert(constructor->is_method(), "should be method");
621 java_class->obj_field_put(resolved_constructor_offset, constructor);
622 }
625 bool java_lang_Class::is_primitive(oop java_class) {
626 // should assert:
627 //assert(java_lang_Class::is_instance(java_class), "must be a Class object");
628 klassOop k = klassOop(java_class->obj_field(klass_offset));
629 return k == NULL;
630 }
633 BasicType java_lang_Class::primitive_type(oop java_class) {
634 assert(java_lang_Class::is_primitive(java_class), "just checking");
635 klassOop ak = klassOop(java_class->obj_field(array_klass_offset));
636 BasicType type = T_VOID;
637 if (ak != NULL) {
638 // Note: create_basic_type_mirror above initializes ak to a non-null value.
639 type = arrayKlass::cast(ak)->element_type();
640 } else {
641 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
642 }
643 assert(Universe::java_mirror(type) == java_class, "must be consistent");
644 return type;
645 }
647 BasicType java_lang_Class::as_BasicType(oop java_class, klassOop* reference_klass) {
648 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
649 if (is_primitive(java_class)) {
650 if (reference_klass != NULL)
651 (*reference_klass) = NULL;
652 return primitive_type(java_class);
653 } else {
654 if (reference_klass != NULL)
655 (*reference_klass) = as_klassOop(java_class);
656 return T_OBJECT;
657 }
658 }
661 oop java_lang_Class::primitive_mirror(BasicType t) {
662 oop mirror = Universe::java_mirror(t);
663 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class");
664 assert(java_lang_Class::is_primitive(mirror), "must be primitive");
665 return mirror;
666 }
668 bool java_lang_Class::offsets_computed = false;
669 int java_lang_Class::classRedefinedCount_offset = -1;
670 int java_lang_Class::parallelCapable_offset = -1;
672 void java_lang_Class::compute_offsets() {
673 assert(!offsets_computed, "offsets should be initialized only once");
674 offsets_computed = true;
676 klassOop k = SystemDictionary::Class_klass();
677 // The classRedefinedCount field is only present starting in 1.5,
678 // so don't go fatal.
679 compute_optional_offset(classRedefinedCount_offset,
680 k, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature());
682 // The field indicating parallelCapable (parallelLockMap) is only present starting in 7,
683 klassOop k1 = SystemDictionary::ClassLoader_klass();
684 compute_optional_offset(parallelCapable_offset,
685 k1, vmSymbols::parallelCapable_name(), vmSymbols::concurrenthashmap_signature());
686 }
688 // For class loader classes, parallelCapable defined
689 // based on non-null field
690 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
691 bool java_lang_Class::parallelCapable(oop class_loader) {
692 if (!JDK_Version::is_gte_jdk17x_version()
693 || parallelCapable_offset == -1) {
694 // Default for backward compatibility is false
695 return false;
696 }
697 return (class_loader->obj_field(parallelCapable_offset) != NULL);
698 }
700 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
701 if (!JDK_Version::is_gte_jdk15x_version()
702 || classRedefinedCount_offset == -1) {
703 // The classRedefinedCount field is only present starting in 1.5.
704 // If we don't have an offset for it then just return -1 as a marker.
705 return -1;
706 }
708 return the_class_mirror->int_field(classRedefinedCount_offset);
709 }
711 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
712 if (!JDK_Version::is_gte_jdk15x_version()
713 || classRedefinedCount_offset == -1) {
714 // The classRedefinedCount field is only present starting in 1.5.
715 // If we don't have an offset for it then nothing to set.
716 return;
717 }
719 the_class_mirror->int_field_put(classRedefinedCount_offset, value);
720 }
723 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
724 // platform thread structure, and a eetop offset which was used for thread
725 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
726 // merged, so in the HotSpot VM we just use the eetop field for the thread
727 // instead of the privateInfo_offset.
728 //
729 // Note: The stackSize field is only present starting in 1.4.
731 int java_lang_Thread::_name_offset = 0;
732 int java_lang_Thread::_group_offset = 0;
733 int java_lang_Thread::_contextClassLoader_offset = 0;
734 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
735 int java_lang_Thread::_priority_offset = 0;
736 int java_lang_Thread::_eetop_offset = 0;
737 int java_lang_Thread::_daemon_offset = 0;
738 int java_lang_Thread::_stillborn_offset = 0;
739 int java_lang_Thread::_stackSize_offset = 0;
740 int java_lang_Thread::_tid_offset = 0;
741 int java_lang_Thread::_thread_status_offset = 0;
742 int java_lang_Thread::_park_blocker_offset = 0;
743 int java_lang_Thread::_park_event_offset = 0 ;
746 void java_lang_Thread::compute_offsets() {
747 assert(_group_offset == 0, "offsets should be initialized only once");
749 klassOop k = SystemDictionary::Thread_klass();
750 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::char_array_signature());
751 compute_offset(_group_offset, k, vmSymbols::group_name(), vmSymbols::threadgroup_signature());
752 compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature());
753 compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature());
754 compute_offset(_priority_offset, k, vmSymbols::priority_name(), vmSymbols::int_signature());
755 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
756 compute_offset(_eetop_offset, k, vmSymbols::eetop_name(), vmSymbols::long_signature());
757 compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature());
758 // The stackSize field is only present starting in 1.4, so don't go fatal.
759 compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature());
760 // The tid and thread_status fields are only present starting in 1.5, so don't go fatal.
761 compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature());
762 compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature());
763 // The parkBlocker field is only present starting in 1.6, so don't go fatal.
764 compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature());
765 compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(),
766 vmSymbols::long_signature());
767 }
770 JavaThread* java_lang_Thread::thread(oop java_thread) {
771 return (JavaThread*)java_thread->address_field(_eetop_offset);
772 }
775 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
776 java_thread->address_field_put(_eetop_offset, (address)thread);
777 }
780 typeArrayOop java_lang_Thread::name(oop java_thread) {
781 oop name = java_thread->obj_field(_name_offset);
782 assert(name == NULL || (name->is_typeArray() && typeArrayKlass::cast(name->klass())->element_type() == T_CHAR), "just checking");
783 return typeArrayOop(name);
784 }
787 void java_lang_Thread::set_name(oop java_thread, typeArrayOop name) {
788 assert(java_thread->obj_field(_name_offset) == NULL, "name should be NULL");
789 java_thread->obj_field_put(_name_offset, name);
790 }
793 ThreadPriority java_lang_Thread::priority(oop java_thread) {
794 return (ThreadPriority)java_thread->int_field(_priority_offset);
795 }
798 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
799 java_thread->int_field_put(_priority_offset, priority);
800 }
803 oop java_lang_Thread::threadGroup(oop java_thread) {
804 return java_thread->obj_field(_group_offset);
805 }
808 bool java_lang_Thread::is_stillborn(oop java_thread) {
809 return java_thread->bool_field(_stillborn_offset) != 0;
810 }
813 // We never have reason to turn the stillborn bit off
814 void java_lang_Thread::set_stillborn(oop java_thread) {
815 java_thread->bool_field_put(_stillborn_offset, true);
816 }
819 bool java_lang_Thread::is_alive(oop java_thread) {
820 JavaThread* thr = java_lang_Thread::thread(java_thread);
821 return (thr != NULL);
822 }
825 bool java_lang_Thread::is_daemon(oop java_thread) {
826 return java_thread->bool_field(_daemon_offset) != 0;
827 }
830 void java_lang_Thread::set_daemon(oop java_thread) {
831 java_thread->bool_field_put(_daemon_offset, true);
832 }
834 oop java_lang_Thread::context_class_loader(oop java_thread) {
835 return java_thread->obj_field(_contextClassLoader_offset);
836 }
838 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
839 return java_thread->obj_field(_inheritedAccessControlContext_offset);
840 }
843 jlong java_lang_Thread::stackSize(oop java_thread) {
844 // The stackSize field is only present starting in 1.4
845 if (_stackSize_offset > 0) {
846 assert(JDK_Version::is_gte_jdk14x_version(), "sanity check");
847 return java_thread->long_field(_stackSize_offset);
848 } else {
849 return 0;
850 }
851 }
853 // Write the thread status value to threadStatus field in java.lang.Thread java class.
854 void java_lang_Thread::set_thread_status(oop java_thread,
855 java_lang_Thread::ThreadStatus status) {
856 assert(JavaThread::current()->thread_state() == _thread_in_vm, "Java Thread is not running in vm");
857 // The threadStatus is only present starting in 1.5
858 if (_thread_status_offset > 0) {
859 java_thread->int_field_put(_thread_status_offset, status);
860 }
861 }
863 // Read thread status value from threadStatus field in java.lang.Thread java class.
864 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
865 assert(Thread::current()->is_VM_thread() ||
866 JavaThread::current()->thread_state() == _thread_in_vm,
867 "Java Thread is not running in vm");
868 // The threadStatus is only present starting in 1.5
869 if (_thread_status_offset > 0) {
870 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
871 } else {
872 // All we can easily figure out is if it is alive, but that is
873 // enough info for a valid unknown status.
874 // These aren't restricted to valid set ThreadStatus values, so
875 // use JVMTI values and cast.
876 JavaThread* thr = java_lang_Thread::thread(java_thread);
877 if (thr == NULL) {
878 // the thread hasn't run yet or is in the process of exiting
879 return NEW;
880 }
881 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE;
882 }
883 }
886 jlong java_lang_Thread::thread_id(oop java_thread) {
887 // The thread ID field is only present starting in 1.5
888 if (_tid_offset > 0) {
889 return java_thread->long_field(_tid_offset);
890 } else {
891 return 0;
892 }
893 }
895 oop java_lang_Thread::park_blocker(oop java_thread) {
896 assert(JDK_Version::current().supports_thread_park_blocker() &&
897 _park_blocker_offset != 0, "Must support parkBlocker field");
899 if (_park_blocker_offset > 0) {
900 return java_thread->obj_field(_park_blocker_offset);
901 }
903 return NULL;
904 }
906 jlong java_lang_Thread::park_event(oop java_thread) {
907 if (_park_event_offset > 0) {
908 return java_thread->long_field(_park_event_offset);
909 }
910 return 0;
911 }
913 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) {
914 if (_park_event_offset > 0) {
915 java_thread->long_field_put(_park_event_offset, ptr);
916 return true;
917 }
918 return false;
919 }
922 const char* java_lang_Thread::thread_status_name(oop java_thread) {
923 assert(JDK_Version::is_gte_jdk15x_version() && _thread_status_offset != 0, "Must have thread status");
924 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
925 switch (status) {
926 case NEW : return "NEW";
927 case RUNNABLE : return "RUNNABLE";
928 case SLEEPING : return "TIMED_WAITING (sleeping)";
929 case IN_OBJECT_WAIT : return "WAITING (on object monitor)";
930 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
931 case PARKED : return "WAITING (parking)";
932 case PARKED_TIMED : return "TIMED_WAITING (parking)";
933 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
934 case TERMINATED : return "TERMINATED";
935 default : return "UNKNOWN";
936 };
937 }
938 int java_lang_ThreadGroup::_parent_offset = 0;
939 int java_lang_ThreadGroup::_name_offset = 0;
940 int java_lang_ThreadGroup::_threads_offset = 0;
941 int java_lang_ThreadGroup::_groups_offset = 0;
942 int java_lang_ThreadGroup::_maxPriority_offset = 0;
943 int java_lang_ThreadGroup::_destroyed_offset = 0;
944 int java_lang_ThreadGroup::_daemon_offset = 0;
945 int java_lang_ThreadGroup::_vmAllowSuspension_offset = 0;
946 int java_lang_ThreadGroup::_nthreads_offset = 0;
947 int java_lang_ThreadGroup::_ngroups_offset = 0;
949 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
950 assert(java_thread_group->is_oop(), "thread group must be oop");
951 return java_thread_group->obj_field(_parent_offset);
952 }
954 // ("name as oop" accessor is not necessary)
956 typeArrayOop java_lang_ThreadGroup::name(oop java_thread_group) {
957 oop name = java_thread_group->obj_field(_name_offset);
958 // ThreadGroup.name can be null
959 return name == NULL ? (typeArrayOop)NULL : java_lang_String::value(name);
960 }
962 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
963 assert(java_thread_group->is_oop(), "thread group must be oop");
964 return java_thread_group->int_field(_nthreads_offset);
965 }
967 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
968 oop threads = java_thread_group->obj_field(_threads_offset);
969 assert(threads != NULL, "threadgroups should have threads");
970 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
971 return objArrayOop(threads);
972 }
974 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
975 assert(java_thread_group->is_oop(), "thread group must be oop");
976 return java_thread_group->int_field(_ngroups_offset);
977 }
979 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
980 oop groups = java_thread_group->obj_field(_groups_offset);
981 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
982 return objArrayOop(groups);
983 }
985 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
986 assert(java_thread_group->is_oop(), "thread group must be oop");
987 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
988 }
990 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
991 assert(java_thread_group->is_oop(), "thread group must be oop");
992 return java_thread_group->bool_field(_destroyed_offset) != 0;
993 }
995 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
996 assert(java_thread_group->is_oop(), "thread group must be oop");
997 return java_thread_group->bool_field(_daemon_offset) != 0;
998 }
1000 bool java_lang_ThreadGroup::is_vmAllowSuspension(oop java_thread_group) {
1001 assert(java_thread_group->is_oop(), "thread group must be oop");
1002 return java_thread_group->bool_field(_vmAllowSuspension_offset) != 0;
1003 }
1005 void java_lang_ThreadGroup::compute_offsets() {
1006 assert(_parent_offset == 0, "offsets should be initialized only once");
1008 klassOop k = SystemDictionary::ThreadGroup_klass();
1010 compute_offset(_parent_offset, k, vmSymbols::parent_name(), vmSymbols::threadgroup_signature());
1011 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1012 compute_offset(_threads_offset, k, vmSymbols::threads_name(), vmSymbols::thread_array_signature());
1013 compute_offset(_groups_offset, k, vmSymbols::groups_name(), vmSymbols::threadgroup_array_signature());
1014 compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature());
1015 compute_offset(_destroyed_offset, k, vmSymbols::destroyed_name(), vmSymbols::bool_signature());
1016 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
1017 compute_offset(_vmAllowSuspension_offset, k, vmSymbols::vmAllowSuspension_name(), vmSymbols::bool_signature());
1018 compute_offset(_nthreads_offset, k, vmSymbols::nthreads_name(), vmSymbols::int_signature());
1019 compute_offset(_ngroups_offset, k, vmSymbols::ngroups_name(), vmSymbols::int_signature());
1020 }
1022 oop java_lang_Throwable::backtrace(oop throwable) {
1023 return throwable->obj_field_acquire(backtrace_offset);
1024 }
1027 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
1028 throwable->release_obj_field_put(backtrace_offset, value);
1029 }
1032 oop java_lang_Throwable::message(oop throwable) {
1033 return throwable->obj_field(detailMessage_offset);
1034 }
1037 oop java_lang_Throwable::message(Handle throwable) {
1038 return throwable->obj_field(detailMessage_offset);
1039 }
1042 void java_lang_Throwable::set_message(oop throwable, oop value) {
1043 throwable->obj_field_put(detailMessage_offset, value);
1044 }
1047 void java_lang_Throwable::clear_stacktrace(oop throwable) {
1048 assert(JDK_Version::is_gte_jdk14x_version(), "should only be called in >= 1.4");
1049 throwable->obj_field_put(stackTrace_offset, NULL);
1050 }
1053 void java_lang_Throwable::print(oop throwable, outputStream* st) {
1054 ResourceMark rm;
1055 klassOop k = throwable->klass();
1056 assert(k != NULL, "just checking");
1057 st->print("%s", instanceKlass::cast(k)->external_name());
1058 oop msg = message(throwable);
1059 if (msg != NULL) {
1060 st->print(": %s", java_lang_String::as_utf8_string(msg));
1061 }
1062 }
1065 void java_lang_Throwable::print(Handle throwable, outputStream* st) {
1066 ResourceMark rm;
1067 klassOop k = throwable->klass();
1068 assert(k != NULL, "just checking");
1069 st->print("%s", instanceKlass::cast(k)->external_name());
1070 oop msg = message(throwable);
1071 if (msg != NULL) {
1072 st->print(": %s", java_lang_String::as_utf8_string(msg));
1073 }
1074 }
1076 // Print stack trace element to resource allocated buffer
1077 char* java_lang_Throwable::print_stack_element_to_buffer(methodOop method, int bci) {
1078 // Get strings and string lengths
1079 instanceKlass* klass = instanceKlass::cast(method->method_holder());
1080 const char* klass_name = klass->external_name();
1081 int buf_len = (int)strlen(klass_name);
1082 char* source_file_name;
1083 if (klass->source_file_name() == NULL) {
1084 source_file_name = NULL;
1085 } else {
1086 source_file_name = klass->source_file_name()->as_C_string();
1087 buf_len += (int)strlen(source_file_name);
1088 }
1089 char* method_name = method->name()->as_C_string();
1090 buf_len += (int)strlen(method_name);
1092 // Allocate temporary buffer with extra space for formatting and line number
1093 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
1095 // Print stack trace line in buffer
1096 sprintf(buf, "\tat %s.%s", klass_name, method_name);
1097 if (method->is_native()) {
1098 strcat(buf, "(Native Method)");
1099 } else {
1100 int line_number = method->line_number_from_bci(bci);
1101 if (source_file_name != NULL && (line_number != -1)) {
1102 // Sourcename and linenumber
1103 sprintf(buf + (int)strlen(buf), "(%s:%d)", source_file_name, line_number);
1104 } else if (source_file_name != NULL) {
1105 // Just sourcename
1106 sprintf(buf + (int)strlen(buf), "(%s)", source_file_name);
1107 } else {
1108 // Neither soucename and linenumber
1109 sprintf(buf + (int)strlen(buf), "(Unknown Source)");
1110 }
1111 nmethod* nm = method->code();
1112 if (WizardMode && nm != NULL) {
1113 sprintf(buf + (int)strlen(buf), "(nmethod " PTR_FORMAT ")", (intptr_t)nm);
1114 }
1115 }
1117 return buf;
1118 }
1121 void java_lang_Throwable::print_stack_element(Handle stream, methodOop method, int bci) {
1122 ResourceMark rm;
1123 char* buf = print_stack_element_to_buffer(method, bci);
1124 print_to_stream(stream, buf);
1125 }
1127 void java_lang_Throwable::print_stack_element(outputStream *st, methodOop method, int bci) {
1128 ResourceMark rm;
1129 char* buf = print_stack_element_to_buffer(method, bci);
1130 st->print_cr("%s", buf);
1131 }
1133 void java_lang_Throwable::print_to_stream(Handle stream, const char* str) {
1134 if (stream.is_null()) {
1135 tty->print_cr("%s", str);
1136 } else {
1137 EXCEPTION_MARK;
1138 JavaValue result(T_VOID);
1139 Handle arg (THREAD, oopFactory::new_charArray(str, THREAD));
1140 if (!HAS_PENDING_EXCEPTION) {
1141 JavaCalls::call_virtual(&result,
1142 stream,
1143 KlassHandle(THREAD, stream->klass()),
1144 vmSymbols::println_name(),
1145 vmSymbols::char_array_void_signature(),
1146 arg,
1147 THREAD);
1148 }
1149 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
1150 if (HAS_PENDING_EXCEPTION) CLEAR_PENDING_EXCEPTION;
1151 }
1153 }
1156 const char* java_lang_Throwable::no_stack_trace_message() {
1157 return "\t<<no stack trace available>>";
1158 }
1161 // Currently used only for exceptions occurring during startup
1162 void java_lang_Throwable::print_stack_trace(oop throwable, outputStream* st) {
1163 Thread *THREAD = Thread::current();
1164 Handle h_throwable(THREAD, throwable);
1165 while (h_throwable.not_null()) {
1166 objArrayHandle result (THREAD, objArrayOop(backtrace(h_throwable())));
1167 if (result.is_null()) {
1168 st->print_cr(no_stack_trace_message());
1169 return;
1170 }
1172 while (result.not_null()) {
1173 objArrayHandle methods (THREAD,
1174 objArrayOop(result->obj_at(trace_methods_offset)));
1175 typeArrayHandle bcis (THREAD,
1176 typeArrayOop(result->obj_at(trace_bcis_offset)));
1178 if (methods.is_null() || bcis.is_null()) {
1179 st->print_cr(no_stack_trace_message());
1180 return;
1181 }
1183 int length = methods()->length();
1184 for (int index = 0; index < length; index++) {
1185 methodOop method = methodOop(methods()->obj_at(index));
1186 if (method == NULL) goto handle_cause;
1187 int bci = bcis->ushort_at(index);
1188 print_stack_element(st, method, bci);
1189 }
1190 result = objArrayHandle(THREAD, objArrayOop(result->obj_at(trace_next_offset)));
1191 }
1192 handle_cause:
1193 {
1194 EXCEPTION_MARK;
1195 JavaValue result(T_OBJECT);
1196 JavaCalls::call_virtual(&result,
1197 h_throwable,
1198 KlassHandle(THREAD, h_throwable->klass()),
1199 vmSymbols::getCause_name(),
1200 vmSymbols::void_throwable_signature(),
1201 THREAD);
1202 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
1203 if (HAS_PENDING_EXCEPTION) {
1204 CLEAR_PENDING_EXCEPTION;
1205 h_throwable = Handle();
1206 } else {
1207 h_throwable = Handle(THREAD, (oop) result.get_jobject());
1208 if (h_throwable.not_null()) {
1209 st->print("Caused by: ");
1210 print(h_throwable, st);
1211 st->cr();
1212 }
1213 }
1214 }
1215 }
1216 }
1219 void java_lang_Throwable::print_stack_trace(oop throwable, oop print_stream) {
1220 // Note: this is no longer used in Merlin, but we support it for compatibility.
1221 Thread *thread = Thread::current();
1222 Handle stream(thread, print_stream);
1223 objArrayHandle result (thread, objArrayOop(backtrace(throwable)));
1224 if (result.is_null()) {
1225 print_to_stream(stream, no_stack_trace_message());
1226 return;
1227 }
1229 while (result.not_null()) {
1230 objArrayHandle methods (thread,
1231 objArrayOop(result->obj_at(trace_methods_offset)));
1232 typeArrayHandle bcis (thread,
1233 typeArrayOop(result->obj_at(trace_bcis_offset)));
1235 if (methods.is_null() || bcis.is_null()) {
1236 print_to_stream(stream, no_stack_trace_message());
1237 return;
1238 }
1240 int length = methods()->length();
1241 for (int index = 0; index < length; index++) {
1242 methodOop method = methodOop(methods()->obj_at(index));
1243 if (method == NULL) return;
1244 int bci = bcis->ushort_at(index);
1245 print_stack_element(stream, method, bci);
1246 }
1247 result = objArrayHandle(thread, objArrayOop(result->obj_at(trace_next_offset)));
1248 }
1249 }
1251 // This class provides a simple wrapper over the internal structure of
1252 // exception backtrace to insulate users of the backtrace from needing
1253 // to know what it looks like.
1254 class BacktraceBuilder: public StackObj {
1255 private:
1256 Handle _backtrace;
1257 objArrayOop _head;
1258 objArrayOop _methods;
1259 typeArrayOop _bcis;
1260 int _index;
1261 No_Safepoint_Verifier _nsv;
1263 public:
1265 enum {
1266 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
1267 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
1268 trace_next_offset = java_lang_Throwable::trace_next_offset,
1269 trace_size = java_lang_Throwable::trace_size,
1270 trace_chunk_size = java_lang_Throwable::trace_chunk_size
1271 };
1273 // constructor for new backtrace
1274 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL) {
1275 expand(CHECK);
1276 _backtrace = _head;
1277 _index = 0;
1278 }
1280 void expand(TRAPS) {
1281 objArrayHandle old_head(THREAD, _head);
1282 Pause_No_Safepoint_Verifier pnsv(&_nsv);
1284 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
1285 objArrayHandle new_head(THREAD, head);
1287 objArrayOop methods = oopFactory::new_objectArray(trace_chunk_size, CHECK);
1288 objArrayHandle new_methods(THREAD, methods);
1290 typeArrayOop bcis = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1291 typeArrayHandle new_bcis(THREAD, bcis);
1293 if (!old_head.is_null()) {
1294 old_head->obj_at_put(trace_next_offset, new_head());
1295 }
1296 new_head->obj_at_put(trace_methods_offset, new_methods());
1297 new_head->obj_at_put(trace_bcis_offset, new_bcis());
1299 _head = new_head();
1300 _methods = new_methods();
1301 _bcis = new_bcis();
1302 _index = 0;
1303 }
1305 oop backtrace() {
1306 return _backtrace();
1307 }
1309 inline void push(methodOop method, short bci, TRAPS) {
1310 if (_index >= trace_chunk_size) {
1311 methodHandle mhandle(THREAD, method);
1312 expand(CHECK);
1313 method = mhandle();
1314 }
1316 _methods->obj_at_put(_index, method);
1317 _bcis->ushort_at_put(_index, bci);
1318 _index++;
1319 }
1321 methodOop current_method() {
1322 assert(_index >= 0 && _index < trace_chunk_size, "out of range");
1323 return methodOop(_methods->obj_at(_index));
1324 }
1326 jushort current_bci() {
1327 assert(_index >= 0 && _index < trace_chunk_size, "out of range");
1328 return _bcis->ushort_at(_index);
1329 }
1330 };
1333 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method, TRAPS) {
1334 if (!StackTraceInThrowable) return;
1335 ResourceMark rm(THREAD);
1337 // Start out by clearing the backtrace for this object, in case the VM
1338 // runs out of memory while allocating the stack trace
1339 set_backtrace(throwable(), NULL);
1340 if (JDK_Version::is_gte_jdk14x_version()) {
1341 // New since 1.4, clear lazily constructed Java level stacktrace if
1342 // refilling occurs
1343 clear_stacktrace(throwable());
1344 }
1346 int max_depth = MaxJavaStackTraceDepth;
1347 JavaThread* thread = (JavaThread*)THREAD;
1348 BacktraceBuilder bt(CHECK);
1350 // If there is no Java frame just return the method that was being called
1351 // with bci 0
1352 if (!thread->has_last_Java_frame()) {
1353 if (max_depth >= 1 && method() != NULL) {
1354 bt.push(method(), 0, CHECK);
1355 set_backtrace(throwable(), bt.backtrace());
1356 }
1357 return;
1358 }
1360 // Instead of using vframe directly, this version of fill_in_stack_trace
1361 // basically handles everything by hand. This significantly improved the
1362 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
1363 // See bug 6333838 for more details.
1364 // The "ASSERT" here is to verify this method generates the exactly same stack
1365 // trace as utilizing vframe.
1366 #ifdef ASSERT
1367 vframeStream st(thread);
1368 methodHandle st_method(THREAD, st.method());
1369 #endif
1370 int total_count = 0;
1371 RegisterMap map(thread, false);
1372 int decode_offset = 0;
1373 nmethod* nm = NULL;
1374 bool skip_fillInStackTrace_check = false;
1375 bool skip_throwableInit_check = false;
1377 for (frame fr = thread->last_frame(); max_depth != total_count;) {
1378 methodOop method = NULL;
1379 int bci = 0;
1381 // Compiled java method case.
1382 if (decode_offset != 0) {
1383 DebugInfoReadStream stream(nm, decode_offset);
1384 decode_offset = stream.read_int();
1385 method = (methodOop)nm->oop_at(stream.read_int());
1386 bci = stream.read_bci();
1387 } else {
1388 if (fr.is_first_frame()) break;
1389 address pc = fr.pc();
1390 if (fr.is_interpreted_frame()) {
1391 intptr_t bcx = fr.interpreter_frame_bcx();
1392 method = fr.interpreter_frame_method();
1393 bci = fr.is_bci(bcx) ? bcx : method->bci_from((address)bcx);
1394 fr = fr.sender(&map);
1395 } else {
1396 CodeBlob* cb = fr.cb();
1397 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
1398 // but non nmethod
1399 fr = fr.sender(&map);
1400 if (cb == NULL || !cb->is_nmethod()) {
1401 continue;
1402 }
1403 nm = (nmethod*)cb;
1404 if (nm->method()->is_native()) {
1405 method = nm->method();
1406 bci = 0;
1407 } else {
1408 PcDesc* pd = nm->pc_desc_at(pc);
1409 decode_offset = pd->scope_decode_offset();
1410 // if decode_offset is not equal to 0, it will execute the
1411 // "compiled java method case" at the beginning of the loop.
1412 continue;
1413 }
1414 }
1415 }
1416 #ifdef ASSERT
1417 assert(st_method() == method && st.bci() == bci,
1418 "Wrong stack trace");
1419 st.next();
1420 // vframeStream::method isn't GC-safe so store off a copy
1421 // of the methodOop in case we GC.
1422 if (!st.at_end()) {
1423 st_method = st.method();
1424 }
1425 #endif
1427 // the format of the stacktrace will be:
1428 // - 1 or more fillInStackTrace frames for the exception class (skipped)
1429 // - 0 or more <init> methods for the exception class (skipped)
1430 // - rest of the stack
1432 if (!skip_fillInStackTrace_check) {
1433 if ((method->name() == vmSymbols::fillInStackTrace_name() ||
1434 method->name() == vmSymbols::fillInStackTrace0_name()) &&
1435 throwable->is_a(method->method_holder())) {
1436 continue;
1437 }
1438 else {
1439 skip_fillInStackTrace_check = true; // gone past them all
1440 }
1441 }
1442 if (!skip_throwableInit_check) {
1443 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
1445 // skip <init> methods of the exception class and superclasses
1446 // This is simlar to classic VM.
1447 if (method->name() == vmSymbols::object_initializer_name() &&
1448 throwable->is_a(method->method_holder())) {
1449 continue;
1450 } else {
1451 // there are none or we've seen them all - either way stop checking
1452 skip_throwableInit_check = true;
1453 }
1454 }
1455 bt.push(method, bci, CHECK);
1456 total_count++;
1457 }
1459 // Put completed stack trace into throwable object
1460 set_backtrace(throwable(), bt.backtrace());
1461 }
1463 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method) {
1464 // No-op if stack trace is disabled
1465 if (!StackTraceInThrowable) {
1466 return;
1467 }
1469 // Disable stack traces for some preallocated out of memory errors
1470 if (!Universe::should_fill_in_stack_trace(throwable)) {
1471 return;
1472 }
1474 PRESERVE_EXCEPTION_MARK;
1476 JavaThread* thread = JavaThread::active();
1477 fill_in_stack_trace(throwable, method, thread);
1478 // ignore exceptions thrown during stack trace filling
1479 CLEAR_PENDING_EXCEPTION;
1480 }
1482 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
1483 // Allocate stack trace - backtrace is created but not filled in
1485 // No-op if stack trace is disabled
1486 if (!StackTraceInThrowable) return;
1488 objArrayOop h_oop = oopFactory::new_objectArray(trace_size, CHECK);
1489 objArrayHandle backtrace (THREAD, h_oop);
1490 objArrayOop m_oop = oopFactory::new_objectArray(trace_chunk_size, CHECK);
1491 objArrayHandle methods (THREAD, m_oop);
1492 typeArrayOop b = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1493 typeArrayHandle bcis(THREAD, b);
1495 // backtrace has space for one chunk (next is NULL)
1496 backtrace->obj_at_put(trace_methods_offset, methods());
1497 backtrace->obj_at_put(trace_bcis_offset, bcis());
1498 set_backtrace(throwable(), backtrace());
1499 }
1502 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
1503 // Fill in stack trace into preallocated backtrace (no GC)
1505 // No-op if stack trace is disabled
1506 if (!StackTraceInThrowable) return;
1508 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
1510 oop backtrace = java_lang_Throwable::backtrace(throwable());
1511 assert(backtrace != NULL, "backtrace not preallocated");
1513 oop m = objArrayOop(backtrace)->obj_at(trace_methods_offset);
1514 objArrayOop methods = objArrayOop(m);
1515 assert(methods != NULL && methods->length() > 0, "method array not preallocated");
1517 oop b = objArrayOop(backtrace)->obj_at(trace_bcis_offset);
1518 typeArrayOop bcis = typeArrayOop(b);
1519 assert(bcis != NULL, "bci array not preallocated");
1521 assert(methods->length() == bcis->length(), "method and bci arrays should match");
1523 JavaThread* thread = JavaThread::current();
1524 ResourceMark rm(thread);
1525 vframeStream st(thread);
1527 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
1528 // methods as preallocated errors aren't created by "java" code.
1530 // fill in as much stack trace as possible
1531 int max_chunks = MIN2(methods->length(), (int)MaxJavaStackTraceDepth);
1532 int chunk_count = 0;
1534 for (;!st.at_end(); st.next()) {
1535 // add element
1536 bcis->ushort_at_put(chunk_count, st.bci());
1537 methods->obj_at_put(chunk_count, st.method());
1539 chunk_count++;
1541 // Bail-out for deep stacks
1542 if (chunk_count >= max_chunks) break;
1543 }
1544 }
1547 int java_lang_Throwable::get_stack_trace_depth(oop throwable, TRAPS) {
1548 if (throwable == NULL) {
1549 THROW_0(vmSymbols::java_lang_NullPointerException());
1550 }
1551 objArrayOop chunk = objArrayOop(backtrace(throwable));
1552 int depth = 0;
1553 if (chunk != NULL) {
1554 // Iterate over chunks and count full ones
1555 while (true) {
1556 objArrayOop next = objArrayOop(chunk->obj_at(trace_next_offset));
1557 if (next == NULL) break;
1558 depth += trace_chunk_size;
1559 chunk = next;
1560 }
1561 assert(chunk != NULL && chunk->obj_at(trace_next_offset) == NULL, "sanity check");
1562 // Count element in remaining partial chunk
1563 objArrayOop methods = objArrayOop(chunk->obj_at(trace_methods_offset));
1564 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1565 assert(methods != NULL && bcis != NULL, "sanity check");
1566 for (int i = 0; i < methods->length(); i++) {
1567 if (methods->obj_at(i) == NULL) break;
1568 depth++;
1569 }
1570 }
1571 return depth;
1572 }
1575 oop java_lang_Throwable::get_stack_trace_element(oop throwable, int index, TRAPS) {
1576 if (throwable == NULL) {
1577 THROW_0(vmSymbols::java_lang_NullPointerException());
1578 }
1579 if (index < 0) {
1580 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1581 }
1582 // Compute how many chunks to skip and index into actual chunk
1583 objArrayOop chunk = objArrayOop(backtrace(throwable));
1584 int skip_chunks = index / trace_chunk_size;
1585 int chunk_index = index % trace_chunk_size;
1586 while (chunk != NULL && skip_chunks > 0) {
1587 chunk = objArrayOop(chunk->obj_at(trace_next_offset));
1588 skip_chunks--;
1589 }
1590 if (chunk == NULL) {
1591 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1592 }
1593 // Get method,bci from chunk
1594 objArrayOop methods = objArrayOop(chunk->obj_at(trace_methods_offset));
1595 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1596 assert(methods != NULL && bcis != NULL, "sanity check");
1597 methodHandle method(THREAD, methodOop(methods->obj_at(chunk_index)));
1598 int bci = bcis->ushort_at(chunk_index);
1599 // Chunk can be partial full
1600 if (method.is_null()) {
1601 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1602 }
1604 oop element = java_lang_StackTraceElement::create(method, bci, CHECK_0);
1605 return element;
1606 }
1608 oop java_lang_StackTraceElement::create(methodHandle method, int bci, TRAPS) {
1609 // SystemDictionary::stackTraceElement_klass() will be null for pre-1.4 JDKs
1610 assert(JDK_Version::is_gte_jdk14x_version(), "should only be called in >= 1.4");
1612 // Allocate java.lang.StackTraceElement instance
1613 klassOop k = SystemDictionary::StackTraceElement_klass();
1614 assert(k != NULL, "must be loaded in 1.4+");
1615 instanceKlassHandle ik (THREAD, k);
1616 if (ik->should_be_initialized()) {
1617 ik->initialize(CHECK_0);
1618 }
1620 Handle element = ik->allocate_instance_handle(CHECK_0);
1621 // Fill in class name
1622 ResourceMark rm(THREAD);
1623 const char* str = instanceKlass::cast(method->method_holder())->external_name();
1624 oop classname = StringTable::intern((char*) str, CHECK_0);
1625 java_lang_StackTraceElement::set_declaringClass(element(), classname);
1626 // Fill in method name
1627 oop methodname = StringTable::intern(method->name(), CHECK_0);
1628 java_lang_StackTraceElement::set_methodName(element(), methodname);
1629 // Fill in source file name
1630 Symbol* source = instanceKlass::cast(method->method_holder())->source_file_name();
1631 oop filename = StringTable::intern(source, CHECK_0);
1632 java_lang_StackTraceElement::set_fileName(element(), filename);
1633 // File in source line number
1634 int line_number;
1635 if (method->is_native()) {
1636 // Negative value different from -1 below, enabling Java code in
1637 // class java.lang.StackTraceElement to distinguish "native" from
1638 // "no LineNumberTable".
1639 line_number = -2;
1640 } else {
1641 // Returns -1 if no LineNumberTable, and otherwise actual line number
1642 line_number = method->line_number_from_bci(bci);
1643 }
1644 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
1646 return element();
1647 }
1650 void java_lang_reflect_AccessibleObject::compute_offsets() {
1651 klassOop k = SystemDictionary::reflect_AccessibleObject_klass();
1652 compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature());
1653 }
1655 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
1656 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1657 return (jboolean) reflect->bool_field(override_offset);
1658 }
1660 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
1661 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1662 reflect->bool_field_put(override_offset, (int) value);
1663 }
1665 void java_lang_reflect_Method::compute_offsets() {
1666 klassOop k = SystemDictionary::reflect_Method_klass();
1667 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
1668 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1669 compute_offset(returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature());
1670 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
1671 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
1672 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
1673 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
1674 // The generic signature and annotations fields are only present in 1.5
1675 signature_offset = -1;
1676 annotations_offset = -1;
1677 parameter_annotations_offset = -1;
1678 annotation_default_offset = -1;
1679 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
1680 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
1681 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
1682 compute_optional_offset(annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature());
1683 }
1685 Handle java_lang_reflect_Method::create(TRAPS) {
1686 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1687 klassOop klass = SystemDictionary::reflect_Method_klass();
1688 // This class is eagerly initialized during VM initialization, since we keep a refence
1689 // to one of the methods
1690 assert(instanceKlass::cast(klass)->is_initialized(), "must be initialized");
1691 return instanceKlass::cast(klass)->allocate_instance_handle(CHECK_NH);
1692 }
1694 oop java_lang_reflect_Method::clazz(oop reflect) {
1695 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1696 return reflect->obj_field(clazz_offset);
1697 }
1699 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
1700 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1701 reflect->obj_field_put(clazz_offset, value);
1702 }
1704 int java_lang_reflect_Method::slot(oop reflect) {
1705 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1706 return reflect->int_field(slot_offset);
1707 }
1709 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
1710 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1711 reflect->int_field_put(slot_offset, value);
1712 }
1714 oop java_lang_reflect_Method::name(oop method) {
1715 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1716 return method->obj_field(name_offset);
1717 }
1719 void java_lang_reflect_Method::set_name(oop method, oop value) {
1720 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1721 method->obj_field_put(name_offset, value);
1722 }
1724 oop java_lang_reflect_Method::return_type(oop method) {
1725 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1726 return method->obj_field(returnType_offset);
1727 }
1729 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
1730 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1731 method->obj_field_put(returnType_offset, value);
1732 }
1734 oop java_lang_reflect_Method::parameter_types(oop method) {
1735 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1736 return method->obj_field(parameterTypes_offset);
1737 }
1739 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
1740 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1741 method->obj_field_put(parameterTypes_offset, value);
1742 }
1744 oop java_lang_reflect_Method::exception_types(oop method) {
1745 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1746 return method->obj_field(exceptionTypes_offset);
1747 }
1749 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
1750 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1751 method->obj_field_put(exceptionTypes_offset, value);
1752 }
1754 int java_lang_reflect_Method::modifiers(oop method) {
1755 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1756 return method->int_field(modifiers_offset);
1757 }
1759 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
1760 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1761 method->int_field_put(modifiers_offset, value);
1762 }
1764 bool java_lang_reflect_Method::has_signature_field() {
1765 return (signature_offset >= 0);
1766 }
1768 oop java_lang_reflect_Method::signature(oop method) {
1769 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1770 assert(has_signature_field(), "signature field must be present");
1771 return method->obj_field(signature_offset);
1772 }
1774 void java_lang_reflect_Method::set_signature(oop method, oop value) {
1775 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1776 assert(has_signature_field(), "signature field must be present");
1777 method->obj_field_put(signature_offset, value);
1778 }
1780 bool java_lang_reflect_Method::has_annotations_field() {
1781 return (annotations_offset >= 0);
1782 }
1784 oop java_lang_reflect_Method::annotations(oop method) {
1785 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1786 assert(has_annotations_field(), "annotations field must be present");
1787 return method->obj_field(annotations_offset);
1788 }
1790 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
1791 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1792 assert(has_annotations_field(), "annotations field must be present");
1793 method->obj_field_put(annotations_offset, value);
1794 }
1796 bool java_lang_reflect_Method::has_parameter_annotations_field() {
1797 return (parameter_annotations_offset >= 0);
1798 }
1800 oop java_lang_reflect_Method::parameter_annotations(oop method) {
1801 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1802 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
1803 return method->obj_field(parameter_annotations_offset);
1804 }
1806 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
1807 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1808 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
1809 method->obj_field_put(parameter_annotations_offset, value);
1810 }
1812 bool java_lang_reflect_Method::has_annotation_default_field() {
1813 return (annotation_default_offset >= 0);
1814 }
1816 oop java_lang_reflect_Method::annotation_default(oop method) {
1817 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1818 assert(has_annotation_default_field(), "annotation default field must be present");
1819 return method->obj_field(annotation_default_offset);
1820 }
1822 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
1823 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1824 assert(has_annotation_default_field(), "annotation default field must be present");
1825 method->obj_field_put(annotation_default_offset, value);
1826 }
1828 void java_lang_reflect_Constructor::compute_offsets() {
1829 klassOop k = SystemDictionary::reflect_Constructor_klass();
1830 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
1831 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
1832 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
1833 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
1834 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
1835 // The generic signature and annotations fields are only present in 1.5
1836 signature_offset = -1;
1837 annotations_offset = -1;
1838 parameter_annotations_offset = -1;
1839 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
1840 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
1841 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
1842 }
1844 Handle java_lang_reflect_Constructor::create(TRAPS) {
1845 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1846 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
1847 klassOop k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
1848 instanceKlassHandle klass (THREAD, k);
1849 // Ensure it is initialized
1850 klass->initialize(CHECK_NH);
1851 return klass->allocate_instance_handle(CHECK_NH);
1852 }
1854 oop java_lang_reflect_Constructor::clazz(oop reflect) {
1855 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1856 return reflect->obj_field(clazz_offset);
1857 }
1859 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
1860 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1861 reflect->obj_field_put(clazz_offset, value);
1862 }
1864 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
1865 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1866 return constructor->obj_field(parameterTypes_offset);
1867 }
1869 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
1870 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1871 constructor->obj_field_put(parameterTypes_offset, value);
1872 }
1874 oop java_lang_reflect_Constructor::exception_types(oop constructor) {
1875 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1876 return constructor->obj_field(exceptionTypes_offset);
1877 }
1879 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
1880 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1881 constructor->obj_field_put(exceptionTypes_offset, value);
1882 }
1884 int java_lang_reflect_Constructor::slot(oop reflect) {
1885 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1886 return reflect->int_field(slot_offset);
1887 }
1889 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
1890 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1891 reflect->int_field_put(slot_offset, value);
1892 }
1894 int java_lang_reflect_Constructor::modifiers(oop constructor) {
1895 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1896 return constructor->int_field(modifiers_offset);
1897 }
1899 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
1900 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1901 constructor->int_field_put(modifiers_offset, value);
1902 }
1904 bool java_lang_reflect_Constructor::has_signature_field() {
1905 return (signature_offset >= 0);
1906 }
1908 oop java_lang_reflect_Constructor::signature(oop constructor) {
1909 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1910 assert(has_signature_field(), "signature field must be present");
1911 return constructor->obj_field(signature_offset);
1912 }
1914 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
1915 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1916 assert(has_signature_field(), "signature field must be present");
1917 constructor->obj_field_put(signature_offset, value);
1918 }
1920 bool java_lang_reflect_Constructor::has_annotations_field() {
1921 return (annotations_offset >= 0);
1922 }
1924 oop java_lang_reflect_Constructor::annotations(oop constructor) {
1925 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1926 assert(has_annotations_field(), "annotations field must be present");
1927 return constructor->obj_field(annotations_offset);
1928 }
1930 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
1931 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1932 assert(has_annotations_field(), "annotations field must be present");
1933 constructor->obj_field_put(annotations_offset, value);
1934 }
1936 bool java_lang_reflect_Constructor::has_parameter_annotations_field() {
1937 return (parameter_annotations_offset >= 0);
1938 }
1940 oop java_lang_reflect_Constructor::parameter_annotations(oop method) {
1941 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1942 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
1943 return method->obj_field(parameter_annotations_offset);
1944 }
1946 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
1947 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1948 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
1949 method->obj_field_put(parameter_annotations_offset, value);
1950 }
1952 void java_lang_reflect_Field::compute_offsets() {
1953 klassOop k = SystemDictionary::reflect_Field_klass();
1954 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
1955 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1956 compute_offset(type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature());
1957 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
1958 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
1959 // The generic signature and annotations fields are only present in 1.5
1960 signature_offset = -1;
1961 annotations_offset = -1;
1962 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
1963 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
1964 }
1966 Handle java_lang_reflect_Field::create(TRAPS) {
1967 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1968 Symbol* name = vmSymbols::java_lang_reflect_Field();
1969 klassOop k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
1970 instanceKlassHandle klass (THREAD, k);
1971 // Ensure it is initialized
1972 klass->initialize(CHECK_NH);
1973 return klass->allocate_instance_handle(CHECK_NH);
1974 }
1976 oop java_lang_reflect_Field::clazz(oop reflect) {
1977 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1978 return reflect->obj_field(clazz_offset);
1979 }
1981 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
1982 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1983 reflect->obj_field_put(clazz_offset, value);
1984 }
1986 oop java_lang_reflect_Field::name(oop field) {
1987 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1988 return field->obj_field(name_offset);
1989 }
1991 void java_lang_reflect_Field::set_name(oop field, oop value) {
1992 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1993 field->obj_field_put(name_offset, value);
1994 }
1996 oop java_lang_reflect_Field::type(oop field) {
1997 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1998 return field->obj_field(type_offset);
1999 }
2001 void java_lang_reflect_Field::set_type(oop field, oop value) {
2002 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2003 field->obj_field_put(type_offset, value);
2004 }
2006 int java_lang_reflect_Field::slot(oop reflect) {
2007 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2008 return reflect->int_field(slot_offset);
2009 }
2011 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
2012 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2013 reflect->int_field_put(slot_offset, value);
2014 }
2016 int java_lang_reflect_Field::modifiers(oop field) {
2017 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2018 return field->int_field(modifiers_offset);
2019 }
2021 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
2022 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2023 field->int_field_put(modifiers_offset, value);
2024 }
2026 bool java_lang_reflect_Field::has_signature_field() {
2027 return (signature_offset >= 0);
2028 }
2030 oop java_lang_reflect_Field::signature(oop field) {
2031 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2032 assert(has_signature_field(), "signature field must be present");
2033 return field->obj_field(signature_offset);
2034 }
2036 void java_lang_reflect_Field::set_signature(oop field, oop value) {
2037 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2038 assert(has_signature_field(), "signature field must be present");
2039 field->obj_field_put(signature_offset, value);
2040 }
2042 bool java_lang_reflect_Field::has_annotations_field() {
2043 return (annotations_offset >= 0);
2044 }
2046 oop java_lang_reflect_Field::annotations(oop field) {
2047 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2048 assert(has_annotations_field(), "annotations field must be present");
2049 return field->obj_field(annotations_offset);
2050 }
2052 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
2053 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2054 assert(has_annotations_field(), "annotations field must be present");
2055 field->obj_field_put(annotations_offset, value);
2056 }
2059 void sun_reflect_ConstantPool::compute_offsets() {
2060 klassOop k = SystemDictionary::reflect_ConstantPool_klass();
2061 // This null test can be removed post beta
2062 if (k != NULL) {
2063 compute_offset(_cp_oop_offset, k, vmSymbols::constantPoolOop_name(), vmSymbols::object_signature());
2064 }
2065 }
2068 Handle sun_reflect_ConstantPool::create(TRAPS) {
2069 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2070 klassOop k = SystemDictionary::reflect_ConstantPool_klass();
2071 instanceKlassHandle klass (THREAD, k);
2072 // Ensure it is initialized
2073 klass->initialize(CHECK_NH);
2074 return klass->allocate_instance_handle(CHECK_NH);
2075 }
2078 oop sun_reflect_ConstantPool::cp_oop(oop reflect) {
2079 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2080 return reflect->obj_field(_cp_oop_offset);
2081 }
2084 void sun_reflect_ConstantPool::set_cp_oop(oop reflect, oop value) {
2085 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2086 reflect->obj_field_put(_cp_oop_offset, value);
2087 }
2089 void sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
2090 klassOop k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass();
2091 // This null test can be removed post beta
2092 if (k != NULL) {
2093 compute_offset(_base_offset, k,
2094 vmSymbols::base_name(), vmSymbols::object_signature());
2095 }
2096 }
2098 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
2099 klassOop k = SystemDictionary::box_klass(type);
2100 if (k == NULL) return NULL;
2101 instanceKlassHandle h (THREAD, k);
2102 if (!h->is_initialized()) h->initialize(CHECK_0);
2103 return h->allocate_instance(THREAD);
2104 }
2107 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
2108 oop box = initialize_and_allocate(type, CHECK_0);
2109 if (box == NULL) return NULL;
2110 switch (type) {
2111 case T_BOOLEAN:
2112 box->bool_field_put(value_offset, value->z);
2113 break;
2114 case T_CHAR:
2115 box->char_field_put(value_offset, value->c);
2116 break;
2117 case T_FLOAT:
2118 box->float_field_put(value_offset, value->f);
2119 break;
2120 case T_DOUBLE:
2121 box->double_field_put(long_value_offset, value->d);
2122 break;
2123 case T_BYTE:
2124 box->byte_field_put(value_offset, value->b);
2125 break;
2126 case T_SHORT:
2127 box->short_field_put(value_offset, value->s);
2128 break;
2129 case T_INT:
2130 box->int_field_put(value_offset, value->i);
2131 break;
2132 case T_LONG:
2133 box->long_field_put(long_value_offset, value->j);
2134 break;
2135 default:
2136 return NULL;
2137 }
2138 return box;
2139 }
2142 BasicType java_lang_boxing_object::basic_type(oop box) {
2143 if (box == NULL) return T_ILLEGAL;
2144 BasicType type = SystemDictionary::box_klass_type(box->klass());
2145 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
2146 return T_ILLEGAL;
2147 return type;
2148 }
2151 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
2152 BasicType type = SystemDictionary::box_klass_type(box->klass());
2153 switch (type) {
2154 case T_BOOLEAN:
2155 value->z = box->bool_field(value_offset);
2156 break;
2157 case T_CHAR:
2158 value->c = box->char_field(value_offset);
2159 break;
2160 case T_FLOAT:
2161 value->f = box->float_field(value_offset);
2162 break;
2163 case T_DOUBLE:
2164 value->d = box->double_field(long_value_offset);
2165 break;
2166 case T_BYTE:
2167 value->b = box->byte_field(value_offset);
2168 break;
2169 case T_SHORT:
2170 value->s = box->short_field(value_offset);
2171 break;
2172 case T_INT:
2173 value->i = box->int_field(value_offset);
2174 break;
2175 case T_LONG:
2176 value->j = box->long_field(long_value_offset);
2177 break;
2178 default:
2179 return T_ILLEGAL;
2180 } // end switch
2181 return type;
2182 }
2185 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
2186 BasicType type = SystemDictionary::box_klass_type(box->klass());
2187 switch (type) {
2188 case T_BOOLEAN:
2189 box->bool_field_put(value_offset, value->z);
2190 break;
2191 case T_CHAR:
2192 box->char_field_put(value_offset, value->c);
2193 break;
2194 case T_FLOAT:
2195 box->float_field_put(value_offset, value->f);
2196 break;
2197 case T_DOUBLE:
2198 box->double_field_put(long_value_offset, value->d);
2199 break;
2200 case T_BYTE:
2201 box->byte_field_put(value_offset, value->b);
2202 break;
2203 case T_SHORT:
2204 box->short_field_put(value_offset, value->s);
2205 break;
2206 case T_INT:
2207 box->int_field_put(value_offset, value->i);
2208 break;
2209 case T_LONG:
2210 box->long_field_put(long_value_offset, value->j);
2211 break;
2212 default:
2213 return T_ILLEGAL;
2214 } // end switch
2215 return type;
2216 }
2219 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
2220 switch (type) {
2221 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
2222 case T_CHAR: st->print("%d", value->c); break;
2223 case T_BYTE: st->print("%d", value->b); break;
2224 case T_SHORT: st->print("%d", value->s); break;
2225 case T_INT: st->print("%d", value->i); break;
2226 case T_LONG: st->print(INT64_FORMAT, value->j); break;
2227 case T_FLOAT: st->print("%f", value->f); break;
2228 case T_DOUBLE: st->print("%lf", value->d); break;
2229 default: st->print("type %d?", type); break;
2230 }
2231 }
2234 // Support for java_lang_ref_Reference
2235 oop java_lang_ref_Reference::pending_list_lock() {
2236 instanceKlass* ik = instanceKlass::cast(SystemDictionary::Reference_klass());
2237 address addr = ik->static_field_addr(static_lock_offset);
2238 if (UseCompressedOops) {
2239 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
2240 } else {
2241 return oopDesc::load_decode_heap_oop((oop*)addr);
2242 }
2243 }
2245 HeapWord *java_lang_ref_Reference::pending_list_addr() {
2246 instanceKlass* ik = instanceKlass::cast(SystemDictionary::Reference_klass());
2247 address addr = ik->static_field_addr(static_pending_offset);
2248 // XXX This might not be HeapWord aligned, almost rather be char *.
2249 return (HeapWord*)addr;
2250 }
2252 oop java_lang_ref_Reference::pending_list() {
2253 char *addr = (char *)pending_list_addr();
2254 if (UseCompressedOops) {
2255 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
2256 } else {
2257 return oopDesc::load_decode_heap_oop((oop*)addr);
2258 }
2259 }
2262 // Support for java_lang_ref_SoftReference
2264 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
2265 return ref->long_field(timestamp_offset);
2266 }
2268 jlong java_lang_ref_SoftReference::clock() {
2269 instanceKlass* ik = instanceKlass::cast(SystemDictionary::SoftReference_klass());
2270 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
2271 return *offset;
2272 }
2274 void java_lang_ref_SoftReference::set_clock(jlong value) {
2275 instanceKlass* ik = instanceKlass::cast(SystemDictionary::SoftReference_klass());
2276 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
2277 *offset = value;
2278 }
2281 // Support for java_lang_invoke_MethodHandle
2283 int java_lang_invoke_MethodHandle::_type_offset;
2284 int java_lang_invoke_MethodHandle::_vmtarget_offset;
2285 int java_lang_invoke_MethodHandle::_vmentry_offset;
2286 int java_lang_invoke_MethodHandle::_vmslots_offset;
2288 int java_lang_invoke_MemberName::_clazz_offset;
2289 int java_lang_invoke_MemberName::_name_offset;
2290 int java_lang_invoke_MemberName::_type_offset;
2291 int java_lang_invoke_MemberName::_flags_offset;
2292 int java_lang_invoke_MemberName::_vmtarget_offset;
2293 int java_lang_invoke_MemberName::_vmindex_offset;
2295 int java_lang_invoke_DirectMethodHandle::_vmindex_offset;
2297 int java_lang_invoke_BoundMethodHandle::_argument_offset;
2298 int java_lang_invoke_BoundMethodHandle::_vmargslot_offset;
2300 int java_lang_invoke_AdapterMethodHandle::_conversion_offset;
2302 void java_lang_invoke_MethodHandle::compute_offsets() {
2303 klassOop k = SystemDictionary::MethodHandle_klass();
2304 if (k != NULL && EnableInvokeDynamic) {
2305 bool allow_super = false;
2306 compute_offset(_type_offset, k, vmSymbols::type_name(), vmSymbols::java_lang_invoke_MethodType_signature(), allow_super);
2307 compute_offset(_vmtarget_offset, k, vmSymbols::vmtarget_name(), vmSymbols::object_signature(), allow_super);
2308 compute_offset(_vmentry_offset, k, vmSymbols::vmentry_name(), vmSymbols::machine_word_signature(), allow_super);
2310 // Note: MH.vmslots (if it is present) is a hoisted copy of MH.type.form.vmslots.
2311 // It is optional pending experiments to keep or toss.
2312 compute_optional_offset(_vmslots_offset, k, vmSymbols::vmslots_name(), vmSymbols::int_signature(), allow_super);
2313 }
2314 }
2316 void java_lang_invoke_MemberName::compute_offsets() {
2317 klassOop k = SystemDictionary::MemberName_klass();
2318 if (k != NULL && EnableInvokeDynamic) {
2319 compute_offset(_clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
2320 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2321 compute_offset(_type_offset, k, vmSymbols::type_name(), vmSymbols::object_signature());
2322 compute_offset(_flags_offset, k, vmSymbols::flags_name(), vmSymbols::int_signature());
2323 compute_offset(_vmtarget_offset, k, vmSymbols::vmtarget_name(), vmSymbols::object_signature());
2324 compute_offset(_vmindex_offset, k, vmSymbols::vmindex_name(), vmSymbols::int_signature());
2325 }
2326 }
2328 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
2329 klassOop k = SystemDictionary::DirectMethodHandle_klass();
2330 if (k != NULL && EnableInvokeDynamic) {
2331 compute_offset(_vmindex_offset, k, vmSymbols::vmindex_name(), vmSymbols::int_signature(), true);
2332 }
2333 }
2335 void java_lang_invoke_BoundMethodHandle::compute_offsets() {
2336 klassOop k = SystemDictionary::BoundMethodHandle_klass();
2337 if (k != NULL && EnableInvokeDynamic) {
2338 compute_offset(_vmargslot_offset, k, vmSymbols::vmargslot_name(), vmSymbols::int_signature(), true);
2339 compute_offset(_argument_offset, k, vmSymbols::argument_name(), vmSymbols::object_signature(), true);
2340 }
2341 }
2343 void java_lang_invoke_AdapterMethodHandle::compute_offsets() {
2344 klassOop k = SystemDictionary::AdapterMethodHandle_klass();
2345 if (k != NULL && EnableInvokeDynamic) {
2346 compute_offset(_conversion_offset, k, vmSymbols::conversion_name(), vmSymbols::int_signature(), true);
2347 }
2348 }
2350 oop java_lang_invoke_MethodHandle::type(oop mh) {
2351 return mh->obj_field(_type_offset);
2352 }
2354 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
2355 mh->obj_field_put(_type_offset, mtype);
2356 }
2358 int java_lang_invoke_MethodHandle::vmslots(oop mh) {
2359 int vmslots_offset = _vmslots_offset;
2360 if (vmslots_offset != 0) {
2361 #ifdef ASSERT
2362 int x = mh->int_field(vmslots_offset);
2363 int y = compute_vmslots(mh);
2364 assert(x == y, "correct hoisted value");
2365 #endif
2366 return mh->int_field(vmslots_offset);
2367 } else {
2368 return compute_vmslots(mh);
2369 }
2370 }
2372 // if MH.vmslots exists, hoist into it the value of type.form.vmslots
2373 void java_lang_invoke_MethodHandle::init_vmslots(oop mh) {
2374 int vmslots_offset = _vmslots_offset;
2375 if (vmslots_offset != 0) {
2376 mh->int_field_put(vmslots_offset, compute_vmslots(mh));
2377 }
2378 }
2380 // fetch type.form.vmslots, which is the number of JVM stack slots
2381 // required to carry the arguments of this MH
2382 int java_lang_invoke_MethodHandle::compute_vmslots(oop mh) {
2383 oop mtype = type(mh);
2384 if (mtype == NULL) return 0; // Java code would get NPE
2385 oop form = java_lang_invoke_MethodType::form(mtype);
2386 if (form == NULL) return 0; // Java code would get NPE
2387 return java_lang_invoke_MethodTypeForm::vmslots(form);
2388 }
2390 // fetch the low-level entry point for this mh
2391 MethodHandleEntry* java_lang_invoke_MethodHandle::vmentry(oop mh) {
2392 return (MethodHandleEntry*) mh->address_field(_vmentry_offset);
2393 }
2395 void java_lang_invoke_MethodHandle::set_vmentry(oop mh, MethodHandleEntry* me) {
2396 assert(_vmentry_offset != 0, "must be present");
2398 // This is always the final step that initializes a valid method handle:
2399 mh->release_address_field_put(_vmentry_offset, (address) me);
2401 // There should be enough memory barriers on exit from native methods
2402 // to ensure that the MH is fully initialized to all threads before
2403 // Java code can publish it in global data structures.
2404 // But just in case, we use release_address_field_put.
2405 }
2407 /// MemberName accessors
2409 oop java_lang_invoke_MemberName::clazz(oop mname) {
2410 assert(is_instance(mname), "wrong type");
2411 return mname->obj_field(_clazz_offset);
2412 }
2414 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
2415 assert(is_instance(mname), "wrong type");
2416 mname->obj_field_put(_clazz_offset, clazz);
2417 }
2419 oop java_lang_invoke_MemberName::name(oop mname) {
2420 assert(is_instance(mname), "wrong type");
2421 return mname->obj_field(_name_offset);
2422 }
2424 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
2425 assert(is_instance(mname), "wrong type");
2426 mname->obj_field_put(_name_offset, name);
2427 }
2429 oop java_lang_invoke_MemberName::type(oop mname) {
2430 assert(is_instance(mname), "wrong type");
2431 return mname->obj_field(_type_offset);
2432 }
2434 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
2435 assert(is_instance(mname), "wrong type");
2436 mname->obj_field_put(_type_offset, type);
2437 }
2439 int java_lang_invoke_MemberName::flags(oop mname) {
2440 assert(is_instance(mname), "wrong type");
2441 return mname->int_field(_flags_offset);
2442 }
2444 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
2445 assert(is_instance(mname), "wrong type");
2446 mname->int_field_put(_flags_offset, flags);
2447 }
2449 oop java_lang_invoke_MemberName::vmtarget(oop mname) {
2450 assert(is_instance(mname), "wrong type");
2451 return mname->obj_field(_vmtarget_offset);
2452 }
2454 void java_lang_invoke_MemberName::set_vmtarget(oop mname, oop ref) {
2455 assert(is_instance(mname), "wrong type");
2456 mname->obj_field_put(_vmtarget_offset, ref);
2457 }
2459 int java_lang_invoke_MemberName::vmindex(oop mname) {
2460 assert(is_instance(mname), "wrong type");
2461 return mname->int_field(_vmindex_offset);
2462 }
2464 void java_lang_invoke_MemberName::set_vmindex(oop mname, int index) {
2465 assert(is_instance(mname), "wrong type");
2466 mname->int_field_put(_vmindex_offset, index);
2467 }
2469 oop java_lang_invoke_MethodHandle::vmtarget(oop mh) {
2470 assert(is_instance(mh), "MH only");
2471 return mh->obj_field(_vmtarget_offset);
2472 }
2474 void java_lang_invoke_MethodHandle::set_vmtarget(oop mh, oop ref) {
2475 assert(is_instance(mh), "MH only");
2476 mh->obj_field_put(_vmtarget_offset, ref);
2477 }
2479 int java_lang_invoke_DirectMethodHandle::vmindex(oop mh) {
2480 assert(is_instance(mh), "DMH only");
2481 return mh->int_field(_vmindex_offset);
2482 }
2484 void java_lang_invoke_DirectMethodHandle::set_vmindex(oop mh, int index) {
2485 assert(is_instance(mh), "DMH only");
2486 mh->int_field_put(_vmindex_offset, index);
2487 }
2489 int java_lang_invoke_BoundMethodHandle::vmargslot(oop mh) {
2490 assert(is_instance(mh), "BMH only");
2491 return mh->int_field(_vmargslot_offset);
2492 }
2494 oop java_lang_invoke_BoundMethodHandle::argument(oop mh) {
2495 assert(is_instance(mh), "BMH only");
2496 return mh->obj_field(_argument_offset);
2497 }
2499 int java_lang_invoke_AdapterMethodHandle::conversion(oop mh) {
2500 assert(is_instance(mh), "AMH only");
2501 return mh->int_field(_conversion_offset);
2502 }
2504 void java_lang_invoke_AdapterMethodHandle::set_conversion(oop mh, int conv) {
2505 assert(is_instance(mh), "AMH only");
2506 mh->int_field_put(_conversion_offset, conv);
2507 }
2510 // Support for java_lang_invoke_MethodType
2512 int java_lang_invoke_MethodType::_rtype_offset;
2513 int java_lang_invoke_MethodType::_ptypes_offset;
2514 int java_lang_invoke_MethodType::_form_offset;
2516 void java_lang_invoke_MethodType::compute_offsets() {
2517 klassOop k = SystemDictionary::MethodType_klass();
2518 if (k != NULL) {
2519 compute_offset(_rtype_offset, k, vmSymbols::rtype_name(), vmSymbols::class_signature());
2520 compute_offset(_ptypes_offset, k, vmSymbols::ptypes_name(), vmSymbols::class_array_signature());
2521 compute_offset(_form_offset, k, vmSymbols::form_name(), vmSymbols::java_lang_invoke_MethodTypeForm_signature());
2522 }
2523 }
2525 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
2526 st->print("(");
2527 objArrayOop pts = ptypes(mt);
2528 for (int i = 0, limit = pts->length(); i < limit; i++) {
2529 java_lang_Class::print_signature(pts->obj_at(i), st);
2530 }
2531 st->print(")");
2532 java_lang_Class::print_signature(rtype(mt), st);
2533 }
2535 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) {
2536 ResourceMark rm;
2537 stringStream buffer(128);
2538 print_signature(mt, &buffer);
2539 const char* sigstr = buffer.base();
2540 int siglen = (int) buffer.size();
2541 Symbol *name;
2542 if (!intern_if_not_found) {
2543 name = SymbolTable::probe(sigstr, siglen);
2544 } else {
2545 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
2546 }
2547 return name;
2548 }
2550 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
2551 if (rtype(mt1) != rtype(mt2))
2552 return false;
2553 if (ptype_count(mt1) != ptype_count(mt2))
2554 return false;
2555 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
2556 if (ptype(mt1, i) != ptype(mt2, i))
2557 return false;
2558 }
2559 return true;
2560 }
2562 oop java_lang_invoke_MethodType::rtype(oop mt) {
2563 assert(is_instance(mt), "must be a MethodType");
2564 return mt->obj_field(_rtype_offset);
2565 }
2567 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
2568 assert(is_instance(mt), "must be a MethodType");
2569 return (objArrayOop) mt->obj_field(_ptypes_offset);
2570 }
2572 oop java_lang_invoke_MethodType::form(oop mt) {
2573 assert(is_instance(mt), "must be a MethodType");
2574 return mt->obj_field(_form_offset);
2575 }
2577 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
2578 return ptypes(mt)->obj_at(idx);
2579 }
2581 int java_lang_invoke_MethodType::ptype_count(oop mt) {
2582 return ptypes(mt)->length();
2583 }
2587 // Support for java_lang_invoke_MethodTypeForm
2589 int java_lang_invoke_MethodTypeForm::_vmslots_offset;
2590 int java_lang_invoke_MethodTypeForm::_vmlayout_offset;
2591 int java_lang_invoke_MethodTypeForm::_erasedType_offset;
2592 int java_lang_invoke_MethodTypeForm::_genericInvoker_offset;
2594 void java_lang_invoke_MethodTypeForm::compute_offsets() {
2595 klassOop k = SystemDictionary::MethodTypeForm_klass();
2596 if (k != NULL) {
2597 compute_optional_offset(_vmslots_offset, k, vmSymbols::vmslots_name(), vmSymbols::int_signature(), true);
2598 compute_optional_offset(_vmlayout_offset, k, vmSymbols::vmlayout_name(), vmSymbols::object_signature());
2599 compute_optional_offset(_erasedType_offset, k, vmSymbols::erasedType_name(), vmSymbols::java_lang_invoke_MethodType_signature(), true);
2600 compute_optional_offset(_genericInvoker_offset, k, vmSymbols::genericInvoker_name(), vmSymbols::java_lang_invoke_MethodHandle_signature(), true);
2601 if (_genericInvoker_offset == 0) _genericInvoker_offset = -1; // set to explicit "empty" value
2602 }
2603 }
2605 int java_lang_invoke_MethodTypeForm::vmslots(oop mtform) {
2606 assert(mtform->klass() == SystemDictionary::MethodTypeForm_klass(), "MTForm only");
2607 assert(_vmslots_offset > 0, "");
2608 return mtform->int_field(_vmslots_offset);
2609 }
2611 oop java_lang_invoke_MethodTypeForm::vmlayout(oop mtform) {
2612 assert(mtform->klass() == SystemDictionary::MethodTypeForm_klass(), "MTForm only");
2613 assert(_vmlayout_offset > 0, "");
2614 return mtform->obj_field(_vmlayout_offset);
2615 }
2617 oop java_lang_invoke_MethodTypeForm::init_vmlayout(oop mtform, oop cookie) {
2618 assert(mtform->klass() == SystemDictionary::MethodTypeForm_klass(), "MTForm only");
2619 oop previous = vmlayout(mtform);
2620 if (previous != NULL) {
2621 return previous; // someone else beat us to it
2622 }
2623 HeapWord* cookie_addr = (HeapWord*) mtform->obj_field_addr<oop>(_vmlayout_offset);
2624 OrderAccess::storestore(); // make sure our copy is fully committed
2625 previous = oopDesc::atomic_compare_exchange_oop(cookie, cookie_addr, previous);
2626 if (previous != NULL) {
2627 return previous; // someone else beat us to it
2628 }
2629 return cookie;
2630 }
2632 oop java_lang_invoke_MethodTypeForm::erasedType(oop mtform) {
2633 assert(mtform->klass() == SystemDictionary::MethodTypeForm_klass(), "MTForm only");
2634 return mtform->obj_field(_erasedType_offset);
2635 }
2637 oop java_lang_invoke_MethodTypeForm::genericInvoker(oop mtform) {
2638 assert(mtform->klass() == SystemDictionary::MethodTypeForm_klass(), "MTForm only");
2639 return mtform->obj_field(_genericInvoker_offset);
2640 }
2643 // Support for java_lang_invoke_CallSite
2645 int java_lang_invoke_CallSite::_target_offset;
2647 void java_lang_invoke_CallSite::compute_offsets() {
2648 if (!EnableInvokeDynamic) return;
2649 klassOop k = SystemDictionary::CallSite_klass();
2650 if (k != NULL) {
2651 compute_offset(_target_offset, k, vmSymbols::target_name(), vmSymbols::java_lang_invoke_MethodHandle_signature());
2652 }
2653 }
2655 oop java_lang_invoke_CallSite::target(oop site) {
2656 return site->obj_field(_target_offset);
2657 }
2659 void java_lang_invoke_CallSite::set_target(oop site, oop target) {
2660 site->obj_field_put(_target_offset, target);
2661 }
2664 // Support for java_security_AccessControlContext
2666 int java_security_AccessControlContext::_context_offset = 0;
2667 int java_security_AccessControlContext::_privilegedContext_offset = 0;
2668 int java_security_AccessControlContext::_isPrivileged_offset = 0;
2670 void java_security_AccessControlContext::compute_offsets() {
2671 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
2672 fieldDescriptor fd;
2673 instanceKlass* ik = instanceKlass::cast(SystemDictionary::AccessControlContext_klass());
2675 if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) {
2676 fatal("Invalid layout of java.security.AccessControlContext");
2677 }
2678 _context_offset = fd.offset();
2680 if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) {
2681 fatal("Invalid layout of java.security.AccessControlContext");
2682 }
2683 _privilegedContext_offset = fd.offset();
2685 if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) {
2686 fatal("Invalid layout of java.security.AccessControlContext");
2687 }
2688 _isPrivileged_offset = fd.offset();
2689 }
2692 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
2693 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
2694 // Ensure klass is initialized
2695 instanceKlass::cast(SystemDictionary::AccessControlContext_klass())->initialize(CHECK_0);
2696 // Allocate result
2697 oop result = instanceKlass::cast(SystemDictionary::AccessControlContext_klass())->allocate_instance(CHECK_0);
2698 // Fill in values
2699 result->obj_field_put(_context_offset, context());
2700 result->obj_field_put(_privilegedContext_offset, privileged_context());
2701 result->bool_field_put(_isPrivileged_offset, isPrivileged);
2702 return result;
2703 }
2706 // Support for java_lang_ClassLoader
2708 oop java_lang_ClassLoader::parent(oop loader) {
2709 assert(loader->is_oop(), "loader must be oop");
2710 return loader->obj_field(parent_offset);
2711 }
2714 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
2715 // Fix for 4474172; see evaluation for more details
2716 loader = non_reflection_class_loader(loader);
2718 oop cl = SystemDictionary::java_system_loader();
2719 while(cl != NULL) {
2720 if (cl == loader) return true;
2721 cl = parent(cl);
2722 }
2723 return false;
2724 }
2726 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
2727 if (loader != NULL) {
2728 // See whether this is one of the class loaders associated with
2729 // the generated bytecodes for reflection, and if so, "magically"
2730 // delegate to its parent to prevent class loading from occurring
2731 // in places where applications using reflection didn't expect it.
2732 klassOop delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass();
2733 // This might be null in non-1.4 JDKs
2734 if (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)) {
2735 return parent(loader);
2736 }
2737 }
2738 return loader;
2739 }
2742 // Support for java_lang_System
2743 int java_lang_System::in_offset_in_bytes() {
2744 return (instanceMirrorKlass::offset_of_static_fields() + static_in_offset);
2745 }
2748 int java_lang_System::out_offset_in_bytes() {
2749 return (instanceMirrorKlass::offset_of_static_fields() + static_out_offset);
2750 }
2753 int java_lang_System::err_offset_in_bytes() {
2754 return (instanceMirrorKlass::offset_of_static_fields() + static_err_offset);
2755 }
2759 int java_lang_String::value_offset;
2760 int java_lang_String::offset_offset;
2761 int java_lang_String::count_offset;
2762 int java_lang_String::hash_offset;
2763 int java_lang_Class::klass_offset;
2764 int java_lang_Class::array_klass_offset;
2765 int java_lang_Class::resolved_constructor_offset;
2766 int java_lang_Class::number_of_fake_oop_fields;
2767 int java_lang_Class::oop_size_offset;
2768 int java_lang_Class::static_oop_field_count_offset;
2769 int java_lang_Throwable::backtrace_offset;
2770 int java_lang_Throwable::detailMessage_offset;
2771 int java_lang_Throwable::cause_offset;
2772 int java_lang_Throwable::stackTrace_offset;
2773 int java_lang_reflect_AccessibleObject::override_offset;
2774 int java_lang_reflect_Method::clazz_offset;
2775 int java_lang_reflect_Method::name_offset;
2776 int java_lang_reflect_Method::returnType_offset;
2777 int java_lang_reflect_Method::parameterTypes_offset;
2778 int java_lang_reflect_Method::exceptionTypes_offset;
2779 int java_lang_reflect_Method::slot_offset;
2780 int java_lang_reflect_Method::modifiers_offset;
2781 int java_lang_reflect_Method::signature_offset;
2782 int java_lang_reflect_Method::annotations_offset;
2783 int java_lang_reflect_Method::parameter_annotations_offset;
2784 int java_lang_reflect_Method::annotation_default_offset;
2785 int java_lang_reflect_Constructor::clazz_offset;
2786 int java_lang_reflect_Constructor::parameterTypes_offset;
2787 int java_lang_reflect_Constructor::exceptionTypes_offset;
2788 int java_lang_reflect_Constructor::slot_offset;
2789 int java_lang_reflect_Constructor::modifiers_offset;
2790 int java_lang_reflect_Constructor::signature_offset;
2791 int java_lang_reflect_Constructor::annotations_offset;
2792 int java_lang_reflect_Constructor::parameter_annotations_offset;
2793 int java_lang_reflect_Field::clazz_offset;
2794 int java_lang_reflect_Field::name_offset;
2795 int java_lang_reflect_Field::type_offset;
2796 int java_lang_reflect_Field::slot_offset;
2797 int java_lang_reflect_Field::modifiers_offset;
2798 int java_lang_reflect_Field::signature_offset;
2799 int java_lang_reflect_Field::annotations_offset;
2800 int java_lang_boxing_object::value_offset;
2801 int java_lang_boxing_object::long_value_offset;
2802 int java_lang_ref_Reference::referent_offset;
2803 int java_lang_ref_Reference::queue_offset;
2804 int java_lang_ref_Reference::next_offset;
2805 int java_lang_ref_Reference::discovered_offset;
2806 int java_lang_ref_Reference::static_lock_offset;
2807 int java_lang_ref_Reference::static_pending_offset;
2808 int java_lang_ref_Reference::number_of_fake_oop_fields;
2809 int java_lang_ref_SoftReference::timestamp_offset;
2810 int java_lang_ref_SoftReference::static_clock_offset;
2811 int java_lang_ClassLoader::parent_offset;
2812 int java_lang_System::static_in_offset;
2813 int java_lang_System::static_out_offset;
2814 int java_lang_System::static_err_offset;
2815 int java_lang_StackTraceElement::declaringClass_offset;
2816 int java_lang_StackTraceElement::methodName_offset;
2817 int java_lang_StackTraceElement::fileName_offset;
2818 int java_lang_StackTraceElement::lineNumber_offset;
2819 int java_lang_AssertionStatusDirectives::classes_offset;
2820 int java_lang_AssertionStatusDirectives::classEnabled_offset;
2821 int java_lang_AssertionStatusDirectives::packages_offset;
2822 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
2823 int java_lang_AssertionStatusDirectives::deflt_offset;
2824 int java_nio_Buffer::_limit_offset;
2825 int sun_misc_AtomicLongCSImpl::_value_offset;
2826 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0;
2827 int sun_reflect_ConstantPool::_cp_oop_offset;
2828 int sun_reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
2831 // Support for java_lang_StackTraceElement
2833 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
2834 element->obj_field_put(fileName_offset, value);
2835 }
2837 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
2838 element->obj_field_put(declaringClass_offset, value);
2839 }
2841 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
2842 element->obj_field_put(methodName_offset, value);
2843 }
2845 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
2846 element->int_field_put(lineNumber_offset, value);
2847 }
2850 // Support for java Assertions - java_lang_AssertionStatusDirectives.
2852 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
2853 o->obj_field_put(classes_offset, val);
2854 }
2856 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
2857 o->obj_field_put(classEnabled_offset, val);
2858 }
2860 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
2861 o->obj_field_put(packages_offset, val);
2862 }
2864 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
2865 o->obj_field_put(packageEnabled_offset, val);
2866 }
2868 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
2869 o->bool_field_put(deflt_offset, val);
2870 }
2873 // Support for intrinsification of java.nio.Buffer.checkIndex
2874 int java_nio_Buffer::limit_offset() {
2875 return _limit_offset;
2876 }
2879 void java_nio_Buffer::compute_offsets() {
2880 klassOop k = SystemDictionary::java_nio_Buffer_klass();
2881 assert(k != NULL, "must be loaded in 1.4+");
2882 compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature());
2883 }
2885 // Support for intrinsification of sun.misc.AtomicLongCSImpl.attemptUpdate
2886 int sun_misc_AtomicLongCSImpl::value_offset() {
2887 assert(SystemDictionary::sun_misc_AtomicLongCSImpl_klass() != NULL, "can't call this");
2888 return _value_offset;
2889 }
2892 void sun_misc_AtomicLongCSImpl::compute_offsets() {
2893 klassOop k = SystemDictionary::sun_misc_AtomicLongCSImpl_klass();
2894 // If this class is not present, its value field offset won't be referenced.
2895 if (k != NULL) {
2896 compute_offset(_value_offset, k, vmSymbols::value_name(), vmSymbols::long_signature());
2897 }
2898 }
2900 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) {
2901 if (_owner_offset != 0) return;
2903 assert(JDK_Version::is_gte_jdk16x_version(), "Must be JDK 1.6 or later");
2904 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK);
2905 klassOop k = SystemDictionary::abstract_ownable_synchronizer_klass();
2906 compute_offset(_owner_offset, k,
2907 vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature());
2908 }
2910 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
2911 assert(_owner_offset != 0, "Must be initialized");
2912 return obj->obj_field(_owner_offset);
2913 }
2915 // Compute hard-coded offsets
2916 // Invoked before SystemDictionary::initialize, so pre-loaded classes
2917 // are not available to determine the offset_of_static_fields.
2918 void JavaClasses::compute_hard_coded_offsets() {
2919 const int x = heapOopSize;
2920 const int header = instanceOopDesc::base_offset_in_bytes();
2922 // Do the String Class
2923 java_lang_String::value_offset = java_lang_String::hc_value_offset * x + header;
2924 java_lang_String::offset_offset = java_lang_String::hc_offset_offset * x + header;
2925 java_lang_String::count_offset = java_lang_String::offset_offset + sizeof (jint);
2926 java_lang_String::hash_offset = java_lang_String::count_offset + sizeof (jint);
2928 {
2929 // Do the Class Class
2930 int offset = header;
2931 java_lang_Class::oop_size_offset = header;
2932 offset += BytesPerInt;
2933 java_lang_Class::static_oop_field_count_offset = offset;
2934 offset = align_size_up(offset + BytesPerInt, x);
2935 java_lang_Class::klass_offset = offset;
2936 offset += x;
2937 java_lang_Class::array_klass_offset = offset;
2938 offset += x;
2939 java_lang_Class::resolved_constructor_offset = offset;
2940 }
2942 // This is NOT an offset
2943 java_lang_Class::number_of_fake_oop_fields = java_lang_Class::hc_number_of_fake_oop_fields;
2945 // Throwable Class
2946 java_lang_Throwable::backtrace_offset = java_lang_Throwable::hc_backtrace_offset * x + header;
2947 java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header;
2948 java_lang_Throwable::cause_offset = java_lang_Throwable::hc_cause_offset * x + header;
2949 java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header;
2951 // java_lang_boxing_object
2952 java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header;
2953 java_lang_boxing_object::long_value_offset = align_size_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong);
2955 // java_lang_ref_Reference:
2956 java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header;
2957 java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header;
2958 java_lang_ref_Reference::next_offset = java_lang_ref_Reference::hc_next_offset * x + header;
2959 java_lang_ref_Reference::discovered_offset = java_lang_ref_Reference::hc_discovered_offset * x + header;
2960 java_lang_ref_Reference::static_lock_offset = java_lang_ref_Reference::hc_static_lock_offset * x;
2961 java_lang_ref_Reference::static_pending_offset = java_lang_ref_Reference::hc_static_pending_offset * x;
2962 // Artificial fields for java_lang_ref_Reference
2963 // The first field is for the discovered field added in 1.4
2964 java_lang_ref_Reference::number_of_fake_oop_fields = 1;
2966 // java_lang_ref_SoftReference Class
2967 java_lang_ref_SoftReference::timestamp_offset = align_size_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong);
2968 // Don't multiply static fields because they are always in wordSize units
2969 java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x;
2971 // java_lang_ClassLoader
2972 java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header;
2974 // java_lang_System
2975 java_lang_System::static_in_offset = java_lang_System::hc_static_in_offset * x;
2976 java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x;
2977 java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x;
2979 // java_lang_StackTraceElement
2980 java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset * x + header;
2981 java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header;
2982 java_lang_StackTraceElement::fileName_offset = java_lang_StackTraceElement::hc_fileName_offset * x + header;
2983 java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header;
2984 java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header;
2985 java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header;
2986 java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header;
2987 java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header;
2988 java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header;
2990 }
2993 // Compute non-hard-coded field offsets of all the classes in this file
2994 void JavaClasses::compute_offsets() {
2996 java_lang_Class::compute_offsets();
2997 java_lang_Thread::compute_offsets();
2998 java_lang_ThreadGroup::compute_offsets();
2999 if (EnableInvokeDynamic) {
3000 java_lang_invoke_MethodHandle::compute_offsets();
3001 java_lang_invoke_MemberName::compute_offsets();
3002 java_lang_invoke_DirectMethodHandle::compute_offsets();
3003 java_lang_invoke_BoundMethodHandle::compute_offsets();
3004 java_lang_invoke_AdapterMethodHandle::compute_offsets();
3005 java_lang_invoke_MethodType::compute_offsets();
3006 java_lang_invoke_MethodTypeForm::compute_offsets();
3007 java_lang_invoke_CallSite::compute_offsets();
3008 }
3009 java_security_AccessControlContext::compute_offsets();
3010 // Initialize reflection classes. The layouts of these classes
3011 // changed with the new reflection implementation in JDK 1.4, and
3012 // since the Universe doesn't know what JDK version it is until this
3013 // point we defer computation of these offsets until now.
3014 java_lang_reflect_AccessibleObject::compute_offsets();
3015 java_lang_reflect_Method::compute_offsets();
3016 java_lang_reflect_Constructor::compute_offsets();
3017 java_lang_reflect_Field::compute_offsets();
3018 if (JDK_Version::is_gte_jdk14x_version()) {
3019 java_nio_Buffer::compute_offsets();
3020 }
3021 if (JDK_Version::is_gte_jdk15x_version()) {
3022 sun_reflect_ConstantPool::compute_offsets();
3023 sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets();
3024 }
3025 sun_misc_AtomicLongCSImpl::compute_offsets();
3027 // generated interpreter code wants to know about the offsets we just computed:
3028 AbstractAssembler::update_delayed_values();
3029 }
3031 #ifndef PRODUCT
3033 // These functions exist to assert the validity of hard-coded field offsets to guard
3034 // against changes in the class files
3036 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
3037 EXCEPTION_MARK;
3038 fieldDescriptor fd;
3039 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3040 klassOop k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3041 instanceKlassHandle h_klass (THREAD, k);
3042 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3043 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3044 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3045 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
3046 return false;
3047 }
3048 if (fd.is_static()) {
3049 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
3050 return false;
3051 }
3052 if (fd.offset() == hardcoded_offset ) {
3053 return true;
3054 } else {
3055 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
3056 klass_name, field_name, hardcoded_offset, fd.offset());
3057 return false;
3058 }
3059 }
3062 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, 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()) {
3075 tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name);
3076 return false;
3077 }
3078 if (fd.offset() == hardcoded_offset + instanceMirrorKlass::offset_of_static_fields()) {
3079 return true;
3080 } else {
3081 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());
3082 return false;
3083 }
3084 }
3087 bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) {
3088 EXCEPTION_MARK;
3089 fieldDescriptor fd;
3090 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3091 klassOop k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3092 instanceKlassHandle h_klass (THREAD, k);
3093 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3094 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3095 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3096 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3097 return false;
3098 }
3099 if (!fd.is_static() || !fd.has_initial_value()) {
3100 tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name);
3101 return false;
3102 }
3103 if (!fd.initial_value_tag().is_int()) {
3104 tty->print_cr("Static field %s.%s is not an int", klass_name, field_name);
3105 return false;
3106 }
3107 jint field_value = fd.int_initial_value();
3108 if (field_value == hardcoded_constant) {
3109 return true;
3110 } else {
3111 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);
3112 return false;
3113 }
3114 }
3117 // Check the hard-coded field offsets of all the classes in this file
3119 void JavaClasses::check_offsets() {
3120 bool valid = true;
3122 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3123 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
3125 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3126 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
3128 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3129 valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig)
3131 #define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \
3132 valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig)
3134 // java.lang.String
3136 CHECK_OFFSET("java/lang/String", java_lang_String, value, "[C");
3137 CHECK_OFFSET("java/lang/String", java_lang_String, offset, "I");
3138 CHECK_OFFSET("java/lang/String", java_lang_String, count, "I");
3139 CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I");
3141 // java.lang.Class
3143 // Fake fields
3144 // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked
3145 // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked
3146 // CHECK_OFFSET("java/lang/Class", java_lang_Class, resolved_constructor); // %%% this needs to be checked
3148 // java.lang.Throwable
3150 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;");
3151 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;");
3152 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, cause, "Ljava/lang/Throwable;");
3153 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;");
3155 // Boxed primitive objects (java_lang_boxing_object)
3157 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
3158 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
3159 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
3160 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
3161 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
3162 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
3163 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
3164 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
3166 // java.lang.ClassLoader
3168 CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent, "Ljava/lang/ClassLoader;");
3170 // java.lang.System
3172 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, in, "Ljava/io/InputStream;");
3173 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;");
3174 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;");
3176 // java.lang.StackTraceElement
3178 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;");
3179 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;");
3180 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, fileName, "Ljava/lang/String;");
3181 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I");
3183 // java.lang.ref.Reference
3185 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
3186 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
3187 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
3188 // Fake field
3189 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
3190 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, lock, "Ljava/lang/ref/Reference$Lock;");
3191 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, pending, "Ljava/lang/ref/Reference;");
3193 // java.lang.ref.SoftReference
3195 CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J");
3196 CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J");
3198 // java.lang.AssertionStatusDirectives
3199 //
3200 // The CheckAssertionStatusDirectives boolean can be removed from here and
3201 // globals.hpp after the AssertionStatusDirectives class has been integrated
3202 // into merlin "for some time." Without it, the vm will fail with early
3203 // merlin builds.
3205 if (CheckAssertionStatusDirectives && JDK_Version::is_gte_jdk14x_version()) {
3206 const char* nm = "java/lang/AssertionStatusDirectives";
3207 const char* sig = "[Ljava/lang/String;";
3208 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig);
3209 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z");
3210 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig);
3211 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z");
3212 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z");
3213 }
3215 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
3216 }
3218 #endif // PRODUCT
3220 void javaClasses_init() {
3221 JavaClasses::compute_offsets();
3222 JavaClasses::check_offsets();
3223 FilteredFieldsMap::initialize(); // must be done after computing offsets.
3224 }