1 /*
2 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/altHashing.hpp"
27 #include "classfile/javaClasses.hpp"
28 #include "classfile/symbolTable.hpp"
29 #include "classfile/vmSymbols.hpp"
30 #include "code/debugInfo.hpp"
31 #include "code/pcDesc.hpp"
32 #include "compiler/compilerOracle.hpp"
33 #include "interpreter/interpreter.hpp"
34 #include "memory/oopFactory.hpp"
35 #include "memory/resourceArea.hpp"
36 #include "memory/universe.inline.hpp"
37 #include "oops/fieldStreams.hpp"
38 #include "oops/instanceKlass.hpp"
39 #include "oops/instanceMirrorKlass.hpp"
40 #include "oops/klass.hpp"
41 #include "oops/method.hpp"
42 #include "oops/symbol.hpp"
43 #include "oops/typeArrayOop.hpp"
44 #include "runtime/fieldDescriptor.hpp"
45 #include "runtime/handles.inline.hpp"
46 #include "runtime/interfaceSupport.hpp"
47 #include "runtime/java.hpp"
48 #include "runtime/javaCalls.hpp"
49 #include "runtime/safepoint.hpp"
50 #include "runtime/thread.inline.hpp"
51 #include "runtime/vframe.hpp"
52 #include "utilities/preserveException.hpp"
53
54 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \
55 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum);
56
57 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \
58 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java },
59
60 InjectedField JavaClasses::_injected_fields[] = {
61 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
62 };
63
64 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
65 return _injected_fields[id].compute_offset();
66 }
67
68
69 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
70 *field_count = 0;
71
72 vmSymbols::SID sid = vmSymbols::find_sid(class_name);
73 if (sid == vmSymbols::NO_SID) {
74 // Only well known classes can inject fields
75 return NULL;
76 }
77
78 int count = 0;
79 int start = -1;
80
81 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
82 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \
83 count++; \
84 if (start == -1) start = klass##_##name##_enum; \
85 }
86 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
87 #undef LOOKUP_INJECTED_FIELD
88
89 if (start != -1) {
90 *field_count = count;
91 return _injected_fields + start;
92 }
93 return NULL;
94 }
95
96
97 static bool find_field(InstanceKlass* ik,
98 Symbol* name_symbol, Symbol* signature_symbol,
99 fieldDescriptor* fd,
100 bool allow_super = false) {
101 if (allow_super)
102 return ik->find_field(name_symbol, signature_symbol, fd) != NULL;
103 else
104 return ik->find_local_field(name_symbol, signature_symbol, fd);
105 }
106
107 // Helpful routine for computing field offsets at run time rather than hardcoding them
108 static void
109 compute_offset(int &dest_offset,
110 Klass* klass_oop, Symbol* name_symbol, Symbol* signature_symbol,
111 bool allow_super = false) {
112 fieldDescriptor fd;
113 InstanceKlass* ik = InstanceKlass::cast(klass_oop);
114 if (!find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) {
115 ResourceMark rm;
116 tty->print_cr("Invalid layout of %s at %s", ik->external_name(), name_symbol->as_C_string());
117 #ifndef PRODUCT
118 klass_oop->print();
119 tty->print_cr("all fields:");
120 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
121 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
122 }
123 #endif //PRODUCT
124 fatal("Invalid layout of preloaded class");
125 }
126 dest_offset = fd.offset();
127 }
128
129 // Same as above but for "optional" offsets that might not be present in certain JDK versions
130 static void
131 compute_optional_offset(int& dest_offset,
132 Klass* klass_oop, Symbol* name_symbol, Symbol* signature_symbol,
133 bool allow_super = false) {
134 fieldDescriptor fd;
135 InstanceKlass* ik = InstanceKlass::cast(klass_oop);
136 if (find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) {
137 dest_offset = fd.offset();
138 }
139 }
140
141
142 int java_lang_String::value_offset = 0;
143 int java_lang_String::offset_offset = 0;
144 int java_lang_String::count_offset = 0;
145 int java_lang_String::hash_offset = 0;
146
147 bool java_lang_String::initialized = false;
148
149 void java_lang_String::compute_offsets() {
150 assert(!initialized, "offsets should be initialized only once");
151
152 Klass* k = SystemDictionary::String_klass();
153 compute_offset(value_offset, k, vmSymbols::value_name(), vmSymbols::char_array_signature());
154 compute_optional_offset(offset_offset, k, vmSymbols::offset_name(), vmSymbols::int_signature());
155 compute_optional_offset(count_offset, k, vmSymbols::count_name(), vmSymbols::int_signature());
156 compute_optional_offset(hash_offset, k, vmSymbols::hash_name(), vmSymbols::int_signature());
157
158 initialized = true;
159 }
160
161 Handle java_lang_String::basic_create(int length, TRAPS) {
162 assert(initialized, "Must be initialized");
163 // Create the String object first, so there's a chance that the String
164 // and the char array it points to end up in the same cache line.
165 oop obj;
166 obj = InstanceKlass::cast(SystemDictionary::String_klass())->allocate_instance(CHECK_NH);
167
168 // Create the char array. The String object must be handlized here
169 // because GC can happen as a result of the allocation attempt.
170 Handle h_obj(THREAD, obj);
171 typeArrayOop buffer;
172 buffer = oopFactory::new_charArray(length, CHECK_NH);
173
174 // Point the String at the char array
175 obj = h_obj();
176 set_value(obj, buffer);
177 // No need to zero the offset, allocation zero'ed the entire String object
178 assert(offset(obj) == 0, "initial String offset should be zero");
179 //set_offset(obj, 0);
180 set_count(obj, length);
181
182 return h_obj;
183 }
184
185 Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) {
186 Handle h_obj = basic_create(length, CHECK_NH);
187 typeArrayOop buffer = value(h_obj());
188 for (int index = 0; index < length; index++) {
189 buffer->char_at_put(index, unicode[index]);
190 }
191 return h_obj;
192 }
193
194 oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) {
195 Handle h_obj = create_from_unicode(unicode, length, CHECK_0);
196 return h_obj();
197 }
198
199 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
200 if (utf8_str == NULL) {
201 return Handle();
202 }
203 int length = UTF8::unicode_length(utf8_str);
204 Handle h_obj = basic_create(length, CHECK_NH);
205 if (length > 0) {
206 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
207 }
208 return h_obj;
209 }
210
211 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
212 Handle h_obj = create_from_str(utf8_str, CHECK_0);
213 return h_obj();
214 }
215
216 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) {
217 int length = UTF8::unicode_length((char*)symbol->bytes(), symbol->utf8_length());
218 Handle h_obj = basic_create(length, CHECK_NH);
219 if (length > 0) {
220 UTF8::convert_to_unicode((char*)symbol->bytes(), value(h_obj())->char_at_addr(0), length);
221 }
222 return h_obj;
223 }
224
225 // Converts a C string to a Java String based on current encoding
226 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
227 assert(str != NULL, "bad arguments");
228
229 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *);
230 static to_java_string_fn_t _to_java_string_fn = NULL;
231
232 if (_to_java_string_fn == NULL) {
233 void *lib_handle = os::native_java_library();
234 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform"));
235 if (_to_java_string_fn == NULL) {
236 fatal("NewStringPlatform missing");
237 }
238 }
239
240 jstring js = NULL;
241 { JavaThread* thread = (JavaThread*)THREAD;
242 assert(thread->is_Java_thread(), "must be java thread");
243 HandleMark hm(thread);
244 ThreadToNativeFromVM ttn(thread);
245 js = (_to_java_string_fn)(thread->jni_environment(), str);
246 }
247 return Handle(THREAD, JNIHandles::resolve(js));
248 }
249
250 // Converts a Java String to a native C string that can be used for
251 // native OS calls.
252 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
253
254 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
255 static to_platform_string_fn_t _to_platform_string_fn = NULL;
256
257 if (_to_platform_string_fn == NULL) {
258 void *lib_handle = os::native_java_library();
259 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
260 if (_to_platform_string_fn == NULL) {
261 fatal("GetStringPlatformChars missing");
262 }
263 }
264
265 char *native_platform_string;
266 { JavaThread* thread = (JavaThread*)THREAD;
267 assert(thread->is_Java_thread(), "must be java thread");
268 JNIEnv *env = thread->jni_environment();
269 jstring js = (jstring) JNIHandles::make_local(env, java_string());
270 bool is_copy;
271 HandleMark hm(thread);
272 ThreadToNativeFromVM ttn(thread);
273 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
274 assert(is_copy == JNI_TRUE, "is_copy value changed");
275 JNIHandles::destroy_local(js);
276 }
277 return native_platform_string;
278 }
279
280 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) {
281 oop obj = java_string();
282 // Typical usage is to convert all '/' to '.' in string.
283 typeArrayOop value = java_lang_String::value(obj);
284 int offset = java_lang_String::offset(obj);
285 int length = java_lang_String::length(obj);
286
287 // First check if any from_char exist
288 int index; // Declared outside, used later
289 for (index = 0; index < length; index++) {
290 if (value->char_at(index + offset) == from_char) {
291 break;
292 }
293 }
294 if (index == length) {
295 // No from_char, so do not copy.
296 return java_string;
297 }
298
299 // Create new UNICODE buffer. Must handlize value because GC
300 // may happen during String and char array creation.
301 typeArrayHandle h_value(THREAD, value);
302 Handle string = basic_create(length, CHECK_NH);
303
304 typeArrayOop from_buffer = h_value();
305 typeArrayOop to_buffer = java_lang_String::value(string());
306
307 // Copy contents
308 for (index = 0; index < length; index++) {
309 jchar c = from_buffer->char_at(index + offset);
310 if (c == from_char) {
311 c = to_char;
312 }
313 to_buffer->char_at_put(index, c);
314 }
315 return string;
316 }
317
318 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
319 typeArrayOop value = java_lang_String::value(java_string);
320 int offset = java_lang_String::offset(java_string);
321 length = java_lang_String::length(java_string);
322
323 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
324 if (result != NULL) {
325 for (int index = 0; index < length; index++) {
326 result[index] = value->char_at(index + offset);
327 }
328 } else {
329 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
330 }
331 return result;
332 }
333
334 unsigned int java_lang_String::hash_code(oop java_string) {
335 int length = java_lang_String::length(java_string);
336 // Zero length string will hash to zero with String.hashCode() function.
337 if (length == 0) return 0;
338
339 typeArrayOop value = java_lang_String::value(java_string);
340 int offset = java_lang_String::offset(java_string);
341 return java_lang_String::hash_code(value->char_at_addr(offset), length);
342 }
343
344 char* java_lang_String::as_quoted_ascii(oop java_string) {
345 typeArrayOop value = java_lang_String::value(java_string);
346 int offset = java_lang_String::offset(java_string);
347 int length = java_lang_String::length(java_string);
348
349 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
350 if (base == NULL) return NULL;
351
352 int result_length = UNICODE::quoted_ascii_length(base, length) + 1;
353 char* result = NEW_RESOURCE_ARRAY(char, result_length);
354 UNICODE::as_quoted_ascii(base, length, result, result_length);
355 assert(result_length >= length + 1, "must not be shorter");
356 assert(result_length == (int)strlen(result) + 1, "must match");
357 return result;
358 }
359
360 unsigned int java_lang_String::hash_string(oop java_string) {
361 int length = java_lang_String::length(java_string);
362 // Zero length string doesn't hash necessarily hash to zero.
363 if (length == 0) {
364 return StringTable::hash_string(NULL, 0);
365 }
366
367 typeArrayOop value = java_lang_String::value(java_string);
368 int offset = java_lang_String::offset(java_string);
369 return StringTable::hash_string(value->char_at_addr(offset), length);
370 }
371
372 Symbol* java_lang_String::as_symbol(Handle java_string, TRAPS) {
373 oop obj = java_string();
374 typeArrayOop value = java_lang_String::value(obj);
375 int offset = java_lang_String::offset(obj);
376 int length = java_lang_String::length(obj);
377 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
378 Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD);
379 return sym;
380 }
381
382 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
383 typeArrayOop value = java_lang_String::value(java_string);
384 int offset = java_lang_String::offset(java_string);
385 int length = java_lang_String::length(java_string);
386 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
387 return SymbolTable::probe_unicode(base, length);
388 }
389
390
391 int java_lang_String::utf8_length(oop java_string) {
392 typeArrayOop value = java_lang_String::value(java_string);
393 int offset = java_lang_String::offset(java_string);
394 int length = java_lang_String::length(java_string);
395 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
396 return UNICODE::utf8_length(position, length);
397 }
398
399 char* java_lang_String::as_utf8_string(oop java_string) {
400 typeArrayOop value = java_lang_String::value(java_string);
401 int offset = java_lang_String::offset(java_string);
402 int length = java_lang_String::length(java_string);
403 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
404 return UNICODE::as_utf8(position, length);
405 }
406
407 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) {
408 typeArrayOop value = java_lang_String::value(java_string);
409 int offset = java_lang_String::offset(java_string);
410 int length = java_lang_String::length(java_string);
411 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
412 return UNICODE::as_utf8(position, length, buf, buflen);
413 }
414
415 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
416 typeArrayOop value = java_lang_String::value(java_string);
417 int offset = java_lang_String::offset(java_string);
418 int length = java_lang_String::length(java_string);
419 assert(start + len <= length, "just checking");
420 jchar* position = value->char_at_addr(offset + start);
421 return UNICODE::as_utf8(position, len);
422 }
423
424 bool java_lang_String::equals(oop java_string, jchar* chars, int len) {
425 assert(java_string->klass() == SystemDictionary::String_klass(),
426 "must be java_string");
427 typeArrayOop value = java_lang_String::value(java_string);
428 int offset = java_lang_String::offset(java_string);
429 int length = java_lang_String::length(java_string);
430 if (length != len) {
431 return false;
432 }
433 for (int i = 0; i < len; i++) {
434 if (value->char_at(i + offset) != chars[i]) {
435 return false;
436 }
437 }
438 return true;
439 }
440
441 bool java_lang_String::equals(oop str1, oop str2) {
442 assert(str1->klass() == SystemDictionary::String_klass(),
443 "must be java String");
444 assert(str2->klass() == SystemDictionary::String_klass(),
445 "must be java String");
446 typeArrayOop value1 = java_lang_String::value(str1);
447 int offset1 = java_lang_String::offset(str1);
448 int length1 = java_lang_String::length(str1);
449 typeArrayOop value2 = java_lang_String::value(str2);
450 int offset2 = java_lang_String::offset(str2);
451 int length2 = java_lang_String::length(str2);
452
453 if (length1 != length2) {
454 return false;
455 }
456 for (int i = 0; i < length1; i++) {
457 if (value1->char_at(i + offset1) != value2->char_at(i + offset2)) {
458 return false;
459 }
460 }
461 return true;
462 }
463
464 void java_lang_String::print(oop java_string, outputStream* st) {
465 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string");
466 typeArrayOop value = java_lang_String::value(java_string);
467
468 if (value == NULL) {
469 // This can happen if, e.g., printing a String
470 // object before its initializer has been called
471 st->print("NULL");
472 return;
473 }
474
475 int offset = java_lang_String::offset(java_string);
476 int length = java_lang_String::length(java_string);
477
478 st->print("\"");
479 for (int index = 0; index < length; index++) {
480 st->print("%c", value->char_at(index + offset));
481 }
482 st->print("\"");
483 }
484
485
486 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
487 assert(mirror.not_null() && fd->is_static(), "just checking");
488 if (fd->has_initial_value()) {
489 BasicType t = fd->field_type();
490 switch (t) {
491 case T_BYTE:
492 mirror()->byte_field_put(fd->offset(), fd->int_initial_value());
493 break;
494 case T_BOOLEAN:
495 mirror()->bool_field_put(fd->offset(), fd->int_initial_value());
496 break;
497 case T_CHAR:
498 mirror()->char_field_put(fd->offset(), fd->int_initial_value());
499 break;
500 case T_SHORT:
501 mirror()->short_field_put(fd->offset(), fd->int_initial_value());
502 break;
503 case T_INT:
504 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
505 break;
506 case T_FLOAT:
507 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
508 break;
509 case T_DOUBLE:
510 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
511 break;
512 case T_LONG:
513 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
514 break;
515 case T_OBJECT:
516 {
517 #ifdef ASSERT
518 TempNewSymbol sym = SymbolTable::new_symbol("Ljava/lang/String;", CHECK);
519 assert(fd->signature() == sym, "just checking");
520 #endif
521 oop string = fd->string_initial_value(CHECK);
522 mirror()->obj_field_put(fd->offset(), string);
523 }
524 break;
525 default:
526 THROW_MSG(vmSymbols::java_lang_ClassFormatError(),
527 "Illegal ConstantValue attribute in class file");
528 }
529 }
530 }
531
532
533 void java_lang_Class::fixup_mirror(KlassHandle k, TRAPS) {
534 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
535
536 // If the offset was read from the shared archive, it was fixed up already
537 if (!k->is_shared()) {
538 if (k->oop_is_instance()) {
539 // During bootstrap, java.lang.Class wasn't loaded so static field
540 // offsets were computed without the size added it. Go back and
541 // update all the static field offsets to included the size.
542 for (JavaFieldStream fs(InstanceKlass::cast(k())); !fs.done(); fs.next()) {
543 if (fs.access_flags().is_static()) {
544 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields();
545 fs.set_offset(real_offset);
546 }
547 }
548 }
549 }
550 create_mirror(k, Handle(NULL), CHECK);
551 }
552
553 void java_lang_Class::initialize_mirror_fields(KlassHandle k,
554 Handle mirror,
555 Handle protection_domain,
556 TRAPS) {
557 // Allocate a simple java object for a lock.
558 // This needs to be a java object because during class initialization
559 // it can be held across a java call.
560 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
561 set_init_lock(mirror(), r);
562
563 // Set protection domain also
564 set_protection_domain(mirror(), protection_domain());
565
566 // Initialize static fields
567 InstanceKlass::cast(k())->do_local_static_fields(&initialize_static_field, mirror, CHECK);
568 }
569
570 void java_lang_Class::create_mirror(KlassHandle k, Handle protection_domain, TRAPS) {
571 assert(k->java_mirror() == NULL, "should only assign mirror once");
572 // Use this moment of initialization to cache modifier_flags also,
573 // to support Class.getModifiers(). Instance classes recalculate
574 // the cached flags after the class file is parsed, but before the
575 // class is put into the system dictionary.
576 int computed_modifiers = k->compute_modifier_flags(CHECK);
577 k->set_modifier_flags(computed_modifiers);
578 // Class_klass has to be loaded because it is used to allocate
579 // the mirror.
580 if (SystemDictionary::Class_klass_loaded()) {
581 // Allocate mirror (java.lang.Class instance)
582 Handle mirror = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK);
583
584 // Setup indirection from mirror->klass
585 if (!k.is_null()) {
586 java_lang_Class::set_klass(mirror(), k());
587 }
588
589 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
590 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
591
592 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
593
594 // It might also have a component mirror. This mirror must already exist.
595 if (k->oop_is_array()) {
596 Handle comp_mirror;
597 if (k->oop_is_typeArray()) {
598 BasicType type = TypeArrayKlass::cast(k())->element_type();
599 comp_mirror = Universe::java_mirror(type);
600 } else {
601 assert(k->oop_is_objArray(), "Must be");
602 Klass* element_klass = ObjArrayKlass::cast(k())->element_klass();
603 assert(element_klass != NULL, "Must have an element klass");
604 comp_mirror = element_klass->java_mirror();
605 }
606 assert(comp_mirror.not_null(), "must have a mirror");
607
608 // Two-way link between the array klass and its component mirror:
609 ArrayKlass::cast(k())->set_component_mirror(comp_mirror());
610 set_array_klass(comp_mirror(), k());
611 } else {
612 assert(k->oop_is_instance(), "Must be");
613
614 initialize_mirror_fields(k, mirror, protection_domain, THREAD);
615 if (HAS_PENDING_EXCEPTION) {
616 // If any of the fields throws an exception like OOM remove the klass field
617 // from the mirror so GC doesn't follow it after the klass has been deallocated.
618 // This mirror looks like a primitive type, which logically it is because it
619 // it represents no class.
620 java_lang_Class::set_klass(mirror(), NULL);
621 return;
622 }
623 }
624
625 // Setup indirection from klass->mirror last
626 // after any exceptions can happen during allocations.
627 if (!k.is_null()) {
628 k->set_java_mirror(mirror());
629 }
630 } else {
631 if (fixup_mirror_list() == NULL) {
632 GrowableArray<Klass*>* list =
633 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true);
634 set_fixup_mirror_list(list);
635 }
636 fixup_mirror_list()->push(k());
637 }
638 }
639
640
641 int java_lang_Class::oop_size(oop java_class) {
642 assert(_oop_size_offset != 0, "must be set");
643 return java_class->int_field(_oop_size_offset);
644 }
645 void java_lang_Class::set_oop_size(oop java_class, int size) {
646 assert(_oop_size_offset != 0, "must be set");
647 java_class->int_field_put(_oop_size_offset, size);
648 }
649 int java_lang_Class::static_oop_field_count(oop java_class) {
650 assert(_static_oop_field_count_offset != 0, "must be set");
651 return java_class->int_field(_static_oop_field_count_offset);
652 }
653 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
654 assert(_static_oop_field_count_offset != 0, "must be set");
655 java_class->int_field_put(_static_oop_field_count_offset, size);
656 }
657
658 oop java_lang_Class::protection_domain(oop java_class) {
659 assert(_protection_domain_offset != 0, "must be set");
660 return java_class->obj_field(_protection_domain_offset);
661 }
662 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
663 assert(_protection_domain_offset != 0, "must be set");
664 java_class->obj_field_put(_protection_domain_offset, pd);
665 }
666
667 oop java_lang_Class::init_lock(oop java_class) {
668 assert(_init_lock_offset != 0, "must be set");
669 return java_class->obj_field(_init_lock_offset);
670 }
671 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
672 assert(_init_lock_offset != 0, "must be set");
673 java_class->obj_field_put(_init_lock_offset, init_lock);
674 }
675
676 objArrayOop java_lang_Class::signers(oop java_class) {
677 assert(_signers_offset != 0, "must be set");
678 return (objArrayOop)java_class->obj_field(_signers_offset);
679 }
680 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) {
681 assert(_signers_offset != 0, "must be set");
682 java_class->obj_field_put(_signers_offset, (oop)signers);
683 }
684
685
686 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
687 // This should be improved by adding a field at the Java level or by
688 // introducing a new VM klass (see comment in ClassFileParser)
689 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0);
690 if (type != T_VOID) {
691 Klass* aklass = Universe::typeArrayKlassObj(type);
692 assert(aklass != NULL, "correct bootstrap");
693 set_array_klass(java_class, aklass);
694 }
695 #ifdef ASSERT
696 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass());
697 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
698 #endif
699 return java_class;
700 }
701
702
703 Klass* java_lang_Class::as_Klass(oop java_class) {
704 //%note memory_2
705 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
706 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset));
707 assert(k == NULL || k->is_klass(), "type check");
708 return k;
709 }
710
711
712 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
713 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
714 java_class->metadata_field_put(_klass_offset, klass);
715 }
716
717
718 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
719 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
720 Symbol* name = NULL;
721 bool is_instance = false;
722 if (is_primitive(java_class)) {
723 name = vmSymbols::type_signature(primitive_type(java_class));
724 } else {
725 Klass* k = as_Klass(java_class);
726 is_instance = k->oop_is_instance();
727 name = k->name();
728 }
729 if (name == NULL) {
730 st->print("<null>");
731 return;
732 }
733 if (is_instance) st->print("L");
734 st->write((char*) name->base(), (int) name->utf8_length());
735 if (is_instance) st->print(";");
736 }
737
738 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) {
739 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
740 Symbol* name;
741 if (is_primitive(java_class)) {
742 name = vmSymbols::type_signature(primitive_type(java_class));
743 // Because this can create a new symbol, the caller has to decrement
744 // the refcount, so make adjustment here and below for symbols returned
745 // that are not created or incremented due to a successful lookup.
746 name->increment_refcount();
747 } else {
748 Klass* k = as_Klass(java_class);
749 if (!k->oop_is_instance()) {
750 name = k->name();
751 name->increment_refcount();
752 } else {
753 ResourceMark rm;
754 const char* sigstr = k->signature_name();
755 int siglen = (int) strlen(sigstr);
756 if (!intern_if_not_found) {
757 name = SymbolTable::probe(sigstr, siglen);
758 } else {
759 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
760 }
761 }
762 }
763 return name;
764 }
765
766
767 Klass* java_lang_Class::array_klass(oop java_class) {
768 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
769 assert(k == NULL || k->is_klass() && k->oop_is_array(), "should be array klass");
770 return k;
771 }
772
773
774 void java_lang_Class::set_array_klass(oop java_class, Klass* klass) {
775 assert(klass->is_klass() && klass->oop_is_array(), "should be array klass");
776 java_class->metadata_field_put(_array_klass_offset, klass);
777 }
778
779
780 bool java_lang_Class::is_primitive(oop java_class) {
781 // should assert:
782 //assert(java_lang_Class::is_instance(java_class), "must be a Class object");
783 bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL);
784
785 #ifdef ASSERT
786 if (is_primitive) {
787 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
788 assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()),
789 "Should be either the T_VOID primitive or a java primitive");
790 }
791 #endif
792
793 return is_primitive;
794 }
795
796
797 BasicType java_lang_Class::primitive_type(oop java_class) {
798 assert(java_lang_Class::is_primitive(java_class), "just checking");
799 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
800 BasicType type = T_VOID;
801 if (ak != NULL) {
802 // Note: create_basic_type_mirror above initializes ak to a non-null value.
803 type = ArrayKlass::cast(ak)->element_type();
804 } else {
805 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
806 }
807 assert(Universe::java_mirror(type) == java_class, "must be consistent");
808 return type;
809 }
810
811 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
812 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
813 if (is_primitive(java_class)) {
814 if (reference_klass != NULL)
815 (*reference_klass) = NULL;
816 return primitive_type(java_class);
817 } else {
818 if (reference_klass != NULL)
819 (*reference_klass) = as_Klass(java_class);
820 return T_OBJECT;
821 }
822 }
823
824
825 oop java_lang_Class::primitive_mirror(BasicType t) {
826 oop mirror = Universe::java_mirror(t);
827 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class");
828 assert(java_lang_Class::is_primitive(mirror), "must be primitive");
829 return mirror;
830 }
831
832 bool java_lang_Class::offsets_computed = false;
833 int java_lang_Class::classRedefinedCount_offset = -1;
834
835 void java_lang_Class::compute_offsets() {
836 assert(!offsets_computed, "offsets should be initialized only once");
837 offsets_computed = true;
838
839 Klass* klass_oop = SystemDictionary::Class_klass();
840 // The classRedefinedCount field is only present starting in 1.5,
841 // so don't go fatal.
842 compute_optional_offset(classRedefinedCount_offset,
843 klass_oop, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature());
844
845 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
846 }
847
848 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
849 if (!JDK_Version::is_gte_jdk15x_version()
850 || classRedefinedCount_offset == -1) {
851 // The classRedefinedCount field is only present starting in 1.5.
852 // If we don't have an offset for it then just return -1 as a marker.
853 return -1;
854 }
855
856 return the_class_mirror->int_field(classRedefinedCount_offset);
857 }
858
859 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
860 if (!JDK_Version::is_gte_jdk15x_version()
861 || classRedefinedCount_offset == -1) {
862 // The classRedefinedCount field is only present starting in 1.5.
863 // If we don't have an offset for it then nothing to set.
864 return;
865 }
866
867 the_class_mirror->int_field_put(classRedefinedCount_offset, value);
868 }
869
870
871 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
872 // platform thread structure, and a eetop offset which was used for thread
873 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
874 // merged, so in the HotSpot VM we just use the eetop field for the thread
875 // instead of the privateInfo_offset.
876 //
877 // Note: The stackSize field is only present starting in 1.4.
878
879 int java_lang_Thread::_name_offset = 0;
880 int java_lang_Thread::_group_offset = 0;
881 int java_lang_Thread::_contextClassLoader_offset = 0;
882 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
883 int java_lang_Thread::_priority_offset = 0;
884 int java_lang_Thread::_eetop_offset = 0;
885 int java_lang_Thread::_daemon_offset = 0;
886 int java_lang_Thread::_stillborn_offset = 0;
887 int java_lang_Thread::_stackSize_offset = 0;
888 int java_lang_Thread::_tid_offset = 0;
889 int java_lang_Thread::_thread_status_offset = 0;
890 int java_lang_Thread::_park_blocker_offset = 0;
891 int java_lang_Thread::_park_event_offset = 0 ;
892
893
894 void java_lang_Thread::compute_offsets() {
895 assert(_group_offset == 0, "offsets should be initialized only once");
896
897 Klass* k = SystemDictionary::Thread_klass();
898 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::char_array_signature());
899 compute_offset(_group_offset, k, vmSymbols::group_name(), vmSymbols::threadgroup_signature());
900 compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature());
901 compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature());
902 compute_offset(_priority_offset, k, vmSymbols::priority_name(), vmSymbols::int_signature());
903 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
904 compute_offset(_eetop_offset, k, vmSymbols::eetop_name(), vmSymbols::long_signature());
905 compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature());
906 // The stackSize field is only present starting in 1.4, so don't go fatal.
907 compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature());
908 // The tid and thread_status fields are only present starting in 1.5, so don't go fatal.
909 compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature());
910 compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature());
911 // The parkBlocker field is only present starting in 1.6, so don't go fatal.
912 compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature());
913 compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(),
914 vmSymbols::long_signature());
915 }
916
917
918 JavaThread* java_lang_Thread::thread(oop java_thread) {
919 return (JavaThread*)java_thread->address_field(_eetop_offset);
920 }
921
922
923 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
924 java_thread->address_field_put(_eetop_offset, (address)thread);
925 }
926
927
928 typeArrayOop java_lang_Thread::name(oop java_thread) {
929 oop name = java_thread->obj_field(_name_offset);
930 assert(name == NULL || (name->is_typeArray() && TypeArrayKlass::cast(name->klass())->element_type() == T_CHAR), "just checking");
931 return typeArrayOop(name);
932 }
933
934
935 void java_lang_Thread::set_name(oop java_thread, typeArrayOop name) {
936 assert(java_thread->obj_field(_name_offset) == NULL, "name should be NULL");
937 java_thread->obj_field_put(_name_offset, name);
938 }
939
940
941 ThreadPriority java_lang_Thread::priority(oop java_thread) {
942 return (ThreadPriority)java_thread->int_field(_priority_offset);
943 }
944
945
946 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
947 java_thread->int_field_put(_priority_offset, priority);
948 }
949
950
951 oop java_lang_Thread::threadGroup(oop java_thread) {
952 return java_thread->obj_field(_group_offset);
953 }
954
955
956 bool java_lang_Thread::is_stillborn(oop java_thread) {
957 return java_thread->bool_field(_stillborn_offset) != 0;
958 }
959
960
961 // We never have reason to turn the stillborn bit off
962 void java_lang_Thread::set_stillborn(oop java_thread) {
963 java_thread->bool_field_put(_stillborn_offset, true);
964 }
965
966
967 bool java_lang_Thread::is_alive(oop java_thread) {
968 JavaThread* thr = java_lang_Thread::thread(java_thread);
969 return (thr != NULL);
970 }
971
972
973 bool java_lang_Thread::is_daemon(oop java_thread) {
974 return java_thread->bool_field(_daemon_offset) != 0;
975 }
976
977
978 void java_lang_Thread::set_daemon(oop java_thread) {
979 java_thread->bool_field_put(_daemon_offset, true);
980 }
981
982 oop java_lang_Thread::context_class_loader(oop java_thread) {
983 return java_thread->obj_field(_contextClassLoader_offset);
984 }
985
986 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
987 return java_thread->obj_field(_inheritedAccessControlContext_offset);
988 }
989
990
991 jlong java_lang_Thread::stackSize(oop java_thread) {
992 // The stackSize field is only present starting in 1.4
993 if (_stackSize_offset > 0) {
994 assert(JDK_Version::is_gte_jdk14x_version(), "sanity check");
995 return java_thread->long_field(_stackSize_offset);
996 } else {
997 return 0;
998 }
999 }
1000
1001 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1002 void java_lang_Thread::set_thread_status(oop java_thread,
1003 java_lang_Thread::ThreadStatus status) {
1004 // The threadStatus is only present starting in 1.5
1005 if (_thread_status_offset > 0) {
1006 java_thread->int_field_put(_thread_status_offset, status);
1007 }
1008 }
1009
1010 // Read thread status value from threadStatus field in java.lang.Thread java class.
1011 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1012 assert(Thread::current()->is_Watcher_thread() || Thread::current()->is_VM_thread() ||
1013 JavaThread::current()->thread_state() == _thread_in_vm,
1014 "Java Thread is not running in vm");
1015 // The threadStatus is only present starting in 1.5
1016 if (_thread_status_offset > 0) {
1017 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1018 } else {
1019 // All we can easily figure out is if it is alive, but that is
1020 // enough info for a valid unknown status.
1021 // These aren't restricted to valid set ThreadStatus values, so
1022 // use JVMTI values and cast.
1023 JavaThread* thr = java_lang_Thread::thread(java_thread);
1024 if (thr == NULL) {
1025 // the thread hasn't run yet or is in the process of exiting
1026 return NEW;
1027 }
1028 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE;
1029 }
1030 }
1031
1032
1033 jlong java_lang_Thread::thread_id(oop java_thread) {
1034 // The thread ID field is only present starting in 1.5
1035 if (_tid_offset > 0) {
1036 return java_thread->long_field(_tid_offset);
1037 } else {
1038 return 0;
1039 }
1040 }
1041
1042 oop java_lang_Thread::park_blocker(oop java_thread) {
1043 assert(JDK_Version::current().supports_thread_park_blocker() &&
1044 _park_blocker_offset != 0, "Must support parkBlocker field");
1045
1046 if (_park_blocker_offset > 0) {
1047 return java_thread->obj_field(_park_blocker_offset);
1048 }
1049
1050 return NULL;
1051 }
1052
1053 jlong java_lang_Thread::park_event(oop java_thread) {
1054 if (_park_event_offset > 0) {
1055 return java_thread->long_field(_park_event_offset);
1056 }
1057 return 0;
1058 }
1059
1060 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) {
1061 if (_park_event_offset > 0) {
1062 java_thread->long_field_put(_park_event_offset, ptr);
1063 return true;
1064 }
1065 return false;
1066 }
1067
1068
1069 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1070 assert(JDK_Version::is_gte_jdk15x_version() && _thread_status_offset != 0, "Must have thread status");
1071 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1072 switch (status) {
1073 case NEW : return "NEW";
1074 case RUNNABLE : return "RUNNABLE";
1075 case SLEEPING : return "TIMED_WAITING (sleeping)";
1076 case IN_OBJECT_WAIT : return "WAITING (on object monitor)";
1077 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
1078 case PARKED : return "WAITING (parking)";
1079 case PARKED_TIMED : return "TIMED_WAITING (parking)";
1080 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1081 case TERMINATED : return "TERMINATED";
1082 default : return "UNKNOWN";
1083 };
1084 }
1085 int java_lang_ThreadGroup::_parent_offset = 0;
1086 int java_lang_ThreadGroup::_name_offset = 0;
1087 int java_lang_ThreadGroup::_threads_offset = 0;
1088 int java_lang_ThreadGroup::_groups_offset = 0;
1089 int java_lang_ThreadGroup::_maxPriority_offset = 0;
1090 int java_lang_ThreadGroup::_destroyed_offset = 0;
1091 int java_lang_ThreadGroup::_daemon_offset = 0;
1092 int java_lang_ThreadGroup::_vmAllowSuspension_offset = 0;
1093 int java_lang_ThreadGroup::_nthreads_offset = 0;
1094 int java_lang_ThreadGroup::_ngroups_offset = 0;
1095
1096 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
1097 assert(java_thread_group->is_oop(), "thread group must be oop");
1098 return java_thread_group->obj_field(_parent_offset);
1099 }
1100
1101 // ("name as oop" accessor is not necessary)
1102
1103 typeArrayOop java_lang_ThreadGroup::name(oop java_thread_group) {
1104 oop name = java_thread_group->obj_field(_name_offset);
1105 // ThreadGroup.name can be null
1106 return name == NULL ? (typeArrayOop)NULL : java_lang_String::value(name);
1107 }
1108
1109 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
1110 assert(java_thread_group->is_oop(), "thread group must be oop");
1111 return java_thread_group->int_field(_nthreads_offset);
1112 }
1113
1114 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
1115 oop threads = java_thread_group->obj_field(_threads_offset);
1116 assert(threads != NULL, "threadgroups should have threads");
1117 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
1118 return objArrayOop(threads);
1119 }
1120
1121 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
1122 assert(java_thread_group->is_oop(), "thread group must be oop");
1123 return java_thread_group->int_field(_ngroups_offset);
1124 }
1125
1126 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
1127 oop groups = java_thread_group->obj_field(_groups_offset);
1128 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
1129 return objArrayOop(groups);
1130 }
1131
1132 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1133 assert(java_thread_group->is_oop(), "thread group must be oop");
1134 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1135 }
1136
1137 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
1138 assert(java_thread_group->is_oop(), "thread group must be oop");
1139 return java_thread_group->bool_field(_destroyed_offset) != 0;
1140 }
1141
1142 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1143 assert(java_thread_group->is_oop(), "thread group must be oop");
1144 return java_thread_group->bool_field(_daemon_offset) != 0;
1145 }
1146
1147 bool java_lang_ThreadGroup::is_vmAllowSuspension(oop java_thread_group) {
1148 assert(java_thread_group->is_oop(), "thread group must be oop");
1149 return java_thread_group->bool_field(_vmAllowSuspension_offset) != 0;
1150 }
1151
1152 void java_lang_ThreadGroup::compute_offsets() {
1153 assert(_parent_offset == 0, "offsets should be initialized only once");
1154
1155 Klass* k = SystemDictionary::ThreadGroup_klass();
1156
1157 compute_offset(_parent_offset, k, vmSymbols::parent_name(), vmSymbols::threadgroup_signature());
1158 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1159 compute_offset(_threads_offset, k, vmSymbols::threads_name(), vmSymbols::thread_array_signature());
1160 compute_offset(_groups_offset, k, vmSymbols::groups_name(), vmSymbols::threadgroup_array_signature());
1161 compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature());
1162 compute_offset(_destroyed_offset, k, vmSymbols::destroyed_name(), vmSymbols::bool_signature());
1163 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
1164 compute_offset(_vmAllowSuspension_offset, k, vmSymbols::vmAllowSuspension_name(), vmSymbols::bool_signature());
1165 compute_offset(_nthreads_offset, k, vmSymbols::nthreads_name(), vmSymbols::int_signature());
1166 compute_offset(_ngroups_offset, k, vmSymbols::ngroups_name(), vmSymbols::int_signature());
1167 }
1168
1169 oop java_lang_Throwable::unassigned_stacktrace() {
1170 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Throwable_klass());
1171 address addr = ik->static_field_addr(static_unassigned_stacktrace_offset);
1172 if (UseCompressedOops) {
1173 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
1174 } else {
1175 return oopDesc::load_decode_heap_oop((oop*)addr);
1176 }
1177 }
1178
1179 oop java_lang_Throwable::backtrace(oop throwable) {
1180 return throwable->obj_field_acquire(backtrace_offset);
1181 }
1182
1183
1184 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
1185 throwable->release_obj_field_put(backtrace_offset, value);
1186 }
1187
1188
1189 oop java_lang_Throwable::message(oop throwable) {
1190 return throwable->obj_field(detailMessage_offset);
1191 }
1192
1193
1194 oop java_lang_Throwable::message(Handle throwable) {
1195 return throwable->obj_field(detailMessage_offset);
1196 }
1197
1198
1199 void java_lang_Throwable::set_message(oop throwable, oop value) {
1200 throwable->obj_field_put(detailMessage_offset, value);
1201 }
1202
1203
1204 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
1205 throwable->obj_field_put(stackTrace_offset, st_element_array);
1206 }
1207
1208 void java_lang_Throwable::clear_stacktrace(oop throwable) {
1209 assert(JDK_Version::is_gte_jdk14x_version(), "should only be called in >= 1.4");
1210 set_stacktrace(throwable, NULL);
1211 }
1212
1213
1214 void java_lang_Throwable::print(oop throwable, outputStream* st) {
1215 ResourceMark rm;
1216 Klass* k = throwable->klass();
1217 assert(k != NULL, "just checking");
1218 st->print("%s", InstanceKlass::cast(k)->external_name());
1219 oop msg = message(throwable);
1220 if (msg != NULL) {
1221 st->print(": %s", java_lang_String::as_utf8_string(msg));
1222 }
1223 }
1224
1225
1226 void java_lang_Throwable::print(Handle throwable, outputStream* st) {
1227 ResourceMark rm;
1228 Klass* k = throwable->klass();
1229 assert(k != NULL, "just checking");
1230 st->print("%s", InstanceKlass::cast(k)->external_name());
1231 oop msg = message(throwable);
1232 if (msg != NULL) {
1233 st->print(": %s", java_lang_String::as_utf8_string(msg));
1234 }
1235 }
1236
1237 // After this many redefines, the stack trace is unreliable.
1238 const int MAX_VERSION = USHRT_MAX;
1239
1240 // Helper backtrace functions to store bci|version together.
1241 static inline int merge_bci_and_version(int bci, int version) {
1242 // only store u2 for version, checking for overflow.
1243 if (version > USHRT_MAX || version < 0) version = MAX_VERSION;
1244 assert((jushort)bci == bci, "bci should be short");
1245 return build_int_from_shorts(version, bci);
1246 }
1247
1248 static inline int bci_at(unsigned int merged) {
1249 return extract_high_short_from_int(merged);
1250 }
1251 static inline int version_at(unsigned int merged) {
1252 return extract_low_short_from_int(merged);
1253 }
1254
1255 static inline bool version_matches(Method* method, int version) {
1256 return (method->constants()->version() == version && version < MAX_VERSION);
1257 }
1258
1259 static inline int get_line_number(Method* method, int bci) {
1260 int line_number = 0;
1261 if (method->is_native()) {
1262 // Negative value different from -1 below, enabling Java code in
1263 // class java.lang.StackTraceElement to distinguish "native" from
1264 // "no LineNumberTable". JDK tests for -2.
1265 line_number = -2;
1266 } else {
1267 // Returns -1 if no LineNumberTable, and otherwise actual line number
1268 line_number = method->line_number_from_bci(bci);
1269 if (line_number == -1 && ShowHiddenFrames) {
1270 line_number = bci + 1000000;
1271 }
1272 }
1273 return line_number;
1274 }
1275
1276 // This class provides a simple wrapper over the internal structure of
1277 // exception backtrace to insulate users of the backtrace from needing
1278 // to know what it looks like.
1279 class BacktraceBuilder: public StackObj {
1280 private:
1281 Handle _backtrace;
1282 objArrayOop _head;
1283 typeArrayOop _methods;
1284 typeArrayOop _bcis;
1285 objArrayOop _mirrors;
1286 int _index;
1287 No_Safepoint_Verifier _nsv;
1288
1289 public:
1290
1291 enum {
1292 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
1293 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
1294 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
1295 trace_next_offset = java_lang_Throwable::trace_next_offset,
1296 trace_size = java_lang_Throwable::trace_size,
1297 trace_chunk_size = java_lang_Throwable::trace_chunk_size
1298 };
1299
1300 // get info out of chunks
1301 static typeArrayOop get_methods(objArrayHandle chunk) {
1302 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
1303 assert(methods != NULL, "method array should be initialized in backtrace");
1304 return methods;
1305 }
1306 static typeArrayOop get_bcis(objArrayHandle chunk) {
1307 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1308 assert(bcis != NULL, "bci array should be initialized in backtrace");
1309 return bcis;
1310 }
1311 static objArrayOop get_mirrors(objArrayHandle chunk) {
1312 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
1313 assert(mirrors != NULL, "mirror array should be initialized in backtrace");
1314 return mirrors;
1315 }
1316
1317 // constructor for new backtrace
1318 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _mirrors(NULL) {
1319 expand(CHECK);
1320 _backtrace = _head;
1321 _index = 0;
1322 }
1323
1324 BacktraceBuilder(objArrayHandle backtrace) {
1325 _methods = get_methods(backtrace);
1326 _bcis = get_bcis(backtrace);
1327 _mirrors = get_mirrors(backtrace);
1328 assert(_methods->length() == _bcis->length() &&
1329 _methods->length() == _mirrors->length(),
1330 "method and source information arrays should match");
1331
1332 // head is the preallocated backtrace
1333 _backtrace = _head = backtrace();
1334 _index = 0;
1335 }
1336
1337 void expand(TRAPS) {
1338 objArrayHandle old_head(THREAD, _head);
1339 Pause_No_Safepoint_Verifier pnsv(&_nsv);
1340
1341 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
1342 objArrayHandle new_head(THREAD, head);
1343
1344 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1345 typeArrayHandle new_methods(THREAD, methods);
1346
1347 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
1348 typeArrayHandle new_bcis(THREAD, bcis);
1349
1350 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
1351 objArrayHandle new_mirrors(THREAD, mirrors);
1352
1353 if (!old_head.is_null()) {
1354 old_head->obj_at_put(trace_next_offset, new_head());
1355 }
1356 new_head->obj_at_put(trace_methods_offset, new_methods());
1357 new_head->obj_at_put(trace_bcis_offset, new_bcis());
1358 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
1359
1360 _head = new_head();
1361 _methods = new_methods();
1362 _bcis = new_bcis();
1363 _mirrors = new_mirrors();
1364 _index = 0;
1365 }
1366
1367 oop backtrace() {
1368 return _backtrace();
1369 }
1370
1371 inline void push(Method* method, int bci, TRAPS) {
1372 // Smear the -1 bci to 0 since the array only holds unsigned
1373 // shorts. The later line number lookup would just smear the -1
1374 // to a 0 even if it could be recorded.
1375 if (bci == SynchronizationEntryBCI) bci = 0;
1376
1377 if (_index >= trace_chunk_size) {
1378 methodHandle mhandle(THREAD, method);
1379 expand(CHECK);
1380 method = mhandle();
1381 }
1382
1383 _methods->short_at_put(_index, method->method_idnum());
1384 _bcis->int_at_put(_index, merge_bci_and_version(bci, method->constants()->version()));
1385
1386 // We need to save the mirrors in the backtrace to keep the class
1387 // from being unloaded while we still have this stack trace.
1388 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror");
1389 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
1390 _index++;
1391 }
1392
1393 };
1394
1395 // Print stack trace element to resource allocated buffer
1396 char* java_lang_Throwable::print_stack_element_to_buffer(Handle mirror,
1397 int method_id, int version, int bci) {
1398
1399 // Get strings and string lengths
1400 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
1401 const char* klass_name = holder->external_name();
1402 int buf_len = (int)strlen(klass_name);
1403
1404 // The method id may point to an obsolete method, can't get more stack information
1405 Method* method = holder->method_with_idnum(method_id);
1406 if (method == NULL) {
1407 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
1408 // This is what the java code prints in this case - added Redefined
1409 sprintf(buf, "\tat %s.null (Redefined)", klass_name);
1410 return buf;
1411 }
1412
1413 char* method_name = method->name()->as_C_string();
1414 buf_len += (int)strlen(method_name);
1415
1416 char* source_file_name = NULL;
1417 if (version_matches(method, version)) {
1418 Symbol* source = holder->source_file_name();
1419 if (source != NULL) {
1420 source_file_name = source->as_C_string();
1421 buf_len += (int)strlen(source_file_name);
1422 }
1423 }
1424
1425 // Allocate temporary buffer with extra space for formatting and line number
1426 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
1427
1428 // Print stack trace line in buffer
1429 sprintf(buf, "\tat %s.%s", klass_name, method_name);
1430
1431 if (!version_matches(method, version)) {
1432 strcat(buf, "(Redefined)");
1433 } else {
1434 int line_number = get_line_number(method, bci);
1435 if (line_number == -2) {
1436 strcat(buf, "(Native Method)");
1437 } else {
1438 if (source_file_name != NULL && (line_number != -1)) {
1439 // Sourcename and linenumber
1440 sprintf(buf + (int)strlen(buf), "(%s:%d)", source_file_name, line_number);
1441 } else if (source_file_name != NULL) {
1442 // Just sourcename
1443 sprintf(buf + (int)strlen(buf), "(%s)", source_file_name);
1444 } else {
1445 // Neither sourcename nor linenumber
1446 sprintf(buf + (int)strlen(buf), "(Unknown Source)");
1447 }
1448 nmethod* nm = method->code();
1449 if (WizardMode && nm != NULL) {
1450 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
1451 }
1452 }
1453 }
1454
1455 return buf;
1456 }
1457
1458 void java_lang_Throwable::print_stack_element(outputStream *st, Handle mirror,
1459 int method_id, int version, int bci) {
1460 ResourceMark rm;
1461 char* buf = print_stack_element_to_buffer(mirror, method_id, version, bci);
1462 st->print_cr("%s", buf);
1463 }
1464
1465 void java_lang_Throwable::print_stack_element(outputStream *st, methodHandle method, int bci) {
1466 Handle mirror = method->method_holder()->java_mirror();
1467 int method_id = method->method_idnum();
1468 int version = method->constants()->version();
1469 print_stack_element(st, mirror, method_id, version, bci);
1470 }
1471
1472 const char* java_lang_Throwable::no_stack_trace_message() {
1473 return "\t<<no stack trace available>>";
1474 }
1475
1476
1477 // Currently used only for exceptions occurring during startup
1478 void java_lang_Throwable::print_stack_trace(oop throwable, outputStream* st) {
1479 Thread *THREAD = Thread::current();
1480 Handle h_throwable(THREAD, throwable);
1481 while (h_throwable.not_null()) {
1482 objArrayHandle result (THREAD, objArrayOop(backtrace(h_throwable())));
1483 if (result.is_null()) {
1484 st->print_cr(no_stack_trace_message());
1485 return;
1486 }
1487
1488 while (result.not_null()) {
1489
1490 // Get method id, bci, version and mirror from chunk
1491 typeArrayHandle methods (THREAD, BacktraceBuilder::get_methods(result));
1492 typeArrayHandle bcis (THREAD, BacktraceBuilder::get_bcis(result));
1493 objArrayHandle mirrors (THREAD, BacktraceBuilder::get_mirrors(result));
1494
1495 int length = methods()->length();
1496 for (int index = 0; index < length; index++) {
1497 Handle mirror(THREAD, mirrors->obj_at(index));
1498 // NULL mirror means end of stack trace
1499 if (mirror.is_null()) goto handle_cause;
1500 int method = methods->short_at(index);
1501 int version = version_at(bcis->int_at(index));
1502 int bci = bci_at(bcis->int_at(index));
1503 print_stack_element(st, mirror, method, version, bci);
1504 }
1505 result = objArrayHandle(THREAD, objArrayOop(result->obj_at(trace_next_offset)));
1506 }
1507 handle_cause:
1508 {
1509 EXCEPTION_MARK;
1510 JavaValue cause(T_OBJECT);
1511 JavaCalls::call_virtual(&cause,
1512 h_throwable,
1513 KlassHandle(THREAD, h_throwable->klass()),
1514 vmSymbols::getCause_name(),
1515 vmSymbols::void_throwable_signature(),
1516 THREAD);
1517 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
1518 if (HAS_PENDING_EXCEPTION) {
1519 CLEAR_PENDING_EXCEPTION;
1520 h_throwable = Handle();
1521 } else {
1522 h_throwable = Handle(THREAD, (oop) cause.get_jobject());
1523 if (h_throwable.not_null()) {
1524 st->print("Caused by: ");
1525 print(h_throwable, st);
1526 st->cr();
1527 }
1528 }
1529 }
1530 }
1531 }
1532
1533 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method, TRAPS) {
1534 if (!StackTraceInThrowable) return;
1535 ResourceMark rm(THREAD);
1536
1537 // Start out by clearing the backtrace for this object, in case the VM
1538 // runs out of memory while allocating the stack trace
1539 set_backtrace(throwable(), NULL);
1540 if (JDK_Version::is_gte_jdk14x_version()) {
1541 // New since 1.4, clear lazily constructed Java level stacktrace if
1542 // refilling occurs
1543 // This is unnecessary in 1.7+ but harmless
1544 clear_stacktrace(throwable());
1545 }
1546
1547 int max_depth = MaxJavaStackTraceDepth;
1548 JavaThread* thread = (JavaThread*)THREAD;
1549 BacktraceBuilder bt(CHECK);
1550
1551 // If there is no Java frame just return the method that was being called
1552 // with bci 0
1553 if (!thread->has_last_Java_frame()) {
1554 if (max_depth >= 1 && method() != NULL) {
1555 bt.push(method(), 0, CHECK);
1556 set_backtrace(throwable(), bt.backtrace());
1557 }
1558 return;
1559 }
1560
1561 // Instead of using vframe directly, this version of fill_in_stack_trace
1562 // basically handles everything by hand. This significantly improved the
1563 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
1564 // See bug 6333838 for more details.
1565 // The "ASSERT" here is to verify this method generates the exactly same stack
1566 // trace as utilizing vframe.
1567 #ifdef ASSERT
1568 vframeStream st(thread);
1569 methodHandle st_method(THREAD, st.method());
1570 #endif
1571 int total_count = 0;
1572 RegisterMap map(thread, false);
1573 int decode_offset = 0;
1574 nmethod* nm = NULL;
1575 bool skip_fillInStackTrace_check = false;
1576 bool skip_throwableInit_check = false;
1577 bool skip_hidden = !ShowHiddenFrames;
1578
1579 for (frame fr = thread->last_frame(); max_depth != total_count;) {
1580 Method* method = NULL;
1581 int bci = 0;
1582
1583 // Compiled java method case.
1584 if (decode_offset != 0) {
1585 DebugInfoReadStream stream(nm, decode_offset);
1586 decode_offset = stream.read_int();
1587 method = (Method*)nm->metadata_at(stream.read_int());
1588 bci = stream.read_bci();
1589 } else {
1590 if (fr.is_first_frame()) break;
1591 address pc = fr.pc();
1592 if (fr.is_interpreted_frame()) {
1593 intptr_t bcx = fr.interpreter_frame_bcx();
1594 method = fr.interpreter_frame_method();
1595 bci = fr.is_bci(bcx) ? bcx : method->bci_from((address)bcx);
1596 fr = fr.sender(&map);
1597 } else {
1598 CodeBlob* cb = fr.cb();
1599 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
1600 // but non nmethod
1601 fr = fr.sender(&map);
1602 if (cb == NULL || !cb->is_nmethod()) {
1603 continue;
1604 }
1605 nm = (nmethod*)cb;
1606 if (nm->method()->is_native()) {
1607 method = nm->method();
1608 bci = 0;
1609 } else {
1610 PcDesc* pd = nm->pc_desc_at(pc);
1611 decode_offset = pd->scope_decode_offset();
1612 // if decode_offset is not equal to 0, it will execute the
1613 // "compiled java method case" at the beginning of the loop.
1614 continue;
1615 }
1616 }
1617 }
1618 #ifdef ASSERT
1619 assert(st_method() == method && st.bci() == bci,
1620 "Wrong stack trace");
1621 st.next();
1622 // vframeStream::method isn't GC-safe so store off a copy
1623 // of the Method* in case we GC.
1624 if (!st.at_end()) {
1625 st_method = st.method();
1626 }
1627 #endif
1628
1629 // the format of the stacktrace will be:
1630 // - 1 or more fillInStackTrace frames for the exception class (skipped)
1631 // - 0 or more <init> methods for the exception class (skipped)
1632 // - rest of the stack
1633
1634 if (!skip_fillInStackTrace_check) {
1635 if ((method->name() == vmSymbols::fillInStackTrace_name() ||
1636 method->name() == vmSymbols::fillInStackTrace0_name()) &&
1637 throwable->is_a(method->method_holder())) {
1638 continue;
1639 }
1640 else {
1641 skip_fillInStackTrace_check = true; // gone past them all
1642 }
1643 }
1644 if (!skip_throwableInit_check) {
1645 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
1646
1647 // skip <init> methods of the exception class and superclasses
1648 // This is simlar to classic VM.
1649 if (method->name() == vmSymbols::object_initializer_name() &&
1650 throwable->is_a(method->method_holder())) {
1651 continue;
1652 } else {
1653 // there are none or we've seen them all - either way stop checking
1654 skip_throwableInit_check = true;
1655 }
1656 }
1657 if (method->is_hidden()) {
1658 if (skip_hidden) continue;
1659 }
1660 bt.push(method, bci, CHECK);
1661 total_count++;
1662 }
1663
1664 // Put completed stack trace into throwable object
1665 set_backtrace(throwable(), bt.backtrace());
1666 }
1667
1668 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method) {
1669 // No-op if stack trace is disabled
1670 if (!StackTraceInThrowable) {
1671 return;
1672 }
1673
1674 // Disable stack traces for some preallocated out of memory errors
1675 if (!Universe::should_fill_in_stack_trace(throwable)) {
1676 return;
1677 }
1678
1679 PRESERVE_EXCEPTION_MARK;
1680
1681 JavaThread* thread = JavaThread::active();
1682 fill_in_stack_trace(throwable, method, thread);
1683 // ignore exceptions thrown during stack trace filling
1684 CLEAR_PENDING_EXCEPTION;
1685 }
1686
1687 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
1688 // Allocate stack trace - backtrace is created but not filled in
1689
1690 // No-op if stack trace is disabled
1691 if (!StackTraceInThrowable) return;
1692 BacktraceBuilder bt(CHECK); // creates a backtrace
1693 set_backtrace(throwable(), bt.backtrace());
1694 }
1695
1696
1697 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
1698 // Fill in stack trace into preallocated backtrace (no GC)
1699
1700 // No-op if stack trace is disabled
1701 if (!StackTraceInThrowable) return;
1702
1703 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
1704
1705 JavaThread* THREAD = JavaThread::current();
1706
1707 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
1708 assert(backtrace.not_null(), "backtrace should have been preallocated");
1709
1710 ResourceMark rm(THREAD);
1711 vframeStream st(THREAD);
1712
1713 BacktraceBuilder bt(backtrace);
1714
1715 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
1716 // methods as preallocated errors aren't created by "java" code.
1717
1718 // fill in as much stack trace as possible
1719 typeArrayOop methods = BacktraceBuilder::get_methods(backtrace);
1720 int max_chunks = MIN2(methods->length(), (int)MaxJavaStackTraceDepth);
1721 int chunk_count = 0;
1722
1723 for (;!st.at_end(); st.next()) {
1724 bt.push(st.method(), st.bci(), CHECK);
1725 chunk_count++;
1726
1727 // Bail-out for deep stacks
1728 if (chunk_count >= max_chunks) break;
1729 }
1730
1731 // For Java 7+ we support the Throwable immutability protocol defined for Java 7. This support
1732 // was missing in 7u0 so in 7u0 there is a workaround in the Throwable class. That workaround
1733 // can be removed in a JDK using this JVM version
1734 if (JDK_Version::is_gte_jdk17x_version()) {
1735 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
1736 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized");
1737 }
1738 }
1739
1740
1741 int java_lang_Throwable::get_stack_trace_depth(oop throwable, TRAPS) {
1742 if (throwable == NULL) {
1743 THROW_0(vmSymbols::java_lang_NullPointerException());
1744 }
1745 objArrayOop chunk = objArrayOop(backtrace(throwable));
1746 int depth = 0;
1747 if (chunk != NULL) {
1748 // Iterate over chunks and count full ones
1749 while (true) {
1750 objArrayOop next = objArrayOop(chunk->obj_at(trace_next_offset));
1751 if (next == NULL) break;
1752 depth += trace_chunk_size;
1753 chunk = next;
1754 }
1755 assert(chunk != NULL && chunk->obj_at(trace_next_offset) == NULL, "sanity check");
1756 // Count element in remaining partial chunk. NULL value for mirror
1757 // marks the end of the stack trace elements that are saved.
1758 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk);
1759 assert(mirrors != NULL, "sanity check");
1760 for (int i = 0; i < mirrors->length(); i++) {
1761 if (mirrors->obj_at(i) == NULL) break;
1762 depth++;
1763 }
1764 }
1765 return depth;
1766 }
1767
1768
1769 oop java_lang_Throwable::get_stack_trace_element(oop throwable, int index, TRAPS) {
1770 if (throwable == NULL) {
1771 THROW_0(vmSymbols::java_lang_NullPointerException());
1772 }
1773 if (index < 0) {
1774 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1775 }
1776 // Compute how many chunks to skip and index into actual chunk
1777 objArrayOop chunk = objArrayOop(backtrace(throwable));
1778 int skip_chunks = index / trace_chunk_size;
1779 int chunk_index = index % trace_chunk_size;
1780 while (chunk != NULL && skip_chunks > 0) {
1781 chunk = objArrayOop(chunk->obj_at(trace_next_offset));
1782 skip_chunks--;
1783 }
1784 if (chunk == NULL) {
1785 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1786 }
1787 // Get method id, bci, version and mirror from chunk
1788 typeArrayOop methods = BacktraceBuilder::get_methods(chunk);
1789 typeArrayOop bcis = BacktraceBuilder::get_bcis(chunk);
1790 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk);
1791
1792 assert(methods != NULL && bcis != NULL && mirrors != NULL, "sanity check");
1793
1794 int method = methods->short_at(chunk_index);
1795 int version = version_at(bcis->int_at(chunk_index));
1796 int bci = bci_at(bcis->int_at(chunk_index));
1797 Handle mirror(THREAD, mirrors->obj_at(chunk_index));
1798
1799 // Chunk can be partial full
1800 if (mirror.is_null()) {
1801 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1802 }
1803
1804 oop element = java_lang_StackTraceElement::create(mirror, method, version, bci, CHECK_0);
1805 return element;
1806 }
1807
1808 oop java_lang_StackTraceElement::create(Handle mirror, int method_id,
1809 int version, int bci, TRAPS) {
1810 // Allocate java.lang.StackTraceElement instance
1811 Klass* k = SystemDictionary::StackTraceElement_klass();
1812 assert(k != NULL, "must be loaded in 1.4+");
1813 instanceKlassHandle ik (THREAD, k);
1814 if (ik->should_be_initialized()) {
1815 ik->initialize(CHECK_0);
1816 }
1817
1818 Handle element = ik->allocate_instance_handle(CHECK_0);
1819 // Fill in class name
1820 ResourceMark rm(THREAD);
1821 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
1822 const char* str = holder->external_name();
1823 oop classname = StringTable::intern((char*) str, CHECK_0);
1824 java_lang_StackTraceElement::set_declaringClass(element(), classname);
1825
1826 Method* method = holder->method_with_idnum(method_id);
1827 // Method on stack may be obsolete because it was redefined so cannot be
1828 // found by idnum.
1829 if (method == NULL) {
1830 // leave name and fileName null
1831 java_lang_StackTraceElement::set_lineNumber(element(), -1);
1832 return element();
1833 }
1834
1835 // Fill in method name
1836 oop methodname = StringTable::intern(method->name(), CHECK_0);
1837 java_lang_StackTraceElement::set_methodName(element(), methodname);
1838
1839 if (!version_matches(method, version)) {
1840 // The method was redefined, accurate line number information isn't available
1841 java_lang_StackTraceElement::set_fileName(element(), NULL);
1842 java_lang_StackTraceElement::set_lineNumber(element(), -1);
1843 } else {
1844 // Fill in source file name and line number.
1845 Symbol* source = holder->source_file_name();
1846 if (ShowHiddenFrames && source == NULL)
1847 source = vmSymbols::unknown_class_name();
1848 oop filename = StringTable::intern(source, CHECK_0);
1849 java_lang_StackTraceElement::set_fileName(element(), filename);
1850
1851 int line_number = get_line_number(method, bci);
1852 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
1853 }
1854 return element();
1855 }
1856
1857 oop java_lang_StackTraceElement::create(methodHandle method, int bci, TRAPS) {
1858 Handle mirror (THREAD, method->method_holder()->java_mirror());
1859 int method_id = method->method_idnum();
1860 return create(mirror, method_id, method->constants()->version(), bci, THREAD);
1861 }
1862
1863 void java_lang_reflect_AccessibleObject::compute_offsets() {
1864 Klass* k = SystemDictionary::reflect_AccessibleObject_klass();
1865 compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature());
1866 }
1867
1868 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
1869 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1870 return (jboolean) reflect->bool_field(override_offset);
1871 }
1872
1873 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
1874 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1875 reflect->bool_field_put(override_offset, (int) value);
1876 }
1877
1878 void java_lang_reflect_Method::compute_offsets() {
1879 Klass* k = SystemDictionary::reflect_Method_klass();
1880 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
1881 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1882 compute_offset(returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature());
1883 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
1884 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
1885 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
1886 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
1887 // The generic signature and annotations fields are only present in 1.5
1888 signature_offset = -1;
1889 annotations_offset = -1;
1890 parameter_annotations_offset = -1;
1891 annotation_default_offset = -1;
1892 type_annotations_offset = -1;
1893 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
1894 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
1895 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
1896 compute_optional_offset(annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature());
1897 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
1898 }
1899
1900 Handle java_lang_reflect_Method::create(TRAPS) {
1901 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1902 Klass* klass = SystemDictionary::reflect_Method_klass();
1903 // This class is eagerly initialized during VM initialization, since we keep a refence
1904 // to one of the methods
1905 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
1906 return InstanceKlass::cast(klass)->allocate_instance_handle(CHECK_NH);
1907 }
1908
1909 oop java_lang_reflect_Method::clazz(oop reflect) {
1910 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1911 return reflect->obj_field(clazz_offset);
1912 }
1913
1914 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
1915 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1916 reflect->obj_field_put(clazz_offset, value);
1917 }
1918
1919 int java_lang_reflect_Method::slot(oop reflect) {
1920 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1921 return reflect->int_field(slot_offset);
1922 }
1923
1924 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
1925 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1926 reflect->int_field_put(slot_offset, value);
1927 }
1928
1929 oop java_lang_reflect_Method::name(oop method) {
1930 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1931 return method->obj_field(name_offset);
1932 }
1933
1934 void java_lang_reflect_Method::set_name(oop method, oop value) {
1935 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1936 method->obj_field_put(name_offset, value);
1937 }
1938
1939 oop java_lang_reflect_Method::return_type(oop method) {
1940 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1941 return method->obj_field(returnType_offset);
1942 }
1943
1944 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
1945 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1946 method->obj_field_put(returnType_offset, value);
1947 }
1948
1949 oop java_lang_reflect_Method::parameter_types(oop method) {
1950 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1951 return method->obj_field(parameterTypes_offset);
1952 }
1953
1954 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
1955 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1956 method->obj_field_put(parameterTypes_offset, value);
1957 }
1958
1959 oop java_lang_reflect_Method::exception_types(oop method) {
1960 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1961 return method->obj_field(exceptionTypes_offset);
1962 }
1963
1964 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
1965 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1966 method->obj_field_put(exceptionTypes_offset, value);
1967 }
1968
1969 int java_lang_reflect_Method::modifiers(oop method) {
1970 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1971 return method->int_field(modifiers_offset);
1972 }
1973
1974 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
1975 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1976 method->int_field_put(modifiers_offset, value);
1977 }
1978
1979 bool java_lang_reflect_Method::has_signature_field() {
1980 return (signature_offset >= 0);
1981 }
1982
1983 oop java_lang_reflect_Method::signature(oop method) {
1984 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1985 assert(has_signature_field(), "signature field must be present");
1986 return method->obj_field(signature_offset);
1987 }
1988
1989 void java_lang_reflect_Method::set_signature(oop method, oop value) {
1990 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1991 assert(has_signature_field(), "signature field must be present");
1992 method->obj_field_put(signature_offset, value);
1993 }
1994
1995 bool java_lang_reflect_Method::has_annotations_field() {
1996 return (annotations_offset >= 0);
1997 }
1998
1999 oop java_lang_reflect_Method::annotations(oop method) {
2000 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2001 assert(has_annotations_field(), "annotations field must be present");
2002 return method->obj_field(annotations_offset);
2003 }
2004
2005 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
2006 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2007 assert(has_annotations_field(), "annotations field must be present");
2008 method->obj_field_put(annotations_offset, value);
2009 }
2010
2011 bool java_lang_reflect_Method::has_parameter_annotations_field() {
2012 return (parameter_annotations_offset >= 0);
2013 }
2014
2015 oop java_lang_reflect_Method::parameter_annotations(oop method) {
2016 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2017 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2018 return method->obj_field(parameter_annotations_offset);
2019 }
2020
2021 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
2022 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2023 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2024 method->obj_field_put(parameter_annotations_offset, value);
2025 }
2026
2027 bool java_lang_reflect_Method::has_annotation_default_field() {
2028 return (annotation_default_offset >= 0);
2029 }
2030
2031 oop java_lang_reflect_Method::annotation_default(oop method) {
2032 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2033 assert(has_annotation_default_field(), "annotation default field must be present");
2034 return method->obj_field(annotation_default_offset);
2035 }
2036
2037 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
2038 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2039 assert(has_annotation_default_field(), "annotation default field must be present");
2040 method->obj_field_put(annotation_default_offset, value);
2041 }
2042
2043 bool java_lang_reflect_Method::has_type_annotations_field() {
2044 return (type_annotations_offset >= 0);
2045 }
2046
2047 oop java_lang_reflect_Method::type_annotations(oop method) {
2048 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2049 assert(has_type_annotations_field(), "type_annotations field must be present");
2050 return method->obj_field(type_annotations_offset);
2051 }
2052
2053 void java_lang_reflect_Method::set_type_annotations(oop method, oop value) {
2054 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2055 assert(has_type_annotations_field(), "type_annotations field must be present");
2056 method->obj_field_put(type_annotations_offset, value);
2057 }
2058
2059 void java_lang_reflect_Constructor::compute_offsets() {
2060 Klass* k = SystemDictionary::reflect_Constructor_klass();
2061 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
2062 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
2063 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
2064 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
2065 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2066 // The generic signature and annotations fields are only present in 1.5
2067 signature_offset = -1;
2068 annotations_offset = -1;
2069 parameter_annotations_offset = -1;
2070 type_annotations_offset = -1;
2071 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
2072 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
2073 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
2074 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
2075 }
2076
2077 Handle java_lang_reflect_Constructor::create(TRAPS) {
2078 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2079 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
2080 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2081 instanceKlassHandle klass (THREAD, k);
2082 // Ensure it is initialized
2083 klass->initialize(CHECK_NH);
2084 return klass->allocate_instance_handle(CHECK_NH);
2085 }
2086
2087 oop java_lang_reflect_Constructor::clazz(oop reflect) {
2088 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2089 return reflect->obj_field(clazz_offset);
2090 }
2091
2092 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
2093 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2094 reflect->obj_field_put(clazz_offset, value);
2095 }
2096
2097 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
2098 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2099 return constructor->obj_field(parameterTypes_offset);
2100 }
2101
2102 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
2103 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2104 constructor->obj_field_put(parameterTypes_offset, value);
2105 }
2106
2107 oop java_lang_reflect_Constructor::exception_types(oop constructor) {
2108 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2109 return constructor->obj_field(exceptionTypes_offset);
2110 }
2111
2112 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
2113 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2114 constructor->obj_field_put(exceptionTypes_offset, value);
2115 }
2116
2117 int java_lang_reflect_Constructor::slot(oop reflect) {
2118 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2119 return reflect->int_field(slot_offset);
2120 }
2121
2122 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
2123 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2124 reflect->int_field_put(slot_offset, value);
2125 }
2126
2127 int java_lang_reflect_Constructor::modifiers(oop constructor) {
2128 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2129 return constructor->int_field(modifiers_offset);
2130 }
2131
2132 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
2133 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2134 constructor->int_field_put(modifiers_offset, value);
2135 }
2136
2137 bool java_lang_reflect_Constructor::has_signature_field() {
2138 return (signature_offset >= 0);
2139 }
2140
2141 oop java_lang_reflect_Constructor::signature(oop constructor) {
2142 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2143 assert(has_signature_field(), "signature field must be present");
2144 return constructor->obj_field(signature_offset);
2145 }
2146
2147 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
2148 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2149 assert(has_signature_field(), "signature field must be present");
2150 constructor->obj_field_put(signature_offset, value);
2151 }
2152
2153 bool java_lang_reflect_Constructor::has_annotations_field() {
2154 return (annotations_offset >= 0);
2155 }
2156
2157 oop java_lang_reflect_Constructor::annotations(oop constructor) {
2158 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2159 assert(has_annotations_field(), "annotations field must be present");
2160 return constructor->obj_field(annotations_offset);
2161 }
2162
2163 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
2164 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2165 assert(has_annotations_field(), "annotations field must be present");
2166 constructor->obj_field_put(annotations_offset, value);
2167 }
2168
2169 bool java_lang_reflect_Constructor::has_parameter_annotations_field() {
2170 return (parameter_annotations_offset >= 0);
2171 }
2172
2173 oop java_lang_reflect_Constructor::parameter_annotations(oop method) {
2174 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2175 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2176 return method->obj_field(parameter_annotations_offset);
2177 }
2178
2179 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
2180 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2181 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2182 method->obj_field_put(parameter_annotations_offset, value);
2183 }
2184
2185 bool java_lang_reflect_Constructor::has_type_annotations_field() {
2186 return (type_annotations_offset >= 0);
2187 }
2188
2189 oop java_lang_reflect_Constructor::type_annotations(oop constructor) {
2190 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2191 assert(has_type_annotations_field(), "type_annotations field must be present");
2192 return constructor->obj_field(type_annotations_offset);
2193 }
2194
2195 void java_lang_reflect_Constructor::set_type_annotations(oop constructor, oop value) {
2196 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2197 assert(has_type_annotations_field(), "type_annotations field must be present");
2198 constructor->obj_field_put(type_annotations_offset, value);
2199 }
2200
2201 void java_lang_reflect_Field::compute_offsets() {
2202 Klass* k = SystemDictionary::reflect_Field_klass();
2203 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
2204 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2205 compute_offset(type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature());
2206 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
2207 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2208 // The generic signature and annotations fields are only present in 1.5
2209 signature_offset = -1;
2210 annotations_offset = -1;
2211 type_annotations_offset = -1;
2212 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
2213 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
2214 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
2215 }
2216
2217 Handle java_lang_reflect_Field::create(TRAPS) {
2218 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2219 Symbol* name = vmSymbols::java_lang_reflect_Field();
2220 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2221 instanceKlassHandle klass (THREAD, k);
2222 // Ensure it is initialized
2223 klass->initialize(CHECK_NH);
2224 return klass->allocate_instance_handle(CHECK_NH);
2225 }
2226
2227 oop java_lang_reflect_Field::clazz(oop reflect) {
2228 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2229 return reflect->obj_field(clazz_offset);
2230 }
2231
2232 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
2233 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2234 reflect->obj_field_put(clazz_offset, value);
2235 }
2236
2237 oop java_lang_reflect_Field::name(oop field) {
2238 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2239 return field->obj_field(name_offset);
2240 }
2241
2242 void java_lang_reflect_Field::set_name(oop field, oop value) {
2243 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2244 field->obj_field_put(name_offset, value);
2245 }
2246
2247 oop java_lang_reflect_Field::type(oop field) {
2248 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2249 return field->obj_field(type_offset);
2250 }
2251
2252 void java_lang_reflect_Field::set_type(oop field, oop value) {
2253 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2254 field->obj_field_put(type_offset, value);
2255 }
2256
2257 int java_lang_reflect_Field::slot(oop reflect) {
2258 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2259 return reflect->int_field(slot_offset);
2260 }
2261
2262 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
2263 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2264 reflect->int_field_put(slot_offset, value);
2265 }
2266
2267 int java_lang_reflect_Field::modifiers(oop field) {
2268 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2269 return field->int_field(modifiers_offset);
2270 }
2271
2272 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
2273 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2274 field->int_field_put(modifiers_offset, value);
2275 }
2276
2277 bool java_lang_reflect_Field::has_signature_field() {
2278 return (signature_offset >= 0);
2279 }
2280
2281 oop java_lang_reflect_Field::signature(oop field) {
2282 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2283 assert(has_signature_field(), "signature field must be present");
2284 return field->obj_field(signature_offset);
2285 }
2286
2287 void java_lang_reflect_Field::set_signature(oop field, oop value) {
2288 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2289 assert(has_signature_field(), "signature field must be present");
2290 field->obj_field_put(signature_offset, value);
2291 }
2292
2293 bool java_lang_reflect_Field::has_annotations_field() {
2294 return (annotations_offset >= 0);
2295 }
2296
2297 oop java_lang_reflect_Field::annotations(oop field) {
2298 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2299 assert(has_annotations_field(), "annotations field must be present");
2300 return field->obj_field(annotations_offset);
2301 }
2302
2303 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
2304 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2305 assert(has_annotations_field(), "annotations field must be present");
2306 field->obj_field_put(annotations_offset, value);
2307 }
2308
2309 bool java_lang_reflect_Field::has_type_annotations_field() {
2310 return (type_annotations_offset >= 0);
2311 }
2312
2313 oop java_lang_reflect_Field::type_annotations(oop field) {
2314 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2315 assert(has_type_annotations_field(), "type_annotations field must be present");
2316 return field->obj_field(type_annotations_offset);
2317 }
2318
2319 void java_lang_reflect_Field::set_type_annotations(oop field, oop value) {
2320 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2321 assert(has_type_annotations_field(), "type_annotations field must be present");
2322 field->obj_field_put(type_annotations_offset, value);
2323 }
2324
2325 void sun_reflect_ConstantPool::compute_offsets() {
2326 Klass* k = SystemDictionary::reflect_ConstantPool_klass();
2327 // This null test can be removed post beta
2328 if (k != NULL) {
2329 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
2330 compute_offset(_oop_offset, k, vmSymbols::ConstantPool_name(), vmSymbols::object_signature());
2331 }
2332 }
2333
2334 void java_lang_reflect_Parameter::compute_offsets() {
2335 Klass* k = SystemDictionary::reflect_Parameter_klass();
2336 if(NULL != k) {
2337 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2338 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2339 compute_offset(index_offset, k, vmSymbols::index_name(), vmSymbols::int_signature());
2340 compute_offset(executable_offset, k, vmSymbols::executable_name(), vmSymbols::executable_signature());
2341 }
2342 }
2343
2344 Handle java_lang_reflect_Parameter::create(TRAPS) {
2345 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2346 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
2347 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2348 instanceKlassHandle klass (THREAD, k);
2349 // Ensure it is initialized
2350 klass->initialize(CHECK_NH);
2351 return klass->allocate_instance_handle(CHECK_NH);
2352 }
2353
2354 oop java_lang_reflect_Parameter::name(oop param) {
2355 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2356 return param->obj_field(name_offset);
2357 }
2358
2359 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
2360 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2361 param->obj_field_put(name_offset, value);
2362 }
2363
2364 int java_lang_reflect_Parameter::modifiers(oop param) {
2365 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2366 return param->int_field(modifiers_offset);
2367 }
2368
2369 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
2370 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2371 param->int_field_put(modifiers_offset, value);
2372 }
2373
2374 int java_lang_reflect_Parameter::index(oop param) {
2375 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2376 return param->int_field(index_offset);
2377 }
2378
2379 void java_lang_reflect_Parameter::set_index(oop param, int value) {
2380 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2381 param->int_field_put(index_offset, value);
2382 }
2383
2384 oop java_lang_reflect_Parameter::executable(oop param) {
2385 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2386 return param->obj_field(executable_offset);
2387 }
2388
2389 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
2390 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2391 param->obj_field_put(executable_offset, value);
2392 }
2393
2394
2395 Handle sun_reflect_ConstantPool::create(TRAPS) {
2396 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2397 Klass* k = SystemDictionary::reflect_ConstantPool_klass();
2398 instanceKlassHandle klass (THREAD, k);
2399 // Ensure it is initialized
2400 klass->initialize(CHECK_NH);
2401 return klass->allocate_instance_handle(CHECK_NH);
2402 }
2403
2404
2405 void sun_reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
2406 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2407 oop mirror = value->pool_holder()->java_mirror();
2408 // Save the mirror to get back the constant pool.
2409 reflect->obj_field_put(_oop_offset, mirror);
2410 }
2411
2412 ConstantPool* sun_reflect_ConstantPool::get_cp(oop reflect) {
2413 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2414
2415 oop mirror = reflect->obj_field(_oop_offset);
2416 Klass* k = java_lang_Class::as_Klass(mirror);
2417 assert(k->oop_is_instance(), "Must be");
2418
2419 // Get the constant pool back from the klass. Since class redefinition
2420 // merges the new constant pool into the old, this is essentially the
2421 // same constant pool as the original. If constant pool merging is
2422 // no longer done in the future, this will have to change to save
2423 // the original.
2424 return InstanceKlass::cast(k)->constants();
2425 }
2426
2427 void sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
2428 Klass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass();
2429 // This null test can be removed post beta
2430 if (k != NULL) {
2431 compute_offset(_base_offset, k,
2432 vmSymbols::base_name(), vmSymbols::object_signature());
2433 }
2434 }
2435
2436 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
2437 Klass* k = SystemDictionary::box_klass(type);
2438 if (k == NULL) return NULL;
2439 instanceKlassHandle h (THREAD, k);
2440 if (!h->is_initialized()) h->initialize(CHECK_0);
2441 return h->allocate_instance(THREAD);
2442 }
2443
2444
2445 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
2446 oop box = initialize_and_allocate(type, CHECK_0);
2447 if (box == NULL) return NULL;
2448 switch (type) {
2449 case T_BOOLEAN:
2450 box->bool_field_put(value_offset, value->z);
2451 break;
2452 case T_CHAR:
2453 box->char_field_put(value_offset, value->c);
2454 break;
2455 case T_FLOAT:
2456 box->float_field_put(value_offset, value->f);
2457 break;
2458 case T_DOUBLE:
2459 box->double_field_put(long_value_offset, value->d);
2460 break;
2461 case T_BYTE:
2462 box->byte_field_put(value_offset, value->b);
2463 break;
2464 case T_SHORT:
2465 box->short_field_put(value_offset, value->s);
2466 break;
2467 case T_INT:
2468 box->int_field_put(value_offset, value->i);
2469 break;
2470 case T_LONG:
2471 box->long_field_put(long_value_offset, value->j);
2472 break;
2473 default:
2474 return NULL;
2475 }
2476 return box;
2477 }
2478
2479
2480 BasicType java_lang_boxing_object::basic_type(oop box) {
2481 if (box == NULL) return T_ILLEGAL;
2482 BasicType type = SystemDictionary::box_klass_type(box->klass());
2483 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
2484 return T_ILLEGAL;
2485 return type;
2486 }
2487
2488
2489 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
2490 BasicType type = SystemDictionary::box_klass_type(box->klass());
2491 switch (type) {
2492 case T_BOOLEAN:
2493 value->z = box->bool_field(value_offset);
2494 break;
2495 case T_CHAR:
2496 value->c = box->char_field(value_offset);
2497 break;
2498 case T_FLOAT:
2499 value->f = box->float_field(value_offset);
2500 break;
2501 case T_DOUBLE:
2502 value->d = box->double_field(long_value_offset);
2503 break;
2504 case T_BYTE:
2505 value->b = box->byte_field(value_offset);
2506 break;
2507 case T_SHORT:
2508 value->s = box->short_field(value_offset);
2509 break;
2510 case T_INT:
2511 value->i = box->int_field(value_offset);
2512 break;
2513 case T_LONG:
2514 value->j = box->long_field(long_value_offset);
2515 break;
2516 default:
2517 return T_ILLEGAL;
2518 } // end switch
2519 return type;
2520 }
2521
2522
2523 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
2524 BasicType type = SystemDictionary::box_klass_type(box->klass());
2525 switch (type) {
2526 case T_BOOLEAN:
2527 box->bool_field_put(value_offset, value->z);
2528 break;
2529 case T_CHAR:
2530 box->char_field_put(value_offset, value->c);
2531 break;
2532 case T_FLOAT:
2533 box->float_field_put(value_offset, value->f);
2534 break;
2535 case T_DOUBLE:
2536 box->double_field_put(long_value_offset, value->d);
2537 break;
2538 case T_BYTE:
2539 box->byte_field_put(value_offset, value->b);
2540 break;
2541 case T_SHORT:
2542 box->short_field_put(value_offset, value->s);
2543 break;
2544 case T_INT:
2545 box->int_field_put(value_offset, value->i);
2546 break;
2547 case T_LONG:
2548 box->long_field_put(long_value_offset, value->j);
2549 break;
2550 default:
2551 return T_ILLEGAL;
2552 } // end switch
2553 return type;
2554 }
2555
2556
2557 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
2558 switch (type) {
2559 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
2560 case T_CHAR: st->print("%d", value->c); break;
2561 case T_BYTE: st->print("%d", value->b); break;
2562 case T_SHORT: st->print("%d", value->s); break;
2563 case T_INT: st->print("%d", value->i); break;
2564 case T_LONG: st->print(INT64_FORMAT, value->j); break;
2565 case T_FLOAT: st->print("%f", value->f); break;
2566 case T_DOUBLE: st->print("%lf", value->d); break;
2567 default: st->print("type %d?", type); break;
2568 }
2569 }
2570
2571
2572 // Support for java_lang_ref_Reference
2573 HeapWord *java_lang_ref_Reference::pending_list_lock_addr() {
2574 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2575 address addr = ik->static_field_addr(static_lock_offset);
2576 return (HeapWord*) addr;
2577 }
2578
2579 oop java_lang_ref_Reference::pending_list_lock() {
2580 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2581 address addr = ik->static_field_addr(static_lock_offset);
2582 if (UseCompressedOops) {
2583 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
2584 } else {
2585 return oopDesc::load_decode_heap_oop((oop*)addr);
2586 }
2587 }
2588
2589 HeapWord *java_lang_ref_Reference::pending_list_addr() {
2590 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2591 address addr = ik->static_field_addr(static_pending_offset);
2592 // XXX This might not be HeapWord aligned, almost rather be char *.
2593 return (HeapWord*)addr;
2594 }
2595
2596 oop java_lang_ref_Reference::pending_list() {
2597 char *addr = (char *)pending_list_addr();
2598 if (UseCompressedOops) {
2599 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
2600 } else {
2601 return oopDesc::load_decode_heap_oop((oop*)addr);
2602 }
2603 }
2604
2605
2606 // Support for java_lang_ref_SoftReference
2607
2608 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
2609 return ref->long_field(timestamp_offset);
2610 }
2611
2612 jlong java_lang_ref_SoftReference::clock() {
2613 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass());
2614 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
2615 return *offset;
2616 }
2617
2618 void java_lang_ref_SoftReference::set_clock(jlong value) {
2619 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass());
2620 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
2621 *offset = value;
2622 }
2623
2624 // Support for java_lang_invoke_DirectMethodHandle
2625
2626 int java_lang_invoke_DirectMethodHandle::_member_offset;
2627
2628 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
2629 oop member_name = NULL;
2630 bool is_dmh = dmh->is_oop() && java_lang_invoke_DirectMethodHandle::is_instance(dmh);
2631 assert(is_dmh, "a DirectMethodHandle oop is expected");
2632 if (is_dmh) {
2633 member_name = dmh->obj_field(member_offset_in_bytes());
2634 }
2635 return member_name;
2636 }
2637
2638 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
2639 Klass* klass_oop = SystemDictionary::DirectMethodHandle_klass();
2640 if (klass_oop != NULL && EnableInvokeDynamic) {
2641 compute_offset(_member_offset, klass_oop, vmSymbols::member_name(), vmSymbols::java_lang_invoke_MemberName_signature());
2642 }
2643 }
2644
2645 // Support for java_lang_invoke_MethodHandle
2646
2647 int java_lang_invoke_MethodHandle::_type_offset;
2648 int java_lang_invoke_MethodHandle::_form_offset;
2649
2650 int java_lang_invoke_MemberName::_clazz_offset;
2651 int java_lang_invoke_MemberName::_name_offset;
2652 int java_lang_invoke_MemberName::_type_offset;
2653 int java_lang_invoke_MemberName::_flags_offset;
2654 int java_lang_invoke_MemberName::_vmtarget_offset;
2655 int java_lang_invoke_MemberName::_vmloader_offset;
2656 int java_lang_invoke_MemberName::_vmindex_offset;
2657
2658 int java_lang_invoke_LambdaForm::_vmentry_offset;
2659
2660 void java_lang_invoke_MethodHandle::compute_offsets() {
2661 Klass* klass_oop = SystemDictionary::MethodHandle_klass();
2662 if (klass_oop != NULL && EnableInvokeDynamic) {
2663 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::java_lang_invoke_MethodType_signature());
2664 compute_optional_offset(_form_offset, klass_oop, vmSymbols::form_name(), vmSymbols::java_lang_invoke_LambdaForm_signature());
2665 if (_form_offset == 0) {
2666 EnableInvokeDynamic = false;
2667 }
2668 }
2669 }
2670
2671 void java_lang_invoke_MemberName::compute_offsets() {
2672 Klass* klass_oop = SystemDictionary::MemberName_klass();
2673 if (klass_oop != NULL && EnableInvokeDynamic) {
2674 compute_offset(_clazz_offset, klass_oop, vmSymbols::clazz_name(), vmSymbols::class_signature());
2675 compute_offset(_name_offset, klass_oop, vmSymbols::name_name(), vmSymbols::string_signature());
2676 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::object_signature());
2677 compute_offset(_flags_offset, klass_oop, vmSymbols::flags_name(), vmSymbols::int_signature());
2678 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2679 }
2680 }
2681
2682 void java_lang_invoke_LambdaForm::compute_offsets() {
2683 Klass* klass_oop = SystemDictionary::LambdaForm_klass();
2684 if (klass_oop != NULL && EnableInvokeDynamic) {
2685 compute_offset(_vmentry_offset, klass_oop, vmSymbols::vmentry_name(), vmSymbols::java_lang_invoke_MemberName_signature());
2686 }
2687 }
2688
2689 oop java_lang_invoke_MethodHandle::type(oop mh) {
2690 return mh->obj_field(_type_offset);
2691 }
2692
2693 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
2694 mh->obj_field_put(_type_offset, mtype);
2695 }
2696
2697 oop java_lang_invoke_MethodHandle::form(oop mh) {
2698 assert(_form_offset != 0, "");
2699 return mh->obj_field(_form_offset);
2700 }
2701
2702 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
2703 assert(_form_offset != 0, "");
2704 mh->obj_field_put(_form_offset, lform);
2705 }
2706
2707 /// MemberName accessors
2708
2709 oop java_lang_invoke_MemberName::clazz(oop mname) {
2710 assert(is_instance(mname), "wrong type");
2711 return mname->obj_field(_clazz_offset);
2712 }
2713
2714 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
2715 assert(is_instance(mname), "wrong type");
2716 mname->obj_field_put(_clazz_offset, clazz);
2717 }
2718
2719 oop java_lang_invoke_MemberName::name(oop mname) {
2720 assert(is_instance(mname), "wrong type");
2721 return mname->obj_field(_name_offset);
2722 }
2723
2724 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
2725 assert(is_instance(mname), "wrong type");
2726 mname->obj_field_put(_name_offset, name);
2727 }
2728
2729 oop java_lang_invoke_MemberName::type(oop mname) {
2730 assert(is_instance(mname), "wrong type");
2731 return mname->obj_field(_type_offset);
2732 }
2733
2734 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
2735 assert(is_instance(mname), "wrong type");
2736 mname->obj_field_put(_type_offset, type);
2737 }
2738
2739 int java_lang_invoke_MemberName::flags(oop mname) {
2740 assert(is_instance(mname), "wrong type");
2741 return mname->int_field(_flags_offset);
2742 }
2743
2744 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
2745 assert(is_instance(mname), "wrong type");
2746 mname->int_field_put(_flags_offset, flags);
2747 }
2748
2749 Metadata* java_lang_invoke_MemberName::vmtarget(oop mname) {
2750 assert(is_instance(mname), "wrong type");
2751 return (Metadata*)mname->address_field(_vmtarget_offset);
2752 }
2753
2754 #if INCLUDE_JVMTI
2755 // Can be executed on VM thread only
2756 void java_lang_invoke_MemberName::adjust_vmtarget(oop mname, Metadata* ref) {
2757 assert((is_instance(mname) && (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0), "wrong type");
2758 assert(Thread::current()->is_VM_thread(), "not VM thread");
2759 mname->address_field_put(_vmtarget_offset, (address)ref);
2760 }
2761 #endif // INCLUDE_JVMTI
2762
2763 void java_lang_invoke_MemberName::set_vmtarget(oop mname, Metadata* ref) {
2764 assert(is_instance(mname), "wrong type");
2765 // check the type of the vmtarget
2766 oop dependency = NULL;
2767 if (ref != NULL) {
2768 switch (flags(mname) & (MN_IS_METHOD |
2769 MN_IS_CONSTRUCTOR |
2770 MN_IS_FIELD)) {
2771 case MN_IS_METHOD:
2772 case MN_IS_CONSTRUCTOR:
2773 assert(ref->is_method(), "should be a method");
2774 dependency = ((Method*)ref)->method_holder()->java_mirror();
2775 break;
2776 case MN_IS_FIELD:
2777 assert(ref->is_klass(), "should be a class");
2778 dependency = ((Klass*)ref)->java_mirror();
2779 break;
2780 default:
2781 ShouldNotReachHere();
2782 }
2783 }
2784 mname->address_field_put(_vmtarget_offset, (address)ref);
2785 // Add a reference to the loader (actually mirror because anonymous classes will not have
2786 // distinct loaders) to ensure the metadata is kept alive
2787 // This mirror may be different than the one in clazz field.
2788 mname->obj_field_put(_vmloader_offset, dependency);
2789 }
2790
2791 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
2792 assert(is_instance(mname), "wrong type");
2793 return (intptr_t) mname->address_field(_vmindex_offset);
2794 }
2795
2796 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
2797 assert(is_instance(mname), "wrong type");
2798 mname->address_field_put(_vmindex_offset, (address) index);
2799 }
2800
2801 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
2802 assert(is_instance(lform), "wrong type");
2803 return lform->obj_field(_vmentry_offset);
2804 }
2805
2806
2807 // Support for java_lang_invoke_MethodType
2808
2809 int java_lang_invoke_MethodType::_rtype_offset;
2810 int java_lang_invoke_MethodType::_ptypes_offset;
2811
2812 void java_lang_invoke_MethodType::compute_offsets() {
2813 Klass* k = SystemDictionary::MethodType_klass();
2814 if (k != NULL) {
2815 compute_offset(_rtype_offset, k, vmSymbols::rtype_name(), vmSymbols::class_signature());
2816 compute_offset(_ptypes_offset, k, vmSymbols::ptypes_name(), vmSymbols::class_array_signature());
2817 }
2818 }
2819
2820 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
2821 st->print("(");
2822 objArrayOop pts = ptypes(mt);
2823 for (int i = 0, limit = pts->length(); i < limit; i++) {
2824 java_lang_Class::print_signature(pts->obj_at(i), st);
2825 }
2826 st->print(")");
2827 java_lang_Class::print_signature(rtype(mt), st);
2828 }
2829
2830 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) {
2831 ResourceMark rm;
2832 stringStream buffer(128);
2833 print_signature(mt, &buffer);
2834 const char* sigstr = buffer.base();
2835 int siglen = (int) buffer.size();
2836 Symbol *name;
2837 if (!intern_if_not_found) {
2838 name = SymbolTable::probe(sigstr, siglen);
2839 } else {
2840 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
2841 }
2842 return name;
2843 }
2844
2845 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
2846 if (mt1 == mt2)
2847 return true;
2848 if (rtype(mt1) != rtype(mt2))
2849 return false;
2850 if (ptype_count(mt1) != ptype_count(mt2))
2851 return false;
2852 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
2853 if (ptype(mt1, i) != ptype(mt2, i))
2854 return false;
2855 }
2856 return true;
2857 }
2858
2859 oop java_lang_invoke_MethodType::rtype(oop mt) {
2860 assert(is_instance(mt), "must be a MethodType");
2861 return mt->obj_field(_rtype_offset);
2862 }
2863
2864 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
2865 assert(is_instance(mt), "must be a MethodType");
2866 return (objArrayOop) mt->obj_field(_ptypes_offset);
2867 }
2868
2869 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
2870 return ptypes(mt)->obj_at(idx);
2871 }
2872
2873 int java_lang_invoke_MethodType::ptype_count(oop mt) {
2874 return ptypes(mt)->length();
2875 }
2876
2877 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
2878 objArrayOop pts = ptypes(mt);
2879 int count = pts->length();
2880 int slots = 0;
2881 for (int i = 0; i < count; i++) {
2882 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
2883 slots += type2size[bt];
2884 }
2885 return slots;
2886 }
2887
2888 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
2889 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
2890 return type2size[bt];
2891 }
2892
2893
2894 // Support for java_lang_invoke_CallSite
2895
2896 int java_lang_invoke_CallSite::_target_offset;
2897
2898 void java_lang_invoke_CallSite::compute_offsets() {
2899 if (!EnableInvokeDynamic) return;
2900 Klass* k = SystemDictionary::CallSite_klass();
2901 if (k != NULL) {
2902 compute_offset(_target_offset, k, vmSymbols::target_name(), vmSymbols::java_lang_invoke_MethodHandle_signature());
2903 }
2904 }
2905
2906
2907 // Support for java_security_AccessControlContext
2908
2909 int java_security_AccessControlContext::_context_offset = 0;
2910 int java_security_AccessControlContext::_privilegedContext_offset = 0;
2911 int java_security_AccessControlContext::_isPrivileged_offset = 0;
2912 int java_security_AccessControlContext::_isAuthorized_offset = -1;
2913
2914 void java_security_AccessControlContext::compute_offsets() {
2915 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
2916 fieldDescriptor fd;
2917 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass());
2918
2919 if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) {
2920 fatal("Invalid layout of java.security.AccessControlContext");
2921 }
2922 _context_offset = fd.offset();
2923
2924 if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) {
2925 fatal("Invalid layout of java.security.AccessControlContext");
2926 }
2927 _privilegedContext_offset = fd.offset();
2928
2929 if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) {
2930 fatal("Invalid layout of java.security.AccessControlContext");
2931 }
2932 _isPrivileged_offset = fd.offset();
2933
2934 // The offset may not be present for bootstrapping with older JDK.
2935 if (ik->find_local_field(vmSymbols::isAuthorized_name(), vmSymbols::bool_signature(), &fd)) {
2936 _isAuthorized_offset = fd.offset();
2937 }
2938 }
2939
2940
2941 bool java_security_AccessControlContext::is_authorized(Handle context) {
2942 assert(context.not_null() && context->klass() == SystemDictionary::AccessControlContext_klass(), "Invalid type");
2943 assert(_isAuthorized_offset != -1, "should be set");
2944 return context->bool_field(_isAuthorized_offset) != 0;
2945 }
2946
2947 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
2948 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
2949 // Ensure klass is initialized
2950 InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->initialize(CHECK_0);
2951 // Allocate result
2952 oop result = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->allocate_instance(CHECK_0);
2953 // Fill in values
2954 result->obj_field_put(_context_offset, context());
2955 result->obj_field_put(_privilegedContext_offset, privileged_context());
2956 result->bool_field_put(_isPrivileged_offset, isPrivileged);
2957 // whitelist AccessControlContexts created by the JVM if present
2958 if (_isAuthorized_offset != -1) {
2959 result->bool_field_put(_isAuthorized_offset, true);
2960 }
2961 return result;
2962 }
2963
2964
2965 // Support for java_lang_ClassLoader
2966
2967 bool java_lang_ClassLoader::offsets_computed = false;
2968 int java_lang_ClassLoader::_loader_data_offset = -1;
2969 int java_lang_ClassLoader::parallelCapable_offset = -1;
2970
2971 ClassLoaderData** java_lang_ClassLoader::loader_data_addr(oop loader) {
2972 assert(loader != NULL && loader->is_oop(), "loader must be oop");
2973 return (ClassLoaderData**) loader->address_field_addr(_loader_data_offset);
2974 }
2975
2976 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
2977 return *java_lang_ClassLoader::loader_data_addr(loader);
2978 }
2979
2980 void java_lang_ClassLoader::compute_offsets() {
2981 assert(!offsets_computed, "offsets should be initialized only once");
2982 offsets_computed = true;
2983
2984 // The field indicating parallelCapable (parallelLockMap) is only present starting in 7,
2985 Klass* k1 = SystemDictionary::ClassLoader_klass();
2986 compute_optional_offset(parallelCapable_offset,
2987 k1, vmSymbols::parallelCapable_name(), vmSymbols::concurrenthashmap_signature());
2988
2989 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2990 }
2991
2992 oop java_lang_ClassLoader::parent(oop loader) {
2993 assert(is_instance(loader), "loader must be oop");
2994 return loader->obj_field(parent_offset);
2995 }
2996
2997 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
2998 assert(is_instance(loader), "loader must be oop");
2999 assert(cl == NULL || is_instance(cl), "cl argument must be oop");
3000 oop acl = loader;
3001 debug_only(jint loop_count = 0);
3002 // This loop taken verbatim from ClassLoader.java:
3003 do {
3004 acl = parent(acl);
3005 if (cl == acl) {
3006 return true;
3007 }
3008 assert(++loop_count > 0, "loop_count overflow");
3009 } while (acl != NULL);
3010 return false;
3011 }
3012
3013
3014 // For class loader classes, parallelCapable defined
3015 // based on non-null field
3016 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
3017 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
3018 if (!JDK_Version::is_gte_jdk17x_version()
3019 || parallelCapable_offset == -1) {
3020 // Default for backward compatibility is false
3021 return false;
3022 }
3023 return (class_loader->obj_field(parallelCapable_offset) != NULL);
3024 }
3025
3026 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
3027 // Fix for 4474172; see evaluation for more details
3028 loader = non_reflection_class_loader(loader);
3029
3030 oop cl = SystemDictionary::java_system_loader();
3031 while(cl != NULL) {
3032 if (cl == loader) return true;
3033 cl = parent(cl);
3034 }
3035 return false;
3036 }
3037
3038 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
3039 if (loader != NULL) {
3040 // See whether this is one of the class loaders associated with
3041 // the generated bytecodes for reflection, and if so, "magically"
3042 // delegate to its parent to prevent class loading from occurring
3043 // in places where applications using reflection didn't expect it.
3044 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass();
3045 // This might be null in non-1.4 JDKs
3046 if (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)) {
3047 return parent(loader);
3048 }
3049 }
3050 return loader;
3051 }
3052
3053
3054 // Support for java_lang_System
3055 int java_lang_System::in_offset_in_bytes() {
3056 return (InstanceMirrorKlass::offset_of_static_fields() + static_in_offset);
3057 }
3058
3059
3060 int java_lang_System::out_offset_in_bytes() {
3061 return (InstanceMirrorKlass::offset_of_static_fields() + static_out_offset);
3062 }
3063
3064
3065 int java_lang_System::err_offset_in_bytes() {
3066 return (InstanceMirrorKlass::offset_of_static_fields() + static_err_offset);
3067 }
3068
3069
3070 bool java_lang_System::has_security_manager() {
3071 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::System_klass());
3072 address addr = ik->static_field_addr(static_security_offset);
3073 if (UseCompressedOops) {
3074 return oopDesc::load_decode_heap_oop((narrowOop *)addr) != NULL;
3075 } else {
3076 return oopDesc::load_decode_heap_oop((oop*)addr) != NULL;
3077 }
3078 }
3079
3080 int java_lang_Class::_klass_offset;
3081 int java_lang_Class::_array_klass_offset;
3082 int java_lang_Class::_oop_size_offset;
3083 int java_lang_Class::_static_oop_field_count_offset;
3084 int java_lang_Class::_protection_domain_offset;
3085 int java_lang_Class::_init_lock_offset;
3086 int java_lang_Class::_signers_offset;
3087 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL;
3088 int java_lang_Throwable::backtrace_offset;
3089 int java_lang_Throwable::detailMessage_offset;
3090 int java_lang_Throwable::cause_offset;
3091 int java_lang_Throwable::stackTrace_offset;
3092 int java_lang_Throwable::static_unassigned_stacktrace_offset;
3093 int java_lang_reflect_AccessibleObject::override_offset;
3094 int java_lang_reflect_Method::clazz_offset;
3095 int java_lang_reflect_Method::name_offset;
3096 int java_lang_reflect_Method::returnType_offset;
3097 int java_lang_reflect_Method::parameterTypes_offset;
3098 int java_lang_reflect_Method::exceptionTypes_offset;
3099 int java_lang_reflect_Method::slot_offset;
3100 int java_lang_reflect_Method::modifiers_offset;
3101 int java_lang_reflect_Method::signature_offset;
3102 int java_lang_reflect_Method::annotations_offset;
3103 int java_lang_reflect_Method::parameter_annotations_offset;
3104 int java_lang_reflect_Method::annotation_default_offset;
3105 int java_lang_reflect_Method::type_annotations_offset;
3106 int java_lang_reflect_Constructor::clazz_offset;
3107 int java_lang_reflect_Constructor::parameterTypes_offset;
3108 int java_lang_reflect_Constructor::exceptionTypes_offset;
3109 int java_lang_reflect_Constructor::slot_offset;
3110 int java_lang_reflect_Constructor::modifiers_offset;
3111 int java_lang_reflect_Constructor::signature_offset;
3112 int java_lang_reflect_Constructor::annotations_offset;
3113 int java_lang_reflect_Constructor::parameter_annotations_offset;
3114 int java_lang_reflect_Constructor::type_annotations_offset;
3115 int java_lang_reflect_Field::clazz_offset;
3116 int java_lang_reflect_Field::name_offset;
3117 int java_lang_reflect_Field::type_offset;
3118 int java_lang_reflect_Field::slot_offset;
3119 int java_lang_reflect_Field::modifiers_offset;
3120 int java_lang_reflect_Field::signature_offset;
3121 int java_lang_reflect_Field::annotations_offset;
3122 int java_lang_reflect_Field::type_annotations_offset;
3123 int java_lang_reflect_Parameter::name_offset;
3124 int java_lang_reflect_Parameter::modifiers_offset;
3125 int java_lang_reflect_Parameter::index_offset;
3126 int java_lang_reflect_Parameter::executable_offset;
3127 int java_lang_boxing_object::value_offset;
3128 int java_lang_boxing_object::long_value_offset;
3129 int java_lang_ref_Reference::referent_offset;
3130 int java_lang_ref_Reference::queue_offset;
3131 int java_lang_ref_Reference::next_offset;
3132 int java_lang_ref_Reference::discovered_offset;
3133 int java_lang_ref_Reference::static_lock_offset;
3134 int java_lang_ref_Reference::static_pending_offset;
3135 int java_lang_ref_Reference::number_of_fake_oop_fields;
3136 int java_lang_ref_SoftReference::timestamp_offset;
3137 int java_lang_ref_SoftReference::static_clock_offset;
3138 int java_lang_ClassLoader::parent_offset;
3139 int java_lang_System::static_in_offset;
3140 int java_lang_System::static_out_offset;
3141 int java_lang_System::static_err_offset;
3142 int java_lang_System::static_security_offset;
3143 int java_lang_StackTraceElement::declaringClass_offset;
3144 int java_lang_StackTraceElement::methodName_offset;
3145 int java_lang_StackTraceElement::fileName_offset;
3146 int java_lang_StackTraceElement::lineNumber_offset;
3147 int java_lang_AssertionStatusDirectives::classes_offset;
3148 int java_lang_AssertionStatusDirectives::classEnabled_offset;
3149 int java_lang_AssertionStatusDirectives::packages_offset;
3150 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
3151 int java_lang_AssertionStatusDirectives::deflt_offset;
3152 int java_nio_Buffer::_limit_offset;
3153 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0;
3154 int sun_reflect_ConstantPool::_oop_offset;
3155 int sun_reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
3156
3157
3158 // Support for java_lang_StackTraceElement
3159
3160 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
3161 element->obj_field_put(fileName_offset, value);
3162 }
3163
3164 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
3165 element->obj_field_put(declaringClass_offset, value);
3166 }
3167
3168 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
3169 element->obj_field_put(methodName_offset, value);
3170 }
3171
3172 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
3173 element->int_field_put(lineNumber_offset, value);
3174 }
3175
3176
3177 // Support for java Assertions - java_lang_AssertionStatusDirectives.
3178
3179 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
3180 o->obj_field_put(classes_offset, val);
3181 }
3182
3183 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
3184 o->obj_field_put(classEnabled_offset, val);
3185 }
3186
3187 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
3188 o->obj_field_put(packages_offset, val);
3189 }
3190
3191 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
3192 o->obj_field_put(packageEnabled_offset, val);
3193 }
3194
3195 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
3196 o->bool_field_put(deflt_offset, val);
3197 }
3198
3199
3200 // Support for intrinsification of java.nio.Buffer.checkIndex
3201 int java_nio_Buffer::limit_offset() {
3202 return _limit_offset;
3203 }
3204
3205
3206 void java_nio_Buffer::compute_offsets() {
3207 Klass* k = SystemDictionary::nio_Buffer_klass();
3208 assert(k != NULL, "must be loaded in 1.4+");
3209 compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature());
3210 }
3211
3212 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) {
3213 if (_owner_offset != 0) return;
3214
3215 assert(JDK_Version::is_gte_jdk16x_version(), "Must be JDK 1.6 or later");
3216 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK);
3217 Klass* k = SystemDictionary::abstract_ownable_synchronizer_klass();
3218 compute_offset(_owner_offset, k,
3219 vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature());
3220 }
3221
3222 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
3223 assert(_owner_offset != 0, "Must be initialized");
3224 return obj->obj_field(_owner_offset);
3225 }
3226
3227 // Compute hard-coded offsets
3228 // Invoked before SystemDictionary::initialize, so pre-loaded classes
3229 // are not available to determine the offset_of_static_fields.
3230 void JavaClasses::compute_hard_coded_offsets() {
3231 const int x = heapOopSize;
3232 const int header = instanceOopDesc::base_offset_in_bytes();
3233
3234 // Throwable Class
3235 java_lang_Throwable::backtrace_offset = java_lang_Throwable::hc_backtrace_offset * x + header;
3236 java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header;
3237 java_lang_Throwable::cause_offset = java_lang_Throwable::hc_cause_offset * x + header;
3238 java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header;
3239 java_lang_Throwable::static_unassigned_stacktrace_offset = java_lang_Throwable::hc_static_unassigned_stacktrace_offset * x;
3240
3241 // java_lang_boxing_object
3242 java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header;
3243 java_lang_boxing_object::long_value_offset = align_size_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong);
3244
3245 // java_lang_ref_Reference:
3246 java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header;
3247 java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header;
3248 java_lang_ref_Reference::next_offset = java_lang_ref_Reference::hc_next_offset * x + header;
3249 java_lang_ref_Reference::discovered_offset = java_lang_ref_Reference::hc_discovered_offset * x + header;
3250 java_lang_ref_Reference::static_lock_offset = java_lang_ref_Reference::hc_static_lock_offset * x;
3251 java_lang_ref_Reference::static_pending_offset = java_lang_ref_Reference::hc_static_pending_offset * x;
3252 // Artificial fields for java_lang_ref_Reference
3253 // The first field is for the discovered field added in 1.4
3254 java_lang_ref_Reference::number_of_fake_oop_fields = 1;
3255
3256 // java_lang_ref_SoftReference Class
3257 java_lang_ref_SoftReference::timestamp_offset = align_size_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong);
3258 // Don't multiply static fields because they are always in wordSize units
3259 java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x;
3260
3261 // java_lang_ClassLoader
3262 java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header;
3263
3264 // java_lang_System
3265 java_lang_System::static_in_offset = java_lang_System::hc_static_in_offset * x;
3266 java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x;
3267 java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x;
3268 java_lang_System::static_security_offset = java_lang_System::hc_static_security_offset * x;
3269
3270 // java_lang_StackTraceElement
3271 java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset * x + header;
3272 java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header;
3273 java_lang_StackTraceElement::fileName_offset = java_lang_StackTraceElement::hc_fileName_offset * x + header;
3274 java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header;
3275 java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header;
3276 java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header;
3277 java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header;
3278 java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header;
3279 java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header;
3280
3281 }
3282
3283
3284 // Compute non-hard-coded field offsets of all the classes in this file
3285 void JavaClasses::compute_offsets() {
3286 // java_lang_Class::compute_offsets was called earlier in bootstrap
3287 java_lang_ClassLoader::compute_offsets();
3288 java_lang_Thread::compute_offsets();
3289 java_lang_ThreadGroup::compute_offsets();
3290 if (EnableInvokeDynamic) {
3291 java_lang_invoke_MethodHandle::compute_offsets();
3292 java_lang_invoke_DirectMethodHandle::compute_offsets();
3293 java_lang_invoke_MemberName::compute_offsets();
3294 java_lang_invoke_LambdaForm::compute_offsets();
3295 java_lang_invoke_MethodType::compute_offsets();
3296 java_lang_invoke_CallSite::compute_offsets();
3297 }
3298 java_security_AccessControlContext::compute_offsets();
3299 // Initialize reflection classes. The layouts of these classes
3300 // changed with the new reflection implementation in JDK 1.4, and
3301 // since the Universe doesn't know what JDK version it is until this
3302 // point we defer computation of these offsets until now.
3303 java_lang_reflect_AccessibleObject::compute_offsets();
3304 java_lang_reflect_Method::compute_offsets();
3305 java_lang_reflect_Constructor::compute_offsets();
3306 java_lang_reflect_Field::compute_offsets();
3307 if (JDK_Version::is_gte_jdk14x_version()) {
3308 java_nio_Buffer::compute_offsets();
3309 }
3310 if (JDK_Version::is_gte_jdk15x_version()) {
3311 sun_reflect_ConstantPool::compute_offsets();
3312 sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets();
3313 }
3314 if (JDK_Version::is_gte_jdk18x_version())
3315 java_lang_reflect_Parameter::compute_offsets();
3316
3317 // generated interpreter code wants to know about the offsets we just computed:
3318 AbstractAssembler::update_delayed_values();
3319 }
3320
3321 #ifndef PRODUCT
3322
3323 // These functions exist to assert the validity of hard-coded field offsets to guard
3324 // against changes in the class files
3325
3326 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
3327 EXCEPTION_MARK;
3328 fieldDescriptor fd;
3329 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3330 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3331 instanceKlassHandle h_klass (THREAD, k);
3332 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3333 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3334 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3335 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
3336 return false;
3337 }
3338 if (fd.is_static()) {
3339 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
3340 return false;
3341 }
3342 if (fd.offset() == hardcoded_offset ) {
3343 return true;
3344 } else {
3345 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
3346 klass_name, field_name, hardcoded_offset, fd.offset());
3347 return false;
3348 }
3349 }
3350
3351
3352 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
3353 EXCEPTION_MARK;
3354 fieldDescriptor fd;
3355 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3356 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3357 instanceKlassHandle h_klass (THREAD, k);
3358 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3359 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3360 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3361 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3362 return false;
3363 }
3364 if (!fd.is_static()) {
3365 tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name);
3366 return false;
3367 }
3368 if (fd.offset() == hardcoded_offset + InstanceMirrorKlass::offset_of_static_fields()) {
3369 return true;
3370 } else {
3371 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());
3372 return false;
3373 }
3374 }
3375
3376
3377 bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) {
3378 EXCEPTION_MARK;
3379 fieldDescriptor fd;
3380 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3381 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3382 instanceKlassHandle h_klass (THREAD, k);
3383 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3384 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3385 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3386 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3387 return false;
3388 }
3389 if (!fd.is_static() || !fd.has_initial_value()) {
3390 tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name);
3391 return false;
3392 }
3393 if (!fd.initial_value_tag().is_int()) {
3394 tty->print_cr("Static field %s.%s is not an int", klass_name, field_name);
3395 return false;
3396 }
3397 jint field_value = fd.int_initial_value();
3398 if (field_value == hardcoded_constant) {
3399 return true;
3400 } else {
3401 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);
3402 return false;
3403 }
3404 }
3405
3406
3407 // Check the hard-coded field offsets of all the classes in this file
3408
3409 void JavaClasses::check_offsets() {
3410 bool valid = true;
3411 HandleMark hm;
3412
3413 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3414 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
3415
3416 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3417 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
3418
3419 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3420 valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig)
3421
3422 #define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \
3423 valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig)
3424
3425 // java.lang.String
3426
3427 CHECK_OFFSET("java/lang/String", java_lang_String, value, "[C");
3428 if (java_lang_String::has_offset_field()) {
3429 CHECK_OFFSET("java/lang/String", java_lang_String, offset, "I");
3430 CHECK_OFFSET("java/lang/String", java_lang_String, count, "I");
3431 }
3432 if (java_lang_String::has_hash_field()) {
3433 CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I");
3434 }
3435
3436 // java.lang.Class
3437
3438 // Fake fields
3439 // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked
3440 // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked
3441
3442 // java.lang.Throwable
3443
3444 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;");
3445 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;");
3446 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, cause, "Ljava/lang/Throwable;");
3447 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;");
3448
3449 // Boxed primitive objects (java_lang_boxing_object)
3450
3451 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
3452 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
3453 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
3454 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
3455 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
3456 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
3457 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
3458 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
3459
3460 // java.lang.ClassLoader
3461
3462 CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent, "Ljava/lang/ClassLoader;");
3463
3464 // java.lang.System
3465
3466 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, in, "Ljava/io/InputStream;");
3467 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;");
3468 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;");
3469 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, security, "Ljava/lang/SecurityManager;");
3470
3471 // java.lang.StackTraceElement
3472
3473 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;");
3474 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;");
3475 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, fileName, "Ljava/lang/String;");
3476 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I");
3477
3478 // java.lang.ref.Reference
3479
3480 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
3481 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
3482 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
3483 // Fake field
3484 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
3485 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, lock, "Ljava/lang/ref/Reference$Lock;");
3486 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, pending, "Ljava/lang/ref/Reference;");
3487
3488 // java.lang.ref.SoftReference
3489
3490 CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J");
3491 CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J");
3492
3493 // java.lang.AssertionStatusDirectives
3494 //
3495 // The CheckAssertionStatusDirectives boolean can be removed from here and
3496 // globals.hpp after the AssertionStatusDirectives class has been integrated
3497 // into merlin "for some time." Without it, the vm will fail with early
3498 // merlin builds.
3499
3500 if (CheckAssertionStatusDirectives && JDK_Version::is_gte_jdk14x_version()) {
3501 const char* nm = "java/lang/AssertionStatusDirectives";
3502 const char* sig = "[Ljava/lang/String;";
3503 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig);
3504 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z");
3505 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig);
3506 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z");
3507 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z");
3508 }
3509
3510 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
3511 }
3512
3513 #endif // PRODUCT
3514
3515 int InjectedField::compute_offset() {
3516 Klass* klass_oop = klass();
3517 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
3518 if (!may_be_java && !fs.access_flags().is_internal()) {
3519 // Only look at injected fields
3520 continue;
3521 }
3522 if (fs.name() == name() && fs.signature() == signature()) {
3523 return fs.offset();
3524 }
3525 }
3526 ResourceMark rm;
3527 tty->print_cr("Invalid layout of %s at %s/%s%s", InstanceKlass::cast(klass_oop)->external_name(), name()->as_C_string(), signature()->as_C_string(), may_be_java ? " (may_be_java)" : "");
3528 #ifndef PRODUCT
3529 klass_oop->print();
3530 tty->print_cr("all fields:");
3531 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
3532 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
3533 }
3534 #endif //PRODUCT
3535 fatal("Invalid layout of preloaded class");
3536 return -1;
3537 }
3538
3539 void javaClasses_init() {
3540 JavaClasses::compute_offsets();
3541 JavaClasses::check_offsets();
3542 FilteredFieldsMap::initialize(); // must be done after computing offsets.
3543 }