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 char* java_lang_String::as_utf8_string(oop java_string, int start, int len, char* buf, int buflen) {
425 typeArrayOop value = java_lang_String::value(java_string);
426 int offset = java_lang_String::offset(java_string);
427 int length = java_lang_String::length(java_string);
428 assert(start + len <= length, "just checking");
429 jchar* position = value->char_at_addr(offset + start);
430 return UNICODE::as_utf8(position, len, buf, buflen);
431 }
432
433 bool java_lang_String::equals(oop java_string, jchar* chars, int len) {
434 assert(java_string->klass() == SystemDictionary::String_klass(),
435 "must be java_string");
436 typeArrayOop value = java_lang_String::value(java_string);
437 int offset = java_lang_String::offset(java_string);
438 int length = java_lang_String::length(java_string);
439 if (length != len) {
440 return false;
441 }
442 for (int i = 0; i < len; i++) {
443 if (value->char_at(i + offset) != chars[i]) {
444 return false;
445 }
446 }
447 return true;
448 }
449
450 bool java_lang_String::equals(oop str1, oop str2) {
451 assert(str1->klass() == SystemDictionary::String_klass(),
452 "must be java String");
453 assert(str2->klass() == SystemDictionary::String_klass(),
454 "must be java String");
455 typeArrayOop value1 = java_lang_String::value(str1);
456 int offset1 = java_lang_String::offset(str1);
457 int length1 = java_lang_String::length(str1);
458 typeArrayOop value2 = java_lang_String::value(str2);
459 int offset2 = java_lang_String::offset(str2);
460 int length2 = java_lang_String::length(str2);
461
462 if (length1 != length2) {
463 return false;
464 }
465 for (int i = 0; i < length1; i++) {
466 if (value1->char_at(i + offset1) != value2->char_at(i + offset2)) {
467 return false;
468 }
469 }
470 return true;
471 }
472
473 void java_lang_String::print(oop java_string, outputStream* st) {
474 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string");
475 typeArrayOop value = java_lang_String::value(java_string);
476
477 if (value == NULL) {
478 // This can happen if, e.g., printing a String
479 // object before its initializer has been called
480 st->print("NULL");
481 return;
482 }
483
484 int offset = java_lang_String::offset(java_string);
485 int length = java_lang_String::length(java_string);
486
487 st->print("\"");
488 for (int index = 0; index < length; index++) {
489 st->print("%c", value->char_at(index + offset));
490 }
491 st->print("\"");
492 }
493
494
495 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
496 assert(mirror.not_null() && fd->is_static(), "just checking");
497 if (fd->has_initial_value()) {
498 BasicType t = fd->field_type();
499 switch (t) {
500 case T_BYTE:
501 mirror()->byte_field_put(fd->offset(), fd->int_initial_value());
502 break;
503 case T_BOOLEAN:
504 mirror()->bool_field_put(fd->offset(), fd->int_initial_value());
505 break;
506 case T_CHAR:
507 mirror()->char_field_put(fd->offset(), fd->int_initial_value());
508 break;
509 case T_SHORT:
510 mirror()->short_field_put(fd->offset(), fd->int_initial_value());
511 break;
512 case T_INT:
513 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
514 break;
515 case T_FLOAT:
516 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
517 break;
518 case T_DOUBLE:
519 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
520 break;
521 case T_LONG:
522 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
523 break;
524 case T_OBJECT:
525 {
526 #ifdef ASSERT
527 TempNewSymbol sym = SymbolTable::new_symbol("Ljava/lang/String;", CHECK);
528 assert(fd->signature() == sym, "just checking");
529 #endif
530 oop string = fd->string_initial_value(CHECK);
531 mirror()->obj_field_put(fd->offset(), string);
532 }
533 break;
534 default:
535 THROW_MSG(vmSymbols::java_lang_ClassFormatError(),
536 "Illegal ConstantValue attribute in class file");
537 }
538 }
539 }
540
541
542 void java_lang_Class::fixup_mirror(KlassHandle k, TRAPS) {
543 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
544
545 // If the offset was read from the shared archive, it was fixed up already
546 if (!k->is_shared()) {
547 if (k->oop_is_instance()) {
548 // During bootstrap, java.lang.Class wasn't loaded so static field
549 // offsets were computed without the size added it. Go back and
550 // update all the static field offsets to included the size.
551 for (JavaFieldStream fs(InstanceKlass::cast(k())); !fs.done(); fs.next()) {
552 if (fs.access_flags().is_static()) {
553 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields();
554 fs.set_offset(real_offset);
555 }
556 }
557 }
558 }
559 create_mirror(k, Handle(NULL), CHECK);
560 }
561
562 void java_lang_Class::initialize_mirror_fields(KlassHandle k,
563 Handle mirror,
564 Handle protection_domain,
565 TRAPS) {
566 // Allocate a simple java object for a lock.
567 // This needs to be a java object because during class initialization
568 // it can be held across a java call.
569 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
570 set_init_lock(mirror(), r);
571
572 // Set protection domain also
573 set_protection_domain(mirror(), protection_domain());
574
575 // Initialize static fields
576 InstanceKlass::cast(k())->do_local_static_fields(&initialize_static_field, mirror, CHECK);
577 }
578
579 void java_lang_Class::create_mirror(KlassHandle k, Handle protection_domain, TRAPS) {
580 assert(k->java_mirror() == NULL, "should only assign mirror once");
581 // Use this moment of initialization to cache modifier_flags also,
582 // to support Class.getModifiers(). Instance classes recalculate
583 // the cached flags after the class file is parsed, but before the
584 // class is put into the system dictionary.
585 int computed_modifiers = k->compute_modifier_flags(CHECK);
586 k->set_modifier_flags(computed_modifiers);
587 // Class_klass has to be loaded because it is used to allocate
588 // the mirror.
589 if (SystemDictionary::Class_klass_loaded()) {
590 // Allocate mirror (java.lang.Class instance)
591 Handle mirror = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK);
592
593 // Setup indirection from mirror->klass
594 if (!k.is_null()) {
595 java_lang_Class::set_klass(mirror(), k());
596 }
597
598 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
599 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
600
601 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
602
603 // It might also have a component mirror. This mirror must already exist.
604 if (k->oop_is_array()) {
605 Handle comp_mirror;
606 if (k->oop_is_typeArray()) {
607 BasicType type = TypeArrayKlass::cast(k())->element_type();
608 comp_mirror = Universe::java_mirror(type);
609 } else {
610 assert(k->oop_is_objArray(), "Must be");
611 Klass* element_klass = ObjArrayKlass::cast(k())->element_klass();
612 assert(element_klass != NULL, "Must have an element klass");
613 comp_mirror = element_klass->java_mirror();
614 }
615 assert(comp_mirror.not_null(), "must have a mirror");
616
617 // Two-way link between the array klass and its component mirror:
618 ArrayKlass::cast(k())->set_component_mirror(comp_mirror());
619 set_array_klass(comp_mirror(), k());
620 } else {
621 assert(k->oop_is_instance(), "Must be");
622
623 initialize_mirror_fields(k, mirror, protection_domain, THREAD);
624 if (HAS_PENDING_EXCEPTION) {
625 // If any of the fields throws an exception like OOM remove the klass field
626 // from the mirror so GC doesn't follow it after the klass has been deallocated.
627 // This mirror looks like a primitive type, which logically it is because it
628 // it represents no class.
629 java_lang_Class::set_klass(mirror(), NULL);
630 return;
631 }
632 }
633
634 // Setup indirection from klass->mirror last
635 // after any exceptions can happen during allocations.
636 if (!k.is_null()) {
637 k->set_java_mirror(mirror());
638 }
639 } else {
640 if (fixup_mirror_list() == NULL) {
641 GrowableArray<Klass*>* list =
642 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true);
643 set_fixup_mirror_list(list);
644 }
645 fixup_mirror_list()->push(k());
646 }
647 }
648
649
650 int java_lang_Class::oop_size(oop java_class) {
651 assert(_oop_size_offset != 0, "must be set");
652 return java_class->int_field(_oop_size_offset);
653 }
654 void java_lang_Class::set_oop_size(oop java_class, int size) {
655 assert(_oop_size_offset != 0, "must be set");
656 java_class->int_field_put(_oop_size_offset, size);
657 }
658 int java_lang_Class::static_oop_field_count(oop java_class) {
659 assert(_static_oop_field_count_offset != 0, "must be set");
660 return java_class->int_field(_static_oop_field_count_offset);
661 }
662 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
663 assert(_static_oop_field_count_offset != 0, "must be set");
664 java_class->int_field_put(_static_oop_field_count_offset, size);
665 }
666
667 oop java_lang_Class::protection_domain(oop java_class) {
668 assert(_protection_domain_offset != 0, "must be set");
669 return java_class->obj_field(_protection_domain_offset);
670 }
671 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
672 assert(_protection_domain_offset != 0, "must be set");
673 java_class->obj_field_put(_protection_domain_offset, pd);
674 }
675
676 oop java_lang_Class::init_lock(oop java_class) {
677 assert(_init_lock_offset != 0, "must be set");
678 return java_class->obj_field(_init_lock_offset);
679 }
680 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
681 assert(_init_lock_offset != 0, "must be set");
682 java_class->obj_field_put(_init_lock_offset, init_lock);
683 }
684
685 objArrayOop java_lang_Class::signers(oop java_class) {
686 assert(_signers_offset != 0, "must be set");
687 return (objArrayOop)java_class->obj_field(_signers_offset);
688 }
689 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) {
690 assert(_signers_offset != 0, "must be set");
691 java_class->obj_field_put(_signers_offset, (oop)signers);
692 }
693
694
695 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
696 // This should be improved by adding a field at the Java level or by
697 // introducing a new VM klass (see comment in ClassFileParser)
698 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0);
699 if (type != T_VOID) {
700 Klass* aklass = Universe::typeArrayKlassObj(type);
701 assert(aklass != NULL, "correct bootstrap");
702 set_array_klass(java_class, aklass);
703 }
704 #ifdef ASSERT
705 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass());
706 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
707 #endif
708 return java_class;
709 }
710
711
712 Klass* java_lang_Class::as_Klass(oop java_class) {
713 //%note memory_2
714 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
715 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset));
716 assert(k == NULL || k->is_klass(), "type check");
717 return k;
718 }
719
720
721 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
722 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
723 java_class->metadata_field_put(_klass_offset, klass);
724 }
725
726
727 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
728 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
729 Symbol* name = NULL;
730 bool is_instance = false;
731 if (is_primitive(java_class)) {
732 name = vmSymbols::type_signature(primitive_type(java_class));
733 } else {
734 Klass* k = as_Klass(java_class);
735 is_instance = k->oop_is_instance();
736 name = k->name();
737 }
738 if (name == NULL) {
739 st->print("<null>");
740 return;
741 }
742 if (is_instance) st->print("L");
743 st->write((char*) name->base(), (int) name->utf8_length());
744 if (is_instance) st->print(";");
745 }
746
747 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) {
748 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
749 Symbol* name;
750 if (is_primitive(java_class)) {
751 name = vmSymbols::type_signature(primitive_type(java_class));
752 // Because this can create a new symbol, the caller has to decrement
753 // the refcount, so make adjustment here and below for symbols returned
754 // that are not created or incremented due to a successful lookup.
755 name->increment_refcount();
756 } else {
757 Klass* k = as_Klass(java_class);
758 if (!k->oop_is_instance()) {
759 name = k->name();
760 name->increment_refcount();
761 } else {
762 ResourceMark rm;
763 const char* sigstr = k->signature_name();
764 int siglen = (int) strlen(sigstr);
765 if (!intern_if_not_found) {
766 name = SymbolTable::probe(sigstr, siglen);
767 } else {
768 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
769 }
770 }
771 }
772 return name;
773 }
774
775
776 Klass* java_lang_Class::array_klass(oop java_class) {
777 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
778 assert(k == NULL || k->is_klass() && k->oop_is_array(), "should be array klass");
779 return k;
780 }
781
782
783 void java_lang_Class::set_array_klass(oop java_class, Klass* klass) {
784 assert(klass->is_klass() && klass->oop_is_array(), "should be array klass");
785 java_class->metadata_field_put(_array_klass_offset, klass);
786 }
787
788
789 bool java_lang_Class::is_primitive(oop java_class) {
790 // should assert:
791 //assert(java_lang_Class::is_instance(java_class), "must be a Class object");
792 bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL);
793
794 #ifdef ASSERT
795 if (is_primitive) {
796 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
797 assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()),
798 "Should be either the T_VOID primitive or a java primitive");
799 }
800 #endif
801
802 return is_primitive;
803 }
804
805
806 BasicType java_lang_Class::primitive_type(oop java_class) {
807 assert(java_lang_Class::is_primitive(java_class), "just checking");
808 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
809 BasicType type = T_VOID;
810 if (ak != NULL) {
811 // Note: create_basic_type_mirror above initializes ak to a non-null value.
812 type = ArrayKlass::cast(ak)->element_type();
813 } else {
814 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
815 }
816 assert(Universe::java_mirror(type) == java_class, "must be consistent");
817 return type;
818 }
819
820 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
821 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
822 if (is_primitive(java_class)) {
823 if (reference_klass != NULL)
824 (*reference_klass) = NULL;
825 return primitive_type(java_class);
826 } else {
827 if (reference_klass != NULL)
828 (*reference_klass) = as_Klass(java_class);
829 return T_OBJECT;
830 }
831 }
832
833
834 oop java_lang_Class::primitive_mirror(BasicType t) {
835 oop mirror = Universe::java_mirror(t);
836 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class");
837 assert(java_lang_Class::is_primitive(mirror), "must be primitive");
838 return mirror;
839 }
840
841 bool java_lang_Class::offsets_computed = false;
842 int java_lang_Class::classRedefinedCount_offset = -1;
843
844 void java_lang_Class::compute_offsets() {
845 assert(!offsets_computed, "offsets should be initialized only once");
846 offsets_computed = true;
847
848 Klass* klass_oop = SystemDictionary::Class_klass();
849 // The classRedefinedCount field is only present starting in 1.5,
850 // so don't go fatal.
851 compute_optional_offset(classRedefinedCount_offset,
852 klass_oop, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature());
853
854 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
855 }
856
857 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
858 if (!JDK_Version::is_gte_jdk15x_version()
859 || classRedefinedCount_offset == -1) {
860 // The classRedefinedCount field is only present starting in 1.5.
861 // If we don't have an offset for it then just return -1 as a marker.
862 return -1;
863 }
864
865 return the_class_mirror->int_field(classRedefinedCount_offset);
866 }
867
868 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
869 if (!JDK_Version::is_gte_jdk15x_version()
870 || classRedefinedCount_offset == -1) {
871 // The classRedefinedCount field is only present starting in 1.5.
872 // If we don't have an offset for it then nothing to set.
873 return;
874 }
875
876 the_class_mirror->int_field_put(classRedefinedCount_offset, value);
877 }
878
879
880 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
881 // platform thread structure, and a eetop offset which was used for thread
882 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
883 // merged, so in the HotSpot VM we just use the eetop field for the thread
884 // instead of the privateInfo_offset.
885 //
886 // Note: The stackSize field is only present starting in 1.4.
887
888 int java_lang_Thread::_name_offset = 0;
889 int java_lang_Thread::_group_offset = 0;
890 int java_lang_Thread::_contextClassLoader_offset = 0;
891 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
892 int java_lang_Thread::_priority_offset = 0;
893 int java_lang_Thread::_eetop_offset = 0;
894 int java_lang_Thread::_daemon_offset = 0;
895 int java_lang_Thread::_stillborn_offset = 0;
896 int java_lang_Thread::_stackSize_offset = 0;
897 int java_lang_Thread::_tid_offset = 0;
898 int java_lang_Thread::_thread_status_offset = 0;
899 int java_lang_Thread::_park_blocker_offset = 0;
900 int java_lang_Thread::_park_event_offset = 0 ;
901
902
903 void java_lang_Thread::compute_offsets() {
904 assert(_group_offset == 0, "offsets should be initialized only once");
905
906 Klass* k = SystemDictionary::Thread_klass();
907 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::char_array_signature());
908 compute_offset(_group_offset, k, vmSymbols::group_name(), vmSymbols::threadgroup_signature());
909 compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature());
910 compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature());
911 compute_offset(_priority_offset, k, vmSymbols::priority_name(), vmSymbols::int_signature());
912 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
913 compute_offset(_eetop_offset, k, vmSymbols::eetop_name(), vmSymbols::long_signature());
914 compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature());
915 // The stackSize field is only present starting in 1.4, so don't go fatal.
916 compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature());
917 // The tid and thread_status fields are only present starting in 1.5, so don't go fatal.
918 compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature());
919 compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature());
920 // The parkBlocker field is only present starting in 1.6, so don't go fatal.
921 compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature());
922 compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(),
923 vmSymbols::long_signature());
924 }
925
926
927 JavaThread* java_lang_Thread::thread(oop java_thread) {
928 return (JavaThread*)java_thread->address_field(_eetop_offset);
929 }
930
931
932 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
933 java_thread->address_field_put(_eetop_offset, (address)thread);
934 }
935
936
937 typeArrayOop java_lang_Thread::name(oop java_thread) {
938 oop name = java_thread->obj_field(_name_offset);
939 assert(name == NULL || (name->is_typeArray() && TypeArrayKlass::cast(name->klass())->element_type() == T_CHAR), "just checking");
940 return typeArrayOop(name);
941 }
942
943
944 void java_lang_Thread::set_name(oop java_thread, typeArrayOop name) {
945 assert(java_thread->obj_field(_name_offset) == NULL, "name should be NULL");
946 java_thread->obj_field_put(_name_offset, name);
947 }
948
949
950 ThreadPriority java_lang_Thread::priority(oop java_thread) {
951 return (ThreadPriority)java_thread->int_field(_priority_offset);
952 }
953
954
955 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
956 java_thread->int_field_put(_priority_offset, priority);
957 }
958
959
960 oop java_lang_Thread::threadGroup(oop java_thread) {
961 return java_thread->obj_field(_group_offset);
962 }
963
964
965 bool java_lang_Thread::is_stillborn(oop java_thread) {
966 return java_thread->bool_field(_stillborn_offset) != 0;
967 }
968
969
970 // We never have reason to turn the stillborn bit off
971 void java_lang_Thread::set_stillborn(oop java_thread) {
972 java_thread->bool_field_put(_stillborn_offset, true);
973 }
974
975
976 bool java_lang_Thread::is_alive(oop java_thread) {
977 JavaThread* thr = java_lang_Thread::thread(java_thread);
978 return (thr != NULL);
979 }
980
981
982 bool java_lang_Thread::is_daemon(oop java_thread) {
983 return java_thread->bool_field(_daemon_offset) != 0;
984 }
985
986
987 void java_lang_Thread::set_daemon(oop java_thread) {
988 java_thread->bool_field_put(_daemon_offset, true);
989 }
990
991 oop java_lang_Thread::context_class_loader(oop java_thread) {
992 return java_thread->obj_field(_contextClassLoader_offset);
993 }
994
995 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
996 return java_thread->obj_field(_inheritedAccessControlContext_offset);
997 }
998
999
1000 jlong java_lang_Thread::stackSize(oop java_thread) {
1001 // The stackSize field is only present starting in 1.4
1002 if (_stackSize_offset > 0) {
1003 assert(JDK_Version::is_gte_jdk14x_version(), "sanity check");
1004 return java_thread->long_field(_stackSize_offset);
1005 } else {
1006 return 0;
1007 }
1008 }
1009
1010 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1011 void java_lang_Thread::set_thread_status(oop java_thread,
1012 java_lang_Thread::ThreadStatus status) {
1013 // The threadStatus is only present starting in 1.5
1014 if (_thread_status_offset > 0) {
1015 java_thread->int_field_put(_thread_status_offset, status);
1016 }
1017 }
1018
1019 // Read thread status value from threadStatus field in java.lang.Thread java class.
1020 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1021 assert(Thread::current()->is_Watcher_thread() || Thread::current()->is_VM_thread() ||
1022 JavaThread::current()->thread_state() == _thread_in_vm,
1023 "Java Thread is not running in vm");
1024 // The threadStatus is only present starting in 1.5
1025 if (_thread_status_offset > 0) {
1026 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1027 } else {
1028 // All we can easily figure out is if it is alive, but that is
1029 // enough info for a valid unknown status.
1030 // These aren't restricted to valid set ThreadStatus values, so
1031 // use JVMTI values and cast.
1032 JavaThread* thr = java_lang_Thread::thread(java_thread);
1033 if (thr == NULL) {
1034 // the thread hasn't run yet or is in the process of exiting
1035 return NEW;
1036 }
1037 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE;
1038 }
1039 }
1040
1041
1042 jlong java_lang_Thread::thread_id(oop java_thread) {
1043 // The thread ID field is only present starting in 1.5
1044 if (_tid_offset > 0) {
1045 return java_thread->long_field(_tid_offset);
1046 } else {
1047 return 0;
1048 }
1049 }
1050
1051 oop java_lang_Thread::park_blocker(oop java_thread) {
1052 assert(JDK_Version::current().supports_thread_park_blocker() &&
1053 _park_blocker_offset != 0, "Must support parkBlocker field");
1054
1055 if (_park_blocker_offset > 0) {
1056 return java_thread->obj_field(_park_blocker_offset);
1057 }
1058
1059 return NULL;
1060 }
1061
1062 jlong java_lang_Thread::park_event(oop java_thread) {
1063 if (_park_event_offset > 0) {
1064 return java_thread->long_field(_park_event_offset);
1065 }
1066 return 0;
1067 }
1068
1069 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) {
1070 if (_park_event_offset > 0) {
1071 java_thread->long_field_put(_park_event_offset, ptr);
1072 return true;
1073 }
1074 return false;
1075 }
1076
1077
1078 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1079 assert(JDK_Version::is_gte_jdk15x_version() && _thread_status_offset != 0, "Must have thread status");
1080 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1081 switch (status) {
1082 case NEW : return "NEW";
1083 case RUNNABLE : return "RUNNABLE";
1084 case SLEEPING : return "TIMED_WAITING (sleeping)";
1085 case IN_OBJECT_WAIT : return "WAITING (on object monitor)";
1086 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
1087 case PARKED : return "WAITING (parking)";
1088 case PARKED_TIMED : return "TIMED_WAITING (parking)";
1089 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1090 case TERMINATED : return "TERMINATED";
1091 default : return "UNKNOWN";
1092 };
1093 }
1094 int java_lang_ThreadGroup::_parent_offset = 0;
1095 int java_lang_ThreadGroup::_name_offset = 0;
1096 int java_lang_ThreadGroup::_threads_offset = 0;
1097 int java_lang_ThreadGroup::_groups_offset = 0;
1098 int java_lang_ThreadGroup::_maxPriority_offset = 0;
1099 int java_lang_ThreadGroup::_destroyed_offset = 0;
1100 int java_lang_ThreadGroup::_daemon_offset = 0;
1101 int java_lang_ThreadGroup::_vmAllowSuspension_offset = 0;
1102 int java_lang_ThreadGroup::_nthreads_offset = 0;
1103 int java_lang_ThreadGroup::_ngroups_offset = 0;
1104
1105 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
1106 assert(java_thread_group->is_oop(), "thread group must be oop");
1107 return java_thread_group->obj_field(_parent_offset);
1108 }
1109
1110 // ("name as oop" accessor is not necessary)
1111
1112 typeArrayOop java_lang_ThreadGroup::name(oop java_thread_group) {
1113 oop name = java_thread_group->obj_field(_name_offset);
1114 // ThreadGroup.name can be null
1115 return name == NULL ? (typeArrayOop)NULL : java_lang_String::value(name);
1116 }
1117
1118 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
1119 assert(java_thread_group->is_oop(), "thread group must be oop");
1120 return java_thread_group->int_field(_nthreads_offset);
1121 }
1122
1123 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
1124 oop threads = java_thread_group->obj_field(_threads_offset);
1125 assert(threads != NULL, "threadgroups should have threads");
1126 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
1127 return objArrayOop(threads);
1128 }
1129
1130 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
1131 assert(java_thread_group->is_oop(), "thread group must be oop");
1132 return java_thread_group->int_field(_ngroups_offset);
1133 }
1134
1135 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
1136 oop groups = java_thread_group->obj_field(_groups_offset);
1137 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
1138 return objArrayOop(groups);
1139 }
1140
1141 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1142 assert(java_thread_group->is_oop(), "thread group must be oop");
1143 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1144 }
1145
1146 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
1147 assert(java_thread_group->is_oop(), "thread group must be oop");
1148 return java_thread_group->bool_field(_destroyed_offset) != 0;
1149 }
1150
1151 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1152 assert(java_thread_group->is_oop(), "thread group must be oop");
1153 return java_thread_group->bool_field(_daemon_offset) != 0;
1154 }
1155
1156 bool java_lang_ThreadGroup::is_vmAllowSuspension(oop java_thread_group) {
1157 assert(java_thread_group->is_oop(), "thread group must be oop");
1158 return java_thread_group->bool_field(_vmAllowSuspension_offset) != 0;
1159 }
1160
1161 void java_lang_ThreadGroup::compute_offsets() {
1162 assert(_parent_offset == 0, "offsets should be initialized only once");
1163
1164 Klass* k = SystemDictionary::ThreadGroup_klass();
1165
1166 compute_offset(_parent_offset, k, vmSymbols::parent_name(), vmSymbols::threadgroup_signature());
1167 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1168 compute_offset(_threads_offset, k, vmSymbols::threads_name(), vmSymbols::thread_array_signature());
1169 compute_offset(_groups_offset, k, vmSymbols::groups_name(), vmSymbols::threadgroup_array_signature());
1170 compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature());
1171 compute_offset(_destroyed_offset, k, vmSymbols::destroyed_name(), vmSymbols::bool_signature());
1172 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
1173 compute_offset(_vmAllowSuspension_offset, k, vmSymbols::vmAllowSuspension_name(), vmSymbols::bool_signature());
1174 compute_offset(_nthreads_offset, k, vmSymbols::nthreads_name(), vmSymbols::int_signature());
1175 compute_offset(_ngroups_offset, k, vmSymbols::ngroups_name(), vmSymbols::int_signature());
1176 }
1177
1178 oop java_lang_Throwable::unassigned_stacktrace() {
1179 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Throwable_klass());
1180 address addr = ik->static_field_addr(static_unassigned_stacktrace_offset);
1181 if (UseCompressedOops) {
1182 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
1183 } else {
1184 return oopDesc::load_decode_heap_oop((oop*)addr);
1185 }
1186 }
1187
1188 oop java_lang_Throwable::backtrace(oop throwable) {
1189 return throwable->obj_field_acquire(backtrace_offset);
1190 }
1191
1192
1193 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
1194 throwable->release_obj_field_put(backtrace_offset, value);
1195 }
1196
1197
1198 oop java_lang_Throwable::message(oop throwable) {
1199 return throwable->obj_field(detailMessage_offset);
1200 }
1201
1202
1203 oop java_lang_Throwable::message(Handle throwable) {
1204 return throwable->obj_field(detailMessage_offset);
1205 }
1206
1207
1208 void java_lang_Throwable::set_message(oop throwable, oop value) {
1209 throwable->obj_field_put(detailMessage_offset, value);
1210 }
1211
1212
1213 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
1214 throwable->obj_field_put(stackTrace_offset, st_element_array);
1215 }
1216
1217 void java_lang_Throwable::clear_stacktrace(oop throwable) {
1218 assert(JDK_Version::is_gte_jdk14x_version(), "should only be called in >= 1.4");
1219 set_stacktrace(throwable, NULL);
1220 }
1221
1222
1223 void java_lang_Throwable::print(oop throwable, outputStream* st) {
1224 ResourceMark rm;
1225 Klass* k = throwable->klass();
1226 assert(k != NULL, "just checking");
1227 st->print("%s", InstanceKlass::cast(k)->external_name());
1228 oop msg = message(throwable);
1229 if (msg != NULL) {
1230 st->print(": %s", java_lang_String::as_utf8_string(msg));
1231 }
1232 }
1233
1234
1235 void java_lang_Throwable::print(Handle throwable, outputStream* st) {
1236 ResourceMark rm;
1237 Klass* k = throwable->klass();
1238 assert(k != NULL, "just checking");
1239 st->print("%s", InstanceKlass::cast(k)->external_name());
1240 oop msg = message(throwable);
1241 if (msg != NULL) {
1242 st->print(": %s", java_lang_String::as_utf8_string(msg));
1243 }
1244 }
1245
1246 // After this many redefines, the stack trace is unreliable.
1247 const int MAX_VERSION = USHRT_MAX;
1248
1249 // Helper backtrace functions to store bci|version together.
1250 static inline int merge_bci_and_version(int bci, int version) {
1251 // only store u2 for version, checking for overflow.
1252 if (version > USHRT_MAX || version < 0) version = MAX_VERSION;
1253 assert((jushort)bci == bci, "bci should be short");
1254 return build_int_from_shorts(version, bci);
1255 }
1256
1257 static inline int bci_at(unsigned int merged) {
1258 return extract_high_short_from_int(merged);
1259 }
1260 static inline int version_at(unsigned int merged) {
1261 return extract_low_short_from_int(merged);
1262 }
1263
1264 static inline bool version_matches(Method* method, int version) {
1265 return (method->constants()->version() == version && version < MAX_VERSION);
1266 }
1267
1268 static inline int get_line_number(Method* method, int bci) {
1269 int line_number = 0;
1270 if (method->is_native()) {
1271 // Negative value different from -1 below, enabling Java code in
1272 // class java.lang.StackTraceElement to distinguish "native" from
1273 // "no LineNumberTable". JDK tests for -2.
1274 line_number = -2;
1275 } else {
1276 // Returns -1 if no LineNumberTable, and otherwise actual line number
1277 line_number = method->line_number_from_bci(bci);
1278 if (line_number == -1 && ShowHiddenFrames) {
1279 line_number = bci + 1000000;
1280 }
1281 }
1282 return line_number;
1283 }
1284
1285 // This class provides a simple wrapper over the internal structure of
1286 // exception backtrace to insulate users of the backtrace from needing
1287 // to know what it looks like.
1288 class BacktraceBuilder: public StackObj {
1289 private:
1290 Handle _backtrace;
1291 objArrayOop _head;
1292 typeArrayOop _methods;
1293 typeArrayOop _bcis;
1294 objArrayOop _mirrors;
1295 int _index;
1296 No_Safepoint_Verifier _nsv;
1297
1298 public:
1299
1300 enum {
1301 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
1302 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
1303 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
1304 trace_next_offset = java_lang_Throwable::trace_next_offset,
1305 trace_size = java_lang_Throwable::trace_size,
1306 trace_chunk_size = java_lang_Throwable::trace_chunk_size
1307 };
1308
1309 // get info out of chunks
1310 static typeArrayOop get_methods(objArrayHandle chunk) {
1311 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
1312 assert(methods != NULL, "method array should be initialized in backtrace");
1313 return methods;
1314 }
1315 static typeArrayOop get_bcis(objArrayHandle chunk) {
1316 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1317 assert(bcis != NULL, "bci array should be initialized in backtrace");
1318 return bcis;
1319 }
1320 static objArrayOop get_mirrors(objArrayHandle chunk) {
1321 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
1322 assert(mirrors != NULL, "mirror array should be initialized in backtrace");
1323 return mirrors;
1324 }
1325
1326 // constructor for new backtrace
1327 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _mirrors(NULL) {
1328 expand(CHECK);
1329 _backtrace = _head;
1330 _index = 0;
1331 }
1332
1333 BacktraceBuilder(objArrayHandle backtrace) {
1334 _methods = get_methods(backtrace);
1335 _bcis = get_bcis(backtrace);
1336 _mirrors = get_mirrors(backtrace);
1337 assert(_methods->length() == _bcis->length() &&
1338 _methods->length() == _mirrors->length(),
1339 "method and source information arrays should match");
1340
1341 // head is the preallocated backtrace
1342 _backtrace = _head = backtrace();
1343 _index = 0;
1344 }
1345
1346 void expand(TRAPS) {
1347 objArrayHandle old_head(THREAD, _head);
1348 Pause_No_Safepoint_Verifier pnsv(&_nsv);
1349
1350 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
1351 objArrayHandle new_head(THREAD, head);
1352
1353 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1354 typeArrayHandle new_methods(THREAD, methods);
1355
1356 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
1357 typeArrayHandle new_bcis(THREAD, bcis);
1358
1359 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
1360 objArrayHandle new_mirrors(THREAD, mirrors);
1361
1362 if (!old_head.is_null()) {
1363 old_head->obj_at_put(trace_next_offset, new_head());
1364 }
1365 new_head->obj_at_put(trace_methods_offset, new_methods());
1366 new_head->obj_at_put(trace_bcis_offset, new_bcis());
1367 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
1368
1369 _head = new_head();
1370 _methods = new_methods();
1371 _bcis = new_bcis();
1372 _mirrors = new_mirrors();
1373 _index = 0;
1374 }
1375
1376 oop backtrace() {
1377 return _backtrace();
1378 }
1379
1380 inline void push(Method* method, int bci, TRAPS) {
1381 // Smear the -1 bci to 0 since the array only holds unsigned
1382 // shorts. The later line number lookup would just smear the -1
1383 // to a 0 even if it could be recorded.
1384 if (bci == SynchronizationEntryBCI) bci = 0;
1385
1386 if (_index >= trace_chunk_size) {
1387 methodHandle mhandle(THREAD, method);
1388 expand(CHECK);
1389 method = mhandle();
1390 }
1391
1392 _methods->short_at_put(_index, method->method_idnum());
1393 _bcis->int_at_put(_index, merge_bci_and_version(bci, method->constants()->version()));
1394
1395 // We need to save the mirrors in the backtrace to keep the class
1396 // from being unloaded while we still have this stack trace.
1397 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror");
1398 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
1399 _index++;
1400 }
1401
1402 };
1403
1404 // Print stack trace element to resource allocated buffer
1405 char* java_lang_Throwable::print_stack_element_to_buffer(Handle mirror,
1406 int method_id, int version, int bci) {
1407
1408 // Get strings and string lengths
1409 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
1410 const char* klass_name = holder->external_name();
1411 int buf_len = (int)strlen(klass_name);
1412
1413 // The method id may point to an obsolete method, can't get more stack information
1414 Method* method = holder->method_with_idnum(method_id);
1415 if (method == NULL) {
1416 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
1417 // This is what the java code prints in this case - added Redefined
1418 sprintf(buf, "\tat %s.null (Redefined)", klass_name);
1419 return buf;
1420 }
1421
1422 char* method_name = method->name()->as_C_string();
1423 buf_len += (int)strlen(method_name);
1424
1425 char* source_file_name = NULL;
1426 if (version_matches(method, version)) {
1427 Symbol* source = holder->source_file_name();
1428 if (source != NULL) {
1429 source_file_name = source->as_C_string();
1430 buf_len += (int)strlen(source_file_name);
1431 }
1432 }
1433
1434 // Allocate temporary buffer with extra space for formatting and line number
1435 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
1436
1437 // Print stack trace line in buffer
1438 sprintf(buf, "\tat %s.%s", klass_name, method_name);
1439
1440 if (!version_matches(method, version)) {
1441 strcat(buf, "(Redefined)");
1442 } else {
1443 int line_number = get_line_number(method, bci);
1444 if (line_number == -2) {
1445 strcat(buf, "(Native Method)");
1446 } else {
1447 if (source_file_name != NULL && (line_number != -1)) {
1448 // Sourcename and linenumber
1449 sprintf(buf + (int)strlen(buf), "(%s:%d)", source_file_name, line_number);
1450 } else if (source_file_name != NULL) {
1451 // Just sourcename
1452 sprintf(buf + (int)strlen(buf), "(%s)", source_file_name);
1453 } else {
1454 // Neither sourcename nor linenumber
1455 sprintf(buf + (int)strlen(buf), "(Unknown Source)");
1456 }
1457 nmethod* nm = method->code();
1458 if (WizardMode && nm != NULL) {
1459 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
1460 }
1461 }
1462 }
1463
1464 return buf;
1465 }
1466
1467 void java_lang_Throwable::print_stack_element(outputStream *st, Handle mirror,
1468 int method_id, int version, int bci) {
1469 ResourceMark rm;
1470 char* buf = print_stack_element_to_buffer(mirror, method_id, version, bci);
1471 st->print_cr("%s", buf);
1472 }
1473
1474 void java_lang_Throwable::print_stack_element(outputStream *st, methodHandle method, int bci) {
1475 Handle mirror = method->method_holder()->java_mirror();
1476 int method_id = method->method_idnum();
1477 int version = method->constants()->version();
1478 print_stack_element(st, mirror, method_id, version, bci);
1479 }
1480
1481 const char* java_lang_Throwable::no_stack_trace_message() {
1482 return "\t<<no stack trace available>>";
1483 }
1484
1485
1486 // Currently used only for exceptions occurring during startup
1487 void java_lang_Throwable::print_stack_trace(oop throwable, outputStream* st) {
1488 Thread *THREAD = Thread::current();
1489 Handle h_throwable(THREAD, throwable);
1490 while (h_throwable.not_null()) {
1491 objArrayHandle result (THREAD, objArrayOop(backtrace(h_throwable())));
1492 if (result.is_null()) {
1493 st->print_cr(no_stack_trace_message());
1494 return;
1495 }
1496
1497 while (result.not_null()) {
1498
1499 // Get method id, bci, version and mirror from chunk
1500 typeArrayHandle methods (THREAD, BacktraceBuilder::get_methods(result));
1501 typeArrayHandle bcis (THREAD, BacktraceBuilder::get_bcis(result));
1502 objArrayHandle mirrors (THREAD, BacktraceBuilder::get_mirrors(result));
1503
1504 int length = methods()->length();
1505 for (int index = 0; index < length; index++) {
1506 Handle mirror(THREAD, mirrors->obj_at(index));
1507 // NULL mirror means end of stack trace
1508 if (mirror.is_null()) goto handle_cause;
1509 int method = methods->short_at(index);
1510 int version = version_at(bcis->int_at(index));
1511 int bci = bci_at(bcis->int_at(index));
1512 print_stack_element(st, mirror, method, version, bci);
1513 }
1514 result = objArrayHandle(THREAD, objArrayOop(result->obj_at(trace_next_offset)));
1515 }
1516 handle_cause:
1517 {
1518 EXCEPTION_MARK;
1519 JavaValue cause(T_OBJECT);
1520 JavaCalls::call_virtual(&cause,
1521 h_throwable,
1522 KlassHandle(THREAD, h_throwable->klass()),
1523 vmSymbols::getCause_name(),
1524 vmSymbols::void_throwable_signature(),
1525 THREAD);
1526 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
1527 if (HAS_PENDING_EXCEPTION) {
1528 CLEAR_PENDING_EXCEPTION;
1529 h_throwable = Handle();
1530 } else {
1531 h_throwable = Handle(THREAD, (oop) cause.get_jobject());
1532 if (h_throwable.not_null()) {
1533 st->print("Caused by: ");
1534 print(h_throwable, st);
1535 st->cr();
1536 }
1537 }
1538 }
1539 }
1540 }
1541
1542 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method, TRAPS) {
1543 if (!StackTraceInThrowable) return;
1544 ResourceMark rm(THREAD);
1545
1546 // Start out by clearing the backtrace for this object, in case the VM
1547 // runs out of memory while allocating the stack trace
1548 set_backtrace(throwable(), NULL);
1549 if (JDK_Version::is_gte_jdk14x_version()) {
1550 // New since 1.4, clear lazily constructed Java level stacktrace if
1551 // refilling occurs
1552 // This is unnecessary in 1.7+ but harmless
1553 clear_stacktrace(throwable());
1554 }
1555
1556 int max_depth = MaxJavaStackTraceDepth;
1557 JavaThread* thread = (JavaThread*)THREAD;
1558 BacktraceBuilder bt(CHECK);
1559
1560 // If there is no Java frame just return the method that was being called
1561 // with bci 0
1562 if (!thread->has_last_Java_frame()) {
1563 if (max_depth >= 1 && method() != NULL) {
1564 bt.push(method(), 0, CHECK);
1565 set_backtrace(throwable(), bt.backtrace());
1566 }
1567 return;
1568 }
1569
1570 // Instead of using vframe directly, this version of fill_in_stack_trace
1571 // basically handles everything by hand. This significantly improved the
1572 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
1573 // See bug 6333838 for more details.
1574 // The "ASSERT" here is to verify this method generates the exactly same stack
1575 // trace as utilizing vframe.
1576 #ifdef ASSERT
1577 vframeStream st(thread);
1578 methodHandle st_method(THREAD, st.method());
1579 #endif
1580 int total_count = 0;
1581 RegisterMap map(thread, false);
1582 int decode_offset = 0;
1583 nmethod* nm = NULL;
1584 bool skip_fillInStackTrace_check = false;
1585 bool skip_throwableInit_check = false;
1586 bool skip_hidden = !ShowHiddenFrames;
1587
1588 for (frame fr = thread->last_frame(); max_depth != total_count;) {
1589 Method* method = NULL;
1590 int bci = 0;
1591
1592 // Compiled java method case.
1593 if (decode_offset != 0) {
1594 DebugInfoReadStream stream(nm, decode_offset);
1595 decode_offset = stream.read_int();
1596 method = (Method*)nm->metadata_at(stream.read_int());
1597 bci = stream.read_bci();
1598 } else {
1599 if (fr.is_first_frame()) break;
1600 address pc = fr.pc();
1601 if (fr.is_interpreted_frame()) {
1602 intptr_t bcx = fr.interpreter_frame_bcx();
1603 method = fr.interpreter_frame_method();
1604 bci = fr.is_bci(bcx) ? bcx : method->bci_from((address)bcx);
1605 fr = fr.sender(&map);
1606 } else {
1607 CodeBlob* cb = fr.cb();
1608 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
1609 // but non nmethod
1610 fr = fr.sender(&map);
1611 if (cb == NULL || !cb->is_nmethod()) {
1612 continue;
1613 }
1614 nm = (nmethod*)cb;
1615 if (nm->method()->is_native()) {
1616 method = nm->method();
1617 bci = 0;
1618 } else {
1619 PcDesc* pd = nm->pc_desc_at(pc);
1620 decode_offset = pd->scope_decode_offset();
1621 // if decode_offset is not equal to 0, it will execute the
1622 // "compiled java method case" at the beginning of the loop.
1623 continue;
1624 }
1625 }
1626 }
1627 #ifdef ASSERT
1628 assert(st_method() == method && st.bci() == bci,
1629 "Wrong stack trace");
1630 st.next();
1631 // vframeStream::method isn't GC-safe so store off a copy
1632 // of the Method* in case we GC.
1633 if (!st.at_end()) {
1634 st_method = st.method();
1635 }
1636 #endif
1637
1638 // the format of the stacktrace will be:
1639 // - 1 or more fillInStackTrace frames for the exception class (skipped)
1640 // - 0 or more <init> methods for the exception class (skipped)
1641 // - rest of the stack
1642
1643 if (!skip_fillInStackTrace_check) {
1644 if ((method->name() == vmSymbols::fillInStackTrace_name() ||
1645 method->name() == vmSymbols::fillInStackTrace0_name()) &&
1646 throwable->is_a(method->method_holder())) {
1647 continue;
1648 }
1649 else {
1650 skip_fillInStackTrace_check = true; // gone past them all
1651 }
1652 }
1653 if (!skip_throwableInit_check) {
1654 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
1655
1656 // skip <init> methods of the exception class and superclasses
1657 // This is simlar to classic VM.
1658 if (method->name() == vmSymbols::object_initializer_name() &&
1659 throwable->is_a(method->method_holder())) {
1660 continue;
1661 } else {
1662 // there are none or we've seen them all - either way stop checking
1663 skip_throwableInit_check = true;
1664 }
1665 }
1666 if (method->is_hidden()) {
1667 if (skip_hidden) continue;
1668 }
1669 bt.push(method, bci, CHECK);
1670 total_count++;
1671 }
1672
1673 // Put completed stack trace into throwable object
1674 set_backtrace(throwable(), bt.backtrace());
1675 }
1676
1677 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method) {
1678 // No-op if stack trace is disabled
1679 if (!StackTraceInThrowable) {
1680 return;
1681 }
1682
1683 // Disable stack traces for some preallocated out of memory errors
1684 if (!Universe::should_fill_in_stack_trace(throwable)) {
1685 return;
1686 }
1687
1688 PRESERVE_EXCEPTION_MARK;
1689
1690 JavaThread* thread = JavaThread::active();
1691 fill_in_stack_trace(throwable, method, thread);
1692 // ignore exceptions thrown during stack trace filling
1693 CLEAR_PENDING_EXCEPTION;
1694 }
1695
1696 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
1697 // Allocate stack trace - backtrace is created but not filled in
1698
1699 // No-op if stack trace is disabled
1700 if (!StackTraceInThrowable) return;
1701 BacktraceBuilder bt(CHECK); // creates a backtrace
1702 set_backtrace(throwable(), bt.backtrace());
1703 }
1704
1705
1706 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
1707 // Fill in stack trace into preallocated backtrace (no GC)
1708
1709 // No-op if stack trace is disabled
1710 if (!StackTraceInThrowable) return;
1711
1712 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
1713
1714 JavaThread* THREAD = JavaThread::current();
1715
1716 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
1717 assert(backtrace.not_null(), "backtrace should have been preallocated");
1718
1719 ResourceMark rm(THREAD);
1720 vframeStream st(THREAD);
1721
1722 BacktraceBuilder bt(backtrace);
1723
1724 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
1725 // methods as preallocated errors aren't created by "java" code.
1726
1727 // fill in as much stack trace as possible
1728 typeArrayOop methods = BacktraceBuilder::get_methods(backtrace);
1729 int max_chunks = MIN2(methods->length(), (int)MaxJavaStackTraceDepth);
1730 int chunk_count = 0;
1731
1732 for (;!st.at_end(); st.next()) {
1733 bt.push(st.method(), st.bci(), CHECK);
1734 chunk_count++;
1735
1736 // Bail-out for deep stacks
1737 if (chunk_count >= max_chunks) break;
1738 }
1739
1740 // For Java 7+ we support the Throwable immutability protocol defined for Java 7. This support
1741 // was missing in 7u0 so in 7u0 there is a workaround in the Throwable class. That workaround
1742 // can be removed in a JDK using this JVM version
1743 if (JDK_Version::is_gte_jdk17x_version()) {
1744 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
1745 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized");
1746 }
1747 }
1748
1749
1750 int java_lang_Throwable::get_stack_trace_depth(oop throwable, TRAPS) {
1751 if (throwable == NULL) {
1752 THROW_0(vmSymbols::java_lang_NullPointerException());
1753 }
1754 objArrayOop chunk = objArrayOop(backtrace(throwable));
1755 int depth = 0;
1756 if (chunk != NULL) {
1757 // Iterate over chunks and count full ones
1758 while (true) {
1759 objArrayOop next = objArrayOop(chunk->obj_at(trace_next_offset));
1760 if (next == NULL) break;
1761 depth += trace_chunk_size;
1762 chunk = next;
1763 }
1764 assert(chunk != NULL && chunk->obj_at(trace_next_offset) == NULL, "sanity check");
1765 // Count element in remaining partial chunk. NULL value for mirror
1766 // marks the end of the stack trace elements that are saved.
1767 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk);
1768 assert(mirrors != NULL, "sanity check");
1769 for (int i = 0; i < mirrors->length(); i++) {
1770 if (mirrors->obj_at(i) == NULL) break;
1771 depth++;
1772 }
1773 }
1774 return depth;
1775 }
1776
1777
1778 oop java_lang_Throwable::get_stack_trace_element(oop throwable, int index, TRAPS) {
1779 if (throwable == NULL) {
1780 THROW_0(vmSymbols::java_lang_NullPointerException());
1781 }
1782 if (index < 0) {
1783 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1784 }
1785 // Compute how many chunks to skip and index into actual chunk
1786 objArrayOop chunk = objArrayOop(backtrace(throwable));
1787 int skip_chunks = index / trace_chunk_size;
1788 int chunk_index = index % trace_chunk_size;
1789 while (chunk != NULL && skip_chunks > 0) {
1790 chunk = objArrayOop(chunk->obj_at(trace_next_offset));
1791 skip_chunks--;
1792 }
1793 if (chunk == NULL) {
1794 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1795 }
1796 // Get method id, bci, version and mirror from chunk
1797 typeArrayOop methods = BacktraceBuilder::get_methods(chunk);
1798 typeArrayOop bcis = BacktraceBuilder::get_bcis(chunk);
1799 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk);
1800
1801 assert(methods != NULL && bcis != NULL && mirrors != NULL, "sanity check");
1802
1803 int method = methods->short_at(chunk_index);
1804 int version = version_at(bcis->int_at(chunk_index));
1805 int bci = bci_at(bcis->int_at(chunk_index));
1806 Handle mirror(THREAD, mirrors->obj_at(chunk_index));
1807
1808 // Chunk can be partial full
1809 if (mirror.is_null()) {
1810 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1811 }
1812
1813 oop element = java_lang_StackTraceElement::create(mirror, method, version, bci, CHECK_0);
1814 return element;
1815 }
1816
1817 oop java_lang_StackTraceElement::create(Handle mirror, int method_id,
1818 int version, int bci, TRAPS) {
1819 // Allocate java.lang.StackTraceElement instance
1820 Klass* k = SystemDictionary::StackTraceElement_klass();
1821 assert(k != NULL, "must be loaded in 1.4+");
1822 instanceKlassHandle ik (THREAD, k);
1823 if (ik->should_be_initialized()) {
1824 ik->initialize(CHECK_0);
1825 }
1826
1827 Handle element = ik->allocate_instance_handle(CHECK_0);
1828 // Fill in class name
1829 ResourceMark rm(THREAD);
1830 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
1831 const char* str = holder->external_name();
1832 oop classname = StringTable::intern((char*) str, CHECK_0);
1833 java_lang_StackTraceElement::set_declaringClass(element(), classname);
1834
1835 Method* method = holder->method_with_idnum(method_id);
1836 // Method on stack may be obsolete because it was redefined so cannot be
1837 // found by idnum.
1838 if (method == NULL) {
1839 // leave name and fileName null
1840 java_lang_StackTraceElement::set_lineNumber(element(), -1);
1841 return element();
1842 }
1843
1844 // Fill in method name
1845 oop methodname = StringTable::intern(method->name(), CHECK_0);
1846 java_lang_StackTraceElement::set_methodName(element(), methodname);
1847
1848 if (!version_matches(method, version)) {
1849 // The method was redefined, accurate line number information isn't available
1850 java_lang_StackTraceElement::set_fileName(element(), NULL);
1851 java_lang_StackTraceElement::set_lineNumber(element(), -1);
1852 } else {
1853 // Fill in source file name and line number.
1854 Symbol* source = holder->source_file_name();
1855 if (ShowHiddenFrames && source == NULL)
1856 source = vmSymbols::unknown_class_name();
1857 oop filename = StringTable::intern(source, CHECK_0);
1858 java_lang_StackTraceElement::set_fileName(element(), filename);
1859
1860 int line_number = get_line_number(method, bci);
1861 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
1862 }
1863 return element();
1864 }
1865
1866 oop java_lang_StackTraceElement::create(methodHandle method, int bci, TRAPS) {
1867 Handle mirror (THREAD, method->method_holder()->java_mirror());
1868 int method_id = method->method_idnum();
1869 return create(mirror, method_id, method->constants()->version(), bci, THREAD);
1870 }
1871
1872 void java_lang_reflect_AccessibleObject::compute_offsets() {
1873 Klass* k = SystemDictionary::reflect_AccessibleObject_klass();
1874 compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature());
1875 }
1876
1877 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
1878 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1879 return (jboolean) reflect->bool_field(override_offset);
1880 }
1881
1882 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
1883 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1884 reflect->bool_field_put(override_offset, (int) value);
1885 }
1886
1887 void java_lang_reflect_Method::compute_offsets() {
1888 Klass* k = SystemDictionary::reflect_Method_klass();
1889 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
1890 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1891 compute_offset(returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature());
1892 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
1893 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
1894 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
1895 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
1896 // The generic signature and annotations fields are only present in 1.5
1897 signature_offset = -1;
1898 annotations_offset = -1;
1899 parameter_annotations_offset = -1;
1900 annotation_default_offset = -1;
1901 type_annotations_offset = -1;
1902 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
1903 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
1904 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
1905 compute_optional_offset(annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature());
1906 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
1907 }
1908
1909 Handle java_lang_reflect_Method::create(TRAPS) {
1910 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1911 Klass* klass = SystemDictionary::reflect_Method_klass();
1912 // This class is eagerly initialized during VM initialization, since we keep a refence
1913 // to one of the methods
1914 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
1915 return InstanceKlass::cast(klass)->allocate_instance_handle(CHECK_NH);
1916 }
1917
1918 oop java_lang_reflect_Method::clazz(oop reflect) {
1919 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1920 return reflect->obj_field(clazz_offset);
1921 }
1922
1923 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
1924 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1925 reflect->obj_field_put(clazz_offset, value);
1926 }
1927
1928 int java_lang_reflect_Method::slot(oop reflect) {
1929 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1930 return reflect->int_field(slot_offset);
1931 }
1932
1933 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
1934 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1935 reflect->int_field_put(slot_offset, value);
1936 }
1937
1938 oop java_lang_reflect_Method::name(oop method) {
1939 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1940 return method->obj_field(name_offset);
1941 }
1942
1943 void java_lang_reflect_Method::set_name(oop method, oop value) {
1944 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1945 method->obj_field_put(name_offset, value);
1946 }
1947
1948 oop java_lang_reflect_Method::return_type(oop method) {
1949 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1950 return method->obj_field(returnType_offset);
1951 }
1952
1953 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
1954 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1955 method->obj_field_put(returnType_offset, value);
1956 }
1957
1958 oop java_lang_reflect_Method::parameter_types(oop method) {
1959 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1960 return method->obj_field(parameterTypes_offset);
1961 }
1962
1963 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
1964 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1965 method->obj_field_put(parameterTypes_offset, value);
1966 }
1967
1968 oop java_lang_reflect_Method::exception_types(oop method) {
1969 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1970 return method->obj_field(exceptionTypes_offset);
1971 }
1972
1973 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
1974 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1975 method->obj_field_put(exceptionTypes_offset, value);
1976 }
1977
1978 int java_lang_reflect_Method::modifiers(oop method) {
1979 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1980 return method->int_field(modifiers_offset);
1981 }
1982
1983 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
1984 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1985 method->int_field_put(modifiers_offset, value);
1986 }
1987
1988 bool java_lang_reflect_Method::has_signature_field() {
1989 return (signature_offset >= 0);
1990 }
1991
1992 oop java_lang_reflect_Method::signature(oop method) {
1993 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1994 assert(has_signature_field(), "signature field must be present");
1995 return method->obj_field(signature_offset);
1996 }
1997
1998 void java_lang_reflect_Method::set_signature(oop method, oop value) {
1999 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2000 assert(has_signature_field(), "signature field must be present");
2001 method->obj_field_put(signature_offset, value);
2002 }
2003
2004 bool java_lang_reflect_Method::has_annotations_field() {
2005 return (annotations_offset >= 0);
2006 }
2007
2008 oop java_lang_reflect_Method::annotations(oop method) {
2009 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2010 assert(has_annotations_field(), "annotations field must be present");
2011 return method->obj_field(annotations_offset);
2012 }
2013
2014 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
2015 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2016 assert(has_annotations_field(), "annotations field must be present");
2017 method->obj_field_put(annotations_offset, value);
2018 }
2019
2020 bool java_lang_reflect_Method::has_parameter_annotations_field() {
2021 return (parameter_annotations_offset >= 0);
2022 }
2023
2024 oop java_lang_reflect_Method::parameter_annotations(oop method) {
2025 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2026 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2027 return method->obj_field(parameter_annotations_offset);
2028 }
2029
2030 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
2031 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2032 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2033 method->obj_field_put(parameter_annotations_offset, value);
2034 }
2035
2036 bool java_lang_reflect_Method::has_annotation_default_field() {
2037 return (annotation_default_offset >= 0);
2038 }
2039
2040 oop java_lang_reflect_Method::annotation_default(oop method) {
2041 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2042 assert(has_annotation_default_field(), "annotation default field must be present");
2043 return method->obj_field(annotation_default_offset);
2044 }
2045
2046 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
2047 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2048 assert(has_annotation_default_field(), "annotation default field must be present");
2049 method->obj_field_put(annotation_default_offset, value);
2050 }
2051
2052 bool java_lang_reflect_Method::has_type_annotations_field() {
2053 return (type_annotations_offset >= 0);
2054 }
2055
2056 oop java_lang_reflect_Method::type_annotations(oop method) {
2057 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2058 assert(has_type_annotations_field(), "type_annotations field must be present");
2059 return method->obj_field(type_annotations_offset);
2060 }
2061
2062 void java_lang_reflect_Method::set_type_annotations(oop method, oop value) {
2063 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2064 assert(has_type_annotations_field(), "type_annotations field must be present");
2065 method->obj_field_put(type_annotations_offset, value);
2066 }
2067
2068 void java_lang_reflect_Constructor::compute_offsets() {
2069 Klass* k = SystemDictionary::reflect_Constructor_klass();
2070 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
2071 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
2072 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
2073 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
2074 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2075 // The generic signature and annotations fields are only present in 1.5
2076 signature_offset = -1;
2077 annotations_offset = -1;
2078 parameter_annotations_offset = -1;
2079 type_annotations_offset = -1;
2080 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
2081 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
2082 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
2083 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
2084 }
2085
2086 Handle java_lang_reflect_Constructor::create(TRAPS) {
2087 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2088 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
2089 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2090 instanceKlassHandle klass (THREAD, k);
2091 // Ensure it is initialized
2092 klass->initialize(CHECK_NH);
2093 return klass->allocate_instance_handle(CHECK_NH);
2094 }
2095
2096 oop java_lang_reflect_Constructor::clazz(oop reflect) {
2097 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2098 return reflect->obj_field(clazz_offset);
2099 }
2100
2101 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
2102 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2103 reflect->obj_field_put(clazz_offset, value);
2104 }
2105
2106 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
2107 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2108 return constructor->obj_field(parameterTypes_offset);
2109 }
2110
2111 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
2112 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2113 constructor->obj_field_put(parameterTypes_offset, value);
2114 }
2115
2116 oop java_lang_reflect_Constructor::exception_types(oop constructor) {
2117 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2118 return constructor->obj_field(exceptionTypes_offset);
2119 }
2120
2121 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
2122 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2123 constructor->obj_field_put(exceptionTypes_offset, value);
2124 }
2125
2126 int java_lang_reflect_Constructor::slot(oop reflect) {
2127 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2128 return reflect->int_field(slot_offset);
2129 }
2130
2131 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
2132 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2133 reflect->int_field_put(slot_offset, value);
2134 }
2135
2136 int java_lang_reflect_Constructor::modifiers(oop constructor) {
2137 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2138 return constructor->int_field(modifiers_offset);
2139 }
2140
2141 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
2142 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2143 constructor->int_field_put(modifiers_offset, value);
2144 }
2145
2146 bool java_lang_reflect_Constructor::has_signature_field() {
2147 return (signature_offset >= 0);
2148 }
2149
2150 oop java_lang_reflect_Constructor::signature(oop constructor) {
2151 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2152 assert(has_signature_field(), "signature field must be present");
2153 return constructor->obj_field(signature_offset);
2154 }
2155
2156 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
2157 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2158 assert(has_signature_field(), "signature field must be present");
2159 constructor->obj_field_put(signature_offset, value);
2160 }
2161
2162 bool java_lang_reflect_Constructor::has_annotations_field() {
2163 return (annotations_offset >= 0);
2164 }
2165
2166 oop java_lang_reflect_Constructor::annotations(oop constructor) {
2167 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2168 assert(has_annotations_field(), "annotations field must be present");
2169 return constructor->obj_field(annotations_offset);
2170 }
2171
2172 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
2173 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2174 assert(has_annotations_field(), "annotations field must be present");
2175 constructor->obj_field_put(annotations_offset, value);
2176 }
2177
2178 bool java_lang_reflect_Constructor::has_parameter_annotations_field() {
2179 return (parameter_annotations_offset >= 0);
2180 }
2181
2182 oop java_lang_reflect_Constructor::parameter_annotations(oop method) {
2183 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2184 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2185 return method->obj_field(parameter_annotations_offset);
2186 }
2187
2188 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
2189 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2190 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2191 method->obj_field_put(parameter_annotations_offset, value);
2192 }
2193
2194 bool java_lang_reflect_Constructor::has_type_annotations_field() {
2195 return (type_annotations_offset >= 0);
2196 }
2197
2198 oop java_lang_reflect_Constructor::type_annotations(oop constructor) {
2199 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2200 assert(has_type_annotations_field(), "type_annotations field must be present");
2201 return constructor->obj_field(type_annotations_offset);
2202 }
2203
2204 void java_lang_reflect_Constructor::set_type_annotations(oop constructor, oop value) {
2205 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2206 assert(has_type_annotations_field(), "type_annotations field must be present");
2207 constructor->obj_field_put(type_annotations_offset, value);
2208 }
2209
2210 void java_lang_reflect_Field::compute_offsets() {
2211 Klass* k = SystemDictionary::reflect_Field_klass();
2212 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
2213 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2214 compute_offset(type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature());
2215 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
2216 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2217 // The generic signature and annotations fields are only present in 1.5
2218 signature_offset = -1;
2219 annotations_offset = -1;
2220 type_annotations_offset = -1;
2221 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
2222 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
2223 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
2224 }
2225
2226 Handle java_lang_reflect_Field::create(TRAPS) {
2227 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2228 Symbol* name = vmSymbols::java_lang_reflect_Field();
2229 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2230 instanceKlassHandle klass (THREAD, k);
2231 // Ensure it is initialized
2232 klass->initialize(CHECK_NH);
2233 return klass->allocate_instance_handle(CHECK_NH);
2234 }
2235
2236 oop java_lang_reflect_Field::clazz(oop reflect) {
2237 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2238 return reflect->obj_field(clazz_offset);
2239 }
2240
2241 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
2242 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2243 reflect->obj_field_put(clazz_offset, value);
2244 }
2245
2246 oop java_lang_reflect_Field::name(oop field) {
2247 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2248 return field->obj_field(name_offset);
2249 }
2250
2251 void java_lang_reflect_Field::set_name(oop field, oop value) {
2252 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2253 field->obj_field_put(name_offset, value);
2254 }
2255
2256 oop java_lang_reflect_Field::type(oop field) {
2257 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2258 return field->obj_field(type_offset);
2259 }
2260
2261 void java_lang_reflect_Field::set_type(oop field, oop value) {
2262 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2263 field->obj_field_put(type_offset, value);
2264 }
2265
2266 int java_lang_reflect_Field::slot(oop reflect) {
2267 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2268 return reflect->int_field(slot_offset);
2269 }
2270
2271 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
2272 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2273 reflect->int_field_put(slot_offset, value);
2274 }
2275
2276 int java_lang_reflect_Field::modifiers(oop field) {
2277 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2278 return field->int_field(modifiers_offset);
2279 }
2280
2281 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
2282 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2283 field->int_field_put(modifiers_offset, value);
2284 }
2285
2286 bool java_lang_reflect_Field::has_signature_field() {
2287 return (signature_offset >= 0);
2288 }
2289
2290 oop java_lang_reflect_Field::signature(oop field) {
2291 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2292 assert(has_signature_field(), "signature field must be present");
2293 return field->obj_field(signature_offset);
2294 }
2295
2296 void java_lang_reflect_Field::set_signature(oop field, oop value) {
2297 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2298 assert(has_signature_field(), "signature field must be present");
2299 field->obj_field_put(signature_offset, value);
2300 }
2301
2302 bool java_lang_reflect_Field::has_annotations_field() {
2303 return (annotations_offset >= 0);
2304 }
2305
2306 oop java_lang_reflect_Field::annotations(oop field) {
2307 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2308 assert(has_annotations_field(), "annotations field must be present");
2309 return field->obj_field(annotations_offset);
2310 }
2311
2312 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
2313 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2314 assert(has_annotations_field(), "annotations field must be present");
2315 field->obj_field_put(annotations_offset, value);
2316 }
2317
2318 bool java_lang_reflect_Field::has_type_annotations_field() {
2319 return (type_annotations_offset >= 0);
2320 }
2321
2322 oop java_lang_reflect_Field::type_annotations(oop field) {
2323 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2324 assert(has_type_annotations_field(), "type_annotations field must be present");
2325 return field->obj_field(type_annotations_offset);
2326 }
2327
2328 void java_lang_reflect_Field::set_type_annotations(oop field, oop value) {
2329 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2330 assert(has_type_annotations_field(), "type_annotations field must be present");
2331 field->obj_field_put(type_annotations_offset, value);
2332 }
2333
2334 void sun_reflect_ConstantPool::compute_offsets() {
2335 Klass* k = SystemDictionary::reflect_ConstantPool_klass();
2336 // This null test can be removed post beta
2337 if (k != NULL) {
2338 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
2339 compute_offset(_oop_offset, k, vmSymbols::ConstantPool_name(), vmSymbols::object_signature());
2340 }
2341 }
2342
2343 void java_lang_reflect_Parameter::compute_offsets() {
2344 Klass* k = SystemDictionary::reflect_Parameter_klass();
2345 if(NULL != k) {
2346 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2347 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2348 compute_offset(index_offset, k, vmSymbols::index_name(), vmSymbols::int_signature());
2349 compute_offset(executable_offset, k, vmSymbols::executable_name(), vmSymbols::executable_signature());
2350 }
2351 }
2352
2353 Handle java_lang_reflect_Parameter::create(TRAPS) {
2354 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2355 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
2356 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2357 instanceKlassHandle klass (THREAD, k);
2358 // Ensure it is initialized
2359 klass->initialize(CHECK_NH);
2360 return klass->allocate_instance_handle(CHECK_NH);
2361 }
2362
2363 oop java_lang_reflect_Parameter::name(oop param) {
2364 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2365 return param->obj_field(name_offset);
2366 }
2367
2368 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
2369 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2370 param->obj_field_put(name_offset, value);
2371 }
2372
2373 int java_lang_reflect_Parameter::modifiers(oop param) {
2374 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2375 return param->int_field(modifiers_offset);
2376 }
2377
2378 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
2379 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2380 param->int_field_put(modifiers_offset, value);
2381 }
2382
2383 int java_lang_reflect_Parameter::index(oop param) {
2384 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2385 return param->int_field(index_offset);
2386 }
2387
2388 void java_lang_reflect_Parameter::set_index(oop param, int value) {
2389 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2390 param->int_field_put(index_offset, value);
2391 }
2392
2393 oop java_lang_reflect_Parameter::executable(oop param) {
2394 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2395 return param->obj_field(executable_offset);
2396 }
2397
2398 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
2399 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2400 param->obj_field_put(executable_offset, value);
2401 }
2402
2403
2404 Handle sun_reflect_ConstantPool::create(TRAPS) {
2405 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2406 Klass* k = SystemDictionary::reflect_ConstantPool_klass();
2407 instanceKlassHandle klass (THREAD, k);
2408 // Ensure it is initialized
2409 klass->initialize(CHECK_NH);
2410 return klass->allocate_instance_handle(CHECK_NH);
2411 }
2412
2413
2414 void sun_reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
2415 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2416 oop mirror = value->pool_holder()->java_mirror();
2417 // Save the mirror to get back the constant pool.
2418 reflect->obj_field_put(_oop_offset, mirror);
2419 }
2420
2421 ConstantPool* sun_reflect_ConstantPool::get_cp(oop reflect) {
2422 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2423
2424 oop mirror = reflect->obj_field(_oop_offset);
2425 Klass* k = java_lang_Class::as_Klass(mirror);
2426 assert(k->oop_is_instance(), "Must be");
2427
2428 // Get the constant pool back from the klass. Since class redefinition
2429 // merges the new constant pool into the old, this is essentially the
2430 // same constant pool as the original. If constant pool merging is
2431 // no longer done in the future, this will have to change to save
2432 // the original.
2433 return InstanceKlass::cast(k)->constants();
2434 }
2435
2436 void sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
2437 Klass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass();
2438 // This null test can be removed post beta
2439 if (k != NULL) {
2440 compute_offset(_base_offset, k,
2441 vmSymbols::base_name(), vmSymbols::object_signature());
2442 }
2443 }
2444
2445 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
2446 Klass* k = SystemDictionary::box_klass(type);
2447 if (k == NULL) return NULL;
2448 instanceKlassHandle h (THREAD, k);
2449 if (!h->is_initialized()) h->initialize(CHECK_0);
2450 return h->allocate_instance(THREAD);
2451 }
2452
2453
2454 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
2455 oop box = initialize_and_allocate(type, CHECK_0);
2456 if (box == NULL) return NULL;
2457 switch (type) {
2458 case T_BOOLEAN:
2459 box->bool_field_put(value_offset, value->z);
2460 break;
2461 case T_CHAR:
2462 box->char_field_put(value_offset, value->c);
2463 break;
2464 case T_FLOAT:
2465 box->float_field_put(value_offset, value->f);
2466 break;
2467 case T_DOUBLE:
2468 box->double_field_put(long_value_offset, value->d);
2469 break;
2470 case T_BYTE:
2471 box->byte_field_put(value_offset, value->b);
2472 break;
2473 case T_SHORT:
2474 box->short_field_put(value_offset, value->s);
2475 break;
2476 case T_INT:
2477 box->int_field_put(value_offset, value->i);
2478 break;
2479 case T_LONG:
2480 box->long_field_put(long_value_offset, value->j);
2481 break;
2482 default:
2483 return NULL;
2484 }
2485 return box;
2486 }
2487
2488
2489 BasicType java_lang_boxing_object::basic_type(oop box) {
2490 if (box == NULL) return T_ILLEGAL;
2491 BasicType type = SystemDictionary::box_klass_type(box->klass());
2492 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
2493 return T_ILLEGAL;
2494 return type;
2495 }
2496
2497
2498 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
2499 BasicType type = SystemDictionary::box_klass_type(box->klass());
2500 switch (type) {
2501 case T_BOOLEAN:
2502 value->z = box->bool_field(value_offset);
2503 break;
2504 case T_CHAR:
2505 value->c = box->char_field(value_offset);
2506 break;
2507 case T_FLOAT:
2508 value->f = box->float_field(value_offset);
2509 break;
2510 case T_DOUBLE:
2511 value->d = box->double_field(long_value_offset);
2512 break;
2513 case T_BYTE:
2514 value->b = box->byte_field(value_offset);
2515 break;
2516 case T_SHORT:
2517 value->s = box->short_field(value_offset);
2518 break;
2519 case T_INT:
2520 value->i = box->int_field(value_offset);
2521 break;
2522 case T_LONG:
2523 value->j = box->long_field(long_value_offset);
2524 break;
2525 default:
2526 return T_ILLEGAL;
2527 } // end switch
2528 return type;
2529 }
2530
2531
2532 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
2533 BasicType type = SystemDictionary::box_klass_type(box->klass());
2534 switch (type) {
2535 case T_BOOLEAN:
2536 box->bool_field_put(value_offset, value->z);
2537 break;
2538 case T_CHAR:
2539 box->char_field_put(value_offset, value->c);
2540 break;
2541 case T_FLOAT:
2542 box->float_field_put(value_offset, value->f);
2543 break;
2544 case T_DOUBLE:
2545 box->double_field_put(long_value_offset, value->d);
2546 break;
2547 case T_BYTE:
2548 box->byte_field_put(value_offset, value->b);
2549 break;
2550 case T_SHORT:
2551 box->short_field_put(value_offset, value->s);
2552 break;
2553 case T_INT:
2554 box->int_field_put(value_offset, value->i);
2555 break;
2556 case T_LONG:
2557 box->long_field_put(long_value_offset, value->j);
2558 break;
2559 default:
2560 return T_ILLEGAL;
2561 } // end switch
2562 return type;
2563 }
2564
2565
2566 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
2567 switch (type) {
2568 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
2569 case T_CHAR: st->print("%d", value->c); break;
2570 case T_BYTE: st->print("%d", value->b); break;
2571 case T_SHORT: st->print("%d", value->s); break;
2572 case T_INT: st->print("%d", value->i); break;
2573 case T_LONG: st->print(INT64_FORMAT, value->j); break;
2574 case T_FLOAT: st->print("%f", value->f); break;
2575 case T_DOUBLE: st->print("%lf", value->d); break;
2576 default: st->print("type %d?", type); break;
2577 }
2578 }
2579
2580
2581 // Support for java_lang_ref_Reference
2582 HeapWord *java_lang_ref_Reference::pending_list_lock_addr() {
2583 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2584 address addr = ik->static_field_addr(static_lock_offset);
2585 return (HeapWord*) addr;
2586 }
2587
2588 oop java_lang_ref_Reference::pending_list_lock() {
2589 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2590 address addr = ik->static_field_addr(static_lock_offset);
2591 if (UseCompressedOops) {
2592 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
2593 } else {
2594 return oopDesc::load_decode_heap_oop((oop*)addr);
2595 }
2596 }
2597
2598 HeapWord *java_lang_ref_Reference::pending_list_addr() {
2599 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2600 address addr = ik->static_field_addr(static_pending_offset);
2601 // XXX This might not be HeapWord aligned, almost rather be char *.
2602 return (HeapWord*)addr;
2603 }
2604
2605 oop java_lang_ref_Reference::pending_list() {
2606 char *addr = (char *)pending_list_addr();
2607 if (UseCompressedOops) {
2608 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
2609 } else {
2610 return oopDesc::load_decode_heap_oop((oop*)addr);
2611 }
2612 }
2613
2614
2615 // Support for java_lang_ref_SoftReference
2616
2617 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
2618 return ref->long_field(timestamp_offset);
2619 }
2620
2621 jlong java_lang_ref_SoftReference::clock() {
2622 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass());
2623 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
2624 return *offset;
2625 }
2626
2627 void java_lang_ref_SoftReference::set_clock(jlong value) {
2628 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass());
2629 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
2630 *offset = value;
2631 }
2632
2633 // Support for java_lang_invoke_DirectMethodHandle
2634
2635 int java_lang_invoke_DirectMethodHandle::_member_offset;
2636
2637 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
2638 oop member_name = NULL;
2639 bool is_dmh = dmh->is_oop() && java_lang_invoke_DirectMethodHandle::is_instance(dmh);
2640 assert(is_dmh, "a DirectMethodHandle oop is expected");
2641 if (is_dmh) {
2642 member_name = dmh->obj_field(member_offset_in_bytes());
2643 }
2644 return member_name;
2645 }
2646
2647 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
2648 Klass* klass_oop = SystemDictionary::DirectMethodHandle_klass();
2649 if (klass_oop != NULL && EnableInvokeDynamic) {
2650 compute_offset(_member_offset, klass_oop, vmSymbols::member_name(), vmSymbols::java_lang_invoke_MemberName_signature());
2651 }
2652 }
2653
2654 // Support for java_lang_invoke_MethodHandle
2655
2656 int java_lang_invoke_MethodHandle::_type_offset;
2657 int java_lang_invoke_MethodHandle::_form_offset;
2658
2659 int java_lang_invoke_MemberName::_clazz_offset;
2660 int java_lang_invoke_MemberName::_name_offset;
2661 int java_lang_invoke_MemberName::_type_offset;
2662 int java_lang_invoke_MemberName::_flags_offset;
2663 int java_lang_invoke_MemberName::_vmtarget_offset;
2664 int java_lang_invoke_MemberName::_vmloader_offset;
2665 int java_lang_invoke_MemberName::_vmindex_offset;
2666
2667 int java_lang_invoke_LambdaForm::_vmentry_offset;
2668
2669 void java_lang_invoke_MethodHandle::compute_offsets() {
2670 Klass* klass_oop = SystemDictionary::MethodHandle_klass();
2671 if (klass_oop != NULL && EnableInvokeDynamic) {
2672 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::java_lang_invoke_MethodType_signature());
2673 compute_optional_offset(_form_offset, klass_oop, vmSymbols::form_name(), vmSymbols::java_lang_invoke_LambdaForm_signature());
2674 if (_form_offset == 0) {
2675 EnableInvokeDynamic = false;
2676 }
2677 }
2678 }
2679
2680 void java_lang_invoke_MemberName::compute_offsets() {
2681 Klass* klass_oop = SystemDictionary::MemberName_klass();
2682 if (klass_oop != NULL && EnableInvokeDynamic) {
2683 compute_offset(_clazz_offset, klass_oop, vmSymbols::clazz_name(), vmSymbols::class_signature());
2684 compute_offset(_name_offset, klass_oop, vmSymbols::name_name(), vmSymbols::string_signature());
2685 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::object_signature());
2686 compute_offset(_flags_offset, klass_oop, vmSymbols::flags_name(), vmSymbols::int_signature());
2687 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2688 }
2689 }
2690
2691 void java_lang_invoke_LambdaForm::compute_offsets() {
2692 Klass* klass_oop = SystemDictionary::LambdaForm_klass();
2693 if (klass_oop != NULL && EnableInvokeDynamic) {
2694 compute_offset(_vmentry_offset, klass_oop, vmSymbols::vmentry_name(), vmSymbols::java_lang_invoke_MemberName_signature());
2695 }
2696 }
2697
2698 oop java_lang_invoke_MethodHandle::type(oop mh) {
2699 return mh->obj_field(_type_offset);
2700 }
2701
2702 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
2703 mh->obj_field_put(_type_offset, mtype);
2704 }
2705
2706 oop java_lang_invoke_MethodHandle::form(oop mh) {
2707 assert(_form_offset != 0, "");
2708 return mh->obj_field(_form_offset);
2709 }
2710
2711 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
2712 assert(_form_offset != 0, "");
2713 mh->obj_field_put(_form_offset, lform);
2714 }
2715
2716 /// MemberName accessors
2717
2718 oop java_lang_invoke_MemberName::clazz(oop mname) {
2719 assert(is_instance(mname), "wrong type");
2720 return mname->obj_field(_clazz_offset);
2721 }
2722
2723 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
2724 assert(is_instance(mname), "wrong type");
2725 mname->obj_field_put(_clazz_offset, clazz);
2726 }
2727
2728 oop java_lang_invoke_MemberName::name(oop mname) {
2729 assert(is_instance(mname), "wrong type");
2730 return mname->obj_field(_name_offset);
2731 }
2732
2733 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
2734 assert(is_instance(mname), "wrong type");
2735 mname->obj_field_put(_name_offset, name);
2736 }
2737
2738 oop java_lang_invoke_MemberName::type(oop mname) {
2739 assert(is_instance(mname), "wrong type");
2740 return mname->obj_field(_type_offset);
2741 }
2742
2743 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
2744 assert(is_instance(mname), "wrong type");
2745 mname->obj_field_put(_type_offset, type);
2746 }
2747
2748 int java_lang_invoke_MemberName::flags(oop mname) {
2749 assert(is_instance(mname), "wrong type");
2750 return mname->int_field(_flags_offset);
2751 }
2752
2753 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
2754 assert(is_instance(mname), "wrong type");
2755 mname->int_field_put(_flags_offset, flags);
2756 }
2757
2758 Metadata* java_lang_invoke_MemberName::vmtarget(oop mname) {
2759 assert(is_instance(mname), "wrong type");
2760 return (Metadata*)mname->address_field(_vmtarget_offset);
2761 }
2762
2763 #if INCLUDE_JVMTI
2764 // Can be executed on VM thread only
2765 void java_lang_invoke_MemberName::adjust_vmtarget(oop mname, Metadata* ref) {
2766 assert((is_instance(mname) && (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0), "wrong type");
2767 assert(Thread::current()->is_VM_thread(), "not VM thread");
2768 mname->address_field_put(_vmtarget_offset, (address)ref);
2769 }
2770 #endif // INCLUDE_JVMTI
2771
2772 void java_lang_invoke_MemberName::set_vmtarget(oop mname, Metadata* ref) {
2773 assert(is_instance(mname), "wrong type");
2774 // check the type of the vmtarget
2775 oop dependency = NULL;
2776 if (ref != NULL) {
2777 switch (flags(mname) & (MN_IS_METHOD |
2778 MN_IS_CONSTRUCTOR |
2779 MN_IS_FIELD)) {
2780 case MN_IS_METHOD:
2781 case MN_IS_CONSTRUCTOR:
2782 assert(ref->is_method(), "should be a method");
2783 dependency = ((Method*)ref)->method_holder()->java_mirror();
2784 break;
2785 case MN_IS_FIELD:
2786 assert(ref->is_klass(), "should be a class");
2787 dependency = ((Klass*)ref)->java_mirror();
2788 break;
2789 default:
2790 ShouldNotReachHere();
2791 }
2792 }
2793 mname->address_field_put(_vmtarget_offset, (address)ref);
2794 // Add a reference to the loader (actually mirror because anonymous classes will not have
2795 // distinct loaders) to ensure the metadata is kept alive
2796 // This mirror may be different than the one in clazz field.
2797 mname->obj_field_put(_vmloader_offset, dependency);
2798 }
2799
2800 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
2801 assert(is_instance(mname), "wrong type");
2802 return (intptr_t) mname->address_field(_vmindex_offset);
2803 }
2804
2805 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
2806 assert(is_instance(mname), "wrong type");
2807 mname->address_field_put(_vmindex_offset, (address) index);
2808 }
2809
2810 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
2811 assert(is_instance(lform), "wrong type");
2812 return lform->obj_field(_vmentry_offset);
2813 }
2814
2815
2816 // Support for java_lang_invoke_MethodType
2817
2818 int java_lang_invoke_MethodType::_rtype_offset;
2819 int java_lang_invoke_MethodType::_ptypes_offset;
2820
2821 void java_lang_invoke_MethodType::compute_offsets() {
2822 Klass* k = SystemDictionary::MethodType_klass();
2823 if (k != NULL) {
2824 compute_offset(_rtype_offset, k, vmSymbols::rtype_name(), vmSymbols::class_signature());
2825 compute_offset(_ptypes_offset, k, vmSymbols::ptypes_name(), vmSymbols::class_array_signature());
2826 }
2827 }
2828
2829 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
2830 st->print("(");
2831 objArrayOop pts = ptypes(mt);
2832 for (int i = 0, limit = pts->length(); i < limit; i++) {
2833 java_lang_Class::print_signature(pts->obj_at(i), st);
2834 }
2835 st->print(")");
2836 java_lang_Class::print_signature(rtype(mt), st);
2837 }
2838
2839 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) {
2840 ResourceMark rm;
2841 stringStream buffer(128);
2842 print_signature(mt, &buffer);
2843 const char* sigstr = buffer.base();
2844 int siglen = (int) buffer.size();
2845 Symbol *name;
2846 if (!intern_if_not_found) {
2847 name = SymbolTable::probe(sigstr, siglen);
2848 } else {
2849 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
2850 }
2851 return name;
2852 }
2853
2854 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
2855 if (mt1 == mt2)
2856 return true;
2857 if (rtype(mt1) != rtype(mt2))
2858 return false;
2859 if (ptype_count(mt1) != ptype_count(mt2))
2860 return false;
2861 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
2862 if (ptype(mt1, i) != ptype(mt2, i))
2863 return false;
2864 }
2865 return true;
2866 }
2867
2868 oop java_lang_invoke_MethodType::rtype(oop mt) {
2869 assert(is_instance(mt), "must be a MethodType");
2870 return mt->obj_field(_rtype_offset);
2871 }
2872
2873 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
2874 assert(is_instance(mt), "must be a MethodType");
2875 return (objArrayOop) mt->obj_field(_ptypes_offset);
2876 }
2877
2878 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
2879 return ptypes(mt)->obj_at(idx);
2880 }
2881
2882 int java_lang_invoke_MethodType::ptype_count(oop mt) {
2883 return ptypes(mt)->length();
2884 }
2885
2886 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
2887 objArrayOop pts = ptypes(mt);
2888 int count = pts->length();
2889 int slots = 0;
2890 for (int i = 0; i < count; i++) {
2891 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
2892 slots += type2size[bt];
2893 }
2894 return slots;
2895 }
2896
2897 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
2898 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
2899 return type2size[bt];
2900 }
2901
2902
2903 // Support for java_lang_invoke_CallSite
2904
2905 int java_lang_invoke_CallSite::_target_offset;
2906
2907 void java_lang_invoke_CallSite::compute_offsets() {
2908 if (!EnableInvokeDynamic) return;
2909 Klass* k = SystemDictionary::CallSite_klass();
2910 if (k != NULL) {
2911 compute_offset(_target_offset, k, vmSymbols::target_name(), vmSymbols::java_lang_invoke_MethodHandle_signature());
2912 }
2913 }
2914
2915
2916 // Support for java_security_AccessControlContext
2917
2918 int java_security_AccessControlContext::_context_offset = 0;
2919 int java_security_AccessControlContext::_privilegedContext_offset = 0;
2920 int java_security_AccessControlContext::_isPrivileged_offset = 0;
2921 int java_security_AccessControlContext::_isAuthorized_offset = -1;
2922
2923 void java_security_AccessControlContext::compute_offsets() {
2924 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
2925 fieldDescriptor fd;
2926 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass());
2927
2928 if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) {
2929 fatal("Invalid layout of java.security.AccessControlContext");
2930 }
2931 _context_offset = fd.offset();
2932
2933 if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) {
2934 fatal("Invalid layout of java.security.AccessControlContext");
2935 }
2936 _privilegedContext_offset = fd.offset();
2937
2938 if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) {
2939 fatal("Invalid layout of java.security.AccessControlContext");
2940 }
2941 _isPrivileged_offset = fd.offset();
2942
2943 // The offset may not be present for bootstrapping with older JDK.
2944 if (ik->find_local_field(vmSymbols::isAuthorized_name(), vmSymbols::bool_signature(), &fd)) {
2945 _isAuthorized_offset = fd.offset();
2946 }
2947 }
2948
2949
2950 bool java_security_AccessControlContext::is_authorized(Handle context) {
2951 assert(context.not_null() && context->klass() == SystemDictionary::AccessControlContext_klass(), "Invalid type");
2952 assert(_isAuthorized_offset != -1, "should be set");
2953 return context->bool_field(_isAuthorized_offset) != 0;
2954 }
2955
2956 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
2957 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
2958 // Ensure klass is initialized
2959 InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->initialize(CHECK_0);
2960 // Allocate result
2961 oop result = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->allocate_instance(CHECK_0);
2962 // Fill in values
2963 result->obj_field_put(_context_offset, context());
2964 result->obj_field_put(_privilegedContext_offset, privileged_context());
2965 result->bool_field_put(_isPrivileged_offset, isPrivileged);
2966 // whitelist AccessControlContexts created by the JVM if present
2967 if (_isAuthorized_offset != -1) {
2968 result->bool_field_put(_isAuthorized_offset, true);
2969 }
2970 return result;
2971 }
2972
2973
2974 // Support for java_lang_ClassLoader
2975
2976 bool java_lang_ClassLoader::offsets_computed = false;
2977 int java_lang_ClassLoader::_loader_data_offset = -1;
2978 int java_lang_ClassLoader::parallelCapable_offset = -1;
2979
2980 ClassLoaderData** java_lang_ClassLoader::loader_data_addr(oop loader) {
2981 assert(loader != NULL && loader->is_oop(), "loader must be oop");
2982 return (ClassLoaderData**) loader->address_field_addr(_loader_data_offset);
2983 }
2984
2985 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
2986 return *java_lang_ClassLoader::loader_data_addr(loader);
2987 }
2988
2989 void java_lang_ClassLoader::compute_offsets() {
2990 assert(!offsets_computed, "offsets should be initialized only once");
2991 offsets_computed = true;
2992
2993 // The field indicating parallelCapable (parallelLockMap) is only present starting in 7,
2994 Klass* k1 = SystemDictionary::ClassLoader_klass();
2995 compute_optional_offset(parallelCapable_offset,
2996 k1, vmSymbols::parallelCapable_name(), vmSymbols::concurrenthashmap_signature());
2997
2998 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2999 }
3000
3001 oop java_lang_ClassLoader::parent(oop loader) {
3002 assert(is_instance(loader), "loader must be oop");
3003 return loader->obj_field(parent_offset);
3004 }
3005
3006 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
3007 assert(is_instance(loader), "loader must be oop");
3008 assert(cl == NULL || is_instance(cl), "cl argument must be oop");
3009 oop acl = loader;
3010 debug_only(jint loop_count = 0);
3011 // This loop taken verbatim from ClassLoader.java:
3012 do {
3013 acl = parent(acl);
3014 if (cl == acl) {
3015 return true;
3016 }
3017 assert(++loop_count > 0, "loop_count overflow");
3018 } while (acl != NULL);
3019 return false;
3020 }
3021
3022
3023 // For class loader classes, parallelCapable defined
3024 // based on non-null field
3025 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
3026 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
3027 if (!JDK_Version::is_gte_jdk17x_version()
3028 || parallelCapable_offset == -1) {
3029 // Default for backward compatibility is false
3030 return false;
3031 }
3032 return (class_loader->obj_field(parallelCapable_offset) != NULL);
3033 }
3034
3035 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
3036 // Fix for 4474172; see evaluation for more details
3037 loader = non_reflection_class_loader(loader);
3038
3039 oop cl = SystemDictionary::java_system_loader();
3040 while(cl != NULL) {
3041 if (cl == loader) return true;
3042 cl = parent(cl);
3043 }
3044 return false;
3045 }
3046
3047 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
3048 if (loader != NULL) {
3049 // See whether this is one of the class loaders associated with
3050 // the generated bytecodes for reflection, and if so, "magically"
3051 // delegate to its parent to prevent class loading from occurring
3052 // in places where applications using reflection didn't expect it.
3053 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass();
3054 // This might be null in non-1.4 JDKs
3055 if (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)) {
3056 return parent(loader);
3057 }
3058 }
3059 return loader;
3060 }
3061
3062
3063 // Support for java_lang_System
3064 int java_lang_System::in_offset_in_bytes() {
3065 return (InstanceMirrorKlass::offset_of_static_fields() + static_in_offset);
3066 }
3067
3068
3069 int java_lang_System::out_offset_in_bytes() {
3070 return (InstanceMirrorKlass::offset_of_static_fields() + static_out_offset);
3071 }
3072
3073
3074 int java_lang_System::err_offset_in_bytes() {
3075 return (InstanceMirrorKlass::offset_of_static_fields() + static_err_offset);
3076 }
3077
3078
3079 bool java_lang_System::has_security_manager() {
3080 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::System_klass());
3081 address addr = ik->static_field_addr(static_security_offset);
3082 if (UseCompressedOops) {
3083 return oopDesc::load_decode_heap_oop((narrowOop *)addr) != NULL;
3084 } else {
3085 return oopDesc::load_decode_heap_oop((oop*)addr) != NULL;
3086 }
3087 }
3088
3089 int java_lang_Class::_klass_offset;
3090 int java_lang_Class::_array_klass_offset;
3091 int java_lang_Class::_oop_size_offset;
3092 int java_lang_Class::_static_oop_field_count_offset;
3093 int java_lang_Class::_protection_domain_offset;
3094 int java_lang_Class::_init_lock_offset;
3095 int java_lang_Class::_signers_offset;
3096 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL;
3097 int java_lang_Throwable::backtrace_offset;
3098 int java_lang_Throwable::detailMessage_offset;
3099 int java_lang_Throwable::cause_offset;
3100 int java_lang_Throwable::stackTrace_offset;
3101 int java_lang_Throwable::static_unassigned_stacktrace_offset;
3102 int java_lang_reflect_AccessibleObject::override_offset;
3103 int java_lang_reflect_Method::clazz_offset;
3104 int java_lang_reflect_Method::name_offset;
3105 int java_lang_reflect_Method::returnType_offset;
3106 int java_lang_reflect_Method::parameterTypes_offset;
3107 int java_lang_reflect_Method::exceptionTypes_offset;
3108 int java_lang_reflect_Method::slot_offset;
3109 int java_lang_reflect_Method::modifiers_offset;
3110 int java_lang_reflect_Method::signature_offset;
3111 int java_lang_reflect_Method::annotations_offset;
3112 int java_lang_reflect_Method::parameter_annotations_offset;
3113 int java_lang_reflect_Method::annotation_default_offset;
3114 int java_lang_reflect_Method::type_annotations_offset;
3115 int java_lang_reflect_Constructor::clazz_offset;
3116 int java_lang_reflect_Constructor::parameterTypes_offset;
3117 int java_lang_reflect_Constructor::exceptionTypes_offset;
3118 int java_lang_reflect_Constructor::slot_offset;
3119 int java_lang_reflect_Constructor::modifiers_offset;
3120 int java_lang_reflect_Constructor::signature_offset;
3121 int java_lang_reflect_Constructor::annotations_offset;
3122 int java_lang_reflect_Constructor::parameter_annotations_offset;
3123 int java_lang_reflect_Constructor::type_annotations_offset;
3124 int java_lang_reflect_Field::clazz_offset;
3125 int java_lang_reflect_Field::name_offset;
3126 int java_lang_reflect_Field::type_offset;
3127 int java_lang_reflect_Field::slot_offset;
3128 int java_lang_reflect_Field::modifiers_offset;
3129 int java_lang_reflect_Field::signature_offset;
3130 int java_lang_reflect_Field::annotations_offset;
3131 int java_lang_reflect_Field::type_annotations_offset;
3132 int java_lang_reflect_Parameter::name_offset;
3133 int java_lang_reflect_Parameter::modifiers_offset;
3134 int java_lang_reflect_Parameter::index_offset;
3135 int java_lang_reflect_Parameter::executable_offset;
3136 int java_lang_boxing_object::value_offset;
3137 int java_lang_boxing_object::long_value_offset;
3138 int java_lang_ref_Reference::referent_offset;
3139 int java_lang_ref_Reference::queue_offset;
3140 int java_lang_ref_Reference::next_offset;
3141 int java_lang_ref_Reference::discovered_offset;
3142 int java_lang_ref_Reference::static_lock_offset;
3143 int java_lang_ref_Reference::static_pending_offset;
3144 int java_lang_ref_Reference::number_of_fake_oop_fields;
3145 int java_lang_ref_SoftReference::timestamp_offset;
3146 int java_lang_ref_SoftReference::static_clock_offset;
3147 int java_lang_ClassLoader::parent_offset;
3148 int java_lang_System::static_in_offset;
3149 int java_lang_System::static_out_offset;
3150 int java_lang_System::static_err_offset;
3151 int java_lang_System::static_security_offset;
3152 int java_lang_StackTraceElement::declaringClass_offset;
3153 int java_lang_StackTraceElement::methodName_offset;
3154 int java_lang_StackTraceElement::fileName_offset;
3155 int java_lang_StackTraceElement::lineNumber_offset;
3156 int java_lang_AssertionStatusDirectives::classes_offset;
3157 int java_lang_AssertionStatusDirectives::classEnabled_offset;
3158 int java_lang_AssertionStatusDirectives::packages_offset;
3159 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
3160 int java_lang_AssertionStatusDirectives::deflt_offset;
3161 int java_nio_Buffer::_limit_offset;
3162 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0;
3163 int sun_reflect_ConstantPool::_oop_offset;
3164 int sun_reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
3165
3166
3167 // Support for java_lang_StackTraceElement
3168
3169 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
3170 element->obj_field_put(fileName_offset, value);
3171 }
3172
3173 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
3174 element->obj_field_put(declaringClass_offset, value);
3175 }
3176
3177 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
3178 element->obj_field_put(methodName_offset, value);
3179 }
3180
3181 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
3182 element->int_field_put(lineNumber_offset, value);
3183 }
3184
3185
3186 // Support for java Assertions - java_lang_AssertionStatusDirectives.
3187
3188 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
3189 o->obj_field_put(classes_offset, val);
3190 }
3191
3192 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
3193 o->obj_field_put(classEnabled_offset, val);
3194 }
3195
3196 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
3197 o->obj_field_put(packages_offset, val);
3198 }
3199
3200 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
3201 o->obj_field_put(packageEnabled_offset, val);
3202 }
3203
3204 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
3205 o->bool_field_put(deflt_offset, val);
3206 }
3207
3208
3209 // Support for intrinsification of java.nio.Buffer.checkIndex
3210 int java_nio_Buffer::limit_offset() {
3211 return _limit_offset;
3212 }
3213
3214
3215 void java_nio_Buffer::compute_offsets() {
3216 Klass* k = SystemDictionary::nio_Buffer_klass();
3217 assert(k != NULL, "must be loaded in 1.4+");
3218 compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature());
3219 }
3220
3221 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) {
3222 if (_owner_offset != 0) return;
3223
3224 assert(JDK_Version::is_gte_jdk16x_version(), "Must be JDK 1.6 or later");
3225 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK);
3226 Klass* k = SystemDictionary::abstract_ownable_synchronizer_klass();
3227 compute_offset(_owner_offset, k,
3228 vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature());
3229 }
3230
3231 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
3232 assert(_owner_offset != 0, "Must be initialized");
3233 return obj->obj_field(_owner_offset);
3234 }
3235
3236 // Compute hard-coded offsets
3237 // Invoked before SystemDictionary::initialize, so pre-loaded classes
3238 // are not available to determine the offset_of_static_fields.
3239 void JavaClasses::compute_hard_coded_offsets() {
3240 const int x = heapOopSize;
3241 const int header = instanceOopDesc::base_offset_in_bytes();
3242
3243 // Throwable Class
3244 java_lang_Throwable::backtrace_offset = java_lang_Throwable::hc_backtrace_offset * x + header;
3245 java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header;
3246 java_lang_Throwable::cause_offset = java_lang_Throwable::hc_cause_offset * x + header;
3247 java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header;
3248 java_lang_Throwable::static_unassigned_stacktrace_offset = java_lang_Throwable::hc_static_unassigned_stacktrace_offset * x;
3249
3250 // java_lang_boxing_object
3251 java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header;
3252 java_lang_boxing_object::long_value_offset = align_size_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong);
3253
3254 // java_lang_ref_Reference:
3255 java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header;
3256 java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header;
3257 java_lang_ref_Reference::next_offset = java_lang_ref_Reference::hc_next_offset * x + header;
3258 java_lang_ref_Reference::discovered_offset = java_lang_ref_Reference::hc_discovered_offset * x + header;
3259 java_lang_ref_Reference::static_lock_offset = java_lang_ref_Reference::hc_static_lock_offset * x;
3260 java_lang_ref_Reference::static_pending_offset = java_lang_ref_Reference::hc_static_pending_offset * x;
3261 // Artificial fields for java_lang_ref_Reference
3262 // The first field is for the discovered field added in 1.4
3263 java_lang_ref_Reference::number_of_fake_oop_fields = 1;
3264
3265 // java_lang_ref_SoftReference Class
3266 java_lang_ref_SoftReference::timestamp_offset = align_size_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong);
3267 // Don't multiply static fields because they are always in wordSize units
3268 java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x;
3269
3270 // java_lang_ClassLoader
3271 java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header;
3272
3273 // java_lang_System
3274 java_lang_System::static_in_offset = java_lang_System::hc_static_in_offset * x;
3275 java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x;
3276 java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x;
3277 java_lang_System::static_security_offset = java_lang_System::hc_static_security_offset * x;
3278
3279 // java_lang_StackTraceElement
3280 java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset * x + header;
3281 java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header;
3282 java_lang_StackTraceElement::fileName_offset = java_lang_StackTraceElement::hc_fileName_offset * x + header;
3283 java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header;
3284 java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header;
3285 java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header;
3286 java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header;
3287 java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header;
3288 java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header;
3289
3290 }
3291
3292
3293 // Compute non-hard-coded field offsets of all the classes in this file
3294 void JavaClasses::compute_offsets() {
3295 // java_lang_Class::compute_offsets was called earlier in bootstrap
3296 java_lang_ClassLoader::compute_offsets();
3297 java_lang_Thread::compute_offsets();
3298 java_lang_ThreadGroup::compute_offsets();
3299 if (EnableInvokeDynamic) {
3300 java_lang_invoke_MethodHandle::compute_offsets();
3301 java_lang_invoke_DirectMethodHandle::compute_offsets();
3302 java_lang_invoke_MemberName::compute_offsets();
3303 java_lang_invoke_LambdaForm::compute_offsets();
3304 java_lang_invoke_MethodType::compute_offsets();
3305 java_lang_invoke_CallSite::compute_offsets();
3306 }
3307 java_security_AccessControlContext::compute_offsets();
3308 // Initialize reflection classes. The layouts of these classes
3309 // changed with the new reflection implementation in JDK 1.4, and
3310 // since the Universe doesn't know what JDK version it is until this
3311 // point we defer computation of these offsets until now.
3312 java_lang_reflect_AccessibleObject::compute_offsets();
3313 java_lang_reflect_Method::compute_offsets();
3314 java_lang_reflect_Constructor::compute_offsets();
3315 java_lang_reflect_Field::compute_offsets();
3316 if (JDK_Version::is_gte_jdk14x_version()) {
3317 java_nio_Buffer::compute_offsets();
3318 }
3319 if (JDK_Version::is_gte_jdk15x_version()) {
3320 sun_reflect_ConstantPool::compute_offsets();
3321 sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets();
3322 }
3323 if (JDK_Version::is_gte_jdk18x_version())
3324 java_lang_reflect_Parameter::compute_offsets();
3325
3326 // generated interpreter code wants to know about the offsets we just computed:
3327 AbstractAssembler::update_delayed_values();
3328 }
3329
3330 #ifndef PRODUCT
3331
3332 // These functions exist to assert the validity of hard-coded field offsets to guard
3333 // against changes in the class files
3334
3335 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
3336 EXCEPTION_MARK;
3337 fieldDescriptor fd;
3338 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3339 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3340 instanceKlassHandle h_klass (THREAD, k);
3341 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3342 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3343 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3344 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
3345 return false;
3346 }
3347 if (fd.is_static()) {
3348 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
3349 return false;
3350 }
3351 if (fd.offset() == hardcoded_offset ) {
3352 return true;
3353 } else {
3354 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
3355 klass_name, field_name, hardcoded_offset, fd.offset());
3356 return false;
3357 }
3358 }
3359
3360
3361 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
3362 EXCEPTION_MARK;
3363 fieldDescriptor fd;
3364 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3365 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3366 instanceKlassHandle h_klass (THREAD, k);
3367 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3368 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3369 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3370 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3371 return false;
3372 }
3373 if (!fd.is_static()) {
3374 tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name);
3375 return false;
3376 }
3377 if (fd.offset() == hardcoded_offset + InstanceMirrorKlass::offset_of_static_fields()) {
3378 return true;
3379 } else {
3380 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());
3381 return false;
3382 }
3383 }
3384
3385
3386 bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) {
3387 EXCEPTION_MARK;
3388 fieldDescriptor fd;
3389 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3390 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3391 instanceKlassHandle h_klass (THREAD, k);
3392 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3393 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3394 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3395 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3396 return false;
3397 }
3398 if (!fd.is_static() || !fd.has_initial_value()) {
3399 tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name);
3400 return false;
3401 }
3402 if (!fd.initial_value_tag().is_int()) {
3403 tty->print_cr("Static field %s.%s is not an int", klass_name, field_name);
3404 return false;
3405 }
3406 jint field_value = fd.int_initial_value();
3407 if (field_value == hardcoded_constant) {
3408 return true;
3409 } else {
3410 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);
3411 return false;
3412 }
3413 }
3414
3415
3416 // Check the hard-coded field offsets of all the classes in this file
3417
3418 void JavaClasses::check_offsets() {
3419 bool valid = true;
3420 HandleMark hm;
3421
3422 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3423 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
3424
3425 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3426 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
3427
3428 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3429 valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig)
3430
3431 #define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \
3432 valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig)
3433
3434 // java.lang.String
3435
3436 CHECK_OFFSET("java/lang/String", java_lang_String, value, "[C");
3437 if (java_lang_String::has_offset_field()) {
3438 CHECK_OFFSET("java/lang/String", java_lang_String, offset, "I");
3439 CHECK_OFFSET("java/lang/String", java_lang_String, count, "I");
3440 }
3441 if (java_lang_String::has_hash_field()) {
3442 CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I");
3443 }
3444
3445 // java.lang.Class
3446
3447 // Fake fields
3448 // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked
3449 // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked
3450
3451 // java.lang.Throwable
3452
3453 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;");
3454 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;");
3455 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, cause, "Ljava/lang/Throwable;");
3456 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;");
3457
3458 // Boxed primitive objects (java_lang_boxing_object)
3459
3460 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
3461 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
3462 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
3463 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
3464 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
3465 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
3466 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
3467 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
3468
3469 // java.lang.ClassLoader
3470
3471 CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent, "Ljava/lang/ClassLoader;");
3472
3473 // java.lang.System
3474
3475 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, in, "Ljava/io/InputStream;");
3476 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;");
3477 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;");
3478 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, security, "Ljava/lang/SecurityManager;");
3479
3480 // java.lang.StackTraceElement
3481
3482 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;");
3483 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;");
3484 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, fileName, "Ljava/lang/String;");
3485 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I");
3486
3487 // java.lang.ref.Reference
3488
3489 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
3490 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
3491 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
3492 // Fake field
3493 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
3494 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, lock, "Ljava/lang/ref/Reference$Lock;");
3495 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, pending, "Ljava/lang/ref/Reference;");
3496
3497 // java.lang.ref.SoftReference
3498
3499 CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J");
3500 CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J");
3501
3502 // java.lang.AssertionStatusDirectives
3503 //
3504 // The CheckAssertionStatusDirectives boolean can be removed from here and
3505 // globals.hpp after the AssertionStatusDirectives class has been integrated
3506 // into merlin "for some time." Without it, the vm will fail with early
3507 // merlin builds.
3508
3509 if (CheckAssertionStatusDirectives && JDK_Version::is_gte_jdk14x_version()) {
3510 const char* nm = "java/lang/AssertionStatusDirectives";
3511 const char* sig = "[Ljava/lang/String;";
3512 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig);
3513 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z");
3514 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig);
3515 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z");
3516 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z");
3517 }
3518
3519 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
3520 }
3521
3522 #endif // PRODUCT
3523
3524 int InjectedField::compute_offset() {
3525 Klass* klass_oop = klass();
3526 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
3527 if (!may_be_java && !fs.access_flags().is_internal()) {
3528 // Only look at injected fields
3529 continue;
3530 }
3531 if (fs.name() == name() && fs.signature() == signature()) {
3532 return fs.offset();
3533 }
3534 }
3535 ResourceMark rm;
3536 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)" : "");
3537 #ifndef PRODUCT
3538 klass_oop->print();
3539 tty->print_cr("all fields:");
3540 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
3541 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
3542 }
3543 #endif //PRODUCT
3544 fatal("Invalid layout of preloaded class");
3545 return -1;
3546 }
3547
3548 void javaClasses_init() {
3549 JavaClasses::compute_offsets();
3550 JavaClasses::check_offsets();
3551 FilteredFieldsMap::initialize(); // must be done after computing offsets.
3552 }