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/stringTable.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/oop.inline.hpp"
43 #include "oops/symbol.hpp"
44 #include "oops/typeArrayOop.hpp"
45 #include "runtime/fieldDescriptor.hpp"
46 #include "runtime/handles.inline.hpp"
47 #include "runtime/interfaceSupport.hpp"
48 #include "runtime/java.hpp"
49 #include "runtime/javaCalls.hpp"
50 #include "runtime/safepoint.hpp"
51 #include "runtime/thread.inline.hpp"
52 #include "runtime/vframe.hpp"
53 #include "utilities/preserveException.hpp"
54
55 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
56
57 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \
58 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum);
59
60 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \
61 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java },
62
63 InjectedField JavaClasses::_injected_fields[] = {
64 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
65 };
66
67 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
68 return _injected_fields[id].compute_offset();
69 }
70
71
72 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
73 *field_count = 0;
74
75 vmSymbols::SID sid = vmSymbols::find_sid(class_name);
76 if (sid == vmSymbols::NO_SID) {
77 // Only well known classes can inject fields
78 return NULL;
79 }
80
81 int count = 0;
82 int start = -1;
83
84 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
85 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \
86 count++; \
87 if (start == -1) start = klass##_##name##_enum; \
88 }
89 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
90 #undef LOOKUP_INJECTED_FIELD
91
92 if (start != -1) {
93 *field_count = count;
94 return _injected_fields + start;
95 }
96 return NULL;
97 }
98
99
100 static bool find_field(InstanceKlass* ik,
101 Symbol* name_symbol, Symbol* signature_symbol,
102 fieldDescriptor* fd,
103 bool allow_super = false) {
104 if (allow_super)
105 return ik->find_field(name_symbol, signature_symbol, fd) != NULL;
106 else
107 return ik->find_local_field(name_symbol, signature_symbol, fd);
108 }
109
110 // Helpful routine for computing field offsets at run time rather than hardcoding them
111 static void
112 compute_offset(int &dest_offset,
113 Klass* klass_oop, Symbol* name_symbol, Symbol* signature_symbol,
114 bool allow_super = false) {
115 fieldDescriptor fd;
116 InstanceKlass* ik = InstanceKlass::cast(klass_oop);
117 if (!find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) {
118 ResourceMark rm;
119 tty->print_cr("Invalid layout of %s at %s", ik->external_name(), name_symbol->as_C_string());
120 #ifndef PRODUCT
121 klass_oop->print();
122 tty->print_cr("all fields:");
123 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
124 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
125 }
126 #endif //PRODUCT
127 fatal("Invalid layout of preloaded class");
128 }
129 dest_offset = fd.offset();
130 }
131
132 // Same as above but for "optional" offsets that might not be present in certain JDK versions
133 static void
134 compute_optional_offset(int& dest_offset,
135 Klass* klass_oop, Symbol* name_symbol, Symbol* signature_symbol,
136 bool allow_super = false) {
137 fieldDescriptor fd;
138 InstanceKlass* ik = InstanceKlass::cast(klass_oop);
139 if (find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) {
140 dest_offset = fd.offset();
141 }
142 }
143
144
145 int java_lang_String::value_offset = 0;
146 int java_lang_String::offset_offset = 0;
147 int java_lang_String::count_offset = 0;
148 int java_lang_String::hash_offset = 0;
149
150 bool java_lang_String::initialized = false;
151
152 void java_lang_String::compute_offsets() {
153 assert(!initialized, "offsets should be initialized only once");
154
155 Klass* k = SystemDictionary::String_klass();
156 compute_offset(value_offset, k, vmSymbols::value_name(), vmSymbols::char_array_signature());
157 compute_optional_offset(offset_offset, k, vmSymbols::offset_name(), vmSymbols::int_signature());
158 compute_optional_offset(count_offset, k, vmSymbols::count_name(), vmSymbols::int_signature());
159 compute_optional_offset(hash_offset, k, vmSymbols::hash_name(), vmSymbols::int_signature());
160
161 initialized = true;
162 }
163
164 Handle java_lang_String::basic_create(int length, TRAPS) {
165 assert(initialized, "Must be initialized");
166 // Create the String object first, so there's a chance that the String
167 // and the char array it points to end up in the same cache line.
168 oop obj;
169 obj = InstanceKlass::cast(SystemDictionary::String_klass())->allocate_instance(CHECK_NH);
170
171 // Create the char array. The String object must be handlized here
172 // because GC can happen as a result of the allocation attempt.
173 Handle h_obj(THREAD, obj);
174 typeArrayOop buffer;
175 buffer = oopFactory::new_charArray(length, CHECK_NH);
176
177 // Point the String at the char array
178 obj = h_obj();
179 set_value(obj, buffer);
180 // No need to zero the offset, allocation zero'ed the entire String object
181 assert(offset(obj) == 0, "initial String offset should be zero");
182 //set_offset(obj, 0);
183 set_count(obj, length);
184
185 return h_obj;
186 }
187
188 Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) {
189 Handle h_obj = basic_create(length, CHECK_NH);
190 typeArrayOop buffer = value(h_obj());
191 for (int index = 0; index < length; index++) {
192 buffer->char_at_put(index, unicode[index]);
193 }
194 return h_obj;
195 }
196
197 oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) {
198 Handle h_obj = create_from_unicode(unicode, length, CHECK_0);
199 return h_obj();
200 }
201
202 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
203 if (utf8_str == NULL) {
204 return Handle();
205 }
206 int length = UTF8::unicode_length(utf8_str);
207 Handle h_obj = basic_create(length, CHECK_NH);
208 if (length > 0) {
209 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
210 }
211 return h_obj;
212 }
213
214 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
215 Handle h_obj = create_from_str(utf8_str, CHECK_0);
216 return h_obj();
217 }
218
219 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) {
220 int length = UTF8::unicode_length((char*)symbol->bytes(), symbol->utf8_length());
221 Handle h_obj = basic_create(length, CHECK_NH);
222 if (length > 0) {
223 UTF8::convert_to_unicode((char*)symbol->bytes(), value(h_obj())->char_at_addr(0), length);
224 }
225 return h_obj;
226 }
227
228 // Converts a C string to a Java String based on current encoding
229 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
230 assert(str != NULL, "bad arguments");
231
232 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *);
233 static to_java_string_fn_t _to_java_string_fn = NULL;
234
235 if (_to_java_string_fn == NULL) {
236 void *lib_handle = os::native_java_library();
237 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform"));
238 if (_to_java_string_fn == NULL) {
239 fatal("NewStringPlatform missing");
240 }
241 }
242
243 jstring js = NULL;
244 { JavaThread* thread = (JavaThread*)THREAD;
245 assert(thread->is_Java_thread(), "must be java thread");
246 HandleMark hm(thread);
247 ThreadToNativeFromVM ttn(thread);
248 js = (_to_java_string_fn)(thread->jni_environment(), str);
249 }
250 return Handle(THREAD, JNIHandles::resolve(js));
251 }
252
253 // Converts a Java String to a native C string that can be used for
254 // native OS calls.
255 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
256
257 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
258 static to_platform_string_fn_t _to_platform_string_fn = NULL;
259
260 if (_to_platform_string_fn == NULL) {
261 void *lib_handle = os::native_java_library();
262 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
263 if (_to_platform_string_fn == NULL) {
264 fatal("GetStringPlatformChars missing");
265 }
266 }
267
268 char *native_platform_string;
269 { JavaThread* thread = (JavaThread*)THREAD;
270 assert(thread->is_Java_thread(), "must be java thread");
271 JNIEnv *env = thread->jni_environment();
272 jstring js = (jstring) JNIHandles::make_local(env, java_string());
273 bool is_copy;
274 HandleMark hm(thread);
275 ThreadToNativeFromVM ttn(thread);
276 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
277 assert(is_copy == JNI_TRUE, "is_copy value changed");
278 JNIHandles::destroy_local(js);
279 }
280 return native_platform_string;
281 }
282
283 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) {
284 oop obj = java_string();
285 // Typical usage is to convert all '/' to '.' in string.
286 typeArrayOop value = java_lang_String::value(obj);
287 int offset = java_lang_String::offset(obj);
288 int length = java_lang_String::length(obj);
289
290 // First check if any from_char exist
291 int index; // Declared outside, used later
292 for (index = 0; index < length; index++) {
293 if (value->char_at(index + offset) == from_char) {
294 break;
295 }
296 }
297 if (index == length) {
298 // No from_char, so do not copy.
299 return java_string;
300 }
301
302 // Create new UNICODE buffer. Must handlize value because GC
303 // may happen during String and char array creation.
304 typeArrayHandle h_value(THREAD, value);
305 Handle string = basic_create(length, CHECK_NH);
306
307 typeArrayOop from_buffer = h_value();
308 typeArrayOop to_buffer = java_lang_String::value(string());
309
310 // Copy contents
311 for (index = 0; index < length; index++) {
312 jchar c = from_buffer->char_at(index + offset);
313 if (c == from_char) {
314 c = to_char;
315 }
316 to_buffer->char_at_put(index, c);
317 }
318 return string;
319 }
320
321 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
322 typeArrayOop value = java_lang_String::value(java_string);
323 int offset = java_lang_String::offset(java_string);
324 length = java_lang_String::length(java_string);
325
326 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
327 if (result != NULL) {
328 for (int index = 0; index < length; index++) {
329 result[index] = value->char_at(index + offset);
330 }
331 } else {
332 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
333 }
334 return result;
335 }
336
337 unsigned int java_lang_String::hash_code(oop java_string) {
338 int length = java_lang_String::length(java_string);
339 // Zero length string will hash to zero with String.hashCode() function.
340 if (length == 0) return 0;
341
342 typeArrayOop value = java_lang_String::value(java_string);
343 int offset = java_lang_String::offset(java_string);
344 return java_lang_String::hash_code(value->char_at_addr(offset), length);
345 }
346
347 char* java_lang_String::as_quoted_ascii(oop java_string) {
348 typeArrayOop value = java_lang_String::value(java_string);
349 int offset = java_lang_String::offset(java_string);
350 int length = java_lang_String::length(java_string);
351
352 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
353 if (base == NULL) return NULL;
354
355 int result_length = UNICODE::quoted_ascii_length(base, length) + 1;
356 char* result = NEW_RESOURCE_ARRAY(char, result_length);
357 UNICODE::as_quoted_ascii(base, length, result, result_length);
358 assert(result_length >= length + 1, "must not be shorter");
359 assert(result_length == (int)strlen(result) + 1, "must match");
360 return result;
361 }
362
363 unsigned int java_lang_String::hash_string(oop java_string) {
364 int length = java_lang_String::length(java_string);
365 // Zero length string doesn't hash necessarily hash to zero.
366 if (length == 0) {
367 return StringTable::hash_string(NULL, 0);
368 }
369
370 typeArrayOop value = java_lang_String::value(java_string);
371 int offset = java_lang_String::offset(java_string);
372 return StringTable::hash_string(value->char_at_addr(offset), length);
373 }
374
375 Symbol* java_lang_String::as_symbol(Handle java_string, TRAPS) {
376 oop obj = java_string();
377 typeArrayOop value = java_lang_String::value(obj);
378 int offset = java_lang_String::offset(obj);
379 int length = java_lang_String::length(obj);
380 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
381 Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD);
382 return sym;
383 }
384
385 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
386 typeArrayOop value = java_lang_String::value(java_string);
387 int offset = java_lang_String::offset(java_string);
388 int length = java_lang_String::length(java_string);
389 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
390 return SymbolTable::probe_unicode(base, length);
391 }
392
393
394 int java_lang_String::utf8_length(oop java_string) {
395 typeArrayOop value = java_lang_String::value(java_string);
396 int offset = java_lang_String::offset(java_string);
397 int length = java_lang_String::length(java_string);
398 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
399 return UNICODE::utf8_length(position, length);
400 }
401
402 char* java_lang_String::as_utf8_string(oop java_string) {
403 typeArrayOop value = java_lang_String::value(java_string);
404 int offset = java_lang_String::offset(java_string);
405 int length = java_lang_String::length(java_string);
406 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
407 return UNICODE::as_utf8(position, length);
408 }
409
410 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) {
411 typeArrayOop value = java_lang_String::value(java_string);
412 int offset = java_lang_String::offset(java_string);
413 int length = java_lang_String::length(java_string);
414 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
415 return UNICODE::as_utf8(position, length, buf, buflen);
416 }
417
418 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
419 typeArrayOop value = java_lang_String::value(java_string);
420 int offset = java_lang_String::offset(java_string);
421 int length = java_lang_String::length(java_string);
422 assert(start + len <= length, "just checking");
423 jchar* position = value->char_at_addr(offset + start);
424 return UNICODE::as_utf8(position, len);
425 }
426
427 char* java_lang_String::as_utf8_string(oop java_string, int start, int len, char* buf, int buflen) {
428 typeArrayOop value = java_lang_String::value(java_string);
429 int offset = java_lang_String::offset(java_string);
430 int length = java_lang_String::length(java_string);
431 assert(start + len <= length, "just checking");
432 jchar* position = value->char_at_addr(offset + start);
433 return UNICODE::as_utf8(position, len, buf, buflen);
434 }
435
436 bool java_lang_String::equals(oop java_string, jchar* chars, int len) {
437 assert(java_string->klass() == SystemDictionary::String_klass(),
438 "must be java_string");
439 typeArrayOop value = java_lang_String::value(java_string);
440 int offset = java_lang_String::offset(java_string);
441 int length = java_lang_String::length(java_string);
442 if (length != len) {
443 return false;
444 }
445 for (int i = 0; i < len; i++) {
446 if (value->char_at(i + offset) != chars[i]) {
447 return false;
448 }
449 }
450 return true;
451 }
452
453 bool java_lang_String::equals(oop str1, oop str2) {
454 assert(str1->klass() == SystemDictionary::String_klass(),
455 "must be java String");
456 assert(str2->klass() == SystemDictionary::String_klass(),
457 "must be java String");
458 typeArrayOop value1 = java_lang_String::value(str1);
459 int offset1 = java_lang_String::offset(str1);
460 int length1 = java_lang_String::length(str1);
461 typeArrayOop value2 = java_lang_String::value(str2);
462 int offset2 = java_lang_String::offset(str2);
463 int length2 = java_lang_String::length(str2);
464
465 if (length1 != length2) {
466 return false;
467 }
468 for (int i = 0; i < length1; i++) {
469 if (value1->char_at(i + offset1) != value2->char_at(i + offset2)) {
470 return false;
471 }
472 }
473 return true;
474 }
475
476 void java_lang_String::print(oop java_string, outputStream* st) {
477 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string");
478 typeArrayOop value = java_lang_String::value(java_string);
479
480 if (value == NULL) {
481 // This can happen if, e.g., printing a String
482 // object before its initializer has been called
483 st->print("NULL");
484 return;
485 }
486
487 int offset = java_lang_String::offset(java_string);
488 int length = java_lang_String::length(java_string);
489
490 st->print("\"");
491 for (int index = 0; index < length; index++) {
492 st->print("%c", value->char_at(index + offset));
493 }
494 st->print("\"");
495 }
496
497
498 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
499 assert(mirror.not_null() && fd->is_static(), "just checking");
500 if (fd->has_initial_value()) {
501 BasicType t = fd->field_type();
502 switch (t) {
503 case T_BYTE:
504 mirror()->byte_field_put(fd->offset(), fd->int_initial_value());
505 break;
506 case T_BOOLEAN:
507 mirror()->bool_field_put(fd->offset(), fd->int_initial_value());
508 break;
509 case T_CHAR:
510 mirror()->char_field_put(fd->offset(), fd->int_initial_value());
511 break;
512 case T_SHORT:
513 mirror()->short_field_put(fd->offset(), fd->int_initial_value());
514 break;
515 case T_INT:
516 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
517 break;
518 case T_FLOAT:
519 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
520 break;
521 case T_DOUBLE:
522 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
523 break;
524 case T_LONG:
525 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
526 break;
527 case T_OBJECT:
528 {
529 #ifdef ASSERT
530 TempNewSymbol sym = SymbolTable::new_symbol("Ljava/lang/String;", CHECK);
531 assert(fd->signature() == sym, "just checking");
532 #endif
533 oop string = fd->string_initial_value(CHECK);
534 mirror()->obj_field_put(fd->offset(), string);
535 }
536 break;
537 default:
538 THROW_MSG(vmSymbols::java_lang_ClassFormatError(),
539 "Illegal ConstantValue attribute in class file");
540 }
541 }
542 }
543
544
545 void java_lang_Class::fixup_mirror(KlassHandle k, TRAPS) {
546 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
547
548 // If the offset was read from the shared archive, it was fixed up already
549 if (!k->is_shared()) {
550 if (k->oop_is_instance()) {
551 // During bootstrap, java.lang.Class wasn't loaded so static field
552 // offsets were computed without the size added it. Go back and
553 // update all the static field offsets to included the size.
554 for (JavaFieldStream fs(InstanceKlass::cast(k())); !fs.done(); fs.next()) {
555 if (fs.access_flags().is_static()) {
556 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields();
557 fs.set_offset(real_offset);
558 }
559 }
560 }
561 }
562 create_mirror(k, Handle(NULL), Handle(NULL), CHECK);
563 }
564
565 void java_lang_Class::initialize_mirror_fields(KlassHandle k,
566 Handle mirror,
567 Handle protection_domain,
568 TRAPS) {
569 // Allocate a simple java object for a lock.
570 // This needs to be a java object because during class initialization
571 // it can be held across a java call.
572 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
573 set_init_lock(mirror(), r);
574
575 // Set protection domain also
576 set_protection_domain(mirror(), protection_domain());
577
578 // Initialize static fields
579 InstanceKlass::cast(k())->do_local_static_fields(&initialize_static_field, mirror, CHECK);
580 }
581
582 void java_lang_Class::create_mirror(KlassHandle k, Handle class_loader,
583 Handle protection_domain, TRAPS) {
584 assert(k->java_mirror() == NULL, "should only assign mirror once");
585 // Use this moment of initialization to cache modifier_flags also,
586 // to support Class.getModifiers(). Instance classes recalculate
587 // the cached flags after the class file is parsed, but before the
588 // class is put into the system dictionary.
589 int computed_modifiers = k->compute_modifier_flags(CHECK);
590 k->set_modifier_flags(computed_modifiers);
591 // Class_klass has to be loaded because it is used to allocate
592 // the mirror.
593 if (SystemDictionary::Class_klass_loaded()) {
594 // Allocate mirror (java.lang.Class instance)
595 Handle mirror = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK);
596
597 // Setup indirection from mirror->klass
598 if (!k.is_null()) {
599 java_lang_Class::set_klass(mirror(), k());
600 }
601
602 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
603 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
604
605 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
606
607 // It might also have a component mirror. This mirror must already exist.
608 if (k->oop_is_array()) {
609 Handle comp_mirror;
610 if (k->oop_is_typeArray()) {
611 BasicType type = TypeArrayKlass::cast(k())->element_type();
612 comp_mirror = Universe::java_mirror(type);
613 } else {
614 assert(k->oop_is_objArray(), "Must be");
615 Klass* element_klass = ObjArrayKlass::cast(k())->element_klass();
616 assert(element_klass != NULL, "Must have an element klass");
617 comp_mirror = element_klass->java_mirror();
618 }
619 assert(comp_mirror.not_null(), "must have a mirror");
620
621 // Two-way link between the array klass and its component mirror:
622 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
623 set_component_mirror(mirror(), comp_mirror());
624 ArrayKlass::cast(k())->set_component_mirror(comp_mirror());
625 set_array_klass(comp_mirror(), k());
626 } else {
627 assert(k->oop_is_instance(), "Must be");
628
629 initialize_mirror_fields(k, mirror, protection_domain, THREAD);
630 if (HAS_PENDING_EXCEPTION) {
631 // If any of the fields throws an exception like OOM remove the klass field
632 // from the mirror so GC doesn't follow it after the klass has been deallocated.
633 // This mirror looks like a primitive type, which logically it is because it
634 // it represents no class.
635 java_lang_Class::set_klass(mirror(), NULL);
636 return;
637 }
638 }
639
640 // set the classLoader field in the java_lang_Class instance
641 set_class_loader(mirror(), class_loader());
642
643 // Setup indirection from klass->mirror last
644 // after any exceptions can happen during allocations.
645 if (!k.is_null()) {
646 k->set_java_mirror(mirror());
647 }
648 } else {
649 if (fixup_mirror_list() == NULL) {
650 GrowableArray<Klass*>* list =
651 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true);
652 set_fixup_mirror_list(list);
653 }
654 fixup_mirror_list()->push(k());
655 }
656 }
657
658
659 int java_lang_Class::oop_size(oop java_class) {
660 assert(_oop_size_offset != 0, "must be set");
661 return java_class->int_field(_oop_size_offset);
662 }
663 void java_lang_Class::set_oop_size(oop java_class, int size) {
664 assert(_oop_size_offset != 0, "must be set");
665 java_class->int_field_put(_oop_size_offset, size);
666 }
667 int java_lang_Class::static_oop_field_count(oop java_class) {
668 assert(_static_oop_field_count_offset != 0, "must be set");
669 return java_class->int_field(_static_oop_field_count_offset);
670 }
671 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
672 assert(_static_oop_field_count_offset != 0, "must be set");
673 java_class->int_field_put(_static_oop_field_count_offset, size);
674 }
675
676 oop java_lang_Class::protection_domain(oop java_class) {
677 assert(_protection_domain_offset != 0, "must be set");
678 return java_class->obj_field(_protection_domain_offset);
679 }
680 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
681 assert(_protection_domain_offset != 0, "must be set");
682 java_class->obj_field_put(_protection_domain_offset, pd);
683 }
684
685 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
686 if (_component_mirror_offset != 0) {
687 java_class->obj_field_put(_component_mirror_offset, comp_mirror);
688 }
689 }
690 oop java_lang_Class::component_mirror(oop java_class) {
691 assert(_component_mirror_offset != 0, "must be set");
692 return java_class->obj_field(_component_mirror_offset);
693 }
694
695 oop java_lang_Class::init_lock(oop java_class) {
696 assert(_init_lock_offset != 0, "must be set");
697 return java_class->obj_field(_init_lock_offset);
698 }
699 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
700 assert(_init_lock_offset != 0, "must be set");
701 java_class->obj_field_put(_init_lock_offset, init_lock);
702 }
703
704 objArrayOop java_lang_Class::signers(oop java_class) {
705 assert(_signers_offset != 0, "must be set");
706 return (objArrayOop)java_class->obj_field(_signers_offset);
707 }
708 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) {
709 assert(_signers_offset != 0, "must be set");
710 java_class->obj_field_put(_signers_offset, (oop)signers);
711 }
712
713
714 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
715 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet.
716 if (_class_loader_offset != 0) {
717 java_class->obj_field_put(_class_loader_offset, loader);
718 }
719 }
720
721 oop java_lang_Class::class_loader(oop java_class) {
722 assert(_class_loader_offset != 0, "must be set");
723 return java_class->obj_field(_class_loader_offset);
724 }
725
726 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
727 // This should be improved by adding a field at the Java level or by
728 // introducing a new VM klass (see comment in ClassFileParser)
729 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0);
730 if (type != T_VOID) {
731 Klass* aklass = Universe::typeArrayKlassObj(type);
732 assert(aklass != NULL, "correct bootstrap");
733 set_array_klass(java_class, aklass);
734 }
735 #ifdef ASSERT
736 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass());
737 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
738 #endif
739 return java_class;
740 }
741
742
743 Klass* java_lang_Class::as_Klass(oop java_class) {
744 //%note memory_2
745 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
746 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset));
747 assert(k == NULL || k->is_klass(), "type check");
748 return k;
749 }
750
751
752 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
753 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
754 java_class->metadata_field_put(_klass_offset, klass);
755 }
756
757
758 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
759 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
760 Symbol* name = NULL;
761 bool is_instance = false;
762 if (is_primitive(java_class)) {
763 name = vmSymbols::type_signature(primitive_type(java_class));
764 } else {
765 Klass* k = as_Klass(java_class);
766 is_instance = k->oop_is_instance();
767 name = k->name();
768 }
769 if (name == NULL) {
770 st->print("<null>");
771 return;
772 }
773 if (is_instance) st->print("L");
774 st->write((char*) name->base(), (int) name->utf8_length());
775 if (is_instance) st->print(";");
776 }
777
778 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) {
779 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
780 Symbol* name;
781 if (is_primitive(java_class)) {
782 name = vmSymbols::type_signature(primitive_type(java_class));
783 // Because this can create a new symbol, the caller has to decrement
784 // the refcount, so make adjustment here and below for symbols returned
785 // that are not created or incremented due to a successful lookup.
786 name->increment_refcount();
787 } else {
788 Klass* k = as_Klass(java_class);
789 if (!k->oop_is_instance()) {
790 name = k->name();
791 name->increment_refcount();
792 } else {
793 ResourceMark rm;
794 const char* sigstr = k->signature_name();
795 int siglen = (int) strlen(sigstr);
796 if (!intern_if_not_found) {
797 name = SymbolTable::probe(sigstr, siglen);
798 } else {
799 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
800 }
801 }
802 }
803 return name;
804 }
805
806
807 Klass* java_lang_Class::array_klass(oop java_class) {
808 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
809 assert(k == NULL || k->is_klass() && k->oop_is_array(), "should be array klass");
810 return k;
811 }
812
813
814 void java_lang_Class::set_array_klass(oop java_class, Klass* klass) {
815 assert(klass->is_klass() && klass->oop_is_array(), "should be array klass");
816 java_class->metadata_field_put(_array_klass_offset, klass);
817 }
818
819
820 bool java_lang_Class::is_primitive(oop java_class) {
821 // should assert:
822 //assert(java_lang_Class::is_instance(java_class), "must be a Class object");
823 bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL);
824
825 #ifdef ASSERT
826 if (is_primitive) {
827 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
828 assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()),
829 "Should be either the T_VOID primitive or a java primitive");
830 }
831 #endif
832
833 return is_primitive;
834 }
835
836
837 BasicType java_lang_Class::primitive_type(oop java_class) {
838 assert(java_lang_Class::is_primitive(java_class), "just checking");
839 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
840 BasicType type = T_VOID;
841 if (ak != NULL) {
842 // Note: create_basic_type_mirror above initializes ak to a non-null value.
843 type = ArrayKlass::cast(ak)->element_type();
844 } else {
845 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
846 }
847 assert(Universe::java_mirror(type) == java_class, "must be consistent");
848 return type;
849 }
850
851 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
852 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
853 if (is_primitive(java_class)) {
854 if (reference_klass != NULL)
855 (*reference_klass) = NULL;
856 return primitive_type(java_class);
857 } else {
858 if (reference_klass != NULL)
859 (*reference_klass) = as_Klass(java_class);
860 return T_OBJECT;
861 }
862 }
863
864
865 oop java_lang_Class::primitive_mirror(BasicType t) {
866 oop mirror = Universe::java_mirror(t);
867 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class");
868 assert(java_lang_Class::is_primitive(mirror), "must be primitive");
869 return mirror;
870 }
871
872 bool java_lang_Class::offsets_computed = false;
873 int java_lang_Class::classRedefinedCount_offset = -1;
874
875 void java_lang_Class::compute_offsets() {
876 assert(!offsets_computed, "offsets should be initialized only once");
877 offsets_computed = true;
878
879 Klass* klass_oop = SystemDictionary::Class_klass();
880 // The classRedefinedCount field is only present starting in 1.5,
881 // so don't go fatal.
882 compute_optional_offset(classRedefinedCount_offset,
883 klass_oop, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature());
884
885 // Needs to be optional because the old build runs Queens during bootstrapping
886 // and jdk8-9 doesn't have coordinated pushes yet.
887 compute_optional_offset(_class_loader_offset,
888 klass_oop, vmSymbols::classLoader_name(),
889 vmSymbols::classloader_signature());
890
891 compute_optional_offset(_component_mirror_offset,
892 klass_oop, vmSymbols::componentType_name(),
893 vmSymbols::class_signature());
894
895 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
896 }
897
898 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
899 if (classRedefinedCount_offset == -1) {
900 // If we don't have an offset for it then just return -1 as a marker.
901 return -1;
902 }
903
904 return the_class_mirror->int_field(classRedefinedCount_offset);
905 }
906
907 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
908 if (classRedefinedCount_offset == -1) {
909 // If we don't have an offset for it then nothing to set.
910 return;
911 }
912
913 the_class_mirror->int_field_put(classRedefinedCount_offset, value);
914 }
915
916
917 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
918 // platform thread structure, and a eetop offset which was used for thread
919 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
920 // merged, so in the HotSpot VM we just use the eetop field for the thread
921 // instead of the privateInfo_offset.
922 //
923 // Note: The stackSize field is only present starting in 1.4.
924
925 int java_lang_Thread::_name_offset = 0;
926 int java_lang_Thread::_group_offset = 0;
927 int java_lang_Thread::_contextClassLoader_offset = 0;
928 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
929 int java_lang_Thread::_priority_offset = 0;
930 int java_lang_Thread::_eetop_offset = 0;
931 int java_lang_Thread::_daemon_offset = 0;
932 int java_lang_Thread::_stillborn_offset = 0;
933 int java_lang_Thread::_stackSize_offset = 0;
934 int java_lang_Thread::_tid_offset = 0;
935 int java_lang_Thread::_thread_status_offset = 0;
936 int java_lang_Thread::_park_blocker_offset = 0;
937 int java_lang_Thread::_park_event_offset = 0 ;
938
939
940 void java_lang_Thread::compute_offsets() {
941 assert(_group_offset == 0, "offsets should be initialized only once");
942
943 Klass* k = SystemDictionary::Thread_klass();
944 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::char_array_signature());
945 compute_offset(_group_offset, k, vmSymbols::group_name(), vmSymbols::threadgroup_signature());
946 compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature());
947 compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature());
948 compute_offset(_priority_offset, k, vmSymbols::priority_name(), vmSymbols::int_signature());
949 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
950 compute_offset(_eetop_offset, k, vmSymbols::eetop_name(), vmSymbols::long_signature());
951 compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature());
952 // The stackSize field is only present starting in 1.4, so don't go fatal.
953 compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature());
954 // The tid and thread_status fields are only present starting in 1.5, so don't go fatal.
955 compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature());
956 compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature());
957 // The parkBlocker field is only present starting in 1.6, so don't go fatal.
958 compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature());
959 compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(),
960 vmSymbols::long_signature());
961 }
962
963
964 JavaThread* java_lang_Thread::thread(oop java_thread) {
965 return (JavaThread*)java_thread->address_field(_eetop_offset);
966 }
967
968
969 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
970 java_thread->address_field_put(_eetop_offset, (address)thread);
971 }
972
973
974 typeArrayOop java_lang_Thread::name(oop java_thread) {
975 oop name = java_thread->obj_field(_name_offset);
976 assert(name == NULL || (name->is_typeArray() && TypeArrayKlass::cast(name->klass())->element_type() == T_CHAR), "just checking");
977 return typeArrayOop(name);
978 }
979
980
981 void java_lang_Thread::set_name(oop java_thread, typeArrayOop name) {
982 assert(java_thread->obj_field(_name_offset) == NULL, "name should be NULL");
983 java_thread->obj_field_put(_name_offset, name);
984 }
985
986
987 ThreadPriority java_lang_Thread::priority(oop java_thread) {
988 return (ThreadPriority)java_thread->int_field(_priority_offset);
989 }
990
991
992 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
993 java_thread->int_field_put(_priority_offset, priority);
994 }
995
996
997 oop java_lang_Thread::threadGroup(oop java_thread) {
998 return java_thread->obj_field(_group_offset);
999 }
1000
1001
1002 bool java_lang_Thread::is_stillborn(oop java_thread) {
1003 return java_thread->bool_field(_stillborn_offset) != 0;
1004 }
1005
1006
1007 // We never have reason to turn the stillborn bit off
1008 void java_lang_Thread::set_stillborn(oop java_thread) {
1009 java_thread->bool_field_put(_stillborn_offset, true);
1010 }
1011
1012
1013 bool java_lang_Thread::is_alive(oop java_thread) {
1014 JavaThread* thr = java_lang_Thread::thread(java_thread);
1015 return (thr != NULL);
1016 }
1017
1018
1019 bool java_lang_Thread::is_daemon(oop java_thread) {
1020 return java_thread->bool_field(_daemon_offset) != 0;
1021 }
1022
1023
1024 void java_lang_Thread::set_daemon(oop java_thread) {
1025 java_thread->bool_field_put(_daemon_offset, true);
1026 }
1027
1028 oop java_lang_Thread::context_class_loader(oop java_thread) {
1029 return java_thread->obj_field(_contextClassLoader_offset);
1030 }
1031
1032 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
1033 return java_thread->obj_field(_inheritedAccessControlContext_offset);
1034 }
1035
1036
1037 jlong java_lang_Thread::stackSize(oop java_thread) {
1038 if (_stackSize_offset > 0) {
1039 return java_thread->long_field(_stackSize_offset);
1040 } else {
1041 return 0;
1042 }
1043 }
1044
1045 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1046 void java_lang_Thread::set_thread_status(oop java_thread,
1047 java_lang_Thread::ThreadStatus status) {
1048 // The threadStatus is only present starting in 1.5
1049 if (_thread_status_offset > 0) {
1050 java_thread->int_field_put(_thread_status_offset, status);
1051 }
1052 }
1053
1054 // Read thread status value from threadStatus field in java.lang.Thread java class.
1055 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1056 assert(Thread::current()->is_Watcher_thread() || Thread::current()->is_VM_thread() ||
1057 JavaThread::current()->thread_state() == _thread_in_vm,
1058 "Java Thread is not running in vm");
1059 // The threadStatus is only present starting in 1.5
1060 if (_thread_status_offset > 0) {
1061 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1062 } else {
1063 // All we can easily figure out is if it is alive, but that is
1064 // enough info for a valid unknown status.
1065 // These aren't restricted to valid set ThreadStatus values, so
1066 // use JVMTI values and cast.
1067 JavaThread* thr = java_lang_Thread::thread(java_thread);
1068 if (thr == NULL) {
1069 // the thread hasn't run yet or is in the process of exiting
1070 return NEW;
1071 }
1072 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE;
1073 }
1074 }
1075
1076
1077 jlong java_lang_Thread::thread_id(oop java_thread) {
1078 // The thread ID field is only present starting in 1.5
1079 if (_tid_offset > 0) {
1080 return java_thread->long_field(_tid_offset);
1081 } else {
1082 return 0;
1083 }
1084 }
1085
1086 oop java_lang_Thread::park_blocker(oop java_thread) {
1087 assert(JDK_Version::current().supports_thread_park_blocker() &&
1088 _park_blocker_offset != 0, "Must support parkBlocker field");
1089
1090 if (_park_blocker_offset > 0) {
1091 return java_thread->obj_field(_park_blocker_offset);
1092 }
1093
1094 return NULL;
1095 }
1096
1097 jlong java_lang_Thread::park_event(oop java_thread) {
1098 if (_park_event_offset > 0) {
1099 return java_thread->long_field(_park_event_offset);
1100 }
1101 return 0;
1102 }
1103
1104 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) {
1105 if (_park_event_offset > 0) {
1106 java_thread->long_field_put(_park_event_offset, ptr);
1107 return true;
1108 }
1109 return false;
1110 }
1111
1112
1113 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1114 assert(_thread_status_offset != 0, "Must have thread status");
1115 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1116 switch (status) {
1117 case NEW : return "NEW";
1118 case RUNNABLE : return "RUNNABLE";
1119 case SLEEPING : return "TIMED_WAITING (sleeping)";
1120 case IN_OBJECT_WAIT : return "WAITING (on object monitor)";
1121 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
1122 case PARKED : return "WAITING (parking)";
1123 case PARKED_TIMED : return "TIMED_WAITING (parking)";
1124 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1125 case TERMINATED : return "TERMINATED";
1126 default : return "UNKNOWN";
1127 };
1128 }
1129 int java_lang_ThreadGroup::_parent_offset = 0;
1130 int java_lang_ThreadGroup::_name_offset = 0;
1131 int java_lang_ThreadGroup::_threads_offset = 0;
1132 int java_lang_ThreadGroup::_groups_offset = 0;
1133 int java_lang_ThreadGroup::_maxPriority_offset = 0;
1134 int java_lang_ThreadGroup::_destroyed_offset = 0;
1135 int java_lang_ThreadGroup::_daemon_offset = 0;
1136 int java_lang_ThreadGroup::_vmAllowSuspension_offset = 0;
1137 int java_lang_ThreadGroup::_nthreads_offset = 0;
1138 int java_lang_ThreadGroup::_ngroups_offset = 0;
1139
1140 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
1141 assert(java_thread_group->is_oop(), "thread group must be oop");
1142 return java_thread_group->obj_field(_parent_offset);
1143 }
1144
1145 // ("name as oop" accessor is not necessary)
1146
1147 typeArrayOop java_lang_ThreadGroup::name(oop java_thread_group) {
1148 oop name = java_thread_group->obj_field(_name_offset);
1149 // ThreadGroup.name can be null
1150 return name == NULL ? (typeArrayOop)NULL : java_lang_String::value(name);
1151 }
1152
1153 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
1154 assert(java_thread_group->is_oop(), "thread group must be oop");
1155 return java_thread_group->int_field(_nthreads_offset);
1156 }
1157
1158 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
1159 oop threads = java_thread_group->obj_field(_threads_offset);
1160 assert(threads != NULL, "threadgroups should have threads");
1161 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
1162 return objArrayOop(threads);
1163 }
1164
1165 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
1166 assert(java_thread_group->is_oop(), "thread group must be oop");
1167 return java_thread_group->int_field(_ngroups_offset);
1168 }
1169
1170 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
1171 oop groups = java_thread_group->obj_field(_groups_offset);
1172 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
1173 return objArrayOop(groups);
1174 }
1175
1176 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1177 assert(java_thread_group->is_oop(), "thread group must be oop");
1178 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1179 }
1180
1181 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
1182 assert(java_thread_group->is_oop(), "thread group must be oop");
1183 return java_thread_group->bool_field(_destroyed_offset) != 0;
1184 }
1185
1186 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1187 assert(java_thread_group->is_oop(), "thread group must be oop");
1188 return java_thread_group->bool_field(_daemon_offset) != 0;
1189 }
1190
1191 bool java_lang_ThreadGroup::is_vmAllowSuspension(oop java_thread_group) {
1192 assert(java_thread_group->is_oop(), "thread group must be oop");
1193 return java_thread_group->bool_field(_vmAllowSuspension_offset) != 0;
1194 }
1195
1196 void java_lang_ThreadGroup::compute_offsets() {
1197 assert(_parent_offset == 0, "offsets should be initialized only once");
1198
1199 Klass* k = SystemDictionary::ThreadGroup_klass();
1200
1201 compute_offset(_parent_offset, k, vmSymbols::parent_name(), vmSymbols::threadgroup_signature());
1202 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1203 compute_offset(_threads_offset, k, vmSymbols::threads_name(), vmSymbols::thread_array_signature());
1204 compute_offset(_groups_offset, k, vmSymbols::groups_name(), vmSymbols::threadgroup_array_signature());
1205 compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature());
1206 compute_offset(_destroyed_offset, k, vmSymbols::destroyed_name(), vmSymbols::bool_signature());
1207 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
1208 compute_offset(_vmAllowSuspension_offset, k, vmSymbols::vmAllowSuspension_name(), vmSymbols::bool_signature());
1209 compute_offset(_nthreads_offset, k, vmSymbols::nthreads_name(), vmSymbols::int_signature());
1210 compute_offset(_ngroups_offset, k, vmSymbols::ngroups_name(), vmSymbols::int_signature());
1211 }
1212
1213 oop java_lang_Throwable::unassigned_stacktrace() {
1214 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Throwable_klass());
1215 address addr = ik->static_field_addr(static_unassigned_stacktrace_offset);
1216 if (UseCompressedOops) {
1217 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
1218 } else {
1219 return oopDesc::load_decode_heap_oop((oop*)addr);
1220 }
1221 }
1222
1223 oop java_lang_Throwable::backtrace(oop throwable) {
1224 return throwable->obj_field_acquire(backtrace_offset);
1225 }
1226
1227
1228 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
1229 throwable->release_obj_field_put(backtrace_offset, value);
1230 }
1231
1232
1233 oop java_lang_Throwable::message(oop throwable) {
1234 return throwable->obj_field(detailMessage_offset);
1235 }
1236
1237
1238 oop java_lang_Throwable::message(Handle throwable) {
1239 return throwable->obj_field(detailMessage_offset);
1240 }
1241
1242
1243 // Return Symbol for detailed_message or NULL
1244 Symbol* java_lang_Throwable::detail_message(oop throwable) {
1245 PRESERVE_EXCEPTION_MARK; // Keep original exception
1246 oop detailed_message = java_lang_Throwable::message(throwable);
1247 if (detailed_message != NULL) {
1248 return java_lang_String::as_symbol(detailed_message, THREAD);
1249 }
1250 return NULL;
1251 }
1252
1253 void java_lang_Throwable::set_message(oop throwable, oop value) {
1254 throwable->obj_field_put(detailMessage_offset, value);
1255 }
1256
1257
1258 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
1259 throwable->obj_field_put(stackTrace_offset, st_element_array);
1260 }
1261
1262 void java_lang_Throwable::clear_stacktrace(oop throwable) {
1263 set_stacktrace(throwable, NULL);
1264 }
1265
1266
1267 void java_lang_Throwable::print(oop throwable, outputStream* st) {
1268 ResourceMark rm;
1269 Klass* k = throwable->klass();
1270 assert(k != NULL, "just checking");
1271 st->print("%s", InstanceKlass::cast(k)->external_name());
1272 oop msg = message(throwable);
1273 if (msg != NULL) {
1274 st->print(": %s", java_lang_String::as_utf8_string(msg));
1275 }
1276 }
1277
1278
1279 void java_lang_Throwable::print(Handle throwable, outputStream* st) {
1280 ResourceMark rm;
1281 Klass* k = throwable->klass();
1282 assert(k != NULL, "just checking");
1283 st->print("%s", InstanceKlass::cast(k)->external_name());
1284 oop msg = message(throwable);
1285 if (msg != NULL) {
1286 st->print(": %s", java_lang_String::as_utf8_string(msg));
1287 }
1288 }
1289
1290 // After this many redefines, the stack trace is unreliable.
1291 const int MAX_VERSION = USHRT_MAX;
1292
1293 // Helper backtrace functions to store bci|version together.
1294 static inline int merge_bci_and_version(int bci, int version) {
1295 // only store u2 for version, checking for overflow.
1296 if (version > USHRT_MAX || version < 0) version = MAX_VERSION;
1297 assert((jushort)bci == bci, "bci should be short");
1298 return build_int_from_shorts(version, bci);
1299 }
1300
1301 static inline int bci_at(unsigned int merged) {
1302 return extract_high_short_from_int(merged);
1303 }
1304 static inline int version_at(unsigned int merged) {
1305 return extract_low_short_from_int(merged);
1306 }
1307
1308 static inline bool version_matches(Method* method, int version) {
1309 return (method->constants()->version() == version && version < MAX_VERSION);
1310 }
1311
1312 static inline int get_line_number(Method* method, int bci) {
1313 int line_number = 0;
1314 if (method->is_native()) {
1315 // Negative value different from -1 below, enabling Java code in
1316 // class java.lang.StackTraceElement to distinguish "native" from
1317 // "no LineNumberTable". JDK tests for -2.
1318 line_number = -2;
1319 } else {
1320 // Returns -1 if no LineNumberTable, and otherwise actual line number
1321 line_number = method->line_number_from_bci(bci);
1322 if (line_number == -1 && ShowHiddenFrames) {
1323 line_number = bci + 1000000;
1324 }
1325 }
1326 return line_number;
1327 }
1328
1329 // This class provides a simple wrapper over the internal structure of
1330 // exception backtrace to insulate users of the backtrace from needing
1331 // to know what it looks like.
1332 class BacktraceBuilder: public StackObj {
1333 private:
1334 Handle _backtrace;
1335 objArrayOop _head;
1336 typeArrayOop _methods;
1337 typeArrayOop _bcis;
1338 objArrayOop _mirrors;
1339 int _index;
1340 No_Safepoint_Verifier _nsv;
1341
1342 public:
1343
1344 enum {
1345 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
1346 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
1347 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
1348 trace_next_offset = java_lang_Throwable::trace_next_offset,
1349 trace_size = java_lang_Throwable::trace_size,
1350 trace_chunk_size = java_lang_Throwable::trace_chunk_size
1351 };
1352
1353 // get info out of chunks
1354 static typeArrayOop get_methods(objArrayHandle chunk) {
1355 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
1356 assert(methods != NULL, "method array should be initialized in backtrace");
1357 return methods;
1358 }
1359 static typeArrayOop get_bcis(objArrayHandle chunk) {
1360 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1361 assert(bcis != NULL, "bci array should be initialized in backtrace");
1362 return bcis;
1363 }
1364 static objArrayOop get_mirrors(objArrayHandle chunk) {
1365 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
1366 assert(mirrors != NULL, "mirror array should be initialized in backtrace");
1367 return mirrors;
1368 }
1369
1370 // constructor for new backtrace
1371 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _mirrors(NULL) {
1372 expand(CHECK);
1373 _backtrace = _head;
1374 _index = 0;
1375 }
1376
1377 BacktraceBuilder(objArrayHandle backtrace) {
1378 _methods = get_methods(backtrace);
1379 _bcis = get_bcis(backtrace);
1380 _mirrors = get_mirrors(backtrace);
1381 assert(_methods->length() == _bcis->length() &&
1382 _methods->length() == _mirrors->length(),
1383 "method and source information arrays should match");
1384
1385 // head is the preallocated backtrace
1386 _backtrace = _head = backtrace();
1387 _index = 0;
1388 }
1389
1390 void expand(TRAPS) {
1391 objArrayHandle old_head(THREAD, _head);
1392 Pause_No_Safepoint_Verifier pnsv(&_nsv);
1393
1394 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
1395 objArrayHandle new_head(THREAD, head);
1396
1397 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1398 typeArrayHandle new_methods(THREAD, methods);
1399
1400 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
1401 typeArrayHandle new_bcis(THREAD, bcis);
1402
1403 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
1404 objArrayHandle new_mirrors(THREAD, mirrors);
1405
1406 if (!old_head.is_null()) {
1407 old_head->obj_at_put(trace_next_offset, new_head());
1408 }
1409 new_head->obj_at_put(trace_methods_offset, new_methods());
1410 new_head->obj_at_put(trace_bcis_offset, new_bcis());
1411 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
1412
1413 _head = new_head();
1414 _methods = new_methods();
1415 _bcis = new_bcis();
1416 _mirrors = new_mirrors();
1417 _index = 0;
1418 }
1419
1420 oop backtrace() {
1421 return _backtrace();
1422 }
1423
1424 inline void push(Method* method, int bci, TRAPS) {
1425 // Smear the -1 bci to 0 since the array only holds unsigned
1426 // shorts. The later line number lookup would just smear the -1
1427 // to a 0 even if it could be recorded.
1428 if (bci == SynchronizationEntryBCI) bci = 0;
1429
1430 if (_index >= trace_chunk_size) {
1431 methodHandle mhandle(THREAD, method);
1432 expand(CHECK);
1433 method = mhandle();
1434 }
1435
1436 _methods->short_at_put(_index, method->method_idnum());
1437 _bcis->int_at_put(_index, merge_bci_and_version(bci, method->constants()->version()));
1438
1439 // We need to save the mirrors in the backtrace to keep the class
1440 // from being unloaded while we still have this stack trace.
1441 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror");
1442 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
1443 _index++;
1444 }
1445
1446 };
1447
1448 // Print stack trace element to resource allocated buffer
1449 char* java_lang_Throwable::print_stack_element_to_buffer(Handle mirror,
1450 int method_id, int version, int bci) {
1451
1452 // Get strings and string lengths
1453 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
1454 const char* klass_name = holder->external_name();
1455 int buf_len = (int)strlen(klass_name);
1456
1457 // The method id may point to an obsolete method, can't get more stack information
1458 Method* method = holder->method_with_idnum(method_id);
1459 if (method == NULL) {
1460 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
1461 // This is what the java code prints in this case - added Redefined
1462 sprintf(buf, "\tat %s.null (Redefined)", klass_name);
1463 return buf;
1464 }
1465
1466 char* method_name = method->name()->as_C_string();
1467 buf_len += (int)strlen(method_name);
1468
1469 char* source_file_name = NULL;
1470 if (version_matches(method, version)) {
1471 Symbol* source = holder->source_file_name();
1472 if (source != NULL) {
1473 source_file_name = source->as_C_string();
1474 buf_len += (int)strlen(source_file_name);
1475 }
1476 }
1477
1478 // Allocate temporary buffer with extra space for formatting and line number
1479 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
1480
1481 // Print stack trace line in buffer
1482 sprintf(buf, "\tat %s.%s", klass_name, method_name);
1483
1484 if (!version_matches(method, version)) {
1485 strcat(buf, "(Redefined)");
1486 } else {
1487 int line_number = get_line_number(method, bci);
1488 if (line_number == -2) {
1489 strcat(buf, "(Native Method)");
1490 } else {
1491 if (source_file_name != NULL && (line_number != -1)) {
1492 // Sourcename and linenumber
1493 sprintf(buf + (int)strlen(buf), "(%s:%d)", source_file_name, line_number);
1494 } else if (source_file_name != NULL) {
1495 // Just sourcename
1496 sprintf(buf + (int)strlen(buf), "(%s)", source_file_name);
1497 } else {
1498 // Neither sourcename nor linenumber
1499 sprintf(buf + (int)strlen(buf), "(Unknown Source)");
1500 }
1501 nmethod* nm = method->code();
1502 if (WizardMode && nm != NULL) {
1503 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
1504 }
1505 }
1506 }
1507
1508 return buf;
1509 }
1510
1511 void java_lang_Throwable::print_stack_element(outputStream *st, Handle mirror,
1512 int method_id, int version, int bci) {
1513 ResourceMark rm;
1514 char* buf = print_stack_element_to_buffer(mirror, method_id, version, bci);
1515 st->print_cr("%s", buf);
1516 }
1517
1518 void java_lang_Throwable::print_stack_element(outputStream *st, methodHandle method, int bci) {
1519 Handle mirror = method->method_holder()->java_mirror();
1520 int method_id = method->method_idnum();
1521 int version = method->constants()->version();
1522 print_stack_element(st, mirror, method_id, version, bci);
1523 }
1524
1525 const char* java_lang_Throwable::no_stack_trace_message() {
1526 return "\t<<no stack trace available>>";
1527 }
1528
1529
1530 // Currently used only for exceptions occurring during startup
1531 void java_lang_Throwable::print_stack_trace(oop throwable, outputStream* st) {
1532 Thread *THREAD = Thread::current();
1533 Handle h_throwable(THREAD, throwable);
1534 while (h_throwable.not_null()) {
1535 objArrayHandle result (THREAD, objArrayOop(backtrace(h_throwable())));
1536 if (result.is_null()) {
1537 st->print_cr("%s", no_stack_trace_message());
1538 return;
1539 }
1540
1541 while (result.not_null()) {
1542
1543 // Get method id, bci, version and mirror from chunk
1544 typeArrayHandle methods (THREAD, BacktraceBuilder::get_methods(result));
1545 typeArrayHandle bcis (THREAD, BacktraceBuilder::get_bcis(result));
1546 objArrayHandle mirrors (THREAD, BacktraceBuilder::get_mirrors(result));
1547
1548 int length = methods()->length();
1549 for (int index = 0; index < length; index++) {
1550 Handle mirror(THREAD, mirrors->obj_at(index));
1551 // NULL mirror means end of stack trace
1552 if (mirror.is_null()) goto handle_cause;
1553 int method = methods->short_at(index);
1554 int version = version_at(bcis->int_at(index));
1555 int bci = bci_at(bcis->int_at(index));
1556 print_stack_element(st, mirror, method, version, bci);
1557 }
1558 result = objArrayHandle(THREAD, objArrayOop(result->obj_at(trace_next_offset)));
1559 }
1560 handle_cause:
1561 {
1562 EXCEPTION_MARK;
1563 JavaValue cause(T_OBJECT);
1564 JavaCalls::call_virtual(&cause,
1565 h_throwable,
1566 KlassHandle(THREAD, h_throwable->klass()),
1567 vmSymbols::getCause_name(),
1568 vmSymbols::void_throwable_signature(),
1569 THREAD);
1570 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
1571 if (HAS_PENDING_EXCEPTION) {
1572 CLEAR_PENDING_EXCEPTION;
1573 h_throwable = Handle();
1574 } else {
1575 h_throwable = Handle(THREAD, (oop) cause.get_jobject());
1576 if (h_throwable.not_null()) {
1577 st->print("Caused by: ");
1578 print(h_throwable, st);
1579 st->cr();
1580 }
1581 }
1582 }
1583 }
1584 }
1585
1586 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method, TRAPS) {
1587 if (!StackTraceInThrowable) return;
1588 ResourceMark rm(THREAD);
1589
1590 // Start out by clearing the backtrace for this object, in case the VM
1591 // runs out of memory while allocating the stack trace
1592 set_backtrace(throwable(), NULL);
1593 // Clear lazily constructed Java level stacktrace if refilling occurs
1594 // This is unnecessary in 1.7+ but harmless
1595 clear_stacktrace(throwable());
1596
1597 int max_depth = MaxJavaStackTraceDepth;
1598 JavaThread* thread = (JavaThread*)THREAD;
1599 BacktraceBuilder bt(CHECK);
1600
1601 // If there is no Java frame just return the method that was being called
1602 // with bci 0
1603 if (!thread->has_last_Java_frame()) {
1604 if (max_depth >= 1 && method() != NULL) {
1605 bt.push(method(), 0, CHECK);
1606 set_backtrace(throwable(), bt.backtrace());
1607 }
1608 return;
1609 }
1610
1611 // Instead of using vframe directly, this version of fill_in_stack_trace
1612 // basically handles everything by hand. This significantly improved the
1613 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
1614 // See bug 6333838 for more details.
1615 // The "ASSERT" here is to verify this method generates the exactly same stack
1616 // trace as utilizing vframe.
1617 #ifdef ASSERT
1618 vframeStream st(thread);
1619 methodHandle st_method(THREAD, st.method());
1620 #endif
1621 int total_count = 0;
1622 RegisterMap map(thread, false);
1623 int decode_offset = 0;
1624 nmethod* nm = NULL;
1625 bool skip_fillInStackTrace_check = false;
1626 bool skip_throwableInit_check = false;
1627 bool skip_hidden = !ShowHiddenFrames;
1628
1629 for (frame fr = thread->last_frame(); max_depth != total_count;) {
1630 Method* method = NULL;
1631 int bci = 0;
1632
1633 // Compiled java method case.
1634 if (decode_offset != 0) {
1635 DebugInfoReadStream stream(nm, decode_offset);
1636 decode_offset = stream.read_int();
1637 method = (Method*)nm->metadata_at(stream.read_int());
1638 bci = stream.read_bci();
1639 } else {
1640 if (fr.is_first_frame()) break;
1641 address pc = fr.pc();
1642 if (fr.is_interpreted_frame()) {
1643 address bcp = fr.interpreter_frame_bcp();
1644 method = fr.interpreter_frame_method();
1645 bci = method->bci_from(bcp);
1646 fr = fr.sender(&map);
1647 } else {
1648 CodeBlob* cb = fr.cb();
1649 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
1650 // but non nmethod
1651 fr = fr.sender(&map);
1652 if (cb == NULL || !cb->is_nmethod()) {
1653 continue;
1654 }
1655 nm = (nmethod*)cb;
1656 if (nm->method()->is_native()) {
1657 method = nm->method();
1658 bci = 0;
1659 } else {
1660 PcDesc* pd = nm->pc_desc_at(pc);
1661 decode_offset = pd->scope_decode_offset();
1662 // if decode_offset is not equal to 0, it will execute the
1663 // "compiled java method case" at the beginning of the loop.
1664 continue;
1665 }
1666 }
1667 }
1668 #ifdef ASSERT
1669 assert(st_method() == method && st.bci() == bci,
1670 "Wrong stack trace");
1671 st.next();
1672 // vframeStream::method isn't GC-safe so store off a copy
1673 // of the Method* in case we GC.
1674 if (!st.at_end()) {
1675 st_method = st.method();
1676 }
1677 #endif
1678
1679 // the format of the stacktrace will be:
1680 // - 1 or more fillInStackTrace frames for the exception class (skipped)
1681 // - 0 or more <init> methods for the exception class (skipped)
1682 // - rest of the stack
1683
1684 if (!skip_fillInStackTrace_check) {
1685 if ((method->name() == vmSymbols::fillInStackTrace_name() ||
1686 method->name() == vmSymbols::fillInStackTrace0_name()) &&
1687 throwable->is_a(method->method_holder())) {
1688 continue;
1689 }
1690 else {
1691 skip_fillInStackTrace_check = true; // gone past them all
1692 }
1693 }
1694 if (!skip_throwableInit_check) {
1695 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
1696
1697 // skip <init> methods of the exception class and superclasses
1698 // This is simlar to classic VM.
1699 if (method->name() == vmSymbols::object_initializer_name() &&
1700 throwable->is_a(method->method_holder())) {
1701 continue;
1702 } else {
1703 // there are none or we've seen them all - either way stop checking
1704 skip_throwableInit_check = true;
1705 }
1706 }
1707 if (method->is_hidden()) {
1708 if (skip_hidden) continue;
1709 }
1710 bt.push(method, bci, CHECK);
1711 total_count++;
1712 }
1713
1714 // Put completed stack trace into throwable object
1715 set_backtrace(throwable(), bt.backtrace());
1716 }
1717
1718 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method) {
1719 // No-op if stack trace is disabled
1720 if (!StackTraceInThrowable) {
1721 return;
1722 }
1723
1724 // Disable stack traces for some preallocated out of memory errors
1725 if (!Universe::should_fill_in_stack_trace(throwable)) {
1726 return;
1727 }
1728
1729 PRESERVE_EXCEPTION_MARK;
1730
1731 JavaThread* thread = JavaThread::active();
1732 fill_in_stack_trace(throwable, method, thread);
1733 // ignore exceptions thrown during stack trace filling
1734 CLEAR_PENDING_EXCEPTION;
1735 }
1736
1737 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
1738 // Allocate stack trace - backtrace is created but not filled in
1739
1740 // No-op if stack trace is disabled
1741 if (!StackTraceInThrowable) return;
1742 BacktraceBuilder bt(CHECK); // creates a backtrace
1743 set_backtrace(throwable(), bt.backtrace());
1744 }
1745
1746
1747 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
1748 // Fill in stack trace into preallocated backtrace (no GC)
1749
1750 // No-op if stack trace is disabled
1751 if (!StackTraceInThrowable) return;
1752
1753 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
1754
1755 JavaThread* THREAD = JavaThread::current();
1756
1757 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
1758 assert(backtrace.not_null(), "backtrace should have been preallocated");
1759
1760 ResourceMark rm(THREAD);
1761 vframeStream st(THREAD);
1762
1763 BacktraceBuilder bt(backtrace);
1764
1765 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
1766 // methods as preallocated errors aren't created by "java" code.
1767
1768 // fill in as much stack trace as possible
1769 typeArrayOop methods = BacktraceBuilder::get_methods(backtrace);
1770 int max_chunks = MIN2(methods->length(), (int)MaxJavaStackTraceDepth);
1771 int chunk_count = 0;
1772
1773 for (;!st.at_end(); st.next()) {
1774 bt.push(st.method(), st.bci(), CHECK);
1775 chunk_count++;
1776
1777 // Bail-out for deep stacks
1778 if (chunk_count >= max_chunks) break;
1779 }
1780
1781 // We support the Throwable immutability protocol defined for Java 7.
1782 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
1783 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized");
1784 }
1785
1786
1787 int java_lang_Throwable::get_stack_trace_depth(oop throwable, TRAPS) {
1788 if (throwable == NULL) {
1789 THROW_0(vmSymbols::java_lang_NullPointerException());
1790 }
1791 objArrayOop chunk = objArrayOop(backtrace(throwable));
1792 int depth = 0;
1793 if (chunk != NULL) {
1794 // Iterate over chunks and count full ones
1795 while (true) {
1796 objArrayOop next = objArrayOop(chunk->obj_at(trace_next_offset));
1797 if (next == NULL) break;
1798 depth += trace_chunk_size;
1799 chunk = next;
1800 }
1801 assert(chunk != NULL && chunk->obj_at(trace_next_offset) == NULL, "sanity check");
1802 // Count element in remaining partial chunk. NULL value for mirror
1803 // marks the end of the stack trace elements that are saved.
1804 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk);
1805 assert(mirrors != NULL, "sanity check");
1806 for (int i = 0; i < mirrors->length(); i++) {
1807 if (mirrors->obj_at(i) == NULL) break;
1808 depth++;
1809 }
1810 }
1811 return depth;
1812 }
1813
1814
1815 oop java_lang_Throwable::get_stack_trace_element(oop throwable, int index, TRAPS) {
1816 if (throwable == NULL) {
1817 THROW_0(vmSymbols::java_lang_NullPointerException());
1818 }
1819 if (index < 0) {
1820 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1821 }
1822 // Compute how many chunks to skip and index into actual chunk
1823 objArrayOop chunk = objArrayOop(backtrace(throwable));
1824 int skip_chunks = index / trace_chunk_size;
1825 int chunk_index = index % trace_chunk_size;
1826 while (chunk != NULL && skip_chunks > 0) {
1827 chunk = objArrayOop(chunk->obj_at(trace_next_offset));
1828 skip_chunks--;
1829 }
1830 if (chunk == NULL) {
1831 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1832 }
1833 // Get method id, bci, version and mirror from chunk
1834 typeArrayOop methods = BacktraceBuilder::get_methods(chunk);
1835 typeArrayOop bcis = BacktraceBuilder::get_bcis(chunk);
1836 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk);
1837
1838 assert(methods != NULL && bcis != NULL && mirrors != NULL, "sanity check");
1839
1840 int method = methods->short_at(chunk_index);
1841 int version = version_at(bcis->int_at(chunk_index));
1842 int bci = bci_at(bcis->int_at(chunk_index));
1843 Handle mirror(THREAD, mirrors->obj_at(chunk_index));
1844
1845 // Chunk can be partial full
1846 if (mirror.is_null()) {
1847 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1848 }
1849
1850 oop element = java_lang_StackTraceElement::create(mirror, method, version, bci, CHECK_0);
1851 return element;
1852 }
1853
1854 oop java_lang_StackTraceElement::create(Handle mirror, int method_id,
1855 int version, int bci, TRAPS) {
1856 // Allocate java.lang.StackTraceElement instance
1857 Klass* k = SystemDictionary::StackTraceElement_klass();
1858 assert(k != NULL, "must be loaded in 1.4+");
1859 instanceKlassHandle ik (THREAD, k);
1860 if (ik->should_be_initialized()) {
1861 ik->initialize(CHECK_0);
1862 }
1863
1864 Handle element = ik->allocate_instance_handle(CHECK_0);
1865 // Fill in class name
1866 ResourceMark rm(THREAD);
1867 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
1868 const char* str = holder->external_name();
1869 oop classname = StringTable::intern((char*) str, CHECK_0);
1870 java_lang_StackTraceElement::set_declaringClass(element(), classname);
1871
1872 Method* method = holder->method_with_idnum(method_id);
1873 // Method on stack may be obsolete because it was redefined so cannot be
1874 // found by idnum.
1875 if (method == NULL) {
1876 // leave name and fileName null
1877 java_lang_StackTraceElement::set_lineNumber(element(), -1);
1878 return element();
1879 }
1880
1881 // Fill in method name
1882 oop methodname = StringTable::intern(method->name(), CHECK_0);
1883 java_lang_StackTraceElement::set_methodName(element(), methodname);
1884
1885 if (!version_matches(method, version)) {
1886 // The method was redefined, accurate line number information isn't available
1887 java_lang_StackTraceElement::set_fileName(element(), NULL);
1888 java_lang_StackTraceElement::set_lineNumber(element(), -1);
1889 } else {
1890 // Fill in source file name and line number.
1891 Symbol* source = holder->source_file_name();
1892 if (ShowHiddenFrames && source == NULL)
1893 source = vmSymbols::unknown_class_name();
1894 oop filename = StringTable::intern(source, CHECK_0);
1895 java_lang_StackTraceElement::set_fileName(element(), filename);
1896
1897 int line_number = get_line_number(method, bci);
1898 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
1899 }
1900 return element();
1901 }
1902
1903 oop java_lang_StackTraceElement::create(methodHandle method, int bci, TRAPS) {
1904 Handle mirror (THREAD, method->method_holder()->java_mirror());
1905 int method_id = method->method_idnum();
1906 return create(mirror, method_id, method->constants()->version(), bci, THREAD);
1907 }
1908
1909 void java_lang_reflect_AccessibleObject::compute_offsets() {
1910 Klass* k = SystemDictionary::reflect_AccessibleObject_klass();
1911 compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature());
1912 }
1913
1914 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
1915 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1916 return (jboolean) reflect->bool_field(override_offset);
1917 }
1918
1919 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
1920 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1921 reflect->bool_field_put(override_offset, (int) value);
1922 }
1923
1924 void java_lang_reflect_Method::compute_offsets() {
1925 Klass* k = SystemDictionary::reflect_Method_klass();
1926 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
1927 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1928 compute_offset(returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature());
1929 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
1930 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
1931 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
1932 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
1933 // The generic signature and annotations fields are only present in 1.5
1934 signature_offset = -1;
1935 annotations_offset = -1;
1936 parameter_annotations_offset = -1;
1937 annotation_default_offset = -1;
1938 type_annotations_offset = -1;
1939 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
1940 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
1941 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
1942 compute_optional_offset(annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature());
1943 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
1944 }
1945
1946 Handle java_lang_reflect_Method::create(TRAPS) {
1947 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1948 Klass* klass = SystemDictionary::reflect_Method_klass();
1949 // This class is eagerly initialized during VM initialization, since we keep a refence
1950 // to one of the methods
1951 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
1952 return InstanceKlass::cast(klass)->allocate_instance_handle(CHECK_NH);
1953 }
1954
1955 oop java_lang_reflect_Method::clazz(oop reflect) {
1956 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1957 return reflect->obj_field(clazz_offset);
1958 }
1959
1960 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
1961 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1962 reflect->obj_field_put(clazz_offset, value);
1963 }
1964
1965 int java_lang_reflect_Method::slot(oop reflect) {
1966 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1967 return reflect->int_field(slot_offset);
1968 }
1969
1970 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
1971 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1972 reflect->int_field_put(slot_offset, value);
1973 }
1974
1975 oop java_lang_reflect_Method::name(oop method) {
1976 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1977 return method->obj_field(name_offset);
1978 }
1979
1980 void java_lang_reflect_Method::set_name(oop method, oop value) {
1981 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1982 method->obj_field_put(name_offset, value);
1983 }
1984
1985 oop java_lang_reflect_Method::return_type(oop method) {
1986 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1987 return method->obj_field(returnType_offset);
1988 }
1989
1990 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
1991 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1992 method->obj_field_put(returnType_offset, value);
1993 }
1994
1995 oop java_lang_reflect_Method::parameter_types(oop method) {
1996 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1997 return method->obj_field(parameterTypes_offset);
1998 }
1999
2000 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
2001 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2002 method->obj_field_put(parameterTypes_offset, value);
2003 }
2004
2005 oop java_lang_reflect_Method::exception_types(oop method) {
2006 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2007 return method->obj_field(exceptionTypes_offset);
2008 }
2009
2010 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
2011 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2012 method->obj_field_put(exceptionTypes_offset, value);
2013 }
2014
2015 int java_lang_reflect_Method::modifiers(oop method) {
2016 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2017 return method->int_field(modifiers_offset);
2018 }
2019
2020 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
2021 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2022 method->int_field_put(modifiers_offset, value);
2023 }
2024
2025 bool java_lang_reflect_Method::has_signature_field() {
2026 return (signature_offset >= 0);
2027 }
2028
2029 oop java_lang_reflect_Method::signature(oop method) {
2030 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2031 assert(has_signature_field(), "signature field must be present");
2032 return method->obj_field(signature_offset);
2033 }
2034
2035 void java_lang_reflect_Method::set_signature(oop method, oop value) {
2036 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2037 assert(has_signature_field(), "signature field must be present");
2038 method->obj_field_put(signature_offset, value);
2039 }
2040
2041 bool java_lang_reflect_Method::has_annotations_field() {
2042 return (annotations_offset >= 0);
2043 }
2044
2045 oop java_lang_reflect_Method::annotations(oop method) {
2046 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2047 assert(has_annotations_field(), "annotations field must be present");
2048 return method->obj_field(annotations_offset);
2049 }
2050
2051 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
2052 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2053 assert(has_annotations_field(), "annotations field must be present");
2054 method->obj_field_put(annotations_offset, value);
2055 }
2056
2057 bool java_lang_reflect_Method::has_parameter_annotations_field() {
2058 return (parameter_annotations_offset >= 0);
2059 }
2060
2061 oop java_lang_reflect_Method::parameter_annotations(oop method) {
2062 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2063 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2064 return method->obj_field(parameter_annotations_offset);
2065 }
2066
2067 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
2068 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2069 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2070 method->obj_field_put(parameter_annotations_offset, value);
2071 }
2072
2073 bool java_lang_reflect_Method::has_annotation_default_field() {
2074 return (annotation_default_offset >= 0);
2075 }
2076
2077 oop java_lang_reflect_Method::annotation_default(oop method) {
2078 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2079 assert(has_annotation_default_field(), "annotation default field must be present");
2080 return method->obj_field(annotation_default_offset);
2081 }
2082
2083 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
2084 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2085 assert(has_annotation_default_field(), "annotation default field must be present");
2086 method->obj_field_put(annotation_default_offset, value);
2087 }
2088
2089 bool java_lang_reflect_Method::has_type_annotations_field() {
2090 return (type_annotations_offset >= 0);
2091 }
2092
2093 oop java_lang_reflect_Method::type_annotations(oop method) {
2094 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2095 assert(has_type_annotations_field(), "type_annotations field must be present");
2096 return method->obj_field(type_annotations_offset);
2097 }
2098
2099 void java_lang_reflect_Method::set_type_annotations(oop method, oop value) {
2100 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2101 assert(has_type_annotations_field(), "type_annotations field must be present");
2102 method->obj_field_put(type_annotations_offset, value);
2103 }
2104
2105 void java_lang_reflect_Constructor::compute_offsets() {
2106 Klass* k = SystemDictionary::reflect_Constructor_klass();
2107 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
2108 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
2109 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
2110 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
2111 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2112 // The generic signature and annotations fields are only present in 1.5
2113 signature_offset = -1;
2114 annotations_offset = -1;
2115 parameter_annotations_offset = -1;
2116 type_annotations_offset = -1;
2117 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
2118 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
2119 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
2120 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
2121 }
2122
2123 Handle java_lang_reflect_Constructor::create(TRAPS) {
2124 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2125 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
2126 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2127 instanceKlassHandle klass (THREAD, k);
2128 // Ensure it is initialized
2129 klass->initialize(CHECK_NH);
2130 return klass->allocate_instance_handle(CHECK_NH);
2131 }
2132
2133 oop java_lang_reflect_Constructor::clazz(oop reflect) {
2134 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2135 return reflect->obj_field(clazz_offset);
2136 }
2137
2138 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
2139 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2140 reflect->obj_field_put(clazz_offset, value);
2141 }
2142
2143 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
2144 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2145 return constructor->obj_field(parameterTypes_offset);
2146 }
2147
2148 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
2149 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2150 constructor->obj_field_put(parameterTypes_offset, value);
2151 }
2152
2153 oop java_lang_reflect_Constructor::exception_types(oop constructor) {
2154 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2155 return constructor->obj_field(exceptionTypes_offset);
2156 }
2157
2158 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
2159 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2160 constructor->obj_field_put(exceptionTypes_offset, value);
2161 }
2162
2163 int java_lang_reflect_Constructor::slot(oop reflect) {
2164 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2165 return reflect->int_field(slot_offset);
2166 }
2167
2168 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
2169 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2170 reflect->int_field_put(slot_offset, value);
2171 }
2172
2173 int java_lang_reflect_Constructor::modifiers(oop constructor) {
2174 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2175 return constructor->int_field(modifiers_offset);
2176 }
2177
2178 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
2179 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2180 constructor->int_field_put(modifiers_offset, value);
2181 }
2182
2183 bool java_lang_reflect_Constructor::has_signature_field() {
2184 return (signature_offset >= 0);
2185 }
2186
2187 oop java_lang_reflect_Constructor::signature(oop constructor) {
2188 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2189 assert(has_signature_field(), "signature field must be present");
2190 return constructor->obj_field(signature_offset);
2191 }
2192
2193 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
2194 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2195 assert(has_signature_field(), "signature field must be present");
2196 constructor->obj_field_put(signature_offset, value);
2197 }
2198
2199 bool java_lang_reflect_Constructor::has_annotations_field() {
2200 return (annotations_offset >= 0);
2201 }
2202
2203 oop java_lang_reflect_Constructor::annotations(oop constructor) {
2204 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2205 assert(has_annotations_field(), "annotations field must be present");
2206 return constructor->obj_field(annotations_offset);
2207 }
2208
2209 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
2210 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2211 assert(has_annotations_field(), "annotations field must be present");
2212 constructor->obj_field_put(annotations_offset, value);
2213 }
2214
2215 bool java_lang_reflect_Constructor::has_parameter_annotations_field() {
2216 return (parameter_annotations_offset >= 0);
2217 }
2218
2219 oop java_lang_reflect_Constructor::parameter_annotations(oop method) {
2220 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2221 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2222 return method->obj_field(parameter_annotations_offset);
2223 }
2224
2225 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
2226 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2227 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2228 method->obj_field_put(parameter_annotations_offset, value);
2229 }
2230
2231 bool java_lang_reflect_Constructor::has_type_annotations_field() {
2232 return (type_annotations_offset >= 0);
2233 }
2234
2235 oop java_lang_reflect_Constructor::type_annotations(oop constructor) {
2236 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2237 assert(has_type_annotations_field(), "type_annotations field must be present");
2238 return constructor->obj_field(type_annotations_offset);
2239 }
2240
2241 void java_lang_reflect_Constructor::set_type_annotations(oop constructor, oop value) {
2242 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2243 assert(has_type_annotations_field(), "type_annotations field must be present");
2244 constructor->obj_field_put(type_annotations_offset, value);
2245 }
2246
2247 void java_lang_reflect_Field::compute_offsets() {
2248 Klass* k = SystemDictionary::reflect_Field_klass();
2249 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
2250 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2251 compute_offset(type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature());
2252 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
2253 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2254 // The generic signature and annotations fields are only present in 1.5
2255 signature_offset = -1;
2256 annotations_offset = -1;
2257 type_annotations_offset = -1;
2258 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
2259 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
2260 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
2261 }
2262
2263 Handle java_lang_reflect_Field::create(TRAPS) {
2264 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2265 Symbol* name = vmSymbols::java_lang_reflect_Field();
2266 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2267 instanceKlassHandle klass (THREAD, k);
2268 // Ensure it is initialized
2269 klass->initialize(CHECK_NH);
2270 return klass->allocate_instance_handle(CHECK_NH);
2271 }
2272
2273 oop java_lang_reflect_Field::clazz(oop reflect) {
2274 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2275 return reflect->obj_field(clazz_offset);
2276 }
2277
2278 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
2279 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2280 reflect->obj_field_put(clazz_offset, value);
2281 }
2282
2283 oop java_lang_reflect_Field::name(oop field) {
2284 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2285 return field->obj_field(name_offset);
2286 }
2287
2288 void java_lang_reflect_Field::set_name(oop field, oop value) {
2289 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2290 field->obj_field_put(name_offset, value);
2291 }
2292
2293 oop java_lang_reflect_Field::type(oop field) {
2294 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2295 return field->obj_field(type_offset);
2296 }
2297
2298 void java_lang_reflect_Field::set_type(oop field, oop value) {
2299 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2300 field->obj_field_put(type_offset, value);
2301 }
2302
2303 int java_lang_reflect_Field::slot(oop reflect) {
2304 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2305 return reflect->int_field(slot_offset);
2306 }
2307
2308 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
2309 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2310 reflect->int_field_put(slot_offset, value);
2311 }
2312
2313 int java_lang_reflect_Field::modifiers(oop field) {
2314 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2315 return field->int_field(modifiers_offset);
2316 }
2317
2318 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
2319 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2320 field->int_field_put(modifiers_offset, value);
2321 }
2322
2323 bool java_lang_reflect_Field::has_signature_field() {
2324 return (signature_offset >= 0);
2325 }
2326
2327 oop java_lang_reflect_Field::signature(oop field) {
2328 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2329 assert(has_signature_field(), "signature field must be present");
2330 return field->obj_field(signature_offset);
2331 }
2332
2333 void java_lang_reflect_Field::set_signature(oop field, oop value) {
2334 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2335 assert(has_signature_field(), "signature field must be present");
2336 field->obj_field_put(signature_offset, value);
2337 }
2338
2339 bool java_lang_reflect_Field::has_annotations_field() {
2340 return (annotations_offset >= 0);
2341 }
2342
2343 oop java_lang_reflect_Field::annotations(oop field) {
2344 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2345 assert(has_annotations_field(), "annotations field must be present");
2346 return field->obj_field(annotations_offset);
2347 }
2348
2349 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
2350 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2351 assert(has_annotations_field(), "annotations field must be present");
2352 field->obj_field_put(annotations_offset, value);
2353 }
2354
2355 bool java_lang_reflect_Field::has_type_annotations_field() {
2356 return (type_annotations_offset >= 0);
2357 }
2358
2359 oop java_lang_reflect_Field::type_annotations(oop field) {
2360 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2361 assert(has_type_annotations_field(), "type_annotations field must be present");
2362 return field->obj_field(type_annotations_offset);
2363 }
2364
2365 void java_lang_reflect_Field::set_type_annotations(oop field, oop value) {
2366 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2367 assert(has_type_annotations_field(), "type_annotations field must be present");
2368 field->obj_field_put(type_annotations_offset, value);
2369 }
2370
2371 void sun_reflect_ConstantPool::compute_offsets() {
2372 Klass* k = SystemDictionary::reflect_ConstantPool_klass();
2373 // This null test can be removed post beta
2374 if (k != NULL) {
2375 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
2376 compute_offset(_oop_offset, k, vmSymbols::ConstantPool_name(), vmSymbols::object_signature());
2377 }
2378 }
2379
2380 void java_lang_reflect_Parameter::compute_offsets() {
2381 Klass* k = SystemDictionary::reflect_Parameter_klass();
2382 if(NULL != k) {
2383 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2384 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2385 compute_offset(index_offset, k, vmSymbols::index_name(), vmSymbols::int_signature());
2386 compute_offset(executable_offset, k, vmSymbols::executable_name(), vmSymbols::executable_signature());
2387 }
2388 }
2389
2390 Handle java_lang_reflect_Parameter::create(TRAPS) {
2391 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2392 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
2393 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2394 instanceKlassHandle klass (THREAD, k);
2395 // Ensure it is initialized
2396 klass->initialize(CHECK_NH);
2397 return klass->allocate_instance_handle(CHECK_NH);
2398 }
2399
2400 oop java_lang_reflect_Parameter::name(oop param) {
2401 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2402 return param->obj_field(name_offset);
2403 }
2404
2405 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
2406 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2407 param->obj_field_put(name_offset, value);
2408 }
2409
2410 int java_lang_reflect_Parameter::modifiers(oop param) {
2411 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2412 return param->int_field(modifiers_offset);
2413 }
2414
2415 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
2416 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2417 param->int_field_put(modifiers_offset, value);
2418 }
2419
2420 int java_lang_reflect_Parameter::index(oop param) {
2421 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2422 return param->int_field(index_offset);
2423 }
2424
2425 void java_lang_reflect_Parameter::set_index(oop param, int value) {
2426 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2427 param->int_field_put(index_offset, value);
2428 }
2429
2430 oop java_lang_reflect_Parameter::executable(oop param) {
2431 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2432 return param->obj_field(executable_offset);
2433 }
2434
2435 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
2436 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2437 param->obj_field_put(executable_offset, value);
2438 }
2439
2440
2441 Handle sun_reflect_ConstantPool::create(TRAPS) {
2442 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2443 Klass* k = SystemDictionary::reflect_ConstantPool_klass();
2444 instanceKlassHandle klass (THREAD, k);
2445 // Ensure it is initialized
2446 klass->initialize(CHECK_NH);
2447 return klass->allocate_instance_handle(CHECK_NH);
2448 }
2449
2450
2451 void sun_reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
2452 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2453 oop mirror = value->pool_holder()->java_mirror();
2454 // Save the mirror to get back the constant pool.
2455 reflect->obj_field_put(_oop_offset, mirror);
2456 }
2457
2458 ConstantPool* sun_reflect_ConstantPool::get_cp(oop reflect) {
2459 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2460
2461 oop mirror = reflect->obj_field(_oop_offset);
2462 Klass* k = java_lang_Class::as_Klass(mirror);
2463 assert(k->oop_is_instance(), "Must be");
2464
2465 // Get the constant pool back from the klass. Since class redefinition
2466 // merges the new constant pool into the old, this is essentially the
2467 // same constant pool as the original. If constant pool merging is
2468 // no longer done in the future, this will have to change to save
2469 // the original.
2470 return InstanceKlass::cast(k)->constants();
2471 }
2472
2473 void sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
2474 Klass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass();
2475 // This null test can be removed post beta
2476 if (k != NULL) {
2477 compute_offset(_base_offset, k,
2478 vmSymbols::base_name(), vmSymbols::object_signature());
2479 }
2480 }
2481
2482 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
2483 Klass* k = SystemDictionary::box_klass(type);
2484 if (k == NULL) return NULL;
2485 instanceKlassHandle h (THREAD, k);
2486 if (!h->is_initialized()) h->initialize(CHECK_0);
2487 return h->allocate_instance(THREAD);
2488 }
2489
2490
2491 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
2492 oop box = initialize_and_allocate(type, CHECK_0);
2493 if (box == NULL) return NULL;
2494 switch (type) {
2495 case T_BOOLEAN:
2496 box->bool_field_put(value_offset, value->z);
2497 break;
2498 case T_CHAR:
2499 box->char_field_put(value_offset, value->c);
2500 break;
2501 case T_FLOAT:
2502 box->float_field_put(value_offset, value->f);
2503 break;
2504 case T_DOUBLE:
2505 box->double_field_put(long_value_offset, value->d);
2506 break;
2507 case T_BYTE:
2508 box->byte_field_put(value_offset, value->b);
2509 break;
2510 case T_SHORT:
2511 box->short_field_put(value_offset, value->s);
2512 break;
2513 case T_INT:
2514 box->int_field_put(value_offset, value->i);
2515 break;
2516 case T_LONG:
2517 box->long_field_put(long_value_offset, value->j);
2518 break;
2519 default:
2520 return NULL;
2521 }
2522 return box;
2523 }
2524
2525
2526 BasicType java_lang_boxing_object::basic_type(oop box) {
2527 if (box == NULL) return T_ILLEGAL;
2528 BasicType type = SystemDictionary::box_klass_type(box->klass());
2529 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
2530 return T_ILLEGAL;
2531 return type;
2532 }
2533
2534
2535 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
2536 BasicType type = SystemDictionary::box_klass_type(box->klass());
2537 switch (type) {
2538 case T_BOOLEAN:
2539 value->z = box->bool_field(value_offset);
2540 break;
2541 case T_CHAR:
2542 value->c = box->char_field(value_offset);
2543 break;
2544 case T_FLOAT:
2545 value->f = box->float_field(value_offset);
2546 break;
2547 case T_DOUBLE:
2548 value->d = box->double_field(long_value_offset);
2549 break;
2550 case T_BYTE:
2551 value->b = box->byte_field(value_offset);
2552 break;
2553 case T_SHORT:
2554 value->s = box->short_field(value_offset);
2555 break;
2556 case T_INT:
2557 value->i = box->int_field(value_offset);
2558 break;
2559 case T_LONG:
2560 value->j = box->long_field(long_value_offset);
2561 break;
2562 default:
2563 return T_ILLEGAL;
2564 } // end switch
2565 return type;
2566 }
2567
2568
2569 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
2570 BasicType type = SystemDictionary::box_klass_type(box->klass());
2571 switch (type) {
2572 case T_BOOLEAN:
2573 box->bool_field_put(value_offset, value->z);
2574 break;
2575 case T_CHAR:
2576 box->char_field_put(value_offset, value->c);
2577 break;
2578 case T_FLOAT:
2579 box->float_field_put(value_offset, value->f);
2580 break;
2581 case T_DOUBLE:
2582 box->double_field_put(long_value_offset, value->d);
2583 break;
2584 case T_BYTE:
2585 box->byte_field_put(value_offset, value->b);
2586 break;
2587 case T_SHORT:
2588 box->short_field_put(value_offset, value->s);
2589 break;
2590 case T_INT:
2591 box->int_field_put(value_offset, value->i);
2592 break;
2593 case T_LONG:
2594 box->long_field_put(long_value_offset, value->j);
2595 break;
2596 default:
2597 return T_ILLEGAL;
2598 } // end switch
2599 return type;
2600 }
2601
2602
2603 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
2604 switch (type) {
2605 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
2606 case T_CHAR: st->print("%d", value->c); break;
2607 case T_BYTE: st->print("%d", value->b); break;
2608 case T_SHORT: st->print("%d", value->s); break;
2609 case T_INT: st->print("%d", value->i); break;
2610 case T_LONG: st->print(INT64_FORMAT, value->j); break;
2611 case T_FLOAT: st->print("%f", value->f); break;
2612 case T_DOUBLE: st->print("%lf", value->d); break;
2613 default: st->print("type %d?", type); break;
2614 }
2615 }
2616
2617
2618 // Support for java_lang_ref_Reference
2619 HeapWord *java_lang_ref_Reference::pending_list_lock_addr() {
2620 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2621 address addr = ik->static_field_addr(static_lock_offset);
2622 return (HeapWord*) addr;
2623 }
2624
2625 oop java_lang_ref_Reference::pending_list_lock() {
2626 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2627 address addr = ik->static_field_addr(static_lock_offset);
2628 if (UseCompressedOops) {
2629 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
2630 } else {
2631 return oopDesc::load_decode_heap_oop((oop*)addr);
2632 }
2633 }
2634
2635 HeapWord *java_lang_ref_Reference::pending_list_addr() {
2636 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2637 address addr = ik->static_field_addr(static_pending_offset);
2638 // XXX This might not be HeapWord aligned, almost rather be char *.
2639 return (HeapWord*)addr;
2640 }
2641
2642 oop java_lang_ref_Reference::pending_list() {
2643 char *addr = (char *)pending_list_addr();
2644 if (UseCompressedOops) {
2645 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
2646 } else {
2647 return oopDesc::load_decode_heap_oop((oop*)addr);
2648 }
2649 }
2650
2651
2652 // Support for java_lang_ref_SoftReference
2653
2654 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
2655 return ref->long_field(timestamp_offset);
2656 }
2657
2658 jlong java_lang_ref_SoftReference::clock() {
2659 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass());
2660 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
2661 return *offset;
2662 }
2663
2664 void java_lang_ref_SoftReference::set_clock(jlong value) {
2665 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass());
2666 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
2667 *offset = value;
2668 }
2669
2670 // Support for java_lang_invoke_DirectMethodHandle
2671
2672 int java_lang_invoke_DirectMethodHandle::_member_offset;
2673
2674 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
2675 oop member_name = NULL;
2676 bool is_dmh = dmh->is_oop() && java_lang_invoke_DirectMethodHandle::is_instance(dmh);
2677 assert(is_dmh, "a DirectMethodHandle oop is expected");
2678 if (is_dmh) {
2679 member_name = dmh->obj_field(member_offset_in_bytes());
2680 }
2681 return member_name;
2682 }
2683
2684 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
2685 Klass* klass_oop = SystemDictionary::DirectMethodHandle_klass();
2686 if (klass_oop != NULL) {
2687 compute_offset(_member_offset, klass_oop, vmSymbols::member_name(), vmSymbols::java_lang_invoke_MemberName_signature());
2688 }
2689 }
2690
2691 // Support for java_lang_invoke_MethodHandle
2692
2693 int java_lang_invoke_MethodHandle::_type_offset;
2694 int java_lang_invoke_MethodHandle::_form_offset;
2695
2696 int java_lang_invoke_MemberName::_clazz_offset;
2697 int java_lang_invoke_MemberName::_name_offset;
2698 int java_lang_invoke_MemberName::_type_offset;
2699 int java_lang_invoke_MemberName::_flags_offset;
2700 int java_lang_invoke_MemberName::_vmtarget_offset;
2701 int java_lang_invoke_MemberName::_vmloader_offset;
2702 int java_lang_invoke_MemberName::_vmindex_offset;
2703
2704 int java_lang_invoke_LambdaForm::_vmentry_offset;
2705
2706 void java_lang_invoke_MethodHandle::compute_offsets() {
2707 Klass* klass_oop = SystemDictionary::MethodHandle_klass();
2708 if (klass_oop != NULL) {
2709 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::java_lang_invoke_MethodType_signature());
2710 compute_offset(_form_offset, klass_oop, vmSymbols::form_name(), vmSymbols::java_lang_invoke_LambdaForm_signature());
2711 }
2712 }
2713
2714 void java_lang_invoke_MemberName::compute_offsets() {
2715 Klass* klass_oop = SystemDictionary::MemberName_klass();
2716 if (klass_oop != NULL) {
2717 compute_offset(_clazz_offset, klass_oop, vmSymbols::clazz_name(), vmSymbols::class_signature());
2718 compute_offset(_name_offset, klass_oop, vmSymbols::name_name(), vmSymbols::string_signature());
2719 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::object_signature());
2720 compute_offset(_flags_offset, klass_oop, vmSymbols::flags_name(), vmSymbols::int_signature());
2721 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2722 }
2723 }
2724
2725 void java_lang_invoke_LambdaForm::compute_offsets() {
2726 Klass* klass_oop = SystemDictionary::LambdaForm_klass();
2727 if (klass_oop != NULL) {
2728 compute_offset(_vmentry_offset, klass_oop, vmSymbols::vmentry_name(), vmSymbols::java_lang_invoke_MemberName_signature());
2729 }
2730 }
2731
2732 oop java_lang_invoke_MethodHandle::type(oop mh) {
2733 return mh->obj_field(_type_offset);
2734 }
2735
2736 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
2737 mh->obj_field_put(_type_offset, mtype);
2738 }
2739
2740 oop java_lang_invoke_MethodHandle::form(oop mh) {
2741 assert(_form_offset != 0, "");
2742 return mh->obj_field(_form_offset);
2743 }
2744
2745 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
2746 assert(_form_offset != 0, "");
2747 mh->obj_field_put(_form_offset, lform);
2748 }
2749
2750 /// MemberName accessors
2751
2752 oop java_lang_invoke_MemberName::clazz(oop mname) {
2753 assert(is_instance(mname), "wrong type");
2754 return mname->obj_field(_clazz_offset);
2755 }
2756
2757 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
2758 assert(is_instance(mname), "wrong type");
2759 mname->obj_field_put(_clazz_offset, clazz);
2760 }
2761
2762 oop java_lang_invoke_MemberName::name(oop mname) {
2763 assert(is_instance(mname), "wrong type");
2764 return mname->obj_field(_name_offset);
2765 }
2766
2767 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
2768 assert(is_instance(mname), "wrong type");
2769 mname->obj_field_put(_name_offset, name);
2770 }
2771
2772 oop java_lang_invoke_MemberName::type(oop mname) {
2773 assert(is_instance(mname), "wrong type");
2774 return mname->obj_field(_type_offset);
2775 }
2776
2777 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
2778 assert(is_instance(mname), "wrong type");
2779 mname->obj_field_put(_type_offset, type);
2780 }
2781
2782 int java_lang_invoke_MemberName::flags(oop mname) {
2783 assert(is_instance(mname), "wrong type");
2784 return mname->int_field(_flags_offset);
2785 }
2786
2787 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
2788 assert(is_instance(mname), "wrong type");
2789 mname->int_field_put(_flags_offset, flags);
2790 }
2791
2792 Metadata* java_lang_invoke_MemberName::vmtarget(oop mname) {
2793 assert(is_instance(mname), "wrong type");
2794 return (Metadata*)mname->address_field(_vmtarget_offset);
2795 }
2796
2797 #if INCLUDE_JVMTI
2798 // Can be executed on VM thread only
2799 void java_lang_invoke_MemberName::adjust_vmtarget(oop mname, Metadata* ref) {
2800 assert((is_instance(mname) && (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0), "wrong type");
2801 assert(Thread::current()->is_VM_thread(), "not VM thread");
2802 mname->address_field_put(_vmtarget_offset, (address)ref);
2803 }
2804 #endif // INCLUDE_JVMTI
2805
2806 void java_lang_invoke_MemberName::set_vmtarget(oop mname, Metadata* ref) {
2807 assert(is_instance(mname), "wrong type");
2808 // check the type of the vmtarget
2809 oop dependency = NULL;
2810 if (ref != NULL) {
2811 switch (flags(mname) & (MN_IS_METHOD |
2812 MN_IS_CONSTRUCTOR |
2813 MN_IS_FIELD)) {
2814 case MN_IS_METHOD:
2815 case MN_IS_CONSTRUCTOR:
2816 assert(ref->is_method(), "should be a method");
2817 dependency = ((Method*)ref)->method_holder()->java_mirror();
2818 break;
2819 case MN_IS_FIELD:
2820 assert(ref->is_klass(), "should be a class");
2821 dependency = ((Klass*)ref)->java_mirror();
2822 break;
2823 default:
2824 ShouldNotReachHere();
2825 }
2826 }
2827 mname->address_field_put(_vmtarget_offset, (address)ref);
2828 // Add a reference to the loader (actually mirror because anonymous classes will not have
2829 // distinct loaders) to ensure the metadata is kept alive
2830 // This mirror may be different than the one in clazz field.
2831 mname->obj_field_put(_vmloader_offset, dependency);
2832 }
2833
2834 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
2835 assert(is_instance(mname), "wrong type");
2836 return (intptr_t) mname->address_field(_vmindex_offset);
2837 }
2838
2839 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
2840 assert(is_instance(mname), "wrong type");
2841 mname->address_field_put(_vmindex_offset, (address) index);
2842 }
2843
2844 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
2845 assert(is_instance(lform), "wrong type");
2846 return lform->obj_field(_vmentry_offset);
2847 }
2848
2849
2850 // Support for java_lang_invoke_MethodType
2851
2852 int java_lang_invoke_MethodType::_rtype_offset;
2853 int java_lang_invoke_MethodType::_ptypes_offset;
2854
2855 void java_lang_invoke_MethodType::compute_offsets() {
2856 Klass* k = SystemDictionary::MethodType_klass();
2857 if (k != NULL) {
2858 compute_offset(_rtype_offset, k, vmSymbols::rtype_name(), vmSymbols::class_signature());
2859 compute_offset(_ptypes_offset, k, vmSymbols::ptypes_name(), vmSymbols::class_array_signature());
2860 }
2861 }
2862
2863 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
2864 st->print("(");
2865 objArrayOop pts = ptypes(mt);
2866 for (int i = 0, limit = pts->length(); i < limit; i++) {
2867 java_lang_Class::print_signature(pts->obj_at(i), st);
2868 }
2869 st->print(")");
2870 java_lang_Class::print_signature(rtype(mt), st);
2871 }
2872
2873 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) {
2874 ResourceMark rm;
2875 stringStream buffer(128);
2876 print_signature(mt, &buffer);
2877 const char* sigstr = buffer.base();
2878 int siglen = (int) buffer.size();
2879 Symbol *name;
2880 if (!intern_if_not_found) {
2881 name = SymbolTable::probe(sigstr, siglen);
2882 } else {
2883 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
2884 }
2885 return name;
2886 }
2887
2888 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
2889 if (mt1 == mt2)
2890 return true;
2891 if (rtype(mt1) != rtype(mt2))
2892 return false;
2893 if (ptype_count(mt1) != ptype_count(mt2))
2894 return false;
2895 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
2896 if (ptype(mt1, i) != ptype(mt2, i))
2897 return false;
2898 }
2899 return true;
2900 }
2901
2902 oop java_lang_invoke_MethodType::rtype(oop mt) {
2903 assert(is_instance(mt), "must be a MethodType");
2904 return mt->obj_field(_rtype_offset);
2905 }
2906
2907 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
2908 assert(is_instance(mt), "must be a MethodType");
2909 return (objArrayOop) mt->obj_field(_ptypes_offset);
2910 }
2911
2912 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
2913 return ptypes(mt)->obj_at(idx);
2914 }
2915
2916 int java_lang_invoke_MethodType::ptype_count(oop mt) {
2917 return ptypes(mt)->length();
2918 }
2919
2920 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
2921 objArrayOop pts = ptypes(mt);
2922 int count = pts->length();
2923 int slots = 0;
2924 for (int i = 0; i < count; i++) {
2925 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
2926 slots += type2size[bt];
2927 }
2928 return slots;
2929 }
2930
2931 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
2932 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
2933 return type2size[bt];
2934 }
2935
2936
2937 // Support for java_lang_invoke_CallSite
2938
2939 int java_lang_invoke_CallSite::_target_offset;
2940
2941 void java_lang_invoke_CallSite::compute_offsets() {
2942 Klass* k = SystemDictionary::CallSite_klass();
2943 if (k != NULL) {
2944 compute_offset(_target_offset, k, vmSymbols::target_name(), vmSymbols::java_lang_invoke_MethodHandle_signature());
2945 }
2946 }
2947
2948
2949 // Support for java_security_AccessControlContext
2950
2951 int java_security_AccessControlContext::_context_offset = 0;
2952 int java_security_AccessControlContext::_privilegedContext_offset = 0;
2953 int java_security_AccessControlContext::_isPrivileged_offset = 0;
2954 int java_security_AccessControlContext::_isAuthorized_offset = -1;
2955
2956 void java_security_AccessControlContext::compute_offsets() {
2957 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
2958 fieldDescriptor fd;
2959 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass());
2960
2961 if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) {
2962 fatal("Invalid layout of java.security.AccessControlContext");
2963 }
2964 _context_offset = fd.offset();
2965
2966 if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) {
2967 fatal("Invalid layout of java.security.AccessControlContext");
2968 }
2969 _privilegedContext_offset = fd.offset();
2970
2971 if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) {
2972 fatal("Invalid layout of java.security.AccessControlContext");
2973 }
2974 _isPrivileged_offset = fd.offset();
2975
2976 // The offset may not be present for bootstrapping with older JDK.
2977 if (ik->find_local_field(vmSymbols::isAuthorized_name(), vmSymbols::bool_signature(), &fd)) {
2978 _isAuthorized_offset = fd.offset();
2979 }
2980 }
2981
2982
2983 bool java_security_AccessControlContext::is_authorized(Handle context) {
2984 assert(context.not_null() && context->klass() == SystemDictionary::AccessControlContext_klass(), "Invalid type");
2985 assert(_isAuthorized_offset != -1, "should be set");
2986 return context->bool_field(_isAuthorized_offset) != 0;
2987 }
2988
2989 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
2990 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
2991 // Ensure klass is initialized
2992 InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->initialize(CHECK_0);
2993 // Allocate result
2994 oop result = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->allocate_instance(CHECK_0);
2995 // Fill in values
2996 result->obj_field_put(_context_offset, context());
2997 result->obj_field_put(_privilegedContext_offset, privileged_context());
2998 result->bool_field_put(_isPrivileged_offset, isPrivileged);
2999 // whitelist AccessControlContexts created by the JVM if present
3000 if (_isAuthorized_offset != -1) {
3001 result->bool_field_put(_isAuthorized_offset, true);
3002 }
3003 return result;
3004 }
3005
3006
3007 // Support for java_lang_ClassLoader
3008
3009 bool java_lang_ClassLoader::offsets_computed = false;
3010 int java_lang_ClassLoader::_loader_data_offset = -1;
3011 int java_lang_ClassLoader::parallelCapable_offset = -1;
3012
3013 ClassLoaderData** java_lang_ClassLoader::loader_data_addr(oop loader) {
3014 assert(loader != NULL && loader->is_oop(), "loader must be oop");
3015 return (ClassLoaderData**) loader->address_field_addr(_loader_data_offset);
3016 }
3017
3018 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
3019 return *java_lang_ClassLoader::loader_data_addr(loader);
3020 }
3021
3022 void java_lang_ClassLoader::compute_offsets() {
3023 assert(!offsets_computed, "offsets should be initialized only once");
3024 offsets_computed = true;
3025
3026 // The field indicating parallelCapable (parallelLockMap) is only present starting in 7,
3027 Klass* k1 = SystemDictionary::ClassLoader_klass();
3028 compute_optional_offset(parallelCapable_offset,
3029 k1, vmSymbols::parallelCapable_name(), vmSymbols::concurrenthashmap_signature());
3030
3031 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3032 }
3033
3034 oop java_lang_ClassLoader::parent(oop loader) {
3035 assert(is_instance(loader), "loader must be oop");
3036 return loader->obj_field(parent_offset);
3037 }
3038
3039 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
3040 assert(is_instance(loader), "loader must be oop");
3041 assert(cl == NULL || is_instance(cl), "cl argument must be oop");
3042 oop acl = loader;
3043 debug_only(jint loop_count = 0);
3044 // This loop taken verbatim from ClassLoader.java:
3045 do {
3046 acl = parent(acl);
3047 if (cl == acl) {
3048 return true;
3049 }
3050 assert(++loop_count > 0, "loop_count overflow");
3051 } while (acl != NULL);
3052 return false;
3053 }
3054
3055
3056 // For class loader classes, parallelCapable defined
3057 // based on non-null field
3058 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
3059 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
3060 if (parallelCapable_offset == -1) {
3061 // Default for backward compatibility is false
3062 return false;
3063 }
3064 return (class_loader->obj_field(parallelCapable_offset) != NULL);
3065 }
3066
3067 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
3068 // Fix for 4474172; see evaluation for more details
3069 loader = non_reflection_class_loader(loader);
3070
3071 oop cl = SystemDictionary::java_system_loader();
3072 while(cl != NULL) {
3073 if (cl == loader) return true;
3074 cl = parent(cl);
3075 }
3076 return false;
3077 }
3078
3079 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
3080 if (loader != NULL) {
3081 // See whether this is one of the class loaders associated with
3082 // the generated bytecodes for reflection, and if so, "magically"
3083 // delegate to its parent to prevent class loading from occurring
3084 // in places where applications using reflection didn't expect it.
3085 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass();
3086 // This might be null in non-1.4 JDKs
3087 if (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)) {
3088 return parent(loader);
3089 }
3090 }
3091 return loader;
3092 }
3093
3094
3095 // Support for java_lang_System
3096 int java_lang_System::in_offset_in_bytes() {
3097 return (InstanceMirrorKlass::offset_of_static_fields() + static_in_offset);
3098 }
3099
3100
3101 int java_lang_System::out_offset_in_bytes() {
3102 return (InstanceMirrorKlass::offset_of_static_fields() + static_out_offset);
3103 }
3104
3105
3106 int java_lang_System::err_offset_in_bytes() {
3107 return (InstanceMirrorKlass::offset_of_static_fields() + static_err_offset);
3108 }
3109
3110
3111 bool java_lang_System::has_security_manager() {
3112 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::System_klass());
3113 address addr = ik->static_field_addr(static_security_offset);
3114 if (UseCompressedOops) {
3115 return oopDesc::load_decode_heap_oop((narrowOop *)addr) != NULL;
3116 } else {
3117 return oopDesc::load_decode_heap_oop((oop*)addr) != NULL;
3118 }
3119 }
3120
3121 int java_lang_Class::_klass_offset;
3122 int java_lang_Class::_array_klass_offset;
3123 int java_lang_Class::_oop_size_offset;
3124 int java_lang_Class::_static_oop_field_count_offset;
3125 int java_lang_Class::_class_loader_offset;
3126 int java_lang_Class::_protection_domain_offset;
3127 int java_lang_Class::_component_mirror_offset;
3128 int java_lang_Class::_init_lock_offset;
3129 int java_lang_Class::_signers_offset;
3130 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL;
3131 int java_lang_Throwable::backtrace_offset;
3132 int java_lang_Throwable::detailMessage_offset;
3133 int java_lang_Throwable::cause_offset;
3134 int java_lang_Throwable::stackTrace_offset;
3135 int java_lang_Throwable::static_unassigned_stacktrace_offset;
3136 int java_lang_reflect_AccessibleObject::override_offset;
3137 int java_lang_reflect_Method::clazz_offset;
3138 int java_lang_reflect_Method::name_offset;
3139 int java_lang_reflect_Method::returnType_offset;
3140 int java_lang_reflect_Method::parameterTypes_offset;
3141 int java_lang_reflect_Method::exceptionTypes_offset;
3142 int java_lang_reflect_Method::slot_offset;
3143 int java_lang_reflect_Method::modifiers_offset;
3144 int java_lang_reflect_Method::signature_offset;
3145 int java_lang_reflect_Method::annotations_offset;
3146 int java_lang_reflect_Method::parameter_annotations_offset;
3147 int java_lang_reflect_Method::annotation_default_offset;
3148 int java_lang_reflect_Method::type_annotations_offset;
3149 int java_lang_reflect_Constructor::clazz_offset;
3150 int java_lang_reflect_Constructor::parameterTypes_offset;
3151 int java_lang_reflect_Constructor::exceptionTypes_offset;
3152 int java_lang_reflect_Constructor::slot_offset;
3153 int java_lang_reflect_Constructor::modifiers_offset;
3154 int java_lang_reflect_Constructor::signature_offset;
3155 int java_lang_reflect_Constructor::annotations_offset;
3156 int java_lang_reflect_Constructor::parameter_annotations_offset;
3157 int java_lang_reflect_Constructor::type_annotations_offset;
3158 int java_lang_reflect_Field::clazz_offset;
3159 int java_lang_reflect_Field::name_offset;
3160 int java_lang_reflect_Field::type_offset;
3161 int java_lang_reflect_Field::slot_offset;
3162 int java_lang_reflect_Field::modifiers_offset;
3163 int java_lang_reflect_Field::signature_offset;
3164 int java_lang_reflect_Field::annotations_offset;
3165 int java_lang_reflect_Field::type_annotations_offset;
3166 int java_lang_reflect_Parameter::name_offset;
3167 int java_lang_reflect_Parameter::modifiers_offset;
3168 int java_lang_reflect_Parameter::index_offset;
3169 int java_lang_reflect_Parameter::executable_offset;
3170 int java_lang_boxing_object::value_offset;
3171 int java_lang_boxing_object::long_value_offset;
3172 int java_lang_ref_Reference::referent_offset;
3173 int java_lang_ref_Reference::queue_offset;
3174 int java_lang_ref_Reference::next_offset;
3175 int java_lang_ref_Reference::discovered_offset;
3176 int java_lang_ref_Reference::static_lock_offset;
3177 int java_lang_ref_Reference::static_pending_offset;
3178 int java_lang_ref_Reference::number_of_fake_oop_fields;
3179 int java_lang_ref_SoftReference::timestamp_offset;
3180 int java_lang_ref_SoftReference::static_clock_offset;
3181 int java_lang_ClassLoader::parent_offset;
3182 int java_lang_System::static_in_offset;
3183 int java_lang_System::static_out_offset;
3184 int java_lang_System::static_err_offset;
3185 int java_lang_System::static_security_offset;
3186 int java_lang_StackTraceElement::declaringClass_offset;
3187 int java_lang_StackTraceElement::methodName_offset;
3188 int java_lang_StackTraceElement::fileName_offset;
3189 int java_lang_StackTraceElement::lineNumber_offset;
3190 int java_lang_AssertionStatusDirectives::classes_offset;
3191 int java_lang_AssertionStatusDirectives::classEnabled_offset;
3192 int java_lang_AssertionStatusDirectives::packages_offset;
3193 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
3194 int java_lang_AssertionStatusDirectives::deflt_offset;
3195 int java_nio_Buffer::_limit_offset;
3196 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0;
3197 int sun_reflect_ConstantPool::_oop_offset;
3198 int sun_reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
3199
3200
3201 // Support for java_lang_StackTraceElement
3202
3203 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
3204 element->obj_field_put(fileName_offset, value);
3205 }
3206
3207 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
3208 element->obj_field_put(declaringClass_offset, value);
3209 }
3210
3211 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
3212 element->obj_field_put(methodName_offset, value);
3213 }
3214
3215 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
3216 element->int_field_put(lineNumber_offset, value);
3217 }
3218
3219
3220 // Support for java Assertions - java_lang_AssertionStatusDirectives.
3221
3222 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
3223 o->obj_field_put(classes_offset, val);
3224 }
3225
3226 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
3227 o->obj_field_put(classEnabled_offset, val);
3228 }
3229
3230 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
3231 o->obj_field_put(packages_offset, val);
3232 }
3233
3234 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
3235 o->obj_field_put(packageEnabled_offset, val);
3236 }
3237
3238 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
3239 o->bool_field_put(deflt_offset, val);
3240 }
3241
3242
3243 // Support for intrinsification of java.nio.Buffer.checkIndex
3244 int java_nio_Buffer::limit_offset() {
3245 return _limit_offset;
3246 }
3247
3248
3249 void java_nio_Buffer::compute_offsets() {
3250 Klass* k = SystemDictionary::nio_Buffer_klass();
3251 assert(k != NULL, "must be loaded in 1.4+");
3252 compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature());
3253 }
3254
3255 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) {
3256 if (_owner_offset != 0) return;
3257
3258 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK);
3259 Klass* k = SystemDictionary::abstract_ownable_synchronizer_klass();
3260 compute_offset(_owner_offset, k,
3261 vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature());
3262 }
3263
3264 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
3265 assert(_owner_offset != 0, "Must be initialized");
3266 return obj->obj_field(_owner_offset);
3267 }
3268
3269 // Compute hard-coded offsets
3270 // Invoked before SystemDictionary::initialize, so pre-loaded classes
3271 // are not available to determine the offset_of_static_fields.
3272 void JavaClasses::compute_hard_coded_offsets() {
3273 const int x = heapOopSize;
3274 const int header = instanceOopDesc::base_offset_in_bytes();
3275
3276 // Throwable Class
3277 java_lang_Throwable::backtrace_offset = java_lang_Throwable::hc_backtrace_offset * x + header;
3278 java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header;
3279 java_lang_Throwable::cause_offset = java_lang_Throwable::hc_cause_offset * x + header;
3280 java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header;
3281 java_lang_Throwable::static_unassigned_stacktrace_offset = java_lang_Throwable::hc_static_unassigned_stacktrace_offset * x;
3282
3283 // java_lang_boxing_object
3284 java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header;
3285 java_lang_boxing_object::long_value_offset = align_size_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong);
3286
3287 // java_lang_ref_Reference:
3288 java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header;
3289 java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header;
3290 java_lang_ref_Reference::next_offset = java_lang_ref_Reference::hc_next_offset * x + header;
3291 java_lang_ref_Reference::discovered_offset = java_lang_ref_Reference::hc_discovered_offset * x + header;
3292 java_lang_ref_Reference::static_lock_offset = java_lang_ref_Reference::hc_static_lock_offset * x;
3293 java_lang_ref_Reference::static_pending_offset = java_lang_ref_Reference::hc_static_pending_offset * x;
3294 // Artificial fields for java_lang_ref_Reference
3295 // The first field is for the discovered field added in 1.4
3296 java_lang_ref_Reference::number_of_fake_oop_fields = 1;
3297
3298 // java_lang_ref_SoftReference Class
3299 java_lang_ref_SoftReference::timestamp_offset = align_size_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong);
3300 // Don't multiply static fields because they are always in wordSize units
3301 java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x;
3302
3303 // java_lang_ClassLoader
3304 java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header;
3305
3306 // java_lang_System
3307 java_lang_System::static_in_offset = java_lang_System::hc_static_in_offset * x;
3308 java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x;
3309 java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x;
3310 java_lang_System::static_security_offset = java_lang_System::hc_static_security_offset * x;
3311
3312 // java_lang_StackTraceElement
3313 java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset * x + header;
3314 java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header;
3315 java_lang_StackTraceElement::fileName_offset = java_lang_StackTraceElement::hc_fileName_offset * x + header;
3316 java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header;
3317 java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header;
3318 java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header;
3319 java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header;
3320 java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header;
3321 java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header;
3322
3323 }
3324
3325
3326 // Compute non-hard-coded field offsets of all the classes in this file
3327 void JavaClasses::compute_offsets() {
3328 // java_lang_Class::compute_offsets was called earlier in bootstrap
3329 java_lang_ClassLoader::compute_offsets();
3330 java_lang_Thread::compute_offsets();
3331 java_lang_ThreadGroup::compute_offsets();
3332 java_lang_invoke_MethodHandle::compute_offsets();
3333 java_lang_invoke_DirectMethodHandle::compute_offsets();
3334 java_lang_invoke_MemberName::compute_offsets();
3335 java_lang_invoke_LambdaForm::compute_offsets();
3336 java_lang_invoke_MethodType::compute_offsets();
3337 java_lang_invoke_CallSite::compute_offsets();
3338 java_security_AccessControlContext::compute_offsets();
3339 // Initialize reflection classes. The layouts of these classes
3340 // changed with the new reflection implementation in JDK 1.4, and
3341 // since the Universe doesn't know what JDK version it is until this
3342 // point we defer computation of these offsets until now.
3343 java_lang_reflect_AccessibleObject::compute_offsets();
3344 java_lang_reflect_Method::compute_offsets();
3345 java_lang_reflect_Constructor::compute_offsets();
3346 java_lang_reflect_Field::compute_offsets();
3347 java_nio_Buffer::compute_offsets();
3348 sun_reflect_ConstantPool::compute_offsets();
3349 sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets();
3350 java_lang_reflect_Parameter::compute_offsets();
3351
3352 // generated interpreter code wants to know about the offsets we just computed:
3353 AbstractAssembler::update_delayed_values();
3354 }
3355
3356 #ifndef PRODUCT
3357
3358 // These functions exist to assert the validity of hard-coded field offsets to guard
3359 // against changes in the class files
3360
3361 bool JavaClasses::check_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("Nonstatic field %s.%s not found", klass_name, field_name);
3371 return false;
3372 }
3373 if (fd.is_static()) {
3374 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
3375 return false;
3376 }
3377 if (fd.offset() == hardcoded_offset ) {
3378 return true;
3379 } else {
3380 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
3381 klass_name, field_name, hardcoded_offset, fd.offset());
3382 return false;
3383 }
3384 }
3385
3386
3387 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
3388 EXCEPTION_MARK;
3389 fieldDescriptor fd;
3390 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3391 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3392 instanceKlassHandle h_klass (THREAD, k);
3393 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3394 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3395 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3396 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3397 return false;
3398 }
3399 if (!fd.is_static()) {
3400 tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name);
3401 return false;
3402 }
3403 if (fd.offset() == hardcoded_offset + InstanceMirrorKlass::offset_of_static_fields()) {
3404 return true;
3405 } else {
3406 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());
3407 return false;
3408 }
3409 }
3410
3411
3412 bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) {
3413 EXCEPTION_MARK;
3414 fieldDescriptor fd;
3415 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3416 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3417 instanceKlassHandle h_klass (THREAD, k);
3418 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3419 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3420 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3421 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3422 return false;
3423 }
3424 if (!fd.is_static() || !fd.has_initial_value()) {
3425 tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name);
3426 return false;
3427 }
3428 if (!fd.initial_value_tag().is_int()) {
3429 tty->print_cr("Static field %s.%s is not an int", klass_name, field_name);
3430 return false;
3431 }
3432 jint field_value = fd.int_initial_value();
3433 if (field_value == hardcoded_constant) {
3434 return true;
3435 } else {
3436 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);
3437 return false;
3438 }
3439 }
3440
3441
3442 // Check the hard-coded field offsets of all the classes in this file
3443
3444 void JavaClasses::check_offsets() {
3445 bool valid = true;
3446 HandleMark hm;
3447
3448 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3449 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
3450
3451 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3452 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
3453
3454 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3455 valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig)
3456
3457 #define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \
3458 valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig)
3459
3460 // java.lang.String
3461
3462 CHECK_OFFSET("java/lang/String", java_lang_String, value, "[C");
3463 if (java_lang_String::has_offset_field()) {
3464 CHECK_OFFSET("java/lang/String", java_lang_String, offset, "I");
3465 CHECK_OFFSET("java/lang/String", java_lang_String, count, "I");
3466 }
3467 if (java_lang_String::has_hash_field()) {
3468 CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I");
3469 }
3470
3471 // java.lang.Class
3472
3473 // Fake fields
3474 // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked
3475 // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked
3476
3477 // java.lang.Throwable
3478
3479 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;");
3480 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;");
3481 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, cause, "Ljava/lang/Throwable;");
3482 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;");
3483
3484 // Boxed primitive objects (java_lang_boxing_object)
3485
3486 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
3487 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
3488 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
3489 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
3490 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
3491 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
3492 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
3493 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
3494
3495 // java.lang.ClassLoader
3496
3497 CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent, "Ljava/lang/ClassLoader;");
3498
3499 // java.lang.System
3500
3501 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, in, "Ljava/io/InputStream;");
3502 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;");
3503 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;");
3504 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, security, "Ljava/lang/SecurityManager;");
3505
3506 // java.lang.StackTraceElement
3507
3508 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;");
3509 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;");
3510 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, fileName, "Ljava/lang/String;");
3511 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I");
3512
3513 // java.lang.ref.Reference
3514
3515 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
3516 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
3517 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
3518 // Fake field
3519 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
3520 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, lock, "Ljava/lang/ref/Reference$Lock;");
3521 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, pending, "Ljava/lang/ref/Reference;");
3522
3523 // java.lang.ref.SoftReference
3524
3525 CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J");
3526 CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J");
3527
3528 // java.lang.AssertionStatusDirectives
3529 //
3530 // The CheckAssertionStatusDirectives boolean can be removed from here and
3531 // globals.hpp after the AssertionStatusDirectives class has been integrated
3532 // into merlin "for some time." Without it, the vm will fail with early
3533 // merlin builds.
3534
3535 if (CheckAssertionStatusDirectives) {
3536 const char* nm = "java/lang/AssertionStatusDirectives";
3537 const char* sig = "[Ljava/lang/String;";
3538 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig);
3539 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z");
3540 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig);
3541 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z");
3542 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z");
3543 }
3544
3545 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
3546 }
3547
3548 #endif // PRODUCT
3549
3550 int InjectedField::compute_offset() {
3551 Klass* klass_oop = klass();
3552 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
3553 if (!may_be_java && !fs.access_flags().is_internal()) {
3554 // Only look at injected fields
3555 continue;
3556 }
3557 if (fs.name() == name() && fs.signature() == signature()) {
3558 return fs.offset();
3559 }
3560 }
3561 ResourceMark rm;
3562 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)" : "");
3563 #ifndef PRODUCT
3564 klass_oop->print();
3565 tty->print_cr("all fields:");
3566 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
3567 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
3568 }
3569 #endif //PRODUCT
3570 fatal("Invalid layout of preloaded class");
3571 return -1;
3572 }
3573
3574 void javaClasses_init() {
3575 JavaClasses::compute_offsets();
3576 JavaClasses::check_offsets();
3577 FilteredFieldsMap::initialize(); // must be done after computing offsets.
3578 }