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/symbol.hpp"
43 #include "oops/typeArrayOop.hpp"
44 #include "runtime/fieldDescriptor.hpp"
45 #include "runtime/handles.inline.hpp"
46 #include "runtime/interfaceSupport.hpp"
47 #include "runtime/java.hpp"
48 #include "runtime/javaCalls.hpp"
49 #include "runtime/safepoint.hpp"
50 #include "runtime/thread.inline.hpp"
51 #include "runtime/vframe.hpp"
52 #include "utilities/preserveException.hpp"
53
54 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
55
56 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \
57 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum);
58
59 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \
60 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java },
61
62 InjectedField JavaClasses::_injected_fields[] = {
63 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
64 };
65
66 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
67 return _injected_fields[id].compute_offset();
68 }
69
70
71 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
72 *field_count = 0;
73
74 vmSymbols::SID sid = vmSymbols::find_sid(class_name);
75 if (sid == vmSymbols::NO_SID) {
76 // Only well known classes can inject fields
77 return NULL;
78 }
79
80 int count = 0;
81 int start = -1;
82
83 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
84 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \
85 count++; \
86 if (start == -1) start = klass##_##name##_enum; \
87 }
88 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
89 #undef LOOKUP_INJECTED_FIELD
90
91 if (start != -1) {
92 *field_count = count;
93 return _injected_fields + start;
94 }
95 return NULL;
96 }
97
98
99 static bool find_field(InstanceKlass* ik,
100 Symbol* name_symbol, Symbol* signature_symbol,
101 fieldDescriptor* fd,
102 bool allow_super = false) {
103 if (allow_super)
104 return ik->find_field(name_symbol, signature_symbol, fd) != NULL;
105 else
106 return ik->find_local_field(name_symbol, signature_symbol, fd);
107 }
108
109 // Helpful routine for computing field offsets at run time rather than hardcoding them
110 static void
111 compute_offset(int &dest_offset,
112 Klass* klass_oop, Symbol* name_symbol, Symbol* signature_symbol,
113 bool allow_super = false) {
114 fieldDescriptor fd;
115 InstanceKlass* ik = InstanceKlass::cast(klass_oop);
116 if (!find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) {
117 ResourceMark rm;
118 tty->print_cr("Invalid layout of %s at %s sig %s", ik->external_name(), name_symbol->as_C_string(), signature_symbol->as_C_string());
119 #ifndef PRODUCT
120 klass_oop->print();
121 tty->print_cr("all fields:");
122 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
123 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
124 }
125 #endif //PRODUCT
126 fatal("Invalid layout of preloaded class");
127 }
128 dest_offset = fd.offset();
129 }
130
131 // Same as above but for "optional" offsets that might not be present in certain JDK versions
132 static void
133 compute_optional_offset(int& dest_offset,
134 Klass* klass_oop, Symbol* name_symbol, Symbol* signature_symbol,
135 bool allow_super = false) {
136 fieldDescriptor fd;
137 InstanceKlass* ik = InstanceKlass::cast(klass_oop);
138 if (find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) {
139 dest_offset = fd.offset();
140 }
141 }
142
143
144 int java_lang_String::value_offset = 0;
145 int java_lang_String::offset_offset = 0;
146 int java_lang_String::count_offset = 0;
147 int java_lang_String::hash_offset = 0;
148
149 bool java_lang_String::initialized = false;
150
151 void java_lang_String::compute_offsets() {
152 assert(!initialized, "offsets should be initialized only once");
153
154 Klass* k = SystemDictionary::String_klass();
155 compute_offset(value_offset, k, vmSymbols::value_name(), vmSymbols::char_array_signature());
156 compute_optional_offset(offset_offset, k, vmSymbols::offset_name(), vmSymbols::int_signature());
157 compute_optional_offset(count_offset, k, vmSymbols::count_name(), vmSymbols::int_signature());
158 compute_optional_offset(hash_offset, k, vmSymbols::hash_name(), vmSymbols::int_signature());
159
160 initialized = true;
161 }
162
163 Handle java_lang_String::basic_create(int length, TRAPS) {
164 assert(initialized, "Must be initialized");
165 // Create the String object first, so there's a chance that the String
166 // and the char array it points to end up in the same cache line.
167 oop obj;
168 obj = InstanceKlass::cast(SystemDictionary::String_klass())->allocate_instance(CHECK_NH);
169
170 // Create the char array. The String object must be handlized here
171 // because GC can happen as a result of the allocation attempt.
172 Handle h_obj(THREAD, obj);
173 typeArrayOop buffer;
174 buffer = oopFactory::new_charArray(length, CHECK_NH);
175
176 // Point the String at the char array
177 obj = h_obj();
178 set_value(obj, buffer);
179 // No need to zero the offset, allocation zero'ed the entire String object
180 assert(offset(obj) == 0, "initial String offset should be zero");
181 //set_offset(obj, 0);
182 set_count(obj, length);
183
184 return h_obj;
185 }
186
187 Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) {
188 Handle h_obj = basic_create(length, CHECK_NH);
189 typeArrayOop buffer = value(h_obj());
190 for (int index = 0; index < length; index++) {
191 buffer->char_at_put(index, unicode[index]);
192 }
193 return h_obj;
194 }
195
196 oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) {
197 Handle h_obj = create_from_unicode(unicode, length, CHECK_0);
198 return h_obj();
199 }
200
201 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
202 if (utf8_str == NULL) {
203 return Handle();
204 }
205 int length = UTF8::unicode_length(utf8_str);
206 Handle h_obj = basic_create(length, CHECK_NH);
207 if (length > 0) {
208 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
209 }
210 return h_obj;
211 }
212
213 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
214 Handle h_obj = create_from_str(utf8_str, CHECK_0);
215 return h_obj();
216 }
217
218 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) {
219 int length = UTF8::unicode_length((char*)symbol->bytes(), symbol->utf8_length());
220 Handle h_obj = basic_create(length, CHECK_NH);
221 if (length > 0) {
222 UTF8::convert_to_unicode((char*)symbol->bytes(), value(h_obj())->char_at_addr(0), length);
223 }
224 return h_obj;
225 }
226
227 // Converts a C string to a Java String based on current encoding
228 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
229 assert(str != NULL, "bad arguments");
230
231 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *);
232 static to_java_string_fn_t _to_java_string_fn = NULL;
233
234 if (_to_java_string_fn == NULL) {
235 void *lib_handle = os::native_java_library();
236 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform"));
237 if (_to_java_string_fn == NULL) {
238 fatal("NewStringPlatform missing");
239 }
240 }
241
242 jstring js = NULL;
243 { JavaThread* thread = (JavaThread*)THREAD;
244 assert(thread->is_Java_thread(), "must be java thread");
245 HandleMark hm(thread);
246 ThreadToNativeFromVM ttn(thread);
247 js = (_to_java_string_fn)(thread->jni_environment(), str);
248 }
249 return Handle(THREAD, JNIHandles::resolve(js));
250 }
251
252 // Converts a Java String to a native C string that can be used for
253 // native OS calls.
254 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
255
256 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
257 static to_platform_string_fn_t _to_platform_string_fn = NULL;
258
259 if (_to_platform_string_fn == NULL) {
260 void *lib_handle = os::native_java_library();
261 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
262 if (_to_platform_string_fn == NULL) {
263 fatal("GetStringPlatformChars missing");
264 }
265 }
266
267 char *native_platform_string;
268 { JavaThread* thread = (JavaThread*)THREAD;
269 assert(thread->is_Java_thread(), "must be java thread");
270 JNIEnv *env = thread->jni_environment();
271 jstring js = (jstring) JNIHandles::make_local(env, java_string());
272 bool is_copy;
273 HandleMark hm(thread);
274 ThreadToNativeFromVM ttn(thread);
275 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
276 assert(is_copy == JNI_TRUE, "is_copy value changed");
277 JNIHandles::destroy_local(js);
278 }
279 return native_platform_string;
280 }
281
282 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) {
283 oop obj = java_string();
284 // Typical usage is to convert all '/' to '.' in string.
285 typeArrayOop value = java_lang_String::value(obj);
286 int offset = java_lang_String::offset(obj);
287 int length = java_lang_String::length(obj);
288
289 // First check if any from_char exist
290 int index; // Declared outside, used later
291 for (index = 0; index < length; index++) {
292 if (value->char_at(index + offset) == from_char) {
293 break;
294 }
295 }
296 if (index == length) {
297 // No from_char, so do not copy.
298 return java_string;
299 }
300
301 // Create new UNICODE buffer. Must handlize value because GC
302 // may happen during String and char array creation.
303 typeArrayHandle h_value(THREAD, value);
304 Handle string = basic_create(length, CHECK_NH);
305
306 typeArrayOop from_buffer = h_value();
307 typeArrayOop to_buffer = java_lang_String::value(string());
308
309 // Copy contents
310 for (index = 0; index < length; index++) {
311 jchar c = from_buffer->char_at(index + offset);
312 if (c == from_char) {
313 c = to_char;
314 }
315 to_buffer->char_at_put(index, c);
316 }
317 return string;
318 }
319
320 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
321 typeArrayOop value = java_lang_String::value(java_string);
322 int offset = java_lang_String::offset(java_string);
323 length = java_lang_String::length(java_string);
324
325 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
326 if (result != NULL) {
327 for (int index = 0; index < length; index++) {
328 result[index] = value->char_at(index + offset);
329 }
330 } else {
331 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
332 }
333 return result;
334 }
335
336 unsigned int java_lang_String::hash_code(oop java_string) {
337 int length = java_lang_String::length(java_string);
338 // Zero length string will hash to zero with String.hashCode() function.
339 if (length == 0) return 0;
340
341 typeArrayOop value = java_lang_String::value(java_string);
342 int offset = java_lang_String::offset(java_string);
343 return java_lang_String::hash_code(value->char_at_addr(offset), length);
344 }
345
346 char* java_lang_String::as_quoted_ascii(oop java_string) {
347 typeArrayOop value = java_lang_String::value(java_string);
348 int offset = java_lang_String::offset(java_string);
349 int length = java_lang_String::length(java_string);
350
351 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
352 if (base == NULL) return NULL;
353
354 int result_length = UNICODE::quoted_ascii_length(base, length) + 1;
355 char* result = NEW_RESOURCE_ARRAY(char, result_length);
356 UNICODE::as_quoted_ascii(base, length, result, result_length);
357 assert(result_length >= length + 1, "must not be shorter");
358 assert(result_length == (int)strlen(result) + 1, "must match");
359 return result;
360 }
361
362 unsigned int java_lang_String::hash_string(oop java_string) {
363 int length = java_lang_String::length(java_string);
364 // Zero length string doesn't hash necessarily hash to zero.
365 if (length == 0) {
366 return StringTable::hash_string(NULL, 0);
367 }
368
369 typeArrayOop value = java_lang_String::value(java_string);
370 int offset = java_lang_String::offset(java_string);
371 return StringTable::hash_string(value->char_at_addr(offset), length);
372 }
373
374 Symbol* java_lang_String::as_symbol(Handle java_string, TRAPS) {
375 oop obj = java_string();
376 typeArrayOop value = java_lang_String::value(obj);
377 int offset = java_lang_String::offset(obj);
378 int length = java_lang_String::length(obj);
379 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
380 Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD);
381 return sym;
382 }
383
384 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
385 typeArrayOop value = java_lang_String::value(java_string);
386 int offset = java_lang_String::offset(java_string);
387 int length = java_lang_String::length(java_string);
388 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
389 return SymbolTable::probe_unicode(base, length);
390 }
391
392
393 int java_lang_String::utf8_length(oop java_string) {
394 typeArrayOop value = java_lang_String::value(java_string);
395 int offset = java_lang_String::offset(java_string);
396 int length = java_lang_String::length(java_string);
397 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
398 return UNICODE::utf8_length(position, length);
399 }
400
401 char* java_lang_String::as_utf8_string(oop java_string) {
402 typeArrayOop value = java_lang_String::value(java_string);
403 int offset = java_lang_String::offset(java_string);
404 int length = java_lang_String::length(java_string);
405 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
406 return UNICODE::as_utf8(position, length);
407 }
408
409 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) {
410 typeArrayOop value = java_lang_String::value(java_string);
411 int offset = java_lang_String::offset(java_string);
412 int length = java_lang_String::length(java_string);
413 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
414 return UNICODE::as_utf8(position, length, buf, buflen);
415 }
416
417 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
418 typeArrayOop value = java_lang_String::value(java_string);
419 int offset = java_lang_String::offset(java_string);
420 int length = java_lang_String::length(java_string);
421 assert(start + len <= length, "just checking");
422 jchar* position = value->char_at_addr(offset + start);
423 return UNICODE::as_utf8(position, len);
424 }
425
426 char* java_lang_String::as_utf8_string(oop java_string, int start, int len, char* buf, int buflen) {
427 typeArrayOop value = java_lang_String::value(java_string);
428 int offset = java_lang_String::offset(java_string);
429 int length = java_lang_String::length(java_string);
430 assert(start + len <= length, "just checking");
431 jchar* position = value->char_at_addr(offset + start);
432 return UNICODE::as_utf8(position, len, buf, buflen);
433 }
434
435 bool java_lang_String::equals(oop java_string, jchar* chars, int len) {
436 assert(java_string->klass() == SystemDictionary::String_klass(),
437 "must be java_string");
438 typeArrayOop value = java_lang_String::value(java_string);
439 int offset = java_lang_String::offset(java_string);
440 int length = java_lang_String::length(java_string);
441 if (length != len) {
442 return false;
443 }
444 for (int i = 0; i < len; i++) {
445 if (value->char_at(i + offset) != chars[i]) {
446 return false;
447 }
448 }
449 return true;
450 }
451
452 bool java_lang_String::equals(oop str1, oop str2) {
453 assert(str1->klass() == SystemDictionary::String_klass(),
454 "must be java String");
455 assert(str2->klass() == SystemDictionary::String_klass(),
456 "must be java String");
457 typeArrayOop value1 = java_lang_String::value(str1);
458 int offset1 = java_lang_String::offset(str1);
459 int length1 = java_lang_String::length(str1);
460 typeArrayOop value2 = java_lang_String::value(str2);
461 int offset2 = java_lang_String::offset(str2);
462 int length2 = java_lang_String::length(str2);
463
464 if (length1 != length2) {
465 return false;
466 }
467 for (int i = 0; i < length1; i++) {
468 if (value1->char_at(i + offset1) != value2->char_at(i + offset2)) {
469 return false;
470 }
471 }
472 return true;
473 }
474
475 void java_lang_String::print(oop java_string, outputStream* st) {
476 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string");
477 typeArrayOop value = java_lang_String::value(java_string);
478
479 if (value == NULL) {
480 // This can happen if, e.g., printing a String
481 // object before its initializer has been called
482 st->print("NULL");
483 return;
484 }
485
486 int offset = java_lang_String::offset(java_string);
487 int length = java_lang_String::length(java_string);
488
489 st->print("\"");
490 for (int index = 0; index < length; index++) {
491 st->print("%c", value->char_at(index + offset));
492 }
493 st->print("\"");
494 }
495
496
497 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
498 assert(mirror.not_null() && fd->is_static(), "just checking");
499 if (fd->has_initial_value()) {
500 BasicType t = fd->field_type();
501 switch (t) {
502 case T_BYTE:
503 mirror()->byte_field_put(fd->offset(), fd->int_initial_value());
504 break;
505 case T_BOOLEAN:
506 mirror()->bool_field_put(fd->offset(), fd->int_initial_value());
507 break;
508 case T_CHAR:
509 mirror()->char_field_put(fd->offset(), fd->int_initial_value());
510 break;
511 case T_SHORT:
512 mirror()->short_field_put(fd->offset(), fd->int_initial_value());
513 break;
514 case T_INT:
515 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
516 break;
517 case T_FLOAT:
518 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
519 break;
520 case T_DOUBLE:
521 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
522 break;
523 case T_LONG:
524 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
525 break;
526 case T_OBJECT:
527 {
528 #ifdef ASSERT
529 TempNewSymbol sym = SymbolTable::new_symbol("Ljava/lang/String;", CHECK);
530 assert(fd->signature() == sym, "just checking");
531 #endif
532 oop string = fd->string_initial_value(CHECK);
533 mirror()->obj_field_put(fd->offset(), string);
534 }
535 break;
536 default:
537 THROW_MSG(vmSymbols::java_lang_ClassFormatError(),
538 "Illegal ConstantValue attribute in class file");
539 }
540 }
541 }
542
543
544 void java_lang_Class::fixup_mirror(KlassHandle k, TRAPS) {
545 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
546
547 // If the offset was read from the shared archive, it was fixed up already
548 if (!k->is_shared()) {
549 if (k->oop_is_instance()) {
550 // During bootstrap, java.lang.Class wasn't loaded so static field
551 // offsets were computed without the size added it. Go back and
552 // update all the static field offsets to included the size.
553 for (JavaFieldStream fs(InstanceKlass::cast(k())); !fs.done(); fs.next()) {
554 if (fs.access_flags().is_static()) {
555 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields();
556 fs.set_offset(real_offset);
557 }
558 }
559 }
560 }
561 create_mirror(k, Handle(NULL), Handle(NULL), CHECK);
562 }
563
564 void java_lang_Class::initialize_mirror_fields(KlassHandle k,
565 Handle mirror,
566 Handle protection_domain,
567 TRAPS) {
568 // Allocate a simple java object for a lock.
569 // This needs to be a java object because during class initialization
570 // it can be held across a java call.
571 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
572 set_init_lock(mirror(), r);
573
574 // Set protection domain also
575 set_protection_domain(mirror(), protection_domain());
576
577 // Initialize static fields
578 InstanceKlass::cast(k())->do_local_static_fields(&initialize_static_field, mirror, CHECK);
579 }
580
581 void java_lang_Class::create_mirror(KlassHandle k, Handle class_loader,
582 Handle protection_domain, TRAPS) {
583 assert(k->java_mirror() == NULL, "should only assign mirror once");
584 // Use this moment of initialization to cache modifier_flags also,
585 // to support Class.getModifiers(). Instance classes recalculate
586 // the cached flags after the class file is parsed, but before the
587 // class is put into the system dictionary.
588 int computed_modifiers = k->compute_modifier_flags(CHECK);
589 k->set_modifier_flags(computed_modifiers);
590 // Class_klass has to be loaded because it is used to allocate
591 // the mirror.
592 if (SystemDictionary::Class_klass_loaded()) {
593 // Allocate mirror (java.lang.Class instance)
594 Handle mirror = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK);
595
596 // Setup indirection from mirror->klass
597 if (!k.is_null()) {
598 java_lang_Class::set_klass(mirror(), k());
599 }
600
601 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
602 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
603
604 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
605
606 // It might also have a component mirror. This mirror must already exist.
607 if (k->oop_is_array()) {
608 Handle comp_mirror;
609 if (k->oop_is_typeArray()) {
610 BasicType type = TypeArrayKlass::cast(k())->element_type();
611 comp_mirror = Universe::java_mirror(type);
612 } else {
613 assert(k->oop_is_objArray(), "Must be");
614 Klass* element_klass = ObjArrayKlass::cast(k())->element_klass();
615 assert(element_klass != NULL, "Must have an element klass");
616 comp_mirror = element_klass->java_mirror();
617 }
618 assert(comp_mirror.not_null(), "must have a mirror");
619
620 // Two-way link between the array klass and its component mirror:
621 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
622 set_component_mirror(mirror(), comp_mirror());
623 set_array_klass(comp_mirror(), k());
624 } else {
625 assert(k->oop_is_instance(), "Must be");
626
627 initialize_mirror_fields(k, mirror, protection_domain, THREAD);
628 if (HAS_PENDING_EXCEPTION) {
629 // If any of the fields throws an exception like OOM remove the klass field
630 // from the mirror so GC doesn't follow it after the klass has been deallocated.
631 // This mirror looks like a primitive type, which logically it is because it
632 // it represents no class.
633 java_lang_Class::set_klass(mirror(), NULL);
634 return;
635 }
636 }
637
638 // set the classLoader field in the java_lang_Class instance
639 assert(class_loader() == k->class_loader(), "should be same");
640 set_class_loader(mirror(), class_loader());
641
642 // Setup indirection from klass->mirror last
643 // after any exceptions can happen during allocations.
644 if (!k.is_null()) {
645 k->set_java_mirror(mirror());
646 }
647 } else {
648 if (fixup_mirror_list() == NULL) {
649 GrowableArray<Klass*>* list =
650 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true);
651 set_fixup_mirror_list(list);
652 }
653 fixup_mirror_list()->push(k());
654 }
655 }
656
657
658 int java_lang_Class::oop_size(oop java_class) {
659 assert(_oop_size_offset != 0, "must be set");
660 return java_class->int_field(_oop_size_offset);
661 }
662 void java_lang_Class::set_oop_size(oop java_class, int size) {
663 assert(_oop_size_offset != 0, "must be set");
664 java_class->int_field_put(_oop_size_offset, size);
665 }
666 int java_lang_Class::static_oop_field_count(oop java_class) {
667 assert(_static_oop_field_count_offset != 0, "must be set");
668 return java_class->int_field(_static_oop_field_count_offset);
669 }
670 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
671 assert(_static_oop_field_count_offset != 0, "must be set");
672 java_class->int_field_put(_static_oop_field_count_offset, size);
673 }
674
675 oop java_lang_Class::protection_domain(oop java_class) {
676 assert(_protection_domain_offset != 0, "must be set");
677 return java_class->obj_field(_protection_domain_offset);
678 }
679 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
680 assert(_protection_domain_offset != 0, "must be set");
681 java_class->obj_field_put(_protection_domain_offset, pd);
682 }
683
684 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
685 assert(_component_mirror_offset != 0, "must be set");
686 java_class->obj_field_put(_component_mirror_offset, comp_mirror);
687 }
688 oop java_lang_Class::component_mirror(oop java_class) {
689 assert(_component_mirror_offset != 0, "must be set");
690 return java_class->obj_field(_component_mirror_offset);
691 }
692
693 oop java_lang_Class::init_lock(oop java_class) {
694 assert(_init_lock_offset != 0, "must be set");
695 return java_class->obj_field(_init_lock_offset);
696 }
697 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
698 assert(_init_lock_offset != 0, "must be set");
699 java_class->obj_field_put(_init_lock_offset, init_lock);
700 }
701
702 objArrayOop java_lang_Class::signers(oop java_class) {
703 assert(_signers_offset != 0, "must be set");
704 return (objArrayOop)java_class->obj_field(_signers_offset);
705 }
706 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) {
707 assert(_signers_offset != 0, "must be set");
708 java_class->obj_field_put(_signers_offset, (oop)signers);
709 }
710
711
712 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
713 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet.
714 if (_class_loader_offset != 0) {
715 java_class->obj_field_put(_class_loader_offset, loader);
716 }
717 }
718
719 oop java_lang_Class::class_loader(oop java_class) {
720 assert(_class_loader_offset != 0, "must be set");
721 return java_class->obj_field(_class_loader_offset);
722 }
723
724 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
725 // This should be improved by adding a field at the Java level or by
726 // introducing a new VM klass (see comment in ClassFileParser)
727 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0);
728 if (type != T_VOID) {
729 Klass* aklass = Universe::typeArrayKlassObj(type);
730 assert(aklass != NULL, "correct bootstrap");
731 set_array_klass(java_class, aklass);
732 }
733 #ifdef ASSERT
734 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass());
735 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
736 #endif
737 return java_class;
738 }
739
740
741 Klass* java_lang_Class::as_Klass(oop java_class) {
742 //%note memory_2
743 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
744 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset));
745 assert(k == NULL || k->is_klass(), "type check");
746 return k;
747 }
748
749
750 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
751 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
752 java_class->metadata_field_put(_klass_offset, klass);
753 }
754
755
756 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
757 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
758 Symbol* name = NULL;
759 bool is_instance = false;
760 if (is_primitive(java_class)) {
761 name = vmSymbols::type_signature(primitive_type(java_class));
762 } else {
763 Klass* k = as_Klass(java_class);
764 is_instance = k->oop_is_instance();
765 name = k->name();
766 }
767 if (name == NULL) {
768 st->print("<null>");
769 return;
770 }
771 if (is_instance) st->print("L");
772 st->write((char*) name->base(), (int) name->utf8_length());
773 if (is_instance) st->print(";");
774 }
775
776 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) {
777 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
778 Symbol* name;
779 if (is_primitive(java_class)) {
780 name = vmSymbols::type_signature(primitive_type(java_class));
781 // Because this can create a new symbol, the caller has to decrement
782 // the refcount, so make adjustment here and below for symbols returned
783 // that are not created or incremented due to a successful lookup.
784 name->increment_refcount();
785 } else {
786 Klass* k = as_Klass(java_class);
787 if (!k->oop_is_instance()) {
788 name = k->name();
789 name->increment_refcount();
790 } else {
791 ResourceMark rm;
792 const char* sigstr = k->signature_name();
793 int siglen = (int) strlen(sigstr);
794 if (!intern_if_not_found) {
795 name = SymbolTable::probe(sigstr, siglen);
796 } else {
797 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
798 }
799 }
800 }
801 return name;
802 }
803
804
805 Klass* java_lang_Class::array_klass(oop java_class) {
806 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
807 assert(k == NULL || k->is_klass() && k->oop_is_array(), "should be array klass");
808 return k;
809 }
810
811
812 void java_lang_Class::set_array_klass(oop java_class, Klass* klass) {
813 assert(klass->is_klass() && klass->oop_is_array(), "should be array klass");
814 java_class->metadata_field_put(_array_klass_offset, klass);
815 }
816
817
818 bool java_lang_Class::is_primitive(oop java_class) {
819 // should assert:
820 //assert(java_lang_Class::is_instance(java_class), "must be a Class object");
821 bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL);
822
823 #ifdef ASSERT
824 if (is_primitive) {
825 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
826 assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()),
827 "Should be either the T_VOID primitive or a java primitive");
828 }
829 #endif
830
831 return is_primitive;
832 }
833
834
835 BasicType java_lang_Class::primitive_type(oop java_class) {
836 assert(java_lang_Class::is_primitive(java_class), "just checking");
837 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
838 BasicType type = T_VOID;
839 if (ak != NULL) {
840 // Note: create_basic_type_mirror above initializes ak to a non-null value.
841 type = ArrayKlass::cast(ak)->element_type();
842 } else {
843 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
844 }
845 assert(Universe::java_mirror(type) == java_class, "must be consistent");
846 return type;
847 }
848
849 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
850 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
851 if (is_primitive(java_class)) {
852 if (reference_klass != NULL)
853 (*reference_klass) = NULL;
854 return primitive_type(java_class);
855 } else {
856 if (reference_klass != NULL)
857 (*reference_klass) = as_Klass(java_class);
858 return T_OBJECT;
859 }
860 }
861
862
863 oop java_lang_Class::primitive_mirror(BasicType t) {
864 oop mirror = Universe::java_mirror(t);
865 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class");
866 assert(java_lang_Class::is_primitive(mirror), "must be primitive");
867 return mirror;
868 }
869
870 bool java_lang_Class::offsets_computed = false;
871 int java_lang_Class::classRedefinedCount_offset = -1;
872
873 void java_lang_Class::compute_offsets() {
874 assert(!offsets_computed, "offsets should be initialized only once");
875 offsets_computed = true;
876
877 Thread* THREAD = Thread::current();
878 Klass* k = SystemDictionary::Class_klass();
879 compute_offset(_classData_offset, k, SymbolTable::new_symbol("classData", THREAD), SymbolTable::new_symbol("Ljava/lang/Class$ClassData;", THREAD));
880 // The classRedefinedCount field is only present starting in 1.5,
881 // so don't go fatal.
882 compute_optional_offset(classRedefinedCount_offset, k, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature());
883
884 // Needs to be optional because the old build runs Queens during bootstrapping
885 // and jdk8-9 doesn't have coordinated pushes yet.
886 compute_optional_offset(_class_loader_offset,
887 k, vmSymbols::classLoader_name(),
888 vmSymbols::classloader_signature());
889
890 compute_offset(_component_mirror_offset,
891 k, vmSymbols::componentType_name(),
892 vmSymbols::class_signature());
893
894 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have
895 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops
896 // GC treats them the same.
897 _init_lock_offset = _component_mirror_offset;
898
899 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
900 }
901
902 oop java_lang_Class::classData(oop obj) {
903 return obj->obj_field_volatile(_classData_offset);
904 }
905
906 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
907 if (classRedefinedCount_offset == -1) {
908 // If we don't have an offset for it then just return -1 as a marker.
909 return -1;
910 }
911
912 return the_class_mirror->int_field(classRedefinedCount_offset);
913 }
914
915 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
916 if (classRedefinedCount_offset == -1) {
917 // If we don't have an offset for it then nothing to set.
918 return;
919 }
920
921 the_class_mirror->int_field_put(classRedefinedCount_offset, value);
922 }
923
924 int java_lang_Class_ClassData::_elementData_offset;
925 int java_lang_Class_ClassData::_size_offset;
926
927 void java_lang_Class_ClassData::compute_offsets() {
928 Thread* THREAD = Thread::current();
929 Klass* k = SystemDictionary::Class_ClassData_klass();
930 compute_offset(_elementData_offset, k, SymbolTable::new_symbol("elementData", THREAD), SymbolTable::new_symbol("[Ljava/lang/Comparable;", THREAD));
931 compute_offset(_size_offset, k, SymbolTable::new_symbol("size", THREAD), vmSymbols::int_signature());
932 }
933
934 bool java_lang_Class_ClassData::is_instance(oop obj) {
935 return obj != NULL && obj->klass() == SystemDictionary::Class_ClassData_klass();
936 }
937
938 objArrayOop java_lang_Class_ClassData::elementData(oop obj) {
939 assert(is_instance(obj), err_msg("%s", obj == NULL ? "null" : obj->klass()->external_name()));
940 return (objArrayOop) obj->obj_field(_elementData_offset);
941 }
942
943 int java_lang_Class_ClassData::size(oop obj) {
944 assert(is_instance(obj), err_msg("%s", obj == NULL ? "null" : obj->klass()->external_name()));
945 return obj->int_field(_size_offset);
946 }
947
948 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
949 // platform thread structure, and a eetop offset which was used for thread
950 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
951 // merged, so in the HotSpot VM we just use the eetop field for the thread
952 // instead of the privateInfo_offset.
953 //
954 // Note: The stackSize field is only present starting in 1.4.
955
956 int java_lang_Thread::_name_offset = 0;
957 int java_lang_Thread::_group_offset = 0;
958 int java_lang_Thread::_contextClassLoader_offset = 0;
959 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
960 int java_lang_Thread::_priority_offset = 0;
961 int java_lang_Thread::_eetop_offset = 0;
962 int java_lang_Thread::_daemon_offset = 0;
963 int java_lang_Thread::_stillborn_offset = 0;
964 int java_lang_Thread::_stackSize_offset = 0;
965 int java_lang_Thread::_tid_offset = 0;
966 int java_lang_Thread::_thread_status_offset = 0;
967 int java_lang_Thread::_park_blocker_offset = 0;
968 int java_lang_Thread::_park_event_offset = 0 ;
969
970
971 void java_lang_Thread::compute_offsets() {
972 assert(_group_offset == 0, "offsets should be initialized only once");
973
974 Klass* k = SystemDictionary::Thread_klass();
975 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::char_array_signature());
976 compute_offset(_group_offset, k, vmSymbols::group_name(), vmSymbols::threadgroup_signature());
977 compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature());
978 compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature());
979 compute_offset(_priority_offset, k, vmSymbols::priority_name(), vmSymbols::int_signature());
980 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
981 compute_offset(_eetop_offset, k, vmSymbols::eetop_name(), vmSymbols::long_signature());
982 compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature());
983 // The stackSize field is only present starting in 1.4, so don't go fatal.
984 compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature());
985 // The tid and thread_status fields are only present starting in 1.5, so don't go fatal.
986 compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature());
987 compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature());
988 // The parkBlocker field is only present starting in 1.6, so don't go fatal.
989 compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature());
990 compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(),
991 vmSymbols::long_signature());
992 }
993
994
995 JavaThread* java_lang_Thread::thread(oop java_thread) {
996 return (JavaThread*)java_thread->address_field(_eetop_offset);
997 }
998
999
1000 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1001 java_thread->address_field_put(_eetop_offset, (address)thread);
1002 }
1003
1004
1005 typeArrayOop java_lang_Thread::name(oop java_thread) {
1006 oop name = java_thread->obj_field(_name_offset);
1007 assert(name == NULL || (name->is_typeArray() && TypeArrayKlass::cast(name->klass())->element_type() == T_CHAR), "just checking");
1008 return typeArrayOop(name);
1009 }
1010
1011
1012 void java_lang_Thread::set_name(oop java_thread, typeArrayOop name) {
1013 assert(java_thread->obj_field(_name_offset) == NULL, "name should be NULL");
1014 java_thread->obj_field_put(_name_offset, name);
1015 }
1016
1017
1018 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1019 return (ThreadPriority)java_thread->int_field(_priority_offset);
1020 }
1021
1022
1023 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1024 java_thread->int_field_put(_priority_offset, priority);
1025 }
1026
1027
1028 oop java_lang_Thread::threadGroup(oop java_thread) {
1029 return java_thread->obj_field(_group_offset);
1030 }
1031
1032
1033 bool java_lang_Thread::is_stillborn(oop java_thread) {
1034 return java_thread->bool_field(_stillborn_offset) != 0;
1035 }
1036
1037
1038 // We never have reason to turn the stillborn bit off
1039 void java_lang_Thread::set_stillborn(oop java_thread) {
1040 java_thread->bool_field_put(_stillborn_offset, true);
1041 }
1042
1043
1044 bool java_lang_Thread::is_alive(oop java_thread) {
1045 JavaThread* thr = java_lang_Thread::thread(java_thread);
1046 return (thr != NULL);
1047 }
1048
1049
1050 bool java_lang_Thread::is_daemon(oop java_thread) {
1051 return java_thread->bool_field(_daemon_offset) != 0;
1052 }
1053
1054
1055 void java_lang_Thread::set_daemon(oop java_thread) {
1056 java_thread->bool_field_put(_daemon_offset, true);
1057 }
1058
1059 oop java_lang_Thread::context_class_loader(oop java_thread) {
1060 return java_thread->obj_field(_contextClassLoader_offset);
1061 }
1062
1063 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
1064 return java_thread->obj_field(_inheritedAccessControlContext_offset);
1065 }
1066
1067
1068 jlong java_lang_Thread::stackSize(oop java_thread) {
1069 if (_stackSize_offset > 0) {
1070 return java_thread->long_field(_stackSize_offset);
1071 } else {
1072 return 0;
1073 }
1074 }
1075
1076 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1077 void java_lang_Thread::set_thread_status(oop java_thread,
1078 java_lang_Thread::ThreadStatus status) {
1079 // The threadStatus is only present starting in 1.5
1080 if (_thread_status_offset > 0) {
1081 java_thread->int_field_put(_thread_status_offset, status);
1082 }
1083 }
1084
1085 // Read thread status value from threadStatus field in java.lang.Thread java class.
1086 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1087 assert(Thread::current()->is_Watcher_thread() || Thread::current()->is_VM_thread() ||
1088 JavaThread::current()->thread_state() == _thread_in_vm,
1089 "Java Thread is not running in vm");
1090 // The threadStatus is only present starting in 1.5
1091 if (_thread_status_offset > 0) {
1092 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1093 } else {
1094 // All we can easily figure out is if it is alive, but that is
1095 // enough info for a valid unknown status.
1096 // These aren't restricted to valid set ThreadStatus values, so
1097 // use JVMTI values and cast.
1098 JavaThread* thr = java_lang_Thread::thread(java_thread);
1099 if (thr == NULL) {
1100 // the thread hasn't run yet or is in the process of exiting
1101 return NEW;
1102 }
1103 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE;
1104 }
1105 }
1106
1107
1108 jlong java_lang_Thread::thread_id(oop java_thread) {
1109 // The thread ID field is only present starting in 1.5
1110 if (_tid_offset > 0) {
1111 return java_thread->long_field(_tid_offset);
1112 } else {
1113 return 0;
1114 }
1115 }
1116
1117 oop java_lang_Thread::park_blocker(oop java_thread) {
1118 assert(JDK_Version::current().supports_thread_park_blocker() &&
1119 _park_blocker_offset != 0, "Must support parkBlocker field");
1120
1121 if (_park_blocker_offset > 0) {
1122 return java_thread->obj_field(_park_blocker_offset);
1123 }
1124
1125 return NULL;
1126 }
1127
1128 jlong java_lang_Thread::park_event(oop java_thread) {
1129 if (_park_event_offset > 0) {
1130 return java_thread->long_field(_park_event_offset);
1131 }
1132 return 0;
1133 }
1134
1135 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) {
1136 if (_park_event_offset > 0) {
1137 java_thread->long_field_put(_park_event_offset, ptr);
1138 return true;
1139 }
1140 return false;
1141 }
1142
1143
1144 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1145 assert(_thread_status_offset != 0, "Must have thread status");
1146 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1147 switch (status) {
1148 case NEW : return "NEW";
1149 case RUNNABLE : return "RUNNABLE";
1150 case SLEEPING : return "TIMED_WAITING (sleeping)";
1151 case IN_OBJECT_WAIT : return "WAITING (on object monitor)";
1152 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
1153 case PARKED : return "WAITING (parking)";
1154 case PARKED_TIMED : return "TIMED_WAITING (parking)";
1155 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1156 case TERMINATED : return "TERMINATED";
1157 default : return "UNKNOWN";
1158 };
1159 }
1160 int java_lang_ThreadGroup::_parent_offset = 0;
1161 int java_lang_ThreadGroup::_name_offset = 0;
1162 int java_lang_ThreadGroup::_threads_offset = 0;
1163 int java_lang_ThreadGroup::_groups_offset = 0;
1164 int java_lang_ThreadGroup::_maxPriority_offset = 0;
1165 int java_lang_ThreadGroup::_destroyed_offset = 0;
1166 int java_lang_ThreadGroup::_daemon_offset = 0;
1167 int java_lang_ThreadGroup::_vmAllowSuspension_offset = 0;
1168 int java_lang_ThreadGroup::_nthreads_offset = 0;
1169 int java_lang_ThreadGroup::_ngroups_offset = 0;
1170
1171 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
1172 assert(java_thread_group->is_oop(), "thread group must be oop");
1173 return java_thread_group->obj_field(_parent_offset);
1174 }
1175
1176 // ("name as oop" accessor is not necessary)
1177
1178 typeArrayOop java_lang_ThreadGroup::name(oop java_thread_group) {
1179 oop name = java_thread_group->obj_field(_name_offset);
1180 // ThreadGroup.name can be null
1181 return name == NULL ? (typeArrayOop)NULL : java_lang_String::value(name);
1182 }
1183
1184 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
1185 assert(java_thread_group->is_oop(), "thread group must be oop");
1186 return java_thread_group->int_field(_nthreads_offset);
1187 }
1188
1189 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
1190 oop threads = java_thread_group->obj_field(_threads_offset);
1191 assert(threads != NULL, "threadgroups should have threads");
1192 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
1193 return objArrayOop(threads);
1194 }
1195
1196 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
1197 assert(java_thread_group->is_oop(), "thread group must be oop");
1198 return java_thread_group->int_field(_ngroups_offset);
1199 }
1200
1201 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
1202 oop groups = java_thread_group->obj_field(_groups_offset);
1203 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
1204 return objArrayOop(groups);
1205 }
1206
1207 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1208 assert(java_thread_group->is_oop(), "thread group must be oop");
1209 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1210 }
1211
1212 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
1213 assert(java_thread_group->is_oop(), "thread group must be oop");
1214 return java_thread_group->bool_field(_destroyed_offset) != 0;
1215 }
1216
1217 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1218 assert(java_thread_group->is_oop(), "thread group must be oop");
1219 return java_thread_group->bool_field(_daemon_offset) != 0;
1220 }
1221
1222 bool java_lang_ThreadGroup::is_vmAllowSuspension(oop java_thread_group) {
1223 assert(java_thread_group->is_oop(), "thread group must be oop");
1224 return java_thread_group->bool_field(_vmAllowSuspension_offset) != 0;
1225 }
1226
1227 void java_lang_ThreadGroup::compute_offsets() {
1228 assert(_parent_offset == 0, "offsets should be initialized only once");
1229
1230 Klass* k = SystemDictionary::ThreadGroup_klass();
1231
1232 compute_offset(_parent_offset, k, vmSymbols::parent_name(), vmSymbols::threadgroup_signature());
1233 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1234 compute_offset(_threads_offset, k, vmSymbols::threads_name(), vmSymbols::thread_array_signature());
1235 compute_offset(_groups_offset, k, vmSymbols::groups_name(), vmSymbols::threadgroup_array_signature());
1236 compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature());
1237 compute_offset(_destroyed_offset, k, vmSymbols::destroyed_name(), vmSymbols::bool_signature());
1238 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
1239 compute_offset(_vmAllowSuspension_offset, k, vmSymbols::vmAllowSuspension_name(), vmSymbols::bool_signature());
1240 compute_offset(_nthreads_offset, k, vmSymbols::nthreads_name(), vmSymbols::int_signature());
1241 compute_offset(_ngroups_offset, k, vmSymbols::ngroups_name(), vmSymbols::int_signature());
1242 }
1243
1244 oop java_lang_Throwable::unassigned_stacktrace() {
1245 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Throwable_klass());
1246 address addr = ik->static_field_addr(static_unassigned_stacktrace_offset);
1247 if (UseCompressedOops) {
1248 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
1249 } else {
1250 return oopDesc::load_decode_heap_oop((oop*)addr);
1251 }
1252 }
1253
1254 oop java_lang_Throwable::backtrace(oop throwable) {
1255 return throwable->obj_field_acquire(backtrace_offset);
1256 }
1257
1258
1259 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
1260 throwable->release_obj_field_put(backtrace_offset, value);
1261 }
1262
1263
1264 oop java_lang_Throwable::message(oop throwable) {
1265 return throwable->obj_field(detailMessage_offset);
1266 }
1267
1268
1269 oop java_lang_Throwable::message(Handle throwable) {
1270 return throwable->obj_field(detailMessage_offset);
1271 }
1272
1273
1274 // Return Symbol for detailed_message or NULL
1275 Symbol* java_lang_Throwable::detail_message(oop throwable) {
1276 PRESERVE_EXCEPTION_MARK; // Keep original exception
1277 oop detailed_message = java_lang_Throwable::message(throwable);
1278 if (detailed_message != NULL) {
1279 return java_lang_String::as_symbol(detailed_message, THREAD);
1280 }
1281 return NULL;
1282 }
1283
1284 void java_lang_Throwable::set_message(oop throwable, oop value) {
1285 throwable->obj_field_put(detailMessage_offset, value);
1286 }
1287
1288
1289 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
1290 throwable->obj_field_put(stackTrace_offset, st_element_array);
1291 }
1292
1293 void java_lang_Throwable::clear_stacktrace(oop throwable) {
1294 set_stacktrace(throwable, NULL);
1295 }
1296
1297
1298 void java_lang_Throwable::print(oop throwable, outputStream* st) {
1299 ResourceMark rm;
1300 Klass* k = throwable->klass();
1301 assert(k != NULL, "just checking");
1302 st->print("%s", InstanceKlass::cast(k)->external_name());
1303 oop msg = message(throwable);
1304 if (msg != NULL) {
1305 st->print(": %s", java_lang_String::as_utf8_string(msg));
1306 }
1307 }
1308
1309
1310 void java_lang_Throwable::print(Handle throwable, outputStream* st) {
1311 ResourceMark rm;
1312 Klass* k = throwable->klass();
1313 assert(k != NULL, "just checking");
1314 st->print("%s", InstanceKlass::cast(k)->external_name());
1315 oop msg = message(throwable);
1316 if (msg != NULL) {
1317 st->print(": %s", java_lang_String::as_utf8_string(msg));
1318 }
1319 }
1320
1321 // After this many redefines, the stack trace is unreliable.
1322 const int MAX_VERSION = USHRT_MAX;
1323
1324 // Helper backtrace functions to store bci|version together.
1325 static inline int merge_bci_and_version(int bci, int version) {
1326 // only store u2 for version, checking for overflow.
1327 if (version > USHRT_MAX || version < 0) version = MAX_VERSION;
1328 assert((jushort)bci == bci, "bci should be short");
1329 return build_int_from_shorts(version, bci);
1330 }
1331
1332 static inline int bci_at(unsigned int merged) {
1333 return extract_high_short_from_int(merged);
1334 }
1335 static inline int version_at(unsigned int merged) {
1336 return extract_low_short_from_int(merged);
1337 }
1338
1339 static inline bool version_matches(Method* method, int version) {
1340 return (method->constants()->version() == version && version < MAX_VERSION);
1341 }
1342
1343 static inline int get_line_number(Method* method, int bci) {
1344 int line_number = 0;
1345 if (method->is_native()) {
1346 // Negative value different from -1 below, enabling Java code in
1347 // class java.lang.StackTraceElement to distinguish "native" from
1348 // "no LineNumberTable". JDK tests for -2.
1349 line_number = -2;
1350 } else {
1351 // Returns -1 if no LineNumberTable, and otherwise actual line number
1352 line_number = method->line_number_from_bci(bci);
1353 if (line_number == -1 && ShowHiddenFrames) {
1354 line_number = bci + 1000000;
1355 }
1356 }
1357 return line_number;
1358 }
1359
1360 // This class provides a simple wrapper over the internal structure of
1361 // exception backtrace to insulate users of the backtrace from needing
1362 // to know what it looks like.
1363 class BacktraceBuilder: public StackObj {
1364 private:
1365 Handle _backtrace;
1366 objArrayOop _head;
1367 typeArrayOop _methods;
1368 typeArrayOop _bcis;
1369 objArrayOop _mirrors;
1370 int _index;
1371 No_Safepoint_Verifier _nsv;
1372
1373 public:
1374
1375 enum {
1376 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
1377 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
1378 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
1379 trace_next_offset = java_lang_Throwable::trace_next_offset,
1380 trace_size = java_lang_Throwable::trace_size,
1381 trace_chunk_size = java_lang_Throwable::trace_chunk_size
1382 };
1383
1384 // get info out of chunks
1385 static typeArrayOop get_methods(objArrayHandle chunk) {
1386 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
1387 assert(methods != NULL, "method array should be initialized in backtrace");
1388 return methods;
1389 }
1390 static typeArrayOop get_bcis(objArrayHandle chunk) {
1391 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1392 assert(bcis != NULL, "bci array should be initialized in backtrace");
1393 return bcis;
1394 }
1395 static objArrayOop get_mirrors(objArrayHandle chunk) {
1396 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
1397 assert(mirrors != NULL, "mirror array should be initialized in backtrace");
1398 return mirrors;
1399 }
1400
1401 // constructor for new backtrace
1402 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _mirrors(NULL) {
1403 expand(CHECK);
1404 _backtrace = _head;
1405 _index = 0;
1406 }
1407
1408 BacktraceBuilder(objArrayHandle backtrace) {
1409 _methods = get_methods(backtrace);
1410 _bcis = get_bcis(backtrace);
1411 _mirrors = get_mirrors(backtrace);
1412 assert(_methods->length() == _bcis->length() &&
1413 _methods->length() == _mirrors->length(),
1414 "method and source information arrays should match");
1415
1416 // head is the preallocated backtrace
1417 _backtrace = _head = backtrace();
1418 _index = 0;
1419 }
1420
1421 void expand(TRAPS) {
1422 objArrayHandle old_head(THREAD, _head);
1423 Pause_No_Safepoint_Verifier pnsv(&_nsv);
1424
1425 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
1426 objArrayHandle new_head(THREAD, head);
1427
1428 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1429 typeArrayHandle new_methods(THREAD, methods);
1430
1431 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
1432 typeArrayHandle new_bcis(THREAD, bcis);
1433
1434 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
1435 objArrayHandle new_mirrors(THREAD, mirrors);
1436
1437 if (!old_head.is_null()) {
1438 old_head->obj_at_put(trace_next_offset, new_head());
1439 }
1440 new_head->obj_at_put(trace_methods_offset, new_methods());
1441 new_head->obj_at_put(trace_bcis_offset, new_bcis());
1442 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
1443
1444 _head = new_head();
1445 _methods = new_methods();
1446 _bcis = new_bcis();
1447 _mirrors = new_mirrors();
1448 _index = 0;
1449 }
1450
1451 oop backtrace() {
1452 return _backtrace();
1453 }
1454
1455 inline void push(Method* method, int bci, TRAPS) {
1456 // Smear the -1 bci to 0 since the array only holds unsigned
1457 // shorts. The later line number lookup would just smear the -1
1458 // to a 0 even if it could be recorded.
1459 if (bci == SynchronizationEntryBCI) bci = 0;
1460
1461 if (_index >= trace_chunk_size) {
1462 methodHandle mhandle(THREAD, method);
1463 expand(CHECK);
1464 method = mhandle();
1465 }
1466
1467 _methods->short_at_put(_index, method->method_idnum());
1468 _bcis->int_at_put(_index, merge_bci_and_version(bci, method->constants()->version()));
1469
1470 // We need to save the mirrors in the backtrace to keep the class
1471 // from being unloaded while we still have this stack trace.
1472 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror");
1473 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
1474 _index++;
1475 }
1476
1477 };
1478
1479 // Print stack trace element to resource allocated buffer
1480 char* java_lang_Throwable::print_stack_element_to_buffer(Handle mirror,
1481 int method_id, int version, int bci) {
1482
1483 // Get strings and string lengths
1484 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
1485 const char* klass_name = holder->external_name();
1486 int buf_len = (int)strlen(klass_name);
1487
1488 // The method id may point to an obsolete method, can't get more stack information
1489 Method* method = holder->method_with_idnum(method_id);
1490 if (method == NULL) {
1491 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
1492 // This is what the java code prints in this case - added Redefined
1493 sprintf(buf, "\tat %s.null (Redefined)", klass_name);
1494 return buf;
1495 }
1496
1497 char* method_name = method->name()->as_C_string();
1498 buf_len += (int)strlen(method_name);
1499
1500 char* source_file_name = NULL;
1501 if (version_matches(method, version)) {
1502 Symbol* source = holder->source_file_name();
1503 if (source != NULL) {
1504 source_file_name = source->as_C_string();
1505 buf_len += (int)strlen(source_file_name);
1506 }
1507 }
1508
1509 // Allocate temporary buffer with extra space for formatting and line number
1510 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
1511
1512 // Print stack trace line in buffer
1513 sprintf(buf, "\tat %s.%s", klass_name, method_name);
1514
1515 if (!version_matches(method, version)) {
1516 strcat(buf, "(Redefined)");
1517 } else {
1518 int line_number = get_line_number(method, bci);
1519 if (line_number == -2) {
1520 strcat(buf, "(Native Method)");
1521 } else {
1522 if (source_file_name != NULL && (line_number != -1)) {
1523 // Sourcename and linenumber
1524 sprintf(buf + (int)strlen(buf), "(%s:%d)", source_file_name, line_number);
1525 } else if (source_file_name != NULL) {
1526 // Just sourcename
1527 sprintf(buf + (int)strlen(buf), "(%s)", source_file_name);
1528 } else {
1529 // Neither sourcename nor linenumber
1530 sprintf(buf + (int)strlen(buf), "(Unknown Source)");
1531 }
1532 nmethod* nm = method->code();
1533 if (WizardMode && nm != NULL) {
1534 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
1535 }
1536 }
1537 }
1538
1539 return buf;
1540 }
1541
1542 void java_lang_Throwable::print_stack_element(outputStream *st, Handle mirror,
1543 int method_id, int version, int bci) {
1544 ResourceMark rm;
1545 char* buf = print_stack_element_to_buffer(mirror, method_id, version, bci);
1546 st->print_cr("%s", buf);
1547 }
1548
1549 void java_lang_Throwable::print_stack_element(outputStream *st, methodHandle method, int bci) {
1550 Handle mirror = method->method_holder()->java_mirror();
1551 int method_id = method->method_idnum();
1552 int version = method->constants()->version();
1553 print_stack_element(st, mirror, method_id, version, bci);
1554 }
1555
1556 const char* java_lang_Throwable::no_stack_trace_message() {
1557 return "\t<<no stack trace available>>";
1558 }
1559
1560
1561 // Currently used only for exceptions occurring during startup
1562 void java_lang_Throwable::print_stack_trace(oop throwable, outputStream* st) {
1563 Thread *THREAD = Thread::current();
1564 Handle h_throwable(THREAD, throwable);
1565 while (h_throwable.not_null()) {
1566 objArrayHandle result (THREAD, objArrayOop(backtrace(h_throwable())));
1567 if (result.is_null()) {
1568 st->print_cr("%s", no_stack_trace_message());
1569 return;
1570 }
1571
1572 while (result.not_null()) {
1573
1574 // Get method id, bci, version and mirror from chunk
1575 typeArrayHandle methods (THREAD, BacktraceBuilder::get_methods(result));
1576 typeArrayHandle bcis (THREAD, BacktraceBuilder::get_bcis(result));
1577 objArrayHandle mirrors (THREAD, BacktraceBuilder::get_mirrors(result));
1578
1579 int length = methods()->length();
1580 for (int index = 0; index < length; index++) {
1581 Handle mirror(THREAD, mirrors->obj_at(index));
1582 // NULL mirror means end of stack trace
1583 if (mirror.is_null()) goto handle_cause;
1584 int method = methods->short_at(index);
1585 int version = version_at(bcis->int_at(index));
1586 int bci = bci_at(bcis->int_at(index));
1587 print_stack_element(st, mirror, method, version, bci);
1588 }
1589 result = objArrayHandle(THREAD, objArrayOop(result->obj_at(trace_next_offset)));
1590 }
1591 handle_cause:
1592 {
1593 EXCEPTION_MARK;
1594 JavaValue cause(T_OBJECT);
1595 JavaCalls::call_virtual(&cause,
1596 h_throwable,
1597 KlassHandle(THREAD, h_throwable->klass()),
1598 vmSymbols::getCause_name(),
1599 vmSymbols::void_throwable_signature(),
1600 THREAD);
1601 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
1602 if (HAS_PENDING_EXCEPTION) {
1603 CLEAR_PENDING_EXCEPTION;
1604 h_throwable = Handle();
1605 } else {
1606 h_throwable = Handle(THREAD, (oop) cause.get_jobject());
1607 if (h_throwable.not_null()) {
1608 st->print("Caused by: ");
1609 print(h_throwable, st);
1610 st->cr();
1611 }
1612 }
1613 }
1614 }
1615 }
1616
1617 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method, TRAPS) {
1618 if (!StackTraceInThrowable) return;
1619 ResourceMark rm(THREAD);
1620
1621 // Start out by clearing the backtrace for this object, in case the VM
1622 // runs out of memory while allocating the stack trace
1623 set_backtrace(throwable(), NULL);
1624 // Clear lazily constructed Java level stacktrace if refilling occurs
1625 // This is unnecessary in 1.7+ but harmless
1626 clear_stacktrace(throwable());
1627
1628 int max_depth = MaxJavaStackTraceDepth;
1629 JavaThread* thread = (JavaThread*)THREAD;
1630 BacktraceBuilder bt(CHECK);
1631
1632 // If there is no Java frame just return the method that was being called
1633 // with bci 0
1634 if (!thread->has_last_Java_frame()) {
1635 if (max_depth >= 1 && method() != NULL) {
1636 bt.push(method(), 0, CHECK);
1637 set_backtrace(throwable(), bt.backtrace());
1638 }
1639 return;
1640 }
1641
1642 // Instead of using vframe directly, this version of fill_in_stack_trace
1643 // basically handles everything by hand. This significantly improved the
1644 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
1645 // See bug 6333838 for more details.
1646 // The "ASSERT" here is to verify this method generates the exactly same stack
1647 // trace as utilizing vframe.
1648 #ifdef ASSERT
1649 vframeStream st(thread);
1650 methodHandle st_method(THREAD, st.method());
1651 #endif
1652 int total_count = 0;
1653 RegisterMap map(thread, false);
1654 int decode_offset = 0;
1655 nmethod* nm = NULL;
1656 bool skip_fillInStackTrace_check = false;
1657 bool skip_throwableInit_check = false;
1658 bool skip_hidden = !ShowHiddenFrames;
1659
1660 for (frame fr = thread->last_frame(); max_depth != total_count;) {
1661 Method* method = NULL;
1662 int bci = 0;
1663
1664 // Compiled java method case.
1665 if (decode_offset != 0) {
1666 DebugInfoReadStream stream(nm, decode_offset);
1667 decode_offset = stream.read_int();
1668 method = (Method*)nm->metadata_at(stream.read_int());
1669 bci = stream.read_bci();
1670 } else {
1671 if (fr.is_first_frame()) break;
1672 address pc = fr.pc();
1673 if (fr.is_interpreted_frame()) {
1674 address bcp = fr.interpreter_frame_bcp();
1675 method = fr.interpreter_frame_method();
1676 bci = method->bci_from(bcp);
1677 fr = fr.sender(&map);
1678 } else {
1679 CodeBlob* cb = fr.cb();
1680 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
1681 // but non nmethod
1682 fr = fr.sender(&map);
1683 if (cb == NULL || !cb->is_nmethod()) {
1684 continue;
1685 }
1686 nm = (nmethod*)cb;
1687 if (nm->method()->is_native()) {
1688 method = nm->method();
1689 bci = 0;
1690 } else {
1691 PcDesc* pd = nm->pc_desc_at(pc);
1692 decode_offset = pd->scope_decode_offset();
1693 // if decode_offset is not equal to 0, it will execute the
1694 // "compiled java method case" at the beginning of the loop.
1695 continue;
1696 }
1697 }
1698 }
1699 #ifdef ASSERT
1700 assert(st_method() == method && st.bci() == bci,
1701 "Wrong stack trace");
1702 st.next();
1703 // vframeStream::method isn't GC-safe so store off a copy
1704 // of the Method* in case we GC.
1705 if (!st.at_end()) {
1706 st_method = st.method();
1707 }
1708 #endif
1709
1710 // the format of the stacktrace will be:
1711 // - 1 or more fillInStackTrace frames for the exception class (skipped)
1712 // - 0 or more <init> methods for the exception class (skipped)
1713 // - rest of the stack
1714
1715 if (!skip_fillInStackTrace_check) {
1716 if ((method->name() == vmSymbols::fillInStackTrace_name() ||
1717 method->name() == vmSymbols::fillInStackTrace0_name()) &&
1718 throwable->is_a(method->method_holder())) {
1719 continue;
1720 }
1721 else {
1722 skip_fillInStackTrace_check = true; // gone past them all
1723 }
1724 }
1725 if (!skip_throwableInit_check) {
1726 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
1727
1728 // skip <init> methods of the exception class and superclasses
1729 // This is simlar to classic VM.
1730 if (method->name() == vmSymbols::object_initializer_name() &&
1731 throwable->is_a(method->method_holder())) {
1732 continue;
1733 } else {
1734 // there are none or we've seen them all - either way stop checking
1735 skip_throwableInit_check = true;
1736 }
1737 }
1738 if (method->is_hidden()) {
1739 if (skip_hidden) continue;
1740 }
1741 bt.push(method, bci, CHECK);
1742 total_count++;
1743 }
1744
1745 // Put completed stack trace into throwable object
1746 set_backtrace(throwable(), bt.backtrace());
1747 }
1748
1749 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method) {
1750 // No-op if stack trace is disabled
1751 if (!StackTraceInThrowable) {
1752 return;
1753 }
1754
1755 // Disable stack traces for some preallocated out of memory errors
1756 if (!Universe::should_fill_in_stack_trace(throwable)) {
1757 return;
1758 }
1759
1760 PRESERVE_EXCEPTION_MARK;
1761
1762 JavaThread* thread = JavaThread::active();
1763 fill_in_stack_trace(throwable, method, thread);
1764 // ignore exceptions thrown during stack trace filling
1765 CLEAR_PENDING_EXCEPTION;
1766 }
1767
1768 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
1769 // Allocate stack trace - backtrace is created but not filled in
1770
1771 // No-op if stack trace is disabled
1772 if (!StackTraceInThrowable) return;
1773 BacktraceBuilder bt(CHECK); // creates a backtrace
1774 set_backtrace(throwable(), bt.backtrace());
1775 }
1776
1777
1778 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
1779 // Fill in stack trace into preallocated backtrace (no GC)
1780
1781 // No-op if stack trace is disabled
1782 if (!StackTraceInThrowable) return;
1783
1784 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
1785
1786 JavaThread* THREAD = JavaThread::current();
1787
1788 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
1789 assert(backtrace.not_null(), "backtrace should have been preallocated");
1790
1791 ResourceMark rm(THREAD);
1792 vframeStream st(THREAD);
1793
1794 BacktraceBuilder bt(backtrace);
1795
1796 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
1797 // methods as preallocated errors aren't created by "java" code.
1798
1799 // fill in as much stack trace as possible
1800 typeArrayOop methods = BacktraceBuilder::get_methods(backtrace);
1801 int max_chunks = MIN2(methods->length(), (int)MaxJavaStackTraceDepth);
1802 int chunk_count = 0;
1803
1804 for (;!st.at_end(); st.next()) {
1805 bt.push(st.method(), st.bci(), CHECK);
1806 chunk_count++;
1807
1808 // Bail-out for deep stacks
1809 if (chunk_count >= max_chunks) break;
1810 }
1811
1812 // We support the Throwable immutability protocol defined for Java 7.
1813 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
1814 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized");
1815 }
1816
1817
1818 int java_lang_Throwable::get_stack_trace_depth(oop throwable, TRAPS) {
1819 if (throwable == NULL) {
1820 THROW_0(vmSymbols::java_lang_NullPointerException());
1821 }
1822 objArrayOop chunk = objArrayOop(backtrace(throwable));
1823 int depth = 0;
1824 if (chunk != NULL) {
1825 // Iterate over chunks and count full ones
1826 while (true) {
1827 objArrayOop next = objArrayOop(chunk->obj_at(trace_next_offset));
1828 if (next == NULL) break;
1829 depth += trace_chunk_size;
1830 chunk = next;
1831 }
1832 assert(chunk != NULL && chunk->obj_at(trace_next_offset) == NULL, "sanity check");
1833 // Count element in remaining partial chunk. NULL value for mirror
1834 // marks the end of the stack trace elements that are saved.
1835 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk);
1836 assert(mirrors != NULL, "sanity check");
1837 for (int i = 0; i < mirrors->length(); i++) {
1838 if (mirrors->obj_at(i) == NULL) break;
1839 depth++;
1840 }
1841 }
1842 return depth;
1843 }
1844
1845
1846 oop java_lang_Throwable::get_stack_trace_element(oop throwable, int index, TRAPS) {
1847 if (throwable == NULL) {
1848 THROW_0(vmSymbols::java_lang_NullPointerException());
1849 }
1850 if (index < 0) {
1851 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1852 }
1853 // Compute how many chunks to skip and index into actual chunk
1854 objArrayOop chunk = objArrayOop(backtrace(throwable));
1855 int skip_chunks = index / trace_chunk_size;
1856 int chunk_index = index % trace_chunk_size;
1857 while (chunk != NULL && skip_chunks > 0) {
1858 chunk = objArrayOop(chunk->obj_at(trace_next_offset));
1859 skip_chunks--;
1860 }
1861 if (chunk == NULL) {
1862 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1863 }
1864 // Get method id, bci, version and mirror from chunk
1865 typeArrayOop methods = BacktraceBuilder::get_methods(chunk);
1866 typeArrayOop bcis = BacktraceBuilder::get_bcis(chunk);
1867 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk);
1868
1869 assert(methods != NULL && bcis != NULL && mirrors != NULL, "sanity check");
1870
1871 int method = methods->short_at(chunk_index);
1872 int version = version_at(bcis->int_at(chunk_index));
1873 int bci = bci_at(bcis->int_at(chunk_index));
1874 Handle mirror(THREAD, mirrors->obj_at(chunk_index));
1875
1876 // Chunk can be partial full
1877 if (mirror.is_null()) {
1878 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1879 }
1880
1881 oop element = java_lang_StackTraceElement::create(mirror, method, version, bci, CHECK_0);
1882 return element;
1883 }
1884
1885 oop java_lang_StackTraceElement::create(Handle mirror, int method_id,
1886 int version, int bci, TRAPS) {
1887 // Allocate java.lang.StackTraceElement instance
1888 Klass* k = SystemDictionary::StackTraceElement_klass();
1889 assert(k != NULL, "must be loaded in 1.4+");
1890 instanceKlassHandle ik (THREAD, k);
1891 if (ik->should_be_initialized()) {
1892 ik->initialize(CHECK_0);
1893 }
1894
1895 Handle element = ik->allocate_instance_handle(CHECK_0);
1896 // Fill in class name
1897 ResourceMark rm(THREAD);
1898 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
1899 const char* str = holder->external_name();
1900 oop classname = StringTable::intern((char*) str, CHECK_0);
1901 java_lang_StackTraceElement::set_declaringClass(element(), classname);
1902
1903 Method* method = holder->method_with_idnum(method_id);
1904 // Method on stack may be obsolete because it was redefined so cannot be
1905 // found by idnum.
1906 if (method == NULL) {
1907 // leave name and fileName null
1908 java_lang_StackTraceElement::set_lineNumber(element(), -1);
1909 return element();
1910 }
1911
1912 // Fill in method name
1913 oop methodname = StringTable::intern(method->name(), CHECK_0);
1914 java_lang_StackTraceElement::set_methodName(element(), methodname);
1915
1916 if (!version_matches(method, version)) {
1917 // The method was redefined, accurate line number information isn't available
1918 java_lang_StackTraceElement::set_fileName(element(), NULL);
1919 java_lang_StackTraceElement::set_lineNumber(element(), -1);
1920 } else {
1921 // Fill in source file name and line number.
1922 Symbol* source = holder->source_file_name();
1923 if (ShowHiddenFrames && source == NULL)
1924 source = vmSymbols::unknown_class_name();
1925 oop filename = StringTable::intern(source, CHECK_0);
1926 java_lang_StackTraceElement::set_fileName(element(), filename);
1927
1928 int line_number = get_line_number(method, bci);
1929 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
1930 }
1931 return element();
1932 }
1933
1934 oop java_lang_StackTraceElement::create(methodHandle method, int bci, TRAPS) {
1935 Handle mirror (THREAD, method->method_holder()->java_mirror());
1936 int method_id = method->method_idnum();
1937 return create(mirror, method_id, method->constants()->version(), bci, THREAD);
1938 }
1939
1940 void java_lang_reflect_AccessibleObject::compute_offsets() {
1941 Klass* k = SystemDictionary::reflect_AccessibleObject_klass();
1942 compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature());
1943 }
1944
1945 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
1946 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1947 return (jboolean) reflect->bool_field(override_offset);
1948 }
1949
1950 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
1951 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1952 reflect->bool_field_put(override_offset, (int) value);
1953 }
1954
1955 void java_lang_reflect_Method::compute_offsets() {
1956 Klass* k = SystemDictionary::reflect_Method_klass();
1957 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
1958 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1959 compute_offset(returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature());
1960 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
1961 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
1962 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
1963 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
1964 // The generic signature and annotations fields are only present in 1.5
1965 signature_offset = -1;
1966 annotations_offset = -1;
1967 parameter_annotations_offset = -1;
1968 annotation_default_offset = -1;
1969 type_annotations_offset = -1;
1970 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
1971 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
1972 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
1973 compute_optional_offset(annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature());
1974 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
1975 }
1976
1977 Handle java_lang_reflect_Method::create(TRAPS) {
1978 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1979 Klass* klass = SystemDictionary::reflect_Method_klass();
1980 // This class is eagerly initialized during VM initialization, since we keep a refence
1981 // to one of the methods
1982 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
1983 return InstanceKlass::cast(klass)->allocate_instance_handle(CHECK_NH);
1984 }
1985
1986 oop java_lang_reflect_Method::clazz(oop reflect) {
1987 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1988 return reflect->obj_field(clazz_offset);
1989 }
1990
1991 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
1992 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1993 reflect->obj_field_put(clazz_offset, value);
1994 }
1995
1996 int java_lang_reflect_Method::slot(oop reflect) {
1997 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1998 return reflect->int_field(slot_offset);
1999 }
2000
2001 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
2002 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2003 reflect->int_field_put(slot_offset, value);
2004 }
2005
2006 oop java_lang_reflect_Method::name(oop method) {
2007 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2008 return method->obj_field(name_offset);
2009 }
2010
2011 void java_lang_reflect_Method::set_name(oop method, oop value) {
2012 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2013 method->obj_field_put(name_offset, value);
2014 }
2015
2016 oop java_lang_reflect_Method::return_type(oop method) {
2017 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2018 return method->obj_field(returnType_offset);
2019 }
2020
2021 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
2022 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2023 method->obj_field_put(returnType_offset, value);
2024 }
2025
2026 oop java_lang_reflect_Method::parameter_types(oop method) {
2027 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2028 return method->obj_field(parameterTypes_offset);
2029 }
2030
2031 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
2032 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2033 method->obj_field_put(parameterTypes_offset, value);
2034 }
2035
2036 oop java_lang_reflect_Method::exception_types(oop method) {
2037 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2038 return method->obj_field(exceptionTypes_offset);
2039 }
2040
2041 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
2042 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2043 method->obj_field_put(exceptionTypes_offset, value);
2044 }
2045
2046 int java_lang_reflect_Method::modifiers(oop method) {
2047 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2048 return method->int_field(modifiers_offset);
2049 }
2050
2051 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
2052 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2053 method->int_field_put(modifiers_offset, value);
2054 }
2055
2056 bool java_lang_reflect_Method::has_signature_field() {
2057 return (signature_offset >= 0);
2058 }
2059
2060 oop java_lang_reflect_Method::signature(oop method) {
2061 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2062 assert(has_signature_field(), "signature field must be present");
2063 return method->obj_field(signature_offset);
2064 }
2065
2066 void java_lang_reflect_Method::set_signature(oop method, oop value) {
2067 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2068 assert(has_signature_field(), "signature field must be present");
2069 method->obj_field_put(signature_offset, value);
2070 }
2071
2072 bool java_lang_reflect_Method::has_annotations_field() {
2073 return (annotations_offset >= 0);
2074 }
2075
2076 oop java_lang_reflect_Method::annotations(oop method) {
2077 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2078 assert(has_annotations_field(), "annotations field must be present");
2079 return method->obj_field(annotations_offset);
2080 }
2081
2082 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
2083 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2084 assert(has_annotations_field(), "annotations field must be present");
2085 method->obj_field_put(annotations_offset, value);
2086 }
2087
2088 bool java_lang_reflect_Method::has_parameter_annotations_field() {
2089 return (parameter_annotations_offset >= 0);
2090 }
2091
2092 oop java_lang_reflect_Method::parameter_annotations(oop method) {
2093 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2094 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2095 return method->obj_field(parameter_annotations_offset);
2096 }
2097
2098 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
2099 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2100 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2101 method->obj_field_put(parameter_annotations_offset, value);
2102 }
2103
2104 bool java_lang_reflect_Method::has_annotation_default_field() {
2105 return (annotation_default_offset >= 0);
2106 }
2107
2108 oop java_lang_reflect_Method::annotation_default(oop method) {
2109 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2110 assert(has_annotation_default_field(), "annotation default field must be present");
2111 return method->obj_field(annotation_default_offset);
2112 }
2113
2114 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
2115 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2116 assert(has_annotation_default_field(), "annotation default field must be present");
2117 method->obj_field_put(annotation_default_offset, value);
2118 }
2119
2120 bool java_lang_reflect_Method::has_type_annotations_field() {
2121 return (type_annotations_offset >= 0);
2122 }
2123
2124 oop java_lang_reflect_Method::type_annotations(oop method) {
2125 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2126 assert(has_type_annotations_field(), "type_annotations field must be present");
2127 return method->obj_field(type_annotations_offset);
2128 }
2129
2130 void java_lang_reflect_Method::set_type_annotations(oop method, oop value) {
2131 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2132 assert(has_type_annotations_field(), "type_annotations field must be present");
2133 method->obj_field_put(type_annotations_offset, value);
2134 }
2135
2136 void java_lang_reflect_Constructor::compute_offsets() {
2137 Klass* k = SystemDictionary::reflect_Constructor_klass();
2138 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
2139 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
2140 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
2141 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
2142 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2143 // The generic signature and annotations fields are only present in 1.5
2144 signature_offset = -1;
2145 annotations_offset = -1;
2146 parameter_annotations_offset = -1;
2147 type_annotations_offset = -1;
2148 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
2149 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
2150 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
2151 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
2152 }
2153
2154 Handle java_lang_reflect_Constructor::create(TRAPS) {
2155 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2156 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
2157 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2158 instanceKlassHandle klass (THREAD, k);
2159 // Ensure it is initialized
2160 klass->initialize(CHECK_NH);
2161 return klass->allocate_instance_handle(CHECK_NH);
2162 }
2163
2164 oop java_lang_reflect_Constructor::clazz(oop reflect) {
2165 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2166 return reflect->obj_field(clazz_offset);
2167 }
2168
2169 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
2170 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2171 reflect->obj_field_put(clazz_offset, value);
2172 }
2173
2174 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
2175 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2176 return constructor->obj_field(parameterTypes_offset);
2177 }
2178
2179 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
2180 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2181 constructor->obj_field_put(parameterTypes_offset, value);
2182 }
2183
2184 oop java_lang_reflect_Constructor::exception_types(oop constructor) {
2185 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2186 return constructor->obj_field(exceptionTypes_offset);
2187 }
2188
2189 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
2190 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2191 constructor->obj_field_put(exceptionTypes_offset, value);
2192 }
2193
2194 int java_lang_reflect_Constructor::slot(oop reflect) {
2195 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2196 return reflect->int_field(slot_offset);
2197 }
2198
2199 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
2200 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2201 reflect->int_field_put(slot_offset, value);
2202 }
2203
2204 int java_lang_reflect_Constructor::modifiers(oop constructor) {
2205 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2206 return constructor->int_field(modifiers_offset);
2207 }
2208
2209 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
2210 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2211 constructor->int_field_put(modifiers_offset, value);
2212 }
2213
2214 bool java_lang_reflect_Constructor::has_signature_field() {
2215 return (signature_offset >= 0);
2216 }
2217
2218 oop java_lang_reflect_Constructor::signature(oop constructor) {
2219 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2220 assert(has_signature_field(), "signature field must be present");
2221 return constructor->obj_field(signature_offset);
2222 }
2223
2224 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
2225 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2226 assert(has_signature_field(), "signature field must be present");
2227 constructor->obj_field_put(signature_offset, value);
2228 }
2229
2230 bool java_lang_reflect_Constructor::has_annotations_field() {
2231 return (annotations_offset >= 0);
2232 }
2233
2234 oop java_lang_reflect_Constructor::annotations(oop constructor) {
2235 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2236 assert(has_annotations_field(), "annotations field must be present");
2237 return constructor->obj_field(annotations_offset);
2238 }
2239
2240 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
2241 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2242 assert(has_annotations_field(), "annotations field must be present");
2243 constructor->obj_field_put(annotations_offset, value);
2244 }
2245
2246 bool java_lang_reflect_Constructor::has_parameter_annotations_field() {
2247 return (parameter_annotations_offset >= 0);
2248 }
2249
2250 oop java_lang_reflect_Constructor::parameter_annotations(oop method) {
2251 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2252 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2253 return method->obj_field(parameter_annotations_offset);
2254 }
2255
2256 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
2257 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2258 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2259 method->obj_field_put(parameter_annotations_offset, value);
2260 }
2261
2262 bool java_lang_reflect_Constructor::has_type_annotations_field() {
2263 return (type_annotations_offset >= 0);
2264 }
2265
2266 oop java_lang_reflect_Constructor::type_annotations(oop constructor) {
2267 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2268 assert(has_type_annotations_field(), "type_annotations field must be present");
2269 return constructor->obj_field(type_annotations_offset);
2270 }
2271
2272 void java_lang_reflect_Constructor::set_type_annotations(oop constructor, oop value) {
2273 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2274 assert(has_type_annotations_field(), "type_annotations field must be present");
2275 constructor->obj_field_put(type_annotations_offset, value);
2276 }
2277
2278 void java_lang_reflect_Field::compute_offsets() {
2279 Klass* k = SystemDictionary::reflect_Field_klass();
2280 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
2281 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2282 compute_offset(type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature());
2283 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
2284 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2285 // The generic signature and annotations fields are only present in 1.5
2286 signature_offset = -1;
2287 annotations_offset = -1;
2288 type_annotations_offset = -1;
2289 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
2290 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
2291 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
2292 }
2293
2294 Handle java_lang_reflect_Field::create(TRAPS) {
2295 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2296 Symbol* name = vmSymbols::java_lang_reflect_Field();
2297 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2298 instanceKlassHandle klass (THREAD, k);
2299 // Ensure it is initialized
2300 klass->initialize(CHECK_NH);
2301 return klass->allocate_instance_handle(CHECK_NH);
2302 }
2303
2304 oop java_lang_reflect_Field::clazz(oop reflect) {
2305 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2306 return reflect->obj_field(clazz_offset);
2307 }
2308
2309 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
2310 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2311 reflect->obj_field_put(clazz_offset, value);
2312 }
2313
2314 oop java_lang_reflect_Field::name(oop field) {
2315 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2316 return field->obj_field(name_offset);
2317 }
2318
2319 void java_lang_reflect_Field::set_name(oop field, oop value) {
2320 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2321 field->obj_field_put(name_offset, value);
2322 }
2323
2324 oop java_lang_reflect_Field::type(oop field) {
2325 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2326 return field->obj_field(type_offset);
2327 }
2328
2329 void java_lang_reflect_Field::set_type(oop field, oop value) {
2330 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2331 field->obj_field_put(type_offset, value);
2332 }
2333
2334 int java_lang_reflect_Field::slot(oop reflect) {
2335 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2336 return reflect->int_field(slot_offset);
2337 }
2338
2339 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
2340 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2341 reflect->int_field_put(slot_offset, value);
2342 }
2343
2344 int java_lang_reflect_Field::modifiers(oop field) {
2345 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2346 return field->int_field(modifiers_offset);
2347 }
2348
2349 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
2350 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2351 field->int_field_put(modifiers_offset, value);
2352 }
2353
2354 bool java_lang_reflect_Field::has_signature_field() {
2355 return (signature_offset >= 0);
2356 }
2357
2358 oop java_lang_reflect_Field::signature(oop field) {
2359 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2360 assert(has_signature_field(), "signature field must be present");
2361 return field->obj_field(signature_offset);
2362 }
2363
2364 void java_lang_reflect_Field::set_signature(oop field, oop value) {
2365 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2366 assert(has_signature_field(), "signature field must be present");
2367 field->obj_field_put(signature_offset, value);
2368 }
2369
2370 bool java_lang_reflect_Field::has_annotations_field() {
2371 return (annotations_offset >= 0);
2372 }
2373
2374 oop java_lang_reflect_Field::annotations(oop field) {
2375 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2376 assert(has_annotations_field(), "annotations field must be present");
2377 return field->obj_field(annotations_offset);
2378 }
2379
2380 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
2381 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2382 assert(has_annotations_field(), "annotations field must be present");
2383 field->obj_field_put(annotations_offset, value);
2384 }
2385
2386 bool java_lang_reflect_Field::has_type_annotations_field() {
2387 return (type_annotations_offset >= 0);
2388 }
2389
2390 oop java_lang_reflect_Field::type_annotations(oop field) {
2391 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2392 assert(has_type_annotations_field(), "type_annotations field must be present");
2393 return field->obj_field(type_annotations_offset);
2394 }
2395
2396 void java_lang_reflect_Field::set_type_annotations(oop field, oop value) {
2397 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2398 assert(has_type_annotations_field(), "type_annotations field must be present");
2399 field->obj_field_put(type_annotations_offset, value);
2400 }
2401
2402 void sun_reflect_ConstantPool::compute_offsets() {
2403 Klass* k = SystemDictionary::reflect_ConstantPool_klass();
2404 // This null test can be removed post beta
2405 if (k != NULL) {
2406 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
2407 compute_offset(_oop_offset, k, vmSymbols::ConstantPool_name(), vmSymbols::object_signature());
2408 }
2409 }
2410
2411 void java_lang_reflect_Parameter::compute_offsets() {
2412 Klass* k = SystemDictionary::reflect_Parameter_klass();
2413 if(NULL != k) {
2414 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2415 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2416 compute_offset(index_offset, k, vmSymbols::index_name(), vmSymbols::int_signature());
2417 compute_offset(executable_offset, k, vmSymbols::executable_name(), vmSymbols::executable_signature());
2418 }
2419 }
2420
2421 Handle java_lang_reflect_Parameter::create(TRAPS) {
2422 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2423 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
2424 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2425 instanceKlassHandle klass (THREAD, k);
2426 // Ensure it is initialized
2427 klass->initialize(CHECK_NH);
2428 return klass->allocate_instance_handle(CHECK_NH);
2429 }
2430
2431 oop java_lang_reflect_Parameter::name(oop param) {
2432 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2433 return param->obj_field(name_offset);
2434 }
2435
2436 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
2437 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2438 param->obj_field_put(name_offset, value);
2439 }
2440
2441 int java_lang_reflect_Parameter::modifiers(oop param) {
2442 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2443 return param->int_field(modifiers_offset);
2444 }
2445
2446 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
2447 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2448 param->int_field_put(modifiers_offset, value);
2449 }
2450
2451 int java_lang_reflect_Parameter::index(oop param) {
2452 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2453 return param->int_field(index_offset);
2454 }
2455
2456 void java_lang_reflect_Parameter::set_index(oop param, int value) {
2457 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2458 param->int_field_put(index_offset, value);
2459 }
2460
2461 oop java_lang_reflect_Parameter::executable(oop param) {
2462 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2463 return param->obj_field(executable_offset);
2464 }
2465
2466 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
2467 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2468 param->obj_field_put(executable_offset, value);
2469 }
2470
2471
2472 Handle sun_reflect_ConstantPool::create(TRAPS) {
2473 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2474 Klass* k = SystemDictionary::reflect_ConstantPool_klass();
2475 instanceKlassHandle klass (THREAD, k);
2476 // Ensure it is initialized
2477 klass->initialize(CHECK_NH);
2478 return klass->allocate_instance_handle(CHECK_NH);
2479 }
2480
2481
2482 void sun_reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
2483 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2484 oop mirror = value->pool_holder()->java_mirror();
2485 // Save the mirror to get back the constant pool.
2486 reflect->obj_field_put(_oop_offset, mirror);
2487 }
2488
2489 ConstantPool* sun_reflect_ConstantPool::get_cp(oop reflect) {
2490 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2491
2492 oop mirror = reflect->obj_field(_oop_offset);
2493 Klass* k = java_lang_Class::as_Klass(mirror);
2494 assert(k->oop_is_instance(), "Must be");
2495
2496 // Get the constant pool back from the klass. Since class redefinition
2497 // merges the new constant pool into the old, this is essentially the
2498 // same constant pool as the original. If constant pool merging is
2499 // no longer done in the future, this will have to change to save
2500 // the original.
2501 return InstanceKlass::cast(k)->constants();
2502 }
2503
2504 void sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
2505 Klass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass();
2506 // This null test can be removed post beta
2507 if (k != NULL) {
2508 compute_offset(_base_offset, k,
2509 vmSymbols::base_name(), vmSymbols::object_signature());
2510 }
2511 }
2512
2513 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
2514 Klass* k = SystemDictionary::box_klass(type);
2515 if (k == NULL) return NULL;
2516 instanceKlassHandle h (THREAD, k);
2517 if (!h->is_initialized()) h->initialize(CHECK_0);
2518 return h->allocate_instance(THREAD);
2519 }
2520
2521
2522 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
2523 oop box = initialize_and_allocate(type, CHECK_0);
2524 if (box == NULL) return NULL;
2525 switch (type) {
2526 case T_BOOLEAN:
2527 box->bool_field_put(value_offset, value->z);
2528 break;
2529 case T_CHAR:
2530 box->char_field_put(value_offset, value->c);
2531 break;
2532 case T_FLOAT:
2533 box->float_field_put(value_offset, value->f);
2534 break;
2535 case T_DOUBLE:
2536 box->double_field_put(long_value_offset, value->d);
2537 break;
2538 case T_BYTE:
2539 box->byte_field_put(value_offset, value->b);
2540 break;
2541 case T_SHORT:
2542 box->short_field_put(value_offset, value->s);
2543 break;
2544 case T_INT:
2545 box->int_field_put(value_offset, value->i);
2546 break;
2547 case T_LONG:
2548 box->long_field_put(long_value_offset, value->j);
2549 break;
2550 default:
2551 return NULL;
2552 }
2553 return box;
2554 }
2555
2556
2557 BasicType java_lang_boxing_object::basic_type(oop box) {
2558 if (box == NULL) return T_ILLEGAL;
2559 BasicType type = SystemDictionary::box_klass_type(box->klass());
2560 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
2561 return T_ILLEGAL;
2562 return type;
2563 }
2564
2565
2566 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
2567 BasicType type = SystemDictionary::box_klass_type(box->klass());
2568 switch (type) {
2569 case T_BOOLEAN:
2570 value->z = box->bool_field(value_offset);
2571 break;
2572 case T_CHAR:
2573 value->c = box->char_field(value_offset);
2574 break;
2575 case T_FLOAT:
2576 value->f = box->float_field(value_offset);
2577 break;
2578 case T_DOUBLE:
2579 value->d = box->double_field(long_value_offset);
2580 break;
2581 case T_BYTE:
2582 value->b = box->byte_field(value_offset);
2583 break;
2584 case T_SHORT:
2585 value->s = box->short_field(value_offset);
2586 break;
2587 case T_INT:
2588 value->i = box->int_field(value_offset);
2589 break;
2590 case T_LONG:
2591 value->j = box->long_field(long_value_offset);
2592 break;
2593 default:
2594 return T_ILLEGAL;
2595 } // end switch
2596 return type;
2597 }
2598
2599
2600 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
2601 BasicType type = SystemDictionary::box_klass_type(box->klass());
2602 switch (type) {
2603 case T_BOOLEAN:
2604 box->bool_field_put(value_offset, value->z);
2605 break;
2606 case T_CHAR:
2607 box->char_field_put(value_offset, value->c);
2608 break;
2609 case T_FLOAT:
2610 box->float_field_put(value_offset, value->f);
2611 break;
2612 case T_DOUBLE:
2613 box->double_field_put(long_value_offset, value->d);
2614 break;
2615 case T_BYTE:
2616 box->byte_field_put(value_offset, value->b);
2617 break;
2618 case T_SHORT:
2619 box->short_field_put(value_offset, value->s);
2620 break;
2621 case T_INT:
2622 box->int_field_put(value_offset, value->i);
2623 break;
2624 case T_LONG:
2625 box->long_field_put(long_value_offset, value->j);
2626 break;
2627 default:
2628 return T_ILLEGAL;
2629 } // end switch
2630 return type;
2631 }
2632
2633
2634 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
2635 switch (type) {
2636 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
2637 case T_CHAR: st->print("%d", value->c); break;
2638 case T_BYTE: st->print("%d", value->b); break;
2639 case T_SHORT: st->print("%d", value->s); break;
2640 case T_INT: st->print("%d", value->i); break;
2641 case T_LONG: st->print(INT64_FORMAT, value->j); break;
2642 case T_FLOAT: st->print("%f", value->f); break;
2643 case T_DOUBLE: st->print("%lf", value->d); break;
2644 default: st->print("type %d?", type); break;
2645 }
2646 }
2647
2648
2649 // Support for java_lang_ref_Reference
2650 HeapWord *java_lang_ref_Reference::pending_list_lock_addr() {
2651 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2652 address addr = ik->static_field_addr(static_lock_offset);
2653 return (HeapWord*) addr;
2654 }
2655
2656 oop java_lang_ref_Reference::pending_list_lock() {
2657 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2658 address addr = ik->static_field_addr(static_lock_offset);
2659 if (UseCompressedOops) {
2660 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
2661 } else {
2662 return oopDesc::load_decode_heap_oop((oop*)addr);
2663 }
2664 }
2665
2666 HeapWord *java_lang_ref_Reference::pending_list_addr() {
2667 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2668 address addr = ik->static_field_addr(static_pending_offset);
2669 // XXX This might not be HeapWord aligned, almost rather be char *.
2670 return (HeapWord*)addr;
2671 }
2672
2673 oop java_lang_ref_Reference::pending_list() {
2674 char *addr = (char *)pending_list_addr();
2675 if (UseCompressedOops) {
2676 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
2677 } else {
2678 return oopDesc::load_decode_heap_oop((oop*)addr);
2679 }
2680 }
2681
2682
2683 // Support for java_lang_ref_SoftReference
2684
2685 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
2686 return ref->long_field(timestamp_offset);
2687 }
2688
2689 jlong java_lang_ref_SoftReference::clock() {
2690 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass());
2691 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
2692 return *offset;
2693 }
2694
2695 void java_lang_ref_SoftReference::set_clock(jlong value) {
2696 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass());
2697 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
2698 *offset = value;
2699 }
2700
2701 // Support for java_lang_invoke_DirectMethodHandle
2702
2703 int java_lang_invoke_DirectMethodHandle::_member_offset;
2704
2705 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
2706 oop member_name = NULL;
2707 bool is_dmh = dmh->is_oop() && java_lang_invoke_DirectMethodHandle::is_instance(dmh);
2708 assert(is_dmh, "a DirectMethodHandle oop is expected");
2709 if (is_dmh) {
2710 member_name = dmh->obj_field(member_offset_in_bytes());
2711 }
2712 return member_name;
2713 }
2714
2715 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
2716 Klass* klass_oop = SystemDictionary::DirectMethodHandle_klass();
2717 if (klass_oop != NULL) {
2718 compute_offset(_member_offset, klass_oop, vmSymbols::member_name(), vmSymbols::java_lang_invoke_MemberName_signature());
2719 }
2720 }
2721
2722 // Support for java_lang_invoke_MethodHandle
2723
2724 int java_lang_invoke_MethodHandle::_type_offset;
2725 int java_lang_invoke_MethodHandle::_form_offset;
2726
2727 int java_lang_invoke_MemberName::_clazz_offset;
2728 int java_lang_invoke_MemberName::_name_offset;
2729 int java_lang_invoke_MemberName::_type_offset;
2730 int java_lang_invoke_MemberName::_flags_offset;
2731 int java_lang_invoke_MemberName::_vmtarget_offset;
2732 int java_lang_invoke_MemberName::_vmloader_offset;
2733 int java_lang_invoke_MemberName::_vmindex_offset;
2734
2735 int java_lang_invoke_LambdaForm::_vmentry_offset;
2736
2737 void java_lang_invoke_MethodHandle::compute_offsets() {
2738 Klass* klass_oop = SystemDictionary::MethodHandle_klass();
2739 if (klass_oop != NULL) {
2740 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::java_lang_invoke_MethodType_signature());
2741 compute_offset(_form_offset, klass_oop, vmSymbols::form_name(), vmSymbols::java_lang_invoke_LambdaForm_signature());
2742 }
2743 }
2744
2745 void java_lang_invoke_MemberName::compute_offsets() {
2746 Klass* klass_oop = SystemDictionary::MemberName_klass();
2747 if (klass_oop != NULL) {
2748 compute_offset(_clazz_offset, klass_oop, vmSymbols::clazz_name(), vmSymbols::class_signature());
2749 compute_offset(_name_offset, klass_oop, vmSymbols::name_name(), vmSymbols::string_signature());
2750 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::object_signature());
2751 compute_offset(_flags_offset, klass_oop, vmSymbols::flags_name(), vmSymbols::int_signature());
2752 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2753 }
2754 }
2755
2756 void java_lang_invoke_LambdaForm::compute_offsets() {
2757 Klass* klass_oop = SystemDictionary::LambdaForm_klass();
2758 if (klass_oop != NULL) {
2759 compute_offset(_vmentry_offset, klass_oop, vmSymbols::vmentry_name(), vmSymbols::java_lang_invoke_MemberName_signature());
2760 }
2761 }
2762
2763 oop java_lang_invoke_MethodHandle::type(oop mh) {
2764 return mh->obj_field(_type_offset);
2765 }
2766
2767 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
2768 mh->obj_field_put(_type_offset, mtype);
2769 }
2770
2771 oop java_lang_invoke_MethodHandle::form(oop mh) {
2772 assert(_form_offset != 0, "");
2773 return mh->obj_field(_form_offset);
2774 }
2775
2776 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
2777 assert(_form_offset != 0, "");
2778 mh->obj_field_put(_form_offset, lform);
2779 }
2780
2781 /// MemberName accessors
2782
2783 oop java_lang_invoke_MemberName::clazz(oop mname) {
2784 assert(is_instance(mname), "wrong type");
2785 return mname->obj_field(_clazz_offset);
2786 }
2787
2788 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
2789 assert(is_instance(mname), "wrong type");
2790 mname->obj_field_put(_clazz_offset, clazz);
2791 }
2792
2793 oop java_lang_invoke_MemberName::name(oop mname) {
2794 assert(is_instance(mname), "wrong type");
2795 return mname->obj_field(_name_offset);
2796 }
2797
2798 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
2799 assert(is_instance(mname), "wrong type");
2800 mname->obj_field_put(_name_offset, name);
2801 }
2802
2803 oop java_lang_invoke_MemberName::type(oop mname) {
2804 assert(is_instance(mname), "wrong type");
2805 return mname->obj_field(_type_offset);
2806 }
2807
2808 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
2809 assert(is_instance(mname), "wrong type");
2810 mname->obj_field_put(_type_offset, type);
2811 }
2812
2813 int java_lang_invoke_MemberName::flags(oop mname) {
2814 assert(is_instance(mname), "wrong type");
2815 return mname->int_field(_flags_offset);
2816 }
2817
2818 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
2819 assert(is_instance(mname), "wrong type");
2820 mname->int_field_put(_flags_offset, flags);
2821 }
2822
2823 Metadata* java_lang_invoke_MemberName::vmtarget(oop mname) {
2824 assert(is_instance(mname), "wrong type");
2825 return (Metadata*)mname->address_field(_vmtarget_offset);
2826 }
2827
2828 #if INCLUDE_JVMTI
2829 // Can be executed on VM thread only
2830 void java_lang_invoke_MemberName::adjust_vmtarget(oop mname, Metadata* ref) {
2831 assert((is_instance(mname) && (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0), "wrong type");
2832 assert(Thread::current()->is_VM_thread(), "not VM thread");
2833 mname->address_field_put(_vmtarget_offset, (address)ref);
2834 }
2835 #endif // INCLUDE_JVMTI
2836
2837 void java_lang_invoke_MemberName::set_vmtarget(oop mname, Metadata* ref) {
2838 assert(is_instance(mname), "wrong type");
2839 // check the type of the vmtarget
2840 oop dependency = NULL;
2841 if (ref != NULL) {
2842 switch (flags(mname) & (MN_IS_METHOD |
2843 MN_IS_CONSTRUCTOR |
2844 MN_IS_FIELD)) {
2845 case MN_IS_METHOD:
2846 case MN_IS_CONSTRUCTOR:
2847 assert(ref->is_method(), "should be a method");
2848 dependency = ((Method*)ref)->method_holder()->java_mirror();
2849 break;
2850 case MN_IS_FIELD:
2851 assert(ref->is_klass(), "should be a class");
2852 dependency = ((Klass*)ref)->java_mirror();
2853 break;
2854 default:
2855 ShouldNotReachHere();
2856 }
2857 }
2858 mname->address_field_put(_vmtarget_offset, (address)ref);
2859 // Add a reference to the loader (actually mirror because anonymous classes will not have
2860 // distinct loaders) to ensure the metadata is kept alive
2861 // This mirror may be different than the one in clazz field.
2862 mname->obj_field_put(_vmloader_offset, dependency);
2863 }
2864
2865 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
2866 assert(is_instance(mname), "wrong type");
2867 return (intptr_t) mname->address_field(_vmindex_offset);
2868 }
2869
2870 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
2871 assert(is_instance(mname), "wrong type");
2872 mname->address_field_put(_vmindex_offset, (address) index);
2873 }
2874
2875 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
2876 assert(is_instance(lform), "wrong type");
2877 return lform->obj_field(_vmentry_offset);
2878 }
2879
2880
2881 // Support for java_lang_invoke_MethodType
2882
2883 int java_lang_invoke_MethodType::_rtype_offset;
2884 int java_lang_invoke_MethodType::_ptypes_offset;
2885
2886 void java_lang_invoke_MethodType::compute_offsets() {
2887 Klass* k = SystemDictionary::MethodType_klass();
2888 if (k != NULL) {
2889 compute_offset(_rtype_offset, k, vmSymbols::rtype_name(), vmSymbols::class_signature());
2890 compute_offset(_ptypes_offset, k, vmSymbols::ptypes_name(), vmSymbols::class_array_signature());
2891 }
2892 }
2893
2894 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
2895 st->print("(");
2896 objArrayOop pts = ptypes(mt);
2897 for (int i = 0, limit = pts->length(); i < limit; i++) {
2898 java_lang_Class::print_signature(pts->obj_at(i), st);
2899 }
2900 st->print(")");
2901 java_lang_Class::print_signature(rtype(mt), st);
2902 }
2903
2904 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) {
2905 ResourceMark rm;
2906 stringStream buffer(128);
2907 print_signature(mt, &buffer);
2908 const char* sigstr = buffer.base();
2909 int siglen = (int) buffer.size();
2910 Symbol *name;
2911 if (!intern_if_not_found) {
2912 name = SymbolTable::probe(sigstr, siglen);
2913 } else {
2914 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
2915 }
2916 return name;
2917 }
2918
2919 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
2920 if (mt1 == mt2)
2921 return true;
2922 if (rtype(mt1) != rtype(mt2))
2923 return false;
2924 if (ptype_count(mt1) != ptype_count(mt2))
2925 return false;
2926 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
2927 if (ptype(mt1, i) != ptype(mt2, i))
2928 return false;
2929 }
2930 return true;
2931 }
2932
2933 oop java_lang_invoke_MethodType::rtype(oop mt) {
2934 assert(is_instance(mt), "must be a MethodType");
2935 return mt->obj_field(_rtype_offset);
2936 }
2937
2938 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
2939 assert(is_instance(mt), "must be a MethodType");
2940 return (objArrayOop) mt->obj_field(_ptypes_offset);
2941 }
2942
2943 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
2944 return ptypes(mt)->obj_at(idx);
2945 }
2946
2947 int java_lang_invoke_MethodType::ptype_count(oop mt) {
2948 return ptypes(mt)->length();
2949 }
2950
2951 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
2952 objArrayOop pts = ptypes(mt);
2953 int count = pts->length();
2954 int slots = 0;
2955 for (int i = 0; i < count; i++) {
2956 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
2957 slots += type2size[bt];
2958 }
2959 return slots;
2960 }
2961
2962 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
2963 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
2964 return type2size[bt];
2965 }
2966
2967
2968 // Support for java_lang_invoke_CallSite
2969
2970 int java_lang_invoke_CallSite::_target_offset;
2971
2972 void java_lang_invoke_CallSite::compute_offsets() {
2973 Klass* k = SystemDictionary::CallSite_klass();
2974 if (k != NULL) {
2975 compute_offset(_target_offset, k, vmSymbols::target_name(), vmSymbols::java_lang_invoke_MethodHandle_signature());
2976 }
2977 }
2978
2979
2980 // Support for java_security_AccessControlContext
2981
2982 int java_security_AccessControlContext::_context_offset = 0;
2983 int java_security_AccessControlContext::_privilegedContext_offset = 0;
2984 int java_security_AccessControlContext::_isPrivileged_offset = 0;
2985 int java_security_AccessControlContext::_isAuthorized_offset = -1;
2986
2987 void java_security_AccessControlContext::compute_offsets() {
2988 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
2989 fieldDescriptor fd;
2990 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass());
2991
2992 if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) {
2993 fatal("Invalid layout of java.security.AccessControlContext");
2994 }
2995 _context_offset = fd.offset();
2996
2997 if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) {
2998 fatal("Invalid layout of java.security.AccessControlContext");
2999 }
3000 _privilegedContext_offset = fd.offset();
3001
3002 if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) {
3003 fatal("Invalid layout of java.security.AccessControlContext");
3004 }
3005 _isPrivileged_offset = fd.offset();
3006
3007 // The offset may not be present for bootstrapping with older JDK.
3008 if (ik->find_local_field(vmSymbols::isAuthorized_name(), vmSymbols::bool_signature(), &fd)) {
3009 _isAuthorized_offset = fd.offset();
3010 }
3011 }
3012
3013
3014 bool java_security_AccessControlContext::is_authorized(Handle context) {
3015 assert(context.not_null() && context->klass() == SystemDictionary::AccessControlContext_klass(), "Invalid type");
3016 assert(_isAuthorized_offset != -1, "should be set");
3017 return context->bool_field(_isAuthorized_offset) != 0;
3018 }
3019
3020 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
3021 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
3022 // Ensure klass is initialized
3023 InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->initialize(CHECK_0);
3024 // Allocate result
3025 oop result = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->allocate_instance(CHECK_0);
3026 // Fill in values
3027 result->obj_field_put(_context_offset, context());
3028 result->obj_field_put(_privilegedContext_offset, privileged_context());
3029 result->bool_field_put(_isPrivileged_offset, isPrivileged);
3030 // whitelist AccessControlContexts created by the JVM if present
3031 if (_isAuthorized_offset != -1) {
3032 result->bool_field_put(_isAuthorized_offset, true);
3033 }
3034 return result;
3035 }
3036
3037
3038 // Support for java_lang_ClassLoader
3039
3040 bool java_lang_ClassLoader::offsets_computed = false;
3041 int java_lang_ClassLoader::_loader_data_offset = -1;
3042 int java_lang_ClassLoader::parallelCapable_offset = -1;
3043
3044 ClassLoaderData** java_lang_ClassLoader::loader_data_addr(oop loader) {
3045 assert(loader != NULL && loader->is_oop(), "loader must be oop");
3046 return (ClassLoaderData**) loader->address_field_addr(_loader_data_offset);
3047 }
3048
3049 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
3050 return *java_lang_ClassLoader::loader_data_addr(loader);
3051 }
3052
3053 void java_lang_ClassLoader::compute_offsets() {
3054 assert(!offsets_computed, "offsets should be initialized only once");
3055 offsets_computed = true;
3056
3057 // The field indicating parallelCapable (parallelLockMap) is only present starting in 7,
3058 Klass* k1 = SystemDictionary::ClassLoader_klass();
3059 compute_optional_offset(parallelCapable_offset,
3060 k1, vmSymbols::parallelCapable_name(), vmSymbols::concurrenthashmap_signature());
3061
3062 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3063 }
3064
3065 oop java_lang_ClassLoader::parent(oop loader) {
3066 assert(is_instance(loader), "loader must be oop");
3067 return loader->obj_field(parent_offset);
3068 }
3069
3070 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
3071 assert(is_instance(loader), "loader must be oop");
3072 assert(cl == NULL || is_instance(cl), "cl argument must be oop");
3073 oop acl = loader;
3074 debug_only(jint loop_count = 0);
3075 // This loop taken verbatim from ClassLoader.java:
3076 do {
3077 acl = parent(acl);
3078 if (cl == acl) {
3079 return true;
3080 }
3081 assert(++loop_count > 0, "loop_count overflow");
3082 } while (acl != NULL);
3083 return false;
3084 }
3085
3086
3087 // For class loader classes, parallelCapable defined
3088 // based on non-null field
3089 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
3090 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
3091 if (parallelCapable_offset == -1) {
3092 // Default for backward compatibility is false
3093 return false;
3094 }
3095 return (class_loader->obj_field(parallelCapable_offset) != NULL);
3096 }
3097
3098 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
3099 // Fix for 4474172; see evaluation for more details
3100 loader = non_reflection_class_loader(loader);
3101
3102 oop cl = SystemDictionary::java_system_loader();
3103 while(cl != NULL) {
3104 if (cl == loader) return true;
3105 cl = parent(cl);
3106 }
3107 return false;
3108 }
3109
3110 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
3111 if (loader != NULL) {
3112 // See whether this is one of the class loaders associated with
3113 // the generated bytecodes for reflection, and if so, "magically"
3114 // delegate to its parent to prevent class loading from occurring
3115 // in places where applications using reflection didn't expect it.
3116 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass();
3117 // This might be null in non-1.4 JDKs
3118 if (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)) {
3119 return parent(loader);
3120 }
3121 }
3122 return loader;
3123 }
3124
3125
3126 // Support for java_lang_System
3127 int java_lang_System::in_offset_in_bytes() {
3128 return (InstanceMirrorKlass::offset_of_static_fields() + static_in_offset);
3129 }
3130
3131
3132 int java_lang_System::out_offset_in_bytes() {
3133 return (InstanceMirrorKlass::offset_of_static_fields() + static_out_offset);
3134 }
3135
3136
3137 int java_lang_System::err_offset_in_bytes() {
3138 return (InstanceMirrorKlass::offset_of_static_fields() + static_err_offset);
3139 }
3140
3141
3142 bool java_lang_System::has_security_manager() {
3143 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::System_klass());
3144 address addr = ik->static_field_addr(static_security_offset);
3145 if (UseCompressedOops) {
3146 return oopDesc::load_decode_heap_oop((narrowOop *)addr) != NULL;
3147 } else {
3148 return oopDesc::load_decode_heap_oop((oop*)addr) != NULL;
3149 }
3150 }
3151
3152 int java_lang_Class::_klass_offset;
3153 int java_lang_Class::_array_klass_offset;
3154 int java_lang_Class::_oop_size_offset;
3155 int java_lang_Class::_static_oop_field_count_offset;
3156 int java_lang_Class::_class_loader_offset;
3157 int java_lang_Class::_protection_domain_offset;
3158 int java_lang_Class::_component_mirror_offset;
3159 int java_lang_Class::_init_lock_offset;
3160 int java_lang_Class::_signers_offset;
3161 int java_lang_Class::_classData_offset;
3162
3163 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL;
3164
3165 int java_lang_Throwable::backtrace_offset;
3166 int java_lang_Throwable::detailMessage_offset;
3167 int java_lang_Throwable::cause_offset;
3168 int java_lang_Throwable::stackTrace_offset;
3169 int java_lang_Throwable::static_unassigned_stacktrace_offset;
3170
3171 int java_lang_reflect_AccessibleObject::override_offset;
3172
3173 int java_lang_reflect_Method::clazz_offset;
3174 int java_lang_reflect_Method::name_offset;
3175 int java_lang_reflect_Method::returnType_offset;
3176 int java_lang_reflect_Method::parameterTypes_offset;
3177 int java_lang_reflect_Method::exceptionTypes_offset;
3178 int java_lang_reflect_Method::slot_offset;
3179 int java_lang_reflect_Method::modifiers_offset;
3180 int java_lang_reflect_Method::signature_offset;
3181 int java_lang_reflect_Method::annotations_offset;
3182 int java_lang_reflect_Method::parameter_annotations_offset;
3183 int java_lang_reflect_Method::annotation_default_offset;
3184 int java_lang_reflect_Method::type_annotations_offset;
3185
3186 int java_lang_reflect_Constructor::clazz_offset;
3187 int java_lang_reflect_Constructor::parameterTypes_offset;
3188 int java_lang_reflect_Constructor::exceptionTypes_offset;
3189 int java_lang_reflect_Constructor::slot_offset;
3190 int java_lang_reflect_Constructor::modifiers_offset;
3191 int java_lang_reflect_Constructor::signature_offset;
3192 int java_lang_reflect_Constructor::annotations_offset;
3193 int java_lang_reflect_Constructor::parameter_annotations_offset;
3194 int java_lang_reflect_Constructor::type_annotations_offset;
3195
3196 int java_lang_reflect_Field::clazz_offset;
3197 int java_lang_reflect_Field::name_offset;
3198 int java_lang_reflect_Field::type_offset;
3199 int java_lang_reflect_Field::slot_offset;
3200 int java_lang_reflect_Field::modifiers_offset;
3201 int java_lang_reflect_Field::signature_offset;
3202 int java_lang_reflect_Field::annotations_offset;
3203 int java_lang_reflect_Field::type_annotations_offset;
3204
3205 int java_lang_reflect_Parameter::name_offset;
3206 int java_lang_reflect_Parameter::modifiers_offset;
3207 int java_lang_reflect_Parameter::index_offset;
3208 int java_lang_reflect_Parameter::executable_offset;
3209
3210 int java_lang_boxing_object::value_offset;
3211 int java_lang_boxing_object::long_value_offset;
3212
3213 int java_lang_ref_Reference::referent_offset;
3214 int java_lang_ref_Reference::queue_offset;
3215 int java_lang_ref_Reference::next_offset;
3216 int java_lang_ref_Reference::discovered_offset;
3217 int java_lang_ref_Reference::static_lock_offset;
3218 int java_lang_ref_Reference::static_pending_offset;
3219 int java_lang_ref_Reference::number_of_fake_oop_fields;
3220
3221 int java_lang_ref_SoftReference::timestamp_offset;
3222 int java_lang_ref_SoftReference::static_clock_offset;
3223
3224 int java_lang_ClassLoader::parent_offset;
3225
3226 int java_lang_System::static_in_offset;
3227 int java_lang_System::static_out_offset;
3228 int java_lang_System::static_err_offset;
3229 int java_lang_System::static_security_offset;
3230
3231 int java_lang_StackTraceElement::declaringClass_offset;
3232 int java_lang_StackTraceElement::methodName_offset;
3233 int java_lang_StackTraceElement::fileName_offset;
3234 int java_lang_StackTraceElement::lineNumber_offset;
3235
3236 int java_lang_AssertionStatusDirectives::classes_offset;
3237 int java_lang_AssertionStatusDirectives::classEnabled_offset;
3238 int java_lang_AssertionStatusDirectives::packages_offset;
3239 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
3240 int java_lang_AssertionStatusDirectives::deflt_offset;
3241
3242 int java_nio_Buffer::_limit_offset;
3243
3244 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0;
3245
3246 int sun_reflect_ConstantPool::_oop_offset;
3247
3248 int sun_reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
3249
3250
3251 // Support for java_lang_StackTraceElement
3252
3253 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
3254 element->obj_field_put(fileName_offset, value);
3255 }
3256
3257 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
3258 element->obj_field_put(declaringClass_offset, value);
3259 }
3260
3261 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
3262 element->obj_field_put(methodName_offset, value);
3263 }
3264
3265 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
3266 element->int_field_put(lineNumber_offset, value);
3267 }
3268
3269
3270 // Support for java Assertions - java_lang_AssertionStatusDirectives.
3271
3272 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
3273 o->obj_field_put(classes_offset, val);
3274 }
3275
3276 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
3277 o->obj_field_put(classEnabled_offset, val);
3278 }
3279
3280 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
3281 o->obj_field_put(packages_offset, val);
3282 }
3283
3284 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
3285 o->obj_field_put(packageEnabled_offset, val);
3286 }
3287
3288 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
3289 o->bool_field_put(deflt_offset, val);
3290 }
3291
3292
3293 // Support for intrinsification of java.nio.Buffer.checkIndex
3294 int java_nio_Buffer::limit_offset() {
3295 return _limit_offset;
3296 }
3297
3298
3299 void java_nio_Buffer::compute_offsets() {
3300 Klass* k = SystemDictionary::nio_Buffer_klass();
3301 assert(k != NULL, "must be loaded in 1.4+");
3302 compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature());
3303 }
3304
3305 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) {
3306 if (_owner_offset != 0) return;
3307
3308 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK);
3309 Klass* k = SystemDictionary::abstract_ownable_synchronizer_klass();
3310 compute_offset(_owner_offset, k,
3311 vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature());
3312 }
3313
3314 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
3315 assert(_owner_offset != 0, "Must be initialized");
3316 return obj->obj_field(_owner_offset);
3317 }
3318
3319 // Compute hard-coded offsets
3320 // Invoked before SystemDictionary::initialize, so pre-loaded classes
3321 // are not available to determine the offset_of_static_fields.
3322 void JavaClasses::compute_hard_coded_offsets() {
3323 const int x = heapOopSize;
3324 const int header = instanceOopDesc::base_offset_in_bytes();
3325
3326 // Throwable Class
3327 java_lang_Throwable::backtrace_offset = java_lang_Throwable::hc_backtrace_offset * x + header;
3328 java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header;
3329 java_lang_Throwable::cause_offset = java_lang_Throwable::hc_cause_offset * x + header;
3330 java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header;
3331 java_lang_Throwable::static_unassigned_stacktrace_offset = java_lang_Throwable::hc_static_unassigned_stacktrace_offset * x;
3332
3333 // java_lang_boxing_object
3334 java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header;
3335 java_lang_boxing_object::long_value_offset = align_size_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong);
3336
3337 // java_lang_ref_Reference:
3338 java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header;
3339 java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header;
3340 java_lang_ref_Reference::next_offset = java_lang_ref_Reference::hc_next_offset * x + header;
3341 java_lang_ref_Reference::discovered_offset = java_lang_ref_Reference::hc_discovered_offset * x + header;
3342 java_lang_ref_Reference::static_lock_offset = java_lang_ref_Reference::hc_static_lock_offset * x;
3343 java_lang_ref_Reference::static_pending_offset = java_lang_ref_Reference::hc_static_pending_offset * x;
3344 // Artificial fields for java_lang_ref_Reference
3345 // The first field is for the discovered field added in 1.4
3346 java_lang_ref_Reference::number_of_fake_oop_fields = 1;
3347
3348 // java_lang_ref_SoftReference Class
3349 java_lang_ref_SoftReference::timestamp_offset = align_size_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong);
3350 // Don't multiply static fields because they are always in wordSize units
3351 java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x;
3352
3353 // java_lang_ClassLoader
3354 java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header;
3355
3356 // java_lang_System
3357 java_lang_System::static_in_offset = java_lang_System::hc_static_in_offset * x;
3358 java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x;
3359 java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x;
3360 java_lang_System::static_security_offset = java_lang_System::hc_static_security_offset * x;
3361
3362 // java_lang_StackTraceElement
3363 java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset * x + header;
3364 java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header;
3365 java_lang_StackTraceElement::fileName_offset = java_lang_StackTraceElement::hc_fileName_offset * x + header;
3366 java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header;
3367 java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header;
3368 java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header;
3369 java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header;
3370 java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header;
3371 java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header;
3372
3373 }
3374
3375
3376 // Compute non-hard-coded field offsets of all the classes in this file
3377 void JavaClasses::compute_offsets() {
3378 // java_lang_Class::compute_offsets was called earlier in bootstrap
3379 java_lang_Class_ClassData::compute_offsets();
3380 java_lang_ClassLoader::compute_offsets();
3381 java_lang_Thread::compute_offsets();
3382 java_lang_ThreadGroup::compute_offsets();
3383 java_lang_invoke_MethodHandle::compute_offsets();
3384 java_lang_invoke_DirectMethodHandle::compute_offsets();
3385 java_lang_invoke_MemberName::compute_offsets();
3386 java_lang_invoke_LambdaForm::compute_offsets();
3387 java_lang_invoke_MethodType::compute_offsets();
3388 java_lang_invoke_CallSite::compute_offsets();
3389 java_security_AccessControlContext::compute_offsets();
3390 // Initialize reflection classes. The layouts of these classes
3391 // changed with the new reflection implementation in JDK 1.4, and
3392 // since the Universe doesn't know what JDK version it is until this
3393 // point we defer computation of these offsets until now.
3394 java_lang_reflect_AccessibleObject::compute_offsets();
3395 java_lang_reflect_Method::compute_offsets();
3396 java_lang_reflect_Constructor::compute_offsets();
3397 java_lang_reflect_Field::compute_offsets();
3398 java_nio_Buffer::compute_offsets();
3399 sun_reflect_ConstantPool::compute_offsets();
3400 sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets();
3401 java_lang_reflect_Parameter::compute_offsets();
3402
3403 // generated interpreter code wants to know about the offsets we just computed:
3404 AbstractAssembler::update_delayed_values();
3405 }
3406
3407 #ifndef PRODUCT
3408
3409 // These functions exist to assert the validity of hard-coded field offsets to guard
3410 // against changes in the class files
3411
3412 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, 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("Nonstatic field %s.%s not found", klass_name, field_name);
3422 return false;
3423 }
3424 if (fd.is_static()) {
3425 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
3426 return false;
3427 }
3428 if (fd.offset() == hardcoded_offset ) {
3429 return true;
3430 } else {
3431 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
3432 klass_name, field_name, hardcoded_offset, fd.offset());
3433 return false;
3434 }
3435 }
3436
3437
3438 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
3439 EXCEPTION_MARK;
3440 fieldDescriptor fd;
3441 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3442 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3443 instanceKlassHandle h_klass (THREAD, k);
3444 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3445 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3446 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3447 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3448 return false;
3449 }
3450 if (!fd.is_static()) {
3451 tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name);
3452 return false;
3453 }
3454 if (fd.offset() == hardcoded_offset + InstanceMirrorKlass::offset_of_static_fields()) {
3455 return true;
3456 } else {
3457 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());
3458 return false;
3459 }
3460 }
3461
3462
3463 bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) {
3464 EXCEPTION_MARK;
3465 fieldDescriptor fd;
3466 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3467 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3468 instanceKlassHandle h_klass (THREAD, k);
3469 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3470 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3471 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3472 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3473 return false;
3474 }
3475 if (!fd.is_static() || !fd.has_initial_value()) {
3476 tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name);
3477 return false;
3478 }
3479 if (!fd.initial_value_tag().is_int()) {
3480 tty->print_cr("Static field %s.%s is not an int", klass_name, field_name);
3481 return false;
3482 }
3483 jint field_value = fd.int_initial_value();
3484 if (field_value == hardcoded_constant) {
3485 return true;
3486 } else {
3487 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);
3488 return false;
3489 }
3490 }
3491
3492
3493 // Check the hard-coded field offsets of all the classes in this file
3494
3495 void JavaClasses::check_offsets() {
3496 bool valid = true;
3497 HandleMark hm;
3498
3499 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3500 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
3501
3502 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3503 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
3504
3505 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3506 valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig)
3507
3508 #define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \
3509 valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig)
3510
3511 // java.lang.String
3512
3513 CHECK_OFFSET("java/lang/String", java_lang_String, value, "[C");
3514 if (java_lang_String::has_offset_field()) {
3515 CHECK_OFFSET("java/lang/String", java_lang_String, offset, "I");
3516 CHECK_OFFSET("java/lang/String", java_lang_String, count, "I");
3517 }
3518 if (java_lang_String::has_hash_field()) {
3519 CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I");
3520 }
3521
3522 // java.lang.Class
3523
3524 // Fake fields
3525 // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked
3526 // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked
3527
3528 // java.lang.Throwable
3529
3530 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;");
3531 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;");
3532 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, cause, "Ljava/lang/Throwable;");
3533 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;");
3534
3535 // Boxed primitive objects (java_lang_boxing_object)
3536
3537 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
3538 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
3539 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
3540 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
3541 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
3542 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
3543 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
3544 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
3545
3546 // java.lang.ClassLoader
3547
3548 CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent, "Ljava/lang/ClassLoader;");
3549
3550 // java.lang.System
3551
3552 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, in, "Ljava/io/InputStream;");
3553 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;");
3554 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;");
3555 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, security, "Ljava/lang/SecurityManager;");
3556
3557 // java.lang.StackTraceElement
3558
3559 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;");
3560 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;");
3561 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, fileName, "Ljava/lang/String;");
3562 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I");
3563
3564 // java.lang.ref.Reference
3565
3566 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
3567 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
3568 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
3569 // Fake field
3570 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
3571 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, lock, "Ljava/lang/ref/Reference$Lock;");
3572 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, pending, "Ljava/lang/ref/Reference;");
3573
3574 // java.lang.ref.SoftReference
3575
3576 CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J");
3577 CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J");
3578
3579 // java.lang.AssertionStatusDirectives
3580 //
3581 // The CheckAssertionStatusDirectives boolean can be removed from here and
3582 // globals.hpp after the AssertionStatusDirectives class has been integrated
3583 // into merlin "for some time." Without it, the vm will fail with early
3584 // merlin builds.
3585
3586 if (CheckAssertionStatusDirectives) {
3587 const char* nm = "java/lang/AssertionStatusDirectives";
3588 const char* sig = "[Ljava/lang/String;";
3589 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig);
3590 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z");
3591 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig);
3592 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z");
3593 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z");
3594 }
3595
3596 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
3597 }
3598
3599 #endif // PRODUCT
3600
3601 int InjectedField::compute_offset() {
3602 Klass* klass_oop = klass();
3603 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
3604 if (!may_be_java && !fs.access_flags().is_internal()) {
3605 // Only look at injected fields
3606 continue;
3607 }
3608 if (fs.name() == name() && fs.signature() == signature()) {
3609 return fs.offset();
3610 }
3611 }
3612 ResourceMark rm;
3613 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)" : "");
3614 #ifndef PRODUCT
3615 klass_oop->print();
3616 tty->print_cr("all fields:");
3617 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
3618 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
3619 }
3620 #endif //PRODUCT
3621 fatal("Invalid layout of preloaded class");
3622 return -1;
3623 }
3624
3625 void javaClasses_init() {
3626 JavaClasses::compute_offsets();
3627 JavaClasses::check_offsets();
3628 FilteredFieldsMap::initialize(); // must be done after computing offsets.
3629 }