1 /*
2 * Copyright (c) 1997, 2015, 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.inline.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/objArrayOop.inline.hpp"
43 #include "oops/oop.inline.hpp"
44 #include "oops/symbol.hpp"
45 #include "oops/typeArrayOop.hpp"
46 #include "prims/jvmtiRedefineClassesTrace.hpp"
47 #include "runtime/fieldDescriptor.hpp"
48 #include "runtime/handles.inline.hpp"
49 #include "runtime/interfaceSupport.hpp"
50 #include "runtime/java.hpp"
51 #include "runtime/javaCalls.hpp"
52 #include "runtime/safepoint.hpp"
53 #include "runtime/thread.inline.hpp"
54 #include "runtime/vframe.hpp"
55 #include "utilities/preserveException.hpp"
56
57 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
58
59 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \
60 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum);
61
62 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \
63 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java },
64
65 InjectedField JavaClasses::_injected_fields[] = {
66 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
67 };
68
69 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
70 return _injected_fields[id].compute_offset();
71 }
72
73
74 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
75 *field_count = 0;
76
77 vmSymbols::SID sid = vmSymbols::find_sid(class_name);
78 if (sid == vmSymbols::NO_SID) {
79 // Only well known classes can inject fields
80 return NULL;
81 }
82
83 int count = 0;
84 int start = -1;
85
86 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
87 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \
88 count++; \
89 if (start == -1) start = klass##_##name##_enum; \
90 }
91 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
92 #undef LOOKUP_INJECTED_FIELD
93
94 if (start != -1) {
95 *field_count = count;
96 return _injected_fields + start;
97 }
98 return NULL;
99 }
100
101
102 static bool find_field(InstanceKlass* ik,
103 Symbol* name_symbol, Symbol* signature_symbol,
104 fieldDescriptor* fd,
105 bool is_static = false, bool allow_super = false) {
106 if (allow_super || is_static) {
107 return ik->find_field(name_symbol, signature_symbol, is_static, fd) != NULL;
108 } else {
109 return ik->find_local_field(name_symbol, signature_symbol, fd);
110 }
111 }
112
113 // Helpful routine for computing field offsets at run time rather than hardcoding them
114 static void
115 compute_offset(int &dest_offset,
116 Klass* klass_oop, Symbol* name_symbol, Symbol* signature_symbol,
117 bool is_static = false, bool allow_super = false) {
118 fieldDescriptor fd;
119 InstanceKlass* ik = InstanceKlass::cast(klass_oop);
120 if (!find_field(ik, name_symbol, signature_symbol, &fd, is_static, allow_super)) {
121 ResourceMark rm;
122 tty->print_cr("Invalid layout of %s at %s", ik->external_name(), name_symbol->as_C_string());
123 #ifndef PRODUCT
124 klass_oop->print();
125 tty->print_cr("all fields:");
126 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
127 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
128 }
129 #endif //PRODUCT
130 vm_exit_during_initialization("Invalid layout of preloaded class: use -XX:+TraceClassLoading to see the origin of the problem class");
131 }
132 dest_offset = fd.offset();
133 }
134
135 // Same as above but for "optional" offsets that might not be present in certain JDK versions
136 static void
137 compute_optional_offset(int& dest_offset,
138 Klass* klass_oop, Symbol* name_symbol, Symbol* signature_symbol,
139 bool allow_super = false) {
140 fieldDescriptor fd;
141 InstanceKlass* ik = InstanceKlass::cast(klass_oop);
142 if (find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) {
143 dest_offset = fd.offset();
144 }
145 }
146
147
148 int java_lang_String::value_offset = 0;
149 int java_lang_String::offset_offset = 0;
150 int java_lang_String::count_offset = 0;
151 int java_lang_String::hash_offset = 0;
152
153 bool java_lang_String::initialized = false;
154
155 bool java_lang_String::is_instance(oop obj) {
156 return is_instance_inlined(obj);
157 }
158
159 void java_lang_String::compute_offsets() {
160 assert(!initialized, "offsets should be initialized only once");
161
162 Klass* k = SystemDictionary::String_klass();
163 compute_offset(value_offset, k, vmSymbols::value_name(), vmSymbols::char_array_signature());
164 compute_optional_offset(offset_offset, k, vmSymbols::offset_name(), vmSymbols::int_signature());
165 compute_optional_offset(count_offset, k, vmSymbols::count_name(), vmSymbols::int_signature());
166 compute_optional_offset(hash_offset, k, vmSymbols::hash_name(), vmSymbols::int_signature());
167
168 initialized = true;
169 }
170
171 Handle java_lang_String::basic_create(int length, TRAPS) {
172 assert(initialized, "Must be initialized");
173 // Create the String object first, so there's a chance that the String
174 // and the char array it points to end up in the same cache line.
175 oop obj;
176 obj = InstanceKlass::cast(SystemDictionary::String_klass())->allocate_instance(CHECK_NH);
177
178 // Create the char array. The String object must be handlized here
179 // because GC can happen as a result of the allocation attempt.
180 Handle h_obj(THREAD, obj);
181 typeArrayOop buffer;
182 buffer = oopFactory::new_charArray(length, CHECK_NH);
183
184 // Point the String at the char array
185 obj = h_obj();
186 set_value(obj, buffer);
187 // No need to zero the offset, allocation zero'ed the entire String object
188 assert(offset(obj) == 0, "initial String offset should be zero");
189 //set_offset(obj, 0);
190 set_count(obj, length);
191
192 return h_obj;
193 }
194
195 Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) {
196 Handle h_obj = basic_create(length, CHECK_NH);
197 typeArrayOop buffer = value(h_obj());
198 for (int index = 0; index < length; index++) {
199 buffer->char_at_put(index, unicode[index]);
200 }
201 return h_obj;
202 }
203
204 oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) {
205 Handle h_obj = create_from_unicode(unicode, length, CHECK_0);
206 return h_obj();
207 }
208
209 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
210 if (utf8_str == NULL) {
211 return Handle();
212 }
213 int length = UTF8::unicode_length(utf8_str);
214 Handle h_obj = basic_create(length, CHECK_NH);
215 if (length > 0) {
216 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
217 }
218 return h_obj;
219 }
220
221 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
222 Handle h_obj = create_from_str(utf8_str, CHECK_0);
223 return h_obj();
224 }
225
226 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) {
227 int length = UTF8::unicode_length((char*)symbol->bytes(), symbol->utf8_length());
228 Handle h_obj = basic_create(length, CHECK_NH);
229 if (length > 0) {
230 UTF8::convert_to_unicode((char*)symbol->bytes(), value(h_obj())->char_at_addr(0), length);
231 }
232 return h_obj;
233 }
234
235 // Converts a C string to a Java String based on current encoding
236 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
237 assert(str != NULL, "bad arguments");
238
239 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *);
240 static to_java_string_fn_t _to_java_string_fn = NULL;
241
242 if (_to_java_string_fn == NULL) {
243 void *lib_handle = os::native_java_library();
244 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform"));
245 if (_to_java_string_fn == NULL) {
246 fatal("NewStringPlatform missing");
247 }
248 }
249
250 jstring js = NULL;
251 { JavaThread* thread = (JavaThread*)THREAD;
252 assert(thread->is_Java_thread(), "must be java thread");
253 HandleMark hm(thread);
254 ThreadToNativeFromVM ttn(thread);
255 js = (_to_java_string_fn)(thread->jni_environment(), str);
256 }
257 return Handle(THREAD, JNIHandles::resolve(js));
258 }
259
260 // Converts a Java String to a native C string that can be used for
261 // native OS calls.
262 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
263
264 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
265 static to_platform_string_fn_t _to_platform_string_fn = NULL;
266
267 if (_to_platform_string_fn == NULL) {
268 void *lib_handle = os::native_java_library();
269 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
270 if (_to_platform_string_fn == NULL) {
271 fatal("GetStringPlatformChars missing");
272 }
273 }
274
275 char *native_platform_string;
276 { JavaThread* thread = (JavaThread*)THREAD;
277 assert(thread->is_Java_thread(), "must be java thread");
278 JNIEnv *env = thread->jni_environment();
279 jstring js = (jstring) JNIHandles::make_local(env, java_string());
280 bool is_copy;
281 HandleMark hm(thread);
282 ThreadToNativeFromVM ttn(thread);
283 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
284 assert(is_copy == JNI_TRUE, "is_copy value changed");
285 JNIHandles::destroy_local(js);
286 }
287 return native_platform_string;
288 }
289
290 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) {
291 oop obj = java_string();
292 // Typical usage is to convert all '/' to '.' in string.
293 typeArrayOop value = java_lang_String::value(obj);
294 int offset = java_lang_String::offset(obj);
295 int length = java_lang_String::length(obj);
296
297 // First check if any from_char exist
298 int index; // Declared outside, used later
299 for (index = 0; index < length; index++) {
300 if (value->char_at(index + offset) == from_char) {
301 break;
302 }
303 }
304 if (index == length) {
305 // No from_char, so do not copy.
306 return java_string;
307 }
308
309 // Create new UNICODE buffer. Must handlize value because GC
310 // may happen during String and char array creation.
311 typeArrayHandle h_value(THREAD, value);
312 Handle string = basic_create(length, CHECK_NH);
313
314 typeArrayOop from_buffer = h_value();
315 typeArrayOop to_buffer = java_lang_String::value(string());
316
317 // Copy contents
318 for (index = 0; index < length; index++) {
319 jchar c = from_buffer->char_at(index + offset);
320 if (c == from_char) {
321 c = to_char;
322 }
323 to_buffer->char_at_put(index, c);
324 }
325 return string;
326 }
327
328 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
329 typeArrayOop value = java_lang_String::value(java_string);
330 int offset = java_lang_String::offset(java_string);
331 length = java_lang_String::length(java_string);
332
333 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
334 if (result != NULL) {
335 for (int index = 0; index < length; index++) {
336 result[index] = value->char_at(index + offset);
337 }
338 } else {
339 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
340 }
341 return result;
342 }
343
344 unsigned int java_lang_String::hash_code(oop java_string) {
345 int length = java_lang_String::length(java_string);
346 // Zero length string will hash to zero with String.hashCode() function.
347 if (length == 0) return 0;
348
349 typeArrayOop value = java_lang_String::value(java_string);
350 int offset = java_lang_String::offset(java_string);
351 return java_lang_String::hash_code(value->char_at_addr(offset), length);
352 }
353
354 char* java_lang_String::as_quoted_ascii(oop java_string) {
355 typeArrayOop value = java_lang_String::value(java_string);
356 int offset = java_lang_String::offset(java_string);
357 int length = java_lang_String::length(java_string);
358
359 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
360 if (base == NULL) return NULL;
361
362 int result_length = UNICODE::quoted_ascii_length(base, length) + 1;
363 char* result = NEW_RESOURCE_ARRAY(char, result_length);
364 UNICODE::as_quoted_ascii(base, length, result, result_length);
365 assert(result_length >= length + 1, "must not be shorter");
366 assert(result_length == (int)strlen(result) + 1, "must match");
367 return result;
368 }
369
370 unsigned int java_lang_String::hash_string(oop java_string) {
371 int length = java_lang_String::length(java_string);
372 // Zero length string doesn't hash necessarily hash to zero.
373 if (length == 0) {
374 return StringTable::hash_string(NULL, 0);
375 }
376
377 typeArrayOop value = java_lang_String::value(java_string);
378 int offset = java_lang_String::offset(java_string);
379 return StringTable::hash_string(value->char_at_addr(offset), length);
380 }
381
382 Symbol* java_lang_String::as_symbol(Handle java_string, TRAPS) {
383 oop obj = java_string();
384 typeArrayOop value = java_lang_String::value(obj);
385 int offset = java_lang_String::offset(obj);
386 int length = java_lang_String::length(obj);
387 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
388 Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD);
389 return sym;
390 }
391
392 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
393 typeArrayOop value = java_lang_String::value(java_string);
394 int offset = java_lang_String::offset(java_string);
395 int length = java_lang_String::length(java_string);
396 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
397 return SymbolTable::probe_unicode(base, length);
398 }
399
400
401 int java_lang_String::utf8_length(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::utf8_length(position, length);
407 }
408
409 char* java_lang_String::as_utf8_string(oop java_string) {
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);
415 }
416
417 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) {
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 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
422 return UNICODE::as_utf8(position, length, buf, buflen);
423 }
424
425 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
426 typeArrayOop value = java_lang_String::value(java_string);
427 int offset = java_lang_String::offset(java_string);
428 int length = java_lang_String::length(java_string);
429 assert(start + len <= length, "just checking");
430 jchar* position = value->char_at_addr(offset + start);
431 return UNICODE::as_utf8(position, len);
432 }
433
434 char* java_lang_String::as_utf8_string(oop java_string, int start, int len, char* buf, int buflen) {
435 typeArrayOop value = java_lang_String::value(java_string);
436 int offset = java_lang_String::offset(java_string);
437 int length = java_lang_String::length(java_string);
438 assert(start + len <= length, "just checking");
439 jchar* position = value->char_at_addr(offset + start);
440 return UNICODE::as_utf8(position, len, buf, buflen);
441 }
442
443 bool java_lang_String::equals(oop java_string, jchar* chars, int len) {
444 assert(java_string->klass() == SystemDictionary::String_klass(),
445 "must be java_string");
446 typeArrayOop value = java_lang_String::value(java_string);
447 int offset = java_lang_String::offset(java_string);
448 int length = java_lang_String::length(java_string);
449 if (length != len) {
450 return false;
451 }
452 for (int i = 0; i < len; i++) {
453 if (value->char_at(i + offset) != chars[i]) {
454 return false;
455 }
456 }
457 return true;
458 }
459
460 bool java_lang_String::equals(oop str1, oop str2) {
461 assert(str1->klass() == SystemDictionary::String_klass(),
462 "must be java String");
463 assert(str2->klass() == SystemDictionary::String_klass(),
464 "must be java String");
465 typeArrayOop value1 = java_lang_String::value(str1);
466 int offset1 = java_lang_String::offset(str1);
467 int length1 = java_lang_String::length(str1);
468 typeArrayOop value2 = java_lang_String::value(str2);
469 int offset2 = java_lang_String::offset(str2);
470 int length2 = java_lang_String::length(str2);
471
472 if (length1 != length2) {
473 return false;
474 }
475 for (int i = 0; i < length1; i++) {
476 if (value1->char_at(i + offset1) != value2->char_at(i + offset2)) {
477 return false;
478 }
479 }
480 return true;
481 }
482
483 void java_lang_String::print(oop java_string, outputStream* st) {
484 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string");
485 typeArrayOop value = java_lang_String::value(java_string);
486
487 if (value == NULL) {
488 // This can happen if, e.g., printing a String
489 // object before its initializer has been called
490 st->print("NULL");
491 return;
492 }
493
494 int offset = java_lang_String::offset(java_string);
495 int length = java_lang_String::length(java_string);
496
497 st->print("\"");
498 for (int index = 0; index < length; index++) {
499 st->print("%c", value->char_at(index + offset));
500 }
501 st->print("\"");
502 }
503
504
505 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
506 assert(mirror.not_null() && fd->is_static(), "just checking");
507 if (fd->has_initial_value()) {
508 BasicType t = fd->field_type();
509 switch (t) {
510 case T_BYTE:
511 mirror()->byte_field_put(fd->offset(), fd->int_initial_value());
512 break;
513 case T_BOOLEAN:
514 mirror()->bool_field_put(fd->offset(), fd->int_initial_value());
515 break;
516 case T_CHAR:
517 mirror()->char_field_put(fd->offset(), fd->int_initial_value());
518 break;
519 case T_SHORT:
520 mirror()->short_field_put(fd->offset(), fd->int_initial_value());
521 break;
522 case T_INT:
523 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
524 break;
525 case T_FLOAT:
526 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
527 break;
528 case T_DOUBLE:
529 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
530 break;
531 case T_LONG:
532 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
533 break;
534 case T_OBJECT:
535 {
536 #ifdef ASSERT
537 TempNewSymbol sym = SymbolTable::new_symbol("Ljava/lang/String;", CHECK);
538 assert(fd->signature() == sym, "just checking");
539 #endif
540 oop string = fd->string_initial_value(CHECK);
541 mirror()->obj_field_put(fd->offset(), string);
542 }
543 break;
544 default:
545 THROW_MSG(vmSymbols::java_lang_ClassFormatError(),
546 "Illegal ConstantValue attribute in class file");
547 }
548 }
549 }
550
551
552 void java_lang_Class::fixup_mirror(KlassHandle k, TRAPS) {
553 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
554
555 // If the offset was read from the shared archive, it was fixed up already
556 if (!k->is_shared()) {
557 if (k->oop_is_instance()) {
558 // During bootstrap, java.lang.Class wasn't loaded so static field
559 // offsets were computed without the size added it. Go back and
560 // update all the static field offsets to included the size.
561 for (JavaFieldStream fs(InstanceKlass::cast(k())); !fs.done(); fs.next()) {
562 if (fs.access_flags().is_static()) {
563 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields();
564 fs.set_offset(real_offset);
565 }
566 }
567 }
568 }
569 create_mirror(k, Handle(NULL), Handle(NULL), CHECK);
570 }
571
572 void java_lang_Class::initialize_mirror_fields(KlassHandle k,
573 Handle mirror,
574 Handle protection_domain,
575 TRAPS) {
576 // Allocate a simple java object for a lock.
577 // This needs to be a java object because during class initialization
578 // it can be held across a java call.
579 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
580 set_init_lock(mirror(), r);
581
582 // Set protection domain also
583 set_protection_domain(mirror(), protection_domain());
584
585 // Initialize static fields
586 InstanceKlass::cast(k())->do_local_static_fields(&initialize_static_field, mirror, CHECK);
587 }
588
589 void java_lang_Class::create_mirror(KlassHandle k, Handle class_loader,
590 Handle protection_domain, TRAPS) {
591 assert(k->java_mirror() == NULL, "should only assign mirror once");
592 // Use this moment of initialization to cache modifier_flags also,
593 // to support Class.getModifiers(). Instance classes recalculate
594 // the cached flags after the class file is parsed, but before the
595 // class is put into the system dictionary.
596 int computed_modifiers = k->compute_modifier_flags(CHECK);
597 k->set_modifier_flags(computed_modifiers);
598 // Class_klass has to be loaded because it is used to allocate
599 // the mirror.
600 if (SystemDictionary::Class_klass_loaded()) {
601 // Allocate mirror (java.lang.Class instance)
602 Handle mirror = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK);
603
604 // Setup indirection from mirror->klass
605 if (!k.is_null()) {
606 java_lang_Class::set_klass(mirror(), k());
607 }
608
609 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
610 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
611
612 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
613
614 // It might also have a component mirror. This mirror must already exist.
615 if (k->oop_is_array()) {
616 Handle comp_mirror;
617 if (k->oop_is_typeArray()) {
618 BasicType type = TypeArrayKlass::cast(k())->element_type();
619 comp_mirror = Universe::java_mirror(type);
620 } else {
621 assert(k->oop_is_objArray(), "Must be");
622 Klass* element_klass = ObjArrayKlass::cast(k())->element_klass();
623 assert(element_klass != NULL, "Must have an element klass");
624 comp_mirror = element_klass->java_mirror();
625 }
626 assert(comp_mirror.not_null(), "must have a mirror");
627
628 // Two-way link between the array klass and its component mirror:
629 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
630 set_component_mirror(mirror(), comp_mirror());
631 set_array_klass(comp_mirror(), k());
632 } else {
633 assert(k->oop_is_instance(), "Must be");
634
635 initialize_mirror_fields(k, mirror, protection_domain, THREAD);
636 if (HAS_PENDING_EXCEPTION) {
637 // If any of the fields throws an exception like OOM remove the klass field
638 // from the mirror so GC doesn't follow it after the klass has been deallocated.
639 // This mirror looks like a primitive type, which logically it is because it
640 // it represents no class.
641 java_lang_Class::set_klass(mirror(), NULL);
642 return;
643 }
644 }
645
646 // set the classLoader field in the java_lang_Class instance
647 assert(class_loader() == k->class_loader(), "should be same");
648 set_class_loader(mirror(), class_loader());
649
650 // Setup indirection from klass->mirror last
651 // after any exceptions can happen during allocations.
652 if (!k.is_null()) {
653 k->set_java_mirror(mirror());
654 }
655 } else {
656 if (fixup_mirror_list() == NULL) {
657 GrowableArray<Klass*>* list =
658 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true);
659 set_fixup_mirror_list(list);
660 }
661 fixup_mirror_list()->push(k());
662 }
663 }
664
665
666 int java_lang_Class::oop_size(oop java_class) {
667 assert(_oop_size_offset != 0, "must be set");
668 return java_class->int_field(_oop_size_offset);
669 }
670 void java_lang_Class::set_oop_size(oop java_class, int size) {
671 assert(_oop_size_offset != 0, "must be set");
672 java_class->int_field_put(_oop_size_offset, size);
673 }
674 int java_lang_Class::static_oop_field_count(oop java_class) {
675 assert(_static_oop_field_count_offset != 0, "must be set");
676 return java_class->int_field(_static_oop_field_count_offset);
677 }
678 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
679 assert(_static_oop_field_count_offset != 0, "must be set");
680 java_class->int_field_put(_static_oop_field_count_offset, size);
681 }
682
683 oop java_lang_Class::protection_domain(oop java_class) {
684 assert(_protection_domain_offset != 0, "must be set");
685 return java_class->obj_field(_protection_domain_offset);
686 }
687 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
688 assert(_protection_domain_offset != 0, "must be set");
689 java_class->obj_field_put(_protection_domain_offset, pd);
690 }
691
692 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
693 assert(_component_mirror_offset != 0, "must be set");
694 java_class->obj_field_put(_component_mirror_offset, comp_mirror);
695 }
696 oop java_lang_Class::component_mirror(oop java_class) {
697 assert(_component_mirror_offset != 0, "must be set");
698 return java_class->obj_field(_component_mirror_offset);
699 }
700
701 oop java_lang_Class::init_lock(oop java_class) {
702 assert(_init_lock_offset != 0, "must be set");
703 return java_class->obj_field(_init_lock_offset);
704 }
705 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
706 assert(_init_lock_offset != 0, "must be set");
707 java_class->obj_field_put(_init_lock_offset, init_lock);
708 }
709
710 objArrayOop java_lang_Class::signers(oop java_class) {
711 assert(_signers_offset != 0, "must be set");
712 return (objArrayOop)java_class->obj_field(_signers_offset);
713 }
714 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) {
715 assert(_signers_offset != 0, "must be set");
716 java_class->obj_field_put(_signers_offset, (oop)signers);
717 }
718
719
720 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
721 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet.
722 if (_class_loader_offset != 0) {
723 java_class->obj_field_put(_class_loader_offset, loader);
724 }
725 }
726
727 oop java_lang_Class::class_loader(oop java_class) {
728 assert(_class_loader_offset != 0, "must be set");
729 return java_class->obj_field(_class_loader_offset);
730 }
731
732 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
733 // This should be improved by adding a field at the Java level or by
734 // introducing a new VM klass (see comment in ClassFileParser)
735 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0);
736 if (type != T_VOID) {
737 Klass* aklass = Universe::typeArrayKlassObj(type);
738 assert(aklass != NULL, "correct bootstrap");
739 set_array_klass(java_class, aklass);
740 }
741 #ifdef ASSERT
742 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass());
743 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
744 #endif
745 return java_class;
746 }
747
748
749 Klass* java_lang_Class::as_Klass(oop java_class) {
750 //%note memory_2
751 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
752 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset));
753 assert(k == NULL || k->is_klass(), "type check");
754 return k;
755 }
756
757
758 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
759 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
760 java_class->metadata_field_put(_klass_offset, klass);
761 }
762
763
764 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
765 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
766 Symbol* name = NULL;
767 bool is_instance = false;
768 if (is_primitive(java_class)) {
769 name = vmSymbols::type_signature(primitive_type(java_class));
770 } else {
771 Klass* k = as_Klass(java_class);
772 is_instance = k->oop_is_instance();
773 name = k->name();
774 }
775 if (name == NULL) {
776 st->print("<null>");
777 return;
778 }
779 if (is_instance) st->print("L");
780 st->write((char*) name->base(), (int) name->utf8_length());
781 if (is_instance) st->print(";");
782 }
783
784 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) {
785 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
786 Symbol* name;
787 if (is_primitive(java_class)) {
788 name = vmSymbols::type_signature(primitive_type(java_class));
789 // Because this can create a new symbol, the caller has to decrement
790 // the refcount, so make adjustment here and below for symbols returned
791 // that are not created or incremented due to a successful lookup.
792 name->increment_refcount();
793 } else {
794 Klass* k = as_Klass(java_class);
795 if (!k->oop_is_instance()) {
796 name = k->name();
797 name->increment_refcount();
798 } else {
799 ResourceMark rm;
800 const char* sigstr = k->signature_name();
801 int siglen = (int) strlen(sigstr);
802 if (!intern_if_not_found) {
803 name = SymbolTable::probe(sigstr, siglen);
804 } else {
805 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
806 }
807 }
808 }
809 return name;
810 }
811
812 // Returns the Java name for this Java mirror (Resource allocated)
813 // See Klass::external_name().
814 // For primitive type Java mirrors, its type name is returned.
815 const char* java_lang_Class::as_external_name(oop java_class) {
816 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
817 const char* name = NULL;
818 if (is_primitive(java_class)) {
819 name = type2name(primitive_type(java_class));
820 } else {
821 name = as_Klass(java_class)->external_name();
822 }
823 if (name == NULL) {
824 name = "<null>";
825 }
826 return name;
827 }
828
829 Klass* java_lang_Class::array_klass(oop java_class) {
830 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
831 assert(k == NULL || k->is_klass() && k->oop_is_array(), "should be array klass");
832 return k;
833 }
834
835
836 void java_lang_Class::set_array_klass(oop java_class, Klass* klass) {
837 assert(klass->is_klass() && klass->oop_is_array(), "should be array klass");
838 java_class->metadata_field_put(_array_klass_offset, klass);
839 }
840
841
842 bool java_lang_Class::is_primitive(oop java_class) {
843 // should assert:
844 //assert(java_lang_Class::is_instance(java_class), "must be a Class object");
845 bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL);
846
847 #ifdef ASSERT
848 if (is_primitive) {
849 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
850 assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()),
851 "Should be either the T_VOID primitive or a java primitive");
852 }
853 #endif
854
855 return is_primitive;
856 }
857
858
859 BasicType java_lang_Class::primitive_type(oop java_class) {
860 assert(java_lang_Class::is_primitive(java_class), "just checking");
861 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
862 BasicType type = T_VOID;
863 if (ak != NULL) {
864 // Note: create_basic_type_mirror above initializes ak to a non-null value.
865 type = ArrayKlass::cast(ak)->element_type();
866 } else {
867 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
868 }
869 assert(Universe::java_mirror(type) == java_class, "must be consistent");
870 return type;
871 }
872
873 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
874 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
875 if (is_primitive(java_class)) {
876 if (reference_klass != NULL)
877 (*reference_klass) = NULL;
878 return primitive_type(java_class);
879 } else {
880 if (reference_klass != NULL)
881 (*reference_klass) = as_Klass(java_class);
882 return T_OBJECT;
883 }
884 }
885
886
887 oop java_lang_Class::primitive_mirror(BasicType t) {
888 oop mirror = Universe::java_mirror(t);
889 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class");
890 assert(java_lang_Class::is_primitive(mirror), "must be primitive");
891 return mirror;
892 }
893
894 bool java_lang_Class::offsets_computed = false;
895 int java_lang_Class::classRedefinedCount_offset = -1;
896
897 void java_lang_Class::compute_offsets() {
898 assert(!offsets_computed, "offsets should be initialized only once");
899 offsets_computed = true;
900
901 Klass* k = SystemDictionary::Class_klass();
902 // The classRedefinedCount field is only present starting in 1.5,
903 // so don't go fatal.
904 compute_optional_offset(classRedefinedCount_offset,
905 k, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature());
906
907 // Needs to be optional because the old build runs Queens during bootstrapping
908 // and jdk8-9 doesn't have coordinated pushes yet.
909 compute_optional_offset(_class_loader_offset,
910 k, vmSymbols::classLoader_name(),
911 vmSymbols::classloader_signature());
912
913 compute_offset(_component_mirror_offset,
914 k, vmSymbols::componentType_name(),
915 vmSymbols::class_signature());
916
917 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have
918 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops
919 // GC treats them the same.
920 _init_lock_offset = _component_mirror_offset;
921
922 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
923 }
924
925 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
926 if (classRedefinedCount_offset == -1) {
927 // If we don't have an offset for it then just return -1 as a marker.
928 return -1;
929 }
930
931 return the_class_mirror->int_field(classRedefinedCount_offset);
932 }
933
934 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
935 if (classRedefinedCount_offset == -1) {
936 // If we don't have an offset for it then nothing to set.
937 return;
938 }
939
940 the_class_mirror->int_field_put(classRedefinedCount_offset, value);
941 }
942
943
944 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
945 // platform thread structure, and a eetop offset which was used for thread
946 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
947 // merged, so in the HotSpot VM we just use the eetop field for the thread
948 // instead of the privateInfo_offset.
949 //
950 // Note: The stackSize field is only present starting in 1.4.
951
952 int java_lang_Thread::_name_offset = 0;
953 int java_lang_Thread::_group_offset = 0;
954 int java_lang_Thread::_contextClassLoader_offset = 0;
955 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
956 int java_lang_Thread::_priority_offset = 0;
957 int java_lang_Thread::_eetop_offset = 0;
958 int java_lang_Thread::_daemon_offset = 0;
959 int java_lang_Thread::_stillborn_offset = 0;
960 int java_lang_Thread::_stackSize_offset = 0;
961 int java_lang_Thread::_tid_offset = 0;
962 int java_lang_Thread::_thread_status_offset = 0;
963 int java_lang_Thread::_park_blocker_offset = 0;
964 int java_lang_Thread::_park_event_offset = 0 ;
965
966
967 void java_lang_Thread::compute_offsets() {
968 assert(_group_offset == 0, "offsets should be initialized only once");
969
970 Klass* k = SystemDictionary::Thread_klass();
971 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
972 compute_offset(_group_offset, k, vmSymbols::group_name(), vmSymbols::threadgroup_signature());
973 compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature());
974 compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature());
975 compute_offset(_priority_offset, k, vmSymbols::priority_name(), vmSymbols::int_signature());
976 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
977 compute_offset(_eetop_offset, k, vmSymbols::eetop_name(), vmSymbols::long_signature());
978 compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature());
979 // The stackSize field is only present starting in 1.4, so don't go fatal.
980 compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature());
981 // The tid and thread_status fields are only present starting in 1.5, so don't go fatal.
982 compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature());
983 compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature());
984 // The parkBlocker field is only present starting in 1.6, so don't go fatal.
985 compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature());
986 compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(),
987 vmSymbols::long_signature());
988 }
989
990
991 JavaThread* java_lang_Thread::thread(oop java_thread) {
992 return (JavaThread*)java_thread->address_field(_eetop_offset);
993 }
994
995
996 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
997 java_thread->address_field_put(_eetop_offset, (address)thread);
998 }
999
1000
1001 oop java_lang_Thread::name(oop java_thread) {
1002 return java_thread->obj_field(_name_offset);
1003 }
1004
1005
1006 void java_lang_Thread::set_name(oop java_thread, oop name) {
1007 java_thread->obj_field_put(_name_offset, name);
1008 }
1009
1010
1011 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1012 return (ThreadPriority)java_thread->int_field(_priority_offset);
1013 }
1014
1015
1016 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1017 java_thread->int_field_put(_priority_offset, priority);
1018 }
1019
1020
1021 oop java_lang_Thread::threadGroup(oop java_thread) {
1022 return java_thread->obj_field(_group_offset);
1023 }
1024
1025
1026 bool java_lang_Thread::is_stillborn(oop java_thread) {
1027 return java_thread->bool_field(_stillborn_offset) != 0;
1028 }
1029
1030
1031 // We never have reason to turn the stillborn bit off
1032 void java_lang_Thread::set_stillborn(oop java_thread) {
1033 java_thread->bool_field_put(_stillborn_offset, true);
1034 }
1035
1036
1037 bool java_lang_Thread::is_alive(oop java_thread) {
1038 JavaThread* thr = java_lang_Thread::thread(java_thread);
1039 return (thr != NULL);
1040 }
1041
1042
1043 bool java_lang_Thread::is_daemon(oop java_thread) {
1044 return java_thread->bool_field(_daemon_offset) != 0;
1045 }
1046
1047
1048 void java_lang_Thread::set_daemon(oop java_thread) {
1049 java_thread->bool_field_put(_daemon_offset, true);
1050 }
1051
1052 oop java_lang_Thread::context_class_loader(oop java_thread) {
1053 return java_thread->obj_field(_contextClassLoader_offset);
1054 }
1055
1056 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
1057 return java_thread->obj_field(_inheritedAccessControlContext_offset);
1058 }
1059
1060
1061 jlong java_lang_Thread::stackSize(oop java_thread) {
1062 if (_stackSize_offset > 0) {
1063 return java_thread->long_field(_stackSize_offset);
1064 } else {
1065 return 0;
1066 }
1067 }
1068
1069 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1070 void java_lang_Thread::set_thread_status(oop java_thread,
1071 java_lang_Thread::ThreadStatus status) {
1072 // The threadStatus is only present starting in 1.5
1073 if (_thread_status_offset > 0) {
1074 java_thread->int_field_put(_thread_status_offset, status);
1075 }
1076 }
1077
1078 // Read thread status value from threadStatus field in java.lang.Thread java class.
1079 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1080 assert(Thread::current()->is_Watcher_thread() || Thread::current()->is_VM_thread() ||
1081 JavaThread::current()->thread_state() == _thread_in_vm,
1082 "Java Thread is not running in vm");
1083 // The threadStatus is only present starting in 1.5
1084 if (_thread_status_offset > 0) {
1085 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1086 } else {
1087 // All we can easily figure out is if it is alive, but that is
1088 // enough info for a valid unknown status.
1089 // These aren't restricted to valid set ThreadStatus values, so
1090 // use JVMTI values and cast.
1091 JavaThread* thr = java_lang_Thread::thread(java_thread);
1092 if (thr == NULL) {
1093 // the thread hasn't run yet or is in the process of exiting
1094 return NEW;
1095 }
1096 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE;
1097 }
1098 }
1099
1100
1101 jlong java_lang_Thread::thread_id(oop java_thread) {
1102 // The thread ID field is only present starting in 1.5
1103 if (_tid_offset > 0) {
1104 return java_thread->long_field(_tid_offset);
1105 } else {
1106 return 0;
1107 }
1108 }
1109
1110 oop java_lang_Thread::park_blocker(oop java_thread) {
1111 assert(JDK_Version::current().supports_thread_park_blocker() &&
1112 _park_blocker_offset != 0, "Must support parkBlocker field");
1113
1114 if (_park_blocker_offset > 0) {
1115 return java_thread->obj_field(_park_blocker_offset);
1116 }
1117
1118 return NULL;
1119 }
1120
1121 jlong java_lang_Thread::park_event(oop java_thread) {
1122 if (_park_event_offset > 0) {
1123 return java_thread->long_field(_park_event_offset);
1124 }
1125 return 0;
1126 }
1127
1128 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) {
1129 if (_park_event_offset > 0) {
1130 java_thread->long_field_put(_park_event_offset, ptr);
1131 return true;
1132 }
1133 return false;
1134 }
1135
1136
1137 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1138 assert(_thread_status_offset != 0, "Must have thread status");
1139 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1140 switch (status) {
1141 case NEW : return "NEW";
1142 case RUNNABLE : return "RUNNABLE";
1143 case SLEEPING : return "TIMED_WAITING (sleeping)";
1144 case IN_OBJECT_WAIT : return "WAITING (on object monitor)";
1145 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
1146 case PARKED : return "WAITING (parking)";
1147 case PARKED_TIMED : return "TIMED_WAITING (parking)";
1148 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1149 case TERMINATED : return "TERMINATED";
1150 default : return "UNKNOWN";
1151 };
1152 }
1153 int java_lang_ThreadGroup::_parent_offset = 0;
1154 int java_lang_ThreadGroup::_name_offset = 0;
1155 int java_lang_ThreadGroup::_threads_offset = 0;
1156 int java_lang_ThreadGroup::_groups_offset = 0;
1157 int java_lang_ThreadGroup::_maxPriority_offset = 0;
1158 int java_lang_ThreadGroup::_destroyed_offset = 0;
1159 int java_lang_ThreadGroup::_daemon_offset = 0;
1160 int java_lang_ThreadGroup::_vmAllowSuspension_offset = 0;
1161 int java_lang_ThreadGroup::_nthreads_offset = 0;
1162 int java_lang_ThreadGroup::_ngroups_offset = 0;
1163
1164 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
1165 assert(java_thread_group->is_oop(), "thread group must be oop");
1166 return java_thread_group->obj_field(_parent_offset);
1167 }
1168
1169 // ("name as oop" accessor is not necessary)
1170
1171 typeArrayOop java_lang_ThreadGroup::name(oop java_thread_group) {
1172 oop name = java_thread_group->obj_field(_name_offset);
1173 // ThreadGroup.name can be null
1174 return name == NULL ? (typeArrayOop)NULL : java_lang_String::value(name);
1175 }
1176
1177 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
1178 assert(java_thread_group->is_oop(), "thread group must be oop");
1179 return java_thread_group->int_field(_nthreads_offset);
1180 }
1181
1182 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
1183 oop threads = java_thread_group->obj_field(_threads_offset);
1184 assert(threads != NULL, "threadgroups should have threads");
1185 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
1186 return objArrayOop(threads);
1187 }
1188
1189 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
1190 assert(java_thread_group->is_oop(), "thread group must be oop");
1191 return java_thread_group->int_field(_ngroups_offset);
1192 }
1193
1194 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
1195 oop groups = java_thread_group->obj_field(_groups_offset);
1196 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
1197 return objArrayOop(groups);
1198 }
1199
1200 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1201 assert(java_thread_group->is_oop(), "thread group must be oop");
1202 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1203 }
1204
1205 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
1206 assert(java_thread_group->is_oop(), "thread group must be oop");
1207 return java_thread_group->bool_field(_destroyed_offset) != 0;
1208 }
1209
1210 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1211 assert(java_thread_group->is_oop(), "thread group must be oop");
1212 return java_thread_group->bool_field(_daemon_offset) != 0;
1213 }
1214
1215 bool java_lang_ThreadGroup::is_vmAllowSuspension(oop java_thread_group) {
1216 assert(java_thread_group->is_oop(), "thread group must be oop");
1217 return java_thread_group->bool_field(_vmAllowSuspension_offset) != 0;
1218 }
1219
1220 void java_lang_ThreadGroup::compute_offsets() {
1221 assert(_parent_offset == 0, "offsets should be initialized only once");
1222
1223 Klass* k = SystemDictionary::ThreadGroup_klass();
1224
1225 compute_offset(_parent_offset, k, vmSymbols::parent_name(), vmSymbols::threadgroup_signature());
1226 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1227 compute_offset(_threads_offset, k, vmSymbols::threads_name(), vmSymbols::thread_array_signature());
1228 compute_offset(_groups_offset, k, vmSymbols::groups_name(), vmSymbols::threadgroup_array_signature());
1229 compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature());
1230 compute_offset(_destroyed_offset, k, vmSymbols::destroyed_name(), vmSymbols::bool_signature());
1231 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
1232 compute_offset(_vmAllowSuspension_offset, k, vmSymbols::vmAllowSuspension_name(), vmSymbols::bool_signature());
1233 compute_offset(_nthreads_offset, k, vmSymbols::nthreads_name(), vmSymbols::int_signature());
1234 compute_offset(_ngroups_offset, k, vmSymbols::ngroups_name(), vmSymbols::int_signature());
1235 }
1236
1237 oop java_lang_Throwable::unassigned_stacktrace() {
1238 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Throwable_klass());
1239 address addr = ik->static_field_addr(static_unassigned_stacktrace_offset);
1240 if (UseCompressedOops) {
1241 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
1242 } else {
1243 return oopDesc::load_decode_heap_oop((oop*)addr);
1244 }
1245 }
1246
1247 oop java_lang_Throwable::backtrace(oop throwable) {
1248 return throwable->obj_field_acquire(backtrace_offset);
1249 }
1250
1251
1252 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
1253 throwable->release_obj_field_put(backtrace_offset, value);
1254 }
1255
1256
1257 oop java_lang_Throwable::message(oop throwable) {
1258 return throwable->obj_field(detailMessage_offset);
1259 }
1260
1261
1262 oop java_lang_Throwable::message(Handle throwable) {
1263 return throwable->obj_field(detailMessage_offset);
1264 }
1265
1266
1267 // Return Symbol for detailed_message or NULL
1268 Symbol* java_lang_Throwable::detail_message(oop throwable) {
1269 PRESERVE_EXCEPTION_MARK; // Keep original exception
1270 oop detailed_message = java_lang_Throwable::message(throwable);
1271 if (detailed_message != NULL) {
1272 return java_lang_String::as_symbol(detailed_message, THREAD);
1273 }
1274 return NULL;
1275 }
1276
1277 void java_lang_Throwable::set_message(oop throwable, oop value) {
1278 throwable->obj_field_put(detailMessage_offset, value);
1279 }
1280
1281
1282 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
1283 throwable->obj_field_put(stackTrace_offset, st_element_array);
1284 }
1285
1286 void java_lang_Throwable::clear_stacktrace(oop throwable) {
1287 set_stacktrace(throwable, NULL);
1288 }
1289
1290
1291 void java_lang_Throwable::print(oop throwable, outputStream* st) {
1292 ResourceMark rm;
1293 Klass* k = throwable->klass();
1294 assert(k != NULL, "just checking");
1295 st->print("%s", InstanceKlass::cast(k)->external_name());
1296 oop msg = message(throwable);
1297 if (msg != NULL) {
1298 st->print(": %s", java_lang_String::as_utf8_string(msg));
1299 }
1300 }
1301
1302
1303 void java_lang_Throwable::print(Handle throwable, outputStream* st) {
1304 ResourceMark rm;
1305 Klass* k = throwable->klass();
1306 assert(k != NULL, "just checking");
1307 st->print("%s", InstanceKlass::cast(k)->external_name());
1308 oop msg = message(throwable);
1309 if (msg != NULL) {
1310 st->print(": %s", java_lang_String::as_utf8_string(msg));
1311 }
1312 }
1313
1314 // After this many redefines, the stack trace is unreliable.
1315 const int MAX_VERSION = USHRT_MAX;
1316
1317 // Helper backtrace functions to store bci|version together.
1318 static inline int merge_bci_and_version(int bci, int version) {
1319 // only store u2 for version, checking for overflow.
1320 if (version > USHRT_MAX || version < 0) version = MAX_VERSION;
1321 assert((jushort)bci == bci, "bci should be short");
1322 return build_int_from_shorts(version, bci);
1323 }
1324
1325 static inline int bci_at(unsigned int merged) {
1326 return extract_high_short_from_int(merged);
1327 }
1328 static inline int version_at(unsigned int merged) {
1329 return extract_low_short_from_int(merged);
1330 }
1331
1332 static inline bool version_matches(Method* method, int version) {
1333 assert(version < MAX_VERSION, "version is too big");
1334 return method != NULL && (method->constants()->version() == version);
1335 }
1336
1337 static inline int get_line_number(Method* method, int bci) {
1338 int line_number = 0;
1339 if (method->is_native()) {
1340 // Negative value different from -1 below, enabling Java code in
1341 // class java.lang.StackTraceElement to distinguish "native" from
1342 // "no LineNumberTable". JDK tests for -2.
1343 line_number = -2;
1344 } else {
1345 // Returns -1 if no LineNumberTable, and otherwise actual line number
1346 line_number = method->line_number_from_bci(bci);
1347 if (line_number == -1 && ShowHiddenFrames) {
1348 line_number = bci + 1000000;
1349 }
1350 }
1351 return line_number;
1352 }
1353
1354 // This class provides a simple wrapper over the internal structure of
1355 // exception backtrace to insulate users of the backtrace from needing
1356 // to know what it looks like.
1357 class BacktraceBuilder: public StackObj {
1358 private:
1359 Handle _backtrace;
1360 objArrayOop _head;
1361 typeArrayOop _methods;
1362 typeArrayOop _bcis;
1363 objArrayOop _mirrors;
1364 typeArrayOop _cprefs; // needed to insulate method name against redefinition
1365 int _index;
1366 No_Safepoint_Verifier _nsv;
1367
1368 public:
1369
1370 enum {
1371 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
1372 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
1373 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
1374 trace_cprefs_offset = java_lang_Throwable::trace_cprefs_offset,
1375 trace_next_offset = java_lang_Throwable::trace_next_offset,
1376 trace_size = java_lang_Throwable::trace_size,
1377 trace_chunk_size = java_lang_Throwable::trace_chunk_size
1378 };
1379
1380 // get info out of chunks
1381 static typeArrayOop get_methods(objArrayHandle chunk) {
1382 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
1383 assert(methods != NULL, "method array should be initialized in backtrace");
1384 return methods;
1385 }
1386 static typeArrayOop get_bcis(objArrayHandle chunk) {
1387 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1388 assert(bcis != NULL, "bci array should be initialized in backtrace");
1389 return bcis;
1390 }
1391 static objArrayOop get_mirrors(objArrayHandle chunk) {
1392 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
1393 assert(mirrors != NULL, "mirror array should be initialized in backtrace");
1394 return mirrors;
1395 }
1396 static typeArrayOop get_cprefs(objArrayHandle chunk) {
1397 typeArrayOop cprefs = typeArrayOop(chunk->obj_at(trace_cprefs_offset));
1398 assert(cprefs != NULL, "cprefs array should be initialized in backtrace");
1399 return cprefs;
1400 }
1401
1402 // constructor for new backtrace
1403 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _mirrors(NULL), _cprefs(NULL) {
1404 expand(CHECK);
1405 _backtrace = _head;
1406 _index = 0;
1407 }
1408
1409 BacktraceBuilder(objArrayHandle backtrace) {
1410 _methods = get_methods(backtrace);
1411 _bcis = get_bcis(backtrace);
1412 _mirrors = get_mirrors(backtrace);
1413 _cprefs = get_cprefs(backtrace);
1414 assert(_methods->length() == _bcis->length() &&
1415 _methods->length() == _mirrors->length(),
1416 "method and source information arrays should match");
1417
1418 // head is the preallocated backtrace
1419 _backtrace = _head = backtrace();
1420 _index = 0;
1421 }
1422
1423 void expand(TRAPS) {
1424 objArrayHandle old_head(THREAD, _head);
1425 Pause_No_Safepoint_Verifier pnsv(&_nsv);
1426
1427 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
1428 objArrayHandle new_head(THREAD, head);
1429
1430 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1431 typeArrayHandle new_methods(THREAD, methods);
1432
1433 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
1434 typeArrayHandle new_bcis(THREAD, bcis);
1435
1436 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
1437 objArrayHandle new_mirrors(THREAD, mirrors);
1438
1439 typeArrayOop cprefs = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1440 typeArrayHandle new_cprefs(THREAD, cprefs);
1441
1442 if (!old_head.is_null()) {
1443 old_head->obj_at_put(trace_next_offset, new_head());
1444 }
1445 new_head->obj_at_put(trace_methods_offset, new_methods());
1446 new_head->obj_at_put(trace_bcis_offset, new_bcis());
1447 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
1448 new_head->obj_at_put(trace_cprefs_offset, new_cprefs());
1449
1450 _head = new_head();
1451 _methods = new_methods();
1452 _bcis = new_bcis();
1453 _mirrors = new_mirrors();
1454 _cprefs = new_cprefs();
1455 _index = 0;
1456 }
1457
1458 oop backtrace() {
1459 return _backtrace();
1460 }
1461
1462 inline void push(Method* method, int bci, TRAPS) {
1463 // Smear the -1 bci to 0 since the array only holds unsigned
1464 // shorts. The later line number lookup would just smear the -1
1465 // to a 0 even if it could be recorded.
1466 if (bci == SynchronizationEntryBCI) bci = 0;
1467
1468 if (_index >= trace_chunk_size) {
1469 methodHandle mhandle(THREAD, method);
1470 expand(CHECK);
1471 method = mhandle();
1472 }
1473
1474 _methods->short_at_put(_index, method->orig_method_idnum());
1475 _bcis->int_at_put(_index, merge_bci_and_version(bci, method->constants()->version()));
1476 _cprefs->short_at_put(_index, method->name_index());
1477
1478 // We need to save the mirrors in the backtrace to keep the class
1479 // from being unloaded while we still have this stack trace.
1480 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror");
1481 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
1482 _index++;
1483 }
1484
1485 };
1486
1487 Symbol* get_source_file_name(InstanceKlass* holder, int version) {
1488 // Find the specific ik version that contains this source_file_name_index
1489 // via the previous versions list, but use the current version's
1490 // constant pool to look it up. The previous version's index has been
1491 // merged for the current constant pool.
1492 InstanceKlass* ik = holder->get_klass_version(version);
1493 // This version has been cleaned up.
1494 if (ik == NULL) return NULL;
1495 int source_file_name_index = ik->source_file_name_index();
1496 return (source_file_name_index == 0) ?
1497 (Symbol*)NULL : holder->constants()->symbol_at(source_file_name_index);
1498 }
1499
1500 // Print stack trace element to resource allocated buffer
1501 char* java_lang_Throwable::print_stack_element_to_buffer(Handle mirror,
1502 int method_id, int version, int bci, int cpref) {
1503
1504 // Get strings and string lengths
1505 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
1506 const char* klass_name = holder->external_name();
1507 int buf_len = (int)strlen(klass_name);
1508
1509 Method* method = holder->method_with_orig_idnum(method_id, version);
1510
1511 // The method can be NULL if the requested class version is gone
1512 Symbol* sym = (method != NULL) ? method->name() : holder->constants()->symbol_at(cpref);
1513 char* method_name = sym->as_C_string();
1514 buf_len += (int)strlen(method_name);
1515
1516 char* source_file_name = NULL;
1517 Symbol* source = get_source_file_name(holder, version);
1518 if (source != NULL) {
1519 source_file_name = source->as_C_string();
1520 buf_len += (int)strlen(source_file_name);
1521 }
1522
1523 // Allocate temporary buffer with extra space for formatting and line number
1524 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
1525
1526 // Print stack trace line in buffer
1527 sprintf(buf, "\tat %s.%s", klass_name, method_name);
1528
1529 if (!version_matches(method, version)) {
1530 strcat(buf, "(Redefined)");
1531 } else {
1532 int line_number = get_line_number(method, bci);
1533 if (line_number == -2) {
1534 strcat(buf, "(Native Method)");
1535 } else {
1536 if (source_file_name != NULL && (line_number != -1)) {
1537 // Sourcename and linenumber
1538 sprintf(buf + (int)strlen(buf), "(%s:%d)", source_file_name, line_number);
1539 } else if (source_file_name != NULL) {
1540 // Just sourcename
1541 sprintf(buf + (int)strlen(buf), "(%s)", source_file_name);
1542 } else {
1543 // Neither sourcename nor linenumber
1544 sprintf(buf + (int)strlen(buf), "(Unknown Source)");
1545 }
1546 nmethod* nm = method->code();
1547 if (WizardMode && nm != NULL) {
1548 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
1549 }
1550 }
1551 }
1552
1553 return buf;
1554 }
1555
1556 void java_lang_Throwable::print_stack_element(outputStream *st, Handle mirror,
1557 int method_id, int version, int bci, int cpref) {
1558 ResourceMark rm;
1559 char* buf = print_stack_element_to_buffer(mirror, method_id, version, bci, cpref);
1560 st->print_cr("%s", buf);
1561 }
1562
1563 void java_lang_Throwable::print_stack_element(outputStream *st, methodHandle method, int bci) {
1564 Handle mirror = method->method_holder()->java_mirror();
1565 int method_id = method->orig_method_idnum();
1566 int version = method->constants()->version();
1567 int cpref = method->name_index();
1568 print_stack_element(st, mirror, method_id, version, bci, cpref);
1569 }
1570
1571 const char* java_lang_Throwable::no_stack_trace_message() {
1572 return "\t<<no stack trace available>>";
1573 }
1574
1575
1576 // Currently used only for exceptions occurring during startup
1577 void java_lang_Throwable::print_stack_trace(oop throwable, outputStream* st) {
1578 Thread *THREAD = Thread::current();
1579 Handle h_throwable(THREAD, throwable);
1580 while (h_throwable.not_null()) {
1581 objArrayHandle result (THREAD, objArrayOop(backtrace(h_throwable())));
1582 if (result.is_null()) {
1583 st->print_cr("%s", no_stack_trace_message());
1584 return;
1585 }
1586
1587 while (result.not_null()) {
1588
1589 // Get method id, bci, version and mirror from chunk
1590 typeArrayHandle methods (THREAD, BacktraceBuilder::get_methods(result));
1591 typeArrayHandle bcis (THREAD, BacktraceBuilder::get_bcis(result));
1592 objArrayHandle mirrors (THREAD, BacktraceBuilder::get_mirrors(result));
1593 typeArrayHandle cprefs (THREAD, BacktraceBuilder::get_cprefs(result));
1594
1595 int length = methods()->length();
1596 for (int index = 0; index < length; index++) {
1597 Handle mirror(THREAD, mirrors->obj_at(index));
1598 // NULL mirror means end of stack trace
1599 if (mirror.is_null()) goto handle_cause;
1600 int method = methods->short_at(index);
1601 int version = version_at(bcis->int_at(index));
1602 int bci = bci_at(bcis->int_at(index));
1603 int cpref = cprefs->short_at(index);
1604 print_stack_element(st, mirror, method, version, bci, cpref);
1605 }
1606 result = objArrayHandle(THREAD, objArrayOop(result->obj_at(trace_next_offset)));
1607 }
1608 handle_cause:
1609 {
1610 EXCEPTION_MARK;
1611 JavaValue cause(T_OBJECT);
1612 JavaCalls::call_virtual(&cause,
1613 h_throwable,
1614 KlassHandle(THREAD, h_throwable->klass()),
1615 vmSymbols::getCause_name(),
1616 vmSymbols::void_throwable_signature(),
1617 THREAD);
1618 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
1619 if (HAS_PENDING_EXCEPTION) {
1620 CLEAR_PENDING_EXCEPTION;
1621 h_throwable = Handle();
1622 } else {
1623 h_throwable = Handle(THREAD, (oop) cause.get_jobject());
1624 if (h_throwable.not_null()) {
1625 st->print("Caused by: ");
1626 print(h_throwable, st);
1627 st->cr();
1628 }
1629 }
1630 }
1631 }
1632 }
1633
1634 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method, TRAPS) {
1635 if (!StackTraceInThrowable) return;
1636 ResourceMark rm(THREAD);
1637
1638 // Start out by clearing the backtrace for this object, in case the VM
1639 // runs out of memory while allocating the stack trace
1640 set_backtrace(throwable(), NULL);
1641 // Clear lazily constructed Java level stacktrace if refilling occurs
1642 // This is unnecessary in 1.7+ but harmless
1643 clear_stacktrace(throwable());
1644
1645 int max_depth = MaxJavaStackTraceDepth;
1646 JavaThread* thread = (JavaThread*)THREAD;
1647 BacktraceBuilder bt(CHECK);
1648
1649 // If there is no Java frame just return the method that was being called
1650 // with bci 0
1651 if (!thread->has_last_Java_frame()) {
1652 if (max_depth >= 1 && method() != NULL) {
1653 bt.push(method(), 0, CHECK);
1654 set_backtrace(throwable(), bt.backtrace());
1655 }
1656 return;
1657 }
1658
1659 // Instead of using vframe directly, this version of fill_in_stack_trace
1660 // basically handles everything by hand. This significantly improved the
1661 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
1662 // See bug 6333838 for more details.
1663 // The "ASSERT" here is to verify this method generates the exactly same stack
1664 // trace as utilizing vframe.
1665 #ifdef ASSERT
1666 vframeStream st(thread);
1667 methodHandle st_method(THREAD, st.method());
1668 #endif
1669 int total_count = 0;
1670 RegisterMap map(thread, false);
1671 int decode_offset = 0;
1672 nmethod* nm = NULL;
1673 bool skip_fillInStackTrace_check = false;
1674 bool skip_throwableInit_check = false;
1675 bool skip_hidden = !ShowHiddenFrames;
1676
1677 for (frame fr = thread->last_frame(); max_depth != total_count;) {
1678 Method* method = NULL;
1679 int bci = 0;
1680
1681 // Compiled java method case.
1682 if (decode_offset != 0) {
1683 DebugInfoReadStream stream(nm, decode_offset);
1684 decode_offset = stream.read_int();
1685 method = (Method*)nm->metadata_at(stream.read_int());
1686 bci = stream.read_bci();
1687 } else {
1688 if (fr.is_first_frame()) break;
1689 address pc = fr.pc();
1690 if (fr.is_interpreted_frame()) {
1691 address bcp = fr.interpreter_frame_bcp();
1692 method = fr.interpreter_frame_method();
1693 bci = method->bci_from(bcp);
1694 fr = fr.sender(&map);
1695 } else {
1696 CodeBlob* cb = fr.cb();
1697 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
1698 // but non nmethod
1699 fr = fr.sender(&map);
1700 if (cb == NULL || !cb->is_nmethod()) {
1701 continue;
1702 }
1703 nm = (nmethod*)cb;
1704 if (nm->method()->is_native()) {
1705 method = nm->method();
1706 bci = 0;
1707 } else {
1708 PcDesc* pd = nm->pc_desc_at(pc);
1709 decode_offset = pd->scope_decode_offset();
1710 // if decode_offset is not equal to 0, it will execute the
1711 // "compiled java method case" at the beginning of the loop.
1712 continue;
1713 }
1714 }
1715 }
1716 #ifdef ASSERT
1717 assert(st_method() == method && st.bci() == bci,
1718 "Wrong stack trace");
1719 st.next();
1720 // vframeStream::method isn't GC-safe so store off a copy
1721 // of the Method* in case we GC.
1722 if (!st.at_end()) {
1723 st_method = st.method();
1724 }
1725 #endif
1726
1727 // the format of the stacktrace will be:
1728 // - 1 or more fillInStackTrace frames for the exception class (skipped)
1729 // - 0 or more <init> methods for the exception class (skipped)
1730 // - rest of the stack
1731
1732 if (!skip_fillInStackTrace_check) {
1733 if (method->name() == vmSymbols::fillInStackTrace_name() &&
1734 throwable->is_a(method->method_holder())) {
1735 continue;
1736 }
1737 else {
1738 skip_fillInStackTrace_check = true; // gone past them all
1739 }
1740 }
1741 if (!skip_throwableInit_check) {
1742 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
1743
1744 // skip <init> methods of the exception class and superclasses
1745 // This is simlar to classic VM.
1746 if (method->name() == vmSymbols::object_initializer_name() &&
1747 throwable->is_a(method->method_holder())) {
1748 continue;
1749 } else {
1750 // there are none or we've seen them all - either way stop checking
1751 skip_throwableInit_check = true;
1752 }
1753 }
1754 if (method->is_hidden()) {
1755 if (skip_hidden) continue;
1756 }
1757 bt.push(method, bci, CHECK);
1758 total_count++;
1759 }
1760
1761 // Put completed stack trace into throwable object
1762 set_backtrace(throwable(), bt.backtrace());
1763 }
1764
1765 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method) {
1766 // No-op if stack trace is disabled
1767 if (!StackTraceInThrowable) {
1768 return;
1769 }
1770
1771 // Disable stack traces for some preallocated out of memory errors
1772 if (!Universe::should_fill_in_stack_trace(throwable)) {
1773 return;
1774 }
1775
1776 PRESERVE_EXCEPTION_MARK;
1777
1778 JavaThread* thread = JavaThread::active();
1779 fill_in_stack_trace(throwable, method, thread);
1780 // ignore exceptions thrown during stack trace filling
1781 CLEAR_PENDING_EXCEPTION;
1782 }
1783
1784 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
1785 // Allocate stack trace - backtrace is created but not filled in
1786
1787 // No-op if stack trace is disabled
1788 if (!StackTraceInThrowable) return;
1789 BacktraceBuilder bt(CHECK); // creates a backtrace
1790 set_backtrace(throwable(), bt.backtrace());
1791 }
1792
1793
1794 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
1795 // Fill in stack trace into preallocated backtrace (no GC)
1796
1797 // No-op if stack trace is disabled
1798 if (!StackTraceInThrowable) return;
1799
1800 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
1801
1802 JavaThread* THREAD = JavaThread::current();
1803
1804 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
1805 assert(backtrace.not_null(), "backtrace should have been preallocated");
1806
1807 ResourceMark rm(THREAD);
1808 vframeStream st(THREAD);
1809
1810 BacktraceBuilder bt(backtrace);
1811
1812 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
1813 // methods as preallocated errors aren't created by "java" code.
1814
1815 // fill in as much stack trace as possible
1816 typeArrayOop methods = BacktraceBuilder::get_methods(backtrace);
1817 int max_chunks = MIN2(methods->length(), (int)MaxJavaStackTraceDepth);
1818 int chunk_count = 0;
1819
1820 for (;!st.at_end(); st.next()) {
1821 bt.push(st.method(), st.bci(), CHECK);
1822 chunk_count++;
1823
1824 // Bail-out for deep stacks
1825 if (chunk_count >= max_chunks) break;
1826 }
1827
1828 // We support the Throwable immutability protocol defined for Java 7.
1829 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
1830 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized");
1831 }
1832
1833
1834 int java_lang_Throwable::get_stack_trace_depth(oop throwable, TRAPS) {
1835 if (throwable == NULL) {
1836 THROW_0(vmSymbols::java_lang_NullPointerException());
1837 }
1838 objArrayOop chunk = objArrayOop(backtrace(throwable));
1839 int depth = 0;
1840 if (chunk != NULL) {
1841 // Iterate over chunks and count full ones
1842 while (true) {
1843 objArrayOop next = objArrayOop(chunk->obj_at(trace_next_offset));
1844 if (next == NULL) break;
1845 depth += trace_chunk_size;
1846 chunk = next;
1847 }
1848 assert(chunk != NULL && chunk->obj_at(trace_next_offset) == NULL, "sanity check");
1849 // Count element in remaining partial chunk. NULL value for mirror
1850 // marks the end of the stack trace elements that are saved.
1851 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk);
1852 assert(mirrors != NULL, "sanity check");
1853 for (int i = 0; i < mirrors->length(); i++) {
1854 if (mirrors->obj_at(i) == NULL) break;
1855 depth++;
1856 }
1857 }
1858 return depth;
1859 }
1860
1861
1862 oop java_lang_Throwable::get_stack_trace_element(oop throwable, int index, TRAPS) {
1863 if (throwable == NULL) {
1864 THROW_0(vmSymbols::java_lang_NullPointerException());
1865 }
1866 if (index < 0) {
1867 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1868 }
1869 // Compute how many chunks to skip and index into actual chunk
1870 objArrayOop chunk = objArrayOop(backtrace(throwable));
1871 int skip_chunks = index / trace_chunk_size;
1872 int chunk_index = index % trace_chunk_size;
1873 while (chunk != NULL && skip_chunks > 0) {
1874 chunk = objArrayOop(chunk->obj_at(trace_next_offset));
1875 skip_chunks--;
1876 }
1877 if (chunk == NULL) {
1878 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1879 }
1880 // Get method id, bci, version, mirror and cpref from chunk
1881 typeArrayOop methods = BacktraceBuilder::get_methods(chunk);
1882 typeArrayOop bcis = BacktraceBuilder::get_bcis(chunk);
1883 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk);
1884 typeArrayOop cprefs = BacktraceBuilder::get_cprefs(chunk);
1885
1886 assert(methods != NULL && bcis != NULL && mirrors != NULL, "sanity check");
1887
1888 int method = methods->short_at(chunk_index);
1889 int version = version_at(bcis->int_at(chunk_index));
1890 int bci = bci_at(bcis->int_at(chunk_index));
1891 int cpref = cprefs->short_at(chunk_index);
1892 Handle mirror(THREAD, mirrors->obj_at(chunk_index));
1893
1894 // Chunk can be partial full
1895 if (mirror.is_null()) {
1896 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1897 }
1898 oop element = java_lang_StackTraceElement::create(mirror, method, version, bci, cpref, CHECK_0);
1899 return element;
1900 }
1901
1902 oop java_lang_StackTraceElement::create(Handle mirror, int method_id,
1903 int version, int bci, int cpref, TRAPS) {
1904 // Allocate java.lang.StackTraceElement instance
1905 Klass* k = SystemDictionary::StackTraceElement_klass();
1906 assert(k != NULL, "must be loaded in 1.4+");
1907 instanceKlassHandle ik (THREAD, k);
1908 if (ik->should_be_initialized()) {
1909 ik->initialize(CHECK_0);
1910 }
1911
1912 Handle element = ik->allocate_instance_handle(CHECK_0);
1913 // Fill in class name
1914 ResourceMark rm(THREAD);
1915 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
1916 const char* str = holder->external_name();
1917 oop classname = StringTable::intern((char*) str, CHECK_0);
1918 java_lang_StackTraceElement::set_declaringClass(element(), classname);
1919
1920 Method* method = holder->method_with_orig_idnum(method_id, version);
1921
1922 // The method can be NULL if the requested class version is gone
1923 Symbol* sym = (method != NULL) ? method->name() : holder->constants()->symbol_at(cpref);
1924
1925 // Fill in method name
1926 oop methodname = StringTable::intern(sym, CHECK_0);
1927 java_lang_StackTraceElement::set_methodName(element(), methodname);
1928
1929 if (!version_matches(method, version)) {
1930 // The method was redefined, accurate line number information isn't available
1931 java_lang_StackTraceElement::set_fileName(element(), NULL);
1932 java_lang_StackTraceElement::set_lineNumber(element(), -1);
1933 } else {
1934 // Fill in source file name and line number.
1935 Symbol* source = get_source_file_name(holder, version);
1936 if (ShowHiddenFrames && source == NULL)
1937 source = vmSymbols::unknown_class_name();
1938 oop filename = StringTable::intern(source, CHECK_0);
1939 java_lang_StackTraceElement::set_fileName(element(), filename);
1940
1941 int line_number = get_line_number(method, bci);
1942 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
1943 }
1944 return element();
1945 }
1946
1947 oop java_lang_StackTraceElement::create(methodHandle method, int bci, TRAPS) {
1948 Handle mirror (THREAD, method->method_holder()->java_mirror());
1949 int method_id = method->orig_method_idnum();
1950 int cpref = method->name_index();
1951 return create(mirror, method_id, method->constants()->version(), bci, cpref, THREAD);
1952 }
1953
1954 void java_lang_reflect_AccessibleObject::compute_offsets() {
1955 Klass* k = SystemDictionary::reflect_AccessibleObject_klass();
1956 compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature());
1957 }
1958
1959 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
1960 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1961 return (jboolean) reflect->bool_field(override_offset);
1962 }
1963
1964 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
1965 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1966 reflect->bool_field_put(override_offset, (int) value);
1967 }
1968
1969 void java_lang_reflect_Method::compute_offsets() {
1970 Klass* k = SystemDictionary::reflect_Method_klass();
1971 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
1972 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1973 compute_offset(returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature());
1974 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
1975 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
1976 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
1977 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
1978 // The generic signature and annotations fields are only present in 1.5
1979 signature_offset = -1;
1980 annotations_offset = -1;
1981 parameter_annotations_offset = -1;
1982 annotation_default_offset = -1;
1983 type_annotations_offset = -1;
1984 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
1985 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
1986 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
1987 compute_optional_offset(annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature());
1988 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
1989 }
1990
1991 Handle java_lang_reflect_Method::create(TRAPS) {
1992 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1993 Klass* klass = SystemDictionary::reflect_Method_klass();
1994 // This class is eagerly initialized during VM initialization, since we keep a refence
1995 // to one of the methods
1996 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
1997 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
1998 }
1999
2000 oop java_lang_reflect_Method::clazz(oop reflect) {
2001 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2002 return reflect->obj_field(clazz_offset);
2003 }
2004
2005 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
2006 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2007 reflect->obj_field_put(clazz_offset, value);
2008 }
2009
2010 int java_lang_reflect_Method::slot(oop reflect) {
2011 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2012 return reflect->int_field(slot_offset);
2013 }
2014
2015 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
2016 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2017 reflect->int_field_put(slot_offset, value);
2018 }
2019
2020 oop java_lang_reflect_Method::name(oop method) {
2021 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2022 return method->obj_field(name_offset);
2023 }
2024
2025 void java_lang_reflect_Method::set_name(oop method, oop value) {
2026 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2027 method->obj_field_put(name_offset, value);
2028 }
2029
2030 oop java_lang_reflect_Method::return_type(oop method) {
2031 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2032 return method->obj_field(returnType_offset);
2033 }
2034
2035 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
2036 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2037 method->obj_field_put(returnType_offset, value);
2038 }
2039
2040 oop java_lang_reflect_Method::parameter_types(oop method) {
2041 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2042 return method->obj_field(parameterTypes_offset);
2043 }
2044
2045 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
2046 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2047 method->obj_field_put(parameterTypes_offset, value);
2048 }
2049
2050 oop java_lang_reflect_Method::exception_types(oop method) {
2051 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2052 return method->obj_field(exceptionTypes_offset);
2053 }
2054
2055 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
2056 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2057 method->obj_field_put(exceptionTypes_offset, value);
2058 }
2059
2060 int java_lang_reflect_Method::modifiers(oop method) {
2061 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2062 return method->int_field(modifiers_offset);
2063 }
2064
2065 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
2066 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2067 method->int_field_put(modifiers_offset, value);
2068 }
2069
2070 bool java_lang_reflect_Method::has_signature_field() {
2071 return (signature_offset >= 0);
2072 }
2073
2074 oop java_lang_reflect_Method::signature(oop method) {
2075 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2076 assert(has_signature_field(), "signature field must be present");
2077 return method->obj_field(signature_offset);
2078 }
2079
2080 void java_lang_reflect_Method::set_signature(oop method, oop value) {
2081 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2082 assert(has_signature_field(), "signature field must be present");
2083 method->obj_field_put(signature_offset, value);
2084 }
2085
2086 bool java_lang_reflect_Method::has_annotations_field() {
2087 return (annotations_offset >= 0);
2088 }
2089
2090 oop java_lang_reflect_Method::annotations(oop method) {
2091 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2092 assert(has_annotations_field(), "annotations field must be present");
2093 return method->obj_field(annotations_offset);
2094 }
2095
2096 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
2097 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2098 assert(has_annotations_field(), "annotations field must be present");
2099 method->obj_field_put(annotations_offset, value);
2100 }
2101
2102 bool java_lang_reflect_Method::has_parameter_annotations_field() {
2103 return (parameter_annotations_offset >= 0);
2104 }
2105
2106 oop java_lang_reflect_Method::parameter_annotations(oop method) {
2107 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2108 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2109 return method->obj_field(parameter_annotations_offset);
2110 }
2111
2112 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
2113 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2114 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2115 method->obj_field_put(parameter_annotations_offset, value);
2116 }
2117
2118 bool java_lang_reflect_Method::has_annotation_default_field() {
2119 return (annotation_default_offset >= 0);
2120 }
2121
2122 oop java_lang_reflect_Method::annotation_default(oop method) {
2123 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2124 assert(has_annotation_default_field(), "annotation default field must be present");
2125 return method->obj_field(annotation_default_offset);
2126 }
2127
2128 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
2129 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2130 assert(has_annotation_default_field(), "annotation default field must be present");
2131 method->obj_field_put(annotation_default_offset, value);
2132 }
2133
2134 bool java_lang_reflect_Method::has_type_annotations_field() {
2135 return (type_annotations_offset >= 0);
2136 }
2137
2138 oop java_lang_reflect_Method::type_annotations(oop method) {
2139 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2140 assert(has_type_annotations_field(), "type_annotations field must be present");
2141 return method->obj_field(type_annotations_offset);
2142 }
2143
2144 void java_lang_reflect_Method::set_type_annotations(oop method, oop value) {
2145 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2146 assert(has_type_annotations_field(), "type_annotations field must be present");
2147 method->obj_field_put(type_annotations_offset, value);
2148 }
2149
2150 void java_lang_reflect_Constructor::compute_offsets() {
2151 Klass* k = SystemDictionary::reflect_Constructor_klass();
2152 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
2153 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
2154 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
2155 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
2156 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2157 // The generic signature and annotations fields are only present in 1.5
2158 signature_offset = -1;
2159 annotations_offset = -1;
2160 parameter_annotations_offset = -1;
2161 type_annotations_offset = -1;
2162 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
2163 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
2164 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
2165 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
2166 }
2167
2168 Handle java_lang_reflect_Constructor::create(TRAPS) {
2169 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2170 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
2171 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2172 instanceKlassHandle klass (THREAD, k);
2173 // Ensure it is initialized
2174 klass->initialize(CHECK_NH);
2175 return klass->allocate_instance_handle(THREAD);
2176 }
2177
2178 oop java_lang_reflect_Constructor::clazz(oop reflect) {
2179 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2180 return reflect->obj_field(clazz_offset);
2181 }
2182
2183 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
2184 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2185 reflect->obj_field_put(clazz_offset, value);
2186 }
2187
2188 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
2189 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2190 return constructor->obj_field(parameterTypes_offset);
2191 }
2192
2193 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
2194 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2195 constructor->obj_field_put(parameterTypes_offset, value);
2196 }
2197
2198 oop java_lang_reflect_Constructor::exception_types(oop constructor) {
2199 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2200 return constructor->obj_field(exceptionTypes_offset);
2201 }
2202
2203 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
2204 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2205 constructor->obj_field_put(exceptionTypes_offset, value);
2206 }
2207
2208 int java_lang_reflect_Constructor::slot(oop reflect) {
2209 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2210 return reflect->int_field(slot_offset);
2211 }
2212
2213 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
2214 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2215 reflect->int_field_put(slot_offset, value);
2216 }
2217
2218 int java_lang_reflect_Constructor::modifiers(oop constructor) {
2219 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2220 return constructor->int_field(modifiers_offset);
2221 }
2222
2223 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
2224 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2225 constructor->int_field_put(modifiers_offset, value);
2226 }
2227
2228 bool java_lang_reflect_Constructor::has_signature_field() {
2229 return (signature_offset >= 0);
2230 }
2231
2232 oop java_lang_reflect_Constructor::signature(oop constructor) {
2233 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2234 assert(has_signature_field(), "signature field must be present");
2235 return constructor->obj_field(signature_offset);
2236 }
2237
2238 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
2239 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2240 assert(has_signature_field(), "signature field must be present");
2241 constructor->obj_field_put(signature_offset, value);
2242 }
2243
2244 bool java_lang_reflect_Constructor::has_annotations_field() {
2245 return (annotations_offset >= 0);
2246 }
2247
2248 oop java_lang_reflect_Constructor::annotations(oop constructor) {
2249 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2250 assert(has_annotations_field(), "annotations field must be present");
2251 return constructor->obj_field(annotations_offset);
2252 }
2253
2254 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
2255 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2256 assert(has_annotations_field(), "annotations field must be present");
2257 constructor->obj_field_put(annotations_offset, value);
2258 }
2259
2260 bool java_lang_reflect_Constructor::has_parameter_annotations_field() {
2261 return (parameter_annotations_offset >= 0);
2262 }
2263
2264 oop java_lang_reflect_Constructor::parameter_annotations(oop method) {
2265 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2266 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2267 return method->obj_field(parameter_annotations_offset);
2268 }
2269
2270 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
2271 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2272 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2273 method->obj_field_put(parameter_annotations_offset, value);
2274 }
2275
2276 bool java_lang_reflect_Constructor::has_type_annotations_field() {
2277 return (type_annotations_offset >= 0);
2278 }
2279
2280 oop java_lang_reflect_Constructor::type_annotations(oop constructor) {
2281 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2282 assert(has_type_annotations_field(), "type_annotations field must be present");
2283 return constructor->obj_field(type_annotations_offset);
2284 }
2285
2286 void java_lang_reflect_Constructor::set_type_annotations(oop constructor, oop value) {
2287 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2288 assert(has_type_annotations_field(), "type_annotations field must be present");
2289 constructor->obj_field_put(type_annotations_offset, value);
2290 }
2291
2292 void java_lang_reflect_Field::compute_offsets() {
2293 Klass* k = SystemDictionary::reflect_Field_klass();
2294 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
2295 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2296 compute_offset(type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature());
2297 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
2298 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2299 // The generic signature and annotations fields are only present in 1.5
2300 signature_offset = -1;
2301 annotations_offset = -1;
2302 type_annotations_offset = -1;
2303 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
2304 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
2305 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
2306 }
2307
2308 Handle java_lang_reflect_Field::create(TRAPS) {
2309 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2310 Symbol* name = vmSymbols::java_lang_reflect_Field();
2311 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2312 instanceKlassHandle klass (THREAD, k);
2313 // Ensure it is initialized
2314 klass->initialize(CHECK_NH);
2315 return klass->allocate_instance_handle(THREAD);
2316 }
2317
2318 oop java_lang_reflect_Field::clazz(oop reflect) {
2319 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2320 return reflect->obj_field(clazz_offset);
2321 }
2322
2323 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
2324 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2325 reflect->obj_field_put(clazz_offset, value);
2326 }
2327
2328 oop java_lang_reflect_Field::name(oop field) {
2329 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2330 return field->obj_field(name_offset);
2331 }
2332
2333 void java_lang_reflect_Field::set_name(oop field, oop value) {
2334 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2335 field->obj_field_put(name_offset, value);
2336 }
2337
2338 oop java_lang_reflect_Field::type(oop field) {
2339 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2340 return field->obj_field(type_offset);
2341 }
2342
2343 void java_lang_reflect_Field::set_type(oop field, oop value) {
2344 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2345 field->obj_field_put(type_offset, value);
2346 }
2347
2348 int java_lang_reflect_Field::slot(oop reflect) {
2349 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2350 return reflect->int_field(slot_offset);
2351 }
2352
2353 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
2354 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2355 reflect->int_field_put(slot_offset, value);
2356 }
2357
2358 int java_lang_reflect_Field::modifiers(oop field) {
2359 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2360 return field->int_field(modifiers_offset);
2361 }
2362
2363 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
2364 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2365 field->int_field_put(modifiers_offset, value);
2366 }
2367
2368 bool java_lang_reflect_Field::has_signature_field() {
2369 return (signature_offset >= 0);
2370 }
2371
2372 oop java_lang_reflect_Field::signature(oop field) {
2373 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2374 assert(has_signature_field(), "signature field must be present");
2375 return field->obj_field(signature_offset);
2376 }
2377
2378 void java_lang_reflect_Field::set_signature(oop field, oop value) {
2379 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2380 assert(has_signature_field(), "signature field must be present");
2381 field->obj_field_put(signature_offset, value);
2382 }
2383
2384 bool java_lang_reflect_Field::has_annotations_field() {
2385 return (annotations_offset >= 0);
2386 }
2387
2388 oop java_lang_reflect_Field::annotations(oop field) {
2389 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2390 assert(has_annotations_field(), "annotations field must be present");
2391 return field->obj_field(annotations_offset);
2392 }
2393
2394 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
2395 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2396 assert(has_annotations_field(), "annotations field must be present");
2397 field->obj_field_put(annotations_offset, value);
2398 }
2399
2400 bool java_lang_reflect_Field::has_type_annotations_field() {
2401 return (type_annotations_offset >= 0);
2402 }
2403
2404 oop java_lang_reflect_Field::type_annotations(oop field) {
2405 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2406 assert(has_type_annotations_field(), "type_annotations field must be present");
2407 return field->obj_field(type_annotations_offset);
2408 }
2409
2410 void java_lang_reflect_Field::set_type_annotations(oop field, oop value) {
2411 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2412 assert(has_type_annotations_field(), "type_annotations field must be present");
2413 field->obj_field_put(type_annotations_offset, value);
2414 }
2415
2416 void sun_reflect_ConstantPool::compute_offsets() {
2417 Klass* k = SystemDictionary::reflect_ConstantPool_klass();
2418 // This null test can be removed post beta
2419 if (k != NULL) {
2420 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
2421 compute_offset(_oop_offset, k, vmSymbols::ConstantPool_name(), vmSymbols::object_signature());
2422 }
2423 }
2424
2425 void java_lang_reflect_Parameter::compute_offsets() {
2426 Klass* k = SystemDictionary::reflect_Parameter_klass();
2427 if(NULL != k) {
2428 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2429 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2430 compute_offset(index_offset, k, vmSymbols::index_name(), vmSymbols::int_signature());
2431 compute_offset(executable_offset, k, vmSymbols::executable_name(), vmSymbols::executable_signature());
2432 }
2433 }
2434
2435 Handle java_lang_reflect_Parameter::create(TRAPS) {
2436 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2437 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
2438 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2439 instanceKlassHandle klass (THREAD, k);
2440 // Ensure it is initialized
2441 klass->initialize(CHECK_NH);
2442 return klass->allocate_instance_handle(THREAD);
2443 }
2444
2445 oop java_lang_reflect_Parameter::name(oop param) {
2446 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2447 return param->obj_field(name_offset);
2448 }
2449
2450 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
2451 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2452 param->obj_field_put(name_offset, value);
2453 }
2454
2455 int java_lang_reflect_Parameter::modifiers(oop param) {
2456 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2457 return param->int_field(modifiers_offset);
2458 }
2459
2460 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
2461 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2462 param->int_field_put(modifiers_offset, value);
2463 }
2464
2465 int java_lang_reflect_Parameter::index(oop param) {
2466 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2467 return param->int_field(index_offset);
2468 }
2469
2470 void java_lang_reflect_Parameter::set_index(oop param, int value) {
2471 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2472 param->int_field_put(index_offset, value);
2473 }
2474
2475 oop java_lang_reflect_Parameter::executable(oop param) {
2476 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2477 return param->obj_field(executable_offset);
2478 }
2479
2480 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
2481 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2482 param->obj_field_put(executable_offset, value);
2483 }
2484
2485
2486 Handle sun_reflect_ConstantPool::create(TRAPS) {
2487 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2488 Klass* k = SystemDictionary::reflect_ConstantPool_klass();
2489 instanceKlassHandle klass (THREAD, k);
2490 // Ensure it is initialized
2491 klass->initialize(CHECK_NH);
2492 return klass->allocate_instance_handle(THREAD);
2493 }
2494
2495
2496 void sun_reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
2497 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2498 oop mirror = value->pool_holder()->java_mirror();
2499 // Save the mirror to get back the constant pool.
2500 reflect->obj_field_put(_oop_offset, mirror);
2501 }
2502
2503 ConstantPool* sun_reflect_ConstantPool::get_cp(oop reflect) {
2504 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2505
2506 oop mirror = reflect->obj_field(_oop_offset);
2507 Klass* k = java_lang_Class::as_Klass(mirror);
2508 assert(k->oop_is_instance(), "Must be");
2509
2510 // Get the constant pool back from the klass. Since class redefinition
2511 // merges the new constant pool into the old, this is essentially the
2512 // same constant pool as the original. If constant pool merging is
2513 // no longer done in the future, this will have to change to save
2514 // the original.
2515 return InstanceKlass::cast(k)->constants();
2516 }
2517
2518 void sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
2519 Klass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass();
2520 // This null test can be removed post beta
2521 if (k != NULL) {
2522 compute_offset(_base_offset, k,
2523 vmSymbols::base_name(), vmSymbols::object_signature());
2524 }
2525 }
2526
2527 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
2528 Klass* k = SystemDictionary::box_klass(type);
2529 if (k == NULL) return NULL;
2530 instanceKlassHandle h (THREAD, k);
2531 if (!h->is_initialized()) h->initialize(CHECK_0);
2532 return h->allocate_instance(THREAD);
2533 }
2534
2535
2536 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
2537 oop box = initialize_and_allocate(type, CHECK_0);
2538 if (box == NULL) return NULL;
2539 switch (type) {
2540 case T_BOOLEAN:
2541 box->bool_field_put(value_offset, value->z);
2542 break;
2543 case T_CHAR:
2544 box->char_field_put(value_offset, value->c);
2545 break;
2546 case T_FLOAT:
2547 box->float_field_put(value_offset, value->f);
2548 break;
2549 case T_DOUBLE:
2550 box->double_field_put(long_value_offset, value->d);
2551 break;
2552 case T_BYTE:
2553 box->byte_field_put(value_offset, value->b);
2554 break;
2555 case T_SHORT:
2556 box->short_field_put(value_offset, value->s);
2557 break;
2558 case T_INT:
2559 box->int_field_put(value_offset, value->i);
2560 break;
2561 case T_LONG:
2562 box->long_field_put(long_value_offset, value->j);
2563 break;
2564 default:
2565 return NULL;
2566 }
2567 return box;
2568 }
2569
2570
2571 BasicType java_lang_boxing_object::basic_type(oop box) {
2572 if (box == NULL) return T_ILLEGAL;
2573 BasicType type = SystemDictionary::box_klass_type(box->klass());
2574 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
2575 return T_ILLEGAL;
2576 return type;
2577 }
2578
2579
2580 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
2581 BasicType type = SystemDictionary::box_klass_type(box->klass());
2582 switch (type) {
2583 case T_BOOLEAN:
2584 value->z = box->bool_field(value_offset);
2585 break;
2586 case T_CHAR:
2587 value->c = box->char_field(value_offset);
2588 break;
2589 case T_FLOAT:
2590 value->f = box->float_field(value_offset);
2591 break;
2592 case T_DOUBLE:
2593 value->d = box->double_field(long_value_offset);
2594 break;
2595 case T_BYTE:
2596 value->b = box->byte_field(value_offset);
2597 break;
2598 case T_SHORT:
2599 value->s = box->short_field(value_offset);
2600 break;
2601 case T_INT:
2602 value->i = box->int_field(value_offset);
2603 break;
2604 case T_LONG:
2605 value->j = box->long_field(long_value_offset);
2606 break;
2607 default:
2608 return T_ILLEGAL;
2609 } // end switch
2610 return type;
2611 }
2612
2613
2614 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
2615 BasicType type = SystemDictionary::box_klass_type(box->klass());
2616 switch (type) {
2617 case T_BOOLEAN:
2618 box->bool_field_put(value_offset, value->z);
2619 break;
2620 case T_CHAR:
2621 box->char_field_put(value_offset, value->c);
2622 break;
2623 case T_FLOAT:
2624 box->float_field_put(value_offset, value->f);
2625 break;
2626 case T_DOUBLE:
2627 box->double_field_put(long_value_offset, value->d);
2628 break;
2629 case T_BYTE:
2630 box->byte_field_put(value_offset, value->b);
2631 break;
2632 case T_SHORT:
2633 box->short_field_put(value_offset, value->s);
2634 break;
2635 case T_INT:
2636 box->int_field_put(value_offset, value->i);
2637 break;
2638 case T_LONG:
2639 box->long_field_put(long_value_offset, value->j);
2640 break;
2641 default:
2642 return T_ILLEGAL;
2643 } // end switch
2644 return type;
2645 }
2646
2647
2648 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
2649 switch (type) {
2650 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
2651 case T_CHAR: st->print("%d", value->c); break;
2652 case T_BYTE: st->print("%d", value->b); break;
2653 case T_SHORT: st->print("%d", value->s); break;
2654 case T_INT: st->print("%d", value->i); break;
2655 case T_LONG: st->print(INT64_FORMAT, value->j); break;
2656 case T_FLOAT: st->print("%f", value->f); break;
2657 case T_DOUBLE: st->print("%lf", value->d); break;
2658 default: st->print("type %d?", type); break;
2659 }
2660 }
2661
2662
2663 // Support for java_lang_ref_Reference
2664 HeapWord *java_lang_ref_Reference::pending_list_lock_addr() {
2665 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2666 address addr = ik->static_field_addr(static_lock_offset);
2667 return (HeapWord*) addr;
2668 }
2669
2670 oop java_lang_ref_Reference::pending_list_lock() {
2671 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2672 address addr = ik->static_field_addr(static_lock_offset);
2673 if (UseCompressedOops) {
2674 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
2675 } else {
2676 return oopDesc::load_decode_heap_oop((oop*)addr);
2677 }
2678 }
2679
2680 HeapWord *java_lang_ref_Reference::pending_list_addr() {
2681 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2682 address addr = ik->static_field_addr(static_pending_offset);
2683 // XXX This might not be HeapWord aligned, almost rather be char *.
2684 return (HeapWord*)addr;
2685 }
2686
2687 oop java_lang_ref_Reference::pending_list() {
2688 char *addr = (char *)pending_list_addr();
2689 if (UseCompressedOops) {
2690 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
2691 } else {
2692 return oopDesc::load_decode_heap_oop((oop*)addr);
2693 }
2694 }
2695
2696
2697 // Support for java_lang_ref_SoftReference
2698
2699 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
2700 return ref->long_field(timestamp_offset);
2701 }
2702
2703 jlong java_lang_ref_SoftReference::clock() {
2704 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass());
2705 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
2706 return *offset;
2707 }
2708
2709 void java_lang_ref_SoftReference::set_clock(jlong value) {
2710 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass());
2711 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
2712 *offset = value;
2713 }
2714
2715 // Support for java_lang_invoke_DirectMethodHandle
2716
2717 int java_lang_invoke_DirectMethodHandle::_member_offset;
2718
2719 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
2720 oop member_name = NULL;
2721 bool is_dmh = dmh->is_oop() && java_lang_invoke_DirectMethodHandle::is_instance(dmh);
2722 assert(is_dmh, "a DirectMethodHandle oop is expected");
2723 if (is_dmh) {
2724 member_name = dmh->obj_field(member_offset_in_bytes());
2725 }
2726 return member_name;
2727 }
2728
2729 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
2730 Klass* klass_oop = SystemDictionary::DirectMethodHandle_klass();
2731 if (klass_oop != NULL) {
2732 compute_offset(_member_offset, klass_oop, vmSymbols::member_name(), vmSymbols::java_lang_invoke_MemberName_signature());
2733 }
2734 }
2735
2736 // Support for java_lang_invoke_MethodHandle
2737
2738 int java_lang_invoke_MethodHandle::_type_offset;
2739 int java_lang_invoke_MethodHandle::_form_offset;
2740
2741 int java_lang_invoke_MemberName::_clazz_offset;
2742 int java_lang_invoke_MemberName::_name_offset;
2743 int java_lang_invoke_MemberName::_type_offset;
2744 int java_lang_invoke_MemberName::_flags_offset;
2745 int java_lang_invoke_MemberName::_vmtarget_offset;
2746 int java_lang_invoke_MemberName::_vmloader_offset;
2747 int java_lang_invoke_MemberName::_vmindex_offset;
2748
2749 int java_lang_invoke_LambdaForm::_vmentry_offset;
2750
2751 void java_lang_invoke_MethodHandle::compute_offsets() {
2752 Klass* klass_oop = SystemDictionary::MethodHandle_klass();
2753 if (klass_oop != NULL) {
2754 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::java_lang_invoke_MethodType_signature());
2755 compute_offset(_form_offset, klass_oop, vmSymbols::form_name(), vmSymbols::java_lang_invoke_LambdaForm_signature());
2756 }
2757 }
2758
2759 void java_lang_invoke_MemberName::compute_offsets() {
2760 Klass* klass_oop = SystemDictionary::MemberName_klass();
2761 if (klass_oop != NULL) {
2762 compute_offset(_clazz_offset, klass_oop, vmSymbols::clazz_name(), vmSymbols::class_signature());
2763 compute_offset(_name_offset, klass_oop, vmSymbols::name_name(), vmSymbols::string_signature());
2764 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::object_signature());
2765 compute_offset(_flags_offset, klass_oop, vmSymbols::flags_name(), vmSymbols::int_signature());
2766 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2767 }
2768 }
2769
2770 void java_lang_invoke_LambdaForm::compute_offsets() {
2771 Klass* klass_oop = SystemDictionary::LambdaForm_klass();
2772 if (klass_oop != NULL) {
2773 compute_offset(_vmentry_offset, klass_oop, vmSymbols::vmentry_name(), vmSymbols::java_lang_invoke_MemberName_signature());
2774 }
2775 }
2776
2777 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
2778 return obj != NULL && is_subclass(obj->klass());
2779 }
2780
2781
2782 oop java_lang_invoke_MethodHandle::type(oop mh) {
2783 return mh->obj_field(_type_offset);
2784 }
2785
2786 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
2787 mh->obj_field_put(_type_offset, mtype);
2788 }
2789
2790 oop java_lang_invoke_MethodHandle::form(oop mh) {
2791 assert(_form_offset != 0, "");
2792 return mh->obj_field(_form_offset);
2793 }
2794
2795 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
2796 assert(_form_offset != 0, "");
2797 mh->obj_field_put(_form_offset, lform);
2798 }
2799
2800 /// MemberName accessors
2801
2802 oop java_lang_invoke_MemberName::clazz(oop mname) {
2803 assert(is_instance(mname), "wrong type");
2804 return mname->obj_field(_clazz_offset);
2805 }
2806
2807 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
2808 assert(is_instance(mname), "wrong type");
2809 mname->obj_field_put(_clazz_offset, clazz);
2810 }
2811
2812 oop java_lang_invoke_MemberName::name(oop mname) {
2813 assert(is_instance(mname), "wrong type");
2814 return mname->obj_field(_name_offset);
2815 }
2816
2817 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
2818 assert(is_instance(mname), "wrong type");
2819 mname->obj_field_put(_name_offset, name);
2820 }
2821
2822 oop java_lang_invoke_MemberName::type(oop mname) {
2823 assert(is_instance(mname), "wrong type");
2824 return mname->obj_field(_type_offset);
2825 }
2826
2827 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
2828 assert(is_instance(mname), "wrong type");
2829 mname->obj_field_put(_type_offset, type);
2830 }
2831
2832 int java_lang_invoke_MemberName::flags(oop mname) {
2833 assert(is_instance(mname), "wrong type");
2834 return mname->int_field(_flags_offset);
2835 }
2836
2837 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
2838 assert(is_instance(mname), "wrong type");
2839 mname->int_field_put(_flags_offset, flags);
2840 }
2841
2842 Metadata* java_lang_invoke_MemberName::vmtarget(oop mname) {
2843 assert(is_instance(mname), "wrong type");
2844 return (Metadata*)mname->address_field(_vmtarget_offset);
2845 }
2846
2847 bool java_lang_invoke_MemberName::is_method(oop mname) {
2848 assert(is_instance(mname), "must be MemberName");
2849 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
2850 }
2851
2852 void java_lang_invoke_MemberName::set_vmtarget(oop mname, Metadata* ref) {
2853 assert(is_instance(mname), "wrong type");
2854 // check the type of the vmtarget
2855 oop dependency = NULL;
2856 if (ref != NULL) {
2857 switch (flags(mname) & (MN_IS_METHOD |
2858 MN_IS_CONSTRUCTOR |
2859 MN_IS_FIELD)) {
2860 case MN_IS_METHOD:
2861 case MN_IS_CONSTRUCTOR:
2862 assert(ref->is_method(), "should be a method");
2863 dependency = ((Method*)ref)->method_holder()->java_mirror();
2864 break;
2865 case MN_IS_FIELD:
2866 assert(ref->is_klass(), "should be a class");
2867 dependency = ((Klass*)ref)->java_mirror();
2868 break;
2869 default:
2870 ShouldNotReachHere();
2871 }
2872 }
2873 mname->address_field_put(_vmtarget_offset, (address)ref);
2874 // Add a reference to the loader (actually mirror because anonymous classes will not have
2875 // distinct loaders) to ensure the metadata is kept alive
2876 // This mirror may be different than the one in clazz field.
2877 mname->obj_field_put(_vmloader_offset, dependency);
2878 }
2879
2880 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
2881 assert(is_instance(mname), "wrong type");
2882 return (intptr_t) mname->address_field(_vmindex_offset);
2883 }
2884
2885 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
2886 assert(is_instance(mname), "wrong type");
2887 mname->address_field_put(_vmindex_offset, (address) index);
2888 }
2889
2890 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
2891 assert(is_instance(lform), "wrong type");
2892 return lform->obj_field(_vmentry_offset);
2893 }
2894
2895
2896 // Support for java_lang_invoke_MethodType
2897
2898 int java_lang_invoke_MethodType::_rtype_offset;
2899 int java_lang_invoke_MethodType::_ptypes_offset;
2900
2901 void java_lang_invoke_MethodType::compute_offsets() {
2902 Klass* k = SystemDictionary::MethodType_klass();
2903 if (k != NULL) {
2904 compute_offset(_rtype_offset, k, vmSymbols::rtype_name(), vmSymbols::class_signature());
2905 compute_offset(_ptypes_offset, k, vmSymbols::ptypes_name(), vmSymbols::class_array_signature());
2906 }
2907 }
2908
2909 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
2910 st->print("(");
2911 objArrayOop pts = ptypes(mt);
2912 for (int i = 0, limit = pts->length(); i < limit; i++) {
2913 java_lang_Class::print_signature(pts->obj_at(i), st);
2914 }
2915 st->print(")");
2916 java_lang_Class::print_signature(rtype(mt), st);
2917 }
2918
2919 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) {
2920 ResourceMark rm;
2921 stringStream buffer(128);
2922 print_signature(mt, &buffer);
2923 const char* sigstr = buffer.base();
2924 int siglen = (int) buffer.size();
2925 Symbol *name;
2926 if (!intern_if_not_found) {
2927 name = SymbolTable::probe(sigstr, siglen);
2928 } else {
2929 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
2930 }
2931 return name;
2932 }
2933
2934 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
2935 if (mt1 == mt2)
2936 return true;
2937 if (rtype(mt1) != rtype(mt2))
2938 return false;
2939 if (ptype_count(mt1) != ptype_count(mt2))
2940 return false;
2941 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
2942 if (ptype(mt1, i) != ptype(mt2, i))
2943 return false;
2944 }
2945 return true;
2946 }
2947
2948 oop java_lang_invoke_MethodType::rtype(oop mt) {
2949 assert(is_instance(mt), "must be a MethodType");
2950 return mt->obj_field(_rtype_offset);
2951 }
2952
2953 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
2954 assert(is_instance(mt), "must be a MethodType");
2955 return (objArrayOop) mt->obj_field(_ptypes_offset);
2956 }
2957
2958 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
2959 return ptypes(mt)->obj_at(idx);
2960 }
2961
2962 int java_lang_invoke_MethodType::ptype_count(oop mt) {
2963 return ptypes(mt)->length();
2964 }
2965
2966 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
2967 objArrayOop pts = ptypes(mt);
2968 int count = pts->length();
2969 int slots = 0;
2970 for (int i = 0; i < count; i++) {
2971 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
2972 slots += type2size[bt];
2973 }
2974 return slots;
2975 }
2976
2977 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
2978 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
2979 return type2size[bt];
2980 }
2981
2982
2983 // Support for java_lang_invoke_CallSite
2984
2985 int java_lang_invoke_CallSite::_target_offset;
2986 int java_lang_invoke_CallSite::_context_offset;
2987
2988 void java_lang_invoke_CallSite::compute_offsets() {
2989 Klass* k = SystemDictionary::CallSite_klass();
2990 if (k != NULL) {
2991 compute_offset(_target_offset, k, vmSymbols::target_name(), vmSymbols::java_lang_invoke_MethodHandle_signature());
2992 compute_offset(_context_offset, k, vmSymbols::context_name(),
2993 vmSymbols::java_lang_invoke_MethodHandleNatives_CallSiteContext_signature());
2994 }
2995 }
2996
2997 oop java_lang_invoke_CallSite::context(oop call_site) {
2998 assert(java_lang_invoke_CallSite::is_instance(call_site), "");
2999
3000 oop dep_oop = call_site->obj_field(_context_offset);
3001 return dep_oop;
3002 }
3003
3004 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext
3005
3006 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset;
3007
3008 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() {
3009 Klass* k = SystemDictionary::Context_klass();
3010 if (k != NULL) {
3011 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3012 }
3013 }
3014
3015 nmethodBucket* java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) {
3016 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), "");
3017 return (nmethodBucket*) (address) call_site->long_field(_vmdependencies_offset);
3018 }
3019
3020 void java_lang_invoke_MethodHandleNatives_CallSiteContext::set_vmdependencies(oop call_site, nmethodBucket* context) {
3021 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), "");
3022 call_site->long_field_put(_vmdependencies_offset, (jlong) (address) context);
3023 }
3024
3025 // Support for java_security_AccessControlContext
3026
3027 int java_security_AccessControlContext::_context_offset = 0;
3028 int java_security_AccessControlContext::_privilegedContext_offset = 0;
3029 int java_security_AccessControlContext::_isPrivileged_offset = 0;
3030 int java_security_AccessControlContext::_isAuthorized_offset = -1;
3031
3032 void java_security_AccessControlContext::compute_offsets() {
3033 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
3034 fieldDescriptor fd;
3035 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass());
3036
3037 if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) {
3038 fatal("Invalid layout of java.security.AccessControlContext");
3039 }
3040 _context_offset = fd.offset();
3041
3042 if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) {
3043 fatal("Invalid layout of java.security.AccessControlContext");
3044 }
3045 _privilegedContext_offset = fd.offset();
3046
3047 if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) {
3048 fatal("Invalid layout of java.security.AccessControlContext");
3049 }
3050 _isPrivileged_offset = fd.offset();
3051
3052 // The offset may not be present for bootstrapping with older JDK.
3053 if (ik->find_local_field(vmSymbols::isAuthorized_name(), vmSymbols::bool_signature(), &fd)) {
3054 _isAuthorized_offset = fd.offset();
3055 }
3056 }
3057
3058
3059 bool java_security_AccessControlContext::is_authorized(Handle context) {
3060 assert(context.not_null() && context->klass() == SystemDictionary::AccessControlContext_klass(), "Invalid type");
3061 assert(_isAuthorized_offset != -1, "should be set");
3062 return context->bool_field(_isAuthorized_offset) != 0;
3063 }
3064
3065 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
3066 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
3067 // Ensure klass is initialized
3068 InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->initialize(CHECK_0);
3069 // Allocate result
3070 oop result = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->allocate_instance(CHECK_0);
3071 // Fill in values
3072 result->obj_field_put(_context_offset, context());
3073 result->obj_field_put(_privilegedContext_offset, privileged_context());
3074 result->bool_field_put(_isPrivileged_offset, isPrivileged);
3075 // whitelist AccessControlContexts created by the JVM if present
3076 if (_isAuthorized_offset != -1) {
3077 result->bool_field_put(_isAuthorized_offset, true);
3078 }
3079 return result;
3080 }
3081
3082
3083 // Support for java_lang_ClassLoader
3084
3085 bool java_lang_ClassLoader::offsets_computed = false;
3086 int java_lang_ClassLoader::_loader_data_offset = -1;
3087 int java_lang_ClassLoader::parallelCapable_offset = -1;
3088
3089 ClassLoaderData** java_lang_ClassLoader::loader_data_addr(oop loader) {
3090 assert(loader != NULL && loader->is_oop(), "loader must be oop");
3091 return (ClassLoaderData**) loader->address_field_addr(_loader_data_offset);
3092 }
3093
3094 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
3095 return *java_lang_ClassLoader::loader_data_addr(loader);
3096 }
3097
3098 void java_lang_ClassLoader::compute_offsets() {
3099 assert(!offsets_computed, "offsets should be initialized only once");
3100 offsets_computed = true;
3101
3102 // The field indicating parallelCapable (parallelLockMap) is only present starting in 7,
3103 Klass* k1 = SystemDictionary::ClassLoader_klass();
3104 compute_optional_offset(parallelCapable_offset,
3105 k1, vmSymbols::parallelCapable_name(), vmSymbols::concurrenthashmap_signature());
3106
3107 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3108 }
3109
3110 oop java_lang_ClassLoader::parent(oop loader) {
3111 assert(is_instance(loader), "loader must be oop");
3112 return loader->obj_field(parent_offset);
3113 }
3114
3115 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
3116 assert(is_instance(loader), "loader must be oop");
3117 assert(cl == NULL || is_instance(cl), "cl argument must be oop");
3118 oop acl = loader;
3119 debug_only(jint loop_count = 0);
3120 // This loop taken verbatim from ClassLoader.java:
3121 do {
3122 acl = parent(acl);
3123 if (cl == acl) {
3124 return true;
3125 }
3126 assert(++loop_count > 0, "loop_count overflow");
3127 } while (acl != NULL);
3128 return false;
3129 }
3130
3131 bool java_lang_ClassLoader::is_instance(oop obj) {
3132 return obj != NULL && is_subclass(obj->klass());
3133 }
3134
3135
3136 // For class loader classes, parallelCapable defined
3137 // based on non-null field
3138 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
3139 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
3140 if (parallelCapable_offset == -1) {
3141 // Default for backward compatibility is false
3142 return false;
3143 }
3144 return (class_loader->obj_field(parallelCapable_offset) != NULL);
3145 }
3146
3147 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
3148 // Fix for 4474172; see evaluation for more details
3149 loader = non_reflection_class_loader(loader);
3150
3151 oop cl = SystemDictionary::java_system_loader();
3152 while(cl != NULL) {
3153 if (cl == loader) return true;
3154 cl = parent(cl);
3155 }
3156 return false;
3157 }
3158
3159 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
3160 if (loader != NULL) {
3161 // See whether this is one of the class loaders associated with
3162 // the generated bytecodes for reflection, and if so, "magically"
3163 // delegate to its parent to prevent class loading from occurring
3164 // in places where applications using reflection didn't expect it.
3165 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass();
3166 // This might be null in non-1.4 JDKs
3167 if (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)) {
3168 return parent(loader);
3169 }
3170 }
3171 return loader;
3172 }
3173
3174
3175 // Support for java_lang_System
3176 int java_lang_System::in_offset_in_bytes() {
3177 return (InstanceMirrorKlass::offset_of_static_fields() + static_in_offset);
3178 }
3179
3180
3181 int java_lang_System::out_offset_in_bytes() {
3182 return (InstanceMirrorKlass::offset_of_static_fields() + static_out_offset);
3183 }
3184
3185
3186 int java_lang_System::err_offset_in_bytes() {
3187 return (InstanceMirrorKlass::offset_of_static_fields() + static_err_offset);
3188 }
3189
3190
3191 bool java_lang_System::has_security_manager() {
3192 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::System_klass());
3193 address addr = ik->static_field_addr(static_security_offset);
3194 if (UseCompressedOops) {
3195 return oopDesc::load_decode_heap_oop((narrowOop *)addr) != NULL;
3196 } else {
3197 return oopDesc::load_decode_heap_oop((oop*)addr) != NULL;
3198 }
3199 }
3200
3201 int java_lang_Class::_klass_offset;
3202 int java_lang_Class::_array_klass_offset;
3203 int java_lang_Class::_oop_size_offset;
3204 int java_lang_Class::_static_oop_field_count_offset;
3205 int java_lang_Class::_class_loader_offset;
3206 int java_lang_Class::_protection_domain_offset;
3207 int java_lang_Class::_component_mirror_offset;
3208 int java_lang_Class::_init_lock_offset;
3209 int java_lang_Class::_signers_offset;
3210 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL;
3211 int java_lang_Throwable::backtrace_offset;
3212 int java_lang_Throwable::detailMessage_offset;
3213 int java_lang_Throwable::cause_offset;
3214 int java_lang_Throwable::stackTrace_offset;
3215 int java_lang_Throwable::static_unassigned_stacktrace_offset;
3216 int java_lang_reflect_AccessibleObject::override_offset;
3217 int java_lang_reflect_Method::clazz_offset;
3218 int java_lang_reflect_Method::name_offset;
3219 int java_lang_reflect_Method::returnType_offset;
3220 int java_lang_reflect_Method::parameterTypes_offset;
3221 int java_lang_reflect_Method::exceptionTypes_offset;
3222 int java_lang_reflect_Method::slot_offset;
3223 int java_lang_reflect_Method::modifiers_offset;
3224 int java_lang_reflect_Method::signature_offset;
3225 int java_lang_reflect_Method::annotations_offset;
3226 int java_lang_reflect_Method::parameter_annotations_offset;
3227 int java_lang_reflect_Method::annotation_default_offset;
3228 int java_lang_reflect_Method::type_annotations_offset;
3229 int java_lang_reflect_Constructor::clazz_offset;
3230 int java_lang_reflect_Constructor::parameterTypes_offset;
3231 int java_lang_reflect_Constructor::exceptionTypes_offset;
3232 int java_lang_reflect_Constructor::slot_offset;
3233 int java_lang_reflect_Constructor::modifiers_offset;
3234 int java_lang_reflect_Constructor::signature_offset;
3235 int java_lang_reflect_Constructor::annotations_offset;
3236 int java_lang_reflect_Constructor::parameter_annotations_offset;
3237 int java_lang_reflect_Constructor::type_annotations_offset;
3238 int java_lang_reflect_Field::clazz_offset;
3239 int java_lang_reflect_Field::name_offset;
3240 int java_lang_reflect_Field::type_offset;
3241 int java_lang_reflect_Field::slot_offset;
3242 int java_lang_reflect_Field::modifiers_offset;
3243 int java_lang_reflect_Field::signature_offset;
3244 int java_lang_reflect_Field::annotations_offset;
3245 int java_lang_reflect_Field::type_annotations_offset;
3246 int java_lang_reflect_Parameter::name_offset;
3247 int java_lang_reflect_Parameter::modifiers_offset;
3248 int java_lang_reflect_Parameter::index_offset;
3249 int java_lang_reflect_Parameter::executable_offset;
3250 int java_lang_boxing_object::value_offset;
3251 int java_lang_boxing_object::long_value_offset;
3252 int java_lang_ref_Reference::referent_offset;
3253 int java_lang_ref_Reference::queue_offset;
3254 int java_lang_ref_Reference::next_offset;
3255 int java_lang_ref_Reference::discovered_offset;
3256 int java_lang_ref_Reference::static_lock_offset;
3257 int java_lang_ref_Reference::static_pending_offset;
3258 int java_lang_ref_Reference::number_of_fake_oop_fields;
3259 int java_lang_ref_SoftReference::timestamp_offset;
3260 int java_lang_ref_SoftReference::static_clock_offset;
3261 int java_lang_ClassLoader::parent_offset;
3262 int java_lang_System::static_in_offset;
3263 int java_lang_System::static_out_offset;
3264 int java_lang_System::static_err_offset;
3265 int java_lang_System::static_security_offset;
3266 int java_lang_StackTraceElement::declaringClass_offset;
3267 int java_lang_StackTraceElement::methodName_offset;
3268 int java_lang_StackTraceElement::fileName_offset;
3269 int java_lang_StackTraceElement::lineNumber_offset;
3270 int java_lang_AssertionStatusDirectives::classes_offset;
3271 int java_lang_AssertionStatusDirectives::classEnabled_offset;
3272 int java_lang_AssertionStatusDirectives::packages_offset;
3273 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
3274 int java_lang_AssertionStatusDirectives::deflt_offset;
3275 int java_nio_Buffer::_limit_offset;
3276 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0;
3277 int sun_reflect_ConstantPool::_oop_offset;
3278 int sun_reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
3279
3280
3281 // Support for java_lang_StackTraceElement
3282
3283 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
3284 element->obj_field_put(fileName_offset, value);
3285 }
3286
3287 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
3288 element->obj_field_put(declaringClass_offset, value);
3289 }
3290
3291 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
3292 element->obj_field_put(methodName_offset, value);
3293 }
3294
3295 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
3296 element->int_field_put(lineNumber_offset, value);
3297 }
3298
3299
3300 // Support for java Assertions - java_lang_AssertionStatusDirectives.
3301
3302 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
3303 o->obj_field_put(classes_offset, val);
3304 }
3305
3306 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
3307 o->obj_field_put(classEnabled_offset, val);
3308 }
3309
3310 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
3311 o->obj_field_put(packages_offset, val);
3312 }
3313
3314 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
3315 o->obj_field_put(packageEnabled_offset, val);
3316 }
3317
3318 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
3319 o->bool_field_put(deflt_offset, val);
3320 }
3321
3322
3323 // Support for intrinsification of java.nio.Buffer.checkIndex
3324 int java_nio_Buffer::limit_offset() {
3325 return _limit_offset;
3326 }
3327
3328
3329 void java_nio_Buffer::compute_offsets() {
3330 Klass* k = SystemDictionary::nio_Buffer_klass();
3331 assert(k != NULL, "must be loaded in 1.4+");
3332 compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature());
3333 }
3334
3335 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) {
3336 if (_owner_offset != 0) return;
3337
3338 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK);
3339 Klass* k = SystemDictionary::abstract_ownable_synchronizer_klass();
3340 compute_offset(_owner_offset, k,
3341 vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature());
3342 }
3343
3344 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
3345 assert(_owner_offset != 0, "Must be initialized");
3346 return obj->obj_field(_owner_offset);
3347 }
3348
3349 // Compute hard-coded offsets
3350 // Invoked before SystemDictionary::initialize, so pre-loaded classes
3351 // are not available to determine the offset_of_static_fields.
3352 void JavaClasses::compute_hard_coded_offsets() {
3353 const int x = heapOopSize;
3354 const int header = instanceOopDesc::base_offset_in_bytes();
3355
3356 // Throwable Class
3357 java_lang_Throwable::backtrace_offset = java_lang_Throwable::hc_backtrace_offset * x + header;
3358 java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header;
3359 java_lang_Throwable::cause_offset = java_lang_Throwable::hc_cause_offset * x + header;
3360 java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header;
3361 java_lang_Throwable::static_unassigned_stacktrace_offset = java_lang_Throwable::hc_static_unassigned_stacktrace_offset * x;
3362
3363 // java_lang_boxing_object
3364 java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header;
3365 java_lang_boxing_object::long_value_offset = align_size_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong);
3366
3367 // java_lang_ref_Reference:
3368 java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header;
3369 java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header;
3370 java_lang_ref_Reference::next_offset = java_lang_ref_Reference::hc_next_offset * x + header;
3371 java_lang_ref_Reference::discovered_offset = java_lang_ref_Reference::hc_discovered_offset * x + header;
3372 java_lang_ref_Reference::static_lock_offset = java_lang_ref_Reference::hc_static_lock_offset * x;
3373 java_lang_ref_Reference::static_pending_offset = java_lang_ref_Reference::hc_static_pending_offset * x;
3374 // Artificial fields for java_lang_ref_Reference
3375 // The first field is for the discovered field added in 1.4
3376 java_lang_ref_Reference::number_of_fake_oop_fields = 1;
3377
3378 // java_lang_ref_SoftReference Class
3379 java_lang_ref_SoftReference::timestamp_offset = align_size_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong);
3380 // Don't multiply static fields because they are always in wordSize units
3381 java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x;
3382
3383 // java_lang_ClassLoader
3384 java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header;
3385
3386 // java_lang_System
3387 java_lang_System::static_in_offset = java_lang_System::hc_static_in_offset * x;
3388 java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x;
3389 java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x;
3390 java_lang_System::static_security_offset = java_lang_System::hc_static_security_offset * x;
3391
3392 // java_lang_StackTraceElement
3393 java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset * x + header;
3394 java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header;
3395 java_lang_StackTraceElement::fileName_offset = java_lang_StackTraceElement::hc_fileName_offset * x + header;
3396 java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header;
3397 java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header;
3398 java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header;
3399 java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header;
3400 java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header;
3401 java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header;
3402
3403 }
3404
3405
3406 // Compute non-hard-coded field offsets of all the classes in this file
3407 void JavaClasses::compute_offsets() {
3408 // java_lang_Class::compute_offsets was called earlier in bootstrap
3409 java_lang_ClassLoader::compute_offsets();
3410 java_lang_Thread::compute_offsets();
3411 java_lang_ThreadGroup::compute_offsets();
3412 java_lang_invoke_MethodHandle::compute_offsets();
3413 java_lang_invoke_DirectMethodHandle::compute_offsets();
3414 java_lang_invoke_MemberName::compute_offsets();
3415 java_lang_invoke_LambdaForm::compute_offsets();
3416 java_lang_invoke_MethodType::compute_offsets();
3417 java_lang_invoke_CallSite::compute_offsets();
3418 java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets();
3419 java_security_AccessControlContext::compute_offsets();
3420 // Initialize reflection classes. The layouts of these classes
3421 // changed with the new reflection implementation in JDK 1.4, and
3422 // since the Universe doesn't know what JDK version it is until this
3423 // point we defer computation of these offsets until now.
3424 java_lang_reflect_AccessibleObject::compute_offsets();
3425 java_lang_reflect_Method::compute_offsets();
3426 java_lang_reflect_Constructor::compute_offsets();
3427 java_lang_reflect_Field::compute_offsets();
3428 java_nio_Buffer::compute_offsets();
3429 sun_reflect_ConstantPool::compute_offsets();
3430 sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets();
3431 java_lang_reflect_Parameter::compute_offsets();
3432
3433 // generated interpreter code wants to know about the offsets we just computed:
3434 AbstractAssembler::update_delayed_values();
3435 }
3436
3437 #ifndef PRODUCT
3438
3439 // These functions exist to assert the validity of hard-coded field offsets to guard
3440 // against changes in the class files
3441
3442 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
3443 EXCEPTION_MARK;
3444 fieldDescriptor fd;
3445 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3446 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3447 instanceKlassHandle h_klass (THREAD, k);
3448 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3449 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3450 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3451 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
3452 return false;
3453 }
3454 if (fd.is_static()) {
3455 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
3456 return false;
3457 }
3458 if (fd.offset() == hardcoded_offset ) {
3459 return true;
3460 } else {
3461 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
3462 klass_name, field_name, hardcoded_offset, fd.offset());
3463 return false;
3464 }
3465 }
3466
3467
3468 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
3469 EXCEPTION_MARK;
3470 fieldDescriptor fd;
3471 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3472 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3473 instanceKlassHandle h_klass (THREAD, k);
3474 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3475 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3476 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3477 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3478 return false;
3479 }
3480 if (!fd.is_static()) {
3481 tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name);
3482 return false;
3483 }
3484 if (fd.offset() == hardcoded_offset + InstanceMirrorKlass::offset_of_static_fields()) {
3485 return true;
3486 } else {
3487 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());
3488 return false;
3489 }
3490 }
3491
3492
3493 bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) {
3494 EXCEPTION_MARK;
3495 fieldDescriptor fd;
3496 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3497 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3498 instanceKlassHandle h_klass (THREAD, k);
3499 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3500 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3501 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3502 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3503 return false;
3504 }
3505 if (!fd.is_static() || !fd.has_initial_value()) {
3506 tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name);
3507 return false;
3508 }
3509 if (!fd.initial_value_tag().is_int()) {
3510 tty->print_cr("Static field %s.%s is not an int", klass_name, field_name);
3511 return false;
3512 }
3513 jint field_value = fd.int_initial_value();
3514 if (field_value == hardcoded_constant) {
3515 return true;
3516 } else {
3517 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);
3518 return false;
3519 }
3520 }
3521
3522
3523 // Check the hard-coded field offsets of all the classes in this file
3524
3525 void JavaClasses::check_offsets() {
3526 bool valid = true;
3527 HandleMark hm;
3528
3529 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3530 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
3531
3532 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3533 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
3534
3535 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3536 valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig)
3537
3538 #define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \
3539 valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig)
3540
3541 // java.lang.String
3542
3543 CHECK_OFFSET("java/lang/String", java_lang_String, value, "[C");
3544 if (java_lang_String::has_offset_field()) {
3545 CHECK_OFFSET("java/lang/String", java_lang_String, offset, "I");
3546 CHECK_OFFSET("java/lang/String", java_lang_String, count, "I");
3547 }
3548 if (java_lang_String::has_hash_field()) {
3549 CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I");
3550 }
3551
3552 // java.lang.Class
3553
3554 // Fake fields
3555 // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked
3556 // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked
3557
3558 // java.lang.Throwable
3559
3560 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;");
3561 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;");
3562 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, cause, "Ljava/lang/Throwable;");
3563 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;");
3564
3565 // Boxed primitive objects (java_lang_boxing_object)
3566
3567 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
3568 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
3569 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
3570 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
3571 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
3572 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
3573 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
3574 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
3575
3576 // java.lang.ClassLoader
3577
3578 CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent, "Ljava/lang/ClassLoader;");
3579
3580 // java.lang.System
3581
3582 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, in, "Ljava/io/InputStream;");
3583 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;");
3584 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;");
3585 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, security, "Ljava/lang/SecurityManager;");
3586
3587 // java.lang.StackTraceElement
3588
3589 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;");
3590 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;");
3591 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, fileName, "Ljava/lang/String;");
3592 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I");
3593
3594 // java.lang.ref.Reference
3595
3596 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
3597 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
3598 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
3599 // Fake field
3600 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
3601 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, lock, "Ljava/lang/ref/Reference$Lock;");
3602 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, pending, "Ljava/lang/ref/Reference;");
3603
3604 // java.lang.ref.SoftReference
3605
3606 CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J");
3607 CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J");
3608
3609 // java.lang.AssertionStatusDirectives
3610 //
3611 // The CheckAssertionStatusDirectives boolean can be removed from here and
3612 // globals.hpp after the AssertionStatusDirectives class has been integrated
3613 // into merlin "for some time." Without it, the vm will fail with early
3614 // merlin builds.
3615
3616 if (CheckAssertionStatusDirectives) {
3617 const char* nm = "java/lang/AssertionStatusDirectives";
3618 const char* sig = "[Ljava/lang/String;";
3619 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig);
3620 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z");
3621 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig);
3622 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z");
3623 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z");
3624 }
3625
3626 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
3627 }
3628
3629 #endif // PRODUCT
3630
3631 int InjectedField::compute_offset() {
3632 Klass* klass_oop = klass();
3633 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
3634 if (!may_be_java && !fs.access_flags().is_internal()) {
3635 // Only look at injected fields
3636 continue;
3637 }
3638 if (fs.name() == name() && fs.signature() == signature()) {
3639 return fs.offset();
3640 }
3641 }
3642 ResourceMark rm;
3643 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)" : "");
3644 #ifndef PRODUCT
3645 klass_oop->print();
3646 tty->print_cr("all fields:");
3647 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
3648 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
3649 }
3650 #endif //PRODUCT
3651 vm_exit_during_initialization("Invalid layout of preloaded class: use -XX:+TraceClassLoading to see the origin of the problem class");
3652 return -1;
3653 }
3654
3655 void javaClasses_init() {
3656 JavaClasses::compute_offsets();
3657 JavaClasses::check_offsets();
3658 FilteredFieldsMap::initialize(); // must be done after computing offsets.
3659 }