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
813 Klass* java_lang_Class::array_klass(oop java_class) {
814 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
815 assert(k == NULL || k->is_klass() && k->oop_is_array(), "should be array klass");
816 return k;
817 }
818
819
820 void java_lang_Class::set_array_klass(oop java_class, Klass* klass) {
821 assert(klass->is_klass() && klass->oop_is_array(), "should be array klass");
822 java_class->metadata_field_put(_array_klass_offset, klass);
823 }
824
825
826 bool java_lang_Class::is_primitive(oop java_class) {
827 // should assert:
828 //assert(java_lang_Class::is_instance(java_class), "must be a Class object");
829 bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL);
830
831 #ifdef ASSERT
832 if (is_primitive) {
833 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
834 assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()),
835 "Should be either the T_VOID primitive or a java primitive");
836 }
837 #endif
838
839 return is_primitive;
840 }
841
842
843 BasicType java_lang_Class::primitive_type(oop java_class) {
844 assert(java_lang_Class::is_primitive(java_class), "just checking");
845 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
846 BasicType type = T_VOID;
847 if (ak != NULL) {
848 // Note: create_basic_type_mirror above initializes ak to a non-null value.
849 type = ArrayKlass::cast(ak)->element_type();
850 } else {
851 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
852 }
853 assert(Universe::java_mirror(type) == java_class, "must be consistent");
854 return type;
855 }
856
857 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
858 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
859 if (is_primitive(java_class)) {
860 if (reference_klass != NULL)
861 (*reference_klass) = NULL;
862 return primitive_type(java_class);
863 } else {
864 if (reference_klass != NULL)
865 (*reference_klass) = as_Klass(java_class);
866 return T_OBJECT;
867 }
868 }
869
870
871 oop java_lang_Class::primitive_mirror(BasicType t) {
872 oop mirror = Universe::java_mirror(t);
873 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class");
874 assert(java_lang_Class::is_primitive(mirror), "must be primitive");
875 return mirror;
876 }
877
878 bool java_lang_Class::offsets_computed = false;
879 int java_lang_Class::classRedefinedCount_offset = -1;
880
881 void java_lang_Class::compute_offsets() {
882 assert(!offsets_computed, "offsets should be initialized only once");
883 offsets_computed = true;
884
885 Klass* k = SystemDictionary::Class_klass();
886 // The classRedefinedCount field is only present starting in 1.5,
887 // so don't go fatal.
888 compute_optional_offset(classRedefinedCount_offset,
889 k, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature());
890
891 // Needs to be optional because the old build runs Queens during bootstrapping
892 // and jdk8-9 doesn't have coordinated pushes yet.
893 compute_optional_offset(_class_loader_offset,
894 k, vmSymbols::classLoader_name(),
895 vmSymbols::classloader_signature());
896
897 compute_offset(_component_mirror_offset,
898 k, vmSymbols::componentType_name(),
899 vmSymbols::class_signature());
900
901 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have
902 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops
903 // GC treats them the same.
904 _init_lock_offset = _component_mirror_offset;
905
906 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
907 }
908
909 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
910 if (classRedefinedCount_offset == -1) {
911 // If we don't have an offset for it then just return -1 as a marker.
912 return -1;
913 }
914
915 return the_class_mirror->int_field(classRedefinedCount_offset);
916 }
917
918 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
919 if (classRedefinedCount_offset == -1) {
920 // If we don't have an offset for it then nothing to set.
921 return;
922 }
923
924 the_class_mirror->int_field_put(classRedefinedCount_offset, value);
925 }
926
927
928 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
929 // platform thread structure, and a eetop offset which was used for thread
930 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
931 // merged, so in the HotSpot VM we just use the eetop field for the thread
932 // instead of the privateInfo_offset.
933 //
934 // Note: The stackSize field is only present starting in 1.4.
935
936 int java_lang_Thread::_name_offset = 0;
937 int java_lang_Thread::_group_offset = 0;
938 int java_lang_Thread::_contextClassLoader_offset = 0;
939 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
940 int java_lang_Thread::_priority_offset = 0;
941 int java_lang_Thread::_eetop_offset = 0;
942 int java_lang_Thread::_daemon_offset = 0;
943 int java_lang_Thread::_stillborn_offset = 0;
944 int java_lang_Thread::_stackSize_offset = 0;
945 int java_lang_Thread::_tid_offset = 0;
946 int java_lang_Thread::_thread_status_offset = 0;
947 int java_lang_Thread::_park_blocker_offset = 0;
948 int java_lang_Thread::_park_event_offset = 0 ;
949
950
951 void java_lang_Thread::compute_offsets() {
952 assert(_group_offset == 0, "offsets should be initialized only once");
953
954 Klass* k = SystemDictionary::Thread_klass();
955 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
956 compute_offset(_group_offset, k, vmSymbols::group_name(), vmSymbols::threadgroup_signature());
957 compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature());
958 compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature());
959 compute_offset(_priority_offset, k, vmSymbols::priority_name(), vmSymbols::int_signature());
960 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
961 compute_offset(_eetop_offset, k, vmSymbols::eetop_name(), vmSymbols::long_signature());
962 compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature());
963 // The stackSize field is only present starting in 1.4, so don't go fatal.
964 compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature());
965 // The tid and thread_status fields are only present starting in 1.5, so don't go fatal.
966 compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature());
967 compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature());
968 // The parkBlocker field is only present starting in 1.6, so don't go fatal.
969 compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature());
970 compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(),
971 vmSymbols::long_signature());
972 }
973
974
975 JavaThread* java_lang_Thread::thread(oop java_thread) {
976 return (JavaThread*)java_thread->address_field(_eetop_offset);
977 }
978
979
980 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
981 java_thread->address_field_put(_eetop_offset, (address)thread);
982 }
983
984
985 oop java_lang_Thread::name(oop java_thread) {
986 return java_thread->obj_field(_name_offset);
987 }
988
989
990 void java_lang_Thread::set_name(oop java_thread, oop name) {
991 java_thread->obj_field_put(_name_offset, name);
992 }
993
994
995 ThreadPriority java_lang_Thread::priority(oop java_thread) {
996 return (ThreadPriority)java_thread->int_field(_priority_offset);
997 }
998
999
1000 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1001 java_thread->int_field_put(_priority_offset, priority);
1002 }
1003
1004
1005 oop java_lang_Thread::threadGroup(oop java_thread) {
1006 return java_thread->obj_field(_group_offset);
1007 }
1008
1009
1010 bool java_lang_Thread::is_stillborn(oop java_thread) {
1011 return java_thread->bool_field(_stillborn_offset) != 0;
1012 }
1013
1014
1015 // We never have reason to turn the stillborn bit off
1016 void java_lang_Thread::set_stillborn(oop java_thread) {
1017 java_thread->bool_field_put(_stillborn_offset, true);
1018 }
1019
1020
1021 bool java_lang_Thread::is_alive(oop java_thread) {
1022 JavaThread* thr = java_lang_Thread::thread(java_thread);
1023 return (thr != NULL);
1024 }
1025
1026
1027 bool java_lang_Thread::is_daemon(oop java_thread) {
1028 return java_thread->bool_field(_daemon_offset) != 0;
1029 }
1030
1031
1032 void java_lang_Thread::set_daemon(oop java_thread) {
1033 java_thread->bool_field_put(_daemon_offset, true);
1034 }
1035
1036 oop java_lang_Thread::context_class_loader(oop java_thread) {
1037 return java_thread->obj_field(_contextClassLoader_offset);
1038 }
1039
1040 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
1041 return java_thread->obj_field(_inheritedAccessControlContext_offset);
1042 }
1043
1044
1045 jlong java_lang_Thread::stackSize(oop java_thread) {
1046 if (_stackSize_offset > 0) {
1047 return java_thread->long_field(_stackSize_offset);
1048 } else {
1049 return 0;
1050 }
1051 }
1052
1053 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1054 void java_lang_Thread::set_thread_status(oop java_thread,
1055 java_lang_Thread::ThreadStatus status) {
1056 // The threadStatus is only present starting in 1.5
1057 if (_thread_status_offset > 0) {
1058 java_thread->int_field_put(_thread_status_offset, status);
1059 }
1060 }
1061
1062 // Read thread status value from threadStatus field in java.lang.Thread java class.
1063 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1064 assert(Thread::current()->is_Watcher_thread() || Thread::current()->is_VM_thread() ||
1065 JavaThread::current()->thread_state() == _thread_in_vm,
1066 "Java Thread is not running in vm");
1067 // The threadStatus is only present starting in 1.5
1068 if (_thread_status_offset > 0) {
1069 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1070 } else {
1071 // All we can easily figure out is if it is alive, but that is
1072 // enough info for a valid unknown status.
1073 // These aren't restricted to valid set ThreadStatus values, so
1074 // use JVMTI values and cast.
1075 JavaThread* thr = java_lang_Thread::thread(java_thread);
1076 if (thr == NULL) {
1077 // the thread hasn't run yet or is in the process of exiting
1078 return NEW;
1079 }
1080 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE;
1081 }
1082 }
1083
1084
1085 jlong java_lang_Thread::thread_id(oop java_thread) {
1086 // The thread ID field is only present starting in 1.5
1087 if (_tid_offset > 0) {
1088 return java_thread->long_field(_tid_offset);
1089 } else {
1090 return 0;
1091 }
1092 }
1093
1094 oop java_lang_Thread::park_blocker(oop java_thread) {
1095 assert(JDK_Version::current().supports_thread_park_blocker() &&
1096 _park_blocker_offset != 0, "Must support parkBlocker field");
1097
1098 if (_park_blocker_offset > 0) {
1099 return java_thread->obj_field(_park_blocker_offset);
1100 }
1101
1102 return NULL;
1103 }
1104
1105 jlong java_lang_Thread::park_event(oop java_thread) {
1106 if (_park_event_offset > 0) {
1107 return java_thread->long_field(_park_event_offset);
1108 }
1109 return 0;
1110 }
1111
1112 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) {
1113 if (_park_event_offset > 0) {
1114 java_thread->long_field_put(_park_event_offset, ptr);
1115 return true;
1116 }
1117 return false;
1118 }
1119
1120
1121 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1122 assert(_thread_status_offset != 0, "Must have thread status");
1123 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1124 switch (status) {
1125 case NEW : return "NEW";
1126 case RUNNABLE : return "RUNNABLE";
1127 case SLEEPING : return "TIMED_WAITING (sleeping)";
1128 case IN_OBJECT_WAIT : return "WAITING (on object monitor)";
1129 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
1130 case PARKED : return "WAITING (parking)";
1131 case PARKED_TIMED : return "TIMED_WAITING (parking)";
1132 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1133 case TERMINATED : return "TERMINATED";
1134 default : return "UNKNOWN";
1135 };
1136 }
1137 int java_lang_ThreadGroup::_parent_offset = 0;
1138 int java_lang_ThreadGroup::_name_offset = 0;
1139 int java_lang_ThreadGroup::_threads_offset = 0;
1140 int java_lang_ThreadGroup::_groups_offset = 0;
1141 int java_lang_ThreadGroup::_maxPriority_offset = 0;
1142 int java_lang_ThreadGroup::_destroyed_offset = 0;
1143 int java_lang_ThreadGroup::_daemon_offset = 0;
1144 int java_lang_ThreadGroup::_vmAllowSuspension_offset = 0;
1145 int java_lang_ThreadGroup::_nthreads_offset = 0;
1146 int java_lang_ThreadGroup::_ngroups_offset = 0;
1147
1148 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
1149 assert(java_thread_group->is_oop(), "thread group must be oop");
1150 return java_thread_group->obj_field(_parent_offset);
1151 }
1152
1153 // ("name as oop" accessor is not necessary)
1154
1155 typeArrayOop java_lang_ThreadGroup::name(oop java_thread_group) {
1156 oop name = java_thread_group->obj_field(_name_offset);
1157 // ThreadGroup.name can be null
1158 return name == NULL ? (typeArrayOop)NULL : java_lang_String::value(name);
1159 }
1160
1161 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
1162 assert(java_thread_group->is_oop(), "thread group must be oop");
1163 return java_thread_group->int_field(_nthreads_offset);
1164 }
1165
1166 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
1167 oop threads = java_thread_group->obj_field(_threads_offset);
1168 assert(threads != NULL, "threadgroups should have threads");
1169 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
1170 return objArrayOop(threads);
1171 }
1172
1173 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
1174 assert(java_thread_group->is_oop(), "thread group must be oop");
1175 return java_thread_group->int_field(_ngroups_offset);
1176 }
1177
1178 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
1179 oop groups = java_thread_group->obj_field(_groups_offset);
1180 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
1181 return objArrayOop(groups);
1182 }
1183
1184 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1185 assert(java_thread_group->is_oop(), "thread group must be oop");
1186 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1187 }
1188
1189 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
1190 assert(java_thread_group->is_oop(), "thread group must be oop");
1191 return java_thread_group->bool_field(_destroyed_offset) != 0;
1192 }
1193
1194 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1195 assert(java_thread_group->is_oop(), "thread group must be oop");
1196 return java_thread_group->bool_field(_daemon_offset) != 0;
1197 }
1198
1199 bool java_lang_ThreadGroup::is_vmAllowSuspension(oop java_thread_group) {
1200 assert(java_thread_group->is_oop(), "thread group must be oop");
1201 return java_thread_group->bool_field(_vmAllowSuspension_offset) != 0;
1202 }
1203
1204 void java_lang_ThreadGroup::compute_offsets() {
1205 assert(_parent_offset == 0, "offsets should be initialized only once");
1206
1207 Klass* k = SystemDictionary::ThreadGroup_klass();
1208
1209 compute_offset(_parent_offset, k, vmSymbols::parent_name(), vmSymbols::threadgroup_signature());
1210 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1211 compute_offset(_threads_offset, k, vmSymbols::threads_name(), vmSymbols::thread_array_signature());
1212 compute_offset(_groups_offset, k, vmSymbols::groups_name(), vmSymbols::threadgroup_array_signature());
1213 compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature());
1214 compute_offset(_destroyed_offset, k, vmSymbols::destroyed_name(), vmSymbols::bool_signature());
1215 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
1216 compute_offset(_vmAllowSuspension_offset, k, vmSymbols::vmAllowSuspension_name(), vmSymbols::bool_signature());
1217 compute_offset(_nthreads_offset, k, vmSymbols::nthreads_name(), vmSymbols::int_signature());
1218 compute_offset(_ngroups_offset, k, vmSymbols::ngroups_name(), vmSymbols::int_signature());
1219 }
1220
1221 oop java_lang_Throwable::unassigned_stacktrace() {
1222 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Throwable_klass());
1223 address addr = ik->static_field_addr(static_unassigned_stacktrace_offset);
1224 if (UseCompressedOops) {
1225 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
1226 } else {
1227 return oopDesc::load_decode_heap_oop((oop*)addr);
1228 }
1229 }
1230
1231 oop java_lang_Throwable::backtrace(oop throwable) {
1232 return throwable->obj_field_acquire(backtrace_offset);
1233 }
1234
1235
1236 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
1237 throwable->release_obj_field_put(backtrace_offset, value);
1238 }
1239
1240
1241 oop java_lang_Throwable::message(oop throwable) {
1242 return throwable->obj_field(detailMessage_offset);
1243 }
1244
1245
1246 oop java_lang_Throwable::message(Handle throwable) {
1247 return throwable->obj_field(detailMessage_offset);
1248 }
1249
1250
1251 // Return Symbol for detailed_message or NULL
1252 Symbol* java_lang_Throwable::detail_message(oop throwable) {
1253 PRESERVE_EXCEPTION_MARK; // Keep original exception
1254 oop detailed_message = java_lang_Throwable::message(throwable);
1255 if (detailed_message != NULL) {
1256 return java_lang_String::as_symbol(detailed_message, THREAD);
1257 }
1258 return NULL;
1259 }
1260
1261 void java_lang_Throwable::set_message(oop throwable, oop value) {
1262 throwable->obj_field_put(detailMessage_offset, value);
1263 }
1264
1265
1266 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
1267 throwable->obj_field_put(stackTrace_offset, st_element_array);
1268 }
1269
1270 void java_lang_Throwable::clear_stacktrace(oop throwable) {
1271 set_stacktrace(throwable, NULL);
1272 }
1273
1274
1275 void java_lang_Throwable::print(oop throwable, outputStream* st) {
1276 ResourceMark rm;
1277 Klass* k = throwable->klass();
1278 assert(k != NULL, "just checking");
1279 st->print("%s", InstanceKlass::cast(k)->external_name());
1280 oop msg = message(throwable);
1281 if (msg != NULL) {
1282 st->print(": %s", java_lang_String::as_utf8_string(msg));
1283 }
1284 }
1285
1286
1287 void java_lang_Throwable::print(Handle throwable, outputStream* st) {
1288 ResourceMark rm;
1289 Klass* k = throwable->klass();
1290 assert(k != NULL, "just checking");
1291 st->print("%s", InstanceKlass::cast(k)->external_name());
1292 oop msg = message(throwable);
1293 if (msg != NULL) {
1294 st->print(": %s", java_lang_String::as_utf8_string(msg));
1295 }
1296 }
1297
1298 // After this many redefines, the stack trace is unreliable.
1299 const int MAX_VERSION = USHRT_MAX;
1300
1301 // Helper backtrace functions to store bci|version together.
1302 static inline int merge_bci_and_version(int bci, int version) {
1303 // only store u2 for version, checking for overflow.
1304 if (version > USHRT_MAX || version < 0) version = MAX_VERSION;
1305 assert((jushort)bci == bci, "bci should be short");
1306 return build_int_from_shorts(version, bci);
1307 }
1308
1309 static inline int bci_at(unsigned int merged) {
1310 return extract_high_short_from_int(merged);
1311 }
1312 static inline int version_at(unsigned int merged) {
1313 return extract_low_short_from_int(merged);
1314 }
1315
1316 static inline bool version_matches(Method* method, int version) {
1317 assert(version < MAX_VERSION, "version is too big");
1318 return method != NULL && (method->constants()->version() == version);
1319 }
1320
1321 static inline int get_line_number(Method* method, int bci) {
1322 int line_number = 0;
1323 if (method->is_native()) {
1324 // Negative value different from -1 below, enabling Java code in
1325 // class java.lang.StackTraceElement to distinguish "native" from
1326 // "no LineNumberTable". JDK tests for -2.
1327 line_number = -2;
1328 } else {
1329 // Returns -1 if no LineNumberTable, and otherwise actual line number
1330 line_number = method->line_number_from_bci(bci);
1331 if (line_number == -1 && ShowHiddenFrames) {
1332 line_number = bci + 1000000;
1333 }
1334 }
1335 return line_number;
1336 }
1337
1338 // This class provides a simple wrapper over the internal structure of
1339 // exception backtrace to insulate users of the backtrace from needing
1340 // to know what it looks like.
1341 class BacktraceBuilder: public StackObj {
1342 private:
1343 Handle _backtrace;
1344 objArrayOop _head;
1345 typeArrayOop _methods;
1346 typeArrayOop _bcis;
1347 objArrayOop _mirrors;
1348 typeArrayOop _cprefs; // needed to insulate method name against redefinition
1349 int _index;
1350 No_Safepoint_Verifier _nsv;
1351
1352 public:
1353
1354 enum {
1355 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
1356 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
1357 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
1358 trace_cprefs_offset = java_lang_Throwable::trace_cprefs_offset,
1359 trace_next_offset = java_lang_Throwable::trace_next_offset,
1360 trace_size = java_lang_Throwable::trace_size,
1361 trace_chunk_size = java_lang_Throwable::trace_chunk_size
1362 };
1363
1364 // get info out of chunks
1365 static typeArrayOop get_methods(objArrayHandle chunk) {
1366 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
1367 assert(methods != NULL, "method array should be initialized in backtrace");
1368 return methods;
1369 }
1370 static typeArrayOop get_bcis(objArrayHandle chunk) {
1371 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1372 assert(bcis != NULL, "bci array should be initialized in backtrace");
1373 return bcis;
1374 }
1375 static objArrayOop get_mirrors(objArrayHandle chunk) {
1376 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
1377 assert(mirrors != NULL, "mirror array should be initialized in backtrace");
1378 return mirrors;
1379 }
1380 static typeArrayOop get_cprefs(objArrayHandle chunk) {
1381 typeArrayOop cprefs = typeArrayOop(chunk->obj_at(trace_cprefs_offset));
1382 assert(cprefs != NULL, "cprefs array should be initialized in backtrace");
1383 return cprefs;
1384 }
1385
1386 // constructor for new backtrace
1387 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _mirrors(NULL), _cprefs(NULL) {
1388 expand(CHECK);
1389 _backtrace = _head;
1390 _index = 0;
1391 }
1392
1393 BacktraceBuilder(objArrayHandle backtrace) {
1394 _methods = get_methods(backtrace);
1395 _bcis = get_bcis(backtrace);
1396 _mirrors = get_mirrors(backtrace);
1397 _cprefs = get_cprefs(backtrace);
1398 assert(_methods->length() == _bcis->length() &&
1399 _methods->length() == _mirrors->length(),
1400 "method and source information arrays should match");
1401
1402 // head is the preallocated backtrace
1403 _backtrace = _head = backtrace();
1404 _index = 0;
1405 }
1406
1407 void expand(TRAPS) {
1408 objArrayHandle old_head(THREAD, _head);
1409 Pause_No_Safepoint_Verifier pnsv(&_nsv);
1410
1411 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
1412 objArrayHandle new_head(THREAD, head);
1413
1414 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1415 typeArrayHandle new_methods(THREAD, methods);
1416
1417 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
1418 typeArrayHandle new_bcis(THREAD, bcis);
1419
1420 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
1421 objArrayHandle new_mirrors(THREAD, mirrors);
1422
1423 typeArrayOop cprefs = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1424 typeArrayHandle new_cprefs(THREAD, cprefs);
1425
1426 if (!old_head.is_null()) {
1427 old_head->obj_at_put(trace_next_offset, new_head());
1428 }
1429 new_head->obj_at_put(trace_methods_offset, new_methods());
1430 new_head->obj_at_put(trace_bcis_offset, new_bcis());
1431 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
1432 new_head->obj_at_put(trace_cprefs_offset, new_cprefs());
1433
1434 _head = new_head();
1435 _methods = new_methods();
1436 _bcis = new_bcis();
1437 _mirrors = new_mirrors();
1438 _cprefs = new_cprefs();
1439 _index = 0;
1440 }
1441
1442 oop backtrace() {
1443 return _backtrace();
1444 }
1445
1446 inline void push(Method* method, int bci, TRAPS) {
1447 // Smear the -1 bci to 0 since the array only holds unsigned
1448 // shorts. The later line number lookup would just smear the -1
1449 // to a 0 even if it could be recorded.
1450 if (bci == SynchronizationEntryBCI) bci = 0;
1451
1452 if (_index >= trace_chunk_size) {
1453 methodHandle mhandle(THREAD, method);
1454 expand(CHECK);
1455 method = mhandle();
1456 }
1457
1458 _methods->short_at_put(_index, method->orig_method_idnum());
1459 _bcis->int_at_put(_index, merge_bci_and_version(bci, method->constants()->version()));
1460 _cprefs->short_at_put(_index, method->name_index());
1461
1462 // We need to save the mirrors in the backtrace to keep the class
1463 // from being unloaded while we still have this stack trace.
1464 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror");
1465 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
1466 _index++;
1467 }
1468
1469 };
1470
1471 // Print stack trace element to resource allocated buffer
1472 char* java_lang_Throwable::print_stack_element_to_buffer(Handle mirror,
1473 int method_id, int version, int bci, int cpref) {
1474
1475 // Get strings and string lengths
1476 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
1477 const char* klass_name = holder->external_name();
1478 int buf_len = (int)strlen(klass_name);
1479
1480 Method* method = holder->method_with_orig_idnum(method_id, version);
1481
1482 // The method can be NULL if the requested class version is gone
1483 Symbol* sym = (method != NULL) ? method->name() : holder->constants()->symbol_at(cpref);
1484 char* method_name = sym->as_C_string();
1485 buf_len += (int)strlen(method_name);
1486
1487 // Use specific ik version as a holder since the mirror might
1488 // refer to version that is now obsolete and no longer accessible
1489 // via the previous versions list.
1490 holder = holder->get_klass_version(version);
1491 char* source_file_name = NULL;
1492 if (holder != NULL) {
1493 Symbol* source = holder->source_file_name();
1494 if (source != NULL) {
1495 source_file_name = source->as_C_string();
1496 buf_len += (int)strlen(source_file_name);
1497 }
1498 }
1499
1500 // Allocate temporary buffer with extra space for formatting and line number
1501 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
1502
1503 // Print stack trace line in buffer
1504 sprintf(buf, "\tat %s.%s", klass_name, method_name);
1505
1506 if (!version_matches(method, version)) {
1507 strcat(buf, "(Redefined)");
1508 } else {
1509 int line_number = get_line_number(method, bci);
1510 if (line_number == -2) {
1511 strcat(buf, "(Native Method)");
1512 } else {
1513 if (source_file_name != NULL && (line_number != -1)) {
1514 // Sourcename and linenumber
1515 sprintf(buf + (int)strlen(buf), "(%s:%d)", source_file_name, line_number);
1516 } else if (source_file_name != NULL) {
1517 // Just sourcename
1518 sprintf(buf + (int)strlen(buf), "(%s)", source_file_name);
1519 } else {
1520 // Neither sourcename nor linenumber
1521 sprintf(buf + (int)strlen(buf), "(Unknown Source)");
1522 }
1523 nmethod* nm = method->code();
1524 if (WizardMode && nm != NULL) {
1525 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
1526 }
1527 }
1528 }
1529
1530 return buf;
1531 }
1532
1533 void java_lang_Throwable::print_stack_element(outputStream *st, Handle mirror,
1534 int method_id, int version, int bci, int cpref) {
1535 ResourceMark rm;
1536 char* buf = print_stack_element_to_buffer(mirror, method_id, version, bci, cpref);
1537 st->print_cr("%s", buf);
1538 }
1539
1540 void java_lang_Throwable::print_stack_element(outputStream *st, methodHandle method, int bci) {
1541 Handle mirror = method->method_holder()->java_mirror();
1542 int method_id = method->orig_method_idnum();
1543 int version = method->constants()->version();
1544 int cpref = method->name_index();
1545 print_stack_element(st, mirror, method_id, version, bci, cpref);
1546 }
1547
1548 const char* java_lang_Throwable::no_stack_trace_message() {
1549 return "\t<<no stack trace available>>";
1550 }
1551
1552
1553 // Currently used only for exceptions occurring during startup
1554 void java_lang_Throwable::print_stack_trace(oop throwable, outputStream* st) {
1555 Thread *THREAD = Thread::current();
1556 Handle h_throwable(THREAD, throwable);
1557 while (h_throwable.not_null()) {
1558 objArrayHandle result (THREAD, objArrayOop(backtrace(h_throwable())));
1559 if (result.is_null()) {
1560 st->print_cr("%s", no_stack_trace_message());
1561 return;
1562 }
1563
1564 while (result.not_null()) {
1565
1566 // Get method id, bci, version and mirror from chunk
1567 typeArrayHandle methods (THREAD, BacktraceBuilder::get_methods(result));
1568 typeArrayHandle bcis (THREAD, BacktraceBuilder::get_bcis(result));
1569 objArrayHandle mirrors (THREAD, BacktraceBuilder::get_mirrors(result));
1570 typeArrayHandle cprefs (THREAD, BacktraceBuilder::get_cprefs(result));
1571
1572 int length = methods()->length();
1573 for (int index = 0; index < length; index++) {
1574 Handle mirror(THREAD, mirrors->obj_at(index));
1575 // NULL mirror means end of stack trace
1576 if (mirror.is_null()) goto handle_cause;
1577 int method = methods->short_at(index);
1578 int version = version_at(bcis->int_at(index));
1579 int bci = bci_at(bcis->int_at(index));
1580 int cpref = cprefs->short_at(index);
1581 print_stack_element(st, mirror, method, version, bci, cpref);
1582 }
1583 result = objArrayHandle(THREAD, objArrayOop(result->obj_at(trace_next_offset)));
1584 }
1585 handle_cause:
1586 {
1587 EXCEPTION_MARK;
1588 JavaValue cause(T_OBJECT);
1589 JavaCalls::call_virtual(&cause,
1590 h_throwable,
1591 KlassHandle(THREAD, h_throwable->klass()),
1592 vmSymbols::getCause_name(),
1593 vmSymbols::void_throwable_signature(),
1594 THREAD);
1595 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
1596 if (HAS_PENDING_EXCEPTION) {
1597 CLEAR_PENDING_EXCEPTION;
1598 h_throwable = Handle();
1599 } else {
1600 h_throwable = Handle(THREAD, (oop) cause.get_jobject());
1601 if (h_throwable.not_null()) {
1602 st->print("Caused by: ");
1603 print(h_throwable, st);
1604 st->cr();
1605 }
1606 }
1607 }
1608 }
1609 }
1610
1611 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method, TRAPS) {
1612 if (!StackTraceInThrowable) return;
1613 ResourceMark rm(THREAD);
1614
1615 // Start out by clearing the backtrace for this object, in case the VM
1616 // runs out of memory while allocating the stack trace
1617 set_backtrace(throwable(), NULL);
1618 // Clear lazily constructed Java level stacktrace if refilling occurs
1619 // This is unnecessary in 1.7+ but harmless
1620 clear_stacktrace(throwable());
1621
1622 int max_depth = MaxJavaStackTraceDepth;
1623 JavaThread* thread = (JavaThread*)THREAD;
1624 BacktraceBuilder bt(CHECK);
1625
1626 // If there is no Java frame just return the method that was being called
1627 // with bci 0
1628 if (!thread->has_last_Java_frame()) {
1629 if (max_depth >= 1 && method() != NULL) {
1630 bt.push(method(), 0, CHECK);
1631 set_backtrace(throwable(), bt.backtrace());
1632 }
1633 return;
1634 }
1635
1636 // Instead of using vframe directly, this version of fill_in_stack_trace
1637 // basically handles everything by hand. This significantly improved the
1638 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
1639 // See bug 6333838 for more details.
1640 // The "ASSERT" here is to verify this method generates the exactly same stack
1641 // trace as utilizing vframe.
1642 #ifdef ASSERT
1643 vframeStream st(thread);
1644 methodHandle st_method(THREAD, st.method());
1645 #endif
1646 int total_count = 0;
1647 RegisterMap map(thread, false);
1648 int decode_offset = 0;
1649 nmethod* nm = NULL;
1650 bool skip_fillInStackTrace_check = false;
1651 bool skip_throwableInit_check = false;
1652 bool skip_hidden = !ShowHiddenFrames;
1653
1654 for (frame fr = thread->last_frame(); max_depth != total_count;) {
1655 Method* method = NULL;
1656 int bci = 0;
1657
1658 // Compiled java method case.
1659 if (decode_offset != 0) {
1660 DebugInfoReadStream stream(nm, decode_offset);
1661 decode_offset = stream.read_int();
1662 method = (Method*)nm->metadata_at(stream.read_int());
1663 bci = stream.read_bci();
1664 } else {
1665 if (fr.is_first_frame()) break;
1666 address pc = fr.pc();
1667 if (fr.is_interpreted_frame()) {
1668 address bcp = fr.interpreter_frame_bcp();
1669 method = fr.interpreter_frame_method();
1670 bci = method->bci_from(bcp);
1671 fr = fr.sender(&map);
1672 } else {
1673 CodeBlob* cb = fr.cb();
1674 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
1675 // but non nmethod
1676 fr = fr.sender(&map);
1677 if (cb == NULL || !cb->is_nmethod()) {
1678 continue;
1679 }
1680 nm = (nmethod*)cb;
1681 if (nm->method()->is_native()) {
1682 method = nm->method();
1683 bci = 0;
1684 } else {
1685 PcDesc* pd = nm->pc_desc_at(pc);
1686 decode_offset = pd->scope_decode_offset();
1687 // if decode_offset is not equal to 0, it will execute the
1688 // "compiled java method case" at the beginning of the loop.
1689 continue;
1690 }
1691 }
1692 }
1693 #ifdef ASSERT
1694 assert(st_method() == method && st.bci() == bci,
1695 "Wrong stack trace");
1696 st.next();
1697 // vframeStream::method isn't GC-safe so store off a copy
1698 // of the Method* in case we GC.
1699 if (!st.at_end()) {
1700 st_method = st.method();
1701 }
1702 #endif
1703
1704 // the format of the stacktrace will be:
1705 // - 1 or more fillInStackTrace frames for the exception class (skipped)
1706 // - 0 or more <init> methods for the exception class (skipped)
1707 // - rest of the stack
1708
1709 if (!skip_fillInStackTrace_check) {
1710 if ((method->name() == vmSymbols::fillInStackTrace_name() ||
1711 method->name() == vmSymbols::fillInStackTrace0_name()) &&
1712 throwable->is_a(method->method_holder())) {
1713 continue;
1714 }
1715 else {
1716 skip_fillInStackTrace_check = true; // gone past them all
1717 }
1718 }
1719 if (!skip_throwableInit_check) {
1720 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
1721
1722 // skip <init> methods of the exception class and superclasses
1723 // This is simlar to classic VM.
1724 if (method->name() == vmSymbols::object_initializer_name() &&
1725 throwable->is_a(method->method_holder())) {
1726 continue;
1727 } else {
1728 // there are none or we've seen them all - either way stop checking
1729 skip_throwableInit_check = true;
1730 }
1731 }
1732 if (method->is_hidden()) {
1733 if (skip_hidden) continue;
1734 }
1735 bt.push(method, bci, CHECK);
1736 total_count++;
1737 }
1738
1739 // Put completed stack trace into throwable object
1740 set_backtrace(throwable(), bt.backtrace());
1741 }
1742
1743 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method) {
1744 // No-op if stack trace is disabled
1745 if (!StackTraceInThrowable) {
1746 return;
1747 }
1748
1749 // Disable stack traces for some preallocated out of memory errors
1750 if (!Universe::should_fill_in_stack_trace(throwable)) {
1751 return;
1752 }
1753
1754 PRESERVE_EXCEPTION_MARK;
1755
1756 JavaThread* thread = JavaThread::active();
1757 fill_in_stack_trace(throwable, method, thread);
1758 // ignore exceptions thrown during stack trace filling
1759 CLEAR_PENDING_EXCEPTION;
1760 }
1761
1762 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
1763 // Allocate stack trace - backtrace is created but not filled in
1764
1765 // No-op if stack trace is disabled
1766 if (!StackTraceInThrowable) return;
1767 BacktraceBuilder bt(CHECK); // creates a backtrace
1768 set_backtrace(throwable(), bt.backtrace());
1769 }
1770
1771
1772 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
1773 // Fill in stack trace into preallocated backtrace (no GC)
1774
1775 // No-op if stack trace is disabled
1776 if (!StackTraceInThrowable) return;
1777
1778 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
1779
1780 JavaThread* THREAD = JavaThread::current();
1781
1782 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
1783 assert(backtrace.not_null(), "backtrace should have been preallocated");
1784
1785 ResourceMark rm(THREAD);
1786 vframeStream st(THREAD);
1787
1788 BacktraceBuilder bt(backtrace);
1789
1790 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
1791 // methods as preallocated errors aren't created by "java" code.
1792
1793 // fill in as much stack trace as possible
1794 typeArrayOop methods = BacktraceBuilder::get_methods(backtrace);
1795 int max_chunks = MIN2(methods->length(), (int)MaxJavaStackTraceDepth);
1796 int chunk_count = 0;
1797
1798 for (;!st.at_end(); st.next()) {
1799 bt.push(st.method(), st.bci(), CHECK);
1800 chunk_count++;
1801
1802 // Bail-out for deep stacks
1803 if (chunk_count >= max_chunks) break;
1804 }
1805
1806 // We support the Throwable immutability protocol defined for Java 7.
1807 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
1808 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized");
1809 }
1810
1811
1812 int java_lang_Throwable::get_stack_trace_depth(oop throwable, TRAPS) {
1813 if (throwable == NULL) {
1814 THROW_0(vmSymbols::java_lang_NullPointerException());
1815 }
1816 objArrayOop chunk = objArrayOop(backtrace(throwable));
1817 int depth = 0;
1818 if (chunk != NULL) {
1819 // Iterate over chunks and count full ones
1820 while (true) {
1821 objArrayOop next = objArrayOop(chunk->obj_at(trace_next_offset));
1822 if (next == NULL) break;
1823 depth += trace_chunk_size;
1824 chunk = next;
1825 }
1826 assert(chunk != NULL && chunk->obj_at(trace_next_offset) == NULL, "sanity check");
1827 // Count element in remaining partial chunk. NULL value for mirror
1828 // marks the end of the stack trace elements that are saved.
1829 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk);
1830 assert(mirrors != NULL, "sanity check");
1831 for (int i = 0; i < mirrors->length(); i++) {
1832 if (mirrors->obj_at(i) == NULL) break;
1833 depth++;
1834 }
1835 }
1836 return depth;
1837 }
1838
1839
1840 oop java_lang_Throwable::get_stack_trace_element(oop throwable, int index, TRAPS) {
1841 if (throwable == NULL) {
1842 THROW_0(vmSymbols::java_lang_NullPointerException());
1843 }
1844 if (index < 0) {
1845 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1846 }
1847 // Compute how many chunks to skip and index into actual chunk
1848 objArrayOop chunk = objArrayOop(backtrace(throwable));
1849 int skip_chunks = index / trace_chunk_size;
1850 int chunk_index = index % trace_chunk_size;
1851 while (chunk != NULL && skip_chunks > 0) {
1852 chunk = objArrayOop(chunk->obj_at(trace_next_offset));
1853 skip_chunks--;
1854 }
1855 if (chunk == NULL) {
1856 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1857 }
1858 // Get method id, bci, version, mirror and cpref from chunk
1859 typeArrayOop methods = BacktraceBuilder::get_methods(chunk);
1860 typeArrayOop bcis = BacktraceBuilder::get_bcis(chunk);
1861 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk);
1862 typeArrayOop cprefs = BacktraceBuilder::get_cprefs(chunk);
1863
1864 assert(methods != NULL && bcis != NULL && mirrors != NULL, "sanity check");
1865
1866 int method = methods->short_at(chunk_index);
1867 int version = version_at(bcis->int_at(chunk_index));
1868 int bci = bci_at(bcis->int_at(chunk_index));
1869 int cpref = cprefs->short_at(chunk_index);
1870 Handle mirror(THREAD, mirrors->obj_at(chunk_index));
1871
1872 // Chunk can be partial full
1873 if (mirror.is_null()) {
1874 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1875 }
1876 oop element = java_lang_StackTraceElement::create(mirror, method, version, bci, cpref, CHECK_0);
1877 return element;
1878 }
1879
1880 oop java_lang_StackTraceElement::create(Handle mirror, int method_id,
1881 int version, int bci, int cpref, TRAPS) {
1882 // Allocate java.lang.StackTraceElement instance
1883 Klass* k = SystemDictionary::StackTraceElement_klass();
1884 assert(k != NULL, "must be loaded in 1.4+");
1885 instanceKlassHandle ik (THREAD, k);
1886 if (ik->should_be_initialized()) {
1887 ik->initialize(CHECK_0);
1888 }
1889
1890 Handle element = ik->allocate_instance_handle(CHECK_0);
1891 // Fill in class name
1892 ResourceMark rm(THREAD);
1893 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
1894 const char* str = holder->external_name();
1895 oop classname = StringTable::intern((char*) str, CHECK_0);
1896 java_lang_StackTraceElement::set_declaringClass(element(), classname);
1897
1898 Method* method = holder->method_with_orig_idnum(method_id, version);
1899
1900 // The method can be NULL if the requested class version is gone
1901 Symbol* sym = (method != NULL) ? method->name() : holder->constants()->symbol_at(cpref);
1902
1903 // Fill in method name
1904 oop methodname = StringTable::intern(sym, CHECK_0);
1905 java_lang_StackTraceElement::set_methodName(element(), methodname);
1906
1907 if (!version_matches(method, version)) {
1908 // The method was redefined, accurate line number information isn't available
1909 java_lang_StackTraceElement::set_fileName(element(), NULL);
1910 java_lang_StackTraceElement::set_lineNumber(element(), -1);
1911 } else {
1912 // Fill in source file name and line number.
1913 // Use specific ik version as a holder since the mirror might
1914 // refer to version that is now obsolete and no longer accessible
1915 // via the previous versions list.
1916 holder = holder->get_klass_version(version);
1917 assert(holder != NULL, "sanity check");
1918 Symbol* source = holder->source_file_name();
1919 if (ShowHiddenFrames && source == NULL)
1920 source = vmSymbols::unknown_class_name();
1921 oop filename = StringTable::intern(source, CHECK_0);
1922 java_lang_StackTraceElement::set_fileName(element(), filename);
1923
1924 int line_number = get_line_number(method, bci);
1925 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
1926 }
1927 return element();
1928 }
1929
1930 oop java_lang_StackTraceElement::create(methodHandle method, int bci, TRAPS) {
1931 Handle mirror (THREAD, method->method_holder()->java_mirror());
1932 int method_id = method->orig_method_idnum();
1933 int cpref = method->name_index();
1934 return create(mirror, method_id, method->constants()->version(), bci, cpref, THREAD);
1935 }
1936
1937 void java_lang_reflect_AccessibleObject::compute_offsets() {
1938 Klass* k = SystemDictionary::reflect_AccessibleObject_klass();
1939 compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature());
1940 }
1941
1942 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
1943 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1944 return (jboolean) reflect->bool_field(override_offset);
1945 }
1946
1947 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
1948 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1949 reflect->bool_field_put(override_offset, (int) value);
1950 }
1951
1952 void java_lang_reflect_Method::compute_offsets() {
1953 Klass* k = SystemDictionary::reflect_Method_klass();
1954 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
1955 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1956 compute_offset(returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature());
1957 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
1958 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
1959 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
1960 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
1961 // The generic signature and annotations fields are only present in 1.5
1962 signature_offset = -1;
1963 annotations_offset = -1;
1964 parameter_annotations_offset = -1;
1965 annotation_default_offset = -1;
1966 type_annotations_offset = -1;
1967 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
1968 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
1969 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
1970 compute_optional_offset(annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature());
1971 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
1972 }
1973
1974 Handle java_lang_reflect_Method::create(TRAPS) {
1975 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1976 Klass* klass = SystemDictionary::reflect_Method_klass();
1977 // This class is eagerly initialized during VM initialization, since we keep a refence
1978 // to one of the methods
1979 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
1980 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
1981 }
1982
1983 oop java_lang_reflect_Method::clazz(oop reflect) {
1984 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1985 return reflect->obj_field(clazz_offset);
1986 }
1987
1988 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
1989 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1990 reflect->obj_field_put(clazz_offset, value);
1991 }
1992
1993 int java_lang_reflect_Method::slot(oop reflect) {
1994 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1995 return reflect->int_field(slot_offset);
1996 }
1997
1998 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
1999 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2000 reflect->int_field_put(slot_offset, value);
2001 }
2002
2003 oop java_lang_reflect_Method::name(oop method) {
2004 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2005 return method->obj_field(name_offset);
2006 }
2007
2008 void java_lang_reflect_Method::set_name(oop method, oop value) {
2009 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2010 method->obj_field_put(name_offset, value);
2011 }
2012
2013 oop java_lang_reflect_Method::return_type(oop method) {
2014 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2015 return method->obj_field(returnType_offset);
2016 }
2017
2018 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
2019 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2020 method->obj_field_put(returnType_offset, value);
2021 }
2022
2023 oop java_lang_reflect_Method::parameter_types(oop method) {
2024 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2025 return method->obj_field(parameterTypes_offset);
2026 }
2027
2028 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
2029 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2030 method->obj_field_put(parameterTypes_offset, value);
2031 }
2032
2033 oop java_lang_reflect_Method::exception_types(oop method) {
2034 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2035 return method->obj_field(exceptionTypes_offset);
2036 }
2037
2038 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
2039 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2040 method->obj_field_put(exceptionTypes_offset, value);
2041 }
2042
2043 int java_lang_reflect_Method::modifiers(oop method) {
2044 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2045 return method->int_field(modifiers_offset);
2046 }
2047
2048 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
2049 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2050 method->int_field_put(modifiers_offset, value);
2051 }
2052
2053 bool java_lang_reflect_Method::has_signature_field() {
2054 return (signature_offset >= 0);
2055 }
2056
2057 oop java_lang_reflect_Method::signature(oop method) {
2058 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2059 assert(has_signature_field(), "signature field must be present");
2060 return method->obj_field(signature_offset);
2061 }
2062
2063 void java_lang_reflect_Method::set_signature(oop method, oop value) {
2064 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2065 assert(has_signature_field(), "signature field must be present");
2066 method->obj_field_put(signature_offset, value);
2067 }
2068
2069 bool java_lang_reflect_Method::has_annotations_field() {
2070 return (annotations_offset >= 0);
2071 }
2072
2073 oop java_lang_reflect_Method::annotations(oop method) {
2074 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2075 assert(has_annotations_field(), "annotations field must be present");
2076 return method->obj_field(annotations_offset);
2077 }
2078
2079 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
2080 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2081 assert(has_annotations_field(), "annotations field must be present");
2082 method->obj_field_put(annotations_offset, value);
2083 }
2084
2085 bool java_lang_reflect_Method::has_parameter_annotations_field() {
2086 return (parameter_annotations_offset >= 0);
2087 }
2088
2089 oop java_lang_reflect_Method::parameter_annotations(oop method) {
2090 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2091 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2092 return method->obj_field(parameter_annotations_offset);
2093 }
2094
2095 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
2096 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2097 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2098 method->obj_field_put(parameter_annotations_offset, value);
2099 }
2100
2101 bool java_lang_reflect_Method::has_annotation_default_field() {
2102 return (annotation_default_offset >= 0);
2103 }
2104
2105 oop java_lang_reflect_Method::annotation_default(oop method) {
2106 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2107 assert(has_annotation_default_field(), "annotation default field must be present");
2108 return method->obj_field(annotation_default_offset);
2109 }
2110
2111 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
2112 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2113 assert(has_annotation_default_field(), "annotation default field must be present");
2114 method->obj_field_put(annotation_default_offset, value);
2115 }
2116
2117 bool java_lang_reflect_Method::has_type_annotations_field() {
2118 return (type_annotations_offset >= 0);
2119 }
2120
2121 oop java_lang_reflect_Method::type_annotations(oop method) {
2122 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2123 assert(has_type_annotations_field(), "type_annotations field must be present");
2124 return method->obj_field(type_annotations_offset);
2125 }
2126
2127 void java_lang_reflect_Method::set_type_annotations(oop method, oop value) {
2128 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2129 assert(has_type_annotations_field(), "type_annotations field must be present");
2130 method->obj_field_put(type_annotations_offset, value);
2131 }
2132
2133 void java_lang_reflect_Constructor::compute_offsets() {
2134 Klass* k = SystemDictionary::reflect_Constructor_klass();
2135 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
2136 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
2137 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
2138 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
2139 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2140 // The generic signature and annotations fields are only present in 1.5
2141 signature_offset = -1;
2142 annotations_offset = -1;
2143 parameter_annotations_offset = -1;
2144 type_annotations_offset = -1;
2145 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
2146 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
2147 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
2148 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
2149 }
2150
2151 Handle java_lang_reflect_Constructor::create(TRAPS) {
2152 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2153 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
2154 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2155 instanceKlassHandle klass (THREAD, k);
2156 // Ensure it is initialized
2157 klass->initialize(CHECK_NH);
2158 return klass->allocate_instance_handle(THREAD);
2159 }
2160
2161 oop java_lang_reflect_Constructor::clazz(oop reflect) {
2162 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2163 return reflect->obj_field(clazz_offset);
2164 }
2165
2166 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
2167 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2168 reflect->obj_field_put(clazz_offset, value);
2169 }
2170
2171 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
2172 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2173 return constructor->obj_field(parameterTypes_offset);
2174 }
2175
2176 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
2177 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2178 constructor->obj_field_put(parameterTypes_offset, value);
2179 }
2180
2181 oop java_lang_reflect_Constructor::exception_types(oop constructor) {
2182 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2183 return constructor->obj_field(exceptionTypes_offset);
2184 }
2185
2186 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
2187 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2188 constructor->obj_field_put(exceptionTypes_offset, value);
2189 }
2190
2191 int java_lang_reflect_Constructor::slot(oop reflect) {
2192 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2193 return reflect->int_field(slot_offset);
2194 }
2195
2196 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
2197 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2198 reflect->int_field_put(slot_offset, value);
2199 }
2200
2201 int java_lang_reflect_Constructor::modifiers(oop constructor) {
2202 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2203 return constructor->int_field(modifiers_offset);
2204 }
2205
2206 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
2207 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2208 constructor->int_field_put(modifiers_offset, value);
2209 }
2210
2211 bool java_lang_reflect_Constructor::has_signature_field() {
2212 return (signature_offset >= 0);
2213 }
2214
2215 oop java_lang_reflect_Constructor::signature(oop constructor) {
2216 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2217 assert(has_signature_field(), "signature field must be present");
2218 return constructor->obj_field(signature_offset);
2219 }
2220
2221 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
2222 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2223 assert(has_signature_field(), "signature field must be present");
2224 constructor->obj_field_put(signature_offset, value);
2225 }
2226
2227 bool java_lang_reflect_Constructor::has_annotations_field() {
2228 return (annotations_offset >= 0);
2229 }
2230
2231 oop java_lang_reflect_Constructor::annotations(oop constructor) {
2232 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2233 assert(has_annotations_field(), "annotations field must be present");
2234 return constructor->obj_field(annotations_offset);
2235 }
2236
2237 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
2238 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2239 assert(has_annotations_field(), "annotations field must be present");
2240 constructor->obj_field_put(annotations_offset, value);
2241 }
2242
2243 bool java_lang_reflect_Constructor::has_parameter_annotations_field() {
2244 return (parameter_annotations_offset >= 0);
2245 }
2246
2247 oop java_lang_reflect_Constructor::parameter_annotations(oop method) {
2248 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2249 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2250 return method->obj_field(parameter_annotations_offset);
2251 }
2252
2253 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
2254 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2255 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2256 method->obj_field_put(parameter_annotations_offset, value);
2257 }
2258
2259 bool java_lang_reflect_Constructor::has_type_annotations_field() {
2260 return (type_annotations_offset >= 0);
2261 }
2262
2263 oop java_lang_reflect_Constructor::type_annotations(oop constructor) {
2264 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2265 assert(has_type_annotations_field(), "type_annotations field must be present");
2266 return constructor->obj_field(type_annotations_offset);
2267 }
2268
2269 void java_lang_reflect_Constructor::set_type_annotations(oop constructor, oop value) {
2270 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2271 assert(has_type_annotations_field(), "type_annotations field must be present");
2272 constructor->obj_field_put(type_annotations_offset, value);
2273 }
2274
2275 void java_lang_reflect_Field::compute_offsets() {
2276 Klass* k = SystemDictionary::reflect_Field_klass();
2277 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
2278 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2279 compute_offset(type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature());
2280 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
2281 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2282 // The generic signature and annotations fields are only present in 1.5
2283 signature_offset = -1;
2284 annotations_offset = -1;
2285 type_annotations_offset = -1;
2286 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
2287 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
2288 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
2289 }
2290
2291 Handle java_lang_reflect_Field::create(TRAPS) {
2292 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2293 Symbol* name = vmSymbols::java_lang_reflect_Field();
2294 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2295 instanceKlassHandle klass (THREAD, k);
2296 // Ensure it is initialized
2297 klass->initialize(CHECK_NH);
2298 return klass->allocate_instance_handle(THREAD);
2299 }
2300
2301 oop java_lang_reflect_Field::clazz(oop reflect) {
2302 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2303 return reflect->obj_field(clazz_offset);
2304 }
2305
2306 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
2307 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2308 reflect->obj_field_put(clazz_offset, value);
2309 }
2310
2311 oop java_lang_reflect_Field::name(oop field) {
2312 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2313 return field->obj_field(name_offset);
2314 }
2315
2316 void java_lang_reflect_Field::set_name(oop field, oop value) {
2317 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2318 field->obj_field_put(name_offset, value);
2319 }
2320
2321 oop java_lang_reflect_Field::type(oop field) {
2322 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2323 return field->obj_field(type_offset);
2324 }
2325
2326 void java_lang_reflect_Field::set_type(oop field, oop value) {
2327 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2328 field->obj_field_put(type_offset, value);
2329 }
2330
2331 int java_lang_reflect_Field::slot(oop reflect) {
2332 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2333 return reflect->int_field(slot_offset);
2334 }
2335
2336 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
2337 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2338 reflect->int_field_put(slot_offset, value);
2339 }
2340
2341 int java_lang_reflect_Field::modifiers(oop field) {
2342 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2343 return field->int_field(modifiers_offset);
2344 }
2345
2346 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
2347 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2348 field->int_field_put(modifiers_offset, value);
2349 }
2350
2351 bool java_lang_reflect_Field::has_signature_field() {
2352 return (signature_offset >= 0);
2353 }
2354
2355 oop java_lang_reflect_Field::signature(oop field) {
2356 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2357 assert(has_signature_field(), "signature field must be present");
2358 return field->obj_field(signature_offset);
2359 }
2360
2361 void java_lang_reflect_Field::set_signature(oop field, oop value) {
2362 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2363 assert(has_signature_field(), "signature field must be present");
2364 field->obj_field_put(signature_offset, value);
2365 }
2366
2367 bool java_lang_reflect_Field::has_annotations_field() {
2368 return (annotations_offset >= 0);
2369 }
2370
2371 oop java_lang_reflect_Field::annotations(oop field) {
2372 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2373 assert(has_annotations_field(), "annotations field must be present");
2374 return field->obj_field(annotations_offset);
2375 }
2376
2377 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
2378 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2379 assert(has_annotations_field(), "annotations field must be present");
2380 field->obj_field_put(annotations_offset, value);
2381 }
2382
2383 bool java_lang_reflect_Field::has_type_annotations_field() {
2384 return (type_annotations_offset >= 0);
2385 }
2386
2387 oop java_lang_reflect_Field::type_annotations(oop field) {
2388 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2389 assert(has_type_annotations_field(), "type_annotations field must be present");
2390 return field->obj_field(type_annotations_offset);
2391 }
2392
2393 void java_lang_reflect_Field::set_type_annotations(oop field, oop value) {
2394 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2395 assert(has_type_annotations_field(), "type_annotations field must be present");
2396 field->obj_field_put(type_annotations_offset, value);
2397 }
2398
2399 void sun_reflect_ConstantPool::compute_offsets() {
2400 Klass* k = SystemDictionary::reflect_ConstantPool_klass();
2401 // This null test can be removed post beta
2402 if (k != NULL) {
2403 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
2404 compute_offset(_oop_offset, k, vmSymbols::ConstantPool_name(), vmSymbols::object_signature());
2405 }
2406 }
2407
2408 void java_lang_reflect_Parameter::compute_offsets() {
2409 Klass* k = SystemDictionary::reflect_Parameter_klass();
2410 if(NULL != k) {
2411 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2412 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2413 compute_offset(index_offset, k, vmSymbols::index_name(), vmSymbols::int_signature());
2414 compute_offset(executable_offset, k, vmSymbols::executable_name(), vmSymbols::executable_signature());
2415 }
2416 }
2417
2418 Handle java_lang_reflect_Parameter::create(TRAPS) {
2419 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2420 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
2421 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2422 instanceKlassHandle klass (THREAD, k);
2423 // Ensure it is initialized
2424 klass->initialize(CHECK_NH);
2425 return klass->allocate_instance_handle(THREAD);
2426 }
2427
2428 oop java_lang_reflect_Parameter::name(oop param) {
2429 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2430 return param->obj_field(name_offset);
2431 }
2432
2433 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
2434 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2435 param->obj_field_put(name_offset, value);
2436 }
2437
2438 int java_lang_reflect_Parameter::modifiers(oop param) {
2439 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2440 return param->int_field(modifiers_offset);
2441 }
2442
2443 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
2444 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2445 param->int_field_put(modifiers_offset, value);
2446 }
2447
2448 int java_lang_reflect_Parameter::index(oop param) {
2449 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2450 return param->int_field(index_offset);
2451 }
2452
2453 void java_lang_reflect_Parameter::set_index(oop param, int value) {
2454 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2455 param->int_field_put(index_offset, value);
2456 }
2457
2458 oop java_lang_reflect_Parameter::executable(oop param) {
2459 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2460 return param->obj_field(executable_offset);
2461 }
2462
2463 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
2464 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2465 param->obj_field_put(executable_offset, value);
2466 }
2467
2468
2469 Handle sun_reflect_ConstantPool::create(TRAPS) {
2470 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2471 Klass* k = SystemDictionary::reflect_ConstantPool_klass();
2472 instanceKlassHandle klass (THREAD, k);
2473 // Ensure it is initialized
2474 klass->initialize(CHECK_NH);
2475 return klass->allocate_instance_handle(THREAD);
2476 }
2477
2478
2479 void sun_reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
2480 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2481 oop mirror = value->pool_holder()->java_mirror();
2482 // Save the mirror to get back the constant pool.
2483 reflect->obj_field_put(_oop_offset, mirror);
2484 }
2485
2486 ConstantPool* sun_reflect_ConstantPool::get_cp(oop reflect) {
2487 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2488
2489 oop mirror = reflect->obj_field(_oop_offset);
2490 Klass* k = java_lang_Class::as_Klass(mirror);
2491 assert(k->oop_is_instance(), "Must be");
2492
2493 // Get the constant pool back from the klass. Since class redefinition
2494 // merges the new constant pool into the old, this is essentially the
2495 // same constant pool as the original. If constant pool merging is
2496 // no longer done in the future, this will have to change to save
2497 // the original.
2498 return InstanceKlass::cast(k)->constants();
2499 }
2500
2501 void sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
2502 Klass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass();
2503 // This null test can be removed post beta
2504 if (k != NULL) {
2505 compute_offset(_base_offset, k,
2506 vmSymbols::base_name(), vmSymbols::object_signature());
2507 }
2508 }
2509
2510 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
2511 Klass* k = SystemDictionary::box_klass(type);
2512 if (k == NULL) return NULL;
2513 instanceKlassHandle h (THREAD, k);
2514 if (!h->is_initialized()) h->initialize(CHECK_0);
2515 return h->allocate_instance(THREAD);
2516 }
2517
2518
2519 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
2520 oop box = initialize_and_allocate(type, CHECK_0);
2521 if (box == NULL) return NULL;
2522 switch (type) {
2523 case T_BOOLEAN:
2524 box->bool_field_put(value_offset, value->z);
2525 break;
2526 case T_CHAR:
2527 box->char_field_put(value_offset, value->c);
2528 break;
2529 case T_FLOAT:
2530 box->float_field_put(value_offset, value->f);
2531 break;
2532 case T_DOUBLE:
2533 box->double_field_put(long_value_offset, value->d);
2534 break;
2535 case T_BYTE:
2536 box->byte_field_put(value_offset, value->b);
2537 break;
2538 case T_SHORT:
2539 box->short_field_put(value_offset, value->s);
2540 break;
2541 case T_INT:
2542 box->int_field_put(value_offset, value->i);
2543 break;
2544 case T_LONG:
2545 box->long_field_put(long_value_offset, value->j);
2546 break;
2547 default:
2548 return NULL;
2549 }
2550 return box;
2551 }
2552
2553
2554 BasicType java_lang_boxing_object::basic_type(oop box) {
2555 if (box == NULL) return T_ILLEGAL;
2556 BasicType type = SystemDictionary::box_klass_type(box->klass());
2557 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
2558 return T_ILLEGAL;
2559 return type;
2560 }
2561
2562
2563 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
2564 BasicType type = SystemDictionary::box_klass_type(box->klass());
2565 switch (type) {
2566 case T_BOOLEAN:
2567 value->z = box->bool_field(value_offset);
2568 break;
2569 case T_CHAR:
2570 value->c = box->char_field(value_offset);
2571 break;
2572 case T_FLOAT:
2573 value->f = box->float_field(value_offset);
2574 break;
2575 case T_DOUBLE:
2576 value->d = box->double_field(long_value_offset);
2577 break;
2578 case T_BYTE:
2579 value->b = box->byte_field(value_offset);
2580 break;
2581 case T_SHORT:
2582 value->s = box->short_field(value_offset);
2583 break;
2584 case T_INT:
2585 value->i = box->int_field(value_offset);
2586 break;
2587 case T_LONG:
2588 value->j = box->long_field(long_value_offset);
2589 break;
2590 default:
2591 return T_ILLEGAL;
2592 } // end switch
2593 return type;
2594 }
2595
2596
2597 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
2598 BasicType type = SystemDictionary::box_klass_type(box->klass());
2599 switch (type) {
2600 case T_BOOLEAN:
2601 box->bool_field_put(value_offset, value->z);
2602 break;
2603 case T_CHAR:
2604 box->char_field_put(value_offset, value->c);
2605 break;
2606 case T_FLOAT:
2607 box->float_field_put(value_offset, value->f);
2608 break;
2609 case T_DOUBLE:
2610 box->double_field_put(long_value_offset, value->d);
2611 break;
2612 case T_BYTE:
2613 box->byte_field_put(value_offset, value->b);
2614 break;
2615 case T_SHORT:
2616 box->short_field_put(value_offset, value->s);
2617 break;
2618 case T_INT:
2619 box->int_field_put(value_offset, value->i);
2620 break;
2621 case T_LONG:
2622 box->long_field_put(long_value_offset, value->j);
2623 break;
2624 default:
2625 return T_ILLEGAL;
2626 } // end switch
2627 return type;
2628 }
2629
2630
2631 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
2632 switch (type) {
2633 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
2634 case T_CHAR: st->print("%d", value->c); break;
2635 case T_BYTE: st->print("%d", value->b); break;
2636 case T_SHORT: st->print("%d", value->s); break;
2637 case T_INT: st->print("%d", value->i); break;
2638 case T_LONG: st->print(INT64_FORMAT, value->j); break;
2639 case T_FLOAT: st->print("%f", value->f); break;
2640 case T_DOUBLE: st->print("%lf", value->d); break;
2641 default: st->print("type %d?", type); break;
2642 }
2643 }
2644
2645
2646 // Support for java_lang_ref_Reference
2647 HeapWord *java_lang_ref_Reference::pending_list_lock_addr() {
2648 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2649 address addr = ik->static_field_addr(static_lock_offset);
2650 return (HeapWord*) addr;
2651 }
2652
2653 oop java_lang_ref_Reference::pending_list_lock() {
2654 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2655 address addr = ik->static_field_addr(static_lock_offset);
2656 if (UseCompressedOops) {
2657 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
2658 } else {
2659 return oopDesc::load_decode_heap_oop((oop*)addr);
2660 }
2661 }
2662
2663 HeapWord *java_lang_ref_Reference::pending_list_addr() {
2664 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2665 address addr = ik->static_field_addr(static_pending_offset);
2666 // XXX This might not be HeapWord aligned, almost rather be char *.
2667 return (HeapWord*)addr;
2668 }
2669
2670 oop java_lang_ref_Reference::pending_list() {
2671 char *addr = (char *)pending_list_addr();
2672 if (UseCompressedOops) {
2673 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
2674 } else {
2675 return oopDesc::load_decode_heap_oop((oop*)addr);
2676 }
2677 }
2678
2679
2680 // Support for java_lang_ref_SoftReference
2681
2682 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
2683 return ref->long_field(timestamp_offset);
2684 }
2685
2686 jlong java_lang_ref_SoftReference::clock() {
2687 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass());
2688 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
2689 return *offset;
2690 }
2691
2692 void java_lang_ref_SoftReference::set_clock(jlong value) {
2693 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass());
2694 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
2695 *offset = value;
2696 }
2697
2698 // Support for java_lang_invoke_DirectMethodHandle
2699
2700 int java_lang_invoke_DirectMethodHandle::_member_offset;
2701
2702 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
2703 oop member_name = NULL;
2704 bool is_dmh = dmh->is_oop() && java_lang_invoke_DirectMethodHandle::is_instance(dmh);
2705 assert(is_dmh, "a DirectMethodHandle oop is expected");
2706 if (is_dmh) {
2707 member_name = dmh->obj_field(member_offset_in_bytes());
2708 }
2709 return member_name;
2710 }
2711
2712 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
2713 Klass* klass_oop = SystemDictionary::DirectMethodHandle_klass();
2714 if (klass_oop != NULL) {
2715 compute_offset(_member_offset, klass_oop, vmSymbols::member_name(), vmSymbols::java_lang_invoke_MemberName_signature());
2716 }
2717 }
2718
2719 // Support for java_lang_invoke_MethodHandle
2720
2721 int java_lang_invoke_MethodHandle::_type_offset;
2722 int java_lang_invoke_MethodHandle::_form_offset;
2723
2724 int java_lang_invoke_MemberName::_clazz_offset;
2725 int java_lang_invoke_MemberName::_name_offset;
2726 int java_lang_invoke_MemberName::_type_offset;
2727 int java_lang_invoke_MemberName::_flags_offset;
2728 int java_lang_invoke_MemberName::_vmtarget_offset;
2729 int java_lang_invoke_MemberName::_vmloader_offset;
2730 int java_lang_invoke_MemberName::_vmindex_offset;
2731
2732 int java_lang_invoke_LambdaForm::_vmentry_offset;
2733
2734 void java_lang_invoke_MethodHandle::compute_offsets() {
2735 Klass* klass_oop = SystemDictionary::MethodHandle_klass();
2736 if (klass_oop != NULL) {
2737 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::java_lang_invoke_MethodType_signature());
2738 compute_offset(_form_offset, klass_oop, vmSymbols::form_name(), vmSymbols::java_lang_invoke_LambdaForm_signature());
2739 }
2740 }
2741
2742 void java_lang_invoke_MemberName::compute_offsets() {
2743 Klass* klass_oop = SystemDictionary::MemberName_klass();
2744 if (klass_oop != NULL) {
2745 compute_offset(_clazz_offset, klass_oop, vmSymbols::clazz_name(), vmSymbols::class_signature());
2746 compute_offset(_name_offset, klass_oop, vmSymbols::name_name(), vmSymbols::string_signature());
2747 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::object_signature());
2748 compute_offset(_flags_offset, klass_oop, vmSymbols::flags_name(), vmSymbols::int_signature());
2749 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2750 }
2751 }
2752
2753 void java_lang_invoke_LambdaForm::compute_offsets() {
2754 Klass* klass_oop = SystemDictionary::LambdaForm_klass();
2755 if (klass_oop != NULL) {
2756 compute_offset(_vmentry_offset, klass_oop, vmSymbols::vmentry_name(), vmSymbols::java_lang_invoke_MemberName_signature());
2757 }
2758 }
2759
2760 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
2761 return obj != NULL && is_subclass(obj->klass());
2762 }
2763
2764
2765 oop java_lang_invoke_MethodHandle::type(oop mh) {
2766 return mh->obj_field(_type_offset);
2767 }
2768
2769 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
2770 mh->obj_field_put(_type_offset, mtype);
2771 }
2772
2773 oop java_lang_invoke_MethodHandle::form(oop mh) {
2774 assert(_form_offset != 0, "");
2775 return mh->obj_field(_form_offset);
2776 }
2777
2778 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
2779 assert(_form_offset != 0, "");
2780 mh->obj_field_put(_form_offset, lform);
2781 }
2782
2783 /// MemberName accessors
2784
2785 oop java_lang_invoke_MemberName::clazz(oop mname) {
2786 assert(is_instance(mname), "wrong type");
2787 return mname->obj_field(_clazz_offset);
2788 }
2789
2790 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
2791 assert(is_instance(mname), "wrong type");
2792 mname->obj_field_put(_clazz_offset, clazz);
2793 }
2794
2795 oop java_lang_invoke_MemberName::name(oop mname) {
2796 assert(is_instance(mname), "wrong type");
2797 return mname->obj_field(_name_offset);
2798 }
2799
2800 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
2801 assert(is_instance(mname), "wrong type");
2802 mname->obj_field_put(_name_offset, name);
2803 }
2804
2805 oop java_lang_invoke_MemberName::type(oop mname) {
2806 assert(is_instance(mname), "wrong type");
2807 return mname->obj_field(_type_offset);
2808 }
2809
2810 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
2811 assert(is_instance(mname), "wrong type");
2812 mname->obj_field_put(_type_offset, type);
2813 }
2814
2815 int java_lang_invoke_MemberName::flags(oop mname) {
2816 assert(is_instance(mname), "wrong type");
2817 return mname->int_field(_flags_offset);
2818 }
2819
2820 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
2821 assert(is_instance(mname), "wrong type");
2822 mname->int_field_put(_flags_offset, flags);
2823 }
2824
2825 Metadata* java_lang_invoke_MemberName::vmtarget(oop mname) {
2826 assert(is_instance(mname), "wrong type");
2827 return (Metadata*)mname->address_field(_vmtarget_offset);
2828 }
2829
2830 bool java_lang_invoke_MemberName::is_method(oop mname) {
2831 assert(is_instance(mname), "must be MemberName");
2832 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
2833 }
2834
2835 void java_lang_invoke_MemberName::set_vmtarget(oop mname, Metadata* ref) {
2836 assert(is_instance(mname), "wrong type");
2837 // check the type of the vmtarget
2838 oop dependency = NULL;
2839 if (ref != NULL) {
2840 switch (flags(mname) & (MN_IS_METHOD |
2841 MN_IS_CONSTRUCTOR |
2842 MN_IS_FIELD)) {
2843 case MN_IS_METHOD:
2844 case MN_IS_CONSTRUCTOR:
2845 assert(ref->is_method(), "should be a method");
2846 dependency = ((Method*)ref)->method_holder()->java_mirror();
2847 break;
2848 case MN_IS_FIELD:
2849 assert(ref->is_klass(), "should be a class");
2850 dependency = ((Klass*)ref)->java_mirror();
2851 break;
2852 default:
2853 ShouldNotReachHere();
2854 }
2855 }
2856 mname->address_field_put(_vmtarget_offset, (address)ref);
2857 // Add a reference to the loader (actually mirror because anonymous classes will not have
2858 // distinct loaders) to ensure the metadata is kept alive
2859 // This mirror may be different than the one in clazz field.
2860 mname->obj_field_put(_vmloader_offset, dependency);
2861 }
2862
2863 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
2864 assert(is_instance(mname), "wrong type");
2865 return (intptr_t) mname->address_field(_vmindex_offset);
2866 }
2867
2868 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
2869 assert(is_instance(mname), "wrong type");
2870 mname->address_field_put(_vmindex_offset, (address) index);
2871 }
2872
2873 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
2874 assert(is_instance(lform), "wrong type");
2875 return lform->obj_field(_vmentry_offset);
2876 }
2877
2878
2879 // Support for java_lang_invoke_MethodType
2880
2881 int java_lang_invoke_MethodType::_rtype_offset;
2882 int java_lang_invoke_MethodType::_ptypes_offset;
2883
2884 void java_lang_invoke_MethodType::compute_offsets() {
2885 Klass* k = SystemDictionary::MethodType_klass();
2886 if (k != NULL) {
2887 compute_offset(_rtype_offset, k, vmSymbols::rtype_name(), vmSymbols::class_signature());
2888 compute_offset(_ptypes_offset, k, vmSymbols::ptypes_name(), vmSymbols::class_array_signature());
2889 }
2890 }
2891
2892 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
2893 st->print("(");
2894 objArrayOop pts = ptypes(mt);
2895 for (int i = 0, limit = pts->length(); i < limit; i++) {
2896 java_lang_Class::print_signature(pts->obj_at(i), st);
2897 }
2898 st->print(")");
2899 java_lang_Class::print_signature(rtype(mt), st);
2900 }
2901
2902 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) {
2903 ResourceMark rm;
2904 stringStream buffer(128);
2905 print_signature(mt, &buffer);
2906 const char* sigstr = buffer.base();
2907 int siglen = (int) buffer.size();
2908 Symbol *name;
2909 if (!intern_if_not_found) {
2910 name = SymbolTable::probe(sigstr, siglen);
2911 } else {
2912 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
2913 }
2914 return name;
2915 }
2916
2917 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
2918 if (mt1 == mt2)
2919 return true;
2920 if (rtype(mt1) != rtype(mt2))
2921 return false;
2922 if (ptype_count(mt1) != ptype_count(mt2))
2923 return false;
2924 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
2925 if (ptype(mt1, i) != ptype(mt2, i))
2926 return false;
2927 }
2928 return true;
2929 }
2930
2931 oop java_lang_invoke_MethodType::rtype(oop mt) {
2932 assert(is_instance(mt), "must be a MethodType");
2933 return mt->obj_field(_rtype_offset);
2934 }
2935
2936 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
2937 assert(is_instance(mt), "must be a MethodType");
2938 return (objArrayOop) mt->obj_field(_ptypes_offset);
2939 }
2940
2941 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
2942 return ptypes(mt)->obj_at(idx);
2943 }
2944
2945 int java_lang_invoke_MethodType::ptype_count(oop mt) {
2946 return ptypes(mt)->length();
2947 }
2948
2949 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
2950 objArrayOop pts = ptypes(mt);
2951 int count = pts->length();
2952 int slots = 0;
2953 for (int i = 0; i < count; i++) {
2954 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
2955 slots += type2size[bt];
2956 }
2957 return slots;
2958 }
2959
2960 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
2961 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
2962 return type2size[bt];
2963 }
2964
2965
2966 // Support for java_lang_invoke_CallSite
2967
2968 int java_lang_invoke_CallSite::_target_offset;
2969 int java_lang_invoke_CallSite::_context_offset;
2970 int java_lang_invoke_CallSite::_default_context_offset;
2971
2972 void java_lang_invoke_CallSite::compute_offsets() {
2973 Klass* k = SystemDictionary::CallSite_klass();
2974 if (k != NULL) {
2975 compute_offset(_target_offset, k, vmSymbols::target_name(), vmSymbols::java_lang_invoke_MethodHandle_signature());
2976 compute_offset(_context_offset, k, vmSymbols::context_name(), vmSymbols::sun_misc_Cleaner_signature());
2977 compute_offset(_default_context_offset, k,
2978 vmSymbols::DEFAULT_CONTEXT_name(), vmSymbols::sun_misc_Cleaner_signature(),
2979 /*is_static=*/true, /*allow_super=*/false);
2980 }
2981 }
2982
2983 oop java_lang_invoke_CallSite::context_volatile(oop call_site) {
2984 assert(java_lang_invoke_CallSite::is_instance(call_site), "");
2985
2986 oop dep_oop = call_site->obj_field_volatile(_context_offset);
2987 return dep_oop;
2988 }
2989
2990 void java_lang_invoke_CallSite::set_context_volatile(oop call_site, oop context) {
2991 assert(java_lang_invoke_CallSite::is_instance(call_site), "");
2992 call_site->obj_field_put_volatile(_context_offset, context);
2993 }
2994
2995 bool java_lang_invoke_CallSite::set_context_cas(oop call_site, oop context, oop expected) {
2996 assert(java_lang_invoke_CallSite::is_instance(call_site), "");
2997 HeapWord* context_addr = call_site->obj_field_addr<HeapWord>(_context_offset);
2998 oop res = oopDesc::atomic_compare_exchange_oop(context, context_addr, expected, true);
2999 bool success = (res == expected);
3000 if (success) {
3001 update_barrier_set((void*)context_addr, context);
3002 }
3003 return success;
3004 }
3005
3006 oop java_lang_invoke_CallSite::default_context() {
3007 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::CallSite_klass());
3008 oop def_context_oop = ik->java_mirror()->obj_field(_default_context_offset);
3009 assert(!oopDesc::is_null(def_context_oop), "");
3010 return def_context_oop;
3011 }
3012
3013 // Support for java_security_AccessControlContext
3014
3015 int java_security_AccessControlContext::_context_offset = 0;
3016 int java_security_AccessControlContext::_privilegedContext_offset = 0;
3017 int java_security_AccessControlContext::_isPrivileged_offset = 0;
3018 int java_security_AccessControlContext::_isAuthorized_offset = -1;
3019
3020 void java_security_AccessControlContext::compute_offsets() {
3021 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
3022 fieldDescriptor fd;
3023 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass());
3024
3025 if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) {
3026 fatal("Invalid layout of java.security.AccessControlContext");
3027 }
3028 _context_offset = fd.offset();
3029
3030 if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) {
3031 fatal("Invalid layout of java.security.AccessControlContext");
3032 }
3033 _privilegedContext_offset = fd.offset();
3034
3035 if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) {
3036 fatal("Invalid layout of java.security.AccessControlContext");
3037 }
3038 _isPrivileged_offset = fd.offset();
3039
3040 // The offset may not be present for bootstrapping with older JDK.
3041 if (ik->find_local_field(vmSymbols::isAuthorized_name(), vmSymbols::bool_signature(), &fd)) {
3042 _isAuthorized_offset = fd.offset();
3043 }
3044 }
3045
3046
3047 bool java_security_AccessControlContext::is_authorized(Handle context) {
3048 assert(context.not_null() && context->klass() == SystemDictionary::AccessControlContext_klass(), "Invalid type");
3049 assert(_isAuthorized_offset != -1, "should be set");
3050 return context->bool_field(_isAuthorized_offset) != 0;
3051 }
3052
3053 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
3054 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
3055 // Ensure klass is initialized
3056 InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->initialize(CHECK_0);
3057 // Allocate result
3058 oop result = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->allocate_instance(CHECK_0);
3059 // Fill in values
3060 result->obj_field_put(_context_offset, context());
3061 result->obj_field_put(_privilegedContext_offset, privileged_context());
3062 result->bool_field_put(_isPrivileged_offset, isPrivileged);
3063 // whitelist AccessControlContexts created by the JVM if present
3064 if (_isAuthorized_offset != -1) {
3065 result->bool_field_put(_isAuthorized_offset, true);
3066 }
3067 return result;
3068 }
3069
3070
3071 // Support for java_lang_ClassLoader
3072
3073 bool java_lang_ClassLoader::offsets_computed = false;
3074 int java_lang_ClassLoader::_loader_data_offset = -1;
3075 int java_lang_ClassLoader::parallelCapable_offset = -1;
3076
3077 ClassLoaderData** java_lang_ClassLoader::loader_data_addr(oop loader) {
3078 assert(loader != NULL && loader->is_oop(), "loader must be oop");
3079 return (ClassLoaderData**) loader->address_field_addr(_loader_data_offset);
3080 }
3081
3082 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
3083 return *java_lang_ClassLoader::loader_data_addr(loader);
3084 }
3085
3086 void java_lang_ClassLoader::compute_offsets() {
3087 assert(!offsets_computed, "offsets should be initialized only once");
3088 offsets_computed = true;
3089
3090 // The field indicating parallelCapable (parallelLockMap) is only present starting in 7,
3091 Klass* k1 = SystemDictionary::ClassLoader_klass();
3092 compute_optional_offset(parallelCapable_offset,
3093 k1, vmSymbols::parallelCapable_name(), vmSymbols::concurrenthashmap_signature());
3094
3095 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3096 }
3097
3098 oop java_lang_ClassLoader::parent(oop loader) {
3099 assert(is_instance(loader), "loader must be oop");
3100 return loader->obj_field(parent_offset);
3101 }
3102
3103 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
3104 assert(is_instance(loader), "loader must be oop");
3105 assert(cl == NULL || is_instance(cl), "cl argument must be oop");
3106 oop acl = loader;
3107 debug_only(jint loop_count = 0);
3108 // This loop taken verbatim from ClassLoader.java:
3109 do {
3110 acl = parent(acl);
3111 if (cl == acl) {
3112 return true;
3113 }
3114 assert(++loop_count > 0, "loop_count overflow");
3115 } while (acl != NULL);
3116 return false;
3117 }
3118
3119 bool java_lang_ClassLoader::is_instance(oop obj) {
3120 return obj != NULL && is_subclass(obj->klass());
3121 }
3122
3123
3124 // For class loader classes, parallelCapable defined
3125 // based on non-null field
3126 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
3127 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
3128 if (parallelCapable_offset == -1) {
3129 // Default for backward compatibility is false
3130 return false;
3131 }
3132 return (class_loader->obj_field(parallelCapable_offset) != NULL);
3133 }
3134
3135 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
3136 // Fix for 4474172; see evaluation for more details
3137 loader = non_reflection_class_loader(loader);
3138
3139 oop cl = SystemDictionary::java_system_loader();
3140 while(cl != NULL) {
3141 if (cl == loader) return true;
3142 cl = parent(cl);
3143 }
3144 return false;
3145 }
3146
3147 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
3148 if (loader != NULL) {
3149 // See whether this is one of the class loaders associated with
3150 // the generated bytecodes for reflection, and if so, "magically"
3151 // delegate to its parent to prevent class loading from occurring
3152 // in places where applications using reflection didn't expect it.
3153 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass();
3154 // This might be null in non-1.4 JDKs
3155 if (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)) {
3156 return parent(loader);
3157 }
3158 }
3159 return loader;
3160 }
3161
3162
3163 // Support for java_lang_System
3164 int java_lang_System::in_offset_in_bytes() {
3165 return (InstanceMirrorKlass::offset_of_static_fields() + static_in_offset);
3166 }
3167
3168
3169 int java_lang_System::out_offset_in_bytes() {
3170 return (InstanceMirrorKlass::offset_of_static_fields() + static_out_offset);
3171 }
3172
3173
3174 int java_lang_System::err_offset_in_bytes() {
3175 return (InstanceMirrorKlass::offset_of_static_fields() + static_err_offset);
3176 }
3177
3178
3179 bool java_lang_System::has_security_manager() {
3180 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::System_klass());
3181 address addr = ik->static_field_addr(static_security_offset);
3182 if (UseCompressedOops) {
3183 return oopDesc::load_decode_heap_oop((narrowOop *)addr) != NULL;
3184 } else {
3185 return oopDesc::load_decode_heap_oop((oop*)addr) != NULL;
3186 }
3187 }
3188
3189 int java_lang_Class::_klass_offset;
3190 int java_lang_Class::_array_klass_offset;
3191 int java_lang_Class::_oop_size_offset;
3192 int java_lang_Class::_static_oop_field_count_offset;
3193 int java_lang_Class::_class_loader_offset;
3194 int java_lang_Class::_protection_domain_offset;
3195 int java_lang_Class::_component_mirror_offset;
3196 int java_lang_Class::_init_lock_offset;
3197 int java_lang_Class::_signers_offset;
3198 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL;
3199 int java_lang_Throwable::backtrace_offset;
3200 int java_lang_Throwable::detailMessage_offset;
3201 int java_lang_Throwable::cause_offset;
3202 int java_lang_Throwable::stackTrace_offset;
3203 int java_lang_Throwable::static_unassigned_stacktrace_offset;
3204 int java_lang_reflect_AccessibleObject::override_offset;
3205 int java_lang_reflect_Method::clazz_offset;
3206 int java_lang_reflect_Method::name_offset;
3207 int java_lang_reflect_Method::returnType_offset;
3208 int java_lang_reflect_Method::parameterTypes_offset;
3209 int java_lang_reflect_Method::exceptionTypes_offset;
3210 int java_lang_reflect_Method::slot_offset;
3211 int java_lang_reflect_Method::modifiers_offset;
3212 int java_lang_reflect_Method::signature_offset;
3213 int java_lang_reflect_Method::annotations_offset;
3214 int java_lang_reflect_Method::parameter_annotations_offset;
3215 int java_lang_reflect_Method::annotation_default_offset;
3216 int java_lang_reflect_Method::type_annotations_offset;
3217 int java_lang_reflect_Constructor::clazz_offset;
3218 int java_lang_reflect_Constructor::parameterTypes_offset;
3219 int java_lang_reflect_Constructor::exceptionTypes_offset;
3220 int java_lang_reflect_Constructor::slot_offset;
3221 int java_lang_reflect_Constructor::modifiers_offset;
3222 int java_lang_reflect_Constructor::signature_offset;
3223 int java_lang_reflect_Constructor::annotations_offset;
3224 int java_lang_reflect_Constructor::parameter_annotations_offset;
3225 int java_lang_reflect_Constructor::type_annotations_offset;
3226 int java_lang_reflect_Field::clazz_offset;
3227 int java_lang_reflect_Field::name_offset;
3228 int java_lang_reflect_Field::type_offset;
3229 int java_lang_reflect_Field::slot_offset;
3230 int java_lang_reflect_Field::modifiers_offset;
3231 int java_lang_reflect_Field::signature_offset;
3232 int java_lang_reflect_Field::annotations_offset;
3233 int java_lang_reflect_Field::type_annotations_offset;
3234 int java_lang_reflect_Parameter::name_offset;
3235 int java_lang_reflect_Parameter::modifiers_offset;
3236 int java_lang_reflect_Parameter::index_offset;
3237 int java_lang_reflect_Parameter::executable_offset;
3238 int java_lang_boxing_object::value_offset;
3239 int java_lang_boxing_object::long_value_offset;
3240 int java_lang_ref_Reference::referent_offset;
3241 int java_lang_ref_Reference::queue_offset;
3242 int java_lang_ref_Reference::next_offset;
3243 int java_lang_ref_Reference::discovered_offset;
3244 int java_lang_ref_Reference::static_lock_offset;
3245 int java_lang_ref_Reference::static_pending_offset;
3246 int java_lang_ref_Reference::number_of_fake_oop_fields;
3247 int java_lang_ref_SoftReference::timestamp_offset;
3248 int java_lang_ref_SoftReference::static_clock_offset;
3249 int java_lang_ClassLoader::parent_offset;
3250 int java_lang_System::static_in_offset;
3251 int java_lang_System::static_out_offset;
3252 int java_lang_System::static_err_offset;
3253 int java_lang_System::static_security_offset;
3254 int java_lang_StackTraceElement::declaringClass_offset;
3255 int java_lang_StackTraceElement::methodName_offset;
3256 int java_lang_StackTraceElement::fileName_offset;
3257 int java_lang_StackTraceElement::lineNumber_offset;
3258 int java_lang_AssertionStatusDirectives::classes_offset;
3259 int java_lang_AssertionStatusDirectives::classEnabled_offset;
3260 int java_lang_AssertionStatusDirectives::packages_offset;
3261 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
3262 int java_lang_AssertionStatusDirectives::deflt_offset;
3263 int java_nio_Buffer::_limit_offset;
3264 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0;
3265 int sun_reflect_ConstantPool::_oop_offset;
3266 int sun_reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
3267
3268
3269 // Support for java_lang_StackTraceElement
3270
3271 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
3272 element->obj_field_put(fileName_offset, value);
3273 }
3274
3275 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
3276 element->obj_field_put(declaringClass_offset, value);
3277 }
3278
3279 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
3280 element->obj_field_put(methodName_offset, value);
3281 }
3282
3283 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
3284 element->int_field_put(lineNumber_offset, value);
3285 }
3286
3287
3288 // Support for java Assertions - java_lang_AssertionStatusDirectives.
3289
3290 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
3291 o->obj_field_put(classes_offset, val);
3292 }
3293
3294 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
3295 o->obj_field_put(classEnabled_offset, val);
3296 }
3297
3298 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
3299 o->obj_field_put(packages_offset, val);
3300 }
3301
3302 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
3303 o->obj_field_put(packageEnabled_offset, val);
3304 }
3305
3306 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
3307 o->bool_field_put(deflt_offset, val);
3308 }
3309
3310
3311 // Support for intrinsification of java.nio.Buffer.checkIndex
3312 int java_nio_Buffer::limit_offset() {
3313 return _limit_offset;
3314 }
3315
3316
3317 void java_nio_Buffer::compute_offsets() {
3318 Klass* k = SystemDictionary::nio_Buffer_klass();
3319 assert(k != NULL, "must be loaded in 1.4+");
3320 compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature());
3321 }
3322
3323 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) {
3324 if (_owner_offset != 0) return;
3325
3326 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK);
3327 Klass* k = SystemDictionary::abstract_ownable_synchronizer_klass();
3328 compute_offset(_owner_offset, k,
3329 vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature());
3330 }
3331
3332 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
3333 assert(_owner_offset != 0, "Must be initialized");
3334 return obj->obj_field(_owner_offset);
3335 }
3336
3337 // Compute hard-coded offsets
3338 // Invoked before SystemDictionary::initialize, so pre-loaded classes
3339 // are not available to determine the offset_of_static_fields.
3340 void JavaClasses::compute_hard_coded_offsets() {
3341 const int x = heapOopSize;
3342 const int header = instanceOopDesc::base_offset_in_bytes();
3343
3344 // Throwable Class
3345 java_lang_Throwable::backtrace_offset = java_lang_Throwable::hc_backtrace_offset * x + header;
3346 java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header;
3347 java_lang_Throwable::cause_offset = java_lang_Throwable::hc_cause_offset * x + header;
3348 java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header;
3349 java_lang_Throwable::static_unassigned_stacktrace_offset = java_lang_Throwable::hc_static_unassigned_stacktrace_offset * x;
3350
3351 // java_lang_boxing_object
3352 java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header;
3353 java_lang_boxing_object::long_value_offset = align_size_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong);
3354
3355 // java_lang_ref_Reference:
3356 java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header;
3357 java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header;
3358 java_lang_ref_Reference::next_offset = java_lang_ref_Reference::hc_next_offset * x + header;
3359 java_lang_ref_Reference::discovered_offset = java_lang_ref_Reference::hc_discovered_offset * x + header;
3360 java_lang_ref_Reference::static_lock_offset = java_lang_ref_Reference::hc_static_lock_offset * x;
3361 java_lang_ref_Reference::static_pending_offset = java_lang_ref_Reference::hc_static_pending_offset * x;
3362 // Artificial fields for java_lang_ref_Reference
3363 // The first field is for the discovered field added in 1.4
3364 java_lang_ref_Reference::number_of_fake_oop_fields = 1;
3365
3366 // java_lang_ref_SoftReference Class
3367 java_lang_ref_SoftReference::timestamp_offset = align_size_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong);
3368 // Don't multiply static fields because they are always in wordSize units
3369 java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x;
3370
3371 // java_lang_ClassLoader
3372 java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header;
3373
3374 // java_lang_System
3375 java_lang_System::static_in_offset = java_lang_System::hc_static_in_offset * x;
3376 java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x;
3377 java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x;
3378 java_lang_System::static_security_offset = java_lang_System::hc_static_security_offset * x;
3379
3380 // java_lang_StackTraceElement
3381 java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset * x + header;
3382 java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header;
3383 java_lang_StackTraceElement::fileName_offset = java_lang_StackTraceElement::hc_fileName_offset * x + header;
3384 java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header;
3385 java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header;
3386 java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header;
3387 java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header;
3388 java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header;
3389 java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header;
3390
3391 }
3392
3393
3394 // Compute non-hard-coded field offsets of all the classes in this file
3395 void JavaClasses::compute_offsets() {
3396 // java_lang_Class::compute_offsets was called earlier in bootstrap
3397 java_lang_ClassLoader::compute_offsets();
3398 java_lang_Thread::compute_offsets();
3399 java_lang_ThreadGroup::compute_offsets();
3400 java_lang_invoke_MethodHandle::compute_offsets();
3401 java_lang_invoke_DirectMethodHandle::compute_offsets();
3402 java_lang_invoke_MemberName::compute_offsets();
3403 java_lang_invoke_LambdaForm::compute_offsets();
3404 java_lang_invoke_MethodType::compute_offsets();
3405 java_lang_invoke_CallSite::compute_offsets();
3406 java_security_AccessControlContext::compute_offsets();
3407 // Initialize reflection classes. The layouts of these classes
3408 // changed with the new reflection implementation in JDK 1.4, and
3409 // since the Universe doesn't know what JDK version it is until this
3410 // point we defer computation of these offsets until now.
3411 java_lang_reflect_AccessibleObject::compute_offsets();
3412 java_lang_reflect_Method::compute_offsets();
3413 java_lang_reflect_Constructor::compute_offsets();
3414 java_lang_reflect_Field::compute_offsets();
3415 java_nio_Buffer::compute_offsets();
3416 sun_reflect_ConstantPool::compute_offsets();
3417 sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets();
3418 java_lang_reflect_Parameter::compute_offsets();
3419
3420 // generated interpreter code wants to know about the offsets we just computed:
3421 AbstractAssembler::update_delayed_values();
3422 }
3423
3424 #ifndef PRODUCT
3425
3426 // These functions exist to assert the validity of hard-coded field offsets to guard
3427 // against changes in the class files
3428
3429 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
3430 EXCEPTION_MARK;
3431 fieldDescriptor fd;
3432 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3433 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3434 instanceKlassHandle h_klass (THREAD, k);
3435 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3436 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3437 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3438 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
3439 return false;
3440 }
3441 if (fd.is_static()) {
3442 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
3443 return false;
3444 }
3445 if (fd.offset() == hardcoded_offset ) {
3446 return true;
3447 } else {
3448 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
3449 klass_name, field_name, hardcoded_offset, fd.offset());
3450 return false;
3451 }
3452 }
3453
3454
3455 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
3456 EXCEPTION_MARK;
3457 fieldDescriptor fd;
3458 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3459 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3460 instanceKlassHandle h_klass (THREAD, k);
3461 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3462 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3463 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3464 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3465 return false;
3466 }
3467 if (!fd.is_static()) {
3468 tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name);
3469 return false;
3470 }
3471 if (fd.offset() == hardcoded_offset + InstanceMirrorKlass::offset_of_static_fields()) {
3472 return true;
3473 } else {
3474 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());
3475 return false;
3476 }
3477 }
3478
3479
3480 bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) {
3481 EXCEPTION_MARK;
3482 fieldDescriptor fd;
3483 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3484 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3485 instanceKlassHandle h_klass (THREAD, k);
3486 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3487 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3488 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3489 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3490 return false;
3491 }
3492 if (!fd.is_static() || !fd.has_initial_value()) {
3493 tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name);
3494 return false;
3495 }
3496 if (!fd.initial_value_tag().is_int()) {
3497 tty->print_cr("Static field %s.%s is not an int", klass_name, field_name);
3498 return false;
3499 }
3500 jint field_value = fd.int_initial_value();
3501 if (field_value == hardcoded_constant) {
3502 return true;
3503 } else {
3504 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);
3505 return false;
3506 }
3507 }
3508
3509
3510 // Check the hard-coded field offsets of all the classes in this file
3511
3512 void JavaClasses::check_offsets() {
3513 bool valid = true;
3514 HandleMark hm;
3515
3516 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3517 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
3518
3519 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3520 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
3521
3522 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3523 valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig)
3524
3525 #define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \
3526 valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig)
3527
3528 // java.lang.String
3529
3530 CHECK_OFFSET("java/lang/String", java_lang_String, value, "[C");
3531 if (java_lang_String::has_offset_field()) {
3532 CHECK_OFFSET("java/lang/String", java_lang_String, offset, "I");
3533 CHECK_OFFSET("java/lang/String", java_lang_String, count, "I");
3534 }
3535 if (java_lang_String::has_hash_field()) {
3536 CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I");
3537 }
3538
3539 // java.lang.Class
3540
3541 // Fake fields
3542 // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked
3543 // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked
3544
3545 // java.lang.Throwable
3546
3547 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;");
3548 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;");
3549 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, cause, "Ljava/lang/Throwable;");
3550 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;");
3551
3552 // Boxed primitive objects (java_lang_boxing_object)
3553
3554 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
3555 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
3556 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
3557 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
3558 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
3559 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
3560 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
3561 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
3562
3563 // java.lang.ClassLoader
3564
3565 CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent, "Ljava/lang/ClassLoader;");
3566
3567 // java.lang.System
3568
3569 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, in, "Ljava/io/InputStream;");
3570 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;");
3571 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;");
3572 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, security, "Ljava/lang/SecurityManager;");
3573
3574 // java.lang.StackTraceElement
3575
3576 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;");
3577 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;");
3578 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, fileName, "Ljava/lang/String;");
3579 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I");
3580
3581 // java.lang.ref.Reference
3582
3583 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
3584 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
3585 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
3586 // Fake field
3587 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
3588 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, lock, "Ljava/lang/ref/Reference$Lock;");
3589 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, pending, "Ljava/lang/ref/Reference;");
3590
3591 // java.lang.ref.SoftReference
3592
3593 CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J");
3594 CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J");
3595
3596 // java.lang.AssertionStatusDirectives
3597 //
3598 // The CheckAssertionStatusDirectives boolean can be removed from here and
3599 // globals.hpp after the AssertionStatusDirectives class has been integrated
3600 // into merlin "for some time." Without it, the vm will fail with early
3601 // merlin builds.
3602
3603 if (CheckAssertionStatusDirectives) {
3604 const char* nm = "java/lang/AssertionStatusDirectives";
3605 const char* sig = "[Ljava/lang/String;";
3606 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig);
3607 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z");
3608 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig);
3609 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z");
3610 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z");
3611 }
3612
3613 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
3614 }
3615
3616 #endif // PRODUCT
3617
3618 int InjectedField::compute_offset() {
3619 Klass* klass_oop = klass();
3620 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
3621 if (!may_be_java && !fs.access_flags().is_internal()) {
3622 // Only look at injected fields
3623 continue;
3624 }
3625 if (fs.name() == name() && fs.signature() == signature()) {
3626 return fs.offset();
3627 }
3628 }
3629 ResourceMark rm;
3630 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)" : "");
3631 #ifndef PRODUCT
3632 klass_oop->print();
3633 tty->print_cr("all fields:");
3634 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
3635 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
3636 }
3637 #endif //PRODUCT
3638 vm_exit_during_initialization("Invalid layout of preloaded class: use -XX:+TraceClassLoading to see the origin of the problem class");
3639 return -1;
3640 }
3641
3642 void javaClasses_init() {
3643 JavaClasses::compute_offsets();
3644 JavaClasses::check_offsets();
3645 FilteredFieldsMap::initialize(); // must be done after computing offsets.
3646 }