1 /*
2 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/altHashing.hpp"
27 #include "classfile/javaClasses.hpp"
28 #include "classfile/stringTable.hpp"
29 #include "classfile/vmSymbols.hpp"
30 #include "code/debugInfo.hpp"
31 #include "code/pcDesc.hpp"
32 #include "compiler/compilerOracle.hpp"
33 #include "interpreter/interpreter.hpp"
34 #include "memory/oopFactory.hpp"
35 #include "memory/resourceArea.hpp"
36 #include "memory/universe.inline.hpp"
37 #include "oops/fieldStreams.hpp"
38 #include "oops/instanceKlass.hpp"
39 #include "oops/instanceMirrorKlass.hpp"
40 #include "oops/klass.hpp"
41 #include "oops/method.hpp"
42 #include "oops/symbol.hpp"
43 #include "oops/typeArrayOop.hpp"
44 #include "runtime/fieldDescriptor.hpp"
45 #include "runtime/handles.inline.hpp"
46 #include "runtime/interfaceSupport.hpp"
47 #include "runtime/java.hpp"
48 #include "runtime/javaCalls.hpp"
49 #include "runtime/safepoint.hpp"
50 #include "runtime/thread.inline.hpp"
51 #include "runtime/vframe.hpp"
52 #include "utilities/preserveException.hpp"
53
54 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
55
56 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \
57 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum);
58
59 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \
60 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java },
61
62 InjectedField JavaClasses::_injected_fields[] = {
63 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
64 };
65
66 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
67 return _injected_fields[id].compute_offset();
68 }
69
70
71 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
72 *field_count = 0;
73
74 vmSymbols::SID sid = vmSymbols::find_sid(class_name);
75 if (sid == vmSymbols::NO_SID) {
76 // Only well known classes can inject fields
77 return NULL;
78 }
79
80 int count = 0;
81 int start = -1;
82
83 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
84 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \
85 count++; \
86 if (start == -1) start = klass##_##name##_enum; \
87 }
88 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
89 #undef LOOKUP_INJECTED_FIELD
90
91 if (start != -1) {
92 *field_count = count;
93 return _injected_fields + start;
94 }
95 return NULL;
96 }
97
98
99 static bool find_field(InstanceKlass* ik,
100 Symbol* name_symbol, Symbol* signature_symbol,
101 fieldDescriptor* fd,
102 bool allow_super = false) {
103 if (allow_super)
104 return ik->find_field(name_symbol, signature_symbol, fd) != NULL;
105 else
106 return ik->find_local_field(name_symbol, signature_symbol, fd);
107 }
108
109 // Helpful routine for computing field offsets at run time rather than hardcoding them
110 static void
111 compute_offset(int &dest_offset,
112 Klass* klass_oop, Symbol* name_symbol, Symbol* signature_symbol,
113 bool allow_super = false) {
114 fieldDescriptor fd;
115 InstanceKlass* ik = InstanceKlass::cast(klass_oop);
116 if (!find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) {
117 ResourceMark rm;
118 tty->print_cr("Invalid layout of %s at %s", ik->external_name(), name_symbol->as_C_string());
119 #ifndef PRODUCT
120 klass_oop->print();
121 tty->print_cr("all fields:");
122 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
123 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
124 }
125 #endif //PRODUCT
126 fatal("Invalid layout of preloaded class");
127 }
128 dest_offset = fd.offset();
129 }
130
131 // Same as above but for "optional" offsets that might not be present in certain JDK versions
132 static void
133 compute_optional_offset(int& dest_offset,
134 Klass* klass_oop, Symbol* name_symbol, Symbol* signature_symbol,
135 bool allow_super = false) {
136 fieldDescriptor fd;
137 InstanceKlass* ik = InstanceKlass::cast(klass_oop);
138 if (find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) {
139 dest_offset = fd.offset();
140 }
141 }
142
143
144 int java_lang_String::value_offset = 0;
145 int java_lang_String::offset_offset = 0;
146 int java_lang_String::count_offset = 0;
147 int java_lang_String::hash_offset = 0;
148
149 bool java_lang_String::initialized = false;
150
151 void java_lang_String::compute_offsets() {
152 assert(!initialized, "offsets should be initialized only once");
153
154 Klass* k = SystemDictionary::String_klass();
155 compute_offset(value_offset, k, vmSymbols::value_name(), vmSymbols::char_array_signature());
156 compute_optional_offset(offset_offset, k, vmSymbols::offset_name(), vmSymbols::int_signature());
157 compute_optional_offset(count_offset, k, vmSymbols::count_name(), vmSymbols::int_signature());
158 compute_optional_offset(hash_offset, k, vmSymbols::hash_name(), vmSymbols::int_signature());
159
160 initialized = true;
161 }
162
163 Handle java_lang_String::basic_create(int length, TRAPS) {
164 assert(initialized, "Must be initialized");
165 // Create the String object first, so there's a chance that the String
166 // and the char array it points to end up in the same cache line.
167 oop obj;
168 obj = InstanceKlass::cast(SystemDictionary::String_klass())->allocate_instance(CHECK_NH);
169
170 // Create the char array. The String object must be handlized here
171 // because GC can happen as a result of the allocation attempt.
172 Handle h_obj(THREAD, obj);
173 typeArrayOop buffer;
174 buffer = oopFactory::new_charArray(length, CHECK_NH);
175
176 // Point the String at the char array
177 obj = h_obj();
178 set_value(obj, buffer);
179 // No need to zero the offset, allocation zero'ed the entire String object
180 assert(offset(obj) == 0, "initial String offset should be zero");
181 //set_offset(obj, 0);
182 set_count(obj, length);
183
184 return h_obj;
185 }
186
187 Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) {
188 Handle h_obj = basic_create(length, CHECK_NH);
189 typeArrayOop buffer = value(h_obj());
190 for (int index = 0; index < length; index++) {
191 buffer->char_at_put(index, unicode[index]);
192 }
193 return h_obj;
194 }
195
196 oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) {
197 Handle h_obj = create_from_unicode(unicode, length, CHECK_0);
198 return h_obj();
199 }
200
201 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
202 if (utf8_str == NULL) {
203 return Handle();
204 }
205 int length = UTF8::unicode_length(utf8_str);
206 Handle h_obj = basic_create(length, CHECK_NH);
207 if (length > 0) {
208 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
209 }
210 return h_obj;
211 }
212
213 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
214 Handle h_obj = create_from_str(utf8_str, CHECK_0);
215 return h_obj();
216 }
217
218 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) {
219 int length = UTF8::unicode_length((char*)symbol->bytes(), symbol->utf8_length());
220 Handle h_obj = basic_create(length, CHECK_NH);
221 if (length > 0) {
222 UTF8::convert_to_unicode((char*)symbol->bytes(), value(h_obj())->char_at_addr(0), length);
223 }
224 return h_obj;
225 }
226
227 // Converts a C string to a Java String based on current encoding
228 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
229 assert(str != NULL, "bad arguments");
230
231 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *);
232 static to_java_string_fn_t _to_java_string_fn = NULL;
233
234 if (_to_java_string_fn == NULL) {
235 void *lib_handle = os::native_java_library();
236 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform"));
237 if (_to_java_string_fn == NULL) {
238 fatal("NewStringPlatform missing");
239 }
240 }
241
242 jstring js = NULL;
243 { JavaThread* thread = (JavaThread*)THREAD;
244 assert(thread->is_Java_thread(), "must be java thread");
245 HandleMark hm(thread);
246 ThreadToNativeFromVM ttn(thread);
247 js = (_to_java_string_fn)(thread->jni_environment(), str);
248 }
249 return Handle(THREAD, JNIHandles::resolve(js));
250 }
251
252 // Converts a Java String to a native C string that can be used for
253 // native OS calls.
254 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
255
256 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
257 static to_platform_string_fn_t _to_platform_string_fn = NULL;
258
259 if (_to_platform_string_fn == NULL) {
260 void *lib_handle = os::native_java_library();
261 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
262 if (_to_platform_string_fn == NULL) {
263 fatal("GetStringPlatformChars missing");
264 }
265 }
266
267 char *native_platform_string;
268 { JavaThread* thread = (JavaThread*)THREAD;
269 assert(thread->is_Java_thread(), "must be java thread");
270 JNIEnv *env = thread->jni_environment();
271 jstring js = (jstring) JNIHandles::make_local(env, java_string());
272 bool is_copy;
273 HandleMark hm(thread);
274 ThreadToNativeFromVM ttn(thread);
275 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
276 assert(is_copy == JNI_TRUE, "is_copy value changed");
277 JNIHandles::destroy_local(js);
278 }
279 return native_platform_string;
280 }
281
282 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) {
283 oop obj = java_string();
284 // Typical usage is to convert all '/' to '.' in string.
285 typeArrayOop value = java_lang_String::value(obj);
286 int offset = java_lang_String::offset(obj);
287 int length = java_lang_String::length(obj);
288
289 // First check if any from_char exist
290 int index; // Declared outside, used later
291 for (index = 0; index < length; index++) {
292 if (value->char_at(index + offset) == from_char) {
293 break;
294 }
295 }
296 if (index == length) {
297 // No from_char, so do not copy.
298 return java_string;
299 }
300
301 // Create new UNICODE buffer. Must handlize value because GC
302 // may happen during String and char array creation.
303 typeArrayHandle h_value(THREAD, value);
304 Handle string = basic_create(length, CHECK_NH);
305
306 typeArrayOop from_buffer = h_value();
307 typeArrayOop to_buffer = java_lang_String::value(string());
308
309 // Copy contents
310 for (index = 0; index < length; index++) {
311 jchar c = from_buffer->char_at(index + offset);
312 if (c == from_char) {
313 c = to_char;
314 }
315 to_buffer->char_at_put(index, c);
316 }
317 return string;
318 }
319
320 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
321 typeArrayOop value = java_lang_String::value(java_string);
322 int offset = java_lang_String::offset(java_string);
323 length = java_lang_String::length(java_string);
324
325 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
326 if (result != NULL) {
327 for (int index = 0; index < length; index++) {
328 result[index] = value->char_at(index + offset);
329 }
330 } else {
331 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
332 }
333 return result;
334 }
335
336 unsigned int java_lang_String::hash_code(oop java_string) {
337 int length = java_lang_String::length(java_string);
338 // Zero length string will hash to zero with String.hashCode() function.
339 if (length == 0) return 0;
340
341 typeArrayOop value = java_lang_String::value(java_string);
342 int offset = java_lang_String::offset(java_string);
343 return java_lang_String::hash_code(value->char_at_addr(offset), length);
344 }
345
346 char* java_lang_String::as_quoted_ascii(oop java_string) {
347 typeArrayOop value = java_lang_String::value(java_string);
348 int offset = java_lang_String::offset(java_string);
349 int length = java_lang_String::length(java_string);
350
351 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
352 if (base == NULL) return NULL;
353
354 int result_length = UNICODE::quoted_ascii_length(base, length) + 1;
355 char* result = NEW_RESOURCE_ARRAY(char, result_length);
356 UNICODE::as_quoted_ascii(base, length, result, result_length);
357 assert(result_length >= length + 1, "must not be shorter");
358 assert(result_length == (int)strlen(result) + 1, "must match");
359 return result;
360 }
361
362 unsigned int java_lang_String::hash_string(oop java_string) {
363 int length = java_lang_String::length(java_string);
364 // Zero length string doesn't hash necessarily hash to zero.
365 if (length == 0) {
366 return StringTable::hash_string(NULL, 0);
367 }
368
369 typeArrayOop value = java_lang_String::value(java_string);
370 int offset = java_lang_String::offset(java_string);
371 return StringTable::hash_string(value->char_at_addr(offset), length);
372 }
373
374 Symbol* java_lang_String::as_symbol(Handle java_string, TRAPS) {
375 oop obj = java_string();
376 typeArrayOop value = java_lang_String::value(obj);
377 int offset = java_lang_String::offset(obj);
378 int length = java_lang_String::length(obj);
379 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
380 Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD);
381 return sym;
382 }
383
384 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
385 typeArrayOop value = java_lang_String::value(java_string);
386 int offset = java_lang_String::offset(java_string);
387 int length = java_lang_String::length(java_string);
388 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
389 return SymbolTable::probe_unicode(base, length);
390 }
391
392
393 int java_lang_String::utf8_length(oop java_string) {
394 typeArrayOop value = java_lang_String::value(java_string);
395 int offset = java_lang_String::offset(java_string);
396 int length = java_lang_String::length(java_string);
397 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
398 return UNICODE::utf8_length(position, length);
399 }
400
401 char* java_lang_String::as_utf8_string(oop java_string) {
402 typeArrayOop value = java_lang_String::value(java_string);
403 int offset = java_lang_String::offset(java_string);
404 int length = java_lang_String::length(java_string);
405 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
406 return UNICODE::as_utf8(position, length);
407 }
408
409 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) {
410 typeArrayOop value = java_lang_String::value(java_string);
411 int offset = java_lang_String::offset(java_string);
412 int length = java_lang_String::length(java_string);
413 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
414 return UNICODE::as_utf8(position, length, buf, buflen);
415 }
416
417 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
418 typeArrayOop value = java_lang_String::value(java_string);
419 int offset = java_lang_String::offset(java_string);
420 int length = java_lang_String::length(java_string);
421 assert(start + len <= length, "just checking");
422 jchar* position = value->char_at_addr(offset + start);
423 return UNICODE::as_utf8(position, len);
424 }
425
426 char* java_lang_String::as_utf8_string(oop java_string, int start, int len, char* buf, int buflen) {
427 typeArrayOop value = java_lang_String::value(java_string);
428 int offset = java_lang_String::offset(java_string);
429 int length = java_lang_String::length(java_string);
430 assert(start + len <= length, "just checking");
431 jchar* position = value->char_at_addr(offset + start);
432 return UNICODE::as_utf8(position, len, buf, buflen);
433 }
434
435 bool java_lang_String::equals(oop java_string, jchar* chars, int len) {
436 assert(java_string->klass() == SystemDictionary::String_klass(),
437 "must be java_string");
438 typeArrayOop value = java_lang_String::value(java_string);
439 int offset = java_lang_String::offset(java_string);
440 int length = java_lang_String::length(java_string);
441 if (length != len) {
442 return false;
443 }
444 for (int i = 0; i < len; i++) {
445 if (value->char_at(i + offset) != chars[i]) {
446 return false;
447 }
448 }
449 return true;
450 }
451
452 bool java_lang_String::equals(oop str1, oop str2) {
453 assert(str1->klass() == SystemDictionary::String_klass(),
454 "must be java String");
455 assert(str2->klass() == SystemDictionary::String_klass(),
456 "must be java String");
457 typeArrayOop value1 = java_lang_String::value(str1);
458 int offset1 = java_lang_String::offset(str1);
459 int length1 = java_lang_String::length(str1);
460 typeArrayOop value2 = java_lang_String::value(str2);
461 int offset2 = java_lang_String::offset(str2);
462 int length2 = java_lang_String::length(str2);
463
464 if (length1 != length2) {
465 return false;
466 }
467 for (int i = 0; i < length1; i++) {
468 if (value1->char_at(i + offset1) != value2->char_at(i + offset2)) {
469 return false;
470 }
471 }
472 return true;
473 }
474
475 void java_lang_String::print(oop java_string, outputStream* st) {
476 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string");
477 typeArrayOop value = java_lang_String::value(java_string);
478
479 if (value == NULL) {
480 // This can happen if, e.g., printing a String
481 // object before its initializer has been called
482 st->print("NULL");
483 return;
484 }
485
486 int offset = java_lang_String::offset(java_string);
487 int length = java_lang_String::length(java_string);
488
489 st->print("\"");
490 for (int index = 0; index < length; index++) {
491 st->print("%c", value->char_at(index + offset));
492 }
493 st->print("\"");
494 }
495
496
497 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
498 assert(mirror.not_null() && fd->is_static(), "just checking");
499 if (fd->has_initial_value()) {
500 BasicType t = fd->field_type();
501 switch (t) {
502 case T_BYTE:
503 mirror()->byte_field_put(fd->offset(), fd->int_initial_value());
504 break;
505 case T_BOOLEAN:
506 mirror()->bool_field_put(fd->offset(), fd->int_initial_value());
507 break;
508 case T_CHAR:
509 mirror()->char_field_put(fd->offset(), fd->int_initial_value());
510 break;
511 case T_SHORT:
512 mirror()->short_field_put(fd->offset(), fd->int_initial_value());
513 break;
514 case T_INT:
515 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
516 break;
517 case T_FLOAT:
518 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
519 break;
520 case T_DOUBLE:
521 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
522 break;
523 case T_LONG:
524 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
525 break;
526 case T_OBJECT:
527 {
528 #ifdef ASSERT
529 TempNewSymbol sym = SymbolTable::new_symbol("Ljava/lang/String;", CHECK);
530 assert(fd->signature() == sym, "just checking");
531 #endif
532 oop string = fd->string_initial_value(CHECK);
533 mirror()->obj_field_put(fd->offset(), string);
534 }
535 break;
536 default:
537 THROW_MSG(vmSymbols::java_lang_ClassFormatError(),
538 "Illegal ConstantValue attribute in class file");
539 }
540 }
541 }
542
543
544 void java_lang_Class::fixup_mirror(KlassHandle k, TRAPS) {
545 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
546
547 // If the offset was read from the shared archive, it was fixed up already
548 if (!k->is_shared()) {
549 if (k->oop_is_instance()) {
550 // During bootstrap, java.lang.Class wasn't loaded so static field
551 // offsets were computed without the size added it. Go back and
552 // update all the static field offsets to included the size.
553 for (JavaFieldStream fs(InstanceKlass::cast(k())); !fs.done(); fs.next()) {
554 if (fs.access_flags().is_static()) {
555 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields();
556 fs.set_offset(real_offset);
557 }
558 }
559 }
560 }
561 create_mirror(k, Handle(NULL), Handle(NULL), CHECK);
562 }
563
564 void java_lang_Class::initialize_mirror_fields(KlassHandle k,
565 Handle mirror,
566 Handle protection_domain,
567 TRAPS) {
568 // Allocate a simple java object for a lock.
569 // This needs to be a java object because during class initialization
570 // it can be held across a java call.
571 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
572 set_init_lock(mirror(), r);
573
574 // Set protection domain also
575 set_protection_domain(mirror(), protection_domain());
576
577 // Initialize static fields
578 InstanceKlass::cast(k())->do_local_static_fields(&initialize_static_field, mirror, CHECK);
579 }
580
581 void java_lang_Class::create_mirror(KlassHandle k, Handle class_loader,
582 Handle protection_domain, TRAPS) {
583 assert(k->java_mirror() == NULL, "should only assign mirror once");
584 // Use this moment of initialization to cache modifier_flags also,
585 // to support Class.getModifiers(). Instance classes recalculate
586 // the cached flags after the class file is parsed, but before the
587 // class is put into the system dictionary.
588 int computed_modifiers = k->compute_modifier_flags(CHECK);
589 k->set_modifier_flags(computed_modifiers);
590 // Class_klass has to be loaded because it is used to allocate
591 // the mirror.
592 if (SystemDictionary::Class_klass_loaded()) {
593 // Allocate mirror (java.lang.Class instance)
594 Handle mirror = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK);
595
596 // Setup indirection from mirror->klass
597 if (!k.is_null()) {
598 java_lang_Class::set_klass(mirror(), k());
599 }
600
601 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
602 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
603
604 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
605
606 // It might also have a component mirror. This mirror must already exist.
607 if (k->oop_is_array()) {
608 Handle comp_mirror;
609 if (k->oop_is_typeArray()) {
610 BasicType type = TypeArrayKlass::cast(k())->element_type();
611 comp_mirror = Universe::java_mirror(type);
612 } else {
613 assert(k->oop_is_objArray(), "Must be");
614 Klass* element_klass = ObjArrayKlass::cast(k())->element_klass();
615 assert(element_klass != NULL, "Must have an element klass");
616 comp_mirror = element_klass->java_mirror();
617 }
618 assert(comp_mirror.not_null(), "must have a mirror");
619
620 // Two-way link between the array klass and its component mirror:
621 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
622 set_component_mirror(mirror(), comp_mirror());
623 set_array_klass(comp_mirror(), k());
624 } else {
625 assert(k->oop_is_instance(), "Must be");
626
627 initialize_mirror_fields(k, mirror, protection_domain, THREAD);
628 if (HAS_PENDING_EXCEPTION) {
629 // If any of the fields throws an exception like OOM remove the klass field
630 // from the mirror so GC doesn't follow it after the klass has been deallocated.
631 // This mirror looks like a primitive type, which logically it is because it
632 // it represents no class.
633 java_lang_Class::set_klass(mirror(), NULL);
634 return;
635 }
636 }
637
638 // set the classLoader field in the java_lang_Class instance
639 assert(class_loader() == k->class_loader(), "should be same");
640 set_class_loader(mirror(), class_loader());
641
642 // Setup indirection from klass->mirror last
643 // after any exceptions can happen during allocations.
644 if (!k.is_null()) {
645 k->set_java_mirror(mirror());
646 }
647 } else {
648 if (fixup_mirror_list() == NULL) {
649 GrowableArray<Klass*>* list =
650 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true);
651 set_fixup_mirror_list(list);
652 }
653 fixup_mirror_list()->push(k());
654 }
655 }
656
657
658 int java_lang_Class::oop_size(oop java_class) {
659 assert(_oop_size_offset != 0, "must be set");
660 return java_class->int_field(_oop_size_offset);
661 }
662 void java_lang_Class::set_oop_size(oop java_class, int size) {
663 assert(_oop_size_offset != 0, "must be set");
664 java_class->int_field_put(_oop_size_offset, size);
665 }
666 int java_lang_Class::static_oop_field_count(oop java_class) {
667 assert(_static_oop_field_count_offset != 0, "must be set");
668 return java_class->int_field(_static_oop_field_count_offset);
669 }
670 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
671 assert(_static_oop_field_count_offset != 0, "must be set");
672 java_class->int_field_put(_static_oop_field_count_offset, size);
673 }
674
675 oop java_lang_Class::protection_domain(oop java_class) {
676 assert(_protection_domain_offset != 0, "must be set");
677 return java_class->obj_field(_protection_domain_offset);
678 }
679 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
680 assert(_protection_domain_offset != 0, "must be set");
681 java_class->obj_field_put(_protection_domain_offset, pd);
682 }
683
684 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
685 assert(_component_mirror_offset != 0, "must be set");
686 java_class->obj_field_put(_component_mirror_offset, comp_mirror);
687 }
688 oop java_lang_Class::component_mirror(oop java_class) {
689 assert(_component_mirror_offset != 0, "must be set");
690 return java_class->obj_field(_component_mirror_offset);
691 }
692
693 oop java_lang_Class::init_lock(oop java_class) {
694 assert(_init_lock_offset != 0, "must be set");
695 return java_class->obj_field(_init_lock_offset);
696 }
697 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
698 assert(_init_lock_offset != 0, "must be set");
699 java_class->obj_field_put(_init_lock_offset, init_lock);
700 }
701
702 objArrayOop java_lang_Class::signers(oop java_class) {
703 assert(_signers_offset != 0, "must be set");
704 return (objArrayOop)java_class->obj_field(_signers_offset);
705 }
706 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) {
707 assert(_signers_offset != 0, "must be set");
708 java_class->obj_field_put(_signers_offset, (oop)signers);
709 }
710
711
712 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
713 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet.
714 if (_class_loader_offset != 0) {
715 java_class->obj_field_put(_class_loader_offset, loader);
716 }
717 }
718
719 oop java_lang_Class::class_loader(oop java_class) {
720 assert(_class_loader_offset != 0, "must be set");
721 return java_class->obj_field(_class_loader_offset);
722 }
723
724 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
725 // This should be improved by adding a field at the Java level or by
726 // introducing a new VM klass (see comment in ClassFileParser)
727 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0);
728 if (type != T_VOID) {
729 Klass* aklass = Universe::typeArrayKlassObj(type);
730 assert(aklass != NULL, "correct bootstrap");
731 set_array_klass(java_class, aklass);
732 }
733 #ifdef ASSERT
734 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass());
735 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
736 #endif
737 return java_class;
738 }
739
740
741 Klass* java_lang_Class::as_Klass(oop java_class) {
742 //%note memory_2
743 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
744 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset));
745 assert(k == NULL || k->is_klass(), "type check");
746 return k;
747 }
748
749
750 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
751 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
752 java_class->metadata_field_put(_klass_offset, klass);
753 }
754
755
756 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
757 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
758 Symbol* name = NULL;
759 bool is_instance = false;
760 if (is_primitive(java_class)) {
761 name = vmSymbols::type_signature(primitive_type(java_class));
762 } else {
763 Klass* k = as_Klass(java_class);
764 is_instance = k->oop_is_instance();
765 name = k->name();
766 }
767 if (name == NULL) {
768 st->print("<null>");
769 return;
770 }
771 if (is_instance) st->print("L");
772 st->write((char*) name->base(), (int) name->utf8_length());
773 if (is_instance) st->print(";");
774 }
775
776 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) {
777 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
778 Symbol* name;
779 if (is_primitive(java_class)) {
780 name = vmSymbols::type_signature(primitive_type(java_class));
781 // Because this can create a new symbol, the caller has to decrement
782 // the refcount, so make adjustment here and below for symbols returned
783 // that are not created or incremented due to a successful lookup.
784 name->increment_refcount();
785 } else {
786 Klass* k = as_Klass(java_class);
787 if (!k->oop_is_instance()) {
788 name = k->name();
789 name->increment_refcount();
790 } else {
791 ResourceMark rm;
792 const char* sigstr = k->signature_name();
793 int siglen = (int) strlen(sigstr);
794 if (!intern_if_not_found) {
795 name = SymbolTable::probe(sigstr, siglen);
796 } else {
797 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
798 }
799 }
800 }
801 return name;
802 }
803
804
805 Klass* java_lang_Class::array_klass(oop java_class) {
806 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
807 assert(k == NULL || k->is_klass() && k->oop_is_array(), "should be array klass");
808 return k;
809 }
810
811
812 void java_lang_Class::set_array_klass(oop java_class, Klass* klass) {
813 assert(klass->is_klass() && klass->oop_is_array(), "should be array klass");
814 java_class->metadata_field_put(_array_klass_offset, klass);
815 }
816
817
818 bool java_lang_Class::is_primitive(oop java_class) {
819 // should assert:
820 //assert(java_lang_Class::is_instance(java_class), "must be a Class object");
821 bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL);
822
823 #ifdef ASSERT
824 if (is_primitive) {
825 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
826 assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()),
827 "Should be either the T_VOID primitive or a java primitive");
828 }
829 #endif
830
831 return is_primitive;
832 }
833
834
835 BasicType java_lang_Class::primitive_type(oop java_class) {
836 assert(java_lang_Class::is_primitive(java_class), "just checking");
837 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
838 BasicType type = T_VOID;
839 if (ak != NULL) {
840 // Note: create_basic_type_mirror above initializes ak to a non-null value.
841 type = ArrayKlass::cast(ak)->element_type();
842 } else {
843 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
844 }
845 assert(Universe::java_mirror(type) == java_class, "must be consistent");
846 return type;
847 }
848
849 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
850 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
851 if (is_primitive(java_class)) {
852 if (reference_klass != NULL)
853 (*reference_klass) = NULL;
854 return primitive_type(java_class);
855 } else {
856 if (reference_klass != NULL)
857 (*reference_klass) = as_Klass(java_class);
858 return T_OBJECT;
859 }
860 }
861
862
863 oop java_lang_Class::primitive_mirror(BasicType t) {
864 oop mirror = Universe::java_mirror(t);
865 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class");
866 assert(java_lang_Class::is_primitive(mirror), "must be primitive");
867 return mirror;
868 }
869
870 bool java_lang_Class::offsets_computed = false;
871 int java_lang_Class::classRedefinedCount_offset = -1;
872
873 void java_lang_Class::compute_offsets() {
874 assert(!offsets_computed, "offsets should be initialized only once");
875 offsets_computed = true;
876
877 Klass* k = SystemDictionary::Class_klass();
878 // The classRedefinedCount field is only present starting in 1.5,
879 // so don't go fatal.
880 compute_optional_offset(classRedefinedCount_offset,
881 k, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature());
882
883 // Needs to be optional because the old build runs Queens during bootstrapping
884 // and jdk8-9 doesn't have coordinated pushes yet.
885 compute_optional_offset(_class_loader_offset,
886 k, vmSymbols::classLoader_name(),
887 vmSymbols::classloader_signature());
888
889 compute_offset(_component_mirror_offset,
890 k, vmSymbols::componentType_name(),
891 vmSymbols::class_signature());
892
893 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have
894 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops
895 // GC treats them the same.
896 _init_lock_offset = _component_mirror_offset;
897
898 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
899 }
900
901 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
902 if (classRedefinedCount_offset == -1) {
903 // If we don't have an offset for it then just return -1 as a marker.
904 return -1;
905 }
906
907 return the_class_mirror->int_field(classRedefinedCount_offset);
908 }
909
910 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
911 if (classRedefinedCount_offset == -1) {
912 // If we don't have an offset for it then nothing to set.
913 return;
914 }
915
916 the_class_mirror->int_field_put(classRedefinedCount_offset, value);
917 }
918
919
920 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
921 // platform thread structure, and a eetop offset which was used for thread
922 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
923 // merged, so in the HotSpot VM we just use the eetop field for the thread
924 // instead of the privateInfo_offset.
925 //
926 // Note: The stackSize field is only present starting in 1.4.
927
928 int java_lang_Thread::_name_offset = 0;
929 int java_lang_Thread::_group_offset = 0;
930 int java_lang_Thread::_contextClassLoader_offset = 0;
931 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
932 int java_lang_Thread::_priority_offset = 0;
933 int java_lang_Thread::_eetop_offset = 0;
934 int java_lang_Thread::_daemon_offset = 0;
935 int java_lang_Thread::_stillborn_offset = 0;
936 int java_lang_Thread::_stackSize_offset = 0;
937 int java_lang_Thread::_tid_offset = 0;
938 int java_lang_Thread::_thread_status_offset = 0;
939 int java_lang_Thread::_park_blocker_offset = 0;
940 int java_lang_Thread::_park_event_offset = 0 ;
941
942
943 void java_lang_Thread::compute_offsets() {
944 assert(_group_offset == 0, "offsets should be initialized only once");
945
946 Klass* k = SystemDictionary::Thread_klass();
947 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::char_array_signature());
948 compute_offset(_group_offset, k, vmSymbols::group_name(), vmSymbols::threadgroup_signature());
949 compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature());
950 compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature());
951 compute_offset(_priority_offset, k, vmSymbols::priority_name(), vmSymbols::int_signature());
952 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
953 compute_offset(_eetop_offset, k, vmSymbols::eetop_name(), vmSymbols::long_signature());
954 compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature());
955 // The stackSize field is only present starting in 1.4, so don't go fatal.
956 compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature());
957 // The tid and thread_status fields are only present starting in 1.5, so don't go fatal.
958 compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature());
959 compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature());
960 // The parkBlocker field is only present starting in 1.6, so don't go fatal.
961 compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature());
962 compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(),
963 vmSymbols::long_signature());
964 }
965
966
967 JavaThread* java_lang_Thread::thread(oop java_thread) {
968 return (JavaThread*)java_thread->address_field(_eetop_offset);
969 }
970
971
972 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
973 java_thread->address_field_put(_eetop_offset, (address)thread);
974 }
975
976
977 typeArrayOop java_lang_Thread::name(oop java_thread) {
978 oop name = java_thread->obj_field(_name_offset);
979 assert(name == NULL || (name->is_typeArray() && TypeArrayKlass::cast(name->klass())->element_type() == T_CHAR), "just checking");
980 return typeArrayOop(name);
981 }
982
983
984 void java_lang_Thread::set_name(oop java_thread, typeArrayOop name) {
985 assert(java_thread->obj_field(_name_offset) == NULL, "name should be NULL");
986 java_thread->obj_field_put(_name_offset, name);
987 }
988
989
990 ThreadPriority java_lang_Thread::priority(oop java_thread) {
991 return (ThreadPriority)java_thread->int_field(_priority_offset);
992 }
993
994
995 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
996 java_thread->int_field_put(_priority_offset, priority);
997 }
998
999
1000 oop java_lang_Thread::threadGroup(oop java_thread) {
1001 return java_thread->obj_field(_group_offset);
1002 }
1003
1004
1005 bool java_lang_Thread::is_stillborn(oop java_thread) {
1006 return java_thread->bool_field(_stillborn_offset) != 0;
1007 }
1008
1009
1010 // We never have reason to turn the stillborn bit off
1011 void java_lang_Thread::set_stillborn(oop java_thread) {
1012 java_thread->bool_field_put(_stillborn_offset, true);
1013 }
1014
1015
1016 bool java_lang_Thread::is_alive(oop java_thread) {
1017 JavaThread* thr = java_lang_Thread::thread(java_thread);
1018 return (thr != NULL);
1019 }
1020
1021
1022 bool java_lang_Thread::is_daemon(oop java_thread) {
1023 return java_thread->bool_field(_daemon_offset) != 0;
1024 }
1025
1026
1027 void java_lang_Thread::set_daemon(oop java_thread) {
1028 java_thread->bool_field_put(_daemon_offset, true);
1029 }
1030
1031 oop java_lang_Thread::context_class_loader(oop java_thread) {
1032 return java_thread->obj_field(_contextClassLoader_offset);
1033 }
1034
1035 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
1036 return java_thread->obj_field(_inheritedAccessControlContext_offset);
1037 }
1038
1039
1040 jlong java_lang_Thread::stackSize(oop java_thread) {
1041 if (_stackSize_offset > 0) {
1042 return java_thread->long_field(_stackSize_offset);
1043 } else {
1044 return 0;
1045 }
1046 }
1047
1048 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1049 void java_lang_Thread::set_thread_status(oop java_thread,
1050 java_lang_Thread::ThreadStatus status) {
1051 // The threadStatus is only present starting in 1.5
1052 if (_thread_status_offset > 0) {
1053 java_thread->int_field_put(_thread_status_offset, status);
1054 }
1055 }
1056
1057 // Read thread status value from threadStatus field in java.lang.Thread java class.
1058 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1059 assert(Thread::current()->is_Watcher_thread() || Thread::current()->is_VM_thread() ||
1060 JavaThread::current()->thread_state() == _thread_in_vm,
1061 "Java Thread is not running in vm");
1062 // The threadStatus is only present starting in 1.5
1063 if (_thread_status_offset > 0) {
1064 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1065 } else {
1066 // All we can easily figure out is if it is alive, but that is
1067 // enough info for a valid unknown status.
1068 // These aren't restricted to valid set ThreadStatus values, so
1069 // use JVMTI values and cast.
1070 JavaThread* thr = java_lang_Thread::thread(java_thread);
1071 if (thr == NULL) {
1072 // the thread hasn't run yet or is in the process of exiting
1073 return NEW;
1074 }
1075 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE;
1076 }
1077 }
1078
1079
1080 jlong java_lang_Thread::thread_id(oop java_thread) {
1081 // The thread ID field is only present starting in 1.5
1082 if (_tid_offset > 0) {
1083 return java_thread->long_field(_tid_offset);
1084 } else {
1085 return 0;
1086 }
1087 }
1088
1089 oop java_lang_Thread::park_blocker(oop java_thread) {
1090 assert(JDK_Version::current().supports_thread_park_blocker() &&
1091 _park_blocker_offset != 0, "Must support parkBlocker field");
1092
1093 if (_park_blocker_offset > 0) {
1094 return java_thread->obj_field(_park_blocker_offset);
1095 }
1096
1097 return NULL;
1098 }
1099
1100 jlong java_lang_Thread::park_event(oop java_thread) {
1101 if (_park_event_offset > 0) {
1102 return java_thread->long_field(_park_event_offset);
1103 }
1104 return 0;
1105 }
1106
1107 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) {
1108 if (_park_event_offset > 0) {
1109 java_thread->long_field_put(_park_event_offset, ptr);
1110 return true;
1111 }
1112 return false;
1113 }
1114
1115
1116 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1117 assert(_thread_status_offset != 0, "Must have thread status");
1118 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1119 switch (status) {
1120 case NEW : return "NEW";
1121 case RUNNABLE : return "RUNNABLE";
1122 case SLEEPING : return "TIMED_WAITING (sleeping)";
1123 case IN_OBJECT_WAIT : return "WAITING (on object monitor)";
1124 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
1125 case PARKED : return "WAITING (parking)";
1126 case PARKED_TIMED : return "TIMED_WAITING (parking)";
1127 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1128 case TERMINATED : return "TERMINATED";
1129 default : return "UNKNOWN";
1130 };
1131 }
1132 int java_lang_ThreadGroup::_parent_offset = 0;
1133 int java_lang_ThreadGroup::_name_offset = 0;
1134 int java_lang_ThreadGroup::_threads_offset = 0;
1135 int java_lang_ThreadGroup::_groups_offset = 0;
1136 int java_lang_ThreadGroup::_maxPriority_offset = 0;
1137 int java_lang_ThreadGroup::_destroyed_offset = 0;
1138 int java_lang_ThreadGroup::_daemon_offset = 0;
1139 int java_lang_ThreadGroup::_vmAllowSuspension_offset = 0;
1140 int java_lang_ThreadGroup::_nthreads_offset = 0;
1141 int java_lang_ThreadGroup::_ngroups_offset = 0;
1142
1143 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
1144 assert(java_thread_group->is_oop(), "thread group must be oop");
1145 return java_thread_group->obj_field(_parent_offset);
1146 }
1147
1148 // ("name as oop" accessor is not necessary)
1149
1150 typeArrayOop java_lang_ThreadGroup::name(oop java_thread_group) {
1151 oop name = java_thread_group->obj_field(_name_offset);
1152 // ThreadGroup.name can be null
1153 return name == NULL ? (typeArrayOop)NULL : java_lang_String::value(name);
1154 }
1155
1156 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
1157 assert(java_thread_group->is_oop(), "thread group must be oop");
1158 return java_thread_group->int_field(_nthreads_offset);
1159 }
1160
1161 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
1162 oop threads = java_thread_group->obj_field(_threads_offset);
1163 assert(threads != NULL, "threadgroups should have threads");
1164 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
1165 return objArrayOop(threads);
1166 }
1167
1168 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
1169 assert(java_thread_group->is_oop(), "thread group must be oop");
1170 return java_thread_group->int_field(_ngroups_offset);
1171 }
1172
1173 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
1174 oop groups = java_thread_group->obj_field(_groups_offset);
1175 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
1176 return objArrayOop(groups);
1177 }
1178
1179 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1180 assert(java_thread_group->is_oop(), "thread group must be oop");
1181 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1182 }
1183
1184 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
1185 assert(java_thread_group->is_oop(), "thread group must be oop");
1186 return java_thread_group->bool_field(_destroyed_offset) != 0;
1187 }
1188
1189 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1190 assert(java_thread_group->is_oop(), "thread group must be oop");
1191 return java_thread_group->bool_field(_daemon_offset) != 0;
1192 }
1193
1194 bool java_lang_ThreadGroup::is_vmAllowSuspension(oop java_thread_group) {
1195 assert(java_thread_group->is_oop(), "thread group must be oop");
1196 return java_thread_group->bool_field(_vmAllowSuspension_offset) != 0;
1197 }
1198
1199 void java_lang_ThreadGroup::compute_offsets() {
1200 assert(_parent_offset == 0, "offsets should be initialized only once");
1201
1202 Klass* k = SystemDictionary::ThreadGroup_klass();
1203
1204 compute_offset(_parent_offset, k, vmSymbols::parent_name(), vmSymbols::threadgroup_signature());
1205 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1206 compute_offset(_threads_offset, k, vmSymbols::threads_name(), vmSymbols::thread_array_signature());
1207 compute_offset(_groups_offset, k, vmSymbols::groups_name(), vmSymbols::threadgroup_array_signature());
1208 compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature());
1209 compute_offset(_destroyed_offset, k, vmSymbols::destroyed_name(), vmSymbols::bool_signature());
1210 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
1211 compute_offset(_vmAllowSuspension_offset, k, vmSymbols::vmAllowSuspension_name(), vmSymbols::bool_signature());
1212 compute_offset(_nthreads_offset, k, vmSymbols::nthreads_name(), vmSymbols::int_signature());
1213 compute_offset(_ngroups_offset, k, vmSymbols::ngroups_name(), vmSymbols::int_signature());
1214 }
1215
1216 oop java_lang_Throwable::unassigned_stacktrace() {
1217 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Throwable_klass());
1218 address addr = ik->static_field_addr(static_unassigned_stacktrace_offset);
1219 if (UseCompressedOops) {
1220 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
1221 } else {
1222 return oopDesc::load_decode_heap_oop((oop*)addr);
1223 }
1224 }
1225
1226 oop java_lang_Throwable::backtrace(oop throwable) {
1227 return throwable->obj_field_acquire(backtrace_offset);
1228 }
1229
1230
1231 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
1232 throwable->release_obj_field_put(backtrace_offset, value);
1233 }
1234
1235
1236 oop java_lang_Throwable::message(oop throwable) {
1237 return throwable->obj_field(detailMessage_offset);
1238 }
1239
1240
1241 oop java_lang_Throwable::message(Handle throwable) {
1242 return throwable->obj_field(detailMessage_offset);
1243 }
1244
1245
1246 // Return Symbol for detailed_message or NULL
1247 Symbol* java_lang_Throwable::detail_message(oop throwable) {
1248 PRESERVE_EXCEPTION_MARK; // Keep original exception
1249 oop detailed_message = java_lang_Throwable::message(throwable);
1250 if (detailed_message != NULL) {
1251 return java_lang_String::as_symbol(detailed_message, THREAD);
1252 }
1253 return NULL;
1254 }
1255
1256 void java_lang_Throwable::set_message(oop throwable, oop value) {
1257 throwable->obj_field_put(detailMessage_offset, value);
1258 }
1259
1260
1261 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
1262 throwable->obj_field_put(stackTrace_offset, st_element_array);
1263 }
1264
1265 void java_lang_Throwable::clear_stacktrace(oop throwable) {
1266 set_stacktrace(throwable, NULL);
1267 }
1268
1269
1270 void java_lang_Throwable::print(oop throwable, outputStream* st) {
1271 ResourceMark rm;
1272 Klass* k = throwable->klass();
1273 assert(k != NULL, "just checking");
1274 st->print("%s", InstanceKlass::cast(k)->external_name());
1275 oop msg = message(throwable);
1276 if (msg != NULL) {
1277 st->print(": %s", java_lang_String::as_utf8_string(msg));
1278 }
1279 }
1280
1281
1282 void java_lang_Throwable::print(Handle throwable, outputStream* st) {
1283 ResourceMark rm;
1284 Klass* k = throwable->klass();
1285 assert(k != NULL, "just checking");
1286 st->print("%s", InstanceKlass::cast(k)->external_name());
1287 oop msg = message(throwable);
1288 if (msg != NULL) {
1289 st->print(": %s", java_lang_String::as_utf8_string(msg));
1290 }
1291 }
1292
1293 // After this many redefines, the stack trace is unreliable.
1294 const int MAX_VERSION = USHRT_MAX;
1295
1296 // Helper backtrace functions to store bci|version together.
1297 static inline int merge_bci_and_version(int bci, int version) {
1298 // only store u2 for version, checking for overflow.
1299 if (version > USHRT_MAX || version < 0) version = MAX_VERSION;
1300 assert((jushort)bci == bci, "bci should be short");
1301 return build_int_from_shorts(version, bci);
1302 }
1303
1304 static inline int bci_at(unsigned int merged) {
1305 return extract_high_short_from_int(merged);
1306 }
1307 static inline int version_at(unsigned int merged) {
1308 return extract_low_short_from_int(merged);
1309 }
1310
1311 static inline bool version_matches(Method* method, int version) {
1312 return (method->constants()->version() == version && version < MAX_VERSION);
1313 }
1314
1315 static inline int get_line_number(Method* method, int bci) {
1316 int line_number = 0;
1317 if (method->is_native()) {
1318 // Negative value different from -1 below, enabling Java code in
1319 // class java.lang.StackTraceElement to distinguish "native" from
1320 // "no LineNumberTable". JDK tests for -2.
1321 line_number = -2;
1322 } else {
1323 // Returns -1 if no LineNumberTable, and otherwise actual line number
1324 line_number = method->line_number_from_bci(bci);
1325 if (line_number == -1 && ShowHiddenFrames) {
1326 line_number = bci + 1000000;
1327 }
1328 }
1329 return line_number;
1330 }
1331
1332 // This class provides a simple wrapper over the internal structure of
1333 // exception backtrace to insulate users of the backtrace from needing
1334 // to know what it looks like.
1335 class BacktraceBuilder: public StackObj {
1336 private:
1337 Handle _backtrace;
1338 objArrayOop _head;
1339 typeArrayOop _methods;
1340 typeArrayOop _bcis;
1341 objArrayOop _mirrors;
1342 int _index;
1343 No_Safepoint_Verifier _nsv;
1344
1345 public:
1346
1347 enum {
1348 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
1349 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
1350 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
1351 trace_next_offset = java_lang_Throwable::trace_next_offset,
1352 trace_size = java_lang_Throwable::trace_size,
1353 trace_chunk_size = java_lang_Throwable::trace_chunk_size
1354 };
1355
1356 // get info out of chunks
1357 static typeArrayOop get_methods(objArrayHandle chunk) {
1358 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
1359 assert(methods != NULL, "method array should be initialized in backtrace");
1360 return methods;
1361 }
1362 static typeArrayOop get_bcis(objArrayHandle chunk) {
1363 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1364 assert(bcis != NULL, "bci array should be initialized in backtrace");
1365 return bcis;
1366 }
1367 static objArrayOop get_mirrors(objArrayHandle chunk) {
1368 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
1369 assert(mirrors != NULL, "mirror array should be initialized in backtrace");
1370 return mirrors;
1371 }
1372
1373 // constructor for new backtrace
1374 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _mirrors(NULL) {
1375 expand(CHECK);
1376 _backtrace = _head;
1377 _index = 0;
1378 }
1379
1380 BacktraceBuilder(objArrayHandle backtrace) {
1381 _methods = get_methods(backtrace);
1382 _bcis = get_bcis(backtrace);
1383 _mirrors = get_mirrors(backtrace);
1384 assert(_methods->length() == _bcis->length() &&
1385 _methods->length() == _mirrors->length(),
1386 "method and source information arrays should match");
1387
1388 // head is the preallocated backtrace
1389 _backtrace = _head = backtrace();
1390 _index = 0;
1391 }
1392
1393 void expand(TRAPS) {
1394 objArrayHandle old_head(THREAD, _head);
1395 Pause_No_Safepoint_Verifier pnsv(&_nsv);
1396
1397 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
1398 objArrayHandle new_head(THREAD, head);
1399
1400 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1401 typeArrayHandle new_methods(THREAD, methods);
1402
1403 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
1404 typeArrayHandle new_bcis(THREAD, bcis);
1405
1406 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
1407 objArrayHandle new_mirrors(THREAD, mirrors);
1408
1409 if (!old_head.is_null()) {
1410 old_head->obj_at_put(trace_next_offset, new_head());
1411 }
1412 new_head->obj_at_put(trace_methods_offset, new_methods());
1413 new_head->obj_at_put(trace_bcis_offset, new_bcis());
1414 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
1415
1416 _head = new_head();
1417 _methods = new_methods();
1418 _bcis = new_bcis();
1419 _mirrors = new_mirrors();
1420 _index = 0;
1421 }
1422
1423 oop backtrace() {
1424 return _backtrace();
1425 }
1426
1427 inline void push(Method* method, int bci, TRAPS) {
1428 // Smear the -1 bci to 0 since the array only holds unsigned
1429 // shorts. The later line number lookup would just smear the -1
1430 // to a 0 even if it could be recorded.
1431 if (bci == SynchronizationEntryBCI) bci = 0;
1432
1433 if (_index >= trace_chunk_size) {
1434 methodHandle mhandle(THREAD, method);
1435 expand(CHECK);
1436 method = mhandle();
1437 }
1438
1439 _methods->short_at_put(_index, method->method_idnum());
1440 _bcis->int_at_put(_index, merge_bci_and_version(bci, method->constants()->version()));
1441
1442 // We need to save the mirrors in the backtrace to keep the class
1443 // from being unloaded while we still have this stack trace.
1444 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror");
1445 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
1446 _index++;
1447 }
1448
1449 };
1450
1451 // Print stack trace element to resource allocated buffer
1452 char* java_lang_Throwable::print_stack_element_to_buffer(Handle mirror,
1453 int method_id, int version, int bci) {
1454
1455 // Get strings and string lengths
1456 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
1457 const char* klass_name = holder->external_name();
1458 int buf_len = (int)strlen(klass_name);
1459
1460 // The method id may point to an obsolete method, can't get more stack information
1461 Method* method = holder->method_with_idnum(method_id);
1462 if (method == NULL) {
1463 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
1464 // This is what the java code prints in this case - added Redefined
1465 sprintf(buf, "\tat %s.null (Redefined)", klass_name);
1466 return buf;
1467 }
1468
1469 char* method_name = method->name()->as_C_string();
1470 buf_len += (int)strlen(method_name);
1471
1472 char* source_file_name = NULL;
1473 if (version_matches(method, version)) {
1474 Symbol* source = holder->source_file_name();
1475 if (source != NULL) {
1476 source_file_name = source->as_C_string();
1477 buf_len += (int)strlen(source_file_name);
1478 }
1479 }
1480
1481 // Allocate temporary buffer with extra space for formatting and line number
1482 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
1483
1484 // Print stack trace line in buffer
1485 sprintf(buf, "\tat %s.%s", klass_name, method_name);
1486
1487 if (!version_matches(method, version)) {
1488 strcat(buf, "(Redefined)");
1489 } else {
1490 int line_number = get_line_number(method, bci);
1491 if (line_number == -2) {
1492 strcat(buf, "(Native Method)");
1493 } else {
1494 if (source_file_name != NULL && (line_number != -1)) {
1495 // Sourcename and linenumber
1496 sprintf(buf + (int)strlen(buf), "(%s:%d)", source_file_name, line_number);
1497 } else if (source_file_name != NULL) {
1498 // Just sourcename
1499 sprintf(buf + (int)strlen(buf), "(%s)", source_file_name);
1500 } else {
1501 // Neither sourcename nor linenumber
1502 sprintf(buf + (int)strlen(buf), "(Unknown Source)");
1503 }
1504 nmethod* nm = method->code();
1505 if (WizardMode && nm != NULL) {
1506 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
1507 }
1508 }
1509 }
1510
1511 return buf;
1512 }
1513
1514 void java_lang_Throwable::print_stack_element(outputStream *st, Handle mirror,
1515 int method_id, int version, int bci) {
1516 ResourceMark rm;
1517 char* buf = print_stack_element_to_buffer(mirror, method_id, version, bci);
1518 st->print_cr("%s", buf);
1519 }
1520
1521 void java_lang_Throwable::print_stack_element(outputStream *st, methodHandle method, int bci) {
1522 Handle mirror = method->method_holder()->java_mirror();
1523 int method_id = method->method_idnum();
1524 int version = method->constants()->version();
1525 print_stack_element(st, mirror, method_id, version, bci);
1526 }
1527
1528 const char* java_lang_Throwable::no_stack_trace_message() {
1529 return "\t<<no stack trace available>>";
1530 }
1531
1532
1533 // Currently used only for exceptions occurring during startup
1534 void java_lang_Throwable::print_stack_trace(oop throwable, outputStream* st) {
1535 Thread *THREAD = Thread::current();
1536 Handle h_throwable(THREAD, throwable);
1537 while (h_throwable.not_null()) {
1538 objArrayHandle result (THREAD, objArrayOop(backtrace(h_throwable())));
1539 if (result.is_null()) {
1540 st->print_cr("%s", no_stack_trace_message());
1541 return;
1542 }
1543
1544 while (result.not_null()) {
1545
1546 // Get method id, bci, version and mirror from chunk
1547 typeArrayHandle methods (THREAD, BacktraceBuilder::get_methods(result));
1548 typeArrayHandle bcis (THREAD, BacktraceBuilder::get_bcis(result));
1549 objArrayHandle mirrors (THREAD, BacktraceBuilder::get_mirrors(result));
1550
1551 int length = methods()->length();
1552 for (int index = 0; index < length; index++) {
1553 Handle mirror(THREAD, mirrors->obj_at(index));
1554 // NULL mirror means end of stack trace
1555 if (mirror.is_null()) goto handle_cause;
1556 int method = methods->short_at(index);
1557 int version = version_at(bcis->int_at(index));
1558 int bci = bci_at(bcis->int_at(index));
1559 print_stack_element(st, mirror, method, version, bci);
1560 }
1561 result = objArrayHandle(THREAD, objArrayOop(result->obj_at(trace_next_offset)));
1562 }
1563 handle_cause:
1564 {
1565 EXCEPTION_MARK;
1566 JavaValue cause(T_OBJECT);
1567 JavaCalls::call_virtual(&cause,
1568 h_throwable,
1569 KlassHandle(THREAD, h_throwable->klass()),
1570 vmSymbols::getCause_name(),
1571 vmSymbols::void_throwable_signature(),
1572 THREAD);
1573 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
1574 if (HAS_PENDING_EXCEPTION) {
1575 CLEAR_PENDING_EXCEPTION;
1576 h_throwable = Handle();
1577 } else {
1578 h_throwable = Handle(THREAD, (oop) cause.get_jobject());
1579 if (h_throwable.not_null()) {
1580 st->print("Caused by: ");
1581 print(h_throwable, st);
1582 st->cr();
1583 }
1584 }
1585 }
1586 }
1587 }
1588
1589 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method, TRAPS) {
1590 if (!StackTraceInThrowable) return;
1591 ResourceMark rm(THREAD);
1592
1593 // Start out by clearing the backtrace for this object, in case the VM
1594 // runs out of memory while allocating the stack trace
1595 set_backtrace(throwable(), NULL);
1596 // Clear lazily constructed Java level stacktrace if refilling occurs
1597 // This is unnecessary in 1.7+ but harmless
1598 clear_stacktrace(throwable());
1599
1600 int max_depth = MaxJavaStackTraceDepth;
1601 JavaThread* thread = (JavaThread*)THREAD;
1602 BacktraceBuilder bt(CHECK);
1603
1604 // If there is no Java frame just return the method that was being called
1605 // with bci 0
1606 if (!thread->has_last_Java_frame()) {
1607 if (max_depth >= 1 && method() != NULL) {
1608 bt.push(method(), 0, CHECK);
1609 set_backtrace(throwable(), bt.backtrace());
1610 }
1611 return;
1612 }
1613
1614 // Instead of using vframe directly, this version of fill_in_stack_trace
1615 // basically handles everything by hand. This significantly improved the
1616 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
1617 // See bug 6333838 for more details.
1618 // The "ASSERT" here is to verify this method generates the exactly same stack
1619 // trace as utilizing vframe.
1620 #ifdef ASSERT
1621 vframeStream st(thread);
1622 methodHandle st_method(THREAD, st.method());
1623 #endif
1624 int total_count = 0;
1625 RegisterMap map(thread, false);
1626 int decode_offset = 0;
1627 nmethod* nm = NULL;
1628 bool skip_fillInStackTrace_check = false;
1629 bool skip_throwableInit_check = false;
1630 bool skip_hidden = !ShowHiddenFrames;
1631
1632 for (frame fr = thread->last_frame(); max_depth != total_count;) {
1633 Method* method = NULL;
1634 int bci = 0;
1635
1636 // Compiled java method case.
1637 if (decode_offset != 0) {
1638 DebugInfoReadStream stream(nm, decode_offset);
1639 decode_offset = stream.read_int();
1640 method = (Method*)nm->metadata_at(stream.read_int());
1641 bci = stream.read_bci();
1642 } else {
1643 if (fr.is_first_frame()) break;
1644 address pc = fr.pc();
1645 if (fr.is_interpreted_frame()) {
1646 address bcp = fr.interpreter_frame_bcp();
1647 method = fr.interpreter_frame_method();
1648 bci = method->bci_from(bcp);
1649 fr = fr.sender(&map);
1650 } else {
1651 CodeBlob* cb = fr.cb();
1652 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
1653 // but non nmethod
1654 fr = fr.sender(&map);
1655 if (cb == NULL || !cb->is_nmethod()) {
1656 continue;
1657 }
1658 nm = (nmethod*)cb;
1659 if (nm->method()->is_native()) {
1660 method = nm->method();
1661 bci = 0;
1662 } else {
1663 PcDesc* pd = nm->pc_desc_at(pc);
1664 decode_offset = pd->scope_decode_offset();
1665 // if decode_offset is not equal to 0, it will execute the
1666 // "compiled java method case" at the beginning of the loop.
1667 continue;
1668 }
1669 }
1670 }
1671 #ifdef ASSERT
1672 assert(st_method() == method && st.bci() == bci,
1673 "Wrong stack trace");
1674 st.next();
1675 // vframeStream::method isn't GC-safe so store off a copy
1676 // of the Method* in case we GC.
1677 if (!st.at_end()) {
1678 st_method = st.method();
1679 }
1680 #endif
1681
1682 // the format of the stacktrace will be:
1683 // - 1 or more fillInStackTrace frames for the exception class (skipped)
1684 // - 0 or more <init> methods for the exception class (skipped)
1685 // - rest of the stack
1686
1687 if (!skip_fillInStackTrace_check) {
1688 if ((method->name() == vmSymbols::fillInStackTrace_name() ||
1689 method->name() == vmSymbols::fillInStackTrace0_name()) &&
1690 throwable->is_a(method->method_holder())) {
1691 continue;
1692 }
1693 else {
1694 skip_fillInStackTrace_check = true; // gone past them all
1695 }
1696 }
1697 if (!skip_throwableInit_check) {
1698 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
1699
1700 // skip <init> methods of the exception class and superclasses
1701 // This is simlar to classic VM.
1702 if (method->name() == vmSymbols::object_initializer_name() &&
1703 throwable->is_a(method->method_holder())) {
1704 continue;
1705 } else {
1706 // there are none or we've seen them all - either way stop checking
1707 skip_throwableInit_check = true;
1708 }
1709 }
1710 if (method->is_hidden()) {
1711 if (skip_hidden) continue;
1712 }
1713 bt.push(method, bci, CHECK);
1714 total_count++;
1715 }
1716
1717 // Put completed stack trace into throwable object
1718 set_backtrace(throwable(), bt.backtrace());
1719 }
1720
1721 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method) {
1722 // No-op if stack trace is disabled
1723 if (!StackTraceInThrowable) {
1724 return;
1725 }
1726
1727 // Disable stack traces for some preallocated out of memory errors
1728 if (!Universe::should_fill_in_stack_trace(throwable)) {
1729 return;
1730 }
1731
1732 PRESERVE_EXCEPTION_MARK;
1733
1734 JavaThread* thread = JavaThread::active();
1735 fill_in_stack_trace(throwable, method, thread);
1736 // ignore exceptions thrown during stack trace filling
1737 CLEAR_PENDING_EXCEPTION;
1738 }
1739
1740 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
1741 // Allocate stack trace - backtrace is created but not filled in
1742
1743 // No-op if stack trace is disabled
1744 if (!StackTraceInThrowable) return;
1745 BacktraceBuilder bt(CHECK); // creates a backtrace
1746 set_backtrace(throwable(), bt.backtrace());
1747 }
1748
1749
1750 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
1751 // Fill in stack trace into preallocated backtrace (no GC)
1752
1753 // No-op if stack trace is disabled
1754 if (!StackTraceInThrowable) return;
1755
1756 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
1757
1758 JavaThread* THREAD = JavaThread::current();
1759
1760 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
1761 assert(backtrace.not_null(), "backtrace should have been preallocated");
1762
1763 ResourceMark rm(THREAD);
1764 vframeStream st(THREAD);
1765
1766 BacktraceBuilder bt(backtrace);
1767
1768 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
1769 // methods as preallocated errors aren't created by "java" code.
1770
1771 // fill in as much stack trace as possible
1772 typeArrayOop methods = BacktraceBuilder::get_methods(backtrace);
1773 int max_chunks = MIN2(methods->length(), (int)MaxJavaStackTraceDepth);
1774 int chunk_count = 0;
1775
1776 for (;!st.at_end(); st.next()) {
1777 bt.push(st.method(), st.bci(), CHECK);
1778 chunk_count++;
1779
1780 // Bail-out for deep stacks
1781 if (chunk_count >= max_chunks) break;
1782 }
1783
1784 // We support the Throwable immutability protocol defined for Java 7.
1785 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
1786 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized");
1787 }
1788
1789
1790 int java_lang_Throwable::get_stack_trace_depth(oop throwable, TRAPS) {
1791 if (throwable == NULL) {
1792 THROW_0(vmSymbols::java_lang_NullPointerException());
1793 }
1794 objArrayOop chunk = objArrayOop(backtrace(throwable));
1795 int depth = 0;
1796 if (chunk != NULL) {
1797 // Iterate over chunks and count full ones
1798 while (true) {
1799 objArrayOop next = objArrayOop(chunk->obj_at(trace_next_offset));
1800 if (next == NULL) break;
1801 depth += trace_chunk_size;
1802 chunk = next;
1803 }
1804 assert(chunk != NULL && chunk->obj_at(trace_next_offset) == NULL, "sanity check");
1805 // Count element in remaining partial chunk. NULL value for mirror
1806 // marks the end of the stack trace elements that are saved.
1807 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk);
1808 assert(mirrors != NULL, "sanity check");
1809 for (int i = 0; i < mirrors->length(); i++) {
1810 if (mirrors->obj_at(i) == NULL) break;
1811 depth++;
1812 }
1813 }
1814 return depth;
1815 }
1816
1817
1818 oop java_lang_Throwable::get_stack_trace_element(oop throwable, int index, TRAPS) {
1819 if (throwable == NULL) {
1820 THROW_0(vmSymbols::java_lang_NullPointerException());
1821 }
1822 if (index < 0) {
1823 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1824 }
1825 // Compute how many chunks to skip and index into actual chunk
1826 objArrayOop chunk = objArrayOop(backtrace(throwable));
1827 int skip_chunks = index / trace_chunk_size;
1828 int chunk_index = index % trace_chunk_size;
1829 while (chunk != NULL && skip_chunks > 0) {
1830 chunk = objArrayOop(chunk->obj_at(trace_next_offset));
1831 skip_chunks--;
1832 }
1833 if (chunk == NULL) {
1834 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1835 }
1836 // Get method id, bci, version and mirror from chunk
1837 typeArrayOop methods = BacktraceBuilder::get_methods(chunk);
1838 typeArrayOop bcis = BacktraceBuilder::get_bcis(chunk);
1839 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk);
1840
1841 assert(methods != NULL && bcis != NULL && mirrors != NULL, "sanity check");
1842
1843 int method = methods->short_at(chunk_index);
1844 int version = version_at(bcis->int_at(chunk_index));
1845 int bci = bci_at(bcis->int_at(chunk_index));
1846 Handle mirror(THREAD, mirrors->obj_at(chunk_index));
1847
1848 // Chunk can be partial full
1849 if (mirror.is_null()) {
1850 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1851 }
1852
1853 oop element = java_lang_StackTraceElement::create(mirror, method, version, bci, CHECK_0);
1854 return element;
1855 }
1856
1857 oop java_lang_StackTraceElement::create(Handle mirror, int method_id,
1858 int version, int bci, TRAPS) {
1859 // Allocate java.lang.StackTraceElement instance
1860 Klass* k = SystemDictionary::StackTraceElement_klass();
1861 assert(k != NULL, "must be loaded in 1.4+");
1862 instanceKlassHandle ik (THREAD, k);
1863 if (ik->should_be_initialized()) {
1864 ik->initialize(CHECK_0);
1865 }
1866
1867 Handle element = ik->allocate_instance_handle(CHECK_0);
1868 // Fill in class name
1869 ResourceMark rm(THREAD);
1870 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
1871 const char* str = holder->external_name();
1872 oop classname = StringTable::intern((char*) str, CHECK_0);
1873 java_lang_StackTraceElement::set_declaringClass(element(), classname);
1874
1875 Method* method = holder->method_with_idnum(method_id);
1876 // Method on stack may be obsolete because it was redefined so cannot be
1877 // found by idnum.
1878 if (method == NULL) {
1879 // leave name and fileName null
1880 java_lang_StackTraceElement::set_lineNumber(element(), -1);
1881 return element();
1882 }
1883
1884 // Fill in method name
1885 oop methodname = StringTable::intern(method->name(), CHECK_0);
1886 java_lang_StackTraceElement::set_methodName(element(), methodname);
1887
1888 if (!version_matches(method, version)) {
1889 // The method was redefined, accurate line number information isn't available
1890 java_lang_StackTraceElement::set_fileName(element(), NULL);
1891 java_lang_StackTraceElement::set_lineNumber(element(), -1);
1892 } else {
1893 // Fill in source file name and line number.
1894 Symbol* source = holder->source_file_name();
1895 if (ShowHiddenFrames && source == NULL)
1896 source = vmSymbols::unknown_class_name();
1897 oop filename = StringTable::intern(source, CHECK_0);
1898 java_lang_StackTraceElement::set_fileName(element(), filename);
1899
1900 int line_number = get_line_number(method, bci);
1901 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
1902 }
1903 return element();
1904 }
1905
1906 oop java_lang_StackTraceElement::create(methodHandle method, int bci, TRAPS) {
1907 Handle mirror (THREAD, method->method_holder()->java_mirror());
1908 int method_id = method->method_idnum();
1909 return create(mirror, method_id, method->constants()->version(), bci, THREAD);
1910 }
1911
1912 void java_lang_reflect_AccessibleObject::compute_offsets() {
1913 Klass* k = SystemDictionary::reflect_AccessibleObject_klass();
1914 compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature());
1915 }
1916
1917 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
1918 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1919 return (jboolean) reflect->bool_field(override_offset);
1920 }
1921
1922 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
1923 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1924 reflect->bool_field_put(override_offset, (int) value);
1925 }
1926
1927 void java_lang_reflect_Method::compute_offsets() {
1928 Klass* k = SystemDictionary::reflect_Method_klass();
1929 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
1930 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1931 compute_offset(returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature());
1932 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
1933 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
1934 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
1935 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
1936 // The generic signature and annotations fields are only present in 1.5
1937 signature_offset = -1;
1938 annotations_offset = -1;
1939 parameter_annotations_offset = -1;
1940 annotation_default_offset = -1;
1941 type_annotations_offset = -1;
1942 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
1943 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
1944 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
1945 compute_optional_offset(annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature());
1946 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
1947 }
1948
1949 Handle java_lang_reflect_Method::create(TRAPS) {
1950 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1951 Klass* klass = SystemDictionary::reflect_Method_klass();
1952 // This class is eagerly initialized during VM initialization, since we keep a refence
1953 // to one of the methods
1954 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
1955 return InstanceKlass::cast(klass)->allocate_instance_handle(CHECK_NH);
1956 }
1957
1958 oop java_lang_reflect_Method::clazz(oop reflect) {
1959 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1960 return reflect->obj_field(clazz_offset);
1961 }
1962
1963 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
1964 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1965 reflect->obj_field_put(clazz_offset, value);
1966 }
1967
1968 int java_lang_reflect_Method::slot(oop reflect) {
1969 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1970 return reflect->int_field(slot_offset);
1971 }
1972
1973 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
1974 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1975 reflect->int_field_put(slot_offset, value);
1976 }
1977
1978 oop java_lang_reflect_Method::name(oop method) {
1979 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1980 return method->obj_field(name_offset);
1981 }
1982
1983 void java_lang_reflect_Method::set_name(oop method, oop value) {
1984 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1985 method->obj_field_put(name_offset, value);
1986 }
1987
1988 oop java_lang_reflect_Method::return_type(oop method) {
1989 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1990 return method->obj_field(returnType_offset);
1991 }
1992
1993 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
1994 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1995 method->obj_field_put(returnType_offset, value);
1996 }
1997
1998 oop java_lang_reflect_Method::parameter_types(oop method) {
1999 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2000 return method->obj_field(parameterTypes_offset);
2001 }
2002
2003 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
2004 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2005 method->obj_field_put(parameterTypes_offset, value);
2006 }
2007
2008 oop java_lang_reflect_Method::exception_types(oop method) {
2009 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2010 return method->obj_field(exceptionTypes_offset);
2011 }
2012
2013 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
2014 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2015 method->obj_field_put(exceptionTypes_offset, value);
2016 }
2017
2018 int java_lang_reflect_Method::modifiers(oop method) {
2019 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2020 return method->int_field(modifiers_offset);
2021 }
2022
2023 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
2024 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2025 method->int_field_put(modifiers_offset, value);
2026 }
2027
2028 bool java_lang_reflect_Method::has_signature_field() {
2029 return (signature_offset >= 0);
2030 }
2031
2032 oop java_lang_reflect_Method::signature(oop method) {
2033 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2034 assert(has_signature_field(), "signature field must be present");
2035 return method->obj_field(signature_offset);
2036 }
2037
2038 void java_lang_reflect_Method::set_signature(oop method, oop value) {
2039 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2040 assert(has_signature_field(), "signature field must be present");
2041 method->obj_field_put(signature_offset, value);
2042 }
2043
2044 bool java_lang_reflect_Method::has_annotations_field() {
2045 return (annotations_offset >= 0);
2046 }
2047
2048 oop java_lang_reflect_Method::annotations(oop method) {
2049 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2050 assert(has_annotations_field(), "annotations field must be present");
2051 return method->obj_field(annotations_offset);
2052 }
2053
2054 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
2055 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2056 assert(has_annotations_field(), "annotations field must be present");
2057 method->obj_field_put(annotations_offset, value);
2058 }
2059
2060 bool java_lang_reflect_Method::has_parameter_annotations_field() {
2061 return (parameter_annotations_offset >= 0);
2062 }
2063
2064 oop java_lang_reflect_Method::parameter_annotations(oop method) {
2065 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2066 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2067 return method->obj_field(parameter_annotations_offset);
2068 }
2069
2070 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
2071 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2072 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2073 method->obj_field_put(parameter_annotations_offset, value);
2074 }
2075
2076 bool java_lang_reflect_Method::has_annotation_default_field() {
2077 return (annotation_default_offset >= 0);
2078 }
2079
2080 oop java_lang_reflect_Method::annotation_default(oop method) {
2081 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2082 assert(has_annotation_default_field(), "annotation default field must be present");
2083 return method->obj_field(annotation_default_offset);
2084 }
2085
2086 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
2087 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2088 assert(has_annotation_default_field(), "annotation default field must be present");
2089 method->obj_field_put(annotation_default_offset, value);
2090 }
2091
2092 bool java_lang_reflect_Method::has_type_annotations_field() {
2093 return (type_annotations_offset >= 0);
2094 }
2095
2096 oop java_lang_reflect_Method::type_annotations(oop method) {
2097 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2098 assert(has_type_annotations_field(), "type_annotations field must be present");
2099 return method->obj_field(type_annotations_offset);
2100 }
2101
2102 void java_lang_reflect_Method::set_type_annotations(oop method, oop value) {
2103 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2104 assert(has_type_annotations_field(), "type_annotations field must be present");
2105 method->obj_field_put(type_annotations_offset, value);
2106 }
2107
2108 void java_lang_reflect_Constructor::compute_offsets() {
2109 Klass* k = SystemDictionary::reflect_Constructor_klass();
2110 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
2111 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
2112 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
2113 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
2114 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2115 // The generic signature and annotations fields are only present in 1.5
2116 signature_offset = -1;
2117 annotations_offset = -1;
2118 parameter_annotations_offset = -1;
2119 type_annotations_offset = -1;
2120 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
2121 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
2122 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
2123 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
2124 }
2125
2126 Handle java_lang_reflect_Constructor::create(TRAPS) {
2127 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2128 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
2129 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2130 instanceKlassHandle klass (THREAD, k);
2131 // Ensure it is initialized
2132 klass->initialize(CHECK_NH);
2133 return klass->allocate_instance_handle(CHECK_NH);
2134 }
2135
2136 oop java_lang_reflect_Constructor::clazz(oop reflect) {
2137 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2138 return reflect->obj_field(clazz_offset);
2139 }
2140
2141 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
2142 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2143 reflect->obj_field_put(clazz_offset, value);
2144 }
2145
2146 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
2147 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2148 return constructor->obj_field(parameterTypes_offset);
2149 }
2150
2151 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
2152 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2153 constructor->obj_field_put(parameterTypes_offset, value);
2154 }
2155
2156 oop java_lang_reflect_Constructor::exception_types(oop constructor) {
2157 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2158 return constructor->obj_field(exceptionTypes_offset);
2159 }
2160
2161 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
2162 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2163 constructor->obj_field_put(exceptionTypes_offset, value);
2164 }
2165
2166 int java_lang_reflect_Constructor::slot(oop reflect) {
2167 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2168 return reflect->int_field(slot_offset);
2169 }
2170
2171 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
2172 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2173 reflect->int_field_put(slot_offset, value);
2174 }
2175
2176 int java_lang_reflect_Constructor::modifiers(oop constructor) {
2177 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2178 return constructor->int_field(modifiers_offset);
2179 }
2180
2181 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
2182 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2183 constructor->int_field_put(modifiers_offset, value);
2184 }
2185
2186 bool java_lang_reflect_Constructor::has_signature_field() {
2187 return (signature_offset >= 0);
2188 }
2189
2190 oop java_lang_reflect_Constructor::signature(oop constructor) {
2191 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2192 assert(has_signature_field(), "signature field must be present");
2193 return constructor->obj_field(signature_offset);
2194 }
2195
2196 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
2197 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2198 assert(has_signature_field(), "signature field must be present");
2199 constructor->obj_field_put(signature_offset, value);
2200 }
2201
2202 bool java_lang_reflect_Constructor::has_annotations_field() {
2203 return (annotations_offset >= 0);
2204 }
2205
2206 oop java_lang_reflect_Constructor::annotations(oop constructor) {
2207 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2208 assert(has_annotations_field(), "annotations field must be present");
2209 return constructor->obj_field(annotations_offset);
2210 }
2211
2212 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
2213 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2214 assert(has_annotations_field(), "annotations field must be present");
2215 constructor->obj_field_put(annotations_offset, value);
2216 }
2217
2218 bool java_lang_reflect_Constructor::has_parameter_annotations_field() {
2219 return (parameter_annotations_offset >= 0);
2220 }
2221
2222 oop java_lang_reflect_Constructor::parameter_annotations(oop method) {
2223 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2224 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2225 return method->obj_field(parameter_annotations_offset);
2226 }
2227
2228 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
2229 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2230 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2231 method->obj_field_put(parameter_annotations_offset, value);
2232 }
2233
2234 bool java_lang_reflect_Constructor::has_type_annotations_field() {
2235 return (type_annotations_offset >= 0);
2236 }
2237
2238 oop java_lang_reflect_Constructor::type_annotations(oop constructor) {
2239 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2240 assert(has_type_annotations_field(), "type_annotations field must be present");
2241 return constructor->obj_field(type_annotations_offset);
2242 }
2243
2244 void java_lang_reflect_Constructor::set_type_annotations(oop constructor, oop value) {
2245 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2246 assert(has_type_annotations_field(), "type_annotations field must be present");
2247 constructor->obj_field_put(type_annotations_offset, value);
2248 }
2249
2250 void java_lang_reflect_Field::compute_offsets() {
2251 Klass* k = SystemDictionary::reflect_Field_klass();
2252 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
2253 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2254 compute_offset(type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature());
2255 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
2256 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2257 // The generic signature and annotations fields are only present in 1.5
2258 signature_offset = -1;
2259 annotations_offset = -1;
2260 type_annotations_offset = -1;
2261 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
2262 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
2263 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
2264 }
2265
2266 Handle java_lang_reflect_Field::create(TRAPS) {
2267 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2268 Symbol* name = vmSymbols::java_lang_reflect_Field();
2269 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2270 instanceKlassHandle klass (THREAD, k);
2271 // Ensure it is initialized
2272 klass->initialize(CHECK_NH);
2273 return klass->allocate_instance_handle(CHECK_NH);
2274 }
2275
2276 oop java_lang_reflect_Field::clazz(oop reflect) {
2277 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2278 return reflect->obj_field(clazz_offset);
2279 }
2280
2281 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
2282 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2283 reflect->obj_field_put(clazz_offset, value);
2284 }
2285
2286 oop java_lang_reflect_Field::name(oop field) {
2287 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2288 return field->obj_field(name_offset);
2289 }
2290
2291 void java_lang_reflect_Field::set_name(oop field, oop value) {
2292 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2293 field->obj_field_put(name_offset, value);
2294 }
2295
2296 oop java_lang_reflect_Field::type(oop field) {
2297 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2298 return field->obj_field(type_offset);
2299 }
2300
2301 void java_lang_reflect_Field::set_type(oop field, oop value) {
2302 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2303 field->obj_field_put(type_offset, value);
2304 }
2305
2306 int java_lang_reflect_Field::slot(oop reflect) {
2307 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2308 return reflect->int_field(slot_offset);
2309 }
2310
2311 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
2312 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2313 reflect->int_field_put(slot_offset, value);
2314 }
2315
2316 int java_lang_reflect_Field::modifiers(oop field) {
2317 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2318 return field->int_field(modifiers_offset);
2319 }
2320
2321 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
2322 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2323 field->int_field_put(modifiers_offset, value);
2324 }
2325
2326 bool java_lang_reflect_Field::has_signature_field() {
2327 return (signature_offset >= 0);
2328 }
2329
2330 oop java_lang_reflect_Field::signature(oop field) {
2331 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2332 assert(has_signature_field(), "signature field must be present");
2333 return field->obj_field(signature_offset);
2334 }
2335
2336 void java_lang_reflect_Field::set_signature(oop field, oop value) {
2337 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2338 assert(has_signature_field(), "signature field must be present");
2339 field->obj_field_put(signature_offset, value);
2340 }
2341
2342 bool java_lang_reflect_Field::has_annotations_field() {
2343 return (annotations_offset >= 0);
2344 }
2345
2346 oop java_lang_reflect_Field::annotations(oop field) {
2347 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2348 assert(has_annotations_field(), "annotations field must be present");
2349 return field->obj_field(annotations_offset);
2350 }
2351
2352 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
2353 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2354 assert(has_annotations_field(), "annotations field must be present");
2355 field->obj_field_put(annotations_offset, value);
2356 }
2357
2358 bool java_lang_reflect_Field::has_type_annotations_field() {
2359 return (type_annotations_offset >= 0);
2360 }
2361
2362 oop java_lang_reflect_Field::type_annotations(oop field) {
2363 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2364 assert(has_type_annotations_field(), "type_annotations field must be present");
2365 return field->obj_field(type_annotations_offset);
2366 }
2367
2368 void java_lang_reflect_Field::set_type_annotations(oop field, oop value) {
2369 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2370 assert(has_type_annotations_field(), "type_annotations field must be present");
2371 field->obj_field_put(type_annotations_offset, value);
2372 }
2373
2374 void sun_reflect_ConstantPool::compute_offsets() {
2375 Klass* k = SystemDictionary::reflect_ConstantPool_klass();
2376 // This null test can be removed post beta
2377 if (k != NULL) {
2378 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
2379 compute_offset(_oop_offset, k, vmSymbols::ConstantPool_name(), vmSymbols::object_signature());
2380 }
2381 }
2382
2383 void java_lang_reflect_Parameter::compute_offsets() {
2384 Klass* k = SystemDictionary::reflect_Parameter_klass();
2385 if(NULL != k) {
2386 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2387 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2388 compute_offset(index_offset, k, vmSymbols::index_name(), vmSymbols::int_signature());
2389 compute_offset(executable_offset, k, vmSymbols::executable_name(), vmSymbols::executable_signature());
2390 }
2391 }
2392
2393 Handle java_lang_reflect_Parameter::create(TRAPS) {
2394 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2395 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
2396 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2397 instanceKlassHandle klass (THREAD, k);
2398 // Ensure it is initialized
2399 klass->initialize(CHECK_NH);
2400 return klass->allocate_instance_handle(CHECK_NH);
2401 }
2402
2403 oop java_lang_reflect_Parameter::name(oop param) {
2404 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2405 return param->obj_field(name_offset);
2406 }
2407
2408 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
2409 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2410 param->obj_field_put(name_offset, value);
2411 }
2412
2413 int java_lang_reflect_Parameter::modifiers(oop param) {
2414 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2415 return param->int_field(modifiers_offset);
2416 }
2417
2418 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
2419 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2420 param->int_field_put(modifiers_offset, value);
2421 }
2422
2423 int java_lang_reflect_Parameter::index(oop param) {
2424 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2425 return param->int_field(index_offset);
2426 }
2427
2428 void java_lang_reflect_Parameter::set_index(oop param, int value) {
2429 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2430 param->int_field_put(index_offset, value);
2431 }
2432
2433 oop java_lang_reflect_Parameter::executable(oop param) {
2434 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2435 return param->obj_field(executable_offset);
2436 }
2437
2438 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
2439 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2440 param->obj_field_put(executable_offset, value);
2441 }
2442
2443
2444 Handle sun_reflect_ConstantPool::create(TRAPS) {
2445 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2446 Klass* k = SystemDictionary::reflect_ConstantPool_klass();
2447 instanceKlassHandle klass (THREAD, k);
2448 // Ensure it is initialized
2449 klass->initialize(CHECK_NH);
2450 return klass->allocate_instance_handle(CHECK_NH);
2451 }
2452
2453
2454 void sun_reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
2455 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2456 oop mirror = value->pool_holder()->java_mirror();
2457 // Save the mirror to get back the constant pool.
2458 reflect->obj_field_put(_oop_offset, mirror);
2459 }
2460
2461 ConstantPool* sun_reflect_ConstantPool::get_cp(oop reflect) {
2462 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2463
2464 oop mirror = reflect->obj_field(_oop_offset);
2465 Klass* k = java_lang_Class::as_Klass(mirror);
2466 assert(k->oop_is_instance(), "Must be");
2467
2468 // Get the constant pool back from the klass. Since class redefinition
2469 // merges the new constant pool into the old, this is essentially the
2470 // same constant pool as the original. If constant pool merging is
2471 // no longer done in the future, this will have to change to save
2472 // the original.
2473 return InstanceKlass::cast(k)->constants();
2474 }
2475
2476 void sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
2477 Klass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass();
2478 // This null test can be removed post beta
2479 if (k != NULL) {
2480 compute_offset(_base_offset, k,
2481 vmSymbols::base_name(), vmSymbols::object_signature());
2482 }
2483 }
2484
2485 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
2486 Klass* k = SystemDictionary::box_klass(type);
2487 if (k == NULL) return NULL;
2488 instanceKlassHandle h (THREAD, k);
2489 if (!h->is_initialized()) h->initialize(CHECK_0);
2490 return h->allocate_instance(THREAD);
2491 }
2492
2493
2494 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
2495 oop box = initialize_and_allocate(type, CHECK_0);
2496 if (box == NULL) return NULL;
2497 switch (type) {
2498 case T_BOOLEAN:
2499 box->bool_field_put(value_offset, value->z);
2500 break;
2501 case T_CHAR:
2502 box->char_field_put(value_offset, value->c);
2503 break;
2504 case T_FLOAT:
2505 box->float_field_put(value_offset, value->f);
2506 break;
2507 case T_DOUBLE:
2508 box->double_field_put(long_value_offset, value->d);
2509 break;
2510 case T_BYTE:
2511 box->byte_field_put(value_offset, value->b);
2512 break;
2513 case T_SHORT:
2514 box->short_field_put(value_offset, value->s);
2515 break;
2516 case T_INT:
2517 box->int_field_put(value_offset, value->i);
2518 break;
2519 case T_LONG:
2520 box->long_field_put(long_value_offset, value->j);
2521 break;
2522 default:
2523 return NULL;
2524 }
2525 return box;
2526 }
2527
2528
2529 BasicType java_lang_boxing_object::basic_type(oop box) {
2530 if (box == NULL) return T_ILLEGAL;
2531 BasicType type = SystemDictionary::box_klass_type(box->klass());
2532 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
2533 return T_ILLEGAL;
2534 return type;
2535 }
2536
2537
2538 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
2539 BasicType type = SystemDictionary::box_klass_type(box->klass());
2540 switch (type) {
2541 case T_BOOLEAN:
2542 value->z = box->bool_field(value_offset);
2543 break;
2544 case T_CHAR:
2545 value->c = box->char_field(value_offset);
2546 break;
2547 case T_FLOAT:
2548 value->f = box->float_field(value_offset);
2549 break;
2550 case T_DOUBLE:
2551 value->d = box->double_field(long_value_offset);
2552 break;
2553 case T_BYTE:
2554 value->b = box->byte_field(value_offset);
2555 break;
2556 case T_SHORT:
2557 value->s = box->short_field(value_offset);
2558 break;
2559 case T_INT:
2560 value->i = box->int_field(value_offset);
2561 break;
2562 case T_LONG:
2563 value->j = box->long_field(long_value_offset);
2564 break;
2565 default:
2566 return T_ILLEGAL;
2567 } // end switch
2568 return type;
2569 }
2570
2571
2572 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
2573 BasicType type = SystemDictionary::box_klass_type(box->klass());
2574 switch (type) {
2575 case T_BOOLEAN:
2576 box->bool_field_put(value_offset, value->z);
2577 break;
2578 case T_CHAR:
2579 box->char_field_put(value_offset, value->c);
2580 break;
2581 case T_FLOAT:
2582 box->float_field_put(value_offset, value->f);
2583 break;
2584 case T_DOUBLE:
2585 box->double_field_put(long_value_offset, value->d);
2586 break;
2587 case T_BYTE:
2588 box->byte_field_put(value_offset, value->b);
2589 break;
2590 case T_SHORT:
2591 box->short_field_put(value_offset, value->s);
2592 break;
2593 case T_INT:
2594 box->int_field_put(value_offset, value->i);
2595 break;
2596 case T_LONG:
2597 box->long_field_put(long_value_offset, value->j);
2598 break;
2599 default:
2600 return T_ILLEGAL;
2601 } // end switch
2602 return type;
2603 }
2604
2605
2606 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
2607 switch (type) {
2608 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
2609 case T_CHAR: st->print("%d", value->c); break;
2610 case T_BYTE: st->print("%d", value->b); break;
2611 case T_SHORT: st->print("%d", value->s); break;
2612 case T_INT: st->print("%d", value->i); break;
2613 case T_LONG: st->print(INT64_FORMAT, value->j); break;
2614 case T_FLOAT: st->print("%f", value->f); break;
2615 case T_DOUBLE: st->print("%lf", value->d); break;
2616 default: st->print("type %d?", type); break;
2617 }
2618 }
2619
2620
2621 // Support for java_lang_ref_Reference
2622 HeapWord *java_lang_ref_Reference::pending_list_lock_addr() {
2623 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2624 address addr = ik->static_field_addr(static_lock_offset);
2625 return (HeapWord*) addr;
2626 }
2627
2628 oop java_lang_ref_Reference::pending_list_lock() {
2629 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2630 address addr = ik->static_field_addr(static_lock_offset);
2631 if (UseCompressedOops) {
2632 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
2633 } else {
2634 return oopDesc::load_decode_heap_oop((oop*)addr);
2635 }
2636 }
2637
2638 HeapWord *java_lang_ref_Reference::pending_list_addr() {
2639 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2640 address addr = ik->static_field_addr(static_pending_offset);
2641 // XXX This might not be HeapWord aligned, almost rather be char *.
2642 return (HeapWord*)addr;
2643 }
2644
2645 oop java_lang_ref_Reference::pending_list() {
2646 char *addr = (char *)pending_list_addr();
2647 if (UseCompressedOops) {
2648 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
2649 } else {
2650 return oopDesc::load_decode_heap_oop((oop*)addr);
2651 }
2652 }
2653
2654
2655 // Support for java_lang_ref_SoftReference
2656
2657 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
2658 return ref->long_field(timestamp_offset);
2659 }
2660
2661 jlong java_lang_ref_SoftReference::clock() {
2662 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass());
2663 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
2664 return *offset;
2665 }
2666
2667 void java_lang_ref_SoftReference::set_clock(jlong value) {
2668 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass());
2669 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
2670 *offset = value;
2671 }
2672
2673 // Support for java_lang_invoke_DirectMethodHandle
2674
2675 int java_lang_invoke_DirectMethodHandle::_member_offset;
2676
2677 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
2678 oop member_name = NULL;
2679 bool is_dmh = dmh->is_oop() && java_lang_invoke_DirectMethodHandle::is_instance(dmh);
2680 assert(is_dmh, "a DirectMethodHandle oop is expected");
2681 if (is_dmh) {
2682 member_name = dmh->obj_field(member_offset_in_bytes());
2683 }
2684 return member_name;
2685 }
2686
2687 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
2688 Klass* klass_oop = SystemDictionary::DirectMethodHandle_klass();
2689 if (klass_oop != NULL) {
2690 compute_offset(_member_offset, klass_oop, vmSymbols::member_name(), vmSymbols::java_lang_invoke_MemberName_signature());
2691 }
2692 }
2693
2694 // Support for java_lang_invoke_MethodHandle
2695
2696 int java_lang_invoke_MethodHandle::_type_offset;
2697 int java_lang_invoke_MethodHandle::_form_offset;
2698
2699 int java_lang_invoke_MemberName::_clazz_offset;
2700 int java_lang_invoke_MemberName::_name_offset;
2701 int java_lang_invoke_MemberName::_type_offset;
2702 int java_lang_invoke_MemberName::_flags_offset;
2703 int java_lang_invoke_MemberName::_vmtarget_offset;
2704 int java_lang_invoke_MemberName::_vmloader_offset;
2705 int java_lang_invoke_MemberName::_vmindex_offset;
2706
2707 int java_lang_invoke_LambdaForm::_vmentry_offset;
2708
2709 void java_lang_invoke_MethodHandle::compute_offsets() {
2710 Klass* klass_oop = SystemDictionary::MethodHandle_klass();
2711 if (klass_oop != NULL) {
2712 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::java_lang_invoke_MethodType_signature());
2713 compute_offset(_form_offset, klass_oop, vmSymbols::form_name(), vmSymbols::java_lang_invoke_LambdaForm_signature());
2714 }
2715 }
2716
2717 void java_lang_invoke_MemberName::compute_offsets() {
2718 Klass* klass_oop = SystemDictionary::MemberName_klass();
2719 if (klass_oop != NULL) {
2720 compute_offset(_clazz_offset, klass_oop, vmSymbols::clazz_name(), vmSymbols::class_signature());
2721 compute_offset(_name_offset, klass_oop, vmSymbols::name_name(), vmSymbols::string_signature());
2722 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::object_signature());
2723 compute_offset(_flags_offset, klass_oop, vmSymbols::flags_name(), vmSymbols::int_signature());
2724 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2725 }
2726 }
2727
2728 void java_lang_invoke_LambdaForm::compute_offsets() {
2729 Klass* klass_oop = SystemDictionary::LambdaForm_klass();
2730 if (klass_oop != NULL) {
2731 compute_offset(_vmentry_offset, klass_oop, vmSymbols::vmentry_name(), vmSymbols::java_lang_invoke_MemberName_signature());
2732 }
2733 }
2734
2735 oop java_lang_invoke_MethodHandle::type(oop mh) {
2736 return mh->obj_field(_type_offset);
2737 }
2738
2739 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
2740 mh->obj_field_put(_type_offset, mtype);
2741 }
2742
2743 oop java_lang_invoke_MethodHandle::form(oop mh) {
2744 assert(_form_offset != 0, "");
2745 return mh->obj_field(_form_offset);
2746 }
2747
2748 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
2749 assert(_form_offset != 0, "");
2750 mh->obj_field_put(_form_offset, lform);
2751 }
2752
2753 /// MemberName accessors
2754
2755 oop java_lang_invoke_MemberName::clazz(oop mname) {
2756 assert(is_instance(mname), "wrong type");
2757 return mname->obj_field(_clazz_offset);
2758 }
2759
2760 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
2761 assert(is_instance(mname), "wrong type");
2762 mname->obj_field_put(_clazz_offset, clazz);
2763 }
2764
2765 oop java_lang_invoke_MemberName::name(oop mname) {
2766 assert(is_instance(mname), "wrong type");
2767 return mname->obj_field(_name_offset);
2768 }
2769
2770 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
2771 assert(is_instance(mname), "wrong type");
2772 mname->obj_field_put(_name_offset, name);
2773 }
2774
2775 oop java_lang_invoke_MemberName::type(oop mname) {
2776 assert(is_instance(mname), "wrong type");
2777 return mname->obj_field(_type_offset);
2778 }
2779
2780 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
2781 assert(is_instance(mname), "wrong type");
2782 mname->obj_field_put(_type_offset, type);
2783 }
2784
2785 int java_lang_invoke_MemberName::flags(oop mname) {
2786 assert(is_instance(mname), "wrong type");
2787 return mname->int_field(_flags_offset);
2788 }
2789
2790 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
2791 assert(is_instance(mname), "wrong type");
2792 mname->int_field_put(_flags_offset, flags);
2793 }
2794
2795 Metadata* java_lang_invoke_MemberName::vmtarget(oop mname) {
2796 assert(is_instance(mname), "wrong type");
2797 return (Metadata*)mname->address_field(_vmtarget_offset);
2798 }
2799
2800 #if INCLUDE_JVMTI
2801 // Can be executed on VM thread only
2802 void java_lang_invoke_MemberName::adjust_vmtarget(oop mname, Metadata* ref) {
2803 assert((is_instance(mname) && (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0), "wrong type");
2804 assert(Thread::current()->is_VM_thread(), "not VM thread");
2805 mname->address_field_put(_vmtarget_offset, (address)ref);
2806 }
2807 #endif // INCLUDE_JVMTI
2808
2809 void java_lang_invoke_MemberName::set_vmtarget(oop mname, Metadata* ref) {
2810 assert(is_instance(mname), "wrong type");
2811 // check the type of the vmtarget
2812 oop dependency = NULL;
2813 if (ref != NULL) {
2814 switch (flags(mname) & (MN_IS_METHOD |
2815 MN_IS_CONSTRUCTOR |
2816 MN_IS_FIELD)) {
2817 case MN_IS_METHOD:
2818 case MN_IS_CONSTRUCTOR:
2819 assert(ref->is_method(), "should be a method");
2820 dependency = ((Method*)ref)->method_holder()->java_mirror();
2821 break;
2822 case MN_IS_FIELD:
2823 assert(ref->is_klass(), "should be a class");
2824 dependency = ((Klass*)ref)->java_mirror();
2825 break;
2826 default:
2827 ShouldNotReachHere();
2828 }
2829 }
2830 mname->address_field_put(_vmtarget_offset, (address)ref);
2831 // Add a reference to the loader (actually mirror because anonymous classes will not have
2832 // distinct loaders) to ensure the metadata is kept alive
2833 // This mirror may be different than the one in clazz field.
2834 mname->obj_field_put(_vmloader_offset, dependency);
2835 }
2836
2837 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
2838 assert(is_instance(mname), "wrong type");
2839 return (intptr_t) mname->address_field(_vmindex_offset);
2840 }
2841
2842 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
2843 assert(is_instance(mname), "wrong type");
2844 mname->address_field_put(_vmindex_offset, (address) index);
2845 }
2846
2847 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
2848 assert(is_instance(lform), "wrong type");
2849 return lform->obj_field(_vmentry_offset);
2850 }
2851
2852
2853 // Support for java_lang_invoke_MethodType
2854
2855 int java_lang_invoke_MethodType::_rtype_offset;
2856 int java_lang_invoke_MethodType::_ptypes_offset;
2857
2858 void java_lang_invoke_MethodType::compute_offsets() {
2859 Klass* k = SystemDictionary::MethodType_klass();
2860 if (k != NULL) {
2861 compute_offset(_rtype_offset, k, vmSymbols::rtype_name(), vmSymbols::class_signature());
2862 compute_offset(_ptypes_offset, k, vmSymbols::ptypes_name(), vmSymbols::class_array_signature());
2863 }
2864 }
2865
2866 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
2867 st->print("(");
2868 objArrayOop pts = ptypes(mt);
2869 for (int i = 0, limit = pts->length(); i < limit; i++) {
2870 java_lang_Class::print_signature(pts->obj_at(i), st);
2871 }
2872 st->print(")");
2873 java_lang_Class::print_signature(rtype(mt), st);
2874 }
2875
2876 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) {
2877 ResourceMark rm;
2878 stringStream buffer(128);
2879 print_signature(mt, &buffer);
2880 const char* sigstr = buffer.base();
2881 int siglen = (int) buffer.size();
2882 Symbol *name;
2883 if (!intern_if_not_found) {
2884 name = SymbolTable::probe(sigstr, siglen);
2885 } else {
2886 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
2887 }
2888 return name;
2889 }
2890
2891 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
2892 if (mt1 == mt2)
2893 return true;
2894 if (rtype(mt1) != rtype(mt2))
2895 return false;
2896 if (ptype_count(mt1) != ptype_count(mt2))
2897 return false;
2898 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
2899 if (ptype(mt1, i) != ptype(mt2, i))
2900 return false;
2901 }
2902 return true;
2903 }
2904
2905 oop java_lang_invoke_MethodType::rtype(oop mt) {
2906 assert(is_instance(mt), "must be a MethodType");
2907 return mt->obj_field(_rtype_offset);
2908 }
2909
2910 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
2911 assert(is_instance(mt), "must be a MethodType");
2912 return (objArrayOop) mt->obj_field(_ptypes_offset);
2913 }
2914
2915 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
2916 return ptypes(mt)->obj_at(idx);
2917 }
2918
2919 int java_lang_invoke_MethodType::ptype_count(oop mt) {
2920 return ptypes(mt)->length();
2921 }
2922
2923 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
2924 objArrayOop pts = ptypes(mt);
2925 int count = pts->length();
2926 int slots = 0;
2927 for (int i = 0; i < count; i++) {
2928 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
2929 slots += type2size[bt];
2930 }
2931 return slots;
2932 }
2933
2934 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
2935 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
2936 return type2size[bt];
2937 }
2938
2939
2940 // Support for java_lang_invoke_CallSite
2941
2942 int java_lang_invoke_CallSite::_target_offset;
2943
2944 void java_lang_invoke_CallSite::compute_offsets() {
2945 Klass* k = SystemDictionary::CallSite_klass();
2946 if (k != NULL) {
2947 compute_offset(_target_offset, k, vmSymbols::target_name(), vmSymbols::java_lang_invoke_MethodHandle_signature());
2948 }
2949 }
2950
2951
2952 // Support for java_security_AccessControlContext
2953
2954 int java_security_AccessControlContext::_context_offset = 0;
2955 int java_security_AccessControlContext::_privilegedContext_offset = 0;
2956 int java_security_AccessControlContext::_isPrivileged_offset = 0;
2957 int java_security_AccessControlContext::_isAuthorized_offset = -1;
2958
2959 void java_security_AccessControlContext::compute_offsets() {
2960 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
2961 fieldDescriptor fd;
2962 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass());
2963
2964 if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) {
2965 fatal("Invalid layout of java.security.AccessControlContext");
2966 }
2967 _context_offset = fd.offset();
2968
2969 if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) {
2970 fatal("Invalid layout of java.security.AccessControlContext");
2971 }
2972 _privilegedContext_offset = fd.offset();
2973
2974 if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) {
2975 fatal("Invalid layout of java.security.AccessControlContext");
2976 }
2977 _isPrivileged_offset = fd.offset();
2978
2979 // The offset may not be present for bootstrapping with older JDK.
2980 if (ik->find_local_field(vmSymbols::isAuthorized_name(), vmSymbols::bool_signature(), &fd)) {
2981 _isAuthorized_offset = fd.offset();
2982 }
2983 }
2984
2985
2986 bool java_security_AccessControlContext::is_authorized(Handle context) {
2987 assert(context.not_null() && context->klass() == SystemDictionary::AccessControlContext_klass(), "Invalid type");
2988 assert(_isAuthorized_offset != -1, "should be set");
2989 return context->bool_field(_isAuthorized_offset) != 0;
2990 }
2991
2992 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
2993 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
2994 // Ensure klass is initialized
2995 InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->initialize(CHECK_0);
2996 // Allocate result
2997 oop result = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->allocate_instance(CHECK_0);
2998 // Fill in values
2999 result->obj_field_put(_context_offset, context());
3000 result->obj_field_put(_privilegedContext_offset, privileged_context());
3001 result->bool_field_put(_isPrivileged_offset, isPrivileged);
3002 // whitelist AccessControlContexts created by the JVM if present
3003 if (_isAuthorized_offset != -1) {
3004 result->bool_field_put(_isAuthorized_offset, true);
3005 }
3006 return result;
3007 }
3008
3009
3010 // Support for java_lang_ClassLoader
3011
3012 bool java_lang_ClassLoader::offsets_computed = false;
3013 int java_lang_ClassLoader::_loader_data_offset = -1;
3014 int java_lang_ClassLoader::parallelCapable_offset = -1;
3015
3016 ClassLoaderData** java_lang_ClassLoader::loader_data_addr(oop loader) {
3017 assert(loader != NULL && loader->is_oop(), "loader must be oop");
3018 return (ClassLoaderData**) loader->address_field_addr(_loader_data_offset);
3019 }
3020
3021 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
3022 return *java_lang_ClassLoader::loader_data_addr(loader);
3023 }
3024
3025 void java_lang_ClassLoader::compute_offsets() {
3026 assert(!offsets_computed, "offsets should be initialized only once");
3027 offsets_computed = true;
3028
3029 // The field indicating parallelCapable (parallelLockMap) is only present starting in 7,
3030 Klass* k1 = SystemDictionary::ClassLoader_klass();
3031 compute_optional_offset(parallelCapable_offset,
3032 k1, vmSymbols::parallelCapable_name(), vmSymbols::concurrenthashmap_signature());
3033
3034 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3035 }
3036
3037 oop java_lang_ClassLoader::parent(oop loader) {
3038 assert(is_instance(loader), "loader must be oop");
3039 return loader->obj_field(parent_offset);
3040 }
3041
3042 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
3043 assert(is_instance(loader), "loader must be oop");
3044 assert(cl == NULL || is_instance(cl), "cl argument must be oop");
3045 oop acl = loader;
3046 debug_only(jint loop_count = 0);
3047 // This loop taken verbatim from ClassLoader.java:
3048 do {
3049 acl = parent(acl);
3050 if (cl == acl) {
3051 return true;
3052 }
3053 assert(++loop_count > 0, "loop_count overflow");
3054 } while (acl != NULL);
3055 return false;
3056 }
3057
3058
3059 // For class loader classes, parallelCapable defined
3060 // based on non-null field
3061 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
3062 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
3063 if (parallelCapable_offset == -1) {
3064 // Default for backward compatibility is false
3065 return false;
3066 }
3067 return (class_loader->obj_field(parallelCapable_offset) != NULL);
3068 }
3069
3070 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
3071 // Fix for 4474172; see evaluation for more details
3072 loader = non_reflection_class_loader(loader);
3073
3074 oop cl = SystemDictionary::java_system_loader();
3075 while(cl != NULL) {
3076 if (cl == loader) return true;
3077 cl = parent(cl);
3078 }
3079 return false;
3080 }
3081
3082 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
3083 if (loader != NULL) {
3084 // See whether this is one of the class loaders associated with
3085 // the generated bytecodes for reflection, and if so, "magically"
3086 // delegate to its parent to prevent class loading from occurring
3087 // in places where applications using reflection didn't expect it.
3088 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass();
3089 // This might be null in non-1.4 JDKs
3090 if (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)) {
3091 return parent(loader);
3092 }
3093 }
3094 return loader;
3095 }
3096
3097
3098 // Support for java_lang_System
3099 int java_lang_System::in_offset_in_bytes() {
3100 return (InstanceMirrorKlass::offset_of_static_fields() + static_in_offset);
3101 }
3102
3103
3104 int java_lang_System::out_offset_in_bytes() {
3105 return (InstanceMirrorKlass::offset_of_static_fields() + static_out_offset);
3106 }
3107
3108
3109 int java_lang_System::err_offset_in_bytes() {
3110 return (InstanceMirrorKlass::offset_of_static_fields() + static_err_offset);
3111 }
3112
3113
3114 bool java_lang_System::has_security_manager() {
3115 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::System_klass());
3116 address addr = ik->static_field_addr(static_security_offset);
3117 if (UseCompressedOops) {
3118 return oopDesc::load_decode_heap_oop((narrowOop *)addr) != NULL;
3119 } else {
3120 return oopDesc::load_decode_heap_oop((oop*)addr) != NULL;
3121 }
3122 }
3123
3124 int java_lang_Class::_klass_offset;
3125 int java_lang_Class::_array_klass_offset;
3126 int java_lang_Class::_oop_size_offset;
3127 int java_lang_Class::_static_oop_field_count_offset;
3128 int java_lang_Class::_class_loader_offset;
3129 int java_lang_Class::_protection_domain_offset;
3130 int java_lang_Class::_component_mirror_offset;
3131 int java_lang_Class::_init_lock_offset;
3132 int java_lang_Class::_signers_offset;
3133 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL;
3134 int java_lang_Throwable::backtrace_offset;
3135 int java_lang_Throwable::detailMessage_offset;
3136 int java_lang_Throwable::cause_offset;
3137 int java_lang_Throwable::stackTrace_offset;
3138 int java_lang_Throwable::static_unassigned_stacktrace_offset;
3139 int java_lang_reflect_AccessibleObject::override_offset;
3140 int java_lang_reflect_Method::clazz_offset;
3141 int java_lang_reflect_Method::name_offset;
3142 int java_lang_reflect_Method::returnType_offset;
3143 int java_lang_reflect_Method::parameterTypes_offset;
3144 int java_lang_reflect_Method::exceptionTypes_offset;
3145 int java_lang_reflect_Method::slot_offset;
3146 int java_lang_reflect_Method::modifiers_offset;
3147 int java_lang_reflect_Method::signature_offset;
3148 int java_lang_reflect_Method::annotations_offset;
3149 int java_lang_reflect_Method::parameter_annotations_offset;
3150 int java_lang_reflect_Method::annotation_default_offset;
3151 int java_lang_reflect_Method::type_annotations_offset;
3152 int java_lang_reflect_Constructor::clazz_offset;
3153 int java_lang_reflect_Constructor::parameterTypes_offset;
3154 int java_lang_reflect_Constructor::exceptionTypes_offset;
3155 int java_lang_reflect_Constructor::slot_offset;
3156 int java_lang_reflect_Constructor::modifiers_offset;
3157 int java_lang_reflect_Constructor::signature_offset;
3158 int java_lang_reflect_Constructor::annotations_offset;
3159 int java_lang_reflect_Constructor::parameter_annotations_offset;
3160 int java_lang_reflect_Constructor::type_annotations_offset;
3161 int java_lang_reflect_Field::clazz_offset;
3162 int java_lang_reflect_Field::name_offset;
3163 int java_lang_reflect_Field::type_offset;
3164 int java_lang_reflect_Field::slot_offset;
3165 int java_lang_reflect_Field::modifiers_offset;
3166 int java_lang_reflect_Field::signature_offset;
3167 int java_lang_reflect_Field::annotations_offset;
3168 int java_lang_reflect_Field::type_annotations_offset;
3169 int java_lang_reflect_Parameter::name_offset;
3170 int java_lang_reflect_Parameter::modifiers_offset;
3171 int java_lang_reflect_Parameter::index_offset;
3172 int java_lang_reflect_Parameter::executable_offset;
3173 int java_lang_boxing_object::value_offset;
3174 int java_lang_boxing_object::long_value_offset;
3175 int java_lang_ref_Reference::referent_offset;
3176 int java_lang_ref_Reference::queue_offset;
3177 int java_lang_ref_Reference::next_offset;
3178 int java_lang_ref_Reference::discovered_offset;
3179 int java_lang_ref_Reference::static_lock_offset;
3180 int java_lang_ref_Reference::static_pending_offset;
3181 int java_lang_ref_Reference::number_of_fake_oop_fields;
3182 int java_lang_ref_SoftReference::timestamp_offset;
3183 int java_lang_ref_SoftReference::static_clock_offset;
3184 int java_lang_ClassLoader::parent_offset;
3185 int java_lang_System::static_in_offset;
3186 int java_lang_System::static_out_offset;
3187 int java_lang_System::static_err_offset;
3188 int java_lang_System::static_security_offset;
3189 int java_lang_StackTraceElement::declaringClass_offset;
3190 int java_lang_StackTraceElement::methodName_offset;
3191 int java_lang_StackTraceElement::fileName_offset;
3192 int java_lang_StackTraceElement::lineNumber_offset;
3193 int java_lang_AssertionStatusDirectives::classes_offset;
3194 int java_lang_AssertionStatusDirectives::classEnabled_offset;
3195 int java_lang_AssertionStatusDirectives::packages_offset;
3196 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
3197 int java_lang_AssertionStatusDirectives::deflt_offset;
3198 int java_nio_Buffer::_limit_offset;
3199 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0;
3200 int sun_reflect_ConstantPool::_oop_offset;
3201 int sun_reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
3202
3203
3204 // Support for java_lang_StackTraceElement
3205
3206 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
3207 element->obj_field_put(fileName_offset, value);
3208 }
3209
3210 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
3211 element->obj_field_put(declaringClass_offset, value);
3212 }
3213
3214 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
3215 element->obj_field_put(methodName_offset, value);
3216 }
3217
3218 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
3219 element->int_field_put(lineNumber_offset, value);
3220 }
3221
3222
3223 // Support for java Assertions - java_lang_AssertionStatusDirectives.
3224
3225 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
3226 o->obj_field_put(classes_offset, val);
3227 }
3228
3229 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
3230 o->obj_field_put(classEnabled_offset, val);
3231 }
3232
3233 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
3234 o->obj_field_put(packages_offset, val);
3235 }
3236
3237 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
3238 o->obj_field_put(packageEnabled_offset, val);
3239 }
3240
3241 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
3242 o->bool_field_put(deflt_offset, val);
3243 }
3244
3245
3246 // Support for intrinsification of java.nio.Buffer.checkIndex
3247 int java_nio_Buffer::limit_offset() {
3248 return _limit_offset;
3249 }
3250
3251
3252 void java_nio_Buffer::compute_offsets() {
3253 Klass* k = SystemDictionary::nio_Buffer_klass();
3254 assert(k != NULL, "must be loaded in 1.4+");
3255 compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature());
3256 }
3257
3258 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) {
3259 if (_owner_offset != 0) return;
3260
3261 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK);
3262 Klass* k = SystemDictionary::abstract_ownable_synchronizer_klass();
3263 compute_offset(_owner_offset, k,
3264 vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature());
3265 }
3266
3267 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
3268 assert(_owner_offset != 0, "Must be initialized");
3269 return obj->obj_field(_owner_offset);
3270 }
3271
3272 // Compute hard-coded offsets
3273 // Invoked before SystemDictionary::initialize, so pre-loaded classes
3274 // are not available to determine the offset_of_static_fields.
3275 void JavaClasses::compute_hard_coded_offsets() {
3276 const int x = heapOopSize;
3277 const int header = instanceOopDesc::base_offset_in_bytes();
3278
3279 // Throwable Class
3280 java_lang_Throwable::backtrace_offset = java_lang_Throwable::hc_backtrace_offset * x + header;
3281 java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header;
3282 java_lang_Throwable::cause_offset = java_lang_Throwable::hc_cause_offset * x + header;
3283 java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header;
3284 java_lang_Throwable::static_unassigned_stacktrace_offset = java_lang_Throwable::hc_static_unassigned_stacktrace_offset * x;
3285
3286 // java_lang_boxing_object
3287 java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header;
3288 java_lang_boxing_object::long_value_offset = align_size_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong);
3289
3290 // java_lang_ref_Reference:
3291 java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header;
3292 java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header;
3293 java_lang_ref_Reference::next_offset = java_lang_ref_Reference::hc_next_offset * x + header;
3294 java_lang_ref_Reference::discovered_offset = java_lang_ref_Reference::hc_discovered_offset * x + header;
3295 java_lang_ref_Reference::static_lock_offset = java_lang_ref_Reference::hc_static_lock_offset * x;
3296 java_lang_ref_Reference::static_pending_offset = java_lang_ref_Reference::hc_static_pending_offset * x;
3297 // Artificial fields for java_lang_ref_Reference
3298 // The first field is for the discovered field added in 1.4
3299 java_lang_ref_Reference::number_of_fake_oop_fields = 1;
3300
3301 // java_lang_ref_SoftReference Class
3302 java_lang_ref_SoftReference::timestamp_offset = align_size_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong);
3303 // Don't multiply static fields because they are always in wordSize units
3304 java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x;
3305
3306 // java_lang_ClassLoader
3307 java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header;
3308
3309 // java_lang_System
3310 java_lang_System::static_in_offset = java_lang_System::hc_static_in_offset * x;
3311 java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x;
3312 java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x;
3313 java_lang_System::static_security_offset = java_lang_System::hc_static_security_offset * x;
3314
3315 // java_lang_StackTraceElement
3316 java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset * x + header;
3317 java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header;
3318 java_lang_StackTraceElement::fileName_offset = java_lang_StackTraceElement::hc_fileName_offset * x + header;
3319 java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header;
3320 java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header;
3321 java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header;
3322 java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header;
3323 java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header;
3324 java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header;
3325
3326 }
3327
3328
3329 // Compute non-hard-coded field offsets of all the classes in this file
3330 void JavaClasses::compute_offsets() {
3331 // java_lang_Class::compute_offsets was called earlier in bootstrap
3332 java_lang_ClassLoader::compute_offsets();
3333 java_lang_Thread::compute_offsets();
3334 java_lang_ThreadGroup::compute_offsets();
3335 java_lang_invoke_MethodHandle::compute_offsets();
3336 java_lang_invoke_DirectMethodHandle::compute_offsets();
3337 java_lang_invoke_MemberName::compute_offsets();
3338 java_lang_invoke_LambdaForm::compute_offsets();
3339 java_lang_invoke_MethodType::compute_offsets();
3340 java_lang_invoke_CallSite::compute_offsets();
3341 java_security_AccessControlContext::compute_offsets();
3342 // Initialize reflection classes. The layouts of these classes
3343 // changed with the new reflection implementation in JDK 1.4, and
3344 // since the Universe doesn't know what JDK version it is until this
3345 // point we defer computation of these offsets until now.
3346 java_lang_reflect_AccessibleObject::compute_offsets();
3347 java_lang_reflect_Method::compute_offsets();
3348 java_lang_reflect_Constructor::compute_offsets();
3349 java_lang_reflect_Field::compute_offsets();
3350 java_nio_Buffer::compute_offsets();
3351 sun_reflect_ConstantPool::compute_offsets();
3352 sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets();
3353 java_lang_reflect_Parameter::compute_offsets();
3354
3355 // generated interpreter code wants to know about the offsets we just computed:
3356 AbstractAssembler::update_delayed_values();
3357 }
3358
3359 #ifndef PRODUCT
3360
3361 // These functions exist to assert the validity of hard-coded field offsets to guard
3362 // against changes in the class files
3363
3364 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
3365 EXCEPTION_MARK;
3366 fieldDescriptor fd;
3367 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3368 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3369 instanceKlassHandle h_klass (THREAD, k);
3370 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3371 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3372 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3373 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
3374 return false;
3375 }
3376 if (fd.is_static()) {
3377 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
3378 return false;
3379 }
3380 if (fd.offset() == hardcoded_offset ) {
3381 return true;
3382 } else {
3383 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
3384 klass_name, field_name, hardcoded_offset, fd.offset());
3385 return false;
3386 }
3387 }
3388
3389
3390 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
3391 EXCEPTION_MARK;
3392 fieldDescriptor fd;
3393 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3394 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3395 instanceKlassHandle h_klass (THREAD, k);
3396 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3397 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3398 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3399 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3400 return false;
3401 }
3402 if (!fd.is_static()) {
3403 tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name);
3404 return false;
3405 }
3406 if (fd.offset() == hardcoded_offset + InstanceMirrorKlass::offset_of_static_fields()) {
3407 return true;
3408 } else {
3409 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());
3410 return false;
3411 }
3412 }
3413
3414
3415 bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) {
3416 EXCEPTION_MARK;
3417 fieldDescriptor fd;
3418 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3419 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3420 instanceKlassHandle h_klass (THREAD, k);
3421 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3422 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3423 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3424 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3425 return false;
3426 }
3427 if (!fd.is_static() || !fd.has_initial_value()) {
3428 tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name);
3429 return false;
3430 }
3431 if (!fd.initial_value_tag().is_int()) {
3432 tty->print_cr("Static field %s.%s is not an int", klass_name, field_name);
3433 return false;
3434 }
3435 jint field_value = fd.int_initial_value();
3436 if (field_value == hardcoded_constant) {
3437 return true;
3438 } else {
3439 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);
3440 return false;
3441 }
3442 }
3443
3444
3445 // Check the hard-coded field offsets of all the classes in this file
3446
3447 void JavaClasses::check_offsets() {
3448 bool valid = true;
3449 HandleMark hm;
3450
3451 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3452 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
3453
3454 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3455 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
3456
3457 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3458 valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig)
3459
3460 #define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \
3461 valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig)
3462
3463 // java.lang.String
3464
3465 CHECK_OFFSET("java/lang/String", java_lang_String, value, "[C");
3466 if (java_lang_String::has_offset_field()) {
3467 CHECK_OFFSET("java/lang/String", java_lang_String, offset, "I");
3468 CHECK_OFFSET("java/lang/String", java_lang_String, count, "I");
3469 }
3470 if (java_lang_String::has_hash_field()) {
3471 CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I");
3472 }
3473
3474 // java.lang.Class
3475
3476 // Fake fields
3477 // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked
3478 // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked
3479
3480 // java.lang.Throwable
3481
3482 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;");
3483 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;");
3484 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, cause, "Ljava/lang/Throwable;");
3485 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;");
3486
3487 // Boxed primitive objects (java_lang_boxing_object)
3488
3489 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
3490 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
3491 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
3492 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
3493 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
3494 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
3495 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
3496 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
3497
3498 // java.lang.ClassLoader
3499
3500 CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent, "Ljava/lang/ClassLoader;");
3501
3502 // java.lang.System
3503
3504 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, in, "Ljava/io/InputStream;");
3505 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;");
3506 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;");
3507 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, security, "Ljava/lang/SecurityManager;");
3508
3509 // java.lang.StackTraceElement
3510
3511 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;");
3512 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;");
3513 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, fileName, "Ljava/lang/String;");
3514 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I");
3515
3516 // java.lang.ref.Reference
3517
3518 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
3519 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
3520 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
3521 // Fake field
3522 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
3523 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, lock, "Ljava/lang/ref/Reference$Lock;");
3524 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, pending, "Ljava/lang/ref/Reference;");
3525
3526 // java.lang.ref.SoftReference
3527
3528 CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J");
3529 CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J");
3530
3531 // java.lang.AssertionStatusDirectives
3532 //
3533 // The CheckAssertionStatusDirectives boolean can be removed from here and
3534 // globals.hpp after the AssertionStatusDirectives class has been integrated
3535 // into merlin "for some time." Without it, the vm will fail with early
3536 // merlin builds.
3537
3538 if (CheckAssertionStatusDirectives) {
3539 const char* nm = "java/lang/AssertionStatusDirectives";
3540 const char* sig = "[Ljava/lang/String;";
3541 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig);
3542 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z");
3543 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig);
3544 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z");
3545 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z");
3546 }
3547
3548 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
3549 }
3550
3551 #endif // PRODUCT
3552
3553 int InjectedField::compute_offset() {
3554 Klass* klass_oop = klass();
3555 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
3556 if (!may_be_java && !fs.access_flags().is_internal()) {
3557 // Only look at injected fields
3558 continue;
3559 }
3560 if (fs.name() == name() && fs.signature() == signature()) {
3561 return fs.offset();
3562 }
3563 }
3564 ResourceMark rm;
3565 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)" : "");
3566 #ifndef PRODUCT
3567 klass_oop->print();
3568 tty->print_cr("all fields:");
3569 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
3570 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
3571 }
3572 #endif //PRODUCT
3573 fatal("Invalid layout of preloaded class");
3574 return -1;
3575 }
3576
3577 void javaClasses_init() {
3578 JavaClasses::compute_offsets();
3579 JavaClasses::check_offsets();
3580 FilteredFieldsMap::initialize(); // must be done after computing offsets.
3581 }