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/symbolTable.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 "prims/jvmtiRedefineClassesTrace.hpp"
45 #include "runtime/fieldDescriptor.hpp"
46 #include "runtime/handles.inline.hpp"
47 #include "runtime/interfaceSupport.hpp"
48 #include "runtime/java.hpp"
49 #include "runtime/javaCalls.hpp"
50 #include "runtime/safepoint.hpp"
51 #include "runtime/thread.inline.hpp"
52 #include "runtime/vframe.hpp"
53 #include "utilities/preserveException.hpp"
54
55 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
56
57 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \
58 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum);
59
60 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \
61 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java },
62
63 InjectedField JavaClasses::_injected_fields[] = {
64 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
65 };
66
67 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
68 return _injected_fields[id].compute_offset();
69 }
70
71
72 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
73 *field_count = 0;
74
75 vmSymbols::SID sid = vmSymbols::find_sid(class_name);
76 if (sid == vmSymbols::NO_SID) {
77 // Only well known classes can inject fields
78 return NULL;
79 }
80
81 int count = 0;
82 int start = -1;
83
84 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
85 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \
86 count++; \
87 if (start == -1) start = klass##_##name##_enum; \
88 }
89 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
90 #undef LOOKUP_INJECTED_FIELD
91
92 if (start != -1) {
93 *field_count = count;
94 return _injected_fields + start;
95 }
96 return NULL;
97 }
98
99
100 static bool find_field(InstanceKlass* ik,
101 Symbol* name_symbol, Symbol* signature_symbol,
102 fieldDescriptor* fd,
103 bool allow_super = false) {
104 if (allow_super)
105 return ik->find_field(name_symbol, signature_symbol, fd) != NULL;
106 else
107 return ik->find_local_field(name_symbol, signature_symbol, fd);
108 }
109
110 // Helpful routine for computing field offsets at run time rather than hardcoding them
111 static void
112 compute_offset(int &dest_offset,
113 Klass* klass_oop, Symbol* name_symbol, Symbol* signature_symbol,
114 bool allow_super = false) {
115 fieldDescriptor fd;
116 InstanceKlass* ik = InstanceKlass::cast(klass_oop);
117 if (!find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) {
118 ResourceMark rm;
119 tty->print_cr("Invalid layout of %s at %s", ik->external_name(), name_symbol->as_C_string());
120 #ifndef PRODUCT
121 klass_oop->print();
122 tty->print_cr("all fields:");
123 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
124 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
125 }
126 #endif //PRODUCT
127 fatal("Invalid layout of preloaded class");
128 }
129 dest_offset = fd.offset();
130 }
131
132 // Same as above but for "optional" offsets that might not be present in certain JDK versions
133 static void
134 compute_optional_offset(int& dest_offset,
135 Klass* klass_oop, Symbol* name_symbol, Symbol* signature_symbol,
136 bool allow_super = false) {
137 fieldDescriptor fd;
138 InstanceKlass* ik = InstanceKlass::cast(klass_oop);
139 if (find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) {
140 dest_offset = fd.offset();
141 }
142 }
143
144
145 int java_lang_String::value_offset = 0;
146 int java_lang_String::offset_offset = 0;
147 int java_lang_String::count_offset = 0;
148 int java_lang_String::hash_offset = 0;
149
150 bool java_lang_String::initialized = false;
151
152 void java_lang_String::compute_offsets() {
153 assert(!initialized, "offsets should be initialized only once");
154
155 Klass* k = SystemDictionary::String_klass();
156 compute_offset(value_offset, k, vmSymbols::value_name(), vmSymbols::char_array_signature());
157 compute_optional_offset(offset_offset, k, vmSymbols::offset_name(), vmSymbols::int_signature());
158 compute_optional_offset(count_offset, k, vmSymbols::count_name(), vmSymbols::int_signature());
159 compute_optional_offset(hash_offset, k, vmSymbols::hash_name(), vmSymbols::int_signature());
160
161 initialized = true;
162 }
163
164 Handle java_lang_String::basic_create(int length, TRAPS) {
165 assert(initialized, "Must be initialized");
166 // Create the String object first, so there's a chance that the String
167 // and the char array it points to end up in the same cache line.
168 oop obj;
169 obj = InstanceKlass::cast(SystemDictionary::String_klass())->allocate_instance(CHECK_NH);
170
171 // Create the char array. The String object must be handlized here
172 // because GC can happen as a result of the allocation attempt.
173 Handle h_obj(THREAD, obj);
174 typeArrayOop buffer;
175 buffer = oopFactory::new_charArray(length, CHECK_NH);
176
177 // Point the String at the char array
178 obj = h_obj();
179 set_value(obj, buffer);
180 // No need to zero the offset, allocation zero'ed the entire String object
181 assert(offset(obj) == 0, "initial String offset should be zero");
182 //set_offset(obj, 0);
183 set_count(obj, length);
184
185 return h_obj;
186 }
187
188 Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) {
189 Handle h_obj = basic_create(length, CHECK_NH);
190 typeArrayOop buffer = value(h_obj());
191 for (int index = 0; index < length; index++) {
192 buffer->char_at_put(index, unicode[index]);
193 }
194 return h_obj;
195 }
196
197 oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) {
198 Handle h_obj = create_from_unicode(unicode, length, CHECK_0);
199 return h_obj();
200 }
201
202 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
203 if (utf8_str == NULL) {
204 return Handle();
205 }
206 int length = UTF8::unicode_length(utf8_str);
207 Handle h_obj = basic_create(length, CHECK_NH);
208 if (length > 0) {
209 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
210 }
211 return h_obj;
212 }
213
214 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
215 Handle h_obj = create_from_str(utf8_str, CHECK_0);
216 return h_obj();
217 }
218
219 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) {
220 int length = UTF8::unicode_length((char*)symbol->bytes(), symbol->utf8_length());
221 Handle h_obj = basic_create(length, CHECK_NH);
222 if (length > 0) {
223 UTF8::convert_to_unicode((char*)symbol->bytes(), value(h_obj())->char_at_addr(0), length);
224 }
225 return h_obj;
226 }
227
228 // Converts a C string to a Java String based on current encoding
229 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
230 assert(str != NULL, "bad arguments");
231
232 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *);
233 static to_java_string_fn_t _to_java_string_fn = NULL;
234
235 if (_to_java_string_fn == NULL) {
236 void *lib_handle = os::native_java_library();
237 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform"));
238 if (_to_java_string_fn == NULL) {
239 fatal("NewStringPlatform missing");
240 }
241 }
242
243 jstring js = NULL;
244 { JavaThread* thread = (JavaThread*)THREAD;
245 assert(thread->is_Java_thread(), "must be java thread");
246 HandleMark hm(thread);
247 ThreadToNativeFromVM ttn(thread);
248 js = (_to_java_string_fn)(thread->jni_environment(), str);
249 }
250 return Handle(THREAD, JNIHandles::resolve(js));
251 }
252
253 // Converts a Java String to a native C string that can be used for
254 // native OS calls.
255 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
256
257 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
258 static to_platform_string_fn_t _to_platform_string_fn = NULL;
259
260 if (_to_platform_string_fn == NULL) {
261 void *lib_handle = os::native_java_library();
262 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
263 if (_to_platform_string_fn == NULL) {
264 fatal("GetStringPlatformChars missing");
265 }
266 }
267
268 char *native_platform_string;
269 { JavaThread* thread = (JavaThread*)THREAD;
270 assert(thread->is_Java_thread(), "must be java thread");
271 JNIEnv *env = thread->jni_environment();
272 jstring js = (jstring) JNIHandles::make_local(env, java_string());
273 bool is_copy;
274 HandleMark hm(thread);
275 ThreadToNativeFromVM ttn(thread);
276 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
277 assert(is_copy == JNI_TRUE, "is_copy value changed");
278 JNIHandles::destroy_local(js);
279 }
280 return native_platform_string;
281 }
282
283 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) {
284 oop obj = java_string();
285 // Typical usage is to convert all '/' to '.' in string.
286 typeArrayOop value = java_lang_String::value(obj);
287 int offset = java_lang_String::offset(obj);
288 int length = java_lang_String::length(obj);
289
290 // First check if any from_char exist
291 int index; // Declared outside, used later
292 for (index = 0; index < length; index++) {
293 if (value->char_at(index + offset) == from_char) {
294 break;
295 }
296 }
297 if (index == length) {
298 // No from_char, so do not copy.
299 return java_string;
300 }
301
302 // Create new UNICODE buffer. Must handlize value because GC
303 // may happen during String and char array creation.
304 typeArrayHandle h_value(THREAD, value);
305 Handle string = basic_create(length, CHECK_NH);
306
307 typeArrayOop from_buffer = h_value();
308 typeArrayOop to_buffer = java_lang_String::value(string());
309
310 // Copy contents
311 for (index = 0; index < length; index++) {
312 jchar c = from_buffer->char_at(index + offset);
313 if (c == from_char) {
314 c = to_char;
315 }
316 to_buffer->char_at_put(index, c);
317 }
318 return string;
319 }
320
321 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
322 typeArrayOop value = java_lang_String::value(java_string);
323 int offset = java_lang_String::offset(java_string);
324 length = java_lang_String::length(java_string);
325
326 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
327 if (result != NULL) {
328 for (int index = 0; index < length; index++) {
329 result[index] = value->char_at(index + offset);
330 }
331 } else {
332 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
333 }
334 return result;
335 }
336
337 unsigned int java_lang_String::hash_code(oop java_string) {
338 int length = java_lang_String::length(java_string);
339 // Zero length string will hash to zero with String.hashCode() function.
340 if (length == 0) return 0;
341
342 typeArrayOop value = java_lang_String::value(java_string);
343 int offset = java_lang_String::offset(java_string);
344 return java_lang_String::hash_code(value->char_at_addr(offset), length);
345 }
346
347 char* java_lang_String::as_quoted_ascii(oop java_string) {
348 typeArrayOop value = java_lang_String::value(java_string);
349 int offset = java_lang_String::offset(java_string);
350 int length = java_lang_String::length(java_string);
351
352 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
353 if (base == NULL) return NULL;
354
355 int result_length = UNICODE::quoted_ascii_length(base, length) + 1;
356 char* result = NEW_RESOURCE_ARRAY(char, result_length);
357 UNICODE::as_quoted_ascii(base, length, result, result_length);
358 assert(result_length >= length + 1, "must not be shorter");
359 assert(result_length == (int)strlen(result) + 1, "must match");
360 return result;
361 }
362
363 unsigned int java_lang_String::hash_string(oop java_string) {
364 int length = java_lang_String::length(java_string);
365 // Zero length string doesn't hash necessarily hash to zero.
366 if (length == 0) {
367 return StringTable::hash_string(NULL, 0);
368 }
369
370 typeArrayOop value = java_lang_String::value(java_string);
371 int offset = java_lang_String::offset(java_string);
372 return StringTable::hash_string(value->char_at_addr(offset), length);
373 }
374
375 Symbol* java_lang_String::as_symbol(Handle java_string, TRAPS) {
376 oop obj = java_string();
377 typeArrayOop value = java_lang_String::value(obj);
378 int offset = java_lang_String::offset(obj);
379 int length = java_lang_String::length(obj);
380 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
381 Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD);
382 return sym;
383 }
384
385 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
386 typeArrayOop value = java_lang_String::value(java_string);
387 int offset = java_lang_String::offset(java_string);
388 int length = java_lang_String::length(java_string);
389 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
390 return SymbolTable::probe_unicode(base, length);
391 }
392
393
394 int java_lang_String::utf8_length(oop java_string) {
395 typeArrayOop value = java_lang_String::value(java_string);
396 int offset = java_lang_String::offset(java_string);
397 int length = java_lang_String::length(java_string);
398 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
399 return UNICODE::utf8_length(position, length);
400 }
401
402 char* java_lang_String::as_utf8_string(oop java_string) {
403 typeArrayOop value = java_lang_String::value(java_string);
404 int offset = java_lang_String::offset(java_string);
405 int length = java_lang_String::length(java_string);
406 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
407 return UNICODE::as_utf8(position, length);
408 }
409
410 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) {
411 typeArrayOop value = java_lang_String::value(java_string);
412 int offset = java_lang_String::offset(java_string);
413 int length = java_lang_String::length(java_string);
414 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
415 return UNICODE::as_utf8(position, length, buf, buflen);
416 }
417
418 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
419 typeArrayOop value = java_lang_String::value(java_string);
420 int offset = java_lang_String::offset(java_string);
421 int length = java_lang_String::length(java_string);
422 assert(start + len <= length, "just checking");
423 jchar* position = value->char_at_addr(offset + start);
424 return UNICODE::as_utf8(position, len);
425 }
426
427 bool java_lang_String::equals(oop java_string, jchar* chars, int len) {
428 assert(java_string->klass() == SystemDictionary::String_klass(),
429 "must be java_string");
430 typeArrayOop value = java_lang_String::value(java_string);
431 int offset = java_lang_String::offset(java_string);
432 int length = java_lang_String::length(java_string);
433 if (length != len) {
434 return false;
435 }
436 for (int i = 0; i < len; i++) {
437 if (value->char_at(i + offset) != chars[i]) {
438 return false;
439 }
440 }
441 return true;
442 }
443
444 bool java_lang_String::equals(oop str1, oop str2) {
445 assert(str1->klass() == SystemDictionary::String_klass(),
446 "must be java String");
447 assert(str2->klass() == SystemDictionary::String_klass(),
448 "must be java String");
449 typeArrayOop value1 = java_lang_String::value(str1);
450 int offset1 = java_lang_String::offset(str1);
451 int length1 = java_lang_String::length(str1);
452 typeArrayOop value2 = java_lang_String::value(str2);
453 int offset2 = java_lang_String::offset(str2);
454 int length2 = java_lang_String::length(str2);
455
456 if (length1 != length2) {
457 return false;
458 }
459 for (int i = 0; i < length1; i++) {
460 if (value1->char_at(i + offset1) != value2->char_at(i + offset2)) {
461 return false;
462 }
463 }
464 return true;
465 }
466
467 void java_lang_String::print(oop java_string, outputStream* st) {
468 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string");
469 typeArrayOop value = java_lang_String::value(java_string);
470 int offset = java_lang_String::offset(java_string);
471 int length = java_lang_String::length(java_string);
472
473 int end = MIN2(length, 100);
474 if (value == NULL) {
475 // This can happen if, e.g., printing a String
476 // object before its initializer has been called
477 st->print_cr("NULL");
478 } else {
479 st->print("\"");
480 for (int index = 0; index < length; index++) {
481 st->print("%c", value->char_at(index + offset));
482 }
483 st->print("\"");
484 }
485 }
486
487
488 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
489 assert(mirror.not_null() && fd->is_static(), "just checking");
490 if (fd->has_initial_value()) {
491 BasicType t = fd->field_type();
492 switch (t) {
493 case T_BYTE:
494 mirror()->byte_field_put(fd->offset(), fd->int_initial_value());
495 break;
496 case T_BOOLEAN:
497 mirror()->bool_field_put(fd->offset(), fd->int_initial_value());
498 break;
499 case T_CHAR:
500 mirror()->char_field_put(fd->offset(), fd->int_initial_value());
501 break;
502 case T_SHORT:
503 mirror()->short_field_put(fd->offset(), fd->int_initial_value());
504 break;
505 case T_INT:
506 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
507 break;
508 case T_FLOAT:
509 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
510 break;
511 case T_DOUBLE:
512 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
513 break;
514 case T_LONG:
515 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
516 break;
517 case T_OBJECT:
518 {
519 #ifdef ASSERT
520 TempNewSymbol sym = SymbolTable::new_symbol("Ljava/lang/String;", CHECK);
521 assert(fd->signature() == sym, "just checking");
522 #endif
523 oop string = fd->string_initial_value(CHECK);
524 mirror()->obj_field_put(fd->offset(), string);
525 }
526 break;
527 default:
528 THROW_MSG(vmSymbols::java_lang_ClassFormatError(),
529 "Illegal ConstantValue attribute in class file");
530 }
531 }
532 }
533
534
535 void java_lang_Class::fixup_mirror(KlassHandle k, TRAPS) {
536 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
537
538 // If the offset was read from the shared archive, it was fixed up already
539 if (!k->is_shared()) {
540 if (k->oop_is_instance()) {
541 // During bootstrap, java.lang.Class wasn't loaded so static field
542 // offsets were computed without the size added it. Go back and
543 // update all the static field offsets to included the size.
544 for (JavaFieldStream fs(InstanceKlass::cast(k())); !fs.done(); fs.next()) {
545 if (fs.access_flags().is_static()) {
546 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields();
547 fs.set_offset(real_offset);
548 }
549 }
550 }
551 }
552 create_mirror(k, Handle(NULL), Handle(NULL), CHECK);
553 }
554
555 void java_lang_Class::initialize_mirror_fields(KlassHandle k,
556 Handle mirror,
557 Handle protection_domain,
558 TRAPS) {
559 // Allocate a simple java object for a lock.
560 // This needs to be a java object because during class initialization
561 // it can be held across a java call.
562 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
563 set_init_lock(mirror(), r);
564
565 // Set protection domain also
566 set_protection_domain(mirror(), protection_domain());
567
568 // Initialize static fields
569 InstanceKlass::cast(k())->do_local_static_fields(&initialize_static_field, mirror, CHECK);
570 }
571
572 void java_lang_Class::create_mirror(KlassHandle k, Handle class_loader,
573 Handle protection_domain, TRAPS) {
574 assert(k->java_mirror() == NULL, "should only assign mirror once");
575 // Use this moment of initialization to cache modifier_flags also,
576 // to support Class.getModifiers(). Instance classes recalculate
577 // the cached flags after the class file is parsed, but before the
578 // class is put into the system dictionary.
579 int computed_modifiers = k->compute_modifier_flags(CHECK);
580 k->set_modifier_flags(computed_modifiers);
581 // Class_klass has to be loaded because it is used to allocate
582 // the mirror.
583 if (SystemDictionary::Class_klass_loaded()) {
584 // Allocate mirror (java.lang.Class instance)
585 Handle mirror = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK);
586
587 // Setup indirection from mirror->klass
588 if (!k.is_null()) {
589 java_lang_Class::set_klass(mirror(), k());
590 }
591
592 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
593 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
594
595 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
596
597 // It might also have a component mirror. This mirror must already exist.
598 if (k->oop_is_array()) {
599 Handle comp_mirror;
600 if (k->oop_is_typeArray()) {
601 BasicType type = TypeArrayKlass::cast(k())->element_type();
602 comp_mirror = Universe::java_mirror(type);
603 } else {
604 assert(k->oop_is_objArray(), "Must be");
605 Klass* element_klass = ObjArrayKlass::cast(k())->element_klass();
606 assert(element_klass != NULL, "Must have an element klass");
607 comp_mirror = element_klass->java_mirror();
608 }
609 assert(comp_mirror.not_null(), "must have a mirror");
610
611 // Two-way link between the array klass and its component mirror:
612 ArrayKlass::cast(k())->set_component_mirror(comp_mirror());
613 set_array_klass(comp_mirror(), k());
614 } else {
615 assert(k->oop_is_instance(), "Must be");
616
617 initialize_mirror_fields(k, mirror, protection_domain, THREAD);
618 if (HAS_PENDING_EXCEPTION) {
619 // If any of the fields throws an exception like OOM remove the klass field
620 // from the mirror so GC doesn't follow it after the klass has been deallocated.
621 // This mirror looks like a primitive type, which logically it is because it
622 // it represents no class.
623 java_lang_Class::set_klass(mirror(), NULL);
624 return;
625 }
626 }
627
628 // set the classLoader field in the java_lang_Class instance
629 assert(class_loader() == k->class_loader(), "should be same");
630 set_class_loader(mirror(), class_loader());
631
632 // Setup indirection from klass->mirror last
633 // after any exceptions can happen during allocations.
634 if (!k.is_null()) {
635 k->set_java_mirror(mirror());
636 }
637 } else {
638 if (fixup_mirror_list() == NULL) {
639 GrowableArray<Klass*>* list =
640 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true);
641 set_fixup_mirror_list(list);
642 }
643 fixup_mirror_list()->push(k());
644 }
645 }
646
647
648 int java_lang_Class::oop_size(oop java_class) {
649 assert(_oop_size_offset != 0, "must be set");
650 return java_class->int_field(_oop_size_offset);
651 }
652 void java_lang_Class::set_oop_size(oop java_class, int size) {
653 assert(_oop_size_offset != 0, "must be set");
654 java_class->int_field_put(_oop_size_offset, size);
655 }
656 int java_lang_Class::static_oop_field_count(oop java_class) {
657 assert(_static_oop_field_count_offset != 0, "must be set");
658 return java_class->int_field(_static_oop_field_count_offset);
659 }
660 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
661 assert(_static_oop_field_count_offset != 0, "must be set");
662 java_class->int_field_put(_static_oop_field_count_offset, size);
663 }
664
665 oop java_lang_Class::protection_domain(oop java_class) {
666 assert(_protection_domain_offset != 0, "must be set");
667 return java_class->obj_field(_protection_domain_offset);
668 }
669 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
670 assert(_protection_domain_offset != 0, "must be set");
671 java_class->obj_field_put(_protection_domain_offset, pd);
672 }
673
674 oop java_lang_Class::init_lock(oop java_class) {
675 assert(_init_lock_offset != 0, "must be set");
676 return java_class->obj_field(_init_lock_offset);
677 }
678 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
679 assert(_init_lock_offset != 0, "must be set");
680 java_class->obj_field_put(_init_lock_offset, init_lock);
681 }
682
683 objArrayOop java_lang_Class::signers(oop java_class) {
684 assert(_signers_offset != 0, "must be set");
685 return (objArrayOop)java_class->obj_field(_signers_offset);
686 }
687 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) {
688 assert(_signers_offset != 0, "must be set");
689 java_class->obj_field_put(_signers_offset, (oop)signers);
690 }
691
692
693 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
694 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet.
695 if (_class_loader_offset != 0) {
696 java_class->obj_field_put(_class_loader_offset, loader);
697 }
698 }
699
700 oop java_lang_Class::class_loader(oop java_class) {
701 assert(_class_loader_offset != 0, "must be set");
702 return java_class->obj_field(_class_loader_offset);
703 }
704
705 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
706 // This should be improved by adding a field at the Java level or by
707 // introducing a new VM klass (see comment in ClassFileParser)
708 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0);
709 if (type != T_VOID) {
710 Klass* aklass = Universe::typeArrayKlassObj(type);
711 assert(aklass != NULL, "correct bootstrap");
712 set_array_klass(java_class, aklass);
713 }
714 #ifdef ASSERT
715 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass());
716 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
717 #endif
718 return java_class;
719 }
720
721
722 Klass* java_lang_Class::as_Klass(oop java_class) {
723 //%note memory_2
724 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
725 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset));
726 assert(k == NULL || k->is_klass(), "type check");
727 return k;
728 }
729
730
731 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
732 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
733 java_class->metadata_field_put(_klass_offset, klass);
734 }
735
736
737 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
738 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
739 Symbol* name = NULL;
740 bool is_instance = false;
741 if (is_primitive(java_class)) {
742 name = vmSymbols::type_signature(primitive_type(java_class));
743 } else {
744 Klass* k = as_Klass(java_class);
745 is_instance = k->oop_is_instance();
746 name = k->name();
747 }
748 if (name == NULL) {
749 st->print("<null>");
750 return;
751 }
752 if (is_instance) st->print("L");
753 st->write((char*) name->base(), (int) name->utf8_length());
754 if (is_instance) st->print(";");
755 }
756
757 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) {
758 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
759 Symbol* name;
760 if (is_primitive(java_class)) {
761 name = vmSymbols::type_signature(primitive_type(java_class));
762 // Because this can create a new symbol, the caller has to decrement
763 // the refcount, so make adjustment here and below for symbols returned
764 // that are not created or incremented due to a successful lookup.
765 name->increment_refcount();
766 } else {
767 Klass* k = as_Klass(java_class);
768 if (!k->oop_is_instance()) {
769 name = k->name();
770 name->increment_refcount();
771 } else {
772 ResourceMark rm;
773 const char* sigstr = k->signature_name();
774 int siglen = (int) strlen(sigstr);
775 if (!intern_if_not_found) {
776 name = SymbolTable::probe(sigstr, siglen);
777 } else {
778 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
779 }
780 }
781 }
782 return name;
783 }
784
785
786 Klass* java_lang_Class::array_klass(oop java_class) {
787 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
788 assert(k == NULL || k->is_klass() && k->oop_is_array(), "should be array klass");
789 return k;
790 }
791
792
793 void java_lang_Class::set_array_klass(oop java_class, Klass* klass) {
794 assert(klass->is_klass() && klass->oop_is_array(), "should be array klass");
795 java_class->metadata_field_put(_array_klass_offset, klass);
796 }
797
798
799 bool java_lang_Class::is_primitive(oop java_class) {
800 // should assert:
801 //assert(java_lang_Class::is_instance(java_class), "must be a Class object");
802 bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL);
803
804 #ifdef ASSERT
805 if (is_primitive) {
806 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
807 assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()),
808 "Should be either the T_VOID primitive or a java primitive");
809 }
810 #endif
811
812 return is_primitive;
813 }
814
815
816 BasicType java_lang_Class::primitive_type(oop java_class) {
817 assert(java_lang_Class::is_primitive(java_class), "just checking");
818 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
819 BasicType type = T_VOID;
820 if (ak != NULL) {
821 // Note: create_basic_type_mirror above initializes ak to a non-null value.
822 type = ArrayKlass::cast(ak)->element_type();
823 } else {
824 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
825 }
826 assert(Universe::java_mirror(type) == java_class, "must be consistent");
827 return type;
828 }
829
830 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
831 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
832 if (is_primitive(java_class)) {
833 if (reference_klass != NULL)
834 (*reference_klass) = NULL;
835 return primitive_type(java_class);
836 } else {
837 if (reference_klass != NULL)
838 (*reference_klass) = as_Klass(java_class);
839 return T_OBJECT;
840 }
841 }
842
843
844 oop java_lang_Class::primitive_mirror(BasicType t) {
845 oop mirror = Universe::java_mirror(t);
846 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class");
847 assert(java_lang_Class::is_primitive(mirror), "must be primitive");
848 return mirror;
849 }
850
851 bool java_lang_Class::offsets_computed = false;
852 int java_lang_Class::classRedefinedCount_offset = -1;
853
854 void java_lang_Class::compute_offsets() {
855 assert(!offsets_computed, "offsets should be initialized only once");
856 offsets_computed = true;
857
858 Klass* klass_oop = SystemDictionary::Class_klass();
859 // The classRedefinedCount field is only present starting in 1.5,
860 // so don't go fatal.
861 compute_optional_offset(classRedefinedCount_offset,
862 klass_oop, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature());
863
864 // Needs to be optional because the old build runs Queens during bootstrapping
865 // and jdk8-9 doesn't have coordinated pushes yet.
866 compute_optional_offset(_class_loader_offset,
867 klass_oop, vmSymbols::classLoader_name(),
868 vmSymbols::classloader_signature());
869
870 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
871 }
872
873 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
874 if (!JDK_Version::is_gte_jdk15x_version()
875 || classRedefinedCount_offset == -1) {
876 // The classRedefinedCount field is only present starting in 1.5.
877 // If we don't have an offset for it then just return -1 as a marker.
878 return -1;
879 }
880
881 return the_class_mirror->int_field(classRedefinedCount_offset);
882 }
883
884 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
885 if (!JDK_Version::is_gte_jdk15x_version()
886 || classRedefinedCount_offset == -1) {
887 // The classRedefinedCount field is only present starting in 1.5.
888 // If we don't have an offset for it then nothing to set.
889 return;
890 }
891
892 the_class_mirror->int_field_put(classRedefinedCount_offset, value);
893 }
894
895
896 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
897 // platform thread structure, and a eetop offset which was used for thread
898 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
899 // merged, so in the HotSpot VM we just use the eetop field for the thread
900 // instead of the privateInfo_offset.
901 //
902 // Note: The stackSize field is only present starting in 1.4.
903
904 int java_lang_Thread::_name_offset = 0;
905 int java_lang_Thread::_group_offset = 0;
906 int java_lang_Thread::_contextClassLoader_offset = 0;
907 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
908 int java_lang_Thread::_priority_offset = 0;
909 int java_lang_Thread::_eetop_offset = 0;
910 int java_lang_Thread::_daemon_offset = 0;
911 int java_lang_Thread::_stillborn_offset = 0;
912 int java_lang_Thread::_stackSize_offset = 0;
913 int java_lang_Thread::_tid_offset = 0;
914 int java_lang_Thread::_thread_status_offset = 0;
915 int java_lang_Thread::_park_blocker_offset = 0;
916 int java_lang_Thread::_park_event_offset = 0 ;
917
918
919 void java_lang_Thread::compute_offsets() {
920 assert(_group_offset == 0, "offsets should be initialized only once");
921
922 Klass* k = SystemDictionary::Thread_klass();
923 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::char_array_signature());
924 compute_offset(_group_offset, k, vmSymbols::group_name(), vmSymbols::threadgroup_signature());
925 compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature());
926 compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature());
927 compute_offset(_priority_offset, k, vmSymbols::priority_name(), vmSymbols::int_signature());
928 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
929 compute_offset(_eetop_offset, k, vmSymbols::eetop_name(), vmSymbols::long_signature());
930 compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature());
931 // The stackSize field is only present starting in 1.4, so don't go fatal.
932 compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature());
933 // The tid and thread_status fields are only present starting in 1.5, so don't go fatal.
934 compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature());
935 compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature());
936 // The parkBlocker field is only present starting in 1.6, so don't go fatal.
937 compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature());
938 compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(),
939 vmSymbols::long_signature());
940 }
941
942
943 JavaThread* java_lang_Thread::thread(oop java_thread) {
944 return (JavaThread*)java_thread->address_field(_eetop_offset);
945 }
946
947
948 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
949 java_thread->address_field_put(_eetop_offset, (address)thread);
950 }
951
952
953 typeArrayOop java_lang_Thread::name(oop java_thread) {
954 oop name = java_thread->obj_field(_name_offset);
955 assert(name == NULL || (name->is_typeArray() && TypeArrayKlass::cast(name->klass())->element_type() == T_CHAR), "just checking");
956 return typeArrayOop(name);
957 }
958
959
960 void java_lang_Thread::set_name(oop java_thread, typeArrayOop name) {
961 assert(java_thread->obj_field(_name_offset) == NULL, "name should be NULL");
962 java_thread->obj_field_put(_name_offset, name);
963 }
964
965
966 ThreadPriority java_lang_Thread::priority(oop java_thread) {
967 return (ThreadPriority)java_thread->int_field(_priority_offset);
968 }
969
970
971 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
972 java_thread->int_field_put(_priority_offset, priority);
973 }
974
975
976 oop java_lang_Thread::threadGroup(oop java_thread) {
977 return java_thread->obj_field(_group_offset);
978 }
979
980
981 bool java_lang_Thread::is_stillborn(oop java_thread) {
982 return java_thread->bool_field(_stillborn_offset) != 0;
983 }
984
985
986 // We never have reason to turn the stillborn bit off
987 void java_lang_Thread::set_stillborn(oop java_thread) {
988 java_thread->bool_field_put(_stillborn_offset, true);
989 }
990
991
992 bool java_lang_Thread::is_alive(oop java_thread) {
993 JavaThread* thr = java_lang_Thread::thread(java_thread);
994 return (thr != NULL);
995 }
996
997
998 bool java_lang_Thread::is_daemon(oop java_thread) {
999 return java_thread->bool_field(_daemon_offset) != 0;
1000 }
1001
1002
1003 void java_lang_Thread::set_daemon(oop java_thread) {
1004 java_thread->bool_field_put(_daemon_offset, true);
1005 }
1006
1007 oop java_lang_Thread::context_class_loader(oop java_thread) {
1008 return java_thread->obj_field(_contextClassLoader_offset);
1009 }
1010
1011 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
1012 return java_thread->obj_field(_inheritedAccessControlContext_offset);
1013 }
1014
1015
1016 jlong java_lang_Thread::stackSize(oop java_thread) {
1017 // The stackSize field is only present starting in 1.4
1018 if (_stackSize_offset > 0) {
1019 assert(JDK_Version::is_gte_jdk14x_version(), "sanity check");
1020 return java_thread->long_field(_stackSize_offset);
1021 } else {
1022 return 0;
1023 }
1024 }
1025
1026 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1027 void java_lang_Thread::set_thread_status(oop java_thread,
1028 java_lang_Thread::ThreadStatus status) {
1029 // The threadStatus is only present starting in 1.5
1030 if (_thread_status_offset > 0) {
1031 java_thread->int_field_put(_thread_status_offset, status);
1032 }
1033 }
1034
1035 // Read thread status value from threadStatus field in java.lang.Thread java class.
1036 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1037 assert(Thread::current()->is_Watcher_thread() || Thread::current()->is_VM_thread() ||
1038 JavaThread::current()->thread_state() == _thread_in_vm,
1039 "Java Thread is not running in vm");
1040 // The threadStatus is only present starting in 1.5
1041 if (_thread_status_offset > 0) {
1042 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1043 } else {
1044 // All we can easily figure out is if it is alive, but that is
1045 // enough info for a valid unknown status.
1046 // These aren't restricted to valid set ThreadStatus values, so
1047 // use JVMTI values and cast.
1048 JavaThread* thr = java_lang_Thread::thread(java_thread);
1049 if (thr == NULL) {
1050 // the thread hasn't run yet or is in the process of exiting
1051 return NEW;
1052 }
1053 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE;
1054 }
1055 }
1056
1057
1058 jlong java_lang_Thread::thread_id(oop java_thread) {
1059 // The thread ID field is only present starting in 1.5
1060 if (_tid_offset > 0) {
1061 return java_thread->long_field(_tid_offset);
1062 } else {
1063 return 0;
1064 }
1065 }
1066
1067 oop java_lang_Thread::park_blocker(oop java_thread) {
1068 assert(JDK_Version::current().supports_thread_park_blocker() &&
1069 _park_blocker_offset != 0, "Must support parkBlocker field");
1070
1071 if (_park_blocker_offset > 0) {
1072 return java_thread->obj_field(_park_blocker_offset);
1073 }
1074
1075 return NULL;
1076 }
1077
1078 jlong java_lang_Thread::park_event(oop java_thread) {
1079 if (_park_event_offset > 0) {
1080 return java_thread->long_field(_park_event_offset);
1081 }
1082 return 0;
1083 }
1084
1085 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) {
1086 if (_park_event_offset > 0) {
1087 java_thread->long_field_put(_park_event_offset, ptr);
1088 return true;
1089 }
1090 return false;
1091 }
1092
1093
1094 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1095 assert(JDK_Version::is_gte_jdk15x_version() && _thread_status_offset != 0, "Must have thread status");
1096 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1097 switch (status) {
1098 case NEW : return "NEW";
1099 case RUNNABLE : return "RUNNABLE";
1100 case SLEEPING : return "TIMED_WAITING (sleeping)";
1101 case IN_OBJECT_WAIT : return "WAITING (on object monitor)";
1102 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
1103 case PARKED : return "WAITING (parking)";
1104 case PARKED_TIMED : return "TIMED_WAITING (parking)";
1105 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1106 case TERMINATED : return "TERMINATED";
1107 default : return "UNKNOWN";
1108 };
1109 }
1110 int java_lang_ThreadGroup::_parent_offset = 0;
1111 int java_lang_ThreadGroup::_name_offset = 0;
1112 int java_lang_ThreadGroup::_threads_offset = 0;
1113 int java_lang_ThreadGroup::_groups_offset = 0;
1114 int java_lang_ThreadGroup::_maxPriority_offset = 0;
1115 int java_lang_ThreadGroup::_destroyed_offset = 0;
1116 int java_lang_ThreadGroup::_daemon_offset = 0;
1117 int java_lang_ThreadGroup::_vmAllowSuspension_offset = 0;
1118 int java_lang_ThreadGroup::_nthreads_offset = 0;
1119 int java_lang_ThreadGroup::_ngroups_offset = 0;
1120
1121 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
1122 assert(java_thread_group->is_oop(), "thread group must be oop");
1123 return java_thread_group->obj_field(_parent_offset);
1124 }
1125
1126 // ("name as oop" accessor is not necessary)
1127
1128 typeArrayOop java_lang_ThreadGroup::name(oop java_thread_group) {
1129 oop name = java_thread_group->obj_field(_name_offset);
1130 // ThreadGroup.name can be null
1131 return name == NULL ? (typeArrayOop)NULL : java_lang_String::value(name);
1132 }
1133
1134 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
1135 assert(java_thread_group->is_oop(), "thread group must be oop");
1136 return java_thread_group->int_field(_nthreads_offset);
1137 }
1138
1139 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
1140 oop threads = java_thread_group->obj_field(_threads_offset);
1141 assert(threads != NULL, "threadgroups should have threads");
1142 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
1143 return objArrayOop(threads);
1144 }
1145
1146 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
1147 assert(java_thread_group->is_oop(), "thread group must be oop");
1148 return java_thread_group->int_field(_ngroups_offset);
1149 }
1150
1151 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
1152 oop groups = java_thread_group->obj_field(_groups_offset);
1153 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
1154 return objArrayOop(groups);
1155 }
1156
1157 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1158 assert(java_thread_group->is_oop(), "thread group must be oop");
1159 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1160 }
1161
1162 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
1163 assert(java_thread_group->is_oop(), "thread group must be oop");
1164 return java_thread_group->bool_field(_destroyed_offset) != 0;
1165 }
1166
1167 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1168 assert(java_thread_group->is_oop(), "thread group must be oop");
1169 return java_thread_group->bool_field(_daemon_offset) != 0;
1170 }
1171
1172 bool java_lang_ThreadGroup::is_vmAllowSuspension(oop java_thread_group) {
1173 assert(java_thread_group->is_oop(), "thread group must be oop");
1174 return java_thread_group->bool_field(_vmAllowSuspension_offset) != 0;
1175 }
1176
1177 void java_lang_ThreadGroup::compute_offsets() {
1178 assert(_parent_offset == 0, "offsets should be initialized only once");
1179
1180 Klass* k = SystemDictionary::ThreadGroup_klass();
1181
1182 compute_offset(_parent_offset, k, vmSymbols::parent_name(), vmSymbols::threadgroup_signature());
1183 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1184 compute_offset(_threads_offset, k, vmSymbols::threads_name(), vmSymbols::thread_array_signature());
1185 compute_offset(_groups_offset, k, vmSymbols::groups_name(), vmSymbols::threadgroup_array_signature());
1186 compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature());
1187 compute_offset(_destroyed_offset, k, vmSymbols::destroyed_name(), vmSymbols::bool_signature());
1188 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
1189 compute_offset(_vmAllowSuspension_offset, k, vmSymbols::vmAllowSuspension_name(), vmSymbols::bool_signature());
1190 compute_offset(_nthreads_offset, k, vmSymbols::nthreads_name(), vmSymbols::int_signature());
1191 compute_offset(_ngroups_offset, k, vmSymbols::ngroups_name(), vmSymbols::int_signature());
1192 }
1193
1194 oop java_lang_Throwable::unassigned_stacktrace() {
1195 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Throwable_klass());
1196 address addr = ik->static_field_addr(static_unassigned_stacktrace_offset);
1197 if (UseCompressedOops) {
1198 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
1199 } else {
1200 return oopDesc::load_decode_heap_oop((oop*)addr);
1201 }
1202 }
1203
1204 oop java_lang_Throwable::backtrace(oop throwable) {
1205 return throwable->obj_field_acquire(backtrace_offset);
1206 }
1207
1208
1209 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
1210 throwable->release_obj_field_put(backtrace_offset, value);
1211 }
1212
1213
1214 oop java_lang_Throwable::message(oop throwable) {
1215 return throwable->obj_field(detailMessage_offset);
1216 }
1217
1218
1219 oop java_lang_Throwable::message(Handle throwable) {
1220 return throwable->obj_field(detailMessage_offset);
1221 }
1222
1223
1224 void java_lang_Throwable::set_message(oop throwable, oop value) {
1225 throwable->obj_field_put(detailMessage_offset, value);
1226 }
1227
1228
1229 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
1230 throwable->obj_field_put(stackTrace_offset, st_element_array);
1231 }
1232
1233 void java_lang_Throwable::clear_stacktrace(oop throwable) {
1234 assert(JDK_Version::is_gte_jdk14x_version(), "should only be called in >= 1.4");
1235 set_stacktrace(throwable, NULL);
1236 }
1237
1238
1239 void java_lang_Throwable::print(oop throwable, outputStream* st) {
1240 ResourceMark rm;
1241 Klass* k = throwable->klass();
1242 assert(k != NULL, "just checking");
1243 st->print("%s", InstanceKlass::cast(k)->external_name());
1244 oop msg = message(throwable);
1245 if (msg != NULL) {
1246 st->print(": %s", java_lang_String::as_utf8_string(msg));
1247 }
1248 }
1249
1250
1251 void java_lang_Throwable::print(Handle throwable, outputStream* st) {
1252 ResourceMark rm;
1253 Klass* k = throwable->klass();
1254 assert(k != NULL, "just checking");
1255 st->print("%s", InstanceKlass::cast(k)->external_name());
1256 oop msg = message(throwable);
1257 if (msg != NULL) {
1258 st->print(": %s", java_lang_String::as_utf8_string(msg));
1259 }
1260 }
1261
1262 // After this many redefines, the stack trace is unreliable.
1263 const int MAX_VERSION = USHRT_MAX;
1264
1265 // Helper backtrace functions to store bci|version together.
1266 static inline int merge_bci_and_version(int bci, int version) {
1267 // only store u2 for version, checking for overflow.
1268 if (version > USHRT_MAX || version < 0) version = MAX_VERSION;
1269 assert((jushort)bci == bci, "bci should be short");
1270 return build_int_from_shorts(version, bci);
1271 }
1272
1273 static inline int bci_at(unsigned int merged) {
1274 return extract_high_short_from_int(merged);
1275 }
1276 static inline int version_at(unsigned int merged) {
1277 return extract_low_short_from_int(merged);
1278 }
1279
1280 static inline bool version_matches(Method* method, int version) {
1281 return (method->constants()->version() == version && version < MAX_VERSION);
1282 }
1283
1284 static inline int get_line_number(Method* method, int bci) {
1285 int line_number = 0;
1286 if (method->is_native()) {
1287 // Negative value different from -1 below, enabling Java code in
1288 // class java.lang.StackTraceElement to distinguish "native" from
1289 // "no LineNumberTable". JDK tests for -2.
1290 line_number = -2;
1291 } else {
1292 // Returns -1 if no LineNumberTable, and otherwise actual line number
1293 line_number = method->line_number_from_bci(bci);
1294 if (line_number == -1 && ShowHiddenFrames) {
1295 line_number = bci + 1000000;
1296 }
1297 }
1298 return line_number;
1299 }
1300
1301 // This class provides a simple wrapper over the internal structure of
1302 // exception backtrace to insulate users of the backtrace from needing
1303 // to know what it looks like.
1304 class BacktraceBuilder: public StackObj {
1305 private:
1306 Handle _backtrace;
1307 objArrayOop _head;
1308 typeArrayOop _methods;
1309 typeArrayOop _bcis;
1310 objArrayOop _mirrors;
1311 int _index;
1312 No_Safepoint_Verifier _nsv;
1313
1314 public:
1315
1316 enum {
1317 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
1318 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
1319 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
1320 trace_next_offset = java_lang_Throwable::trace_next_offset,
1321 trace_size = java_lang_Throwable::trace_size,
1322 trace_chunk_size = java_lang_Throwable::trace_chunk_size
1323 };
1324
1325 // get info out of chunks
1326 static typeArrayOop get_methods(objArrayHandle chunk) {
1327 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
1328 assert(methods != NULL, "method array should be initialized in backtrace");
1329 return methods;
1330 }
1331 static typeArrayOop get_bcis(objArrayHandle chunk) {
1332 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1333 assert(bcis != NULL, "bci array should be initialized in backtrace");
1334 return bcis;
1335 }
1336 static objArrayOop get_mirrors(objArrayHandle chunk) {
1337 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
1338 assert(mirrors != NULL, "mirror array should be initialized in backtrace");
1339 return mirrors;
1340 }
1341
1342 // constructor for new backtrace
1343 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _mirrors(NULL) {
1344 expand(CHECK);
1345 _backtrace = _head;
1346 _index = 0;
1347 }
1348
1349 BacktraceBuilder(objArrayHandle backtrace) {
1350 _methods = get_methods(backtrace);
1351 _bcis = get_bcis(backtrace);
1352 _mirrors = get_mirrors(backtrace);
1353 assert(_methods->length() == _bcis->length() &&
1354 _methods->length() == _mirrors->length(),
1355 "method and source information arrays should match");
1356
1357 // head is the preallocated backtrace
1358 _backtrace = _head = backtrace();
1359 _index = 0;
1360 }
1361
1362 void expand(TRAPS) {
1363 objArrayHandle old_head(THREAD, _head);
1364 Pause_No_Safepoint_Verifier pnsv(&_nsv);
1365
1366 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
1367 objArrayHandle new_head(THREAD, head);
1368
1369 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1370 typeArrayHandle new_methods(THREAD, methods);
1371
1372 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
1373 typeArrayHandle new_bcis(THREAD, bcis);
1374
1375 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
1376 objArrayHandle new_mirrors(THREAD, mirrors);
1377
1378 if (!old_head.is_null()) {
1379 old_head->obj_at_put(trace_next_offset, new_head());
1380 }
1381 new_head->obj_at_put(trace_methods_offset, new_methods());
1382 new_head->obj_at_put(trace_bcis_offset, new_bcis());
1383 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
1384
1385 _head = new_head();
1386 _methods = new_methods();
1387 _bcis = new_bcis();
1388 _mirrors = new_mirrors();
1389 _index = 0;
1390 }
1391
1392 oop backtrace() {
1393 return _backtrace();
1394 }
1395
1396 inline void push(Method* method, int bci, TRAPS) {
1397 // Smear the -1 bci to 0 since the array only holds unsigned
1398 // shorts. The later line number lookup would just smear the -1
1399 // to a 0 even if it could be recorded.
1400 if (bci == SynchronizationEntryBCI) bci = 0;
1401
1402 if (_index >= trace_chunk_size) {
1403 methodHandle mhandle(THREAD, method);
1404 expand(CHECK);
1405 method = mhandle();
1406 }
1407
1408 _methods->short_at_put(_index, method->method_idnum());
1409 _bcis->int_at_put(_index, merge_bci_and_version(bci, method->constants()->version()));
1410
1411 // We need to save the mirrors in the backtrace to keep the class
1412 // from being unloaded while we still have this stack trace.
1413 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror");
1414 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
1415 _index++;
1416 }
1417
1418 };
1419
1420 // Print stack trace element to resource allocated buffer
1421 char* java_lang_Throwable::print_stack_element_to_buffer(Handle mirror,
1422 int method_id, int version, int bci) {
1423
1424 // Get strings and string lengths
1425 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
1426 const char* klass_name = holder->external_name();
1427 int buf_len = (int)strlen(klass_name);
1428
1429 // The method id may point to an obsolete method, can't get more stack information
1430 Method* method = holder->method_with_idnum(method_id);
1431 if (method == NULL) {
1432 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
1433 // This is what the java code prints in this case - added Redefined
1434 sprintf(buf, "\tat %s.null (Redefined)", klass_name);
1435 return buf;
1436 }
1437
1438 char* method_name = method->name()->as_C_string();
1439 buf_len += (int)strlen(method_name);
1440
1441 char* source_file_name = NULL;
1442 if (version_matches(method, version)) {
1443 Symbol* source = holder->source_file_name();
1444 if (source != NULL) {
1445 source_file_name = source->as_C_string();
1446 buf_len += (int)strlen(source_file_name);
1447 }
1448 }
1449
1450 // Allocate temporary buffer with extra space for formatting and line number
1451 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
1452
1453 // Print stack trace line in buffer
1454 sprintf(buf, "\tat %s.%s", klass_name, method_name);
1455
1456 if (!version_matches(method, version)) {
1457 strcat(buf, "(Redefined)");
1458 } else {
1459 int line_number = get_line_number(method, bci);
1460 if (line_number == -2) {
1461 strcat(buf, "(Native Method)");
1462 } else {
1463 if (source_file_name != NULL && (line_number != -1)) {
1464 // Sourcename and linenumber
1465 sprintf(buf + (int)strlen(buf), "(%s:%d)", source_file_name, line_number);
1466 } else if (source_file_name != NULL) {
1467 // Just sourcename
1468 sprintf(buf + (int)strlen(buf), "(%s)", source_file_name);
1469 } else {
1470 // Neither sourcename nor linenumber
1471 sprintf(buf + (int)strlen(buf), "(Unknown Source)");
1472 }
1473 nmethod* nm = method->code();
1474 if (WizardMode && nm != NULL) {
1475 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
1476 }
1477 }
1478 }
1479
1480 return buf;
1481 }
1482
1483 void java_lang_Throwable::print_stack_element(outputStream *st, Handle mirror,
1484 int method_id, int version, int bci) {
1485 ResourceMark rm;
1486 char* buf = print_stack_element_to_buffer(mirror, method_id, version, bci);
1487 st->print_cr("%s", buf);
1488 }
1489
1490 void java_lang_Throwable::print_stack_element(outputStream *st, methodHandle method, int bci) {
1491 Handle mirror = method->method_holder()->java_mirror();
1492 int method_id = method->method_idnum();
1493 int version = method->constants()->version();
1494 print_stack_element(st, mirror, method_id, version, bci);
1495 }
1496
1497 const char* java_lang_Throwable::no_stack_trace_message() {
1498 return "\t<<no stack trace available>>";
1499 }
1500
1501
1502 // Currently used only for exceptions occurring during startup
1503 void java_lang_Throwable::print_stack_trace(oop throwable, outputStream* st) {
1504 Thread *THREAD = Thread::current();
1505 Handle h_throwable(THREAD, throwable);
1506 while (h_throwable.not_null()) {
1507 objArrayHandle result (THREAD, objArrayOop(backtrace(h_throwable())));
1508 if (result.is_null()) {
1509 st->print_cr("%s", no_stack_trace_message());
1510 return;
1511 }
1512
1513 while (result.not_null()) {
1514
1515 // Get method id, bci, version and mirror from chunk
1516 typeArrayHandle methods (THREAD, BacktraceBuilder::get_methods(result));
1517 typeArrayHandle bcis (THREAD, BacktraceBuilder::get_bcis(result));
1518 objArrayHandle mirrors (THREAD, BacktraceBuilder::get_mirrors(result));
1519
1520 int length = methods()->length();
1521 for (int index = 0; index < length; index++) {
1522 Handle mirror(THREAD, mirrors->obj_at(index));
1523 // NULL mirror means end of stack trace
1524 if (mirror.is_null()) goto handle_cause;
1525 int method = methods->short_at(index);
1526 int version = version_at(bcis->int_at(index));
1527 int bci = bci_at(bcis->int_at(index));
1528 print_stack_element(st, mirror, method, version, bci);
1529 }
1530 result = objArrayHandle(THREAD, objArrayOop(result->obj_at(trace_next_offset)));
1531 }
1532 handle_cause:
1533 {
1534 EXCEPTION_MARK;
1535 JavaValue cause(T_OBJECT);
1536 JavaCalls::call_virtual(&cause,
1537 h_throwable,
1538 KlassHandle(THREAD, h_throwable->klass()),
1539 vmSymbols::getCause_name(),
1540 vmSymbols::void_throwable_signature(),
1541 THREAD);
1542 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
1543 if (HAS_PENDING_EXCEPTION) {
1544 CLEAR_PENDING_EXCEPTION;
1545 h_throwable = Handle();
1546 } else {
1547 h_throwable = Handle(THREAD, (oop) cause.get_jobject());
1548 if (h_throwable.not_null()) {
1549 st->print("Caused by: ");
1550 print(h_throwable, st);
1551 st->cr();
1552 }
1553 }
1554 }
1555 }
1556 }
1557
1558 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method, TRAPS) {
1559 if (!StackTraceInThrowable) return;
1560 ResourceMark rm(THREAD);
1561
1562 // Start out by clearing the backtrace for this object, in case the VM
1563 // runs out of memory while allocating the stack trace
1564 set_backtrace(throwable(), NULL);
1565 if (JDK_Version::is_gte_jdk14x_version()) {
1566 // New since 1.4, clear lazily constructed Java level stacktrace if
1567 // refilling occurs
1568 // This is unnecessary in 1.7+ but harmless
1569 clear_stacktrace(throwable());
1570 }
1571
1572 int max_depth = MaxJavaStackTraceDepth;
1573 JavaThread* thread = (JavaThread*)THREAD;
1574 BacktraceBuilder bt(CHECK);
1575
1576 // If there is no Java frame just return the method that was being called
1577 // with bci 0
1578 if (!thread->has_last_Java_frame()) {
1579 if (max_depth >= 1 && method() != NULL) {
1580 bt.push(method(), 0, CHECK);
1581 set_backtrace(throwable(), bt.backtrace());
1582 }
1583 return;
1584 }
1585
1586 // Instead of using vframe directly, this version of fill_in_stack_trace
1587 // basically handles everything by hand. This significantly improved the
1588 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
1589 // See bug 6333838 for more details.
1590 // The "ASSERT" here is to verify this method generates the exactly same stack
1591 // trace as utilizing vframe.
1592 #ifdef ASSERT
1593 vframeStream st(thread);
1594 methodHandle st_method(THREAD, st.method());
1595 #endif
1596 int total_count = 0;
1597 RegisterMap map(thread, false);
1598 int decode_offset = 0;
1599 nmethod* nm = NULL;
1600 bool skip_fillInStackTrace_check = false;
1601 bool skip_throwableInit_check = false;
1602 bool skip_hidden = !ShowHiddenFrames;
1603
1604 for (frame fr = thread->last_frame(); max_depth != total_count;) {
1605 Method* method = NULL;
1606 int bci = 0;
1607
1608 // Compiled java method case.
1609 if (decode_offset != 0) {
1610 DebugInfoReadStream stream(nm, decode_offset);
1611 decode_offset = stream.read_int();
1612 method = (Method*)nm->metadata_at(stream.read_int());
1613 bci = stream.read_bci();
1614 } else {
1615 if (fr.is_first_frame()) break;
1616 address pc = fr.pc();
1617 if (fr.is_interpreted_frame()) {
1618 intptr_t bcx = fr.interpreter_frame_bcx();
1619 method = fr.interpreter_frame_method();
1620 bci = fr.is_bci(bcx) ? bcx : method->bci_from((address)bcx);
1621 fr = fr.sender(&map);
1622 } else {
1623 CodeBlob* cb = fr.cb();
1624 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
1625 // but non nmethod
1626 fr = fr.sender(&map);
1627 if (cb == NULL || !cb->is_nmethod()) {
1628 continue;
1629 }
1630 nm = (nmethod*)cb;
1631 if (nm->method()->is_native()) {
1632 method = nm->method();
1633 bci = 0;
1634 } else {
1635 PcDesc* pd = nm->pc_desc_at(pc);
1636 decode_offset = pd->scope_decode_offset();
1637 // if decode_offset is not equal to 0, it will execute the
1638 // "compiled java method case" at the beginning of the loop.
1639 continue;
1640 }
1641 }
1642 }
1643 #ifdef ASSERT
1644 assert(st_method() == method && st.bci() == bci,
1645 "Wrong stack trace");
1646 st.next();
1647 // vframeStream::method isn't GC-safe so store off a copy
1648 // of the Method* in case we GC.
1649 if (!st.at_end()) {
1650 st_method = st.method();
1651 }
1652 #endif
1653
1654 // the format of the stacktrace will be:
1655 // - 1 or more fillInStackTrace frames for the exception class (skipped)
1656 // - 0 or more <init> methods for the exception class (skipped)
1657 // - rest of the stack
1658
1659 if (!skip_fillInStackTrace_check) {
1660 if ((method->name() == vmSymbols::fillInStackTrace_name() ||
1661 method->name() == vmSymbols::fillInStackTrace0_name()) &&
1662 throwable->is_a(method->method_holder())) {
1663 continue;
1664 }
1665 else {
1666 skip_fillInStackTrace_check = true; // gone past them all
1667 }
1668 }
1669 if (!skip_throwableInit_check) {
1670 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
1671
1672 // skip <init> methods of the exception class and superclasses
1673 // This is simlar to classic VM.
1674 if (method->name() == vmSymbols::object_initializer_name() &&
1675 throwable->is_a(method->method_holder())) {
1676 continue;
1677 } else {
1678 // there are none or we've seen them all - either way stop checking
1679 skip_throwableInit_check = true;
1680 }
1681 }
1682 if (method->is_hidden()) {
1683 if (skip_hidden) continue;
1684 }
1685 bt.push(method, bci, CHECK);
1686 total_count++;
1687 }
1688
1689 // Put completed stack trace into throwable object
1690 set_backtrace(throwable(), bt.backtrace());
1691 }
1692
1693 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method) {
1694 // No-op if stack trace is disabled
1695 if (!StackTraceInThrowable) {
1696 return;
1697 }
1698
1699 // Disable stack traces for some preallocated out of memory errors
1700 if (!Universe::should_fill_in_stack_trace(throwable)) {
1701 return;
1702 }
1703
1704 PRESERVE_EXCEPTION_MARK;
1705
1706 JavaThread* thread = JavaThread::active();
1707 fill_in_stack_trace(throwable, method, thread);
1708 // ignore exceptions thrown during stack trace filling
1709 CLEAR_PENDING_EXCEPTION;
1710 }
1711
1712 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
1713 // Allocate stack trace - backtrace is created but not filled in
1714
1715 // No-op if stack trace is disabled
1716 if (!StackTraceInThrowable) return;
1717 BacktraceBuilder bt(CHECK); // creates a backtrace
1718 set_backtrace(throwable(), bt.backtrace());
1719 }
1720
1721
1722 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
1723 // Fill in stack trace into preallocated backtrace (no GC)
1724
1725 // No-op if stack trace is disabled
1726 if (!StackTraceInThrowable) return;
1727
1728 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
1729
1730 JavaThread* THREAD = JavaThread::current();
1731
1732 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
1733 assert(backtrace.not_null(), "backtrace should have been preallocated");
1734
1735 ResourceMark rm(THREAD);
1736 vframeStream st(THREAD);
1737
1738 BacktraceBuilder bt(backtrace);
1739
1740 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
1741 // methods as preallocated errors aren't created by "java" code.
1742
1743 // fill in as much stack trace as possible
1744 typeArrayOop methods = BacktraceBuilder::get_methods(backtrace);
1745 int max_chunks = MIN2(methods->length(), (int)MaxJavaStackTraceDepth);
1746 int chunk_count = 0;
1747
1748 for (;!st.at_end(); st.next()) {
1749 bt.push(st.method(), st.bci(), CHECK);
1750 chunk_count++;
1751
1752 // Bail-out for deep stacks
1753 if (chunk_count >= max_chunks) break;
1754 }
1755
1756 // For Java 7+ we support the Throwable immutability protocol defined for Java 7. This support
1757 // was missing in 7u0 so in 7u0 there is a workaround in the Throwable class. That workaround
1758 // can be removed in a JDK using this JVM version
1759 if (JDK_Version::is_gte_jdk17x_version()) {
1760 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
1761 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized");
1762 }
1763 }
1764
1765
1766 int java_lang_Throwable::get_stack_trace_depth(oop throwable, TRAPS) {
1767 if (throwable == NULL) {
1768 THROW_0(vmSymbols::java_lang_NullPointerException());
1769 }
1770 objArrayOop chunk = objArrayOop(backtrace(throwable));
1771 int depth = 0;
1772 if (chunk != NULL) {
1773 // Iterate over chunks and count full ones
1774 while (true) {
1775 objArrayOop next = objArrayOop(chunk->obj_at(trace_next_offset));
1776 if (next == NULL) break;
1777 depth += trace_chunk_size;
1778 chunk = next;
1779 }
1780 assert(chunk != NULL && chunk->obj_at(trace_next_offset) == NULL, "sanity check");
1781 // Count element in remaining partial chunk. NULL value for mirror
1782 // marks the end of the stack trace elements that are saved.
1783 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk);
1784 assert(mirrors != NULL, "sanity check");
1785 for (int i = 0; i < mirrors->length(); i++) {
1786 if (mirrors->obj_at(i) == NULL) break;
1787 depth++;
1788 }
1789 }
1790 return depth;
1791 }
1792
1793
1794 oop java_lang_Throwable::get_stack_trace_element(oop throwable, int index, TRAPS) {
1795 if (throwable == NULL) {
1796 THROW_0(vmSymbols::java_lang_NullPointerException());
1797 }
1798 if (index < 0) {
1799 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1800 }
1801 // Compute how many chunks to skip and index into actual chunk
1802 objArrayOop chunk = objArrayOop(backtrace(throwable));
1803 int skip_chunks = index / trace_chunk_size;
1804 int chunk_index = index % trace_chunk_size;
1805 while (chunk != NULL && skip_chunks > 0) {
1806 chunk = objArrayOop(chunk->obj_at(trace_next_offset));
1807 skip_chunks--;
1808 }
1809 if (chunk == NULL) {
1810 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1811 }
1812 // Get method id, bci, version and mirror from chunk
1813 typeArrayOop methods = BacktraceBuilder::get_methods(chunk);
1814 typeArrayOop bcis = BacktraceBuilder::get_bcis(chunk);
1815 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk);
1816
1817 assert(methods != NULL && bcis != NULL && mirrors != NULL, "sanity check");
1818
1819 int method = methods->short_at(chunk_index);
1820 int version = version_at(bcis->int_at(chunk_index));
1821 int bci = bci_at(bcis->int_at(chunk_index));
1822 Handle mirror(THREAD, mirrors->obj_at(chunk_index));
1823
1824 // Chunk can be partial full
1825 if (mirror.is_null()) {
1826 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1827 }
1828
1829 oop element = java_lang_StackTraceElement::create(mirror, method, version, bci, CHECK_0);
1830 return element;
1831 }
1832
1833 oop java_lang_StackTraceElement::create(Handle mirror, int method_id,
1834 int version, int bci, TRAPS) {
1835 // Allocate java.lang.StackTraceElement instance
1836 Klass* k = SystemDictionary::StackTraceElement_klass();
1837 assert(k != NULL, "must be loaded in 1.4+");
1838 instanceKlassHandle ik (THREAD, k);
1839 if (ik->should_be_initialized()) {
1840 ik->initialize(CHECK_0);
1841 }
1842
1843 Handle element = ik->allocate_instance_handle(CHECK_0);
1844 // Fill in class name
1845 ResourceMark rm(THREAD);
1846 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
1847 const char* str = holder->external_name();
1848 oop classname = StringTable::intern((char*) str, CHECK_0);
1849 java_lang_StackTraceElement::set_declaringClass(element(), classname);
1850
1851 Method* method = holder->method_with_idnum(method_id);
1852 // Method on stack may be obsolete because it was redefined so cannot be
1853 // found by idnum.
1854 if (method == NULL) {
1855 // leave name and fileName null
1856 java_lang_StackTraceElement::set_lineNumber(element(), -1);
1857 return element();
1858 }
1859
1860 // Fill in method name
1861 oop methodname = StringTable::intern(method->name(), CHECK_0);
1862 java_lang_StackTraceElement::set_methodName(element(), methodname);
1863
1864 if (!version_matches(method, version)) {
1865 // The method was redefined, accurate line number information isn't available
1866 java_lang_StackTraceElement::set_fileName(element(), NULL);
1867 java_lang_StackTraceElement::set_lineNumber(element(), -1);
1868 } else {
1869 // Fill in source file name and line number.
1870 Symbol* source = holder->source_file_name();
1871 if (ShowHiddenFrames && source == NULL)
1872 source = vmSymbols::unknown_class_name();
1873 oop filename = StringTable::intern(source, CHECK_0);
1874 java_lang_StackTraceElement::set_fileName(element(), filename);
1875
1876 int line_number = get_line_number(method, bci);
1877 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
1878 }
1879 return element();
1880 }
1881
1882 oop java_lang_StackTraceElement::create(methodHandle method, int bci, TRAPS) {
1883 Handle mirror (THREAD, method->method_holder()->java_mirror());
1884 int method_id = method->method_idnum();
1885 return create(mirror, method_id, method->constants()->version(), bci, THREAD);
1886 }
1887
1888 void java_lang_reflect_AccessibleObject::compute_offsets() {
1889 Klass* k = SystemDictionary::reflect_AccessibleObject_klass();
1890 compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature());
1891 }
1892
1893 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
1894 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1895 return (jboolean) reflect->bool_field(override_offset);
1896 }
1897
1898 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
1899 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1900 reflect->bool_field_put(override_offset, (int) value);
1901 }
1902
1903 void java_lang_reflect_Method::compute_offsets() {
1904 Klass* k = SystemDictionary::reflect_Method_klass();
1905 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
1906 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1907 compute_offset(returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature());
1908 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
1909 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
1910 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
1911 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
1912 // The generic signature and annotations fields are only present in 1.5
1913 signature_offset = -1;
1914 annotations_offset = -1;
1915 parameter_annotations_offset = -1;
1916 annotation_default_offset = -1;
1917 type_annotations_offset = -1;
1918 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
1919 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
1920 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
1921 compute_optional_offset(annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature());
1922 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
1923 }
1924
1925 Handle java_lang_reflect_Method::create(TRAPS) {
1926 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1927 Klass* klass = SystemDictionary::reflect_Method_klass();
1928 // This class is eagerly initialized during VM initialization, since we keep a refence
1929 // to one of the methods
1930 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
1931 return InstanceKlass::cast(klass)->allocate_instance_handle(CHECK_NH);
1932 }
1933
1934 oop java_lang_reflect_Method::clazz(oop reflect) {
1935 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1936 return reflect->obj_field(clazz_offset);
1937 }
1938
1939 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
1940 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1941 reflect->obj_field_put(clazz_offset, value);
1942 }
1943
1944 int java_lang_reflect_Method::slot(oop reflect) {
1945 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1946 return reflect->int_field(slot_offset);
1947 }
1948
1949 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
1950 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1951 reflect->int_field_put(slot_offset, value);
1952 }
1953
1954 oop java_lang_reflect_Method::name(oop method) {
1955 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1956 return method->obj_field(name_offset);
1957 }
1958
1959 void java_lang_reflect_Method::set_name(oop method, oop value) {
1960 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1961 method->obj_field_put(name_offset, value);
1962 }
1963
1964 oop java_lang_reflect_Method::return_type(oop method) {
1965 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1966 return method->obj_field(returnType_offset);
1967 }
1968
1969 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
1970 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1971 method->obj_field_put(returnType_offset, value);
1972 }
1973
1974 oop java_lang_reflect_Method::parameter_types(oop method) {
1975 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1976 return method->obj_field(parameterTypes_offset);
1977 }
1978
1979 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
1980 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1981 method->obj_field_put(parameterTypes_offset, value);
1982 }
1983
1984 oop java_lang_reflect_Method::exception_types(oop method) {
1985 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1986 return method->obj_field(exceptionTypes_offset);
1987 }
1988
1989 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
1990 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1991 method->obj_field_put(exceptionTypes_offset, value);
1992 }
1993
1994 int java_lang_reflect_Method::modifiers(oop method) {
1995 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1996 return method->int_field(modifiers_offset);
1997 }
1998
1999 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
2000 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2001 method->int_field_put(modifiers_offset, value);
2002 }
2003
2004 bool java_lang_reflect_Method::has_signature_field() {
2005 return (signature_offset >= 0);
2006 }
2007
2008 oop java_lang_reflect_Method::signature(oop method) {
2009 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2010 assert(has_signature_field(), "signature field must be present");
2011 return method->obj_field(signature_offset);
2012 }
2013
2014 void java_lang_reflect_Method::set_signature(oop method, oop value) {
2015 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2016 assert(has_signature_field(), "signature field must be present");
2017 method->obj_field_put(signature_offset, value);
2018 }
2019
2020 bool java_lang_reflect_Method::has_annotations_field() {
2021 return (annotations_offset >= 0);
2022 }
2023
2024 oop java_lang_reflect_Method::annotations(oop method) {
2025 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2026 assert(has_annotations_field(), "annotations field must be present");
2027 return method->obj_field(annotations_offset);
2028 }
2029
2030 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
2031 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2032 assert(has_annotations_field(), "annotations field must be present");
2033 method->obj_field_put(annotations_offset, value);
2034 }
2035
2036 bool java_lang_reflect_Method::has_parameter_annotations_field() {
2037 return (parameter_annotations_offset >= 0);
2038 }
2039
2040 oop java_lang_reflect_Method::parameter_annotations(oop method) {
2041 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2042 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2043 return method->obj_field(parameter_annotations_offset);
2044 }
2045
2046 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
2047 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2048 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2049 method->obj_field_put(parameter_annotations_offset, value);
2050 }
2051
2052 bool java_lang_reflect_Method::has_annotation_default_field() {
2053 return (annotation_default_offset >= 0);
2054 }
2055
2056 oop java_lang_reflect_Method::annotation_default(oop method) {
2057 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2058 assert(has_annotation_default_field(), "annotation default field must be present");
2059 return method->obj_field(annotation_default_offset);
2060 }
2061
2062 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
2063 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2064 assert(has_annotation_default_field(), "annotation default field must be present");
2065 method->obj_field_put(annotation_default_offset, value);
2066 }
2067
2068 bool java_lang_reflect_Method::has_type_annotations_field() {
2069 return (type_annotations_offset >= 0);
2070 }
2071
2072 oop java_lang_reflect_Method::type_annotations(oop method) {
2073 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2074 assert(has_type_annotations_field(), "type_annotations field must be present");
2075 return method->obj_field(type_annotations_offset);
2076 }
2077
2078 void java_lang_reflect_Method::set_type_annotations(oop method, oop value) {
2079 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2080 assert(has_type_annotations_field(), "type_annotations field must be present");
2081 method->obj_field_put(type_annotations_offset, value);
2082 }
2083
2084 void java_lang_reflect_Constructor::compute_offsets() {
2085 Klass* k = SystemDictionary::reflect_Constructor_klass();
2086 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
2087 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
2088 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
2089 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
2090 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2091 // The generic signature and annotations fields are only present in 1.5
2092 signature_offset = -1;
2093 annotations_offset = -1;
2094 parameter_annotations_offset = -1;
2095 type_annotations_offset = -1;
2096 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
2097 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
2098 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
2099 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
2100 }
2101
2102 Handle java_lang_reflect_Constructor::create(TRAPS) {
2103 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2104 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
2105 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2106 instanceKlassHandle klass (THREAD, k);
2107 // Ensure it is initialized
2108 klass->initialize(CHECK_NH);
2109 return klass->allocate_instance_handle(CHECK_NH);
2110 }
2111
2112 oop java_lang_reflect_Constructor::clazz(oop reflect) {
2113 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2114 return reflect->obj_field(clazz_offset);
2115 }
2116
2117 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
2118 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2119 reflect->obj_field_put(clazz_offset, value);
2120 }
2121
2122 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
2123 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2124 return constructor->obj_field(parameterTypes_offset);
2125 }
2126
2127 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
2128 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2129 constructor->obj_field_put(parameterTypes_offset, value);
2130 }
2131
2132 oop java_lang_reflect_Constructor::exception_types(oop constructor) {
2133 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2134 return constructor->obj_field(exceptionTypes_offset);
2135 }
2136
2137 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
2138 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2139 constructor->obj_field_put(exceptionTypes_offset, value);
2140 }
2141
2142 int java_lang_reflect_Constructor::slot(oop reflect) {
2143 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2144 return reflect->int_field(slot_offset);
2145 }
2146
2147 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
2148 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2149 reflect->int_field_put(slot_offset, value);
2150 }
2151
2152 int java_lang_reflect_Constructor::modifiers(oop constructor) {
2153 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2154 return constructor->int_field(modifiers_offset);
2155 }
2156
2157 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
2158 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2159 constructor->int_field_put(modifiers_offset, value);
2160 }
2161
2162 bool java_lang_reflect_Constructor::has_signature_field() {
2163 return (signature_offset >= 0);
2164 }
2165
2166 oop java_lang_reflect_Constructor::signature(oop constructor) {
2167 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2168 assert(has_signature_field(), "signature field must be present");
2169 return constructor->obj_field(signature_offset);
2170 }
2171
2172 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
2173 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2174 assert(has_signature_field(), "signature field must be present");
2175 constructor->obj_field_put(signature_offset, value);
2176 }
2177
2178 bool java_lang_reflect_Constructor::has_annotations_field() {
2179 return (annotations_offset >= 0);
2180 }
2181
2182 oop java_lang_reflect_Constructor::annotations(oop constructor) {
2183 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2184 assert(has_annotations_field(), "annotations field must be present");
2185 return constructor->obj_field(annotations_offset);
2186 }
2187
2188 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
2189 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2190 assert(has_annotations_field(), "annotations field must be present");
2191 constructor->obj_field_put(annotations_offset, value);
2192 }
2193
2194 bool java_lang_reflect_Constructor::has_parameter_annotations_field() {
2195 return (parameter_annotations_offset >= 0);
2196 }
2197
2198 oop java_lang_reflect_Constructor::parameter_annotations(oop method) {
2199 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2200 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2201 return method->obj_field(parameter_annotations_offset);
2202 }
2203
2204 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
2205 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2206 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2207 method->obj_field_put(parameter_annotations_offset, value);
2208 }
2209
2210 bool java_lang_reflect_Constructor::has_type_annotations_field() {
2211 return (type_annotations_offset >= 0);
2212 }
2213
2214 oop java_lang_reflect_Constructor::type_annotations(oop constructor) {
2215 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2216 assert(has_type_annotations_field(), "type_annotations field must be present");
2217 return constructor->obj_field(type_annotations_offset);
2218 }
2219
2220 void java_lang_reflect_Constructor::set_type_annotations(oop constructor, oop value) {
2221 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2222 assert(has_type_annotations_field(), "type_annotations field must be present");
2223 constructor->obj_field_put(type_annotations_offset, value);
2224 }
2225
2226 void java_lang_reflect_Field::compute_offsets() {
2227 Klass* k = SystemDictionary::reflect_Field_klass();
2228 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
2229 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2230 compute_offset(type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature());
2231 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
2232 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2233 // The generic signature and annotations fields are only present in 1.5
2234 signature_offset = -1;
2235 annotations_offset = -1;
2236 type_annotations_offset = -1;
2237 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
2238 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
2239 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
2240 }
2241
2242 Handle java_lang_reflect_Field::create(TRAPS) {
2243 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2244 Symbol* name = vmSymbols::java_lang_reflect_Field();
2245 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2246 instanceKlassHandle klass (THREAD, k);
2247 // Ensure it is initialized
2248 klass->initialize(CHECK_NH);
2249 return klass->allocate_instance_handle(CHECK_NH);
2250 }
2251
2252 oop java_lang_reflect_Field::clazz(oop reflect) {
2253 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2254 return reflect->obj_field(clazz_offset);
2255 }
2256
2257 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
2258 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2259 reflect->obj_field_put(clazz_offset, value);
2260 }
2261
2262 oop java_lang_reflect_Field::name(oop field) {
2263 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2264 return field->obj_field(name_offset);
2265 }
2266
2267 void java_lang_reflect_Field::set_name(oop field, oop value) {
2268 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2269 field->obj_field_put(name_offset, value);
2270 }
2271
2272 oop java_lang_reflect_Field::type(oop field) {
2273 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2274 return field->obj_field(type_offset);
2275 }
2276
2277 void java_lang_reflect_Field::set_type(oop field, oop value) {
2278 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2279 field->obj_field_put(type_offset, value);
2280 }
2281
2282 int java_lang_reflect_Field::slot(oop reflect) {
2283 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2284 return reflect->int_field(slot_offset);
2285 }
2286
2287 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
2288 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2289 reflect->int_field_put(slot_offset, value);
2290 }
2291
2292 int java_lang_reflect_Field::modifiers(oop field) {
2293 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2294 return field->int_field(modifiers_offset);
2295 }
2296
2297 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
2298 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2299 field->int_field_put(modifiers_offset, value);
2300 }
2301
2302 bool java_lang_reflect_Field::has_signature_field() {
2303 return (signature_offset >= 0);
2304 }
2305
2306 oop java_lang_reflect_Field::signature(oop field) {
2307 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2308 assert(has_signature_field(), "signature field must be present");
2309 return field->obj_field(signature_offset);
2310 }
2311
2312 void java_lang_reflect_Field::set_signature(oop field, oop value) {
2313 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2314 assert(has_signature_field(), "signature field must be present");
2315 field->obj_field_put(signature_offset, value);
2316 }
2317
2318 bool java_lang_reflect_Field::has_annotations_field() {
2319 return (annotations_offset >= 0);
2320 }
2321
2322 oop java_lang_reflect_Field::annotations(oop field) {
2323 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2324 assert(has_annotations_field(), "annotations field must be present");
2325 return field->obj_field(annotations_offset);
2326 }
2327
2328 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
2329 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2330 assert(has_annotations_field(), "annotations field must be present");
2331 field->obj_field_put(annotations_offset, value);
2332 }
2333
2334 bool java_lang_reflect_Field::has_type_annotations_field() {
2335 return (type_annotations_offset >= 0);
2336 }
2337
2338 oop java_lang_reflect_Field::type_annotations(oop field) {
2339 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2340 assert(has_type_annotations_field(), "type_annotations field must be present");
2341 return field->obj_field(type_annotations_offset);
2342 }
2343
2344 void java_lang_reflect_Field::set_type_annotations(oop field, oop value) {
2345 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2346 assert(has_type_annotations_field(), "type_annotations field must be present");
2347 field->obj_field_put(type_annotations_offset, value);
2348 }
2349
2350 void sun_reflect_ConstantPool::compute_offsets() {
2351 Klass* k = SystemDictionary::reflect_ConstantPool_klass();
2352 // This null test can be removed post beta
2353 if (k != NULL) {
2354 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
2355 compute_offset(_oop_offset, k, vmSymbols::ConstantPool_name(), vmSymbols::object_signature());
2356 }
2357 }
2358
2359 void java_lang_reflect_Parameter::compute_offsets() {
2360 Klass* k = SystemDictionary::reflect_Parameter_klass();
2361 if(NULL != k) {
2362 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2363 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2364 compute_offset(index_offset, k, vmSymbols::index_name(), vmSymbols::int_signature());
2365 compute_offset(executable_offset, k, vmSymbols::executable_name(), vmSymbols::executable_signature());
2366 }
2367 }
2368
2369 Handle java_lang_reflect_Parameter::create(TRAPS) {
2370 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2371 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
2372 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2373 instanceKlassHandle klass (THREAD, k);
2374 // Ensure it is initialized
2375 klass->initialize(CHECK_NH);
2376 return klass->allocate_instance_handle(CHECK_NH);
2377 }
2378
2379 oop java_lang_reflect_Parameter::name(oop param) {
2380 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2381 return param->obj_field(name_offset);
2382 }
2383
2384 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
2385 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2386 param->obj_field_put(name_offset, value);
2387 }
2388
2389 int java_lang_reflect_Parameter::modifiers(oop param) {
2390 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2391 return param->int_field(modifiers_offset);
2392 }
2393
2394 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
2395 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2396 param->int_field_put(modifiers_offset, value);
2397 }
2398
2399 int java_lang_reflect_Parameter::index(oop param) {
2400 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2401 return param->int_field(index_offset);
2402 }
2403
2404 void java_lang_reflect_Parameter::set_index(oop param, int value) {
2405 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2406 param->int_field_put(index_offset, value);
2407 }
2408
2409 oop java_lang_reflect_Parameter::executable(oop param) {
2410 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2411 return param->obj_field(executable_offset);
2412 }
2413
2414 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
2415 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2416 param->obj_field_put(executable_offset, value);
2417 }
2418
2419
2420 Handle sun_reflect_ConstantPool::create(TRAPS) {
2421 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2422 Klass* k = SystemDictionary::reflect_ConstantPool_klass();
2423 instanceKlassHandle klass (THREAD, k);
2424 // Ensure it is initialized
2425 klass->initialize(CHECK_NH);
2426 return klass->allocate_instance_handle(CHECK_NH);
2427 }
2428
2429
2430 void sun_reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
2431 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2432 oop mirror = value->pool_holder()->java_mirror();
2433 // Save the mirror to get back the constant pool.
2434 reflect->obj_field_put(_oop_offset, mirror);
2435 }
2436
2437 ConstantPool* sun_reflect_ConstantPool::get_cp(oop reflect) {
2438 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2439
2440 oop mirror = reflect->obj_field(_oop_offset);
2441 Klass* k = java_lang_Class::as_Klass(mirror);
2442 assert(k->oop_is_instance(), "Must be");
2443
2444 // Get the constant pool back from the klass. Since class redefinition
2445 // merges the new constant pool into the old, this is essentially the
2446 // same constant pool as the original. If constant pool merging is
2447 // no longer done in the future, this will have to change to save
2448 // the original.
2449 return InstanceKlass::cast(k)->constants();
2450 }
2451
2452 void sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
2453 Klass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass();
2454 // This null test can be removed post beta
2455 if (k != NULL) {
2456 compute_offset(_base_offset, k,
2457 vmSymbols::base_name(), vmSymbols::object_signature());
2458 }
2459 }
2460
2461 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
2462 Klass* k = SystemDictionary::box_klass(type);
2463 if (k == NULL) return NULL;
2464 instanceKlassHandle h (THREAD, k);
2465 if (!h->is_initialized()) h->initialize(CHECK_0);
2466 return h->allocate_instance(THREAD);
2467 }
2468
2469
2470 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
2471 oop box = initialize_and_allocate(type, CHECK_0);
2472 if (box == NULL) return NULL;
2473 switch (type) {
2474 case T_BOOLEAN:
2475 box->bool_field_put(value_offset, value->z);
2476 break;
2477 case T_CHAR:
2478 box->char_field_put(value_offset, value->c);
2479 break;
2480 case T_FLOAT:
2481 box->float_field_put(value_offset, value->f);
2482 break;
2483 case T_DOUBLE:
2484 box->double_field_put(long_value_offset, value->d);
2485 break;
2486 case T_BYTE:
2487 box->byte_field_put(value_offset, value->b);
2488 break;
2489 case T_SHORT:
2490 box->short_field_put(value_offset, value->s);
2491 break;
2492 case T_INT:
2493 box->int_field_put(value_offset, value->i);
2494 break;
2495 case T_LONG:
2496 box->long_field_put(long_value_offset, value->j);
2497 break;
2498 default:
2499 return NULL;
2500 }
2501 return box;
2502 }
2503
2504
2505 BasicType java_lang_boxing_object::basic_type(oop box) {
2506 if (box == NULL) return T_ILLEGAL;
2507 BasicType type = SystemDictionary::box_klass_type(box->klass());
2508 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
2509 return T_ILLEGAL;
2510 return type;
2511 }
2512
2513
2514 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
2515 BasicType type = SystemDictionary::box_klass_type(box->klass());
2516 switch (type) {
2517 case T_BOOLEAN:
2518 value->z = box->bool_field(value_offset);
2519 break;
2520 case T_CHAR:
2521 value->c = box->char_field(value_offset);
2522 break;
2523 case T_FLOAT:
2524 value->f = box->float_field(value_offset);
2525 break;
2526 case T_DOUBLE:
2527 value->d = box->double_field(long_value_offset);
2528 break;
2529 case T_BYTE:
2530 value->b = box->byte_field(value_offset);
2531 break;
2532 case T_SHORT:
2533 value->s = box->short_field(value_offset);
2534 break;
2535 case T_INT:
2536 value->i = box->int_field(value_offset);
2537 break;
2538 case T_LONG:
2539 value->j = box->long_field(long_value_offset);
2540 break;
2541 default:
2542 return T_ILLEGAL;
2543 } // end switch
2544 return type;
2545 }
2546
2547
2548 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
2549 BasicType type = SystemDictionary::box_klass_type(box->klass());
2550 switch (type) {
2551 case T_BOOLEAN:
2552 box->bool_field_put(value_offset, value->z);
2553 break;
2554 case T_CHAR:
2555 box->char_field_put(value_offset, value->c);
2556 break;
2557 case T_FLOAT:
2558 box->float_field_put(value_offset, value->f);
2559 break;
2560 case T_DOUBLE:
2561 box->double_field_put(long_value_offset, value->d);
2562 break;
2563 case T_BYTE:
2564 box->byte_field_put(value_offset, value->b);
2565 break;
2566 case T_SHORT:
2567 box->short_field_put(value_offset, value->s);
2568 break;
2569 case T_INT:
2570 box->int_field_put(value_offset, value->i);
2571 break;
2572 case T_LONG:
2573 box->long_field_put(long_value_offset, value->j);
2574 break;
2575 default:
2576 return T_ILLEGAL;
2577 } // end switch
2578 return type;
2579 }
2580
2581
2582 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
2583 switch (type) {
2584 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
2585 case T_CHAR: st->print("%d", value->c); break;
2586 case T_BYTE: st->print("%d", value->b); break;
2587 case T_SHORT: st->print("%d", value->s); break;
2588 case T_INT: st->print("%d", value->i); break;
2589 case T_LONG: st->print(INT64_FORMAT, value->j); break;
2590 case T_FLOAT: st->print("%f", value->f); break;
2591 case T_DOUBLE: st->print("%lf", value->d); break;
2592 default: st->print("type %d?", type); break;
2593 }
2594 }
2595
2596
2597 // Support for java_lang_ref_Reference
2598 HeapWord *java_lang_ref_Reference::pending_list_lock_addr() {
2599 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2600 address addr = ik->static_field_addr(static_lock_offset);
2601 return (HeapWord*) addr;
2602 }
2603
2604 oop java_lang_ref_Reference::pending_list_lock() {
2605 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2606 address addr = ik->static_field_addr(static_lock_offset);
2607 if (UseCompressedOops) {
2608 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
2609 } else {
2610 return oopDesc::load_decode_heap_oop((oop*)addr);
2611 }
2612 }
2613
2614 HeapWord *java_lang_ref_Reference::pending_list_addr() {
2615 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2616 address addr = ik->static_field_addr(static_pending_offset);
2617 // XXX This might not be HeapWord aligned, almost rather be char *.
2618 return (HeapWord*)addr;
2619 }
2620
2621 oop java_lang_ref_Reference::pending_list() {
2622 char *addr = (char *)pending_list_addr();
2623 if (UseCompressedOops) {
2624 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
2625 } else {
2626 return oopDesc::load_decode_heap_oop((oop*)addr);
2627 }
2628 }
2629
2630
2631 // Support for java_lang_ref_SoftReference
2632
2633 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
2634 return ref->long_field(timestamp_offset);
2635 }
2636
2637 jlong java_lang_ref_SoftReference::clock() {
2638 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass());
2639 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
2640 return *offset;
2641 }
2642
2643 void java_lang_ref_SoftReference::set_clock(jlong value) {
2644 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass());
2645 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
2646 *offset = value;
2647 }
2648
2649 // Support for java_lang_invoke_DirectMethodHandle
2650
2651 int java_lang_invoke_DirectMethodHandle::_member_offset;
2652
2653 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
2654 oop member_name = NULL;
2655 bool is_dmh = dmh->is_oop() && java_lang_invoke_DirectMethodHandle::is_instance(dmh);
2656 assert(is_dmh, "a DirectMethodHandle oop is expected");
2657 if (is_dmh) {
2658 member_name = dmh->obj_field(member_offset_in_bytes());
2659 }
2660 return member_name;
2661 }
2662
2663 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
2664 Klass* klass_oop = SystemDictionary::DirectMethodHandle_klass();
2665 if (klass_oop != NULL && EnableInvokeDynamic) {
2666 compute_offset(_member_offset, klass_oop, vmSymbols::member_name(), vmSymbols::java_lang_invoke_MemberName_signature());
2667 }
2668 }
2669
2670 // Support for java_lang_invoke_MethodHandle
2671
2672 int java_lang_invoke_MethodHandle::_type_offset;
2673 int java_lang_invoke_MethodHandle::_form_offset;
2674
2675 int java_lang_invoke_MemberName::_clazz_offset;
2676 int java_lang_invoke_MemberName::_name_offset;
2677 int java_lang_invoke_MemberName::_type_offset;
2678 int java_lang_invoke_MemberName::_flags_offset;
2679 int java_lang_invoke_MemberName::_vmtarget_offset;
2680 int java_lang_invoke_MemberName::_vmloader_offset;
2681 int java_lang_invoke_MemberName::_vmindex_offset;
2682
2683 int java_lang_invoke_LambdaForm::_vmentry_offset;
2684
2685 void java_lang_invoke_MethodHandle::compute_offsets() {
2686 Klass* klass_oop = SystemDictionary::MethodHandle_klass();
2687 if (klass_oop != NULL && EnableInvokeDynamic) {
2688 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::java_lang_invoke_MethodType_signature());
2689 compute_optional_offset(_form_offset, klass_oop, vmSymbols::form_name(), vmSymbols::java_lang_invoke_LambdaForm_signature());
2690 if (_form_offset == 0) {
2691 EnableInvokeDynamic = false;
2692 }
2693 }
2694 }
2695
2696 void java_lang_invoke_MemberName::compute_offsets() {
2697 Klass* klass_oop = SystemDictionary::MemberName_klass();
2698 if (klass_oop != NULL && EnableInvokeDynamic) {
2699 compute_offset(_clazz_offset, klass_oop, vmSymbols::clazz_name(), vmSymbols::class_signature());
2700 compute_offset(_name_offset, klass_oop, vmSymbols::name_name(), vmSymbols::string_signature());
2701 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::object_signature());
2702 compute_offset(_flags_offset, klass_oop, vmSymbols::flags_name(), vmSymbols::int_signature());
2703 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2704 }
2705 }
2706
2707 void java_lang_invoke_LambdaForm::compute_offsets() {
2708 Klass* klass_oop = SystemDictionary::LambdaForm_klass();
2709 if (klass_oop != NULL && EnableInvokeDynamic) {
2710 compute_offset(_vmentry_offset, klass_oop, vmSymbols::vmentry_name(), vmSymbols::java_lang_invoke_MemberName_signature());
2711 }
2712 }
2713
2714 oop java_lang_invoke_MethodHandle::type(oop mh) {
2715 return mh->obj_field(_type_offset);
2716 }
2717
2718 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
2719 mh->obj_field_put(_type_offset, mtype);
2720 }
2721
2722 oop java_lang_invoke_MethodHandle::form(oop mh) {
2723 assert(_form_offset != 0, "");
2724 return mh->obj_field(_form_offset);
2725 }
2726
2727 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
2728 assert(_form_offset != 0, "");
2729 mh->obj_field_put(_form_offset, lform);
2730 }
2731
2732 /// MemberName accessors
2733
2734 oop java_lang_invoke_MemberName::clazz(oop mname) {
2735 assert(is_instance(mname), "wrong type");
2736 return mname->obj_field(_clazz_offset);
2737 }
2738
2739 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
2740 assert(is_instance(mname), "wrong type");
2741 mname->obj_field_put(_clazz_offset, clazz);
2742 }
2743
2744 oop java_lang_invoke_MemberName::name(oop mname) {
2745 assert(is_instance(mname), "wrong type");
2746 return mname->obj_field(_name_offset);
2747 }
2748
2749 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
2750 assert(is_instance(mname), "wrong type");
2751 mname->obj_field_put(_name_offset, name);
2752 }
2753
2754 oop java_lang_invoke_MemberName::type(oop mname) {
2755 assert(is_instance(mname), "wrong type");
2756 return mname->obj_field(_type_offset);
2757 }
2758
2759 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
2760 assert(is_instance(mname), "wrong type");
2761 mname->obj_field_put(_type_offset, type);
2762 }
2763
2764 int java_lang_invoke_MemberName::flags(oop mname) {
2765 assert(is_instance(mname), "wrong type");
2766 return mname->int_field(_flags_offset);
2767 }
2768
2769 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
2770 assert(is_instance(mname), "wrong type");
2771 mname->int_field_put(_flags_offset, flags);
2772 }
2773
2774 Metadata* java_lang_invoke_MemberName::vmtarget(oop mname) {
2775 assert(is_instance(mname), "wrong type");
2776 return (Metadata*)mname->address_field(_vmtarget_offset);
2777 }
2778
2779 bool java_lang_invoke_MemberName::is_method(oop mname) {
2780 assert(is_instance(mname), "must be MemberName");
2781 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
2782 }
2783
2784 #if INCLUDE_JVMTI
2785 // Can be executed on VM thread only
2786 void java_lang_invoke_MemberName::adjust_vmtarget(oop mname, Method* old_method,
2787 Method* new_method, bool* trace_name_printed) {
2788 assert(is_method(mname), "wrong type");
2789 assert(Thread::current()->is_VM_thread(), "not VM thread");
2790
2791 Method* target = (Method*)mname->address_field(_vmtarget_offset);
2792 if (target == old_method) {
2793 mname->address_field_put(_vmtarget_offset, (address)new_method);
2794
2795 if (RC_TRACE_IN_RANGE(0x00100000, 0x00400000)) {
2796 if (!(*trace_name_printed)) {
2797 // RC_TRACE_MESG macro has an embedded ResourceMark
2798 RC_TRACE_MESG(("adjust: name=%s",
2799 old_method->method_holder()->external_name()));
2800 *trace_name_printed = true;
2801 }
2802 // RC_TRACE macro has an embedded ResourceMark
2803 RC_TRACE(0x00400000, ("MemberName method update: %s(%s)",
2804 new_method->name()->as_C_string(),
2805 new_method->signature()->as_C_string()));
2806 }
2807 }
2808 }
2809 #endif // INCLUDE_JVMTI
2810
2811 void java_lang_invoke_MemberName::set_vmtarget(oop mname, Metadata* ref) {
2812 assert(is_instance(mname), "wrong type");
2813 // check the type of the vmtarget
2814 oop dependency = NULL;
2815 if (ref != NULL) {
2816 switch (flags(mname) & (MN_IS_METHOD |
2817 MN_IS_CONSTRUCTOR |
2818 MN_IS_FIELD)) {
2819 case MN_IS_METHOD:
2820 case MN_IS_CONSTRUCTOR:
2821 assert(ref->is_method(), "should be a method");
2822 dependency = ((Method*)ref)->method_holder()->java_mirror();
2823 break;
2824 case MN_IS_FIELD:
2825 assert(ref->is_klass(), "should be a class");
2826 dependency = ((Klass*)ref)->java_mirror();
2827 break;
2828 default:
2829 ShouldNotReachHere();
2830 }
2831 }
2832 mname->address_field_put(_vmtarget_offset, (address)ref);
2833 // Add a reference to the loader (actually mirror because anonymous classes will not have
2834 // distinct loaders) to ensure the metadata is kept alive
2835 // This mirror may be different than the one in clazz field.
2836 mname->obj_field_put(_vmloader_offset, dependency);
2837 }
2838
2839 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
2840 assert(is_instance(mname), "wrong type");
2841 return (intptr_t) mname->address_field(_vmindex_offset);
2842 }
2843
2844 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
2845 assert(is_instance(mname), "wrong type");
2846 mname->address_field_put(_vmindex_offset, (address) index);
2847 }
2848
2849 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
2850 assert(is_instance(lform), "wrong type");
2851 return lform->obj_field(_vmentry_offset);
2852 }
2853
2854
2855 // Support for java_lang_invoke_MethodType
2856
2857 int java_lang_invoke_MethodType::_rtype_offset;
2858 int java_lang_invoke_MethodType::_ptypes_offset;
2859
2860 void java_lang_invoke_MethodType::compute_offsets() {
2861 Klass* k = SystemDictionary::MethodType_klass();
2862 if (k != NULL) {
2863 compute_offset(_rtype_offset, k, vmSymbols::rtype_name(), vmSymbols::class_signature());
2864 compute_offset(_ptypes_offset, k, vmSymbols::ptypes_name(), vmSymbols::class_array_signature());
2865 }
2866 }
2867
2868 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
2869 st->print("(");
2870 objArrayOop pts = ptypes(mt);
2871 for (int i = 0, limit = pts->length(); i < limit; i++) {
2872 java_lang_Class::print_signature(pts->obj_at(i), st);
2873 }
2874 st->print(")");
2875 java_lang_Class::print_signature(rtype(mt), st);
2876 }
2877
2878 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) {
2879 ResourceMark rm;
2880 stringStream buffer(128);
2881 print_signature(mt, &buffer);
2882 const char* sigstr = buffer.base();
2883 int siglen = (int) buffer.size();
2884 Symbol *name;
2885 if (!intern_if_not_found) {
2886 name = SymbolTable::probe(sigstr, siglen);
2887 } else {
2888 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
2889 }
2890 return name;
2891 }
2892
2893 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
2894 if (mt1 == mt2)
2895 return true;
2896 if (rtype(mt1) != rtype(mt2))
2897 return false;
2898 if (ptype_count(mt1) != ptype_count(mt2))
2899 return false;
2900 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
2901 if (ptype(mt1, i) != ptype(mt2, i))
2902 return false;
2903 }
2904 return true;
2905 }
2906
2907 oop java_lang_invoke_MethodType::rtype(oop mt) {
2908 assert(is_instance(mt), "must be a MethodType");
2909 return mt->obj_field(_rtype_offset);
2910 }
2911
2912 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
2913 assert(is_instance(mt), "must be a MethodType");
2914 return (objArrayOop) mt->obj_field(_ptypes_offset);
2915 }
2916
2917 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
2918 return ptypes(mt)->obj_at(idx);
2919 }
2920
2921 int java_lang_invoke_MethodType::ptype_count(oop mt) {
2922 return ptypes(mt)->length();
2923 }
2924
2925 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
2926 objArrayOop pts = ptypes(mt);
2927 int count = pts->length();
2928 int slots = 0;
2929 for (int i = 0; i < count; i++) {
2930 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
2931 slots += type2size[bt];
2932 }
2933 return slots;
2934 }
2935
2936 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
2937 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
2938 return type2size[bt];
2939 }
2940
2941
2942 // Support for java_lang_invoke_CallSite
2943
2944 int java_lang_invoke_CallSite::_target_offset;
2945
2946 void java_lang_invoke_CallSite::compute_offsets() {
2947 if (!EnableInvokeDynamic) return;
2948 Klass* k = SystemDictionary::CallSite_klass();
2949 if (k != NULL) {
2950 compute_offset(_target_offset, k, vmSymbols::target_name(), vmSymbols::java_lang_invoke_MethodHandle_signature());
2951 }
2952 }
2953
2954
2955 // Support for java_security_AccessControlContext
2956
2957 int java_security_AccessControlContext::_context_offset = 0;
2958 int java_security_AccessControlContext::_privilegedContext_offset = 0;
2959 int java_security_AccessControlContext::_isPrivileged_offset = 0;
2960 int java_security_AccessControlContext::_isAuthorized_offset = -1;
2961
2962 void java_security_AccessControlContext::compute_offsets() {
2963 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
2964 fieldDescriptor fd;
2965 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass());
2966
2967 if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) {
2968 fatal("Invalid layout of java.security.AccessControlContext");
2969 }
2970 _context_offset = fd.offset();
2971
2972 if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) {
2973 fatal("Invalid layout of java.security.AccessControlContext");
2974 }
2975 _privilegedContext_offset = fd.offset();
2976
2977 if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) {
2978 fatal("Invalid layout of java.security.AccessControlContext");
2979 }
2980 _isPrivileged_offset = fd.offset();
2981
2982 // The offset may not be present for bootstrapping with older JDK.
2983 if (ik->find_local_field(vmSymbols::isAuthorized_name(), vmSymbols::bool_signature(), &fd)) {
2984 _isAuthorized_offset = fd.offset();
2985 }
2986 }
2987
2988
2989 bool java_security_AccessControlContext::is_authorized(Handle context) {
2990 assert(context.not_null() && context->klass() == SystemDictionary::AccessControlContext_klass(), "Invalid type");
2991 assert(_isAuthorized_offset != -1, "should be set");
2992 return context->bool_field(_isAuthorized_offset) != 0;
2993 }
2994
2995 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
2996 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
2997 // Ensure klass is initialized
2998 InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->initialize(CHECK_0);
2999 // Allocate result
3000 oop result = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->allocate_instance(CHECK_0);
3001 // Fill in values
3002 result->obj_field_put(_context_offset, context());
3003 result->obj_field_put(_privilegedContext_offset, privileged_context());
3004 result->bool_field_put(_isPrivileged_offset, isPrivileged);
3005 // whitelist AccessControlContexts created by the JVM if present
3006 if (_isAuthorized_offset != -1) {
3007 result->bool_field_put(_isAuthorized_offset, true);
3008 }
3009 return result;
3010 }
3011
3012
3013 // Support for java_lang_ClassLoader
3014
3015 bool java_lang_ClassLoader::offsets_computed = false;
3016 int java_lang_ClassLoader::_loader_data_offset = -1;
3017 int java_lang_ClassLoader::parallelCapable_offset = -1;
3018
3019 ClassLoaderData** java_lang_ClassLoader::loader_data_addr(oop loader) {
3020 assert(loader != NULL && loader->is_oop(), "loader must be oop");
3021 return (ClassLoaderData**) loader->address_field_addr(_loader_data_offset);
3022 }
3023
3024 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
3025 return *java_lang_ClassLoader::loader_data_addr(loader);
3026 }
3027
3028 void java_lang_ClassLoader::compute_offsets() {
3029 assert(!offsets_computed, "offsets should be initialized only once");
3030 offsets_computed = true;
3031
3032 // The field indicating parallelCapable (parallelLockMap) is only present starting in 7,
3033 Klass* k1 = SystemDictionary::ClassLoader_klass();
3034 compute_optional_offset(parallelCapable_offset,
3035 k1, vmSymbols::parallelCapable_name(), vmSymbols::concurrenthashmap_signature());
3036
3037 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3038 }
3039
3040 oop java_lang_ClassLoader::parent(oop loader) {
3041 assert(is_instance(loader), "loader must be oop");
3042 return loader->obj_field(parent_offset);
3043 }
3044
3045 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
3046 assert(is_instance(loader), "loader must be oop");
3047 assert(cl == NULL || is_instance(cl), "cl argument must be oop");
3048 oop acl = loader;
3049 debug_only(jint loop_count = 0);
3050 // This loop taken verbatim from ClassLoader.java:
3051 do {
3052 acl = parent(acl);
3053 if (cl == acl) {
3054 return true;
3055 }
3056 assert(++loop_count > 0, "loop_count overflow");
3057 } while (acl != NULL);
3058 return false;
3059 }
3060
3061
3062 // For class loader classes, parallelCapable defined
3063 // based on non-null field
3064 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
3065 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
3066 if (!JDK_Version::is_gte_jdk17x_version()
3067 || parallelCapable_offset == -1) {
3068 // Default for backward compatibility is false
3069 return false;
3070 }
3071 return (class_loader->obj_field(parallelCapable_offset) != NULL);
3072 }
3073
3074 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
3075 // Fix for 4474172; see evaluation for more details
3076 loader = non_reflection_class_loader(loader);
3077
3078 oop cl = SystemDictionary::java_system_loader();
3079 while(cl != NULL) {
3080 if (cl == loader) return true;
3081 cl = parent(cl);
3082 }
3083 return false;
3084 }
3085
3086 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
3087 if (loader != NULL) {
3088 // See whether this is one of the class loaders associated with
3089 // the generated bytecodes for reflection, and if so, "magically"
3090 // delegate to its parent to prevent class loading from occurring
3091 // in places where applications using reflection didn't expect it.
3092 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass();
3093 // This might be null in non-1.4 JDKs
3094 if (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)) {
3095 return parent(loader);
3096 }
3097 }
3098 return loader;
3099 }
3100
3101
3102 // Support for java_lang_System
3103 int java_lang_System::in_offset_in_bytes() {
3104 return (InstanceMirrorKlass::offset_of_static_fields() + static_in_offset);
3105 }
3106
3107
3108 int java_lang_System::out_offset_in_bytes() {
3109 return (InstanceMirrorKlass::offset_of_static_fields() + static_out_offset);
3110 }
3111
3112
3113 int java_lang_System::err_offset_in_bytes() {
3114 return (InstanceMirrorKlass::offset_of_static_fields() + static_err_offset);
3115 }
3116
3117
3118 bool java_lang_System::has_security_manager() {
3119 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::System_klass());
3120 address addr = ik->static_field_addr(static_security_offset);
3121 if (UseCompressedOops) {
3122 return oopDesc::load_decode_heap_oop((narrowOop *)addr) != NULL;
3123 } else {
3124 return oopDesc::load_decode_heap_oop((oop*)addr) != NULL;
3125 }
3126 }
3127
3128 int java_lang_Class::_klass_offset;
3129 int java_lang_Class::_array_klass_offset;
3130 int java_lang_Class::_oop_size_offset;
3131 int java_lang_Class::_static_oop_field_count_offset;
3132 int java_lang_Class::_class_loader_offset;
3133 int java_lang_Class::_protection_domain_offset;
3134 int java_lang_Class::_init_lock_offset;
3135 int java_lang_Class::_signers_offset;
3136 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL;
3137 int java_lang_Throwable::backtrace_offset;
3138 int java_lang_Throwable::detailMessage_offset;
3139 int java_lang_Throwable::cause_offset;
3140 int java_lang_Throwable::stackTrace_offset;
3141 int java_lang_Throwable::static_unassigned_stacktrace_offset;
3142 int java_lang_reflect_AccessibleObject::override_offset;
3143 int java_lang_reflect_Method::clazz_offset;
3144 int java_lang_reflect_Method::name_offset;
3145 int java_lang_reflect_Method::returnType_offset;
3146 int java_lang_reflect_Method::parameterTypes_offset;
3147 int java_lang_reflect_Method::exceptionTypes_offset;
3148 int java_lang_reflect_Method::slot_offset;
3149 int java_lang_reflect_Method::modifiers_offset;
3150 int java_lang_reflect_Method::signature_offset;
3151 int java_lang_reflect_Method::annotations_offset;
3152 int java_lang_reflect_Method::parameter_annotations_offset;
3153 int java_lang_reflect_Method::annotation_default_offset;
3154 int java_lang_reflect_Method::type_annotations_offset;
3155 int java_lang_reflect_Constructor::clazz_offset;
3156 int java_lang_reflect_Constructor::parameterTypes_offset;
3157 int java_lang_reflect_Constructor::exceptionTypes_offset;
3158 int java_lang_reflect_Constructor::slot_offset;
3159 int java_lang_reflect_Constructor::modifiers_offset;
3160 int java_lang_reflect_Constructor::signature_offset;
3161 int java_lang_reflect_Constructor::annotations_offset;
3162 int java_lang_reflect_Constructor::parameter_annotations_offset;
3163 int java_lang_reflect_Constructor::type_annotations_offset;
3164 int java_lang_reflect_Field::clazz_offset;
3165 int java_lang_reflect_Field::name_offset;
3166 int java_lang_reflect_Field::type_offset;
3167 int java_lang_reflect_Field::slot_offset;
3168 int java_lang_reflect_Field::modifiers_offset;
3169 int java_lang_reflect_Field::signature_offset;
3170 int java_lang_reflect_Field::annotations_offset;
3171 int java_lang_reflect_Field::type_annotations_offset;
3172 int java_lang_reflect_Parameter::name_offset;
3173 int java_lang_reflect_Parameter::modifiers_offset;
3174 int java_lang_reflect_Parameter::index_offset;
3175 int java_lang_reflect_Parameter::executable_offset;
3176 int java_lang_boxing_object::value_offset;
3177 int java_lang_boxing_object::long_value_offset;
3178 int java_lang_ref_Reference::referent_offset;
3179 int java_lang_ref_Reference::queue_offset;
3180 int java_lang_ref_Reference::next_offset;
3181 int java_lang_ref_Reference::discovered_offset;
3182 int java_lang_ref_Reference::static_lock_offset;
3183 int java_lang_ref_Reference::static_pending_offset;
3184 int java_lang_ref_Reference::number_of_fake_oop_fields;
3185 int java_lang_ref_SoftReference::timestamp_offset;
3186 int java_lang_ref_SoftReference::static_clock_offset;
3187 int java_lang_ClassLoader::parent_offset;
3188 int java_lang_System::static_in_offset;
3189 int java_lang_System::static_out_offset;
3190 int java_lang_System::static_err_offset;
3191 int java_lang_System::static_security_offset;
3192 int java_lang_StackTraceElement::declaringClass_offset;
3193 int java_lang_StackTraceElement::methodName_offset;
3194 int java_lang_StackTraceElement::fileName_offset;
3195 int java_lang_StackTraceElement::lineNumber_offset;
3196 int java_lang_AssertionStatusDirectives::classes_offset;
3197 int java_lang_AssertionStatusDirectives::classEnabled_offset;
3198 int java_lang_AssertionStatusDirectives::packages_offset;
3199 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
3200 int java_lang_AssertionStatusDirectives::deflt_offset;
3201 int java_nio_Buffer::_limit_offset;
3202 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0;
3203 int sun_reflect_ConstantPool::_oop_offset;
3204 int sun_reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
3205
3206
3207 // Support for java_lang_StackTraceElement
3208
3209 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
3210 element->obj_field_put(fileName_offset, value);
3211 }
3212
3213 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
3214 element->obj_field_put(declaringClass_offset, value);
3215 }
3216
3217 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
3218 element->obj_field_put(methodName_offset, value);
3219 }
3220
3221 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
3222 element->int_field_put(lineNumber_offset, value);
3223 }
3224
3225
3226 // Support for java Assertions - java_lang_AssertionStatusDirectives.
3227
3228 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
3229 o->obj_field_put(classes_offset, val);
3230 }
3231
3232 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
3233 o->obj_field_put(classEnabled_offset, val);
3234 }
3235
3236 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
3237 o->obj_field_put(packages_offset, val);
3238 }
3239
3240 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
3241 o->obj_field_put(packageEnabled_offset, val);
3242 }
3243
3244 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
3245 o->bool_field_put(deflt_offset, val);
3246 }
3247
3248
3249 // Support for intrinsification of java.nio.Buffer.checkIndex
3250 int java_nio_Buffer::limit_offset() {
3251 return _limit_offset;
3252 }
3253
3254
3255 void java_nio_Buffer::compute_offsets() {
3256 Klass* k = SystemDictionary::nio_Buffer_klass();
3257 assert(k != NULL, "must be loaded in 1.4+");
3258 compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature());
3259 }
3260
3261 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) {
3262 if (_owner_offset != 0) return;
3263
3264 assert(JDK_Version::is_gte_jdk16x_version(), "Must be JDK 1.6 or later");
3265 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK);
3266 Klass* k = SystemDictionary::abstract_ownable_synchronizer_klass();
3267 compute_offset(_owner_offset, k,
3268 vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature());
3269 }
3270
3271 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
3272 assert(_owner_offset != 0, "Must be initialized");
3273 return obj->obj_field(_owner_offset);
3274 }
3275
3276 // Compute hard-coded offsets
3277 // Invoked before SystemDictionary::initialize, so pre-loaded classes
3278 // are not available to determine the offset_of_static_fields.
3279 void JavaClasses::compute_hard_coded_offsets() {
3280 const int x = heapOopSize;
3281 const int header = instanceOopDesc::base_offset_in_bytes();
3282
3283 // Throwable Class
3284 java_lang_Throwable::backtrace_offset = java_lang_Throwable::hc_backtrace_offset * x + header;
3285 java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header;
3286 java_lang_Throwable::cause_offset = java_lang_Throwable::hc_cause_offset * x + header;
3287 java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header;
3288 java_lang_Throwable::static_unassigned_stacktrace_offset = java_lang_Throwable::hc_static_unassigned_stacktrace_offset * x;
3289
3290 // java_lang_boxing_object
3291 java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header;
3292 java_lang_boxing_object::long_value_offset = align_size_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong);
3293
3294 // java_lang_ref_Reference:
3295 java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header;
3296 java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header;
3297 java_lang_ref_Reference::next_offset = java_lang_ref_Reference::hc_next_offset * x + header;
3298 java_lang_ref_Reference::discovered_offset = java_lang_ref_Reference::hc_discovered_offset * x + header;
3299 java_lang_ref_Reference::static_lock_offset = java_lang_ref_Reference::hc_static_lock_offset * x;
3300 java_lang_ref_Reference::static_pending_offset = java_lang_ref_Reference::hc_static_pending_offset * x;
3301 // Artificial fields for java_lang_ref_Reference
3302 // The first field is for the discovered field added in 1.4
3303 java_lang_ref_Reference::number_of_fake_oop_fields = 1;
3304
3305 // java_lang_ref_SoftReference Class
3306 java_lang_ref_SoftReference::timestamp_offset = align_size_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong);
3307 // Don't multiply static fields because they are always in wordSize units
3308 java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x;
3309
3310 // java_lang_ClassLoader
3311 java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header;
3312
3313 // java_lang_System
3314 java_lang_System::static_in_offset = java_lang_System::hc_static_in_offset * x;
3315 java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x;
3316 java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x;
3317 java_lang_System::static_security_offset = java_lang_System::hc_static_security_offset * x;
3318
3319 // java_lang_StackTraceElement
3320 java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset * x + header;
3321 java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header;
3322 java_lang_StackTraceElement::fileName_offset = java_lang_StackTraceElement::hc_fileName_offset * x + header;
3323 java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header;
3324 java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header;
3325 java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header;
3326 java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header;
3327 java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header;
3328 java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header;
3329
3330 }
3331
3332
3333 // Compute non-hard-coded field offsets of all the classes in this file
3334 void JavaClasses::compute_offsets() {
3335 // java_lang_Class::compute_offsets was called earlier in bootstrap
3336 java_lang_ClassLoader::compute_offsets();
3337 java_lang_Thread::compute_offsets();
3338 java_lang_ThreadGroup::compute_offsets();
3339 if (EnableInvokeDynamic) {
3340 java_lang_invoke_MethodHandle::compute_offsets();
3341 java_lang_invoke_DirectMethodHandle::compute_offsets();
3342 java_lang_invoke_MemberName::compute_offsets();
3343 java_lang_invoke_LambdaForm::compute_offsets();
3344 java_lang_invoke_MethodType::compute_offsets();
3345 java_lang_invoke_CallSite::compute_offsets();
3346 }
3347 java_security_AccessControlContext::compute_offsets();
3348 // Initialize reflection classes. The layouts of these classes
3349 // changed with the new reflection implementation in JDK 1.4, and
3350 // since the Universe doesn't know what JDK version it is until this
3351 // point we defer computation of these offsets until now.
3352 java_lang_reflect_AccessibleObject::compute_offsets();
3353 java_lang_reflect_Method::compute_offsets();
3354 java_lang_reflect_Constructor::compute_offsets();
3355 java_lang_reflect_Field::compute_offsets();
3356 if (JDK_Version::is_gte_jdk14x_version()) {
3357 java_nio_Buffer::compute_offsets();
3358 }
3359 if (JDK_Version::is_gte_jdk15x_version()) {
3360 sun_reflect_ConstantPool::compute_offsets();
3361 sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets();
3362 }
3363 if (JDK_Version::is_jdk18x_version())
3364 java_lang_reflect_Parameter::compute_offsets();
3365
3366 // generated interpreter code wants to know about the offsets we just computed:
3367 AbstractAssembler::update_delayed_values();
3368 }
3369
3370 #ifndef PRODUCT
3371
3372 // These functions exist to assert the validity of hard-coded field offsets to guard
3373 // against changes in the class files
3374
3375 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
3376 EXCEPTION_MARK;
3377 fieldDescriptor fd;
3378 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3379 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3380 instanceKlassHandle h_klass (THREAD, k);
3381 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3382 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3383 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3384 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
3385 return false;
3386 }
3387 if (fd.is_static()) {
3388 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
3389 return false;
3390 }
3391 if (fd.offset() == hardcoded_offset ) {
3392 return true;
3393 } else {
3394 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
3395 klass_name, field_name, hardcoded_offset, fd.offset());
3396 return false;
3397 }
3398 }
3399
3400
3401 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
3402 EXCEPTION_MARK;
3403 fieldDescriptor fd;
3404 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3405 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3406 instanceKlassHandle h_klass (THREAD, k);
3407 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3408 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3409 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3410 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3411 return false;
3412 }
3413 if (!fd.is_static()) {
3414 tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name);
3415 return false;
3416 }
3417 if (fd.offset() == hardcoded_offset + InstanceMirrorKlass::offset_of_static_fields()) {
3418 return true;
3419 } else {
3420 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());
3421 return false;
3422 }
3423 }
3424
3425
3426 bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) {
3427 EXCEPTION_MARK;
3428 fieldDescriptor fd;
3429 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3430 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3431 instanceKlassHandle h_klass (THREAD, k);
3432 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3433 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3434 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3435 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3436 return false;
3437 }
3438 if (!fd.is_static() || !fd.has_initial_value()) {
3439 tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name);
3440 return false;
3441 }
3442 if (!fd.initial_value_tag().is_int()) {
3443 tty->print_cr("Static field %s.%s is not an int", klass_name, field_name);
3444 return false;
3445 }
3446 jint field_value = fd.int_initial_value();
3447 if (field_value == hardcoded_constant) {
3448 return true;
3449 } else {
3450 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);
3451 return false;
3452 }
3453 }
3454
3455
3456 // Check the hard-coded field offsets of all the classes in this file
3457
3458 void JavaClasses::check_offsets() {
3459 bool valid = true;
3460 HandleMark hm;
3461
3462 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3463 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
3464
3465 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3466 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
3467
3468 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3469 valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig)
3470
3471 #define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \
3472 valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig)
3473
3474 // java.lang.String
3475
3476 CHECK_OFFSET("java/lang/String", java_lang_String, value, "[C");
3477 if (java_lang_String::has_offset_field()) {
3478 CHECK_OFFSET("java/lang/String", java_lang_String, offset, "I");
3479 CHECK_OFFSET("java/lang/String", java_lang_String, count, "I");
3480 }
3481 if (java_lang_String::has_hash_field()) {
3482 CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I");
3483 }
3484
3485 // java.lang.Class
3486
3487 // Fake fields
3488 // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked
3489 // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked
3490
3491 // java.lang.Throwable
3492
3493 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;");
3494 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;");
3495 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, cause, "Ljava/lang/Throwable;");
3496 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;");
3497
3498 // Boxed primitive objects (java_lang_boxing_object)
3499
3500 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
3501 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
3502 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
3503 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
3504 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
3505 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
3506 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
3507 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
3508
3509 // java.lang.ClassLoader
3510
3511 CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent, "Ljava/lang/ClassLoader;");
3512
3513 // java.lang.System
3514
3515 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, in, "Ljava/io/InputStream;");
3516 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;");
3517 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;");
3518 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, security, "Ljava/lang/SecurityManager;");
3519
3520 // java.lang.StackTraceElement
3521
3522 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;");
3523 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;");
3524 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, fileName, "Ljava/lang/String;");
3525 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I");
3526
3527 // java.lang.ref.Reference
3528
3529 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
3530 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
3531 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
3532 // Fake field
3533 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
3534 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, lock, "Ljava/lang/ref/Reference$Lock;");
3535 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, pending, "Ljava/lang/ref/Reference;");
3536
3537 // java.lang.ref.SoftReference
3538
3539 CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J");
3540 CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J");
3541
3542 // java.lang.AssertionStatusDirectives
3543 //
3544 // The CheckAssertionStatusDirectives boolean can be removed from here and
3545 // globals.hpp after the AssertionStatusDirectives class has been integrated
3546 // into merlin "for some time." Without it, the vm will fail with early
3547 // merlin builds.
3548
3549 if (CheckAssertionStatusDirectives && JDK_Version::is_gte_jdk14x_version()) {
3550 const char* nm = "java/lang/AssertionStatusDirectives";
3551 const char* sig = "[Ljava/lang/String;";
3552 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig);
3553 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z");
3554 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig);
3555 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z");
3556 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z");
3557 }
3558
3559 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
3560 }
3561
3562 #endif // PRODUCT
3563
3564 int InjectedField::compute_offset() {
3565 Klass* klass_oop = klass();
3566 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
3567 if (!may_be_java && !fs.access_flags().is_internal()) {
3568 // Only look at injected fields
3569 continue;
3570 }
3571 if (fs.name() == name() && fs.signature() == signature()) {
3572 return fs.offset();
3573 }
3574 }
3575 ResourceMark rm;
3576 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)" : "");
3577 #ifndef PRODUCT
3578 klass_oop->print();
3579 tty->print_cr("all fields:");
3580 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
3581 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
3582 }
3583 #endif //PRODUCT
3584 fatal("Invalid layout of preloaded class");
3585 return -1;
3586 }
3587
3588 void javaClasses_init() {
3589 JavaClasses::compute_offsets();
3590 JavaClasses::check_offsets();
3591 FilteredFieldsMap::initialize(); // must be done after computing offsets.
3592 }